Mention PR ld/12327 in ChangeLog entry.
[binutils.git] / bfd / cofflink.c
blob33de7fe3cc8aa97a99e35fa7d56bc061b41ea3eb
1 /* COFF specific linker code.
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
4 Written by Ian Lance Taylor, Cygnus Support.
6 This file is part of BFD, the Binary File Descriptor library.
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.
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.
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. */
23 /* This file contains the COFF backend linker code. */
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"
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);
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))
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))
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. */
52 #define N_TMASK n_tmask
53 #define N_BTSHFT n_btshft
54 #define N_BTMASK n_btmask
56 /* Create an entry in a COFF linker hash table. */
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)
63 struct coff_link_hash_entry *ret = (struct coff_link_hash_entry *) entry;
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;
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)
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;
88 return (struct bfd_hash_entry *) ret;
91 /* Initialize a COFF linker hash table. */
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)
101 memset (&table->stab_info, 0, sizeof (table->stab_info));
102 return _bfd_link_hash_table_init (&table->root, abfd, newfunc, entsize);
105 /* Create a COFF linker hash table. */
107 struct bfd_link_hash_table *
108 _bfd_coff_link_hash_table_create (bfd *abfd)
110 struct coff_link_hash_table *ret;
111 bfd_size_type amt = sizeof (struct coff_link_hash_table);
113 ret = (struct coff_link_hash_table *) bfd_malloc (amt);
114 if (ret == NULL)
115 return NULL;
117 if (! _bfd_coff_link_hash_table_init (ret, abfd,
118 _bfd_coff_link_hash_newfunc,
119 sizeof (struct coff_link_hash_entry)))
121 free (ret);
122 return (struct bfd_link_hash_table *) NULL;
124 return &ret->root;
127 /* Create an entry in a COFF debug merge hash table. */
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)
134 struct coff_debug_merge_hash_entry *ret =
135 (struct coff_debug_merge_hash_entry *) entry;
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;
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)
151 /* Set local fields. */
152 ret->types = NULL;
155 return (struct bfd_hash_entry *) ret;
158 /* Given a COFF BFD, add symbols to the global hash table as
159 appropriate. */
161 bfd_boolean
162 _bfd_coff_link_add_symbols (bfd *abfd, struct bfd_link_info *info)
164 switch (bfd_get_format (abfd))
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;
177 /* Add symbols from a COFF object file. */
179 static bfd_boolean
180 coff_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info)
182 if (! _bfd_coff_get_external_symbols (abfd))
183 return FALSE;
184 if (! coff_link_add_symbols (abfd, info))
185 return FALSE;
187 if (! info->keep_memory
188 && ! _bfd_coff_free_symbols (abfd))
189 return FALSE;
191 return TRUE;
194 /* Look through the symbols to see if this object file should be
195 included in the link. */
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)
203 bfd_size_type symesz;
204 bfd_byte *esym;
205 bfd_byte *esym_end;
207 *pneeded = FALSE;
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)
214 struct internal_syment sym;
215 enum coff_symbol_classification classification;
217 bfd_coff_swap_sym_in (abfd, esym, &sym);
219 classification = bfd_coff_classify_symbol (abfd, &sym);
220 if (classification == COFF_SYMBOL_GLOBAL
221 || classification == COFF_SYMBOL_COMMON)
223 const char *name;
224 char buf[SYMNMLEN + 1];
225 struct bfd_link_hash_entry *h;
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);
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);
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)
247 if (!(*info->callbacks
248 ->add_archive_element) (info, abfd, name, subsbfd))
249 return FALSE;
250 *pneeded = TRUE;
251 return TRUE;
255 esym += (sym.n_numaux + 1) * symesz;
258 /* We do not need this object file. */
259 return TRUE;
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. */
267 static bfd_boolean
268 coff_link_check_archive_element (bfd *abfd,
269 struct bfd_link_info *info,
270 bfd_boolean *pneeded)
272 bfd *oldbfd;
273 bfd_boolean needed;
275 if (!_bfd_coff_get_external_symbols (abfd))
276 return FALSE;
278 oldbfd = abfd;
279 if (!coff_link_check_ar_symbols (abfd, info, pneeded, &abfd))
280 return FALSE;
282 needed = *pneeded;
283 if (needed)
285 /* Potentially, the add_archive_element hook may have set a
286 substitute BFD for us. */
287 if (abfd != oldbfd)
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;
295 if (!coff_link_add_symbols (abfd, info))
296 return FALSE;
299 if (!info->keep_memory || !needed)
301 if (!_bfd_coff_free_symbols (abfd))
302 return FALSE;
304 return TRUE;
307 /* Add all the symbols from an object file to the hash table. */
309 static bfd_boolean
310 coff_link_add_symbols (bfd *abfd,
311 struct bfd_link_info *info)
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;
325 symcount = obj_raw_syment_count (abfd);
327 if (symcount == 0)
328 return TRUE; /* Nothing to do. */
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;
335 if (info->keep_memory)
336 default_copy = FALSE;
337 else
338 default_copy = TRUE;
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;
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)
354 struct internal_syment sym;
355 enum coff_symbol_classification classification;
356 bfd_boolean copy;
358 bfd_coff_swap_sym_in (abfd, esym, &sym);
360 classification = bfd_coff_classify_symbol (abfd, &sym);
361 if (classification != COFF_SYMBOL_LOCAL)
363 const char *name;
364 char buf[SYMNMLEN + 1];
365 flagword flags;
366 asection *section;
367 bfd_vma value;
368 bfd_boolean addit;
370 /* This symbol is externally visible. */
372 name = _bfd_coff_internal_syment_name (abfd, &sym, buf);
373 if (name == NULL)
374 goto error_return;
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;
383 value = sym.n_value;
385 switch (classification)
387 default:
388 abort ();
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;
397 case COFF_SYMBOL_UNDEFINED:
398 flags = 0;
399 section = bfd_und_section_ptr;
400 break;
402 case COFF_SYMBOL_COMMON:
403 flags = BSF_GLOBAL;
404 section = bfd_com_section_ptr;
405 break;
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;
413 if (IS_WEAK_EXTERNAL (abfd, sym))
414 flags = BSF_WEAK;
416 addit = TRUE;
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)
423 *sym_hash = coff_link_hash_lookup (coff_hash_table (info),
424 name, FALSE, copy, FALSE);
425 if (*sym_hash != NULL)
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);
435 addit = FALSE;
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.
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.
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)
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;
480 if (addit)
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;
489 if (obj_pe (abfd) && (flags & BSF_SECTION_SYM) != 0)
490 (*sym_hash)->coff_link_hash_flags |=
491 COFF_LINK_HASH_PE_SECTION_SYMBOL;
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);
505 if (bfd_get_flavour (info->output_bfd) == bfd_get_flavour (abfd))
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))
518 (*sym_hash)->symbol_class = sym.n_sclass;
519 if (sym.n_type != T_NULL)
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);
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;
543 (*sym_hash)->auxbfd = abfd;
544 if (sym.n_numaux != 0)
546 union internal_auxent *alloc;
547 unsigned int i;
548 bfd_byte *eaux;
549 union internal_auxent *iaux;
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;
569 if (classification == COFF_SYMBOL_PE_SECTION
570 && (*sym_hash)->numaux != 0)
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.
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;
583 /* FIXME: We could test whether the section sizes
584 matches the size in the aux entry, but apparently
585 that sometimes fails unexpectedly. */
589 esym += (sym.n_numaux + 1) * symesz;
590 sym_hash += sym.n_numaux + 1;
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))
600 asection *stabstr;
602 stabstr = bfd_get_section_by_name (abfd, ".stabstr");
604 if (stabstr != NULL)
606 bfd_size_type string_offset = 0;
607 asection *stab;
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]))))
614 struct coff_link_hash_table *table;
615 struct coff_section_tdata *secdata
616 = coff_section_data (abfd, stab);
618 if (secdata == NULL)
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);
627 table = coff_hash_table (info);
629 if (! _bfd_link_section_stabs (abfd, &table->stab_info,
630 stab, stabstr,
631 &secdata->stab_info,
632 &string_offset))
633 goto error_return;
638 obj_coff_keep_syms (abfd) = keep_syms;
640 return TRUE;
642 error_return:
643 obj_coff_keep_syms (abfd) = keep_syms;
644 return FALSE;
647 /* Do the final link step. */
649 bfd_boolean
650 _bfd_coff_final_link (bfd *abfd,
651 struct bfd_link_info *info)
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;
673 symesz = bfd_coff_symesz (abfd);
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;
692 coff_data (abfd)->link_info = info;
694 finfo.strtab = _bfd_stringtab_init ();
695 if (finfo.strtab == NULL)
696 goto error_return;
698 if (! coff_debug_merge_hash_table_init (&finfo.debug_merge))
699 goto error_return;
700 debug_merge_allocated = TRUE;
702 /* Compute the file positions for all the sections. */
703 if (! abfd->output_has_begun)
705 if (! bfd_coff_compute_section_file_positions (abfd))
706 goto error_return;
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;
717 long_section_names = FALSE;
718 for (o = abfd->sections; o != NULL; o = o->next)
720 o->reloc_count = 0;
721 o->lineno_count = 0;
722 for (p = o->map_head.link_order; p != NULL; p = p->next)
724 if (p->type == bfd_indirect_link_order)
726 asection *sec;
728 sec = p->u.indirect.section;
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;
736 if (info->strip == strip_none
737 || info->strip == strip_some)
738 o->lineno_count += sec->lineno_count;
740 if (info->relocatable)
741 o->reloc_count += sec->reloc_count;
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;
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;
757 if (o->reloc_count == 0)
758 o->rel_filepos = 0;
759 else
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;
770 if (bfd_coff_long_section_names (abfd)
771 && strlen (o->name) > SCNNMLEN)
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;
785 /* If doing a relocatable link, allocate space for the pointers we
786 need to keep. */
787 if (info->relocatable)
789 unsigned int i;
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++)
800 finfo.section_info[i].relocs = NULL;
801 finfo.section_info[i].rel_hashes = NULL;
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)
812 if (o->lineno_count == 0)
813 o->line_filepos = 0;
814 else
816 o->line_filepos = line_filepos;
817 line_filepos += o->lineno_count * linesz;
820 if (o->reloc_count != 0)
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.
