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c906108c SS |
1 | /* Generic symbol file reading for the GNU debugger, GDB. |
2 | Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998 | |
3 | Free Software Foundation, Inc. | |
4 | Contributed by Cygnus Support, using pieces from other GDB modules. | |
5 | ||
c5aa993b | 6 | This file is part of GDB. |
c906108c | 7 | |
c5aa993b JM |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
c906108c | 12 | |
c5aa993b JM |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
c906108c | 17 | |
c5aa993b JM |
18 | You should have received a copy of the GNU General Public License |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, | |
21 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
22 | |
23 | #include "defs.h" | |
24 | #include "symtab.h" | |
25 | #include "gdbtypes.h" | |
26 | #include "gdbcore.h" | |
27 | #include "frame.h" | |
28 | #include "target.h" | |
29 | #include "value.h" | |
30 | #include "symfile.h" | |
31 | #include "objfiles.h" | |
32 | #include "gdbcmd.h" | |
33 | #include "breakpoint.h" | |
34 | #include "language.h" | |
35 | #include "complaints.h" | |
36 | #include "demangle.h" | |
c5aa993b | 37 | #include "inferior.h" /* for write_pc */ |
c906108c SS |
38 | #include "gdb-stabs.h" |
39 | #include "obstack.h" | |
40 | ||
41 | #include <assert.h> | |
42 | #include <sys/types.h> | |
43 | #include <fcntl.h> | |
44 | #include "gdb_string.h" | |
45 | #include "gdb_stat.h" | |
46 | #include <ctype.h> | |
47 | #include <time.h> | |
c906108c SS |
48 | |
49 | #ifndef O_BINARY | |
50 | #define O_BINARY 0 | |
51 | #endif | |
52 | ||
53 | #ifdef HPUXHPPA | |
54 | ||
55 | /* Some HP-UX related globals to clear when a new "main" | |
56 | symbol file is loaded. HP-specific. */ | |
57 | ||
58 | extern int hp_som_som_object_present; | |
59 | extern int hp_cxx_exception_support_initialized; | |
60 | #define RESET_HP_UX_GLOBALS() do {\ | |
61 | hp_som_som_object_present = 0; /* indicates HP-compiled code */ \ | |
62 | hp_cxx_exception_support_initialized = 0; /* must reinitialize exception stuff */ \ | |
63 | } while (0) | |
64 | #endif | |
65 | ||
66 | int (*ui_load_progress_hook) PARAMS ((char *, unsigned long)); | |
67 | void (*pre_add_symbol_hook) PARAMS ((char *)); | |
68 | void (*post_add_symbol_hook) PARAMS ((void)); | |
69 | ||
70 | /* Global variables owned by this file */ | |
c5aa993b | 71 | int readnow_symbol_files; /* Read full symbols immediately */ |
c906108c | 72 | |
c5aa993b JM |
73 | struct complaint oldsyms_complaint = |
74 | { | |
c906108c SS |
75 | "Replacing old symbols for `%s'", 0, 0 |
76 | }; | |
77 | ||
c5aa993b JM |
78 | struct complaint empty_symtab_complaint = |
79 | { | |
c906108c SS |
80 | "Empty symbol table found for `%s'", 0, 0 |
81 | }; | |
82 | ||
83 | /* External variables and functions referenced. */ | |
84 | ||
85 | extern int info_verbose; | |
86 | ||
87 | extern void report_transfer_performance PARAMS ((unsigned long, | |
88 | time_t, time_t)); | |
89 | ||
90 | /* Functions this file defines */ | |
91 | ||
92 | #if 0 | |
93 | static int simple_read_overlay_region_table PARAMS ((void)); | |
94 | static void simple_free_overlay_region_table PARAMS ((void)); | |
95 | #endif | |
96 | ||
97 | static void set_initial_language PARAMS ((void)); | |
98 | ||
99 | static void load_command PARAMS ((char *, int)); | |
100 | ||
101 | static void add_symbol_file_command PARAMS ((char *, int)); | |
102 | ||
103 | static void add_shared_symbol_files_command PARAMS ((char *, int)); | |
104 | ||
105 | static void cashier_psymtab PARAMS ((struct partial_symtab *)); | |
106 | ||
107 | static int compare_psymbols PARAMS ((const void *, const void *)); | |
108 | ||
109 | static int compare_symbols PARAMS ((const void *, const void *)); | |
110 | ||
111 | bfd *symfile_bfd_open PARAMS ((char *)); | |
112 | ||
113 | static void find_sym_fns PARAMS ((struct objfile *)); | |
114 | ||
115 | static void decrement_reading_symtab PARAMS ((void *)); | |
116 | ||
117 | static void overlay_invalidate_all PARAMS ((void)); | |
118 | ||
119 | static int overlay_is_mapped PARAMS ((struct obj_section *)); | |
120 | ||
121 | void list_overlays_command PARAMS ((char *, int)); | |
122 | ||
123 | void map_overlay_command PARAMS ((char *, int)); | |
124 | ||
125 | void unmap_overlay_command PARAMS ((char *, int)); | |
126 | ||
127 | static void overlay_auto_command PARAMS ((char *, int)); | |
128 | ||
129 | static void overlay_manual_command PARAMS ((char *, int)); | |
130 | ||
131 | static void overlay_off_command PARAMS ((char *, int)); | |
132 | ||
133 | static void overlay_load_command PARAMS ((char *, int)); | |
134 | ||
135 | static void overlay_command PARAMS ((char *, int)); | |
136 | ||
137 | static void simple_free_overlay_table PARAMS ((void)); | |
138 | ||
139 | static void read_target_long_array PARAMS ((CORE_ADDR, unsigned int *, int)); | |
140 | ||
141 | static int simple_read_overlay_table PARAMS ((void)); | |
142 | ||
143 | static int simple_overlay_update_1 PARAMS ((struct obj_section *)); | |
144 | ||
392a587b JM |
145 | static void add_filename_language PARAMS ((char *ext, enum language lang)); |
146 | ||
147 | static void set_ext_lang_command PARAMS ((char *args, int from_tty)); | |
148 | ||
149 | static void info_ext_lang_command PARAMS ((char *args, int from_tty)); | |
150 | ||
151 | static void init_filename_language_table PARAMS ((void)); | |
152 | ||
c906108c SS |
153 | void _initialize_symfile PARAMS ((void)); |
154 | ||
155 | /* List of all available sym_fns. On gdb startup, each object file reader | |
156 | calls add_symtab_fns() to register information on each format it is | |
157 | prepared to read. */ | |
158 | ||
159 | static struct sym_fns *symtab_fns = NULL; | |
160 | ||
161 | /* Flag for whether user will be reloading symbols multiple times. | |
162 | Defaults to ON for VxWorks, otherwise OFF. */ | |
163 | ||
164 | #ifdef SYMBOL_RELOADING_DEFAULT | |
165 | int symbol_reloading = SYMBOL_RELOADING_DEFAULT; | |
166 | #else | |
167 | int symbol_reloading = 0; | |
168 | #endif | |
169 | ||
170 | /* If non-zero, then on HP-UX (i.e., platforms that use somsolib.c), | |
171 | this variable is interpreted as a threshhold. If adding a new | |
172 | library's symbol table to those already known to the debugger would | |
173 | exceed this threshhold, then the shlib's symbols are not added. | |
174 | ||
175 | If non-zero on other platforms, shared library symbols will be added | |
176 | automatically when the inferior is created, new libraries are loaded, | |
177 | or when attaching to the inferior. This is almost always what users | |
178 | will want to have happen; but for very large programs, the startup | |
179 | time will be excessive, and so if this is a problem, the user can | |
180 | clear this flag and then add the shared library symbols as needed. | |
181 | Note that there is a potential for confusion, since if the shared | |
182 | library symbols are not loaded, commands like "info fun" will *not* | |
183 | report all the functions that are actually present. | |
184 | ||
185 | Note that HP-UX interprets this variable to mean, "threshhold size | |
186 | in megabytes, where zero means never add". Other platforms interpret | |
187 | this variable to mean, "always add if non-zero, never add if zero." | |
c5aa993b | 188 | */ |
c906108c SS |
189 | |
190 | int auto_solib_add = 1; | |
c906108c | 191 | \f |
c5aa993b | 192 | |
c906108c SS |
193 | /* Since this function is called from within qsort, in an ANSI environment |
194 | it must conform to the prototype for qsort, which specifies that the | |
195 | comparison function takes two "void *" pointers. */ | |
196 | ||
197 | static int | |
198 | compare_symbols (s1p, s2p) | |
199 | const PTR s1p; | |
200 | const PTR s2p; | |
201 | { | |
202 | register struct symbol **s1, **s2; | |
203 | ||
204 | s1 = (struct symbol **) s1p; | |
205 | s2 = (struct symbol **) s2p; | |
206 | ||
207 | return (STRCMP (SYMBOL_NAME (*s1), SYMBOL_NAME (*s2))); | |
208 | } | |
209 | ||
210 | /* | |
211 | ||
c5aa993b | 212 | LOCAL FUNCTION |
c906108c | 213 | |
c5aa993b | 214 | compare_psymbols -- compare two partial symbols by name |
c906108c | 215 | |
c5aa993b | 216 | DESCRIPTION |
c906108c | 217 | |
c5aa993b JM |
218 | Given pointers to pointers to two partial symbol table entries, |
219 | compare them by name and return -N, 0, or +N (ala strcmp). | |
220 | Typically used by sorting routines like qsort(). | |
c906108c | 221 | |
c5aa993b | 222 | NOTES |
c906108c | 223 | |
c5aa993b JM |
224 | Does direct compare of first two characters before punting |
225 | and passing to strcmp for longer compares. Note that the | |
226 | original version had a bug whereby two null strings or two | |
227 | identically named one character strings would return the | |
228 | comparison of memory following the null byte. | |
c906108c SS |
229 | |
230 | */ | |
231 | ||
232 | static int | |
233 | compare_psymbols (s1p, s2p) | |
234 | const PTR s1p; | |
235 | const PTR s2p; | |
236 | { | |
237 | register char *st1 = SYMBOL_NAME (*(struct partial_symbol **) s1p); | |
238 | register char *st2 = SYMBOL_NAME (*(struct partial_symbol **) s2p); | |
239 | ||
240 | if ((st1[0] - st2[0]) || !st1[0]) | |
241 | { | |
242 | return (st1[0] - st2[0]); | |
243 | } | |
244 | else if ((st1[1] - st2[1]) || !st1[1]) | |
245 | { | |
246 | return (st1[1] - st2[1]); | |
247 | } | |
248 | else | |
249 | { | |
250 | /* Note: I replaced the STRCMP line (commented out below) | |
251 | * with a simpler "strcmp()" which compares the 2 strings | |
252 | * from the beginning. (STRCMP is a macro which first compares | |
253 | * the initial characters, then falls back on strcmp). | |
254 | * The reason is that the STRCMP line was tickling a C compiler | |
255 | * bug on HP-UX 10.30, which is avoided with the simpler | |
256 | * code. The performance gain from the more complicated code | |
257 | * is negligible, given that we have already checked the | |
258 | * initial 2 characters above. I reported the compiler bug, | |
259 | * and once it is fixed the original line can be put back. RT | |
260 | */ | |
261 | /* return ( STRCMP (st1 + 2, st2 + 2)); */ | |
c5aa993b | 262 | return (strcmp (st1, st2)); |
c906108c SS |
263 | } |
264 | } | |
265 | ||
266 | void | |
267 | sort_pst_symbols (pst) | |
268 | struct partial_symtab *pst; | |
269 | { | |
270 | /* Sort the global list; don't sort the static list */ | |
271 | ||
c5aa993b JM |
272 | qsort (pst->objfile->global_psymbols.list + pst->globals_offset, |
273 | pst->n_global_syms, sizeof (struct partial_symbol *), | |
c906108c SS |
274 | compare_psymbols); |
275 | } | |
276 | ||
277 | /* Call sort_block_syms to sort alphabetically the symbols of one block. */ | |
278 | ||
279 | void | |
280 | sort_block_syms (b) | |
281 | register struct block *b; | |
282 | { | |
283 | qsort (&BLOCK_SYM (b, 0), BLOCK_NSYMS (b), | |
284 | sizeof (struct symbol *), compare_symbols); | |
285 | } | |
286 | ||
287 | /* Call sort_symtab_syms to sort alphabetically | |
288 | the symbols of each block of one symtab. */ | |
289 | ||
290 | void | |
291 | sort_symtab_syms (s) | |
292 | register struct symtab *s; | |
293 | { | |
294 | register struct blockvector *bv; | |
295 | int nbl; | |
296 | int i; | |
297 | register struct block *b; | |
298 | ||
299 | if (s == 0) | |
300 | return; | |
301 | bv = BLOCKVECTOR (s); | |
302 | nbl = BLOCKVECTOR_NBLOCKS (bv); | |
303 | for (i = 0; i < nbl; i++) | |
304 | { | |
305 | b = BLOCKVECTOR_BLOCK (bv, i); | |
306 | if (BLOCK_SHOULD_SORT (b)) | |
307 | sort_block_syms (b); | |
308 | } | |
309 | } | |
310 | ||
311 | /* Make a null terminated copy of the string at PTR with SIZE characters in | |
312 | the obstack pointed to by OBSTACKP . Returns the address of the copy. | |
313 | Note that the string at PTR does not have to be null terminated, I.E. it | |
314 | may be part of a larger string and we are only saving a substring. */ | |
315 | ||
316 | char * | |
317 | obsavestring (ptr, size, obstackp) | |
318 | char *ptr; | |
319 | int size; | |
320 | struct obstack *obstackp; | |
321 | { | |
322 | register char *p = (char *) obstack_alloc (obstackp, size + 1); | |
323 | /* Open-coded memcpy--saves function call time. These strings are usually | |
324 | short. FIXME: Is this really still true with a compiler that can | |
325 | inline memcpy? */ | |
326 | { | |
327 | register char *p1 = ptr; | |
328 | register char *p2 = p; | |
329 | char *end = ptr + size; | |
330 | while (p1 != end) | |
331 | *p2++ = *p1++; | |
332 | } | |
333 | p[size] = 0; | |
334 | return p; | |
335 | } | |
336 | ||
337 | /* Concatenate strings S1, S2 and S3; return the new string. Space is found | |
338 | in the obstack pointed to by OBSTACKP. */ | |
339 | ||
340 | char * | |
341 | obconcat (obstackp, s1, s2, s3) | |
342 | struct obstack *obstackp; | |
343 | const char *s1, *s2, *s3; | |
344 | { | |
345 | register int len = strlen (s1) + strlen (s2) + strlen (s3) + 1; | |
346 | register char *val = (char *) obstack_alloc (obstackp, len); | |
347 | strcpy (val, s1); | |
348 | strcat (val, s2); | |
349 | strcat (val, s3); | |
350 | return val; | |
351 | } | |
352 | ||
353 | /* True if we are nested inside psymtab_to_symtab. */ | |
354 | ||
355 | int currently_reading_symtab = 0; | |
356 | ||
357 | static void | |
358 | decrement_reading_symtab (dummy) | |
359 | void *dummy; | |
360 | { | |
361 | currently_reading_symtab--; | |
362 | } | |
363 | ||
364 | /* Get the symbol table that corresponds to a partial_symtab. | |
365 | This is fast after the first time you do it. In fact, there | |
366 | is an even faster macro PSYMTAB_TO_SYMTAB that does the fast | |
367 | case inline. */ | |
368 | ||
369 | struct symtab * | |
370 | psymtab_to_symtab (pst) | |
371 | register struct partial_symtab *pst; | |
372 | { | |
373 | /* If it's been looked up before, return it. */ | |
374 | if (pst->symtab) | |
375 | return pst->symtab; | |
376 | ||
377 | /* If it has not yet been read in, read it. */ | |
378 | if (!pst->readin) | |
c5aa993b | 379 | { |
c906108c SS |
380 | struct cleanup *back_to = make_cleanup (decrement_reading_symtab, NULL); |
381 | currently_reading_symtab++; | |
382 | (*pst->read_symtab) (pst); | |
383 | do_cleanups (back_to); | |
384 | } | |
385 | ||
386 | return pst->symtab; | |
387 | } | |
388 | ||
389 | /* Initialize entry point information for this objfile. */ | |
390 | ||
391 | void | |
392 | init_entry_point_info (objfile) | |
393 | struct objfile *objfile; | |
394 | { | |
395 | /* Save startup file's range of PC addresses to help blockframe.c | |
396 | decide where the bottom of the stack is. */ | |
397 | ||
c5aa993b | 398 | if (bfd_get_file_flags (objfile->obfd) & EXEC_P) |
c906108c SS |
399 | { |
400 | /* Executable file -- record its entry point so we'll recognize | |
c5aa993b JM |
401 | the startup file because it contains the entry point. */ |
402 | objfile->ei.entry_point = bfd_get_start_address (objfile->obfd); | |
c906108c SS |
403 | } |
404 | else | |
405 | { | |
