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" | |
29 | #include "gdbcmd.h" | |
30 | #include "breakpoint.h" | |
31 | ||
32 | #include <obstack.h> | |
33 | #include <assert.h> | |
34 | ||
35 | #include <sys/types.h> | |
36 | #include <fcntl.h> | |
37 | #include <string.h> | |
38 | #include <sys/stat.h> | |
39 | ||
30875e1c SG |
40 | /* Global variables owned by this file */ |
41 | ||
d47d5315 | 42 | CORE_ADDR entry_point; /* Where execution starts in symfile */ |
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 | 48 | |
d47d5315 JG |
49 | extern CORE_ADDR startup_file_start; /* From blockframe.c */ |
50 | extern CORE_ADDR startup_file_end; /* From blockframe.c */ | |
51 | ||
bd5635a1 | 52 | /* Functions this file defines */ |
7d9884b9 | 53 | |
30875e1c SG |
54 | static void |
55 | load_command PARAMS ((char *, int)); | |
56 | ||
57 | static void | |
58 | add_symbol_file_command PARAMS ((char *, int)); | |
59 | ||
30875e1c SG |
60 | static void |
61 | cashier_psymtab PARAMS ((struct partial_symtab *)); | |
bd5635a1 | 62 | |
30875e1c SG |
63 | static int |
64 | compare_psymbols PARAMS ((const void *, const void *)); | |
bd5635a1 | 65 | |
30875e1c SG |
66 | static int |
67 | compare_symbols PARAMS ((const void *, const void *)); | |
68 | ||
b0246b3b FF |
69 | static bfd * |
70 | symfile_bfd_open PARAMS ((char *)); | |
30875e1c | 71 | |
80d68b1d FF |
72 | static void |
73 | find_sym_fns PARAMS ((struct objfile *)); | |
30875e1c SG |
74 | |
75 | static void | |
76 | clear_symtab_users_once PARAMS ((void)); | |
bd5635a1 | 77 | |
80d68b1d FF |
78 | /* List of all available sym_fns. On gdb startup, each object file reader |
79 | calls add_symtab_fns() to register information on each format it is | |
80 | prepared to read. */ | |
bd5635a1 | 81 | |
80d68b1d | 82 | static struct sym_fns *symtab_fns = NULL; |
bd5635a1 | 83 | |
30875e1c SG |
84 | /* When we need to allocate a new type, we need to know which type_obstack |
85 | to allocate the type on, since there is one for each objfile. The places | |
86 | where types are allocated are deeply buried in function call hierarchies | |
87 | which know nothing about objfiles, so rather than trying to pass a | |
88 | particular objfile down to them, we just do an end run around them and | |
89 | set current_objfile to be whatever objfile we expect to be using at the | |
90 | time types are being allocated. For instance, when we start reading | |
91 | symbols for a particular objfile, we set current_objfile to point to that | |
92 | objfile, and when we are done, we set it back to NULL, to ensure that we | |
93 | never put a type someplace other than where we are expecting to put it. | |
94 | FIXME: Maybe we should review the entire type handling system and | |
95 | see if there is a better way to avoid this problem. */ | |
96 | ||
97 | struct objfile *current_objfile = NULL; | |
bd5635a1 | 98 | |
7d9884b9 JG |
99 | /* The object file that the main symbol table was loaded from (e.g. the |
100 | argument to the "symbol-file" or "file" command). */ | |
bd5635a1 | 101 | |
30875e1c | 102 | struct objfile *symfile_objfile = NULL; |
bd5635a1 RP |
103 | |
104 | /* Structures with which to manage partial symbol allocation. */ | |
105 | ||
106 | struct psymbol_allocation_list global_psymbols = {0}, static_psymbols = {0}; | |
107 | ||
61a7292f SG |
108 | /* Flag for whether user will be reloading symbols multiple times. |
109 | Defaults to ON for VxWorks, otherwise OFF. */ | |
110 | ||
111 | #ifdef SYMBOL_RELOADING_DEFAULT | |
112 | int symbol_reloading = SYMBOL_RELOADING_DEFAULT; | |
113 | #else | |
114 | int symbol_reloading = 0; | |
115 | #endif | |
116 | ||
bd5635a1 RP |
117 | /* Structure to manage complaints about symbol file contents. */ |
118 | ||
119 | struct complaint complaint_root[1] = { | |
30875e1c | 120 | {(char *) 0, 0, complaint_root}, |
bd5635a1 RP |
121 | }; |
122 | ||
9d199712 JG |
123 | /* Some actual complaints. */ |
124 | ||
125 | struct complaint oldsyms_complaint = { | |
126 | "Replacing old symbols for `%s'", 0, 0 }; | |
127 | ||
128 | struct complaint empty_symtab_complaint = { | |
129 | "Empty symbol table found for `%s'", 0, 0 }; | |
130 | ||
bd5635a1 RP |
131 | \f |
132 | /* In the following sort, we always make sure that | |
133 | register debug symbol declarations always come before regular | |
134 | debug symbol declarations (as might happen when parameters are | |
30875e1c SG |
135 | then put into registers by the compiler). |
136 | ||
137 | Since this function is called from within qsort, in an ANSI environment | |
138 | it must conform to the prototype for qsort, which specifies that the | |
139 | comparison function takes two "void *" pointers. */ | |
bd5635a1 RP |
140 | |
141 | static int | |
30875e1c SG |
142 | compare_symbols (s1p, s2p) |
143 | const PTR s1p; | |
144 | const PTR s2p; | |
bd5635a1 | 145 | { |
30875e1c | 146 | register struct symbol **s1, **s2; |
bd5635a1 RP |
147 | register int namediff; |
148 | ||
30875e1c SG |
149 | s1 = (struct symbol **) s1p; |
150 | s2 = (struct symbol **) s2p; | |
151 | ||
bd5635a1 RP |
152 | /* Compare the initial characters. */ |
153 | namediff = SYMBOL_NAME (*s1)[0] - SYMBOL_NAME (*s2)[0]; | |
154 | if (namediff != 0) return namediff; | |
155 | ||
156 | /* If they match, compare the rest of the names. */ | |
157 | namediff = strcmp (SYMBOL_NAME (*s1), SYMBOL_NAME (*s2)); | |
158 | if (namediff != 0) return namediff; | |
159 | ||
160 | /* For symbols of the same name, registers should come first. */ | |
161 | return ((SYMBOL_CLASS (*s2) == LOC_REGISTER) | |
162 | - (SYMBOL_CLASS (*s1) == LOC_REGISTER)); | |
163 | } | |
164 | ||
30875e1c SG |
165 | /* |
166 | ||
167 | LOCAL FUNCTION | |
168 | ||
169 | compare_psymbols -- compare two partial symbols by name | |
170 | ||
171 | DESCRIPTION | |
172 | ||
173 | Given pointer to two partial symbol table entries, compare | |
174 | them by name and return -N, 0, or +N (ala strcmp). Typically | |
175 | used by sorting routines like qsort(). | |
176 | ||
177 | NOTES | |
178 | ||
179 | Does direct compare of first two characters before punting | |
180 | and passing to strcmp for longer compares. Note that the | |
