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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 | ||
917317f4 | 66 | int (*ui_load_progress_hook) (const char *section, unsigned long num); |
c2d11a7d JM |
67 | void (*show_load_progress) (const char *section, |
68 | unsigned long section_sent, | |
69 | unsigned long section_size, | |
70 | unsigned long total_sent, | |
71 | unsigned long total_size); | |
c906108c SS |
72 | void (*pre_add_symbol_hook) PARAMS ((char *)); |
73 | void (*post_add_symbol_hook) PARAMS ((void)); | |
11cf8741 | 74 | void (*target_new_objfile_hook) PARAMS ((struct objfile *)); |
c906108c SS |
75 | |
76 | /* Global variables owned by this file */ | |
c5aa993b | 77 | int readnow_symbol_files; /* Read full symbols immediately */ |
c906108c | 78 | |
c5aa993b JM |
79 | struct complaint oldsyms_complaint = |
80 | { | |
c906108c SS |
81 | "Replacing old symbols for `%s'", 0, 0 |
82 | }; | |
83 | ||
c5aa993b JM |
84 | struct complaint empty_symtab_complaint = |
85 | { | |
c906108c SS |
86 | "Empty symbol table found for `%s'", 0, 0 |
87 | }; | |
88 | ||
2acceee2 JM |
89 | struct complaint unknown_option_complaint = |
90 | { | |
91 | "Unknown option `%s' ignored", 0, 0 | |
92 | }; | |
93 | ||
c906108c SS |
94 | /* External variables and functions referenced. */ |
95 | ||
96 | extern int info_verbose; | |
97 | ||
98 | extern void report_transfer_performance PARAMS ((unsigned long, | |
99 | time_t, time_t)); | |
100 | ||
101 | /* Functions this file defines */ | |
102 | ||
103 | #if 0 | |
104 | static int simple_read_overlay_region_table PARAMS ((void)); | |
105 | static void simple_free_overlay_region_table PARAMS ((void)); | |
106 | #endif | |
107 | ||
108 | static void set_initial_language PARAMS ((void)); | |
109 | ||
110 | static void load_command PARAMS ((char *, int)); | |
111 | ||
112 | static void add_symbol_file_command PARAMS ((char *, int)); | |
113 | ||
114 | static void add_shared_symbol_files_command PARAMS ((char *, int)); | |
115 | ||
116 | static void cashier_psymtab PARAMS ((struct partial_symtab *)); | |
117 | ||
118 | static int compare_psymbols PARAMS ((const void *, const void *)); | |
119 | ||
120 | static int compare_symbols PARAMS ((const void *, const void *)); | |
121 | ||
122 | bfd *symfile_bfd_open PARAMS ((char *)); | |
123 | ||
124 | static void find_sym_fns PARAMS ((struct objfile *)); | |
125 | ||
126 | static void decrement_reading_symtab PARAMS ((void *)); | |
127 | ||
128 | static void overlay_invalidate_all PARAMS ((void)); | |
129 | ||
130 | static int overlay_is_mapped PARAMS ((struct obj_section *)); | |
131 | ||
132 | void list_overlays_command PARAMS ((char *, int)); | |
133 | ||
134 | void map_overlay_command PARAMS ((char *, int)); | |
135 | ||
136 | void unmap_overlay_command PARAMS ((char *, int)); | |
137 | ||
138 | static void overlay_auto_command PARAMS ((char *, int)); | |
139 | ||
140 | static void overlay_manual_command PARAMS ((char *, int)); | |
141 | ||
142 | static void overlay_off_command PARAMS ((char *, int)); | |
143 | ||
144 | static void overlay_load_command PARAMS ((char *, int)); | |
145 | ||
146 | static void overlay_command PARAMS ((char *, int)); | |
147 | ||
148 | static void simple_free_overlay_table PARAMS ((void)); | |
149 | ||
150 | static void read_target_long_array PARAMS ((CORE_ADDR, unsigned int *, int)); | |
151 | ||
152 | static int simple_read_overlay_table PARAMS ((void)); | |
153 | ||
154 | static int simple_overlay_update_1 PARAMS ((struct obj_section *)); | |
155 | ||
392a587b JM |
156 | static void add_filename_language PARAMS ((char *ext, enum language lang)); |
157 | ||
158 | static void set_ext_lang_command PARAMS ((char *args, int from_tty)); | |
159 | ||
160 | static void info_ext_lang_command PARAMS ((char *args, int from_tty)); | |
161 | ||
162 | static void init_filename_language_table PARAMS ((void)); | |
163 | ||
c906108c SS |
164 | void _initialize_symfile PARAMS ((void)); |
165 | ||
166 | /* List of all available sym_fns. On gdb startup, each object file reader | |
167 | calls add_symtab_fns() to register information on each format it is | |
168 | prepared to read. */ | |
169 | ||
170 | static struct sym_fns *symtab_fns = NULL; | |
171 | ||
172 | /* Flag for whether user will be reloading symbols multiple times. | |
173 | Defaults to ON for VxWorks, otherwise OFF. */ | |
174 | ||
175 | #ifdef SYMBOL_RELOADING_DEFAULT | |
176 | int symbol_reloading = SYMBOL_RELOADING_DEFAULT; | |
177 | #else | |
178 | int symbol_reloading = 0; | |
179 | #endif | |
180 | ||
181 | /* If non-zero, then on HP-UX (i.e., platforms that use somsolib.c), | |
182 | this variable is interpreted as a threshhold. If adding a new | |
183 | library's symbol table to those already known to the debugger would | |
184 | exceed this threshhold, then the shlib's symbols are not added. | |
185 | ||
186 | If non-zero on other platforms, shared library symbols will be added | |
187 | automatically when the inferior is created, new libraries are loaded, | |
188 | or when attaching to the inferior. This is almost always what users | |
189 | will want to have happen; but for very large programs, the startup | |
190 | time will be excessive, and so if this is a problem, the user can | |
191 | clear this flag and then add the shared library symbols as needed. | |
192 | Note that there is a potential for confusion, since if the shared | |
193 | library symbols are not loaded, commands like "info fun" will *not* | |
194 | report all the functions that are actually present. | |
195 | ||
196 | Note that HP-UX interprets this variable to mean, "threshhold size | |
197 | in megabytes, where zero means never add". Other platforms interpret | |
198 | this variable to mean, "always add if non-zero, never add if zero." | |
c5aa993b | 199 | */ |
c906108c SS |
200 | |
201 | int auto_solib_add = 1; | |
c906108c | 202 | \f |
c5aa993b | 203 | |
c906108c SS |
204 | /* Since this function is called from within qsort, in an ANSI environment |
205 | it must conform to the prototype for qsort, which specifies that the | |
206 | comparison function takes two "void *" pointers. */ | |
207 | ||
208 | static int | |
209 | compare_symbols (s1p, s2p) | |
210 | const PTR s1p; | |
211 | const PTR s2p; | |
212 | { | |
213 | register struct symbol **s1, **s2; | |
214 | ||
215 | s1 = (struct symbol **) s1p; | |
216 | s2 = (struct symbol **) s2p; | |
217 | ||
218 | return (STRCMP (SYMBOL_NAME (*s1), SYMBOL_NAME (*s2))); | |
219 | } | |
220 | ||
221 | /* | |
222 | ||
c5aa993b | 223 | LOCAL FUNCTION |
c906108c | 224 | |
c5aa993b | 225 | compare_psymbols -- compare two partial symbols by name |
c906108c | 226 | |
c5aa993b | 227 | DESCRIPTION |
c906108c | 228 | |
c5aa993b JM |
229 | Given pointers to pointers to two partial symbol table entries, |
230 | compare them by name and return -N, 0, or +N (ala strcmp). | |
231 | Typically used by sorting routines like qsort(). | |
c906108c | 232 | |
c5aa993b | 233 | NOTES |
c906108c | 234 | |
c5aa993b JM |
235 | Does direct compare of first two characters before punting |
236 | and passing to strcmp for longer compares. Note that the | |
237 | original version had a bug whereby two null strings or two | |
238 | identically named one character strings would return the | |
239 | comparison of memory following the null byte. | |
c906108c SS |
240 | |
241 | */ | |
242 | ||
243 | static int | |
244 | compare_psymbols (s1p, s2p) | |
245 | const PTR s1p; | |
246 | const PTR s2p; | |
247 | { | |
248 | register char *st1 = SYMBOL_NAME (*(struct partial_symbol **) s1p); | |
249 | register char *st2 = SYMBOL_NAME (*(struct partial_symbol **) s2p); | |
250 | ||
251 | if ((st1[0] - st2[0]) || !st1[0]) | |
252 | { | |
253 | return (st1[0] - st2[0]); | |
254 | } | |
255 | else if ((st1[1] - st2[1]) || !st1[1]) | |
256 | { | |
257 | return (st1[1] - st2[1]); | |
258 | } | |
259 | else | |
260 | { | |
261 | /* Note: I replaced the STRCMP line (commented out below) | |
262 | * with a simpler "strcmp()" which compares the 2 strings | |
263 | * from the beginning. (STRCMP is a macro which first compares | |
264 | * the initial characters, then falls back on strcmp). | |
265 | * The reason is that the STRCMP line was tickling a C compiler | |
266 | * bug on HP-UX 10.30, which is avoided with the simpler | |
267 | * code. The performance gain from the more complicated code | |
268 | * is negligible, given that we have already checked the | |
269 | * initial 2 characters above. I reported the compiler bug, | |
270 | * and once it is fixed the original line can be put back. RT | |
271 | */ | |
272 | /* return ( STRCMP (st1 + 2, st2 + 2)); */ | |
c5aa993b | 273 | return (strcmp (st1, st2)); |
c906108c SS |
274 | } |
275 | } | |
276 | ||
277 | void | |
278 | sort_pst_symbols (pst) | |
279 | struct partial_symtab *pst; | |
280 | { | |
281 | /* Sort the global list; don't sort the static list */ | |
282 | ||
c5aa993b JM |
283 | qsort (pst->objfile->global_psymbols.list + pst->globals_offset, |
284 | pst->n_global_syms, sizeof (struct partial_symbol *), | |
c906108c SS |
285 | compare_psymbols); |
286 | } | |
287 | ||
288 | /* Call sort_block_syms to sort alphabetically the symbols of one block. */ | |
289 | ||
290 | void | |
291 | sort_block_syms (b) | |
292 | register struct block *b; | |
293 | { | |
294 | qsort (&BLOCK_SYM (b, 0), BLOCK_NSYMS (b), | |
295 | sizeof (struct symbol *), compare_symbols); | |
296 | } | |
297 | ||
298 | /* Call sort_symtab_syms to sort alphabetically | |
299 | the symbols of each block of one symtab. */ | |
300 | ||
301 | void | |
302 | sort_symtab_syms (s) | |
303 | register struct symtab *s; | |
304 | { | |
305 | register struct blockvector *bv; | |
306 | int nbl; | |
307 | int i; | |
308 | register struct block *b; | |
309 | ||
310 | if (s == 0) | |
311 | return; | |
312 | bv = BLOCKVECTOR (s); | |
313 | nbl = BLOCKVECTOR_NBLOCKS (bv); | |
314 | for (i = 0; i < nbl; i++) | |
315 | { | |
316 | b = BLOCKVECTOR_BLOCK (bv, i); | |
317 | if (BLOCK_SHOULD_SORT (b)) | |
318 | sort_block_syms (b); | |
319 | } | |
320 | } | |
321 | ||
322 | /* Make a null terminated copy of the string at PTR with SIZE characters in | |
323 | the obstack pointed to by OBSTACKP . Returns the address of the copy. | |
324 | Note that the string at PTR does not have to be null terminated, I.E. it | |
325 | may be part of a larger string and we are only saving a substring. */ | |
326 | ||
327 | char * | |
328 | obsavestring (ptr, size, obstackp) | |
329 | char *ptr; | |
330 | int size; | |
331 | struct obstack *obstackp; | |
332 | { | |
333 | register char *p = (char *) obstack_alloc (obstackp, size + 1); | |
334 | /* Open-coded memcpy--saves function call time. These strings are usually | |
335 | short. FIXME: Is this really still true with a compiler that can | |
336 | inline memcpy? */ | |
337 | { | |
338 | register char *p1 = ptr; | |
339 | register char *p2 = p; | |
340 | char *end = ptr + size; | |
341 | while (p1 != end) | |
342 | *p2++ = *p1++; | |
343 | } | |
344 | p[size] = 0; | |
345 | return p; | |
346 | } | |
347 | ||
348 | /* Concatenate strings S1, S2 and S3; return the new string. Space is found | |
349 | in the obstack pointed to by OBSTACKP. */ | |
350 | ||
351 | char * | |
352 | obconcat (obstackp, s1, s2, s3) | |
353 | struct obstack *obstackp; | |
354 | const char *s1, *s2, *s3; | |
355 | { | |
356 | register int len = strlen (s1) + strlen (s2) + strlen (s3) + 1; | |
357 | register char *val = (char *) obstack_alloc (obstackp, len); | |
358 | strcpy (val, s1); | |
359 | strcat (val, s2); | |
360 | strcat (val, s3); | |
361 | return val; | |
362 | } | |
363 | ||
364 | /* True if we are nested inside psymtab_to_symtab. */ | |
365 | ||
366 | int currently_reading_symtab = 0; | |
367 | ||
368 | static void | |
369 | decrement_reading_symtab (dummy) | |
370 | void *dummy; | |
371 | { | |
372 | currently_reading_symtab--; | |
373 | } | |
374 | ||
375 | /* Get the symbol table that corresponds to a partial_symtab. | |
376 | This is fast after the first time you do it. In fact, there | |
377 | is an even faster macro PSYMTAB_TO_SYMTAB that does the fast | |
378 | case inline. */ | |
379 | ||
380 | struct symtab * | |
381 | psymtab_to_symtab (pst) | |
382 | register struct partial_symtab *pst; | |
383 | { | |
384 | /* If it's been looked up before, return it. */ | |
385 | if (pst->symtab) | |
386 | return pst->symtab; | |
387 | ||
388 | /* If it has not yet been read in, read it. */ | |
389 | if (!pst->readin) | |
c5aa993b | 390 | { |
c906108c SS |
391 | struct cleanup *back_to = make_cleanup (decrement_reading_symtab, NULL); |
392 | currently_reading_symtab++; | |
393 | (*pst->read_symtab) (pst); | |
394 | do_cleanups (back_to); | |
395 | } | |
396 | ||
397 | return pst->symtab; | |
398 | } | |
399 | ||
400 | /* Initialize entry point information for this objfile. */ | |
401 | ||
402 | void | |
403 | init_entry_point_info (objfile) | |
404 | struct objfile *objfile; | |
405 | { | |
406 | /* Save startup file's range of PC addresses to help blockframe.c | |
407 | decide where the bottom of the stack is. */ | |
408 | ||
c5aa993b | 409 | if (bfd_get_file_flags (objfile->obfd) & EXEC_P) |
c906108c SS |
410 | { |
411 | /* Executable file -- record its entry point so we'll recognize | |
c5aa993b JM |
412 | the startup file because it contains the entry point. */ |
413 | objfile->ei.entry_point = bfd_get_start_address (objfile->obfd); | |
c906108c SS |
414 | } |
415 | else | |
416 | { | |
