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[binutils.git] / bfd / coffgen.c
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1 /* Support for the generic parts of COFF, for BFD.
2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
3 2000, 2001, 2002, 2003, 2004, 2005
4 Free Software Foundation, Inc.
5 Written by Cygnus Support.
7 This file is part of BFD, the Binary File Descriptor library.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
23 /* Most of this hacked by Steve Chamberlain, sac@cygnus.com.
24 Split out of coffcode.h by Ian Taylor, ian@cygnus.com. */
26 /* This file contains COFF code that is not dependent on any
27 particular COFF target. There is only one version of this file in
28 libbfd.a, so no target specific code may be put in here. Or, to
29 put it another way,
31 ********** DO NOT PUT TARGET SPECIFIC CODE IN THIS FILE **********
33 If you need to add some target specific behaviour, add a new hook
34 function to bfd_coff_backend_data.
36 Some of these functions are also called by the ECOFF routines.
37 Those functions may not use any COFF specific information, such as
38 coff_data (abfd). */
40 #include "bfd.h"
41 #include "sysdep.h"
42 #include "libbfd.h"
43 #include "coff/internal.h"
44 #include "libcoff.h"
46 /* Take a section header read from a coff file (in HOST byte order),
47 and make a BFD "section" out of it. This is used by ECOFF. */
49 static bfd_boolean
50 make_a_section_from_file (bfd *abfd,
51 struct internal_scnhdr *hdr,
52 unsigned int target_index)
54 asection *return_section;
55 char *name;
56 bfd_boolean result = TRUE;
57 flagword flags;
59 name = NULL;
61 /* Handle long section names as in PE. */
62 if (bfd_coff_long_section_names (abfd)
63 && hdr->s_name[0] == '/')
65 char buf[SCNNMLEN];
66 long strindex;
67 char *p;
68 const char *strings;
70 memcpy (buf, hdr->s_name + 1, SCNNMLEN - 1);
71 buf[SCNNMLEN - 1] = '\0';
72 strindex = strtol (buf, &p, 10);
73 if (*p == '\0' && strindex >= 0)
75 strings = _bfd_coff_read_string_table (abfd);
76 if (strings == NULL)
77 return FALSE;
78 /* FIXME: For extra safety, we should make sure that
79 strindex does not run us past the end, but right now we
80 don't know the length of the string table. */
81 strings += strindex;
82 name = bfd_alloc (abfd, (bfd_size_type) strlen (strings) + 1);
83 if (name == NULL)
84 return FALSE;
85 strcpy (name, strings);
89 if (name == NULL)
91 /* Assorted wastage to null-terminate the name, thanks AT&T! */
92 name = bfd_alloc (abfd, (bfd_size_type) sizeof (hdr->s_name) + 1);
93 if (name == NULL)
94 return FALSE;
95 strncpy (name, (char *) &hdr->s_name[0], sizeof (hdr->s_name));
96 name[sizeof (hdr->s_name)] = 0;
99 return_section = bfd_make_section_anyway (abfd, name);
100 if (return_section == NULL)
101 return FALSE;
103 return_section->vma = hdr->s_vaddr;
104 return_section->lma = hdr->s_paddr;
105 return_section->size = hdr->s_size;
106 return_section->filepos = hdr->s_scnptr;
107 return_section->rel_filepos = hdr->s_relptr;
108 return_section->reloc_count = hdr->s_nreloc;
110 bfd_coff_set_alignment_hook (abfd, return_section, hdr);
112 return_section->line_filepos = hdr->s_lnnoptr;
114 return_section->lineno_count = hdr->s_nlnno;
115 return_section->userdata = NULL;
116 return_section->next = NULL;
117 return_section->target_index = target_index;
119 if (! bfd_coff_styp_to_sec_flags_hook (abfd, hdr, name, return_section,
120 & flags))
121 result = FALSE;
123 return_section->flags = flags;
125 /* At least on i386-coff, the line number count for a shared library
126 section must be ignored. */
127 if ((return_section->flags & SEC_COFF_SHARED_LIBRARY) != 0)
128 return_section->lineno_count = 0;
130 if (hdr->s_nreloc != 0)
131 return_section->flags |= SEC_RELOC;
132 /* FIXME: should this check 'hdr->s_size > 0'. */
133 if (hdr->s_scnptr != 0)
134 return_section->flags |= SEC_HAS_CONTENTS;
136 return result;
139 /* Read in a COFF object and make it into a BFD. This is used by
140 ECOFF as well. */
142 static const bfd_target *
143 coff_real_object_p (bfd *abfd,
144 unsigned nscns,
145 struct internal_filehdr *internal_f,
146 struct internal_aouthdr *internal_a)
148 flagword oflags = abfd->flags;
149 bfd_vma ostart = bfd_get_start_address (abfd);
150 void * tdata;
151 void * tdata_save;
152 bfd_size_type readsize; /* Length of file_info. */
153 unsigned int scnhsz;
154 char *external_sections;
156 if (!(internal_f->f_flags & F_RELFLG))
157 abfd->flags |= HAS_RELOC;
158 if ((internal_f->f_flags & F_EXEC))
159 abfd->flags |= EXEC_P;
160 if (!(internal_f->f_flags & F_LNNO))
161 abfd->flags |= HAS_LINENO;
162 if (!(internal_f->f_flags & F_LSYMS))
163 abfd->flags |= HAS_LOCALS;
165 /* FIXME: How can we set D_PAGED correctly? */
166 if ((internal_f->f_flags & F_EXEC) != 0)
167 abfd->flags |= D_PAGED;
169 bfd_get_symcount (abfd) = internal_f->f_nsyms;
170 if (internal_f->f_nsyms)
171 abfd->flags |= HAS_SYMS;
173 if (internal_a != (struct internal_aouthdr *) NULL)
174 bfd_get_start_address (abfd) = internal_a->entry;
175 else
176 bfd_get_start_address (abfd) = 0;
178 /* Set up the tdata area. ECOFF uses its own routine, and overrides
179 abfd->flags. */
180 tdata_save = abfd->tdata.any;
181 tdata = bfd_coff_mkobject_hook (abfd, (void *) internal_f, (void *) internal_a);
182 if (tdata == NULL)
183 goto fail2;
185 scnhsz = bfd_coff_scnhsz (abfd);
186 readsize = (bfd_size_type) nscns * scnhsz;
187 external_sections = bfd_alloc (abfd, readsize);
188 if (!external_sections)
189 goto fail;
191 if (bfd_bread ((void *) external_sections, readsize, abfd) != readsize)
192 goto fail;
194 /* Set the arch/mach *before* swapping in sections; section header swapping
195 may depend on arch/mach info. */
196 if (! bfd_coff_set_arch_mach_hook (abfd, (void *) internal_f))
197 goto fail;
199 /* Now copy data as required; construct all asections etc. */
200 if (nscns != 0)
202 unsigned int i;
203 for (i = 0; i < nscns; i++)
205 struct internal_scnhdr tmp;
206 bfd_coff_swap_scnhdr_in (abfd,
207 (void *) (external_sections + i * scnhsz),
208 (void *) & tmp);
209 if (! make_a_section_from_file (abfd, &tmp, i + 1))
210 goto fail;
214 return abfd->xvec;
216 fail:
217 bfd_release (abfd, tdata);
218 fail2:
219 abfd->tdata.any = tdata_save;
220 abfd->flags = oflags;
221 bfd_get_start_address (abfd) = ostart;
222 return (const bfd_target *) NULL;
225 /* Turn a COFF file into a BFD, but fail with bfd_error_wrong_format if it is
226 not a COFF file. This is also used by ECOFF. */
228 const bfd_target *
229 coff_object_p (bfd *abfd)
231 bfd_size_type filhsz;
232 bfd_size_type aoutsz;
233 unsigned int nscns;
234 void * filehdr;
235 struct internal_filehdr internal_f;
236 struct internal_aouthdr internal_a;
238 /* Figure out how much to read. */
239 filhsz = bfd_coff_filhsz (abfd);
240 aoutsz = bfd_coff_aoutsz (abfd);
242 filehdr = bfd_alloc (abfd, filhsz);
243 if (filehdr == NULL)
244 return NULL;
245 if (bfd_bread (filehdr, filhsz, abfd) != filhsz)
247 if (bfd_get_error () != bfd_error_system_call)
248 bfd_set_error (bfd_error_wrong_format);
249 bfd_release (abfd, filehdr);
250 return NULL;
252 bfd_coff_swap_filehdr_in (abfd, filehdr, &internal_f);
253 bfd_release (abfd, filehdr);
255 /* The XCOFF format has two sizes for the f_opthdr. SMALL_AOUTSZ
256 (less than aoutsz) used in object files and AOUTSZ (equal to
257 aoutsz) in executables. The bfd_coff_swap_aouthdr_in function
258 expects this header to be aoutsz bytes in length, so we use that
259 value in the call to bfd_alloc below. But we must be careful to
260 only read in f_opthdr bytes in the call to bfd_bread. We should
261 also attempt to catch corrupt or non-COFF binaries with a strange
262 value for f_opthdr. */
263 if (! bfd_coff_bad_format_hook (abfd, &internal_f)
264 || internal_f.f_opthdr > aoutsz)
266 bfd_set_error (bfd_error_wrong_format);
267 return NULL;
269 nscns = internal_f.f_nscns;
271 if (internal_f.f_opthdr)
273 void * opthdr;
275 opthdr = bfd_alloc (abfd, aoutsz);
276 if (opthdr == NULL)
277 return NULL;
278 if (bfd_bread (opthdr, (bfd_size_type) internal_f.f_opthdr, abfd)
279 != internal_f.f_opthdr)
281 bfd_release (abfd, opthdr);
282 return NULL;
284 bfd_coff_swap_aouthdr_in (abfd, opthdr, (void *) &internal_a);
285 bfd_release (abfd, opthdr);
288 return coff_real_object_p (abfd, nscns, &internal_f,
