1 /* BFD back-end for AMD 64 COFF files.
2 Copyright (C) 2006-2018 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 if (! bfd_reloc_offset_in_range (howto, abfd, input_section,
147 reloc_entry->address
148 * bfd_octets_per_byte (abfd)))
149 return bfd_reloc_outofrange;
150
151 switch (howto->size)
152 {
153 case 0:
154 {
155 char x = bfd_get_8 (abfd, addr);
156 DOIT (x);
157 bfd_put_8 (abfd, x, addr);
158 }
159 break;
160
161 case 1:
162 {
163 short x = bfd_get_16 (abfd, addr);
164 DOIT (x);
165 bfd_put_16 (abfd, (bfd_vma) x, addr);
166 }
167 break;
168
169 case 2:
170 {
171 long x = bfd_get_32 (abfd, addr);
172 DOIT (x);
173 bfd_put_32 (abfd, (bfd_vma) x, addr);
174 }
175 break;
176
177 case 4:
178 {
179 bfd_uint64_t x = bfd_get_64 (abfd, addr);
180 DOIT (x);
181 bfd_put_64 (abfd, x, addr);
182 }
183 break;
184
185 default:
186 bfd_set_error (bfd_error_bad_value);
187 return bfd_reloc_notsupported;
188 }
189 }
190
191 /* Now let bfd_perform_relocation finish everything up. */
192 return bfd_reloc_continue;
193 }
194
195 #if defined(COFF_WITH_PE)
196 /* Return TRUE if this relocation should appear in the output .reloc
197 section. */
198
199 static bfd_boolean
in_reloc_p(bfd * abfd ATTRIBUTE_UNUSED,reloc_howto_type * howto)200 in_reloc_p (bfd *abfd ATTRIBUTE_UNUSED, reloc_howto_type *howto)
201 {
202 return ! howto->pc_relative && howto->type != R_AMD64_IMAGEBASE
203 && howto->type != R_AMD64_SECREL;
204 }
205 #endif /* COFF_WITH_PE */
206
207 #ifndef PCRELOFFSET
208 #define PCRELOFFSET TRUE
209 #endif
210
211 static reloc_howto_type howto_table[] =
212 {
213 EMPTY_HOWTO (0),
214 HOWTO (R_AMD64_DIR64, /* type 1*/
215 0, /* rightshift */
216 4, /* size (0 = byte, 1 = short, 2 = long, 4 = long long) */
217 64, /* 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_64", /* name */
223 TRUE, /* partial_inplace */
224 0xffffffffffffffffll, /* src_mask */
225 0xffffffffffffffffll, /* dst_mask */
226 TRUE), /* pcrel_offset */
227 HOWTO (R_AMD64_DIR32, /* type 2 */
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 "R_X86_64_32", /* name */
236 TRUE, /* partial_inplace */
237 0xffffffff, /* src_mask */
238 0xffffffff, /* dst_mask */
239 TRUE), /* pcrel_offset */
240 /* PE IMAGE_REL_AMD64_ADDR32NB relocation (3). */
241 HOWTO (R_AMD64_IMAGEBASE, /* type */
242 0, /* rightshift */
243 2, /* size (0 = byte, 1 = short, 2 = long) */
244 32, /* bitsize */
245 FALSE, /* pc_relative */
246 0, /* bitpos */
247 complain_overflow_bitfield, /* complain_on_overflow */
248 coff_amd64_reloc, /* special_function */
249 "rva32", /* name */
250 TRUE, /* partial_inplace */
251 0xffffffff, /* src_mask */
252 0xffffffff, /* dst_mask */
253 FALSE), /* pcrel_offset */
254 /* 32-bit longword PC relative relocation (4). */
255 HOWTO (R_AMD64_PCRLONG, /* type 4 */