406 | /* Examination of non-executable.o files. Short-circuit this stuff. */ | |
c5aa993b | 407 | objfile->ei.entry_point = INVALID_ENTRY_POINT; |
c906108c | 408 | } |
c5aa993b JM |
409 | objfile->ei.entry_file_lowpc = INVALID_ENTRY_LOWPC; |
410 | objfile->ei.entry_file_highpc = INVALID_ENTRY_HIGHPC; | |
411 | objfile->ei.entry_func_lowpc = INVALID_ENTRY_LOWPC; | |
412 | objfile->ei.entry_func_highpc = INVALID_ENTRY_HIGHPC; | |
413 | objfile->ei.main_func_lowpc = INVALID_ENTRY_LOWPC; | |
414 | objfile->ei.main_func_highpc = INVALID_ENTRY_HIGHPC; | |
c906108c SS |
415 | } |
416 | ||
417 | /* Get current entry point address. */ | |
418 | ||
419 | CORE_ADDR | |
c5aa993b | 420 | entry_point_address () |
c906108c SS |
421 | { |
422 | return symfile_objfile ? symfile_objfile->ei.entry_point : 0; | |
423 | } | |
424 | ||
425 | /* Remember the lowest-addressed loadable section we've seen. | |
426 | This function is called via bfd_map_over_sections. | |
427 | ||
428 | In case of equal vmas, the section with the largest size becomes the | |
429 | lowest-addressed loadable section. | |
430 | ||
431 | If the vmas and sizes are equal, the last section is considered the | |
432 | lowest-addressed loadable section. */ | |
433 | ||
434 | void | |
435 | find_lowest_section (abfd, sect, obj) | |
436 | bfd *abfd; | |
437 | asection *sect; | |
438 | PTR obj; | |
439 | { | |
c5aa993b | 440 | asection **lowest = (asection **) obj; |
c906108c SS |
441 | |
442 | if (0 == (bfd_get_section_flags (abfd, sect) & SEC_LOAD)) | |
443 | return; | |
444 | if (!*lowest) | |
445 | *lowest = sect; /* First loadable section */ | |
446 | else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect)) | |
447 | *lowest = sect; /* A lower loadable section */ | |
448 | else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect) | |
449 | && (bfd_section_size (abfd, (*lowest)) | |
450 | <= bfd_section_size (abfd, sect))) | |
451 | *lowest = sect; | |
452 | } | |
453 | ||
454 | /* Parse the user's idea of an offset for dynamic linking, into our idea | |
455 | of how to represent it for fast symbol reading. This is the default | |
456 | version of the sym_fns.sym_offsets function for symbol readers that | |
457 | don't need to do anything special. It allocates a section_offsets table | |
458 | for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */ | |
459 | ||
d4f3574e | 460 | void |
c906108c SS |
461 | default_symfile_offsets (objfile, addr) |
462 | struct objfile *objfile; | |
463 | CORE_ADDR addr; | |
464 | { | |
c906108c SS |
465 | int i; |
466 | ||
467 | objfile->num_sections = SECT_OFF_MAX; | |
d4f3574e | 468 | objfile->section_offsets = (struct section_offsets *) |
c5aa993b | 469 | obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS); |
d4f3574e | 470 | memset (objfile->section_offsets, 0, SIZEOF_SECTION_OFFSETS); |
c906108c SS |
471 | |
472 | for (i = 0; i < SECT_OFF_MAX; i++) | |
d4f3574e | 473 | ANOFFSET (objfile->section_offsets, i) = addr; |
c906108c SS |
474 | } |
475 | ||
476 | ||
477 | /* Process a symbol file, as either the main file or as a dynamically | |
478 | loaded file. | |
479 | ||
96baa820 JM |
480 | OBJFILE is where the symbols are to be read from. |
481 | ||
482 | ADDR is the address where the text segment was loaded, unless the | |
483 | objfile is the main symbol file, in which case it is zero. | |
484 | ||
485 | MAINLINE is nonzero if this is the main symbol file, or zero if | |
486 | it's an extra symbol file such as dynamically loaded code. | |
487 | ||
488 | VERBO is nonzero if the caller has printed a verbose message about | |
489 | the symbol reading (and complaints can be more terse about it). */ | |
c906108c SS |
490 | |
491 | void | |
492 | syms_from_objfile (objfile, addr, mainline, verbo) | |
493 | struct objfile *objfile; | |
494 | CORE_ADDR addr; | |
495 | int mainline; | |
496 | int verbo; | |
497 | { | |
498 | struct section_offsets *section_offsets; | |
499 | asection *lowest_sect; | |
500 | struct cleanup *old_chain; | |
501 | ||
502 | init_entry_point_info (objfile); | |
503 | find_sym_fns (objfile); | |
504 | ||
505 | /* Make sure that partially constructed symbol tables will be cleaned up | |
506 | if an error occurs during symbol reading. */ | |
507 | old_chain = make_cleanup ((make_cleanup_func) free_objfile, objfile); | |
508 | ||
c5aa993b | 509 | if (mainline) |
c906108c SS |
510 | { |
511 | /* We will modify the main symbol table, make sure that all its users | |
c5aa993b | 512 | will be cleaned up if an error occurs during symbol reading. */ |
c906108c SS |
513 | make_cleanup ((make_cleanup_func) clear_symtab_users, 0); |
514 | ||
515 | /* Since no error yet, throw away the old symbol table. */ | |
516 | ||
517 | if (symfile_objfile != NULL) | |
518 | { | |
519 | free_objfile (symfile_objfile); | |
520 | symfile_objfile = NULL; | |
521 | } | |
522 | ||
523 | /* Currently we keep symbols from the add-symbol-file command. | |
c5aa993b JM |
524 | If the user wants to get rid of them, they should do "symbol-file" |
525 | without arguments first. Not sure this is the best behavior | |
526 | (PR 2207). */ | |
c906108c | 527 | |
c5aa993b | 528 | (*objfile->sf->sym_new_init) (objfile); |
c906108c SS |
529 | } |
530 | ||
531 | /* Convert addr into an offset rather than an absolute address. | |
532 | We find the lowest address of a loaded segment in the objfile, | |
53a5351d | 533 | and assume that <addr> is where that got loaded. |
c906108c | 534 | |
53a5351d JM |
535 | We no longer warn if the lowest section is not a text segment (as |
536 | happens for the PA64 port. */ | |
c906108c SS |
537 | if (mainline) |
538 | { | |
c5aa993b | 539 | addr = 0; /* No offset from objfile addresses. */ |
c906108c SS |
540 | } |
541 | else | |
542 | { | |
543 | lowest_sect = bfd_get_section_by_name (objfile->obfd, ".text"); | |
544 | if (lowest_sect == NULL) | |
545 | bfd_map_over_sections (objfile->obfd, find_lowest_section, | |
96baa820 | 546 | (PTR) &lowest_sect); |
c906108c SS |
547 | |
548 | if (lowest_sect == NULL) | |
549 | warning ("no loadable sections found in added symbol-file %s", | |
550 | objfile->name); | |
c906108c SS |
551 | |
552 | if (lowest_sect) | |
553 | addr -= bfd_section_vma (objfile->obfd, lowest_sect); | |
554 | } | |
555 | ||
556 | /* Initialize symbol reading routines for this objfile, allow complaints to | |
557 | appear for this new file, and record how verbose to be, then do the | |
558 | initial symbol reading for this file. */ | |
559 | ||
c5aa993b | 560 | (*objfile->sf->sym_init) (objfile); |
c906108c SS |
561 | clear_complaints (1, verbo); |
562 | ||
d4f3574e | 563 | (*objfile->sf->sym_offsets) (objfile, addr); |
c906108c SS |
564 | |
565 | #ifndef IBM6000_TARGET | |
566 | /* This is a SVR4/SunOS specific hack, I think. In any event, it | |
567 | screws RS/6000. sym_offsets should be doing this sort of thing, | |
568 | because it knows the mapping between bfd sections and | |
569 | section_offsets. */ | |
570 | /* This is a hack. As far as I can tell, section offsets are not | |
571 | target dependent. They are all set to addr with a couple of | |
572 | exceptions. The exceptions are sysvr4 shared libraries, whose | |
573 | offsets are kept in solib structures anyway and rs6000 xcoff | |
574 | which handles shared libraries in a completely unique way. | |
575 | ||
576 | Section offsets are built similarly, except that they are built | |
577 | by adding addr in all cases because there is no clear mapping | |
578 | from section_offsets into actual sections. Note that solib.c | |
96baa820 | 579 | has a different algorithm for finding section offsets. |
c906108c SS |
580 | |
581 | These should probably all be collapsed into some target | |
582 | independent form of shared library support. FIXME. */ | |
583 | ||
584 | if (addr) | |
585 | { | |
586 | struct obj_section *s; | |
587 | ||
96baa820 | 588 | ALL_OBJFILE_OSECTIONS (objfile, s) |
c906108c SS |
589 | { |
590 | s->addr -= s->offset; | |
591 | s->addr += addr; | |
592 | s->endaddr -= s->offset; | |
593 | s->endaddr += addr; | |
594 | s->offset += addr; | |
595 | } | |
596 | } | |
597 | #endif /* not IBM6000_TARGET */ | |
598 | ||
96baa820 | 599 | (*objfile->sf->sym_read) (objfile, mainline); |
c906108c SS |
600 | |
601 | if (!have_partial_symbols () && !have_full_symbols ()) | |
602 | { | |
603 | wrap_here (""); | |
604 | printf_filtered ("(no debugging symbols found)..."); | |
605 | wrap_here (""); | |
606 | } | |
607 | ||
608 | /* Don't allow char * to have a typename (else would get caddr_t). | |
609 | Ditto void *. FIXME: Check whether this is now done by all the | |
610 | symbol readers themselves (many of them now do), and if so remove | |
611 | it from here. */ | |
612 | ||
613 | TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0; | |
614 | TYPE_NAME (lookup_pointer_type (builtin_type_void)) = 0; | |
615 | ||
616 | /* Mark the objfile has having had initial symbol read attempted. Note | |
617 | that this does not mean we found any symbols... */ | |
618 | ||
c5aa993b | 619 | objfile->flags |= OBJF_SYMS; |
c906108c SS |
620 | |
621 | /* Discard cleanups as symbol reading was successful. */ | |
622 | ||
623 | discard_cleanups (old_chain); | |
624 | ||
96baa820 JM |
625 | /* Call this after reading in a new symbol table to give target |
626 | dependant code a crack at the new symbols. For instance, this | |
627 | could be used to update the values of target-specific symbols GDB | |
628 | needs to keep track of (such as _sigtramp, or whatever). */ | |
c906108c SS |
629 | |
630 | TARGET_SYMFILE_POSTREAD (objfile); | |
631 | } | |
632 | ||
633 | /* Perform required actions after either reading in the initial | |
634 | symbols for a new objfile, or mapping in the symbols from a reusable | |
635 | objfile. */ | |
c5aa993b | 636 | |
c906108c SS |
637 | void |
638 | new_symfile_objfile (objfile, mainline, verbo) | |
639 | struct objfile *objfile; | |
640 | int mainline; | |
641 | int verbo; | |
642 | { | |
643 | ||
644 | /* If this is the main symbol file we have to clean up all users of the | |
645 | old main symbol file. Otherwise it is sufficient to fixup all the | |
646 | breakpoints that may have been redefined by this symbol file. */ | |
647 | if (mainline) | |
648 | { | |
649 | /* OK, make it the "real" symbol file. */ | |
650 | symfile_objfile = objfile; | |
651 | ||
652 | clear_symtab_users (); | |
653 | } | |
654 | else | |
655 | { | |
656 | breakpoint_re_set (); | |
657 | } | |
658 | ||
659 | /* We're done reading the symbol file; finish off complaints. */ | |
660 | clear_complaints (0, verbo); | |
661 | } | |
662 | ||
663 | /* Process a symbol file, as either the main file or as a dynamically | |
664 | loaded file. | |
665 | ||
666 | NAME is the file name (which will be tilde-expanded and made | |
667 | absolute herein) (but we don't free or modify NAME itself). | |
668 | FROM_TTY says how verbose to be. MAINLINE specifies whether this | |
669 | is the main symbol file, or whether it's an extra symbol file such | |
670 | as dynamically loaded code. If !mainline, ADDR is the address | |
671 | where the text segment was loaded. | |
672 | ||
673 | USER_LOADED is TRUE if the add-symbol-file command was how this | |
674 | symbol file came to be processed. | |
675 | ||
676 | IS_SOLIB is TRUE if this symbol file represents a solib, as discovered | |
677 | by the target's implementation of the solib package. | |
678 | ||
679 | Upon success, returns a pointer to the objfile that was added. | |
680 | Upon failure, jumps back to command level (never returns). */ | |
681 | ||
682 | struct objfile * | |
683 | symbol_file_add (name, from_tty, addr, mainline, mapped, readnow, user_loaded, is_solib) | |
684 | char *name; | |
685 | int from_tty; | |
686 | CORE_ADDR addr; | |
687 | int mainline; | |
688 | int mapped; | |
689 | int readnow; | |
c5aa993b JM |
690 | int user_loaded; |
691 | int is_solib; | |
c906108c SS |
692 | { |
693 | struct objfile *objfile; | |
694 | struct partial_symtab *psymtab; | |
695 | bfd *abfd; | |
696 | ||
697 | /* Open a bfd for the file, and give user a chance to burp if we'd be | |
698 | interactively wiping out any existing symbols. */ | |
699 | ||
700 | abfd = symfile_bfd_open (name); | |
701 | ||
702 | if ((have_full_symbols () || have_partial_symbols ()) | |
703 | && mainline | |
704 | && from_tty | |
705 | && !query ("Load new symbol table from \"%s\"? ", name)) | |
c5aa993b | 706 | error ("Not confirmed."); |
c906108c SS |
707 | |
708 | objfile = allocate_objfile (abfd, mapped, user_loaded, is_solib); | |
709 | ||
710 | /* If the objfile uses a mapped symbol file, and we have a psymtab for | |
711 | it, then skip reading any symbols at this time. */ | |
712 | ||
c5aa993b | 713 | if ((objfile->flags & OBJF_MAPPED) && (objfile->flags & OBJF_SYMS)) |
c906108c SS |
714 | { |
715 | /* We mapped in an existing symbol table file that already has had | |
c5aa993b JM |
716 | initial symbol reading performed, so we can skip that part. Notify |
717 | the user that instead of reading the symbols, they have been mapped. | |
718 | */ | |
c906108c SS |
719 | if (from_tty || info_verbose) |
720 | { | |
721 | printf_filtered ("Mapped symbols for %s...", name); | |
722 | wrap_here (""); | |
723 | gdb_flush (gdb_stdout); | |
724 | } | |
725 | init_entry_point_info (objfile); | |
726 | find_sym_fns (objfile); | |
727 | } | |
728 | else | |
729 | { | |
730 | /* We either created a new mapped symbol table, mapped an existing | |
c5aa993b JM |
731 | symbol table file which has not had initial symbol reading |
732 | performed, or need to read an unmapped symbol table. */ | |
c906108c SS |
733 | if (from_tty || info_verbose) |
734 | { | |
735 | if (pre_add_symbol_hook) | |
736 | pre_add_symbol_hook (name); | |
737 | else | |
738 | { | |
739 | printf_filtered ("Reading symbols from %s...", name); | |
740 | wrap_here (""); | |
741 | gdb_flush (gdb_stdout); | |
742 | } | |
743 | } | |
744 | syms_from_objfile (objfile, addr, mainline, from_tty); | |
745 | } | |
746 | ||
747 | /* We now have at least a partial symbol table. Check to see if the | |
748 | user requested that all symbols be read on initial access via either | |
749 | the gdb startup command line or on a per symbol file basis. Expand | |
750 | all partial symbol tables for this objfile if so. */ | |
751 | ||
752 | if (readnow || readnow_symbol_files) | |
753 | { | |
754 | if (from_tty || info_verbose) | |
755 | { | |
756 | printf_filtered ("expanding to full symbols..."); | |
757 | wrap_here (""); | |
758 | gdb_flush (gdb_stdout); | |
759 | } | |
760 | ||
c5aa993b | 761 | for (psymtab = objfile->psymtabs; |
c906108c | 762 | psymtab != NULL; |
c5aa993b | 763 | psymtab = psymtab->next) |
c906108c SS |
764 | { |
765 | psymtab_to_symtab (psymtab); | |
766 | } | |
767 | } | |
768 | ||
769 | if (from_tty || info_verbose) | |
770 | { | |
771 | if (post_add_symbol_hook) | |
c5aa993b | 772 | post_add_symbol_hook (); |
c906108c | 773 | else |
c5aa993b JM |
774 | { |
775 | printf_filtered ("done.\n"); | |
776 | gdb_flush (gdb_stdout); | |
777 | } | |
c906108c SS |
778 | } |
779 | ||
