Commit | Line | Data |
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bd5635a1 | 1 | /* Generic symbol file reading for the GNU debugger, GDB. |
30875e1c | 2 | Copyright 1990, 1991, 1992 Free Software Foundation, Inc. |
bd5635a1 RP |
3 | Contributed by Cygnus Support, using pieces from other GDB modules. |
4 | ||
5 | This file is part of GDB. | |
6 | ||
61a7292f | 7 | This program is free software; you can redistribute it and/or modify |
bd5635a1 | 8 | it under the terms of the GNU General Public License as published by |
61a7292f SG |
9 | the Free Software Foundation; either version 2 of the License, or |
10 | (at your option) any later version. | |
bd5635a1 | 11 | |
61a7292f | 12 | This program is distributed in the hope that it will be useful, |
bd5635a1 RP |
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 | |
61a7292f SG |
18 | along with this program; if not, write to the Free Software |
19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
bd5635a1 | 20 | |
bd5635a1 RP |
21 | #include "defs.h" |
22 | #include "symtab.h" | |
30875e1c | 23 | #include "gdbtypes.h" |
bd5635a1 RP |
24 | #include "gdbcore.h" |
25 | #include "frame.h" | |
26 | #include "target.h" | |
27 | #include "value.h" | |
28 | #include "symfile.h" | |
bf349b77 | 29 | #include "objfiles.h" |
bd5635a1 RP |
30 | #include "gdbcmd.h" |
31 | #include "breakpoint.h" | |
32 | ||
33 | #include <obstack.h> | |
34 | #include <assert.h> | |
35 | ||
36 | #include <sys/types.h> | |
37 | #include <fcntl.h> | |
38 | #include <string.h> | |
39 | #include <sys/stat.h> | |
40 | ||
30875e1c SG |
41 | /* Global variables owned by this file */ |
42 | ||
80d68b1d | 43 | int readnow_symbol_files; /* Read full symbols immediately */ |
d47d5315 | 44 | |
30875e1c | 45 | /* External variables and functions referenced. */ |
bd5635a1 | 46 | |
30875e1c | 47 | extern int info_verbose; |
bd5635a1 RP |
48 | |
49 | /* Functions this file defines */ | |
7d9884b9 | 50 | |
30875e1c SG |
51 | static void |
52 | load_command PARAMS ((char *, int)); | |
53 | ||
54 | static void | |
55 | add_symbol_file_command PARAMS ((char *, int)); | |
56 | ||
30875e1c SG |
57 | static void |
58 | cashier_psymtab PARAMS ((struct partial_symtab *)); | |
bd5635a1 | 59 | |
30875e1c SG |
60 | static int |
61 | compare_psymbols PARAMS ((const void *, const void *)); | |
bd5635a1 | 62 | |
30875e1c SG |
63 | static int |
64 | compare_symbols PARAMS ((const void *, const void *)); | |
65 | ||
b0246b3b FF |
66 | static bfd * |
67 | symfile_bfd_open PARAMS ((char *)); | |
30875e1c | 68 | |
80d68b1d FF |
69 | static void |
70 | find_sym_fns PARAMS ((struct objfile *)); | |
30875e1c SG |
71 | |
72 | static void | |
73 | clear_symtab_users_once PARAMS ((void)); | |
bd5635a1 | 74 | |
80d68b1d FF |
75 | /* List of all available sym_fns. On gdb startup, each object file reader |
76 | calls add_symtab_fns() to register information on each format it is | |
77 | prepared to read. */ | |
bd5635a1 | 78 | |
80d68b1d | 79 | static struct sym_fns *symtab_fns = NULL; |
bd5635a1 | 80 | |
bd5635a1 RP |
81 | /* Structures with which to manage partial symbol allocation. */ |
82 | ||
83 | struct psymbol_allocation_list global_psymbols = {0}, static_psymbols = {0}; | |
84 | ||
61a7292f SG |
85 | /* Flag for whether user will be reloading symbols multiple times. |
86 | Defaults to ON for VxWorks, otherwise OFF. */ | |
87 | ||
88 | #ifdef SYMBOL_RELOADING_DEFAULT | |
89 | int symbol_reloading = SYMBOL_RELOADING_DEFAULT; | |
90 | #else | |
91 | int symbol_reloading = 0; | |
92 | #endif | |
93 | ||
bd5635a1 RP |
94 | /* Structure to manage complaints about symbol file contents. */ |
95 | ||
96 | struct complaint complaint_root[1] = { | |
30875e1c | 97 | {(char *) 0, 0, complaint_root}, |
bd5635a1 RP |
98 | }; |
99 | ||
9d199712 JG |
100 | /* Some actual complaints. */ |
101 | ||
102 | struct complaint oldsyms_complaint = { | |
103 | "Replacing old symbols for `%s'", 0, 0 }; | |
104 | ||
105 | struct complaint empty_symtab_complaint = { | |
106 | "Empty symbol table found for `%s'", 0, 0 }; | |
107 | ||
bd5635a1 RP |
108 | \f |
109 | /* In the following sort, we always make sure that | |
110 | register debug symbol declarations always come before regular | |
111 | debug symbol declarations (as might happen when parameters are | |
30875e1c SG |
112 | then put into registers by the compiler). |
113 | ||
114 | Since this function is called from within qsort, in an ANSI environment | |
115 | it must conform to the prototype for qsort, which specifies that the | |
116 | comparison function takes two "void *" pointers. */ | |
bd5635a1 RP |
117 | |
118 | static int | |
30875e1c SG |
119 | compare_symbols (s1p, s2p) |
120 | const PTR s1p; | |
121 | const PTR s2p; | |
bd5635a1 | 122 | { |
30875e1c | 123 | register struct symbol **s1, **s2; |
bd5635a1 RP |
124 | register int namediff; |
125 | ||
30875e1c SG |
126 | s1 = (struct symbol **) s1p; |
127 | s2 = (struct symbol **) s2p; | |
128 | ||
bd5635a1 RP |
129 | /* Compare the initial characters. */ |
130 | namediff = SYMBOL_NAME (*s1)[0] - SYMBOL_NAME (*s2)[0]; | |
131 | if (namediff != 0) return namediff; | |
132 | ||
133 | /* If they match, compare the rest of the names. */ | |
134 | namediff = strcmp (SYMBOL_NAME (*s1), SYMBOL_NAME (*s2)); | |
135 | if (namediff != 0) return namediff; | |
136 | ||
137 | /* For symbols of the same name, registers should come first. */ | |
138 | return ((SYMBOL_CLASS (*s2) == LOC_REGISTER) | |
139 | - (SYMBOL_CLASS (*s1) == LOC_REGISTER)); | |
140 | } | |
141 | ||
30875e1c SG |
142 | /* |
143 | ||
144 | LOCAL FUNCTION | |
145 | ||
146 | compare_psymbols -- compare two partial symbols by name | |
147 | ||
148 | DESCRIPTION | |
149 | ||
150 | Given pointer to two partial symbol table entries, compare | |
151 | them by name and return -N, 0, or +N (ala strcmp). Typically | |
152 | used by sorting routines like qsort(). | |
153 | ||
154 | NOTES | |
155 | ||
156 | Does direct compare of first two characters before punting | |
157 | and passing to strcmp for longer compares. Note that the | |
158 | original version had a bug whereby two null strings or two | |
159 | identically named one character strings would return the | |
160 | comparison of memory following the null byte. | |
161 | ||
162 | */ | |
