7 /* If not defined in MACHINE_H, assume smallest instruction is 1 byte
8 long. THis is safe but may be needlessly slow on machines where
9 all instructions are longer. */
10 #define MIN_INSN_SIZE 1
16 asection *core_text_sect;
19 /* For mapping symbols to specific .o files during file ordering. */
25 struct function_map *symbol_map;
29 DEFUN (read_function_mappings, (filename), const char *filename)
31 FILE *file = fopen (filename, "r");
37 fprintf (stderr, "%s: could not open %s.\n", whoami, filename);
41 /* First parse the mapping file so we know how big we need to
42 make our tables. We also do some sanity checks at this
48 matches = fscanf (file, "%[^\n:]", dummy);
51 fprintf (stderr, "%s: unable to parse mapping file %s.\n",
56 /* Just skip messages about files with no symbols. */
57 if (!strncmp (dummy, "No symbols in ", 14))
63 /* Don't care what else is on this line at this point. */
64 fscanf (file, "%[^\n]\n", dummy);
68 /* Now we know how big we need to make our table. */
69 symbol_map = ((struct function_map *)
70 xmalloc (count * sizeof (struct function_map)));
72 /* Rewind the input file so we can read it again. */
75 /* Read each entry and put it into the table. */
82 matches = fscanf (file, "%[^\n:]", dummy);
85 fprintf (stderr, "%s: unable to parse mapping file %s.\n",
90 /* Just skip messages about files with no symbols. */
91 if (!strncmp (dummy, "No symbols in ", 14))
97 /* dummy has the filename, go ahead and copy it. */
98 symbol_map[count].file_name = xmalloc (strlen (dummy) + 1);
99 strcpy (symbol_map[count].file_name, dummy);
101 /* Now we need the function name. */
102 fscanf (file, "%[^\n]\n", dummy);
103 tmp = strrchr (dummy, ' ') + 1;
104 symbol_map[count].function_name = xmalloc (strlen (tmp) + 1);
105 strcpy (symbol_map[count].function_name, tmp);
109 /* Record the size of the map table for future reference. */
110 symbol_map_count = count;
114 DEFUN (core_init, (a_out_name), const char *a_out_name)
116 core_bfd = bfd_openr (a_out_name, 0);
124 if (!bfd_check_format (core_bfd, bfd_object))
126 fprintf (stderr, "%s: %s: not in a.out format\n", whoami, a_out_name);
130 /* get core's text section: */
131 core_text_sect = bfd_get_section_by_name (core_bfd, ".text");
134 core_text_sect = bfd_get_section_by_name (core_bfd, "$CODE$");
137 fprintf (stderr, "%s: can't find .text section in %s\n",
143 /* read core's symbol table: */
145 /* this will probably give us more than we need, but that's ok: */
146 core_num_syms = bfd_get_symtab_upper_bound (core_bfd);
147 if (core_num_syms < 0)
149 fprintf (stderr, "%s: %s: %s\n", whoami, a_out_name,
150 bfd_errmsg (bfd_get_error ()));
154 core_syms = (asymbol **) xmalloc (core_num_syms);
155 core_num_syms = bfd_canonicalize_symtab (core_bfd, core_syms);
156 if (core_num_syms < 0)
158 fprintf (stderr, "%s: %s: %s\n", whoami, a_out_name,
159 bfd_errmsg (bfd_get_error ()));
163 if (function_mapping_file)
164 read_function_mappings (function_mapping_file);
169 * Read in the text space of an a.out file
172 DEFUN (core_get_text_space, (core_bfd), bfd * core_bfd)
174 core_text_space = (PTR) malloc (core_text_sect->_raw_size);
176 if (!core_text_space)
178 fprintf (stderr, "%s: ran out room for %ld bytes of text space\n",
179 whoami, core_text_sect->_raw_size);
182 if (!bfd_get_section_contents (core_bfd, core_text_sect, core_text_space,
183 0, core_text_sect->_raw_size))
185 bfd_perror ("bfd_get_section_contents");
186 free (core_text_space);
189 if (!core_text_space)
191 fprintf (stderr, "%s: can't do -c\n", whoami);
197 * Return class of symbol SYM. The returned class can be any of:
198 * 0 -> symbol is not interesting to us
199 * 'T' -> symbol is a global name
200 * 't' -> symbol is a local (static) name
203 DEFUN (core_sym_class, (sym), asymbol * sym)
210 if (sym->section == NULL || (sym->flags & BSF_DEBUGGING) != 0)
216 * Must be a text symbol, and static text symbols don't qualify if
217 * ignore_static_funcs set.
