9 asection *core_text_sect;
15 /* For mapping symbols to specific .o files during file ordering. */
21 struct function_map *symbol_map;
22 unsigned int symbol_map_count;
24 extern void i386_find_call PARAMS ((Sym *, bfd_vma, bfd_vma));
25 extern void alpha_find_call PARAMS ((Sym *, bfd_vma, bfd_vma));
26 extern void vax_find_call PARAMS ((Sym *, bfd_vma, bfd_vma));
27 extern void tahoe_find_call PARAMS ((Sym *, bfd_vma, bfd_vma));
28 extern void sparc_find_call PARAMS ((Sym *, bfd_vma, bfd_vma));
31 DEFUN (read_function_mappings, (filename), const char *filename)
33 FILE *file = fopen (filename, "r");
39 fprintf (stderr, _("%s: could not open %s.\n"), whoami, filename);
43 /* First parse the mapping file so we know how big we need to
44 make our tables. We also do some sanity checks at this
50 matches = fscanf (file, "%[^\n:]", dummy);
53 fprintf (stderr, _("%s: unable to parse mapping file %s.\n"),
58 /* Just skip messages about files with no symbols. */
59 if (!strncmp (dummy, "No symbols in ", 14))
65 /* Don't care what else is on this line at this point. */
66 fscanf (file, "%[^\n]\n", dummy);
70 /* Now we know how big we need to make our table. */
71 symbol_map = ((struct function_map *)
72 xmalloc (count * sizeof (struct function_map)));
74 /* Rewind the input file so we can read it again. */
77 /* Read each entry and put it into the table. */
84 matches = fscanf (file, "%[^\n:]", dummy);
87 fprintf (stderr, _("%s: unable to parse mapping file %s.\n"),
92 /* Just skip messages about files with no symbols. */
93 if (!strncmp (dummy, "No symbols in ", 14))
99 /* dummy has the filename, go ahead and copy it. */
100 symbol_map[count].file_name = xmalloc (strlen (dummy) + 1);
101 strcpy (symbol_map[count].file_name, dummy);
103 /* Now we need the function name. */
104 fscanf (file, "%[^\n]\n", dummy);
105 tmp = strrchr (dummy, ' ') + 1;
106 symbol_map[count].function_name = xmalloc (strlen (tmp) + 1);
107 strcpy (symbol_map[count].function_name, tmp);
111 /* Record the size of the map table for future reference. */
112 symbol_map_count = count;
116 DEFUN (core_init, (a_out_name), const char *a_out_name)
118 core_bfd = bfd_openr (a_out_name, 0);
126 if (!bfd_check_format (core_bfd, bfd_object))
128 fprintf (stderr, _("%s: %s: not in a.out format\n"), whoami, a_out_name);
132 /* get core's text section: */
133 core_text_sect = bfd_get_section_by_name (core_bfd, ".text");
136 core_text_sect = bfd_get_section_by_name (core_bfd, "$CODE$");
139 fprintf (stderr, _("%s: can't find .text section in %s\n"),
145 /* read core's symbol table: */
147 /* this will probably give us more than we need, but that's ok: */
148 core_num_syms = bfd_get_symtab_upper_bound (core_bfd);
149 if (core_num_syms < 0)
151 fprintf (stderr, "%s: %s: %s\n", whoami, a_out_name,
152 bfd_errmsg (bfd_get_error ()));
156 core_syms = (asymbol **) xmalloc (core_num_syms);
157 core_num_syms = bfd_canonicalize_symtab (core_bfd, core_syms);
158 if (core_num_syms < 0)
160 fprintf (stderr, "%s: %s: %s\n", whoami, a_out_name,
161 bfd_errmsg (bfd_get_error ()));
168 switch (bfd_get_arch (core_bfd))
183 if (function_mapping_file)
184 read_function_mappings (function_mapping_file);
189 * Read in the text space of an a.out file
192 DEFUN (core_get_text_space, (core_bfd), bfd * core_bfd)
194 core_text_space = (PTR) malloc (core_text_sect->_raw_size);
196 if (!core_text_space)
198 fprintf (stderr, _("%s: ran out room for %lu bytes of text space\n"),
199 whoami, (unsigned long) core_text_sect->_raw_size);
202 if (!bfd_get_section_contents (core_bfd, core_text_sect, core_text_space,
203 0, core_text_sect->_raw_size))
205 bfd_perror ("bfd_get_section_contents");
206 free (core_text_space);
209 if (!core_text_space)
211 fprintf (stderr, _("%s: can't do -c\n"), whoami);
217 DEFUN (find_call, (parent, p_lowpc, p_highpc),
218 Sym * parent AND bfd_vma p_lowpc AND bfd_vma p_highpc)
220 switch (bfd_get_arch (core_bfd))
223 i386_find_call (parent, p_lowpc, p_highpc);
227 alpha_find_call (parent, p_lowpc, p_highpc);
231 vax_find_call (parent, p_lowpc, p_highpc);
235 sparc_find_call (parent, p_lowpc, p_highpc);
239 tahoe_find_call (parent, p_lowpc, p_highpc);
243 fprintf (stderr, _("%s: -c not supported on architecture %s\n"),
244 whoami, bfd_printable_name(core_bfd));
246 /* Don't give the error more than once. */
247 ignore_direct_calls = FALSE;
252 * Return class of symbol SYM. The returned class can be any of:
253 * 0 -> symbol is not interesting to us
254 * 'T' -> symbol is a global name
255 * 't' -> symbol is a local (static) name
258 DEFUN (core_sym_class, (sym), asymbol * sym)
265 if (sym->section == NULL || (sym->flags & BSF_DEBUGGING) != 0)
271 * Must be a text symbol, and static text symbols don't qualify if
272 * ignore_static_funcs set.
