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Fix formatting in coff-x86_64.c
[deliverable/binutils-gdb.git] / bfd / coff-x86_64.c
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
151 || addr > ((unsigned char *) data) + input_section->size)
152 {
153 bfd_set_error (bfd_error_bad_value);
154 return bfd_reloc_notsupported;
155 }
156
157 switch (howto->size)
158 {
159 case 0:
160 {
161 char x = bfd_get_8 (abfd, addr);
162 DOIT (x);
163 bfd_put_8 (abfd, x, addr);
164 }
165 break;
166
167 case 1:
168 {
169 short x = bfd_get_16 (abfd, addr);
170 DOIT (x);
171 bfd_put_16 (abfd, (bfd_vma) x, addr);
172 }
173 break;
174
175 case 2:
176 {
177 long x = bfd_get_32 (abfd, addr);
178 DOIT (x);
179 bfd_put_32 (abfd, (bfd_vma) x, addr);
180 }
181 break;
182
183 case 4:
184 {
185 long long x = bfd_get_64 (abfd, addr);
186 DOIT (x);
187 bfd_put_64 (abfd, (bfd_vma) x, addr);
188 }
189 break;
190
191 default:
192 bfd_set_error (bfd_error_bad_value);
193 return bfd_reloc_notsupported;
194 }
195 }
196
197 /* Now let bfd_perform_relocation finish everything up. */
198 return bfd_reloc_continue;
199 }
200
201 #if defined(COFF_WITH_PE)
202 /* Return TRUE if this relocation should appear in the output .reloc
203 section. */
204
205 static bfd_boolean
206 in_reloc_p (bfd *abfd ATTRIBUTE_UNUSED, reloc_howto_type *howto)
207 {
208 return ! howto->pc_relative && howto->type != R_AMD64_IMAGEBASE
209 && howto->type != R_AMD64_SECREL;
210 }
211 #endif /* COFF_WITH_PE */
212
213 #ifndef PCRELOFFSET
214 #define PCRELOFFSET TRUE
215 #endif
216
217 static reloc_howto_type howto_table[] =
218 {
219 EMPTY_HOWTO (0),
220 HOWTO (R_AMD64_DIR64, /* type 1*/
221 0, /* rightshift */
222 4, /* size (0 = byte, 1 = short, 2 = long, 4 = long long) */
223 64, /* bitsize */
224 FALSE, /* pc_relative */
225 0, /* bitpos */
226 complain_overflow_bitfield, /* complain_on_overflow */
227 coff_amd64_reloc, /* special_function */
228 "R_X86_64_64", /* name */
229 TRUE, /* partial_inplace */
230 0xffffffffffffffffll, /* src_mask */
231 0xffffffffffffffffll, /* dst_mask */
232 TRUE), /* pcrel_offset */
233 HOWTO (R_AMD64_DIR32, /* type 2 */
234 0, /* rightshift */
235 2, /* size (0 = byte, 1 = short, 2 = long) */
236 32, /* bitsize */
237 FALSE, /* pc_relative */
238 0, /* bitpos */
239 complain_overflow_bitfield, /* complain_on_overflow */
240 coff_amd64_reloc, /* special_function */
241 "R_X86_64_32", /* name */
242 TRUE, /* partial_inplace */
243 0xffffffff, /* src_mask */
244 0xffffffff, /* dst_mask */
245 TRUE), /* pcrel_offset */
246 /* PE IMAGE_REL_AMD64_ADDR32NB relocation (3). */
247 HOWTO (R_AMD64_IMAGEBASE, /* type */
248 0, /* rightshift */
249 2, /* size (0 = byte, 1 = short, 2 = long) */
250 32, /* bitsize */
251 FALSE, /* pc_relative */
252 0, /* bitpos */
253 complain_overflow_bitfield, /* complain_on_overflow */
254 coff_amd64_reloc, /* special_function */
255 "rva32", /* name */
256 TRUE, /* partial_inplace */
257 0xffffffff, /* src_mask */
258 0xffffffff, /* dst_mask */
259 FALSE), /* pcrel_offset */
260 /* 32-bit longword PC relative relocation (4). */
261 HOWTO (R_AMD64_PCRLONG, /* type 4 */
262 0, /* rightshift */
263 2, /* size (0 = byte, 1 = short, 2 = long) */
264 32, /* bitsize */
265 TRUE, /* pc_relative */
266 0, /* bitpos */
267 complain_overflow_signed, /* complain_on_overflow */
268 coff_amd64_reloc, /* special_function */
269 "R_X86_64_PC32", /* name */
270 TRUE, /* partial_inplace */
271 0xffffffff, /* src_mask */
272 0xffffffff, /* dst_mask */
273 PCRELOFFSET), /* pcrel_offset */
274
275 HOWTO (R_AMD64_PCRLONG_1, /* type 5 */
276 0, /* rightshift */
