Commit | Line | Data |
---|---|---|
ef368dac NC |
1 | /* corefile.c |
2 | ||
ec0806ec | 3 | Copyright 2000, 2001, 2002 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" | |
6d9c411a AM |
24 | #include "search_list.h" |
25 | #include "source.h" | |
252b5132 | 26 | #include "symtab.h" |
6d9c411a | 27 | #include "corefile.h" |
252b5132 RH |
28 | |
29 | bfd *core_bfd; | |
30 | int core_num_syms; | |
31 | asymbol **core_syms; | |
32 | asection *core_text_sect; | |
33 | PTR core_text_space; | |
34 | ||
35 | int min_insn_size; | |
36 | int offset_to_code; | |
37 | ||
38 | /* For mapping symbols to specific .o files during file ordering. */ | |
ef368dac NC |
39 | struct function_map |
40 | { | |
252b5132 RH |
41 | char *function_name; |
42 | char *file_name; | |
43 | }; | |
44 | ||
45 | struct function_map *symbol_map; | |
46 | unsigned int symbol_map_count; | |
47 | ||
ef368dac | 48 | extern void i386_find_call PARAMS ((Sym *, bfd_vma, bfd_vma)); |
252b5132 | 49 | extern void alpha_find_call PARAMS ((Sym *, bfd_vma, bfd_vma)); |
ef368dac | 50 | extern void vax_find_call PARAMS ((Sym *, bfd_vma, bfd_vma)); |
252b5132 RH |
51 | extern void tahoe_find_call PARAMS ((Sym *, bfd_vma, bfd_vma)); |
52 | extern void sparc_find_call PARAMS ((Sym *, bfd_vma, bfd_vma)); | |
ec0806ec | 53 | extern void mips_find_call PARAMS ((Sym *, bfd_vma, bfd_vma)); |
252b5132 RH |
54 | |
55 | static void | |
56 | DEFUN (read_function_mappings, (filename), const char *filename) | |
57 | { | |
58 | FILE *file = fopen (filename, "r"); | |
59 | char dummy[1024]; | |
60 | int count = 0; | |
61 | ||
62 | if (!file) | |
63 | { | |
64 | fprintf (stderr, _("%s: could not open %s.\n"), whoami, filename); | |
65 | done (1); | |
66 | } | |
67 | ||
68 | /* First parse the mapping file so we know how big we need to | |
69 | make our tables. We also do some sanity checks at this | |
70 | time. */ | |
71 | while (!feof (file)) | |
72 | { | |
73 | int matches; | |
74 | ||
75 | matches = fscanf (file, "%[^\n:]", dummy); | |
76 | if (!matches) | |
77 | { | |
78 | fprintf (stderr, _("%s: unable to parse mapping file %s.\n"), | |
79 | whoami, filename); | |
80 | done (1); | |
81 | } | |
82 | ||
83 | /* Just skip messages about files with no symbols. */ | |
84 | if (!strncmp (dummy, "No symbols in ", 14)) | |
85 | { | |
86 | fscanf (file, "\n"); | |
87 | continue; | |
88 | } | |
89 | ||
90 | /* Don't care what else is on this line at this point. */ | |
91 | fscanf (file, "%[^\n]\n", dummy); | |
92 | count++; | |
93 | } | |
94 | ||
95 | /* Now we know how big we need to make our table. */ | |
96 | symbol_map = ((struct function_map *) | |
97 | xmalloc (count * sizeof (struct function_map))); | |
98 | ||
99 | /* Rewind the input file so we can read it again. */ | |
100 | rewind (file); | |
101 | ||
102 | /* Read each entry and put it into the table. */ | |
103 | count = 0; | |
104 | while (!feof (file)) | |
105 | { | |
106 | int matches; | |
107 | char *tmp; | |
108 | ||
109 | matches = fscanf (file, "%[^\n:]", dummy); | |
110 | if (!matches) | |
111 | { | |
112 | fprintf (stderr, _("%s: unable to parse mapping file %s.\n"), | |
113 | whoami, filename); | |
114 | done (1); | |
115 | } | |
116 | ||
117 | /* Just skip messages about files with no symbols. */ | |
118 | if (!strncmp (dummy, "No symbols in ", 14)) | |
119 | { | |
120 | fscanf (file, "\n"); | |