163 | ||
164 | static int | |
165 | compare_psymbols (s1p, s2p) | |
166 | const PTR s1p; | |
167 | const PTR s2p; | |
168 | { | |
169 | register char *st1 = SYMBOL_NAME ((struct partial_symbol *) s1p); | |
170 | register char *st2 = SYMBOL_NAME ((struct partial_symbol *) s2p); | |
171 | ||
172 | if ((st1[0] - st2[0]) || !st1[0]) | |
173 | { | |
174 | return (st1[0] - st2[0]); | |
175 | } | |
176 | else if ((st1[1] - st2[1]) || !st1[1]) | |
177 | { | |
178 | return (st1[1] - st2[1]); | |
179 | } | |
180 | else | |
181 | { | |
182 | return (strcmp (st1 + 2, st2 + 2)); | |
183 | } | |
184 | } | |
185 | ||
186 | void | |
187 | sort_pst_symbols (pst) | |
188 | struct partial_symtab *pst; | |
189 | { | |
190 | /* Sort the global list; don't sort the static list */ | |
191 | ||
192 | qsort (pst -> objfile -> global_psymbols.list + pst -> globals_offset, | |
193 | pst -> n_global_syms, sizeof (struct partial_symbol), | |
194 | compare_psymbols); | |
195 | } | |
196 | ||
bd5635a1 RP |
197 | /* Call sort_block_syms to sort alphabetically the symbols of one block. */ |
198 | ||
199 | void | |
200 | sort_block_syms (b) | |
201 | register struct block *b; | |
202 | { | |
203 | qsort (&BLOCK_SYM (b, 0), BLOCK_NSYMS (b), | |
204 | sizeof (struct symbol *), compare_symbols); | |
205 | } | |
206 | ||
207 | /* Call sort_symtab_syms to sort alphabetically | |
208 | the symbols of each block of one symtab. */ | |
209 | ||
210 | void | |
211 | sort_symtab_syms (s) | |
212 | register struct symtab *s; | |
213 | { | |
c9bd6710 JG |
214 | register struct blockvector *bv; |
215 | int nbl; | |
bd5635a1 RP |
216 | int i; |
217 | register struct block *b; | |
218 | ||
c9bd6710 JG |
219 | if (s == 0) |
220 | return; | |
221 | bv = BLOCKVECTOR (s); | |
222 | nbl = BLOCKVECTOR_NBLOCKS (bv); | |
bd5635a1 RP |
223 | for (i = 0; i < nbl; i++) |
224 | { | |
225 | b = BLOCKVECTOR_BLOCK (bv, i); | |
226 | if (BLOCK_SHOULD_SORT (b)) | |
227 | sort_block_syms (b); | |
228 | } | |
229 | } | |
230 | ||
231 | void | |
232 | sort_all_symtab_syms () | |
233 | { | |
234 | register struct symtab *s; | |
30875e1c | 235 | register struct objfile *objfile; |
bd5635a1 | 236 | |
30875e1c | 237 | for (objfile = object_files; objfile != NULL; objfile = objfile -> next) |
bd5635a1 | 238 | { |
30875e1c SG |
239 | for (s = objfile -> symtabs; s != NULL; s = s -> next) |
240 | { | |
241 | sort_symtab_syms (s); | |
242 | } | |
bd5635a1 RP |
243 | } |
244 | } | |
245 | ||
246 | /* Make a copy of the string at PTR with SIZE characters in the symbol obstack | |
247 | (and add a null character at the end in the copy). | |
248 | Returns the address of the copy. */ | |
249 | ||
250 | char * | |
30875e1c | 251 | obsavestring (ptr, size, obstackp) |
bd5635a1 RP |
252 | char *ptr; |
253 | int size; | |
30875e1c | 254 | struct obstack *obstackp; |
bd5635a1 | 255 | { |
30875e1c | 256 | register char *p = (char *) obstack_alloc (obstackp, size + 1); |
bd5635a1 RP |
257 | /* Open-coded bcopy--saves function call time. |
258 | These strings are usually short. */ | |
259 | { | |
260 | register char *p1 = ptr; | |
261 | register char *p2 = p; | |
262 | char *end = ptr + size; | |
263 | while (p1 != end) | |
264 | *p2++ = *p1++; | |
265 | } | |
266 | p[size] = 0; | |
267 | return p; | |
268 | } | |
269 | ||
270 | /* Concatenate strings S1, S2 and S3; return the new string. | |
271 | Space is found in the symbol_obstack. */ | |
272 | ||
273 | char * | |
30875e1c SG |
274 | obconcat (obstackp, s1, s2, s3) |
275 | struct obstack *obstackp; | |
276 | const char *s1, *s2, *s3; | |
bd5635a1 RP |
277 | { |
278 | register int len = strlen (s1) + strlen (s2) + strlen (s3) + 1; | |
30875e1c | 279 | register char *val = (char *) obstack_alloc (obstackp, len); |
bd5635a1 RP |
280 | strcpy (val, s1); |
281 | strcat (val, s2); | |
282 | strcat (val, s3); | |
283 | return val; | |
284 | } | |
bd5635a1 RP |
285 | |
286 | /* Get the symbol table that corresponds to a partial_symtab. | |
287 | This is fast after the first time you do it. In fact, there | |
288 | is an even faster macro PSYMTAB_TO_SYMTAB that does the fast | |
289 | case inline. */ | |
290 | ||
291 | struct symtab * | |
292 | psymtab_to_symtab (pst) | |
293 | register struct partial_symtab *pst; | |
294 | { | |
bd5635a1 RP |
295 | /* If it's been looked up before, return it. */ |
296 | if (pst->symtab) | |
297 | return pst->symtab; | |
298 | ||
299 | /* If it has not yet been read in, read it. */ | |
300 | if (!pst->readin) | |
301 | { | |
302 | (*pst->read_symtab) (pst); | |
303 | } | |
304 | ||
61a7292f | 305 | return pst->symtab; |
bd5635a1 RP |
306 | } |
307 | ||
bf349b77 FF |
308 | /* Initialize entry point information for this objfile. */ |
309 | ||
310 | void | |
311 | init_entry_point_info (objfile) | |
312 | struct objfile *objfile; | |
313 | { | |
314 | /* Save startup file's range of PC addresses to help blockframe.c | |
315 | decide where the bottom of the stack is. */ | |
316 | ||
317 | if (bfd_get_file_flags (objfile -> obfd) & EXEC_P) | |
318 | { | |
319 | /* Executable file -- record its entry point so we'll recognize | |
320 | the startup file because it contains the entry point. */ | |
321 | objfile -> ei.entry_point = bfd_get_start_address (objfile -> obfd); | |
322 | } | |
323 | else | |
324 | { | |
325 | /* Examination of non-executable.o files. Short-circuit this stuff. */ | |
326 | /* ~0 will not be in any file, we hope. */ | |
327 | objfile -> ei.entry_point = ~0; | |
328 | /* set the startup file to be an empty range. */ | |
329 | objfile -> ei.entry_file_lowpc = 0; | |
330 | objfile -> ei.entry_file_highpc = 0; | |
331 | } | |
332 | } | |
333 | ||
bd5635a1 RP |
334 | /* Process a symbol file, as either the main file or as a dynamically |
335 | loaded file. | |
336 | ||
b3fdaf3d JK |
337 | NAME is the file name (which will be tilde-expanded and made |
338 | absolute herein) (but we don't free or modify NAME itself). | |
339 | FROM_TTY says how verbose to be. MAINLINE specifies whether this | |
340 | is the main symbol file, or whether it's an extra symbol file such | |
341 | as dynamically loaded code. If !mainline, ADDR is the address | |
4369a140 JG |
342 | where the text segment was loaded. If VERBO, the caller has printed |
343 | a verbose message about the symbol reading (and complaints can be | |