219 if (ignore_static_funcs && (sym->flags & BSF_LOCAL))
221 DBG (AOUTDEBUG, printf ("[core_sym_class] %s: not a function\n",
226 bfd_get_symbol_info (core_bfd, sym, &syminfo);
231 return i; /* it's a global symbol */
236 /* Treat weak symbols as text symbols. FIXME: a weak symbol may
237 also be a data symbol. */
243 /* not a static text symbol */
244 DBG (AOUTDEBUG, printf ("[core_sym_class] %s is of class %c\n",
249 /* do some more filtering on static function-names: */
251 if (ignore_static_funcs)
256 * Can't zero-length name or funny characters in name, where
257 * `funny' includes: `.' (.o file names) and `$' (Pascal labels).
259 if (!sym->name || sym->name[0] == '\0')
264 for (name = sym->name; *name; ++name)
266 if (*name == '.' || *name == '$')
272 * On systems where the C compiler adds an underscore to all
273 * names, static names without underscores seem usually to be
274 * labels in hand written assembler in the library. We don't want
275 * these names. This is certainly necessary on a Sparc running
276 * SunOS 4.1 (try profiling a program that does a lot of
277 * division). I don't know whether it has harmful side effects on
278 * other systems. Perhaps it should be made configurable.
280 sym_prefix = bfd_get_symbol_leading_char (core_bfd);
281 if ((sym_prefix && sym_prefix != sym->name[0])
283 * GCC may add special symbols to help gdb figure out the file
284 * language. We want to ignore these, since sometimes they mask
285 * the real function. (dj@ctron)
287 || !strncmp (sym->name, "__gnu_compiled", 14)
288 || !strncmp (sym->name, "___gnu_compiled", 15))
293 /* If the object file supports marking of function symbols, then we can
294 zap anything that doesn't have BSF_FUNCTION set. */
295 if (ignore_non_functions && (sym->flags & BSF_FUNCTION) == 0)
298 return 't'; /* it's a static text symbol */
303 * Get whatever source info we can get regarding address ADDR:
306 DEFUN (get_src_info, (addr, filename, name, line_num),
307 bfd_vma addr AND const char **filename AND const char **name
310 const char *fname = 0, *func_name = 0;
313 if (bfd_find_nearest_line (core_bfd, core_text_sect, core_syms,
314 addr - core_text_sect->vma,
315 &fname, &func_name, (unsigned int *) &l)
316 && fname && func_name && l)
318 DBG (AOUTDEBUG, printf ("[get_src_info] 0x%lx -> %s:%d (%s)\n",
319 addr, fname, l, func_name));
327 DBG (AOUTDEBUG, printf ("[get_src_info] no info for 0x%lx (%s:%d,%s)\n",
328 (long) addr, fname ? fname : "<unknown>", l,
329 func_name ? func_name : "<unknown>"));
336 * Read in symbol table from core. One symbol per function is
340 DEFUN (core_create_function_syms, (core_bfd), bfd * core_bfd)
342 bfd_vma min_vma = ~0, max_vma = 0;
344 long i, j, found, skip;
346 /* pass 1 - determine upper bound on number of function names: */
348 for (i = 0; i < core_num_syms; ++i)
350 if (!core_sym_class (core_syms[i]))
355 /* This should be replaced with a binary search or hashed
358 Don't create a symtab entry for a function that has
359 a mapping to a file, unless it's the first function
362 for (j = 0; j < symbol_map_count; j++)
363 if (!strcmp (core_syms[i]->name, symbol_map[j].function_name))
365 if (j > 0 && ! strcmp (symbol_map [j].file_name,
366 symbol_map [j - 1].file_name))
376 fprintf (stderr, "%s: file `%s' has no symbols\n", whoami, a_out_name);
380 /* the "+ 2" is for the sentinels: */
381 symtab.base = (Sym *) xmalloc ((symtab.len + 2) * sizeof (Sym));
383 /* pass 2 - create symbols: */
