1 /* Support for the generic parts of COFF, for BFD.
2 Copyright (C) 1990-2014 Free Software Foundation, Inc.
3 Written by Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
22 /* Most of this hacked by Steve Chamberlain, sac@cygnus.com.
23 Split out of coffcode.h by Ian Taylor, ian@cygnus.com. */
25 /* This file contains COFF code that is not dependent on any
26 particular COFF target. There is only one version of this file in
27 libbfd.a, so no target specific code may be put in here. Or, to
30 ********** DO NOT PUT TARGET SPECIFIC CODE IN THIS FILE **********
32 If you need to add some target specific behaviour, add a new hook
33 function to bfd_coff_backend_data.
35 Some of these functions are also called by the ECOFF routines.
36 Those functions may not use any COFF specific information, such as
42 #include "coff/internal.h"
45 /* Take a section header read from a coff file (in HOST byte order),
46 and make a BFD "section" out of it. This is used by ECOFF. */
49 make_a_section_from_file (bfd *abfd,
50 struct internal_scnhdr *hdr,
51 unsigned int target_index)
53 asection *return_section;
55 bfd_boolean result = TRUE;
60 /* Handle long section names as in PE. On reading, we want to
61 accept long names if the format permits them at all, regardless
62 of the current state of the flag that dictates if we would generate
63 them in outputs; this construct checks if that is the case by
64 attempting to set the flag, without changing its state; the call
65 will fail for formats that do not support long names at all. */
66 if (bfd_coff_set_long_section_names (abfd, bfd_coff_long_section_names (abfd))
67 && hdr->s_name[0] == '/')
74 /* Flag that this BFD uses long names, even though the format might
75 expect them to be off by default. This won't directly affect the
76 format of any output BFD created from this one, but the information
77 can be used to decide what to do. */
78 bfd_coff_set_long_section_names (abfd, TRUE);
79 memcpy (buf, hdr->s_name + 1, SCNNMLEN - 1);
80 buf[SCNNMLEN - 1] = '\0';
81 strindex = strtol (buf, &p, 10);
82 if (*p == '\0' && strindex >= 0)
84 strings = _bfd_coff_read_string_table (abfd);
87 if ((bfd_size_type)(strindex + 2) >= obj_coff_strings_len (abfd))
90 name = (char *) bfd_alloc (abfd,
91 (bfd_size_type) strlen (strings) + 1 + 1);
94 strcpy (name, strings);
100 /* Assorted wastage to null-terminate the name, thanks AT&T! */
101 name = (char *) bfd_alloc (abfd,
102 (bfd_size_type) sizeof (hdr->s_name) + 1 + 1);
105 strncpy (name, (char *) &hdr->s_name[0], sizeof (hdr->s_name));
106 name[sizeof (hdr->s_name)] = 0;
109 return_section = bfd_make_section_anyway (abfd, name);
110 if (return_section == NULL)
113 return_section->vma = hdr->s_vaddr;
114 return_section->lma = hdr->s_paddr;
115 return_section->size = hdr->s_size;
116 return_section->filepos = hdr->s_scnptr;
117 return_section->rel_filepos = hdr->s_relptr;
118 return_section->reloc_count = hdr->s_nreloc;
120 bfd_coff_set_alignment_hook (abfd, return_section, hdr);
122 return_section->line_filepos = hdr->s_lnnoptr;
124 return_section->lineno_count = hdr->s_nlnno;
125 return_section->userdata = NULL;
126 return_section->next = NULL;
127 return_section->target_index = target_index;
129 if (! bfd_coff_styp_to_sec_flags_hook (abfd, hdr, name, return_section,
133 return_section->flags = flags;
135 /* At least on i386-coff, the line number count for a shared library
136 section must be ignored. */
137 if ((return_section->flags & SEC_COFF_SHARED_LIBRARY) != 0)
138 return_section->lineno_count = 0;
140 if (hdr->s_nreloc != 0)
141 return_section->flags |= SEC_RELOC;
142 /* FIXME: should this check 'hdr->s_size > 0'. */
143 if (hdr->s_scnptr != 0)
144 return_section->flags |= SEC_HAS_CONTENTS;
146 /* Compress/decompress DWARF debug sections with names: .debug_* and
147 .zdebug_*, after the section flags is set. */
148 if ((flags & SEC_DEBUGGING)
150 && ((name[1] == 'd' && name[6] == '_')
151 || (strlen (name) > 8 && name[1] == 'z' && name[7] == '_')))
153 enum { nothing, compress, decompress } action = nothing;
154 char *new_name = NULL;
156 if (bfd_is_section_compressed (abfd, return_section))
158 /* Compressed section. Check if we should decompress. */
159 if ((abfd->flags & BFD_DECOMPRESS))
162 else if (!bfd_is_section_compressed (abfd, return_section))
164 /* Normal section. Check if we should compress. */
165 if ((abfd->flags & BFD_COMPRESS) && return_section->size != 0)
174 if (!bfd_init_section_compress_status (abfd, return_section))
176 (*_bfd_error_handler)
177 (_("%B: unable to initialize compress status for section %s"),
183 unsigned int len = strlen (name);
185 new_name = bfd_alloc (abfd, len + 2);
186 if (new_name == NULL)
190 memcpy (new_name + 2, name + 1, len);
194 if (!bfd_init_section_decompress_status (abfd, return_section))
196 (*_bfd_error_handler)
197 (_("%B: unable to initialize decompress status for section %s"),
203 unsigned int len = strlen (name);
205 new_name = bfd_alloc (abfd, len);
206 if (new_name == NULL)
209 memcpy (new_name + 1, name + 2, len - 1);
213 if (new_name != NULL)
214 bfd_rename_section (abfd, return_section, new_name);
220 /* Read in a COFF object and make it into a BFD. This is used by
223 coff_real_object_p (bfd *,
225 struct internal_filehdr *,
226 struct internal_aouthdr *);
228 coff_real_object_p (bfd *abfd,
230 struct internal_filehdr *internal_f,
231 struct internal_aouthdr *internal_a)
233 flagword oflags = abfd->flags;
234 bfd_vma ostart = bfd_get_start_address (abfd);
237 bfd_size_type readsize; /* Length of file_info. */
239 char *external_sections;
241 if (!(internal_f->f_flags & F_RELFLG))
242 abfd->flags |= HAS_RELOC;
243 if ((internal_f->f_flags & F_EXEC))
244 abfd->flags |= EXEC_P;
245 if (!(internal_f->f_flags & F_LNNO))
246 abfd->flags |= HAS_LINENO;
247 if (!(internal_f->f_flags & F_LSYMS))
248 abfd->flags |= HAS_LOCALS;
250 /* FIXME: How can we set D_PAGED correctly? */
251 if ((internal_f->f_flags & F_EXEC) != 0)
252 abfd->flags |= D_PAGED;
254 bfd_get_symcount (abfd) = internal_f->f_nsyms;
255 if (internal_f->f_nsyms)
256 abfd->flags |= HAS_SYMS;
258 if (internal_a != (struct internal_aouthdr *) NULL)
259 bfd_get_start_address (abfd) = internal_a->entry;
261 bfd_get_start_address (abfd) = 0;
263 /* Set up the tdata area. ECOFF uses its own routine, and overrides
265 tdata_save = abfd->tdata.any;
266 tdata = bfd_coff_mkobject_hook (abfd, (void *) internal_f, (void *) internal_a);
270 scnhsz = bfd_coff_scnhsz (abfd);
271 readsize = (bfd_size_type) nscns * scnhsz;
272 external_sections = (char *) bfd_alloc (abfd, readsize);
273 if (!external_sections)
276 if (bfd_bread ((void *) external_sections, readsize, abfd) != readsize)
279 /* Set the arch/mach *before* swapping in sections; section header swapping
280 may depend on arch/mach info. */
281 if (! bfd_coff_set_arch_mach_hook (abfd, (void *) internal_f))
284 /* Now copy data as required; construct all asections etc. */
288 for (i = 0; i < nscns; i++)
290 struct internal_scnhdr tmp;
291 bfd_coff_swap_scnhdr_in (abfd,
292 (void *) (external_sections + i * scnhsz),
294 if (! make_a_section_from_file (abfd, &tmp, i + 1))
302 bfd_release (abfd, tdata);
304 abfd->tdata.any = tdata_save;
305 abfd->flags = oflags;
306 bfd_get_start_address (abfd) = ostart;
307 return (const bfd_target *) NULL;
310 /* Turn a COFF file into a BFD, but fail with bfd_error_wrong_format if it is
311 not a COFF file. This is also used by ECOFF. */
314 coff_object_p (bfd *abfd)
316 bfd_size_type filhsz;
317 bfd_size_type aoutsz;
320 struct internal_filehdr internal_f;
321 struct internal_aouthdr internal_a;
323 /* Figure out how much to read. */
324 filhsz = bfd_coff_filhsz (abfd);
325 aoutsz = bfd_coff_aoutsz (abfd);
327 filehdr = bfd_alloc (abfd, filhsz);
330 if (bfd_bread (filehdr, filhsz, abfd) != filhsz)
332 if (bfd_get_error () != bfd_error_system_call)
333 bfd_set_error (bfd_error_wrong_format);
334 bfd_release (abfd, filehdr);
337 bfd_coff_swap_filehdr_in (abfd, filehdr, &internal_f);
338 bfd_release (abfd, filehdr);
340 /* The XCOFF format has two sizes for the f_opthdr. SMALL_AOUTSZ
341 (less than aoutsz) used in object files and AOUTSZ (equal to
342 aoutsz) in executables. The bfd_coff_swap_aouthdr_in function
343 expects this header to be aoutsz bytes in length, so we use that
344 value in the call to bfd_alloc below. But we must be careful to
345 only read in f_opthdr bytes in the call to bfd_bread. We should
