Commit | Line | Data |
---|---|---|
ef368dac NC |
1 | /* corefile.c |
2 | ||
0eee5820 | 3 | Copyright 2000, 2001 Free Software Foundation, Inc. |
ef368dac NC |
4 | |
5 | This file is part of GNU Binutils. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
20 | 02111-1307, USA. */ | |
21 | \f | |
252b5132 RH |
22 | #include "libiberty.h" |
23 | #include "gprof.h" | |
24 | #include "corefile.h" | |
25 | #include "symtab.h" | |
26 | ||
27 | bfd *core_bfd; | |
28 | int core_num_syms; | |
29 | asymbol **core_syms; | |
30 | asection *core_text_sect; | |
31 | PTR core_text_space; | |
32 | ||
33 | int min_insn_size; | |
34 | int offset_to_code; | |
35 | ||
36 | /* For mapping symbols to specific .o files during file ordering. */ | |
ef368dac NC |
37 | struct function_map |
38 | { | |
252b5132 RH |
39 | char *function_name; |
40 | char *file_name; | |
41 | }; | |
42 | ||
43 | struct function_map *symbol_map; | |
44 | unsigned int symbol_map_count; | |
45 | ||
ef368dac | 46 | extern void i386_find_call PARAMS ((Sym *, bfd_vma, bfd_vma)); |
252b5132 | 47 | extern void alpha_find_call PARAMS ((Sym *, bfd_vma, bfd_vma)); |
ef368dac | 48 | extern void vax_find_call PARAMS ((Sym *, bfd_vma, bfd_vma)); |
252b5132 RH |
49 | extern void tahoe_find_call PARAMS ((Sym *, bfd_vma, bfd_vma)); |
50 | extern void sparc_find_call PARAMS ((Sym *, bfd_vma, bfd_vma)); | |
51 | ||
52 | static void | |
53 | DEFUN (read_function_mappings, (filename), const char *filename) | |
54 | { | |
55 | FILE *file = fopen (filename, "r"); | |
56 | char dummy[1024]; | |
57 | int count = 0; | |
58 | ||
59 | if (!file) | |
60 | { | |
61 | fprintf (stderr, _("%s: could not open %s.\n"), whoami, filename); | |
62 | done (1); | |
63 | } | |
64 | ||
65 | /* First parse the mapping file so we know how big we need to | |
66 | make our tables. We also do some sanity checks at this | |
67 | time. */ | |
68 | while (!feof (file)) | |
69 | { | |
70 | int matches; | |
71 | ||
72 | matches = fscanf (file, "%[^\n:]", dummy); | |
73 | if (!matches) | |
74 | { | |
75 | fprintf (stderr, _("%s: unable to parse mapping file %s.\n"), | |
76 | whoami, filename); | |
77 | done (1); | |
78 | } | |
79 | ||
80 | /* Just skip messages about files with no symbols. */ | |
81 | if (!strncmp (dummy, "No symbols in ", 14)) | |
82 | { | |
83 | fscanf (file, "\n"); | |
84 | continue; | |
85 | } | |
86 | ||
87 | /* Don't care what else is on this line at this point. */ | |
88 | fscanf (file, "%[^\n]\n", dummy); | |
89 | count++; | |
90 | } | |
91 | ||
92 | /* Now we know how big we need to make our table. */ | |
93 | symbol_map = ((struct function_map *) | |
94 | xmalloc (count * sizeof (struct function_map))); | |
95 | ||
96 | /* Rewind the input file so we can read it again. */ | |
97 | rewind (file); | |
98 | ||
99 | /* Read each entry and put it into the table. */ | |
100 | count = 0; | |
101 | while (!feof (file)) | |
102 | { | |
103 | int matches; | |
104 | char *tmp; | |
105 | ||
106 | matches = fscanf (file, "%[^\n:]", dummy); | |
107 | if (!matches) | |
108 | { | |
109 | fprintf (stderr, _("%s: unable to parse mapping file %s.\n"), | |
110 | whoami, filename); | |
111 | done (1); | |
112 | } | |
113 | ||
114 | /* Just skip messages about files with no symbols. */ | |
115 | if (!strncmp (dummy, "No symbols in ", 14)) | |
116 | { | |
