1 /* PowerPC-specific support for 32-bit ELF 2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 3 2004, 2005, 2006 Free Software Foundation, Inc. 4 Written by Ian Lance Taylor, Cygnus Support. 5 6 This file is part of BFD, the Binary File Descriptor library. 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 2 of the License, or 11 (at your option) any later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with this program; if not, write to the 20 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, 21 Boston, MA 02110-1301, USA. */ 22 23 /* This file is based on a preliminary PowerPC ELF ABI. The 24 information may not match the final PowerPC ELF ABI. It includes 25 suggestions from the in-progress Embedded PowerPC ABI, and that 26 information may also not match. */ 27 28 #include "bfd.h" 29 #include "sysdep.h" 30 #include "bfdlink.h" 31 #include "libbfd.h" 32 #include "elf-bfd.h" 33 #include "elf/ppc.h" 34 #include "elf32-ppc.h" 35 #include "elf-vxworks.h" 36 37 /* RELA relocations are used here. */ 38 39 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc 40 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 41 static bfd_reloc_status_type ppc_elf_unhandled_reloc 42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 43 44 /* Branch prediction bit for branch taken relocs. */ 45 #define BRANCH_PREDICT_BIT 0x200000 46 /* Mask to set RA in memory instructions. */ 47 #define RA_REGISTER_MASK 0x001f0000 48 /* Value to shift register by to insert RA. */ 49 #define RA_REGISTER_SHIFT 16 50 51 /* The name of the dynamic interpreter. This is put in the .interp 52 section. */ 53 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" 54 55 /* For old-style PLT. */ 56 /* The number of single-slot PLT entries (the rest use two slots). */ 57 #define PLT_NUM_SINGLE_ENTRIES 8192 58 59 /* For new-style .glink and .plt. */ 60 #define GLINK_PLTRESOLVE 16*4 61 #define GLINK_ENTRY_SIZE 4*4 62 63 /* VxWorks uses its own plt layout, filled in by the static linker. */ 64 65 /* The standard VxWorks PLT entry. */ 66 #define VXWORKS_PLT_ENTRY_SIZE 32 67 static const bfd_vma ppc_elf_vxworks_plt_entry 68 [VXWORKS_PLT_ENTRY_SIZE / 4] = 69 { 70 0x3d800000, /* lis r12,0 */ 71 0x818c0000, /* lwz r12,0(r12) */ 72 0x7d8903a6, /* mtctr r12 */ 73 0x4e800420, /* bctr */ 74 0x39600000, /* li r11,0 */ 75 0x48000000, /* b 14 <.PLT0resolve+0x4> */ 76 0x60000000, /* nop */ 77 0x60000000, /* nop */ 78 }; 79 static const bfd_vma ppc_elf_vxworks_pic_plt_entry 80 [VXWORKS_PLT_ENTRY_SIZE / 4] = 81 { 82 0x3d9e0000, /* addis r12,r30,0 */ 83 0x818c0000, /* lwz r12,0(r12) */ 84 0x7d8903a6, /* mtctr r12 */ 85 0x4e800420, /* bctr */ 86 0x39600000, /* li r11,0 */ 87 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */ 88 0x60000000, /* nop */ 89 0x60000000, /* nop */ 90 }; 91 92 /* The initial VxWorks PLT entry. */ 93 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32 94 static const bfd_vma ppc_elf_vxworks_plt0_entry 95 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] = 96 { 97 0x3d800000, /* lis r12,0 */ 98 0x398c0000, /* addi r12,r12,0 */ 99 0x800c0008, /* lwz r0,8(r12) */ 100 0x7c0903a6, /* mtctr r0 */ 101 0x818c0004, /* lwz r12,4(r12) */ 102 0x4e800420, /* bctr */ 103 0x60000000, /* nop */ 104 0x60000000, /* nop */ 105 }; 106 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry 107 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] = 108 { 109 0x819e0008, /* lwz r12,8(r30) */ 110 0x7d8903a6, /* mtctr r12 */ 111 0x819e0004, /* lwz r12,4(r30) */ 112 0x4e800420, /* bctr */ 113 0x60000000, /* nop */ 114 0x60000000, /* nop */ 115 0x60000000, /* nop */ 116 0x60000000, /* nop */ 117 }; 118 119 /* For executables, we have some additional relocations in 120 .rela.plt.unloaded, for the kernel loader. */ 121 122 /* The number of non-JMP_SLOT relocations per PLT0 slot. */ 123 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3 124 /* The number of relocations in the PLTResolve slot. */ 125 #define VXWORKS_PLTRESOLVE_RELOCS 2 126 /* The number of relocations in the PLTResolve slot when when creating 127 a shared library. */ 128 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0 129 130 /* Some instructions. */ 131 #define ADDIS_11_11 0x3d6b0000 132 #define ADDIS_11_30 0x3d7e0000 133 #define ADDIS_12_12 0x3d8c0000 134 #define ADDI_11_11 0x396b0000 135 #define ADD_0_11_11 0x7c0b5a14 136 #define ADD_11_0_11 0x7d605a14 137 #define B 0x48000000 138 #define BCL_20_31 0x429f0005 139 #define BCTR 0x4e800420 140 #define LIS_11 0x3d600000 141 #define LIS_12 0x3d800000 142 #define LWZU_0_12 0x840c0000 143 #define LWZ_0_12 0x800c0000 144 #define LWZ_11_11 0x816b0000 145 #define LWZ_11_30 0x817e0000 146 #define LWZ_12_12 0x818c0000 147 #define MFLR_0 0x7c0802a6 148 #define MFLR_12 0x7d8802a6 149 #define MTCTR_0 0x7c0903a6 150 #define MTCTR_11 0x7d6903a6 151 #define MTLR_0 0x7c0803a6 152 #define NOP 0x60000000 153 #define SUB_11_11_12 0x7d6c5850 154 155 /* Offset of tp and dtp pointers from start of TLS block. */ 156 #define TP_OFFSET 0x7000 157 #define DTP_OFFSET 0x8000 158 159 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max]; 160 161 static reloc_howto_type ppc_elf_howto_raw[] = { 162 /* This reloc does nothing. */ 163 HOWTO (R_PPC_NONE, /* type */ 164 0, /* rightshift */ 165 2, /* size (0 = byte, 1 = short, 2 = long) */ 166 32, /* bitsize */ 167 FALSE, /* pc_relative */ 168 0, /* bitpos */ 169 complain_overflow_bitfield, /* complain_on_overflow */ 170 bfd_elf_generic_reloc, /* special_function */ 171 "R_PPC_NONE", /* name */ 172 FALSE, /* partial_inplace */ 173 0, /* src_mask */ 174 0, /* dst_mask */ 175 FALSE), /* pcrel_offset */ 176 177 /* A standard 32 bit relocation. */ 178 HOWTO (R_PPC_ADDR32, /* type */ 179 0, /* rightshift */ 180 2, /* size (0 = byte, 1 = short, 2 = long) */ 181 32, /* bitsize */ 182 FALSE, /* pc_relative */ 183 0, /* bitpos */ 184 complain_overflow_bitfield, /* complain_on_overflow */ 185 bfd_elf_generic_reloc, /* special_function */ 186 "R_PPC_ADDR32", /* name */ 187 FALSE, /* partial_inplace */ 188 0, /* src_mask */ 189 0xffffffff, /* dst_mask */ 190 FALSE), /* pcrel_offset */ 191 192 /* An absolute 26 bit branch; the lower two bits must be zero. 193 FIXME: we don't check that, we just clear them. */ 194 HOWTO (R_PPC_ADDR24, /* type */ 195 0, /* rightshift */ 196 2, /* size (0 = byte, 1 = short, 2 = long) */ 197 26, /* bitsize */ 198 FALSE, /* pc_relative */ 199 0, /* bitpos */ 200 complain_overflow_bitfield, /* complain_on_overflow */ 201 bfd_elf_generic_reloc, /* special_function */ 202 "R_PPC_ADDR24", /* name */ 203 FALSE, /* partial_inplace */ 204 0, /* src_mask */ 205 0x3fffffc, /* dst_mask */ 206 FALSE), /* pcrel_offset */ 207 208 /* A standard 16 bit relocation. */ 209 HOWTO (R_PPC_ADDR16, /* type */ 210 0, /* rightshift */ 211 1, /* size (0 = byte, 1 = short, 2 = long) */ 212 16, /* bitsize */ 213 FALSE, /* pc_relative */ 214 0, /* bitpos */ 215 complain_overflow_bitfield, /* complain_on_overflow */ 216 bfd_elf_generic_reloc, /* special_function */ 217 "R_PPC_ADDR16", /* name */ 218 FALSE, /* partial_inplace */ 219 0, /* src_mask */ 220 0xffff, /* dst_mask */ 221 FALSE), /* pcrel_offset */ 222 223 /* A 16 bit relocation without overflow. */ 224 HOWTO (R_PPC_ADDR16_LO, /* type */ 225 0, /* rightshift */ 226 1, /* size (0 = byte, 1 = short, 2 = long) */ 227 16, /* bitsize */ 228 FALSE, /* pc_relative */ 229 0, /* bitpos */ 230 complain_overflow_dont,/* complain_on_overflow */ 231 bfd_elf_generic_reloc, /* special_function */ 232 "R_PPC_ADDR16_LO", /* name */ 233 FALSE, /* partial_inplace */ 234 0, /* src_mask */ 235 0xffff, /* dst_mask */ 236 FALSE), /* pcrel_offset */ 237 238 /* The high order 16 bits of an address. */ 239 HOWTO (R_PPC_ADDR16_HI, /* type */ 240 16, /* rightshift */ 241 1, /* size (0 = byte, 1 = short, 2 = long) */ 242 16, /* bitsize */ 243 FALSE, /* pc_relative */ 244 0, /* bitpos */ 245 complain_overflow_dont, /* complain_on_overflow */ 246 bfd_elf_generic_reloc, /* special_function */ 247 "R_PPC_ADDR16_HI", /* name */ 248 FALSE, /* partial_inplace */ 249 0, /* src_mask */ 250 0xffff, /* dst_mask */ 251 FALSE), /* pcrel_offset */ 252 253 /* The high order 16 bits of an address, plus 1 if the contents of 254 the low 16 bits, treated as a signed number, is negative. */ 255 HOWTO (R_PPC_ADDR16_HA, /* type */ 256 16, /* rightshift */ 257 1, /* size (0 = byte, 1 = short, 2 = long) */ 258 16, /* bitsize */ 259 FALSE, /* pc_relative */ 260 0, /* bitpos */ 261 complain_overflow_dont, /* complain_on_overflow */ 262 ppc_elf_addr16_ha_reloc, /* special_function */ 263 "R_PPC_ADDR16_HA", /* name */ 264 FALSE, /* partial_inplace */ 265 0, /* src_mask */ 266 0xffff, /* dst_mask */ 267 FALSE), /* pcrel_offset */ 268 269 /* An absolute 16 bit branch; the lower two bits must be zero. 270 FIXME: we don't check that, we just clear them. */ 271 HOWTO (R_PPC_ADDR14, /* type */ 272 0, /* rightshift */ 273 2, /* size (0 = byte, 1 = short, 2 = long) */ 274 16, /* bitsize */ 275 FALSE, /* pc_relative */ 276 0, /* bitpos */ 277 complain_overflow_bitfield, /* complain_on_overflow */ 278 bfd_elf_generic_reloc, /* special_function */ 279 "R_PPC_ADDR14", /* name */ 280 FALSE, /* partial_inplace */ 281 0, /* src_mask */ 282 0xfffc, /* dst_mask */ 283 FALSE), /* pcrel_offset */ 284 285 /* An absolute 16 bit branch, for which bit 10 should be set to 286 indicate that the branch is expected to be taken. The lower two 287 bits must be zero. */ 288 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */ 289 0, /* rightshift */ 290 2, /* size (0 = byte, 1 = short, 2 = long) */ 291 16, /* bitsize */ 292 FALSE, /* pc_relative */ 293 0, /* bitpos */ 294 complain_overflow_bitfield, /* complain_on_overflow */ 295 bfd_elf_generic_reloc, /* special_function */ 296 "R_PPC_ADDR14_BRTAKEN",/* name */ 297 FALSE, /* partial_inplace */ 298 0, /* src_mask */ 299 0xfffc, /* dst_mask */ 300 FALSE), /* pcrel_offset */ 301 302 /* An absolute 16 bit branch, for which bit 10 should be set to 303 indicate that the branch is not expected to be taken. The lower 304 two bits must be zero. */ 305 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */ 306 0, /* rightshift */ 307 2, /* size (0 = byte, 1 = short, 2 = long) */ 308 16, /* bitsize */ 309 FALSE, /* pc_relative */ 310 0, /* bitpos */ 311 complain_overflow_bitfield, /* complain_on_overflow */ 312 bfd_elf_generic_reloc, /* special_function */ 313 "R_PPC_ADDR14_BRNTAKEN",/* name */ 314 FALSE, /* partial_inplace */ 315 0, /* src_mask */ 316 0xfffc, /* dst_mask */ 317 FALSE), /* pcrel_offset */ 318 319 /* A relative 26 bit branch; the lower two bits must be zero. */ 320 HOWTO (R_PPC_REL24, /* type */ 321 0, /* rightshift */ 322 2, /* size (0 = byte, 1 = short, 2 = long) */ 323 26, /* bitsize */ 324 TRUE, /* pc_relative */ 325 0, /* bitpos */ 326 complain_overflow_signed, /* complain_on_overflow */ 327 bfd_elf_generic_reloc, /* special_function */ 328 "R_PPC_REL24", /* name */ 329 FALSE, /* partial_inplace */ 330 0, /* src_mask */ 331 0x3fffffc, /* dst_mask */ 332 TRUE), /* pcrel_offset */ 333 334 /* A relative 16 bit branch; the lower two bits must be zero. */ 335 HOWTO (R_PPC_REL14, /* type */ 336 0, /* rightshift */ 337 2, /* size (0 = byte, 1 = short, 2 = long) */ 338 16, /* bitsize */ 339 TRUE, /* pc_relative */ 340 0, /* bitpos */ 341 complain_overflow_signed, /* complain_on_overflow */ 342 bfd_elf_generic_reloc, /* special_function */ 343 "R_PPC_REL14", /* name */ 344 FALSE, /* partial_inplace */ 345 0, /* src_mask */ 346 0xfffc, /* dst_mask */ 347 TRUE), /* pcrel_offset */ 348 349 /* A relative 16 bit branch. Bit 10 should be set to indicate that 350 the branch is expected to be taken. The lower two bits must be 351 zero. */ 352 HOWTO (R_PPC_REL14_BRTAKEN, /* type */ 353 0, /* rightshift */ 354 2, /* size (0 = byte, 1 = short, 2 = long) */ 355 16, /* bitsize */ 356 TRUE, /* pc_relative */ 357 0, /* bitpos */ 358 complain_overflow_signed, /* complain_on_overflow */ 359 bfd_elf_generic_reloc, /* special_function */ 360 "R_PPC_REL14_BRTAKEN", /* name */ 361 FALSE, /* partial_inplace */ 362 0, /* src_mask */ 363 0xfffc, /* dst_mask */ 364 TRUE), /* pcrel_offset */ 365 366 /* A relative 16 bit branch. Bit 10 should be set to indicate that 367 the branch is not expected to be taken. The lower two bits must 368 be zero. */ 369 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */ 370 0, /* rightshift */ 371 2, /* size (0 = byte, 1 = short, 2 = long) */ 372 16, /* bitsize */ 373 TRUE, /* pc_relative */ 374 0, /* bitpos */ 375 complain_overflow_signed, /* complain_on_overflow */ 376 bfd_elf_generic_reloc, /* special_function */ 377 "R_PPC_REL14_BRNTAKEN",/* name */ 378 FALSE, /* partial_inplace */ 379 0, /* src_mask */ 380 0xfffc, /* dst_mask */ 381 TRUE), /* pcrel_offset */ 382 383 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the 384 symbol. */ 385 HOWTO (R_PPC_GOT16, /* type */ 386 0, /* rightshift */ 387 1, /* size (0 = byte, 1 = short, 2 = long) */ 388 16, /* bitsize */ 389 FALSE, /* pc_relative */ 390 0, /* bitpos */ 391 complain_overflow_signed, /* complain_on_overflow */ 392 bfd_elf_generic_reloc, /* special_function */ 393 "R_PPC_GOT16", /* name */ 394 FALSE, /* partial_inplace */ 395 0, /* src_mask */ 396 0xffff, /* dst_mask */ 397 FALSE), /* pcrel_offset */ 398 399 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for 400 the symbol. */ 401 HOWTO (R_PPC_GOT16_LO, /* type */ 402 0, /* rightshift */ 403 1, /* size (0 = byte, 1 = short, 2 = long) */ 404 16, /* bitsize */ 405 FALSE, /* pc_relative */ 406 0, /* bitpos */ 407 complain_overflow_dont, /* complain_on_overflow */ 408 bfd_elf_generic_reloc, /* special_function */ 409 "R_PPC_GOT16_LO", /* name */ 410 FALSE, /* partial_inplace */ 411 0, /* src_mask */ 412 0xffff, /* dst_mask */ 413 FALSE), /* pcrel_offset */ 414 415 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for 416 the symbol. */ 417 HOWTO (R_PPC_GOT16_HI, /* type */ 418 16, /* rightshift */ 419 1, /* size (0 = byte, 1 = short, 2 = long) */ 420 16, /* bitsize */ 421 FALSE, /* pc_relative */ 422 0, /* bitpos */ 423 complain_overflow_bitfield, /* complain_on_overflow */ 424 bfd_elf_generic_reloc, /* special_function */ 425 "R_PPC_GOT16_HI", /* name */ 426 FALSE, /* partial_inplace */ 427 0, /* src_mask */ 428 0xffff, /* dst_mask */ 429 FALSE), /* pcrel_offset */ 430 431 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for 432 the symbol. */ 433 HOWTO (R_PPC_GOT16_HA, /* type */ 434 16, /* rightshift */ 435 1, /* size (0 = byte, 1 = short, 2 = long) */ 436 16, /* bitsize */ 437 FALSE, /* pc_relative */ 438 0, /* bitpos */ 439 complain_overflow_bitfield, /* complain_on_overflow */ 440 ppc_elf_addr16_ha_reloc, /* special_function */ 441 "R_PPC_GOT16_HA", /* name */ 442 FALSE, /* partial_inplace */ 443 0, /* src_mask */ 444 0xffff, /* dst_mask */ 445 FALSE), /* pcrel_offset */ 446 447 /* Like R_PPC_REL24, but referring to the procedure linkage table 448 entry for the symbol. */ 449 HOWTO (R_PPC_PLTREL24, /* type */ 450 0, /* rightshift */ 451 2, /* size (0 = byte, 1 = short, 2 = long) */ 452 26, /* bitsize */ 453 TRUE, /* pc_relative */ 454 0, /* bitpos */ 455 complain_overflow_signed, /* complain_on_overflow */ 456 bfd_elf_generic_reloc, /* special_function */ 457 "R_PPC_PLTREL24", /* name */ 458 FALSE, /* partial_inplace */ 459 0, /* src_mask */ 460 0x3fffffc, /* dst_mask */ 461 TRUE), /* pcrel_offset */ 462 463 /* This is used only by the dynamic linker. The symbol should exist 464 both in the object being run and in some shared library. The 465 dynamic linker copies the data addressed by the symbol from the 466 shared library into the object, because the object being 467 run has to have the data at some particular address. */ 468 HOWTO (R_PPC_COPY, /* type */ 469 0, /* rightshift */ 470 2, /* size (0 = byte, 1 = short, 2 = long) */ 471 32, /* bitsize */ 472 FALSE, /* pc_relative */ 473 0, /* bitpos */ 474 complain_overflow_bitfield, /* complain_on_overflow */ 475 bfd_elf_generic_reloc, /* special_function */ 476 "R_PPC_COPY", /* name */ 477 FALSE, /* partial_inplace */ 478 0, /* src_mask */ 479 0, /* dst_mask */ 480 FALSE), /* pcrel_offset */ 481 482 /* Like R_PPC_ADDR32, but used when setting global offset table 483 entries. */ 484 HOWTO (R_PPC_GLOB_DAT, /* type */ 485 0, /* rightshift */ 486 2, /* size (0 = byte, 1 = short, 2 = long) */ 487 32, /* bitsize */ 488 FALSE, /* pc_relative */ 489 0, /* bitpos */ 490 complain_overflow_bitfield, /* complain_on_overflow */ 491 bfd_elf_generic_reloc, /* special_function */ 492 "R_PPC_GLOB_DAT", /* name */ 493 FALSE, /* partial_inplace */ 494 0, /* src_mask */ 495 0xffffffff, /* dst_mask */ 496 FALSE), /* pcrel_offset */ 497 498 /* Marks a procedure linkage table entry for a symbol. */ 499 HOWTO (R_PPC_JMP_SLOT, /* type */ 500 0, /* rightshift */ 501 2, /* size (0 = byte, 1 = short, 2 = long) */ 502 32, /* bitsize */ 503 FALSE, /* pc_relative */ 504 0, /* bitpos */ 505 complain_overflow_bitfield, /* complain_on_overflow */ 506 bfd_elf_generic_reloc, /* special_function */ 507 "R_PPC_JMP_SLOT", /* name */ 508 FALSE, /* partial_inplace */ 509 0, /* src_mask */ 510 0, /* dst_mask */ 511 FALSE), /* pcrel_offset */ 512 513 /* Used only by the dynamic linker. When the object is run, this 514 longword is set to the load address of the object, plus the 515 addend. */ 516 HOWTO (R_PPC_RELATIVE, /* type */ 517 0, /* rightshift */ 518 2, /* size (0 = byte, 1 = short, 2 = long) */ 519 32, /* bitsize */ 520 FALSE, /* pc_relative */ 521 0, /* bitpos */ 522 complain_overflow_bitfield, /* complain_on_overflow */ 523 bfd_elf_generic_reloc, /* special_function */ 524 "R_PPC_RELATIVE", /* name */ 525 FALSE, /* partial_inplace */ 526 0, /* src_mask */ 527 0xffffffff, /* dst_mask */ 528 FALSE), /* pcrel_offset */ 529 530 /* Like R_PPC_REL24, but uses the value of the symbol within the 531 object rather than the final value. Normally used for 532 _GLOBAL_OFFSET_TABLE_. */ 533 HOWTO (R_PPC_LOCAL24PC, /* type */ 534 0, /* rightshift */ 535 2, /* size (0 = byte, 1 = short, 2 = long) */ 536 26, /* bitsize */ 537 TRUE, /* pc_relative */ 538 0, /* bitpos */ 539 complain_overflow_signed, /* complain_on_overflow */ 540 bfd_elf_generic_reloc, /* special_function */ 541 "R_PPC_LOCAL24PC", /* name */ 542 FALSE, /* partial_inplace */ 543 0, /* src_mask */ 544 0x3fffffc, /* dst_mask */ 545 TRUE), /* pcrel_offset */ 546 547 /* Like R_PPC_ADDR32, but may be unaligned. */ 548 HOWTO (R_PPC_UADDR32, /* type */ 549 0, /* rightshift */ 550 2, /* size (0 = byte, 1 = short, 2 = long) */ 551 32, /* bitsize */ 552 FALSE, /* pc_relative */ 553 0, /* bitpos */ 554 complain_overflow_bitfield, /* complain_on_overflow */ 555 bfd_elf_generic_reloc, /* special_function */ 556 "R_PPC_UADDR32", /* name */ 557 FALSE, /* partial_inplace */ 558 0, /* src_mask */ 559 0xffffffff, /* dst_mask */ 560 FALSE), /* pcrel_offset */ 561 562 /* Like R_PPC_ADDR16, but may be unaligned. */ 563 HOWTO (R_PPC_UADDR16, /* type */ 564 0, /* rightshift */ 565 1, /* size (0 = byte, 1 = short, 2 = long) */ 566 16, /* bitsize */ 567 FALSE, /* pc_relative */ 568 0, /* bitpos */ 569 complain_overflow_bitfield, /* complain_on_overflow */ 570 bfd_elf_generic_reloc, /* special_function */ 571 "R_PPC_UADDR16", /* name */ 572 FALSE, /* partial_inplace */ 573 0, /* src_mask */ 574 0xffff, /* dst_mask */ 575 FALSE), /* pcrel_offset */ 576 577 /* 32-bit PC relative */ 578 HOWTO (R_PPC_REL32, /* type */ 579 0, /* rightshift */ 580 2, /* size (0 = byte, 1 = short, 2 = long) */ 581 32, /* bitsize */ 582 TRUE, /* pc_relative */ 583 0, /* bitpos */ 584 complain_overflow_bitfield, /* complain_on_overflow */ 585 bfd_elf_generic_reloc, /* special_function */ 586 "R_PPC_REL32", /* name */ 587 FALSE, /* partial_inplace */ 588 0, /* src_mask */ 589 0xffffffff, /* dst_mask */ 590 TRUE), /* pcrel_offset */ 591 592 /* 32-bit relocation to the symbol's procedure linkage table. 593 FIXME: not supported. */ 594 HOWTO (R_PPC_PLT32, /* type */ 595 0, /* rightshift */ 596 2, /* size (0 = byte, 1 = short, 2 = long) */ 597 32, /* bitsize */ 598 FALSE, /* pc_relative */ 599 0, /* bitpos */ 600 complain_overflow_bitfield, /* complain_on_overflow */ 601 bfd_elf_generic_reloc, /* special_function */ 602 "R_PPC_PLT32", /* name */ 603 FALSE, /* partial_inplace */ 604 0, /* src_mask */ 605 0, /* dst_mask */ 606 FALSE), /* pcrel_offset */ 607 608 /* 32-bit PC relative relocation to the symbol's procedure linkage table. 609 FIXME: not supported. */ 610 HOWTO (R_PPC_PLTREL32, /* type */ 611 0, /* rightshift */ 612 2, /* size (0 = byte, 1 = short, 2 = long) */ 613 32, /* bitsize */ 614 TRUE, /* pc_relative */ 615 0, /* bitpos */ 616 complain_overflow_bitfield, /* complain_on_overflow */ 617 bfd_elf_generic_reloc, /* special_function */ 618 "R_PPC_PLTREL32", /* name */ 619 FALSE, /* partial_inplace */ 620 0, /* src_mask */ 621 0, /* dst_mask */ 622 TRUE), /* pcrel_offset */ 623 624 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for 625 the symbol. */ 626 HOWTO (R_PPC_PLT16_LO, /* type */ 627 0, /* rightshift */ 628 1, /* size (0 = byte, 1 = short, 2 = long) */ 629 16, /* bitsize */ 630 FALSE, /* pc_relative */ 631 0, /* bitpos */ 632 complain_overflow_dont, /* complain_on_overflow */ 633 bfd_elf_generic_reloc, /* special_function */ 634 "R_PPC_PLT16_LO", /* name */ 635 FALSE, /* partial_inplace */ 636 0, /* src_mask */ 637 0xffff, /* dst_mask */ 638 FALSE), /* pcrel_offset */ 639 640 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for 641 the symbol. */ 642 HOWTO (R_PPC_PLT16_HI, /* type */ 643 16, /* rightshift */ 644 1, /* size (0 = byte, 1 = short, 2 = long) */ 645 16, /* bitsize */ 646 FALSE, /* pc_relative */ 647 0, /* bitpos */ 648 complain_overflow_bitfield, /* complain_on_overflow */ 649 bfd_elf_generic_reloc, /* special_function */ 650 "R_PPC_PLT16_HI", /* name */ 651 FALSE, /* partial_inplace */ 652 0, /* src_mask */ 653 0xffff, /* dst_mask */ 654 FALSE), /* pcrel_offset */ 655 656 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for 657 the symbol. */ 658 HOWTO (R_PPC_PLT16_HA, /* type */ 659 16, /* rightshift */ 660 1, /* size (0 = byte, 1 = short, 2 = long) */ 661 16, /* bitsize */ 662 FALSE, /* pc_relative */ 663 0, /* bitpos */ 664 complain_overflow_bitfield, /* complain_on_overflow */ 665 ppc_elf_addr16_ha_reloc, /* special_function */ 666 "R_PPC_PLT16_HA", /* name */ 667 FALSE, /* partial_inplace */ 668 0, /* src_mask */ 669 0xffff, /* dst_mask */ 670 FALSE), /* pcrel_offset */ 671 672 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with 673 small data items. */ 674 HOWTO (R_PPC_SDAREL16, /* type */ 675 0, /* rightshift */ 676 1, /* size (0 = byte, 1 = short, 2 = long) */ 677 16, /* bitsize */ 678 FALSE, /* pc_relative */ 679 0, /* bitpos */ 680 complain_overflow_signed, /* complain_on_overflow */ 681 bfd_elf_generic_reloc, /* special_function */ 682 "R_PPC_SDAREL16", /* name */ 683 FALSE, /* partial_inplace */ 684 0, /* src_mask */ 685 0xffff, /* dst_mask */ 686 FALSE), /* pcrel_offset */ 687 688 /* 16-bit section relative relocation. */ 689 HOWTO (R_PPC_SECTOFF, /* type */ 690 0, /* rightshift */ 691 1, /* size (0 = byte, 1 = short, 2 = long) */ 692 16, /* bitsize */ 693 FALSE, /* pc_relative */ 694 0, /* bitpos */ 695 complain_overflow_bitfield, /* complain_on_overflow */ 696 bfd_elf_generic_reloc, /* special_function */ 697 "R_PPC_SECTOFF", /* name */ 698 FALSE, /* partial_inplace */ 699 0, /* src_mask */ 700 0xffff, /* dst_mask */ 701 FALSE), /* pcrel_offset */ 702 703 /* 16-bit lower half section relative relocation. */ 704 HOWTO (R_PPC_SECTOFF_LO, /* type */ 705 0, /* rightshift */ 706 1, /* size (0 = byte, 1 = short, 2 = long) */ 707 16, /* bitsize */ 708 FALSE, /* pc_relative */ 709 0, /* bitpos */ 710 complain_overflow_dont, /* complain_on_overflow */ 711 bfd_elf_generic_reloc, /* special_function */ 712 "R_PPC_SECTOFF_LO", /* name */ 713 FALSE, /* partial_inplace */ 714 0, /* src_mask */ 715 0xffff, /* dst_mask */ 716 FALSE), /* pcrel_offset */ 717 718 /* 16-bit upper half section relative relocation. */ 719 HOWTO (R_PPC_SECTOFF_HI, /* type */ 720 16, /* rightshift */ 721 1, /* size (0 = byte, 1 = short, 2 = long) */ 722 16, /* bitsize */ 723 FALSE, /* pc_relative */ 724 0, /* bitpos */ 725 complain_overflow_bitfield, /* complain_on_overflow */ 726 bfd_elf_generic_reloc, /* special_function */ 727 "R_PPC_SECTOFF_HI", /* name */ 728 FALSE, /* partial_inplace */ 729 0, /* src_mask */ 730 0xffff, /* dst_mask */ 731 FALSE), /* pcrel_offset */ 732 733 /* 16-bit upper half adjusted section relative relocation. */ 734 HOWTO (R_PPC_SECTOFF_HA, /* type */ 735 16, /* rightshift */ 736 1, /* size (0 = byte, 1 = short, 2 = long) */ 737 16, /* bitsize */ 738 FALSE, /* pc_relative */ 739 0, /* bitpos */ 740 complain_overflow_bitfield, /* complain_on_overflow */ 741 ppc_elf_addr16_ha_reloc, /* special_function */ 742 "R_PPC_SECTOFF_HA", /* name */ 743 FALSE, /* partial_inplace */ 744 0, /* src_mask */ 745 0xffff, /* dst_mask */ 746 FALSE), /* pcrel_offset */ 747 748 /* Marker reloc for TLS. */ 749 HOWTO (R_PPC_TLS, 750 0, /* rightshift */ 751 2, /* size (0 = byte, 1 = short, 2 = long) */ 752 32, /* bitsize */ 753 FALSE, /* pc_relative */ 754 0, /* bitpos */ 755 complain_overflow_dont, /* complain_on_overflow */ 756 bfd_elf_generic_reloc, /* special_function */ 757 "R_PPC_TLS", /* name */ 758 FALSE, /* partial_inplace */ 759 0, /* src_mask */ 760 0, /* dst_mask */ 761 FALSE), /* pcrel_offset */ 762 763 /* Computes the load module index of the load module that contains the 764 definition of its TLS sym. */ 765 HOWTO (R_PPC_DTPMOD32, 766 0, /* rightshift */ 767 2, /* size (0 = byte, 1 = short, 2 = long) */ 768 32, /* bitsize */ 769 FALSE, /* pc_relative */ 770 0, /* bitpos */ 771 complain_overflow_dont, /* complain_on_overflow */ 772 ppc_elf_unhandled_reloc, /* special_function */ 773 "R_PPC_DTPMOD32", /* name */ 774 FALSE, /* partial_inplace */ 775 0, /* src_mask */ 776 0xffffffff, /* dst_mask */ 777 FALSE), /* pcrel_offset */ 778 779 /* Computes a dtv-relative displacement, the difference between the value 780 of sym+add and the base address of the thread-local storage block that 781 contains the definition of sym, minus 0x8000. */ 782 HOWTO (R_PPC_DTPREL32, 783 0, /* rightshift */ 784 2, /* size (0 = byte, 1 = short, 2 = long) */ 785 32, /* bitsize */ 786 FALSE, /* pc_relative */ 787 0, /* bitpos */ 788 complain_overflow_dont, /* complain_on_overflow */ 789 ppc_elf_unhandled_reloc, /* special_function */ 790 "R_PPC_DTPREL32", /* name */ 791 FALSE, /* partial_inplace */ 792 0, /* src_mask */ 793 0xffffffff, /* dst_mask */ 794 FALSE), /* pcrel_offset */ 795 796 /* A 16 bit dtprel reloc. */ 797 HOWTO (R_PPC_DTPREL16, 798 0, /* rightshift */ 799 1, /* size (0 = byte, 1 = short, 2 = long) */ 800 16, /* bitsize */ 801 FALSE, /* pc_relative */ 802 0, /* bitpos */ 803 complain_overflow_signed, /* complain_on_overflow */ 804 ppc_elf_unhandled_reloc, /* special_function */ 805 "R_PPC_DTPREL16", /* name */ 806 FALSE, /* partial_inplace */ 807 0, /* src_mask */ 808 0xffff, /* dst_mask */ 809 FALSE), /* pcrel_offset */ 810 811 /* Like DTPREL16, but no overflow. */ 812 HOWTO (R_PPC_DTPREL16_LO, 813 0, /* rightshift */ 814 1, /* size (0 = byte, 1 = short, 2 = long) */ 815 16, /* bitsize */ 816 FALSE, /* pc_relative */ 817 0, /* bitpos */ 818 complain_overflow_dont, /* complain_on_overflow */ 819 ppc_elf_unhandled_reloc, /* special_function */ 820 "R_PPC_DTPREL16_LO", /* name */ 821 FALSE, /* partial_inplace */ 822 0, /* src_mask */ 823 0xffff, /* dst_mask */ 824 FALSE), /* pcrel_offset */ 825 826 /* Like DTPREL16_LO, but next higher group of 16 bits. */ 827 HOWTO (R_PPC_DTPREL16_HI, 828 16, /* rightshift */ 829 1, /* size (0 = byte, 1 = short, 2 = long) */ 830 16, /* bitsize */ 831 FALSE, /* pc_relative */ 832 0, /* bitpos */ 833 complain_overflow_dont, /* complain_on_overflow */ 834 ppc_elf_unhandled_reloc, /* special_function */ 835 "R_PPC_DTPREL16_HI", /* name */ 836 FALSE, /* partial_inplace */ 837 0, /* src_mask */ 838 0xffff, /* dst_mask */ 839 FALSE), /* pcrel_offset */ 840 841 /* Like DTPREL16_HI, but adjust for low 16 bits. */ 842 HOWTO (R_PPC_DTPREL16_HA, 843 16, /* rightshift */ 844 1, /* size (0 = byte, 1 = short, 2 = long) */ 845 16, /* bitsize */ 846 FALSE, /* pc_relative */ 847 0, /* bitpos */ 848 complain_overflow_dont, /* complain_on_overflow */ 849 ppc_elf_unhandled_reloc, /* special_function */ 850 "R_PPC_DTPREL16_HA", /* name */ 851 FALSE, /* partial_inplace */ 852 0, /* src_mask */ 853 0xffff, /* dst_mask */ 854 FALSE), /* pcrel_offset */ 855 856 /* Computes a tp-relative displacement, the difference between the value of 857 sym+add and the value