780 | new_symfile_objfile (objfile, mainline, from_tty); | |
781 | ||
782 | target_new_objfile (objfile); | |
783 | ||
784 | return (objfile); | |
785 | } | |
786 | ||
787 | /* This is the symbol-file command. Read the file, analyze its | |
788 | symbols, and add a struct symtab to a symtab list. The syntax of | |
789 | the command is rather bizarre--(1) buildargv implements various | |
790 | quoting conventions which are undocumented and have little or | |
791 | nothing in common with the way things are quoted (or not quoted) | |
792 | elsewhere in GDB, (2) options are used, which are not generally | |
793 | used in GDB (perhaps "set mapped on", "set readnow on" would be | |
794 | better), (3) the order of options matters, which is contrary to GNU | |
795 | conventions (because it is confusing and inconvenient). */ | |
796 | ||
797 | void | |
798 | symbol_file_command (args, from_tty) | |
799 | char *args; | |
800 | int from_tty; | |
801 | { | |
802 | char **argv; | |
803 | char *name = NULL; | |
c5aa993b | 804 | CORE_ADDR text_relocation = 0; /* text_relocation */ |
c906108c SS |
805 | struct cleanup *cleanups; |
806 | int mapped = 0; | |
807 | int readnow = 0; | |
808 | ||
809 | dont_repeat (); | |
810 | ||
811 | if (args == NULL) | |
812 | { | |
813 | if ((have_full_symbols () || have_partial_symbols ()) | |
814 | && from_tty | |
815 | && !query ("Discard symbol table from `%s'? ", | |
c5aa993b | 816 | symfile_objfile->name)) |
c906108c SS |
817 | error ("Not confirmed."); |
818 | free_all_objfiles (); | |
819 | ||
820 | /* solib descriptors may have handles to objfiles. Since their | |
821 | storage has just been released, we'd better wipe the solib | |
822 | descriptors as well. | |
c5aa993b | 823 | */ |
c906108c SS |
824 | #if defined(SOLIB_RESTART) |
825 | SOLIB_RESTART (); | |
826 | #endif | |
827 | ||
828 | symfile_objfile = NULL; | |
829 | if (from_tty) | |
830 | { | |
831 | printf_unfiltered ("No symbol file now.\n"); | |
832 | } | |
833 | #ifdef HPUXHPPA | |
834 | RESET_HP_UX_GLOBALS (); | |
835 | #endif | |
836 | } | |
837 | else | |
838 | { | |
839 | if ((argv = buildargv (args)) == NULL) | |
840 | { | |
841 | nomem (0); | |
842 | } | |
7a292a7a | 843 | cleanups = make_cleanup_freeargv (argv); |
c906108c SS |
844 | while (*argv != NULL) |
845 | { | |
846 | if (STREQ (*argv, "-mapped")) | |
847 | { | |
848 | mapped = 1; | |
849 | } | |
850 | else if (STREQ (*argv, "-readnow")) | |
851 | { | |
852 | readnow = 1; | |
853 | } | |
854 | else if (**argv == '-') | |
855 | { | |
856 | error ("unknown option `%s'", *argv); | |
857 | } | |
858 | else | |
859 | { | |
c5aa993b | 860 | char *p; |
c906108c | 861 | |
c5aa993b | 862 | name = *argv; |
c906108c | 863 | |
c5aa993b JM |
864 | /* this is for rombug remote only, to get the text relocation by |
865 | using link command */ | |
866 | p = strrchr (name, '/'); | |
867 | if (p != NULL) | |
868 | p++; | |
869 | else | |
870 | p = name; | |
c906108c | 871 | |
c5aa993b | 872 | target_link (p, &text_relocation); |
c906108c | 873 | |
c5aa993b JM |
874 | if (text_relocation == (CORE_ADDR) 0) |
875 | return; | |
a0b3c4fd | 876 | else if (text_relocation == (CORE_ADDR) -1) |
c5aa993b JM |
877 | { |
878 | symbol_file_add (name, from_tty, (CORE_ADDR) 0, | |
879 | 1, mapped, readnow, 1, 0); | |
c906108c | 880 | #ifdef HPUXHPPA |
c5aa993b | 881 | RESET_HP_UX_GLOBALS (); |
c906108c | 882 | #endif |
c5aa993b JM |
883 | } |
884 | else | |
885 | symbol_file_add (name, from_tty, (CORE_ADDR) text_relocation, | |
c906108c SS |
886 | 0, mapped, readnow, 1, 0); |
887 | ||
888 | /* Getting new symbols may change our opinion about what is | |
c5aa993b | 889 | frameless. */ |
c906108c SS |
890 | reinit_frame_cache (); |
891 | ||
c5aa993b | 892 | set_initial_language (); |
c906108c SS |
893 | } |
894 | argv++; | |
895 | } | |
896 | ||
897 | if (name == NULL) | |
898 | { | |
899 | error ("no symbol file name was specified"); | |
900 | } | |
c5aa993b | 901 | TUIDO (((TuiOpaqueFuncPtr) tuiDisplayMainFunction)); |
c906108c SS |
902 | do_cleanups (cleanups); |
903 | } | |
904 | } | |
905 | ||
906 | /* Set the initial language. | |
907 | ||
908 | A better solution would be to record the language in the psymtab when reading | |
909 | partial symbols, and then use it (if known) to set the language. This would | |
910 | be a win for formats that encode the language in an easily discoverable place, | |
911 | such as DWARF. For stabs, we can jump through hoops looking for specially | |
912 | named symbols or try to intuit the language from the specific type of stabs | |
913 | we find, but we can't do that until later when we read in full symbols. | |
914 | FIXME. */ | |
915 | ||
916 | static void | |
917 | set_initial_language () | |
918 | { | |
919 | struct partial_symtab *pst; | |
c5aa993b | 920 | enum language lang = language_unknown; |
c906108c SS |
921 | |
922 | pst = find_main_psymtab (); | |
923 | if (pst != NULL) | |
924 | { | |
c5aa993b | 925 | if (pst->filename != NULL) |
c906108c | 926 | { |
c5aa993b JM |
927 | lang = deduce_language_from_filename (pst->filename); |
928 | } | |
c906108c SS |
929 | if (lang == language_unknown) |
930 | { | |
c5aa993b JM |
931 | /* Make C the default language */ |
932 | lang = language_c; | |
c906108c SS |
933 | } |
934 | set_language (lang); | |
935 | expected_language = current_language; /* Don't warn the user */ | |
936 | } | |
937 | } | |
938 | ||
939 | /* Open file specified by NAME and hand it off to BFD for preliminary | |
940 | analysis. Result is a newly initialized bfd *, which includes a newly | |
941 | malloc'd` copy of NAME (tilde-expanded and made absolute). | |
942 | In case of trouble, error() is called. */ | |
943 | ||
944 | bfd * | |
945 | symfile_bfd_open (name) | |
946 | char *name; | |
947 | { | |
948 | bfd *sym_bfd; | |
949 | int desc; | |
950 | char *absolute_name; | |
951 | ||
952 | ||
953 | ||
954 | name = tilde_expand (name); /* Returns 1st new malloc'd copy */ | |
955 | ||
956 | /* Look down path for it, allocate 2nd new malloc'd copy. */ | |
957 | desc = openp (getenv ("PATH"), 1, name, O_RDONLY | O_BINARY, 0, &absolute_name); | |
958 | #if defined(__GO32__) || defined(_WIN32) | |
959 | if (desc < 0) | |
960 | { | |
961 | char *exename = alloca (strlen (name) + 5); | |
962 | strcat (strcpy (exename, name), ".exe"); | |
963 | desc = openp (getenv ("PATH"), 1, exename, O_RDONLY | O_BINARY, | |
c5aa993b | 964 | 0, &absolute_name); |
c906108c SS |
965 | } |
966 | #endif | |
967 | if (desc < 0) | |
968 | { | |
969 | make_cleanup (free, name); | |
970 | perror_with_name (name); | |
971 | } | |
972 | free (name); /* Free 1st new malloc'd copy */ | |
973 | name = absolute_name; /* Keep 2nd malloc'd copy in bfd */ | |
c5aa993b | 974 | /* It'll be freed in free_objfile(). */ |
c906108c SS |
975 | |
976 | sym_bfd = bfd_fdopenr (name, gnutarget, desc); | |
977 | if (!sym_bfd) | |
978 | { | |
979 | close (desc); | |
980 | make_cleanup (free, name); | |
981 | error ("\"%s\": can't open to read symbols: %s.", name, | |
982 | bfd_errmsg (bfd_get_error ())); | |
983 | } | |
984 | sym_bfd->cacheable = true; | |
985 | ||
986 | if (!bfd_check_format (sym_bfd, bfd_object)) | |
987 | { | |
988 | /* FIXME: should be checking for errors from bfd_close (for one thing, | |
c5aa993b JM |
989 | on error it does not free all the storage associated with the |
990 | bfd). */ | |
c906108c SS |
991 | bfd_close (sym_bfd); /* This also closes desc */ |
992 | make_cleanup (free, name); | |
993 | error ("\"%s\": can't read symbols: %s.", name, | |
994 | bfd_errmsg (bfd_get_error ())); | |
995 | } | |
996 | return (sym_bfd); | |
997 | } | |
998 | ||
999 | /* Link a new symtab_fns into the global symtab_fns list. Called on gdb | |
1000 | startup by the _initialize routine in each object file format reader, | |
1001 | to register information about each format the the reader is prepared | |
1002 | to handle. */ | |
1003 | ||
1004 | void | |
1005 | add_symtab_fns (sf) | |
1006 | struct sym_fns *sf; | |
1007 | { | |
1008 | sf->next = symtab_fns; | |
1009 | symtab_fns = sf; | |
1010 | } | |
1011 | ||
1012 | ||
1013 | /* Initialize to read symbols from the symbol file sym_bfd. It either | |
1014 | returns or calls error(). The result is an initialized struct sym_fns | |
1015 | in the objfile structure, that contains cached information about the | |
1016 | symbol file. */ | |
1017 | ||
1018 | static void | |
1019 | find_sym_fns (objfile) | |
1020 | struct objfile *objfile; | |
1021 | { | |
1022 | struct sym_fns *sf; | |
c5aa993b JM |
1023 | enum bfd_flavour our_flavour = bfd_get_flavour (objfile->obfd); |
1024 | char *our_target = bfd_get_target (objfile->obfd); | |
c906108c SS |
1025 | |
1026 | /* Special kludge for RS/6000 and PowerMac. See xcoffread.c. */ | |
1027 | if (STREQ (our_target, "aixcoff-rs6000") || | |
1028 | STREQ (our_target, "xcoff-powermac")) | |
c5aa993b | 1029 | our_flavour = (enum bfd_flavour) -1; |
c906108c SS |
1030 | |
1031 | /* Special kludge for apollo. See dstread.c. */ | |
1032 | if (STREQN (our_target, "apollo", 6)) | |
c5aa993b | 1033 | our_flavour = (enum bfd_flavour) -2; |
c906108c | 1034 | |
c5aa993b | 1035 | for (sf = symtab_fns; sf != NULL; sf = sf->next) |
c906108c | 1036 | { |
c5aa993b | 1037 | if (our_flavour == sf->sym_flavour) |
c906108c | 1038 | { |
c5aa993b | 1039 | objfile->sf = sf; |
c906108c SS |
1040 | return; |
1041 | } | |
1042 | } | |
1043 | error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.", | |
c5aa993b | 1044 | bfd_get_target (objfile->obfd)); |
c906108c SS |
1045 | } |
1046 | \f | |
1047 | /* This function runs the load command of our current target. */ | |
1048 | ||
1049 | static void | |
1050 | load_command (arg, from_tty) | |
1051 | char *arg; | |
1052 | int from_tty; | |
1053 | { | |
1054 | if (arg == NULL) | |
1055 | arg = get_exec_file (1); | |
1056 | target_load (arg, from_tty); | |
1057 | } | |
1058 | ||
1059 | /* This version of "load" should be usable for any target. Currently | |
1060 | it is just used for remote targets, not inftarg.c or core files, | |
1061 | on the theory that only in that case is it useful. | |
1062 | ||
1063 | Avoiding xmodem and the like seems like a win (a) because we don't have | |
1064 | to worry about finding it, and (b) On VMS, fork() is very slow and so | |
1065 | we don't want to run a subprocess. On the other hand, I'm not sure how | |
1066 | performance compares. */ | |
1067 | #define GENERIC_LOAD_CHUNK 256 | |
1068 | #define VALIDATE_DOWNLOAD 0 | |
1069 | void | |
1070 | generic_load (filename, from_tty) | |
c5aa993b JM |
1071 | char *filename; |
1072 | int from_tty; | |
c906108c SS |
1073 | { |
1074 | struct cleanup *old_cleanups; | |
1075 | asection *s; | |
1076 | bfd *loadfile_bfd; | |
1077 | time_t start_time, end_time; /* Start and end times of download */ | |
1078 | unsigned long data_count = 0; /* Number of bytes transferred to memory */ | |
c5aa993b JM |
1079 | int n; |
1080 | unsigned long load_offset = 0; /* offset to add to vma for each section */ | |
1081 | char buf[GENERIC_LOAD_CHUNK + 8]; | |
1082 | #if VALIDATE_DOWNLOAD | |
1083 | char verify_buffer[GENERIC_LOAD_CHUNK + 8]; | |
1084 | #endif | |
c906108c SS |
1085 | |
1086 | /* enable user to specify address for downloading as 2nd arg to load */ | |
c5aa993b JM |
1087 | n = sscanf (filename, "%s 0x%lx", buf, &load_offset); |
1088 | if (n > 1) | |
c906108c SS |
1089 | filename = buf; |
1090 | else | |
1091 | load_offset = 0; | |
1092 | ||
1093 | loadfile_bfd = bfd_openr (filename, gnutarget); | |
1094 | if (loadfile_bfd == NULL) | |
1095 | { | |
1096 | perror_with_name (filename); | |
1097 | return; | |
1098 | } | |
1099 | /* FIXME: should be checking for errors from bfd_close (for one thing, | |
1100 | on error it does not free all the storage associated with the | |
1101 | bfd). */ | |
1102 | old_cleanups = make_cleanup ((make_cleanup_func) bfd_close, loadfile_bfd); | |
1103 | ||
c5aa993b | 1104 | if (!bfd_check_format (loadfile_bfd, bfd_object)) |
c906108c SS |
1105 | { |
1106 | error ("\"%s\" is not an object file: %s", filename, | |
1107 | bfd_errmsg (bfd_get_error ())); | |
1108 | } | |
c5aa993b | 1109 | |
c906108c SS |
1110 | start_time = time (NULL); |
1111 | ||
c5aa993b JM |
1112 | for (s = loadfile_bfd->sections; s; s = s->next) |
1113 | { | |
1114 | if (s->flags & SEC_LOAD) | |
1115 | { | |
1116 | bfd_size_type size; | |
1117 | ||
1118 | size = bfd_get_section_size_before_reloc (s); | |
1119 | if (size > 0) | |
1120 | { | |
1121 | char *buffer; | |
1122 | struct cleanup *old_chain; | |
1123 | bfd_vma lma; | |
1124 | unsigned long l = size; | |
1125 | int err; | |
1126 | char *sect; | |
1127 | unsigned long sent; | |
1128 | unsigned long len; | |
1129 | ||
1130 | l = l > GENERIC_LOAD_CHUNK ? GENERIC_LOAD_CHUNK : l; | |
1131 | ||
1132 | buffer = xmalloc (size); | |
1133 | old_chain = make_cleanup (free, buffer); | |
1134 | ||
1135 | lma = s->lma; | |
1136 | lma += load_offset; | |
1137 | ||
1138 | /* Is this really necessary? I guess it gives the user something | |
1139 | to look at during a long download. */ | |
1140 | printf_filtered ("Loading section %s, size 0x%lx lma ", | |
1141 | bfd_get_section_name (loadfile_bfd, s), | |
1142 | (unsigned long) size); | |
1143 | print_address_numeric (lma, 1, gdb_stdout); | |
1144 | printf_filtered ("\n"); | |
1145 | ||
1146 | bfd_get_section_contents (loadfile_bfd, s, buffer, 0, size); | |
1147 | ||
1148 | sect = (char *) bfd_get_section_name (loadfile_bfd, s); | |
1149 | sent = 0; | |
1150 | do | |
1151 | { | |
1152 | len = (size - sent) < l ? (size - sent) : l; | |
1153 | sent += len; | |
1154 | err = target_write_memory (lma, buffer, len); | |
1155 | if (ui_load_progress_hook) | |
1156 | if (ui_load_progress_hook (sect, sent)) | |
c906108c SS |
1157 | error ("Canceled the download"); |
1158 | #if VALIDATE_DOWNLOAD | |
1159 | /* Broken memories and broken monitors manifest themselves | |
1160 | here when bring new computers to life. | |
1161 | This doubles already slow downloads. | |
c5aa993b JM |
1162 | */ |
1163 | if (err) | |
1164 | break; | |
c906108c | 1165 | { |
c5aa993b JM |
1166 | target_read_memory (lma, verify_buffer, len); |
1167 | if (0 != bcmp (buffer, verify_buffer, len)) | |
1168 | error ("Download verify failed at %08x", | |
1169 | (unsigned long) lma); | |
c906108c SS |
1170 | } |
1171 | ||
1172 | #endif | |
c5aa993b JM |
1173 | data_count += len; |
1174 | lma += len; | |
1175 | buffer += len; | |
1176 | } /* od */ | |
1177 | while (err == 0 && sent < size); | |
1178 | ||
1179 | if (err != 0) | |
1180 | error ("Memory access error while loading section %s.", | |
1181 | bfd_get_section_name (loadfile_bfd, s)); | |
c906108c | 1182 | |
c5aa993b JM |
1183 | do_cleanups (old_chain); |
1184 | } | |
1185 | } | |
c906108c SS |
1186 | } |
1187 | ||
1188 | end_time = time (NULL); | |
1189 | { | |
c5aa993b JM |
1190 | unsigned long entry; |
1191 | entry = bfd_get_start_address (loadfile_bfd); | |
d4f3574e | 1192 | printf_filtered ("Start address 0x%lx , load size %ld\n", entry, data_count); |
c906108c SS |
