1 /* PowerPC-specific support for 32-bit ELF 2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 3 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 4 Free Software Foundation, Inc. 5 Written by Ian Lance Taylor, Cygnus Support. 6 7 This file is part of BFD, the Binary File Descriptor library. 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 3 of the License, or 12 (at your option) any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program; if not, write to the 21 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, 22 Boston, MA 02110-1301, USA. */ 23 24 25 /* This file is based on a preliminary PowerPC ELF ABI. The 26 information may not match the final PowerPC ELF ABI. It includes 27 suggestions from the in-progress Embedded PowerPC ABI, and that 28 information may also not match. */ 29 30 #include "sysdep.h" 31 #include <stdarg.h> 32 #include "bfd.h" 33 #include "bfdlink.h" 34 #include "libbfd.h" 35 #include "elf-bfd.h" 36 #include "elf/ppc.h" 37 #include "elf32-ppc.h" 38 #include "elf-vxworks.h" 39 #include "dwarf2.h" 40 #include "elf-linux-psinfo.h" 41 42 typedef enum split16_format_type 43 { 44 split16a_type = 0, 45 split16d_type 46 } 47 split16_format_type; 48 49 /* RELA relocations are used here. */ 50 51 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc 52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 53 static bfd_reloc_status_type ppc_elf_unhandled_reloc 54 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 55 static void ppc_elf_vle_split16 56 (bfd *, bfd_byte *, bfd_vma, bfd_vma, split16_format_type); 57 58 /* Branch prediction bit for branch taken relocs. */ 59 #define BRANCH_PREDICT_BIT 0x200000 60 /* Mask to set RA in memory instructions. */ 61 #define RA_REGISTER_MASK 0x001f0000 62 /* Value to shift register by to insert RA. */ 63 #define RA_REGISTER_SHIFT 16 64 65 /* The name of the dynamic interpreter. This is put in the .interp 66 section. */ 67 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" 68 69 /* For old-style PLT. */ 70 /* The number of single-slot PLT entries (the rest use two slots). */ 71 #define PLT_NUM_SINGLE_ENTRIES 8192 72 73 /* For new-style .glink and .plt. */ 74 #define GLINK_PLTRESOLVE 16*4 75 #define GLINK_ENTRY_SIZE 4*4 76 #define TLS_GET_ADDR_GLINK_SIZE 12*4 77 78 /* VxWorks uses its own plt layout, filled in by the static linker. */ 79 80 /* The standard VxWorks PLT entry. */ 81 #define VXWORKS_PLT_ENTRY_SIZE 32 82 static const bfd_vma ppc_elf_vxworks_plt_entry 83 [VXWORKS_PLT_ENTRY_SIZE / 4] = 84 { 85 0x3d800000, /* lis r12,0 */ 86 0x818c0000, /* lwz r12,0(r12) */ 87 0x7d8903a6, /* mtctr r12 */ 88 0x4e800420, /* bctr */ 89 0x39600000, /* li r11,0 */ 90 0x48000000, /* b 14 <.PLT0resolve+0x4> */ 91 0x60000000, /* nop */ 92 0x60000000, /* nop */ 93 }; 94 static const bfd_vma ppc_elf_vxworks_pic_plt_entry 95 [VXWORKS_PLT_ENTRY_SIZE / 4] = 96 { 97 0x3d9e0000, /* addis r12,r30,0 */ 98 0x818c0000, /* lwz r12,0(r12) */ 99 0x7d8903a6, /* mtctr r12 */ 100 0x4e800420, /* bctr */ 101 0x39600000, /* li r11,0 */ 102 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */ 103 0x60000000, /* nop */ 104 0x60000000, /* nop */ 105 }; 106 107 /* The initial VxWorks PLT entry. */ 108 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32 109 static const bfd_vma ppc_elf_vxworks_plt0_entry 110 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] = 111 { 112 0x3d800000, /* lis r12,0 */ 113 0x398c0000, /* addi r12,r12,0 */ 114 0x800c0008, /* lwz r0,8(r12) */ 115 0x7c0903a6, /* mtctr r0 */ 116 0x818c0004, /* lwz r12,4(r12) */ 117 0x4e800420, /* bctr */ 118 0x60000000, /* nop */ 119 0x60000000, /* nop */ 120 }; 121 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry 122 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] = 123 { 124 0x819e0008, /* lwz r12,8(r30) */ 125 0x7d8903a6, /* mtctr r12 */ 126 0x819e0004, /* lwz r12,4(r30) */ 127 0x4e800420, /* bctr */ 128 0x60000000, /* nop */ 129 0x60000000, /* nop */ 130 0x60000000, /* nop */ 131 0x60000000, /* nop */ 132 }; 133 134 /* For executables, we have some additional relocations in 135 .rela.plt.unloaded, for the kernel loader. */ 136 137 /* The number of non-JMP_SLOT relocations per PLT0 slot. */ 138 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3 139 /* The number of relocations in the PLTResolve slot. */ 140 #define VXWORKS_PLTRESOLVE_RELOCS 2 141 /* The number of relocations in the PLTResolve slot when when creating 142 a shared library. */ 143 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0 144 145 /* Some instructions. */ 146 #define ADDIS_11_11 0x3d6b0000 147 #define ADDIS_11_30 0x3d7e0000 148 #define ADDIS_12_12 0x3d8c0000 149 #define ADDI_11_11 0x396b0000 150 #define ADD_0_11_11 0x7c0b5a14 151 #define ADD_3_12_2 0x7c6c1214 152 #define ADD_11_0_11 0x7d605a14 153 #define B 0x48000000 154 #define BCL_20_31 0x429f0005 155 #define BCTR 0x4e800420 156 #define BEQLR 0x4d820020 157 #define CMPWI_11_0 0x2c0b0000 158 #define LIS_11 0x3d600000 159 #define LIS_12 0x3d800000 160 #define LWZU_0_12 0x840c0000 161 #define LWZ_0_12 0x800c0000 162 #define LWZ_11_3 0x81630000 163 #define LWZ_11_11 0x816b0000 164 #define LWZ_11_30 0x817e0000 165 #define LWZ_12_3 0x81830000 166 #define LWZ_12_12 0x818c0000 167 #define MR_0_3 0x7c601b78 168 #define MR_3_0 0x7c030378 169 #define MFLR_0 0x7c0802a6 170 #define MFLR_12 0x7d8802a6 171 #define MTCTR_0 0x7c0903a6 172 #define MTCTR_11 0x7d6903a6 173 #define MTLR_0 0x7c0803a6 174 #define NOP 0x60000000 175 #define SUB_11_11_12 0x7d6c5850 176 177 /* Offset of tp and dtp pointers from start of TLS block. */ 178 #define TP_OFFSET 0x7000 179 #define DTP_OFFSET 0x8000 180 181 /* The value of a defined global symbol. */ 182 #define SYM_VAL(SYM) \ 183 ((SYM)->root.u.def.section->output_section->vma \ 184 + (SYM)->root.u.def.section->output_offset \ 185 + (SYM)->root.u.def.value) 186 187 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max]; 188 189 static reloc_howto_type ppc_elf_howto_raw[] = { 190 /* This reloc does nothing. */ 191 HOWTO (R_PPC_NONE, /* type */ 192 0, /* rightshift */ 193 2, /* size (0 = byte, 1 = short, 2 = long) */ 194 32, /* bitsize */ 195 FALSE, /* pc_relative */ 196 0, /* bitpos */ 197 complain_overflow_bitfield, /* complain_on_overflow */ 198 bfd_elf_generic_reloc, /* special_function */ 199 "R_PPC_NONE", /* name */ 200 FALSE, /* partial_inplace */ 201 0, /* src_mask */ 202 0, /* dst_mask */ 203 FALSE), /* pcrel_offset */ 204 205 /* A standard 32 bit relocation. */ 206 HOWTO (R_PPC_ADDR32, /* type */ 207 0, /* rightshift */ 208 2, /* size (0 = byte, 1 = short, 2 = long) */ 209 32, /* bitsize */ 210 FALSE, /* pc_relative */ 211 0, /* bitpos */ 212 complain_overflow_bitfield, /* complain_on_overflow */ 213 bfd_elf_generic_reloc, /* special_function */ 214 "R_PPC_ADDR32", /* name */ 215 FALSE, /* partial_inplace */ 216 0, /* src_mask */ 217 0xffffffff, /* dst_mask */ 218 FALSE), /* pcrel_offset */ 219 220 /* An absolute 26 bit branch; the lower two bits must be zero. 221 FIXME: we don't check that, we just clear them. */ 222 HOWTO (R_PPC_ADDR24, /* type */ 223 0, /* rightshift */ 224 2, /* size (0 = byte, 1 = short, 2 = long) */ 225 26, /* bitsize */ 226 FALSE, /* pc_relative */ 227 0, /* bitpos */ 228 complain_overflow_bitfield, /* complain_on_overflow */ 229 bfd_elf_generic_reloc, /* special_function */ 230 "R_PPC_ADDR24", /* name */ 231 FALSE, /* partial_inplace */ 232 0, /* src_mask */ 233 0x3fffffc, /* dst_mask */ 234 FALSE), /* pcrel_offset */ 235 236 /* A standard 16 bit relocation. */ 237 HOWTO (R_PPC_ADDR16, /* type */ 238 0, /* rightshift */ 239 1, /* size (0 = byte, 1 = short, 2 = long) */ 240 16, /* bitsize */ 241 FALSE, /* pc_relative */ 242 0, /* bitpos */ 243 complain_overflow_bitfield, /* complain_on_overflow */ 244 bfd_elf_generic_reloc, /* special_function */ 245 "R_PPC_ADDR16", /* name */ 246 FALSE, /* partial_inplace */ 247 0, /* src_mask */ 248 0xffff, /* dst_mask */ 249 FALSE), /* pcrel_offset */ 250 251 /* A 16 bit relocation without overflow. */ 252 HOWTO (R_PPC_ADDR16_LO, /* type */ 253 0, /* rightshift */ 254 1, /* size (0 = byte, 1 = short, 2 = long) */ 255 16, /* bitsize */ 256 FALSE, /* pc_relative */ 257 0, /* bitpos */ 258 complain_overflow_dont,/* complain_on_overflow */ 259 bfd_elf_generic_reloc, /* special_function */ 260 "R_PPC_ADDR16_LO", /* name */ 261 FALSE, /* partial_inplace */ 262 0, /* src_mask */ 263 0xffff, /* dst_mask */ 264 FALSE), /* pcrel_offset */ 265 266 /* The high order 16 bits of an address. */ 267 HOWTO (R_PPC_ADDR16_HI, /* type */ 268 16, /* rightshift */ 269 1, /* size (0 = byte, 1 = short, 2 = long) */ 270 16, /* bitsize */ 271 FALSE, /* pc_relative */ 272 0, /* bitpos */ 273 complain_overflow_dont, /* complain_on_overflow */ 274 bfd_elf_generic_reloc, /* special_function */ 275 "R_PPC_ADDR16_HI", /* name */ 276 FALSE, /* partial_inplace */ 277 0, /* src_mask */ 278 0xffff, /* dst_mask */ 279 FALSE), /* pcrel_offset */ 280 281 /* The high order 16 bits of an address, plus 1 if the contents of 282 the low 16 bits, treated as a signed number, is negative. */ 283 HOWTO (R_PPC_ADDR16_HA, /* type */ 284 16, /* rightshift */ 285 1, /* size (0 = byte, 1 = short, 2 = long) */ 286 16, /* bitsize */ 287 FALSE, /* pc_relative */ 288 0, /* bitpos */ 289 complain_overflow_dont, /* complain_on_overflow */ 290 ppc_elf_addr16_ha_reloc, /* special_function */ 291 "R_PPC_ADDR16_HA", /* name */ 292 FALSE, /* partial_inplace */ 293 0, /* src_mask */ 294 0xffff, /* dst_mask */ 295 FALSE), /* pcrel_offset */ 296 297 /* An absolute 16 bit branch; the lower two bits must be zero. 298 FIXME: we don't check that, we just clear them. */ 299 HOWTO (R_PPC_ADDR14, /* type */ 300 0, /* rightshift */ 301 2, /* size (0 = byte, 1 = short, 2 = long) */ 302 16, /* bitsize */ 303 FALSE, /* pc_relative */ 304 0, /* bitpos */ 305 complain_overflow_bitfield, /* complain_on_overflow */ 306 bfd_elf_generic_reloc, /* special_function */ 307 "R_PPC_ADDR14", /* name */ 308 FALSE, /* partial_inplace */ 309 0, /* src_mask */ 310 0xfffc, /* dst_mask */ 311 FALSE), /* pcrel_offset */ 312 313 /* An absolute 16 bit branch, for which bit 10 should be set to 314 indicate that the branch is expected to be taken. The lower two 315 bits must be zero. */ 316 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */ 317 0, /* rightshift */ 318 2, /* size (0 = byte, 1 = short, 2 = long) */ 319 16, /* bitsize */ 320 FALSE, /* pc_relative */ 321 0, /* bitpos */ 322 complain_overflow_bitfield, /* complain_on_overflow */ 323 bfd_elf_generic_reloc, /* special_function */ 324 "R_PPC_ADDR14_BRTAKEN",/* name */ 325 FALSE, /* partial_inplace */ 326 0, /* src_mask */ 327 0xfffc, /* dst_mask */ 328 FALSE), /* pcrel_offset */ 329 330 /* An absolute 16 bit branch, for which bit 10 should be set to 331 indicate that the branch is not expected to be taken. The lower 332 two bits must be zero. */ 333 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */ 334 0, /* rightshift */ 335 2, /* size (0 = byte, 1 = short, 2 = long) */ 336 16, /* bitsize */ 337 FALSE, /* pc_relative */ 338 0, /* bitpos */ 339 complain_overflow_bitfield, /* complain_on_overflow */ 340 bfd_elf_generic_reloc, /* special_function */ 341 "R_PPC_ADDR14_BRNTAKEN",/* name */ 342 FALSE, /* partial_inplace */ 343 0, /* src_mask */ 344 0xfffc, /* dst_mask */ 345 FALSE), /* pcrel_offset */ 346 347 /* A relative 26 bit branch; the lower two bits must be zero. */ 348 HOWTO (R_PPC_REL24, /* type */ 349 0, /* rightshift */ 350 2, /* size (0 = byte, 1 = short, 2 = long) */ 351 26, /* bitsize */ 352 TRUE, /* pc_relative */ 353 0, /* bitpos */ 354 complain_overflow_signed, /* complain_on_overflow */ 355 bfd_elf_generic_reloc, /* special_function */ 356 "R_PPC_REL24", /* name */ 357 FALSE, /* partial_inplace */ 358 0, /* src_mask */ 359 0x3fffffc, /* dst_mask */ 360 TRUE), /* pcrel_offset */ 361 362 /* A relative 16 bit branch; the lower two bits must be zero. */ 363 HOWTO (R_PPC_REL14, /* type */ 364 0, /* rightshift */ 365 2, /* size (0 = byte, 1 = short, 2 = long) */ 366 16, /* bitsize */ 367 TRUE, /* pc_relative */ 368 0, /* bitpos */ 369 complain_overflow_signed, /* complain_on_overflow */ 370 bfd_elf_generic_reloc, /* special_function */ 371 "R_PPC_REL14", /* name */ 372 FALSE, /* partial_inplace */ 373 0, /* src_mask */ 374 0xfffc, /* dst_mask */ 375 TRUE), /* pcrel_offset */ 376 377 /* A relative 16 bit branch. Bit 10 should be set to indicate that 378 the branch is expected to be taken. The lower two bits must be 379 zero. */ 380 HOWTO (R_PPC_REL14_BRTAKEN, /* type */ 381 0, /* rightshift */ 382 2, /* size (0 = byte, 1 = short, 2 = long) */ 383 16, /* bitsize */ 384 TRUE, /* pc_relative */ 385 0, /* bitpos */ 386 complain_overflow_signed, /* complain_on_overflow */ 387 bfd_elf_generic_reloc, /* special_function */ 388 "R_PPC_REL14_BRTAKEN", /* name */ 389 FALSE, /* partial_inplace */ 390 0, /* src_mask */ 391 0xfffc, /* dst_mask */ 392 TRUE), /* pcrel_offset */ 393 394 /* A relative 16 bit branch. Bit 10 should be set to indicate that 395 the branch is not expected to be taken. The lower two bits must 396 be zero. */ 397 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */ 398 0, /* rightshift */ 399 2, /* size (0 = byte, 1 = short, 2 = long) */ 400 16, /* bitsize */ 401 TRUE, /* pc_relative */ 402 0, /* bitpos */ 403 complain_overflow_signed, /* complain_on_overflow */ 404 bfd_elf_generic_reloc, /* special_function */ 405 "R_PPC_REL14_BRNTAKEN",/* name */ 406 FALSE, /* partial_inplace */ 407 0, /* src_mask */ 408 0xfffc, /* dst_mask */ 409 TRUE), /* pcrel_offset */ 410 411 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the 412 symbol. */ 413 HOWTO (R_PPC_GOT16, /* type */ 414 0, /* rightshift */ 415 1, /* size (0 = byte, 1 = short, 2 = long) */ 416 16, /* bitsize */ 417 FALSE, /* pc_relative */ 418 0, /* bitpos */ 419 complain_overflow_signed, /* complain_on_overflow */ 420 bfd_elf_generic_reloc, /* special_function */ 421 "R_PPC_GOT16", /* name */ 422 FALSE, /* partial_inplace */ 423 0, /* src_mask */ 424 0xffff, /* dst_mask */ 425 FALSE), /* pcrel_offset */ 426 427 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for 428 the symbol. */ 429 HOWTO (R_PPC_GOT16_LO, /* type */ 430 0, /* rightshift */ 431 1, /* size (0 = byte, 1 = short, 2 = long) */ 432 16, /* bitsize */ 433 FALSE, /* pc_relative */ 434 0, /* bitpos */ 435 complain_overflow_dont, /* complain_on_overflow */ 436 bfd_elf_generic_reloc, /* special_function */ 437 "R_PPC_GOT16_LO", /* name */ 438 FALSE, /* partial_inplace */ 439 0, /* src_mask */ 440 0xffff, /* dst_mask */ 441 FALSE), /* pcrel_offset */ 442 443 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for 444 the symbol. */ 445 HOWTO (R_PPC_GOT16_HI, /* type */ 446 16, /* rightshift */ 447 1, /* size (0 = byte, 1 = short, 2 = long) */ 448 16, /* bitsize */ 449 FALSE, /* pc_relative */ 450 0, /* bitpos */ 451 complain_overflow_bitfield, /* complain_on_overflow */ 452 bfd_elf_generic_reloc, /* special_function */ 453 "R_PPC_GOT16_HI", /* name */ 454 FALSE, /* partial_inplace */ 455 0, /* src_mask */ 456 0xffff, /* dst_mask */ 457 FALSE), /* pcrel_offset */ 458 459 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for 460 the symbol. */ 461 HOWTO (R_PPC_GOT16_HA, /* type */ 462 16, /* rightshift */ 463 1, /* size (0 = byte, 1 = short, 2 = long) */ 464 16, /* bitsize */ 465 FALSE, /* pc_relative */ 466 0, /* bitpos */ 467 complain_overflow_bitfield, /* complain_on_overflow */ 468 ppc_elf_addr16_ha_reloc, /* special_function */ 469 "R_PPC_GOT16_HA", /* name */ 470 FALSE, /* partial_inplace */ 471 0, /* src_mask */ 472 0xffff, /* dst_mask */ 473 FALSE), /* pcrel_offset */ 474 475 /* Like R_PPC_REL24, but referring to the procedure linkage table 476 entry for the symbol. */ 477 HOWTO (R_PPC_PLTREL24, /* type */ 478 0, /* rightshift */ 479 2, /* size (0 = byte, 1 = short, 2 = long) */ 480 26, /* bitsize */ 481 TRUE, /* pc_relative */ 482 0, /* bitpos */ 483 complain_overflow_signed, /* complain_on_overflow */ 484 bfd_elf_generic_reloc, /* special_function */ 485 "R_PPC_PLTREL24", /* name */ 486 FALSE, /* partial_inplace */ 487 0, /* src_mask */ 488 0x3fffffc, /* dst_mask */ 489 TRUE), /* pcrel_offset */ 490 491 /* This is used only by the dynamic linker. The symbol should exist 492 both in the object being run and in some shared library. The 493 dynamic linker copies the data addressed by the symbol from the 494 shared library into the object, because the object being 495 run has to have the data at some particular address. */ 496 HOWTO (R_PPC_COPY, /* type */ 497 0, /* rightshift */ 498 2, /* size (0 = byte, 1 = short, 2 = long) */ 499 32, /* bitsize */ 500 FALSE, /* pc_relative */ 501 0, /* bitpos */ 502 complain_overflow_bitfield, /* complain_on_overflow */ 503 bfd_elf_generic_reloc, /* special_function */ 504 "R_PPC_COPY", /* name */ 505 FALSE, /* partial_inplace */ 506 0, /* src_mask */ 507 0, /* dst_mask */ 508 FALSE), /* pcrel_offset */ 509 510 /* Like R_PPC_ADDR32, but used when setting global offset table 511 entries. */ 512 HOWTO (R_PPC_GLOB_DAT, /* type */ 513 0, /* rightshift */ 514 2, /* size (0 = byte, 1 = short, 2 = long) */ 515 32, /* bitsize */ 516 FALSE, /* pc_relative */ 517 0, /* bitpos */ 518 complain_overflow_bitfield, /* complain_on_overflow */ 519 bfd_elf_generic_reloc, /* special_function */ 520 "R_PPC_GLOB_DAT", /* name */ 521 FALSE, /* partial_inplace */ 522 0, /* src_mask */ 523 0xffffffff, /* dst_mask */ 524 FALSE), /* pcrel_offset */ 525 526 /* Marks a procedure linkage table entry for a symbol. */ 527 HOWTO (R_PPC_JMP_SLOT, /* type */ 528 0, /* rightshift */ 529 2, /* size (0 = byte, 1 = short, 2 = long) */ 530 32, /* bitsize */ 531 FALSE, /* pc_relative */ 532 0, /* bitpos */ 533 complain_overflow_bitfield, /* complain_on_overflow */ 534 bfd_elf_generic_reloc, /* special_function */ 535 "R_PPC_JMP_SLOT", /* name */ 536 FALSE, /* partial_inplace */ 537 0, /* src_mask */ 538 0, /* dst_mask */ 539 FALSE), /* pcrel_offset */ 540 541 /* Used only by the dynamic linker. When the object is run, this 542 longword is set to the load address of the object, plus the 543 addend. */ 544 HOWTO (R_PPC_RELATIVE, /* type */ 545 0, /* rightshift */ 546 2, /* size (0 = byte, 1 = short, 2 = long) */ 547 32, /* bitsize */ 548 FALSE, /* pc_relative */ 549 0, /* bitpos */ 550 complain_overflow_bitfield, /* complain_on_overflow */ 551 bfd_elf_generic_reloc, /* special_function */ 552 "R_PPC_RELATIVE", /* name */ 553 FALSE, /* partial_inplace */ 554 0, /* src_mask */ 555 0xffffffff, /* dst_mask */ 556 FALSE), /* pcrel_offset */ 557 558 /* Like R_PPC_REL24, but uses the value of the symbol within the 559 object rather than the final value. Normally used for 560 _GLOBAL_OFFSET_TABLE_. */ 561 HOWTO (R_PPC_LOCAL24PC, /* type */ 562 0, /* rightshift */ 563 2, /* size (0 = byte, 1 = short, 2 = long) */ 564 26, /* bitsize */ 565 TRUE, /* pc_relative */ 566 0, /* bitpos */ 567 complain_overflow_signed, /* complain_on_overflow */ 568 bfd_elf_generic_reloc, /* special_function */ 569 "R_PPC_LOCAL24PC", /* name */ 570 FALSE, /* partial_inplace */ 571 0, /* src_mask */ 572 0x3fffffc, /* dst_mask */ 573 TRUE), /* pcrel_offset */ 574 575 /* Like R_PPC_ADDR32, but may be unaligned. */ 576 HOWTO (R_PPC_UADDR32, /* type */ 577 0, /* rightshift */ 578 2, /* size (0 = byte, 1 = short, 2 = long) */ 579 32, /* bitsize */ 580 FALSE, /* pc_relative */ 581 0, /* bitpos */ 582 complain_overflow_bitfield, /* complain_on_overflow */ 583 bfd_elf_generic_reloc, /* special_function */ 584 "R_PPC_UADDR32", /* name */ 585 FALSE, /* partial_inplace */ 586 0, /* src_mask */ 587 0xffffffff, /* dst_mask */ 588 FALSE), /* pcrel_offset */ 589 590 /* Like R_PPC_ADDR16, but may be unaligned. */ 591 HOWTO (R_PPC_UADDR16, /* type */ 592 0, /* rightshift */ 593 1, /* size (0 = byte, 1 = short, 2 = long) */ 594 16, /* bitsize */ 595 FALSE, /* pc_relative */ 596 0, /* bitpos */ 597 complain_overflow_bitfield, /* complain_on_overflow */ 598 bfd_elf_generic_reloc, /* special_function */ 599 "R_PPC_UADDR16", /* name */ 600 FALSE, /* partial_inplace */ 601 0, /* src_mask */ 602 0xffff, /* dst_mask */ 603 FALSE), /* pcrel_offset */ 604 605 /* 32-bit PC relative */ 606 HOWTO (R_PPC_REL32, /* type */ 607 0, /* rightshift */ 608 2, /* size (0 = byte, 1 = short, 2 = long) */ 609 32, /* bitsize */ 610 TRUE, /* pc_relative */ 611 0, /* bitpos */ 612 complain_overflow_bitfield, /* complain_on_overflow */ 613 bfd_elf_generic_reloc, /* special_function */ 614 "R_PPC_REL32", /* name */ 615 FALSE, /* partial_inplace */ 616 0, /* src_mask */ 617 0xffffffff, /* dst_mask */ 618 TRUE), /* pcrel_offset */ 619 620 /* 32-bit relocation to the symbol's procedure linkage table. 621 FIXME: not supported. */ 622 HOWTO (R_PPC_PLT32, /* type */ 623 0, /* rightshift */ 624 2, /* size (0 = byte, 1 = short, 2 = long) */ 625 32, /* bitsize */ 626 FALSE, /* pc_relative */ 627 0, /* bitpos */ 628 complain_overflow_bitfield, /* complain_on_overflow */ 629 bfd_elf_generic_reloc, /* special_function */ 630 "R_PPC_PLT32", /* name */ 631 FALSE, /* partial_inplace */ 632 0, /* src_mask */ 633 0, /* dst_mask */ 634 FALSE), /* pcrel_offset */ 635 636 /* 32-bit PC relative relocation to the symbol's procedure linkage table. 637 FIXME: not supported. */ 638 HOWTO (R_PPC_PLTREL32, /* type */ 639 0, /* rightshift */ 640 2, /* size (0 = byte, 1 = short, 2 = long) */ 641 32, /* bitsize */ 642 TRUE, /* pc_relative */ 643 0, /* bitpos */ 644 complain_overflow_bitfield, /* complain_on_overflow */ 645 bfd_elf_generic_reloc, /* special_function */ 646 "R_PPC_PLTREL32", /* name */ 647 FALSE, /* partial_inplace */ 648 0, /* src_mask */ 649 0, /* dst_mask */ 650 TRUE), /* pcrel_offset */ 651 652 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for 653 the symbol. */ 654 HOWTO (R_PPC_PLT16_LO, /* type */ 655 0, /* rightshift */ 656 1, /* size (0 = byte, 1 = short, 2 = long) */ 657 16, /* bitsize */ 658 FALSE, /* pc_relative */ 659 0, /* bitpos */ 660 complain_overflow_dont, /* complain_on_overflow */ 661 bfd_elf_generic_reloc, /* special_function */ 662 "R_PPC_PLT16_LO", /* name */ 663 FALSE, /* partial_inplace */ 664 0, /* src_mask */ 665 0xffff, /* dst_mask */ 666 FALSE), /* pcrel_offset */ 667 668 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for 669 the symbol. */ 670 HOWTO (R_PPC_PLT16_HI, /* type */ 671 16, /* rightshift */ 672 1, /* size (0 = byte, 1 = short, 2 = long) */ 673 16, /* bitsize */ 674 FALSE, /* pc_relative */ 675 0, /* bitpos */ 676 complain_overflow_bitfield, /* complain_on_overflow */ 677 bfd_elf_generic_reloc, /* special_function */ 678 "R_PPC_PLT16_HI", /* name */ 679 FALSE, /* partial_inplace */ 680 0, /* src_mask */ 681 0xffff, /* dst_mask */ 682 FALSE), /* pcrel_offset */ 683 684 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for 685 the symbol. */ 686 HOWTO (R_PPC_PLT16_HA, /* type */ 687 16, /* rightshift */ 688 1, /* size (0 = byte, 1 = short, 2 = long) */ 689 16, /* bitsize */ 690 FALSE, /* pc_relative */ 691 0, /* bitpos */ 692 complain_overflow_bitfield, /* complain_on_overflow */ 693 ppc_elf_addr16_ha_reloc, /* special_function */ 694 "R_PPC_PLT16_HA", /* name */ 695 FALSE, /* partial_inplace */ 696 0, /* src_mask */ 697 0xffff, /* dst_mask */ 698 FALSE), /* pcrel_offset */ 699 700 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with 701 small data items. */ 702 HOWTO (R_PPC_SDAREL16, /* type */ 703 0, /* rightshift */ 704 1, /* size (0 = byte, 1 = short, 2 = long) */ 705 16, /* bitsize */ 706 FALSE, /* pc_relative */ 707 0, /* bitpos */ 708 complain_overflow_signed, /* complain_on_overflow */ 709 bfd_elf_generic_reloc, /* special_function */ 710 "R_PPC_SDAREL16", /* name */ 711 FALSE, /* partial_inplace */ 712 0, /* src_mask */ 713 0xffff, /* dst_mask */ 714 FALSE), /* pcrel_offset */ 715 716 /* 16-bit section relative relocation. */ 717 HOWTO (R_PPC_SECTOFF, /* type */ 718 0, /* rightshift */ 719 1, /* size (0 = byte, 1 = short, 2 = long) */ 720 16, /* bitsize */ 721 FALSE, /* pc_relative */ 722 0, /* bitpos */ 723 complain_overflow_bitfield, /* complain_on_overflow */ 724 bfd_elf_generic_reloc, /* special_function */ 725 "R_PPC_SECTOFF", /* name */ 726 FALSE, /* partial_inplace */ 727 0, /* src_mask */ 728 0xffff, /* dst_mask */ 729 FALSE), /* pcrel_offset */ 730 731 /* 16-bit lower half section relative relocation. */ 732 HOWTO (R_PPC_SECTOFF_LO, /* type */ 733 0, /* rightshift */ 734 1, /* size (0 = byte, 1 = short, 2 = long) */ 735 16, /* bitsize */ 736 FALSE, /* pc_relative */ 737 0, /* bitpos */ 738 complain_overflow_dont, /* complain_on_overflow */ 739 bfd_elf_generic_reloc, /* special_function */ 740 "R_PPC_SECTOFF_LO", /* name */ 741 FALSE, /* partial_inplace */ 742 0, /* src_mask */ 743 0xffff, /* dst_mask */ 744 FALSE), /* pcrel_offset */ 745 746 /* 16-bit upper half section relative relocation. */ 747 HOWTO (R_PPC_SECTOFF_HI, /* type */ 748 16, /* rightshift */ 749 1, /* size (0 = byte, 1 = short, 2 = long) */ 750 16, /* bitsize */ 751 FALSE, /* pc_relative */ 752 0, /* bitpos */ 753 complain_overflow_bitfield, /* complain_on_overflow */ 754 bfd_elf_generic_reloc, /* special_function */ 755 "R_PPC_SECTOFF_HI", /* name */ 756 FALSE, /* partial_inplace */ 757 0, /* src_mask */ 758 0xffff, /* dst_mask */ 759 FALSE), /* pcrel_offset */ 760 761 /* 16-bit upper half adjusted section relative relocation. */ 762 HOWTO (R_PPC_SECTOFF_HA, /* type */ 763 16, /* rightshift */ 764 1, /* size (0 = byte, 1 = short, 2 = long) */ 765 16, /* bitsize */ 766 FALSE, /* pc_relative */ 767 0, /* bitpos */ 768 complain_overflow_bitfield, /* complain_on_overflow */ 769 ppc_elf_addr16_ha_reloc, /* special_function */ 770 "R_PPC_SECTOFF_HA", /* name */ 771 FALSE, /* partial_inplace */ 772 0, /* src_mask */ 773 0xffff, /* dst_mask */ 774 FALSE), /* pcrel_offset */ 775 776 /* Marker relocs for TLS. */ 777 HOWTO (R_PPC_TLS, 778 0, /* rightshift */ 779 2, /* size (0 = byte, 1 = short, 2 = long) */ 780 32, /* bitsize */ 781 FALSE, /* pc_relative */ 782 0, /* bitpos */ 783 complain_overflow_dont, /* complain_on_overflow */ 784 bfd_elf_generic_reloc, /* special_function */ 785 "R_PPC_TLS", /* name */ 786 FALSE, /* partial_inplace */ 787 0, /* src_mask */ 788 0, /* dst_mask */ 789 FALSE), /* pcrel_offset */ 790 791 HOWTO (R_PPC_TLSGD, 792 0, /* rightshift */ 793 2, /* size (0 = byte, 1 = short, 2 = long) */ 794 32, /* bitsize */ 795 FALSE, /* pc_relative */ 796 0, /* bitpos */ 797 complain_overflow_dont, /* complain_on_overflow */ 798 bfd_elf_generic_reloc, /* special_function */ 799 "R_PPC_TLSGD", /* name */ 800 FALSE, /* partial_inplace */ 801 0, /* src_mask */ 802 0, /* dst_mask */ 803 FALSE), /* pcrel_offset */ 804 805 HOWTO (R_PPC_TLSLD, 806 0, /* rightshift */ 807 2, /* size (0 = byte, 1 = short, 2 = long) */ 808 32, /* bitsize */ 809 FALSE, /* pc_relative */ 810 0, /* bitpos */ 811 complain_overflow_dont, /* complain_on_overflow */ 812 bfd_elf_generic_reloc, /* special_function */ 813 "R_PPC_TLSLD", /* name */ 814 FALSE, /* partial_inplace */ 815 0, /* src_mask */ 816 0, /* dst_mask */ 817 FALSE), /* pcrel_offset */ 818 819 /* Computes the load module index of the load module that contains the 820 definition of its TLS sym. */ 821 HOWTO (R_PPC_DTPMOD32, 822 0, /* rightshift */ 823 2, /* size (0 = byte, 1 = short, 2 = long) */ 824 32, /* bitsize */ 825 FALSE, /* pc_relative */ 826 0, /* bitpos */ 827 complain_overflow_dont, /* complain_on_overflow */ 828 ppc_elf_unhandled_reloc, /* special_function */ 829 "R_PPC_DTPMOD32", /* name */ 830 FALSE, /* partial_inplace */ 831 0, /* src_mask */ 832 0xffffffff, /* dst_mask */ 833 FALSE), /* pcrel_offset */ 834 835 /* Computes a dtv-relative displacement, the difference between the value 836 of sym+add and the base address of the thread-local storage block that 837 contains the definition of sym, minus 0x8000. */ 838 HOWTO (R_PPC_DTPREL32, 839 0, /* rightshift */ 840 2, /* size (0 = byte, 1 = short, 2 = long) */ 841 32, /* bitsize */ 842 FALSE, /* pc_relative */ 843 0, /* bitpos */ 844 complain_overflow_dont, /* complain_on_overflow */ 845 ppc_elf_unhandled_reloc, /* special_function */ 846 "R_PPC_DTPREL32", /* name */ 847 FALSE, /* partial_inplace */ 848 0, /* src_mask */ 849 0xffffffff, /* dst_mask */ 850 FALSE), /* pcrel_offset */ 851 852 /* A 16 bit dtprel reloc. */ 853 HOWTO (R_PPC_DTPREL16, 854 0, /* rightshift */ 855 1, /* size (0 = byte, 1 = short, 2 = long) */ 856 16, /* bitsize */ 857 FALSE, /* pc_relative */ 858 0, /* bitpos */ 859 complain_overflow_signed, /* complain_on_overflow */ 860 ppc_elf_unhandled_reloc, /* special_function */ 861 "R_PPC_DTPREL16", /* name */ 862 FALSE, /* partial_inplace */ 863 0, /* src_mask */ 864 0xffff, /* dst_mask */ 865 FALSE), /* pcrel_offset */ 866 867 /* Like DTPREL16, but no overflow. */ 868 HOWTO (R_PPC_DTPREL16_LO, 869 0, /* rightshift */ 870 1, /* size (0 = byte, 1 = short, 2 = long) */ 871 16, /* bitsize */ 872 FALSE, /* pc_relative */ 873 0, /* bitpos */ 874 complain_overflow_dont, /* complain_on_overflow */ 875 ppc_elf_unhandled_reloc, /* special_function */ 876 "R_PPC_DTPREL16_LO", /* name */ 877 FALSE, /* partial_inplace */ 878 0, /* src_mask */ 879 0xffff, /* dst_mask */ 880 FALSE), /* pcrel_offset */ 881 882 /* Like DTPREL16_LO, but next higher group of 16 bits. */ 883 HOWTO (R_PPC_DTPREL16_HI, 884 16, /* rightshift */ 885 1, /* size (0 = byte, 1 = short, 2 = long) */ 886 16, /* bitsize */ 887 FALSE, /* pc_relative */ 888 0, /* bitpos */ 889 complain_overflow_dont, /* complain_on_overflow */ 890 ppc_elf_unhandled_reloc, /* special_function */ 891 "R_PPC_DTPREL16_HI", /* name */ 892 FALSE, /* partial_inplace */ 893 0, /* src_mask */ 894 0xffff, /* dst_mask */ 895 FALSE), /* pcrel_offset */ 896 897 /* Like DTPREL16_HI, but adjust for low 16 bits. */ 898 HOWTO (R_PPC_DTPREL16_HA, 899 16, /* rightshift */ 900 1, /* size (0 = byte, 1 = short, 2 = long) */ 901 16, /* bitsize */ 902 FALSE, /* pc_relative */ 903 0, /* bitpos */ 904 complain_overflow_dont, /* complain_on_overflow */ 905 ppc_elf_unhandled_reloc, /* special_function */ 906 "R_PPC_DTPREL16_HA", /* name */ 907 FALSE, /* partial_inplace */ 908 0, /* src_mask */ 909 0xffff, /* dst_mask */ 910 FALSE), /* pcrel_offset */ 911 912 /* Computes a tp-relative displacement, the difference between the value of 913 sym+add and the value of the thread pointer (r13). */ 914 HOWTO (R_PPC_TPREL32, 915 0, /* rightshift */ 916 2, /* size (0 = byte, 1 = short, 2 = long) */ 917 32, /* bitsize */ 918 FALSE, /* pc_relative */ 919 0, /* bitpos */ 920 complain_overflow_dont, /* complain_on_overflow */ 921 ppc_elf_unhandled_reloc, /* special_function */ 922 "R_PPC_TPREL32", /* name */ 923 FALSE, /* partial_inplace */ 924 0, /* src_mask */ 925 0xffffffff, /* dst_mask */ 926 FALSE), /* pcrel_offset */ 927 928 /* A 16 bit tprel reloc. */ 929 HOWTO (R_PPC_TPREL16, 930 0, /* rightshift */ 931 1, /* size (0 = byte, 1 = short, 2 = long) */ 932 16, /* bitsize */ 933 FALSE, /* pc_relative */ 934 0, /* bitpos */ 935 complain_overflow_signed, /* complain_on_overflow */ 936 ppc_elf_unhandled_reloc, /* special_function */ 937 "R_PPC_TPREL16", /* name */ 938 FALSE, /* partial_inplace */ 939 0, /* src_mask */ 940 0xffff, /* dst_mask */ 941 FALSE), /* pcrel_offset */ 942 943 /* Like TPREL16, but no overflow. */ 944 HOWTO (R_PPC_TPREL16_LO, 945 0, /* rightshift */ 946 1, /* size (0 = byte, 1 = short, 2 = long) */ 947 16, /* bitsize */ 948 FALSE, /* pc_relative */ 949 0, /* bitpos */ 950 complain_overflow_dont, /* complain_on_overflow */ 951 ppc_elf_unhandled_reloc, /* special_function */ 952 "R_PPC_TPREL16_LO", /* name */ 953 FALSE, /* partial_inplace */ 954 0, /* src_mask */ 955 0xffff, /* dst_mask */ 956 FALSE), /* pcrel_offset */ 957 958 /* Like TPREL16_LO, but next higher group of 16 bits. */ 959 HOWTO (R_PPC_TPREL16_HI, 960 16, /* rightshift */ 961 1, /* size (0 = byte, 1 = short, 2 = long) */ 962 16, /* bitsize */ 963 FALSE, /* pc_relative */ 964 0, /* bitpos */ 965 complain_overflow_dont, /* complain_on_overflow */ 966 ppc_elf_unhandled_reloc, /* special_function */ 967 "R_PPC_TPREL16_HI", /* name */ 968 FALSE, /* partial_inplace */ 969 0, /* src_mask */ 970 0xffff, /* dst_mask */ 971 FALSE), /* pcrel_offset */ 972 973 /* Like TPREL16_HI, but adjust for low 16 bits. */ 974 HOWTO (R_PPC_TPREL16_HA, 975 16, /* rightshift */ 976 1, /* size (0 = byte, 1 = short, 2 = long) */ 977 16, /* bitsize */ 978 FALSE, /* pc_relative */ 979 0, /* bitpos */ 980 complain_overflow_dont, /* complain_on_overflow */ 981 ppc_elf_unhandled_reloc, /* special_function */ 982 "R_PPC_TPREL16_HA", /* name */ 983 FALSE, /* partial_inplace */ 984 0, /* src_mask */ 985 0xffff, /* dst_mask */ 986 FALSE), /* pcrel_offset */ 987 988 /* Allocates two contiguous entries in the GOT to hold a tls_index structure, 989 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset 990 to the first entry. */ 991 HOWTO (R_PPC_GOT_TLSGD16, 992 0, /* rightshift */ 993 1, /* size (0 = byte, 1 = short, 2 = long) */ 994 16, /* bitsize */ 995 FALSE, /* pc_relative */ 996 0, /* bitpos */ 997 complain_overflow_signed, /* complain_on_overflow */ 998 ppc_elf_unhandled_reloc, /* special_function */ 999 "R_PPC_GOT_TLSGD16", /* name */ 1000 FALSE, /* partial_inplace */ 1001 0, /* src_mask */ 1002 0xffff, /* dst_mask */ 1003 FALSE), /* pcrel_offset */ 1004 1005 /* Like GOT_TLSGD16, but no overflow. */ 1006 HOWTO (R_PPC_GOT_TLSGD16_LO, 1007 0, /* rightshift */ 1008 1, /* size (0 = byte, 1 = short, 2 = long) */ 1009 16, /* bitsize */ 1010 FALSE, /* pc_relative */ 1011 0, /* bitpos */ 1012 complain_overflow_dont, /* complain_on_overflow */ 1013 ppc_elf_unhandled_reloc, /* special_function */ 1014 "R_PPC_GOT_TLSGD16_LO", /* name */ 1015 FALSE, /* partial_inplace */ 1016 0, /* src_mask */ 1017 0xffff, /* dst_mask */ 1018 FALSE), /* pcrel_offset */ 1019 1020 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */ 1021 HOWTO (R_PPC_GOT_TLSGD16_HI, 1022 16, /* rightshift */ 1023 1, /* size (0 = byte, 1 = short, 2 = long) */ 1024 16, /* bitsize */ 1025 FALSE, /* pc_relative */ 1026 0, /* bitpos */ 1027 complain_overflow_dont, /* complain_on_overflow */ 1028 ppc_elf_unhandled_reloc, /* special_function */ 1029 "R_PPC_GOT_TLSGD16_HI", /* name */ 1030 FALSE, /* partial_inplace */ 1031 0, /* src_mask */ 1032 0xffff, /* dst_mask */ 1033 FALSE), /* pcrel_offset */ 1034 1035 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */ 1036 HOWTO (R_PPC_GOT_TLSGD16_HA, 1037 16, /* rightshift */ 1038 1, /* size (0 = byte, 1 = short, 2 = long) */ 1039 16, /* bitsize */ 1040 FALSE, /* pc_relative */ 1041 0, /* bitpos */ 1042 complain_overflow_dont, /* complain_on_overflow */ 1043 ppc_elf_unhandled_reloc, /* special_function */ 1044 "R_PPC_GOT_TLSGD16_HA", /* name */ 1045 FALSE, /* partial_inplace */ 1046 0, /* src_mask */ 1047 0xffff, /* dst_mask */ 1048 FALSE), /* pcrel_offset */ 1049 1050 /* Allocates two contiguous entries in the GOT to hold a tls_index structure, 1051 with values (sym+add)@dtpmod and zero, and computes the offset to the 1052 first entry. */ 1053 HOWTO (R_PPC_GOT_TLSLD16, 1054 0, /* rightshift */ 1055 1, /* size (0 = byte, 1 = short, 2 = long) */ 1056 16, /* bitsize */ 1057 FALSE, /* pc_relative */ 1058 0, /* bitpos */ 1059 complain_overflow_signed, /* complain_on_overflow */ 1060 ppc_elf_unhandled_reloc, /* special_function */ 1061 "R_PPC_GOT_TLSLD16", /* name */ 1062 FALSE, /* partial_inplace */ 1063 0, /* src_mask */ 1064 0xffff, /* dst_mask */ 1065 FALSE), /* pcrel_offset */ 1066 1067 /* Like GOT_TLSLD16, but no overflow. */ 1068 HOWTO (R_PPC_GOT_TLSLD16_LO, 1069 0, /* rightshift */ 1070 1, /* size (0 = byte, 1 = short, 2 = long) */ 1071 16, /* bitsize */ 1072 FALSE, /* pc_relative */ 1073 0, /* bitpos */ 1074 complain_overflow_dont, /* complain_on_overflow */ 1075 ppc_elf_unhandled_reloc, /* special_function */ 1076 "R_PPC_GOT_TLSLD16_LO", /* name */ 1077 FALSE, /* partial_inplace */ 1078 0, /* src_mask */ 1079 0xffff, /* dst_mask */ 1080 FALSE), /* pcrel_offset */ 1081 1082 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */ 1083 HOWTO (R_PPC_GOT_TLSLD16_HI, 1084 16, /* rightshift */ 1085 1, /* size (0 = byte, 1 = short, 2 = long) */ 1086 16, /* bitsize */ 1087 FALSE, /* pc_relative */ 1088 0, /* bitpos */ 1089 complain_overflow_dont, /* complain_on_overflow */ 1090 ppc_elf_unhandled_reloc, /* special_function */ 1091 "R_PPC_GOT_TLSLD16_HI", /* name */ 1092 FALSE, /* partial_inplace */ 1093 0, /* src_mask */ 1094 0xffff, /* dst_mask */ 1095 FALSE), /* pcrel_offset */ 1096 1097 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */ 1098 HOWTO (R_PPC_GOT_TLSLD16_HA, 1099 16, /* rightshift */ 1100 1, /* size (0 = byte, 1 = short, 2 = long) */ 1101 16, /* bitsize */ 1102 FALSE, /* pc_relative */ 1103 0, /* bitpos */ 1104 complain_overflow_dont, /* complain_on_overflow */ 1105 ppc_elf_unhandled_reloc, /* special_function */ 1106 "R_PPC_GOT_TLSLD16_HA", /* name */ 1107 FALSE, /* partial_inplace */ 1108 0, /* src_mask */ 1109 0xffff, /* dst_mask */ 1110 FALSE), /* pcrel_offset */ 1111 1112 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes 1113 the offset to the entry. */ 1114 HOWTO (R_PPC_GOT_DTPREL16, 1115 0, /* rightshift */ 1116 1, /* size (0 = byte, 1 = short, 2 = long) */ 1117 16, /* bitsize */ 1118 FALSE, /* pc_relative */ 1119 0, /* bitpos */ 1120 complain_overflow_signed, /* complain_on_overflow */ 1121 ppc_elf_unhandled_reloc, /* special_function */ 1122 "R_PPC_GOT_DTPREL16", /* name */ 1123 FALSE, /* partial_inplace */ 1124 0, /* src_mask */ 1125 0xffff, /* dst_mask */ 1126 FALSE), /* pcrel_offset */ 1127 1128 /* Like GOT_DTPREL16, but no overflow. */ 1129 HOWTO (R_PPC_GOT_DTPREL16_LO, 1130 0, /* rightshift */ 1131 1, /* size (0 = byte, 1 = short, 2 = long) */ 1132 16, /* bitsize */ 1133 FALSE, /* pc_relative */ 1134 0, /* bitpos */ 1135 complain_overflow_dont, /* complain_on_overflow */ 1136 ppc_elf_unhandled_reloc, /* special_function */ 1137 "R_PPC_GOT_DTPREL16_LO", /* name */ 1138 FALSE, /* partial_inplace */ 1139 0, /* src_mask */ 1140 0xffff, /* dst_mask */ 1141 FALSE), /* pcrel_offset */ 1142 1143 