of the thread pointer (r13). */ 858 HOWTO (R_PPC_TPREL32, 859 0, /* rightshift */ 860 2, /* size (0 = byte, 1 = short, 2 = long) */ 861 32, /* bitsize */ 862 FALSE, /* pc_relative */ 863 0, /* bitpos */ 864 complain_overflow_dont, /* complain_on_overflow */ 865 ppc_elf_unhandled_reloc, /* special_function */ 866 "R_PPC_TPREL32", /* name */ 867 FALSE, /* partial_inplace */ 868 0, /* src_mask */ 869 0xffffffff, /* dst_mask */ 870 FALSE), /* pcrel_offset */ 871 872 /* A 16 bit tprel reloc. */ 873 HOWTO (R_PPC_TPREL16, 874 0, /* rightshift */ 875 1, /* size (0 = byte, 1 = short, 2 = long) */ 876 16, /* bitsize */ 877 FALSE, /* pc_relative */ 878 0, /* bitpos */ 879 complain_overflow_signed, /* complain_on_overflow */ 880 ppc_elf_unhandled_reloc, /* special_function */ 881 "R_PPC_TPREL16", /* name */ 882 FALSE, /* partial_inplace */ 883 0, /* src_mask */ 884 0xffff, /* dst_mask */ 885 FALSE), /* pcrel_offset */ 886 887 /* Like TPREL16, but no overflow. */ 888 HOWTO (R_PPC_TPREL16_LO, 889 0, /* rightshift */ 890 1, /* size (0 = byte, 1 = short, 2 = long) */ 891 16, /* bitsize */ 892 FALSE, /* pc_relative */ 893 0, /* bitpos */ 894 complain_overflow_dont, /* complain_on_overflow */ 895 ppc_elf_unhandled_reloc, /* special_function */ 896 "R_PPC_TPREL16_LO", /* name */ 897 FALSE, /* partial_inplace */ 898 0, /* src_mask */ 899 0xffff, /* dst_mask */ 900 FALSE), /* pcrel_offset */ 901 902 /* Like TPREL16_LO, but next higher group of 16 bits. */ 903 HOWTO (R_PPC_TPREL16_HI, 904 16, /* rightshift */ 905 1, /* size (0 = byte, 1 = short, 2 = long) */ 906 16, /* bitsize */ 907 FALSE, /* pc_relative */ 908 0, /* bitpos */ 909 complain_overflow_dont, /* complain_on_overflow */ 910 ppc_elf_unhandled_reloc, /* special_function */ 911 "R_PPC_TPREL16_HI", /* name */ 912 FALSE, /* partial_inplace */ 913 0, /* src_mask */ 914 0xffff, /* dst_mask */ 915 FALSE), /* pcrel_offset */ 916 917 /* Like TPREL16_HI, but adjust for low 16 bits. */ 918 HOWTO (R_PPC_TPREL16_HA, 919 16, /* rightshift */ 920 1, /* size (0 = byte, 1 = short, 2 = long) */ 921 16, /* bitsize */ 922 FALSE, /* pc_relative */ 923 0, /* bitpos */ 924 complain_overflow_dont, /* complain_on_overflow */ 925 ppc_elf_unhandled_reloc, /* special_function */ 926 "R_PPC_TPREL16_HA", /* name */ 927 FALSE, /* partial_inplace */ 928 0, /* src_mask */ 929 0xffff, /* dst_mask */ 930 FALSE), /* pcrel_offset */ 931 932 /* Allocates two contiguous entries in the GOT to hold a tls_index structure, 933 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset 934 to the first entry. */ 935 HOWTO (R_PPC_GOT_TLSGD16, 936 0, /* rightshift */ 937 1, /* size (0 = byte, 1 = short, 2 = long) */ 938 16, /* bitsize */ 939 FALSE, /* pc_relative */ 940 0, /* bitpos */ 941 complain_overflow_signed, /* complain_on_overflow */ 942 ppc_elf_unhandled_reloc, /* special_function */ 943 "R_PPC_GOT_TLSGD16", /* name */ 944 FALSE, /* partial_inplace */ 945 0, /* src_mask */ 946 0xffff, /* dst_mask */ 947 FALSE), /* pcrel_offset */ 948 949 /* Like GOT_TLSGD16, but no overflow. */ 950 HOWTO (R_PPC_GOT_TLSGD16_LO, 951 0, /* rightshift */ 952 1, /* size (0 = byte, 1 = short, 2 = long) */ 953 16, /* bitsize */ 954 FALSE, /* pc_relative */ 955 0, /* bitpos */ 956 complain_overflow_dont, /* complain_on_overflow */ 957 ppc_elf_unhandled_reloc, /* special_function */ 958 "R_PPC_GOT_TLSGD16_LO", /* name */ 959 FALSE, /* partial_inplace */ 960 0, /* src_mask */ 961 0xffff, /* dst_mask */ 962 FALSE), /* pcrel_offset */ 963 964 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */ 965 HOWTO (R_PPC_GOT_TLSGD16_HI, 966 16, /* rightshift */ 967 1, /* size (0 = byte, 1 = short, 2 = long) */ 968 16, /* bitsize */ 969 FALSE, /* pc_relative */ 970 0, /* bitpos */ 971 complain_overflow_dont, /* complain_on_overflow */ 972 ppc_elf_unhandled_reloc, /* special_function */ 973 "R_PPC_GOT_TLSGD16_HI", /* name */ 974 FALSE, /* partial_inplace */ 975 0, /* src_mask */ 976 0xffff, /* dst_mask */ 977 FALSE), /* pcrel_offset */ 978 979 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */ 980 HOWTO (R_PPC_GOT_TLSGD16_HA, 981 16, /* rightshift */ 982 1, /* size (0 = byte, 1 = short, 2 = long) */ 983 16, /* bitsize */ 984 FALSE, /* pc_relative */ 985 0, /* bitpos */ 986 complain_overflow_dont, /* complain_on_overflow */ 987 ppc_elf_unhandled_reloc, /* special_function */ 988 "R_PPC_GOT_TLSGD16_HA", /* name */ 989 FALSE, /* partial_inplace */ 990 0, /* src_mask */ 991 0xffff, /* dst_mask */ 992 FALSE), /* pcrel_offset */ 993 994 /* Allocates two contiguous entries in the GOT to hold a tls_index structure, 995 with values (sym+add)@dtpmod and zero, and computes the offset to the 996 first entry. */ 997 HOWTO (R_PPC_GOT_TLSLD16, 998 0, /* rightshift */ 999 1, /* size (0 = byte, 1 = short, 2 = long) */ 1000 16, /* bitsize */ 1001 FALSE, /* pc_relative */ 1002 0, /* bitpos */ 1003 complain_overflow_signed, /* complain_on_overflow */ 1004 ppc_elf_unhandled_reloc, /* special_function */ 1005 "R_PPC_GOT_TLSLD16", /* name */ 1006 FALSE, /* partial_inplace */ 1007 0, /* src_mask */ 1008 0xffff, /* dst_mask */ 1009 FALSE), /* pcrel_offset */ 1010 1011 /* Like GOT_TLSLD16, but no overflow. */ 1012 HOWTO (R_PPC_GOT_TLSLD16_LO, 1013 0, /* rightshift */ 1014 1, /* size (0 = byte, 1 = short, 2 = long) */ 1015 16, /* bitsize */ 1016 FALSE, /* pc_relative */ 1017 0, /* bitpos */ 1018 complain_overflow_dont, /* complain_on_overflow */ 1019 ppc_elf_unhandled_reloc, /* special_function */ 1020 "R_PPC_GOT_TLSLD16_LO", /* name */ 1021 FALSE, /* partial_inplace */ 1022 0, /* src_mask */ 1023 0xffff, /* dst_mask */ 1024 FALSE), /* pcrel_offset */ 1025 1026 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */ 1027 HOWTO (R_PPC_GOT_TLSLD16_HI, 1028 16, /* rightshift */ 1029 1, /* size (0 = byte, 1 = short, 2 = long) */ 1030 16, /* bitsize */ 1031 FALSE, /* pc_relative */ 1032 0, /* bitpos */ 1033 complain_overflow_dont, /* complain_on_overflow */ 1034 ppc_elf_unhandled_reloc, /* special_function */ 1035 "R_PPC_GOT_TLSLD16_HI", /* name */ 1036 FALSE, /* partial_inplace */ 1037 0, /* src_mask */ 1038 0xffff, /* dst_mask */ 1039 FALSE), /* pcrel_offset */ 1040 1041 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */ 1042 HOWTO (R_PPC_GOT_TLSLD16_HA, 1043 16, /* rightshift */ 1044 1, /* size (0 = byte, 1 = short, 2 = long) */ 1045 16, /* bitsize */ 1046 FALSE, /* pc_relative */ 1047 0, /* bitpos */ 1048 complain_overflow_dont, /* complain_on_overflow */ 1049 ppc_elf_unhandled_reloc, /* special_function */ 1050 "R_PPC_GOT_TLSLD16_HA", /* name */ 1051 FALSE, /* partial_inplace */ 1052 0, /* src_mask */ 1053 0xffff, /* dst_mask */ 1054 FALSE), /* pcrel_offset */ 1055 1056 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes 1057 the offset to the entry. */ 1058 HOWTO (R_PPC_GOT_DTPREL16, 1059 0, /* rightshift */ 1060 1, /* size (0 = byte, 1 = short, 2 = long) */ 1061 16, /* bitsize */ 1062 FALSE, /* pc_relative */ 1063 0, /* bitpos */ 1064 complain_overflow_signed, /* complain_on_overflow */ 1065 ppc_elf_unhandled_reloc, /* special_function */ 1066 "R_PPC_GOT_DTPREL16", /* name */ 1067 FALSE, /* partial_inplace */ 1068 0, /* src_mask */ 1069 0xffff, /* dst_mask */ 1070 FALSE), /* pcrel_offset */ 1071 1072 /* Like GOT_DTPREL16, but no overflow. */ 1073 HOWTO (R_PPC_GOT_DTPREL16_LO, 1074 0, /* rightshift */ 1075 1, /* size (0 = byte, 1 = short, 2 = long) */ 1076 16, /* bitsize */ 1077 FALSE, /* pc_relative */ 1078 0, /* bitpos */ 1079 complain_overflow_dont, /* complain_on_overflow */ 1080 ppc_elf_unhandled_reloc, /* special_function */ 1081 "R_PPC_GOT_DTPREL16_LO", /* name */ 1082 FALSE, /* partial_inplace */ 1083 0, /* src_mask */ 1084 0xffff, /* dst_mask */ 1085 FALSE), /* pcrel_offset */ 1086 1087 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */ 1088 HOWTO (R_PPC_GOT_DTPREL16_HI, 1089 16, /* rightshift */ 1090 1, /* size (0 = byte, 1 = short, 2 = long) */ 1091 16, /* bitsize */ 1092 FALSE, /* pc_relative */ 1093 0, /* bitpos */ 1094 complain_overflow_dont, /* complain_on_overflow */ 1095 ppc_elf_unhandled_reloc, /* special_function */ 1096 "R_PPC_GOT_DTPREL16_HI", /* name */ 1097 FALSE, /* partial_inplace */ 1098 0, /* src_mask */ 1099 0xffff, /* dst_mask */ 1100 FALSE), /* pcrel_offset */ 1101 1102 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */ 1103 HOWTO (R_PPC_GOT_DTPREL16_HA, 1104 16, /* rightshift */ 1105 1, /* size (0 = byte, 1 = short, 2 = long) */ 1106 16, /* bitsize */ 1107 FALSE, /* pc_relative */ 1108 0, /* bitpos */ 1109 complain_overflow_dont, /* complain_on_overflow */ 1110 ppc_elf_unhandled_reloc, /* special_function */ 1111 "R_PPC_GOT_DTPREL16_HA", /* name */ 1112 FALSE, /* partial_inplace */ 1113 0, /* src_mask */ 1114 0xffff, /* dst_mask */ 1115 FALSE), /* pcrel_offset */ 1116 1117 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the 1118 offset to the entry. */ 1119 HOWTO (R_PPC_GOT_TPREL16, 1120 0, /* rightshift */ 1121 1, /* size (0 = byte, 1 = short, 2 = long) */ 1122 16, /* bitsize */ 1123 FALSE, /* pc_relative */ 1124 0, /* bitpos */ 1125 complain_overflow_signed, /* complain_on_overflow */ 1126 ppc_elf_unhandled_reloc, /* special_function */ 1127 "R_PPC_GOT_TPREL16", /* name */ 1128 FALSE, /* partial_inplace */ 1129 0, /* src_mask */ 1130 0xffff, /* dst_mask */ 1131 FALSE), /* pcrel_offset */ 1132 1133 /* Like GOT_TPREL16, but no overflow. */ 1134 HOWTO (R_PPC_GOT_TPREL16_LO, 1135 0, /* rightshift */ 1136 1, /* size (0 = byte, 1 = short, 2 = long) */ 1137 16, /* bitsize */ 1138 FALSE, /* pc_relative */ 1139 0, /* bitpos */ 1140 complain_overflow_dont, /* complain_on_overflow */ 1141 ppc_elf_unhandled_reloc, /* special_function */ 1142 "R_PPC_GOT_TPREL16_LO", /* name */ 1143 FALSE, /* partial_inplace */ 1144 0, /* src_mask */ 1145 0xffff, /* dst_mask */ 1146 FALSE), /* pcrel_offset */ 1147 1148 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */ 1149 HOWTO (R_PPC_GOT_TPREL16_HI, 1150 16, /* rightshift */ 1151 1, /* size (0 = byte, 1 = short, 2 = long) */ 1152 16, /* bitsize */ 1153 FALSE, /* pc_relative */ 1154 0, /* bitpos */ 1155 complain_overflow_dont, /* complain_on_overflow */ 1156 ppc_elf_unhandled_reloc, /* special_function */ 1157 "R_PPC_GOT_TPREL16_HI", /* name */ 1158 FALSE, /* partial_inplace */ 1159 0, /* src_mask */ 1160 0xffff, /* dst_mask */ 1161 FALSE), /* pcrel_offset */ 1162 1163 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */ 1164 HOWTO (R_PPC_GOT_TPREL16_HA, 1165 16, /* rightshift */ 1166 1, /* size (0 = byte, 1 = short, 2 = long) */ 1167 16, /* bitsize */ 1168 FALSE, /* pc_relative */ 1169 0, /* bitpos */ 1170 complain_overflow_dont, /* complain_on_overflow */ 1171 ppc_elf_unhandled_reloc, /* special_function */ 1172 "R_PPC_GOT_TPREL16_HA", /* name */ 1173 FALSE, /* partial_inplace */ 1174 0, /* src_mask */ 1175 0xffff, /* dst_mask */ 1176 FALSE), /* pcrel_offset */ 1177 1178 /* The remaining relocs are from the Embedded ELF ABI, and are not 1179 in the SVR4 ELF ABI. */ 1180 1181 /* 32 bit value resulting from the addend minus the symbol. */ 1182 HOWTO (R_PPC_EMB_NADDR32, /* type */ 1183 0, /* rightshift */ 1184 2, /* size (0 = byte, 1 = short, 2 = long) */ 1185 32, /* bitsize */ 1186 FALSE, /* pc_relative */ 1187 0, /* bitpos */ 1188 complain_overflow_bitfield, /* complain_on_overflow */ 1189 bfd_elf_generic_reloc, /* special_function */ 1190 "R_PPC_EMB_NADDR32", /* name */ 1191 FALSE, /* partial_inplace */ 1192 0, /* src_mask */ 1193 0xffffffff, /* dst_mask */ 1194 FALSE), /* pcrel_offset */ 1195 1196 /* 16 bit value resulting from the addend minus the symbol. */ 1197 HOWTO (R_PPC_EMB_NADDR16, /* type */ 1198 0, /* rightshift */ 1199 1, /* size (0 = byte, 1 = short, 2 = long) */ 1200 16, /* bitsize */ 1201 FALSE, /* pc_relative */ 1202 0, /* bitpos */ 1203 complain_overflow_bitfield, /* complain_on_overflow */ 1204 bfd_elf_generic_reloc, /* special_function */ 1205 "R_PPC_EMB_NADDR16", /* name */ 1206 FALSE, /* partial_inplace */ 1207 0, /* src_mask */ 1208 0xffff, /* dst_mask */ 1209 FALSE), /* pcrel_offset */ 1210 1211 /* 16 bit value resulting from the addend minus the symbol. */ 1212 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */ 1213 0, /* rightshift */ 1214 1, /* size (0 = byte, 1 = short, 2 = long) */ 1215 16, /* bitsize */ 1216 FALSE, /* pc_relative */ 1217 0, /* bitpos */ 1218 complain_overflow_dont,/* complain_on_overflow */ 1219 bfd_elf_generic_reloc, /* special_function */ 1220 "R_PPC_EMB_ADDR16_LO", /* name */ 1221 FALSE, /* partial_inplace */ 1222 0, /* src_mask */ 1223 0xffff, /* dst_mask */ 1224 FALSE), /* pcrel_offset */ 1225 1226 /* The high order 16 bits of the addend minus the symbol. */ 1227 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */ 1228 16, /* rightshift */ 1229 1, /* size (0 = byte, 1 = short, 2 = long) */ 1230 16, /* bitsize */ 1231 FALSE, /* pc_relative */ 1232 0, /* bitpos */ 1233 complain_overflow_dont, /* complain_on_overflow */ 1234 bfd_elf_generic_reloc, /* special_function */ 1235 "R_PPC_EMB_NADDR16_HI", /* name */ 1236 FALSE, /* partial_inplace */ 1237 0, /* src_mask */ 1238 0xffff, /* dst_mask */ 1239 FALSE), /* pcrel_offset */ 1240 1241 /* The high order 16 bits of the result of the addend minus the address, 1242 plus 1 if the contents of the low 16 bits, treated as a signed number, 1243 is negative. */ 1244 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */ 1245 16, /* rightshift */ 1246 1, /* size (0 = byte, 1 = short, 2 = long) */ 1247 16, /* bitsize */ 1248 FALSE, /* pc_relative */ 1249 0, /* bitpos */ 1250 complain_overflow_dont, /* complain_on_overflow */ 1251 ppc_elf_addr16_ha_reloc, /* special_function */ 1252 "R_PPC_EMB_NADDR16_HA", /* name */ 1253 FALSE, /* partial_inplace */ 1254 0, /* src_mask */ 1255 0xffff, /* dst_mask */ 1256 FALSE), /* pcrel_offset */ 1257 1258 /* 16 bit value resulting from allocating a 4 byte word to hold an 1259 address in the .sdata section, and returning the offset from 1260 _SDA_BASE_ for that relocation. */ 1261 HOWTO (R_PPC_EMB_SDAI16, /* type */ 1262 0, /* rightshift */ 1263 1, /* size (0 = byte, 1 = short, 2 = long) */ 1264 16, /* bitsize */ 1265 FALSE, /* pc_relative */ 1266 0, /* bitpos */ 1267 complain_overflow_bitfield, /* complain_on_overflow */ 1268 bfd_elf_generic_reloc, /* special_function */ 1269 "R_PPC_EMB_SDAI16", /* name */ 1270 FALSE, /* partial_inplace */ 1271 0, /* src_mask */ 1272 0xffff, /* dst_mask */ 1273 FALSE), /* pcrel_offset */ 1274 1275 /* 16 bit value resulting from allocating a 4 byte word to hold an 1276 address in the .sdata2 section, and returning the offset from 1277 _SDA2_BASE_ for that relocation. */ 1278 HOWTO (R_PPC_EMB_SDA2I16, /* type */ 1279 0, /* rightshift */ 1280 1, /* size (0 = byte, 1 = short, 2 = long) */ 1281 16, /* bitsize */ 1282 FALSE, /* pc_relative */ 1283 0, /* bitpos */ 1284 complain_overflow_bitfield, /* complain_on_overflow */ 1285 bfd_elf_generic_reloc, /* special_function */ 1286 "R_PPC_EMB_SDA2I16", /* name */ 1287 FALSE, /* partial_inplace */ 1288 0, /* src_mask */ 1289 0xffff, /* dst_mask */ 1290 FALSE), /* pcrel_offset */ 1291 1292 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with 1293 small data items. */ 1294 HOWTO (R_PPC_EMB_SDA2REL, /* type */ 1295 0, /* rightshift */ 1296 1, /* size (0 = byte, 1 = short, 2 = long) */ 1297 16, /* bitsize */ 1298 FALSE, /* pc_relative */ 1299 0, /* bitpos */ 1300 complain_overflow_signed, /* complain_on_overflow */ 1301 bfd_elf_generic_reloc, /* special_function */ 1302 "R_PPC_EMB_SDA2REL", /* name */ 1303 FALSE, /* partial_inplace */ 1304 0, /* src_mask */ 1305 0xffff, /* dst_mask */ 1306 FALSE), /* pcrel_offset */ 1307 1308 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit 1309 signed offset from the appropriate base, and filling in the register 1310 field with the appropriate register (0, 2, or 13). */ 1311 HOWTO (R_PPC_EMB_SDA21, /* type */ 1312 0, /* rightshift */ 1313 2, /* size (0 = byte, 1 = short, 2 = long) */ 1314 16, /* bitsize */ 1315 FALSE, /* pc_relative */ 1316 0, /* bitpos */ 1317 complain_overflow_signed, /* complain_on_overflow */ 1318 bfd_elf_generic_reloc, /* special_function */ 1319 "R_PPC_EMB_SDA21", /* name */ 1320 FALSE, /* partial_inplace */ 1321 0, /* src_mask */ 1322 0xffff, /* dst_mask */ 1323 FALSE), /* pcrel_offset */ 1324 1325 /* Relocation not handled: R_PPC_EMB_MRKREF */ 1326 /* Relocation not handled: R_PPC_EMB_RELSEC16 */ 1327 /* Relocation not handled: R_PPC_EMB_RELST_LO */ 1328 /* Relocation not handled: R_PPC_EMB_RELST_HI */ 1329 /* Relocation not handled: R_PPC_EMB_RELST_HA */ 1330 /* Relocation not handled: R_PPC_EMB_BIT_FLD */ 1331 1332 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling 1333 in the 16 bit signed offset from the appropriate base, and filling in the 1334 register field with the appropriate register (0, 2, or 13). */ 1335 HOWTO (R_PPC_EMB_RELSDA, /* type */ 1336 0, /* rightshift */ 1337 1, /* size (0 = byte, 1 = short, 2 = long) */ 1338 16, /* bitsize */ 1339 TRUE, /* pc_relative */ 1340 0, /* bitpos */ 1341 complain_overflow_signed, /* complain_on_overflow */ 1342 bfd_elf_generic_reloc, /* special_function */ 1343 "R_PPC_EMB_RELSDA", /* name */ 1344 FALSE, /* partial_inplace */ 1345 0, /* src_mask */ 1346 0xffff, /* dst_mask */ 1347 FALSE), /* pcrel_offset */ 1348 1349 /* A 16 bit relative relocation. */ 1350 HOWTO (R_PPC_REL16, /* type */ 1351 0, /* rightshift */ 1352 1, /* size (0 = byte, 1 = short, 2 = long) */ 1353 16, /* bitsize */ 1354 TRUE, /* pc_relative */ 1355 0, /* bitpos */ 1356 complain_overflow_bitfield, /* complain_on_overflow */ 1357 bfd_elf_generic_reloc, /* special_function */ 1358 "R_PPC_REL16", /* name */ 1359 FALSE, /* partial_inplace */ 1360 0, /* src_mask */ 1361 0xffff, /* dst_mask */ 1362 TRUE), /* pcrel_offset */ 1363 1364 /* A 16 bit relative relocation without overflow. */ 1365 HOWTO (R_PPC_REL16_LO, /* type */ 1366 0, /* rightshift */ 1367 1, /* size (0 = byte, 1 = short, 2 = long) */ 1368 16, /* bitsize */ 1369 TRUE, /* pc_relative */ 1370 0, /* bitpos */ 1371 complain_overflow_dont,/* complain_on_overflow */ 1372 bfd_elf_generic_reloc, /* special_function */ 1373 "R_PPC_REL16_LO", /* name */ 1374 FALSE, /* partial_inplace */ 1375 0, /* src_mask */ 1376 0xffff, /* dst_mask */ 1377 TRUE), /* pcrel_offset */ 1378 1379 /* The high order 16 bits of a relative address. */ 1380 HOWTO (R_PPC_REL16_HI, /* type */ 1381 16, /* rightshift */ 1382 1, /* size (0 = byte, 1 = short, 2 = long) */ 1383 16, /* bitsize */ 1384 TRUE, /* pc_relative */ 1385 0, /* bitpos */ 1386 complain_overflow_dont, /* complain_on_overflow */ 1387 bfd_elf_generic_reloc, /* special_function */ 1388 "R_PPC_REL16_HI", /* name */ 1389 FALSE, /* partial_inplace */ 1390 0, /* src_mask */ 1391 0xffff, /* dst_mask */ 1392 TRUE), /* pcrel_offset */ 1393 1394 /* The high order 16 bits of a relative address, plus 1 if the contents of 1395 the low 16 bits, treated as a signed number, is negative. */ 1396 HOWTO (R_PPC_REL16_HA, /* type */ 1397 16, /* rightshift */ 1398 1, /* size (0 = byte, 1 = short, 2 = long) */ 1399 16, /* bitsize */ 1400 TRUE, /* pc_relative */ 1401 0, /* bitpos */ 1402 complain_overflow_dont, /* complain_on_overflow */ 1403 ppc_elf_addr16_ha_reloc, /* special_function */ 1404 "R_PPC_REL16_HA", /* name */ 1405 FALSE, /* partial_inplace */ 1406 0, /* src_mask */ 1407 0xffff, /* dst_mask */ 1408 TRUE), /* pcrel_offset */ 1409 1410 /* GNU extension to record C++ vtable hierarchy. */ 1411 HOWTO (R_PPC_GNU_VTINHERIT, /* type */ 1412 0, /* rightshift */ 1413 0, /* size (0 = byte, 1 = short, 2 = long) */ 1414 0, /* bitsize */ 1415 FALSE, /* pc_relative */ 1416 0, /* bitpos */ 1417 complain_overflow_dont, /* complain_on_overflow */ 1418 NULL, /* special_function */ 1419 "R_PPC_GNU_VTINHERIT", /* name */ 1420 FALSE, /* partial_inplace */ 1421 0, /* src_mask */ 1422 0, /* dst_mask */ 1423 FALSE), /* pcrel_offset */ 1424 1425 /* GNU extension to record C++ vtable member usage. */ 1426 HOWTO (R_PPC_GNU_VTENTRY, /* type */ 1427 0, /* rightshift */ 1428 0, /* size (0 = byte, 1 = short, 2 = long) */ 1429 0, /* bitsize */ 1430 FALSE, /* pc_relative */ 1431 0, /* bitpos */ 1432 complain_overflow_dont, /* complain_on_overflow */ 1433 NULL, /* special_function */ 1434 "R_PPC_GNU_VTENTRY", /* name */ 1435 FALSE, /* partial_inplace */ 1436 0, /* src_mask */ 1437 0, /* dst_mask */ 1438 FALSE), /* pcrel_offset */ 1439 1440 /* Phony reloc to handle AIX style TOC entries. */ 1441 HOWTO (R_PPC_TOC16, /* type */ 1442 0, /* rightshift */ 1443 1, /* size (0 = byte, 1 = short, 2 = long) */ 1444 16, /* bitsize */ 1445 FALSE, /* pc_relative */ 1446 0, /* bitpos */ 1447 complain_overflow_signed, /* complain_on_overflow */ 1448 bfd_elf_generic_reloc, /* special_function */ 1449 "R_PPC_TOC16", /* name */ 1450 FALSE, /* partial_inplace */ 1451 0, /* src_mask */ 1452 0xffff, /* dst_mask */ 1453 FALSE), /* pcrel_offset */ 1454 }; 1455 1456 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */ 1457 1458 static void 1459 ppc_elf_howto_init (void) 1460 { 1461 unsigned int i, type; 1462 1463 for (i = 0; 1464 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]); 1465 i++) 1466 { 1467 type = ppc_elf_howto_raw[i].type; 1468 if (type >= (sizeof (ppc_elf_howto_table) 1469 / sizeof (ppc_elf_howto_table[0]))) 1470 abort (); 1471 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i]; 1472 } 1473 } 1474 1475 static reloc_howto_type * 1476 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 1477 bfd_reloc_code_real_type code) 1478 { 1479 enum elf_ppc_reloc_type r; 1480 1481 /* Initialize howto table if not already done. */ 1482 if (!ppc_elf_howto_table[R_PPC_ADDR32]) 1483 ppc_elf_howto_init (); 1484 1485 switch (code) 1486 { 1487 default: 1488 return NULL; 1489 1490 case BFD_RELOC_NONE: r = R_PPC_NONE; break; 1491 case BFD_RELOC_32: r = R_PPC_ADDR32; break; 1492 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break; 1493 case BFD_RELOC_16: r = R_PPC_ADDR16; break; 1494 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break; 1495 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break; 1496 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break; 1497 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break; 1498 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break; 1499 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break; 1500 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break; 1501 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break; 1502 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break; 1503 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break; 1504 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break; 1505 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break; 1506 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break; 1507 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break; 1508 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break; 1509 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break; 1510 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break; 1511 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break; 1512 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break; 1513 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break; 1514 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break; 1515 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break; 1516 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break; 1517 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break; 1518 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break; 1519 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break; 1520 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break; 1521 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break; 1522 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break; 1523 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break; 1524 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break; 1525 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break; 1526 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break; 1527 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break; 1528 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break; 1529 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break; 1530 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break; 1531 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break; 1532 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break; 1533 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break; 1534 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break; 1535 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break; 1536 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break; 1537 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break; 1538 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break; 1539 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break; 1540 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break; 1541 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break; 1542 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break; 1543 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break; 1544 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break; 1545 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break; 1546 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break; 1547 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break; 1548 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break; 1549 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break; 1550 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break; 1551 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break; 1552 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break; 1553 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break; 1554 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break; 1555 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break; 1556 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break; 1557 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break; 1558 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break; 1559 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break; 1560 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break; 1561 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break; 1562 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break; 1563 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break; 1564 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break; 1565 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break; 1566 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break; 1567 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break; 1568 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break; 1569 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break; 1570 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break; 1571 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break; 1572 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break; 1573 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break; 1574 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break; 1575 } 1576 1577 return ppc_elf_howto_table[r]; 1578 }; 1579 1580 /* Set the howto pointer for a PowerPC ELF reloc. */ 1581 1582 static void 1583 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, 1584 arelent *cache_ptr, 1585 Elf_Internal_Rela *dst) 1586 { 1587 /* Initialize howto table if not already done. */ 1588 if (!ppc_elf_howto_table[R_PPC_ADDR32]) 1589 ppc_elf_howto_init (); 1590 1591 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max); 1592 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)]; 1593 } 1594 1595 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */ 1596 1597 static bfd_reloc_status_type 1598 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED, 1599 arelent *reloc_entry, 1600 asymbol *symbol, 1601 void *data ATTRIBUTE_UNUSED, 1602 asection *input_section, 1603 bfd *output_bfd, 1604 char **error_message ATTRIBUTE_UNUSED) 1605 { 1606 bfd_vma relocation; 1607 1608 if (output_bfd != NULL) 1609 { 1610 reloc_entry->address += input_section->output_offset; 1611 return bfd_reloc_ok; 1612 } 1613 1614 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) 1615 return bfd_reloc_outofrange; 1616 1617 if (bfd_is_com_section (symbol->section)) 1618 relocation = 0; 1619 else 1620 relocation = symbol->value; 1621 1622 relocation += symbol->section->output_section->vma; 1623 relocation += symbol->section->output_offset; 1624 relocation += reloc_entry->addend; 1625 if (reloc_entry->howto->pc_relative) 1626 relocation -= reloc_entry->address; 1627 1628 