1 /* PowerPC-specific support for 32-bit ELF 2 Copyright (C) 1994-2017 Free Software Foundation, Inc. 3 Written by Ian Lance Taylor, Cygnus Support. 4 5 This file is part of BFD, the Binary File Descriptor library. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the 19 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, 20 Boston, MA 02110-1301, USA. */ 21 22 23 /* This file is based on a preliminary PowerPC ELF ABI. The 24 information may not match the final PowerPC ELF ABI. It includes 25 suggestions from the in-progress Embedded PowerPC ABI, and that 26 information may also not match. */ 27 28 #include "sysdep.h" 29 #include <stdarg.h> 30 #include "bfd.h" 31 #include "bfdlink.h" 32 #include "libbfd.h" 33 #include "elf-bfd.h" 34 #include "elf/ppc.h" 35 #include "elf32-ppc.h" 36 #include "elf-vxworks.h" 37 #include "dwarf2.h" 38 #include "opcode/ppc.h" 39 40 typedef enum split16_format_type 41 { 42 split16a_type = 0, 43 split16d_type 44 } 45 split16_format_type; 46 47 /* RELA relocations are used here. */ 48 49 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc 50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 51 static bfd_reloc_status_type ppc_elf_unhandled_reloc 52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 53 54 /* Branch prediction bit for branch taken relocs. */ 55 #define BRANCH_PREDICT_BIT 0x200000 56 /* Mask to set RA in memory instructions. */ 57 #define RA_REGISTER_MASK 0x001f0000 58 /* Value to shift register by to insert RA. */ 59 #define RA_REGISTER_SHIFT 16 60 61 /* The name of the dynamic interpreter. This is put in the .interp 62 section. */ 63 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" 64 65 /* For old-style PLT. */ 66 /* The number of single-slot PLT entries (the rest use two slots). */ 67 #define PLT_NUM_SINGLE_ENTRIES 8192 68 69 /* For new-style .glink and .plt. */ 70 #define GLINK_PLTRESOLVE 16*4 71 #define GLINK_ENTRY_SIZE 4*4 72 #define TLS_GET_ADDR_GLINK_SIZE 12*4 73 74 /* VxWorks uses its own plt layout, filled in by the static linker. */ 75 76 /* The standard VxWorks PLT entry. */ 77 #define VXWORKS_PLT_ENTRY_SIZE 32 78 static const bfd_vma ppc_elf_vxworks_plt_entry 79 [VXWORKS_PLT_ENTRY_SIZE / 4] = 80 { 81 0x3d800000, /* lis r12,0 */ 82 0x818c0000, /* lwz r12,0(r12) */ 83 0x7d8903a6, /* mtctr r12 */ 84 0x4e800420, /* bctr */ 85 0x39600000, /* li r11,0 */ 86 0x48000000, /* b 14 <.PLT0resolve+0x4> */ 87 0x60000000, /* nop */ 88 0x60000000, /* nop */ 89 }; 90 static const bfd_vma ppc_elf_vxworks_pic_plt_entry 91 [VXWORKS_PLT_ENTRY_SIZE / 4] = 92 { 93 0x3d9e0000, /* addis r12,r30,0 */ 94 0x818c0000, /* lwz r12,0(r12) */ 95 0x7d8903a6, /* mtctr r12 */ 96 0x4e800420, /* bctr */ 97 0x39600000, /* li r11,0 */ 98 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */ 99 0x60000000, /* nop */ 100 0x60000000, /* nop */ 101 }; 102 103 /* The initial VxWorks PLT entry. */ 104 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32 105 static const bfd_vma ppc_elf_vxworks_plt0_entry 106 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] = 107 { 108 0x3d800000, /* lis r12,0 */ 109 0x398c0000, /* addi r12,r12,0 */ 110 0x800c0008, /* lwz r0,8(r12) */ 111 0x7c0903a6, /* mtctr r0 */ 112 0x818c0004, /* lwz r12,4(r12) */ 113 0x4e800420, /* bctr */ 114 0x60000000, /* nop */ 115 0x60000000, /* nop */ 116 }; 117 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry 118 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] = 119 { 120 0x819e0008, /* lwz r12,8(r30) */ 121 0x7d8903a6, /* mtctr r12 */ 122 0x819e0004, /* lwz r12,4(r30) */ 123 0x4e800420, /* bctr */ 124 0x60000000, /* nop */ 125 0x60000000, /* nop */ 126 0x60000000, /* nop */ 127 0x60000000, /* nop */ 128 }; 129 130 /* For executables, we have some additional relocations in 131 .rela.plt.unloaded, for the kernel loader. */ 132 133 /* The number of non-JMP_SLOT relocations per PLT0 slot. */ 134 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3 135 /* The number of relocations in the PLTResolve slot. */ 136 #define VXWORKS_PLTRESOLVE_RELOCS 2 137 /* The number of relocations in the PLTResolve slot when when creating 138 a shared library. */ 139 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0 140 141 /* Some instructions. */ 142 #define ADDIS_11_11 0x3d6b0000 143 #define ADDIS_11_30 0x3d7e0000 144 #define ADDIS_12_12 0x3d8c0000 145 #define ADDI_11_11 0x396b0000 146 #define ADD_0_11_11 0x7c0b5a14 147 #define ADD_3_12_2 0x7c6c1214 148 #define ADD_11_0_11 0x7d605a14 149 #define B 0x48000000 150 #define BA 0x48000002 151 #define BCL_20_31 0x429f0005 152 #define BCTR 0x4e800420 153 #define BEQLR 0x4d820020 154 #define CMPWI_11_0 0x2c0b0000 155 #define LIS_11 0x3d600000 156 #define LIS_12 0x3d800000 157 #define LWZU_0_12 0x840c0000 158 #define LWZ_0_12 0x800c0000 159 #define LWZ_11_3 0x81630000 160 #define LWZ_11_11 0x816b0000 161 #define LWZ_11_30 0x817e0000 162 #define LWZ_12_3 0x81830000 163 #define LWZ_12_12 0x818c0000 164 #define MR_0_3 0x7c601b78 165 #define MR_3_0 0x7c030378 166 #define MFLR_0 0x7c0802a6 167 #define MFLR_12 0x7d8802a6 168 #define MTCTR_0 0x7c0903a6 169 #define MTCTR_11 0x7d6903a6 170 #define MTLR_0 0x7c0803a6 171 #define NOP 0x60000000 172 #define SUB_11_11_12 0x7d6c5850 173 174 /* Offset of tp and dtp pointers from start of TLS block. */ 175 #define TP_OFFSET 0x7000 176 #define DTP_OFFSET 0x8000 177 178 /* The value of a defined global symbol. */ 179 #define SYM_VAL(SYM) \ 180 ((SYM)->root.u.def.section->output_section->vma \ 181 + (SYM)->root.u.def.section->output_offset \ 182 + (SYM)->root.u.def.value) 183 184 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max]; 185 186 static reloc_howto_type ppc_elf_howto_raw[] = { 187 /* This reloc does nothing. */ 188 HOWTO (R_PPC_NONE, /* type */ 189 0, /* rightshift */ 190 3, /* size (0 = byte, 1 = short, 2 = long) */ 191 0, /* bitsize */ 192 FALSE, /* pc_relative */ 193 0, /* bitpos */ 194 complain_overflow_dont, /* complain_on_overflow */ 195 bfd_elf_generic_reloc, /* special_function */ 196 "R_PPC_NONE", /* name */ 197 FALSE, /* partial_inplace */ 198 0, /* src_mask */ 199 0, /* dst_mask */ 200 FALSE), /* pcrel_offset */ 201 202 /* A standard 32 bit relocation. */ 203 HOWTO (R_PPC_ADDR32, /* type */ 204 0, /* rightshift */ 205 2, /* size (0 = byte, 1 = short, 2 = long) */ 206 32, /* bitsize */ 207 FALSE, /* pc_relative */ 208 0, /* bitpos */ 209 complain_overflow_dont, /* complain_on_overflow */ 210 bfd_elf_generic_reloc, /* special_function */ 211 "R_PPC_ADDR32", /* name */ 212 FALSE, /* partial_inplace */ 213 0, /* src_mask */ 214 0xffffffff, /* dst_mask */ 215 FALSE), /* pcrel_offset */ 216 217 /* An absolute 26 bit branch; the lower two bits must be zero. 218 FIXME: we don't check that, we just clear them. */ 219 HOWTO (R_PPC_ADDR24, /* type */ 220 0, /* rightshift */ 221 2, /* size (0 = byte, 1 = short, 2 = long) */ 222 26, /* bitsize */ 223 FALSE, /* pc_relative */ 224 0, /* bitpos */ 225 complain_overflow_signed, /* complain_on_overflow */ 226 bfd_elf_generic_reloc, /* special_function */ 227 "R_PPC_ADDR24", /* name */ 228 FALSE, /* partial_inplace */ 229 0, /* src_mask */ 230 0x3fffffc, /* dst_mask */ 231 FALSE), /* pcrel_offset */ 232 233 /* A standard 16 bit relocation. */ 234 HOWTO (R_PPC_ADDR16, /* type */ 235 0, /* rightshift */ 236 1, /* size (0 = byte, 1 = short, 2 = long) */ 237 16, /* bitsize */ 238 FALSE, /* pc_relative */ 239 0, /* bitpos */ 240 complain_overflow_bitfield, /* complain_on_overflow */ 241 bfd_elf_generic_reloc, /* special_function */ 242 "R_PPC_ADDR16", /* name */ 243 FALSE, /* partial_inplace */ 244 0, /* src_mask */ 245 0xffff, /* dst_mask */ 246 FALSE), /* pcrel_offset */ 247 248 /* A 16 bit relocation without overflow. */ 249 HOWTO (R_PPC_ADDR16_LO, /* type */ 250 0, /* rightshift */ 251 1, /* size (0 = byte, 1 = short, 2 = long) */ 252 16, /* bitsize */ 253 FALSE, /* pc_relative */ 254 0, /* bitpos */ 255 complain_overflow_dont,/* complain_on_overflow */ 256 bfd_elf_generic_reloc, /* special_function */ 257 "R_PPC_ADDR16_LO", /* name */ 258 FALSE, /* partial_inplace */ 259 0, /* src_mask */ 260 0xffff, /* dst_mask */ 261 FALSE), /* pcrel_offset */ 262 263 /* The high order 16 bits of an address. */ 264 HOWTO (R_PPC_ADDR16_HI, /* type */ 265 16, /* rightshift */ 266 1, /* size (0 = byte, 1 = short, 2 = long) */ 267 16, /* bitsize */ 268 FALSE, /* pc_relative */ 269 0, /* bitpos */ 270 complain_overflow_dont, /* complain_on_overflow */ 271 bfd_elf_generic_reloc, /* special_function */ 272 "R_PPC_ADDR16_HI", /* name */ 273 FALSE, /* partial_inplace */ 274 0, /* src_mask */ 275 0xffff, /* dst_mask */ 276 FALSE), /* pcrel_offset */ 277 278 /* The high order 16 bits of an address, plus 1 if the contents of 279 the low 16 bits, treated as a signed number, is negative. */ 280 HOWTO (R_PPC_ADDR16_HA, /* type */ 281 16, /* rightshift */ 282 1, /* size (0 = byte, 1 = short, 2 = long) */ 283 16, /* bitsize */ 284 FALSE, /* pc_relative */ 285 0, /* bitpos */ 286 complain_overflow_dont, /* complain_on_overflow */ 287 ppc_elf_addr16_ha_reloc, /* special_function */ 288 "R_PPC_ADDR16_HA", /* name */ 289 FALSE, /* partial_inplace */ 290 0, /* src_mask */ 291 0xffff, /* dst_mask */ 292 FALSE), /* pcrel_offset */ 293 294 /* An absolute 16 bit branch; the lower two bits must be zero. 295 FIXME: we don't check that, we just clear them. */ 296 HOWTO (R_PPC_ADDR14, /* type */ 297 0, /* rightshift */ 298 2, /* size (0 = byte, 1 = short, 2 = long) */ 299 16, /* bitsize */ 300 FALSE, /* pc_relative */ 301 0, /* bitpos */ 302 complain_overflow_signed, /* complain_on_overflow */ 303 bfd_elf_generic_reloc, /* special_function */ 304 "R_PPC_ADDR14", /* name */ 305 FALSE, /* partial_inplace */ 306 0, /* src_mask */ 307 0xfffc, /* dst_mask */ 308 FALSE), /* pcrel_offset */ 309 310 /* An absolute 16 bit branch, for which bit 10 should be set to 311 indicate that the branch is expected to be taken. The lower two 312 bits must be zero. */ 313 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */ 314 0, /* rightshift */ 315 2, /* size (0 = byte, 1 = short, 2 = long) */ 316 16, /* bitsize */ 317 FALSE, /* pc_relative */ 318 0, /* bitpos */ 319 complain_overflow_signed, /* complain_on_overflow */ 320 bfd_elf_generic_reloc, /* special_function */ 321 "R_PPC_ADDR14_BRTAKEN",/* name */ 322 FALSE, /* partial_inplace */ 323 0, /* src_mask */ 324 0xfffc, /* dst_mask */ 325 FALSE), /* pcrel_offset */ 326 327 /* An absolute 16 bit branch, for which bit 10 should be set to 328 indicate that the branch is not expected to be taken. The lower 329 two bits must be zero. */ 330 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */ 331 0, /* rightshift */ 332 2, /* size (0 = byte, 1 = short, 2 = long) */ 333 16, /* bitsize */ 334 FALSE, /* pc_relative */ 335 0, /* bitpos */ 336 complain_overflow_signed, /* complain_on_overflow */ 337 bfd_elf_generic_reloc, /* special_function */ 338 "R_PPC_ADDR14_BRNTAKEN",/* name */ 339 FALSE, /* partial_inplace */ 340 0, /* src_mask */ 341 0xfffc, /* dst_mask */ 342 FALSE), /* pcrel_offset */ 343 344 /* A relative 26 bit branch; the lower two bits must be zero. */ 345 HOWTO (R_PPC_REL24, /* type */ 346 0, /* rightshift */ 347 2, /* size (0 = byte, 1 = short, 2 = long) */ 348 26, /* bitsize */ 349 TRUE, /* pc_relative */ 350 0, /* bitpos */ 351 complain_overflow_signed, /* complain_on_overflow */ 352 bfd_elf_generic_reloc, /* special_function */ 353 "R_PPC_REL24", /* name */ 354 FALSE, /* partial_inplace */ 355 0, /* src_mask */ 356 0x3fffffc, /* dst_mask */ 357 TRUE), /* pcrel_offset */ 358 359 /* A relative 16 bit branch; the lower two bits must be zero. */ 360 HOWTO (R_PPC_REL14, /* type */ 361 0, /* rightshift */ 362 2, /* size (0 = byte, 1 = short, 2 = long) */ 363 16, /* bitsize */ 364 TRUE, /* pc_relative */ 365 0, /* bitpos */ 366 complain_overflow_signed, /* complain_on_overflow */ 367 bfd_elf_generic_reloc, /* special_function */ 368 "R_PPC_REL14", /* name */ 369 FALSE, /* partial_inplace */ 370 0, /* src_mask */ 371 0xfffc, /* dst_mask */ 372 TRUE), /* pcrel_offset */ 373 374 /* A relative 16 bit branch. Bit 10 should be set to indicate that 375 the branch is expected to be taken. The lower two bits must be 376 zero. */ 377 HOWTO (R_PPC_REL14_BRTAKEN, /* type */ 378 0, /* rightshift */ 379 2, /* size (0 = byte, 1 = short, 2 = long) */ 380 16, /* bitsize */ 381 TRUE, /* pc_relative */ 382 0, /* bitpos */ 383 complain_overflow_signed, /* complain_on_overflow */ 384 bfd_elf_generic_reloc, /* special_function */ 385 "R_PPC_REL14_BRTAKEN", /* name */ 386 FALSE, /* partial_inplace */ 387 0, /* src_mask */ 388 0xfffc, /* dst_mask */ 389 TRUE), /* pcrel_offset */ 390 391 /* A relative 16 bit branch. Bit 10 should be set to indicate that 392 the branch is not expected to be taken. The lower two bits must 393 be zero. */ 394 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */ 395 0, /* rightshift */ 396 2, /* size (0 = byte, 1 = short, 2 = long) */ 397 16, /* bitsize */ 398 TRUE, /* pc_relative */ 399 0, /* bitpos */ 400 complain_overflow_signed, /* complain_on_overflow */ 401 bfd_elf_generic_reloc, /* special_function */ 402 "R_PPC_REL14_BRNTAKEN",/* name */ 403 FALSE, /* partial_inplace */ 404 0, /* src_mask */ 405 0xfffc, /* dst_mask */ 406 TRUE), /* pcrel_offset */ 407 408 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the 409 symbol. */ 410 HOWTO (R_PPC_GOT16, /* type */ 411 0, /* rightshift */ 412 1, /* size (0 = byte, 1 = short, 2 = long) */ 413 16, /* bitsize */ 414 FALSE, /* pc_relative */ 415 0, /* bitpos */ 416 complain_overflow_signed, /* complain_on_overflow */ 417 ppc_elf_unhandled_reloc, /* special_function */ 418 "R_PPC_GOT16", /* name */ 419 FALSE, /* partial_inplace */ 420 0, /* src_mask */ 421 0xffff, /* dst_mask */ 422 FALSE), /* pcrel_offset */ 423 424 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for 425 the symbol. */ 426 HOWTO (R_PPC_GOT16_LO, /* type */ 427 0, /* rightshift */ 428 1, /* size (0 = byte, 1 = short, 2 = long) */ 429 16, /* bitsize */ 430 FALSE, /* pc_relative */ 431 0, /* bitpos */ 432 complain_overflow_dont, /* complain_on_overflow */ 433 ppc_elf_unhandled_reloc, /* special_function */ 434 "R_PPC_GOT16_LO", /* name */ 435 FALSE, /* partial_inplace */ 436 0, /* src_mask */ 437 0xffff, /* dst_mask */ 438 FALSE), /* pcrel_offset */ 439 440 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for 441 the symbol. */ 442 HOWTO (R_PPC_GOT16_HI, /* type */ 443 16, /* rightshift */ 444 1, /* size (0 = byte, 1 = short, 2 = long) */ 445 16, /* bitsize */ 446 FALSE, /* pc_relative */ 447 0, /* bitpos */ 448 complain_overflow_dont, /* complain_on_overflow */ 449 ppc_elf_unhandled_reloc, /* special_function */ 450 "R_PPC_GOT16_HI", /* name */ 451 FALSE, /* partial_inplace */ 452 0, /* src_mask */ 453 0xffff, /* dst_mask */ 454 FALSE), /* pcrel_offset */ 455 456 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for 457 the symbol. */ 458 HOWTO (R_PPC_GOT16_HA, /* type */ 459 16, /* rightshift */ 460 1, /* size (0 = byte, 1 = short, 2 = long) */ 461 16, /* bitsize */ 462 FALSE, /* pc_relative */ 463 0, /* bitpos */ 464 complain_overflow_dont, /* complain_on_overflow */ 465 ppc_elf_unhandled_reloc, /* special_function */ 466 "R_PPC_GOT16_HA", /* name */ 467 FALSE, /* partial_inplace */ 468 0, /* src_mask */ 469 0xffff, /* dst_mask */ 470 FALSE), /* pcrel_offset */ 471 472 /* Like R_PPC_REL24, but referring to the procedure linkage table 473 entry for the symbol. */ 474 HOWTO (R_PPC_PLTREL24, /* type */ 475 0, /* rightshift */ 476 2, /* size (0 = byte, 1 = short, 2 = long) */ 477 26, /* bitsize */ 478 TRUE, /* pc_relative */ 479 0, /* bitpos */ 480 complain_overflow_signed, /* complain_on_overflow */ 481 ppc_elf_unhandled_reloc, /* special_function */ 482 "R_PPC_PLTREL24", /* name */ 483 FALSE, /* partial_inplace */ 484 0, /* src_mask */ 485 0x3fffffc, /* dst_mask */ 486 TRUE), /* pcrel_offset */ 487 488 /* This is used only by the dynamic linker. The symbol should exist 489 both in the object being run and in some shared library. The 490 dynamic linker copies the data addressed by the symbol from the 491 shared library into the object, because the object being 492 run has to have the data at some particular address. */ 493 HOWTO (R_PPC_COPY, /* type */ 494 0, /* rightshift */ 495 2, /* size (0 = byte, 1 = short, 2 = long) */ 496 32, /* bitsize */ 497 FALSE, /* pc_relative */ 498 0, /* bitpos */ 499 complain_overflow_dont, /* complain_on_overflow */ 500 ppc_elf_unhandled_reloc, /* special_function */ 501 "R_PPC_COPY", /* name */ 502 FALSE, /* partial_inplace */ 503 0, /* src_mask */ 504 0, /* dst_mask */ 505 FALSE), /* pcrel_offset */ 506 507 /* Like R_PPC_ADDR32, but used when setting global offset table 508 entries. */ 509 HOWTO (R_PPC_GLOB_DAT, /* type */ 510 0, /* rightshift */ 511 2, /* size (0 = byte, 1 = short, 2 = long) */ 512 32, /* bitsize */ 513 FALSE, /* pc_relative */ 514 0, /* bitpos */ 515 complain_overflow_dont, /* complain_on_overflow */ 516 ppc_elf_unhandled_reloc, /* special_function */ 517 "R_PPC_GLOB_DAT", /* name */ 518 FALSE, /* partial_inplace */ 519 0, /* src_mask */ 520 0xffffffff, /* dst_mask */ 521 FALSE), /* pcrel_offset */ 522 523 /* Marks a procedure linkage table entry for a symbol. */ 524 HOWTO (R_PPC_JMP_SLOT, /* type */ 525 0, /* rightshift */ 526 2, /* size (0 = byte, 1 = short, 2 = long) */ 527 32, /* bitsize */ 528 FALSE, /* pc_relative */ 529 0, /* bitpos */ 530 complain_overflow_dont, /* complain_on_overflow */ 531 ppc_elf_unhandled_reloc, /* special_function */ 532 "R_PPC_JMP_SLOT", /* name */ 533 FALSE, /* partial_inplace */ 534 0, /* src_mask */ 535 0, /* dst_mask */ 536 FALSE), /* pcrel_offset */ 537 538 /* Used only by the dynamic linker. When the object is run, this 539 longword is set to the load address of the object, plus the 540 addend. */ 541 HOWTO (R_PPC_RELATIVE, /* type */ 542 0, /* rightshift */ 543 2, /* size (0 = byte, 1 = short, 2 = long) */ 544 32, /* bitsize */ 545 FALSE, /* pc_relative */ 546 0, /* bitpos */ 547 complain_overflow_dont, /* complain_on_overflow */ 548 bfd_elf_generic_reloc, /* special_function */ 549 "R_PPC_RELATIVE", /* name */ 550 FALSE, /* partial_inplace */ 551 0, /* src_mask */ 552 0xffffffff, /* dst_mask */ 553 FALSE), /* pcrel_offset */ 554 555 /* Like R_PPC_REL24, but uses the value of the symbol within the 556 object rather than the final value. Normally used for 557 _GLOBAL_OFFSET_TABLE_. */ 558 HOWTO (R_PPC_LOCAL24PC, /* type */ 559 0, /* rightshift */ 560 2, /* size (0 = byte, 1 = short, 2 = long) */ 561 26, /* bitsize */ 562 TRUE, /* pc_relative */ 563 0, /* bitpos */ 564 complain_overflow_signed, /* complain_on_overflow */ 565 bfd_elf_generic_reloc, /* special_function */ 566 "R_PPC_LOCAL24PC", /* name */ 567 FALSE, /* partial_inplace */ 568 0, /* src_mask */ 569 0x3fffffc, /* dst_mask */ 570 TRUE), /* pcrel_offset */ 571 572 /* Like R_PPC_ADDR32, but may be unaligned. */ 573 HOWTO (R_PPC_UADDR32, /* type */ 574 0, /* rightshift */ 575 2, /* size (0 = byte, 1 = short, 2 = long) */ 576 32, /* bitsize */ 577 FALSE, /* pc_relative */ 578 0, /* bitpos */ 579 complain_overflow_dont, /* complain_on_overflow */ 580 bfd_elf_generic_reloc, /* special_function */ 581 "R_PPC_UADDR32", /* name */ 582 FALSE, /* partial_inplace */ 583 0, /* src_mask */ 584 0xffffffff, /* dst_mask */ 585 FALSE), /* pcrel_offset */ 586 587 /* Like R_PPC_ADDR16, but may be unaligned. */ 588 HOWTO (R_PPC_UADDR16, /* type */ 589 0, /* rightshift */ 590 1, /* size (0 = byte, 1 = short, 2 = long) */ 591 16, /* bitsize */ 592 FALSE, /* pc_relative */ 593 0, /* bitpos */ 594 complain_overflow_bitfield, /* complain_on_overflow */ 595 bfd_elf_generic_reloc, /* special_function */ 596 "R_PPC_UADDR16", /* name */ 597 FALSE, /* partial_inplace */ 598 0, /* src_mask */ 599 0xffff, /* dst_mask */ 600 FALSE), /* pcrel_offset */ 601 602 /* 32-bit PC relative */ 603 HOWTO (R_PPC_REL32, /* type */ 604 0, /* rightshift */ 605 2, /* size (0 = byte, 1 = short, 2 = long) */ 606 32, /* bitsize */ 607 TRUE, /* pc_relative */ 608 0, /* bitpos */ 609 complain_overflow_dont, /* complain_on_overflow */ 610 bfd_elf_generic_reloc, /* special_function */ 611 "R_PPC_REL32", /* name */ 612 FALSE, /* partial_inplace */ 613 0, /* src_mask */ 614 0xffffffff, /* dst_mask */ 615 TRUE), /* pcrel_offset */ 616 617 /* 32-bit relocation to the symbol's procedure linkage table. 618 FIXME: not supported. */ 619 HOWTO (R_PPC_PLT32, /* type */ 620 0, /* rightshift */ 621 2, /* size (0 = byte, 1 = short, 2 = long) */ 622 32, /* bitsize */ 623 FALSE, /* pc_relative */ 624 0, /* bitpos */ 625 complain_overflow_dont, /* complain_on_overflow */ 626 ppc_elf_unhandled_reloc, /* special_function */ 627 "R_PPC_PLT32", /* name */ 628 FALSE, /* partial_inplace */ 629 0, /* src_mask */ 630 0, /* dst_mask */ 631 FALSE), /* pcrel_offset */ 632 633 /* 32-bit PC relative relocation to the symbol's procedure linkage table. 634 FIXME: not supported. */ 635 HOWTO (R_PPC_PLTREL32, /* type */ 636 0, /* rightshift */ 637 2, /* size (0 = byte, 1 = short, 2 = long) */ 638 32, /* bitsize */ 639 TRUE, /* pc_relative */ 640 0, /* bitpos */ 641 complain_overflow_dont, /* complain_on_overflow */ 642 ppc_elf_unhandled_reloc, /* special_function */ 643 "R_PPC_PLTREL32", /* name */ 644 FALSE, /* partial_inplace */ 645 0, /* src_mask */ 646 0, /* dst_mask */ 647 TRUE), /* pcrel_offset */ 648 649 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for 650 the symbol. */ 651 HOWTO (R_PPC_PLT16_LO, /* type */ 652 0, /* rightshift */ 653 1, /* size (0 = byte, 1 = short, 2 = long) */ 654 16, /* bitsize */ 655 FALSE, /* pc_relative */ 656 0, /* bitpos */ 657 complain_overflow_dont, /* complain_on_overflow */ 658 ppc_elf_unhandled_reloc, /* special_function */ 659 "R_PPC_PLT16_LO", /* name */ 660 FALSE, /* partial_inplace */ 661 0, /* src_mask */ 662 0xffff, /* dst_mask */ 663 FALSE), /* pcrel_offset */ 664 665 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for 666 the symbol. */ 667 HOWTO (R_PPC_PLT16_HI, /* type */ 668 16, /* rightshift */ 669 1, /* size (0 = byte, 1 = short, 2 = long) */ 670 16, /* bitsize */ 671 FALSE, /* pc_relative */ 672 0, /* bitpos */ 673 complain_overflow_dont, /* complain_on_overflow */ 674 ppc_elf_unhandled_reloc, /* special_function */ 675 "R_PPC_PLT16_HI", /* name */ 676 FALSE, /* partial_inplace */ 677 0, /* src_mask */ 678 0xffff, /* dst_mask */ 679 FALSE), /* pcrel_offset */ 680 681 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for 682 the symbol. */ 683 HOWTO (R_PPC_PLT16_HA, /* type */ 684 16, /* rightshift */ 685 1, /* size (0 = byte, 1 = short, 2 = long) */ 686 16, /* bitsize */ 687 FALSE, /* pc_relative */ 688 0, /* bitpos */ 689 complain_overflow_dont, /* complain_on_overflow */ 690 ppc_elf_unhandled_reloc, /* special_function */ 691 "R_PPC_PLT16_HA", /* name */ 692 FALSE, /* partial_inplace */ 693 0, /* src_mask */ 694 0xffff, /* dst_mask */ 695 FALSE), /* pcrel_offset */ 696 697 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with 698 small data items. */ 699 HOWTO (R_PPC_SDAREL16, /* type */ 700 0, /* rightshift */ 701 1, /* size (0 = byte, 1 = short, 2 = long) */ 702 16, /* bitsize */ 703 FALSE, /* pc_relative */ 704 0, /* bitpos */ 705 complain_overflow_signed, /* complain_on_overflow */ 706 ppc_elf_unhandled_reloc, /* special_function */ 707 "R_PPC_SDAREL16", /* name */ 708 FALSE, /* partial_inplace */ 709 0, /* src_mask */ 710 0xffff, /* dst_mask */ 711 FALSE), /* pcrel_offset */ 712 713 /* 16-bit section relative relocation. */ 714 HOWTO (R_PPC_SECTOFF, /* type */ 715 0, /* rightshift */ 716 1, /* size (0 = byte, 1 = short, 2 = long) */ 717 16, /* bitsize */ 718 FALSE, /* pc_relative */ 719 0, /* bitpos */ 720 complain_overflow_signed, /* complain_on_overflow */ 721 ppc_elf_unhandled_reloc, /* special_function */ 722 "R_PPC_SECTOFF", /* name */ 723 FALSE, /* partial_inplace */ 724 0, /* src_mask */ 725 0xffff, /* dst_mask */ 726 FALSE), /* pcrel_offset */ 727 728 /* 16-bit lower half section relative relocation. */ 729 HOWTO (R_PPC_SECTOFF_LO, /* type */ 730 0, /* rightshift */ 731 1, /* size (0 = byte, 1 = short, 2 = long) */ 732 16, /* bitsize */ 733 FALSE, /* pc_relative */ 734 0, /* bitpos */ 735 complain_overflow_dont, /* complain_on_overflow */ 736 ppc_elf_unhandled_reloc, /* special_function */ 737 "R_PPC_SECTOFF_LO", /* name */ 738 FALSE, /* partial_inplace */ 739 0, /* src_mask */ 740 0xffff, /* dst_mask */ 741 FALSE), /* pcrel_offset */ 742 743 /* 16-bit upper half section relative relocation. */ 744 HOWTO (R_PPC_SECTOFF_HI, /* type */ 745 16, /* rightshift */ 746 1, /* size (0 = byte, 1 = short, 2 = long) */ 747 16, /* bitsize */ 748 FALSE, /* pc_relative */ 749 0, /* bitpos */ 750 complain_overflow_dont, /* complain_on_overflow */ 751 ppc_elf_unhandled_reloc, /* special_function */ 752 "R_PPC_SECTOFF_HI", /* name */ 753 FALSE, /* partial_inplace */ 754 0, /* src_mask */ 755 0xffff, /* dst_mask */ 756 FALSE), /* pcrel_offset */ 757 758 /* 16-bit upper half adjusted section relative relocation. */ 759 HOWTO (R_PPC_SECTOFF_HA, /* type */ 760 16, /* rightshift */ 761 1, /* size (0 = byte, 1 = short, 2 = long) */ 762 16, /* bitsize */ 763 FALSE, /* pc_relative */ 764 0, /* bitpos */ 765 complain_overflow_dont, /* complain_on_overflow */ 766 ppc_elf_unhandled_reloc, /* special_function */ 767 "R_PPC_SECTOFF_HA", /* name */ 768 FALSE, /* partial_inplace */ 769 0, /* src_mask */ 770 0xffff, /* dst_mask */ 771 FALSE), /* pcrel_offset */ 772 773 /* Marker relocs for TLS. */ 774 HOWTO (R_PPC_TLS, 775 0, /* rightshift */ 776 2, /* size (0 = byte, 1 = short, 2 = long) */ 777 32, /* bitsize */ 778 FALSE, /* pc_relative */ 779 0, /* bitpos */ 780 complain_overflow_dont, /* complain_on_overflow */ 781 bfd_elf_generic_reloc, /* special_function */ 782 "R_PPC_TLS", /* name */ 783 FALSE, /* partial_inplace */ 784 0, /* src_mask */ 785 0, /* dst_mask */ 786 FALSE), /* pcrel_offset */ 787 788 HOWTO (R_PPC_TLSGD, 789 0, /* rightshift */ 790 2, /* size (0 = byte, 1 = short, 2 = long) */ 791 32, /* bitsize */ 792 FALSE, /* pc_relative */ 793 0, /* bitpos */ 794 complain_overflow_dont, /* complain_on_overflow */ 795 bfd_elf_generic_reloc, /* special_function */ 796 "R_PPC_TLSGD", /* name */ 797 FALSE, /* partial_inplace */ 798 0, /* src_mask */ 799 0, /* dst_mask */ 800 FALSE), /* pcrel_offset */ 801 802 HOWTO (R_PPC_TLSLD, 803 0, /* rightshift */ 804 2, /* size (0 = byte, 1 = short, 2 = long) */ 805 32, /* bitsize */ 806 FALSE, /* pc_relative */ 807 0, /* bitpos */ 808 complain_overflow_dont, /* complain_on_overflow */ 809 bfd_elf_generic_reloc, /* special_function */ 810 "R_PPC_TLSLD", /* name */ 811 FALSE, /* partial_inplace */ 812 0, /* src_mask */ 813 0, /* dst_mask */ 814 FALSE), /* pcrel_offset */ 815 816 /* Computes the load module index of the load module that contains the 817 definition of its TLS sym. */ 818 HOWTO (R_PPC_DTPMOD32, 819 0, /* rightshift */ 820 2, /* size (0 = byte, 1 = short, 2 = long) */ 821 32, /* bitsize */ 822 FALSE, /* pc_relative */ 823 0, /* bitpos */ 824 complain_overflow_dont, /* complain_on_overflow */ 825 ppc_elf_unhandled_reloc, /* special_function */ 826 "R_PPC_DTPMOD32", /* name */ 827 FALSE, /* partial_inplace */ 828 0, /* src_mask */ 829 0xffffffff, /* dst_mask */ 830 FALSE), /* pcrel_offset */ 831 832 /* Computes a dtv-relative displacement, the difference between the value 833 of sym+add and the base address of the thread-local storage block that 834 contains the definition of sym, minus 0x8000. */ 835 HOWTO (R_PPC_DTPREL32, 836 0, /* rightshift */ 837 2, /* size (0 = byte, 1 = short, 2 = long) */ 838 32, /* bitsize */ 839 FALSE, /* pc_relative */ 840 0, /* bitpos */ 841 complain_overflow_dont, /* complain_on_overflow */ 842 ppc_elf_unhandled_reloc, /* special_function */ 843 "R_PPC_DTPREL32", /* name */ 844 FALSE, /* partial_inplace */ 845 0, /* src_mask */ 846 0xffffffff, /* dst_mask */ 847 FALSE), /* pcrel_offset */ 848 849 /* A 16 bit dtprel reloc. */ 850 HOWTO (R_PPC_DTPREL16, 851 0, /* rightshift */ 852 1, /* size (0 = byte, 1 = short, 2 = long) */ 853 16, /* bitsize */ 854 FALSE, /* pc_relative */ 855 0, /* bitpos */ 856 complain_overflow_signed, /* complain_on_overflow */ 857 ppc_elf_unhandled_reloc, /* special_function */ 858 "R_PPC_DTPREL16", /* name */ 859 FALSE, /* partial_inplace */ 860 0, /* src_mask */ 861 0xffff, /* dst_mask */ 862 FALSE), /* pcrel_offset */ 863 864 /* Like DTPREL16, but no overflow. */ 865 HOWTO (R_PPC_DTPREL16_LO, 866 0, /* rightshift */ 867 1, /* size (0 = byte, 1 = short, 2 = long) */ 868 16, /* bitsize */ 869 FALSE, /* pc_relative */ 870 0, /* bitpos */ 871 complain_overflow_dont, /* complain_on_overflow */ 872 ppc_elf_unhandled_reloc, /* special_function */ 873 "R_PPC_DTPREL16_LO", /* name */ 874 FALSE, /* partial_inplace */ 875 0, /* src_mask */ 876 0xffff, /* dst_mask */ 877 FALSE), /* pcrel_offset */ 878 879 /* Like DTPREL16_LO, but next higher group of 16 bits. */ 880 HOWTO (R_PPC_DTPREL16_HI, 881 16, /* rightshift */ 882 1, /* size (0 = byte, 1 = short, 2 = long) */ 883 16, /* bitsize */ 884 FALSE, /* pc_relative */ 885 0, /* bitpos */ 886 complain_overflow_dont, /* complain_on_overflow */ 887 ppc_elf_unhandled_reloc, /* special_function */ 888 "R_PPC_DTPREL16_HI", /* name */ 889 FALSE, /* partial_inplace */ 890 0, /* src_mask */ 891 0xffff, /* dst_mask */ 892 FALSE), /* pcrel_offset */ 893 894 /* Like DTPREL16_HI, but adjust for low 16 bits. */ 895 HOWTO (R_PPC_DTPREL16_HA, 896 16, /* rightshift */ 897 1, /* size (0 = byte, 1 = short, 2 = long) */ 898 16, /* bitsize */ 899 FALSE, /* pc_relative */ 900 0, /* bitpos */ 901 complain_overflow_dont, /* complain_on_overflow */ 902 ppc_elf_unhandled_reloc, /* special_function */ 903 "R_PPC_DTPREL16_HA", /* name */ 904 FALSE, /* partial_inplace */ 905 0, /* src_mask */ 906 0xffff, /* dst_mask */ 907 FALSE), /* pcrel_offset */ 908 909 /* Computes a tp-relative displacement, the difference between the value of 910 sym+add and the value of the thread pointer (r13). */ 911 HOWTO (R_PPC_TPREL32, 912 0, /* rightshift */ 913 2, /* size (0 = byte, 1 = short, 2 = long) */ 914 32, /* bitsize */ 915 FALSE, /* pc_relative */ 916 0, /* bitpos */ 917 complain_overflow_dont, /* complain_on_overflow */ 918 ppc_elf_unhandled_reloc, /* special_function */ 919 "R_PPC_TPREL32", /* name */ 920 FALSE, /* partial_inplace */ 921 0, /* src_mask */ 922 0xffffffff, /* dst_mask */ 923 FALSE), /* pcrel_offset */ 924 925 /* A 16 bit tprel reloc. */ 926 HOWTO (R_PPC_TPREL16, 927 0, /* rightshift */ 928 1, /* size (0 = byte, 1 = short, 2 = long) */ 929 16, /* bitsize */ 930 FALSE, /* pc_relative */ 931 0, /* bitpos */ 932 complain_overflow_signed, /* complain_on_overflow */ 933 ppc_elf_unhandled_reloc, /* special_function */ 934 "R_PPC_TPREL16", /* name */ 935 FALSE, /* partial_inplace */ 936 0, /* src_mask */ 937 0xffff, /* dst_mask */ 938 FALSE), /* pcrel_offset */ 939 940 /* Like TPREL16, but no overflow. */ 941 HOWTO (R_PPC_TPREL16_LO, 942 0, /* rightshift */ 943 1, /* size (0 = byte, 1 = short, 2 = long) */ 944 16, /* bitsize */ 945 FALSE, /* pc_relative */ 946 0, /* bitpos */ 947 complain_overflow_dont, /* complain_on_overflow */ 948 ppc_elf_unhandled_reloc, /* special_function */ 949 "R_PPC_TPREL16_LO", /* name */ 950 FALSE, /* partial_inplace */ 951 0, /* src_mask */ 952 0xffff, /* dst_mask */ 953 FALSE), /* pcrel_offset */ 954 955 /* Like TPREL16_LO, but next higher group of 16 bits. */ 956 HOWTO (R_PPC_TPREL16_HI, 957 16, /* rightshift */ 958 1, /* size (0 = byte, 1 = short, 2 = long) */ 959 16, /* bitsize */ 960 FALSE, /* pc_relative */ 961 0, /* bitpos */ 962 complain_overflow_dont, /* complain_on_overflow */ 963 ppc_elf_unhandled_reloc, /* special_function */ 964 "R_PPC_TPREL16_HI", /* name */ 965 FALSE, /* partial_inplace */ 966 0, /* src_mask */ 967 0xffff, /* dst_mask */ 968 FALSE), /* pcrel_offset */ 969 970 /* Like TPREL16_HI, but adjust for low 16 bits. */ 971 HOWTO (R_PPC_TPREL16_HA, 972 16, /* rightshift */ 973 1, /* size (0 = byte, 1 = short, 2 = long) */ 974 16, /* bitsize */ 975 FALSE, /* pc_relative */ 976 0, /* bitpos */ 977 complain_overflow_dont, /* complain_on_overflow */ 978 ppc_elf_unhandled_reloc, /* special_function */ 979 "R_PPC_TPREL16_HA", /* name */ 980 FALSE, /* partial_inplace */ 981 0, /* src_mask */ 982 0xffff, /* dst_mask */ 983 FALSE), /* pcrel_offset */ 984 985 /* Allocates two contiguous entries in the GOT to hold a tls_index structure, 986 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset 987 to the first entry. */ 988 HOWTO (R_PPC_GOT_TLSGD16, 989 0, /* rightshift */ 990 1, /* size (0 = byte, 1 = short, 2 = long) */ 991 16, /* bitsize */ 992 FALSE, /* pc_relative */ 993 0, /* bitpos */ 994 complain_overflow_signed, /* complain_on_overflow */ 995 ppc_elf_unhandled_reloc, /* special_function */ 996 "R_PPC_GOT_TLSGD16", /* name */ 997 FALSE, /* partial_inplace */ 998 0, /* src_mask */ 999 0xffff, /* dst_mask */ 1000 FALSE), /* pcrel_offset */ 1001 1002 /* Like GOT_TLSGD16, but no overflow. */ 1003 HOWTO (R_PPC_GOT_TLSGD16_LO, 1004 0, /* rightshift */ 1005 1, /* size (0 = byte, 1 = short, 2 = long) */ 1006 16, /* bitsize */ 1007 FALSE, /* pc_relative */ 1008 0, /* bitpos */ 1009 complain_overflow_dont, /* complain_on_overflow */ 1010 ppc_elf_unhandled_reloc, /* special_function */ 1011 "R_PPC_GOT_TLSGD16_LO", /* name */ 1012 FALSE, /* partial_inplace */ 1013 0, /* src_mask */ 1014 0xffff, /* dst_mask */ 1015 FALSE), /* pcrel_offset */ 1016 1017 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */ 1018 HOWTO (R_PPC_GOT_TLSGD16_HI, 1019 16, /* rightshift */ 1020 1, /* size (0 = byte, 1 = short, 2 = long) */ 1021 16, /* bitsize */ 1022 FALSE, /* pc_relative */ 1023 0, /* bitpos */ 1024 complain_overflow_dont, /* complain_on_overflow */ 1025 ppc_elf_unhandled_reloc, /* special_function */ 1026 "R_PPC_GOT_TLSGD16_HI", /* name */ 1027 FALSE, /* partial_inplace */ 1028 0, /* src_mask */ 1029 0xffff, /* dst_mask */ 1030 FALSE), /* pcrel_offset */ 1031 1032 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */ 1033 HOWTO (R_PPC_GOT_TLSGD16_HA, 1034 16, /* rightshift */ 1035 1, /* size (0 = byte, 1 = short, 2 = long) */ 1036 16, /* bitsize */ 1037 FALSE, /* pc_relative */ 1038 0, /* bitpos */ 1039 complain_overflow_dont, /* complain_on_overflow */ 1040 ppc_elf_unhandled_reloc, /* special_function */ 1041 "R_PPC_GOT_TLSGD16_HA", /* name */ 1042 FALSE, /* partial_inplace */ 1043 0, /* src_mask */ 1044 0xffff, /* dst_mask */ 1045 FALSE), /* pcrel_offset */ 1046 1047 /* Allocates two contiguous entries in the GOT to hold a tls_index structure, 1048 with values (sym+add)@dtpmod and zero, and computes the offset to the 1049 first entry. */ 1050 HOWTO (R_PPC_GOT_TLSLD16, 1051 0, /* rightshift */ 1052 1, /* size (0 = byte, 1 = short, 2 = long) */ 1053 16, /* bitsize */ 1054 FALSE, /* pc_relative */ 1055 0, /* bitpos */ 1056 complain_overflow_signed, /* complain_on_overflow */ 1057 ppc_elf_unhandled_reloc, /* special_function */ 1058 "R_PPC_GOT_TLSLD16", /* name */ 1059 FALSE, /* partial_inplace */ 1060 0, /* src_mask */ 1061 0xffff, /* dst_mask */ 1062 FALSE), /* pcrel_offset */ 1063 1064 /* Like GOT_TLSLD16, but no overflow. */ 1065 HOWTO (R_PPC_GOT_TLSLD16_LO, 1066 0, /* rightshift */ 1067 1, /* size (0 = byte, 1 = short, 2 = long) */ 1068 16, /* bitsize */ 1069 FALSE, /* pc_relative */ 1070 0, /* bitpos */ 1071 complain_overflow_dont, /* complain_on_overflow */ 1072 ppc_elf_unhandled_reloc, /* special_function */ 1073 "R_PPC_GOT_TLSLD16_LO", /* name */ 1074 FALSE, /* partial_inplace */ 1075 0, /* src_mask */ 1076 0xffff, /* dst_mask */ 1077 FALSE), /* pcrel_offset */ 1078 1079 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */ 1080 HOWTO (R_PPC_GOT_TLSLD16_HI, 1081 16, /* rightshift */ 1082 1, /* size (0 = byte, 1 = short, 2 = long) */ 1083 16, /* bitsize */ 1084 FALSE, /* pc_relative */ 1085 0, /* bitpos */ 1086 complain_overflow_dont, /* complain_on_overflow */ 1087 ppc_elf_unhandled_reloc, /* special_function */ 1088 "R_PPC_GOT_TLSLD16_HI", /* name */ 1089 FALSE, /* partial_inplace */ 1090 0, /* src_mask */ 1091 0xffff, /* dst_mask */ 1092 FALSE), /* pcrel_offset */ 1093 1094 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */ 1095 HOWTO (R_PPC_GOT_TLSLD16_HA, 1096 16, /* rightshift */ 1097 1, /* size (0 = byte, 1 = short, 2 = long) */ 1098 16, /* bitsize */ 1099 FALSE, /* pc_relative */ 1100 0, /* bitpos */ 1101 complain_overflow_dont, /* complain_on_overflow */ 1102 ppc_elf_unhandled_reloc, /* special_function */ 1103 "R_PPC_GOT_TLSLD16_HA", /* name */ 1104 FALSE, /* partial_inplace */ 1105 0, /* src_mask */ 1106 0xffff, /* dst_mask */ 1107 FALSE), /* pcrel_offset */ 1108 1109 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes 1110 the offset to the entry. */ 1111 HOWTO (R_PPC_GOT_DTPREL16, 1112 0, /* rightshift */ 1113 1, /* size (0 = byte, 1 = short, 2 = long) */ 1114 16, /* bitsize */ 1115 FALSE, /* pc_relative */ 1116 0, /* bitpos */ 1117 complain_overflow_signed, /* complain_on_overflow */ 1118 ppc_elf_unhandled_reloc, /* special_function */ 1119 "R_PPC_GOT_DTPREL16", /* name */ 1120 FALSE, /* partial_inplace */ 1121 0, /* src_mask */ 1122 0xffff, /* dst_mask */ 1123 FALSE), /* pcrel_offset */ 1124 1125 /* Like GOT_DTPREL16, but no overflow. */ 1126 HOWTO (R_PPC_GOT_DTPREL16_LO, 1127 0, /* rightshift */ 1128 1, /* size (0 = byte, 1 = short, 2 = long) */ 1129 16, /* bitsize */ 1130 FALSE, /* pc_relative */ 1131 0, /* bitpos */ 1132 complain_overflow_dont, /* complain_on_overflow */ 1133 ppc_elf_unhandled_reloc, /* special_function */ 1134 "R_PPC_GOT_DTPREL16_LO", /* name */ 1135 FALSE, /* partial_inplace */ 1136 0, /* src_mask */ 1137 0xffff, /* dst_mask */ 1138 FALSE), /* pcrel_offset */ 1139 1140 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */ 1141 HOWTO (R_PPC_GOT_DTPREL16_HI, 1142 16, /* rightshift */ 1143 1, /* size (0 = byte, 1 = short, 2 = long) */ 1144 16, /* bitsize */ 1145 FALSE, /* pc_relative */ 1146 0, /* bitpos */ 1147 complain_overflow_dont, /* complain_on_overflow */ 1148 ppc_elf_unhandled_reloc, /* special_function */ 1149 "R_PPC_GOT_DTPREL16_HI", /* name */ 1150 FALSE, /* partial_inplace */ 1151 0, /* src_mask */ 1152 0xffff, /* dst_mask */ 1153 FALSE), /* pcrel_offset */ 1154 1155 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */ 1156 HOWTO (R_PPC_GOT_DTPREL16_HA, 1157 16, /* rightshift */ 1158 1, /* size (0 = byte, 1 = short, 2 = long) */ 1159 16, /* bitsize */ 1160 FALSE, /* pc_relative */ 1161 0, /* bitpos */ 1162 complain_overflow_dont, /* complain_on_overflow */ 1163 ppc_elf_unhandled_reloc, /* special_function */ 1164 "R_PPC_GOT_DTPREL16_HA", /* name */ 1165 FALSE, /* partial_inplace */ 1166 0, /* src_mask */ 1167 0xffff, /* dst_mask */ 1168 FALSE), /* pcrel_offset */ 1169 1170 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the 1171 offset to the entry. */ 1172 HOWTO (R_PPC_GOT_TPREL16, 1173 0, /* rightshift */ 1174 1, /* size (0 = byte, 1 = short, 2 = long) */ 1175 16, /* bitsize */ 1176 FALSE, /* pc_relative */ 1177 0, /* bitpos */ 1178 complain_overflow_signed, /* complain_on_overflow */ 1179 ppc_elf_unhandled_reloc, /* special_function */ 1180 "R_PPC_GOT_TPREL16", /* name */ 1181 FALSE, /* partial_inplace */ 1182 0, /* src_mask */ 1183 0xffff, /* dst_mask */ 1184 FALSE), /* pcrel_offset */ 1185 1186 /* Like GOT_TPREL16, but no overflow. */ 1187 HOWTO (R_PPC_GOT_TPREL16_LO, 1188 0, /* rightshift */ 1189 1, /* size (0 = byte, 1 = short, 2 = long) */ 1190 16, /* bitsize */ 1191 FALSE, /* pc_relative */ 1192 0, /* bitpos */ 1193 complain_overflow_dont, /* complain_on_overflow */ 1194 ppc_elf_unhandled_reloc, /* special_function */ 1195 "R_PPC_GOT_TPREL16_LO", /* name */ 1196 FALSE, /* partial_inplace */ 1197 0, /* src_mask */ 1198 0xffff, /* dst_mask */ 1199 FALSE), /* pcrel_offset */ 1200 1201 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */ 1202 HOWTO (R_PPC_GOT_TPREL16_HI, 1203 16, /* rightshift */ 1204 1, /* size (0 = byte, 1 = short, 2 = long) */ 1205 16, /* bitsize */ 1206 FALSE, /* pc_relative */ 1207 0, /* bitpos */ 1208 complain_overflow_dont, /* complain_on_overflow */ 1209 ppc_elf_unhandled_reloc, /* special_function */ 1210 "R_PPC_GOT_TPREL16_HI", /* name */ 1211 FALSE, /* partial_inplace */ 1212 0, /* src_mask */ 1213 0xffff, /* dst_mask */ 1214 FALSE), /* pcrel_offset */ 1215 1216 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */ 1217 HOWTO (R_PPC_GOT_TPREL16_HA, 1218 16, /* rightshift */ 1219 1, /* size (0 = byte, 1 = short, 2 = long) */ 1220 16, /* bitsize */ 1221 FALSE, /* pc_relative */ 1222 0, /* bitpos */ 1223 complain_overflow_dont, /* complain_on_overflow */ 1224 ppc_elf_unhandled_reloc, /* special_function */ 1225 "R_PPC_GOT_TPREL16_HA", /* name */ 1226 FALSE, /* partial_inplace */ 1227 0, /* src_mask */ 1228 0xffff, /* dst_mask */ 1229 FALSE), /* pcrel_offset */ 1230 1231 /* The remaining relocs are from the Embedded ELF ABI, and are not 1232 in the SVR4 ELF ABI. */ 1233 1234 /* 32 bit value resulting from the addend minus the symbol. */ 1235 HOWTO (R_PPC_EMB_NADDR32, /* type */ 1236 0, /* rightshift */ 1237 2, /* size (0 = byte, 1 = short, 2 = long) */ 1238 32, /* bitsize */ 1239 FALSE, /* pc_relative */ 1240 0, /* bitpos */ 1241 complain_overflow_dont, /* complain_on_overflow */ 1242 ppc_elf_unhandled_reloc, /* special_function */ 1243 "R_PPC_EMB_NADDR32", /* name */ 1244 FALSE, /* partial_inplace */ 1245 0, /* src_mask */ 1246 0xffffffff, /* dst_mask */ 1247 FALSE), /* pcrel_offset */ 1248 1249 /* 16 bit value resulting from the addend minus the symbol. */ 1250 HOWTO (R_PPC_EMB_NADDR16, /* type */ 1251 0, /* rightshift */ 1252 1, /* size (0 = byte, 1 = short, 2 = long) */ 1253 16, /* bitsize */ 1254 FALSE, /* pc_relative */ 1255 0, /* bitpos */ 1256 complain_overflow_signed, /* complain_on_overflow */ 1257 ppc_elf_unhandled_reloc, /* special_function */ 1258 "R_PPC_EMB_NADDR16", /* name */ 1259 FALSE, /* partial_inplace */ 1260 0, /* src_mask */ 1261 0xffff, /* dst_mask */ 1262 FALSE), /* pcrel_offset */ 1263 1264 /* 16 bit value resulting from the addend minus the symbol. */ 1265 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */ 1266 0, /* rightshift */ 1267 1, /* size (0 = byte, 1 = short, 2 = long) */ 1268 16, /* bitsize */ 1269 FALSE, /* pc_relative */ 1270 0, /* bitpos */ 1271 complain_overflow_dont,/* complain_on_overflow */ 1272 ppc_elf_unhandled_reloc, /* special_function */ 1273 "R_PPC_EMB_ADDR16_LO", /* name */ 1274 FALSE, /* partial_inplace */ 1275 0, /* src_mask */ 1276 0xffff, /* dst_mask */ 1277 FALSE), /* pcrel_offset */ 1278 1279 /* The high order 16 bits of the addend minus the symbol. */ 1280 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */ 1281 16, /* rightshift */ 1282 1, /* size (0 = byte, 1 = short, 2 = long) */ 1283 16, /* bitsize */ 1284 FALSE, /* pc_relative */ 1285 0, /* bitpos */ 1286 complain_overflow_dont, /* complain_on_overflow */ 1287 ppc_elf_unhandled_reloc, /* special_function */ 1288 "R_PPC_EMB_NADDR16_HI", /* name */ 1289 FALSE, /* partial_inplace */ 1290 0, /* src_mask */ 1291 0xffff, /* dst_mask */ 1292 FALSE), /* pcrel_offset */ 1293 1294 /* The high order 16 bits of the result of the addend minus the address, 1295 plus 1 if the contents of the low 16 bits, treated as a signed number, 1296 is negative. */ 1297 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */ 1298 16, /* rightshift */ 1299 1, /* size (0 = byte, 1 = short, 2 = long) */ 1300 16, /* bitsize */ 1301 FALSE, /* pc_relative */ 1302 0, /* bitpos */ 1303 complain_overflow_dont, /* complain_on_overflow */ 1304 ppc_elf_unhandled_reloc, /* special_function */ 1305 "R_PPC_EMB_NADDR16_HA", /* name */ 1306 FALSE, /* partial_inplace */ 1307 0, /* src_mask */ 1308 0xffff, /* dst_mask */ 1309 FALSE), /* pcrel_offset */ 1310 1311 /* 16 bit value resulting from allocating a 4 byte word to hold an 1312 address in the .sdata section, and returning the offset from 1313 _SDA_BASE_ for that relocation. */ 1314 HOWTO (R_PPC_EMB_SDAI16, /* type */ 1315 0, /* rightshift */ 1316 1, /* size (0 = byte, 1 = short, 2 = long) */ 1317 16, /* bitsize */ 1318 FALSE, /* pc_relative */ 1319 0, /* bitpos */ 1320 complain_overflow_signed, /* complain_on_overflow */ 1321 ppc_elf_unhandled_reloc, /* special_function */ 1322 "R_PPC_EMB_SDAI16", /* name */ 1323 FALSE, /* partial_inplace */ 1324 0, /* src_mask */ 1325 0xffff, /* dst_mask */ 1326 FALSE), /* pcrel_offset */ 1327 1328 /* 16 bit value resulting from allocating a 4 byte word to hold an 1329 address in the .sdata2 section, and returning the offset from 1330 _SDA2_BASE_ for that relocation. */ 1331 HOWTO (R_PPC_EMB_SDA2I16, /* type */ 1332 0, /* rightshift */ 1333 1, /* size (0 = byte, 1 = short, 2 = long) */ 1334 16, /* bitsize */ 1335 FALSE, /* pc_relative */ 1336 0, /* bitpos */ 1337 complain_overflow_signed, /* complain_on_overflow */ 1338 ppc_elf_unhandled_reloc, /* special_function */ 1339 "R_PPC_EMB_SDA2I16", /* name */ 1340 FALSE, /* partial_inplace */ 1341 0, /* src_mask */ 1342 0xffff, /* dst_mask */ 1343 FALSE), /* pcrel_offset */ 1344 1345 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with 1346 small data items. */ 1347 HOWTO (R_PPC_EMB_SDA2REL, /* type */ 1348 0, /* rightshift */ 1349 1, /* size (0 = byte, 1 = short, 2 = long) */ 1350 16, /* bitsize */ 1351 FALSE, /* pc_relative */ 1352 0, /* bitpos */ 1353 complain_overflow_signed, /* complain_on_overflow */ 1354 ppc_elf_unhandled_reloc, /* special_function */ 1355 "R_PPC_EMB_SDA2REL", /* name */ 1356 FALSE, /* partial_inplace */ 1357 0, /* src_mask */ 1358 0xffff, /* dst_mask */ 1359 FALSE), /* pcrel_offset */ 1360 1361 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit 1362 signed offset from the appropriate base, and filling in the register 1363 field with the appropriate register (0, 2, or 13). */ 1364 HOWTO (R_PPC_EMB_SDA21, /* type */ 1365 0, /* rightshift */ 1366 2, /* size (0 = byte, 1 = short, 2 = long) */ 1367 16, /* bitsize */ 1368 FALSE, /* pc_relative */ 1369 0, /* bitpos */ 1370 complain_overflow_signed, /* complain_on_overflow */ 1371 ppc_elf_unhandled_reloc, /* special_function */ 1372 "R_PPC_EMB_SDA21", /* name */ 1373 FALSE, /* partial_inplace */ 1374 0, /* src_mask */ 1375 0xffff, /* dst_mask */ 1376 FALSE), /* pcrel_offset */ 1377 1378 /* Relocation not handled: R_PPC_EMB_MRKREF */ 1379 /* Relocation not handled: R_PPC_EMB_RELSEC16 */ 1380 /* Relocation not handled: R_PPC_EMB_RELST_LO */ 1381 /* Relocation not handled: R_PPC_EMB_RELST_HI */ 1382 /* Relocation not handled: R_PPC_EMB_RELST_HA */ 1383 /* Relocation not handled: R_PPC_EMB_BIT_FLD */ 1384 1385 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling 1386 in the 16 bit signed offset from the appropriate base, and filling in the 1387 register field with the appropriate register (0, 2, or 13). */ 1388 HOWTO (R_PPC_EMB_RELSDA, /* type */ 1389 0, /* rightshift */ 1390 1, /* size (0 = byte, 1 = short, 2 = long) */ 1391 16, /* bitsize */ 1392 FALSE, /* pc_relative */ 1393 0, /* bitpos */ 1394 complain_overflow_signed, /* complain_on_overflow */ 1395 ppc_elf_unhandled_reloc, /* special_function */ 1396 "R_PPC_EMB_RELSDA", /* name */ 1397 FALSE, /* partial_inplace */ 1398 0, /* src_mask */ 1399 0xffff, /* dst_mask */ 1400 FALSE), /* pcrel_offset */ 1401 1402 /* A relative 8 bit branch. */ 1403 HOWTO (R_PPC_VLE_REL8, /* type */ 1404 1, /* rightshift */ 1405 1, /* size (0 = byte, 1 = short, 2 = long) */ 1406 8, /* bitsize */ 1407 TRUE, /* pc_relative */ 1408 0, /* bitpos */ 1409 complain_overflow_signed, /* complain_on_overflow */ 1410 bfd_elf_generic_reloc, /* special_function */ 1411 "R_PPC_VLE_REL8", /* name */ 1412 FALSE, /* partial_inplace */ 1413 0, /* src_mask */ 1414 0xff, /* dst_mask */ 1415 TRUE), /* pcrel_offset */ 1416 1417 /* A relative 15 bit branch. */ 1418 HOWTO (R_PPC_VLE_REL15, /* type */ 1419 1, /* rightshift */ 1420 2, /* size (0 = byte, 1 = short, 2 = long) */ 1421 15, /* bitsize */ 1422 TRUE, /* pc_relative */ 1423 1, /* bitpos */ 1424 complain_overflow_signed, /* complain_on_overflow */ 1425 bfd_elf_generic_reloc, /* special_function */ 1426 "R_PPC_VLE_REL15", /* name */ 1427 FALSE, /* partial_inplace */ 1428 0, /* src_mask */ 1429 0xfffe, /* dst_mask */ 1430 TRUE), /* pcrel_offset */ 1431 1432 /* A relative 24 bit branch. */ 1433 HOWTO (R_PPC_VLE_REL24, /* type */ 1434 1, /* rightshift */ 1435 2, /* size (0 = byte, 1 = short, 2 = long) */ 1436 24, /* bitsize */ 1437 TRUE, /* pc_relative */ 1438 1, /* bitpos */ 1439 complain_overflow_signed, /* complain_on_overflow */ 1440 bfd_elf_generic_reloc, /* special_function */ 1441 "R_PPC_VLE_REL24", /* name */ 1442 FALSE, /* partial_inplace */ 1443 0, /* src_mask */ 1444 0x1fffffe, /* dst_mask */ 1445 TRUE), /* pcrel_offset */ 1446 1447 /* The 16 LSBS in split16a format. */ 1448 HOWTO (R_PPC_VLE_LO16A, /* type */ 1449 0, /* rightshift */ 1450 2, /* size (0 = byte, 1 = short, 2 = long) */ 1451 16, /* bitsize */ 1452 FALSE, /* pc_relative */ 1453 0, /* bitpos */ 1454 complain_overflow_dont, /* complain_on_overflow */ 1455 ppc_elf_unhandled_reloc, /* special_function */ 1456 "R_PPC_VLE_LO16A", /* name */ 1457 FALSE, /* partial_inplace */ 1458 0, /* src_mask */ 1459 0x1f07ff, /* dst_mask */ 1460 FALSE), /* pcrel_offset */ 1461 1462 /* The 16 LSBS in split16d format. */ 1463 HOWTO (R_PPC_VLE_LO16D, /* type */ 1464 0, /* rightshift */ 1465 2, /* size (0 = byte, 1 = short, 2 = long) */ 1466 16, /* bitsize */ 1467 FALSE, /* pc_relative */ 1468 0, /* bitpos */ 1469 complain_overflow_dont, /* complain_on_overflow */ 1470 ppc_elf_unhandled_reloc, /* special_function */ 1471 "R_PPC_VLE_LO16D", /* name */ 1472 FALSE, /* partial_inplace */ 1473 0, /* src_mask */ 1474 0x3e007ff, /* dst_mask */ 1475 FALSE), /* pcrel_offset */ 1476 1477 /* Bits 16-31 split16a format. */ 1478 HOWTO (R_PPC_VLE_HI16A, /* type */ 1479 16, /* rightshift */ 1480 2, /* size (0 = byte, 1 = short, 2 = long) */ 1481 16, /* bitsize */ 1482 FALSE, /* pc_relative */ 1483 0, /* bitpos */ 1484 complain_overflow_dont, /* complain_on_overflow */ 1485 ppc_elf_unhandled_reloc, /* special_function */ 1486 "R_PPC_VLE_HI16A", /* name */ 1487 FALSE, /* partial_inplace */ 1488 0, /* src_mask */ 1489 0x1f07ff, /* dst_mask */ 1490 FALSE), /* pcrel_offset */ 1491 1492 /* Bits 16-31 split16d format. */ 1493 HOWTO (R_PPC_VLE_HI16D, /* type */ 1494 16, /* rightshift */ 1495 2, /* size (0 = byte, 1 = short, 2 = long) */ 1496 16, /* bitsize */ 1497 FALSE, /* pc_relative */ 1498 0, /* bitpos */ 1499 complain_overflow_dont, /* complain_on_overflow */ 1500 ppc_elf_unhandled_reloc, /* special_function */ 1501 "R_PPC_VLE_HI16D", /* name */ 1502 FALSE, /* partial_inplace */ 1503 0, /* src_mask */ 1504 0x3e007ff, /* dst_mask */ 1505 FALSE), /* pcrel_offset */ 1506 1507 /* Bits 16-31 (High Adjusted) in split16a format. */ 1508 HOWTO (R_PPC_VLE_HA16A, /* type */ 1509 16, /* rightshift */ 1510 2, /* size (0 = byte, 1 = short, 2 = long) */ 1511 16, /* bitsize */ 1512 FALSE, /* pc_relative */ 1513 0, /* bitpos */ 1514 complain_overflow_dont, /* complain_on_overflow */ 1515 ppc_elf_unhandled_reloc, /* special_function */ 1516 "R_PPC_VLE_HA16A", /* name */ 1517 FALSE, /* partial_inplace */ 1518 0, /* src_mask */ 1519 0x1f07ff, /* dst_mask */ 1520 FALSE), /* pcrel_offset */ 1521 1522 /* Bits 16-31 (High Adjusted) in split16d format. */ 1523 HOWTO (R_PPC_VLE_HA16D, /* type */ 1524 16, /* rightshift */ 1525 2, /* size (0 = byte, 1 = short, 2 = long) */ 1526 16, /* bitsize */ 1527 FALSE, /* pc_relative */ 1528 0, /* bitpos */ 1529 complain_overflow_dont, /* complain_on_overflow */ 1530 ppc_elf_unhandled_reloc, /* special_function */ 1531 "R_PPC_VLE_HA16D", /* name */ 1532 FALSE, /* partial_inplace */ 1533 0, /* src_mask */ 1534 0x3e007ff, /* dst_mask */ 1535 FALSE), /* pcrel_offset */ 1536 1537 /* This reloc is like R_PPC_EMB_SDA21 but only applies to e_add16i 1538 instructions. If the register base is 0 then the linker changes 1539 the e_add16i to an e_li instruction. */ 1540 HOWTO (R_PPC_VLE_SDA21, /* type */ 1541 0, /* rightshift */ 1542 2, /* size (0 = byte, 1 = short, 2 = long) */ 1543 16, /* bitsize */ 1544 FALSE, /* pc_relative */ 1545 0, /* bitpos */ 1546 complain_overflow_signed, /* complain_on_overflow */ 1547 ppc_elf_unhandled_reloc, /* special_function */ 1548 "R_PPC_VLE_SDA21", /* name */ 1549 FALSE, /* partial_inplace */ 1550 0, /* src_mask */ 1551 0xffff, /* dst_mask */ 1552 FALSE), /* pcrel_offset */ 1553 1554 /* Like R_PPC_VLE_SDA21 but ignore overflow. */ 1555 HOWTO (R_PPC_VLE_SDA21_LO, /* type */ 1556 0, /* rightshift */ 1557 2, /* size (0 = byte, 1 = short, 2 = long) */ 1558 16, /* bitsize */ 1559 FALSE, /* pc_relative */ 1560 0, /* bitpos */ 1561 complain_overflow_dont, /* complain_on_overflow */ 1562 ppc_elf_unhandled_reloc, /* special_function */ 1563 "R_PPC_VLE_SDA21_LO", /* name */ 1564 FALSE, /* partial_inplace */ 1565 0, /* src_mask */ 1566 0xffff, /* dst_mask */ 1567 FALSE), /* pcrel_offset */ 1568 1569 /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */ 1570 HOWTO (R_PPC_VLE_SDAREL_LO16A,/* type */ 1571 0, /* rightshift */ 1572 2, /* size (0 = byte, 1 = short, 2 = long) */ 1573 16, /* bitsize */ 1574 FALSE, /* pc_relative */ 1575 0, /* bitpos */ 1576 complain_overflow_dont, /* complain_on_overflow */ 1577 ppc_elf_unhandled_reloc, /* special_function */ 1578 "R_PPC_VLE_SDAREL_LO16A", /* name */ 1579 FALSE, /* partial_inplace */ 1580 0, /* src_mask */ 1581 0x1f07ff, /* dst_mask */ 1582 FALSE), /* pcrel_offset */ 1583 1584 /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */ 1585 HOWTO (R_PPC_VLE_SDAREL_LO16D, /* type */ 1586 0, /* rightshift */ 1587 2, /* size (0 = byte, 1 = short, 2 = long) */ 1588 16, /* bitsize */ 1589 FALSE, /* pc_relative */ 1590 0, /* bitpos */ 1591 complain_overflow_dont, /* complain_on_overflow */ 1592 ppc_elf_unhandled_reloc, /* special_function */ 1593 "R_PPC_VLE_SDAREL_LO16D", /* name */ 1594 FALSE, /* partial_inplace */ 1595 0, /* src_mask */ 1596 0x3e007ff, /* dst_mask */ 1597 FALSE), /* pcrel_offset */ 1598 1599 /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */ 1600 HOWTO (R_PPC_VLE_SDAREL_HI16A, /* type */ 1601 16, /* rightshift */ 1602 2, /* size (0 = byte, 1 = short, 2 = long) */ 1603 16, /* bitsize */ 1604 FALSE, /* pc_relative */ 1605 0, /* bitpos */ 1606 complain_overflow_dont, /* complain_on_overflow */ 1607 ppc_elf_unhandled_reloc, /* special_function */ 1608 "R_PPC_VLE_SDAREL_HI16A", /* name */ 1609 FALSE, /* partial_inplace */ 1610 0, /* src_mask */ 1611 0x1f07ff, /* dst_mask */ 1612 FALSE), /* pcrel_offset */ 1613 1614 /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */ 1615 HOWTO (R_PPC_VLE_SDAREL_HI16D, /* type */ 1616 16, /* rightshift */ 1617 2, /* size (0 = byte, 1 = short, 2 = long) */ 1618 16, /* bitsize */ 1619 FALSE, /* pc_relative */ 1620 0, /* bitpos */ 1621 complain_overflow_dont, /* complain_on_overflow */ 1622 ppc_elf_unhandled_reloc, /* special_function */ 1623 "R_PPC_VLE_SDAREL_HI16D", /* name */ 1624 FALSE, /* partial_inplace */ 1625 0, /* src_mask */ 1626 0x3e007ff, /* dst_mask */ 1627 FALSE), /* pcrel_offset */ 1628 1629 /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */ 1630 HOWTO (R_PPC_VLE_SDAREL_HA16A, /* type */ 1631 16, /* rightshift */ 1632 2, /* size (0 = byte, 1 = short, 2 = long) */ 1633 16, /* bitsize */ 1634 FALSE, /* pc_relative */ 1635 0, /* bitpos */ 1636 complain_overflow_dont, /* complain_on_overflow */ 1637 ppc_elf_unhandled_reloc, /* special_function */ 1638 "R_PPC_VLE_SDAREL_HA16A", /* name */ 1639 FALSE, /* partial_inplace */ 1640 0, /* src_mask */ 1641 0x1f07ff, /* dst_mask */ 1642 FALSE), /* pcrel_offset */ 1643 1644 /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */ 1645 HOWTO (R_PPC_VLE_SDAREL_HA16D, /* type */ 1646 16, /* rightshift */ 1647 2, /* size (0 = byte, 1 = short, 2 = long) */ 1648 16, /* bitsize */ 1649 FALSE, /* pc_relative */ 1650 0, /* bitpos */ 1651 complain_overflow_dont, /* complain_on_overflow */ 1652 ppc_elf_unhandled_reloc, /* special_function */ 1653 "R_PPC_VLE_SDAREL_HA16D", /* name */ 1654 FALSE, /* partial_inplace */ 1655 0, /* src_mask */ 1656 0x3e007ff, /* dst_mask */ 1657 FALSE), /* pcrel_offset */ 1658 1659 HOWTO (R_PPC_IRELATIVE, /* type */ 1660 0, /* rightshift */ 1661 2, /* size (0 = byte, 1 = short, 2 = long) */ 1662 32, /* bitsize */ 1663 FALSE, /* pc_relative */ 1664 0, /* bitpos */ 1665 complain_overflow_dont, /* complain_on_overflow */ 1666 ppc_elf_unhandled_reloc, /* special_function */ 1667 "R_PPC_IRELATIVE", /* name */ 1668 FALSE, /* partial_inplace */ 1669 0, /* src_mask */ 1670 0xffffffff, /* dst_mask */ 1671 FALSE), /* pcrel_offset */ 1672 1673 /* A 16 bit relative relocation. */ 1674 HOWTO (R_PPC_REL16, /* type */ 1675 0, /* rightshift */ 1676 1, /* size (0 = byte, 1 = short, 2 = long) */ 1677 16, /* bitsize */ 1678 TRUE, /* pc_relative */ 1679 0, /* bitpos */ 1680 complain_overflow_signed, /* complain_on_overflow */ 1681 bfd_elf_generic_reloc, /* special_function */ 1682 "R_PPC_REL16", /* name */ 1683 FALSE, /* partial_inplace */ 1684 0, /* src_mask */ 1685 0xffff, /* dst_mask */ 1686 TRUE), /* pcrel_offset */ 1687 1688 /* A 16 bit relative relocation without overflow. */ 1689 HOWTO (R_PPC_REL16_LO, /* type */ 1690 0, /* rightshift */ 1691 1, /* size (0 = byte, 1 = short, 2 = long) */ 1692 16, /* bitsize */ 1693 TRUE, /* pc_relative */ 1694 0, /* bitpos */ 1695 complain_overflow_dont,/* complain_on_overflow */ 1696 bfd_elf_generic_reloc, /* special_function */ 1697 "R_PPC_REL16_LO", /* name */ 1698 FALSE, /* partial_inplace */ 1699 0, /* src_mask */ 1700 0xffff, /* dst_mask */ 1701 TRUE), /* pcrel_offset */ 1702 1703 /* The high order 16 bits of a relative address. */ 1704 HOWTO (R_PPC_REL16_HI, /* type */ 1705 16, /* rightshift */ 1706 1, /* size (0 = byte, 1 = short, 2 = long) */ 1707 16, /* bitsize */ 1708 TRUE, /* pc_relative */ 1709 0, /* bitpos */ 1710 complain_overflow_dont, /* complain_on_overflow */ 1711 bfd_elf_generic_reloc, /* special_function */ 1712 "R_PPC_REL16_HI", /* name */ 1713 FALSE, /* partial_inplace */ 1714 0, /* src_mask */ 1715 0xffff, /* dst_mask */ 1716 TRUE), /* pcrel_offset */ 1717 1718 /* The high order 16 bits of a relative address, plus 1 if the contents of 1719 the low 16 bits, treated as a signed number, is negative. */ 1720 HOWTO (R_PPC_REL16_HA, /* type */ 1721 16, /* rightshift */ 1722 1, /* size (0 = byte, 1 = short, 2 = long) */ 1723 16, /* bitsize */ 1724 TRUE, /* pc_relative */ 1725 0, /* bitpos */ 1726 complain_overflow_dont, /* complain_on_overflow */ 1727 ppc_elf_addr16_ha_reloc, /* special_function */ 1728 "R_PPC_REL16_HA", /* name */ 1729 FALSE, /* partial_inplace */ 1730 0, /* src_mask */ 1731 0xffff, /* dst_mask */ 1732 TRUE), /* pcrel_offset */ 1733 1734 /* Like R_PPC_REL16_HA but for split field in addpcis. */ 1735 HOWTO (R_PPC_REL16DX_HA, /* type */ 1736 16, /* rightshift */ 1737 2, /* size (0 = byte, 1 = short, 2 = long) */ 1738 16, /* bitsize */ 1739 TRUE, /* pc_relative */ 1740 0, /* bitpos */ 1741 complain_overflow_signed, /* complain_on_overflow */ 1742 ppc_elf_addr16_ha_reloc, /* special_function */ 1743 "R_PPC_REL16DX_HA", /* name */ 1744 FALSE, /* partial_inplace */ 1745 0, /* src_mask */ 1746 0x1fffc1, /* dst_mask */ 1747 TRUE), /* pcrel_offset */ 1748 1749 /* A split-field reloc for addpcis, non-relative (gas internal use only). */ 1750 HOWTO (R_PPC_16DX_HA, /* type */ 1751 16, /* rightshift */ 1752 2, /* size (0 = byte, 1 = short, 2 = long) */ 1753 16, /* bitsize */ 1754 FALSE, /* pc_relative */ 1755 0, /* bitpos */ 1756 complain_overflow_signed, /* complain_on_overflow */ 1757 ppc_elf_addr16_ha_reloc, /* special_function */ 1758 "R_PPC_16DX_HA", /* name */ 1759 FALSE, /* partial_inplace */ 1760 0, /* src_mask */ 1761 0x1fffc1, /* dst_mask */ 1762 FALSE), /* pcrel_offset */ 1763 1764 /* GNU extension to record C++ vtable hierarchy. */ 1765 HOWTO (R_PPC_GNU_VTINHERIT, /* type */ 1766 0, /* rightshift */ 1767 0, /* size (0 = byte, 1 = short, 2 = long) */ 1768 0, /* bitsize */ 1769 FALSE, /* pc_relative */ 1770 0, /* bitpos */ 1771 complain_overflow_dont, /* complain_on_overflow */ 1772 NULL, /* special_function */ 1773 "R_PPC_GNU_VTINHERIT", /* name */ 1774 FALSE, /* partial_inplace */ 1775 0, /* src_mask */ 1776 0, /* dst_mask */ 1777 FALSE), /* pcrel_offset */ 1778 1779 /* GNU extension to record C++ vtable member usage. */ 1780 HOWTO (R_PPC_GNU_VTENTRY, /* type */ 1781 0, /* rightshift */ 1782 0, /* size (0 = byte, 1 = short, 2 = long) */ 1783 0, /* bitsize */ 1784 FALSE, /* pc_relative */ 1785 0, /* bitpos */ 1786 complain_overflow_dont, /* complain_on_overflow */ 1787 NULL, /* special_function */ 1788 "R_PPC_GNU_VTENTRY", /* name */ 1789 FALSE, /* partial_inplace */ 1790 0, /* src_mask */ 1791 0, /* dst_mask */ 1792 FALSE), /* pcrel_offset */ 1793 1794 /* Phony reloc to handle AIX style TOC entries. */ 1795 HOWTO (R_PPC_TOC16, /* type */ 1796 0, /* rightshift */ 1797 1, /* size (0 = byte, 1 = short, 2 = long) */ 1798 16, /* bitsize */ 1799 FALSE, /* pc_relative */ 1800 0, /* bitpos */ 1801 complain_overflow_signed, /* complain_on_overflow */ 1802 ppc_elf_unhandled_reloc, /* special_function */ 1803 "R_PPC_TOC16", /* name */ 1804 FALSE, /* partial_inplace */ 1805 0, /* src_mask */ 1806 0xffff, /* dst_mask */ 1807 FALSE), /* pcrel_offset */ 1808 }; 1809 1810 /* External 32-bit PPC structure for PRPSINFO. This structure is 1811 ABI-defined, thus we choose to use char arrays here in order to 1812 avoid dealing with different types in different architectures. 1813 1814 The PPC 32-bit structure uses int for `pr_uid' and `pr_gid' while 1815 most non-PPC architectures use `short int'. 1816 1817 This structure will ultimately be written in the corefile's note 1818 section, as the PRPSINFO. */ 1819 1820 struct elf_external_ppc_linux_prpsinfo32 1821 { 1822 char pr_state; /* Numeric process state. */ 1823 char pr_sname; /* Char for pr_state. */ 1824 char pr_zomb; /* Zombie. */ 1825 char pr_nice; /* Nice val. */ 1826 char pr_flag[4]; /* Flags. */ 1827 char pr_uid[4]; 1828 char pr_gid[4]; 1829 char pr_pid[4]; 1830 char pr_ppid[4]; 1831 char pr_pgrp[4]; 1832 char pr_sid[4]; 1833 char pr_fname[16]; /* Filename of executable. */ 1834 char pr_psargs[80]; /* Initial part of arg list. */ 1835 }; 1836 1837 /* Helper function to copy an elf_internal_linux_prpsinfo in host 1838 endian to an elf_external_ppc_linux_prpsinfo32 in target endian. */ 1839 1840 static inline void 1841 swap_ppc_linux_prpsinfo32_out (bfd *obfd, 1842 const struct elf_internal_linux_prpsinfo *from, 1843 struct elf_external_ppc_linux_prpsinfo32 *to) 1844 { 1845 bfd_put_8 (obfd, from->pr_state, &to->pr_state); 1846 bfd_put_8 (obfd, from->pr_sname, &to->pr_sname); 1847 bfd_put_8 (obfd, from->pr_zomb, &to->pr_zomb); 1848 bfd_put_8 (obfd, from->pr_nice, &to->pr_nice); 1849 bfd_put_32 (obfd, from->pr_flag, to->pr_flag); 1850 bfd_put_32 (obfd, from->pr_uid, to->pr_uid); 1851 bfd_put_32 (obfd, from->pr_gid, to->pr_gid); 1852 bfd_put_32 (obfd, from->pr_pid, to->pr_pid); 1853 bfd_put_32 (obfd, from->pr_ppid, to->pr_ppid); 1854 bfd_put_32 (obfd, from->pr_pgrp, to->pr_pgrp); 1855 bfd_put_32 (obfd, from->pr_sid, to->pr_sid); 1856 strncpy (to->pr_fname, from->pr_fname, sizeof (to->pr_fname)); 1857 strncpy (to->pr_psargs, from->pr_psargs, sizeof (to->pr_psargs)); 1858 } 1859 1860 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */ 1861 1862 static void 1863 ppc_elf_howto_init (void) 1864 { 1865 unsigned int i, type; 1866 1867 for (i = 0; 1868 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]); 1869 i++) 1870 { 1871 type = ppc_elf_howto_raw[i].type; 1872 if (type >= (sizeof (ppc_elf_howto_table) 1873 / sizeof (ppc_elf_howto_table[0]))) 1874 abort (); 1875 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i]; 1876 } 1877 } 1878 1879 static reloc_howto_type * 1880 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 1881 bfd_reloc_code_real_type code) 1882 { 1883 enum elf_ppc_reloc_type r; 1884 1885 /* Initialize howto table if not already done. */ 1886 if (!ppc_elf_howto_table[R_PPC_ADDR32]) 1887 ppc_elf_howto_init (); 1888 1889 switch (code) 1890 { 1891 default: 1892 return NULL; 1893 1894 case BFD_RELOC_NONE: r = R_PPC_NONE; break; 1895 case BFD_RELOC_32: r = R_PPC_ADDR32; break; 1896 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break; 1897 case BFD_RELOC_PPC64_ADDR16_DS: 1898 case BFD_RELOC_16: r = R_PPC_ADDR16; break; 1899 case BFD_RELOC_PPC64_ADDR16_LO_DS: 1900 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break; 1901 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break; 1902 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break; 1903 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break; 1904 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break; 1905 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break; 1906 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break; 1907 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break; 1908 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break; 1909 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break; 1910 case BFD_RELOC_PPC64_GOT16_DS: 1911 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break; 1912 case BFD_RELOC_PPC64_GOT16_LO_DS: 1913 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break; 1914 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break; 1915 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break; 1916 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break; 1917 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break; 1918 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break; 1919 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break; 1920 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break; 1921 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break; 1922 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break; 1923 case BFD_RELOC_PPC64_PLT16_LO_DS: 1924 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break; 1925 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break; 1926 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break; 1927 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break; 1928 case BFD_RELOC_PPC64_SECTOFF_DS: 1929 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break; 1930 case BFD_RELOC_PPC64_SECTOFF_LO_DS: 1931 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break; 1932 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break; 1933 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break; 1934 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break; 1935 case BFD_RELOC_PPC64_TOC16_DS: 1936 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break; 1937 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break; 1938 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break; 1939 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break; 1940 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break; 1941 case BFD_RELOC_PPC64_TPREL16_DS: 1942 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break; 1943 case BFD_RELOC_PPC64_TPREL16_LO_DS: 1944 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break; 1945 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break; 1946 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break; 1947 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break; 1948 case BFD_RELOC_PPC64_DTPREL16_DS: 1949 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break; 1950 case BFD_RELOC_PPC64_DTPREL16_LO_DS: 1951 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break; 1952 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break; 1953 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break; 1954 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break; 1955 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break; 1956 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break; 1957 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break; 1958 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break; 1959 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break; 1960 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break; 1961 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break; 1962 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break; 1963 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break; 1964 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break; 1965 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break; 1966 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break; 1967 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break; 1968 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break; 1969 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break; 1970 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break; 1971 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break; 1972 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break; 1973 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break; 1974 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break; 1975 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break; 1976 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break; 1977 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break; 1978 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break; 1979 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break; 1980 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break; 1981 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break; 1982 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break; 1983 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break; 1984 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break; 1985 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break; 1986 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break; 1987 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break; 1988 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break; 1989 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break; 1990 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break; 1991 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break; 1992 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break; 1993 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break; 1994 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break; 1995 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break; 1996 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break; 1997 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break; 1998 case BFD_RELOC_PPC_VLE_SDAREL_LO16A: 1999 r = R_PPC_VLE_SDAREL_LO16A; 2000 break; 2001 case BFD_RELOC_PPC_VLE_SDAREL_LO16D: 2002 r = R_PPC_VLE_SDAREL_LO16D; 2003 break; 2004 case BFD_RELOC_PPC_VLE_SDAREL_HI16A: 2005 r = R_PPC_VLE_SDAREL_HI16A; 2006 break; 2007 case BFD_RELOC_PPC_VLE_SDAREL_HI16D: 2008 r = R_PPC_VLE_SDAREL_HI16D; 2009 break; 2010 case BFD_RELOC_PPC_VLE_SDAREL_HA16A: 2011 r = R_PPC_VLE_SDAREL_HA16A; 2012 break; 2013 case BFD_RELOC_PPC_VLE_SDAREL_HA16D: 2014 r = R_PPC_VLE_SDAREL_HA16D; 2015 break; 2016 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break; 2017 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break; 2018 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break; 2019 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break; 2020 case BFD_RELOC_PPC_16DX_HA: r = R_PPC_16DX_HA; break; 2021 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC_REL16DX_HA; break; 2022 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break; 2023 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break; 2024 } 2025 2026 return ppc_elf_howto_table[r]; 2027 }; 2028 2029 static reloc_howto_type * 2030 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 2031 const char *r_name) 2032 { 2033 unsigned int i; 2034 2035 for (i = 0; 2036 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]); 2037 i++) 2038 if (ppc_elf_howto_raw[i].name != NULL 2039 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0) 2040 return &ppc_elf_howto_raw[i]; 2041 2042 return NULL; 2043 } 2044 2045 /* Set the howto pointer for a PowerPC ELF reloc. */ 2046 2047 static void 2048 ppc_elf_info_to_howto (bfd *abfd, 2049 arelent *cache_ptr, 2050 Elf_Internal_Rela *dst) 2051 { 2052 unsigned int r_type; 2053 2054 /* Initialize howto table if not already done. */ 2055 if (!ppc_elf_howto_table[R_PPC_ADDR32]) 2056 ppc_elf_howto_init (); 2057 2058 r_type = ELF32_R_TYPE (dst->r_info); 2059 if (r_type >= R_PPC_max) 2060 { 2061 /* xgettext:c-format */ 2062 _bfd_error_handler (_("%B: unrecognised PPC reloc number: %d"), 2063 abfd, r_type); 2064 bfd_set_error (bfd_error_bad_value); 2065 r_type = R_PPC_NONE; 2066 } 2067 cache_ptr->howto = ppc_elf_howto_table[r_type]; 2068 2069 /* Just because the above assert didn't trigger doesn't mean that 2070 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */ 2071 if (!cache_ptr->howto) 2072 { 2073 /* xgettext:c-format */ 2074 _bfd_error_handler (_("%B: invalid relocation type %d"), 2075 abfd, r_type); 2076 bfd_set_error (bfd_error_bad_value); 2077 2078 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE]; 2079 } 2080 } 2081 2082 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */ 2083 2084 static bfd_reloc_status_type 2085 ppc_elf_addr16_ha_reloc (bfd *abfd, 2086 arelent *reloc_entry, 2087 asymbol *symbol, 2088 void *data, 2089 asection *input_section, 2090 bfd *output_bfd, 2091 char **error_message ATTRIBUTE_UNUSED) 2092 { 2093 enum elf_ppc_reloc_type r_type; 2094 long insn; 2095 bfd_size_type octets; 2096 bfd_vma value; 2097 2098 if (output_bfd != NULL) 2099 { 2100 reloc_entry->address += input_section->output_offset; 2101 return bfd_reloc_ok; 2102 } 2103 2104 reloc_entry->addend += 0x8000; 2105 r_type = reloc_entry->howto->type; 2106 if (r_type != R_PPC_REL16DX_HA) 2107 return bfd_reloc_continue; 2108 2109 value = 0; 2110 if (!bfd_is_com_section (symbol->section)) 2111 value = symbol->value; 2112 value += (reloc_entry->addend 2113 + symbol->section->output_offset 2114 + symbol->section->output_section->vma); 2115 value -= (reloc_entry->address 2116 + input_section->output_offset 2117 + input_section->output_section->vma); 2118 value >>= 16; 2119 2120 octets = reloc_entry->address * bfd_octets_per_byte (abfd); 2121 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets); 2122 insn &= ~0x1fffc1; 2123 insn |= (value & 0xffc1) | ((value & 0x3e) << 15); 2124 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets); 2125 return bfd_reloc_ok; 2126 } 2127 2128 static bfd_reloc_status_type 2129 ppc_elf_unhandled_reloc (bfd *abfd, 2130 arelent *reloc_entry, 2131 asymbol *symbol, 2132 void *data, 2133 asection *input_section, 2134 bfd *output_bfd, 2135 char **error_message) 2136 { 2137 /* If this is a relocatable link (output_bfd test tells us), just 2138 call the generic function. Any adjustment will be done at final 2139 link time. */ 2140 if (output_bfd != NULL) 2141 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, 2142 input_section, output_bfd, error_message); 2143 2144 if (error_message != NULL) 2145 { 2146 static char buf[60]; 2147 sprintf (buf, _("generic linker can't handle %s"), 2148 reloc_entry->howto->name); 2149 *error_message = buf; 2150 } 2151 return bfd_reloc_dangerous; 2152 } 2153 2154 /* Sections created by the linker. */ 2155 2156 typedef struct elf_linker_section 2157 { 2158 /* Pointer to the bfd section. */ 2159 asection *section; 2160 /* Section name. */ 2161 const char *name; 2162 /* Associated bss section name. */ 2163 const char *bss_name; 2164 /* Associated symbol name. */ 2165 const char *sym_name; 2166 /* Associated symbol. */ 2167 struct elf_link_hash_entry *sym; 2168 } elf_linker_section_t; 2169 2170 /* Linked list of allocated pointer entries. This hangs off of the 2171 symbol lists, and provides allows us to return different pointers, 2172 based on different addend's. */ 2173 2174 typedef struct elf_linker_section_pointers 2175 { 2176 /* next allocated pointer for this symbol */ 2177 struct elf_linker_section_pointers *next; 2178 /* offset of pointer from beginning of section */ 2179 bfd_vma offset; 2180 /* addend used */ 2181 bfd_vma addend; 2182 /* which linker section this is */ 2183 elf_linker_section_t *lsect; 2184 } elf_linker_section_pointers_t; 2185 2186 struct ppc_elf_obj_tdata 2187 { 2188 struct elf_obj_tdata elf; 2189 2190 /* A mapping from local symbols to offsets into the various linker 2191 sections added. This is index by the symbol index. */ 2192 elf_linker_section_pointers_t **linker_section_pointers; 2193 2194 /* Flags used to auto-detect plt type. */ 2195 unsigned int makes_plt_call : 1; 2196 unsigned int has_rel16 : 1; 2197 }; 2198 2199 #define ppc_elf_tdata(bfd) \ 2200 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any) 2201 2202 #define elf_local_ptr_offsets(bfd) \ 2203 (ppc_elf_tdata (bfd)->linker_section_pointers) 2204 2205 #define is_ppc_elf(bfd) \ 2206 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ 2207 && elf_object_id (bfd) == PPC32_ELF_DATA) 2208 2209 /* Override the generic function because we store some extras. */ 2210 2211 static bfd_boolean 2212 ppc_elf_mkobject (bfd *abfd) 2213 { 2214 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata), 2215 PPC32_ELF_DATA); 2216 } 2217 2218 /* When defaulting arch/mach, decode apuinfo to find a better match. */ 2219 2220 bfd_boolean 2221 _bfd_elf_ppc_set_arch (bfd *abfd) 2222 { 2223 unsigned long mach = 0; 2224 asection *s; 2225 unsigned char *contents; 2226 2227 if (abfd->arch_info->bits_per_word == 32 2228 && bfd_big_endian (abfd)) 2229 { 2230 2231 for (s = abfd->sections; s != NULL; s = s->next) 2232 if ((elf_section_data (s)->this_hdr.sh_flags & SHF_PPC_VLE) != 0) 2233 break; 2234 if (s != NULL) 2235 mach = bfd_mach_ppc_vle; 2236 } 2237 2238 if (mach == 0) 2239 { 2240 s = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); 2241 if (s != NULL && bfd_malloc_and_get_section (abfd, s, &contents)) 2242 { 2243 unsigned int apuinfo_size = bfd_get_32 (abfd, contents + 4); 2244 unsigned int i; 2245 2246 for (i = 20; i < apuinfo_size + 20 && i + 4 <= s->size; i += 4) 2247 { 2248 unsigned int val = bfd_get_32 (abfd, contents + i); 2249 switch (val >> 16) 2250 { 2251 case PPC_APUINFO_PMR: 2252 case PPC_APUINFO_RFMCI: 2253 if (mach == 0) 2254 mach = bfd_mach_ppc_titan; 2255 break; 2256 2257 case PPC_APUINFO_ISEL: 2258 case PPC_APUINFO_CACHELCK: 2259 if (mach == bfd_mach_ppc_titan) 2260 mach = bfd_mach_ppc_e500mc; 2261 break; 2262 2263 case PPC_APUINFO_SPE: 2264 case PPC_APUINFO_EFS: 2265 case PPC_APUINFO_BRLOCK: 2266 if (mach != bfd_mach_ppc_vle) 2267 mach = bfd_mach_ppc_e500; 2268 break; 2269 2270 case PPC_APUINFO_VLE: 2271 mach = bfd_mach_ppc_vle; 2272 break; 2273 2274 default: 2275 mach = -1ul; 2276 } 2277 } 2278 free (contents); 2279 } 2280 } 2281 2282 if (mach != 0 && mach != -1ul) 2283 { 2284 const bfd_arch_info_type *arch; 2285 2286 for (arch = abfd->arch_info->next; arch; arch = arch->next) 2287 if (arch->mach == mach) 2288 { 2289 abfd->arch_info = arch; 2290 break; 2291 } 2292 } 2293 return TRUE; 2294 } 2295 2296 /* Fix bad default arch selected for a 32 bit input bfd when the 2297 default is 64 bit. Also select arch based on apuinfo. */ 2298 2299 static bfd_boolean 2300 ppc_elf_object_p (bfd *abfd) 2301 { 2302 if (!abfd->arch_info->the_default) 2303 return TRUE; 2304 2305 if (abfd->arch_info->bits_per_word == 64) 2306 { 2307 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd); 2308 2309 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32) 2310 { 2311 /* Relies on arch after 64 bit default being 32 bit default. */ 2312 abfd->arch_info = abfd->arch_info->next; 2313 BFD_ASSERT (abfd->arch_info->bits_per_word == 32); 2314 } 2315 } 2316 return _bfd_elf_ppc_set_arch (abfd); 2317 } 2318 2319 /* Function to set whether a module needs the -mrelocatable bit set. */ 2320 2321 static bfd_boolean 2322 ppc_elf_set_private_flags (bfd *abfd, flagword flags) 2323 { 2324 BFD_ASSERT (!elf_flags_init (abfd) 2325 || elf_elfheader (abfd)->e_flags == flags); 2326 2327 elf_elfheader (abfd)->e_flags = flags; 2328 elf_flags_init (abfd) = TRUE; 2329 return TRUE; 2330 } 2331 2332 /* Support for core dump NOTE sections. */ 2333 2334 static bfd_boolean 2335 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) 2336 { 2337 int offset; 2338 unsigned int size; 2339 2340 switch (note->descsz) 2341 { 2342 default: 2343 return FALSE; 2344 2345 case 268: /* Linux/PPC. */ 2346 /* pr_cursig */ 2347 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); 2348 2349 /* pr_pid */ 2350 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); 2351 2352 /* pr_reg */ 2353 offset = 72; 2354 size = 192; 2355 2356 break; 2357 } 2358 2359 /* Make a ".reg/999" section. */ 2360 return _bfd_elfcore_make_pseudosection (abfd, ".reg", 2361 size, note->descpos + offset); 2362 } 2363 2364 static bfd_boolean 2365 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) 2366 { 2367 switch (note->descsz) 2368 { 2369 default: 2370 return FALSE; 2371 2372 case 128: /* Linux/PPC elf_prpsinfo. */ 2373 elf_tdata (abfd)->core->pid 2374 = bfd_get_32 (abfd, note->descdata + 16); 2375 elf_tdata (abfd)->core->program 2376 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16); 2377 elf_tdata (abfd)->core->command 2378 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80); 2379 } 2380 2381 /* Note that for some reason, a spurious space is tacked 2382 onto the end of the args in some (at least one anyway) 2383 implementations, so strip it off if it exists. */ 2384 2385 { 2386 char *command = elf_tdata (abfd)->core->command; 2387 int n = strlen (command); 2388 2389 if (0 < n && command[n - 1] == ' ') 2390 command[n - 1] = '\0'; 2391 } 2392 2393 return TRUE; 2394 } 2395 2396 char * 2397 elfcore_write_ppc_linux_prpsinfo32 2398 (bfd *abfd, 2399 char *buf, 2400 int *bufsiz, 2401 const struct elf_internal_linux_prpsinfo *prpsinfo) 2402 { 2403 struct elf_external_ppc_linux_prpsinfo32 data; 2404 2405 swap_ppc_linux_prpsinfo32_out (abfd, prpsinfo, &data); 2406 return elfcore_write_note (abfd, buf, bufsiz, 2407 "CORE", NT_PRPSINFO, &data, sizeof (data)); 2408 } 2409 2410 static char * 2411 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...) 2412 { 2413 switch (note_type) 2414 { 2415 default: 2416 return NULL; 2417 2418 case NT_PRPSINFO: 2419 { 2420 char data[128]; 2421 va_list ap; 2422 2423 va_start (ap, note_type); 2424 memset (data, 0, sizeof (data)); 2425 strncpy (data + 32, va_arg (ap, const char *), 16); 2426 strncpy (data + 48, va_arg (ap, const char *), 80); 2427 va_end (ap); 2428 return elfcore_write_note (abfd, buf, bufsiz, 2429 "CORE", note_type, data, sizeof (data)); 2430 } 2431 2432 case NT_PRSTATUS: 2433 { 2434 char data[268]; 2435 va_list ap; 2436 long pid; 2437 int cursig; 2438 const void *greg; 2439 2440 va_start (ap, note_type); 2441 memset (data, 0, 72); 2442 pid = va_arg (ap, long); 2443 bfd_put_32 (abfd, pid, data + 24); 2444 cursig = va_arg (ap, int); 2445 bfd_put_16 (abfd, cursig, data + 12); 2446 greg = va_arg (ap, const void *); 2447 memcpy (data + 72, greg, 192); 2448 memset (data + 264, 0, 4); 2449 va_end (ap); 2450 return elfcore_write_note (abfd, buf, bufsiz, 2451 "CORE", note_type, data, sizeof (data)); 2452 } 2453 } 2454 } 2455 2456 static flagword 2457 ppc_elf_lookup_section_flags (char *flag_name) 2458 { 2459 2460 if (!strcmp (flag_name, "SHF_PPC_VLE")) 2461 return SHF_PPC_VLE; 2462 2463 return 0; 2464 } 2465 2466 /* Return address for Ith PLT stub in section PLT, for relocation REL 2467 or (bfd_vma) -1 if it should not be included. */ 2468 2469 static bfd_vma 2470 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED, 2471 const asection *plt ATTRIBUTE_UNUSED, 2472 const arelent *rel) 2473 { 2474 return rel->address; 2475 } 2476 2477 /* Handle a PowerPC specific section when reading an object file. This 2478 is called when bfd_section_from_shdr finds a section with an unknown 2479 type. */ 2480 2481 static bfd_boolean 2482 ppc_elf_section_from_shdr (bfd *abfd, 2483 Elf_Internal_Shdr *hdr, 2484 const char *name, 2485 int shindex) 2486 { 2487 asection *newsect; 2488 flagword flags; 2489 2490 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) 2491 return FALSE; 2492 2493 newsect = hdr->bfd_section; 2494 flags = bfd_get_section_flags (abfd, newsect); 2495 if (hdr->sh_flags & SHF_EXCLUDE) 2496 flags |= SEC_EXCLUDE; 2497 2498 if (hdr->sh_type == SHT_ORDERED) 2499 flags |= SEC_SORT_ENTRIES; 2500 2501 bfd_set_section_flags (abfd, newsect, flags); 2502 return TRUE; 2503 } 2504 2505 /* Set up any other section flags and such that may be necessary. */ 2506 2507 static bfd_boolean 2508 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, 2509 Elf_Internal_Shdr *shdr, 2510 asection *asect) 2511 { 2512 if ((asect->flags & SEC_SORT_ENTRIES) != 0) 2513 shdr->sh_type = SHT_ORDERED; 2514 2515 return TRUE; 2516 } 2517 2518 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we 2519 need to bump up the number of section headers. */ 2520 2521 static int 2522 ppc_elf_additional_program_headers (bfd *abfd, 2523 struct bfd_link_info *info ATTRIBUTE_UNUSED) 2524 { 2525 asection *s; 2526 int ret = 0; 2527 2528 s = bfd_get_section_by_name (abfd, ".sbss2"); 2529 if (s != NULL && (s->flags & SEC_ALLOC) != 0) 2530 ++ret; 2531 2532 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0"); 2533 if (s != NULL && (s->flags & SEC_ALLOC) != 0) 2534 ++ret; 2535 2536 return ret; 2537 } 2538 2539 /* Modify the segment map for VLE executables. */ 2540 2541 bfd_boolean 2542 ppc_elf_modify_segment_map (bfd *abfd, 2543 struct bfd_link_info *info ATTRIBUTE_UNUSED) 2544 { 2545 struct elf_segment_map *m; 2546 2547 /* At this point in the link, output sections have already been sorted by 2548 LMA and assigned to segments. All that is left to do is to ensure 2549 there is no mixing of VLE & non-VLE sections in a text segment. 