1 /* COFF specific linker code.
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006, 2007 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. */
29 #include "coff/internal.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,
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
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,
77 if (ret != (struct coff_link_hash_entry *) NULL)
79 /* Set local fields. */
88 return (struct bfd_hash_entry *) ret;
91 /* Initialize a COFF linker hash table. */
94 _bfd_coff_link_hash_table_init (struct coff_link_hash_table *table,
96 struct bfd_hash_entry *(*newfunc) (struct bfd_hash_entry *,
97 struct bfd_hash_table *,
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 = bfd_malloc (amt);
117 if (! _bfd_coff_link_hash_table_init (ret, abfd,
118 _bfd_coff_link_hash_newfunc,
119 sizeof (struct coff_link_hash_entry)))
122 return (struct bfd_link_hash_table *) NULL;
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,
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
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. */
155 return (struct bfd_hash_entry *) ret;
158 /* Given a COFF BFD, add symbols to the global hash table as
162 _bfd_coff_link_add_symbols (bfd *abfd, struct bfd_link_info *info)
164 switch (bfd_get_format (abfd))
167 return coff_link_add_object_symbols (abfd, info);
169 return _bfd_generic_link_add_archive_symbols
170 (abfd, info, coff_link_check_archive_element);
172 bfd_set_error (bfd_error_wrong_format);
177 /* Add symbols from a COFF object file. */
180 coff_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info)
182 if (! _bfd_coff_get_external_symbols (abfd))
184 if (! coff_link_add_symbols (abfd, info))
187 if (! info->keep_memory
188 && ! _bfd_coff_free_symbols (abfd))
194 /* Look through the symbols to see if this object file should be
195 included in the link. */
198 coff_link_check_ar_symbols (bfd *abfd,
199 struct bfd_link_info *info,
200 bfd_boolean *pneeded)
202 bfd_size_type symesz;
208 symesz = bfd_coff_symesz (abfd);
209 esym = (bfd_byte *) obj_coff_external_syms (abfd);
210 esym_end = esym + obj_raw_syment_count (abfd) * symesz;
211 while (esym < esym_end)
213 struct internal_syment sym;
214 enum coff_symbol_classification classification;
216 bfd_coff_swap_sym_in (abfd, esym, &sym);
218 classification = bfd_coff_classify_symbol (abfd, &sym);
219 if (classification == COFF_SYMBOL_GLOBAL
220 || classification == COFF_SYMBOL_COMMON)
223 char buf[SYMNMLEN + 1];
224 struct bfd_link_hash_entry *h;
226 /* This symbol is externally visible, and is defined by this
228 name = _bfd_coff_internal_syment_name (abfd, &sym, buf);
231 h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE);
235 && info->pei386_auto_import
236 && CONST_STRNEQ (name, "__imp_"))
237 h = bfd_link_hash_lookup (info->hash, name + 6, FALSE, FALSE, TRUE);
239 /* We are only interested in symbols that are currently
240 undefined. If a symbol is currently known to be common,
241 COFF linkers do not bring in an object file which defines
243 if (h != (struct bfd_link_hash_entry *) NULL
244 && h->type == bfd_link_hash_undefined)
246 if (! (*info->callbacks->add_archive_element) (info, abfd, name))
253 esym += (sym.n_numaux + 1) * symesz;
256 /* We do not need this object file. */
260 /* Check a single archive element to see if we need to include it in
261 the link. *PNEEDED is set according to whether this element is
262 needed in the link or not. This is called via
263 _bfd_generic_link_add_archive_symbols. */
266 coff_link_check_archive_element (bfd *abfd,
267 struct bfd_link_info *info,
268 bfd_boolean *pneeded)
270 if (! _bfd_coff_get_external_symbols (abfd))
273 if (! coff_link_check_ar_symbols (abfd, info, pneeded))
277 && ! coff_link_add_symbols (abfd, info))
280 if ((! info->keep_memory || ! *pneeded)
281 && ! _bfd_coff_free_symbols (abfd))
287 /* Add all the symbols from an object file to the hash table. */
290 coff_link_add_symbols (bfd *abfd,
291 struct bfd_link_info *info)
293 unsigned int n_tmask = coff_data (abfd)->local_n_tmask;
294 unsigned int n_btshft = coff_data (abfd)->local_n_btshft;
295 unsigned int n_btmask = coff_data (abfd)->local_n_btmask;
296 bfd_boolean keep_syms;
297 bfd_boolean default_copy;
298 bfd_size_type symcount;
299 struct coff_link_hash_entry **sym_hash;
300 bfd_size_type symesz;
305 symcount = obj_raw_syment_count (abfd);
308 return TRUE; /* Nothing to do. */
310 /* Keep the symbols during this function, in case the linker needs
311 to read the generic symbols in order to report an error message. */
312 keep_syms = obj_coff_keep_syms (abfd);
313 obj_coff_keep_syms (abfd) = TRUE;
315 if (info->keep_memory)
316 default_copy = FALSE;
320 /* We keep a list of the linker hash table entries that correspond
321 to particular symbols. */
322 amt = symcount * sizeof (struct coff_link_hash_entry *);
323 sym_hash = bfd_zalloc (abfd, amt);
324 if (sym_hash == NULL)
326 obj_coff_sym_hashes (abfd) = sym_hash;
328 symesz = bfd_coff_symesz (abfd);
329 BFD_ASSERT (symesz == bfd_coff_auxesz (abfd));
330 esym = (bfd_byte *) obj_coff_external_syms (abfd);
331 esym_end = esym + symcount * symesz;
332 while (esym < esym_end)
334 struct internal_syment sym;
335 enum coff_symbol_classification classification;
338 bfd_coff_swap_sym_in (abfd, esym, &sym);
340 classification = bfd_coff_classify_symbol (abfd, &sym);
341 if (classification != COFF_SYMBOL_LOCAL)
344 char buf[SYMNMLEN + 1];
350 /* This symbol is externally visible. */
352 name = _bfd_coff_internal_syment_name (abfd, &sym, buf);
356 /* We must copy the name into memory if we got it from the
357 syment itself, rather than the string table. */
359 if (sym._n._n_n._n_zeroes != 0
360 || sym._n._n_n._n_offset == 0)
365 switch (classification)
370 case COFF_SYMBOL_GLOBAL:
371 flags = BSF_EXPORT | BSF_GLOBAL;
372 section = coff_section_from_bfd_index (abfd, sym.n_scnum);
374 value -= section->vma;
377 case COFF_SYMBOL_UNDEFINED:
379 section = bfd_und_section_ptr;
382 case COFF_SYMBOL_COMMON:
384 section = bfd_com_section_ptr;
387 case COFF_SYMBOL_PE_SECTION:
388 flags = BSF_SECTION_SYM | BSF_GLOBAL;
389 section = coff_section_from_bfd_index (abfd, sym.n_scnum);
393 if (IS_WEAK_EXTERNAL (abfd, sym))
398 /* In the PE format, section symbols actually refer to the
399 start of the output section. We handle them specially
401 if (obj_pe (abfd) && (flags & BSF_SECTION_SYM) != 0)
403 *sym_hash = coff_link_hash_lookup (coff_hash_table (info),
404 name, FALSE, copy, FALSE);
405 if (*sym_hash != NULL)
407 if (((*sym_hash)->coff_link_hash_flags
408 & COFF_LINK_HASH_PE_SECTION_SYMBOL) == 0
409 && (*sym_hash)->root.type != bfd_link_hash_undefined
410 && (*sym_hash)->root.type != bfd_link_hash_undefweak)
411 (*_bfd_error_handler)
412 ("Warning: symbol `%s' is both section and non-section",
419 /* The Microsoft Visual C compiler does string pooling by
420 hashing the constants to an internal symbol name, and
421 relying on the linker comdat support to discard
422 duplicate names. However, if one string is a literal and
423 one is a data initializer, one will end up in the .data
424 section and one will end up in the .rdata section. The
425 Microsoft linker will combine them into the .data
426 section, which seems to be wrong since it might cause the
429 As long as there are no external references to the
430 symbols, which there shouldn't be, we can treat the .data
431 and .rdata instances as separate symbols. The comdat
432 code in the linker will do the appropriate merging. Here
433 we avoid getting a multiple definition error for one of
434 these special symbols.
436 FIXME: I don't think this will work in the case where
437 there are two object files which use the constants as a
438 literal and two object files which use it as a data
439 initializer. One or the other of the second object files
440 is going to wind up with an inappropriate reference. */
442 && (classification == COFF_SYMBOL_GLOBAL
443 || classification == COFF_SYMBOL_PE_SECTION)
444 && coff_section_data (abfd, section) != NULL
445 && coff_section_data (abfd, section)->comdat != NULL
446 && CONST_STRNEQ (name, "??_")
447 && strcmp (name, coff_section_data (abfd, section)->comdat->name) == 0)
449 if (*sym_hash == NULL)
450 *sym_hash = coff_link_hash_lookup (coff_hash_table (info),
451 name, FALSE, copy, FALSE);
452 if (*sym_hash != NULL
453 && (*sym_hash)->root.type == bfd_link_hash_defined
454 && coff_section_data (abfd, (*sym_hash)->root.u.def.section)->comdat != NULL
455 && strcmp (coff_section_data (abfd, (*sym_hash)->root.u.def.section)->comdat->name,
456 coff_section_data (abfd, section)->comdat->name) == 0)
462 if (! (bfd_coff_link_add_one_symbol
463 (info, abfd, name, flags, section, value,
464 (const char *) NULL, copy, FALSE,
465 (struct bfd_link_hash_entry **) sym_hash)))
469 if (obj_pe (abfd) && (flags & BSF_SECTION_SYM) != 0)
470 (*sym_hash)->coff_link_hash_flags |=
471 COFF_LINK_HASH_PE_SECTION_SYMBOL;
473 /* Limit the alignment of a common symbol to the possible
474 alignment of a section. There is no point to permitting
475 a higher alignment for a common symbol: we can not
476 guarantee it, and it may cause us to allocate extra space
477 in the common section. */
478 if (section == bfd_com_section_ptr
479 && (*sym_hash)->root.type == bfd_link_hash_common
480 && ((*sym_hash)->root.u.c.p->alignment_power
481 > bfd_coff_default_section_alignment_power (abfd)))
482 (*sym_hash)->root.u.c.p->alignment_power
483 = bfd_coff_default_section_alignment_power (abfd);
485 if (info->hash->creator->flavour == bfd_get_flavour (abfd))
487 /* If we don't have any symbol information currently in
488 the hash table, or if we are looking at a symbol
489 definition, then update the symbol class and type in
491 if (((*sym_hash)->class == C_NULL
492 && (*sym_hash)->type == T_NULL)
495 && (*sym_hash)->root.type != bfd_link_hash_defined
496 && (*sym_hash)->root.type != bfd_link_hash_defweak))
498 (*sym_hash)->class = sym.n_sclass;
499 if (sym.n_type != T_NULL)
501 /* We want to warn if the type changed, but not
502 if it changed from an unspecified type.