346 also attempt to catch corrupt or non-COFF binaries with a strange
347 value for f_opthdr. */
348 if (! bfd_coff_bad_format_hook (abfd, &internal_f)
349 || internal_f.f_opthdr > aoutsz)
351 bfd_set_error (bfd_error_wrong_format);
354 nscns = internal_f.f_nscns;
356 if (internal_f.f_opthdr)
360 opthdr = bfd_alloc (abfd, aoutsz);
363 if (bfd_bread (opthdr, (bfd_size_type) internal_f.f_opthdr, abfd)
364 != internal_f.f_opthdr)
366 bfd_release (abfd, opthdr);
369 /* PR 17512: file: 11056-1136-0.004. */
370 if (internal_f.f_opthdr < aoutsz)
371 memset (((char *) opthdr) + internal_f.f_opthdr, 0, aoutsz - internal_f.f_opthdr);
373 bfd_coff_swap_aouthdr_in (abfd, opthdr, (void *) &internal_a);
374 bfd_release (abfd, opthdr);
377 return coff_real_object_p (abfd, nscns, &internal_f,
378 (internal_f.f_opthdr != 0
380 : (struct internal_aouthdr *) NULL));
383 /* Get the BFD section from a COFF symbol section number. */
386 coff_section_from_bfd_index (bfd *abfd, int section_index)
388 struct bfd_section *answer = abfd->sections;
390 if (section_index == N_ABS)
391 return bfd_abs_section_ptr;
392 if (section_index == N_UNDEF)
393 return bfd_und_section_ptr;
394 if (section_index == N_DEBUG)
395 return bfd_abs_section_ptr;
399 if (answer->target_index == section_index)
401 answer = answer->next;
404 /* We should not reach this point, but the SCO 3.2v4 /lib/libc_s.a
405 has a bad symbol table in biglitpow.o. */
406 return bfd_und_section_ptr;
409 /* Get the upper bound of a COFF symbol table. */
412 coff_get_symtab_upper_bound (bfd *abfd)
414 if (!bfd_coff_slurp_symbol_table (abfd))
417 return (bfd_get_symcount (abfd) + 1) * (sizeof (coff_symbol_type *));
420 /* Canonicalize a COFF symbol table. */
423 coff_canonicalize_symtab (bfd *abfd, asymbol **alocation)
425 unsigned int counter;
426 coff_symbol_type *symbase;
427 coff_symbol_type **location = (coff_symbol_type **) alocation;
429 if (!bfd_coff_slurp_symbol_table (abfd))
432 symbase = obj_symbols (abfd);
433 counter = bfd_get_symcount (abfd);
434 while (counter-- > 0)
435 *location++ = symbase++;
439 return bfd_get_symcount (abfd);
442 /* Get the name of a symbol. The caller must pass in a buffer of size
446 _bfd_coff_internal_syment_name (bfd *abfd,
447 const struct internal_syment *sym,
450 /* FIXME: It's not clear this will work correctly if sizeof
452 if (sym->_n._n_n._n_zeroes != 0
453 || sym->_n._n_n._n_offset == 0)
455 memcpy (buf, sym->_n._n_name, SYMNMLEN);
456 buf[SYMNMLEN] = '\0';
463 BFD_ASSERT (sym->_n._n_n._n_offset >= STRING_SIZE_SIZE);
464 strings = obj_coff_strings (abfd);
467 strings = _bfd_coff_read_string_table (abfd);
471 if (sym->_n._n_n._n_offset >= obj_coff_strings_len (abfd))
473 return strings + sym->_n._n_n._n_offset;
477 /* Read in and swap the relocs. This returns a buffer holding the
478 relocs for section SEC in file ABFD. If CACHE is TRUE and
479 INTERNAL_RELOCS is NULL, the relocs read in will be saved in case
480 the function is called again. If EXTERNAL_RELOCS is not NULL, it
481 is a buffer large enough to hold the unswapped relocs. If
482 INTERNAL_RELOCS is not NULL, it is a buffer large enough to hold
483 the swapped relocs. If REQUIRE_INTERNAL is TRUE, then the return
484 value must be INTERNAL_RELOCS. The function returns NULL on error. */
486 struct internal_reloc *
487 _bfd_coff_read_internal_relocs (bfd *abfd,
490 bfd_byte *external_relocs,
491 bfd_boolean require_internal,
492 struct internal_reloc *internal_relocs)
495 bfd_byte *free_external = NULL;
496 struct internal_reloc *free_internal = NULL;
499 struct internal_reloc *irel;
502 if (sec->reloc_count == 0)
503 return internal_relocs; /* Nothing to do. */
505 if (coff_section_data (abfd, sec) != NULL
506 && coff_section_data (abfd, sec)->relocs != NULL)
508 if (! require_internal)
509 return coff_section_data (abfd, sec)->relocs;
510 memcpy (internal_relocs, coff_section_data (abfd, sec)->relocs,
511 sec->reloc_count * sizeof (struct internal_reloc));
512 return internal_relocs;
515 relsz = bfd_coff_relsz (abfd);
517 amt = sec->reloc_count * relsz;
518 if (external_relocs == NULL)
520 free_external = (bfd_byte *) bfd_malloc (amt);
521 if (free_external == NULL)
523 external_relocs = free_external;
526 if (bfd_seek (abfd, sec->rel_filepos, SEEK_SET) != 0
527 || bfd_bread (external_relocs, amt, abfd) != amt)
530 if (internal_relocs == NULL)
532 amt = sec->reloc_count;
533 amt *= sizeof (struct internal_reloc);
534 free_internal = (struct internal_reloc *) bfd_malloc (amt);
535 if (free_internal == NULL)
537 internal_relocs = free_internal;
540 /* Swap in the relocs. */
541 erel = external_relocs;
542 erel_end = erel + relsz * sec->reloc_count;
543 irel = internal_relocs;
544 for (; erel < erel_end; erel += relsz, irel++)
545 bfd_coff_swap_reloc_in (abfd, (void *) erel, (void *) irel);
547 if (free_external != NULL)
549 free (free_external);
550 free_external = NULL;
553 if (cache && free_internal != NULL)
555 if (coff_section_data (abfd, sec) == NULL)
557 amt = sizeof (struct coff_section_tdata);
558 sec->used_by_bfd = bfd_zalloc (abfd, amt);
559 if (sec->used_by_bfd == NULL)
561 coff_section_data (abfd, sec)->contents = NULL;
563 coff_section_data (abfd, sec)->relocs = free_internal;
566 return internal_relocs;
569 if (free_external != NULL)
570 free (free_external);
571 if (free_internal != NULL)
572 free (free_internal);
576 /* Set lineno_count for the output sections of a COFF file. */
579 coff_count_linenumbers (bfd *abfd)
581 unsigned int limit = bfd_get_symcount (abfd);
589 /* This may be from the backend linker, in which case the
590 lineno_count in the sections is correct. */
591 for (s = abfd->sections; s != NULL; s = s->next)
592 total += s->lineno_count;
596 for (s = abfd->sections; s != NULL; s = s->next)
597 BFD_ASSERT (s->lineno_count == 0);
599 for (p = abfd->outsymbols, i = 0; i < limit; i++, p++)
601 asymbol *q_maybe = *p;
603 if (bfd_family_coff (bfd_asymbol_bfd (q_maybe)))
605 coff_symbol_type *q = coffsymbol (q_maybe);
607 /* The AIX 4.1 compiler can sometimes generate line numbers
608 attached to debugging symbols. We try to simply ignore
610 if (q->lineno != NULL
611 && q->symbol.section->owner != NULL)
613 /* This symbol has line numbers. Increment the owning
614 section's linenumber count. */
615 alent *l = q->lineno;
619 asection * sec = q->symbol.section->output_section;
621 /* Do not try to update fields in read-only sections. */
622 if (! bfd_is_const_section (sec))
623 sec->lineno_count ++;
628 while (l->line_number != 0);
637 fixup_symbol_value (bfd *abfd,
638 coff_symbol_type *coff_symbol_ptr,
639 struct internal_syment *syment)
641 /* Normalize the symbol flags. */
642 if (coff_symbol_ptr->symbol.section
643 && bfd_is_com_section (coff_symbol_ptr->symbol.section))
645 /* A common symbol is undefined with a value. */
646 syment->n_scnum = N_UNDEF;
647 syment->n_value = coff_symbol_ptr->symbol.value;
649 else if ((coff_symbol_ptr->symbol.flags & BSF_DEBUGGING) != 0
650 && (coff_symbol_ptr->symbol.flags & BSF_DEBUGGING_RELOC) == 0)
652 syment->n_value = coff_symbol_ptr->symbol.value;
654 else if (bfd_is_und_section (coff_symbol_ptr->symbol.section))
656 syment->n_scnum = N_UNDEF;
659 /* FIXME: Do we need to handle the absolute section here? */
662 if (coff_symbol_ptr->symbol.section)
665 coff_symbol_ptr->symbol.section->output_section->target_index;
667 syment->n_value = (coff_symbol_ptr->symbol.value
668 + coff_symbol_ptr->symbol.section->output_offset);
671 syment->n_value += (syment->n_sclass == C_STATLAB)
672 ? coff_symbol_ptr->symbol.section->output_section->lma
673 : coff_symbol_ptr->symbol.section->output_section->vma;
679 /* This can happen, but I don't know why yet (steve@cygnus.com) */
680 syment->n_scnum = N_ABS;
681 syment->n_value = coff_symbol_ptr->symbol.value;
686 /* Run through all the symbols in the symbol table and work out what
687 their indexes into the symbol table will be when output.
689 Coff requires that each C_FILE symbol points to the next one in the
690 chain, and that the last one points to the first external symbol. We
694 coff_renumber_symbols (bfd *bfd_ptr, int *first_undef)
696 unsigned int symbol_count = bfd_get_symcount (bfd_ptr);
697 asymbol **symbol_ptr_ptr = bfd_ptr->outsymbols;
698 unsigned int native_index = 0;
699 struct internal_syment *last_file = NULL;
700 unsigned int symbol_index;
702 /* COFF demands that undefined symbols come after all other symbols.
