9 asection *core_text_sect;
14 DEFUN(core_init, (a_out_name), const char *a_out_name)
16 core_bfd = bfd_openr(a_out_name, 0);
23 if (!bfd_check_format(core_bfd, bfd_object)) {
24 fprintf(stderr, "%s: %s: not in a.out format\n", whoami, a_out_name);
28 /* get core's text section: */
29 core_text_sect = bfd_get_section_by_name(core_bfd, ".text");
30 if (!core_text_sect) {
31 core_text_sect = bfd_get_section_by_name(core_bfd, "$CODE$");
32 if (!core_text_sect) {
33 fprintf(stderr, "%s: can't find .text section in %s\n",
39 /* read core's symbol table: */
41 /* this will probably give us more than we need, but that's ok: */
42 core_num_syms = bfd_get_symtab_upper_bound(core_bfd);
43 if (core_num_syms < 0) {
44 fprintf(stderr, "%s: %s: %s\n", whoami, a_out_name,
45 bfd_errmsg(bfd_get_error()));
49 core_syms = (asymbol**)xmalloc(core_num_syms);
50 core_num_syms = bfd_canonicalize_symtab(core_bfd, core_syms);
51 if (core_num_syms < 0) {
52 fprintf(stderr, "%s: %s: %s\n", whoami, a_out_name,
53 bfd_errmsg(bfd_get_error()));
60 * Read in the text space of an a.out file
63 DEFUN(core_get_text_space, (core_bfd), bfd *core_bfd)
65 core_text_space = (PTR) malloc(core_text_sect->_raw_size);
67 if (!core_text_space) {
68 fprintf(stderr, "%s: ran out room for %ld bytes of text space\n",
69 whoami, core_text_sect->_raw_size);
72 if (!bfd_get_section_contents(core_bfd, core_text_sect, core_text_space,
73 0, core_text_sect->_raw_size))
75 bfd_perror("bfd_get_section_contents");
76 free(core_text_space);
79 if (!core_text_space) {
80 fprintf(stderr, "%s: can't do -c\n", whoami);
82 } /* core_get_text_space */
86 * Return class of symbol SYM. The returned class can be any of:
87 * 0 -> symbol is not interesting to us
88 * 'T' -> symbol is a global name
89 * 't' -> symbol is a local (static) name
92 DEFUN(core_sym_class, (sym), asymbol *sym)
100 * Must be a text symbol, and static text symbols don't qualify if
101 * ignore_static_funcs set.
107 if (ignore_static_funcs && (sym->flags & BSF_LOCAL)) {
108 DBG(AOUTDEBUG, printf("[core_sym_class] %s: not a function\n",
113 bfd_get_symbol_info(core_bfd, sym, &syminfo);
117 return i; /* it's a global symbol */
121 /* not a static text symbol */
122 DBG(AOUTDEBUG, printf("[core_sym_class] %s is of class %c\n",
127 /* do some more filtering on static function-names: */
129 if (ignore_static_funcs) {
133 * Can't zero-length name or funny characters in name, where
134 * `funny' includes: `.' (.o file names) and `$' (Pascal labels).
136 if (!sym->name || sym->name[0] == '\0') {
140 for (name = sym->name; *name; ++name) {
141 if (*name == '.' || *name == '$') {
146 * On systems where the C compiler adds an underscore to all
147 * names, static names without underscores seem usually to be
148 * labels in hand written assembler in the library. We don't want
149 * these names. This is certainly necessary on a Sparc running
150 * SunOS 4.1 (try profiling a program that does a lot of
151 * division). I don't know whether it has harmful side effects on
152 * other systems. Perhaps it should be made configurable.