385 symtab.limit = symtab.base;
386 for (i = 0; i < core_num_syms; ++i)
388 class = core_sym_class (core_syms[i]);
392 printf ("[core_create_function_syms] rejecting: 0x%lx %s\n",
393 core_syms[i]->value, core_syms[i]->name));
396 /* This should be replaced with a binary search or hashed
401 for (j = 0; j < symbol_map_count; j++)
402 if (!strcmp (core_syms[i]->name, symbol_map[j].function_name))
404 if (j > 0 && ! strcmp (symbol_map [j].file_name,
405 symbol_map [j - 1].file_name))
415 sym_init (symtab.limit);
417 /* symbol offsets are always section-relative: */
419 symtab.limit->addr = core_syms[i]->value + core_syms[i]->section->vma;
421 && !strcmp (core_syms[i]->name, symbol_map[found].function_name))
423 symtab.limit->name = symbol_map[found].file_name;
424 symtab.limit->mapped = 1;
428 symtab.limit->name = core_syms[i]->name;
429 symtab.limit->mapped = 0;
434 * Suppress symbols that are not function names. This is
435 * useful to suppress code-labels and aliases.
437 * This is known to be useful under DEC's OSF/1. Under SunOS 4.x,
438 * labels do not appear in the symbol table info, so this isn't
442 const char *filename, *func_name;
444 if (get_src_info (symtab.limit->addr, &filename, &func_name,
445 &symtab.limit->line_num))
447 symtab.limit->file = source_file_lookup_path (filename);
449 if (strcmp (symtab.limit->name, func_name) != 0)
452 * The symbol's address maps to a different name, so
453 * it can't be a function-entry point. This happens
454 * for labels, for example.
457 printf ("[core_create_function_syms: rej %s (maps to %s)\n",
458 symtab.limit->name, func_name));
465 symtab.limit->is_func = TRUE;
466 symtab.limit->is_bb_head = TRUE;
469 symtab.limit->is_static = TRUE;
472 min_vma = MIN (symtab.limit->addr, min_vma);
473 max_vma = MAX (symtab.limit->addr, max_vma);
476 * If we see "main" without an initial '_', we assume names
477 * are *not* prefixed by '_'.
479 if (symtab.limit->name[0] == 'm' && discard_underscores
480 && strcmp (symtab.limit->name, "main") == 0)
482 discard_underscores = 0;
485 DBG (AOUTDEBUG, printf ("[core_create_function_syms] %ld %s 0x%lx\n",
486 (long) (symtab.limit - symtab.base),
487 symtab.limit->name, symtab.limit->addr));
491 /* create sentinels: */
493 sym_init (symtab.limit);
494 symtab.limit->name = "<locore>";
495 symtab.limit->addr = 0;
496 symtab.limit->end_addr = min_vma - 1;
499 sym_init (symtab.limit);
500 symtab.limit->name = "<hicore>";
501 symtab.limit->addr = max_vma + 1;
502 symtab.limit->end_addr = ~0;
505 symtab.len = symtab.limit - symtab.base;
506 symtab_finalize (&symtab);
511 * Read in symbol table from core. One symbol per line of source code
515 DEFUN (core_create_line_syms, (core_bfd), bfd * core_bfd)
517 char prev_name[PATH_MAX], prev_filename[PATH_MAX];
518 bfd_vma vma, min_vma = ~0, max_vma = 0;
519 bfd_vma offset, prev_offset, min_dist;
520 Sym *prev, dummy, *sentinel, *sym;
521 const char *filename;
522 int prev_line_num, i;
525 * Create symbols for functions as usual. This is necessary in
526 * cases where parts of a program were not compiled with -g. For
527 * those parts we still want to get info at the function level:
529 core_create_function_syms (core_bfd);
531 /* pass 1 - counter number of symbols: */
534 * To find all line information, walk through all possible
535 * text-space addresses (one by one!) and get the debugging
536 * info for each address. When the debugging info changes,
537 * it is time to create a new symbol.