181 | original version had a bug whereby two null strings or two | |
182 | identically named one character strings would return the | |
183 | comparison of memory following the null byte. | |
184 | ||
185 | */ | |
186 | ||
187 | static int | |
188 | compare_psymbols (s1p, s2p) | |
189 | const PTR s1p; | |
190 | const PTR s2p; | |
191 | { | |
192 | register char *st1 = SYMBOL_NAME ((struct partial_symbol *) s1p); | |
193 | register char *st2 = SYMBOL_NAME ((struct partial_symbol *) s2p); | |
194 | ||
195 | if ((st1[0] - st2[0]) || !st1[0]) | |
196 | { | |
197 | return (st1[0] - st2[0]); | |
198 | } | |
199 | else if ((st1[1] - st2[1]) || !st1[1]) | |
200 | { | |
201 | return (st1[1] - st2[1]); | |
202 | } | |
203 | else | |
204 | { | |
205 | return (strcmp (st1 + 2, st2 + 2)); | |
206 | } | |
207 | } | |
208 | ||
209 | void | |
210 | sort_pst_symbols (pst) | |
211 | struct partial_symtab *pst; | |
212 | { | |
213 | /* Sort the global list; don't sort the static list */ | |
214 | ||
215 | qsort (pst -> objfile -> global_psymbols.list + pst -> globals_offset, | |
216 | pst -> n_global_syms, sizeof (struct partial_symbol), | |
217 | compare_psymbols); | |
218 | } | |
219 | ||
bd5635a1 RP |
220 | /* Call sort_block_syms to sort alphabetically the symbols of one block. */ |
221 | ||
222 | void | |
223 | sort_block_syms (b) | |
224 | register struct block *b; | |
225 | { | |
226 | qsort (&BLOCK_SYM (b, 0), BLOCK_NSYMS (b), | |
227 | sizeof (struct symbol *), compare_symbols); | |
228 | } | |
229 | ||
230 | /* Call sort_symtab_syms to sort alphabetically | |
231 | the symbols of each block of one symtab. */ | |
232 | ||
233 | void | |
234 | sort_symtab_syms (s) | |
235 | register struct symtab *s; | |
236 | { | |
c9bd6710 JG |
237 | register struct blockvector *bv; |
238 | int nbl; | |
bd5635a1 RP |
239 | int i; |
240 | register struct block *b; | |
241 | ||
c9bd6710 JG |
242 | if (s == 0) |
243 | return; | |
244 | bv = BLOCKVECTOR (s); | |
245 | nbl = BLOCKVECTOR_NBLOCKS (bv); | |
bd5635a1 RP |
246 | for (i = 0; i < nbl; i++) |
247 | { | |
248 | b = BLOCKVECTOR_BLOCK (bv, i); | |
249 | if (BLOCK_SHOULD_SORT (b)) | |
250 | sort_block_syms (b); | |
251 | } | |
252 | } | |
253 | ||
254 | void | |
255 | sort_all_symtab_syms () | |
256 | { | |
257 | register struct symtab *s; | |
30875e1c | 258 | register struct objfile *objfile; |
bd5635a1 | 259 | |
30875e1c | 260 | for (objfile = object_files; objfile != NULL; objfile = objfile -> next) |
bd5635a1 | 261 | { |
30875e1c SG |
262 | for (s = objfile -> symtabs; s != NULL; s = s -> next) |
263 | { | |
264 | sort_symtab_syms (s); | |
265 | } | |
bd5635a1 RP |
266 | } |
267 | } | |
268 | ||
269 | /* Make a copy of the string at PTR with SIZE characters in the symbol obstack | |
270 | (and add a null character at the end in the copy). | |
271 | Returns the address of the copy. */ | |
272 | ||
273 | char * | |
30875e1c | 274 | obsavestring (ptr, size, obstackp) |
bd5635a1 RP |
275 | char *ptr; |
276 | int size; | |
30875e1c | 277 | struct obstack *obstackp; |
bd5635a1 | 278 | { |
30875e1c | 279 | register char *p = (char *) obstack_alloc (obstackp, size + 1); |
bd5635a1 RP |
280 | /* Open-coded bcopy--saves function call time. |
281 | These strings are usually short. */ | |
282 | { | |
283 | register char *p1 = ptr; | |
284 | register char *p2 = p; | |
285 | char *end = ptr + size; | |
286 | while (p1 != end) | |
287 | *p2++ = *p1++; | |
288 | } | |
289 | p[size] = 0; | |
290 | return p; | |
291 | } | |
292 | ||
293 | /* Concatenate strings S1, S2 and S3; return the new string. | |
294 | Space is found in the symbol_obstack. */ | |
295 | ||
296 | char * | |
30875e1c SG |
297 | obconcat (obstackp, s1, s2, s3) |
298 | struct obstack *obstackp; | |
299 | const char *s1, *s2, *s3; | |
bd5635a1 RP |
300 | { |
301 | register int len = strlen (s1) + strlen (s2) + strlen (s3) + 1; | |
30875e1c | 302 | register char *val = (char *) obstack_alloc (obstackp, len); |
bd5635a1 RP |
303 | strcpy (val, s1); |
304 | strcat (val, s2); | |
305 | strcat (val, s3); | |
306 | return val; | |
307 | } | |
bd5635a1 RP |
308 | |
309 | /* Get the symbol table that corresponds to a partial_symtab. | |
310 | This is fast after the first time you do it. In fact, there | |
311 | is an even faster macro PSYMTAB_TO_SYMTAB that does the fast | |
312 | case inline. */ | |
313 | ||
314 | struct symtab * | |
315 | psymtab_to_symtab (pst) | |
316 | register struct partial_symtab *pst; | |
317 | { | |
bd5635a1 RP |
318 | /* If it's been looked up before, return it. */ |
319 | if (pst->symtab) | |
320 | return pst->symtab; | |
321 | ||
322 | /* If it has not yet been read in, read it. */ | |
323 | if (!pst->readin) | |
324 | { | |
325 | (*pst->read_symtab) (pst); | |
326 | } | |
327 | ||
61a7292f | 328 | return pst->symtab; |
bd5635a1 RP |
329 | } |
330 | ||
331 | /* Process a symbol file, as either the main file or as a dynamically | |
332 | loaded file. | |
333 | ||
b3fdaf3d JK |
334 | NAME is the file name (which will be tilde-expanded and made |
335 | absolute herein) (but we don't free or modify NAME itself). | |
336 | FROM_TTY says how verbose to be. MAINLINE specifies whether this | |
337 | is the main symbol file, or whether it's an extra symbol file such | |
338 | as dynamically loaded code. If !mainline, ADDR is the address | |
4369a140 JG |
339 | where the text segment was loaded. If VERBO, the caller has printed |
340 | a verbose message about the symbol reading (and complaints can be | |
341 | more terse about it). */ | |
bd5635a1 RP |
342 | |
343 | void | |
4369a140 | 344 | syms_from_objfile (objfile, addr, mainline, verbo) |
7d9884b9 | 345 | struct objfile *objfile; |
bd5635a1 RP |
346 | CORE_ADDR addr; |
347 | int mainline; | |
4369a140 | 348 | int verbo; |
bd5635a1 | 349 | { |
bd5635a1 | 350 | asection *text_sect; |
bd5635a1 | 351 | |
bd5635a1 RP |
352 | /* There is a distinction between having no symbol table |
353 | (we refuse to read the file, leaving the old set of symbols around) | |
354 | and having no debugging symbols in your symbol table (we read | |
355 | the file and end up with a mostly empty symbol table). */ | |
356 | ||