117 | fscanf (file, "\n"); | |
118 | continue; | |
119 | } | |
120 | ||
121 | /* dummy has the filename, go ahead and copy it. */ | |
122 | symbol_map[count].file_name = xmalloc (strlen (dummy) + 1); | |
123 | strcpy (symbol_map[count].file_name, dummy); | |
124 | ||
125 | /* Now we need the function name. */ | |
126 | fscanf (file, "%[^\n]\n", dummy); | |
127 | tmp = strrchr (dummy, ' ') + 1; | |
128 | symbol_map[count].function_name = xmalloc (strlen (tmp) + 1); | |
129 | strcpy (symbol_map[count].function_name, tmp); | |
130 | count++; | |
131 | } | |
132 | ||
133 | /* Record the size of the map table for future reference. */ | |
134 | symbol_map_count = count; | |
135 | } | |
136 | ||
ef368dac | 137 | |
252b5132 RH |
138 | void |
139 | DEFUN (core_init, (a_out_name), const char *a_out_name) | |
140 | { | |
141 | core_bfd = bfd_openr (a_out_name, 0); | |
142 | ||
143 | if (!core_bfd) | |
144 | { | |
145 | perror (a_out_name); | |
146 | done (1); | |
147 | } | |
148 | ||
149 | if (!bfd_check_format (core_bfd, bfd_object)) | |
150 | { | |
151 | fprintf (stderr, _("%s: %s: not in a.out format\n"), whoami, a_out_name); | |
152 | done (1); | |
153 | } | |
154 | ||
ef368dac | 155 | /* Get core's text section. */ |
252b5132 RH |
156 | core_text_sect = bfd_get_section_by_name (core_bfd, ".text"); |
157 | if (!core_text_sect) | |
158 | { | |
159 | core_text_sect = bfd_get_section_by_name (core_bfd, "$CODE$"); | |
160 | if (!core_text_sect) | |
161 | { | |
162 | fprintf (stderr, _("%s: can't find .text section in %s\n"), | |
163 | whoami, a_out_name); | |
164 | done (1); | |
165 | } | |
166 | } | |
167 | ||
ef368dac | 168 | /* Read core's symbol table. */ |
252b5132 | 169 | |
ef368dac | 170 | /* This will probably give us more than we need, but that's ok. */ |
252b5132 RH |
171 | core_num_syms = bfd_get_symtab_upper_bound (core_bfd); |
172 | if (core_num_syms < 0) | |
173 | { | |
174 | fprintf (stderr, "%s: %s: %s\n", whoami, a_out_name, | |
175 | bfd_errmsg (bfd_get_error ())); | |
176 | done (1); | |
177 | } | |
178 | ||
179 | core_syms = (asymbol **) xmalloc (core_num_syms); | |
180 | core_num_syms = bfd_canonicalize_symtab (core_bfd, core_syms); | |
0eee5820 | 181 | |
252b5132 RH |
182 | if (core_num_syms < 0) |
183 | { | |
184 | fprintf (stderr, "%s: %s: %s\n", whoami, a_out_name, | |
185 | bfd_errmsg (bfd_get_error ())); | |
186 | done (1); | |
187 | } | |
188 | ||
189 | min_insn_size = 1; | |
190 | offset_to_code = 0; | |
191 | ||
192 | switch (bfd_get_arch (core_bfd)) | |
193 | { | |
194 | case bfd_arch_vax: | |
195 | case bfd_arch_tahoe: | |
196 | offset_to_code = 2; | |
197 | break; | |
198 | ||
199 | case bfd_arch_alpha: | |
200 | min_insn_size = 4; | |
201 | break; | |
202 | ||
203 | default: | |
204 | break; | |
205 | } | |
206 | ||
207 | if (function_mapping_file) | |
208 | read_function_mappings (function_mapping_file); | |
209 | } | |
210 | ||
ef368dac | 211 | /* Read in the text space of an a.out file. */ |
252b5132 | 212 | |
252b5132 RH |
213 | void |
214 | DEFUN (core_get_text_space, (core_bfd), bfd * core_bfd) | |
215 | { | |
216 | core_text_space = (PTR) malloc (core_text_sect->_raw_size); | |
217 | ||
218 | if (!core_text_space) | |
219 | { | |
fdcf7d43 ILT |
220 | fprintf (stderr, _("%s: ran out room for %lu bytes of text space\n"), |
221 | whoami, (unsigned long) core_text_sect->_raw_size); | |
