coff-x86_64.c revision 218822
1/* BFD back-end for AMD 64 COFF files. 2 Copyright 2006, 2007 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 2 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, MA 02110-1301, USA. 19 20 Written by Kai Tietz, OneVision Software GmbH&CoKg. */ 21 22#ifndef COFF_WITH_pex64 23#define COFF_WITH_pex64 24#endif 25 26#include "sysdep.h" 27#include "bfd.h" 28#include "libbfd.h" 29#include "coff/x86_64.h" 30#include "coff/internal.h" 31#include "coff/pe.h" 32#include "libcoff.h" 33#include "libiberty.h" 34 35#define BADMAG(x) AMD64BADMAG(x) 36 37#ifdef COFF_WITH_pex64 38# undef AOUTSZ 39# define AOUTSZ PEPAOUTSZ 40# define PEAOUTHDR PEPAOUTHDR 41#endif 42 43#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2) 44 45/* The page size is a guess based on ELF. */ 46 47#define COFF_PAGE_SIZE 0x1000 48 49/* For some reason when using AMD COFF the value stored in the .text 50 section for a reference to a common symbol is the value itself plus 51 any desired offset. Ian Taylor, Cygnus Support. */ 52 53/* If we are producing relocatable output, we need to do some 54 adjustments to the object file that are not done by the 55 bfd_perform_relocation function. This function is called by every 56 reloc type to make any required adjustments. */ 57 58static bfd_reloc_status_type 59coff_amd64_reloc (bfd *abfd, 60 arelent *reloc_entry, 61 asymbol *symbol, 62 void * data, 63 asection *input_section ATTRIBUTE_UNUSED, 64 bfd *output_bfd, 65 char **error_message ATTRIBUTE_UNUSED) 66{ 67 symvalue diff; 68 69#if !defined(COFF_WITH_PE) 70 if (output_bfd == NULL) 71 return bfd_reloc_continue; 72#endif 73 74 if (bfd_is_com_section (symbol->section)) 75 { 76#if !defined(COFF_WITH_PE) 77 /* We are relocating a common symbol. The current value in the 78 object file is ORIG + OFFSET, where ORIG is the value of the 79 common symbol as seen by the object file when it was compiled 80 (this may be zero if the symbol was undefined) and OFFSET is 81 the offset into the common symbol (normally zero, but may be 82 non-zero when referring to a field in a common structure). 83 ORIG is the negative of reloc_entry->addend, which is set by 84 the CALC_ADDEND macro below. We want to replace the value in 85 the object file with NEW + OFFSET, where NEW is the value of 86 the common symbol which we are going to put in the final 87 object file. NEW is symbol->value. */ 88 diff = symbol->value + reloc_entry->addend; 89#else 90 /* In PE mode, we do not offset the common symbol. */ 91 diff = reloc_entry->addend; 92#endif 93 } 94 else 95 { 96 /* For some reason bfd_perform_relocation always effectively 97 ignores the addend for a COFF target when producing 98 relocatable output. This seems to be always wrong for 386 99 COFF, so we handle the addend here instead. */ 100#if defined(COFF_WITH_PE) 101 if (output_bfd == NULL) 102 { 103 reloc_howto_type *howto = reloc_entry->howto; 104 105 /* Although PC relative relocations are very similar between 106 PE and non-PE formats, but they are off by 1 << howto->size 107 