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */ 1144 HOWTO (R_PPC_GOT_DTPREL16_HI, 1145 16, /* rightshift */ 1146 1, /* size (0 = byte, 1 = short, 2 = long) */ 1147 16, /* bitsize */ 1148 FALSE, /* pc_relative */ 1149 0, /* bitpos */ 1150 complain_overflow_dont, /* complain_on_overflow */ 1151 ppc_elf_unhandled_reloc, /* special_function */ 1152 "R_PPC_GOT_DTPREL16_HI", /* name */ 1153 FALSE, /* partial_inplace */ 1154 0, /* src_mask */ 1155 0xffff, /* dst_mask */ 1156 FALSE), /* pcrel_offset */ 1157 1158 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */ 1159 HOWTO (R_PPC_GOT_DTPREL16_HA, 1160 16, /* rightshift */ 1161 1, /* size (0 = byte, 1 = short, 2 = long) */ 1162 16, /* bitsize */ 1163 FALSE, /* pc_relative */ 1164 0, /* bitpos */ 1165 complain_overflow_dont, /* complain_on_overflow */ 1166 ppc_elf_unhandled_reloc, /* special_function */ 1167 "R_PPC_GOT_DTPREL16_HA", /* name */ 1168 FALSE, /* partial_inplace */ 1169 0, /* src_mask */ 1170 0xffff, /* dst_mask */ 1171 FALSE), /* pcrel_offset */ 1172 1173 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the 1174 offset to the entry. */ 1175 HOWTO (R_PPC_GOT_TPREL16, 1176 0, /* rightshift */ 1177 1, /* size (0 = byte, 1 = short, 2 = long) */ 1178 16, /* bitsize */ 1179 FALSE, /* pc_relative */ 1180 0, /* bitpos */ 1181 complain_overflow_signed, /* complain_on_overflow */ 1182 ppc_elf_unhandled_reloc, /* special_function */ 1183 "R_PPC_GOT_TPREL16", /* name */ 1184 FALSE, /* partial_inplace */ 1185 0, /* src_mask */ 1186 0xffff, /* dst_mask */ 1187 FALSE), /* pcrel_offset */ 1188 1189 /* Like GOT_TPREL16, but no overflow. */ 1190 HOWTO (R_PPC_GOT_TPREL16_LO, 1191 0, /* rightshift */ 1192 1, /* size (0 = byte, 1 = short, 2 = long) */ 1193 16, /* bitsize */ 1194 FALSE, /* pc_relative */ 1195 0, /* bitpos */ 1196 complain_overflow_dont, /* complain_on_overflow */ 1197 ppc_elf_unhandled_reloc, /* special_function */ 1198 "R_PPC_GOT_TPREL16_LO", /* name */ 1199 FALSE, /* partial_inplace */ 1200 0, /* src_mask */ 1201 0xffff, /* dst_mask */ 1202 FALSE), /* pcrel_offset */ 1203 1204 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */ 1205 HOWTO (R_PPC_GOT_TPREL16_HI, 1206 16, /* rightshift */ 1207 1, /* size (0 = byte, 1 = short, 2 = long) */ 1208 16, /* bitsize */ 1209 FALSE, /* pc_relative */ 1210 0, /* bitpos */ 1211 complain_overflow_dont, /* complain_on_overflow */ 1212 ppc_elf_unhandled_reloc, /* special_function */ 1213 "R_PPC_GOT_TPREL16_HI", /* name */ 1214 FALSE, /* partial_inplace */ 1215 0, /* src_mask */ 1216 0xffff, /* dst_mask */ 1217 FALSE), /* pcrel_offset */ 1218 1219 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */ 1220 HOWTO (R_PPC_GOT_TPREL16_HA, 1221 16, /* rightshift */ 1222 1, /* size (0 = byte, 1 = short, 2 = long) */ 1223 16, /* bitsize */ 1224 FALSE, /* pc_relative */ 1225 0, /* bitpos */ 1226 complain_overflow_dont, /* complain_on_overflow */ 1227 ppc_elf_unhandled_reloc, /* special_function */ 1228 "R_PPC_GOT_TPREL16_HA", /* name */ 1229 FALSE, /* partial_inplace */ 1230 0, /* src_mask */ 1231 0xffff, /* dst_mask */ 1232 FALSE), /* pcrel_offset */ 1233 1234 /* The remaining relocs are from the Embedded ELF ABI, and are not 1235 in the SVR4 ELF ABI. */ 1236 1237 /* 32 bit value resulting from the addend minus the symbol. */ 1238 HOWTO (R_PPC_EMB_NADDR32, /* type */ 1239 0, /* rightshift */ 1240 2, /* size (0 = byte, 1 = short, 2 = long) */ 1241 32, /* bitsize */ 1242 FALSE, /* pc_relative */ 1243 0, /* bitpos */ 1244 complain_overflow_bitfield, /* complain_on_overflow */ 1245 bfd_elf_generic_reloc, /* special_function */ 1246 "R_PPC_EMB_NADDR32", /* name */ 1247 FALSE, /* partial_inplace */ 1248 0, /* src_mask */ 1249 0xffffffff, /* dst_mask */ 1250 FALSE), /* pcrel_offset */ 1251 1252 /* 16 bit value resulting from the addend minus the symbol. */ 1253 HOWTO (R_PPC_EMB_NADDR16, /* type */ 1254 0, /* rightshift */ 1255 1, /* size (0 = byte, 1 = short, 2 = long) */ 1256 16, /* bitsize */ 1257 FALSE, /* pc_relative */ 1258 0, /* bitpos */ 1259 complain_overflow_bitfield, /* complain_on_overflow */ 1260 bfd_elf_generic_reloc, /* special_function */ 1261 "R_PPC_EMB_NADDR16", /* name */ 1262 FALSE, /* partial_inplace */ 1263 0, /* src_mask */ 1264 0xffff, /* dst_mask */ 1265 FALSE), /* pcrel_offset */ 1266 1267 /* 16 bit value resulting from the addend minus the symbol. */ 1268 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */ 1269 0, /* rightshift */ 1270 1, /* size (0 = byte, 1 = short, 2 = long) */ 1271 16, /* bitsize */ 1272 FALSE, /* pc_relative */ 1273 0, /* bitpos */ 1274 complain_overflow_dont,/* complain_on_overflow */ 1275 bfd_elf_generic_reloc, /* special_function */ 1276 "R_PPC_EMB_ADDR16_LO", /* name */ 1277 FALSE, /* partial_inplace */ 1278 0, /* src_mask */ 1279 0xffff, /* dst_mask */ 1280 FALSE), /* pcrel_offset */ 1281 1282 /* The high order 16 bits of the addend minus the symbol. */ 1283 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */ 1284 16, /* rightshift */ 1285 1, /* size (0 = byte, 1 = short, 2 = long) */ 1286 16, /* bitsize */ 1287 FALSE, /* pc_relative */ 1288 0, /* bitpos */ 1289 complain_overflow_dont, /* complain_on_overflow */ 1290 bfd_elf_generic_reloc, /* special_function */ 1291 "R_PPC_EMB_NADDR16_HI", /* name */ 1292 FALSE, /* partial_inplace */ 1293 0, /* src_mask */ 1294 0xffff, /* dst_mask */ 1295 FALSE), /* pcrel_offset */ 1296 1297 /* The high order 16 bits of the result of the addend minus the address, 1298 plus 1 if the contents of the low 16 bits, treated as a signed number, 1299 is negative. */ 1300 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */ 1301 16, /* rightshift */ 1302 1, /* size (0 = byte, 1 = short, 2 = long) */ 1303 16, /* bitsize */ 1304 FALSE, /* pc_relative */ 1305 0, /* bitpos */ 1306 complain_overflow_dont, /* complain_on_overflow */ 1307 ppc_elf_addr16_ha_reloc, /* special_function */ 1308 "R_PPC_EMB_NADDR16_HA", /* name */ 1309 FALSE, /* partial_inplace */ 1310 0, /* src_mask */ 1311 0xffff, /* dst_mask */ 1312 FALSE), /* pcrel_offset */ 1313 1314 /* 16 bit value resulting from allocating a 4 byte word to hold an 1315 address in the .sdata section, and returning the offset from 1316 _SDA_BASE_ for that relocation. */ 1317 HOWTO (R_PPC_EMB_SDAI16, /* type */ 1318 0, /* rightshift */ 1319 1, /* size (0 = byte, 1 = short, 2 = long) */ 1320 16, /* bitsize */ 1321 FALSE, /* pc_relative */ 1322 0, /* bitpos */ 1323 complain_overflow_signed, /* complain_on_overflow */ 1324 bfd_elf_generic_reloc, /* special_function */ 1325 "R_PPC_EMB_SDAI16", /* name */ 1326 FALSE, /* partial_inplace */ 1327 0, /* src_mask */ 1328 0xffff, /* dst_mask */ 1329 FALSE), /* pcrel_offset */ 1330 1331 /* 16 bit value resulting from allocating a 4 byte word to hold an 1332 address in the .sdata2 section, and returning the offset from 1333 _SDA2_BASE_ for that relocation. */ 1334 HOWTO (R_PPC_EMB_SDA2I16, /* type */ 1335 0, /* rightshift */ 1336 1, /* size (0 = byte, 1 = short, 2 = long) */ 1337 16, /* bitsize */ 1338 FALSE, /* pc_relative */ 1339 0, /* bitpos */ 1340 complain_overflow_signed, /* complain_on_overflow */ 1341 bfd_elf_generic_reloc, /* special_function */ 1342 "R_PPC_EMB_SDA2I16", /* name */ 1343 FALSE, /* partial_inplace */ 1344 0, /* src_mask */ 1345 0xffff, /* dst_mask */ 1346 FALSE), /* pcrel_offset */ 1347 1348 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with 1349 small data items. */ 1350 HOWTO (R_PPC_EMB_SDA2REL, /* type */ 1351 0, /* rightshift */ 1352 1, /* size (0 = byte, 1 = short, 2 = long) */ 1353 16, /* bitsize */ 1354 FALSE, /* pc_relative */ 1355 0, /* bitpos */ 1356 complain_overflow_signed, /* complain_on_overflow */ 1357 bfd_elf_generic_reloc, /* special_function */ 1358 "R_PPC_EMB_SDA2REL", /* name */ 1359 FALSE, /* partial_inplace */ 1360 0, /* src_mask */ 1361 0xffff, /* dst_mask */ 1362 FALSE), /* pcrel_offset */ 1363 1364 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit 1365 signed offset from the appropriate base, and filling in the register 1366 field with the appropriate register (0, 2, or 13). */ 1367 HOWTO (R_PPC_EMB_SDA21, /* type */ 1368 0, /* rightshift */ 1369 2, /* size (0 = byte, 1 = short, 2 = long) */ 1370 16, /* bitsize */ 1371 FALSE, /* pc_relative */ 1372 0, /* bitpos */ 1373 complain_overflow_signed, /* complain_on_overflow */ 1374 bfd_elf_generic_reloc, /* special_function */ 1375 "R_PPC_EMB_SDA21", /* name */ 1376 FALSE, /* partial_inplace */ 1377 0, /* src_mask */ 1378 0xffff, /* dst_mask */ 1379 FALSE), /* pcrel_offset */ 1380 1381 /* Relocation not handled: R_PPC_EMB_MRKREF */ 1382 /* Relocation not handled: R_PPC_EMB_RELSEC16 */ 1383 /* Relocation not handled: R_PPC_EMB_RELST_LO */ 1384 /* Relocation not handled: R_PPC_EMB_RELST_HI */ 1385 /* Relocation not handled: R_PPC_EMB_RELST_HA */ 1386 /* Relocation not handled: R_PPC_EMB_BIT_FLD */ 1387 1388 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling 1389 in the 16 bit signed offset from the appropriate base, and filling in the 1390 register field with the appropriate register (0, 2, or 13). */ 1391 HOWTO (R_PPC_EMB_RELSDA, /* type */ 1392 0, /* rightshift */ 1393 1, /* size (0 = byte, 1 = short, 2 = long) */ 1394 16, /* bitsize */ 1395 FALSE, /* pc_relative */ 1396 0, /* bitpos */ 1397 complain_overflow_signed, /* complain_on_overflow */ 1398 bfd_elf_generic_reloc, /* special_function */ 1399 "R_PPC_EMB_RELSDA", /* name */ 1400 FALSE, /* partial_inplace */ 1401 0, /* src_mask */ 1402 0xffff, /* dst_mask */ 1403 FALSE), /* pcrel_offset */ 1404 1405 /* A relative 8 bit branch. */ 1406 HOWTO (R_PPC_VLE_REL8, /* type */ 1407 1, /* rightshift */ 1408 1, /* size (0 = byte, 1 = short, 2 = long) */ 1409 8, /* bitsize */ 1410 TRUE, /* pc_relative */ 1411 0, /* bitpos */ 1412 complain_overflow_signed, /* complain_on_overflow */ 1413 bfd_elf_generic_reloc, /* special_function */ 1414 "R_PPC_VLE_REL8", /* name */ 1415 FALSE, /* partial_inplace */ 1416 0, /* src_mask */ 1417 0xff, /* dst_mask */ 1418 TRUE), /* pcrel_offset */ 1419 1420 /* A relative 15 bit branch. */ 1421 HOWTO (R_PPC_VLE_REL15, /* type */ 1422 1, /* rightshift */ 1423 2, /* size (0 = byte, 1 = short, 2 = long) */ 1424 15, /* bitsize */ 1425 TRUE, /* pc_relative */ 1426 1, /* bitpos */ 1427 complain_overflow_signed, /* complain_on_overflow */ 1428 bfd_elf_generic_reloc, /* special_function */ 1429 "R_PPC_VLE_REL15", /* name */ 1430 FALSE, /* partial_inplace */ 1431 0, /* src_mask */ 1432 0xfe, /* dst_mask */ 1433 TRUE), /* pcrel_offset */ 1434 1435 /* A relative 24 bit branch. */ 1436 HOWTO (R_PPC_VLE_REL24, /* type */ 1437 1, /* rightshift */ 1438 2, /* size (0 = byte, 1 = short, 2 = long) */ 1439 24, /* bitsize */ 1440 TRUE, /* pc_relative */ 1441 1, /* bitpos */ 1442 complain_overflow_signed, /* complain_on_overflow */ 1443 bfd_elf_generic_reloc, /* special_function */ 1444 "R_PPC_VLE_REL24", /* name */ 1445 FALSE, /* partial_inplace */ 1446 0, /* src_mask */ 1447 0x1fffffe, /* dst_mask */ 1448 TRUE), /* pcrel_offset */ 1449 1450 /* The 16 LSBS in split16a format. */ 1451 HOWTO (R_PPC_VLE_LO16A, /* type */ 1452 0, /* rightshift */ 1453 2, /* size (0 = byte, 1 = short, 2 = long) */ 1454 32, /* bitsize */ 1455 FALSE, /* pc_relative */ 1456 0, /* bitpos */ 1457 complain_overflow_bitfield, /* complain_on_overflow */ 1458 bfd_elf_generic_reloc, /* special_function */ 1459 "R_PPC_VLE_LO16A", /* name */ 1460 FALSE, /* partial_inplace */ 1461 0, /* src_mask */ 1462 0x1f007ff, /* dst_mask */ 1463 FALSE), /* pcrel_offset */ 1464 1465 /* The 16 LSBS in split16d format. */ 1466 HOWTO (R_PPC_VLE_LO16D, /* type */ 1467 0, /* rightshift */ 1468 2, /* size (0 = byte, 1 = short, 2 = long) */ 1469 32, /* bitsize */ 1470 FALSE, /* pc_relative */ 1471 0, /* bitpos */ 1472 complain_overflow_bitfield, /* complain_on_overflow */ 1473 bfd_elf_generic_reloc, /* special_function */ 1474 "R_PPC_VLE_LO16D", /* name */ 1475 FALSE, /* partial_inplace */ 1476 0, /* src_mask */ 1477 0x1f07ff, /* dst_mask */ 1478 FALSE), /* pcrel_offset */ 1479 1480 /* Bits 16-31 split16a format. */ 1481 HOWTO (R_PPC_VLE_HI16A, /* type */ 1482 0, /* rightshift */ 1483 2, /* size (0 = byte, 1 = short, 2 = long) */ 1484 32, /* bitsize */ 1485 FALSE, /* pc_relative */ 1486 0, /* bitpos */ 1487 complain_overflow_bitfield, /* complain_on_overflow */ 1488 bfd_elf_generic_reloc, /* special_function */ 1489 "R_PPC_VLE_HI16A", /* name */ 1490 FALSE, /* partial_inplace */ 1491 0, /* src_mask */ 1492 0x1f007ff, /* dst_mask */ 1493 FALSE), /* pcrel_offset */ 1494 1495 /* Bits 16-31 split16d format. */ 1496 HOWTO (R_PPC_VLE_HI16D, /* type */ 1497 0, /* rightshift */ 1498 2, /* size (0 = byte, 1 = short, 2 = long) */ 1499 32, /* bitsize */ 1500 FALSE, /* pc_relative */ 1501 0, /* bitpos */ 1502 complain_overflow_bitfield, /* complain_on_overflow */ 1503 bfd_elf_generic_reloc, /* special_function */ 1504 "R_PPC_VLE_HI16D", /* name */ 1505 FALSE, /* partial_inplace */ 1506 0, /* src_mask */ 1507 0x1f07ff, /* dst_mask */ 1508 FALSE), /* pcrel_offset */ 1509 1510 /* Bits 16-31 (High Adjusted) in split16a format. */ 1511 HOWTO (R_PPC_VLE_HA16A, /* type */ 1512 0, /* rightshift */ 1513 2, /* size (0 = byte, 1 = short, 2 = long) */ 1514 32, /* bitsize */ 1515 FALSE, /* pc_relative */ 1516 0, /* bitpos */ 1517 complain_overflow_bitfield, /* complain_on_overflow */ 1518 bfd_elf_generic_reloc, /* special_function */ 1519 "R_PPC_VLE_HA16A", /* name */ 1520 FALSE, /* partial_inplace */ 1521 0, /* src_mask */ 1522 0x1f007ff, /* dst_mask */ 1523 FALSE), /* pcrel_offset */ 1524 1525 /* Bits 16-31 (High Adjusted) in split16d format. */ 1526 HOWTO (R_PPC_VLE_HA16D, /* type */ 1527 0, /* rightshift */ 1528 2, /* size (0 = byte, 1 = short, 2 = long) */ 1529 32, /* bitsize */ 1530 FALSE, /* pc_relative */ 1531 0, /* bitpos */ 1532 complain_overflow_bitfield, /* complain_on_overflow */ 1533 bfd_elf_generic_reloc, /* special_function */ 1534 "R_PPC_VLE_HA16D", /* name */ 1535 FALSE, /* partial_inplace */ 1536 0, /* src_mask */ 1537 0x1f07ff, /* dst_mask */ 1538 FALSE), /* pcrel_offset */ 1539 1540 /* This reloc does nothing. */ 1541 HOWTO (R_PPC_VLE_SDA21, /* type */ 1542 0, /* rightshift */ 1543 2, /* size (0 = byte, 1 = short, 2 = long) */ 1544 32, /* bitsize */ 1545 FALSE, /* pc_relative */ 1546 0, /* bitpos */ 1547 complain_overflow_bitfield, /* complain_on_overflow */ 1548 bfd_elf_generic_reloc, /* special_function */ 1549 "R_PPC_VLE_SDA21", /* name */ 1550 FALSE, /* partial_inplace */ 1551 0, /* src_mask */ 1552 0xffff, /* dst_mask */ 1553 FALSE), /* pcrel_offset */ 1554 1555 /* This reloc does nothing. */ 1556 HOWTO (R_PPC_VLE_SDA21_LO, /* type */ 1557 0, /* rightshift */ 1558 2, /* size (0 = byte, 1 = short, 2 = long) */ 1559 32, /* bitsize */ 1560 FALSE, /* pc_relative */ 1561 0, /* bitpos */ 1562 complain_overflow_bitfield, /* complain_on_overflow */ 1563 bfd_elf_generic_reloc, /* special_function */ 1564 "R_PPC_VLE_SDA21_LO", /* name */ 1565 FALSE, /* partial_inplace */ 1566 0, /* src_mask */ 1567 0, /* dst_mask */ 1568 FALSE), /* pcrel_offset */ 1569 1570 /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */ 1571 HOWTO (R_PPC_VLE_SDAREL_LO16A,/* type */ 1572 0, /* rightshift */ 1573 2, /* size (0 = byte, 1 = short, 2 = long) */ 1574 32, /* bitsize */ 1575 FALSE, /* pc_relative */ 1576 0, /* bitpos */ 1577 complain_overflow_bitfield, /* complain_on_overflow */ 1578 bfd_elf_generic_reloc, /* special_function */ 1579 "R_PPC_VLE_SDAREL_LO16A", /* name */ 1580 FALSE, /* partial_inplace */ 1581 0, /* src_mask */ 1582 0x1f007ff, /* dst_mask */ 1583 FALSE), /* pcrel_offset */ 1584 1585 /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */ 1586 /* This reloc does nothing. */ 1587 HOWTO (R_PPC_VLE_SDAREL_LO16D, /* type */ 1588 0, /* rightshift */ 1589 2, /* size (0 = byte, 1 = short, 2 = long) */ 1590 32, /* bitsize */ 1591 FALSE, /* pc_relative */ 1592 0, /* bitpos */ 1593 complain_overflow_bitfield, /* complain_on_overflow */ 1594 bfd_elf_generic_reloc, /* special_function */ 1595 "R_PPC_VLE_SDAREL_LO16D", /* name */ 1596 FALSE, /* partial_inplace */ 1597 0, /* src_mask */ 1598 0x1f07ff, /* dst_mask */ 1599 FALSE), /* pcrel_offset */ 1600 1601 /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */ 1602 HOWTO (R_PPC_VLE_SDAREL_HI16A, /* type */ 1603 0, /* rightshift */ 1604 2, /* size (0 = byte, 1 = short, 2 = long) */ 1605 32, /* bitsize */ 1606 FALSE, /* pc_relative */ 1607 0, /* bitpos */ 1608 complain_overflow_bitfield, /* complain_on_overflow */ 1609 bfd_elf_generic_reloc, /* special_function */ 1610 "R_PPC_VLE_SDAREL_HI16A", /* name */ 1611 FALSE, /* partial_inplace */ 1612 0, /* src_mask */ 1613 0x1f007ff, /* dst_mask */ 1614 FALSE), /* pcrel_offset */ 1615 1616 /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */ 1617 HOWTO (R_PPC_VLE_SDAREL_HI16D, /* type */ 1618 0, /* rightshift */ 1619 2, /* size (0 = byte, 1 = short, 2 = long) */ 1620 32, /* bitsize */ 1621 FALSE, /* pc_relative */ 1622 0, /* bitpos */ 1623 complain_overflow_bitfield, /* complain_on_overflow */ 1624 bfd_elf_generic_reloc, /* special_function */ 1625 "R_PPC_VLE_SDAREL_HI16D", /* name */ 1626 FALSE, /* partial_inplace */ 1627 0, /* src_mask */ 1628 0x1f07ff, /* dst_mask */ 1629 FALSE), /* pcrel_offset */ 1630 1631 /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */ 1632 HOWTO (R_PPC_VLE_SDAREL_HA16A, /* type */ 1633 0, /* rightshift */ 1634 2, /* size (0 = byte, 1 = short, 2 = long) */ 1635 32, /* bitsize */ 1636 FALSE, /* pc_relative */ 1637 0, /* bitpos */ 1638 complain_overflow_bitfield, /* complain_on_overflow */ 1639 bfd_elf_generic_reloc, /* special_function */ 1640 "R_PPC_VLE_SDAREL_HA16A", /* name */ 1641 FALSE, /* partial_inplace */ 1642 0, /* src_mask */ 1643 0x1f007ff, /* dst_mask */ 1644 FALSE), /* pcrel_offset */ 1645 1646 /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */ 1647 HOWTO (R_PPC_VLE_SDAREL_HA16D, /* type */ 1648 0, /* rightshift */ 1649 2, /* size (0 = byte, 1 = short, 2 = long) */ 1650 32, /* bitsize */ 1651 FALSE, /* pc_relative */ 1652 0, /* bitpos */ 1653 complain_overflow_bitfield, /* complain_on_overflow */ 1654 bfd_elf_generic_reloc, /* special_function */ 1655 "R_PPC_VLE_SDAREL_HA16D", /* name */ 1656 FALSE, /* partial_inplace */ 1657 0, /* src_mask */ 1658 0x1f07ff, /* dst_mask */ 1659 FALSE), /* pcrel_offset */ 1660 1661 HOWTO (R_PPC_IRELATIVE, /* type */ 1662 0, /* rightshift */ 1663 2, /* size (0 = byte, 1 = short, 2 = long) */ 1664 32, /* bitsize */ 1665 FALSE, /* pc_relative */ 1666 0, /* bitpos */ 1667 complain_overflow_bitfield, /* complain_on_overflow */ 1668 bfd_elf_generic_reloc, /* special_function */ 1669 "R_PPC_IRELATIVE", /* name */ 1670 FALSE, /* partial_inplace */ 1671 0, /* src_mask */ 1672 0xffffffff, /* dst_mask */ 1673 FALSE), /* pcrel_offset */ 1674 1675 /* A 16 bit relative relocation. */ 1676 HOWTO (R_PPC_REL16, /* type */ 1677 0, /* rightshift */ 1678 1, /* size (0 = byte, 1 = short, 2 = long) */ 1679 16, /* bitsize */ 1680 TRUE, /* pc_relative */ 1681 0, /* bitpos */ 1682 complain_overflow_bitfield, /* complain_on_overflow */ 1683 bfd_elf_generic_reloc, /* special_function */ 1684 "R_PPC_REL16", /* name */ 1685 FALSE, /* partial_inplace */ 1686 0, /* src_mask */ 1687 0xffff, /* dst_mask */ 1688 TRUE), /* pcrel_offset */ 1689 1690 /* A 16 bit relative relocation without overflow. */ 1691 HOWTO (R_PPC_REL16_LO, /* type */ 1692 0, /* rightshift */ 1693 1, /* size (0 = byte, 1 = short, 2 = long) */ 1694 16, /* bitsize */ 1695 TRUE, /* pc_relative */ 1696 0, /* bitpos */ 1697 complain_overflow_dont,/* complain_on_overflow */ 1698 bfd_elf_generic_reloc, /* special_function */ 1699 "R_PPC_REL16_LO", /* name */ 1700 FALSE, /* partial_inplace */ 1701 0, /* src_mask */ 1702 0xffff, /* dst_mask */ 1703 TRUE), /* pcrel_offset */ 1704 1705 /* The high order 16 bits of a relative address. */ 1706 HOWTO (R_PPC_REL16_HI, /* type */ 1707 16, /* rightshift */ 1708 1, /* size (0 = byte, 1 = short, 2 = long) */ 1709 16, /* bitsize */ 1710 TRUE, /* pc_relative */ 1711 0, /* bitpos */ 1712 complain_overflow_dont, /* complain_on_overflow */ 1713 bfd_elf_generic_reloc, /* special_function */ 1714 "R_PPC_REL16_HI", /* name */ 1715 FALSE, /* partial_inplace */ 1716 0, /* src_mask */ 1717 0xffff, /* dst_mask */ 1718 TRUE), /* pcrel_offset */ 1719 1720 /* The high order 16 bits of a relative address, plus 1 if the contents of 1721 the low 16 bits, treated as a signed number, is negative. */ 1722 HOWTO (R_PPC_REL16_HA, /* type */ 1723 16, /* rightshift */ 1724 1, /* size (0 = byte, 1 = short, 2 = long) */ 1725 16, /* bitsize */ 1726 TRUE, /* pc_relative */ 1727 0, /* bitpos */ 1728 complain_overflow_dont, /* complain_on_overflow */ 1729 ppc_elf_addr16_ha_reloc, /* special_function */ 1730 "R_PPC_REL16_HA", /* name */ 1731 FALSE, /* partial_inplace */ 1732 0, /* src_mask */ 1733 0xffff, /* dst_mask */ 1734 TRUE), /* pcrel_offset */ 1735 1736 /* GNU extension to record C++ vtable hierarchy. */ 1737 HOWTO (R_PPC_GNU_VTINHERIT, /* type */ 1738 0, /* rightshift */ 1739 0, /* size (0 = byte, 1 = short, 2 = long) */ 1740 0, /* bitsize */ 1741 FALSE, /* pc_relative */ 1742 0, /* bitpos */ 1743 complain_overflow_dont, /* complain_on_overflow */ 1744 NULL, /* special_function */ 1745 "R_PPC_GNU_VTINHERIT", /* name */ 1746 FALSE, /* partial_inplace */ 1747 0, /* src_mask */ 1748 0, /* dst_mask */ 1749 FALSE), /* pcrel_offset */ 1750 1751 /* GNU extension to record C++ vtable member usage. */ 1752 HOWTO (R_PPC_GNU_VTENTRY, /* type */ 1753 0, /* rightshift */ 1754 0, /* size (0 = byte, 1 = short, 2 = long) */ 1755 0, /* bitsize */ 1756 FALSE, /* pc_relative */ 1757 0, /* bitpos */ 1758 complain_overflow_dont, /* complain_on_overflow */ 1759 NULL, /* special_function */ 1760 "R_PPC_GNU_VTENTRY", /* name */ 1761 FALSE, /* partial_inplace */ 1762 0, /* src_mask */ 1763 0, /* dst_mask */ 1764 FALSE), /* pcrel_offset */ 1765 1766 /* Phony reloc to handle AIX style TOC entries. */ 1767 HOWTO (R_PPC_TOC16, /* type */ 1768 0, /* rightshift */ 1769 1, /* size (0 = byte, 1 = short, 2 = long) */ 1770 16, /* bitsize */ 1771 FALSE, /* pc_relative */ 1772 0, /* bitpos */ 1773 complain_overflow_signed, /* complain_on_overflow */ 1774 bfd_elf_generic_reloc, /* special_function */ 1775 "R_PPC_TOC16", /* name */ 1776 FALSE, /* partial_inplace */ 1777 0, /* src_mask */ 1778 0xffff, /* dst_mask */ 1779 FALSE), /* pcrel_offset */ 1780 }; 1781 1782 /* External 32-bit PPC structure for PRPSINFO. This structure is 1783 ABI-defined, thus we choose to use char arrays here in order to 1784 avoid dealing with different types in different architectures. 1785 1786 The PPC 32-bit structure uses int for `pr_uid' and `pr_gid' while 1787 most non-PPC architectures use `short int'. 1788 1789 This structure will ultimately be written in the corefile's note 1790 section, as the PRPSINFO. */ 1791 1792 struct elf_external_ppc_linux_prpsinfo32 1793 { 1794 char pr_state; /* Numeric process state. */ 1795 char pr_sname; /* Char for pr_state. */ 1796 char pr_zomb; /* Zombie. */ 1797 char pr_nice; /* Nice val. */ 1798 char pr_flag[4]; /* Flags. */ 1799 char pr_uid[4]; 1800 char pr_gid[4]; 1801 char pr_pid[4]; 1802 char pr_ppid[4]; 1803 char pr_pgrp[4]; 1804 char pr_sid[4]; 1805 char pr_fname[16]; /* Filename of executable. */ 1806 char pr_psargs[80]; /* Initial part of arg list. */ 1807 }; 1808 1809 /* Helper macro to swap (properly handling endianess) things from the 1810 `elf_internal_prpsinfo' structure to the `elf_external_ppc_prpsinfo32' 1811 structure. 1812 1813 Note that FROM should be a pointer, and TO should be the explicit type. */ 1814 1815 #define PPC_LINUX_PRPSINFO32_SWAP_FIELDS(abfd, from, to) \ 1816 do \ 1817 { \ 1818 H_PUT_8 (abfd, from->pr_state, &to.pr_state); \ 1819 H_PUT_8 (abfd, from->pr_sname, &to.pr_sname); \ 1820 H_PUT_8 (abfd, from->pr_zomb, &to.pr_zomb); \ 1821 H_PUT_8 (abfd, from->pr_nice, &to.pr_nice); \ 1822 H_PUT_32 (abfd, from->pr_flag, to.pr_flag); \ 1823 H_PUT_32 (abfd, from->pr_uid, to.pr_uid); \ 1824 H_PUT_32 (abfd, from->pr_gid, to.pr_gid); \ 1825 H_PUT_32 (abfd, from->pr_pid, to.pr_pid); \ 1826 H_PUT_32 (abfd, from->pr_ppid, to.pr_ppid); \ 1827 H_PUT_32 (abfd, from->pr_pgrp, to.pr_pgrp); \ 1828 H_PUT_32 (abfd, from->pr_sid, to.pr_sid); \ 1829 strncpy (to.pr_fname, from->pr_fname, sizeof (to.pr_fname)); \ 1830 strncpy (to.pr_psargs, from->pr_psargs, sizeof (to.pr_psargs)); \ 1831 } while (0) 1832 1833 1834 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */ 1835 1836 static void 1837 ppc_elf_howto_init (void) 1838 { 1839 unsigned int i, type; 1840 1841 for (i = 0; 1842 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]); 1843 i++) 1844 { 1845 type = ppc_elf_howto_raw[i].type; 1846 if (type >= (sizeof (ppc_elf_howto_table) 1847 / sizeof (ppc_elf_howto_table[0]))) 1848 abort (); 1849 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i]; 1850 } 1851 } 1852 1853 static reloc_howto_type * 1854 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 1855 bfd_reloc_code_real_type code) 1856 { 1857 enum elf_ppc_reloc_type r; 1858 1859 /* Initialize howto table if not already done. */ 1860 if (!ppc_elf_howto_table[R_PPC_ADDR32]) 1861 ppc_elf_howto_init (); 1862 1863 switch (code) 1864 { 1865 default: 1866 return NULL; 1867 1868 case BFD_RELOC_NONE: r = R_PPC_NONE; break; 1869 case BFD_RELOC_32: r = R_PPC_ADDR32; break; 1870 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break; 1871 case BFD_RELOC_PPC64_ADDR16_DS: 1872 case BFD_RELOC_16: r = R_PPC_ADDR16; break; 1873 case BFD_RELOC_PPC64_ADDR16_LO_DS: 1874 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break; 1875 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break; 1876 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break; 1877 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break; 1878 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break; 1879 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break; 1880 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break; 1881 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break; 1882 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break; 1883 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break; 1884 case BFD_RELOC_PPC64_GOT16_DS: 1885 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break; 1886 case BFD_RELOC_PPC64_GOT16_LO_DS: 1887 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break; 1888 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break; 1889 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break; 1890 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break; 1891 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break; 1892 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break; 1893 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break; 1894 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break; 1895 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break; 1896 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break; 1897 case BFD_RELOC_PPC64_PLT16_LO_DS: 1898 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break; 1899 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break; 1900 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break; 1901 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break; 1902 case BFD_RELOC_PPC64_SECTOFF_DS: 1903 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break; 1904 case BFD_RELOC_PPC64_SECTOFF_LO_DS: 1905 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break; 1906 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break; 1907 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break; 1908 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break; 1909 case BFD_RELOC_PPC64_TOC16_DS: 1910 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break; 1911 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break; 1912 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break; 1913 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break; 1914 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break; 1915 case BFD_RELOC_PPC64_TPREL16_DS: 1916 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break; 1917 case BFD_RELOC_PPC64_TPREL16_LO_DS: 1918 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break; 1919 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break; 1920 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break; 1921 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break; 1922 case BFD_RELOC_PPC64_DTPREL16_DS: 1923 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break; 1924 case BFD_RELOC_PPC64_DTPREL16_LO_DS: 1925 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break; 1926 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break; 1927 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break; 1928 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break; 1929 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break; 1930 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break; 1931 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break; 1932 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break; 1933 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break; 1934 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break; 1935 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break; 1936 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break; 1937 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break; 1938 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break; 1939 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break; 1940 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break; 1941 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break; 1942 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break; 1943 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break; 1944 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break; 1945 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break; 1946 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break; 1947 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break; 1948 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break; 1949 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break; 1950 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break; 1951 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break; 1952 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break; 1953 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break; 1954 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break; 1955 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break; 1956 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break; 1957 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break; 1958 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break; 1959 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break; 1960 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break; 1961 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break; 1962 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break; 1963 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break; 1964 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break; 1965 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break; 1966 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break; 1967 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break; 1968 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break; 1969 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break; 1970 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break; 1971 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break; 1972 case BFD_RELOC_PPC_VLE_SDAREL_LO16A: 1973 r = R_PPC_VLE_SDAREL_LO16A; 1974 break; 1975 case BFD_RELOC_PPC_VLE_SDAREL_LO16D: 1976 r = R_PPC_VLE_SDAREL_LO16D; 1977 break; 1978 case BFD_RELOC_PPC_VLE_SDAREL_HI16A: 1979 r = R_PPC_VLE_SDAREL_HI16A; 1980 break; 1981 case BFD_RELOC_PPC_VLE_SDAREL_HI16D: 1982 r = R_PPC_VLE_SDAREL_HI16D; 1983 break; 1984 case BFD_RELOC_PPC_VLE_SDAREL_HA16A: 1985 r = R_PPC_VLE_SDAREL_HA16A; 1986 break; 1987 case BFD_RELOC_PPC_VLE_SDAREL_HA16D: 1988 r = R_PPC_VLE_SDAREL_HA16D; 1989 break; 1990 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break; 1991 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break; 1992 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break; 1993 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break; 1994 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break; 1995 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break; 1996 } 1997 1998 return ppc_elf_howto_table[r]; 1999 }; 2000 2001 static reloc_howto_type * 2002 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 2003 const char *r_name) 2004 { 2005 unsigned int i; 2006 2007 for (i = 0; 2008 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]); 2009 i++) 2010 if (ppc_elf_howto_raw[i].name != NULL 2011 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0) 2012 return &ppc_elf_howto_raw[i]; 2013 2014 return NULL; 2015 } 2016 2017 /* Set the howto pointer for a PowerPC ELF reloc. */ 2018 2019 static void 2020 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, 2021 arelent *cache_ptr, 2022 Elf_Internal_Rela *dst) 2023 { 2024 /* Initialize howto table if not already done. */ 2025 if (!ppc_elf_howto_table[R_PPC_ADDR32]) 2026 ppc_elf_howto_init (); 2027 2028 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max); 2029 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)]; 2030 2031 /* Just because the above assert didn't trigger doesn't mean that 2032 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */ 2033 if (!cache_ptr->howto) 2034 { 2035 (*_bfd_error_handler) (_("%B: invalid relocation type %d"), 2036 abfd, ELF32_R_TYPE (dst->r_info)); 2037 bfd_set_error (bfd_error_bad_value); 2038 2039 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE]; 2040 } 2041 } 2042 2043 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */ 2044 2045 static bfd_reloc_status_type 2046 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED, 2047 arelent *reloc_entry, 2048 asymbol *symbol, 2049 void *data ATTRIBUTE_UNUSED, 2050 asection *input_section, 2051 bfd *output_bfd, 2052 char **error_message ATTRIBUTE_UNUSED) 2053 { 2054 bfd_vma relocation; 2055 2056 if (output_bfd != NULL) 2057 { 2058 reloc_entry->address += input_section->output_offset; 2059 return bfd_reloc_ok; 2060 } 2061 2062 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) 2063 return bfd_reloc_outofrange; 2064 2065 if (bfd_is_com_section (symbol->section)) 2066 relocation = 0; 2067 else 2068 relocation = symbol->value; 2069 2070 relocation += symbol->section->output_section->vma; 2071 relocation += symbol->section->output_offset; 2072 relocation += reloc_entry->addend; 2073 if (reloc_entry->howto->pc_relative) 2074 relocation -= reloc_entry->address; 2075 2076 reloc_entry->addend += (relocation & 0x8000) << 1; 2077 2078 return bfd_reloc_continue; 2079 } 2080 2081 static bfd_reloc_status_type 2082 ppc_elf_unhandled_reloc (bfd *abfd, 2083 arelent *reloc_entry, 2084 asymbol *symbol, 2085 void *data, 2086 asection *input_section, 2087 bfd *output_bfd, 2088 char **error_message) 2089 { 2090 /* If this is a relocatable link (output_bfd test tells us), just 2091 call the generic function. Any adjustment will be done at final 2092 link time. */ 2093 if (output_bfd != NULL) 2094 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, 2095 input_section, output_bfd, error_message); 2096 2097 if (error_message != NULL) 2098 { 2099 static char buf[60]; 2100 sprintf (buf, _("generic linker can't handle %s"), 2101 reloc_entry->howto->name); 2102 *error_message = buf; 2103 } 2104 return bfd_reloc_dangerous; 2105 } 2106 2107 /* Sections created by the linker. */ 2108 2109 typedef struct elf_linker_section 2110 { 2111 /* Pointer to the bfd section. */ 2112 asection *section; 2113 /* Section name. */ 2114 const char *name; 2115 /* Associated bss section name. */ 2116 const char *bss_name; 2117 /* Associated symbol name. */ 2118 const char *sym_name; 2119 /* Associated symbol. */ 2120 struct elf_link_hash_entry *sym; 2121 } elf_linker_section_t; 2122 2123 /* Linked list of allocated pointer entries. This hangs off of the 2124 symbol lists, and provides allows us to return different pointers, 2125 based on different addend's. */ 2126 2127 typedef struct elf_linker_section_pointers 2128 { 2129 /* next allocated pointer for this symbol */ 2130 struct elf_linker_section_pointers *next; 2131 /* offset of pointer from beginning of section */ 2132 bfd_vma offset; 2133 /* addend used */ 2134 bfd_vma addend; 2135 /* which linker section this is */ 2136 elf_linker_section_t *lsect; 2137 } elf_linker_section_pointers_t; 2138 2139 struct ppc_elf_obj_tdata 2140 { 2141 struct elf_obj_tdata elf; 2142 2143 /* A mapping from local symbols to offsets into the various linker 2144 sections added. This is index by the symbol index. */ 2145 elf_linker_section_pointers_t **linker_section_pointers; 2146 2147 /* Flags used to auto-detect plt type. */ 2148 unsigned int makes_plt_call : 1; 2149 unsigned int has_rel16 : 1; 2150 }; 2151 2152 #define ppc_elf_tdata(bfd) \ 2153 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any) 2154 2155 #define elf_local_ptr_offsets(bfd) \ 2156 (ppc_elf_tdata (bfd)->linker_section_pointers) 2157 2158 #define is_ppc_elf(bfd) \ 2159 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ 2160 && elf_object_id (bfd) == PPC32_ELF_DATA) 2161 2162 /* Override the generic function because we store some extras. */ 2163 2164 static bfd_boolean 2165 ppc_elf_mkobject (bfd *abfd) 2166 { 2167 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata), 2168 PPC32_ELF_DATA); 2169 } 2170 2171 /* Fix bad default arch selected for a 32 bit input bfd when the 2172 default is 64 bit. */ 2173 2174 static bfd_boolean 2175 ppc_elf_object_p (bfd *abfd) 2176 { 2177 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64) 2178 { 2179 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd); 2180 2181 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32) 2182 { 2183 /* Relies on arch after 64 bit default being 32 bit default. */ 2184 abfd->arch_info = abfd->arch_info->next; 2185 BFD_ASSERT (abfd->arch_info->bits_per_word == 32); 2186 } 2187 } 2188 return TRUE; 2189 } 2190 2191 /* Function to set whether a module needs the -mrelocatable bit set. */ 2192 2193 static bfd_boolean 2194 ppc_elf_set_private_flags (bfd *abfd, flagword flags) 2195 { 2196 BFD_ASSERT (!elf_flags_init (abfd) 2197 || elf_elfheader (abfd)->e_flags == flags); 2198 2199 elf_elfheader (abfd)->e_flags = flags; 2200 elf_flags_init (abfd) = TRUE; 2201 return TRUE; 2202 } 2203 2204 /* Support for core dump NOTE sections. */ 2205 2206 static bfd_boolean 2207 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) 2208 { 2209 int offset; 2210 unsigned int size; 2211 2212 switch (note->descsz) 2213 { 2214 default: 2215 return FALSE; 2216 2217 case 268: /* Linux/PPC. */ 2218 /* pr_cursig */ 2219 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); 2220 2221 /* pr_pid */ 2222 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); 2223 2224 /* pr_reg */ 2225 offset = 72; 2226 size = 192; 2227 2228 break; 2229 } 2230 2231 /* Make a ".reg/999" section. */ 2232 return _bfd_elfcore_make_pseudosection (abfd, ".reg", 2233 size, note->descpos + offset); 2234 } 2235 2236 static bfd_boolean 2237 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) 2238 { 2239 switch (note->descsz) 2240 { 2241 default: 2242 return FALSE; 2243 2244 case 128: /* Linux/PPC elf_prpsinfo. */ 2245 elf_tdata (abfd)->core->pid 2246 = bfd_get_32 (abfd, note->descdata + 16); 2247 elf_tdata (abfd)->core->program 2248 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16); 2249 elf_tdata (abfd)->core->command 2250 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80); 2251 } 2252 2253 /* Note that for some reason, a spurious space is tacked 2254 onto the end of the args in some (at least one anyway) 2255 implementations, so strip it off if it exists. */ 2256 2257 { 2258 char *command = elf_tdata (abfd)->core->command; 2259 int n = strlen (command); 2260 2261 if (0 < n && command[n - 1] == ' ') 2262 command[n - 1] = '\0'; 2263 } 2264 2265 return TRUE; 2266 } 2267 2268 char * 2269 elfcore_write_ppc_linux_prpsinfo32 (bfd *abfd, char *buf, int *bufsiz, 2270 const struct elf_internal_linux_prpsinfo *prpsinfo) 2271 { 2272 struct elf_external_ppc_linux_prpsinfo32 data; 2273 2274 memset (&data, 0, sizeof (data)); 2275 PPC_LINUX_PRPSINFO32_SWAP_FIELDS (abfd, prpsinfo, data); 2276 2277 return elfcore_write_note (abfd, buf, bufsiz, 2278 "CORE", NT_PRPSINFO, &data, sizeof (data)); 2279 } 2280 2281 static char * 2282 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...) 