* Makefile.am (ALL_MACHINES): Add cpu-tilegx.lo and cpu-tilepro.lo.
[deliverable/binutils-gdb.git] / bfd / cofflink.c
1 /* COFF specific linker code.
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006, 2007, 2008, 2009, 2011 Free Software Foundation, Inc.
4 Written by Ian Lance Taylor, Cygnus Support.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
22
23 /* This file contains the COFF backend linker code. */
24
25 #include "sysdep.h"
26 #include "bfd.h"
27 #include "bfdlink.h"
28 #include "libbfd.h"
29 #include "coff/internal.h"
30 #include "libcoff.h"
31 #include "safe-ctype.h"
32
33 static bfd_boolean coff_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info);
34 static bfd_boolean coff_link_check_archive_element (bfd *abfd, struct bfd_link_info *info, bfd_boolean *pneeded);
35 static bfd_boolean coff_link_add_symbols (bfd *abfd, struct bfd_link_info *info);
36
37 /* Return TRUE if SYM is a weak, external symbol. */
38 #define IS_WEAK_EXTERNAL(abfd, sym) \
39 ((sym).n_sclass == C_WEAKEXT \
40 || (obj_pe (abfd) && (sym).n_sclass == C_NT_WEAK))
41
42 /* Return TRUE if SYM is an external symbol. */
43 #define IS_EXTERNAL(abfd, sym) \
44 ((sym).n_sclass == C_EXT || IS_WEAK_EXTERNAL (abfd, sym))
45
46 /* Define macros so that the ISFCN, et. al., macros work correctly.
47 These macros are defined in include/coff/internal.h in terms of
48 N_TMASK, etc. These definitions require a user to define local
49 variables with the appropriate names, and with values from the
50 coff_data (abfd) structure. */
51
52 #define N_TMASK n_tmask
53 #define N_BTSHFT n_btshft
54 #define N_BTMASK n_btmask
55
56 /* Create an entry in a COFF linker hash table. */
57
58 struct bfd_hash_entry *
59 _bfd_coff_link_hash_newfunc (struct bfd_hash_entry *entry,
60 struct bfd_hash_table *table,
61 const char *string)
62 {
63 struct coff_link_hash_entry *ret = (struct coff_link_hash_entry *) entry;
64
65 /* Allocate the structure if it has not already been allocated by a
66 subclass. */
67 if (ret == (struct coff_link_hash_entry *) NULL)
68 ret = ((struct coff_link_hash_entry *)
69 bfd_hash_allocate (table, sizeof (struct coff_link_hash_entry)));
70 if (ret == (struct coff_link_hash_entry *) NULL)
71 return (struct bfd_hash_entry *) ret;
72
73 /* Call the allocation method of the superclass. */
74 ret = ((struct coff_link_hash_entry *)
75 _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
76 table, string));
77 if (ret != (struct coff_link_hash_entry *) NULL)
78 {
79 /* Set local fields. */
80 ret->indx = -1;
81 ret->type = T_NULL;
82 ret->symbol_class = C_NULL;
83 ret->numaux = 0;
84 ret->auxbfd = NULL;
85 ret->aux = NULL;
86 }
87
88 return (struct bfd_hash_entry *) ret;
89 }
90
91 /* Initialize a COFF linker hash table. */
92
93 bfd_boolean
94 _bfd_coff_link_hash_table_init (struct coff_link_hash_table *table,
95 bfd *abfd,
96 struct bfd_hash_entry *(*newfunc) (struct bfd_hash_entry *,
97 struct bfd_hash_table *,
98 const char *),
99 unsigned int entsize)
100 {
101 memset (&table->stab_info, 0, sizeof (table->stab_info));
102 return _bfd_link_hash_table_init (&table->root, abfd, newfunc, entsize);
103 }
104
105 /* Create a COFF linker hash table. */
106
107 struct bfd_link_hash_table *
108 _bfd_coff_link_hash_table_create (bfd *abfd)
109 {
110 struct coff_link_hash_table *ret;
111 bfd_size_type amt = sizeof (struct coff_link_hash_table);
112
113 ret = (struct coff_link_hash_table *) bfd_malloc (amt);
114 if (ret == NULL)
115 return NULL;
116
117 if (! _bfd_coff_link_hash_table_init (ret, abfd,
118 _bfd_coff_link_hash_newfunc,
119 sizeof (struct coff_link_hash_entry)))
120 {
121 free (ret);
122 return (struct bfd_link_hash_table *) NULL;
123 }
124 return &ret->root;
125 }
126
127 /* Create an entry in a COFF debug merge hash table. */
128
129 struct bfd_hash_entry *
130 _bfd_coff_debug_merge_hash_newfunc (struct bfd_hash_entry *entry,
131 struct bfd_hash_table *table,
132 const char *string)
133 {
134 struct coff_debug_merge_hash_entry *ret =
135 (struct coff_debug_merge_hash_entry *) entry;
136
137 /* Allocate the structure if it has not already been allocated by a
138 subclass. */
139 if (ret == (struct coff_debug_merge_hash_entry *) NULL)
140 ret = ((struct coff_debug_merge_hash_entry *)
141 bfd_hash_allocate (table,
142 sizeof (struct coff_debug_merge_hash_entry)));
143 if (ret == (struct coff_debug_merge_hash_entry *) NULL)
144 return (struct bfd_hash_entry *) ret;
145
146 /* Call the allocation method of the superclass. */
147 ret = ((struct coff_debug_merge_hash_entry *)
148 bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string));
149 if (ret != (struct coff_debug_merge_hash_entry *) NULL)
150 {
151 /* Set local fields. */
152 ret->types = NULL;
153 }
154
155 return (struct bfd_hash_entry *) ret;
156 }
157
158 /* Given a COFF BFD, add symbols to the global hash table as
159 appropriate. */
160
161 bfd_boolean
162 _bfd_coff_link_add_symbols (bfd *abfd, struct bfd_link_info *info)
163 {
164 switch (bfd_get_format (abfd))
165 {
166 case bfd_object:
167 return coff_link_add_object_symbols (abfd, info);
168 case bfd_archive:
169 return _bfd_generic_link_add_archive_symbols
170 (abfd, info, coff_link_check_archive_element);
171 default:
172 bfd_set_error (bfd_error_wrong_format);
173 return FALSE;
174 }
175 }
176
177 /* Add symbols from a COFF object file. */
178
179 static bfd_boolean
180 coff_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info)
181 {
182 if (! _bfd_coff_get_external_symbols (abfd))
183 return FALSE;
184 if (! coff_link_add_symbols (abfd, info))
185 return FALSE;
186
187 if (! info->keep_memory
188 && ! _bfd_coff_free_symbols (abfd))
189 return FALSE;
190
191 return TRUE;
192 }
193
194 /* Look through the symbols to see if this object file should be
195 included in the link. */
196
197 static bfd_boolean
198 coff_link_check_ar_symbols (bfd *abfd,
199 struct bfd_link_info *info,
200 bfd_boolean *pneeded,
201 bfd **subsbfd)
202 {
203 bfd_size_type symesz;
204 bfd_byte *esym;
205 bfd_byte *esym_end;
206
207 *pneeded = FALSE;
208
209 symesz = bfd_coff_symesz (abfd);
210 esym = (bfd_byte *) obj_coff_external_syms (abfd);
211 esym_end = esym + obj_raw_syment_count (abfd) * symesz;
212 while (esym < esym_end)
213 {
214 struct internal_syment sym;
215 enum coff_symbol_classification classification;
216
217 bfd_coff_swap_sym_in (abfd, esym, &sym);
218
219 classification = bfd_coff_classify_symbol (abfd, &sym);
220 if (classification == COFF_SYMBOL_GLOBAL
221 || classification == COFF_SYMBOL_COMMON)
222 {
223 const char *name;
224 char buf[SYMNMLEN + 1];
225 struct bfd_link_hash_entry *h;
226
227 /* This symbol is externally visible, and is defined by this
228 object file. */
229 name = _bfd_coff_internal_syment_name (abfd, &sym, buf);
230 if (name == NULL)
231 return FALSE;
232 h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE);
233
234 /* Auto import. */
235 if (!h
236 && info->pei386_auto_import
237 && CONST_STRNEQ (name, "__imp_"))
238 h = bfd_link_hash_lookup (info->hash, name + 6, FALSE, FALSE, TRUE);
239
240 /* We are only interested in symbols that are currently
241 undefined. If a symbol is currently known to be common,
242 COFF linkers do not bring in an object file which defines
243 it. */
244 if (h != (struct bfd_link_hash_entry *) NULL
245 && h->type == bfd_link_hash_undefined)
246 {
247 if (!(*info->callbacks
248 ->add_archive_element) (info, abfd, name, subsbfd))
249 return FALSE;
250 *pneeded = TRUE;
251 return TRUE;
252 }
253 }
254
255 esym += (sym.n_numaux + 1) * symesz;
256 }
257
258 /* We do not need this object file. */
259 return TRUE;
260 }
261
262 /* Check a single archive element to see if we need to include it in
263 the link. *PNEEDED is set according to whether this element is
264 needed in the link or not. This is called via
265 _bfd_generic_link_add_archive_symbols. */
266
267 static bfd_boolean
268 coff_link_check_archive_element (bfd *abfd,
269 struct bfd_link_info *info,
270 bfd_boolean *pneeded)
271 {
272 bfd *oldbfd;
273 bfd_boolean needed;
274
275 if (!_bfd_coff_get_external_symbols (abfd))
276 return FALSE;
277
278 oldbfd = abfd;
279 if (!coff_link_check_ar_symbols (abfd, info, pneeded, &abfd))
280 return FALSE;
281
282 needed = *pneeded;
283 if (needed)
284 {
285 /* Potentially, the add_archive_element hook may have set a
286 substitute BFD for us. */
287 if (abfd != oldbfd)
288 {
289 if (!info->keep_memory
290 && !_bfd_coff_free_symbols (oldbfd))
291 return FALSE;
292 if (!_bfd_coff_get_external_symbols (abfd))
293 return FALSE;
294 }
295 if (!coff_link_add_symbols (abfd, info))
296 return FALSE;
297 }
298
299 if (!info->keep_memory || !needed)
300 {
301 if (!_bfd_coff_free_symbols (abfd))
302 return FALSE;
303 }
304 return TRUE;
305 }
306
307 /* Add all the symbols from an object file to the hash table. */
308
309 static bfd_boolean
310 coff_link_add_symbols (bfd *abfd,
311 struct bfd_link_info *info)
312 {
313 unsigned int n_tmask = coff_data (abfd)->local_n_tmask;
314 unsigned int n_btshft = coff_data (abfd)->local_n_btshft;
315 unsigned int n_btmask = coff_data (abfd)->local_n_btmask;
316 bfd_boolean keep_syms;
317 bfd_boolean default_copy;
318 bfd_size_type symcount;
319 struct coff_link_hash_entry **sym_hash;
320 bfd_size_type symesz;
321 bfd_byte *esym;
322 bfd_byte *esym_end;
323 bfd_size_type amt;
324
325 symcount = obj_raw_syment_count (abfd);
326
327 if (symcount == 0)
328 return TRUE; /* Nothing to do. */
329
330 /* Keep the symbols during this function, in case the linker needs
331 to read the generic symbols in order to report an error message. */
332 keep_syms = obj_coff_keep_syms (abfd);
333 obj_coff_keep_syms (abfd) = TRUE;
334
335 if (info->keep_memory)
336 default_copy = FALSE;
337 else
338 default_copy = TRUE;
339
340 /* We keep a list of the linker hash table entries that correspond
341 to particular symbols. */
342 amt = symcount * sizeof (struct coff_link_hash_entry *);
343 sym_hash = (struct coff_link_hash_entry **) bfd_zalloc (abfd, amt);
344 if (sym_hash == NULL)
345 goto error_return;
346 obj_coff_sym_hashes (abfd) = sym_hash;
347
348 symesz = bfd_coff_symesz (abfd);
349 BFD_ASSERT (symesz == bfd_coff_auxesz (abfd));
350 esym = (bfd_byte *) obj_coff_external_syms (abfd);
351 esym_end = esym + symcount * symesz;
352 while (esym < esym_end)
353 {
354 struct internal_syment sym;
355 enum coff_symbol_classification classification;
356 bfd_boolean copy;
357
358 bfd_coff_swap_sym_in (abfd, esym, &sym);
359
360 classification = bfd_coff_classify_symbol (abfd, &sym);
361 if (classification != COFF_SYMBOL_LOCAL)
362 {
363 const char *name;
364 char buf[SYMNMLEN + 1];
365 flagword flags;
366 asection *section;
367 bfd_vma value;
368 bfd_boolean addit;
369
370 /* This symbol is externally visible. */
371
372 name = _bfd_coff_internal_syment_name (abfd, &sym, buf);
373 if (name == NULL)
374 goto error_return;
375
376 /* We must copy the name into memory if we got it from the
377 syment itself, rather than the string table. */
378 copy = default_copy;
379 if (sym._n._n_n._n_zeroes != 0
380 || sym._n._n_n._n_offset == 0)
381 copy = TRUE;
382
383 value = sym.n_value;
384
385 switch (classification)
386 {
387 default:
388 abort ();
389
390 case COFF_SYMBOL_GLOBAL:
391 flags = BSF_EXPORT | BSF_GLOBAL;
392 section = coff_section_from_bfd_index (abfd, sym.n_scnum);
393 if (! obj_pe (abfd))
394 value -= section->vma;
395 break;
396
397 case COFF_SYMBOL_UNDEFINED:
398 flags = 0;
399 section = bfd_und_section_ptr;
400 break;
401
402 case COFF_SYMBOL_COMMON:
403 flags = BSF_GLOBAL;
404 section = bfd_com_section_ptr;
405 break;
406
407 case COFF_SYMBOL_PE_SECTION:
408 flags = BSF_SECTION_SYM | BSF_GLOBAL;
409 section = coff_section_from_bfd_index (abfd, sym.n_scnum);
410 break;
411 }
412
413 if (IS_WEAK_EXTERNAL (abfd, sym))
414 flags = BSF_WEAK;
415
416 addit = TRUE;
417
418 /* In the PE format, section symbols actually refer to the
419 start of the output section. We handle them specially
420 here. */
421 if (obj_pe (abfd) && (flags & BSF_SECTION_SYM) != 0)
422 {
423 *sym_hash = coff_link_hash_lookup (coff_hash_table (info),
424 name, FALSE, copy, FALSE);
425 if (*sym_hash != NULL)
426 {
427 if (((*sym_hash)->coff_link_hash_flags
428 & COFF_LINK_HASH_PE_SECTION_SYMBOL) == 0
429 && (*sym_hash)->root.type != bfd_link_hash_undefined
430 && (*sym_hash)->root.type != bfd_link_hash_undefweak)
431 (*_bfd_error_handler)
432 ("Warning: symbol `%s' is both section and non-section",
433 name);
434
435 addit = FALSE;
436 }
437 }
438
439 /* The Microsoft Visual C compiler does string pooling by
440 hashing the constants to an internal symbol name, and
441 relying on the linker comdat support to discard
442 duplicate names. However, if one string is a literal and
443 one is a data initializer, one will end up in the .data
444 section and one will end up in the .rdata section. The
445 Microsoft linker will combine them into the .data
446 section, which seems to be wrong since it might cause the
447 literal to change.