274 if (ignore_static_funcs && (sym->flags & BSF_LOCAL))
276 DBG (AOUTDEBUG, printf ("[core_sym_class] %s: not a function\n",
281 bfd_get_symbol_info (core_bfd, sym, &syminfo);
286 return i; /* it's a global symbol */
291 /* Treat weak symbols as text symbols. FIXME: a weak symbol may
292 also be a data symbol. */
298 /* not a static text symbol */
299 DBG (AOUTDEBUG, printf ("[core_sym_class] %s is of class %c\n",
304 /* do some more filtering on static function-names: */
306 if (ignore_static_funcs)
311 * Can't zero-length name or funny characters in name, where
312 * `funny' includes: `.' (.o file names) and `$' (Pascal labels).
314 if (!sym->name || sym->name[0] == '\0')
319 for (name = sym->name; *name; ++name)
321 if (*name == '.' || *name == '$')
327 * On systems where the C compiler adds an underscore to all
328 * names, static names without underscores seem usually to be
329 * labels in hand written assembler in the library. We don't want
330 * these names. This is certainly necessary on a Sparc running
331 * SunOS 4.1 (try profiling a program that does a lot of
332 * division). I don't know whether it has harmful side effects on
333 * other systems. Perhaps it should be made configurable.
335 sym_prefix = bfd_get_symbol_leading_char (core_bfd);
336 if ((sym_prefix && sym_prefix != sym->name[0])
338 * GCC may add special symbols to help gdb figure out the file
339 * language. We want to ignore these, since sometimes they mask
340 * the real function. (dj@ctron)
342 || !strncmp (sym->name, "__gnu_compiled", 14)
343 || !strncmp (sym->name, "___gnu_compiled", 15))
348 /* If the object file supports marking of function symbols, then we can
349 zap anything that doesn't have BSF_FUNCTION set. */
350 if (ignore_non_functions && (sym->flags & BSF_FUNCTION) == 0)
353 return 't'; /* it's a static text symbol */
358 * Get whatever source info we can get regarding address ADDR:
361 DEFUN (get_src_info, (addr, filename, name, line_num),
362 bfd_vma addr AND const char **filename AND const char **name
365 const char *fname = 0, *func_name = 0;
368 if (bfd_find_nearest_line (core_bfd, core_text_sect, core_syms,
369 addr - core_text_sect->vma,
370 &fname, &func_name, (unsigned int *) &l)
371 && fname && func_name && l)
373 DBG (AOUTDEBUG, printf ("[get_src_info] 0x%lx -> %s:%d (%s)\n",
374 (unsigned long) addr, fname, l, func_name));
382 DBG (AOUTDEBUG, printf ("[get_src_info] no info for 0x%lx (%s:%d,%s)\n",
383 (long) addr, fname ? fname : "<unknown>", l,
384 func_name ? func_name : "<unknown>"));
391 * Read in symbol table from core. One symbol per function is
395 core_create_function_syms (core_bfd)
396 bfd *core_bfd ATTRIBUTE_UNUSED;
398 bfd_vma min_vma = ~0, max_vma = 0;
403 /* pass 1 - determine upper bound on number of function names: */
405 for (i = 0; i < core_num_syms; ++i)
407 if (!core_sym_class (core_syms[i]))
412 /* This should be replaced with a binary search or hashed
415 Don't create a symtab entry for a function that has
416 a mapping to a file, unless it's the first function
419 for (j = 0; j < symbol_map_count; j++)
420 if (!strcmp (core_syms[i]->name, symbol_map[j].function_name))
422 if (j > 0 && ! strcmp (symbol_map [j].file_name,
423 symbol_map [j - 1].file_name))
433 fprintf (stderr, _("%s: file `%s' has no symbols\n"), whoami, a_out_name);
437 /* the "+ 2" is for the sentinels: */
438 symtab.base = (Sym *) xmalloc ((symtab.len + 2) * sizeof (Sym));
440 /* pass 2 - create symbols: */
442 symtab.limit = symtab.base;