417 | /* Examination of non-executable.o files. Short-circuit this stuff. */ | |
c5aa993b | 418 | objfile->ei.entry_point = INVALID_ENTRY_POINT; |
c906108c | 419 | } |
c5aa993b JM |
420 | objfile->ei.entry_file_lowpc = INVALID_ENTRY_LOWPC; |
421 | objfile->ei.entry_file_highpc = INVALID_ENTRY_HIGHPC; | |
422 | objfile->ei.entry_func_lowpc = INVALID_ENTRY_LOWPC; | |
423 | objfile->ei.entry_func_highpc = INVALID_ENTRY_HIGHPC; | |
424 | objfile->ei.main_func_lowpc = INVALID_ENTRY_LOWPC; | |
425 | objfile->ei.main_func_highpc = INVALID_ENTRY_HIGHPC; | |
c906108c SS |
426 | } |
427 | ||
428 | /* Get current entry point address. */ | |
429 | ||
430 | CORE_ADDR | |
c5aa993b | 431 | entry_point_address () |
c906108c SS |
432 | { |
433 | return symfile_objfile ? symfile_objfile->ei.entry_point : 0; | |
434 | } | |
435 | ||
436 | /* Remember the lowest-addressed loadable section we've seen. | |
437 | This function is called via bfd_map_over_sections. | |
438 | ||
439 | In case of equal vmas, the section with the largest size becomes the | |
440 | lowest-addressed loadable section. | |
441 | ||
442 | If the vmas and sizes are equal, the last section is considered the | |
443 | lowest-addressed loadable section. */ | |
444 | ||
445 | void | |
446 | find_lowest_section (abfd, sect, obj) | |
447 | bfd *abfd; | |
448 | asection *sect; | |
449 | PTR obj; | |
450 | { | |
c5aa993b | 451 | asection **lowest = (asection **) obj; |
c906108c SS |
452 | |
453 | if (0 == (bfd_get_section_flags (abfd, sect) & SEC_LOAD)) | |
454 | return; | |
455 | if (!*lowest) | |
456 | *lowest = sect; /* First loadable section */ | |
457 | else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect)) | |
458 | *lowest = sect; /* A lower loadable section */ | |
459 | else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect) | |
460 | && (bfd_section_size (abfd, (*lowest)) | |
461 | <= bfd_section_size (abfd, sect))) | |
462 | *lowest = sect; | |
463 | } | |
464 | ||
465 | /* Parse the user's idea of an offset for dynamic linking, into our idea | |
466 | of how to represent it for fast symbol reading. This is the default | |
467 | version of the sym_fns.sym_offsets function for symbol readers that | |
468 | don't need to do anything special. It allocates a section_offsets table | |
469 | for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */ | |
470 | ||
d4f3574e | 471 | void |
2acceee2 | 472 | default_symfile_offsets (objfile, addrs) |
c906108c | 473 | struct objfile *objfile; |
2acceee2 | 474 | struct section_addr_info *addrs; |
c906108c | 475 | { |
c906108c SS |
476 | int i; |
477 | ||
478 | objfile->num_sections = SECT_OFF_MAX; | |
d4f3574e | 479 | objfile->section_offsets = (struct section_offsets *) |
c5aa993b | 480 | obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS); |
d4f3574e | 481 | memset (objfile->section_offsets, 0, SIZEOF_SECTION_OFFSETS); |
c906108c | 482 | |
2acceee2 JM |
483 | /* If user explicitly specified values for data and bss, set them here. */ |
484 | ||
485 | if (addrs->text_addr) | |
486 | ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT) = addrs->text_addr; | |
487 | if (addrs->data_addr) | |
488 | ANOFFSET (objfile->section_offsets, SECT_OFF_DATA) = addrs->data_addr; | |
489 | if (addrs->bss_addr) | |
490 | ANOFFSET (objfile->section_offsets, SECT_OFF_BSS) = addrs->bss_addr; | |
491 | ||
492 | /* Now calculate offsets for other sections. */ | |
493 | for (i = 0; i < MAX_SECTIONS && addrs->other[i].name; i++) | |
494 | { | |
495 | struct other_sections *osp ; | |
496 | ||
497 | osp = &addrs->other[i] ; | |
498 | if (addrs->other[i].addr == 0) | |
499 | continue; | |
500 | #if 0 | |
501 | if (strcmp (".text", osp->name) == 0) | |
502 | SECT_OFF_TEXT = osp->sectindex ; | |
503 | else if (strcmp (".data", osp->name) == 0) | |
504 | SECT_OFF_DATA = osp->sectindex ; | |
505 | else if (strcmp (".bss", osp->name) == 0) | |
506 | SECT_OFF_BSS = osp->sectindex ; | |
507 | #endif | |
508 | /* Record all sections in offsets */ | |
509 | ANOFFSET (objfile->section_offsets, osp->sectindex) = osp->addr; | |
510 | } | |
c906108c SS |
511 | } |
512 | ||
513 | ||
514 | /* Process a symbol file, as either the main file or as a dynamically | |
515 | loaded file. | |
516 | ||
96baa820 JM |
517 | OBJFILE is where the symbols are to be read from. |
518 | ||
519 | ADDR is the address where the text segment was loaded, unless the | |
520 | objfile is the main symbol file, in which case it is zero. | |
521 | ||
522 | MAINLINE is nonzero if this is the main symbol file, or zero if | |
523 | it's an extra symbol file such as dynamically loaded code. | |
524 | ||
525 | VERBO is nonzero if the caller has printed a verbose message about | |
526 | the symbol reading (and complaints can be more terse about it). */ | |
c906108c SS |
527 | |
528 | void | |
2acceee2 | 529 | syms_from_objfile (objfile, addrs, mainline, verbo) |
c906108c | 530 | struct objfile *objfile; |
2acceee2 | 531 | struct section_addr_info *addrs; |
c906108c SS |
532 | int mainline; |
533 | int verbo; | |
534 | { | |
535 | struct section_offsets *section_offsets; | |
2acceee2 JM |
536 | asection *lower_sect; |
537 | asection *sect; | |
538 | CORE_ADDR lower_offset; | |
539 | struct section_addr_info local_addr; | |
c906108c | 540 | struct cleanup *old_chain; |
2acceee2 JM |
541 | int i; |
542 | ||
543 | /* If ADDRS is NULL, initialize the local section_addr_info struct and | |
544 | point ADDRS to it. We now establish the convention that an addr of | |
545 | zero means no load address was specified. */ | |
546 | ||
547 | if (addrs == NULL) | |
548 | { | |
549 | memset (&local_addr, 0, sizeof (local_addr)); | |
550 | addrs = &local_addr; | |
551 | } | |
c906108c SS |
552 | |
553 | init_entry_point_info (objfile); | |
554 | find_sym_fns (objfile); | |
555 | ||
556 | /* Make sure that partially constructed symbol tables will be cleaned up | |
557 | if an error occurs during symbol reading. */ | |
558 | old_chain = make_cleanup ((make_cleanup_func) free_objfile, objfile); | |
559 | ||
c5aa993b | 560 | if (mainline) |
c906108c SS |
561 | { |
562 | /* We will modify the main symbol table, make sure that all its users | |
c5aa993b | 563 | will be cleaned up if an error occurs during symbol reading. */ |
c906108c SS |
564 | make_cleanup ((make_cleanup_func) clear_symtab_users, 0); |
565 | ||
566 | /* Since no error yet, throw away the old symbol table. */ | |
567 | ||
568 | if (symfile_objfile != NULL) | |
569 | { | |
570 | free_objfile (symfile_objfile); | |
571 | symfile_objfile = NULL; | |
572 | } | |
573 | ||
574 | /* Currently we keep symbols from the add-symbol-file command. | |
c5aa993b JM |
575 | If the user wants to get rid of them, they should do "symbol-file" |
576 | without arguments first. Not sure this is the best behavior | |
577 | (PR 2207). */ | |
c906108c | 578 | |
c5aa993b | 579 | (*objfile->sf->sym_new_init) (objfile); |
c906108c SS |
580 | } |
581 | ||
582 | /* Convert addr into an offset rather than an absolute address. | |
583 | We find the lowest address of a loaded segment in the objfile, | |
53a5351d | 584 | and assume that <addr> is where that got loaded. |
c906108c | 585 | |
53a5351d JM |
586 | We no longer warn if the lowest section is not a text segment (as |
587 | happens for the PA64 port. */ | |
c906108c SS |
588 | if (mainline) |
589 | { | |
2acceee2 JM |
590 | /* No offset from objfile addresses. */ |
591 | addrs -> text_addr = 0; | |
592 | addrs -> data_addr = 0; | |
593 | addrs -> bss_addr = 0; | |
c906108c SS |
594 | } |
595 | else | |
596 | { | |
2acceee2 JM |
597 | /* Find lowest loadable section to be used as starting point for |
598 | continguous sections. FIXME!! won't work without call to find | |
599 | .text first, but this assumes text is lowest section. */ | |
600 | lower_sect = bfd_get_section_by_name (objfile->obfd, ".text"); | |
601 | if (lower_sect == NULL) | |
c906108c | 602 | bfd_map_over_sections (objfile->obfd, find_lowest_section, |
2acceee2 JM |
603 | (PTR) &lower_sect); |
604 | if (lower_sect == NULL) | |
c906108c SS |
605 | warning ("no loadable sections found in added symbol-file %s", |
606 | objfile->name); | |
2acceee2 JM |
607 | else if ((bfd_get_section_flags (objfile->obfd, lower_sect) & SEC_CODE) |
608 | == 0) | |
609 | warning ("Lowest section in %s is %s at %s", | |
610 | objfile->name, | |
611 | bfd_section_name (objfile->obfd, lower_sect), | |
612 | paddr (bfd_section_vma (objfile->obfd, lower_sect))); | |
613 | if (lower_sect != NULL) | |
614 | lower_offset = bfd_section_vma (objfile->obfd, lower_sect); | |
615 | else | |
616 | lower_offset = 0; | |
617 | ||
618 | /* Calculate offsets for the loadable sections. | |
619 | FIXME! Sections must be in order of increasing loadable section | |
620 | so that contiguous sections can use the lower-offset!!! | |
621 | ||
622 | Adjust offsets if the segments are not contiguous. | |
623 | If the section is contiguous, its offset should be set to | |
624 | the offset of the highest loadable section lower than it | |
625 | (the loadable section directly below it in memory). | |
626 | this_offset = lower_offset = lower_addr - lower_orig_addr */ | |
627 | ||
628 | /* FIXME: These sections will not need special treatment because ALL | |
629 | sections are in the other sections table */ | |
630 | ||
631 | if (addrs->text_addr != 0) | |
632 | { | |
633 | sect = bfd_get_section_by_name (objfile->obfd, ".text"); | |
634 | if (sect) | |
635 | { | |
636 | addrs->text_addr -= bfd_section_vma (objfile->obfd, sect); | |
637 | lower_offset = addrs->text_addr; | |
638 | } | |
639 | } | |
640 | else | |
641 | /* ??? who's below me? */ | |
642 | addrs->text_addr = lower_offset; | |
643 | ||
644 | if (addrs->data_addr != 0) | |
645 | { | |
646 | sect = bfd_get_section_by_name (objfile->obfd, ".data"); | |
647 | if (sect) | |
648 | { | |
649 | addrs->data_addr -= bfd_section_vma (objfile->obfd, sect); | |
650 | lower_offset = addrs->data_addr; | |
651 | } | |
652 | } | |
653 | else | |
654 | addrs->data_addr = lower_offset; | |
655 | ||
656 | if (addrs->bss_addr != 0) | |
657 | { | |
658 | sect = bfd_get_section_by_name (objfile->obfd, ".bss"); | |
659 | if (sect) | |
660 | { | |
661 | addrs->bss_addr -= bfd_section_vma (objfile->obfd, sect); | |
662 | lower_offset = addrs->bss_addr; | |
663 | } | |
664 | } | |
665 | else | |
666 | addrs->bss_addr = lower_offset; | |
667 | ||
668 | /* Now calculate offsets for other sections. */ | |
669 | for (i=0 ; i < MAX_SECTIONS && addrs->other[i].name; i++) | |
670 | { | |
671 | ||
672 | if (addrs->other[i].addr != 0) | |
673 | { | |
674 | sect=bfd_get_section_by_name(objfile->obfd, addrs->other[i].name); | |
675 | if (sect) | |
676 | { | |
677 | addrs->other[i].addr -= bfd_section_vma (objfile->obfd, sect); | |
678 | lower_offset = addrs->other[i].addr; | |
679 | addrs->other[i].sectindex = sect->index ; | |
680 | } | |
681 | else | |
682 | { | |
683 | warning ("section %s not found in %s", addrs->other[i].name, | |
684 | objfile->name); | |
685 | addrs->other[i].addr = 0; | |
686 | } | |
687 | } | |
688 | else | |
689 | addrs->other[i].addr = lower_offset; | |
690 | } | |
c906108c SS |
691 | } |
692 | ||
693 | /* Initialize symbol reading routines for this objfile, allow complaints to | |
694 | appear for this new file, and record how verbose to be, then do the | |
695 | initial symbol reading for this file. */ | |
696 | ||
c5aa993b | 697 | (*objfile->sf->sym_init) (objfile); |
c906108c SS |
698 | clear_complaints (1, verbo); |
699 | ||
2acceee2 | 700 | (*objfile->sf->sym_offsets) (objfile, addrs); |
c906108c SS |
701 | |
702 | #ifndef IBM6000_TARGET | |
703 | /* This is a SVR4/SunOS specific hack, I think. In any event, it | |
704 | screws RS/6000. sym_offsets should be doing this sort of thing, | |
705 | because it knows the mapping between bfd sections and | |
706 | section_offsets. */ | |
707 | /* This is a hack. As far as I can tell, section offsets are not | |
708 | target dependent. They are all set to addr with a couple of | |
709 | exceptions. The exceptions are sysvr4 shared libraries, whose | |
710 | offsets are kept in solib structures anyway and rs6000 xcoff | |
711 | which handles shared libraries in a completely unique way. | |
712 | ||
713 | Section offsets are built similarly, except that they are built | |
714 | by adding addr in all cases because there is no clear mapping | |
715 | from section_offsets into actual sections. Note that solib.c | |
96baa820 | 716 | has a different algorithm for finding section offsets. |
c906108c SS |
717 | |
718 | These should probably all be collapsed into some target | |
719 | independent form of shared library support. FIXME. */ | |
720 | ||
2acceee2 | 721 | if (addrs) |
c906108c SS |
722 | { |
723 | struct obj_section *s; | |
724 | ||
2acceee2 JM |
725 | /* Map section offsets in "addr" back to the object's |
726 | sections by comparing the section names with bfd's | |
727 | section names. Then adjust the section address by | |
728 | the offset. */ /* for gdb/13815 */ | |
729 | ||
96baa820 | 730 | ALL_OBJFILE_OSECTIONS (objfile, s) |
c906108c | 731 | { |
2acceee2 JM |
732 | CORE_ADDR s_addr = 0; |
733 | int i; | |
734 | ||
735 | if (strcmp (s->the_bfd_section->name, ".text") == 0) | |
736 | s_addr = addrs->text_addr; | |
737 | else if (strcmp (s->the_bfd_section->name, ".data") == 0) | |
738 | s_addr = addrs->data_addr; | |
739 | else if (strcmp (s->the_bfd_section->name, ".bss") == 0) | |
740 | s_addr = addrs->bss_addr; | |
741 | else | |
