1 /* BFD back-end for AMD 64 COFF files.
2 Copyright (C) 2006-2014 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
coff_amd64_reloc(bfd * abfd,arelent * reloc_entry,asymbol * symbol,void * data,asection * input_section ATTRIBUTE_UNUSED,bfd * output_bfd,char ** error_message ATTRIBUTE_UNUSED)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 switch (howto->size)
147 {
148 case 0:
149 {
150 char x = bfd_get_8 (abfd, addr);
151 DOIT (x);
152 bfd_put_8 (abfd, x, addr);
153 }
154 break;
155
156 case 1:
157 {
158 short x = bfd_get_16 (abfd, addr);
159 DOIT (x);
160 bfd_put_16 (abfd, (bfd_vma) x, addr);
161 }
162 break;
163
164 case 2:
165 {
166 long x = bfd_get_32 (abfd, addr);
167 DOIT (x);
168 bfd_put_32 (abfd, (bfd_vma) x, addr);
169 }
170 break;
171 case 4:
172 {
173 long long x = bfd_get_64 (abfd, addr);
174 DOIT (x);
175 bfd_put_64 (abfd, (bfd_vma) x, addr);
176 }
177 break;
178
179 default:
180 abort ();
181 }
182 }
183
184 /* Now let bfd_perform_relocation finish everything up. */
185 return bfd_reloc_continue;
186 }
187
188 #if defined(COFF_WITH_PE)
189 /* Return TRUE if this relocation should appear in the output .reloc
190 section. */
191
192 static bfd_boolean
in_reloc_p(bfd * abfd ATTRIBUTE_UNUSED,reloc_howto_type * howto)193 in_reloc_p (bfd *abfd ATTRIBUTE_UNUSED, reloc_howto_type *howto)
194 {
195 return ! howto->pc_relative && howto->type != R_AMD64_IMAGEBASE
196 && howto->type != R_AMD64_SECREL;
197 }
198 #endif /* COFF_WITH_PE */
199
200 #ifndef PCRELOFFSET
201 #define PCRELOFFSET TRUE
202 #endif
203
204 static reloc_howto_type howto_table[] =
205 {
206 EMPTY_HOWTO (0),
207 HOWTO (R_AMD64_DIR64, /* type 1*/
208 0, /* rightshift */
209 4, /* size (0 = byte, 1 = short, 2 = long, 4 = long long) */
210 64, /* bitsize */
211 FALSE, /* pc_relative */
212 0, /* bitpos */
213 complain_overflow_bitfield, /* complain_on_overflow */
214 coff_amd64_reloc, /* special_function */
215 "R_X86_64_64", /* name */
216 TRUE, /* partial_inplace */
217 0xffffffffffffffffll, /* src_mask */
218 0xffffffffffffffffll, /* dst_mask */
219 TRUE), /* pcrel_offset */
220 HOWTO (R_AMD64_DIR32, /* type 2 */
221 0, /* rightshift */
222 2, /* size (0 = byte, 1 = short, 2 = long) */
223 32, /* 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_32", /* name */
229 TRUE, /* partial_inplace */
230 0xffffffff, /* src_mask */
231 0xffffffff, /* dst_mask */
232 TRUE), /* pcrel_offset */
233 /* PE IMAGE_REL_AMD64_ADDR32NB relocation (3). */
234 HOWTO (R_AMD64_IMAGEBASE, /* type */
235 0, /* rightshift */
236 2, /* size (0 = byte, 1 = short, 2 = long) */
237 32, /* bitsize */
238 FALSE, /* pc_relative */
239 0, /* bitpos */
240 complain_overflow_bitfield, /* complain_on_overflow */
241 coff_amd64_reloc, /* special_function */
242 "rva32", /* name */
243 TRUE, /* partial_inplace */
244 0xffffffff, /* src_mask */
245 0xffffffff, /* dst_mask */
246 FALSE), /* pcrel_offset */
247 /* 32-bit longword PC relative relocation (4). */
248 HOWTO (R_AMD64_PCRLONG, /* type 4 */
249 0, /* rightshift */
250 2, /* size (0 = byte, 1 = short, 2 = long) */
251 32, /* bitsize */