277 2, /* size (0 = byte, 1 = short, 2 = long) */
278 32, /* bitsize */
279 TRUE, /* pc_relative */
280 0, /* bitpos */
281 complain_overflow_signed, /* complain_on_overflow */
282 coff_amd64_reloc, /* special_function */
283 "DISP32+1", /* name */
284 TRUE, /* partial_inplace */
285 0xffffffff, /* src_mask */
286 0xffffffff, /* dst_mask */
287 PCRELOFFSET), /* pcrel_offset */
288 HOWTO (R_AMD64_PCRLONG_2, /* type 6 */
289 0, /* rightshift */
290 2, /* size (0 = byte, 1 = short, 2 = long) */
291 32, /* bitsize */
292 TRUE, /* pc_relative */
293 0, /* bitpos */
294 complain_overflow_signed, /* complain_on_overflow */
295 coff_amd64_reloc, /* special_function */
296 "DISP32+2", /* name */
297 TRUE, /* partial_inplace */
298 0xffffffff, /* src_mask */
299 0xffffffff, /* dst_mask */
300 PCRELOFFSET), /* pcrel_offset */
301 HOWTO (R_AMD64_PCRLONG_3, /* type 7 */
302 0, /* rightshift */
303 2, /* size (0 = byte, 1 = short, 2 = long) */
304 32, /* bitsize */
305 TRUE, /* pc_relative */
306 0, /* bitpos */
307 complain_overflow_signed, /* complain_on_overflow */
308 coff_amd64_reloc, /* special_function */
309 "DISP32+3", /* name */
310 TRUE, /* partial_inplace */
311 0xffffffff, /* src_mask */
312 0xffffffff, /* dst_mask */
313 PCRELOFFSET), /* pcrel_offset */
314 HOWTO (R_AMD64_PCRLONG_4, /* type 8 */
315 0, /* rightshift */
316 2, /* size (0 = byte, 1 = short, 2 = long) */
317 32, /* bitsize */
318 TRUE, /* pc_relative */
319 0, /* bitpos */
320 complain_overflow_signed, /* complain_on_overflow */
321 coff_amd64_reloc, /* special_function */
322 "DISP32+4", /* name */
323 TRUE, /* partial_inplace */
324 0xffffffff, /* src_mask */
325 0xffffffff, /* dst_mask */
326 PCRELOFFSET), /* pcrel_offset */
327 HOWTO (R_AMD64_PCRLONG_5, /* type 9 */
328 0, /* rightshift */
329 2, /* size (0 = byte, 1 = short, 2 = long) */
330 32, /* bitsize */
331 TRUE, /* pc_relative */
332 0, /* bitpos */
333 complain_overflow_signed, /* complain_on_overflow */
334 coff_amd64_reloc, /* special_function */
335 "DISP32+5", /* name */
336 TRUE, /* partial_inplace */
337 0xffffffff, /* src_mask */
338 0xffffffff, /* dst_mask */
339 PCRELOFFSET), /* pcrel_offset */
340 EMPTY_HOWTO (10), /* R_AMD64_SECTION 10 */
341 #if defined(COFF_WITH_PE)
342 /* 32-bit longword section relative relocation (11). */
343 HOWTO (R_AMD64_SECREL, /* type */
344 0, /* rightshift */
345 2, /* size (0 = byte, 1 = short, 2 = long) */
346 32, /* bitsize */
347 FALSE, /* pc_relative */
348 0, /* bitpos */
349 complain_overflow_bitfield, /* complain_on_overflow */
350 coff_amd64_reloc, /* special_function */
351 "secrel32", /* name */
352 TRUE, /* partial_inplace */
353 0xffffffff, /* src_mask */
354 0xffffffff, /* dst_mask */
355 TRUE), /* pcrel_offset */
356 #else
357 EMPTY_HOWTO (11),
358 #endif
359 EMPTY_HOWTO (12),
360 EMPTY_HOWTO (13),
361 #ifndef DONT_EXTEND_AMD64
362 HOWTO (R_AMD64_PCRQUAD,
363 0, /* rightshift */
364 4, /* size (0 = byte, 1 = short, 2 = long) */
365 64, /* bitsize */
366 TRUE, /* pc_relative */
367 0, /* bitpos */
368 complain_overflow_signed, /* complain_on_overflow */
369 coff_amd64_reloc, /* special_function */
370 "R_X86_64_PC64", /* name */
371 TRUE, /* partial_inplace */
372 0xffffffffffffffffll, /* src_mask */
373 0xffffffffffffffffll, /* dst_mask */
374 PCRELOFFSET), /* pcrel_offset */
375 #else
376 EMPTY_HOWTO (14),
377 #endif
378 /* Byte relocation (15). */
379 HOWTO (R_RELBYTE, /* type */
380 0, /* rightshift */
381 0, /* size (0 = byte, 1 = short, 2 = long) */
382 8, /* bitsize */
383 FALSE, /* pc_relative */
384 0, /* bitpos */
385 complain_overflow_bitfield, /* complain_on_overflow */