b0246b3b | 357 | if (!(bfd_get_file_flags (objfile -> obfd) & HAS_SYMS)) |
d47d5315 JG |
358 | return; |
359 | ||
360 | /* Save startup file's range of PC addresses to help blockframe.c | |
361 | decide where the bottom of the stack is. */ | |
80d68b1d | 362 | |
b0246b3b | 363 | if (bfd_get_file_flags (objfile -> obfd) & EXEC_P) |
bd5635a1 | 364 | { |
d47d5315 JG |
365 | /* Executable file -- record its entry point so we'll recognize |
366 | the startup file because it contains the entry point. */ | |
b0246b3b | 367 | entry_point = bfd_get_start_address (objfile -> obfd); |
bd5635a1 | 368 | } |
d47d5315 | 369 | else |
bd5635a1 | 370 | { |
d47d5315 JG |
371 | /* Examination of non-executable.o files. Short-circuit this stuff. */ |
372 | /* ~0 will not be in any file, we hope. */ | |
373 | entry_point = ~0; | |
374 | /* set the startup file to be an empty range. */ | |
375 | startup_file_start = 0; | |
376 | startup_file_end = 0; | |
bd5635a1 RP |
377 | } |
378 | ||
80d68b1d | 379 | find_sym_fns (objfile); |
bd5635a1 RP |
380 | |
381 | if (mainline) | |
382 | { | |
383 | /* Since no error yet, throw away the old symbol table. */ | |
384 | ||
80d68b1d FF |
385 | if (symfile_objfile != NULL) |
386 | { | |
387 | free_objfile (symfile_objfile); | |
388 | symfile_objfile = NULL; | |
389 | } | |
bd5635a1 | 390 | |
80d68b1d | 391 | (*objfile -> sf -> sym_new_init) (objfile); |
bd5635a1 RP |
392 | |
393 | /* For mainline, caller didn't know the specified address of the | |
394 | text section. We fix that here. */ | |
80d68b1d | 395 | |
b0246b3b FF |
396 | text_sect = bfd_get_section_by_name (objfile -> obfd, ".text"); |
397 | addr = bfd_section_vma (objfile -> obfd, text_sect); | |
bd5635a1 RP |
398 | } |
399 | ||
80d68b1d FF |
400 | /* Initialize symbol reading routines for this objfile, allow complaints to |
401 | appear for this new file, and record how verbose to be, then do the | |
402 | initial symbol reading for this file. */ | |
4369a140 | 403 | |
80d68b1d FF |
404 | (*objfile -> sf -> sym_init) (objfile); |
405 | clear_complaints (1, verbo); | |
406 | (*objfile -> sf -> sym_read) (objfile, addr, mainline); | |
bd5635a1 RP |
407 | |
408 | /* Don't allow char * to have a typename (else would get caddr_t.) */ | |
409 | /* Ditto void *. FIXME should do this for all the builtin types. */ | |
410 | ||
411 | TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0; | |
412 | TYPE_NAME (lookup_pointer_type (builtin_type_void)) = 0; | |
413 | ||
414 | if (mainline) | |
415 | { | |
416 | /* OK, make it the "real" symbol file. */ | |
7d9884b9 | 417 | symfile_objfile = objfile; |
bd5635a1 RP |
418 | } |
419 | ||
0ef6f019 JG |
420 | /* If we have wiped out any old symbol tables, clean up. */ |
421 | clear_symtab_users_once (); | |
4369a140 JG |
422 | |
423 | /* We're done reading the symbol file; finish off complaints. */ | |
80d68b1d | 424 | clear_complaints (0, verbo); |
30875e1c | 425 | |
318bf84f FF |
426 | /* Fixup all the breakpoints that may have been redefined by this |
427 | symbol file. */ | |
30875e1c | 428 | |
318bf84f | 429 | breakpoint_re_set (); |
30875e1c | 430 | } |
d47d5315 JG |
431 | |
432 | /* Process a symbol file, as either the main file or as a dynamically | |
433 | loaded file. | |
434 | ||
435 | NAME is the file name (which will be tilde-expanded and made | |
436 | absolute herein) (but we don't free or modify NAME itself). | |
437 | FROM_TTY says how verbose to be. MAINLINE specifies whether this | |
438 | is the main symbol file, or whether it's an extra symbol file such | |
439 | as dynamically loaded code. If !mainline, ADDR is the address | |
30875e1c | 440 | where the text segment was loaded. |
d47d5315 | 441 | |
30875e1c SG |
442 | Upon success, returns a pointer to the objfile that was added. |
443 | Upon failure, jumps back to command level (never returns). */ | |
444 | ||
445 | struct objfile * | |
b0246b3b | 446 | symbol_file_add (name, from_tty, addr, mainline, mapped, readnow) |
d47d5315 JG |
447 | char *name; |
448 | int from_tty; | |
449 | CORE_ADDR addr; | |
450 | int mainline; | |
318bf84f | 451 | int mapped; |
b0246b3b | 452 | int readnow; |
d47d5315 | 453 | { |
7d9884b9 | 454 | struct objfile *objfile; |
b0246b3b | 455 | struct partial_symtab *psymtab; |
80d68b1d FF |
456 | bfd *abfd; |
457 | int mapped_it; | |
d47d5315 | 458 | |
80d68b1d FF |
459 | /* Open a bfd for the file and then check to see if the file has a |
460 | symbol table. There is a distinction between having no symbol table | |
d47d5315 | 461 | (we refuse to read the file, leaving the old set of symbols around) |
80d68b1d FF |
462 | and having no debugging symbols in the symbol table (we read the file |
463 | and end up with a mostly empty symbol table, but with lots of stuff in | |
464 | the minimal symbol table). We need to make the decision about whether | |
465 | to continue with the file before allocating and building a objfile. | |
466 | ||
467 | FIXME: This strategy works correctly when the debugging symbols are | |
468 | intermixed with "normal" symbols. However, when the debugging symbols | |
469 | are separate, such as with ELF/DWARF, it is perfectly plausible for | |
470 | the symbol table to be missing but still have all the DWARF info | |
471 | intact. Thus in general it is wrong to assume that having no symbol | |
472 | table implies no debugging information. */ | |
473 | ||
474 | abfd = symfile_bfd_open (name); | |
475 | if (!(bfd_get_file_flags (abfd) & HAS_SYMS)) | |
d47d5315 JG |
476 | { |
477 | error ("%s has no symbol-table", name); | |
478 | } | |
479 | ||
80d68b1d FF |
480 | if ((have_full_symbols () || have_partial_symbols ()) |
481 | && mainline | |
482 | && from_tty | |
483 | && !query ("Load new symbol table from \"%s\"? ", name)) | |
484 | error ("Not confirmed."); | |
485 | ||
486 | objfile = allocate_objfile (abfd, mapped); | |
487 | ||
318bf84f FF |
488 | /* If the objfile uses a mapped symbol file, and we have a psymtab for |
489 | it, then skip reading any symbols at this time. */ | |
d47d5315 | 490 | |
80d68b1d | 491 | if ((objfile -> flags & OBJF_MAPPED) && (objfile -> psymtabs != NULL)) |
d47d5315 | 492 | { |
80d68b1d FF |