2283 { 2284 switch (note_type) 2285 { 2286 default: 2287 return NULL; 2288 2289 case NT_PRPSINFO: 2290 { 2291 char data[128]; 2292 va_list ap; 2293 2294 va_start (ap, note_type); 2295 memset (data, 0, sizeof (data)); 2296 strncpy (data + 32, va_arg (ap, const char *), 16); 2297 strncpy (data + 48, va_arg (ap, const char *), 80); 2298 va_end (ap); 2299 return elfcore_write_note (abfd, buf, bufsiz, 2300 "CORE", note_type, data, sizeof (data)); 2301 } 2302 2303 case NT_PRSTATUS: 2304 { 2305 char data[268]; 2306 va_list ap; 2307 long pid; 2308 int cursig; 2309 const void *greg; 2310 2311 va_start (ap, note_type); 2312 memset (data, 0, 72); 2313 pid = va_arg (ap, long); 2314 bfd_put_32 (abfd, pid, data + 24); 2315 cursig = va_arg (ap, int); 2316 bfd_put_16 (abfd, cursig, data + 12); 2317 greg = va_arg (ap, const void *); 2318 memcpy (data + 72, greg, 192); 2319 memset (data + 264, 0, 4); 2320 va_end (ap); 2321 return elfcore_write_note (abfd, buf, bufsiz, 2322 "CORE", note_type, data, sizeof (data)); 2323 } 2324 } 2325 } 2326 2327 static flagword 2328 ppc_elf_lookup_section_flags (char *flag_name) 2329 { 2330 2331 if (!strcmp (flag_name, "SHF_PPC_VLE")) 2332 return SHF_PPC_VLE; 2333 2334 return 0; 2335 } 2336 2337 /* Add the VLE flag if required. */ 2338 2339 bfd_boolean 2340 ppc_elf_section_processing (bfd *abfd, Elf_Internal_Shdr *shdr) 2341 { 2342 if (bfd_get_mach (abfd) == bfd_mach_ppc_vle 2343 && (shdr->sh_flags & SHF_EXECINSTR) != 0) 2344 shdr->sh_flags |= SHF_PPC_VLE; 2345 2346 return TRUE; 2347 } 2348 2349 /* Return address for Ith PLT stub in section PLT, for relocation REL 2350 or (bfd_vma) -1 if it should not be included. */ 2351 2352 static bfd_vma 2353 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED, 2354 const asection *plt ATTRIBUTE_UNUSED, 2355 const arelent *rel) 2356 { 2357 return rel->address; 2358 } 2359 2360 /* Handle a PowerPC specific section when reading an object file. This 2361 is called when bfd_section_from_shdr finds a section with an unknown 2362 type. */ 2363 2364 static bfd_boolean 2365 ppc_elf_section_from_shdr (bfd *abfd, 2366 Elf_Internal_Shdr *hdr, 2367 const char *name, 2368 int shindex) 2369 { 2370 asection *newsect; 2371 flagword flags; 2372 2373 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) 2374 return FALSE; 2375 2376 newsect = hdr->bfd_section; 2377 flags = bfd_get_section_flags (abfd, newsect); 2378 if (hdr->sh_flags & SHF_EXCLUDE) 2379 flags |= SEC_EXCLUDE; 2380 2381 if (hdr->sh_type == SHT_ORDERED) 2382 flags |= SEC_SORT_ENTRIES; 2383 2384 bfd_set_section_flags (abfd, newsect, flags); 2385 return TRUE; 2386 } 2387 2388 /* Set up any other section flags and such that may be necessary. */ 2389 2390 static bfd_boolean 2391 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, 2392 Elf_Internal_Shdr *shdr, 2393 asection *asect) 2394 { 2395 if ((asect->flags & SEC_SORT_ENTRIES) != 0) 2396 shdr->sh_type = SHT_ORDERED; 2397 2398 return TRUE; 2399 } 2400 2401 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we 2402 need to bump up the number of section headers. */ 2403 2404 static int 2405 ppc_elf_additional_program_headers (bfd *abfd, 2406 struct bfd_link_info *info ATTRIBUTE_UNUSED) 2407 { 2408 asection *s; 2409 int ret = 0; 2410 2411 s = bfd_get_section_by_name (abfd, ".sbss2"); 2412 if (s != NULL && (s->flags & SEC_ALLOC) != 0) 2413 ++ret; 2414 2415 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0"); 2416 if (s != NULL && (s->flags & SEC_ALLOC) != 0) 2417 ++ret; 2418 2419 return ret; 2420 } 2421 2422 /* Modify the segment map for VLE executables. */ 2423 2424 bfd_boolean 2425 ppc_elf_modify_segment_map (bfd *abfd, 2426 struct bfd_link_info *info ATTRIBUTE_UNUSED) 2427 { 2428 struct elf_segment_map *m, *n; 2429 bfd_size_type amt; 2430 unsigned int j, k; 2431 bfd_boolean sect0_vle, sectj_vle; 2432 2433 /* At this point in the link, output sections have already been sorted by 2434 LMA and assigned to segments. All that is left to do is to ensure 2435 there is no mixing of VLE & non-VLE sections in a text segment. 2436 If we find that case, we split the segment. 2437 We maintain the original output section order. */ 2438 2439 for (m = elf_seg_map (abfd); m != NULL; m = m->next) 2440 { 2441 if (m->count == 0) 2442 continue; 2443 2444 sect0_vle = (elf_section_flags (m->sections[0]) & SHF_PPC_VLE) != 0; 2445 for (j = 1; j < m->count; ++j) 2446 { 2447 sectj_vle = (elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0; 2448 2449 if (sectj_vle != sect0_vle) 2450 break; 2451 } 2452 if (j >= m->count) 2453 continue; 2454 2455 /* sections 0..j-1 stay in this (current) segment, 2456 the remainder are put in a new segment. 2457 The scan resumes with the new segment. */ 2458 2459 /* Fix the new segment. */ 2460 amt = sizeof (struct elf_segment_map); 2461 amt += (m->count - j - 1) * sizeof (asection *); 2462 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt); 2463 if (n == NULL) 2464 return FALSE; 2465 2466 n->p_type = PT_LOAD; 2467 n->p_flags = PF_X | PF_R; 2468 if (sectj_vle) 2469 n->p_flags |= PF_PPC_VLE; 2470 n->count = m->count - j; 2471 for (k = 0; k < n->count; ++k) 2472 { 2473 n->sections[k] = m->sections[j+k]; 2474 m->sections[j+k] = NULL; 2475 } 2476 n->next = m->next; 2477 m->next = n; 2478 2479 /* Fix the current segment */ 2480 m->count = j; 2481 } 2482 2483 return TRUE; 2484 } 2485 2486 /* Add extra PPC sections -- Note, for now, make .sbss2 and 2487 .PPC.EMB.sbss0 a normal section, and not a bss section so 2488 that the linker doesn't crater when trying to make more than 2489 2 sections. */ 2490 2491 static const struct bfd_elf_special_section ppc_elf_special_sections[] = 2492 { 2493 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR }, 2494 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, 2495 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC }, 2496 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, 2497 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC }, 2498 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC }, 2499 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 }, 2500 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC }, 2501 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC }, 2502 { NULL, 0, 0, 0, 0 } 2503 }; 2504 2505 /* This is what we want for new plt/got. */ 2506 static struct bfd_elf_special_section ppc_alt_plt = 2507 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC }; 2508 2509 static const struct bfd_elf_special_section * 2510 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec) 2511 { 2512 const struct bfd_elf_special_section *ssect; 2513 2514 /* See if this is one of the special sections. */ 2515 if (sec->name == NULL) 2516 return NULL; 2517 2518 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections, 2519 sec->use_rela_p); 2520 if (ssect != NULL) 2521 { 2522 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0) 2523 ssect = &ppc_alt_plt; 2524 return ssect; 2525 } 2526 2527 return _bfd_elf_get_sec_type_attr (abfd, sec); 2528 } 2529 2530 /* Very simple linked list structure for recording apuinfo values. */ 2531 typedef struct apuinfo_list 2532 { 2533 struct apuinfo_list *next; 2534 unsigned long value; 2535 } 2536 apuinfo_list; 2537 2538 static apuinfo_list *head; 2539 static bfd_boolean apuinfo_set; 2540 2541 static void 2542 apuinfo_list_init (void) 2543 { 2544 head = NULL; 2545 apuinfo_set = FALSE; 2546 } 2547 2548 static void 2549 apuinfo_list_add (unsigned long value) 2550 { 2551 apuinfo_list *entry = head; 2552 2553 while (entry != NULL) 2554 { 2555 if (entry->value == value) 2556 return; 2557 entry = entry->next; 2558 } 2559 2560 entry = bfd_malloc (sizeof (* entry)); 2561 if (entry == NULL) 2562 return; 2563 2564 entry->value = value; 2565 entry->next = head; 2566 head = entry; 2567 } 2568 2569 static unsigned 2570 apuinfo_list_length (void) 2571 { 2572 apuinfo_list *entry; 2573 unsigned long count; 2574 2575 for (entry = head, count = 0; 2576 entry; 2577 entry = entry->next) 2578 ++ count; 2579 2580 return count; 2581 } 2582 2583 static inline unsigned long 2584 apuinfo_list_element (unsigned long number) 2585 { 2586 apuinfo_list * entry; 2587 2588 for (entry = head; 2589 entry && number --; 2590 entry = entry->next) 2591 ; 2592 2593 return entry ? entry->value : 0; 2594 } 2595 2596 static void 2597 apuinfo_list_finish (void) 2598 { 2599 apuinfo_list *entry; 2600 2601 for (entry = head; entry;) 2602 { 2603 apuinfo_list *next = entry->next; 2604 free (entry); 2605 entry = next; 2606 } 2607 2608 head = NULL; 2609 } 2610 2611 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo" 2612 #define APUINFO_LABEL "APUinfo" 2613 2614 /* Scan the input BFDs and create a linked list of 2615 the APUinfo values that will need to be emitted. */ 2616 2617 static void 2618 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info) 2619 { 2620 bfd *ibfd; 2621 asection *asec; 2622 char *buffer = NULL; 2623 bfd_size_type largest_input_size = 0; 2624 unsigned i; 2625 unsigned long length; 2626 const char *error_message = NULL; 2627 2628 if (link_info == NULL) 2629 return; 2630 2631 apuinfo_list_init (); 2632 2633 /* Read in the input sections contents. */ 2634 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next) 2635 { 2636 unsigned long datum; 2637 2638 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME); 2639 if (asec == NULL) 2640 continue; 2641 2642 error_message = _("corrupt %s section in %B"); 2643 length = asec->size; 2644 if (length < 20) 2645 goto fail; 2646 2647 apuinfo_set = TRUE; 2648 if (largest_input_size < asec->size) 2649 { 2650 if (buffer) 2651 free (buffer); 2652 largest_input_size = asec->size; 2653 buffer = bfd_malloc (largest_input_size); 2654 if (!buffer) 2655 return; 2656 } 2657 2658 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0 2659 || (bfd_bread (buffer, length, ibfd) != length)) 2660 { 2661 error_message = _("unable to read in %s section from %B"); 2662 goto fail; 2663 } 2664 2665 /* Verify the contents of the header. Note - we have to 2666 extract the values this way in order to allow for a 2667 host whose endian-ness is different from the target. */ 2668 datum = bfd_get_32 (ibfd, buffer); 2669 if (datum != sizeof APUINFO_LABEL) 2670 goto fail; 2671 2672 datum = bfd_get_32 (ibfd, buffer + 8); 2673 if (datum != 0x2) 2674 goto fail; 2675 2676 if (strcmp (buffer + 12, APUINFO_LABEL) != 0) 2677 goto fail; 2678 2679 /* Get the number of bytes used for apuinfo entries. */ 2680 datum = bfd_get_32 (ibfd, buffer + 4); 2681 if (datum + 20 != length) 2682 goto fail; 2683 2684 /* Scan the apuinfo section, building a list of apuinfo numbers. */ 2685 for (i = 0; i < datum; i += 4) 2686 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i)); 2687 } 2688 2689 error_message = NULL; 2690 2691 if (apuinfo_set) 2692 { 2693 /* Compute the size of the output section. */ 2694 unsigned num_entries = apuinfo_list_length (); 2695 2696 /* Set the output section size, if it exists. */ 2697 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); 2698 2699 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4)) 2700 { 2701 ibfd = abfd; 2702 error_message = _("warning: unable to set size of %s section in %B"); 2703 } 2704 } 2705 2706 fail: 2707 if (buffer) 2708 free (buffer); 2709 2710 if (error_message) 2711 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME); 2712 } 2713 2714 /* Prevent the output section from accumulating the input sections' 2715 contents. We have already stored this in our linked list structure. */ 2716 2717 static bfd_boolean 2718 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED, 2719 struct bfd_link_info *link_info ATTRIBUTE_UNUSED, 2720 asection *asec, 2721 bfd_byte *contents ATTRIBUTE_UNUSED) 2722 { 2723 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0; 2724 } 2725 2726 /* Finally we can generate the output section. */ 2727 2728 static void 2729 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED) 2730 { 2731 bfd_byte *buffer; 2732 asection *asec; 2733 unsigned i; 2734 unsigned num_entries; 2735 bfd_size_type length; 2736 2737 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); 2738 if (asec == NULL) 2739 return; 2740 2741 if (!apuinfo_set) 2742 return; 2743 2744 length = asec->size; 2745 if (length < 20) 2746 return; 2747 2748 buffer = bfd_malloc (length); 2749 if (buffer == NULL) 2750 { 2751 (*_bfd_error_handler) 2752 (_("failed to allocate space for new APUinfo section.")); 2753 return; 2754 } 2755 2756 /* Create the apuinfo header. */ 2757 num_entries = apuinfo_list_length (); 2758 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer); 2759 bfd_put_32 (abfd, num_entries * 4, buffer + 4); 2760 bfd_put_32 (abfd, 0x2, buffer + 8); 2761 strcpy ((char *) buffer + 12, APUINFO_LABEL); 2762 2763 length = 20; 2764 for (i = 0; i < num_entries; i++) 2765 { 2766 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length); 2767 length += 4; 2768 } 2769 2770 if (length != asec->size) 2771 (*_bfd_error_handler) (_("failed to compute new APUinfo section.")); 2772 2773 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length)) 2774 (*_bfd_error_handler) (_("failed to install new APUinfo section.")); 2775 2776 free (buffer); 2777 2778 apuinfo_list_finish (); 2779 } 2780 2781 static bfd_boolean 2782 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off) 2783 { 2784 bfd_byte buf[GLINK_ENTRY_SIZE]; 2785 2786 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE)) 2787 return FALSE; 2788 2789 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11 2790 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11 2791 && bfd_get_32 (abfd, buf + 8) == MTCTR_11 2792 && bfd_get_32 (abfd, buf + 12) == BCTR); 2793 } 2794 2795 static bfd_boolean 2796 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr) 2797 { 2798 bfd_vma vma = *(bfd_vma *) ptr; 2799 return ((section->flags & SEC_ALLOC) != 0 2800 && section->vma <= vma 2801 && vma < section->vma + section->size); 2802 } 2803 2804 static long 2805 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms, 2806 long dynsymcount, asymbol **dynsyms, 2807 asymbol **ret) 2808 { 2809 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean); 2810 asection *plt, *relplt, *dynamic, *glink; 2811 bfd_vma glink_vma = 0; 2812 bfd_vma resolv_vma = 0; 2813 bfd_vma stub_vma; 2814 asymbol *s; 2815 arelent *p; 2816 long count, i; 2817 size_t size; 2818 char *names; 2819 bfd_byte buf[4]; 2820 2821 *ret = NULL; 2822 2823 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0) 2824 return 0; 2825 2826 if (dynsymcount <= 0) 2827 return 0; 2828 2829 relplt = bfd_get_section_by_name (abfd, ".rela.plt"); 2830 if (relplt == NULL) 2831 return 0; 2832 2833 plt = bfd_get_section_by_name (abfd, ".plt"); 2834 if (plt == NULL) 2835 return 0; 2836 2837 /* Call common code to handle old-style executable PLTs. */ 2838 if (elf_section_flags (plt) & SHF_EXECINSTR) 2839 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms, 2840 dynsymcount, dynsyms, ret); 2841 2842 /* If this object was prelinked, the prelinker stored the address 2843 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */ 2844 dynamic = bfd_get_section_by_name (abfd, ".dynamic"); 2845 if (dynamic != NULL) 2846 { 2847 bfd_byte *dynbuf, *extdyn, *extdynend; 2848 size_t extdynsize; 2849 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *); 2850 2851 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf)) 2852 return -1; 2853 2854 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn; 2855 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in; 2856 2857 extdyn = dynbuf; 2858 extdynend = extdyn + dynamic->size; 2859 for (; extdyn < extdynend; extdyn += extdynsize) 2860 { 2861 Elf_Internal_Dyn dyn; 2862 (*swap_dyn_in) (abfd, extdyn, &dyn); 2863 2864 if (dyn.d_tag == DT_NULL) 2865 break; 2866 2867 if (dyn.d_tag == DT_PPC_GOT) 2868 { 2869 unsigned int g_o_t = dyn.d_un.d_val; 2870 asection *got = bfd_get_section_by_name (abfd, ".got"); 2871 if (got != NULL 2872 && bfd_get_section_contents (abfd, got, buf, 2873 g_o_t - got->vma + 4, 4)) 2874 glink_vma = bfd_get_32 (abfd, buf); 2875 break; 2876 } 2877 } 2878 free (dynbuf); 2879 } 2880 2881 /* Otherwise we read the first plt entry. */ 2882 if (glink_vma == 0) 2883 { 2884 if (bfd_get_section_contents (abfd, plt, buf, 0, 4)) 2885 glink_vma = bfd_get_32 (abfd, buf); 2886 } 2887 2888 if (glink_vma == 0) 2889 return 0; 2890 2891 /* The .glink section usually does not survive the final 2892 link; search for the section (usually .text) where the 2893 glink stubs now reside. */ 2894 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma); 2895 if (glink == NULL) 2896 return 0; 2897 2898 /* Determine glink PLT resolver by reading the relative branch 2899 from the first glink stub. */ 2900 if (bfd_get_section_contents (abfd, glink, buf, 2901 glink_vma - glink->vma, 4)) 2902 { 2903 unsigned int insn = bfd_get_32 (abfd, buf); 2904 2905 /* The first glink stub may either branch to the resolver ... */ 2906 insn ^= B; 2907 if ((insn & ~0x3fffffc) == 0) 2908 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000; 2909 2910 /* ... or fall through a bunch of NOPs. */ 2911 else if ((insn ^ B ^ NOP) == 0) 2912 for (i = 4; 2913 bfd_get_section_contents (abfd, glink, buf, 2914 glink_vma - glink->vma + i, 4); 2915 i += 4) 2916 if (bfd_get_32 (abfd, buf) != NOP) 2917 { 2918 resolv_vma = glink_vma + i; 2919 break; 2920 } 2921 } 2922 2923 count = relplt->size / sizeof (Elf32_External_Rela); 2924 stub_vma = glink_vma - (bfd_vma) count * 16; 2925 /* If the stubs are those for -shared/-pie then we might have 2926 multiple stubs for each plt entry. If that is the case then 2927 there is no way to associate stubs with their plt entries short 2928 of figuring out the GOT pointer value used in the stub. */ 2929 if (!is_nonpic_glink_stub (abfd, glink, 2930 glink_vma - GLINK_ENTRY_SIZE - glink->vma)) 2931 return 0; 2932 2933 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; 2934 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE)) 2935 return -1; 2936 2937 size = count * sizeof (asymbol); 2938 p = relplt->relocation; 2939 for (i = 0; i < count; i++, p++) 2940 { 2941 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt"); 2942 if (p->addend != 0) 2943 size += sizeof ("+0x") - 1 + 8; 2944 } 2945 2946 size += sizeof (asymbol) + sizeof ("__glink"); 2947 2948 if (resolv_vma) 2949 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve"); 2950 2951 s = *ret = bfd_malloc (size); 2952 if (s == NULL) 2953 return -1; 2954 2955 names = (char *) (s + count + 1 + (resolv_vma != 0)); 2956 p = relplt->relocation; 2957 for (i = 0; i < count; i++, p++) 2958 { 2959 size_t len; 2960 2961 *s = **p->sym_ptr_ptr; 2962 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since 2963 we are defining a symbol, ensure one of them is set. */ 2964 if ((s->flags & BSF_LOCAL) == 0) 2965 s->flags |= BSF_GLOBAL; 2966 s->flags |= BSF_SYNTHETIC; 2967 s->section = glink; 2968 s->value = stub_vma - glink->vma; 2969 s->name = names; 2970 s->udata.p = NULL; 2971 len = strlen ((*p->sym_ptr_ptr)->name); 2972 memcpy (names, (*p->sym_ptr_ptr)->name, len); 2973 names += len; 2974 if (p->addend != 0) 2975 { 2976 memcpy (names, "+0x", sizeof ("+0x") - 1); 2977 names += sizeof ("+0x") - 1; 2978 bfd_sprintf_vma (abfd, names, p->addend); 2979 names += strlen (names); 2980 } 2981 memcpy (names, "@plt", sizeof ("@plt")); 2982 names += sizeof ("@plt"); 2983 ++s; 2984 stub_vma += 16; 2985 } 2986 2987 /* Add a symbol at the start of the glink branch table. */ 2988 memset (s, 0, sizeof *s); 2989 s->the_bfd = abfd; 2990 s->flags = BSF_GLOBAL | BSF_SYNTHETIC; 2991 s->section = glink; 2992 s->value = glink_vma - glink->vma; 2993 s->name = names; 2994 memcpy (names, "__glink", sizeof ("__glink")); 2995 names += sizeof ("__glink"); 2996 s++; 2997 count++; 2998 2999 if (resolv_vma) 3000 { 3001 /* Add a symbol for the glink PLT resolver. */ 3002 memset (s, 0, sizeof *s); 3003 s->the_bfd = abfd; 3004 s->flags = BSF_GLOBAL | BSF_SYNTHETIC; 3005 s->section = glink; 3006 s->value = resolv_vma - glink->vma; 3007 s->name = names; 3008 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve")); 3009 names += sizeof ("__glink_PLTresolve"); 3010 s++; 3011 count++; 3012 } 3013 3014 return count; 3015 } 3016 3017 /* The following functions are specific to the ELF linker, while 3018 functions above are used generally. They appear in this file more 3019 or less in the order in which they are called. eg. 3020 ppc_elf_check_relocs is called early in the link process, 3021 ppc_elf_finish_dynamic_sections is one of the last functions 3022 called. */ 3023 3024 /* Track PLT entries needed for a given symbol. We might need more 3025 than one glink entry per symbol when generating a pic binary. */ 3026 struct plt_entry 3027 { 3028 struct plt_entry *next; 3029 3030 /* -fPIC uses multiple GOT sections, one per file, called ".got2". 3031 This field stores the offset into .got2 used to initialise the 3032 GOT pointer reg. It will always be at least 32768. (Current 3033 gcc always uses an offset of 32768, but ld -r will pack .got2 3034 sections together resulting in larger offsets). */ 3035 bfd_vma addend; 3036 3037 /* The .got2 section. */ 3038 asection *sec; 3039 3040 /* PLT refcount or offset. */ 3041 union 3042 { 3043 bfd_signed_vma refcount; 3044 bfd_vma offset; 3045 } plt; 3046 3047 /* .glink stub offset. */ 3048 bfd_vma glink_offset; 3049 }; 3050 3051 /* Of those relocs that might be copied as dynamic relocs, this function 3052 selects those that must be copied when linking a shared library, 3053 even when the symbol is local. */ 3054 3055 static int 3056 must_be_dyn_reloc (struct bfd_link_info *info, 3057 enum elf_ppc_reloc_type r_type) 3058 { 3059 switch (r_type) 3060 { 3061 default: 3062 return 1; 3063 3064 case R_PPC_REL24: 3065 case R_PPC_REL14: 3066 case R_PPC_REL14_BRTAKEN: 3067 case R_PPC_REL14_BRNTAKEN: 3068 case R_PPC_REL32: 3069 return 0; 3070 3071 case R_PPC_TPREL32: 3072 case R_PPC_TPREL16: 3073 case R_PPC_TPREL16_LO: 3074 case R_PPC_TPREL16_HI: 3075 case R_PPC_TPREL16_HA: 3076 return !info->executable; 3077 } 3078 } 3079 3080 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid 3081 copying dynamic variables from a shared lib into an app's dynbss 3082 section, and instead use a dynamic relocation to point into the 3083 shared lib. */ 3084 #define ELIMINATE_COPY_RELOCS 1 3085 3086 /* PPC ELF linker hash entry. */ 3087 3088 struct ppc_elf_link_hash_entry 3089 { 3090 struct elf_link_hash_entry elf; 3091 3092 /* If this symbol is used in the linker created sections, the processor 3093 specific backend uses this field to map the field into the offset 3094 from the beginning of the section. */ 3095 elf_linker_section_pointers_t *linker_section_pointer; 3096 3097 /* Track dynamic relocs copied for this symbol. */ 3098 struct elf_dyn_relocs *dyn_relocs; 3099 3100 /* Contexts in which symbol is used in the GOT (or TOC). 3101 TLS_GD .. TLS_TLS bits are or'd into the mask as the 3102 corresponding relocs are encountered during check_relocs. 3103 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to 3104 indicate the corresponding GOT entry type is not needed. */ 3105 #define TLS_GD 1 /* GD reloc. */ 3106 #define TLS_LD 2 /* LD reloc. */ 3107 #define TLS_TPREL 4 /* TPREL reloc, => IE. */ 3108 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */ 3109 #define TLS_TLS 16 /* Any TLS reloc. */ 3110 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */ 3111 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */ 3112 char tls_mask; 3113 3114 /* Nonzero if we have seen a small data relocation referring to this 3115 symbol. */ 3116 unsigned char has_sda_refs; 3117 }; 3118 3119 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent)) 3120 3121 /* PPC ELF linker hash table. */ 3122 3123 struct ppc_elf_link_hash_table 3124 { 3125 struct elf_link_hash_table elf; 3126 3127 /* Short-cuts to get to dynamic linker sections. */ 3128 asection *got; 3129 asection *relgot; 3130 asection *glink; 3131 asection *plt; 3132 asection *relplt; 3133 asection *iplt; 3134 asection *reliplt; 3135 asection *dynbss; 3136 asection *relbss; 3137 asection *dynsbss; 3138 asection *relsbss; 3139 elf_linker_section_t sdata[2]; 3140 asection *sbss; 3141 asection *glink_eh_frame; 3142 3143 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */ 3144 asection *srelplt2; 3145 3146 /* The .got.plt section (VxWorks only)*/ 3147 asection *sgotplt; 3148 3149 /* Shortcut to __tls_get_addr. */ 3150 struct elf_link_hash_entry *tls_get_addr; 3151 3152 /* The bfd that forced an old-style PLT. */ 3153 bfd *old_bfd; 3154 3155 /* TLS local dynamic got entry handling. */ 3156 union { 3157 bfd_signed_vma refcount; 3158 bfd_vma offset; 3159 } tlsld_got; 3160 3161 /* Offset of branch table to PltResolve function in glink. */ 3162 bfd_vma glink_pltresolve; 3163 3164 /* Size of reserved GOT entries. */ 3165 unsigned int got_header_size; 3166 /* Non-zero if allocating the header left a gap. */ 3167 unsigned int got_gap; 3168 3169 /* The type of PLT we have chosen to use. */ 3170 enum ppc_elf_plt_type plt_type; 3171 3172 /* Set if we should emit symbols for stubs. */ 3173 unsigned int emit_stub_syms:1; 3174 3175 /* Set if __tls_get_addr optimization should not be done. */ 3176 unsigned int no_tls_get_addr_opt:1; 3177 3178 /* True if the target system is VxWorks. */ 3179 unsigned int is_vxworks:1; 3180 3181 /* The size of PLT entries. */ 3182 int plt_entry_size; 3183 /* The distance between adjacent PLT slots. */ 3184 int plt_slot_size; 3185 /* The size of the first PLT entry. */ 3186 int plt_initial_entry_size; 3187 3188 /* Small local sym cache. */ 3189 struct sym_cache sym_cache; 3190 }; 3191 3192 /* Rename some of the generic section flags to better document how they 3193 are used for ppc32. The flags are only valid for ppc32 elf objects. */ 3194 3195 /* Nonzero if this section has TLS related relocations. */ 3196 #define has_tls_reloc sec_flg0 3197 3198 /* Nonzero if this section has a call to __tls_get_addr. */ 3199 #define has_tls_get_addr_call sec_flg1 3200 3201 /* Get the PPC ELF linker hash table from a link_info structure. */ 3202 3203 #define ppc_elf_hash_table(p) \ 3204 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ 3205 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL) 3206 3207 /* Create an entry in a PPC ELF linker hash table. */ 3208 3209 static struct bfd_hash_entry * 3210 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry, 3211 struct bfd_hash_table *table, 3212 const char *string) 3213 { 3214 /* Allocate the structure if it has not already been allocated by a 3215 subclass. */ 3216 if (entry == NULL) 3217 { 3218 entry = bfd_hash_allocate (table, 3219 sizeof (struct ppc_elf_link_hash_entry)); 3220 if (entry == NULL) 3221 return entry; 3222 } 3223 3224 /* Call the allocation method of the superclass. */ 3225 entry = _bfd_elf_link_hash_newfunc (entry, table, string); 3226 if (entry != NULL) 3227 { 3228 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL; 3229 ppc_elf_hash_entry (entry)->dyn_relocs = NULL; 3230 ppc_elf_hash_entry (entry)->tls_mask = 0; 3231 ppc_elf_hash_entry (entry)->has_sda_refs = 0; 3232 } 3233 3234 return entry; 3235 } 3236 3237 /* Create a PPC ELF linker hash table. */ 3238 3239 static struct bfd_link_hash_table * 3240 ppc_elf_link_hash_table_create (bfd *abfd) 3241 { 3242 struct ppc_elf_link_hash_table *ret; 3243 3244 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table)); 3245 if (ret == NULL) 3246 return NULL; 3247 3248 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, 3249 ppc_elf_link_hash_newfunc, 3250 sizeof (struct ppc_elf_link_hash_entry), 3251 PPC32_ELF_DATA)) 3252 { 3253 free (ret); 3254 return NULL; 3255 } 3256 3257 ret->elf.init_plt_refcount.refcount = 0; 3258 ret->elf.init_plt_refcount.glist = NULL; 3259 ret->elf.init_plt_offset.offset = 0; 3260 ret->elf.init_plt_offset.glist = NULL; 3261 3262 ret->sdata[0].name = ".sdata"; 3263 ret->sdata[0].sym_name = "_SDA_BASE_"; 3264 ret->sdata[0].bss_name = ".sbss"; 3265 3266 ret->sdata[1].name = ".sdata2"; 3267 ret->sdata[1].sym_name = "_SDA2_BASE_"; 3268 ret->sdata[1].bss_name = ".sbss2"; 3269 3270 ret->plt_entry_size = 12; 3271 ret->plt_slot_size = 8; 3272 ret->plt_initial_entry_size = 72; 3273 3274 return &ret->elf.root; 3275 } 3276 3277 /* Create .got and the related sections. */ 3278 3279 static bfd_boolean 3280 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info) 3281 { 3282 struct ppc_elf_link_hash_table *htab; 3283 asection *s; 3284 flagword flags; 3285 3286 if (!_bfd_elf_create_got_section (abfd, info)) 3287 return FALSE; 3288 3289 htab = ppc_elf_hash_table (info); 3290 htab->got = s = bfd_get_linker_section (abfd, ".got"); 3291 if (s == NULL) 3292 abort (); 3293 3294 if (htab->is_vxworks) 3295 { 3296 htab->sgotplt = bfd_get_linker_section (abfd, ".got.plt"); 3297 if (!htab->sgotplt) 3298 abort (); 3299 } 3300 else 3301 { 3302 /* The powerpc .got has a blrl instruction in it. Mark it 3303 executable. */ 3304 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS 3305 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 3306 if (!bfd_set_section_flags (abfd, s, flags)) 3307 return FALSE; 3308 } 3309 3310 htab->relgot = bfd_get_linker_section (abfd, ".rela.got"); 3311 if (!htab->relgot) 3312 abort (); 3313 3314 return TRUE; 3315 } 3316 3317 static bfd_boolean 3318 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info) 3319 { 3320 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 3321 asection *s; 3322 flagword flags; 3323 3324 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS 3325 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 3326 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags); 3327 htab->glink = s; 3328 if (s == NULL 3329 || !bfd_set_section_alignment (abfd, s, 4)) 3330 return FALSE; 3331 3332 if (!info->no_ld_generated_unwind_info) 3333 { 3334 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS 3335 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 3336 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags); 3337 htab->glink_eh_frame = s; 3338 if (s == NULL 3339 || !bfd_set_section_alignment (abfd, s, 2)) 3340 return FALSE; 3341 } 3342 3343 flags = SEC_ALLOC | SEC_LINKER_CREATED; 3344 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags); 3345 htab->iplt = s; 3346 if (s == NULL 3347 || !bfd_set_section_alignment (abfd, s, 4)) 3348 return FALSE; 3349 3350 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS 3351 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 3352 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags); 3353 htab->reliplt = s; 3354 if (s == NULL 3355 || ! bfd_set_section_alignment (abfd, s, 2)) 3356 return FALSE; 3357 return TRUE; 3358 } 3359 3360 /* We have to create .dynsbss and .rela.sbss here so that they get mapped 3361 to output sections (just like _bfd_elf_create_dynamic_sections has 3362 to create .dynbss and .rela.bss). */ 3363 3364 static bfd_boolean 3365 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) 3366 { 3367 struct ppc_elf_link_hash_table *htab; 3368 asection *s; 3369 flagword flags; 3370 3371 htab = ppc_elf_hash_table (info); 3372 3373 if (htab->got == NULL 3374 && !ppc_elf_create_got (abfd, info)) 3375 return FALSE; 3376 3377 if (!_bfd_elf_create_dynamic_sections (abfd, info)) 3378 return FALSE; 3379 3380 if (htab->glink == NULL 3381 && !ppc_elf_create_glink (abfd, info)) 3382 return FALSE; 3383 3384 htab->dynbss = bfd_get_linker_section (abfd, ".dynbss"); 3385 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss", 3386 SEC_ALLOC | SEC_LINKER_CREATED); 3387 htab->dynsbss = s; 3388 if (s == NULL) 3389 return FALSE; 3390 3391 if (! info->shared) 3392 { 3393 htab->relbss = bfd_get_linker_section (abfd, ".rela.bss"); 3394 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS 3395 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 3396 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags); 3397 htab->relsbss = s; 3398 if (s == NULL 3399 || ! bfd_set_section_alignment (abfd, s, 2)) 3400 return FALSE; 3401 } 3402 3403 if (htab->is_vxworks 3404 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2)) 3405 return FALSE; 3406 3407 htab->relplt = bfd_get_linker_section (abfd, ".rela.plt"); 3408 htab->plt = s = bfd_get_linker_section (abfd, ".plt"); 3409 if (s == NULL) 3410 abort (); 3411 3412 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED; 3413 if (htab->plt_type == PLT_VXWORKS) 3414 /* The VxWorks PLT is a loaded section with contents. */ 3415 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY; 3416 return bfd_set_section_flags (abfd, s, flags); 3417 } 3418 3419 /* Copy the extra info we tack onto an elf_link_hash_entry. */ 3420 3421 static void 3422 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info, 3423 struct elf_link_hash_entry *dir, 3424 struct elf_link_hash_entry *ind) 3425 { 3426 struct ppc_elf_link_hash_entry *edir, *eind; 3427 3428 edir = (struct ppc_elf_link_hash_entry *) dir; 3429 eind = (struct ppc_elf_link_hash_entry *) ind; 3430 3431 edir->tls_mask |= eind->tls_mask; 3432 edir->has_sda_refs |= eind->has_sda_refs; 3433 3434 /* If called to transfer flags for a weakdef during processing 3435 of elf_adjust_dynamic_symbol, don't copy non_got_ref. 3436 We clear it ourselves for ELIMINATE_COPY_RELOCS. */ 3437 if (!