reloc_entry->addend += (relocation & 0x8000) << 1; 1629 1630 return bfd_reloc_continue; 1631 } 1632 1633 static bfd_reloc_status_type 1634 ppc_elf_unhandled_reloc (bfd *abfd, 1635 arelent *reloc_entry, 1636 asymbol *symbol, 1637 void *data, 1638 asection *input_section, 1639 bfd *output_bfd, 1640 char **error_message) 1641 { 1642 /* If this is a relocatable link (output_bfd test tells us), just 1643 call the generic function. Any adjustment will be done at final 1644 link time. */ 1645 if (output_bfd != NULL) 1646 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, 1647 input_section, output_bfd, error_message); 1648 1649 if (error_message != NULL) 1650 { 1651 static char buf[60]; 1652 sprintf (buf, _("generic linker can't handle %s"), 1653 reloc_entry->howto->name); 1654 *error_message = buf; 1655 } 1656 return bfd_reloc_dangerous; 1657 } 1658 1659 /* Sections created by the linker. */ 1660 1661 typedef struct elf_linker_section 1662 { 1663 /* Pointer to the bfd section. */ 1664 asection *section; 1665 /* Section name. */ 1666 const char *name; 1667 /* Associated bss section name. */ 1668 const char *bss_name; 1669 /* Associated symbol name. */ 1670 const char *sym_name; 1671 /* Associated symbol. */ 1672 struct elf_link_hash_entry *sym; 1673 } elf_linker_section_t; 1674 1675 /* Linked list of allocated pointer entries. This hangs off of the 1676 symbol lists, and provides allows us to return different pointers, 1677 based on different addend's. */ 1678 1679 typedef struct elf_linker_section_pointers 1680 { 1681 /* next allocated pointer for this symbol */ 1682 struct elf_linker_section_pointers *next; 1683 /* offset of pointer from beginning of section */ 1684 bfd_vma offset; 1685 /* addend used */ 1686 bfd_vma addend; 1687 /* which linker section this is */ 1688 elf_linker_section_t *lsect; 1689 } elf_linker_section_pointers_t; 1690 1691 struct ppc_elf_obj_tdata 1692 { 1693 struct elf_obj_tdata elf; 1694 1695 /* A mapping from local symbols to offsets into the various linker 1696 sections added. This is index by the symbol index. */ 1697 elf_linker_section_pointers_t **linker_section_pointers; 1698 }; 1699 1700 #define ppc_elf_tdata(bfd) \ 1701 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any) 1702 1703 #define elf_local_ptr_offsets(bfd) \ 1704 (ppc_elf_tdata (bfd)->linker_section_pointers) 1705 1706 /* Override the generic function because we store some extras. */ 1707 1708 static bfd_boolean 1709 ppc_elf_mkobject (bfd *abfd) 1710 { 1711 bfd_size_type amt = sizeof (struct ppc_elf_obj_tdata); 1712 abfd->tdata.any = bfd_zalloc (abfd, amt); 1713 if (abfd->tdata.any == NULL) 1714 return FALSE; 1715 return TRUE; 1716 } 1717 1718 /* Fix bad default arch selected for a 32 bit input bfd when the 1719 default is 64 bit. */ 1720 1721 static bfd_boolean 1722 ppc_elf_object_p (bfd *abfd) 1723 { 1724 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64) 1725 { 1726 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd); 1727 1728 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32) 1729 { 1730 /* Relies on arch after 64 bit default being 32 bit default. */ 1731 abfd->arch_info = abfd->arch_info->next; 1732 BFD_ASSERT (abfd->arch_info->bits_per_word == 32); 1733 } 1734 } 1735 return TRUE; 1736 } 1737 1738 /* Function to set whether a module needs the -mrelocatable bit set. */ 1739 1740 static bfd_boolean 1741 ppc_elf_set_private_flags (bfd *abfd, flagword flags) 1742 { 1743 BFD_ASSERT (!elf_flags_init (abfd) 1744 || elf_elfheader (abfd)->e_flags == flags); 1745 1746 elf_elfheader (abfd)->e_flags = flags; 1747 elf_flags_init (abfd) = TRUE; 1748 return TRUE; 1749 } 1750 1751 /* Support for core dump NOTE sections. */ 1752 1753 static bfd_boolean 1754 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) 1755 { 1756 int offset; 1757 unsigned int size; 1758 1759 switch (note->descsz) 1760 { 1761 default: 1762 return FALSE; 1763 1764 case 268: /* Linux/PPC. */ 1765 /* pr_cursig */ 1766 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); 1767 1768 /* pr_pid */ 1769 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24); 1770 1771 /* pr_reg */ 1772 offset = 72; 1773 size = 192; 1774 1775 break; 1776 } 1777 1778 /* Make a ".reg/999" section. */ 1779 return _bfd_elfcore_make_pseudosection (abfd, ".reg", 1780 size, note->descpos + offset); 1781 } 1782 1783 static bfd_boolean 1784 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) 1785 { 1786 switch (note->descsz) 1787 { 1788 default: 1789 return FALSE; 1790 1791 case 128: /* Linux/PPC elf_prpsinfo. */ 1792 elf_tdata (abfd)->core_program 1793 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16); 1794 elf_tdata (abfd)->core_command 1795 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80); 1796 } 1797 1798 /* Note that for some reason, a spurious space is tacked 1799 onto the end of the args in some (at least one anyway) 1800 implementations, so strip it off if it exists. */ 1801 1802 { 1803 char *command = elf_tdata (abfd)->core_command; 1804 int n = strlen (command); 1805 1806 if (0 < n && command[n - 1] == ' ') 1807 command[n - 1] = '\0'; 1808 } 1809 1810 return TRUE; 1811 } 1812 1813 /* Return address for Ith PLT stub in section PLT, for relocation REL 1814 or (bfd_vma) -1 if it should not be included. */ 1815 1816 static bfd_vma 1817 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED, 1818 const asection *plt ATTRIBUTE_UNUSED, 1819 const arelent *rel) 1820 { 1821 return rel->address; 1822 } 1823 1824 /* Handle a PowerPC specific section when reading an object file. This 1825 is called when bfd_section_from_shdr finds a section with an unknown 1826 type. */ 1827 1828 static bfd_boolean 1829 ppc_elf_section_from_shdr (bfd *abfd, 1830 Elf_Internal_Shdr *hdr, 1831 const char *name, 1832 int shindex) 1833 { 1834 asection *newsect; 1835 flagword flags; 1836 1837 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) 1838 return FALSE; 1839 1840 newsect = hdr->bfd_section; 1841 flags = bfd_get_section_flags (abfd, newsect); 1842 if (hdr->sh_flags & SHF_EXCLUDE) 1843 flags |= SEC_EXCLUDE; 1844 1845 if (hdr->sh_type == SHT_ORDERED) 1846 flags |= SEC_SORT_ENTRIES; 1847 1848 bfd_set_section_flags (abfd, newsect, flags); 1849 return TRUE; 1850 } 1851 1852 /* Set up any other section flags and such that may be necessary. */ 1853 1854 static bfd_boolean 1855 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, 1856 Elf_Internal_Shdr *shdr, 1857 asection *asect) 1858 { 1859 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE) 1860 shdr->sh_flags |= SHF_EXCLUDE; 1861 1862 if ((asect->flags & SEC_SORT_ENTRIES) != 0) 1863 shdr->sh_type = SHT_ORDERED; 1864 1865 return TRUE; 1866 } 1867 1868 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we 1869 need to bump up the number of section headers. */ 1870 1871 static int 1872 ppc_elf_additional_program_headers (bfd *abfd) 1873 { 1874 asection *s; 1875 int ret = 0; 1876 1877 s = bfd_get_section_by_name (abfd, ".sbss2"); 1878 if (s != NULL && (s->flags & SEC_ALLOC) != 0) 1879 ++ret; 1880 1881 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0"); 1882 if (s != NULL && (s->flags & SEC_ALLOC) != 0) 1883 ++ret; 1884 1885 return ret; 1886 } 1887 1888 /* Add extra PPC sections -- Note, for now, make .sbss2 and 1889 .PPC.EMB.sbss0 a normal section, and not a bss section so 1890 that the linker doesn't crater when trying to make more than 1891 2 sections. */ 1892 1893 static const struct bfd_elf_special_section ppc_elf_special_sections[] = 1894 { 1895 { ".plt", 4, 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR }, 1896 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, 1897 { ".sbss2", 6, -2, SHT_PROGBITS, SHF_ALLOC }, 1898 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, 1899 { ".sdata2", 7, -2, SHT_PROGBITS, SHF_ALLOC }, 1900 { ".tags", 5, 0, SHT_ORDERED, SHF_ALLOC }, 1901 { ".PPC.EMB.apuinfo", 16, 0, SHT_NOTE, 0 }, 1902 { ".PPC.EMB.sbss0", 14, 0, SHT_PROGBITS, SHF_ALLOC }, 1903 { ".PPC.EMB.sdata0", 15, 0, SHT_PROGBITS, SHF_ALLOC }, 1904 { NULL, 0, 0, 0, 0 } 1905 }; 1906 1907 /* This is what we want for new plt/got. */ 1908 static struct bfd_elf_special_section ppc_alt_plt = 1909 { ".plt", 4, 0, SHT_PROGBITS, SHF_ALLOC }; 1910 1911 static const struct bfd_elf_special_section * 1912 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec) 1913 { 1914 const struct bfd_elf_special_section *ssect; 1915 1916 /* See if this is one of the special sections. */ 1917 if (sec->name == NULL) 1918 return NULL; 1919 1920 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections, 1921 sec->use_rela_p); 1922 if (ssect != NULL) 1923 { 1924 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0) 1925 ssect = &ppc_alt_plt; 1926 return ssect; 1927 } 1928 1929 return _bfd_elf_get_sec_type_attr (abfd, sec); 1930 } 1931 1932 /* Very simple linked list structure for recording apuinfo values. */ 1933 typedef struct apuinfo_list 1934 { 1935 struct apuinfo_list *next; 1936 unsigned long value; 1937 } 1938 apuinfo_list; 1939 1940 static apuinfo_list *head; 1941 1942 1943 static void 1944 apuinfo_list_init (void) 1945 { 1946 head = NULL; 1947 } 1948 1949 static void 1950 apuinfo_list_add (unsigned long value) 1951 { 1952 apuinfo_list *entry = head; 1953 1954 while (entry != NULL) 1955 { 1956 if (entry->value == value) 1957 return; 1958 entry = entry->next; 1959 } 1960 1961 entry = bfd_malloc (sizeof (* entry)); 1962 if (entry == NULL) 1963 return; 1964 1965 entry->value = value; 1966 entry->next = head; 1967 head = entry; 1968 } 1969 1970 static unsigned 1971 apuinfo_list_length (void) 1972 { 1973 apuinfo_list *entry; 1974 unsigned long count; 1975 1976 for (entry = head, count = 0; 1977 entry; 1978 entry = entry->next) 1979 ++ count; 1980 1981 return count; 1982 } 1983 1984 static inline unsigned long 1985 apuinfo_list_element (unsigned long number) 1986 { 1987 apuinfo_list * entry; 1988 1989 for (entry = head; 1990 entry && number --; 1991 entry = entry->next) 1992 ; 1993 1994 return entry ? entry->value : 0; 1995 } 1996 1997 static void 1998 apuinfo_list_finish (void) 1999 { 2000 apuinfo_list *entry; 2001 2002 for (entry = head; entry;) 2003 { 2004 apuinfo_list *next = entry->next; 2005 free (entry); 2006 entry = next; 2007 } 2008 2009 head = NULL; 2010 } 2011 2012 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo" 2013 #define APUINFO_LABEL "APUinfo" 2014 2015 /* Scan the input BFDs and create a linked list of 2016 the APUinfo values that will need to be emitted. */ 2017 2018 static void 2019 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info) 2020 { 2021 bfd *ibfd; 2022 asection *asec; 2023 char *buffer; 2024 unsigned num_input_sections; 2025 bfd_size_type output_section_size; 2026 unsigned i; 2027 unsigned num_entries; 2028 unsigned long offset; 2029 unsigned long length; 2030 const char *error_message = NULL; 2031 2032 if (link_info == NULL) 2033 return; 2034 2035 /* Scan the input bfds, looking for apuinfo sections. */ 2036 num_input_sections = 0; 2037 output_section_size = 0; 2038 2039 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next) 2040 { 2041 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME); 2042 if (asec) 2043 { 2044 ++ num_input_sections; 2045 output_section_size += asec->size; 2046 } 2047 } 2048 2049 /* We need at least one input sections 2050 in order to make merging worthwhile. */ 2051 if (num_input_sections < 1) 2052 return; 2053 2054 /* Just make sure that the output section exists as well. */ 2055 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); 2056 if (asec == NULL) 2057 return; 2058 2059 /* Allocate a buffer for the contents of the input sections. */ 2060 buffer = bfd_malloc (output_section_size); 2061 if (buffer == NULL) 2062 return; 2063 2064 offset = 0; 2065 apuinfo_list_init (); 2066 2067 /* Read in the input sections contents. */ 2068 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next) 2069 { 2070 unsigned long datum; 2071 char *ptr; 2072 2073 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME); 2074 if (asec == NULL) 2075 continue; 2076 2077 length = asec->size; 2078 if (length < 24) 2079 { 2080 error_message = _("corrupt or empty %s section in %B"); 2081 goto fail; 2082 } 2083 2084 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0 2085 || (bfd_bread (buffer + offset, length, ibfd) != length)) 2086 { 2087 error_message = _("unable to read in %s section from %B"); 2088 goto fail; 2089 } 2090 2091 /* Process the contents of the section. */ 2092 ptr = buffer + offset; 2093 error_message = _("corrupt %s section in %B"); 2094 2095 /* Verify the contents of the header. Note - we have to 2096 extract the values this way in order to allow for a 2097 host whose endian-ness is different from the target. */ 2098 datum = bfd_get_32 (ibfd, ptr); 2099 if (datum != sizeof APUINFO_LABEL) 2100 goto fail; 2101 2102 datum = bfd_get_32 (ibfd, ptr + 8); 2103 if (datum != 0x2) 2104 goto fail; 2105 2106 if (strcmp (ptr + 12, APUINFO_LABEL) != 0) 2107 goto fail; 2108 2109 /* Get the number of bytes used for apuinfo entries. */ 2110 datum = bfd_get_32 (ibfd, ptr + 4); 2111 if (datum + 20 != length) 2112 goto fail; 2113 2114 /* Make sure that we do not run off the end of the section. */ 2115 if (offset + length > output_section_size) 2116 goto fail; 2117 2118 /* Scan the apuinfo section, building a list of apuinfo numbers. */ 2119 for (i = 0; i < datum; i += 4) 2120 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i)); 2121 2122 /* Update the offset. */ 2123 offset += length; 2124 } 2125 2126 error_message = NULL; 2127 2128 /* Compute the size of the output section. */ 2129 num_entries = apuinfo_list_length (); 2130 output_section_size = 20 + num_entries * 4; 2131 2132 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); 2133 2134 if (! bfd_set_section_size (abfd, asec, output_section_size)) 2135 ibfd = abfd, 2136 error_message = _("warning: unable to set size of %s section in %B"); 2137 2138 fail: 2139 free (buffer); 2140 2141 if (error_message) 2142 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME); 2143 } 2144 2145 /* Prevent the output section from accumulating the input sections' 2146 contents. We have already stored this in our linked list structure. */ 2147 2148 static bfd_boolean 2149 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED, 2150 asection *asec, 2151 bfd_byte *contents ATTRIBUTE_UNUSED) 2152 { 2153 return (apuinfo_list_length () 2154 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0); 2155 } 2156 2157 /* Finally we can generate the output section. */ 2158 2159 static void 2160 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED) 2161 { 2162 bfd_byte *buffer; 2163 asection *asec; 2164 unsigned i; 2165 unsigned num_entries; 2166 bfd_size_type length; 2167 2168 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); 2169 if (asec == NULL) 2170 return; 2171 2172 if (apuinfo_list_length () == 0) 2173 return; 2174 2175 length = asec->size; 2176 if (length < 20) 2177 return; 2178 2179 buffer = bfd_malloc (length); 2180 if (buffer == NULL) 2181 { 2182 (*_bfd_error_handler) 2183 (_("failed to allocate space for new APUinfo section.")); 2184 return; 2185 } 2186 2187 /* Create the apuinfo header. */ 2188 num_entries = apuinfo_list_length (); 2189 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer); 2190 bfd_put_32 (abfd, num_entries * 4, buffer + 4); 2191 bfd_put_32 (abfd, 0x2, buffer + 8); 2192 strcpy ((char *) buffer + 12, APUINFO_LABEL); 2193 2194 length = 20; 2195 for (i = 0; i < num_entries; i++) 2196 { 2197 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length); 2198 length += 4; 2199 } 2200 2201 if (length != asec->size) 2202 (*_bfd_error_handler) (_("failed to compute new APUinfo section.")); 2203 2204 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length)) 2205 (*_bfd_error_handler) (_("failed to install new APUinfo section.")); 2206 2207 free (buffer); 2208 2209 apuinfo_list_finish (); 2210 } 2211 2212 /* The following functions are specific to the ELF linker, while 2213 functions above are used generally. They appear in this file more 2214 or less in the order in which they are called. eg. 2215 ppc_elf_check_relocs is called early in the link process, 2216 ppc_elf_finish_dynamic_sections is one of the last functions 2217 called. */ 2218 2219 /* The PPC linker needs to keep track of the number of relocs that it 2220 decides to copy as dynamic relocs in check_relocs for each symbol. 2221 This is so that it can later discard them if they are found to be 2222 unnecessary. We store the information in a field extending the 2223 regular ELF linker hash table. */ 2224 2225 struct ppc_elf_dyn_relocs 2226 { 2227 struct ppc_elf_dyn_relocs *next; 2228 2229 /* The input section of the reloc. */ 2230 asection *sec; 2231 2232 /* Total number of relocs copied for the input section. */ 2233 bfd_size_type count; 2234 2235 /* Number of pc-relative relocs copied for the input section. */ 2236 bfd_size_type pc_count; 2237 }; 2238 2239 /* Track PLT entries needed for a given symbol. We might need more 2240 than one glink entry per symbol. */ 2241 struct plt_entry 2242 { 2243 struct plt_entry *next; 2244 2245 /* -fPIC uses multiple GOT sections, one per file, called ".got2". 2246 This field stores the offset into .got2 used to initialise the 2247 GOT pointer reg. It will always be at least 32768 (and for 2248 current gcc this is the only offset used). */ 2249 bfd_vma addend; 2250 2251 /* The .got2 section. */ 2252 asection *sec; 2253 2254 /* PLT refcount or offset. */ 2255 union 2256 { 2257 bfd_signed_vma refcount; 2258 bfd_vma offset; 2259 } plt; 2260 2261 /* .glink stub offset. */ 2262 bfd_vma glink_offset; 2263 }; 2264 2265 /* Of those relocs that might be copied as dynamic relocs, this macro 2266 selects those that must be copied when linking a shared library, 2267 even when the symbol is local. */ 2268 2269 #define MUST_BE_DYN_RELOC(RTYPE) \ 2270 ((RTYPE) != R_PPC_REL24 \ 2271 && (RTYPE) != R_PPC_REL14 \ 2272 && (RTYPE) != R_PPC_REL14_BRTAKEN \ 2273 && (RTYPE) != R_PPC_REL14_BRNTAKEN \ 2274 && (RTYPE) != R_PPC_REL32) 2275 2276 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid 2277 copying dynamic variables from a shared lib into an app's dynbss 2278 section, and instead use a dynamic relocation to point into the 2279 shared lib. */ 2280 #define ELIMINATE_COPY_RELOCS 1 2281 2282 /* PPC ELF linker hash entry. */ 2283 2284 struct ppc_elf_link_hash_entry 2285 { 2286 struct elf_link_hash_entry elf; 2287 2288 /* If this symbol is used in the linker created sections, the processor 2289 specific backend uses this field to map the field into the offset 2290 from the beginning of the section. */ 2291 elf_linker_section_pointers_t *linker_section_pointer; 2292 2293 /* Track dynamic relocs copied for this symbol. */ 2294 struct ppc_elf_dyn_relocs *dyn_relocs; 2295 2296 /* Contexts in which symbol is used in the GOT (or TOC). 2297 TLS_GD .. TLS_TLS bits are or'd into the mask as the 2298 corresponding relocs are encountered during check_relocs. 2299 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to 2300 indicate the corresponding GOT entry type is not needed. */ 2301 #define TLS_GD 1 /* GD reloc. */ 2302 #define TLS_LD 2 /* LD reloc. */ 2303 #define TLS_TPREL 4 /* TPREL reloc, => IE. */ 2304 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */ 2305 #define TLS_TLS 16 /* Any TLS reloc. */ 2306 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */ 2307 char tls_mask; 2308 2309 /* Nonzero if we have seen a small data relocation referring to this 2310 symbol. */ 2311 unsigned char has_sda_refs; 2312 }; 2313 2314 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent)) 2315 2316 enum ppc_elf_plt_type { 2317 PLT_UNSET, 2318 PLT_OLD, 2319 PLT_NEW, 2320 PLT_VXWORKS 2321 }; 2322 2323 /* PPC ELF linker hash table. */ 2324 2325 struct ppc_elf_link_hash_table 2326 { 2327 struct elf_link_hash_table elf; 2328 2329 /* Short-cuts to get to dynamic linker sections. */ 2330 asection *got; 2331 asection *relgot; 2332 asection *glink; 2333 asection *plt; 2334 asection *relplt; 2335 asection *dynbss; 2336 asection *relbss; 2337 asection *dynsbss; 2338 asection *relsbss; 2339 elf_linker_section_t sdata[2]; 2340 asection *sbss; 2341 2342 /* Shortcut to .__tls_get_addr. */ 2343 struct elf_link_hash_entry *tls_get_addr; 2344 2345 /* TLS local dynamic got entry handling. */ 2346 union { 2347 bfd_signed_vma refcount; 2348 bfd_vma offset; 2349 } tlsld_got; 2350 2351 /* Offset of PltResolve function in glink. */ 2352 bfd_vma glink_pltresolve; 2353 2354 /* Size of reserved GOT entries. */ 2355 unsigned int got_header_size; 2356 /* Non-zero if allocating the header left a gap. */ 2357 unsigned int got_gap; 2358 2359 /* The type of PLT we have chosen to use. */ 2360 enum ppc_elf_plt_type plt_type; 2361 2362 /* Whether we can use the new PLT layout. */ 2363 unsigned int can_use_new_plt:1; 2364 2365 /* Set if we should emit symbols for stubs. */ 2366 unsigned int emit_stub_syms:1; 2367 2368 /* Small local sym to section mapping cache. */ 2369 struct sym_sec_cache sym_sec; 2370 2371 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */ 2372 asection *srelplt2; 2373 2374 /* The .got.plt section (VxWorks only)*/ 2375 asection *sgotplt; 2376 2377 /* True if the target system is VxWorks. */ 2378 int is_vxworks; 2379 2380 /* The size of PLT entries. */ 2381 int plt_entry_size; 2382 /* The distance between adjacent PLT slots. */ 2383 int plt_slot_size; 2384 /* The size of the first PLT entry. */ 2385 int plt_initial_entry_size; 2386 }; 2387 2388 /* Get the PPC ELF linker hash table from a link_info structure. */ 2389 2390 #define ppc_elf_hash_table(p) \ 2391 ((struct ppc_elf_link_hash_table *) (p)->hash) 2392 2393 /* Create an entry in a PPC ELF linker hash table. */ 2394 2395 static struct bfd_hash_entry * 2396 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry, 2397 struct bfd_hash_table *table, 2398 const char *string) 2399 { 2400 /* Allocate the structure if it has not already been allocated by a 2401 subclass. */ 2402 if (entry == NULL) 2403 { 2404 entry = bfd_hash_allocate (table, 2405 sizeof (struct ppc_elf_link_hash_entry)); 2406 if (entry == NULL) 2407 return entry; 2408 } 2409 2410 /* Call the allocation method of the superclass. */ 2411 entry = _bfd_elf_link_hash_newfunc (entry, table, string); 2412 if (entry != NULL) 2413 { 2414 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL; 2415 ppc_elf_hash_entry (entry)->dyn_relocs = NULL; 2416 ppc_elf_hash_entry (entry)->tls_mask = 0; 2417 } 2418 2419 return entry; 2420 } 2421 2422 /* Create a PPC ELF linker hash table. */ 2423 2424 static struct bfd_link_hash_table * 2425 ppc_elf_link_hash_table_create (bfd *abfd) 2426 { 2427 struct ppc_elf_link_hash_table *ret; 2428 2429 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table)); 2430 if (ret == NULL) 2431 return NULL; 2432 2433 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, 2434 ppc_elf_link_hash_newfunc, 2435 sizeof (struct ppc_elf_link_hash_entry))) 2436 { 2437 free (ret); 2438 return NULL; 2439 } 2440 2441 ret->elf.init_plt_refcount.refcount = 0; 2442 ret->elf.init_plt_refcount.glist = NULL; 2443 ret->elf.init_plt_offset.offset = 0; 2444 ret->elf.init_plt_offset.glist = NULL; 2445 2446 ret->sdata[0].name = ".sdata"; 2447 ret->sdata[0].sym_name = "_SDA_BASE_"; 2448 ret->sdata[0].bss_name = ".sbss"; 2449 2450 ret->sdata[1].name = ".sdata2"; 2451 ret->sdata[1].sym_name = "_SDA2_BASE_"; 2452 ret->sdata[1].bss_name = ".sbss2"; 2453 2454 ret->plt_entry_size = 12; 2455 ret->plt_slot_size = 8; 2456 ret->plt_initial_entry_size = 72; 2457 2458 ret->is_vxworks = 0; 2459 2460 return &ret->elf.root; 2461 } 2462 2463 /* Create .got and the related sections. */ 2464 2465 static bfd_boolean 2466 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info) 2467 { 2468 struct ppc_elf_link_hash_table *htab; 2469 asection *s; 2470 flagword flags; 2471 2472 if (!_bfd_elf_create_got_section (abfd, info)) 2473 return FALSE; 2474 2475 htab = ppc_elf_hash_table (info); 2476 htab->got = s = bfd_get_section_by_name (abfd, ".got"); 2477 if (s == NULL) 2478 abort (); 2479 2480 if (htab->is_vxworks) 2481 { 2482 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt"); 2483 if (!htab->sgotplt) 2484 abort (); 2485 } 2486 else 2487 { 2488 /* The powerpc .got has a blrl instruction in it. Mark it 2489 executable. */ 2490 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS 2491 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 2492 if (!bfd_set_section_flags (abfd, s, flags)) 2493 return FALSE; 2494 } 2495 2496 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY 2497 | SEC_LINKER_CREATED | SEC_READONLY); 2498 htab->relgot = bfd_make_section_with_flags (abfd, ".rela.got", flags); 2499 if (!htab->relgot 2500 || ! bfd_set_section_alignment (abfd, htab->relgot, 2)) 2501 return FALSE; 2502 2503 return TRUE; 2504 } 2505 2506 /* We have to create .dynsbss and .rela.sbss here so that they get mapped 2507 to output sections (just like _bfd_elf_create_dynamic_sections has 2508 to create .dynbss and .rela.bss). */ 2509 2510 static bfd_boolean 2511 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) 2512 { 2513 struct ppc_elf_link_hash_table *htab; 2514 asection *s; 2515 flagword flags; 2516 2517 htab = ppc_elf_hash_table (info); 2518 2519 if (htab->got == NULL 2520 && !ppc_elf_create_got (abfd, info)) 2521 return FALSE; 2522 2523 if (!_bfd_elf_create_dynamic_sections (abfd, info)) 2524 return FALSE; 2525 2526 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS 2527 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 2528 2529 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags | SEC_CODE); 2530 htab->glink = s; 2531 if (s == NULL 2532 || !bfd_set_section_alignment (abfd, s, 4)) 2533 return FALSE; 2534 2535 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss"); 2536 s = bfd_make_section_with_flags (abfd, ".dynsbss", 2537 SEC_ALLOC | SEC_LINKER_CREATED); 2538 htab->dynsbss = s; 2539 if (s == NULL) 2540 return FALSE; 2541 2542 if (! info->shared) 2543 { 2544 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss"); 2545 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags); 2546 htab->relsbss = s; 2547 if (s == NULL 2548 || ! bfd_set_section_alignment (abfd, s, 2)) 2549 return FALSE; 2550 } 2551 2552 if (htab->is_vxworks 2553 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2)) 2554 return FALSE; 2555 2556 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt"); 2557 htab->plt = s = bfd_get_section_by_name (abfd, ".plt"); 2558 if (s == NULL) 2559 abort (); 2560 2561 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED; 2562 if (htab->plt_type == PLT_VXWORKS) 2563 /* The VxWorks PLT is a loaded section with contents. */ 2564 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY; 2565 return bfd_set_section_flags (abfd, s, flags); 2566 } 2567 2568 /* Copy the extra info we tack onto an elf_link_hash_entry. */ 2569 2570 static void 2571 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info, 2572 struct elf_link_hash_entry *dir, 2573 struct elf_link_hash_entry *ind) 2574 { 2575 struct ppc_elf_link_hash_entry *edir, *eind; 2576 2577 edir = (struct ppc_elf_link_hash_entry *) dir; 2578 eind = (struct ppc_elf_link_hash_entry *) ind; 2579 2580 if (eind->dyn_relocs != NULL) 2581 { 2582 if (edir->dyn_relocs != NULL) 2583 { 2584 struct ppc_elf_dyn_relocs **pp; 2585 struct ppc_elf_dyn_relocs *p; 2586 2587 /* Add reloc counts against the indirect sym to the direct sym 2588 list. Merge any entries against the same section. */ 2589 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) 2590 { 2591 struct ppc_elf_dyn_relocs *q; 2592 2593 for (q = edir->dyn_relocs; q != NULL; q = q->next) 2594 if (q->sec == p->sec) 2595 { 2596 q->pc_count += p->pc_count; 2597 q->count += p->count; 2598 *pp = p->next; 2599 break; 2600 } 2601 if (q == NULL) 2602 pp = &p->next; 2603 } 2604 *pp = edir->dyn_relocs; 2605 } 2606 2607 edir->dyn_relocs = eind->dyn_relocs; 2608 eind->dyn_relocs = NULL; 2609 } 2610 2611 edir->tls_mask |= eind->tls_mask; 2612 edir->has_sda_refs |= eind->has_sda_refs; 2613 2614 /* If called to transfer flags for a weakdef during processing 2615 of elf_adjust_dynamic_symbol, don't copy non_got_ref. 2616 We clear it ourselves for ELIMINATE_COPY_RELOCS. */ 2617 if (!