2550 If we find that case, we split the segment. 2551 We maintain the original output section order. */ 2552 2553 for (m = elf_seg_map (abfd); m != NULL; m = m->next) 2554 { 2555 struct elf_segment_map *n; 2556 bfd_size_type amt; 2557 unsigned int j, k; 2558 unsigned int p_flags; 2559 2560 if (m->p_type != PT_LOAD || m->count == 0) 2561 continue; 2562 2563 for (p_flags = PF_R, j = 0; j != m->count; ++j) 2564 { 2565 if ((m->sections[j]->flags & SEC_READONLY) == 0) 2566 p_flags |= PF_W; 2567 if ((m->sections[j]->flags & SEC_CODE) != 0) 2568 { 2569 p_flags |= PF_X; 2570 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0) 2571 p_flags |= PF_PPC_VLE; 2572 break; 2573 } 2574 } 2575 if (j != m->count) 2576 while (++j != m->count) 2577 { 2578 unsigned int p_flags1 = PF_R; 2579 2580 if ((m->sections[j]->flags & SEC_READONLY) == 0) 2581 p_flags1 |= PF_W; 2582 if ((m->sections[j]->flags & SEC_CODE) != 0) 2583 { 2584 p_flags1 |= PF_X; 2585 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0) 2586 p_flags1 |= PF_PPC_VLE; 2587 if (((p_flags1 ^ p_flags) & PF_PPC_VLE) != 0) 2588 break; 2589 } 2590 p_flags |= p_flags1; 2591 } 2592 /* If we're splitting a segment which originally contained rw 2593 sections then those sections might now only be in one of the 2594 two parts. So always set p_flags if splitting, even if we 2595 are being called for objcopy with p_flags_valid set. */ 2596 if (j != m->count || !m->p_flags_valid) 2597 { 2598 m->p_flags_valid = 1; 2599 m->p_flags = p_flags; 2600 } 2601 if (j == m->count) 2602 continue; 2603 2604 /* Sections 0..j-1 stay in this (current) segment, 2605 the remainder are put in a new segment. 2606 The scan resumes with the new segment. */ 2607 2608 amt = sizeof (struct elf_segment_map); 2609 amt += (m->count - j - 1) * sizeof (asection *); 2610 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt); 2611 if (n == NULL) 2612 return FALSE; 2613 2614 n->p_type = PT_LOAD; 2615 n->count = m->count - j; 2616 for (k = 0; k < n->count; ++k) 2617 n->sections[k] = m->sections[j + k]; 2618 m->count = j; 2619 m->p_size_valid = 0; 2620 n->next = m->next; 2621 m->next = n; 2622 } 2623 2624 return TRUE; 2625 } 2626 2627 /* Add extra PPC sections -- Note, for now, make .sbss2 and 2628 .PPC.EMB.sbss0 a normal section, and not a bss section so 2629 that the linker doesn't crater when trying to make more than 2630 2 sections. */ 2631 2632 static const struct bfd_elf_special_section ppc_elf_special_sections[] = 2633 { 2634 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR }, 2635 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, 2636 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC }, 2637 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, 2638 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC }, 2639 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC }, 2640 { STRING_COMMA_LEN (APUINFO_SECTION_NAME), 0, SHT_NOTE, 0 }, 2641 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC }, 2642 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC }, 2643 { NULL, 0, 0, 0, 0 } 2644 }; 2645 2646 /* This is what we want for new plt/got. */ 2647 static struct bfd_elf_special_section ppc_alt_plt = 2648 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC }; 2649 2650 static const struct bfd_elf_special_section * 2651 ppc_elf_get_sec_type_attr (bfd *abfd, asection *sec) 2652 { 2653 const struct bfd_elf_special_section *ssect; 2654 2655 /* See if this is one of the special sections. */ 2656 if (sec->name == NULL) 2657 return NULL; 2658 2659 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections, 2660 sec->use_rela_p); 2661 if (ssect != NULL) 2662 { 2663 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0) 2664 ssect = &ppc_alt_plt; 2665 return ssect; 2666 } 2667 2668 return _bfd_elf_get_sec_type_attr (abfd, sec); 2669 } 2670 2671 /* Very simple linked list structure for recording apuinfo values. */ 2672 typedef struct apuinfo_list 2673 { 2674 struct apuinfo_list *next; 2675 unsigned long value; 2676 } 2677 apuinfo_list; 2678 2679 static apuinfo_list *head; 2680 static bfd_boolean apuinfo_set; 2681 2682 static void 2683 apuinfo_list_init (void) 2684 { 2685 head = NULL; 2686 apuinfo_set = FALSE; 2687 } 2688 2689 static void 2690 apuinfo_list_add (unsigned long value) 2691 { 2692 apuinfo_list *entry = head; 2693 2694 while (entry != NULL) 2695 { 2696 if (entry->value == value) 2697 return; 2698 entry = entry->next; 2699 } 2700 2701 entry = bfd_malloc (sizeof (* entry)); 2702 if (entry == NULL) 2703 return; 2704 2705 entry->value = value; 2706 entry->next = head; 2707 head = entry; 2708 } 2709 2710 static unsigned 2711 apuinfo_list_length (void) 2712 { 2713 apuinfo_list *entry; 2714 unsigned long count; 2715 2716 for (entry = head, count = 0; 2717 entry; 2718 entry = entry->next) 2719 ++ count; 2720 2721 return count; 2722 } 2723 2724 static inline unsigned long 2725 apuinfo_list_element (unsigned long number) 2726 { 2727 apuinfo_list * entry; 2728 2729 for (entry = head; 2730 entry && number --; 2731 entry = entry->next) 2732 ; 2733 2734 return entry ? entry->value : 0; 2735 } 2736 2737 static void 2738 apuinfo_list_finish (void) 2739 { 2740 apuinfo_list *entry; 2741 2742 for (entry = head; entry;) 2743 { 2744 apuinfo_list *next = entry->next; 2745 free (entry); 2746 entry = next; 2747 } 2748 2749 head = NULL; 2750 } 2751 2752 /* Scan the input BFDs and create a linked list of 2753 the APUinfo values that will need to be emitted. */ 2754 2755 static void 2756 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info) 2757 { 2758 bfd *ibfd; 2759 asection *asec; 2760 char *buffer = NULL; 2761 bfd_size_type largest_input_size = 0; 2762 unsigned i; 2763 unsigned long length; 2764 const char *error_message = NULL; 2765 2766 if (link_info == NULL) 2767 return; 2768 2769 apuinfo_list_init (); 2770 2771 /* Read in the input sections contents. */ 2772 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link.next) 2773 { 2774 unsigned long datum; 2775 2776 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME); 2777 if (asec == NULL) 2778 continue; 2779 2780 /* xgettext:c-format */ 2781 error_message = _("corrupt %s section in %B"); 2782 length = asec->size; 2783 if (length < 20) 2784 goto fail; 2785 2786 apuinfo_set = TRUE; 2787 if (largest_input_size < asec->size) 2788 { 2789 if (buffer) 2790 free (buffer); 2791 largest_input_size = asec->size; 2792 buffer = bfd_malloc (largest_input_size); 2793 if (!buffer) 2794 return; 2795 } 2796 2797 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0 2798 || (bfd_bread (buffer, length, ibfd) != length)) 2799 { 2800 /* xgettext:c-format */ 2801 error_message = _("unable to read in %s section from %B"); 2802 goto fail; 2803 } 2804 2805 /* Verify the contents of the header. Note - we have to 2806 extract the values this way in order to allow for a 2807 host whose endian-ness is different from the target. */ 2808 datum = bfd_get_32 (ibfd, buffer); 2809 if (datum != sizeof APUINFO_LABEL) 2810 goto fail; 2811 2812 datum = bfd_get_32 (ibfd, buffer + 8); 2813 if (datum != 0x2) 2814 goto fail; 2815 2816 if (strcmp (buffer + 12, APUINFO_LABEL) != 0) 2817 goto fail; 2818 2819 /* Get the number of bytes used for apuinfo entries. */ 2820 datum = bfd_get_32 (ibfd, buffer + 4); 2821 if (datum + 20 != length) 2822 goto fail; 2823 2824 /* Scan the apuinfo section, building a list of apuinfo numbers. */ 2825 for (i = 0; i < datum; i += 4) 2826 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i)); 2827 } 2828 2829 error_message = NULL; 2830 2831 if (apuinfo_set) 2832 { 2833 /* Compute the size of the output section. */ 2834 unsigned num_entries = apuinfo_list_length (); 2835 2836 /* Set the output section size, if it exists. */ 2837 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); 2838 2839 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4)) 2840 { 2841 ibfd = abfd; 2842 /* xgettext:c-format */ 2843 error_message = _("warning: unable to set size of %s section in %B"); 2844 } 2845 } 2846 2847 fail: 2848 if (buffer) 2849 free (buffer); 2850 2851 if (error_message) 2852 _bfd_error_handler (error_message, ibfd, APUINFO_SECTION_NAME); 2853 } 2854 2855 /* Prevent the output section from accumulating the input sections' 2856 contents. We have already stored this in our linked list structure. */ 2857 2858 static bfd_boolean 2859 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED, 2860 struct bfd_link_info *link_info ATTRIBUTE_UNUSED, 2861 asection *asec, 2862 bfd_byte *contents ATTRIBUTE_UNUSED) 2863 { 2864 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0; 2865 } 2866 2867 /* Finally we can generate the output section. */ 2868 2869 static void 2870 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED) 2871 { 2872 bfd_byte *buffer; 2873 asection *asec; 2874 unsigned i; 2875 unsigned num_entries; 2876 bfd_size_type length; 2877 2878 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); 2879 if (asec == NULL) 2880 return; 2881 2882 if (!apuinfo_set) 2883 return; 2884 2885 length = asec->size; 2886 if (length < 20) 2887 return; 2888 2889 buffer = bfd_malloc (length); 2890 if (buffer == NULL) 2891 { 2892 _bfd_error_handler 2893 (_("failed to allocate space for new APUinfo section.")); 2894 return; 2895 } 2896 2897 /* Create the apuinfo header. */ 2898 num_entries = apuinfo_list_length (); 2899 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer); 2900 bfd_put_32 (abfd, num_entries * 4, buffer + 4); 2901 bfd_put_32 (abfd, 0x2, buffer + 8); 2902 strcpy ((char *) buffer + 12, APUINFO_LABEL); 2903 2904 length = 20; 2905 for (i = 0; i < num_entries; i++) 2906 { 2907 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length); 2908 length += 4; 2909 } 2910 2911 if (length != asec->size) 2912 _bfd_error_handler (_("failed to compute new APUinfo section.")); 2913 2914 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length)) 2915 _bfd_error_handler (_("failed to install new APUinfo section.")); 2916 2917 free (buffer); 2918 2919 apuinfo_list_finish (); 2920 } 2921 2922 static bfd_boolean 2923 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off) 2924 { 2925 bfd_byte buf[GLINK_ENTRY_SIZE]; 2926 2927 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE)) 2928 return FALSE; 2929 2930 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11 2931 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11 2932 && bfd_get_32 (abfd, buf + 8) == MTCTR_11 2933 && bfd_get_32 (abfd, buf + 12) == BCTR); 2934 } 2935 2936 static bfd_boolean 2937 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr) 2938 { 2939 bfd_vma vma = *(bfd_vma *) ptr; 2940 return ((section->flags & SEC_ALLOC) != 0 2941 && section->vma <= vma 2942 && vma < section->vma + section->size); 2943 } 2944 2945 static long 2946 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms, 2947 long dynsymcount, asymbol **dynsyms, 2948 asymbol **ret) 2949 { 2950 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean); 2951 asection *plt, *relplt, *dynamic, *glink; 2952 bfd_vma glink_vma = 0; 2953 bfd_vma resolv_vma = 0; 2954 bfd_vma stub_vma; 2955 asymbol *s; 2956 arelent *p; 2957 long count, i; 2958 size_t size; 2959 char *names; 2960 bfd_byte buf[4]; 2961 2962 *ret = NULL; 2963 2964 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0) 2965 return 0; 2966 2967 if (dynsymcount <= 0) 2968 return 0; 2969 2970 relplt = bfd_get_section_by_name (abfd, ".rela.plt"); 2971 if (relplt == NULL) 2972 return 0; 2973 2974 plt = bfd_get_section_by_name (abfd, ".plt"); 2975 if (plt == NULL) 2976 return 0; 2977 2978 /* Call common code to handle old-style executable PLTs. */ 2979 if (elf_section_flags (plt) & SHF_EXECINSTR) 2980 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms, 2981 dynsymcount, dynsyms, ret); 2982 2983 /* If this object was prelinked, the prelinker stored the address 2984 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */ 2985 dynamic = bfd_get_section_by_name (abfd, ".dynamic"); 2986 if (dynamic != NULL) 2987 { 2988 bfd_byte *dynbuf, *extdyn, *extdynend; 2989 size_t extdynsize; 2990 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *); 2991 2992 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf)) 2993 return -1; 2994 2995 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn; 2996 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in; 2997 2998 extdyn = dynbuf; 2999 extdynend = extdyn + dynamic->size; 3000 for (; extdyn < extdynend; extdyn += extdynsize) 3001 { 3002 Elf_Internal_Dyn dyn; 3003 (*swap_dyn_in) (abfd, extdyn, &dyn); 3004 3005 if (dyn.d_tag == DT_NULL) 3006 break; 3007 3008 if (dyn.d_tag == DT_PPC_GOT) 3009 { 3010 unsigned int g_o_t = dyn.d_un.d_val; 3011 asection *got = bfd_get_section_by_name (abfd, ".got"); 3012 if (got != NULL 3013 && bfd_get_section_contents (abfd, got, buf, 3014 g_o_t - got->vma + 4, 4)) 3015 glink_vma = bfd_get_32 (abfd, buf); 3016 break; 3017 } 3018 } 3019 free (dynbuf); 3020 } 3021 3022 /* Otherwise we read the first plt entry. */ 3023 if (glink_vma == 0) 3024 { 3025 if (bfd_get_section_contents (abfd, plt, buf, 0, 4)) 3026 glink_vma = bfd_get_32 (abfd, buf); 3027 } 3028 3029 if (glink_vma == 0) 3030 return 0; 3031 3032 /* The .glink section usually does not survive the final 3033 link; search for the section (usually .text) where the 3034 glink stubs now reside. */ 3035 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma); 3036 if (glink == NULL) 3037 return 0; 3038 3039 /* Determine glink PLT resolver by reading the relative branch 3040 from the first glink stub. */ 3041 if (bfd_get_section_contents (abfd, glink, buf, 3042 glink_vma - glink->vma, 4)) 3043 { 3044 unsigned int insn = bfd_get_32 (abfd, buf); 3045 3046 /* The first glink stub may either branch to the resolver ... */ 3047 insn ^= B; 3048 if ((insn & ~0x3fffffc) == 0) 3049 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000; 3050 3051 /* ... or fall through a bunch of NOPs. */ 3052 else if ((insn ^ B ^ NOP) == 0) 3053 for (i = 4; 3054 bfd_get_section_contents (abfd, glink, buf, 3055 glink_vma - glink->vma + i, 4); 3056 i += 4) 3057 if (bfd_get_32 (abfd, buf) != NOP) 3058 { 3059 resolv_vma = glink_vma + i; 3060 break; 3061 } 3062 } 3063 3064 count = relplt->size / sizeof (Elf32_External_Rela); 3065 /* If the stubs are those for -shared/-pie then we might have 3066 multiple stubs for each plt entry. If that is the case then 3067 there is no way to associate stubs with their plt entries short 3068 of figuring out the GOT pointer value used in the stub. */ 3069 if (!is_nonpic_glink_stub (abfd, glink, 3070 glink_vma - GLINK_ENTRY_SIZE - glink->vma)) 3071 return 0; 3072 3073 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; 3074 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE)) 3075 return -1; 3076 3077 size = count * sizeof (asymbol); 3078 p = relplt->relocation; 3079 for (i = 0; i < count; i++, p++) 3080 { 3081 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt"); 3082 if (p->addend != 0) 3083 size += sizeof ("+0x") - 1 + 8; 3084 } 3085 3086 size += sizeof (asymbol) + sizeof ("__glink"); 3087 3088 if (resolv_vma) 3089 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve"); 3090 3091 s = *ret = bfd_malloc (size); 3092 if (s == NULL) 3093 return -1; 3094 3095 stub_vma = glink_vma; 3096 names = (char *) (s + count + 1 + (resolv_vma != 0)); 3097 p = relplt->relocation + count - 1; 3098 for (i = 0; i < count; i++) 3099 { 3100 size_t len; 3101 3102 *s = **p->sym_ptr_ptr; 3103 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since 3104 we are defining a symbol, ensure one of them is set. */ 3105 if ((s->flags & BSF_LOCAL) == 0) 3106 s->flags |= BSF_GLOBAL; 3107 s->flags |= BSF_SYNTHETIC; 3108 s->section = glink; 3109 stub_vma -= 16; 3110 if (strcmp ((*p->sym_ptr_ptr)->name, "__tls_get_addr_opt") == 0) 3111 stub_vma -= 32; 3112 s->value = stub_vma - glink->vma; 3113 s->name = names; 3114 s->udata.p = NULL; 3115 len = strlen ((*p->sym_ptr_ptr)->name); 3116 memcpy (names, (*p->sym_ptr_ptr)->name, len); 3117 names += len; 3118 if (p->addend != 0) 3119 { 3120 memcpy (names, "+0x", sizeof ("+0x") - 1); 3121 names += sizeof ("+0x") - 1; 3122 bfd_sprintf_vma (abfd, names, p->addend); 3123 names += strlen (names); 3124 } 3125 memcpy (names, "@plt", sizeof ("@plt")); 3126 names += sizeof ("@plt"); 3127 ++s; 3128 --p; 3129 } 3130 3131 /* Add a symbol at the start of the glink branch table. */ 3132 memset (s, 0, sizeof *s); 3133 s->the_bfd = abfd; 3134 s->flags = BSF_GLOBAL | BSF_SYNTHETIC; 3135 s->section = glink; 3136 s->value = glink_vma - glink->vma; 3137 s->name = names; 3138 memcpy (names, "__glink", sizeof ("__glink")); 3139 names += sizeof ("__glink"); 3140 s++; 3141 count++; 3142 3143 if (resolv_vma) 3144 { 3145 /* Add a symbol for the glink PLT resolver. */ 3146 memset (s, 0, sizeof *s); 3147 s->the_bfd = abfd; 3148 s->flags = BSF_GLOBAL | BSF_SYNTHETIC; 3149 s->section = glink; 3150 s->value = resolv_vma - glink->vma; 3151 s->name = names; 3152 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve")); 3153 names += sizeof ("__glink_PLTresolve"); 3154 s++; 3155 count++; 3156 } 3157 3158 return count; 3159 } 3160 3161 /* The following functions are specific to the ELF linker, while 3162 functions above are used generally. They appear in this file more 3163 or less in the order in which they are called. eg. 3164 ppc_elf_check_relocs is called early in the link process, 3165 ppc_elf_finish_dynamic_sections is one of the last functions 3166 called. */ 3167 3168 /* Track PLT entries needed for a given symbol. We might need more 3169 than one glink entry per symbol when generating a pic binary. */ 3170 struct plt_entry 3171 { 3172 struct plt_entry *next; 3173 3174 /* -fPIC uses multiple GOT sections, one per file, called ".got2". 3175 This field stores the offset into .got2 used to initialise the 3176 GOT pointer reg. It will always be at least 32768. (Current 3177 gcc always uses an offset of 32768, but ld -r will pack .got2 3178 sections together resulting in larger offsets). */ 3179 bfd_vma addend; 3180 3181 /* The .got2 section. */ 3182 asection *sec; 3183 3184 /* PLT refcount or offset. */ 3185 union 3186 { 3187 bfd_signed_vma refcount; 3188 bfd_vma offset; 3189 } plt; 3190 3191 /* .glink stub offset. */ 3192 bfd_vma glink_offset; 3193 }; 3194 3195 /* Of those relocs that might be copied as dynamic relocs, this function 3196 selects those that must be copied when linking a shared library, 3197 even when the symbol is local. */ 3198 3199 static int 3200 must_be_dyn_reloc (struct bfd_link_info *info, 3201 enum elf_ppc_reloc_type r_type) 3202 { 3203 switch (r_type) 3204 { 3205 default: 3206 return 1; 3207 3208 case R_PPC_REL24: 3209 case R_PPC_REL14: 3210 case R_PPC_REL14_BRTAKEN: 3211 case R_PPC_REL14_BRNTAKEN: 3212 case R_PPC_REL32: 3213 return 0; 3214 3215 case R_PPC_TPREL32: 3216 case R_PPC_TPREL16: 3217 case R_PPC_TPREL16_LO: 3218 case R_PPC_TPREL16_HI: 3219 case R_PPC_TPREL16_HA: 3220 return !bfd_link_executable (info); 3221 } 3222 } 3223 3224 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid 3225 copying dynamic variables from a shared lib into an app's dynbss 3226 section, and instead use a dynamic relocation to point into the 3227 shared lib. */ 3228 #define ELIMINATE_COPY_RELOCS 1 3229 3230 /* Used to track dynamic relocations for local symbols. */ 3231 struct ppc_dyn_relocs 3232 { 3233 struct ppc_dyn_relocs *next; 3234 3235 /* The input section of the reloc. */ 3236 asection *sec; 3237 3238 /* Total number of relocs copied for the input section. */ 3239 unsigned int count : 31; 3240 3241 /* Whether this entry is for STT_GNU_IFUNC symbols. */ 3242 unsigned int ifunc : 1; 3243 }; 3244 3245 /* PPC ELF linker hash entry. */ 3246 3247 struct ppc_elf_link_hash_entry 3248 { 3249 struct elf_link_hash_entry elf; 3250 3251 /* If this symbol is used in the linker created sections, the processor 3252 specific backend uses this field to map the field into the offset 3253 from the beginning of the section. */ 3254 elf_linker_section_pointers_t *linker_section_pointer; 3255 3256 /* Track dynamic relocs copied for this symbol. */ 3257 struct elf_dyn_relocs *dyn_relocs; 3258 3259 /* Contexts in which symbol is used in the GOT (or TOC). 3260 TLS_GD .. TLS_TLS bits are or'd into the mask as the 3261 corresponding relocs are encountered during check_relocs. 3262 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to 3263 indicate the corresponding GOT entry type is not needed. */ 3264 #define TLS_GD 1 /* GD reloc. */ 3265 #define TLS_LD 2 /* LD reloc. */ 3266 #define TLS_TPREL 4 /* TPREL reloc, => IE. */ 3267 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */ 3268 #define TLS_TLS 16 /* Any TLS reloc. */ 3269 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */ 3270 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */ 3271 char tls_mask; 3272 3273 /* Nonzero if we have seen a small data relocation referring to this 3274 symbol. */ 3275 unsigned char has_sda_refs : 1; 3276 3277 /* Flag use of given relocations. */ 3278 unsigned char has_addr16_ha : 1; 3279 unsigned char has_addr16_lo : 1; 3280 }; 3281 3282 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent)) 3283 3284 /* PPC ELF linker hash table. */ 3285 3286 struct ppc_elf_link_hash_table 3287 { 3288 struct elf_link_hash_table elf; 3289 3290 /* Various options passed from the linker. */ 3291 struct ppc_elf_params *params; 3292 3293 /* Short-cuts to get to dynamic linker sections. */ 3294 asection *glink; 3295 asection *dynsbss; 3296 asection *relsbss; 3297 elf_linker_section_t sdata[2]; 3298 asection *sbss; 3299 asection *glink_eh_frame; 3300 3301 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */ 3302 asection *srelplt2; 3303 3304 /* Shortcut to __tls_get_addr. */ 3305 struct elf_link_hash_entry *tls_get_addr; 3306 3307 /* The bfd that forced an old-style PLT. */ 3308 bfd *old_bfd; 3309 3310 /* TLS local dynamic got entry handling. */ 3311 union { 3312 bfd_signed_vma refcount; 3313 bfd_vma offset; 3314 } tlsld_got; 3315 3316 /* Offset of branch table to PltResolve function in glink. */ 3317 bfd_vma glink_pltresolve; 3318 3319 /* Size of reserved GOT entries. */ 3320 unsigned int got_header_size; 3321 /* Non-zero if allocating the header left a gap. */ 3322 unsigned int got_gap; 3323 3324 /* The type of PLT we have chosen to use. */ 3325 enum ppc_elf_plt_type plt_type; 3326 3327 /* True if the target system is VxWorks. */ 3328 unsigned int is_vxworks:1; 3329 3330 /* Whether there exist local gnu indirect function resolvers, 3331 referenced by dynamic relocations. */ 3332 unsigned int local_ifunc_resolver:1; 3333 unsigned int maybe_local_ifunc_resolver:1; 3334 3335 /* The size of PLT entries. */ 3336 int plt_entry_size; 3337 /* The distance between adjacent PLT slots. */ 3338 int plt_slot_size; 3339 /* The size of the first PLT entry. */ 3340 int plt_initial_entry_size; 3341 3342 /* Small local sym cache. */ 3343 struct sym_cache sym_cache; 3344 }; 3345 3346 /* Rename some of the generic section flags to better document how they 3347 are used for ppc32. The flags are only valid for ppc32 elf objects. */ 3348 3349 /* Nonzero if this section has TLS related relocations. */ 3350 #define has_tls_reloc sec_flg0 3351 3352 /* Nonzero if this section has a call to __tls_get_addr. */ 3353 #define has_tls_get_addr_call sec_flg1 3354 3355 /* Get the PPC ELF linker hash table from a link_info structure. */ 3356 3357 #define ppc_elf_hash_table(p) \ 3358 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ 3359 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL) 3360 3361 /* Create an entry in a PPC ELF linker hash table. */ 3362 3363 static struct bfd_hash_entry * 3364 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry, 3365 struct bfd_hash_table *table, 3366 const char *string) 3367 { 3368 /* Allocate the structure if it has not already been allocated by a 3369 subclass. */ 3370 if (entry == NULL) 3371 { 3372 entry = bfd_hash_allocate (table, 3373 sizeof (struct ppc_elf_link_hash_entry)); 3374 if (entry == NULL) 3375 return entry; 3376 } 3377 3378 /* Call the allocation method of the superclass. */ 3379 entry = _bfd_elf_link_hash_newfunc (entry, table, string); 3380 if (entry != NULL) 3381 { 3382 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL; 3383 ppc_elf_hash_entry (entry)->dyn_relocs = NULL; 3384 ppc_elf_hash_entry (entry)->tls_mask = 0; 3385 ppc_elf_hash_entry (entry)->has_sda_refs = 0; 3386 } 3387 3388 return entry; 3389 } 3390 3391 /* Create a PPC ELF linker hash table. */ 3392 3393 static struct bfd_link_hash_table * 3394 ppc_elf_link_hash_table_create (bfd *abfd) 3395 { 3396 struct ppc_elf_link_hash_table *ret; 3397 static struct ppc_elf_params default_params 3398 = { PLT_OLD, 0, 1, 0, 0, 12, 0, 0, 0 }; 3399 3400 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table)); 3401 if (ret == NULL) 3402 return NULL; 3403 3404 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, 3405 ppc_elf_link_hash_newfunc, 3406 sizeof (struct ppc_elf_link_hash_entry), 3407 PPC32_ELF_DATA)) 3408 { 3409 free (ret); 3410 return NULL; 3411 } 3412 3413 ret->elf.init_plt_refcount.refcount = 0; 3414 ret->elf.init_plt_refcount.glist = NULL; 3415 ret->elf.init_plt_offset.offset = 0; 3416 ret->elf.init_plt_offset.glist = NULL; 3417 3418 ret->params = &default_params; 3419 3420 ret->sdata[0].name = ".sdata"; 3421 ret->sdata[0].sym_name = "_SDA_BASE_"; 3422 ret->sdata[0].bss_name = ".sbss"; 3423 3424 ret->sdata[1].name = ".sdata2"; 3425 ret->sdata[1].sym_name = "_SDA2_BASE_"; 3426 ret->sdata[1].bss_name = ".sbss2"; 3427 3428 ret->plt_entry_size = 12; 3429 ret->plt_slot_size = 8; 3430 ret->plt_initial_entry_size = 72; 3431 3432 return &ret->elf.root; 3433 } 3434 3435 /* Hook linker params into hash table. */ 3436 3437 void 3438 ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params) 3439 { 3440 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 3441 3442 if (htab) 3443 htab->params = params; 3444 params->pagesize_p2 = bfd_log2 (params->pagesize); 3445 } 3446 3447 /* Create .got and the related sections. */ 3448 3449 static bfd_boolean 3450 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info) 3451 { 3452 struct ppc_elf_link_hash_table *htab; 3453 3454 if (!_bfd_elf_create_got_section (abfd, info)) 3455 return FALSE; 3456 3457 htab = ppc_elf_hash_table (info); 3458 if (!htab->is_vxworks) 3459 { 3460 /* The powerpc .got has a blrl instruction in it. Mark it 3461 executable. */ 3462 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS 3463 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 3464 if (!bfd_set_section_flags (abfd, htab->elf.sgot, flags)) 3465 return FALSE; 3466 } 3467 3468 return TRUE; 3469 } 3470 3471 /* Create a special linker section, used for R_PPC_EMB_SDAI16 and 3472 R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata 3473 and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */ 3474 3475 static bfd_boolean 3476 ppc_elf_create_linker_section (bfd *abfd, 3477 struct bfd_link_info *info, 3478 flagword flags, 3479 elf_linker_section_t *lsect) 3480 { 3481 asection *s; 3482 3483 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY 3484 | SEC_LINKER_CREATED); 3485 3486 s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags); 3487 if (s == NULL) 3488 return FALSE; 3489 lsect->section = s; 3490 3491 /* Define the sym on the first section of this name. */ 3492 s = bfd_get_section_by_name (abfd, lsect->name); 3493 3494 lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name); 3495 if (lsect->sym == NULL) 3496 return FALSE; 3497 lsect->sym->root.u.def.value = 0x8000; 3498 return TRUE; 3499 } 3500 3501 static bfd_boolean 3502 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info) 3503 { 3504 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 3505 asection *s; 3506 flagword flags; 3507 3508 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS 3509 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 3510 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags); 3511 htab->glink = s; 3512 if (s == NULL 3513 || !bfd_set_section_alignment (abfd, s, 3514 htab->params->ppc476_workaround ? 6 : 4)) 3515 return FALSE; 3516 3517 if (!info->no_ld_generated_unwind_info) 3518 { 3519 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS 3520 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 3521 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags); 3522 htab->glink_eh_frame = s; 3523 if (s == NULL 3524 || !bfd_set_section_alignment (abfd, s, 2)) 3525 return FALSE; 3526 } 3527 3528 flags = SEC_ALLOC | SEC_LINKER_CREATED; 3529 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags); 3530 htab->elf.iplt = s; 3531 if (s == NULL 3532 || !bfd_set_section_alignment (abfd, s, 4)) 3533 return FALSE; 3534 3535 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS 3536 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 3537 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags); 3538 htab->elf.irelplt = s; 3539 if (s == NULL 3540 || ! bfd_set_section_alignment (abfd, s, 2)) 3541 return FALSE; 3542 3543 if (!ppc_elf_create_linker_section (abfd, info, 0, 3544 &htab->sdata[0])) 3545 return FALSE; 3546 3547 if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY, 3548 &htab->sdata[1])) 3549 return FALSE; 3550 3551 return TRUE; 3552 } 3553 3554 /* We have to create .dynsbss and .rela.sbss here so that they get mapped 3555 to output sections (just like _bfd_elf_create_dynamic_sections has 3556 to create .dynbss and .rela.bss). */ 3557 3558 static bfd_boolean 3559 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) 3560 { 3561 struct ppc_elf_link_hash_table *htab; 3562 asection *s; 3563 flagword flags; 3564 3565 htab = ppc_elf_hash_table (info); 3566 3567 if (htab->elf.sgot == NULL 3568 && !ppc_elf_create_got (abfd, info)) 3569 return FALSE; 3570 3571 if (!_bfd_elf_create_dynamic_sections (abfd, info)) 3572 return FALSE; 3573 3574 if (htab->glink == NULL 3575 && !ppc_elf_create_glink (abfd, info)) 3576 return FALSE; 3577 3578 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss", 3579 SEC_ALLOC | SEC_LINKER_CREATED); 3580 htab->dynsbss = s; 3581 if (s == NULL) 3582 return FALSE; 3583 3584 if (! bfd_link_pic (info)) 3585 { 3586 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS 3587 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 3588 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags); 3589 htab->relsbss = s; 3590 if (s == NULL 3591 || ! bfd_set_section_alignment (abfd, s, 2)) 3592 return FALSE; 3593 } 3594 3595 if (htab->is_vxworks 3596 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2)) 3597 return FALSE; 3598 3599 s = htab->elf.splt; 3600 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED; 3601 if (htab->plt_type == PLT_VXWORKS) 3602 /* The VxWorks PLT is a loaded section with contents. */ 3603 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY; 3604 return bfd_set_section_flags (abfd, s, flags); 3605 } 3606 3607 /* Copy the extra info we tack onto an elf_link_hash_entry. */ 3608 3609 static void 3610 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info, 3611 struct elf_link_hash_entry *dir, 3612 struct elf_link_hash_entry *ind) 3613 { 3614 struct ppc_elf_link_hash_entry *edir, *eind; 3615 3616 edir = (struct ppc_elf_link_hash_entry *) dir; 3617 eind = (struct ppc_elf_link_hash_entry *) ind; 3618 3619 edir->tls_mask |= eind->tls_mask; 3620 edir->has_sda_refs |= eind->has_sda_refs; 3621 3622 /* If called to transfer flags for a weakdef during processing 3623 of elf_adjust_dynamic_symbol, don't copy non_got_ref. 3624 We clear it ourselves for ELIMINATE_COPY_RELOCS. */ 3625 if (!(ELIMINATE_COPY_RELOCS 3626 && eind->elf.root.type != bfd_link_hash_indirect 3627 && edir->elf.dynamic_adjusted)) 3628 edir->elf.non_got_ref |= eind->elf.non_got_ref; 3629 3630 if (edir->elf.versioned != versioned_hidden) 3631 edir->elf.ref_dynamic |= eind->elf.ref_dynamic; 3632 edir->elf.ref_regular |= eind->elf.ref_regular; 3633 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak; 3634 edir->elf.needs_plt |= eind->elf.needs_plt; 3635 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed; 3636 3637 if (eind->dyn_relocs != NULL) 3638 { 3639 if (edir->dyn_relocs != NULL) 3640 { 3641 struct elf_dyn_relocs **pp; 3642 struct elf_dyn_relocs *p; 3643 3644 /* Add reloc counts against the indirect sym to the direct sym 3645 list. Merge any entries against the same section. */ 3646 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) 3647 { 3648 struct elf_dyn_relocs *q; 3649 3650 for (q = edir->dyn_relocs; q != NULL; q = q->next) 3651 if (q->sec == p->sec) 3652 { 3653 q->pc_count += p->pc_count; 3654 q->count += p->count; 3655 *pp = p->next; 3656 break; 3657 } 3658 if (q == NULL) 3659 pp = &p->next; 3660 } 3661 *pp = edir->dyn_relocs; 3662 } 3663 3664 edir->dyn_relocs = eind->dyn_relocs; 3665 eind->dyn_relocs = NULL; 3666 } 3667 3668 /* If we were called to copy over info for a weak sym, that's all. 3669 You might think dyn_relocs need not be copied over; After all, 3670 both syms will be dynamic or both non-dynamic so we're just 3671 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS 3672 code in ppc_elf_adjust_dynamic_symbol needs to check for 3673 dyn_relocs in read-only sections, and it does so on what is the 3674 DIR sym here. */ 3675 if (eind->elf.root.type != bfd_link_hash_indirect) 3676 return; 3677 3678 /* Copy over the GOT refcount entries that we may have already seen to 3679 the symbol which just became indirect. */ 3680 edir->elf.got.refcount += eind->elf.got.refcount; 3681 eind->elf.got.refcount = 0; 3682 3683 /* And plt entries. */ 3684 if (eind->elf.plt.plist != NULL) 3685 { 3686 if (edir->elf.plt.plist != NULL) 3687 { 3688 struct plt_entry **entp; 3689 struct plt_entry *ent; 3690 3691 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; ) 3692 { 3693 struct plt_entry *dent; 3694 3695 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next) 3696 if (dent->sec == ent->sec && dent->addend == ent->addend) 3697 { 3698 dent->plt.refcount += ent->plt.refcount; 3699 *entp = ent->next; 3700 break; 3701 } 3702 if (dent == NULL) 3703 entp = &ent->next; 3704 } 3705 *entp = edir->elf.plt.plist; 3706 } 3707 3708 edir->elf.plt.plist = eind->elf.plt.plist; 3709 eind->elf.plt.plist = NULL; 3710 } 3711 3712 if (eind->elf.dynindx != -1) 3713 { 3714 if (edir->elf.dynindx != -1) 3715 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, 3716 edir->elf.dynstr_index); 3717 edir->elf.dynindx = eind->elf.dynindx; 3718 edir->elf.dynstr_index = eind->elf.dynstr_index; 3719 eind->elf.dynindx = -1; 3720 eind->elf.dynstr_index = 0; 3721 } 3722 } 3723 3724 /* Hook called by the linker routine which adds symbols from an object 3725 file. We use it to put .comm items in .sbss, and not .bss. */ 3726 3727 static bfd_boolean 3728 ppc_elf_add_symbol_hook (bfd *abfd, 3729 struct bfd_link_info *info, 3730 Elf_Internal_Sym *sym, 3731 const char **namep ATTRIBUTE_UNUSED, 3732 flagword *flagsp ATTRIBUTE_UNUSED, 3733 asection **secp, 3734 bfd_vma *valp) 3735 { 3736 if (sym->st_shndx == SHN_COMMON 3737 && !bfd_link_relocatable (info) 3738 && is_ppc_elf (info->output_bfd) 3739 && sym->st_size <= elf_gp_size (abfd)) 3740 { 3741 /* Common symbols less than or equal to -G nn bytes are automatically 3742 put into .sbss. */ 3743 struct ppc_elf_link_hash_table *htab; 3744 3745 htab = ppc_elf_hash_table (info); 3746 if (htab->sbss == NULL) 3747 { 3748 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED; 3749 3750 if (!htab->elf.dynobj) 3751 htab->elf.dynobj = abfd; 3752 3753 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj, 3754 ".sbss", 3755 flags); 3756 if (htab->sbss == NULL) 3757 return FALSE; 3758 } 3759 3760 *secp = htab->sbss; 3761 *valp = sym->st_size; 3762 } 3763 3764 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC 3765 && (abfd->flags & DYNAMIC) == 0 3766 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour) 3767 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc; 3768 3769 return TRUE; 3770 } 3771 3772 /* Find a linker generated pointer with a given addend and type. */ 3773 3774 static elf_linker_section_pointers_t * 3775 elf_find_pointer_linker_section 3776 (elf_linker_section_pointers_t *linker_pointers, 3777 bfd_vma addend, 3778 elf_linker_section_t *lsect) 3779 { 3780 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next) 3781 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend) 3782 return linker_pointers; 3783 3784 return NULL; 3785 } 3786 3787 /* Allocate a pointer to live in a linker created section. */ 3788 3789 static bfd_boolean 3790 elf_allocate_pointer_linker_section (bfd *abfd, 3791 elf_linker_section_t *lsect, 3792 struct elf_link_hash_entry *h, 3793 const Elf_Internal_Rela *rel) 3794 { 3795 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL; 3796 elf_linker_section_pointers_t *linker_section_ptr; 3797 unsigned long r_symndx = ELF32_R_SYM (rel->r_info); 3798 bfd_size_type amt; 3799 3800 BFD_ASSERT (lsect != NULL); 3801 3802 /* Is this a global symbol? */ 3803 if (h != NULL) 3804 { 3805 struct ppc_elf_link_hash_entry *eh; 3806 3807 /* Has this symbol already been allocated? If so, our work is done. */ 3808 eh = (struct ppc_elf_link_hash_entry *) h; 3809 if (elf_find_pointer_linker_section (eh->linker_section_pointer, 3810 rel->r_addend, 3811 lsect)) 3812 return TRUE; 3813 3814 ptr_linker_section_ptr = &eh->linker_section_pointer; 3815 } 3816 else 3817 { 3818 BFD_ASSERT (is_ppc_elf (abfd)); 3819 3820 /* Allocation of a pointer to a local symbol. */ 3821 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd); 3822 3823 /* Allocate a table to hold the local symbols if first time. */ 3824 if (!ptr) 3825 { 3826 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info; 3827 3828 amt = num_symbols; 3829 amt *= sizeof (elf_linker_section_pointers_t *); 3830 ptr = bfd_zalloc (abfd, amt); 3831 3832 if (!ptr) 3833 return FALSE; 3834 3835 elf_local_ptr_offsets (abfd) = ptr; 3836 } 3837 3838 /* Has this symbol already been allocated? If so, our work is done. */ 3839 if (elf_find_pointer_linker_section (ptr[r_symndx], 3840 rel->r_addend, 3841 lsect)) 3842 return TRUE; 3843 3844 ptr_linker_section_ptr = &ptr[r_symndx]; 3845 } 3846 3847 /* Allocate space for a pointer in the linker section, and allocate 3848 a new pointer record from internal memory. */ 3849 BFD_ASSERT (ptr_linker_section_ptr != NULL); 3850 amt = sizeof (elf_linker_section_pointers_t); 3851 linker_section_ptr = bfd_alloc (abfd, amt); 3852 3853 if (!linker_section_ptr) 3854 return FALSE; 3855 3856 linker_section_ptr->next = *ptr_linker_section_ptr; 3857 linker_section_ptr->addend = rel->r_addend; 3858 linker_section_ptr->lsect = lsect; 3859 *ptr_linker_section_ptr = linker_section_ptr; 3860 3861 if (!bfd_set_section_alignment (lsect->section->owner, lsect->section, 2)) 3862 return FALSE; 3863 linker_section_ptr->offset = lsect->section->size; 3864 lsect->section->size += 4; 3865 3866 #ifdef DEBUG 3867 fprintf (stderr, 3868 "Create pointer in linker section %s, offset = %ld, section size = %ld\n", 3869 lsect->name, (long) linker_section_ptr->offset, 3870 (long) lsect->section->size); 3871 #endif 3872 3873 return TRUE; 3874 } 3875 3876 static struct plt_entry ** 3877 update_local_sym_info (bfd *abfd, 3878 Elf_Internal_Shdr *symtab_hdr, 3879 unsigned long r_symndx, 3880 int tls_type) 3881 { 3882 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd); 3883 struct plt_entry **local_plt; 3884 char *local_got_tls_masks; 3885 3886 if (local_got_refcounts == NULL) 3887 { 3888 bfd_size_type size = symtab_hdr->sh_info; 3889 3890 size *= (sizeof (*local_got_refcounts) 3891 + sizeof (*local_plt) 3892 + sizeof (*local_got_tls_masks)); 3893 local_got_refcounts = bfd_zalloc (abfd, size); 3894 if (local_got_refcounts == NULL) 3895 return NULL; 3896 elf_local_got_refcounts (abfd) = local_got_refcounts; 3897 } 3898 3899 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info); 3900 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info); 3901 local_got_tls_masks[r_symndx] |= tls_type; 3902 if (tls_type != PLT_IFUNC) 3903 local_got_refcounts[r_symndx] += 1; 3904 return local_plt + r_symndx; 3905 } 3906 3907 static bfd_boolean 3908 update_plt_info (bfd *abfd, struct plt_entry **plist, 3909 asection *sec, bfd_vma addend) 3910 { 3911 struct plt_entry *ent; 3912 3913 if (addend < 32768) 3914 sec = NULL; 3915 for (ent = *plist; ent != NULL; ent = ent->next) 3916 if (ent->sec == sec && ent->addend == addend) 3917 break; 3918 if (ent == NULL) 3919 { 3920 bfd_size_type amt = sizeof (*ent); 3921 ent = bfd_alloc (abfd, amt); 3922 if (ent == NULL) 3923 return FALSE; 3924 ent->next = *plist; 3925 ent->sec = sec; 3926 ent->addend = addend; 3927 ent->plt.refcount = 0; 3928 *plist = ent; 3929 } 3930 ent->plt.refcount += 1; 3931 return TRUE; 3932 } 3933 3934 static struct plt_entry * 3935 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend) 3936 { 3937 struct plt_entry *ent; 3938 3939 if (addend < 32768) 3940 sec = NULL; 3941 for (ent = *plist; ent != NULL; ent = ent->next) 3942 if (ent->sec == sec && ent->addend == addend) 3943 break; 3944 return ent; 3945 } 3946 3947 static bfd_boolean 3948 is_branch_reloc (enum elf_ppc_reloc_type r_type) 3949 { 3950 return (r_type == R_PPC_PLTREL24 3951 || r_type == R_PPC_LOCAL24PC 3952 || r_type == R_PPC_REL24 3953 || r_type == R_PPC_REL14 3954 || r_type == R_PPC_REL14_BRTAKEN 3955 || r_type == R_PPC_REL14_BRNTAKEN 3956 || r_type == R_PPC_ADDR24 3957 || r_type == R_PPC_ADDR14 3958 || r_type == R_PPC_ADDR14_BRTAKEN 3959 || r_type == R_PPC_ADDR14_BRNTAKEN 3960 || r_type == R_PPC_VLE_REL24); 3961 } 3962 3963 static void 3964 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type) 3965 { 3966 _bfd_error_handler 3967 /* xgettext:c-format */ 3968 (_("%B: relocation %s cannot be used when making a shared object"), 3969 abfd, 3970 ppc_elf_howto_table[r_type]->name); 3971 bfd_set_error (bfd_error_bad_value); 3972 } 3973 3974 /* Look through the relocs for a section during the first phase, and 3975 allocate space in the global offset table or procedure linkage 3976 table. */ 3977 3978 static bfd_boolean 3979 ppc_elf_check_relocs (bfd *abfd, 3980 struct bfd_link_info *info, 3981 asection *sec, 3982 const Elf_Internal_Rela *relocs) 3983 { 3984 struct ppc_elf_link_hash_table *htab; 3985 Elf_Internal_Shdr *symtab_hdr; 3986 struct elf_link_hash_entry **sym_hashes; 3987 const Elf_Internal_Rela *rel; 3988 const Elf_Internal_Rela *rel_end; 3989 asection *got2, *sreloc; 3990 struct elf_link_hash_entry *tga; 3991 3992 if (bfd_link_relocatable (info)) 3993 return TRUE; 3994 3995 /* Don't do anything special with non-loaded, non-alloced sections. 