1 /* BFD back-end for AMD 64 COFF files. 2 Copyright (C) 2006-2015 Free Software Foundation, Inc. 3 4 This file is part of BFD, the Binary File Descriptor library. 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3 of the License, or 9 (at your option) any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program; if not, write to the Free Software 18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 19 MA 02110-1301, USA. 20 21 Written by Kai Tietz, OneVision Software GmbH&CoKg. */ 22 23 #ifndef COFF_WITH_pex64 24 #define COFF_WITH_pex64 25 #endif 26 27 /* Note we have to make sure not to include headers twice. 28 Not all headers are wrapped in #ifdef guards, so we define 29 PEI_HEADERS to prevent double including here. */ 30 #ifndef PEI_HEADERS 31 #include "sysdep.h" 32 #include "bfd.h" 33 #include "libbfd.h" 34 #include "coff/x86_64.h" 35 #include "coff/internal.h" 36 #include "coff/pe.h" 37 #include "libcoff.h" 38 #include "libiberty.h" 39 #endif 40 41 #define BADMAG(x) AMD64BADMAG(x) 42 43 #ifdef COFF_WITH_pex64 44 # undef AOUTSZ 45 # define AOUTSZ PEPAOUTSZ 46 # define PEAOUTHDR PEPAOUTHDR 47 #endif 48 49 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2) 50 51 /* The page size is a guess based on ELF. */ 52 53 #define COFF_PAGE_SIZE 0x1000 54 55 /* For some reason when using AMD COFF the value stored in the .text 56 section for a reference to a common symbol is the value itself plus 57 any desired offset. Ian Taylor, Cygnus Support. */ 58 59 /* If we are producing relocatable output, we need to do some 60 adjustments to the object file that are not done by the 61 bfd_perform_relocation function. This function is called by every 62 reloc type to make any required adjustments. */ 63 64 static bfd_reloc_status_type 65 coff_amd64_reloc (bfd *abfd, 66 arelent *reloc_entry, 67 asymbol *symbol, 68 void * data, 69 asection *input_section ATTRIBUTE_UNUSED, 70 bfd *output_bfd, 71 char **error_message ATTRIBUTE_UNUSED) 72 { 73 symvalue diff; 74 75 #if !defined(COFF_WITH_PE) 76 if (output_bfd == NULL) 77 return bfd_reloc_continue; 78 #endif 79 80 if (bfd_is_com_section (symbol->section)) 81 { 82 #if !defined(COFF_WITH_PE) 83 /* We are relocating a common symbol. The current value in the 84 object file is ORIG + OFFSET, where ORIG is the value of the 85 common symbol as seen by the object file when it was compiled 86 (this may be zero if the symbol was undefined) and OFFSET is 87 the offset into the common symbol (normally zero, but may be 88 non-zero when referring to a field in a common structure). 89 ORIG is the negative of reloc_entry->addend, which is set by 90 the CALC_ADDEND macro below. We want to replace the value in 91 the object file with NEW + OFFSET, where NEW is the value of 92 the common symbol which we are going to put in the final 93 object file. NEW is symbol->value. */ 94 diff = symbol->value + reloc_entry->addend; 95 #else 96 /* In PE mode, we do not offset the common symbol. */ 97 diff = reloc_entry->addend; 98 #endif 99 } 100 else 101 { 102 /* For some reason bfd_perform_relocation always effectively 103 ignores the addend for a COFF target when producing 104 relocatable output. This seems to be always wrong