386 coff_amd64_reloc, /* special_function */
387 "R_X86_64_8", /* name */
388 TRUE, /* partial_inplace */
389 0x000000ff, /* src_mask */
390 0x000000ff, /* dst_mask */
391 PCRELOFFSET), /* pcrel_offset */
392 /* 16-bit word relocation (16). */
393 HOWTO (R_RELWORD, /* type */
394 0, /* rightshift */
395 1, /* size (0 = byte, 1 = short, 2 = long) */
396 16, /* bitsize */
397 FALSE, /* pc_relative */
398 0, /* bitpos */
399 complain_overflow_bitfield, /* complain_on_overflow */
400 coff_amd64_reloc, /* special_function */
401 "R_X86_64_16", /* name */
402 TRUE, /* partial_inplace */
403 0x0000ffff, /* src_mask */
404 0x0000ffff, /* dst_mask */
405 PCRELOFFSET), /* pcrel_offset */
406 /* 32-bit longword relocation (17). */
407 HOWTO (R_RELLONG, /* type */
408 0, /* rightshift */
409 2, /* size (0 = byte, 1 = short, 2 = long) */
410 32, /* bitsize */
411 FALSE, /* pc_relative */
412 0, /* bitpos */
413 complain_overflow_bitfield, /* complain_on_overflow */
414 coff_amd64_reloc, /* special_function */
415 "R_X86_64_32S", /* name */
416 TRUE, /* partial_inplace */
417 0xffffffff, /* src_mask */
418 0xffffffff, /* dst_mask */
419 PCRELOFFSET), /* pcrel_offset */
420 /* Byte PC relative relocation (18). */
421 HOWTO (R_PCRBYTE, /* type */
422 0, /* rightshift */
423 0, /* size (0 = byte, 1 = short, 2 = long) */
424 8, /* bitsize */
425 TRUE, /* pc_relative */
426 0, /* bitpos */
427 complain_overflow_signed, /* complain_on_overflow */
428 coff_amd64_reloc, /* special_function */
429 "R_X86_64_PC8", /* name */
430 TRUE, /* partial_inplace */
431 0x000000ff, /* src_mask */
432 0x000000ff, /* dst_mask */
433 PCRELOFFSET), /* pcrel_offset */
434 /* 16-bit word PC relative relocation (19). */
435 HOWTO (R_PCRWORD, /* type */
436 0, /* rightshift */
437 1, /* size (0 = byte, 1 = short, 2 = long) */
438 16, /* bitsize */
439 TRUE, /* pc_relative */
440 0, /* bitpos */
441 complain_overflow_signed, /* complain_on_overflow */
442 coff_amd64_reloc, /* special_function */
443 "R_X86_64_PC16", /* name */
444 TRUE, /* partial_inplace */
445 0x0000ffff, /* src_mask */
446 0x0000ffff, /* dst_mask */
447 PCRELOFFSET), /* pcrel_offset */
448 /* 32-bit longword PC relative relocation (20). */
449 HOWTO (R_PCRLONG, /* type */
450 0, /* rightshift */
451 2, /* size (0 = byte, 1 = short, 2 = long) */
452 32, /* bitsize */
453 TRUE, /* pc_relative */
454 0, /* bitpos */
455 complain_overflow_signed, /* complain_on_overflow */
456 coff_amd64_reloc, /* special_function */
457 "R_X86_64_PC32", /* name */
458 TRUE, /* partial_inplace */
459 0xffffffff, /* src_mask */
460 0xffffffff, /* dst_mask */
461 PCRELOFFSET) /* pcrel_offset */
462 };
463
464 #define NUM_HOWTOS ARRAY_SIZE (howto_table)
465
466 /* Turn a howto into a reloc nunmber */
467
468 #define SELECT_RELOC(x,howto) { x.r_type = howto->type; }
469 #define I386 1 /* Customize coffcode.h */
470 #define AMD64 1
471
472 #define RTYPE2HOWTO(cache_ptr, dst) \
473 ((cache_ptr)->howto = \
474 ((dst)->r_type < NUM_HOWTOS) \
475 ? howto_table + (dst)->r_type \
476 : NULL)
477
478 /* For 386 COFF a STYP_NOLOAD | STYP_BSS section is part of a shared
479 library. On some other COFF targets STYP_BSS is normally
480 STYP_NOLOAD. */
481 #define BSS_NOLOAD_IS_SHARED_LIBRARY
482
483 /* Compute the addend of a reloc. If the reloc is to a common symbol,
484 the object file contains the value of the common symbol. By the
485 time this is called, the linker may be using a different symbol
486 from a different object file with a different value. Therefore, we
487 hack wildly to locate the original symbol from this file so that we