bytes. For the external relocation, PE is very different 108 from others. See md_apply_fix3 () in gas/config/tc-amd64.c. 109 When we link PE and non-PE object files together to 110 generate a non-PE executable, we have to compensate it 111 here. */ 112 if(howto->pc_relative && howto->pcrel_offset) 113 diff = -(1 << howto->size); 114 else if(symbol->flags & BSF_WEAK) 115 diff = reloc_entry->addend - symbol->value; 116 else 117 diff = -reloc_entry->addend; 118 } 119 else 120#endif 121 diff = reloc_entry->addend; 122 } 123 124#if defined(COFF_WITH_PE) 125 /* FIXME: How should this case be handled? */ 126 if (reloc_entry->howto->type == R_AMD64_IMAGEBASE 127 && output_bfd != NULL 128 && bfd_get_flavour (output_bfd) == bfd_target_coff_flavour) 129 diff -= pe_data (output_bfd)->pe_opthdr.ImageBase; 130#endif 131 132#define DOIT(x) \ 133 x = ((x & ~howto->dst_mask) | (((x & howto->src_mask) + diff) & howto->dst_mask)) 134 135 if (diff != 0) 136 { 137 reloc_howto_type *howto = reloc_entry->howto; 138 unsigned char *addr = (unsigned char *) data + reloc_entry->address; 139 140 switch (howto->size) 141 { 142 case 0: 143 { 144 char x = bfd_get_8 (abfd, addr); 145 DOIT (x); 146 bfd_put_8 (abfd, x, addr); 147 } 148 break; 149 150 case 1: 151 { 152 short x = bfd_get_16 (abfd, addr); 153 DOIT (x); 154 bfd_put_16 (abfd, (bfd_vma) x, addr); 155 } 156 break; 157 158 case 2: 159 { 160 long x = bfd_get_32 (abfd, addr); 161 DOIT (x); 162 bfd_put_32 (abfd, (bfd_vma) x, addr); 163 } 164 break; 165 case 4: 166 { 167 long long x = bfd_get_64 (abfd, addr); 168 DOIT (x); 169 bfd_put_64 (abfd, (bfd_vma) x, addr); 170 } 171 break; 172 173 default: 174 abort (); 175 } 176 } 177 178 /* Now let bfd_perform_relocation finish everything up. */ 179 return bfd_reloc_continue; 180} 181 182#if defined(COFF_WITH_PE) 183/* Return TRUE if this relocation should appear in the output .reloc 184 section. */ 185 186static bfd_boolean 187in_reloc_p (bfd *abfd ATTRIBUTE_UNUSED, reloc_howto_type *howto) 188{ 189 return ! howto->pc_relative && howto->type != R_AMD64_IMAGEBASE; 190} 191#endif /* COFF_WITH_PE */ 192 193#ifndef PCRELOFFSET 194#define PCRELOFFSET TRUE 195#endif 196 197static reloc_howto_type howto_table[] = 198{ 199 EMPTY_HOWTO (0), 200 HOWTO (R_AMD64_DIR64, /* type 1*/ 201 0, /* rightshift */ 202 4, /* size (0 = byte, 1 = short, 2 = long, 4 = long long) */ 203 64, /* bitsize */ 204 FALSE, /* pc_relative */ 205 0, /* bitpos */ 206 complain_overflow_bitfield, /* complain_on_overflow */ 207 coff_amd64_reloc, /* special_function */ 208 "R_X86_64_64", /* name */ 209 TRUE, /* partial_inplace */ 210 0xffffffffffffffffll, /* src_mask */ 211 0xffffffffffffffffll, /* dst_mask */ 212 TRUE), /* pcrel_offset */ 213 HOWTO (R_AMD64_DIR32, /* type 2 */ 214 0, /* rightshift */ 215 2, /* size (0 = byte, 1 = short, 2 = long) */ 216 32, /* bitsize */ 217 FALSE, /* pc_relative */ 218 0, /* bitpos */ 219 complain_overflow_bitfield, /* complain_on_overflow */ 220 coff_amd64_reloc, /* special_function */ 221 "R_X86_64_32", /* name */ 222 