503 Testing the whole type byte may work, but the
504 change from (e.g.) a function of unspecified
505 type to function of known type also wants to
507 if ((*sym_hash)->type != T_NULL
508 && (*sym_hash)->type != sym.n_type
509 && !(DTYPE ((*sym_hash)->type) == DTYPE (sym.n_type)
510 && (BTYPE ((*sym_hash)->type) == T_NULL
511 || BTYPE (sym.n_type) == T_NULL)))
512 (*_bfd_error_handler)
513 (_("Warning: type of symbol `%s' changed from %d to %d in %B"),
514 abfd, name, (*sym_hash)->type, sym.n_type);
516 /* We don't want to change from a meaningful
517 base type to a null one, but if we know
518 nothing, take what little we might now know. */
519 if (BTYPE (sym.n_type) != T_NULL
520 || (*sym_hash)->type == T_NULL)
521 (*sym_hash)->type = sym.n_type;
523 (*sym_hash)->auxbfd = abfd;
524 if (sym.n_numaux != 0)
526 union internal_auxent *alloc;
529 union internal_auxent *iaux;
531 (*sym_hash)->numaux = sym.n_numaux;
532 alloc = ((union internal_auxent *)
533 bfd_hash_allocate (&info->hash->table,
535 * sizeof (*alloc))));
538 for (i = 0, eaux = esym + symesz, iaux = alloc;
540 i++, eaux += symesz, iaux++)
541 bfd_coff_swap_aux_in (abfd, eaux, sym.n_type,
542 sym.n_sclass, (int) i,
544 (*sym_hash)->aux = alloc;
549 if (classification == COFF_SYMBOL_PE_SECTION
550 && (*sym_hash)->numaux != 0)
552 /* Some PE sections (such as .bss) have a zero size in
553 the section header, but a non-zero size in the AUX
554 record. Correct that here.
556 FIXME: This is not at all the right place to do this.
557 For example, it won't help objdump. This needs to be
558 done when we swap in the section header. */
559 BFD_ASSERT ((*sym_hash)->numaux == 1);
560 if (section->size == 0)
561 section->size = (*sym_hash)->aux[0].x_scn.x_scnlen;
563 /* FIXME: We could test whether the section sizes
564 matches the size in the aux entry, but apparently
565 that sometimes fails unexpectedly. */
569 esym += (sym.n_numaux + 1) * symesz;
570 sym_hash += sym.n_numaux + 1;
573 /* If this is a non-traditional, non-relocatable link, try to
574 optimize the handling of any .stab/.stabstr sections. */
575 if (! info->relocatable
576 && ! info->traditional_format
577 && info->hash->creator->flavour == bfd_get_flavour (abfd)
578 && (info->strip != strip_all && info->strip != strip_debugger))
582 stabstr = bfd_get_section_by_name (abfd, ".stabstr");
586 bfd_size_type string_offset = 0;
589 for (stab = abfd->sections; stab; stab = stab->next)
590 if (CONST_STRNEQ (stab->name, ".stab")
592 || (stab->name[5] == '.' && ISDIGIT (stab->name[6]))))
594 struct coff_link_hash_table *table;
595 struct coff_section_tdata *secdata
596 = coff_section_data (abfd, stab);
600 amt = sizeof (struct coff_section_tdata);
601 stab->used_by_bfd = bfd_zalloc (abfd, amt);
602 if (stab->used_by_bfd == NULL)
604 secdata = coff_section_data (abfd, stab);
607 table = coff_hash_table (info);
609 if (! _bfd_link_section_stabs (abfd, &table->stab_info,
618 obj_coff_keep_syms (abfd) = keep_syms;
623 obj_coff_keep_syms (abfd) = keep_syms;
627 /* Do the final link step. */
630 _bfd_coff_final_link (bfd *abfd,
631 struct bfd_link_info *info)
633 bfd_size_type symesz;
634 struct coff_final_link_info finfo;
635 bfd_boolean debug_merge_allocated;
636 bfd_boolean long_section_names;
638 struct bfd_link_order *p;
639 bfd_size_type max_sym_count;
640 bfd_size_type max_lineno_count;
641 bfd_size_type max_reloc_count;
642 bfd_size_type max_output_reloc_count;
643 bfd_size_type max_contents_size;
644 file_ptr rel_filepos;
646 file_ptr line_filepos;
649 bfd_byte *external_relocs = NULL;
650 char strbuf[STRING_SIZE_SIZE];
653 symesz = bfd_coff_symesz (abfd);
656 finfo.output_bfd = abfd;
658 finfo.section_info = NULL;
659 finfo.last_file_index = -1;
660 finfo.last_bf_index = -1;
661 finfo.internal_syms = NULL;
662 finfo.sec_ptrs = NULL;
663 finfo.sym_indices = NULL;
664 finfo.outsyms = NULL;
665 finfo.linenos = NULL;
666 finfo.contents = NULL;
667 finfo.external_relocs = NULL;
668 finfo.internal_relocs = NULL;
669 finfo.global_to_static = FALSE;
670 debug_merge_allocated = FALSE;
672 coff_data (abfd)->link_info = info;
674 finfo.strtab = _bfd_stringtab_init ();
675 if (finfo.strtab == NULL)
678 if (! coff_debug_merge_hash_table_init (&finfo.debug_merge))
680 debug_merge_allocated = TRUE;
682 /* Compute the file positions for all the sections. */
683 if (! abfd->output_has_begun)
685 if (! bfd_coff_compute_section_file_positions (abfd))
689 /* Count the line numbers and relocation entries required for the
690 output file. Set the file positions for the relocs. */
691 rel_filepos = obj_relocbase (abfd);
692 relsz = bfd_coff_relsz (abfd);
693 max_contents_size = 0;
694 max_lineno_count = 0;
697 long_section_names = FALSE;
698 for (o = abfd->sections; o != NULL; o = o->next)
702 for (p = o->map_head.link_order; p != NULL; p = p->next)
704 if (p->type == bfd_indirect_link_order)
708 sec = p->u.indirect.section;
710 /* Mark all sections which are to be included in the
711 link. This will normally be every section. We need
712 to do this so that we can identify any sections which
713 the linker has decided to not include. */
714 sec->linker_mark = TRUE;
716 if (info->strip == strip_none
717 || info->strip == strip_some)
718 o->lineno_count += sec->lineno_count;
720 if (info->relocatable)
721 o->reloc_count += sec->reloc_count;
723 if (sec->rawsize > max_contents_size)
724 max_contents_size = sec->rawsize;
725 if (sec->size > max_contents_size)
726 max_contents_size = sec->size;
727 if (sec->lineno_count > max_lineno_count)
728 max_lineno_count = sec->lineno_count;
729 if (sec->reloc_count > max_reloc_count)
730 max_reloc_count = sec->reloc_count;
732 else if (info->relocatable
733 && (p->type == bfd_section_reloc_link_order
734 || p->type == bfd_symbol_reloc_link_order))
737 if (o->reloc_count == 0)
741 o->flags |= SEC_RELOC;
742 o->rel_filepos = rel_filepos;
743 rel_filepos += o->reloc_count * relsz;
744 /* In PE COFF, if there are at least 0xffff relocations an
745 extra relocation will be written out to encode the count. */
746 if (obj_pe (abfd) && o->reloc_count >= 0xffff)
747 rel_filepos += relsz;
750 if (bfd_coff_long_section_names (abfd)
751 && strlen (o->name) > SCNNMLEN)
753 /* This section has a long name which must go in the string
754 table. This must correspond to the code in
755 coff_write_object_contents which puts the string index
756 into the s_name field of the section header. That is why
757 we pass hash as FALSE. */
758 if (_bfd_stringtab_add (finfo.strtab, o->name, FALSE, FALSE)
759 == (bfd_size_type) -1)
761 long_section_names = TRUE;
765 /* If doing a relocatable link, allocate space for the pointers we
767 if (info->relocatable)
771 /* We use section_count + 1, rather than section_count, because
772 the target_index fields are 1 based. */
773 amt = abfd->section_count + 1;
774 amt *= sizeof (struct coff_link_section_info);
775 finfo.section_info = bfd_malloc (amt);
776 if (finfo.section_info == NULL)
778 for (i = 0; i <= abfd->section_count; i++)
780 finfo.section_info[i].relocs = NULL;
781 finfo.section_info[i].rel_hashes = NULL;
785 /* We now know the size of the relocs, so we can determine the file
786 positions of the line numbers. */
787 line_filepos = rel_filepos;
788 linesz = bfd_coff_linesz (abfd);
789 max_output_reloc_count = 0;
790 for (o = abfd->sections; o != NULL; o = o->next)
792 if (o->lineno_count == 0)
796 o->line_filepos = line_filepos;
797 line_filepos += o->lineno_count * linesz;
800 if (o->reloc_count != 0)
802 /* We don't know the indices of global symbols until we have
803 written out all the local symbols. For each section in
804 the output file, we keep an array of pointers to hash
805 table entries. Each entry in the array corresponds to a
806 reloc. When we find a reloc against a global symbol, we
807 set the corresponding entry in this array so that we can
808 fix up the symbol index after we have written out all the
