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. */
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 (bfd_get_flavour (info->output_bfd) == 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 && bfd_get_flavour (info->output_bfd) == 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);
1285 /* GNU extension for aligned commons. */
1286 else if (CONST_STRNEQ (s, "-aligncomm:"))
1288 /* Common symbols must be aligned on reading, as it
1289 is too late to do anything here, after they have
1290 already been allocated, so just skip the directive. */
1301 /* Place a marker against all symbols which are used by relocations.
1302 This marker can be picked up by the 'do we skip this symbol ?'
1303 loop in _bfd_coff_link_input_bfd() and used to prevent skipping
1307 mark_relocs (struct coff_final_link_info *finfo, bfd *input_bfd)
1311 if ((bfd_get_file_flags (input_bfd) & HAS_SYMS) == 0)
1314 for (a = input_bfd->sections; a != (asection *) NULL; a = a->next)
1316 struct internal_reloc * internal_relocs;
1317 struct internal_reloc * irel;
1318 struct internal_reloc * irelend;
1320 if ((a->flags & SEC_RELOC) == 0 || a->reloc_count < 1)
1322 /* Don't mark relocs in excluded sections. */
1323 if (a->output_section == bfd_abs_section_ptr)
1326 /* Read in the relocs. */
1327 internal_relocs = _bfd_coff_read_internal_relocs
1328 (input_bfd, a, FALSE,
1329 finfo->external_relocs,
1330 finfo->info->relocatable,
1331 (finfo->info->relocatable
1332 ? (finfo->section_info[ a->output_section->target_index ].relocs + a->output_section->reloc_count)
1333 : finfo->internal_relocs)
1336 if (internal_relocs == NULL)
1339 irel = internal_relocs;
1340 irelend = irel + a->reloc_count;
1342 /* Place a mark in the sym_indices array (whose entries have
1343 been initialised to 0) for all of the symbols that are used
1344 in the relocation table. This will then be picked up in the
1345 skip/don't-skip pass. */
1346 for (; irel < irelend; irel++)
1347 finfo->sym_indices[ irel->r_symndx ] = -1;
1351 /* Link an input file into the linker output file. This function
1352 handles all the sections and relocations of the input file at once. */
1355 _bfd_coff_link_input_bfd (struct coff_final_link_info *finfo, bfd *input_bfd)
1357 unsigned int n_tmask = coff_data (input_bfd)->local_n_tmask;
1358 unsigned int n_btshft = coff_data (input_bfd)->local_n_btshft;
1359 bfd_boolean (*adjust_symndx)
1360 (bfd *, struct bfd_link_info *, bfd *, asection *,
1361 struct internal_reloc *, bfd_boolean *);
1363 const char *strings;
1364 bfd_size_type syment_base;
1365 bfd_boolean copy, hash;
1366 bfd_size_type isymesz;
1367 bfd_size_type osymesz;
1368 bfd_size_type linesz;
1371 struct internal_syment *isymp;
1374 unsigned long output_index;
1376 struct coff_link_hash_entry **sym_hash;
1379 /* Move all the symbols to the output file. */
1381 output_bfd = finfo->output_bfd;
1383 syment_base = obj_raw_syment_count (output_bfd);
1384 isymesz = bfd_coff_symesz (input_bfd);
1385 osymesz = bfd_coff_symesz (output_bfd);
1386 linesz = bfd_coff_linesz (input_bfd);
1387 BFD_ASSERT (linesz == bfd_coff_linesz (output_bfd));
1390 if (! finfo->info->keep_memory)
1393 if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
1396 if (! _bfd_coff_get_external_symbols (input_bfd))
1399 esym = (bfd_byte *) obj_coff_external_syms (input_bfd);
1400 esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz;
1401 isymp = finfo->internal_syms;
1402 secpp = finfo->sec_ptrs;
1403 indexp = finfo->sym_indices;
1404 output_index = syment_base;
1405 outsym = finfo->outsyms;
1407 if (coff_data (output_bfd)->pe
1408 && ! process_embedded_commands (output_bfd, finfo->info, input_bfd))
1411 /* If we are going to perform relocations and also strip/discard some
1412 symbols then we must make sure that we do not strip/discard those
1413 symbols that are going to be involved in the relocations. */
1414 if (( finfo->info->strip != strip_none
1415 || finfo->info->discard != discard_none)
1416 && finfo->info->relocatable)
1418 /* Mark the symbol array as 'not-used'. */
1419 memset (indexp, 0, obj_raw_syment_count (input_bfd) * sizeof * indexp);
1421 mark_relocs (finfo, input_bfd);
1424 while (esym < esym_end)
1426 struct internal_syment isym;
1427 enum coff_symbol_classification classification;
1430 bfd_boolean dont_skip_symbol;
1433 bfd_coff_swap_sym_in (input_bfd, esym, isymp);
1435 /* Make a copy of *isymp so that the relocate_section function
1436 always sees the original values. This is more reliable than
1437 always recomputing the symbol value even if we are stripping
1441 classification = bfd_coff_classify_symbol (input_bfd, &isym);
1442 switch (classification)
1446 case COFF_SYMBOL_GLOBAL:
1447 case COFF_SYMBOL_PE_SECTION:
1448 case COFF_SYMBOL_LOCAL:
1449 *secpp = coff_section_from_bfd_index (input_bfd, isym.n_scnum);
1451 case COFF_SYMBOL_COMMON:
1452 *secpp = bfd_com_section_ptr;
1454 case COFF_SYMBOL_UNDEFINED:
1455 *secpp = bfd_und_section_ptr;
1459 /* Extract the flag indicating if this symbol is used by a
1461 if ((finfo->info->strip != strip_none
1462 || finfo->info->discard != discard_none)
1463 && finfo->info->relocatable)
1464 dont_skip_symbol = *indexp;
1466 dont_skip_symbol = FALSE;
1472 add = 1 + isym.n_numaux;
1474 /* If we are stripping all symbols, we want to skip this one. */
1475 if (finfo->info->strip == strip_all && ! dont_skip_symbol)
1480 switch (classification)
1484 case COFF_SYMBOL_GLOBAL:
1485 case COFF_SYMBOL_COMMON:
1486 case COFF_SYMBOL_PE_SECTION:
1487 /* This is a global symbol. Global symbols come at the
1488 end of the symbol table, so skip them for now.