252b5132 RH |
222 | done (1); |
223 | } | |
0eee5820 | 224 | |
252b5132 RH |
225 | if (!bfd_get_section_contents (core_bfd, core_text_sect, core_text_space, |
226 | 0, core_text_sect->_raw_size)) | |
227 | { | |
228 | bfd_perror ("bfd_get_section_contents"); | |
229 | free (core_text_space); | |
230 | core_text_space = 0; | |
231 | } | |
0eee5820 | 232 | |
252b5132 | 233 | if (!core_text_space) |
ef368dac | 234 | fprintf (stderr, _("%s: can't do -c\n"), whoami); |
252b5132 RH |
235 | } |
236 | ||
237 | ||
238 | void | |
239 | DEFUN (find_call, (parent, p_lowpc, p_highpc), | |
240 | Sym * parent AND bfd_vma p_lowpc AND bfd_vma p_highpc) | |
241 | { | |
242 | switch (bfd_get_arch (core_bfd)) | |
243 | { | |
244 | case bfd_arch_i386: | |
245 | i386_find_call (parent, p_lowpc, p_highpc); | |
246 | break; | |
247 | ||
248 | case bfd_arch_alpha: | |
249 | alpha_find_call (parent, p_lowpc, p_highpc); | |
250 | break; | |
251 | ||
252 | case bfd_arch_vax: | |
253 | vax_find_call (parent, p_lowpc, p_highpc); | |
254 | break; | |
255 | ||
256 | case bfd_arch_sparc: | |
257 | sparc_find_call (parent, p_lowpc, p_highpc); | |
258 | break; | |
259 | ||
260 | case bfd_arch_tahoe: | |
261 | tahoe_find_call (parent, p_lowpc, p_highpc); | |
262 | break; | |
263 | ||
264 | default: | |
265 | fprintf (stderr, _("%s: -c not supported on architecture %s\n"), | |
266 | whoami, bfd_printable_name(core_bfd)); | |
267 | ||
268 | /* Don't give the error more than once. */ | |
269 | ignore_direct_calls = FALSE; | |
270 | } | |
271 | } | |
272 | ||
ef368dac | 273 | /* Return class of symbol SYM. The returned class can be any of: |
0eee5820 AM |
274 | 0 -> symbol is not interesting to us |
275 | 'T' -> symbol is a global name | |
276 | 't' -> symbol is a local (static) name. */ | |
ef368dac | 277 | |
252b5132 RH |
278 | static int |
279 | DEFUN (core_sym_class, (sym), asymbol * sym) | |
280 | { | |
281 | symbol_info syminfo; | |
282 | const char *name; | |
283 | char sym_prefix; | |
284 | int i; | |
285 | ||
286 | if (sym->section == NULL || (sym->flags & BSF_DEBUGGING) != 0) | |
ef368dac | 287 | return 0; |
252b5132 | 288 | |
ef368dac NC |
289 | /* Must be a text symbol, and static text symbols |
290 | don't qualify if ignore_static_funcs set. */ | |
252b5132 RH |
291 | if (ignore_static_funcs && (sym->flags & BSF_LOCAL)) |
292 | { | |
293 | DBG (AOUTDEBUG, printf ("[core_sym_class] %s: not a function\n", | |
294 | sym->name)); | |
295 | return 0; | |
296 | } | |
297 | ||
298 | bfd_get_symbol_info (core_bfd, sym, &syminfo); | |
299 | i = syminfo.type; | |
300 | ||
301 | if (i == 'T') | |
ef368dac | 302 | return i; /* It's a global symbol. */ |
252b5132 RH |
303 | |
304 | if (i == 'W') | |
ef368dac NC |
305 | /* Treat weak symbols as text symbols. FIXME: a weak symbol may |
306 | also be a data symbol. */ | |
307 | return 'T'; | |
252b5132 RH |
308 | |
309 | if (i != 't') | |
310 | { | |
ef368dac | 311 | /* Not a static text symbol. */ |
252b5132 RH |
312 | DBG (AOUTDEBUG, printf ("[core_sym_class] %s is of class %c\n", |
313 | sym->name, i)); | |
314 | return 0; | |
315 | } | |
316 | ||
ef368dac | 317 | /* Do some more filtering on static function-names. */ |
252b5132 | 318 | if (ignore_static_funcs) |
ef368dac NC |
319 | return 0; |
320 | ||
321 | /* Can't zero-length name or funny characters in name, where | |