344 | more terse about it). */ | |
bd5635a1 RP |
345 | |
346 | void | |
4369a140 | 347 | syms_from_objfile (objfile, addr, mainline, verbo) |
7d9884b9 | 348 | struct objfile *objfile; |
bd5635a1 RP |
349 | CORE_ADDR addr; |
350 | int mainline; | |
4369a140 | 351 | int verbo; |
bd5635a1 | 352 | { |
bd5635a1 | 353 | asection *text_sect; |
bd5635a1 | 354 | |
bd5635a1 RP |
355 | /* There is a distinction between having no symbol table |
356 | (we refuse to read the file, leaving the old set of symbols around) | |
357 | and having no debugging symbols in your symbol table (we read | |
bf349b77 FF |
358 | the file and end up with a mostly empty symbol table). |
359 | ||
360 | FIXME: This strategy works correctly when the debugging symbols are | |
361 | intermixed with "normal" symbols. However, when the debugging symbols | |
362 | are separate, such as with ELF/DWARF, it is perfectly plausible for | |
363 | the symbol table to be missing but still have all the DWARF info | |
364 | intact. Thus in general it is wrong to assume that having no symbol | |
365 | table implies no debugging information. */ | |
bd5635a1 | 366 | |
b0246b3b | 367 | if (!(bfd_get_file_flags (objfile -> obfd) & HAS_SYMS)) |
d47d5315 JG |
368 | return; |
369 | ||
bf349b77 | 370 | init_entry_point_info (objfile); |
80d68b1d | 371 | find_sym_fns (objfile); |
bd5635a1 RP |
372 | |
373 | if (mainline) | |
374 | { | |
375 | /* Since no error yet, throw away the old symbol table. */ | |
376 | ||
80d68b1d FF |
377 | if (symfile_objfile != NULL) |
378 | { | |
379 | free_objfile (symfile_objfile); | |
380 | symfile_objfile = NULL; | |
381 | } | |
bd5635a1 | 382 | |
80d68b1d | 383 | (*objfile -> sf -> sym_new_init) (objfile); |
bd5635a1 RP |
384 | |
385 | /* For mainline, caller didn't know the specified address of the | |
386 | text section. We fix that here. */ | |
80d68b1d | 387 | |
b0246b3b FF |
388 | text_sect = bfd_get_section_by_name (objfile -> obfd, ".text"); |
389 | addr = bfd_section_vma (objfile -> obfd, text_sect); | |
bd5635a1 RP |
390 | } |
391 | ||
80d68b1d FF |
392 | /* Initialize symbol reading routines for this objfile, allow complaints to |
393 | appear for this new file, and record how verbose to be, then do the | |
394 | initial symbol reading for this file. */ | |
4369a140 | 395 | |
80d68b1d FF |
396 | (*objfile -> sf -> sym_init) (objfile); |
397 | clear_complaints (1, verbo); | |
398 | (*objfile -> sf -> sym_read) (objfile, addr, mainline); | |
bd5635a1 RP |
399 | |
400 | /* Don't allow char * to have a typename (else would get caddr_t.) */ | |
401 | /* Ditto void *. FIXME should do this for all the builtin types. */ | |
402 | ||
403 | TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0; | |
404 | TYPE_NAME (lookup_pointer_type (builtin_type_void)) = 0; | |
405 | ||
406 | if (mainline) | |
407 | { | |
408 | /* OK, make it the "real" symbol file. */ | |
7d9884b9 | 409 | symfile_objfile = objfile; |
bd5635a1 RP |
410 | } |
411 | ||
0ef6f019 JG |
412 | /* If we have wiped out any old symbol tables, clean up. */ |
413 | clear_symtab_users_once (); | |
4369a140 JG |
414 | |
415 | /* We're done reading the symbol file; finish off complaints. */ | |
80d68b1d | 416 | clear_complaints (0, verbo); |
30875e1c | 417 | |
318bf84f FF |
418 | /* Fixup all the breakpoints that may have been redefined by this |
419 | symbol file. */ | |
30875e1c | 420 | |
318bf84f | 421 | breakpoint_re_set (); |
30875e1c | 422 | } |
d47d5315 JG |
423 | |
424 | /* Process a symbol file, as either the main file or as a dynamically | |
425 | loaded file. | |
426 | ||
427 | NAME is the file name (which will be tilde-expanded and made | |
428 | absolute herein) (but we don't free or modify NAME itself). | |
429 | FROM_TTY says how verbose to be. MAINLINE specifies whether this | |
430 | is the main symbol file, or whether it's an extra symbol file such | |
431 | as dynamically loaded code. If !mainline, ADDR is the address | |
30875e1c | 432 | where the text segment was loaded. |
d47d5315 | 433 | |
30875e1c SG |
434 | Upon success, returns a pointer to the objfile that was added. |
435 | Upon failure, jumps back to command level (never returns). */ | |
436 | ||
437 | struct objfile * | |
b0246b3b | 438 | symbol_file_add (name, from_tty, addr, mainline, mapped, readnow) |
d47d5315 JG |
439 | char *name; |
440 | int from_tty; | |
441 | CORE_ADDR addr; | |
442 | int mainline; | |
318bf84f | 443 | int mapped; |
b0246b3b | 444 | int readnow; |
d47d5315 | 445 | { |
7d9884b9 | 446 | struct objfile *objfile; |
b0246b3b | 447 | struct partial_symtab *psymtab; |
80d68b1d | 448 | bfd *abfd; |
d47d5315 | 449 | |
80d68b1d FF |
450 | /* Open a bfd for the file and then check to see if the file has a |
451 | symbol table. There is a distinction between having no symbol table | |
d47d5315 | 452 | (we refuse to read the file, leaving the old set of symbols around) |
80d68b1d FF |
453 | and having no debugging symbols in the symbol table (we read the file |
454 | and end up with a mostly empty symbol table, but with lots of stuff in | |
455 | the minimal symbol table). We need to make the decision about whether | |
456 | to continue with the file before allocating and building a objfile. | |
457 | ||
458 | FIXME: This strategy works correctly when the debugging symbols are | |
459 | intermixed with "normal" symbols. However, when the debugging symbols | |
460 | are separate, such as with ELF/DWARF, it is perfectly plausible for | |
461 | the symbol table to be missing but still have all the DWARF info | |
462 | intact. Thus in general it is wrong to assume that having no symbol | |
463 | table implies no debugging information. */ | |
464 | ||
465 | abfd = symfile_bfd_open (name); | |
466 | if (!(bfd_get_file_flags (abfd) & HAS_SYMS)) | |
d47d5315 JG |
467 | { |
468 | error ("%s has no symbol-table", name); | |
469 | } | |
470 | ||
80d68b1d FF |
471 | if ((have_full_symbols () || have_partial_symbols ()) |
472 | && mainline | |
473 | && from_tty | |
474 | && !query ("Load new symbol table from \"%s\"? ", name)) | |
475 | error ("Not confirmed."); | |
476 | ||
477 | objfile = allocate_objfile (abfd, mapped); | |
478 | ||
318bf84f FF |
479 | /* If the objfile uses a mapped symbol file, and we have a psymtab for |