(ELIMINATE_COPY_RELOCS 2618 && eind->elf.root.type != bfd_link_hash_indirect 2619 && edir->elf.dynamic_adjusted)) 2620 edir->elf.non_got_ref |= eind->elf.non_got_ref; 2621 2622 edir->elf.ref_dynamic |= eind->elf.ref_dynamic; 2623 edir->elf.ref_regular |= eind->elf.ref_regular; 2624 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak; 2625 edir->elf.needs_plt |= eind->elf.needs_plt; 2626 2627 /* If we were called to copy over info for a weak sym, that's all. */ 2628 if (eind->elf.root.type != bfd_link_hash_indirect) 2629 return; 2630 2631 /* Copy over the GOT refcount entries that we may have already seen to 2632 the symbol which just became indirect. */ 2633 edir->elf.got.refcount += eind->elf.got.refcount; 2634 eind->elf.got.refcount = 0; 2635 2636 /* And plt entries. */ 2637 if (eind->elf.plt.plist != NULL) 2638 { 2639 if (edir->elf.plt.plist != NULL) 2640 { 2641 struct plt_entry **entp; 2642 struct plt_entry *ent; 2643 2644 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; ) 2645 { 2646 struct plt_entry *dent; 2647 2648 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next) 2649 if (dent->sec == ent->sec && dent->addend == ent->addend) 2650 { 2651 dent->plt.refcount += ent->plt.refcount; 2652 *entp = ent->next; 2653 break; 2654 } 2655 if (dent == NULL) 2656 entp = &ent->next; 2657 } 2658 *entp = edir->elf.plt.plist; 2659 } 2660 2661 edir->elf.plt.plist = eind->elf.plt.plist; 2662 eind->elf.plt.plist = NULL; 2663 } 2664 2665 if (eind->elf.dynindx != -1) 2666 { 2667 if (edir->elf.dynindx != -1) 2668 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, 2669 edir->elf.dynstr_index); 2670 edir->elf.dynindx = eind->elf.dynindx; 2671 edir->elf.dynstr_index = eind->elf.dynstr_index; 2672 eind->elf.dynindx = -1; 2673 eind->elf.dynstr_index = 0; 2674 } 2675 } 2676 2677 /* Return 1 if target is one of ours. */ 2678 2679 static bfd_boolean 2680 is_ppc_elf_target (const struct bfd_target *targ) 2681 { 2682 extern const bfd_target bfd_elf32_powerpc_vec; 2683 extern const bfd_target bfd_elf32_powerpc_vxworks_vec; 2684 extern const bfd_target bfd_elf32_powerpcle_vec; 2685 2686 return (targ == &bfd_elf32_powerpc_vec 2687 || targ == &bfd_elf32_powerpc_vxworks_vec 2688 || targ == &bfd_elf32_powerpcle_vec); 2689 } 2690 2691 /* Hook called by the linker routine which adds symbols from an object 2692 file. We use it to put .comm items in .sbss, and not .bss. */ 2693 2694 static bfd_boolean 2695 ppc_elf_add_symbol_hook (bfd *abfd, 2696 struct bfd_link_info *info, 2697 Elf_Internal_Sym *sym, 2698 const char **namep ATTRIBUTE_UNUSED, 2699 flagword *flagsp ATTRIBUTE_UNUSED, 2700 asection **secp, 2701 bfd_vma *valp) 2702 { 2703 if (sym->st_shndx == SHN_COMMON 2704 && !info->relocatable 2705 && sym->st_size <= elf_gp_size (abfd) 2706 && is_ppc_elf_target (info->hash->creator)) 2707 { 2708 /* Common symbols less than or equal to -G nn bytes are automatically 2709 put into .sbss. */ 2710 struct ppc_elf_link_hash_table *htab; 2711 2712 htab = ppc_elf_hash_table (info); 2713 if (htab->sbss == NULL) 2714 { 2715 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED; 2716 2717 if (!htab->elf.dynobj) 2718 htab->elf.dynobj = abfd; 2719 2720 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj, 2721 ".sbss", 2722 flags); 2723 if (htab->sbss == NULL) 2724 return FALSE; 2725 } 2726 2727 *secp = htab->sbss; 2728 *valp = sym->st_size; 2729 } 2730 2731 return TRUE; 2732 } 2733 2734 static bfd_boolean 2735 create_sdata_sym (struct ppc_elf_link_hash_table *htab, 2736 elf_linker_section_t *lsect) 2737 { 2738 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name, 2739 TRUE, FALSE, TRUE); 2740 if (lsect->sym == NULL) 2741 return FALSE; 2742 if (lsect->sym->root.type == bfd_link_hash_new) 2743 lsect->sym->non_elf = 0; 2744 lsect->sym->ref_regular = 1; 2745 return TRUE; 2746 } 2747 2748 /* Create a special linker section. */ 2749 2750 static bfd_boolean 2751 ppc_elf_create_linker_section (bfd *abfd, 2752 struct bfd_link_info *info, 2753 flagword flags, 2754 elf_linker_section_t *lsect) 2755 { 2756 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 2757 asection *s; 2758 2759 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY 2760 | SEC_LINKER_CREATED); 2761 2762 /* Record the first bfd that needs the special sections. */ 2763 if (!htab->elf.dynobj) 2764 htab->elf.dynobj = abfd; 2765 2766 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj, 2767 lsect->name, 2768 flags); 2769 if (s == NULL 2770 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2)) 2771 return FALSE; 2772 lsect->section = s; 2773 2774 return create_sdata_sym (htab, lsect); 2775 } 2776 2777 /* Find a linker generated pointer with a given addend and type. */ 2778 2779 static elf_linker_section_pointers_t * 2780 elf_find_pointer_linker_section 2781 (elf_linker_section_pointers_t *linker_pointers, 2782 bfd_vma addend, 2783 elf_linker_section_t *lsect) 2784 { 2785 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next) 2786 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend) 2787 return linker_pointers; 2788 2789 return NULL; 2790 } 2791 2792 /* Allocate a pointer to live in a linker created section. */ 2793 2794 static bfd_boolean 2795 elf_create_pointer_linker_section (bfd *abfd, 2796 elf_linker_section_t *lsect, 2797 struct elf_link_hash_entry *h, 2798 const Elf_Internal_Rela *rel) 2799 { 2800 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL; 2801 elf_linker_section_pointers_t *linker_section_ptr; 2802 unsigned long r_symndx = ELF32_R_SYM (rel->r_info); 2803 bfd_size_type amt; 2804 2805 BFD_ASSERT (lsect != NULL); 2806 2807 /* Is this a global symbol? */ 2808 if (h != NULL) 2809 { 2810 struct ppc_elf_link_hash_entry *eh; 2811 2812 /* Has this symbol already been allocated? If so, our work is done. */ 2813 eh = (struct ppc_elf_link_hash_entry *) h; 2814 if (elf_find_pointer_linker_section (eh->linker_section_pointer, 2815 rel->r_addend, 2816 lsect)) 2817 return TRUE; 2818 2819 ptr_linker_section_ptr = &eh->linker_section_pointer; 2820 } 2821 else 2822 { 2823 /* Allocation of a pointer to a local symbol. */ 2824 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd); 2825 2826 /* Allocate a table to hold the local symbols if first time. */ 2827 if (!ptr) 2828 { 2829 unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info; 2830 2831 amt = num_symbols; 2832 amt *= sizeof (elf_linker_section_pointers_t *); 2833 ptr = bfd_zalloc (abfd, amt); 2834 2835 if (!ptr) 2836 return FALSE; 2837 2838 elf_local_ptr_offsets (abfd) = ptr; 2839 } 2840 2841 /* Has this symbol already been allocated? If so, our work is done. */ 2842 if (elf_find_pointer_linker_section (ptr[r_symndx], 2843 rel->r_addend, 2844 lsect)) 2845 return TRUE; 2846 2847 ptr_linker_section_ptr = &ptr[r_symndx]; 2848 } 2849 2850 /* Allocate space for a pointer in the linker section, and allocate 2851 a new pointer record from internal memory. */ 2852 BFD_ASSERT (ptr_linker_section_ptr != NULL); 2853 amt = sizeof (elf_linker_section_pointers_t); 2854 linker_section_ptr = bfd_alloc (abfd, amt); 2855 2856 if (!linker_section_ptr) 2857 return FALSE; 2858 2859 linker_section_ptr->next = *ptr_linker_section_ptr; 2860 linker_section_ptr->addend = rel->r_addend; 2861 linker_section_ptr->lsect = lsect; 2862 *ptr_linker_section_ptr = linker_section_ptr; 2863 2864 linker_section_ptr->offset = lsect->section->size; 2865 lsect->section->size += 4; 2866 2867 #ifdef DEBUG 2868 fprintf (stderr, 2869 "Create pointer in linker section %s, offset = %ld, section size = %ld\n", 2870 lsect->name, (long) linker_section_ptr->offset, 2871 (long) lsect->section->size); 2872 #endif 2873 2874 return TRUE; 2875 } 2876 2877 static bfd_boolean 2878 update_local_sym_info (bfd *abfd, 2879 Elf_Internal_Shdr *symtab_hdr, 2880 unsigned long r_symndx, 2881 int tls_type) 2882 { 2883 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd); 2884 char *local_got_tls_masks; 2885 2886 if (local_got_refcounts == NULL) 2887 { 2888 bfd_size_type size = symtab_hdr->sh_info; 2889 2890 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks); 2891 local_got_refcounts = bfd_zalloc (abfd, size); 2892 if (local_got_refcounts == NULL) 2893 return FALSE; 2894 elf_local_got_refcounts (abfd) = local_got_refcounts; 2895 } 2896 2897 local_got_refcounts[r_symndx] += 1; 2898 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info); 2899 local_got_tls_masks[r_symndx] |= tls_type; 2900 return TRUE; 2901 } 2902 2903 static bfd_boolean 2904 update_plt_info (bfd *abfd, struct elf_link_hash_entry *h, 2905 asection *sec, bfd_vma addend) 2906 { 2907 struct plt_entry *ent; 2908 2909 if (addend < 32768) 2910 sec = NULL; 2911 for (ent = h->plt.plist; ent != NULL; ent = ent->next) 2912 if (ent->sec == sec && ent->addend == addend) 2913 break; 2914 if (ent == NULL) 2915 { 2916 bfd_size_type amt = sizeof (*ent); 2917 ent = bfd_alloc (abfd, amt); 2918 if (ent == NULL) 2919 return FALSE; 2920 ent->next = h->plt.plist; 2921 ent->sec = sec; 2922 ent->addend = addend; 2923 ent->plt.refcount = 0; 2924 h->plt.plist = ent; 2925 } 2926 ent->plt.refcount += 1; 2927 return TRUE; 2928 } 2929 2930 static struct plt_entry * 2931 find_plt_ent (struct elf_link_hash_entry *h, asection *sec, bfd_vma addend) 2932 { 2933 struct plt_entry *ent; 2934 2935 if (addend < 32768) 2936 sec = NULL; 2937 for (ent = h->plt.plist; ent != NULL; ent = ent->next) 2938 if (ent->sec == sec && ent->addend == addend) 2939 break; 2940 return ent; 2941 } 2942 2943 static void 2944 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type) 2945 { 2946 (*_bfd_error_handler) 2947 (_("%B: relocation %s cannot be used when making a shared object"), 2948 abfd, 2949 ppc_elf_howto_table[r_type]->name); 2950 bfd_set_error (bfd_error_bad_value); 2951 } 2952 2953 /* Look through the relocs for a section during the first phase, and 2954 allocate space in the global offset table or procedure linkage 2955 table. */ 2956 2957 static bfd_boolean 2958 ppc_elf_check_relocs (bfd *abfd, 2959 struct bfd_link_info *info, 2960 asection *sec, 2961 const Elf_Internal_Rela *relocs) 2962 { 2963 struct ppc_elf_link_hash_table *htab; 2964 Elf_Internal_Shdr *symtab_hdr; 2965 struct elf_link_hash_entry **sym_hashes; 2966 const Elf_Internal_Rela *rel; 2967 const Elf_Internal_Rela *rel_end; 2968 asection *got2, *sreloc; 2969 2970 if (info->relocatable) 2971 return TRUE; 2972 2973 /* Don't do anything special with non-loaded, non-alloced sections. 2974 In particular, any relocs in such sections should not affect GOT 2975 and PLT reference counting (ie. we don't allow them to create GOT 2976 or PLT entries), there's no possibility or desire to optimize TLS 2977 relocs, and there's not much point in propagating relocs to shared 2978 libs that the dynamic linker won't relocate. */ 2979 if ((sec->flags & SEC_ALLOC) == 0) 2980 return TRUE; 2981 2982 #ifdef DEBUG 2983 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B", 2984 sec, abfd); 2985 #endif 2986 2987 /* Initialize howto table if not already done. */ 2988 if (!ppc_elf_howto_table[R_PPC_ADDR32]) 2989 ppc_elf_howto_init (); 2990 2991 htab = ppc_elf_hash_table (info); 2992 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 2993 sym_hashes = elf_sym_hashes (abfd); 2994 got2 = bfd_get_section_by_name (abfd, ".got2"); 2995 sreloc = NULL; 2996 2997 rel_end = relocs + sec->reloc_count; 2998 for (rel = relocs; rel < rel_end; rel++) 2999 { 3000 unsigned long r_symndx; 3001 enum elf_ppc_reloc_type r_type; 3002 struct elf_link_hash_entry *h; 3003 int tls_type = 0; 3004 3005 r_symndx = ELF32_R_SYM (rel->r_info); 3006 if (r_symndx < symtab_hdr->sh_info) 3007 h = NULL; 3008 else 3009 { 3010 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 3011 while (h->root.type == bfd_link_hash_indirect 3012 || h->root.type == bfd_link_hash_warning) 3013 h = (struct elf_link_hash_entry *) h->root.u.i.link; 3014 } 3015 3016 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got. 3017 This shows up in particular in an R_PPC_ADDR32 in the eabi 3018 startup code. */ 3019 if (h != NULL 3020 && htab->got == NULL 3021 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) 3022 { 3023 if (htab->elf.dynobj == NULL) 3024 htab->elf.dynobj = abfd; 3025 if (!ppc_elf_create_got (htab->elf.dynobj, info)) 3026 return FALSE; 3027 BFD_ASSERT (h == htab->elf.hgot); 3028 } 3029 3030 r_type = ELF32_R_TYPE (rel->r_info); 3031 switch (r_type) 3032 { 3033 case R_PPC_GOT_TLSLD16: 3034 case R_PPC_GOT_TLSLD16_LO: 3035 case R_PPC_GOT_TLSLD16_HI: 3036 case R_PPC_GOT_TLSLD16_HA: 3037 htab->tlsld_got.refcount += 1; 3038 tls_type = TLS_TLS | TLS_LD; 3039 goto dogottls; 3040 3041 case R_PPC_GOT_TLSGD16: 3042 case R_PPC_GOT_TLSGD16_LO: 3043 case R_PPC_GOT_TLSGD16_HI: 3044 case R_PPC_GOT_TLSGD16_HA: 3045 tls_type = TLS_TLS | TLS_GD; 3046 goto dogottls; 3047 3048 case R_PPC_GOT_TPREL16: 3049 case R_PPC_GOT_TPREL16_LO: 3050 case R_PPC_GOT_TPREL16_HI: 3051 case R_PPC_GOT_TPREL16_HA: 3052 if (info->shared) 3053 info->flags |= DF_STATIC_TLS; 3054 tls_type = TLS_TLS | TLS_TPREL; 3055 goto dogottls; 3056 3057 case R_PPC_GOT_DTPREL16: 3058 case R_PPC_GOT_DTPREL16_LO: 3059 case R_PPC_GOT_DTPREL16_HI: 3060 case R_PPC_GOT_DTPREL16_HA: 3061 tls_type = TLS_TLS | TLS_DTPREL; 3062 dogottls: 3063 sec->has_tls_reloc = 1; 3064 /* Fall thru */ 3065 3066 /* GOT16 relocations */ 3067 case R_PPC_GOT16: 3068 case R_PPC_GOT16_LO: 3069 case R_PPC_GOT16_HI: 3070 case R_PPC_GOT16_HA: 3071 /* This symbol requires a global offset table entry. */ 3072 if (htab->got == NULL) 3073 { 3074 if (htab->elf.dynobj == NULL) 3075 htab->elf.dynobj = abfd; 3076 if (!ppc_elf_create_got (htab->elf.dynobj, info)) 3077 return FALSE; 3078 } 3079 if (h != NULL) 3080 { 3081 h->got.refcount += 1; 3082 ppc_elf_hash_entry (h)->tls_mask |= tls_type; 3083 } 3084 else 3085 /* This is a global offset table entry for a local symbol. */ 3086 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type)) 3087 return FALSE; 3088 break; 3089 3090 /* Indirect .sdata relocation. */ 3091 case R_PPC_EMB_SDAI16: 3092 if (info->shared) 3093 { 3094 bad_shared_reloc (abfd, r_type); 3095 return FALSE; 3096 } 3097 if (htab->sdata[0].section == NULL 3098 && !ppc_elf_create_linker_section (abfd, info, 0, 3099 &htab->sdata[0])) 3100 return FALSE; 3101 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0], 3102 h, rel)) 3103 return FALSE; 3104 if (h != NULL) 3105 { 3106 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 3107 h->non_got_ref = TRUE; 3108 } 3109 break; 3110 3111 /* Indirect .sdata2 relocation. */ 3112 case R_PPC_EMB_SDA2I16: 3113 if (info->shared) 3114 { 3115 bad_shared_reloc (abfd, r_type); 3116 return FALSE; 3117 } 3118 if (htab->sdata[1].section == NULL 3119 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY, 3120 &htab->sdata[1])) 3121 return FALSE; 3122 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1], 3123 h, rel)) 3124 return FALSE; 3125 if (h != NULL) 3126 { 3127 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 3128 h->non_got_ref = TRUE; 3129 } 3130 break; 3131 3132 case R_PPC_SDAREL16: 3133 if (info->shared) 3134 { 3135 bad_shared_reloc (abfd, r_type); 3136 return FALSE; 3137 } 3138 if (htab->sdata[0].sym == NULL 3139 && !create_sdata_sym (htab, &htab->sdata[0])) 3140 return FALSE; 3141 if (h != NULL) 3142 { 3143 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 3144 h->non_got_ref = TRUE; 3145 } 3146 break; 3147 3148 case R_PPC_EMB_SDA2REL: 3149 if (info->shared) 3150 { 3151 bad_shared_reloc (abfd, r_type); 3152 return FALSE; 3153 } 3154 if (htab->sdata[1].sym == NULL 3155 && !create_sdata_sym (htab, &htab->sdata[1])) 3156 return FALSE; 3157 if (h != NULL) 3158 { 3159 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 3160 h->non_got_ref = TRUE; 3161 } 3162 break; 3163 3164 case R_PPC_EMB_SDA21: 3165 case R_PPC_EMB_RELSDA: 3166 if (info->shared) 3167 { 3168 bad_shared_reloc (abfd, r_type); 3169 return FALSE; 3170 } 3171 if (htab->sdata[0].sym == NULL 3172 && !create_sdata_sym (htab, &htab->sdata[0])) 3173 return FALSE; 3174 if (htab->sdata[1].sym == NULL 3175 && !create_sdata_sym (htab, &htab->sdata[1])) 3176 return FALSE; 3177 if (h != NULL) 3178 { 3179 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 3180 h->non_got_ref = TRUE; 3181 } 3182 break; 3183 3184 case R_PPC_EMB_NADDR32: 3185 case R_PPC_EMB_NADDR16: 3186 case R_PPC_EMB_NADDR16_LO: 3187 case R_PPC_EMB_NADDR16_HI: 3188 case R_PPC_EMB_NADDR16_HA: 3189 if (info->shared) 3190 { 3191 bad_shared_reloc (abfd, r_type); 3192 return FALSE; 3193 } 3194 if (h != NULL) 3195 h->non_got_ref = TRUE; 3196 break; 3197 3198 case R_PPC_PLT32: 3199 case R_PPC_PLTREL24: 3200 case R_PPC_PLTREL32: 3201 case R_PPC_PLT16_LO: 3202 case R_PPC_PLT16_HI: 3203 case R_PPC_PLT16_HA: 3204 #ifdef DEBUG 3205 fprintf (stderr, "Reloc requires a PLT entry\n"); 3206 #endif 3207 /* This symbol requires a procedure linkage table entry. We 3208 actually build the entry in finish_dynamic_symbol, 3209 because this might be a case of linking PIC code without 3210 linking in any dynamic objects, in which case we don't 3211 need to generate a procedure linkage table after all. */ 3212 3213 if (h == NULL) 3214 { 3215 /* It does not make sense to have a procedure linkage 3216 table entry for a local symbol. */ 3217 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against " 3218 "local symbol"), 3219 abfd, 3220 sec, 3221 (long) rel->r_offset, 3222 ppc_elf_howto_table[r_type]->name); 3223 bfd_set_error (bfd_error_bad_value); 3224 return FALSE; 3225 } 3226 else 3227 { 3228 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0; 3229 3230 h->needs_plt = 1; 3231 if (!update_plt_info (abfd, h, got2, addend)) 3232 return FALSE; 3233 } 3234 break; 3235 3236 /* The following relocations don't need to propagate the 3237 relocation if linking a shared object since they are 3238 section relative. */ 3239 case R_PPC_SECTOFF: 3240 case R_PPC_SECTOFF_LO: 3241 case R_PPC_SECTOFF_HI: 3242 case R_PPC_SECTOFF_HA: 3243 case R_PPC_DTPREL16: 3244 case R_PPC_DTPREL16_LO: 3245 case R_PPC_DTPREL16_HI: 3246 case R_PPC_DTPREL16_HA: 3247 case R_PPC_TOC16: 3248 break; 3249 3250 case R_PPC_REL16: 3251 case R_PPC_REL16_LO: 3252 case R_PPC_REL16_HI: 3253 case R_PPC_REL16_HA: 3254 htab->can_use_new_plt = 1; 3255 break; 3256 3257 /* These are just markers. */ 3258 case R_PPC_TLS: 3259 case R_PPC_EMB_MRKREF: 3260 case R_PPC_NONE: 3261 case R_PPC_max: 3262 break; 3263 3264 /* These should only appear in dynamic objects. */ 3265 case R_PPC_COPY: 3266 case R_PPC_GLOB_DAT: 3267 case R_PPC_JMP_SLOT: 3268 case R_PPC_RELATIVE: 3269 break; 3270 3271 /* These aren't handled yet. We'll report an error later. */ 3272 case R_PPC_ADDR30: 3273 case R_PPC_EMB_RELSEC16: 3274 case R_PPC_EMB_RELST_LO: 3275 case R_PPC_EMB_RELST_HI: 3276 case R_PPC_EMB_RELST_HA: 3277 case R_PPC_EMB_BIT_FLD: 3278 break; 3279 3280 /* This refers only to functions defined in the shared library. */ 3281 case R_PPC_LOCAL24PC: 3282 if (h && h == htab->elf.hgot && htab->plt_type == PLT_UNSET) 3283 htab->plt_type = PLT_OLD; 3284 break; 3285 3286 /* This relocation describes the C++ object vtable hierarchy. 3287 Reconstruct it for later use during GC. */ 3288 case R_PPC_GNU_VTINHERIT: 3289 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 3290 return FALSE; 3291 break; 3292 3293 /* This relocation describes which C++ vtable entries are actually 3294 used. Record for later use during GC. */ 3295 case R_PPC_GNU_VTENTRY: 3296 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 3297 return FALSE; 3298 break; 3299 3300 /* We shouldn't really be seeing these. */ 3301 case R_PPC_TPREL32: 3302 if (info->shared) 3303 info->flags |= DF_STATIC_TLS; 3304 goto dodyn; 3305 3306 /* Nor these. */ 3307 case R_PPC_DTPMOD32: 3308 case R_PPC_DTPREL32: 3309 goto dodyn; 3310 3311 case R_PPC_TPREL16: 3312 case R_PPC_TPREL16_LO: 3313 case R_PPC_TPREL16_HI: 3314 case R_PPC_TPREL16_HA: 3315 if (info->shared) 3316 info->flags |= DF_STATIC_TLS; 3317 goto dodyn; 3318 3319 case R_PPC_REL32: 3320 if (h == NULL 3321 && got2 != NULL 3322 && (sec->flags & SEC_CODE) != 0 3323 && (info->shared || info->pie) 3324 && htab->plt_type == PLT_UNSET) 3325 { 3326 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before 3327 the start of a function, which assembles to a REL32 3328 reference to .got2. If we detect one of these, then 3329 force the old PLT layout because the linker cannot 3330 reliably deduce the GOT pointer value needed for 3331 PLT call stubs. */ 3332 asection *s; 3333 3334 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec, 3335 r_symndx); 3336 if (s == got2) 3337 htab->plt_type = PLT_OLD; 3338 } 3339 if (h == NULL || h == htab->elf.hgot) 3340 break; 3341 goto dodyn1; 3342 3343 case R_PPC_REL24: 3344 case R_PPC_REL14: 3345 case R_PPC_REL14_BRTAKEN: 3346 case R_PPC_REL14_BRNTAKEN: 3347 if (h == NULL) 3348 break; 3349 if (h == htab->elf.hgot) 3350 { 3351 if (htab->plt_type == PLT_UNSET) 3352 htab->plt_type = PLT_OLD; 3353 break; 3354 } 3355 /* fall through */ 3356 3357 case R_PPC_ADDR32: 3358 case R_PPC_ADDR24: 3359 case R_PPC_ADDR16: 3360 case R_PPC_ADDR16_LO: 3361 case R_PPC_ADDR16_HI: 3362 case R_PPC_ADDR16_HA: 3363 case R_PPC_ADDR14: 3364 case R_PPC_ADDR14_BRTAKEN: 3365 case R_PPC_ADDR14_BRNTAKEN: 3366 case R_PPC_UADDR32: 3367 case R_PPC_UADDR16: 3368 dodyn1: 3369 if (h != NULL && !info->shared) 3370 { 3371 /* We may need a plt entry if the symbol turns out to be 3372 a function defined in a dynamic object. */ 3373 if (!update_plt_info (abfd, h, NULL, 0)) 3374 return FALSE; 3375 3376 /* We may need a copy reloc too. */ 3377 h->non_got_ref = 1; 3378 } 3379 3380 dodyn: 3381 /* If we are creating a shared library, and this is a reloc 3382 against a global symbol, or a non PC relative reloc 3383 against a local symbol, then we need to copy the reloc 3384 into the shared library. However, if we are linking with 3385 -Bsymbolic, we do not need to copy a reloc against a 3386 global symbol which is defined in an object we are 3387 including in the link (i.e., DEF_REGULAR is set). At 3388 this point we have not seen all the input files, so it is 3389 possible that DEF_REGULAR is not set now but will be set 3390 later (it is never cleared). In case of a weak definition, 3391 DEF_REGULAR may be cleared later by a strong definition in 3392 a shared library. We account for that possibility below by 3393 storing information in the dyn_relocs field of the hash 3394 table entry. A similar situation occurs when creating 3395 shared libraries and symbol visibility changes render the 3396 symbol local. 3397 3398 If on the other hand, we are creating an executable, we 3399 may need to keep relocations for symbols satisfied by a 3400 dynamic library if we manage to avoid copy relocs for the 3401 symbol. */ 3402 if ((info->shared 3403 && (MUST_BE_DYN_RELOC (r_type) 3404 || (h != NULL 3405 && (! info->symbolic 3406 || h->root.type == bfd_link_hash_defweak 3407 || !h->def_regular)))) 3408 || (ELIMINATE_COPY_RELOCS 3409 && !info->shared 3410 && h != NULL 3411 && (h->root.type == bfd_link_hash_defweak 3412 || !h->def_regular))) 3413 { 3414 struct ppc_elf_dyn_relocs *p; 3415 struct ppc_elf_dyn_relocs **head; 3416 3417 #ifdef DEBUG 3418 fprintf (stderr, 3419 "ppc_elf_check_relocs needs to " 3420 "create relocation for %s\n", 3421 (h && h->root.root.string 3422 ? h->root.root.string : "<unknown>")); 3423 #endif 3424 if (sreloc == NULL) 3425 { 3426 const char *name; 3427 3428 name = (bfd_elf_string_from_elf_section 3429 (abfd, 3430 elf_elfheader (abfd)->e_shstrndx, 3431 elf_section_data (sec)->rel_hdr.sh_name)); 3432 if (name == NULL) 3433 return FALSE; 3434 3435 BFD_ASSERT (strncmp (name, ".rela", 5) == 0 3436 && strcmp (bfd_get_section_name (abfd, sec), 3437 name + 5) == 0); 3438 3439 if (htab->elf.dynobj == NULL) 3440 htab->elf.dynobj = abfd; 3441 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name); 3442 if (sreloc == NULL) 3443 { 3444 flagword flags; 3445 3446 flags = (SEC_HAS_CONTENTS | SEC_READONLY 3447 | SEC_IN_MEMORY | SEC_LINKER_CREATED 3448 | SEC_ALLOC | SEC_LOAD); 3449 sreloc = bfd_make_section_with_flags (htab->elf.dynobj, 3450 name, 3451 flags); 3452 if (sreloc == NULL 3453 || ! bfd_set_section_alignment (htab->elf.dynobj, 3454 sreloc, 2)) 3455 return FALSE; 3456 } 3457 elf_section_data (sec)->sreloc = sreloc; 3458 } 3459 3460 /* If this is a global symbol, we count the number of 3461 relocations we need for this symbol. */ 3462 if (h != NULL) 3463 { 3464 head = &ppc_elf_hash_entry (h)->dyn_relocs; 3465 } 3466 else 3467 { 3468 /* Track dynamic relocs needed for local syms too. 3469 We really need local syms available to do this 3470 easily. Oh well. */ 3471 3472 asection *s; 3473 void *vpp; 3474 3475 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, 3476 sec, r_symndx); 3477 if (s == NULL) 3478 return FALSE; 3479 3480 vpp = &elf_section_data (s)->local_dynrel; 3481 head = (struct ppc_elf_dyn_relocs **) vpp; 3482 } 3483 3484 p = *head; 3485 if (p == NULL || p->sec != sec) 3486 { 3487 p = bfd_alloc (htab->elf.dynobj, sizeof *p); 3488 if (p == NULL) 3489 return FALSE; 3490 p->next = *head; 3491 *head = p; 3492 p->sec = sec; 3493 p->count = 0; 3494 p->pc_count = 0; 3495 } 3496 3497 p->count += 1; 3498 if (!MUST_BE_DYN_RELOC (r_type)) 3499 p->pc_count += 1; 3500 } 3501 3502 break; 3503 } 3504 } 3505 3506 return TRUE; 3507 } 3508 3509 /* Merge backend specific data from an object file to the output 3510 object file when linking. */ 3511 3512 static bfd_boolean 3513 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) 3514 { 3515 flagword old_flags; 3516 flagword new_flags; 3517 bfd_boolean error; 3518 3519 if (!is_ppc_elf_target (ibfd->xvec) 3520 || !is_ppc_elf_target (obfd->xvec)) 3521 return TRUE; 3522 3523 /* Check if we have the same endianess. */ 3524 if (! _bfd_generic_verify_endian_match (ibfd, obfd)) 3525 return FALSE; 3526 3527 new_flags = elf_elfheader (ibfd)->e_flags; 3528 old_flags = elf_elfheader (obfd)->e_flags; 3529 if (!elf_flags_init (obfd)) 3530 { 3531 /* First call, no flags set. */ 3532 elf_flags_init (obfd) = TRUE; 3533 elf_elfheader (obfd)->e_flags = new_flags; 3534 } 3535 3536 /* Compatible flags are ok. */ 3537 else if (new_flags == old_flags) 3538 ; 3539 3540 /* Incompatible flags. */ 3541 else 3542 { 3543 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib 3544 to be linked with either. */ 3545 error = FALSE; 3546 if ((new_flags & EF_PPC_RELOCATABLE) != 0 3547 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0) 3548 { 3549 error = TRUE; 3550 (*_bfd_error_handler) 3551 (_("%B: compiled with -mrelocatable and linked with " 3552 "modules compiled normally"), ibfd); 3553 } 3554 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0 3555 && (old_flags & EF_PPC_RELOCATABLE) != 0) 3556 { 3557 error = TRUE; 3558 (*_bfd_error_handler) 3559 (_("%B: compiled normally and linked with " 3560 "modules compiled with -mrelocatable"), ibfd); 3561 } 3562 3563 /* The output is -mrelocatable-lib iff both the input files are. */ 3564 if (! (new_flags & EF_PPC_RELOCATABLE_LIB)) 3565 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB; 3566 3567 /* The output is -mrelocatable iff it can't be -mrelocatable-lib, 3568 but each input file is either -mrelocatable or -mrelocatable-lib. */ 3569 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB) 3570 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)) 3571 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))) 3572 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE; 3573 3574 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if 3575 any module uses it. */ 3576 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB); 3577 3578 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); 3579 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); 3580 3581 /* Warn about any other mismatches. */ 3582 if (new_flags != old_flags) 3583 { 3584 error = TRUE; 3585 (*_bfd_error_handler) 3586 (_("%B: uses different e_flags (0x%lx) fields " 3587 "than previous modules (0x%lx)"), 3588 ibfd, (long) new_flags, (long) old_flags); 3589 } 3590 3591 if (error) 3592 { 3593 bfd_set_error (bfd_error_bad_value); 3594 return FALSE; 3595 } 3596 } 3597 3598 return TRUE; 3599 } 3600 3601 /* Choose which PLT scheme to use, and set .plt flags appropriately. 