252 TRUE, /* pc_relative */
253 0, /* bitpos */
254 complain_overflow_signed, /* complain_on_overflow */
255 coff_amd64_reloc, /* special_function */
256 "R_X86_64_PC32", /* name */
257 TRUE, /* partial_inplace */
258 0xffffffff, /* src_mask */
259 0xffffffff, /* dst_mask */
260 PCRELOFFSET), /* pcrel_offset */
261
262 HOWTO (R_AMD64_PCRLONG_1, /* type 5 */
263 0, /* rightshift */
264 2, /* size (0 = byte, 1 = short, 2 = long) */
265 32, /* bitsize */
266 TRUE, /* pc_relative */
267 0, /* bitpos */
268 complain_overflow_signed, /* complain_on_overflow */
269 coff_amd64_reloc, /* special_function */
270 "DISP32+1", /* name */
271 TRUE, /* partial_inplace */
272 0xffffffff, /* src_mask */
273 0xffffffff, /* dst_mask */
274 PCRELOFFSET), /* pcrel_offset */
275 HOWTO (R_AMD64_PCRLONG_2, /* type 6 */
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+2", /* name */
284 TRUE, /* partial_inplace */
285 0xffffffff, /* src_mask */
286 0xffffffff, /* dst_mask */
287 PCRELOFFSET), /* pcrel_offset */
288 HOWTO (R_AMD64_PCRLONG_3, /* type 7 */
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+3", /* name */
297 TRUE, /* partial_inplace */
298 0xffffffff, /* src_mask */
299 0xffffffff, /* dst_mask */
300 PCRELOFFSET), /* pcrel_offset */
301 HOWTO (R_AMD64_PCRLONG_4, /* type 8 */
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+4", /* name */
310 TRUE, /* partial_inplace */
311 0xffffffff, /* src_mask */
312 0xffffffff, /* dst_mask */
313 PCRELOFFSET), /* pcrel_offset */
314 HOWTO (R_AMD64_PCRLONG_5, /* type 9 */
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+5", /* name */
323 TRUE, /* partial_inplace */
324 0xffffffff, /* src_mask */
325 0xffffffff, /* dst_mask */
326 PCRELOFFSET), /* pcrel_offset */
327 EMPTY_HOWTO (10), /* R_AMD64_SECTION 10 */
328 #if defined(COFF_WITH_PE)
329 /* 32-bit longword section relative relocation (11). */
330 HOWTO (R_AMD64_SECREL, /* type */
331 0, /* rightshift */
332 2, /* size (0 = byte, 1 = short, 2 = long) */
333 32, /* bitsize */
334 FALSE, /* pc_relative */
335 0, /* bitpos */
336 complain_overflow_bitfield, /* complain_on_overflow */
337 coff_amd64_reloc, /* special_function */
338 "secrel32", /* name */
339 TRUE, /* partial_inplace */
340 0xffffffff, /* src_mask */
341 0xffffffff, /* dst_mask */
342 TRUE), /* pcrel_offset */
343 #else
344 EMPTY_HOWTO (11),
345 #endif
346 EMPTY_HOWTO (12),
347 EMPTY_HOWTO (13),
348 #ifndef DONT_EXTEND_AMD64
349 HOWTO (R_AMD64_PCRQUAD,
350 0, /* rightshift */
351 4, /* size (0 = byte, 1 = short, 2 = long) */
352 64, /* bitsize */
353 TRUE, /* pc_relative */
354 0, /* bitpos */
355 complain_overflow_signed, /* complain_on_overflow */
356 coff_amd64_reloc, /* special_function */
357 "R_X86_64_PC64", /* name */
358 TRUE, /* partial_inplace */
359 0xffffffffffffffffll, /* src_mask */
360 0xffffffffffffffffll, /* dst_mask */
361 PCRELOFFSET), /* pcrel_offset */
362 #else
363 EMPTY_HOWTO (14),
364 #endif
365 /* Byte relocation (15). */
366 HOWTO (R_RELBYTE, /* type */
367 0, /* rightshift */
368 0, /* size (0 = byte, 1 = short, 2 = long) */
369 8, /* bitsize */