289 (internal_f.f_opthdr != 0
290 ? &internal_a
291 : (struct internal_aouthdr *) NULL));
294 /* Get the BFD section from a COFF symbol section number. */
296 asection *
297 coff_section_from_bfd_index (bfd *abfd, int index)
299 struct bfd_section *answer = abfd->sections;
301 if (index == N_ABS)
302 return bfd_abs_section_ptr;
303 if (index == N_UNDEF)
304 return bfd_und_section_ptr;
305 if (index == N_DEBUG)
306 return bfd_abs_section_ptr;
308 while (answer)
310 if (answer->target_index == index)
311 return answer;
312 answer = answer->next;
315 /* We should not reach this point, but the SCO 3.2v4 /lib/libc_s.a
316 has a bad symbol table in biglitpow.o. */
317 return bfd_und_section_ptr;
320 /* Get the upper bound of a COFF symbol table. */
322 long
323 coff_get_symtab_upper_bound (bfd *abfd)
325 if (!bfd_coff_slurp_symbol_table (abfd))
326 return -1;
328 return (bfd_get_symcount (abfd) + 1) * (sizeof (coff_symbol_type *));
331 /* Canonicalize a COFF symbol table. */
333 long
334 coff_canonicalize_symtab (bfd *abfd, asymbol **alocation)
336 unsigned int counter;
337 coff_symbol_type *symbase;
338 coff_symbol_type **location = (coff_symbol_type **) alocation;
340 if (!bfd_coff_slurp_symbol_table (abfd))
341 return -1;
343 symbase = obj_symbols (abfd);
344 counter = bfd_get_symcount (abfd);
345 while (counter-- > 0)
346 *location++ = symbase++;
348 *location = NULL;
350 return bfd_get_symcount (abfd);
353 /* Get the name of a symbol. The caller must pass in a buffer of size
354 >= SYMNMLEN + 1. */
356 const char *
357 _bfd_coff_internal_syment_name (bfd *abfd,
358 const struct internal_syment *sym,
359 char *buf)
361 /* FIXME: It's not clear this will work correctly if sizeof
362 (_n_zeroes) != 4. */
363 if (sym->_n._n_n._n_zeroes != 0
364 || sym->_n._n_n._n_offset == 0)
366 memcpy (buf, sym->_n._n_name, SYMNMLEN);
367 buf[SYMNMLEN] = '\0';
368 return buf;
370 else
372 const char *strings;
374 BFD_ASSERT (sym->_n._n_n._n_offset >= STRING_SIZE_SIZE);
375 strings = obj_coff_strings (abfd);
376 if (strings == NULL)
378 strings = _bfd_coff_read_string_table (abfd);
379 if (strings == NULL)
380 return NULL;
382 return strings + sym->_n._n_n._n_offset;
386 /* Read in and swap the relocs. This returns a buffer holding the
387 relocs for section SEC in file ABFD. If CACHE is TRUE and
388 INTERNAL_RELOCS is NULL, the relocs read in will be saved in case
389 the function is called again. If EXTERNAL_RELOCS is not NULL, it
390 is a buffer large enough to hold the unswapped relocs. If
391 INTERNAL_RELOCS is not NULL, it is a buffer large enough to hold
392 the swapped relocs. If REQUIRE_INTERNAL is TRUE, then the return
393 value must be INTERNAL_RELOCS. The function returns NULL on error. */
395 struct internal_reloc *
396 _bfd_coff_read_internal_relocs (bfd *abfd,
397 asection *sec,
398 bfd_boolean cache,
399 bfd_byte *external_relocs,
400 bfd_boolean require_internal,
401 struct internal_reloc *internal_relocs)
403 bfd_size_type relsz;
404 bfd_byte *free_external = NULL;
405 struct internal_reloc *free_internal = NULL;
406 bfd_byte *erel;
407 bfd_byte *erel_end;
408 struct internal_reloc *irel;
409 bfd_size_type amt;
411 if (coff_section_data (abfd, sec) != NULL
412 && coff_section_data (abfd, sec)->relocs != NULL)
414 if (! require_internal)
415 return coff_section_data (abfd, sec)->relocs;
416 memcpy (internal_relocs, coff_section_data (abfd, sec)->relocs,
417 sec->reloc_count * sizeof (struct internal_reloc));
418 return internal_relocs;
421 relsz = bfd_coff_relsz (abfd);
423 amt = sec->reloc_count * relsz;
424 if (external_relocs == NULL)
426 free_external = bfd_malloc (amt);
427 if (free_external == NULL && sec->reloc_count > 0)
428 goto error_return;
429 external_relocs = free_external;
432 if (bfd_seek (abfd, sec->rel_filepos, SEEK_SET) != 0
433 || bfd_bread (external_relocs, amt, abfd) != amt)
434 goto error_return;
436 if (internal_relocs == NULL)
438 amt = sec->reloc_count;
439 amt *= sizeof (struct internal_reloc);
440 free_internal = bfd_malloc (amt);
441 if (free_internal == NULL && sec->reloc_count > 0)
442 goto error_return;
443 internal_relocs = free_internal;
446 /* Swap in the relocs. */
447 erel = external_relocs;
448 erel_end = erel + relsz * sec->reloc_count;
449 irel = internal_relocs;
450 for (; erel < erel_end; erel += relsz, irel++)
451 bfd_coff_swap_reloc_in (abfd, (void *) erel, (void *) irel);
453 if (free_external != NULL)
455 free (free_external);
456 free_external = NULL;
459 if (cache && free_internal != NULL)
461 if (coff_section_data (abfd, sec) == NULL)
463 amt = sizeof (struct coff_section_tdata);
464 sec->used_by_bfd = bfd_zalloc (abfd, amt);
465 if (sec->used_by_bfd == NULL)
466 goto error_return;
467 coff_section_data (abfd, sec)->contents = NULL;
469 coff_section_data (abfd, sec)->relocs = free_internal;
472 return internal_relocs;
474 error_return:
475 if (free_external != NULL)
476 free (free_external);
477 if (free_internal != NULL)
478 free (free_internal);
479 return NULL;
482 /* Set lineno_count for the output sections of a COFF file. */
485 coff_count_linenumbers (bfd *abfd)
487 unsigned int limit = bfd_get_symcount (abfd);
488 unsigned int i;
489 int total = 0;
490 asymbol **p;
491 asection *s;
493 if (limit == 0)
495 /* This may be from the backend linker, in which case the
496 lineno_count in the sections is correct. */
497 for (s = abfd->sections; s != NULL; s = s->next)
498 total += s->lineno_count;
499 return total;
502 for (s = abfd->sections; s != NULL; s = s->next)
503 BFD_ASSERT (s->lineno_count == 0);
505 for (p = abfd->outsymbols, i = 0; i < limit; i++, p++)
507 asymbol *q_maybe = *p;
509 if (bfd_family_coff (bfd_asymbol_bfd (q_maybe)))
511 coff_symbol_type *q = coffsymbol (q_maybe);
513 /* The AIX 4.1 compiler can sometimes generate line numbers
514 attached to debugging symbols. We try to simply ignore
515 those here. */
516 if (q->lineno != NULL
517 && q->symbol.section->owner != NULL)
519 /* This symbol has line numbers. Increment the owning
520 section's linenumber count. */
521 alent *l = q->lineno;
525 asection * sec = q->symbol.section->output_section;
527 /* Do not try to update fields in read-only sections. */
528 if (! bfd_is_const_section (sec))
529 sec->lineno_count ++;
531 ++total;
532 ++l;
534 while (l->line_number != 0);
539 return total;
542 /* Takes a bfd and a symbol, returns a pointer to the coff specific
543 area of the symbol if there is one. */
545 coff_symbol_type *
546 coff_symbol_from (bfd *ignore_abfd ATTRIBUTE_UNUSED,
547 asymbol *symbol)
549 if (!bfd_family_coff (bfd_asymbol_bfd (symbol)))
550 return (coff_symbol_type *) NULL;
552 if (bfd_asymbol_bfd (symbol)->tdata.coff_obj_data == (coff_data_type *) NULL)
553 return (coff_symbol_type *) NULL;
555 return (coff_symbol_type *) symbol;
558 static void
559 fixup_symbol_value (bfd *abfd,
560 coff_symbol_type *coff_symbol_ptr,
561 struct internal_syment *syment)
563 /* Normalize the symbol flags. */
564 if (bfd_is_com_section (coff_symbol_ptr->symbol.section))
566 /* A common symbol is undefined with a value. */
567 syment->n_scnum = N_UNDEF;
568 syment->n_value = coff_symbol_ptr->symbol.value;
570 else if ((coff_symbol_ptr->symbol.flags & BSF_DEBUGGING) != 0
571 && (coff_symbol_ptr->symbol.flags & BSF_DEBUGGING_RELOC) == 0)
573 syment->n_value = coff_symbol_ptr->symbol.value;
575 else if (bfd_is_und_section (coff_symbol_ptr->symbol.section))
577 syment->n_scnum = N_UNDEF;
578 syment->n_value = 0;
580 /* FIXME: Do we need to handle the absolute section here? */
581 else
583 if (coff_symbol_ptr->symbol.section)
585 syment->n_scnum =
586 coff_symbol_ptr->symbol.section->output_section->target_index;
588 syment->n_value = (coff_symbol_ptr->symbol.value
589 + coff_symbol_ptr->symbol.section->output_offset);
590 if (! obj_pe (abfd))
592 syment->n_value += (syment->n_sclass == C_STATLAB)
593 ? coff_symbol_ptr->symbol.section->output_section->lma
594 : coff_symbol_ptr->symbol.section->output_section->vma;
597 else
599 BFD_ASSERT (0);
600 /* This can happen, but I don't know why yet (steve@cygnus.com) */
601 syment->n_scnum = N_ABS;
602 syment->n_value = coff_symbol_ptr->symbol.value;
607 /* Run through all the symbols in the symbol table and work out what
608 their indexes into the symbol table will be when output.