for 386 105 COFF, so we handle the addend here instead. */ 106 #if defined(COFF_WITH_PE) 107 if (output_bfd == NULL) 108 { 109 reloc_howto_type *howto = reloc_entry->howto; 110 111 /* Although PC relative relocations are very similar between 112 PE and non-PE formats, but they are off by 1 << howto->size 113 bytes. For the external relocation, PE is very different 114 from others. See md_apply_fix3 () in gas/config/tc-amd64.c. 115 When we link PE and non-PE object files together to 116 generate a non-PE executable, we have to compensate it 117 here. */ 118 if(howto->pc_relative && howto->pcrel_offset) 119 diff = -(1 << howto->size); 120 else if(symbol->flags & BSF_WEAK) 121 diff = reloc_entry->addend - symbol->value; 122 else 123 diff = -reloc_entry->addend; 124 } 125 else 126 #endif 127 diff = reloc_entry->addend; 128 } 129 130 #if defined(COFF_WITH_PE) 131 /* FIXME: How should this case be handled? */ 132 if (reloc_entry->howto->type == R_AMD64_IMAGEBASE 133 && output_bfd != NULL 134 && bfd_get_flavour (output_bfd) == bfd_target_coff_flavour) 135 diff -= pe_data (output_bfd)->pe_opthdr.ImageBase; 136 #endif 137 138 #define DOIT(x) \ 139 x = ((x & ~howto->dst_mask) | (((x & howto->src_mask) + diff) & howto->dst_mask)) 140 141 if (diff != 0) 142 { 143 reloc_howto_type *howto = reloc_entry->howto; 144 unsigned char *addr = (unsigned char *) data + reloc_entry->address; 145 146 /* FIXME: We do not have an end address for data, so we cannot 147 accurately range check any addresses computed against it. 148 cf: PR binutils/17512: file: 1085-1761-0.004. 149 For now we do the best that we can. */ 150 if (addr < (unsigned char *) data || addr > ((unsigned char *) data) + input_section->size) 151 { 152 bfd_set_error (bfd_error_bad_value); 153 return bfd_reloc_notsupported; 154 } 155 156 switch (howto->size) 157 { 158 case 0: 159 { 160 char x = bfd_get_8 (abfd, addr); 161 DOIT (x); 162 bfd_put_8 (abfd, x, addr); 163 } 164 break; 165 166 case 1: 167 { 168 short x = bfd_get_16 (abfd, addr); 169 DOIT (x); 170 bfd_put_16 (abfd, (bfd_vma) x, addr); 171 } 172 break; 173 174 case 2: 175 { 176 long x = bfd_get_32 (abfd, addr); 177 DOIT (x); 178 bfd_put_32 (abfd, (bfd_vma) x, addr); 179 } 180 break; 181 case 4: 182 { 183 long long x = bfd_get_64 (abfd, addr); 184 DOIT (x); 185 bfd_put_64 (abfd, (bfd_vma) x, addr); 186 } 187 break; 188 189 default: 190 bfd_set_error (bfd_error_bad_value); 191 return bfd_reloc_notsupported; 192 } 193 } 194 195 /* Now let bfd_perform_relocation finish everything up. */ 196 return bfd_reloc_continue; 197 } 198 199 #if defined(COFF_WITH_PE) 200 /* Return TRUE if this relocation should appear in the output .reloc 201 section. */ 202 203 static bfd_boolean 204 in_reloc_p (bfd *abfd ATTRIBUTE_UNUSED, reloc_howto_type *howto) 205 { 206 return ! howto->pc_relative && howto->type != R_AMD64_IMAGEBASE 207 && howto->type != R_AMD64_SECREL; 208 } 209 #endif /* COFF_WITH_PE */ 210 211 #ifndef PCRELOFFSET 212 #define PCRELOFFSET TRUE 213 #endif 214 215 static reloc_howto_type howto_table[] = 216 { 217 EMPTY_HOWTO (0), 218 HOWTO (R_AMD64_DIR64, /* type 1*/ 219 0, /* rightshift */ 220 4, /* size (0 = byte, 1 = short, 2 = long, 4 = long long) */ 