154 sym_prefix = bfd_get_symbol_leading_char(core_bfd);
155 if (sym_prefix && sym_prefix != sym->name[0]
157 * GCC may add special symbols to help gdb figure out the file
158 * language. We want to ignore these, since sometimes they mask
159 * the real function. (dj@ctron)
161 || !strncmp (sym->name, "__gnu_compiled", 14)
162 || !strncmp (sym->name, "___gnu_compiled", 15))
166 return 't'; /* it's a static text symbol */
167 } /* core_sym_class */
171 * Get whatever source info we can get regarding address ADDR:
174 DEFUN(get_src_info, (addr, filename, name, line_num),
175 bfd_vma addr AND const char **filename AND const char **name
178 const char *fname = 0, *func_name = 0;
181 if (bfd_find_nearest_line(core_bfd, core_text_sect, core_syms,
182 addr - core_text_sect->vma,
183 &fname, &func_name, &l)
184 && fname && func_name && l)
186 DBG(AOUTDEBUG, printf("[get_src_info] 0x%lx -> %s:%d (%s)\n",
187 addr, fname, l, func_name));
193 DBG(AOUTDEBUG, printf("[get_src_info] no info for 0x%lx (%s:%d,%s)\n",
194 (long) addr, fname ? fname : "<unknown>", l,
195 func_name ? func_name : "<unknown>"));
202 * Read in symbol table from core. One symbol per function is
206 DEFUN(core_create_function_syms, (core_bfd), bfd *core_bfd)
208 bfd_vma min_vma = ~0, max_vma = 0;
209 const char *filename, *func_name;
213 /* pass 1 - determine upper bound on number of function names: */
215 for (i = 0; i < core_num_syms; ++i) {
216 if (!core_sym_class(core_syms[i])) {
222 if (symtab.len == 0) {
223 fprintf(stderr, "%s: file `%s' has no symbols\n", whoami, a_out_name);
227 /* the "+ 2" is for the sentinels: */
228 symtab.base = (Sym*)xmalloc((symtab.len + 2) * sizeof(Sym));
230 /* pass 2 - create symbols: */
232 symtab.limit = symtab.base;
233 for (i = 0; i < core_num_syms; ++i) {
234 class = core_sym_class(core_syms[i]);
237 printf("[core_create_function_syms] rejecting: 0x%lx %s\n",
238 core_syms[i]->value, core_syms[i]->name));
242 sym_init(symtab.limit);
244 /* symbol offsets are always section-relative: */
246 symtab.limit->addr = core_syms[i]->value + core_syms[i]->section->vma;
247 symtab.limit->name = core_syms[i]->name;
251 * Suppress symbols that are not function names. This is
252 * useful to suppress code-labels and aliases.
254 * This is known to be useful under DEC's OSF/1. Under SunOS 4.x,
255 * labels do not appear in the symbol table info, so this isn't
258 if (get_src_info(symtab.limit->addr, &filename, &func_name,
259 &symtab.limit->line_num))
261 symtab.limit->file = source_file_lookup_path(filename);
263 if (strcmp(symtab.limit->name, func_name) != 0) {
265 * The symbol's address maps to a different name, so
266 * it can't be a function-entry point. This happens
267 * for labels, for example.
270 printf("[core_create_function_syms: rej %s (maps to %s)\n",
271 symtab.limit->name, func_name));
277 symtab.limit->is_func = TRUE;
278 symtab.limit->is_bb_head = TRUE;
280 symtab.limit->is_static = TRUE;
283 min_vma = MIN(symtab.limit->addr, min_vma);
284 max_vma = MAX(symtab.limit->addr, max_vma);
287 * If we see "main" without an initial '_', we assume names
288 * are *not* prefixed by '_'.
290 if (symtab.limit->name[0] == 'm' && discard_underscores
291 && strcmp(symtab.limit->name, "main") == 0)
293 discard_underscores = 0;
296 DBG(AOUTDEBUG, printf("[core_create_function_syms] %ld %s 0x%lx\n",
297 (long)(symtab.limit - symtab.base),
298 symtab.limit->name, symtab.limit->addr));
302 /* create sentinels: */
304 sym_init(symtab.limit);
305 symtab.limit->name = "<locore>";
306 symtab.limit->addr = 0;
307 symtab.limit->end_addr = min_vma - 1;
310 sym_init(symtab.limit);
311 symtab.limit->name = "<hicore>";
312 symtab.limit->addr = max_vma + 1;
313 symtab.limit->end_addr = ~0;
316 symtab.len = symtab.limit - symtab.base;
317 symtab_finalize(&symtab);
318 } /* core_create_function_syms */
322 * Read in symbol table from core. One symbol per line of source code
326 DEFUN(core_create_line_syms, (core_bfd), bfd *core_bfd)
328 char prev_name[PATH_MAX], prev_filename[PATH_MAX];
329 bfd_vma vma, min_vma = ~0, max_vma = 0;
330 bfd_vma offset, prev_offset, min_dist;
331 Sym *prev, dummy, *sentinel, *sym;
332 const char *filename;
333 int prev_line_num, i;
336 * Create symbols for functions as usual. This is necessary in
337 * cases where parts of a program were not compiled with -g. For
338 * those parts we still want to get info at the function level:
340 core_create_function_syms(core_bfd);
342 /* pass 1 - counter number of symbols: */
345 * To find all line information, walk through all possible
346 * text-space addresses (one by one!) and get the debugging
347 * info for each address. When the debugging info changes,
348 * it is time to create a new symbol.