493 | /* We mapped in an existing symbol table file that already has had |
494 | the psymbols read in. So we can skip that part. Notify the user | |
495 | that instead of reading the symbols, they have been mapped. */ | |
318bf84f FF |
496 | if (from_tty || info_verbose) |
497 | { | |
80d68b1d FF |
498 | printf_filtered ("Mapped symbols for %s...", name); |
499 | wrap_here (""); | |
318bf84f FF |
500 | fflush (stdout); |
501 | } | |
d47d5315 | 502 | } |
318bf84f | 503 | else |
bd5635a1 | 504 | { |
80d68b1d FF |
505 | /* We either created a new mapped symbol table, mapped an existing |
506 | symbol table file with no partial symbols, or need to read an | |
507 | unmapped symbol table. */ | |
318bf84f FF |
508 | if (from_tty || info_verbose) |
509 | { | |
510 | printf_filtered ("Reading symbols from %s...", name); | |
511 | wrap_here (""); | |
512 | fflush (stdout); | |
513 | } | |
318bf84f | 514 | syms_from_objfile (objfile, addr, mainline, from_tty); |
80d68b1d FF |
515 | } |
516 | ||
517 | /* We now have at least a partial symbol table. Check to see if the | |
518 | user requested that all symbols be read on initial access via either | |
519 | the gdb startup command line or on a per symbol file basis. Expand | |
520 | all partial symbol tables for this objfile if so. */ | |
b0246b3b | 521 | |
80d68b1d FF |
522 | readnow |= readnow_symbol_files; |
523 | if (readnow) | |
524 | { | |
318bf84f FF |
525 | if (from_tty || info_verbose) |
526 | { | |
80d68b1d FF |
527 | printf_filtered ("expanding to full symbols..."); |
528 | wrap_here (""); | |
318bf84f FF |
529 | fflush (stdout); |
530 | } | |
80d68b1d FF |
531 | |
532 | for (psymtab = objfile -> psymtabs; | |
533 | psymtab != NULL; | |
534 | psymtab = psymtab -> next) | |
535 | { | |
536 | (void) psymtab_to_symtab (psymtab); | |
537 | } | |
538 | } | |
539 | ||
540 | if (from_tty || info_verbose) | |
541 | { | |
542 | printf_filtered ("done.\n"); | |
543 | fflush (stdout); | |
bd5635a1 | 544 | } |
80d68b1d | 545 | |
30875e1c | 546 | return (objfile); |
bd5635a1 RP |
547 | } |
548 | ||
549 | /* This is the symbol-file command. Read the file, analyze its symbols, | |
30875e1c | 550 | and add a struct symtab to a symtab list. */ |
bd5635a1 RP |
551 | |
552 | void | |
30875e1c SG |
553 | symbol_file_command (args, from_tty) |
554 | char *args; | |
bd5635a1 RP |
555 | int from_tty; |
556 | { | |
30875e1c | 557 | char **argv; |
b0246b3b | 558 | char *name = NULL; |
30875e1c SG |
559 | struct cleanup *cleanups; |
560 | struct objfile *objfile; | |
318bf84f | 561 | int mapped = 0; |
30875e1c | 562 | int readnow = 0; |
bd5635a1 RP |
563 | |
564 | dont_repeat (); | |
565 | ||
30875e1c | 566 | if (args == NULL) |
bd5635a1 | 567 | { |
cba0d141 JG |
568 | if ((have_full_symbols () || have_partial_symbols ()) |
569 | && from_tty | |
570 | && !query ("Discard symbol table from `%s'? ", | |
571 | symfile_objfile -> name)) | |
572 | error ("Not confirmed."); | |
573 | free_all_objfiles (); | |
30875e1c | 574 | symfile_objfile = NULL; |
bd5635a1 | 575 | } |
30875e1c SG |
576 | else |
577 | { | |
578 | if ((argv = buildargv (args)) == NULL) | |
579 | { | |
318bf84f | 580 | nomem (0); |
30875e1c SG |
581 | } |
582 | cleanups = make_cleanup (freeargv, (char *) argv); | |
b0246b3b | 583 | while (*argv != NULL) |
30875e1c | 584 | { |
b0246b3b | 585 | if (strcmp (*argv, "-mapped") == 0) |
30875e1c | 586 | { |
318bf84f | 587 | mapped = 1; |
30875e1c | 588 | } |
b0246b3b | 589 | else if (strcmp (*argv, "-readnow") == 0) |
30875e1c SG |
590 | { |
591 | readnow = 1; | |
592 | } | |
b0246b3b FF |
593 | else if (**argv == '-') |
594 | { | |
595 | error ("unknown option `%s'", *argv); | |
596 | } | |
597 | else | |
598 | { | |
599 | name = *argv; | |
600 | } | |
601 | argv++; | |
30875e1c | 602 | } |
2403f49b | 603 | |
b0246b3b FF |
604 | if (name == NULL) |
605 | { | |
606 | error ("no symbol file name was specified"); | |
607 | } | |
608 | else | |
30875e1c | 609 | { |
318bf84f FF |
610 | /* Getting new symbols may change our opinion about what is |
611 | frameless. */ | |
612 | reinit_frame_cache (); | |
613 | objfile = symbol_file_add (name, from_tty, (CORE_ADDR)0, 1, | |
b0246b3b | 614 | mapped, readnow); |
30875e1c SG |
615 | } |
616 | do_cleanups (cleanups); | |
617 | } | |
bd5635a1 RP |
618 | } |
619 | ||
b0246b3b FF |
620 | /* Open file specified by NAME and hand it off to BFD for preliminary |
621 | analysis. Result is a newly initialized bfd *, which includes a newly | |
622 | malloc'd` copy of NAME (tilde-expanded and made absolute). | |
7d9884b9 | 623 | In case of trouble, error() is called. */ |
bd5635a1 | 624 | |
b0246b3b FF |
625 | static bfd * |
626 | symfile_bfd_open (name) | |
bd5635a1 RP |
627 | char *name; |
628 | { | |
629 | bfd *sym_bfd; | |
630 | int desc; | |
631 | char *absolute_name; | |
632 | ||
7d9884b9 | 633 | name = tilde_expand (name); /* Returns 1st new malloc'd copy */ |
bd5635a1 | 634 | |
7d9884b9 | 635 | /* Look down path for it, allocate 2nd new malloc'd copy. */ |
bd5635a1 | 636 | desc = openp (getenv ("PATH"), 1, name, O_RDONLY, 0, &absolute_name); |
b0246b3b FF |
637 | if (desc < 0) |
638 | { | |
639 | make_cleanup (free, name); | |
640 | perror_with_name (name); | |
641 | } | |
7d9884b9 | 642 | free (name); /* Free 1st new malloc'd copy */ |
30875e1c | 643 | name = absolute_name; /* Keep 2nd malloc'd copy in bfd */ |
bd5635a1 RP |
644 | |
645 | sym_bfd = bfd_fdopenr (name, NULL, desc); | |
646 | if (!sym_bfd) | |
647 | { | |
648 | close (desc); | |
7d9884b9 | 649 | make_cleanup (free, name); |
b0246b3b FF |
650 | error ("\"%s\": can't open to read symbols: %s.", name, |
651 | bfd_errmsg (bfd_error)); | |
bd5635a1 | 652 | } |
bd5635a1 | 653 | |
b0246b3b FF |
654 | if (!bfd_check_format (sym_bfd, bfd_object)) |
655 | { | |
656 | bfd_close (sym_bfd); /* This also closes desc */ | |
657 | make_cleanup (free, name); | |
658 | error ("\"%s\": can't read symbols: %s.", name, | |
659 | bfd_errmsg (bfd_error)); | |
660 | } | |
7d9884b9 | 661 | |
b0246b3b | 662 | return (sym_bfd); |
7d9884b9 JG |
663 | } |
664 | ||
80d68b1d FF |
665 | /* Link a new symtab_fns into the global symtab_fns list. Called on gdb |