221 64, /* bitsize */ 222 FALSE, /* pc_relative */ 223 0, /* bitpos */ 224 complain_overflow_bitfield, /* complain_on_overflow */ 225 coff_amd64_reloc, /* special_function */ 226 "R_X86_64_64", /* name */ 227 TRUE, /* partial_inplace */ 228 0xffffffffffffffffll, /* src_mask */ 229 0xffffffffffffffffll, /* dst_mask */ 230 TRUE), /* pcrel_offset */ 231 HOWTO (R_AMD64_DIR32, /* type 2 */ 232 0, /* rightshift */ 233 2, /* size (0 = byte, 1 = short, 2 = long) */ 234 32, /* bitsize */ 235 FALSE, /* pc_relative */ 236 0, /* bitpos */ 237 complain_overflow_bitfield, /* complain_on_overflow */ 238 coff_amd64_reloc, /* special_function */ 239 "R_X86_64_32", /* name */ 240 TRUE, /* partial_inplace */ 241 0xffffffff, /* src_mask */ 242 0xffffffff, /* dst_mask */ 243 TRUE), /* pcrel_offset */ 244 /* PE IMAGE_REL_AMD64_ADDR32NB relocation (3). */ 245 HOWTO (R_AMD64_IMAGEBASE, /* type */ 246 0, /* rightshift */ 247 2, /* size (0 = byte, 1 = short, 2 = long) */ 248 32, /* bitsize */ 249 FALSE, /* pc_relative */ 250 0, /* bitpos */ 251 complain_overflow_bitfield, /* complain_on_overflow */ 252 coff_amd64_reloc, /* special_function */ 253 "rva32", /* name */ 254 TRUE, /* partial_inplace */ 255 0xffffffff, /* src_mask */ 256 0xffffffff, /* dst_mask */ 257 FALSE), /* pcrel_offset */ 258 /* 32-bit longword PC relative relocation (4). */ 259 HOWTO (R_AMD64_PCRLONG, /* type 4 */ 260 0, /* rightshift */ 261 2, /* size (0 = byte, 1 = short, 2 = long) */ 262 32, /* bitsize */ 263 TRUE, /* pc_relative */ 264 0, /* bitpos */ 265 complain_overflow_signed, /* complain_on_overflow */ 266 coff_amd64_reloc, /* special_function */ 267 "R_X86_64_PC32", /* name */ 268 TRUE, /* partial_inplace */ 269 0xffffffff, /* src_mask */ 270 0xffffffff, /* dst_mask */ 271 PCRELOFFSET), /* pcrel_offset */ 272 273 HOWTO (R_AMD64_PCRLONG_1, /* type 5 */ 274 0, /* rightshift */ 275 2, /* size (0 = byte, 1 = short, 2 = long) */ 276 32, /* bitsize */ 277 TRUE, /* pc_relative */ 278 0, /* bitpos */ 279 complain_overflow_signed, /* complain_on_overflow */ 280 coff_amd64_reloc, /* special_function */ 281 "DISP32+1", /* name */ 282 TRUE, /* partial_inplace */ 283 0xffffffff, /* src_mask */ 284 0xffffffff, /* dst_mask */ 285 PCRELOFFSET), /* pcrel_offset */ 286 HOWTO (R_AMD64_PCRLONG_2, /* type 6 */ 287 0, /* rightshift */ 288 2, /* size (0 = byte, 1 = short, 2 = long) */ 289 32, /* bitsize */ 290 TRUE, /* pc_relative */ 291 0, /* bitpos */ 292 complain_overflow_signed, /* complain_on_overflow */ 293 coff_amd64_reloc, /* special_function */ 294 "DISP32+2", /* name */ 295 TRUE, /* partial_inplace */ 296 0xffffffff, /* src_mask */ 297 0xffffffff, /* dst_mask */ 298 PCRELOFFSET), /* pcrel_offset */ 299 HOWTO (R_AMD64_PCRLONG_3, /* type 7 */ 300 0, /* rightshift */ 301 2, /* size (0 = byte, 1 = short, 2 = long) */ 302 32, /* bitsize */ 303 TRUE, /* pc_relative */ 304 0, /* bitpos */ 305 complain_overflow_signed, /* complain_on_overflow */ 306 coff_amd64_reloc, /* special_function */ 307 "DISP32+3", /* name */ 308 TRUE, /* partial_inplace */ 309 0xffffffff, /* src_mask */ 310 0xffffffff, /* dst_mask */ 311 PCRELOFFSET), /* pcrel_offset */ 312 HOWTO (R_AMD64_PCRLONG_4, /* type 8 */ 313 0, /* rightshift */ 314 2, /* size (0 = byte, 1 = short, 2 = long) */ 315 32, /* bitsize */ 316 TRUE, /* pc_relative */ 317 0, /* bitpos */ 318 complain_overflow_signed, /* complain_on_overflow */ 319 coff_amd64_reloc, /* special_function */ 320 "DISP32+4", /* name */ 321 TRUE, /* partial_inplace */ 322 0xffffffff, /* src_mask */ 323 0xffffffff, /* dst_mask */ 324 PCRELOFFSET), /* pcrel_offset */ 325 HOWTO (R_AMD64_PCRLONG_5, /* type 9 */ 326 0, /* rightshift */ 327 2, /* size (0 = byte, 1 = short, 2 = long) */ 328 32, /* bitsize */ 329 TRUE, /* pc_relative */ 330 0, /* bitpos */ 331 complain_overflow_signed, /* complain_on_overflow */ 332 coff_amd64_reloc, /* special_function */ 333 "DISP32+5", /* name */ 334 TRUE, /* partial_inplace */ 335 0xffffffff, /* src_mask */ 336 0xffffffff, /* dst_mask */ 337 PCRELOFFSET), /* pcrel_offset */ 338 EMPTY_HOWTO (10), /* R_AMD64_SECTION 10 */ 339 #if defined(COFF_WITH_PE) 340 /* 32-bit longword section relative relocation (11). */ 341 HOWTO (R_AMD64_SECREL, /* type */ 342 0, /* rightshift */ 343 2, /* size (0 = byte, 1 = short, 2 = long) */ 344 32, /* bitsize */ 345 FALSE, /* pc_relative */ 346 0, /* bitpos */ 347 complain_overflow_bitfield, /* complain_on_overflow */ 348 coff_amd64_reloc, /* special_function */ 349 "secrel32", /* name */ 350 TRUE, /* partial_inplace */ 351 0xffffffff, /* src_mask */ 352 0xffffffff, /* dst_mask */ 353 TRUE), /* pcrel_offset */ 354 #else 355 EMPTY_HOWTO (11), 356 #endif 357 EMPTY_HOWTO (12), 358 EMPTY_HOWTO (13), 359 #ifndef DONT_EXTEND_AMD64 360 HOWTO (R_AMD64_PCRQUAD, 361 0, /* rightshift */ 362 4, /* size (0 = byte, 1 = short, 2 = long) */ 363 64, /* bitsize */ 364 TRUE, /* pc_relative */ 365 0, /* bitpos */ 366 complain_overflow_signed, /* complain_on_overflow */ 367 coff_amd64_reloc, /* special_function */ 368 "R_X86_64_PC64", /* name */ 369 TRUE, /* partial_inplace */ 370 0xffffffffffffffffll, /* src_mask */ 371 0xffffffffffffffffll, /* dst_mask */ 372 PCRELOFFSET), /* pcrel_offset */ 373 #else 374 EMPTY_HOWTO (14), 375 #endif 376 /* Byte relocation (15). */ 377 HOWTO (R_RELBYTE, /* type */ 378 0, /* rightshift */ 379 0, /* size (0 = byte, 1 = short, 2 = long) */ 380 8, /* bitsize */ 381 FALSE, /* pc_relative */ 382 0, /* bitpos */ 383 complain_overflow_bitfield, /* complain_on_overflow */ 384 coff_amd64_reloc, /* special_function */ 385 "R_X86_64_8", /* name */ 386 TRUE, /* partial_inplace */ 387 0x000000ff, /* src_mask */ 388 0x000000ff, /* dst_mask */ 389 PCRELOFFSET), /* pcrel_offset */ 390 /* 16-bit word relocation (16). */ 391 HOWTO (R_RELWORD, /* type */ 392 0, /* rightshift */ 393 1, /* size (0 = byte, 1 = short, 2 = long) */ 394 16, /* bitsize */ 395 FALSE, /* pc_relative */ 396 0, /* bitpos */ 397 complain_overflow_bitfield, /* complain_on_overflow */ 398 coff_amd64_reloc, /* special_function */ 399 "R_X86_64_16", /* name */ 400 TRUE, /* partial_inplace */ 401 0x0000ffff, /* src_mask */ 402 0x0000ffff, /* dst_mask */ 403 PCRELOFFSET), /* pcrel_offset */ 404 /* 32-bit longword relocation (17). */ 405 HOWTO (R_RELLONG, /* type */ 406 0, /* rightshift */ 407 2, /* size (0 = byte, 1 = short, 2 = long) */ 408 32, /* bitsize */ 409 FALSE, /* pc_relative */ 410 0, /* bitpos */ 411 complain_overflow_bitfield, /* complain_on_overflow */ 412 coff_amd64_reloc, /* special_function */ 413 "R_X86_64_32S", /* name */ 414 TRUE, /* partial_inplace */ 415 0xffffffff, /* src_mask */ 416 0xffffffff, /* dst_mask */ 417 PCRELOFFSET), /* pcrel_offset */ 418 /* Byte PC relative relocation (18). */ 419 HOWTO (R_PCRBYTE, /* type */ 420 0, /* rightshift */ 421 0, /* size (0 = byte, 1 = short, 2 = long) */ 422 8, /* bitsize */ 423 TRUE, /* pc_relative */ 424 0, /* bitpos */ 425 complain_overflow_signed, /* complain_on_overflow */ 426 coff_amd64_reloc, /* special_function */ 427 "R_X86_64_PC8", /* name */ 428 TRUE, /* partial_inplace */ 429 0x000000ff, /* src_mask */ 430 0x000000ff, /* dst_mask */ 431 PCRELOFFSET), /* pcrel_offset */ 432 /* 16-bit word PC relative relocation (19). */ 433 HOWTO (R_PCRWORD, /* type */ 434 0, /* rightshift */ 435 1, /* size (0 = byte, 1 = short, 2 = long) */ 436 16, /* bitsize */ 437 TRUE, /* pc_relative */ 438 0, /* bitpos */ 439 complain_overflow_signed, /* complain_on_overflow */ 440 coff_amd64_reloc, /* special_function */ 441 "R_X86_64_PC16", /* name */ 442 TRUE, /* partial_inplace */ 443 0x0000ffff, /* src_mask */ 444 0x0000ffff, /* dst_mask */ 445 PCRELOFFSET), /* pcrel_offset */ 446 /* 32-bit longword PC relative relocation (20). */ 447 HOWTO (R_PCRLONG, /* type */ 448 0, /* rightshift */ 449 2, /* size (0 = byte, 1 = short, 2 = long) */ 450 32, /* bitsize */ 451 TRUE, /* pc_relative */ 452 0, /* bitpos */ 453 complain_overflow_signed, /* complain_on_overflow */ 454 coff_amd64_reloc, /* special_function */ 455 "R_X86_64_PC32", /* name */ 456 TRUE, /* partial_inplace */ 457 0xffffffff, /* src_mask */ 458 0xffffffff, /* dst_mask */ 459 PCRELOFFSET) /* pcrel_offset */ 460 }; 461 462 #define NUM_HOWTOS ARRAY_SIZE (howto_table) 463 464 /* Turn a howto into a reloc nunmber */ 465 466 #define SELECT_RELOC(x,howto) { x.r_type = howto->type; } 467 #define I386 1 /* Customize coffcode.h */ 468 #define AMD64 1 469 470 #define RTYPE2HOWTO(cache_ptr, dst) \ 471 ((cache_ptr)->howto = \ 472 ((dst)->r_type < NUM_HOWTOS) \ 473 ? howto_table + (dst)->r_type \ 474 : NULL) 475 476 /* For 386 COFF a STYP_NOLOAD | STYP_BSS section is part of a shared 477 library. On some other COFF targets STYP_BSS is normally 478 STYP_NOLOAD. */ 479 #define BSS_NOLOAD_IS_SHARED_LIBRARY 480 481 /* Compute the addend of a reloc. If the reloc is to a common symbol, 482 the object file contains the value of the common symbol. By the 483 time this is called, the linker may be using a different symbol 484 from a different object file with a different value. Therefore, we 485 hack wildly to locate the original symbol from this file so that we 486 can make the correct adjustment. This macro sets coffsym to the 487 symbol from the original file, and uses it to set the addend value 488 correctly. If this is not a common symbol, the usual addend 489 calculation is done, except that an additional tweak is needed for 490 PC relative relocs. 