350 * Of course, this is rather slow and it would be better if
351 * bfd would provide an iterator for enumerating all line
352 * infos, but for now, we try to speed up the second pass
353 * by determining what the minimum code distance between two
358 min_dist = core_text_sect->_raw_size;
359 prev_offset = -min_dist;
360 prev_filename[0] = '\0';
362 for (offset = 0; offset < core_text_sect->_raw_size; ++offset) {
363 vma = core_text_sect->vma + offset;
364 if (!get_src_info(vma, &filename, &dummy.name, &dummy.line_num)
365 || (prev_line_num == dummy.line_num &&
366 strcmp(prev_name, dummy.name) == 0
367 && strcmp(prev_filename, filename) == 0))
373 prev_line_num = dummy.line_num;
374 strcpy(prev_name, dummy.name);
375 strcpy(prev_filename, filename);
377 if (offset - prev_offset < min_dist) {
378 min_dist = offset - prev_offset;
380 prev_offset = offset;
382 min_vma = MIN(vma, min_vma);
383 max_vma = MAX(vma, max_vma);
386 DBG(AOUTDEBUG, printf("[core_create_line_syms] min_dist=%lx\n", min_dist));
388 /* make room for function symbols, too: */
389 ltab.len += symtab.len;
390 ltab.base = (Sym*) xmalloc(ltab.len * sizeof(Sym));
391 ltab.limit = ltab.base;
393 /* pass 2 - create symbols: */
396 for (offset = 0; offset < core_text_sect->_raw_size; offset += min_dist) {
397 sym_init(ltab.limit);
398 if (!get_src_info(core_text_sect->vma + offset, &filename,
399 <ab.limit->name, <ab.limit->line_num)
400 || (prev && prev->line_num == ltab.limit->line_num
401 && strcmp(prev->name, ltab.limit->name) == 0
402 && strcmp(prev->file->name, filename) == 0))
407 /* make name pointer a malloc'ed string: */
408 ltab.limit->name = strdup(ltab.limit->name);
409 ltab.limit->file = source_file_lookup_path(filename);
411 ltab.limit->addr = core_text_sect->vma + offset;
415 * If we see "main" without an initial '_', we assume names
416 * are *not* prefixed by '_'.
418 if (ltab.limit->name[0] == 'm' && discard_underscores
419 && strcmp(ltab.limit->name, "main") == 0)
421 discard_underscores = 0;
424 DBG(AOUTDEBUG, printf("[core_create_line_syms] %d %s 0x%lx\n",
425 ltab.len, ltab.limit->name,
430 /* update sentinels: */
432 sentinel = sym_lookup(&symtab, 0);
433 if (strcmp(sentinel->name, "<locore>") == 0
434 && min_vma <= sentinel->end_addr)
436 sentinel->end_addr = min_vma - 1;
439 sentinel = sym_lookup(&symtab, ~0);
440 if (strcmp(sentinel->name, "<hicore>") == 0 && max_vma >= sentinel->addr) {
441 sentinel->addr = max_vma + 1;
444 /* copy in function symbols: */
445 memcpy(ltab.limit, symtab.base, symtab.len * sizeof(Sym));
446 ltab.limit += symtab.len;
448 if (ltab.limit - ltab.base != ltab.len) {
450 "%s: somebody miscounted: ltab.len=%ld instead of %d\n",
451 whoami, (long) (ltab.limit - ltab.base), ltab.len);
455 /* finalize ltab and make it symbol table: */
457 symtab_finalize(<ab);
461 /* now go through all core symbols and set is_static accordingly: */
463 for (i = 0; i < core_num_syms; ++i) {
464 if (core_sym_class(core_syms[i]) == 't') {
465 sym = sym_lookup(&symtab, core_syms[i]->value
466 + core_syms[i]->section->vma);
468 sym++->is_static = TRUE;
469 } while (sym->file == sym[-1].file &&
470 strcmp(sym->name, sym[-1].name) == 0);
474 } /* core_create_line_syms */
476 /*** end of core.c ***/