370 FALSE, /* pc_relative */
371 0, /* bitpos */
372 complain_overflow_bitfield, /* complain_on_overflow */
373 coff_amd64_reloc, /* special_function */
374 "R_X86_64_8", /* name */
375 TRUE, /* partial_inplace */
376 0x000000ff, /* src_mask */
377 0x000000ff, /* dst_mask */
378 PCRELOFFSET), /* pcrel_offset */
379 /* 16-bit word relocation (16). */
380 HOWTO (R_RELWORD, /* type */
381 0, /* rightshift */
382 1, /* size (0 = byte, 1 = short, 2 = long) */
383 16, /* bitsize */
384 FALSE, /* pc_relative */
385 0, /* bitpos */
386 complain_overflow_bitfield, /* complain_on_overflow */
387 coff_amd64_reloc, /* special_function */
388 "R_X86_64_16", /* name */
389 TRUE, /* partial_inplace */
390 0x0000ffff, /* src_mask */
391 0x0000ffff, /* dst_mask */
392 PCRELOFFSET), /* pcrel_offset */
393 /* 32-bit longword relocation (17). */
394 HOWTO (R_RELLONG, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 32, /* bitsize */
398 FALSE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_bitfield, /* complain_on_overflow */
401 coff_amd64_reloc, /* special_function */
402 "R_X86_64_32S", /* name */
403 TRUE, /* partial_inplace */
404 0xffffffff, /* src_mask */
405 0xffffffff, /* dst_mask */
406 PCRELOFFSET), /* pcrel_offset */
407 /* Byte PC relative relocation (18). */
408 HOWTO (R_PCRBYTE, /* type */
409 0, /* rightshift */
410 0, /* size (0 = byte, 1 = short, 2 = long) */
411 8, /* bitsize */
412 TRUE, /* pc_relative */
413 0, /* bitpos */
414 complain_overflow_signed, /* complain_on_overflow */
415 coff_amd64_reloc, /* special_function */
416 "R_X86_64_PC8", /* name */
417 TRUE, /* partial_inplace */
418 0x000000ff, /* src_mask */
419 0x000000ff, /* dst_mask */
420 PCRELOFFSET), /* pcrel_offset */
421 /* 16-bit word PC relative relocation (19). */
422 HOWTO (R_PCRWORD, /* type */
423 0, /* rightshift */
424 1, /* size (0 = byte, 1 = short, 2 = long) */
425 16, /* bitsize */
426 TRUE, /* pc_relative */
427 0, /* bitpos */
428 complain_overflow_signed, /* complain_on_overflow */
429 coff_amd64_reloc, /* special_function */
430 "R_X86_64_PC16", /* name */
431 TRUE, /* partial_inplace */
432 0x0000ffff, /* src_mask */
433 0x0000ffff, /* dst_mask */
434 PCRELOFFSET), /* pcrel_offset */
435 /* 32-bit longword PC relative relocation (20). */
436 HOWTO (R_PCRLONG, /* type */
437 0, /* rightshift */
438 2, /* size (0 = byte, 1 = short, 2 = long) */
439 32, /* bitsize */
440 TRUE, /* pc_relative */
441 0, /* bitpos */
442 complain_overflow_signed, /* complain_on_overflow */
443 coff_amd64_reloc, /* special_function */
444 "R_X86_64_PC32", /* name */
445 TRUE, /* partial_inplace */
446 0xffffffff, /* src_mask */
447 0xffffffff, /* dst_mask */
448 PCRELOFFSET) /* pcrel_offset */
449 };
450
451 #define NUM_HOWTOS ARRAY_SIZE (howto_table)
452
453 /* Turn a howto into a reloc nunmber */
454
455 #define SELECT_RELOC(x,howto) { x.r_type = howto->type; }
456 #define I386 1 /* Customize coffcode.h */
457 #define AMD64 1
458
459 #define RTYPE2HOWTO(cache_ptr, dst) \
460 ((cache_ptr)->howto = \
461 ((dst)->r_type < NUM_HOWTOS) \
462 ? howto_table + (dst)->r_type \
463 : NULL)