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;
848 if (o->reloc_count > max_output_reloc_count)
849 max_output_reloc_count = o->reloc_count;
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;
858 obj_sym_filepos (abfd) = line_filepos;
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)
866 size_t sz;
868 sub->output_has_begun = FALSE;
869 sz = obj_raw_syment_count (sub);
870 if (sz > max_sym_count)
871 max_sym_count = sz;
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)
889 amt = max_reloc_count * sizeof (struct internal_reloc);
890 finfo.internal_relocs = (struct internal_reloc *) bfd_malloc (amt);
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;
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;
911 if (coff_backend_info (abfd)->_bfd_coff_start_final_link)
913 if (! bfd_coff_start_final_link (abfd, info))
914 goto error_return;
917 for (o = abfd->sections; o != NULL; o = o->next)
919 for (p = o->map_head.link_order; p != NULL; p = p->next)
921 if (p->type == bfd_indirect_link_order
922 && bfd_family_coff (p->u.indirect.section->owner))
924 sub = p->u.indirect.section->owner;
925 if (! bfd_coff_link_output_has_begun (sub, & finfo))
927 if (! _bfd_coff_link_input_bfd (&finfo, sub))
928 goto error_return;
929 sub->output_has_begun = TRUE;
932 else if (p->type == bfd_section_reloc_link_order
933 || p->type == bfd_symbol_reloc_link_order)
935 if (! _bfd_coff_reloc_link_order (abfd, &finfo, o, p))
936 goto error_return;
938 else
940 if (! _bfd_default_link_order (abfd, info, o, p))
941 goto error_return;
946 if (! bfd_coff_final_link_postscript (abfd, & finfo))
947 goto error_return;
949 /* Free up the buffers used by _bfd_coff_link_input_bfd. */
951 coff_debug_merge_hash_table_free (&finfo.debug_merge);
952 debug_merge_allocated = FALSE;
954 if (finfo.internal_syms != NULL)
956 free (finfo.internal_syms);
957 finfo.internal_syms = NULL;
959 if (finfo.sec_ptrs != NULL)
961 free (finfo.sec_ptrs);
962 finfo.sec_ptrs = NULL;
964 if (finfo.sym_indices != NULL)
966 free (finfo.sym_indices);
967 finfo.sym_indices = NULL;
969 if (finfo.linenos != NULL)
971 free (finfo.linenos);
972 finfo.linenos = NULL;
974 if (finfo.contents != NULL)
976 free (finfo.contents);
977 finfo.contents = NULL;
979 if (finfo.external_relocs != NULL)
981 free (finfo.external_relocs);
982 finfo.external_relocs = NULL;
984 if (finfo.internal_relocs != NULL)
986 free (finfo.internal_relocs);
987 finfo.internal_relocs = NULL;
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))
996 file_ptr pos;
998 finfo.last_file.n_value = obj_raw_syment_count (abfd);
999 bfd_coff_swap_sym_out (abfd, &finfo.last_file,
1000 finfo.outsyms);
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;
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)
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;
1020 /* Write out the global symbols. */
1021 finfo.failed = FALSE;
1022 coff_link_hash_traverse (coff_hash_table (info),
1023 _bfd_coff_write_global_sym, &finfo);
1024 if (finfo.failed)
1025 goto error_return;
1027 /* The outsyms buffer is used by _bfd_coff_write_global_sym. */
1028 if (finfo.outsyms != NULL)
1030 free (finfo.outsyms);
1031 finfo.outsyms = NULL;
1034 if (info->relocatable && max_output_reloc_count > 0)
1036 /* Now that we have written out all the global symbols, we know
1037 the symbol indices to use for relocs against them, and we can
1038 finally write out the relocs. */
1039 amt = max_output_reloc_count * relsz;
1040 external_relocs = (bfd_byte *) bfd_malloc (amt);
1041 if (external_relocs == NULL)
1042 goto error_return;
1044 for (o = abfd->sections; o != NULL; o = o->next)
1046 struct internal_reloc *irel;
1047 struct internal_reloc *irelend;
1048 struct coff_link_hash_entry **rel_hash;
1049 bfd_byte *erel;
1051 if (o->reloc_count == 0)
1052 continue;
1054 irel = finfo.section_info[o->target_index].relocs;
1055 irelend = irel + o->reloc_count;
1056 rel_hash = finfo.section_info[o->target_index].rel_hashes;
1057 erel = external_relocs;
1058 for (; irel < irelend; irel++, rel_hash++, erel += relsz)
1060 if (*rel_hash != NULL)
1062 BFD_ASSERT ((*rel_hash)->indx >= 0);
1063 irel->r_symndx = (*rel_hash)->indx;
1065 bfd_coff_swap_reloc_out (abfd, irel, erel);
1068 if (bfd_seek (abfd, o->rel_filepos, SEEK_SET) != 0)
1069 goto error_return;
1070 if (obj_pe (abfd) && o->reloc_count >= 0xffff)
1072 /* In PE COFF, write the count of relocs as the first
1073 reloc. The header overflow bit will be set
1074 elsewhere. */
1075 struct internal_reloc incount;
1076 bfd_byte *excount = (bfd_byte *)bfd_malloc (relsz);
1078 memset (&incount, 0, sizeof (incount));
1079 incount.r_vaddr = o->reloc_count + 1;
1080 bfd_coff_swap_reloc_out (abfd, (PTR) &incount, (PTR) excount);
1081 if (bfd_bwrite (excount, relsz, abfd) != relsz)
1082 /* We'll leak, but it's an error anyway. */
1083 goto error_return;
1084 free (excount);
1086 if (bfd_bwrite (external_relocs,
1087 (bfd_size_type) relsz * o->reloc_count, abfd)
1088 != (bfd_size_type) relsz * o->reloc_count)
1089 goto error_return;
1092 free (external_relocs);
1093 external_relocs = NULL;
1096 /* Free up the section information. */
1097 if (finfo.section_info != NULL)
1099 unsigned int i;
1101 for (i = 0; i < abfd->section_count; i++)
1103 if (finfo.section_info[i].relocs != NULL)
1104 free (finfo.section_info[i].relocs);
1105 if (finfo.section_info[i].rel_hashes != NULL)
1106 free (finfo.section_info[i].rel_hashes);
1108 free (finfo.section_info);
1109 finfo.section_info = NULL;
1112 /* If we have optimized stabs strings, output them. */
1113 if (coff_hash_table (info)->stab_info.stabstr != NULL)
1115 if (! _bfd_write_stab_strings (abfd, &coff_hash_table (info)->stab_info))
1116 return FALSE;
1119 /* Write out the string table. */
1120 if (obj_raw_syment_count (abfd) != 0 || long_section_names)
1122 file_ptr pos;
1124 pos = obj_sym_filepos (abfd) + obj_raw_syment_count (abfd) * symesz;
1125 if (bfd_seek (abfd, pos, SEEK_SET) != 0)
1126 return FALSE;
1128 #if STRING_SIZE_SIZE == 4
1129 H_PUT_32 (abfd,
1130 _bfd_stringtab_size (finfo.strtab) + STRING_SIZE_SIZE,
1131 strbuf);
1132 #else
1133 #error Change H_PUT_32 above
1134 #endif
1136 if (bfd_bwrite (strbuf, (bfd_size_type) STRING_SIZE_SIZE, abfd)
1137 != STRING_SIZE_SIZE)
1138 return FALSE;
1140 if (! _bfd_stringtab_emit (abfd, finfo.strtab))
1141 return FALSE;
1143 obj_coff_strings_written (abfd) = TRUE;
1146 _bfd_stringtab_free (finfo.strtab);
1148 /* Setting bfd_get_symcount to 0 will cause write_object_contents to
1149 not try to write out the symbols. */
1150 bfd_get_symcount (abfd) = 0;
1152 return TRUE;
1154 error_return:
1155 if (debug_merge_allocated)
1156 coff_debug_merge_hash_table_free (&finfo.debug_merge);
1157 if (finfo.strtab != NULL)
1158 _bfd_stringtab_free (finfo.strtab);
1159 if (finfo.section_info != NULL)
1161 unsigned int i;
1163 for (i = 0; i < abfd->section_count; i++)
1165 if (finfo.section_info[i].relocs != NULL)
1166 free (finfo.section_info[i].relocs);
1167 if (finfo.section_info[i].rel_hashes != NULL)
1168 free (finfo.section_info[i].rel_hashes);
1170 free (finfo.section_info);
1172 if (finfo.internal_syms != NULL)
1173 free (finfo.internal_syms);
1174 if (finfo.sec_ptrs != NULL)
1175 free (finfo.sec_ptrs);
1176 if (finfo.sym_indices != NULL)
1177 free (finfo.sym_indices);
1178 if (finfo.outsyms != NULL)
1179 free (finfo.outsyms);
1180 if (finfo.linenos != NULL)
1181 free (finfo.linenos);
1182 if (finfo.contents != NULL)
1183 free (finfo.contents);
1184 if (finfo.external_relocs != NULL)
1185 free (finfo.external_relocs);
1186 if (finfo.internal_relocs != NULL)
1187 free (finfo.internal_relocs);
1188 if (external_relocs != NULL)
1189 free (external_relocs);
1190 return FALSE;
1193 /* Parse out a -heap <reserved>,<commit> line. */
1195 static char *
1196 dores_com (char *ptr, bfd *output_bfd, int heap)
1198 if (coff_data(output_bfd)->pe)
1200 int val = strtoul (ptr, &ptr, 0);
1202 if (heap)
1203 pe_data(output_bfd)->pe_opthdr.SizeOfHeapReserve = val;
1204 else
1205 pe_data(output_bfd)->pe_opthdr.SizeOfStackReserve = val;
1207 if (ptr[0] == ',')
1209 val = strtoul (ptr+1, &ptr, 0);
1210 if (heap)
1211 pe_data(output_bfd)->pe_opthdr.SizeOfHeapCommit = val;
1212 else
1213 pe_data(output_bfd)->pe_opthdr.SizeOfStackCommit = val;
1216 return ptr;
1219 static char *
1220 get_name (char *ptr, char **dst)
1222 while (*ptr == ' ')
1223 ptr++;
1224 *dst = ptr;
1225 while (*ptr && *ptr != ' ')
1226 ptr++;
1227 *ptr = 0;
1228 return ptr+1;
1231 /* Process any magic embedded commands in a section called .drectve. */
1233 static int
1234 process_embedded_commands (bfd *output_bfd,
1235 struct bfd_link_info *info ATTRIBUTE_UNUSED,
1236 bfd *abfd)
1238 asection *sec = bfd_get_section_by_name (abfd, ".drectve");
1239 char *s;
1240 char *e;
1241 bfd_byte *copy;
1243 if (!sec)
1244 return 1;
1246 if (!bfd_malloc_and_get_section (abfd, sec, &copy))
1248 if (copy != NULL)
1249 free (copy);
1250 return 0;
1252 e = (char *) copy + sec->size;
1254 for (s = (char *) copy; s < e ; )
1256 if (s[0] != '-')
1258 s++;
1259 continue;
1261 if (CONST_STRNEQ (s, "-attr"))
1263 char *name;
1264 char *attribs;
1265 asection *asec;
1266 int loop = 1;
1267 int had_write = 0;
1268 int had_exec= 0;
1270 s += 5;
1271 s = get_name (s, &name);
1272 s = get_name (s, &attribs);
1274 while (loop)
1276 switch (*attribs++)
1278 case 'W':
1279 had_write = 1;
1280 break;
1281 case 'R':
1282 break;
1283 case 'S':
1284 break;
1285 case 'X':
1286 had_exec = 1;
1287 break;
1288 default:
1289 loop = 0;
1292 asec = bfd_get_section_by_name (abfd, name);
1293 if (asec)
1295 if (had_exec)
1296 asec->flags |= SEC_CODE;
1297 if (!had_write)
1298 asec->flags |= SEC_READONLY;
1301 else if (CONST_STRNEQ (s, "-heap"))
1302 s = dores_com (s + 5, output_bfd, 1);
1304 else if (CONST_STRNEQ (s, "-stack"))
1305 s = dores_com (s + 6, output_bfd, 0);
1307 /* GNU extension for aligned commons. */
1308 else if (CONST_STRNEQ (s, "-aligncomm:"))
1310 /* Common symbols must be aligned on reading, as it
1311 is too late to do anything here, after they have
1312 already been allocated, so just skip the directive. */
1313 s += 11;
1316 else
1317 s++;
1319 free (copy);
1320 return 1;
1323 /* Place a marker against all symbols which are used by relocations.