322 | `funny' includes: `.' (.o file names) and `$' (Pascal labels). */ | |
252b5132 | 323 | if (!sym->name || sym->name[0] == '\0') |
ef368dac | 324 | return 0; |
252b5132 RH |
325 | |
326 | for (name = sym->name; *name; ++name) | |
327 | { | |
328 | if (*name == '.' || *name == '$') | |
ef368dac NC |
329 | return 0; |
330 | } | |
0eee5820 | 331 | |
ef368dac NC |
332 | /* On systems where the C compiler adds an underscore to all |
333 | names, static names without underscores seem usually to be | |
334 | labels in hand written assembler in the library. We don't want | |
335 | these names. This is certainly necessary on a Sparc running | |
336 | SunOS 4.1 (try profiling a program that does a lot of | |
337 | division). I don't know whether it has harmful side effects on | |
338 | other systems. Perhaps it should be made configurable. */ | |
252b5132 | 339 | sym_prefix = bfd_get_symbol_leading_char (core_bfd); |
0eee5820 | 340 | |
252b5132 | 341 | if ((sym_prefix && sym_prefix != sym->name[0]) |
ef368dac | 342 | /* GCC may add special symbols to help gdb figure out the file |
0eee5820 | 343 | language. We want to ignore these, since sometimes they mask |
ef368dac | 344 | the real function. (dj@ctron) */ |
252b5132 RH |
345 | || !strncmp (sym->name, "__gnu_compiled", 14) |
346 | || !strncmp (sym->name, "___gnu_compiled", 15)) | |
347 | { | |
348 | return 0; | |
349 | } | |
350 | ||
ef368dac NC |
351 | /* If the object file supports marking of function symbols, then |
352 | we can zap anything that doesn't have BSF_FUNCTION set. */ | |
252b5132 RH |
353 | if (ignore_non_functions && (sym->flags & BSF_FUNCTION) == 0) |
354 | return 0; | |
355 | ||
ef368dac | 356 | return 't'; /* It's a static text symbol. */ |
252b5132 RH |
357 | } |
358 | ||
ef368dac | 359 | /* Get whatever source info we can get regarding address ADDR. */ |
252b5132 | 360 | |
252b5132 RH |
361 | static bool |
362 | DEFUN (get_src_info, (addr, filename, name, line_num), | |
363 | bfd_vma addr AND const char **filename AND const char **name | |
364 | AND int *line_num) | |
365 | { | |
366 | const char *fname = 0, *func_name = 0; | |
367 | int l = 0; | |
368 | ||
369 | if (bfd_find_nearest_line (core_bfd, core_text_sect, core_syms, | |
370 | addr - core_text_sect->vma, | |
371 | &fname, &func_name, (unsigned int *) &l) | |
372 | && fname && func_name && l) | |
373 | { | |
374 | DBG (AOUTDEBUG, printf ("[get_src_info] 0x%lx -> %s:%d (%s)\n", | |
fdcf7d43 | 375 | (unsigned long) addr, fname, l, func_name)); |
252b5132 RH |
376 | *filename = fname; |
377 | *name = func_name; | |
378 | *line_num = l; | |
379 | return TRUE; | |
380 | } | |
381 | else | |
382 | { | |
383 | DBG (AOUTDEBUG, printf ("[get_src_info] no info for 0x%lx (%s:%d,%s)\n", | |
384 | (long) addr, fname ? fname : "<unknown>", l, | |
385 | func_name ? func_name : "<unknown>")); | |
386 | return FALSE; | |
387 | } | |
388 | } | |
389 | ||
ef368dac NC |
390 | /* Read in symbol table from core. |
391 | One symbol per function is entered. */ | |
252b5132 | 392 | |
252b5132 | 393 | void |
8622e41b ILT |
394 | core_create_function_syms (core_bfd) |
395 | bfd *core_bfd ATTRIBUTE_UNUSED; | |
252b5132 RH |
396 | { |
397 | bfd_vma min_vma = ~0, max_vma = 0; | |
398 | int class; | |
399 | long i, found, skip; | |
400 | unsigned int j; | |
