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include/
[binutils.git] / bfd / coff-x86_64.c
blob78a788670b96d22ef5fce3e4234fe15a1c5a5f00
1 /* BFD back-end for AMD 64 COFF files.
2 Copyright 2006, 2007, 2008 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 #include "sysdep.h"
28 #include "bfd.h"
29 #include "libbfd.h"
30 #include "coff/x86_64.h"
31 #include "coff/internal.h"
32 #include "coff/pe.h"
33 #include "libcoff.h"
34 #include "libiberty.h"
35
36 #define BADMAG(x) AMD64BADMAG(x)
37
38 #ifdef COFF_WITH_pex64
39 # undef AOUTSZ
40 # define AOUTSZ PEPAOUTSZ
41 # define PEAOUTHDR PEPAOUTHDR
42 #endif
43
44 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2)
45
46 /* The page size is a guess based on ELF. */
47
48 #define COFF_PAGE_SIZE 0x1000
49
50 /* For some reason when using AMD COFF the value stored in the .text
51 section for a reference to a common symbol is the value itself plus
52 any desired offset. Ian Taylor, Cygnus Support. */
53
54 /* If we are producing relocatable output, we need to do some
55 adjustments to the object file that are not done by the
56 bfd_perform_relocation function. This function is called by every
57 reloc type to make any required adjustments. */
58
59 static bfd_reloc_status_type
60 coff_amd64_reloc (bfd *abfd,
61 arelent *reloc_entry,
62 asymbol *symbol,
63 void * data,
64 asection *input_section ATTRIBUTE_UNUSED,
65 bfd *output_bfd,
66 char **error_message ATTRIBUTE_UNUSED)
67 {
68 symvalue diff;
69
70 #if !defined(COFF_WITH_PE)
71 if (output_bfd == NULL)
72 return bfd_reloc_continue;
73 #endif
74
75 if (bfd_is_com_section (symbol->section))
76 {
77 #if !defined(COFF_WITH_PE)
78 /* We are relocating a common symbol. The current value in the
79 object file is ORIG + OFFSET, where ORIG is the value of the
80 common symbol as seen by the object file when it was compiled
81 (this may be zero if the symbol was undefined) and OFFSET is
82 the offset into the common symbol (normally zero, but may be
83 non-zero when referring to a field in a common structure).
84 ORIG is the negative of reloc_entry->addend, which is set by
85 the CALC_ADDEND macro below. We want to replace the value in
86 the object file with NEW + OFFSET, where NEW is the value of
87 the common symbol which we are going to put in the final
88 object file. NEW is symbol->value. */
89 diff = symbol->value + reloc_entry->addend;
90 #else
91 /* In PE mode, we do not offset the common symbol. */
92 diff = reloc_entry->addend;
93 #endif
94 }
95 else
96 {
97 /* For some reason bfd_perform_relocation always effectively
98 ignores the addend for a COFF target when producing
99 relocatable output. This seems to be always wrong for 386
100 COFF, so we handle the addend here instead. */
101 #if defined(COFF_WITH_PE)
102 if (output_bfd == NULL)
103 {
104 reloc_howto_type *howto = reloc_entry->howto;
105
106 /* Although PC relative relocations are very similar between
107 PE and non-PE formats, but they are off by 1 << howto->size
108 bytes. For the external relocation, PE is very different
109 from others. See md_apply_fix3 () in gas/config/tc-amd64.c.