610 Coff requires that each C_FILE symbol points to the next one in the
611 chain, and that the last one points to the first external symbol. We
612 do that here too. */
614 bfd_boolean
615 coff_renumber_symbols (bfd *bfd_ptr, int *first_undef)
617 unsigned int symbol_count = bfd_get_symcount (bfd_ptr);
618 asymbol **symbol_ptr_ptr = bfd_ptr->outsymbols;
619 unsigned int native_index = 0;
620 struct internal_syment *last_file = NULL;
621 unsigned int symbol_index;
623 /* COFF demands that undefined symbols come after all other symbols.
624 Since we don't need to impose this extra knowledge on all our
625 client programs, deal with that here. Sort the symbol table;
626 just move the undefined symbols to the end, leaving the rest
627 alone. The O'Reilly book says that defined global symbols come
628 at the end before the undefined symbols, so we do that here as
629 well. */
630 /* @@ Do we have some condition we could test for, so we don't always
631 have to do this? I don't think relocatability is quite right, but
632 I'm not certain. [raeburn:19920508.1711EST] */
634 asymbol **newsyms;
635 unsigned int i;
636 bfd_size_type amt;
638 amt = sizeof (asymbol *) * ((bfd_size_type) symbol_count + 1);
639 newsyms = bfd_alloc (bfd_ptr, amt);
640 if (!newsyms)
641 return FALSE;
642 bfd_ptr->outsymbols = newsyms;
643 for (i = 0; i < symbol_count; i++)
644 if ((symbol_ptr_ptr[i]->flags & BSF_NOT_AT_END) != 0
645 || (!bfd_is_und_section (symbol_ptr_ptr[i]->section)
646 && !bfd_is_com_section (symbol_ptr_ptr[i]->section)
647 && ((symbol_ptr_ptr[i]->flags & BSF_FUNCTION) != 0
648 || ((symbol_ptr_ptr[i]->flags & (BSF_GLOBAL | BSF_WEAK))
649 == 0))))
650 *newsyms++ = symbol_ptr_ptr[i];
652 for (i = 0; i < symbol_count; i++)
653 if ((symbol_ptr_ptr[i]->flags & BSF_NOT_AT_END) == 0
654 && !bfd_is_und_section (symbol_ptr_ptr[i]->section)
655 && (bfd_is_com_section (symbol_ptr_ptr[i]->section)
656 || ((symbol_ptr_ptr[i]->flags & BSF_FUNCTION) == 0
657 && ((symbol_ptr_ptr[i]->flags & (BSF_GLOBAL | BSF_WEAK))
658 != 0))))
659 *newsyms++ = symbol_ptr_ptr[i];
661 *first_undef = newsyms - bfd_ptr->outsymbols;
663 for (i = 0; i < symbol_count; i++)
664 if ((symbol_ptr_ptr[i]->flags & BSF_NOT_AT_END) == 0
665 && bfd_is_und_section (symbol_ptr_ptr[i]->section))
666 *newsyms++ = symbol_ptr_ptr[i];
667 *newsyms = (asymbol *) NULL;
668 symbol_ptr_ptr = bfd_ptr->outsymbols;
671 for (symbol_index = 0; symbol_index < symbol_count; symbol_index++)
673 coff_symbol_type *coff_symbol_ptr = coff_symbol_from (bfd_ptr, symbol_ptr_ptr[symbol_index]);
674 symbol_ptr_ptr[symbol_index]->udata.i = symbol_index;
675 if (coff_symbol_ptr && coff_symbol_ptr->native)
677 combined_entry_type *s = coff_symbol_ptr->native;
678 int i;
680 if (s->u.syment.n_sclass == C_FILE)
682 if (last_file != NULL)
683 last_file->n_value = native_index;
684 last_file = &(s->u.syment);
686 else
687 /* Modify the symbol values according to their section and
688 type. */
689 fixup_symbol_value (bfd_ptr, coff_symbol_ptr, &(s->u.syment));
691 for (i = 0; i < s->u.syment.n_numaux + 1; i++)
692 s[i].offset = native_index++;
694 else
695 native_index++;
698 obj_conv_table_size (bfd_ptr) = native_index;
700 return TRUE;
703 /* Run thorough the symbol table again, and fix it so that all
704 pointers to entries are changed to the entries' index in the output
705 symbol table. */
707 void
708 coff_mangle_symbols (bfd *bfd_ptr)
710 unsigned int symbol_count = bfd_get_symcount (bfd_ptr);
711 asymbol **symbol_ptr_ptr = bfd_ptr->outsymbols;
712 unsigned int symbol_index;
714 for (symbol_index = 0; symbol_index < symbol_count; symbol_index++)
716 coff_symbol_type *coff_symbol_ptr =
717 coff_symbol_from (bfd_ptr, symbol_ptr_ptr[symbol_index]);
719 if (coff_symbol_ptr && coff_symbol_ptr->native)
721 int i;
722 combined_entry_type *s = coff_symbol_ptr->native;
724 if (s->fix_value)
726 /* FIXME: We should use a union here. */
727 s->u.syment.n_value =
728 (bfd_vma)((combined_entry_type *)
729 ((unsigned long) s->u.syment.n_value))->offset;
730 s->fix_value = 0;
732 if (s->fix_line)
734 /* The value is the offset into the line number entries
735 for the symbol's section. On output, the symbol's
736 section should be N_DEBUG. */
737 s->u.syment.n_value =
738 (coff_symbol_ptr->symbol.section->output_section->line_filepos
739 + s->u.syment.n_value * bfd_coff_linesz (bfd_ptr));
740 coff_symbol_ptr->symbol.section =
741 coff_section_from_bfd_index (bfd_ptr, N_DEBUG);
742 BFD_ASSERT (coff_symbol_ptr->symbol.flags & BSF_DEBUGGING);
744 for (i = 0; i < s->u.syment.n_numaux; i++)
746 combined_entry_type *a = s + i + 1;
747 if (a->fix_tag)
749 a->u.auxent.x_sym.x_tagndx.l =
750 a->u.auxent.x_sym.x_tagndx.p->offset;
751 a->fix_tag = 0;
753 if (a->fix_end)
755 a->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.l =
756 a->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.p->offset;
757 a->fix_end = 0;
759 if (a->fix_scnlen)
761 a->u.auxent.x_csect.x_scnlen.l =
762 a->u.auxent.x_csect.x_scnlen.p->offset;
763 a->fix_scnlen = 0;
770 static void
771 coff_fix_symbol_name (bfd *abfd,
772 asymbol *symbol,
773 combined_entry_type *native,
774 bfd_size_type *string_size_p,
775 asection **debug_string_section_p,
776 bfd_size_type *debug_string_size_p)
778 unsigned int name_length;
779 union internal_auxent *auxent;
780 char *name = (char *) (symbol->name);
782 if (name == NULL)
784 /* COFF symbols always have names, so we'll make one up. */
785 symbol->name = "strange";
786 name = (char *) symbol->name;
788 name_length = strlen (name);
790 if (native->u.syment.n_sclass == C_FILE
791 && native->u.syment.n_numaux > 0)
793 unsigned int filnmlen;
795 if (bfd_coff_force_symnames_in_strings (abfd))
797 native->u.syment._n._n_n._n_offset =
798 (*string_size_p + STRING_SIZE_SIZE);
799 native->u.syment._n._n_n._n_zeroes = 0;
800 *string_size_p += 6; /* strlen(".file") + 1 */
802 else
803 strncpy (native->u.syment._n._n_name, ".file", SYMNMLEN);
805 auxent = &(native + 1)->u.auxent;
807 filnmlen = bfd_coff_filnmlen (abfd);
809 if (bfd_coff_long_filenames (abfd))
811 if (name_length <= filnmlen)
812 strncpy (auxent->x_file.x_fname, name, filnmlen);
813 else
815 auxent->x_file.x_n.x_offset = *string_size_p + STRING_SIZE_SIZE;
816 auxent->x_file.x_n.x_zeroes = 0;
817 *string_size_p += name_length + 1;
820 else
822 strncpy (auxent->x_file.x_fname, name, filnmlen);
823 if (name_length > filnmlen)
824 name[filnmlen] = '\0';
827 else
829 if (name_length <= SYMNMLEN && !bfd_coff_force_symnames_in_strings (abfd))
830 /* This name will fit into the symbol neatly. */
831 strncpy (native->u.syment._n._n_name, symbol->name, SYMNMLEN);
833 else if (!bfd_coff_symname_in_debug (abfd, &native->u.syment))
835 native->u.syment._n._n_n._n_offset = (*string_size_p
836 + STRING_SIZE_SIZE);
837 native->u.syment._n._n_n._n_zeroes = 0;
838 *string_size_p += name_length + 1;
840 else
842 file_ptr filepos;
843 bfd_byte buf[4];
844 int prefix_len = bfd_coff_debug_string_prefix_length (abfd);
846 /* This name should be written into the .debug section. For
847 some reason each name is preceded by a two byte length
848 and also followed by a null byte. FIXME: We assume that
849 the .debug section has already been created, and that it
850 is large enough. */
851 if (*debug_string_section_p == (asection *) NULL)
852 *debug_string_section_p = bfd_get_section_by_name (abfd, ".debug");
853 filepos = bfd_tell (abfd);
854 if (prefix_len == 4)
855 bfd_put_32 (abfd, (bfd_vma) (name_length + 1), buf);
856 else
857 bfd_put_16 (abfd, (bfd_vma) (name_length + 1), buf);
859 if (!bfd_set_section_contents (abfd,
860 *debug_string_section_p,
861 (void *) buf,
862 (file_ptr) *debug_string_size_p,
863 (bfd_size_type) prefix_len)
864 || !bfd_set_section_contents (abfd,
865 *debug_string_section_p,
866 (void *) symbol->name,
867 (file_ptr) (*debug_string_size_p
868 + prefix_len),
869 (bfd_size_type) name_length + 1))
870 abort ();
871 if (bfd_seek (abfd, filepos, SEEK_SET) != 0)
872 abort ();
873 native->u.syment._n._n_n._n_offset =
874 *debug_string_size_p + prefix_len;
875 native->u.syment._n._n_n._n_zeroes = 0;
876 *debug_string_size_p += name_length + 1 + prefix_len;
881 /* We need to keep track of the symbol index so that when we write out
882 the relocs we can get the index for a symbol. This method is a
883 hack. FIXME. */
885 #define set_index(symbol, idx) ((symbol)->udata.i = (idx))
887 /* Write a symbol out to a COFF file. */
889 static bfd_boolean
890 coff_write_symbol (bfd *abfd,
891 asymbol *symbol,
892 combined_entry_type *native,
893 bfd_vma *written,
894 bfd_size_type *string_size_p,
895 asection **debug_string_section_p,
896 bfd_size_type *debug_string_size_p)