448
449 As long as there are no external references to the
450 symbols, which there shouldn't be, we can treat the .data
451 and .rdata instances as separate symbols. The comdat
452 code in the linker will do the appropriate merging. Here
453 we avoid getting a multiple definition error for one of
454 these special symbols.
455
456 FIXME: I don't think this will work in the case where
457 there are two object files which use the constants as a
458 literal and two object files which use it as a data
459 initializer. One or the other of the second object files
460 is going to wind up with an inappropriate reference. */
461 if (obj_pe (abfd)
462 && (classification == COFF_SYMBOL_GLOBAL
463 || classification == COFF_SYMBOL_PE_SECTION)
464 && coff_section_data (abfd, section) != NULL
465 && coff_section_data (abfd, section)->comdat != NULL
466 && CONST_STRNEQ (name, "??_")
467 && strcmp (name, coff_section_data (abfd, section)->comdat->name) == 0)
468 {
469 if (*sym_hash == NULL)
470 *sym_hash = coff_link_hash_lookup (coff_hash_table (info),
471 name, FALSE, copy, FALSE);
472 if (*sym_hash != NULL
473 && (*sym_hash)->root.type == bfd_link_hash_defined
474 && coff_section_data (abfd, (*sym_hash)->root.u.def.section)->comdat != NULL
475 && strcmp (coff_section_data (abfd, (*sym_hash)->root.u.def.section)->comdat->name,
476 coff_section_data (abfd, section)->comdat->name) == 0)
477 addit = FALSE;
478 }
479
480 if (addit)
481 {
482 if (! (bfd_coff_link_add_one_symbol
483 (info, abfd, name, flags, section, value,
484 (const char *) NULL, copy, FALSE,
485 (struct bfd_link_hash_entry **) sym_hash)))
486 goto error_return;
487 }
488
489 if (obj_pe (abfd) && (flags & BSF_SECTION_SYM) != 0)
490 (*sym_hash)->coff_link_hash_flags |=
491 COFF_LINK_HASH_PE_SECTION_SYMBOL;
492
493 /* Limit the alignment of a common symbol to the possible
494 alignment of a section. There is no point to permitting
495 a higher alignment for a common symbol: we can not
496 guarantee it, and it may cause us to allocate extra space
497 in the common section. */
498 if (section == bfd_com_section_ptr
499 && (*sym_hash)->root.type == bfd_link_hash_common
500 && ((*sym_hash)->root.u.c.p->alignment_power
501 > bfd_coff_default_section_alignment_power (abfd)))
502 (*sym_hash)->root.u.c.p->alignment_power
503 = bfd_coff_default_section_alignment_power (abfd);
504
505 if (bfd_get_flavour (info->output_bfd) == bfd_get_flavour (abfd))
506 {
507 /* If we don't have any symbol information currently in
508 the hash table, or if we are looking at a symbol
509 definition, then update the symbol class and type in
510 the hash table. */
511 if (((*sym_hash)->symbol_class == C_NULL
512 && (*sym_hash)->type == T_NULL)
513 || sym.n_scnum != 0
514 || (sym.n_value != 0
515 && (*sym_hash)->root.type != bfd_link_hash_defined
516 && (*sym_hash)->root.type != bfd_link_hash_defweak))
517 {
518 (*sym_hash)->symbol_class = sym.n_sclass;
519 if (sym.n_type != T_NULL)
520 {
521 /* We want to warn if the type changed, but not
522 if it changed from an unspecified type.
523 Testing the whole type byte may work, but the
524 change from (e.g.) a function of unspecified
525 type to function of known type also wants to
526 skip the warning. */
527 if ((*sym_hash)->type != T_NULL
528 && (*sym_hash)->type != sym.n_type
529 && !(DTYPE ((*sym_hash)->type) == DTYPE (sym.n_type)
530 && (BTYPE ((*sym_hash)->type) == T_NULL
531 || BTYPE (sym.n_type) == T_NULL)))
532 (*_bfd_error_handler)
533 (_("Warning: type of symbol `%s' changed from %d to %d in %B"),
534 abfd, name, (*sym_hash)->type, sym.n_type);
535
536 /* We don't want to change from a meaningful
537 base type to a null one, but if we know
538 nothing, take what little we might now know. */
539 if (BTYPE (sym.n_type) != T_NULL
540 || (*sym_hash)->type == T_NULL)
541 (*sym_hash)->type = sym.n_type;
542 }
543 (*sym_hash)->auxbfd = abfd;
544 if (sym.n_numaux != 0)
545 {
546 union internal_auxent *alloc;
547 unsigned int i;
548 bfd_byte *eaux;
549 union internal_auxent *iaux;
550
551 (*sym_hash)->numaux = sym.n_numaux;
552 alloc = ((union internal_auxent *)
553 bfd_hash_allocate (&info->hash->table,
554 (sym.n_numaux
555 * sizeof (*alloc))));
556 if (alloc == NULL)
557 goto error_return;
558 for (i = 0, eaux = esym + symesz, iaux = alloc;
559 i < sym.n_numaux;
560 i++, eaux += symesz, iaux++)
561 bfd_coff_swap_aux_in (abfd, eaux, sym.n_type,
562 sym.n_sclass, (int) i,
563 sym.n_numaux, iaux);
564 (*sym_hash)->aux = alloc;
565 }
566 }
567 }
568
569 if (classification == COFF_SYMBOL_PE_SECTION
570 && (*sym_hash)->numaux != 0)
571 {
572 /* Some PE sections (such as .bss) have a zero size in
573 the section header, but a non-zero size in the AUX
574 record. Correct that here.
575
576 FIXME: This is not at all the right place to do this.
577 For example, it won't help objdump. This needs to be
578 done when we swap in the section header. */
579 BFD_ASSERT ((*sym_hash)->numaux == 1);
580 if (section->size == 0)
581 section->size = (*sym_hash)->aux[0].x_scn.x_scnlen;
582
583 /* FIXME: We could test whether the section sizes
584 matches the size in the aux entry, but apparently
585 that sometimes fails unexpectedly. */
586 }
587 }
588
589 esym += (sym.n_numaux + 1) * symesz;
590 sym_hash += sym.n_numaux + 1;
591 }
592
593 /* If this is a non-traditional, non-relocatable link, try to
594 optimize the handling of any .stab/.stabstr sections. */
595 if (! info->relocatable
596 && ! info->traditional_format
597 && bfd_get_flavour (info->output_bfd) == bfd_get_flavour (abfd)
598 && (info->strip != strip_all && info->strip != strip_debugger))
599 {
600 asection *stabstr;
601
602 stabstr = bfd_get_section_by_name (abfd, ".stabstr");
603
604 if (stabstr != NULL)
605 {
606 bfd_size_type string_offset = 0;
607 asection *stab;
608
609 for (stab = abfd->sections; stab; stab = stab->next)
610 if (CONST_STRNEQ (stab->name, ".stab")
611 && (!stab->name[5]
612 || (stab->name[5] == '.' && ISDIGIT (stab->name[6]))))
613 {
614 struct coff_link_hash_table *table;
615 struct coff_section_tdata *secdata
616 = coff_section_data (abfd, stab);
617
618 if (secdata == NULL)
619 {
620 amt = sizeof (struct coff_section_tdata);
621 stab->used_by_bfd = bfd_zalloc (abfd, amt);
622 if (stab->used_by_bfd == NULL)
623 goto error_return;
624 secdata = coff_section_data (abfd, stab);
625 }
626
627 table = coff_hash_table (info);
628
629 if (! _bfd_link_section_stabs (abfd, &table->stab_info,
630 stab, stabstr,
631 &secdata->stab_info,
632 &string_offset))
633 goto error_return;
634 }
635 }
636 }
637
638 obj_coff_keep_syms (abfd) = keep_syms;
639
640 return TRUE;
641
642 error_return:
643 obj_coff_keep_syms (abfd) = keep_syms;
644 return FALSE;
645 }
646 \f
647 /* Do the final link step. */
648
649 bfd_boolean
650 _bfd_coff_final_link (bfd *abfd,
651 struct bfd_link_info *info)
652 {
653 bfd_size_type symesz;
654 struct coff_final_link_info finfo;
655 bfd_boolean debug_merge_allocated;
656 bfd_boolean long_section_names;
657 asection *o;
658 struct bfd_link_order *p;
659 bfd_size_type max_sym_count;
660 bfd_size_type max_lineno_count;
661 bfd_size_type max_reloc_count;
662 bfd_size_type max_output_reloc_count;
663 bfd_size_type max_contents_size;
664 file_ptr rel_filepos;
665 unsigned int relsz;
666 file_ptr line_filepos;
667 unsigned int linesz;
668 bfd *sub;
669 bfd_byte *external_relocs = NULL;
670 char strbuf[STRING_SIZE_SIZE];
671 bfd_size_type amt;
672
673 symesz = bfd_coff_symesz (abfd);
674
675 finfo.info = info;
676 finfo.output_bfd = abfd;
677 finfo.strtab = NULL;
678 finfo.section_info = NULL;
679 finfo.last_file_index = -1;
680 finfo.last_bf_index = -1;
681 finfo.internal_syms = NULL;
682 finfo.sec_ptrs = NULL;
683 finfo.sym_indices = NULL;
684 finfo.outsyms = NULL;
685 finfo.linenos = NULL;
686 finfo.contents = NULL;
687 finfo.external_relocs = NULL;
688 finfo.internal_relocs = NULL;
689 finfo.global_to_static = FALSE;
690 debug_merge_allocated = FALSE;
691
692 coff_data (abfd)->link_info = info;
693
694 finfo.strtab = _bfd_stringtab_init ();
695 if (finfo.strtab == NULL)
696 goto error_return;
697
698 if (! coff_debug_merge_hash_table_init (&finfo.debug_merge))
699 goto error_return;
700 debug_merge_allocated = TRUE;
701
702 /* Compute the file positions for all the sections. */
703 if (! abfd->output_has_begun)
704 {
705 if (! bfd_coff_compute_section_file_positions (abfd))
706 goto error_return;
707 }
708
709 /* Count the line numbers and relocation entries required for the
710 output file. Set the file positions for the relocs. */
711 rel_filepos = obj_relocbase (abfd);
712 relsz = bfd_coff_relsz (abfd);
713 max_contents_size = 0;
714 max_lineno_count = 0;
715 max_reloc_count = 0;
716
717 long_section_names = FALSE;
718 for (o = abfd->sections; o != NULL; o = o->next)
719 {
720 o->reloc_count = 0;
721 o->lineno_count = 0;
722 for (p = o->map_head.link_order; p != NULL; p = p->next)
723 {
724 if (p->type == bfd_indirect_link_order)
725 {
726 asection *sec;
727
728 sec = p->u.indirect.section;
729
730 /* Mark all sections which are to be included in the
731 link. This will normally be every section. We need
732 to do this so that we can identify any sections which
733 the linker has decided to not include. */
734 sec->linker_mark = TRUE;
735
736 if (info->strip == strip_none
737 || info->strip == strip_some)
738 o->lineno_count += sec->lineno_count;
739
740 if (info->relocatable)
741 o->reloc_count += sec->reloc_count;
742
743 if (sec->rawsize > max_contents_size)
744 max_contents_size = sec->rawsize;
745 if (sec->size > max_contents_size)
746 max_contents_size = sec->size;
747 if (sec->lineno_count > max_lineno_count)
748 max_lineno_count = sec->lineno_count;
749 if (sec->reloc_count > max_reloc_count)
750 max_reloc_count = sec->reloc_count;
751 }
752 else if (info->relocatable
753 && (p->type == bfd_section_reloc_link_order
754 || p->type == bfd_symbol_reloc_link_order))
755 ++o->reloc_count;
756 }
757 if (o->reloc_count == 0)
758 o->rel_filepos = 0;
759 else
760 {
761 o->flags |= SEC_RELOC;
762 o->rel_filepos = rel_filepos;
763 rel_filepos += o->reloc_count * relsz;
764 /* In PE COFF, if there are at least 0xffff relocations an
765 extra relocation will be written out to encode the count. */
766 if (obj_pe (abfd) && o->reloc_count >= 0xffff)
767 rel_filepos += relsz;
768 }
769
770 if (bfd_coff_long_section_names (abfd)
771 && strlen (o->name) > SCNNMLEN)
772 {
773 /* This section has a long name which must go in the string
774 table. This must correspond to the code in
775 coff_write_object_contents which puts the string index
776 into the s_name field of the section header. That is why
777 we pass hash as FALSE. */
778 if (_bfd_stringtab_add (finfo.strtab, o->name, FALSE, FALSE)
779 == (bfd_size_type) -1)
780 goto error_return;
781 long_section_names = TRUE;
782 }
783 }
784
785 /* If doing a relocatable link, allocate space for the pointers we
786 need to keep. */
787 if (info->relocatable)
788 {
789 unsigned int i;
790
791 /* We use section_count + 1, rather than section_count, because
792 the target_index fields are 1 based. */
793 amt = abfd->section_count + 1;
794 amt *= sizeof (struct coff_link_section_info);
795 finfo.section_info = (struct coff_link_section_info *) bfd_malloc (amt);
796 if (finfo.section_info == NULL)
797 goto error_return;
798 for (i = 0; i <= abfd->section_count; i++)
799 {
800 finfo.section_info[i].relocs = NULL;
801 finfo.section_info[i].rel_hashes = NULL;
802 }
803 }
804
805 /* We now know the size of the relocs, so we can determine the file
806 positions of the line numbers. */
807 line_filepos = rel_filepos;
808 linesz = bfd_coff_linesz (abfd);
809 max_output_reloc_count = 0;
810 for (o = abfd->sections; o != NULL; o = o->next)
811 {
812 if (o->lineno_count == 0)
813 o->line_filepos = 0;
814 else
815 {
816 o->line_filepos = line_filepos;
817 line_filepos += o->lineno_count * linesz;
818 }
819
820 if (o->reloc_count != 0)
821 {
822 /* We don't know the indices of global symbols until we have
823 written out all the local symbols. For each section in
824 the output file, we keep an array of pointers to hash
825 table entries. Each entry in the array corresponds to a
826 reloc. When we find a reloc against a global symbol, we
827 set the corresponding entry in this array so that we can
828 fix up the symbol index after we have written out all the
829 local symbols.