480 | it, then skip reading any symbols at this time. */ | |
d47d5315 | 481 | |
bf349b77 | 482 | if ((objfile -> flags & OBJF_MAPPED) && (objfile -> flags & OBJF_SYMS)) |
d47d5315 | 483 | { |
80d68b1d | 484 | /* We mapped in an existing symbol table file that already has had |
bf349b77 FF |
485 | initial symbol reading performed, so we can skip that part. Notify |
486 | the user that instead of reading the symbols, they have been mapped. | |
487 | */ | |
318bf84f FF |
488 | if (from_tty || info_verbose) |
489 | { | |
80d68b1d FF |
490 | printf_filtered ("Mapped symbols for %s...", name); |
491 | wrap_here (""); | |
318bf84f FF |
492 | fflush (stdout); |
493 | } | |
d47d5315 | 494 | } |
318bf84f | 495 | else |
bd5635a1 | 496 | { |
80d68b1d | 497 | /* We either created a new mapped symbol table, mapped an existing |
bf349b77 FF |
498 | symbol table file which has not had initial symbol reading |
499 | performed, or need to read an unmapped symbol table. */ | |
318bf84f FF |
500 | if (from_tty || info_verbose) |
501 | { | |
502 | printf_filtered ("Reading symbols from %s...", name); | |
503 | wrap_here (""); | |
504 | fflush (stdout); | |
505 | } | |
318bf84f | 506 | syms_from_objfile (objfile, addr, mainline, from_tty); |
bf349b77 | 507 | objfile -> flags |= OBJF_SYMS; |
80d68b1d FF |
508 | } |
509 | ||
510 | /* We now have at least a partial symbol table. Check to see if the | |
511 | user requested that all symbols be read on initial access via either | |
512 | the gdb startup command line or on a per symbol file basis. Expand | |
513 | all partial symbol tables for this objfile if so. */ | |
b0246b3b | 514 | |
bf349b77 | 515 | if (readnow || readnow_symbol_files) |
80d68b1d | 516 | { |
318bf84f FF |
517 | if (from_tty || info_verbose) |
518 | { | |
80d68b1d FF |
519 | printf_filtered ("expanding to full symbols..."); |
520 | wrap_here (""); | |
318bf84f FF |
521 | fflush (stdout); |
522 | } | |
80d68b1d FF |
523 | |
524 | for (psymtab = objfile -> psymtabs; | |
525 | psymtab != NULL; | |
526 | psymtab = psymtab -> next) | |
527 | { | |
528 | (void) psymtab_to_symtab (psymtab); | |
529 | } | |
530 | } | |
531 | ||
532 | if (from_tty || info_verbose) | |
533 | { | |
534 | printf_filtered ("done.\n"); | |
535 | fflush (stdout); | |
bd5635a1 | 536 | } |
80d68b1d | 537 | |
30875e1c | 538 | return (objfile); |
bd5635a1 RP |
539 | } |
540 | ||
541 | /* This is the symbol-file command. Read the file, analyze its symbols, | |
30875e1c | 542 | and add a struct symtab to a symtab list. */ |
bd5635a1 RP |
543 | |
544 | void | |
30875e1c SG |
545 | symbol_file_command (args, from_tty) |
546 | char *args; | |
bd5635a1 RP |
547 | int from_tty; |
548 | { | |
30875e1c | 549 | char **argv; |
b0246b3b | 550 | char *name = NULL; |
30875e1c | 551 | struct cleanup *cleanups; |
318bf84f | 552 | int mapped = 0; |
30875e1c | 553 | int readnow = 0; |
bd5635a1 RP |
554 | |
555 | dont_repeat (); | |
556 | ||
30875e1c | 557 | if (args == NULL) |
bd5635a1 | 558 | { |
cba0d141 JG |
559 | if ((have_full_symbols () || have_partial_symbols ()) |
560 | && from_tty | |
561 | && !query ("Discard symbol table from `%s'? ", | |
562 | symfile_objfile -> name)) | |
563 | error ("Not confirmed."); | |
564 | free_all_objfiles (); | |
30875e1c | 565 | symfile_objfile = NULL; |
bd5635a1 | 566 | } |
30875e1c SG |
567 | else |
568 | { | |
569 | if ((argv = buildargv (args)) == NULL) | |
570 | { | |
318bf84f | 571 | nomem (0); |
30875e1c SG |
572 | } |
573 | cleanups = make_cleanup (freeargv, (char *) argv); | |
b0246b3b | 574 | while (*argv != NULL) |
30875e1c | 575 | { |
b0246b3b | 576 | if (strcmp (*argv, "-mapped") == 0) |
30875e1c | 577 | { |
318bf84f | 578 | mapped = 1; |
30875e1c | 579 | } |
b0246b3b | 580 | else if (strcmp (*argv, "-readnow") == 0) |
30875e1c SG |
581 | { |
582 | readnow = 1; | |
583 | } | |
b0246b3b FF |
584 | else if (**argv == '-') |
585 | { | |
586 | error ("unknown option `%s'", *argv); | |
587 | } | |
588 | else | |
589 | { | |
590 | name = *argv; | |
591 | } | |
592 | argv++; | |
30875e1c | 593 | } |
2403f49b | 594 | |
b0246b3b FF |
595 | if (name == NULL) |
596 | { | |
597 | error ("no symbol file name was specified"); | |
598 | } | |
599 | else | |
30875e1c | 600 | { |
318bf84f FF |
601 | /* Getting new symbols may change our opinion about what is |
602 | frameless. */ | |
603 | reinit_frame_cache (); | |
ac88ca20 | 604 | (void) symbol_file_add (name, from_tty, (CORE_ADDR)0, 1, |
b0246b3b | 605 | mapped, readnow); |
30875e1c SG |
606 | } |
607 | do_cleanups (cleanups); | |
608 | } | |
bd5635a1 RP |
609 | } |
610 | ||
b0246b3b FF |
611 | /* Open file specified by NAME and hand it off to BFD for preliminary |
612 | analysis. Result is a newly initialized bfd *, which includes a newly | |
613 | malloc'd` copy of NAME (tilde-expanded and made absolute). | |
7d9884b9 | 614 | In case of trouble, error() is called. */ |
bd5635a1 | 615 | |
b0246b3b FF |
616 | static bfd * |
617 | symfile_bfd_open (name) | |
bd5635a1 RP |
618 | char *name; |
619 | { | |
620 | bfd *sym_bfd; | |
621 | int desc; | |
622 | char *absolute_name; | |
623 | ||
7d9884b9 | 624 | name = tilde_expand (name); /* Returns 1st new malloc'd copy */ |
bd5635a1 | 625 | |
7d9884b9 | 626 | /* Look down path for it, allocate 2nd new malloc'd copy. */ |
bd5635a1 | 627 | desc = openp (getenv ("PATH"), 1, name, O_RDONLY, 0, &absolute_name); |
b0246b3b FF |
628 | if (desc < 0) |
629 | { | |
630 | make_cleanup (free, name); | |
631 | perror_with_name (name); | |
632 | } | |
7d9884b9 | 633 | free (name); /* Free 1st new malloc'd copy */ |
30875e1c | 634 | name = absolute_name; /* Keep 2nd malloc'd copy in bfd */ |
bd5635a1 RP |
635 | |
636 | sym_bfd = bfd_fdopenr (name, NULL, desc); | |
637 | if (!sym_bfd) | |
638 | { | |
639 | close (desc); | |
7d9884b9 | 640 | make_cleanup (free, name); |
b0246b3b FF |
641 | error ("\"%s\": can't open to read symbols: %s.", name, |
642 | bfd_errmsg (bfd_error)); | |
bd5635a1 | 643 | } |
bd5635a1 | 644 | |
b0246b3b FF |
645 | if (!bfd_check_format (sym_bfd, bfd_object)) |
646 | { | |
647 | bfd_close (sym_bfd); /* This also closes desc */ | |
648 | make_cleanup (free, name); | |
649 | error ("\"%s\": can't read symbols: %s.", name, | |
650 | bfd_errmsg (bfd_error)); | |
651 | } | |
7d9884b9 | 652 | |