898 unsigned int numaux = native->u.syment.n_numaux;
899 int type = native->u.syment.n_type;
900 int class = native->u.syment.n_sclass;
901 void * buf;
902 bfd_size_type symesz;
904 if (native->u.syment.n_sclass == C_FILE)
905 symbol->flags |= BSF_DEBUGGING;
907 if (symbol->flags & BSF_DEBUGGING
908 && bfd_is_abs_section (symbol->section))
909 native->u.syment.n_scnum = N_DEBUG;
911 else if (bfd_is_abs_section (symbol->section))
912 native->u.syment.n_scnum = N_ABS;
914 else if (bfd_is_und_section (symbol->section))
915 native->u.syment.n_scnum = N_UNDEF;
917 else
918 native->u.syment.n_scnum =
919 symbol->section->output_section->target_index;
921 coff_fix_symbol_name (abfd, symbol, native, string_size_p,
922 debug_string_section_p, debug_string_size_p);
924 symesz = bfd_coff_symesz (abfd);
925 buf = bfd_alloc (abfd, symesz);
926 if (!buf)
927 return FALSE;
928 bfd_coff_swap_sym_out (abfd, &native->u.syment, buf);
929 if (bfd_bwrite (buf, symesz, abfd) != symesz)
930 return FALSE;
931 bfd_release (abfd, buf);
933 if (native->u.syment.n_numaux > 0)
935 bfd_size_type auxesz;
936 unsigned int j;
938 auxesz = bfd_coff_auxesz (abfd);
939 buf = bfd_alloc (abfd, auxesz);
940 if (!buf)
941 return FALSE;
942 for (j = 0; j < native->u.syment.n_numaux; j++)
944 bfd_coff_swap_aux_out (abfd,
945 &((native + j + 1)->u.auxent),
946 type, class, (int) j,
947 native->u.syment.n_numaux,
948 buf);
949 if (bfd_bwrite (buf, auxesz, abfd) != auxesz)
950 return FALSE;
952 bfd_release (abfd, buf);
955 /* Store the index for use when we write out the relocs. */
956 set_index (symbol, *written);
958 *written += numaux + 1;
959 return TRUE;
962 /* Write out a symbol to a COFF file that does not come from a COFF
963 file originally. This symbol may have been created by the linker,
964 or we may be linking a non COFF file to a COFF file. */
966 static bfd_boolean
967 coff_write_alien_symbol (bfd *abfd,
968 asymbol *symbol,
969 bfd_vma *written,
970 bfd_size_type *string_size_p,
971 asection **debug_string_section_p,
972 bfd_size_type *debug_string_size_p)
974 combined_entry_type *native;
975 combined_entry_type dummy;
977 native = &dummy;
978 native->u.syment.n_type = T_NULL;
979 native->u.syment.n_flags = 0;
980 if (bfd_is_und_section (symbol->section))
982 native->u.syment.n_scnum = N_UNDEF;
983 native->u.syment.n_value = symbol->value;
985 else if (bfd_is_com_section (symbol->section))
987 native->u.syment.n_scnum = N_UNDEF;
988 native->u.syment.n_value = symbol->value;
990 else if (symbol->flags & BSF_DEBUGGING)
992 /* There isn't much point to writing out a debugging symbol
993 unless we are prepared to convert it into COFF debugging
994 format. So, we just ignore them. We must clobber the symbol
995 name to keep it from being put in the string table. */
996 symbol->name = "";
997 return TRUE;
999 else
1001 native->u.syment.n_scnum =
1002 symbol->section->output_section->target_index;
1003 native->u.syment.n_value = (symbol->value
1004 + symbol->section->output_offset);
1005 if (! obj_pe (abfd))
1006 native->u.syment.n_value += symbol->section->output_section->vma;
1008 /* Copy the any flags from the file header into the symbol.
1009 FIXME: Why? */
1011 coff_symbol_type *c = coff_symbol_from (abfd, symbol);
1012 if (c != (coff_symbol_type *) NULL)
1013 native->u.syment.n_flags = bfd_asymbol_bfd (&c->symbol)->flags;
1017 native->u.syment.n_type = 0;
1018 if (symbol->flags & BSF_LOCAL)
1019 native->u.syment.n_sclass = C_STAT;
1020 else if (symbol->flags & BSF_WEAK)
1021 native->u.syment.n_sclass = obj_pe (abfd) ? C_NT_WEAK : C_WEAKEXT;
1022 else
1023 native->u.syment.n_sclass = C_EXT;
1024 native->u.syment.n_numaux = 0;
1026 return coff_write_symbol (abfd, symbol, native, written, string_size_p,
1027 debug_string_section_p, debug_string_size_p);
1030 /* Write a native symbol to a COFF file. */
1032 static bfd_boolean
1033 coff_write_native_symbol (bfd *abfd,
1034 coff_symbol_type *symbol,
1035 bfd_vma *written,
1036 bfd_size_type *string_size_p,
1037 asection **debug_string_section_p,
1038 bfd_size_type *debug_string_size_p)
1040 combined_entry_type *native = symbol->native;
1041 alent *lineno = symbol->lineno;
1043 /* If this symbol has an associated line number, we must store the
1044 symbol index in the line number field. We also tag the auxent to
1045 point to the right place in the lineno table. */
1046 if (lineno && !symbol->done_lineno && symbol->symbol.section->owner != NULL)
1048 unsigned int count = 0;
1050 lineno[count].u.offset = *written;
1051 if (native->u.syment.n_numaux)
1053 union internal_auxent *a = &((native + 1)->u.auxent);
1055 a->x_sym.x_fcnary.x_fcn.x_lnnoptr =
1056 symbol->symbol.section->output_section->moving_line_filepos;
1059 /* Count and relocate all other linenumbers. */
1060 count++;
1061 while (lineno[count].line_number != 0)
1063 lineno[count].u.offset +=
1064 (symbol->symbol.section->output_section->vma
1065 + symbol->symbol.section->output_offset);
1066 count++;
1068 symbol->done_lineno = TRUE;
1070 if (! bfd_is_const_section (symbol->symbol.section->output_section))
1071 symbol->symbol.section->output_section->moving_line_filepos +=
1072 count * bfd_coff_linesz (abfd);
1075 return coff_write_symbol (abfd, &(symbol->symbol), native, written,
1076 string_size_p, debug_string_section_p,
1077 debug_string_size_p);
1080 /* Write out the COFF symbols. */
1082 bfd_boolean
1083 coff_write_symbols (bfd *abfd)
1085 bfd_size_type string_size;
1086 asection *debug_string_section;
1087 bfd_size_type debug_string_size;
1088 unsigned int i;
1089 unsigned int limit = bfd_get_symcount (abfd);
1090 bfd_vma written = 0;
1091 asymbol **p;
1093 string_size = 0;
1094 debug_string_section = NULL;
1095 debug_string_size = 0;
1097 /* If this target supports long section names, they must be put into
1098 the string table. This is supported by PE. This code must
1099 handle section names just as they are handled in
1100 coff_write_object_contents. */
1101 if (bfd_coff_long_section_names (abfd))
1103 asection *o;
1105 for (o = abfd->sections; o != NULL; o = o->next)
1107 size_t len;
1109 len = strlen (o->name);
1110 if (len > SCNNMLEN)
1111 string_size += len + 1;
1115 /* Seek to the right place. */
1116 if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0)
1117 return FALSE;
1119 /* Output all the symbols we have. */
1120 written = 0;
1121 for (p = abfd->outsymbols, i = 0; i < limit; i++, p++)
1123 asymbol *symbol = *p;
1124 coff_symbol_type *c_symbol = coff_symbol_from (abfd, symbol);
1126 if (c_symbol == (coff_symbol_type *) NULL
1127 || c_symbol->native == (combined_entry_type *) NULL)
1129 if (!coff_write_alien_symbol (abfd, symbol, &written, &string_size,
1130 &debug_string_section,
1131 &debug_string_size))
1132 return FALSE;
1134 else
1136 if (!coff_write_native_symbol (abfd, c_symbol, &written,
1137 &string_size, &debug_string_section,
1138 &debug_string_size))
1139 return FALSE;
1143 obj_raw_syment_count (abfd) = written;
1145 /* Now write out strings. */
1146 if (string_size != 0)
1148 unsigned int size = string_size + STRING_SIZE_SIZE;
1149 bfd_byte buffer[STRING_SIZE_SIZE];
1151 #if STRING_SIZE_SIZE == 4
1152 H_PUT_32 (abfd, size, buffer);
1153 #else
1154 #error Change H_PUT_32
1155 #endif
1156 if (bfd_bwrite ((void *) buffer, (bfd_size_type) sizeof (buffer), abfd)
1157 != sizeof (buffer))
1158 return FALSE;
1160 /* Handle long section names. This code must handle section
1161 names just as they are handled in coff_write_object_contents. */
1162 if (bfd_coff_long_section_names (abfd))
1164 asection *o;
1166 for (o = abfd->sections; o != NULL; o = o->next)
1168 size_t len;
1170 len = strlen (o->name);
1171 if (len > SCNNMLEN)
1173 if (bfd_bwrite (o->name, (bfd_size_type) (len + 1), abfd)
1174 != len + 1)
1175 return FALSE;
1180 for (p = abfd->outsymbols, i = 0;
1181 i < limit;
1182 i++, p++)
1184 asymbol *q = *p;
1185 size_t name_length = strlen (q->name);
1186 coff_symbol_type *c_symbol = coff_symbol_from (abfd, q);
1187 size_t maxlen;
1189 /* Figure out whether the symbol name should go in the string
1190 table. Symbol names that are short enough are stored
1191 directly in the syment structure. File names permit a
1192 different, longer, length in the syment structure. On
1193 XCOFF, some symbol names are stored in the .debug section
1194 rather than in the string table. */
1196 if (c_symbol == NULL
1197 || c_symbol->native == NULL)
1198 /* This is not a COFF symbol, so it certainly is not a
1199 file name, nor does it go in the .debug section. */
1200 maxlen = bfd_coff_force_symnames_in_strings (abfd) ? 0 : SYMNMLEN;
1202 else if (bfd_coff_symname_in_debug (abfd,
1203 &c_symbol->native->u.syment))
1204 /* This symbol name is in the XCOFF .debug section.