811 Because of this problem, we also keep the relocs in
812 memory until the end of the link. This wastes memory,
813 but only when doing a relocatable link, which is not the
815 BFD_ASSERT (info->relocatable);
816 amt = o->reloc_count;
817 amt *= sizeof (struct internal_reloc);
818 finfo.section_info[o->target_index].relocs = bfd_malloc (amt);
819 amt = o->reloc_count;
820 amt *= sizeof (struct coff_link_hash_entry *);
821 finfo.section_info[o->target_index].rel_hashes = bfd_malloc (amt);
822 if (finfo.section_info[o->target_index].relocs == NULL
823 || finfo.section_info[o->target_index].rel_hashes == NULL)
826 if (o->reloc_count > max_output_reloc_count)
827 max_output_reloc_count = o->reloc_count;
830 /* Reset the reloc and lineno counts, so that we can use them to
831 count the number of entries we have output so far. */
836 obj_sym_filepos (abfd) = line_filepos;
838 /* Figure out the largest number of symbols in an input BFD. Take
839 the opportunity to clear the output_has_begun fields of all the
842 for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
846 sub->output_has_begun = FALSE;
847 sz = obj_raw_syment_count (sub);
848 if (sz > max_sym_count)
852 /* Allocate some buffers used while linking. */
853 amt = max_sym_count * sizeof (struct internal_syment);
854 finfo.internal_syms = bfd_malloc (amt);
855 amt = max_sym_count * sizeof (asection *);
856 finfo.sec_ptrs = bfd_malloc (amt);
857 amt = max_sym_count * sizeof (long);
858 finfo.sym_indices = bfd_malloc (amt);
859 finfo.outsyms = bfd_malloc ((max_sym_count + 1) * symesz);
860 amt = max_lineno_count * bfd_coff_linesz (abfd);
861 finfo.linenos = bfd_malloc (amt);
862 finfo.contents = bfd_malloc (max_contents_size);
863 amt = max_reloc_count * relsz;
864 finfo.external_relocs = bfd_malloc (amt);
865 if (! info->relocatable)
867 amt = max_reloc_count * sizeof (struct internal_reloc);
868 finfo.internal_relocs = bfd_malloc (amt);
870 if ((finfo.internal_syms == NULL && max_sym_count > 0)
871 || (finfo.sec_ptrs == NULL && max_sym_count > 0)
872 || (finfo.sym_indices == NULL && max_sym_count > 0)
873 || finfo.outsyms == NULL
874 || (finfo.linenos == NULL && max_lineno_count > 0)
875 || (finfo.contents == NULL && max_contents_size > 0)
876 || (finfo.external_relocs == NULL && max_reloc_count > 0)
877 || (! info->relocatable
878 && finfo.internal_relocs == NULL
879 && max_reloc_count > 0))
882 /* We now know the position of everything in the file, except that
883 we don't know the size of the symbol table and therefore we don't
884 know where the string table starts. We just build the string
885 table in memory as we go along. We process all the relocations
886 for a single input file at once. */
887 obj_raw_syment_count (abfd) = 0;
889 if (coff_backend_info (abfd)->_bfd_coff_start_final_link)
891 if (! bfd_coff_start_final_link (abfd, info))
895 for (o = abfd->sections; o != NULL; o = o->next)
897 for (p = o->map_head.link_order; p != NULL; p = p->next)
899 if (p->type == bfd_indirect_link_order
900 && bfd_family_coff (p->u.indirect.section->owner))
902 sub = p->u.indirect.section->owner;
903 if (! bfd_coff_link_output_has_begun (sub, & finfo))
905 if (! _bfd_coff_link_input_bfd (&finfo, sub))
907 sub->output_has_begun = TRUE;
910 else if (p->type == bfd_section_reloc_link_order
911 || p->type == bfd_symbol_reloc_link_order)
913 if (! _bfd_coff_reloc_link_order (abfd, &finfo, o, p))
918 if (! _bfd_default_link_order (abfd, info, o, p))
924 if (! bfd_coff_final_link_postscript (abfd, & finfo))
927 /* Free up the buffers used by _bfd_coff_link_input_bfd. */
929 coff_debug_merge_hash_table_free (&finfo.debug_merge);
930 debug_merge_allocated = FALSE;
932 if (finfo.internal_syms != NULL)
934 free (finfo.internal_syms);
935 finfo.internal_syms = NULL;
937 if (finfo.sec_ptrs != NULL)
939 free (finfo.sec_ptrs);
940 finfo.sec_ptrs = NULL;
942 if (finfo.sym_indices != NULL)
944 free (finfo.sym_indices);
945 finfo.sym_indices = NULL;
947 if (finfo.linenos != NULL)
949 free (finfo.linenos);
950 finfo.linenos = NULL;
952 if (finfo.contents != NULL)
954 free (finfo.contents);
955 finfo.contents = NULL;
957 if (finfo.external_relocs != NULL)
959 free (finfo.external_relocs);
960 finfo.external_relocs = NULL;
962 if (finfo.internal_relocs != NULL)
964 free (finfo.internal_relocs);
965 finfo.internal_relocs = NULL;
968 /* The value of the last C_FILE symbol is supposed to be the symbol
969 index of the first external symbol. Write it out again if
971 if (finfo.last_file_index != -1
972 && (unsigned int) finfo.last_file.n_value != obj_raw_syment_count (abfd))
976 finfo.last_file.n_value = obj_raw_syment_count (abfd);
977 bfd_coff_swap_sym_out (abfd, &finfo.last_file,
980 pos = obj_sym_filepos (abfd) + finfo.last_file_index * symesz;
981 if (bfd_seek (abfd, pos, SEEK_SET) != 0
982 || bfd_bwrite (finfo.outsyms, symesz, abfd) != symesz)
986 /* If doing task linking (ld --task-link) then make a pass through the
987 global symbols, writing out any that are defined, and making them
991 finfo.failed = FALSE;
992 coff_link_hash_traverse (coff_hash_table (info),
993 _bfd_coff_write_task_globals, &finfo);
998 /* Write out the global symbols. */
999 finfo.failed = FALSE;
1000 coff_link_hash_traverse (coff_hash_table (info),
1001 _bfd_coff_write_global_sym, &finfo);
1005 /* The outsyms buffer is used by _bfd_coff_write_global_sym. */
1006 if (finfo.outsyms != NULL)
1008 free (finfo.outsyms);
1009 finfo.outsyms = NULL;
1012 if (info->relocatable && max_output_reloc_count > 0)
1014 /* Now that we have written out all the global symbols, we know
1015 the symbol indices to use for relocs against them, and we can
1016 finally write out the relocs. */
1017 amt = max_output_reloc_count * relsz;
1018 external_relocs = bfd_malloc (amt);
1019 if (external_relocs == NULL)
1022 for (o = abfd->sections; o != NULL; o = o->next)
1024 struct internal_reloc *irel;
1025 struct internal_reloc *irelend;
1026 struct coff_link_hash_entry **rel_hash;
1029 if (o->reloc_count == 0)
1032 irel = finfo.section_info[o->target_index].relocs;
1033 irelend = irel + o->reloc_count;
1034 rel_hash = finfo.section_info[o->target_index].rel_hashes;
1035 erel = external_relocs;
1036 for (; irel < irelend; irel++, rel_hash++, erel += relsz)
1038 if (*rel_hash != NULL)
1040 BFD_ASSERT ((*rel_hash)->indx >= 0);
1041 irel->r_symndx = (*rel_hash)->indx;
1043 bfd_coff_swap_reloc_out (abfd, irel, erel);
1046 if (bfd_seek (abfd, o->rel_filepos, SEEK_SET) != 0)
1048 if (obj_pe (abfd) && o->reloc_count >= 0xffff)
1050 /* In PE COFF, write the count of relocs as the first
1051 reloc. The header overflow bit will be set
1053 struct internal_reloc incount;
1054 bfd_byte *excount = (bfd_byte *)bfd_malloc (relsz);
1056 memset (&incount, 0, sizeof (incount));
1057 incount.r_vaddr = o->reloc_count + 1;
1058 bfd_coff_swap_reloc_out (abfd, (PTR) &incount, (PTR) excount);
1059 if (bfd_bwrite (excount, relsz, abfd) != relsz)
1060 /* We'll leak, but it's an error anyway. */
1064 if (bfd_bwrite (external_relocs,
1065 (bfd_size_type) relsz * o->reloc_count, abfd)
1066 != (bfd_size_type) relsz * o->reloc_count)
1070 free (external_relocs);
1071 external_relocs = NULL;
1074 /* Free up the section information. */
1075 if (finfo.section_info != NULL)
1079 for (i = 0; i < abfd->section_count; i++)
1081 if (finfo.section_info[i].relocs != NULL)
1082 free (finfo.section_info[i].relocs);
1083 if (finfo.section_info[i].rel_hashes != NULL)
1084 free (finfo.section_info[i].rel_hashes);
1086 free (finfo.section_info);
1087 finfo.section_info = NULL;
1090 /* If we have optimized stabs strings, output them. */
1091 if (coff_hash_table (info)->stab_info.stabstr != NULL)
1093 if (! _bfd_write_stab_strings (abfd, &coff_hash_table (info)->stab_info))
1097 /* Write out the string table. */
1098 if (obj_raw_syment_count (abfd) != 0 || long_section_names)
1102 pos = obj_sym_filepos (abfd) + obj_raw_syment_count (abfd) * symesz;