830
831 Because of this problem, we also keep the relocs in
832 memory until the end of the link. This wastes memory,
833 but only when doing a relocatable link, which is not the
834 common case. */
835 BFD_ASSERT (info->relocatable);
836 amt = o->reloc_count;
837 amt *= sizeof (struct internal_reloc);
838 finfo.section_info[o->target_index].relocs =
839 (struct internal_reloc *) bfd_malloc (amt);
840 amt = o->reloc_count;
841 amt *= sizeof (struct coff_link_hash_entry *);
842 finfo.section_info[o->target_index].rel_hashes =
843 (struct coff_link_hash_entry **) bfd_malloc (amt);
844 if (finfo.section_info[o->target_index].relocs == NULL
845 || finfo.section_info[o->target_index].rel_hashes == NULL)
846 goto error_return;
847
848 if (o->reloc_count > max_output_reloc_count)
849 max_output_reloc_count = o->reloc_count;
850 }
851
852 /* Reset the reloc and lineno counts, so that we can use them to
853 count the number of entries we have output so far. */
854 o->reloc_count = 0;
855 o->lineno_count = 0;
856 }
857
858 obj_sym_filepos (abfd) = line_filepos;
859
860 /* Figure out the largest number of symbols in an input BFD. Take
861 the opportunity to clear the output_has_begun fields of all the
862 input BFD's. */
863 max_sym_count = 0;
864 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
865 {
866 size_t sz;
867
868 sub->output_has_begun = FALSE;
869 sz = obj_raw_syment_count (sub);
870 if (sz > max_sym_count)
871 max_sym_count = sz;
872 }
873
874 /* Allocate some buffers used while linking. */
875 amt = max_sym_count * sizeof (struct internal_syment);
876 finfo.internal_syms = (struct internal_syment *) bfd_malloc (amt);
877 amt = max_sym_count * sizeof (asection *);
878 finfo.sec_ptrs = (asection **) bfd_malloc (amt);
879 amt = max_sym_count * sizeof (long);
880 finfo.sym_indices = (long int *) bfd_malloc (amt);
881 finfo.outsyms = (bfd_byte *) bfd_malloc ((max_sym_count + 1) * symesz);
882 amt = max_lineno_count * bfd_coff_linesz (abfd);
883 finfo.linenos = (bfd_byte *) bfd_malloc (amt);
884 finfo.contents = (bfd_byte *) bfd_malloc (max_contents_size);
885 amt = max_reloc_count * relsz;
886 finfo.external_relocs = (bfd_byte *) bfd_malloc (amt);
887 if (! info->relocatable)
888 {
889 amt = max_reloc_count * sizeof (struct internal_reloc);
890 finfo.internal_relocs = (struct internal_reloc *) bfd_malloc (amt);
891 }
892 if ((finfo.internal_syms == NULL && max_sym_count > 0)
893 || (finfo.sec_ptrs == NULL && max_sym_count > 0)
894 || (finfo.sym_indices == NULL && max_sym_count > 0)
895 || finfo.outsyms == NULL
896 || (finfo.linenos == NULL && max_lineno_count > 0)
897 || (finfo.contents == NULL && max_contents_size > 0)
898 || (finfo.external_relocs == NULL && max_reloc_count > 0)
899 || (! info->relocatable
900 && finfo.internal_relocs == NULL
901 && max_reloc_count > 0))
902 goto error_return;
903
904 /* We now know the position of everything in the file, except that
905 we don't know the size of the symbol table and therefore we don't
906 know where the string table starts. We just build the string
907 table in memory as we go along. We process all the relocations
908 for a single input file at once. */
909 obj_raw_syment_count (abfd) = 0;
910
911 if (coff_backend_info (abfd)->_bfd_coff_start_final_link)
912 {
913 if (! bfd_coff_start_final_link (abfd, info))
914 goto error_return;
915 }
916
917 for (o = abfd->sections; o != NULL; o = o->next)
918 {
919 for (p = o->map_head.link_order; p != NULL; p = p->next)
920 {
921 if (p->type == bfd_indirect_link_order
922 && bfd_family_coff (p->u.indirect.section->owner))
923 {
924 sub = p->u.indirect.section->owner;
925 if (! bfd_coff_link_output_has_begun (sub, & finfo))
926 {
927 if (! _bfd_coff_link_input_bfd (&finfo, sub))
928 goto error_return;
929 sub->output_has_begun = TRUE;
930 }
931 }
932 else if (p->type == bfd_section_reloc_link_order
933 || p->type == bfd_symbol_reloc_link_order)
934 {
935 if (! _bfd_coff_reloc_link_order (abfd, &finfo, o, p))
936 goto error_return;
937 }
938 else
939 {
940 if (! _bfd_default_link_order (abfd, info, o, p))
941 goto error_return;
942 }
943 }
944 }
945
946 if (! bfd_coff_final_link_postscript (abfd, & finfo))
947 goto error_return;
948
949 /* Free up the buffers used by _bfd_coff_link_input_bfd. */
950
951 coff_debug_merge_hash_table_free (&finfo.debug_merge);
952 debug_merge_allocated = FALSE;
953
954 if (finfo.internal_syms != NULL)
955 {
956 free (finfo.internal_syms);
957 finfo.internal_syms = NULL;
958 }
959 if (finfo.sec_ptrs != NULL)
960 {
961 free (finfo.sec_ptrs);
962 finfo.sec_ptrs = NULL;
963 }
964 if (finfo.sym_indices != NULL)
965 {
966 free (finfo.sym_indices);
967 finfo.sym_indices = NULL;
968 }
969 if (finfo.linenos != NULL)
970 {
971 free (finfo.linenos);
972 finfo.linenos = NULL;
973 }
974 if (finfo.contents != NULL)
975 {
976 free (finfo.contents);
977 finfo.contents = NULL;
978 }
979 if (finfo.external_relocs != NULL)
980 {
981 free (finfo.external_relocs);
982 finfo.external_relocs = NULL;
983 }
984 if (finfo.internal_relocs != NULL)
985 {
986 free (finfo.internal_relocs);
987 finfo.internal_relocs = NULL;
988 }
989
990 /* The value of the last C_FILE symbol is supposed to be the symbol
991 index of the first external symbol. Write it out again if
992 necessary. */
993 if (finfo.last_file_index != -1
994 && (unsigned int) finfo.last_file.n_value != obj_raw_syment_count (abfd))
995 {
996 file_ptr pos;
997
998 finfo.last_file.n_value = obj_raw_syment_count (abfd);
999 bfd_coff_swap_sym_out (abfd, &finfo.last_file,
1000 finfo.outsyms);
1001
1002 pos = obj_sym_filepos (abfd) + finfo.last_file_index * symesz;
1003 if (bfd_seek (abfd, pos, SEEK_SET) != 0
1004 || bfd_bwrite (finfo.outsyms, symesz, abfd) != symesz)
1005 return FALSE;
1006 }
1007
1008 /* If doing task linking (ld --task-link) then make a pass through the
1009 global symbols, writing out any that are defined, and making them
1010 static. */
1011 if (info->task_link)
1012 {
1013 finfo.failed = FALSE;
1014 coff_link_hash_traverse (coff_hash_table (info),
1015 _bfd_coff_write_task_globals, &finfo);
1016 if (finfo.failed)
1017 goto error_return;
1018 }
1019
1020 /* Write out the global symbols. */
1021 finfo.failed = FALSE;
1022 bfd_hash_traverse (&info->hash->table, _bfd_coff_write_global_sym, &finfo);
1023 if (finfo.failed)
1024 goto error_return;
1025
1026 /* The outsyms buffer is used by _bfd_coff_write_global_sym. */
1027 if (finfo.outsyms != NULL)
1028 {
1029 free (finfo.outsyms);
1030 finfo.outsyms = NULL;
1031 }
1032
1033 if (info->relocatable && max_output_reloc_count > 0)
1034 {
1035 /* Now that we have written out all the global symbols, we know
1036 the symbol indices to use for relocs against them, and we can
1037 finally write out the relocs. */
1038 amt = max_output_reloc_count * relsz;
1039 external_relocs = (bfd_byte *) bfd_malloc (amt);
1040 if (external_relocs == NULL)
1041 goto error_return;
1042
1043 for (o = abfd->sections; o != NULL; o = o->next)
1044 {
1045 struct internal_reloc *irel;
1046 struct internal_reloc *irelend;
1047 struct coff_link_hash_entry **rel_hash;
1048 bfd_byte *erel;
1049
1050 if (o->reloc_count == 0)
1051 continue;
1052
1053 irel = finfo.section_info[o->target_index].relocs;
1054 irelend = irel + o->reloc_count;
1055 rel_hash = finfo.section_info[o->target_index].rel_hashes;
1056 erel = external_relocs;
1057 for (; irel < irelend; irel++, rel_hash++, erel += relsz)
1058 {
1059 if (*rel_hash != NULL)
1060 {
1061 BFD_ASSERT ((*rel_hash)->indx >= 0);
1062 irel->r_symndx = (*rel_hash)->indx;
1063 }
1064 bfd_coff_swap_reloc_out (abfd, irel, erel);
1065 }
1066
1067 if (bfd_seek (abfd, o->rel_filepos, SEEK_SET) != 0)
1068 goto error_return;
1069 if (obj_pe (abfd) && o->reloc_count >= 0xffff)
1070 {
1071 /* In PE COFF, write the count of relocs as the first
1072 reloc. The header overflow bit will be set
1073 elsewhere. */
1074 struct internal_reloc incount;
1075 bfd_byte *excount = (bfd_byte *)bfd_malloc (relsz);
1076
1077 memset (&incount, 0, sizeof (incount));
1078 incount.r_vaddr = o->reloc_count + 1;
1079 bfd_coff_swap_reloc_out (abfd, (PTR) &incount, (PTR) excount);
1080 if (bfd_bwrite (excount, relsz, abfd) != relsz)
1081 /* We'll leak, but it's an error anyway. */
1082 goto error_return;
1083 free (excount);
1084 }
1085 if (bfd_bwrite (external_relocs,
1086 (bfd_size_type) relsz * o->reloc_count, abfd)
1087 != (bfd_size_type) relsz * o->reloc_count)
1088 goto error_return;
1089 }
1090
1091 free (external_relocs);
1092 external_relocs = NULL;
1093 }
1094
1095 /* Free up the section information. */
1096 if (finfo.section_info != NULL)
1097 {
1098 unsigned int i;
1099
1100 for (i = 0; i < abfd->section_count; i++)
1101 {
1102 if (finfo.section_info[i].relocs != NULL)
1103 free (finfo.section_info[i].relocs);
1104 if (finfo.section_info[i].rel_hashes != NULL)
1105 free (finfo.section_info[i].rel_hashes);
1106 }
1107 free (finfo.section_info);
1108 finfo.section_info = NULL;
1109 }
1110
1111 /* If we have optimized stabs strings, output them. */
1112 if (coff_hash_table (info)->stab_info.stabstr != NULL)
1113 {
1114 if (! _bfd_write_stab_strings (abfd, &coff_hash_table (info)->stab_info))
1115 return FALSE;
1116 }
1117
1118 /* Write out the string table. */
1119 if (obj_raw_syment_count (abfd) != 0 || long_section_names)
1120 {
1121 file_ptr pos;
1122
1123 pos = obj_sym_filepos (abfd) + obj_raw_syment_count (abfd) * symesz;
1124 if (bfd_seek (abfd, pos, SEEK_SET) != 0)
1125 return FALSE;
1126
1127 #if STRING_SIZE_SIZE == 4
1128 H_PUT_32 (abfd,
1129 _bfd_stringtab_size (finfo.strtab) + STRING_SIZE_SIZE,
1130 strbuf);
1131 #else
1132 #error Change H_PUT_32 above
1133 #endif
1134
1135 if (bfd_bwrite (strbuf, (bfd_size_type) STRING_SIZE_SIZE, abfd)
1136 != STRING_SIZE_SIZE)
1137 return FALSE;
1138
1139 if (! _bfd_stringtab_emit (abfd, finfo.strtab))
1140 return FALSE;
1141
1142 obj_coff_strings_written (abfd) = TRUE;
1143 }
1144
1145 _bfd_stringtab_free (finfo.strtab);
1146
1147 /* Setting bfd_get_symcount to 0 will cause write_object_contents to