1324 This marker can be picked up by the 'do we skip this symbol ?'
1325 loop in _bfd_coff_link_input_bfd() and used to prevent skipping
1326 that symbol. */
1328 static void
1329 mark_relocs (struct coff_final_link_info *finfo, bfd *input_bfd)
1331 asection * a;
1333 if ((bfd_get_file_flags (input_bfd) & HAS_SYMS) == 0)
1334 return;
1336 for (a = input_bfd->sections; a != (asection *) NULL; a = a->next)
1338 struct internal_reloc * internal_relocs;
1339 struct internal_reloc * irel;
1340 struct internal_reloc * irelend;
1342 if ((a->flags & SEC_RELOC) == 0 || a->reloc_count < 1)
1343 continue;
1344 /* Don't mark relocs in excluded sections. */
1345 if (a->output_section == bfd_abs_section_ptr)
1346 continue;
1348 /* Read in the relocs. */
1349 internal_relocs = _bfd_coff_read_internal_relocs
1350 (input_bfd, a, FALSE,
1351 finfo->external_relocs,
1352 finfo->info->relocatable,
1353 (finfo->info->relocatable
1354 ? (finfo->section_info[ a->output_section->target_index ].relocs + a->output_section->reloc_count)
1355 : finfo->internal_relocs)
1358 if (internal_relocs == NULL)
1359 continue;
1361 irel = internal_relocs;
1362 irelend = irel + a->reloc_count;
1364 /* Place a mark in the sym_indices array (whose entries have
1365 been initialised to 0) for all of the symbols that are used
1366 in the relocation table. This will then be picked up in the
1367 skip/don't-skip pass. */
1368 for (; irel < irelend; irel++)
1369 finfo->sym_indices[ irel->r_symndx ] = -1;
1373 /* Link an input file into the linker output file. This function
1374 handles all the sections and relocations of the input file at once. */
1376 bfd_boolean
1377 _bfd_coff_link_input_bfd (struct coff_final_link_info *finfo, bfd *input_bfd)
1379 unsigned int n_tmask = coff_data (input_bfd)->local_n_tmask;
1380 unsigned int n_btshft = coff_data (input_bfd)->local_n_btshft;
1381 bfd_boolean (*adjust_symndx)
1382 (bfd *, struct bfd_link_info *, bfd *, asection *,
1383 struct internal_reloc *, bfd_boolean *);
1384 bfd *output_bfd;
1385 const char *strings;
1386 bfd_size_type syment_base;
1387 bfd_boolean copy, hash;
1388 bfd_size_type isymesz;
1389 bfd_size_type osymesz;
1390 bfd_size_type linesz;
1391 bfd_byte *esym;
1392 bfd_byte *esym_end;
1393 struct internal_syment *isymp;
1394 asection **secpp;
1395 long *indexp;
1396 unsigned long output_index;
1397 bfd_byte *outsym;
1398 struct coff_link_hash_entry **sym_hash;
1399 asection *o;
1401 /* Move all the symbols to the output file. */
1403 output_bfd = finfo->output_bfd;
1404 strings = NULL;
1405 syment_base = obj_raw_syment_count (output_bfd);
1406 isymesz = bfd_coff_symesz (input_bfd);
1407 osymesz = bfd_coff_symesz (output_bfd);
1408 linesz = bfd_coff_linesz (input_bfd);
1409 BFD_ASSERT (linesz == bfd_coff_linesz (output_bfd));
1411 copy = FALSE;
1412 if (! finfo->info->keep_memory)
1413 copy = TRUE;
1414 hash = TRUE;
1415 if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
1416 hash = FALSE;
1418 if (! _bfd_coff_get_external_symbols (input_bfd))
1419 return FALSE;
1421 esym = (bfd_byte *) obj_coff_external_syms (input_bfd);
1422 esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz;
1423 isymp = finfo->internal_syms;
1424 secpp = finfo->sec_ptrs;
1425 indexp = finfo->sym_indices;
1426 output_index = syment_base;
1427 outsym = finfo->outsyms;
1429 if (coff_data (output_bfd)->pe
1430 && ! process_embedded_commands (output_bfd, finfo->info, input_bfd))
1431 return FALSE;
1433 /* If we are going to perform relocations and also strip/discard some
1434 symbols then we must make sure that we do not strip/discard those
1435 symbols that are going to be involved in the relocations. */
1436 if (( finfo->info->strip != strip_none
1437 || finfo->info->discard != discard_none)
1438 && finfo->info->relocatable)
1440 /* Mark the symbol array as 'not-used'. */
1441 memset (indexp, 0, obj_raw_syment_count (input_bfd) * sizeof * indexp);
1443 mark_relocs (finfo, input_bfd);
1446 while (esym < esym_end)
1448 struct internal_syment isym;
1449 enum coff_symbol_classification classification;
1450 bfd_boolean skip;
1451 bfd_boolean global;
1452 bfd_boolean dont_skip_symbol;
1453 int add;
1455 bfd_coff_swap_sym_in (input_bfd, esym, isymp);
1457 /* Make a copy of *isymp so that the relocate_section function
1458 always sees the original values. This is more reliable than
1459 always recomputing the symbol value even if we are stripping
1460 the symbol. */
1461 isym = *isymp;
1463 classification = bfd_coff_classify_symbol (input_bfd, &isym);
1464 switch (classification)
1466 default:
1467 abort ();
1468 case COFF_SYMBOL_GLOBAL:
1469 case COFF_SYMBOL_PE_SECTION:
1470 case COFF_SYMBOL_LOCAL:
1471 *secpp = coff_section_from_bfd_index (input_bfd, isym.n_scnum);
1472 break;
1473 case COFF_SYMBOL_COMMON:
1474 *secpp = bfd_com_section_ptr;
1475 break;
1476 case COFF_SYMBOL_UNDEFINED:
1477 *secpp = bfd_und_section_ptr;
1478 break;
1481 /* Extract the flag indicating if this symbol is used by a
1482 relocation. */
1483 if ((finfo->info->strip != strip_none
1484 || finfo->info->discard != discard_none)
1485 && finfo->info->relocatable)
1486 dont_skip_symbol = *indexp;
1487 else
1488 dont_skip_symbol = FALSE;
1490 *indexp = -1;
1492 skip = FALSE;
1493 global = FALSE;
1494 add = 1 + isym.n_numaux;
1496 /* If we are stripping all symbols, we want to skip this one. */
1497 if (finfo->info->strip == strip_all && ! dont_skip_symbol)
1498 skip = TRUE;
1500 if (! skip)
1502 switch (classification)
1504 default:
1505 abort ();
1506 case COFF_SYMBOL_GLOBAL:
1507 case COFF_SYMBOL_COMMON:
1508 case COFF_SYMBOL_PE_SECTION:
1509 /* This is a global symbol. Global symbols come at the
1510 end of the symbol table, so skip them for now.