703 Since we don't need to impose this extra knowledge on all our
704 client programs, deal with that here. Sort the symbol table;
705 just move the undefined symbols to the end, leaving the rest
706 alone. The O'Reilly book says that defined global symbols come
707 at the end before the undefined symbols, so we do that here as
709 /* @@ Do we have some condition we could test for, so we don't always
710 have to do this? I don't think relocatability is quite right, but
711 I'm not certain. [raeburn:19920508.1711EST] */
717 amt = sizeof (asymbol *) * ((bfd_size_type) symbol_count + 1);
718 newsyms = (asymbol **) bfd_alloc (bfd_ptr, amt);
721 bfd_ptr->outsymbols = newsyms;
722 for (i = 0; i < symbol_count; i++)
723 if ((symbol_ptr_ptr[i]->flags & BSF_NOT_AT_END) != 0
724 || (!bfd_is_und_section (symbol_ptr_ptr[i]->section)
725 && !bfd_is_com_section (symbol_ptr_ptr[i]->section)
726 && ((symbol_ptr_ptr[i]->flags & BSF_FUNCTION) != 0
727 || ((symbol_ptr_ptr[i]->flags & (BSF_GLOBAL | BSF_WEAK))
729 *newsyms++ = symbol_ptr_ptr[i];
731 for (i = 0; i < symbol_count; i++)
732 if ((symbol_ptr_ptr[i]->flags & BSF_NOT_AT_END) == 0
733 && !bfd_is_und_section (symbol_ptr_ptr[i]->section)
734 && (bfd_is_com_section (symbol_ptr_ptr[i]->section)
735 || ((symbol_ptr_ptr[i]->flags & BSF_FUNCTION) == 0
736 && ((symbol_ptr_ptr[i]->flags & (BSF_GLOBAL | BSF_WEAK))
738 *newsyms++ = symbol_ptr_ptr[i];
740 *first_undef = newsyms - bfd_ptr->outsymbols;
742 for (i = 0; i < symbol_count; i++)
743 if ((symbol_ptr_ptr[i]->flags & BSF_NOT_AT_END) == 0
744 && bfd_is_und_section (symbol_ptr_ptr[i]->section))
745 *newsyms++ = symbol_ptr_ptr[i];
746 *newsyms = (asymbol *) NULL;
747 symbol_ptr_ptr = bfd_ptr->outsymbols;
750 for (symbol_index = 0; symbol_index < symbol_count; symbol_index++)
752 coff_symbol_type *coff_symbol_ptr;
754 coff_symbol_ptr = coff_symbol_from (symbol_ptr_ptr[symbol_index]);
755 symbol_ptr_ptr[symbol_index]->udata.i = symbol_index;
756 if (coff_symbol_ptr && coff_symbol_ptr->native)
758 combined_entry_type *s = coff_symbol_ptr->native;
761 BFD_ASSERT (s->is_sym);
762 if (s->u.syment.n_sclass == C_FILE)
764 if (last_file != NULL)
765 last_file->n_value = native_index;
766 last_file = &(s->u.syment);
769 /* Modify the symbol values according to their section and
771 fixup_symbol_value (bfd_ptr, coff_symbol_ptr, &(s->u.syment));
773 for (i = 0; i < s->u.syment.n_numaux + 1; i++)
774 s[i].offset = native_index++;
780 obj_conv_table_size (bfd_ptr) = native_index;
785 /* Run thorough the symbol table again, and fix it so that all
786 pointers to entries are changed to the entries' index in the output
790 coff_mangle_symbols (bfd *bfd_ptr)
792 unsigned int symbol_count = bfd_get_symcount (bfd_ptr);
793 asymbol **symbol_ptr_ptr = bfd_ptr->outsymbols;
794 unsigned int symbol_index;
796 for (symbol_index = 0; symbol_index < symbol_count; symbol_index++)
798 coff_symbol_type *coff_symbol_ptr;
800 coff_symbol_ptr = coff_symbol_from (symbol_ptr_ptr[symbol_index]);
801 if (coff_symbol_ptr && coff_symbol_ptr->native)
804 combined_entry_type *s = coff_symbol_ptr->native;
806 BFD_ASSERT (s->is_sym);
809 /* FIXME: We should use a union here. */
810 s->u.syment.n_value =
811 (bfd_hostptr_t) ((combined_entry_type *)
812 ((bfd_hostptr_t) s->u.syment.n_value))->offset;
817 /* The value is the offset into the line number entries
818 for the symbol's section. On output, the symbol's
819 section should be N_DEBUG. */
820 s->u.syment.n_value =
821 (coff_symbol_ptr->symbol.section->output_section->line_filepos
822 + s->u.syment.n_value * bfd_coff_linesz (bfd_ptr));
823 coff_symbol_ptr->symbol.section =
824 coff_section_from_bfd_index (bfd_ptr, N_DEBUG);
825 BFD_ASSERT (coff_symbol_ptr->symbol.flags & BSF_DEBUGGING);
827 for (i = 0; i < s->u.syment.n_numaux; i++)
829 combined_entry_type *a = s + i + 1;
831 BFD_ASSERT (! a->is_sym);
834 a->u.auxent.x_sym.x_tagndx.l =
835 a->u.auxent.x_sym.x_tagndx.p->offset;
840 a->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.l =
841 a->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.p->offset;
846 a->u.auxent.x_csect.x_scnlen.l =
847 a->u.auxent.x_csect.x_scnlen.p->offset;
856 coff_fix_symbol_name (bfd *abfd,
858 combined_entry_type *native,
859 bfd_size_type *string_size_p,
860 asection **debug_string_section_p,
861 bfd_size_type *debug_string_size_p)
863 unsigned int name_length;
864 union internal_auxent *auxent;
865 char *name = (char *) (symbol->name);
869 /* COFF symbols always have names, so we'll make one up. */
870 symbol->name = "strange";
871 name = (char *) symbol->name;
873 name_length = strlen (name);
875 BFD_ASSERT (native->is_sym);
876 if (native->u.syment.n_sclass == C_FILE
877 && native->u.syment.n_numaux > 0)
879 unsigned int filnmlen;
881 if (bfd_coff_force_symnames_in_strings (abfd))
883 native->u.syment._n._n_n._n_offset =
884 (*string_size_p + STRING_SIZE_SIZE);
885 native->u.syment._n._n_n._n_zeroes = 0;
886 *string_size_p += 6; /* strlen(".file") + 1 */
889 strncpy (native->u.syment._n._n_name, ".file", SYMNMLEN);
891 BFD_ASSERT (! (native + 1)->is_sym);
892 auxent = &(native + 1)->u.auxent;
894 filnmlen = bfd_coff_filnmlen (abfd);
896 if (bfd_coff_long_filenames (abfd))
898 if (name_length <= filnmlen)
899 strncpy (auxent->x_file.x_fname, name, filnmlen);
902 auxent->x_file.x_n.x_offset = *string_size_p + STRING_SIZE_SIZE;
903 auxent->x_file.x_n.x_zeroes = 0;
904 *string_size_p += name_length + 1;
909 strncpy (auxent->x_file.x_fname, name, filnmlen);
910 if (name_length > filnmlen)
911 name[filnmlen] = '\0';
916 if (name_length <= SYMNMLEN && !bfd_coff_force_symnames_in_strings (abfd))
917 /* This name will fit into the symbol neatly. */
918 strncpy (native->u.syment._n._n_name, symbol->name, SYMNMLEN);
920 else if (!bfd_coff_symname_in_debug (abfd, &native->u.syment))
922 native->u.syment._n._n_n._n_offset = (*string_size_p
924 native->u.syment._n._n_n._n_zeroes = 0;
925 *string_size_p += name_length + 1;
931 int prefix_len = bfd_coff_debug_string_prefix_length (abfd);
933 /* This name should be written into the .debug section. For
934 some reason each name is preceded by a two byte length
935 and also followed by a null byte. FIXME: We assume that
936 the .debug section has already been created, and that it
938 if (*debug_string_section_p == (asection *) NULL)
939 *debug_string_section_p = bfd_get_section_by_name (abfd, ".debug");
940 filepos = bfd_tell (abfd);
942 bfd_put_32 (abfd, (bfd_vma) (name_length + 1), buf);
944 bfd_put_16 (abfd, (bfd_vma) (name_length + 1), buf);
946 if (!bfd_set_section_contents (abfd,
947 *debug_string_section_p,
949 (file_ptr) *debug_string_size_p,
950 (bfd_size_type) prefix_len)
951 || !bfd_set_section_contents (abfd,
952 *debug_string_section_p,
953 (void *) symbol->name,
954 (file_ptr) (*debug_string_size_p
956 (bfd_size_type) name_length + 1))
958 if (bfd_seek (abfd, filepos, SEEK_SET) != 0)
960 native->u.syment._n._n_n._n_offset =
961 *debug_string_size_p + prefix_len;
962 native->u.syment._n._n_n._n_zeroes = 0;
963 *debug_string_size_p += name_length + 1 + prefix_len;
968 /* We need to keep track of the symbol index so that when we write out
969 the relocs we can get the index for a symbol. This method is a
972 #define set_index(symbol, idx) ((symbol)->udata.i = (idx))
974 /* Write a symbol out to a COFF file. */
977 coff_write_symbol (bfd *abfd,
979 combined_entry_type *native,
981 bfd_size_type *string_size_p,
982 asection **debug_string_section_p,
983 bfd_size_type *debug_string_size_p)
985 unsigned int numaux = native->u.syment.n_numaux;
986 int type = native->u.syment.n_type;
987 int n_sclass = (int) native->u.syment.n_sclass;
988 asection *output_section = symbol->section->output_section
989 ? symbol->section->output_section
992 bfd_size_type symesz;
994 BFD_ASSERT (native->is_sym);
996 if (native->u.syment.n_sclass == C_FILE)
997 symbol->flags |= BSF_DEBUGGING;
999 if (symbol->flags & BSF_DEBUGGING