443 for (i = 0; i < core_num_syms; ++i)
445 class = core_sym_class (core_syms[i]);
449 printf ("[core_create_function_syms] rejecting: 0x%lx %s\n",
450 (unsigned long) core_syms[i]->value,
451 core_syms[i]->name));
454 /* This should be replaced with a binary search or hashed
459 for (j = 0; j < symbol_map_count; j++)
460 if (!strcmp (core_syms[i]->name, symbol_map[j].function_name))
462 if (j > 0 && ! strcmp (symbol_map [j].file_name,
463 symbol_map [j - 1].file_name))
473 sym_init (symtab.limit);
475 /* symbol offsets are always section-relative: */
477 symtab.limit->addr = core_syms[i]->value + core_syms[i]->section->vma;
479 && !strcmp (core_syms[i]->name, symbol_map[found].function_name))
481 symtab.limit->name = symbol_map[found].file_name;
482 symtab.limit->mapped = 1;
486 symtab.limit->name = core_syms[i]->name;
487 symtab.limit->mapped = 0;
490 /* Lookup filename and line number, if we can */
493 const char *filename, *func_name;
495 if (get_src_info (symtab.limit->addr, &filename, &func_name,
496 &symtab.limit->line_num))
498 symtab.limit->file = source_file_lookup_path (filename);
500 /* FIXME: Checking __osf__ here does not work with a cross
504 * Suppress symbols that are not function names. This is
505 * useful to suppress code-labels and aliases.
507 * This is known to be useful under DEC's OSF/1. Under SunOS 4.x,
508 * labels do not appear in the symbol table info, so this isn't
512 if (strcmp (symtab.limit->name, func_name) != 0)
515 * The symbol's address maps to a different name, so
516 * it can't be a function-entry point. This happens
517 * for labels, for example.
520 printf ("[core_create_function_syms: rej %s (maps to %s)\n",
521 symtab.limit->name, func_name));
528 symtab.limit->is_func = TRUE;
529 symtab.limit->is_bb_head = TRUE;
532 symtab.limit->is_static = TRUE;
535 min_vma = MIN (symtab.limit->addr, min_vma);
536 max_vma = MAX (symtab.limit->addr, max_vma);
539 * If we see "main" without an initial '_', we assume names
540 * are *not* prefixed by '_'.
542 if (symtab.limit->name[0] == 'm' && discard_underscores
543 && strcmp (symtab.limit->name, "main") == 0)
545 discard_underscores = 0;
548 DBG (AOUTDEBUG, printf ("[core_create_function_syms] %ld %s 0x%lx\n",
549 (long) (symtab.limit - symtab.base),
551 (unsigned long) symtab.limit->addr));
555 /* create sentinels: */
557 sym_init (symtab.limit);
558 symtab.limit->name = "<locore>";
559 symtab.limit->addr = 0;
560 symtab.limit->end_addr = min_vma - 1;
563 sym_init (symtab.limit);
564 symtab.limit->name = "<hicore>";
565 symtab.limit->addr = max_vma + 1;
566 symtab.limit->end_addr = ~0;
569 symtab.len = symtab.limit - symtab.base;
570 symtab_finalize (&symtab);
575 * Read in symbol table from core. One symbol per line of source code
579 DEFUN (core_create_line_syms, (core_bfd), bfd * core_bfd)
581 char *prev_name, *prev_filename;
582 int prev_name_len, prev_filename_len;
583 bfd_vma vma, min_vma = ~0, max_vma = 0;
585 Sym *prev, dummy, *sentinel, *sym;
586 const char *filename;
590 * Create symbols for functions as usual. This is necessary in
591 * cases where parts of a program were not compiled with -g. For
592 * those parts we still want to get info at the function level:
594 core_create_function_syms (core_bfd);
596 /* pass 1 - counter number of symbols: */
599 * To find all line information, walk through all possible
600 * text-space addresses (one by one!) and get the debugging
601 * info for each address. When the debugging info changes,
602 * it is time to create a new symbol.