1148 not try to write out the symbols. */
1149 bfd_get_symcount (abfd) = 0;
1150
1151 return TRUE;
1152
1153 error_return:
1154 if (debug_merge_allocated)
1155 coff_debug_merge_hash_table_free (&finfo.debug_merge);
1156 if (finfo.strtab != NULL)
1157 _bfd_stringtab_free (finfo.strtab);
1158 if (finfo.section_info != NULL)
1159 {
1160 unsigned int i;
1161
1162 for (i = 0; i < abfd->section_count; i++)
1163 {
1164 if (finfo.section_info[i].relocs != NULL)
1165 free (finfo.section_info[i].relocs);
1166 if (finfo.section_info[i].rel_hashes != NULL)
1167 free (finfo.section_info[i].rel_hashes);
1168 }
1169 free (finfo.section_info);
1170 }
1171 if (finfo.internal_syms != NULL)
1172 free (finfo.internal_syms);
1173 if (finfo.sec_ptrs != NULL)
1174 free (finfo.sec_ptrs);
1175 if (finfo.sym_indices != NULL)
1176 free (finfo.sym_indices);
1177 if (finfo.outsyms != NULL)
1178 free (finfo.outsyms);
1179 if (finfo.linenos != NULL)
1180 free (finfo.linenos);
1181 if (finfo.contents != NULL)
1182 free (finfo.contents);
1183 if (finfo.external_relocs != NULL)
1184 free (finfo.external_relocs);
1185 if (finfo.internal_relocs != NULL)
1186 free (finfo.internal_relocs);
1187 if (external_relocs != NULL)
1188 free (external_relocs);
1189 return FALSE;
1190 }
1191
1192 /* Parse out a -heap <reserved>,<commit> line. */
1193
1194 static char *
1195 dores_com (char *ptr, bfd *output_bfd, int heap)
1196 {
1197 if (coff_data(output_bfd)->pe)
1198 {
1199 int val = strtoul (ptr, &ptr, 0);
1200
1201 if (heap)
1202 pe_data(output_bfd)->pe_opthdr.SizeOfHeapReserve = val;
1203 else
1204 pe_data(output_bfd)->pe_opthdr.SizeOfStackReserve = val;
1205
1206 if (ptr[0] == ',')
1207 {
1208 val = strtoul (ptr+1, &ptr, 0);
1209 if (heap)
1210 pe_data(output_bfd)->pe_opthdr.SizeOfHeapCommit = val;
1211 else
1212 pe_data(output_bfd)->pe_opthdr.SizeOfStackCommit = val;
1213 }
1214 }
1215 return ptr;
1216 }
1217
1218 static char *
1219 get_name (char *ptr, char **dst)
1220 {
1221 while (*ptr == ' ')
1222 ptr++;
1223 *dst = ptr;
1224 while (*ptr && *ptr != ' ')
1225 ptr++;
1226 *ptr = 0;
1227 return ptr+1;
1228 }
1229
1230 /* Process any magic embedded commands in a section called .drectve. */
1231
1232 static int
1233 process_embedded_commands (bfd *output_bfd,
1234 struct bfd_link_info *info ATTRIBUTE_UNUSED,
1235 bfd *abfd)
1236 {
1237 asection *sec = bfd_get_section_by_name (abfd, ".drectve");
1238 char *s;
1239 char *e;
1240 bfd_byte *copy;
1241
1242 if (!sec)
1243 return 1;
1244
1245 if (!bfd_malloc_and_get_section (abfd, sec, &copy))
1246 {
1247 if (copy != NULL)
1248 free (copy);
1249 return 0;
1250 }
1251 e = (char *) copy + sec->size;
1252
1253 for (s = (char *) copy; s < e ; )
1254 {
1255 if (s[0] != '-')
1256 {
1257 s++;
1258 continue;
1259 }
1260 if (CONST_STRNEQ (s, "-attr"))
1261 {
1262 char *name;
1263 char *attribs;
1264 asection *asec;
1265 int loop = 1;
1266 int had_write = 0;
1267 int had_exec= 0;
1268
1269 s += 5;
1270 s = get_name (s, &name);
1271 s = get_name (s, &attribs);
1272
1273 while (loop)
1274 {
1275 switch (*attribs++)
1276 {
1277 case 'W':
1278 had_write = 1;
1279 break;
1280 case 'R':
1281 break;
1282 case 'S':
1283 break;
1284 case 'X':
1285 had_exec = 1;
1286 break;
1287 default:
1288 loop = 0;
1289 }
1290 }
1291 asec = bfd_get_section_by_name (abfd, name);
1292 if (asec)
1293 {
1294 if (had_exec)
1295 asec->flags |= SEC_CODE;
1296 if (!had_write)
1297 asec->flags |= SEC_READONLY;
1298 }
1299 }
1300 else if (CONST_STRNEQ (s, "-heap"))
1301 s = dores_com (s + 5, output_bfd, 1);
1302
1303 else if (CONST_STRNEQ (s, "-stack"))
1304 s = dores_com (s + 6, output_bfd, 0);
1305
1306 /* GNU extension for aligned commons. */
1307 else if (CONST_STRNEQ (s, "-aligncomm:"))
1308 {
1309 /* Common symbols must be aligned on reading, as it
1310 is too late to do anything here, after they have
1311 already been allocated, so just skip the directive. */
1312 s += 11;
1313 }
1314
1315 else
1316 s++;
1317 }
1318 free (copy);
1319 return 1;
1320 }
1321
1322 /* Place a marker against all symbols which are used by relocations.
1323 This marker can be picked up by the 'do we skip this symbol ?'
1324 loop in _bfd_coff_link_input_bfd() and used to prevent skipping
1325 that symbol. */
1326
1327 static void
1328 mark_relocs (struct coff_final_link_info *finfo, bfd *input_bfd)
1329 {
1330 asection * a;
1331
1332 if ((bfd_get_file_flags (input_bfd) & HAS_SYMS) == 0)
1333 return;
1334
1335 for (a = input_bfd->sections; a != (asection *) NULL; a = a->next)
1336 {
1337 struct internal_reloc * internal_relocs;
1338 struct internal_reloc * irel;
1339 struct internal_reloc * irelend;
1340
1341 if ((a->flags & SEC_RELOC) == 0 || a->reloc_count < 1)
1342 continue;
1343 /* Don't mark relocs in excluded sections. */
1344 if (a->output_section == bfd_abs_section_ptr)
1345 continue;
1346
1347 /* Read in the relocs. */
1348 internal_relocs = _bfd_coff_read_internal_relocs
1349 (input_bfd, a, FALSE,
1350 finfo->external_relocs,
1351 finfo->info->relocatable,
1352 (finfo->info->relocatable
1353 ? (finfo->section_info[ a->output_section->target_index ].relocs + a->output_section->reloc_count)
1354 : finfo->internal_relocs)
1355 );
1356
1357 if (internal_relocs == NULL)
1358 continue;
1359
1360 irel = internal_relocs;
1361 irelend = irel + a->reloc_count;
1362
1363 /* Place a mark in the sym_indices array (whose entries have
1364 been initialised to 0) for all of the symbols that are used
1365 in the relocation table. This will then be picked up in the
1366 skip/don't-skip pass. */
1367 for (; irel < irelend; irel++)
1368 finfo->sym_indices[ irel->r_symndx ] = -1;
1369 }
1370 }
1371
1372 /* Link an input file into the linker output file. This function
1373 handles all the sections and relocations of the input file at once. */
1374
1375 bfd_boolean
1376 _bfd_coff_link_input_bfd (struct coff_final_link_info *finfo, bfd *input_bfd)
1377 {
1378 unsigned int n_tmask = coff_data (input_bfd)->local_n_tmask;
1379 unsigned int n_btshft = coff_data (input_bfd)->local_n_btshft;
1380 bfd_boolean (*adjust_symndx)
1381 (bfd *, struct bfd_link_info *, bfd *, asection *,
1382 struct internal_reloc *, bfd_boolean *);
1383 bfd *output_bfd;
1384 const char *strings;
1385 bfd_size_type syment_base;
1386 bfd_boolean copy, hash;
1387 bfd_size_type isymesz;
1388 bfd_size_type osymesz;
1389 bfd_size_type linesz;
1390 bfd_byte *esym;
1391 bfd_byte *esym_end;
1392 struct internal_syment *isymp;
1393 asection **secpp;
1394 long *indexp;
1395 unsigned long output_index;
1396 bfd_byte *outsym;
1397 struct coff_link_hash_entry **sym_hash;
1398 asection *o;
1399
1400 /* Move all the symbols to the output file. */
1401
1402 output_bfd = finfo->output_bfd;
1403 strings = NULL;
1404 syment_base = obj_raw_syment_count (output_bfd);
1405 isymesz = bfd_coff_symesz (input_bfd);
1406 osymesz = bfd_coff_symesz (output_bfd);
1407 linesz = bfd_coff_linesz (input_bfd);
1408 BFD_ASSERT (linesz == bfd_coff_linesz (output_bfd));
1409
1410 copy = FALSE;
1411 if (! finfo->info->keep_memory)
1412 copy = TRUE;
1413 hash = TRUE;
1414 if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
1415 hash = FALSE;
1416
1417 if (! _bfd_coff_get_external_symbols (input_bfd))
1418 return FALSE;
1419
1420 esym = (bfd_byte *) obj_coff_external_syms (input_bfd);
1421 esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz;
1422 isymp = finfo->internal_syms;
1423 secpp = finfo->sec_ptrs;
1424 indexp = finfo->sym_indices;
1425 output_index = syment_base;
1426 outsym = finfo->outsyms;
1427
1428 if (coff_data (output_bfd)->pe
1429 && ! process_embedded_commands (output_bfd, finfo->info, input_bfd))
1430 return FALSE;
1431
1432 /* If we are going to perform relocations and also strip/discard some
1433 symbols then we must make sure that we do not strip/discard those
1434 symbols that are going to be involved in the relocations. */
1435 if (( finfo->info->strip != strip_none
1436 || finfo->info->discard != discard_none)
1437 && finfo->info->relocatable)
1438 {
1439 /* Mark the symbol array as 'not-used'. */
1440 memset (indexp, 0, obj_raw_syment_count (input_bfd) * sizeof * indexp);
1441
1442 mark_relocs (finfo, input_bfd);
1443 }
1444
1445 while (esym < esym_end)
1446 {
1447 struct internal_syment isym;
1448 enum coff_symbol_classification classification;
1449 bfd_boolean skip;
1450 bfd_boolean global;
1451 bfd_boolean dont_skip_symbol;
1452 int add;
1453
1454 bfd_coff_swap_sym_in (input_bfd, esym, isymp);
1455
1456 /* Make a copy of *isymp so that the relocate_section function
1457 always sees the original values. This is more reliable than
1458 always recomputing the symbol value even if we are stripping
1459 the symbol. */
1460 isym = *isymp;
1461
1462 classification = bfd_coff_classify_symbol (input_bfd, &isym);
1463 switch (classification)
1464 {
1465 default:
1466 abort ();
1467 case COFF_SYMBOL_GLOBAL:
1468 case COFF_SYMBOL_PE_SECTION:
1469 case COFF_SYMBOL_LOCAL:
1470 *secpp = coff_section_from_bfd_index (input_bfd, isym.n_scnum);
1471 break;
1472 case COFF_SYMBOL_COMMON:
1473 *secpp = bfd_com_section_ptr;
1474 break;
1475 case COFF_SYMBOL_UNDEFINED:
1476 *secpp = bfd_und_section_ptr;
1477 break;
1478 }
1479
1480 /* Extract the flag indicating if this symbol is used by a
1481 relocation. */
1482 if ((finfo->info->strip != strip_none
1483 || finfo->info->discard != discard_none)
1484 && finfo->info->relocatable)
1485 dont_skip_symbol = *indexp;
1486 else
1487 dont_skip_symbol = FALSE;
1488
1489 *indexp = -1;
1490
1491 skip = FALSE;
1492 global = FALSE;
1493 add = 1 + isym.n_numaux;
1494
1495 /* If we are stripping all symbols, we want to skip this one. */
1496 if (finfo->info->strip == strip_all && ! dont_skip_symbol)
1497 skip = TRUE;
1498
1499 if (! skip)
1500 {
1501 switch (classification)
1502 {
1503 default:
1504 abort ();
1505 case COFF_SYMBOL_GLOBAL:
1506 case COFF_SYMBOL_COMMON:
1507 case COFF_SYMBOL_PE_SECTION:
1508 /* This is a global symbol. Global symbols come at the
1509 end of the symbol table, so skip them for now.