1489 Locally defined function symbols, however, are an
1490 exception, and are not moved to the end. */
1492 if (! ISFCN (isym.n_type))
1496 case COFF_SYMBOL_UNDEFINED:
1497 /* Undefined symbols are left for the end. */
1502 case COFF_SYMBOL_LOCAL:
1503 /* This is a local symbol. Skip it if we are discarding
1505 if (finfo->info->discard == discard_all && ! dont_skip_symbol)
1511 #ifndef COFF_WITH_PE
1512 /* Skip section symbols for sections which are not going to be
1515 && dont_skip_symbol == 0
1516 && isym.n_sclass == C_STAT
1517 && isym.n_type == T_NULL
1518 && isym.n_numaux > 0
1519 && (*secpp)->output_section == bfd_abs_section_ptr)
1523 /* If we stripping debugging symbols, and this is a debugging
1524 symbol, then skip it. FIXME: gas sets the section to N_ABS
1525 for some types of debugging symbols; I don't know if this is
1526 a bug or not. In any case, we handle it here. */
1528 && finfo->info->strip == strip_debugger
1529 && ! dont_skip_symbol
1530 && (isym.n_scnum == N_DEBUG
1531 || (isym.n_scnum == N_ABS
1532 && (isym.n_sclass == C_AUTO
1533 || isym.n_sclass == C_REG
1534 || isym.n_sclass == C_MOS
1535 || isym.n_sclass == C_MOE
1536 || isym.n_sclass == C_MOU
1537 || isym.n_sclass == C_ARG
1538 || isym.n_sclass == C_REGPARM
1539 || isym.n_sclass == C_FIELD
1540 || isym.n_sclass == C_EOS))))
1543 /* If some symbols are stripped based on the name, work out the
1544 name and decide whether to skip this symbol. */
1546 && (finfo->info->strip == strip_some
1547 || finfo->info->discard == discard_l))
1550 char buf[SYMNMLEN + 1];
1552 name = _bfd_coff_internal_syment_name (input_bfd, &isym, buf);
1556 if (! dont_skip_symbol
1557 && ((finfo->info->strip == strip_some
1558 && (bfd_hash_lookup (finfo->info->keep_hash, name, FALSE,
1561 && finfo->info->discard == discard_l
1562 && bfd_is_local_label_name (input_bfd, name))))
1566 /* If this is an enum, struct, or union tag, see if we have
1567 already output an identical type. */
1569 && (finfo->output_bfd->flags & BFD_TRADITIONAL_FORMAT) == 0
1570 && (isym.n_sclass == C_ENTAG
1571 || isym.n_sclass == C_STRTAG
1572 || isym.n_sclass == C_UNTAG)
1573 && isym.n_numaux == 1)
1576 char buf[SYMNMLEN + 1];
1577 struct coff_debug_merge_hash_entry *mh;
1578 struct coff_debug_merge_type *mt;
1579 union internal_auxent aux;
1580 struct coff_debug_merge_element **epp;
1581 bfd_byte *esl, *eslend;
1582 struct internal_syment *islp;
1585 name = _bfd_coff_internal_syment_name (input_bfd, &isym, buf);
1589 /* Ignore fake names invented by compiler; treat them all as
1591 if (*name == '~' || *name == '.' || *name == '$'
1592 || (*name == bfd_get_symbol_leading_char (input_bfd)
1593 && (name[1] == '~' || name[1] == '.' || name[1] == '$')))
1596 mh = coff_debug_merge_hash_lookup (&finfo->debug_merge, name,
1601 /* Allocate memory to hold type information. If this turns
1602 out to be a duplicate, we pass this address to
1604 amt = sizeof (struct coff_debug_merge_type);
1605 mt = bfd_alloc (input_bfd, amt);
1608 mt->class = isym.n_sclass;
1610 /* Pick up the aux entry, which points to the end of the tag
1612 bfd_coff_swap_aux_in (input_bfd, (esym + isymesz),
1613 isym.n_type, isym.n_sclass, 0, isym.n_numaux,
1616 /* Gather the elements. */
1617 epp = &mt->elements;
1618 mt->elements = NULL;
1620 esl = esym + 2 * isymesz;
1621 eslend = ((bfd_byte *) obj_coff_external_syms (input_bfd)
1622 + aux.x_sym.x_fcnary.x_fcn.x_endndx.l * isymesz);
1623 while (esl < eslend)
1625 const char *elename;
1626 char elebuf[SYMNMLEN + 1];
1629 bfd_coff_swap_sym_in (input_bfd, esl, islp);
1631 amt = sizeof (struct coff_debug_merge_element);
1632 *epp = bfd_alloc (input_bfd, amt);
1636 elename = _bfd_coff_internal_syment_name (input_bfd, islp,
1638 if (elename == NULL)
1641 amt = strlen (elename) + 1;
1642 name_copy = bfd_alloc (input_bfd, amt);
1643 if (name_copy == NULL)
1645 strcpy (name_copy, elename);
1647 (*epp)->name = name_copy;
1648 (*epp)->type = islp->n_type;
1650 if (islp->n_numaux >= 1
1651 && islp->n_type != T_NULL
1652 && islp->n_sclass != C_EOS)
1654 union internal_auxent eleaux;
1657 bfd_coff_swap_aux_in (input_bfd, (esl + isymesz),
1658 islp->n_type, islp->n_sclass, 0,
1659 islp->n_numaux, &eleaux);
1660 indx = eleaux.x_sym.x_tagndx.l;
1662 /* FIXME: If this tagndx entry refers to a symbol
1663 defined later in this file, we just ignore it.