491 FIXME: This macro refers to symbols and asect; these are from the 492 calling function, not the macro arguments. */ 493 494 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \ 495 { \ 496 coff_symbol_type *coffsym = NULL; \ 497 \ 498 if (ptr && bfd_asymbol_bfd (ptr) != abfd) \ 499 coffsym = (obj_symbols (abfd) \ 500 + (cache_ptr->sym_ptr_ptr - symbols)); \ 501 else if (ptr) \ 502 coffsym = coff_symbol_from (ptr); \ 503 \ 504 if (coffsym != NULL \ 505 && coffsym->native->u.syment.n_scnum == 0) \ 506 cache_ptr->addend = - coffsym->native->u.syment.n_value; \ 507 else if (ptr && bfd_asymbol_bfd (ptr) == abfd \ 508 && ptr->section != NULL) \ 509 cache_ptr->addend = - (ptr->section->vma + ptr->value); \ 510 else \ 511 cache_ptr->addend = 0; \ 512 if (ptr && reloc.r_type < NUM_HOWTOS \ 513 && howto_table[reloc.r_type].pc_relative) \ 514 cache_ptr->addend += asect->vma; \ 515 } 516 517 /* We use the special COFF backend linker. For normal AMD64 COFF, we 518 can use the generic relocate_section routine. For PE, we need our 519 own routine. */ 520 521 #if !defined(COFF_WITH_PE) 522 523 #define coff_relocate_section _bfd_coff_generic_relocate_section 524 525 #else /* COFF_WITH_PE */ 526 527 /* The PE relocate section routine. The only difference between this 528 and the regular routine is that we don't want to do anything for a 529 relocatable link. */ 530 531 static bfd_boolean 532 coff_pe_amd64_relocate_section (bfd *output_bfd, 533 struct bfd_link_info *info, 534 bfd *input_bfd, 535 asection *input_section, 536 bfd_byte *contents, 537 struct internal_reloc *relocs, 538 struct internal_syment *syms, 539 asection **sections) 540 { 541 if (info->relocatable) 542 return TRUE; 543 544 return _bfd_coff_generic_relocate_section (output_bfd, info, input_bfd,input_section, contents,relocs, syms, sections); 545 } 546 547 #define coff_relocate_section coff_pe_amd64_relocate_section 548 549 #endif /* COFF_WITH_PE */ 550 551 /* Convert an rtype to howto for the COFF backend linker. */ 552 553 static reloc_howto_type * 554 coff_amd64_rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED, 555 asection *sec, 556 struct internal_reloc *rel, 557 struct coff_link_hash_entry *h, 558 struct internal_syment *sym, 559 bfd_vma *addendp) 560 { 561 reloc_howto_type *howto; 562 563 if (rel->r_type >= NUM_HOWTOS) 564 { 565 bfd_set_error (bfd_error_bad_value); 566 return NULL; 567 } 568 howto = howto_table + rel->r_type; 569 570 #if defined(COFF_WITH_PE) 571 /* Cancel out code in _bfd_coff_generic_relocate_section. */ 572 *addendp = 0; 573 if (rel->r_type >= R_AMD64_PCRLONG_1 && rel->r_type <= R_AMD64_PCRLONG_5) 574 { 575 *addendp -= (bfd_vma)(rel->r_type - R_AMD64_PCRLONG); 576 rel->r_type = R_AMD64_PCRLONG; 577 } 578 #endif 579 580 if (howto->pc_relative) 581 *addendp += sec->vma; 582 583 if (sym != NULL && sym->n_scnum == 0 && sym->n_value != 0) 584 { 585 /* This is a common symbol. The section contents include the 586 size (sym->n_value) as an addend. The relocate_section 587 function will be adding in the final value of the symbol. We 588 need to subtract out the current size in order to get the 589 correct result. */ 590 BFD_ASSERT (h != NULL); 591 592 #if !defined(COFF_WITH_PE) 593 /* I think we *do* want to bypass this. If we don't, I have 594 seen some data parameters get the wrong relocation address. 