1510 Locally defined function symbols, however, are an
1511 exception, and are not moved to the end. */
1512 global = TRUE;
1513 if (! ISFCN (isym.n_type))
1514 skip = TRUE;
1515 break;
1516
1517 case COFF_SYMBOL_UNDEFINED:
1518 /* Undefined symbols are left for the end. */
1519 global = TRUE;
1520 skip = TRUE;
1521 break;
1522
1523 case COFF_SYMBOL_LOCAL:
1524 /* This is a local symbol. Skip it if we are discarding
1525 local symbols. */
1526 if (finfo->info->discard == discard_all && ! dont_skip_symbol)
1527 skip = TRUE;
1528 break;
1529 }
1530 }
1531
1532 #ifndef COFF_WITH_PE
1533 /* Skip section symbols for sections which are not going to be
1534 emitted. */
1535 if (!skip
1536 && !dont_skip_symbol
1537 && isym.n_sclass == C_STAT
1538 && isym.n_type == T_NULL
1539 && isym.n_numaux > 0
1540 && ((*secpp)->output_section == bfd_abs_section_ptr
1541 || bfd_section_removed_from_list (output_bfd,
1542 (*secpp)->output_section)))
1543 skip = TRUE;
1544 #endif
1545
1546 /* If we stripping debugging symbols, and this is a debugging
1547 symbol, then skip it. FIXME: gas sets the section to N_ABS
1548 for some types of debugging symbols; I don't know if this is
1549 a bug or not. In any case, we handle it here. */
1550 if (! skip
1551 && finfo->info->strip == strip_debugger
1552 && ! dont_skip_symbol
1553 && (isym.n_scnum == N_DEBUG
1554 || (isym.n_scnum == N_ABS
1555 && (isym.n_sclass == C_AUTO
1556 || isym.n_sclass == C_REG
1557 || isym.n_sclass == C_MOS
1558 || isym.n_sclass == C_MOE
1559 || isym.n_sclass == C_MOU
1560 || isym.n_sclass == C_ARG
1561 || isym.n_sclass == C_REGPARM
1562 || isym.n_sclass == C_FIELD
1563 || isym.n_sclass == C_EOS))))
1564 skip = TRUE;
1565
1566 /* If some symbols are stripped based on the name, work out the
1567 name and decide whether to skip this symbol. */
1568 if (! skip
1569 && (finfo->info->strip == strip_some
1570 || finfo->info->discard == discard_l))
1571 {
1572 const char *name;
1573 char buf[SYMNMLEN + 1];
1574
1575 name = _bfd_coff_internal_syment_name (input_bfd, &isym, buf);
1576 if (name == NULL)
1577 return FALSE;
1578
1579 if (! dont_skip_symbol
1580 && ((finfo->info->strip == strip_some
1581 && (bfd_hash_lookup (finfo->info->keep_hash, name, FALSE,
1582 FALSE) == NULL))
1583 || (! global
1584 && finfo->info->discard == discard_l
1585 && bfd_is_local_label_name (input_bfd, name))))
1586 skip = TRUE;
1587 }
1588
1589 /* If this is an enum, struct, or union tag, see if we have
1590 already output an identical type. */
1591 if (! skip
1592 && (finfo->output_bfd->flags & BFD_TRADITIONAL_FORMAT) == 0
1593 && (isym.n_sclass == C_ENTAG
1594 || isym.n_sclass == C_STRTAG
1595 || isym.n_sclass == C_UNTAG)
1596 && isym.n_numaux == 1)
1597 {
1598 const char *name;
1599 char buf[SYMNMLEN + 1];
1600 struct coff_debug_merge_hash_entry *mh;
1601 struct coff_debug_merge_type *mt;
1602 union internal_auxent aux;
1603 struct coff_debug_merge_element **epp;
1604 bfd_byte *esl, *eslend;
1605 struct internal_syment *islp;
1606 bfd_size_type amt;
1607
1608 name = _bfd_coff_internal_syment_name (input_bfd, &isym, buf);
1609 if (name == NULL)
1610 return FALSE;
1611
1612 /* Ignore fake names invented by compiler; treat them all as
1613 the same name. */
1614 if (*name == '~' || *name == '.' || *name == '$'
1615 || (*name == bfd_get_symbol_leading_char (input_bfd)
1616 && (name[1] == '~' || name[1] == '.' || name[1] == '$')))
1617 name = "";
1618
1619 mh = coff_debug_merge_hash_lookup (&finfo->debug_merge, name,
1620 TRUE, TRUE);
1621 if (mh == NULL)
1622 return FALSE;
1623
1624 /* Allocate memory to hold type information. If this turns
1625 out to be a duplicate, we pass this address to
1626 bfd_release. */
1627 amt = sizeof (struct coff_debug_merge_type);
1628 mt = (struct coff_debug_merge_type *) bfd_alloc (input_bfd, amt);
1629 if (mt == NULL)
1630 return FALSE;
1631 mt->type_class = isym.n_sclass;
1632
1633 /* Pick up the aux entry, which points to the end of the tag
1634 entries. */
1635 bfd_coff_swap_aux_in (input_bfd, (esym + isymesz),
1636 isym.n_type, isym.n_sclass, 0, isym.n_numaux,
1637 &aux);
1638
1639 /* Gather the elements. */
1640 epp = &mt->elements;
1641 mt->elements = NULL;
1642 islp = isymp + 2;
1643 esl = esym + 2 * isymesz;
1644 eslend = ((bfd_byte *) obj_coff_external_syms (input_bfd)
1645 + aux.x_sym.x_fcnary.x_fcn.x_endndx.l * isymesz);
1646 while (esl < eslend)
1647 {
1648 const char *elename;
1649 char elebuf[SYMNMLEN + 1];
1650 char *name_copy;
1651
1652 bfd_coff_swap_sym_in (input_bfd, esl, islp);
1653
1654 amt = sizeof (struct coff_debug_merge_element);
1655 *epp = (struct coff_debug_merge_element *)
1656 bfd_alloc (input_bfd, amt);
1657 if (*epp == NULL)
1658 return FALSE;
1659
1660 elename = _bfd_coff_internal_syment_name (input_bfd, islp,
1661 elebuf);
1662 if (elename == NULL)
1663 return FALSE;
1664
1665 amt = strlen (elename) + 1;
1666 name_copy = (char *) bfd_alloc (input_bfd, amt);
1667 if (name_copy == NULL)
1668 return FALSE;
1669 strcpy (name_copy, elename);
1670
1671 (*epp)->name = name_copy;
1672 (*epp)->type = islp->n_type;
1673 (*epp)->tagndx = 0;
1674 if (islp->n_numaux >= 1
1675 && islp->n_type != T_NULL
1676 && islp->n_sclass != C_EOS)
1677 {
1678 union internal_auxent eleaux;
1679 long indx;
1680
1681 bfd_coff_swap_aux_in (input_bfd, (esl + isymesz),
1682 islp->n_type, islp->n_sclass, 0,
1683 islp->n_numaux, &eleaux);
1684 indx = eleaux.x_sym.x_tagndx.l;
1685
1686 /* FIXME: If this tagndx entry refers to a symbol
1687 defined later in this file, we just ignore it.
1688 Handling this correctly would be tedious, and may
1689 not be required. */
1690 if (indx > 0
1691 && (indx
1692 < ((esym -
1693 (bfd_byte *) obj_coff_external_syms (input_bfd))
1694 / (long) isymesz)))
1695 {
1696 (*epp)->tagndx = finfo->sym_indices[indx];
1697 if ((*epp)->tagndx < 0)
1698 (*epp)->tagndx = 0;
1699 }
1700 }
1701 epp = &(*epp)->next;
1702 *epp = NULL;
1703
1704 esl += (islp->n_numaux + 1) * isymesz;
1705 islp += islp->n_numaux + 1;
1706 }
1707
1708 /* See if we already have a definition which matches this
1709 type. We always output the type if it has no elements,
1710 for simplicity. */
1711 if (mt->elements == NULL)
1712 bfd_release (input_bfd, mt);
1713 else
1714 {
1715 struct coff_debug_merge_type *mtl;
1716
1717 for (mtl = mh->types; mtl != NULL; mtl = mtl->next)
1718 {
1719 struct coff_debug_merge_element *me, *mel;
1720
1721 if (mtl->type_class != mt->type_class)
1722 continue;
1723
1724 for (me = mt->elements, mel = mtl->elements;
1725 me != NULL && mel != NULL;
1726 me = me->next, mel = mel->next)
1727 {
1728 if (strcmp (me->name, mel->name) != 0
1729 || me->type != mel->type
1730 || me->tagndx != mel->tagndx)
1731 break;
1732 }
1733
1734 if (me == NULL && mel == NULL)
1735 break;
1736 }
1737
1738 if (mtl == NULL || (bfd_size_type) mtl->indx >= syment_base)
1739 {
1740 /* This is the first definition of this type. */
1741 mt->indx = output_index;
1742 mt->next = mh->types;
1743 mh->types = mt;
1744 }
1745 else
1746 {
1747 /* This is a redefinition which can be merged. */
1748 bfd_release (input_bfd, mt);
1749 *indexp = mtl->indx;
1750 add = (eslend - esym) / isymesz;
1751 skip = TRUE;
1752 }
1753 }
1754 }
1755
1756 /* We now know whether we are to skip this symbol or not. */
1757 if (! skip)
1758 {
1759 /* Adjust the symbol in order to output it. */
1760
1761 if (isym._n._n_n._n_zeroes == 0
1762 && isym._n._n_n._n_offset != 0)
1763 {
1764 const char *name;
1765 bfd_size_type indx;
1766
1767 /* This symbol has a long name. Enter it in the string
1768 table we are building. Note that we do not check
1769 bfd_coff_symname_in_debug. That is only true for
1770 XCOFF, and XCOFF requires different linking code
1771 anyhow. */
1772 name = _bfd_coff_internal_syment_name (input_bfd, &isym, NULL);
1773 if (name == NULL)
1774 return FALSE;
1775 indx = _bfd_stringtab_add (finfo->strtab, name, hash, copy);
1776 if (indx == (bfd_size_type) -1)
1777 return FALSE;
1778 isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx;
1779 }
1780
1781 switch (isym.n_sclass)
1782 {
1783 case C_AUTO:
1784 case C_MOS:
1785 case C_EOS:
1786 case C_MOE:
1787 case C_MOU:
1788 case C_UNTAG:
1789 case C_STRTAG:
1790 case C_ENTAG:
1791 case C_TPDEF:
1792 case C_ARG:
1793 case C_USTATIC:
1794 case C_REG:
1795 case C_REGPARM:
1796 case C_FIELD:
1797 /* The symbol value should not be modified. */
1798 break;
1799
1800 case C_FCN:
1801 if (obj_pe (input_bfd)
1802 && strcmp (isym.n_name, ".bf") != 0
1803 && isym.n_scnum > 0)
1804 {
1805 /* For PE, .lf and .ef get their value left alone,
1806 while .bf gets relocated. However, they all have
1807 "real" section numbers, and need to be moved into
1808 the new section. */
1809 isym.n_scnum = (*secpp)->output_section->target_index;
1810 break;
1811 }
1812 /* Fall through. */
1813 default:
1814 case C_LABEL: /* Not completely sure about these 2 */
1815 case C_EXTDEF:
1816 case C_BLOCK:
1817 case C_EFCN:
1818 case C_NULL:
1819 case C_EXT:
1820 case C_STAT:
1821 case C_SECTION:
1822 case C_NT_WEAK:
1823 /* Compute new symbol location. */
1824 if (isym.n_scnum > 0)
1825 {
1826 isym.n_scnum = (*secpp)->output_section->target_index;
1827 isym.n_value += (*secpp)->output_offset;
1828 if (! obj_pe (input_bfd))
1829 isym.n_value -= (*secpp)->vma;
1830 if (! obj_pe (finfo->output_bfd))
1831 isym.n_value += (*secpp)->output_section->vma;
1832 }
1833 break;
1834
1835 case C_FILE:
1836 /* The value of a C_FILE symbol is the symbol index of
1837 the next C_FILE symbol. The value of the last C_FILE
1838 symbol is the symbol index to the first external
1839 symbol (actually, coff_renumber_symbols does not get
1840 this right--it just sets the value of the last C_FILE
1841 symbol to zero--and nobody has ever complained about
1842 it). We try to get this right, below, just before we
1843 write the symbols out, but in the general case we may
1844 have to write the symbol out twice. */
1845 if (finfo->last_file_index != -1
1846 && finfo->last_file.n_value != (bfd_vma) output_index)
1847 {
1848 /* We must correct the value of the last C_FILE
1849 entry. */
1850 finfo->last_file.n_value = output_index;
1851 if ((bfd_size_type) finfo->last_file_index >= syment_base)
1852 {
1853 /* The last C_FILE symbol is in this input file. */
1854 bfd_coff_swap_sym_out (output_bfd,
1855 &finfo->last_file,
1856 (finfo->outsyms
1857 + ((finfo->last_file_index
1858 - syment_base)
1859 * osymesz)));
1860 }
1861 else
1862 {
1863 file_ptr pos;
1864
1865 /* We have already written out the last C_FILE
1866 symbol. We need to write it out again. We
1867 borrow *outsym temporarily. */
1868 bfd_coff_swap_sym_out (output_bfd,
1869 &finfo->last_file, outsym);
1870 pos = obj_sym_filepos (output_bfd);
1871 pos += finfo->last_file_index * osymesz;
1872 if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
1873 || bfd_bwrite (outsym, osymesz, output_bfd) != osymesz)
1874 return FALSE;
1875 }
1876 }
1877
1878 finfo->last_file_index = output_index;
1879 finfo->last_file = isym;
1880 break;
1881 }
1882
1883 /* If doing task linking, convert normal global function symbols to
1884 static functions. */
1885 if (finfo->info->task_link && IS_EXTERNAL (input_bfd, isym))
1886 isym.n_sclass = C_STAT;
1887
1888 /* Output the symbol. */
1889 bfd_coff_swap_sym_out (output_bfd, &isym, outsym);
1890
1891 *indexp = output_index;
1892
1893 if (global)
1894 {
1895 long indx;
1896 struct coff_link_hash_entry *h;
1897
1898 indx = ((esym - (bfd_byte *) obj_coff_external_syms (input_bfd))