1664 Handling this correctly would be tedious, and may
1669 (bfd_byte *) obj_coff_external_syms (input_bfd))
1672 (*epp)->tagndx = finfo->sym_indices[indx];
1673 if ((*epp)->tagndx < 0)
1677 epp = &(*epp)->next;
1680 esl += (islp->n_numaux + 1) * isymesz;
1681 islp += islp->n_numaux + 1;
1684 /* See if we already have a definition which matches this
1685 type. We always output the type if it has no elements,
1687 if (mt->elements == NULL)
1688 bfd_release (input_bfd, mt);
1691 struct coff_debug_merge_type *mtl;
1693 for (mtl = mh->types; mtl != NULL; mtl = mtl->next)
1695 struct coff_debug_merge_element *me, *mel;
1697 if (mtl->class != mt->class)
1700 for (me = mt->elements, mel = mtl->elements;
1701 me != NULL && mel != NULL;
1702 me = me->next, mel = mel->next)
1704 if (strcmp (me->name, mel->name) != 0
1705 || me->type != mel->type
1706 || me->tagndx != mel->tagndx)
1710 if (me == NULL && mel == NULL)
1714 if (mtl == NULL || (bfd_size_type) mtl->indx >= syment_base)
1716 /* This is the first definition of this type. */
1717 mt->indx = output_index;
1718 mt->next = mh->types;
1723 /* This is a redefinition which can be merged. */
1724 bfd_release (input_bfd, mt);
1725 *indexp = mtl->indx;
1726 add = (eslend - esym) / isymesz;
1732 /* We now know whether we are to skip this symbol or not. */
1735 /* Adjust the symbol in order to output it. */
1737 if (isym._n._n_n._n_zeroes == 0
1738 && isym._n._n_n._n_offset != 0)
1743 /* This symbol has a long name. Enter it in the string
1744 table we are building. Note that we do not check
1745 bfd_coff_symname_in_debug. That is only true for
1746 XCOFF, and XCOFF requires different linking code
1748 name = _bfd_coff_internal_syment_name (input_bfd, &isym, NULL);
1751 indx = _bfd_stringtab_add (finfo->strtab, name, hash, copy);
1752 if (indx == (bfd_size_type) -1)
1754 isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx;
1757 switch (isym.n_sclass)
1773 /* The symbol value should not be modified. */
1777 if (obj_pe (input_bfd)
1778 && strcmp (isym.n_name, ".bf") != 0
1779 && isym.n_scnum > 0)
1781 /* For PE, .lf and .ef get their value left alone,
1782 while .bf gets relocated. However, they all have
1783 "real" section numbers, and need to be moved into
1785 isym.n_scnum = (*secpp)->output_section->target_index;
1790 case C_LABEL: /* Not completely sure about these 2 */
1799 /* Compute new symbol location. */
1800 if (isym.n_scnum > 0)
1802 isym.n_scnum = (*secpp)->output_section->target_index;
1803 isym.n_value += (*secpp)->output_offset;
1804 if (! obj_pe (input_bfd))
1805 isym.n_value -= (*secpp)->vma;
1806 if (! obj_pe (finfo->output_bfd))
1807 isym.n_value += (*secpp)->output_section->vma;
1812 /* The value of a C_FILE symbol is the symbol index of
1813 the next C_FILE symbol. The value of the last C_FILE
1814 symbol is the symbol index to the first external
1815 symbol (actually, coff_renumber_symbols does not get
1816 this right--it just sets the value of the last C_FILE
1817 symbol to zero--and nobody has ever complained about
1818 it). We try to get this right, below, just before we
1819 write the symbols out, but in the general case we may
1820 have to write the symbol out twice. */
1821 if (finfo->last_file_index != -1
1822 && finfo->last_file.n_value != (bfd_vma) output_index)
1824 /* We must correct the value of the last C_FILE
1826 finfo->last_file.n_value = output_index;
1827 if ((bfd_size_type) finfo->last_file_index >= syment_base)
1829 /* The last C_FILE symbol is in this input file. */
1830 bfd_coff_swap_sym_out (output_bfd,
1833 + ((finfo->last_file_index
1841 /* We have already written out the last C_FILE
1842 symbol. We need to write it out again. We
1843 borrow *outsym temporarily. */
1844 bfd_coff_swap_sym_out (output_bfd,
1845 &finfo->last_file, outsym);
1846 pos = obj_sym_filepos (output_bfd);
1847 pos += finfo->last_file_index * osymesz;
1848 if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
1849 || bfd_bwrite (outsym, osymesz, output_bfd) != osymesz)
1854 finfo->last_file_index = output_index;
1855 finfo->last_file = isym;
1859 /* If doing task linking, convert normal global function symbols to
1860 static functions. */
1861 if (finfo->info->task_link && IS_EXTERNAL (input_bfd, isym))
1862 isym.n_sclass = C_STAT;
1864 /* Output the symbol. */
1865 bfd_coff_swap_sym_out (output_bfd, &isym, outsym);
1867 *indexp = output_index;
1872 struct coff_link_hash_entry *h;
1874 indx = ((esym - (bfd_byte *) obj_coff_external_syms (input_bfd))
1876 h = obj_coff_sym_hashes (input_bfd)[indx];
1879 /* This can happen if there were errors earlier in
1881 bfd_set_error (bfd_error_bad_value);
1884 h->indx = output_index;
1887 output_index += add;
1888 outsym += add * osymesz;
1891 esym += add * isymesz;
1895 for (--add; add > 0; --add)
1902 /* Fix up the aux entries. This must be done in a separate pass,
1903 because we don't know the correct symbol indices until we have
1904 already decided which symbols we are going to keep. */
1905 esym = (bfd_byte *) obj_coff_external_syms (input_bfd);
1906 esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz;
1907 isymp = finfo->internal_syms;
1908 indexp = finfo->sym_indices;
1909 sym_hash = obj_coff_sym_hashes (input_bfd);
1910 outsym = finfo->outsyms;
1912 while (esym < esym_end)
1916 add = 1 + isymp->n_numaux;