110 When we link PE and non-PE object files together to
111 generate a non-PE executable, we have to compensate it
112 here. */
113 if(howto->pc_relative && howto->pcrel_offset)
114 diff = -(1 << howto->size);
115 else if(symbol->flags & BSF_WEAK)
116 diff = reloc_entry->addend - symbol->value;
117 else
118 diff = -reloc_entry->addend;
119 }
120 else
121 #endif
122 diff = reloc_entry->addend;
123 }
124
125 #if defined(COFF_WITH_PE)
126 /* FIXME: How should this case be handled? */
127 if (reloc_entry->howto->type == R_AMD64_IMAGEBASE
128 && output_bfd != NULL
129 && bfd_get_flavour (output_bfd) == bfd_target_coff_flavour)
130 diff -= pe_data (output_bfd)->pe_opthdr.ImageBase;
131 #endif
132
133 #define DOIT(x) \
134 x = ((x & ~howto->dst_mask) | (((x & howto->src_mask) + diff) & howto->dst_mask))
135
136 if (diff != 0)
137 {
138 reloc_howto_type *howto = reloc_entry->howto;
139 unsigned char *addr = (unsigned char *) data + reloc_entry->address;
140
141 switch (howto->size)
142 {
143 case 0:
144 {
145 char x = bfd_get_8 (abfd, addr);
146 DOIT (x);
147 bfd_put_8 (abfd, x, addr);
148 }
149 break;
150
151 case 1:
152 {
153 short x = bfd_get_16 (abfd, addr);
154 DOIT (x);
155 bfd_put_16 (abfd, (bfd_vma) x, addr);
156 }
157 break;
158
159 case 2:
160 {
161 long x = bfd_get_32 (abfd, addr);
162 DOIT (x);
163 bfd_put_32 (abfd, (bfd_vma) x, addr);
164 }
165 break;
166 case 4:
167 {
168 long long x = bfd_get_64 (abfd, addr);
169 DOIT (x);
170 bfd_put_64 (abfd, (bfd_vma) x, addr);
171 }
172 break;
173
174 default:
175 abort ();
176 }
177 }
178
179 /* Now let bfd_perform_relocation finish everything up. */
180 return bfd_reloc_continue;
181 }
182
183 #if defined(COFF_WITH_PE)
184 /* Return TRUE if this relocation should appear in the output .reloc
185 section. */
186
187 static bfd_boolean
188 in_reloc_p (bfd *abfd ATTRIBUTE_UNUSED, reloc_howto_type *howto)
189 {
190 return ! howto->pc_relative && howto->type != R_AMD64_IMAGEBASE;
191 }
192 #endif /* COFF_WITH_PE */
193
194 #ifndef PCRELOFFSET
195 #define PCRELOFFSET TRUE
196 #endif
197
198 static reloc_howto_type howto_table[] =
199 {
200 EMPTY_HOWTO (0),
201 HOWTO (R_AMD64_DIR64, /* type 1*/
202 0, /* rightshift */
203 4, /* size (0 = byte, 1 = short, 2 = long, 4 = long long) */
204 64, /* bitsize */
205 FALSE, /* pc_relative */
206 0, /* bitpos */
207 complain_overflow_bitfield, /* complain_on_overflow */
208 coff_amd64_reloc, /* special_function */
209 "R_X86_64_64", /* name */
210 TRUE, /* partial_inplace */
211 0xffffffffffffffffll, /* src_mask */
212 0xffffffffffffffffll, /* dst_mask */
213 TRUE), /* pcrel_offset */
214 HOWTO (R_AMD64_DIR32, /* type 2 */
215 0, /* rightshift */
216 2, /* size (0 = byte, 1 = short, 2 = long) */
217 32, /* bitsize */
218 FALSE, /* pc_relative */
219 0, /* bitpos */
220 complain_overflow_bitfield, /* complain_on_overflow */
221 coff_amd64_reloc, /* special_function */
222 "R_X86_64_32", /* name */
223 TRUE, /* partial_inplace */
224 0xffffffff, /* src_mask */
225 0xffffffff, /* dst_mask */
226 TRUE), /* pcrel_offset */
227 /* PE IMAGE_REL_AMD64_ADDR32NB relocation (3). */
228 HOWTO (R_AMD64_IMAGEBASE, /* type */
229 0, /* rightshift */
230 2, /* size (0 = byte, 1 = short, 2 = long) */
231 32, /* bitsize */
232 FALSE, /* pc_relative */
233 0, /* bitpos */
234 complain_overflow_bitfield, /* complain_on_overflow */
235 coff_amd64_reloc, /* special_function */
236 "rva32", /* name */
237 TRUE, /* partial_inplace */
238 0xffffffff, /* src_mask */
239 0xffffffff, /* dst_mask */
240 FALSE), /* pcrel_offset */
241 /* 32-bit longword PC relative relocation (4). */
242 HOWTO (R_AMD64_PCRLONG, /* type 4 */
243 0, /* rightshift */
244 2, /* size (0 = byte, 1 = short, 2 = long) */
245 32, /* bitsize */