488 can make the correct adjustment. This macro sets coffsym to the
489 symbol from the original file, and uses it to set the addend value
490 correctly. If this is not a common symbol, the usual addend
491 calculation is done, except that an additional tweak is needed for
492 PC relative relocs.
493 FIXME: This macro refers to symbols and asect; these are from the
494 calling function, not the macro arguments. */
495
496 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
497 { \
498 coff_symbol_type *coffsym = NULL; \
499 \
500 if (ptr && bfd_asymbol_bfd (ptr) != abfd) \
501 coffsym = (obj_symbols (abfd) \
502 + (cache_ptr->sym_ptr_ptr - symbols)); \
503 else if (ptr) \
504 coffsym = coff_symbol_from (ptr); \
505 \
506 if (coffsym != NULL \
507 && coffsym->native->u.syment.n_scnum == 0) \
508 cache_ptr->addend = - coffsym->native->u.syment.n_value; \
509 else if (ptr && bfd_asymbol_bfd (ptr) == abfd \
510 && ptr->section != NULL) \
511 cache_ptr->addend = - (ptr->section->vma + ptr->value); \
512 else \
513 cache_ptr->addend = 0; \
514 if (ptr && reloc.r_type < NUM_HOWTOS \
515 && howto_table[reloc.r_type].pc_relative) \
516 cache_ptr->addend += asect->vma; \
517 }
518
519 /* We use the special COFF backend linker. For normal AMD64 COFF, we
520 can use the generic relocate_section routine. For PE, we need our
521 own routine. */
522
523 #if !defined(COFF_WITH_PE)
524
525 #define coff_relocate_section _bfd_coff_generic_relocate_section
526
527 #else /* COFF_WITH_PE */
528
529 /* The PE relocate section routine. The only difference between this
530 and the regular routine is that we don't want to do anything for a
531 relocatable link. */
532
533 static bfd_boolean
534 coff_pe_amd64_relocate_section (bfd *output_bfd,
535 struct bfd_link_info *info,
536 bfd *input_bfd,
537 asection *input_section,
538 bfd_byte *contents,
539 struct internal_reloc *relocs,
540 struct internal_syment *syms,
541 asection **sections)
542 {
543 if (bfd_link_relocatable (info))
544 return TRUE;
545
546 return _bfd_coff_generic_relocate_section (output_bfd, info, input_bfd,input_section, contents,relocs, syms, sections);
547 }
548
549 #define coff_relocate_section coff_pe_amd64_relocate_section
550
551 #endif /* COFF_WITH_PE */
552
553 /* Convert an rtype to howto for the COFF backend linker. */
554
555 static reloc_howto_type *
556 coff_amd64_rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
557 asection *sec,
558 struct internal_reloc *rel,
559 struct coff_link_hash_entry *h,
560 struct internal_syment *sym,
561 bfd_vma *addendp)
562 {
563 reloc_howto_type *howto;
564
565 if (rel->r_type >= NUM_HOWTOS)
566 {
567 bfd_set_error (bfd_error_bad_value);
568 return NULL;
569 }
570 howto = howto_table + rel->r_type;
571
572 #if defined(COFF_WITH_PE)
573 /* Cancel out code in _bfd_coff_generic_relocate_section. */
574 *addendp = 0;
575 if (rel->r_type >= R_AMD64_PCRLONG_1 && rel->r_type <= R_AMD64_PCRLONG_5)
576 {
577 *addendp -= (bfd_vma)(rel->r_type - R_AMD64_PCRLONG);
578 rel->r_type = R_AMD64_PCRLONG;
579 }
580 #endif
581
582 if (howto->pc_relative)
583 *addendp += sec->vma;
584
585 if (sym != NULL && sym->n_scnum == 0 && sym->n_value != 0)
586 {
587 /* This is a common symbol. The section contents include the
588 size (sym->n_value) as an addend. The relocate_section
589 function will be adding in the final value of the symbol. We
590 need to subtract out the current size in order to get the
591 correct result. */
592 BFD_ASSERT (h != NULL);
593
594 #if !defined(COFF_WITH_PE)
595 /* I think we *do* want to bypass this. If we don't, I have
596 seen some data parameters get the wrong relocation address.