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 "R_X86_64_PC32", /* name */
264 TRUE, /* partial_inplace */
265 0xffffffff, /* src_mask */
266 0xffffffff, /* dst_mask */
267 PCRELOFFSET), /* pcrel_offset */
268
269 HOWTO (R_AMD64_PCRLONG_1, /* type 5 */
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+1", /* name */
278 TRUE, /* partial_inplace */
279 0xffffffff, /* src_mask */
280 0xffffffff, /* dst_mask */
281 PCRELOFFSET), /* pcrel_offset */
282 HOWTO (R_AMD64_PCRLONG_2, /* type 6 */
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+2", /* name */
291 TRUE, /* partial_inplace */
292 0xffffffff, /* src_mask */
293 0xffffffff, /* dst_mask */
294 PCRELOFFSET), /* pcrel_offset */
295 HOWTO (R_AMD64_PCRLONG_3, /* type 7 */
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+3", /* name */
304 TRUE, /* partial_inplace */
305 0xffffffff, /* src_mask */
306 0xffffffff, /* dst_mask */
307 PCRELOFFSET), /* pcrel_offset */
308 HOWTO (R_AMD64_PCRLONG_4, /* type 8 */
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+4", /* name */
317 TRUE, /* partial_inplace */
318 0xffffffff, /* src_mask */
319 0xffffffff, /* dst_mask */
320 PCRELOFFSET), /* pcrel_offset */
321 HOWTO (R_AMD64_PCRLONG_5, /* type 9 */
322 0, /* rightshift */
323 2, /* size (0 = byte, 1 = short, 2 = long) */
324 32, /* bitsize */
325 TRUE, /* pc_relative */
326 0, /* bitpos */
327 complain_overflow_signed, /* complain_on_overflow */
328 coff_amd64_reloc, /* special_function */
329 "DISP32+5", /* name */
330 TRUE, /* partial_inplace */
331 0xffffffff, /* src_mask */
332 0xffffffff, /* dst_mask */
333 PCRELOFFSET), /* pcrel_offset */
334 EMPTY_HOWTO (10), /* R_AMD64_SECTION 10 */
335 #if defined(COFF_WITH_PE)
336 /* 32-bit longword section relative relocation (11). */
337 HOWTO (R_AMD64_SECREL, /* type */
338 0, /* rightshift */
339 2, /* size (0 = byte, 1 = short, 2 = long) */
340 32, /* bitsize */
341 FALSE, /* pc_relative */
342 0, /* bitpos */
343 complain_overflow_bitfield, /* complain_on_overflow */
344 coff_amd64_reloc, /* special_function */
345 "secrel32", /* name */
346 TRUE, /* partial_inplace */
347 0xffffffff, /* src_mask */
348 0xffffffff, /* dst_mask */
349 TRUE), /* pcrel_offset */
350 #else
351 EMPTY_HOWTO (11),
352 #endif
353 EMPTY_HOWTO (12),
354 EMPTY_HOWTO (13),
355 #ifndef DONT_EXTEND_AMD64
356 HOWTO (R_AMD64_PCRQUAD,
357 0, /* rightshift */
358 4, /* size (0 = byte, 1 = short, 2 = long) */
359 64, /* bitsize */
360 TRUE, /* pc_relative */
361 0, /* bitpos */
362 complain_overflow_signed, /* complain_on_overflow */
363 coff_amd64_reloc, /* special_function */
364 "R_X86_64_PC64", /* name */
365 TRUE, /* partial_inplace */
366 0xffffffffffffffffll, /* src_mask */
367 0xffffffffffffffffll, /* dst_mask */
368 PCRELOFFSET), /* pcrel_offset */
369 #else
370 EMPTY_HOWTO (14),
371 #endif