1919 || (bfd_size_type) *indexp < syment_base)
1920 && (*sym_hash == NULL
1921 || (*sym_hash)->auxbfd != input_bfd))
1922 esym += add * isymesz;
1925 struct coff_link_hash_entry *h;
1933 /* The m68k-motorola-sysv assembler will sometimes
1934 generate two symbols with the same name, but only one
1935 will have aux entries. */
1936 BFD_ASSERT (isymp->n_numaux == 0
1938 || h->numaux == isymp->n_numaux);
1946 /* Handle the aux entries. This handling is based on
1947 coff_pointerize_aux. I don't know if it always correct. */
1948 for (i = 0; i < isymp->n_numaux && esym < esym_end; i++)
1950 union internal_auxent aux;
1951 union internal_auxent *auxp;
1953 if (h != NULL && h->aux != NULL && (h->numaux > i))
1957 bfd_coff_swap_aux_in (input_bfd, esym, isymp->n_type,
1958 isymp->n_sclass, i, isymp->n_numaux, &aux);
1962 if (isymp->n_sclass == C_FILE)
1964 /* If this is a long filename, we must put it in the
1966 if (auxp->x_file.x_n.x_zeroes == 0
1967 && auxp->x_file.x_n.x_offset != 0)
1969 const char *filename;
1972 BFD_ASSERT (auxp->x_file.x_n.x_offset
1973 >= STRING_SIZE_SIZE);
1974 if (strings == NULL)
1976 strings = _bfd_coff_read_string_table (input_bfd);
1977 if (strings == NULL)
1980 filename = strings + auxp->x_file.x_n.x_offset;
1981 indx = _bfd_stringtab_add (finfo->strtab, filename,
1983 if (indx == (bfd_size_type) -1)
1985 auxp->x_file.x_n.x_offset = STRING_SIZE_SIZE + indx;
1988 else if ((isymp->n_sclass != C_STAT || isymp->n_type != T_NULL)
1989 && isymp->n_sclass != C_NT_WEAK)
1993 if (ISFCN (isymp->n_type)
1994 || ISTAG (isymp->n_sclass)
1995 || isymp->n_sclass == C_BLOCK
1996 || isymp->n_sclass == C_FCN)
1998 indx = auxp->x_sym.x_fcnary.x_fcn.x_endndx.l;
2000 && indx < obj_raw_syment_count (input_bfd))
2002 /* We look forward through the symbol for
2003 the index of the next symbol we are going
2004 to include. I don't know if this is
2006 while ((finfo->sym_indices[indx] < 0
2007 || ((bfd_size_type) finfo->sym_indices[indx]
2009 && indx < obj_raw_syment_count (input_bfd))
2011 if (indx >= obj_raw_syment_count (input_bfd))
2012 indx = output_index;
2014 indx = finfo->sym_indices[indx];
2015 auxp->x_sym.x_fcnary.x_fcn.x_endndx.l = indx;
2019 indx = auxp->x_sym.x_tagndx.l;
2020 if (indx > 0 && indx < obj_raw_syment_count (input_bfd))
2024 symindx = finfo->sym_indices[indx];
2026 auxp->x_sym.x_tagndx.l = 0;
2028 auxp->x_sym.x_tagndx.l = symindx;
2031 /* The .bf symbols are supposed to be linked through
2032 the endndx field. We need to carry this list
2033 across object files. */
2036 && isymp->n_sclass == C_FCN
2037 && (isymp->_n._n_n._n_zeroes != 0
2038 || isymp->_n._n_n._n_offset == 0)
2039 && isymp->_n._n_name[0] == '.'
2040 && isymp->_n._n_name[1] == 'b'
2041 && isymp->_n._n_name[2] == 'f'
2042 && isymp->_n._n_name[3] == '\0')
2044 if (finfo->last_bf_index != -1)
2046 finfo->last_bf.x_sym.x_fcnary.x_fcn.x_endndx.l =
2049 if ((bfd_size_type) finfo->last_bf_index
2054 /* The last .bf symbol is in this input
2055 file. This will only happen if the
2056 assembler did not set up the .bf
2057 endndx symbols correctly. */
2058 auxout = (finfo->outsyms
2059 + ((finfo->last_bf_index
2063 bfd_coff_swap_aux_out (output_bfd,
2074 /* We have already written out the last
2075 .bf aux entry. We need to write it
2076 out again. We borrow *outsym
2077 temporarily. FIXME: This case should
2079 bfd_coff_swap_aux_out (output_bfd,
2085 pos = obj_sym_filepos (output_bfd);
2086 pos += finfo->last_bf_index * osymesz;
2087 if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
2088 || (bfd_bwrite (outsym, osymesz, output_bfd)
2094 if (auxp->x_sym.x_fcnary.x_fcn.x_endndx.l != 0)
2095 finfo->last_bf_index = -1;
2098 /* The endndx field of this aux entry must
2099 be updated with the symbol number of the
2101 finfo->last_bf = *auxp;
2102 finfo->last_bf_index = (((outsym - finfo->outsyms)
2111 bfd_coff_swap_aux_out (output_bfd, auxp, isymp->n_type,
2112 isymp->n_sclass, i, isymp->n_numaux,
2126 /* Relocate the line numbers, unless we are stripping them. */
2127 if (finfo->info->strip == strip_none
2128 || finfo->info->strip == strip_some)
2130 for (o = input_bfd->sections; o != NULL; o = o->next)
2136 bfd_boolean skipping;
2140 /* FIXME: If SEC_HAS_CONTENTS is not for the section, then
2141 build_link_order in ldwrite.c will not have created a
2142 link order, which means that we will not have seen this
2143 input section in _bfd_coff_final_link, which means that
2144 we will not have allocated space for the line numbers of
2145 this section. I don't think line numbers can be
2146 meaningful for a section which does not have
2147 SEC_HAS_CONTENTS set, but, if they do, this must be
2149 if (o->lineno_count == 0
2150 || (o->output_section->flags & SEC_HAS_CONTENTS) == 0)
2153 if (bfd_seek (input_bfd, o->line_filepos, SEEK_SET) != 0
2154 || bfd_bread (finfo->linenos, linesz * o->lineno_count,
2155 input_bfd) != linesz * o->lineno_count)
2158 offset = o->output_section->vma + o->output_offset - o->vma;
2159 eline = finfo->linenos;
2160 oeline = finfo->linenos;
2161 elineend = eline + linesz * o->lineno_count;
2163 for (; eline < elineend; eline += linesz)
2165 struct internal_lineno iline;
2167 bfd_coff_swap_lineno_in (input_bfd, eline, &iline);
2169 if (iline.l_lnno != 0)
2170 iline.l_addr.l_paddr += offset;