121 | continue; | |
122 | } | |
123 | ||
124 | /* dummy has the filename, go ahead and copy it. */ | |
125 | symbol_map[count].file_name = xmalloc (strlen (dummy) + 1); | |
126 | strcpy (symbol_map[count].file_name, dummy); | |
127 | ||
128 | /* Now we need the function name. */ | |
129 | fscanf (file, "%[^\n]\n", dummy); | |
130 | tmp = strrchr (dummy, ' ') + 1; | |
131 | symbol_map[count].function_name = xmalloc (strlen (tmp) + 1); | |
132 | strcpy (symbol_map[count].function_name, tmp); | |
133 | count++; | |
134 | } | |
135 | ||
136 | /* Record the size of the map table for future reference. */ | |
137 | symbol_map_count = count; | |
138 | } | |
139 | ||
ef368dac | 140 | |
252b5132 RH |
141 | void |
142 | DEFUN (core_init, (a_out_name), const char *a_out_name) | |
143 | { | |
144 | core_bfd = bfd_openr (a_out_name, 0); | |
145 | ||
146 | if (!core_bfd) | |
147 | { | |
148 | perror (a_out_name); | |
149 | done (1); | |
150 | } | |
151 | ||
152 | if (!bfd_check_format (core_bfd, bfd_object)) | |
153 | { | |
154 | fprintf (stderr, _("%s: %s: not in a.out format\n"), whoami, a_out_name); | |
155 | done (1); | |
156 | } | |
157 | ||
ef368dac | 158 | /* Get core's text section. */ |
252b5132 RH |
159 | core_text_sect = bfd_get_section_by_name (core_bfd, ".text"); |
160 | if (!core_text_sect) | |
161 | { | |
162 | core_text_sect = bfd_get_section_by_name (core_bfd, "$CODE$"); | |
163 | if (!core_text_sect) | |
164 | { | |
165 | fprintf (stderr, _("%s: can't find .text section in %s\n"), | |
166 | whoami, a_out_name); | |
167 | done (1); | |
168 | } | |
169 | } | |
170 | ||
ef368dac | 171 | /* Read core's symbol table. */ |
252b5132 | 172 | |
ef368dac | 173 | /* This will probably give us more than we need, but that's ok. */ |
252b5132 RH |
174 | core_num_syms = bfd_get_symtab_upper_bound (core_bfd); |
175 | if (core_num_syms < 0) | |
176 | { | |
177 | fprintf (stderr, "%s: %s: %s\n", whoami, a_out_name, | |
178 | bfd_errmsg (bfd_get_error ())); | |
179 | done (1); | |
180 | } | |
181 | ||
182 | core_syms = (asymbol **) xmalloc (core_num_syms); | |
183 | core_num_syms = bfd_canonicalize_symtab (core_bfd, core_syms); | |
0eee5820 | 184 | |
252b5132 RH |
185 | if (core_num_syms < 0) |
186 | { | |
187 | fprintf (stderr, "%s: %s: %s\n", whoami, a_out_name, | |
188 | bfd_errmsg (bfd_get_error ())); | |
189 | done (1); | |
190 | } | |
191 | ||
192 | min_insn_size = 1; | |
193 | offset_to_code = 0; | |
194 | ||
195 | switch (bfd_get_arch (core_bfd)) | |
196 | { | |
197 | case bfd_arch_vax: | |
198 | case bfd_arch_tahoe: | |
199 | offset_to_code = 2; | |
200 | break; | |
201 | ||
202 | case bfd_arch_alpha: | |
203 | min_insn_size = 4; | |
204 | break; | |
205 | ||
206 | default: | |
207 | break; | |
208 | } | |
209 | ||
210 | if (function_mapping_file) | |
211 | read_function_mappings (function_mapping_file); | |
212 | } | |
213 | ||
ef368dac | 214 | /* Read in the text space of an a.out file. */ |
252b5132 | 215 | |
252b5132 RH |
216 | void |
217 | DEFUN (core_get_text_space, (core_bfd), bfd * core_bfd) | |
218 | { | |
219 | core_text_space = (PTR) malloc (core_text_sect->_raw_size); | |
220 | ||
221 | if (!core_text_space) | |
222 | { | |
fdcf7d43 ILT |
223 | fprintf (stderr, _("%s: ran out room for %lu bytes of text space\n"), |
224 | whoami, (unsigned long) core_text_sect->_raw_size); | |