372 /* Byte relocation (15). */
373 HOWTO (R_RELBYTE, /* type */
374 0, /* rightshift */
375 0, /* size (0 = byte, 1 = short, 2 = long) */
376 8, /* 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_8", /* name */
382 TRUE, /* partial_inplace */
383 0x000000ff, /* src_mask */
384 0x000000ff, /* dst_mask */
385 PCRELOFFSET), /* pcrel_offset */
386 /* 16-bit word relocation (16). */
387 HOWTO (R_RELWORD, /* type */
388 0, /* rightshift */
389 1, /* size (0 = byte, 1 = short, 2 = long) */
390 16, /* 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_16", /* name */
396 TRUE, /* partial_inplace */
397 0x0000ffff, /* src_mask */
398 0x0000ffff, /* dst_mask */
399 PCRELOFFSET), /* pcrel_offset */
400 /* 32-bit longword relocation (17). */
401 HOWTO (R_RELLONG, /* type */
402 0, /* rightshift */
403 2, /* size (0 = byte, 1 = short, 2 = long) */
404 32, /* bitsize */
405 FALSE, /* pc_relative */
406 0, /* bitpos */
407 complain_overflow_bitfield, /* complain_on_overflow */
408 coff_amd64_reloc, /* special_function */
409 "R_X86_64_32S", /* name */
410 TRUE, /* partial_inplace */
411 0xffffffff, /* src_mask */
412 0xffffffff, /* dst_mask */
413 PCRELOFFSET), /* pcrel_offset */
414 /* Byte PC relative relocation (18). */
415 HOWTO (R_PCRBYTE, /* type */
416 0, /* rightshift */
417 0, /* size (0 = byte, 1 = short, 2 = long) */
418 8, /* 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_PC8", /* name */
424 TRUE, /* partial_inplace */
425 0x000000ff, /* src_mask */
426 0x000000ff, /* dst_mask */
427 PCRELOFFSET), /* pcrel_offset */
428 /* 16-bit word PC relative relocation (19). */
429 HOWTO (R_PCRWORD, /* type */
430 0, /* rightshift */
431 1, /* size (0 = byte, 1 = short, 2 = long) */
432 16, /* 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_PC16", /* name */
438 TRUE, /* partial_inplace */
439 0x0000ffff, /* src_mask */
440 0x0000ffff, /* dst_mask */
441 PCRELOFFSET), /* pcrel_offset */
442 /* 32-bit longword PC relative relocation (20). */
443 HOWTO (R_PCRLONG, /* type */
444 0, /* rightshift */
445 2, /* size (0 = byte, 1 = short, 2 = long) */
446 32, /* bitsize */
447 TRUE, /* pc_relative */
448 0, /* bitpos */
449 complain_overflow_signed, /* complain_on_overflow */
450 coff_amd64_reloc, /* special_function */
451 "R_X86_64_PC32", /* name */
452 TRUE, /* partial_inplace */
453 0xffffffff, /* src_mask */
454 0xffffffff, /* dst_mask */
455 PCRELOFFSET) /* pcrel_offset */
456 };
457
458 #define NUM_HOWTOS ARRAY_SIZE (howto_table)
459
460 /* Turn a howto into a reloc nunmber */
461
462 #define SELECT_RELOC(x,howto) { x.r_type = howto->type; }
463 #define I386 1 /* Customize coffcode.h */
464 #define AMD64 1
465
466 #define RTYPE2HOWTO(cache_ptr, dst) \
467 ((cache_ptr)->howto = \
468 ((dst)->r_type < NUM_HOWTOS) \
469 ? howto_table + (dst)->r_type \
470 : NULL)