1193 | /* We were doing this in remote-mips.c, I suspect it is right |
1194 | for other targets too. */ | |
1195 | write_pc (entry); | |
1196 | } | |
1197 | ||
1198 | /* FIXME: are we supposed to call symbol_file_add or not? According to | |
1199 | a comment from remote-mips.c (where a call to symbol_file_add was | |
1200 | commented out), making the call confuses GDB if more than one file is | |
1201 | loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c | |
1202 | does. */ | |
1203 | ||
1204 | report_transfer_performance (data_count, start_time, end_time); | |
1205 | ||
1206 | do_cleanups (old_cleanups); | |
1207 | } | |
1208 | ||
1209 | /* Report how fast the transfer went. */ | |
1210 | ||
1211 | void | |
1212 | report_transfer_performance (data_count, start_time, end_time) | |
c5aa993b JM |
1213 | unsigned long data_count; |
1214 | time_t start_time, end_time; | |
c906108c SS |
1215 | { |
1216 | printf_filtered ("Transfer rate: "); | |
1217 | if (end_time != start_time) | |
d4f3574e | 1218 | printf_filtered ("%ld bits/sec", |
c906108c SS |
1219 | (data_count * 8) / (end_time - start_time)); |
1220 | else | |
d4f3574e | 1221 | printf_filtered ("%ld bits in <1 sec", (data_count * 8)); |
c906108c SS |
1222 | printf_filtered (".\n"); |
1223 | } | |
1224 | ||
1225 | /* This function allows the addition of incrementally linked object files. | |
1226 | It does not modify any state in the target, only in the debugger. */ | |
1227 | ||
1228 | /* ARGSUSED */ | |
1229 | static void | |
1230 | add_symbol_file_command (args, from_tty) | |
1231 | char *args; | |
1232 | int from_tty; | |
1233 | { | |
1234 | char *name = NULL; | |
1235 | CORE_ADDR text_addr; | |
1236 | char *arg; | |
1237 | int readnow = 0; | |
1238 | int mapped = 0; | |
c5aa993b | 1239 | |
c906108c SS |
1240 | dont_repeat (); |
1241 | ||
1242 | if (args == NULL) | |
1243 | { | |
1244 | error ("add-symbol-file takes a file name and an address"); | |
1245 | } | |
1246 | ||
1247 | /* Make a copy of the string that we can safely write into. */ | |
1248 | ||
1249 | args = strdup (args); | |
1250 | make_cleanup (free, args); | |
1251 | ||
1252 | /* Pick off any -option args and the file name. */ | |
1253 | ||
1254 | while ((*args != '\000') && (name == NULL)) | |
1255 | { | |
c5aa993b JM |
1256 | while (isspace (*args)) |
1257 | { | |
1258 | args++; | |
1259 | } | |
c906108c | 1260 | arg = args; |
c5aa993b JM |
1261 | while ((*args != '\000') && !isspace (*args)) |
1262 | { | |
1263 | args++; | |
1264 | } | |
c906108c SS |
1265 | if (*args != '\000') |
1266 | { | |
1267 | *args++ = '\000'; | |
1268 | } | |
1269 | if (*arg != '-') | |
1270 | { | |
1271 | name = arg; | |
1272 | } | |
1273 | else if (STREQ (arg, "-mapped")) | |
1274 | { | |
1275 | mapped = 1; | |
1276 | } | |
1277 | else if (STREQ (arg, "-readnow")) | |
1278 | { | |
1279 | readnow = 1; | |
1280 | } | |
1281 | else | |
1282 | { | |
1283 | error ("unknown option `%s'", arg); | |
1284 | } | |
1285 | } | |
1286 | ||
1287 | /* After picking off any options and the file name, args should be | |
1288 | left pointing at the remainder of the command line, which should | |
1289 | be the address expression to evaluate. */ | |
1290 | ||
1291 | if (name == NULL) | |
1292 | { | |
1293 | error ("add-symbol-file takes a file name"); | |
1294 | } | |
1295 | name = tilde_expand (name); | |
1296 | make_cleanup (free, name); | |
1297 | ||
1298 | if (*args != '\000') | |
1299 | { | |
1300 | text_addr = parse_and_eval_address (args); | |
1301 | } | |
1302 | else | |
1303 | { | |
c5aa993b | 1304 | target_link (name, &text_addr); |
a0b3c4fd | 1305 | if (text_addr == (CORE_ADDR) -1) |
c5aa993b | 1306 | error ("Don't know how to get text start location for this file"); |
c906108c SS |
1307 | } |
1308 | ||
1309 | /* FIXME-32x64: Assumes text_addr fits in a long. */ | |
1310 | if ((from_tty) | |
1311 | && (!query ("add symbol table from file \"%s\" at text_addr = %s?\n", | |
c5aa993b | 1312 | name, local_hex_string ((unsigned long) text_addr)))) |
c906108c SS |
1313 | error ("Not confirmed."); |
1314 | ||
1315 | symbol_file_add (name, from_tty, text_addr, 0, mapped, readnow, | |
c5aa993b JM |
1316 | 1, /* user_loaded */ |
1317 | 0); /* We'll guess it's ! is_solib */ | |
c906108c SS |
1318 | |
1319 | /* Getting new symbols may change our opinion about what is | |
1320 | frameless. */ | |
1321 | reinit_frame_cache (); | |
1322 | } | |
1323 | \f | |
1324 | static void | |
c5aa993b | 1325 | add_shared_symbol_files_command (args, from_tty) |
c906108c SS |
1326 | char *args; |
1327 | int from_tty; | |
1328 | { | |
1329 | #ifdef ADD_SHARED_SYMBOL_FILES | |
1330 | ADD_SHARED_SYMBOL_FILES (args, from_tty); | |
1331 | #else | |
1332 | error ("This command is not available in this configuration of GDB."); | |
c5aa993b | 1333 | #endif |
c906108c SS |
1334 | } |
1335 | \f | |
1336 | /* Re-read symbols if a symbol-file has changed. */ | |
1337 | void | |
1338 | reread_symbols () | |
1339 | { | |
1340 | struct objfile *objfile; | |
1341 | long new_modtime; | |
1342 | int reread_one = 0; | |
1343 | struct stat new_statbuf; | |
1344 | int res; | |
1345 | ||
1346 | /* With the addition of shared libraries, this should be modified, | |
1347 | the load time should be saved in the partial symbol tables, since | |
1348 | different tables may come from different source files. FIXME. | |
1349 | This routine should then walk down each partial symbol table | |
1350 | and see if the symbol table that it originates from has been changed */ | |
1351 | ||
c5aa993b JM |
1352 | for (objfile = object_files; objfile; objfile = objfile->next) |
1353 | { | |
1354 | if (objfile->obfd) | |
1355 | { | |
c906108c | 1356 | #ifdef IBM6000_TARGET |
c5aa993b JM |
1357 | /* If this object is from a shared library, then you should |
1358 | stat on the library name, not member name. */ | |
c906108c | 1359 | |
c5aa993b JM |
1360 | if (objfile->obfd->my_archive) |
1361 | res = stat (objfile->obfd->my_archive->filename, &new_statbuf); | |
1362 | else | |
c906108c | 1363 | #endif |
c5aa993b JM |
1364 | res = stat (objfile->name, &new_statbuf); |
1365 | if (res != 0) | |
c906108c | 1366 | { |
c5aa993b JM |
1367 | /* FIXME, should use print_sys_errmsg but it's not filtered. */ |
1368 | printf_filtered ("`%s' has disappeared; keeping its symbols.\n", | |
1369 | objfile->name); | |
1370 | continue; | |
c906108c | 1371 | } |
c5aa993b JM |
1372 | new_modtime = new_statbuf.st_mtime; |
1373 | if (new_modtime != objfile->mtime) | |
c906108c | 1374 | { |
c5aa993b JM |
1375 | struct cleanup *old_cleanups; |
1376 | struct section_offsets *offsets; | |
1377 | int num_offsets; | |
c5aa993b JM |
1378 | char *obfd_filename; |
1379 | ||
1380 | printf_filtered ("`%s' has changed; re-reading symbols.\n", | |
1381 | objfile->name); | |
1382 | ||
1383 | /* There are various functions like symbol_file_add, | |
1384 | symfile_bfd_open, syms_from_objfile, etc., which might | |
1385 | appear to do what we want. But they have various other | |
1386 | effects which we *don't* want. So we just do stuff | |
1387 | ourselves. We don't worry about mapped files (for one thing, | |
1388 | any mapped file will be out of date). */ | |
1389 | ||
1390 | /* If we get an error, blow away this objfile (not sure if | |
1391 | that is the correct response for things like shared | |
1392 | libraries). */ | |
1393 | old_cleanups = make_cleanup ((make_cleanup_func) free_objfile, | |
1394 | objfile); | |
1395 | /* We need to do this whenever any symbols go away. */ | |
1396 | make_cleanup ((make_cleanup_func) clear_symtab_users, 0); | |
1397 | ||
1398 | /* Clean up any state BFD has sitting around. We don't need | |
1399 | to close the descriptor but BFD lacks a way of closing the | |
1400 | BFD without closing the descriptor. */ | |
1401 | obfd_filename = bfd_get_filename (objfile->obfd); | |
1402 | if (!bfd_close (objfile->obfd)) | |
1403 | error ("Can't close BFD for %s: %s", objfile->name, | |
1404 | bfd_errmsg (bfd_get_error ())); | |
1405 | objfile->obfd = bfd_openr (obfd_filename, gnutarget); | |
1406 | if (objfile->obfd == NULL) | |
1407 | error ("Can't open %s to read symbols.", objfile->name); | |
1408 | /* bfd_openr sets cacheable to true, which is what we want. */ | |
1409 | if (!bfd_check_format (objfile->obfd, bfd_object)) | |
1410 | error ("Can't read symbols from %s: %s.", objfile->name, | |
1411 | bfd_errmsg (bfd_get_error ())); | |
1412 | ||
1413 | /* Save the offsets, we will nuke them with the rest of the | |
1414 | psymbol_obstack. */ | |
1415 | num_offsets = objfile->num_sections; | |
d4f3574e SS |
1416 | offsets = (struct section_offsets *) alloca (SIZEOF_SECTION_OFFSETS); |
1417 | memcpy (offsets, objfile->section_offsets, SIZEOF_SECTION_OFFSETS); | |
c5aa993b JM |
1418 | |
1419 | /* Nuke all the state that we will re-read. Much of the following | |
1420 | code which sets things to NULL really is necessary to tell | |
1421 | other parts of GDB that there is nothing currently there. */ | |
1422 | ||
1423 | /* FIXME: Do we have to free a whole linked list, or is this | |
1424 | enough? */ | |
1425 | if (objfile->global_psymbols.list) | |
1426 | mfree (objfile->md, objfile->global_psymbols.list); | |
1427 | memset (&objfile->global_psymbols, 0, | |
1428 | sizeof (objfile->global_psymbols)); | |
1429 | if (objfile->static_psymbols.list) | |
1430 | mfree (objfile->md, objfile->static_psymbols.list); | |
1431 | memset (&objfile->static_psymbols, 0, | |
1432 | sizeof (objfile->static_psymbols)); | |
1433 | ||
1434 | /* Free the obstacks for non-reusable objfiles */ | |
1435 | obstack_free (&objfile->psymbol_cache.cache, 0); | |
1436 | memset (&objfile->psymbol_cache, 0, | |
1437 | sizeof (objfile->psymbol_cache)); | |
1438 | obstack_free (&objfile->psymbol_obstack, 0); | |
1439 | obstack_free (&objfile->symbol_obstack, 0); | |
1440 | obstack_free (&objfile->type_obstack, 0); | |
1441 | objfile->sections = NULL; | |
1442 | objfile->symtabs = NULL; | |
1443 | objfile->psymtabs = NULL; | |
1444 | objfile->free_psymtabs = NULL; | |
1445 | objfile->msymbols = NULL; | |
1446 | objfile->minimal_symbol_count = 0; | |
1447 | objfile->fundamental_types = NULL; | |
1448 | if (objfile->sf != NULL) | |
1449 | { | |
1450 | (*objfile->sf->sym_finish) (objfile); | |
1451 | } | |
1452 | ||
1453 | /* We never make this a mapped file. */ | |
1454 | objfile->md = NULL; | |
1455 | /* obstack_specify_allocation also initializes the obstack so | |
1456 | it is empty. */ | |
1457 | obstack_specify_allocation (&objfile->psymbol_cache.cache, 0, 0, | |
1458 | xmalloc, free); | |
1459 | obstack_specify_allocation (&objfile->psymbol_obstack, 0, 0, | |
1460 | xmalloc, free); | |
1461 | obstack_specify_allocation (&objfile->symbol_obstack, 0, 0, | |
1462 | xmalloc, free); | |
1463 | obstack_specify_allocation (&objfile->type_obstack, 0, 0, | |
1464 | xmalloc, free); | |
1465 | if (build_objfile_section_table (objfile)) | |
1466 | { | |
1467 | error ("Can't find the file sections in `%s': %s", | |
1468 | objfile->name, bfd_errmsg (bfd_get_error ())); | |
1469 | } | |
1470 | ||
1471 | /* We use the same section offsets as from last time. I'm not | |
1472 | sure whether that is always correct for shared libraries. */ | |
1473 | objfile->section_offsets = (struct section_offsets *) | |
d4f3574e SS |
1474 | obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS); |
1475 | memcpy (objfile->section_offsets, offsets, SIZEOF_SECTION_OFFSETS); | |
c5aa993b JM |
1476 | objfile->num_sections = num_offsets; |
1477 | ||
1478 | /* What the hell is sym_new_init for, anyway? The concept of | |
1479 | distinguishing between the main file and additional files | |
1480 | in this way seems rather dubious. */ | |
1481 | if (objfile == symfile_objfile) | |
1482 | { | |
1483 | (*objfile->sf->sym_new_init) (objfile); | |
c906108c | 1484 | #ifdef HPUXHPPA |
c5aa993b | 1485 | RESET_HP_UX_GLOBALS (); |
c906108c | 1486 | #endif |
c5aa993b JM |
1487 | } |
1488 | ||
1489 | (*objfile->sf->sym_init) (objfile); | |
1490 | clear_complaints (1, 1); | |
1491 | /* The "mainline" parameter is a hideous hack; I think leaving it | |
1492 | zero is OK since dbxread.c also does what it needs to do if | |
1493 | objfile->global_psymbols.size is 0. */ | |
96baa820 | 1494 | (*objfile->sf->sym_read) (objfile, 0); |
c5aa993b JM |
1495 | if (!have_partial_symbols () && !have_full_symbols ()) |
1496 | { | |
1497 | wrap_here (""); | |
1498 | printf_filtered ("(no debugging symbols found)\n"); | |
1499 | wrap_here (""); | |
1500 | } | |
1501 | objfile->flags |= OBJF_SYMS; | |
1502 | ||
1503 | /* We're done reading the symbol file; finish off complaints. */ | |
1504 | clear_complaints (0, 1); | |
c906108c | 1505 | |
c5aa993b JM |
1506 | /* Getting new symbols may change our opinion about what is |
1507 | frameless. */ | |
c906108c | 1508 | |
c5aa993b | 1509 | reinit_frame_cache (); |
c906108c | 1510 | |
c5aa993b JM |
1511 | /* Discard cleanups as symbol reading was successful. */ |
1512 | discard_cleanups (old_cleanups); | |
c906108c | 1513 | |
c5aa993b JM |
1514 | /* If the mtime has changed between the time we set new_modtime |
1515 | and now, we *want* this to be out of date, so don't call stat | |
1516 | again now. */ | |
1517 | objfile->mtime = new_modtime; | |
1518 | reread_one = 1; | |
c906108c | 1519 | |
c5aa993b JM |
1520 | /* Call this after reading in a new symbol table to give target |
1521 | dependant code a crack at the new symbols. For instance, this | |
1522 | could be used to update the values of target-specific symbols GDB | |
1523 | needs to keep track of (such as _sigtramp, or whatever). */ | |
c906108c | 1524 | |
c5aa993b JM |
1525 | TARGET_SYMFILE_POSTREAD (objfile); |
1526 | } | |
c906108c SS |
1527 | } |
1528 | } | |
c906108c SS |
1529 | |
1530 | if (reread_one) | |
1531 | clear_symtab_users (); | |
1532 | } | |
c906108c SS |
1533 | \f |
1534 | ||
c5aa993b JM |
1535 | |
1536 | typedef struct | |
1537 | { | |
1538 | char *ext; | |
c906108c | 1539 | enum language lang; |
c5aa993b JM |
1540 | } |
1541 | filename_language; | |
c906108c | 1542 | |
c5aa993b | 1543 | static filename_language *filename_language_table; |
c906108c SS |
1544 | static int fl_table_size, fl_table_next; |
1545 | ||
1546 | static void | |
1547 | add_filename_language (ext, lang) | |
c5aa993b | 1548 | char *ext; |
c906108c SS |
1549 | enum language lang; |
1550 | { | |
1551 | if (fl_table_next >= fl_table_size) | |
1552 | { | |
1553 | fl_table_size += 10; | |
c5aa993b | 1554 | filename_language_table = realloc (filename_language_table, |
c906108c SS |
1555 | fl_table_size); |
1556 | } | |
1557 | ||
c5aa993b | 1558 | filename_language_table[fl_table_next].ext = strsave (ext); |
c906108c SS |
1559 | filename_language_table[fl_table_next].lang = lang; |
1560 | fl_table_next++; | |
1561 | } | |
1562 | ||
1563 | static char *ext_args; | |
1564 | ||
1565 | static void | |
1566 | set_ext_lang_command (args, from_tty) | |
1567 | char *args; | |
1568 | int from_tty; | |
1569 | { | |
1570 | int i; | |
1571 | char *cp = ext_args; | |
1572 | enum language lang; | |
1573 | ||