1511 Locally defined function symbols, however, are an
1512 exception, and are not moved to the end. */
1513 global = TRUE;
1514 if (! ISFCN (isym.n_type))
1515 skip = TRUE;
1516 break;
1518 case COFF_SYMBOL_UNDEFINED:
1519 /* Undefined symbols are left for the end. */
1520 global = TRUE;
1521 skip = TRUE;
1522 break;
1524 case COFF_SYMBOL_LOCAL:
1525 /* This is a local symbol. Skip it if we are discarding
1526 local symbols. */
1527 if (finfo->info->discard == discard_all && ! dont_skip_symbol)
1528 skip = TRUE;
1529 break;
1533 #ifndef COFF_WITH_PE
1534 /* Skip section symbols for sections which are not going to be
1535 emitted. */
1536 if (!skip
1537 && !dont_skip_symbol
1538 && isym.n_sclass == C_STAT
1539 && isym.n_type == T_NULL
1540 && isym.n_numaux > 0
1541 && ((*secpp)->output_section == bfd_abs_section_ptr
1542 || bfd_section_removed_from_list (output_bfd,
1543 (*secpp)->output_section)))
1544 skip = TRUE;
1545 #endif
1547 /* If we stripping debugging symbols, and this is a debugging
1548 symbol, then skip it. FIXME: gas sets the section to N_ABS
1549 for some types of debugging symbols; I don't know if this is
1550 a bug or not. In any case, we handle it here. */
1551 if (! skip
1552 && finfo->info->strip == strip_debugger
1553 && ! dont_skip_symbol
1554 && (isym.n_scnum == N_DEBUG
1555 || (isym.n_scnum == N_ABS
1556 && (isym.n_sclass == C_AUTO
1557 || isym.n_sclass == C_REG
1558 || isym.n_sclass == C_MOS
1559 || isym.n_sclass == C_MOE
1560 || isym.n_sclass == C_MOU
1561 || isym.n_sclass == C_ARG
1562 || isym.n_sclass == C_REGPARM
1563 || isym.n_sclass == C_FIELD
1564 || isym.n_sclass == C_EOS))))
1565 skip = TRUE;
1567 /* If some symbols are stripped based on the name, work out the
1568 name and decide whether to skip this symbol. */
1569 if (! skip
1570 && (finfo->info->strip == strip_some
1571 || finfo->info->discard == discard_l))
1573 const char *name;
1574 char buf[SYMNMLEN + 1];
1576 name = _bfd_coff_internal_syment_name (input_bfd, &isym, buf);
1577 if (name == NULL)
1578 return FALSE;
1580 if (! dont_skip_symbol
1581 && ((finfo->info->strip == strip_some
1582 && (bfd_hash_lookup (finfo->info->keep_hash, name, FALSE,
1583 FALSE) == NULL))
1584 || (! global
1585 && finfo->info->discard == discard_l
1586 && bfd_is_local_label_name (input_bfd, name))))
1587 skip = TRUE;
1590 /* If this is an enum, struct, or union tag, see if we have
1591 already output an identical type. */
1592 if (! skip
1593 && (finfo->output_bfd->flags & BFD_TRADITIONAL_FORMAT) == 0
1594 && (isym.n_sclass == C_ENTAG
1595 || isym.n_sclass == C_STRTAG
1596 || isym.n_sclass == C_UNTAG)
1597 && isym.n_numaux == 1)
1599 const char *name;
1600 char buf[SYMNMLEN + 1];
1601 struct coff_debug_merge_hash_entry *mh;
1602 struct coff_debug_merge_type *mt;
1603 union internal_auxent aux;
1604 struct coff_debug_merge_element **epp;
1605 bfd_byte *esl, *eslend;
1606 struct internal_syment *islp;
1607 bfd_size_type amt;
1609 name = _bfd_coff_internal_syment_name (input_bfd, &isym, buf);
1610 if (name == NULL)
1611 return FALSE;
1613 /* Ignore fake names invented by compiler; treat them all as
1614 the same name. */
1615 if (*name == '~' || *name == '.' || *name == '$'
1616 || (*name == bfd_get_symbol_leading_char (input_bfd)
1617 && (name[1] == '~' || name[1] == '.' || name[1] == '$')))
1618 name = "";
1620 mh = coff_debug_merge_hash_lookup (&finfo->debug_merge, name,
1621 TRUE, TRUE);
1622 if (mh == NULL)
1623 return FALSE;
1625 /* Allocate memory to hold type information. If this turns
1626 out to be a duplicate, we pass this address to
1627 bfd_release. */
1628 amt = sizeof (struct coff_debug_merge_type);
1629 mt = (struct coff_debug_merge_type *) bfd_alloc (input_bfd, amt);
1630 if (mt == NULL)
1631 return FALSE;
1632 mt->type_class = isym.n_sclass;
1634 /* Pick up the aux entry, which points to the end of the tag
1635 entries. */
1636 bfd_coff_swap_aux_in (input_bfd, (esym + isymesz),
1637 isym.n_type, isym.n_sclass, 0, isym.n_numaux,
1638 &aux);
1640 /* Gather the elements. */
1641 epp = &mt->elements;
1642 mt->elements = NULL;
1643 islp = isymp + 2;
1644 esl = esym + 2 * isymesz;
1645 eslend = ((bfd_byte *) obj_coff_external_syms (input_bfd)
1646 + aux.x_sym.x_fcnary.x_fcn.x_endndx.l * isymesz);
1647 while (esl < eslend)
1649 const char *elename;
1650 char elebuf[SYMNMLEN + 1];
1651 char *name_copy;
1653 bfd_coff_swap_sym_in (input_bfd, esl, islp);
1655 amt = sizeof (struct coff_debug_merge_element);
1656 *epp = (struct coff_debug_merge_element *)
1657 bfd_alloc (input_bfd, amt);
1658 if (*epp == NULL)
1659 return FALSE;
1661 elename = _bfd_coff_internal_syment_name (input_bfd, islp,
1662 elebuf);
1663 if (elename == NULL)
1664 return FALSE;
1666 amt = strlen (elename) + 1;
1667 name_copy = (char *) bfd_alloc (input_bfd, amt);
1668 if (name_copy == NULL)
1669 return FALSE;
1670 strcpy (name_copy, elename);
1672 (*epp)->name = name_copy;
1673 (*epp)->type = islp->n_type;
1674 (*epp)->tagndx = 0;
1675 if (islp->n_numaux >= 1
1676 && islp->n_type != T_NULL
1677 && islp->n_sclass != C_EOS)
1679 union internal_auxent eleaux;
1680 long indx;
1682 bfd_coff_swap_aux_in (input_bfd, (esl + isymesz),
1683 islp->n_type, islp->n_sclass, 0,
1684 islp->n_numaux, &eleaux);
1685 indx = eleaux.x_sym.x_tagndx.l;
1687 /* FIXME: If this tagndx entry refers to a symbol
1688 defined later in this file, we just ignore it.
1689 Handling this correctly would be tedious, and may
1690 not be required. */
1691 if (indx > 0
1692 && (indx
1693 < ((esym -
1694 (bfd_byte *) obj_coff_external_syms (input_bfd))
1695 / (long) isymesz)))
1697 (*epp)->tagndx = finfo->sym_indices[indx];
1698 if ((*epp)->tagndx < 0)
1699 (*epp)->tagndx = 0;
1702 epp = &(*epp)->next;
1703 *epp = NULL;
1705 esl += (islp->n_numaux + 1) * isymesz;
1706 islp += islp->n_numaux + 1;
1709 /* See if we already have a definition which matches this
1710 type. We always output the type if it has no elements,
1711 for simplicity. */
1712 if (mt->elements == NULL)
1713 bfd_release (input_bfd, mt);
1714 else
1716 struct coff_debug_merge_type *mtl;
1718 for (mtl = mh->types; mtl != NULL; mtl = mtl->next)
1720 struct coff_debug_merge_element *me, *mel;
1722 if (mtl->type_class != mt->type_class)
1723 continue;
1725 for (me = mt->elements, mel = mtl->elements;
1726 me != NULL && mel != NULL;
1727 me = me->next, mel = mel->next)
1729 if (strcmp (me->name, mel->name) != 0
1730 || me->type != mel->type
1731 || me->tagndx != mel->tagndx)
1732 break;
1735 if (me == NULL && mel == NULL)
1736 break;
1739 if (mtl == NULL || (bfd_size_type) mtl->indx >= syment_base)
1741 /* This is the first definition of this type. */
1742 mt->indx = output_index;
1743 mt->next = mh->types;
1744 mh->types = mt;
1746 else
1748 /* This is a redefinition which can be merged. */
1749 bfd_release (input_bfd, mt);
1750 *indexp = mtl->indx;
1751 add = (eslend - esym) / isymesz;
1752 skip = TRUE;
1757 /* We now know whether we are to skip this symbol or not. */
1758 if (! skip)
1760 /* Adjust the symbol in order to output it. */
1762 if (isym._n._n_n._n_zeroes == 0
1763 && isym._n._n_n._n_offset != 0)
1765 const char *name;
1766 bfd_size_type indx;
1768 /* This symbol has a long name. Enter it in the string
1769 table we are building. Note that we do not check
1770 bfd_coff_symname_in_debug. That is only true for
1771 XCOFF, and XCOFF requires different linking code
1772 anyhow. */
1773 name = _bfd_coff_internal_syment_name (input_bfd, &isym, NULL);
1774 if (name == NULL)
1775 return FALSE;
1776 indx = _bfd_stringtab_add (finfo->strtab, name, hash, copy);
1777 if (indx == (bfd_size_type) -1)
1778 return FALSE;