539 * Of course, this is rather slow and it would be better if
540 * bfd would provide an iterator for enumerating all line
541 * infos, but for now, we try to speed up the second pass
542 * by determining what the minimum code distance between two
547 min_dist = core_text_sect->_raw_size;
548 prev_offset = -min_dist;
549 prev_filename[0] = '\0';
551 for (offset = 0; offset < core_text_sect->_raw_size; offset += MIN_INSN_SIZE)
553 vma = core_text_sect->vma + offset;
554 if (!get_src_info (vma, &filename, &dummy.name, &dummy.line_num)
555 || (prev_line_num == dummy.line_num &&
556 strcmp (prev_name, dummy.name) == 0
557 && strcmp (prev_filename, filename) == 0))
563 prev_line_num = dummy.line_num;
564 strcpy (prev_name, dummy.name);
565 strcpy (prev_filename, filename);
567 if (offset - prev_offset < min_dist)
569 min_dist = offset - prev_offset;
571 prev_offset = offset;
573 min_vma = MIN (vma, min_vma);
574 max_vma = MAX (vma, max_vma);
577 DBG (AOUTDEBUG, printf ("[core_create_line_syms] min_dist=%lx\n", min_dist));
579 /* make room for function symbols, too: */
580 ltab.len += symtab.len;
581 ltab.base = (Sym *) xmalloc (ltab.len * sizeof (Sym));
582 ltab.limit = ltab.base;
584 /* pass 2 - create symbols: */
587 for (offset = 0; offset < core_text_sect->_raw_size; offset += min_dist)
589 sym_init (ltab.limit);
590 if (!get_src_info (core_text_sect->vma + offset, &filename,
591 <ab.limit->name, <ab.limit->line_num)
592 || (prev && prev->line_num == ltab.limit->line_num
593 && strcmp (prev->name, ltab.limit->name) == 0
594 && strcmp (prev->file->name, filename) == 0))
599 /* make name pointer a malloc'ed string: */
600 ltab.limit->name = xstrdup (ltab.limit->name);
601 ltab.limit->file = source_file_lookup_path (filename);
603 ltab.limit->addr = core_text_sect->vma + offset;
607 * If we see "main" without an initial '_', we assume names
608 * are *not* prefixed by '_'.
610 if (ltab.limit->name[0] == 'm' && discard_underscores
611 && strcmp (ltab.limit->name, "main") == 0)
613 discard_underscores = 0;
616 DBG (AOUTDEBUG, printf ("[core_create_line_syms] %d %s 0x%lx\n",
617 ltab.len, ltab.limit->name,
622 /* update sentinels: */
624 sentinel = sym_lookup (&symtab, 0);
625 if (strcmp (sentinel->name, "<locore>") == 0
626 && min_vma <= sentinel->end_addr)
628 sentinel->end_addr = min_vma - 1;
631 sentinel = sym_lookup (&symtab, ~0);
632 if (strcmp (sentinel->name, "<hicore>") == 0 && max_vma >= sentinel->addr)
634 sentinel->addr = max_vma + 1;
637 /* copy in function symbols: */
638 memcpy (ltab.limit, symtab.base, symtab.len * sizeof (Sym));
639 ltab.limit += symtab.len;
641 if (ltab.limit - ltab.base != ltab.len)
644 "%s: somebody miscounted: ltab.len=%ld instead of %d\n",
645 whoami, (long) (ltab.limit - ltab.base), ltab.len);
649 /* finalize ltab and make it symbol table: */
651 symtab_finalize (<ab);
655 /* now go through all core symbols and set is_static accordingly: */
657 for (i = 0; i < core_num_syms; ++i)
659 if (core_sym_class (core_syms[i]) == 't')
661 sym = sym_lookup (&symtab, core_syms[i]->value
662 + core_syms[i]->section->vma);
665 sym++->is_static = TRUE;
667 while (sym->file == sym[-1].file &&
668 strcmp (sym->name, sym[-1].name) == 0);