742 | for (i = 0; !s_addr && addrs->other[i].name; i++) | |
743 | if (strcmp (s->the_bfd_section->name, addrs->other[i].name) == 0) | |
744 | s_addr = addrs->other[i].addr; /* end added for gdb/13815 */ | |
745 | ||
c906108c | 746 | s->addr -= s->offset; |
2acceee2 | 747 | s->addr += s_addr; |
c906108c | 748 | s->endaddr -= s->offset; |
2acceee2 JM |
749 | s->endaddr += s_addr; |
750 | s->offset += s_addr; | |
c906108c SS |
751 | } |
752 | } | |
753 | #endif /* not IBM6000_TARGET */ | |
754 | ||
96baa820 | 755 | (*objfile->sf->sym_read) (objfile, mainline); |
c906108c SS |
756 | |
757 | if (!have_partial_symbols () && !have_full_symbols ()) | |
758 | { | |
759 | wrap_here (""); | |
760 | printf_filtered ("(no debugging symbols found)..."); | |
761 | wrap_here (""); | |
762 | } | |
763 | ||
764 | /* Don't allow char * to have a typename (else would get caddr_t). | |
765 | Ditto void *. FIXME: Check whether this is now done by all the | |
766 | symbol readers themselves (many of them now do), and if so remove | |
767 | it from here. */ | |
768 | ||
769 | TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0; | |
770 | TYPE_NAME (lookup_pointer_type (builtin_type_void)) = 0; | |
771 | ||
772 | /* Mark the objfile has having had initial symbol read attempted. Note | |
773 | that this does not mean we found any symbols... */ | |
774 | ||
c5aa993b | 775 | objfile->flags |= OBJF_SYMS; |
c906108c SS |
776 | |
777 | /* Discard cleanups as symbol reading was successful. */ | |
778 | ||
779 | discard_cleanups (old_chain); | |
780 | ||
96baa820 JM |
781 | /* Call this after reading in a new symbol table to give target |
782 | dependant code a crack at the new symbols. For instance, this | |
783 | could be used to update the values of target-specific symbols GDB | |
784 | needs to keep track of (such as _sigtramp, or whatever). */ | |
c906108c SS |
785 | |
786 | TARGET_SYMFILE_POSTREAD (objfile); | |
787 | } | |
788 | ||
789 | /* Perform required actions after either reading in the initial | |
790 | symbols for a new objfile, or mapping in the symbols from a reusable | |
791 | objfile. */ | |
c5aa993b | 792 | |
c906108c SS |
793 | void |
794 | new_symfile_objfile (objfile, mainline, verbo) | |
795 | struct objfile *objfile; | |
796 | int mainline; | |
797 | int verbo; | |
798 | { | |
799 | ||
800 | /* If this is the main symbol file we have to clean up all users of the | |
801 | old main symbol file. Otherwise it is sufficient to fixup all the | |
802 | breakpoints that may have been redefined by this symbol file. */ | |
803 | if (mainline) | |
804 | { | |
805 | /* OK, make it the "real" symbol file. */ | |
806 | symfile_objfile = objfile; | |
807 | ||
808 | clear_symtab_users (); | |
809 | } | |
810 | else | |
811 | { | |
812 | breakpoint_re_set (); | |
813 | } | |
814 | ||
815 | /* We're done reading the symbol file; finish off complaints. */ | |
816 | clear_complaints (0, verbo); | |
817 | } | |
818 | ||
819 | /* Process a symbol file, as either the main file or as a dynamically | |
820 | loaded file. | |
821 | ||
822 | NAME is the file name (which will be tilde-expanded and made | |
823 | absolute herein) (but we don't free or modify NAME itself). | |
824 | FROM_TTY says how verbose to be. MAINLINE specifies whether this | |
825 | is the main symbol file, or whether it's an extra symbol file such | |
826 | as dynamically loaded code. If !mainline, ADDR is the address | |
827 | where the text segment was loaded. | |
828 | ||
c906108c SS |
829 | Upon success, returns a pointer to the objfile that was added. |
830 | Upon failure, jumps back to command level (never returns). */ | |
831 | ||
832 | struct objfile * | |
2df3850c | 833 | symbol_file_add (name, from_tty, addrs, mainline, flags) |
c906108c SS |
834 | char *name; |
835 | int from_tty; | |
2acceee2 | 836 | struct section_addr_info *addrs; |
c906108c | 837 | int mainline; |
2acceee2 | 838 | int flags; |
c906108c SS |
839 | { |
840 | struct objfile *objfile; | |
841 | struct partial_symtab *psymtab; | |
842 | bfd *abfd; | |
843 | ||
844 | /* Open a bfd for the file, and give user a chance to burp if we'd be | |
845 | interactively wiping out any existing symbols. */ | |
846 | ||
847 | abfd = symfile_bfd_open (name); | |
848 | ||
849 | if ((have_full_symbols () || have_partial_symbols ()) | |
850 | && mainline | |
851 | && from_tty | |
852 | && !query ("Load new symbol table from \"%s\"? ", name)) | |
c5aa993b | 853 | error ("Not confirmed."); |
c906108c | 854 | |
2df3850c | 855 | objfile = allocate_objfile (abfd, flags); |
c906108c SS |
856 | |
857 | /* If the objfile uses a mapped symbol file, and we have a psymtab for | |
858 | it, then skip reading any symbols at this time. */ | |
859 | ||
c5aa993b | 860 | if ((objfile->flags & OBJF_MAPPED) && (objfile->flags & OBJF_SYMS)) |
c906108c SS |
861 | { |
862 | /* We mapped in an existing symbol table file that already has had | |
c5aa993b JM |
863 | initial symbol reading performed, so we can skip that part. Notify |
864 | the user that instead of reading the symbols, they have been mapped. | |
865 | */ | |
c906108c SS |
866 | if (from_tty || info_verbose) |
867 | { | |
868 | printf_filtered ("Mapped symbols for %s...", name); | |
869 | wrap_here (""); | |
870 | gdb_flush (gdb_stdout); | |
871 | } | |
872 | init_entry_point_info (objfile); | |
873 | find_sym_fns (objfile); | |
874 | } | |
875 | else | |
876 | { | |
877 | /* We either created a new mapped symbol table, mapped an existing | |
c5aa993b JM |
878 | symbol table file which has not had initial symbol reading |
879 | performed, or need to read an unmapped symbol table. */ | |
c906108c SS |
880 | if (from_tty || info_verbose) |
881 | { | |
882 | if (pre_add_symbol_hook) | |
883 | pre_add_symbol_hook (name); | |
884 | else | |
885 | { | |
886 | printf_filtered ("Reading symbols from %s...", name); | |
887 | wrap_here (""); | |
888 | gdb_flush (gdb_stdout); | |
889 | } | |
890 | } | |
2acceee2 | 891 | syms_from_objfile (objfile, addrs, mainline, from_tty); |
c906108c SS |
892 | } |
893 | ||
894 | /* We now have at least a partial symbol table. Check to see if the | |
895 | user requested that all symbols be read on initial access via either | |
896 | the gdb startup command line or on a per symbol file basis. Expand | |
897 | all partial symbol tables for this objfile if so. */ | |
898 | ||
2acceee2 | 899 | if ((flags & OBJF_READNOW) || readnow_symbol_files) |
c906108c SS |
900 | { |
901 | if (from_tty || info_verbose) | |
902 | { | |
903 | printf_filtered ("expanding to full symbols..."); | |
904 | wrap_here (""); | |
905 | gdb_flush (gdb_stdout); | |
906 | } | |
907 | ||
c5aa993b | 908 | for (psymtab = objfile->psymtabs; |
c906108c | 909 | psymtab != NULL; |
c5aa993b | 910 | psymtab = psymtab->next) |
c906108c SS |
911 | { |
912 | psymtab_to_symtab (psymtab); | |
913 | } | |
914 | } | |
915 | ||
916 | if (from_tty || info_verbose) | |
917 | { | |
918 | if (post_add_symbol_hook) | |
c5aa993b | 919 | post_add_symbol_hook (); |
c906108c | 920 | else |
c5aa993b JM |
921 | { |
922 | printf_filtered ("done.\n"); | |
923 | gdb_flush (gdb_stdout); | |
924 | } | |
c906108c SS |
925 | } |
926 | ||
927 | new_symfile_objfile (objfile, mainline, from_tty); | |
928 | ||
11cf8741 JM |
929 | if (target_new_objfile_hook) |
930 | target_new_objfile_hook (objfile); | |
c906108c SS |
931 | |
932 | return (objfile); | |
933 | } | |
934 | ||
935 | /* This is the symbol-file command. Read the file, analyze its | |
936 | symbols, and add a struct symtab to a symtab list. The syntax of | |
937 | the command is rather bizarre--(1) buildargv implements various | |
938 | quoting conventions which are undocumented and have little or | |
939 | nothing in common with the way things are quoted (or not quoted) | |
940 | elsewhere in GDB, (2) options are used, which are not generally | |
941 | used in GDB (perhaps "set mapped on", "set readnow on" would be | |
942 | better), (3) the order of options matters, which is contrary to GNU | |
943 | conventions (because it is confusing and inconvenient). */ | |
944 | ||
945 | void | |
946 | symbol_file_command (args, from_tty) | |
947 | char *args; | |
948 | int from_tty; | |
949 | { | |
950 | char **argv; | |
951 | char *name = NULL; | |
c5aa993b | 952 | CORE_ADDR text_relocation = 0; /* text_relocation */ |
c906108c | 953 | struct cleanup *cleanups; |
2df3850c | 954 | int flags = OBJF_USERLOADED; |
c906108c SS |
955 | |
956 | dont_repeat (); | |
957 | ||
958 | if (args == NULL) | |
959 | { | |
960 | if ((have_full_symbols () || have_partial_symbols ()) | |
961 | && from_tty | |
962 | && !query ("Discard symbol table from `%s'? ", | |
c5aa993b | 963 | symfile_objfile->name)) |
c906108c SS |
964 | error ("Not confirmed."); |
965 | free_all_objfiles (); | |
966 | ||
967 | /* solib descriptors may have handles to objfiles. Since their | |
968 | storage has just been released, we'd better wipe the solib | |
969 | descriptors as well. | |
c5aa993b | 970 | */ |
c906108c SS |
971 | #if defined(SOLIB_RESTART) |
972 | SOLIB_RESTART (); | |
973 | #endif | |
974 | ||
975 | symfile_objfile = NULL; | |
976 | if (from_tty) | |
977 | { | |
978 | printf_unfiltered ("No symbol file now.\n"); | |
979 | } | |
980 | #ifdef HPUXHPPA | |
981 | RESET_HP_UX_GLOBALS (); | |
982 | #endif | |
983 | } | |
984 | else | |
985 | { | |
986 | if ((argv = buildargv (args)) == NULL) | |
987 | { | |
988 | nomem (0); | |
989 | } | |
7a292a7a | 990 | cleanups = make_cleanup_freeargv (argv); |
c906108c SS |
991 | while (*argv != NULL) |
992 | { | |
993 | if (STREQ (*argv, "-mapped")) | |
994 | { | |
2acceee2 | 995 | flags |= OBJF_MAPPED; |
c906108c SS |
996 | } |
997 | else if (STREQ (*argv, "-readnow")) | |
998 | { | |
2acceee2 | 999 | flags |= OBJF_READNOW; |
c906108c SS |
1000 | } |
1001 | else if (**argv == '-') | |
1002 | { | |
1003 | error ("unknown option `%s'", *argv); | |
1004 | } | |
1005 | else | |
1006 | { | |
c5aa993b | 1007 | char *p; |
c906108c | 1008 | |
c5aa993b | 1009 | name = *argv; |
c906108c | 1010 | |
c5aa993b JM |
1011 | /* this is for rombug remote only, to get the text relocation by |
1012 | using link command */ | |
1013 | p = strrchr (name, '/'); | |
1014 | if (p != NULL) | |
1015 | p++; | |
1016 | else | |
1017 | p = name; | |
c906108c | 1018 | |
c5aa993b | 1019 | target_link (p, &text_relocation); |
c906108c | 1020 | |
c5aa993b JM |
1021 | if (text_relocation == (CORE_ADDR) 0) |
1022 | return; | |
a0b3c4fd | 1023 | else if (text_relocation == (CORE_ADDR) -1) |
c5aa993b | 1024 | { |
2df3850c | 1025 | symbol_file_add (name, from_tty, NULL, 1, flags); |
c906108c | 1026 | #ifdef HPUXHPPA |
c5aa993b | 1027 | RESET_HP_UX_GLOBALS (); |
c906108c | 1028 | #endif |
c5aa993b JM |
1029 | } |
1030 | else | |
2acceee2 JM |
1031 | { |
1032 | struct section_addr_info section_addrs; | |
1033 | memset (§ion_addrs, 0, sizeof (section_addrs)); | |
1034 | section_addrs.text_addr = (CORE_ADDR) text_relocation; | |
2df3850c | 1035 | symbol_file_add (name, from_tty, §ion_addrs, 0, flags); |
2acceee2 | 1036 | } |
c906108c SS |
1037 | |
1038 | /* Getting new symbols may change our opinion about what is | |
c5aa993b | 1039 | frameless. */ |
c906108c SS |
1040 | reinit_frame_cache (); |
1041 | ||
c5aa993b | 1042 | set_initial_language (); |
c906108c SS |
1043 | } |
1044 | argv++; | |
1045 | } | |
1046 | ||
1047 | if (name == NULL) | |
1048 | { | |
1049 | error ("no symbol file name was specified"); | |
1050 | } | |
c5aa993b | 1051 | TUIDO (((TuiOpaqueFuncPtr) tuiDisplayMainFunction)); |
c906108c SS |
1052 | do_cleanups (cleanups); |
1053 | } | |
1054 | } | |
1055 | ||
1056 | /* Set the initial language. | |
1057 | ||
1058 | A better solution would be to record the language in the psymtab when reading | |
1059 | partial symbols, and then use it (if known) to set the language. This would | |
1060 | be a win for formats that encode the language in an easily discoverable place, | |
1061 | such as DWARF. For stabs, we can jump through hoops looking for specially | |
1062 | named symbols or try to intuit the language from the specific type of stabs | |
1063 | we find, but we can't do that until later when we read in full symbols. | |
1064 | FIXME. */ | |
1065 | ||
1066 | static void | |
1067 | set_initial_language () | |
1068 | { | |
1069 | struct partial_symtab *pst; | |
c5aa993b | 1070 | enum language lang = language_unknown; |
c906108c SS |
1071 | |
1072 | pst = find_main_psymtab (); | |
1073 | if (pst != NULL) | |
1074 | { | |
c5aa993b | 1075 | if (pst->filename != NULL) |
c906108c | 1076 | { |
c5aa993b JM |
1077 | lang = deduce_language_from_filename (pst->filename); |
1078 | } | |
c906108c SS |
1079 | if (lang == language_unknown) |
1080 | { | |
c5aa993b JM |
1081 | /* Make C the default language */ |
1082 | lang = language_c; | |
c906108c SS |
1083 | } |
1084 | set_language (lang); | |
1085 | expected_language = current_language; /* Don't warn the user */ | |
1086 | } | |
1087 | } | |
1088 | ||
1089 | /* Open file specified by NAME and hand it off to BFD for preliminary | |
1090 | analysis. Result is a newly initialized bfd *, which includes a newly | |
1091 | malloc'd` copy of NAME (tilde-expanded and made absolute). | |
1092 | In case of trouble, error() is called. */ | |
1093 | ||
1094 | bfd * | |
1095 | symfile_bfd_open (name) | |
1096 | char *name; | |
1097 | { | |
1098 | bfd *sym_bfd; | |
1099 | int desc; | |
1100 | char *absolute_name; | |
1101 | ||
1102 | ||
1103 | ||
1104 | name = tilde_expand (name); /* Returns 1st new malloc'd copy */ | |
1105 | ||