3602 Returns -1 on error, 0 for old PLT, 1 for new PLT. */ 3603 int 3604 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED, 3605 struct bfd_link_info *info, 3606 int force_old_plt, 3607 int emit_stub_syms) 3608 { 3609 struct ppc_elf_link_hash_table *htab; 3610 flagword flags; 3611 3612 htab = ppc_elf_hash_table (info); 3613 3614 if (htab->plt_type == PLT_UNSET) 3615 htab->plt_type = (force_old_plt || !htab->can_use_new_plt 3616 ? PLT_OLD : PLT_NEW); 3617 3618 htab->emit_stub_syms = emit_stub_syms; 3619 3620 BFD_ASSERT (htab->plt_type != PLT_VXWORKS); 3621 3622 if (htab->plt_type == PLT_NEW) 3623 { 3624 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS 3625 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 3626 3627 /* The new PLT is a loaded section. */ 3628 if (htab->plt != NULL 3629 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags)) 3630 return -1; 3631 3632 /* The new GOT is not executable. */ 3633 if (htab->got != NULL 3634 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags)) 3635 return -1; 3636 } 3637 else 3638 { 3639 /* Stop an unused .glink section from affecting .text alignment. */ 3640 if (htab->glink != NULL 3641 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0)) 3642 return -1; 3643 } 3644 return htab->plt_type == PLT_NEW; 3645 } 3646 3647 /* Return the section that should be marked against GC for a given 3648 relocation. */ 3649 3650 static asection * 3651 ppc_elf_gc_mark_hook (asection *sec, 3652 struct bfd_link_info *info ATTRIBUTE_UNUSED, 3653 Elf_Internal_Rela *rel, 3654 struct elf_link_hash_entry *h, 3655 Elf_Internal_Sym *sym) 3656 { 3657 if (h != NULL) 3658 { 3659 switch (ELF32_R_TYPE (rel->r_info)) 3660 { 3661 case R_PPC_GNU_VTINHERIT: 3662 case R_PPC_GNU_VTENTRY: 3663 break; 3664 3665 default: 3666 switch (h->root.type) 3667 { 3668 case bfd_link_hash_defined: 3669 case bfd_link_hash_defweak: 3670 return h->root.u.def.section; 3671 3672 case bfd_link_hash_common: 3673 return h->root.u.c.p->section; 3674 3675 default: 3676 break; 3677 } 3678 } 3679 } 3680 else 3681 return bfd_section_from_elf_index (sec->owner, sym->st_shndx); 3682 3683 return NULL; 3684 } 3685 3686 /* Update the got, plt and dynamic reloc reference counts for the 3687 section being removed. */ 3688 3689 static bfd_boolean 3690 ppc_elf_gc_sweep_hook (bfd *abfd, 3691 struct bfd_link_info *info, 3692 asection *sec, 3693 const Elf_Internal_Rela *relocs) 3694 { 3695 struct ppc_elf_link_hash_table *htab; 3696 Elf_Internal_Shdr *symtab_hdr; 3697 struct elf_link_hash_entry **sym_hashes; 3698 bfd_signed_vma *local_got_refcounts; 3699 const Elf_Internal_Rela *rel, *relend; 3700 asection *got2; 3701 3702 if ((sec->flags & SEC_ALLOC) == 0) 3703 return TRUE; 3704 3705 elf_section_data (sec)->local_dynrel = NULL; 3706 3707 htab = ppc_elf_hash_table (info); 3708 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 3709 sym_hashes = elf_sym_hashes (abfd); 3710 local_got_refcounts = elf_local_got_refcounts (abfd); 3711 got2 = bfd_get_section_by_name (abfd, ".got2"); 3712 3713 relend = relocs + sec->reloc_count; 3714 for (rel = relocs; rel < relend; rel++) 3715 { 3716 unsigned long r_symndx; 3717 enum elf_ppc_reloc_type r_type; 3718 struct elf_link_hash_entry *h = NULL; 3719 3720 r_symndx = ELF32_R_SYM (rel->r_info); 3721 if (r_symndx >= symtab_hdr->sh_info) 3722 { 3723 struct ppc_elf_dyn_relocs **pp, *p; 3724 struct ppc_elf_link_hash_entry *eh; 3725 3726 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 3727 while (h->root.type == bfd_link_hash_indirect 3728 || h->root.type == bfd_link_hash_warning) 3729 h = (struct elf_link_hash_entry *) h->root.u.i.link; 3730 eh = (struct ppc_elf_link_hash_entry *) h; 3731 3732 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) 3733 if (p->sec == sec) 3734 { 3735 /* Everything must go for SEC. */ 3736 *pp = p->next; 3737 break; 3738 } 3739 } 3740 3741 r_type = ELF32_R_TYPE (rel->r_info); 3742 switch (r_type) 3743 { 3744 case R_PPC_GOT_TLSLD16: 3745 case R_PPC_GOT_TLSLD16_LO: 3746 case R_PPC_GOT_TLSLD16_HI: 3747 case R_PPC_GOT_TLSLD16_HA: 3748 htab->tlsld_got.refcount -= 1; 3749 /* Fall thru */ 3750 3751 case R_PPC_GOT_TLSGD16: 3752 case R_PPC_GOT_TLSGD16_LO: 3753 case R_PPC_GOT_TLSGD16_HI: 3754 case R_PPC_GOT_TLSGD16_HA: 3755 case R_PPC_GOT_TPREL16: 3756 case R_PPC_GOT_TPREL16_LO: 3757 case R_PPC_GOT_TPREL16_HI: 3758 case R_PPC_GOT_TPREL16_HA: 3759 case R_PPC_GOT_DTPREL16: 3760 case R_PPC_GOT_DTPREL16_LO: 3761 case R_PPC_GOT_DTPREL16_HI: 3762 case R_PPC_GOT_DTPREL16_HA: 3763 case R_PPC_GOT16: 3764 case R_PPC_GOT16_LO: 3765 case R_PPC_GOT16_HI: 3766 case R_PPC_GOT16_HA: 3767 if (h != NULL) 3768 { 3769 if (h->got.refcount > 0) 3770 h->got.refcount--; 3771 } 3772 else if (local_got_refcounts != NULL) 3773 { 3774 if (local_got_refcounts[r_symndx] > 0) 3775 local_got_refcounts[r_symndx]--; 3776 } 3777 break; 3778 3779 case R_PPC_REL24: 3780 case R_PPC_REL14: 3781 case R_PPC_REL14_BRTAKEN: 3782 case R_PPC_REL14_BRNTAKEN: 3783 case R_PPC_REL32: 3784 if (h == NULL || h == htab->elf.hgot) 3785 break; 3786 /* Fall thru */ 3787 3788 case R_PPC_ADDR32: 3789 case R_PPC_ADDR24: 3790 case R_PPC_ADDR16: 3791 case R_PPC_ADDR16_LO: 3792 case R_PPC_ADDR16_HI: 3793 case R_PPC_ADDR16_HA: 3794 case R_PPC_ADDR14: 3795 case R_PPC_ADDR14_BRTAKEN: 3796 case R_PPC_ADDR14_BRNTAKEN: 3797 case R_PPC_UADDR32: 3798 case R_PPC_UADDR16: 3799 if (info->shared) 3800 break; 3801 3802 case R_PPC_PLT32: 3803 case R_PPC_PLTREL24: 3804 case R_PPC_PLTREL32: 3805 case R_PPC_PLT16_LO: 3806 case R_PPC_PLT16_HI: 3807 case R_PPC_PLT16_HA: 3808 if (h != NULL) 3809 { 3810 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0; 3811 struct plt_entry *ent = find_plt_ent (h, got2, addend); 3812 if (ent != NULL && ent->plt.refcount > 0) 3813 ent->plt.refcount -= 1; 3814 } 3815 break; 3816 3817 default: 3818 break; 3819 } 3820 } 3821 return TRUE; 3822 } 3823 3824 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */ 3825 3826 asection * 3827 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info) 3828 { 3829 struct ppc_elf_link_hash_table *htab; 3830 3831 htab = ppc_elf_hash_table (info); 3832 if (htab->plt_type == PLT_NEW 3833 && htab->plt != NULL 3834 && htab->plt->output_section != NULL) 3835 { 3836 elf_section_type (htab->plt->output_section) = SHT_PROGBITS; 3837 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE; 3838 } 3839 3840 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr", 3841 FALSE, FALSE, TRUE); 3842 return _bfd_elf_tls_setup (obfd, info); 3843 } 3844 3845 /* Run through all the TLS relocs looking for optimization 3846 opportunities. */ 3847 3848 bfd_boolean 3849 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, 3850 struct bfd_link_info *info) 3851 { 3852 bfd *ibfd; 3853 asection *sec; 3854 struct ppc_elf_link_hash_table *htab; 3855 3856 if (info->relocatable || info->shared) 3857 return TRUE; 3858 3859 htab = ppc_elf_hash_table (info); 3860 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) 3861 { 3862 Elf_Internal_Sym *locsyms = NULL; 3863 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 3864 3865 for (sec = ibfd->sections; sec != NULL; sec = sec->next) 3866 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section)) 3867 { 3868 Elf_Internal_Rela *relstart, *rel, *relend; 3869 int expecting_tls_get_addr; 3870 3871 /* Read the relocations. */ 3872 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, 3873 info->keep_memory); 3874 if (relstart == NULL) 3875 return FALSE; 3876 3877 expecting_tls_get_addr = 0; 3878 relend = relstart + sec->reloc_count; 3879 for (rel = relstart; rel < relend; rel++) 3880 { 3881 enum elf_ppc_reloc_type r_type; 3882 unsigned long r_symndx; 3883 struct elf_link_hash_entry *h = NULL; 3884 char *tls_mask; 3885 char tls_set, tls_clear; 3886 bfd_boolean is_local; 3887 3888 r_symndx = ELF32_R_SYM (rel->r_info); 3889 if (r_symndx >= symtab_hdr->sh_info) 3890 { 3891 struct elf_link_hash_entry **sym_hashes; 3892 3893 sym_hashes = elf_sym_hashes (ibfd); 3894 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 3895 while (h->root.type == bfd_link_hash_indirect 3896 || h->root.type == bfd_link_hash_warning) 3897 h = (struct elf_link_hash_entry *) h->root.u.i.link; 3898 } 3899 3900 is_local = FALSE; 3901 if (h == NULL 3902 || !h->def_dynamic) 3903 is_local = TRUE; 3904 3905 r_type = ELF32_R_TYPE (rel->r_info); 3906 switch (r_type) 3907 { 3908 case R_PPC_GOT_TLSLD16: 3909 case R_PPC_GOT_TLSLD16_LO: 3910 case R_PPC_GOT_TLSLD16_HI: 3911 case R_PPC_GOT_TLSLD16_HA: 3912 /* These relocs should never be against a symbol 3913 defined in a shared lib. Leave them alone if 3914 that turns out to be the case. */ 3915 expecting_tls_get_addr = 0; 3916 htab->tlsld_got.refcount -= 1; 3917 if (!is_local) 3918 continue; 3919 3920 /* LD -> LE */ 3921 tls_set = 0; 3922 tls_clear = TLS_LD; 3923 expecting_tls_get_addr = 1; 3924 break; 3925 3926 case R_PPC_GOT_TLSGD16: 3927 case R_PPC_GOT_TLSGD16_LO: 3928 case R_PPC_GOT_TLSGD16_HI: 3929 case R_PPC_GOT_TLSGD16_HA: 3930 if (is_local) 3931 /* GD -> LE */ 3932 tls_set = 0; 3933 else 3934 /* GD -> IE */ 3935 tls_set = TLS_TLS | TLS_TPRELGD; 3936 tls_clear = TLS_GD; 3937 expecting_tls_get_addr = 1; 3938 break; 3939 3940 case R_PPC_GOT_TPREL16: 3941 case R_PPC_GOT_TPREL16_LO: 3942 case R_PPC_GOT_TPREL16_HI: 3943 case R_PPC_GOT_TPREL16_HA: 3944 expecting_tls_get_addr = 0; 3945 if (is_local) 3946 { 3947 /* IE -> LE */ 3948 tls_set = 0; 3949 tls_clear = TLS_TPREL; 3950 break; 3951 } 3952 else 3953 continue; 3954 3955 case R_PPC_REL14: 3956 case R_PPC_REL14_BRTAKEN: 3957 case R_PPC_REL14_BRNTAKEN: 3958 case R_PPC_REL24: 3959 if (expecting_tls_get_addr 3960 && h != NULL 3961 && h == htab->tls_get_addr) 3962 { 3963 struct plt_entry *ent = find_plt_ent (h, NULL, 0); 3964 if (ent != NULL && ent->plt.refcount > 0) 3965 ent->plt.refcount -= 1; 3966 } 3967 expecting_tls_get_addr = 0; 3968 continue; 3969 3970 default: 3971 expecting_tls_get_addr = 0; 3972 continue; 3973 } 3974 3975 if (h != NULL) 3976 { 3977 if (tls_set == 0) 3978 { 3979 /* We managed to get rid of a got entry. */ 3980 if (h->got.refcount > 0) 3981 h->got.refcount -= 1; 3982 } 3983 tls_mask = &ppc_elf_hash_entry (h)->tls_mask; 3984 } 3985 else 3986 { 3987 Elf_Internal_Sym *sym; 3988 bfd_signed_vma *lgot_refs; 3989 char *lgot_masks; 3990 3991 if (locsyms == NULL) 3992 { 3993 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; 3994 if (locsyms == NULL) 3995 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, 3996 symtab_hdr->sh_info, 3997 0, NULL, NULL, NULL); 3998 if (locsyms == NULL) 3999 { 4000 if (elf_section_data (sec)->relocs != relstart) 4001 free (relstart); 4002 return FALSE; 4003 } 4004 } 4005 sym = locsyms + r_symndx; 4006 lgot_refs = elf_local_got_refcounts (ibfd); 4007 if (lgot_refs == NULL) 4008 abort (); 4009 if (tls_set == 0) 4010 { 4011 /* We managed to get rid of a got entry. */ 4012 if (lgot_refs[r_symndx] > 0) 4013 lgot_refs[r_symndx] -= 1; 4014 } 4015 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info); 4016 tls_mask = &lgot_masks[r_symndx]; 4017 } 4018 4019 *tls_mask |= tls_set; 4020 *tls_mask &= ~tls_clear; 4021 } 4022 4023 if (elf_section_data (sec)->relocs != relstart) 4024 free (relstart); 4025 } 4026 4027 if (locsyms != NULL 4028 && (symtab_hdr->contents != (unsigned char *) locsyms)) 4029 { 4030 if (!info->keep_memory) 4031 free (locsyms); 4032 else 4033 symtab_hdr->contents = (unsigned char *) locsyms; 4034 } 4035 } 4036 return TRUE; 4037 } 4038 4039 /* Adjust a symbol defined by a dynamic object and referenced by a 4040 regular object. The current definition is in some section of the 4041 dynamic object, but we're not including those sections. We have to 4042 change the definition to something the rest of the link can 4043 understand. */ 4044 4045 static bfd_boolean 4046 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info, 4047 struct elf_link_hash_entry *h) 4048 { 4049 struct ppc_elf_link_hash_table *htab; 4050 asection *s; 4051 unsigned int power_of_two; 4052 4053 #ifdef DEBUG 4054 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n", 4055 h->root.root.string); 4056 #endif 4057 4058 /* Make sure we know what is going on here. */ 4059 htab = ppc_elf_hash_table (info); 4060 BFD_ASSERT (htab->elf.dynobj != NULL 4061 && (h->needs_plt 4062 || h->u.weakdef != NULL 4063 || (h->def_dynamic 4064 && h->ref_regular 4065 && !h->def_regular))); 4066 4067 /* Deal with function syms. */ 4068 if (h->type == STT_FUNC 4069 || h->needs_plt) 4070 { 4071 /* Clear procedure linkage table information for any symbol that 4072 won't need a .plt entry. */ 4073 struct plt_entry *ent; 4074 for (ent = h->plt.plist; ent != NULL; ent = ent->next) 4075 if (ent->plt.refcount > 0) 4076 break; 4077 if (ent == NULL 4078 || SYMBOL_CALLS_LOCAL (info, h) 4079 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 4080 && h->root.type == bfd_link_hash_undefweak)) 4081 { 4082 /* A PLT entry is not required/allowed when: 4083 4084 1. We are not using ld.so; because then the PLT entry 4085 can't be set up, so we can't use one. In this case, 4086 ppc_elf_adjust_dynamic_symbol won't even be called. 4087 4088 2. GC has rendered the entry unused. 4089 4090 3. We know for certain that a call to this symbol 4091 will go to this object, or will remain undefined. */ 4092 h->plt.plist = NULL; 4093 h->needs_plt = 0; 4094 } 4095 return TRUE; 4096 } 4097 else 4098 h->plt.plist = NULL; 4099 4100 /* If this is a weak symbol, and there is a real definition, the 4101 processor independent code will have arranged for us to see the 4102 real definition first, and we can just use the same value. */ 4103 if (h->u.weakdef != NULL) 4104 { 4105 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined 4106 || h->u.weakdef->root.type == bfd_link_hash_defweak); 4107 h->root.u.def.section = h->u.weakdef->root.u.def.section; 4108 h->root.u.def.value = h->u.weakdef->root.u.def.value; 4109 if (ELIMINATE_COPY_RELOCS) 4110 h->non_got_ref = h->u.weakdef->non_got_ref; 4111 return TRUE; 4112 } 4113 4114 /* This is a reference to a symbol defined by a dynamic object which 4115 is not a function. */ 4116 4117 /* If we are creating a shared library, we must presume that the 4118 only references to the symbol are via the global offset table. 4119 For such cases we need not do anything here; the relocations will 4120 be handled correctly by relocate_section. */ 4121 if (info->shared) 4122 return TRUE; 4123 4124 /* If there are no references to this symbol that do not use the 4125 GOT, we don't need to generate a copy reloc. */ 4126 if (!h->non_got_ref) 4127 return TRUE; 4128 4129 /* If we didn't find any dynamic relocs in read-only sections, then we'll 4130 be keeping the dynamic relocs and avoiding the copy reloc. We can't 4131 do this if there are any small data relocations. */ 4132 if (ELIMINATE_COPY_RELOCS 4133 && !ppc_elf_hash_entry (h)->has_sda_refs) 4134 { 4135 struct ppc_elf_dyn_relocs *p; 4136 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next) 4137 { 4138 s = p->sec->output_section; 4139 if (s != NULL && (s->flags & SEC_READONLY) != 0) 4140 break; 4141 } 4142 4143 if (p == NULL) 4144 { 4145 h->non_got_ref = 0; 4146 return TRUE; 4147 } 4148 } 4149 4150 if (h->size == 0) 4151 { 4152 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"), 4153 h->root.root.string); 4154 return TRUE; 4155 } 4156 4157 /* We must allocate the symbol in our .dynbss section, which will 4158 become part of the .bss section of the executable. There will be 4159 an entry for this symbol in the .dynsym section. The dynamic 4160 object will contain position independent code, so all references 4161 from the dynamic object to this symbol will go through the global 4162 offset table. The dynamic linker will use the .dynsym entry to 4163 determine the address it must put in the global offset table, so 4164 both the dynamic object and the regular object will refer to the 4165 same memory location for the variable. 4166 4167 Of course, if the symbol is referenced using SDAREL relocs, we 4168 must instead allocate it in .sbss. */ 4169 4170 if (ppc_elf_hash_entry (h)->has_sda_refs) 4171 s = htab->dynsbss; 4172 else 4173 s = htab->dynbss; 4174 BFD_ASSERT (s != NULL); 4175 4176 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to 4177 copy the initial value out of the dynamic object and into the 4178 runtime process image. We need to remember the offset into the 4179 .rela.bss section we are going to use. */ 4180 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) 4181 { 4182 asection *srel; 4183 4184 if (ppc_elf_hash_entry (h)->has_sda_refs) 4185 srel = htab->relsbss; 4186 else 4187 srel = htab->relbss; 4188 BFD_ASSERT (srel != NULL); 4189 srel->size += sizeof (Elf32_External_Rela); 4190 h->needs_copy = 1; 4191 } 4192 4193 /* We need to figure out the alignment required for this symbol. I 4194 have no idea how ELF linkers handle this. */ 4195 power_of_two = bfd_log2 (h->size); 4196 if (power_of_two > 4) 4197 power_of_two = 4; 4198 4199 /* Apply the required alignment. */ 4200 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two)); 4201 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s)) 4202 { 4203 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two)) 4204 return FALSE; 4205 } 4206 4207 /* Define the symbol as being at this point in the section. */ 4208 h->root.u.def.section = s; 4209 h->root.u.def.value = s->size; 4210 4211 /* Increment the section size to make room for the symbol. */ 4212 s->size += h->size; 4213 4214 return TRUE; 4215 } 4216 4217 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is 4218 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0, 4219 specifying the addend on the plt relocation. For -fpic code, the sym 4220 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC 4221 xxxxxxxx.got2.plt_pic32.<callee>. */ 4222 4223 static bfd_boolean 4224 add_stub_sym (struct plt_entry *ent, 4225 struct elf_link_hash_entry *h, 4226 struct bfd_link_info *info) 4227 { 4228 struct elf_link_hash_entry *sh; 4229 size_t len1, len2, len3; 4230 char *name; 4231 const char *stub; 4232 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 4233 4234 if (info->shared || info->pie) 4235 stub = ".plt_pic32."; 4236 else 4237 stub = ".plt_call32."; 4238 4239 len1 = strlen (h->root.root.string); 4240 len2 = strlen (stub); 4241 len3 = 0; 4242 if (ent->sec) 4243 len3 = strlen (ent->sec->name); 4244 name = bfd_malloc (len1 + len2 + len3 + 9); 4245 if (name == NULL) 4246 return FALSE; 4247 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff); 4248 if (ent->sec) 4249 memcpy (name + 8, ent->sec->name, len3); 4250 memcpy (name + 8 + len3, stub, len2); 4251 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1); 4252 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE); 4253 if (sh == NULL) 4254 return FALSE; 4255 if (sh->root.type == bfd_link_hash_new) 4256 { 4257 sh->root.type = bfd_link_hash_defined; 4258 sh->root.u.def.section = htab->glink; 4259 sh->root.u.def.value = ent->glink_offset; 4260 sh->ref_regular = 1; 4261 sh->def_regular = 1; 4262 sh->ref_regular_nonweak = 1; 4263 sh->forced_local = 1; 4264 sh->non_elf = 0; 4265 } 4266 return TRUE; 4267 } 4268 4269 /* Allocate NEED contiguous space in .got, and return the offset. 4270 Handles allocation of the got header when crossing 32k. */ 4271 4272 static bfd_vma 4273 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need) 4274 { 4275 bfd_vma where; 4276 unsigned int max_before_header; 4277 4278 if (htab->plt_type == PLT_VXWORKS) 4279 { 4280 where = htab->got->size; 4281 htab->got->size += need; 4282 } 4283 else 4284 { 4285 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764; 4286 if (need <= htab->got_gap) 4287 { 4288 where = max_before_header - htab->got_gap; 4289 htab->got_gap -= need; 4290 } 4291 else 4292 { 4293 if (htab->got->size + need > max_before_header 4294 && htab->got->size <= max_before_header) 4295 { 4296 htab->got_gap = max_before_header - htab->got->size; 4297 htab->got->size = max_before_header + htab->got_header_size; 4298 } 4299 where = htab->got->size; 4300 htab->got->size += need; 4301 } 4302 } 4303 return where; 4304 } 4305 4306 /* Allocate space in associated reloc sections for dynamic relocs. */ 4307 4308 static bfd_boolean 4309 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) 4310 { 4311 struct bfd_link_info *info = inf; 4312 struct ppc_elf_link_hash_entry *eh; 4313 struct ppc_elf_link_hash_table *htab; 4314 struct ppc_elf_dyn_relocs *p; 4315 4316 if (h->root.type == bfd_link_hash_indirect) 4317 return TRUE; 4318 4319 if (h->root.type == bfd_link_hash_warning) 4320 /* When warning symbols are created, they **replace** the "real" 4321 entry in the hash table, thus we never get to see the real 4322 symbol in a hash traversal. So look at it now. */ 4323 h = (struct elf_link_hash_entry *) h->root.u.i.link; 4324 4325 htab = ppc_elf_hash_table (info); 4326 if (htab->elf.dynamic_sections_created) 4327 { 4328 struct plt_entry *ent; 4329 bfd_boolean doneone = FALSE; 4330 bfd_vma plt_offset = 0, glink_offset = 0; 4331 4332 for (ent = h->plt.plist; ent != NULL; ent = ent->next) 4333 if (ent->plt.refcount > 0) 4334 { 4335 /* Make sure this symbol is output as a dynamic symbol. */ 4336 if (h->dynindx == -1 4337 && !h->forced_local) 4338 { 4339 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 4340 return FALSE; 4341 } 4342 4343 if (info->shared 4344 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) 4345 { 4346 asection *s = htab->plt; 4347 4348 if (htab->plt_type == PLT_NEW) 4349 { 4350 if (!doneone) 4351 { 4352 plt_offset = s->size; 4353 s->size += 4; 4354 } 4355 ent->plt.offset = plt_offset; 4356 4357 s = htab->glink; 4358 if (!doneone || info->shared || info->pie) 4359 { 4360 glink_offset = s->size; 4361 s->size += GLINK_ENTRY_SIZE; 4362 } 4363 if (!doneone 4364 && !info->shared 4365 && !h->def_regular) 4366 { 4367 h->root.u.def.section = s; 4368 h->root.u.def.value = glink_offset; 4369 } 4370 ent->glink_offset = glink_offset; 4371 4372 if (htab->emit_stub_syms 4373 && !add_stub_sym (ent, h, info)) 4374 return FALSE; 4375 } 4376 else 4377 { 4378 if (!doneone) 4379 { 4380 /* If this is the first .plt entry, make room 4381 for the special first entry. */ 4382 if (s->size == 0) 4383 s->size += htab->plt_initial_entry_size; 4384 4385 /* The PowerPC PLT is actually composed of two 4386 parts, the first part is 2 words (for a load 4387 and a jump), and then there is a remaining 4388 word available at the end. */ 4389 plt_offset = (htab->plt_initial_entry_size 4390 + (htab->plt_slot_size 4391 * ((s->size 4392 - htab->plt_initial_entry_size) 4393 / htab->plt_entry_size))); 4394 4395 /* If this symbol is not defined in a regular 4396 file, and we are not generating a shared 4397 library, then set the symbol to this location 4398 in the .plt. This is required to make 4399 function pointers compare as equal between 4400 the normal executable and the shared library. */ 4401 if (! info->shared 4402 && !h->def_regular) 4403 { 4404 h->root.u.def.section = s; 4405 h->root.u.def.value = plt_offset; 4406 } 4407 4408 /* Make room for this entry. */ 4409 s->size += htab->plt_entry_size; 4410 /* After the 8192nd entry, room for two entries 4411 is allocated. */ 4412 if (htab->plt_type == PLT_OLD 4413 && (s->size - htab->plt_initial_entry_size) 4414 / htab->plt_entry_size 4415 > PLT_NUM_SINGLE_ENTRIES) 4416 s->size += htab->plt_entry_size; 4417 } 4418 ent->plt.offset = plt_offset; 4419 } 4420 4421 /* We also need to make an entry in the .rela.plt section. */ 4422 if (!doneone) 4423 { 4424 htab->relplt->size += sizeof (Elf32_External_Rela); 4425 4426 if (htab->plt_type == PLT_VXWORKS) 4427 { 4428 /* Allocate space for the unloaded relocations. */ 4429 if (!info->shared) 4430 { 4431 if (ent->plt.offset 4432 == (bfd_vma) htab->plt_initial_entry_size) 4433 { 4434 htab->srelplt2->size 4435 += sizeof (Elf32_External_Rela) 4436 * VXWORKS_PLTRESOLVE_RELOCS; 4437 } 4438 4439 htab->srelplt2->size 4440 += sizeof (Elf32_External_Rela) 4441 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS; 4442 } 4443 4444 /* Every PLT entry has an associated GOT entry in 4445 .got.plt. */ 4446 htab->sgotplt->size += 4; 4447 } 4448 doneone = TRUE; 4449 } 4450 } 4451 else 4452 ent->plt.offset = (bfd_vma) -1; 4453 4454 if (!doneone) 4455 { 4456 h->plt.plist = NULL; 4457 h->needs_plt = 0; 4458 } 4459 } 4460 } 4461 else 4462 { 4463 h->plt.plist = NULL; 4464 h->needs_plt = 0; 4465 } 4466 4467 eh = (struct ppc_elf_link_hash_entry *) h; 4468 if (eh->elf.got.refcount > 0) 4469 { 4470 /* Make sure this symbol is output as a dynamic symbol. */ 4471 if (eh->elf.dynindx == -1 4472 && !eh->elf.forced_local) 4473 { 4474 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf)) 4475 return FALSE; 4476 } 4477 4478 if (eh->tls_mask == (TLS_TLS | TLS_LD) 4479 && !eh->elf.def_dynamic) 4480 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */ 4481 eh->elf.got.offset = (bfd_vma) -1; 4482 else 4483 { 4484 bfd_boolean dyn; 4485 unsigned int need = 0; 4486 if ((eh->tls_mask & TLS_TLS) != 0) 4487 { 4488 if ((eh->tls_mask & TLS_LD) != 0) 4489 need += 8; 4490 if ((eh->tls_mask & TLS_GD) != 0) 4491 need += 8; 4492 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0) 4493 need += 4; 4494 if ((eh->tls_mask & TLS_DTPREL) != 0) 4495 need += 4; 4496 } 4497 else 4498 need += 4; 4499 eh->elf.got.offset = allocate_got (htab, need); 4500 dyn = htab->elf.dynamic_sections_created; 4501 if ((info->shared 4502 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf)) 4503 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT 4504 || eh->elf.root.type != bfd_link_hash_undefweak)) 4505 { 4506 /* All the entries we allocated need relocs. 4507 Except LD only needs one. */ 4508 if ((eh->tls_mask & TLS_LD) != 0) 4509 need -= 4; 4510 htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4); 4511 } 4512 } 4513 } 4514 else 4515 eh->elf.got.offset = (bfd_vma) -1; 4516 4517 if (eh->dyn_relocs == NULL) 4518 return TRUE; 4519 4520 /* In the shared -Bsymbolic case, discard space allocated for 4521 dynamic pc-relative relocs against symbols which turn out to be 4522 defined in regular objects. For the normal shared case, discard 4523 space for relocs that have become local due to symbol visibility 4524 changes. */ 4525 4526 if (info->shared) 4527 { 4528 /* Relocs that use pc_count are those that appear on a call insn, 4529 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be 4530 generated via assembly. We want calls to protected symbols to 4531 resolve directly to the function rather than going via the plt. 4532 If people want function pointer comparisons to work as expected 4533 then they should avoid writing weird assembly. */ 4534 if (SYMBOL_CALLS_LOCAL (info, h)) 4535 { 4536 struct ppc_elf_dyn_relocs **pp; 4537 4538 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) 4539 { 4540 p->count -= p->pc_count; 4541 p->pc_count = 0; 4542 if (p->count == 0) 4543 *pp = p->next; 4544 else 4545 pp = &p->next; 4546 } 4547 } 4548 4549 /* Also discard relocs on undefined weak syms with non-default 4550 visibility. */ 4551 if (eh->dyn_relocs != NULL 4552 && h->root.type == bfd_link_hash_undefweak) 4553 { 4554 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 4555 eh->dyn_relocs = NULL; 4556 4557 /* Make sure undefined weak symbols are output as a dynamic 4558 symbol in PIEs. */ 4559 else if (h->dynindx == -1 4560 && !h->forced_local) 4561 { 4562 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 4563 return FALSE; 4564 } 4565 } 4566 } 4567 else if (ELIMINATE_COPY_RELOCS) 4568 { 4569 /* For the non-shared case, discard space for relocs against 4570 symbols which turn out to need copy relocs or are not 4571 dynamic. */ 4572 4573 if (!h->non_got_ref 4574 && h->def_dynamic 4575 && !h->def_regular) 4576 { 4577 /* Make sure this symbol is output as a dynamic symbol. 