1000 && bfd_is_abs_section (symbol->section))
1001 native->u.syment.n_scnum = N_DEBUG;
1003 else if (bfd_is_abs_section (symbol->section))
1004 native->u.syment.n_scnum = N_ABS;
1006 else if (bfd_is_und_section (symbol->section))
1007 native->u.syment.n_scnum = N_UNDEF;
1010 native->u.syment.n_scnum =
1011 output_section->target_index;
1013 coff_fix_symbol_name (abfd, symbol, native, string_size_p,
1014 debug_string_section_p, debug_string_size_p);
1016 symesz = bfd_coff_symesz (abfd);
1017 buf = bfd_alloc (abfd, symesz);
1020 bfd_coff_swap_sym_out (abfd, &native->u.syment, buf);
1021 if (bfd_bwrite (buf, symesz, abfd) != symesz)
1023 bfd_release (abfd, buf);
1025 if (native->u.syment.n_numaux > 0)
1027 bfd_size_type auxesz;
1030 auxesz = bfd_coff_auxesz (abfd);
1031 buf = bfd_alloc (abfd, auxesz);
1034 for (j = 0; j < native->u.syment.n_numaux; j++)
1036 BFD_ASSERT (! (native + j + 1)->is_sym);
1037 bfd_coff_swap_aux_out (abfd,
1038 &((native + j + 1)->u.auxent),
1039 type, n_sclass, (int) j,
1040 native->u.syment.n_numaux,
1042 if (bfd_bwrite (buf, auxesz, abfd) != auxesz)
1045 bfd_release (abfd, buf);
1048 /* Store the index for use when we write out the relocs. */
1049 set_index (symbol, *written);
1051 *written += numaux + 1;
1055 /* Write out a symbol to a COFF file that does not come from a COFF
1056 file originally. This symbol may have been created by the linker,
1057 or we may be linking a non COFF file to a COFF file. */
1060 coff_write_alien_symbol (bfd *abfd,
1062 struct internal_syment *isym,
1064 bfd_size_type *string_size_p,
1065 asection **debug_string_section_p,
1066 bfd_size_type *debug_string_size_p)
1068 combined_entry_type *native;
1069 combined_entry_type dummy[2];
1070 asection *output_section = symbol->section->output_section
1071 ? symbol->section->output_section
1073 struct bfd_link_info *link_info = coff_data (abfd)->link_info;
1076 if ((!link_info || link_info->strip_discarded)
1077 && !bfd_is_abs_section (symbol->section)
1078 && symbol->section->output_section == bfd_abs_section_ptr)
1082 memset (isym, 0, sizeof (*isym));
1086 native->is_sym = TRUE;
1087 native[1].is_sym = FALSE;
1088 native->u.syment.n_type = T_NULL;
1089 native->u.syment.n_flags = 0;
1090 native->u.syment.n_numaux = 0;
1091 if (bfd_is_und_section (symbol->section))
1093 native->u.syment.n_scnum = N_UNDEF;
1094 native->u.syment.n_value = symbol->value;
1096 else if (bfd_is_com_section (symbol->section))
1098 native->u.syment.n_scnum = N_UNDEF;
1099 native->u.syment.n_value = symbol->value;
1101 else if (symbol->flags & BSF_FILE)
1103 native->u.syment.n_scnum = N_DEBUG;
1104 native->u.syment.n_numaux = 1;
1106 else if (symbol->flags & BSF_DEBUGGING)
1108 /* There isn't much point to writing out a debugging symbol
1109 unless we are prepared to convert it into COFF debugging
1110 format. So, we just ignore them. We must clobber the symbol
1111 name to keep it from being put in the string table. */
1114 memset (isym, 0, sizeof (*isym));
1119 native->u.syment.n_scnum = output_section->target_index;
1120 native->u.syment.n_value = (symbol->value
1121 + symbol->section->output_offset);
1122 if (! obj_pe (abfd))
1123 native->u.syment.n_value += output_section->vma;
1125 /* Copy the any flags from the file header into the symbol.
1128 coff_symbol_type *c = coff_symbol_from (symbol);
1129 if (c != (coff_symbol_type *) NULL)
1130 native->u.syment.n_flags = bfd_asymbol_bfd (&c->symbol)->flags;
1134 native->u.syment.n_type = 0;
1135 if (symbol->flags & BSF_FILE)
1136 native->u.syment.n_sclass = C_FILE;
1137 else if (symbol->flags & BSF_LOCAL)
1138 native->u.syment.n_sclass = C_STAT;
1139 else if (symbol->flags & BSF_WEAK)
1140 native->u.syment.n_sclass = obj_pe (abfd) ? C_NT_WEAK : C_WEAKEXT;
1142 native->u.syment.n_sclass = C_EXT;
1144 ret = coff_write_symbol (abfd, symbol, native, written, string_size_p,
1145 debug_string_section_p, debug_string_size_p);
1147 *isym = native->u.syment;
1151 /* Write a native symbol to a COFF file. */
1154 coff_write_native_symbol (bfd *abfd,
1155 coff_symbol_type *symbol,
1157 bfd_size_type *string_size_p,
1158 asection **debug_string_section_p,
1159 bfd_size_type *debug_string_size_p)
1161 combined_entry_type *native = symbol->native;
1162 alent *lineno = symbol->lineno;
1163 struct bfd_link_info *link_info = coff_data (abfd)->link_info;
1165 if ((!link_info || link_info->strip_discarded)
1166 && !bfd_is_abs_section (symbol->symbol.section)
1167 && symbol->symbol.section->output_section == bfd_abs_section_ptr)
1169 symbol->symbol.name = "";
1173 BFD_ASSERT (native->is_sym);
1174 /* If this symbol has an associated line number, we must store the
1175 symbol index in the line number field. We also tag the auxent to
1176 point to the right place in the lineno table. */
1177 if (lineno && !symbol->done_lineno && symbol->symbol.section->owner != NULL)
1179 unsigned int count = 0;
1181 lineno[count].u.offset = *written;
1182 if (native->u.syment.n_numaux)
1184 union internal_auxent *a = &((native + 1)->u.auxent);
1186 a->x_sym.x_fcnary.x_fcn.x_lnnoptr =
1187 symbol->symbol.section->output_section->moving_line_filepos;
1190 /* Count and relocate all other linenumbers. */
1192 while (lineno[count].line_number != 0)
1194 lineno[count].u.offset +=
1195 (symbol->symbol.section->output_section->vma
1196 + symbol->symbol.section->output_offset);
1199 symbol->done_lineno = TRUE;
1201 if (! bfd_is_const_section (symbol->symbol.section->output_section))
1202 symbol->symbol.section->output_section->moving_line_filepos +=
1203 count * bfd_coff_linesz (abfd);
1206 return coff_write_symbol (abfd, &(symbol->symbol), native, written,
1207 string_size_p, debug_string_section_p,
1208 debug_string_size_p);
1212 null_error_handler (const char * fmt ATTRIBUTE_UNUSED, ...)
1216 /* Write out the COFF symbols. */
1219 coff_write_symbols (bfd *abfd)
1221 bfd_size_type string_size;
1222 asection *debug_string_section;
1223 bfd_size_type debug_string_size;
1225 unsigned int limit = bfd_get_symcount (abfd);
1226 bfd_vma written = 0;
1230 debug_string_section = NULL;
1231 debug_string_size = 0;
1233 /* If this target supports long section names, they must be put into
1234 the string table. This is supported by PE. This code must
1235 handle section names just as they are handled in
1236 coff_write_object_contents. */
1237 if (bfd_coff_long_section_names (abfd))
1241 for (o = abfd->sections; o != NULL; o = o->next)
1245 len = strlen (o->name);
1247 string_size += len + 1;
1251 /* Seek to the right place. */
1252 if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0)
1255 /* Output all the symbols we have. */
1257 for (p = abfd->outsymbols, i = 0; i < limit; i++, p++)
1259 asymbol *symbol = *p;
1260 coff_symbol_type *c_symbol = coff_symbol_from (symbol);
1262 if (c_symbol == (coff_symbol_type *) NULL
1263 || c_symbol->native == (combined_entry_type *) NULL)
1265 if (!coff_write_alien_symbol (abfd, symbol, NULL, &written,
1266 &string_size, &debug_string_section,
1267 &debug_string_size))
1272 if (coff_backend_info (abfd)->_bfd_coff_classify_symbol != NULL)
1274 bfd_error_handler_type current_error_handler;
1275 enum coff_symbol_classification sym_class;
1276 unsigned char *n_sclass;
1278 /* Suppress error reporting by bfd_coff_classify_symbol.
1279 Error messages can be generated when we are processing a local
1280 symbol which has no associated section and we do not have to
1281 worry about this, all we need to know is that it is local. */
1282 current_error_handler = bfd_set_error_handler (null_error_handler);
1283 BFD_ASSERT (c_symbol->native->is_sym);
1284 sym_class = bfd_coff_classify_symbol (abfd,
1285 &c_symbol->native->u.syment);
1286 (void) bfd_set_error_handler (current_error_handler);
1288 n_sclass = &c_symbol->native->u.syment.n_sclass;
1290 /* If the symbol class has been changed (eg objcopy/ld script/etc)
1291 we cannot retain the existing sclass from the original symbol.