1779 isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx;
1782 switch (isym.n_sclass)
1784 case C_AUTO:
1785 case C_MOS:
1786 case C_EOS:
1787 case C_MOE:
1788 case C_MOU:
1789 case C_UNTAG:
1790 case C_STRTAG:
1791 case C_ENTAG:
1792 case C_TPDEF:
1793 case C_ARG:
1794 case C_USTATIC:
1795 case C_REG:
1796 case C_REGPARM:
1797 case C_FIELD:
1798 /* The symbol value should not be modified. */
1799 break;
1801 case C_FCN:
1802 if (obj_pe (input_bfd)
1803 && strcmp (isym.n_name, ".bf") != 0
1804 && isym.n_scnum > 0)
1806 /* For PE, .lf and .ef get their value left alone,
1807 while .bf gets relocated. However, they all have
1808 "real" section numbers, and need to be moved into
1809 the new section. */
1810 isym.n_scnum = (*secpp)->output_section->target_index;
1811 break;
1813 /* Fall through. */
1814 default:
1815 case C_LABEL: /* Not completely sure about these 2 */
1816 case C_EXTDEF:
1817 case C_BLOCK:
1818 case C_EFCN:
1819 case C_NULL:
1820 case C_EXT:
1821 case C_STAT:
1822 case C_SECTION:
1823 case C_NT_WEAK:
1824 /* Compute new symbol location. */
1825 if (isym.n_scnum > 0)
1827 isym.n_scnum = (*secpp)->output_section->target_index;
1828 isym.n_value += (*secpp)->output_offset;
1829 if (! obj_pe (input_bfd))
1830 isym.n_value -= (*secpp)->vma;
1831 if (! obj_pe (finfo->output_bfd))
1832 isym.n_value += (*secpp)->output_section->vma;
1834 break;
1836 case C_FILE:
1837 /* The value of a C_FILE symbol is the symbol index of
1838 the next C_FILE symbol. The value of the last C_FILE
1839 symbol is the symbol index to the first external
1840 symbol (actually, coff_renumber_symbols does not get
1841 this right--it just sets the value of the last C_FILE
1842 symbol to zero--and nobody has ever complained about
1843 it). We try to get this right, below, just before we
1844 write the symbols out, but in the general case we may
1845 have to write the symbol out twice. */
1846 if (finfo->last_file_index != -1
1847 && finfo->last_file.n_value != (bfd_vma) output_index)
1849 /* We must correct the value of the last C_FILE
1850 entry. */
1851 finfo->last_file.n_value = output_index;
1852 if ((bfd_size_type) finfo->last_file_index >= syment_base)
1854 /* The last C_FILE symbol is in this input file. */
1855 bfd_coff_swap_sym_out (output_bfd,
1856 &finfo->last_file,
1857 (finfo->outsyms
1858 + ((finfo->last_file_index
1859 - syment_base)
1860 * osymesz)));
1862 else
1864 file_ptr pos;
1866 /* We have already written out the last C_FILE
1867 symbol. We need to write it out again. We
1868 borrow *outsym temporarily. */
1869 bfd_coff_swap_sym_out (output_bfd,
1870 &finfo->last_file, outsym);
1871 pos = obj_sym_filepos (output_bfd);
1872 pos += finfo->last_file_index * osymesz;
1873 if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
1874 || bfd_bwrite (outsym, osymesz, output_bfd) != osymesz)
1875 return FALSE;
1879 finfo->last_file_index = output_index;
1880 finfo->last_file = isym;
1881 break;
1884 /* If doing task linking, convert normal global function symbols to
1885 static functions. */
1886 if (finfo->info->task_link && IS_EXTERNAL (input_bfd, isym))
1887 isym.n_sclass = C_STAT;
1889 /* Output the symbol. */
1890 bfd_coff_swap_sym_out (output_bfd, &isym, outsym);
1892 *indexp = output_index;
1894 if (global)
1896 long indx;
1897 struct coff_link_hash_entry *h;
1899 indx = ((esym - (bfd_byte *) obj_coff_external_syms (input_bfd))
1900 / isymesz);
1901 h = obj_coff_sym_hashes (input_bfd)[indx];
1902 if (h == NULL)
1904 /* This can happen if there were errors earlier in
1905 the link. */
1906 bfd_set_error (bfd_error_bad_value);
1907 return FALSE;
1909 h->indx = output_index;
1912 output_index += add;
1913 outsym += add * osymesz;
1916 esym += add * isymesz;
1917 isymp += add;
1918 ++secpp;
1919 ++indexp;
1920 for (--add; add > 0; --add)
1922 *secpp++ = NULL;
1923 *indexp++ = -1;
1927 /* Fix up the aux entries. This must be done in a separate pass,
1928 because we don't know the correct symbol indices until we have
1929 already decided which symbols we are going to keep. */
1930 esym = (bfd_byte *) obj_coff_external_syms (input_bfd);
1931 esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz;
1932 isymp = finfo->internal_syms;
1933 indexp = finfo->sym_indices;
1934 sym_hash = obj_coff_sym_hashes (input_bfd);
1935 outsym = finfo->outsyms;
1937 while (esym < esym_end)
1939 int add;
1941 add = 1 + isymp->n_numaux;
1943 if ((*indexp < 0
1944 || (bfd_size_type) *indexp < syment_base)
1945 && (*sym_hash == NULL
1946 || (*sym_hash)->auxbfd != input_bfd))
1947 esym += add * isymesz;
1948 else
1950 struct coff_link_hash_entry *h;
1951 int i;
1953 h = NULL;
1954 if (*indexp < 0)
1956 h = *sym_hash;
1958 /* The m68k-motorola-sysv assembler will sometimes
1959 generate two symbols with the same name, but only one
1960 will have aux entries. */
1961 BFD_ASSERT (isymp->n_numaux == 0
1962 || h->numaux == 0
1963 || h->numaux == isymp->n_numaux);
1966 esym += isymesz;
1968 if (h == NULL)
1969 outsym += osymesz;
1971 /* Handle the aux entries. This handling is based on
1972 coff_pointerize_aux. I don't know if it always correct. */
1973 for (i = 0; i < isymp->n_numaux && esym < esym_end; i++)
1975 union internal_auxent aux;
1976 union internal_auxent *auxp;
1978 if (h != NULL && h->aux != NULL && (h->numaux > i))
1979 auxp = h->aux + i;
1980 else
1982 bfd_coff_swap_aux_in (input_bfd, esym, isymp->n_type,
1983 isymp->n_sclass, i, isymp->n_numaux, &aux);
1984 auxp = &aux;
1987 if (isymp->n_sclass == C_FILE)
1989 /* If this is a long filename, we must put it in the
1990 string table. */
1991 if (auxp->x_file.x_n.x_zeroes == 0
1992 && auxp->x_file.x_n.x_offset != 0)
1994 const char *filename;
1995 bfd_size_type indx;
1997 BFD_ASSERT (auxp->x_file.x_n.x_offset
1998 >= STRING_SIZE_SIZE);
1999 if (strings == NULL)
2001 strings = _bfd_coff_read_string_table (input_bfd);
2002 if (strings == NULL)
2003 return FALSE;
2005 filename = strings + auxp->x_file.x_n.x_offset;
2006 indx = _bfd_stringtab_add (finfo->strtab, filename,
2007 hash, copy);
2008 if (indx == (bfd_size_type) -1)
2009 return FALSE;
2010 auxp->x_file.x_n.x_offset = STRING_SIZE_SIZE + indx;
2013 else if ((isymp->n_sclass != C_STAT || isymp->n_type != T_NULL)
2014 && isymp->n_sclass != C_NT_WEAK)
2016 unsigned long indx;
2018 if (ISFCN (isymp->n_type)
2019 || ISTAG (isymp->n_sclass)
2020 || isymp->n_sclass == C_BLOCK
2021 || isymp->n_sclass == C_FCN)
2023 indx = auxp->x_sym.x_fcnary.x_fcn.x_endndx.l;
2024 if (indx > 0
2025 && indx < obj_raw_syment_count (input_bfd))
2027 /* We look forward through the symbol for
2028 the index of the next symbol we are going
2029 to include. I don't know if this is
2030 entirely right. */
2031 while ((finfo->sym_indices[indx] < 0
2032 || ((bfd_size_type) finfo->sym_indices[indx]
2033 < syment_base))
2034 && indx < obj_raw_syment_count (input_bfd))
2035 ++indx;
2036 if (indx >= obj_raw_syment_count (input_bfd))
2037 indx = output_index;
2038 else
2039 indx = finfo->sym_indices[indx];
2040 auxp->x_sym.x_fcnary.x_fcn.x_endndx.l = indx;
2044 indx = auxp->x_sym.x_tagndx.l;
2045 if (indx > 0 && indx < obj_raw_syment_count (input_bfd))
2047 long symindx;
2049 symindx = finfo->sym_indices[indx];
2050 if (symindx < 0)
2051 auxp->x_sym.x_tagndx.l = 0;
2052 else
2053 auxp->x_sym.x_tagndx.l = symindx;
2056 /* The .bf symbols are supposed to be linked through
2057 the endndx field. We need to carry this list
2058 across object files. */
2059 if (i == 0
2060 && h == NULL
2061 && isymp->n_sclass == C_FCN
2062 && (isymp->_n._n_n._n_zeroes != 0
2063 || isymp->_n._n_n._n_offset == 0)
2064 && isymp->_n._n_name[0] == '.'