597 If I link two versions with and without this section bypassed
598 and then do a binary comparison, the addresses which are
599 different can be looked up in the map. The case in which
600 this section has been bypassed has addresses which correspond
601 to values I can find in the map. */
602 *addendp -= sym->n_value;
603 #endif
604 }
605
606 #if !defined(COFF_WITH_PE)
607 /* If the output symbol is common (in which case this must be a
608 relocatable link), we need to add in the final size of the
609 common symbol. */
610 if (h != NULL && h->root.type == bfd_link_hash_common)
611 *addendp += h->root.u.c.size;
612 #endif
613
614 #if defined(COFF_WITH_PE)
615 if (howto->pc_relative)
616 {
617 *addendp -= 4;
618
619 /* If the symbol is defined, then the generic code is going to
620 add back the symbol value in order to cancel out an
621 adjustment it made to the addend. However, we set the addend
622 to 0 at the start of this function. We need to adjust here,
623 to avoid the adjustment the generic code will make. FIXME:
624 This is getting a bit hackish. */
625 if (sym != NULL && sym->n_scnum != 0)
626 *addendp -= sym->n_value;
627 }
628
629 if (rel->r_type == R_AMD64_IMAGEBASE
630 && (bfd_get_flavour (sec->output_section->owner) == bfd_target_coff_flavour))
631 *addendp -= pe_data (sec->output_section->owner)->pe_opthdr.ImageBase;
632
633 if (rel->r_type == R_AMD64_SECREL)
634 {
635 bfd_vma osect_vma;
636
637 if (h && (h->root.type == bfd_link_hash_defined
638 || h->root.type == bfd_link_hash_defweak))
639 osect_vma = h->root.u.def.section->output_section->vma;
640 else
641 {
642 asection *s;
643 int i;
644
645 /* Sigh, the only way to get the section to offset against
646 is to find it the hard way. */
647 for (s = abfd->sections, i = 1; i < sym->n_scnum; i++)
648 s = s->next;
649
650 osect_vma = s->output_section->vma;
651 }
652
653 *addendp -= osect_vma;
654 }
655 #endif
656
657 return howto;
658 }
659
660 #define coff_bfd_reloc_type_lookup coff_amd64_reloc_type_lookup
661 #define coff_bfd_reloc_name_lookup coff_amd64_reloc_name_lookup
662
663 static reloc_howto_type *
664 coff_amd64_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code)
665 {
666 switch (code)
667 {
668 case BFD_RELOC_RVA:
669 return howto_table + R_AMD64_IMAGEBASE;
670 case BFD_RELOC_32:
671 return howto_table + R_AMD64_DIR32;
672 case BFD_RELOC_64:
673 return howto_table + R_AMD64_DIR64;
674 case BFD_RELOC_64_PCREL:
675 #ifndef DONT_EXTEND_AMD64
676 return howto_table + R_AMD64_PCRQUAD;
677 #else
678 /* Fall through. */
679 #endif
680 case BFD_RELOC_32_PCREL:
681 return howto_table + R_AMD64_PCRLONG;
682 case BFD_RELOC_X86_64_32S:
683 return howto_table + R_RELLONG;
684 case BFD_RELOC_16:
685 return howto_table + R_RELWORD;
686 case BFD_RELOC_16_PCREL:
687 return howto_table + R_PCRWORD;
688 case BFD_RELOC_8:
689 return howto_table + R_RELBYTE;
690 case BFD_RELOC_8_PCREL:
691 return howto_table + R_PCRBYTE;
692 #if defined(COFF_WITH_PE)
693 case BFD_RELOC_32_SECREL:
694 return howto_table + R_AMD64_SECREL;
695 #endif
696 default:
697 BFD_FAIL ();
698 return 0;
699 }
700 }
701
702 static reloc_howto_type *
703 coff_amd64_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
704 const char *r_name)
705 {
706 unsigned int i;
707