1292 Weak symbols only have one valid sclass, so just set it always.
1293 If it is not local class and should be, set it C_STAT.
1294 If it is global and not classified as global, or if it is
1295 weak (which is also classified as global), set it C_EXT. */
1297 if (symbol->flags & BSF_WEAK)
1298 *n_sclass = obj_pe (abfd) ? C_NT_WEAK : C_WEAKEXT;
1299 else if (symbol->flags & BSF_LOCAL && sym_class != COFF_SYMBOL_LOCAL)
1301 else if (symbol->flags & BSF_GLOBAL
1302 && (sym_class != COFF_SYMBOL_GLOBAL
1304 || *n_sclass == C_NT_WEAK
1306 || *n_sclass == C_WEAKEXT))
1307 c_symbol->native->u.syment.n_sclass = C_EXT;
1310 if (!coff_write_native_symbol (abfd, c_symbol, &written,
1311 &string_size, &debug_string_section,
1312 &debug_string_size))
1317 obj_raw_syment_count (abfd) = written;
1319 /* Now write out strings. */
1320 if (string_size != 0)
1322 unsigned int size = string_size + STRING_SIZE_SIZE;
1323 bfd_byte buffer[STRING_SIZE_SIZE];
1325 #if STRING_SIZE_SIZE == 4
1326 H_PUT_32 (abfd, size, buffer);
1328 #error Change H_PUT_32
1330 if (bfd_bwrite ((void *) buffer, (bfd_size_type) sizeof (buffer), abfd)
1334 /* Handle long section names. This code must handle section
1335 names just as they are handled in coff_write_object_contents. */
1336 if (bfd_coff_long_section_names (abfd))
1340 for (o = abfd->sections; o != NULL; o = o->next)
1344 len = strlen (o->name);
1347 if (bfd_bwrite (o->name, (bfd_size_type) (len + 1), abfd)
1354 for (p = abfd->outsymbols, i = 0;
1359 size_t name_length = strlen (q->name);
1360 coff_symbol_type *c_symbol = coff_symbol_from (q);
1363 /* Figure out whether the symbol name should go in the string
1364 table. Symbol names that are short enough are stored
1365 directly in the syment structure. File names permit a
1366 different, longer, length in the syment structure. On
1367 XCOFF, some symbol names are stored in the .debug section
1368 rather than in the string table. */
1370 if (c_symbol == NULL
1371 || c_symbol->native == NULL)
1372 /* This is not a COFF symbol, so it certainly is not a
1373 file name, nor does it go in the .debug section. */
1374 maxlen = bfd_coff_force_symnames_in_strings (abfd) ? 0 : SYMNMLEN;
1376 else if (! c_symbol->native->is_sym)
1377 maxlen = bfd_coff_force_symnames_in_strings (abfd) ? 0 : SYMNMLEN;
1379 else if (bfd_coff_symname_in_debug (abfd,
1380 &c_symbol->native->u.syment))
1381 /* This symbol name is in the XCOFF .debug section.
1382 Don't write it into the string table. */
1383 maxlen = name_length;
1385 else if (c_symbol->native->u.syment.n_sclass == C_FILE
1386 && c_symbol->native->u.syment.n_numaux > 0)
1388 if (bfd_coff_force_symnames_in_strings (abfd))
1390 if (bfd_bwrite (".file", (bfd_size_type) 6, abfd) != 6)
1393 maxlen = bfd_coff_filnmlen (abfd);
1396 maxlen = bfd_coff_force_symnames_in_strings (abfd) ? 0 : SYMNMLEN;
1398 if (name_length > maxlen)
1400 if (bfd_bwrite ((void *) (q->name), (bfd_size_type) name_length + 1,
1401 abfd) != name_length + 1)
1408 /* We would normally not write anything here, but we'll write
1409 out 4 so that any stupid coff reader which tries to read the
1410 string table even when there isn't one won't croak. */
1411 unsigned int size = STRING_SIZE_SIZE;
1412 bfd_byte buffer[STRING_SIZE_SIZE];
1414 #if STRING_SIZE_SIZE == 4
1415 H_PUT_32 (abfd, size, buffer);
1417 #error Change H_PUT_32
1419 if (bfd_bwrite ((void *) buffer, (bfd_size_type) STRING_SIZE_SIZE, abfd)
1420 != STRING_SIZE_SIZE)
1424 /* Make sure the .debug section was created to be the correct size.
1425 We should create it ourselves on the fly, but we don't because
1426 BFD won't let us write to any section until we know how large all
1427 the sections are. We could still do it by making another pass
1428 over the symbols. FIXME. */
1429 BFD_ASSERT (debug_string_size == 0
1430 || (debug_string_section != (asection *) NULL
1431 && (BFD_ALIGN (debug_string_size,
1432 1 << debug_string_section->alignment_power)
1433 == debug_string_section->size)));
1439 coff_write_linenumbers (bfd *abfd)
1442 bfd_size_type linesz;
1445 linesz = bfd_coff_linesz (abfd);
1446 buff = bfd_alloc (abfd, linesz);
1449 for (s = abfd->sections; s != (asection *) NULL; s = s->next)
1451 if (s->lineno_count)
1453 asymbol **q = abfd->outsymbols;
1454 if (bfd_seek (abfd, s->line_filepos, SEEK_SET) != 0)
1456 /* Find all the linenumbers in this section. */
1460 if (p->section->output_section == s)
1463 BFD_SEND (bfd_asymbol_bfd (p), _get_lineno,
1464 (bfd_asymbol_bfd (p), p));
1467 /* Found a linenumber entry, output. */
1468 struct internal_lineno out;
1470 memset ((void *) & out, 0, sizeof (out));
1472 out.l_addr.l_symndx = l->u.offset;
1473 bfd_coff_swap_lineno_out (abfd, &out, buff);
1474 if (bfd_bwrite (buff, (bfd_size_type) linesz, abfd)
1478 while (l->line_number)
1480 out.l_lnno = l->line_number;
1481 out.l_addr.l_symndx = l->u.offset;
1482 bfd_coff_swap_lineno_out (abfd, &out, buff);
1483 if (bfd_bwrite (buff, (bfd_size_type) linesz, abfd)
1494 bfd_release (abfd, buff);
1499 coff_get_lineno (bfd *ignore_abfd ATTRIBUTE_UNUSED, asymbol *symbol)
1501 return coffsymbol (symbol)->lineno;
1504 /* This function transforms the offsets into the symbol table into
1505 pointers to syments. */
1508 coff_pointerize_aux (bfd *abfd,
1509 combined_entry_type *table_base,
1510 combined_entry_type *symbol,
1511 unsigned int indaux,
1512 combined_entry_type *auxent)
1514 unsigned int type = symbol->u.syment.n_type;
1515 unsigned int n_sclass = symbol->u.syment.n_sclass;
1517 BFD_ASSERT (symbol->is_sym);
1518 if (coff_backend_info (abfd)->_bfd_coff_pointerize_aux_hook)
1520 if ((*coff_backend_info (abfd)->_bfd_coff_pointerize_aux_hook)
1521 (abfd, table_base, symbol, indaux, auxent))
1525 /* Don't bother if this is a file or a section. */
1526 if (n_sclass == C_STAT && type == T_NULL)
1528 if (n_sclass == C_FILE)
1531 BFD_ASSERT (! auxent->is_sym);
1532 /* Otherwise patch up. */
1533 #define N_TMASK coff_data (abfd)->local_n_tmask
1534 #define N_BTSHFT coff_data (abfd)->local_n_btshft
1536 if ((ISFCN (type) || ISTAG (n_sclass) || n_sclass == C_BLOCK
1537 || n_sclass == C_FCN)
1538 && auxent->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.l > 0)
1540 auxent->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.p =
1541 table_base + auxent->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.l;
1542 auxent->fix_end = 1;
1544 /* A negative tagndx is meaningless, but the SCO 3.2v4 cc can
1545 generate one, so we must be careful to ignore it. */
1546 if (auxent->u.auxent.x_sym.x_tagndx.l > 0)
1548 auxent->u.auxent.x_sym.x_tagndx.p =
1549 table_base + auxent->u.auxent.x_sym.x_tagndx.l;
1550 auxent->fix_tag = 1;
1554 /* Allocate space for the ".debug" section, and read it.
1555 We did not read the debug section until now, because
1556 we didn't want to go to the trouble until someone needed it. */
1559 build_debug_section (bfd *abfd, asection ** sect_return)
1561 char *debug_section;
1563 bfd_size_type sec_size;
1565 asection *sect = bfd_get_section_by_name (abfd, ".debug");
1569 bfd_set_error (bfd_error_no_debug_section);
1573 sec_size = sect->size;
1574 debug_section = (char *) bfd_alloc (abfd, sec_size);
1575 if (debug_section == NULL)
1578 /* Seek to the beginning of the `.debug' section and read it.