1106 | /* Look down path for it, allocate 2nd new malloc'd copy. */ | |
1107 | desc = openp (getenv ("PATH"), 1, name, O_RDONLY | O_BINARY, 0, &absolute_name); | |
1108 | #if defined(__GO32__) || defined(_WIN32) | |
1109 | if (desc < 0) | |
1110 | { | |
1111 | char *exename = alloca (strlen (name) + 5); | |
1112 | strcat (strcpy (exename, name), ".exe"); | |
1113 | desc = openp (getenv ("PATH"), 1, exename, O_RDONLY | O_BINARY, | |
c5aa993b | 1114 | 0, &absolute_name); |
c906108c SS |
1115 | } |
1116 | #endif | |
1117 | if (desc < 0) | |
1118 | { | |
1119 | make_cleanup (free, name); | |
1120 | perror_with_name (name); | |
1121 | } | |
1122 | free (name); /* Free 1st new malloc'd copy */ | |
1123 | name = absolute_name; /* Keep 2nd malloc'd copy in bfd */ | |
c5aa993b | 1124 | /* It'll be freed in free_objfile(). */ |
c906108c SS |
1125 | |
1126 | sym_bfd = bfd_fdopenr (name, gnutarget, desc); | |
1127 | if (!sym_bfd) | |
1128 | { | |
1129 | close (desc); | |
1130 | make_cleanup (free, name); | |
1131 | error ("\"%s\": can't open to read symbols: %s.", name, | |
1132 | bfd_errmsg (bfd_get_error ())); | |
1133 | } | |
1134 | sym_bfd->cacheable = true; | |
1135 | ||
1136 | if (!bfd_check_format (sym_bfd, bfd_object)) | |
1137 | { | |
1138 | /* FIXME: should be checking for errors from bfd_close (for one thing, | |
c5aa993b JM |
1139 | on error it does not free all the storage associated with the |
1140 | bfd). */ | |
c906108c SS |
1141 | bfd_close (sym_bfd); /* This also closes desc */ |
1142 | make_cleanup (free, name); | |
1143 | error ("\"%s\": can't read symbols: %s.", name, | |
1144 | bfd_errmsg (bfd_get_error ())); | |
1145 | } | |
1146 | return (sym_bfd); | |
1147 | } | |
1148 | ||
1149 | /* Link a new symtab_fns into the global symtab_fns list. Called on gdb | |
1150 | startup by the _initialize routine in each object file format reader, | |
1151 | to register information about each format the the reader is prepared | |
1152 | to handle. */ | |
1153 | ||
1154 | void | |
1155 | add_symtab_fns (sf) | |
1156 | struct sym_fns *sf; | |
1157 | { | |
1158 | sf->next = symtab_fns; | |
1159 | symtab_fns = sf; | |
1160 | } | |
1161 | ||
1162 | ||
1163 | /* Initialize to read symbols from the symbol file sym_bfd. It either | |
1164 | returns or calls error(). The result is an initialized struct sym_fns | |
1165 | in the objfile structure, that contains cached information about the | |
1166 | symbol file. */ | |
1167 | ||
1168 | static void | |
1169 | find_sym_fns (objfile) | |
1170 | struct objfile *objfile; | |
1171 | { | |
1172 | struct sym_fns *sf; | |
c5aa993b JM |
1173 | enum bfd_flavour our_flavour = bfd_get_flavour (objfile->obfd); |
1174 | char *our_target = bfd_get_target (objfile->obfd); | |
c906108c SS |
1175 | |
1176 | /* Special kludge for RS/6000 and PowerMac. See xcoffread.c. */ | |
1177 | if (STREQ (our_target, "aixcoff-rs6000") || | |
1178 | STREQ (our_target, "xcoff-powermac")) | |
c5aa993b | 1179 | our_flavour = (enum bfd_flavour) -1; |
c906108c SS |
1180 | |
1181 | /* Special kludge for apollo. See dstread.c. */ | |
1182 | if (STREQN (our_target, "apollo", 6)) | |
c5aa993b | 1183 | our_flavour = (enum bfd_flavour) -2; |
c906108c | 1184 | |
c5aa993b | 1185 | for (sf = symtab_fns; sf != NULL; sf = sf->next) |
c906108c | 1186 | { |
c5aa993b | 1187 | if (our_flavour == sf->sym_flavour) |
c906108c | 1188 | { |
c5aa993b | 1189 | objfile->sf = sf; |
c906108c SS |
1190 | return; |
1191 | } | |
1192 | } | |
1193 | error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.", | |
c5aa993b | 1194 | bfd_get_target (objfile->obfd)); |
c906108c SS |
1195 | } |
1196 | \f | |
1197 | /* This function runs the load command of our current target. */ | |
1198 | ||
1199 | static void | |
1200 | load_command (arg, from_tty) | |
1201 | char *arg; | |
1202 | int from_tty; | |
1203 | { | |
1204 | if (arg == NULL) | |
1205 | arg = get_exec_file (1); | |
1206 | target_load (arg, from_tty); | |
1207 | } | |
1208 | ||
1209 | /* This version of "load" should be usable for any target. Currently | |
1210 | it is just used for remote targets, not inftarg.c or core files, | |
1211 | on the theory that only in that case is it useful. | |
1212 | ||
1213 | Avoiding xmodem and the like seems like a win (a) because we don't have | |
1214 | to worry about finding it, and (b) On VMS, fork() is very slow and so | |
1215 | we don't want to run a subprocess. On the other hand, I'm not sure how | |
1216 | performance compares. */ | |
917317f4 JM |
1217 | |
1218 | static int download_write_size = 512; | |
1219 | static int validate_download = 0; | |
1220 | ||
c906108c | 1221 | void |
917317f4 | 1222 | generic_load (char *args, int from_tty) |
c906108c | 1223 | { |
c906108c SS |
1224 | asection *s; |
1225 | bfd *loadfile_bfd; | |
1226 | time_t start_time, end_time; /* Start and end times of download */ | |
1227 | unsigned long data_count = 0; /* Number of bytes transferred to memory */ | |
917317f4 JM |
1228 | unsigned long write_count = 0; /* Number of writes needed. */ |
1229 | unsigned long load_offset; /* offset to add to vma for each section */ | |
1230 | char *filename; | |
1231 | struct cleanup *old_cleanups; | |
1232 | char *offptr; | |
c2d11a7d JM |
1233 | CORE_ADDR total_size = 0; |
1234 | CORE_ADDR total_sent = 0; | |
917317f4 JM |
1235 | |
1236 | /* Parse the input argument - the user can specify a load offset as | |
1237 | a second argument. */ | |
1238 | filename = xmalloc (strlen (args) + 1); | |
1239 | old_cleanups = make_cleanup (free, filename); | |
1240 | strcpy (filename, args); | |
1241 | offptr = strchr (filename, ' '); | |
1242 | if (offptr != NULL) | |
1243 | { | |
1244 | char *endptr; | |
1245 | load_offset = strtoul (offptr, &endptr, 0); | |
1246 | if (offptr == endptr) | |
1247 | error ("Invalid download offset:%s\n", offptr); | |
1248 | *offptr = '\0'; | |
1249 | } | |
c906108c SS |
1250 | else |
1251 | load_offset = 0; | |
1252 | ||
917317f4 | 1253 | /* Open the file for loading. */ |
c906108c SS |
1254 | loadfile_bfd = bfd_openr (filename, gnutarget); |
1255 | if (loadfile_bfd == NULL) | |
1256 | { | |
1257 | perror_with_name (filename); | |
1258 | return; | |
1259 | } | |
917317f4 | 1260 | |
c906108c SS |
1261 | /* FIXME: should be checking for errors from bfd_close (for one thing, |
1262 | on error it does not free all the storage associated with the | |
1263 | bfd). */ | |
917317f4 | 1264 | make_cleanup ((make_cleanup_func) bfd_close, loadfile_bfd); |
c906108c | 1265 | |
c5aa993b | 1266 | if (!bfd_check_format (loadfile_bfd, bfd_object)) |
c906108c SS |
1267 | { |
1268 | error ("\"%s\" is not an object file: %s", filename, | |
1269 | bfd_errmsg (bfd_get_error ())); | |
1270 | } | |
c5aa993b | 1271 | |
c2d11a7d JM |
1272 | for (s = loadfile_bfd->sections; s; s = s->next) |
1273 | if (s->flags & SEC_LOAD) | |
1274 | total_size += bfd_get_section_size_before_reloc (s); | |
1275 | ||
c906108c SS |
1276 | start_time = time (NULL); |
1277 | ||
c5aa993b JM |
1278 | for (s = loadfile_bfd->sections; s; s = s->next) |
1279 | { | |
1280 | if (s->flags & SEC_LOAD) | |
1281 | { | |
917317f4 | 1282 | CORE_ADDR size = bfd_get_section_size_before_reloc (s); |
c5aa993b JM |
1283 | if (size > 0) |
1284 | { | |
1285 | char *buffer; | |
1286 | struct cleanup *old_chain; | |
917317f4 JM |
1287 | CORE_ADDR lma = s->lma + load_offset; |
1288 | CORE_ADDR block_size; | |
c5aa993b | 1289 | int err; |
917317f4 JM |
1290 | const char *sect_name = bfd_get_section_name (loadfile_bfd, s); |
1291 | CORE_ADDR sent; | |
c5aa993b | 1292 | |
917317f4 JM |
1293 | if (download_write_size > 0 && size > download_write_size) |
1294 | block_size = download_write_size; | |
1295 | else | |
1296 | block_size = size; | |
c5aa993b JM |
1297 | |
1298 | buffer = xmalloc (size); | |
1299 | old_chain = make_cleanup (free, buffer); | |
1300 | ||
c5aa993b JM |
1301 | /* Is this really necessary? I guess it gives the user something |
1302 | to look at during a long download. */ | |
917317f4 JM |
1303 | fprintf_unfiltered (gdb_stdout, |
1304 | "Loading section %s, size 0x%s lma 0x%s\n", | |
1305 | sect_name, paddr_nz (size), paddr_nz (lma)); | |
c5aa993b JM |
1306 | |
1307 | bfd_get_section_contents (loadfile_bfd, s, buffer, 0, size); | |
1308 | ||
c5aa993b JM |
1309 | sent = 0; |
1310 | do | |
1311 | { | |
917317f4 JM |
1312 | CORE_ADDR len; |
1313 | CORE_ADDR this_transfer = size - sent; | |
1314 | if (this_transfer >= block_size) | |
1315 | this_transfer = block_size; | |
1316 | len = target_write_memory_partial (lma, buffer, | |
1317 | this_transfer, &err); | |
c5aa993b JM |
1318 | if (err) |
1319 | break; | |
917317f4 JM |
1320 | if (validate_download) |
1321 | { | |
1322 | /* Broken memories and broken monitors manifest | |
1323 | themselves here when bring new computers to | |
1324 | life. This doubles already slow downloads. */ | |
1325 | /* NOTE: cagney/1999-10-18: A more efficient | |
1326 | implementation might add a verify_memory() | |
1327 | method to the target vector and then use | |
1328 | that. remote.c could implement that method | |
1329 | using the ``qCRC'' packet. */ | |
1330 | char *check = xmalloc (len); | |
1331 | struct cleanup *verify_cleanups = make_cleanup (free, check); | |
1332 | if (target_read_memory (lma, check, len) != 0) | |
1333 | error ("Download verify read failed at 0x%s", | |
1334 | paddr (lma)); | |
1335 | if (memcmp (buffer, check, len) != 0) | |
1336 | error ("Download verify compare failed at 0x%s", | |
1337 | paddr (lma)); | |
1338 | do_cleanups (verify_cleanups); | |
1339 | } | |
c5aa993b JM |
1340 | data_count += len; |
1341 | lma += len; | |
1342 | buffer += len; | |
917317f4 JM |
1343 | write_count += 1; |
1344 | sent += len; | |
c2d11a7d | 1345 | total_sent += len; |
917317f4 JM |
1346 | if (quit_flag |
1347 | || (ui_load_progress_hook != NULL | |
1348 | && ui_load_progress_hook (sect_name, sent))) | |
1349 | error ("Canceled the download"); | |
c2d11a7d JM |
1350 | |
1351 | if (show_load_progress != NULL) | |
1352 | show_load_progress (sect_name, sent, size, total_sent, total_size); | |
917317f4 JM |
1353 | } |
1354 | while (sent < size); | |
c5aa993b JM |
1355 | |
1356 | if (err != 0) | |
917317f4 | 1357 | error ("Memory access error while loading section %s.", sect_name); |
c906108c | 1358 | |
c5aa993b JM |
1359 | do_cleanups (old_chain); |
1360 | } | |
1361 | } | |
c906108c SS |
1362 | } |
1363 | ||
1364 | end_time = time (NULL); | |
1365 | { | |
917317f4 | 1366 | CORE_ADDR entry; |
c5aa993b | 1367 | entry = bfd_get_start_address (loadfile_bfd); |
917317f4 JM |
1368 | fprintf_unfiltered (gdb_stdout, |
1369 | "Start address 0x%s , load size %ld\n", | |
1370 | paddr_nz (entry), data_count); | |
c906108c SS |
1371 | /* We were doing this in remote-mips.c, I suspect it is right |
1372 | for other targets too. */ | |
1373 | write_pc (entry); | |
1374 | } | |
1375 | ||
1376 | /* FIXME: are we supposed to call symbol_file_add or not? According to | |
1377 | a comment from remote-mips.c (where a call to symbol_file_add was | |
1378 | commented out), making the call confuses GDB if more than one file is | |
1379 | loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c | |
1380 | does. */ | |
1381 | ||
917317f4 JM |
1382 | print_transfer_performance (gdb_stdout, data_count, write_count, |
1383 | end_time - start_time); | |
c906108c SS |
1384 | |
1385 | do_cleanups (old_cleanups); | |
1386 | } | |
1387 | ||
1388 | /* Report how fast the transfer went. */ | |
1389 | ||
917317f4 JM |
1390 | /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being |
1391 | replaced by print_transfer_performance (with a very different | |
1392 | function signature). */ | |
1393 | ||
c906108c SS |
1394 | void |
1395 | report_transfer_performance (data_count, start_time, end_time) | |
c5aa993b JM |
1396 | unsigned long data_count; |
1397 | time_t start_time, end_time; | |
c906108c | 1398 | { |
917317f4 JM |
1399 | print_transfer_performance (gdb_stdout, data_count, end_time - start_time, 0); |
1400 | } | |
1401 | ||
1402 | void | |
1403 | print_transfer_performance (struct gdb_file *stream, | |
1404 | unsigned long data_count, | |
1405 | unsigned long write_count, | |
1406 | unsigned long time_count) | |
1407 | { | |
1408 | fprintf_unfiltered (stream, "Transfer rate: "); | |
1409 | if (time_count > 0) | |
1410 | fprintf_unfiltered (stream, "%ld bits/sec", (data_count * 8) / time_count); | |
c906108c | 1411 | else |
917317f4 JM |
1412 | fprintf_unfiltered (stream, "%ld bits in <1 sec", (data_count * 8)); |
1413 | if (write_count > 0) | |
1414 | fprintf_unfiltered (stream, ", %ld bytes/write", data_count / write_count); | |
1415 | fprintf_unfiltered (stream, ".\n"); | |
c906108c SS |
1416 | } |
1417 | ||
1418 | /* This function allows the addition of incrementally linked object files. | |
1419 | It does not modify any state in the target, only in the debugger. */ | |
1420 | ||
1421 | /* ARGSUSED */ | |
1422 | static void | |
1423 | add_symbol_file_command (args, from_tty) | |
1424 | char *args; | |
1425 | int from_tty; | |
1426 | { | |
1427 | char *name = NULL; | |
1428 | CORE_ADDR text_addr; | |
2df3850c | 1429 | int flags = OBJF_USERLOADED; |
c906108c | 1430 | char *arg; |
2acceee2 JM |
1431 | int expecting_option = 0; |
1432 | int option_index = 0; | |
1433 | int argcnt = 0; | |
1434 | int sec_num = 0; | |
1435 | int i; | |
1436 | struct | |
1437 | { | |
1438 | enum { OPT_SECTION } type; | |
1439 | char *name; | |
1440 | char *value; | |
1441 | } opt[SECT_OFF_MAX]; | |
1442 | struct section_addr_info section_addrs; | |