3996 In particular, any relocs in such sections should not affect GOT 3997 and PLT reference counting (ie. we don't allow them to create GOT 3998 or PLT entries), there's no possibility or desire to optimize TLS 3999 relocs, and there's not much point in propagating relocs to shared 4000 libs that the dynamic linker won't relocate. */ 4001 if ((sec->flags & SEC_ALLOC) == 0) 4002 return TRUE; 4003 4004 #ifdef DEBUG 4005 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B", 4006 sec, abfd); 4007 #endif 4008 4009 BFD_ASSERT (is_ppc_elf (abfd)); 4010 4011 /* Initialize howto table if not already done. */ 4012 if (!ppc_elf_howto_table[R_PPC_ADDR32]) 4013 ppc_elf_howto_init (); 4014 4015 htab = ppc_elf_hash_table (info); 4016 if (htab->glink == NULL) 4017 { 4018 if (htab->elf.dynobj == NULL) 4019 htab->elf.dynobj = abfd; 4020 if (!ppc_elf_create_glink (htab->elf.dynobj, info)) 4021 return FALSE; 4022 } 4023 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr", 4024 FALSE, FALSE, TRUE); 4025 symtab_hdr = &elf_symtab_hdr (abfd); 4026 sym_hashes = elf_sym_hashes (abfd); 4027 got2 = bfd_get_section_by_name (abfd, ".got2"); 4028 sreloc = NULL; 4029 4030 rel_end = relocs + sec->reloc_count; 4031 for (rel = relocs; rel < rel_end; rel++) 4032 { 4033 unsigned long r_symndx; 4034 enum elf_ppc_reloc_type r_type; 4035 struct elf_link_hash_entry *h; 4036 int tls_type; 4037 struct plt_entry **ifunc; 4038 4039 r_symndx = ELF32_R_SYM (rel->r_info); 4040 if (r_symndx < symtab_hdr->sh_info) 4041 h = NULL; 4042 else 4043 { 4044 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 4045 while (h->root.type == bfd_link_hash_indirect 4046 || h->root.type == bfd_link_hash_warning) 4047 h = (struct elf_link_hash_entry *) h->root.u.i.link; 4048 4049 /* PR15323, ref flags aren't set for references in the same 4050 object. */ 4051 h->root.non_ir_ref = 1; 4052 } 4053 4054 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got. 4055 This shows up in particular in an R_PPC_ADDR32 in the eabi 4056 startup code. */ 4057 if (h != NULL 4058 && htab->elf.sgot == NULL 4059 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) 4060 { 4061 if (htab->elf.dynobj == NULL) 4062 htab->elf.dynobj = abfd; 4063 if (!ppc_elf_create_got (htab->elf.dynobj, info)) 4064 return FALSE; 4065 BFD_ASSERT (h == htab->elf.hgot); 4066 } 4067 4068 tls_type = 0; 4069 r_type = ELF32_R_TYPE (rel->r_info); 4070 ifunc = NULL; 4071 if (h == NULL && !htab->is_vxworks) 4072 { 4073 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache, 4074 abfd, r_symndx); 4075 if (isym == NULL) 4076 return FALSE; 4077 4078 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) 4079 { 4080 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */ 4081 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx, 4082 PLT_IFUNC); 4083 if (ifunc == NULL) 4084 return FALSE; 4085 4086 /* STT_GNU_IFUNC symbols must have a PLT entry; 4087 In a non-pie executable even when there are 4088 no plt calls. */ 4089 if (!bfd_link_pic (info) 4090 || is_branch_reloc (r_type)) 4091 { 4092 bfd_vma addend = 0; 4093 if (r_type == R_PPC_PLTREL24) 4094 { 4095 ppc_elf_tdata (abfd)->makes_plt_call = 1; 4096 if (bfd_link_pic (info)) 4097 addend = rel->r_addend; 4098 } 4099 if (!update_plt_info (abfd, ifunc, got2, addend)) 4100 return FALSE; 4101 } 4102 } 4103 } 4104 4105 if (!htab->is_vxworks 4106 && is_branch_reloc (r_type) 4107 && h != NULL 4108 && h == tga) 4109 { 4110 if (rel != relocs 4111 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD 4112 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD)) 4113 /* We have a new-style __tls_get_addr call with a marker 4114 reloc. */ 4115 ; 4116 else 4117 /* Mark this section as having an old-style call. */ 4118 sec->has_tls_get_addr_call = 1; 4119 } 4120 4121 switch (r_type) 4122 { 4123 case R_PPC_TLSGD: 4124 case R_PPC_TLSLD: 4125 /* These special tls relocs tie a call to __tls_get_addr with 4126 its parameter symbol. */ 4127 break; 4128 4129 case R_PPC_GOT_TLSLD16: 4130 case R_PPC_GOT_TLSLD16_LO: 4131 case R_PPC_GOT_TLSLD16_HI: 4132 case R_PPC_GOT_TLSLD16_HA: 4133 tls_type = TLS_TLS | TLS_LD; 4134 goto dogottls; 4135 4136 case R_PPC_GOT_TLSGD16: 4137 case R_PPC_GOT_TLSGD16_LO: 4138 case R_PPC_GOT_TLSGD16_HI: 4139 case R_PPC_GOT_TLSGD16_HA: 4140 tls_type = TLS_TLS | TLS_GD; 4141 goto dogottls; 4142 4143 case R_PPC_GOT_TPREL16: 4144 case R_PPC_GOT_TPREL16_LO: 4145 case R_PPC_GOT_TPREL16_HI: 4146 case R_PPC_GOT_TPREL16_HA: 4147 if (bfd_link_pic (info)) 4148 info->flags |= DF_STATIC_TLS; 4149 tls_type = TLS_TLS | TLS_TPREL; 4150 goto dogottls; 4151 4152 case R_PPC_GOT_DTPREL16: 4153 case R_PPC_GOT_DTPREL16_LO: 4154 case R_PPC_GOT_DTPREL16_HI: 4155 case R_PPC_GOT_DTPREL16_HA: 4156 tls_type = TLS_TLS | TLS_DTPREL; 4157 dogottls: 4158 sec->has_tls_reloc = 1; 4159 /* Fall through. */ 4160 4161 /* GOT16 relocations */ 4162 case R_PPC_GOT16: 4163 case R_PPC_GOT16_LO: 4164 case R_PPC_GOT16_HI: 4165 case R_PPC_GOT16_HA: 4166 /* This symbol requires a global offset table entry. */ 4167 if (htab->elf.sgot == NULL) 4168 { 4169 if (htab->elf.dynobj == NULL) 4170 htab->elf.dynobj = abfd; 4171 if (!ppc_elf_create_got (htab->elf.dynobj, info)) 4172 return FALSE; 4173 } 4174 if (h != NULL) 4175 { 4176 h->got.refcount += 1; 4177 ppc_elf_hash_entry (h)->tls_mask |= tls_type; 4178 } 4179 else 4180 /* This is a global offset table entry for a local symbol. */ 4181 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type)) 4182 return FALSE; 4183 4184 /* We may also need a plt entry if the symbol turns out to be 4185 an ifunc. */ 4186 if (h != NULL && !bfd_link_pic (info)) 4187 { 4188 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0)) 4189 return FALSE; 4190 } 4191 break; 4192 4193 /* Indirect .sdata relocation. */ 4194 case R_PPC_EMB_SDAI16: 4195 if (bfd_link_pic (info)) 4196 { 4197 bad_shared_reloc (abfd, r_type); 4198 return FALSE; 4199 } 4200 htab->sdata[0].sym->ref_regular = 1; 4201 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0], 4202 h, rel)) 4203 return FALSE; 4204 if (h != NULL) 4205 { 4206 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 4207 h->non_got_ref = TRUE; 4208 } 4209 break; 4210 4211 /* Indirect .sdata2 relocation. */ 4212 case R_PPC_EMB_SDA2I16: 4213 if (bfd_link_pic (info)) 4214 { 4215 bad_shared_reloc (abfd, r_type); 4216 return FALSE; 4217 } 4218 htab->sdata[1].sym->ref_regular = 1; 4219 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1], 4220 h, rel)) 4221 return FALSE; 4222 if (h != NULL) 4223 { 4224 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 4225 h->non_got_ref = TRUE; 4226 } 4227 break; 4228 4229 case R_PPC_SDAREL16: 4230 htab->sdata[0].sym->ref_regular = 1; 4231 /* Fall through. */ 4232 4233 case R_PPC_VLE_SDAREL_LO16A: 4234 case R_PPC_VLE_SDAREL_LO16D: 4235 case R_PPC_VLE_SDAREL_HI16A: 4236 case R_PPC_VLE_SDAREL_HI16D: 4237 case R_PPC_VLE_SDAREL_HA16A: 4238 case R_PPC_VLE_SDAREL_HA16D: 4239 if (h != NULL) 4240 { 4241 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 4242 h->non_got_ref = TRUE; 4243 } 4244 break; 4245 4246 case R_PPC_VLE_REL8: 4247 case R_PPC_VLE_REL15: 4248 case R_PPC_VLE_REL24: 4249 case R_PPC_VLE_LO16A: 4250 case R_PPC_VLE_LO16D: 4251 case R_PPC_VLE_HI16A: 4252 case R_PPC_VLE_HI16D: 4253 case R_PPC_VLE_HA16A: 4254 case R_PPC_VLE_HA16D: 4255 break; 4256 4257 case R_PPC_EMB_SDA2REL: 4258 if (bfd_link_pic (info)) 4259 { 4260 bad_shared_reloc (abfd, r_type); 4261 return FALSE; 4262 } 4263 htab->sdata[1].sym->ref_regular = 1; 4264 if (h != NULL) 4265 { 4266 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 4267 h->non_got_ref = TRUE; 4268 } 4269 break; 4270 4271 case R_PPC_VLE_SDA21_LO: 4272 case R_PPC_VLE_SDA21: 4273 case R_PPC_EMB_SDA21: 4274 case R_PPC_EMB_RELSDA: 4275 if (bfd_link_pic (info)) 4276 { 4277 bad_shared_reloc (abfd, r_type); 4278 return FALSE; 4279 } 4280 if (h != NULL) 4281 { 4282 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 4283 h->non_got_ref = TRUE; 4284 } 4285 break; 4286 4287 case R_PPC_EMB_NADDR32: 4288 case R_PPC_EMB_NADDR16: 4289 case R_PPC_EMB_NADDR16_LO: 4290 case R_PPC_EMB_NADDR16_HI: 4291 case R_PPC_EMB_NADDR16_HA: 4292 if (bfd_link_pic (info)) 4293 { 4294 bad_shared_reloc (abfd, r_type); 4295 return FALSE; 4296 } 4297 if (h != NULL) 4298 h->non_got_ref = TRUE; 4299 break; 4300 4301 case R_PPC_PLTREL24: 4302 if (h == NULL) 4303 break; 4304 /* Fall through */ 4305 case R_PPC_PLT32: 4306 case R_PPC_PLTREL32: 4307 case R_PPC_PLT16_LO: 4308 case R_PPC_PLT16_HI: 4309 case R_PPC_PLT16_HA: 4310 #ifdef DEBUG 4311 fprintf (stderr, "Reloc requires a PLT entry\n"); 4312 #endif 4313 /* This symbol requires a procedure linkage table entry. */ 4314 if (h == NULL) 4315 { 4316 if (ifunc == NULL) 4317 { 4318 /* It does not make sense to have a procedure linkage 4319 table entry for a non-ifunc local symbol. */ 4320 info->callbacks->einfo 4321 /* xgettext:c-format */ 4322 (_("%H: %s reloc against local symbol\n"), 4323 abfd, sec, rel->r_offset, 4324 ppc_elf_howto_table[r_type]->name); 4325 bfd_set_error (bfd_error_bad_value); 4326 return FALSE; 4327 } 4328 } 4329 else 4330 { 4331 bfd_vma addend = 0; 4332 4333 if (r_type == R_PPC_PLTREL24) 4334 { 4335 ppc_elf_tdata (abfd)->makes_plt_call = 1; 4336 if (bfd_link_pic (info)) 4337 addend = rel->r_addend; 4338 } 4339 h->needs_plt = 1; 4340 if (!update_plt_info (abfd, &h->plt.plist, got2, addend)) 4341 return FALSE; 4342 } 4343 break; 4344 4345 /* The following relocations don't need to propagate the 4346 relocation if linking a shared object since they are 4347 section relative. */ 4348 case R_PPC_SECTOFF: 4349 case R_PPC_SECTOFF_LO: 4350 case R_PPC_SECTOFF_HI: 4351 case R_PPC_SECTOFF_HA: 4352 case R_PPC_DTPREL16: 4353 case R_PPC_DTPREL16_LO: 4354 case R_PPC_DTPREL16_HI: 4355 case R_PPC_DTPREL16_HA: 4356 case R_PPC_TOC16: 4357 break; 4358 4359 case R_PPC_REL16: 4360 case R_PPC_REL16_LO: 4361 case R_PPC_REL16_HI: 4362 case R_PPC_REL16_HA: 4363 case R_PPC_REL16DX_HA: 4364 ppc_elf_tdata (abfd)->has_rel16 = 1; 4365 break; 4366 4367 /* These are just markers. */ 4368 case R_PPC_TLS: 4369 case R_PPC_EMB_MRKREF: 4370 case R_PPC_NONE: 4371 case R_PPC_max: 4372 case R_PPC_RELAX: 4373 case R_PPC_RELAX_PLT: 4374 case R_PPC_RELAX_PLTREL24: 4375 case R_PPC_16DX_HA: 4376 break; 4377 4378 /* These should only appear in dynamic objects. */ 4379 case R_PPC_COPY: 4380 case R_PPC_GLOB_DAT: 4381 case R_PPC_JMP_SLOT: 4382 case R_PPC_RELATIVE: 4383 case R_PPC_IRELATIVE: 4384 break; 4385 4386 /* These aren't handled yet. We'll report an error later. */ 4387 case R_PPC_ADDR30: 4388 case R_PPC_EMB_RELSEC16: 4389 case R_PPC_EMB_RELST_LO: 4390 case R_PPC_EMB_RELST_HI: 4391 case R_PPC_EMB_RELST_HA: 4392 case R_PPC_EMB_BIT_FLD: 4393 break; 4394 4395 /* This refers only to functions defined in the shared library. */ 4396 case R_PPC_LOCAL24PC: 4397 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET) 4398 { 4399 htab->plt_type = PLT_OLD; 4400 htab->old_bfd = abfd; 4401 } 4402 if (h != NULL && h->type == STT_GNU_IFUNC) 4403 { 4404 h->needs_plt = 1; 4405 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0)) 4406 return FALSE; 4407 } 4408 break; 4409 4410 /* This relocation describes the C++ object vtable hierarchy. 4411 Reconstruct it for later use during GC. */ 4412 case R_PPC_GNU_VTINHERIT: 4413 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 4414 return FALSE; 4415 break; 4416 4417 /* This relocation describes which C++ vtable entries are actually 4418 used. Record for later use during GC. */ 4419 case R_PPC_GNU_VTENTRY: 4420 BFD_ASSERT (h != NULL); 4421 if (h != NULL 4422 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 4423 return FALSE; 4424 break; 4425 4426 /* We shouldn't really be seeing these. */ 4427 case R_PPC_TPREL32: 4428 case R_PPC_TPREL16: 4429 case R_PPC_TPREL16_LO: 4430 case R_PPC_TPREL16_HI: 4431 case R_PPC_TPREL16_HA: 4432 if (bfd_link_pic (info)) 4433 info->flags |= DF_STATIC_TLS; 4434 goto dodyn; 4435 4436 /* Nor these. */ 4437 case R_PPC_DTPMOD32: 4438 case R_PPC_DTPREL32: 4439 goto dodyn; 4440 4441 case R_PPC_REL32: 4442 if (h == NULL 4443 && got2 != NULL 4444 && (sec->flags & SEC_CODE) != 0 4445 && bfd_link_pic (info) 4446 && htab->plt_type == PLT_UNSET) 4447 { 4448 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before 4449 the start of a function, which assembles to a REL32 4450 reference to .got2. If we detect one of these, then 4451 force the old PLT layout because the linker cannot 4452 reliably deduce the GOT pointer value needed for 4453 PLT call stubs. */ 4454 asection *s; 4455 Elf_Internal_Sym *isym; 4456 4457 isym = bfd_sym_from_r_symndx (&htab->sym_cache, 4458 abfd, r_symndx); 4459 if (isym == NULL) 4460 return FALSE; 4461 4462 s = bfd_section_from_elf_index (abfd, isym->st_shndx); 4463 if (s == got2) 4464 { 4465 htab->plt_type = PLT_OLD; 4466 htab->old_bfd = abfd; 4467 } 4468 } 4469 if (h == NULL || h == htab->elf.hgot) 4470 break; 4471 /* fall through */ 4472 4473 case R_PPC_ADDR32: 4474 case R_PPC_ADDR16: 4475 case R_PPC_ADDR16_LO: 4476 case R_PPC_ADDR16_HI: 4477 case R_PPC_ADDR16_HA: 4478 case R_PPC_UADDR32: 4479 case R_PPC_UADDR16: 4480 if (h != NULL && !bfd_link_pic (info)) 4481 { 4482 /* We may need a plt entry if the symbol turns out to be 4483 a function defined in a dynamic object. */ 4484 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0)) 4485 return FALSE; 4486 4487 /* We may need a copy reloc too. */ 4488 h->non_got_ref = 1; 4489 h->pointer_equality_needed = 1; 4490 if (r_type == R_PPC_ADDR16_HA) 4491 ppc_elf_hash_entry (h)->has_addr16_ha = 1; 4492 if (r_type == R_PPC_ADDR16_LO) 4493 ppc_elf_hash_entry (h)->has_addr16_lo = 1; 4494 } 4495 goto dodyn; 4496 4497 case R_PPC_REL24: 4498 case R_PPC_REL14: 4499 case R_PPC_REL14_BRTAKEN: 4500 case R_PPC_REL14_BRNTAKEN: 4501 if (h == NULL) 4502 break; 4503 if (h == htab->elf.hgot) 4504 { 4505 if (htab->plt_type == PLT_UNSET) 4506 { 4507 htab->plt_type = PLT_OLD; 4508 htab->old_bfd = abfd; 4509 } 4510 break; 4511 } 4512 /* fall through */ 4513 4514 case R_PPC_ADDR24: 4515 case R_PPC_ADDR14: 4516 case R_PPC_ADDR14_BRTAKEN: 4517 case R_PPC_ADDR14_BRNTAKEN: 4518 if (h != NULL && !bfd_link_pic (info)) 4519 { 4520 /* We may need a plt entry if the symbol turns out to be 4521 a function defined in a dynamic object. */ 4522 h->needs_plt = 1; 4523 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0)) 4524 return FALSE; 4525 break; 4526 } 4527 4528 dodyn: 4529 /* If we are creating a shared library, and this is a reloc 4530 against a global symbol, or a non PC relative reloc 4531 against a local symbol, then we need to copy the reloc 4532 into the shared library. However, if we are linking with 4533 -Bsymbolic, we do not need to copy a reloc against a 4534 global symbol which is defined in an object we are 4535 including in the link (i.e., DEF_REGULAR is set). At 4536 this point we have not seen all the input files, so it is 4537 possible that DEF_REGULAR is not set now but will be set 4538 later (it is never cleared). In case of a weak definition, 4539 DEF_REGULAR may be cleared later by a strong definition in 4540 a shared library. We account for that possibility below by 4541 storing information in the dyn_relocs field of the hash 4542 table entry. A similar situation occurs when creating 4543 shared libraries and symbol visibility changes render the 4544 symbol local. 4545 4546 If on the other hand, we are creating an executable, we 4547 may need to keep relocations for symbols satisfied by a 4548 dynamic library if we manage to avoid copy relocs for the 4549 symbol. */ 4550 if ((bfd_link_pic (info) 4551 && (must_be_dyn_reloc (info, r_type) 4552 || (h != NULL 4553 && (!SYMBOLIC_BIND (info, h) 4554 || h->root.type == bfd_link_hash_defweak 4555 || !h->def_regular)))) 4556 || (ELIMINATE_COPY_RELOCS 4557 && !bfd_link_pic (info) 4558 && h != NULL 4559 && (h->root.type == bfd_link_hash_defweak 4560 || !h->def_regular))) 4561 { 4562 #ifdef DEBUG 4563 fprintf (stderr, 4564 "ppc_elf_check_relocs needs to " 4565 "create relocation for %s\n", 4566 (h && h->root.root.string 4567 ? h->root.root.string : "<unknown>")); 4568 #endif 4569 if (sreloc == NULL) 4570 { 4571 if (htab->elf.dynobj == NULL) 4572 htab->elf.dynobj = abfd; 4573 4574 sreloc = _bfd_elf_make_dynamic_reloc_section 4575 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE); 4576 4577 if (sreloc == NULL) 4578 return FALSE; 4579 } 4580 4581 /* If this is a global symbol, we count the number of 4582 relocations we need for this symbol. */ 4583 if (h != NULL) 4584 { 4585 struct elf_dyn_relocs *p; 4586 struct elf_dyn_relocs **rel_head; 4587 4588 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs; 4589 p = *rel_head; 4590 if (p == NULL || p->sec != sec) 4591 { 4592 p = bfd_alloc (htab->elf.dynobj, sizeof *p); 4593 if (p == NULL) 4594 return FALSE; 4595 p->next = *rel_head; 4596 *rel_head = p; 4597 p->sec = sec; 4598 p->count = 0; 4599 p->pc_count = 0; 4600 } 4601 p->count += 1; 4602 if (!must_be_dyn_reloc (info, r_type)) 4603 p->pc_count += 1; 4604 } 4605 else 4606 { 4607 /* Track dynamic relocs needed for local syms too. 4608 We really need local syms available to do this 4609 easily. Oh well. */ 4610 struct ppc_dyn_relocs *p; 4611 struct ppc_dyn_relocs **rel_head; 4612 bfd_boolean is_ifunc; 4613 asection *s; 4614 void *vpp; 4615 Elf_Internal_Sym *isym; 4616 4617 isym = bfd_sym_from_r_symndx (&htab->sym_cache, 4618 abfd, r_symndx); 4619 if (isym == NULL) 4620 return FALSE; 4621 4622 s = bfd_section_from_elf_index (abfd, isym->st_shndx); 4623 if (s == NULL) 4624 s = sec; 4625 4626 vpp = &elf_section_data (s)->local_dynrel; 4627 rel_head = (struct ppc_dyn_relocs **) vpp; 4628 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC; 4629 p = *rel_head; 4630 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc) 4631 p = p->next; 4632 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc) 4633 { 4634 p = bfd_alloc (htab->elf.dynobj, sizeof *p); 4635 if (p == NULL) 4636 return FALSE; 4637 p->next = *rel_head; 4638 *rel_head = p; 4639 p->sec = sec; 4640 p->ifunc = is_ifunc; 4641 p->count = 0; 4642 } 4643 p->count += 1; 4644 } 4645 } 4646 4647 break; 4648 } 4649 } 4650 4651 return TRUE; 4652 } 4653 4654 /* Warn for conflicting Tag_GNU_Power_ABI_FP attributes between IBFD 4655 and OBFD, and merge non-conflicting ones. */ 4656 void 4657 _bfd_elf_ppc_merge_fp_attributes (bfd *ibfd, struct bfd_link_info *info) 4658 { 4659 bfd *obfd = info->output_bfd; 4660 obj_attribute *in_attr, *in_attrs; 4661 obj_attribute *out_attr, *out_attrs; 4662 4663 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU]; 4664 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU]; 4665 4666 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP]; 4667 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP]; 4668 4669 if (in_attr->i != out_attr->i) 4670 { 4671 int in_fp = in_attr->i & 3; 4672 int out_fp = out_attr->i & 3; 4673 4674 if (in_fp == 0) 4675 ; 4676 else if (out_fp == 0) 4677 { 4678 out_attr->type = 1; 4679 out_attr->i ^= in_fp; 4680 } 4681 else if (out_fp != 2 && in_fp == 2) 4682 _bfd_error_handler 4683 /* xgettext:c-format */ 4684 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd); 4685 else if (out_fp == 2 && in_fp != 2) 4686 _bfd_error_handler 4687 /* xgettext:c-format */ 4688 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd); 4689 else if (out_fp == 1 && in_fp == 3) 4690 _bfd_error_handler 4691 /* xgettext:c-format */ 4692 (_("Warning: %B uses double-precision hard float, " 4693 "%B uses single-precision hard float"), obfd, ibfd); 4694 else if (out_fp == 3 && in_fp == 1) 4695 _bfd_error_handler 4696 /* xgettext:c-format */ 4697 (_("Warning: %B uses double-precision hard float, " 4698 "%B uses single-precision hard float"), ibfd, obfd); 4699 4700 in_fp = in_attr->i & 0xc; 4701 out_fp = out_attr->i & 0xc; 4702 if (in_fp == 0) 4703 ; 4704 else if (out_fp == 0) 4705 { 4706 out_attr->type = 1; 4707 out_attr->i ^= in_fp; 4708 } 4709 else if (out_fp != 2 * 4 && in_fp == 2 * 4) 4710 _bfd_error_handler 4711 /* xgettext:c-format */ 4712 (_("Warning: %B uses 64-bit long double, " 4713 "%B uses 128-bit long double"), ibfd, obfd); 4714 else if (in_fp != 2 * 4 && out_fp == 2 * 4) 4715 _bfd_error_handler 4716 /* xgettext:c-format */ 4717 (_("Warning: %B uses 64-bit long double, " 4718 "%B uses 128-bit long double"), obfd, ibfd); 4719 else if (out_fp == 1 * 4 && in_fp == 3 * 4) 4720 _bfd_error_handler 4721 /* xgettext:c-format */ 4722 (_("Warning: %B uses IBM long double, " 4723 "%B uses IEEE long double"), ibfd, obfd); 4724 else if (out_fp == 3 * 4 && in_fp == 1 * 4) 4725 _bfd_error_handler 4726 /* xgettext:c-format */ 4727 (_("Warning: %B uses IBM long double, " 4728 "%B uses IEEE long double"), obfd, ibfd); 4729 } 4730 } 4731 4732 /* Merge object attributes from IBFD into OBFD. Warn if 4733 there are conflicting attributes. */ 4734 static bfd_boolean 4735 ppc_elf_merge_obj_attributes (bfd *ibfd, struct bfd_link_info *info) 4736 { 4737 bfd *obfd; 4738 obj_attribute *in_attr, *in_attrs; 4739 obj_attribute *out_attr, *out_attrs; 4740 4741 _bfd_elf_ppc_merge_fp_attributes (ibfd, info); 4742 4743 obfd = info->output_bfd; 4744 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU]; 4745 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU]; 4746 4747 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and 4748 merge non-conflicting ones. */ 4749 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector]; 4750 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector]; 4751 if (in_attr->i != out_attr->i) 4752 { 4753 int in_vec = in_attr->i & 3; 4754 int out_vec = out_attr->i & 3; 4755 4756 if (in_vec == 0) 4757 ; 4758 else if (out_vec == 0) 4759 { 4760 out_attr->type = 1; 4761 out_attr->i = in_vec; 4762 } 4763 /* For now, allow generic to transition to AltiVec or SPE 4764 without a warning. If GCC marked files with their stack 4765 alignment and used don't-care markings for files which are 4766 not affected by the vector ABI, we could warn about this 4767 case too. */ 4768 else if (in_vec == 1) 4769 ; 4770 else if (out_vec == 1) 4771 { 4772 out_attr->type = 1; 4773 out_attr->i = in_vec; 4774 } 4775 else if (out_vec < in_vec) 4776 _bfd_error_handler 4777 /* xgettext:c-format */ 4778 (_("Warning: %B uses AltiVec vector ABI, %B uses SPE vector ABI"), 4779 obfd, ibfd); 4780 else if (out_vec > in_vec) 4781 _bfd_error_handler 4782 /* xgettext:c-format */ 4783 (_("Warning: %B uses AltiVec vector ABI, %B uses SPE vector ABI"), 4784 ibfd, obfd); 4785 } 4786 4787 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes 4788 and merge non-conflicting ones. */ 4789 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return]; 4790 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return]; 4791 if (in_attr->i != out_attr->i) 4792 { 4793 int in_struct = in_attr->i & 3; 4794 int out_struct = out_attr->i & 3; 4795 4796 if (in_struct == 0 || in_struct == 3) 4797 ; 4798 else if (out_struct == 0) 4799 { 4800 out_attr->type = 1; 4801 out_attr->i = in_struct; 4802 } 4803 else if (out_struct < in_struct) 4804 _bfd_error_handler 4805 /* xgettext:c-format */ 4806 (_("Warning: %B uses r3/r4 for small structure returns, " 4807 "%B uses memory"), obfd, ibfd); 4808 else if (out_struct > in_struct) 4809 _bfd_error_handler 4810 /* xgettext:c-format */ 4811 (_("Warning: %B uses r3/r4 for small structure returns, " 4812 "%B uses memory"), ibfd, obfd); 4813 } 4814 4815 /* Merge Tag_compatibility attributes and any common GNU ones. */ 4816 _bfd_elf_merge_object_attributes (ibfd, info); 4817 4818 return TRUE; 4819 } 4820 4821 /* Merge backend specific data from an object file to the output 4822 object file when linking. */ 4823 4824 static bfd_boolean 4825 ppc_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) 4826 { 4827 bfd *obfd = info->output_bfd; 4828 flagword old_flags; 4829 flagword new_flags; 4830 bfd_boolean error; 4831 4832 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd)) 4833 return TRUE; 4834 4835 /* Check if we have the same endianness. */ 4836 if (! _bfd_generic_verify_endian_match (ibfd, info)) 4837 return FALSE; 4838 4839 if (!ppc_elf_merge_obj_attributes (ibfd, info)) 4840 return FALSE; 4841 4842 new_flags = elf_elfheader (ibfd)->e_flags; 4843 old_flags = elf_elfheader (obfd)->e_flags; 4844 if (!elf_flags_init (obfd)) 4845 { 4846 /* First call, no flags set. */ 4847 elf_flags_init (obfd) = TRUE; 4848 elf_elfheader (obfd)->e_flags = new_flags; 4849 } 4850 4851 /* Compatible flags are ok. */ 4852 else if (new_flags == old_flags) 4853 ; 4854 4855 /* Incompatible flags. */ 4856 else 4857 { 4858 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib 4859 to be linked with either. */ 4860 error = FALSE; 4861 if ((new_flags & EF_PPC_RELOCATABLE) != 0 4862 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0) 4863 { 4864 error = TRUE; 4865 _bfd_error_handler 4866 (_("%B: compiled with -mrelocatable and linked with " 4867 "modules compiled normally"), ibfd); 4868 } 4869 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0 4870 && (old_flags & EF_PPC_RELOCATABLE) != 0) 4871 { 4872 error = TRUE; 4873 _bfd_error_handler 4874 (_("%B: compiled normally and linked with " 4875 "modules compiled with -mrelocatable"), ibfd); 4876 } 4877 4878 /* The output is -mrelocatable-lib iff both the input files are. */ 4879 if (! (new_flags & EF_PPC_RELOCATABLE_LIB)) 4880 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB; 4881 4882 /* The output is -mrelocatable iff it can't be -mrelocatable-lib, 4883 but each input file is either -mrelocatable or -mrelocatable-lib. */ 4884 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB) 4885 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)) 4886 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))) 4887 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE; 4888 4889 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if 4890 any module uses it. */ 4891 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB); 4892 4893 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); 4894 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); 4895 4896 /* Warn about any other mismatches. */ 4897 if (new_flags != old_flags) 4898 { 4899 error = TRUE; 4900 _bfd_error_handler 4901 /* xgettext:c-format */ 4902 (_("%B: uses different e_flags (0x%lx) fields " 4903 "than previous modules (0x%lx)"), 4904 ibfd, (long) new_flags, (long) old_flags); 4905 } 4906 4907 if (error) 4908 { 4909 bfd_set_error (bfd_error_bad_value); 4910 return FALSE; 4911 } 4912 } 4913 4914 return TRUE; 4915 } 4916 4917 static void 4918 ppc_elf_vle_split16 (bfd *input_bfd, 4919 asection *input_section, 4920 unsigned long offset, 4921 bfd_byte *loc, 4922 bfd_vma value, 4923 split16_format_type split16_format, 4924 bfd_boolean fixup) 4925 { 4926 unsigned int insn, opcode, top5; 4927 4928 insn = bfd_get_32 (input_bfd, loc); 4929 opcode = insn & 0xfc00f800; 4930 if (opcode == E_OR2I_INSN 4931 || opcode == E_AND2I_DOT_INSN 4932 || opcode == E_OR2IS_INSN 4933 || opcode == E_LIS_INSN 4934 || opcode == E_AND2IS_DOT_INSN) 4935 { 4936 if (split16_format != split16a_type) 4937 { 4938 if (fixup) 4939 split16_format = split16a_type; 4940 else 4941 _bfd_error_handler 4942 /* xgettext:c-format */ 4943 (_("%B(%A+0x%lx): expected 16A style relocation on 0x%08x insn"), 4944 input_bfd, input_section, offset, opcode); 4945 } 4946 } 4947 else if (opcode == E_ADD2I_DOT_INSN 4948 || opcode == E_ADD2IS_INSN 4949 || opcode == E_CMP16I_INSN 4950 || opcode == E_MULL2I_INSN 4951 || opcode == E_CMPL16I_INSN 4952 || opcode == E_CMPH16I_INSN 4953 || opcode == E_CMPHL16I_INSN) 4954 { 4955 if (split16_format != split16d_type) 4956 { 4957 if (fixup) 4958 split16_format = split16d_type; 4959 else 4960 _bfd_error_handler 4961 /* xgettext:c-format */ 4962 (_("%B(%A+0x%lx): expected 16D style relocation on 0x%08x insn"), 4963 input_bfd, input_section, offset, opcode); 4964 } 4965 } 4966 top5 = value & 0xf800; 4967 top5 = top5 << (split16_format == split16a_type ? 5 : 10); 4968 insn &= (split16_format == split16a_type ? ~0x1f07ff : ~0x3e007ff); 4969 insn |= top5; 4970 insn |= value & 0x7ff; 4971 bfd_put_32 (input_bfd, insn, loc); 4972 } 4973 4974 /* Choose which PLT scheme to use, and set .plt flags appropriately. 4975 Returns -1 on error, 0 for old PLT, 1 for new PLT. */ 4976 int 4977 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED, 4978 struct bfd_link_info *info) 4979 { 4980 struct ppc_elf_link_hash_table *htab; 4981 flagword flags; 4982 4983 htab = ppc_elf_hash_table (info); 4984 4985 if (htab->plt_type == PLT_UNSET) 4986 { 4987 struct elf_link_hash_entry *h; 4988 4989 if (htab->params->plt_style == PLT_OLD) 4990 htab->plt_type = PLT_OLD; 4991 else if (bfd_link_pic (info) 4992 && htab->elf.dynamic_sections_created 4993 && (h = elf_link_hash_lookup (&htab->elf, "_mcount", 4994 FALSE, FALSE, TRUE)) != NULL 4995 && (h->type == STT_FUNC 4996 || h->needs_plt) 4997 && h->ref_regular 4998 && !(SYMBOL_CALLS_LOCAL (info, h) 4999 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 5000 && h->root.type == bfd_link_hash_undefweak))) 5001 { 5002 /* Profiling of shared libs (and pies) is not supported with 5003 secure plt, because ppc32 does profiling before a 5004 function prologue and a secure plt pic call stubs needs 5005 r30 to be set up. */ 5006 htab->plt_type = PLT_OLD; 5007 } 5008 else 5009 { 5010 bfd *ibfd; 5011 enum ppc_elf_plt_type plt_type = htab->params->plt_style; 5012 5013 /* Look through the reloc flags left by ppc_elf_check_relocs. 5014 Use the old style bss plt if a file makes plt calls 5015 without using the new relocs, and if ld isn't given 5016 --secure-plt and we never see REL16 relocs. */ 5017 if (plt_type == PLT_UNSET) 5018 plt_type = PLT_OLD; 5019 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next) 5020 if (is_ppc_elf (ibfd)) 5021 { 5022 if (ppc_elf_tdata (ibfd)->has_rel16) 5023 plt_type = PLT_NEW; 5024 else if (ppc_elf_tdata (ibfd)->makes_plt_call) 5025 { 5026 plt_type = PLT_OLD; 5027 htab->old_bfd = ibfd; 5028 break; 5029 } 5030 } 5031 htab->plt_type = plt_type; 5032 } 5033 } 5034 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW) 5035 { 5036 if (htab->old_bfd != NULL) 5037 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"), 5038 htab->old_bfd); 5039 else 5040 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n")); 5041 } 5042 5043 BFD_ASSERT (htab->plt_type != PLT_VXWORKS); 5044 5045 if (htab->plt_type == PLT_NEW) 5046 { 5047 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS 5048 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 5049 5050 /* The new PLT is a loaded section. */ 5051 if (htab->elf.splt != NULL 5052 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.splt, flags)) 5053 return -1; 5054 5055 /* The new GOT is not executable. */ 5056 if (htab->elf.sgot != NULL 5057 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.sgot, flags)) 5058 return -1; 5059 } 5060 else 5061 { 5062 /* Stop an unused .glink section from affecting .text alignment. */ 5063 if (htab->glink != NULL 5064 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0)) 5065 return -1; 5066 } 5067 return htab->plt_type == PLT_NEW; 5068 } 5069 5070 /* Return the section that should be marked against GC for a given 5071 relocation. */ 5072 5073 static asection * 5074 ppc_elf_gc_mark_hook (asection *sec, 5075 struct bfd_link_info *info, 5076 Elf_Internal_Rela *rel, 5077 struct elf_link_hash_entry *h, 5078 Elf_Internal_Sym *sym) 5079 { 5080 if (h != NULL) 5081 switch (ELF32_R_TYPE (rel->r_info)) 5082 { 5083 case R_PPC_GNU_VTINHERIT: 5084 case R_PPC_GNU_VTENTRY: 5085 return NULL; 5086 } 5087 5088 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 5089 } 5090 5091 /* Update the got, plt and dynamic reloc reference counts for the 5092 section being removed. */ 5093 5094 static bfd_boolean 5095 ppc_elf_gc_sweep_hook (bfd *abfd, 5096 struct bfd_link_info *info, 5097 asection *sec, 5098 const Elf_Internal_Rela *relocs) 5099 { 5100 struct ppc_elf_link_hash_table *htab; 5101 Elf_Internal_Shdr *symtab_hdr; 5102 struct elf_link_hash_entry **sym_hashes; 5103 bfd_signed_vma *local_got_refcounts; 5104 const Elf_Internal_Rela *rel, *relend; 5105 asection *got2; 5106 5107 if (bfd_link_relocatable (info)) 5108 return TRUE; 5109 5110 if ((sec->flags & SEC_ALLOC) == 0) 5111 return TRUE; 5112 5113 elf_section_data (sec)->local_dynrel = NULL; 5114 5115 htab = ppc_elf_hash_table (info); 5116 symtab_hdr = &elf_symtab_hdr (abfd); 5117 sym_hashes = elf_sym_hashes (abfd); 5118 local_got_refcounts = elf_local_got_refcounts (abfd); 5119 got2 = bfd_get_section_by_name (abfd, ".got2"); 5120 5121 relend = relocs + sec->reloc_count; 5122 for (rel = relocs; rel < relend; rel++) 5123 { 5124 unsigned long r_symndx; 5125 enum elf_ppc_reloc_type r_type; 5126 struct elf_link_hash_entry *h = NULL; 5127 5128 r_symndx = ELF32_R_SYM (rel->r_info); 5129 if (r_symndx >= symtab_hdr->sh_info) 5130 { 5131 struct elf_dyn_relocs **pp, *p; 5132 struct ppc_elf_link_hash_entry *eh; 5133 5134 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 5135 while (h->root.type == bfd_link_hash_indirect 5136 || h->root.type == bfd_link_hash_warning) 5137 h = (struct elf_link_hash_entry *) h->root.u.i.link; 5138 eh = (struct ppc_elf_link_hash_entry *) h; 5139 5140 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) 5141 if (p->sec == sec) 5142 { 5143 /* Everything must go for SEC. */ 5144 *pp = p->next; 5145 break; 5146 } 5147 } 5148 5149 r_type = ELF32_R_TYPE (rel->r_info); 5150 if (!htab->is_vxworks 5151 && h == NULL 5152 && local_got_refcounts != NULL 5153 && (!bfd_link_pic (info) 5154 || is_branch_reloc (r_type))) 5155 { 5156 struct plt_entry **local_plt = (struct plt_entry **) 5157 (local_got_refcounts + symtab_hdr->sh_info); 5158 char *local_got_tls_masks = (char *) 5159 (local_plt + symtab_hdr->sh_info); 5160 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0) 5161 { 5162 struct plt_entry **ifunc = local_plt + r_symndx; 5163 bfd_vma addend = 0; 5164 struct plt_entry *ent; 5165 5166 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info)) 5167 addend = rel->r_addend; 5168 ent = find_plt_ent (ifunc, got2, addend); 5169 if (ent->plt.refcount > 0) 5170 ent->plt.refcount -= 1; 5171 continue; 5172 } 5173 } 5174 5175 switch (r_type) 5176 { 5177 case R_PPC_GOT_TLSLD16: 5178 case R_PPC_GOT_TLSLD16_LO: 5179 case R_PPC_GOT_TLSLD16_HI: 5180 case R_PPC_GOT_TLSLD16_HA: 5181 case R_PPC_GOT_TLSGD16: 5182 case R_PPC_GOT_TLSGD16_LO: 5183 case R_PPC_GOT_TLSGD16_HI: 5184 case R_PPC_GOT_TLSGD16_HA: 5185 case R_PPC_GOT_TPREL16: 5186 case R_PPC_GOT_TPREL16_LO: 5187 case R_PPC_GOT_TPREL16_HI: 5188 case R_PPC_GOT_TPREL16_HA: 5189 case R_PPC_GOT_DTPREL16: 5190 case R_PPC_GOT_DTPREL16_LO: 5191 case R_PPC_GOT_DTPREL16_HI: 5192 case R_PPC_GOT_DTPREL16_HA: 5193 case R_PPC_GOT16: 5194 case R_PPC_GOT16_LO: 5195 case R_PPC_GOT16_HI: 5196 case R_PPC_GOT16_HA: 5197 if (h != NULL) 5198 { 5199 if (h->got.refcount > 0) 5200 h->got.refcount--; 5201 if (!bfd_link_pic (info)) 5202 { 5203 struct plt_entry *ent; 5204 5205 ent = find_plt_ent (&h->plt.plist, NULL, 0); 5206 if (ent != NULL && ent->plt.refcount > 0) 5207 ent->plt.refcount -= 1; 5208 } 5209 } 5210 else if (local_got_refcounts != NULL) 5211 { 5212 if (local_got_refcounts[r_symndx] > 0) 5213 local_got_refcounts[r_symndx]--; 5214 } 5215 break; 5216 5217 case R_PPC_REL24: 5218 case R_PPC_REL14: 5219 case R_PPC_REL14_BRTAKEN: 5220 case R_PPC_REL14_BRNTAKEN: 5221 case R_PPC_REL32: 5222 if (h == NULL || h == htab->elf.hgot) 5223 break; 5224 /* Fall through. */ 5225 5226 case R_PPC_ADDR32: 5227 case R_PPC_ADDR24: 5228 case R_PPC_ADDR16: 5229 case R_PPC_ADDR16_LO: 5230 case R_PPC_ADDR16_HI: 5231 case R_PPC_ADDR16_HA: 5232 case R_PPC_ADDR14: 5233 case R_PPC_ADDR14_BRTAKEN: 5234 case R_PPC_ADDR14_BRNTAKEN: 5235 case R_PPC_UADDR32: 5236 case R_PPC_UADDR16: 5237 if (bfd_link_pic (info)) 5238 break; 5239 /* Fall through. */ 5240 5241 case R_PPC_PLT32: 5242 case R_PPC_PLTREL24: 5243 case R_PPC_PLTREL32: 5244 case R_PPC_PLT16_LO: 5245 case R_PPC_PLT16_HI: 5246 case R_PPC_PLT16_HA: 5247 if (h != NULL) 5248 { 5249 bfd_vma addend = 0; 5250 struct plt_entry *ent; 5251 5252 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info)) 5253 addend = rel->r_addend; 5254 ent = find_plt_ent (&h->plt.plist, got2, addend); 5255 if (ent != NULL && ent->plt.refcount > 0) 5256 ent->plt.refcount -= 1; 5257 } 5258 break; 5259 5260 default: 5261 break; 5262 } 5263 } 5264 return TRUE; 5265 } 5266 5267 /* Set plt output section type, htab->tls_get_addr, and call the 5268 generic ELF tls_setup function. */ 5269 5270 asection * 5271 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info) 5272 { 5273 struct ppc_elf_link_hash_table *htab; 5274 5275 htab = ppc_elf_hash_table (info); 5276 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr", 5277 FALSE, FALSE, TRUE); 5278 if (htab->plt_type != PLT_NEW) 5279 htab->params->no_tls_get_addr_opt = TRUE; 5280 5281 if (!htab->params->no_tls_get_addr_opt) 5282 { 5283 struct elf_link_hash_entry *opt, *tga; 5284 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt", 5285 FALSE, FALSE, TRUE); 5286 if (opt != NULL 5287 && (opt->root.type == bfd_link_hash_defined 5288 || opt->root.type == bfd_link_hash_defweak)) 5289 { 5290 /* If glibc supports an optimized __tls_get_addr call stub, 5291 signalled by the presence of __tls_get_addr_opt, and we'll 5292 be calling __tls_get_addr via a plt call stub, then 5293 make __tls_get_addr point to __tls_get_addr_opt. */ 5294 tga = htab->tls_get_addr; 5295 if (htab->elf.dynamic_sections_created 5296 && tga != NULL 5297 && (tga->type == STT_FUNC 5298 || tga->needs_plt) 5299 && !