1579 Save the current position first; it is needed by our caller.
1580 Then read debug section and reset the file pointer. */
1582 position = bfd_tell (abfd);
1583 if (bfd_seek (abfd, sect->filepos, SEEK_SET) != 0
1584 || bfd_bread (debug_section, sec_size, abfd) != sec_size
1585 || bfd_seek (abfd, position, SEEK_SET) != 0)
1588 * sect_return = sect;
1589 return debug_section;
1592 /* Return a pointer to a malloc'd copy of 'name'. 'name' may not be
1593 \0-terminated, but will not exceed 'maxlen' characters. The copy *will*
1594 be \0-terminated. */
1597 copy_name (bfd *abfd, char *name, size_t maxlen)
1602 for (len = 0; len < maxlen; ++len)
1603 if (name[len] == '\0')
1606 if ((newname = (char *) bfd_alloc (abfd, (bfd_size_type) len + 1)) == NULL)
1609 strncpy (newname, name, len);
1610 newname[len] = '\0';
1614 /* Read in the external symbols. */
1617 _bfd_coff_get_external_symbols (bfd *abfd)
1619 bfd_size_type symesz;
1623 if (obj_coff_external_syms (abfd) != NULL)
1626 symesz = bfd_coff_symesz (abfd);
1628 size = obj_raw_syment_count (abfd) * symesz;
1632 syms = bfd_malloc (size);
1636 if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0
1637 || bfd_bread (syms, size, abfd) != size)
1644 obj_coff_external_syms (abfd) = syms;
1649 /* Read in the external strings. The strings are not loaded until
1650 they are needed. This is because we have no simple way of
1651 detecting a missing string table in an archive. If the strings
1652 are loaded then the STRINGS and STRINGS_LEN fields in the
1653 coff_tdata structure will be set. */
1656 _bfd_coff_read_string_table (bfd *abfd)
1658 char extstrsize[STRING_SIZE_SIZE];
1659 bfd_size_type strsize;
1663 if (obj_coff_strings (abfd) != NULL)
1664 return obj_coff_strings (abfd);
1666 if (obj_sym_filepos (abfd) == 0)
1668 bfd_set_error (bfd_error_no_symbols);
1672 pos = obj_sym_filepos (abfd);
1673 pos += obj_raw_syment_count (abfd) * bfd_coff_symesz (abfd);
1674 if (bfd_seek (abfd, pos, SEEK_SET) != 0)
1677 if (bfd_bread (extstrsize, (bfd_size_type) sizeof extstrsize, abfd)
1678 != sizeof extstrsize)
1680 if (bfd_get_error () != bfd_error_file_truncated)
1683 /* There is no string table. */
1684 strsize = STRING_SIZE_SIZE;
1688 #if STRING_SIZE_SIZE == 4
1689 strsize = H_GET_32 (abfd, extstrsize);
1691 #error Change H_GET_32
1695 if (strsize < STRING_SIZE_SIZE)
1697 (*_bfd_error_handler)
1698 (_("%B: bad string table size %lu"), abfd, (unsigned long) strsize);
1699 bfd_set_error (bfd_error_bad_value);
1703 strings = (char *) bfd_malloc (strsize + 1);
1704 if (strings == NULL)
1707 /* PR 17521 file: 079-54929-0.004.
1708 A corrupt file could contain an index that points into the first
1709 STRING_SIZE_SIZE bytes of the string table, so make sure that
1711 memset (strings, 0, STRING_SIZE_SIZE);
1713 if (bfd_bread (strings + STRING_SIZE_SIZE, strsize - STRING_SIZE_SIZE, abfd)
1714 != strsize - STRING_SIZE_SIZE)
1720 obj_coff_strings (abfd) = strings;
1721 obj_coff_strings_len (abfd) = strsize;
1722 /* Terminate the string table, just in case. */
1723 strings[strsize] = 0;
1727 /* Free up the external symbols and strings read from a COFF file. */
1730 _bfd_coff_free_symbols (bfd *abfd)
1732 if (obj_coff_external_syms (abfd) != NULL
1733 && ! obj_coff_keep_syms (abfd))
1735 free (obj_coff_external_syms (abfd));
1736 obj_coff_external_syms (abfd) = NULL;
1738 if (obj_coff_strings (abfd) != NULL
1739 && ! obj_coff_keep_strings (abfd))
1741 free (obj_coff_strings (abfd));
1742 obj_coff_strings (abfd) = NULL;
1743 obj_coff_strings_len (abfd) = 0;
1748 /* Read a symbol table into freshly bfd_allocated memory, swap it, and
1749 knit the symbol names into a normalized form. By normalized here I
1750 mean that all symbols have an n_offset pointer that points to a null-
1751 terminated string. */
1753 combined_entry_type *
1754 coff_get_normalized_symtab (bfd *abfd)
1756 combined_entry_type *internal;
1757 combined_entry_type *internal_ptr;
1758 combined_entry_type *symbol_ptr;
1759 combined_entry_type *internal_end;
1763 const char *string_table = NULL;
1764 asection * debug_sec = NULL;
1765 char *debug_sec_data = NULL;
1768 if (obj_raw_syments (abfd) != NULL)
1769 return obj_raw_syments (abfd);
1771 if (! _bfd_coff_get_external_symbols (abfd))
1774 size = obj_raw_syment_count (abfd) * sizeof (combined_entry_type);
1775 internal = (combined_entry_type *) bfd_zalloc (abfd, size);
1776 if (internal == NULL && size != 0)
1778 internal_end = internal + obj_raw_syment_count (abfd);
1780 raw_src = (char *) obj_coff_external_syms (abfd);
1782 /* Mark the end of the symbols. */
1783 symesz = bfd_coff_symesz (abfd);
1784 raw_end = (char *) raw_src + obj_raw_syment_count (abfd) * symesz;
1786 /* FIXME SOMEDAY. A string table size of zero is very weird, but
1787 probably possible. If one shows up, it will probably kill us. */
1789 /* Swap all the raw entries. */
1790 for (internal_ptr = internal;
1792 raw_src += symesz, internal_ptr++)
1796 bfd_coff_swap_sym_in (abfd, (void *) raw_src,
1797 (void *) & internal_ptr->u.syment);
1798 symbol_ptr = internal_ptr;
1799 internal_ptr->is_sym = TRUE;
1801 /* PR 17512: file: 1353-1166-0.004. */
1802 if (symbol_ptr->u.syment.n_sclass == C_FILE
1803 && symbol_ptr->u.syment.n_numaux > 0
1804 && raw_src + symesz + symbol_ptr->u.syment.n_numaux
1805 * sizeof (union internal_auxent) >= raw_end)
1807 bfd_release (abfd, internal);
1812 i < symbol_ptr->u.syment.n_numaux;
1816 /* PR 17512: Prevent buffer overrun. */
1817 if (internal_ptr >= internal_end)
1819 bfd_release (abfd, internal);
1825 bfd_coff_swap_aux_in (abfd, (void *) raw_src,
1826 symbol_ptr->u.syment.n_type,
1827 symbol_ptr->u.syment.n_sclass,
1828 (int) i, symbol_ptr->u.syment.n_numaux,
1829 &(internal_ptr->u.auxent));
1831 internal_ptr->is_sym = FALSE;
1832 coff_pointerize_aux (abfd, internal, symbol_ptr, i,
1837 /* Free the raw symbols, but not the strings (if we have them). */
1838 obj_coff_keep_strings (abfd) = TRUE;
1839 if (! _bfd_coff_free_symbols (abfd))
1842 for (internal_ptr = internal; internal_ptr < internal_end;
1845 BFD_ASSERT (internal_ptr->is_sym);
1847 if (internal_ptr->u.syment.n_sclass == C_FILE
1848 && internal_ptr->u.syment.n_numaux > 0)
1850 combined_entry_type * aux = internal_ptr + 1;
1852 /* Make a file symbol point to the name in the auxent, since
1853 the text ".file" is redundant. */
1854 BFD_ASSERT (! aux->is_sym);
1856 if (aux->u.auxent.x_file.x_n.x_zeroes == 0)
1858 /* The filename is a long one, point into the string table. */
1859 if (string_table == NULL)
1861 string_table = _bfd_coff_read_string_table (abfd);
1862 if (string_table == NULL)
1866 if ((bfd_size_type)(aux->u.auxent.x_file.x_n.x_offset)
1867 >= obj_coff_strings_len (abfd))
1868 internal_ptr->u.syment._n._n_n._n_offset = (bfd_hostptr_t) _("<corrupt>");
1870 internal_ptr->u.syment._n._n_n._n_offset =
1871 (bfd_hostptr_t) (string_table + (aux->u.auxent.x_file.x_n.x_offset));
1875 /* Ordinary short filename, put into memory anyway. The
1876 Microsoft PE tools sometimes store a filename in
1877 multiple AUX entries. */
1878 if (internal_ptr->u.syment.n_numaux > 1
1879 && coff_data (abfd)->pe)
1880 internal_ptr->u.syment._n._n_n._n_offset =
1883 aux->u.auxent.x_file.x_fname,
1884 internal_ptr->u.syment.n_numaux * symesz);
1886 internal_ptr->u.syment._n._n_n._n_offset =
1889 aux->u.auxent.x_file.x_fname,
1890 (size_t) bfd_coff_filnmlen (abfd)));
1895 if (internal_ptr->u.syment._n._n_n._n_zeroes != 0)
1897 /* This is a "short" name. Make it long. */
1901 /* Find the length of this string without walking into memory
1903 for (i = 0; i < 8; ++i)
1904 if (internal_ptr->u.syment._n._n_name[i] == '\0')
1907 newstring = (char *) bfd_zalloc (abfd, (bfd_size_type) (i + 1));
1908 if (newstring == NULL)
1910 strncpy (newstring, internal_ptr->u.syment._n._n_name, i);
1911 internal_ptr->u.syment._n._n_n._n_offset = (bfd_hostptr_t) newstring;
1912 internal_ptr->u.syment._n._n_n._n_zeroes = 0;
1914 else if (internal_ptr->u.syment._n._n_n._n_offset == 0)
1915 internal_ptr->u.syment._n._n_n._n_offset = (bfd_hostptr_t) "";
1916 else if (!bfd_coff_symname_in_debug (abfd, &internal_ptr->u.syment))
1918 /* Long name already. Point symbol at the string in the
1920 if (string_table == NULL)
1922 string_table = _bfd_coff_read_string_table (abfd);