604 * Of course, this is rather slow and it would be better if
605 * bfd would provide an iterator for enumerating all line infos
607 prev_name_len = PATH_MAX;
608 prev_filename_len = PATH_MAX;
609 prev_name = xmalloc (prev_name_len);
610 prev_filename = xmalloc (prev_filename_len);
613 for (offset = 0; offset < core_text_sect->_raw_size; offset += min_insn_size)
617 vma = core_text_sect->vma + offset;
618 if (!get_src_info (vma, &filename, &dummy.name, &dummy.line_num)
619 || (prev_line_num == dummy.line_num
621 && strcmp (prev_name, dummy.name) == 0
622 && strcmp (prev_filename, filename) == 0))
628 prev_line_num = dummy.line_num;
630 len = strlen (dummy.name);
631 if (len >= prev_name_len)
633 prev_name_len = len + 1024;
635 prev_name = xmalloc (prev_name_len);
637 strcpy (prev_name, dummy.name);
639 len = strlen (filename);
640 if (len >= prev_filename_len)
642 prev_filename_len = len + 1024;
643 free (prev_filename);
644 prev_filename = xmalloc (prev_filename_len);
646 strcpy (prev_filename, filename);
648 min_vma = MIN (vma, min_vma);
649 max_vma = MAX (vma, max_vma);
653 free (prev_filename);
655 /* make room for function symbols, too: */
656 ltab.len += symtab.len;
657 ltab.base = (Sym *) xmalloc (ltab.len * sizeof (Sym));
658 ltab.limit = ltab.base;
660 /* pass 2 - create symbols: */
662 /* We now set is_static as we go along, rather than by running
663 through the symbol table at the end.
665 The old way called symtab_finalize before the is_static pass,
666 causing a problem since symtab_finalize uses is_static as part of
667 its address conflict resolution algorithm. Since global symbols
668 were prefered over static symbols, and all line symbols were
669 global at that point, static function names that conflicted with
670 their own line numbers (static, but labeled as global) were
671 rejected in favor of the line num.
673 This was not the desired functionality. We always want to keep
674 our function symbols and discard any conflicting line symbols.
675 Perhaps symtab_finalize should be modified to make this
676 distinction as well, but the current fix works and the code is a
680 for (offset = 0; offset < core_text_sect->_raw_size; offset += min_insn_size)
682 sym_init (ltab.limit);
683 if (!get_src_info (core_text_sect->vma + offset, &filename,
684 <ab.limit->name, <ab.limit->line_num)
685 || (prev && prev->line_num == ltab.limit->line_num
686 && strcmp (prev->name, ltab.limit->name) == 0
687 && strcmp (prev->file->name, filename) == 0))
692 /* make name pointer a malloc'ed string: */
693 ltab.limit->name = xstrdup (ltab.limit->name);
694 ltab.limit->file = source_file_lookup_path (filename);
696 ltab.limit->addr = core_text_sect->vma + offset;
698 /* Set is_static based on the enclosing function, using either:
699 * 1) the previous symbol, if it's from the same function, or
703 if (prev && ltab.limit->file == prev->file &&
704 strcmp (ltab.limit->name, prev->name) == 0)
706 ltab.limit->is_static = prev->is_static;
710 sym = sym_lookup(&symtab, ltab.limit->addr);
711 ltab.limit->is_static = sym->is_static;
717 * If we see "main" without an initial '_', we assume names
718 * are *not* prefixed by '_'.
720 if (ltab.limit->name[0] == 'm' && discard_underscores
721 && strcmp (ltab.limit->name, "main") == 0)
723 discard_underscores = 0;
726 DBG (AOUTDEBUG, printf ("[core_create_line_syms] %lu %s 0x%lx\n",
727 (unsigned long) (ltab.limit - ltab.base),
729 (unsigned long) ltab.limit->addr));
733 /* update sentinels: */
735 sentinel = sym_lookup (&symtab, 0);
736 if (strcmp (sentinel->name, "<locore>") == 0
737 && min_vma <= sentinel->end_addr)
739 sentinel->end_addr = min_vma - 1;
742 sentinel = sym_lookup (&symtab, ~0);
743 if (strcmp (sentinel->name, "<hicore>") == 0 && max_vma >= sentinel->addr)
745 sentinel->addr = max_vma + 1;
748 /* copy in function symbols: */
749 memcpy (ltab.limit, symtab.base, symtab.len * sizeof (Sym));
750 ltab.limit += symtab.len;
752 if ((unsigned int) (ltab.limit - ltab.base) != ltab.len)
755 _("%s: somebody miscounted: ltab.len=%d instead of %ld\n"),
756 whoami, ltab.len, (long) (ltab.limit - ltab.base));
760 /* finalize ltab and make it symbol table: */
762 symtab_finalize (<ab);