(SYMBOL_CALLS_LOCAL (info, tga) 5300 || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT 5301 && tga->root.type == bfd_link_hash_undefweak))) 5302 { 5303 struct plt_entry *ent; 5304 for (ent = tga->plt.plist; ent != NULL; ent = ent->next) 5305 if (ent->plt.refcount > 0) 5306 break; 5307 if (ent != NULL) 5308 { 5309 tga->root.type = bfd_link_hash_indirect; 5310 tga->root.u.i.link = &opt->root; 5311 ppc_elf_copy_indirect_symbol (info, opt, tga); 5312 opt->mark = 1; 5313 if (opt->dynindx != -1) 5314 { 5315 /* Use __tls_get_addr_opt in dynamic relocations. */ 5316 opt->dynindx = -1; 5317 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, 5318 opt->dynstr_index); 5319 if (!bfd_elf_link_record_dynamic_symbol (info, opt)) 5320 return FALSE; 5321 } 5322 htab->tls_get_addr = opt; 5323 } 5324 } 5325 } 5326 else 5327 htab->params->no_tls_get_addr_opt = TRUE; 5328 } 5329 if (htab->plt_type == PLT_NEW 5330 && htab->elf.splt != NULL 5331 && htab->elf.splt->output_section != NULL) 5332 { 5333 elf_section_type (htab->elf.splt->output_section) = SHT_PROGBITS; 5334 elf_section_flags (htab->elf.splt->output_section) = SHF_ALLOC + SHF_WRITE; 5335 } 5336 5337 return _bfd_elf_tls_setup (obfd, info); 5338 } 5339 5340 /* Return TRUE iff REL is a branch reloc with a global symbol matching 5341 HASH. */ 5342 5343 static bfd_boolean 5344 branch_reloc_hash_match (const bfd *ibfd, 5345 const Elf_Internal_Rela *rel, 5346 const struct elf_link_hash_entry *hash) 5347 { 5348 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd); 5349 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info); 5350 unsigned int r_symndx = ELF32_R_SYM (rel->r_info); 5351 5352 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type)) 5353 { 5354 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); 5355 struct elf_link_hash_entry *h; 5356 5357 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 5358 while (h->root.type == bfd_link_hash_indirect 5359 || h->root.type == bfd_link_hash_warning) 5360 h = (struct elf_link_hash_entry *) h->root.u.i.link; 5361 if (h == hash) 5362 return TRUE; 5363 } 5364 return FALSE; 5365 } 5366 5367 /* Run through all the TLS relocs looking for optimization 5368 opportunities. */ 5369 5370 bfd_boolean 5371 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, 5372 struct bfd_link_info *info) 5373 { 5374 bfd *ibfd; 5375 asection *sec; 5376 struct ppc_elf_link_hash_table *htab; 5377 int pass; 5378 5379 if (!bfd_link_executable (info)) 5380 return TRUE; 5381 5382 htab = ppc_elf_hash_table (info); 5383 if (htab == NULL) 5384 return FALSE; 5385 5386 /* Make two passes through the relocs. First time check that tls 5387 relocs involved in setting up a tls_get_addr call are indeed 5388 followed by such a call. If they are not, don't do any tls 5389 optimization. On the second pass twiddle tls_mask flags to 5390 notify relocate_section that optimization can be done, and 5391 adjust got and plt refcounts. */ 5392 for (pass = 0; pass < 2; ++pass) 5393 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 5394 { 5395 Elf_Internal_Sym *locsyms = NULL; 5396 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd); 5397 asection *got2 = bfd_get_section_by_name (ibfd, ".got2"); 5398 5399 for (sec = ibfd->sections; sec != NULL; sec = sec->next) 5400 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section)) 5401 { 5402 Elf_Internal_Rela *relstart, *rel, *relend; 5403 int expecting_tls_get_addr = 0; 5404 5405 /* Read the relocations. */ 5406 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, 5407 info->keep_memory); 5408 if (relstart == NULL) 5409 return FALSE; 5410 5411 relend = relstart + sec->reloc_count; 5412 for (rel = relstart; rel < relend; rel++) 5413 { 5414 enum elf_ppc_reloc_type r_type; 5415 unsigned long r_symndx; 5416 struct elf_link_hash_entry *h = NULL; 5417 char *tls_mask; 5418 char tls_set, tls_clear; 5419 bfd_boolean is_local; 5420 bfd_signed_vma *got_count; 5421 5422 r_symndx = ELF32_R_SYM (rel->r_info); 5423 if (r_symndx >= symtab_hdr->sh_info) 5424 { 5425 struct elf_link_hash_entry **sym_hashes; 5426 5427 sym_hashes = elf_sym_hashes (ibfd); 5428 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 5429 while (h->root.type == bfd_link_hash_indirect 5430 || h->root.type == bfd_link_hash_warning) 5431 h = (struct elf_link_hash_entry *) h->root.u.i.link; 5432 } 5433 5434 is_local = FALSE; 5435 if (h == NULL 5436 || !h->def_dynamic) 5437 is_local = TRUE; 5438 5439 r_type = ELF32_R_TYPE (rel->r_info); 5440 /* If this section has old-style __tls_get_addr calls 5441 without marker relocs, then check that each 5442 __tls_get_addr call reloc is preceded by a reloc 5443 that conceivably belongs to the __tls_get_addr arg 5444 setup insn. If we don't find matching arg setup 5445 relocs, don't do any tls optimization. */ 5446 if (pass == 0 5447 && sec->has_tls_get_addr_call 5448 && h != NULL 5449 && h == htab->tls_get_addr 5450 && !expecting_tls_get_addr 5451 && is_branch_reloc (r_type)) 5452 { 5453 info->callbacks->minfo ("%H __tls_get_addr lost arg, " 5454 "TLS optimization disabled\n", 5455 ibfd, sec, rel->r_offset); 5456 if (elf_section_data (sec)->relocs != relstart) 5457 free (relstart); 5458 return TRUE; 5459 } 5460 5461 expecting_tls_get_addr = 0; 5462 switch (r_type) 5463 { 5464 case R_PPC_GOT_TLSLD16: 5465 case R_PPC_GOT_TLSLD16_LO: 5466 expecting_tls_get_addr = 1; 5467 /* Fall through. */ 5468 5469 case R_PPC_GOT_TLSLD16_HI: 5470 case R_PPC_GOT_TLSLD16_HA: 5471 /* These relocs should never be against a symbol 5472 defined in a shared lib. Leave them alone if 5473 that turns out to be the case. */ 5474 if (!is_local) 5475 continue; 5476 5477 /* LD -> LE */ 5478 tls_set = 0; 5479 tls_clear = TLS_LD; 5480 break; 5481 5482 case R_PPC_GOT_TLSGD16: 5483 case R_PPC_GOT_TLSGD16_LO: 5484 expecting_tls_get_addr = 1; 5485 /* Fall through. */ 5486 5487 case R_PPC_GOT_TLSGD16_HI: 5488 case R_PPC_GOT_TLSGD16_HA: 5489 if (is_local) 5490 /* GD -> LE */ 5491 tls_set = 0; 5492 else 5493 /* GD -> IE */ 5494 tls_set = TLS_TLS | TLS_TPRELGD; 5495 tls_clear = TLS_GD; 5496 break; 5497 5498 case R_PPC_GOT_TPREL16: 5499 case R_PPC_GOT_TPREL16_LO: 5500 case R_PPC_GOT_TPREL16_HI: 5501 case R_PPC_GOT_TPREL16_HA: 5502 if (is_local) 5503 { 5504 /* IE -> LE */ 5505 tls_set = 0; 5506 tls_clear = TLS_TPREL; 5507 break; 5508 } 5509 else 5510 continue; 5511 5512 case R_PPC_TLSGD: 5513 case R_PPC_TLSLD: 5514 expecting_tls_get_addr = 2; 5515 tls_set = 0; 5516 tls_clear = 0; 5517 break; 5518 5519 default: 5520 continue; 5521 } 5522 5523 if (pass == 0) 5524 { 5525 if (!expecting_tls_get_addr 5526 || (expecting_tls_get_addr == 1 5527 && !sec->has_tls_get_addr_call)) 5528 continue; 5529 5530 if (rel + 1 < relend 5531 && branch_reloc_hash_match (ibfd, rel + 1, 5532 htab->tls_get_addr)) 5533 continue; 5534 5535 /* Uh oh, we didn't find the expected call. We 5536 could just mark this symbol to exclude it 5537 from tls optimization but it's safer to skip 5538 the entire optimization. */ 5539 info->callbacks->minfo (_("%H arg lost __tls_get_addr, " 5540 "TLS optimization disabled\n"), 5541 ibfd, sec, rel->r_offset); 5542 if (elf_section_data (sec)->relocs != relstart) 5543 free (relstart); 5544 return TRUE; 5545 } 5546 5547 if (expecting_tls_get_addr) 5548 { 5549 struct plt_entry *ent; 5550 bfd_vma addend = 0; 5551 5552 if (bfd_link_pic (info) 5553 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24) 5554 addend = rel[1].r_addend; 5555 ent = find_plt_ent (&htab->tls_get_addr->plt.plist, 5556 got2, addend); 5557 if (ent != NULL && ent->plt.refcount > 0) 5558 ent->plt.refcount -= 1; 5559 5560 if (expecting_tls_get_addr == 2) 5561 continue; 5562 } 5563 5564 if (h != NULL) 5565 { 5566 tls_mask = &ppc_elf_hash_entry (h)->tls_mask; 5567 got_count = &h->got.refcount; 5568 } 5569 else 5570 { 5571 bfd_signed_vma *lgot_refs; 5572 struct plt_entry **local_plt; 5573 char *lgot_masks; 5574 5575 if (locsyms == NULL) 5576 { 5577 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; 5578 if (locsyms == NULL) 5579 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, 5580 symtab_hdr->sh_info, 5581 0, NULL, NULL, NULL); 5582 if (locsyms == NULL) 5583 { 5584 if (elf_section_data (sec)->relocs != relstart) 5585 free (relstart); 5586 return FALSE; 5587 } 5588 } 5589 lgot_refs = elf_local_got_refcounts (ibfd); 5590 if (lgot_refs == NULL) 5591 abort (); 5592 local_plt = (struct plt_entry **) 5593 (lgot_refs + symtab_hdr->sh_info); 5594 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info); 5595 tls_mask = &lgot_masks[r_symndx]; 5596 got_count = &lgot_refs[r_symndx]; 5597 } 5598 5599 if (tls_set == 0) 5600 { 5601 /* We managed to get rid of a got entry. */ 5602 if (*got_count > 0) 5603 *got_count -= 1; 5604 } 5605 5606 *tls_mask |= tls_set; 5607 *tls_mask &= ~tls_clear; 5608 } 5609 5610 if (elf_section_data (sec)->relocs != relstart) 5611 free (relstart); 5612 } 5613 5614 if (locsyms != NULL 5615 && (symtab_hdr->contents != (unsigned char *) locsyms)) 5616 { 5617 if (!info->keep_memory) 5618 free (locsyms); 5619 else 5620 symtab_hdr->contents = (unsigned char *) locsyms; 5621 } 5622 } 5623 return TRUE; 5624 } 5625 5626 /* Return true if we have dynamic relocs that apply to read-only sections. */ 5627 5628 static bfd_boolean 5629 readonly_dynrelocs (struct elf_link_hash_entry *h) 5630 { 5631 struct elf_dyn_relocs *p; 5632 5633 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next) 5634 { 5635 asection *s = p->sec->output_section; 5636 5637 if (s != NULL 5638 && ((s->flags & (SEC_READONLY | SEC_ALLOC)) 5639 == (SEC_READONLY | SEC_ALLOC))) 5640 return TRUE; 5641 } 5642 return FALSE; 5643 } 5644 5645 /* Adjust a symbol defined by a dynamic object and referenced by a 5646 regular object. The current definition is in some section of the 5647 dynamic object, but we're not including those sections. We have to 5648 change the definition to something the rest of the link can 5649 understand. */ 5650 5651 static bfd_boolean 5652 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info, 5653 struct elf_link_hash_entry *h) 5654 { 5655 struct ppc_elf_link_hash_table *htab; 5656 asection *s; 5657 5658 #ifdef DEBUG 5659 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n", 5660 h->root.root.string); 5661 #endif 5662 5663 /* Make sure we know what is going on here. */ 5664 htab = ppc_elf_hash_table (info); 5665 BFD_ASSERT (htab->elf.dynobj != NULL 5666 && (h->needs_plt 5667 || h->type == STT_GNU_IFUNC 5668 || h->u.weakdef != NULL 5669 || (h->def_dynamic 5670 && h->ref_regular 5671 && !h->def_regular))); 5672 5673 /* Deal with function syms. */ 5674 if (h->type == STT_FUNC 5675 || h->type == STT_GNU_IFUNC 5676 || h->needs_plt) 5677 { 5678 /* Clear procedure linkage table information for any symbol that 5679 won't need a .plt entry. */ 5680 struct plt_entry *ent; 5681 for (ent = h->plt.plist; ent != NULL; ent = ent->next) 5682 if (ent->plt.refcount > 0) 5683 break; 5684 if (ent == NULL 5685 || (h->type != STT_GNU_IFUNC 5686 && (SYMBOL_CALLS_LOCAL (info, h) 5687 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 5688 && h->root.type == bfd_link_hash_undefweak)))) 5689 { 5690 /* A PLT entry is not required/allowed when: 5691 5692 1. We are not using ld.so; because then the PLT entry 5693 can't be set up, so we can't use one. In this case, 5694 ppc_elf_adjust_dynamic_symbol won't even be called. 5695 5696 2. GC has rendered the entry unused. 5697 5698 3. We know for certain that a call to this symbol 5699 will go to this object, or will remain undefined. */ 5700 h->plt.plist = NULL; 5701 h->needs_plt = 0; 5702 h->pointer_equality_needed = 0; 5703 } 5704 else 5705 { 5706 /* Taking a function's address in a read/write section 5707 doesn't require us to define the function symbol in the 5708 executable on a plt call stub. A dynamic reloc can 5709 be used instead, giving better runtime performance. 5710 (Calls via that function pointer don't need to bounce 5711 through the plt call stub.) Similarly, use a dynamic 5712 reloc for a weak reference when possible, allowing the 5713 resolution of the symbol to be set at load time rather 5714 than link time. */ 5715 if ((h->pointer_equality_needed 5716 || (!h->ref_regular_nonweak && h->non_got_ref)) 5717 && !htab->is_vxworks 5718 && !ppc_elf_hash_entry (h)->has_sda_refs 5719 && !readonly_dynrelocs (h)) 5720 { 5721 h->pointer_equality_needed = 0; 5722 /* After adjust_dynamic_symbol, non_got_ref set in the 5723 non-pic case means that dyn_relocs for this symbol 5724 should be discarded. */ 5725 h->non_got_ref = 0; 5726 } 5727 } 5728 h->protected_def = 0; 5729 return TRUE; 5730 } 5731 else 5732 h->plt.plist = NULL; 5733 5734 /* If this is a weak symbol, and there is a real definition, the 5735 processor independent code will have arranged for us to see the 5736 real definition first, and we can just use the same value. */ 5737 if (h->u.weakdef != NULL) 5738 { 5739 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined 5740 || h->u.weakdef->root.type == bfd_link_hash_defweak); 5741 h->root.u.def.section = h->u.weakdef->root.u.def.section; 5742 h->root.u.def.value = h->u.weakdef->root.u.def.value; 5743 if (ELIMINATE_COPY_RELOCS) 5744 h->non_got_ref = h->u.weakdef->non_got_ref; 5745 return TRUE; 5746 } 5747 5748 /* This is a reference to a symbol defined by a dynamic object which 5749 is not a function. */ 5750 5751 /* If we are creating a shared library, we must presume that the 5752 only references to the symbol are via the global offset table. 5753 For such cases we need not do anything here; the relocations will 5754 be handled correctly by relocate_section. */ 5755 if (bfd_link_pic (info)) 5756 { 5757 h->protected_def = 0; 5758 return TRUE; 5759 } 5760 5761 /* If there are no references to this symbol that do not use the 5762 GOT, we don't need to generate a copy reloc. */ 5763 if (!h->non_got_ref) 5764 { 5765 h->protected_def = 0; 5766 return TRUE; 5767 } 5768 5769 /* Protected variables do not work with .dynbss. The copy in 5770 .dynbss won't be used by the shared library with the protected 5771 definition for the variable. Editing to PIC, or text relocations 5772 are preferable to an incorrect program. */ 5773 if (h->protected_def) 5774 { 5775 if (ELIMINATE_COPY_RELOCS 5776 && ppc_elf_hash_entry (h)->has_addr16_ha 5777 && ppc_elf_hash_entry (h)->has_addr16_lo 5778 && htab->params->pic_fixup == 0 5779 && info->disable_target_specific_optimizations <= 1) 5780 htab->params->pic_fixup = 1; 5781 h->non_got_ref = 0; 5782 return TRUE; 5783 } 5784 5785 /* If -z nocopyreloc was given, we won't generate them either. */ 5786 if (info->nocopyreloc) 5787 { 5788 h->non_got_ref = 0; 5789 return TRUE; 5790 } 5791 5792 /* If we didn't find any dynamic relocs in read-only sections, then 5793 we'll be keeping the dynamic relocs and avoiding the copy reloc. 5794 We can't do this if there are any small data relocations. This 5795 doesn't work on VxWorks, where we can not have dynamic 5796 relocations (other than copy and jump slot relocations) in an 5797 executable. */ 5798 if (ELIMINATE_COPY_RELOCS 5799 && !ppc_elf_hash_entry (h)->has_sda_refs 5800 && !htab->is_vxworks 5801 && !h->def_regular 5802 && !readonly_dynrelocs (h)) 5803 { 5804 h->non_got_ref = 0; 5805 return TRUE; 5806 } 5807 5808 /* We must allocate the symbol in our .dynbss section, which will 5809 become part of the .bss section of the executable. There will be 5810 an entry for this symbol in the .dynsym section. The dynamic 5811 object will contain position independent code, so all references 5812 from the dynamic object to this symbol will go through the global 5813 offset table. The dynamic linker will use the .dynsym entry to 5814 determine the address it must put in the global offset table, so 5815 both the dynamic object and the regular object will refer to the 5816 same memory location for the variable. 5817 5818 Of course, if the symbol is referenced using SDAREL relocs, we 5819 must instead allocate it in .sbss. */ 5820 5821 if (ppc_elf_hash_entry (h)->has_sda_refs) 5822 s = htab->dynsbss; 5823 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0) 5824 s = htab->elf.sdynrelro; 5825 else 5826 s = htab->elf.sdynbss; 5827 BFD_ASSERT (s != NULL); 5828 5829 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to 5830 copy the initial value out of the dynamic object and into the 5831 runtime process image. We need to remember the offset into the 5832 .rela.bss section we are going to use. */ 5833 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) 5834 { 5835 asection *srel; 5836 5837 if (ppc_elf_hash_entry (h)->has_sda_refs) 5838 srel = htab->relsbss; 5839 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0) 5840 srel = htab->elf.sreldynrelro; 5841 else 5842 srel = htab->elf.srelbss; 5843 BFD_ASSERT (srel != NULL); 5844 srel->size += sizeof (Elf32_External_Rela); 5845 h->needs_copy = 1; 5846 } 5847 5848 return _bfd_elf_adjust_dynamic_copy (info, h, s); 5849 } 5850 5851 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is 5852 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0, 5853 specifying the addend on the plt relocation. For -fpic code, the sym 5854 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC 5855 xxxxxxxx.got2.plt_pic32.<callee>. */ 5856 5857 static bfd_boolean 5858 add_stub_sym (struct plt_entry *ent, 5859 struct elf_link_hash_entry *h, 5860 struct bfd_link_info *info) 5861 { 5862 struct elf_link_hash_entry *sh; 5863 size_t len1, len2, len3; 5864 char *name; 5865 const char *stub; 5866 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 5867 5868 if (bfd_link_pic (info)) 5869 stub = ".plt_pic32."; 5870 else 5871 stub = ".plt_call32."; 5872 5873 len1 = strlen (h->root.root.string); 5874 len2 = strlen (stub); 5875 len3 = 0; 5876 if (ent->sec) 5877 len3 = strlen (ent->sec->name); 5878 name = bfd_malloc (len1 + len2 + len3 + 9); 5879 if (name == NULL) 5880 return FALSE; 5881 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff); 5882 if (ent->sec) 5883 memcpy (name + 8, ent->sec->name, len3); 5884 memcpy (name + 8 + len3, stub, len2); 5885 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1); 5886 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE); 5887 if (sh == NULL) 5888 return FALSE; 5889 if (sh->root.type == bfd_link_hash_new) 5890 { 5891 sh->root.type = bfd_link_hash_defined; 5892 sh->root.u.def.section = htab->glink; 5893 sh->root.u.def.value = ent->glink_offset; 5894 sh->ref_regular = 1; 5895 sh->def_regular = 1; 5896 sh->ref_regular_nonweak = 1; 5897 sh->forced_local = 1; 5898 sh->non_elf = 0; 5899 sh->root.linker_def = 1; 5900 } 5901 return TRUE; 5902 } 5903 5904 /* Allocate NEED contiguous space in .got, and return the offset. 5905 Handles allocation of the got header when crossing 32k. */ 5906 5907 static bfd_vma 5908 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need) 5909 { 5910 bfd_vma where; 5911 unsigned int max_before_header; 5912 5913 if (htab->plt_type == PLT_VXWORKS) 5914 { 5915 where = htab->elf.sgot->size; 5916 htab->elf.sgot->size += need; 5917 } 5918 else 5919 { 5920 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764; 5921 if (need <= htab->got_gap) 5922 { 5923 where = max_before_header - htab->got_gap; 5924 htab->got_gap -= need; 5925 } 5926 else 5927 { 5928 if (htab->elf.sgot->size + need > max_before_header 5929 && htab->elf.sgot->size <= max_before_header) 5930 { 5931 htab->got_gap = max_before_header - htab->elf.sgot->size; 5932 htab->elf.sgot->size = max_before_header + htab->got_header_size; 5933 } 5934 where = htab->elf.sgot->size; 5935 htab->elf.sgot->size += need; 5936 } 5937 } 5938 return where; 5939 } 5940 5941 /* If H is undefined weak, make it dynamic if that makes sense. */ 5942 5943 static bfd_boolean 5944 ensure_undefweak_dynamic (struct bfd_link_info *info, 5945 struct elf_link_hash_entry *h) 5946 { 5947 struct elf_link_hash_table *htab = elf_hash_table (info); 5948 5949 if (htab->dynamic_sections_created 5950 && h->root.type == bfd_link_hash_undefweak 5951 && h->dynindx == -1 5952 && !h->forced_local 5953 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) 5954 return bfd_elf_link_record_dynamic_symbol (info, h); 5955 return TRUE; 5956 } 5957 5958 /* Allocate space in associated reloc sections for dynamic relocs. */ 5959 5960 static bfd_boolean 5961 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) 5962 { 5963 struct bfd_link_info *info = inf; 5964 struct ppc_elf_link_hash_entry *eh; 5965 struct ppc_elf_link_hash_table *htab; 5966 struct elf_dyn_relocs *p; 5967 bfd_boolean dyn; 5968 5969 if (h->root.type == bfd_link_hash_indirect) 5970 return TRUE; 5971 5972 htab = ppc_elf_hash_table (info); 5973 eh = (struct ppc_elf_link_hash_entry *) h; 5974 if (eh->elf.got.refcount > 0 5975 || (ELIMINATE_COPY_RELOCS 5976 && !eh->elf.def_regular 5977 && eh->elf.protected_def 5978 && eh->has_addr16_ha 5979 && eh->has_addr16_lo 5980 && htab->params->pic_fixup > 0)) 5981 { 5982 unsigned int need; 5983 5984 /* Make sure this symbol is output as a dynamic symbol. 5985 Undefined weak syms won't yet be marked as dynamic. */ 5986 if (!ensure_undefweak_dynamic (info, &eh->elf)) 5987 return FALSE; 5988 5989 need = 0; 5990 if ((eh->tls_mask & TLS_TLS) != 0) 5991 { 5992 if ((eh->tls_mask & TLS_LD) != 0) 5993 { 5994 if (!eh->elf.def_dynamic) 5995 /* We'll just use htab->tlsld_got.offset. This should 5996 always be the case. It's a little odd if we have 5997 a local dynamic reloc against a non-local symbol. */ 5998 htab->tlsld_got.refcount += 1; 5999 else 6000 need += 8; 6001 } 6002 if ((eh->tls_mask & TLS_GD) != 0) 6003 need += 8; 6004 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0) 6005 need += 4; 6006 if ((eh->tls_mask & TLS_DTPREL) != 0) 6007 need += 4; 6008 } 6009 else 6010 need += 4; 6011 if (need == 0) 6012 eh->elf.got.offset = (bfd_vma) -1; 6013 else 6014 { 6015 eh->elf.got.offset = allocate_got (htab, need); 6016 if ((bfd_link_pic (info) 6017 || (htab->elf.dynamic_sections_created 6018 && eh->elf.dynindx != -1 6019 && !SYMBOL_REFERENCES_LOCAL (info, &eh->elf))) 6020 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT 6021 || eh->elf.root.type != bfd_link_hash_undefweak)) 6022 { 6023 asection *rsec = htab->elf.srelgot; 6024 6025 if (eh->elf.type == STT_GNU_IFUNC) 6026 rsec = htab->elf.irelplt; 6027 /* All the entries we allocated need relocs. 6028 Except LD only needs one. */ 6029 if ((eh->tls_mask & TLS_LD) != 0 6030 && eh->elf.def_dynamic) 6031 need -= 4; 6032 rsec->size += need * (sizeof (Elf32_External_Rela) / 4); 6033 } 6034 } 6035 } 6036 else 6037 eh->elf.got.offset = (bfd_vma) -1; 6038 6039 if (!htab->elf.dynamic_sections_created 6040 && h->type != STT_GNU_IFUNC) 6041 eh->dyn_relocs = NULL; 6042 6043 if (eh->dyn_relocs == NULL) 6044 ; 6045 6046 /* In the shared -Bsymbolic case, discard space allocated for 6047 dynamic pc-relative relocs against symbols which turn out to be 6048 defined in regular objects. For the normal shared case, discard 6049 space for relocs that have become local due to symbol visibility 6050 changes. */ 6051 else if (bfd_link_pic (info)) 6052 { 6053 /* Relocs that use pc_count are those that appear on a call insn, 6054 or certain REL relocs (see must_be_dyn_reloc) that can be 6055 generated via assembly. We want calls to protected symbols to 6056 resolve directly to the function rather than going via the plt. 6057 If people want function pointer comparisons to work as expected 6058 then they should avoid writing weird assembly. */ 6059 if (SYMBOL_CALLS_LOCAL (info, h)) 6060 { 6061 struct elf_dyn_relocs **pp; 6062 6063 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) 6064 { 6065 p->count -= p->pc_count; 6066 p->pc_count = 0; 6067 if (p->count == 0) 6068 *pp = p->next; 6069 else 6070 pp = &p->next; 6071 } 6072 } 6073 6074 if (htab->is_vxworks) 6075 { 6076 struct elf_dyn_relocs **pp; 6077 6078 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) 6079 { 6080 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0) 6081 *pp = p->next; 6082 else 6083 pp = &p->next; 6084 } 6085 } 6086 6087 /* Discard relocs on undefined symbols that must be local. */ 6088 if (eh->dyn_relocs != NULL 6089 && h->root.type == bfd_link_hash_undefined 6090 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN 6091 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL)) 6092 eh->dyn_relocs = NULL; 6093 6094 /* Also discard relocs on undefined weak syms with non-default 6095 visibility. */ 6096 if (eh->dyn_relocs != NULL 6097 && h->root.type == bfd_link_hash_undefweak) 6098 { 6099 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 6100 eh->dyn_relocs = NULL; 6101 6102 /* Make sure undefined weak symbols are output as a dynamic 6103 symbol in PIEs. */ 6104 else if (!ensure_undefweak_dynamic (info, h)) 6105 return FALSE; 6106 } 6107 } 6108 else if (ELIMINATE_COPY_RELOCS) 6109 { 6110 /* For the non-pic case, discard space for relocs against 6111 symbols which turn out to need copy relocs or are not 6112 dynamic. */ 6113 if (!h->non_got_ref 6114 && !h->def_regular 6115 && !(h->protected_def 6116 && eh->has_addr16_ha 6117 && eh->has_addr16_lo 6118 && htab->params->pic_fixup > 0)) 6119 { 6120 /* Make sure this symbol is output as a dynamic symbol. 6121 Undefined weak syms won't yet be marked as dynamic. */ 6122 if (!ensure_undefweak_dynamic (info, h)) 6123 return FALSE; 6124 6125 if (h->dynindx == -1) 6126 eh->dyn_relocs = NULL; 6127 } 6128 else 6129 eh->dyn_relocs = NULL; 6130 } 6131 6132 /* Allocate space. */ 6133 for (p = eh->dyn_relocs; p != NULL; p = p->next) 6134 { 6135 asection *sreloc = elf_section_data (p->sec)->sreloc; 6136 if (eh->elf.type == STT_GNU_IFUNC) 6137 sreloc = htab->elf.irelplt; 6138 sreloc->size += p->count * sizeof (Elf32_External_Rela); 6139 } 6140 6141 /* Handle PLT relocs. Done last, after dynindx has settled. */ 6142 dyn = htab->elf.dynamic_sections_created && h->dynindx != -1; 6143 if (dyn || h->type == STT_GNU_IFUNC) 6144 { 6145 struct plt_entry *ent; 6146 bfd_boolean doneone = FALSE; 6147 bfd_vma plt_offset = 0, glink_offset = 0; 6148 6149 for (ent = h->plt.plist; ent != NULL; ent = ent->next) 6150 if (ent->plt.refcount > 0) 6151 { 6152 asection *s = htab->elf.splt; 6153 6154 if (!dyn) 6155 s = htab->elf.iplt; 6156 6157 if (htab->plt_type == PLT_NEW || !dyn) 6158 { 6159 if (!doneone) 6160 { 6161 plt_offset = s->size; 6162 s->size += 4; 6163 } 6164 ent->plt.offset = plt_offset; 6165 6166 s = htab->glink; 6167 if (!doneone || bfd_link_pic (info)) 6168 { 6169 glink_offset = s->size; 6170 s->size += GLINK_ENTRY_SIZE; 6171 if (h == htab->tls_get_addr 6172 && !htab->params->no_tls_get_addr_opt) 6173 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE; 6174 } 6175 if (!doneone 6176 && !bfd_link_pic (info) 6177 && h->def_dynamic 6178 && !h->def_regular) 6179 { 6180 h->root.u.def.section = s; 6181 h->root.u.def.value = glink_offset; 6182 } 6183 ent->glink_offset = glink_offset; 6184 6185 if (htab->params->emit_stub_syms 6186 && !add_stub_sym (ent, h, info)) 6187 return FALSE; 6188 } 6189 else 6190 { 6191 if (!doneone) 6192 { 6193 /* If this is the first .plt entry, make room 6194 for the special first entry. */ 6195 if (s->size == 0) 6196 s->size += htab->plt_initial_entry_size; 6197 6198 /* The PowerPC PLT is actually composed of two 6199 parts, the first part is 2 words (for a load 6200 and a jump), and then there is a remaining 6201 word available at the end. */ 6202 plt_offset = (htab->plt_initial_entry_size 6203 + (htab->plt_slot_size 6204 * ((s->size 6205 - htab->plt_initial_entry_size) 6206 / htab->plt_entry_size))); 6207 6208 /* If this symbol is not defined in a regular 6209 file, and we are not generating a shared 6210 library, then set the symbol to this location 6211 in the .plt. This is to avoid text 6212 relocations, and is required to make 6213 function pointers compare as equal between 6214 the normal executable and the shared library. */ 6215 if (! bfd_link_pic (info) 6216 && h->def_dynamic 6217 && !h->def_regular) 6218 { 6219 h->root.u.def.section = s; 6220 h->root.u.def.value = plt_offset; 6221 } 6222 6223 /* Make room for this entry. */ 6224 s->size += htab->plt_entry_size; 6225 /* After the 8192nd entry, room for two entries 6226 is allocated. */ 6227 if (htab->plt_type == PLT_OLD 6228 && (s->size - htab->plt_initial_entry_size) 6229 / htab->plt_entry_size 6230 > PLT_NUM_SINGLE_ENTRIES) 6231 s->size += htab->plt_entry_size; 6232 } 6233 ent->plt.offset = plt_offset; 6234 } 6235 6236 /* We also need to make an entry in the .rela.plt section. */ 6237 if (!doneone) 6238 { 6239 if (!dyn) 6240 htab->elf.irelplt->size += sizeof (Elf32_External_Rela); 6241 else 6242 { 6243 htab->elf.srelplt->size += sizeof (Elf32_External_Rela); 6244 6245 if (htab->plt_type == PLT_VXWORKS) 6246 { 6247 /* Allocate space for the unloaded relocations. */ 6248 if (!bfd_link_pic (info) 6249 && htab->elf.dynamic_sections_created) 6250 { 6251 if (ent->plt.offset 6252 == (bfd_vma) htab->plt_initial_entry_size) 6253 { 6254 htab->srelplt2->size 6255 += (sizeof (Elf32_External_Rela) 6256 * VXWORKS_PLTRESOLVE_RELOCS); 6257 } 6258 6259 htab->srelplt2->size 6260 += (sizeof (Elf32_External_Rela) 6261 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS); 6262 } 6263 6264 /* Every PLT entry has an associated GOT entry in 6265 .got.plt. */ 6266 htab->elf.sgotplt->size += 4; 6267 } 6268 } 6269 doneone = TRUE; 6270 } 6271 } 6272 else 6273 ent->plt.offset = (bfd_vma) -1; 6274 6275 if (!doneone) 6276 { 6277 h->plt.plist = NULL; 6278 h->needs_plt = 0; 6279 } 6280 } 6281 else 6282 { 6283 h->plt.plist = NULL; 6284 h->needs_plt = 0; 6285 } 6286 6287 return TRUE; 6288 } 6289 6290 /* Set DF_TEXTREL if we find any dynamic relocs that apply to 6291 read-only sections. */ 6292 6293 static bfd_boolean 6294 maybe_set_textrel (struct elf_link_hash_entry *h, void *info) 6295 { 6296 if (h->root.type == bfd_link_hash_indirect) 6297 return TRUE; 6298 6299 if (readonly_dynrelocs (h)) 6300 { 6301 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL; 6302 6303 /* Not an error, just cut short the traversal. */ 6304 return FALSE; 6305 } 6306 return TRUE; 6307 } 6308 6309 static const unsigned char glink_eh_frame_cie[] = 6310 { 6311 0, 0, 0, 16, /* length. */ 6312 0, 0, 0, 0, /* id. */ 6313 1, /* CIE version. */ 6314 'z', 'R', 0, /* Augmentation string. */ 6315 4, /* Code alignment. */ 6316 0x7c, /* Data alignment. */ 6317 65, /* RA reg. */ 6318 1, /* Augmentation size. */ 6319 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */ 6320 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */ 6321 }; 6322 6323 /* Set the sizes of the dynamic sections. */ 6324 6325 static bfd_boolean 6326 ppc_elf_size_dynamic_sections (bfd *output_bfd, 6327 struct bfd_link_info *info) 6328 { 6329 struct ppc_elf_link_hash_table *htab; 6330 asection *s; 6331 bfd_boolean relocs; 6332 bfd *ibfd; 6333 6334 #ifdef DEBUG 6335 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n"); 6336 #endif 6337 6338 htab = ppc_elf_hash_table (info); 6339 BFD_ASSERT (htab->elf.dynobj != NULL); 6340 6341 if (elf_hash_table (info)->dynamic_sections_created) 6342 { 6343 /* Set the contents of the .interp section to the interpreter. */ 6344 if (bfd_link_executable (info) && !info->nointerp) 6345 { 6346 s = bfd_get_linker_section (htab->elf.dynobj, ".interp"); 6347 BFD_ASSERT (s != NULL); 6348 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 6349 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 6350 } 6351 } 6352 6353 if (htab->plt_type == PLT_OLD) 6354 htab->got_header_size = 16; 6355 else if (htab->plt_type == PLT_NEW) 6356 htab->got_header_size = 12; 6357 6358 /* Set up .got offsets for local syms, and space for local dynamic 6359 relocs. */ 6360 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 6361 { 6362 bfd_signed_vma *local_got; 6363 bfd_signed_vma *end_local_got; 6364 struct plt_entry **local_plt; 6365 struct plt_entry **end_local_plt; 6366 char *lgot_masks; 6367 bfd_size_type locsymcount; 6368 Elf_Internal_Shdr *symtab_hdr; 6369 6370 if (!is_ppc_elf (ibfd)) 6371 continue; 6372 6373 for (s = ibfd->sections; s != NULL; s = s->next) 6374 { 6375 struct ppc_dyn_relocs *p; 6376 6377 for (p = ((struct ppc_dyn_relocs *) 6378 elf_section_data (s)->local_dynrel); 6379 p != NULL; 6380 p = p->next) 6381 { 6382 if (!bfd_is_abs_section (p->sec) 6383 && bfd_is_abs_section (p->sec->output_section)) 6384 { 6385 /* Input section has been discarded, either because 6386 it is a copy of a linkonce section or due to 6387 linker script /DISCARD/, so we'll be discarding 6388 the relocs too. */ 6389 } 6390 else if (htab->is_vxworks 6391 && strcmp (p->sec->output_section->name, 6392 ".tls_vars") == 0) 6393 { 6394 /* Relocations in vxworks .tls_vars sections are 6395 handled specially by the loader. */ 6396 } 6397 else if (p->count != 0) 6398 { 6399 asection *sreloc = elf_section_data (p->sec)->sreloc; 6400 if (p->ifunc) 6401 sreloc = htab->elf.irelplt; 6402 sreloc->size += p->count * sizeof (Elf32_External_Rela); 6403 if ((p->sec->output_section->flags 6404 & (SEC_READONLY | SEC_ALLOC)) 6405 == (SEC_READONLY | SEC_ALLOC)) 6406 info->flags |= DF_TEXTREL; 6407 } 6408 } 6409 } 6410 6411 local_got = elf_local_got_refcounts (ibfd); 6412 if (!local_got) 6413 continue; 6414 6415 symtab_hdr = &elf_symtab_hdr (ibfd); 6416 locsymcount = symtab_hdr->sh_info; 6417 end_local_got = local_got + locsymcount; 6418 local_plt = (struct plt_entry **) end_local_got; 6419 end_local_plt = local_plt + locsymcount; 6420 lgot_masks = (char *) end_local_plt; 6421 6422 for (; local_got < end_local_got; ++local_got, ++lgot_masks) 6423 if (*local_got > 0) 6424 { 6425 unsigned int need = 0; 6426 if ((*lgot_masks & TLS_TLS) != 0) 6427 { 6428 if ((*lgot_masks & TLS_GD) != 0) 6429 need += 8; 6430 if ((*lgot_masks & TLS_LD) != 0) 6431 htab->tlsld_got.refcount += 1; 6432 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0) 6433 need += 4; 6434 if ((*lgot_masks & TLS_DTPREL) != 0) 6435 need += 4; 6436 } 6437 else 6438 need += 4; 6439 if (need == 0) 6440 *local_got = (bfd_vma) -1; 6441 else 6442 { 6443 *local_got = allocate_got (htab, need); 6444 if (bfd_link_pic (info)) 6445 { 6446 asection *srel = htab->elf.srelgot; 6447 if ((*lgot_masks & PLT_IFUNC) != 0) 6448 srel = htab->elf.irelplt; 6449 srel->size += need * (sizeof (Elf32_External_Rela) / 4); 6450 } 6451 } 6452 } 6453 else 6454 *local_got = (bfd_vma) -1; 6455 6456 if (htab->is_vxworks) 6457 continue; 6458 6459 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */ 6460 for (; local_plt < end_local_plt; ++local_plt) 6461 { 6462 struct plt_entry *ent; 6463 bfd_boolean doneone = FALSE; 6464 bfd_vma plt_offset = 0, glink_offset = 0; 6465 6466 for (ent = *local_plt; ent != NULL; ent = ent->next) 6467 if (ent->plt.refcount > 0) 6468 { 6469 s = htab->elf.iplt; 6470 6471 if (!doneone) 6472 { 6473 plt_offset = s->size; 6474 s->size += 4; 6475 } 6476 ent->plt.offset = plt_offset; 6477 6478 s = htab->glink; 6479 if (!doneone || bfd_link_pic (info)) 6480 { 6481 glink_offset = s->size; 6482 s->size += GLINK_ENTRY_SIZE; 6483 } 6484 ent->glink_offset = glink_offset; 6485 6486 if (!doneone) 6487 { 6488 htab->elf.irelplt->size += sizeof (Elf32_External_Rela); 6489 doneone = TRUE; 6490 } 6491 } 6492 else 6493 ent->plt.offset = (bfd_vma) -1; 6494 } 6495 } 6496 6497 /* Allocate space for global sym dynamic relocs. */ 6498 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info); 6499 6500 if (htab->tlsld_got.refcount > 0) 6501 { 6502 htab->tlsld_got.offset = allocate_got (htab, 8); 6503 if (bfd_link_pic (info)) 6504 htab->elf.srelgot->size += sizeof (Elf32_External_Rela); 6505 } 6506 else 6507 htab->tlsld_got.offset = (bfd_vma) -1; 6508 6509 if (htab->elf.sgot != NULL && htab->plt_type != PLT_VXWORKS) 6510 { 6511 unsigned int g_o_t = 32768; 6512 6513 /* If we haven't allocated the header, do so now. When we get here, 6514 for old plt/got the got size will be 0 to 32764 (not allocated), 6515 or 32780 to 65536 (header allocated). For new plt/got, the 6516 corresponding ranges are 0 to 32768 and 32780 to 65536. */ 6517 if (htab->elf.sgot->size <= 32768) 6518 { 6519 g_o_t = htab->elf.sgot->size; 6520 if (htab->plt_type == PLT_OLD) 6521 g_o_t += 4; 6522 htab->elf.sgot->size += htab->got_header_size; 6523 } 6524 6525 htab->elf.hgot->root.u.def.value = g_o_t; 6526 } 6527 if (bfd_link_pic (info)) 6528 { 6529 struct elf_link_hash_entry *sda = htab->sdata[0].sym; 6530 6531 sda->root.u.def.section = htab->elf.hgot->root.u.def.section; 6532 sda->root.u.def.value = htab->elf.hgot->root.u.def.value; 6533 } 6534 if (info->emitrelocations) 6535 { 6536 struct elf_link_hash_entry *sda = htab->sdata[0].sym; 6537 6538 if (sda != NULL && sda->ref_regular) 6539 sda->root.u.def.section->flags |= SEC_KEEP; 6540 sda = htab->sdata[1].sym; 6541 if (sda != NULL && sda->ref_regular) 6542 sda->root.u.def.section->flags |= SEC_KEEP; 6543 } 6544 6545 if (htab->glink != NULL 6546 && htab->glink->size != 0 6547 && htab->elf.dynamic_sections_created) 6548 { 6549 htab->glink_pltresolve = htab->glink->size; 6550 /* Space for the branch table. ??? We don't need entries for 6551 non-dynamic symbols in this table. This case can arise with 6552 static ifuncs or forced local ifuncs. */ 6553 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4; 6554 /* Pad out to align the start of PLTresolve. */ 6555 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround 6556 ? 63 : 15); 6557 htab->glink->size += GLINK_PLTRESOLVE; 6558 6559 if (htab->params->emit_stub_syms) 6560 { 6561 struct elf_link_hash_entry *sh; 6562 sh = elf_link_hash_lookup (&htab->elf, "__glink", 6563 TRUE, FALSE, FALSE); 6564 if (sh == NULL) 6565 return FALSE; 6566 if (sh->root.type == bfd_link_hash_new) 6567 { 6568 sh->root.type = bfd_link_hash_defined; 6569 sh->root.u.def.section = htab->glink; 6570 sh->root.u.def.value = htab->glink_pltresolve; 6571 sh->ref_regular = 1; 6572 sh->def_regular = 1; 6573 sh->ref_regular_nonweak = 1; 6574 sh->forced_local = 1; 6575 sh->non_elf = 0; 6576 sh->root.linker_def = 1; 6577 } 6578 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve", 6579 TRUE, FALSE, FALSE); 6580 if (sh == NULL) 6581 return FALSE; 6582 if (sh->root.type == bfd_link_hash_new) 6583 { 6584 sh->root.type = bfd_link_hash_defined; 6585 sh->root.u.def.section = htab->glink; 6586 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE; 6587 sh->ref_regular = 1; 6588 sh->def_regular = 1; 6589 sh->ref_regular_nonweak = 1; 6590 sh->forced_local = 1; 6591 sh->non_elf = 0; 6592 sh->root.linker_def = 1; 6593 } 6594 } 6595 } 6596 6597 if (htab->glink != NULL 6598 && htab->glink->size != 0 6599 && htab->glink_eh_frame != NULL 6600 && !bfd_is_abs_section (htab->glink_eh_frame->output_section) 6601 && _bfd_elf_eh_frame_present (info)) 6602 { 6603 s = htab->glink_eh_frame; 6604 s->size = sizeof (glink_eh_frame_cie) + 20; 6605 if (bfd_link_pic (info)) 6606 { 6607 s->size += 4; 6608 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256) 6609 s->size += 4; 6610 } 6611 } 6612 6613 /* We've now determined the sizes of the various dynamic sections. 6614 Allocate memory for them. */ 6615 relocs = FALSE; 6616 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next) 6617 { 6618 bfd_boolean strip_section = TRUE; 6619 6620 if ((s->flags & SEC_LINKER_CREATED) == 0) 6621 continue; 6622 6623 if (s == htab->elf.splt 6624 || s == htab->elf.sgot) 6625 { 6626 /* We'd like to strip these sections if they aren't needed, but if 6627 we've exported dynamic symbols from them we must leave them. 6628 It's too late to tell BFD to get rid of the symbols. */ 6629 if (htab->elf.hplt != NULL) 6630 strip_section = FALSE; 6631 /* Strip this section if we don't need it; see the 6632 comment below. */ 6633 } 6634 else if (s == htab->elf.iplt 6635 || s == htab->glink 6636 || s == htab->glink_eh_frame 6637 || s == htab->elf.sgotplt 6638 || s == htab->sbss 6639 || s == htab->elf.sdynbss 6640 || s == htab->elf.sdynrelro 6641 || s == htab->dynsbss) 6642 { 6643 /* Strip these too. */ 6644 } 6645 else if (s == htab->sdata[0].section 6646 || s == htab->sdata[1].section) 6647 { 6648 strip_section = (s->flags & SEC_KEEP) == 0; 6649 } 6650 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s), 6651 ".rela")) 6652 { 6653 if (s->size != 0) 6654 { 6655 /* Remember whether there are any relocation sections. */ 6656 relocs = TRUE; 6657 6658 /* We use the reloc_count field as a counter if we need 6659 to copy relocs into the output file. */ 6660 s->reloc_count = 0; 6661 } 6662 } 6663 else 6664 { 6665 /* It's not one of our sections, so don't allocate space. */ 6666 continue; 6667 } 6668 6669 if (s->size == 0 && strip_section) 6670 { 6671 /* If we don't need this section, strip it from the 6672 output file. This is mostly to handle .rela.bss and 6673 .rela.plt. We must create both sections in 6674 create_dynamic_sections, because they must be created 6675 before the linker maps input sections to output 6676 sections. The linker does that before 6677 adjust_dynamic_symbol is called, and it is that 6678 function which decides whether anything needs to go 6679 into these sections. */ 6680 s->flags |= SEC_EXCLUDE; 6681 continue; 6682 } 6683 6684 if ((s->flags & SEC_HAS_CONTENTS) == 0) 6685 continue; 6686 6687 /* Allocate memory for the section contents. */ 6688 s->contents = bfd_zalloc (htab->elf.dynobj, s->size); 6689 if (s->contents == NULL) 6690 return FALSE; 6691 } 6692 6693 if (htab->elf.dynamic_sections_created) 6694 { 6695 /* Add some entries to the .dynamic section. We fill in the 6696 values later, in ppc_elf_finish_dynamic_sections, but we 6697 must add the entries now so that we get the correct size for 6698 the .dynamic section. The DT_DEBUG entry is filled in by the 6699 dynamic linker and used by the debugger. */ 6700 #define add_dynamic_entry(TAG, VAL) \ 6701 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 6702 6703 if (bfd_link_executable (info)) 6704 { 6705 if (!add_dynamic_entry (DT_DEBUG, 0)) 6706 return FALSE; 6707 } 6708 6709 if (htab->elf.splt != NULL && htab->elf.splt->size != 0) 6710 { 6711 if (!add_dynamic_entry (DT_PLTGOT, 0) 6712 || !add_dynamic_entry (DT_PLTRELSZ, 0) 6713 || !add_dynamic_entry (DT_PLTREL, DT_RELA) 6714 || !add_dynamic_entry (DT_JMPREL, 0)) 6715 return FALSE; 6716 } 6717 6718 if (htab->plt_type == PLT_NEW 6719 && htab->glink != NULL 6720 && htab->glink->size != 0) 6721 { 6722 if (!add_dynamic_entry (DT_PPC_GOT, 0)) 6723 return FALSE; 6724 if (!htab->params->no_tls_get_addr_opt 6725 && htab->tls_get_addr != NULL 6726 && htab->tls_get_addr->plt.plist != NULL 6727 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS)) 6728 return FALSE; 6729 } 6730 6731 if (relocs) 6732 { 6733 if (!add_dynamic_entry (DT_RELA, 0) 6734 || !add_dynamic_entry (DT_RELASZ, 0) 6735 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) 6736 return FALSE; 6737 } 6738 6739 /* If any dynamic relocs apply to a read-only section, then we 6740 need a DT_TEXTREL entry. */ 6741 if ((info->flags & DF_TEXTREL) == 0) 6742 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel, 6743 info); 6744 6745 if ((info->flags & DF_TEXTREL) != 0) 6746 { 6747 if (!add_dynamic_entry (DT_TEXTREL, 0)) 6748 return FALSE; 6749 } 6750 if (htab->is_vxworks 6751 && !elf_vxworks_add_dynamic_entries (output_bfd, info)) 6752 return FALSE; 6753 } 6754 #undef add_dynamic_entry 6755 6756 if (htab->glink_eh_frame != NULL 6757 && htab->glink_eh_frame->contents != NULL) 6758 { 6759 unsigned char *p = htab->glink_eh_frame->contents; 6760 bfd_vma val; 6761 6762 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie)); 6763 /* CIE length (rewrite in case little-endian). */ 6764 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p); 6765 p += sizeof (glink_eh_frame_cie); 6766 /* FDE length. */ 6767 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie); 6768 bfd_put_32 (htab->elf.dynobj, val, p); 6769 p += 4; 6770 /* CIE pointer. */ 6771 val = p - htab->glink_eh_frame->contents; 6772 bfd_put_32 (htab->elf.dynobj, val, p); 6773 p += 4; 6774 /* Offset to .glink. Set later. */ 6775 p += 4; 6776 /* .glink size. */ 6777 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p); 6778 p += 4; 6779 /* Augmentation. */ 6780 p += 1; 6781 6782 if (bfd_link_pic (info) 6783 && htab->elf.dynamic_sections_created) 6784 { 6785 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2; 6786 if (adv < 64) 6787 *p++ = DW_CFA_advance_loc + adv; 6788 else if (adv < 256) 6789 { 6790 *p++ = DW_CFA_advance_loc1; 6791 *p++ = adv; 6792 } 6793 else if (adv < 65536) 6794 { 6795 *p++ = DW_CFA_advance_loc2; 6796 bfd_put_16 (htab->elf.dynobj, adv, p); 6797 p += 2; 6798 } 6799 else 6800 { 6801 *p++ = DW_CFA_advance_loc4; 6802 bfd_put_32 (htab->elf.dynobj, adv, p); 6803 p += 4; 6804 } 6805 *p++ = DW_CFA_register; 6806 *p++ = 65; 6807 p++; 6808 *p++ = DW_CFA_advance_loc + 4; 6809 *p++ = DW_CFA_restore_extended; 6810 *p++ = 65; 6811 } 6812 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4) 6813 == htab->glink_eh_frame->size); 6814 } 6815 6816 return TRUE; 6817 } 6818 6819 /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output 6820 if it looks like nothing is using them. */ 6821 6822 static void 6823 maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect) 6824 { 6825 struct elf_link_hash_entry *sda = lsect->sym; 6826 6827 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1) 6828 { 6829 asection *s; 6830 6831 s = bfd_get_section_by_name (output_bfd, lsect->name); 6832 if (s == NULL || bfd_section_removed_from_list (output_bfd, s)) 6833 { 6834 s = bfd_get_section_by_name (output_bfd, lsect->bss_name); 6835 if (s == NULL || bfd_section_removed_from_list (output_bfd, s)) 6836 { 6837 sda->def_regular = 0; 6838 /* This is somewhat magic. See elf_link_output_extsym. */ 6839 sda->ref_dynamic = 1; 6840 sda->forced_local = 0; 6841 } 6842 } 6843 } 6844 } 6845 6846 void 6847 ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info) 6848 { 6849 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 6850 6851 if (htab != NULL) 6852 { 6853 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]); 6854 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]); 6855 } 6856 } 6857 6858 6859 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ 6860 6861 static bfd_boolean 6862 ppc_elf_hash_symbol (struct elf_link_hash_entry *h) 6863 { 6864 if (h->plt.plist != NULL 6865 && !h->def_regular 6866 && (!h->pointer_equality_needed 6867 || !h->ref_regular_nonweak)) 6868 return FALSE; 6869 6870 return _bfd_elf_hash_symbol (h); 6871 } 6872 6873 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0])) 6874 6875 /* Relaxation trampolines. r12 is available for clobbering (r11, is 6876 used for some functions that are allowed to break the ABI). */ 6877 static const int shared_stub_entry[] = 6878 { 6879 0x7c0802a6, /* mflr 0 */ 6880 0x429f0005, /* bcl 20, 31, .Lxxx */ 6881 0x7d8802a6, /* mflr 12 */ 6882 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */ 6883 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */ 6884 0x7c0803a6, /* mtlr 0 */ 6885 0x7d8903a6, /* mtctr 12 */ 6886 0x4e800420, /* bctr */ 6887 }; 6888 6889 static const int stub_entry[] = 6890 { 6891 0x3d800000, /* lis 12,xxx@ha */ 6892 0x398c0000, /* addi 12,12,xxx@l */ 6893 0x7d8903a6, /* mtctr 12 */ 6894 0x4e800420, /* bctr */ 6895 }; 6896 6897 struct ppc_elf_relax_info 6898 { 6899 unsigned int workaround_size; 6900 unsigned int picfixup_size; 6901 }; 6902 6903 /* This function implements long branch trampolines, and the ppc476 6904 icache bug workaround. Any section needing trampolines or patch 6905 space for the workaround has its size extended so that we can 6906 add trampolines at the end of the section. */ 6907 6908 static bfd_boolean 6909 ppc_elf_relax_section (bfd *abfd, 6910 asection *isec, 6911 struct bfd_link_info *link_info, 6912 bfd_boolean *again) 6913 { 6914 struct one_branch_fixup 6915 { 6916 struct one_branch_fixup *next; 6917 asection *tsec; 6918 /* Final link, can use the symbol offset. For a 6919 relocatable link we use the symbol's index. */ 6920 bfd_vma toff; 6921 bfd_vma trampoff; 6922 }; 6923 6924 Elf_Internal_Shdr *symtab_hdr; 6925 bfd_byte *contents = NULL; 6926 Elf_Internal_Sym *isymbuf = NULL; 6927 Elf_Internal_Rela *internal_relocs = NULL; 6928 Elf_Internal_Rela *irel, *irelend = NULL; 6929 struct one_branch_fixup *branch_fixups = NULL; 6930 struct ppc_elf_relax_info *relax_info = NULL; 6931 unsigned changes = 0; 6932 bfd_boolean workaround_change; 6933 struct