595 If I link two versions with and without this section bypassed 596 and then do a binary comparison, the addresses which are 597 different can be looked up in the map. The case in which 598 this section has been bypassed has addresses which correspond 599 to values I can find in the map. */ 600 *addendp -= sym->n_value; 601 #endif 602 } 603 604 #if !defined(COFF_WITH_PE) 605 /* If the output symbol is common (in which case this must be a 606 relocatable link), we need to add in the final size of the 607 common symbol. */ 608 if (h != NULL && h->root.type == bfd_link_hash_common) 609 *addendp += h->root.u.c.size; 610 #endif 611 612 #if defined(COFF_WITH_PE) 613 if (howto->pc_relative) 614 { 615 *addendp -= 4; 616 617 /* If the symbol is defined, then the generic code is going to 618 add back the symbol value in order to cancel out an 619 adjustment it made to the addend. However, we set the addend 620 to 0 at the start of this function. We need to adjust here, 621 to avoid the adjustment the generic code will make. FIXME: 622 This is getting a bit hackish. */ 623 if (sym != NULL && sym->n_scnum != 0) 624 *addendp -= sym->n_value; 625 } 626 627 if (rel->r_type == R_AMD64_IMAGEBASE 628 && (bfd_get_flavour (sec->output_section->owner) == bfd_target_coff_flavour)) 629 *addendp -= pe_data (sec->output_section->owner)->pe_opthdr.ImageBase; 630 631 if (rel->r_type == R_AMD64_SECREL) 632 { 633 bfd_vma osect_vma; 634 635 if (h && (h->root.type == bfd_link_hash_defined 636 || h->root.type == bfd_link_hash_defweak)) 637 osect_vma = h->root.u.def.section->output_section->vma; 638 else 639 { 640 asection *s; 641 int i; 642 643 /* Sigh, the only way to get the section to offset against 644 is to find it the hard way. */ 645 for (s = abfd->sections, i = 1; i < sym->n_scnum; i++) 646 s = s->next; 647 648 osect_vma = s->output_section->vma; 649 } 650 651 *addendp -= osect_vma; 652 } 653 #endif 654 655 return howto; 656 } 657 658 #define coff_bfd_reloc_type_lookup coff_amd64_reloc_type_lookup 659 #define coff_bfd_reloc_name_lookup coff_amd64_reloc_name_lookup 660 661 static reloc_howto_type * 662 coff_amd64_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code) 663 { 664 switch (code) 665 { 666 case BFD_RELOC_RVA: 667 return howto_table + R_AMD64_IMAGEBASE; 668 case BFD_RELOC_32: 669 return howto_table + R_AMD64_DIR32; 670 case BFD_RELOC_64: 671 return howto_table + R_AMD64_DIR64; 672 case BFD_RELOC_64_PCREL: 673 #ifndef DONT_EXTEND_AMD64 674 return howto_table + R_AMD64_PCRQUAD; 675 #else 676 /* Fall through. */ 677 #endif 678 case BFD_RELOC_32_PCREL: 679 return howto_table + R_AMD64_PCRLONG; 680 case BFD_RELOC_X86_64_32S: 681 return howto_table + R_RELLONG; 682 case BFD_RELOC_16: 683 return howto_table + R_RELWORD; 684 case BFD_RELOC_16_PCREL: 685 return howto_table + R_PCRWORD; 686 case BFD_RELOC_8: 687 return howto_table + R_RELBYTE; 688 case BFD_RELOC_8_PCREL: 689 return howto_table + R_PCRBYTE; 690 #if defined(COFF_WITH_PE) 691 case BFD_RELOC_32_SECREL: 692 return howto_table + R_AMD64_SECREL; 693 #endif 694 default: 695 BFD_FAIL (); 696 return 0; 697 } 698 } 699 700 static reloc_howto_type * 701 coff_amd64_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 702 const char *r_name) 703 { 704 