252b5132 RH |
225 | done (1); |
226 | } | |
0eee5820 | 227 | |
252b5132 RH |
228 | if (!bfd_get_section_contents (core_bfd, core_text_sect, core_text_space, |
229 | 0, core_text_sect->_raw_size)) | |
230 | { | |
231 | bfd_perror ("bfd_get_section_contents"); | |
232 | free (core_text_space); | |
233 | core_text_space = 0; | |
234 | } | |
0eee5820 | 235 | |
252b5132 | 236 | if (!core_text_space) |
ef368dac | 237 | fprintf (stderr, _("%s: can't do -c\n"), whoami); |
252b5132 RH |
238 | } |
239 | ||
240 | ||
241 | void | |
242 | DEFUN (find_call, (parent, p_lowpc, p_highpc), | |
243 | Sym * parent AND bfd_vma p_lowpc AND bfd_vma p_highpc) | |
244 | { | |
245 | switch (bfd_get_arch (core_bfd)) | |
246 | { | |
247 | case bfd_arch_i386: | |
248 | i386_find_call (parent, p_lowpc, p_highpc); | |
249 | break; | |
250 | ||
251 | case bfd_arch_alpha: | |
252 | alpha_find_call (parent, p_lowpc, p_highpc); | |
253 | break; | |
254 | ||
255 | case bfd_arch_vax: | |
256 | vax_find_call (parent, p_lowpc, p_highpc); | |
257 | break; | |
258 | ||
259 | case bfd_arch_sparc: | |
260 | sparc_find_call (parent, p_lowpc, p_highpc); | |
261 | break; | |
262 | ||
263 | case bfd_arch_tahoe: | |
264 | tahoe_find_call (parent, p_lowpc, p_highpc); | |
265 | break; | |
266 | ||
ec0806ec JT |
267 | case bfd_arch_mips: |
268 | mips_find_call (parent, p_lowpc, p_highpc); | |
269 | break; | |
270 | ||
252b5132 RH |
271 | default: |
272 | fprintf (stderr, _("%s: -c not supported on architecture %s\n"), | |
273 | whoami, bfd_printable_name(core_bfd)); | |
274 | ||
275 | /* Don't give the error more than once. */ | |
276 | ignore_direct_calls = FALSE; | |
277 | } | |
278 | } | |
279 | ||
ef368dac | 280 | /* Return class of symbol SYM. The returned class can be any of: |
0eee5820 AM |
281 | 0 -> symbol is not interesting to us |
282 | 'T' -> symbol is a global name | |
283 | 't' -> symbol is a local (static) name. */ | |
ef368dac | 284 | |
252b5132 RH |
285 | static int |
286 | DEFUN (core_sym_class, (sym), asymbol * sym) | |
287 | { | |
288 | symbol_info syminfo; | |
289 | const char *name; | |
290 | char sym_prefix; | |
291 | int i; | |
292 | ||
293 | if (sym->section == NULL || (sym->flags & BSF_DEBUGGING) != 0) | |
ef368dac | 294 | return 0; |
252b5132 | 295 | |
ef368dac NC |
296 | /* Must be a text symbol, and static text symbols |
297 | don't qualify if ignore_static_funcs set. */ | |
252b5132 RH |
298 | if (ignore_static_funcs && (sym->flags & BSF_LOCAL)) |
299 | { | |
300 | DBG (AOUTDEBUG, printf ("[core_sym_class] %s: not a function\n", | |
301 | sym->name)); | |
302 | return 0; | |
303 | } | |
304 | ||
305 | bfd_get_symbol_info (core_bfd, sym, &syminfo); | |
306 | i = syminfo.type; | |
307 | ||
308 | if (i == 'T') | |
ef368dac | 309 | return i; /* It's a global symbol. */ |
252b5132 RH |
310 | |
311 | if (i == 'W') | |
ef368dac NC |
312 | /* Treat weak symbols as text symbols. FIXME: a weak symbol may |
313 | also be a data symbol. */ | |
314 | return 'T'; | |
252b5132 RH |
315 | |
316 | if (i != 't') | |
317 | { | |
ef368dac | 318 | /* Not a static text symbol. */ |
252b5132 RH |
319 | DBG (AOUTDEBUG, printf ("[core_sym_class] %s is of class %c\n", |
320 | sym->name, i)); | |
321 | return 0; | |
322 | } | |
323 | ||
ef368dac | 324 | /* Do some more filtering on static function-names. */ |
252b5132 | 325 | if (ignore_static_funcs) |