2171 else if (iline.l_addr.l_symndx >= 0
2172 && ((unsigned long) iline.l_addr.l_symndx
2173 < obj_raw_syment_count (input_bfd)))
2177 indx = finfo->sym_indices[iline.l_addr.l_symndx];
2181 /* These line numbers are attached to a symbol
2182 which we are stripping. We must discard the
2183 line numbers because reading them back with
2184 no associated symbol (or associating them all
2185 with symbol #0) will fail. We can't regain
2186 the space in the output file, but at least
2192 struct internal_syment is;
2193 union internal_auxent ia;
2195 /* Fix up the lnnoptr field in the aux entry of
2196 the symbol. It turns out that we can't do
2197 this when we modify the symbol aux entries,
2198 because gas sometimes screws up the lnnoptr
2199 field and makes it an offset from the start
2200 of the line numbers rather than an absolute
2202 bfd_coff_swap_sym_in (output_bfd,
2204 + ((indx - syment_base)
2206 if ((ISFCN (is.n_type)
2207 || is.n_sclass == C_BLOCK)
2208 && is.n_numaux >= 1)
2212 auxptr = (finfo->outsyms
2213 + ((indx - syment_base + 1)
2215 bfd_coff_swap_aux_in (output_bfd, auxptr,
2216 is.n_type, is.n_sclass,
2217 0, is.n_numaux, &ia);
2218 ia.x_sym.x_fcnary.x_fcn.x_lnnoptr =
2219 (o->output_section->line_filepos
2220 + o->output_section->lineno_count * linesz
2221 + eline - finfo->linenos);
2222 bfd_coff_swap_aux_out (output_bfd, &ia,
2223 is.n_type, is.n_sclass, 0,
2224 is.n_numaux, auxptr);
2230 iline.l_addr.l_symndx = indx;
2235 bfd_coff_swap_lineno_out (output_bfd, &iline, oeline);
2240 pos = o->output_section->line_filepos;
2241 pos += o->output_section->lineno_count * linesz;
2242 amt = oeline - finfo->linenos;
2243 if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
2244 || bfd_bwrite (finfo->linenos, amt, output_bfd) != amt)
2247 o->output_section->lineno_count += amt / linesz;
2251 /* If we swapped out a C_FILE symbol, guess that the next C_FILE
2252 symbol will be the first symbol in the next input file. In the
2253 normal case, this will save us from writing out the C_FILE symbol
2255 if (finfo->last_file_index != -1
2256 && (bfd_size_type) finfo->last_file_index >= syment_base)
2258 finfo->last_file.n_value = output_index;
2259 bfd_coff_swap_sym_out (output_bfd, &finfo->last_file,
2261 + ((finfo->last_file_index - syment_base)
2265 /* Write the modified symbols to the output file. */
2266 if (outsym > finfo->outsyms)
2271 pos = obj_sym_filepos (output_bfd) + syment_base * osymesz;
2272 amt = outsym - finfo->outsyms;
2273 if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
2274 || bfd_bwrite (finfo->outsyms, amt, output_bfd) != amt)
2277 BFD_ASSERT ((obj_raw_syment_count (output_bfd)
2278 + (outsym - finfo->outsyms) / osymesz)
2281 obj_raw_syment_count (output_bfd) = output_index;
2284 /* Relocate the contents of each section. */
2285 adjust_symndx = coff_backend_info (input_bfd)->_bfd_coff_adjust_symndx;
2286 for (o = input_bfd->sections; o != NULL; o = o->next)
2289 struct coff_section_tdata *secdata;
2291 if (! o->linker_mark)
2292 /* This section was omitted from the link. */
2295 if ((o->flags & SEC_LINKER_CREATED) != 0)
2298 if ((o->flags & SEC_HAS_CONTENTS) == 0
2299 || (o->size == 0 && (o->flags & SEC_RELOC) == 0))
2301 if ((o->flags & SEC_RELOC) != 0
2302 && o->reloc_count != 0)
2304 (*_bfd_error_handler)
2305 (_("%B: relocs in section `%A', but it has no contents"),
2307 bfd_set_error (bfd_error_no_contents);
2314 secdata = coff_section_data (input_bfd, o);
2315 if (secdata != NULL && secdata->contents != NULL)
2316 contents = secdata->contents;
2319 bfd_size_type x = o->rawsize ? o->rawsize : o->size;
2320 if (! bfd_get_section_contents (input_bfd, o, finfo->contents, 0, x))
2322 contents = finfo->contents;
2325 if ((o->flags & SEC_RELOC) != 0)
2328 struct internal_reloc *internal_relocs;
2329 struct internal_reloc *irel;
2331 /* Read in the relocs. */
2332 target_index = o->output_section->target_index;
2333 internal_relocs = (_bfd_coff_read_internal_relocs
2334 (input_bfd, o, FALSE, finfo->external_relocs,
2335 finfo->info->relocatable,
2336 (finfo->info->relocatable
2337 ? (finfo->section_info[target_index].relocs
2338 + o->output_section->reloc_count)
2339 : finfo->internal_relocs)));
2340 if (internal_relocs == NULL)
2343 /* Call processor specific code to relocate the section
2345 if (! bfd_coff_relocate_section (output_bfd, finfo->info,
2349 finfo->internal_syms,
2353 if (finfo->info->relocatable)
2356 struct internal_reloc *irelend;
2357 struct coff_link_hash_entry **rel_hash;
2359 offset = o->output_section->vma + o->output_offset - o->vma;
2360 irel = internal_relocs;
2361 irelend = irel + o->reloc_count;
2362 rel_hash = (finfo->section_info[target_index].rel_hashes
2363 + o->output_section->reloc_count);
2364 for (; irel < irelend; irel++, rel_hash++)
2366 struct coff_link_hash_entry *h;
2367 bfd_boolean adjusted;
2371 /* Adjust the reloc address and symbol index. */
2372 irel->r_vaddr += offset;
2374 if (irel->r_symndx == -1)
2379 if (! (*adjust_symndx) (output_bfd, finfo->info,
2387 h = obj_coff_sym_hashes (input_bfd)[irel->r_symndx];
2390 /* This is a global symbol. */
2392 irel->r_symndx = h->indx;
2395 /* This symbol is being written at the end
2396 of the file, and we do not yet know the
2397 symbol index. We save the pointer to the
2398 hash table entry in the rel_hash list.