TRUE, /* partial_inplace */ 223 0xffffffff, /* src_mask */ 224 0xffffffff, /* dst_mask */ 225 TRUE), /* pcrel_offset */ 226 /* PE IMAGE_REL_AMD64_ADDR32NB relocation (3). */ 227 HOWTO (R_AMD64_IMAGEBASE, /* type */ 228 0, /* rightshift */ 229 2, /* size (0 = byte, 1 = short, 2 = long) */ 230 32, /* bitsize */ 231 FALSE, /* pc_relative */ 232 0, /* bitpos */ 233 complain_overflow_bitfield, /* complain_on_overflow */ 234 coff_amd64_reloc, /* special_function */ 235 "rva32", /* name */ 236 TRUE, /* partial_inplace */ 237 0xffffffff, /* src_mask */ 238 0xffffffff, /* dst_mask */ 239 FALSE), /* pcrel_offset */ 240 /* 32-bit longword PC relative relocation (4). */ 241 HOWTO (R_AMD64_PCRLONG, /* type 4 */ 242 0, /* rightshift */ 243 2, /* size (0 = byte, 1 = short, 2 = long) */ 244 32, /* bitsize */ 245 TRUE, /* pc_relative */ 246 0, /* bitpos */ 247 complain_overflow_signed, /* complain_on_overflow */ 248 coff_amd64_reloc, /* special_function */ 249 "R_X86_64_PC32", /* name */ 250 TRUE, /* partial_inplace */ 251 0xffffffff, /* src_mask */ 252 0xffffffff, /* dst_mask */ 253 PCRELOFFSET), /* pcrel_offset */ 254 255 HOWTO (R_AMD64_PCRLONG_1, /* type 5 */ 256 0, /* rightshift */ 257 2, /* size (0 = byte, 1 = short, 2 = long) */ 258 32, /* bitsize */ 259 TRUE, /* pc_relative */ 260 0, /* bitpos */ 261 complain_overflow_signed, /* complain_on_overflow */ 262 coff_amd64_reloc, /* special_function */ 263 "DISP32+1", /* name */ 264 TRUE, /* partial_inplace */ 265 0xffffffff, /* src_mask */ 266 0xffffffff, /* dst_mask */ 267 PCRELOFFSET), /* pcrel_offset */ 268 HOWTO (R_AMD64_PCRLONG_2, /* type 6 */ 269 0, /* rightshift */ 270 2, /* size (0 = byte, 1 = short, 2 = long) */ 271 32, /* bitsize */ 272 TRUE, /* pc_relative */ 273 0, /* bitpos */ 274 complain_overflow_signed, /* complain_on_overflow */ 275 coff_amd64_reloc, /* special_function */ 276 "DISP32+2", /* name */ 277 TRUE, /* partial_inplace */ 278 0xffffffff, /* src_mask */ 279 0xffffffff, /* dst_mask */ 280 PCRELOFFSET), /* pcrel_offset */ 281 HOWTO (R_AMD64_PCRLONG_3, /* type 7 */ 282 0, /* rightshift */ 283 2, /* size (0 = byte, 1 = short, 2 = long) */ 284 32, /* bitsize */ 285 TRUE, /* pc_relative */ 286 0, /* bitpos */ 287 complain_overflow_signed, /* complain_on_overflow */ 288 coff_amd64_reloc, /* special_function */ 289 "DISP32+3", /* name */ 290 TRUE, /* partial_inplace */ 291 0xffffffff, /* src_mask */ 292 0xffffffff, /* dst_mask */ 293 PCRELOFFSET), /* pcrel_offset */ 294 HOWTO (R_AMD64_PCRLONG_4, /* type 8 */ 295 0, /* rightshift */ 296 2, /* size (0 = byte, 1 = short, 2 = long) */ 297 32, /* bitsize */ 298 TRUE, /* pc_relative */ 299 0, /* bitpos */ 300 complain_overflow_signed, /* complain_on_overflow */ 301 coff_amd64_reloc, /* special_function */ 302 "DISP32+4", /* name */ 303 TRUE, /* partial_inplace */ 304 0xffffffff, /* src_mask */ 305 0xffffffff, /* dst_mask */ 306 PCRELOFFSET), /* pcrel_offset */ 307 HOWTO (R_AMD64_PCRLONG_5, /* type 9 */ 308 0, /* rightshift */ 309 2, /* size (0 = byte, 1 = short, 2 = long) */ 310 32, /* bitsize */ 311 