471
472 /* For 386 COFF a STYP_NOLOAD | STYP_BSS section is part of a shared
473 library. On some other COFF targets STYP_BSS is normally
474 STYP_NOLOAD. */
475 #define BSS_NOLOAD_IS_SHARED_LIBRARY
476
477 /* Compute the addend of a reloc. If the reloc is to a common symbol,
478 the object file contains the value of the common symbol. By the
479 time this is called, the linker may be using a different symbol
480 from a different object file with a different value. Therefore, we
481 hack wildly to locate the original symbol from this file so that we
482 can make the correct adjustment. This macro sets coffsym to the
483 symbol from the original file, and uses it to set the addend value
484 correctly. If this is not a common symbol, the usual addend
485 calculation is done, except that an additional tweak is needed for
486 PC relative relocs.
487 FIXME: This macro refers to symbols and asect; these are from the
488 calling function, not the macro arguments. */
489
490 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
491 { \
492 coff_symbol_type *coffsym = NULL; \
493 \
494 if (ptr && bfd_asymbol_bfd (ptr) != abfd) \
495 coffsym = (obj_symbols (abfd) \
496 + (cache_ptr->sym_ptr_ptr - symbols)); \
497 else if (ptr) \
498 coffsym = coff_symbol_from (ptr); \
499 \
500 if (coffsym != NULL \
501 && coffsym->native->u.syment.n_scnum == 0) \
502 cache_ptr->addend = - coffsym->native->u.syment.n_value; \
503 else if (ptr && bfd_asymbol_bfd (ptr) == abfd \
504 && ptr->section != NULL) \
505 cache_ptr->addend = - (ptr->section->vma + ptr->value); \
506 else \
507 cache_ptr->addend = 0; \
508 if (ptr && reloc.r_type < NUM_HOWTOS \
509 && howto_table[reloc.r_type].pc_relative) \
510 cache_ptr->addend += asect->vma; \
511 }
512
513 /* We use the special COFF backend linker. For normal AMD64 COFF, we
514 can use the generic relocate_section routine. For PE, we need our
515 own routine. */
516
517 #if !defined(COFF_WITH_PE)
518
519 #define coff_relocate_section _bfd_coff_generic_relocate_section
520
521 #else /* COFF_WITH_PE */
522
523 /* The PE relocate section routine. The only difference between this
524 and the regular routine is that we don't want to do anything for a
525 relocatable link. */
526
527 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)528 coff_pe_amd64_relocate_section (bfd *output_bfd,
529 struct bfd_link_info *info,
530 bfd *input_bfd,
531 asection *input_section,
532 bfd_byte *contents,
533 struct internal_reloc *relocs,
534 struct internal_syment *syms,
535 asection **sections)
536 {
537 if (bfd_link_relocatable (info))
538 return TRUE;
539
540 return _bfd_coff_generic_relocate_section (output_bfd, info, input_bfd,input_section, contents,relocs, syms, sections);
541 }
542
543 #define coff_relocate_section coff_pe_amd64_relocate_section
544
545 #endif /* COFF_WITH_PE */
546
547 /* Convert an rtype to howto for the COFF backend linker. */
548
549 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)550 coff_amd64_rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
551 asection *sec,
552 struct internal_reloc *rel,
553 struct coff_link_hash_entry *h,
554 struct internal_syment *sym,
555 bfd_vma *addendp)
556 {
557 reloc_howto_type *howto;
558
559 if (rel->r_type >= NUM_HOWTOS)
560 {
561 bfd_set_error (bfd_error_bad_value);
562 return NULL;
563 }
564 howto = howto_table + rel->r_type;
565
566 #if defined(COFF_WITH_PE)
567 /* Cancel out code in _bfd_coff_generic_relocate_section. */
568 *addendp = 0;
569 if (rel->r_type >= R_AMD64_PCRLONG_1 && rel->r_type <= R_AMD64_PCRLONG_5)
570 {
571 *addendp -= (bfd_vma)(rel->r_type - R_AMD64_PCRLONG);
572 rel->r_type = R_AMD64_PCRLONG;
573 }
574 #endif
575
576 if (howto->pc_relative)
577 *addendp += sec->vma;
578
579 if (sym != NULL && sym->n_scnum == 0 && sym->n_value != 0)
580 {
581 /* This is a common symbol. The section contents include the
582 size (sym->n_value) as an addend. The relocate_section
583 function will be adding in the final value of the symbol. We
584 need to subtract out the current size in order to get the
585 correct result. */
586 BFD_ASSERT (h != NULL);
587
588 #if !defined(COFF_WITH_PE)
589 /* I think we *do* want to bypass this. If we don't, I have
590 seen some data parameters get the wrong relocation address.