2065 && isymp->_n._n_name[1] == 'b'
2066 && isymp->_n._n_name[2] == 'f'
2067 && isymp->_n._n_name[3] == '\0')
2069 if (finfo->last_bf_index != -1)
2071 finfo->last_bf.x_sym.x_fcnary.x_fcn.x_endndx.l =
2072 *indexp;
2074 if ((bfd_size_type) finfo->last_bf_index
2075 >= syment_base)
2077 void *auxout;
2079 /* The last .bf symbol is in this input
2080 file. This will only happen if the
2081 assembler did not set up the .bf
2082 endndx symbols correctly. */
2083 auxout = (finfo->outsyms
2084 + ((finfo->last_bf_index
2085 - syment_base)
2086 * osymesz));
2088 bfd_coff_swap_aux_out (output_bfd,
2089 &finfo->last_bf,
2090 isymp->n_type,
2091 isymp->n_sclass,
2092 0, isymp->n_numaux,
2093 auxout);
2095 else
2097 file_ptr pos;
2099 /* We have already written out the last
2100 .bf aux entry. We need to write it
2101 out again. We borrow *outsym
2102 temporarily. FIXME: This case should
2103 be made faster. */
2104 bfd_coff_swap_aux_out (output_bfd,
2105 &finfo->last_bf,
2106 isymp->n_type,
2107 isymp->n_sclass,
2108 0, isymp->n_numaux,
2109 outsym);
2110 pos = obj_sym_filepos (output_bfd);
2111 pos += finfo->last_bf_index * osymesz;
2112 if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
2113 || (bfd_bwrite (outsym, osymesz, output_bfd)
2114 != osymesz))
2115 return FALSE;
2119 if (auxp->x_sym.x_fcnary.x_fcn.x_endndx.l != 0)
2120 finfo->last_bf_index = -1;
2121 else
2123 /* The endndx field of this aux entry must
2124 be updated with the symbol number of the
2125 next .bf symbol. */
2126 finfo->last_bf = *auxp;
2127 finfo->last_bf_index = (((outsym - finfo->outsyms)
2128 / osymesz)
2129 + syment_base);
2134 if (h == NULL)
2136 bfd_coff_swap_aux_out (output_bfd, auxp, isymp->n_type,
2137 isymp->n_sclass, i, isymp->n_numaux,
2138 outsym);
2139 outsym += osymesz;
2142 esym += isymesz;
2146 indexp += add;
2147 isymp += add;
2148 sym_hash += add;
2151 /* Relocate the line numbers, unless we are stripping them. */
2152 if (finfo->info->strip == strip_none
2153 || finfo->info->strip == strip_some)
2155 for (o = input_bfd->sections; o != NULL; o = o->next)
2157 bfd_vma offset;
2158 bfd_byte *eline;
2159 bfd_byte *elineend;
2160 bfd_byte *oeline;
2161 bfd_boolean skipping;
2162 file_ptr pos;
2163 bfd_size_type amt;
2165 /* FIXME: If SEC_HAS_CONTENTS is not for the section, then
2166 build_link_order in ldwrite.c will not have created a
2167 link order, which means that we will not have seen this
2168 input section in _bfd_coff_final_link, which means that
2169 we will not have allocated space for the line numbers of
2170 this section. I don't think line numbers can be
2171 meaningful for a section which does not have
2172 SEC_HAS_CONTENTS set, but, if they do, this must be
2173 changed. */
2174 if (o->lineno_count == 0
2175 || (o->output_section->flags & SEC_HAS_CONTENTS) == 0)
2176 continue;
2178 if (bfd_seek (input_bfd, o->line_filepos, SEEK_SET) != 0
2179 || bfd_bread (finfo->linenos, linesz * o->lineno_count,
2180 input_bfd) != linesz * o->lineno_count)
2181 return FALSE;
2183 offset = o->output_section->vma + o->output_offset - o->vma;
2184 eline = finfo->linenos;
2185 oeline = finfo->linenos;
2186 elineend = eline + linesz * o->lineno_count;
2187 skipping = FALSE;
2188 for (; eline < elineend; eline += linesz)
2190 struct internal_lineno iline;
2192 bfd_coff_swap_lineno_in (input_bfd, eline, &iline);
2194 if (iline.l_lnno != 0)
2195 iline.l_addr.l_paddr += offset;
2196 else if (iline.l_addr.l_symndx >= 0
2197 && ((unsigned long) iline.l_addr.l_symndx
2198 < obj_raw_syment_count (input_bfd)))
2200 long indx;
2202 indx = finfo->sym_indices[iline.l_addr.l_symndx];
2204 if (indx < 0)
2206 /* These line numbers are attached to a symbol
2207 which we are stripping. We must discard the
2208 line numbers because reading them back with
2209 no associated symbol (or associating them all
2210 with symbol #0) will fail. We can't regain
2211 the space in the output file, but at least
2212 they're dense. */
2213 skipping = TRUE;
2215 else
2217 struct internal_syment is;
2218 union internal_auxent ia;
2220 /* Fix up the lnnoptr field in the aux entry of
2221 the symbol. It turns out that we can't do
2222 this when we modify the symbol aux entries,
2223 because gas sometimes screws up the lnnoptr
2224 field and makes it an offset from the start
2225 of the line numbers rather than an absolute
2226 file index. */
2227 bfd_coff_swap_sym_in (output_bfd,
2228 (finfo->outsyms
2229 + ((indx - syment_base)
2230 * osymesz)), &is);
2231 if ((ISFCN (is.n_type)
2232 || is.n_sclass == C_BLOCK)
2233 && is.n_numaux >= 1)
2235 void *auxptr;
2237 auxptr = (finfo->outsyms
2238 + ((indx - syment_base + 1)
2239 * osymesz));
2240 bfd_coff_swap_aux_in (output_bfd, auxptr,
2241 is.n_type, is.n_sclass,
2242 0, is.n_numaux, &ia);
2243 ia.x_sym.x_fcnary.x_fcn.x_lnnoptr =
2244 (o->output_section->line_filepos
2245 + o->output_section->lineno_count * linesz
2246 + eline - finfo->linenos);
2247 bfd_coff_swap_aux_out (output_bfd, &ia,
2248 is.n_type, is.n_sclass, 0,
2249 is.n_numaux, auxptr);
2252 skipping = FALSE;
2255 iline.l_addr.l_symndx = indx;
2258 if (!skipping)
2260 bfd_coff_swap_lineno_out (output_bfd, &iline, oeline);
2261 oeline += linesz;
2265 pos = o->output_section->line_filepos;
2266 pos += o->output_section->lineno_count * linesz;
2267 amt = oeline - finfo->linenos;
2268 if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
2269 || bfd_bwrite (finfo->linenos, amt, output_bfd) != amt)
2270 return FALSE;
2272 o->output_section->lineno_count += amt / linesz;
2276 /* If we swapped out a C_FILE symbol, guess that the next C_FILE
2277 symbol will be the first symbol in the next input file. In the
2278 normal case, this will save us from writing out the C_FILE symbol
2279 again. */
2280 if (finfo->last_file_index != -1
2281 && (bfd_size_type) finfo->last_file_index >= syment_base)
2283 finfo->last_file.n_value = output_index;
2284 bfd_coff_swap_sym_out (output_bfd, &finfo->last_file,
2285 (finfo->outsyms
2286 + ((finfo->last_file_index - syment_base)
2287 * osymesz)));
2290 /* Write the modified symbols to the output file. */
2291 if (outsym > finfo->outsyms)
2293 file_ptr pos;
2294 bfd_size_type amt;
2296 pos = obj_sym_filepos (output_bfd) + syment_base * osymesz;
2297 amt = outsym - finfo->outsyms;
2298 if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
2299 || bfd_bwrite (finfo->outsyms, amt, output_bfd) != amt)
2300 return FALSE;
2302 BFD_ASSERT ((obj_raw_syment_count (output_bfd)
2303 + (outsym - finfo->outsyms) / osymesz)
2304 == output_index);
2306 obj_raw_syment_count (output_bfd) = output_index;
2309 /* Relocate the contents of each section. */
2310 adjust_symndx = coff_backend_info (input_bfd)->_bfd_coff_adjust_symndx;
2311 for (o = input_bfd->sections; o != NULL; o = o->next)
2313 bfd_byte *contents;
2314 struct coff_section_tdata *secdata;
2316 if (! o->linker_mark)
2317 /* This section was omitted from the link. */
2318 continue;
2320 if ((o->flags & SEC_LINKER_CREATED) != 0)
2321 continue;
2323 if ((o->flags & SEC_HAS_CONTENTS) == 0
2324 || (o->size == 0 && (o->flags & SEC_RELOC) == 0))
2326 if ((o->flags & SEC_RELOC) != 0
2327 && o->reloc_count != 0)
2329 (*_bfd_error_handler)
2330 (_("%B: relocs in section `%A', but it has no contents"),
2331 input_bfd, o);
2332 bfd_set_error (bfd_error_no_contents);
2333 return FALSE;
2336 continue;
2339 secdata = coff_section_data (input_bfd, o);
2340 if (secdata != NULL && secdata->contents != NULL)
2341 contents = secdata->contents;
2342 else
2344 bfd_size_type x = o->rawsize ? o->rawsize : o->size;
2345 if (! bfd_get_section_contents (input_bfd, o, finfo->contents, 0, x))
2346 return FALSE;
2347 contents = finfo->contents;
2350 if ((o->flags & SEC_RELOC) != 0)
2352 int target_index;
2353 struct internal_reloc *internal_relocs;
2354 struct internal_reloc *irel;
2356 /* Read in the relocs. */
2357 target_index = o->output_section->target_index;
2358 internal_relocs = (_bfd_coff_read_internal_relocs
2359 (input_bfd, o, FALSE, finfo->external_relocs,
2360 finfo->info->relocatable,
2361 (finfo->info->relocatable
2362 ? (finfo->section_info[target_index].relocs
2363 + o->output_section->reloc_count)
2364 : finfo->internal_relocs)));
2365 if (internal_relocs == NULL)
2366 return FALSE;
2368 /* Call processor specific code to relocate the section
2369 contents. */
2370 if (! bfd_coff_relocate_section (output_bfd, finfo->info,
2371 input_bfd, o,
2372 contents,
2373 internal_relocs,
2374 finfo->internal_syms,
2375 finfo->sec_ptrs))
2376 return FALSE;
2378 if (finfo->info->relocatable)
2380 bfd_vma offset;
2381 struct internal_reloc *irelend;
2382 struct coff_link_hash_entry **rel_hash;
2384 offset = o->output_section->vma + o->output_offset - o->vma;
2385 irel = internal_relocs;
2386 irelend = irel + o->reloc_count;
2387 rel_hash = (finfo->section_info[target_index].rel_hashes
2388 + o->output_section->reloc_count);
2389 for (; irel < irelend; irel++, rel_hash++)
2391 struct coff_link_hash_entry *h;
2392 bfd_boolean adjusted;
2394 *rel_hash = NULL;
2396 /* Adjust the reloc address and symbol index. */
2397 irel->r_vaddr += offset;
2399 if (irel->r_symndx == -1)
2400 continue;
2402 if (adjust_symndx)
2404 if (! (*adjust_symndx) (output_bfd, finfo->info,
2405 input_bfd, o, irel,
2406 &adjusted))
2407 return FALSE;
2408 if (adjusted)
2409 continue;
2412 h = obj_coff_sym_hashes (input_bfd)[irel->r_symndx];
2413 if (h != NULL)
2415 /* This is a global symbol. */
2416 if (h->indx >= 0)
2417 irel->r_symndx = h->indx;
2418 else
2420 /* This symbol is being written at the end
2421 of the file, and we do not yet know the
2422 symbol index. We save the pointer to the
2423 hash table entry in the rel_hash list.