1899 / isymesz);
1900 h = obj_coff_sym_hashes (input_bfd)[indx];
1901 if (h == NULL)
1902 {
1903 /* This can happen if there were errors earlier in
1904 the link. */
1905 bfd_set_error (bfd_error_bad_value);
1906 return FALSE;
1907 }
1908 h->indx = output_index;
1909 }
1910
1911 output_index += add;
1912 outsym += add * osymesz;
1913 }
1914
1915 esym += add * isymesz;
1916 isymp += add;
1917 ++secpp;
1918 ++indexp;
1919 for (--add; add > 0; --add)
1920 {
1921 *secpp++ = NULL;
1922 *indexp++ = -1;
1923 }
1924 }
1925
1926 /* Fix up the aux entries. This must be done in a separate pass,
1927 because we don't know the correct symbol indices until we have
1928 already decided which symbols we are going to keep. */
1929 esym = (bfd_byte *) obj_coff_external_syms (input_bfd);
1930 esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz;
1931 isymp = finfo->internal_syms;
1932 indexp = finfo->sym_indices;
1933 sym_hash = obj_coff_sym_hashes (input_bfd);
1934 outsym = finfo->outsyms;
1935
1936 while (esym < esym_end)
1937 {
1938 int add;
1939
1940 add = 1 + isymp->n_numaux;
1941
1942 if ((*indexp < 0
1943 || (bfd_size_type) *indexp < syment_base)
1944 && (*sym_hash == NULL
1945 || (*sym_hash)->auxbfd != input_bfd))
1946 esym += add * isymesz;
1947 else
1948 {
1949 struct coff_link_hash_entry *h;
1950 int i;
1951
1952 h = NULL;
1953 if (*indexp < 0)
1954 {
1955 h = *sym_hash;
1956
1957 /* The m68k-motorola-sysv assembler will sometimes
1958 generate two symbols with the same name, but only one
1959 will have aux entries. */
1960 BFD_ASSERT (isymp->n_numaux == 0
1961 || h->numaux == 0
1962 || h->numaux == isymp->n_numaux);
1963 }
1964
1965 esym += isymesz;
1966
1967 if (h == NULL)
1968 outsym += osymesz;
1969
1970 /* Handle the aux entries. This handling is based on
1971 coff_pointerize_aux. I don't know if it always correct. */
1972 for (i = 0; i < isymp->n_numaux && esym < esym_end; i++)
1973 {
1974 union internal_auxent aux;
1975 union internal_auxent *auxp;
1976
1977 if (h != NULL && h->aux != NULL && (h->numaux > i))
1978 auxp = h->aux + i;
1979 else
1980 {
1981 bfd_coff_swap_aux_in (input_bfd, esym, isymp->n_type,
1982 isymp->n_sclass, i, isymp->n_numaux, &aux);
1983 auxp = &aux;
1984 }
1985
1986 if (isymp->n_sclass == C_FILE)
1987 {
1988 /* If this is a long filename, we must put it in the
1989 string table. */
1990 if (auxp->x_file.x_n.x_zeroes == 0
1991 && auxp->x_file.x_n.x_offset != 0)
1992 {
1993 const char *filename;
1994 bfd_size_type indx;
1995
1996 BFD_ASSERT (auxp->x_file.x_n.x_offset
1997 >= STRING_SIZE_SIZE);
1998 if (strings == NULL)
1999 {
2000 strings = _bfd_coff_read_string_table (input_bfd);
2001 if (strings == NULL)
2002 return FALSE;
2003 }
2004 filename = strings + auxp->x_file.x_n.x_offset;
2005 indx = _bfd_stringtab_add (finfo->strtab, filename,
2006 hash, copy);
2007 if (indx == (bfd_size_type) -1)
2008 return FALSE;
2009 auxp->x_file.x_n.x_offset = STRING_SIZE_SIZE + indx;
2010 }
2011 }
2012 else if ((isymp->n_sclass != C_STAT || isymp->n_type != T_NULL)
2013 && isymp->n_sclass != C_NT_WEAK)
2014 {
2015 unsigned long indx;
2016
2017 if (ISFCN (isymp->n_type)
2018 || ISTAG (isymp->n_sclass)
2019 || isymp->n_sclass == C_BLOCK
2020 || isymp->n_sclass == C_FCN)
2021 {
2022 indx = auxp->x_sym.x_fcnary.x_fcn.x_endndx.l;
2023 if (indx > 0
2024 && indx < obj_raw_syment_count (input_bfd))
2025 {
2026 /* We look forward through the symbol for
2027 the index of the next symbol we are going
2028 to include. I don't know if this is
2029 entirely right. */
2030 while ((finfo->sym_indices[indx] < 0
2031 || ((bfd_size_type) finfo->sym_indices[indx]
2032 < syment_base))
2033 && indx < obj_raw_syment_count (input_bfd))
2034 ++indx;
2035 if (indx >= obj_raw_syment_count (input_bfd))
2036 indx = output_index;
2037 else
2038 indx = finfo->sym_indices[indx];
2039 auxp->x_sym.x_fcnary.x_fcn.x_endndx.l = indx;
2040 }
2041 }
2042
2043 indx = auxp->x_sym.x_tagndx.l;
2044 if (indx > 0 && indx < obj_raw_syment_count (input_bfd))
2045 {
2046 long symindx;
2047
2048 symindx = finfo->sym_indices[indx];
2049 if (symindx < 0)
2050 auxp->x_sym.x_tagndx.l = 0;
2051 else
2052 auxp->x_sym.x_tagndx.l = symindx;
2053 }
2054
2055 /* The .bf symbols are supposed to be linked through
2056 the endndx field. We need to carry this list
2057 across object files. */
2058 if (i == 0
2059 && h == NULL
2060 && isymp->n_sclass == C_FCN
2061 && (isymp->_n._n_n._n_zeroes != 0
2062 || isymp->_n._n_n._n_offset == 0)
2063 && isymp->_n._n_name[0] == '.'
2064 && isymp->_n._n_name[1] == 'b'
2065 && isymp->_n._n_name[2] == 'f'
2066 && isymp->_n._n_name[3] == '\0')
2067 {
2068 if (finfo->last_bf_index != -1)
2069 {
2070 finfo->last_bf.x_sym.x_fcnary.x_fcn.x_endndx.l =
2071 *indexp;
2072
2073 if ((bfd_size_type) finfo->last_bf_index
2074 >= syment_base)
2075 {
2076 void *auxout;
2077
2078 /* The last .bf symbol is in this input
2079 file. This will only happen if the
2080 assembler did not set up the .bf
2081 endndx symbols correctly. */
2082 auxout = (finfo->outsyms
2083 + ((finfo->last_bf_index
2084 - syment_base)
2085 * osymesz));
2086
2087 bfd_coff_swap_aux_out (output_bfd,
2088 &finfo->last_bf,
2089 isymp->n_type,
2090 isymp->n_sclass,
2091 0, isymp->n_numaux,
2092 auxout);
2093 }
2094 else
2095 {
2096 file_ptr pos;
2097
2098 /* We have already written out the last
2099 .bf aux entry. We need to write it
2100 out again. We borrow *outsym
2101 temporarily. FIXME: This case should
2102 be made faster. */
2103 bfd_coff_swap_aux_out (output_bfd,
2104 &finfo->last_bf,
2105 isymp->n_type,
2106 isymp->n_sclass,
2107 0, isymp->n_numaux,
2108 outsym);
2109 pos = obj_sym_filepos (output_bfd);
2110 pos += finfo->last_bf_index * osymesz;
2111 if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
2112 || (bfd_bwrite (outsym, osymesz, output_bfd)
2113 != osymesz))
2114 return FALSE;
2115 }
2116 }
2117
2118 if (auxp->x_sym.x_fcnary.x_fcn.x_endndx.l != 0)
2119 finfo->last_bf_index = -1;
2120 else
2121 {
2122 /* The endndx field of this aux entry must
2123 be updated with the symbol number of the
2124 next .bf symbol. */
2125 finfo->last_bf = *auxp;
2126 finfo->last_bf_index = (((outsym - finfo->outsyms)
2127 / osymesz)
2128 + syment_base);
2129 }
2130 }
2131 }
2132
2133 if (h == NULL)
2134 {
2135 bfd_coff_swap_aux_out (output_bfd, auxp, isymp->n_type,
2136 isymp->n_sclass, i, isymp->n_numaux,
2137 outsym);
2138 outsym += osymesz;
2139 }
2140
2141 esym += isymesz;
2142 }
2143 }
2144
2145 indexp += add;
2146 isymp += add;
2147 sym_hash += add;
2148 }
2149
2150 /* Relocate the line numbers, unless we are stripping them. */
2151 if (finfo->info->strip == strip_none
2152 || finfo->info->strip == strip_some)
2153 {
2154 for (o = input_bfd->sections; o != NULL; o = o->next)
2155 {
2156 bfd_vma offset;
2157 bfd_byte *eline;
2158 bfd_byte *elineend;
2159 bfd_byte *oeline;
2160 bfd_boolean skipping;
2161 file_ptr pos;
2162 bfd_size_type amt;
2163
2164 /* FIXME: If SEC_HAS_CONTENTS is not for the section, then
2165 build_link_order in ldwrite.c will not have created a
2166 link order, which means that we will not have seen this
2167 input section in _bfd_coff_final_link, which means that
2168 we will not have allocated space for the line numbers of
2169 this section. I don't think line numbers can be
2170 meaningful for a section which does not have
2171 SEC_HAS_CONTENTS set, but, if they do, this must be
2172 changed. */
2173 if (o->lineno_count == 0
2174 || (o->output_section->flags & SEC_HAS_CONTENTS) == 0)
2175 continue;
2176
2177 if (bfd_seek (input_bfd, o->line_filepos, SEEK_SET) != 0
2178 || bfd_bread (finfo->linenos, linesz * o->lineno_count,
2179 input_bfd) != linesz * o->lineno_count)
2180 return FALSE;
2181
2182 offset = o->output_section->vma + o->output_offset - o->vma;
2183 eline = finfo->linenos;
2184 oeline = finfo->linenos;
2185 elineend = eline + linesz * o->lineno_count;
2186 skipping = FALSE;
2187 for (; eline < elineend; eline += linesz)
2188 {
2189 struct internal_lineno iline;
2190
2191 bfd_coff_swap_lineno_in (input_bfd, eline, &iline);
2192
2193 if (iline.l_lnno != 0)
2194 iline.l_addr.l_paddr += offset;
2195 else if (iline.l_addr.l_symndx >= 0
2196 && ((unsigned long) iline.l_addr.l_symndx
2197 < obj_raw_syment_count (input_bfd)))
2198 {
2199 long indx;
2200
2201 indx = finfo->sym_indices[iline.l_addr.l_symndx];
2202
2203 if (indx < 0)
2204 {
2205 /* These line numbers are attached to a symbol
2206 which we are stripping. We must discard the
2207 line numbers because reading them back with
2208 no associated symbol (or associating them all
2209 with symbol #0) will fail. We can't regain
2210 the space in the output file, but at least
2211 they're dense. */
2212 skipping = TRUE;
2213 }
2214 else
2215 {
2216 struct internal_syment is;
2217 union internal_auxent ia;
2218
2219 /* Fix up the lnnoptr field in the aux entry of
2220 the symbol. It turns out that we can't do
2221 this when we modify the symbol aux entries,
2222 because gas sometimes screws up the lnnoptr
2223 field and makes it an offset from the start
2224 of the line numbers rather than an absolute
2225 file index. */
2226 bfd_coff_swap_sym_in (output_bfd,
2227 (finfo->outsyms
2228 + ((indx - syment_base)
2229 * osymesz)), &is);
2230 if ((ISFCN (is.n_type)
2231 || is.n_sclass == C_BLOCK)
2232 && is.n_numaux >= 1)
2233 {
2234 void *auxptr;
2235
2236 auxptr = (finfo->outsyms
2237 + ((indx - syment_base + 1)
2238 * osymesz));
2239 bfd_coff_swap_aux_in (output_bfd, auxptr,
2240 is.n_type, is.n_sclass,
2241 0, is.n_numaux, &ia);
2242 ia.x_sym.x_fcnary.x_fcn.x_lnnoptr =
2243 (o->output_section->line_filepos
2244 + o->output_section->lineno_count * linesz
2245 + eline - finfo->linenos);
2246 bfd_coff_swap_aux_out (output_bfd, &ia,
2247 is.n_type, is.n_sclass, 0,
2248 is.n_numaux, auxptr);
2249 }
2250
2251 skipping = FALSE;
2252 }
2253
2254 iline.l_addr.l_symndx = indx;
2255 }
2256
2257 if (!skipping)
2258 {
2259 bfd_coff_swap_lineno_out (output_bfd, &iline, oeline);
2260 oeline += linesz;
2261 }
2262 }
2263
2264 pos = o->output_section->line_filepos;
2265 pos += o->output_section->lineno_count * linesz;
2266 amt = oeline - finfo->linenos;
2267 if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
2268 || bfd_bwrite (finfo->linenos, amt, output_bfd) != amt)
2269 return FALSE;
2270
2271 o->output_section->lineno_count += amt / linesz;
2272 }
2273 }
2274
2275 /* If we swapped out a C_FILE symbol, guess that the next C_FILE
2276 symbol will be the first symbol in the next input file. In the
2277 normal case, this will save us from writing out the C_FILE symbol
2278 again. */
2279 if (finfo->last_file_index != -1
2280 && (bfd_size_type) finfo->last_file_index >= syment_base)
2281 {
2282 finfo->last_file.n_value = output_index;
2283 bfd_coff_swap_sym_out (output_bfd, &finfo->last_file,
2284 (finfo->outsyms
2285 + ((finfo->last_file_index - syment_base)
2286 * osymesz)));
2287 }
2288
2289 /* Write the modified symbols to the output file. */
2290 if (outsym > finfo->outsyms)
2291 {
2292 file_ptr pos;
2293 bfd_size_type amt;
2294
2295 pos = obj_sym_filepos (output_bfd) + syment_base * osymesz;
2296 amt = outsym - finfo->outsyms;
2297 if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
2298 || bfd_bwrite (finfo->outsyms, amt, output_bfd) != amt)
2299 return FALSE;
2300
2301 BFD_ASSERT ((obj_raw_syment_count (output_bfd)
2302 + (outsym - finfo->outsyms) / osymesz)
2303 == output_index);
2304