TRUE, /* pc_relative */ 312 0, /* bitpos */ 313 complain_overflow_signed, /* complain_on_overflow */ 314 coff_amd64_reloc, /* special_function */ 315 "DISP32+5", /* name */ 316 TRUE, /* partial_inplace */ 317 0xffffffff, /* src_mask */ 318 0xffffffff, /* dst_mask */ 319 PCRELOFFSET), /* pcrel_offset */ 320 EMPTY_HOWTO (10), /* R_AMD64_SECTION 10 */ 321#if defined(COFF_WITH_PE) 322 /* 32-bit longword section relative relocation (11). */ 323 HOWTO (R_AMD64_SECREL, /* type */ 324 0, /* rightshift */ 325 2, /* size (0 = byte, 1 = short, 2 = long) */ 326 32, /* bitsize */ 327 FALSE, /* pc_relative */ 328 0, /* bitpos */ 329 complain_overflow_bitfield, /* complain_on_overflow */ 330 coff_amd64_reloc, /* special_function */ 331 "secrel32", /* name */ 332 TRUE, /* partial_inplace */ 333 0xffffffff, /* src_mask */ 334 0xffffffff, /* dst_mask */ 335 TRUE), /* pcrel_offset */ 336#else 337 EMPTY_HOWTO (11), 338#endif 339 EMPTY_HOWTO (12), 340 EMPTY_HOWTO (13), 341#ifndef DONT_EXTEND_AMD64 342 HOWTO (R_AMD64_PCRQUAD, 343 0, /* rightshift */ 344 4, /* size (0 = byte, 1 = short, 2 = long) */ 345 64, /* bitsize */ 346 TRUE, /* pc_relative */ 347 0, /* bitpos */ 348 complain_overflow_signed, /* complain_on_overflow */ 349 coff_amd64_reloc, /* special_function */ 350 "R_X86_64_PC64", /* name */ 351 TRUE, /* partial_inplace */ 352 0xffffffffffffffffll, /* src_mask */ 353 0xffffffffffffffffll, /* dst_mask */ 354 PCRELOFFSET), /* pcrel_offset */ 355#else 356 EMPTY_HOWTO (14), 357#endif 358 /* Byte relocation (15). */ 359 HOWTO (R_RELBYTE, /* type */ 360 0, /* rightshift */ 361 0, /* size (0 = byte, 1 = short, 2 = long) */ 362 8, /* bitsize */ 363 FALSE, /* pc_relative */ 364 0, /* bitpos */ 365 complain_overflow_bitfield, /* complain_on_overflow */ 366 coff_amd64_reloc, /* special_function */ 367 "R_X86_64_8", /* name */ 368 TRUE, /* partial_inplace */ 369 0x000000ff, /* src_mask */ 370 0x000000ff, /* dst_mask */ 371 PCRELOFFSET), /* pcrel_offset */ 372 /* 16-bit word relocation (16). */ 373 HOWTO (R_RELWORD, /* type */ 374 0, /* rightshift */ 375 1, /* size (0 = byte, 1 = short, 2 = long) */ 376 16, /* bitsize */ 377 FALSE, /* pc_relative */ 378 0, /* bitpos */ 379 complain_overflow_bitfield, /* complain_on_overflow */ 380 coff_amd64_reloc, /* special_function */ 381 "R_X86_64_16", /* name */ 382 TRUE, /* partial_inplace */ 383 0x0000ffff, /* src_mask */ 384 0x0000ffff, /* dst_mask */ 385 PCRELOFFSET), /* pcrel_offset */ 386 /* 32-bit longword relocation (17). */ 387 HOWTO (R_RELLONG, /* type */ 388 0, /* rightshift */ 389 2, /* size (0 = byte, 1 = short, 2 = long) */ 390 32, /* bitsize */ 391 FALSE, /* pc_relative */ 392 0, /* bitpos */ 393 complain_overflow_bitfield, /* complain_on_overflow */ 394 coff_amd64_reloc, /* special_function */ 395 "R_X86_64_32S", /* name */ 396 TRUE, /* partial_inplace */ 397 0xffffffff, /* src_mask */ 398 0xffffffff, /* dst_mask */ 399 PCRELOFFSET), /* pcrel_offset */ 400 /* Byte PC relative relocation (18). */ 401 HOWTO (R_PCRBYTE, /* type */ 402 0, /* rightshift */ 403 0, /* size (0 = byte, 1 = short, 2 = long) */ 404 8, /* bitsize */ 405 TRUE, /* pc_relative */ 406 0, /* bitpos */ 407 complain_overflow_signed, /* complain_on_overflow */ 408 coff_amd64_reloc, /* special_function */ 409 "R_X86_64_PC8", /* name */ 410 TRUE, /* partial_inplace */ 411 0x000000ff, /* src_mask */ 412 0x000000ff, /* dst_mask */ 413 PCRELOFFSET), /* pcrel_offset */ 414 /* 16-bit word PC relative relocation (19). */ 415 HOWTO (R_PCRWORD, /* type */ 416 0, /* rightshift */ 417 1, /* size (0 = byte, 1 = short, 2 = long) */ 418 16, /* bitsize */ 419 TRUE, /* pc_relative */ 420 0, /* bitpos */ 421 complain_overflow_signed, /* complain_on_overflow */ 422 coff_amd64_reloc, /* special_function */ 423 "R_X86_64_PC16", /* name */ 424 TRUE, /* partial_inplace */ 425 0x0000ffff, /* src_mask */ 426 0x0000ffff, /* dst_mask */ 427 PCRELOFFSET), /* pcrel_offset */ 428 /* 32-bit longword PC relative relocation (20). */ 429 HOWTO (R_PCRLONG, /* type */ 430 0, /* rightshift */ 431 2, /* size (0 = byte, 1 = short, 2 = long) */ 432 32, /* bitsize */ 433 TRUE, /* pc_relative */ 434 0, /* bitpos */ 435 complain_overflow_signed, /* complain_on_overflow */ 436 coff_amd64_reloc, /* special_function */ 437 "R_X86_64_PC32", /* name */ 438 TRUE, /* partial_inplace */ 439 0xffffffff, /* src_mask */ 440 0xffffffff, /* dst_mask */ 441 PCRELOFFSET) /* pcrel_offset */ 442}; 443 444/* Turn a howto into a reloc nunmber */ 445 446#define SELECT_RELOC(x,howto) { x.r_type = howto->type; } 447#define I386 1 /* Customize coffcode.h */ 448#define AMD64 1 449 450#define RTYPE2HOWTO(cache_ptr, dst) \ 451 ((cache_ptr)->howto = \ 452 ((dst)->r_type < ARRAY_SIZE (howto_table)) \ 453 ? howto_table + (dst)->r_type \ 454 : NULL) 455 456/* For 386 COFF a STYP_NOLOAD | STYP_BSS section is part of a shared 457 library. On some other COFF targets STYP_BSS is normally 458 STYP_NOLOAD. */ 459#define BSS_NOLOAD_IS_SHARED_LIBRARY 460 461/* Compute the addend of a reloc. If the reloc is to a common symbol, 462 the object file contains the value of the common symbol. By the 463 time this is called, the linker may be using a different symbol 464 from a different object file with a different value. Therefore, we 465 hack wildly to locate the original symbol from this file so that we 466 can make the correct adjustment. This macro sets coffsym to the 467 symbol from the original file, and uses it to set the addend value 468 correctly. If this is not a common symbol, the usual addend 469 calculation is done, except that an additional tweak is needed for 470 PC relative relocs. 471 FIXME: This macro refers to symbols and asect; these are from the 472 calling function, not the macro arguments. */ 473 474#define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \ 475 { \ 476 coff_symbol_type *coffsym = NULL; \ 477 \ 478 if (ptr && bfd_asymbol_bfd (ptr) != abfd) \ 479 coffsym = (obj_symbols (abfd) \ 480 + (cache_ptr->sym_ptr_ptr - symbols)); \ 481 else if (ptr) \ 482 coffsym = coff_symbol_from (abfd, ptr); \ 483 \ 484 if (coffsym != NULL \ 485 && coffsym->native->u.syment.n_scnum == 0) \ 486 cache_ptr->addend = - coffsym->native->u.syment.n_value; \ 487 else if (ptr && bfd_asymbol_bfd (ptr) == abfd \ 488 && ptr->section != NULL) \ 489 cache_ptr->addend = - (ptr->section->vma + ptr->value); \ 490 else \ 491 cache_ptr->addend = 0; \ 492 if (ptr && howto_table[reloc.r_type].pc_relative) \ 493 cache_ptr->addend += asect->vma; \ 494 } 495 496/* We use the special COFF backend linker. For normal AMD64 COFF, we 497 can use the generic relocate_section routine. For PE, we need our 498 own routine. */ 499 500#if !defined(COFF_WITH_PE) 501 502#define coff_relocate_section _bfd_coff_generic_relocate_section 503 504#else /* COFF_WITH_PE */ 505 506/* The PE relocate section routine. The only difference between this 507 and the regular routine is that we don't want to do anything for a 508 relocatable link. */ 509 510static bfd_boolean 511coff_pe_amd64_relocate_section (bfd *output_bfd, 512 struct bfd_link_info *info, 513 bfd *input_bfd, 514 asection *input_section, 515 bfd_byte *contents, 516 struct internal_reloc *relocs, 517 struct internal_syment *syms, 518 asection **sections) 519{ 520 if (info->relocatable) 521 return TRUE; 522 523 return _bfd_coff_generic_relocate_section (output_bfd, info, input_bfd,input_section, contents,relocs, syms, sections); 524} 525 526#define coff_relocate_section coff_pe_amd64_relocate_section 527 528#endif /* COFF_WITH_PE */ 529 530/* Convert an rtype to howto for the COFF backend linker. */ 531 532static reloc_howto_type * 533coff_amd64_rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED, 534 asection *sec, 535 struct internal_reloc *rel, 536 struct coff_link_hash_entry *h, 537 struct internal_syment *sym, 538 bfd_vma *addendp) 539{ 540 reloc_howto_type *howto; 541 542 if (rel->r_type > ARRAY_SIZE (howto_table)) 543 { 544 bfd_set_error (bfd_error_bad_value); 545 return NULL; 546 } 547 if (rel->r_type >= R_AMD64_PCRLONG_1 && rel->r_type <= R_AMD64_PCRLONG_5) 548 { 549 rel->r_vaddr += (bfd_vma)(rel->r_type-R_AMD64_PCRLONG); 550 rel->r_type = R_AMD64_PCRLONG; 551 } 552 howto = howto_table + rel->r_type; 553 554#if defined(COFF_WITH_PE) 555 /* Cancel out code in _bfd_coff_generic_relocate_section. */ 556 *addendp = 0; 557#endif 558 559 if (howto->pc_relative) 560 *addendp += sec->vma; 561 562 if (sym != NULL && sym->n_scnum == 0 && sym->n_value != 0) 563 { 564 /* This is a common symbol. The section contents include the 565 size (sym->n_value) as an addend. The relocate_section 566 function will be adding in the final value of the symbol. We 567 need to subtract out the current size in order to get the 568 correct result. */ 569 BFD_ASSERT (h != NULL); 570 571#if !defined(COFF_WITH_PE) 572 /* I think we *do* want to bypass this. If we don't, I have 573 seen some data parameters get the wrong relocation address. 