666 | startup by the _initialize routine in each object file format reader, | |
667 | to register information about each format the the reader is prepared | |
668 | to handle. */ | |
bd5635a1 RP |
669 | |
670 | void | |
671 | add_symtab_fns (sf) | |
672 | struct sym_fns *sf; | |
673 | { | |
674 | sf->next = symtab_fns; | |
675 | symtab_fns = sf; | |
676 | } | |
677 | ||
678 | ||
679 | /* Initialize to read symbols from the symbol file sym_bfd. It either | |
80d68b1d FF |
680 | returns or calls error(). The result is an initialized struct sym_fns |
681 | in the objfile structure, that contains cached information about the | |
682 | symbol file. */ | |
bd5635a1 | 683 | |
80d68b1d FF |
684 | static void |
685 | find_sym_fns (objfile) | |
7d9884b9 | 686 | struct objfile *objfile; |
bd5635a1 RP |
687 | { |
688 | struct sym_fns *sf, *sf2; | |
689 | ||
80d68b1d | 690 | for (sf = symtab_fns; sf != NULL; sf = sf -> next) |
bd5635a1 | 691 | { |
80d68b1d FF |
692 | if (strncmp (bfd_get_target (objfile -> obfd), |
693 | sf -> sym_name, sf -> sym_namelen) == 0) | |
bd5635a1 | 694 | { |
80d68b1d FF |
695 | objfile -> sf = sf; |
696 | return; | |
bd5635a1 RP |
697 | } |
698 | } | |
c9bd6710 | 699 | error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.", |
b0246b3b | 700 | bfd_get_target (objfile -> obfd)); |
bd5635a1 RP |
701 | } |
702 | \f | |
703 | /* This function runs the load command of our current target. */ | |
704 | ||
30875e1c | 705 | static void |
bd5635a1 RP |
706 | load_command (arg, from_tty) |
707 | char *arg; | |
708 | int from_tty; | |
709 | { | |
710 | target_load (arg, from_tty); | |
711 | } | |
712 | ||
61a7292f SG |
713 | /* This function allows the addition of incrementally linked object files. |
714 | It does not modify any state in the target, only in the debugger. */ | |
bd5635a1 | 715 | |
e1ce8aa5 | 716 | /* ARGSUSED */ |
30875e1c | 717 | static void |
b0246b3b FF |
718 | add_symbol_file_command (args, from_tty) |
719 | char *args; | |
bd5635a1 RP |
720 | int from_tty; |
721 | { | |
b0246b3b | 722 | char *name = NULL; |
bd5635a1 | 723 | CORE_ADDR text_addr; |
b0246b3b FF |
724 | char *arg; |
725 | int readnow; | |
726 | int mapped; | |
bd5635a1 | 727 | |
b0246b3b | 728 | dont_repeat (); |
61a7292f | 729 | |
b0246b3b FF |
730 | if (args == NULL) |
731 | { | |
732 | error ("add-symbol-file takes a file name and an address"); | |
733 | } | |
bd5635a1 | 734 | |
b0246b3b | 735 | /* Make a copy of the string that we can safely write into. */ |
bd5635a1 | 736 | |
b0246b3b FF |
737 | args = strdup (args); |
738 | make_cleanup (free, args); | |
739 | ||
740 | /* Pick off any -option args and the file name. */ | |
741 | ||
742 | while ((*args != '\000') && (name == NULL)) | |
743 | { | |
744 | while (isspace (*args)) {args++;} | |
745 | arg = args; | |
746 | while ((*args != '\000') && !isspace (*args)) {args++;} | |
747 | if (*args != '\000') | |
748 | { | |
749 | *args++ = '\000'; | |
750 | } | |
751 | if (*arg != '-') | |
752 | { | |
753 | name = arg; | |
754 | } | |
755 | else if (strcmp (arg, "-mapped") == 0) | |
756 | { | |
757 | mapped = 1; | |
758 | } | |
759 | else if (strcmp (arg, "-readnow") == 0) | |
760 | { | |
761 | readnow = 1; | |
762 | } | |
763 | else | |
764 | { | |
765 | error ("unknown option `%s'", arg); | |
766 | } | |
767 | } | |
bd5635a1 | 768 | |
b0246b3b FF |
769 | /* After picking off any options and the file name, args should be |
770 | left pointing at the remainder of the command line, which should | |
771 | be the address expression to evaluate. */ | |
bd5635a1 | 772 | |
b0246b3b FF |
773 | if ((name == NULL) || (*args == '\000') ) |
774 | { | |
775 | error ("add-symbol-file takes a file name and an address"); | |
776 | } | |
777 | name = tilde_expand (name); | |
778 | make_cleanup (free, name); | |
bd5635a1 | 779 | |
b0246b3b | 780 | text_addr = parse_and_eval_address (args); |
bd5635a1 | 781 | |
d8ce1326 JG |
782 | if (!query ("add symbol table from file \"%s\" at text_addr = %s?\n", |
783 | name, local_hex_string (text_addr))) | |
bd5635a1 RP |
784 | error ("Not confirmed."); |
785 | ||
b0246b3b FF |
786 | /* Getting new symbols may change our opinion about what is |
787 | frameless. */ | |
788 | ||
789 | reinit_frame_cache (); | |
790 | ||
791 | (void) symbol_file_add (name, 0, text_addr, 0, mapped, readnow); | |
bd5635a1 RP |
792 | } |
793 | \f | |
7d9884b9 | 794 | /* Re-read symbols if a symbol-file has changed. */ |
bd5635a1 RP |
795 | void |
796 | reread_symbols () | |
797 | { | |
7d9884b9 JG |
798 | struct objfile *objfile; |
799 | long new_modtime; | |
800 | int reread_one = 0; | |
cba0d141 JG |
801 | struct stat new_statbuf; |
802 | int res; | |
bd5635a1 RP |
803 | |
804 | /* With the addition of shared libraries, this should be modified, | |
805 | the load time should be saved in the partial symbol tables, since | |
806 | different tables may come from different source files. FIXME. | |
807 | This routine should then walk down each partial symbol table | |
30875e1c | 808 | and see if the symbol table that it originates from has been changed */ |
bd5635a1 | 809 | |
30875e1c | 810 | the_big_top: |
7d9884b9 JG |
811 | for (objfile = object_files; objfile; objfile = objfile->next) { |
812 | if (objfile->obfd) { | |
318bf84f FF |
813 | #ifdef IBM6000 |
814 | /* If this object is from a shared library, then you should | |
815 | stat on the library name, not member name. */ | |
816 | ||
817 | if (objfile->obfd->my_archive) | |
818 | res = stat (objfile->obfd->my_archive->filename, &new_statbuf); | |
819 | else | |
820 | #endif | |
cba0d141 JG |
821 | res = stat (objfile->name, &new_statbuf); |
822 | if (res != 0) { | |
823 | /* FIXME, should use print_sys_errmsg but it's not filtered. */ | |
824 | printf_filtered ("`%s' has disappeared; keeping its symbols.\n", | |
825 | objfile->name); | |
826 | continue; | |
827 | } | |
828 | new_modtime = new_statbuf.st_mtime; | |
7d9884b9 JG |
829 | if (new_modtime != objfile->mtime) { |
830 | printf_filtered ("`%s' has changed; re-reading symbols.\n", | |
831 | objfile->name); | |
832 | /* FIXME, this should use a different command...that would only | |
30875e1c SG |