b0246b3b | 653 | return (sym_bfd); |
7d9884b9 JG |
654 | } |
655 | ||
80d68b1d FF |
656 | /* Link a new symtab_fns into the global symtab_fns list. Called on gdb |
657 | startup by the _initialize routine in each object file format reader, | |
658 | to register information about each format the the reader is prepared | |
659 | to handle. */ | |
bd5635a1 RP |
660 | |
661 | void | |
662 | add_symtab_fns (sf) | |
663 | struct sym_fns *sf; | |
664 | { | |
665 | sf->next = symtab_fns; | |
666 | symtab_fns = sf; | |
667 | } | |
668 | ||
669 | ||
670 | /* Initialize to read symbols from the symbol file sym_bfd. It either | |
80d68b1d FF |
671 | returns or calls error(). The result is an initialized struct sym_fns |
672 | in the objfile structure, that contains cached information about the | |
673 | symbol file. */ | |
bd5635a1 | 674 | |
80d68b1d FF |
675 | static void |
676 | find_sym_fns (objfile) | |
7d9884b9 | 677 | struct objfile *objfile; |
bd5635a1 | 678 | { |
ac88ca20 | 679 | struct sym_fns *sf; |
bd5635a1 | 680 | |
80d68b1d | 681 | for (sf = symtab_fns; sf != NULL; sf = sf -> next) |
bd5635a1 | 682 | { |
80d68b1d FF |
683 | if (strncmp (bfd_get_target (objfile -> obfd), |
684 | sf -> sym_name, sf -> sym_namelen) == 0) | |
bd5635a1 | 685 | { |
80d68b1d FF |
686 | objfile -> sf = sf; |
687 | return; | |
bd5635a1 RP |
688 | } |
689 | } | |
c9bd6710 | 690 | error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.", |
b0246b3b | 691 | bfd_get_target (objfile -> obfd)); |
bd5635a1 RP |
692 | } |
693 | \f | |
694 | /* This function runs the load command of our current target. */ | |
695 | ||
30875e1c | 696 | static void |
bd5635a1 RP |
697 | load_command (arg, from_tty) |
698 | char *arg; | |
699 | int from_tty; | |
700 | { | |
701 | target_load (arg, from_tty); | |
702 | } | |
703 | ||
61a7292f SG |
704 | /* This function allows the addition of incrementally linked object files. |
705 | It does not modify any state in the target, only in the debugger. */ | |
bd5635a1 | 706 | |
e1ce8aa5 | 707 | /* ARGSUSED */ |
30875e1c | 708 | static void |
b0246b3b FF |
709 | add_symbol_file_command (args, from_tty) |
710 | char *args; | |
bd5635a1 RP |
711 | int from_tty; |
712 | { | |
b0246b3b | 713 | char *name = NULL; |
bd5635a1 | 714 | CORE_ADDR text_addr; |
b0246b3b | 715 | char *arg; |
ac88ca20 JG |
716 | int readnow = 0; |
717 | int mapped = 0; | |
bd5635a1 | 718 | |
b0246b3b | 719 | dont_repeat (); |
61a7292f | 720 | |
b0246b3b FF |
721 | if (args == NULL) |
722 | { | |
723 | error ("add-symbol-file takes a file name and an address"); | |
724 | } | |
bd5635a1 | 725 | |
b0246b3b | 726 | /* Make a copy of the string that we can safely write into. */ |
bd5635a1 | 727 | |
b0246b3b FF |
728 | args = strdup (args); |
729 | make_cleanup (free, args); | |
730 | ||
731 | /* Pick off any -option args and the file name. */ | |
732 | ||
733 | while ((*args != '\000') && (name == NULL)) | |
734 | { | |
735 | while (isspace (*args)) {args++;} | |
736 | arg = args; | |
737 | while ((*args != '\000') && !isspace (*args)) {args++;} | |
738 | if (*args != '\000') | |
739 | { | |
740 | *args++ = '\000'; | |
741 | } | |
742 | if (*arg != '-') | |
743 | { | |
744 | name = arg; | |
745 | } | |
746 | else if (strcmp (arg, "-mapped") == 0) | |
747 | { | |
748 | mapped = 1; | |
749 | } | |
750 | else if (strcmp (arg, "-readnow") == 0) | |
751 | { | |
752 | readnow = 1; | |
753 | } | |
754 | else | |
755 | { | |
756 | error ("unknown option `%s'", arg); | |
757 | } | |
758 | } | |
bd5635a1 | 759 | |
b0246b3b FF |
760 | /* After picking off any options and the file name, args should be |
761 | left pointing at the remainder of the command line, which should | |
762 | be the address expression to evaluate. */ | |
bd5635a1 | 763 | |
b0246b3b FF |
764 | if ((name == NULL) || (*args == '\000') ) |
765 | { | |
766 | error ("add-symbol-file takes a file name and an address"); | |
767 | } | |
768 | name = tilde_expand (name); | |
769 | make_cleanup (free, name); | |
bd5635a1 | 770 | |
b0246b3b | 771 | text_addr = parse_and_eval_address (args); |
bd5635a1 | 772 | |
d8ce1326 JG |
773 | if (!query ("add symbol table from file \"%s\" at text_addr = %s?\n", |
774 | name, local_hex_string (text_addr))) | |
bd5635a1 RP |
775 | error ("Not confirmed."); |
776 | ||
b0246b3b FF |
777 | /* Getting new symbols may change our opinion about what is |
778 | frameless. */ | |
779 | ||
780 | reinit_frame_cache (); | |
781 | ||
782 | (void) symbol_file_add (name, 0, text_addr, 0, mapped, readnow); | |
bd5635a1 RP |
783 | } |
784 | \f | |
7d9884b9 | 785 | /* Re-read symbols if a symbol-file has changed. */ |
bd5635a1 RP |
786 | void |
787 | reread_symbols () | |
788 | { | |
7d9884b9 JG |
789 | struct objfile *objfile; |
790 | long new_modtime; | |
791 | int reread_one = 0; | |
cba0d141 JG |
792 | struct stat new_statbuf; |
793 | int res; | |
bd5635a1 RP |
794 | |
795 | /* With the addition of shared libraries, this should be modified, | |
796 | the load time should be saved in the partial symbol tables, since | |
797 | different tables may come from different source files. FIXME. | |
798 | This routine should then walk down each partial symbol table | |
30875e1c | 799 | and see if the symbol table that it originates from has been changed */ |
bd5635a1 | 800 | |
30875e1c | 801 | the_big_top: |
7d9884b9 JG |
802 | for (objfile = object_files; objfile; objfile = objfile->next) { |
803 | if (objfile->obfd) { | |
1eeba686 | 804 | #ifdef IBM6000_TARGET |
318bf84f FF |
805 | /* If this object is from a shared library, then you should |
806 | stat on the library name, not member name. */ | |
807 | ||
808 | if (objfile->obfd->my_archive) | |
809 | res = stat (objfile->obfd->my_archive->filename, &new_statbuf); | |
810 | else | |
811 | #endif | |
cba0d141 JG |
812 | res = stat (objfile->name, &new_statbuf); |
813 | if (res != 0) { | |
814 | /* FIXME, should use print_sys_errmsg but it's not filtered. */ | |
815 | printf_filtered ("`%s' has disappeared; keeping its symbols.\n", | |
816 | objfile->name); | |
817 | continue; | |
818 | } | |
819 | new_modtime = new_statbuf.st_mtime; | |
7d9884b9 JG |
820 | if (new_modtime != objfile->mtime) { |
821 | printf_filtered ("`%s' has changed; re-reading symbols.\n", | |
822 | objfile->name); | |