2305 obj_raw_syment_count (output_bfd) = output_index;
2306 }
2307
2308 /* Relocate the contents of each section. */
2309 adjust_symndx = coff_backend_info (input_bfd)->_bfd_coff_adjust_symndx;
2310 for (o = input_bfd->sections; o != NULL; o = o->next)
2311 {
2312 bfd_byte *contents;
2313 struct coff_section_tdata *secdata;
2314
2315 if (! o->linker_mark)
2316 /* This section was omitted from the link. */
2317 continue;
2318
2319 if ((o->flags & SEC_LINKER_CREATED) != 0)
2320 continue;
2321
2322 if ((o->flags & SEC_HAS_CONTENTS) == 0
2323 || (o->size == 0 && (o->flags & SEC_RELOC) == 0))
2324 {
2325 if ((o->flags & SEC_RELOC) != 0
2326 && o->reloc_count != 0)
2327 {
2328 (*_bfd_error_handler)
2329 (_("%B: relocs in section `%A', but it has no contents"),
2330 input_bfd, o);
2331 bfd_set_error (bfd_error_no_contents);
2332 return FALSE;
2333 }
2334
2335 continue;
2336 }
2337
2338 secdata = coff_section_data (input_bfd, o);
2339 if (secdata != NULL && secdata->contents != NULL)
2340 contents = secdata->contents;
2341 else
2342 {
2343 bfd_size_type x = o->rawsize ? o->rawsize : o->size;
2344 if (! bfd_get_section_contents (input_bfd, o, finfo->contents, 0, x))
2345 return FALSE;
2346 contents = finfo->contents;
2347 }
2348
2349 if ((o->flags & SEC_RELOC) != 0)
2350 {
2351 int target_index;
2352 struct internal_reloc *internal_relocs;
2353 struct internal_reloc *irel;
2354
2355 /* Read in the relocs. */
2356 target_index = o->output_section->target_index;
2357 internal_relocs = (_bfd_coff_read_internal_relocs
2358 (input_bfd, o, FALSE, finfo->external_relocs,
2359 finfo->info->relocatable,
2360 (finfo->info->relocatable
2361 ? (finfo->section_info[target_index].relocs
2362 + o->output_section->reloc_count)
2363 : finfo->internal_relocs)));
2364 if (internal_relocs == NULL)
2365 return FALSE;
2366
2367 /* Run through the relocs looking for relocs against symbols
2368 coming from discarded sections and complain about them. */
2369 irel = internal_relocs;
2370 for (; irel < &internal_relocs[o->reloc_count]; irel++)
2371 {
2372 struct coff_link_hash_entry *h;
2373 asection *ps = NULL;
2374 long symndx = irel->r_symndx;
2375 if (symndx < 0)
2376 continue;
2377 h = obj_coff_sym_hashes (input_bfd)[symndx];
2378 if (h == NULL)
2379 continue;
2380 while (h->root.type == bfd_link_hash_indirect
2381 || h->root.type == bfd_link_hash_warning)
2382 h = (struct coff_link_hash_entry *) h->root.u.i.link;
2383 if (h->root.type == bfd_link_hash_defined
2384 || h->root.type == bfd_link_hash_defweak)
2385 ps = h->root.u.def.section;
2386 if (ps == NULL)
2387 continue;
2388 /* Complain if definition comes from an excluded section. */
2389 if (ps->flags & SEC_EXCLUDE)
2390 (*finfo->info->callbacks->einfo)
2391 (_("%X`%s' referenced in section `%A' of %B: "
2392 "defined in discarded section `%A' of %B\n"),
2393 h->root.root.string, o, input_bfd, ps, ps->owner);
2394 }
2395
2396 /* Call processor specific code to relocate the section
2397 contents. */
2398 if (! bfd_coff_relocate_section (output_bfd, finfo->info,
2399 input_bfd, o,
2400 contents,
2401 internal_relocs,
2402 finfo->internal_syms,
2403 finfo->sec_ptrs))
2404 return FALSE;
2405
2406 if (finfo->info->relocatable)
2407 {
2408 bfd_vma offset;
2409 struct internal_reloc *irelend;
2410 struct coff_link_hash_entry **rel_hash;
2411
2412 offset = o->output_section->vma + o->output_offset - o->vma;
2413 irel = internal_relocs;
2414 irelend = irel + o->reloc_count;
2415 rel_hash = (finfo->section_info[target_index].rel_hashes
2416 + o->output_section->reloc_count);
2417 for (; irel < irelend; irel++, rel_hash++)
2418 {
2419 struct coff_link_hash_entry *h;
2420 bfd_boolean adjusted;
2421
2422 *rel_hash = NULL;
2423
2424 /* Adjust the reloc address and symbol index. */
2425 irel->r_vaddr += offset;
2426
2427 if (irel->r_symndx == -1)
2428 continue;
2429
2430 if (adjust_symndx)
2431 {
2432 if (! (*adjust_symndx) (output_bfd, finfo->info,
2433 input_bfd, o, irel,
2434 &adjusted))
2435 return FALSE;
2436 if (adjusted)
2437 continue;
2438 }
2439
2440 h = obj_coff_sym_hashes (input_bfd)[irel->r_symndx];
2441 if (h != NULL)
2442 {
2443 /* This is a global symbol. */
2444 if (h->indx >= 0)
2445 irel->r_symndx = h->indx;
2446 else
2447 {
2448 /* This symbol is being written at the end
2449 of the file, and we do not yet know the
2450 symbol index. We save the pointer to the
2451 hash table entry in the rel_hash list.
2452 We set the indx field to -2 to indicate
2453 that this symbol must not be stripped. */
2454 *rel_hash = h;
2455 h->indx = -2;
2456 }
2457 }
2458 else
2459 {
2460 long indx;
2461
2462 indx = finfo->sym_indices[irel->r_symndx];
2463 if (indx != -1)
2464 irel->r_symndx = indx;
2465 else
2466 {
2467 struct internal_syment *is;
2468 const char *name;
2469 char buf[SYMNMLEN + 1];
2470
2471 /* This reloc is against a symbol we are
2472 stripping. This should have been handled
2473 by the 'dont_skip_symbol' code in the while
2474 loop at the top of this function. */
2475 is = finfo->internal_syms + irel->r_symndx;
2476
2477 name = (_bfd_coff_internal_syment_name
2478 (input_bfd, is, buf));
2479 if (name == NULL)
2480 return FALSE;
2481
2482 if (! ((*finfo->info->callbacks->unattached_reloc)
2483 (finfo->info, name, input_bfd, o,
2484 irel->r_vaddr)))
2485 return FALSE;
2486 }
2487 }
2488 }
2489
2490 o->output_section->reloc_count += o->reloc_count;
2491 }
2492 }
2493
2494 /* Write out the modified section contents. */
2495 if (secdata == NULL || secdata->stab_info == NULL)
2496 {
2497 file_ptr loc = o->output_offset * bfd_octets_per_byte (output_bfd);
2498 if (! bfd_set_section_contents (output_bfd, o->output_section,
2499 contents, loc, o->size))
2500 return FALSE;
2501 }
2502 else
2503 {
2504 if (! (_bfd_write_section_stabs
2505 (output_bfd, &coff_hash_table (finfo->info)->stab_info,
2506 o, &secdata->stab_info, contents)))
2507 return FALSE;
2508 }
2509 }
2510
2511 if (! finfo->info->keep_memory
2512 && ! _bfd_coff_free_symbols (input_bfd))
2513 return FALSE;
2514
2515 return TRUE;
2516 }
2517
2518 /* Write out a global symbol. Called via bfd_hash_traverse. */
2519
2520 bfd_boolean
2521 _bfd_coff_write_global_sym (struct bfd_hash_entry *bh, void *data)
2522 {
2523 struct coff_link_hash_entry *h = (struct coff_link_hash_entry *) bh;
2524 struct coff_final_link_info *finfo = (struct coff_final_link_info *) data;
2525 bfd *output_bfd;
2526 struct internal_syment isym;
2527 bfd_size_type symesz;
2528 unsigned int i;
2529 file_ptr pos;
2530
2531 output_bfd = finfo->output_bfd;
2532
2533 if (h->root.type == bfd_link_hash_warning)
2534 {
2535 h = (struct coff_link_hash_entry *) h->root.u.i.link;
2536 if (h->root.type == bfd_link_hash_new)
2537 return TRUE;
2538 }
2539
2540 if (h->indx >= 0)
2541 return TRUE;
2542
2543 if (h->indx != -2
2544 && (finfo->info->strip == strip_all
2545 || (finfo->info->strip == strip_some
2546 && (bfd_hash_lookup (finfo->info->keep_hash,
2547 h->root.root.string, FALSE, FALSE)
2548 == NULL))))
2549 return TRUE;
2550
2551 switch (h->root.type)
2552 {
2553 default:
2554 case bfd_link_hash_new:
2555 case bfd_link_hash_warning:
2556 abort ();
2557 return FALSE;
2558
2559 case bfd_link_hash_undefined:
2560 case bfd_link_hash_undefweak:
2561 isym.n_scnum = N_UNDEF;
2562 isym.n_value = 0;
2563 break;
2564
2565 case bfd_link_hash_defined:
2566 case bfd_link_hash_defweak:
2567 {
2568 asection *sec;
2569
2570 sec = h->root.u.def.section->output_section;
2571 if (bfd_is_abs_section (sec))
2572 isym.n_scnum = N_ABS;
2573 else
2574 isym.n_scnum = sec->target_index;
2575 isym.n_value = (h->root.u.def.value
2576 + h->root.u.def.section->output_offset);
2577 if (! obj_pe (finfo->output_bfd))
2578 isym.n_value += sec->vma;
2579 }
2580 break;
2581
2582 case bfd_link_hash_common:
2583 isym.n_scnum = N_UNDEF;
2584 isym.n_value = h->root.u.c.size;
2585 break;
2586
2587 case bfd_link_hash_indirect:
2588 /* Just ignore these. They can't be handled anyhow. */
2589 return TRUE;
2590 }
2591
2592 if (strlen (h->root.root.string) <= SYMNMLEN)
2593 strncpy (isym._n._n_name, h->root.root.string, SYMNMLEN);
2594 else
2595 {
2596 bfd_boolean hash;
2597 bfd_size_type indx;
2598
2599 hash = TRUE;
2600 if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
2601 hash = FALSE;
2602 indx = _bfd_stringtab_add (finfo->strtab, h->root.root.string, hash,
2603 FALSE);
2604 if (indx == (bfd_size_type) -1)
2605 {
2606 finfo->failed = TRUE;
2607 return FALSE;
2608 }
2609 isym._n._n_n._n_zeroes = 0;
2610 isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx;
2611 }
2612
2613 isym.n_sclass = h->symbol_class;
2614 isym.n_type = h->type;
2615
2616 if (isym.n_sclass == C_NULL)
2617 isym.n_sclass = C_EXT;
2618
2619 /* If doing task linking and this is the pass where we convert
2620 defined globals to statics, then do that conversion now. If the
2621 symbol is not being converted, just ignore it and it will be
2622 output during a later pass. */
2623 if (finfo->global_to_static)
2624 {
2625 if (! IS_EXTERNAL (output_bfd, isym))
2626 return TRUE;
2627
2628 isym.n_sclass = C_STAT;
2629 }
2630
2631 /* When a weak symbol is not overridden by a strong one,
2632 turn it into an external symbol when not building a
2633 shared or relocatable object. */
2634 if (! finfo->info->shared
2635 && ! finfo->info->relocatable
2636 && IS_WEAK_EXTERNAL (finfo->output_bfd, isym))
2637 isym.n_sclass = C_EXT;
2638
2639 isym.n_numaux = h->numaux;
2640
2641 bfd_coff_swap_sym_out (output_bfd, &isym, finfo->outsyms);
2642
2643 symesz = bfd_coff_symesz (output_bfd);
2644
2645 pos = obj_sym_filepos (output_bfd);
2646 pos += obj_raw_syment_count (output_bfd) * symesz;
2647 if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
2648 || bfd_bwrite (finfo->outsyms, symesz, output_bfd) != symesz)
2649 {
2650 finfo->failed = TRUE;
2651 return FALSE;
2652 }
2653
2654 h->indx = obj_raw_syment_count (output_bfd);
2655
2656 ++obj_raw_syment_count (output_bfd);
2657
2658 /* Write out any associated aux entries. Most of the aux entries
2659 will have been modified in _bfd_coff_link_input_bfd. We have to
2660 handle section aux entries here, now that we have the final
2661 relocation and line number counts. */
2662 for (i = 0; i < isym.n_numaux; i++)
2663 {
2664 union internal_auxent *auxp;
2665
2666 auxp = h->aux + i;
2667
2668 /* Look for a section aux entry here using the same tests that
2669 coff_swap_aux_out uses. */
2670 if (i == 0
2671 && (isym.n_sclass == C_STAT
2672 || isym.n_sclass == C_HIDDEN)
2673 && isym.n_type == T_NULL
2674 && (h->root.type == bfd_link_hash_defined
2675 || h->root.type == bfd_link_hash_defweak))
2676 {
2677 asection *sec;
2678
2679 sec = h->root.u.def.section->output_section;
2680 if (sec != NULL)
2681 {
2682 auxp->x_scn.x_scnlen = sec->size;
2683
2684 /* For PE, an overflow on the final link reportedly does
2685 not matter. FIXME: Why not? */
2686 if (sec->reloc_count > 0xffff
2687 && (! obj_pe (output_bfd)
2688 || finfo->info->relocatable))
2689 (*_bfd_error_handler)
2690 (_("%s: %s: reloc overflow: 0x%lx > 0xffff"),
2691 bfd_get_filename (output_bfd),
2692 bfd_get_section_name (output_bfd, sec),
2693 sec->reloc_count);
2694
2695 if (sec->lineno_count > 0xffff
2696 && (! obj_pe (output_bfd)
2697 || finfo->info->relocatable))
2698 (*_bfd_error_handler)
2699 (_("%s: warning: %s: line number overflow: 0x%lx > 0xffff"),
2700 bfd_get_filename (output_bfd),
2701 bfd_get_section_name (output_bfd, sec),
2702 sec->lineno_count);
2703
2704 auxp->x_scn.x_nreloc = sec->reloc_count;