708 for (i = 0; i < NUM_HOWTOS; i++)
709 if (howto_table[i].name != NULL
710 && strcasecmp (howto_table[i].name, r_name) == 0)
711 return &howto_table[i];
712
713 return NULL;
714 }
715
716 #define coff_rtype_to_howto coff_amd64_rtype_to_howto
717
718 #ifdef TARGET_UNDERSCORE
719
720 /* If amd64 gcc uses underscores for symbol names, then it does not use
721 a leading dot for local labels, so if TARGET_UNDERSCORE is defined
722 we treat all symbols starting with L as local. */
723
724 static bfd_boolean
725 coff_amd64_is_local_label_name (bfd *abfd, const char *name)
726 {
727 if (name[0] == 'L')
728 return TRUE;
729
730 return _bfd_coff_is_local_label_name (abfd, name);
731 }
732
733 #define coff_bfd_is_local_label_name coff_amd64_is_local_label_name
734
735 #endif /* TARGET_UNDERSCORE */
736
737 #ifndef bfd_pe_print_pdata
738 #define bfd_pe_print_pdata NULL
739 #endif
740
741 #include "coffcode.h"
742
743 #ifdef PE
744 #define amd64coff_object_p pe_bfd_object_p
745 #else
746 #define amd64coff_object_p coff_object_p
747 #endif
748
749 const bfd_target
750 #ifdef TARGET_SYM
751 TARGET_SYM =
752 #else
753 x86_64_coff_vec =
754 #endif
755 {
756 #ifdef TARGET_NAME
757 TARGET_NAME,
758 #else
759 "coff-x86-64", /* Name. */
760 #endif
761 bfd_target_coff_flavour,
762 BFD_ENDIAN_LITTLE, /* Data byte order is little. */
763 BFD_ENDIAN_LITTLE, /* Header byte order is little. */
764
765 (HAS_RELOC | EXEC_P | /* Object flags. */
766 HAS_LINENO | HAS_DEBUG |
767 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED | BFD_COMPRESS | BFD_DECOMPRESS),
768
769 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* Section flags. */
770 #if defined(COFF_WITH_PE)
771 | SEC_LINK_ONCE | SEC_LINK_DUPLICATES | SEC_READONLY | SEC_DEBUGGING
772 #endif
773 | SEC_CODE | SEC_DATA | SEC_EXCLUDE ),
774
775 #ifdef TARGET_UNDERSCORE
776 TARGET_UNDERSCORE, /* Leading underscore. */
777 #else
778 0, /* Leading underscore. */
779 #endif
780 '/', /* Ar_pad_char. */
781 15, /* Ar_max_namelen. */
782 0, /* match priority. */
783
784 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
785 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
786 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Data. */
787 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
788 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
789 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Hdrs. */
790
791 /* Note that we allow an object file to be treated as a core file as well. */
792 { _bfd_dummy_target, amd64coff_object_p, /* BFD_check_format. */
793 bfd_generic_archive_p, amd64coff_object_p },
794 { bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format. */
795 bfd_false },
796 { bfd_false, coff_write_object_contents, /* bfd_write_contents. */
797 _bfd_write_archive_contents, bfd_false },
798
799 BFD_JUMP_TABLE_GENERIC (coff),
800 BFD_JUMP_TABLE_COPY (coff),
801 BFD_JUMP_TABLE_CORE (_bfd_nocore),
802 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
803 BFD_JUMP_TABLE_SYMBOLS (coff),
804 BFD_JUMP_TABLE_RELOCS (coff),
805 BFD_JUMP_TABLE_WRITE (coff),
806 BFD_JUMP_TABLE_LINK (coff),
807 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
808
809 NULL,
810
811 COFF_SWAP_TABLE
812 };
GDB Binutils - Deliverables
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