464
465 /* For 386 COFF a STYP_NOLOAD | STYP_BSS section is part of a shared
466 library. On some other COFF targets STYP_BSS is normally
467 STYP_NOLOAD. */
468 #define BSS_NOLOAD_IS_SHARED_LIBRARY
469
470 /* Compute the addend of a reloc. If the reloc is to a common symbol,
471 the object file contains the value of the common symbol. By the
472 time this is called, the linker may be using a different symbol
473 from a different object file with a different value. Therefore, we
474 hack wildly to locate the original symbol from this file so that we
475 can make the correct adjustment. This macro sets coffsym to the
476 symbol from the original file, and uses it to set the addend value
477 correctly. If this is not a common symbol, the usual addend
478 calculation is done, except that an additional tweak is needed for
479 PC relative relocs.
480 FIXME: This macro refers to symbols and asect; these are from the
481 calling function, not the macro arguments. */
482
483 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
484 { \
485 coff_symbol_type *coffsym = NULL; \
486 \
487 if (ptr && bfd_asymbol_bfd (ptr) != abfd) \
488 coffsym = (obj_symbols (abfd) \
489 + (cache_ptr->sym_ptr_ptr - symbols)); \
490 else if (ptr) \
491 coffsym = coff_symbol_from (abfd, ptr); \
492 \
493 if (coffsym != NULL \
494 && coffsym->native->u.syment.n_scnum == 0) \
495 cache_ptr->addend = - coffsym->native->u.syment.n_value; \
496 else if (ptr && bfd_asymbol_bfd (ptr) == abfd \
497 && ptr->section != NULL) \
498 cache_ptr->addend = - (ptr->section->vma + ptr->value); \
499 else \
500 cache_ptr->addend = 0; \
501 if (ptr && reloc.r_type < NUM_HOWTOS \
502 && howto_table[reloc.r_type].pc_relative) \
503 cache_ptr->addend += asect->vma; \
504 }
505
506 /* We use the special COFF backend linker. For normal AMD64 COFF, we
507 can use the generic relocate_section routine. For PE, we need our
508 own routine. */
509
510 #if !defined(COFF_WITH_PE)
511
512 #define coff_relocate_section _bfd_coff_generic_relocate_section
513
514 #else /* COFF_WITH_PE */
515
516 /* The PE relocate section routine. The only difference between this
517 and the regular routine is that we don't want to do anything for a
518 relocatable link. */
519
520 static bfd_boolean
coff_pe_amd64_relocate_section(bfd * output_bfd,struct bfd_link_info * info,bfd * input_bfd,asection * input_section,bfd_byte * contents,struct internal_reloc * relocs,struct internal_syment * syms,asection ** sections)521 coff_pe_amd64_relocate_section (bfd *output_bfd,
522 struct bfd_link_info *info,
523 bfd *input_bfd,
524 asection *input_section,
525 bfd_byte *contents,
526 struct internal_reloc *relocs,
527 struct internal_syment *syms,
528 asection **sections)
529 {
530 if (info->relocatable)
531 return TRUE;
532
533 return _bfd_coff_generic_relocate_section (output_bfd, info, input_bfd,input_section, contents,relocs, syms, sections);
534 }
535
536 #define coff_relocate_section coff_pe_amd64_relocate_section
537
538 #endif /* COFF_WITH_PE */
539
540 /* Convert an rtype to howto for the COFF backend linker. */
541
542 static reloc_howto_type *
coff_amd64_rtype_to_howto(bfd * abfd ATTRIBUTE_UNUSED,asection * sec,struct internal_reloc * rel,struct coff_link_hash_entry * h,struct internal_syment * sym,bfd_vma * addendp)543 coff_amd64_rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
544 asection *sec,
545 struct internal_reloc *rel,
546 struct coff_link_hash_entry *h,
547 struct internal_syment *sym,
548 bfd_vma *addendp)
549 {
550 reloc_howto_type *howto;
551
552 if (rel->r_type >= NUM_HOWTOS)
553 {
554 bfd_set_error (bfd_error_bad_value);
555 return NULL;
556 }
557 howto = howto_table + rel->r_type;
558
559 #if defined(COFF_WITH_PE)
560 /* Cancel out code in _bfd_coff_generic_relocate_section. */
561 *addendp = 0;
562 if (rel->r_type >= R_AMD64_PCRLONG_1 && rel->r_type <= R_AMD64_PCRLONG_5)
563 {
564 *addendp -= (bfd_vma)(rel->r_type - R_AMD64_PCRLONG);
565 rel->r_type = R_AMD64_PCRLONG;
566 }
567 #endif
568
569 if (howto->pc_relative)
570 *addendp += sec->vma;
571
572 if (sym != NULL && sym->n_scnum == 0 && sym->n_value != 0)
573 {
574 /* This is a common symbol. The section contents include the
575 size (sym->n_value) as an addend. The relocate_section
576 function will be adding in the final value of the symbol. We
577 need to subtract out the current size in order to get the
578 correct result. */
579 BFD_ASSERT (h != NULL);
580
581 #if !defined(COFF_WITH_PE)
582 /* I think we *do* want to bypass this. If we don't, I have
583 seen some data parameters get the wrong relocation address.