823 | /* FIXME, this should use a different command...that would only | |
30875e1c SG |
824 | affect this objfile's symbols, and would reset objfile->mtime. |
825 | (objfile->mtime = new_modtime;) | |
826 | HOWEVER, that command isn't written yet -- so call symbol_file_ | |
827 | command, and restart the scan from the top, because it munges | |
828 | the object_files list. */ | |
7d9884b9 | 829 | symbol_file_command (objfile->name, 0); |
7d9884b9 | 830 | reread_one = 1; |
30875e1c | 831 | goto the_big_top; /* Start over. */ |
7d9884b9 | 832 | } |
bd5635a1 | 833 | } |
7d9884b9 JG |
834 | } |
835 | ||
836 | if (reread_one) | |
837 | breakpoint_re_set (); | |
bd5635a1 | 838 | } |
bd5635a1 RP |
839 | \f |
840 | /* Functions to handle complaints during symbol reading. */ | |
841 | ||
842 | /* How many complaints about a particular thing should be printed before | |
61a7292f SG |
843 | we stop whining about it? Default is no whining at all, since so many |
844 | systems have ill-constructed symbol files. */ | |
bd5635a1 | 845 | |
61a7292f | 846 | static unsigned stop_whining = 0; |
bd5635a1 | 847 | |
4369a140 JG |
848 | /* Should each complaint be self explanatory, or should we assume that |
849 | a series of complaints is being produced? | |
850 | case 0: self explanatory message. | |
851 | case 1: First message of a series that must start off with explanation. | |
852 | case 2: Subsequent message, when user already knows we are reading | |
853 | symbols and we can just state our piece. */ | |
854 | ||
855 | static int complaint_series = 0; | |
856 | ||
bd5635a1 | 857 | /* Print a complaint about the input symbols, and link the complaint block |
7d9884b9 | 858 | into a chain for later handling. */ |
bd5635a1 | 859 | |
7d9884b9 | 860 | void |
bd5635a1 RP |
861 | complain (complaint, val) |
862 | struct complaint *complaint; | |
863 | char *val; | |
864 | { | |
865 | complaint->counter++; | |
866 | if (complaint->next == 0) { | |
867 | complaint->next = complaint_root->next; | |
868 | complaint_root->next = complaint; | |
869 | } | |
870 | if (complaint->counter > stop_whining) | |
7d9884b9 | 871 | return; |
bd5635a1 | 872 | wrap_here (""); |
4369a140 JG |
873 | |
874 | switch (complaint_series + (info_verbose << 1)) { | |
875 | ||
876 | /* Isolated messages, must be self-explanatory. */ | |
877 | case 0: | |
878 | puts_filtered ("During symbol reading, "); | |
879 | wrap_here(""); | |
880 | printf_filtered (complaint->message, val); | |
881 | puts_filtered (".\n"); | |
882 | break; | |
883 | ||
884 | /* First of a series, without `set verbose'. */ | |
885 | case 1: | |
bd5635a1 | 886 | puts_filtered ("During symbol reading..."); |
4369a140 JG |
887 | printf_filtered (complaint->message, val); |
888 | puts_filtered ("..."); | |
889 | wrap_here(""); | |
890 | complaint_series++; | |
891 | break; | |
892 | ||
893 | /* Subsequent messages of a series, or messages under `set verbose'. | |
894 | (We'll already have produced a "Reading in symbols for XXX..." message | |
895 | and will clean up at the end with a newline.) */ | |
896 | default: | |
897 | printf_filtered (complaint->message, val); | |
898 | puts_filtered ("..."); | |
899 | wrap_here(""); | |
bd5635a1 | 900 | } |
bd5635a1 RP |
901 | } |
902 | ||
4369a140 JG |
903 | /* Clear out all complaint counters that have ever been incremented. |
904 | If sym_reading is 1, be less verbose about successive complaints, | |
905 | since the messages are appearing all together during a command that | |
906 | reads symbols (rather than scattered around as psymtabs get fleshed | |
907 | out into symtabs at random times). If noisy is 1, we are in a | |
908 | noisy symbol reading command, and our caller will print enough | |
909 | context for the user to figure it out. */ | |
bd5635a1 RP |
910 | |
911 | void | |
4369a140 JG |
912 | clear_complaints (sym_reading, noisy) |
913 | int sym_reading; | |
914 | int noisy; | |
bd5635a1 RP |
915 | { |
916 | struct complaint *p; | |
917 | ||
918 | for (p = complaint_root->next; p != complaint_root; p = p->next) | |
919 | p->counter = 0; | |
4369a140 JG |
920 | |
921 | if (!sym_reading && !noisy && complaint_series > 1) { | |
922 | /* Terminate previous series, since caller won't. */ | |
923 | puts_filtered ("\n"); | |
924 | } | |
925 | ||
926 | complaint_series = sym_reading? 1 + noisy: 0; | |
bd5635a1 RP |
927 | } |
928 | \f | |
7d9884b9 JG |
929 | enum language |
930 | deduce_language_from_filename (filename) | |
931 | char *filename; | |
932 | { | |
30875e1c | 933 | char *c = strrchr (filename, '.'); |
7d9884b9 JG |
934 | |
935 | if (!c) ; /* Get default. */ | |
936 | else if(!strcmp(c,".mod")) | |
937 | return language_m2; | |
938 | else if(!strcmp(c,".c")) | |
939 | return language_c; | |
940 | else if(!strcmp(c,".cc") || !strcmp(c,".C")) | |
941 | return language_cplus; | |
942 | ||
943 | return language_unknown; /* default */ | |
944 | } | |
945 | \f | |
d8ce1326 JG |
946 | /* allocate_symtab: |
947 | ||
948 | Allocate and partly initialize a new symbol table. Return a pointer | |
949 | to it. error() if no space. | |
950 | ||
951 | Caller must set these fields: | |
952 | LINETABLE(symtab) | |
953 | symtab->blockvector | |
d8ce1326 JG |
954 | symtab->dirname |
955 | symtab->free_code | |
956 | symtab->free_ptr | |
957 | initialize any EXTRA_SYMTAB_INFO | |
958 | possibly free_named_symtabs (symtab->filename); | |
d8ce1326 JG |
959 | */ |
960 | ||
961 | struct symtab * | |
30875e1c SG |
962 | allocate_symtab (filename, objfile) |
963 | char *filename; | |
964 | struct objfile *objfile; | |
d8ce1326 JG |
965 | { |
966 | register struct symtab *symtab; | |
d8ce1326 | 967 | |
30875e1c SG |
968 | symtab = (struct symtab *) |
969 | obstack_alloc (&objfile -> symbol_obstack, sizeof (struct symtab)); | |
970 | (void) memset (symtab, 0, sizeof (*symtab)); | |
971 | symtab -> filename = obsavestring (filename, strlen (filename), | |
972 | &objfile -> symbol_obstack); | |
973 | symtab -> fullname = NULL; | |
974 | symtab -> language = deduce_language_from_filename (filename); | |
d8ce1326 | 975 | |
7d9884b9 | 976 | /* Hook it to the objfile it comes from */ |
30875e1c SG |
977 | |
978 | symtab -> objfile = objfile; | |
979 | symtab -> next = objfile -> symtabs; | |
980 | objfile -> symtabs = symtab; | |