c5aa993b | 1443 | |
c906108c SS |
1444 | dont_repeat (); |
1445 | ||
1446 | if (args == NULL) | |
1447 | { | |
1448 | error ("add-symbol-file takes a file name and an address"); | |
1449 | } | |
1450 | ||
1451 | /* Make a copy of the string that we can safely write into. */ | |
1452 | ||
c2d11a7d | 1453 | args = xstrdup (args); |
c906108c SS |
1454 | make_cleanup (free, args); |
1455 | ||
2acceee2 JM |
1456 | /* Ensure section_addrs is initialized */ |
1457 | memset (§ion_addrs, 0, sizeof (section_addrs)); | |
1458 | ||
c906108c SS |
1459 | /* Pick off any -option args and the file name. */ |
1460 | ||
2acceee2 | 1461 | while (*args != '\000') |
c906108c | 1462 | { |
c5aa993b JM |
1463 | while (isspace (*args)) |
1464 | { | |
1465 | args++; | |
1466 | } | |
c906108c | 1467 | arg = args; |
c5aa993b JM |
1468 | while ((*args != '\000') && !isspace (*args)) |
1469 | { | |
1470 | args++; | |
1471 | } | |
c906108c SS |
1472 | if (*args != '\000') |
1473 | { | |
1474 | *args++ = '\000'; | |
1475 | } | |
1476 | if (*arg != '-') | |
1477 | { | |
2acceee2 JM |
1478 | if (expecting_option) |
1479 | { | |
1480 | opt[option_index++].value = arg; | |
1481 | expecting_option = 0; | |
1482 | } | |
1483 | else | |
1484 | { | |
1485 | switch (argcnt) | |
1486 | { | |
1487 | case 0: | |
1488 | name = arg; | |
1489 | break; | |
1490 | case 1: | |
1491 | opt[option_index].type = OPT_SECTION; | |
1492 | opt[option_index].name = ".text"; | |
1493 | opt[option_index++].value = arg; | |
1494 | break; | |
1495 | case 2: | |
1496 | opt[option_index].type = OPT_SECTION; | |
1497 | opt[option_index].name = ".data"; | |
1498 | opt[option_index++].value = arg; | |
1499 | break; | |
1500 | case 3: | |
1501 | opt[option_index].type = OPT_SECTION; | |
1502 | opt[option_index].name = ".bss"; | |
1503 | opt[option_index++].value = arg; | |
1504 | break; | |
1505 | default: | |
1506 | warning ("Too many arguments entered; see \"help add-symbol-file\" for command syntax."); | |
1507 | } | |
1508 | argcnt++; | |
1509 | } | |
c906108c SS |
1510 | } |
1511 | else if (STREQ (arg, "-mapped")) | |
1512 | { | |
2acceee2 | 1513 | flags |= OBJF_MAPPED; |
c906108c SS |
1514 | } |
1515 | else if (STREQ (arg, "-readnow")) | |
1516 | { | |
2acceee2 | 1517 | flags |= OBJF_READNOW; |
c906108c | 1518 | } |
2acceee2 JM |
1519 | else if (STREQN (arg, "-T", 2)) |
1520 | { | |
1521 | if (option_index >= SECT_OFF_MAX) | |
1522 | { | |
1523 | warning ("Number of options exceeds maximum allowed."); | |
1524 | } | |
1525 | else | |
1526 | { | |
1527 | expecting_option = 1; | |
1528 | opt[option_index].type = OPT_SECTION; | |
1529 | opt[option_index].name = arg + 2; | |
1530 | } | |
1531 | } | |
1532 | else | |
1533 | { | |
1534 | error ("Unknown option `%s'", arg); | |
1535 | } | |
c906108c SS |
1536 | } |
1537 | ||
c906108c SS |
1538 | if (name == NULL) |
1539 | { | |
1540 | error ("add-symbol-file takes a file name"); | |
1541 | } | |
1542 | name = tilde_expand (name); | |
1543 | make_cleanup (free, name); | |
1544 | ||
2acceee2 | 1545 | if (option_index > 0) |
c906108c | 1546 | { |
2acceee2 JM |
1547 | /* Print the prompt for the query below. |
1548 | We have to split this up into 3 print statements because | |
1549 | local_hex_string returns a local static string. */ | |
1550 | ||
1551 | printf_filtered ("add symbol table from file \"%s\" at\n", name); | |
1552 | for (i = 0; i < option_index; i++) | |
1553 | { | |
1554 | switch (opt[i].type) | |
1555 | { | |
1556 | case OPT_SECTION: | |
1557 | { | |
1558 | CORE_ADDR addr; | |
1559 | char *val = opt[i].value; | |
1560 | char *sec = opt[i].name; | |
1561 | ||
1562 | val = opt[i].value; | |
1563 | if (val[0] == '0' && val[1] == 'x') | |
1564 | addr = strtoul (val+2, NULL, 16); | |
1565 | else | |
1566 | addr = strtoul (val, NULL, 10); | |
1567 | ||
1568 | if (strcmp (sec, ".text") == 0) | |
1569 | section_addrs.text_addr = addr; | |
1570 | else if (strcmp (sec, ".data") == 0) | |
1571 | section_addrs.data_addr = addr; | |
1572 | else if (strcmp (sec, ".bss") == 0) | |
1573 | section_addrs.bss_addr = addr; | |
1574 | /* Add the section to the others even if it is a | |
1575 | text data or bss section. This is redundent but | |
1576 | eventually, none will be given special treatment */ | |
1577 | { | |
c2d11a7d | 1578 | section_addrs.other[sec_num].name = xstrdup (sec); |
2acceee2 JM |
1579 | make_cleanup (free, section_addrs.other[sec_num].name); |
1580 | section_addrs.other[sec_num++].addr = addr; | |
1581 | printf_filtered ("\t%s_addr = %s\n", | |
1582 | sec, | |
1583 | local_hex_string ((unsigned long)addr)); | |
1584 | } | |
1585 | ||
1586 | /* The object's sections are initialized when a | |
1587 | call is made to build_objfile_section_table (objfile). | |
1588 | This happens in reread_symbols. | |
1589 | At this point, we don't know what file type this is, | |
1590 | so we can't determine what section names are valid. */ | |
1591 | } | |
1592 | break; | |
1593 | default: | |
1594 | complain (&unknown_option_complaint, opt[i].name); | |
1595 | } | |
1596 | } | |
1597 | /* Eventually, these hard coded names will be obsolete */ | |
1598 | /* All the addresses will be on the others section */ | |
c906108c SS |
1599 | } |
1600 | else | |
1601 | { | |
2acceee2 JM |
1602 | CORE_ADDR text_addr; |
1603 | target_link (name, &text_addr); | |
a0b3c4fd | 1604 | if (text_addr == (CORE_ADDR) -1) |
2acceee2 JM |
1605 | error("Don't know how to get text start location for this file"); |
1606 | section_addrs.text_addr = text_addr; | |
1607 | section_addrs.data_addr = 0; | |
1608 | section_addrs.bss_addr = 0; | |
1609 | printf_filtered("add symbol table from file \"%s\" at text_addr = %s?\n", | |
1610 | name, local_hex_string ((unsigned long)text_addr)); | |
1611 | } | |
1612 | if (from_tty && (!query ("%s", ""))) | |
c906108c SS |
1613 | error ("Not confirmed."); |
1614 | ||
2df3850c | 1615 | symbol_file_add (name, from_tty, §ion_addrs, 0, flags); |
c906108c SS |
1616 | |
1617 | /* Getting new symbols may change our opinion about what is | |
1618 | frameless. */ | |
1619 | reinit_frame_cache (); | |
1620 | } | |
1621 | \f | |
1622 | static void | |
c5aa993b | 1623 | add_shared_symbol_files_command (args, from_tty) |
c906108c SS |
1624 | char *args; |
1625 | int from_tty; | |
1626 | { | |
1627 | #ifdef ADD_SHARED_SYMBOL_FILES | |
1628 | ADD_SHARED_SYMBOL_FILES (args, from_tty); | |
1629 | #else | |
1630 | error ("This command is not available in this configuration of GDB."); | |
c5aa993b | 1631 | #endif |
c906108c SS |
1632 | } |
1633 | \f | |
1634 | /* Re-read symbols if a symbol-file has changed. */ | |
1635 | void | |
1636 | reread_symbols () | |
1637 | { | |
1638 | struct objfile *objfile; | |
1639 | long new_modtime; | |
1640 | int reread_one = 0; | |
1641 | struct stat new_statbuf; | |
1642 | int res; | |
1643 | ||
1644 | /* With the addition of shared libraries, this should be modified, | |
1645 | the load time should be saved in the partial symbol tables, since | |
1646 | different tables may come from different source files. FIXME. | |
1647 | This routine should then walk down each partial symbol table | |
1648 | and see if the symbol table that it originates from has been changed */ | |
1649 | ||
c5aa993b JM |
1650 | for (objfile = object_files; objfile; objfile = objfile->next) |
1651 | { | |
1652 | if (objfile->obfd) | |
1653 | { | |
c906108c | 1654 | #ifdef IBM6000_TARGET |
c5aa993b JM |
1655 | /* If this object is from a shared library, then you should |
1656 | stat on the library name, not member name. */ | |
c906108c | 1657 | |
c5aa993b JM |
1658 | if (objfile->obfd->my_archive) |
1659 | res = stat (objfile->obfd->my_archive->filename, &new_statbuf); | |
1660 | else | |
c906108c | 1661 | #endif |
c5aa993b JM |
1662 | res = stat (objfile->name, &new_statbuf); |
1663 | if (res != 0) | |
c906108c | 1664 | { |
c5aa993b JM |
1665 | /* FIXME, should use print_sys_errmsg but it's not filtered. */ |
1666 | printf_filtered ("`%s' has disappeared; keeping its symbols.\n", | |
1667 | objfile->name); | |
1668 | continue; | |
c906108c | 1669 | } |
c5aa993b JM |
1670 | new_modtime = new_statbuf.st_mtime; |
1671 | if (new_modtime != objfile->mtime) | |
c906108c | 1672 | { |
c5aa993b JM |
1673 | struct cleanup *old_cleanups; |
1674 | struct section_offsets *offsets; | |
1675 | int num_offsets; | |
c5aa993b JM |
1676 | char *obfd_filename; |
1677 | ||
1678 | printf_filtered ("`%s' has changed; re-reading symbols.\n", | |
1679 | objfile->name); | |
1680 | ||
1681 | /* There are various functions like symbol_file_add, | |
1682 | symfile_bfd_open, syms_from_objfile, etc., which might | |
1683 | appear to do what we want. But they have various other | |
1684 | effects which we *don't* want. So we just do stuff | |
1685 | ourselves. We don't worry about mapped files (for one thing, | |
1686 | any mapped file will be out of date). */ | |
1687 | ||
1688 | /* If we get an error, blow away this objfile (not sure if | |
1689 | that is the correct response for things like shared | |
1690 | libraries). */ | |
1691 | old_cleanups = make_cleanup ((make_cleanup_func) free_objfile, | |
1692 | objfile); | |
1693 | /* We need to do this whenever any symbols go away. */ | |
1694 | make_cleanup ((make_cleanup_func) clear_symtab_users, 0); | |
1695 | ||
1696 | /* Clean up any state BFD has sitting around. We don't need | |
1697 | to close the descriptor but BFD lacks a way of closing the | |
1698 | BFD without closing the descriptor. */ | |
1699 | obfd_filename = bfd_get_filename (objfile->obfd); | |
1700 | if (!bfd_close (objfile->obfd)) | |
1701 | error ("Can't close BFD for %s: %s", objfile->name, | |
1702 | bfd_errmsg (bfd_get_error ())); | |
1703 | objfile->obfd = bfd_openr (obfd_filename, gnutarget); | |
1704 | if (objfile->obfd == NULL) | |
1705 | error ("Can't open %s to read symbols.", objfile->name); | |
1706 | /* bfd_openr sets cacheable to true, which is what we want. */ | |
1707 | if (!bfd_check_format (objfile->obfd, bfd_object)) | |
1708 | error ("Can't read symbols from %s: %s.", objfile->name, | |
1709 | bfd_errmsg (bfd_get_error ())); | |
1710 | ||
1711 | /* Save the offsets, we will nuke them with the rest of the | |
1712 | psymbol_obstack. */ | |
1713 | num_offsets = objfile->num_sections; | |
d4f3574e SS |
1714 | offsets = (struct section_offsets *) alloca (SIZEOF_SECTION_OFFSETS); |
1715 | memcpy (offsets, objfile->section_offsets, SIZEOF_SECTION_OFFSETS); | |
c5aa993b JM |
1716 | |
1717 | /* Nuke all the state that we will re-read. Much of the following | |
1718 | code which sets things to NULL really is necessary to tell | |
1719 | other parts of GDB that there is nothing currently there. */ | |
1720 | ||
1721 | /* FIXME: Do we have to free a whole linked list, or is this | |
1722 | enough? */ | |
1723 | if (objfile->global_psymbols.list) | |
1724 | mfree (objfile->md, objfile->global_psymbols.list); | |
1725 | memset (&objfile->global_psymbols, 0, | |
1726 | sizeof (objfile->global_psymbols)); | |
1727 | if (objfile->static_psymbols.list) | |
1728 | mfree (objfile->md, objfile->static_psymbols.list); | |
1729 | memset (&objfile->static_psymbols, 0, | |
1730 | sizeof (objfile->static_psymbols)); | |
1731 | ||
1732 | /* Free the obstacks for non-reusable objfiles */ | |
c2d11a7d | 1733 | free_bcache (&objfile->psymbol_cache); |
c5aa993b JM |
1734 | obstack_free (&objfile->psymbol_obstack, 0); |
1735 | obstack_free (&objfile->symbol_obstack, 0); | |
1736 | obstack_free (&objfile->type_obstack, 0); | |
1737 | objfile->sections = NULL; | |
1738 | objfile->symtabs = NULL; | |
1739 | objfile->psymtabs = NULL; | |
1740 | objfile->free_psymtabs = NULL; | |
1741 | objfile->msymbols = NULL; | |
1742 | objfile->minimal_symbol_count = 0; | |
1743 | objfile->fundamental_types = NULL; | |
1744 | if (objfile->sf != NULL) | |
1745 | { | |
1746 | (*objfile->sf->sym_finish) (objfile); | |
1747 | } | |
1748 | ||
1749 | /* We never make this a mapped file. */ | |
1750 | objfile->md = NULL; | |
1751 | /* obstack_specify_allocation also initializes the obstack so | |
1752 | it is empty. */ | |
1753 | obstack_specify_allocation (&objfile->psymbol_cache.cache, 0, 0, | |
1754 | xmalloc, free); | |
1755 | obstack_specify_allocation (&objfile->psymbol_obstack, 0, 0, | |
1756 | xmalloc, free); | |
1757 | obstack_specify_allocation (&objfile->symbol_obstack, 0, 0, | |
1758 | xmalloc, free); | |
1759 | obstack_specify_allocation (&objfile->type_obstack, 0, 0, | |
1760 | xmalloc, free); | |
1761 | if (build_objfile_section_table (objfile)) | |
1762 | { | |
1763 | error ("Can't find the file sections in `%s': %s", | |
1764 | objfile->name, bfd_errmsg (bfd_get_error ())); | |
1765 | } | |
1766 | ||
1767 | /* We use the same section offsets as from last time. I'm not | |
1768 | sure whether that is always correct for shared libraries. */ | |
1769 | objfile->section_offsets = (struct section_offsets *) | |
d4f3574e SS |
1770 | obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS); |
1771 | memcpy (objfile->section_offsets, offsets, SIZEOF_SECTION_OFFSETS); | |
c5aa993b JM |
1772 | objfile->num_sections = num_offsets; |
1773 | ||
1774 | /* What the hell is sym_new_init for, anyway? The concept of | |
1775 | distinguishing between the main file and additional files | |
1776 | in this way seems rather dubious. */ | |
1777 | if (objfile == symfile_objfile) | |
1778 | { | |
1779 | (*objfile->sf->sym_new_init) (objfile); | |
c906108c | 1780 | #ifdef HPUXHPPA |
c5aa993b | 1781 | RESET_HP_UX_GLOBALS (); |