1574 | /* First arg is filename extension, starting with '.' */ | |
1575 | if (*cp != '.') | |
1576 | error ("'%s': Filename extension must begin with '.'", ext_args); | |
1577 | ||
1578 | /* Find end of first arg. */ | |
c5aa993b | 1579 | while (*cp && !isspace (*cp)) |
c906108c SS |
1580 | cp++; |
1581 | ||
1582 | if (*cp == '\0') | |
1583 | error ("'%s': two arguments required -- filename extension and language", | |
1584 | ext_args); | |
1585 | ||
1586 | /* Null-terminate first arg */ | |
c5aa993b | 1587 | *cp++ = '\0'; |
c906108c SS |
1588 | |
1589 | /* Find beginning of second arg, which should be a source language. */ | |
1590 | while (*cp && isspace (*cp)) | |
1591 | cp++; | |
1592 | ||
1593 | if (*cp == '\0') | |
1594 | error ("'%s': two arguments required -- filename extension and language", | |
1595 | ext_args); | |
1596 | ||
1597 | /* Lookup the language from among those we know. */ | |
1598 | lang = language_enum (cp); | |
1599 | ||
1600 | /* Now lookup the filename extension: do we already know it? */ | |
1601 | for (i = 0; i < fl_table_next; i++) | |
1602 | if (0 == strcmp (ext_args, filename_language_table[i].ext)) | |
1603 | break; | |
1604 | ||
1605 | if (i >= fl_table_next) | |
1606 | { | |
1607 | /* new file extension */ | |
1608 | add_filename_language (ext_args, lang); | |
1609 | } | |
1610 | else | |
1611 | { | |
1612 | /* redefining a previously known filename extension */ | |
1613 | ||
1614 | /* if (from_tty) */ | |
1615 | /* query ("Really make files of type %s '%s'?", */ | |
1616 | /* ext_args, language_str (lang)); */ | |
1617 | ||
1618 | free (filename_language_table[i].ext); | |
c5aa993b | 1619 | filename_language_table[i].ext = strsave (ext_args); |
c906108c SS |
1620 | filename_language_table[i].lang = lang; |
1621 | } | |
1622 | } | |
1623 | ||
1624 | static void | |
1625 | info_ext_lang_command (args, from_tty) | |
1626 | char *args; | |
c5aa993b | 1627 | int from_tty; |
c906108c SS |
1628 | { |
1629 | int i; | |
1630 | ||
1631 | printf_filtered ("Filename extensions and the languages they represent:"); | |
1632 | printf_filtered ("\n\n"); | |
1633 | for (i = 0; i < fl_table_next; i++) | |
c5aa993b JM |
1634 | printf_filtered ("\t%s\t- %s\n", |
1635 | filename_language_table[i].ext, | |
c906108c SS |
1636 | language_str (filename_language_table[i].lang)); |
1637 | } | |
1638 | ||
1639 | static void | |
1640 | init_filename_language_table () | |
1641 | { | |
1642 | if (fl_table_size == 0) /* protect against repetition */ | |
1643 | { | |
1644 | fl_table_size = 20; | |
1645 | fl_table_next = 0; | |
c5aa993b | 1646 | filename_language_table = |
c906108c | 1647 | xmalloc (fl_table_size * sizeof (*filename_language_table)); |
c5aa993b JM |
1648 | add_filename_language (".c", language_c); |
1649 | add_filename_language (".C", language_cplus); | |
1650 | add_filename_language (".cc", language_cplus); | |
1651 | add_filename_language (".cp", language_cplus); | |
1652 | add_filename_language (".cpp", language_cplus); | |
1653 | add_filename_language (".cxx", language_cplus); | |
1654 | add_filename_language (".c++", language_cplus); | |
1655 | add_filename_language (".java", language_java); | |
c906108c | 1656 | add_filename_language (".class", language_java); |
c5aa993b JM |
1657 | add_filename_language (".ch", language_chill); |
1658 | add_filename_language (".c186", language_chill); | |
1659 | add_filename_language (".c286", language_chill); | |
1660 | add_filename_language (".f", language_fortran); | |
1661 | add_filename_language (".F", language_fortran); | |
1662 | add_filename_language (".s", language_asm); | |
1663 | add_filename_language (".S", language_asm); | |
c906108c SS |
1664 | } |
1665 | } | |
1666 | ||
1667 | enum language | |
1668 | deduce_language_from_filename (filename) | |
1669 | char *filename; | |
1670 | { | |
1671 | int i; | |
1672 | char *cp; | |
1673 | ||
1674 | if (filename != NULL) | |
1675 | if ((cp = strrchr (filename, '.')) != NULL) | |
1676 | for (i = 0; i < fl_table_next; i++) | |
1677 | if (strcmp (cp, filename_language_table[i].ext) == 0) | |
1678 | return filename_language_table[i].lang; | |
1679 | ||
1680 | return language_unknown; | |
1681 | } | |
1682 | \f | |
1683 | /* allocate_symtab: | |
1684 | ||
1685 | Allocate and partly initialize a new symbol table. Return a pointer | |
1686 | to it. error() if no space. | |
1687 | ||
1688 | Caller must set these fields: | |
c5aa993b JM |
1689 | LINETABLE(symtab) |
1690 | symtab->blockvector | |
1691 | symtab->dirname | |
1692 | symtab->free_code | |
1693 | symtab->free_ptr | |
1694 | possibly free_named_symtabs (symtab->filename); | |
c906108c SS |
1695 | */ |
1696 | ||
1697 | struct symtab * | |
1698 | allocate_symtab (filename, objfile) | |
1699 | char *filename; | |
1700 | struct objfile *objfile; | |
1701 | { | |
1702 | register struct symtab *symtab; | |
1703 | ||
1704 | symtab = (struct symtab *) | |
c5aa993b | 1705 | obstack_alloc (&objfile->symbol_obstack, sizeof (struct symtab)); |
c906108c | 1706 | memset (symtab, 0, sizeof (*symtab)); |
c5aa993b JM |
1707 | symtab->filename = obsavestring (filename, strlen (filename), |
1708 | &objfile->symbol_obstack); | |
1709 | symtab->fullname = NULL; | |
1710 | symtab->language = deduce_language_from_filename (filename); | |
1711 | symtab->debugformat = obsavestring ("unknown", 7, | |
1712 | &objfile->symbol_obstack); | |
c906108c SS |
1713 | |
1714 | /* Hook it to the objfile it comes from */ | |
1715 | ||
c5aa993b JM |
1716 | symtab->objfile = objfile; |
1717 | symtab->next = objfile->symtabs; | |
1718 | objfile->symtabs = symtab; | |
c906108c SS |
1719 | |
1720 | /* FIXME: This should go away. It is only defined for the Z8000, | |
1721 | and the Z8000 definition of this macro doesn't have anything to | |
1722 | do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just | |
1723 | here for convenience. */ | |
1724 | #ifdef INIT_EXTRA_SYMTAB_INFO | |
1725 | INIT_EXTRA_SYMTAB_INFO (symtab); | |
1726 | #endif | |
1727 | ||
1728 | return (symtab); | |
1729 | } | |
1730 | ||
1731 | struct partial_symtab * | |
1732 | allocate_psymtab (filename, objfile) | |
1733 | char *filename; | |
1734 | struct objfile *objfile; | |
1735 | { | |
1736 | struct partial_symtab *psymtab; | |
1737 | ||
c5aa993b | 1738 | if (objfile->free_psymtabs) |
c906108c | 1739 | { |
c5aa993b JM |
1740 | psymtab = objfile->free_psymtabs; |
1741 | objfile->free_psymtabs = psymtab->next; | |
c906108c SS |
1742 | } |
1743 | else | |
1744 | psymtab = (struct partial_symtab *) | |
c5aa993b | 1745 | obstack_alloc (&objfile->psymbol_obstack, |
c906108c SS |
1746 | sizeof (struct partial_symtab)); |
1747 | ||
1748 | memset (psymtab, 0, sizeof (struct partial_symtab)); | |
c5aa993b JM |
1749 | psymtab->filename = obsavestring (filename, strlen (filename), |
1750 | &objfile->psymbol_obstack); | |
1751 | psymtab->symtab = NULL; | |
c906108c SS |
1752 | |
1753 | /* Prepend it to the psymtab list for the objfile it belongs to. | |
1754 | Psymtabs are searched in most recent inserted -> least recent | |
1755 | inserted order. */ | |
1756 | ||
c5aa993b JM |
1757 | psymtab->objfile = objfile; |
1758 | psymtab->next = objfile->psymtabs; | |
1759 | objfile->psymtabs = psymtab; | |
c906108c SS |
1760 | #if 0 |
1761 | { | |
1762 | struct partial_symtab **prev_pst; | |
c5aa993b JM |
1763 | psymtab->objfile = objfile; |
1764 | psymtab->next = NULL; | |
1765 | prev_pst = &(objfile->psymtabs); | |
c906108c | 1766 | while ((*prev_pst) != NULL) |
c5aa993b | 1767 | prev_pst = &((*prev_pst)->next); |
c906108c | 1768 | (*prev_pst) = psymtab; |
c5aa993b | 1769 | } |
c906108c | 1770 | #endif |
c5aa993b | 1771 | |
c906108c SS |
1772 | return (psymtab); |
1773 | } | |
1774 | ||
1775 | void | |
1776 | discard_psymtab (pst) | |
1777 | struct partial_symtab *pst; | |
1778 | { | |
1779 | struct partial_symtab **prev_pst; | |
1780 | ||
1781 | /* From dbxread.c: | |
1782 | Empty psymtabs happen as a result of header files which don't | |
1783 | have any symbols in them. There can be a lot of them. But this | |
1784 | check is wrong, in that a psymtab with N_SLINE entries but | |
1785 | nothing else is not empty, but we don't realize that. Fixing | |
1786 | that without slowing things down might be tricky. */ | |
1787 | ||
1788 | /* First, snip it out of the psymtab chain */ | |
1789 | ||
1790 | prev_pst = &(pst->objfile->psymtabs); | |
1791 | while ((*prev_pst) != pst) | |
1792 | prev_pst = &((*prev_pst)->next); | |
1793 | (*prev_pst) = pst->next; | |
1794 | ||
1795 | /* Next, put it on a free list for recycling */ | |
1796 | ||
1797 | pst->next = pst->objfile->free_psymtabs; | |
1798 | pst->objfile->free_psymtabs = pst; | |
1799 | } | |
c906108c | 1800 | \f |
c5aa993b | 1801 | |
c906108c SS |
1802 | /* Reset all data structures in gdb which may contain references to symbol |
1803 | table data. */ | |
1804 | ||
1805 | void | |
1806 | clear_symtab_users () | |
1807 | { | |
1808 | /* Someday, we should do better than this, by only blowing away | |
1809 | the things that really need to be blown. */ | |
1810 | clear_value_history (); | |
1811 | clear_displays (); | |
1812 | clear_internalvars (); | |
1813 | breakpoint_re_set (); | |
1814 | set_default_breakpoint (0, 0, 0, 0); | |
1815 | current_source_symtab = 0; | |
1816 | current_source_line = 0; | |
1817 | clear_pc_function_cache (); | |
1818 | target_new_objfile (NULL); | |
1819 | } | |
1820 | ||
1821 | /* clear_symtab_users_once: | |
1822 | ||
1823 | This function is run after symbol reading, or from a cleanup. | |
1824 | If an old symbol table was obsoleted, the old symbol table | |
1825 | has been blown away, but the other GDB data structures that may | |
1826 | reference it have not yet been cleared or re-directed. (The old | |
1827 | symtab was zapped, and the cleanup queued, in free_named_symtab() | |
1828 | below.) | |
1829 | ||
1830 | This function can be queued N times as a cleanup, or called | |
1831 | directly; it will do all the work the first time, and then will be a | |
1832 | no-op until the next time it is queued. This works by bumping a | |
1833 | counter at queueing time. Much later when the cleanup is run, or at | |
1834 | the end of symbol processing (in case the cleanup is discarded), if | |
1835 | the queued count is greater than the "done-count", we do the work | |
1836 | and set the done-count to the queued count. If the queued count is | |
1837 | less than or equal to the done-count, we just ignore the call. This | |
1838 | is needed because reading a single .o file will often replace many | |
1839 | symtabs (one per .h file, for example), and we don't want to reset | |
1840 | the breakpoints N times in the user's face. | |
1841 | ||
1842 | The reason we both queue a cleanup, and call it directly after symbol | |
1843 | reading, is because the cleanup protects us in case of errors, but is | |
1844 | discarded if symbol reading is successful. */ | |
1845 | ||
1846 | #if 0 | |
1847 | /* FIXME: As free_named_symtabs is currently a big noop this function | |
1848 | is no longer needed. */ | |
1849 | static void | |
1850 | clear_symtab_users_once PARAMS ((void)); | |
1851 | ||
1852 | static int clear_symtab_users_queued; | |
1853 | static int clear_symtab_users_done; | |
1854 | ||
1855 | static void | |
1856 | clear_symtab_users_once () | |
1857 | { | |
1858 | /* Enforce once-per-`do_cleanups'-semantics */ | |
1859 | if (clear_symtab_users_queued <= clear_symtab_users_done) | |
1860 | return; | |
1861 | clear_symtab_users_done = clear_symtab_users_queued; | |
1862 | ||
1863 | clear_symtab_users (); | |
1864 | } | |
1865 | #endif | |
1866 | ||
1867 | /* Delete the specified psymtab, and any others that reference it. */ | |
1868 | ||
1869 | static void | |
1870 | cashier_psymtab (pst) | |
1871 | struct partial_symtab *pst; | |
1872 | { | |
1873 | struct partial_symtab *ps, *pprev = NULL; | |
1874 | int i; | |
1875 | ||
1876 | /* Find its previous psymtab in the chain */ | |
c5aa993b JM |
1877 | for (ps = pst->objfile->psymtabs; ps; ps = ps->next) |
1878 | { | |
1879 | if (ps == pst) | |
1880 | break; | |
1881 | pprev = ps; | |
1882 | } | |
c906108c | 1883 | |
c5aa993b JM |
1884 | if (ps) |
1885 | { | |
1886 | /* Unhook it from the chain. */ | |
1887 | if (ps == pst->objfile->psymtabs) | |
1888 | pst->objfile->psymtabs = ps->next; | |
1889 | else | |
1890 | pprev->next = ps->next; | |
1891 | ||
1892 | /* FIXME, we can't conveniently deallocate the entries in the | |
1893 | partial_symbol lists (global_psymbols/static_psymbols) that | |
1894 | this psymtab points to. These just take up space until all | |
1895 | the psymtabs are reclaimed. Ditto the dependencies list and | |
1896 | filename, which are all in the psymbol_obstack. */ | |
1897 | ||
1898 | /* We need to cashier any psymtab that has this one as a dependency... */ | |
1899 | again: | |
1900 | for (ps = pst->objfile->psymtabs; ps; ps = ps->next) | |
1901 | { | |
1902 | for (i = 0; i < ps->number_of_dependencies; i++) | |
1903 | { | |
1904 | if (ps->dependencies[i] == pst) | |
1905 | { | |
1906 | cashier_psymtab (ps); | |
1907 | goto again; /* Must restart, chain has been munged. */ | |
1908 | } | |
1909 | } | |
c906108c | 1910 | } |
c906108c | 1911 | } |
c906108c SS |
1912 | } |
1913 | ||
1914 | /* If a symtab or psymtab for filename NAME is found, free it along | |
1915 | with any dependent breakpoints, displays, etc. | |
1916 | Used when loading new versions of object modules with the "add-file" | |
1917 | command. This is only called on the top-level symtab or psymtab's name; | |
1918 | it is not called for subsidiary files such as .h files. | |
1919 | ||
1920 | Return value is 1 if we blew away the environment, 0 if not. | |
1921 | FIXME. The return valu appears to never be used. | |
1922 | ||
1923 | FIXME. I think this is not the best way to do this. We should | |
1924 | work on being gentler to the environment while still cleaning up | |
1925 | all stray pointers into the freed symtab. */ | |
1926 | ||
1927 | int | |
1928 | free_named_symtabs (name) | |
1929 | char *name; | |
1930 | { | |
1931 | #if 0 | |
1932 | /* FIXME: With the new method of each objfile having it's own | |
1933 | psymtab list, this function needs serious rethinking. In particular, | |
1934 | why was it ever necessary to toss psymtabs with specific compilation | |
1935 | unit filenames, as opposed to all psymtabs from a particular symbol | |
1936 | file? -- fnf | |
1937 | Well, the answer is that some systems permit reloading of particular | |
1938 | compilation units. We want to blow away any old info about these | |
1939 | compilation units, regardless of which objfiles they arrived in. --gnu. */ | |
1940 | ||
1941 | register struct symtab *s; | |
1942 | register struct symtab *prev; | |
1943 | register struct partial_symtab *ps; | |
1944 | struct blockvector *bv; | |
1945 | int blewit = 0; | |
1946 | ||
1947 | /* We only wack things if the symbol-reload switch is set. */ | |
1948 | if (!symbol_reloading) | |
1949 | return 0; | |
1950 | ||
1951 | /* Some symbol formats have trouble providing file names... */ | |