ppc_elf_link_hash_table *htab; 6934 bfd_size_type trampbase, trampoff, newsize, picfixup_size; 6935 asection *got2; 6936 bfd_boolean maybe_pasted; 6937 6938 *again = FALSE; 6939 6940 /* No need to do anything with non-alloc or non-code sections. */ 6941 if ((isec->flags & SEC_ALLOC) == 0 6942 || (isec->flags & SEC_CODE) == 0 6943 || (isec->flags & SEC_LINKER_CREATED) != 0 6944 || isec->size < 4) 6945 return TRUE; 6946 6947 /* We cannot represent the required PIC relocs in the output, so don't 6948 do anything. The linker doesn't support mixing -shared and -r 6949 anyway. */ 6950 if (bfd_link_relocatable (link_info) && bfd_link_pic (link_info)) 6951 return TRUE; 6952 6953 htab = ppc_elf_hash_table (link_info); 6954 if (htab == NULL) 6955 return TRUE; 6956 6957 isec->size = (isec->size + 3) & -4; 6958 if (isec->rawsize == 0) 6959 isec->rawsize = isec->size; 6960 trampbase = isec->size; 6961 6962 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE 6963 || isec->sec_info_type == SEC_INFO_TYPE_TARGET); 6964 isec->sec_info_type = SEC_INFO_TYPE_TARGET; 6965 6966 if (htab->params->ppc476_workaround 6967 || htab->params->pic_fixup > 0) 6968 { 6969 if (elf_section_data (isec)->sec_info == NULL) 6970 { 6971 elf_section_data (isec)->sec_info 6972 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info)); 6973 if (elf_section_data (isec)->sec_info == NULL) 6974 return FALSE; 6975 } 6976 relax_info = elf_section_data (isec)->sec_info; 6977 trampbase -= relax_info->workaround_size; 6978 } 6979 6980 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0 6981 || strcmp (isec->output_section->name, ".fini") == 0); 6982 /* Space for a branch around any trampolines. */ 6983 trampoff = trampbase; 6984 if (maybe_pasted && trampbase == isec->rawsize) 6985 trampoff += 4; 6986 6987 symtab_hdr = &elf_symtab_hdr (abfd); 6988 picfixup_size = 0; 6989 if (htab->params->branch_trampolines 6990 || htab->params->pic_fixup > 0) 6991 { 6992 /* Get a copy of the native relocations. */ 6993 if (isec->reloc_count != 0) 6994 { 6995 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL, 6996 link_info->keep_memory); 6997 if (internal_relocs == NULL) 6998 goto error_return; 6999 } 7000 7001 got2 = bfd_get_section_by_name (abfd, ".got2"); 7002 7003 irelend = internal_relocs + isec->reloc_count; 7004 for (irel = internal_relocs; irel < irelend; irel++) 7005 { 7006 unsigned long r_type = ELF32_R_TYPE (irel->r_info); 7007 bfd_vma toff, roff; 7008 asection *tsec; 7009 struct one_branch_fixup *f; 7010 size_t insn_offset = 0; 7011 bfd_vma max_branch_offset = 0, val; 7012 bfd_byte *hit_addr; 7013 unsigned long t0; 7014 struct elf_link_hash_entry *h; 7015 struct plt_entry **plist; 7016 unsigned char sym_type; 7017 7018 switch (r_type) 7019 { 7020 case R_PPC_REL24: 7021 case R_PPC_LOCAL24PC: 7022 case R_PPC_PLTREL24: 7023 max_branch_offset = 1 << 25; 7024 break; 7025 7026 case R_PPC_REL14: 7027 case R_PPC_REL14_BRTAKEN: 7028 case R_PPC_REL14_BRNTAKEN: 7029 max_branch_offset = 1 << 15; 7030 break; 7031 7032 case R_PPC_ADDR16_HA: 7033 if (htab->params->pic_fixup > 0) 7034 break; 7035 continue; 7036 7037 default: 7038 continue; 7039 } 7040 7041 /* Get the value of the symbol referred to by the reloc. */ 7042 h = NULL; 7043 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) 7044 { 7045 /* A local symbol. */ 7046 Elf_Internal_Sym *isym; 7047 7048 /* Read this BFD's local symbols. */ 7049 if (isymbuf == NULL) 7050 { 7051 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; 7052 if (isymbuf == NULL) 7053 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, 7054 symtab_hdr->sh_info, 0, 7055 NULL, NULL, NULL); 7056 if (isymbuf == 0) 7057 goto error_return; 7058 } 7059 isym = isymbuf + ELF32_R_SYM (irel->r_info); 7060 if (isym->st_shndx == SHN_UNDEF) 7061 tsec = bfd_und_section_ptr; 7062 else if (isym->st_shndx == SHN_ABS) 7063 tsec = bfd_abs_section_ptr; 7064 else if (isym->st_shndx == SHN_COMMON) 7065 tsec = bfd_com_section_ptr; 7066 else 7067 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); 7068 7069 toff = isym->st_value; 7070 sym_type = ELF_ST_TYPE (isym->st_info); 7071 } 7072 else 7073 { 7074 /* Global symbol handling. */ 7075 unsigned long indx; 7076 7077 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; 7078 h = elf_sym_hashes (abfd)[indx]; 7079 7080 while (h->root.type == bfd_link_hash_indirect 7081 || h->root.type == bfd_link_hash_warning) 7082 h = (struct elf_link_hash_entry *) h->root.u.i.link; 7083 7084 if (h->root.type == bfd_link_hash_defined 7085 || h->root.type == bfd_link_hash_defweak) 7086 { 7087 tsec = h->root.u.def.section; 7088 toff = h->root.u.def.value; 7089 } 7090 else if (h->root.type == bfd_link_hash_undefined 7091 || h->root.type == bfd_link_hash_undefweak) 7092 { 7093 tsec = bfd_und_section_ptr; 7094 toff = bfd_link_relocatable (link_info) ? indx : 0; 7095 } 7096 else 7097 continue; 7098 7099 /* If this branch is to __tls_get_addr then we may later 7100 optimise away the call. We won't be needing a long- 7101 branch stub in that case. */ 7102 if (bfd_link_executable (link_info) 7103 && h == htab->tls_get_addr 7104 && irel != internal_relocs) 7105 { 7106 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info); 7107 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info); 7108 unsigned int tls_mask = 0; 7109 7110 /* The previous reloc should be one of R_PPC_TLSGD or 7111 R_PPC_TLSLD, or for older object files, a reloc 7112 on the __tls_get_addr arg setup insn. Get tls 7113 mask bits from the symbol on that reloc. */ 7114 if (t_symndx < symtab_hdr->sh_info) 7115 { 7116 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd); 7117 7118 if (local_got_offsets != NULL) 7119 { 7120 struct plt_entry **local_plt = (struct plt_entry **) 7121 (local_got_offsets + symtab_hdr->sh_info); 7122 char *lgot_masks = (char *) 7123 (local_plt + symtab_hdr->sh_info); 7124 tls_mask = lgot_masks[t_symndx]; 7125 } 7126 } 7127 else 7128 { 7129 struct elf_link_hash_entry *th 7130 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info]; 7131 7132 while (th->root.type == bfd_link_hash_indirect 7133 || th->root.type == bfd_link_hash_warning) 7134 th = (struct elf_link_hash_entry *) th->root.u.i.link; 7135 7136 tls_mask 7137 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask; 7138 } 7139 7140 /* The mask bits tell us if the call will be 7141 optimised away. */ 7142 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0 7143 && (t_rtype == R_PPC_TLSGD 7144 || t_rtype == R_PPC_GOT_TLSGD16 7145 || t_rtype == R_PPC_GOT_TLSGD16_LO)) 7146 continue; 7147 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0 7148 && (t_rtype == R_PPC_TLSLD 7149 || t_rtype == R_PPC_GOT_TLSLD16 7150 || t_rtype == R_PPC_GOT_TLSLD16_LO)) 7151 continue; 7152 } 7153 7154 sym_type = h->type; 7155 } 7156 7157 if (r_type == R_PPC_ADDR16_HA) 7158 { 7159 if (h != NULL 7160 && !h->def_regular 7161 && h->protected_def 7162 && ppc_elf_hash_entry (h)->has_addr16_ha 7163 && ppc_elf_hash_entry (h)->has_addr16_lo) 7164 picfixup_size += 12; 7165 continue; 7166 } 7167 7168 /* The condition here under which we call find_plt_ent must 7169 match that in relocate_section. If we call find_plt_ent here 7170 but not in relocate_section, or vice versa, then the branch 7171 destination used here may be incorrect. */ 7172 plist = NULL; 7173 if (h != NULL) 7174 { 7175 /* We know is_branch_reloc (r_type) is true. */ 7176 if (h->type == STT_GNU_IFUNC 7177 || r_type == R_PPC_PLTREL24) 7178 plist = &h->plt.plist; 7179 } 7180 else if (sym_type == STT_GNU_IFUNC 7181 && elf_local_got_offsets (abfd) != NULL) 7182 { 7183 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd); 7184 struct plt_entry **local_plt = (struct plt_entry **) 7185 (local_got_offsets + symtab_hdr->sh_info); 7186 plist = local_plt + ELF32_R_SYM (irel->r_info); 7187 } 7188 if (plist != NULL) 7189 { 7190 bfd_vma addend = 0; 7191 struct plt_entry *ent; 7192 7193 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (link_info)) 7194 addend = irel->r_addend; 7195 ent = find_plt_ent (plist, got2, addend); 7196 if (ent != NULL) 7197 { 7198 if (htab->plt_type == PLT_NEW 7199 || h == NULL 7200 || !htab->elf.dynamic_sections_created 7201 || h->dynindx == -1) 7202 { 7203 tsec = htab->glink; 7204 toff = ent->glink_offset; 7205 } 7206 else 7207 { 7208 tsec = htab->elf.splt; 7209 toff = ent->plt.offset; 7210 } 7211 } 7212 } 7213 7214 /* If the branch and target are in the same section, you have 7215 no hope of adding stubs. We'll error out later should the 7216 branch overflow. */ 7217 if (tsec == isec) 7218 continue; 7219 7220 /* There probably isn't any reason to handle symbols in 7221 SEC_MERGE sections; SEC_MERGE doesn't seem a likely 7222 attribute for a code section, and we are only looking at 7223 branches. However, implement it correctly here as a 7224 reference for other target relax_section functions. */ 7225 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE) 7226 { 7227 /* At this stage in linking, no SEC_MERGE symbol has been 7228 adjusted, so all references to such symbols need to be 7229 passed through _bfd_merged_section_offset. (Later, in 7230 relocate_section, all SEC_MERGE symbols *except* for 7231 section symbols have been adjusted.) 7232 7233 gas may reduce relocations against symbols in SEC_MERGE 7234 sections to a relocation against the section symbol when 7235 the original addend was zero. When the reloc is against 7236 a section symbol we should include the addend in the 7237 offset passed to _bfd_merged_section_offset, since the 7238 location of interest is the original symbol. On the 7239 other hand, an access to "sym+addend" where "sym" is not 7240 a section symbol should not include the addend; Such an 7241 access is presumed to be an offset from "sym"; The 7242 location of interest is just "sym". */ 7243 if (sym_type == STT_SECTION) 7244 toff += irel->r_addend; 7245 7246 toff 7247 = _bfd_merged_section_offset (abfd, &tsec, 7248 elf_section_data (tsec)->sec_info, 7249 toff); 7250 7251 if (sym_type != STT_SECTION) 7252 toff += irel->r_addend; 7253 } 7254 /* PLTREL24 addends are special. */ 7255 else if (r_type != R_PPC_PLTREL24) 7256 toff += irel->r_addend; 7257 7258 /* Attempted -shared link of non-pic code loses. */ 7259 if ((!bfd_link_relocatable (link_info) 7260 && tsec == bfd_und_section_ptr) 7261 || tsec->output_section == NULL 7262 || (tsec->owner != NULL 7263 && (tsec->owner->flags & BFD_PLUGIN) != 0)) 7264 continue; 7265 7266 roff = irel->r_offset; 7267 7268 /* If the branch is in range, no need to do anything. */ 7269 if (tsec != bfd_und_section_ptr 7270 && (!bfd_link_relocatable (link_info) 7271 /* A relocatable link may have sections moved during 7272 final link, so do not presume they remain in range. */ 7273 || tsec->output_section == isec->output_section)) 7274 { 7275 bfd_vma symaddr, reladdr; 7276 7277 symaddr = tsec->output_section->vma + tsec->output_offset + toff; 7278 reladdr = isec->output_section->vma + isec->output_offset + roff; 7279 if (symaddr - reladdr + max_branch_offset 7280 < 2 * max_branch_offset) 7281 continue; 7282 } 7283 7284 /* Look for an existing fixup to this address. */ 7285 for (f = branch_fixups; f ; f = f->next) 7286 if (f->tsec == tsec && f->toff == toff) 7287 break; 7288 7289 if (f == NULL) 7290 { 7291 size_t size; 7292 unsigned long stub_rtype; 7293 7294 val = trampoff - roff; 7295 if (val >= max_branch_offset) 7296 /* Oh dear, we can't reach a trampoline. Don't try to add 7297 one. We'll report an error later. */ 7298 continue; 7299 7300 if (bfd_link_pic (link_info)) 7301 { 7302 size = 4 * ARRAY_SIZE (shared_stub_entry); 7303 insn_offset = 12; 7304 } 7305 else 7306 { 7307 size = 4 * ARRAY_SIZE (stub_entry); 7308 insn_offset = 0; 7309 } 7310 stub_rtype = R_PPC_RELAX; 7311 if (tsec == htab->elf.splt 7312 || tsec == htab->glink) 7313 { 7314 stub_rtype = R_PPC_RELAX_PLT; 7315 if (r_type == R_PPC_PLTREL24) 7316 stub_rtype = R_PPC_RELAX_PLTREL24; 7317 } 7318 7319 /* Hijack the old relocation. Since we need two 7320 relocations for this use a "composite" reloc. */ 7321 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 7322 stub_rtype); 7323 irel->r_offset = trampoff + insn_offset; 7324 if (r_type == R_PPC_PLTREL24 7325 && stub_rtype != R_PPC_RELAX_PLTREL24) 7326 irel->r_addend = 0; 7327 7328 /* Record the fixup so we don't do it again this section. */ 7329 f = bfd_malloc (sizeof (*f)); 7330 f->next = branch_fixups; 7331 f->tsec = tsec; 7332 f->toff = toff; 7333 f->trampoff = trampoff; 7334 branch_fixups = f; 7335 7336 trampoff += size; 7337 changes++; 7338 } 7339 else 7340 { 7341 val = f->trampoff - roff; 7342 if (val >= max_branch_offset) 7343 continue; 7344 7345 /* Nop out the reloc, since we're finalizing things here. */ 7346 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE); 7347 } 7348 7349 /* Get the section contents. */ 7350 if (contents == NULL) 7351 { 7352 /* Get cached copy if it exists. */ 7353 if (elf_section_data (isec)->this_hdr.contents != NULL) 7354 contents = elf_section_data (isec)->this_hdr.contents; 7355 /* Go get them off disk. */ 7356 else if (!bfd_malloc_and_get_section (abfd, isec, &contents)) 7357 goto error_return; 7358 } 7359 7360 /* Fix up the existing branch to hit the trampoline. */ 7361 hit_addr = contents + roff; 7362 switch (r_type) 7363 { 7364 case R_PPC_REL24: 7365 case R_PPC_LOCAL24PC: 7366 case R_PPC_PLTREL24: 7367 t0 = bfd_get_32 (abfd, hit_addr); 7368 t0 &= ~0x3fffffc; 7369 t0 |= val & 0x3fffffc; 7370 bfd_put_32 (abfd, t0, hit_addr); 7371 break; 7372 7373 case R_PPC_REL14: 7374 case R_PPC_REL14_BRTAKEN: 7375 case R_PPC_REL14_BRNTAKEN: 7376 t0 = bfd_get_32 (abfd, hit_addr); 7377 t0 &= ~0xfffc; 7378 t0 |= val & 0xfffc; 7379 bfd_put_32 (abfd, t0, hit_addr); 7380 break; 7381 } 7382 } 7383 7384 while (branch_fixups != NULL) 7385 { 7386 struct one_branch_fixup *f = branch_fixups; 7387 branch_fixups = branch_fixups->next; 7388 free (f); 7389 } 7390 } 7391 7392 workaround_change = FALSE; 7393 newsize = trampoff; 7394 if (htab->params->ppc476_workaround 7395 && (!bfd_link_relocatable (link_info) 7396 || isec->output_section->alignment_power >= htab->params->pagesize_p2)) 7397 { 7398 bfd_vma addr, end_addr; 7399 unsigned int crossings; 7400 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2; 7401 7402 addr = isec->output_section->vma + isec->output_offset; 7403 end_addr = addr + trampoff; 7404 addr &= -pagesize; 7405 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2; 7406 if (crossings != 0) 7407 { 7408 /* Keep space aligned, to ensure the patch code itself does 7409 not cross a page. Don't decrease size calculated on a 7410 previous pass as otherwise we might never settle on a layout. */ 7411 newsize = 15 - ((end_addr - 1) & 15); 7412 newsize += crossings * 16; 7413 if (relax_info->workaround_size < newsize) 7414 { 7415 relax_info->workaround_size = newsize; 7416 workaround_change = TRUE; 7417 } 7418 /* Ensure relocate_section is called. */ 7419 isec->flags |= SEC_RELOC; 7420 } 7421 newsize = trampoff + relax_info->workaround_size; 7422 } 7423 7424 if (htab->params->pic_fixup > 0) 7425 { 7426 picfixup_size -= relax_info->picfixup_size; 7427 if (picfixup_size != 0) 7428 relax_info->picfixup_size += picfixup_size; 7429 newsize += relax_info->picfixup_size; 7430 } 7431 7432 if (changes != 0 || picfixup_size != 0 || workaround_change) 7433 isec->size = newsize; 7434 7435 if (isymbuf != NULL 7436 && symtab_hdr->contents != (unsigned char *) isymbuf) 7437 { 7438 if (! link_info->keep_memory) 7439 free (isymbuf); 7440 else 7441 { 7442 /* Cache the symbols for elf_link_input_bfd. */ 7443 symtab_hdr->contents = (unsigned char *) isymbuf; 7444 } 7445 } 7446 7447 if (contents != NULL 7448 && elf_section_data (isec)->this_hdr.contents != contents) 7449 { 7450 if (!changes && !link_info->keep_memory) 7451 free (contents); 7452 else 7453 { 7454 /* Cache the section contents for elf_link_input_bfd. */ 7455 elf_section_data (isec)->this_hdr.contents = contents; 7456 } 7457 } 7458 7459 changes += picfixup_size; 7460 if (changes != 0) 7461 { 7462 /* Append sufficient NOP relocs so we can write out relocation 7463 information for the trampolines. */ 7464 Elf_Internal_Shdr *rel_hdr; 7465 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count) 7466 * sizeof (*new_relocs)); 7467 unsigned ix; 7468 7469 if (!new_relocs) 7470 goto error_return; 7471 memcpy (new_relocs, internal_relocs, 7472 isec->reloc_count * sizeof (*new_relocs)); 7473 for (ix = changes; ix--;) 7474 { 7475 irel = new_relocs + ix + isec->reloc_count; 7476 7477 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE); 7478 } 7479 if (internal_relocs != elf_section_data (isec)->relocs) 7480 free (internal_relocs); 7481 elf_section_data (isec)->relocs = new_relocs; 7482 isec->reloc_count += changes; 7483 rel_hdr = _bfd_elf_single_rel_hdr (isec); 7484 rel_hdr->sh_size += changes * rel_hdr->sh_entsize; 7485 } 7486 else if (internal_relocs != NULL 7487 && elf_section_data (isec)->relocs != internal_relocs) 7488 free (internal_relocs); 7489 7490 *again = changes != 0 || workaround_change; 7491 return TRUE; 7492 7493 error_return: 7494 while (branch_fixups != NULL) 7495 { 7496 struct one_branch_fixup *f = branch_fixups; 7497 branch_fixups = branch_fixups->next; 7498 free (f); 7499 } 7500 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents) 7501 free (isymbuf); 7502 if (contents != NULL 7503 && elf_section_data (isec)->this_hdr.contents != contents) 7504 free (contents); 7505 if (internal_relocs != NULL 7506 && elf_section_data (isec)->relocs != internal_relocs) 7507 free (internal_relocs); 7508 return FALSE; 7509 } 7510 7511 /* What to do when ld finds relocations against symbols defined in 7512 discarded sections. */ 7513 7514 static unsigned int 7515 ppc_elf_action_discarded (asection *sec) 7516 { 7517 if (strcmp (".fixup", sec->name) == 0) 7518 return 0; 7519 7520 if (strcmp (".got2", sec->name) == 0) 7521 return 0; 7522 7523 return _bfd_elf_default_action_discarded (sec); 7524 } 7525 7526 /* Fill in the address for a pointer generated in a linker section. */ 7527 7528 static bfd_vma 7529 elf_finish_pointer_linker_section (bfd *input_bfd, 7530 elf_linker_section_t *lsect, 7531 struct elf_link_hash_entry *h, 7532 bfd_vma relocation, 7533 const Elf_Internal_Rela *rel) 7534 { 7535 elf_linker_section_pointers_t *linker_section_ptr; 7536 7537 BFD_ASSERT (lsect != NULL); 7538 7539 if (h != NULL) 7540 { 7541 /* Handle global symbol. */ 7542 struct ppc_elf_link_hash_entry *eh; 7543 7544 eh = (struct ppc_elf_link_hash_entry *) h; 7545 BFD_ASSERT (eh->elf.def_regular); 7546 linker_section_ptr = eh->linker_section_pointer; 7547 } 7548 else 7549 { 7550 /* Handle local symbol. */ 7551 unsigned long r_symndx = ELF32_R_SYM (rel->r_info); 7552 7553 BFD_ASSERT (is_ppc_elf (input_bfd)); 7554 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL); 7555 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx]; 7556 } 7557 7558 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr, 7559 rel->r_addend, 7560 lsect); 7561 BFD_ASSERT (linker_section_ptr != NULL); 7562 7563 /* Offset will always be a multiple of four, so use the bottom bit 7564 as a "written" flag. */ 7565 if ((linker_section_ptr->offset & 1) == 0) 7566 { 7567 bfd_put_32 (lsect->section->owner, 7568 relocation + linker_section_ptr->addend, 7569 lsect->section->contents + linker_section_ptr->offset); 7570 linker_section_ptr->offset += 1; 7571 } 7572 7573 relocation = (lsect->section->output_section->vma 7574 + lsect->section->output_offset 7575 + linker_section_ptr->offset - 1 7576 - SYM_VAL (lsect->sym)); 7577 7578 #ifdef DEBUG 7579 fprintf (stderr, 7580 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n", 7581 lsect->name, (long) relocation, (long) relocation); 7582 #endif 7583 7584 return relocation; 7585 } 7586 7587 #define PPC_LO(v) ((v) & 0xffff) 7588 #define PPC_HI(v) (((v) >> 16) & 0xffff) 7589 #define PPC_HA(v) PPC_HI ((v) + 0x8000) 7590 7591 static void 7592 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p, 7593 struct bfd_link_info *info) 7594 { 7595 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 7596 bfd *output_bfd = info->output_bfd; 7597 bfd_vma plt; 7598 7599 plt = ((ent->plt.offset & ~1) 7600 + plt_sec->output_section->vma 7601 + plt_sec->output_offset); 7602 7603 if (bfd_link_pic (info)) 7604 { 7605 bfd_vma got = 0; 7606 7607 if (ent->addend >= 32768) 7608 got = (ent->addend 7609 + ent->sec->output_section->vma 7610 + ent->sec->output_offset); 7611 else if (htab->elf.hgot != NULL) 7612 got = SYM_VAL (htab->elf.hgot); 7613 7614 plt -= got; 7615 7616 if (plt + 0x8000 < 0x10000) 7617 { 7618 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p); 7619 p += 4; 7620 bfd_put_32 (output_bfd, MTCTR_11, p); 7621 p += 4; 7622 bfd_put_32 (output_bfd, BCTR, p); 7623 p += 4; 7624 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p); 7625 p += 4; 7626 } 7627 else 7628 { 7629 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p); 7630 p += 4; 7631 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p); 7632 p += 4; 7633 bfd_put_32 (output_bfd, MTCTR_11, p); 7634 p += 4; 7635 bfd_put_32 (output_bfd, BCTR, p); 7636 p += 4; 7637 } 7638 } 7639 else 7640 { 7641 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p); 7642 p += 4; 7643 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p); 7644 p += 4; 7645 bfd_put_32 (output_bfd, MTCTR_11, p); 7646 p += 4; 7647 bfd_put_32 (output_bfd, BCTR, p); 7648 p += 4; 7649 } 7650 } 7651 7652 /* Return true if symbol is defined statically. */ 7653 7654 static bfd_boolean 7655 is_static_defined (struct elf_link_hash_entry *h) 7656 { 7657 return ((h->root.type == bfd_link_hash_defined 7658 || h->root.type == bfd_link_hash_defweak) 7659 && h->root.u.def.section != NULL 7660 && h->root.u.def.section->output_section != NULL); 7661 } 7662 7663 /* If INSN is an opcode that may be used with an @tls operand, return 7664 the transformed insn for TLS optimisation, otherwise return 0. If 7665 REG is non-zero only match an insn with RB or RA equal to REG. */ 7666 7667 unsigned int 7668 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg) 7669 { 7670 unsigned int rtra; 7671 7672 if ((insn & (0x3f << 26)) != 31 << 26) 7673 return 0; 7674 7675 if (reg == 0 || ((insn >> 11) & 0x1f) == reg) 7676 rtra = insn & ((1 << 26) - (1 << 16)); 7677 else if (((insn >> 16) & 0x1f) == reg) 7678 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5); 7679 else 7680 return 0; 7681 7682 if ((insn & (0x3ff << 1)) == 266 << 1) 7683 /* add -> addi. */ 7684 insn = 14 << 26; 7685 else if ((insn & (0x1f << 1)) == 23 << 1 7686 && ((insn & (0x1f << 6)) < 14 << 6 7687 || ((insn & (0x1f << 6)) >= 16 << 6 7688 && (insn & (0x1f << 6)) < 24 << 6))) 7689 /* load and store indexed -> dform. */ 7690 insn = (32 | ((insn >> 6) & 0x1f)) << 26; 7691 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1) 7692 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */ 7693 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1); 7694 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1) 7695 /* lwax -> lwa. */ 7696 insn = (58 << 26) | 2; 7697 else 7698 return 0; 7699 insn |= rtra; 7700 return insn; 7701 } 7702 7703 /* If INSN is an opcode that may be used with an @tprel operand, return 7704 the transformed insn for an undefined weak symbol, ie. with the 7705 thread pointer REG operand removed. Otherwise return 0. */ 7706 7707 unsigned int 7708 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg) 7709 { 7710 if ((insn & (0x1f << 16)) == reg << 16 7711 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */ 7712 || (insn & (0x3f << 26)) == 15u << 26 /* addis */ 7713 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */ 7714 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */ 7715 || (insn & (0x3f << 26)) == 36u << 26 /* stw */ 7716 || (insn & (0x3f << 26)) == 38u << 26 /* stb */ 7717 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */ 7718 || (insn & (0x3f << 26)) == 42u << 26 /* lha */ 7719 || (insn & (0x3f << 26)) == 44u << 26 /* sth */ 7720 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */ 7721 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */ 7722 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */ 7723 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */ 7724 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */ 7725 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */ 7726 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */ 7727 && (insn & 3) != 1) 7728 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */ 7729 && ((insn & 3) == 0 || (insn & 3) == 3)))) 7730 { 7731 insn &= ~(0x1f << 16); 7732 } 7733 else if ((insn & (0x1f << 21)) == reg << 21 7734 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */ 7735 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */ 7736 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */)) 7737 { 7738 insn &= ~(0x1f << 21); 7739 insn |= (insn & (0x1f << 16)) << 5; 7740 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */) 7741 insn -= 2 >> 26; /* convert to ori,oris */ 7742 } 7743 else 7744 insn = 0; 7745 return insn; 7746 } 7747 7748 static bfd_boolean 7749 is_insn_ds_form (unsigned int insn) 7750 { 7751 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */ 7752 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */ 7753 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */ 7754 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */); 7755 } 7756 7757 static bfd_boolean 7758 is_insn_dq_form (unsigned int insn) 7759 { 7760 return ((insn & (0x3f << 26)) == 56u << 26 /* lq */ 7761 || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */ 7762 && (insn & 3) == 1)); 7763 } 7764 7765 /* The RELOCATE_SECTION function is called by the ELF backend linker 7766 to handle the relocations for a section. 7767 7768 The relocs are always passed as Rela structures; if the section 7769 actually uses Rel structures, the r_addend field will always be 7770 zero. 7771 7772 This function is responsible for adjust the section contents as 7773 necessary, and (if using Rela relocs and generating a 7774 relocatable output file) adjusting the reloc addend as 7775 necessary. 7776 7777 This function does not have to worry about setting the reloc 7778 address or the reloc symbol index. 7779 7780 LOCAL_SYMS is a pointer to the swapped in local symbols. 7781 7782 LOCAL_SECTIONS is an array giving the section in the input file 7783 corresponding to the st_shndx field of each local symbol. 7784 7785 The global hash table entry for the global symbols can be found 7786 via elf_sym_hashes (input_bfd). 7787 7788 When generating relocatable output, this function must handle 7789 STB_LOCAL/STT_SECTION symbols specially. The output symbol is 7790 going to be the section symbol corresponding to the output 7791 section, which means that the addend must be adjusted 7792 accordingly. */ 7793 7794 static bfd_boolean 7795 ppc_elf_relocate_section (bfd *output_bfd, 7796 struct bfd_link_info *info, 7797 bfd *input_bfd, 7798 asection *input_section, 7799 bfd_byte *contents, 7800 Elf_Internal_Rela *relocs, 7801 Elf_Internal_Sym *local_syms, 7802 asection **local_sections) 7803 { 7804 Elf_Internal_Shdr *symtab_hdr; 7805 struct elf_link_hash_entry **sym_hashes; 7806 struct ppc_elf_link_hash_table *htab; 7807 Elf_Internal_Rela *rel; 7808 Elf_Internal_Rela *wrel; 7809 Elf_Internal_Rela *relend; 7810 Elf_Internal_Rela outrel; 7811 asection *got2; 7812 bfd_vma *local_got_offsets; 7813 bfd_boolean ret = TRUE; 7814 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0); 7815 bfd_boolean is_vxworks_tls; 7816 unsigned int picfixup_size = 0; 7817 struct ppc_elf_relax_info *relax_info = NULL; 7818 7819 #ifdef DEBUG 7820 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, " 7821 "%ld relocations%s", 7822 input_bfd, input_section, 7823 (long) input_section->reloc_count, 7824 (bfd_link_relocatable (info)) ? " (relocatable)" : ""); 7825 #endif 7826 7827 got2 = bfd_get_section_by_name (input_bfd, ".got2"); 7828 7829 /* Initialize howto table if not already done. */ 7830 if (!ppc_elf_howto_table[R_PPC_ADDR32]) 7831 ppc_elf_howto_init (); 7832 7833 htab = ppc_elf_hash_table (info); 7834 local_got_offsets = elf_local_got_offsets (input_bfd); 7835 symtab_hdr = &elf_symtab_hdr (input_bfd); 7836 sym_hashes = elf_sym_hashes (input_bfd); 7837 /* We have to handle relocations in vxworks .tls_vars sections 7838 specially, because the dynamic loader is 'weird'. */ 7839 is_vxworks_tls = (htab->is_vxworks && bfd_link_pic (info) 7840 && !strcmp (input_section->output_section->name, 7841 ".tls_vars")); 7842 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET) 7843 relax_info = elf_section_data (input_section)->sec_info; 7844 rel = wrel = relocs; 7845 relend = relocs + input_section->reloc_count; 7846 for (; rel < relend; wrel++, rel++) 7847 { 7848 enum elf_ppc_reloc_type r_type; 7849 bfd_vma addend; 7850 bfd_reloc_status_type r; 7851 Elf_Internal_Sym *sym; 7852 asection *sec; 7853 struct elf_link_hash_entry *h; 7854 const char *sym_name; 7855 reloc_howto_type *howto; 7856 unsigned long r_symndx; 7857 bfd_vma relocation; 7858 bfd_vma branch_bit, from; 7859 bfd_boolean unresolved_reloc; 7860 bfd_boolean warned; 7861 unsigned int tls_type, tls_mask, tls_gd; 7862 struct plt_entry **ifunc; 7863 struct reloc_howto_struct alt_howto; 7864 7865 again: 7866 r_type = ELF32_R_TYPE (rel->r_info); 7867 sym = NULL; 7868 sec = NULL; 7869 h = NULL; 7870 unresolved_reloc = FALSE; 7871 warned = FALSE; 7872 r_symndx = ELF32_R_SYM (rel->r_info); 7873 7874 if (r_symndx < symtab_hdr->sh_info) 7875 { 7876 sym = local_syms + r_symndx; 7877 sec = local_sections[r_symndx]; 7878 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec); 7879 7880 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 7881 } 7882 else 7883 { 7884 bfd_boolean ignored; 7885 7886 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 7887 r_symndx, symtab_hdr, sym_hashes, 7888 h, sec, relocation, 7889 unresolved_reloc, warned, ignored); 7890 7891 sym_name = h->root.root.string; 7892 } 7893 7894 if (sec != NULL && discarded_section (sec)) 7895 { 7896 /* For relocs against symbols from removed linkonce sections, 7897 or sections discarded by a linker script, we just want the 7898 section contents zeroed. Avoid any special processing. */ 7899 howto = NULL; 7900 if (r_type < R_PPC_max) 7901 howto = ppc_elf_howto_table[r_type]; 7902 7903 _bfd_clear_contents (howto, input_bfd, input_section, 7904 contents + rel->r_offset); 7905 wrel->r_offset = rel->r_offset; 7906 wrel->r_info = 0; 7907 wrel->r_addend = 0; 7908 7909 /* For ld -r, remove relocations in debug sections against 7910 sections defined in discarded sections. Not done for 7911 non-debug to preserve relocs in .eh_frame which the 7912 eh_frame editing code expects to be present. */ 7913 if (bfd_link_relocatable (info) 7914 && (input_section->flags & SEC_DEBUGGING)) 7915 wrel--; 7916 7917 continue; 7918 } 7919 7920 if (bfd_link_relocatable (info)) 7921 { 7922 if (got2 != NULL 7923 && r_type == R_PPC_PLTREL24 7924 && rel->r_addend != 0) 7925 { 7926 /* R_PPC_PLTREL24 is rather special. If non-zero, the 7927 addend specifies the GOT pointer offset within .got2. */ 7928 rel->r_addend += got2->output_offset; 7929 } 7930 if (r_type != R_PPC_RELAX_PLT 7931 && r_type != R_PPC_RELAX_PLTREL24 7932 && r_type != R_PPC_RELAX) 7933 goto copy_reloc; 7934 } 7935 7936 /* TLS optimizations. Replace instruction sequences and relocs 7937 based on information we collected in tls_optimize. We edit 7938 RELOCS so that --emit-relocs will output something sensible 7939 for the final instruction stream. */ 7940 tls_mask = 0; 7941 tls_gd = 0; 7942 if (h != NULL) 7943 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask; 7944 else if (local_got_offsets != NULL) 7945 { 7946 struct plt_entry **local_plt; 7947 char *lgot_masks; 7948 local_plt 7949 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info); 7950 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info); 7951 tls_mask = lgot_masks[r_symndx]; 7952 } 7953 7954 /* Ensure reloc mapping code below stays sane. */ 7955 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3) 7956 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3) 7957 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3) 7958 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3) 7959 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3) 7960 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3) 7961 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3) 7962 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3)) 7963 abort (); 7964 switch (r_type) 7965 { 7966 default: 7967 break; 7968 7969 case R_PPC_GOT_TPREL16: 7970 case R_PPC_GOT_TPREL16_LO: 7971 if ((tls_mask & TLS_TLS) != 0 7972 && (tls_mask & TLS_TPREL) == 0) 7973 { 7974 bfd_vma insn; 7975 7976 insn = bfd_get_32 (input_bfd, 7977 contents + rel->r_offset - d_offset); 7978 insn &= 31 << 21; 7979 insn |= 0x3c020000; /* addis 0,2,0 */ 7980 bfd_put_32 (input_bfd, insn, 7981 contents + rel->r_offset - d_offset); 7982 r_type = R_PPC_TPREL16_HA; 7983 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 7984 } 7985 break; 7986 7987 case R_PPC_TLS: 7988 if ((tls_mask & TLS_TLS) != 0 7989 && (tls_mask & TLS_TPREL) == 0) 7990 { 7991 bfd_vma insn; 7992 7993 insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 7994 insn = _bfd_elf_ppc_at_tls_transform (insn, 2); 7995 if (insn == 0) 7996 abort (); 7997 bfd_put_32 (input_bfd, insn, contents + rel->r_offset); 7998 r_type = R_PPC_TPREL16_LO; 7999 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 8000 8001 /* Was PPC_TLS which sits on insn boundary, now 8002 PPC_TPREL16_LO which is at low-order half-word. */ 8003 rel->r_offset += d_offset; 8004 } 8005 break; 8006 8007 case R_PPC_GOT_TLSGD16_HI: 8008 case R_PPC_GOT_TLSGD16_HA: 8009 tls_gd = TLS_TPRELGD; 8010 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0) 8011 goto tls_gdld_hi; 8012 break; 8013 8014 case R_PPC_GOT_TLSLD16_HI: 8015 case R_PPC_GOT_TLSLD16_HA: 8016 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0) 8017 { 8018 tls_gdld_hi: 8019 if ((tls_mask & tls_gd) != 0) 8020 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3) 8021 + R_PPC_GOT_TPREL16); 8022 else 8023 { 8024 rel->r_offset -= d_offset; 8025 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset); 8026 r_type = R_PPC_NONE; 8027 } 8028 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 8029 } 8030 break; 8031 8032 case R_PPC_GOT_TLSGD16: 8033 case R_PPC_GOT_TLSGD16_LO: 8034 tls_gd = TLS_TPRELGD; 8035 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0) 8036 goto tls_ldgd_opt; 8037 break; 8038 8039 case R_PPC_GOT_TLSLD16: 8040 case R_PPC_GOT_TLSLD16_LO: 8041 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0) 8042 { 8043 unsigned int insn1, insn2; 8044 bfd_vma offset; 8045 8046 tls_ldgd_opt: 8047 offset = (bfd_vma) -1; 8048 /* If not using the newer R_PPC_TLSGD/LD to mark 8049 __tls_get_addr calls, we must trust that the call 8050 stays with its arg setup insns, ie. that the next 8051 reloc is the __tls_get_addr call associated with 8052 the current reloc. Edit both insns. */ 8053 if (input_section->has_tls_get_addr_call 8054 && rel + 1 < relend 8055 && branch_reloc_hash_match (input_bfd, rel + 1, 8056 htab->tls_get_addr)) 8057 offset = rel[1].r_offset; 8058 /* We read the low GOT_TLS insn because we need to keep 8059 the destination reg. It may be something other than 8060 the usual r3, and moved to r3 before the call by 8061 intervening code. */ 8062 insn1 = bfd_get_32 (input_bfd, 8063 contents + rel->r_offset - d_offset); 8064 if ((tls_mask & tls_gd) != 0) 8065 { 8066 /* IE */ 8067 insn1 &= (0x1f << 21) | (0x1f << 16); 8068 insn1 |= 32 << 26; /* lwz */ 8069 if (offset != (bfd_vma) -1) 8070 { 8071 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE); 8072 insn2 = 0x7c631214; /* add 3,3,2 */ 8073 bfd_put_32 (input_bfd, insn2, contents + offset); 8074 } 8075 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3) 8076 + R_PPC_GOT_TPREL16); 8077 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 8078 } 8079 else 8080 { 8081 /* LE */ 8082 insn1 &= 0x1f << 21; 8083 insn1 |= 0x3c020000; /* addis r,2,0 */ 8084 if (tls_gd == 0) 8085 { 8086 /* Was an LD reloc. */ 8087 for (r_symndx = 0; 8088 r_symndx < symtab_hdr->sh_info; 8089 r_symndx++) 8090 if (local_sections[r_symndx] == sec) 8091 break; 8092 if (r_symndx >= symtab_hdr->sh_info) 8093 r_symndx = STN_UNDEF; 8094 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; 8095 if (r_symndx != STN_UNDEF) 8096 rel->r_addend -= (local_syms[r_symndx].st_value 8097 + sec->output_offset 8098 + sec->output_section->vma); 8099 } 8100 r_type = R_PPC_TPREL16_HA; 8101 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 8102 if (offset != (bfd_vma) -1) 8103 { 8104 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO); 8105 rel[1].r_offset = offset + d_offset; 8106 rel[1].r_addend = rel->r_addend; 8107 insn2 = 0x38630000; /* addi 3,3,0 */ 8108 bfd_put_32 (input_bfd, insn2, contents + offset); 8109 } 8110 } 8111 bfd_put_32 (input_bfd, insn1, 8112 contents + rel->r_offset - d_offset); 8113 if (tls_gd == 0) 8114 { 8115 /* We changed the symbol on an LD reloc. Start over 8116 in order to get h, sym, sec etc. right. */ 8117 goto again; 8118 } 8119 } 8120 break; 8121 8122 case R_PPC_TLSGD: 8123 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0) 8124 { 8125 unsigned int insn2; 8126 bfd_vma offset = rel->r_offset; 8127 8128 if ((tls_mask & TLS_TPRELGD) != 0) 8129 { 8130 /* IE */ 8131 r_type = R_PPC_NONE; 8132 insn2 = 0x7c631214; /* add 3,3,2 */ 8133 } 8134 else 8135 { 8136 /* LE */ 8137 r_type = R_PPC_TPREL16_LO; 8138 rel->r_offset += d_offset; 8139 insn2 = 0x38630000; /* addi 3,3,0 */ 8140 } 8141 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 8142 bfd_put_32 (input_bfd, insn2, contents + offset); 8143 /* Zap the reloc on the _tls_get_addr call too. */ 8144 BFD_ASSERT (offset == rel[1].r_offset); 8145 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE); 8146 } 8147 break; 8148 8149 case R_PPC_TLSLD: 8150 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0) 8151 { 8152 unsigned int insn2; 8153 8154 for (r_symndx = 0; 8155 r_symndx < symtab_hdr->sh_info; 8156 r_symndx++) 8157 if (local_sections[r_symndx] == sec) 8158 break; 8159 if (r_symndx >= symtab_hdr->sh_info) 8160 r_symndx = STN_UNDEF; 8161 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; 8162 if (r_symndx != STN_UNDEF) 8163 rel->r_addend -= (local_syms[r_symndx].st_value 8164 + sec->output_offset 8165 + sec->output_section->vma); 8166 8167 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO); 8168 rel->r_offset += d_offset; 8169 insn2 = 0x38630000; /* addi 3,3,0 */ 8170 bfd_put_32 (input_bfd, insn2, 8171 contents + rel->r_offset - d_offset); 8172 /* Zap the reloc on the _tls_get_addr call too. */ 8173 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset); 8174 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE); 8175 goto again; 8176 } 8177 break; 8178 } 8179 8180 /* Handle other relocations that tweak non-addend part of insn. */ 8181 branch_bit = 0; 8182 switch (r_type) 8183 { 8184 default: 8185 break; 8186 8187 /* Branch taken prediction relocations. */ 8188 case R_PPC_ADDR14_BRTAKEN: 8189 case R_PPC_REL14_BRTAKEN: 8190 branch_bit = BRANCH_PREDICT_BIT; 8191 /* Fall through. */ 8192 8193 /* Branch not taken prediction relocations. */ 8194 case R_PPC_ADDR14_BRNTAKEN: 8195 case R_PPC_REL14_BRNTAKEN: 8196 { 8197 bfd_vma insn; 8198 8199 insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 8200 insn &= ~BRANCH_PREDICT_BIT; 8201 insn |= branch_bit; 8202 8203 from = (rel->r_offset 8204 + input_section->output_offset 8205 + input_section->output_section->vma); 8206 8207 /* Invert 'y' bit if not the default. */ 8208 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0) 8209 insn ^= BRANCH_PREDICT_BIT; 8210 8211 bfd_put_32 (input_bfd, insn, contents + rel->r_offset); 8212 break; 8213 } 8214 } 8215 8216 if (ELIMINATE_COPY_RELOCS 8217 && h != NULL 8218 && !h->def_regular 8219 && h->protected_def 8220 && ppc_elf_hash_entry (h)->has_addr16_ha 8221 && ppc_elf_hash_entry (h)->has_addr16_lo 8222 && htab->params->pic_fixup > 0) 8223 { 8224 /* Convert lis;addi or lis;load/store accessing a protected 8225 variable defined in a shared library to PIC. */ 8226 unsigned int insn; 8227 8228 if (r_type == R_PPC_ADDR16_HA) 8229 { 8230 insn = bfd_get_32 (input_bfd, 8231 contents + rel->r_offset - d_offset); 8232 if ((insn & (0x3f << 26)) == (15u << 26) 8233 && (insn & (0x1f << 16)) == 0 /* lis */) 8234 { 8235 bfd_byte *p; 8236 bfd_vma off; 8237 bfd_vma got_addr; 8238 8239 p = (contents + input_section->size 8240 - relax_info->workaround_size 8241 - relax_info->picfixup_size 8242 + picfixup_size); 8243 off = (p - contents) - (rel->r_offset - d_offset); 8244 if (off > 0x1fffffc || (off & 3) != 0) 8245 info->callbacks->einfo 8246 (_("%H: fixup branch overflow\n"), 8247 input_bfd, input_section, rel->r_offset); 8248 8249 bfd_put_32 (input_bfd, B | off, 8250 contents + rel->r_offset - d_offset); 8251 got_addr = (htab->elf.sgot->output_section->vma 8252 + htab->elf.sgot->output_offset 8253 + (h->got.offset & ~1)); 8254 wrel->r_offset = (p - contents) + d_offset; 8255 wrel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_HA); 8256 wrel->r_addend = got_addr; 8257 insn &= ~0xffff; 8258 insn |= ((unsigned int) (got_addr + 0x8000) >> 16) & 0xffff; 8259 bfd_put_32 (input_bfd, insn, p); 8260 8261 /* Convert lis to lwz, loading address from GOT. */ 8262 insn &= ~0xffff; 8263 insn ^= (32u ^ 15u) << 26; 8264 insn |= (insn & (0x1f << 21)) >> 5; 8265 insn |= got_addr & 0xffff; 8266 bfd_put_32 (input_bfd, insn, p + 4); 8267 8268 bfd_put_32 (input_bfd, B | ((-4 - off) & 0x3ffffff), p + 8); 8269 picfixup_size += 12; 8270 8271 /* Use one of the spare relocs, so --emit-relocs 8272 output is reasonable. */ 8273 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel)); 8274 wrel++, rel++; 8275 rel->r_offset = wrel[-1].r_offset + 4; 8276 rel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_LO); 8277 rel->r_addend = wrel[-1].r_addend; 8278 8279 /* Continue on as if we had a got reloc, to output 8280 dynamic reloc. */ 8281 r_type = R_PPC_GOT16_LO; 8282 } 8283 else 8284 info->callbacks->einfo 8285 /* xgettext:c-format */ 8286 (_("%H: error: %s with unexpected instruction %x\n"), 8287 input_bfd, input_section, rel->r_offset, 8288 "R_PPC_ADDR16_HA", insn); 8289 } 8290 else if (r_type == R_PPC_ADDR16_LO) 8291 { 8292 insn = bfd_get_32 (input_bfd, 8293 contents + rel->r_offset - d_offset); 8294 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */ 8295 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */ 8296 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */ 8297 || (insn & (0x3f << 26)) == 36u << 26 /* stw */ 8298 || (insn & (0x3f << 26)) == 38u << 26 /* stb */ 8299 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */ 8300 || (insn & (0x3f << 26)) == 42u << 26 /* lha */ 8301 || (insn & (0x3f << 26)) == 44u << 26 /* sth */ 8302 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */ 8303 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */ 8304 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */ 8305 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */ 8306 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */ 8307 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */ 8308 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */ 8309 && (insn & 3) != 1) 8310 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */ 8311 && ((insn & 3) == 0 || (insn & 3) == 3))) 8312 { 8313 /* Arrange to apply the reloc addend, if any. */ 8314 relocation = 0; 8315 unresolved_reloc = FALSE; 8316 rel->r_info = ELF32_R_INFO (0, r_type); 8317 } 8318 else 8319 info->callbacks->einfo 8320 /* xgettext:c-format */ 8321 (_("%H: error: %s with unexpected instruction %x\n"), 8322 input_bfd, input_section, rel->r_offset, 8323 "R_PPC_ADDR16_LO", insn); 8324 } 8325 } 8326 8327 ifunc = NULL; 8328 if (!htab->is_vxworks) 8329 { 8330 struct plt_entry *ent; 8331 8332 if (h != NULL) 8333 { 8334 if (h->type == STT_GNU_IFUNC) 8335 ifunc = &h->plt.plist; 8336 } 8337 else if (local_got_offsets != NULL 8338 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) 8339 { 8340 struct plt_entry **local_plt; 8341 8342 local_plt = (struct plt_entry **) (local_got_offsets 8343 + symtab_hdr->sh_info); 8344 ifunc = local_plt + r_symndx; 8345 } 8346 8347 ent = NULL; 8348 if (ifunc != NULL 8349 && (!bfd_link_pic (info) 8350 || is_branch_reloc (r_type))) 8351 { 8352 addend = 0; 8353 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info)) 8354 addend = rel->r_addend; 8355 ent = find_plt_ent (ifunc, got2, addend); 8356 } 8357 if (ent != NULL) 8358 { 8359 if (bfd_link_pic (info) 8360 && ent->sec != got2 8361 && htab->plt_type != PLT_NEW 8362 && (!htab->elf.dynamic_sections_created 8363 || h == NULL 8364 || h->dynindx == -1)) 8365 { 8366 /* Uh oh, we are going to create a pic glink stub 8367 for an ifunc (here for h == NULL and later in 8368 finish_dynamic_symbol for h != NULL), and 8369 apparently are using code compiled with 8370 -mbss-plt. The difficulty is that -mbss-plt code 8371 gives no indication via a magic PLTREL24 addend 8372 whether r30 is equal to _GLOBAL_OFFSET_TABLE_ or 8373 is pointing into a .got2 section (and how far 8374 into .got2). */ 8375 info->callbacks->einfo 8376 /* xgettext:c-format */ 8377 (_("%X%H: unsupported bss-plt -fPIC ifunc %s\n"), 8378 input_bfd, input_section, rel->r_offset, sym_name); 8379 } 8380 if (h == NULL && (ent->plt.offset & 1) == 0) 8381 { 8382 Elf_Internal_Rela rela; 8383 bfd_byte *loc; 8384 8385 rela.r_offset = (htab->elf.iplt->output_section->vma 8386 + htab->elf.iplt->output_offset 8387 + ent->plt.offset); 8388 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); 8389 rela.r_addend = relocation; 8390 loc = htab->elf.irelplt->contents; 8391 loc += (htab->elf.irelplt->reloc_count++ 8392 * sizeof (Elf32_External_Rela)); 8393 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 8394 htab->local_ifunc_resolver = 1; 8395 8396 ent->plt.offset |= 1; 8397 } 8398 if (h == NULL && (ent->glink_offset & 1) == 0) 8399 { 8400 unsigned char *p = ((unsigned char *) htab->glink->contents 8401 + ent->glink_offset); 8402 write_glink_stub (ent, htab->elf.iplt, p, info); 8403 ent->glink_offset |= 1; 8404 } 8405 8406 unresolved_reloc = FALSE; 8407 if (htab->plt_type == PLT_NEW 8408 || !htab->elf.dynamic_sections_created 8409 || h == NULL 8410 || h->dynindx == -1) 8411 relocation = (htab->glink->output_section->vma 8412 + htab->glink->output_offset 8413 + (ent->glink_offset & ~1)); 8414 else 8415 relocation = (htab->elf.splt->output_section->vma 8416 + htab->elf.splt->output_offset 8417 + ent->plt.offset); 8418 } 8419 } 8420 8421 addend = rel->r_addend; 8422 tls_type = 0; 8423 howto = NULL; 8424 if (r_type < R_PPC_max) 8425 howto = ppc_elf_howto_table[r_type]; 8426 switch (r_type) 8427 { 8428 default: 8429 info->callbacks->einfo 8430 /* xgettext:c-format */ 8431 (_("%P: %B: unknown relocation type %d for symbol %s\n"), 8432 input_bfd, (int) r_type, sym_name); 8433 8434 bfd_set_error (bfd_error_bad_value); 8435 ret = FALSE; 8436 goto copy_reloc; 8437 8438 case R_PPC_NONE: 8439 case R_PPC_TLS: 8440 case R_PPC_TLSGD: 8441 case R_PPC_TLSLD: 8442 case R_PPC_EMB_MRKREF: 8443 case R_PPC_GNU_VTINHERIT: 8444 case R_PPC_GNU_VTENTRY: 8445 goto copy_reloc; 8446 8447 /* GOT16 relocations. Like an ADDR16 using the symbol's 8448 address in the GOT as relocation value instead of the 8449 symbol's value itself. Also, create a GOT entry for the 8450 symbol and put the symbol value there. */ 8451 case R_PPC_GOT_TLSGD16: 8452 case R_PPC_GOT_TLSGD16_LO: 8453 case R_PPC_GOT_TLSGD16_HI: 8454 case R_PPC_GOT_TLSGD16_HA: 8455 tls_type = TLS_TLS | TLS_GD; 8456 goto dogot; 8457 8458 case R_PPC_GOT_TLSLD16: 8459 case R_PPC_GOT_TLSLD16_LO: 8460 case R_PPC_GOT_TLSLD16_HI: 8461 case R_PPC_GOT_TLSLD16_HA: 8462 tls_type = TLS_TLS | TLS_LD; 8463 goto dogot; 8464 8465 case R_PPC_GOT_TPREL16: 8466 case R_PPC_GOT_TPREL16_LO: 8467 case R_PPC_GOT_TPREL16_HI: 8468 case R_PPC_GOT_TPREL16_HA: 8469 tls_type = TLS_TLS | TLS_TPREL; 8470 goto dogot; 8471 8472 case R_PPC_GOT_DTPREL16: 8473 case R_PPC_GOT_DTPREL16_LO: 8474 case R_PPC_GOT_DTPREL16_HI: 8475 case R_PPC_GOT_DTPREL16_HA: 8476 tls_type = TLS_TLS | TLS_DTPREL; 8477 goto dogot; 8478 8479 case R_PPC_GOT16: 8480 case R_PPC_GOT16_LO: 8481 case R_PPC_GOT16_HI: 8482 case R_PPC_GOT16_HA: 8483 tls_mask = 0; 8484 dogot: 8485 { 8486 /* Relocation is to the entry for this symbol in the global 8487 offset table. */ 8488 bfd_vma off; 8489 bfd_vma *offp; 8490 unsigned long indx; 8491 8492 if (htab->elf.sgot == NULL) 8493 abort (); 8494 8495 indx = 0; 8496 if (tls_type == (TLS_TLS | TLS_LD) 8497 && (h == NULL 8498 || !h->def_dynamic)) 8499 offp = &htab->tlsld_got.offset; 8500 else if (h != NULL) 8501 { 8502 if (!htab->elf.dynamic_sections_created 8503 || h->dynindx == -1 8504 || SYMBOL_REFERENCES_LOCAL (info, h) 8505 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 8506 && h->root.type == bfd_link_hash_undefweak)) 8507 /* This is actually a static link, or it is a 8508 -Bsymbolic link and the symbol is defined 8509 locally, or the symbol was forced to be local 8510 because of a version file. */ 8511 ; 8512 else 8513 { 8514 indx = h->dynindx; 8515 unresolved_reloc = FALSE; 8516 } 8517 offp = &h->got.offset; 8518 } 8519 else 8520 { 8521 if (local_got_offsets == NULL) 8522 abort (); 8523 offp = &local_got_offsets[r_symndx]; 8524 } 8525 8526 /* The offset must always be a multiple of 4. We use the 8527 least significant bit to record whether we have already 8528 processed this entry. */ 8529 off = *offp; 8530 if ((off & 1) != 0) 8531 off &= ~1; 8532 else 8533 { 8534 unsigned int tls_m = (tls_mask 8535 & (TLS_LD | TLS_GD | TLS_DTPREL 8536 | TLS_TPREL | TLS_TPRELGD)); 8537 8538 if (offp == &htab->tlsld_got.offset) 8539 tls_m = TLS_LD; 8540 else if (h == NULL 8541 || !h->def_dynamic) 8542 tls_m &= ~TLS_LD; 8543 8544 /* We might have multiple got entries for this sym. 8545 Initialize them all. */ 8546 do 8547 { 8548 int tls_ty = 0; 8549 8550 if ((tls_m & TLS_LD) != 0) 8551 { 8552 tls_ty = TLS_TLS | TLS_LD; 8553 tls_m &= ~TLS_LD; 8554 } 8555 else if ((tls_m & TLS_GD) != 0) 8556 { 8557 tls_ty = TLS_TLS | TLS_GD; 8558 tls_m &= ~TLS_GD; 8559 } 8560 else if ((tls_m & TLS_DTPREL) != 0) 8561 { 8562 tls_ty = TLS_TLS | TLS_DTPREL; 8563 tls_m &= ~TLS_DTPREL; 8564 } 8565 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0) 8566 { 8567 tls_ty = TLS_TLS | TLS_TPREL; 8568 tls_m = 0; 8569 } 8570 8571 /* Generate relocs for the dynamic linker. */ 8572 if (indx != 0 8573 || (bfd_link_pic (info) 8574 && (h == NULL 8575 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 8576 || h->root.type != bfd_link_hash_undefweak 8577 || offp == &htab->tlsld_got.offset))) 8578 { 8579 asection *rsec = htab->elf.srelgot; 8580 bfd_byte * loc; 8581 8582 if (ifunc != NULL) 8583 { 8584 rsec = htab->elf.irelplt; 8585 if (indx == 0) 8586 htab->local_ifunc_resolver = 1; 8587 else if (is_static_defined (h)) 8588 htab->maybe_local_ifunc_resolver = 1; 8589 } 8590 outrel.r_offset = (htab->elf.sgot->output_section->vma 8591 + htab->elf.sgot->output_offset 8592 + off); 8593 outrel.r_addend = 0; 8594 if (tls_ty & (TLS_LD | TLS_GD)) 8595 { 8596 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32); 8597 if (tls_ty == (TLS_TLS | TLS_GD)) 8598 { 8599 loc = rsec->contents; 8600 loc += (rsec->reloc_count++ 8601 * sizeof (Elf32_External_Rela)); 8602 bfd_elf32_swap_reloca_out (output_bfd, 8603 &outrel, loc); 8604 outrel.r_offset += 4; 8605 outrel.r_info 8606 = ELF32_R_INFO (indx, R_PPC_DTPREL32); 8607 } 8608 } 8609 else if (tls_ty == (TLS_TLS | TLS_DTPREL)) 8610 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32); 8611 else if (tls_ty == (TLS_TLS | TLS_TPREL)) 8612 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32); 8613 else if (indx != 0) 8614 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT); 8615 else if (ifunc != NULL) 8616 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); 8617 else 8618 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE); 8619 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD)) 8620 { 8621 outrel.r_addend += relocation; 8622 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL)) 8623 { 8624 if (htab->elf.tls_sec == NULL) 8625 outrel.r_addend = 0; 8626 else 8627 outrel.r_addend -= htab->elf.tls_sec->vma; 8628 } 8629 } 8630 loc = rsec->contents; 8631 loc += (rsec->reloc_count++ 8632 * sizeof (Elf32_External_Rela)); 8633 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 8634 } 8635 8636 /* Init the .got section contents if we're not 8637 emitting a reloc. */ 8638 else 8639 { 8640 bfd_vma value = relocation; 8641 int tlsopt = (htab->plt_type == PLT_NEW 8642 && !htab->params->no_tls_get_addr_opt 8643 && htab->tls_get_addr != NULL 8644 && htab->tls_get_addr->plt.plist != NULL); 8645 8646 if (tls_ty != 0) 8647 { 8648 if (htab->elf.tls_sec == NULL) 8649 value = 0; 8650 else 8651 { 8652 if (tls_ty & TLS_LD) 8653 value = 0; 8654 else 8655 value -= htab->elf.tls_sec->vma + DTP_OFFSET; 8656 if ((tls_ty & TLS_TPREL) 8657 || (tlsopt && !(tls_ty & TLS_DTPREL))) 8658 value += DTP_OFFSET - TP_OFFSET; 8659 } 8660 8661 if (tls_ty & (TLS_LD | TLS_GD)) 8662 { 8663 bfd_put_32 (input_bfd, value, 8664 htab->elf.sgot->contents + off + 4); 8665 value = !tlsopt; 8666 } 8667 } 8668 bfd_put_32 (input_bfd, value, 8669 htab->elf.sgot->contents + off); 8670 } 8671 8672 off += 4; 8673 if (tls_ty & (TLS_LD | TLS_GD)) 8674 off += 4; 8675 } 8676 while (tls_m != 0); 8677 8678 off = *offp; 8679 *offp = off | 1; 8680 } 8681 8682 if (off >= (bfd_vma) -2) 8683 abort (); 8684 8685 if ((tls_type & TLS_TLS) != 0) 8686 { 8687 if (tls_type != (TLS_TLS | TLS_LD)) 8688 { 8689 if ((tls_mask & TLS_LD) != 0 8690 && !(h == NULL 8691 || !h->def_dynamic)) 8692 off += 8; 8693 if (tls_type != (TLS_TLS | TLS_GD)) 8694 { 8695 if ((tls_mask & TLS_GD) != 0) 8696 off += 8; 8697 if (tls_type != (TLS_TLS | TLS_DTPREL)) 8698 { 8699 if ((tls_mask & TLS_DTPREL) != 0) 8700 off += 4; 8701 } 8702 } 8703 } 8704 } 8705 8706 /* If here for a picfixup, we're done. */ 8707 if (r_type != ELF32_R_TYPE (rel->r_info)) 8708 goto copy_reloc; 8709 8710 relocation = (htab->elf.sgot->output_section->vma 8711 + htab->elf.sgot->output_offset 8712 + off 8713 - SYM_VAL (htab->elf.hgot)); 8714 8715 /* Addends on got relocations don't make much sense. 8716 x+off@got is actually x@got+off, and since the got is 8717 generated by a hash table traversal, the value in the 8718 got at entry m+n bears little relation to the entry m. */ 8719 if (addend != 0) 8720 info->callbacks->einfo 8721 /* xgettext:c-format */ 8722 (_("%H: non-zero addend on %s reloc against `%s'\n"), 8723 input_bfd, input_section, rel->r_offset, 8724 howto->name, 8725 sym_name); 8726 } 8727 break; 8728 8729 /* Relocations that need no special processing. */ 8730 case R_PPC_LOCAL24PC: 8731 /* It makes no sense to point a local relocation 8732 at a symbol not in this object. */ 8733 if (unresolved_reloc) 8734 { 8735 (*info->callbacks->undefined_symbol) (info, 8736 h->root.root.string, 8737 input_bfd, 8738 input_section, 8739 rel->r_offset, 8740 TRUE); 8741 goto copy_reloc; 8742 } 8743 if (h != NULL && h->type == STT_GNU_IFUNC && bfd_link_pic (info)) 8744 { 8745 /* @local on an ifunc does not really make sense since 8746 the ifunc resolver can take you anywhere. More 8747 seriously, calls to ifuncs must go through a plt call 8748 stub, and for pic the plt call stubs uses r30 to 8749 access the PLT. The problem is that a call that is 8750 local won't have the +32k reloc addend trick marking 8751 -fPIC code, so the linker won't know whether r30 is 8752 _GLOBAL_OFFSET_TABLE_ or pointing into a .got2 section. */ 8753 /* xgettext:c-format */ 8754 info->callbacks->einfo (_("%X%H: @local call to ifunc %s\n"), 8755 input_bfd, input_section, rel->r_offset, 8756 h->root.root.string); 8757 } 8758 break; 8759 8760 case R_PPC_DTPREL16: 8761 case R_PPC_DTPREL16_LO: 8762 case R_PPC_DTPREL16_HI: 8763 case R_PPC_DTPREL16_HA: 8764 if (htab->elf.tls_sec != NULL) 8765 addend -= htab->elf.tls_sec->vma + DTP_OFFSET; 8766 break; 8767 8768 /* Relocations that may need to be propagated if this is a shared 8769 object. */ 8770 case R_PPC_TPREL16: 8771 case R_PPC_TPREL16_LO: 8772 case R_PPC_TPREL16_HI: 8773 case R_PPC_TPREL16_HA: 8774 if (h != NULL 8775 && h->root.type == bfd_link_hash_undefweak 8776 && h->dynindx == -1) 8777 { 8778 /* Make this relocation against an undefined weak symbol 8779 resolve to zero. This is really just a tweak, since 8780 code using weak externs ought to check that they are 8781 defined before using them. */ 8782 bfd_byte *p = contents + rel->r_offset - d_offset; 8783 unsigned int insn = bfd_get_32 (input_bfd, p); 8784 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2); 8785 if (insn != 0) 8786 bfd_put_32 (input_bfd, insn, p); 8787 break; 8788 } 8789 if (htab->elf.tls_sec != NULL) 8790 addend -= htab->elf.tls_sec->vma + TP_OFFSET; 8791 /* The TPREL16 relocs shouldn't really be used in shared 8792 libs as they will result in DT_TEXTREL being set, but 8793 support them anyway. */ 8794 goto dodyn; 8795 8796 case R_PPC_TPREL32: 8797 if (htab->elf.tls_sec != NULL) 8798 addend -= htab->elf.tls_sec->vma + TP_OFFSET; 8799 goto dodyn; 8800 8801 case R_PPC_DTPREL32: 8802 if (htab->elf.tls_sec != NULL) 8803 addend -= htab->elf.tls_sec->vma + DTP_OFFSET; 8804 goto dodyn; 8805 8806 case R_PPC_DTPMOD32: 8807 relocation = 1; 8808 addend = 0; 8809 goto dodyn; 8810 8811 case R_PPC_REL16: 8812 case R_PPC_REL16_LO: 8813 case R_PPC_REL16_HI: 8814 case R_PPC_REL16_HA: 8815 case R_PPC_REL16DX_HA: 8816 break; 8817 8818 case R_PPC_REL32: 8819 if (h == NULL || h == htab->elf.hgot) 8820 break; 8821 /* fall through */ 8822 8823 case R_PPC_ADDR32: 8824 case R_PPC_ADDR16: 8825 case R_PPC_ADDR16_LO: 8826 case R_PPC_ADDR16_HI: 8827 case R_PPC_ADDR16_HA: 8828 case R_PPC_UADDR32: 8829 case R_PPC_UADDR16: 8830 goto dodyn; 8831 8832 case R_PPC_VLE_REL8: 8833 case R_PPC_VLE_REL15: 8834 case R_PPC_VLE_REL24: 8835 case R_PPC_REL24: 8836 case R_PPC_REL14: 8837 case R_PPC_REL14_BRTAKEN: 8838 case R_PPC_REL14_BRNTAKEN: 8839 /* If these relocations are not to a named symbol, they can be 8840 handled right here, no need to bother the dynamic linker. */ 8841 if (SYMBOL_CALLS_LOCAL (info, h) 8842 || h == htab->elf.hgot) 8843 break; 8844 /* fall through */ 8845 8846 case R_PPC_ADDR24: 8847 case R_PPC_ADDR14: 8848 case R_PPC_ADDR14_BRTAKEN: 8849 case R_PPC_ADDR14_BRNTAKEN: 8850 if (h != NULL && !bfd_link_pic (info)) 8851 break; 8852 /* fall through */ 8853 8854 dodyn: 8855 if ((input_section->flags & SEC_ALLOC) == 0 8856 || is_vxworks_tls) 8857 break; 8858 8859 if ((bfd_link_pic (info) 8860 && !(h != NULL 8861 && ((h->root.type == bfd_link_hash_undefined 8862 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN 8863 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL)) 8864 || (h->root.type == bfd_link_hash_undefweak 8865 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT))) 8866 && (must_be_dyn_reloc (info, r_type) 8867 || !SYMBOL_CALLS_LOCAL (info, h))) 8868 || (ELIMINATE_COPY_RELOCS 8869 && !bfd_link_pic (info) 8870 && h != NULL 8871 && h->dynindx != -1 8872 && !h->non_got_ref 8873 && !h->def_regular 8874 && !(h->protected_def 8875 && ppc_elf_hash_entry (h)->has_addr16_ha 8876 && ppc_elf_hash_entry (h)->has_addr16_lo 8877 && htab->params->pic_fixup > 0))) 8878 { 8879 int skip; 8880 bfd_byte *loc; 8881 asection *sreloc; 8882 long indx = 0; 8883 8884 #ifdef DEBUG 8885 fprintf (stderr, "ppc_elf_relocate_section needs to " 8886 "create relocation for %s\n", 8887 (h && h->root.root.string 8888 ? h->root.root.string : "<unknown>")); 8889 #endif 8890 8891 /* When generating a shared object, these relocations 8892 are copied into the output file to be resolved at run 8893 time. */ 8894 skip = 0; 8895 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info, 8896 input_section, 8897 rel->r_offset); 8898 if (outrel.r_offset == (bfd_vma) -1 8899 || outrel.r_offset == (bfd_vma) -2) 8900 skip = (int) outrel.r_offset; 8901 outrel.r_offset += (input_section->output_section->vma 8902 + input_section->output_offset); 8903 8904 if (skip) 8905 memset (&outrel, 0, sizeof outrel); 8906 else if ((h != NULL 8907 && (h->root.type == bfd_link_hash_undefined 8908 || h->root.type == bfd_link_hash_undefweak)) 8909 || !SYMBOL_REFERENCES_LOCAL (info, h)) 8910 { 8911 indx = h->dynindx; 8912 BFD_ASSERT (indx != -1); 8913 unresolved_reloc = FALSE; 8914 outrel.r_info = ELF32_R_INFO (indx, r_type); 8915 outrel.r_addend = rel->r_addend; 8916 } 8917 else 8918 { 8919 outrel.r_addend = relocation + rel->r_addend; 8920 8921 if (r_type != R_PPC_ADDR32) 8922 { 8923 if (ifunc != NULL) 8924 { 8925 /* If we get here when building a static 8926 executable, then the libc startup function 8927 responsible for applying indirect function 8928 relocations is going to complain about 8929 the reloc type. 8930 If we get here when building a dynamic 8931 executable, it will be because we have 8932 a text relocation. The dynamic loader 8933 will set the text segment writable and 8934 non-executable to apply text relocations. 8935 So we'll segfault when trying to run the 8936 indirection function to resolve the reloc. */ 8937 info->callbacks->einfo 8938 /* xgettext:c-format */ 8939 (_("%H: relocation %s for indirect " 8940 "function %s unsupported\n"), 8941 input_bfd, input_section, rel->r_offset, 8942 howto->name, 8943 sym_name); 8944 ret = FALSE; 8945 } 8946 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec)) 8947 ; 8948 else if (sec == NULL || sec->owner == NULL) 8949 { 8950 bfd_set_error (bfd_error_bad_value); 8951 ret = FALSE; 8952 } 8953 else 8954 { 8955 asection *osec; 8956 8957 /* We are turning this relocation into one 8958 against a section symbol. It would be 8959 proper to subtract the symbol's value, 8960 osec->vma, from the emitted reloc addend, 8961 but ld.so expects buggy relocs. 8962 FIXME: Why not always use a zero index? */ 8963 osec = sec->output_section; 8964 indx = elf_section_data (osec)->dynindx; 8965 if (indx == 0) 8966 { 8967 osec = htab->elf.text_index_section; 8968 indx = elf_section_data (osec)->dynindx; 8969 } 8970 BFD_ASSERT (indx != 0); 8971 #ifdef DEBUG 8972 if (indx == 0) 8973 printf ("indx=%ld section=%s flags=%08x name=%s\n", 8974 indx, osec->name, osec->flags, 8975 h->root.root.string); 8976 #endif 8977 } 8978 8979 outrel.r_info = ELF32_R_INFO (indx, r_type); 8980 } 8981 else if (ifunc != NULL) 8982 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); 8983 else 8984 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE); 8985 } 8986 8987 sreloc = elf_section_data (input_section)->sreloc; 8988 if (ifunc) 8989 { 8990 sreloc = htab->elf.irelplt; 8991 if (indx == 0) 8992 htab->local_ifunc_resolver = 1; 8993 else if (is_static_defined (h)) 8994 htab->maybe_local_ifunc_resolver = 1; 8995 } 8996 if (sreloc == NULL) 8997 return FALSE; 8998 8999 loc = sreloc->contents; 9000 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 9001 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 9002 9003 if (skip == -1) 9004 goto copy_reloc; 9005 9006 /* This reloc will be computed at runtime. Clear the memory 9007 so that it contains a predictable value for prelink. */ 9008 if (!skip) 9009 { 9010 relocation = howto->pc_relative ? outrel.r_offset : 0; 9011 addend = 0; 9012 break; 9013 } 9014 } 9015 else if (r_type == R_PPC_DTPMOD32 9016 && htab->plt_type == PLT_NEW 9017 && !htab->params->no_tls_get_addr_opt 9018 && htab->tls_get_addr != NULL 9019 && htab->tls_get_addr->plt.plist != NULL) 9020 { 9021 /* Set up for __tls_get_addr_opt stub when this entry 9022 does not have dynamic relocs. */ 9023 relocation = 0; 9024 /* Set up the next word for local dynamic. If it turns 9025 out to be global dynamic, the reloc will overwrite 9026 this value. */ 9027 if (rel->r_offset + 8 <= input_section->size) 9028 bfd_put_32 (input_bfd, DTP_OFFSET - TP_OFFSET, 9029 contents + rel->r_offset + 4); 9030 } 9031 else if (r_type == R_PPC_DTPREL32 9032 && htab->plt_type == PLT_NEW 9033 && !htab->params->no_tls_get_addr_opt 9034 && htab->tls_get_addr != NULL 9035 && htab->tls_get_addr->plt.plist != NULL 9036 && rel > relocs 9037 && rel[-1].r_info == ELF32_R_INFO (r_symndx, R_PPC_DTPMOD32) 9038 && rel[-1].r_offset + 4 == rel->r_offset) 9039 { 9040 /* __tls_get_addr_opt stub value. */ 9041 addend += DTP_OFFSET - TP_OFFSET; 9042 } 9043 break; 9044 9045 case R_PPC_RELAX_PLT: 9046 case R_PPC_RELAX_PLTREL24: 9047 if (h != NULL) 9048 { 9049 struct plt_entry *ent; 9050 bfd_vma got2_addend = 0; 9051 9052 if (r_type == R_PPC_RELAX_PLTREL24) 9053 { 9054 if (bfd_link_pic (info)) 9055 got2_addend = addend; 9056 addend = 0; 9057 } 9058 ent = find_plt_ent (&h->plt.plist, got2, got2_addend); 9059 if (htab->plt_type == PLT_NEW) 9060 relocation = (htab->glink->output_section->vma 9061 + htab->glink->output_offset 9062 + ent->glink_offset); 9063 else 9064 relocation = (htab->elf.splt->output_section->vma 9065 + htab->elf.splt->output_offset 9066 + ent->plt.offset); 9067 } 9068 /* Fall through. */ 9069 9070 case R_PPC_RELAX: 9071 { 9072 const int *stub; 9073 size_t size; 9074 size_t insn_offset = rel->r_offset; 9075 unsigned int insn; 9076 9077 if (bfd_link_pic (info)) 9078 { 9079 relocation -= (input_section->output_section->vma 9080 + input_section->output_offset 9081 + rel->r_offset - 4); 9082 stub = shared_stub_entry; 9083 bfd_put_32 (input_bfd, stub[0], contents + insn_offset - 12); 9084 bfd_put_32 (input_bfd, stub[1], contents + insn_offset - 8); 9085 bfd_put_32 (input_bfd, stub[2], contents + insn_offset - 4); 9086 stub += 3; 9087 size = ARRAY_SIZE (shared_stub_entry) - 3; 9088 } 9089 else 9090 { 9091 stub = stub_entry; 9092 size = ARRAY_SIZE (stub_entry); 9093 } 9094 9095 relocation += addend; 9096 if (bfd_link_relocatable (info)) 9097 relocation = 0; 9098 9099 /* First insn is HA, second is LO. */ 9100 insn = *stub++; 9101 insn |= ((relocation + 0x8000) >> 16) & 0xffff; 9102 bfd_put_32 (input_bfd, insn, contents + insn_offset); 9103 insn_offset += 4; 9104 9105 insn = *stub++; 9106 insn |= relocation & 0xffff; 9107 bfd_put_32 (input_bfd, insn, contents + insn_offset); 9108 insn_offset += 4; 9109 size -= 2; 9110 9111 while (size != 0) 9112 { 9113 insn = *stub++; 9114 --size; 9115 bfd_put_32 (input_bfd, insn, contents + insn_offset); 9116 insn_offset += 4; 9117 } 9118 9119 /* Rewrite the reloc and convert one of the trailing nop 9120 relocs to describe this relocation. */ 9121 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE); 9122 /* The relocs are at the bottom 2 bytes */ 9123 wrel->r_offset = rel->r_offset + d_offset; 9124 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA); 9125 wrel->r_addend = rel->r_addend; 9126 memmove (wrel + 1, wrel, (relend - wrel - 1) * sizeof (*wrel)); 9127 wrel++, rel++; 9128 wrel->r_offset += 4; 9129 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO); 9130 } 9131 continue; 9132 9133 /* Indirect .sdata relocation. */ 9134 case R_PPC_EMB_SDAI16: 9135 BFD_ASSERT (htab->sdata[0].section != NULL); 9136 if (!is_static_defined (htab->sdata[0].sym)) 9137 { 9138 unresolved_reloc = TRUE; 9139 break; 9140 } 9141 relocation 9142 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0], 9143 h, relocation, rel); 9144 addend = 0; 9145 break; 9146 9147 /* Indirect .sdata2 relocation. */ 9148 case R_PPC_EMB_SDA2I16: 9149 BFD_ASSERT (htab->sdata[1].section != NULL); 9150 if (!is_static_defined (htab->sdata[1].sym)) 9151 { 9152 unresolved_reloc = TRUE; 9153 break; 9154 } 9155 relocation 9156 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1], 9157 h, relocation, rel); 9158 addend = 0; 9159 break; 9160 9161 /* Handle the TOC16 reloc. We want to use the offset within the .got 9162 section, not the actual VMA. This is appropriate when generating 9163 an embedded ELF object, for which the .got section acts like the 9164 AIX .toc section. */ 9165 case R_PPC_TOC16: /* phony GOT16 relocations */ 9166 if (sec == NULL || sec->output_section == NULL) 9167 { 9168 unresolved_reloc = TRUE; 9169 break; 9170 } 9171 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec), 9172 ".got") == 0 9173 || strcmp (bfd_get_section_name (sec->owner, sec), 9174 ".cgot") == 0); 9175 9176 addend -= sec->output_section->vma + sec->output_offset + 0x8000; 9177 break; 9178 9179 case R_PPC_PLTREL24: 9180 if (h != NULL && ifunc == NULL) 9181 { 9182 struct plt_entry *ent; 9183 9184 ent = find_plt_ent (&h->plt.plist, got2, 9185 bfd_link_pic (info) ? addend : 0); 9186 if (ent == NULL 9187 || htab->elf.splt == NULL) 9188 { 9189 /* We didn't make a PLT entry for this symbol. This 9190 happens when statically linking PIC code, or when 9191 using -Bsymbolic. */ 9192 } 9193 else 9194 { 9195 /* Relocation is to the entry for this symbol in the 9196 procedure linkage table. */ 9197 unresolved_reloc = FALSE; 9198 if (htab->plt_type == PLT_NEW) 9199 relocation = (htab->glink->output_section->vma 9200 + htab->glink->output_offset 9201 + ent->glink_offset); 9202 else 9203 relocation = (htab->elf.splt->output_section->vma 9204 + htab->elf.splt->output_offset 9205 + ent->plt.offset); 9206 } 9207 } 9208 9209 /* R_PPC_PLTREL24 is rather special. If non-zero, the 9210 addend specifies the GOT pointer offset within .got2. 9211 Don't apply it to the relocation field. */ 9212 addend = 0; 9213 break; 9214 9215 /* Relocate against _SDA_BASE_. */ 9216 case R_PPC_SDAREL16: 9217 { 9218 const char *name; 9219 struct elf_link_hash_entry *sda = htab->sdata[0].sym; 9220 9221 if (sec == NULL 9222 || sec->output_section == NULL 9223 || !is_static_defined (sda)) 9224 { 9225 unresolved_reloc = TRUE; 9226 break; 9227 } 9228 addend -= SYM_VAL (sda); 9229 9230 name = bfd_get_section_name (output_bfd, sec->output_section); 9231 if (!(strcmp (name, ".sdata") == 0 9232 || strcmp (name, ".sbss") == 0)) 9233 { 9234 info->callbacks->einfo 9235 /* xgettext:c-format */ 9236 (_("%P: %B: the target (%s) of a %s relocation is " 9237 "in the wrong output section (%s)\n"), 9238 input_bfd, 9239 sym_name, 9240 howto->name, 9241 name); 9242 } 9243 } 9244 break; 9245 9246 /* Relocate against _SDA2_BASE_. */ 9247 case R_PPC_EMB_SDA2REL: 9248 { 9249 const char *name; 9250 struct elf_link_hash_entry *sda = htab->sdata[1].sym; 9251 9252 if (sec == NULL 9253 || sec->output_section == NULL 9254 || !is_static_defined (sda)) 9255 { 9256 unresolved_reloc = TRUE; 9257 break; 9258 } 9259 addend -= SYM_VAL (sda); 9260 9261 name = bfd_get_section_name (output_bfd, sec->output_section); 9262 if (!(strcmp (name, ".sdata2") == 0 9263 || strcmp (name, ".sbss2") == 0)) 9264 { 9265 info->callbacks->einfo 9266 /* xgettext:c-format */ 9267 (_("%P: %B: the target (%s) of a %s relocation is " 9268 "in the wrong output section (%s)\n"), 9269 input_bfd, 9270 sym_name, 9271 howto->name, 9272 name); 9273 } 9274 } 9275 break; 9276 9277 case R_PPC_VLE_LO16A: 9278 relocation = relocation + addend; 9279 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset, 9280 contents + rel->r_offset, relocation, 9281 split16a_type, htab->params->vle_reloc_fixup); 9282 goto copy_reloc; 9283 9284 case R_PPC_VLE_LO16D: 9285 relocation = relocation + addend; 9286 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset, 9287 contents + rel->r_offset, relocation, 9288 split16d_type, htab->params->vle_reloc_fixup); 9289 goto copy_reloc; 9290 9291 case R_PPC_VLE_HI16A: 9292 relocation = (relocation + addend) >> 16; 9293 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset, 9294 contents + rel->r_offset, relocation, 9295 split16a_type, htab->params->vle_reloc_fixup); 9296 goto copy_reloc; 9297 9298 case R_PPC_VLE_HI16D: 9299 relocation = (relocation + addend) >> 16; 9300 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset, 9301 contents + rel->r_offset, relocation, 9302 split16d_type, htab->params->vle_reloc_fixup); 9303 goto copy_reloc; 9304 9305 case R_PPC_VLE_HA16A: 9306 relocation = (relocation + addend + 0x8000) >> 16; 9307 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset, 9308 contents + rel->r_offset, relocation, 9309 split16a_type, htab->params->vle_reloc_fixup); 9310 goto copy_reloc; 9311 9312 case R_PPC_VLE_HA16D: 9313 relocation = (relocation + addend + 0x8000) >> 16; 9314 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset, 9315 contents + rel->r_offset, relocation, 9316 split16d_type, htab->params->vle_reloc_fixup); 9317 goto copy_reloc; 9318 9319 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */ 9320 case R_PPC_EMB_SDA21: 9321 case R_PPC_VLE_SDA21: 9322 case R_PPC_EMB_RELSDA: 9323 case R_PPC_VLE_SDA21_LO: 9324 { 9325 const char *name; 9326 int reg; 9327 unsigned int insn; 9328 struct elf_link_hash_entry *sda = NULL; 9329 9330 if (sec == NULL || sec->output_section == NULL) 9331 { 9332 unresolved_reloc = TRUE; 9333 break; 9334 } 9335 9336 name = bfd_get_section_name (output_bfd, sec->output_section); 9337 if (strcmp (name, ".sdata") == 0 9338 || strcmp (name, ".sbss") == 0) 9339 { 9340 reg = 13; 9341 sda = htab->sdata[0].sym; 9342 } 9343 else if (strcmp (name, ".sdata2") == 0 9344 || strcmp (name, ".sbss2") == 0) 9345 { 9346 reg = 2; 9347 sda = htab->sdata[1].sym; 9348 } 9349 else if (strcmp (name, ".PPC.EMB.sdata0") == 0 9350 || strcmp (name, ".PPC.EMB.sbss0") == 0) 9351 { 9352 reg = 0; 9353 } 9354 else 9355 { 9356 info->callbacks->einfo 9357 /* xgettext:c-format */ 9358 (_("%P: %B: the target (%s) of a %s relocation is " 9359 "in the wrong output section (%s)\n"), 9360 input_bfd, 9361 sym_name, 9362 howto->name, 9363 name); 9364 9365 bfd_set_error (bfd_error_bad_value); 9366 ret = FALSE; 9367 goto copy_reloc; 9368 } 9369 9370 if (sda != NULL) 9371 { 9372 if (!is_static_defined (sda)) 9373 { 9374 unresolved_reloc = TRUE; 9375 break; 9376 } 9377 addend -= SYM_VAL (sda); 9378 } 9379 9380 insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 9381 if (reg == 0 9382 && (r_type == R_PPC_VLE_SDA21 9383 || r_type == R_PPC_VLE_SDA21_LO)) 9384 { 9385 relocation = relocation + addend; 9386 addend = 0; 9387 9388 /* Force e_li insn, keeping RT from original insn. */ 9389 insn &= 0x1f << 21; 9390 insn |= 28u << 26; 9391 9392 /* We have an li20 field, bits 17..20, 11..15, 21..31. */ 9393 /* Top 4 bits of value to 17..20. */ 9394 insn |= (relocation & 0xf0000) >> 5; 9395 /* Next 5 bits of the value to 11..15. */ 9396 insn |= (relocation & 0xf800) << 5; 9397 /* And the final 11 bits of the value to bits 21 to 31. */ 9398 insn |= relocation & 0x7ff; 9399 9400 bfd_put_32 (input_bfd, insn, contents + rel->r_offset); 9401 9402 if (r_type == R_PPC_VLE_SDA21 9403 && ((relocation + 0x80000) & 0xffffffff) > 0x100000) 9404 goto overflow; 9405 goto copy_reloc; 9406 } 9407 else if (r_type == R_PPC_EMB_SDA21 9408 || r_type == R_PPC_VLE_SDA21 9409 || r_type == R_PPC_VLE_SDA21_LO) 9410 { 9411 /* Fill in register field. */ 9412 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT); 9413 } 9414 bfd_put_32 (input_bfd, insn, contents + rel->r_offset); 9415 } 9416 break; 9417 9418 case R_PPC_VLE_SDAREL_LO16A: 9419 case R_PPC_VLE_SDAREL_LO16D: 9420 case R_PPC_VLE_SDAREL_HI16A: 9421 case R_PPC_VLE_SDAREL_HI16D: 9422 case R_PPC_VLE_SDAREL_HA16A: 9423 case R_PPC_VLE_SDAREL_HA16D: 9424 { 9425 bfd_vma value; 9426 const char *name; 9427 struct elf_link_hash_entry *sda = NULL; 9428 9429 if (sec == NULL || sec->output_section == NULL) 9430 { 9431 unresolved_reloc = TRUE; 9432 break; 9433 } 9434 9435 name = bfd_get_section_name (output_bfd, sec->output_section); 9436 if (strcmp (name, ".sdata") == 0 9437 || strcmp (name, ".sbss") == 0) 9438 sda = htab->sdata[0].sym; 9439 else if (strcmp (name, ".sdata2") == 0 9440 || strcmp (name, ".sbss2") == 0) 9441 sda = htab->sdata[1].sym; 9442 else 9443 { 9444 _bfd_error_handler 9445 /* xgettext:c-format */ 9446 (_("%B: the target (%s) of a %s relocation is " 9447 "in the wrong output section (%s)"), 9448 input_bfd, 9449 sym_name, 9450 howto->name, 9451 name); 9452 9453 bfd_set_error (bfd_error_bad_value); 9454 ret = FALSE; 9455 goto copy_reloc; 9456 } 9457 9458 if (sda == NULL || !is_static_defined (sda)) 9459 { 9460 unresolved_reloc = TRUE; 9461 break; 9462 } 9463 value = relocation + addend - SYM_VAL (sda); 9464 9465 if (r_type == R_PPC_VLE_SDAREL_LO16A) 9466 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset, 9467 contents + rel->r_offset, value, 9468 split16a_type, 9469 htab->params->vle_reloc_fixup); 9470 else if (r_type == R_PPC_VLE_SDAREL_LO16D) 9471 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset, 9472 contents + rel->r_offset, value, 9473 split16d_type, 9474 htab->params->vle_reloc_fixup); 9475 else if (r_type == R_PPC_VLE_SDAREL_HI16A) 9476 { 9477 value = value >> 16; 9478 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset, 9479 contents + rel->r_offset, value, 9480 split16a_type, 9481 htab->params->vle_reloc_fixup); 9482 } 9483 else if (r_type == R_PPC_VLE_SDAREL_HI16D) 9484 { 9485 value = value >> 16; 9486 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset, 9487 contents + rel->r_offset, value, 9488 split16d_type, 9489 htab->params->vle_reloc_fixup); 9490 } 9491 else if (r_type == R_PPC_VLE_SDAREL_HA16A) 9492 { 9493 value = (value + 0x8000) >> 16; 9494 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset, 9495 contents + rel->r_offset, value, 9496 split16a_type, 9497 htab->params->vle_reloc_fixup); 9498 } 9499 else if (r_type == R_PPC_VLE_SDAREL_HA16D) 9500 { 9501 value = (value + 0x8000) >> 16; 9502 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset, 9503 contents + rel->r_offset, value, 9504 split16d_type, 9505 htab->params->vle_reloc_fixup); 9506 } 9507 } 9508 goto copy_reloc; 9509 9510 /* Relocate against the beginning of the section. */ 9511 case R_PPC_SECTOFF: 9512 case R_PPC_SECTOFF_LO: 9513 case R_PPC_SECTOFF_HI: 9514 case R_PPC_SECTOFF_HA: 9515 if (sec == NULL || sec->output_section == NULL) 9516 { 9517 unresolved_reloc = TRUE; 9518 break; 9519 } 9520 addend -= sec->output_section->vma; 9521 break; 9522 9523 /* Negative relocations. */ 9524 case R_PPC_EMB_NADDR32: 9525 case R_PPC_EMB_NADDR16: 9526 case R_PPC_EMB_NADDR16_LO: 9527 case R_PPC_EMB_NADDR16_HI: 9528 case R_PPC_EMB_NADDR16_HA: 9529 addend -= 2 * relocation; 9530 break; 9531 9532 case R_PPC_COPY: 9533 case R_PPC_GLOB_DAT: 9534 case R_PPC_JMP_SLOT: 9535 case R_PPC_RELATIVE: 9536 case R_PPC_IRELATIVE: 9537 case R_PPC_PLT32: 9538 case R_PPC_PLTREL32: 9539 case R_PPC_PLT16_LO: 9540 case R_PPC_PLT16_HI: 9541 case R_PPC_PLT16_HA: 9542 case R_PPC_ADDR30: 9543 case R_PPC_EMB_RELSEC16: 9544 case R_PPC_EMB_RELST_LO: 9545 case R_PPC_EMB_RELST_HI: 9546 case R_PPC_EMB_RELST_HA: 9547 case R_PPC_EMB_BIT_FLD: 9548 info->callbacks->einfo 9549 /* xgettext:c-format */ 9550 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"), 9551 input_bfd, 9552 howto->name, 9553 sym_name); 9554 9555 bfd_set_error (bfd_error_invalid_operation); 9556 ret = FALSE; 9557 goto copy_reloc; 9558 } 9559 9560 /* Do any further special processing. */ 9561 switch (r_type) 9562 { 9563 default: 9564 break; 9565 9566 case R_PPC_ADDR16_HA: 9567 case R_PPC_REL16_HA: 9568 case R_PPC_REL16DX_HA: 9569 case R_PPC_SECTOFF_HA: 9570 case R_PPC_TPREL16_HA: 9571 case R_PPC_DTPREL16_HA: 9572 case R_PPC_EMB_NADDR16_HA: 9573 case R_PPC_EMB_RELST_HA: 9574 /* It's just possible that this symbol is a weak symbol 9575 that's not actually defined anywhere. In that case, 9576 'sec' would be NULL, and we should leave the symbol 9577 alone (it will be set to zero elsewhere in the link). */ 9578 if (sec == NULL) 9579 break; 9580 /* Fall through. */ 9581 9582 case R_PPC_PLT16_HA: 9583 case R_PPC_GOT16_HA: 9584 case R_PPC_GOT_TLSGD16_HA: 9585 case R_PPC_GOT_TLSLD16_HA: 9586 case R_PPC_GOT_TPREL16_HA: 9587 case R_PPC_GOT_DTPREL16_HA: 9588 /* Add 0x10000 if sign bit in 0:15 is set. 9589 Bits 0:15 are not used. */ 9590 addend += 0x8000; 9591 break; 9592 9593 case R_PPC_ADDR16: 9594 case R_PPC_ADDR16_LO: 9595 case R_PPC_GOT16: 9596 case R_PPC_GOT16_LO: 9597 case R_PPC_SDAREL16: 9598 case R_PPC_SECTOFF: 9599 case R_PPC_SECTOFF_LO: 9600 case R_PPC_DTPREL16: 9601 case R_PPC_DTPREL16_LO: 9602 case R_PPC_TPREL16: 9603 case R_PPC_TPREL16_LO: 9604 case R_PPC_GOT_TLSGD16: 9605 case R_PPC_GOT_TLSGD16_LO: 9606 case R_PPC_GOT_TLSLD16: 9607 case R_PPC_GOT_TLSLD16_LO: 9608 case R_PPC_GOT_DTPREL16: 9609 case R_PPC_GOT_DTPREL16_LO: 9610 case R_PPC_GOT_TPREL16: 9611 case R_PPC_GOT_TPREL16_LO: 9612 { 9613 /* The 32-bit ABI lacks proper relocations to deal with 9614 certain 64-bit instructions. Prevent damage to bits 9615 that make up part of the insn opcode. */ 9616 unsigned int insn, mask, lobit; 9617 9618 insn = bfd_get_32 (input_bfd, 9619 contents + rel->r_offset - d_offset); 9620 mask = 0; 9621 if (is_insn_ds_form (insn)) 9622 mask = 3; 9623 else if (is_insn_dq_form (insn)) 9624 mask = 15; 9625 else 9626 break; 9627 relocation += addend; 9628 addend = insn & mask; 9629 lobit = mask & relocation; 9630 if (lobit != 0) 9631 { 9632 relocation ^= lobit; 9633 info->callbacks->einfo 9634 /* xgettext:c-format */ 9635 (_("%H: error: %s against `%s' not a multiple of %u\n"), 9636 input_bfd, input_section, rel->r_offset, 9637 howto->name, sym_name, mask + 1); 9638 bfd_set_error (bfd_error_bad_value); 9639 ret = FALSE; 9640 } 9641 } 9642 break; 9643 } 9644 9645 #ifdef DEBUG 9646 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, " 9647 "offset = %ld, addend = %ld\n", 9648 howto->name, 9649 (int) r_type, 9650 sym_name, 9651 r_symndx, 9652 (long) rel->r_offset, 9653 (long) addend); 9654 #endif 9655 9656 if (unresolved_reloc 9657 && !((input_section->flags & SEC_DEBUGGING) != 0 9658 && h->def_dynamic) 9659 && _bfd_elf_section_offset (output_bfd, info, input_section, 9660 rel->r_offset) != (bfd_vma) -1) 9661 { 9662 info->callbacks->einfo 9663 /* xgettext:c-format */ 9664 (_("%H: unresolvable %s relocation against symbol `%s'\n"), 9665 input_bfd, input_section, rel->r_offset, 9666 howto->name, 9667 sym_name); 9668 ret = FALSE; 9669 } 9670 9671 /* 16-bit fields in insns mostly have signed values, but a 9672 few insns have 16-bit unsigned values. Really, we should 9673 have different reloc types. */ 9674 if (howto->complain_on_overflow != complain_overflow_dont 9675 && howto->dst_mask == 0xffff 9676 && (input_section->flags & SEC_CODE) != 0) 9677 { 9678 enum complain_overflow complain = complain_overflow_signed; 9679 9680 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0) 9681 { 9682 unsigned int insn; 9683 9684 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3)); 9685 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */) 9686 complain = complain_overflow_bitfield; 9687 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */ 9688 || (insn & (0x3f << 26)) == 24u << 26 /* ori */ 9689 || (insn & (0x3f << 26)) == 26u << 26 /* xori */) 9690 complain = complain_overflow_unsigned; 9691 } 9692 if (howto->complain_on_overflow != complain) 9693 { 9694 alt_howto = *howto; 9695 alt_howto.complain_on_overflow = complain; 9696 howto = &alt_howto; 9697 } 9698 } 9699 9700 if (r_type == R_PPC_REL16DX_HA) 9701 { 9702 /* Split field reloc isn't handled by _bfd_final_link_relocate. */ 9703 if (rel->r_offset + 4 > input_section->size) 9704 r = bfd_reloc_outofrange; 9705 else 9706 { 9707 unsigned int insn; 9708 9709 relocation += addend; 9710 relocation -= (rel->r_offset 9711 + input_section->output_offset 9712 + input_section->output_section->vma); 9713 relocation >>= 16; 9714 insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 9715 insn &= ~0x1fffc1; 9716 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15); 9717 bfd_put_32 (input_bfd, insn, contents + rel->r_offset); 9718 r = bfd_reloc_ok; 9719 } 9720 } 9721 else 9722 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents, 9723 rel->r_offset, relocation, addend); 9724 9725 if (r != bfd_reloc_ok) 9726 { 9727 if (r == bfd_reloc_overflow) 9728 { 9729 overflow: 9730 /* On code like "if (foo) foo();" don't report overflow 9731 on a branch to zero when foo is undefined. */ 9732 if (!warned 9733 && !(h != NULL 9734 && (h->root.type == bfd_link_hash_undefweak 9735 || h->root.type == bfd_link_hash_undefined) 9736 && is_branch_reloc (r_type))) 9737 info->callbacks->reloc_overflow 9738 (info, (h ? &h->root : NULL), sym_name, howto->name, 9739 rel->r_addend, input_bfd, input_section, rel->r_offset); 9740 } 9741 else 9742 { 9743 info->callbacks->einfo 9744 /* xgettext:c-format */ 9745 (_("%H: %s reloc against `%s': error %d\n"), 9746 input_bfd, input_section, rel->r_offset, 9747 howto->name, sym_name, (int) r); 9748 ret = FALSE; 9749 } 9750 } 9751 copy_reloc: 9752 if (wrel != rel) 9753 *wrel = *rel; 9754 } 9755 9756 if (wrel != rel) 9757 { 9758 Elf_Internal_Shdr *rel_hdr; 9759 size_t deleted = rel - wrel; 9760 9761 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); 9762 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; 9763 if (rel_hdr->sh_size == 0) 9764 { 9765 /* It is too late to remove an empty reloc section. Leave 9766 one NONE reloc. 