c906108c | 1782 | #endif |
c5aa993b JM |
1783 | } |
1784 | ||
1785 | (*objfile->sf->sym_init) (objfile); | |
1786 | clear_complaints (1, 1); | |
1787 | /* The "mainline" parameter is a hideous hack; I think leaving it | |
1788 | zero is OK since dbxread.c also does what it needs to do if | |
1789 | objfile->global_psymbols.size is 0. */ | |
96baa820 | 1790 | (*objfile->sf->sym_read) (objfile, 0); |
c5aa993b JM |
1791 | if (!have_partial_symbols () && !have_full_symbols ()) |
1792 | { | |
1793 | wrap_here (""); | |
1794 | printf_filtered ("(no debugging symbols found)\n"); | |
1795 | wrap_here (""); | |
1796 | } | |
1797 | objfile->flags |= OBJF_SYMS; | |
1798 | ||
1799 | /* We're done reading the symbol file; finish off complaints. */ | |
1800 | clear_complaints (0, 1); | |
c906108c | 1801 | |
c5aa993b JM |
1802 | /* Getting new symbols may change our opinion about what is |
1803 | frameless. */ | |
c906108c | 1804 | |
c5aa993b | 1805 | reinit_frame_cache (); |
c906108c | 1806 | |
c5aa993b JM |
1807 | /* Discard cleanups as symbol reading was successful. */ |
1808 | discard_cleanups (old_cleanups); | |
c906108c | 1809 | |
c5aa993b JM |
1810 | /* If the mtime has changed between the time we set new_modtime |
1811 | and now, we *want* this to be out of date, so don't call stat | |
1812 | again now. */ | |
1813 | objfile->mtime = new_modtime; | |
1814 | reread_one = 1; | |
c906108c | 1815 | |
c5aa993b JM |
1816 | /* Call this after reading in a new symbol table to give target |
1817 | dependant code a crack at the new symbols. For instance, this | |
1818 | could be used to update the values of target-specific symbols GDB | |
1819 | needs to keep track of (such as _sigtramp, or whatever). */ | |
c906108c | 1820 | |
c5aa993b JM |
1821 | TARGET_SYMFILE_POSTREAD (objfile); |
1822 | } | |
c906108c SS |
1823 | } |
1824 | } | |
c906108c SS |
1825 | |
1826 | if (reread_one) | |
1827 | clear_symtab_users (); | |
1828 | } | |
c906108c SS |
1829 | \f |
1830 | ||
c5aa993b JM |
1831 | |
1832 | typedef struct | |
1833 | { | |
1834 | char *ext; | |
c906108c | 1835 | enum language lang; |
c5aa993b JM |
1836 | } |
1837 | filename_language; | |
c906108c | 1838 | |
c5aa993b | 1839 | static filename_language *filename_language_table; |
c906108c SS |
1840 | static int fl_table_size, fl_table_next; |
1841 | ||
1842 | static void | |
1843 | add_filename_language (ext, lang) | |
c5aa993b | 1844 | char *ext; |
c906108c SS |
1845 | enum language lang; |
1846 | { | |
1847 | if (fl_table_next >= fl_table_size) | |
1848 | { | |
1849 | fl_table_size += 10; | |
c5aa993b | 1850 | filename_language_table = realloc (filename_language_table, |
c906108c SS |
1851 | fl_table_size); |
1852 | } | |
1853 | ||
c5aa993b | 1854 | filename_language_table[fl_table_next].ext = strsave (ext); |
c906108c SS |
1855 | filename_language_table[fl_table_next].lang = lang; |
1856 | fl_table_next++; | |
1857 | } | |
1858 | ||
1859 | static char *ext_args; | |
1860 | ||
1861 | static void | |
1862 | set_ext_lang_command (args, from_tty) | |
1863 | char *args; | |
1864 | int from_tty; | |
1865 | { | |
1866 | int i; | |
1867 | char *cp = ext_args; | |
1868 | enum language lang; | |
1869 | ||
1870 | /* First arg is filename extension, starting with '.' */ | |
1871 | if (*cp != '.') | |
1872 | error ("'%s': Filename extension must begin with '.'", ext_args); | |
1873 | ||
1874 | /* Find end of first arg. */ | |
c5aa993b | 1875 | while (*cp && !isspace (*cp)) |
c906108c SS |
1876 | cp++; |
1877 | ||
1878 | if (*cp == '\0') | |
1879 | error ("'%s': two arguments required -- filename extension and language", | |
1880 | ext_args); | |
1881 | ||
1882 | /* Null-terminate first arg */ | |
c5aa993b | 1883 | *cp++ = '\0'; |
c906108c SS |
1884 | |
1885 | /* Find beginning of second arg, which should be a source language. */ | |
1886 | while (*cp && isspace (*cp)) | |
1887 | cp++; | |
1888 | ||
1889 | if (*cp == '\0') | |
1890 | error ("'%s': two arguments required -- filename extension and language", | |
1891 | ext_args); | |
1892 | ||
1893 | /* Lookup the language from among those we know. */ | |
1894 | lang = language_enum (cp); | |
1895 | ||
1896 | /* Now lookup the filename extension: do we already know it? */ | |
1897 | for (i = 0; i < fl_table_next; i++) | |
1898 | if (0 == strcmp (ext_args, filename_language_table[i].ext)) | |
1899 | break; | |
1900 | ||
1901 | if (i >= fl_table_next) | |
1902 | { | |
1903 | /* new file extension */ | |
1904 | add_filename_language (ext_args, lang); | |
1905 | } | |
1906 | else | |
1907 | { | |
1908 | /* redefining a previously known filename extension */ | |
1909 | ||
1910 | /* if (from_tty) */ | |
1911 | /* query ("Really make files of type %s '%s'?", */ | |
1912 | /* ext_args, language_str (lang)); */ | |
1913 | ||
1914 | free (filename_language_table[i].ext); | |
c5aa993b | 1915 | filename_language_table[i].ext = strsave (ext_args); |
c906108c SS |
1916 | filename_language_table[i].lang = lang; |
1917 | } | |
1918 | } | |
1919 | ||
1920 | static void | |
1921 | info_ext_lang_command (args, from_tty) | |
1922 | char *args; | |
c5aa993b | 1923 | int from_tty; |
c906108c SS |
1924 | { |
1925 | int i; | |
1926 | ||
1927 | printf_filtered ("Filename extensions and the languages they represent:"); | |
1928 | printf_filtered ("\n\n"); | |
1929 | for (i = 0; i < fl_table_next; i++) | |
c5aa993b JM |
1930 | printf_filtered ("\t%s\t- %s\n", |
1931 | filename_language_table[i].ext, | |
c906108c SS |
1932 | language_str (filename_language_table[i].lang)); |
1933 | } | |
1934 | ||
1935 | static void | |
1936 | init_filename_language_table () | |
1937 | { | |
1938 | if (fl_table_size == 0) /* protect against repetition */ | |
1939 | { | |
1940 | fl_table_size = 20; | |
1941 | fl_table_next = 0; | |
c5aa993b | 1942 | filename_language_table = |
c906108c | 1943 | xmalloc (fl_table_size * sizeof (*filename_language_table)); |
c5aa993b JM |
1944 | add_filename_language (".c", language_c); |
1945 | add_filename_language (".C", language_cplus); | |
1946 | add_filename_language (".cc", language_cplus); | |
1947 | add_filename_language (".cp", language_cplus); | |
1948 | add_filename_language (".cpp", language_cplus); | |
1949 | add_filename_language (".cxx", language_cplus); | |
1950 | add_filename_language (".c++", language_cplus); | |
1951 | add_filename_language (".java", language_java); | |
c906108c | 1952 | add_filename_language (".class", language_java); |
c5aa993b JM |
1953 | add_filename_language (".ch", language_chill); |
1954 | add_filename_language (".c186", language_chill); | |
1955 | add_filename_language (".c286", language_chill); | |
1956 | add_filename_language (".f", language_fortran); | |
1957 | add_filename_language (".F", language_fortran); | |
1958 | add_filename_language (".s", language_asm); | |
1959 | add_filename_language (".S", language_asm); | |
c906108c SS |
1960 | } |
1961 | } | |
1962 | ||
1963 | enum language | |
1964 | deduce_language_from_filename (filename) | |
1965 | char *filename; | |
1966 | { | |
1967 | int i; | |
1968 | char *cp; | |
1969 | ||
1970 | if (filename != NULL) | |
1971 | if ((cp = strrchr (filename, '.')) != NULL) | |
1972 | for (i = 0; i < fl_table_next; i++) | |
1973 | if (strcmp (cp, filename_language_table[i].ext) == 0) | |
1974 | return filename_language_table[i].lang; | |
1975 | ||
1976 | return language_unknown; | |
1977 | } | |
1978 | \f | |
1979 | /* allocate_symtab: | |
1980 | ||
1981 | Allocate and partly initialize a new symbol table. Return a pointer | |
1982 | to it. error() if no space. | |
1983 | ||
1984 | Caller must set these fields: | |
c5aa993b JM |
1985 | LINETABLE(symtab) |
1986 | symtab->blockvector | |
1987 | symtab->dirname | |
1988 | symtab->free_code | |
1989 | symtab->free_ptr | |
1990 | possibly free_named_symtabs (symtab->filename); | |
c906108c SS |
1991 | */ |
1992 | ||
1993 | struct symtab * | |
1994 | allocate_symtab (filename, objfile) | |
1995 | char *filename; | |
1996 | struct objfile *objfile; | |
1997 | { | |
1998 | register struct symtab *symtab; | |
1999 | ||
2000 | symtab = (struct symtab *) | |
c5aa993b | 2001 | obstack_alloc (&objfile->symbol_obstack, sizeof (struct symtab)); |
c906108c | 2002 | memset (symtab, 0, sizeof (*symtab)); |
c5aa993b JM |
2003 | symtab->filename = obsavestring (filename, strlen (filename), |
2004 | &objfile->symbol_obstack); | |
2005 | symtab->fullname = NULL; | |
2006 | symtab->language = deduce_language_from_filename (filename); | |
2007 | symtab->debugformat = obsavestring ("unknown", 7, | |
2008 | &objfile->symbol_obstack); | |
c906108c SS |
2009 | |
2010 | /* Hook it to the objfile it comes from */ | |
2011 | ||
c5aa993b JM |
2012 | symtab->objfile = objfile; |
2013 | symtab->next = objfile->symtabs; | |
2014 | objfile->symtabs = symtab; | |
c906108c SS |
2015 | |
2016 | /* FIXME: This should go away. It is only defined for the Z8000, | |
2017 | and the Z8000 definition of this macro doesn't have anything to | |
2018 | do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just | |
2019 | here for convenience. */ | |
2020 | #ifdef INIT_EXTRA_SYMTAB_INFO | |
2021 | INIT_EXTRA_SYMTAB_INFO (symtab); | |
2022 | #endif | |
2023 | ||
2024 | return (symtab); | |
2025 | } | |
2026 | ||
2027 | struct partial_symtab * | |
2028 | allocate_psymtab (filename, objfile) | |
2029 | char *filename; | |
2030 | struct objfile *objfile; | |
2031 | { | |
2032 | struct partial_symtab *psymtab; | |
2033 | ||
c5aa993b | 2034 | if (objfile->free_psymtabs) |
c906108c | 2035 | { |
c5aa993b JM |
2036 | psymtab = objfile->free_psymtabs; |
2037 | objfile->free_psymtabs = psymtab->next; | |
c906108c SS |
2038 | } |
2039 | else | |
2040 | psymtab = (struct partial_symtab *) | |
c5aa993b | 2041 | obstack_alloc (&objfile->psymbol_obstack, |
c906108c SS |
2042 | sizeof (struct partial_symtab)); |
2043 | ||
2044 | memset (psymtab, 0, sizeof (struct partial_symtab)); | |
c5aa993b JM |
2045 | psymtab->filename = obsavestring (filename, strlen (filename), |
2046 | &objfile->psymbol_obstack); | |
2047 | psymtab->symtab = NULL; | |
c906108c SS |
2048 | |
2049 | /* Prepend it to the psymtab list for the objfile it belongs to. | |
2050 | Psymtabs are searched in most recent inserted -> least recent | |
2051 | inserted order. */ | |
2052 | ||
c5aa993b JM |
2053 | psymtab->objfile = objfile; |
2054 | psymtab->next = objfile->psymtabs; | |
2055 | objfile->psymtabs = psymtab; | |
c906108c SS |
2056 | #if 0 |
2057 | { | |
2058 | struct partial_symtab **prev_pst; | |
c5aa993b JM |
2059 | psymtab->objfile = objfile; |
2060 | psymtab->next = NULL; | |
2061 | prev_pst = &(objfile->psymtabs); | |
c906108c | 2062 | while ((*prev_pst) != NULL) |
c5aa993b | 2063 | prev_pst = &((*prev_pst)->next); |
c906108c | 2064 | (*prev_pst) = psymtab; |
c5aa993b | 2065 | } |
c906108c | 2066 | #endif |
c5aa993b | 2067 | |
c906108c SS |
2068 | return (psymtab); |
2069 | } | |
2070 | ||
2071 | void | |
2072 | discard_psymtab (pst) | |
2073 | struct partial_symtab *pst; | |
2074 | { | |
2075 | struct partial_symtab **prev_pst; | |
2076 | ||
2077 | /* From dbxread.c: | |
2078 | Empty psymtabs happen as a result of header files which don't | |
2079 | have any symbols in them. There can be a lot of them. But this | |
2080 | check is wrong, in that a psymtab with N_SLINE entries but | |
2081 | nothing else is not empty, but we don't realize that. Fixing | |
2082 | that without slowing things down might be tricky. */ | |
2083 | ||
2084 | /* First, snip it out of the psymtab chain */ | |
2085 | ||
2086 | prev_pst = &(pst->objfile->psymtabs); | |
2087 | while ((*prev_pst) != pst) | |
2088 | prev_pst = &((*prev_pst)->next); | |
2089 | (*prev_pst) = pst->next; | |
2090 | ||
2091 | /* Next, put it on a free list for recycling */ | |
2092 | ||
2093 | pst->next = pst->objfile->free_psymtabs; | |
2094 | pst->objfile->free_psymtabs = pst; | |
2095 | } | |
c906108c | 2096 | \f |
c5aa993b | 2097 | |
c906108c SS |
2098 | /* Reset all data structures in gdb which may contain references to symbol |
2099 | table data. */ | |
2100 | ||
2101 | void | |
2102 | clear_symtab_users () | |
2103 | { | |
2104 | /* Someday, we should do better than this, by only blowing away | |
2105 | the things that really need to be blown. */ | |
2106 | clear_value_history (); | |
2107 | clear_displays (); | |
2108 | clear_internalvars (); | |
2109 | breakpoint_re_set (); | |
2110 | set_default_breakpoint (0, 0, 0, 0); | |
2111 | current_source_symtab = 0; | |
2112 | current_source_line = 0; | |
2113 | clear_pc_function_cache (); | |
11cf8741 JM |
2114 | if (target_new_objfile_hook) |
2115 | target_new_objfile_hook (NULL); | |
c906108c SS |
2116 | } |
2117 | ||
2118 | /* clear_symtab_users_once: | |
2119 | ||
2120 | This function is run after symbol reading, or from a cleanup. | |
2121 | If an old symbol table was obsoleted, the old symbol table | |
2122 | has been blown away, but the other GDB data structures that may | |
2123 | reference it have not yet been cleared or re-directed. (The old | |
2124 | symtab was zapped, and the cleanup queued, in free_named_symtab() | |
2125 | below.) | |
2126 | ||
2127 | This function can be queued N times as a cleanup, or called | |
2128 | directly; it will do all the work the first time, and then will be a | |
2129 | no-op until the next time it is queued. This works by bumping a | |
2130 | counter at queueing time. Much later when the cleanup is run, or at | |
2131 | the end of symbol processing (in case the cleanup is discarded), if | |