1923 if (string_table == NULL)
1926 if (internal_ptr->u.syment._n._n_n._n_offset >= obj_coff_strings_len (abfd)
1927 || string_table + internal_ptr->u.syment._n._n_n._n_offset < string_table)
1928 internal_ptr->u.syment._n._n_n._n_offset = (bfd_hostptr_t) _("<corrupt>");
1930 internal_ptr->u.syment._n._n_n._n_offset =
1933 + internal_ptr->u.syment._n._n_n._n_offset));
1937 /* Long name in debug section. Very similar. */
1938 if (debug_sec_data == NULL)
1939 debug_sec_data = build_debug_section (abfd, & debug_sec);
1940 if (debug_sec_data != NULL)
1942 BFD_ASSERT (debug_sec != NULL);
1943 /* PR binutils/17512: Catch out of range offsets into the debug data. */
1944 if (internal_ptr->u.syment._n._n_n._n_offset > debug_sec->size
1945 || debug_sec_data + internal_ptr->u.syment._n._n_n._n_offset < debug_sec_data)
1946 internal_ptr->u.syment._n._n_n._n_offset = (bfd_hostptr_t) _("<corrupt>");
1948 internal_ptr->u.syment._n._n_n._n_offset = (bfd_hostptr_t)
1949 (debug_sec_data + internal_ptr->u.syment._n._n_n._n_offset);
1952 internal_ptr->u.syment._n._n_n._n_offset = (bfd_hostptr_t) "";
1955 internal_ptr += internal_ptr->u.syment.n_numaux;
1958 obj_raw_syments (abfd) = internal;
1959 BFD_ASSERT (obj_raw_syment_count (abfd)
1960 == (unsigned int) (internal_ptr - internal));
1966 coff_get_reloc_upper_bound (bfd *abfd, sec_ptr asect)
1968 if (bfd_get_format (abfd) != bfd_object)
1970 bfd_set_error (bfd_error_invalid_operation);
1973 return (asect->reloc_count + 1) * sizeof (arelent *);
1977 coff_make_empty_symbol (bfd *abfd)
1979 bfd_size_type amt = sizeof (coff_symbol_type);
1980 coff_symbol_type *new_symbol = (coff_symbol_type *) bfd_zalloc (abfd, amt);
1982 if (new_symbol == NULL)
1984 new_symbol->symbol.section = 0;
1985 new_symbol->native = NULL;
1986 new_symbol->lineno = NULL;
1987 new_symbol->done_lineno = FALSE;
1988 new_symbol->symbol.the_bfd = abfd;
1990 return & new_symbol->symbol;
1993 /* Make a debugging symbol. */
1996 coff_bfd_make_debug_symbol (bfd *abfd,
1997 void * ptr ATTRIBUTE_UNUSED,
1998 unsigned long sz ATTRIBUTE_UNUSED)
2000 bfd_size_type amt = sizeof (coff_symbol_type);
2001 coff_symbol_type *new_symbol = (coff_symbol_type *) bfd_alloc (abfd, amt);
2003 if (new_symbol == NULL)
2005 /* @@ The 10 is a guess at a plausible maximum number of aux entries
2006 (but shouldn't be a constant). */
2007 amt = sizeof (combined_entry_type) * 10;
2008 new_symbol->native = (combined_entry_type *) bfd_zalloc (abfd, amt);
2009 if (!new_symbol->native)
2011 new_symbol->native->is_sym = TRUE;
2012 new_symbol->symbol.section = bfd_abs_section_ptr;
2013 new_symbol->symbol.flags = BSF_DEBUGGING;
2014 new_symbol->lineno = NULL;
2015 new_symbol->done_lineno = FALSE;
2016 new_symbol->symbol.the_bfd = abfd;
2018 return & new_symbol->symbol;
2022 coff_get_symbol_info (bfd *abfd, asymbol *symbol, symbol_info *ret)
2024 bfd_symbol_info (symbol, ret);
2026 if (coffsymbol (symbol)->native != NULL
2027 && coffsymbol (symbol)->native->fix_value
2028 && coffsymbol (symbol)->native->is_sym)
2029 ret->value = coffsymbol (symbol)->native->u.syment.n_value -
2030 (bfd_hostptr_t) obj_raw_syments (abfd);
2033 /* Print out information about COFF symbol. */
2036 coff_print_symbol (bfd *abfd,
2039 bfd_print_symbol_type how)
2041 FILE * file = (FILE *) filep;
2045 case bfd_print_symbol_name:
2046 fprintf (file, "%s", symbol->name);
2049 case bfd_print_symbol_more:
2050 fprintf (file, "coff %s %s",
2051 coffsymbol (symbol)->native ? "n" : "g",
2052 coffsymbol (symbol)->lineno ? "l" : " ");
2055 case bfd_print_symbol_all:
2056 if (coffsymbol (symbol)->native)
2060 combined_entry_type *combined = coffsymbol (symbol)->native;
2061 combined_entry_type *root = obj_raw_syments (abfd);
2062 struct lineno_cache_entry *l = coffsymbol (symbol)->lineno;
2064 fprintf (file, "[%3ld]", (long) (combined - root));
2066 /* PR 17512: file: 079-33786-0.001:0.1. */
2067 if (combined < obj_raw_syments (abfd)
2068 || combined >= obj_raw_syments (abfd) + obj_raw_syment_count (abfd))
2070 fprintf (file, _("<corrupt info> %s"), symbol->name);
2074 BFD_ASSERT (combined->is_sym);
2075 if (! combined->fix_value)
2076 val = (bfd_vma) combined->u.syment.n_value;
2078 val = combined->u.syment.n_value - (bfd_hostptr_t) root;
2080 fprintf (file, "(sec %2d)(fl 0x%02x)(ty %3x)(scl %3d) (nx %d) 0x",
2081 combined->u.syment.n_scnum,
2082 combined->u.syment.n_flags,
2083 combined->u.syment.n_type,
2084 combined->u.syment.n_sclass,
2085 combined->u.syment.n_numaux);
2086 bfd_fprintf_vma (abfd, file, val);
2087 fprintf (file, " %s", symbol->name);
2089 for (aux = 0; aux < combined->u.syment.n_numaux; aux++)
2091 combined_entry_type *auxp = combined + aux + 1;
2094 BFD_ASSERT (! auxp->is_sym);
2096 tagndx = auxp->u.auxent.x_sym.x_tagndx.p - root;
2098 tagndx = auxp->u.auxent.x_sym.x_tagndx.l;
2100 fprintf (file, "\n");
2102 if (bfd_coff_print_aux (abfd, file, root, combined, auxp, aux))
2105 switch (combined->u.syment.n_sclass)
2108 fprintf (file, "File ");
2112 if (combined->u.syment.n_type == T_NULL)
2113 /* Probably a section symbol ? */
2115 fprintf (file, "AUX scnlen 0x%lx nreloc %d nlnno %d",
2116 (unsigned long) auxp->u.auxent.x_scn.x_scnlen,
2117 auxp->u.auxent.x_scn.x_nreloc,
2118 auxp->u.auxent.x_scn.x_nlinno);
2119 if (auxp->u.auxent.x_scn.x_checksum != 0
2120 || auxp->u.auxent.x_scn.x_associated != 0
2121 || auxp->u.auxent.x_scn.x_comdat != 0)
2122 fprintf (file, " checksum 0x%lx assoc %d comdat %d",
2123 auxp->u.auxent.x_scn.x_checksum,
2124 auxp->u.auxent.x_scn.x_associated,
2125 auxp->u.auxent.x_scn.x_comdat);
2128 /* Otherwise fall through. */
2131 if (ISFCN (combined->u.syment.n_type))
2136 next = (auxp->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.p
2139 next = auxp->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.l;
2140 llnos = auxp->u.auxent.x_sym.x_fcnary.x_fcn.x_lnnoptr;
2142 "AUX tagndx %ld ttlsiz 0x%lx lnnos %ld next %ld",
2144 (unsigned long) auxp->u.auxent.x_sym.x_misc.x_fsize,
2148 /* Otherwise fall through. */
2150 fprintf (file, "AUX lnno %d size 0x%x tagndx %ld",
2151 auxp->u.auxent.x_sym.x_misc.x_lnsz.x_lnno,
2152 auxp->u.auxent.x_sym.x_misc.x_lnsz.x_size,
2155 fprintf (file, " endndx %ld",
2157 (auxp->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.p
2165 fprintf (file, "\n%s :", l->u.sym->name);
2167 while (l->line_number)
2169 if (l->line_number > 0)
2171 fprintf (file, "\n%4d : ", l->line_number);
2172 bfd_fprintf_vma (abfd, file, l->u.offset + symbol->section->vma);
2180 bfd_print_symbol_vandf (abfd, (void *) file, symbol);
2181 fprintf (file, " %-5s %s %s %s",
2182 symbol->section->name,
2183 coffsymbol (symbol)->native ? "n" : "g",
2184 coffsymbol (symbol)->lineno ? "l" : " ",
2190 /* Return whether a symbol name implies a local symbol. In COFF,
2191 local symbols generally start with ``.L''. Most targets use this
2192 function for the is_local_label_name entry point, but some may
2196 _bfd_coff_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
2199 return name[0] == '.' && name[1] == 'L';
2202 /* Provided a BFD, a section and an offset (in bytes, not octets) into the
2203 section, calculate and return the name of the source file and the line
2204 nearest to the wanted location. */
2207 coff_find_nearest_line_with_names (bfd *abfd,
2211 const char **filename_ptr,
2212 const char **functionname_ptr,
2213 unsigned int *line_ptr,
2214 const struct dwarf_debug_section *debug_sections)
2218 unsigned int line_base;
2219 coff_data_type *cof = coff_data (abfd);
2220 /* Run through the raw syments if available. */
2221 combined_entry_type *p;
2222 combined_entry_type *pend;
2224 struct coff_section_tdata *sec_data;
2227 /* Before looking through the symbol table, try to use a .stab
2228 section to find the information. */
2229 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
2230 &found, filename_ptr,
2231 functionname_ptr, line_ptr,
2232 &coff_data(abfd)->line_info))
2238 /* Also try examining DWARF2 debugging information. */
2239 if (_bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset,
2240 filename_ptr, functionname_ptr,
2241 line_ptr, NULL, debug_sections, 0,
2242 &coff_data(abfd)->dwarf2_find_line_info))
2246 *functionname_ptr = 0;
2249 /* Don't try and find line numbers in a non coff file. */
2250 if (!bfd_family_coff (abfd))