1952 | if (name == 0 || *name == '\0') | |
1953 | return 0; | |
1954 | ||
1955 | /* Look for a psymtab with the specified name. */ | |
1956 | ||
1957 | again2: | |
c5aa993b JM |
1958 | for (ps = partial_symtab_list; ps; ps = ps->next) |
1959 | { | |
1960 | if (STREQ (name, ps->filename)) | |
1961 | { | |
1962 | cashier_psymtab (ps); /* Blow it away...and its little dog, too. */ | |
1963 | goto again2; /* Must restart, chain has been munged */ | |
1964 | } | |
c906108c | 1965 | } |
c906108c SS |
1966 | |
1967 | /* Look for a symtab with the specified name. */ | |
1968 | ||
1969 | for (s = symtab_list; s; s = s->next) | |
1970 | { | |
1971 | if (STREQ (name, s->filename)) | |
1972 | break; | |
1973 | prev = s; | |
1974 | } | |
1975 | ||
1976 | if (s) | |
1977 | { | |
1978 | if (s == symtab_list) | |
1979 | symtab_list = s->next; | |
1980 | else | |
1981 | prev->next = s->next; | |
1982 | ||
1983 | /* For now, queue a delete for all breakpoints, displays, etc., whether | |
c5aa993b JM |
1984 | or not they depend on the symtab being freed. This should be |
1985 | changed so that only those data structures affected are deleted. */ | |
c906108c SS |
1986 | |
1987 | /* But don't delete anything if the symtab is empty. | |
c5aa993b JM |
1988 | This test is necessary due to a bug in "dbxread.c" that |
1989 | causes empty symtabs to be created for N_SO symbols that | |
1990 | contain the pathname of the object file. (This problem | |
1991 | has been fixed in GDB 3.9x). */ | |
c906108c SS |
1992 | |
1993 | bv = BLOCKVECTOR (s); | |
1994 | if (BLOCKVECTOR_NBLOCKS (bv) > 2 | |
1995 | || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) | |
1996 | || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK))) | |
1997 | { | |
1998 | complain (&oldsyms_complaint, name); | |
1999 | ||
2000 | clear_symtab_users_queued++; | |
2001 | make_cleanup (clear_symtab_users_once, 0); | |
2002 | blewit = 1; | |
c5aa993b JM |
2003 | } |
2004 | else | |
2005 | { | |
c906108c SS |
2006 | complain (&empty_symtab_complaint, name); |
2007 | } | |
2008 | ||
2009 | free_symtab (s); | |
2010 | } | |
2011 | else | |
2012 | { | |
2013 | /* It is still possible that some breakpoints will be affected | |
c5aa993b JM |
2014 | even though no symtab was found, since the file might have |
2015 | been compiled without debugging, and hence not be associated | |
2016 | with a symtab. In order to handle this correctly, we would need | |
2017 | to keep a list of text address ranges for undebuggable files. | |
2018 | For now, we do nothing, since this is a fairly obscure case. */ | |
c906108c SS |
2019 | ; |
2020 | } | |
2021 | ||
2022 | /* FIXME, what about the minimal symbol table? */ | |
2023 | return blewit; | |
2024 | #else | |
2025 | return (0); | |
2026 | #endif | |
2027 | } | |
2028 | \f | |
2029 | /* Allocate and partially fill a partial symtab. It will be | |
2030 | completely filled at the end of the symbol list. | |
2031 | ||
d4f3574e | 2032 | FILENAME is the name of the symbol-file we are reading from. */ |
c906108c SS |
2033 | |
2034 | struct partial_symtab * | |
2035 | start_psymtab_common (objfile, section_offsets, | |
2036 | filename, textlow, global_syms, static_syms) | |
2037 | struct objfile *objfile; | |
2038 | struct section_offsets *section_offsets; | |
2039 | char *filename; | |
2040 | CORE_ADDR textlow; | |
2041 | struct partial_symbol **global_syms; | |
2042 | struct partial_symbol **static_syms; | |
2043 | { | |
2044 | struct partial_symtab *psymtab; | |
2045 | ||
2046 | psymtab = allocate_psymtab (filename, objfile); | |
c5aa993b JM |
2047 | psymtab->section_offsets = section_offsets; |
2048 | psymtab->textlow = textlow; | |
2049 | psymtab->texthigh = psymtab->textlow; /* default */ | |
2050 | psymtab->globals_offset = global_syms - objfile->global_psymbols.list; | |
2051 | psymtab->statics_offset = static_syms - objfile->static_psymbols.list; | |
c906108c SS |
2052 | return (psymtab); |
2053 | } | |
2054 | \f | |
2055 | /* Add a symbol with a long value to a psymtab. | |
2056 | Since one arg is a struct, we pass in a ptr and deref it (sigh). */ | |
2057 | ||
2058 | void | |
2059 | add_psymbol_to_list (name, namelength, namespace, class, list, val, coreaddr, | |
2060 | language, objfile) | |
2061 | char *name; | |
2062 | int namelength; | |
2063 | namespace_enum namespace; | |
2064 | enum address_class class; | |
2065 | struct psymbol_allocation_list *list; | |
c5aa993b JM |
2066 | long val; /* Value as a long */ |
2067 | CORE_ADDR coreaddr; /* Value as a CORE_ADDR */ | |
c906108c SS |
2068 | enum language language; |
2069 | struct objfile *objfile; | |
2070 | { | |
2071 | register struct partial_symbol *psym; | |
2072 | char *buf = alloca (namelength + 1); | |
2073 | /* psymbol is static so that there will be no uninitialized gaps in the | |
2074 | structure which might contain random data, causing cache misses in | |
2075 | bcache. */ | |
2076 | static struct partial_symbol psymbol; | |
2077 | ||
2078 | /* Create local copy of the partial symbol */ | |
2079 | memcpy (buf, name, namelength); | |
2080 | buf[namelength] = '\0'; | |
2081 | SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, &objfile->psymbol_cache); | |
2082 | /* val and coreaddr are mutually exclusive, one of them *will* be zero */ | |
2083 | if (val != 0) | |
2084 | { | |
2085 | SYMBOL_VALUE (&psymbol) = val; | |
2086 | } | |
2087 | else | |
2088 | { | |
2089 | SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr; | |
2090 | } | |
2091 | SYMBOL_SECTION (&psymbol) = 0; | |
2092 | SYMBOL_LANGUAGE (&psymbol) = language; | |
2093 | PSYMBOL_NAMESPACE (&psymbol) = namespace; | |
2094 | PSYMBOL_CLASS (&psymbol) = class; | |
2095 | SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language); | |
2096 | ||
2097 | /* Stash the partial symbol away in the cache */ | |
2098 | psym = bcache (&psymbol, sizeof (struct partial_symbol), &objfile->psymbol_cache); | |
2099 | ||
2100 | /* Save pointer to partial symbol in psymtab, growing symtab if needed. */ | |
2101 | if (list->next >= list->list + list->size) | |
2102 | { | |
2103 | extend_psymbol_list (list, objfile); | |
2104 | } | |
2105 | *list->next++ = psym; | |
2106 | OBJSTAT (objfile, n_psyms++); | |
2107 | } | |
2108 | ||
2109 | /* Add a symbol with a long value to a psymtab. This differs from | |
2110 | * add_psymbol_to_list above in taking both a mangled and a demangled | |
2111 | * name. */ | |
2112 | ||
2113 | void | |
2114 | add_psymbol_with_dem_name_to_list (name, namelength, dem_name, dem_namelength, | |
c5aa993b | 2115 | namespace, class, list, val, coreaddr, language, objfile) |
c906108c SS |
2116 | char *name; |
2117 | int namelength; | |
2118 | char *dem_name; | |
2119 | int dem_namelength; | |
2120 | namespace_enum namespace; | |
2121 | enum address_class class; | |
2122 | struct psymbol_allocation_list *list; | |
c5aa993b JM |
2123 | long val; /* Value as a long */ |
2124 | CORE_ADDR coreaddr; /* Value as a CORE_ADDR */ | |
c906108c SS |
2125 | enum language language; |
2126 | struct objfile *objfile; | |
2127 | { | |
2128 | register struct partial_symbol *psym; | |
2129 | char *buf = alloca (namelength + 1); | |
2130 | /* psymbol is static so that there will be no uninitialized gaps in the | |
2131 | structure which might contain random data, causing cache misses in | |
2132 | bcache. */ | |
2133 | static struct partial_symbol psymbol; | |
2134 | ||
2135 | /* Create local copy of the partial symbol */ | |
2136 | ||
2137 | memcpy (buf, name, namelength); | |
2138 | buf[namelength] = '\0'; | |
2139 | SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, &objfile->psymbol_cache); | |
2140 | ||
2141 | buf = alloca (dem_namelength + 1); | |
2142 | memcpy (buf, dem_name, dem_namelength); | |
2143 | buf[dem_namelength] = '\0'; | |
c5aa993b | 2144 | |
c906108c SS |
2145 | switch (language) |
2146 | { | |
c5aa993b JM |
2147 | case language_c: |
2148 | case language_cplus: | |
2149 | SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol) = | |
2150 | bcache (buf, dem_namelength + 1, &objfile->psymbol_cache); | |
2151 | break; | |
2152 | case language_chill: | |
2153 | SYMBOL_CHILL_DEMANGLED_NAME (&psymbol) = | |
2154 | bcache (buf, dem_namelength + 1, &objfile->psymbol_cache); | |
2155 | ||
c906108c SS |
2156 | /* FIXME What should be done for the default case? Ignoring for now. */ |
2157 | } | |
2158 | ||
2159 | /* val and coreaddr are mutually exclusive, one of them *will* be zero */ | |
2160 | if (val != 0) | |
2161 | { | |
2162 | SYMBOL_VALUE (&psymbol) = val; | |
2163 | } | |
2164 | else | |
2165 | { | |
2166 | SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr; | |
2167 | } | |
2168 | SYMBOL_SECTION (&psymbol) = 0; | |
2169 | SYMBOL_LANGUAGE (&psymbol) = language; | |
2170 | PSYMBOL_NAMESPACE (&psymbol) = namespace; | |
2171 | PSYMBOL_CLASS (&psymbol) = class; | |
2172 | SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language); | |
2173 | ||
2174 | /* Stash the partial symbol away in the cache */ | |
2175 | psym = bcache (&psymbol, sizeof (struct partial_symbol), &objfile->psymbol_cache); | |
2176 | ||
2177 | /* Save pointer to partial symbol in psymtab, growing symtab if needed. */ | |
2178 | if (list->next >= list->list + list->size) | |
2179 | { | |
2180 | extend_psymbol_list (list, objfile); | |
2181 | } | |
2182 | *list->next++ = psym; | |
2183 | OBJSTAT (objfile, n_psyms++); | |
2184 | } | |
2185 | ||
2186 | /* Initialize storage for partial symbols. */ | |
2187 | ||
2188 | void | |
2189 | init_psymbol_list (objfile, total_symbols) | |
2190 | struct objfile *objfile; | |
2191 | int total_symbols; | |
2192 | { | |
2193 | /* Free any previously allocated psymbol lists. */ | |
c5aa993b JM |
2194 | |
2195 | if (objfile->global_psymbols.list) | |
c906108c | 2196 | { |
c5aa993b | 2197 | mfree (objfile->md, (PTR) objfile->global_psymbols.list); |
c906108c | 2198 | } |
c5aa993b | 2199 | if (objfile->static_psymbols.list) |
c906108c | 2200 | { |
c5aa993b | 2201 | mfree (objfile->md, (PTR) objfile->static_psymbols.list); |
c906108c | 2202 | } |
c5aa993b | 2203 | |
c906108c SS |
2204 | /* Current best guess is that approximately a twentieth |
2205 | of the total symbols (in a debugging file) are global or static | |
2206 | oriented symbols */ | |
c906108c | 2207 | |
c5aa993b JM |
2208 | objfile->global_psymbols.size = total_symbols / 10; |
2209 | objfile->static_psymbols.size = total_symbols / 10; | |
2210 | ||
2211 | if (objfile->global_psymbols.size > 0) | |
c906108c | 2212 | { |
c5aa993b JM |
2213 | objfile->global_psymbols.next = |
2214 | objfile->global_psymbols.list = (struct partial_symbol **) | |
2215 | xmmalloc (objfile->md, (objfile->global_psymbols.size | |
2216 | * sizeof (struct partial_symbol *))); | |
c906108c | 2217 | } |
c5aa993b | 2218 | if (objfile->static_psymbols.size > 0) |
c906108c | 2219 | { |
c5aa993b JM |
2220 | objfile->static_psymbols.next = |
2221 | objfile->static_psymbols.list = (struct partial_symbol **) | |
2222 | xmmalloc (objfile->md, (objfile->static_psymbols.size | |
2223 | * sizeof (struct partial_symbol *))); | |
c906108c SS |
2224 | } |
2225 | } | |
2226 | ||
2227 | /* OVERLAYS: | |
2228 | The following code implements an abstraction for debugging overlay sections. | |
2229 | ||
2230 | The target model is as follows: | |
2231 | 1) The gnu linker will permit multiple sections to be mapped into the | |
c5aa993b | 2232 | same VMA, each with its own unique LMA (or load address). |
c906108c | 2233 | 2) It is assumed that some runtime mechanism exists for mapping the |
c5aa993b | 2234 | sections, one by one, from the load address into the VMA address. |
c906108c | 2235 | 3) This code provides a mechanism for gdb to keep track of which |
c5aa993b JM |
2236 | sections should be considered to be mapped from the VMA to the LMA. |
2237 | This information is used for symbol lookup, and memory read/write. | |
2238 | For instance, if a section has been mapped then its contents | |
2239 | should be read from the VMA, otherwise from the LMA. | |
c906108c SS |
2240 | |
2241 | Two levels of debugger support for overlays are available. One is | |
2242 | "manual", in which the debugger relies on the user to tell it which | |
2243 | overlays are currently mapped. This level of support is | |
2244 | implemented entirely in the core debugger, and the information about | |
2245 | whether a section is mapped is kept in the objfile->obj_section table. | |
2246 | ||
2247 | The second level of support is "automatic", and is only available if | |
2248 | the target-specific code provides functionality to read the target's | |
2249 | overlay mapping table, and translate its contents for the debugger | |
2250 | (by updating the mapped state information in the obj_section tables). | |
2251 | ||
2252 | The interface is as follows: | |
c5aa993b JM |
2253 | User commands: |
2254 | overlay map <name> -- tell gdb to consider this section mapped | |
2255 | overlay unmap <name> -- tell gdb to consider this section unmapped | |
2256 | overlay list -- list the sections that GDB thinks are mapped | |
2257 | overlay read-target -- get the target's state of what's mapped | |
2258 | overlay off/manual/auto -- set overlay debugging state | |
2259 | Functional interface: | |
2260 | find_pc_mapped_section(pc): if the pc is in the range of a mapped | |
2261 | section, return that section. | |
2262 | find_pc_overlay(pc): find any overlay section that contains | |
2263 | the pc, either in its VMA or its LMA | |
2264 | overlay_is_mapped(sect): true if overlay is marked as mapped | |
2265 | section_is_overlay(sect): true if section's VMA != LMA | |
2266 | pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA | |
2267 | pc_in_unmapped_range(...): true if pc belongs to section's LMA | |
2268 | overlay_mapped_address(...): map an address from section's LMA to VMA | |
2269 | overlay_unmapped_address(...): map an address from section's VMA to LMA | |
2270 | symbol_overlayed_address(...): Return a "current" address for symbol: | |
2271 | either in VMA or LMA depending on whether | |
2272 | the symbol's section is currently mapped | |
c906108c SS |
2273 | */ |
2274 | ||
2275 | /* Overlay debugging state: */ | |
2276 | ||
2277 | int overlay_debugging = 0; /* 0 == off, 1 == manual, -1 == auto */ | |
2278 | int overlay_cache_invalid = 0; /* True if need to refresh mapped state */ | |
2279 | ||
2280 | /* Target vector for refreshing overlay mapped state */ | |
2281 | static void simple_overlay_update PARAMS ((struct obj_section *)); | |
c5aa993b JM |
2282 | void (*target_overlay_update) PARAMS ((struct obj_section *)) |
2283 | = simple_overlay_update; | |
c906108c SS |
2284 | |
2285 | /* Function: section_is_overlay (SECTION) | |
2286 | Returns true if SECTION has VMA not equal to LMA, ie. | |
2287 | SECTION is loaded at an address different from where it will "run". */ | |
2288 | ||
2289 | int | |
2290 | section_is_overlay (section) | |
2291 | asection *section; | |
2292 | { | |
2293 | if (overlay_debugging) | |
2294 | if (section && section->lma != 0 && | |