246 TRUE, /* pc_relative */
247 0, /* bitpos */
248 complain_overflow_signed, /* complain_on_overflow */
249 coff_amd64_reloc, /* special_function */
250 "R_X86_64_PC32", /* name */
251 TRUE, /* partial_inplace */
252 0xffffffff, /* src_mask */
253 0xffffffff, /* dst_mask */
254 PCRELOFFSET), /* pcrel_offset */
255
256 HOWTO (R_AMD64_PCRLONG_1, /* type 5 */
257 0, /* rightshift */
258 2, /* size (0 = byte, 1 = short, 2 = long) */
259 32, /* bitsize */
260 TRUE, /* pc_relative */
261 0, /* bitpos */
262 complain_overflow_signed, /* complain_on_overflow */
263 coff_amd64_reloc, /* special_function */
264 "DISP32+1", /* name */
265 TRUE, /* partial_inplace */
266 0xffffffff, /* src_mask */
267 0xffffffff, /* dst_mask */
268 PCRELOFFSET), /* pcrel_offset */
269 HOWTO (R_AMD64_PCRLONG_2, /* type 6 */
270 0, /* rightshift */
271 2, /* size (0 = byte, 1 = short, 2 = long) */
272 32, /* bitsize */
273 TRUE, /* pc_relative */
274 0, /* bitpos */
275 complain_overflow_signed, /* complain_on_overflow */
276 coff_amd64_reloc, /* special_function */
277 "DISP32+2", /* name */
278 TRUE, /* partial_inplace */
279 0xffffffff, /* src_mask */
280 0xffffffff, /* dst_mask */
281 PCRELOFFSET), /* pcrel_offset */
282 HOWTO (R_AMD64_PCRLONG_3, /* type 7 */
283 0, /* rightshift */
284 2, /* size (0 = byte, 1 = short, 2 = long) */
285 32, /* bitsize */
286 TRUE, /* pc_relative */
287 0, /* bitpos */
288 complain_overflow_signed, /* complain_on_overflow */
289 coff_amd64_reloc, /* special_function */
290 "DISP32+3", /* name */
291 TRUE, /* partial_inplace */
292 0xffffffff, /* src_mask */
293 0xffffffff, /* dst_mask */
294 PCRELOFFSET), /* pcrel_offset */
295 HOWTO (R_AMD64_PCRLONG_4, /* type 8 */
296 0, /* rightshift */
297 2, /* size (0 = byte, 1 = short, 2 = long) */
298 32, /* bitsize */
299 TRUE, /* pc_relative */
300 0, /* bitpos */
301 complain_overflow_signed, /* complain_on_overflow */
302 coff_amd64_reloc, /* special_function */
303 "DISP32+4", /* name */
304 TRUE, /* partial_inplace */
305 0xffffffff, /* src_mask */
306 0xffffffff, /* dst_mask */
307 PCRELOFFSET), /* pcrel_offset */
308 HOWTO (R_AMD64_PCRLONG_5, /* type 9 */
309 0, /* rightshift */
310 2, /* size (0 = byte, 1 = short, 2 = long) */
311 32, /* bitsize */
312 TRUE, /* pc_relative */
313 0, /* bitpos */
314 complain_overflow_signed, /* complain_on_overflow */
315 coff_amd64_reloc, /* special_function */
316 "DISP32+5", /* name */
317 TRUE, /* partial_inplace */
318 0xffffffff, /* src_mask */
319 0xffffffff, /* dst_mask */
320 PCRELOFFSET), /* pcrel_offset */
321 EMPTY_HOWTO (10), /* R_AMD64_SECTION 10 */
322 #if defined(COFF_WITH_PE)
323 /* 32-bit longword section relative relocation (11). */
324 HOWTO (R_AMD64_SECREL, /* type */
325 0, /* rightshift */
326 2, /* size (0 = byte, 1 = short, 2 = long) */
327 32, /* bitsize */
328 FALSE, /* pc_relative */
329 0, /* bitpos */
330 complain_overflow_bitfield, /* complain_on_overflow */
331 coff_amd64_reloc, /* special_function */
332 "secrel32", /* name */
333 TRUE, /* partial_inplace */
334 0xffffffff, /* src_mask */
335 0xffffffff, /* dst_mask */
336 TRUE), /* pcrel_offset */
337 #else
338 EMPTY_HOWTO (11),
339 #endif
340 EMPTY_HOWTO (12),
341 EMPTY_HOWTO (13),
342 #ifndef DONT_EXTEND_AMD64
343 HOWTO (R_AMD64_PCRQUAD,
344 0, /* rightshift */
345 4, /* size (0 = byte, 1 = short, 2 = long) */
346 64, /* bitsize */
347 TRUE, /* pc_relative */
348 0, /* bitpos */
349 complain_overflow_signed, /* complain_on_overflow */
350 coff_amd64_reloc, /* special_function */
351 "R_X86_64_PC64", /* name */
352 TRUE, /* partial_inplace */
353 0xffffffffffffffffll, /* src_mask */
354 0xffffffffffffffffll, /* dst_mask */
355 PCRELOFFSET), /* pcrel_offset */
356 #else
357 EMPTY_HOWTO (14),