1205 Don't write it into the string table. */
1206 maxlen = name_length;
1208 else if (c_symbol->native->u.syment.n_sclass == C_FILE
1209 && c_symbol->native->u.syment.n_numaux > 0)
1211 if (bfd_coff_force_symnames_in_strings (abfd))
1213 if (bfd_bwrite (".file", (bfd_size_type) 6, abfd) != 6)
1214 return FALSE;
1216 maxlen = bfd_coff_filnmlen (abfd);
1218 else
1219 maxlen = bfd_coff_force_symnames_in_strings (abfd) ? 0 : SYMNMLEN;
1221 if (name_length > maxlen)
1223 if (bfd_bwrite ((void *) (q->name), (bfd_size_type) name_length + 1,
1224 abfd) != name_length + 1)
1225 return FALSE;
1229 else
1231 /* We would normally not write anything here, but we'll write
1232 out 4 so that any stupid coff reader which tries to read the
1233 string table even when there isn't one won't croak. */
1234 unsigned int size = STRING_SIZE_SIZE;
1235 bfd_byte buffer[STRING_SIZE_SIZE];
1237 #if STRING_SIZE_SIZE == 4
1238 H_PUT_32 (abfd, size, buffer);
1239 #else
1240 #error Change H_PUT_32
1241 #endif
1242 if (bfd_bwrite ((void *) buffer, (bfd_size_type) STRING_SIZE_SIZE, abfd)
1243 != STRING_SIZE_SIZE)
1244 return FALSE;
1247 /* Make sure the .debug section was created to be the correct size.
1248 We should create it ourselves on the fly, but we don't because
1249 BFD won't let us write to any section until we know how large all
1250 the sections are. We could still do it by making another pass
1251 over the symbols. FIXME. */
1252 BFD_ASSERT (debug_string_size == 0
1253 || (debug_string_section != (asection *) NULL
1254 && (BFD_ALIGN (debug_string_size,
1255 1 << debug_string_section->alignment_power)
1256 == debug_string_section->size)));
1258 return TRUE;
1261 bfd_boolean
1262 coff_write_linenumbers (bfd *abfd)
1264 asection *s;
1265 bfd_size_type linesz;
1266 void * buff;
1268 linesz = bfd_coff_linesz (abfd);
1269 buff = bfd_alloc (abfd, linesz);
1270 if (!buff)
1271 return FALSE;
1272 for (s = abfd->sections; s != (asection *) NULL; s = s->next)
1274 if (s->lineno_count)
1276 asymbol **q = abfd->outsymbols;
1277 if (bfd_seek (abfd, s->line_filepos, SEEK_SET) != 0)
1278 return FALSE;
1279 /* Find all the linenumbers in this section. */
1280 while (*q)
1282 asymbol *p = *q;
1283 if (p->section->output_section == s)
1285 alent *l =
1286 BFD_SEND (bfd_asymbol_bfd (p), _get_lineno,
1287 (bfd_asymbol_bfd (p), p));
1288 if (l)
1290 /* Found a linenumber entry, output. */
1291 struct internal_lineno out;
1292 memset ((void *) & out, 0, sizeof (out));
1293 out.l_lnno = 0;
1294 out.l_addr.l_symndx = l->u.offset;
1295 bfd_coff_swap_lineno_out (abfd, &out, buff);
1296 if (bfd_bwrite (buff, (bfd_size_type) linesz, abfd)
1297 != linesz)
1298 return FALSE;
1299 l++;
1300 while (l->line_number)
1302 out.l_lnno = l->line_number;
1303 out.l_addr.l_symndx = l->u.offset;
1304 bfd_coff_swap_lineno_out (abfd, &out, buff);
1305 if (bfd_bwrite (buff, (bfd_size_type) linesz, abfd)
1306 != linesz)
1307 return FALSE;
1308 l++;
1312 q++;
1316 bfd_release (abfd, buff);
1317 return TRUE;
1320 alent *
1321 coff_get_lineno (bfd *ignore_abfd ATTRIBUTE_UNUSED, asymbol *symbol)
1323 return coffsymbol (symbol)->lineno;
1326 /* This function transforms the offsets into the symbol table into
1327 pointers to syments. */
1329 static void
1330 coff_pointerize_aux (bfd *abfd,
1331 combined_entry_type *table_base,
1332 combined_entry_type *symbol,
1333 unsigned int indaux,
1334 combined_entry_type *auxent)
1336 unsigned int type = symbol->u.syment.n_type;
1337 unsigned int class = symbol->u.syment.n_sclass;
1339 if (coff_backend_info (abfd)->_bfd_coff_pointerize_aux_hook)
1341 if ((*coff_backend_info (abfd)->_bfd_coff_pointerize_aux_hook)
1342 (abfd, table_base, symbol, indaux, auxent))
1343 return;
1346 /* Don't bother if this is a file or a section. */
1347 if (class == C_STAT && type == T_NULL)
1348 return;
1349 if (class == C_FILE)
1350 return;
1352 /* Otherwise patch up. */
1353 #define N_TMASK coff_data (abfd)->local_n_tmask
1354 #define N_BTSHFT coff_data (abfd)->local_n_btshft
1356 if ((ISFCN (type) || ISTAG (class) || class == C_BLOCK || class == C_FCN)
1357 && auxent->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.l > 0)
1359 auxent->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.p =
1360 table_base + auxent->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.l;
1361 auxent->fix_end = 1;
1363 /* A negative tagndx is meaningless, but the SCO 3.2v4 cc can
1364 generate one, so we must be careful to ignore it. */
1365 if (auxent->u.auxent.x_sym.x_tagndx.l > 0)
1367 auxent->u.auxent.x_sym.x_tagndx.p =
1368 table_base + auxent->u.auxent.x_sym.x_tagndx.l;
1369 auxent->fix_tag = 1;
1373 /* Allocate space for the ".debug" section, and read it.
1374 We did not read the debug section until now, because
1375 we didn't want to go to the trouble until someone needed it. */
1377 static char *
1378 build_debug_section (bfd *abfd)
1380 char *debug_section;
1381 file_ptr position;
1382 bfd_size_type sec_size;
1384 asection *sect = bfd_get_section_by_name (abfd, ".debug");
1386 if (!sect)
1388 bfd_set_error (bfd_error_no_debug_section);
1389 return NULL;
1392 sec_size = sect->size;
1393 debug_section = bfd_alloc (abfd, sec_size);
1394 if (debug_section == NULL)
1395 return NULL;
1397 /* Seek to the beginning of the `.debug' section and read it.