4578 Undefined weak syms won't yet be marked as dynamic. */ 4579 if (h->dynindx == -1 4580 && !h->forced_local) 4581 { 4582 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 4583 return FALSE; 4584 } 4585 4586 /* If that succeeded, we know we'll be keeping all the 4587 relocs. */ 4588 if (h->dynindx != -1) 4589 goto keep; 4590 } 4591 4592 eh->dyn_relocs = NULL; 4593 4594 keep: ; 4595 } 4596 4597 /* Finally, allocate space. */ 4598 for (p = eh->dyn_relocs; p != NULL; p = p->next) 4599 { 4600 asection *sreloc = elf_section_data (p->sec)->sreloc; 4601 sreloc->size += p->count * sizeof (Elf32_External_Rela); 4602 } 4603 4604 return TRUE; 4605 } 4606 4607 /* Find any dynamic relocs that apply to read-only sections. */ 4608 4609 static bfd_boolean 4610 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info) 4611 { 4612 struct ppc_elf_dyn_relocs *p; 4613 4614 if (h->root.type == bfd_link_hash_indirect) 4615 return TRUE; 4616 4617 if (h->root.type == bfd_link_hash_warning) 4618 h = (struct elf_link_hash_entry *) h->root.u.i.link; 4619 4620 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next) 4621 { 4622 asection *s = p->sec->output_section; 4623 4624 if (s != NULL 4625 && ((s->flags & (SEC_READONLY | SEC_ALLOC)) 4626 == (SEC_READONLY | SEC_ALLOC))) 4627 { 4628 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL; 4629 4630 /* Not an error, just cut short the traversal. */ 4631 return FALSE; 4632 } 4633 } 4634 return TRUE; 4635 } 4636 4637 /* Set the sizes of the dynamic sections. */ 4638 4639 static bfd_boolean 4640 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, 4641 struct bfd_link_info *info) 4642 { 4643 struct ppc_elf_link_hash_table *htab; 4644 asection *s; 4645 bfd_boolean relocs; 4646 bfd *ibfd; 4647 4648 #ifdef DEBUG 4649 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n"); 4650 #endif 4651 4652 htab = ppc_elf_hash_table (info); 4653 BFD_ASSERT (htab->elf.dynobj != NULL); 4654 4655 if (elf_hash_table (info)->dynamic_sections_created) 4656 { 4657 /* Set the contents of the .interp section to the interpreter. */ 4658 if (info->executable && !info->static_link) 4659 { 4660 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp"); 4661 BFD_ASSERT (s != NULL); 4662 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 4663 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 4664 } 4665 } 4666 4667 if (htab->plt_type == PLT_OLD) 4668 htab->got_header_size = 16; 4669 else if (htab->plt_type == PLT_NEW) 4670 htab->got_header_size = 12; 4671 4672 /* Set up .got offsets for local syms, and space for local dynamic 4673 relocs. */ 4674 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) 4675 { 4676 bfd_signed_vma *local_got; 4677 bfd_signed_vma *end_local_got; 4678 char *lgot_masks; 4679 bfd_size_type locsymcount; 4680 Elf_Internal_Shdr *symtab_hdr; 4681 4682 if (!is_ppc_elf_target (ibfd->xvec)) 4683 continue; 4684 4685 for (s = ibfd->sections; s != NULL; s = s->next) 4686 { 4687 struct ppc_elf_dyn_relocs *p; 4688 4689 for (p = ((struct ppc_elf_dyn_relocs *) 4690 elf_section_data (s)->local_dynrel); 4691 p != NULL; 4692 p = p->next) 4693 { 4694 if (!bfd_is_abs_section (p->sec) 4695 && bfd_is_abs_section (p->sec->output_section)) 4696 { 4697 /* Input section has been discarded, either because 4698 it is a copy of a linkonce section or due to 4699 linker script /DISCARD/, so we'll be discarding 4700 the relocs too. */ 4701 } 4702 else if (p->count != 0) 4703 { 4704 elf_section_data (p->sec)->sreloc->size 4705 += p->count * sizeof (Elf32_External_Rela); 4706 if ((p->sec->output_section->flags 4707 & (SEC_READONLY | SEC_ALLOC)) 4708 == (SEC_READONLY | SEC_ALLOC)) 4709 info->flags |= DF_TEXTREL; 4710 } 4711 } 4712 } 4713 4714 local_got = elf_local_got_refcounts (ibfd); 4715 if (!local_got) 4716 continue; 4717 4718 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 4719 locsymcount = symtab_hdr->sh_info; 4720 end_local_got = local_got + locsymcount; 4721 lgot_masks = (char *) end_local_got; 4722 for (; local_got < end_local_got; ++local_got, ++lgot_masks) 4723 if (*local_got > 0) 4724 { 4725 if (*lgot_masks == (TLS_TLS | TLS_LD)) 4726 { 4727 /* If just an LD reloc, we'll just use 4728 htab->tlsld_got.offset. */ 4729 htab->tlsld_got.refcount += 1; 4730 *local_got = (bfd_vma) -1; 4731 } 4732 else 4733 { 4734 unsigned int need = 0; 4735 if ((*lgot_masks & TLS_TLS) != 0) 4736 { 4737 if ((*lgot_masks & TLS_GD) != 0) 4738 need += 8; 4739 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0) 4740 need += 4; 4741 if ((*lgot_masks & TLS_DTPREL) != 0) 4742 need += 4; 4743 } 4744 else 4745 need += 4; 4746 *local_got = allocate_got (htab, need); 4747 if (info->shared) 4748 htab->relgot->size += (need 4749 * (sizeof (Elf32_External_Rela) / 4)); 4750 } 4751 } 4752 else 4753 *local_got = (bfd_vma) -1; 4754 } 4755 4756 if (htab->tlsld_got.refcount > 0) 4757 { 4758 htab->tlsld_got.offset = allocate_got (htab, 8); 4759 if (info->shared) 4760 htab->relgot->size += sizeof (Elf32_External_Rela); 4761 } 4762 else 4763 htab->tlsld_got.offset = (bfd_vma) -1; 4764 4765 /* Allocate space for global sym dynamic relocs. */ 4766 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info); 4767 4768 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS) 4769 { 4770 unsigned int g_o_t = 32768; 4771 4772 /* If we haven't allocated the header, do so now. When we get here, 4773 for old plt/got the got size will be 0 to 32764 (not allocated), 4774 or 32780 to 65536 (header allocated). For new plt/got, the 4775 corresponding ranges are 0 to 32768 and 32780 to 65536. */ 4776 if (htab->got->size <= 32768) 4777 { 4778 g_o_t = htab->got->size; 4779 if (htab->plt_type == PLT_OLD) 4780 g_o_t += 4; 4781 htab->got->size += htab->got_header_size; 4782 } 4783 4784 htab->elf.hgot->root.u.def.value = g_o_t; 4785 } 4786 4787 if (htab->glink != NULL && htab->glink->size != 0) 4788 { 4789 htab->glink_pltresolve = htab->glink->size; 4790 /* Space for the branch table. */ 4791 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4; 4792 /* Pad out to align the start of PLTresolve. */ 4793 htab->glink->size += -htab->glink->size & 15; 4794 htab->glink->size += GLINK_PLTRESOLVE; 4795 4796 if (htab->emit_stub_syms) 4797 { 4798 struct elf_link_hash_entry *sh; 4799 sh = elf_link_hash_lookup (&htab->elf, "__glink", 4800 TRUE, FALSE, FALSE); 4801 if (sh == NULL) 4802 return FALSE; 4803 if (sh->root.type == bfd_link_hash_new) 4804 { 4805 sh->root.type = bfd_link_hash_defined; 4806 sh->root.u.def.section = htab->glink; 4807 sh->root.u.def.value = htab->glink_pltresolve; 4808 sh->ref_regular = 1; 4809 sh->def_regular = 1; 4810 sh->ref_regular_nonweak = 1; 4811 sh->forced_local = 1; 4812 sh->non_elf = 0; 4813 } 4814 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve", 4815 TRUE, FALSE, FALSE); 4816 if (sh == NULL) 4817 return FALSE; 4818 if (sh->root.type == bfd_link_hash_new) 4819 { 4820 sh->root.type = bfd_link_hash_defined; 4821 sh->root.u.def.section = htab->glink; 4822 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE; 4823 sh->ref_regular = 1; 4824 sh->def_regular = 1; 4825 sh->ref_regular_nonweak = 1; 4826 sh->forced_local = 1; 4827 sh->non_elf = 0; 4828 } 4829 } 4830 } 4831 4832 /* We've now determined the sizes of the various dynamic sections. 4833 Allocate memory for them. */ 4834 relocs = FALSE; 4835 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next) 4836 { 4837 bfd_boolean strip_section = TRUE; 4838 4839 if ((s->flags & SEC_LINKER_CREATED) == 0) 4840 continue; 4841 4842 if (s == htab->plt 4843 || s == htab->glink 4844 || s == htab->got 4845 || s == htab->sgotplt 4846 || s == htab->sbss 4847 || s == htab->dynbss 4848 || s == htab->dynsbss) 4849 { 4850 /* We'd like to strip these sections if they aren't needed, but if 4851 we've exported dynamic symbols from them we must leave them. 4852 It's too late to tell BFD to get rid of the symbols. */ 4853 if ((s == htab->plt || s == htab->got) && htab->elf.hplt != NULL) 4854 strip_section = FALSE; 4855 /* Strip this section if we don't need it; see the 4856 comment below. */ 4857 } 4858 else if (s == htab->sdata[0].section 4859 || s == htab->sdata[1].section) 4860 { 4861 /* Strip these too. */ 4862 } 4863 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0) 4864 { 4865 if (s->size != 0) 4866 { 4867 /* Remember whether there are any relocation sections. */ 4868 relocs = TRUE; 4869 4870 /* We use the reloc_count field as a counter if we need 4871 to copy relocs into the output file. */ 4872 s->reloc_count = 0; 4873 } 4874 } 4875 else 4876 { 4877 /* It's not one of our sections, so don't allocate space. */ 4878 continue; 4879 } 4880 4881 if (s->size == 0 && strip_section) 4882 { 4883 /* If we don't need this section, strip it from the 4884 output file. This is mostly to handle .rela.bss and 4885 .rela.plt. We must create both sections in 4886 create_dynamic_sections, because they must be created 4887 before the linker maps input sections to output 4888 sections. The linker does that before 4889 adjust_dynamic_symbol is called, and it is that 4890 function which decides whether anything needs to go 4891 into these sections. */ 4892 s->flags |= SEC_EXCLUDE; 4893 continue; 4894 } 4895 4896 if ((s->flags & SEC_HAS_CONTENTS) == 0) 4897 continue; 4898 4899 /* Allocate memory for the section contents. */ 4900 s->contents = bfd_zalloc (htab->elf.dynobj, s->size); 4901 if (s->contents == NULL) 4902 return FALSE; 4903 } 4904 4905 if (htab->elf.dynamic_sections_created) 4906 { 4907 /* Add some entries to the .dynamic section. We fill in the 4908 values later, in ppc_elf_finish_dynamic_sections, but we 4909 must add the entries now so that we get the correct size for 4910 the .dynamic section. The DT_DEBUG entry is filled in by the 4911 dynamic linker and used by the debugger. */ 4912 #define add_dynamic_entry(TAG, VAL) \ 4913 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 4914 4915 if (info->executable) 4916 { 4917 if (!add_dynamic_entry (DT_DEBUG, 0)) 4918 return FALSE; 4919 } 4920 4921 if (htab->plt != NULL && htab->plt->size != 0) 4922 { 4923 if (!add_dynamic_entry (DT_PLTGOT, 0) 4924 || !add_dynamic_entry (DT_PLTRELSZ, 0) 4925 || !add_dynamic_entry (DT_PLTREL, DT_RELA) 4926 || !add_dynamic_entry (DT_JMPREL, 0)) 4927 return FALSE; 4928 } 4929 4930 if (htab->glink != NULL && htab->glink->size != 0) 4931 { 4932 if (!add_dynamic_entry (DT_PPC_GOT, 0)) 4933 return FALSE; 4934 } 4935 4936 if (relocs) 4937 { 4938 if (!add_dynamic_entry (DT_RELA, 0) 4939 || !add_dynamic_entry (DT_RELASZ, 0) 4940 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) 4941 return FALSE; 4942 } 4943 4944 /* If any dynamic relocs apply to a read-only section, then we 4945 need a DT_TEXTREL entry. */ 4946 if ((info->flags & DF_TEXTREL) == 0) 4947 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs, 4948 info); 4949 4950 if ((info->flags & DF_TEXTREL) != 0) 4951 { 4952 if (!add_dynamic_entry (DT_TEXTREL, 0)) 4953 return FALSE; 4954 } 4955 } 4956 #undef add_dynamic_entry 4957 4958 return TRUE; 4959 } 4960 4961 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0])) 4962 4963 static const int shared_stub_entry[] = 4964 { 4965 0x7c0802a6, /* mflr 0 */ 4966 0x429f0005, /* bcl 20, 31, .Lxxx */ 4967 0x7d6802a6, /* mflr 11 */ 4968 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */ 4969 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */ 4970 0x7c0803a6, /* mtlr 0 */ 4971 0x7d6903a6, /* mtctr 11 */ 4972 0x4e800420, /* bctr */ 4973 }; 4974 4975 static const int stub_entry[] = 4976 { 4977 0x3d600000, /* lis 11,xxx@ha */ 4978 0x396b0000, /* addi 11,11,xxx@l */ 4979 0x7d6903a6, /* mtctr 11 */ 4980 0x4e800420, /* bctr */ 4981 }; 4982 4983 static bfd_boolean 4984 ppc_elf_relax_section (bfd *abfd, 4985 asection *isec, 4986 struct bfd_link_info *link_info, 4987 bfd_boolean *again) 4988 { 4989 struct one_fixup 4990 { 4991 struct one_fixup *next; 4992 asection *tsec; 4993 bfd_vma toff; 4994 bfd_vma trampoff; 4995 }; 4996 4997 Elf_Internal_Shdr *symtab_hdr; 4998 bfd_byte *contents = NULL; 4999 Elf_Internal_Sym *isymbuf = NULL; 5000 Elf_Internal_Rela *internal_relocs = NULL; 5001 Elf_Internal_Rela *irel, *irelend; 5002 struct one_fixup *fixups = NULL; 5003 bfd_boolean changed; 5004 struct ppc_elf_link_hash_table *htab; 5005 bfd_size_type trampoff; 5006 asection *got2; 5007 5008 *again = FALSE; 5009 5010 /* Nothing to do if there are no relocations, and no need to do 5011 anything with non-alloc sections. */ 5012 if ((isec->flags & SEC_ALLOC) == 0 5013 || (isec->flags & SEC_RELOC) == 0 5014 || isec->reloc_count == 0) 5015 return TRUE; 5016 5017 trampoff = (isec->size + 3) & (bfd_vma) -4; 5018 /* Space for a branch around any trampolines. */ 5019 trampoff += 4; 5020 5021 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 5022 5023 /* Get a copy of the native relocations. */ 5024 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL, 5025 link_info->keep_memory); 5026 if (internal_relocs == NULL) 5027 goto error_return; 5028 5029 htab = ppc_elf_hash_table (link_info); 5030 got2 = bfd_get_section_by_name (abfd, ".got2"); 5031 5032 irelend = internal_relocs + isec->reloc_count; 5033 for (irel = internal_relocs; irel < irelend; irel++) 5034 { 5035 unsigned long r_type = ELF32_R_TYPE (irel->r_info); 5036 bfd_vma symaddr, reladdr, toff, roff; 5037 asection *tsec; 5038 struct one_fixup *f; 5039 size_t insn_offset = 0; 5040 bfd_vma max_branch_offset, val; 5041 bfd_byte *hit_addr; 5042 unsigned long t0; 5043 unsigned char sym_type; 5044 5045 switch (r_type) 5046 { 5047 case R_PPC_REL24: 5048 case R_PPC_LOCAL24PC: 5049 case R_PPC_PLTREL24: 5050 max_branch_offset = 1 << 25; 5051 break; 5052 5053 case R_PPC_REL14: 5054 case R_PPC_REL14_BRTAKEN: 5055 case R_PPC_REL14_BRNTAKEN: 5056 max_branch_offset = 1 << 15; 5057 break; 5058 5059 default: 5060 continue; 5061 } 5062 5063 /* Get the value of the symbol referred to by the reloc. */ 5064 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) 5065 { 5066 /* A local symbol. */ 5067 Elf_Internal_Sym *isym; 5068 5069 /* Read this BFD's local symbols. */ 5070 if (isymbuf == NULL) 5071 { 5072 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; 5073 if (isymbuf == NULL) 5074 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, 5075 symtab_hdr->sh_info, 0, 5076 NULL, NULL, NULL); 5077 if (isymbuf == 0) 5078 goto error_return; 5079 } 5080 isym = isymbuf + ELF32_R_SYM (irel->r_info); 5081 if (isym->st_shndx == SHN_UNDEF) 5082 continue; /* We can't do anything with undefined symbols. */ 5083 else if (isym->st_shndx == SHN_ABS) 5084 tsec = bfd_abs_section_ptr; 5085 else if (isym->st_shndx == SHN_COMMON) 5086 tsec = bfd_com_section_ptr; 5087 else 5088 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); 5089 5090 toff = isym->st_value; 5091 sym_type = ELF_ST_TYPE (isym->st_info); 5092 } 5093 else 5094 { 5095 /* Global symbol handling. */ 5096 unsigned long indx; 5097 struct elf_link_hash_entry *h; 5098 5099 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; 5100 h = elf_sym_hashes (abfd)[indx]; 5101 5102 while (h->root.type == bfd_link_hash_indirect 5103 || h->root.type == bfd_link_hash_warning) 5104 h = (struct elf_link_hash_entry *) h->root.u.i.link; 5105 5106 tsec = NULL; 5107 toff = 0; 5108 if (r_type == R_PPC_PLTREL24 5109 && htab->plt != NULL) 5110 { 5111 struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend); 5112 5113 if (ent != NULL) 5114 { 5115 if (htab->plt_type == PLT_NEW) 5116 { 5117 tsec = htab->glink; 5118 toff = ent->glink_offset; 5119 } 5120 else 5121 { 5122 tsec = htab->plt; 5123 toff = ent->plt.offset; 5124 } 5125 } 5126 } 5127 if (tsec != NULL) 5128 ; 5129 else if (h->root.type == bfd_link_hash_defined 5130 || h->root.type == bfd_link_hash_defweak) 5131 { 5132 tsec = h->root.u.def.section; 5133 toff = h->root.u.def.value; 5134 } 5135 else 5136 continue; 5137 5138 sym_type = h->type; 5139 } 5140 5141 /* If the branch and target are in the same section, you have 5142 no hope of adding stubs. We'll error out later should the 5143 branch overflow. */ 5144 if (tsec == isec) 5145 continue; 5146 5147 /* There probably isn't any reason to handle symbols in 5148 SEC_MERGE sections; SEC_MERGE doesn't seem a likely 5149 attribute for a code section, and we are only looking at 5150 branches. However, implement it correctly here as a 5151 reference for other target relax_section functions. */ 5152 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE) 5153 { 5154 /* At this stage in linking, no SEC_MERGE symbol has been 5155 adjusted, so all references to such symbols need to be 5156 passed through _bfd_merged_section_offset. (Later, in 5157 relocate_section, all SEC_MERGE symbols *except* for 5158 section symbols have been adjusted.) 5159 5160 gas may reduce relocations against symbols in SEC_MERGE 5161 sections to a relocation against the section symbol when 5162 the original addend was zero. When the reloc is against 5163 a section symbol we should include the addend in the 5164 offset passed to _bfd_merged_section_offset, since the 5165 location of interest is the original symbol. On the 5166 other hand, an access to "sym+addend" where "sym" is not 5167 a section symbol should not include the addend; Such an 5168 access is presumed to be an offset from "sym"; The 5169 location of interest is just "sym". */ 5170 if (sym_type == STT_SECTION) 5171 toff += irel->r_addend; 5172 5173 toff = _bfd_merged_section_offset (abfd, &tsec, 5174 elf_section_data (tsec)->sec_info, 5175 toff); 5176 5177 if (sym_type != STT_SECTION) 5178 toff += irel->r_addend; 5179 } 5180 /* PLTREL24 addends are special. */ 5181 else if (r_type != R_PPC_PLTREL24) 5182 toff += irel->r_addend; 5183 5184 /* Attempted -shared link of non-pic code loses. */ 5185 if (tsec->output_section == NULL) 5186 continue; 5187 5188 symaddr = tsec->output_section->vma + tsec->output_offset + toff; 5189 5190 roff = irel->r_offset; 5191 reladdr = isec->output_section->vma + isec->output_offset + roff; 5192 5193 /* If the branch is in range, no need to do anything. */ 5194 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset) 5195 continue; 5196 5197 /* Look for an existing fixup to this address. */ 5198 for (f = fixups; f ; f = f->next) 5199 if (f->tsec == tsec && f->toff == toff) 5200 break; 5201 5202 if (f == NULL) 5203 { 5204 size_t size; 5205 unsigned long stub_rtype; 5206 5207 val = trampoff - roff; 5208 if (val >= max_branch_offset) 5209 /* Oh dear, we can't reach a trampoline. Don't try to add 5210 one. We'll report an error later. */ 5211 continue; 5212 5213 if (link_info->shared) 5214 { 5215 size = 4 * ARRAY_SIZE (shared_stub_entry); 5216 insn_offset = 12; 5217 stub_rtype = R_PPC_RELAX32PC; 5218 } 5219 else 5220 { 5221 size = 4 * ARRAY_SIZE (stub_entry); 5222 insn_offset = 0; 5223 stub_rtype = R_PPC_RELAX32; 5224 } 5225 5226 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32 5227 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC) 5228 abort (); 5229 if (tsec == htab->plt 5230 || tsec == htab->glink) 5231 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32; 5232 5233 /* Hijack the old relocation. Since we need two 5234 relocations for this use a "composite" reloc. */ 5235 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 5236 stub_rtype); 5237 irel->r_offset = trampoff + insn_offset; 5238 5239 /* Record the fixup so we don't do it again this section. */ 5240 f = bfd_malloc (sizeof (*f)); 5241 f->next = fixups; 5242 f->tsec = tsec; 5243 f->toff = toff; 5244 f->trampoff = trampoff; 5245 fixups = f; 5246 5247 trampoff += size; 5248 } 5249 else 5250 { 5251 val = f->trampoff - roff; 5252 if (val >= max_branch_offset) 5253 continue; 5254 5255 /* Nop out the reloc, since we're finalizing things here. */ 5256 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE); 5257 } 5258 5259 /* Get the section contents. */ 5260 if (contents == NULL) 5261 { 5262 /* Get cached copy if it exists. */ 5263 if (elf_section_data (isec)->this_hdr.contents != NULL) 5264 contents = elf_section_data (isec)->this_hdr.contents; 5265 else 5266 { 5267 /* Go get them off disk. */ 5268 if (!bfd_malloc_and_get_section (abfd, isec, &contents)) 5269 goto error_return; 5270 } 5271 } 5272 5273 /* Fix up the existing branch to hit the trampoline. */ 5274 hit_addr = contents + roff; 5275 switch (r_type) 5276 { 5277 case R_PPC_REL24: 5278 case R_PPC_LOCAL24PC: 5279 case R_PPC_PLTREL24: 5280 t0 = bfd_get_32 (abfd, hit_addr); 5281 t0 &= ~0x3fffffc; 5282 t0 |= val & 0x3fffffc; 5283 bfd_put_32 (abfd, t0, hit_addr); 5284 break; 5285 5286 case R_PPC_REL14: 5287 case R_PPC_REL14_BRTAKEN: 5288 case R_PPC_REL14_BRNTAKEN: 5289 t0 = bfd_get_32 (abfd, hit_addr); 5290 t0 &= ~0xfffc; 5291 t0 |= val & 0xfffc; 5292 bfd_put_32 (abfd, t0, hit_addr); 5293 break; 5294 } 5295 } 5296 5297 /* Write out the trampolines. */ 5298 changed = fixups != NULL; 5299 if (fixups != NULL) 5300 { 5301 const int *stub; 5302 bfd_byte *dest; 5303 bfd_vma val; 5304 int i, size; 5305 5306 do 5307 { 5308 struct one_fixup *f = fixups; 5309 fixups = fixups->next; 5310 free (f); 5311 } 5312 while (fixups); 5313 5314 contents = bfd_realloc (contents, trampoff); 5315 if (contents == NULL) 5316 goto error_return; 5317 5318 isec->size = (isec->size + 3) & (bfd_vma) -4; 5319 /* Branch around the trampolines. */ 5320 val = trampoff - isec->size + 0x48000000; 5321 dest = contents + isec->size; 5322 isec->size = trampoff; 5323 bfd_put_32 (abfd, val, dest); 5324 dest += 4; 5325 5326 if (link_info->shared) 5327 { 5328 stub = shared_stub_entry; 5329 size = ARRAY_SIZE (shared_stub_entry); 5330 } 5331 else 5332 { 5333 stub = stub_entry; 5334 size = ARRAY_SIZE (stub_entry); 5335 } 5336 5337 i = 0; 5338 while (dest < contents + trampoff) 5339 { 5340 bfd_put_32 (abfd, stub[i], dest); 5341 i++; 5342 if (i == size) 5343 i = 0; 5344 dest += 4; 5345 } 5346 BFD_ASSERT (i == 0); 5347 } 5348 5349 if (isymbuf != NULL 5350 && symtab_hdr->contents != (unsigned char *) isymbuf) 5351 { 5352 if (! link_info->keep_memory) 5353 free (isymbuf); 5354 else 5355 { 5356 /* Cache the symbols for elf_link_input_bfd. */ 5357 symtab_hdr->contents = (unsigned char *) isymbuf; 5358 } 5359 } 5360 5361 if (contents != NULL 5362 && elf_section_data (isec)->this_hdr.contents != contents) 5363 { 5364 if (!changed && !link_info->keep_memory) 5365 free (contents); 5366 else 5367 { 5368 /* Cache the section contents for elf_link_input_bfd. */ 5369 elf_section_data (isec)->this_hdr.contents = contents; 5370 } 5371 } 5372 5373 if (elf_section_data (isec)->relocs != internal_relocs) 5374 { 5375 if (!changed) 5376 free (internal_relocs); 5377 else 5378 elf_section_data (isec)->relocs = internal_relocs; 5379 } 5380 5381 *again = changed; 5382 return TRUE; 5383 5384 error_return: 5385 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents) 5386 free (isymbuf); 5387 if (contents != NULL 5388 && elf_section_data (isec)->this_hdr.contents != contents) 5389 free (contents); 5390 if (internal_relocs != NULL 5391 && elf_section_data (isec)->relocs != internal_relocs) 5392 free (internal_relocs); 5393 return FALSE; 5394 } 5395 5396 /* What to do when ld finds relocations against symbols defined in 5397 discarded sections. */ 5398 5399 static unsigned int 5400 ppc_elf_action_discarded (asection *sec) 5401 { 5402 if (strcmp (".fixup", sec->name) == 0) 5403 return 0; 5404 5405 if (strcmp (".got2", sec->name) == 0) 5406 return 0; 5407 5408 return _bfd_elf_default_action_discarded (sec); 5409 } 5410 5411 /* Fill in the address for a pointer generated in a linker section. */ 5412 5413 static bfd_vma 5414 elf_finish_pointer_linker_section (bfd *input_bfd, 5415 elf_linker_section_t *lsect, 5416 struct elf_link_hash_entry *h, 5417 bfd_vma relocation, 5418 const Elf_Internal_Rela *rel) 5419 { 5420 elf_linker_section_pointers_t *linker_section_ptr; 5421 5422 BFD_ASSERT (lsect != NULL); 5423 5424 if (h != NULL) 5425 { 5426 /* Handle global symbol. */ 5427 struct ppc_elf_link_hash_entry *eh; 5428 5429 eh = (struct ppc_elf_link_hash_entry *) h; 5430 BFD_ASSERT (eh->elf.def_regular); 5431 linker_section_ptr = eh->linker_section_pointer; 5432 } 5433 else 5434 { 5435 /* Handle local symbol. */ 5436 unsigned long r_symndx = ELF32_R_SYM (rel->r_info); 5437 5438 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL); 5439 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx]; 5440 } 5441 5442 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr, 5443 rel->r_addend, 5444 lsect); 5445 BFD_ASSERT (linker_section_ptr != NULL); 5446 5447 /* Offset will always be a multiple of four, so use the bottom bit 5448 as a "written" flag. */ 5449 if ((linker_section_ptr->offset & 1) == 0) 5450 { 5451 bfd_put_32 (lsect->section->owner, 5452 relocation + linker_section_ptr->addend, 5453 lsect->section->contents + linker_section_ptr->offset); 5454 linker_section_ptr->offset += 1; 5455 } 5456 5457 relocation = (lsect->section->output_offset 5458 + linker_section_ptr->offset - 1 5459 - 0x8000); 5460 5461 #ifdef DEBUG 5462 fprintf (stderr, 5463 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n", 5464 lsect->name, (long) relocation, (long) relocation); 5465 #endif 5466 5467 /* Subtract out the addend, because it will get added back in by the normal 5468 processing. */ 5469 return relocation - linker_section_ptr->addend; 5470 } 5471 5472 /* The RELOCATE_SECTION function is called by the ELF backend linker 5473 to handle the relocations for a section. 5474 5475 The relocs are always passed as Rela structures; if the section 5476 actually uses Rel structures, the r_addend field will always be 5477 zero. 5478 5479 This function is responsible for adjust the section contents as 5480 necessary, and (if using Rela relocs and generating a 5481 relocatable output file) adjusting the reloc addend as 5482 necessary. 5483 5484 This function does not have to worry about setting the reloc 5485 address or the reloc symbol index. 5486 5487 LOCAL_SYMS is a pointer to the swapped in local symbols. 5488 5489 LOCAL_SECTIONS is an array giving the section in the input file 5490 corresponding to the st_shndx field of each local symbol. 5491 5492 The global hash table entry for the global symbols can be found 5493 via elf_sym_hashes (input_bfd). 