(ELIMINATE_COPY_RELOCS 3438 && eind->elf.root.type != bfd_link_hash_indirect 3439 && edir->elf.dynamic_adjusted)) 3440 edir->elf.non_got_ref |= eind->elf.non_got_ref; 3441 3442 edir->elf.ref_dynamic |= eind->elf.ref_dynamic; 3443 edir->elf.ref_regular |= eind->elf.ref_regular; 3444 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak; 3445 edir->elf.needs_plt |= eind->elf.needs_plt; 3446 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed; 3447 3448 if (eind->dyn_relocs != NULL) 3449 { 3450 if (edir->dyn_relocs != NULL) 3451 { 3452 struct elf_dyn_relocs **pp; 3453 struct elf_dyn_relocs *p; 3454 3455 /* Add reloc counts against the indirect sym to the direct sym 3456 list. Merge any entries against the same section. */ 3457 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) 3458 { 3459 struct elf_dyn_relocs *q; 3460 3461 for (q = edir->dyn_relocs; q != NULL; q = q->next) 3462 if (q->sec == p->sec) 3463 { 3464 q->pc_count += p->pc_count; 3465 q->count += p->count; 3466 *pp = p->next; 3467 break; 3468 } 3469 if (q == NULL) 3470 pp = &p->next; 3471 } 3472 *pp = edir->dyn_relocs; 3473 } 3474 3475 edir->dyn_relocs = eind->dyn_relocs; 3476 eind->dyn_relocs = NULL; 3477 } 3478 3479 /* If we were called to copy over info for a weak sym, that's all. 3480 You might think dyn_relocs need not be copied over; After all, 3481 both syms will be dynamic or both non-dynamic so we're just 3482 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS 3483 code in ppc_elf_adjust_dynamic_symbol needs to check for 3484 dyn_relocs in read-only sections, and it does so on what is the 3485 DIR sym here. */ 3486 if (eind->elf.root.type != bfd_link_hash_indirect) 3487 return; 3488 3489 /* Copy over the GOT refcount entries that we may have already seen to 3490 the symbol which just became indirect. */ 3491 edir->elf.got.refcount += eind->elf.got.refcount; 3492 eind->elf.got.refcount = 0; 3493 3494 /* And plt entries. */ 3495 if (eind->elf.plt.plist != NULL) 3496 { 3497 if (edir->elf.plt.plist != NULL) 3498 { 3499 struct plt_entry **entp; 3500 struct plt_entry *ent; 3501 3502 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; ) 3503 { 3504 struct plt_entry *dent; 3505 3506 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next) 3507 if (dent->sec == ent->sec && dent->addend == ent->addend) 3508 { 3509 dent->plt.refcount += ent->plt.refcount; 3510 *entp = ent->next; 3511 break; 3512 } 3513 if (dent == NULL) 3514 entp = &ent->next; 3515 } 3516 *entp = edir->elf.plt.plist; 3517 } 3518 3519 edir->elf.plt.plist = eind->elf.plt.plist; 3520 eind->elf.plt.plist = NULL; 3521 } 3522 3523 if (eind->elf.dynindx != -1) 3524 { 3525 if (edir->elf.dynindx != -1) 3526 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, 3527 edir->elf.dynstr_index); 3528 edir->elf.dynindx = eind->elf.dynindx; 3529 edir->elf.dynstr_index = eind->elf.dynstr_index; 3530 eind->elf.dynindx = -1; 3531 eind->elf.dynstr_index = 0; 3532 } 3533 } 3534 3535 /* Hook called by the linker routine which adds symbols from an object 3536 file. We use it to put .comm items in .sbss, and not .bss. */ 3537 3538 static bfd_boolean 3539 ppc_elf_add_symbol_hook (bfd *abfd, 3540 struct bfd_link_info *info, 3541 Elf_Internal_Sym *sym, 3542 const char **namep ATTRIBUTE_UNUSED, 3543 flagword *flagsp ATTRIBUTE_UNUSED, 3544 asection **secp, 3545 bfd_vma *valp) 3546 { 3547 if (sym->st_shndx == SHN_COMMON 3548 && !info->relocatable 3549 && is_ppc_elf (info->output_bfd) 3550 && sym->st_size <= elf_gp_size (abfd)) 3551 { 3552 /* Common symbols less than or equal to -G nn bytes are automatically 3553 put into .sbss. */ 3554 struct ppc_elf_link_hash_table *htab; 3555 3556 htab = ppc_elf_hash_table (info); 3557 if (htab->sbss == NULL) 3558 { 3559 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED; 3560 3561 if (!htab->elf.dynobj) 3562 htab->elf.dynobj = abfd; 3563 3564 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj, 3565 ".sbss", 3566 flags); 3567 if (htab->sbss == NULL) 3568 return FALSE; 3569 } 3570 3571 *secp = htab->sbss; 3572 *valp = sym->st_size; 3573 } 3574 3575 if ((abfd->flags & DYNAMIC) == 0 3576 && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC 3577 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE)) 3578 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE; 3579 3580 return TRUE; 3581 } 3582 3583 static bfd_boolean 3584 create_sdata_sym (struct bfd_link_info *info, elf_linker_section_t *lsect) 3585 { 3586 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 3587 3588 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name, 3589 TRUE, FALSE, TRUE); 3590 if (lsect->sym == NULL) 3591 return FALSE; 3592 if (lsect->sym->root.type == bfd_link_hash_new) 3593 lsect->sym->non_elf = 0; 3594 lsect->sym->ref_regular = 1; 3595 _bfd_elf_link_hash_hide_symbol (info, lsect->sym, TRUE); 3596 return TRUE; 3597 } 3598 3599 /* Create a special linker section. */ 3600 3601 static bfd_boolean 3602 ppc_elf_create_linker_section (bfd *abfd, 3603 struct bfd_link_info *info, 3604 flagword flags, 3605 elf_linker_section_t *lsect) 3606 { 3607 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 3608 asection *s; 3609 3610 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY 3611 | SEC_LINKER_CREATED); 3612 3613 /* Record the first bfd that needs the special sections. */ 3614 if (!htab->elf.dynobj) 3615 htab->elf.dynobj = abfd; 3616 3617 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj, 3618 lsect->name, 3619 flags); 3620 if (s == NULL 3621 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2)) 3622 return FALSE; 3623 lsect->section = s; 3624 3625 return create_sdata_sym (info, lsect); 3626 } 3627 3628 /* Find a linker generated pointer with a given addend and type. */ 3629 3630 static elf_linker_section_pointers_t * 3631 elf_find_pointer_linker_section 3632 (elf_linker_section_pointers_t *linker_pointers, 3633 bfd_vma addend, 3634 elf_linker_section_t *lsect) 3635 { 3636 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next) 3637 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend) 3638 return linker_pointers; 3639 3640 return NULL; 3641 } 3642 3643 /* Allocate a pointer to live in a linker created section. */ 3644 3645 static bfd_boolean 3646 elf_create_pointer_linker_section (bfd *abfd, 3647 elf_linker_section_t *lsect, 3648 struct elf_link_hash_entry *h, 3649 const Elf_Internal_Rela *rel) 3650 { 3651 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL; 3652 elf_linker_section_pointers_t *linker_section_ptr; 3653 unsigned long r_symndx = ELF32_R_SYM (rel->r_info); 3654 bfd_size_type amt; 3655 3656 BFD_ASSERT (lsect != NULL); 3657 3658 /* Is this a global symbol? */ 3659 if (h != NULL) 3660 { 3661 struct ppc_elf_link_hash_entry *eh; 3662 3663 /* Has this symbol already been allocated? If so, our work is done. */ 3664 eh = (struct ppc_elf_link_hash_entry *) h; 3665 if (elf_find_pointer_linker_section (eh->linker_section_pointer, 3666 rel->r_addend, 3667 lsect)) 3668 return TRUE; 3669 3670 ptr_linker_section_ptr = &eh->linker_section_pointer; 3671 } 3672 else 3673 { 3674 BFD_ASSERT (is_ppc_elf (abfd)); 3675 3676 /* Allocation of a pointer to a local symbol. */ 3677 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd); 3678 3679 /* Allocate a table to hold the local symbols if first time. */ 3680 if (!ptr) 3681 { 3682 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info; 3683 3684 amt = num_symbols; 3685 amt *= sizeof (elf_linker_section_pointers_t *); 3686 ptr = bfd_zalloc (abfd, amt); 3687 3688 if (!ptr) 3689 return FALSE; 3690 3691 elf_local_ptr_offsets (abfd) = ptr; 3692 } 3693 3694 /* Has this symbol already been allocated? If so, our work is done. */ 3695 if (elf_find_pointer_linker_section (ptr[r_symndx], 3696 rel->r_addend, 3697 lsect)) 3698 return TRUE; 3699 3700 ptr_linker_section_ptr = &ptr[r_symndx]; 3701 } 3702 3703 /* Allocate space for a pointer in the linker section, and allocate 3704 a new pointer record from internal memory. */ 3705 BFD_ASSERT (ptr_linker_section_ptr != NULL); 3706 amt = sizeof (elf_linker_section_pointers_t); 3707 linker_section_ptr = bfd_alloc (abfd, amt); 3708 3709 if (!linker_section_ptr) 3710 return FALSE; 3711 3712 linker_section_ptr->next = *ptr_linker_section_ptr; 3713 linker_section_ptr->addend = rel->r_addend; 3714 linker_section_ptr->lsect = lsect; 3715 *ptr_linker_section_ptr = linker_section_ptr; 3716 3717 linker_section_ptr->offset = lsect->section->size; 3718 lsect->section->size += 4; 3719 3720 #ifdef DEBUG 3721 fprintf (stderr, 3722 "Create pointer in linker section %s, offset = %ld, section size = %ld\n", 3723 lsect->name, (long) linker_section_ptr->offset, 3724 (long) lsect->section->size); 3725 #endif 3726 3727 return TRUE; 3728 } 3729 3730 static struct plt_entry ** 3731 update_local_sym_info (bfd *abfd, 3732 Elf_Internal_Shdr *symtab_hdr, 3733 unsigned long r_symndx, 3734 int tls_type) 3735 { 3736 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd); 3737 struct plt_entry **local_plt; 3738 char *local_got_tls_masks; 3739 3740 if (local_got_refcounts == NULL) 3741 { 3742 bfd_size_type size = symtab_hdr->sh_info; 3743 3744 size *= (sizeof (*local_got_refcounts) 3745 + sizeof (*local_plt) 3746 + sizeof (*local_got_tls_masks)); 3747 local_got_refcounts = bfd_zalloc (abfd, size); 3748 if (local_got_refcounts == NULL) 3749 return NULL; 3750 elf_local_got_refcounts (abfd) = local_got_refcounts; 3751 } 3752 3753 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info); 3754 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info); 3755 local_got_tls_masks[r_symndx] |= tls_type; 3756 if (tls_type != PLT_IFUNC) 3757 local_got_refcounts[r_symndx] += 1; 3758 return local_plt + r_symndx; 3759 } 3760 3761 static bfd_boolean 3762 update_plt_info (bfd *abfd, struct plt_entry **plist, 3763 asection *sec, bfd_vma addend) 3764 { 3765 struct plt_entry *ent; 3766 3767 if (addend < 32768) 3768 sec = NULL; 3769 for (ent = *plist; ent != NULL; ent = ent->next) 3770 if (ent->sec == sec && ent->addend == addend) 3771 break; 3772 if (ent == NULL) 3773 { 3774 bfd_size_type amt = sizeof (*ent); 3775 ent = bfd_alloc (abfd, amt); 3776 if (ent == NULL) 3777 return FALSE; 3778 ent->next = *plist; 3779 ent->sec = sec; 3780 ent->addend = addend; 3781 ent->plt.refcount = 0; 3782 *plist = ent; 3783 } 3784 ent->plt.refcount += 1; 3785 return TRUE; 3786 } 3787 3788 static struct plt_entry * 3789 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend) 3790 { 3791 struct plt_entry *ent; 3792 3793 if (addend < 32768) 3794 sec = NULL; 3795 for (ent = *plist; ent != NULL; ent = ent->next) 3796 if (ent->sec == sec && ent->addend == addend) 3797 break; 3798 return ent; 3799 } 3800 3801 static bfd_boolean 3802 is_branch_reloc (enum elf_ppc_reloc_type r_type) 3803 { 3804 return (r_type == R_PPC_PLTREL24 3805 || r_type == R_PPC_LOCAL24PC 3806 || r_type == R_PPC_REL24 3807 || r_type == R_PPC_REL14 3808 || r_type == R_PPC_REL14_BRTAKEN 3809 || r_type == R_PPC_REL14_BRNTAKEN 3810 || r_type == R_PPC_ADDR24 3811 || r_type == R_PPC_ADDR14 3812 || r_type == R_PPC_ADDR14_BRTAKEN 3813 || r_type == R_PPC_ADDR14_BRNTAKEN); 3814 } 3815 3816 static void 3817 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type) 3818 { 3819 (*_bfd_error_handler) 3820 (_("%B: relocation %s cannot be used when making a shared object"), 3821 abfd, 3822 ppc_elf_howto_table[r_type]->name); 3823 bfd_set_error (bfd_error_bad_value); 3824 } 3825 3826 /* Look through the relocs for a section during the first phase, and 3827 allocate space in the global offset table or procedure linkage 3828 table. */ 3829 3830 static bfd_boolean 3831 ppc_elf_check_relocs (bfd *abfd, 3832 struct bfd_link_info *info, 3833 asection *sec, 3834 const Elf_Internal_Rela *relocs) 3835 { 3836 struct ppc_elf_link_hash_table *htab; 3837 Elf_Internal_Shdr *symtab_hdr; 3838 struct elf_link_hash_entry **sym_hashes; 3839 const Elf_Internal_Rela *rel; 3840 const Elf_Internal_Rela *rel_end; 3841 asection *got2, *sreloc; 3842 struct elf_link_hash_entry *tga; 3843 3844 if (info->relocatable) 3845 return TRUE; 3846 3847 /* Don't do anything special with non-loaded, non-alloced sections. 3848 In particular, any relocs in such sections should not affect GOT 3849 and PLT reference counting (ie. we don't allow them to create GOT 3850 or PLT entries), there's no possibility or desire to optimize TLS 3851 relocs, and there's not much point in propagating relocs to shared 3852 libs that the dynamic linker won't relocate. */ 3853 if ((sec->flags & SEC_ALLOC) == 0) 3854 return TRUE; 3855 3856 #ifdef DEBUG 3857 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B", 3858 sec, abfd); 3859 #endif 3860 3861 BFD_ASSERT (is_ppc_elf (abfd)); 3862 3863 /* Initialize howto table if not already done. */ 3864 if (!ppc_elf_howto_table[R_PPC_ADDR32]) 3865 ppc_elf_howto_init (); 3866 3867 htab = ppc_elf_hash_table (info); 3868 if (htab->glink == NULL) 3869 { 3870 if (htab->elf.dynobj == NULL) 3871 htab->elf.dynobj = abfd; 3872 if (!ppc_elf_create_glink (htab->elf.dynobj, info)) 3873 return FALSE; 3874 } 3875 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr", 3876 FALSE, FALSE, TRUE); 3877 symtab_hdr = &elf_symtab_hdr (abfd); 3878 sym_hashes = elf_sym_hashes (abfd); 3879 got2 = bfd_get_section_by_name (abfd, ".got2"); 3880 sreloc = NULL; 3881 3882 rel_end = relocs + sec->reloc_count; 3883 for (rel = relocs; rel < rel_end; rel++) 3884 { 3885 unsigned long r_symndx; 3886 enum elf_ppc_reloc_type r_type; 3887 struct elf_link_hash_entry *h; 3888 int tls_type; 3889 3890 r_symndx = ELF32_R_SYM (rel->r_info); 3891 if (r_symndx < symtab_hdr->sh_info) 3892 h = NULL; 3893 else 3894 { 3895 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 3896 while (h->root.type == bfd_link_hash_indirect 3897 || h->root.type == bfd_link_hash_warning) 3898 h = (struct elf_link_hash_entry *) h->root.u.i.link; 3899 } 3900 3901 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got. 3902 This shows up in particular in an R_PPC_ADDR32 in the eabi 3903 startup code. */ 3904 if (h != NULL 3905 && htab->got == NULL 3906 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) 3907 { 3908 if (htab->elf.dynobj == NULL) 3909 htab->elf.dynobj = abfd; 3910 if (!ppc_elf_create_got (htab->elf.dynobj, info)) 3911 return FALSE; 3912 BFD_ASSERT (h == htab->elf.hgot); 3913 } 3914 3915 tls_type = 0; 3916 r_type = ELF32_R_TYPE (rel->r_info); 3917 if (h == NULL && !htab->is_vxworks) 3918 { 3919 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache, 3920 abfd, r_symndx); 3921 if (isym == NULL) 3922 return FALSE; 3923 3924 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC 3925 && (!info->shared 3926 || is_branch_reloc (r_type))) 3927 { 3928 struct plt_entry **ifunc; 3929 bfd_vma addend; 3930 3931 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx, 3932 PLT_IFUNC); 3933 if (ifunc == NULL) 3934 return FALSE; 3935 3936 /* STT_GNU_IFUNC symbols must have a PLT entry; 3937 In a non-pie executable even when there are 3938 no plt calls. */ 3939 addend = 0; 3940 if (r_type == R_PPC_PLTREL24) 3941 { 3942 ppc_elf_tdata (abfd)->makes_plt_call = 1; 3943 if (info->shared) 3944 addend = rel->r_addend; 3945 } 3946 if (!update_plt_info (abfd, ifunc, got2, addend)) 3947 return FALSE; 3948 } 3949 } 3950 3951 if (!htab->is_vxworks 3952 && is_branch_reloc (r_type) 3953 && h != NULL 3954 && h == tga) 3955 { 3956 if (rel != relocs 3957 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD 3958 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD)) 3959 /* We have a new-style __tls_get_addr call with a marker 3960 reloc. */ 3961 ; 3962 else 3963 /* Mark this section as having an old-style call. */ 3964 sec->has_tls_get_addr_call = 1; 3965 } 3966 3967 switch (r_type) 3968 { 3969 case R_PPC_TLSGD: 3970 case R_PPC_TLSLD: 3971 /* These special tls relocs tie a call to __tls_get_addr with 3972 its parameter symbol. */ 3973 break; 3974 3975 case R_PPC_GOT_TLSLD16: 3976 case R_PPC_GOT_TLSLD16_LO: 3977 case R_PPC_GOT_TLSLD16_HI: 3978 case R_PPC_GOT_TLSLD16_HA: 3979 tls_type = TLS_TLS | TLS_LD; 3980 goto dogottls; 3981 3982 case R_PPC_GOT_TLSGD16: 3983 case R_PPC_GOT_TLSGD16_LO: 3984 case R_PPC_GOT_TLSGD16_HI: 3985 case R_PPC_GOT_TLSGD16_HA: 3986 tls_type = TLS_TLS | TLS_GD; 3987 goto dogottls; 3988 3989 case R_PPC_GOT_TPREL16: 3990 case R_PPC_GOT_TPREL16_LO: 3991 case R_PPC_GOT_TPREL16_HI: 3992 case R_PPC_GOT_TPREL16_HA: 3993 if (!info->executable) 3994 info->flags |= DF_STATIC_TLS; 3995 tls_type = TLS_TLS | TLS_TPREL; 3996 goto dogottls; 3997 3998 case R_PPC_GOT_DTPREL16: 3999 case R_PPC_GOT_DTPREL16_LO: 4000 case R_PPC_GOT_DTPREL16_HI: 4001 case R_PPC_GOT_DTPREL16_HA: 4002 tls_type = TLS_TLS | TLS_DTPREL; 4003 dogottls: 4004 sec->has_tls_reloc = 1; 4005 /* Fall thru */ 4006 4007 /* GOT16 relocations */ 4008 case R_PPC_GOT16: 4009 case R_PPC_GOT16_LO: 4010 case R_PPC_GOT16_HI: 4011 case R_PPC_GOT16_HA: 4012 /* This symbol requires a global offset table entry. */ 4013 if (htab->got == NULL) 4014 { 4015 if (htab->elf.dynobj == NULL) 4016 htab->elf.dynobj = abfd; 4017 if (!ppc_elf_create_got (htab->elf.dynobj, info)) 4018 return FALSE; 4019 } 4020 if (h != NULL) 4021 { 4022 h->got.refcount += 1; 4023 ppc_elf_hash_entry (h)->tls_mask |= tls_type; 4024 } 4025 else 4026 /* This is a global offset table entry for a local symbol. */ 4027 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type)) 4028 return FALSE; 4029 4030 /* We may also need a plt entry if the symbol turns out to be 4031 an ifunc. */ 4032 if (h != NULL && !info->shared) 4033 { 4034 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0)) 4035 return FALSE; 4036 } 4037 break; 4038 4039 /* Indirect .sdata relocation. */ 4040 case R_PPC_EMB_SDAI16: 4041 if (info->shared) 4042 { 4043 bad_shared_reloc (abfd, r_type); 4044 return FALSE; 4045 } 4046 if (htab->sdata[0].section == NULL 4047 && !ppc_elf_create_linker_section (abfd, info, 0, 4048 &htab->sdata[0])) 4049 return FALSE; 4050 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0], 4051 h, rel)) 4052 return FALSE; 4053 if (h != NULL) 4054 { 4055 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 4056 h->non_got_ref = TRUE; 4057 } 4058 break; 4059 4060 /* Indirect .sdata2 relocation. */ 4061 case R_PPC_EMB_SDA2I16: 4062 if (info->shared) 4063 { 4064 bad_shared_reloc (abfd, r_type); 4065 return FALSE; 4066 } 4067 if (htab->sdata[1].section == NULL 4068 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY, 4069 &htab->sdata[1])) 4070 return FALSE; 4071 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1], 4072 h, rel)) 4073 return FALSE; 4074 if (h != NULL) 4075 { 4076 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 4077 h->non_got_ref = TRUE; 4078 } 4079 break; 4080 4081 case R_PPC_VLE_SDAREL_LO16A: 4082 case R_PPC_VLE_SDAREL_LO16D: 4083 case R_PPC_VLE_SDAREL_HI16A: 4084 case R_PPC_VLE_SDAREL_HI16D: 4085 case R_PPC_VLE_SDAREL_HA16A: 4086 case R_PPC_VLE_SDAREL_HA16D: 4087 case R_PPC_SDAREL16: 4088 if (htab->sdata[0].sym == NULL 4089 && !create_sdata_sym (info, &htab->sdata[0])) 4090 return FALSE; 4091 4092 if (htab->sdata[1].sym == NULL 4093 && !create_sdata_sym (info, &htab->sdata[1])) 4094 return FALSE; 4095 4096 if (h != NULL) 4097 { 4098 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 4099 h->non_got_ref = TRUE; 4100 } 4101 break; 4102 4103 case R_PPC_VLE_REL8: 4104 case R_PPC_VLE_REL15: 4105 case R_PPC_VLE_REL24: 4106 case R_PPC_VLE_LO16A: 4107 case R_PPC_VLE_LO16D: 4108 case R_PPC_VLE_HI16A: 4109 case R_PPC_VLE_HI16D: 4110 case R_PPC_VLE_HA16A: 4111 case R_PPC_VLE_HA16D: 4112 break; 4113 4114 case R_PPC_EMB_SDA2REL: 4115 if (info->shared) 4116 { 4117 bad_shared_reloc (abfd, r_type); 4118 return FALSE; 4119 } 4120 if (htab->sdata[1].sym == NULL 4121 && !create_sdata_sym (info, &htab->sdata[1])) 4122 return FALSE; 4123 if (h != NULL) 4124 { 4125 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 4126 h->non_got_ref = TRUE; 4127 } 4128 break; 4129 4130 case R_PPC_VLE_SDA21_LO: 4131 case R_PPC_VLE_SDA21: 4132 case R_PPC_EMB_SDA21: 4133 case R_PPC_EMB_RELSDA: 4134 if (info->shared) 4135 { 4136 bad_shared_reloc (abfd, r_type); 4137 return FALSE; 4138 } 4139 if (htab->sdata[0].sym == NULL 4140 && !create_sdata_sym (info, &htab->sdata[0])) 4141 return FALSE; 4142 if (htab->sdata[1].sym == NULL 4143 && !create_sdata_sym (info, &htab->sdata[1])) 4144 return FALSE; 4145 if (h != NULL) 4146 { 4147 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 4148 h->non_got_ref = TRUE; 4149 } 4150 break; 4151 4152 case R_PPC_EMB_NADDR32: 4153 case R_PPC_EMB_NADDR16: 4154 case R_PPC_EMB_NADDR16_LO: 4155 case R_PPC_EMB_NADDR16_HI: 4156 case R_PPC_EMB_NADDR16_HA: 4157 if (info->shared) 4158 { 4159 bad_shared_reloc (abfd, r_type); 4160 return FALSE; 4161 } 4162 if (h != NULL) 4163 h->non_got_ref = TRUE; 4164 break; 4165 4166 case R_PPC_PLTREL24: 4167 if (h == NULL) 4168 break; 4169 /* Fall through */ 4170 case R_PPC_PLT32: 4171 case R_PPC_PLTREL32: 4172 case R_PPC_PLT16_LO: 4173 case R_PPC_PLT16_HI: 4174 case R_PPC_PLT16_HA: 4175 #ifdef DEBUG 4176 fprintf (stderr, "Reloc requires a PLT entry\n"); 4177 #endif 4178 /* This symbol requires a procedure linkage table entry. We 4179 actually build the entry in finish_dynamic_symbol, 4180 because this might be a case of linking PIC code without 4181 linking in any dynamic objects, in which case we don't 4182 need to generate a procedure linkage table after all. */ 4183 4184 if (h == NULL) 4185 { 4186 /* It does not make sense to have a procedure linkage 4187 table entry for a local symbol. */ 4188 info->callbacks->einfo (_("%P: %H: %s reloc against local symbol\n"), 4189 abfd, sec, rel->r_offset, 4190 ppc_elf_howto_table[r_type]->name); 4191 bfd_set_error (bfd_error_bad_value); 4192 return FALSE; 4193 } 4194 else 4195 { 4196 bfd_vma addend = 0; 4197 4198 if (r_type == R_PPC_PLTREL24) 4199 { 4200 ppc_elf_tdata (abfd)->makes_plt_call = 1; 4201 if (info->shared) 4202 addend = rel->r_addend; 4203 } 4204 h->needs_plt = 1; 4205 if (!update_plt_info (abfd, &h->plt.plist, got2, addend)) 4206 return FALSE; 4207 } 4208 break; 4209 4210 /* The following relocations don't need to propagate the 4211 relocation if linking a shared object since they are 4212 section relative. */ 4213 case R_PPC_SECTOFF: 4214 case R_PPC_SECTOFF_LO: 4215 case R_PPC_SECTOFF_HI: 4216 case R_PPC_SECTOFF_HA: 4217 case R_PPC_DTPREL16: 4218 case R_PPC_DTPREL16_LO: 4219 case R_PPC_DTPREL16_HI: 4220 case R_PPC_DTPREL16_HA: 4221 case R_PPC_TOC16: 4222 break; 4223 4224 case R_PPC_REL16: 4225 case R_PPC_REL16_LO: 4226 case R_PPC_REL16_HI: 4227 case R_PPC_REL16_HA: 4228 ppc_elf_tdata (abfd)->has_rel16 = 1; 4229 break; 4230 4231 /* These are just markers. */ 4232 case R_PPC_TLS: 4233 case R_PPC_EMB_MRKREF: 4234 case R_PPC_NONE: 4235 case R_PPC_max: 4236 case R_PPC_RELAX: 4237 case R_PPC_RELAX_PLT: 4238 case R_PPC_RELAX_PLTREL24: 4239 break; 4240 4241 /* These should only appear in dynamic objects. */ 4242 case R_PPC_COPY: 4243 case R_PPC_GLOB_DAT: 4244 case R_PPC_JMP_SLOT: 4245 case R_PPC_RELATIVE: 4246 case R_PPC_IRELATIVE: 4247 break; 4248 4249 /* These aren't handled yet. We'll report an error later. */ 4250 case R_PPC_ADDR30: 4251 case R_PPC_EMB_RELSEC16: 4252 case R_PPC_EMB_RELST_LO: 4253 case R_PPC_EMB_RELST_HI: 4254 case R_PPC_EMB_RELST_HA: 4255 case R_PPC_EMB_BIT_FLD: 4256 break; 4257 4258 /* This refers only to functions defined in the shared library. */ 4259 case R_PPC_LOCAL24PC: 4260 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET) 4261 { 4262 htab->plt_type = PLT_OLD; 4263 htab->old_bfd = abfd; 4264 } 4265 break; 4266 4267 /* This relocation describes the C++ object vtable hierarchy. 4268 Reconstruct it for later use during GC. */ 4269 case R_PPC_GNU_VTINHERIT: 4270 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 4271 return FALSE; 4272 break; 4273 4274 /* This relocation describes which C++ vtable entries are actually 4275 used. Record for later use during GC. */ 4276 case R_PPC_GNU_VTENTRY: 4277 BFD_ASSERT (h != NULL); 4278 if (h != NULL 4279 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 4280 return FALSE; 4281 break; 4282 4283 /* We shouldn't really be seeing these. */ 4284 case R_PPC_TPREL32: 4285 case R_PPC_TPREL16: 4286 case R_PPC_TPREL16_LO: 4287 case R_PPC_TPREL16_HI: 4288 case R_PPC_TPREL16_HA: 4289 if (!info->executable) 4290 info->flags |= DF_STATIC_TLS; 4291 goto dodyn; 4292 4293 /* Nor these. */ 4294 case R_PPC_DTPMOD32: 4295 case R_PPC_DTPREL32: 4296 goto dodyn; 4297 4298 case R_PPC_REL32: 4299 if (h == NULL 4300 && got2 != NULL 4301 && (sec->flags & SEC_CODE) != 0 4302 && info->shared 4303 && htab->plt_type == PLT_UNSET) 4304 { 4305 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before 4306 the start of a function, which assembles to a REL32 4307 reference to .got2. If we detect one of these, then 4308 force the old PLT layout because the linker cannot 4309 reliably deduce the GOT pointer value needed for 4310 PLT call stubs. */ 4311 asection *s; 4312 Elf_Internal_Sym *isym; 4313 4314 isym = bfd_sym_from_r_symndx (&htab->sym_cache, 4315 abfd, r_symndx); 4316 if (isym == NULL) 4317 return FALSE; 4318 4319 s = bfd_section_from_elf_index (abfd, isym->st_shndx); 4320 if (s == got2) 4321 { 4322 htab->plt_type = PLT_OLD; 4323 htab->old_bfd = abfd; 4324 } 4325 } 4326 if (h == NULL || h == htab->elf.hgot) 4327 break; 4328 /* fall through */ 4329 4330 case R_PPC_ADDR32: 4331 case R_PPC_ADDR16: 4332 case R_PPC_ADDR16_LO: 4333 case R_PPC_ADDR16_HI: 4334 case R_PPC_ADDR16_HA: 4335 case R_PPC_UADDR32: 4336 case R_PPC_UADDR16: 4337 if (h != NULL && !info->shared) 4338 { 4339 /* We may need a plt entry if the symbol turns out to be 4340 a function defined in a dynamic object. */ 4341 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0)) 4342 return FALSE; 4343 4344 /* We may need a copy reloc too. */ 4345 h->non_got_ref = 1; 4346 h->pointer_equality_needed = 1; 4347 } 4348 goto dodyn; 4349 4350 case R_PPC_REL24: 4351 case R_PPC_REL14: 4352 case R_PPC_REL14_BRTAKEN: 4353 case R_PPC_REL14_BRNTAKEN: 4354 if (h == NULL) 4355 break; 4356 if (h == htab->elf.hgot) 4357 { 4358 if (htab->plt_type == PLT_UNSET) 4359 { 4360 htab->plt_type = PLT_OLD; 4361 htab->old_bfd = abfd; 4362 } 4363 break; 4364 } 4365 /* fall through */ 4366 4367 case R_PPC_ADDR24: 4368 case R_PPC_ADDR14: 4369 case R_PPC_ADDR14_BRTAKEN: 4370 case R_PPC_ADDR14_BRNTAKEN: 4371 if (h != NULL && !info->shared) 4372 { 4373 /* We may need a plt entry if the symbol turns out to be 4374 a function defined in a dynamic object. */ 4375 h->needs_plt = 1; 4376 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0)) 4377 return FALSE; 4378 break; 4379 } 4380 4381 dodyn: 4382 /* If we are creating a shared library, and this is a reloc 4383 against a global symbol, or a non PC relative reloc 4384 against a local symbol, then we need to copy the reloc 4385 into the shared library. However, if we are linking with 4386 -Bsymbolic, we do not need to copy a reloc against a 4387 global symbol which is defined in an object we are 4388 including in the link (i.e., DEF_REGULAR is set). At 4389 this point we have not seen all the input files, so it is 4390 possible that DEF_REGULAR is not set now but will be set 4391 later (it is never cleared). In case of a weak definition, 4392 DEF_REGULAR may be cleared later by a strong definition in 4393 a shared library. We account for that possibility below by 4394 storing information in the dyn_relocs field of the hash 4395 table entry. A similar situation occurs when creating 4396 shared libraries and symbol visibility changes render the 4397 symbol local. 4398 4399 If on the other hand, we are creating an executable, we 4400 may need to keep relocations for symbols satisfied by a 4401 dynamic library if we manage to avoid copy relocs for the 4402 symbol. */ 4403 if ((info->shared 4404 && (must_be_dyn_reloc (info, r_type) 4405 || (h != NULL 4406 && (! info->symbolic 4407 || h->root.type == bfd_link_hash_defweak 4408 || !h->def_regular)))) 4409 || (ELIMINATE_COPY_RELOCS 4410 && !info->shared 4411 && h != NULL 4412 && (h->root.type == bfd_link_hash_defweak 4413 || !h->def_regular))) 4414 { 4415 struct elf_dyn_relocs *p; 4416 struct elf_dyn_relocs **rel_head; 4417 4418 #ifdef DEBUG 4419 fprintf (stderr, 4420 "ppc_elf_check_relocs needs to " 4421 "create relocation for %s\n", 4422 (h && h->root.root.string 4423 ? h->root.root.string : "<unknown>")); 4424 #endif 4425 if (sreloc == NULL) 4426 { 4427 if (htab->elf.dynobj == NULL) 4428 htab->elf.dynobj = abfd; 4429 4430 sreloc = _bfd_elf_make_dynamic_reloc_section 4431 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE); 4432 4433 if (sreloc == NULL) 4434 return FALSE; 4435 } 4436 4437 /* If this is a global symbol, we count the number of 4438 relocations we need for this symbol. */ 4439 if (h != NULL) 4440 { 4441 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs; 4442 } 4443 else 4444 { 4445 /* Track dynamic relocs needed for local syms too. 4446 We really need local syms available to do this 4447 easily. Oh well. */ 4448 asection *s; 4449 void *vpp; 4450 Elf_Internal_Sym *isym; 4451 4452 isym = bfd_sym_from_r_symndx (&htab->sym_cache, 4453 abfd, r_symndx); 4454 if (isym == NULL) 4455 return FALSE; 4456 4457 s = bfd_section_from_elf_index (abfd, isym->st_shndx); 4458 if (s == NULL) 4459 s = sec; 4460 4461 vpp = &elf_section_data (s)->local_dynrel; 4462 rel_head = (struct elf_dyn_relocs **) vpp; 4463 } 4464 4465 p = *rel_head; 4466 if (p == NULL || p->sec != sec) 4467 { 4468 p = bfd_alloc (htab->elf.dynobj, sizeof *p); 4469 if (p == NULL) 4470 return FALSE; 4471 p->next = *rel_head; 4472 *rel_head = p; 4473 p->sec = sec; 4474 p->count = 0; 4475 p->pc_count = 0; 4476 } 4477 4478 p->count += 1; 4479 if (!must_be_dyn_reloc (info, r_type)) 4480 p->pc_count += 1; 4481 } 4482 4483 break; 4484 } 4485 } 4486 4487 return TRUE; 4488 } 4489 4490 4491 /* Merge object attributes from IBFD into OBFD. Raise an error if 4492 there are conflicting attributes. */ 4493 static bfd_boolean 4494 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd) 4495 { 4496 obj_attribute *in_attr, *in_attrs; 4497 obj_attribute *out_attr, *out_attrs; 4498 4499 if (!elf_known_obj_attributes_proc (obfd)[0].i) 4500 { 4501 /* This is the first object. Copy the attributes. */ 4502 _bfd_elf_copy_obj_attributes (ibfd, obfd); 4503 4504 /* Use the Tag_null value to indicate the attributes have been 4505 initialized. */ 4506 elf_known_obj_attributes_proc (obfd)[0].i = 1; 4507 4508 return TRUE; 4509 } 4510 4511 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU]; 4512 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU]; 4513 4514 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge 4515 non-conflicting ones. */ 4516 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP]; 4517 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP]; 4518 if (in_attr->i != out_attr->i) 4519 { 4520 out_attr->type = 1; 4521 if (out_attr->i == 0) 4522 out_attr->i = in_attr->i; 4523 else if (in_attr->i == 0) 4524 ; 4525 else if (out_attr->i == 1 && in_attr->i == 2) 4526 _bfd_error_handler 4527 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd); 4528 else if (out_attr->i == 1 && in_attr->i == 3) 4529 _bfd_error_handler 4530 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"), 4531 obfd, ibfd); 4532 else if (out_attr->i == 3 && in_attr->i == 1) 4533 _bfd_error_handler 4534 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"), 4535 ibfd, obfd); 4536 else if (out_attr->i == 3 && in_attr->i == 2) 4537 _bfd_error_handler 4538 (_("Warning: %B uses soft float, %B uses single-precision hard float"), 4539 ibfd, obfd); 4540 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3)) 4541 _bfd_error_handler 4542 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd); 4543 else if (in_attr->i > 3) 4544 _bfd_error_handler 4545 (_("Warning: %B uses unknown floating point ABI %d"), ibfd, 4546 in_attr->i); 4547 else 4548 _bfd_error_handler 4549 (_("Warning: %B uses unknown floating point ABI %d"), obfd, 4550 out_attr->i); 4551 } 4552 4553 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and 4554 merge non-conflicting ones. */ 4555 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector]; 4556 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector]; 4557 if (in_attr->i != out_attr->i) 4558 { 4559 const char *in_abi = NULL, *out_abi = NULL; 4560 4561 switch (in_attr->i) 4562 { 4563 case 1: in_abi = "generic"; break; 4564 case 2: in_abi = "AltiVec"; break; 4565 case 3: in_abi = "SPE"; break; 4566 } 4567 4568 switch (out_attr->i) 4569 { 4570 case 1: out_abi = "generic"; break; 4571 case 2: out_abi = "AltiVec"; break; 4572 case 3: out_abi = "SPE"; break; 4573 } 4574 4575 out_attr->type = 1; 4576 if (out_attr->i == 0) 4577 out_attr->i = in_attr->i; 4578 else if (in_attr->i == 0) 4579 ; 4580 /* For now, allow generic to transition to AltiVec or SPE 4581 without a warning. If GCC marked files with their stack 4582 alignment and used don't-care markings for files which are 4583 not affected by the vector ABI, we could warn about this 4584 case too. */ 4585 else if (out_attr->i == 1) 4586 out_attr->i = in_attr->i; 4587 else if (in_attr->i == 1) 4588 ; 4589 else if (in_abi == NULL) 4590 _bfd_error_handler 4591 (_("Warning: %B uses unknown vector ABI %d"), ibfd, 4592 in_attr->i); 4593 else if (out_abi == NULL) 4594 _bfd_error_handler 4595 (_("Warning: %B uses unknown vector ABI %d"), obfd, 4596 in_attr->i); 4597 else 4598 _bfd_error_handler 4599 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""), 4600 ibfd, obfd, in_abi, out_abi); 4601 } 4602 4603 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes 4604 and merge non-conflicting ones. */ 4605 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return]; 4606 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return]; 4607 if (in_attr->i != out_attr->i) 4608 { 4609 out_attr->type = 1; 4610 if (out_attr->i == 0) 4611 out_attr->i = in_attr->i; 4612 else if (in_attr->i == 0) 4613 ; 4614 else if (out_attr->i == 1 && in_attr->i == 2) 4615 _bfd_error_handler 4616 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd); 4617 else if (out_attr->i == 2 && in_attr->i == 1) 4618 _bfd_error_handler 4619 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd); 4620 else if (in_attr->i > 2) 4621 _bfd_error_handler 4622 (_("Warning: %B uses unknown small structure return convention %d"), ibfd, 4623 in_attr->i); 4624 else 4625 _bfd_error_handler 4626 (_("Warning: %B uses unknown small structure return convention %d"), obfd, 4627 out_attr->i); 4628 } 4629 4630 /* Merge Tag_compatibility attributes and any common GNU ones. */ 4631 _bfd_elf_merge_object_attributes (ibfd, obfd); 4632 4633 return TRUE; 4634 } 4635 4636 /* Merge backend specific data from an object file to the output 4637 object file when linking. */ 4638 4639 static bfd_boolean 4640 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) 4641 { 4642 flagword old_flags; 4643 flagword new_flags; 4644 bfd_boolean error; 4645 4646 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd)) 4647 return TRUE; 4648 4649 /* Check if we have the same endianness. */ 4650 if (! _bfd_generic_verify_endian_match (ibfd, obfd)) 4651 return FALSE; 4652 4653 if (!ppc_elf_merge_obj_attributes (ibfd, obfd)) 4654 return FALSE; 4655 4656 new_flags = elf_elfheader (ibfd)->e_flags; 4657 old_flags = elf_elfheader (obfd)->e_flags; 4658 if (!elf_flags_init (obfd)) 4659 { 4660 /* First call, no flags set. */ 4661 elf_flags_init (obfd) = TRUE; 4662 elf_elfheader (obfd)->e_flags = new_flags; 4663 } 4664 4665 /* Compatible flags are ok. */ 4666 else if (new_flags == old_flags) 4667 ; 4668 4669 /* Incompatible flags. */ 4670 else 4671 { 4672 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib 4673 to be linked with either. */ 4674 error = FALSE; 4675 if ((new_flags & EF_PPC_RELOCATABLE) != 0 4676 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0) 4677 { 4678 error = TRUE; 4679 (*_bfd_error_handler) 4680 (_("%B: compiled with -mrelocatable and linked with " 4681 "modules compiled normally"), ibfd); 4682 } 4683 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0 4684 && (old_flags & EF_PPC_RELOCATABLE) != 0) 4685 { 4686 error = TRUE; 4687 (*_bfd_error_handler) 4688 (_("%B: compiled normally and linked with " 4689 "modules compiled with -mrelocatable"), ibfd); 4690 } 4691 4692 /* The output is -mrelocatable-lib iff both the input files are. */ 4693 if (! (new_flags & EF_PPC_RELOCATABLE_LIB)) 4694 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB; 4695 4696 /* The output is -mrelocatable iff it can't be -mrelocatable-lib, 4697 but each input file is either -mrelocatable or -mrelocatable-lib. */ 4698 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB) 4699 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)) 4700 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))) 4701 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE; 4702 4703 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if 4704 any module uses it. */ 4705 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB); 4706 4707 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); 4708 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); 4709 4710 /* Warn about any other mismatches. */ 4711 if (new_flags != old_flags) 4712 { 4713 error = TRUE; 4714 (*_bfd_error_handler) 4715 (_("%B: uses different e_flags (0x%lx) fields " 4716 "than previous modules (0x%lx)"), 4717 ibfd, (long) new_flags, (long) old_flags); 4718 } 4719 4720 if (error) 4721 { 4722 bfd_set_error (bfd_error_bad_value); 4723 return FALSE; 4724 } 4725 } 4726 4727 return TRUE; 4728 } 4729 4730 static void 4731 ppc_elf_vle_split16 (bfd *output_bfd, bfd_byte *contents, 4732 bfd_vma offset, bfd_vma relocation, 4733 split16_format_type split16_format) 4734 4735 { 4736 bfd_vma insn, top5, bottom11; 4737 4738 insn = bfd_get_32 (output_bfd, contents + offset); 4739 top5 = relocation >> 11; 4740 top5 = top5 << (split16_format == split16a_type ? 20 : 16); 4741 bottom11 = relocation & 0x7ff; 4742 insn |= top5; 4743 insn |= bottom11; 4744 bfd_put_32 (output_bfd, insn, contents + offset); 4745 } 4746 4747 4748 /* Choose which PLT scheme to use, and set .plt flags appropriately. 4749 Returns -1 on error, 0 for old PLT, 1 for new PLT. */ 4750 int 4751 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED, 4752 struct bfd_link_info *info, 4753 enum ppc_elf_plt_type plt_style, 4754 int emit_stub_syms) 4755 { 4756 struct ppc_elf_link_hash_table *htab; 4757 flagword flags; 4758 4759 htab = ppc_elf_hash_table (info); 4760 4761 htab->emit_stub_syms = emit_stub_syms; 4762 4763 if (htab->plt_type == PLT_UNSET) 4764 { 4765 struct elf_link_hash_entry *h; 4766 4767 if (plt_style == PLT_OLD) 4768 htab->plt_type = PLT_OLD; 4769 else if (info->shared 4770 && htab->elf.dynamic_sections_created 4771 && (h = elf_link_hash_lookup (&htab->elf, "_mcount", 4772 FALSE, FALSE, TRUE)) != NULL 4773 && (h->type == STT_FUNC 4774 || h->needs_plt) 4775 && h->ref_regular 4776 && !(SYMBOL_CALLS_LOCAL (info, h) 4777 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 4778 && h->root.type == bfd_link_hash_undefweak))) 4779 { 4780 /* Profiling of shared libs (and pies) is not supported with 4781 secure plt, because ppc32 does profiling before a 4782 function prologue and a secure plt pic call stubs needs 4783 r30 to be set up. */ 4784 htab->plt_type = PLT_OLD; 4785 } 4786 else 4787 { 4788 bfd *ibfd; 4789 enum ppc_elf_plt_type plt_type = plt_style; 4790 4791 /* Look through the reloc flags left by ppc_elf_check_relocs. 