2295 | section->vma != section->lma) | |
2296 | return 1; | |
2297 | ||
2298 | return 0; | |
2299 | } | |
2300 | ||
2301 | /* Function: overlay_invalidate_all (void) | |
2302 | Invalidate the mapped state of all overlay sections (mark it as stale). */ | |
2303 | ||
2304 | static void | |
2305 | overlay_invalidate_all () | |
2306 | { | |
c5aa993b | 2307 | struct objfile *objfile; |
c906108c SS |
2308 | struct obj_section *sect; |
2309 | ||
2310 | ALL_OBJSECTIONS (objfile, sect) | |
2311 | if (section_is_overlay (sect->the_bfd_section)) | |
c5aa993b | 2312 | sect->ovly_mapped = -1; |
c906108c SS |
2313 | } |
2314 | ||
2315 | /* Function: overlay_is_mapped (SECTION) | |
2316 | Returns true if section is an overlay, and is currently mapped. | |
2317 | Private: public access is thru function section_is_mapped. | |
2318 | ||
2319 | Access to the ovly_mapped flag is restricted to this function, so | |
2320 | that we can do automatic update. If the global flag | |
2321 | OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call | |
2322 | overlay_invalidate_all. If the mapped state of the particular | |
2323 | section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */ | |
2324 | ||
c5aa993b | 2325 | static int |
c906108c SS |
2326 | overlay_is_mapped (osect) |
2327 | struct obj_section *osect; | |
2328 | { | |
2329 | if (osect == 0 || !section_is_overlay (osect->the_bfd_section)) | |
2330 | return 0; | |
2331 | ||
c5aa993b | 2332 | switch (overlay_debugging) |
c906108c SS |
2333 | { |
2334 | default: | |
c5aa993b JM |
2335 | case 0: |
2336 | return 0; /* overlay debugging off */ | |
c906108c SS |
2337 | case -1: /* overlay debugging automatic */ |
2338 | /* Unles there is a target_overlay_update function, | |
c5aa993b | 2339 | there's really nothing useful to do here (can't really go auto) */ |
c906108c SS |
2340 | if (target_overlay_update) |
2341 | { | |
2342 | if (overlay_cache_invalid) | |
2343 | { | |
2344 | overlay_invalidate_all (); | |
2345 | overlay_cache_invalid = 0; | |
2346 | } | |
2347 | if (osect->ovly_mapped == -1) | |
2348 | (*target_overlay_update) (osect); | |
2349 | } | |
2350 | /* fall thru to manual case */ | |
2351 | case 1: /* overlay debugging manual */ | |
2352 | return osect->ovly_mapped == 1; | |
2353 | } | |
2354 | } | |
2355 | ||
2356 | /* Function: section_is_mapped | |
2357 | Returns true if section is an overlay, and is currently mapped. */ | |
2358 | ||
2359 | int | |
2360 | section_is_mapped (section) | |
2361 | asection *section; | |
2362 | { | |
c5aa993b | 2363 | struct objfile *objfile; |
c906108c SS |
2364 | struct obj_section *osect; |
2365 | ||
2366 | if (overlay_debugging) | |
2367 | if (section && section_is_overlay (section)) | |
2368 | ALL_OBJSECTIONS (objfile, osect) | |
2369 | if (osect->the_bfd_section == section) | |
c5aa993b | 2370 | return overlay_is_mapped (osect); |
c906108c SS |
2371 | |
2372 | return 0; | |
2373 | } | |
2374 | ||
2375 | /* Function: pc_in_unmapped_range | |
2376 | If PC falls into the lma range of SECTION, return true, else false. */ | |
2377 | ||
2378 | CORE_ADDR | |
2379 | pc_in_unmapped_range (pc, section) | |
2380 | CORE_ADDR pc; | |
2381 | asection *section; | |
2382 | { | |
2383 | int size; | |
2384 | ||
2385 | if (overlay_debugging) | |
2386 | if (section && section_is_overlay (section)) | |
2387 | { | |
2388 | size = bfd_get_section_size_before_reloc (section); | |
2389 | if (section->lma <= pc && pc < section->lma + size) | |
2390 | return 1; | |
2391 | } | |
2392 | return 0; | |
2393 | } | |
2394 | ||
2395 | /* Function: pc_in_mapped_range | |
2396 | If PC falls into the vma range of SECTION, return true, else false. */ | |
2397 | ||
2398 | CORE_ADDR | |
2399 | pc_in_mapped_range (pc, section) | |
2400 | CORE_ADDR pc; | |
2401 | asection *section; | |
2402 | { | |
2403 | int size; | |
2404 | ||
2405 | if (overlay_debugging) | |
2406 | if (section && section_is_overlay (section)) | |
2407 | { | |
2408 | size = bfd_get_section_size_before_reloc (section); | |
2409 | if (section->vma <= pc && pc < section->vma + size) | |
2410 | return 1; | |
2411 | } | |
2412 | return 0; | |
2413 | } | |
2414 | ||
2415 | /* Function: overlay_unmapped_address (PC, SECTION) | |
2416 | Returns the address corresponding to PC in the unmapped (load) range. | |
2417 | May be the same as PC. */ | |
2418 | ||
2419 | CORE_ADDR | |
2420 | overlay_unmapped_address (pc, section) | |
2421 | CORE_ADDR pc; | |
2422 | asection *section; | |
2423 | { | |
2424 | if (overlay_debugging) | |
2425 | if (section && section_is_overlay (section) && | |
2426 | pc_in_mapped_range (pc, section)) | |
2427 | return pc + section->lma - section->vma; | |
2428 | ||
2429 | return pc; | |
2430 | } | |
2431 | ||
2432 | /* Function: overlay_mapped_address (PC, SECTION) | |
2433 | Returns the address corresponding to PC in the mapped (runtime) range. | |
2434 | May be the same as PC. */ | |
2435 | ||
2436 | CORE_ADDR | |
2437 | overlay_mapped_address (pc, section) | |
2438 | CORE_ADDR pc; | |
2439 | asection *section; | |
2440 | { | |
2441 | if (overlay_debugging) | |
2442 | if (section && section_is_overlay (section) && | |
2443 | pc_in_unmapped_range (pc, section)) | |
2444 | return pc + section->vma - section->lma; | |
2445 | ||
2446 | return pc; | |
2447 | } | |
2448 | ||
2449 | ||
2450 | /* Function: symbol_overlayed_address | |
2451 | Return one of two addresses (relative to the VMA or to the LMA), | |
2452 | depending on whether the section is mapped or not. */ | |
2453 | ||
c5aa993b | 2454 | CORE_ADDR |
c906108c SS |
2455 | symbol_overlayed_address (address, section) |
2456 | CORE_ADDR address; | |
2457 | asection *section; | |
2458 | { | |
2459 | if (overlay_debugging) | |
2460 | { | |
2461 | /* If the symbol has no section, just return its regular address. */ | |
2462 | if (section == 0) | |
2463 | return address; | |
2464 | /* If the symbol's section is not an overlay, just return its address */ | |
2465 | if (!section_is_overlay (section)) | |
2466 | return address; | |
2467 | /* If the symbol's section is mapped, just return its address */ | |
2468 | if (section_is_mapped (section)) | |
2469 | return address; | |
2470 | /* | |
2471 | * HOWEVER: if the symbol is in an overlay section which is NOT mapped, | |
2472 | * then return its LOADED address rather than its vma address!! | |
2473 | */ | |
2474 | return overlay_unmapped_address (address, section); | |
2475 | } | |
2476 | return address; | |
2477 | } | |
2478 | ||
2479 | /* Function: find_pc_overlay (PC) | |
2480 | Return the best-match overlay section for PC: | |
2481 | If PC matches a mapped overlay section's VMA, return that section. | |
2482 | Else if PC matches an unmapped section's VMA, return that section. | |
2483 | Else if PC matches an unmapped section's LMA, return that section. */ | |
2484 | ||
2485 | asection * | |
2486 | find_pc_overlay (pc) | |
2487 | CORE_ADDR pc; | |
2488 | { | |
c5aa993b | 2489 | struct objfile *objfile; |
c906108c SS |
2490 | struct obj_section *osect, *best_match = NULL; |
2491 | ||
2492 | if (overlay_debugging) | |
2493 | ALL_OBJSECTIONS (objfile, osect) | |
2494 | if (section_is_overlay (osect->the_bfd_section)) | |
c5aa993b JM |
2495 | { |
2496 | if (pc_in_mapped_range (pc, osect->the_bfd_section)) | |
2497 | { | |
2498 | if (overlay_is_mapped (osect)) | |
2499 | return osect->the_bfd_section; | |
2500 | else | |
2501 | best_match = osect; | |
2502 | } | |
2503 | else if (pc_in_unmapped_range (pc, osect->the_bfd_section)) | |
2504 | best_match = osect; | |
2505 | } | |
c906108c SS |
2506 | return best_match ? best_match->the_bfd_section : NULL; |
2507 | } | |
2508 | ||
2509 | /* Function: find_pc_mapped_section (PC) | |
2510 | If PC falls into the VMA address range of an overlay section that is | |
2511 | currently marked as MAPPED, return that section. Else return NULL. */ | |
2512 | ||
2513 | asection * | |
2514 | find_pc_mapped_section (pc) | |
2515 | CORE_ADDR pc; | |
2516 | { | |
c5aa993b | 2517 | struct objfile *objfile; |
c906108c SS |
2518 | struct obj_section *osect; |
2519 | ||
2520 | if (overlay_debugging) | |
2521 | ALL_OBJSECTIONS (objfile, osect) | |
2522 | if (pc_in_mapped_range (pc, osect->the_bfd_section) && | |
2523 | overlay_is_mapped (osect)) | |
c5aa993b | 2524 | return osect->the_bfd_section; |
c906108c SS |
2525 | |
2526 | return NULL; | |
2527 | } | |
2528 | ||
2529 | /* Function: list_overlays_command | |
2530 | Print a list of mapped sections and their PC ranges */ | |
2531 | ||
2532 | void | |
2533 | list_overlays_command (args, from_tty) | |
2534 | char *args; | |
2535 | int from_tty; | |
2536 | { | |
c5aa993b JM |
2537 | int nmapped = 0; |
2538 | struct objfile *objfile; | |
c906108c SS |
2539 | struct obj_section *osect; |
2540 | ||
2541 | if (overlay_debugging) | |
2542 | ALL_OBJSECTIONS (objfile, osect) | |
2543 | if (overlay_is_mapped (osect)) | |
c5aa993b JM |
2544 | { |
2545 | const char *name; | |
2546 | bfd_vma lma, vma; | |
2547 | int size; | |
2548 | ||
2549 | vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section); | |
2550 | lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section); | |
2551 | size = bfd_get_section_size_before_reloc (osect->the_bfd_section); | |
2552 | name = bfd_section_name (objfile->obfd, osect->the_bfd_section); | |
2553 | ||
2554 | printf_filtered ("Section %s, loaded at ", name); | |
2555 | print_address_numeric (lma, 1, gdb_stdout); | |
2556 | puts_filtered (" - "); | |
2557 | print_address_numeric (lma + size, 1, gdb_stdout); | |
2558 | printf_filtered (", mapped at "); | |
2559 | print_address_numeric (vma, 1, gdb_stdout); | |
2560 | puts_filtered (" - "); | |
2561 | print_address_numeric (vma + size, 1, gdb_stdout); | |
2562 | puts_filtered ("\n"); | |
2563 | ||
2564 | nmapped++; | |
2565 | } | |
c906108c SS |
2566 | if (nmapped == 0) |
2567 | printf_filtered ("No sections are mapped.\n"); | |
2568 | } | |
2569 | ||
2570 | /* Function: map_overlay_command | |
2571 | Mark the named section as mapped (ie. residing at its VMA address). */ | |
2572 | ||
2573 | void | |
2574 | map_overlay_command (args, from_tty) | |
2575 | char *args; | |
c5aa993b | 2576 | int from_tty; |
c906108c | 2577 | { |
c5aa993b JM |
2578 | struct objfile *objfile, *objfile2; |
2579 | struct obj_section *sec, *sec2; | |
2580 | asection *bfdsec; | |
c906108c SS |
2581 | |
2582 | if (!overlay_debugging) | |
2583 | error ("Overlay debugging not enabled. Use the 'OVERLAY ON' command."); | |
2584 | ||
2585 | if (args == 0 || *args == 0) | |
2586 | error ("Argument required: name of an overlay section"); | |
2587 | ||
2588 | /* First, find a section matching the user supplied argument */ | |
2589 | ALL_OBJSECTIONS (objfile, sec) | |
2590 | if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args)) | |
c5aa993b JM |
2591 | { |
2592 | /* Now, check to see if the section is an overlay. */ | |
2593 | bfdsec = sec->the_bfd_section; | |
2594 | if (!section_is_overlay (bfdsec)) | |
2595 | continue; /* not an overlay section */ | |
2596 | ||
2597 | /* Mark the overlay as "mapped" */ | |
2598 | sec->ovly_mapped = 1; | |
2599 | ||
2600 | /* Next, make a pass and unmap any sections that are | |
2601 | overlapped by this new section: */ | |
2602 | ALL_OBJSECTIONS (objfile2, sec2) | |
2603 | if (sec2->ovly_mapped && | |
2604 | sec != sec2 && | |
2605 | sec->the_bfd_section != sec2->the_bfd_section && | |
2606 | (pc_in_mapped_range (sec2->addr, sec->the_bfd_section) || | |
2607 | pc_in_mapped_range (sec2->endaddr, sec->the_bfd_section))) | |
2608 | { | |
2609 | if (info_verbose) | |
2610 | printf_filtered ("Note: section %s unmapped by overlap\n", | |
2611 | bfd_section_name (objfile->obfd, | |
2612 | sec2->the_bfd_section)); | |
2613 | sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2 */ | |
2614 | } | |
2615 | return; | |
2616 | } | |
c906108c SS |
2617 | error ("No overlay section called %s", args); |
2618 | } | |
2619 | ||
2620 | /* Function: unmap_overlay_command | |
2621 | Mark the overlay section as unmapped | |
2622 | (ie. resident in its LMA address range, rather than the VMA range). */ | |
2623 | ||
2624 | void | |
2625 | unmap_overlay_command (args, from_tty) | |
2626 | char *args; | |
c5aa993b | 2627 | int from_tty; |
c906108c | 2628 | { |
c5aa993b | 2629 | struct objfile *objfile; |
c906108c SS |
2630 | struct obj_section *sec; |
2631 | ||
2632 | if (!overlay_debugging) | |
2633 | error ("Overlay debugging not enabled. Use the 'OVERLAY ON' command."); | |
2634 | ||
2635 | if (args == 0 || *args == 0) | |
2636 | error ("Argument required: name of an overlay section"); | |
2637 | ||
2638 | /* First, find a section matching the user supplied argument */ | |
2639 | ALL_OBJSECTIONS (objfile, sec) | |
2640 | if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args)) | |
c5aa993b JM |
2641 | { |
2642 | if (!sec->ovly_mapped) | |
2643 | error ("Section %s is not mapped", args); | |
2644 | sec->ovly_mapped = 0; | |
2645 | return; | |
2646 | } | |
c906108c SS |
2647 | error ("No overlay section called %s", args); |
2648 | } | |
2649 | ||
2650 | /* Function: overlay_auto_command | |
2651 | A utility command to turn on overlay debugging. | |
2652 | Possibly this should be done via a set/show command. */ | |
2653 | ||
2654 | static void | |
2655 | overlay_auto_command (args, from_tty) | |
2656 | char *args; | |
c5aa993b | 2657 | int from_tty; |
c906108c SS |
2658 | { |
2659 | overlay_debugging = -1; | |
2660 | if (info_verbose) | |
2661 | printf_filtered ("Automatic overlay debugging enabled."); | |
2662 | } | |
2663 | ||
2664 | /* Function: overlay_manual_command | |
2665 | A utility command to turn on overlay debugging. | |
2666 | Possibly this should be done via a set/show command. */ | |
2667 | ||
2668 | static void | |
2669 | overlay_manual_command (args, from_tty) | |
2670 | char *args; | |
c5aa993b | 2671 | int from_tty; |
c906108c SS |
2672 | { |
2673 | overlay_debugging = 1; | |
2674 | if (info_verbose) | |
2675 | printf_filtered ("Overlay debugging enabled."); | |
2676 | } | |
2677 | ||
2678 | /* Function: overlay_off_command | |
2679 | A utility command to turn on overlay debugging. | |
2680 | Possibly this should be done via a set/show command. */ | |
2681 | ||
2682 | static void | |
2683 | overlay_off_command (args, from_tty) | |
2684 | char *args; | |
c5aa993b | 2685 | int from_tty; |
c906108c | 2686 | { |
c5aa993b | 2687 | overlay_debugging = 0; |
c906108c SS |
2688 | if (info_verbose) |
2689 | printf_filtered ("Overlay debugging disabled."); | |
2690 | } | |
2691 | ||
2692 | static void | |
2693 | overlay_load_command (args, from_tty) | |
2694 | char *args; | |
c5aa993b | 2695 | int from_tty; |
c906108c SS |
2696 | { |
2697 | if (target_overlay_update) | |
2698 | (*target_overlay_update) (NULL); | |
2699 | else | |
2700 | error ("This target does not know how to read its overlay state."); | |
2701 | } | |
2702 | ||
2703 | /* Function: overlay_command | |
2704 | A place-holder for a mis-typed command */ | |
2705 | ||
2706 | /* Command list chain containing all defined "overlay" subcommands. */ | |