5494 5495 When generating relocatable output, this function must handle 5496 STB_LOCAL/STT_SECTION symbols specially. The output symbol is 5497 going to be the section symbol corresponding to the output 5498 section, which means that the addend must be adjusted 5499 accordingly. */ 5500 5501 static bfd_boolean 5502 ppc_elf_relocate_section (bfd *output_bfd, 5503 struct bfd_link_info *info, 5504 bfd *input_bfd, 5505 asection *input_section, 5506 bfd_byte *contents, 5507 Elf_Internal_Rela *relocs, 5508 Elf_Internal_Sym *local_syms, 5509 asection **local_sections) 5510 { 5511 Elf_Internal_Shdr *symtab_hdr; 5512 struct elf_link_hash_entry **sym_hashes; 5513 struct ppc_elf_link_hash_table *htab; 5514 Elf_Internal_Rela *rel; 5515 Elf_Internal_Rela *relend; 5516 Elf_Internal_Rela outrel; 5517 bfd_byte *loc; 5518 asection *got2, *sreloc = NULL; 5519 bfd_vma *local_got_offsets; 5520 bfd_boolean ret = TRUE; 5521 5522 #ifdef DEBUG 5523 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, " 5524 "%ld relocations%s", 5525 input_bfd, input_section, 5526 (long) input_section->reloc_count, 5527 (info->relocatable) ? " (relocatable)" : ""); 5528 #endif 5529 5530 got2 = bfd_get_section_by_name (input_bfd, ".got2"); 5531 5532 if (info->relocatable) 5533 { 5534 if (got2 == NULL) 5535 return TRUE; 5536 5537 rel = relocs; 5538 relend = relocs + input_section->reloc_count; 5539 for (; rel < relend; rel++) 5540 { 5541 enum elf_ppc_reloc_type r_type; 5542 5543 r_type = ELF32_R_TYPE (rel->r_info); 5544 if (r_type == R_PPC_PLTREL24 5545 && rel->r_addend >= 32768) 5546 { 5547 /* R_PPC_PLTREL24 is rather special. If non-zero, the 5548 addend specifies the GOT pointer offset within .got2. */ 5549 rel->r_addend += got2->output_offset; 5550 } 5551 } 5552 return TRUE; 5553 } 5554 5555 /* Initialize howto table if not already done. */ 5556 if (!ppc_elf_howto_table[R_PPC_ADDR32]) 5557 ppc_elf_howto_init (); 5558 5559 htab = ppc_elf_hash_table (info); 5560 local_got_offsets = elf_local_got_offsets (input_bfd); 5561 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 5562 sym_hashes = elf_sym_hashes (input_bfd); 5563 rel = relocs; 5564 relend = relocs + input_section->reloc_count; 5565 for (; rel < relend; rel++) 5566 { 5567 enum elf_ppc_reloc_type r_type; 5568 bfd_vma addend; 5569 bfd_reloc_status_type r; 5570 Elf_Internal_Sym *sym; 5571 asection *sec; 5572 struct elf_link_hash_entry *h; 5573 const char *sym_name; 5574 reloc_howto_type *howto; 5575 unsigned long r_symndx; 5576 bfd_vma relocation; 5577 bfd_vma branch_bit, insn, from; 5578 bfd_boolean unresolved_reloc; 5579 bfd_boolean warned; 5580 unsigned int tls_type, tls_mask, tls_gd; 5581 5582 r_type = ELF32_R_TYPE (rel->r_info); 5583 sym = NULL; 5584 sec = NULL; 5585 h = NULL; 5586 unresolved_reloc = FALSE; 5587 warned = FALSE; 5588 r_symndx = ELF32_R_SYM (rel->r_info); 5589 5590 if (r_symndx < symtab_hdr->sh_info) 5591 { 5592 sym = local_syms + r_symndx; 5593 sec = local_sections[r_symndx]; 5594 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec); 5595 5596 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 5597 } 5598 else 5599 { 5600 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 5601 r_symndx, symtab_hdr, sym_hashes, 5602 h, sec, relocation, 5603 unresolved_reloc, warned); 5604 5605 sym_name = h->root.root.string; 5606 } 5607 5608 /* TLS optimizations. Replace instruction sequences and relocs 5609 based on information we collected in tls_optimize. We edit 5610 RELOCS so that --emit-relocs will output something sensible 5611 for the final instruction stream. */ 5612 tls_mask = 0; 5613 tls_gd = 0; 5614 if (IS_PPC_TLS_RELOC (r_type)) 5615 { 5616 if (h != NULL) 5617 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask; 5618 else if (local_got_offsets != NULL) 5619 { 5620 char *lgot_masks; 5621 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info); 5622 tls_mask = lgot_masks[r_symndx]; 5623 } 5624 } 5625 5626 /* Ensure reloc mapping code below stays sane. */ 5627 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3) 5628 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3) 5629 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3) 5630 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3) 5631 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3) 5632 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3) 5633 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3) 5634 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3)) 5635 abort (); 5636 switch (r_type) 5637 { 5638 default: 5639 break; 5640 5641 case R_PPC_GOT_TPREL16: 5642 case R_PPC_GOT_TPREL16_LO: 5643 if (tls_mask != 0 5644 && (tls_mask & TLS_TPREL) == 0) 5645 { 5646 bfd_vma insn; 5647 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2); 5648 insn &= 31 << 21; 5649 insn |= 0x3c020000; /* addis 0,2,0 */ 5650 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2); 5651 r_type = R_PPC_TPREL16_HA; 5652 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 5653 } 5654 break; 5655 5656 case R_PPC_TLS: 5657 if (tls_mask != 0 5658 && (tls_mask & TLS_TPREL) == 0) 5659 { 5660 bfd_vma insn, rtra; 5661 insn = bfd_get_32 (output_bfd, contents + rel->r_offset); 5662 if ((insn & ((31 << 26) | (31 << 11))) 5663 == ((31 << 26) | (2 << 11))) 5664 rtra = insn & ((1 << 26) - (1 << 16)); 5665 else if ((insn & ((31 << 26) | (31 << 16))) 5666 == ((31 << 26) | (2 << 16))) 5667 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5); 5668 else 5669 abort (); 5670 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1) 5671 /* add -> addi. */ 5672 insn = 14 << 26; 5673 else if ((insn & (31 << 1)) == 23 << 1 5674 && ((insn & (31 << 6)) < 14 << 6 5675 || ((insn & (31 << 6)) >= 16 << 6 5676 && (insn & (31 << 6)) < 24 << 6))) 5677 /* load and store indexed -> dform. */ 5678 insn = (32 | ((insn >> 6) & 31)) << 26; 5679 else if ((insn & (31 << 1)) == 21 << 1 5680 && (insn & (0x1a << 6)) == 0) 5681 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */ 5682 insn = (((58 | ((insn >> 6) & 4)) << 26) 5683 | ((insn >> 6) & 1)); 5684 else if ((insn & (31 << 1)) == 21 << 1 5685 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1) 5686 /* lwax -> lwa. */ 5687 insn = (58 << 26) | 2; 5688 else 5689 abort (); 5690 insn |= rtra; 5691 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 5692 r_type = R_PPC_TPREL16_LO; 5693 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 5694 /* Was PPC_TLS which sits on insn boundary, now 5695 PPC_TPREL16_LO which is at insn+2. */ 5696 rel->r_offset += 2; 5697 } 5698 break; 5699 5700 case R_PPC_GOT_TLSGD16_HI: 5701 case R_PPC_GOT_TLSGD16_HA: 5702 tls_gd = TLS_TPRELGD; 5703 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0) 5704 goto tls_gdld_hi; 5705 break; 5706 5707 case R_PPC_GOT_TLSLD16_HI: 5708 case R_PPC_GOT_TLSLD16_HA: 5709 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0) 5710 { 5711 tls_gdld_hi: 5712 if ((tls_mask & tls_gd) != 0) 5713 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3) 5714 + R_PPC_GOT_TPREL16); 5715 else 5716 { 5717 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset); 5718 rel->r_offset -= 2; 5719 r_type = R_PPC_NONE; 5720 } 5721 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 5722 } 5723 break; 5724 5725 case R_PPC_GOT_TLSGD16: 5726 case R_PPC_GOT_TLSGD16_LO: 5727 tls_gd = TLS_TPRELGD; 5728 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0) 5729 goto tls_get_addr_check; 5730 break; 5731 5732 case R_PPC_GOT_TLSLD16: 5733 case R_PPC_GOT_TLSLD16_LO: 5734 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0) 5735 { 5736 tls_get_addr_check: 5737 if (rel + 1 < relend) 5738 { 5739 enum elf_ppc_reloc_type r_type2; 5740 unsigned long r_symndx2; 5741 struct elf_link_hash_entry *h2; 5742 bfd_vma insn1, insn2; 5743 bfd_vma offset; 5744 5745 /* The next instruction should be a call to 5746 __tls_get_addr. Peek at the reloc to be sure. */ 5747 r_type2 = ELF32_R_TYPE (rel[1].r_info); 5748 r_symndx2 = ELF32_R_SYM (rel[1].r_info); 5749 if (r_symndx2 < symtab_hdr->sh_info 5750 || (r_type2 != R_PPC_REL14 5751 && r_type2 != R_PPC_REL14_BRTAKEN 5752 && r_type2 != R_PPC_REL14_BRNTAKEN 5753 && r_type2 != R_PPC_REL24 5754 && r_type2 != R_PPC_PLTREL24)) 5755 break; 5756 5757 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info]; 5758 while (h2->root.type == bfd_link_hash_indirect 5759 || h2->root.type == bfd_link_hash_warning) 5760 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link; 5761 if (h2 == NULL || h2 != htab->tls_get_addr) 5762 break; 5763 5764 /* OK, it checks out. Replace the call. */ 5765 offset = rel[1].r_offset; 5766 insn1 = bfd_get_32 (output_bfd, 5767 contents + rel->r_offset - 2); 5768 if ((tls_mask & tls_gd) != 0) 5769 { 5770 /* IE */ 5771 insn1 &= (1 << 26) - 1; 5772 insn1 |= 32 << 26; /* lwz */ 5773 insn2 = 0x7c631214; /* add 3,3,2 */ 5774 rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE); 5775 rel[1].r_addend = 0; 5776 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3) 5777 + R_PPC_GOT_TPREL16); 5778 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 5779 } 5780 else 5781 { 5782 /* LE */ 5783 insn1 = 0x3c620000; /* addis 3,2,0 */ 5784 insn2 = 0x38630000; /* addi 3,3,0 */ 5785 if (tls_gd == 0) 5786 { 5787 /* Was an LD reloc. */ 5788 r_symndx = 0; 5789 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; 5790 } 5791 r_type = R_PPC_TPREL16_HA; 5792 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 5793 rel[1].r_info = ELF32_R_INFO (r_symndx, 5794 R_PPC_TPREL16_LO); 5795 rel[1].r_offset += 2; 5796 rel[1].r_addend = rel->r_addend; 5797 } 5798 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2); 5799 bfd_put_32 (output_bfd, insn2, contents + offset); 5800 if (tls_gd == 0) 5801 { 5802 /* We changed the symbol on an LD reloc. Start over 5803 in order to get h, sym, sec etc. right. */ 5804 rel--; 5805 continue; 5806 } 5807 } 5808 } 5809 break; 5810 } 5811 5812 /* Handle other relocations that tweak non-addend part of insn. */ 5813 branch_bit = 0; 5814 switch (r_type) 5815 { 5816 default: 5817 break; 5818 5819 /* Branch taken prediction relocations. */ 5820 case R_PPC_ADDR14_BRTAKEN: 5821 case R_PPC_REL14_BRTAKEN: 5822 branch_bit = BRANCH_PREDICT_BIT; 5823 /* Fall thru */ 5824 5825 /* Branch not taken prediction relocations. */ 5826 case R_PPC_ADDR14_BRNTAKEN: 5827 case R_PPC_REL14_BRNTAKEN: 5828 insn = bfd_get_32 (output_bfd, contents + rel->r_offset); 5829 insn &= ~BRANCH_PREDICT_BIT; 5830 insn |= branch_bit; 5831 5832 from = (rel->r_offset 5833 + input_section->output_offset 5834 + input_section->output_section->vma); 5835 5836 /* Invert 'y' bit if not the default. */ 5837 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0) 5838 insn ^= BRANCH_PREDICT_BIT; 5839 5840 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 5841 break; 5842 } 5843 5844 addend = rel->r_addend; 5845 tls_type = 0; 5846 howto = NULL; 5847 if (r_type < R_PPC_max) 5848 howto = ppc_elf_howto_table[r_type]; 5849 switch (r_type) 5850 { 5851 default: 5852 (*_bfd_error_handler) 5853 (_("%B: unknown relocation type %d for symbol %s"), 5854 input_bfd, (int) r_type, sym_name); 5855 5856 bfd_set_error (bfd_error_bad_value); 5857 ret = FALSE; 5858 continue; 5859 5860 case R_PPC_NONE: 5861 case R_PPC_TLS: 5862 case R_PPC_EMB_MRKREF: 5863 case R_PPC_GNU_VTINHERIT: 5864 case R_PPC_GNU_VTENTRY: 5865 continue; 5866 5867 /* GOT16 relocations. Like an ADDR16 using the symbol's 5868 address in the GOT as relocation value instead of the 5869 symbol's value itself. Also, create a GOT entry for the 5870 symbol and put the symbol value there. */ 5871 case R_PPC_GOT_TLSGD16: 5872 case R_PPC_GOT_TLSGD16_LO: 5873 case R_PPC_GOT_TLSGD16_HI: 5874 case R_PPC_GOT_TLSGD16_HA: 5875 tls_type = TLS_TLS | TLS_GD; 5876 goto dogot; 5877 5878 case R_PPC_GOT_TLSLD16: 5879 case R_PPC_GOT_TLSLD16_LO: 5880 case R_PPC_GOT_TLSLD16_HI: 5881 case R_PPC_GOT_TLSLD16_HA: 5882 tls_type = TLS_TLS | TLS_LD; 5883 goto dogot; 5884 5885 case R_PPC_GOT_TPREL16: 5886 case R_PPC_GOT_TPREL16_LO: 5887 case R_PPC_GOT_TPREL16_HI: 5888 case R_PPC_GOT_TPREL16_HA: 5889 tls_type = TLS_TLS | TLS_TPREL; 5890 goto dogot; 5891 5892 case R_PPC_GOT_DTPREL16: 5893 case R_PPC_GOT_DTPREL16_LO: 5894 case R_PPC_GOT_DTPREL16_HI: 5895 case R_PPC_GOT_DTPREL16_HA: 5896 tls_type = TLS_TLS | TLS_DTPREL; 5897 goto dogot; 5898 5899 case R_PPC_GOT16: 5900 case R_PPC_GOT16_LO: 5901 case R_PPC_GOT16_HI: 5902 case R_PPC_GOT16_HA: 5903 dogot: 5904 { 5905 /* Relocation is to the entry for this symbol in the global 5906 offset table. */ 5907 bfd_vma off; 5908 bfd_vma *offp; 5909 unsigned long indx; 5910 5911 if (htab->got == NULL) 5912 abort (); 5913 5914 indx = 0; 5915 if (tls_type == (TLS_TLS | TLS_LD) 5916 && (h == NULL 5917 || !h->def_dynamic)) 5918 offp = &htab->tlsld_got.offset; 5919 else if (h != NULL) 5920 { 5921 bfd_boolean dyn; 5922 dyn = htab->elf.dynamic_sections_created; 5923 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) 5924 || (info->shared 5925 && SYMBOL_REFERENCES_LOCAL (info, h))) 5926 /* This is actually a static link, or it is a 5927 -Bsymbolic link and the symbol is defined 5928 locally, or the symbol was forced to be local 5929 because of a version file. */ 5930 ; 5931 else 5932 { 5933 indx = h->dynindx; 5934 unresolved_reloc = FALSE; 5935 } 5936 offp = &h->got.offset; 5937 } 5938 else 5939 { 5940 if (local_got_offsets == NULL) 5941 abort (); 5942 offp = &local_got_offsets[r_symndx]; 5943 } 5944 5945 /* The offset must always be a multiple of 4. We use the 5946 least significant bit to record whether we have already 5947 processed this entry. */ 5948 off = *offp; 5949 if ((off & 1) != 0) 5950 off &= ~1; 5951 else 5952 { 5953 unsigned int tls_m = (tls_mask 5954 & (TLS_LD | TLS_GD | TLS_DTPREL 5955 | TLS_TPREL | TLS_TPRELGD)); 5956 5957 if (offp == &htab->tlsld_got.offset) 5958 tls_m = TLS_LD; 5959 else if (h == NULL 5960 || !h->def_dynamic) 5961 tls_m &= ~TLS_LD; 5962 5963 /* We might have multiple got entries for this sym. 5964 Initialize them all. */ 5965 do 5966 { 5967 int tls_ty = 0; 5968 5969 if ((tls_m & TLS_LD) != 0) 5970 { 5971 tls_ty = TLS_TLS | TLS_LD; 5972 tls_m &= ~TLS_LD; 5973 } 5974 else if ((tls_m & TLS_GD) != 0) 5975 { 5976 tls_ty = TLS_TLS | TLS_GD; 5977 tls_m &= ~TLS_GD; 5978 } 5979 else if ((tls_m & TLS_DTPREL) != 0) 5980 { 5981 tls_ty = TLS_TLS | TLS_DTPREL; 5982 tls_m &= ~TLS_DTPREL; 5983 } 5984 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0) 5985 { 5986 tls_ty = TLS_TLS | TLS_TPREL; 5987 tls_m = 0; 5988 } 5989 5990 /* Generate relocs for the dynamic linker. */ 5991 if ((info->shared || indx != 0) 5992 && (h == NULL 5993 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 5994 || h->root.type != bfd_link_hash_undefweak)) 5995 { 5996 outrel.r_offset = (htab->got->output_section->vma 5997 + htab->got->output_offset 5998 + off); 5999 outrel.r_addend = 0; 6000 if (tls_ty & (TLS_LD | TLS_GD)) 6001 { 6002 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32); 6003 if (tls_ty == (TLS_TLS | TLS_GD)) 6004 { 6005 loc = htab->relgot->contents; 6006 loc += (htab->relgot->reloc_count++ 6007 * sizeof (Elf32_External_Rela)); 6008 bfd_elf32_swap_reloca_out (output_bfd, 6009 &outrel, loc); 6010 outrel.r_offset += 4; 6011 outrel.r_info 6012 = ELF32_R_INFO (indx, R_PPC_DTPREL32); 6013 } 6014 } 6015 else if (tls_ty == (TLS_TLS | TLS_DTPREL)) 6016 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32); 6017 else if (tls_ty == (TLS_TLS | TLS_TPREL)) 6018 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32); 6019 else if (indx == 0) 6020 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE); 6021 else 6022 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT); 6023 if (indx == 0) 6024 { 6025 outrel.r_addend += relocation; 6026 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL)) 6027 outrel.r_addend -= htab->elf.tls_sec->vma; 6028 } 6029 loc = htab->relgot->contents; 6030 loc += (htab->relgot->reloc_count++ 6031 * sizeof (Elf32_External_Rela)); 6032 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 6033 } 6034 6035 /* Init the .got section contents if we're not 6036 emitting a reloc. */ 6037 else 6038 { 6039 bfd_vma value = relocation; 6040 6041 if (tls_ty == (TLS_TLS | TLS_LD)) 6042 value = 1; 6043 else if (tls_ty != 0) 6044 { 6045 value -= htab->elf.tls_sec->vma + DTP_OFFSET; 6046 if (tls_ty == (TLS_TLS | TLS_TPREL)) 6047 value += DTP_OFFSET - TP_OFFSET; 6048 6049 if (tls_ty == (TLS_TLS | TLS_GD)) 6050 { 6051 bfd_put_32 (output_bfd, value, 6052 htab->got->contents + off + 4); 6053 value = 1; 6054 } 6055 } 6056 bfd_put_32 (output_bfd, value, 6057 htab->got->contents + off); 6058 } 6059 6060 off += 4; 6061 if (tls_ty & (TLS_LD | TLS_GD)) 6062 off += 4; 6063 } 6064 while (tls_m != 0); 6065 6066 off = *offp; 6067 *offp = off | 1; 6068 } 6069 6070 if (off >= (bfd_vma) -2) 6071 abort (); 6072 6073 if ((tls_type & TLS_TLS) != 0) 6074 { 6075 if (tls_type != (TLS_TLS | TLS_LD)) 6076 { 6077 if ((tls_mask & TLS_LD) != 0 6078 && !(h == NULL 6079 || !h->def_dynamic)) 6080 off += 8; 6081 if (tls_type != (TLS_TLS | TLS_GD)) 6082 { 6083 if ((tls_mask & TLS_GD) != 0) 6084 off += 8; 6085 if (tls_type != (TLS_TLS | TLS_DTPREL)) 6086 { 6087 if ((tls_mask & TLS_DTPREL) != 0) 6088 off += 4; 6089 } 6090 } 6091 } 6092 } 6093 6094 relocation = htab->got->output_offset + off; 6095 relocation -= htab->elf.hgot->root.u.def.value; 6096 6097 /* Addends on got relocations don't make much sense. 6098 x+off@got is actually x@got+off, and since the got is 6099 generated by a hash table traversal, the value in the 6100 got at entry m+n bears little relation to the entry m. */ 6101 if (addend != 0) 6102 (*_bfd_error_handler) 6103 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"), 6104 input_bfd, 6105 input_section, 6106 (long) rel->r_offset, 6107 howto->name, 6108 sym_name); 6109 } 6110 break; 6111 6112 /* Relocations that need no special processing. */ 6113 case R_PPC_LOCAL24PC: 6114 /* It makes no sense to point a local relocation 6115 at a symbol not in this object. */ 6116 if (unresolved_reloc) 6117 { 6118 if (! (*info->callbacks->undefined_symbol) (info, 6119 h->root.root.string, 6120 input_bfd, 6121 input_section, 6122 rel->r_offset, 6123 TRUE)) 6124 return FALSE; 6125 continue; 6126 } 6127 break; 6128 6129 case R_PPC_DTPREL16: 6130 case R_PPC_DTPREL16_LO: 6131 case R_PPC_DTPREL16_HI: 6132 case R_PPC_DTPREL16_HA: 6133 addend -= htab->elf.tls_sec->vma + DTP_OFFSET; 6134 break; 6135 6136 /* Relocations that may need to be propagated if this is a shared 6137 object. */ 6138 case R_PPC_TPREL16: 6139 case R_PPC_TPREL16_LO: 6140 case R_PPC_TPREL16_HI: 6141 case R_PPC_TPREL16_HA: 6142 addend -= htab->elf.tls_sec->vma + TP_OFFSET; 6143 /* The TPREL16 relocs shouldn't really be used in shared 6144 libs as they will result in DT_TEXTREL being set, but 6145 support them anyway. */ 6146 goto dodyn; 6147 6148 case R_PPC_TPREL32: 6149 addend -= htab->elf.tls_sec->vma + TP_OFFSET; 6150 goto dodyn; 6151 6152 case R_PPC_DTPREL32: 6153 addend -= htab->elf.tls_sec->vma + DTP_OFFSET; 6154 goto dodyn; 6155 6156 case R_PPC_DTPMOD32: 6157 relocation = 1; 6158 addend = 0; 6159 goto dodyn; 6160 6161 case R_PPC_REL16: 6162 case R_PPC_REL16_LO: 6163 case R_PPC_REL16_HI: 6164 case R_PPC_REL16_HA: 6165 break; 6166 6167 case R_PPC_REL24: 6168 case R_PPC_REL32: 6169 case R_PPC_REL14: 6170 case R_PPC_REL14_BRTAKEN: 6171 case R_PPC_REL14_BRNTAKEN: 6172 /* If these relocations are not to a named symbol, they can be 6173 handled right here, no need to bother the dynamic linker. */ 6174 if (SYMBOL_REFERENCES_LOCAL (info, h) 6175 || h == htab->elf.hgot) 6176 break; 6177 /* fall through */ 6178 6179 /* Relocations that always need to be propagated if this is a shared 6180 object. */ 6181 case R_PPC_ADDR32: 6182 case R_PPC_ADDR24: 6183 case R_PPC_ADDR16: 6184 case R_PPC_ADDR16_LO: 6185 case R_PPC_ADDR16_HI: 6186 case R_PPC_ADDR16_HA: 6187 case R_PPC_ADDR14: 6188 case R_PPC_ADDR14_BRTAKEN: 6189 case R_PPC_ADDR14_BRNTAKEN: 6190 case R_PPC_UADDR32: 6191 case R_PPC_UADDR16: 6192 /* r_symndx will be zero only for relocs against symbols 6193 from removed linkonce sections, or sections discarded by 6194 a linker script. */ 6195 dodyn: 6196 if (r_symndx == 0) 6197 break; 6198 /* Fall thru. */ 6199 6200 if ((input_section->flags & SEC_ALLOC) == 0) 6201 break; 6202 /* Fall thru. */ 6203 6204 if ((info->shared 6205 && (h == NULL 6206 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 6207 || h->root.type != bfd_link_hash_undefweak) 6208 && (MUST_BE_DYN_RELOC (r_type) 6209 || !SYMBOL_CALLS_LOCAL (info, h))) 6210 || (ELIMINATE_COPY_RELOCS 6211 && !info->shared 6212 && h != NULL 6213 && h->dynindx != -1 6214 && !h->non_got_ref 6215 && h->def_dynamic 6216 && !h->def_regular)) 6217 { 6218 int skip; 6219 6220 #ifdef DEBUG 6221 fprintf (stderr, "ppc_elf_relocate_section needs to " 6222 "create relocation for %s\n", 6223 (h && h->root.root.string 6224 ? h->root.root.string : "<unknown>")); 6225 #endif 6226 6227 /* When generating a shared object, these relocations 6228 are copied into the output file to be resolved at run 6229 time. */ 6230 if (sreloc == NULL) 6231 { 6232 const char *name; 6233 6234 name = (bfd_elf_string_from_elf_section 6235 (input_bfd, 6236 elf_elfheader (input_bfd)->e_shstrndx, 6237 elf_section_data (input_section)->rel_hdr.sh_name)); 6238 if (name == NULL) 6239 return FALSE; 6240 6241 BFD_ASSERT (strncmp (name, ".rela", 5) == 0 6242 && strcmp (bfd_get_section_name (input_bfd, 6243 input_section), 6244 name + 5) == 0); 6245 6246 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name); 6247 BFD_ASSERT (sreloc != NULL); 6248 } 6249 6250 skip = 0; 6251 6252 outrel.r_offset = 6253 _bfd_elf_section_offset (output_bfd, info, input_section, 6254 rel->r_offset); 6255 if (outrel.r_offset == (bfd_vma) -1 6256 || outrel.r_offset == (bfd_vma) -2) 6257 skip = (int) outrel.r_offset; 6258 outrel.r_offset += (input_section->output_section->vma 6259 + input_section->output_offset); 6260 6261 if (skip) 6262 memset (&outrel, 0, sizeof outrel); 6263 else if (!SYMBOL_REFERENCES_LOCAL (info, h)) 6264 { 6265 unresolved_reloc = FALSE; 6266 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 6267 outrel.r_addend = rel->r_addend; 6268 } 6269 else 6270 { 6271 outrel.r_addend = relocation + rel->r_addend; 6272 6273 if (r_type == R_PPC_ADDR32) 6274 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE); 6275 else 6276 { 6277 long indx; 6278 6279 if (bfd_is_abs_section (sec)) 6280 indx = 0; 6281 else if (sec == NULL || sec->owner == NULL) 6282 { 6283 bfd_set_error (bfd_error_bad_value); 6284 return FALSE; 6285 } 6286 else 6287 { 6288 asection *osec; 6289 6290 /* We are turning this relocation into one 6291 against a section symbol. It would be 6292 proper to subtract the symbol's value, 6293 osec->vma, from the emitted reloc addend, 6294 but ld.so expects buggy relocs. */ 6295 osec = sec->output_section; 6296 indx = elf_section_data (osec)->dynindx; 6297 BFD_ASSERT (indx > 0); 6298 #ifdef DEBUG 6299 if (indx <= 0) 6300 printf ("indx=%d section=%s flags=%08x name=%s\n", 6301 indx, osec->name, osec->flags, 6302 h->root.root.string); 6303 #endif 6304 } 6305 6306 outrel.r_info = ELF32_R_INFO (indx, r_type); 6307 } 6308 } 6309 6310 loc = sreloc->contents; 6311 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 6312 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 6313 6314 if (skip == -1) 6315 continue; 6316 6317 /* This reloc will be computed at runtime. We clear the memory 6318 so that it contains predictable value. */ 6319 if (! skip 6320 && ((input_section->flags & SEC_ALLOC) != 0 6321 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE)) 6322 { 6323 relocation = howto->pc_relative ? outrel.r_offset : 0; 6324 addend = 0; 6325 break; 6326 } 6327 } 6328 break; 6329 6330 case R_PPC_RELAX32PC_PLT: 6331 case R_PPC_RELAX32_PLT: 6332 { 6333 struct plt_entry *ent = find_plt_ent (h, got2, addend); 6334 6335 if (htab->plt_type == PLT_NEW) 6336 relocation = (htab->glink->output_section->vma 6337 + htab->glink->output_offset 6338 + ent->glink_offset); 6339 else 6340 relocation = (htab->plt->output_section->vma 6341 + htab->plt->output_offset 6342 + ent->plt.offset); 6343 addend = 0; 6344 } 6345 if (r_type == R_PPC_RELAX32_PLT) 6346 goto relax32; 6347 /* Fall thru */ 6348 6349 case R_PPC_RELAX32PC: 6350 relocation -= (input_section->output_section->vma 6351 + input_section->output_offset 6352 + rel->r_offset - 4); 6353 /* Fall thru */ 6354 6355 case R_PPC_RELAX32: 6356 relax32: 6357 { 6358 unsigned long t0; 6359 unsigned long t1; 6360 6361 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset); 6362 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4); 6363 6364 /* We're clearing the bits for R_PPC_ADDR16_HA 6365 and R_PPC_ADDR16_LO here. */ 6366 t0 &= ~0xffff; 6367 t1 &= ~0xffff; 6368 6369 /* t0 is HA, t1 is LO */ 6370 relocation += addend; 6371 t0 |= ((relocation + 0x8000) >> 16) & 0xffff; 6372 t1 |= relocation & 0xffff; 6373 6374 bfd_put_32 (output_bfd, t0, contents + rel->r_offset); 6375 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4); 6376 } 6377 continue; 6378 6379 /* Indirect .sdata relocation. */ 6380 case R_PPC_EMB_SDAI16: 6381 BFD_ASSERT (htab->sdata[0].section != NULL); 6382 relocation 6383 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0], 6384 h, relocation, rel); 6385 break; 6386 6387 /* Indirect .sdata2 relocation. */ 6388 case R_PPC_EMB_SDA2I16: 6389 BFD_ASSERT (htab->sdata[1].section != NULL); 6390 relocation 6391 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1], 6392 h, relocation, rel); 6393 break; 6394 6395 /* Handle the TOC16 reloc. We want to use the offset within the .got 6396 section, not the actual VMA. This is appropriate when generating 6397 an embedded ELF object, for which the .got section acts like the 6398 AIX .toc section. */ 6399 case R_PPC_TOC16: /* phony GOT16 relocations */ 6400 BFD_ASSERT (sec != NULL); 6401 BFD_ASSERT (bfd_is_und_section (sec) 6402 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0 6403 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0); 6404 6405 addend -= sec->output_section->vma + sec->output_offset + 0x8000; 6406 break; 6407 6408 case R_PPC_PLTREL24: 6409 /* Relocation is to the entry for this symbol in the 6410 procedure linkage table. */ 6411 { 6412 struct plt_entry *ent = find_plt_ent (h, got2, addend); 6413 6414 addend = 0; 6415 if (ent == NULL 6416 || htab->plt == NULL) 6417 { 6418 /* We didn't make a PLT entry for this symbol. This 6419 happens when statically linking PIC code, or when 6420 using -Bsymbolic. */ 6421 break; 6422 } 6423 6424 unresolved_reloc = FALSE; 6425 if (htab->plt_type == PLT_NEW) 6426 relocation = (htab->glink->output_section->vma 6427 + htab->glink->output_offset 6428 + ent->glink_offset); 6429 else 6430 relocation = (htab->plt->output_section->vma 6431 + htab->plt->output_offset 6432 + ent->plt.offset); 6433 } 6434 break; 6435 6436 /* Relocate against _SDA_BASE_. */ 6437 case R_PPC_SDAREL16: 6438 { 6439 const char *name; 6440 struct elf_link_hash_entry *sh; 6441 6442 BFD_ASSERT (sec != NULL); 6443 name = bfd_get_section_name (abfd, sec->output_section); 6444 if (! ((strncmp (name, ".sdata", 6) == 0 6445 && (name[6] == 0 || name[6] == '.')) 6446 || (strncmp (name, ".sbss", 5) == 0 6447 && (name[5] == 0 || name[5] == '.')))) 6448 { 6449 (*_bfd_error_handler) 6450 (_("%B: the target (%s) of a %s relocation is " 6451 "in the wrong output section (%s)"), 6452 input_bfd, 6453 sym_name, 6454 howto->name, 6455 name); 6456 } 6457 sh = htab->sdata[0].sym; 6458 addend -= (sh->root.u.def.value 6459 + sh->root.u.def.section->output_offset 6460 + sh->root.u.def.section->output_section->vma); 6461 } 6462 break; 6463 6464 /* Relocate against _SDA2_BASE_. */ 6465 case R_PPC_EMB_SDA2REL: 6466 { 6467 const char *name; 6468 struct elf_link_hash_entry *sh; 6469 6470 BFD_ASSERT (sec != NULL); 6471 name = bfd_get_section_name (abfd, sec->output_section); 6472 if (! (strncmp (name, ".sdata2", 7) == 0 6473 || strncmp (name, ".sbss2", 6) == 0)) 6474 { 6475 (*_bfd_error_handler) 6476 (_("%B: the target (%s) of a %s relocation is " 6477 "in the wrong output section (%s)"), 6478 input_bfd, 6479 sym_name, 6480 howto->name, 6481 name); 6482 6483 bfd_set_error (bfd_error_bad_value); 6484 ret = FALSE; 6485 continue; 6486 } 6487 sh = htab->sdata[1].sym; 6488 addend -= (sh->root.u.def.value 6489 + sh->root.u.def.section->output_offset 6490 + sh->root.u.def.section->output_section->vma); 6491 } 6492 break; 6493 6494 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */ 6495 case R_PPC_EMB_SDA21: 6496 case R_PPC_EMB_RELSDA: 6497 { 6498 const char *name; 6499 int reg; 6500 struct elf_link_hash_entry *sh; 6501 6502 BFD_ASSERT (sec != NULL); 6503 name = bfd_get_section_name (abfd, sec->output_section); 6504 if (((strncmp (name, ".sdata", 6) == 0 6505 && (name[6] == 0 || name[6] == '.')) 6506 || (strncmp (name, ".sbss", 5) == 0 6507 && (name[5] == 0 || name[5] == '.')))) 6508 { 6509 reg = 13; 6510 sh = htab->sdata[0].sym; 6511 addend -= (sh->root.u.def.value 6512 + sh->root.u.def.section->output_offset 6513 + sh->root.u.def.section->output_section->vma); 6514 } 6515 6516 else if (strncmp (name, ".sdata2", 7) == 0 6517 || strncmp (name, ".sbss2", 6) == 0) 6518 { 6519 reg = 2; 6520 sh = htab->sdata[1].sym; 6521 addend -= (sh->root.u.def.value 6522 + sh->root.u.def.section->output_offset 6523 + sh->root.u.def.section->output_section->vma); 6524 } 6525 6526 else if (strcmp (name, ".PPC.EMB.sdata0") == 0 6527 || strcmp (name, ".PPC.EMB.sbss0") == 0) 6528 { 6529 reg = 0; 6530 } 6531 6532 else 6533 { 6534 (*_bfd_error_handler) 6535 (_("%B: the target (%s) of a %s relocation is " 6536 "in the wrong output section (%s)"), 6537 input_bfd, 6538 sym_name, 6539 howto->name, 6540 name); 6541 6542 bfd_set_error (bfd_error_bad_value); 6543 ret = FALSE; 6544 continue; 6545 } 6546 6547 if (r_type == R_PPC_EMB_SDA21) 6548 { /* fill in register field */ 6549 insn = bfd_get_32 (output_bfd, contents + rel->r_offset); 6550 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT); 6551 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 6552 } 6553 } 6554 break; 6555 6556 /* Relocate against the beginning of the section. */ 6557 case R_PPC_SECTOFF: 6558 case R_PPC_SECTOFF_LO: 6559 case R_PPC_SECTOFF_HI: 6560 case R_PPC_SECTOFF_HA: 6561 BFD_ASSERT (sec != NULL); 6562 addend -= sec->output_section->vma; 6563 break; 6564 6565 /* Negative relocations. */ 6566 case R_PPC_EMB_NADDR32: 6567 case R_PPC_EMB_NADDR16: 6568 case R_PPC_EMB_NADDR16_LO: 6569 case R_PPC_EMB_NADDR16_HI: 6570 case R_PPC_EMB_NADDR16_HA: 6571 addend -= 2 * relocation; 6572 break; 6573 6574 case R_PPC_COPY: 6575 case R_PPC_GLOB_DAT: 6576 case R_PPC_JMP_SLOT: 6577 case R_PPC_RELATIVE: 6578 case R_PPC_PLT32: 6579 case R_PPC_PLTREL32: 6580 case R_PPC_PLT16_LO: 6581 case R_PPC_PLT16_HI: 6582 case R_PPC_PLT16_HA: 6583 case R_PPC_ADDR30: 6584 case R_PPC_EMB_RELSEC16: 6585 case R_PPC_EMB_RELST_LO: 6586 case R_PPC_EMB_RELST_HI: 6587 case R_PPC_EMB_RELST_HA: 6588 case R_PPC_EMB_BIT_FLD: 6589 (*_bfd_error_handler) 6590 (_("%B: relocation %s is not yet supported for symbol %s."), 6591 input_bfd, 6592 howto->name, 6593 sym_name); 6594 6595 bfd_set_error (bfd_error_invalid_operation); 6596 ret = FALSE; 6597 continue; 6598 } 6599 6600 /* Do any further special processing. */ 6601 switch (r_type) 6602 { 6603 default: 6604 break; 6605 6606 case R_PPC_ADDR16_HA: 6607 case R_PPC_REL16_HA: 6608 case R_PPC_GOT16_HA: 6609 case R_PPC_PLT16_HA: 6610 case R_PPC_SECTOFF_HA: 6611 case R_PPC_TPREL16_HA: 6612 case R_PPC_DTPREL16_HA: 6613 case R_PPC_GOT_TLSGD16_HA: 6614 case R_PPC_GOT_TLSLD16_HA: 6615 case R_PPC_GOT_TPREL16_HA: 6616 case R_PPC_GOT_DTPREL16_HA: 6617 case R_PPC_EMB_NADDR16_HA: 6618 case R_PPC_EMB_RELST_HA: 6619 /* It's just possible that this symbol is a weak symbol 6620 that's not actually defined anywhere. In that case, 6621 'sec' would be NULL, and we should leave the symbol 6622 alone (it will be set to zero elsewhere in the link). */ 6623 if (sec != NULL) 6624 /* Add 0x10000 if sign bit in 0:15 is set. 6625 Bits 0:15 are not used. */ 6626 addend += 0x8000; 6627 break; 6628 } 6629 6630 #ifdef DEBUG 6631 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, " 6632 "offset = %ld, addend = %ld\n", 6633 howto->name, 6634 (int) r_type, 6635 sym_name, 6636 r_symndx, 6637 (long) rel->r_offset, 6638 (long) addend); 6639 #endif 6640 6641 if (unresolved_reloc 6642 && !