1103 if (bfd_seek (abfd, pos, SEEK_SET) != 0)
1106 #if STRING_SIZE_SIZE == 4
1108 _bfd_stringtab_size (finfo.strtab) + STRING_SIZE_SIZE,
1111 #error Change H_PUT_32 above
1114 if (bfd_bwrite (strbuf, (bfd_size_type) STRING_SIZE_SIZE, abfd)
1115 != STRING_SIZE_SIZE)
1118 if (! _bfd_stringtab_emit (abfd, finfo.strtab))
1121 obj_coff_strings_written (abfd) = TRUE;
1124 _bfd_stringtab_free (finfo.strtab);
1126 /* Setting bfd_get_symcount to 0 will cause write_object_contents to
1127 not try to write out the symbols. */
1128 bfd_get_symcount (abfd) = 0;
1133 if (debug_merge_allocated)
1134 coff_debug_merge_hash_table_free (&finfo.debug_merge);
1135 if (finfo.strtab != NULL)
1136 _bfd_stringtab_free (finfo.strtab);
1137 if (finfo.section_info != NULL)
1141 for (i = 0; i < abfd->section_count; i++)
1143 if (finfo.section_info[i].relocs != NULL)
1144 free (finfo.section_info[i].relocs);
1145 if (finfo.section_info[i].rel_hashes != NULL)
1146 free (finfo.section_info[i].rel_hashes);
1148 free (finfo.section_info);
1150 if (finfo.internal_syms != NULL)
1151 free (finfo.internal_syms);
1152 if (finfo.sec_ptrs != NULL)
1153 free (finfo.sec_ptrs);
1154 if (finfo.sym_indices != NULL)
1155 free (finfo.sym_indices);
1156 if (finfo.outsyms != NULL)
1157 free (finfo.outsyms);
1158 if (finfo.linenos != NULL)
1159 free (finfo.linenos);
1160 if (finfo.contents != NULL)
1161 free (finfo.contents);
1162 if (finfo.external_relocs != NULL)
1163 free (finfo.external_relocs);
1164 if (finfo.internal_relocs != NULL)
1165 free (finfo.internal_relocs);
1166 if (external_relocs != NULL)
1167 free (external_relocs);
1171 /* Parse out a -heap <reserved>,<commit> line. */
1174 dores_com (char *ptr, bfd *output_bfd, int heap)
1176 if (coff_data(output_bfd)->pe)
1178 int val = strtoul (ptr, &ptr, 0);
1181 pe_data(output_bfd)->pe_opthdr.SizeOfHeapReserve = val;
1183 pe_data(output_bfd)->pe_opthdr.SizeOfStackReserve = val;
1187 val = strtoul (ptr+1, &ptr, 0);
1189 pe_data(output_bfd)->pe_opthdr.SizeOfHeapCommit = val;
1191 pe_data(output_bfd)->pe_opthdr.SizeOfStackCommit = val;
1198 get_name (char *ptr, char **dst)
1203 while (*ptr && *ptr != ' ')
1209 /* Process any magic embedded commands in a section called .drectve. */
1212 process_embedded_commands (bfd *output_bfd,
1213 struct bfd_link_info *info ATTRIBUTE_UNUSED,
1216 asection *sec = bfd_get_section_by_name (abfd, ".drectve");
1224 if (!bfd_malloc_and_get_section (abfd, sec, ©))
1230 e = (char *) copy + sec->size;
1232 for (s = (char *) copy; s < e ; )
1239 if (CONST_STRNEQ (s, "-attr"))
1249 s = get_name (s, &name);
1250 s = get_name (s, &attribs);
1270 asec = bfd_get_section_by_name (abfd, name);
1274 asec->flags |= SEC_CODE;
1276 asec->flags |= SEC_READONLY;
1279 else if (CONST_STRNEQ (s, "-heap"))
1280 s = dores_com (s + 5, output_bfd, 1);
1282 else if (CONST_STRNEQ (s, "-stack"))
1283 s = dores_com (s + 6, output_bfd, 0);
1292 /* Place a marker against all symbols which are used by relocations.
1293 This marker can be picked up by the 'do we skip this symbol ?'
1294 loop in _bfd_coff_link_input_bfd() and used to prevent skipping
1298 mark_relocs (struct coff_final_link_info *finfo, bfd *input_bfd)
1302 if ((bfd_get_file_flags (input_bfd) & HAS_SYMS) == 0)
1305 for (a = input_bfd->sections; a != (asection *) NULL; a = a->next)
1307 struct internal_reloc * internal_relocs;
1308 struct internal_reloc * irel;
1309 struct internal_reloc * irelend;
1311 if ((a->flags & SEC_RELOC) == 0 || a->reloc_count < 1)
1313 /* Don't mark relocs in excluded sections. */
1314 if (a->output_section == bfd_abs_section_ptr)
1317 /* Read in the relocs. */
1318 internal_relocs = _bfd_coff_read_internal_relocs
1319 (input_bfd, a, FALSE,
1320 finfo->external_relocs,
1321 finfo->info->relocatable,
1322 (finfo->info->relocatable
1323 ? (finfo->section_info[ a->output_section->target_index ].relocs + a->output_section->reloc_count)
1324 : finfo->internal_relocs)
1327 if (internal_relocs == NULL)
1330 irel = internal_relocs;
1331 irelend = irel + a->reloc_count;
1333 /* Place a mark in the sym_indices array (whose entries have
1334 been initialised to 0) for all of the symbols that are used
1335 in the relocation table. This will then be picked up in the
1336 skip/don't-skip pass. */
1337 for (; irel < irelend; irel++)
1338 finfo->sym_indices[ irel->r_symndx ] = -1;
1342 /* Link an input file into the linker output file. This function
1343 handles all the sections and relocations of the input file at once. */
1346 _bfd_coff_link_input_bfd (struct coff_final_link_info *finfo, bfd *input_bfd)
1348 unsigned int n_tmask = coff_data (input_bfd)->local_n_tmask;
1349 unsigned int n_btshft = coff_data (input_bfd)->local_n_btshft;
1350 bfd_boolean (*adjust_symndx)
1351 (bfd *, struct bfd_link_info *, bfd *, asection *,
1352 struct internal_reloc *, bfd_boolean *);
1354 const char *strings;
1355 bfd_size_type syment_base;
1356 bfd_boolean copy, hash;
1357 bfd_size_type isymesz;
1358 bfd_size_type osymesz;
1359 bfd_size_type linesz;
1362 struct internal_syment *isymp;
1365 unsigned long output_index;
1367 struct coff_link_hash_entry **sym_hash;
1370 /* Move all the symbols to the output file. */
1372 output_bfd = finfo->output_bfd;
1374 syment_base = obj_raw_syment_count (output_bfd);
1375 isymesz = bfd_coff_symesz (input_bfd);
1376 osymesz = bfd_coff_symesz (output_bfd);
1377 linesz = bfd_coff_linesz (input_bfd);
1378 BFD_ASSERT (linesz == bfd_coff_linesz (output_bfd));
1381 if (! finfo->info->keep_memory)
1384 if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
1387 if (! _bfd_coff_get_external_symbols (input_bfd))
1390 esym = (bfd_byte *) obj_coff_external_syms (input_bfd);
1391 esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz;
1392 isymp = finfo->internal_syms;
1393 secpp = finfo->sec_ptrs;
1394 indexp = finfo->sym_indices;
1395 output_index = syment_base;
1396 outsym = finfo->outsyms;
1398 if (coff_data (output_bfd)->pe
1399 && ! process_embedded_commands (output_bfd, finfo->info, input_bfd))
1402 /* If we are going to perform relocations and also strip/discard some
1403 symbols then we must make sure that we do not strip/discard those
1404 symbols that are going to be involved in the relocations. */
1405 if (( finfo->info->strip != strip_none
1406 || finfo->info->discard != discard_none)
1407 && finfo->info->relocatable)
1409 /* Mark the symbol array as 'not-used'. */
1410 memset (indexp, 0, obj_raw_syment_count (input_bfd) * sizeof * indexp);
1412 mark_relocs (finfo, input_bfd);
1415 while (esym < esym_end)
1417 struct internal_syment isym;
1418 enum coff_symbol_classification classification;
1421 bfd_boolean dont_skip_symbol;
1424 bfd_coff_swap_sym_in (input_bfd, esym, isymp);
1426 /* Make a copy of *isymp so that the relocate_section function
1427 always sees the original values. This is more reliable than
1428 always recomputing the symbol value even if we are stripping
1432 classification = bfd_coff_classify_symbol (input_bfd, &isym);
1433 switch (classification)
1437 case COFF_SYMBOL_GLOBAL:
1438 case COFF_SYMBOL_PE_SECTION:
1439 case COFF_SYMBOL_LOCAL:
1440 *secpp = coff_section_from_bfd_index (input_bfd, isym.n_scnum);
1442 case COFF_SYMBOL_COMMON:
1443 *secpp = bfd_com_section_ptr;
1445 case COFF_SYMBOL_UNDEFINED:
1446 *secpp = bfd_und_section_ptr;
1450 /* Extract the flag indicating if this symbol is used by a
1452 if ((finfo->info->strip != strip_none
1453 || finfo->info->discard != discard_none)
1454 && finfo->info->relocatable)
1455 dont_skip_symbol = *indexp;
1457 dont_skip_symbol = FALSE;
1463 add = 1 + isym.n_numaux;
1465 /* If we are stripping all symbols, we want to skip this one. */
1466 if (finfo->info->strip == strip_all && ! dont_skip_symbol)
1471 switch (classification)
1475 case COFF_SYMBOL_GLOBAL:
1476 case COFF_SYMBOL_COMMON:
1477 case COFF_SYMBOL_PE_SECTION:
1478 /* This is a global symbol. Global symbols come at the
1479 end of the symbol table, so skip them for now.