833 | affect this objfile's symbols, and would reset objfile->mtime. |
834 | (objfile->mtime = new_modtime;) | |
835 | HOWEVER, that command isn't written yet -- so call symbol_file_ | |
836 | command, and restart the scan from the top, because it munges | |
837 | the object_files list. */ | |
7d9884b9 | 838 | symbol_file_command (objfile->name, 0); |
7d9884b9 | 839 | reread_one = 1; |
30875e1c | 840 | goto the_big_top; /* Start over. */ |
7d9884b9 | 841 | } |
bd5635a1 | 842 | } |
7d9884b9 JG |
843 | } |
844 | ||
845 | if (reread_one) | |
846 | breakpoint_re_set (); | |
bd5635a1 | 847 | } |
bd5635a1 RP |
848 | \f |
849 | /* Functions to handle complaints during symbol reading. */ | |
850 | ||
851 | /* How many complaints about a particular thing should be printed before | |
61a7292f SG |
852 | we stop whining about it? Default is no whining at all, since so many |
853 | systems have ill-constructed symbol files. */ | |
bd5635a1 | 854 | |
61a7292f | 855 | static unsigned stop_whining = 0; |
bd5635a1 | 856 | |
4369a140 JG |
857 | /* Should each complaint be self explanatory, or should we assume that |
858 | a series of complaints is being produced? | |
859 | case 0: self explanatory message. | |
860 | case 1: First message of a series that must start off with explanation. | |
861 | case 2: Subsequent message, when user already knows we are reading | |
862 | symbols and we can just state our piece. */ | |
863 | ||
864 | static int complaint_series = 0; | |
865 | ||
bd5635a1 | 866 | /* Print a complaint about the input symbols, and link the complaint block |
7d9884b9 | 867 | into a chain for later handling. */ |
bd5635a1 | 868 | |
7d9884b9 | 869 | void |
bd5635a1 RP |
870 | complain (complaint, val) |
871 | struct complaint *complaint; | |
872 | char *val; | |
873 | { | |
874 | complaint->counter++; | |
875 | if (complaint->next == 0) { | |
876 | complaint->next = complaint_root->next; | |
877 | complaint_root->next = complaint; | |
878 | } | |
879 | if (complaint->counter > stop_whining) | |
7d9884b9 | 880 | return; |
bd5635a1 | 881 | wrap_here (""); |
4369a140 JG |
882 | |
883 | switch (complaint_series + (info_verbose << 1)) { | |
884 | ||
885 | /* Isolated messages, must be self-explanatory. */ | |
886 | case 0: | |
887 | puts_filtered ("During symbol reading, "); | |
888 | wrap_here(""); | |
889 | printf_filtered (complaint->message, val); | |
890 | puts_filtered (".\n"); | |
891 | break; | |
892 | ||
893 | /* First of a series, without `set verbose'. */ | |
894 | case 1: | |
bd5635a1 | 895 | puts_filtered ("During symbol reading..."); |
4369a140 JG |
896 | printf_filtered (complaint->message, val); |
897 | puts_filtered ("..."); | |
898 | wrap_here(""); | |
899 | complaint_series++; | |
900 | break; | |
901 | ||
902 | /* Subsequent messages of a series, or messages under `set verbose'. | |
903 | (We'll already have produced a "Reading in symbols for XXX..." message | |
904 | and will clean up at the end with a newline.) */ | |
905 | default: | |
906 | printf_filtered (complaint->message, val); | |
907 | puts_filtered ("..."); | |
908 | wrap_here(""); | |
bd5635a1 | 909 | } |
bd5635a1 RP |
910 | } |
911 | ||
4369a140 JG |
912 | /* Clear out all complaint counters that have ever been incremented. |
913 | If sym_reading is 1, be less verbose about successive complaints, | |
914 | since the messages are appearing all together during a command that | |
915 | reads symbols (rather than scattered around as psymtabs get fleshed | |
916 | out into symtabs at random times). If noisy is 1, we are in a | |
917 | noisy symbol reading command, and our caller will print enough | |
918 | context for the user to figure it out. */ | |
bd5635a1 RP |
919 | |
920 | void | |
4369a140 JG |
921 | clear_complaints (sym_reading, noisy) |
922 | int sym_reading; | |
923 | int noisy; | |
bd5635a1 RP |
924 | { |
925 | struct complaint *p; | |
926 | ||
927 | for (p = complaint_root->next; p != complaint_root; p = p->next) | |
928 | p->counter = 0; | |
4369a140 JG |
929 | |
930 | if (!sym_reading && !noisy && complaint_series > 1) { | |
931 | /* Terminate previous series, since caller won't. */ | |
932 | puts_filtered ("\n"); | |
933 | } | |
934 | ||
935 | complaint_series = sym_reading? 1 + noisy: 0; | |
bd5635a1 RP |
936 | } |
937 | \f | |
7d9884b9 JG |
938 | enum language |
939 | deduce_language_from_filename (filename) | |
940 | char *filename; | |
941 | { | |
30875e1c | 942 | char *c = strrchr (filename, '.'); |
7d9884b9 JG |
943 | |
944 | if (!c) ; /* Get default. */ | |
945 | else if(!strcmp(c,".mod")) | |
946 | return language_m2; | |
947 | else if(!strcmp(c,".c")) | |
948 | return language_c; | |
949 | else if(!strcmp(c,".cc") || !strcmp(c,".C")) | |
950 | return language_cplus; | |
951 | ||
952 | return language_unknown; /* default */ | |
953 | } | |
954 | \f | |
d8ce1326 JG |
955 | /* allocate_symtab: |
956 | ||
957 | Allocate and partly initialize a new symbol table. Return a pointer | |
958 | to it. error() if no space. | |
959 | ||
960 | Caller must set these fields: | |
961 | LINETABLE(symtab) | |
962 | symtab->blockvector | |
d8ce1326 JG |
963 | symtab->dirname |
964 | symtab->free_code | |
965 | symtab->free_ptr | |
966 | initialize any EXTRA_SYMTAB_INFO | |
967 | possibly free_named_symtabs (symtab->filename); | |
d8ce1326 JG |
968 | */ |
969 | ||
970 | struct symtab * | |
30875e1c SG |
971 | allocate_symtab (filename, objfile) |
972 | char *filename; | |
973 | struct objfile *objfile; | |
d8ce1326 JG |
974 | { |
975 | register struct symtab *symtab; | |
d8ce1326 | 976 | |
30875e1c SG |
977 | symtab = (struct symtab *) |
978 | obstack_alloc (&objfile -> symbol_obstack, sizeof (struct symtab)); | |
979 | (void) memset (symtab, 0, sizeof (*symtab)); | |
980 | symtab -> filename = obsavestring (filename, strlen (filename), | |
981 | &objfile -> symbol_obstack); | |
982 | symtab -> fullname = NULL; | |
983 | symtab -> language = deduce_language_from_filename (filename); | |
d8ce1326 | 984 | |
7d9884b9 | 985 | /* Hook it to the objfile it comes from */ |
30875e1c SG |
986 | |
987 | symtab -> objfile = objfile; | |
988 | symtab -> next = objfile -> symtabs; | |
989 | objfile -> symtabs = symtab; | |