7d9884b9 JG |
981 | |
982 | #ifdef INIT_EXTRA_SYMTAB_INFO | |
30875e1c | 983 | INIT_EXTRA_SYMTAB_INFO (symtab); |
7d9884b9 | 984 | #endif |
d8ce1326 | 985 | |
30875e1c | 986 | return (symtab); |
d8ce1326 | 987 | } |
30875e1c SG |
988 | |
989 | struct partial_symtab * | |
990 | allocate_psymtab (filename, objfile) | |
991 | char *filename; | |
992 | struct objfile *objfile; | |
993 | { | |
994 | struct partial_symtab *psymtab; | |
995 | ||
cba0d141 JG |
996 | if (objfile -> free_psymtabs) |
997 | { | |
998 | psymtab = objfile -> free_psymtabs; | |
999 | objfile -> free_psymtabs = psymtab -> next; | |
1000 | } | |
1001 | else | |
1002 | psymtab = (struct partial_symtab *) | |
1003 | obstack_alloc (&objfile -> psymbol_obstack, | |
1004 | sizeof (struct partial_symtab)); | |
1005 | ||
30875e1c SG |
1006 | (void) memset (psymtab, 0, sizeof (struct partial_symtab)); |
1007 | psymtab -> filename = obsavestring (filename, strlen (filename), | |
1008 | &objfile -> psymbol_obstack); | |
1009 | psymtab -> symtab = NULL; | |
1010 | ||
1011 | /* Hook it to the objfile it comes from */ | |
1012 | ||
1013 | psymtab -> objfile = objfile; | |
1014 | psymtab -> next = objfile -> psymtabs; | |
1015 | objfile -> psymtabs = psymtab; | |
1016 | ||
1017 | return (psymtab); | |
1018 | } | |
1019 | ||
d8ce1326 | 1020 | \f |
9d199712 JG |
1021 | /* clear_symtab_users_once: |
1022 | ||
1023 | This function is run after symbol reading, or from a cleanup. | |
1024 | If an old symbol table was obsoleted, the old symbol table | |
1025 | has been blown away, but the other GDB data structures that may | |
1026 | reference it have not yet been cleared or re-directed. (The old | |
1027 | symtab was zapped, and the cleanup queued, in free_named_symtab() | |
1028 | below.) | |
1029 | ||
1030 | This function can be queued N times as a cleanup, or called | |
1031 | directly; it will do all the work the first time, and then will be a | |
1032 | no-op until the next time it is queued. This works by bumping a | |
1033 | counter at queueing time. Much later when the cleanup is run, or at | |
1034 | the end of symbol processing (in case the cleanup is discarded), if | |
1035 | the queued count is greater than the "done-count", we do the work | |
1036 | and set the done-count to the queued count. If the queued count is | |
1037 | less than or equal to the done-count, we just ignore the call. This | |
1038 | is needed because reading a single .o file will often replace many | |
1039 | symtabs (one per .h file, for example), and we don't want to reset | |
1040 | the breakpoints N times in the user's face. | |
1041 | ||
1042 | The reason we both queue a cleanup, and call it directly after symbol | |
1043 | reading, is because the cleanup protects us in case of errors, but is | |
1044 | discarded if symbol reading is successful. */ | |
1045 | ||
1046 | static int clear_symtab_users_queued; | |
1047 | static int clear_symtab_users_done; | |
1048 | ||
1049 | static void | |
1050 | clear_symtab_users_once () | |
1051 | { | |
1052 | /* Enforce once-per-`do_cleanups'-semantics */ | |
1053 | if (clear_symtab_users_queued <= clear_symtab_users_done) | |
1054 | return; | |
1055 | clear_symtab_users_done = clear_symtab_users_queued; | |
1056 | ||
1057 | printf ("Resetting debugger state after updating old symbol tables\n"); | |
1058 | ||
1059 | /* Someday, we should do better than this, by only blowing away | |
1060 | the things that really need to be blown. */ | |
1061 | clear_value_history (); | |
1062 | clear_displays (); | |
1063 | clear_internalvars (); | |
1064 | breakpoint_re_set (); | |
1065 | set_default_breakpoint (0, 0, 0, 0); | |
1066 | current_source_symtab = 0; | |
1067 | } | |
1068 | ||
1069 | /* Delete the specified psymtab, and any others that reference it. */ | |
1070 | ||
e1ce8aa5 | 1071 | static void |
9d199712 JG |
1072 | cashier_psymtab (pst) |
1073 | struct partial_symtab *pst; | |
1074 | { | |
1075 | struct partial_symtab *ps, *pprev; | |
1076 | int i; | |
1077 | ||
1078 | /* Find its previous psymtab in the chain */ | |
30875e1c | 1079 | for (ps = pst->objfile->psymtabs; ps; ps = ps->next) { |
9d199712 JG |
1080 | if (ps == pst) |
1081 | break; | |
1082 | pprev = ps; | |
1083 | } | |
1084 | ||
1085 | if (ps) { | |
1086 | /* Unhook it from the chain. */ | |
30875e1c SG |
1087 | if (ps == pst->objfile->psymtabs) |
1088 | pst->objfile->psymtabs = ps->next; | |
9d199712 JG |
1089 | else |
1090 | pprev->next = ps->next; | |
1091 | ||
1092 | /* FIXME, we can't conveniently deallocate the entries in the | |
1093 | partial_symbol lists (global_psymbols/static_psymbols) that | |
1094 | this psymtab points to. These just take up space until all | |
1095 | the psymtabs are reclaimed. Ditto the dependencies list and | |
1096 | filename, which are all in the psymbol_obstack. */ | |
1097 | ||
1098 | /* We need to cashier any psymtab that has this one as a dependency... */ | |
1099 | again: | |
30875e1c | 1100 | for (ps = pst->objfile->psymtabs; ps; ps = ps->next) { |
9d199712 JG |
1101 | for (i = 0; i < ps->number_of_dependencies; i++) { |
1102 | if (ps->dependencies[i] == pst) { | |
1103 | cashier_psymtab (ps); | |
1104 | goto again; /* Must restart, chain has been munged. */ | |
1105 | } | |
1106 | } | |
1107 | } | |
1108 | } | |
1109 | } | |
1110 | ||
1111 | /* If a symtab or psymtab for filename NAME is found, free it along | |
1112 | with any dependent breakpoints, displays, etc. | |
1113 | Used when loading new versions of object modules with the "add-file" | |
1114 | command. This is only called on the top-level symtab or psymtab's name; | |
1115 | it is not called for subsidiary files such as .h files. | |
1116 | ||
1117 | Return value is 1 if we blew away the environment, 0 if not. | |
30875e1c | 1118 | FIXME. The return valu appears to never be used. |
9d199712 JG |
1119 | |
1120 | FIXME. I think this is not the best way to do this. We should | |
1121 | work on being gentler to the environment while still cleaning up | |
1122 | all stray pointers into the freed symtab. */ | |
1123 | ||
1124 | int | |
1125 | free_named_symtabs (name) | |
1126 | char *name; | |
1127 | { | |
30875e1c SG |
1128 | #if 0 |
1129 | /* FIXME: With the new method of each objfile having it's own | |