4792 Use the old style bss plt if a file makes plt calls 4793 without using the new relocs, and if ld isn't given 4794 --secure-plt and we never see REL16 relocs. */ 4795 if (plt_type == PLT_UNSET) 4796 plt_type = PLT_OLD; 4797 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next) 4798 if (is_ppc_elf (ibfd)) 4799 { 4800 if (ppc_elf_tdata (ibfd)->has_rel16) 4801 plt_type = PLT_NEW; 4802 else if (ppc_elf_tdata (ibfd)->makes_plt_call) 4803 { 4804 plt_type = PLT_OLD; 4805 htab->old_bfd = ibfd; 4806 break; 4807 } 4808 } 4809 htab->plt_type = plt_type; 4810 } 4811 } 4812 if (htab->plt_type == PLT_OLD && plt_style == PLT_NEW) 4813 { 4814 if (htab->old_bfd != NULL) 4815 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"), 4816 htab->old_bfd); 4817 else 4818 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n")); 4819 } 4820 4821 BFD_ASSERT (htab->plt_type != PLT_VXWORKS); 4822 4823 if (htab->plt_type == PLT_NEW) 4824 { 4825 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS 4826 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 4827 4828 /* The new PLT is a loaded section. */ 4829 if (htab->plt != NULL 4830 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags)) 4831 return -1; 4832 4833 /* The new GOT is not executable. */ 4834 if (htab->got != NULL 4835 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags)) 4836 return -1; 4837 } 4838 else 4839 { 4840 /* Stop an unused .glink section from affecting .text alignment. */ 4841 if (htab->glink != NULL 4842 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0)) 4843 return -1; 4844 } 4845 return htab->plt_type == PLT_NEW; 4846 } 4847 4848 /* Return the section that should be marked against GC for a given 4849 relocation. */ 4850 4851 static asection * 4852 ppc_elf_gc_mark_hook (asection *sec, 4853 struct bfd_link_info *info, 4854 Elf_Internal_Rela *rel, 4855 struct elf_link_hash_entry *h, 4856 Elf_Internal_Sym *sym) 4857 { 4858 if (h != NULL) 4859 switch (ELF32_R_TYPE (rel->r_info)) 4860 { 4861 case R_PPC_GNU_VTINHERIT: 4862 case R_PPC_GNU_VTENTRY: 4863 return NULL; 4864 } 4865 4866 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 4867 } 4868 4869 /* Update the got, plt and dynamic reloc reference counts for the 4870 section being removed. */ 4871 4872 static bfd_boolean 4873 ppc_elf_gc_sweep_hook (bfd *abfd, 4874 struct bfd_link_info *info, 4875 asection *sec, 4876 const Elf_Internal_Rela *relocs) 4877 { 4878 struct ppc_elf_link_hash_table *htab; 4879 Elf_Internal_Shdr *symtab_hdr; 4880 struct elf_link_hash_entry **sym_hashes; 4881 bfd_signed_vma *local_got_refcounts; 4882 const Elf_Internal_Rela *rel, *relend; 4883 asection *got2; 4884 4885 if (info->relocatable) 4886 return TRUE; 4887 4888 if ((sec->flags & SEC_ALLOC) == 0) 4889 return TRUE; 4890 4891 elf_section_data (sec)->local_dynrel = NULL; 4892 4893 htab = ppc_elf_hash_table (info); 4894 symtab_hdr = &elf_symtab_hdr (abfd); 4895 sym_hashes = elf_sym_hashes (abfd); 4896 local_got_refcounts = elf_local_got_refcounts (abfd); 4897 got2 = bfd_get_section_by_name (abfd, ".got2"); 4898 4899 relend = relocs + sec->reloc_count; 4900 for (rel = relocs; rel < relend; rel++) 4901 { 4902 unsigned long r_symndx; 4903 enum elf_ppc_reloc_type r_type; 4904 struct elf_link_hash_entry *h = NULL; 4905 4906 r_symndx = ELF32_R_SYM (rel->r_info); 4907 if (r_symndx >= symtab_hdr->sh_info) 4908 { 4909 struct elf_dyn_relocs **pp, *p; 4910 struct ppc_elf_link_hash_entry *eh; 4911 4912 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 4913 while (h->root.type == bfd_link_hash_indirect 4914 || h->root.type == bfd_link_hash_warning) 4915 h = (struct elf_link_hash_entry *) h->root.u.i.link; 4916 eh = (struct ppc_elf_link_hash_entry *) h; 4917 4918 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) 4919 if (p->sec == sec) 4920 { 4921 /* Everything must go for SEC. */ 4922 *pp = p->next; 4923 break; 4924 } 4925 } 4926 4927 r_type = ELF32_R_TYPE (rel->r_info); 4928 if (!htab->is_vxworks 4929 && h == NULL 4930 && local_got_refcounts != NULL 4931 && (!info->shared 4932 || is_branch_reloc (r_type))) 4933 { 4934 struct plt_entry **local_plt = (struct plt_entry **) 4935 (local_got_refcounts + symtab_hdr->sh_info); 4936 char *local_got_tls_masks = (char *) 4937 (local_plt + symtab_hdr->sh_info); 4938 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0) 4939 { 4940 struct plt_entry **ifunc = local_plt + r_symndx; 4941 bfd_vma addend = 0; 4942 struct plt_entry *ent; 4943 4944 if (r_type == R_PPC_PLTREL24 && info->shared) 4945 addend = rel->r_addend; 4946 ent = find_plt_ent (ifunc, got2, addend); 4947 if (ent->plt.refcount > 0) 4948 ent->plt.refcount -= 1; 4949 continue; 4950 } 4951 } 4952 4953 switch (r_type) 4954 { 4955 case R_PPC_GOT_TLSLD16: 4956 case R_PPC_GOT_TLSLD16_LO: 4957 case R_PPC_GOT_TLSLD16_HI: 4958 case R_PPC_GOT_TLSLD16_HA: 4959 case R_PPC_GOT_TLSGD16: 4960 case R_PPC_GOT_TLSGD16_LO: 4961 case R_PPC_GOT_TLSGD16_HI: 4962 case R_PPC_GOT_TLSGD16_HA: 4963 case R_PPC_GOT_TPREL16: 4964 case R_PPC_GOT_TPREL16_LO: 4965 case R_PPC_GOT_TPREL16_HI: 4966 case R_PPC_GOT_TPREL16_HA: 4967 case R_PPC_GOT_DTPREL16: 4968 case R_PPC_GOT_DTPREL16_LO: 4969 case R_PPC_GOT_DTPREL16_HI: 4970 case R_PPC_GOT_DTPREL16_HA: 4971 case R_PPC_GOT16: 4972 case R_PPC_GOT16_LO: 4973 case R_PPC_GOT16_HI: 4974 case R_PPC_GOT16_HA: 4975 if (h != NULL) 4976 { 4977 if (h->got.refcount > 0) 4978 h->got.refcount--; 4979 if (!info->shared) 4980 { 4981 struct plt_entry *ent; 4982 4983 ent = find_plt_ent (&h->plt.plist, NULL, 0); 4984 if (ent != NULL && ent->plt.refcount > 0) 4985 ent->plt.refcount -= 1; 4986 } 4987 } 4988 else if (local_got_refcounts != NULL) 4989 { 4990 if (local_got_refcounts[r_symndx] > 0) 4991 local_got_refcounts[r_symndx]--; 4992 } 4993 break; 4994 4995 case R_PPC_REL24: 4996 case R_PPC_REL14: 4997 case R_PPC_REL14_BRTAKEN: 4998 case R_PPC_REL14_BRNTAKEN: 4999 case R_PPC_REL32: 5000 if (h == NULL || h == htab->elf.hgot) 5001 break; 5002 /* Fall thru */ 5003 5004 case R_PPC_ADDR32: 5005 case R_PPC_ADDR24: 5006 case R_PPC_ADDR16: 5007 case R_PPC_ADDR16_LO: 5008 case R_PPC_ADDR16_HI: 5009 case R_PPC_ADDR16_HA: 5010 case R_PPC_ADDR14: 5011 case R_PPC_ADDR14_BRTAKEN: 5012 case R_PPC_ADDR14_BRNTAKEN: 5013 case R_PPC_UADDR32: 5014 case R_PPC_UADDR16: 5015 if (info->shared) 5016 break; 5017 5018 case R_PPC_PLT32: 5019 case R_PPC_PLTREL24: 5020 case R_PPC_PLTREL32: 5021 case R_PPC_PLT16_LO: 5022 case R_PPC_PLT16_HI: 5023 case R_PPC_PLT16_HA: 5024 if (h != NULL) 5025 { 5026 bfd_vma addend = 0; 5027 struct plt_entry *ent; 5028 5029 if (r_type == R_PPC_PLTREL24 && info->shared) 5030 addend = rel->r_addend; 5031 ent = find_plt_ent (&h->plt.plist, got2, addend); 5032 if (ent != NULL && ent->plt.refcount > 0) 5033 ent->plt.refcount -= 1; 5034 } 5035 break; 5036 5037 default: 5038 break; 5039 } 5040 } 5041 return TRUE; 5042 } 5043 5044 /* Set plt output section type, htab->tls_get_addr, and call the 5045 generic ELF tls_setup function. */ 5046 5047 asection * 5048 ppc_elf_tls_setup (bfd *obfd, 5049 struct bfd_link_info *info, 5050 int no_tls_get_addr_opt) 5051 { 5052 struct ppc_elf_link_hash_table *htab; 5053 5054 htab = ppc_elf_hash_table (info); 5055 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr", 5056 FALSE, FALSE, TRUE); 5057 if (!no_tls_get_addr_opt) 5058 { 5059 struct elf_link_hash_entry *opt, *tga; 5060 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt", 5061 FALSE, FALSE, TRUE); 5062 if (opt != NULL 5063 && (opt->root.type == bfd_link_hash_defined 5064 || opt->root.type == bfd_link_hash_defweak)) 5065 { 5066 /* If glibc supports an optimized __tls_get_addr call stub, 5067 signalled by the presence of __tls_get_addr_opt, and we'll 5068 be calling __tls_get_addr via a plt call stub, then 5069 make __tls_get_addr point to __tls_get_addr_opt. */ 5070 tga = htab->tls_get_addr; 5071 if (htab->elf.dynamic_sections_created 5072 && tga != NULL 5073 && (tga->type == STT_FUNC 5074 || tga->needs_plt) 5075 && !(SYMBOL_CALLS_LOCAL (info, tga) 5076 || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT 5077 && tga->root.type == bfd_link_hash_undefweak))) 5078 { 5079 struct plt_entry *ent; 5080 for (ent = tga->plt.plist; ent != NULL; ent = ent->next) 5081 if (ent->plt.refcount > 0) 5082 break; 5083 if (ent != NULL) 5084 { 5085 tga->root.type = bfd_link_hash_indirect; 5086 tga->root.u.i.link = &opt->root; 5087 ppc_elf_copy_indirect_symbol (info, opt, tga); 5088 if (opt->dynindx != -1) 5089 { 5090 /* Use __tls_get_addr_opt in dynamic relocations. */ 5091 opt->dynindx = -1; 5092 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, 5093 opt->dynstr_index); 5094 if (!bfd_elf_link_record_dynamic_symbol (info, opt)) 5095 return FALSE; 5096 } 5097 htab->tls_get_addr = opt; 5098 } 5099 } 5100 } 5101 else 5102 no_tls_get_addr_opt = TRUE; 5103 } 5104 htab->no_tls_get_addr_opt = no_tls_get_addr_opt; 5105 if (htab->plt_type == PLT_NEW 5106 && htab->plt != NULL 5107 && htab->plt->output_section != NULL) 5108 { 5109 elf_section_type (htab->plt->output_section) = SHT_PROGBITS; 5110 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE; 5111 } 5112 5113 return _bfd_elf_tls_setup (obfd, info); 5114 } 5115 5116 /* Return TRUE iff REL is a branch reloc with a global symbol matching 5117 HASH. */ 5118 5119 static bfd_boolean 5120 branch_reloc_hash_match (const bfd *ibfd, 5121 const Elf_Internal_Rela *rel, 5122 const struct elf_link_hash_entry *hash) 5123 { 5124 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd); 5125 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info); 5126 unsigned int r_symndx = ELF32_R_SYM (rel->r_info); 5127 5128 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type)) 5129 { 5130 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); 5131 struct elf_link_hash_entry *h; 5132 5133 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 5134 while (h->root.type == bfd_link_hash_indirect 5135 || h->root.type == bfd_link_hash_warning) 5136 h = (struct elf_link_hash_entry *) h->root.u.i.link; 5137 if (h == hash) 5138 return TRUE; 5139 } 5140 return FALSE; 5141 } 5142 5143 /* Run through all the TLS relocs looking for optimization 5144 opportunities. */ 5145 5146 bfd_boolean 5147 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, 5148 struct bfd_link_info *info) 5149 { 5150 bfd *ibfd; 5151 asection *sec; 5152 struct ppc_elf_link_hash_table *htab; 5153 int pass; 5154 5155 if (info->relocatable || !info->executable) 5156 return TRUE; 5157 5158 htab = ppc_elf_hash_table (info); 5159 if (htab == NULL) 5160 return FALSE; 5161 5162 /* Make two passes through the relocs. First time check that tls 5163 relocs involved in setting up a tls_get_addr call are indeed 5164 followed by such a call. If they are not, don't do any tls 5165 optimization. On the second pass twiddle tls_mask flags to 5166 notify relocate_section that optimization can be done, and 5167 adjust got and plt refcounts. */ 5168 for (pass = 0; pass < 2; ++pass) 5169 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) 5170 { 5171 Elf_Internal_Sym *locsyms = NULL; 5172 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd); 5173 asection *got2 = bfd_get_section_by_name (ibfd, ".got2"); 5174 5175 for (sec = ibfd->sections; sec != NULL; sec = sec->next) 5176 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section)) 5177 { 5178 Elf_Internal_Rela *relstart, *rel, *relend; 5179 int expecting_tls_get_addr = 0; 5180 5181 /* Read the relocations. */ 5182 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, 5183 info->keep_memory); 5184 if (relstart == NULL) 5185 return FALSE; 5186 5187 relend = relstart + sec->reloc_count; 5188 for (rel = relstart; rel < relend; rel++) 5189 { 5190 enum elf_ppc_reloc_type r_type; 5191 unsigned long r_symndx; 5192 struct elf_link_hash_entry *h = NULL; 5193 char *tls_mask; 5194 char tls_set, tls_clear; 5195 bfd_boolean is_local; 5196 bfd_signed_vma *got_count; 5197 5198 r_symndx = ELF32_R_SYM (rel->r_info); 5199 if (r_symndx >= symtab_hdr->sh_info) 5200 { 5201 struct elf_link_hash_entry **sym_hashes; 5202 5203 sym_hashes = elf_sym_hashes (ibfd); 5204 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 5205 while (h->root.type == bfd_link_hash_indirect 5206 || h->root.type == bfd_link_hash_warning) 5207 h = (struct elf_link_hash_entry *) h->root.u.i.link; 5208 } 5209 5210 is_local = FALSE; 5211 if (h == NULL 5212 || !h->def_dynamic) 5213 is_local = TRUE; 5214 5215 r_type = ELF32_R_TYPE (rel->r_info); 5216 /* If this section has old-style __tls_get_addr calls 5217 without marker relocs, then check that each 5218 __tls_get_addr call reloc is preceded by a reloc 5219 that conceivably belongs to the __tls_get_addr arg 5220 setup insn. If we don't find matching arg setup 5221 relocs, don't do any tls optimization. */ 5222 if (pass == 0 5223 && sec->has_tls_get_addr_call 5224 && h != NULL 5225 && h == htab->tls_get_addr 5226 && !expecting_tls_get_addr 5227 && is_branch_reloc (r_type)) 5228 { 5229 info->callbacks->minfo ("%H __tls_get_addr lost arg, " 5230 "TLS optimization disabled\n", 5231 ibfd, sec, rel->r_offset); 5232 if (elf_section_data (sec)->relocs != relstart) 5233 free (relstart); 5234 return TRUE; 5235 } 5236 5237 expecting_tls_get_addr = 0; 5238 switch (r_type) 5239 { 5240 case R_PPC_GOT_TLSLD16: 5241 case R_PPC_GOT_TLSLD16_LO: 5242 expecting_tls_get_addr = 1; 5243 /* Fall thru */ 5244 5245 case R_PPC_GOT_TLSLD16_HI: 5246 case R_PPC_GOT_TLSLD16_HA: 5247 /* These relocs should never be against a symbol 5248 defined in a shared lib. Leave them alone if 5249 that turns out to be the case. */ 5250 if (!is_local) 5251 continue; 5252 5253 /* LD -> LE */ 5254 tls_set = 0; 5255 tls_clear = TLS_LD; 5256 break; 5257 5258 case R_PPC_GOT_TLSGD16: 5259 case R_PPC_GOT_TLSGD16_LO: 5260 expecting_tls_get_addr = 1; 5261 /* Fall thru */ 5262 5263 case R_PPC_GOT_TLSGD16_HI: 5264 case R_PPC_GOT_TLSGD16_HA: 5265 if (is_local) 5266 /* GD -> LE */ 5267 tls_set = 0; 5268 else 5269 /* GD -> IE */ 5270 tls_set = TLS_TLS | TLS_TPRELGD; 5271 tls_clear = TLS_GD; 5272 break; 5273 5274 case R_PPC_GOT_TPREL16: 5275 case R_PPC_GOT_TPREL16_LO: 5276 case R_PPC_GOT_TPREL16_HI: 5277 case R_PPC_GOT_TPREL16_HA: 5278 if (is_local) 5279 { 5280 /* IE -> LE */ 5281 tls_set = 0; 5282 tls_clear = TLS_TPREL; 5283 break; 5284 } 5285 else 5286 continue; 5287 5288 case R_PPC_TLSGD: 5289 case R_PPC_TLSLD: 5290 expecting_tls_get_addr = 2; 5291 tls_set = 0; 5292 tls_clear = 0; 5293 break; 5294 5295 default: 5296 continue; 5297 } 5298 5299 if (pass == 0) 5300 { 5301 if (!expecting_tls_get_addr 5302 || (expecting_tls_get_addr == 1 5303 && !sec->has_tls_get_addr_call)) 5304 continue; 5305 5306 if (rel + 1 < relend 5307 && branch_reloc_hash_match (ibfd, rel + 1, 5308 htab->tls_get_addr)) 5309 continue; 5310 5311 /* Uh oh, we didn't find the expected call. We 5312 could just mark this symbol to exclude it 5313 from tls optimization but it's safer to skip 5314 the entire optimization. */ 5315 info->callbacks->minfo (_("%H arg lost __tls_get_addr, " 5316 "TLS optimization disabled\n"), 5317 ibfd, sec, rel->r_offset); 5318 if (elf_section_data (sec)->relocs != relstart) 5319 free (relstart); 5320 return TRUE; 5321 } 5322 5323 if (expecting_tls_get_addr) 5324 { 5325 struct plt_entry *ent; 5326 bfd_vma addend = 0; 5327 5328 if (info->shared 5329 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24) 5330 addend = rel[1].r_addend; 5331 ent = find_plt_ent (&htab->tls_get_addr->plt.plist, 5332 got2, addend); 5333 if (ent != NULL && ent->plt.refcount > 0) 5334 ent->plt.refcount -= 1; 5335 5336 if (expecting_tls_get_addr == 2) 5337 continue; 5338 } 5339 5340 if (h != NULL) 5341 { 5342 tls_mask = &ppc_elf_hash_entry (h)->tls_mask; 5343 got_count = &h->got.refcount; 5344 } 5345 else 5346 { 5347 bfd_signed_vma *lgot_refs; 5348 struct plt_entry **local_plt; 5349 char *lgot_masks; 5350 5351 if (locsyms == NULL) 5352 { 5353 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; 5354 if (locsyms == NULL) 5355 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, 5356 symtab_hdr->sh_info, 5357 0, NULL, NULL, NULL); 5358 if (locsyms == NULL) 5359 { 5360 if (elf_section_data (sec)->relocs != relstart) 5361 free (relstart); 5362 return FALSE; 5363 } 5364 } 5365 lgot_refs = elf_local_got_refcounts (ibfd); 5366 if (lgot_refs == NULL) 5367 abort (); 5368 local_plt = (struct plt_entry **) 5369 (lgot_refs + symtab_hdr->sh_info); 5370 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info); 5371 tls_mask = &lgot_masks[r_symndx]; 5372 got_count = &lgot_refs[r_symndx]; 5373 } 5374 5375 if (tls_set == 0) 5376 { 5377 /* We managed to get rid of a got entry. */ 5378 if (*got_count > 0) 5379 *got_count -= 1; 5380 } 5381 5382 *tls_mask |= tls_set; 5383 *tls_mask &= ~tls_clear; 5384 } 5385 5386 if (elf_section_data (sec)->relocs != relstart) 5387 free (relstart); 5388 } 5389 5390 if (locsyms != NULL 5391 && (symtab_hdr->contents != (unsigned char *) locsyms)) 5392 { 5393 if (!info->keep_memory) 5394 free (locsyms); 5395 else 5396 symtab_hdr->contents = (unsigned char *) locsyms; 5397 } 5398 } 5399 return TRUE; 5400 } 5401 5402 /* Return true if we have dynamic relocs that apply to read-only sections. */ 5403 5404 static bfd_boolean 5405 readonly_dynrelocs (struct elf_link_hash_entry *h) 5406 { 5407 struct elf_dyn_relocs *p; 5408 5409 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next) 5410 { 5411 asection *s = p->sec->output_section; 5412 5413 if (s != NULL 5414 && ((s->flags & (SEC_READONLY | SEC_ALLOC)) 5415 == (SEC_READONLY | SEC_ALLOC))) 5416 return TRUE; 5417 } 5418 return FALSE; 5419 } 5420 5421 /* Adjust a symbol defined by a dynamic object and referenced by a 5422 regular object. The current definition is in some section of the 5423 dynamic object, but we're not including those sections. We have to 5424 change the definition to something the rest of the link can 5425 understand. */ 5426 5427 static bfd_boolean 5428 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info, 5429 struct elf_link_hash_entry *h) 5430 { 5431 struct ppc_elf_link_hash_table *htab; 5432 asection *s; 5433 5434 #ifdef DEBUG 5435 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n", 5436 h->root.root.string); 5437 #endif 5438 5439 /* Make sure we know what is going on here. */ 5440 htab = ppc_elf_hash_table (info); 5441 BFD_ASSERT (htab->elf.dynobj != NULL 5442 && (h->needs_plt 5443 || h->type == STT_GNU_IFUNC 5444 || h->u.weakdef != NULL 5445 || (h->def_dynamic 5446 && h->ref_regular 5447 && !h->def_regular))); 5448 5449 /* Deal with function syms. */ 5450 if (h->type == STT_FUNC 5451 || h->type == STT_GNU_IFUNC 5452 || h->needs_plt) 5453 { 5454 /* Clear procedure linkage table information for any symbol that 5455 won't need a .plt entry. */ 5456 struct plt_entry *ent; 5457 for (ent = h->plt.plist; ent != NULL; ent = ent->next) 5458 if (ent->plt.refcount > 0) 5459 break; 5460 if (ent == NULL 5461 || (h->type != STT_GNU_IFUNC 5462 && (SYMBOL_CALLS_LOCAL (info, h) 5463 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 5464 && h->root.type == bfd_link_hash_undefweak)))) 5465 { 5466 /* A PLT entry is not required/allowed when: 5467 5468 1. We are not using ld.so; because then the PLT entry 5469 can't be set up, so we can't use one. In this case, 5470 ppc_elf_adjust_dynamic_symbol won't even be called. 5471 5472 2. GC has rendered the entry unused. 5473 5474 3. We know for certain that a call to this symbol 5475 will go to this object, or will remain undefined. */ 5476 h->plt.plist = NULL; 5477 h->needs_plt = 0; 5478 } 5479 else 5480 { 5481 /* After adjust_dynamic_symbol, non_got_ref set in the 5482 non-shared case means that we have allocated space in 5483 .dynbss for the symbol and thus dyn_relocs for this 5484 symbol should be discarded. 5485 If we get here we know we are making a PLT entry for this 5486 symbol, and in an executable we'd normally resolve 5487 relocations against this symbol to the PLT entry. Allow 5488 dynamic relocs if the reference is weak, and the dynamic 5489 relocs will not cause text relocation. */ 5490 if (!h->ref_regular_nonweak 5491 && h->non_got_ref 5492 && h->type != STT_GNU_IFUNC 5493 && !htab->is_vxworks 5494 && !ppc_elf_hash_entry (h)->has_sda_refs 5495 && !readonly_dynrelocs (h)) 5496 h->non_got_ref = 0; 5497 } 5498 return TRUE; 5499 } 5500 else 5501 h->plt.plist = NULL; 5502 5503 /* If this is a weak symbol, and there is a real definition, the 5504 processor independent code will have arranged for us to see the 5505 real definition first, and we can just use the same value. */ 5506 if (h->u.weakdef != NULL) 5507 { 5508 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined 5509 || h->u.weakdef->root.type == bfd_link_hash_defweak); 5510 h->root.u.def.section = h->u.weakdef->root.u.def.section; 5511 h->root.u.def.value = h->u.weakdef->root.u.def.value; 5512 if (ELIMINATE_COPY_RELOCS) 5513 h->non_got_ref = h->u.weakdef->non_got_ref; 5514 return TRUE; 5515 } 5516 5517 /* This is a reference to a symbol defined by a dynamic object which 5518 is not a function. */ 5519 5520 /* If we are creating a shared library, we must presume that the 5521 only references to the symbol are via the global offset table. 5522 For such cases we need not do anything here; the relocations will 5523 be handled correctly by relocate_section. */ 5524 if (info->shared) 5525 return TRUE; 5526 5527 /* If there are no references to this symbol that do not use the 5528 GOT, we don't need to generate a copy reloc. */ 5529 if (!h->non_got_ref) 5530 return TRUE; 5531 5532 /* If we didn't find any dynamic relocs in read-only sections, then 5533 we'll be keeping the dynamic relocs and avoiding the copy reloc. 5534 We can't do this if there are any small data relocations. This 5535 doesn't work on VxWorks, where we can not have dynamic 5536 relocations (other than copy and jump slot relocations) in an 5537 executable. */ 5538 if (ELIMINATE_COPY_RELOCS 5539 && !ppc_elf_hash_entry (h)->has_sda_refs 5540 && !htab->is_vxworks 5541 && !h->def_regular 5542 && !readonly_dynrelocs (h)) 5543 { 5544 h->non_got_ref = 0; 5545 return TRUE; 5546 } 5547 5548 /* We must allocate the symbol in our .dynbss section, which will 5549 become part of the .bss section of the executable. There will be 5550 an entry for this symbol in the .dynsym section. The dynamic 5551 object will contain position independent code, so all references 5552 from the dynamic object to this symbol will go through the global 5553 offset table. The dynamic linker will use the .dynsym entry to 5554 determine the address it must put in the global offset table, so 5555 both the dynamic object and the regular object will refer to the 5556 same memory location for the variable. 5557 5558 Of course, if the symbol is referenced using SDAREL relocs, we 5559 must instead allocate it in .sbss. */ 5560 5561 if (ppc_elf_hash_entry (h)->has_sda_refs) 5562 s = htab->dynsbss; 5563 else 5564 s = htab->dynbss; 5565 BFD_ASSERT (s != NULL); 5566 5567 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to 5568 copy the initial value out of the dynamic object and into the 5569 runtime process image. We need to remember the offset into the 5570 .rela.bss section we are going to use. */ 5571 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) 5572 { 5573 asection *srel; 5574 5575 if (ppc_elf_hash_entry (h)->has_sda_refs) 5576 srel = htab->relsbss; 5577 else 5578 srel = htab->relbss; 5579 BFD_ASSERT (srel != NULL); 5580 srel->size += sizeof (Elf32_External_Rela); 5581 h->needs_copy = 1; 5582 } 5583 5584 return _bfd_elf_adjust_dynamic_copy (h, s); 5585 } 5586 5587 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is 5588 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0, 5589 specifying the addend on the plt relocation. For -fpic code, the sym 5590 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC 5591 xxxxxxxx.got2.plt_pic32.<callee>. */ 5592 5593 static bfd_boolean 5594 add_stub_sym (struct plt_entry *ent, 5595 struct elf_link_hash_entry *h, 5596 struct bfd_link_info *info) 5597 { 5598 struct elf_link_hash_entry *sh; 5599 size_t len1, len2, len3; 5600 char *name; 5601 const char *stub; 5602 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 5603 5604 if (info->shared) 5605 stub = ".plt_pic32."; 5606 else 5607 stub = ".plt_call32."; 5608 5609 len1 = strlen (h->root.root.string); 5610 len2 = strlen (stub); 5611 len3 = 0; 5612 if (ent->sec) 5613 len3 = strlen (ent->sec->name); 5614 name = bfd_malloc (len1 + len2 + len3 + 9); 5615 if (name == NULL) 5616 return FALSE; 5617 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff); 5618 if (ent->sec) 5619 memcpy (name + 8, ent->sec->name, len3); 5620 memcpy (name + 8 + len3, stub, len2); 5621 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1); 5622 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE); 5623 if (sh == NULL) 5624 return FALSE; 5625 if (sh->root.type == bfd_link_hash_new) 5626 { 5627 sh->root.type = bfd_link_hash_defined; 5628 sh->root.u.def.section = htab->glink; 5629 sh->root.u.def.value = ent->glink_offset; 5630 sh->ref_regular = 1; 5631 sh->def_regular = 1; 5632 sh->ref_regular_nonweak = 1; 5633 sh->forced_local = 1; 5634 sh->non_elf = 0; 5635 } 5636 return TRUE; 5637 } 5638 5639 /* Allocate NEED contiguous space in .got, and return the offset. 5640 Handles allocation of the got header when crossing 32k. */ 5641 5642 static bfd_vma 5643 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need) 5644 { 5645 bfd_vma where; 5646 unsigned int max_before_header; 5647 5648 if (htab->plt_type == PLT_VXWORKS) 5649 { 5650 where = htab->got->size; 5651 htab->got->size += need; 5652 } 5653 else 5654 { 5655 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764; 5656 if (need <= htab->got_gap) 5657 { 5658 where = max_before_header - htab->got_gap; 5659 htab->got_gap -= need; 5660 } 5661 else 5662 { 5663 if (htab->got->size + need > max_before_header 5664 && htab->got->size <= max_before_header) 5665 { 5666 htab->got_gap = max_before_header - htab->got->size; 5667 htab->got->size = max_before_header + htab->got_header_size; 5668 } 5669 where = htab->got->size; 5670 htab->got->size += need; 5671 } 5672 } 5673 return where; 5674 } 5675 5676 /* Allocate space in associated reloc sections for dynamic relocs. */ 5677 5678 static bfd_boolean 5679 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) 5680 { 5681 struct bfd_link_info *info = inf; 5682 struct ppc_elf_link_hash_entry *eh; 5683 struct ppc_elf_link_hash_table *htab; 5684 struct elf_dyn_relocs *p; 5685 5686 if (h->root.type == bfd_link_hash_indirect) 5687 return TRUE; 5688 5689 htab = ppc_elf_hash_table (info); 5690 if (htab->elf.dynamic_sections_created 5691 || h->type == STT_GNU_IFUNC) 5692 { 5693 struct plt_entry *ent; 5694 bfd_boolean doneone = FALSE; 5695 bfd_vma plt_offset = 0, glink_offset = 0; 5696 bfd_boolean dyn; 5697 5698 for (ent = h->plt.plist; ent != NULL; ent = ent->next) 5699 if (ent->plt.refcount > 0) 5700 { 5701 /* Make sure this symbol is output as a dynamic symbol. */ 5702 if (h->dynindx == -1 5703 && !h->forced_local 5704 && !h->def_regular 5705 && htab->elf.dynamic_sections_created) 5706 { 5707 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 5708 return FALSE; 5709 } 5710 5711 dyn = htab->elf.dynamic_sections_created; 5712 if (info->shared 5713 || h->type == STT_GNU_IFUNC 5714 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)) 5715 { 5716 asection *s = htab->plt; 5717 if (!dyn || h->dynindx == -1) 5718 s = htab->iplt; 5719 5720 if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1) 5721 { 5722 if (!doneone) 5723 { 5724 plt_offset = s->size; 5725 s->size += 4; 5726 } 5727 ent->plt.offset = plt_offset; 5728 5729 s = htab->glink; 5730 if (!doneone || info->shared) 5731 { 5732 glink_offset = s->size; 5733 s->size += GLINK_ENTRY_SIZE; 5734 if (h == htab->tls_get_addr 5735 && !htab->no_tls_get_addr_opt) 5736 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE; 5737 } 5738 if (!doneone 5739 && !info->shared 5740 && h->def_dynamic 5741 && !h->def_regular) 5742 { 5743 h->root.u.def.section = s; 5744 h->root.u.def.value = glink_offset; 5745 } 5746 ent->glink_offset = glink_offset; 5747 5748 if (htab->emit_stub_syms 5749 && !add_stub_sym (ent, h, info)) 5750 return FALSE; 5751 } 5752 else 5753 { 5754 if (!doneone) 5755 { 5756 /* If this is the first .plt entry, make room 5757 for the special first entry. */ 5758 if (s->size == 0) 5759 s->size += htab->plt_initial_entry_size; 5760 5761 /* The PowerPC PLT is actually composed of two 5762 parts, the first part is 2 words (for a load 5763 and a jump), and then there is a remaining 5764 word available at the end. */ 5765 plt_offset = (htab->plt_initial_entry_size 5766 + (htab->plt_slot_size 5767 * ((s->size 5768 - htab->plt_initial_entry_size) 5769 / htab->plt_entry_size))); 5770 5771 /* If this symbol is not defined in a regular 5772 file, and we are not generating a shared 5773 library, then set the symbol to this location 5774 in the .plt. This is to avoid text 5775 relocations, and is required to make 5776 function pointers compare as equal between 5777 the normal executable and the shared library. */ 5778 if (! info->shared 5779 && h->def_dynamic 5780 && !h->def_regular) 5781 { 5782 h->root.u.def.section = s; 5783 h->root.u.def.value = plt_offset; 5784 } 5785 5786 /* Make room for this entry. */ 5787 s->size += htab->plt_entry_size; 5788 /* After the 8192nd entry, room for two entries 5789 is allocated. */ 5790 if (htab->plt_type == PLT_OLD 5791 && (s->size - htab->plt_initial_entry_size) 5792 / htab->plt_entry_size 5793 > PLT_NUM_SINGLE_ENTRIES) 5794 s->size += htab->plt_entry_size; 5795 } 5796 ent->plt.offset = plt_offset; 5797 } 5798 5799 /* We also need to make an entry in the .rela.plt section. */ 5800 if (!doneone) 5801 { 5802 if (!htab->elf.dynamic_sections_created 5803 || h->dynindx == -1) 5804 htab->reliplt->size += sizeof (Elf32_External_Rela); 5805 else 5806 { 5807 htab->relplt->size += sizeof (Elf32_External_Rela); 5808 5809 if (htab->plt_type == PLT_VXWORKS) 5810 { 5811 /* Allocate space for the unloaded relocations. */ 5812 if (!info->shared 5813 && htab->elf.dynamic_sections_created) 5814 { 5815 if (ent->plt.offset 5816 == (bfd_vma) htab->plt_initial_entry_size) 5817 { 5818 htab->srelplt2->size 5819 += (sizeof (Elf32_External_Rela) 5820 * VXWORKS_PLTRESOLVE_RELOCS); 5821 } 5822 5823 htab->srelplt2->size 5824 += (sizeof (Elf32_External_Rela) 5825 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS); 5826 } 5827 5828 /* Every PLT entry has an associated GOT entry in 5829 .got.plt. */ 5830 htab->sgotplt->size += 4; 5831 } 5832 } 5833 doneone = TRUE; 5834 } 5835 } 5836 else 5837 ent->plt.offset = (bfd_vma) -1; 5838 } 5839 else 5840 ent->plt.offset = (bfd_vma) -1; 5841 5842 if (!doneone) 5843 { 5844 h->plt.plist = NULL; 5845 h->needs_plt = 0; 5846 } 5847 } 5848 else 5849 { 5850 h->plt.plist = NULL; 5851 h->needs_plt = 0; 5852 } 5853 5854 eh = (struct ppc_elf_link_hash_entry *) h; 5855 if (eh->elf.got.refcount > 0) 5856 { 5857 bfd_boolean dyn; 5858 unsigned int need; 5859 5860 /* Make sure this symbol is output as a dynamic symbol. */ 5861 if (eh->elf.dynindx == -1 5862 && !eh->elf.forced_local 5863 && eh->elf.type != STT_GNU_IFUNC 5864 && htab->elf.dynamic_sections_created) 5865 { 5866 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf)) 5867 return FALSE; 5868 } 5869 5870 need = 0; 5871 if ((eh->tls_mask & TLS_TLS) != 0) 5872 { 5873 if ((eh->tls_mask & TLS_LD) != 0) 5874 { 5875 if (!eh->elf.def_dynamic) 5876 /* We'll just use htab->tlsld_got.offset. This should 5877 always be the case. It's a little odd if we have 5878 a local dynamic reloc against a non-local symbol. */ 5879 htab->tlsld_got.refcount += 1; 5880 else 5881 need += 8; 5882 } 5883 if ((eh->tls_mask & TLS_GD) != 0) 5884 need += 8; 5885 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0) 5886 need += 4; 5887 if ((eh->tls_mask & TLS_DTPREL) != 0) 5888 need += 4; 5889 } 5890 else 5891 need += 4; 5892 if (need == 0) 5893 eh->elf.got.offset = (bfd_vma) -1; 5894 else 5895 { 5896 eh->elf.got.offset = allocate_got (htab, need); 5897 dyn = htab->elf.dynamic_sections_created; 5898 if ((info->shared 5899 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf)) 5900 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT 5901 || eh->elf.root.type != bfd_link_hash_undefweak)) 5902 { 5903 asection *rsec = htab->relgot; 5904 /* All the entries we allocated need relocs. 5905 Except LD only needs one. */ 5906 if ((eh->tls_mask & TLS_LD) != 0 5907 && eh->elf.def_dynamic) 5908 need -= 4; 5909 rsec->size += need * (sizeof (Elf32_External_Rela) / 4); 5910 } 5911 } 5912 } 5913 else 5914 eh->elf.got.offset = (bfd_vma) -1; 5915 5916 if (eh->dyn_relocs == NULL 5917 || !htab->elf.dynamic_sections_created) 5918 return TRUE; 5919 5920 /* In the shared -Bsymbolic case, discard space allocated for 5921 dynamic pc-relative relocs against symbols which turn out to be 5922 defined in regular objects. For the normal shared case, discard 5923 space for relocs that have become local due to symbol visibility 5924 changes. */ 5925 5926 if (info->shared) 5927 { 5928 /* Relocs that use pc_count are those that appear on a call insn, 5929 or certain REL relocs (see must_be_dyn_reloc) that can be 5930 generated via assembly. We want calls to protected symbols to 5931 resolve directly to the function rather than going via the plt. 5932 If people want function pointer comparisons to work as expected 5933 then they should avoid writing weird assembly. */ 5934 if (SYMBOL_CALLS_LOCAL (info, h)) 5935 { 5936 struct elf_dyn_relocs **pp; 5937 5938 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) 5939 { 5940 p->count -= p->pc_count; 5941 p->pc_count = 0; 5942 if (p->count == 0) 5943 *pp = p->next; 5944 else 5945 pp = &p->next; 5946 } 5947 } 5948 5949 if (htab->is_vxworks) 5950 { 5951 struct elf_dyn_relocs **pp; 5952 5953 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) 5954 { 5955 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0) 5956 *pp = p->next; 5957 else 5958 pp = &p->next; 5959 } 5960 } 5961 5962 /* Discard relocs on undefined symbols that must be local. */ 5963 if (eh->dyn_relocs != NULL 5964 && h->root.type == bfd_link_hash_undefined 5965 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN 5966 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL)) 5967 eh->dyn_relocs = NULL; 5968 5969 /* Also discard relocs on undefined weak syms with non-default 5970 visibility. */ 5971 if (eh->dyn_relocs != NULL 5972 && h->root.type == bfd_link_hash_undefweak) 5973 { 5974 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 5975 eh->dyn_relocs = NULL; 5976 5977 /* Make sure undefined weak symbols are output as a dynamic 5978 symbol in PIEs. */ 5979 else if (h->dynindx == -1 5980 && !h->forced_local 5981 && !h->def_regular) 5982 { 5983 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 5984 return FALSE; 5985 } 5986 } 5987 } 5988 else if (ELIMINATE_COPY_RELOCS) 5989 { 5990 /* For the non-shared case, discard space for relocs against 5991 symbols which turn out to need copy relocs or are not 5992 dynamic. */ 5993 5994 if (!h->non_got_ref 5995 && !h->def_regular) 5996 { 5997 /* Make sure this symbol is output as a dynamic symbol. 