401 | ||
ef368dac | 402 | /* Pass 1 - determine upper bound on number of function names. */ |
252b5132 | 403 | symtab.len = 0; |
0eee5820 | 404 | |
252b5132 RH |
405 | for (i = 0; i < core_num_syms; ++i) |
406 | { | |
407 | if (!core_sym_class (core_syms[i])) | |
ef368dac | 408 | continue; |
252b5132 RH |
409 | |
410 | /* This should be replaced with a binary search or hashed | |
0eee5820 | 411 | search. Gross. |
252b5132 RH |
412 | |
413 | Don't create a symtab entry for a function that has | |
414 | a mapping to a file, unless it's the first function | |
415 | in the file. */ | |
416 | skip = 0; | |
417 | for (j = 0; j < symbol_map_count; j++) | |
418 | if (!strcmp (core_syms[i]->name, symbol_map[j].function_name)) | |
419 | { | |
420 | if (j > 0 && ! strcmp (symbol_map [j].file_name, | |
0eee5820 | 421 | symbol_map [j - 1].file_name)) |
252b5132 RH |
422 | skip = 1; |
423 | break; | |
424 | } | |
0eee5820 | 425 | |
252b5132 | 426 | if (!skip) |
0eee5820 | 427 | ++symtab.len; |
252b5132 RH |
428 | } |
429 | ||
430 | if (symtab.len == 0) | |
431 | { | |
432 | fprintf (stderr, _("%s: file `%s' has no symbols\n"), whoami, a_out_name); | |
433 | done (1); | |
434 | } | |
435 | ||
ef368dac | 436 | /* The "+ 2" is for the sentinels. */ |
252b5132 RH |
437 | symtab.base = (Sym *) xmalloc ((symtab.len + 2) * sizeof (Sym)); |
438 | ||
ef368dac | 439 | /* Pass 2 - create symbols. */ |
252b5132 | 440 | symtab.limit = symtab.base; |
0eee5820 | 441 | |
252b5132 RH |
442 | for (i = 0; i < core_num_syms; ++i) |
443 | { | |
444 | class = core_sym_class (core_syms[i]); | |
0eee5820 | 445 | |
252b5132 RH |
446 | if (!class) |
447 | { | |
448 | DBG (AOUTDEBUG, | |
449 | printf ("[core_create_function_syms] rejecting: 0x%lx %s\n", | |
fdcf7d43 ILT |
450 | (unsigned long) core_syms[i]->value, |
451 | core_syms[i]->name)); | |
252b5132 RH |
452 | continue; |
453 | } | |
0eee5820 | 454 | |
252b5132 RH |
455 | /* This should be replaced with a binary search or hashed |
456 | search. Gross. */ | |
252b5132 RH |
457 | skip = 0; |
458 | found = 0; | |
0eee5820 | 459 | |
252b5132 RH |
460 | for (j = 0; j < symbol_map_count; j++) |
461 | if (!strcmp (core_syms[i]->name, symbol_map[j].function_name)) | |
462 | { | |
463 | if (j > 0 && ! strcmp (symbol_map [j].file_name, | |
0eee5820 | 464 | symbol_map [j - 1].file_name)) |
252b5132 RH |
465 | skip = 1; |
466 | else | |
467 | found = j; | |
468 | break; | |
469 | } | |
470 | ||
471 | if (skip) | |
472 | continue; | |
473 | ||
474 | sym_init (symtab.limit); | |
475 | ||
ef368dac | 476 | /* Symbol offsets are always section-relative. */ |
252b5132 | 477 | symtab.limit->addr = core_syms[i]->value + core_syms[i]->section->vma; |
0eee5820 | 478 | |
252b5132 RH |
479 | if (symbol_map_count |
480 | && !strcmp (core_syms[i]->name, symbol_map[found].function_name)) | |
481 | { | |
482 | symtab.limit->name = symbol_map[found].file_name; | |
483 | symtab.limit->mapped = 1; | |
484 | } | |
485 | else | |
486 | { | |
487 | symtab.limit->name = core_syms[i]->name; | |
488 | symtab.limit->mapped = 0; | |
489 | } | |
490 | ||
ef368dac | 491 | /* Lookup filename and line number, if we can. */ |
252b5132 RH |
492 | { |
493 | const char *filename, *func_name; | |
0eee5820 | 494 | |
252b5132 RH |
495 | if (get_src_info (symtab.limit->addr, &filename, &func_name, |