2256 /* Find the first C_FILE symbol. */
2257 p = cof->raw_syments;
2261 pend = p + cof->raw_syment_count;
2264 BFD_ASSERT (p->is_sym);
2265 if (p->u.syment.n_sclass == C_FILE)
2267 p += 1 + p->u.syment.n_numaux;
2275 /* Look through the C_FILE symbols to find the best one. */
2276 sec_vma = bfd_get_section_vma (abfd, section);
2277 *filename_ptr = (char *) p->u.syment._n._n_n._n_offset;
2278 maxdiff = (bfd_vma) 0 - (bfd_vma) 1;
2282 combined_entry_type *p2;
2284 for (p2 = p + 1 + p->u.syment.n_numaux;
2286 p2 += 1 + p2->u.syment.n_numaux)
2288 BFD_ASSERT (p2->is_sym);
2289 if (p2->u.syment.n_scnum > 0
2291 == coff_section_from_bfd_index (abfd,
2292 p2->u.syment.n_scnum)))
2294 if (p2->u.syment.n_sclass == C_FILE)
2303 file_addr = (bfd_vma) p2->u.syment.n_value;
2304 /* PR 11512: Include the section address of the function name symbol. */
2305 if (p2->u.syment.n_scnum > 0)
2306 file_addr += coff_section_from_bfd_index (abfd,
2307 p2->u.syment.n_scnum)->vma;
2308 /* We use <= MAXDIFF here so that if we get a zero length
2309 file, we actually use the next file entry. */
2311 && offset + sec_vma >= file_addr
2312 && offset + sec_vma - file_addr <= maxdiff)
2314 *filename_ptr = (char *) p->u.syment._n._n_n._n_offset;
2315 maxdiff = offset + sec_vma - p2->u.syment.n_value;
2318 /* Avoid endless loops on erroneous files by ensuring that
2319 we always move forward in the file. */
2320 if (p >= cof->raw_syments + p->u.syment.n_value)
2323 p = cof->raw_syments + p->u.syment.n_value;
2324 if (p > pend || p->u.syment.n_sclass != C_FILE)
2329 /* Now wander though the raw linenumbers of the section. */
2330 /* If we have been called on this section before, and the offset we
2331 want is further down then we can prime the lookup loop. */
2332 sec_data = coff_section_data (abfd, section);
2333 if (sec_data != NULL
2335 && offset >= sec_data->offset)
2338 *functionname_ptr = sec_data->function;
2339 line_base = sec_data->line_base;
2347 if (section->lineno != NULL)
2349 bfd_vma last_value = 0;
2351 l = §ion->lineno[i];
2353 for (; i < section->lineno_count; i++)
2355 if (l->line_number == 0)
2357 /* Get the symbol this line number points at. */
2358 coff_symbol_type *coff = (coff_symbol_type *) (l->u.sym);
2359 if (coff->symbol.value > offset)
2361 *functionname_ptr = coff->symbol.name;
2362 last_value = coff->symbol.value;
2365 combined_entry_type *s = coff->native;
2367 BFD_ASSERT (s->is_sym);
2368 s = s + 1 + s->u.syment.n_numaux;
2370 /* In XCOFF a debugging symbol can follow the
2372 if (s->u.syment.n_scnum == N_DEBUG)
2373 s = s + 1 + s->u.syment.n_numaux;
2375 /* S should now point to the .bf of the function. */
2376 if (s->u.syment.n_numaux)
2378 /* The linenumber is stored in the auxent. */
2379 union internal_auxent *a = &((s + 1)->u.auxent);
2381 line_base = a->x_sym.x_misc.x_lnsz.x_lnno;
2382 *line_ptr = line_base;
2388 if (l->u.offset > offset)
2390 *line_ptr = l->line_number + line_base - 1;
2395 /* If we fell off the end of the loop, then assume that this
2396 symbol has no line number info. Otherwise, symbols with no
2397 line number info get reported with the line number of the
2398 last line of the last symbol which does have line number
2399 info. We use 0x100 as a slop to account for cases where the
2400 last line has executable code. */
2401 if (i >= section->lineno_count
2403 && offset - last_value > 0x100)
2405 *functionname_ptr = NULL;
2410 /* Cache the results for the next call. */
2411 if (sec_data == NULL && section->owner == abfd)
2413 amt = sizeof (struct coff_section_tdata);
2414 section->used_by_bfd = bfd_zalloc (abfd, amt);
2415 sec_data = (struct coff_section_tdata *) section->used_by_bfd;
2417 if (sec_data != NULL)
2419 sec_data->offset = offset;
2420 sec_data->i = i - 1;
2421 sec_data->function = *functionname_ptr;
2422 sec_data->line_base = line_base;
2429 coff_find_nearest_line (bfd *abfd,
2433 const char **filename_ptr,
2434 const char **functionname_ptr,
2435 unsigned int *line_ptr,
2436 unsigned int *discriminator_ptr)
2438 if (discriminator_ptr)
2439 *discriminator_ptr = 0;
2440 return coff_find_nearest_line_with_names (abfd, symbols, section, offset,
2441 filename_ptr, functionname_ptr,
2442 line_ptr, dwarf_debug_sections);
2446 coff_find_inliner_info (bfd *abfd,
2447 const char **filename_ptr,
2448 const char **functionname_ptr,
2449 unsigned int *line_ptr)
2453 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
2454 functionname_ptr, line_ptr,
2455 &coff_data(abfd)->dwarf2_find_line_info);
2460 coff_sizeof_headers (bfd *abfd, struct bfd_link_info *info)
2464 if (!info->relocatable)
2465 size = bfd_coff_filhsz (abfd) + bfd_coff_aoutsz (abfd);
2467 size = bfd_coff_filhsz (abfd);
2469 size += abfd->section_count * bfd_coff_scnhsz (abfd);
2473 /* Change the class of a coff symbol held by BFD. */
2476 bfd_coff_set_symbol_class (bfd * abfd,
2478 unsigned int symbol_class)
2480 coff_symbol_type * csym;
2482 csym = coff_symbol_from (symbol);
2485 bfd_set_error (bfd_error_invalid_operation);
2488 else if (csym->native == NULL)
2490 /* This is an alien symbol which no native coff backend data.
2491 We cheat here by creating a fake native entry for it and
2492 then filling in the class. This code is based on that in
2493 coff_write_alien_symbol(). */
2495 combined_entry_type * native;
2496 bfd_size_type amt = sizeof (* native);
2498 native = (combined_entry_type *) bfd_zalloc (abfd, amt);
2502 native->is_sym = TRUE;
2503 native->u.syment.n_type = T_NULL;
2504 native->u.syment.n_sclass = symbol_class;
2506 if (bfd_is_und_section (symbol->section))
2508 native->u.syment.n_scnum = N_UNDEF;
2509 native->u.syment.n_value = symbol->value;
2511 else if (bfd_is_com_section (symbol->section))
2513 native->u.syment.n_scnum = N_UNDEF;
2514 native->u.syment.n_value = symbol->value;
2518 native->u.syment.n_scnum =
2519 symbol->section->output_section->target_index;
2520 native->u.syment.n_value = (symbol->value
2521 + symbol->section->output_offset);
2522 if (! obj_pe (abfd))
2523 native->u.syment.n_value += symbol->section->output_section->vma;
2525 /* Copy the any flags from the file header into the symbol.
2527 native->u.syment.n_flags = bfd_asymbol_bfd (& csym->symbol)->flags;
2530 csym->native = native;
2533 csym->native->u.syment.n_sclass = symbol_class;
2539 _bfd_coff_section_already_linked (bfd *abfd,
2541 struct bfd_link_info *info)
2544 const char *name, *key;
2545 struct bfd_section_already_linked *l;
2546 struct bfd_section_already_linked_hash_entry *already_linked_list;
2547 struct coff_comdat_info *s_comdat;
2550 if ((flags & SEC_LINK_ONCE) == 0)
2553 /* The COFF backend linker doesn't support group sections. */
2554 if ((flags & SEC_GROUP) != 0)
2557 name = bfd_get_section_name (abfd, sec);
2558 s_comdat = bfd_coff_get_comdat_section (abfd, sec);
2560 if (s_comdat != NULL)
2561 key = s_comdat->name;
2564 if (CONST_STRNEQ (name, ".gnu.linkonce.")
2565 && (key = strchr (name + sizeof (".gnu.linkonce.") - 1, '.')) != NULL)
2568 /* FIXME: gcc as of 2011-09 emits sections like .text$<key>,
2569 .xdata$<key> and .pdata$<key> only the first of which has a
2570 comdat key. Should these all match the LTO IR key? */
2574 already_linked_list = bfd_section_already_linked_table_lookup (key);
2576 for (l = already_linked_list->entry; l != NULL; l = l->next)
2578 struct coff_comdat_info *l_comdat;
2580 l_comdat = bfd_coff_get_comdat_section (l->sec->owner, l->sec);
2582 /* The section names must match, and both sections must be
2583 comdat and have the same comdat name, or both sections must
2584 be non-comdat. LTO IR plugin sections are an exception. They
2585 are always named .gnu.linkonce.t.<key> (<key> is some string)
2586 and match any comdat section with comdat name of <key>, and
2587 any linkonce section with the same suffix, ie.
2588 .gnu.linkonce.*.<key>. */
2589 if (((s_comdat != NULL) == (l_comdat != NULL)
2590 && strcmp (name, l->sec->name) == 0)
2591 || (l->sec->owner->flags & BFD_PLUGIN) != 0)
2593 /* The section has already been linked. See if we should
2595 return _bfd_handle_already_linked (sec, l, info);
2599 /* This is the first section with this name. Record it. */
2600 if (!bfd_section_already_linked_table_insert (already_linked_list, sec))
2601 info->callbacks->einfo (_("%F%P: already_linked_table: %E\n"));