5998 Undefined weak syms won't yet be marked as dynamic. */ 5999 if (h->dynindx == -1 6000 && !h->forced_local) 6001 { 6002 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 6003 return FALSE; 6004 } 6005 6006 /* If that succeeded, we know we'll be keeping all the 6007 relocs. */ 6008 if (h->dynindx != -1) 6009 goto keep; 6010 } 6011 6012 eh->dyn_relocs = NULL; 6013 6014 keep: ; 6015 } 6016 6017 /* Finally, allocate space. */ 6018 for (p = eh->dyn_relocs; p != NULL; p = p->next) 6019 { 6020 asection *sreloc = elf_section_data (p->sec)->sreloc; 6021 if (!htab->elf.dynamic_sections_created) 6022 sreloc = htab->reliplt; 6023 sreloc->size += p->count * sizeof (Elf32_External_Rela); 6024 } 6025 6026 return TRUE; 6027 } 6028 6029 /* Set DF_TEXTREL if we find any dynamic relocs that apply to 6030 read-only sections. */ 6031 6032 static bfd_boolean 6033 maybe_set_textrel (struct elf_link_hash_entry *h, void *info) 6034 { 6035 if (h->root.type == bfd_link_hash_indirect) 6036 return TRUE; 6037 6038 if (readonly_dynrelocs (h)) 6039 { 6040 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL; 6041 6042 /* Not an error, just cut short the traversal. */ 6043 return FALSE; 6044 } 6045 return TRUE; 6046 } 6047 6048 static const unsigned char glink_eh_frame_cie[] = 6049 { 6050 0, 0, 0, 16, /* length. */ 6051 0, 0, 0, 0, /* id. */ 6052 1, /* CIE version. */ 6053 'z', 'R', 0, /* Augmentation string. */ 6054 4, /* Code alignment. */ 6055 0x7c, /* Data alignment. */ 6056 65, /* RA reg. */ 6057 1, /* Augmentation size. */ 6058 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */ 6059 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */ 6060 }; 6061 6062 /* Set the sizes of the dynamic sections. */ 6063 6064 static bfd_boolean 6065 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, 6066 struct bfd_link_info *info) 6067 { 6068 struct ppc_elf_link_hash_table *htab; 6069 asection *s; 6070 bfd_boolean relocs; 6071 bfd *ibfd; 6072 6073 #ifdef DEBUG 6074 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n"); 6075 #endif 6076 6077 htab = ppc_elf_hash_table (info); 6078 BFD_ASSERT (htab->elf.dynobj != NULL); 6079 6080 if (elf_hash_table (info)->dynamic_sections_created) 6081 { 6082 /* Set the contents of the .interp section to the interpreter. */ 6083 if (info->executable) 6084 { 6085 s = bfd_get_linker_section (htab->elf.dynobj, ".interp"); 6086 BFD_ASSERT (s != NULL); 6087 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 6088 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 6089 } 6090 } 6091 6092 if (htab->plt_type == PLT_OLD) 6093 htab->got_header_size = 16; 6094 else if (htab->plt_type == PLT_NEW) 6095 htab->got_header_size = 12; 6096 6097 /* Set up .got offsets for local syms, and space for local dynamic 6098 relocs. */ 6099 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) 6100 { 6101 bfd_signed_vma *local_got; 6102 bfd_signed_vma *end_local_got; 6103 struct plt_entry **local_plt; 6104 struct plt_entry **end_local_plt; 6105 char *lgot_masks; 6106 bfd_size_type locsymcount; 6107 Elf_Internal_Shdr *symtab_hdr; 6108 6109 if (!is_ppc_elf (ibfd)) 6110 continue; 6111 6112 for (s = ibfd->sections; s != NULL; s = s->next) 6113 { 6114 struct elf_dyn_relocs *p; 6115 6116 for (p = ((struct elf_dyn_relocs *) 6117 elf_section_data (s)->local_dynrel); 6118 p != NULL; 6119 p = p->next) 6120 { 6121 if (!bfd_is_abs_section (p->sec) 6122 && bfd_is_abs_section (p->sec->output_section)) 6123 { 6124 /* Input section has been discarded, either because 6125 it is a copy of a linkonce section or due to 6126 linker script /DISCARD/, so we'll be discarding 6127 the relocs too. */ 6128 } 6129 else if (htab->is_vxworks 6130 && strcmp (p->sec->output_section->name, 6131 ".tls_vars") == 0) 6132 { 6133 /* Relocations in vxworks .tls_vars sections are 6134 handled specially by the loader. */ 6135 } 6136 else if (p->count != 0) 6137 { 6138 asection *sreloc = elf_section_data (p->sec)->sreloc; 6139 if (!htab->elf.dynamic_sections_created) 6140 sreloc = htab->reliplt; 6141 sreloc->size += p->count * sizeof (Elf32_External_Rela); 6142 if ((p->sec->output_section->flags 6143 & (SEC_READONLY | SEC_ALLOC)) 6144 == (SEC_READONLY | SEC_ALLOC)) 6145 info->flags |= DF_TEXTREL; 6146 } 6147 } 6148 } 6149 6150 local_got = elf_local_got_refcounts (ibfd); 6151 if (!local_got) 6152 continue; 6153 6154 symtab_hdr = &elf_symtab_hdr (ibfd); 6155 locsymcount = symtab_hdr->sh_info; 6156 end_local_got = local_got + locsymcount; 6157 local_plt = (struct plt_entry **) end_local_got; 6158 end_local_plt = local_plt + locsymcount; 6159 lgot_masks = (char *) end_local_plt; 6160 6161 for (; local_got < end_local_got; ++local_got, ++lgot_masks) 6162 if (*local_got > 0) 6163 { 6164 unsigned int need = 0; 6165 if ((*lgot_masks & TLS_TLS) != 0) 6166 { 6167 if ((*lgot_masks & TLS_GD) != 0) 6168 need += 8; 6169 if ((*lgot_masks & TLS_LD) != 0) 6170 htab->tlsld_got.refcount += 1; 6171 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0) 6172 need += 4; 6173 if ((*lgot_masks & TLS_DTPREL) != 0) 6174 need += 4; 6175 } 6176 else 6177 need += 4; 6178 if (need == 0) 6179 *local_got = (bfd_vma) -1; 6180 else 6181 { 6182 *local_got = allocate_got (htab, need); 6183 if (info->shared) 6184 htab->relgot->size += (need 6185 * (sizeof (Elf32_External_Rela) / 4)); 6186 } 6187 } 6188 else 6189 *local_got = (bfd_vma) -1; 6190 6191 if (htab->is_vxworks) 6192 continue; 6193 6194 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */ 6195 for (; local_plt < end_local_plt; ++local_plt) 6196 { 6197 struct plt_entry *ent; 6198 bfd_boolean doneone = FALSE; 6199 bfd_vma plt_offset = 0, glink_offset = 0; 6200 6201 for (ent = *local_plt; ent != NULL; ent = ent->next) 6202 if (ent->plt.refcount > 0) 6203 { 6204 s = htab->iplt; 6205 6206 if (!doneone) 6207 { 6208 plt_offset = s->size; 6209 s->size += 4; 6210 } 6211 ent->plt.offset = plt_offset; 6212 6213 s = htab->glink; 6214 if (!doneone || info->shared) 6215 { 6216 glink_offset = s->size; 6217 s->size += GLINK_ENTRY_SIZE; 6218 } 6219 ent->glink_offset = glink_offset; 6220 6221 if (!doneone) 6222 { 6223 htab->reliplt->size += sizeof (Elf32_External_Rela); 6224 doneone = TRUE; 6225 } 6226 } 6227 else 6228 ent->plt.offset = (bfd_vma) -1; 6229 } 6230 } 6231 6232 /* Allocate space for global sym dynamic relocs. */ 6233 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info); 6234 6235 if (htab->tlsld_got.refcount > 0) 6236 { 6237 htab->tlsld_got.offset = allocate_got (htab, 8); 6238 if (info->shared) 6239 htab->relgot->size += sizeof (Elf32_External_Rela); 6240 } 6241 else 6242 htab->tlsld_got.offset = (bfd_vma) -1; 6243 6244 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS) 6245 { 6246 unsigned int g_o_t = 32768; 6247 6248 /* If we haven't allocated the header, do so now. When we get here, 6249 for old plt/got the got size will be 0 to 32764 (not allocated), 6250 or 32780 to 65536 (header allocated). For new plt/got, the 6251 corresponding ranges are 0 to 32768 and 32780 to 65536. */ 6252 if (htab->got->size <= 32768) 6253 { 6254 g_o_t = htab->got->size; 6255 if (htab->plt_type == PLT_OLD) 6256 g_o_t += 4; 6257 htab->got->size += htab->got_header_size; 6258 } 6259 6260 htab->elf.hgot->root.u.def.value = g_o_t; 6261 } 6262 if (info->shared) 6263 { 6264 struct elf_link_hash_entry *sda = htab->sdata[0].sym; 6265 if (sda != NULL 6266 && !(sda->root.type == bfd_link_hash_defined 6267 || sda->root.type == bfd_link_hash_defweak)) 6268 { 6269 sda->root.type = bfd_link_hash_defined; 6270 sda->root.u.def.section = htab->elf.hgot->root.u.def.section; 6271 sda->root.u.def.value = htab->elf.hgot->root.u.def.value; 6272 } 6273 } 6274 6275 if (htab->glink != NULL 6276 && htab->glink->size != 0 6277 && htab->elf.dynamic_sections_created) 6278 { 6279 htab->glink_pltresolve = htab->glink->size; 6280 /* Space for the branch table. */ 6281 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4; 6282 /* Pad out to align the start of PLTresolve. */ 6283 htab->glink->size += -htab->glink->size & 15; 6284 htab->glink->size += GLINK_PLTRESOLVE; 6285 6286 if (htab->emit_stub_syms) 6287 { 6288 struct elf_link_hash_entry *sh; 6289 sh = elf_link_hash_lookup (&htab->elf, "__glink", 6290 TRUE, FALSE, FALSE); 6291 if (sh == NULL) 6292 return FALSE; 6293 if (sh->root.type == bfd_link_hash_new) 6294 { 6295 sh->root.type = bfd_link_hash_defined; 6296 sh->root.u.def.section = htab->glink; 6297 sh->root.u.def.value = htab->glink_pltresolve; 6298 sh->ref_regular = 1; 6299 sh->def_regular = 1; 6300 sh->ref_regular_nonweak = 1; 6301 sh->forced_local = 1; 6302 sh->non_elf = 0; 6303 } 6304 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve", 6305 TRUE, FALSE, FALSE); 6306 if (sh == NULL) 6307 return FALSE; 6308 if (sh->root.type == bfd_link_hash_new) 6309 { 6310 sh->root.type = bfd_link_hash_defined; 6311 sh->root.u.def.section = htab->glink; 6312 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE; 6313 sh->ref_regular = 1; 6314 sh->def_regular = 1; 6315 sh->ref_regular_nonweak = 1; 6316 sh->forced_local = 1; 6317 sh->non_elf = 0; 6318 } 6319 } 6320 } 6321 6322 if (htab->glink != NULL 6323 && htab->glink->size != 0 6324 && htab->glink_eh_frame != NULL 6325 && !bfd_is_abs_section (htab->glink_eh_frame->output_section) 6326 && _bfd_elf_eh_frame_present (info)) 6327 { 6328 s = htab->glink_eh_frame; 6329 s->size = sizeof (glink_eh_frame_cie) + 20; 6330 if (info->shared) 6331 { 6332 s->size += 4; 6333 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256) 6334 s->size += 4; 6335 } 6336 } 6337 6338 /* We've now determined the sizes of the various dynamic sections. 6339 Allocate memory for them. */ 6340 relocs = FALSE; 6341 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next) 6342 { 6343 bfd_boolean strip_section = TRUE; 6344 6345 if ((s->flags & SEC_LINKER_CREATED) == 0) 6346 continue; 6347 6348 if (s == htab->plt 6349 || s == htab->got) 6350 { 6351 /* We'd like to strip these sections if they aren't needed, but if 6352 we've exported dynamic symbols from them we must leave them. 6353 It's too late to tell BFD to get rid of the symbols. */ 6354 if (htab->elf.hplt != NULL) 6355 strip_section = FALSE; 6356 /* Strip this section if we don't need it; see the 6357 comment below. */ 6358 } 6359 else if (s == htab->iplt 6360 || s == htab->glink 6361 || s == htab->glink_eh_frame 6362 || s == htab->sgotplt 6363 || s == htab->sbss 6364 || s == htab->dynbss 6365 || s == htab->dynsbss 6366 || s == htab->sdata[0].section 6367 || s == htab->sdata[1].section) 6368 { 6369 /* Strip these too. */ 6370 } 6371 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s), 6372 ".rela")) 6373 { 6374 if (s->size != 0) 6375 { 6376 /* Remember whether there are any relocation sections. */ 6377 relocs = TRUE; 6378 6379 /* We use the reloc_count field as a counter if we need 6380 to copy relocs into the output file. */ 6381 s->reloc_count = 0; 6382 } 6383 } 6384 else 6385 { 6386 /* It's not one of our sections, so don't allocate space. */ 6387 continue; 6388 } 6389 6390 if (s->size == 0 && strip_section) 6391 { 6392 /* If we don't need this section, strip it from the 6393 output file. This is mostly to handle .rela.bss and 6394 .rela.plt. We must create both sections in 6395 create_dynamic_sections, because they must be created 6396 before the linker maps input sections to output 6397 sections. The linker does that before 6398 adjust_dynamic_symbol is called, and it is that 6399 function which decides whether anything needs to go 6400 into these sections. */ 6401 s->flags |= SEC_EXCLUDE; 6402 continue; 6403 } 6404 6405 if ((s->flags & SEC_HAS_CONTENTS) == 0) 6406 continue; 6407 6408 /* Allocate memory for the section contents. */ 6409 s->contents = bfd_zalloc (htab->elf.dynobj, s->size); 6410 if (s->contents == NULL) 6411 return FALSE; 6412 } 6413 6414 if (htab->elf.dynamic_sections_created) 6415 { 6416 /* Add some entries to the .dynamic section. We fill in the 6417 values later, in ppc_elf_finish_dynamic_sections, but we 6418 must add the entries now so that we get the correct size for 6419 the .dynamic section. The DT_DEBUG entry is filled in by the 6420 dynamic linker and used by the debugger. */ 6421 #define add_dynamic_entry(TAG, VAL) \ 6422 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 6423 6424 if (info->executable) 6425 { 6426 if (!add_dynamic_entry (DT_DEBUG, 0)) 6427 return FALSE; 6428 } 6429 6430 if (htab->plt != NULL && htab->plt->size != 0) 6431 { 6432 if (!add_dynamic_entry (DT_PLTGOT, 0) 6433 || !add_dynamic_entry (DT_PLTRELSZ, 0) 6434 || !add_dynamic_entry (DT_PLTREL, DT_RELA) 6435 || !add_dynamic_entry (DT_JMPREL, 0)) 6436 return FALSE; 6437 } 6438 6439 if (htab->glink != NULL && htab->glink->size != 0) 6440 { 6441 if (!add_dynamic_entry (DT_PPC_GOT, 0)) 6442 return FALSE; 6443 if (!htab->no_tls_get_addr_opt 6444 && htab->tls_get_addr != NULL 6445 && htab->tls_get_addr->plt.plist != NULL 6446 && !add_dynamic_entry (DT_PPC_TLSOPT, 0)) 6447 return FALSE; 6448 } 6449 6450 if (relocs) 6451 { 6452 if (!add_dynamic_entry (DT_RELA, 0) 6453 || !add_dynamic_entry (DT_RELASZ, 0) 6454 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) 6455 return FALSE; 6456 } 6457 6458 /* If any dynamic relocs apply to a read-only section, then we 6459 need a DT_TEXTREL entry. */ 6460 if ((info->flags & DF_TEXTREL) == 0) 6461 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel, 6462 info); 6463 6464 if ((info->flags & DF_TEXTREL) != 0) 6465 { 6466 if (!add_dynamic_entry (DT_TEXTREL, 0)) 6467 return FALSE; 6468 } 6469 if (htab->is_vxworks 6470 && !elf_vxworks_add_dynamic_entries (output_bfd, info)) 6471 return FALSE; 6472 } 6473 #undef add_dynamic_entry 6474 6475 if (htab->glink_eh_frame != NULL 6476 && htab->glink_eh_frame->contents != NULL) 6477 { 6478 unsigned char *p = htab->glink_eh_frame->contents; 6479 bfd_vma val; 6480 6481 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie)); 6482 /* CIE length (rewrite in case little-endian). */ 6483 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p); 6484 p += sizeof (glink_eh_frame_cie); 6485 /* FDE length. */ 6486 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie); 6487 bfd_put_32 (htab->elf.dynobj, val, p); 6488 p += 4; 6489 /* CIE pointer. */ 6490 val = p - htab->glink_eh_frame->contents; 6491 bfd_put_32 (htab->elf.dynobj, val, p); 6492 p += 4; 6493 /* Offset to .glink. Set later. */ 6494 p += 4; 6495 /* .glink size. */ 6496 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p); 6497 p += 4; 6498 /* Augmentation. */ 6499 p += 1; 6500 6501 if (info->shared 6502 && htab->elf.dynamic_sections_created) 6503 { 6504 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2; 6505 if (adv < 64) 6506 *p++ = DW_CFA_advance_loc + adv; 6507 else if (adv < 256) 6508 { 6509 *p++ = DW_CFA_advance_loc1; 6510 *p++ = adv; 6511 } 6512 else if (adv < 65536) 6513 { 6514 *p++ = DW_CFA_advance_loc2; 6515 bfd_put_16 (htab->elf.dynobj, adv, p); 6516 p += 2; 6517 } 6518 else 6519 { 6520 *p++ = DW_CFA_advance_loc4; 6521 bfd_put_32 (htab->elf.dynobj, adv, p); 6522 p += 4; 6523 } 6524 *p++ = DW_CFA_register; 6525 *p++ = 65; 6526 p++; 6527 *p++ = DW_CFA_advance_loc + 4; 6528 *p++ = DW_CFA_restore_extended; 6529 *p++ = 65; 6530 } 6531 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4) 6532 == htab->glink_eh_frame->size); 6533 } 6534 6535 return TRUE; 6536 } 6537 6538 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ 6539 6540 static bfd_boolean 6541 ppc_elf_hash_symbol (struct elf_link_hash_entry *h) 6542 { 6543 if (h->plt.plist != NULL 6544 && !h->def_regular 6545 && (!h->pointer_equality_needed 6546 || !h->ref_regular_nonweak)) 6547 return FALSE; 6548 6549 return _bfd_elf_hash_symbol (h); 6550 } 6551 6552 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0])) 6553 6554 /* Relaxation trampolines. r12 is available for clobbering (r11, is 6555 used for some functions that are allowed to break the ABI). */ 6556 static const int shared_stub_entry[] = 6557 { 6558 0x7c0802a6, /* mflr 0 */ 6559 0x429f0005, /* bcl 20, 31, .Lxxx */ 6560 0x7d8802a6, /* mflr 12 */ 6561 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */ 6562 0x398c0008, /* addi 12, 12, (xxx-.Lxxx)@l */ 6563 0x7c0803a6, /* mtlr 0 */ 6564 0x7d8903a6, /* mtctr 12 */ 6565 0x4e800420, /* bctr */ 6566 }; 6567 6568 static const int stub_entry[] = 6569 { 6570 0x3d800000, /* lis 12,xxx@ha */ 6571 0x398c0000, /* addi 12,12,xxx@l */ 6572 0x7d8903a6, /* mtctr 12 */ 6573 0x4e800420, /* bctr */ 6574 }; 6575 6576 static bfd_boolean 6577 ppc_elf_relax_section (bfd *abfd, 6578 asection *isec, 6579 struct bfd_link_info *link_info, 6580 bfd_boolean *again) 6581 { 6582 struct one_fixup 6583 { 6584 struct one_fixup *next; 6585 asection *tsec; 6586 /* Final link, can use the symbol offset. For a 6587 relocatable link we use the symbol's index. */ 6588 bfd_vma toff; 6589 bfd_vma trampoff; 6590 }; 6591 6592 Elf_Internal_Shdr *symtab_hdr; 6593 bfd_byte *contents = NULL; 6594 Elf_Internal_Sym *isymbuf = NULL; 6595 Elf_Internal_Rela *internal_relocs = NULL; 6596 Elf_Internal_Rela *irel, *irelend; 6597 struct one_fixup *fixups = NULL; 6598 unsigned changes = 0; 6599 struct ppc_elf_link_hash_table *htab; 6600 bfd_size_type trampoff; 6601 asection *got2; 6602 bfd_boolean maybe_pasted; 6603 6604 *again = FALSE; 6605 6606 /* Nothing to do if there are no relocations, and no need to do 6607 anything with non-alloc or non-code sections. */ 6608 if ((isec->flags & SEC_ALLOC) == 0 6609 || (isec->flags & SEC_CODE) == 0 6610 || (isec->flags & SEC_RELOC) == 0 6611 || isec->reloc_count == 0) 6612 return TRUE; 6613 6614 /* We cannot represent the required PIC relocs in the output, so don't 6615 do anything. The linker doesn't support mixing -shared and -r 6616 anyway. */ 6617 if (link_info->relocatable && link_info->shared) 6618 return TRUE; 6619 6620 trampoff = (isec->size + 3) & (bfd_vma) -4; 6621 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0 6622 || strcmp (isec->output_section->name, ".fini") == 0); 6623 /* Space for a branch around any trampolines. */ 6624 if (maybe_pasted) 6625 trampoff += 4; 6626 6627 symtab_hdr = &elf_symtab_hdr (abfd); 6628 6629 /* Get a copy of the native relocations. */ 6630 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL, 6631 link_info->keep_memory); 6632 if (internal_relocs == NULL) 6633 goto error_return; 6634 6635 htab = ppc_elf_hash_table (link_info); 6636 got2 = bfd_get_section_by_name (abfd, ".got2"); 6637 6638 irelend = internal_relocs + isec->reloc_count; 6639 for (irel = internal_relocs; irel < irelend; irel++) 6640 { 6641 unsigned long r_type = ELF32_R_TYPE (irel->r_info); 6642 bfd_vma toff, roff; 6643 asection *tsec; 6644 struct one_fixup *f; 6645 size_t insn_offset = 0; 6646 bfd_vma max_branch_offset, val; 6647 bfd_byte *hit_addr; 6648 unsigned long t0; 6649 struct elf_link_hash_entry *h; 6650 struct plt_entry **plist; 6651 unsigned char sym_type; 6652 6653 switch (r_type) 6654 { 6655 case R_PPC_REL24: 6656 case R_PPC_LOCAL24PC: 6657 case R_PPC_PLTREL24: 6658 max_branch_offset = 1 << 25; 6659 break; 6660 6661 case R_PPC_REL14: 6662 case R_PPC_REL14_BRTAKEN: 6663 case R_PPC_REL14_BRNTAKEN: 6664 max_branch_offset = 1 << 15; 6665 break; 6666 6667 default: 6668 continue; 6669 } 6670 6671 /* Get the value of the symbol referred to by the reloc. */ 6672 h = NULL; 6673 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) 6674 { 6675 /* A local symbol. */ 6676 Elf_Internal_Sym *isym; 6677 6678 /* Read this BFD's local symbols. */ 6679 if (isymbuf == NULL) 6680 { 6681 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; 6682 if (isymbuf == NULL) 6683 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, 6684 symtab_hdr->sh_info, 0, 6685 NULL, NULL, NULL); 6686 if (isymbuf == 0) 6687 goto error_return; 6688 } 6689 isym = isymbuf + ELF32_R_SYM (irel->r_info); 6690 if (isym->st_shndx == SHN_UNDEF) 6691 tsec = bfd_und_section_ptr; 6692 else if (isym->st_shndx == SHN_ABS) 6693 tsec = bfd_abs_section_ptr; 6694 else if (isym->st_shndx == SHN_COMMON) 6695 tsec = bfd_com_section_ptr; 6696 else 6697 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); 6698 6699 toff = isym->st_value; 6700 sym_type = ELF_ST_TYPE (isym->st_info); 6701 } 6702 else 6703 { 6704 /* Global symbol handling. */ 6705 unsigned long indx; 6706 6707 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; 6708 h = elf_sym_hashes (abfd)[indx]; 6709 6710 while (h->root.type == bfd_link_hash_indirect 6711 || h->root.type == bfd_link_hash_warning) 6712 h = (struct elf_link_hash_entry *) h->root.u.i.link; 6713 6714 if (h->root.type == bfd_link_hash_defined 6715 || h->root.type == bfd_link_hash_defweak) 6716 { 6717 tsec = h->root.u.def.section; 6718 toff = h->root.u.def.value; 6719 } 6720 else if (h->root.type == bfd_link_hash_undefined 6721 || h->root.type == bfd_link_hash_undefweak) 6722 { 6723 tsec = bfd_und_section_ptr; 6724 toff = link_info->relocatable ? indx : 0; 6725 } 6726 else 6727 continue; 6728 6729 sym_type = h->type; 6730 } 6731 6732 /* The condition here under which we call find_plt_ent must 6733 match that in relocate_section. If we call find_plt_ent here 6734 but not in relocate_section, or vice versa, then the branch 6735 destination used here may be incorrect. */ 6736 plist = NULL; 6737 if (h != NULL) 6738 { 6739 /* We know is_branch_reloc (r_type) is true. */ 6740 if (h->type == STT_GNU_IFUNC 6741 || r_type == R_PPC_PLTREL24) 6742 plist = &h->plt.plist; 6743 } 6744 else if (sym_type == STT_GNU_IFUNC 6745 && elf_local_got_offsets (abfd) != NULL) 6746 { 6747 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd); 6748 struct plt_entry **local_plt = (struct plt_entry **) 6749 (local_got_offsets + symtab_hdr->sh_info); 6750 plist = local_plt + ELF32_R_SYM (irel->r_info); 6751 } 6752 if (plist != NULL) 6753 { 6754 bfd_vma addend = 0; 6755 struct plt_entry *ent; 6756 6757 if (r_type == R_PPC_PLTREL24 && link_info->shared) 6758 addend = irel->r_addend; 6759 ent = find_plt_ent (plist, got2, addend); 6760 if (ent != NULL) 6761 { 6762 if (htab->plt_type == PLT_NEW 6763 || h == NULL 6764 || !htab->elf.dynamic_sections_created 6765 || h->dynindx == -1) 6766 { 6767 tsec = htab->glink; 6768 toff = ent->glink_offset; 6769 } 6770 else 6771 { 6772 tsec = htab->plt; 6773 toff = ent->plt.offset; 6774 } 6775 } 6776 } 6777 6778 /* If the branch and target are in the same section, you have 6779 no hope of adding stubs. We'll error out later should the 6780 branch overflow. */ 6781 if (tsec == isec) 6782 continue; 6783 6784 /* There probably isn't any reason to handle symbols in 6785 SEC_MERGE sections; SEC_MERGE doesn't seem a likely 6786 attribute for a code section, and we are only looking at 6787 branches. However, implement it correctly here as a 6788 reference for other target relax_section functions. */ 6789 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE) 6790 { 6791 /* At this stage in linking, no SEC_MERGE symbol has been 6792 adjusted, so all references to such symbols need to be 6793 passed through _bfd_merged_section_offset. (Later, in 6794 relocate_section, all SEC_MERGE symbols *except* for 6795 section symbols have been adjusted.) 6796 6797 gas may reduce relocations against symbols in SEC_MERGE 6798 sections to a relocation against the section symbol when 6799 the original addend was zero. When the reloc is against 6800 a section symbol we should include the addend in the 6801 offset passed to _bfd_merged_section_offset, since the 6802 location of interest is the original symbol. On the 6803 other hand, an access to "sym+addend" where "sym" is not 6804 a section symbol should not include the addend; Such an 6805 access is presumed to be an offset from "sym"; The 6806 location of interest is just "sym". */ 6807 if (sym_type == STT_SECTION) 6808 toff += irel->r_addend; 6809 6810 toff = _bfd_merged_section_offset (abfd, &tsec, 6811 elf_section_data (tsec)->sec_info, 6812 toff); 6813 6814 if (sym_type != STT_SECTION) 6815 toff += irel->r_addend; 6816 } 6817 /* PLTREL24 addends are special. */ 6818 else if (r_type != R_PPC_PLTREL24) 6819 toff += irel->r_addend; 6820 6821 /* Attempted -shared link of non-pic code loses. */ 6822 if (tsec->output_section == NULL) 6823 continue; 6824 6825 roff = irel->r_offset; 6826 6827 /* If the branch is in range, no need to do anything. */ 6828 if (tsec != bfd_und_section_ptr 6829 && (!link_info->relocatable 6830 /* A relocatable link may have sections moved during 6831 final link, so do not presume they remain in range. */ 6832 || tsec->output_section == isec->output_section)) 6833 { 6834 bfd_vma symaddr, reladdr; 6835 6836 symaddr = tsec->output_section->vma + tsec->output_offset + toff; 6837 reladdr = isec->output_section->vma + isec->output_offset + roff; 6838 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset) 6839 continue; 6840 } 6841 6842 /* Look for an existing fixup to this address. */ 6843 for (f = fixups; f ; f = f->next) 6844 if (f->tsec == tsec && f->toff == toff) 6845 break; 6846 6847 if (f == NULL) 6848 { 6849 size_t size; 6850 unsigned long stub_rtype; 6851 6852 val = trampoff - roff; 6853 if (val >= max_branch_offset) 6854 /* Oh dear, we can't reach a trampoline. Don't try to add 6855 one. We'll report an error later. */ 6856 continue; 6857 6858 if (link_info->shared) 6859 { 6860 size = 4 * ARRAY_SIZE (shared_stub_entry); 6861 insn_offset = 12; 6862 } 6863 else 6864 { 6865 size = 4 * ARRAY_SIZE (stub_entry); 6866 insn_offset = 0; 6867 } 6868 stub_rtype = R_PPC_RELAX; 6869 if (tsec == htab->plt 6870 || tsec == htab->glink) 6871 { 6872 stub_rtype = R_PPC_RELAX_PLT; 6873 if (r_type == R_PPC_PLTREL24) 6874 stub_rtype = R_PPC_RELAX_PLTREL24; 6875 } 6876 6877 /* Hijack the old relocation. Since we need two 6878 relocations for this use a "composite" reloc. */ 6879 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 6880 stub_rtype); 6881 irel->r_offset = trampoff + insn_offset; 6882 if (r_type == R_PPC_PLTREL24 6883 && stub_rtype != R_PPC_RELAX_PLTREL24) 6884 irel->r_addend = 0; 6885 6886 /* Record the fixup so we don't do it again this section. */ 6887 f = bfd_malloc (sizeof (*f)); 6888 f->next = fixups; 6889 f->tsec = tsec; 6890 f->toff = toff; 6891 f->trampoff = trampoff; 6892 fixups = f; 6893 6894 trampoff += size; 6895 changes++; 6896 } 6897 else 6898 { 6899 val = f->trampoff - roff; 6900 if (val >= max_branch_offset) 6901 continue; 6902 6903 /* Nop out the reloc, since we're finalizing things here. */ 6904 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE); 6905 } 6906 6907 /* Get the section contents. */ 6908 if (contents == NULL) 6909 { 6910 /* Get cached copy if it exists. */ 6911 if (elf_section_data (isec)->this_hdr.contents != NULL) 6912 contents = elf_section_data (isec)->this_hdr.contents; 6913 else 6914 { 6915 /* Go get them off disk. */ 6916 if (!bfd_malloc_and_get_section (abfd, isec, &contents)) 6917 goto error_return; 6918 } 6919 } 6920 6921 /* Fix up the existing branch to hit the trampoline. */ 6922 hit_addr = contents + roff; 6923 switch (r_type) 6924 { 6925 case R_PPC_REL24: 6926 case R_PPC_LOCAL24PC: 6927 case R_PPC_PLTREL24: 6928 t0 = bfd_get_32 (abfd, hit_addr); 6929 t0 &= ~0x3fffffc; 6930 t0 |= val & 0x3fffffc; 6931 bfd_put_32 (abfd, t0, hit_addr); 6932 break; 6933 6934 case R_PPC_REL14: 6935 case R_PPC_REL14_BRTAKEN: 6936 case R_PPC_REL14_BRNTAKEN: 6937 t0 = bfd_get_32 (abfd, hit_addr); 6938 t0 &= ~0xfffc; 6939 t0 |= val & 0xfffc; 6940 bfd_put_32 (abfd, t0, hit_addr); 6941 break; 6942 } 6943 } 6944 6945 /* Write out the trampolines. */ 6946 if (fixups != NULL) 6947 { 6948 const int *stub; 6949 bfd_byte *dest; 6950 int i, size; 6951 6952 do 6953 { 6954 struct one_fixup *f = fixups; 6955 fixups = fixups->next; 6956 free (f); 6957 } 6958 while (fixups); 6959 6960 contents = bfd_realloc_or_free (contents, trampoff); 6961 if (contents == NULL) 6962 goto error_return; 6963 6964 isec->size = (isec->size + 3) & (bfd_vma) -4; 6965 dest = contents + isec->size; 6966 /* Branch around the trampolines. */ 6967 if (maybe_pasted) 6968 { 6969 bfd_vma val = B + trampoff - isec->size; 6970 bfd_put_32 (abfd, val, dest); 6971 dest += 4; 6972 } 6973 isec->size = trampoff; 6974 6975 if (link_info->shared) 6976 { 6977 stub = shared_stub_entry; 6978 size = ARRAY_SIZE (shared_stub_entry); 6979 } 6980 else 6981 { 6982 stub = stub_entry; 6983 size = ARRAY_SIZE (stub_entry); 6984 } 6985 6986 i = 0; 6987 while (dest < contents + trampoff) 6988 { 6989 bfd_put_32 (abfd, stub[i], dest); 6990 i++; 6991 if (i == size) 6992 i = 0; 6993 dest += 4; 6994 } 6995 BFD_ASSERT (i == 0); 6996 } 6997 6998 if (isymbuf != NULL 6999 && symtab_hdr->contents != (unsigned char *) isymbuf) 7000 { 7001 if (! link_info->keep_memory) 7002 free (isymbuf); 7003 else 7004 { 7005 /* Cache the symbols for elf_link_input_bfd. */ 7006 symtab_hdr->contents = (unsigned char *) isymbuf; 7007 } 7008 } 7009 7010 if (contents != NULL 7011 && elf_section_data (isec)->this_hdr.contents != contents) 7012 { 7013 if (!changes && !link_info->keep_memory) 7014 free (contents); 7015 else 7016 { 7017 /* Cache the section contents for elf_link_input_bfd. */ 7018 elf_section_data (isec)->this_hdr.contents = contents; 7019 } 7020 } 7021 7022 if (changes != 0) 7023 { 7024 /* Append sufficient NOP relocs so we can write out relocation 7025 information for the trampolines. */ 7026 Elf_Internal_Shdr *rel_hdr; 7027 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count) 7028 * sizeof (*new_relocs)); 7029 unsigned ix; 7030 7031 if (!new_relocs) 7032 goto error_return; 7033 memcpy (new_relocs, internal_relocs, 7034 isec->reloc_count * sizeof (*new_relocs)); 7035 for (ix = changes; ix--;) 7036 { 7037 irel = new_relocs + ix + isec->reloc_count; 7038 7039 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE); 7040 } 7041 if (internal_relocs != elf_section_data (isec)->relocs) 7042 free (internal_relocs); 7043 elf_section_data (isec)->relocs = new_relocs; 7044 isec->reloc_count += changes; 7045 rel_hdr = _bfd_elf_single_rel_hdr (isec); 7046 rel_hdr->sh_size += changes * rel_hdr->sh_entsize; 7047 } 7048 else if (elf_section_data (isec)->relocs != internal_relocs) 7049 free (internal_relocs); 7050 7051 *again = changes != 0; 7052 if (!*again && link_info->relocatable) 7053 { 7054 /* Convert the internal relax relocs to external form. */ 7055 for (irel = internal_relocs; irel < irelend; irel++) 7056 if (ELF32_R_TYPE (irel->r_info) == R_PPC_RELAX) 7057 { 7058 unsigned long r_symndx = ELF32_R_SYM (irel->r_info); 7059 7060 /* Rewrite the reloc and convert one of the trailing nop 7061 relocs to describe this relocation. */ 7062 BFD_ASSERT (ELF32_R_TYPE (irelend[-1].r_info) == R_PPC_NONE); 7063 /* The relocs are at the bottom 2 bytes */ 7064 irel[0].r_offset += 2; 7065 memmove (irel + 1, irel, (irelend - irel - 1) * sizeof (*irel)); 7066 irel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA); 7067 irel[1].r_offset += 4; 7068 irel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO); 7069 irel++; 7070 } 7071 } 7072 7073 return TRUE; 7074 7075 error_return: 7076 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents) 7077 free (isymbuf); 7078 if (contents != NULL 7079 && elf_section_data (isec)->this_hdr.contents != contents) 7080 free (contents); 7081 if (internal_relocs != NULL 7082 && elf_section_data (isec)->relocs != internal_relocs) 7083 free (internal_relocs); 7084 return FALSE; 7085 } 7086 7087 /* What to do when ld finds relocations against symbols defined in 7088 discarded sections. */ 7089 7090 static unsigned int 7091 ppc_elf_action_discarded (asection *sec) 7092 { 7093 if (strcmp (".fixup", sec->name) == 0) 7094 return 0; 7095 7096 if (strcmp (".got2", sec->name) == 0) 7097 return 0; 7098 7099 return _bfd_elf_default_action_discarded (sec); 7100 } 7101 7102 /* Fill in the address for a pointer generated in a linker section. */ 7103 7104 static bfd_vma 7105 elf_finish_pointer_linker_section (bfd *input_bfd, 7106 elf_linker_section_t *lsect, 7107 struct elf_link_hash_entry *h, 7108 bfd_vma relocation, 7109 const Elf_Internal_Rela *rel) 7110 { 7111 elf_linker_section_pointers_t *linker_section_ptr; 7112 7113 BFD_ASSERT (lsect != NULL); 7114 7115 if (h != NULL) 7116 { 7117 /* Handle global symbol. */ 7118 struct ppc_elf_link_hash_entry *eh; 7119 7120 eh = (struct ppc_elf_link_hash_entry *) h; 7121 BFD_ASSERT (eh->elf.def_regular); 7122 linker_section_ptr = eh->linker_section_pointer; 7123 } 7124 else 7125 { 7126 /* Handle local symbol. */ 7127 unsigned long r_symndx = ELF32_R_SYM (rel->r_info); 7128 7129 BFD_ASSERT (is_ppc_elf (input_bfd)); 7130 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL); 7131 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx]; 7132 } 7133 7134 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr, 7135 rel->r_addend, 7136 lsect); 7137 BFD_ASSERT (linker_section_ptr != NULL); 7138 7139 /* Offset will always be a multiple of four, so use the bottom bit 7140 as a "written" flag. */ 7141 if ((linker_section_ptr->offset & 1) == 0) 7142 { 7143 bfd_put_32 (lsect->section->owner, 7144 relocation + linker_section_ptr->addend, 7145 lsect->section->contents + linker_section_ptr->offset); 7146 linker_section_ptr->offset += 1; 7147 } 7148 7149 relocation = (lsect->section->output_section->vma 7150 + lsect->section->output_offset 7151 + linker_section_ptr->offset - 1 7152 - SYM_VAL (lsect->sym)); 7153 7154 #ifdef DEBUG 7155 fprintf (stderr, 7156 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n", 7157 lsect->name, (long) relocation, (long) relocation); 7158 #endif 7159 7160 return relocation; 7161 } 7162 7163 #define PPC_LO(v) ((v) & 0xffff) 7164 #define PPC_HI(v) (((v) >> 16) & 0xffff) 7165 #define PPC_HA(v) PPC_HI ((v) + 0x8000) 7166 7167 static void 7168 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p, 7169 struct bfd_link_info *info) 7170 { 7171 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 7172 bfd *output_bfd = info->output_bfd; 7173 bfd_vma plt; 7174 7175 plt = ((ent->plt.offset & ~1) 7176 + plt_sec->output_section->vma 7177 + plt_sec->output_offset); 7178 7179 if (info->shared) 7180 { 7181 bfd_vma got = 0; 7182 7183 if (ent->addend >= 32768) 7184 got = (ent->addend 7185 + ent->sec->output_section->vma 7186 + ent->sec->output_offset); 7187 else if (htab->elf.hgot != NULL) 7188 got = SYM_VAL (htab->elf.hgot); 7189 7190 plt -= got; 7191 7192 if (plt + 0x8000 < 0x10000) 7193 { 7194 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p); 7195 p += 4; 7196 bfd_put_32 (output_bfd, MTCTR_11, p); 7197 p += 4; 7198 bfd_put_32 (output_bfd, BCTR, p); 7199 p += 4; 7200 bfd_put_32 (output_bfd, NOP, p); 7201 p += 4; 7202 } 7203 else 7204 { 7205 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p); 7206 p += 4; 7207 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p); 7208 p += 4; 7209 bfd_put_32 (output_bfd, MTCTR_11, p); 7210 p += 4; 7211 bfd_put_32 (output_bfd, BCTR, p); 7212 p += 4; 7213 } 7214 } 7215 else 7216 { 7217 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p); 7218 p += 4; 7219 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p); 7220 p += 4; 7221 bfd_put_32 (output_bfd, MTCTR_11, p); 7222 p += 4; 7223 bfd_put_32 (output_bfd, BCTR, p); 7224 p += 4; 7225 } 7226 } 7227 7228 /* Return true if symbol is defined statically. */ 7229 7230 static bfd_boolean 7231 is_static_defined (struct elf_link_hash_entry *h) 7232 { 7233 return ((h->root.type == bfd_link_hash_defined 7234 || h->root.type == bfd_link_hash_defweak) 7235 && h->root.u.def.section != NULL 7236 && h->root.u.def.section->output_section != NULL); 7237 } 7238 7239 /* If INSN is an opcode that may be used with an @tls operand, return 7240 the transformed insn for TLS optimisation, otherwise return 0. If 7241 REG is non-zero only match an insn with RB or RA equal to REG. */ 7242 7243 unsigned int 7244 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg) 7245 { 7246 unsigned int rtra; 7247 7248 if ((insn & (0x3f << 26)) != 31 << 26) 7249 return 0; 7250 7251 if (reg == 0 || ((insn >> 11) & 0x1f) == reg) 7252 rtra = insn & ((1 << 26) - (1 << 16)); 7253 else if (((insn >> 16) & 0x1f) == reg) 7254 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5); 7255 else 7256 return 0; 7257 7258 if ((insn & (0x3ff << 1)) == 266 << 1) 7259 /* add -> addi. */ 7260 insn = 14 << 26; 7261 else if ((insn & (0x1f << 1)) == 23 << 1 7262 && ((insn & (0x1f << 6)) < 14 << 6 7263 || ((insn & (0x1f << 6)) >= 16 << 6 7264 && (insn & (0x1f << 6)) < 24 << 6))) 7265 /* load and store indexed -> dform. */ 7266 insn = (32 | ((insn >> 6) & 0x1f)) << 26; 7267 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1) 7268 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */ 7269 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1); 7270 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1) 7271 /* lwax -> lwa. */ 7272 insn = (58 << 26) | 2; 7273 else 7274 return 0; 7275 insn |= rtra; 7276 return insn; 7277 } 7278 7279 /* If INSN is an opcode that may be used with an @tprel operand, return 7280 the transformed insn for an undefined weak symbol, ie. with the 7281 thread pointer REG operand removed. Otherwise return 0. */ 7282 7283 unsigned int 7284 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg) 7285 { 7286 if ((insn & (0x1f << 16)) == reg << 16 7287 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */ 7288 || (insn & (0x3f << 26)) == 15u << 26 /* addis */ 7289 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */ 7290 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */ 7291 || (insn & (0x3f << 26)) == 36u << 26 /* stw */ 7292 || (insn & (0x3f << 26)) == 38u << 26 /* stb */ 7293 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */ 7294 || (insn & (0x3f << 26)) == 42u << 26 /* lha */ 7295 || (insn & (0x3f << 26)) == 44u << 26 /* sth */ 7296 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */ 7297 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */ 7298 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */ 7299 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */ 7300 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */ 7301 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */ 7302 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */ 7303 && (insn & 3) != 1) 7304 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */ 7305 && ((insn & 3) == 0 || (insn & 3) == 3)))) 7306 { 7307 insn &= ~(0x1f << 16); 7308 } 7309 else if ((insn & (0x1f << 21)) == reg << 21 7310 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */ 7311 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */ 7312 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */)) 7313 { 7314 insn &= ~(0x1f << 21); 7315 insn |= (insn & (0x1f << 16)) << 5; 7316 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */) 7317 insn -= 2 >> 26; /* convert to ori,oris */ 7318 } 7319 else 7320 insn = 0; 7321 return insn; 7322 } 7323 7324 static bfd_boolean 7325 is_insn_ds_form (unsigned int insn) 7326 { 7327 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */ 7328 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */ 7329 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */ 7330 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */); 7331 } 7332 7333 static bfd_boolean 7334 is_insn_dq_form (unsigned int insn) 7335 { 7336 return (insn & (0x3f << 26)) == 56u << 26; /* lq */ 7337 } 7338 7339 /* The RELOCATE_SECTION function is called by the ELF backend linker 7340 to handle the relocations for a section. 7341 7342 The relocs are always passed as Rela structures; if the section 7343 actually uses Rel structures, the r_addend field will always be 7344 zero. 7345 7346 This function is responsible for adjust the section contents as 7347 necessary, and (if using Rela relocs and generating a 7348 relocatable output file) adjusting the reloc addend as 7349 necessary. 7350 7351 This function does not have to worry about setting the reloc 7352 address or the reloc symbol index. 7353 7354 LOCAL_SYMS is a pointer to the swapped in local symbols. 7355 7356 LOCAL_SECTIONS is an array giving the section in the input file 7357 corresponding to the st_shndx field of each local symbol. 7358 7359 The global hash table entry for the global symbols can be found 7360 via elf_sym_hashes (input_bfd). 