574 If I link two versions with and without this section bypassed 575 and then do a binary comparison, the addresses which are 576 different can be looked up in the map. The case in which 577 this section has been bypassed has addresses which correspond 578 to values I can find in the map. */ 579 *addendp -= sym->n_value; 580#endif 581 } 582 583#if !defined(COFF_WITH_PE) 584 /* If the output symbol is common (in which case this must be a 585 relocatable link), we need to add in the final size of the 586 common symbol. */ 587 if (h != NULL && h->root.type == bfd_link_hash_common) 588 *addendp += h->root.u.c.size; 589#endif 590 591#if defined(COFF_WITH_PE) 592 if (howto->pc_relative) 593 { 594 *addendp -= 4; 595 596 /* If the symbol is defined, then the generic code is going to 597 add back the symbol value in order to cancel out an 598 adjustment it made to the addend. However, we set the addend 599 to 0 at the start of this function. We need to adjust here, 600 to avoid the adjustment the generic code will make. FIXME: 601 This is getting a bit hackish. */ 602 if (sym != NULL && sym->n_scnum != 0) 603 *addendp -= sym->n_value; 604 } 605 606 if (rel->r_type == R_AMD64_IMAGEBASE 607 && (bfd_get_flavour (sec->output_section->owner) == bfd_target_coff_flavour)) 608 *addendp -= pe_data (sec->output_section->owner)->pe_opthdr.ImageBase; 609 610 if (rel->r_type == R_AMD64_SECREL) 611 { 612 bfd_vma osect_vma; 613 614 if (h && (h->type == bfd_link_hash_defined || h->type == bfd_link_hash_defweak)) 615 osect_vma = h->root.u.def.section->output_section->vma; 616 else 617 { 618 asection *sec; 619 int i; 620 621 /* Sigh, the only way to get the section to offset against 622 is to find it the hard way. */ 623 for (sec = abfd->sections, i = 1; i < sym->n_scnum; i++) 624 sec = sec->next; 625 626 osect_vma = sec->output_section->vma; 627 } 628 629 *addendp -= osect_vma; 630 } 631#endif 632 633 return howto; 634} 635 636#define coff_bfd_reloc_type_lookup coff_amd64_reloc_type_lookup 637#ifdef notyet 638#define coff_bfd_reloc_name_lookup coff_amd64_reloc_name_lookup 639#endif 640 641static reloc_howto_type * 642coff_amd64_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code) 643{ 644 switch (code) 645 { 646 case BFD_RELOC_RVA: 647 return howto_table + R_AMD64_IMAGEBASE; 648 case BFD_RELOC_32: 649 return howto_table + R_AMD64_DIR32; 650 case BFD_RELOC_64: 651 return howto_table + R_AMD64_DIR64; 652 case BFD_RELOC_64_PCREL: 653#ifndef DONT_EXTEND_AMD64 654 return howto_table + R_AMD64_PCRQUAD; 655#else 656 /* Fall through. */ 657#endif 658 case BFD_RELOC_32_PCREL: 659 return howto_table + R_AMD64_PCRLONG; 660 case BFD_RELOC_X86_64_32S: 661 return howto_table + R_RELLONG; 662 case BFD_RELOC_16: 663 return howto_table + R_RELWORD; 664 case BFD_RELOC_16_PCREL: 665 return howto_table + R_PCRWORD; 666 case BFD_RELOC_8: 667 return howto_table + R_RELBYTE; 668 case BFD_RELOC_8_PCREL: 669 return howto_table + R_PCRBYTE; 670#ifdef notyet 671#if defined(COFF_WITH_PE) 672 case BFD_RELOC_32_SECREL: 673 return howto_table + R_AMD64_SECREL; 674#endif 675#endif 676 default: 677 BFD_FAIL (); 678 return 0; 679 } 680} 681 682#ifdef notyet 683static reloc_howto_type * 684coff_amd64_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 685 const