ef368dac NC |
326 | return 0; |
327 | ||
328 | /* Can't zero-length name or funny characters in name, where | |
329 | `funny' includes: `.' (.o file names) and `$' (Pascal labels). */ | |
252b5132 | 330 | if (!sym->name || sym->name[0] == '\0') |
ef368dac | 331 | return 0; |
252b5132 RH |
332 | |
333 | for (name = sym->name; *name; ++name) | |
334 | { | |
335 | if (*name == '.' || *name == '$') | |
ef368dac NC |
336 | return 0; |
337 | } | |
0eee5820 | 338 | |
ef368dac NC |
339 | /* On systems where the C compiler adds an underscore to all |
340 | names, static names without underscores seem usually to be | |
341 | labels in hand written assembler in the library. We don't want | |
342 | these names. This is certainly necessary on a Sparc running | |
343 | SunOS 4.1 (try profiling a program that does a lot of | |
344 | division). I don't know whether it has harmful side effects on | |
345 | other systems. Perhaps it should be made configurable. */ | |
252b5132 | 346 | sym_prefix = bfd_get_symbol_leading_char (core_bfd); |
0eee5820 | 347 | |
252b5132 | 348 | if ((sym_prefix && sym_prefix != sym->name[0]) |
ef368dac | 349 | /* GCC may add special symbols to help gdb figure out the file |
0eee5820 | 350 | language. We want to ignore these, since sometimes they mask |
ef368dac | 351 | the real function. (dj@ctron) */ |
252b5132 RH |
352 | || !strncmp (sym->name, "__gnu_compiled", 14) |
353 | || !strncmp (sym->name, "___gnu_compiled", 15)) | |
354 | { | |
355 | return 0; | |
356 | } | |
357 | ||
ef368dac NC |
358 | /* If the object file supports marking of function symbols, then |
359 | we can zap anything that doesn't have BSF_FUNCTION set. */ | |
252b5132 RH |
360 | if (ignore_non_functions && (sym->flags & BSF_FUNCTION) == 0) |
361 | return 0; | |
362 | ||
ef368dac | 363 | return 't'; /* It's a static text symbol. */ |
252b5132 RH |
364 | } |
365 | ||
ef368dac | 366 | /* Get whatever source info we can get regarding address ADDR. */ |
252b5132 | 367 | |
252b5132 RH |
368 | static bool |
369 | DEFUN (get_src_info, (addr, filename, name, line_num), | |
370 | bfd_vma addr AND const char **filename AND const char **name | |
371 | AND int *line_num) | |
372 | { | |
373 | const char *fname = 0, *func_name = 0; | |
374 | int l = 0; | |
375 | ||
376 | if (bfd_find_nearest_line (core_bfd, core_text_sect, core_syms, | |
377 | addr - core_text_sect->vma, | |
378 | &fname, &func_name, (unsigned int *) &l) | |
379 | && fname && func_name && l) | |
380 | { | |
381 | DBG (AOUTDEBUG, printf ("[get_src_info] 0x%lx -> %s:%d (%s)\n", | |
fdcf7d43 | 382 | (unsigned long) addr, fname, l, func_name)); |
252b5132 RH |
383 | *filename = fname; |
384 | *name = func_name; | |
385 | *line_num = l; | |
386 | return TRUE; | |
387 | } | |
388 | else | |
389 | { | |
390 | DBG (AOUTDEBUG, printf ("[get_src_info] no info for 0x%lx (%s:%d,%s)\n", | |
391 | (long) addr, fname ? fname : "<unknown>", l, | |
392 | func_name ? func_name : "<unknown>")); | |
393 | return FALSE; | |
394 | } | |
395 | } | |
396 | ||
ef368dac NC |
397 | /* Read in symbol table from core. |
398 | One symbol per function is entered. */ | |
252b5132 | 399 | |
252b5132 | 400 | void |
8622e41b ILT |
401 | core_create_function_syms (core_bfd) |
402 | bfd *core_bfd ATTRIBUTE_UNUSED; | |
252b5132 RH |
403 | { |
404 | bfd_vma min_vma = ~0, max_vma = 0; | |