1398 Save the current position first; it is needed by our caller.
1399 Then read debug section and reset the file pointer. */
1401 position = bfd_tell (abfd);
1402 if (bfd_seek (abfd, sect->filepos, SEEK_SET) != 0
1403 || bfd_bread (debug_section, sec_size, abfd) != sec_size
1404 || bfd_seek (abfd, position, SEEK_SET) != 0)
1405 return NULL;
1406 return debug_section;
1409 /* Return a pointer to a malloc'd copy of 'name'. 'name' may not be
1410 \0-terminated, but will not exceed 'maxlen' characters. The copy *will*
1411 be \0-terminated. */
1413 static char *
1414 copy_name (bfd *abfd, char *name, size_t maxlen)
1416 size_t len;
1417 char *newname;
1419 for (len = 0; len < maxlen; ++len)
1420 if (name[len] == '\0')
1421 break;
1423 if ((newname = bfd_alloc (abfd, (bfd_size_type) len + 1)) == NULL)
1424 return NULL;
1426 strncpy (newname, name, len);
1427 newname[len] = '\0';
1428 return newname;
1431 /* Read in the external symbols. */
1433 bfd_boolean
1434 _bfd_coff_get_external_symbols (bfd *abfd)
1436 bfd_size_type symesz;
1437 bfd_size_type size;
1438 void * syms;
1440 if (obj_coff_external_syms (abfd) != NULL)
1441 return TRUE;
1443 symesz = bfd_coff_symesz (abfd);
1445 size = obj_raw_syment_count (abfd) * symesz;
1447 syms = bfd_malloc (size);
1448 if (syms == NULL && size != 0)
1449 return FALSE;
1451 if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0
1452 || bfd_bread (syms, size, abfd) != size)
1454 if (syms != NULL)
1455 free (syms);
1456 return FALSE;
1459 obj_coff_external_syms (abfd) = syms;
1461 return TRUE;
1464 /* Read in the external strings. The strings are not loaded until
1465 they are needed. This is because we have no simple way of
1466 detecting a missing string table in an archive. */
1468 const char *
1469 _bfd_coff_read_string_table (bfd *abfd)
1471 char extstrsize[STRING_SIZE_SIZE];
1472 bfd_size_type strsize;
1473 char *strings;
1474 file_ptr pos;
1476 if (obj_coff_strings (abfd) != NULL)
1477 return obj_coff_strings (abfd);
1479 if (obj_sym_filepos (abfd) == 0)
1481 bfd_set_error (bfd_error_no_symbols);
1482 return NULL;
1485 pos = obj_sym_filepos (abfd);
1486 pos += obj_raw_syment_count (abfd) * bfd_coff_symesz (abfd);
1487 if (bfd_seek (abfd, pos, SEEK_SET) != 0)
1488 return NULL;
1490 if (bfd_bread (extstrsize, (bfd_size_type) sizeof extstrsize, abfd)
1491 != sizeof extstrsize)
1493 if (bfd_get_error () != bfd_error_file_truncated)
1494 return NULL;
1496 /* There is no string table. */
1497 strsize = STRING_SIZE_SIZE;
1499 else
1501 #if STRING_SIZE_SIZE == 4
1502 strsize = H_GET_32 (abfd, extstrsize);
1503 #else
1504 #error Change H_GET_32
1505 #endif
1508 if (strsize < STRING_SIZE_SIZE)
1510 (*_bfd_error_handler)
1511 (_("%B: bad string table size %lu"), abfd, (unsigned long) strsize);
1512 bfd_set_error (bfd_error_bad_value);
1513 return NULL;
1516 strings = bfd_malloc (strsize);
1517 if (strings == NULL)
1518 return NULL;
1520 if (bfd_bread (strings + STRING_SIZE_SIZE, strsize - STRING_SIZE_SIZE, abfd)
1521 != strsize - STRING_SIZE_SIZE)
1523 free (strings);
1524 return NULL;
1527 obj_coff_strings (abfd) = strings;
1529 return strings;
1532 /* Free up the external symbols and strings read from a COFF file. */
1534 bfd_boolean
1535 _bfd_coff_free_symbols (bfd *abfd)
1537 if (obj_coff_external_syms (abfd) != NULL
1538 && ! obj_coff_keep_syms (abfd))
1540 free (obj_coff_external_syms (abfd));
1541 obj_coff_external_syms (abfd) = NULL;
1543 if (obj_coff_strings (abfd) != NULL
1544 && ! obj_coff_keep_strings (abfd))
1546 free (obj_coff_strings (abfd));
1547 obj_coff_strings (abfd) = NULL;
1549 return TRUE;
1552 /* Read a symbol table into freshly bfd_allocated memory, swap it, and
1553 knit the symbol names into a normalized form. By normalized here I
1554 mean that all symbols have an n_offset pointer that points to a null-
1555 terminated string. */
1557 combined_entry_type *
1558 coff_get_normalized_symtab (bfd *abfd)
1560 combined_entry_type *internal;
1561 combined_entry_type *internal_ptr;
1562 combined_entry_type *symbol_ptr;
1563 combined_entry_type *internal_end;
1564 size_t symesz;
1565 char *raw_src;
1566 char *raw_end;
1567 const char *string_table = NULL;
1568 char *debug_section = NULL;
1569 bfd_size_type size;
1571 if (obj_raw_syments (abfd) != NULL)
1572 return obj_raw_syments (abfd);
1574 size = obj_raw_syment_count (abfd) * sizeof (combined_entry_type);
1575 internal = bfd_zalloc (abfd, size);
1576 if (internal == NULL && size != 0)
1577 return NULL;
1578 internal_end = internal + obj_raw_syment_count (abfd);
1580 if (! _bfd_coff_get_external_symbols (abfd))
1581 return NULL;
1583 raw_src = (char *) obj_coff_external_syms (abfd);
1585 /* Mark the end of the symbols. */
1586 symesz = bfd_coff_symesz (abfd);
1587 raw_end = (char *) raw_src + obj_raw_syment_count (abfd) * symesz;
1589 /* FIXME SOMEDAY. A string table size of zero is very weird, but
1590 probably possible. If one shows up, it will probably kill us. */
1592 /* Swap all the raw entries. */
1593 for (internal_ptr = internal;
1594 raw_src < raw_end;
1595 raw_src += symesz, internal_ptr++)
1598 unsigned int i;
1599 bfd_coff_swap_sym_in (abfd, (void *) raw_src,
1600 (void *) & internal_ptr->u.syment);
1601 symbol_ptr = internal_ptr;
1603 for (i = 0;
1604 i < symbol_ptr->u.syment.n_numaux;
1605 i++)
1607 internal_ptr++;
1608 raw_src += symesz;
1609 bfd_coff_swap_aux_in (abfd, (void *) raw_src,
1610 symbol_ptr->u.syment.n_type,
1611 symbol_ptr->u.syment.n_sclass,
1612 (int) i, symbol_ptr->u.syment.n_numaux,
1613 &(internal_ptr->u.auxent));
1614 coff_pointerize_aux (abfd, internal, symbol_ptr, i,
1615 internal_ptr);
1619 /* Free the raw symbols, but not the strings (if we have them). */
1620 obj_coff_keep_strings (abfd) = TRUE;
1621 if (! _bfd_coff_free_symbols (abfd))
1622 return NULL;
1624 for (internal_ptr = internal; internal_ptr < internal_end;
1625 internal_ptr++)
1627 if (internal_ptr->u.syment.n_sclass == C_FILE
1628 && internal_ptr->u.syment.n_numaux > 0)
1630 /* Make a file symbol point to the name in the auxent, since
1631 the text ".file" is redundant. */
1632 if ((internal_ptr + 1)->u.auxent.x_file.x_n.x_zeroes == 0)
1634 /* The filename is a long one, point into the string table. */
1635 if (string_table == NULL)
1637 string_table = _bfd_coff_read_string_table (abfd);
1638 if (string_table == NULL)
1639 return NULL;
1642 internal_ptr->u.syment._n._n_n._n_offset =
1643 ((long)
1644 (string_table
1645 + (internal_ptr + 1)->u.auxent.x_file.x_n.x_offset));
1647 else
1649 /* Ordinary short filename, put into memory anyway. The
1650 Microsoft PE tools sometimes store a filename in
1651 multiple AUX entries. */
1652 if (internal_ptr->u.syment.n_numaux > 1
1653 && coff_data (abfd)->pe)
1654 internal_ptr->u.syment._n._n_n._n_offset =
1655 ((long)
1656 copy_name (abfd,
1657 (internal_ptr + 1)->u.auxent.x_file.x_fname,
1658 internal_ptr->u.syment.n_numaux * symesz));
1659 else
1660 internal_ptr->u.syment._n._n_n._n_offset =
1661 ((long)
1662 copy_name (abfd,
1663 (internal_ptr + 1)->u.auxent.x_file.x_fname,
1664 (size_t) bfd_coff_filnmlen (abfd)));
1667 else
1669 if (internal_ptr->u.syment._n._n_n._n_zeroes != 0)
1671 /* This is a "short" name. Make it long. */
1672 size_t i;
1673 char *newstring;
1675 /* Find the length of this string without walking into memory
1676 that isn't ours. */
1677 for (i = 0; i < 8; ++i)
1678 if (internal_ptr->u.syment._n._n_name[i] == '\0')
1679 break;
1681 newstring = bfd_zalloc (abfd, (bfd_size_type) (i + 1));
1682 if (newstring == NULL)
1683 return NULL;
1684 strncpy (newstring, internal_ptr->u.syment._n._n_name, i);
1685 internal_ptr->u.syment._n._n_n._n_offset = (long int) newstring;
1686 internal_ptr->u.syment._n._n_n._n_zeroes = 0;
1688 else if (internal_ptr->u.syment._n._n_n._n_offset == 0)
1689 internal_ptr->u.syment._n._n_n._n_offset = (long int) "";
1690 else if (!bfd_coff_symname_in_debug (abfd, &internal_ptr->u.syment))
1692 /* Long name already. Point symbol at the string in the
1693 table. */
1694 if (string_table == NULL)
1696 string_table = _bfd_coff_read_string_table (abfd);
