| 1 | /* BFD back-end for AMD 64 COFF files. |
| 2 | Copyright 2006 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 "bfd.h" |
| 27 | #include "sysdep.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 | |
| 58 | static bfd_reloc_status_type |
| 59 | coff_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 | |
| 186 | static bfd_boolean |
| 187 | in_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 | |
| 197 | static 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 | |
| 510 | static bfd_boolean |
| 511 | coff_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 | |
| 532 | static reloc_howto_type * |
| 533 | coff_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 | |
| 638 | static reloc_howto_type * |
| 639 | coff_amd64_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code) |
| 640 | { |
| 641 | switch (code) |
| 642 | { |
| 643 | case BFD_RELOC_RVA: |
| 644 | return howto_table + R_AMD64_IMAGEBASE; |
| 645 | case BFD_RELOC_32: |
| 646 | return howto_table + R_AMD64_DIR32; |
| 647 | case BFD_RELOC_64: |
| 648 | return howto_table + R_AMD64_DIR64; |
| 649 | case BFD_RELOC_64_PCREL: |
| 650 | #ifndef DONT_EXTEND_AMD64 |
| 651 | return howto_table + R_AMD64_PCRQUAD; |
| 652 | #else |
| 653 | /* Fall through. */ |
| 654 | #endif |
| 655 | case BFD_RELOC_32_PCREL: |
| 656 | return howto_table + R_AMD64_PCRLONG; |
| 657 | case BFD_RELOC_X86_64_32S: |
| 658 | return howto_table + R_RELLONG; |
| 659 | case BFD_RELOC_16: |
| 660 | return howto_table + R_RELWORD; |
| 661 | case BFD_RELOC_16_PCREL: |
| 662 | return howto_table + R_PCRWORD; |
| 663 | case BFD_RELOC_8: |
| 664 | return howto_table + R_RELBYTE; |
| 665 | case BFD_RELOC_8_PCREL: |
| 666 | return howto_table + R_PCRBYTE; |
| 667 | #if defined(COFF_WITH_PE) |
| 668 | case BFD_RELOC_32_SECREL: |
| 669 | return howto_table + R_AMD64_SECREL; |
| 670 | #endif |
| 671 | default: |
| 672 | BFD_FAIL (); |
| 673 | return 0; |
| 674 | } |
| 675 | } |
| 676 | |
| 677 | #define coff_rtype_to_howto coff_amd64_rtype_to_howto |
| 678 | |
| 679 | #ifdef TARGET_UNDERSCORE |
| 680 | |
| 681 | /* If amd64 gcc uses underscores for symbol names, then it does not use |
| 682 | a leading dot for local labels, so if TARGET_UNDERSCORE is defined |
| 683 | we treat all symbols starting with L as local. */ |
| 684 | |
| 685 | static bfd_boolean |
| 686 | coff_amd64_is_local_label_name (bfd *abfd, const char *name) |
| 687 | { |
| 688 | if (name[0] == 'L') |
| 689 | return TRUE; |
| 690 | |
| 691 | return _bfd_coff_is_local_label_name (abfd, name); |
| 692 | } |
| 693 | |
| 694 | #define coff_bfd_is_local_label_name coff_amd64_is_local_label_name |
| 695 | |
| 696 | #endif /* TARGET_UNDERSCORE */ |
| 697 | |
| 698 | #include "coffcode.h" |
| 699 | |
| 700 | #ifdef PE |
| 701 | #define amd64coff_object_p pe_bfd_object_p |
| 702 | #else |
| 703 | #define amd64coff_object_p coff_object_p |
| 704 | #endif |
| 705 | |
| 706 | const bfd_target |
| 707 | #ifdef TARGET_SYM |
| 708 | TARGET_SYM = |
| 709 | #else |
| 710 | x86_64coff_vec = |
| 711 | #endif |
| 712 | { |
| 713 | #ifdef TARGET_NAME |
| 714 | TARGET_NAME, |
| 715 | #else |
| 716 | "coff-x86-64", /* Name. */ |
| 717 | #endif |
| 718 | bfd_target_coff_flavour, |
| 719 | BFD_ENDIAN_LITTLE, /* Data byte order is little. */ |
| 720 | BFD_ENDIAN_LITTLE, /* Header byte order is little. */ |
| 721 | |
| 722 | (HAS_RELOC | EXEC_P | /* Object flags. */ |
| 723 | HAS_LINENO | HAS_DEBUG | |
| 724 | HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), |
| 725 | |
| 726 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* Section flags. */ |
| 727 | #if defined(COFF_WITH_PE) |
| 728 | | SEC_LINK_ONCE | SEC_LINK_DUPLICATES | SEC_READONLY |
| 729 | #endif |
| 730 | | SEC_CODE | SEC_DATA), |
| 731 | |
| 732 | #ifdef TARGET_UNDERSCORE |
| 733 | TARGET_UNDERSCORE, /* Leading underscore. */ |
| 734 | #else |
| 735 | 0, /* Leading underscore. */ |
| 736 | #endif |
| 737 | '/', /* Ar_pad_char. */ |
| 738 | 15, /* Ar_max_namelen. */ |
| 739 | |
| 740 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, |
| 741 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, |
| 742 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Data. */ |
| 743 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, |
| 744 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, |
| 745 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Hdrs. */ |
| 746 | |
| 747 | /* Note that we allow an object file to be treated as a core file as well. */ |
| 748 | { _bfd_dummy_target, amd64coff_object_p, /* BFD_check_format. */ |
| 749 | bfd_generic_archive_p, amd64coff_object_p }, |
| 750 | { bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format. */ |
| 751 | bfd_false }, |
| 752 | { bfd_false, coff_write_object_contents, /* bfd_write_contents. */ |
| 753 | _bfd_write_archive_contents, bfd_false }, |
| 754 | |
| 755 | BFD_JUMP_TABLE_GENERIC (coff), |
| 756 | BFD_JUMP_TABLE_COPY (coff), |
| 757 | BFD_JUMP_TABLE_CORE (_bfd_nocore), |
| 758 | BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), |
| 759 | BFD_JUMP_TABLE_SYMBOLS (coff), |
| 760 | BFD_JUMP_TABLE_RELOCS (coff), |
| 761 | BFD_JUMP_TABLE_WRITE (coff), |
| 762 | BFD_JUMP_TABLE_LINK (coff), |
| 763 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), |
| 764 | |
| 765 | NULL, |
| 766 | |
| 767 | COFF_SWAP_TABLE |
| 768 | }; |