7d9884b9 JG |
990 | |
991 | #ifdef INIT_EXTRA_SYMTAB_INFO | |
30875e1c | 992 | INIT_EXTRA_SYMTAB_INFO (symtab); |
7d9884b9 | 993 | #endif |
d8ce1326 | 994 | |
30875e1c | 995 | return (symtab); |
d8ce1326 | 996 | } |
30875e1c SG |
997 | |
998 | struct partial_symtab * | |
999 | allocate_psymtab (filename, objfile) | |
1000 | char *filename; | |
1001 | struct objfile *objfile; | |
1002 | { | |
1003 | struct partial_symtab *psymtab; | |
1004 | ||
cba0d141 JG |
1005 | if (objfile -> free_psymtabs) |
1006 | { | |
1007 | psymtab = objfile -> free_psymtabs; | |
1008 | objfile -> free_psymtabs = psymtab -> next; | |
1009 | } | |
1010 | else | |
1011 | psymtab = (struct partial_symtab *) | |
1012 | obstack_alloc (&objfile -> psymbol_obstack, | |
1013 | sizeof (struct partial_symtab)); | |
1014 | ||
30875e1c SG |
1015 | (void) memset (psymtab, 0, sizeof (struct partial_symtab)); |
1016 | psymtab -> filename = obsavestring (filename, strlen (filename), | |
1017 | &objfile -> psymbol_obstack); | |
1018 | psymtab -> symtab = NULL; | |
1019 | ||
1020 | /* Hook it to the objfile it comes from */ | |
1021 | ||
1022 | psymtab -> objfile = objfile; | |
1023 | psymtab -> next = objfile -> psymtabs; | |
1024 | objfile -> psymtabs = psymtab; | |
1025 | ||
1026 | return (psymtab); | |
1027 | } | |
1028 | ||
d8ce1326 | 1029 | \f |
9d199712 JG |
1030 | /* clear_symtab_users_once: |
1031 | ||
1032 | This function is run after symbol reading, or from a cleanup. | |
1033 | If an old symbol table was obsoleted, the old symbol table | |
1034 | has been blown away, but the other GDB data structures that may | |
1035 | reference it have not yet been cleared or re-directed. (The old | |
1036 | symtab was zapped, and the cleanup queued, in free_named_symtab() | |
1037 | below.) | |
1038 | ||
1039 | This function can be queued N times as a cleanup, or called | |
1040 | directly; it will do all the work the first time, and then will be a | |
1041 | no-op until the next time it is queued. This works by bumping a | |
1042 | counter at queueing time. Much later when the cleanup is run, or at | |
1043 | the end of symbol processing (in case the cleanup is discarded), if | |
1044 | the queued count is greater than the "done-count", we do the work | |
1045 | and set the done-count to the queued count. If the queued count is | |
1046 | less than or equal to the done-count, we just ignore the call. This | |
1047 | is needed because reading a single .o file will often replace many | |
1048 | symtabs (one per .h file, for example), and we don't want to reset | |
1049 | the breakpoints N times in the user's face. | |
1050 | ||
1051 | The reason we both queue a cleanup, and call it directly after symbol | |
1052 | reading, is because the cleanup protects us in case of errors, but is | |
1053 | discarded if symbol reading is successful. */ | |
1054 | ||
1055 | static int clear_symtab_users_queued; | |
1056 | static int clear_symtab_users_done; | |
1057 | ||
1058 | static void | |
1059 | clear_symtab_users_once () | |
1060 | { | |
1061 | /* Enforce once-per-`do_cleanups'-semantics */ | |
1062 | if (clear_symtab_users_queued <= clear_symtab_users_done) | |
1063 | return; | |
1064 | clear_symtab_users_done = clear_symtab_users_queued; | |
1065 | ||
1066 | printf ("Resetting debugger state after updating old symbol tables\n"); | |
1067 | ||
1068 | /* Someday, we should do better than this, by only blowing away | |
1069 | the things that really need to be blown. */ | |
1070 | clear_value_history (); | |
1071 | clear_displays (); | |
1072 | clear_internalvars (); | |
1073 | breakpoint_re_set (); | |
1074 | set_default_breakpoint (0, 0, 0, 0); | |
1075 | current_source_symtab = 0; | |
1076 | } | |
1077 | ||
1078 | /* Delete the specified psymtab, and any others that reference it. */ | |
1079 | ||
e1ce8aa5 | 1080 | static void |
9d199712 JG |
1081 | cashier_psymtab (pst) |
1082 | struct partial_symtab *pst; | |
1083 | { | |
1084 | struct partial_symtab *ps, *pprev; | |
1085 | int i; | |
1086 | ||
1087 | /* Find its previous psymtab in the chain */ | |
30875e1c | 1088 | for (ps = pst->objfile->psymtabs; ps; ps = ps->next) { |
9d199712 JG |
1089 | if (ps == pst) |
1090 | break; | |
1091 | pprev = ps; | |
1092 | } | |
1093 | ||
1094 | if (ps) { | |
1095 | /* Unhook it from the chain. */ | |
30875e1c SG |
1096 | if (ps == pst->objfile->psymtabs) |
1097 | pst->objfile->psymtabs = ps->next; | |
9d199712 JG |
1098 | else |
1099 | pprev->next = ps->next; | |
1100 | ||
1101 | /* FIXME, we can't conveniently deallocate the entries in the | |
1102 | partial_symbol lists (global_psymbols/static_psymbols) that | |
1103 | this psymtab points to. These just take up space until all | |
1104 | the psymtabs are reclaimed. Ditto the dependencies list and | |
1105 | filename, which are all in the psymbol_obstack. */ | |
1106 | ||
1107 | /* We need to cashier any psymtab that has this one as a dependency... */ | |
1108 | again: | |
30875e1c | 1109 | for (ps = pst->objfile->psymtabs; ps; ps = ps->next) { |
9d199712 JG |
1110 | for (i = 0; i < ps->number_of_dependencies; i++) { |
1111 | if (ps->dependencies[i] == pst) { | |
1112 | cashier_psymtab (ps); | |
1113 | goto again; /* Must restart, chain has been munged. */ | |
1114 | } | |
1115 | } | |
1116 | } | |
1117 | } | |
1118 | } | |
1119 | ||
1120 | /* If a symtab or psymtab for filename NAME is found, free it along | |
1121 | with any dependent breakpoints, displays, etc. | |
1122 | Used when loading new versions of object modules with the "add-file" | |
1123 | command. This is only called on the top-level symtab or psymtab's name; | |
1124 | it is not called for subsidiary files such as .h files. | |
1125 | ||
1126 | Return value is 1 if we blew away the environment, 0 if not. | |
30875e1c | 1127 | FIXME. The return valu appears to never be used. |
9d199712 JG |
1128 | |
1129 | FIXME. I think this is not the best way to do this. We should | |
1130 | work on being gentler to the environment while still cleaning up | |
1131 | all stray pointers into the freed symtab. */ | |
1132 | ||
1133 | int | |
1134 | free_named_symtabs (name) | |
1135 | char *name; | |
1136 | { | |