496 | &symtab.limit->line_num)) | |
497 | { | |
498 | symtab.limit->file = source_file_lookup_path (filename); | |
499 | ||
500 | /* FIXME: Checking __osf__ here does not work with a cross | |
0eee5820 | 501 | gprof. */ |
252b5132 | 502 | #ifdef __osf__ |
ef368dac NC |
503 | /* Suppress symbols that are not function names. This is |
504 | useful to suppress code-labels and aliases. | |
0eee5820 | 505 | |
ef368dac NC |
506 | This is known to be useful under DEC's OSF/1. Under SunOS 4.x, |
507 | labels do not appear in the symbol table info, so this isn't | |
508 | necessary. */ | |
252b5132 RH |
509 | |
510 | if (strcmp (symtab.limit->name, func_name) != 0) | |
511 | { | |
ef368dac NC |
512 | /* The symbol's address maps to a different name, so |
513 | it can't be a function-entry point. This happens | |
514 | for labels, for example. */ | |
252b5132 RH |
515 | DBG (AOUTDEBUG, |
516 | printf ("[core_create_function_syms: rej %s (maps to %s)\n", | |
517 | symtab.limit->name, func_name)); | |
518 | continue; | |
519 | } | |
520 | #endif | |
521 | } | |
522 | } | |
523 | ||
524 | symtab.limit->is_func = TRUE; | |
525 | symtab.limit->is_bb_head = TRUE; | |
0eee5820 | 526 | |
252b5132 | 527 | if (class == 't') |
ef368dac | 528 | symtab.limit->is_static = TRUE; |
252b5132 RH |
529 | |
530 | min_vma = MIN (symtab.limit->addr, min_vma); | |
531 | max_vma = MAX (symtab.limit->addr, max_vma); | |
532 | ||
ef368dac | 533 | /* If we see "main" without an initial '_', we assume names |
0eee5820 | 534 | are *not* prefixed by '_'. */ |
252b5132 RH |
535 | if (symtab.limit->name[0] == 'm' && discard_underscores |
536 | && strcmp (symtab.limit->name, "main") == 0) | |
ef368dac | 537 | discard_underscores = 0; |
252b5132 RH |
538 | |
539 | DBG (AOUTDEBUG, printf ("[core_create_function_syms] %ld %s 0x%lx\n", | |
540 | (long) (symtab.limit - symtab.base), | |
fdcf7d43 ILT |
541 | symtab.limit->name, |
542 | (unsigned long) symtab.limit->addr)); | |
252b5132 RH |
543 | ++symtab.limit; |
544 | } | |
545 | ||
ef368dac | 546 | /* Create sentinels. */ |
252b5132 RH |
547 | sym_init (symtab.limit); |
548 | symtab.limit->name = "<locore>"; | |
549 | symtab.limit->addr = 0; | |
550 | symtab.limit->end_addr = min_vma - 1; | |
551 | ++symtab.limit; | |
552 | ||
553 | sym_init (symtab.limit); | |
554 | symtab.limit->name = "<hicore>"; | |
555 | symtab.limit->addr = max_vma + 1; | |
556 | symtab.limit->end_addr = ~0; | |
557 | ++symtab.limit; | |
558 | ||
559 | symtab.len = symtab.limit - symtab.base; | |
560 | symtab_finalize (&symtab); | |
561 | } | |
562 | ||
ef368dac NC |
563 | /* Read in symbol table from core. |
564 | One symbol per line of source code is entered. */ | |
252b5132 | 565 | |
252b5132 RH |
566 | void |
567 | DEFUN (core_create_line_syms, (core_bfd), bfd * core_bfd) | |
568 | { | |
569 | char *prev_name, *prev_filename; | |
570 | int prev_name_len, prev_filename_len; | |
571 | bfd_vma vma, min_vma = ~0, max_vma = 0; | |
572 | bfd_vma offset; | |
573 | Sym *prev, dummy, *sentinel, *sym; | |
574 | const char *filename; | |
575 | int prev_line_num; | |
576 | Sym_Table ltab; | |
0eee5820 | 577 | |
ef368dac NC |
578 | /* Create symbols for functions as usual. This is necessary in |
579 | cases where parts of a program were not compiled with -g. For | |
580 | those parts we still want to get info at the function level. */ | |