1480 Locally defined function symbols, however, are an
1481 exception, and are not moved to the end. */
1483 if (! ISFCN (isym.n_type))
1487 case COFF_SYMBOL_UNDEFINED:
1488 /* Undefined symbols are left for the end. */
1493 case COFF_SYMBOL_LOCAL:
1494 /* This is a local symbol. Skip it if we are discarding
1496 if (finfo->info->discard == discard_all && ! dont_skip_symbol)
1502 #ifndef COFF_WITH_PE
1503 /* Skip section symbols for sections which are not going to be
1506 && dont_skip_symbol == 0
1507 && isym.n_sclass == C_STAT
1508 && isym.n_type == T_NULL
1509 && isym.n_numaux > 0
1510 && (*secpp)->output_section == bfd_abs_section_ptr)
1514 /* If we stripping debugging symbols, and this is a debugging
1515 symbol, then skip it. FIXME: gas sets the section to N_ABS
1516 for some types of debugging symbols; I don't know if this is
1517 a bug or not. In any case, we handle it here. */
1519 && finfo->info->strip == strip_debugger
1520 && ! dont_skip_symbol
1521 && (isym.n_scnum == N_DEBUG
1522 || (isym.n_scnum == N_ABS
1523 && (isym.n_sclass == C_AUTO
1524 || isym.n_sclass == C_REG
1525 || isym.n_sclass == C_MOS
1526 || isym.n_sclass == C_MOE
1527 || isym.n_sclass == C_MOU
1528 || isym.n_sclass == C_ARG
1529 || isym.n_sclass == C_REGPARM
1530 || isym.n_sclass == C_FIELD
1531 || isym.n_sclass == C_EOS))))
1534 /* If some symbols are stripped based on the name, work out the
1535 name and decide whether to skip this symbol. */
1537 && (finfo->info->strip == strip_some
1538 || finfo->info->discard == discard_l))
1541 char buf[SYMNMLEN + 1];
1543 name = _bfd_coff_internal_syment_name (input_bfd, &isym, buf);
1547 if (! dont_skip_symbol
1548 && ((finfo->info->strip == strip_some
1549 && (bfd_hash_lookup (finfo->info->keep_hash, name, FALSE,
1552 && finfo->info->discard == discard_l
1553 && bfd_is_local_label_name (input_bfd, name))))
1557 /* If this is an enum, struct, or union tag, see if we have
1558 already output an identical type. */
1560 && (finfo->output_bfd->flags & BFD_TRADITIONAL_FORMAT) == 0
1561 && (isym.n_sclass == C_ENTAG
1562 || isym.n_sclass == C_STRTAG
1563 || isym.n_sclass == C_UNTAG)
1564 && isym.n_numaux == 1)
1567 char buf[SYMNMLEN + 1];
1568 struct coff_debug_merge_hash_entry *mh;
1569 struct coff_debug_merge_type *mt;
1570 union internal_auxent aux;
1571 struct coff_debug_merge_element **epp;
1572 bfd_byte *esl, *eslend;
1573 struct internal_syment *islp;
1576 name = _bfd_coff_internal_syment_name (input_bfd, &isym, buf);
1580 /* Ignore fake names invented by compiler; treat them all as
1582 if (*name == '~' || *name == '.' || *name == '$'
1583 || (*name == bfd_get_symbol_leading_char (input_bfd)
1584 && (name[1] == '~' || name[1] == '.' || name[1] == '$')))
1587 mh = coff_debug_merge_hash_lookup (&finfo->debug_merge, name,
1592 /* Allocate memory to hold type information. If this turns
1593 out to be a duplicate, we pass this address to
1595 amt = sizeof (struct coff_debug_merge_type);
1596 mt = bfd_alloc (input_bfd, amt);
1599 mt->class = isym.n_sclass;
1601 /* Pick up the aux entry, which points to the end of the tag
1603 bfd_coff_swap_aux_in (input_bfd, (esym + isymesz),
1604 isym.n_type, isym.n_sclass, 0, isym.n_numaux,
1607 /* Gather the elements. */
1608 epp = &mt->elements;
1609 mt->elements = NULL;
1611 esl = esym + 2 * isymesz;
1612 eslend = ((bfd_byte *) obj_coff_external_syms (input_bfd)
1613 + aux.x_sym.x_fcnary.x_fcn.x_endndx.l * isymesz);
1614 while (esl < eslend)
1616 const char *elename;
1617 char elebuf[SYMNMLEN + 1];
1620 bfd_coff_swap_sym_in (input_bfd, esl, islp);
1622 amt = sizeof (struct coff_debug_merge_element);
1623 *epp = bfd_alloc (input_bfd, amt);
1627 elename = _bfd_coff_internal_syment_name (input_bfd, islp,
1629 if (elename == NULL)
1632 amt = strlen (elename) + 1;
1633 name_copy = bfd_alloc (input_bfd, amt);
1634 if (name_copy == NULL)
1636 strcpy (name_copy, elename);
1638 (*epp)->name = name_copy;
1639 (*epp)->type = islp->n_type;
1641 if (islp->n_numaux >= 1
1642 && islp->n_type != T_NULL
1643 && islp->n_sclass != C_EOS)
1645 union internal_auxent eleaux;
1648 bfd_coff_swap_aux_in (input_bfd, (esl + isymesz),
1649 islp->n_type, islp->n_sclass, 0,
1650 islp->n_numaux, &eleaux);
1651 indx = eleaux.x_sym.x_tagndx.l;
1653 /* FIXME: If this tagndx entry refers to a symbol
1654 defined later in this file, we just ignore it.
1655 Handling this correctly would be tedious, and may
1660 (bfd_byte *) obj_coff_external_syms (input_bfd))
1663 (*epp)->tagndx = finfo->sym_indices[indx];
1664 if ((*epp)->tagndx < 0)
1668 epp = &(*epp)->next;
1671 esl += (islp->n_numaux + 1) * isymesz;
1672 islp += islp->n_numaux + 1;
1675 /* See if we already have a definition which matches this
1676 type. We always output the type if it has no elements,
1678 if (mt->elements == NULL)
1679 bfd_release (input_bfd, mt);
1682 struct coff_debug_merge_type *mtl;
1684 for (mtl = mh->types; mtl != NULL; mtl = mtl->next)
1686 struct coff_debug_merge_element *me, *mel;
1688 if (mtl->class != mt->class)
1691 for (me = mt->elements, mel = mtl->elements;
1692 me != NULL && mel != NULL;
1693 me = me->next, mel = mel->next)
1695 if (strcmp (me->name, mel->name) != 0
1696 || me->type != mel->type
1697 || me->tagndx != mel->tagndx)
1701 if (me == NULL && mel == NULL)
1705 if (mtl == NULL || (bfd_size_type) mtl->indx >= syment_base)
1707 /* This is the first definition of this type. */
1708 mt->indx = output_index;
1709 mt->next = mh->types;
1714 /* This is a redefinition which can be merged. */
1715 bfd_release (input_bfd, mt);
1716 *indexp = mtl->indx;
1717 add = (eslend - esym) / isymesz;
1723 /* We now know whether we are to skip this symbol or not. */
1726 /* Adjust the symbol in order to output it. */
1728 if (isym._n._n_n._n_zeroes == 0
1729 && isym._n._n_n._n_offset != 0)
1734 /* This symbol has a long name. Enter it in the string
1735 table we are building. Note that we do not check
1736 bfd_coff_symname_in_debug. That is only true for
1737 XCOFF, and XCOFF requires different linking code
1739 name = _bfd_coff_internal_syment_name (input_bfd, &isym, NULL);
1742 indx = _bfd_stringtab_add (finfo->strtab, name, hash, copy);
1743 if (indx == (bfd_size_type) -1)
1745 isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx;
1748 switch (isym.n_sclass)
1764 /* The symbol value should not be modified. */
1768 if (obj_pe (input_bfd)
1769 && strcmp (isym.n_name, ".bf") != 0
1770 && isym.n_scnum > 0)
1772 /* For PE, .lf and .ef get their value left alone,
1773 while .bf gets relocated. However, they all have
1774 "real" section numbers, and need to be moved into
1776 isym.n_scnum = (*secpp)->output_section->target_index;
1781 case C_LABEL: /* Not completely sure about these 2 */
1790 /* Compute new symbol location. */
1791 if (isym.n_scnum > 0)
1793 isym.n_scnum = (*secpp)->output_section->target_index;
1794 isym.n_value += (*secpp)->output_offset;
1795 if (! obj_pe (input_bfd))
1796 isym.n_value -= (*secpp)->vma;
1797 if (! obj_pe (finfo->output_bfd))
1798 isym.n_value += (*secpp)->output_section->vma;
1803 /* The value of a C_FILE symbol is the symbol index of
1804 the next C_FILE symbol. The value of the last C_FILE
1805 symbol is the symbol index to the first external
1806 symbol (actually, coff_renumber_symbols does not get
1807 this right--it just sets the value of the last C_FILE
1808 symbol to zero--and nobody has ever complained about
1809 it). We try to get this right, below, just before we
1810 write the symbols out, but in the general case we may
1811 have to write the symbol out twice. */
1812 if (finfo->last_file_index != -1
1813 && finfo->last_file.n_value != (bfd_vma) output_index)
1815 /* We must correct the value of the last C_FILE
1817 finfo->last_file.n_value = output_index;
1818 if ((bfd_size_type) finfo->last_file_index >= syment_base)
1820 /* The last C_FILE symbol is in this input file. */
1821 bfd_coff_swap_sym_out (output_bfd,
1824 + ((finfo->last_file_index
1832 /* We have already written out the last C_FILE
1833 symbol. We need to write it out again. We
1834 borrow *outsym temporarily. */
1835 bfd_coff_swap_sym_out (output_bfd,
1836 &finfo->last_file, outsym);
1837 pos = obj_sym_filepos (output_bfd);
1838 pos += finfo->last_file_index * osymesz;
1839 if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
1840 || bfd_bwrite (outsym, osymesz, output_bfd) != osymesz)
1845 finfo->last_file_index = output_index;
1846 finfo->last_file = isym;
1850 /* If doing task linking, convert normal global function symbols to
1851 static functions. */
1852 if (finfo->info->task_link && IS_EXTERNAL (input_bfd, isym))
1853 isym.n_sclass = C_STAT;
1855 /* Output the symbol. */