((input_section->flags & SEC_DEBUGGING) != 0 6643 && h->def_dynamic)) 6644 { 6645 (*_bfd_error_handler) 6646 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), 6647 input_bfd, 6648 input_section, 6649 (long) rel->r_offset, 6650 howto->name, 6651 sym_name); 6652 ret = FALSE; 6653 } 6654 6655 r = _bfd_final_link_relocate (howto, 6656 input_bfd, 6657 input_section, 6658 contents, 6659 rel->r_offset, 6660 relocation, 6661 addend); 6662 6663 if (r != bfd_reloc_ok) 6664 { 6665 if (r == bfd_reloc_overflow) 6666 { 6667 if (warned) 6668 continue; 6669 if (h != NULL 6670 && h->root.type == bfd_link_hash_undefweak 6671 && howto->pc_relative) 6672 { 6673 /* Assume this is a call protected by other code that 6674 detect the symbol is undefined. If this is the case, 6675 we can safely ignore the overflow. If not, the 6676 program is hosed anyway, and a little warning isn't 6677 going to help. */ 6678 6679 continue; 6680 } 6681 6682 if (! (*info->callbacks->reloc_overflow) (info, 6683 (h ? &h->root : NULL), 6684 sym_name, 6685 howto->name, 6686 rel->r_addend, 6687 input_bfd, 6688 input_section, 6689 rel->r_offset)) 6690 return FALSE; 6691 } 6692 else 6693 { 6694 (*_bfd_error_handler) 6695 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"), 6696 input_bfd, input_section, 6697 (long) rel->r_offset, howto->name, sym_name, (int) r); 6698 ret = FALSE; 6699 } 6700 } 6701 } 6702 6703 #ifdef DEBUG 6704 fprintf (stderr, "\n"); 6705 #endif 6706 6707 return ret; 6708 } 6709 6710 #define PPC_LO(v) ((v) & 0xffff) 6711 #define PPC_HI(v) (((v) >> 16) & 0xffff) 6712 #define PPC_HA(v) PPC_HI ((v) + 0x8000) 6713 6714 /* Finish up dynamic symbol handling. We set the contents of various 6715 dynamic sections here. */ 6716 6717 static bfd_boolean 6718 ppc_elf_finish_dynamic_symbol (bfd *output_bfd, 6719 struct bfd_link_info *info, 6720 struct elf_link_hash_entry *h, 6721 Elf_Internal_Sym *sym) 6722 { 6723 struct ppc_elf_link_hash_table *htab; 6724 struct plt_entry *ent; 6725 bfd_boolean doneone; 6726 6727 #ifdef DEBUG 6728 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s", 6729 h->root.root.string); 6730 #endif 6731 6732 htab = ppc_elf_hash_table (info); 6733 BFD_ASSERT (htab->elf.dynobj != NULL); 6734 6735 doneone = FALSE; 6736 for (ent = h->plt.plist; ent != NULL; ent = ent->next) 6737 if (ent->plt.offset != (bfd_vma) -1) 6738 { 6739 if (!doneone) 6740 { 6741 Elf_Internal_Rela rela; 6742 bfd_byte *loc; 6743 bfd_vma reloc_index; 6744 6745 if (htab->plt_type == PLT_NEW) 6746 reloc_index = ent->plt.offset / 4; 6747 else 6748 { 6749 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size) 6750 / htab->plt_slot_size); 6751 if (reloc_index > PLT_NUM_SINGLE_ENTRIES 6752 && htab->plt_type == PLT_OLD) 6753 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2; 6754 } 6755 6756 /* This symbol has an entry in the procedure linkage table. 6757 Set it up. */ 6758 if (htab->plt_type == PLT_VXWORKS) 6759 { 6760 bfd_vma got_offset; 6761 const bfd_vma *plt_entry; 6762 6763 /* The first three entries in .got.plt are reserved. */ 6764 got_offset = (reloc_index + 3) * 4; 6765 6766 /* Use the right PLT. */ 6767 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry 6768 : ppc_elf_vxworks_plt_entry; 6769 6770 /* Fill in the .plt on VxWorks. */ 6771 if (info->shared) 6772 { 6773 bfd_vma got_offset_hi = (got_offset >> 16) 6774 + ((got_offset & 0x8000) >> 15); 6775 6776 bfd_put_32 (output_bfd, 6777 plt_entry[0] | (got_offset_hi & 0xffff), 6778 htab->plt->contents + ent->plt.offset + 0); 6779 bfd_put_32 (output_bfd, 6780 plt_entry[1] | (got_offset & 0xffff), 6781 htab->plt->contents + ent->plt.offset + 4); 6782 } 6783 else 6784 { 6785 bfd_vma got_loc 6786 = (got_offset 6787 + htab->elf.hgot->root.u.def.value 6788 + htab->elf.hgot->root.u.def.section->output_offset 6789 + htab->elf.hgot->root.u.def.section->output_section->vma); 6790 bfd_vma got_loc_hi = (got_loc >> 16) 6791 + ((got_loc & 0x8000) >> 15); 6792 6793 bfd_put_32 (output_bfd, 6794 plt_entry[0] | (got_loc_hi & 0xffff), 6795 htab->plt->contents + ent->plt.offset + 0); 6796 bfd_put_32 (output_bfd, 6797 plt_entry[1] | (got_loc & 0xffff), 6798 htab->plt->contents + ent->plt.offset + 4); 6799 } 6800 6801 bfd_put_32 (output_bfd, plt_entry[2], 6802 htab->plt->contents + ent->plt.offset + 8); 6803 bfd_put_32 (output_bfd, plt_entry[3], 6804 htab->plt->contents + ent->plt.offset + 12); 6805 6806 /* This instruction is an immediate load. The value loaded is 6807 the byte offset of the R_PPC_JMP_SLOT relocation from the 6808 start of the .rela.plt section. The value is stored in the 6809 low-order 16 bits of the load instruction. */ 6810 /* NOTE: It appears that this is now an index rather than a 6811 prescaled offset. */ 6812 bfd_put_32 (output_bfd, 6813 plt_entry[4] | reloc_index, 6814 htab->plt->contents + ent->plt.offset + 16); 6815 /* This instruction is a PC-relative branch whose target is 6816 the start of the PLT section. The address of this branch 6817 instruction is 20 bytes beyond the start of this PLT entry. 6818 The address is encoded in bits 6-29, inclusive. The value 6819 stored is right-shifted by two bits, permitting a 26-bit 6820 offset. */ 6821 bfd_put_32 (output_bfd, 6822 (plt_entry[5] 6823 | (-(ent->plt.offset + 20) & 0x03fffffc)), 6824 htab->plt->contents + ent->plt.offset + 20); 6825 bfd_put_32 (output_bfd, plt_entry[6], 6826 htab->plt->contents + ent->plt.offset + 24); 6827 bfd_put_32 (output_bfd, plt_entry[7], 6828 htab->plt->contents + ent->plt.offset + 28); 6829 6830 /* Fill in the GOT entry corresponding to this PLT slot with 6831 the address immediately after the the "bctr" instruction 6832 in this PLT entry. */ 6833 bfd_put_32 (output_bfd, (htab->plt->output_section->vma 6834 + htab->plt->output_offset 6835 + ent->plt.offset + 16), 6836 htab->sgotplt->contents + got_offset); 6837 6838 if (!info->shared) 6839 { 6840 /* Fill in a couple of entries in .rela.plt.unloaded. */ 6841 loc = htab->srelplt2->contents 6842 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index 6843 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS) 6844 * sizeof (Elf32_External_Rela)); 6845 6846 /* Provide the @ha relocation for the first instruction. */ 6847 rela.r_offset = (htab->plt->output_section->vma 6848 + htab->plt->output_offset 6849 + ent->plt.offset + 2); 6850 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, 6851 R_PPC_ADDR16_HA); 6852 rela.r_addend = got_offset; 6853 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 6854 loc += sizeof (Elf32_External_Rela); 6855 6856 /* Provide the @l relocation for the second instruction. */ 6857 rela.r_offset = (htab->plt->output_section->vma 6858 + htab->plt->output_offset 6859 + ent->plt.offset + 6); 6860 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, 6861 R_PPC_ADDR16_LO); 6862 rela.r_addend = got_offset; 6863 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 6864 loc += sizeof (Elf32_External_Rela); 6865 6866 /* Provide a relocation for the GOT entry corresponding to this 6867 PLT slot. Point it at the middle of the .plt entry. */ 6868 rela.r_offset = (htab->sgotplt->output_section->vma 6869 + htab->sgotplt->output_offset 6870 + got_offset); 6871 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx, 6872 R_PPC_ADDR32); 6873 rela.r_addend = ent->plt.offset + 16; 6874 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 6875 } 6876 6877 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT. 6878 In particular, the offset for the relocation is not the 6879 address of the PLT entry for this function, as specified 6880 by the ABI. Instead, the offset is set to the address of 6881 the GOT slot for this function. See EABI 4.4.4.1. */ 6882 rela.r_offset = (htab->sgotplt->output_section->vma 6883 + htab->sgotplt->output_offset 6884 + got_offset); 6885 6886 } 6887 else 6888 { 6889 rela.r_offset = (htab->plt->output_section->vma 6890 + htab->plt->output_offset 6891 + ent->plt.offset); 6892 if (htab->plt_type == PLT_OLD) 6893 { 6894 /* We don't need to fill in the .plt. The ppc dynamic 6895 linker will fill it in. */ 6896 } 6897 else 6898 { 6899 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset 6900 + htab->glink->output_section->vma 6901 + htab->glink->output_offset); 6902 bfd_put_32 (output_bfd, val, 6903 htab->plt->contents + ent->plt.offset); 6904 } 6905 } 6906 6907 /* Fill in the entry in the .rela.plt section. */ 6908 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT); 6909 rela.r_addend = 0; 6910 6911 loc = (htab->relplt->contents 6912 + reloc_index * sizeof (Elf32_External_Rela)); 6913 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 6914 6915 if (!h->def_regular) 6916 { 6917 /* Mark the symbol as undefined, rather than as defined in 6918 the .plt section. Leave the value alone. */ 6919 sym->st_shndx = SHN_UNDEF; 6920 /* If the symbol is weak, we do need to clear the value. 6921 Otherwise, the PLT entry would provide a definition for 6922 the symbol even if the symbol wasn't defined anywhere, 6923 and so the symbol would never be NULL. */ 6924 if (!h->ref_regular_nonweak) 6925 sym->st_value = 0; 6926 } 6927 doneone = TRUE; 6928 } 6929 6930 if (htab->plt_type == PLT_NEW) 6931 { 6932 bfd_vma plt; 6933 unsigned char *p; 6934 6935 plt = (ent->plt.offset 6936 + htab->plt->output_section->vma 6937 + htab->plt->output_offset); 6938 p = (unsigned char *) htab->glink->contents + ent->glink_offset; 6939 6940 if (info->shared || info->pie) 6941 { 6942 bfd_vma got = 0; 6943 6944 if (ent->addend >= 32768) 6945 got = (ent->addend 6946 + ent->sec->output_section->vma 6947 + ent->sec->output_offset); 6948 else if (htab->elf.hgot != NULL) 6949 got = (htab->elf.hgot->root.u.def.value 6950 + htab->elf.hgot->root.u.def.section->output_section->vma 6951 + htab->elf.hgot->root.u.def.section->output_offset); 6952 6953 plt -= got; 6954 6955 if (plt + 0x8000 < 0x10000) 6956 { 6957 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p); 6958 p += 4; 6959 bfd_put_32 (output_bfd, MTCTR_11, p); 6960 p += 4; 6961 bfd_put_32 (output_bfd, BCTR, p); 6962 p += 4; 6963 bfd_put_32 (output_bfd, NOP, p); 6964 p += 4; 6965 } 6966 else 6967 { 6968 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p); 6969 p += 4; 6970 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p); 6971 p += 4; 6972 bfd_put_32 (output_bfd, MTCTR_11, p); 6973 p += 4; 6974 bfd_put_32 (output_bfd, BCTR, p); 6975 p += 4; 6976 } 6977 } 6978 else 6979 { 6980 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p); 6981 p += 4; 6982 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p); 6983 p += 4; 6984 bfd_put_32 (output_bfd, MTCTR_11, p); 6985 p += 4; 6986 bfd_put_32 (output_bfd, BCTR, p); 6987 p += 4; 6988 6989 /* We only need one non-PIC glink stub. */ 6990 break; 6991 } 6992 } 6993 else 6994 break; 6995 } 6996 6997 if (h->needs_copy) 6998 { 6999 asection *s; 7000 Elf_Internal_Rela rela; 7001 bfd_byte *loc; 7002 7003 /* This symbols needs a copy reloc. Set it up. */ 7004 7005 #ifdef DEBUG 7006 fprintf (stderr, ", copy"); 7007 #endif 7008 7009 BFD_ASSERT (h->dynindx != -1); 7010 7011 if (ppc_elf_hash_entry (h)->has_sda_refs) 7012 s = htab->relsbss; 7013 else 7014 s = htab->relbss; 7015 BFD_ASSERT (s != NULL); 7016 7017 rela.r_offset = (h->root.u.def.value 7018 + h->root.u.def.section->output_section->vma 7019 + h->root.u.def.section->output_offset); 7020 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY); 7021 rela.r_addend = 0; 7022 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); 7023 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 7024 } 7025 7026 #ifdef DEBUG 7027 fprintf (stderr, "\n"); 7028 #endif 7029 7030 /* Mark some specially defined symbols as absolute. */ 7031 if (strcmp (h->root.root.string, "_DYNAMIC") == 0 7032 || (!htab->is_vxworks 7033 && (h == htab->elf.hgot 7034 || strcmp (h->root.root.string, 7035 "_PROCEDURE_LINKAGE_TABLE_") == 0))) 7036 sym->st_shndx = SHN_ABS; 7037 7038 return TRUE; 7039 } 7040 7041 static enum elf_reloc_type_class 7042 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela) 7043 { 7044 switch (ELF32_R_TYPE (rela->r_info)) 7045 { 7046 case R_PPC_RELATIVE: 7047 return reloc_class_relative; 7048 case R_PPC_REL24: 7049 case R_PPC_ADDR24: 7050 case R_PPC_JMP_SLOT: 7051 return reloc_class_plt; 7052 case R_PPC_COPY: 7053 return reloc_class_copy; 7054 default: 7055 return reloc_class_normal; 7056 } 7057 } 7058 7059 /* Finish up the dynamic sections. */ 7060 7061 static bfd_boolean 7062 ppc_elf_finish_dynamic_sections (bfd *output_bfd, 7063 struct bfd_link_info *info) 7064 { 7065 asection *sdyn; 7066 asection *splt; 7067 struct ppc_elf_link_hash_table *htab; 7068 bfd_vma got; 7069 bfd * dynobj; 7070 7071 #ifdef DEBUG 7072 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n"); 7073 #endif 7074 7075 htab = ppc_elf_hash_table (info); 7076 dynobj = elf_hash_table (info)->dynobj; 7077 sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); 7078 if (htab->is_vxworks) 7079 splt = bfd_get_section_by_name (dynobj, ".plt"); 7080 else 7081 splt = NULL; 7082 7083 got = 0; 7084 if (htab->elf.hgot != NULL) 7085 got = (htab->elf.hgot->root.u.def.value 7086 + htab->elf.hgot->root.u.def.section->output_section->vma 7087 + htab->elf.hgot->root.u.def.section->output_offset); 7088 7089 if (htab->elf.dynamic_sections_created) 7090 { 7091 Elf32_External_Dyn *dyncon, *dynconend; 7092 7093 BFD_ASSERT (htab->plt != NULL && sdyn != NULL); 7094 7095 dyncon = (Elf32_External_Dyn *) sdyn->contents; 7096 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); 7097 for (; dyncon < dynconend; dyncon++) 7098 { 7099 Elf_Internal_Dyn dyn; 7100 asection *s; 7101 7102 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); 7103 7104 switch (dyn.d_tag) 7105 { 7106 case DT_PLTGOT: 7107 if (htab->is_vxworks) 7108 s = htab->sgotplt; 7109 else 7110 s = htab->plt; 7111 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 7112 break; 7113 7114 case DT_PLTRELSZ: 7115 dyn.d_un.d_val = htab->relplt->size; 7116 break; 7117 7118 case DT_JMPREL: 7119 s = htab->relplt; 7120 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 7121 break; 7122 7123 case DT_PPC_GOT: 7124 dyn.d_un.d_ptr = got; 7125 break; 7126 7127 case DT_RELASZ: 7128 if (htab->is_vxworks) 7129 { 7130 if (htab->relplt) 7131 dyn.d_un.d_ptr -= htab->relplt->size; 7132 break; 7133 } 7134 continue; 7135 7136 default: 7137 continue; 7138 } 7139 7140 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 7141 } 7142 } 7143 7144 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can 7145 easily find the address of the _GLOBAL_OFFSET_TABLE_. */ 7146 if (htab->got != NULL) 7147 { 7148 unsigned char *p = htab->got->contents; 7149 bfd_vma val; 7150 7151 p += htab->elf.hgot->root.u.def.value; 7152 if (htab->plt_type == PLT_OLD) 7153 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, p - 4); 7154 7155 val = 0; 7156 if (sdyn != NULL) 7157 val = sdyn->output_section->vma + sdyn->output_offset; 7158 bfd_put_32 (output_bfd, val, p); 7159 7160 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4; 7161 } 7162 7163 /* Fill in the first entry in the VxWorks procedure linkage table. */ 7164 if (splt && splt->size > 0) 7165 { 7166 /* Use the right PLT. */ 7167 static const bfd_vma *plt_entry = NULL; 7168 plt_entry = info->shared ? 7169 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry; 7170 7171 if (!info->shared) 7172 { 7173 bfd_vma got_value = 7174 (htab->elf.hgot->root.u.def.section->output_section->vma 7175 + htab->elf.hgot->root.u.def.section->output_offset 7176 + htab->elf.hgot->root.u.def.value); 7177 bfd_vma got_hi = (got_value >> 16) + ((got_value & 0x8000) >> 15); 7178 7179 bfd_put_32 (output_bfd, plt_entry[0] | (got_hi & 0xffff), 7180 splt->contents + 0); 7181 bfd_put_32 (output_bfd, plt_entry[1] | (got_value & 0xffff), 7182 splt->contents + 4); 7183 } 7184 else 7185 { 7186 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0); 7187 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4); 7188 } 7189 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8); 7190 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12); 7191 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16); 7192 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20); 7193 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24); 7194 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28); 7195 7196 if (! info->shared) 7197 { 7198 Elf_Internal_Rela rela; 7199 bfd_byte *loc; 7200 7201 loc = htab->srelplt2->contents; 7202 7203 /* Output the @ha relocation for the first instruction. */ 7204 rela.r_offset = (htab->plt->output_section->vma 7205 + htab->plt->output_offset 7206 + 2); 7207 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA); 7208 rela.r_addend = 0; 7209 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 7210 loc += sizeof (Elf32_External_Rela); 7211 7212 /* Output the @l relocation for the second instruction. */ 7213 rela.r_offset = (htab->plt->output_section->vma 7214 + htab->plt->output_offset 7215 + 6); 7216 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO); 7217 rela.r_addend = 0; 7218 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 7219 loc += sizeof (Elf32_External_Rela); 7220 7221 /* Fix up the remaining relocations. They may have the wrong 7222 symbol index for _G_O_T_ or _P_L_T_ depending on the order 7223 in which symbols were output. */ 7224 while (loc < htab->srelplt2->contents + htab->srelplt2->size) 7225 { 7226 Elf_Internal_Rela rel; 7227 7228 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); 7229 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA); 7230 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); 7231 loc += sizeof (Elf32_External_Rela); 7232 7233 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); 7234 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO); 7235 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); 7236 loc += sizeof (Elf32_External_Rela); 7237 7238 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); 7239 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32); 7240 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); 7241 loc += sizeof (Elf32_External_Rela); 7242 } 7243 } 7244 } 7245 7246 if (htab->glink != NULL && htab->glink->contents != NULL) 7247 { 7248 unsigned char *p; 7249 unsigned char *endp; 7250 bfd_vma res0; 7251 unsigned int i; 7252 7253 /* 7254 * PIC glink code is the following: 7255 * 7256 * # ith PLT code stub. 7257 * addis 11,30,(plt+(i-1)*4-got)@ha 7258 * lwz 11,(plt+(i-1)*4-got)@l(11) 7259 * mtctr 11 7260 * bctr 7261 * 7262 * # A table of branches, one for each plt entry. 7263 * # The idea is that the plt call stub loads ctr (and r11) with these 7264 * # addresses, so (r11 - res_0) gives the plt index * 4. 7265 * res_0: b PLTresolve 7266 * res_1: b PLTresolve 7267 * . 7268 * # Some number of entries towards the end can be nops 7269 * res_n_m3: nop 7270 * res_n_m2: nop 7271 * res_n_m1: 7272 * 7273 * PLTresolve: 7274 * addis 11,11,(1f-res_0)@ha 7275 * mflr 0 7276 * bcl 20,31,1f 7277 * 1: addi 11,11,(1b-res_0)@l 7278 * mflr 12 7279 * mtlr 0 7280 * sub 11,11,12 # r11 = index * 4 7281 * addis 12,12,(got+4-1b)@ha 7282 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve 7283 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address 7284 * mtctr 0 7285 * add 0,11,11 7286 * add 11,0,11 # r11 = index * 12 = reloc offset. 7287 * bctr 7288 */ 7289 static const unsigned int pic_plt_resolve[] = 7290 { 7291 ADDIS_11_11, 7292 MFLR_0, 7293 BCL_20_31, 7294 ADDI_11_11, 7295 MFLR_12, 7296 MTLR_0, 7297 SUB_11_11_12, 7298 ADDIS_12_12, 7299 LWZ_0_12, 7300 LWZ_12_12, 7301 MTCTR_0, 7302 ADD_0_11_11, 7303 ADD_11_0_11, 7304 BCTR, 7305 NOP, 7306 NOP 7307 }; 7308 7309 static const unsigned int plt_resolve[] = 7310 { 7311 LIS_12, 7312 ADDIS_11_11, 7313 LWZ_0_12, 7314 ADDI_11_11, 7315 MTCTR_0, 7316 ADD_0_11_11, 7317 LWZ_12_12, 7318 ADD_11_0_11, 7319 BCTR, 7320 NOP, 7321 NOP, 7322 NOP, 7323 NOP, 7324 NOP, 7325 NOP, 7326 NOP 7327 }; 7328 7329 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4) 7330 abort (); 7331 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4) 7332 abort (); 7333 7334 /* Build the branch table, one for each plt entry (less one), 7335 and perhaps some padding. */ 7336 p = htab->glink->contents; 7337 p += htab->glink_pltresolve; 7338 endp = htab->glink->contents; 7339 endp += htab->glink->size - GLINK_PLTRESOLVE; 7340 while (p < endp - 8 * 4) 7341 { 7342 bfd_put_32 (output_bfd, B + endp - p, p); 7343 p += 4; 7344 } 7345 while (p < endp) 7346 { 7347 bfd_put_32 (output_bfd, NOP, p); 7348 p += 4; 7349 } 7350 7351 res0 = (htab->glink_pltresolve 7352 + htab->glink->output_section->vma 7353 + htab->glink->output_offset); 7354 7355 /* Last comes the PLTresolve stub. */ 7356 if (info->shared || info->pie) 7357 { 7358 bfd_vma bcl; 7359 7360 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++) 7361 { 7362 bfd_put_32 (output_bfd, pic_plt_resolve[i], p); 7363 p += 4; 7364 } 7365 p -= 4 * ARRAY_SIZE (pic_plt_resolve); 7366 7367 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4 7368 + htab->glink->output_section->vma 7369 + htab->glink->output_offset); 7370 7371 bfd_put_32 (output_bfd, 7372 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4); 7373 bfd_put_32 (output_bfd, 7374 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4); 7375 bfd_put_32 (output_bfd, 7376 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4); 7377 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl)) 7378 { 7379 bfd_put_32 (output_bfd, 7380 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4); 7381 bfd_put_32 (output_bfd, 7382 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4); 7383 } 7384 else 7385 { 7386 bfd_put_32 (output_bfd, 7387 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4); 7388 bfd_put_32 (output_bfd, 7389 LWZ_12_12 + 4, p + 9*4); 7390 } 7391 } 7392 else 7393 { 7394 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++) 7395 { 7396 bfd_put_32 (output_bfd, plt_resolve[i], p); 7397 p += 4; 7398 } 7399 p -= 4 * ARRAY_SIZE (plt_resolve); 7400 7401 bfd_put_32 (output_bfd, 7402 LIS_12 + PPC_HA (got + 4), p + 0*4); 7403 bfd_put_32 (output_bfd, 7404 ADDIS_11_11 + PPC_HA (-res0), p + 1*4); 7405 bfd_put_32 (output_bfd, 7406 ADDI_11_11 + PPC_LO (-res0), p + 3*4); 7407 if (PPC_HA (got + 4) == PPC_HA (got + 8)) 7408 { 7409 bfd_put_32 (output_bfd, 7410 LWZ_0_12 + PPC_LO (got + 4), p + 2*4); 7411 bfd_put_32 (output_bfd, 7412 LWZ_12_12 + PPC_LO (got + 8), p + 6*4); 7413 } 7414 else 7415 { 7416 bfd_put_32 (output_bfd, 7417 LWZU_0_12 + PPC_LO (got + 4), p + 2*4); 7418 bfd_put_32 (output_bfd, 7419 LWZ_12_12 + 4, p + 6*4); 7420 } 7421 } 7422 } 7423 7424 return TRUE; 7425 } 7426 7427 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec 7428 #define TARGET_LITTLE_NAME "elf32-powerpcle" 7429 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec 7430 #define TARGET_BIG_NAME "elf32-powerpc" 7431 #define ELF_ARCH bfd_arch_powerpc 7432 #define ELF_MACHINE_CODE EM_PPC 7433 #ifdef __QNXTARGET__ 7434 #define ELF_MAXPAGESIZE 0x1000 7435 #else 7436 #define ELF_MAXPAGESIZE 0x10000 7437 #endif 7438 #define ELF_MINPAGESIZE 0x1000 7439 #define elf_info_to_howto ppc_elf_info_to_howto 7440 7441 #ifdef EM_CYGNUS_POWERPC 7442 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC 7443 #endif 7444 7445 #ifdef EM_PPC_OLD 7446 #define ELF_MACHINE_ALT2 EM_PPC_OLD 7447 #endif 7448 7449 #define elf_backend_plt_not_loaded 1 7450 #define elf_backend_can_gc_sections 0 7451 #define elf_backend_can_refcount 1 7452 #define elf_backend_rela_normal 1 7453 7454 #define bfd_elf32_mkobject ppc_elf_mkobject 7455 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data 7456 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section 7457 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup 7458 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags 7459 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create 7460 7461 #define elf_backend_object_p ppc_elf_object_p 7462 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook 7463 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook 7464 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr 7465 #define elf_backend_relocate_section ppc_elf_relocate_section 7466 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections 7467 #define elf_backend_check_relocs ppc_elf_check_relocs 7468 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol 7469 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol 7470 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook 7471 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections 7472 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol 7473 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections 7474 #define elf_backend_fake_sections ppc_elf_fake_sections 7475 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers 7476 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus 7477 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo 7478 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class 7479 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing 7480 #define elf_backend_final_write_processing ppc_elf_final_write_processing 7481 #define elf_backend_write_section ppc_elf_write_section 7482 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr 7483 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val 7484 #define elf_backend_action_discarded ppc_elf_action_discarded 7485 7486 #include "elf32-target.h" 7487 7488 /* VxWorks Target */ 7489 7490 #undef TARGET_LITTLE_SYM 7491 #undef TARGET_LITTLE_NAME 7492 7493 #undef TARGET_BIG_SYM 7494 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec 7495 #undef TARGET_BIG_NAME 7496 #define TARGET_BIG_NAME "elf32-powerpc-vxworks" 7497 7498 /* VxWorks uses the elf default section flags for .plt. */ 7499 static const struct bfd_elf_special_section * 7500 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec) 7501 { 7502 if (sec->name == NULL) 7503 return NULL; 7504 7505 if (strcmp (sec->name, ".plt") == 0) 7506 return _bfd_elf_get_sec_type_attr (abfd, sec); 7507 7508 return ppc_elf_get_sec_type_attr (abfd, sec); 7509 } 7510 7511 /* Like ppc_elf_link_hash_table_create, but overrides 7512 appropriately for VxWorks. */ 7513 static struct bfd_link_hash_table * 7514 ppc_elf_vxworks_link_hash_table_create (bfd *abfd) 7515 { 7516 struct bfd_link_hash_table *ret; 7517 7518 ret = ppc_elf_link_hash_table_create (abfd); 7519 if (ret) 7520 { 7521 struct ppc_elf_link_hash_table *htab 7522 = (struct ppc_elf_link_hash_table *)ret; 7523 htab->is_vxworks = 1; 7524 htab->plt_type = PLT_VXWORKS; 7525 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE; 7526 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE; 7527 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE; 7528 } 7529 return ret; 7530 } 7531 7532 /* Tweak magic VxWorks symbols as they are loaded. */ 7533 static bfd_boolean 7534 ppc_elf_vxworks_add_symbol_hook (bfd *abfd, 7535 struct bfd_link_info *info, 7536 Elf_Internal_Sym *sym, 7537 const char **namep ATTRIBUTE_UNUSED, 7538 flagword *flagsp ATTRIBUTE_UNUSED, 7539 asection **secp, 7540 bfd_vma *valp) 7541 { 7542 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, 7543 valp)) 7544 return FALSE; 7545 7546 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp); 7547 } 7548 7549 static void 7550 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker) 7551 { 7552 ppc_elf_final_write_processing(abfd, linker); 7553 elf_vxworks_final_write_processing(abfd, linker); 7554 } 7555 7556 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so 7557 define it. */ 7558 #undef elf_backend_want_plt_sym 7559 #define elf_backend_want_plt_sym 1 7560 #undef elf_backend_want_got_plt 7561 #define elf_backend_want_got_plt 1 7562 #undef elf_backend_got_symbol_offset 7563 #define elf_backend_got_symbol_offset 0 7564 #undef elf_backend_plt_not_loaded 7565 #define elf_backend_plt_not_loaded 0 7566 #undef elf_backend_plt_readonly 7567 #define elf_backend_plt_readonly 1 7568 #undef elf_backend_got_header_size 7569 #define elf_backend_got_header_size 12 7570 7571 #undef bfd_elf32_bfd_link_hash_table_create 7572 #define bfd_elf32_bfd_link_hash_table_create \ 7573 ppc_elf_vxworks_link_hash_table_create 7574 #undef elf_backend_add_symbol_hook 7575 #define elf_backend_add_symbol_hook \ 7576 ppc_elf_vxworks_add_symbol_hook 7577 #undef elf_backend_link_output_symbol_hook 7578 #define elf_backend_link_output_symbol_hook \ 7579 elf_vxworks_link_output_symbol_hook 7580 #undef elf_backend_final_write_processing 7581 #define elf_backend_final_write_processing \ 7582 ppc_elf_vxworks_final_write_processing 7583 #undef elf_backend_get_sec_type_attr 7584 #define elf_backend_get_sec_type_attr \ 7585 ppc_elf_vxworks_get_sec_type_attr 7586 #undef elf_backend_emit_relocs 7587 #define elf_backend_emit_relocs \ 7588 elf_vxworks_emit_relocs 7589 7590 #undef elf32_bed 7591 #define elf32_bed ppc_elf_vxworks_bed 7592 7593 #include "elf32-target.h" 7594