252b5132 RH |
581 | core_create_function_syms (core_bfd); |
582 | ||
ef368dac NC |
583 | /* Pass 1 - counter number of symbols. */ |
584 | ||
585 | /* To find all line information, walk through all possible | |
586 | text-space addresses (one by one!) and get the debugging | |
587 | info for each address. When the debugging info changes, | |
588 | it is time to create a new symbol. | |
0eee5820 | 589 | |
ef368dac NC |
590 | Of course, this is rather slow and it would be better if |
591 | bfd would provide an iterator for enumerating all line infos. */ | |
252b5132 RH |
592 | prev_name_len = PATH_MAX; |
593 | prev_filename_len = PATH_MAX; | |
594 | prev_name = xmalloc (prev_name_len); | |
595 | prev_filename = xmalloc (prev_filename_len); | |
596 | ltab.len = 0; | |
597 | prev_line_num = 0; | |
0eee5820 | 598 | |
252b5132 RH |
599 | for (offset = 0; offset < core_text_sect->_raw_size; offset += min_insn_size) |
600 | { | |
601 | int len; | |
602 | ||
603 | vma = core_text_sect->vma + offset; | |
0eee5820 | 604 | |
252b5132 RH |
605 | if (!get_src_info (vma, &filename, &dummy.name, &dummy.line_num) |
606 | || (prev_line_num == dummy.line_num | |
607 | && prev_name != NULL | |
608 | && strcmp (prev_name, dummy.name) == 0 | |
609 | && strcmp (prev_filename, filename) == 0)) | |
ef368dac | 610 | continue; |
252b5132 RH |
611 | |
612 | ++ltab.len; | |
613 | prev_line_num = dummy.line_num; | |
614 | ||
615 | len = strlen (dummy.name); | |
616 | if (len >= prev_name_len) | |
617 | { | |
618 | prev_name_len = len + 1024; | |
619 | free (prev_name); | |
620 | prev_name = xmalloc (prev_name_len); | |
621 | } | |
0eee5820 | 622 | |
252b5132 | 623 | strcpy (prev_name, dummy.name); |
252b5132 | 624 | len = strlen (filename); |
0eee5820 | 625 | |
252b5132 RH |
626 | if (len >= prev_filename_len) |
627 | { | |
628 | prev_filename_len = len + 1024; | |
629 | free (prev_filename); | |
630 | prev_filename = xmalloc (prev_filename_len); | |
631 | } | |
0eee5820 | 632 | |
252b5132 RH |
633 | strcpy (prev_filename, filename); |
634 | ||
635 | min_vma = MIN (vma, min_vma); | |
636 | max_vma = MAX (vma, max_vma); | |
637 | } | |
638 | ||
639 | free (prev_name); | |
640 | free (prev_filename); | |
641 | ||
ef368dac | 642 | /* Make room for function symbols, too. */ |
252b5132 RH |
643 | ltab.len += symtab.len; |
644 | ltab.base = (Sym *) xmalloc (ltab.len * sizeof (Sym)); | |
645 | ltab.limit = ltab.base; | |
646 | ||
ef368dac | 647 | /* Pass 2 - create symbols. */ |
252b5132 RH |
648 | |
649 | /* We now set is_static as we go along, rather than by running | |
650 | through the symbol table at the end. | |
651 | ||
652 | The old way called symtab_finalize before the is_static pass, | |
653 | causing a problem since symtab_finalize uses is_static as part of | |
654 | its address conflict resolution algorithm. Since global symbols | |
655 | were prefered over static symbols, and all line symbols were | |
656 | global at that point, static function names that conflicted with | |
657 | their own line numbers (static, but labeled as global) were | |
658 | rejected in favor of the line num. | |
659 | ||
660 | This was not the desired functionality. We always want to keep | |
661 | our function symbols and discard any conflicting line symbols. | |