2132 | the queued count is greater than the "done-count", we do the work | |
2133 | and set the done-count to the queued count. If the queued count is | |
2134 | less than or equal to the done-count, we just ignore the call. This | |
2135 | is needed because reading a single .o file will often replace many | |
2136 | symtabs (one per .h file, for example), and we don't want to reset | |
2137 | the breakpoints N times in the user's face. | |
2138 | ||
2139 | The reason we both queue a cleanup, and call it directly after symbol | |
2140 | reading, is because the cleanup protects us in case of errors, but is | |
2141 | discarded if symbol reading is successful. */ | |
2142 | ||
2143 | #if 0 | |
2144 | /* FIXME: As free_named_symtabs is currently a big noop this function | |
2145 | is no longer needed. */ | |
2146 | static void | |
2147 | clear_symtab_users_once PARAMS ((void)); | |
2148 | ||
2149 | static int clear_symtab_users_queued; | |
2150 | static int clear_symtab_users_done; | |
2151 | ||
2152 | static void | |
2153 | clear_symtab_users_once () | |
2154 | { | |
2155 | /* Enforce once-per-`do_cleanups'-semantics */ | |
2156 | if (clear_symtab_users_queued <= clear_symtab_users_done) | |
2157 | return; | |
2158 | clear_symtab_users_done = clear_symtab_users_queued; | |
2159 | ||
2160 | clear_symtab_users (); | |
2161 | } | |
2162 | #endif | |
2163 | ||
2164 | /* Delete the specified psymtab, and any others that reference it. */ | |
2165 | ||
2166 | static void | |
2167 | cashier_psymtab (pst) | |
2168 | struct partial_symtab *pst; | |
2169 | { | |
2170 | struct partial_symtab *ps, *pprev = NULL; | |
2171 | int i; | |
2172 | ||
2173 | /* Find its previous psymtab in the chain */ | |
c5aa993b JM |
2174 | for (ps = pst->objfile->psymtabs; ps; ps = ps->next) |
2175 | { | |
2176 | if (ps == pst) | |
2177 | break; | |
2178 | pprev = ps; | |
2179 | } | |
c906108c | 2180 | |
c5aa993b JM |
2181 | if (ps) |
2182 | { | |
2183 | /* Unhook it from the chain. */ | |
2184 | if (ps == pst->objfile->psymtabs) | |
2185 | pst->objfile->psymtabs = ps->next; | |
2186 | else | |
2187 | pprev->next = ps->next; | |
2188 | ||
2189 | /* FIXME, we can't conveniently deallocate the entries in the | |
2190 | partial_symbol lists (global_psymbols/static_psymbols) that | |
2191 | this psymtab points to. These just take up space until all | |
2192 | the psymtabs are reclaimed. Ditto the dependencies list and | |
2193 | filename, which are all in the psymbol_obstack. */ | |
2194 | ||
2195 | /* We need to cashier any psymtab that has this one as a dependency... */ | |
2196 | again: | |
2197 | for (ps = pst->objfile->psymtabs; ps; ps = ps->next) | |
2198 | { | |
2199 | for (i = 0; i < ps->number_of_dependencies; i++) | |
2200 | { | |
2201 | if (ps->dependencies[i] == pst) | |
2202 | { | |
2203 | cashier_psymtab (ps); | |
2204 | goto again; /* Must restart, chain has been munged. */ | |
2205 | } | |
2206 | } | |
c906108c | 2207 | } |
c906108c | 2208 | } |
c906108c SS |
2209 | } |
2210 | ||
2211 | /* If a symtab or psymtab for filename NAME is found, free it along | |
2212 | with any dependent breakpoints, displays, etc. | |
2213 | Used when loading new versions of object modules with the "add-file" | |
2214 | command. This is only called on the top-level symtab or psymtab's name; | |
2215 | it is not called for subsidiary files such as .h files. | |
2216 | ||
2217 | Return value is 1 if we blew away the environment, 0 if not. | |
2218 | FIXME. The return valu appears to never be used. | |
2219 | ||
2220 | FIXME. I think this is not the best way to do this. We should | |
2221 | work on being gentler to the environment while still cleaning up | |
2222 | all stray pointers into the freed symtab. */ | |
2223 | ||
2224 | int | |
2225 | free_named_symtabs (name) | |
2226 | char *name; | |
2227 | { | |
2228 | #if 0 | |
2229 | /* FIXME: With the new method of each objfile having it's own | |
2230 | psymtab list, this function needs serious rethinking. In particular, | |
2231 | why was it ever necessary to toss psymtabs with specific compilation | |
2232 | unit filenames, as opposed to all psymtabs from a particular symbol | |
2233 | file? -- fnf | |
2234 | Well, the answer is that some systems permit reloading of particular | |
2235 | compilation units. We want to blow away any old info about these | |
2236 | compilation units, regardless of which objfiles they arrived in. --gnu. */ | |
2237 | ||
2238 | register struct symtab *s; | |
2239 | register struct symtab *prev; | |
2240 | register struct partial_symtab *ps; | |
2241 | struct blockvector *bv; | |
2242 | int blewit = 0; | |
2243 | ||
2244 | /* We only wack things if the symbol-reload switch is set. */ | |
2245 | if (!symbol_reloading) | |
2246 | return 0; | |
2247 | ||
2248 | /* Some symbol formats have trouble providing file names... */ | |
2249 | if (name == 0 || *name == '\0') | |
2250 | return 0; | |
2251 | ||
2252 | /* Look for a psymtab with the specified name. */ | |
2253 | ||
2254 | again2: | |
c5aa993b JM |
2255 | for (ps = partial_symtab_list; ps; ps = ps->next) |
2256 | { | |
2257 | if (STREQ (name, ps->filename)) | |
2258 | { | |
2259 | cashier_psymtab (ps); /* Blow it away...and its little dog, too. */ | |
2260 | goto again2; /* Must restart, chain has been munged */ | |
2261 | } | |
c906108c | 2262 | } |
c906108c SS |
2263 | |
2264 | /* Look for a symtab with the specified name. */ | |
2265 | ||
2266 | for (s = symtab_list; s; s = s->next) | |
2267 | { | |
2268 | if (STREQ (name, s->filename)) | |
2269 | break; | |
2270 | prev = s; | |
2271 | } | |
2272 | ||
2273 | if (s) | |
2274 | { | |
2275 | if (s == symtab_list) | |
2276 | symtab_list = s->next; | |
2277 | else | |
2278 | prev->next = s->next; | |
2279 | ||
2280 | /* For now, queue a delete for all breakpoints, displays, etc., whether | |
c5aa993b JM |
2281 | or not they depend on the symtab being freed. This should be |
2282 | changed so that only those data structures affected are deleted. */ | |
c906108c SS |
2283 | |
2284 | /* But don't delete anything if the symtab is empty. | |
c5aa993b JM |
2285 | This test is necessary due to a bug in "dbxread.c" that |
2286 | causes empty symtabs to be created for N_SO symbols that | |
2287 | contain the pathname of the object file. (This problem | |
2288 | has been fixed in GDB 3.9x). */ | |
c906108c SS |
2289 | |
2290 | bv = BLOCKVECTOR (s); | |
2291 | if (BLOCKVECTOR_NBLOCKS (bv) > 2 | |
2292 | || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) | |
2293 | || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK))) | |
2294 | { | |
2295 | complain (&oldsyms_complaint, name); | |
2296 | ||
2297 | clear_symtab_users_queued++; | |
2298 | make_cleanup (clear_symtab_users_once, 0); | |
2299 | blewit = 1; | |
c5aa993b JM |
2300 | } |
2301 | else | |
2302 | { | |
c906108c SS |
2303 | complain (&empty_symtab_complaint, name); |
2304 | } | |
2305 | ||
2306 | free_symtab (s); | |
2307 | } | |
2308 | else | |
2309 | { | |
2310 | /* It is still possible that some breakpoints will be affected | |
c5aa993b JM |
2311 | even though no symtab was found, since the file might have |
2312 | been compiled without debugging, and hence not be associated | |
2313 | with a symtab. In order to handle this correctly, we would need | |
2314 | to keep a list of text address ranges for undebuggable files. | |
2315 | For now, we do nothing, since this is a fairly obscure case. */ | |
c906108c SS |
2316 | ; |
2317 | } | |
2318 | ||
2319 | /* FIXME, what about the minimal symbol table? */ | |
2320 | return blewit; | |
2321 | #else | |
2322 | return (0); | |
2323 | #endif | |
2324 | } | |
2325 | \f | |
2326 | /* Allocate and partially fill a partial symtab. It will be | |
2327 | completely filled at the end of the symbol list. | |
2328 | ||
d4f3574e | 2329 | FILENAME is the name of the symbol-file we are reading from. */ |
c906108c SS |
2330 | |
2331 | struct partial_symtab * | |
2332 | start_psymtab_common (objfile, section_offsets, | |
2333 | filename, textlow, global_syms, static_syms) | |
2334 | struct objfile *objfile; | |
2335 | struct section_offsets *section_offsets; | |
2336 | char *filename; | |
2337 | CORE_ADDR textlow; | |
2338 | struct partial_symbol **global_syms; | |
2339 | struct partial_symbol **static_syms; | |
2340 | { | |
2341 | struct partial_symtab *psymtab; | |
2342 | ||
2343 | psymtab = allocate_psymtab (filename, objfile); | |
c5aa993b JM |
2344 | psymtab->section_offsets = section_offsets; |
2345 | psymtab->textlow = textlow; | |
2346 | psymtab->texthigh = psymtab->textlow; /* default */ | |
2347 | psymtab->globals_offset = global_syms - objfile->global_psymbols.list; | |
2348 | psymtab->statics_offset = static_syms - objfile->static_psymbols.list; | |
c906108c SS |
2349 | return (psymtab); |
2350 | } | |
2351 | \f | |
2352 | /* Add a symbol with a long value to a psymtab. | |
2353 | Since one arg is a struct, we pass in a ptr and deref it (sigh). */ | |
2354 | ||
2355 | void | |
2356 | add_psymbol_to_list (name, namelength, namespace, class, list, val, coreaddr, | |
2357 | language, objfile) | |
2358 | char *name; | |
2359 | int namelength; | |
2360 | namespace_enum namespace; | |
2361 | enum address_class class; | |
2362 | struct psymbol_allocation_list *list; | |
c5aa993b JM |
2363 | long val; /* Value as a long */ |
2364 | CORE_ADDR coreaddr; /* Value as a CORE_ADDR */ | |
c906108c SS |
2365 | enum language language; |
2366 | struct objfile *objfile; | |
2367 | { | |
2368 | register struct partial_symbol *psym; | |
2369 | char *buf = alloca (namelength + 1); | |
2370 | /* psymbol is static so that there will be no uninitialized gaps in the | |
2371 | structure which might contain random data, causing cache misses in | |
2372 | bcache. */ | |
2373 | static struct partial_symbol psymbol; | |
2374 | ||
2375 | /* Create local copy of the partial symbol */ | |
2376 | memcpy (buf, name, namelength); | |
2377 | buf[namelength] = '\0'; | |
2378 | SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, &objfile->psymbol_cache); | |
2379 | /* val and coreaddr are mutually exclusive, one of them *will* be zero */ | |
2380 | if (val != 0) | |
2381 | { | |
2382 | SYMBOL_VALUE (&psymbol) = val; | |
2383 | } | |
2384 | else | |
2385 | { | |
2386 | SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr; | |
2387 | } | |
2388 | SYMBOL_SECTION (&psymbol) = 0; | |
2389 | SYMBOL_LANGUAGE (&psymbol) = language; | |
2390 | PSYMBOL_NAMESPACE (&psymbol) = namespace; | |
2391 | PSYMBOL_CLASS (&psymbol) = class; | |
2392 | SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language); | |
2393 | ||
2394 | /* Stash the partial symbol away in the cache */ | |
2395 | psym = bcache (&psymbol, sizeof (struct partial_symbol), &objfile->psymbol_cache); | |
2396 | ||
2397 | /* Save pointer to partial symbol in psymtab, growing symtab if needed. */ | |
2398 | if (list->next >= list->list + list->size) | |
2399 | { | |
2400 | extend_psymbol_list (list, objfile); | |
2401 | } | |
2402 | *list->next++ = psym; | |
2403 | OBJSTAT (objfile, n_psyms++); | |
2404 | } | |
2405 | ||
2406 | /* Add a symbol with a long value to a psymtab. This differs from | |
2407 | * add_psymbol_to_list above in taking both a mangled and a demangled | |
2408 | * name. */ | |
2409 | ||
2410 | void | |
2411 | add_psymbol_with_dem_name_to_list (name, namelength, dem_name, dem_namelength, | |
c5aa993b | 2412 | namespace, class, list, val, coreaddr, language, objfile) |
c906108c SS |
2413 | char *name; |
2414 | int namelength; | |
2415 | char *dem_name; | |
2416 | int dem_namelength; | |
2417 | namespace_enum namespace; | |
2418 | enum address_class class; | |
2419 | struct psymbol_allocation_list *list; | |
c5aa993b JM |
2420 | long val; /* Value as a long */ |
2421 | CORE_ADDR coreaddr; /* Value as a CORE_ADDR */ | |
c906108c SS |
2422 | enum language language; |
2423 | struct objfile *objfile; | |
2424 | { | |
2425 | register struct partial_symbol *psym; | |
2426 | char *buf = alloca (namelength + 1); | |
2427 | /* psymbol is static so that there will be no uninitialized gaps in the | |
2428 | structure which might contain random data, causing cache misses in | |
2429 | bcache. */ | |
2430 | static struct partial_symbol psymbol; | |
2431 | ||
2432 | /* Create local copy of the partial symbol */ | |
2433 | ||
2434 | memcpy (buf, name, namelength); | |
2435 | buf[namelength] = '\0'; | |
2436 | SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, &objfile->psymbol_cache); | |
2437 | ||
2438 | buf = alloca (dem_namelength + 1); | |
2439 | memcpy (buf, dem_name, dem_namelength); | |
2440 | buf[dem_namelength] = '\0'; | |
c5aa993b | 2441 | |
c906108c SS |
2442 | switch (language) |
2443 | { | |
c5aa993b JM |
2444 | case language_c: |
2445 | case language_cplus: | |
2446 | SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol) = | |
2447 | bcache (buf, dem_namelength + 1, &objfile->psymbol_cache); | |
2448 | break; | |
2449 | case language_chill: | |
2450 | SYMBOL_CHILL_DEMANGLED_NAME (&psymbol) = | |
2451 | bcache (buf, dem_namelength + 1, &objfile->psymbol_cache); | |
2452 | ||
c906108c SS |
2453 | /* FIXME What should be done for the default case? Ignoring for now. */ |
2454 | } | |
2455 | ||
2456 | /* val and coreaddr are mutually exclusive, one of them *will* be zero */ | |
2457 | if (val != 0) | |
2458 | { | |
2459 | SYMBOL_VALUE (&psymbol) = val; | |
2460 | } | |
2461 | else | |
2462 | { | |
2463 | SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr; | |
2464 | } | |
2465 | SYMBOL_SECTION (&psymbol) = 0; | |