405 | int class; | |
406 | long i, found, skip; | |
407 | unsigned int j; | |
408 | ||
ef368dac | 409 | /* Pass 1 - determine upper bound on number of function names. */ |
252b5132 | 410 | symtab.len = 0; |
0eee5820 | 411 | |
252b5132 RH |
412 | for (i = 0; i < core_num_syms; ++i) |
413 | { | |
414 | if (!core_sym_class (core_syms[i])) | |
ef368dac | 415 | continue; |
252b5132 RH |
416 | |
417 | /* This should be replaced with a binary search or hashed | |
0eee5820 | 418 | search. Gross. |
252b5132 RH |
419 | |
420 | Don't create a symtab entry for a function that has | |
421 | a mapping to a file, unless it's the first function | |
422 | in the file. */ | |
423 | skip = 0; | |
424 | for (j = 0; j < symbol_map_count; j++) | |
425 | if (!strcmp (core_syms[i]->name, symbol_map[j].function_name)) | |
426 | { | |
427 | if (j > 0 && ! strcmp (symbol_map [j].file_name, | |
0eee5820 | 428 | symbol_map [j - 1].file_name)) |
252b5132 RH |
429 | skip = 1; |
430 | break; | |
431 | } | |
0eee5820 | 432 | |
252b5132 | 433 | if (!skip) |
0eee5820 | 434 | ++symtab.len; |
252b5132 RH |
435 | } |
436 | ||
437 | if (symtab.len == 0) | |
438 | { | |
439 | fprintf (stderr, _("%s: file `%s' has no symbols\n"), whoami, a_out_name); | |
440 | done (1); | |
441 | } | |
442 | ||
ef368dac | 443 | /* The "+ 2" is for the sentinels. */ |
252b5132 RH |
444 | symtab.base = (Sym *) xmalloc ((symtab.len + 2) * sizeof (Sym)); |
445 | ||
ef368dac | 446 | /* Pass 2 - create symbols. */ |
252b5132 | 447 | symtab.limit = symtab.base; |
0eee5820 | 448 | |
252b5132 RH |
449 | for (i = 0; i < core_num_syms; ++i) |
450 | { | |
451 | class = core_sym_class (core_syms[i]); | |
0eee5820 | 452 | |
252b5132 RH |
453 | if (!class) |
454 | { | |
455 | DBG (AOUTDEBUG, | |
456 | printf ("[core_create_function_syms] rejecting: 0x%lx %s\n", | |
fdcf7d43 ILT |
457 | (unsigned long) core_syms[i]->value, |
458 | core_syms[i]->name)); | |
252b5132 RH |
459 | continue; |
460 | } | |
0eee5820 | 461 | |
252b5132 RH |
462 | /* This should be replaced with a binary search or hashed |
463 | search. Gross. */ | |
252b5132 RH |
464 | skip = 0; |
465 | found = 0; | |
0eee5820 | 466 | |
252b5132 RH |
467 | for (j = 0; j < symbol_map_count; j++) |
468 | if (!strcmp (core_syms[i]->name, symbol_map[j].function_name)) | |
469 | { | |
470 | if (j > 0 && ! strcmp (symbol_map [j].file_name, | |
0eee5820 | 471 | symbol_map [j - 1].file_name)) |
252b5132 RH |
472 | skip = 1; |
473 | else | |
474 | found = j; | |
475 | break; | |
476 | } | |
477 | ||
478 | if (skip) | |
479 | continue; | |
480 | ||
481 | sym_init (symtab.limit); | |
482 | ||
ef368dac | 483 | /* Symbol offsets are always section-relative. */ |
252b5132 | 484 | symtab.limit->addr = core_syms[i]->value + core_syms[i]->section->vma; |
0eee5820 | 485 | |
252b5132 RH |
486 | if (symbol_map_count |
487 | && !strcmp (core_syms[i]->name, symbol_map[found].function_name)) | |
488 | { | |
489 | symtab.limit->name = symbol_map[found].file_name; | |
490 | symtab.limit->mapped = 1; | |
491 | } | |
492 | else | |
493 | { | |
494 | symtab.limit->name = core_syms[i]->name; | |
495 | symtab.limit->mapped = 0; | |
496 | } | |
497 | ||
ef368dac | 498 | /* Lookup filename and line number, if we can. */ |
252b5132 RH |
499 | { |
500 | const char *filename, *func_name; | |
0eee5820 | 501 | |
252b5132 RH |