2705 auxp->x_scn.x_nlinno = sec->lineno_count;
2706 auxp->x_scn.x_checksum = 0;
2707 auxp->x_scn.x_associated = 0;
2708 auxp->x_scn.x_comdat = 0;
2709 }
2710 }
2711
2712 bfd_coff_swap_aux_out (output_bfd, auxp, isym.n_type,
2713 isym.n_sclass, (int) i, isym.n_numaux,
2714 finfo->outsyms);
2715 if (bfd_bwrite (finfo->outsyms, symesz, output_bfd) != symesz)
2716 {
2717 finfo->failed = TRUE;
2718 return FALSE;
2719 }
2720 ++obj_raw_syment_count (output_bfd);
2721 }
2722
2723 return TRUE;
2724 }
2725
2726 /* Write out task global symbols, converting them to statics. Called
2727 via coff_link_hash_traverse. Calls bfd_coff_write_global_sym to do
2728 the dirty work, if the symbol we are processing needs conversion. */
2729
2730 bfd_boolean
2731 _bfd_coff_write_task_globals (struct coff_link_hash_entry *h, void *data)
2732 {
2733 struct coff_final_link_info *finfo = (struct coff_final_link_info *) data;
2734 bfd_boolean rtnval = TRUE;
2735 bfd_boolean save_global_to_static;
2736
2737 if (h->root.type == bfd_link_hash_warning)
2738 h = (struct coff_link_hash_entry *) h->root.u.i.link;
2739
2740 if (h->indx < 0)
2741 {
2742 switch (h->root.type)
2743 {
2744 case bfd_link_hash_defined:
2745 case bfd_link_hash_defweak:
2746 save_global_to_static = finfo->global_to_static;
2747 finfo->global_to_static = TRUE;
2748 rtnval = _bfd_coff_write_global_sym (&h->root.root, data);
2749 finfo->global_to_static = save_global_to_static;
2750 break;
2751 default:
2752 break;
2753 }
2754 }
2755 return (rtnval);
2756 }
2757
2758 /* Handle a link order which is supposed to generate a reloc. */
2759
2760 bfd_boolean
2761 _bfd_coff_reloc_link_order (bfd *output_bfd,
2762 struct coff_final_link_info *finfo,
2763 asection *output_section,
2764 struct bfd_link_order *link_order)
2765 {
2766 reloc_howto_type *howto;
2767 struct internal_reloc *irel;
2768 struct coff_link_hash_entry **rel_hash_ptr;
2769
2770 howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc);
2771 if (howto == NULL)
2772 {
2773 bfd_set_error (bfd_error_bad_value);
2774 return FALSE;
2775 }
2776
2777 if (link_order->u.reloc.p->addend != 0)
2778 {
2779 bfd_size_type size;
2780 bfd_byte *buf;
2781 bfd_reloc_status_type rstat;
2782 bfd_boolean ok;
2783 file_ptr loc;
2784
2785 size = bfd_get_reloc_size (howto);
2786 buf = (bfd_byte *) bfd_zmalloc (size);
2787 if (buf == NULL)
2788 return FALSE;
2789
2790 rstat = _bfd_relocate_contents (howto, output_bfd,
2791 (bfd_vma) link_order->u.reloc.p->addend,\
2792 buf);
2793 switch (rstat)
2794 {
2795 case bfd_reloc_ok:
2796 break;
2797 default:
2798 case bfd_reloc_outofrange:
2799 abort ();
2800 case bfd_reloc_overflow:
2801 if (! ((*finfo->info->callbacks->reloc_overflow)
2802 (finfo->info, NULL,
2803 (link_order->type == bfd_section_reloc_link_order
2804 ? bfd_section_name (output_bfd,
2805 link_order->u.reloc.p->u.section)
2806 : link_order->u.reloc.p->u.name),
2807 howto->name, link_order->u.reloc.p->addend,
2808 (bfd *) NULL, (asection *) NULL, (bfd_vma) 0)))
2809 {
2810 free (buf);
2811 return FALSE;
2812 }
2813 break;
2814 }
2815 loc = link_order->offset * bfd_octets_per_byte (output_bfd);
2816 ok = bfd_set_section_contents (output_bfd, output_section, buf,
2817 loc, size);
2818 free (buf);
2819 if (! ok)
2820 return FALSE;
2821 }
2822
2823 /* Store the reloc information in the right place. It will get
2824 swapped and written out at the end of the final_link routine. */
2825 irel = (finfo->section_info[output_section->target_index].relocs
2826 + output_section->reloc_count);
2827 rel_hash_ptr = (finfo->section_info[output_section->target_index].rel_hashes
2828 + output_section->reloc_count);
2829
2830 memset (irel, 0, sizeof (struct internal_reloc));
2831 *rel_hash_ptr = NULL;
2832
2833 irel->r_vaddr = output_section->vma + link_order->offset;
2834
2835 if (link_order->type == bfd_section_reloc_link_order)
2836 {
2837 /* We need to somehow locate a symbol in the right section. The
2838 symbol must either have a value of zero, or we must adjust
2839 the addend by the value of the symbol. FIXME: Write this
2840 when we need it. The old linker couldn't handle this anyhow. */
2841 abort ();
2842 *rel_hash_ptr = NULL;
2843 irel->r_symndx = 0;
2844 }
2845 else
2846 {
2847 struct coff_link_hash_entry *h;
2848
2849 h = ((struct coff_link_hash_entry *)
2850 bfd_wrapped_link_hash_lookup (output_bfd, finfo->info,
2851 link_order->u.reloc.p->u.name,
2852 FALSE, FALSE, TRUE));
2853 if (h != NULL)
2854 {
2855 if (h->indx >= 0)
2856 irel->r_symndx = h->indx;
2857 else
2858 {
2859 /* Set the index to -2 to force this symbol to get
2860 written out. */
2861 h->indx = -2;
2862 *rel_hash_ptr = h;
2863 irel->r_symndx = 0;
2864 }
2865 }
2866 else
2867 {
2868 if (! ((*finfo->info->callbacks->unattached_reloc)
2869 (finfo->info, link_order->u.reloc.p->u.name, (bfd *) NULL,
2870 (asection *) NULL, (bfd_vma) 0)))
2871 return FALSE;
2872 irel->r_symndx = 0;
2873 }
2874 }
2875
2876 /* FIXME: Is this always right? */
2877 irel->r_type = howto->type;
2878
2879 /* r_size is only used on the RS/6000, which needs its own linker
2880 routines anyhow. r_extern is only used for ECOFF. */
2881
2882 /* FIXME: What is the right value for r_offset? Is zero OK? */
2883 ++output_section->reloc_count;
2884
2885 return TRUE;
2886 }
2887
2888 /* A basic reloc handling routine which may be used by processors with
2889 simple relocs. */
2890
2891 bfd_boolean
2892 _bfd_coff_generic_relocate_section (bfd *output_bfd,
2893 struct bfd_link_info *info,
2894 bfd *input_bfd,
2895 asection *input_section,
2896 bfd_byte *contents,
2897 struct internal_reloc *relocs,
2898 struct internal_syment *syms,
2899 asection **sections)
2900 {
2901 struct internal_reloc *rel;
2902 struct internal_reloc *relend;
2903
2904 rel = relocs;
2905 relend = rel + input_section->reloc_count;
2906 for (; rel < relend; rel++)
2907 {
2908 long symndx;
2909 struct coff_link_hash_entry *h;
2910 struct internal_syment *sym;
2911 bfd_vma addend;
2912 bfd_vma val;
2913 reloc_howto_type *howto;
2914 bfd_reloc_status_type rstat;
2915
2916 symndx = rel->r_symndx;
2917
2918 if (symndx == -1)
2919 {
2920 h = NULL;
2921 sym = NULL;
2922 }
2923 else if (symndx < 0
2924 || (unsigned long) symndx >= obj_raw_syment_count (input_bfd))
2925 {
2926 (*_bfd_error_handler)
2927 ("%B: illegal symbol index %ld in relocs", input_bfd, symndx);
2928 return FALSE;
2929 }
2930 else
2931 {
2932 h = obj_coff_sym_hashes (input_bfd)[symndx];
2933 sym = syms + symndx;
2934 }
2935
2936 /* COFF treats common symbols in one of two ways. Either the
2937 size of the symbol is included in the section contents, or it
2938 is not. We assume that the size is not included, and force
2939 the rtype_to_howto function to adjust the addend as needed. */
2940 if (sym != NULL && sym->n_scnum != 0)
2941 addend = - sym->n_value;
2942 else
2943 addend = 0;
2944
2945 howto = bfd_coff_rtype_to_howto (input_bfd, input_section, rel, h,
2946 sym, &addend);
2947 if (howto == NULL)
2948 return FALSE;
2949
2950 /* If we are doing a relocatable link, then we can just ignore
2951 a PC relative reloc that is pcrel_offset. It will already
2952 have the correct value. If this is not a relocatable link,
2953 then we should ignore the symbol value. */
2954 if (howto->pc_relative && howto->pcrel_offset)
2955 {
2956 if (info->relocatable)
2957 continue;
2958 if (sym != NULL && sym->n_scnum != 0)
2959 addend += sym->n_value;
2960 }
2961
2962 val = 0;
2963
2964 if (h == NULL)
2965 {
2966 asection *sec;
2967
2968 if (symndx == -1)
2969 {
2970 sec = bfd_abs_section_ptr;
2971 val = 0;
2972 }
2973 else
2974 {
2975 sec = sections[symndx];
2976 val = (sec->output_section->vma
2977 + sec->output_offset
2978 + sym->n_value);
2979 if (! obj_pe (input_bfd))
2980 val -= sec->vma;
2981 }
2982 }
2983 else
2984 {
2985 if (h->root.type == bfd_link_hash_defined
2986 || h->root.type == bfd_link_hash_defweak)
2987 {
2988 /* Defined weak symbols are a GNU extension. */
2989 asection *sec;
2990
2991 sec = h->root.u.def.section;
2992 val = (h->root.u.def.value
2993 + sec->output_section->vma
2994 + sec->output_offset);
2995 }
2996
2997 else if (h->root.type == bfd_link_hash_undefweak)
2998 {
2999 if (h->symbol_class == C_NT_WEAK && h->numaux == 1)
3000 {
3001 /* See _Microsoft Portable Executable and Common Object
3002 File Format Specification_, section 5.5.3.
3003 Note that weak symbols without aux records are a GNU
3004 extension.
3005 FIXME: All weak externals are treated as having
3006 characteristic IMAGE_WEAK_EXTERN_SEARCH_NOLIBRARY (1).
3007 These behave as per SVR4 ABI: A library member
3008 will resolve a weak external only if a normal
3009 external causes the library member to be linked.
3010 See also linker.c: generic_link_check_archive_element. */
3011 asection *sec;
3012 struct coff_link_hash_entry *h2 =
3013 h->auxbfd->tdata.coff_obj_data->sym_hashes[
3014 h->aux->x_sym.x_tagndx.l];
3015
3016 if (!h2 || h2->root.type == bfd_link_hash_undefined)
3017 {
3018 sec = bfd_abs_section_ptr;
3019 val = 0;
3020 }
3021 else
3022 {
3023 sec = h2->root.u.def.section;
3024 val = h2->root.u.def.value
3025 + sec->output_section->vma + sec->output_offset;
3026 }
3027 }
3028 else
3029 /* This is a GNU extension. */
3030 val = 0;
3031 }
3032
3033 else if (! info->relocatable)
3034 {
3035 if (! ((*info->callbacks->undefined_symbol)
3036 (info, h->root.root.string, input_bfd, input_section,
3037 rel->r_vaddr - input_section->vma, TRUE)))
3038 return FALSE;
3039 }
3040 }
3041
3042 if (info->base_file)
3043 {
3044 /* Emit a reloc if the backend thinks it needs it. */
3045 if (sym && pe_data (output_bfd)->in_reloc_p (output_bfd, howto))
3046 {
3047 /* Relocation to a symbol in a section which isn't
3048 absolute. We output the address here to a file.
3049 This file is then read by dlltool when generating the
3050 reloc section. Note that the base file is not
3051 portable between systems. We write out a bfd_vma here,
3052 and dlltool reads in a bfd_vma. */
3053 bfd_vma addr = (rel->r_vaddr
3054 - input_section->vma
3055 + input_section->output_offset
3056 + input_section->output_section->vma);
3057 if (coff_data (output_bfd)->pe)
3058 addr -= pe_data(output_bfd)->pe_opthdr.ImageBase;
3059 if (fwrite (&addr, 1, sizeof (bfd_vma), (FILE *) info->base_file)
3060 != sizeof (bfd_vma))
3061 {
3062 bfd_set_error (bfd_error_system_call);
3063 return FALSE;
3064 }
3065 }
3066 }
3067
3068 rstat = _bfd_final_link_relocate (howto, input_bfd, input_section,
3069 contents,
3070 rel->r_vaddr - input_section->vma,
3071 val, addend);
3072
3073 switch (rstat)
3074 {
3075 default:
3076 abort ();
3077 case bfd_reloc_ok:
3078 break;
3079 case bfd_reloc_outofrange:
3080 (*_bfd_error_handler)
3081 (_("%B: bad reloc address 0x%lx in section `%A'"),
3082 input_bfd, input_section, (unsigned long) rel->r_vaddr);
3083 return FALSE;
3084 case bfd_reloc_overflow:
3085 {
3086 const char *name;
3087 char buf[SYMNMLEN + 1];
3088
3089 if (symndx == -1)
3090 name = "*ABS*";
3091 else if (h != NULL)
3092 name = NULL;
3093 else
3094 {
3095 name = _bfd_coff_internal_syment_name (input_bfd, sym, buf);
3096 if (name == NULL)
3097 return FALSE;
3098 }
3099
3100 if (! ((*info->callbacks->reloc_overflow)
3101 (info, (h ? &h->root : NULL), name, howto->name,
3102 (bfd_vma) 0, input_bfd, input_section,
3103 rel->r_vaddr - input_section->vma)))
3104 return FALSE;
3105 }
3106 }
3107 }
3108 return TRUE;
3109 }
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