591 If I link two versions with and without this section bypassed
592 and then do a binary comparison, the addresses which are
593 different can be looked up in the map. The case in which
594 this section has been bypassed has addresses which correspond
595 to values I can find in the map. */
596 *addendp -= sym->n_value;
597 #endif
598 }
599
600 #if !defined(COFF_WITH_PE)
601 /* If the output symbol is common (in which case this must be a
602 relocatable link), we need to add in the final size of the
603 common symbol. */
604 if (h != NULL && h->root.type == bfd_link_hash_common)
605 *addendp += h->root.u.c.size;
606 #endif
607
608 #if defined(COFF_WITH_PE)
609 if (howto->pc_relative)
610 {
611 #ifndef DONT_EXTEND_AMD64
612 if (rel->r_type == R_AMD64_PCRQUAD)
613 *addendp -= 8;
614 else
615 #endif
616 *addendp -= 4;
617
618 /* If the symbol is defined, then the generic code is going to
619 add back the symbol value in order to cancel out an
620 adjustment it made to the addend. However, we set the addend
621 to 0 at the start of this function. We need to adjust here,
622 to avoid the adjustment the generic code will make. FIXME:
623 This is getting a bit hackish. */
624 if (sym != NULL && sym->n_scnum != 0)
625 *addendp -= sym->n_value;
626 }
627
628 if (rel->r_type == R_AMD64_IMAGEBASE
629 && (bfd_get_flavour (sec->output_section->owner) == bfd_target_coff_flavour))
630 *addendp -= pe_data (sec->output_section->owner)->pe_opthdr.ImageBase;
631
632 if (rel->r_type == R_AMD64_SECREL)
633 {
634 bfd_vma osect_vma;
635
636 if (h && (h->root.type == bfd_link_hash_defined
637 || h->root.type == bfd_link_hash_defweak))
638 osect_vma = h->root.u.def.section->output_section->vma;
639 else
640 {
641 asection *s;
642 int i;
643
644 /* Sigh, the only way to get the section to offset against
645 is to find it the hard way. */
646 for (s = abfd->sections, i = 1; i < sym->n_scnum; i++)
647 s = s->next;
648
649 osect_vma = s->output_section->vma;
650 }
651
652 *addendp -= osect_vma;
653 }
654 #endif
655
656 return howto;
657 }
658
659 #define coff_bfd_reloc_type_lookup coff_amd64_reloc_type_lookup
660 #define coff_bfd_reloc_name_lookup coff_amd64_reloc_name_lookup
661
662 static reloc_howto_type *
coff_amd64_reloc_type_lookup(bfd * abfd ATTRIBUTE_UNUSED,bfd_reloc_code_real_type code)663 coff_amd64_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code)
664 {
665 switch (code)
666 {
667 case BFD_RELOC_RVA:
668 return howto_table + R_AMD64_IMAGEBASE;
669 case BFD_RELOC_32:
670 return howto_table + R_AMD64_DIR32;
671 case BFD_RELOC_64:
672 return howto_table + R_AMD64_DIR64;
673 case BFD_RELOC_64_PCREL:
674 #ifndef DONT_EXTEND_AMD64
675 return howto_table + R_AMD64_PCRQUAD;
676 #else
677 /* Fall through. */
678 #endif
679 case BFD_RELOC_32_PCREL:
680 return howto_table + R_AMD64_PCRLONG;
681 case BFD_RELOC_X86_64_32S:
682 return howto_table + R_RELLONG;
683 case BFD_RELOC_16:
684 return howto_table + R_RELWORD;
685 case BFD_RELOC_16_PCREL:
686 return howto_table + R_PCRWORD;
687 case BFD_RELOC_8:
688 return howto_table + R_RELBYTE;
689 case BFD_RELOC_8_PCREL:
690 return howto_table + R_PCRBYTE;
691 #if defined(COFF_WITH_PE)
692 case BFD_RELOC_32_SECREL:
693 return howto_table + R_AMD64_SECREL;
694 #endif
695 default:
696 BFD_FAIL ();
697 return 0;
698 }
699 }
700
701 static reloc_howto_type *