502 | if (get_src_info (symtab.limit->addr, &filename, &func_name, |
503 | &symtab.limit->line_num)) | |
504 | { | |
505 | symtab.limit->file = source_file_lookup_path (filename); | |
506 | ||
507 | /* FIXME: Checking __osf__ here does not work with a cross | |
0eee5820 | 508 | gprof. */ |
252b5132 | 509 | #ifdef __osf__ |
ef368dac NC |
510 | /* Suppress symbols that are not function names. This is |
511 | useful to suppress code-labels and aliases. | |
0eee5820 | 512 | |
ef368dac NC |
513 | This is known to be useful under DEC's OSF/1. Under SunOS 4.x, |
514 | labels do not appear in the symbol table info, so this isn't | |
515 | necessary. */ | |
252b5132 RH |
516 | |
517 | if (strcmp (symtab.limit->name, func_name) != 0) | |
518 | { | |
ef368dac NC |
519 | /* The symbol's address maps to a different name, so |
520 | it can't be a function-entry point. This happens | |
521 | for labels, for example. */ | |
252b5132 RH |
522 | DBG (AOUTDEBUG, |
523 | printf ("[core_create_function_syms: rej %s (maps to %s)\n", | |
524 | symtab.limit->name, func_name)); | |
525 | continue; | |
526 | } | |
527 | #endif | |
528 | } | |
529 | } | |
530 | ||
531 | symtab.limit->is_func = TRUE; | |
532 | symtab.limit->is_bb_head = TRUE; | |
0eee5820 | 533 | |
252b5132 | 534 | if (class == 't') |
ef368dac | 535 | symtab.limit->is_static = TRUE; |
252b5132 RH |
536 | |
537 | min_vma = MIN (symtab.limit->addr, min_vma); | |
538 | max_vma = MAX (symtab.limit->addr, max_vma); | |
539 | ||
ef368dac | 540 | /* If we see "main" without an initial '_', we assume names |
0eee5820 | 541 | are *not* prefixed by '_'. */ |
252b5132 RH |
542 | if (symtab.limit->name[0] == 'm' && discard_underscores |
543 | && strcmp (symtab.limit->name, "main") == 0) | |
ef368dac | 544 | discard_underscores = 0; |
252b5132 RH |
545 | |
546 | DBG (AOUTDEBUG, printf ("[core_create_function_syms] %ld %s 0x%lx\n", | |
547 | (long) (symtab.limit - symtab.base), | |
fdcf7d43 ILT |
548 | symtab.limit->name, |
549 | (unsigned long) symtab.limit->addr)); | |
252b5132 RH |
550 | ++symtab.limit; |
551 | } | |
552 | ||
ef368dac | 553 | /* Create sentinels. */ |
252b5132 RH |
554 | sym_init (symtab.limit); |
555 | symtab.limit->name = "<locore>"; | |
556 | symtab.limit->addr = 0; | |
557 | symtab.limit->end_addr = min_vma - 1; | |
558 | ++symtab.limit; | |
559 | ||
560 | sym_init (symtab.limit); | |
561 | symtab.limit->name = "<hicore>"; | |
562 | symtab.limit->addr = max_vma + 1; | |
563 | symtab.limit->end_addr = ~0; | |
564 | ++symtab.limit; | |
565 | ||
566 | symtab.len = symtab.limit - symtab.base; | |
567 | symtab_finalize (&symtab); | |
568 | } | |
569 | ||
ef368dac NC |
570 | /* Read in symbol table from core. |
571 | One symbol per line of source code is entered. */ | |
252b5132 | 572 | |
252b5132 RH |
573 | void |
574 | DEFUN (core_create_line_syms, (core_bfd), bfd * core_bfd) | |
575 | { | |
576 | char *prev_name, *prev_filename; | |
577 | int prev_name_len, prev_filename_len; | |
578 | bfd_vma vma, min_vma = ~0, max_vma = 0; | |
579 | bfd_vma offset; | |
580 | Sym *prev, dummy, *sentinel, *sym; | |
581 | const char *filename; | |
582 | int prev_line_num; | |
583 | Sym_Table ltab; | |
0eee5820 | 584 | |
ef368dac NC |
585 | /* Create symbols for functions as usual. This is necessary in |
586 | cases where parts of a program were not compiled with -g. For | |