2707 | struct cmd_list_element *overlaylist; | |
2708 | ||
2709 | static void | |
2710 | overlay_command (args, from_tty) | |
2711 | char *args; | |
2712 | int from_tty; | |
2713 | { | |
c5aa993b | 2714 | printf_unfiltered |
c906108c SS |
2715 | ("\"overlay\" must be followed by the name of an overlay command.\n"); |
2716 | help_list (overlaylist, "overlay ", -1, gdb_stdout); | |
2717 | } | |
2718 | ||
2719 | ||
2720 | /* Target Overlays for the "Simplest" overlay manager: | |
2721 | ||
2722 | This is GDB's default target overlay layer. It works with the | |
2723 | minimal overlay manager supplied as an example by Cygnus. The | |
2724 | entry point is via a function pointer "target_overlay_update", | |
2725 | so targets that use a different runtime overlay manager can | |
2726 | substitute their own overlay_update function and take over the | |
2727 | function pointer. | |
2728 | ||
2729 | The overlay_update function pokes around in the target's data structures | |
2730 | to see what overlays are mapped, and updates GDB's overlay mapping with | |
2731 | this information. | |
2732 | ||
2733 | In this simple implementation, the target data structures are as follows: | |
c5aa993b JM |
2734 | unsigned _novlys; /# number of overlay sections #/ |
2735 | unsigned _ovly_table[_novlys][4] = { | |
2736 | {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/ | |
2737 | {..., ..., ..., ...}, | |
2738 | } | |
2739 | unsigned _novly_regions; /# number of overlay regions #/ | |
2740 | unsigned _ovly_region_table[_novly_regions][3] = { | |
2741 | {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/ | |
2742 | {..., ..., ...}, | |
2743 | } | |
c906108c SS |
2744 | These functions will attempt to update GDB's mappedness state in the |
2745 | symbol section table, based on the target's mappedness state. | |
2746 | ||
2747 | To do this, we keep a cached copy of the target's _ovly_table, and | |
2748 | attempt to detect when the cached copy is invalidated. The main | |
2749 | entry point is "simple_overlay_update(SECT), which looks up SECT in | |
2750 | the cached table and re-reads only the entry for that section from | |
2751 | the target (whenever possible). | |
2752 | */ | |
2753 | ||
2754 | /* Cached, dynamically allocated copies of the target data structures: */ | |
c5aa993b | 2755 | static unsigned (*cache_ovly_table)[4] = 0; |
c906108c | 2756 | #if 0 |
c5aa993b | 2757 | static unsigned (*cache_ovly_region_table)[3] = 0; |
c906108c | 2758 | #endif |
c5aa993b | 2759 | static unsigned cache_novlys = 0; |
c906108c | 2760 | #if 0 |
c5aa993b | 2761 | static unsigned cache_novly_regions = 0; |
c906108c SS |
2762 | #endif |
2763 | static CORE_ADDR cache_ovly_table_base = 0; | |
2764 | #if 0 | |
2765 | static CORE_ADDR cache_ovly_region_table_base = 0; | |
2766 | #endif | |
c5aa993b JM |
2767 | enum ovly_index |
2768 | { | |
2769 | VMA, SIZE, LMA, MAPPED | |
2770 | }; | |
c906108c SS |
2771 | #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT) |
2772 | ||
2773 | /* Throw away the cached copy of _ovly_table */ | |
2774 | static void | |
2775 | simple_free_overlay_table () | |
2776 | { | |
2777 | if (cache_ovly_table) | |
c5aa993b JM |
2778 | free (cache_ovly_table); |
2779 | cache_novlys = 0; | |
c906108c SS |
2780 | cache_ovly_table = NULL; |
2781 | cache_ovly_table_base = 0; | |
2782 | } | |
2783 | ||
2784 | #if 0 | |
2785 | /* Throw away the cached copy of _ovly_region_table */ | |
2786 | static void | |
2787 | simple_free_overlay_region_table () | |
2788 | { | |
2789 | if (cache_ovly_region_table) | |
c5aa993b JM |
2790 | free (cache_ovly_region_table); |
2791 | cache_novly_regions = 0; | |
c906108c SS |
2792 | cache_ovly_region_table = NULL; |
2793 | cache_ovly_region_table_base = 0; | |
2794 | } | |
2795 | #endif | |
2796 | ||
2797 | /* Read an array of ints from the target into a local buffer. | |
2798 | Convert to host order. int LEN is number of ints */ | |
2799 | static void | |
2800 | read_target_long_array (memaddr, myaddr, len) | |
c5aa993b | 2801 | CORE_ADDR memaddr; |
c906108c | 2802 | unsigned int *myaddr; |
c5aa993b | 2803 | int len; |
c906108c SS |
2804 | { |
2805 | char *buf = alloca (len * TARGET_LONG_BYTES); | |
c5aa993b | 2806 | int i; |
c906108c SS |
2807 | |
2808 | read_memory (memaddr, buf, len * TARGET_LONG_BYTES); | |
2809 | for (i = 0; i < len; i++) | |
c5aa993b | 2810 | myaddr[i] = extract_unsigned_integer (TARGET_LONG_BYTES * i + buf, |
c906108c SS |
2811 | TARGET_LONG_BYTES); |
2812 | } | |
2813 | ||
2814 | /* Find and grab a copy of the target _ovly_table | |
2815 | (and _novlys, which is needed for the table's size) */ | |
c5aa993b | 2816 | static int |
c906108c SS |
2817 | simple_read_overlay_table () |
2818 | { | |
2819 | struct minimal_symbol *msym; | |
2820 | ||
2821 | simple_free_overlay_table (); | |
2822 | msym = lookup_minimal_symbol ("_novlys", 0, 0); | |
2823 | if (msym != NULL) | |
2824 | cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4); | |
c5aa993b JM |
2825 | else |
2826 | return 0; /* failure */ | |
2827 | cache_ovly_table = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table)); | |
c906108c SS |
2828 | if (cache_ovly_table != NULL) |
2829 | { | |
2830 | msym = lookup_minimal_symbol ("_ovly_table", 0, 0); | |
2831 | if (msym != NULL) | |
2832 | { | |
2833 | cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (msym); | |
c5aa993b JM |
2834 | read_target_long_array (cache_ovly_table_base, |
2835 | (int *) cache_ovly_table, | |
c906108c SS |
2836 | cache_novlys * 4); |
2837 | } | |
c5aa993b JM |
2838 | else |
2839 | return 0; /* failure */ | |
c906108c | 2840 | } |
c5aa993b JM |
2841 | else |
2842 | return 0; /* failure */ | |
2843 | return 1; /* SUCCESS */ | |
c906108c SS |
2844 | } |
2845 | ||
2846 | #if 0 | |
2847 | /* Find and grab a copy of the target _ovly_region_table | |
2848 | (and _novly_regions, which is needed for the table's size) */ | |
c5aa993b | 2849 | static int |
c906108c SS |
2850 | simple_read_overlay_region_table () |
2851 | { | |
2852 | struct minimal_symbol *msym; | |
2853 | ||
2854 | simple_free_overlay_region_table (); | |
2855 | msym = lookup_minimal_symbol ("_novly_regions", 0, 0); | |
2856 | if (msym != NULL) | |
2857 | cache_novly_regions = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4); | |
c5aa993b JM |
2858 | else |
2859 | return 0; /* failure */ | |
c906108c SS |
2860 | cache_ovly_region_table = (void *) xmalloc (cache_novly_regions * 12); |
2861 | if (cache_ovly_region_table != NULL) | |
2862 | { | |
2863 | msym = lookup_minimal_symbol ("_ovly_region_table", 0, 0); | |
2864 | if (msym != NULL) | |
2865 | { | |
2866 | cache_ovly_region_table_base = SYMBOL_VALUE_ADDRESS (msym); | |
c5aa993b JM |
2867 | read_target_long_array (cache_ovly_region_table_base, |
2868 | (int *) cache_ovly_region_table, | |
c906108c SS |
2869 | cache_novly_regions * 3); |
2870 | } | |
c5aa993b JM |
2871 | else |
2872 | return 0; /* failure */ | |
c906108c | 2873 | } |
c5aa993b JM |
2874 | else |
2875 | return 0; /* failure */ | |
2876 | return 1; /* SUCCESS */ | |
c906108c SS |
2877 | } |
2878 | #endif | |
2879 | ||
2880 | /* Function: simple_overlay_update_1 | |
2881 | A helper function for simple_overlay_update. Assuming a cached copy | |
2882 | of _ovly_table exists, look through it to find an entry whose vma, | |
2883 | lma and size match those of OSECT. Re-read the entry and make sure | |
2884 | it still matches OSECT (else the table may no longer be valid). | |
2885 | Set OSECT's mapped state to match the entry. Return: 1 for | |
2886 | success, 0 for failure. */ | |
2887 | ||
2888 | static int | |
2889 | simple_overlay_update_1 (osect) | |
2890 | struct obj_section *osect; | |
2891 | { | |
2892 | int i, size; | |
2893 | ||
2894 | size = bfd_get_section_size_before_reloc (osect->the_bfd_section); | |
2895 | for (i = 0; i < cache_novlys; i++) | |
c5aa993b JM |
2896 | if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma && |
2897 | cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* && | |
2898 | cache_ovly_table[i][SIZE] == size */ ) | |
c906108c SS |
2899 | { |
2900 | read_target_long_array (cache_ovly_table_base + i * TARGET_LONG_BYTES, | |
2901 | (int *) cache_ovly_table[i], 4); | |
c5aa993b JM |
2902 | if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma && |
2903 | cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* && | |
2904 | cache_ovly_table[i][SIZE] == size */ ) | |
c906108c SS |
2905 | { |
2906 | osect->ovly_mapped = cache_ovly_table[i][MAPPED]; | |
2907 | return 1; | |
2908 | } | |
c5aa993b | 2909 | else /* Warning! Warning! Target's ovly table has changed! */ |
c906108c SS |
2910 | return 0; |
2911 | } | |
2912 | return 0; | |
2913 | } | |
2914 | ||
2915 | /* Function: simple_overlay_update | |
2916 | If OSECT is NULL, then update all sections' mapped state | |
2917 | (after re-reading the entire target _ovly_table). | |
2918 | If OSECT is non-NULL, then try to find a matching entry in the | |
2919 | cached ovly_table and update only OSECT's mapped state. | |
2920 | If a cached entry can't be found or the cache isn't valid, then | |
2921 | re-read the entire cache, and go ahead and update all sections. */ | |
2922 | ||
2923 | static void | |
2924 | simple_overlay_update (osect) | |
2925 | struct obj_section *osect; | |
2926 | { | |
c5aa993b | 2927 | struct objfile *objfile; |
c906108c SS |
2928 | |
2929 | /* Were we given an osect to look up? NULL means do all of them. */ | |
2930 | if (osect) | |
2931 | /* Have we got a cached copy of the target's overlay table? */ | |
2932 | if (cache_ovly_table != NULL) | |
2933 | /* Does its cached location match what's currently in the symtab? */ | |
c5aa993b | 2934 | if (cache_ovly_table_base == |
c906108c SS |
2935 | SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", 0, 0))) |
2936 | /* Then go ahead and try to look up this single section in the cache */ | |
2937 | if (simple_overlay_update_1 (osect)) | |
2938 | /* Found it! We're done. */ | |
2939 | return; | |
2940 | ||
2941 | /* Cached table no good: need to read the entire table anew. | |
2942 | Or else we want all the sections, in which case it's actually | |
2943 | more efficient to read the whole table in one block anyway. */ | |
2944 | ||
2945 | if (simple_read_overlay_table () == 0) /* read failed? No table? */ | |
2946 | { | |
2947 | warning ("Failed to read the target overlay mapping table."); | |
2948 | return; | |
2949 | } | |
2950 | /* Now may as well update all sections, even if only one was requested. */ | |
2951 | ALL_OBJSECTIONS (objfile, osect) | |
2952 | if (section_is_overlay (osect->the_bfd_section)) | |
c5aa993b JM |
2953 | { |
2954 | int i, size; | |
2955 | ||
2956 | size = bfd_get_section_size_before_reloc (osect->the_bfd_section); | |
2957 | for (i = 0; i < cache_novlys; i++) | |
2958 | if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma && | |
2959 | cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* && | |
2960 | cache_ovly_table[i][SIZE] == size */ ) | |
2961 | { /* obj_section matches i'th entry in ovly_table */ | |
2962 | osect->ovly_mapped = cache_ovly_table[i][MAPPED]; | |
2963 | break; /* finished with inner for loop: break out */ | |
2964 | } | |
2965 | } | |
c906108c SS |
2966 | } |
2967 | ||
2968 | ||
2969 | void | |
2970 | _initialize_symfile () | |
2971 | { | |
2972 | struct cmd_list_element *c; | |
c5aa993b | 2973 | |
c906108c | 2974 | c = add_cmd ("symbol-file", class_files, symbol_file_command, |
c5aa993b | 2975 | "Load symbol table from executable file FILE.\n\ |
c906108c SS |
2976 | The `file' command can also load symbol tables, as well as setting the file\n\ |
2977 | to execute.", &cmdlist); | |
2978 | c->completer = filename_completer; | |
2979 | ||
2980 | c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command, | |
c5aa993b | 2981 | "Usage: add-symbol-file FILE ADDR\n\ |
c906108c SS |
2982 | Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\ |
2983 | ADDR is the starting address of the file's text.", | |
2984 | &cmdlist); | |
2985 | c->completer = filename_completer; | |
2986 | ||
2987 | c = add_cmd ("add-shared-symbol-files", class_files, | |
2988 | add_shared_symbol_files_command, | |
2989 | "Load the symbols from shared objects in the dynamic linker's link map.", | |
c5aa993b | 2990 | &cmdlist); |
c906108c SS |
2991 | c = add_alias_cmd ("assf", "add-shared-symbol-files", class_files, 1, |
2992 | &cmdlist); | |
2993 | ||
2994 | c = add_cmd ("load", class_files, load_command, | |
c5aa993b | 2995 | "Dynamically load FILE into the running program, and record its symbols\n\ |
c906108c SS |
2996 | for access from GDB.", &cmdlist); |
2997 | c->completer = filename_completer; | |
2998 | ||
2999 | add_show_from_set | |
3000 | (add_set_cmd ("symbol-reloading", class_support, var_boolean, | |
c5aa993b JM |
3001 | (char *) &symbol_reloading, |
3002 | "Set dynamic symbol table reloading multiple times in one run.", | |
c906108c SS |
3003 | &setlist), |
3004 | &showlist); | |
3005 | ||
c5aa993b JM |
3006 | add_prefix_cmd ("overlay", class_support, overlay_command, |
3007 | "Commands for debugging overlays.", &overlaylist, | |
c906108c SS |
3008 | "overlay ", 0, &cmdlist); |
3009 | ||
3010 | add_com_alias ("ovly", "overlay", class_alias, 1); | |
3011 | add_com_alias ("ov", "overlay", class_alias, 1); | |
3012 | ||
c5aa993b | 3013 | add_cmd ("map-overlay", class_support, map_overlay_command, |
c906108c SS |
3014 | "Assert that an overlay section is mapped.", &overlaylist); |
3015 | ||
c5aa993b | 3016 | add_cmd ("unmap-overlay", class_support, unmap_overlay_command, |
c906108c SS |
3017 | "Assert that an overlay section is unmapped.", &overlaylist); |
3018 | ||
c5aa993b | 3019 | add_cmd ("list-overlays", class_support, list_overlays_command, |
c906108c SS |
3020 | "List mappings of overlay sections.", &overlaylist); |
3021 | ||
c5aa993b | 3022 | add_cmd ("manual", class_support, overlay_manual_command, |
c906108c | 3023 | "Enable overlay debugging.", &overlaylist); |
c5aa993b | 3024 | add_cmd ("off", class_support, overlay_off_command, |
c906108c | 3025 | "Disable overlay debugging.", &overlaylist); |
c5aa993b | 3026 | add_cmd ("auto", class_support, overlay_auto_command, |
c906108c | 3027 | "Enable automatic overlay debugging.", &overlaylist); |
c5aa993b | 3028 | add_cmd ("load-target", class_support, overlay_load_command, |
c906108c SS |
3029 | "Read the overlay mapping state from the target.", &overlaylist); |
3030 | ||
3031 | /* Filename extension to source language lookup table: */ | |
3032 | init_filename_language_table (); | |
3033 | c = add_set_cmd ("extension-language", class_files, var_string_noescape, | |
c5aa993b | 3034 | (char *) &ext_args, |
c906108c SS |
3035 | "Set mapping between filename extension and source language.\n\ |
3036 | Usage: set extension-language .foo bar", | |
c5aa993b | 3037 | &setlist); |
c906108c SS |
3038 | c->function.cfunc = set_ext_lang_command; |
3039 | ||
c5aa993b | 3040 | add_info ("extensions", info_ext_lang_command, |
c906108c SS |
3041 | "All filename extensions associated with a source language."); |
3042 | } |