358 #endif
359 /* Byte relocation (15). */
360 HOWTO (R_RELBYTE, /* type */
361 0, /* rightshift */
362 0, /* size (0 = byte, 1 = short, 2 = long) */
363 8, /* bitsize */
364 FALSE, /* pc_relative */
365 0, /* bitpos */
366 complain_overflow_bitfield, /* complain_on_overflow */
367 coff_amd64_reloc, /* special_function */
368 "R_X86_64_8", /* name */
369 TRUE, /* partial_inplace */
370 0x000000ff, /* src_mask */
371 0x000000ff, /* dst_mask */
372 PCRELOFFSET), /* pcrel_offset */
373 /* 16-bit word relocation (16). */
374 HOWTO (R_RELWORD, /* type */
375 0, /* rightshift */
376 1, /* size (0 = byte, 1 = short, 2 = long) */
377 16, /* bitsize */
378 FALSE, /* pc_relative */
379 0, /* bitpos */
380 complain_overflow_bitfield, /* complain_on_overflow */
381 coff_amd64_reloc, /* special_function */
382 "R_X86_64_16", /* name */
383 TRUE, /* partial_inplace */
384 0x0000ffff, /* src_mask */
385 0x0000ffff, /* dst_mask */
386 PCRELOFFSET), /* pcrel_offset */
387 /* 32-bit longword relocation (17). */
388 HOWTO (R_RELLONG, /* type */
389 0, /* rightshift */
390 2, /* size (0 = byte, 1 = short, 2 = long) */
391 32, /* bitsize */
392 FALSE, /* pc_relative */
393 0, /* bitpos */
394 complain_overflow_bitfield, /* complain_on_overflow */
395 coff_amd64_reloc, /* special_function */
396 "R_X86_64_32S", /* name */
397 TRUE, /* partial_inplace */
398 0xffffffff, /* src_mask */
399 0xffffffff, /* dst_mask */
400 PCRELOFFSET), /* pcrel_offset */
401 /* Byte PC relative relocation (18). */
402 HOWTO (R_PCRBYTE, /* type */
403 0, /* rightshift */
404 0, /* size (0 = byte, 1 = short, 2 = long) */
405 8, /* bitsize */
406 TRUE, /* pc_relative */
407 0, /* bitpos */
408 complain_overflow_signed, /* complain_on_overflow */
409 coff_amd64_reloc, /* special_function */
410 "R_X86_64_PC8", /* name */
411 TRUE, /* partial_inplace */
412 0x000000ff, /* src_mask */
413 0x000000ff, /* dst_mask */
414 PCRELOFFSET), /* pcrel_offset */
415 /* 16-bit word PC relative relocation (19). */
416 HOWTO (R_PCRWORD, /* type */
417 0, /* rightshift */
418 1, /* size (0 = byte, 1 = short, 2 = long) */
419 16, /* bitsize */
420 TRUE, /* pc_relative */
421 0, /* bitpos */
422 complain_overflow_signed, /* complain_on_overflow */
423 coff_amd64_reloc, /* special_function */
424 "R_X86_64_PC16", /* name */
425 TRUE, /* partial_inplace */
426 0x0000ffff, /* src_mask */
427 0x0000ffff, /* dst_mask */
428 PCRELOFFSET), /* pcrel_offset */
429 /* 32-bit longword PC relative relocation (20). */
430 HOWTO (R_PCRLONG, /* type */
431 0, /* rightshift */
432 2, /* size (0 = byte, 1 = short, 2 = long) */
433 32, /* bitsize */
434 TRUE, /* pc_relative */
435 0, /* bitpos */
436 complain_overflow_signed, /* complain_on_overflow */
437 coff_amd64_reloc, /* special_function */
438 "R_X86_64_PC32", /* name */
439 TRUE, /* partial_inplace */
440 0xffffffff, /* src_mask */
441 0xffffffff, /* dst_mask */
442 PCRELOFFSET) /* pcrel_offset */
443 };
444
445 /* Turn a howto into a reloc nunmber */
446
447 #define SELECT_RELOC(x,howto) { x.r_type = howto->type; }
448 #define I386 1 /* Customize coffcode.h */
449 #define AMD64 1
450
451 #define RTYPE2HOWTO(cache_ptr, dst) \
452 ((cache_ptr)->howto = \
453 ((dst)->r_type < ARRAY_SIZE (howto_table)) \
454 ? howto_table + (dst)->r_type \
455 : NULL)
456
457 /* For 386 COFF a STYP_NOLOAD | STYP_BSS section is part of a shared
458 library. On some other COFF targets STYP_BSS is normally
459 STYP_NOLOAD. */
460 #define BSS_NOLOAD_IS_SHARED_LIBRARY
461
462 /* Compute the addend of a reloc. If the reloc is to a common symbol,
463 the object file contains the value of the common symbol. By the
464 time this is called, the linker may be using a different symbol