7361 7362 When generating relocatable output, this function must handle 7363 STB_LOCAL/STT_SECTION symbols specially. The output symbol is 7364 going to be the section symbol corresponding to the output 7365 section, which means that the addend must be adjusted 7366 accordingly. */ 7367 7368 static bfd_boolean 7369 ppc_elf_relocate_section (bfd *output_bfd, 7370 struct bfd_link_info *info, 7371 bfd *input_bfd, 7372 asection *input_section, 7373 bfd_byte *contents, 7374 Elf_Internal_Rela *relocs, 7375 Elf_Internal_Sym *local_syms, 7376 asection **local_sections) 7377 { 7378 Elf_Internal_Shdr *symtab_hdr; 7379 struct elf_link_hash_entry **sym_hashes; 7380 struct ppc_elf_link_hash_table *htab; 7381 Elf_Internal_Rela *rel; 7382 Elf_Internal_Rela *relend; 7383 Elf_Internal_Rela outrel; 7384 asection *got2, *sreloc = NULL; 7385 bfd_vma *local_got_offsets; 7386 bfd_boolean ret = TRUE; 7387 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0); 7388 bfd_boolean is_vxworks_tls; 7389 7390 #ifdef DEBUG 7391 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, " 7392 "%ld relocations%s", 7393 input_bfd, input_section, 7394 (long) input_section->reloc_count, 7395 (info->relocatable) ? " (relocatable)" : ""); 7396 #endif 7397 7398 got2 = bfd_get_section_by_name (input_bfd, ".got2"); 7399 7400 /* Initialize howto table if not already done. */ 7401 if (!ppc_elf_howto_table[R_PPC_ADDR32]) 7402 ppc_elf_howto_init (); 7403 7404 htab = ppc_elf_hash_table (info); 7405 local_got_offsets = elf_local_got_offsets (input_bfd); 7406 symtab_hdr = &elf_symtab_hdr (input_bfd); 7407 sym_hashes = elf_sym_hashes (input_bfd); 7408 /* We have to handle relocations in vxworks .tls_vars sections 7409 specially, because the dynamic loader is 'weird'. */ 7410 is_vxworks_tls = (htab->is_vxworks && info->shared 7411 && !strcmp (input_section->output_section->name, 7412 ".tls_vars")); 7413 rel = relocs; 7414 relend = relocs + input_section->reloc_count; 7415 for (; rel < relend; rel++) 7416 { 7417 enum elf_ppc_reloc_type r_type; 7418 bfd_vma addend; 7419 bfd_reloc_status_type r; 7420 Elf_Internal_Sym *sym; 7421 asection *sec; 7422 struct elf_link_hash_entry *h; 7423 const char *sym_name; 7424 reloc_howto_type *howto; 7425 unsigned long r_symndx; 7426 bfd_vma relocation; 7427 bfd_vma branch_bit, from; 7428 bfd_boolean unresolved_reloc; 7429 bfd_boolean warned; 7430 unsigned int tls_type, tls_mask, tls_gd; 7431 struct plt_entry **ifunc; 7432 7433 r_type = ELF32_R_TYPE (rel->r_info); 7434 sym = NULL; 7435 sec = NULL; 7436 h = NULL; 7437 unresolved_reloc = FALSE; 7438 warned = FALSE; 7439 r_symndx = ELF32_R_SYM (rel->r_info); 7440 7441 if (r_symndx < symtab_hdr->sh_info) 7442 { 7443 sym = local_syms + r_symndx; 7444 sec = local_sections[r_symndx]; 7445 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec); 7446 7447 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 7448 } 7449 else 7450 { 7451 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 7452 r_symndx, symtab_hdr, sym_hashes, 7453 h, sec, relocation, 7454 unresolved_reloc, warned); 7455 7456 sym_name = h->root.root.string; 7457 } 7458 7459 if (sec != NULL && discarded_section (sec)) 7460 { 7461 /* For relocs against symbols from removed linkonce sections, 7462 or sections discarded by a linker script, we just want the 7463 section contents zeroed. Avoid any special processing. */ 7464 howto = NULL; 7465 if (r_type < R_PPC_max) 7466 howto = ppc_elf_howto_table[r_type]; 7467 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 7468 rel, 1, relend, howto, 0, contents); 7469 } 7470 7471 if (info->relocatable) 7472 { 7473 if (got2 != NULL 7474 && r_type == R_PPC_PLTREL24 7475 && rel->r_addend != 0) 7476 { 7477 /* R_PPC_PLTREL24 is rather special. If non-zero, the 7478 addend specifies the GOT pointer offset within .got2. */ 7479 rel->r_addend += got2->output_offset; 7480 } 7481 continue; 7482 } 7483 7484 /* TLS optimizations. Replace instruction sequences and relocs 7485 based on information we collected in tls_optimize. We edit 7486 RELOCS so that --emit-relocs will output something sensible 7487 for the final instruction stream. */ 7488 tls_mask = 0; 7489 tls_gd = 0; 7490 if (h != NULL) 7491 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask; 7492 else if (local_got_offsets != NULL) 7493 { 7494 struct plt_entry **local_plt; 7495 char *lgot_masks; 7496 local_plt 7497 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info); 7498 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info); 7499 tls_mask = lgot_masks[r_symndx]; 7500 } 7501 7502 /* Ensure reloc mapping code below stays sane. */ 7503 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3) 7504 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3) 7505 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3) 7506 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3) 7507 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3) 7508 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3) 7509 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3) 7510 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3)) 7511 abort (); 7512 switch (r_type) 7513 { 7514 default: 7515 break; 7516 7517 case R_PPC_GOT_TPREL16: 7518 case R_PPC_GOT_TPREL16_LO: 7519 if ((tls_mask & TLS_TLS) != 0 7520 && (tls_mask & TLS_TPREL) == 0) 7521 { 7522 bfd_vma insn; 7523 7524 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset); 7525 insn &= 31 << 21; 7526 insn |= 0x3c020000; /* addis 0,2,0 */ 7527 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset); 7528 r_type = R_PPC_TPREL16_HA; 7529 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 7530 } 7531 break; 7532 7533 case R_PPC_TLS: 7534 if ((tls_mask & TLS_TLS) != 0 7535 && (tls_mask & TLS_TPREL) == 0) 7536 { 7537 bfd_vma insn; 7538 7539 insn = bfd_get_32 (output_bfd, contents + rel->r_offset); 7540 insn = _bfd_elf_ppc_at_tls_transform (insn, 2); 7541 if (insn == 0) 7542 abort (); 7543 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 7544 r_type = R_PPC_TPREL16_LO; 7545 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 7546 7547 /* Was PPC_TLS which sits on insn boundary, now 7548 PPC_TPREL16_LO which is at low-order half-word. */ 7549 rel->r_offset += d_offset; 7550 } 7551 break; 7552 7553 case R_PPC_GOT_TLSGD16_HI: 7554 case R_PPC_GOT_TLSGD16_HA: 7555 tls_gd = TLS_TPRELGD; 7556 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0) 7557 goto tls_gdld_hi; 7558 break; 7559 7560 case R_PPC_GOT_TLSLD16_HI: 7561 case R_PPC_GOT_TLSLD16_HA: 7562 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0) 7563 { 7564 tls_gdld_hi: 7565 if ((tls_mask & tls_gd) != 0) 7566 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3) 7567 + R_PPC_GOT_TPREL16); 7568 else 7569 { 7570 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset); 7571 rel->r_offset -= d_offset; 7572 r_type = R_PPC_NONE; 7573 } 7574 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 7575 } 7576 break; 7577 7578 case R_PPC_GOT_TLSGD16: 7579 case R_PPC_GOT_TLSGD16_LO: 7580 tls_gd = TLS_TPRELGD; 7581 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0) 7582 goto tls_ldgd_opt; 7583 break; 7584 7585 case R_PPC_GOT_TLSLD16: 7586 case R_PPC_GOT_TLSLD16_LO: 7587 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0) 7588 { 7589 unsigned int insn1, insn2; 7590 bfd_vma offset; 7591 7592 tls_ldgd_opt: 7593 offset = (bfd_vma) -1; 7594 /* If not using the newer R_PPC_TLSGD/LD to mark 7595 __tls_get_addr calls, we must trust that the call 7596 stays with its arg setup insns, ie. that the next 7597 reloc is the __tls_get_addr call associated with 7598 the current reloc. Edit both insns. */ 7599 if (input_section->has_tls_get_addr_call 7600 && rel + 1 < relend 7601 && branch_reloc_hash_match (input_bfd, rel + 1, 7602 htab->tls_get_addr)) 7603 offset = rel[1].r_offset; 7604 if ((tls_mask & tls_gd) != 0) 7605 { 7606 /* IE */ 7607 insn1 = bfd_get_32 (output_bfd, 7608 contents + rel->r_offset - d_offset); 7609 insn1 &= (1 << 26) - 1; 7610 insn1 |= 32 << 26; /* lwz */ 7611 if (offset != (bfd_vma) -1) 7612 { 7613 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE); 7614 insn2 = 0x7c631214; /* add 3,3,2 */ 7615 bfd_put_32 (output_bfd, insn2, contents + offset); 7616 } 7617 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3) 7618 + R_PPC_GOT_TPREL16); 7619 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 7620 } 7621 else 7622 { 7623 /* LE */ 7624 insn1 = 0x3c620000; /* addis 3,2,0 */ 7625 if (tls_gd == 0) 7626 { 7627 /* Was an LD reloc. */ 7628 for (r_symndx = 0; 7629 r_symndx < symtab_hdr->sh_info; 7630 r_symndx++) 7631 if (local_sections[r_symndx] == sec) 7632 break; 7633 if (r_symndx >= symtab_hdr->sh_info) 7634 r_symndx = STN_UNDEF; 7635 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; 7636 if (r_symndx != STN_UNDEF) 7637 rel->r_addend -= (local_syms[r_symndx].st_value 7638 + sec->output_offset 7639 + sec->output_section->vma); 7640 } 7641 r_type = R_PPC_TPREL16_HA; 7642 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 7643 if (offset != (bfd_vma) -1) 7644 { 7645 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO); 7646 rel[1].r_offset = offset + d_offset; 7647 rel[1].r_addend = rel->r_addend; 7648 insn2 = 0x38630000; /* addi 3,3,0 */ 7649 bfd_put_32 (output_bfd, insn2, contents + offset); 7650 } 7651 } 7652 bfd_put_32 (output_bfd, insn1, 7653 contents + rel->r_offset - d_offset); 7654 if (tls_gd == 0) 7655 { 7656 /* We changed the symbol on an LD reloc. Start over 7657 in order to get h, sym, sec etc. right. */ 7658 rel--; 7659 continue; 7660 } 7661 } 7662 break; 7663 7664 case R_PPC_TLSGD: 7665 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0) 7666 { 7667 unsigned int insn2; 7668 bfd_vma offset = rel->r_offset; 7669 7670 if ((tls_mask & TLS_TPRELGD) != 0) 7671 { 7672 /* IE */ 7673 r_type = R_PPC_NONE; 7674 insn2 = 0x7c631214; /* add 3,3,2 */ 7675 } 7676 else 7677 { 7678 /* LE */ 7679 r_type = R_PPC_TPREL16_LO; 7680 rel->r_offset += d_offset; 7681 insn2 = 0x38630000; /* addi 3,3,0 */ 7682 } 7683 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 7684 bfd_put_32 (output_bfd, insn2, contents + offset); 7685 /* Zap the reloc on the _tls_get_addr call too. */ 7686 BFD_ASSERT (offset == rel[1].r_offset); 7687 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE); 7688 } 7689 break; 7690 7691 case R_PPC_TLSLD: 7692 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0) 7693 { 7694 unsigned int insn2; 7695 7696 for (r_symndx = 0; 7697 r_symndx < symtab_hdr->sh_info; 7698 r_symndx++) 7699 if (local_sections[r_symndx] == sec) 7700 break; 7701 if (r_symndx >= symtab_hdr->sh_info) 7702 r_symndx = STN_UNDEF; 7703 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; 7704 if (r_symndx != STN_UNDEF) 7705 rel->r_addend -= (local_syms[r_symndx].st_value 7706 + sec->output_offset 7707 + sec->output_section->vma); 7708 7709 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO); 7710 rel->r_offset += d_offset; 7711 insn2 = 0x38630000; /* addi 3,3,0 */ 7712 bfd_put_32 (output_bfd, insn2, 7713 contents + rel->r_offset - d_offset); 7714 /* Zap the reloc on the _tls_get_addr call too. */ 7715 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset); 7716 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE); 7717 rel--; 7718 continue; 7719 } 7720 break; 7721 } 7722 7723 /* Handle other relocations that tweak non-addend part of insn. */ 7724 branch_bit = 0; 7725 switch (r_type) 7726 { 7727 default: 7728 break; 7729 7730 /* Branch taken prediction relocations. */ 7731 case R_PPC_ADDR14_BRTAKEN: 7732 case R_PPC_REL14_BRTAKEN: 7733 branch_bit = BRANCH_PREDICT_BIT; 7734 /* Fall thru */ 7735 7736 /* Branch not taken prediction relocations. */ 7737 case R_PPC_ADDR14_BRNTAKEN: 7738 case R_PPC_REL14_BRNTAKEN: 7739 { 7740 bfd_vma insn; 7741 7742 insn = bfd_get_32 (output_bfd, contents + rel->r_offset); 7743 insn &= ~BRANCH_PREDICT_BIT; 7744 insn |= branch_bit; 7745 7746 from = (rel->r_offset 7747 + input_section->output_offset 7748 + input_section->output_section->vma); 7749 7750 /* Invert 'y' bit if not the default. */ 7751 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0) 7752 insn ^= BRANCH_PREDICT_BIT; 7753 7754 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 7755 break; 7756 } 7757 } 7758 7759 ifunc = NULL; 7760 if (!htab->is_vxworks) 7761 { 7762 struct plt_entry *ent; 7763 7764 if (h != NULL) 7765 { 7766 if (h->type == STT_GNU_IFUNC) 7767 ifunc = &h->plt.plist; 7768 } 7769 else if (local_got_offsets != NULL 7770 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) 7771 { 7772 struct plt_entry **local_plt; 7773 7774 local_plt = (struct plt_entry **) (local_got_offsets 7775 + symtab_hdr->sh_info); 7776 ifunc = local_plt + r_symndx; 7777 } 7778 7779 ent = NULL; 7780 if (ifunc != NULL 7781 && (!info->shared 7782 || is_branch_reloc (r_type))) 7783 { 7784 addend = 0; 7785 if (r_type == R_PPC_PLTREL24 && info->shared) 7786 addend = rel->r_addend; 7787 ent = find_plt_ent (ifunc, got2, addend); 7788 } 7789 if (ent != NULL) 7790 { 7791 if (h == NULL && (ent->plt.offset & 1) == 0) 7792 { 7793 Elf_Internal_Rela rela; 7794 bfd_byte *loc; 7795 7796 rela.r_offset = (htab->iplt->output_section->vma 7797 + htab->iplt->output_offset 7798 + ent->plt.offset); 7799 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); 7800 rela.r_addend = relocation; 7801 loc = htab->reliplt->contents; 7802 loc += (htab->reliplt->reloc_count++ 7803 * sizeof (Elf32_External_Rela)); 7804 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 7805 7806 ent->plt.offset |= 1; 7807 } 7808 if (h == NULL && (ent->glink_offset & 1) == 0) 7809 { 7810 unsigned char *p = ((unsigned char *) htab->glink->contents 7811 + ent->glink_offset); 7812 write_glink_stub (ent, htab->iplt, p, info); 7813 ent->glink_offset |= 1; 7814 } 7815 7816 unresolved_reloc = FALSE; 7817 if (htab->plt_type == PLT_NEW 7818 || !htab->elf.dynamic_sections_created 7819 || h == NULL) 7820 relocation = (htab->glink->output_section->vma 7821 + htab->glink->output_offset 7822 + (ent->glink_offset & ~1)); 7823 else 7824 relocation = (htab->plt->output_section->vma 7825 + htab->plt->output_offset 7826 + ent->plt.offset); 7827 } 7828 } 7829 7830 addend = rel->r_addend; 7831 tls_type = 0; 7832 howto = NULL; 7833 if (r_type < R_PPC_max) 7834 howto = ppc_elf_howto_table[r_type]; 7835 switch (r_type) 7836 { 7837 default: 7838 info->callbacks->einfo 7839 (_("%P: %B: unknown relocation type %d for symbol %s\n"), 7840 input_bfd, (int) r_type, sym_name); 7841 7842 bfd_set_error (bfd_error_bad_value); 7843 ret = FALSE; 7844 continue; 7845 7846 case R_PPC_NONE: 7847 case R_PPC_TLS: 7848 case R_PPC_TLSGD: 7849 case R_PPC_TLSLD: 7850 case R_PPC_EMB_MRKREF: 7851 case R_PPC_GNU_VTINHERIT: 7852 case R_PPC_GNU_VTENTRY: 7853 continue; 7854 7855 /* GOT16 relocations. Like an ADDR16 using the symbol's 7856 address in the GOT as relocation value instead of the 7857 symbol's value itself. Also, create a GOT entry for the 7858 symbol and put the symbol value there. */ 7859 case R_PPC_GOT_TLSGD16: 7860 case R_PPC_GOT_TLSGD16_LO: 7861 case R_PPC_GOT_TLSGD16_HI: 7862 case R_PPC_GOT_TLSGD16_HA: 7863 tls_type = TLS_TLS | TLS_GD; 7864 goto dogot; 7865 7866 case R_PPC_GOT_TLSLD16: 7867 case R_PPC_GOT_TLSLD16_LO: 7868 case R_PPC_GOT_TLSLD16_HI: 7869 case R_PPC_GOT_TLSLD16_HA: 7870 tls_type = TLS_TLS | TLS_LD; 7871 goto dogot; 7872 7873 case R_PPC_GOT_TPREL16: 7874 case R_PPC_GOT_TPREL16_LO: 7875 case R_PPC_GOT_TPREL16_HI: 7876 case R_PPC_GOT_TPREL16_HA: 7877 tls_type = TLS_TLS | TLS_TPREL; 7878 goto dogot; 7879 7880 case R_PPC_GOT_DTPREL16: 7881 case R_PPC_GOT_DTPREL16_LO: 7882 case R_PPC_GOT_DTPREL16_HI: 7883 case R_PPC_GOT_DTPREL16_HA: 7884 tls_type = TLS_TLS | TLS_DTPREL; 7885 goto dogot; 7886 7887 case R_PPC_GOT16: 7888 case R_PPC_GOT16_LO: 7889 case R_PPC_GOT16_HI: 7890 case R_PPC_GOT16_HA: 7891 tls_mask = 0; 7892 dogot: 7893 { 7894 /* Relocation is to the entry for this symbol in the global 7895 offset table. */ 7896 bfd_vma off; 7897 bfd_vma *offp; 7898 unsigned long indx; 7899 7900 if (htab->got == NULL) 7901 abort (); 7902 7903 indx = 0; 7904 if (tls_type == (TLS_TLS | TLS_LD) 7905 && (h == NULL 7906 || !h->def_dynamic)) 7907 offp = &htab->tlsld_got.offset; 7908 else if (h != NULL) 7909 { 7910 bfd_boolean dyn; 7911 dyn = htab->elf.dynamic_sections_created; 7912 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) 7913 || (info->shared 7914 && SYMBOL_REFERENCES_LOCAL (info, h))) 7915 /* This is actually a static link, or it is a 7916 -Bsymbolic link and the symbol is defined 7917 locally, or the symbol was forced to be local 7918 because of a version file. */ 7919 ; 7920 else 7921 { 7922 BFD_ASSERT (h->dynindx != -1); 7923 indx = h->dynindx; 7924 unresolved_reloc = FALSE; 7925 } 7926 offp = &h->got.offset; 7927 } 7928 else 7929 { 7930 if (local_got_offsets == NULL) 7931 abort (); 7932 offp = &local_got_offsets[r_symndx]; 7933 } 7934 7935 /* The offset must always be a multiple of 4. We use the 7936 least significant bit to record whether we have already 7937 processed this entry. */ 7938 off = *offp; 7939 if ((off & 1) != 0) 7940 off &= ~1; 7941 else 7942 { 7943 unsigned int tls_m = (tls_mask 7944 & (TLS_LD | TLS_GD | TLS_DTPREL 7945 | TLS_TPREL | TLS_TPRELGD)); 7946 7947 if (offp == &htab->tlsld_got.offset) 7948 tls_m = TLS_LD; 7949 else if (h == NULL 7950 || !h->def_dynamic) 7951 tls_m &= ~TLS_LD; 7952 7953 /* We might have multiple got entries for this sym. 7954 Initialize them all. */ 7955 do 7956 { 7957 int tls_ty = 0; 7958 7959 if ((tls_m & TLS_LD) != 0) 7960 { 7961 tls_ty = TLS_TLS | TLS_LD; 7962 tls_m &= ~TLS_LD; 7963 } 7964 else if ((tls_m & TLS_GD) != 0) 7965 { 7966 tls_ty = TLS_TLS | TLS_GD; 7967 tls_m &= ~TLS_GD; 7968 } 7969 else if ((tls_m & TLS_DTPREL) != 0) 7970 { 7971 tls_ty = TLS_TLS | TLS_DTPREL; 7972 tls_m &= ~TLS_DTPREL; 7973 } 7974 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0) 7975 { 7976 tls_ty = TLS_TLS | TLS_TPREL; 7977 tls_m = 0; 7978 } 7979 7980 /* Generate relocs for the dynamic linker. */ 7981 if ((info->shared || indx != 0) 7982 && (offp == &htab->tlsld_got.offset 7983 || h == NULL 7984 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 7985 || h->root.type != bfd_link_hash_undefweak)) 7986 { 7987 asection *rsec = htab->relgot; 7988 bfd_byte * loc; 7989 7990 outrel.r_offset = (htab->got->output_section->vma 7991 + htab->got->output_offset 7992 + off); 7993 outrel.r_addend = 0; 7994 if (tls_ty & (TLS_LD | TLS_GD)) 7995 { 7996 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32); 7997 if (tls_ty == (TLS_TLS | TLS_GD)) 7998 { 7999 loc = rsec->contents; 8000 loc += (rsec->reloc_count++ 8001 * sizeof (Elf32_External_Rela)); 8002 bfd_elf32_swap_reloca_out (output_bfd, 8003 &outrel, loc); 8004 outrel.r_offset += 4; 8005 outrel.r_info 8006 = ELF32_R_INFO (indx, R_PPC_DTPREL32); 8007 } 8008 } 8009 else if (tls_ty == (TLS_TLS | TLS_DTPREL)) 8010 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32); 8011 else if (tls_ty == (TLS_TLS | TLS_TPREL)) 8012 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32); 8013 else if (indx != 0) 8014 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT); 8015 else if (ifunc != NULL) 8016 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); 8017 else 8018 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE); 8019 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD)) 8020 { 8021 outrel.r_addend += relocation; 8022 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL)) 8023 outrel.r_addend -= htab->elf.tls_sec->vma; 8024 } 8025 loc = rsec->contents; 8026 loc += (rsec->reloc_count++ 8027 * sizeof (Elf32_External_Rela)); 8028 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 8029 } 8030 8031 /* Init the .got section contents if we're not 8032 emitting a reloc. */ 8033 else 8034 { 8035 bfd_vma value = relocation; 8036 8037 if (tls_ty == (TLS_TLS | TLS_LD)) 8038 value = 1; 8039 else if (tls_ty != 0) 8040 { 8041 value -= htab->elf.tls_sec->vma + DTP_OFFSET; 8042 if (tls_ty == (TLS_TLS | TLS_TPREL)) 8043 value += DTP_OFFSET - TP_OFFSET; 8044 8045 if (tls_ty == (TLS_TLS | TLS_GD)) 8046 { 8047 bfd_put_32 (output_bfd, value, 8048 htab->got->contents + off + 4); 8049 value = 1; 8050 } 8051 } 8052 bfd_put_32 (output_bfd, value, 8053 htab->got->contents + off); 8054 } 8055 8056 off += 4; 8057 if (tls_ty & (TLS_LD | TLS_GD)) 8058 off += 4; 8059 } 8060 while (tls_m != 0); 8061 8062 off = *offp; 8063 *offp = off | 1; 8064 } 8065 8066 if (off >= (bfd_vma) -2) 8067 abort (); 8068 8069 if ((tls_type & TLS_TLS) != 0) 8070 { 8071 if (tls_type != (TLS_TLS | TLS_LD)) 8072 { 8073 if ((tls_mask & TLS_LD) != 0 8074 && !(h == NULL 8075 || !h->def_dynamic)) 8076 off += 8; 8077 if (tls_type != (TLS_TLS | TLS_GD)) 8078 { 8079 if ((tls_mask & TLS_GD) != 0) 8080 off += 8; 8081 if (tls_type != (TLS_TLS | TLS_DTPREL)) 8082 { 8083 if ((tls_mask & TLS_DTPREL) != 0) 8084 off += 4; 8085 } 8086 } 8087 } 8088 } 8089 8090 relocation = (htab->got->output_section->vma 8091 + htab->got->output_offset 8092 + off 8093 - SYM_VAL (htab->elf.hgot)); 8094 8095 /* Addends on got relocations don't make much sense. 8096 x+off@got is actually x@got+off, and since the got is 8097 generated by a hash table traversal, the value in the 8098 got at entry m+n bears little relation to the entry m. */ 8099 if (addend != 0) 8100 info->callbacks->einfo 8101 (_("%P: %H: non-zero addend on %s reloc against `%s'\n"), 8102 input_bfd, input_section, rel->r_offset, 8103 howto->name, 8104 sym_name); 8105 } 8106 break; 8107 8108 /* Relocations that need no special processing. */ 8109 case R_PPC_LOCAL24PC: 8110 /* It makes no sense to point a local relocation 8111 at a symbol not in this object. */ 8112 if (unresolved_reloc) 8113 { 8114 if (! (*info->callbacks->undefined_symbol) (info, 8115 h->root.root.string, 8116 input_bfd, 8117 input_section, 8118 rel->r_offset, 8119 TRUE)) 8120 return FALSE; 8121 continue; 8122 } 8123 break; 8124 8125 case R_PPC_DTPREL16: 8126 case R_PPC_DTPREL16_LO: 8127 case R_PPC_DTPREL16_HI: 8128 case R_PPC_DTPREL16_HA: 8129 addend -= htab->elf.tls_sec->vma + DTP_OFFSET; 8130 break; 8131 8132 /* Relocations that may need to be propagated if this is a shared 8133 object. */ 8134 case R_PPC_TPREL16: 8135 case R_PPC_TPREL16_LO: 8136 case R_PPC_TPREL16_HI: 8137 case R_PPC_TPREL16_HA: 8138 if (h != NULL 8139 && h->root.type == bfd_link_hash_undefweak 8140 && h->dynindx == -1) 8141 { 8142 /* Make this relocation against an undefined weak symbol 8143 resolve to zero. This is really just a tweak, since 8144 code using weak externs ought to check that they are 8145 defined before using them. */ 8146 bfd_byte *p = contents + rel->r_offset - d_offset; 8147 unsigned int insn = bfd_get_32 (output_bfd, p); 8148 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2); 8149 if (insn != 0) 8150 bfd_put_32 (output_bfd, insn, p); 8151 break; 8152 } 8153 addend -= htab->elf.tls_sec->vma + TP_OFFSET; 8154 /* The TPREL16 relocs shouldn't really be used in shared 8155 libs as they will result in DT_TEXTREL being set, but 8156 support them anyway. */ 8157 goto dodyn; 8158 8159 case R_PPC_TPREL32: 8160 addend -= htab->elf.tls_sec->vma + TP_OFFSET; 8161 goto dodyn; 8162 8163 case R_PPC_DTPREL32: 8164 addend -= htab->elf.tls_sec->vma + DTP_OFFSET; 8165 goto dodyn; 8166 8167 case R_PPC_DTPMOD32: 8168 relocation = 1; 8169 addend = 0; 8170 goto dodyn; 8171 8172 case R_PPC_REL16: 8173 case R_PPC_REL16_LO: 8174 case R_PPC_REL16_HI: 8175 case R_PPC_REL16_HA: 8176 break; 8177 8178 case R_PPC_REL32: 8179 if (h == NULL || h == htab->elf.hgot) 8180 break; 8181 /* fall through */ 8182 8183 case R_PPC_ADDR32: 8184 case R_PPC_ADDR16: 8185 case R_PPC_ADDR16_LO: 8186 case R_PPC_ADDR16_HI: 8187 case R_PPC_ADDR16_HA: 8188 case R_PPC_UADDR32: 8189 case R_PPC_UADDR16: 8190 goto dodyn; 8191 8192 case R_PPC_VLE_REL8: 8193 case R_PPC_VLE_REL15: 8194 case R_PPC_VLE_REL24: 8195 case R_PPC_REL24: 8196 case R_PPC_REL14: 8197 case R_PPC_REL14_BRTAKEN: 8198 case R_PPC_REL14_BRNTAKEN: 8199 /* If these relocations are not to a named symbol, they can be 8200 handled right here, no need to bother the dynamic linker. */ 8201 if (SYMBOL_CALLS_LOCAL (info, h) 8202 || h == htab->elf.hgot) 8203 break; 8204 /* fall through */ 8205 8206 case R_PPC_ADDR24: 8207 case R_PPC_ADDR14: 8208 case R_PPC_ADDR14_BRTAKEN: 8209 case R_PPC_ADDR14_BRNTAKEN: 8210 if (h != NULL && !info->shared) 8211 break; 8212 /* fall through */ 8213 8214 dodyn: 8215 if ((input_section->flags & SEC_ALLOC) == 0 8216 || is_vxworks_tls) 8217 break; 8218 8219 if ((info->shared 8220 && !(h != NULL 8221 && ((h->root.type == bfd_link_hash_undefined 8222 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN 8223 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL)) 8224 || (h->root.type == bfd_link_hash_undefweak 8225 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT))) 8226 && (must_be_dyn_reloc (info, r_type) 8227 || !SYMBOL_CALLS_LOCAL (info, h))) 8228 || (ELIMINATE_COPY_RELOCS 8229 && !info->shared 8230 && h != NULL 8231 && h->dynindx != -1 8232 && !h->non_got_ref 8233 && !h->def_regular)) 8234 { 8235 int skip; 8236 bfd_byte * loc; 8237 #ifdef DEBUG 8238 fprintf (stderr, "ppc_elf_relocate_section needs to " 8239 "create relocation for %s\n", 8240 (h && h->root.root.string 8241 ? h->root.root.string : "<unknown>")); 8242 #endif 8243 8244 /* When generating a shared object, these relocations 8245 are copied into the output file to be resolved at run 8246 time. */ 8247 if (sreloc == NULL) 8248 { 8249 sreloc = elf_section_data (input_section)->sreloc; 8250 if (!htab->elf.dynamic_sections_created) 8251 sreloc = htab->reliplt; 8252 if (sreloc == NULL) 8253 return FALSE; 8254 } 8255 8256 skip = 0; 8257 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info, 8258 input_section, 8259 rel->r_offset); 8260 if (outrel.r_offset == (bfd_vma) -1 8261 || outrel.r_offset == (bfd_vma) -2) 8262 skip = (int) outrel.r_offset; 8263 outrel.r_offset += (input_section->output_section->vma 8264 + input_section->output_offset); 8265 8266 if (skip) 8267 memset (&outrel, 0, sizeof outrel); 8268 else if ((h != NULL 8269 && (h->root.type == bfd_link_hash_undefined 8270 || h->root.type == bfd_link_hash_undefweak)) 8271 || !SYMBOL_REFERENCES_LOCAL (info, h)) 8272 { 8273 BFD_ASSERT (h->dynindx != -1); 8274 unresolved_reloc = FALSE; 8275 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 8276 outrel.r_addend = rel->r_addend; 8277 } 8278 else 8279 { 8280 outrel.r_addend = relocation + rel->r_addend; 8281 8282 if (r_type != R_PPC_ADDR32) 8283 { 8284 long indx = 0; 8285 8286 if (ifunc != NULL) 8287 { 8288 /* If we get here when building a static 8289 executable, then the libc startup function 8290 responsible for applying indirect function 8291 relocations is going to complain about 8292 the reloc type. 8293 If we get here when building a dynamic 8294 executable, it will be because we have 8295 a text relocation. The dynamic loader 8296 will set the text segment writable and 8297 non-executable to apply text relocations. 8298 So we'll segfault when trying to run the 8299 indirection function to resolve the reloc. */ 8300 info->callbacks->einfo 8301 (_("%P: %H: relocation %s for indirect " 8302 "function %s unsupported\n"), 8303 input_bfd, input_section, rel->r_offset, 8304 howto->name, 8305 sym_name); 8306 ret = FALSE; 8307 } 8308 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec)) 8309 ; 8310 else if (sec == NULL || sec->owner == NULL) 8311 { 8312 bfd_set_error (bfd_error_bad_value); 8313 ret = FALSE; 8314 } 8315 else 8316 { 8317 asection *osec; 8318 8319 /* We are turning this relocation into one 8320 against a section symbol. It would be 8321 proper to subtract the symbol's value, 8322 osec->vma, from the emitted reloc addend, 8323 but ld.so expects buggy relocs. 8324 FIXME: Why not always use a zero index? */ 8325 osec = sec->output_section; 8326 indx = elf_section_data (osec)->dynindx; 8327 if (indx == 0) 8328 { 8329 osec = htab->elf.text_index_section; 8330 indx = elf_section_data (osec)->dynindx; 8331 } 8332 BFD_ASSERT (indx != 0); 8333 #ifdef DEBUG 8334 if (indx == 0) 8335 printf ("indx=%ld section=%s flags=%08x name=%s\n", 8336 indx, osec->name, osec->flags, 8337 h->root.root.string); 8338 #endif 8339 } 8340 8341 outrel.r_info = ELF32_R_INFO (indx, r_type); 8342 } 8343 else if (ifunc != NULL) 8344 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); 8345 else 8346 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE); 8347 } 8348 8349 loc = sreloc->contents; 8350 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 8351 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 8352 8353 if (skip == -1) 8354 continue; 8355 8356 /* This reloc will be computed at runtime. We clear the memory 8357 so that it contains predictable value. */ 8358 if (! skip 8359 && ((input_section->flags & SEC_ALLOC) != 0 8360 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE)) 8361 { 8362 relocation = howto->pc_relative ? outrel.r_offset : 0; 8363 addend = 0; 8364 break; 8365 } 8366 } 8367 break; 8368 8369 case R_PPC_RELAX_PLT: 8370 case R_PPC_RELAX_PLTREL24: 8371 if (h != NULL) 8372 { 8373 struct plt_entry *ent; 8374 bfd_vma got2_addend = 0; 8375 8376 if (r_type == R_PPC_RELAX_PLTREL24) 8377 { 8378 if (info->shared) 8379 got2_addend = addend; 8380 addend = 0; 8381 } 8382 ent = find_plt_ent (&h->plt.plist, got2, got2_addend); 8383 if (htab->plt_type == PLT_NEW) 8384 relocation = (htab->glink->output_section->vma 8385 + htab->glink->output_offset 8386 + ent->glink_offset); 8387 else 8388 relocation = (htab->plt->output_section->vma 8389 + htab->plt->output_offset 8390 + ent->plt.offset); 8391 } 8392 /* Fall thru */ 8393 8394 case R_PPC_RELAX: 8395 if (info->shared) 8396 relocation -= (input_section->output_section->vma 8397 + input_section->output_offset 8398 + rel->r_offset - 4); 8399 8400 { 8401 unsigned long t0; 8402 unsigned long t1; 8403 8404 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset); 8405 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4); 8406 8407 /* We're clearing the bits for R_PPC_ADDR16_HA 8408 and R_PPC_ADDR16_LO here. */ 8409 t0 &= ~0xffff; 8410 t1 &= ~0xffff; 8411 8412 /* t0 is HA, t1 is LO */ 8413 relocation += addend; 8414 t0 |= ((relocation + 0x8000) >> 16) & 0xffff; 8415 t1 |= relocation & 0xffff; 8416 8417 bfd_put_32 (output_bfd, t0, contents + rel->r_offset); 8418 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4); 8419 8420 /* Rewrite the reloc and convert one of the trailing nop 8421 relocs to describe this relocation. */ 8422 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE); 8423 /* The relocs are at the bottom 2 bytes */ 8424 rel[0].r_offset += 2; 8425 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel)); 8426 rel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA); 8427 rel[1].r_offset += 4; 8428 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO); 8429 rel++; 8430 } 8431 continue; 8432 8433 /* Indirect .sdata relocation. */ 8434 case R_PPC_EMB_SDAI16: 8435 BFD_ASSERT (htab->sdata[0].section != NULL); 8436 if (!is_static_defined (htab->sdata[0].sym)) 8437 { 8438 unresolved_reloc = TRUE; 8439 break; 8440 } 8441 relocation 8442 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0], 8443 h, relocation, rel); 8444 addend = 0; 8445 break; 8446 8447 /* Indirect .sdata2 relocation. */ 8448 case R_PPC_EMB_SDA2I16: 8449 BFD_ASSERT (htab->sdata[1].section != NULL); 8450 if (!is_static_defined (htab->sdata[1].sym)) 8451 { 8452 unresolved_reloc = TRUE; 8453 break; 8454 } 8455 relocation 8456 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1], 8457 h, relocation, rel); 8458 addend = 0; 8459 break; 8460 8461 /* Handle the TOC16 reloc. We want to use the offset within the .got 8462 section, not the actual VMA. This is appropriate when generating 8463 an embedded ELF object, for which the .got section acts like the 8464 AIX .toc section. */ 8465 case R_PPC_TOC16: /* phony GOT16 relocations */ 8466 if (sec == NULL || sec->output_section == NULL) 8467 { 8468 unresolved_reloc = TRUE; 8469 break; 8470 } 8471 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec), 8472 ".got") == 0 8473 || strcmp (bfd_get_section_name (sec->owner, sec), 8474 ".cgot") == 0); 8475 8476 addend -= sec->output_section->vma + sec->output_offset + 0x8000; 8477 break; 8478 8479 case R_PPC_PLTREL24: 8480 if (h != NULL && ifunc == NULL) 8481 { 8482 struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2, 8483 info->shared ? addend : 0); 8484 if (ent == NULL 8485 || htab->plt == NULL) 8486 { 8487 /* We didn't make a PLT entry for this symbol. This 8488 happens when statically linking PIC code, or when 8489 using -Bsymbolic. */ 8490 } 8491 else 8492 { 8493 /* Relocation is to the entry for this symbol in the 8494 procedure linkage table. */ 8495 unresolved_reloc = FALSE; 8496 if (htab->plt_type == PLT_NEW) 8497 relocation = (htab->glink->output_section->vma 8498 + htab->glink->output_offset 8499 + ent->glink_offset); 8500 else 8501 relocation = (htab->plt->output_section->vma 8502 + htab->plt->output_offset 8503 + ent->plt.offset); 8504 } 8505 } 8506 8507 /* R_PPC_PLTREL24 is rather special. If non-zero, the 8508 addend specifies the GOT pointer offset within .got2. 8509 Don't apply it to the relocation field. */ 8510 addend = 0; 8511 break; 8512 8513 /* Relocate against _SDA_BASE_. */ 8514 case R_PPC_SDAREL16: 8515 { 8516 const char *name; 8517 struct elf_link_hash_entry *sda = htab->sdata[0].sym; 8518 8519 if (sec == NULL 8520 || sec->output_section == NULL 8521 || !is_static_defined (sda)) 8522 { 8523 unresolved_reloc = TRUE; 8524 break; 8525 } 8526 addend -= SYM_VAL (sda); 8527 8528 name = bfd_get_section_name (output_bfd, sec->output_section); 8529 if (! ((CONST_STRNEQ (name, ".sdata") 8530 && (name[6] == 0 || name[6] == '.')) 8531 || (CONST_STRNEQ (name, ".sbss") 8532 && (name[5] == 0 || name[5] == '.')))) 8533 { 8534 info->callbacks->einfo 8535 (_("%P: %B: the target (%s) of a %s relocation is " 8536 "in the wrong output section (%s)\n"), 8537 input_bfd, 8538 sym_name, 8539 howto->name, 8540 name); 8541 } 8542 } 8543 break; 8544 8545 /* Relocate against _SDA2_BASE_. */ 8546 case R_PPC_EMB_SDA2REL: 8547 { 8548 const char *name; 8549 struct elf_link_hash_entry *sda = htab->sdata[1].sym; 8550 8551 if (sec == NULL 8552 || sec->output_section == NULL 8553 || !is_static_defined (sda)) 8554 { 8555 unresolved_reloc = TRUE; 8556 break; 8557 } 8558 addend -= SYM_VAL (sda); 8559 8560 name = bfd_get_section_name (output_bfd, sec->output_section); 8561 if (! (CONST_STRNEQ (name, ".sdata2") 8562 || CONST_STRNEQ (name, ".sbss2"))) 8563 { 8564 info->callbacks->einfo 8565 (_("%P: %B: the target (%s) of a %s relocation is " 8566 "in the wrong output section (%s)\n"), 8567 input_bfd, 8568 sym_name, 8569 howto->name, 8570 name); 8571 } 8572 } 8573 break; 8574 8575 case R_PPC_VLE_LO16A: 8576 relocation = (relocation + addend) & 0xffff; 8577 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset, 8578 relocation, split16a_type); 8579 continue; 8580 8581 case R_PPC_VLE_LO16D: 8582 relocation = (relocation + addend) & 0xffff; 8583 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset, 8584 relocation, split16d_type); 8585 continue; 8586 8587 case R_PPC_VLE_HI16A: 8588 relocation = ((relocation + addend) >> 16) & 0xffff; 8589 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset, 8590 relocation, split16a_type); 8591 continue; 8592 8593 case R_PPC_VLE_HI16D: 8594 relocation = ((relocation + addend) >> 16) & 0xffff; 8595 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset, 8596 relocation, split16d_type); 8597 continue; 8598 8599 case R_PPC_VLE_HA16A: 8600 { 8601 bfd_vma value = relocation + addend; 8602 value = (((value >> 16) + ((value & 0x8000) ? 1 : 0)) & 0xffff); 8603 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset, 8604 value, split16a_type); 8605 } 8606 continue; 8607 8608 case R_PPC_VLE_HA16D: 8609 { 8610 bfd_vma value = relocation + addend; 8611 value = (((value >> 16) + ((value & 0x8000) ? 1 : 0)) & 0xffff); 8612 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset, 8613 value, split16d_type); 8614 } 8615 continue; 8616 8617 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */ 8618 case R_PPC_EMB_SDA21: 8619 case R_PPC_VLE_SDA21: 8620 case R_PPC_EMB_RELSDA: 8621 case R_PPC_VLE_SDA21_LO: 8622 { 8623 const char *name; 8624 int reg; 8625 struct elf_link_hash_entry *sda = NULL; 8626 8627 if (sec == NULL || sec->output_section == NULL) 8628 { 8629 unresolved_reloc = TRUE; 8630 break; 8631 } 8632 8633 name = bfd_get_section_name (output_bfd, sec->output_section); 8634 if (((CONST_STRNEQ (name, ".sdata") 8635 && (name[6] == 0 || name[6] == '.')) 8636 || (CONST_STRNEQ (name, ".sbss") 8637 && (name[5] == 0 || name[5] == '.')))) 8638 { 8639 reg = 13; 8640 sda = htab->sdata[0].sym; 8641 } 8642 else if (CONST_STRNEQ (name, ".sdata2") 8643 || CONST_STRNEQ (name, ".sbss2")) 8644 { 8645 reg = 2; 8646 sda = htab->sdata[1].sym; 8647 } 8648 else if (strcmp (name, ".PPC.EMB.sdata0") == 0 8649 || strcmp (name, ".PPC.EMB.sbss0") == 0) 8650 { 8651 reg = 0; 8652 } 8653 else 8654 { 8655 info->callbacks->einfo 8656 (_("%P: %B: the target (%s) of a %s relocation is " 8657 "in the wrong output section (%s)\n"), 8658 input_bfd, 8659 sym_name, 8660 howto->name, 8661 name); 8662 8663 bfd_set_error (bfd_error_bad_value); 8664 ret = FALSE; 8665 continue; 8666 } 8667 8668 if (sda != NULL) 8669 { 8670 if (!is_static_defined (sda)) 8671 { 8672 unresolved_reloc = TRUE; 8673 break; 8674 } 8675 addend -= SYM_VAL (sda); 8676 } 8677 8678 if (reg == 0 8679 && (r_type == R_PPC_VLE_SDA21 8680 || r_type == R_PPC_VLE_SDA21_LO)) 8681 { 8682 /* Use the split20 format. */ 8683 bfd_vma insn, bits12to15, bits21to31; 8684 bfd_vma value = (relocation + rel->r_offset) & 0xffff; 8685 /* Propagate sign bit, if necessary. */ 8686 insn = (value & 0x8000) ? 0x70107800 : 0x70000000; 8687 bits12to15 = value & 0x700; 8688 bits21to31 = value & 0x7ff; 8689 insn |= bits12to15; 8690 insn |= bits21to31; 8691 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 8692 continue; 8693 } 8694 else if (r_type == R_PPC_EMB_SDA21 8695 || r_type == R_PPC_VLE_SDA21 8696 || r_type == R_PPC_VLE_SDA21_LO) 8697 { 8698 bfd_vma insn; /* Fill in register field. */ 8699 8700 insn = bfd_get_32 (output_bfd, contents + rel->r_offset); 8701 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT); 8702 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 8703 } 8704 } 8705 break; 8706 8707 case R_PPC_VLE_SDAREL_LO16A: 8708 case R_PPC_VLE_SDAREL_LO16D: 8709 case R_PPC_VLE_SDAREL_HI16A: 8710 case R_PPC_VLE_SDAREL_HI16D: 8711 case R_PPC_VLE_SDAREL_HA16A: 8712 case R_PPC_VLE_SDAREL_HA16D: 8713 { 8714 bfd_vma value; 8715 const char *name; 8716 //int reg; 8717 struct elf_link_hash_entry *sda = NULL; 8718 8719 if (sec == NULL || sec->output_section == NULL) 8720 { 8721 unresolved_reloc = TRUE; 8722 break; 8723 } 8724 8725 name = bfd_get_section_name (output_bfd, sec->output_section); 8726 if (((CONST_STRNEQ (name, ".sdata") 8727 && (name[6] == 0 || name[6] == '.')) 8728 || (CONST_STRNEQ (name, ".sbss") 8729 && (name[5] == 0 || name[5] == '.')))) 