587 | those parts we still want to get info at the function level. */ | |
252b5132 RH |
588 | core_create_function_syms (core_bfd); |
589 | ||
ef368dac NC |
590 | /* Pass 1 - counter number of symbols. */ |
591 | ||
592 | /* To find all line information, walk through all possible | |
593 | text-space addresses (one by one!) and get the debugging | |
594 | info for each address. When the debugging info changes, | |
595 | it is time to create a new symbol. | |
0eee5820 | 596 | |
ef368dac NC |
597 | Of course, this is rather slow and it would be better if |
598 | bfd would provide an iterator for enumerating all line infos. */ | |
252b5132 RH |
599 | prev_name_len = PATH_MAX; |
600 | prev_filename_len = PATH_MAX; | |
601 | prev_name = xmalloc (prev_name_len); | |
602 | prev_filename = xmalloc (prev_filename_len); | |
603 | ltab.len = 0; | |
604 | prev_line_num = 0; | |
0eee5820 | 605 | |
252b5132 RH |
606 | for (offset = 0; offset < core_text_sect->_raw_size; offset += min_insn_size) |
607 | { | |
608 | int len; | |
609 | ||
610 | vma = core_text_sect->vma + offset; | |
0eee5820 | 611 | |
252b5132 RH |
612 | if (!get_src_info (vma, &filename, &dummy.name, &dummy.line_num) |
613 | || (prev_line_num == dummy.line_num | |
614 | && prev_name != NULL | |
615 | && strcmp (prev_name, dummy.name) == 0 | |
616 | && strcmp (prev_filename, filename) == 0)) | |
ef368dac | 617 | continue; |
252b5132 RH |
618 | |
619 | ++ltab.len; | |
620 | prev_line_num = dummy.line_num; | |
621 | ||
622 | len = strlen (dummy.name); | |
623 | if (len >= prev_name_len) | |
624 | { | |
625 | prev_name_len = len + 1024; | |
626 | free (prev_name); | |
627 | prev_name = xmalloc (prev_name_len); | |
628 | } | |
0eee5820 | 629 | |
252b5132 | 630 | strcpy (prev_name, dummy.name); |
252b5132 | 631 | len = strlen (filename); |
0eee5820 | 632 | |
252b5132 RH |
633 | if (len >= prev_filename_len) |
634 | { | |
635 | prev_filename_len = len + 1024; | |
636 | free (prev_filename); | |
637 | prev_filename = xmalloc (prev_filename_len); | |
638 | } | |
0eee5820 | 639 | |
252b5132 RH |
640 | strcpy (prev_filename, filename); |
641 | ||
642 | min_vma = MIN (vma, min_vma); | |
643 | max_vma = MAX (vma, max_vma); | |
644 | } | |
645 | ||
646 | free (prev_name); | |
647 | free (prev_filename); | |
648 | ||
ef368dac | 649 | /* Make room for function symbols, too. */ |
252b5132 RH |
650 | ltab.len += symtab.len; |
651 | ltab.base = (Sym *) xmalloc (ltab.len * sizeof (Sym)); | |
652 | ltab.limit = ltab.base; | |
653 | ||
ef368dac | 654 | /* Pass 2 - create symbols. */ |
252b5132 RH |
655 | |
656 | /* We now set is_static as we go along, rather than by running | |
657 | through the symbol table at the end. | |
658 | ||
659 | The old way called symtab_finalize before the is_static pass, | |
660 | causing a problem since symtab_finalize uses is_static as part of | |
661 | its address conflict resolution algorithm. Since global symbols | |
662 | were prefered over static symbols, and all line symbols were | |
663 | global at that point, static function names that conflicted with | |
664 | their own line numbers (static, but labeled as global) were | |
665 | rejected in favor of the line num. | |
666 | ||
667 | This was not the desired functionality. We always want to keep | |
668 | our function symbols and discard any conflicting line symbols. | |