1856 bfd_coff_swap_sym_out (output_bfd, &isym, outsym);
1858 *indexp = output_index;
1863 struct coff_link_hash_entry *h;
1865 indx = ((esym - (bfd_byte *) obj_coff_external_syms (input_bfd))
1867 h = obj_coff_sym_hashes (input_bfd)[indx];
1870 /* This can happen if there were errors earlier in
1872 bfd_set_error (bfd_error_bad_value);
1875 h->indx = output_index;
1878 output_index += add;
1879 outsym += add * osymesz;
1882 esym += add * isymesz;
1886 for (--add; add > 0; --add)
1893 /* Fix up the aux entries. This must be done in a separate pass,
1894 because we don't know the correct symbol indices until we have
1895 already decided which symbols we are going to keep. */
1896 esym = (bfd_byte *) obj_coff_external_syms (input_bfd);
1897 esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz;
1898 isymp = finfo->internal_syms;
1899 indexp = finfo->sym_indices;
1900 sym_hash = obj_coff_sym_hashes (input_bfd);
1901 outsym = finfo->outsyms;
1903 while (esym < esym_end)
1907 add = 1 + isymp->n_numaux;
1910 || (bfd_size_type) *indexp < syment_base)
1911 && (*sym_hash == NULL
1912 || (*sym_hash)->auxbfd != input_bfd))
1913 esym += add * isymesz;
1916 struct coff_link_hash_entry *h;
1924 /* The m68k-motorola-sysv assembler will sometimes
1925 generate two symbols with the same name, but only one
1926 will have aux entries. */
1927 BFD_ASSERT (isymp->n_numaux == 0
1929 || h->numaux == isymp->n_numaux);
1937 /* Handle the aux entries. This handling is based on
1938 coff_pointerize_aux. I don't know if it always correct. */
1939 for (i = 0; i < isymp->n_numaux && esym < esym_end; i++)
1941 union internal_auxent aux;
1942 union internal_auxent *auxp;
1944 if (h != NULL && h->aux != NULL && (h->numaux > i))
1948 bfd_coff_swap_aux_in (input_bfd, esym, isymp->n_type,
1949 isymp->n_sclass, i, isymp->n_numaux, &aux);
1953 if (isymp->n_sclass == C_FILE)
1955 /* If this is a long filename, we must put it in the
1957 if (auxp->x_file.x_n.x_zeroes == 0
1958 && auxp->x_file.x_n.x_offset != 0)
1960 const char *filename;
1963 BFD_ASSERT (auxp->x_file.x_n.x_offset
1964 >= STRING_SIZE_SIZE);
1965 if (strings == NULL)
1967 strings = _bfd_coff_read_string_table (input_bfd);
1968 if (strings == NULL)
1971 filename = strings + auxp->x_file.x_n.x_offset;
1972 indx = _bfd_stringtab_add (finfo->strtab, filename,
1974 if (indx == (bfd_size_type) -1)
1976 auxp->x_file.x_n.x_offset = STRING_SIZE_SIZE + indx;
1979 else if ((isymp->n_sclass != C_STAT || isymp->n_type != T_NULL)
1980 && isymp->n_sclass != C_NT_WEAK)
1984 if (ISFCN (isymp->n_type)
1985 || ISTAG (isymp->n_sclass)
1986 || isymp->n_sclass == C_BLOCK
1987 || isymp->n_sclass == C_FCN)
1989 indx = auxp->x_sym.x_fcnary.x_fcn.x_endndx.l;
1991 && indx < obj_raw_syment_count (input_bfd))
1993 /* We look forward through the symbol for
1994 the index of the next symbol we are going
1995 to include. I don't know if this is
1997 while ((finfo->sym_indices[indx] < 0
1998 || ((bfd_size_type) finfo->sym_indices[indx]
2000 && indx < obj_raw_syment_count (input_bfd))
2002 if (indx >= obj_raw_syment_count (input_bfd))
2003 indx = output_index;
2005 indx = finfo->sym_indices[indx];
2006 auxp->x_sym.x_fcnary.x_fcn.x_endndx.l = indx;
2010 indx = auxp->x_sym.x_tagndx.l;
2011 if (indx > 0 && indx < obj_raw_syment_count (input_bfd))
2015 symindx = finfo->sym_indices[indx];
2017 auxp->x_sym.x_tagndx.l = 0;
2019 auxp->x_sym.x_tagndx.l = symindx;
2022 /* The .bf symbols are supposed to be linked through
2023 the endndx field. We need to carry this list
2024 across object files. */
2027 && isymp->n_sclass == C_FCN
2028 && (isymp->_n._n_n._n_zeroes != 0
2029 || isymp->_n._n_n._n_offset == 0)
2030 && isymp->_n._n_name[0] == '.'
2031 && isymp->_n._n_name[1] == 'b'
2032 && isymp->_n._n_name[2] == 'f'
2033 && isymp->_n._n_name[3] == '\0')
2035 if (finfo->last_bf_index != -1)
2037 finfo->last_bf.x_sym.x_fcnary.x_fcn.x_endndx.l =
2040 if ((bfd_size_type) finfo->last_bf_index
2045 /* The last .bf symbol is in this input
2046 file. This will only happen if the
2047 assembler did not set up the .bf
2048 endndx symbols correctly. */
2049 auxout = (finfo->outsyms
2050 + ((finfo->last_bf_index
2054 bfd_coff_swap_aux_out (output_bfd,
2065 /* We have already written out the last
2066 .bf aux entry. We need to write it
2067 out again. We borrow *outsym
2068 temporarily. FIXME: This case should
2070 bfd_coff_swap_aux_out (output_bfd,
2076 pos = obj_sym_filepos (output_bfd);
2077 pos += finfo->last_bf_index * osymesz;
2078 if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
2079 || (bfd_bwrite (outsym, osymesz, output_bfd)
2085 if (auxp->x_sym.x_fcnary.x_fcn.x_endndx.l != 0)
2086 finfo->last_bf_index = -1;
2089 /* The endndx field of this aux entry must
2090 be updated with the symbol number of the
2092 finfo->last_bf = *auxp;
2093 finfo->last_bf_index = (((outsym - finfo->outsyms)
2102 bfd_coff_swap_aux_out (output_bfd, auxp, isymp->n_type,
2103 isymp->n_sclass, i, isymp->n_numaux,
2117 /* Relocate the line numbers, unless we are stripping them. */
2118 if (finfo->info->strip == strip_none
2119 || finfo->info->strip == strip_some)
2121 for (o = input_bfd->sections; o != NULL; o = o->next)
2127 bfd_boolean skipping;
2131 /* FIXME: If SEC_HAS_CONTENTS is not for the section, then
2132 build_link_order in ldwrite.c will not have created a
2133 link order, which means that we will not have seen this
2134 input section in _bfd_coff_final_link, which means that
2135 we will not have allocated space for the line numbers of
2136 this section. I don't think line numbers can be
2137 meaningful for a section which does not have
2138 SEC_HAS_CONTENTS set, but, if they do, this must be
2140 if (o->lineno_count == 0
2141 || (o->output_section->flags & SEC_HAS_CONTENTS) == 0)
2144 if (bfd_seek (input_bfd, o->line_filepos, SEEK_SET) != 0
2145 || bfd_bread (finfo->linenos, linesz * o->lineno_count,
2146 input_bfd) != linesz * o->lineno_count)
2149 offset = o->output_section->vma + o->output_offset - o->vma;
2150 eline = finfo->linenos;
2151 oeline = finfo->linenos;
2152 elineend = eline + linesz * o->lineno_count;
2154 for (; eline < elineend; eline += linesz)
2156 struct internal_lineno iline;
2158 bfd_coff_swap_lineno_in (input_bfd, eline, &iline);
2160 if (iline.l_lnno != 0)
2161 iline.l_addr.l_paddr += offset;
2162 else if (iline.l_addr.l_symndx >= 0
2163 && ((unsigned long) iline.l_addr.l_symndx
2164 < obj_raw_syment_count (input_bfd)))
2168 indx = finfo->sym_indices[iline.l_addr.l_symndx];
2172 /* These line numbers are attached to a symbol
2173 which we are stripping. We must discard the
2174 line numbers because reading them back with
2175 no associated symbol (or associating them all
2176 with symbol #0) will fail. We can't regain
2177 the space in the output file, but at least
2183 struct internal_syment is;
2184 union internal_auxent ia;
2186 /* Fix up the lnnoptr field in the aux entry of
2187 the symbol. It turns out that we can't do
2188 this when we modify the symbol aux entries,
2189 because gas sometimes screws up the lnnoptr
2190 field and makes it an offset from the start
2191 of the line numbers rather than an absolute
2193 bfd_coff_swap_sym_in (output_bfd,
2195 + ((indx - syment_base)
2197 if ((ISFCN (is.n_type)
2198 || is.n_sclass == C_BLOCK)
2199 && is.n_numaux >= 1)
2203 auxptr = (finfo->outsyms
2204 + ((indx - syment_base + 1)
2206 bfd_coff_swap_aux_in (output_bfd, auxptr,
2207 is.n_type, is.n_sclass,
2208 0, is.n_numaux, &ia);
2209 ia.x_sym.x_fcnary.x_fcn.x_lnnoptr =
2210 (o->output_section->line_filepos
2211 + o->output_section->lineno_count * linesz
2212 + eline - finfo->linenos);
2213 bfd_coff_swap_aux_out (output_bfd, &ia,
2214 is.n_type, is.n_sclass, 0,
2215 is.n_numaux, auxptr);
2221 iline.l_addr.l_symndx = indx;
2226 bfd_coff_swap_lineno_out (output_bfd, &iline, oeline);
2231 pos = o->output_section->line_filepos;
2232 pos += o->output_section->lineno_count * linesz;
2233 amt = oeline - finfo->linenos;
2234 if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
2235 || bfd_bwrite (finfo->linenos, amt, output_bfd) != amt)
2238 o->output_section->lineno_count += amt / linesz;
2242 /* If we swapped out a C_FILE symbol, guess that the next C_FILE
2243 symbol will be the first symbol in the next input file. In the
2244 normal case, this will save us from writing out the C_FILE symbol
2246 if (finfo->last_file_index != -1
2247 && (bfd_size_type) finfo->last_file_index >= syment_base)
2249 finfo->last_file.n_value = output_index;
2250 bfd_coff_swap_sym_out (output_bfd, &finfo->last_file,
2252 + ((finfo->last_file_index - syment_base)
2256 /* Write the modified symbols to the output file. */
2257 if (outsym > finfo->outsyms)