2399 We set the indx field to -2 to indicate
2400 that this symbol must not be stripped. */
2409 indx = finfo->sym_indices[irel->r_symndx];
2411 irel->r_symndx = indx;
2414 struct internal_syment *is;
2416 char buf[SYMNMLEN + 1];
2418 /* This reloc is against a symbol we are
2419 stripping. This should have been handled
2420 by the 'dont_skip_symbol' code in the while
2421 loop at the top of this function. */
2422 is = finfo->internal_syms + irel->r_symndx;
2424 name = (_bfd_coff_internal_syment_name
2425 (input_bfd, is, buf));
2429 if (! ((*finfo->info->callbacks->unattached_reloc)
2430 (finfo->info, name, input_bfd, o,
2437 o->output_section->reloc_count += o->reloc_count;
2441 /* Write out the modified section contents. */
2442 if (secdata == NULL || secdata->stab_info == NULL)
2444 file_ptr loc = o->output_offset * bfd_octets_per_byte (output_bfd);
2445 if (! bfd_set_section_contents (output_bfd, o->output_section,
2446 contents, loc, o->size))
2451 if (! (_bfd_write_section_stabs
2452 (output_bfd, &coff_hash_table (finfo->info)->stab_info,
2453 o, &secdata->stab_info, contents)))
2458 if (! finfo->info->keep_memory
2459 && ! _bfd_coff_free_symbols (input_bfd))
2465 /* Write out a global symbol. Called via coff_link_hash_traverse. */
2468 _bfd_coff_write_global_sym (struct coff_link_hash_entry *h, void *data)
2470 struct coff_final_link_info *finfo = (struct coff_final_link_info *) data;
2472 struct internal_syment isym;
2473 bfd_size_type symesz;
2477 output_bfd = finfo->output_bfd;
2479 if (h->root.type == bfd_link_hash_warning)
2481 h = (struct coff_link_hash_entry *) h->root.u.i.link;
2482 if (h->root.type == bfd_link_hash_new)
2490 && (finfo->info->strip == strip_all
2491 || (finfo->info->strip == strip_some
2492 && (bfd_hash_lookup (finfo->info->keep_hash,
2493 h->root.root.string, FALSE, FALSE)
2497 switch (h->root.type)
2500 case bfd_link_hash_new:
2501 case bfd_link_hash_warning:
2505 case bfd_link_hash_undefined:
2506 case bfd_link_hash_undefweak:
2507 isym.n_scnum = N_UNDEF;
2511 case bfd_link_hash_defined:
2512 case bfd_link_hash_defweak:
2516 sec = h->root.u.def.section->output_section;
2517 if (bfd_is_abs_section (sec))
2518 isym.n_scnum = N_ABS;
2520 isym.n_scnum = sec->target_index;
2521 isym.n_value = (h->root.u.def.value
2522 + h->root.u.def.section->output_offset);
2523 if (! obj_pe (finfo->output_bfd))
2524 isym.n_value += sec->vma;
2528 case bfd_link_hash_common:
2529 isym.n_scnum = N_UNDEF;
2530 isym.n_value = h->root.u.c.size;
2533 case bfd_link_hash_indirect:
2534 /* Just ignore these. They can't be handled anyhow. */
2538 if (strlen (h->root.root.string) <= SYMNMLEN)
2539 strncpy (isym._n._n_name, h->root.root.string, SYMNMLEN);
2546 if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
2548 indx = _bfd_stringtab_add (finfo->strtab, h->root.root.string, hash,
2550 if (indx == (bfd_size_type) -1)
2552 finfo->failed = TRUE;
2555 isym._n._n_n._n_zeroes = 0;
2556 isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx;
2559 isym.n_sclass = h->class;
2560 isym.n_type = h->type;
2562 if (isym.n_sclass == C_NULL)
2563 isym.n_sclass = C_EXT;
2565 /* If doing task linking and this is the pass where we convert
2566 defined globals to statics, then do that conversion now. If the
2567 symbol is not being converted, just ignore it and it will be
2568 output during a later pass. */
2569 if (finfo->global_to_static)
2571 if (! IS_EXTERNAL (output_bfd, isym))
2574 isym.n_sclass = C_STAT;
2577 /* When a weak symbol is not overridden by a strong one,
2578 turn it into an external symbol when not building a
2579 shared or relocatable object. */
2580 if (! finfo->info->shared
2581 && ! finfo->info->relocatable
2582 && IS_WEAK_EXTERNAL (finfo->output_bfd, isym))
2583 isym.n_sclass = C_EXT;
2585 isym.n_numaux = h->numaux;
2587 bfd_coff_swap_sym_out (output_bfd, &isym, finfo->outsyms);
2589 symesz = bfd_coff_symesz (output_bfd);
2591 pos = obj_sym_filepos (output_bfd);
2592 pos += obj_raw_syment_count (output_bfd) * symesz;
2593 if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
2594 || bfd_bwrite (finfo->outsyms, symesz, output_bfd) != symesz)
2596 finfo->failed = TRUE;
2600 h->indx = obj_raw_syment_count (output_bfd);
2602 ++obj_raw_syment_count (output_bfd);
2604 /* Write out any associated aux entries. Most of the aux entries
2605 will have been modified in _bfd_coff_link_input_bfd. We have to
2606 handle section aux entries here, now that we have the final
2607 relocation and line number counts. */
2608 for (i = 0; i < isym.n_numaux; i++)
2610 union internal_auxent *auxp;
2614 /* Look for a section aux entry here using the same tests that
2615 coff_swap_aux_out uses. */
2617 && (isym.n_sclass == C_STAT
2618 || isym.n_sclass == C_HIDDEN)
2619 && isym.n_type == T_NULL
2620 && (h->root.type == bfd_link_hash_defined