465 from a different object file with a different value. Therefore, we
466 hack wildly to locate the original symbol from this file so that we
467 can make the correct adjustment. This macro sets coffsym to the
468 symbol from the original file, and uses it to set the addend value
469 correctly. If this is not a common symbol, the usual addend
470 calculation is done, except that an additional tweak is needed for
471 PC relative relocs.
472 FIXME: This macro refers to symbols and asect; these are from the
473 calling function, not the macro arguments. */
474
475 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
476 { \
477 coff_symbol_type *coffsym = NULL; \
478 \
479 if (ptr && bfd_asymbol_bfd (ptr) != abfd) \
480 coffsym = (obj_symbols (abfd) \
481 + (cache_ptr->sym_ptr_ptr - symbols)); \
482 else if (ptr) \
483 coffsym = coff_symbol_from (abfd, ptr); \
484 \
485 if (coffsym != NULL \
486 && coffsym->native->u.syment.n_scnum == 0) \
487 cache_ptr->addend = - coffsym->native->u.syment.n_value; \
488 else if (ptr && bfd_asymbol_bfd (ptr) == abfd \
489 && ptr->section != NULL) \
490 cache_ptr->addend = - (ptr->section->vma + ptr->value); \
491 else \
492 cache_ptr->addend = 0; \
493 if (ptr && howto_table[reloc.r_type].pc_relative) \
494 cache_ptr->addend += asect->vma; \
495 }
496
497 /* We use the special COFF backend linker. For normal AMD64 COFF, we
498 can use the generic relocate_section routine. For PE, we need our
499 own routine. */
500
501 #if !defined(COFF_WITH_PE)
502
503 #define coff_relocate_section _bfd_coff_generic_relocate_section
504
505 #else /* COFF_WITH_PE */
506
507 /* The PE relocate section routine. The only difference between this
508 and the regular routine is that we don't want to do anything for a
509 relocatable link. */
510
511 static bfd_boolean
512 coff_pe_amd64_relocate_section (bfd *output_bfd,
513 struct bfd_link_info *info,
514 bfd *input_bfd,
515 asection *input_section,
516 bfd_byte *contents,
517 struct internal_reloc *relocs,
518 struct internal_syment *syms,
519 asection **sections)
520 {
521 if (info->relocatable)
522 return TRUE;
523
524 return _bfd_coff_generic_relocate_section (output_bfd, info, input_bfd,input_section, contents,relocs, syms, sections);
525 }
526
527 #define coff_relocate_section coff_pe_amd64_relocate_section
528
529 #endif /* COFF_WITH_PE */
530
531 /* Convert an rtype to howto for the COFF backend linker. */
532
533 static reloc_howto_type *
534 coff_amd64_rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
535 asection *sec,
536 struct internal_reloc *rel,
537 struct coff_link_hash_entry *h,
538 struct internal_syment *sym,
539 bfd_vma *addendp)
540 {
541 reloc_howto_type *howto;
542
543 if (rel->r_type > ARRAY_SIZE (howto_table))
544 {
545 bfd_set_error (bfd_error_bad_value);
546 return NULL;
547 }
548 if (rel->r_type >= R_AMD64_PCRLONG_1 && rel->r_type <= R_AMD64_PCRLONG_5)
549 {
550 rel->r_vaddr += (bfd_vma)(rel->r_type-R_AMD64_PCRLONG);
551 rel->r_type = R_AMD64_PCRLONG;
552 }
553 howto = howto_table + rel->r_type;
554
555 #if defined(COFF_WITH_PE)
556 /* Cancel out code in _bfd_coff_generic_relocate_section. */
557 *addendp = 0;
558 #endif
559
560 if (howto->pc_relative)
561 *addendp += sec->vma;
562
563 if (sym != NULL && sym->n_scnum == 0 && sym->n_value != 0)
564 {
565 /* This is a common symbol. The section contents include the
566 size (sym->n_value) as an addend. The relocate_section
567 function will be adding in the final value of the symbol. We
568 need to subtract out the current size in order to get the
569 correct result. */
570 BFD_ASSERT (h != NULL);
571
572 #if !defined(COFF_WITH_PE)
573 /* I think we *do* want to bypass this. If we don't, I have
574 seen some data parameters get the wrong relocation address.