char *r_name) 686{ 687 unsigned int i; 688 689 for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++) 690 if (howto_table[i].name != NULL 691 && strcasecmp (howto_table[i].name, r_name) == 0) 692 return &howto_table[i]; 693 694 return NULL; 695} 696#endif 697 698#define coff_rtype_to_howto coff_amd64_rtype_to_howto 699 700#ifdef TARGET_UNDERSCORE 701 702/* If amd64 gcc uses underscores for symbol names, then it does not use 703 a leading dot for local labels, so if TARGET_UNDERSCORE is defined 704 we treat all symbols starting with L as local. */ 705 706static bfd_boolean 707coff_amd64_is_local_label_name (bfd *abfd, const char *name) 708{ 709 if (name[0] == 'L') 710 return TRUE; 711 712 return _bfd_coff_is_local_label_name (abfd, name); 713} 714 715#define coff_bfd_is_local_label_name coff_amd64_is_local_label_name 716 717#endif /* TARGET_UNDERSCORE */ 718 719#include "coffcode.h" 720 721#ifdef PE 722#define amd64coff_object_p pe_bfd_object_p 723#else 724#define amd64coff_object_p coff_object_p 725#endif 726 727const bfd_target 728#ifdef TARGET_SYM 729 TARGET_SYM = 730#else 731 x86_64coff_vec = 732#endif 733{ 734#ifdef TARGET_NAME 735 TARGET_NAME, 736#else 737 "coff-x86-64", /* Name. */ 738#endif 739 bfd_target_coff_flavour, 740 BFD_ENDIAN_LITTLE, /* Data byte order is little. */ 741 BFD_ENDIAN_LITTLE, /* Header byte order is little. */ 742 743 (HAS_RELOC | EXEC_P | /* Object flags. */ 744 HAS_LINENO | HAS_DEBUG | 745 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), 746 747 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* Section flags. */ 748#if defined(COFF_WITH_PE) 749 | SEC_LINK_ONCE | SEC_LINK_DUPLICATES | SEC_READONLY 750#endif 751 | SEC_CODE | SEC_DATA), 752 753#ifdef TARGET_UNDERSCORE 754 TARGET_UNDERSCORE, /* Leading underscore. */ 755#else 756 0, /* Leading underscore. */ 757#endif 758 '/', /* Ar_pad_char. */ 759 15, /* Ar_max_namelen. */ 760 761 bfd_getl64, bfd_getl_signed_64, bfd_putl64, 762 bfd_getl32, bfd_getl_signed_32, bfd_putl32, 763 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Data. */ 764 bfd_getl64, bfd_getl_signed_64, bfd_putl64, 765 bfd_getl32, bfd_getl_signed_32, bfd_putl32, 766 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Hdrs. */ 767 768 /* Note that we allow an object file to be treated as a core file as well. */ 769 { _bfd_dummy_target, amd64coff_object_p, /* BFD_check_format. */ 770 bfd_generic_archive_p, amd64coff_object_p }, 771 { bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format. */ 772 bfd_false }, 773 { bfd_false, coff_write_object_contents, /* bfd_write_contents. */ 774 _bfd_write_archive_contents, bfd_false }, 775 776 BFD_JUMP_TABLE_GENERIC (coff), 777 BFD_JUMP_TABLE_COPY (coff), 778 BFD_JUMP_TABLE_CORE (_bfd_nocore), 779 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), 780 BFD_JUMP_TABLE_SYMBOLS (coff), 781 BFD_JUMP_TABLE_RELOCS (coff), 782 BFD_JUMP_TABLE_WRITE (coff), 783 BFD_JUMP_TABLE_LINK (coff), 784 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), 785 786 NULL, 787 788 COFF_SWAP_TABLE 789}; 790