2262 pos = obj_sym_filepos (output_bfd) + syment_base * osymesz;
2263 amt = outsym - finfo->outsyms;
2264 if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
2265 || bfd_bwrite (finfo->outsyms, amt, output_bfd) != amt)
2268 BFD_ASSERT ((obj_raw_syment_count (output_bfd)
2269 + (outsym - finfo->outsyms) / osymesz)
2272 obj_raw_syment_count (output_bfd) = output_index;
2275 /* Relocate the contents of each section. */
2276 adjust_symndx = coff_backend_info (input_bfd)->_bfd_coff_adjust_symndx;
2277 for (o = input_bfd->sections; o != NULL; o = o->next)
2280 struct coff_section_tdata *secdata;
2282 if (! o->linker_mark)
2283 /* This section was omitted from the link. */
2286 if ((o->flags & SEC_LINKER_CREATED) != 0)
2289 if ((o->flags & SEC_HAS_CONTENTS) == 0
2290 || (o->size == 0 && (o->flags & SEC_RELOC) == 0))
2292 if ((o->flags & SEC_RELOC) != 0
2293 && o->reloc_count != 0)
2295 (*_bfd_error_handler)
2296 (_("%B: relocs in section `%A', but it has no contents"),
2298 bfd_set_error (bfd_error_no_contents);
2305 secdata = coff_section_data (input_bfd, o);
2306 if (secdata != NULL && secdata->contents != NULL)
2307 contents = secdata->contents;
2310 bfd_size_type x = o->rawsize ? o->rawsize : o->size;
2311 if (! bfd_get_section_contents (input_bfd, o, finfo->contents, 0, x))
2313 contents = finfo->contents;
2316 if ((o->flags & SEC_RELOC) != 0)
2319 struct internal_reloc *internal_relocs;
2320 struct internal_reloc *irel;
2322 /* Read in the relocs. */
2323 target_index = o->output_section->target_index;
2324 internal_relocs = (_bfd_coff_read_internal_relocs
2325 (input_bfd, o, FALSE, finfo->external_relocs,
2326 finfo->info->relocatable,
2327 (finfo->info->relocatable
2328 ? (finfo->section_info[target_index].relocs
2329 + o->output_section->reloc_count)
2330 : finfo->internal_relocs)));
2331 if (internal_relocs == NULL)
2334 /* Call processor specific code to relocate the section
2336 if (! bfd_coff_relocate_section (output_bfd, finfo->info,
2340 finfo->internal_syms,
2344 if (finfo->info->relocatable)
2347 struct internal_reloc *irelend;
2348 struct coff_link_hash_entry **rel_hash;
2350 offset = o->output_section->vma + o->output_offset - o->vma;
2351 irel = internal_relocs;
2352 irelend = irel + o->reloc_count;
2353 rel_hash = (finfo->section_info[target_index].rel_hashes
2354 + o->output_section->reloc_count);
2355 for (; irel < irelend; irel++, rel_hash++)
2357 struct coff_link_hash_entry *h;
2358 bfd_boolean adjusted;
2362 /* Adjust the reloc address and symbol index. */
2363 irel->r_vaddr += offset;
2365 if (irel->r_symndx == -1)
2370 if (! (*adjust_symndx) (output_bfd, finfo->info,
2378 h = obj_coff_sym_hashes (input_bfd)[irel->r_symndx];
2381 /* This is a global symbol. */
2383 irel->r_symndx = h->indx;
2386 /* This symbol is being written at the end
2387 of the file, and we do not yet know the
2388 symbol index. We save the pointer to the
2389 hash table entry in the rel_hash list.
2390 We set the indx field to -2 to indicate
2391 that this symbol must not be stripped. */
2400 indx = finfo->sym_indices[irel->r_symndx];
2402 irel->r_symndx = indx;
2405 struct internal_syment *is;
2407 char buf[SYMNMLEN + 1];
2409 /* This reloc is against a symbol we are
2410 stripping. This should have been handled
2411 by the 'dont_skip_symbol' code in the while
2412 loop at the top of this function. */
2413 is = finfo->internal_syms + irel->r_symndx;
2415 name = (_bfd_coff_internal_syment_name
2416 (input_bfd, is, buf));
2420 if (! ((*finfo->info->callbacks->unattached_reloc)
2421 (finfo->info, name, input_bfd, o,
2428 o->output_section->reloc_count += o->reloc_count;
2432 /* Write out the modified section contents. */
2433 if (secdata == NULL || secdata->stab_info == NULL)
2435 file_ptr loc = o->output_offset * bfd_octets_per_byte (output_bfd);
2436 if (! bfd_set_section_contents (output_bfd, o->output_section,
2437 contents, loc, o->size))
2442 if (! (_bfd_write_section_stabs
2443 (output_bfd, &coff_hash_table (finfo->info)->stab_info,
2444 o, &secdata->stab_info, contents)))
2449 if (! finfo->info->keep_memory
2450 && ! _bfd_coff_free_symbols (input_bfd))
2456 /* Write out a global symbol. Called via coff_link_hash_traverse. */
2459 _bfd_coff_write_global_sym (struct coff_link_hash_entry *h, void *data)
2461 struct coff_final_link_info *finfo = (struct coff_final_link_info *) data;
2463 struct internal_syment isym;
2464 bfd_size_type symesz;
2468 output_bfd = finfo->output_bfd;
2470 if (h->root.type == bfd_link_hash_warning)
2472 h = (struct coff_link_hash_entry *) h->root.u.i.link;
2473 if (h->root.type == bfd_link_hash_new)
2481 && (finfo->info->strip == strip_all
2482 || (finfo->info->strip == strip_some
2483 && (bfd_hash_lookup (finfo->info->keep_hash,
2484 h->root.root.string, FALSE, FALSE)
2488 switch (h->root.type)
2491 case bfd_link_hash_new:
2492 case bfd_link_hash_warning:
2496 case bfd_link_hash_undefined:
2497 case bfd_link_hash_undefweak:
2498 isym.n_scnum = N_UNDEF;
2502 case bfd_link_hash_defined:
2503 case bfd_link_hash_defweak:
2507 sec = h->root.u.def.section->output_section;
2508 if (bfd_is_abs_section (sec))
2509 isym.n_scnum = N_ABS;
2511 isym.n_scnum = sec->target_index;
2512 isym.n_value = (h->root.u.def.value
2513 + h->root.u.def.section->output_offset);
2514 if (! obj_pe (finfo->output_bfd))
2515 isym.n_value += sec->vma;
2519 case bfd_link_hash_common:
2520 isym.n_scnum = N_UNDEF;
2521 isym.n_value = h->root.u.c.size;
2524 case bfd_link_hash_indirect:
2525 /* Just ignore these. They can't be handled anyhow. */
2529 if (strlen (h->root.root.string) <= SYMNMLEN)
2530 strncpy (isym._n._n_name, h->root.root.string, SYMNMLEN);
2537 if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
2539 indx = _bfd_stringtab_add (finfo->strtab, h->root.root.string, hash,
2541 if (indx == (bfd_size_type) -1)
2543 finfo->failed = TRUE;
2546 isym._n._n_n._n_zeroes = 0;
2547 isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx;
2550 isym.n_sclass = h->class;
2551 isym.n_type = h->type;
2553 if (isym.n_sclass == C_NULL)
2554 isym.n_sclass = C_EXT;
2556 /* If doing task linking and this is the pass where we convert
2557 defined globals to statics, then do that conversion now. If the
2558 symbol is not being converted, just ignore it and it will be
2559 output during a later pass. */
2560 if (finfo->global_to_static)
2562 if (! IS_EXTERNAL (output_bfd, isym))
2565 isym.n_sclass = C_STAT;
2568 /* When a weak symbol is not overridden by a strong one,
2569 turn it into an external symbol when not building a
2570 shared or relocatable object. */
2571 if (! finfo->info->shared
2572 && ! finfo->info->relocatable
2573 && IS_WEAK_EXTERNAL (finfo->output_bfd, isym))
2574 isym.n_sclass = C_EXT;
2576 isym.n_numaux = h->numaux;
2578 bfd_coff_swap_sym_out (output_bfd, &isym, finfo->outsyms);
2580 symesz = bfd_coff_symesz (output_bfd);
2582 pos = obj_sym_filepos (output_bfd);
2583 pos += obj_raw_syment_count (output_bfd) * symesz;
2584 if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
2585 || bfd_bwrite (finfo->outsyms, symesz, output_bfd) != symesz)
2587 finfo->failed = TRUE;
2591 h->indx = obj_raw_syment_count (output_bfd);
2593 ++obj_raw_syment_count (output_bfd);
2595 /* Write out any associated aux entries. Most of the aux entries
2596 will have been modified in _bfd_coff_link_input_bfd. We have to
2597 handle section aux entries here, now that we have the final
2598 relocation and line number counts. */
2599 for (i = 0; i < isym.n_numaux; i++)
2601 union internal_auxent *auxp;
2605 /* Look for a section aux entry here using the same tests that
2606 coff_swap_aux_out uses. */
2608 && (isym.n_sclass == C_STAT
2609 || isym.n_sclass == C_HIDDEN)
2610 && isym.n_type == T_NULL
2611 && (h->root.type == bfd_link_hash_defined
2612 || h->root.type == bfd_link_hash_defweak))
2616 sec = h->root.u.def.section->output_section;
2619 auxp->x_scn.x_scnlen = sec->size;
2621 /* For PE, an overflow on the final link reportedly does
2622 not matter. FIXME: Why not? */
2623 if (sec->reloc_count > 0xffff
2624 && (! obj_pe (output_bfd)
2625 || finfo->info->relocatable))
2626 (*_bfd_error_handler)
2627 (_("%s: %s: reloc overflow: 0x%lx > 0xffff"),
2628 bfd_get_filename (output_bfd),
2629 bfd_get_section_name (output_bfd, sec),
2632 if (sec->lineno_count > 0xffff
2633 && (! obj_pe (output_bfd)
2634 || finfo->info->relocatable))
2635 (*_bfd_error_handler)
2636 (_("%s: warning: %s: line number overflow: 0x%lx > 0xffff"),
2637 bfd_get_filename (output_bfd),
2638 bfd_get_section_name (output_bfd, sec),
2641 auxp->x_scn.x_nreloc = sec->reloc_count;
2642 auxp->x_scn.x_nlinno = sec->lineno_count;
2643 auxp->x_scn.x_checksum = 0;