575 If I link two versions with and without this section bypassed
576 and then do a binary comparison, the addresses which are
577 different can be looked up in the map. The case in which
578 this section has been bypassed has addresses which correspond
579 to values I can find in the map. */
580 *addendp -= sym->n_value;
581 #endif
582 }
583
584 #if !defined(COFF_WITH_PE)
585 /* If the output symbol is common (in which case this must be a
586 relocatable link), we need to add in the final size of the
587 common symbol. */
588 if (h != NULL && h->root.type == bfd_link_hash_common)
589 *addendp += h->root.u.c.size;
590 #endif
591
592 #if defined(COFF_WITH_PE)
593 if (howto->pc_relative)
594 {
595 *addendp -= 4;
596
597 /* If the symbol is defined, then the generic code is going to
598 add back the symbol value in order to cancel out an
599 adjustment it made to the addend. However, we set the addend
600 to 0 at the start of this function. We need to adjust here,
601 to avoid the adjustment the generic code will make. FIXME:
602 This is getting a bit hackish. */
603 if (sym != NULL && sym->n_scnum != 0)
604 *addendp -= sym->n_value;
605 }
606
607 if (rel->r_type == R_AMD64_IMAGEBASE
608 && (bfd_get_flavour (sec->output_section->owner) == bfd_target_coff_flavour))
609 *addendp -= pe_data (sec->output_section->owner)->pe_opthdr.ImageBase;
610
611 if (rel->r_type == R_AMD64_SECREL)
612 {
613 bfd_vma osect_vma;
614
615 if (h && (h->type == bfd_link_hash_defined || h->type == bfd_link_hash_defweak))
616 osect_vma = h->root.u.def.section->output_section->vma;
617 else
618 {
619 asection *sec;
620 int i;
621
622 /* Sigh, the only way to get the section to offset against
623 is to find it the hard way. */
624 for (sec = abfd->sections, i = 1; i < sym->n_scnum; i++)
625 sec = sec->next;
626
627 osect_vma = sec->output_section->vma;
628 }
629
630 *addendp -= osect_vma;
631 }
632 #endif
633
634 return howto;
635 }
636
637 #define coff_bfd_reloc_type_lookup coff_amd64_reloc_type_lookup
638 #define coff_bfd_reloc_name_lookup coff_amd64_reloc_name_lookup
639
640 static reloc_howto_type *
641 coff_amd64_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code)
642 {
643 switch (code)
644 {
645 case BFD_RELOC_RVA:
646 return howto_table + R_AMD64_IMAGEBASE;
647 case BFD_RELOC_32:
648 return howto_table + R_AMD64_DIR32;
649 case BFD_RELOC_64:
650 return howto_table + R_AMD64_DIR64;
651 case BFD_RELOC_64_PCREL:
652 #ifndef DONT_EXTEND_AMD64
653 return howto_table + R_AMD64_PCRQUAD;
654 #else
655 /* Fall through. */
656 #endif
657 case BFD_RELOC_32_PCREL:
658 return howto_table + R_AMD64_PCRLONG;
659 case BFD_RELOC_X86_64_32S:
660 return howto_table + R_RELLONG;
661 case BFD_RELOC_16:
662 return howto_table + R_RELWORD;
663 case BFD_RELOC_16_PCREL:
664 return howto_table + R_PCRWORD;
665 case BFD_RELOC_8:
666 return howto_table + R_RELBYTE;
667 case BFD_RELOC_8_PCREL:
668 return howto_table + R_PCRBYTE;
669 #if defined(COFF_WITH_PE)
670 case BFD_RELOC_32_SECREL:
671 return howto_table + R_AMD64_SECREL;
672 #endif
673 default:
674 BFD_FAIL ();
675 return 0;
676 }
677 }
678
679 static reloc_howto_type *
680 coff_amd64_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
681 const char *r_name)