662 | Perhaps symtab_finalize should be modified to make this | |
663 | distinction as well, but the current fix works and the code is a | |
664 | lot cleaner now. */ | |
252b5132 | 665 | prev = 0; |
0eee5820 | 666 | |
252b5132 RH |
667 | for (offset = 0; offset < core_text_sect->_raw_size; offset += min_insn_size) |
668 | { | |
669 | sym_init (ltab.limit); | |
0eee5820 | 670 | |
252b5132 RH |
671 | if (!get_src_info (core_text_sect->vma + offset, &filename, |
672 | <ab.limit->name, <ab.limit->line_num) | |
673 | || (prev && prev->line_num == ltab.limit->line_num | |
674 | && strcmp (prev->name, ltab.limit->name) == 0 | |
675 | && strcmp (prev->file->name, filename) == 0)) | |
ef368dac | 676 | continue; |
252b5132 | 677 | |
ef368dac | 678 | /* Make name pointer a malloc'ed string. */ |
252b5132 RH |
679 | ltab.limit->name = xstrdup (ltab.limit->name); |
680 | ltab.limit->file = source_file_lookup_path (filename); | |
681 | ||
682 | ltab.limit->addr = core_text_sect->vma + offset; | |
683 | ||
684 | /* Set is_static based on the enclosing function, using either: | |
0eee5820 AM |
685 | 1) the previous symbol, if it's from the same function, or |
686 | 2) a symtab lookup. */ | |
252b5132 RH |
687 | if (prev && ltab.limit->file == prev->file && |
688 | strcmp (ltab.limit->name, prev->name) == 0) | |
689 | { | |
690 | ltab.limit->is_static = prev->is_static; | |
691 | } | |
692 | else | |
693 | { | |
694 | sym = sym_lookup(&symtab, ltab.limit->addr); | |
695 | ltab.limit->is_static = sym->is_static; | |
696 | } | |
697 | ||
698 | prev = ltab.limit; | |
699 | ||
ef368dac | 700 | /* If we see "main" without an initial '_', we assume names |
0eee5820 | 701 | are *not* prefixed by '_'. */ |
252b5132 RH |
702 | if (ltab.limit->name[0] == 'm' && discard_underscores |
703 | && strcmp (ltab.limit->name, "main") == 0) | |
ef368dac | 704 | discard_underscores = 0; |
252b5132 | 705 | |
4a607dcc ILT |
706 | DBG (AOUTDEBUG, printf ("[core_create_line_syms] %lu %s 0x%lx\n", |
707 | (unsigned long) (ltab.limit - ltab.base), | |
708 | ltab.limit->name, | |
fdcf7d43 | 709 | (unsigned long) ltab.limit->addr)); |
252b5132 RH |
710 | ++ltab.limit; |
711 | } | |
712 | ||
ef368dac | 713 | /* Update sentinels. */ |
252b5132 | 714 | sentinel = sym_lookup (&symtab, 0); |
0eee5820 | 715 | |
252b5132 RH |
716 | if (strcmp (sentinel->name, "<locore>") == 0 |
717 | && min_vma <= sentinel->end_addr) | |
ef368dac | 718 | sentinel->end_addr = min_vma - 1; |
252b5132 RH |
719 | |
720 | sentinel = sym_lookup (&symtab, ~0); | |
0eee5820 | 721 | |
252b5132 | 722 | if (strcmp (sentinel->name, "<hicore>") == 0 && max_vma >= sentinel->addr) |
ef368dac | 723 | sentinel->addr = max_vma + 1; |
252b5132 | 724 | |
ef368dac | 725 | /* Copy in function symbols. */ |
252b5132 RH |
726 | memcpy (ltab.limit, symtab.base, symtab.len * sizeof (Sym)); |
727 | ltab.limit += symtab.len; | |
728 | ||
729 | if ((unsigned int) (ltab.limit - ltab.base) != ltab.len) | |
730 | { | |
731 | fprintf (stderr, | |
732 | _("%s: somebody miscounted: ltab.len=%d instead of %ld\n"), | |
733 | whoami, ltab.len, (long) (ltab.limit - ltab.base)); | |
734 | done (1); | |
735 | } | |
736 | ||
ef368dac | 737 | /* Finalize ltab and make it symbol table. */ |
252b5132 RH |
738 | symtab_finalize (<ab); |
739 | free (symtab.base); | |
740 | symtab = ltab; | |
252b5132 | 741 | } |