1130 | psymtab list, this function needs serious rethinking. In particular, | |
1131 | why was it ever necessary to toss psymtabs with specific compilation | |
1132 | unit filenames, as opposed to all psymtabs from a particular symbol | |
ac88ca20 JG |
1133 | file? -- fnf |
1134 | Well, the answer is that some systems permit reloading of particular | |
1135 | compilation units. We want to blow away any old info about these | |
1136 | compilation units, regardless of which objfiles they arrived in. --gnu. */ | |
1137 | ||
1138 | register struct symtab *s; | |
1139 | register struct symtab *prev; | |
1140 | register struct partial_symtab *ps; | |
1141 | struct blockvector *bv; | |
1142 | int blewit = 0; | |
30875e1c | 1143 | |
61a7292f SG |
1144 | /* We only wack things if the symbol-reload switch is set. */ |
1145 | if (!symbol_reloading) | |
1146 | return 0; | |
1147 | ||
d11c44f1 JG |
1148 | /* Some symbol formats have trouble providing file names... */ |
1149 | if (name == 0 || *name == '\0') | |
1150 | return 0; | |
1151 | ||
9d199712 JG |
1152 | /* Look for a psymtab with the specified name. */ |
1153 | ||
1154 | again2: | |
1155 | for (ps = partial_symtab_list; ps; ps = ps->next) { | |
1156 | if (!strcmp (name, ps->filename)) { | |
1157 | cashier_psymtab (ps); /* Blow it away...and its little dog, too. */ | |
1158 | goto again2; /* Must restart, chain has been munged */ | |
1159 | } | |
1160 | } | |
1161 | ||
1162 | /* Look for a symtab with the specified name. */ | |
1163 | ||
1164 | for (s = symtab_list; s; s = s->next) | |
1165 | { | |
1166 | if (!strcmp (name, s->filename)) | |
1167 | break; | |
1168 | prev = s; | |
1169 | } | |
1170 | ||
1171 | if (s) | |
1172 | { | |
1173 | if (s == symtab_list) | |
1174 | symtab_list = s->next; | |
1175 | else | |
1176 | prev->next = s->next; | |
1177 | ||
1178 | /* For now, queue a delete for all breakpoints, displays, etc., whether | |
1179 | or not they depend on the symtab being freed. This should be | |
1180 | changed so that only those data structures affected are deleted. */ | |
1181 | ||
1182 | /* But don't delete anything if the symtab is empty. | |
1183 | This test is necessary due to a bug in "dbxread.c" that | |
1184 | causes empty symtabs to be created for N_SO symbols that | |
1185 | contain the pathname of the object file. (This problem | |
1186 | has been fixed in GDB 3.9x). */ | |
1187 | ||
c9bd6710 JG |
1188 | bv = BLOCKVECTOR (s); |
1189 | if (BLOCKVECTOR_NBLOCKS (bv) > 2 | |
9d199712 JG |
1190 | || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) |
1191 | || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK))) | |
1192 | { | |
1193 | complain (&oldsyms_complaint, name); | |
1194 | ||
1195 | clear_symtab_users_queued++; | |
1196 | make_cleanup (clear_symtab_users_once, 0); | |
1197 | blewit = 1; | |
1198 | } else { | |
1199 | complain (&empty_symtab_complaint, name); | |
1200 | } | |
1201 | ||
1202 | free_symtab (s); | |
1203 | } | |
1204 | else | |
d8ce1326 JG |
1205 | { |
1206 | /* It is still possible that some breakpoints will be affected | |
1207 | even though no symtab was found, since the file might have | |
1208 | been compiled without debugging, and hence not be associated | |
1209 | with a symtab. In order to handle this correctly, we would need | |
1210 | to keep a list of text address ranges for undebuggable files. | |
1211 | For now, we do nothing, since this is a fairly obscure case. */ | |
1212 | ; | |
1213 | } | |
9d199712 | 1214 | |
30875e1c | 1215 | /* FIXME, what about the minimal symbol table? */ |
9d199712 | 1216 | return blewit; |
30875e1c SG |
1217 | #else |
1218 | return (0); | |
1219 | #endif | |
9d199712 JG |
1220 | } |
1221 | \f | |
d4ea2aba PB |
1222 | /* Allocate and partially fill a partial symtab. It will be |
1223 | completely filled at the end of the symbol list. | |
1224 | ||
1225 | SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR | |
1226 | is the address relative to which its symbols are (incremental) or 0 | |
1227 | (normal). */ | |
1228 | ||
1229 | ||
1230 | struct partial_symtab * | |
1231 | start_psymtab_common (objfile, addr, | |
1232 | filename, textlow, global_syms, static_syms) | |
1233 | struct objfile *objfile; | |
1234 | CORE_ADDR addr; | |
1235 | char *filename; | |
1236 | CORE_ADDR textlow; | |
1237 | struct partial_symbol *global_syms; | |
1238 | struct partial_symbol *static_syms; | |
1239 | { | |
30875e1c SG |
1240 | struct partial_symtab *psymtab; |
1241 | ||
1242 | psymtab = allocate_psymtab (filename, objfile); | |
1243 | psymtab -> addr = addr; | |
1244 | psymtab -> textlow = textlow; | |
1245 | psymtab -> texthigh = psymtab -> textlow; /* default */ | |
1246 | psymtab -> globals_offset = global_syms - objfile -> global_psymbols.list; | |
1247 | psymtab -> statics_offset = static_syms - objfile -> static_psymbols.list; | |
1248 | return (psymtab); | |
7d9884b9 JG |
1249 | } |
1250 | ||
7d9884b9 | 1251 | \f |
bd5635a1 RP |
1252 | void |
1253 | _initialize_symfile () | |
1254 | { | |
1255 | ||
1256 | add_com ("symbol-file", class_files, symbol_file_command, | |
30875e1c | 1257 | "Load symbol table from executable file FILE.\n\ |
bd5635a1 RP |
1258 | The `file' command can also load symbol tables, as well as setting the file\n\ |
1259 | to execute."); | |
1260 | ||
e74d7b43 | 1261 | add_com ("add-symbol-file", class_files, add_symbol_file_command, |
bd5635a1 RP |
1262 | "Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\ |
1263 | The second argument provides the starting address of the file's text."); | |
1264 | ||
1265 | add_com ("load", class_files, load_command, | |
1266 | "Dynamically load FILE into the running program, and record its symbols\n\ | |
1267 | for access from GDB."); | |
1268 | ||
1269 | add_show_from_set | |
4369a140 | 1270 | (add_set_cmd ("complaints", class_support, var_zinteger, |
bd5635a1 RP |
1271 | (char *)&stop_whining, |
1272 | "Set max number of complaints about incorrect symbols.", | |
1273 | &setlist), | |
1274 | &showlist); | |
1275 | ||
61a7292f SG |
1276 | add_show_from_set |
1277 | (add_set_cmd ("symbol-reloading", class_support, var_boolean, | |
1278 | (char *)&symbol_reloading, | |
1279 | "Set dynamic symbol table reloading multiple times in one run.", | |
1280 | &setlist), | |
1281 | &showlist); | |
1282 | ||
bd5635a1 | 1283 | } |