2621 || h->root.type == bfd_link_hash_defweak))
2625 sec = h->root.u.def.section->output_section;
2628 auxp->x_scn.x_scnlen = sec->size;
2630 /* For PE, an overflow on the final link reportedly does
2631 not matter. FIXME: Why not? */
2632 if (sec->reloc_count > 0xffff
2633 && (! obj_pe (output_bfd)
2634 || finfo->info->relocatable))
2635 (*_bfd_error_handler)
2636 (_("%s: %s: reloc overflow: 0x%lx > 0xffff"),
2637 bfd_get_filename (output_bfd),
2638 bfd_get_section_name (output_bfd, sec),
2641 if (sec->lineno_count > 0xffff
2642 && (! obj_pe (output_bfd)
2643 || finfo->info->relocatable))
2644 (*_bfd_error_handler)
2645 (_("%s: warning: %s: line number overflow: 0x%lx > 0xffff"),
2646 bfd_get_filename (output_bfd),
2647 bfd_get_section_name (output_bfd, sec),
2650 auxp->x_scn.x_nreloc = sec->reloc_count;
2651 auxp->x_scn.x_nlinno = sec->lineno_count;
2652 auxp->x_scn.x_checksum = 0;
2653 auxp->x_scn.x_associated = 0;
2654 auxp->x_scn.x_comdat = 0;
2658 bfd_coff_swap_aux_out (output_bfd, auxp, isym.n_type,
2659 isym.n_sclass, (int) i, isym.n_numaux,
2661 if (bfd_bwrite (finfo->outsyms, symesz, output_bfd) != symesz)
2663 finfo->failed = TRUE;
2666 ++obj_raw_syment_count (output_bfd);
2672 /* Write out task global symbols, converting them to statics. Called
2673 via coff_link_hash_traverse. Calls bfd_coff_write_global_sym to do
2674 the dirty work, if the symbol we are processing needs conversion. */
2677 _bfd_coff_write_task_globals (struct coff_link_hash_entry *h, void *data)
2679 struct coff_final_link_info *finfo = (struct coff_final_link_info *) data;
2680 bfd_boolean rtnval = TRUE;
2681 bfd_boolean save_global_to_static;
2683 if (h->root.type == bfd_link_hash_warning)
2684 h = (struct coff_link_hash_entry *) h->root.u.i.link;
2688 switch (h->root.type)
2690 case bfd_link_hash_defined:
2691 case bfd_link_hash_defweak:
2692 save_global_to_static = finfo->global_to_static;
2693 finfo->global_to_static = TRUE;
2694 rtnval = _bfd_coff_write_global_sym (h, data);
2695 finfo->global_to_static = save_global_to_static;
2704 /* Handle a link order which is supposed to generate a reloc. */
2707 _bfd_coff_reloc_link_order (bfd *output_bfd,
2708 struct coff_final_link_info *finfo,
2709 asection *output_section,
2710 struct bfd_link_order *link_order)
2712 reloc_howto_type *howto;
2713 struct internal_reloc *irel;
2714 struct coff_link_hash_entry **rel_hash_ptr;
2716 howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc);
2719 bfd_set_error (bfd_error_bad_value);
2723 if (link_order->u.reloc.p->addend != 0)
2727 bfd_reloc_status_type rstat;
2731 size = bfd_get_reloc_size (howto);
2732 buf = bfd_zmalloc (size);
2736 rstat = _bfd_relocate_contents (howto, output_bfd,
2737 (bfd_vma) link_order->u.reloc.p->addend,\
2744 case bfd_reloc_outofrange:
2746 case bfd_reloc_overflow:
2747 if (! ((*finfo->info->callbacks->reloc_overflow)
2749 (link_order->type == bfd_section_reloc_link_order
2750 ? bfd_section_name (output_bfd,
2751 link_order->u.reloc.p->u.section)
2752 : link_order->u.reloc.p->u.name),
2753 howto->name, link_order->u.reloc.p->addend,
2754 (bfd *) NULL, (asection *) NULL, (bfd_vma) 0)))
2761 loc = link_order->offset * bfd_octets_per_byte (output_bfd);
2762 ok = bfd_set_section_contents (output_bfd, output_section, buf,
2769 /* Store the reloc information in the right place. It will get
2770 swapped and written out at the end of the final_link routine. */
2771 irel = (finfo->section_info[output_section->target_index].relocs
2772 + output_section->reloc_count);
2773 rel_hash_ptr = (finfo->section_info[output_section->target_index].rel_hashes
2774 + output_section->reloc_count);
2776 memset (irel, 0, sizeof (struct internal_reloc));
2777 *rel_hash_ptr = NULL;
2779 irel->r_vaddr = output_section->vma + link_order->offset;
2781 if (link_order->type == bfd_section_reloc_link_order)
2783 /* We need to somehow locate a symbol in the right section. The
2784 symbol must either have a value of zero, or we must adjust
2785 the addend by the value of the symbol. FIXME: Write this
2786 when we need it. The old linker couldn't handle this anyhow. */
2788 *rel_hash_ptr = NULL;
2793 struct coff_link_hash_entry *h;
2795 h = ((struct coff_link_hash_entry *)
2796 bfd_wrapped_link_hash_lookup (output_bfd, finfo->info,
2797 link_order->u.reloc.p->u.name,
2798 FALSE, FALSE, TRUE));
2802 irel->r_symndx = h->indx;
2805 /* Set the index to -2 to force this symbol to get
2814 if (! ((*finfo->info->callbacks->unattached_reloc)
2815 (finfo->info, link_order->u.reloc.p->u.name, (bfd *) NULL,
2816 (asection *) NULL, (bfd_vma) 0)))
2822 /* FIXME: Is this always right? */
2823 irel->r_type = howto->type;
2825 /* r_size is only used on the RS/6000, which needs its own linker
2826 routines anyhow. r_extern is only used for ECOFF. */