584 If I link two versions with and without this section bypassed
585 and then do a binary comparison, the addresses which are
586 different can be looked up in the map. The case in which
587 this section has been bypassed has addresses which correspond
588 to values I can find in the map. */
589 *addendp -= sym->n_value;
590 #endif
591 }
592
593 #if !defined(COFF_WITH_PE)
594 /* If the output symbol is common (in which case this must be a
595 relocatable link), we need to add in the final size of the
596 common symbol. */
597 if (h != NULL && h->root.type == bfd_link_hash_common)
598 *addendp += h->root.u.c.size;
599 #endif
600
601 #if defined(COFF_WITH_PE)
602 if (howto->pc_relative)
603 {
604 *addendp -= 4;
605
606 /* If the symbol is defined, then the generic code is going to
607 add back the symbol value in order to cancel out an
608 adjustment it made to the addend. However, we set the addend
609 to 0 at the start of this function. We need to adjust here,
610 to avoid the adjustment the generic code will make. FIXME:
611 This is getting a bit hackish. */
612 if (sym != NULL && sym->n_scnum != 0)
613 *addendp -= sym->n_value;
614 }
615
616 if (rel->r_type == R_AMD64_IMAGEBASE
617 && (bfd_get_flavour (sec->output_section->owner) == bfd_target_coff_flavour))
618 *addendp -= pe_data (sec->output_section->owner)->pe_opthdr.ImageBase;
619
620 if (rel->r_type == R_AMD64_SECREL)
621 {
622 bfd_vma osect_vma;
623
624 if (h && (h->root.type == bfd_link_hash_defined
625 || h->root.type == bfd_link_hash_defweak))
626 osect_vma = h->root.u.def.section->output_section->vma;
627 else
628 {
629 asection *s;
630 int i;
631
632 /* Sigh, the only way to get the section to offset against
633 is to find it the hard way. */
634 for (s = abfd->sections, i = 1; i < sym->n_scnum; i++)
635 s = s->next;
636
637 osect_vma = s->output_section->vma;
638 }
639
640 *addendp -= osect_vma;
641 }
642 #endif
643
644 return howto;
645 }
646
647 #define coff_bfd_reloc_type_lookup coff_amd64_reloc_type_lookup
648 #define coff_bfd_reloc_name_lookup coff_amd64_reloc_name_lookup
649
650 static reloc_howto_type *
coff_amd64_reloc_type_lookup(bfd * abfd ATTRIBUTE_UNUSED,bfd_reloc_code_real_type code)651 coff_amd64_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code)
652 {
653 switch (code)
654 {
655 case BFD_RELOC_RVA:
656 return howto_table + R_AMD64_IMAGEBASE;
657 case BFD_RELOC_32:
658 return howto_table + R_AMD64_DIR32;
659 case BFD_RELOC_64:
660 return howto_table + R_AMD64_DIR64;
661 case BFD_RELOC_64_PCREL:
662 #ifndef DONT_EXTEND_AMD64
663 return howto_table + R_AMD64_PCRQUAD;
664 #else
665 /* Fall through. */
666 #endif
667 case BFD_RELOC_32_PCREL:
668 return howto_table + R_AMD64_PCRLONG;
669 case BFD_RELOC_X86_64_32S:
670 return howto_table + R_RELLONG;
671 case BFD_RELOC_16:
672 return howto_table + R_RELWORD;
673 case BFD_RELOC_16_PCREL:
674 return howto_table + R_PCRWORD;
675 case BFD_RELOC_8:
676 return howto_table + R_RELBYTE;
677 case BFD_RELOC_8_PCREL:
678 return howto_table + R_PCRBYTE;
679 #if defined(COFF_WITH_PE)
680 case BFD_RELOC_32_SECREL:
681 return howto_table + R_AMD64_SECREL;
682 #endif
683 default:
684 BFD_FAIL ();
685 return 0;
686 }
687 }
688
689 static reloc_howto_type *
coff_amd64_reloc_name_lookup(bfd * abfd ATTRIBUTE_UNUSED,const char * r_name)690 coff_amd64_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