9767 ??? What is wrong with an empty section??? */ 9768 rel_hdr->sh_size = rel_hdr->sh_entsize; 9769 deleted -= 1; 9770 wrel++; 9771 } 9772 relend = wrel; 9773 rel_hdr = _bfd_elf_single_rel_hdr (input_section); 9774 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; 9775 input_section->reloc_count -= deleted; 9776 } 9777 9778 #ifdef DEBUG 9779 fprintf (stderr, "\n"); 9780 #endif 9781 9782 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET 9783 && input_section->size != input_section->rawsize 9784 && (strcmp (input_section->output_section->name, ".init") == 0 9785 || strcmp (input_section->output_section->name, ".fini") == 0)) 9786 { 9787 /* Branch around the trampolines. */ 9788 unsigned int insn = B + input_section->size - input_section->rawsize; 9789 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize); 9790 } 9791 9792 if (htab->params->ppc476_workaround 9793 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET 9794 && (!bfd_link_relocatable (info) 9795 || (input_section->output_section->alignment_power 9796 >= htab->params->pagesize_p2))) 9797 { 9798 bfd_vma start_addr, end_addr, addr; 9799 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2; 9800 9801 if (relax_info->workaround_size != 0) 9802 { 9803 bfd_byte *p; 9804 unsigned int n; 9805 bfd_byte fill[4]; 9806 9807 bfd_put_32 (input_bfd, BA, fill); 9808 p = contents + input_section->size - relax_info->workaround_size; 9809 n = relax_info->workaround_size >> 2; 9810 while (n--) 9811 { 9812 memcpy (p, fill, 4); 9813 p += 4; 9814 } 9815 } 9816 9817 /* The idea is: Replace the last instruction on a page with a 9818 branch to a patch area. Put the insn there followed by a 9819 branch back to the next page. Complicated a little by 9820 needing to handle moved conditional branches, and by not 9821 wanting to touch data-in-text. */ 9822 9823 start_addr = (input_section->output_section->vma 9824 + input_section->output_offset); 9825 end_addr = (start_addr + input_section->size 9826 - relax_info->workaround_size); 9827 for (addr = ((start_addr & -pagesize) + pagesize - 4); 9828 addr < end_addr; 9829 addr += pagesize) 9830 { 9831 bfd_vma offset = addr - start_addr; 9832 Elf_Internal_Rela *lo, *hi; 9833 bfd_boolean is_data; 9834 bfd_vma patch_off, patch_addr; 9835 unsigned int insn; 9836 9837 /* Do we have a data reloc at this offset? If so, leave 9838 the word alone. */ 9839 is_data = FALSE; 9840 lo = relocs; 9841 hi = relend; 9842 rel = NULL; 9843 while (lo < hi) 9844 { 9845 rel = lo + (hi - lo) / 2; 9846 if (rel->r_offset < offset) 9847 lo = rel + 1; 9848 else if (rel->r_offset > offset + 3) 9849 hi = rel; 9850 else 9851 { 9852 switch (ELF32_R_TYPE (rel->r_info)) 9853 { 9854 case R_PPC_ADDR32: 9855 case R_PPC_UADDR32: 9856 case R_PPC_REL32: 9857 case R_PPC_ADDR30: 9858 is_data = TRUE; 9859 break; 9860 default: 9861 break; 9862 } 9863 break; 9864 } 9865 } 9866 if (is_data) 9867 continue; 9868 9869 /* Some instructions can be left alone too. Unconditional 9870 branches, except for bcctr with BO=0x14 (bctr, bctrl), 9871 avoid the icache failure. 9872 9873 The problem occurs due to prefetch across a page boundary 9874 where stale instructions can be fetched from the next 9875 page, and the mechanism for flushing these bad 9876 instructions fails under certain circumstances. The 9877 unconditional branches: 9878 1) Branch: b, bl, ba, bla, 9879 2) Branch Conditional: bc, bca, bcl, bcla, 9880 3) Branch Conditional to Link Register: bclr, bclrl, 9881 where (2) and (3) have BO=0x14 making them unconditional, 9882 prevent the bad prefetch because the prefetch itself is 9883 affected by these instructions. This happens even if the 9884 instruction is not executed. 9885 9886 A bctr example: 9887 . 9888 . lis 9,new_page@ha 9889 . addi 9,9,new_page@l 9890 . mtctr 9 9891 . bctr 9892 . nop 9893 . nop 9894 . new_page: 9895 . 9896 The bctr is not predicted taken due to ctr not being 9897 ready, so prefetch continues on past the bctr into the 9898 new page which might have stale instructions. If they 9899 fail to be flushed, then they will be executed after the 9900 bctr executes. Either of the following modifications 9901 prevent the bad prefetch from happening in the first 9902 place: 9903 . 9904 . lis 9,new_page@ha lis 9,new_page@ha 9905 . addi 9,9,new_page@l addi 9,9,new_page@l 9906 . mtctr 9 mtctr 9 9907 . bctr bctr 9908 . nop b somewhere_else 9909 . b somewhere_else nop 9910 . new_page: new_page: 9911 . */ 9912 insn = bfd_get_32 (input_bfd, contents + offset); 9913 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */ 9914 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/ 9915 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */ 9916 || ((insn & (0x3f << 26)) == (19u << 26) 9917 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */ 9918 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */ 9919 continue; 9920 9921 patch_addr = (start_addr + input_section->size 9922 - relax_info->workaround_size); 9923 patch_addr = (patch_addr + 15) & -16; 9924 patch_off = patch_addr - start_addr; 9925 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset); 9926 9927 if (rel != NULL 9928 && rel->r_offset >= offset 9929 && rel->r_offset < offset + 4) 9930 { 9931 asection *sreloc; 9932 9933 /* If the insn we are patching had a reloc, adjust the 9934 reloc r_offset so that the reloc applies to the moved 9935 location. This matters for -r and --emit-relocs. */ 9936 if (rel + 1 != relend) 9937 { 9938 Elf_Internal_Rela tmp = *rel; 9939 9940 /* Keep the relocs sorted by r_offset. */ 9941 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel)); 9942 relend[-1] = tmp; 9943 } 9944 relend[-1].r_offset += patch_off - offset; 9945 9946 /* Adjust REL16 addends too. */ 9947 switch (ELF32_R_TYPE (relend[-1].r_info)) 9948 { 9949 case R_PPC_REL16: 9950 case R_PPC_REL16_LO: 9951 case R_PPC_REL16_HI: 9952 case R_PPC_REL16_HA: 9953 relend[-1].r_addend += patch_off - offset; 9954 break; 9955 default: 9956 break; 9957 } 9958 9959 /* If we are building a PIE or shared library with 9960 non-PIC objects, perhaps we had a dynamic reloc too? 9961 If so, the dynamic reloc must move with the insn. */ 9962 sreloc = elf_section_data (input_section)->sreloc; 9963 if (sreloc != NULL) 9964 { 9965 Elf32_External_Rela *slo, *shi, *srelend; 9966 bfd_vma soffset; 9967 9968 slo = (Elf32_External_Rela *) sreloc->contents; 9969 shi = srelend = slo + sreloc->reloc_count; 9970 soffset = (offset + input_section->output_section->vma 9971 + input_section->output_offset); 9972 while (slo < shi) 9973 { 9974 Elf32_External_Rela *srel = slo + (shi - slo) / 2; 9975 bfd_elf32_swap_reloca_in (output_bfd, (bfd_byte *) srel, 9976 &outrel); 9977 if (outrel.r_offset < soffset) 9978 slo = srel + 1; 9979 else if (outrel.r_offset > soffset + 3) 9980 shi = srel; 9981 else 9982 { 9983 if (srel + 1 != srelend) 9984 { 9985 memmove (srel, srel + 1, 9986 (srelend - (srel + 1)) * sizeof (*srel)); 9987 srel = srelend - 1; 9988 } 9989 outrel.r_offset += patch_off - offset; 9990 bfd_elf32_swap_reloca_out (output_bfd, &outrel, 9991 (bfd_byte *) srel); 9992 break; 9993 } 9994 } 9995 } 9996 } 9997 else 9998 rel = NULL; 9999 10000 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */ 10001 && (insn & 2) == 0 /* relative */) 10002 { 10003 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000; 10004 10005 delta += offset - patch_off; 10006 if (bfd_link_relocatable (info) && rel != NULL) 10007 delta = 0; 10008 if (!bfd_link_relocatable (info) && rel != NULL) 10009 { 10010 enum elf_ppc_reloc_type r_type; 10011 10012 r_type = ELF32_R_TYPE (relend[-1].r_info); 10013 if (r_type == R_PPC_REL14_BRTAKEN) 10014 insn |= BRANCH_PREDICT_BIT; 10015 else if (r_type == R_PPC_REL14_BRNTAKEN) 10016 insn &= ~BRANCH_PREDICT_BIT; 10017 else 10018 BFD_ASSERT (r_type == R_PPC_REL14); 10019 10020 if ((r_type == R_PPC_REL14_BRTAKEN 10021 || r_type == R_PPC_REL14_BRNTAKEN) 10022 && delta + 0x8000 < 0x10000 10023 && (bfd_signed_vma) delta < 0) 10024 insn ^= BRANCH_PREDICT_BIT; 10025 } 10026 if (delta + 0x8000 < 0x10000) 10027 { 10028 bfd_put_32 (input_bfd, 10029 (insn & ~0xfffc) | (delta & 0xfffc), 10030 contents + patch_off); 10031 patch_off += 4; 10032 bfd_put_32 (input_bfd, 10033 B | ((offset + 4 - patch_off) & 0x3fffffc), 10034 contents + patch_off); 10035 patch_off += 4; 10036 } 10037 else 10038 { 10039 if (rel != NULL) 10040 { 10041 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info); 10042 10043 relend[-1].r_offset += 8; 10044 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24); 10045 } 10046 bfd_put_32 (input_bfd, 10047 (insn & ~0xfffc) | 8, 10048 contents + patch_off); 10049 patch_off += 4; 10050 bfd_put_32 (input_bfd, 10051 B | ((offset + 4 - patch_off) & 0x3fffffc), 10052 contents + patch_off); 10053 patch_off += 4; 10054 bfd_put_32 (input_bfd, 10055 B | ((delta - 8) & 0x3fffffc), 10056 contents + patch_off); 10057 patch_off += 4; 10058 } 10059 } 10060 else 10061 { 10062 bfd_put_32 (input_bfd, insn, contents + patch_off); 10063 patch_off += 4; 10064 bfd_put_32 (input_bfd, 10065 B | ((offset + 4 - patch_off) & 0x3fffffc), 10066 contents + patch_off); 10067 patch_off += 4; 10068 } 10069 BFD_ASSERT (patch_off <= input_section->size); 10070 relax_info->workaround_size = input_section->size - patch_off; 10071 } 10072 } 10073 10074 return ret; 10075 } 10076 10077 /* Finish up dynamic symbol handling. We set the contents of various 10078 dynamic sections here. */ 10079 10080 static bfd_boolean 10081 ppc_elf_finish_dynamic_symbol (bfd *output_bfd, 10082 struct bfd_link_info *info, 10083 struct elf_link_hash_entry *h, 10084 Elf_Internal_Sym *sym) 10085 { 10086 struct ppc_elf_link_hash_table *htab; 10087 struct plt_entry *ent; 10088 bfd_boolean doneone; 10089 10090 #ifdef DEBUG 10091 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s", 10092 h->root.root.string); 10093 #endif 10094 10095 htab = ppc_elf_hash_table (info); 10096 BFD_ASSERT (htab->elf.dynobj != NULL); 10097 10098 doneone = FALSE; 10099 for (ent = h->plt.plist; ent != NULL; ent = ent->next) 10100 if (ent->plt.offset != (bfd_vma) -1) 10101 { 10102 if (!doneone) 10103 { 10104 Elf_Internal_Rela rela; 10105 bfd_byte *loc; 10106 bfd_vma reloc_index; 10107 10108 if (htab->plt_type == PLT_NEW 10109 || !htab->elf.dynamic_sections_created 10110 || h->dynindx == -1) 10111 reloc_index = ent->plt.offset / 4; 10112 else 10113 { 10114 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size) 10115 / htab->plt_slot_size); 10116 if (reloc_index > PLT_NUM_SINGLE_ENTRIES 10117 && htab->plt_type == PLT_OLD) 10118 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2; 10119 } 10120 10121 /* This symbol has an entry in the procedure linkage table. 10122 Set it up. */ 10123 if (htab->plt_type == PLT_VXWORKS 10124 && htab->elf.dynamic_sections_created 10125 && h->dynindx != -1) 10126 { 10127 bfd_vma got_offset; 10128 const bfd_vma *plt_entry; 10129 10130 /* The first three entries in .got.plt are reserved. */ 10131 got_offset = (reloc_index + 3) * 4; 10132 10133 /* Use the right PLT. */ 10134 plt_entry = bfd_link_pic (info) ? ppc_elf_vxworks_pic_plt_entry 10135 : ppc_elf_vxworks_plt_entry; 10136 10137 /* Fill in the .plt on VxWorks. */ 10138 if (bfd_link_pic (info)) 10139 { 10140 bfd_put_32 (output_bfd, 10141 plt_entry[0] | PPC_HA (got_offset), 10142 htab->elf.splt->contents + ent->plt.offset + 0); 10143 bfd_put_32 (output_bfd, 10144 plt_entry[1] | PPC_LO (got_offset), 10145 htab->elf.splt->contents + ent->plt.offset + 4); 10146 } 10147 else 10148 { 10149 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot); 10150 10151 bfd_put_32 (output_bfd, 10152 plt_entry[0] | PPC_HA (got_loc), 10153 htab->elf.splt->contents + ent->plt.offset + 0); 10154 bfd_put_32 (output_bfd, 10155 plt_entry[1] | PPC_LO (got_loc), 10156 htab->elf.splt->contents + ent->plt.offset + 4); 10157 } 10158 10159 bfd_put_32 (output_bfd, plt_entry[2], 10160 htab->elf.splt->contents + ent->plt.offset + 8); 10161 bfd_put_32 (output_bfd, plt_entry[3], 10162 htab->elf.splt->contents + ent->plt.offset + 12); 10163 10164 /* This instruction is an immediate load. The value loaded is 10165 the byte offset of the R_PPC_JMP_SLOT relocation from the 10166 start of the .rela.plt section. The value is stored in the 10167 low-order 16 bits of the load instruction. */ 10168 /* NOTE: It appears that this is now an index rather than a 10169 prescaled offset. */ 10170 bfd_put_32 (output_bfd, 10171 plt_entry[4] | reloc_index, 10172 htab->elf.splt->contents + ent->plt.offset + 16); 10173 /* This instruction is a PC-relative branch whose target is 10174 the start of the PLT section. The address of this branch 10175 instruction is 20 bytes beyond the start of this PLT entry. 10176 The address is encoded in bits 6-29, inclusive. The value 10177 stored is right-shifted by two bits, permitting a 26-bit 10178 offset. */ 10179 bfd_put_32 (output_bfd, 10180 (plt_entry[5] 10181 | (-(ent->plt.offset + 20) & 0x03fffffc)), 10182 htab->elf.splt->contents + ent->plt.offset + 20); 10183 bfd_put_32 (output_bfd, plt_entry[6], 10184 htab->elf.splt->contents + ent->plt.offset + 24); 10185 bfd_put_32 (output_bfd, plt_entry[7], 10186 htab->elf.splt->contents + ent->plt.offset + 28); 10187 10188 /* Fill in the GOT entry corresponding to this PLT slot with 10189 the address immediately after the "bctr" instruction 10190 in this PLT entry. */ 10191 bfd_put_32 (output_bfd, (htab->elf.splt->output_section->vma 10192 + htab->elf.splt->output_offset 10193 + ent->plt.offset + 16), 10194 htab->elf.sgotplt->contents + got_offset); 10195 10196 if (!bfd_link_pic (info)) 10197 { 10198 /* Fill in a couple of entries in .rela.plt.unloaded. */ 10199 loc = htab->srelplt2->contents 10200 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index 10201 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS) 10202 * sizeof (Elf32_External_Rela)); 10203 10204 /* Provide the @ha relocation for the first instruction. */ 10205 rela.r_offset = (htab->elf.splt->output_section->vma 10206 + htab->elf.splt->output_offset 10207 + ent->plt.offset + 2); 10208 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, 10209 R_PPC_ADDR16_HA); 10210 rela.r_addend = got_offset; 10211 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 10212 loc += sizeof (Elf32_External_Rela); 10213 10214 /* Provide the @l relocation for the second instruction. */ 10215 rela.r_offset = (htab->elf.splt->output_section->vma 10216 + htab->elf.splt->output_offset 10217 + ent->plt.offset + 6); 10218 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, 10219 R_PPC_ADDR16_LO); 10220 rela.r_addend = got_offset; 10221 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 10222 loc += sizeof (Elf32_External_Rela); 10223 10224 /* Provide a relocation for the GOT entry corresponding to this 10225 PLT slot. Point it at the middle of the .plt entry. */ 10226 rela.r_offset = (htab->elf.sgotplt->output_section->vma 10227 + htab->elf.sgotplt->output_offset 10228 + got_offset); 10229 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx, 10230 R_PPC_ADDR32); 10231 rela.r_addend = ent->plt.offset + 16; 10232 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 10233 } 10234 10235 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT. 10236 In particular, the offset for the relocation is not the 10237 address of the PLT entry for this function, as specified 10238 by the ABI. Instead, the offset is set to the address of 10239 the GOT slot for this function. See EABI 4.4.4.1. */ 10240 rela.r_offset = (htab->elf.sgotplt->output_section->vma 10241 + htab->elf.sgotplt->output_offset 10242 + got_offset); 10243 10244 } 10245 else 10246 { 10247 asection *splt = htab->elf.splt; 10248 if (!htab->elf.dynamic_sections_created 10249 || h->dynindx == -1) 10250 splt = htab->elf.iplt; 10251 10252 rela.r_offset = (splt->output_section->vma 10253 + splt->output_offset 10254 + ent->plt.offset); 10255 if (htab->plt_type == PLT_OLD 10256 || !htab->elf.dynamic_sections_created 10257 || h->dynindx == -1) 10258 { 10259 /* We don't need to fill in the .plt. The ppc dynamic 10260 linker will fill it in. */ 10261 } 10262 else 10263 { 10264 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset 10265 + htab->glink->output_section->vma 10266 + htab->glink->output_offset); 10267 bfd_put_32 (output_bfd, val, 10268 splt->contents + ent->plt.offset); 10269 } 10270 } 10271 10272 /* Fill in the entry in the .rela.plt section. */ 10273 rela.r_addend = 0; 10274 if (!htab->elf.dynamic_sections_created 10275 || h->dynindx == -1) 10276 { 10277 BFD_ASSERT (h->type == STT_GNU_IFUNC 10278 && h->def_regular 10279 && (h->root.type == bfd_link_hash_defined 10280 || h->root.type == bfd_link_hash_defweak)); 10281 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); 10282 rela.r_addend = SYM_VAL (h); 10283 } 10284 else 10285 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT); 10286 10287 if (!htab->elf.dynamic_sections_created 10288 || h->dynindx == -1) 10289 { 10290 loc = (htab->elf.irelplt->contents 10291 + (htab->elf.irelplt->reloc_count++ 10292 * sizeof (Elf32_External_Rela))); 10293 htab->local_ifunc_resolver = 1; 10294 } 10295 else 10296 { 10297 loc = (htab->elf.srelplt->contents 10298 + reloc_index * sizeof (Elf32_External_Rela)); 10299 if (h->type == STT_GNU_IFUNC && is_static_defined (h)) 10300 htab->maybe_local_ifunc_resolver = 1; 10301 } 10302 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 10303 10304 if (!h->def_regular) 10305 { 10306 /* Mark the symbol as undefined, rather than as 10307 defined in the .plt section. Leave the value if 10308 there were any relocations where pointer equality 10309 matters (this is a clue for the dynamic linker, to 10310 make function pointer comparisons work between an 10311 application and shared library), otherwise set it 10312 to zero. */ 10313 sym->st_shndx = SHN_UNDEF; 10314 if (!h->pointer_equality_needed) 10315 sym->st_value = 0; 10316 else if (!h->ref_regular_nonweak) 10317 { 10318 /* This breaks function pointer comparisons, but 10319 that is better than breaking tests for a NULL 10320 function pointer. */ 10321 sym->st_value = 0; 10322 } 10323 } 10324 else if (h->type == STT_GNU_IFUNC 10325 && !bfd_link_pic (info)) 10326 { 10327 /* Set the value of ifunc symbols in a non-pie 10328 executable to the glink entry. This is to avoid 10329 text relocations. We can't do this for ifunc in 10330 allocate_dynrelocs, as we do for normal dynamic 10331 function symbols with plt entries, because we need 10332 to keep the original value around for the ifunc 10333 relocation. */ 10334 sym->st_shndx = (_bfd_elf_section_from_bfd_section 10335 (output_bfd, htab->glink->output_section)); 10336 sym->st_value = (ent->glink_offset 10337 + htab->glink->output_offset 10338 + htab->glink->output_section->vma); 10339 } 10340 doneone = TRUE; 10341 } 10342 10343 if (htab->plt_type == PLT_NEW 10344 || !htab->elf.dynamic_sections_created 10345 || h->dynindx == -1) 10346 { 10347 unsigned char *p; 10348 asection *splt = htab->elf.splt; 10349 if (!htab->elf.dynamic_sections_created 10350 || h->dynindx == -1) 10351 splt = htab->elf.iplt; 10352 10353 p = (unsigned char *) htab->glink->contents + ent->glink_offset; 10354 10355 if (h == htab->tls_get_addr && !htab->params->no_tls_get_addr_opt) 10356 { 10357 bfd_put_32 (output_bfd, LWZ_11_3, p); 10358 p += 4; 10359 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p); 10360 p += 4; 10361 bfd_put_32 (output_bfd, MR_0_3, p); 10362 p += 4; 10363 bfd_put_32 (output_bfd, CMPWI_11_0, p); 10364 p += 4; 10365 bfd_put_32 (output_bfd, ADD_3_12_2, p); 10366 p += 4; 10367 bfd_put_32 (output_bfd, BEQLR, p); 10368 p += 4; 10369 bfd_put_32 (output_bfd, MR_3_0, p); 10370 p += 4; 10371 bfd_put_32 (output_bfd, NOP, p); 10372 p += 4; 10373 } 10374 10375 write_glink_stub (ent, splt, p, info); 10376 10377 if (!bfd_link_pic (info)) 10378 /* We only need one non-PIC glink stub. */ 10379 break; 10380 } 10381 else 10382 break; 10383 } 10384 10385 if (h->needs_copy) 10386 { 10387 asection *s; 10388 Elf_Internal_Rela rela; 10389 bfd_byte *loc; 10390 10391 /* This symbols needs a copy reloc. Set it up. */ 10392 10393 #ifdef DEBUG 10394 fprintf (stderr, ", copy"); 10395 #endif 10396 10397 BFD_ASSERT (h->dynindx != -1); 10398 10399 if (ppc_elf_hash_entry (h)->has_sda_refs) 10400 s = htab->relsbss; 10401 else if (h->root.u.def.section == htab->elf.sdynrelro) 10402 s = htab->elf.sreldynrelro; 10403 else 10404 s = htab->elf.srelbss; 10405 BFD_ASSERT (s != NULL); 10406 10407 rela.r_offset = SYM_VAL (h); 10408 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY); 10409 rela.r_addend = 0; 10410 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); 10411 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 10412 } 10413 10414 #ifdef DEBUG 10415 fprintf (stderr, "\n"); 10416 #endif 10417 10418 return TRUE; 10419 } 10420 10421 static enum elf_reloc_type_class 10422 ppc_elf_reloc_type_class (const struct bfd_link_info *info, 10423 const asection *rel_sec, 10424 const Elf_Internal_Rela *rela) 10425 { 10426 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 10427 10428 if (rel_sec == htab->elf.irelplt) 10429 return reloc_class_ifunc; 10430 10431 switch (ELF32_R_TYPE (rela->r_info)) 10432 { 10433 case R_PPC_RELATIVE: 10434 return reloc_class_relative; 10435 case R_PPC_JMP_SLOT: 10436 return reloc_class_plt; 10437 case R_PPC_COPY: 10438 return reloc_class_copy; 10439 default: 10440 return reloc_class_normal; 10441 } 10442 } 10443 10444 /* Finish up the dynamic sections. */ 10445 10446 static bfd_boolean 10447 ppc_elf_finish_dynamic_sections (bfd *output_bfd, 10448 struct bfd_link_info *info) 10449 { 10450 asection *sdyn; 10451 struct ppc_elf_link_hash_table *htab; 10452 bfd_vma got; 10453 bfd *dynobj; 10454 bfd_boolean ret = TRUE; 10455 10456 #ifdef DEBUG 10457 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n"); 10458 #endif 10459 10460 htab = ppc_elf_hash_table (info); 10461 dynobj = htab->elf.dynobj; 10462 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 10463 10464 got = 0; 10465 if (htab->elf.hgot != NULL) 10466 got = SYM_VAL (htab->elf.hgot); 10467 10468 if (htab->elf.dynamic_sections_created) 10469 { 10470 Elf32_External_Dyn *dyncon, *dynconend; 10471 10472 BFD_ASSERT (htab->elf.splt != NULL && sdyn != NULL); 10473 10474 dyncon = (Elf32_External_Dyn *) sdyn->contents; 10475 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); 10476 for (; dyncon < dynconend; dyncon++) 10477 { 10478 Elf_Internal_Dyn dyn; 10479 asection *s; 10480 10481 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); 10482 10483 switch (dyn.d_tag) 10484 { 10485 case DT_PLTGOT: 10486 if (htab->is_vxworks) 10487 s = htab->elf.sgotplt; 10488 else 10489 s = htab->elf.splt; 10490 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 10491 break; 10492 10493 case DT_PLTRELSZ: 10494 dyn.d_un.d_val = htab->elf.srelplt->size; 10495 break; 10496 10497 case DT_JMPREL: 10498 s = htab->elf.srelplt; 10499 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 10500 break; 10501 10502 case DT_PPC_GOT: 10503 dyn.d_un.d_ptr = got; 10504 break; 10505 10506 case DT_TEXTREL: 10507 if (htab->local_ifunc_resolver) 10508 info->callbacks->einfo 10509 (_("%X%P: text relocations and GNU indirect " 10510 "functions will result in a segfault at runtime\n")); 10511 else if (htab->maybe_local_ifunc_resolver) 10512 info->callbacks->einfo 10513 (_("%P: warning: text relocations and GNU indirect " 10514 "functions may result in a segfault at runtime\n")); 10515 continue; 10516 10517 default: 10518 if (htab->is_vxworks 10519 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn)) 10520 break; 10521 continue; 10522 } 10523 10524 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 10525 } 10526 } 10527 10528 if (htab->elf.sgot != NULL 10529 && htab->elf.sgot->output_section != bfd_abs_section_ptr) 10530 { 10531 if (htab->elf.hgot->root.u.def.section == htab->elf.sgot 10532 || htab->elf.hgot->root.u.def.section == htab->elf.sgotplt) 10533 { 10534 unsigned char *p = htab->elf.hgot->root.u.def.section->contents; 10535 10536 p += htab->elf.hgot->root.u.def.value; 10537 if (htab->plt_type == PLT_OLD) 10538 { 10539 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 10540 so that a function can easily find the address of 10541 _GLOBAL_OFFSET_TABLE_. */ 10542 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4 10543 < htab->elf.hgot->root.u.def.section->size); 10544 bfd_put_32 (output_bfd, 0x4e800021, p - 4); 10545 } 10546 10547 if (sdyn != NULL) 10548 { 10549 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset; 10550 BFD_ASSERT (htab->elf.hgot->root.u.def.value 10551 < htab->elf.hgot->root.u.def.section->size); 10552 bfd_put_32 (output_bfd, val, p); 10553 } 10554 } 10555 else 10556 { 10557 /* xgettext:c-format */ 10558 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"), 10559 htab->elf.hgot->root.root.string, 10560 (htab->elf.sgotplt != NULL 10561 ? htab->elf.sgotplt->name 10562 : htab->elf.sgot->name)); 10563 bfd_set_error (bfd_error_bad_value); 10564 ret = FALSE; 10565 } 10566 10567 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4; 10568 } 10569 10570 /* Fill in the first entry in the VxWorks procedure linkage table. */ 10571 if (htab->is_vxworks 10572 && htab->elf.splt != NULL 10573 && htab->elf.splt->size != 0 10574 && htab->elf.splt->output_section != bfd_abs_section_ptr) 10575 { 10576 asection *splt = htab->elf.splt; 10577 /* Use the right PLT. */ 10578 const bfd_vma *plt_entry = (bfd_link_pic (info) 10579 ? ppc_elf_vxworks_pic_plt0_entry 10580 : ppc_elf_vxworks_plt0_entry); 10581 10582 if (!bfd_link_pic (info)) 10583 { 10584 bfd_vma got_value = SYM_VAL (htab->elf.hgot); 10585 10586 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value), 10587 splt->contents + 0); 10588 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value), 10589 splt->contents + 4); 10590 } 10591 else 10592 { 10593 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0); 10594 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4); 10595 } 10596 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8); 10597 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12); 10598 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16); 10599 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20); 10600 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24); 10601 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28); 10602 10603 if (! bfd_link_pic (info)) 10604 { 10605 Elf_Internal_Rela rela; 10606 bfd_byte *loc; 10607 10608 loc = htab->srelplt2->contents; 10609 10610 /* Output the @ha relocation for the first instruction. */ 10611 rela.r_offset = (htab->elf.splt->output_section->vma 10612 + htab->elf.splt->output_offset 10613 + 2); 10614 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA); 10615 rela.r_addend = 0; 10616 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 10617 loc += sizeof (Elf32_External_Rela); 10618 10619 /* Output the @l relocation for the second instruction. */ 10620 rela.r_offset = (htab->elf.splt->output_section->vma 10621 + htab->elf.splt->output_offset 10622 + 6); 10623 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO); 10624 rela.r_addend = 0; 10625 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 10626 loc += sizeof (Elf32_External_Rela); 10627 10628 /* Fix up the remaining relocations. They may have the wrong 10629 symbol index for _G_O_T_ or _P_L_T_ depending on the order 10630 in which symbols were output. */ 10631 while (loc < htab->srelplt2->contents + htab->srelplt2->size) 10632 { 10633 Elf_Internal_Rela rel; 10634 10635 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); 10636 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA); 10637 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); 10638 loc += sizeof (Elf32_External_Rela); 10639 10640 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); 10641 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO); 10642 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); 10643 loc += sizeof (Elf32_External_Rela); 10644 10645 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); 10646 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32); 10647 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); 10648 loc += sizeof (Elf32_External_Rela); 10649 } 10650 } 10651 } 10652 10653 if (htab->glink != NULL 10654 && htab->glink->contents != NULL 10655 && htab->elf.dynamic_sections_created) 10656 { 10657 unsigned char *p; 10658 unsigned char *endp; 10659 bfd_vma res0; 10660 unsigned int i; 10661 10662 /* 10663 * PIC glink code is the following: 10664 * 10665 * # ith PLT code stub. 10666 * addis 11,30,(plt+(i-1)*4-got)@ha 10667 * lwz 11,(plt+(i-1)*4-got)@l(11) 10668 * mtctr 11 10669 * bctr 10670 * 10671 * # A table of branches, one for each plt entry. 10672 * # The idea is that the plt call stub loads ctr and r11 with these 10673 * # addresses, so (r11 - res_0) gives the plt index * 4. 10674 * res_0: b PLTresolve 10675 * res_1: b PLTresolve 10676 * . 10677 * # Some number of entries towards the end can be nops 10678 * res_n_m3: nop 10679 * res_n_m2: nop 10680 * res_n_m1: 10681 * 10682 * PLTresolve: 10683 * addis 11,11,(1f-res_0)@ha 10684 * mflr 0 10685 * bcl 20,31,1f 10686 * 1: addi 11,11,(1b-res_0)@l 10687 * mflr 12 10688 * mtlr 0 10689 * sub 11,11,12 # r11 = index * 4 10690 * addis 12,12,(got+4-1b)@ha 10691 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve 10692 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address 10693 * mtctr 0 10694 * add 0,11,11 10695 * add 11,0,11 # r11 = index * 12 = reloc offset. 10696 * bctr 10697 */ 10698 static const unsigned int pic_plt_resolve[] = 10699 { 10700 ADDIS_11_11, 10701 MFLR_0, 10702 BCL_20_31, 10703 ADDI_11_11, 10704 MFLR_12, 10705 MTLR_0, 10706 SUB_11_11_12, 10707 ADDIS_12_12, 10708 LWZ_0_12, 10709 LWZ_12_12, 10710 MTCTR_0, 10711 ADD_0_11_11, 10712 ADD_11_0_11, 10713 BCTR, 10714 NOP, 10715 NOP 10716 }; 10717 10718 /* 10719 * Non-PIC glink code is a little simpler. 10720 * 10721 * # ith PLT code stub. 10722 * lis 11,(plt+(i-1)*4)@ha 10723 * lwz 11,(plt+(i-1)*4)@l(11) 10724 * mtctr 11 10725 * bctr 10726 * 10727 * The branch table is the same, then comes 10728 * 10729 * PLTresolve: 10730 * lis 12,(got+4)@ha 10731 * addis 11,11,(-res_0)@ha 10732 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve 10733 * addi 11,11,(-res_0)@l # r11 = index * 4 10734 * mtctr 0 10735 * add 0,11,11 10736 * lwz 12,(got+8)@l(12) # got[2] contains the map address 10737 * add 11,0,11 # r11 = index * 12 = reloc offset. 10738 * bctr 10739 */ 10740 static const unsigned int plt_resolve[] = 10741 { 10742 LIS_12, 10743 ADDIS_11_11, 10744 LWZ_0_12, 10745 ADDI_11_11, 10746 MTCTR_0, 10747 ADD_0_11_11, 10748 LWZ_12_12, 10749 ADD_11_0_11, 10750 BCTR, 10751 NOP, 10752 NOP, 10753 NOP, 10754 NOP, 10755 NOP, 10756 NOP, 10757 NOP 10758 }; 10759 10760 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4) 10761 abort (); 10762 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4) 10763 abort (); 10764 10765 /* Build the branch table, one for each plt entry (less one), 10766 and perhaps some padding. */ 10767 p = htab->glink->contents; 10768 p += htab->glink_pltresolve; 10769 endp = htab->glink->contents; 10770 endp += htab->glink->size - GLINK_PLTRESOLVE; 10771 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4)) 10772 { 10773 bfd_put_32 (output_bfd, B + endp - p, p); 10774 p += 4; 10775 } 10776 while (p < endp) 10777 { 10778 bfd_put_32 (output_bfd, NOP, p); 10779 p += 4; 10780 } 10781 10782 res0 = (htab->glink_pltresolve 10783 + htab->glink->output_section->vma 10784 + htab->glink->output_offset); 10785 10786 if (htab->params->ppc476_workaround) 10787 { 10788 /* Ensure that a call stub at the end of a page doesn't 10789 result in prefetch over the end of the page into the 10790 glink branch table. */ 10791 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2; 10792 bfd_vma page_addr; 10793 bfd_vma glink_start = (htab->glink->output_section->vma 10794 + htab->glink->output_offset); 10795 10796 for (page_addr = res0 & -pagesize; 10797 page_addr > glink_start; 10798 page_addr -= pagesize) 10799 { 10800 /* We have a plt call stub that may need fixing. */ 10801 bfd_byte *loc; 10802 unsigned int insn; 10803 10804 loc = htab->glink->contents + page_addr - 4 - glink_start; 10805 insn = bfd_get_32 (output_bfd, loc); 10806 if (insn == BCTR) 10807 { 10808 /* By alignment, we know that there must be at least 10809 one other call stub before this one. */ 10810 insn = bfd_get_32 (output_bfd, loc - 16); 10811 if (insn == BCTR) 10812 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc); 10813 else 10814 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc); 10815 } 10816 } 10817 } 10818 10819 /* Last comes the PLTresolve stub. */ 10820 if (bfd_link_pic (info)) 10821 { 10822 bfd_vma bcl; 10823 10824 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++) 10825 { 10826 unsigned int insn = pic_plt_resolve[i]; 10827 10828 if (htab->params->ppc476_workaround && insn == NOP) 10829 insn = BA + 0; 10830 bfd_put_32 (output_bfd, insn, p); 10831 p += 4; 10832 } 10833 p -= 4 * ARRAY_SIZE (pic_plt_resolve); 10834 10835 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4 10836 + htab->glink->output_section->vma 10837 + htab->glink->output_offset); 10838 10839 bfd_put_32 (output_bfd, 10840 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4); 10841 bfd_put_32 (output_bfd, 10842 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4); 10843 bfd_put_32 (output_bfd, 10844 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4); 10845 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl)) 10846 { 10847 bfd_put_32 (output_bfd, 10848 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4); 10849 bfd_put_32 (output_bfd, 10850 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4); 10851 } 10852 else 10853 { 10854 bfd_put_32 (output_bfd, 10855 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4); 10856 bfd_put_32 (output_bfd, 10857 LWZ_12_12 + 4, p + 9*4); 10858 } 10859 } 10860 else 10861 { 10862 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++) 10863 { 10864 unsigned int insn = plt_resolve[i]; 10865 10866 if (htab->params->ppc476_workaround && insn == NOP) 10867 insn = BA + 0; 10868 bfd_put_32 (output_bfd, insn, p); 10869 p += 4; 10870 } 10871 p -= 4 * ARRAY_SIZE (plt_resolve); 10872 10873 bfd_put_32 (output_bfd, 10874 LIS_12 + PPC_HA (got + 4), p + 0*4); 10875 bfd_put_32 (output_bfd, 10876 ADDIS_11_11 + PPC_HA (-res0), p + 1*4); 10877 bfd_put_32 (output_bfd, 10878 ADDI_11_11 + PPC_LO (-res0), p + 3*4); 10879 if (PPC_HA (got + 4) == PPC_HA (got + 8)) 10880 { 10881 bfd_put_32 (output_bfd, 10882 LWZ_0_12 + PPC_LO (got + 4), p + 2*4); 10883 bfd_put_32 (output_bfd, 10884 LWZ_12_12 + PPC_LO (got + 8), p + 6*4); 10885 } 10886 else 10887 { 10888 bfd_put_32 (output_bfd, 10889 LWZU_0_12 + PPC_LO (got + 4), p + 2*4); 10890 bfd_put_32 (output_bfd, 10891 LWZ_12_12 + 4, p + 6*4); 10892 } 10893 } 10894 } 10895 10896 if (htab->glink_eh_frame != NULL 10897 && htab->glink_eh_frame->contents != NULL) 10898 { 10899 unsigned char *p = htab->glink_eh_frame->contents; 10900 bfd_vma val; 10901 10902 p += sizeof (glink_eh_frame_cie); 10903 /* FDE length. */ 10904 p += 4; 10905 /* CIE pointer. */ 10906 p += 4; 10907 /* Offset to .glink. */ 10908 val = (htab->glink->output_section->vma 10909 + htab->glink->output_offset); 10910 val -= (htab->glink_eh_frame->output_section->vma 10911 + htab->glink_eh_frame->output_offset); 10912 val -= p - htab->glink_eh_frame->contents; 10913 bfd_put_32 (htab->elf.dynobj, val, p); 10914 10915 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME 10916 && !_bfd_elf_write_section_eh_frame (output_bfd, info, 10917 htab->glink_eh_frame, 10918 htab->glink_eh_frame->contents)) 10919 return FALSE; 10920 } 10921 10922 return ret; 10923 } 10924 10925 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec 10926 #define TARGET_LITTLE_NAME "elf32-powerpcle" 10927 #define TARGET_BIG_SYM powerpc_elf32_vec 10928 #define TARGET_BIG_NAME "elf32-powerpc" 10929 #define ELF_ARCH bfd_arch_powerpc 10930 #define ELF_TARGET_ID PPC32_ELF_DATA 10931 #define ELF_MACHINE_CODE EM_PPC 10932 #ifdef __QNXTARGET__ 10933 #define ELF_MAXPAGESIZE 0x1000 10934 #define ELF_COMMONPAGESIZE 0x1000 10935 #else 10936 #define ELF_MAXPAGESIZE 0x10000 10937 #define ELF_COMMONPAGESIZE 0x10000 10938 #endif 10939 #define ELF_MINPAGESIZE 0x1000 10940 #define elf_info_to_howto ppc_elf_info_to_howto 10941 10942 #ifdef EM_CYGNUS_POWERPC 10943 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC 10944 #endif 10945 10946 #ifdef EM_PPC_OLD 10947 #define ELF_MACHINE_ALT2 EM_PPC_OLD 10948 #endif 10949 10950 #define elf_backend_plt_not_loaded 1 10951 #define elf_backend_want_dynrelro 1 10952 #define elf_backend_can_gc_sections 1 10953 #define elf_backend_can_refcount 1 10954 #define elf_backend_rela_normal 1 10955 #define elf_backend_caches_rawsize 1 10956 10957 #define bfd_elf32_mkobject ppc_elf_mkobject 10958 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data 10959 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section 10960 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup 10961 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup 10962 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags 10963 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create 10964 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab 10965 10966 #define elf_backend_object_p ppc_elf_object_p 10967 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook 10968 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook 10969 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr 10970 #define elf_backend_relocate_section ppc_elf_relocate_section 10971 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections 10972 #define elf_backend_check_relocs ppc_elf_check_relocs 10973 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol 10974 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol 10975 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook 10976 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections 10977 #define elf_backend_hash_symbol ppc_elf_hash_symbol 10978 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol 10979 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections 10980 #define elf_backend_fake_sections ppc_elf_fake_sections 10981 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers 10982 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map 10983 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus 10984 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo 10985 #define elf_backend_write_core_note ppc_elf_write_core_note 10986 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class 10987 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing 10988 #define elf_backend_final_write_processing ppc_elf_final_write_processing 10989 #define elf_backend_write_section ppc_elf_write_section 10990 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr 10991 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val 10992 #define elf_backend_action_discarded ppc_elf_action_discarded 10993 #define elf_backend_init_index_section _bfd_elf_init_1_index_section 10994 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags 10995 10996 #include "elf32-target.h" 10997 10998 /* FreeBSD Target */ 10999 11000 #undef TARGET_LITTLE_SYM 11001 #undef TARGET_LITTLE_NAME 11002 11003 #undef TARGET_BIG_SYM 11004 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec 11005 #undef TARGET_BIG_NAME 11006 #define TARGET_BIG_NAME "elf32-powerpc-freebsd" 11007 11008 #undef ELF_OSABI 11009 #define ELF_OSABI ELFOSABI_FREEBSD 11010 11011 #undef elf32_bed 11012 #define elf32_bed elf32_powerpc_fbsd_bed 11013 11014 #include "elf32-target.h" 11015 11016 /* VxWorks Target */ 11017 11018 #undef TARGET_LITTLE_SYM 11019 #undef TARGET_LITTLE_NAME 11020 11021 #undef TARGET_BIG_SYM 11022 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec 11023 #undef TARGET_BIG_NAME 11024 #define TARGET_BIG_NAME "elf32-powerpc-vxworks" 11025 11026 #undef ELF_OSABI 11027 11028 /* VxWorks uses the elf default section flags for .plt. */ 11029 static const struct bfd_elf_special_section * 11030 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd, asection *sec) 11031 { 11032 if (sec->name == NULL) 11033 return NULL; 11034 11035 if (strcmp (sec->name, ".plt") == 0) 11036 return _bfd_elf_get_sec_type_attr (abfd, sec); 11037 11038 return ppc_elf_get_sec_type_attr (abfd, sec); 11039 } 11040 11041 /* Like ppc_elf_link_hash_table_create, but overrides 11042 appropriately for VxWorks. */ 11043 static struct bfd_link_hash_table * 11044 ppc_elf_vxworks_link_hash_table_create (bfd *abfd) 11045 { 11046 struct bfd_link_hash_table *ret; 11047 11048 ret = ppc_elf_link_hash_table_create (abfd); 11049 if (ret) 11050 { 11051 struct ppc_elf_link_hash_table *htab 11052 = (struct ppc_elf_link_hash_table *)ret; 11053 htab->is_vxworks = 1; 11054 htab->plt_type = PLT_VXWORKS; 11055 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE; 11056 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE; 11057 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE; 11058 } 11059 return ret; 11060 } 11061 11062 /* Tweak magic VxWorks symbols as they are loaded. */ 11063 static bfd_boolean 11064 ppc_elf_vxworks_add_symbol_hook (bfd *abfd, 11065 struct bfd_link_info *info, 11066 Elf_Internal_Sym *sym, 11067 const char **namep, 11068 flagword *flagsp, 11069 asection **secp, 11070 bfd_vma *valp) 11071 { 11072 if (!elf_vxworks_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, 11073 valp)) 11074 return FALSE; 11075 11076 return ppc_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp); 11077 } 11078 11079 static void 11080 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker) 11081 { 11082 ppc_elf_final_write_processing (abfd, linker); 11083 elf_vxworks_final_write_processing (abfd, linker); 11084 } 11085 11086 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so 11087 define it. */ 11088 #undef elf_backend_want_plt_sym 11089 #define elf_backend_want_plt_sym 1 11090 #undef elf_backend_want_got_plt 11091 #define elf_backend_want_got_plt 1 11092 #undef elf_backend_got_symbol_offset 11093 #define elf_backend_got_symbol_offset 0 11094 #undef elf_backend_plt_not_loaded 11095 #define elf_backend_plt_not_loaded 0 11096 #undef elf_backend_plt_readonly 11097 #define elf_backend_plt_readonly 1 11098 #undef elf_backend_got_header_size 11099 #define elf_backend_got_header_size 12 11100 #undef elf_backend_dtrel_excludes_plt 11101 #define elf_backend_dtrel_excludes_plt 1 11102 11103 #undef bfd_elf32_get_synthetic_symtab 11104 11105 #undef bfd_elf32_bfd_link_hash_table_create 11106 #define bfd_elf32_bfd_link_hash_table_create \ 11107 ppc_elf_vxworks_link_hash_table_create 11108 #undef elf_backend_add_symbol_hook 11109 #define elf_backend_add_symbol_hook \ 11110 ppc_elf_vxworks_add_symbol_hook 11111 #undef elf_backend_link_output_symbol_hook 11112 #define elf_backend_link_output_symbol_hook \ 11113 elf_vxworks_link_output_symbol_hook 11114 #undef elf_backend_final_write_processing 11115 #define elf_backend_final_write_processing \ 11116 ppc_elf_vxworks_final_write_processing 11117 #undef elf_backend_get_sec_type_attr 11118 #define elf_backend_get_sec_type_attr \ 11119 ppc_elf_vxworks_get_sec_type_attr 11120 #undef elf_backend_emit_relocs 11121 #define elf_backend_emit_relocs \ 11122 elf_vxworks_emit_relocs 11123 11124 #undef elf32_bed 11125 #define elf32_bed ppc_elf_vxworks_bed 11126 #undef elf_backend_post_process_headers 11127 11128 #include "elf32-target.h" 11129