2828 /* FIXME: What is the right value for r_offset? Is zero OK? */
2829 ++output_section->reloc_count;
2834 /* A basic reloc handling routine which may be used by processors with
2838 _bfd_coff_generic_relocate_section (bfd *output_bfd,
2839 struct bfd_link_info *info,
2841 asection *input_section,
2843 struct internal_reloc *relocs,
2844 struct internal_syment *syms,
2845 asection **sections)
2847 struct internal_reloc *rel;
2848 struct internal_reloc *relend;
2851 relend = rel + input_section->reloc_count;
2852 for (; rel < relend; rel++)
2855 struct coff_link_hash_entry *h;
2856 struct internal_syment *sym;
2859 reloc_howto_type *howto;
2860 bfd_reloc_status_type rstat;
2862 symndx = rel->r_symndx;
2870 || (unsigned long) symndx >= obj_raw_syment_count (input_bfd))
2872 (*_bfd_error_handler)
2873 ("%B: illegal symbol index %ld in relocs", input_bfd, symndx);
2878 h = obj_coff_sym_hashes (input_bfd)[symndx];
2879 sym = syms + symndx;
2882 /* COFF treats common symbols in one of two ways. Either the
2883 size of the symbol is included in the section contents, or it
2884 is not. We assume that the size is not included, and force
2885 the rtype_to_howto function to adjust the addend as needed. */
2886 if (sym != NULL && sym->n_scnum != 0)
2887 addend = - sym->n_value;
2891 howto = bfd_coff_rtype_to_howto (input_bfd, input_section, rel, h,
2896 /* If we are doing a relocatable link, then we can just ignore
2897 a PC relative reloc that is pcrel_offset. It will already
2898 have the correct value. If this is not a relocatable link,
2899 then we should ignore the symbol value. */
2900 if (howto->pc_relative && howto->pcrel_offset)
2902 if (info->relocatable)
2904 if (sym != NULL && sym->n_scnum != 0)
2905 addend += sym->n_value;
2916 sec = bfd_abs_section_ptr;
2921 sec = sections[symndx];
2922 val = (sec->output_section->vma
2923 + sec->output_offset
2925 if (! obj_pe (input_bfd))
2931 if (h->root.type == bfd_link_hash_defined
2932 || h->root.type == bfd_link_hash_defweak)
2934 /* Defined weak symbols are a GNU extension. */
2937 sec = h->root.u.def.section;
2938 val = (h->root.u.def.value
2939 + sec->output_section->vma
2940 + sec->output_offset);
2943 else if (h->root.type == bfd_link_hash_undefweak)
2945 if (h->class == C_NT_WEAK && h->numaux == 1)
2947 /* See _Microsoft Portable Executable and Common Object
2948 File Format Specification_, section 5.5.3.
2949 Note that weak symbols without aux records are a GNU
2951 FIXME: All weak externals are treated as having
2952 characteristic IMAGE_WEAK_EXTERN_SEARCH_NOLIBRARY (1).
2953 These behave as per SVR4 ABI: A library member
2954 will resolve a weak external only if a normal
2955 external causes the library member to be linked.
2956 See also linker.c: generic_link_check_archive_element. */
2958 struct coff_link_hash_entry *h2 =
2959 input_bfd->tdata.coff_obj_data->sym_hashes[
2960 h->aux->x_sym.x_tagndx.l];
2962 if (!h2 || h2->root.type == bfd_link_hash_undefined)
2964 sec = bfd_abs_section_ptr;
2969 sec = h2->root.u.def.section;
2970 val = h2->root.u.def.value
2971 + sec->output_section->vma + sec->output_offset;
2975 /* This is a GNU extension. */
2979 else if (! info->relocatable)
2981 if (! ((*info->callbacks->undefined_symbol)
2982 (info, h->root.root.string, input_bfd, input_section,
2983 rel->r_vaddr - input_section->vma, TRUE)))
2988 if (info->base_file)
2990 /* Emit a reloc if the backend thinks it needs it. */
2991 if (sym && pe_data (output_bfd)->in_reloc_p (output_bfd, howto))
2993 /* Relocation to a symbol in a section which isn't
2994 absolute. We output the address here to a file.
2995 This file is then read by dlltool when generating the
2996 reloc section. Note that the base file is not
2997 portable between systems. We write out a bfd_vma here,
2998 and dlltool reads in a bfd_vma. */
2999 bfd_vma addr = (rel->r_vaddr
3000 - input_section->vma
3001 + input_section->output_offset
3002 + input_section->output_section->vma);
3003 if (coff_data (output_bfd)->pe)
3004 addr -= pe_data(output_bfd)->pe_opthdr.ImageBase;
3005 if (fwrite (&addr, 1, sizeof (bfd_vma), (FILE *) info->base_file)
3006 != sizeof (bfd_vma))
3008 bfd_set_error (bfd_error_system_call);
3014 rstat = _bfd_final_link_relocate (howto, input_bfd, input_section,
3016 rel->r_vaddr - input_section->vma,
3025 case bfd_reloc_outofrange:
3026 (*_bfd_error_handler)
3027 (_("%B: bad reloc address 0x%lx in section `%A'"),
3028 input_bfd, input_section, (unsigned long) rel->r_vaddr);
3030 case bfd_reloc_overflow:
3033 char buf[SYMNMLEN + 1];
3041 name = _bfd_coff_internal_syment_name (input_bfd, sym, buf);
3046 if (! ((*info->callbacks->reloc_overflow)
3047 (info, (h ? &h->root : NULL), name, howto->name,
3048 (bfd_vma) 0, input_bfd, input_section,
3049 rel->r_vaddr - input_section->vma)))