1137 | register struct symtab *s; | |
1138 | register struct symtab *prev; | |
1139 | register struct partial_symtab *ps; | |
9d199712 JG |
1140 | struct blockvector *bv; |
1141 | int blewit = 0; | |
1142 | ||
30875e1c SG |
1143 | #if 0 |
1144 | /* FIXME: With the new method of each objfile having it's own | |
1145 | psymtab list, this function needs serious rethinking. In particular, | |
1146 | why was it ever necessary to toss psymtabs with specific compilation | |
1147 | unit filenames, as opposed to all psymtabs from a particular symbol | |
1148 | file. */ | |
1149 | ||
61a7292f SG |
1150 | /* We only wack things if the symbol-reload switch is set. */ |
1151 | if (!symbol_reloading) | |
1152 | return 0; | |
1153 | ||
d11c44f1 JG |
1154 | /* Some symbol formats have trouble providing file names... */ |
1155 | if (name == 0 || *name == '\0') | |
1156 | return 0; | |
1157 | ||
9d199712 JG |
1158 | /* Look for a psymtab with the specified name. */ |
1159 | ||
1160 | again2: | |
1161 | for (ps = partial_symtab_list; ps; ps = ps->next) { | |
1162 | if (!strcmp (name, ps->filename)) { | |
1163 | cashier_psymtab (ps); /* Blow it away...and its little dog, too. */ | |
1164 | goto again2; /* Must restart, chain has been munged */ | |
1165 | } | |
1166 | } | |
1167 | ||
1168 | /* Look for a symtab with the specified name. */ | |
1169 | ||
1170 | for (s = symtab_list; s; s = s->next) | |
1171 | { | |
1172 | if (!strcmp (name, s->filename)) | |
1173 | break; | |
1174 | prev = s; | |
1175 | } | |
1176 | ||
1177 | if (s) | |
1178 | { | |
1179 | if (s == symtab_list) | |
1180 | symtab_list = s->next; | |
1181 | else | |
1182 | prev->next = s->next; | |
1183 | ||
1184 | /* For now, queue a delete for all breakpoints, displays, etc., whether | |
1185 | or not they depend on the symtab being freed. This should be | |
1186 | changed so that only those data structures affected are deleted. */ | |
1187 | ||
1188 | /* But don't delete anything if the symtab is empty. | |
1189 | This test is necessary due to a bug in "dbxread.c" that | |
1190 | causes empty symtabs to be created for N_SO symbols that | |
1191 | contain the pathname of the object file. (This problem | |
1192 | has been fixed in GDB 3.9x). */ | |
1193 | ||
c9bd6710 JG |
1194 | bv = BLOCKVECTOR (s); |
1195 | if (BLOCKVECTOR_NBLOCKS (bv) > 2 | |
9d199712 JG |
1196 | || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) |
1197 | || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK))) | |
1198 | { | |
1199 | complain (&oldsyms_complaint, name); | |
1200 | ||
1201 | clear_symtab_users_queued++; | |
1202 | make_cleanup (clear_symtab_users_once, 0); | |
1203 | blewit = 1; | |
1204 | } else { | |
1205 | complain (&empty_symtab_complaint, name); | |
1206 | } | |
1207 | ||
1208 | free_symtab (s); | |
1209 | } | |
1210 | else | |
d8ce1326 JG |
1211 | { |
1212 | /* It is still possible that some breakpoints will be affected | |
1213 | even though no symtab was found, since the file might have | |
1214 | been compiled without debugging, and hence not be associated | |
1215 | with a symtab. In order to handle this correctly, we would need | |
1216 | to keep a list of text address ranges for undebuggable files. | |
1217 | For now, we do nothing, since this is a fairly obscure case. */ | |
1218 | ; | |
1219 | } | |
9d199712 | 1220 | |
30875e1c | 1221 | /* FIXME, what about the minimal symbol table? */ |
9d199712 | 1222 | return blewit; |
30875e1c SG |
1223 | #else |
1224 | return (0); | |
1225 | #endif | |
9d199712 JG |
1226 | } |
1227 | \f | |
d4ea2aba PB |
1228 | /* Allocate and partially fill a partial symtab. It will be |
1229 | completely filled at the end of the symbol list. | |
1230 | ||
1231 | SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR | |
1232 | is the address relative to which its symbols are (incremental) or 0 | |
1233 | (normal). */ | |
1234 | ||
1235 | ||
1236 | struct partial_symtab * | |
1237 | start_psymtab_common (objfile, addr, | |
1238 | filename, textlow, global_syms, static_syms) | |
1239 | struct objfile *objfile; | |
1240 | CORE_ADDR addr; | |
1241 | char *filename; | |
1242 | CORE_ADDR textlow; | |
1243 | struct partial_symbol *global_syms; | |
1244 | struct partial_symbol *static_syms; | |
1245 | { | |
30875e1c SG |
1246 | struct partial_symtab *psymtab; |
1247 | ||
1248 | psymtab = allocate_psymtab (filename, objfile); | |
1249 | psymtab -> addr = addr; | |
1250 | psymtab -> textlow = textlow; | |
1251 | psymtab -> texthigh = psymtab -> textlow; /* default */ | |
1252 | psymtab -> globals_offset = global_syms - objfile -> global_psymbols.list; | |
1253 | psymtab -> statics_offset = static_syms - objfile -> static_psymbols.list; | |
1254 | return (psymtab); | |
7d9884b9 JG |
1255 | } |
1256 | ||
7d9884b9 | 1257 | \f |
bd5635a1 RP |
1258 | void |
1259 | _initialize_symfile () | |
1260 | { | |
1261 | ||
1262 | add_com ("symbol-file", class_files, symbol_file_command, | |
30875e1c | 1263 | "Load symbol table from executable file FILE.\n\ |
bd5635a1 RP |
1264 | The `file' command can also load symbol tables, as well as setting the file\n\ |
1265 | to execute."); | |
1266 | ||
e74d7b43 | 1267 | add_com ("add-symbol-file", class_files, add_symbol_file_command, |
bd5635a1 RP |
1268 | "Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\ |
1269 | The second argument provides the starting address of the file's text."); | |
1270 | ||
1271 | add_com ("load", class_files, load_command, | |
1272 | "Dynamically load FILE into the running program, and record its symbols\n\ | |
1273 | for access from GDB."); | |
1274 | ||
1275 | add_show_from_set | |
4369a140 | 1276 | (add_set_cmd ("complaints", class_support, var_zinteger, |
bd5635a1 RP |
1277 | (char *)&stop_whining, |
1278 | "Set max number of complaints about incorrect symbols.", | |
1279 | &setlist), | |
1280 | &showlist); | |
1281 | ||
61a7292f SG |
1282 | add_show_from_set |
1283 | (add_set_cmd ("symbol-reloading", class_support, var_boolean, | |
1284 | (char *)&symbol_reloading, | |
1285 | "Set dynamic symbol table reloading multiple times in one run.", | |
1286 | &setlist), | |
1287 | &showlist); | |
1288 | ||
bd5635a1 | 1289 | } |