2644 auxp->x_scn.x_associated = 0;
2645 auxp->x_scn.x_comdat = 0;
2649 bfd_coff_swap_aux_out (output_bfd, auxp, isym.n_type,
2650 isym.n_sclass, (int) i, isym.n_numaux,
2652 if (bfd_bwrite (finfo->outsyms, symesz, output_bfd) != symesz)
2654 finfo->failed = TRUE;
2657 ++obj_raw_syment_count (output_bfd);
2663 /* Write out task global symbols, converting them to statics. Called
2664 via coff_link_hash_traverse. Calls bfd_coff_write_global_sym to do
2665 the dirty work, if the symbol we are processing needs conversion. */
2668 _bfd_coff_write_task_globals (struct coff_link_hash_entry *h, void *data)
2670 struct coff_final_link_info *finfo = (struct coff_final_link_info *) data;
2671 bfd_boolean rtnval = TRUE;
2672 bfd_boolean save_global_to_static;
2674 if (h->root.type == bfd_link_hash_warning)
2675 h = (struct coff_link_hash_entry *) h->root.u.i.link;
2679 switch (h->root.type)
2681 case bfd_link_hash_defined:
2682 case bfd_link_hash_defweak:
2683 save_global_to_static = finfo->global_to_static;
2684 finfo->global_to_static = TRUE;
2685 rtnval = _bfd_coff_write_global_sym (h, data);
2686 finfo->global_to_static = save_global_to_static;
2695 /* Handle a link order which is supposed to generate a reloc. */
2698 _bfd_coff_reloc_link_order (bfd *output_bfd,
2699 struct coff_final_link_info *finfo,
2700 asection *output_section,
2701 struct bfd_link_order *link_order)
2703 reloc_howto_type *howto;
2704 struct internal_reloc *irel;
2705 struct coff_link_hash_entry **rel_hash_ptr;
2707 howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc);
2710 bfd_set_error (bfd_error_bad_value);
2714 if (link_order->u.reloc.p->addend != 0)
2718 bfd_reloc_status_type rstat;
2722 size = bfd_get_reloc_size (howto);
2723 buf = bfd_zmalloc (size);
2727 rstat = _bfd_relocate_contents (howto, output_bfd,
2728 (bfd_vma) link_order->u.reloc.p->addend,\
2735 case bfd_reloc_outofrange:
2737 case bfd_reloc_overflow:
2738 if (! ((*finfo->info->callbacks->reloc_overflow)
2740 (link_order->type == bfd_section_reloc_link_order
2741 ? bfd_section_name (output_bfd,
2742 link_order->u.reloc.p->u.section)
2743 : link_order->u.reloc.p->u.name),
2744 howto->name, link_order->u.reloc.p->addend,
2745 (bfd *) NULL, (asection *) NULL, (bfd_vma) 0)))
2752 loc = link_order->offset * bfd_octets_per_byte (output_bfd);
2753 ok = bfd_set_section_contents (output_bfd, output_section, buf,
2760 /* Store the reloc information in the right place. It will get
2761 swapped and written out at the end of the final_link routine. */
2762 irel = (finfo->section_info[output_section->target_index].relocs
2763 + output_section->reloc_count);
2764 rel_hash_ptr = (finfo->section_info[output_section->target_index].rel_hashes
2765 + output_section->reloc_count);
2767 memset (irel, 0, sizeof (struct internal_reloc));
2768 *rel_hash_ptr = NULL;
2770 irel->r_vaddr = output_section->vma + link_order->offset;
2772 if (link_order->type == bfd_section_reloc_link_order)
2774 /* We need to somehow locate a symbol in the right section. The
2775 symbol must either have a value of zero, or we must adjust
2776 the addend by the value of the symbol. FIXME: Write this
2777 when we need it. The old linker couldn't handle this anyhow. */
2779 *rel_hash_ptr = NULL;
2784 struct coff_link_hash_entry *h;
2786 h = ((struct coff_link_hash_entry *)
2787 bfd_wrapped_link_hash_lookup (output_bfd, finfo->info,
2788 link_order->u.reloc.p->u.name,
2789 FALSE, FALSE, TRUE));
2793 irel->r_symndx = h->indx;
2796 /* Set the index to -2 to force this symbol to get
2805 if (! ((*finfo->info->callbacks->unattached_reloc)
2806 (finfo->info, link_order->u.reloc.p->u.name, (bfd *) NULL,
2807 (asection *) NULL, (bfd_vma) 0)))
2813 /* FIXME: Is this always right? */
2814 irel->r_type = howto->type;
2816 /* r_size is only used on the RS/6000, which needs its own linker
2817 routines anyhow. r_extern is only used for ECOFF. */
2819 /* FIXME: What is the right value for r_offset? Is zero OK? */
2820 ++output_section->reloc_count;
2825 /* A basic reloc handling routine which may be used by processors with
2829 _bfd_coff_generic_relocate_section (bfd *output_bfd,
2830 struct bfd_link_info *info,
2832 asection *input_section,
2834 struct internal_reloc *relocs,
2835 struct internal_syment *syms,
2836 asection **sections)
2838 struct internal_reloc *rel;
2839 struct internal_reloc *relend;
2842 relend = rel + input_section->reloc_count;
2843 for (; rel < relend; rel++)
2846 struct coff_link_hash_entry *h;
2847 struct internal_syment *sym;
2850 reloc_howto_type *howto;
2851 bfd_reloc_status_type rstat;
2853 symndx = rel->r_symndx;
2861 || (unsigned long) symndx >= obj_raw_syment_count (input_bfd))
2863 (*_bfd_error_handler)
2864 ("%B: illegal symbol index %ld in relocs", input_bfd, symndx);
2869 h = obj_coff_sym_hashes (input_bfd)[symndx];
2870 sym = syms + symndx;
2873 /* COFF treats common symbols in one of two ways. Either the
2874 size of the symbol is included in the section contents, or it
2875 is not. We assume that the size is not included, and force
2876 the rtype_to_howto function to adjust the addend as needed. */
2877 if (sym != NULL && sym->n_scnum != 0)
2878 addend = - sym->n_value;
2882 howto = bfd_coff_rtype_to_howto (input_bfd, input_section, rel, h,
2887 /* If we are doing a relocatable link, then we can just ignore
2888 a PC relative reloc that is pcrel_offset. It will already
2889 have the correct value. If this is not a relocatable link,
2890 then we should ignore the symbol value. */
2891 if (howto->pc_relative && howto->pcrel_offset)
2893 if (info->relocatable)
2895 if (sym != NULL && sym->n_scnum != 0)
2896 addend += sym->n_value;
2907 sec = bfd_abs_section_ptr;
2912 sec = sections[symndx];
2913 val = (sec->output_section->vma
2914 + sec->output_offset
2916 if (! obj_pe (input_bfd))
2922 if (h->root.type == bfd_link_hash_defined
2923 || h->root.type == bfd_link_hash_defweak)
2925 /* Defined weak symbols are a GNU extension. */
2928 sec = h->root.u.def.section;
2929 val = (h->root.u.def.value
2930 + sec->output_section->vma
2931 + sec->output_offset);
2934 else if (h->root.type == bfd_link_hash_undefweak)
2936 if (h->class == C_NT_WEAK && h->numaux == 1)
2938 /* See _Microsoft Portable Executable and Common Object
2939 File Format Specification_, section 5.5.3.
2940 Note that weak symbols without aux records are a GNU
2942 FIXME: All weak externals are treated as having
2943 characteristic IMAGE_WEAK_EXTERN_SEARCH_NOLIBRARY (1).
2944 These behave as per SVR4 ABI: A library member
2945 will resolve a weak external only if a normal
2946 external causes the library member to be linked.
2947 See also linker.c: generic_link_check_archive_element. */
2949 struct coff_link_hash_entry *h2 =
2950 input_bfd->tdata.coff_obj_data->sym_hashes[
2951 h->aux->x_sym.x_tagndx.l];
2953 if (!h2 || h2->root.type == bfd_link_hash_undefined)
2955 sec = bfd_abs_section_ptr;
2960 sec = h2->root.u.def.section;
2961 val = h2->root.u.def.value
2962 + sec->output_section->vma + sec->output_offset;
2966 /* This is a GNU extension. */
2970 else if (! info->relocatable)
2972 if (! ((*info->callbacks->undefined_symbol)
2973 (info, h->root.root.string, input_bfd, input_section,
2974 rel->r_vaddr - input_section->vma, TRUE)))
2979 if (info->base_file)
2981 /* Emit a reloc if the backend thinks it needs it. */
2982 if (sym && pe_data (output_bfd)->in_reloc_p (output_bfd, howto))
2984 /* Relocation to a symbol in a section which isn't
2985 absolute. We output the address here to a file.
2986 This file is then read by dlltool when generating the
2987 reloc section. Note that the base file is not
2988 portable between systems. We write out a long here,
2989 and dlltool reads in a long. */
2990 long addr = (rel->r_vaddr
2991 - input_section->vma
2992 + input_section->output_offset
2993 + input_section->output_section->vma);
2994 if (coff_data (output_bfd)->pe)
2995 addr -= pe_data(output_bfd)->pe_opthdr.ImageBase;
2996 if (fwrite (&addr, 1, sizeof (long), (FILE *) info->base_file)
2999 bfd_set_error (bfd_error_system_call);
3005 rstat = _bfd_final_link_relocate (howto, input_bfd, input_section,
3007 rel->r_vaddr - input_section->vma,
3016 case bfd_reloc_outofrange:
3017 (*_bfd_error_handler)
3018 (_("%B: bad reloc address 0x%lx in section `%A'"),
3019 input_bfd, input_section, (unsigned long) rel->r_vaddr);
3021 case bfd_reloc_overflow:
3024 char buf[SYMNMLEN + 1];
3032 name = _bfd_coff_internal_syment_name (input_bfd, sym, buf);
3037 if (! ((*info->callbacks->reloc_overflow)
3038 (info, (h ? &h->root : NULL), name, howto->name,
3039 (bfd_vma) 0, input_bfd, input_section,
3040 rel->r_vaddr - input_section->vma)))