1697 if (string_table == NULL)
1698 return NULL;
1700 internal_ptr->u.syment._n._n_n._n_offset =
1701 ((long int)
1702 (string_table
1703 + internal_ptr->u.syment._n._n_n._n_offset));
1705 else
1707 /* Long name in debug section. Very similar. */
1708 if (debug_section == NULL)
1709 debug_section = build_debug_section (abfd);
1710 internal_ptr->u.syment._n._n_n._n_offset = (long int)
1711 (debug_section + internal_ptr->u.syment._n._n_n._n_offset);
1714 internal_ptr += internal_ptr->u.syment.n_numaux;
1717 obj_raw_syments (abfd) = internal;
1718 BFD_ASSERT (obj_raw_syment_count (abfd)
1719 == (unsigned int) (internal_ptr - internal));
1721 return internal;
1724 long
1725 coff_get_reloc_upper_bound (bfd *abfd, sec_ptr asect)
1727 if (bfd_get_format (abfd) != bfd_object)
1729 bfd_set_error (bfd_error_invalid_operation);
1730 return -1;
1732 return (asect->reloc_count + 1) * sizeof (arelent *);
1735 asymbol *
1736 coff_make_empty_symbol (bfd *abfd)
1738 bfd_size_type amt = sizeof (coff_symbol_type);
1739 coff_symbol_type *new = bfd_zalloc (abfd, amt);
1741 if (new == NULL)
1742 return NULL;
1743 new->symbol.section = 0;
1744 new->native = 0;
1745 new->lineno = NULL;
1746 new->done_lineno = FALSE;
1747 new->symbol.the_bfd = abfd;
1749 return & new->symbol;
1752 /* Make a debugging symbol. */
1754 asymbol *
1755 coff_bfd_make_debug_symbol (bfd *abfd,
1756 void * ptr ATTRIBUTE_UNUSED,
1757 unsigned long sz ATTRIBUTE_UNUSED)
1759 bfd_size_type amt = sizeof (coff_symbol_type);
1760 coff_symbol_type *new = bfd_alloc (abfd, amt);
1762 if (new == NULL)
1763 return NULL;
1764 /* @@ The 10 is a guess at a plausible maximum number of aux entries
1765 (but shouldn't be a constant). */
1766 amt = sizeof (combined_entry_type) * 10;
1767 new->native = bfd_zalloc (abfd, amt);
1768 if (!new->native)
1769 return NULL;
1770 new->symbol.section = bfd_abs_section_ptr;
1771 new->symbol.flags = BSF_DEBUGGING;
1772 new->lineno = NULL;
1773 new->done_lineno = FALSE;
1774 new->symbol.the_bfd = abfd;
1776 return & new->symbol;
1779 void
1780 coff_get_symbol_info (bfd *abfd, asymbol *symbol, symbol_info *ret)
1782 bfd_symbol_info (symbol, ret);
1784 if (coffsymbol (symbol)->native != NULL
1785 && coffsymbol (symbol)->native->fix_value)
1786 ret->value = coffsymbol (symbol)->native->u.syment.n_value -
1787 (unsigned long) obj_raw_syments (abfd);
1790 /* Return the COFF syment for a symbol. */
1792 bfd_boolean
1793 bfd_coff_get_syment (bfd *abfd,
1794 asymbol *symbol,
1795 struct internal_syment *psyment)
1797 coff_symbol_type *csym;
1799 csym = coff_symbol_from (abfd, symbol);
1800 if (csym == NULL || csym->native == NULL)
1802 bfd_set_error (bfd_error_invalid_operation);
1803 return FALSE;
1806 *psyment = csym->native->u.syment;
1808 if (csym->native->fix_value)
1809 psyment->n_value = psyment->n_value -
1810 (unsigned long) obj_raw_syments (abfd);
1812 /* FIXME: We should handle fix_line here. */
1814 return TRUE;
1817 /* Return the COFF auxent for a symbol. */
1819 bfd_boolean
1820 bfd_coff_get_auxent (bfd *abfd,
1821 asymbol *symbol,
1822 int indx,
1823 union internal_auxent *pauxent)
1825 coff_symbol_type *csym;
1826 combined_entry_type *ent;
1828 csym = coff_symbol_from (abfd, symbol);
1830 if (csym == NULL
1831 || csym->native == NULL
1832 || indx >= csym->native->u.syment.n_numaux)
1834 bfd_set_error (bfd_error_invalid_operation);
1835 return FALSE;
1838 ent = csym->native + indx + 1;
1840 *pauxent = ent->u.auxent;
1842 if (ent->fix_tag)
1843 pauxent->x_sym.x_tagndx.l =
1844 ((combined_entry_type *) pauxent->x_sym.x_tagndx.p
1845 - obj_raw_syments (abfd));
1847 if (ent->fix_end)
1848 pauxent->x_sym.x_fcnary.x_fcn.x_endndx.l =
1849 ((combined_entry_type *) pauxent->x_sym.x_fcnary.x_fcn.x_endndx.p
1850 - obj_raw_syments (abfd));
1852 if (ent->fix_scnlen)
1853 pauxent->x_csect.x_scnlen.l =
1854 ((combined_entry_type *) pauxent->x_csect.x_scnlen.p
1855 - obj_raw_syments (abfd));
1857 return TRUE;
1860 /* Print out information about COFF symbol. */
1862 void
1863 coff_print_symbol (bfd *abfd,
1864 void * filep,
1865 asymbol *symbol,
1866 bfd_print_symbol_type how)
1868 FILE * file = (FILE *) filep;
1870 switch (how)
1872 case bfd_print_symbol_name:
1873 fprintf (file, "%s", symbol->name);
1874 break;
1876 case bfd_print_symbol_more:
1877 fprintf (file, "coff %s %s",
1878 coffsymbol (symbol)->native ? "n" : "g",
1879 coffsymbol (symbol)->lineno ? "l" : " ");
1880 break;
1882 case bfd_print_symbol_all:
1883 if (coffsymbol (symbol)->native)
1885 bfd_vma val;
1886 unsigned int aux;
1887 combined_entry_type *combined = coffsymbol (symbol)->native;
1888 combined_entry_type *root = obj_raw_syments (abfd);
1889 struct lineno_cache_entry *l = coffsymbol (symbol)->lineno;
1891 fprintf (file, "[%3ld]", (long) (combined - root));
1893 if (! combined->fix_value)
1894 val = (bfd_vma) combined->u.syment.n_value;
1895 else
1896 val = combined->u.syment.n_value - (unsigned long) root;
1898 fprintf (file, "(sec %2d)(fl 0x%02x)(ty %3x)(scl %3d) (nx %d) 0x",
1899 combined->u.syment.n_scnum,
1900 combined->u.syment.n_flags,
1901 combined->u.syment.n_type,
1902 combined->u.syment.n_sclass,
1903 combined->u.syment.n_numaux);
1904 fprintf_vma (file, val);
1905 fprintf (file, " %s", symbol->name);
1907 for (aux = 0; aux < combined->u.syment.n_numaux; aux++)
1909 combined_entry_type *auxp = combined + aux + 1;
1910 long tagndx;
1912 if (auxp->fix_tag)
1913 tagndx = auxp->u.auxent.x_sym.x_tagndx.p - root;
1914 else
1915 tagndx = auxp->u.auxent.x_sym.x_tagndx.l;
1917 fprintf (file, "\n");
1919 if (bfd_coff_print_aux (abfd, file, root, combined, auxp, aux))
1920 continue;
1922 switch (combined->u.syment.n_sclass)
1924 case C_FILE:
1925 fprintf (file, "File ");
1926 break;
1928 case C_STAT:
1929 if (combined->u.syment.n_type == T_NULL)
1930 /* Probably a section symbol ? */
1932 fprintf (file, "AUX scnlen 0x%lx nreloc %d nlnno %d",
1933 (long) auxp->u.auxent.x_scn.x_scnlen,
1934 auxp->u.auxent.x_scn.x_nreloc,
1935 auxp->u.auxent.x_scn.x_nlinno);
1936 if (auxp->u.auxent.x_scn.x_checksum != 0
1937 || auxp->u.auxent.x_scn.x_associated != 0
1938 || auxp->u.auxent.x_scn.x_comdat != 0)
1939 fprintf (file, " checksum 0x%lx assoc %d comdat %d",
1940 auxp->u.auxent.x_scn.x_checksum,
1941 auxp->u.auxent.x_scn.x_associated,
1942 auxp->u.auxent.x_scn.x_comdat);
1943 break;
1945 /* Otherwise fall through. */
1946 case C_EXT:
1947 if (ISFCN (combined->u.syment.n_type))
1949 long next, llnos;
1951 if (auxp->fix_end)
1952 next = (auxp->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.p
1953 - root);
1954 else
1955 next = auxp->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.l;
1956 llnos = auxp->u.auxent.x_sym.x_fcnary.x_fcn.x_lnnoptr;
1957 fprintf (file,
1958 "AUX tagndx %ld ttlsiz 0x%lx lnnos %ld next %ld",
1959 tagndx, auxp->u.auxent.x_sym.x_misc.x_fsize,
1960 llnos, next);
1961 break;
1963 /* Otherwise fall through. */
1964 default:
1965 fprintf (file, "AUX lnno %d size 0x%x tagndx %ld",
1966 auxp->u.auxent.x_sym.x_misc.x_lnsz.x_lnno,
1967 auxp->u.auxent.x_sym.x_misc.x_lnsz.x_size,
1968 tagndx);
1969 if (auxp->fix_end)
1970 fprintf (file, " endndx %ld",
1971 ((long)
1972 (auxp->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.p
1973 - root)));
1974 break;
1978 if (l)
1980 fprintf (file, "\n%s :", l->u.sym->name);
1981 l++;
1982 while (l->line_number)
1984 fprintf (file, "\n%4d : ", l->line_number);
1985 fprintf_vma (file, l->u.offset + symbol->section->vma);
1986 l++;
1990 else
1992 bfd_print_symbol_vandf (abfd, (void *) file, symbol);
1993 fprintf (file, " %-5s %s %s %s",
1994 symbol->section->name,
1995 coffsymbol (symbol)->native ? "n" : "g",
1996 coffsymbol (symbol)->lineno ? "l" : " ",
1997 symbol->name);
2002 /* Return whether a symbol name implies a local symbol. In COFF,
2003 local symbols generally start with ``.L''. Most targets use this
2004 function for the is_local_label_name entry point, but some may
2005 override it. */
2007 bfd_boolean
2008 _bfd_coff_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
2009 const char *name)
2011 return name[0] == '.' && name[1] == 'L';