unsigned int i; 705 706 for (i = 0; i < NUM_HOWTOS; i++) 707 if (howto_table[i].name != NULL 708 && strcasecmp (howto_table[i].name, r_name) == 0) 709 return &howto_table[i]; 710 711 return NULL; 712 } 713 714 #define coff_rtype_to_howto coff_amd64_rtype_to_howto 715 716 #ifdef TARGET_UNDERSCORE 717 718 /* If amd64 gcc uses underscores for symbol names, then it does not use 719 a leading dot for local labels, so if TARGET_UNDERSCORE is defined 720 we treat all symbols starting with L as local. */ 721 722 static bfd_boolean 723 coff_amd64_is_local_label_name (bfd *abfd, const char *name) 724 { 725 if (name[0] == 'L') 726 return TRUE; 727 728 return _bfd_coff_is_local_label_name (abfd, name); 729 } 730 731 #define coff_bfd_is_local_label_name coff_amd64_is_local_label_name 732 733 #endif /* TARGET_UNDERSCORE */ 734 735 #ifndef bfd_pe_print_pdata 736 #define bfd_pe_print_pdata NULL 737 #endif 738 739 #include "coffcode.h" 740 741 #ifdef PE 742 #define amd64coff_object_p pe_bfd_object_p 743 #else 744 #define amd64coff_object_p coff_object_p 745 #endif 746 747 const bfd_target 748 #ifdef TARGET_SYM 749 TARGET_SYM = 750 #else 751 x86_64_coff_vec = 752 #endif 753 { 754 #ifdef TARGET_NAME 755 TARGET_NAME, 756 #else 757 "coff-x86-64", /* Name. */ 758 #endif 759 bfd_target_coff_flavour, 760 BFD_ENDIAN_LITTLE, /* Data byte order is little. */ 761 BFD_ENDIAN_LITTLE, /* Header byte order is little. */ 762 763 (HAS_RELOC | EXEC_P | /* Object flags. */ 764 HAS_LINENO | HAS_DEBUG | 765 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED | BFD_COMPRESS | BFD_DECOMPRESS), 766 767 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* Section flags. */ 768 #if defined(COFF_WITH_PE) 769 | SEC_LINK_ONCE | SEC_LINK_DUPLICATES | SEC_READONLY | SEC_DEBUGGING 770 #endif 771 | SEC_CODE | SEC_DATA | SEC_EXCLUDE ), 772 773 #ifdef TARGET_UNDERSCORE 774 TARGET_UNDERSCORE, /* Leading underscore. */ 775 #else 776 0, /* Leading underscore. */ 777 #endif 778 '/', /* Ar_pad_char. */ 779 15, /* Ar_max_namelen. */ 780 0, /* match priority. */ 781 782 bfd_getl64, bfd_getl_signed_64, bfd_putl64, 783 bfd_getl32, bfd_getl_signed_32, bfd_putl32, 784 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Data. */ 785 bfd_getl64, bfd_getl_signed_64, bfd_putl64, 786 bfd_getl32, bfd_getl_signed_32, bfd_putl32, 787 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Hdrs. */ 788 789 /* Note that we allow an object file to be treated as a core file as well. */ 790 { _bfd_dummy_target, amd64coff_object_p, /* BFD_check_format. */ 791 bfd_generic_archive_p, amd64coff_object_p }, 792 { bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format. */ 793 bfd_false }, 794 { bfd_false, coff_write_object_contents, /* bfd_write_contents. */ 795 _bfd_write_archive_contents, bfd_false }, 796 797 BFD_JUMP_TABLE_GENERIC (coff), 798 BFD_JUMP_TABLE_COPY (coff), 799 BFD_JUMP_TABLE_CORE (_bfd_nocore), 800 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), 801 BFD_JUMP_TABLE_SYMBOLS (coff), 802 BFD_JUMP_TABLE_RELOCS (coff), 803 BFD_JUMP_TABLE_WRITE (coff), 804 BFD_JUMP_TABLE_LINK (coff), 805 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), 806 807 NULL, 808 809 COFF_SWAP_TABLE 810 }; 811