2424 We set the indx field to -2 to indicate
2425 that this symbol must not be stripped. */
2426 *rel_hash = h;
2427 h->indx = -2;
2430 else
2432 long indx;
2434 indx = finfo->sym_indices[irel->r_symndx];
2435 if (indx != -1)
2436 irel->r_symndx = indx;
2437 else
2439 struct internal_syment *is;
2440 const char *name;
2441 char buf[SYMNMLEN + 1];
2443 /* This reloc is against a symbol we are
2444 stripping. This should have been handled
2445 by the 'dont_skip_symbol' code in the while
2446 loop at the top of this function. */
2447 is = finfo->internal_syms + irel->r_symndx;
2449 name = (_bfd_coff_internal_syment_name
2450 (input_bfd, is, buf));
2451 if (name == NULL)
2452 return FALSE;
2454 if (! ((*finfo->info->callbacks->unattached_reloc)
2455 (finfo->info, name, input_bfd, o,
2456 irel->r_vaddr)))
2457 return FALSE;
2462 o->output_section->reloc_count += o->reloc_count;
2466 /* Write out the modified section contents. */
2467 if (secdata == NULL || secdata->stab_info == NULL)
2469 file_ptr loc = o->output_offset * bfd_octets_per_byte (output_bfd);
2470 if (! bfd_set_section_contents (output_bfd, o->output_section,
2471 contents, loc, o->size))
2472 return FALSE;
2474 else
2476 if (! (_bfd_write_section_stabs
2477 (output_bfd, &coff_hash_table (finfo->info)->stab_info,
2478 o, &secdata->stab_info, contents)))
2479 return FALSE;
2483 if (! finfo->info->keep_memory
2484 && ! _bfd_coff_free_symbols (input_bfd))
2485 return FALSE;
2487 return TRUE;
2490 /* Write out a global symbol. Called via coff_link_hash_traverse. */
2492 bfd_boolean
2493 _bfd_coff_write_global_sym (struct coff_link_hash_entry *h, void *data)
2495 struct coff_final_link_info *finfo = (struct coff_final_link_info *) data;
2496 bfd *output_bfd;
2497 struct internal_syment isym;
2498 bfd_size_type symesz;
2499 unsigned int i;
2500 file_ptr pos;
2502 output_bfd = finfo->output_bfd;
2504 if (h->root.type == bfd_link_hash_warning)
2506 h = (struct coff_link_hash_entry *) h->root.u.i.link;
2507 if (h->root.type == bfd_link_hash_new)
2508 return TRUE;
2511 if (h->indx >= 0)
2512 return TRUE;
2514 if (h->indx != -2
2515 && (finfo->info->strip == strip_all
2516 || (finfo->info->strip == strip_some
2517 && (bfd_hash_lookup (finfo->info->keep_hash,
2518 h->root.root.string, FALSE, FALSE)
2519 == NULL))))
2520 return TRUE;
2522 switch (h->root.type)
2524 default:
2525 case bfd_link_hash_new:
2526 case bfd_link_hash_warning:
2527 abort ();
2528 return FALSE;
2530 case bfd_link_hash_undefined:
2531 case bfd_link_hash_undefweak:
2532 isym.n_scnum = N_UNDEF;
2533 isym.n_value = 0;
2534 break;
2536 case bfd_link_hash_defined:
2537 case bfd_link_hash_defweak:
2539 asection *sec;
2541 sec = h->root.u.def.section->output_section;
2542 if (bfd_is_abs_section (sec))
2543 isym.n_scnum = N_ABS;
2544 else
2545 isym.n_scnum = sec->target_index;
2546 isym.n_value = (h->root.u.def.value
2547 + h->root.u.def.section->output_offset);
2548 if (! obj_pe (finfo->output_bfd))
2549 isym.n_value += sec->vma;
2551 break;
2553 case bfd_link_hash_common:
2554 isym.n_scnum = N_UNDEF;
2555 isym.n_value = h->root.u.c.size;
2556 break;
2558 case bfd_link_hash_indirect:
2559 /* Just ignore these. They can't be handled anyhow. */
2560 return TRUE;
2563 if (strlen (h->root.root.string) <= SYMNMLEN)
2564 strncpy (isym._n._n_name, h->root.root.string, SYMNMLEN);
2565 else
2567 bfd_boolean hash;
2568 bfd_size_type indx;
2570 hash = TRUE;
2571 if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
2572 hash = FALSE;
2573 indx = _bfd_stringtab_add (finfo->strtab, h->root.root.string, hash,
2574 FALSE);
2575 if (indx == (bfd_size_type) -1)
2577 finfo->failed = TRUE;
2578 return FALSE;
2580 isym._n._n_n._n_zeroes = 0;
2581 isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx;
2584 isym.n_sclass = h->symbol_class;
2585 isym.n_type = h->type;
2587 if (isym.n_sclass == C_NULL)
2588 isym.n_sclass = C_EXT;
2590 /* If doing task linking and this is the pass where we convert
2591 defined globals to statics, then do that conversion now. If the
2592 symbol is not being converted, just ignore it and it will be
2593 output during a later pass. */
2594 if (finfo->global_to_static)
2596 if (! IS_EXTERNAL (output_bfd, isym))
2597 return TRUE;
2599 isym.n_sclass = C_STAT;
2602 /* When a weak symbol is not overridden by a strong one,
2603 turn it into an external symbol when not building a
2604 shared or relocatable object. */
2605 if (! finfo->info->shared
2606 && ! finfo->info->relocatable
2607 && IS_WEAK_EXTERNAL (finfo->output_bfd, isym))
2608 isym.n_sclass = C_EXT;
2610 isym.n_numaux = h->numaux;
2612 bfd_coff_swap_sym_out (output_bfd, &isym, finfo->outsyms);
2614 symesz = bfd_coff_symesz (output_bfd);
2616 pos = obj_sym_filepos (output_bfd);
2617 pos += obj_raw_syment_count (output_bfd) * symesz;
2618 if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
2619 || bfd_bwrite (finfo->outsyms, symesz, output_bfd) != symesz)
2621 finfo->failed = TRUE;
2622 return FALSE;
2625 h->indx = obj_raw_syment_count (output_bfd);
2627 ++obj_raw_syment_count (output_bfd);
2629 /* Write out any associated aux entries. Most of the aux entries
2630 will have been modified in _bfd_coff_link_input_bfd. We have to
2631 handle section aux entries here, now that we have the final
2632 relocation and line number counts. */
2633 for (i = 0; i < isym.n_numaux; i++)
2635 union internal_auxent *auxp;
2637 auxp = h->aux + i;
2639 /* Look for a section aux entry here using the same tests that
2640 coff_swap_aux_out uses. */
2641 if (i == 0
2642 && (isym.n_sclass == C_STAT
2643 || isym.n_sclass == C_HIDDEN)
2644 && isym.n_type == T_NULL
2645 && (h->root.type == bfd_link_hash_defined
2646 || h->root.type == bfd_link_hash_defweak))
2648 asection *sec;
2650 sec = h->root.u.def.section->output_section;
2651 if (sec != NULL)
2653 auxp->x_scn.x_scnlen = sec->size;
2655 /* For PE, an overflow on the final link reportedly does
2656 not matter. FIXME: Why not? */
2657 if (sec->reloc_count > 0xffff
2658 && (! obj_pe (output_bfd)
2659 || finfo->info->relocatable))
2660 (*_bfd_error_handler)
2661 (_("%s: %s: reloc overflow: 0x%lx > 0xffff"),
2662 bfd_get_filename (output_bfd),
2663 bfd_get_section_name (output_bfd, sec),
2664 sec->reloc_count);
2666 if (sec->lineno_count > 0xffff
2667 && (! obj_pe (output_bfd)
2668 || finfo->info->relocatable))
2669 (*_bfd_error_handler)
2670 (_("%s: warning: %s: line number overflow: 0x%lx > 0xffff"),
2671 bfd_get_filename (output_bfd),
2672 bfd_get_section_name (output_bfd, sec),
2673 sec->lineno_count);
2675 auxp->x_scn.x_nreloc = sec->reloc_count;
2676 auxp->x_scn.x_nlinno = sec->lineno_count;
2677 auxp->x_scn.x_checksum = 0;
2678 auxp->x_scn.x_associated = 0;
2679 auxp->x_scn.x_comdat = 0;
2683 bfd_coff_swap_aux_out (output_bfd, auxp, isym.n_type,
2684 isym.n_sclass, (int) i, isym.n_numaux,
2685 finfo->outsyms);
2686 if (bfd_bwrite (finfo->outsyms, symesz, output_bfd) != symesz)
2688 finfo->failed = TRUE;
2689 return FALSE;
2691 ++obj_raw_syment_count (output_bfd);
2694 return TRUE;
2697 /* Write out task global symbols, converting them to statics. Called
2698 via coff_link_hash_traverse. Calls bfd_coff_write_global_sym to do
2699 the dirty work, if the symbol we are processing needs conversion. */
2701 bfd_boolean
2702 _bfd_coff_write_task_globals (struct coff_link_hash_entry *h, void *data)
2704 struct coff_final_link_info *finfo = (struct coff_final_link_info *) data;
2705 bfd_boolean rtnval = TRUE;
2706 bfd_boolean save_global_to_static;
2708 if (h->root.type == bfd_link_hash_warning)
2709 h = (struct coff_link_hash_entry *) h->root.u.i.link;
2711 if (h->indx < 0)
2713 switch (h->root.type)
2715 case bfd_link_hash_defined:
2716 case bfd_link_hash_defweak:
2717 save_global_to_static = finfo->global_to_static;
2718 finfo->global_to_static = TRUE;
2719 rtnval = _bfd_coff_write_global_sym (h, data);
2720 finfo->global_to_static = save_global_to_static;
2721 break;
2722 default:
2723 break;
2726 return (rtnval);
2729 /* Handle a link order which is supposed to generate a reloc. */
2731 bfd_boolean
2732 _bfd_coff_reloc_link_order (bfd *output_bfd,
2733 struct coff_final_link_info *finfo,
2734 asection *output_section,
2735 struct bfd_link_order *link_order)
2737 reloc_howto_type *howto;
2738 struct internal_reloc *irel;
2739 struct coff_link_hash_entry **rel_hash_ptr;
2741 howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc);
2742 if (howto == NULL)
2744 bfd_set_error (bfd_error_bad_value);
2745 return FALSE;
2748 if (link_order->u.reloc.p->addend != 0)
2750 bfd_size_type size;
2751 bfd_byte *buf;
2752 bfd_reloc_status_type rstat;