8730 { 8731 //reg = 13; 8732 sda = htab->sdata[0].sym; 8733 } 8734 else if (CONST_STRNEQ (name, ".sdata2") 8735 || CONST_STRNEQ (name, ".sbss2")) 8736 { 8737 //reg = 2; 8738 sda = htab->sdata[1].sym; 8739 } 8740 else 8741 { 8742 (*_bfd_error_handler) 8743 (_("%B: the target (%s) of a %s relocation is " 8744 "in the wrong output section (%s)"), 8745 input_bfd, 8746 sym_name, 8747 howto->name, 8748 name); 8749 8750 bfd_set_error (bfd_error_bad_value); 8751 ret = FALSE; 8752 continue; 8753 } 8754 8755 if (sda != NULL) 8756 { 8757 if (!is_static_defined (sda)) 8758 { 8759 unresolved_reloc = TRUE; 8760 break; 8761 } 8762 } 8763 8764 value = sda->root.u.def.section->output_section->vma 8765 + sda->root.u.def.section->output_offset; 8766 8767 if (r_type == R_PPC_VLE_SDAREL_LO16A) 8768 { 8769 value = (value + addend) & 0xffff; 8770 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset, 8771 value, split16a_type); 8772 } 8773 else if (r_type == R_PPC_VLE_SDAREL_LO16D) 8774 { 8775 value = (value + addend) & 0xffff; 8776 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset, 8777 value, split16d_type); 8778 } 8779 else if (r_type == R_PPC_VLE_SDAREL_HI16A) 8780 { 8781 value = ((value + addend) >> 16) & 0xffff; 8782 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset, 8783 value, split16a_type); 8784 } 8785 else if (r_type == R_PPC_VLE_SDAREL_HI16D) 8786 { 8787 value = ((value + addend) >> 16) & 0xffff; 8788 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset, 8789 value, split16d_type); 8790 } 8791 else if (r_type == R_PPC_VLE_SDAREL_HA16A) 8792 { 8793 value += addend; 8794 value = (((value >> 16) + ((value & 0x8000) ? 1 : 0)) & 0xffff); 8795 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset, 8796 value, split16a_type); 8797 } 8798 else if (r_type == R_PPC_VLE_SDAREL_HA16D) 8799 { 8800 value += addend; 8801 value = (((value >> 16) + ((value & 0x8000) ? 1 : 0)) & 0xffff); 8802 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset, 8803 value, split16d_type); 8804 } 8805 } 8806 continue; 8807 8808 /* Relocate against the beginning of the section. */ 8809 case R_PPC_SECTOFF: 8810 case R_PPC_SECTOFF_LO: 8811 case R_PPC_SECTOFF_HI: 8812 case R_PPC_SECTOFF_HA: 8813 if (sec == NULL || sec->output_section == NULL) 8814 { 8815 unresolved_reloc = TRUE; 8816 break; 8817 } 8818 addend -= sec->output_section->vma; 8819 break; 8820 8821 /* Negative relocations. */ 8822 case R_PPC_EMB_NADDR32: 8823 case R_PPC_EMB_NADDR16: 8824 case R_PPC_EMB_NADDR16_LO: 8825 case R_PPC_EMB_NADDR16_HI: 8826 case R_PPC_EMB_NADDR16_HA: 8827 addend -= 2 * relocation; 8828 break; 8829 8830 case R_PPC_COPY: 8831 case R_PPC_GLOB_DAT: 8832 case R_PPC_JMP_SLOT: 8833 case R_PPC_RELATIVE: 8834 case R_PPC_IRELATIVE: 8835 case R_PPC_PLT32: 8836 case R_PPC_PLTREL32: 8837 case R_PPC_PLT16_LO: 8838 case R_PPC_PLT16_HI: 8839 case R_PPC_PLT16_HA: 8840 case R_PPC_ADDR30: 8841 case R_PPC_EMB_RELSEC16: 8842 case R_PPC_EMB_RELST_LO: 8843 case R_PPC_EMB_RELST_HI: 8844 case R_PPC_EMB_RELST_HA: 8845 case R_PPC_EMB_BIT_FLD: 8846 info->callbacks->einfo 8847 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"), 8848 input_bfd, 8849 howto->name, 8850 sym_name); 8851 8852 bfd_set_error (bfd_error_invalid_operation); 8853 ret = FALSE; 8854 continue; 8855 } 8856 8857 /* Do any further special processing. */ 8858 switch (r_type) 8859 { 8860 default: 8861 break; 8862 8863 case R_PPC_ADDR16_HA: 8864 case R_PPC_REL16_HA: 8865 case R_PPC_SECTOFF_HA: 8866 case R_PPC_TPREL16_HA: 8867 case R_PPC_DTPREL16_HA: 8868 case R_PPC_EMB_NADDR16_HA: 8869 case R_PPC_EMB_RELST_HA: 8870 /* It's just possible that this symbol is a weak symbol 8871 that's not actually defined anywhere. In that case, 8872 'sec' would be NULL, and we should leave the symbol 8873 alone (it will be set to zero elsewhere in the link). */ 8874 if (sec == NULL) 8875 break; 8876 /* Fall thru */ 8877 8878 case R_PPC_PLT16_HA: 8879 case R_PPC_GOT16_HA: 8880 case R_PPC_GOT_TLSGD16_HA: 8881 case R_PPC_GOT_TLSLD16_HA: 8882 case R_PPC_GOT_TPREL16_HA: 8883 case R_PPC_GOT_DTPREL16_HA: 8884 /* Add 0x10000 if sign bit in 0:15 is set. 8885 Bits 0:15 are not used. */ 8886 addend += 0x8000; 8887 break; 8888 8889 case R_PPC_ADDR16: 8890 case R_PPC_ADDR16_LO: 8891 case R_PPC_GOT16: 8892 case R_PPC_GOT16_LO: 8893 case R_PPC_SDAREL16: 8894 case R_PPC_SECTOFF: 8895 case R_PPC_SECTOFF_LO: 8896 case R_PPC_DTPREL16: 8897 case R_PPC_DTPREL16_LO: 8898 case R_PPC_TPREL16: 8899 case R_PPC_TPREL16_LO: 8900 case R_PPC_GOT_TLSGD16: 8901 case R_PPC_GOT_TLSGD16_LO: 8902 case R_PPC_GOT_TLSLD16: 8903 case R_PPC_GOT_TLSLD16_LO: 8904 case R_PPC_GOT_DTPREL16: 8905 case R_PPC_GOT_DTPREL16_LO: 8906 case R_PPC_GOT_TPREL16: 8907 case R_PPC_GOT_TPREL16_LO: 8908 { 8909 /* The 32-bit ABI lacks proper relocations to deal with 8910 certain 64-bit instructions. Prevent damage to bits 8911 that make up part of the insn opcode. */ 8912 unsigned int insn, mask, lobit; 8913 8914 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset); 8915 mask = 0; 8916 if (is_insn_ds_form (insn)) 8917 mask = 3; 8918 else if (is_insn_dq_form (insn)) 8919 mask = 15; 8920 else 8921 break; 8922 lobit = mask & (relocation + addend); 8923 if (lobit != 0) 8924 { 8925 addend -= lobit; 8926 info->callbacks->einfo 8927 (_("%P: %H: error: %s against `%s' not a multiple of %u\n"), 8928 input_bfd, input_section, rel->r_offset, 8929 howto->name, sym_name, mask + 1); 8930 bfd_set_error (bfd_error_bad_value); 8931 ret = FALSE; 8932 } 8933 addend += insn & mask; 8934 } 8935 break; 8936 } 8937 8938 #ifdef DEBUG 8939 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, " 8940 "offset = %ld, addend = %ld\n", 8941 howto->name, 8942 (int) r_type, 8943 sym_name, 8944 r_symndx, 8945 (long) rel->r_offset, 8946 (long) addend); 8947 #endif 8948 8949 if (unresolved_reloc 8950 && !((input_section->flags & SEC_DEBUGGING) != 0 8951 && h->def_dynamic) 8952 && _bfd_elf_section_offset (output_bfd, info, input_section, 8953 rel->r_offset) != (bfd_vma) -1) 8954 { 8955 info->callbacks->einfo 8956 (_("%P: %H: unresolvable %s relocation against symbol `%s'\n"), 8957 input_bfd, input_section, rel->r_offset, 8958 howto->name, 8959 sym_name); 8960 ret = FALSE; 8961 } 8962 8963 r = _bfd_final_link_relocate (howto, 8964 input_bfd, 8965 input_section, 8966 contents, 8967 rel->r_offset, 8968 relocation, 8969 addend); 8970 8971 if (r != bfd_reloc_ok) 8972 { 8973 if (r == bfd_reloc_overflow) 8974 { 8975 if (warned) 8976 continue; 8977 if (h != NULL 8978 && h->root.type == bfd_link_hash_undefweak 8979 && howto->pc_relative) 8980 { 8981 /* Assume this is a call protected by other code that 8982 detect the symbol is undefined. If this is the case, 8983 we can safely ignore the overflow. If not, the 8984 program is hosed anyway, and a little warning isn't 8985 going to help. */ 8986 8987 continue; 8988 } 8989 8990 if (! (*info->callbacks->reloc_overflow) (info, 8991 (h ? &h->root : NULL), 8992 sym_name, 8993 howto->name, 8994 rel->r_addend, 8995 input_bfd, 8996 input_section, 8997 rel->r_offset)) 8998 return FALSE; 8999 } 9000 else 9001 { 9002 info->callbacks->einfo 9003 (_("%P: %H: %s reloc against `%s': error %d\n"), 9004 input_bfd, input_section, rel->r_offset, 9005 howto->name, sym_name, (int) r); 9006 ret = FALSE; 9007 } 9008 } 9009 } 9010 9011 #ifdef DEBUG 9012 fprintf (stderr, "\n"); 9013 #endif 9014 9015 return ret; 9016 } 9017 9018 /* Finish up dynamic symbol handling. We set the contents of various 9019 dynamic sections here. */ 9020 9021 static bfd_boolean 9022 ppc_elf_finish_dynamic_symbol (bfd *output_bfd, 9023 struct bfd_link_info *info, 9024 struct elf_link_hash_entry *h, 9025 Elf_Internal_Sym *sym) 9026 { 9027 struct ppc_elf_link_hash_table *htab; 9028 struct plt_entry *ent; 9029 bfd_boolean doneone; 9030 9031 #ifdef DEBUG 9032 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s", 9033 h->root.root.string); 9034 #endif 9035 9036 htab = ppc_elf_hash_table (info); 9037 BFD_ASSERT (htab->elf.dynobj != NULL); 9038 9039 doneone = FALSE; 9040 for (ent = h->plt.plist; ent != NULL; ent = ent->next) 9041 if (ent->plt.offset != (bfd_vma) -1) 9042 { 9043 if (!doneone) 9044 { 9045 Elf_Internal_Rela rela; 9046 bfd_byte *loc; 9047 bfd_vma reloc_index; 9048 9049 if (htab->plt_type == PLT_NEW 9050 || !htab->elf.dynamic_sections_created 9051 || h->dynindx == -1) 9052 reloc_index = ent->plt.offset / 4; 9053 else 9054 { 9055 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size) 9056 / htab->plt_slot_size); 9057 if (reloc_index > PLT_NUM_SINGLE_ENTRIES 9058 && htab->plt_type == PLT_OLD) 9059 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2; 9060 } 9061 9062 /* This symbol has an entry in the procedure linkage table. 9063 Set it up. */ 9064 if (htab->plt_type == PLT_VXWORKS 9065 && htab->elf.dynamic_sections_created 9066 && h->dynindx != -1) 9067 { 9068 bfd_vma got_offset; 9069 const bfd_vma *plt_entry; 9070 9071 /* The first three entries in .got.plt are reserved. */ 9072 got_offset = (reloc_index + 3) * 4; 9073 9074 /* Use the right PLT. */ 9075 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry 9076 : ppc_elf_vxworks_plt_entry; 9077 9078 /* Fill in the .plt on VxWorks. */ 9079 if (info->shared) 9080 { 9081 bfd_put_32 (output_bfd, 9082 plt_entry[0] | PPC_HA (got_offset), 9083 htab->plt->contents + ent->plt.offset + 0); 9084 bfd_put_32 (output_bfd, 9085 plt_entry[1] | PPC_LO (got_offset), 9086 htab->plt->contents + ent->plt.offset + 4); 9087 } 9088 else 9089 { 9090 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot); 9091 9092 bfd_put_32 (output_bfd, 9093 plt_entry[0] | PPC_HA (got_loc), 9094 htab->plt->contents + ent->plt.offset + 0); 9095 bfd_put_32 (output_bfd, 9096 plt_entry[1] | PPC_LO (got_loc), 9097 htab->plt->contents + ent->plt.offset + 4); 9098 } 9099 9100 bfd_put_32 (output_bfd, plt_entry[2], 9101 htab->plt->contents + ent->plt.offset + 8); 9102 bfd_put_32 (output_bfd, plt_entry[3], 9103 htab->plt->contents + ent->plt.offset + 12); 9104 9105 /* This instruction is an immediate load. The value loaded is 9106 the byte offset of the R_PPC_JMP_SLOT relocation from the 9107 start of the .rela.plt section. The value is stored in the 9108 low-order 16 bits of the load instruction. */ 9109 /* NOTE: It appears that this is now an index rather than a 9110 prescaled offset. */ 9111 bfd_put_32 (output_bfd, 9112 plt_entry[4] | reloc_index, 9113 htab->plt->contents + ent->plt.offset + 16); 9114 /* This instruction is a PC-relative branch whose target is 9115 the start of the PLT section. The address of this branch 9116 instruction is 20 bytes beyond the start of this PLT entry. 9117 The address is encoded in bits 6-29, inclusive. The value 9118 stored is right-shifted by two bits, permitting a 26-bit 9119 offset. */ 9120 bfd_put_32 (output_bfd, 9121 (plt_entry[5] 9122 | (-(ent->plt.offset + 20) & 0x03fffffc)), 9123 htab->plt->contents + ent->plt.offset + 20); 9124 bfd_put_32 (output_bfd, plt_entry[6], 9125 htab->plt->contents + ent->plt.offset + 24); 9126 bfd_put_32 (output_bfd, plt_entry[7], 9127 htab->plt->contents + ent->plt.offset + 28); 9128 9129 /* Fill in the GOT entry corresponding to this PLT slot with 9130 the address immediately after the "bctr" instruction 9131 in this PLT entry. */ 9132 bfd_put_32 (output_bfd, (htab->plt->output_section->vma 9133 + htab->plt->output_offset 9134 + ent->plt.offset + 16), 9135 htab->sgotplt->contents + got_offset); 9136 9137 if (!info->shared) 9138 { 9139 /* Fill in a couple of entries in .rela.plt.unloaded. */ 9140 loc = htab->srelplt2->contents 9141 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index 9142 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS) 9143 * sizeof (Elf32_External_Rela)); 9144 9145 /* Provide the @ha relocation for the first instruction. */ 9146 rela.r_offset = (htab->plt->output_section->vma 9147 + htab->plt->output_offset 9148 + ent->plt.offset + 2); 9149 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, 9150 R_PPC_ADDR16_HA); 9151 rela.r_addend = got_offset; 9152 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 9153 loc += sizeof (Elf32_External_Rela); 9154 9155 /* Provide the @l relocation for the second instruction. */ 9156 rela.r_offset = (htab->plt->output_section->vma 9157 + htab->plt->output_offset 9158 + ent->plt.offset + 6); 9159 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, 9160 R_PPC_ADDR16_LO); 9161 rela.r_addend = got_offset; 9162 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 9163 loc += sizeof (Elf32_External_Rela); 9164 9165 /* Provide a relocation for the GOT entry corresponding to this 9166 PLT slot. Point it at the middle of the .plt entry. */ 9167 rela.r_offset = (htab->sgotplt->output_section->vma 9168 + htab->sgotplt->output_offset 9169 + got_offset); 9170 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx, 9171 R_PPC_ADDR32); 9172 rela.r_addend = ent->plt.offset + 16; 9173 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 9174 } 9175 9176 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT. 9177 In particular, the offset for the relocation is not the 9178 address of the PLT entry for this function, as specified 9179 by the ABI. Instead, the offset is set to the address of 9180 the GOT slot for this function. See EABI 4.4.4.1. */ 9181 rela.r_offset = (htab->sgotplt->output_section->vma 9182 + htab->sgotplt->output_offset 9183 + got_offset); 9184 9185 } 9186 else 9187 { 9188 asection *splt = htab->plt; 9189 if (!htab->elf.dynamic_sections_created 9190 || h->dynindx == -1) 9191 splt = htab->iplt; 9192 9193 rela.r_offset = (splt->output_section->vma 9194 + splt->output_offset 9195 + ent->plt.offset); 9196 if (htab->plt_type == PLT_OLD 9197 || !htab->elf.dynamic_sections_created 9198 || h->dynindx == -1) 9199 { 9200 /* We don't need to fill in the .plt. The ppc dynamic 9201 linker will fill it in. */ 9202 } 9203 else 9204 { 9205 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset 9206 + htab->glink->output_section->vma 9207 + htab->glink->output_offset); 9208 bfd_put_32 (output_bfd, val, 9209 splt->contents + ent->plt.offset); 9210 } 9211 } 9212 9213 /* Fill in the entry in the .rela.plt section. */ 9214 rela.r_addend = 0; 9215 if (!htab->elf.dynamic_sections_created 9216 || h->dynindx == -1) 9217 { 9218 BFD_ASSERT (h->type == STT_GNU_IFUNC 9219 && h->def_regular 9220 && (h->root.type == bfd_link_hash_defined 9221 || h->root.type == bfd_link_hash_defweak)); 9222 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); 9223 rela.r_addend = SYM_VAL (h); 9224 } 9225 else 9226 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT); 9227 9228 if (!htab->elf.dynamic_sections_created 9229 || h->dynindx == -1) 9230 loc = (htab->reliplt->contents 9231 + (htab->reliplt->reloc_count++ 9232 * sizeof (Elf32_External_Rela))); 9233 else 9234 loc = (htab->relplt->contents 9235 + reloc_index * sizeof (Elf32_External_Rela)); 9236 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 9237 9238 if (!h->def_regular) 9239 { 9240 /* Mark the symbol as undefined, rather than as 9241 defined in the .plt section. Leave the value if 9242 there were any relocations where pointer equality 9243 matters (this is a clue for the dynamic linker, to 9244 make function pointer comparisons work between an 9245 application and shared library), otherwise set it 9246 to zero. */ 9247 sym->st_shndx = SHN_UNDEF; 9248 if (!h->pointer_equality_needed) 9249 sym->st_value = 0; 9250 else if (!h->ref_regular_nonweak) 9251 { 9252 /* This breaks function pointer comparisons, but 9253 that is better than breaking tests for a NULL 9254 function pointer. */ 9255 sym->st_value = 0; 9256 } 9257 } 9258 else if (h->type == STT_GNU_IFUNC 9259 && !info->shared) 9260 { 9261 /* Set the value of ifunc symbols in a non-pie 9262 executable to the glink entry. This is to avoid 9263 text relocations. We can't do this for ifunc in 9264 allocate_dynrelocs, as we do for normal dynamic 9265 function symbols with plt entries, because we need 9266 to keep the original value around for the ifunc 9267 relocation. */ 9268 sym->st_shndx = (_bfd_elf_section_from_bfd_section 9269 (output_bfd, htab->glink->output_section)); 9270 sym->st_value = (ent->glink_offset 9271 + htab->glink->output_offset 9272 + htab->glink->output_section->vma); 9273 } 9274 doneone = TRUE; 9275 } 9276 9277 if (htab->plt_type == PLT_NEW 9278 || !htab->elf.dynamic_sections_created 9279 || h->dynindx == -1) 9280 { 9281 unsigned char *p; 9282 asection *splt = htab->plt; 9283 if (!htab->elf.dynamic_sections_created 9284 || h->dynindx == -1) 9285 splt = htab->iplt; 9286 9287 p = (unsigned char *) htab->glink->contents + ent->glink_offset; 9288 9289 if (h == htab->tls_get_addr && !htab->no_tls_get_addr_opt) 9290 { 9291 bfd_put_32 (output_bfd, LWZ_11_3, p); 9292 p += 4; 9293 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p); 9294 p += 4; 9295 bfd_put_32 (output_bfd, MR_0_3, p); 9296 p += 4; 9297 bfd_put_32 (output_bfd, CMPWI_11_0, p); 9298 p += 4; 9299 bfd_put_32 (output_bfd, ADD_3_12_2, p); 9300 p += 4; 9301 bfd_put_32 (output_bfd, BEQLR, p); 9302 p += 4; 9303 bfd_put_32 (output_bfd, MR_3_0, p); 9304 p += 4; 9305 bfd_put_32 (output_bfd, NOP, p); 9306 p += 4; 9307 } 9308 9309 write_glink_stub (ent, splt, p, info); 9310 9311 if (!info->shared) 9312 /* We only need one non-PIC glink stub. */ 9313 break; 9314 } 9315 else 9316 break; 9317 } 9318 9319 if (h->needs_copy) 9320 { 9321 asection *s; 9322 Elf_Internal_Rela rela; 9323 bfd_byte *loc; 9324 9325 /* This symbols needs a copy reloc. Set it up. */ 9326 9327 #ifdef DEBUG 9328 fprintf (stderr, ", copy"); 9329 #endif 9330 9331 BFD_ASSERT (h->dynindx != -1); 9332 9333 if (ppc_elf_hash_entry (h)->has_sda_refs) 9334 s = htab->relsbss; 9335 else 9336 s = htab->relbss; 9337 BFD_ASSERT (s != NULL); 9338 9339 rela.r_offset = SYM_VAL (h); 9340 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY); 9341 rela.r_addend = 0; 9342 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); 9343 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 9344 } 9345 9346 #ifdef DEBUG 9347 fprintf (stderr, "\n"); 9348 #endif 9349 9350 return TRUE; 9351 } 9352 9353 static enum elf_reloc_type_class 9354 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela) 9355 { 9356 switch (ELF32_R_TYPE (rela->r_info)) 9357 { 9358 case R_PPC_RELATIVE: 9359 return reloc_class_relative; 9360 case R_PPC_REL24: 9361 case R_PPC_ADDR24: 9362 case R_PPC_JMP_SLOT: 9363 return reloc_class_plt; 9364 case R_PPC_COPY: 9365 return reloc_class_copy; 9366 default: 9367 return reloc_class_normal; 9368 } 9369 } 9370 9371 /* Finish up the dynamic sections. */ 9372 9373 static bfd_boolean 9374 ppc_elf_finish_dynamic_sections (bfd *output_bfd, 9375 struct bfd_link_info *info) 9376 { 9377 asection *sdyn; 9378 asection *splt; 9379 struct ppc_elf_link_hash_table *htab; 9380 bfd_vma got; 9381 bfd *dynobj; 9382 bfd_boolean ret = TRUE; 9383 9384 #ifdef DEBUG 9385 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n"); 9386 #endif 9387 9388 htab = ppc_elf_hash_table (info); 9389 dynobj = elf_hash_table (info)->dynobj; 9390 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 9391 if (htab->is_vxworks) 9392 splt = bfd_get_linker_section (dynobj, ".plt"); 9393 else 9394 splt = NULL; 9395 9396 got = 0; 9397 if (htab->elf.hgot != NULL) 9398 got = SYM_VAL (htab->elf.hgot); 9399 9400 if (htab->elf.dynamic_sections_created) 9401 { 9402 Elf32_External_Dyn *dyncon, *dynconend; 9403 9404 BFD_ASSERT (htab->plt != NULL && sdyn != NULL); 9405 9406 dyncon = (Elf32_External_Dyn *) sdyn->contents; 9407 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); 9408 for (; dyncon < dynconend; dyncon++) 9409 { 9410 Elf_Internal_Dyn dyn; 9411 asection *s; 9412 9413 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); 9414 9415 switch (dyn.d_tag) 9416 { 9417 case DT_PLTGOT: 9418 if (htab->is_vxworks) 9419 s = htab->sgotplt; 9420 else 9421 s = htab->plt; 9422 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 9423 break; 9424 9425 case DT_PLTRELSZ: 9426 dyn.d_un.d_val = htab->relplt->size; 9427 break; 9428 9429 case DT_JMPREL: 9430 s = htab->relplt; 9431 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 9432 break; 9433 9434 case DT_PPC_GOT: 9435 dyn.d_un.d_ptr = got; 9436 break; 9437 9438 case DT_RELASZ: 9439 if (htab->is_vxworks) 9440 { 9441 if (htab->relplt) 9442 dyn.d_un.d_ptr -= htab->relplt->size; 9443 break; 9444 } 9445 continue; 9446 9447 default: 9448 if (htab->is_vxworks 9449 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn)) 9450 break; 9451 continue; 9452 } 9453 9454 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 9455 } 9456 } 9457 9458 if (htab->got != NULL) 9459 { 9460 if (htab->elf.hgot->root.u.def.section == htab->got 9461 || htab->elf.hgot->root.u.def.section == htab->sgotplt) 9462 { 9463 unsigned char *p = htab->elf.hgot->root.u.def.section->contents; 9464 9465 p += htab->elf.hgot->root.u.def.value; 9466 if (htab->plt_type == PLT_OLD) 9467 { 9468 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 9469 so that a function can easily find the address of 9470 _GLOBAL_OFFSET_TABLE_. */ 9471 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4 9472 < htab->elf.hgot->root.u.def.section->size); 9473 bfd_put_32 (output_bfd, 0x4e800021, p - 4); 9474 } 9475 9476 if (sdyn != NULL) 9477 { 9478 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset; 9479 BFD_ASSERT (htab->elf.hgot->root.u.def.value 9480 < htab->elf.hgot->root.u.def.section->size); 9481 bfd_put_32 (output_bfd, val, p); 9482 } 9483 } 9484 else 9485 { 9486 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"), 9487 htab->elf.hgot->root.root.string, 9488 (htab->sgotplt != NULL 9489 ? htab->sgotplt->name : htab->got->name)); 9490 bfd_set_error (bfd_error_bad_value); 9491 ret = FALSE; 9492 } 9493 9494 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4; 9495 } 9496 9497 /* Fill in the first entry in the VxWorks procedure linkage table. */ 9498 if (splt && splt->size > 0) 9499 { 9500 /* Use the right PLT. */ 9501 const bfd_vma *plt_entry = (info->shared 9502 ? ppc_elf_vxworks_pic_plt0_entry 9503 : ppc_elf_vxworks_plt0_entry); 9504 9505 if (!info->shared) 9506 { 9507 bfd_vma got_value = SYM_VAL (htab->elf.hgot); 9508 9509 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value), 9510 splt->contents + 0); 9511 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value), 9512 splt->contents + 4); 9513 } 9514 else 9515 { 9516 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0); 9517 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4); 9518 } 9519 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8); 9520 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12); 9521 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16); 9522 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20); 9523 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24); 9524 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28); 9525 9526 if (! info->shared) 9527 { 9528 Elf_Internal_Rela rela; 9529 bfd_byte *loc; 9530 9531 loc = htab->srelplt2->contents; 9532 9533 /* Output the @ha relocation for the first instruction. */ 9534 rela.r_offset = (htab->plt->output_section->vma 9535 + htab->plt->output_offset 9536 + 2); 9537 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA); 9538 rela.r_addend = 0; 9539 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 9540 loc += sizeof (Elf32_External_Rela); 9541 9542 /* Output the @l relocation for the second instruction. */ 9543 rela.r_offset = (htab->plt->output_section->vma 9544 + htab->plt->output_offset 9545 + 6); 9546 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO); 9547 rela.r_addend = 0; 9548 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 9549 loc += sizeof (Elf32_External_Rela); 9550 9551 /* Fix up the remaining relocations. They may have the wrong 9552 symbol index for _G_O_T_ or _P_L_T_ depending on the order 9553 in which symbols were output. */ 9554 while (loc < htab->srelplt2->contents + htab->srelplt2->size) 9555 { 9556 Elf_Internal_Rela rel; 9557 9558 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); 9559 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA); 9560 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); 9561 loc += sizeof (Elf32_External_Rela); 9562 9563 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); 9564 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO); 9565 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); 9566 loc += sizeof (Elf32_External_Rela); 9567 9568 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); 9569 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32); 9570 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); 9571 loc += sizeof (Elf32_External_Rela); 9572 } 9573 } 9574 } 9575 9576 if (htab->glink != NULL 9577 && htab->glink->contents != NULL 9578 && htab->elf.dynamic_sections_created) 9579 { 9580 unsigned char *p; 9581 unsigned char *endp; 9582 bfd_vma res0; 9583 unsigned int i; 9584 9585 /* 9586 * PIC glink code is the following: 9587 * 9588 * # ith PLT code stub. 9589 * addis 11,30,(plt+(i-1)*4-got)@ha 9590 * lwz 11,(plt+(i-1)*4-got)@l(11) 9591 * mtctr 11 9592 * bctr 9593 * 9594 * # A table of branches, one for each plt entry. 9595 * # The idea is that the plt call stub loads ctr and r11 with these 9596 * # addresses, so (r11 - res_0) gives the plt index * 4. 9597 * res_0: b PLTresolve 9598 * res_1: b PLTresolve 9599 * . 9600 * # Some number of entries towards the end can be nops 9601 * res_n_m3: nop 9602 * res_n_m2: nop 9603 * res_n_m1: 9604 * 9605 * PLTresolve: 9606 * addis 11,11,(1f-res_0)@ha 9607 * mflr 0 9608 * bcl 20,31,1f 9609 * 1: addi 11,11,(1b-res_0)@l 9610 * mflr 12 9611 * mtlr 0 9612 * sub 11,11,12 # r11 = index * 4 9613 * addis 12,12,(got+4-1b)@ha 9614 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve 9615 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address 9616 * mtctr 0 9617 * add 0,11,11 9618 * add 11,0,11 # r11 = index * 12 = reloc offset. 9619 * bctr 9620 */ 9621 static const unsigned int pic_plt_resolve[] = 9622 { 9623 ADDIS_11_11, 9624 MFLR_0, 9625 BCL_20_31, 9626 ADDI_11_11, 9627 MFLR_12, 9628 MTLR_0, 9629 SUB_11_11_12, 9630 ADDIS_12_12, 9631 LWZ_0_12, 9632 LWZ_12_12, 9633 MTCTR_0, 9634 ADD_0_11_11, 9635 ADD_11_0_11, 9636 BCTR, 9637 NOP, 9638 NOP 9639 }; 9640 9641 /* 9642 * Non-PIC glink code is a little simpler. 9643 * 9644 * # ith PLT code stub. 9645 * lis 11,(plt+(i-1)*4)@ha 9646 * lwz 11,(plt+(i-1)*4)@l(11) 9647 * mtctr 11 9648 * bctr 9649 * 9650 * The branch table is the same, then comes 9651 * 9652 * PLTresolve: 9653 * lis 12,(got+4)@ha 9654 * addis 11,11,(-res_0)@ha 9655 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve 9656 * addi 11,11,(-res_0)@l # r11 = index * 4 9657 * mtctr 0 9658 * add 0,11,11 9659 * lwz 12,(got+8)@l(12) # got[2] contains the map address 9660 * add 11,0,11 # r11 = index * 12 = reloc offset. 9661 * bctr 9662 */ 9663 static const unsigned int plt_resolve[] = 9664 { 9665 LIS_12, 9666 ADDIS_11_11, 9667 LWZ_0_12, 9668 ADDI_11_11, 9669 MTCTR_0, 9670 ADD_0_11_11, 9671 LWZ_12_12, 9672 ADD_11_0_11, 9673 BCTR, 9674 NOP, 9675 NOP, 9676 NOP, 9677 NOP, 9678 NOP, 9679 NOP, 9680 NOP 9681 }; 9682 9683 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4) 9684 abort (); 9685 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4) 9686 abort (); 9687 9688 /* Build the branch table, one for each plt entry (less one), 9689 and perhaps some padding. */ 9690 p = htab->glink->contents; 9691 p += htab->glink_pltresolve; 9692 endp = htab->glink->contents; 9693 endp += htab->glink->size - GLINK_PLTRESOLVE; 9694 while (p < endp - 8 * 4) 9695 { 9696 bfd_put_32 (output_bfd, B + endp - p, p); 9697 p += 4; 9698 } 9699 while (p < endp) 9700 { 9701 bfd_put_32 (output_bfd, NOP, p); 9702 p += 4; 9703 } 9704 9705 res0 = (htab->glink_pltresolve 9706 + htab->glink->output_section->vma 9707 + htab->glink->output_offset); 9708 9709 /* Last comes the PLTresolve stub. */ 9710 if (info->shared) 9711 { 9712 bfd_vma bcl; 9713 9714 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++) 9715 { 9716 bfd_put_32 (output_bfd, pic_plt_resolve[i], p); 9717 p += 4; 9718 } 9719 p -= 4 * ARRAY_SIZE (pic_plt_resolve); 9720 9721 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4 9722 + htab->glink->output_section->vma 9723 + htab->glink->output_offset); 9724 9725 bfd_put_32 (output_bfd, 9726 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4); 9727 bfd_put_32 (output_bfd, 9728 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4); 9729 bfd_put_32 (output_bfd, 9730 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4); 9731 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl)) 9732 { 9733 bfd_put_32 (output_bfd, 9734 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4); 9735 bfd_put_32 (output_bfd, 9736 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4); 9737 } 9738 else 9739 { 9740 bfd_put_32 (output_bfd, 9741 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4); 9742 bfd_put_32 (output_bfd, 9743 LWZ_12_12 + 4, p + 9*4); 9744 } 9745 } 9746 else 9747 { 9748 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++) 9749 { 9750 bfd_put_32 (output_bfd, plt_resolve[i], p); 9751 p += 4; 9752 } 9753 p -= 4 * ARRAY_SIZE (plt_resolve); 9754 9755 bfd_put_32 (output_bfd, 9756 LIS_12 + PPC_HA (got + 4), p + 0*4); 9757 bfd_put_32 (output_bfd, 9758 ADDIS_11_11 + PPC_HA (-res0), p + 1*4); 9759 bfd_put_32 (output_bfd, 9760 ADDI_11_11 + PPC_LO (-res0), p + 3*4); 9761 if (PPC_HA (got + 4) == PPC_HA (got + 8)) 9762 { 9763 bfd_put_32 (output_bfd, 9764 LWZ_0_12 + PPC_LO (got + 4), p + 2*4); 9765 bfd_put_32 (output_bfd, 9766 LWZ_12_12 + PPC_LO (got + 8), p + 6*4); 9767 } 9768 else 9769 { 9770 bfd_put_32 (output_bfd, 9771 LWZU_0_12 + PPC_LO (got + 4), p + 2*4); 9772 bfd_put_32 (output_bfd, 9773 LWZ_12_12 + 4, p + 6*4); 9774 } 9775 } 9776 } 9777 9778 if (htab->glink_eh_frame != NULL 9779 && htab->glink_eh_frame->contents != NULL) 9780 { 9781 unsigned char *p = htab->glink_eh_frame->contents; 9782 bfd_vma val; 9783 9784 p += sizeof (glink_eh_frame_cie); 9785 /* FDE length. */ 9786 p += 4; 9787 /* CIE pointer. */ 9788 p += 4; 9789 /* Offset to .glink. */ 9790 val = (htab->glink->output_section->vma 9791 + htab->glink->output_offset); 9792 val -= (htab->glink_eh_frame->output_section->vma 9793 + htab->glink_eh_frame->output_offset); 9794 val -= p - htab->glink_eh_frame->contents; 9795 bfd_put_32 (htab->elf.dynobj, val, p); 9796 9797 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME 9798 && !_bfd_elf_write_section_eh_frame (output_bfd, info, 9799 htab->glink_eh_frame, 9800 htab->glink_eh_frame->contents)) 9801 return FALSE; 9802 } 9803 9804 return ret; 9805 } 9806 9807 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec 9808 #define TARGET_LITTLE_NAME "elf32-powerpcle" 9809 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec 9810 #define TARGET_BIG_NAME "elf32-powerpc" 9811 #define ELF_ARCH bfd_arch_powerpc 9812 #define ELF_TARGET_ID PPC32_ELF_DATA 9813 #define ELF_MACHINE_CODE EM_PPC 9814 #ifdef __QNXTARGET__ 9815 #define ELF_MAXPAGESIZE 0x1000 9816 #else 9817 #define ELF_MAXPAGESIZE 0x10000 9818 #endif 9819 #define ELF_MINPAGESIZE 0x1000 9820 #define ELF_COMMONPAGESIZE 0x1000 9821 #define elf_info_to_howto ppc_elf_info_to_howto 9822 9823 #ifdef EM_CYGNUS_POWERPC 9824 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC 9825 #endif 9826 9827 #ifdef EM_PPC_OLD 9828 #define ELF_MACHINE_ALT2 EM_PPC_OLD 9829 #endif 9830 9831 #define elf_backend_plt_not_loaded 1 9832 #define elf_backend_can_gc_sections 1 9833 #define elf_backend_can_refcount 1 9834 #define elf_backend_rela_normal 1 9835 9836 #define bfd_elf32_mkobject ppc_elf_mkobject 9837 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data 9838 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section 9839 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup 9840 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup 9841 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags 9842 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create 9843 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab 9844 9845 #define elf_backend_object_p ppc_elf_object_p 9846 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook 9847 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook 9848 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr 9849 #define elf_backend_relocate_section ppc_elf_relocate_section 9850 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections 9851 #define elf_backend_check_relocs ppc_elf_check_relocs 9852 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol 9853 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol 9854 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook 9855 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections 9856 #define elf_backend_hash_symbol ppc_elf_hash_symbol 9857 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol 9858 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections 9859 #define elf_backend_fake_sections ppc_elf_fake_sections 9860 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers 9861 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map 9862 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus 9863 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo 9864 #define elf_backend_write_core_note ppc_elf_write_core_note 9865 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class 9866 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing 9867 #define elf_backend_final_write_processing ppc_elf_final_write_processing 9868 #define elf_backend_write_section ppc_elf_write_section 9869 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr 9870 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val 9871 #define elf_backend_action_discarded ppc_elf_action_discarded 9872 #define elf_backend_init_index_section _bfd_elf_init_1_index_section 9873 #define elf_backend_post_process_headers _bfd_elf_set_osabi 9874 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags 9875 #define elf_backend_section_processing ppc_elf_section_processing 9876 9877 #include "elf32-target.h" 9878 9879 /* FreeBSD Target */ 9880 9881 #undef TARGET_LITTLE_SYM 9882 #undef TARGET_LITTLE_NAME 9883 9884 #undef TARGET_BIG_SYM 9885 #define TARGET_BIG_SYM bfd_elf32_powerpc_freebsd_vec 9886 #undef TARGET_BIG_NAME 9887 #define TARGET_BIG_NAME "elf32-powerpc-freebsd" 9888 9889 #undef ELF_OSABI 9890 #define ELF_OSABI ELFOSABI_FREEBSD 9891 9892 #undef elf32_bed 9893 #define elf32_bed elf32_powerpc_fbsd_bed 9894 9895 #include "elf32-target.h" 9896 9897 /* VxWorks Target */ 9898 9899 #undef TARGET_LITTLE_SYM 9900 #undef TARGET_LITTLE_NAME 9901 9902 #undef TARGET_BIG_SYM 9903 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec 9904 #undef TARGET_BIG_NAME 9905 #define TARGET_BIG_NAME "elf32-powerpc-vxworks" 9906 9907 #undef ELF_OSABI 9908 9909 /* VxWorks uses the elf default section flags for .plt. */ 9910 static const struct bfd_elf_special_section * 9911 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec) 9912 { 9913 if (sec->name == NULL) 9914 return NULL; 9915 9916 if (strcmp (sec->name, ".plt") == 0) 9917 return _bfd_elf_get_sec_type_attr (abfd, sec); 9918 9919 return ppc_elf_get_sec_type_attr (abfd, sec); 9920 } 9921 9922 /* Like ppc_elf_link_hash_table_create, but overrides 9923 appropriately for VxWorks. */ 9924 static struct bfd_link_hash_table * 9925 ppc_elf_vxworks_link_hash_table_create (bfd *abfd) 9926 { 9927 struct bfd_link_hash_table *ret; 9928 9929 ret = ppc_elf_link_hash_table_create (abfd); 9930 if (ret) 9931 { 9932 struct ppc_elf_link_hash_table *htab 9933 = (struct ppc_elf_link_hash_table *)ret; 9934 htab->is_vxworks = 1; 9935 htab->plt_type = PLT_VXWORKS; 9936 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE; 9937 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE; 9938 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE; 9939 } 9940 return ret; 9941 } 9942 9943 /* Tweak magic VxWorks symbols as they are loaded. */ 9944 static bfd_boolean 9945 ppc_elf_vxworks_add_symbol_hook (bfd *abfd, 9946 struct bfd_link_info *info, 9947 Elf_Internal_Sym *sym, 9948 const char **namep ATTRIBUTE_UNUSED, 9949 flagword *flagsp ATTRIBUTE_UNUSED, 9950 asection **secp, 9951 bfd_vma *valp) 9952 { 9953 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, 9954 valp)) 9955 return FALSE; 9956 9957 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp); 9958 } 9959 9960 static void 9961 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker) 9962 { 9963 ppc_elf_final_write_processing(abfd, linker); 9964 elf_vxworks_final_write_processing(abfd, linker); 9965 } 9966 9967 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so 9968 define it. */ 9969 #undef elf_backend_want_plt_sym 9970 #define elf_backend_want_plt_sym 1 9971 #undef elf_backend_want_got_plt 9972 #define elf_backend_want_got_plt 1 9973 #undef elf_backend_got_symbol_offset 9974 #define elf_backend_got_symbol_offset 0 9975 #undef elf_backend_plt_not_loaded 9976 #define elf_backend_plt_not_loaded 0 9977 #undef elf_backend_plt_readonly 9978 #define elf_backend_plt_readonly 1 9979 #undef elf_backend_got_header_size 9980 #define elf_backend_got_header_size 12 9981 9982 #undef bfd_elf32_get_synthetic_symtab 9983 9984 #undef bfd_elf32_bfd_link_hash_table_create 9985 #define bfd_elf32_bfd_link_hash_table_create \ 9986 ppc_elf_vxworks_link_hash_table_create 9987 #undef elf_backend_add_symbol_hook 9988 #define elf_backend_add_symbol_hook \ 9989 ppc_elf_vxworks_add_symbol_hook 9990 #undef elf_backend_link_output_symbol_hook 9991 #define elf_backend_link_output_symbol_hook \ 9992 elf_vxworks_link_output_symbol_hook 9993 #undef elf_backend_final_write_processing 9994 #define elf_backend_final_write_processing \ 9995 ppc_elf_vxworks_final_write_processing 9996 #undef elf_backend_get_sec_type_attr 9997 #define elf_backend_get_sec_type_attr \ 9998 ppc_elf_vxworks_get_sec_type_attr 9999 #undef elf_backend_emit_relocs 10000 #define elf_backend_emit_relocs \ 10001 elf_vxworks_emit_relocs 10002 10003 #undef elf32_bed 10004 #define elf32_bed ppc_elf_vxworks_bed 10005 #undef elf_backend_post_process_headers 10006 10007 #include "elf32-target.h" 10008