682 {
683 unsigned int i;
684
685 for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++)
686 if (howto_table[i].name != NULL
687 && strcasecmp (howto_table[i].name, r_name) == 0)
688 return &howto_table[i];
689
690 return NULL;
691 }
692
693 #define coff_rtype_to_howto coff_amd64_rtype_to_howto
694
695 #ifdef TARGET_UNDERSCORE
696
697 /* If amd64 gcc uses underscores for symbol names, then it does not use
698 a leading dot for local labels, so if TARGET_UNDERSCORE is defined
699 we treat all symbols starting with L as local. */
700
701 static bfd_boolean
702 coff_amd64_is_local_label_name (bfd *abfd, const char *name)
703 {
704 if (name[0] == 'L')
705 return TRUE;
706
707 return _bfd_coff_is_local_label_name (abfd, name);
708 }
709
710 #define coff_bfd_is_local_label_name coff_amd64_is_local_label_name
711
712 #endif /* TARGET_UNDERSCORE */
713
714 #ifndef bfd_pe_print_pdata
715 #define bfd_pe_print_pdata NULL
716 #endif
717
718 #include "coffcode.h"
719
720 #ifdef PE
721 #define amd64coff_object_p pe_bfd_object_p
722 #else
723 #define amd64coff_object_p coff_object_p
724 #endif
725
726 const bfd_target
727 #ifdef TARGET_SYM
728 TARGET_SYM =
729 #else
730 x86_64coff_vec =
731 #endif
732 {
733 #ifdef TARGET_NAME
734 TARGET_NAME,
735 #else
736 "coff-x86-64", /* Name. */
737 #endif
738 bfd_target_coff_flavour,
739 BFD_ENDIAN_LITTLE, /* Data byte order is little. */
740 BFD_ENDIAN_LITTLE, /* Header byte order is little. */
741
742 (HAS_RELOC | EXEC_P | /* Object flags. */
743 HAS_LINENO | HAS_DEBUG |
744 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
745
746 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* Section flags. */
747 #if defined(COFF_WITH_PE)
748 | SEC_LINK_ONCE | SEC_LINK_DUPLICATES | SEC_READONLY
749 #endif
750 | SEC_CODE | SEC_DATA),
751
752 #ifdef TARGET_UNDERSCORE
753 TARGET_UNDERSCORE, /* Leading underscore. */
754 #else
755 0, /* Leading underscore. */
756 #endif
757 '/', /* Ar_pad_char. */
758 15, /* Ar_max_namelen. */
759
760 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
761 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
762 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Data. */
763 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
764 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
765 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Hdrs. */
766
767 /* Note that we allow an object file to be treated as a core file as well. */
768 { _bfd_dummy_target, amd64coff_object_p, /* BFD_check_format. */
769 bfd_generic_archive_p, amd64coff_object_p },
770 { bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format. */
771 bfd_false },
772 { bfd_false, coff_write_object_contents, /* bfd_write_contents. */
773 _bfd_write_archive_contents, bfd_false },
774
775 BFD_JUMP_TABLE_GENERIC (coff),
776 BFD_JUMP_TABLE_COPY (coff),
777 BFD_JUMP_TABLE_CORE (_bfd_nocore),
778 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
779 BFD_JUMP_TABLE_SYMBOLS (coff),
780 BFD_JUMP_TABLE_RELOCS (coff),
781 BFD_JUMP_TABLE_WRITE (coff),
782 BFD_JUMP_TABLE_LINK (coff),
783 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
784
785 NULL,
786
787 COFF_SWAP_TABLE
788 };
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