2753 bfd_boolean ok;
2754 file_ptr loc;
2756 size = bfd_get_reloc_size (howto);
2757 buf = (bfd_byte *) bfd_zmalloc (size);
2758 if (buf == NULL)
2759 return FALSE;
2761 rstat = _bfd_relocate_contents (howto, output_bfd,
2762 (bfd_vma) link_order->u.reloc.p->addend,\
2763 buf);
2764 switch (rstat)
2766 case bfd_reloc_ok:
2767 break;
2768 default:
2769 case bfd_reloc_outofrange:
2770 abort ();
2771 case bfd_reloc_overflow:
2772 if (! ((*finfo->info->callbacks->reloc_overflow)
2773 (finfo->info, NULL,
2774 (link_order->type == bfd_section_reloc_link_order
2775 ? bfd_section_name (output_bfd,
2776 link_order->u.reloc.p->u.section)
2777 : link_order->u.reloc.p->u.name),
2778 howto->name, link_order->u.reloc.p->addend,
2779 (bfd *) NULL, (asection *) NULL, (bfd_vma) 0)))
2781 free (buf);
2782 return FALSE;
2784 break;
2786 loc = link_order->offset * bfd_octets_per_byte (output_bfd);
2787 ok = bfd_set_section_contents (output_bfd, output_section, buf,
2788 loc, size);
2789 free (buf);
2790 if (! ok)
2791 return FALSE;
2794 /* Store the reloc information in the right place. It will get
2795 swapped and written out at the end of the final_link routine. */
2796 irel = (finfo->section_info[output_section->target_index].relocs
2797 + output_section->reloc_count);
2798 rel_hash_ptr = (finfo->section_info[output_section->target_index].rel_hashes
2799 + output_section->reloc_count);
2801 memset (irel, 0, sizeof (struct internal_reloc));
2802 *rel_hash_ptr = NULL;
2804 irel->r_vaddr = output_section->vma + link_order->offset;
2806 if (link_order->type == bfd_section_reloc_link_order)
2808 /* We need to somehow locate a symbol in the right section. The
2809 symbol must either have a value of zero, or we must adjust
2810 the addend by the value of the symbol. FIXME: Write this
2811 when we need it. The old linker couldn't handle this anyhow. */
2812 abort ();
2813 *rel_hash_ptr = NULL;
2814 irel->r_symndx = 0;
2816 else
2818 struct coff_link_hash_entry *h;
2820 h = ((struct coff_link_hash_entry *)
2821 bfd_wrapped_link_hash_lookup (output_bfd, finfo->info,
2822 link_order->u.reloc.p->u.name,
2823 FALSE, FALSE, TRUE));
2824 if (h != NULL)
2826 if (h->indx >= 0)
2827 irel->r_symndx = h->indx;
2828 else
2830 /* Set the index to -2 to force this symbol to get
2831 written out. */
2832 h->indx = -2;
2833 *rel_hash_ptr = h;
2834 irel->r_symndx = 0;
2837 else
2839 if (! ((*finfo->info->callbacks->unattached_reloc)
2840 (finfo->info, link_order->u.reloc.p->u.name, (bfd *) NULL,
2841 (asection *) NULL, (bfd_vma) 0)))
2842 return FALSE;
2843 irel->r_symndx = 0;
2847 /* FIXME: Is this always right? */
2848 irel->r_type = howto->type;
2850 /* r_size is only used on the RS/6000, which needs its own linker
2851 routines anyhow. r_extern is only used for ECOFF. */
2853 /* FIXME: What is the right value for r_offset? Is zero OK? */
2854 ++output_section->reloc_count;
2856 return TRUE;
2859 /* A basic reloc handling routine which may be used by processors with
2860 simple relocs. */
2862 bfd_boolean
2863 _bfd_coff_generic_relocate_section (bfd *output_bfd,
2864 struct bfd_link_info *info,
2865 bfd *input_bfd,
2866 asection *input_section,
2867 bfd_byte *contents,
2868 struct internal_reloc *relocs,
2869 struct internal_syment *syms,
2870 asection **sections)
2872 struct internal_reloc *rel;
2873 struct internal_reloc *relend;
2875 rel = relocs;
2876 relend = rel + input_section->reloc_count;
2877 for (; rel < relend; rel++)
2879 long symndx;
2880 struct coff_link_hash_entry *h;
2881 struct internal_syment *sym;
2882 bfd_vma addend;
2883 bfd_vma val;
2884 reloc_howto_type *howto;
2885 bfd_reloc_status_type rstat;
2887 symndx = rel->r_symndx;
2889 if (symndx == -1)
2891 h = NULL;
2892 sym = NULL;
2894 else if (symndx < 0
2895 || (unsigned long) symndx >= obj_raw_syment_count (input_bfd))
2897 (*_bfd_error_handler)
2898 ("%B: illegal symbol index %ld in relocs", input_bfd, symndx);
2899 return FALSE;
2901 else
2903 h = obj_coff_sym_hashes (input_bfd)[symndx];
2904 sym = syms + symndx;
2907 /* COFF treats common symbols in one of two ways. Either the
2908 size of the symbol is included in the section contents, or it
2909 is not. We assume that the size is not included, and force
2910 the rtype_to_howto function to adjust the addend as needed. */
2911 if (sym != NULL && sym->n_scnum != 0)
2912 addend = - sym->n_value;
2913 else
2914 addend = 0;
2916 howto = bfd_coff_rtype_to_howto (input_bfd, input_section, rel, h,
2917 sym, &addend);
2918 if (howto == NULL)
2919 return FALSE;
2921 /* If we are doing a relocatable link, then we can just ignore
2922 a PC relative reloc that is pcrel_offset. It will already
2923 have the correct value. If this is not a relocatable link,
2924 then we should ignore the symbol value. */
2925 if (howto->pc_relative && howto->pcrel_offset)
2927 if (info->relocatable)
2928 continue;
2929 if (sym != NULL && sym->n_scnum != 0)
2930 addend += sym->n_value;
2933 val = 0;
2935 if (h == NULL)
2937 asection *sec;
2939 if (symndx == -1)
2941 sec = bfd_abs_section_ptr;
2942 val = 0;
2944 else
2946 sec = sections[symndx];
2947 val = (sec->output_section->vma
2948 + sec->output_offset
2949 + sym->n_value);
2950 if (! obj_pe (input_bfd))
2951 val -= sec->vma;
2954 else
2956 if (h->root.type == bfd_link_hash_defined
2957 || h->root.type == bfd_link_hash_defweak)
2959 /* Defined weak symbols are a GNU extension. */
2960 asection *sec;
2962 sec = h->root.u.def.section;
2963 val = (h->root.u.def.value
2964 + sec->output_section->vma
2965 + sec->output_offset);
2968 else if (h->root.type == bfd_link_hash_undefweak)
2970 if (h->symbol_class == C_NT_WEAK && h->numaux == 1)
2972 /* See _Microsoft Portable Executable and Common Object
2973 File Format Specification_, section 5.5.3.
2974 Note that weak symbols without aux records are a GNU
2975 extension.
2976 FIXME: All weak externals are treated as having
2977 characteristic IMAGE_WEAK_EXTERN_SEARCH_NOLIBRARY (1).
2978 These behave as per SVR4 ABI: A library member
2979 will resolve a weak external only if a normal
2980 external causes the library member to be linked.
2981 See also linker.c: generic_link_check_archive_element. */
2982 asection *sec;
2983 struct coff_link_hash_entry *h2 =
2984 h->auxbfd->tdata.coff_obj_data->sym_hashes[
2985 h->aux->x_sym.x_tagndx.l];
2987 if (!h2 || h2->root.type == bfd_link_hash_undefined)
2989 sec = bfd_abs_section_ptr;
2990 val = 0;
2992 else
2994 sec = h2->root.u.def.section;
2995 val = h2->root.u.def.value
2996 + sec->output_section->vma + sec->output_offset;
2999 else
3000 /* This is a GNU extension. */
3001 val = 0;
3004 else if (! info->relocatable)
3006 if (! ((*info->callbacks->undefined_symbol)
3007 (info, h->root.root.string, input_bfd, input_section,
3008 rel->r_vaddr - input_section->vma, TRUE)))
3009 return FALSE;
3013 if (info->base_file)
3015 /* Emit a reloc if the backend thinks it needs it. */
3016 if (sym && pe_data (output_bfd)->in_reloc_p (output_bfd, howto))
3018 /* Relocation to a symbol in a section which isn't
3019 absolute. We output the address here to a file.
3020 This file is then read by dlltool when generating the
3021 reloc section. Note that the base file is not
3022 portable between systems. We write out a bfd_vma here,
3023 and dlltool reads in a bfd_vma. */
3024 bfd_vma addr = (rel->r_vaddr
3025 - input_section->vma
3026 + input_section->output_offset
3027 + input_section->output_section->vma);
3028 if (coff_data (output_bfd)->pe)
3029 addr -= pe_data(output_bfd)->pe_opthdr.ImageBase;
3030 if (fwrite (&addr, 1, sizeof (bfd_vma), (FILE *) info->base_file)
3031 != sizeof (bfd_vma))
3033 bfd_set_error (bfd_error_system_call);
3034 return FALSE;
3039 rstat = _bfd_final_link_relocate (howto, input_bfd, input_section,
3040 contents,
3041 rel->r_vaddr - input_section->vma,
3042 val, addend);
3044 switch (rstat)
3046 default:
3047 abort ();
3048 case bfd_reloc_ok:
3049 break;
3050 case bfd_reloc_outofrange:
3051 (*_bfd_error_handler)
3052 (_("%B: bad reloc address 0x%lx in section `%A'"),
3053 input_bfd, input_section, (unsigned long) rel->r_vaddr);
3054 return FALSE;
3055 case bfd_reloc_overflow:
3057 const char *name;
3058 char buf[SYMNMLEN + 1];
3060 if (symndx == -1)
3061 name = "*ABS*";
3062 else if (h != NULL)
3063 name = NULL;
3064 else
3066 name = _bfd_coff_internal_syment_name (input_bfd, sym, buf);
3067 if (name == NULL)
3068 return FALSE;
3071 if (! ((*info->callbacks->reloc_overflow)
3072 (info, (h ? &h->root : NULL), name, howto->name,
3073 (bfd_vma) 0, input_bfd, input_section,
3074 rel->r_vaddr - input_section->vma)))
3075 return FALSE;
3079 return TRUE;