coff_amd64_reloc_name_lookup(bfd * abfd ATTRIBUTE_UNUSED,const char * r_name)702 coff_amd64_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
703 const char *r_name)
704 {
705 unsigned int i;
706
707 for (i = 0; i < NUM_HOWTOS; i++)
708 if (howto_table[i].name != NULL
709 && strcasecmp (howto_table[i].name, r_name) == 0)
710 return &howto_table[i];
711
712 return NULL;
713 }
714
715 #define coff_rtype_to_howto coff_amd64_rtype_to_howto
716
717 #ifdef TARGET_UNDERSCORE
718
719 /* If amd64 gcc uses underscores for symbol names, then it does not use
720 a leading dot for local labels, so if TARGET_UNDERSCORE is defined
721 we treat all symbols starting with L as local. */
722
723 static bfd_boolean
coff_amd64_is_local_label_name(bfd * abfd,const char * name)724 coff_amd64_is_local_label_name (bfd *abfd, const char *name)
725 {
726 if (name[0] == 'L')
727 return TRUE;
728
729 return _bfd_coff_is_local_label_name (abfd, name);
730 }
731
732 #define coff_bfd_is_local_label_name coff_amd64_is_local_label_name
733
734 #endif /* TARGET_UNDERSCORE */
735
736 #ifndef bfd_pe_print_pdata
737 #define bfd_pe_print_pdata NULL
738 #endif
739
740 #include "coffcode.h"
741
742 #ifdef PE
743 #define amd64coff_object_p pe_bfd_object_p
744 #else
745 #define amd64coff_object_p coff_object_p
746 #endif
747
748 const bfd_target
749 #ifdef TARGET_SYM
750 TARGET_SYM =
751 #else
752 x86_64_coff_vec =
753 #endif
754 {
755 #ifdef TARGET_NAME
756 TARGET_NAME,
757 #else
758 "coff-x86-64", /* Name. */
759 #endif
760 bfd_target_coff_flavour,
761 BFD_ENDIAN_LITTLE, /* Data byte order is little. */
762 BFD_ENDIAN_LITTLE, /* Header byte order is little. */
763
764 (HAS_RELOC | EXEC_P | /* Object flags. */
765 HAS_LINENO | HAS_DEBUG |
766 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED | BFD_COMPRESS | BFD_DECOMPRESS),
767
768 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* Section flags. */
769 #if defined(COFF_WITH_PE)
770 | SEC_LINK_ONCE | SEC_LINK_DUPLICATES | SEC_READONLY | SEC_DEBUGGING
771 #endif
772 | SEC_CODE | SEC_DATA | SEC_EXCLUDE ),
773
774 #ifdef TARGET_UNDERSCORE
775 TARGET_UNDERSCORE, /* Leading underscore. */
776 #else
777 0, /* Leading underscore. */
778 #endif
779 '/', /* Ar_pad_char. */
780 15, /* Ar_max_namelen. */
781 0, /* match priority. */
782
783 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
784 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
785 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Data. */
786 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
787 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
788 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Hdrs. */
789
790 /* Note that we allow an object file to be treated as a core file as well. */
791 { _bfd_dummy_target, amd64coff_object_p, /* BFD_check_format. */
792 bfd_generic_archive_p, amd64coff_object_p },
793 { bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format. */
794 bfd_false },
795 { bfd_false, coff_write_object_contents, /* bfd_write_contents. */
796 _bfd_write_archive_contents, bfd_false },
797
798 BFD_JUMP_TABLE_GENERIC (coff),
799 BFD_JUMP_TABLE_COPY (coff),
800 BFD_JUMP_TABLE_CORE (_bfd_nocore),
801 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
802 BFD_JUMP_TABLE_SYMBOLS (coff),
803 BFD_JUMP_TABLE_RELOCS (coff),
804 BFD_JUMP_TABLE_WRITE (coff),
805 BFD_JUMP_TABLE_LINK (coff),
806 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
807
808 NULL,
809
810 COFF_SWAP_TABLE
811 };
812