691 const char *r_name)
692 {
693 unsigned int i;
694
695 for (i = 0; i < NUM_HOWTOS; i++)
696 if (howto_table[i].name != NULL
697 && strcasecmp (howto_table[i].name, r_name) == 0)
698 return &howto_table[i];
699
700 return NULL;
701 }
702
703 #define coff_rtype_to_howto coff_amd64_rtype_to_howto
704
705 #ifdef TARGET_UNDERSCORE
706
707 /* If amd64 gcc uses underscores for symbol names, then it does not use
708 a leading dot for local labels, so if TARGET_UNDERSCORE is defined
709 we treat all symbols starting with L as local. */
710
711 static bfd_boolean
coff_amd64_is_local_label_name(bfd * abfd,const char * name)712 coff_amd64_is_local_label_name (bfd *abfd, const char *name)
713 {
714 if (name[0] == 'L')
715 return TRUE;
716
717 return _bfd_coff_is_local_label_name (abfd, name);
718 }
719
720 #define coff_bfd_is_local_label_name coff_amd64_is_local_label_name
721
722 #endif /* TARGET_UNDERSCORE */
723
724 #ifndef bfd_pe_print_pdata
725 #define bfd_pe_print_pdata NULL
726 #endif
727
728 #include "coffcode.h"
729
730 #ifdef PE
731 #define amd64coff_object_p pe_bfd_object_p
732 #else
733 #define amd64coff_object_p coff_object_p
734 #endif
735
736 const bfd_target
737 #ifdef TARGET_SYM
738 TARGET_SYM =
739 #else
740 x86_64_coff_vec =
741 #endif
742 {
743 #ifdef TARGET_NAME
744 TARGET_NAME,
745 #else
746 "coff-x86-64", /* Name. */
747 #endif
748 bfd_target_coff_flavour,
749 BFD_ENDIAN_LITTLE, /* Data byte order is little. */
750 BFD_ENDIAN_LITTLE, /* Header byte order is little. */
751
752 (HAS_RELOC | EXEC_P | /* Object flags. */
753 HAS_LINENO | HAS_DEBUG |
754 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED | BFD_COMPRESS | BFD_DECOMPRESS),
755
756 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* Section flags. */
757 #if defined(COFF_WITH_PE)
758 | SEC_LINK_ONCE | SEC_LINK_DUPLICATES | SEC_READONLY | SEC_DEBUGGING
759 #endif
760 | SEC_CODE | SEC_DATA | SEC_EXCLUDE ),
761
762 #ifdef TARGET_UNDERSCORE
763 TARGET_UNDERSCORE, /* Leading underscore. */
764 #else
765 0, /* Leading underscore. */
766 #endif
767 '/', /* Ar_pad_char. */
768 15, /* Ar_max_namelen. */
769 0, /* match priority. */
770
771 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
772 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
773 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Data. */
774 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
775 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
776 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Hdrs. */
777
778 /* Note that we allow an object file to be treated as a core file as well. */
779 { _bfd_dummy_target, amd64coff_object_p, /* BFD_check_format. */
780 bfd_generic_archive_p, amd64coff_object_p },
781 { bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format. */
782 bfd_false },
783 { bfd_false, coff_write_object_contents, /* bfd_write_contents. */
784 _bfd_write_archive_contents, bfd_false },
785
786 BFD_JUMP_TABLE_GENERIC (coff),
787 BFD_JUMP_TABLE_COPY (coff),
788 BFD_JUMP_TABLE_CORE (_bfd_nocore),
789 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
790 BFD_JUMP_TABLE_SYMBOLS (coff),
791 BFD_JUMP_TABLE_RELOCS (coff),
792 BFD_JUMP_TABLE_WRITE (coff),
793 BFD_JUMP_TABLE_LINK (coff),
794 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
795
796 NULL,
797
798 COFF_SWAP_TABLE
799 };
800