669 | Perhaps symtab_finalize should be modified to make this | |
670 | distinction as well, but the current fix works and the code is a | |
671 | lot cleaner now. */ | |
252b5132 | 672 | prev = 0; |
0eee5820 | 673 | |
252b5132 RH |
674 | for (offset = 0; offset < core_text_sect->_raw_size; offset += min_insn_size) |
675 | { | |
676 | sym_init (ltab.limit); | |
0eee5820 | 677 | |
252b5132 RH |
678 | if (!get_src_info (core_text_sect->vma + offset, &filename, |
679 | <ab.limit->name, <ab.limit->line_num) | |
680 | || (prev && prev->line_num == ltab.limit->line_num | |
681 | && strcmp (prev->name, ltab.limit->name) == 0 | |
682 | && strcmp (prev->file->name, filename) == 0)) | |
ef368dac | 683 | continue; |
252b5132 | 684 | |
ef368dac | 685 | /* Make name pointer a malloc'ed string. */ |
252b5132 RH |
686 | ltab.limit->name = xstrdup (ltab.limit->name); |
687 | ltab.limit->file = source_file_lookup_path (filename); | |
688 | ||
689 | ltab.limit->addr = core_text_sect->vma + offset; | |
690 | ||
691 | /* Set is_static based on the enclosing function, using either: | |
0eee5820 AM |
692 | 1) the previous symbol, if it's from the same function, or |
693 | 2) a symtab lookup. */ | |
252b5132 RH |
694 | if (prev && ltab.limit->file == prev->file && |
695 | strcmp (ltab.limit->name, prev->name) == 0) | |
696 | { | |
697 | ltab.limit->is_static = prev->is_static; | |
698 | } | |
699 | else | |
700 | { | |
701 | sym = sym_lookup(&symtab, ltab.limit->addr); | |
702 | ltab.limit->is_static = sym->is_static; | |
703 | } | |
704 | ||
705 | prev = ltab.limit; | |
706 | ||
ef368dac | 707 | /* If we see "main" without an initial '_', we assume names |
0eee5820 | 708 | are *not* prefixed by '_'. */ |
252b5132 RH |
709 | if (ltab.limit->name[0] == 'm' && discard_underscores |
710 | && strcmp (ltab.limit->name, "main") == 0) | |
ef368dac | 711 | discard_underscores = 0; |
252b5132 | 712 | |
4a607dcc ILT |
713 | DBG (AOUTDEBUG, printf ("[core_create_line_syms] %lu %s 0x%lx\n", |
714 | (unsigned long) (ltab.limit - ltab.base), | |
715 | ltab.limit->name, | |
fdcf7d43 | 716 | (unsigned long) ltab.limit->addr)); |
252b5132 RH |
717 | ++ltab.limit; |
718 | } | |
719 | ||
ef368dac | 720 | /* Update sentinels. */ |
252b5132 | 721 | sentinel = sym_lookup (&symtab, 0); |
0eee5820 | 722 | |
252b5132 RH |
723 | if (strcmp (sentinel->name, "<locore>") == 0 |
724 | && min_vma <= sentinel->end_addr) | |
ef368dac | 725 | sentinel->end_addr = min_vma - 1; |
252b5132 RH |
726 | |
727 | sentinel = sym_lookup (&symtab, ~0); | |
0eee5820 | 728 | |
252b5132 | 729 | if (strcmp (sentinel->name, "<hicore>") == 0 && max_vma >= sentinel->addr) |
ef368dac | 730 | sentinel->addr = max_vma + 1; |
252b5132 | 731 | |
ef368dac | 732 | /* Copy in function symbols. */ |
252b5132 RH |
733 | memcpy (ltab.limit, symtab.base, symtab.len * sizeof (Sym)); |
734 | ltab.limit += symtab.len; | |
735 | ||
736 | if ((unsigned int) (ltab.limit - ltab.base) != ltab.len) | |
737 | { | |
738 | fprintf (stderr, | |
739 | _("%s: somebody miscounted: ltab.len=%d instead of %ld\n"), | |
740 | whoami, ltab.len, (long) (ltab.limit - ltab.base)); | |
741 | done (1); | |
742 | } | |
743 | ||
ef368dac | 744 | /* Finalize ltab and make it symbol table. */ |
252b5132 RH |
745 | symtab_finalize (<ab); |
746 | free (symtab.base); | |
747 | symtab = ltab; | |
252b5132 | 748 | } |