2014 /* Provided a BFD, a section and an offset (in bytes, not octets) into the
2015 section, calculate and return the name of the source file and the line
2016 nearest to the wanted location. */
2018 bfd_boolean
2019 coff_find_nearest_line (bfd *abfd,
2020 asection *section,
2021 asymbol **symbols,
2022 bfd_vma offset,
2023 const char **filename_ptr,
2024 const char **functionname_ptr,
2025 unsigned int *line_ptr)
2027 bfd_boolean found;
2028 unsigned int i;
2029 unsigned int line_base;
2030 coff_data_type *cof = coff_data (abfd);
2031 /* Run through the raw syments if available. */
2032 combined_entry_type *p;
2033 combined_entry_type *pend;
2034 alent *l;
2035 struct coff_section_tdata *sec_data;
2036 bfd_size_type amt;
2038 /* Before looking through the symbol table, try to use a .stab
2039 section to find the information. */
2040 if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
2041 &found, filename_ptr,
2042 functionname_ptr, line_ptr,
2043 &coff_data(abfd)->line_info))
2044 return FALSE;
2046 if (found)
2047 return TRUE;
2049 /* Also try examining DWARF2 debugging information. */
2050 if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
2051 filename_ptr, functionname_ptr,
2052 line_ptr, 0,
2053 &coff_data(abfd)->dwarf2_find_line_info))
2054 return TRUE;
2056 *filename_ptr = 0;
2057 *functionname_ptr = 0;
2058 *line_ptr = 0;
2060 /* Don't try and find line numbers in a non coff file. */
2061 if (!bfd_family_coff (abfd))
2062 return FALSE;
2064 if (cof == NULL)
2065 return FALSE;
2067 /* Find the first C_FILE symbol. */
2068 p = cof->raw_syments;
2069 if (!p)
2070 return FALSE;
2072 pend = p + cof->raw_syment_count;
2073 while (p < pend)
2075 if (p->u.syment.n_sclass == C_FILE)
2076 break;
2077 p += 1 + p->u.syment.n_numaux;
2080 if (p < pend)
2082 bfd_vma sec_vma;
2083 bfd_vma maxdiff;
2085 /* Look through the C_FILE symbols to find the best one. */
2086 sec_vma = bfd_get_section_vma (abfd, section);
2087 *filename_ptr = (char *) p->u.syment._n._n_n._n_offset;
2088 maxdiff = (bfd_vma) 0 - (bfd_vma) 1;
2089 while (1)
2091 combined_entry_type *p2;
2093 for (p2 = p + 1 + p->u.syment.n_numaux;
2094 p2 < pend;
2095 p2 += 1 + p2->u.syment.n_numaux)
2097 if (p2->u.syment.n_scnum > 0
2098 && (section
2099 == coff_section_from_bfd_index (abfd,
2100 p2->u.syment.n_scnum)))
2101 break;
2102 if (p2->u.syment.n_sclass == C_FILE)
2104 p2 = pend;
2105 break;
2109 /* We use <= MAXDIFF here so that if we get a zero length
2110 file, we actually use the next file entry. */
2111 if (p2 < pend
2112 && offset + sec_vma >= (bfd_vma) p2->u.syment.n_value
2113 && offset + sec_vma - (bfd_vma) p2->u.syment.n_value <= maxdiff)
2115 *filename_ptr = (char *) p->u.syment._n._n_n._n_offset;
2116 maxdiff = offset + sec_vma - p2->u.syment.n_value;
2119 /* Avoid endless loops on erroneous files by ensuring that
2120 we always move forward in the file. */
2121 if (p >= cof->raw_syments + p->u.syment.n_value)
2122 break;
2124 p = cof->raw_syments + p->u.syment.n_value;
2125 if (p > pend || p->u.syment.n_sclass != C_FILE)
2126 break;
2130 /* Now wander though the raw linenumbers of the section. */
2131 /* If we have been called on this section before, and th. e offset we
2132 want is further down then we can prime the lookup loop. */
2133 sec_data = coff_section_data (abfd, section);
2134 if (sec_data != NULL
2135 && sec_data->i > 0
2136 && offset >= sec_data->offset)
2138 i = sec_data->i;
2139 *functionname_ptr = sec_data->function;
2140 line_base = sec_data->line_base;
2142 else
2144 i = 0;
2145 line_base = 0;
2148 if (section->lineno != NULL)
2150 bfd_vma last_value = 0;
2152 l = &section->lineno[i];
2154 for (; i < section->lineno_count; i++)
2156 if (l->line_number == 0)
2158 /* Get the symbol this line number points at. */
2159 coff_symbol_type *coff = (coff_symbol_type *) (l->u.sym);
2160 if (coff->symbol.value > offset)
2161 break;
2162 *functionname_ptr = coff->symbol.name;
2163 last_value = coff->symbol.value;
2164 if (coff->native)
2166 combined_entry_type *s = coff->native;
2167 s = s + 1 + s->u.syment.n_numaux;
2169 /* In XCOFF a debugging symbol can follow the
2170 function symbol. */
2171 if (s->u.syment.n_scnum == N_DEBUG)
2172 s = s + 1 + s->u.syment.n_numaux;
2174 /* S should now point to the .bf of the function. */
2175 if (s->u.syment.n_numaux)
2177 /* The linenumber is stored in the auxent. */
2178 union internal_auxent *a = &((s + 1)->u.auxent);
2179 line_base = a->x_sym.x_misc.x_lnsz.x_lnno;
2180 *line_ptr = line_base;
2184 else
2186 if (l->u.offset > offset)
2187 break;
2188 *line_ptr = l->line_number + line_base - 1;
2190 l++;
2193 /* If we fell off the end of the loop, then assume that this
2194 symbol has no line number info. Otherwise, symbols with no
2195 line number info get reported with the line number of the
2196 last line of the last symbol which does have line number
2197 info. We use 0x100 as a slop to account for cases where the
2198 last line has executable code. */
2199 if (i >= section->lineno_count
2200 && last_value != 0
2201 && offset - last_value > 0x100)
2203 *functionname_ptr = NULL;
2204 *line_ptr = 0;
2208 /* Cache the results for the next call. */
2209 if (sec_data == NULL && section->owner == abfd)
2211 amt = sizeof (struct coff_section_tdata);
2212 section->used_by_bfd = bfd_zalloc (abfd, amt);
2213 sec_data = (struct coff_section_tdata *) section->used_by_bfd;
2215 if (sec_data != NULL)
2217 sec_data->offset = offset;
2218 sec_data->i = i;
2219 sec_data->function = *functionname_ptr;
2220 sec_data->line_base = line_base;
2223 return TRUE;
2226 bfd_boolean
2227 coff_find_inliner_info (bfd *abfd,
2228 const char **filename_ptr,
2229 const char **functionname_ptr,
2230 unsigned int *line_ptr)
2232 bfd_boolean found;
2234 found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
2235 functionname_ptr, line_ptr,
2236 &coff_data(abfd)->dwarf2_find_line_info);
2237 return (found);
2241 coff_sizeof_headers (bfd *abfd, bfd_boolean reloc)
2243 size_t size;
2245 if (! reloc)
2246 size = bfd_coff_filhsz (abfd) + bfd_coff_aoutsz (abfd);
2247 else
2248 size = bfd_coff_filhsz (abfd);
2250 size += abfd->section_count * bfd_coff_scnhsz (abfd);
2251 return size;
2254 /* Change the class of a coff symbol held by BFD. */
2256 bfd_boolean
2257 bfd_coff_set_symbol_class (bfd * abfd,
2258 asymbol * symbol,
2259 unsigned int class)
2261 coff_symbol_type * csym;
2263 csym = coff_symbol_from (abfd, symbol);
2264 if (csym == NULL)
2266 bfd_set_error (bfd_error_invalid_operation);
2267 return FALSE;
2269 else if (csym->native == NULL)
2271 /* This is an alien symbol which no native coff backend data.
2272 We cheat here by creating a fake native entry for it and
2273 then filling in the class. This code is based on that in
2274 coff_write_alien_symbol(). */
2276 combined_entry_type * native;
2277 bfd_size_type amt = sizeof (* native);
2279 native = bfd_zalloc (abfd, amt);
2280 if (native == NULL)
2281 return FALSE;
2283 native->u.syment.n_type = T_NULL;
2284 native->u.syment.n_sclass = class;
2286 if (bfd_is_und_section (symbol->section))
2288 native->u.syment.n_scnum = N_UNDEF;
2289 native->u.syment.n_value = symbol->value;
2291 else if (bfd_is_com_section (symbol->section))
2293 native->u.syment.n_scnum = N_UNDEF;
2294 native->u.syment.n_value = symbol->value;
2296 else
2298 native->u.syment.n_scnum =
2299 symbol->section->output_section->target_index;
2300 native->u.syment.n_value = (symbol->value
2301 + symbol->section->output_offset);
2302 if (! obj_pe (abfd))
2303 native->u.syment.n_value += symbol->section->output_section->vma;
2305 /* Copy the any flags from the file header into the symbol.
2306 FIXME: Why? */
2307 native->u.syment.n_flags = bfd_asymbol_bfd (& csym->symbol)->flags;
2310 csym->native = native;
2312 else
2313 csym->native->u.syment.n_sclass = class;
2315 return TRUE;
2318 struct coff_comdat_info *
2319 bfd_coff_get_comdat_section (bfd *abfd, struct bfd_section *sec)
2321 if (bfd_get_flavour (abfd) == bfd_target_coff_flavour
2322 && coff_section_data (abfd, sec) != NULL)
2323 return coff_section_data (abfd, sec)->comdat;
2324 else
2325 return NULL;