2466 | SYMBOL_LANGUAGE (&psymbol) = language; | |
2467 | PSYMBOL_NAMESPACE (&psymbol) = namespace; | |
2468 | PSYMBOL_CLASS (&psymbol) = class; | |
2469 | SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language); | |
2470 | ||
2471 | /* Stash the partial symbol away in the cache */ | |
2472 | psym = bcache (&psymbol, sizeof (struct partial_symbol), &objfile->psymbol_cache); | |
2473 | ||
2474 | /* Save pointer to partial symbol in psymtab, growing symtab if needed. */ | |
2475 | if (list->next >= list->list + list->size) | |
2476 | { | |
2477 | extend_psymbol_list (list, objfile); | |
2478 | } | |
2479 | *list->next++ = psym; | |
2480 | OBJSTAT (objfile, n_psyms++); | |
2481 | } | |
2482 | ||
2483 | /* Initialize storage for partial symbols. */ | |
2484 | ||
2485 | void | |
2486 | init_psymbol_list (objfile, total_symbols) | |
2487 | struct objfile *objfile; | |
2488 | int total_symbols; | |
2489 | { | |
2490 | /* Free any previously allocated psymbol lists. */ | |
c5aa993b JM |
2491 | |
2492 | if (objfile->global_psymbols.list) | |
c906108c | 2493 | { |
c5aa993b | 2494 | mfree (objfile->md, (PTR) objfile->global_psymbols.list); |
c906108c | 2495 | } |
c5aa993b | 2496 | if (objfile->static_psymbols.list) |
c906108c | 2497 | { |
c5aa993b | 2498 | mfree (objfile->md, (PTR) objfile->static_psymbols.list); |
c906108c | 2499 | } |
c5aa993b | 2500 | |
c906108c SS |
2501 | /* Current best guess is that approximately a twentieth |
2502 | of the total symbols (in a debugging file) are global or static | |
2503 | oriented symbols */ | |
c906108c | 2504 | |
c5aa993b JM |
2505 | objfile->global_psymbols.size = total_symbols / 10; |
2506 | objfile->static_psymbols.size = total_symbols / 10; | |
2507 | ||
2508 | if (objfile->global_psymbols.size > 0) | |
c906108c | 2509 | { |
c5aa993b JM |
2510 | objfile->global_psymbols.next = |
2511 | objfile->global_psymbols.list = (struct partial_symbol **) | |
2512 | xmmalloc (objfile->md, (objfile->global_psymbols.size | |
2513 | * sizeof (struct partial_symbol *))); | |
c906108c | 2514 | } |
c5aa993b | 2515 | if (objfile->static_psymbols.size > 0) |
c906108c | 2516 | { |
c5aa993b JM |
2517 | objfile->static_psymbols.next = |
2518 | objfile->static_psymbols.list = (struct partial_symbol **) | |
2519 | xmmalloc (objfile->md, (objfile->static_psymbols.size | |
2520 | * sizeof (struct partial_symbol *))); | |
c906108c SS |
2521 | } |
2522 | } | |
2523 | ||
2524 | /* OVERLAYS: | |
2525 | The following code implements an abstraction for debugging overlay sections. | |
2526 | ||
2527 | The target model is as follows: | |
2528 | 1) The gnu linker will permit multiple sections to be mapped into the | |
c5aa993b | 2529 | same VMA, each with its own unique LMA (or load address). |
c906108c | 2530 | 2) It is assumed that some runtime mechanism exists for mapping the |
c5aa993b | 2531 | sections, one by one, from the load address into the VMA address. |
c906108c | 2532 | 3) This code provides a mechanism for gdb to keep track of which |
c5aa993b JM |
2533 | sections should be considered to be mapped from the VMA to the LMA. |
2534 | This information is used for symbol lookup, and memory read/write. | |
2535 | For instance, if a section has been mapped then its contents | |
2536 | should be read from the VMA, otherwise from the LMA. | |
c906108c SS |
2537 | |
2538 | Two levels of debugger support for overlays are available. One is | |
2539 | "manual", in which the debugger relies on the user to tell it which | |
2540 | overlays are currently mapped. This level of support is | |
2541 | implemented entirely in the core debugger, and the information about | |
2542 | whether a section is mapped is kept in the objfile->obj_section table. | |
2543 | ||
2544 | The second level of support is "automatic", and is only available if | |
2545 | the target-specific code provides functionality to read the target's | |
2546 | overlay mapping table, and translate its contents for the debugger | |
2547 | (by updating the mapped state information in the obj_section tables). | |
2548 | ||
2549 | The interface is as follows: | |
c5aa993b JM |
2550 | User commands: |
2551 | overlay map <name> -- tell gdb to consider this section mapped | |
2552 | overlay unmap <name> -- tell gdb to consider this section unmapped | |
2553 | overlay list -- list the sections that GDB thinks are mapped | |
2554 | overlay read-target -- get the target's state of what's mapped | |
2555 | overlay off/manual/auto -- set overlay debugging state | |
2556 | Functional interface: | |
2557 | find_pc_mapped_section(pc): if the pc is in the range of a mapped | |
2558 | section, return that section. | |
2559 | find_pc_overlay(pc): find any overlay section that contains | |
2560 | the pc, either in its VMA or its LMA | |
2561 | overlay_is_mapped(sect): true if overlay is marked as mapped | |
2562 | section_is_overlay(sect): true if section's VMA != LMA | |
2563 | pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA | |
2564 | pc_in_unmapped_range(...): true if pc belongs to section's LMA | |
2565 | overlay_mapped_address(...): map an address from section's LMA to VMA | |
2566 | overlay_unmapped_address(...): map an address from section's VMA to LMA | |
2567 | symbol_overlayed_address(...): Return a "current" address for symbol: | |
2568 | either in VMA or LMA depending on whether | |
2569 | the symbol's section is currently mapped | |
c906108c SS |
2570 | */ |
2571 | ||
2572 | /* Overlay debugging state: */ | |
2573 | ||
2574 | int overlay_debugging = 0; /* 0 == off, 1 == manual, -1 == auto */ | |
2575 | int overlay_cache_invalid = 0; /* True if need to refresh mapped state */ | |
2576 | ||
2577 | /* Target vector for refreshing overlay mapped state */ | |
2578 | static void simple_overlay_update PARAMS ((struct obj_section *)); | |
c5aa993b JM |
2579 | void (*target_overlay_update) PARAMS ((struct obj_section *)) |
2580 | = simple_overlay_update; | |
c906108c SS |
2581 | |
2582 | /* Function: section_is_overlay (SECTION) | |
2583 | Returns true if SECTION has VMA not equal to LMA, ie. | |
2584 | SECTION is loaded at an address different from where it will "run". */ | |
2585 | ||
2586 | int | |
2587 | section_is_overlay (section) | |
2588 | asection *section; | |
2589 | { | |
2590 | if (overlay_debugging) | |
2591 | if (section && section->lma != 0 && | |
2592 | section->vma != section->lma) | |
2593 | return 1; | |
2594 | ||
2595 | return 0; | |
2596 | } | |
2597 | ||
2598 | /* Function: overlay_invalidate_all (void) | |
2599 | Invalidate the mapped state of all overlay sections (mark it as stale). */ | |
2600 | ||
2601 | static void | |
2602 | overlay_invalidate_all () | |
2603 | { | |
c5aa993b | 2604 | struct objfile *objfile; |
c906108c SS |
2605 | struct obj_section *sect; |
2606 | ||
2607 | ALL_OBJSECTIONS (objfile, sect) | |
2608 | if (section_is_overlay (sect->the_bfd_section)) | |
c5aa993b | 2609 | sect->ovly_mapped = -1; |
c906108c SS |
2610 | } |
2611 | ||
2612 | /* Function: overlay_is_mapped (SECTION) | |
2613 | Returns true if section is an overlay, and is currently mapped. | |
2614 | Private: public access is thru function section_is_mapped. | |
2615 | ||
2616 | Access to the ovly_mapped flag is restricted to this function, so | |
2617 | that we can do automatic update. If the global flag | |
2618 | OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call | |
2619 | overlay_invalidate_all. If the mapped state of the particular | |
2620 | section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */ | |
2621 | ||
c5aa993b | 2622 | static int |
c906108c SS |
2623 | overlay_is_mapped (osect) |
2624 | struct obj_section *osect; | |
2625 | { | |
2626 | if (osect == 0 || !section_is_overlay (osect->the_bfd_section)) | |
2627 | return 0; | |
2628 | ||
c5aa993b | 2629 | switch (overlay_debugging) |
c906108c SS |
2630 | { |
2631 | default: | |
c5aa993b JM |
2632 | case 0: |
2633 | return 0; /* overlay debugging off */ | |
c906108c SS |
2634 | case -1: /* overlay debugging automatic */ |
2635 | /* Unles there is a target_overlay_update function, | |
c5aa993b | 2636 | there's really nothing useful to do here (can't really go auto) */ |
c906108c SS |
2637 | if (target_overlay_update) |
2638 | { | |
2639 | if (overlay_cache_invalid) | |
2640 | { | |
2641 | overlay_invalidate_all (); | |
2642 | overlay_cache_invalid = 0; | |
2643 | } | |
2644 | if (osect->ovly_mapped == -1) | |
2645 | (*target_overlay_update) (osect); | |
2646 | } | |
2647 | /* fall thru to manual case */ | |
2648 | case 1: /* overlay debugging manual */ | |
2649 | return osect->ovly_mapped == 1; | |
2650 | } | |
2651 | } | |
2652 | ||
2653 | /* Function: section_is_mapped | |
2654 | Returns true if section is an overlay, and is currently mapped. */ | |
2655 | ||
2656 | int | |
2657 | section_is_mapped (section) | |
2658 | asection *section; | |
2659 | { | |
c5aa993b | 2660 | struct objfile *objfile; |
c906108c SS |
2661 | struct obj_section *osect; |
2662 | ||
2663 | if (overlay_debugging) | |
2664 | if (section && section_is_overlay (section)) | |
2665 | ALL_OBJSECTIONS (objfile, osect) | |
2666 | if (osect->the_bfd_section == section) | |
c5aa993b | 2667 | return overlay_is_mapped (osect); |
c906108c SS |
2668 | |
2669 | return 0; | |
2670 | } | |
2671 | ||
2672 | /* Function: pc_in_unmapped_range | |
2673 | If PC falls into the lma range of SECTION, return true, else false. */ | |
2674 | ||
2675 | CORE_ADDR | |
2676 | pc_in_unmapped_range (pc, section) | |
2677 | CORE_ADDR pc; | |
2678 | asection *section; | |
2679 | { | |
2680 | int size; | |
2681 | ||
2682 | if (overlay_debugging) | |
2683 | if (section && section_is_overlay (section)) | |
2684 | { | |
2685 | size = bfd_get_section_size_before_reloc (section); | |
2686 | if (section->lma <= pc && pc < section->lma + size) | |
2687 | return 1; | |
2688 | } | |
2689 | return 0; | |
2690 | } | |
2691 | ||
2692 | /* Function: pc_in_mapped_range | |
2693 | If PC falls into the vma range of SECTION, return true, else false. */ | |
2694 | ||
2695 | CORE_ADDR | |
2696 | pc_in_mapped_range (pc, section) | |
2697 | CORE_ADDR pc; | |
2698 | asection *section; | |
2699 | { | |
2700 | int size; | |
2701 | ||
2702 | if (overlay_debugging) | |
2703 | if (section && section_is_overlay (section)) | |
2704 | { | |
2705 | size = bfd_get_section_size_before_reloc (section); | |
2706 | if (section->vma <= pc && pc < section->vma + size) | |
2707 | return 1; | |
2708 | } | |
2709 | return 0; | |
2710 | } | |
2711 | ||
2712 | /* Function: overlay_unmapped_address (PC, SECTION) | |
2713 | Returns the address corresponding to PC in the unmapped (load) range. | |
2714 | May be the same as PC. */ | |
2715 | ||
2716 | CORE_ADDR | |
2717 | overlay_unmapped_address (pc, section) | |
2718 | CORE_ADDR pc; | |
2719 | asection *section; | |
2720 | { | |
2721 | if (overlay_debugging) | |
2722 | if (section && section_is_overlay (section) && | |
2723 | pc_in_mapped_range (pc, section)) | |
2724 | return pc + section->lma - section->vma; | |
2725 | ||
2726 | return pc; | |
2727 | } | |
2728 | ||
2729 | /* Function: overlay_mapped_address (PC, SECTION) | |
2730 | Returns the address corresponding to PC in the mapped (runtime) range. | |
2731 | May be the same as PC. */ | |
2732 | ||
2733 | CORE_ADDR | |
2734 | overlay_mapped_address (pc, section) | |
2735 | CORE_ADDR pc; | |
2736 | asection *section; | |
2737 | { | |
2738 | if (overlay_debugging) | |
2739 | if (section && section_is_overlay (section) && | |
2740 | pc_in_unmapped_range (pc, section)) | |
2741 | return pc + section->vma - section->lma; | |
2742 | ||
2743 | return pc; | |
2744 | } | |
2745 | ||
2746 | ||
2747 | /* Function: symbol_overlayed_address | |
2748 | Return one of two addresses (relative to the VMA or to the LMA), | |
2749 | depending on whether the section is mapped or not. */ | |
2750 | ||
c5aa993b | 2751 | CORE_ADDR |
c906108c SS |
2752 | symbol_overlayed_address (address, section) |
2753 | CORE_ADDR address; | |
2754 | asection *section; | |
2755 | { | |
2756 | if (overlay_debugging) | |
2757 | { | |
2758 | /* If the symbol has no section, just return its regular address. */ | |
2759 | if (section == 0) | |
2760 | return address; | |
2761 | /* If the symbol's section is not an overlay, just return its address */ | |
2762 | if (!section_is_overlay (section)) | |
2763 | return address; | |
2764 | /* If the symbol's section is mapped, just return its address */ | |
2765 | if (section_is_mapped (section)) | |
2766 | return address; | |
2767 | /* | |
2768 | * HOWEVER: if the symbol is in an overlay section which is NOT mapped, | |
2769 | * then return its LOADED address rather than its vma address!! | |
2770 | */ | |
2771 | return overlay_unmapped_address (address, section); | |
2772 | } | |
2773 | return address; | |
2774 | } | |
2775 | ||
2776 | /* Function: find_pc_overlay (PC) | |
2777 | Return the best-match overlay section for PC: | |
2778 | If PC matches a mapped overlay section's VMA, return that section. | |
2779 | Else if PC matches an unmapped section's VMA, return that section. | |
2780 | Else if PC matches an unmapped section's LMA, return that section. */ | |
2781 | ||
2782 | asection * | |
2783 | find_pc_overlay (pc) | |
2784 | CORE_ADDR pc; | |
2785 | { | |
c5aa993b | 2786 | struct objfile *objfile; |
c906108c SS |
2787 | struct obj_section *osect, *best_match = NULL; |
2788 | ||
2789 | if (overlay_debugging) | |
2790 | ALL_OBJSECTIONS (objfile, osect) | |
2791 | if (section_is_overlay (osect->the_bfd_section)) | |
c5aa993b JM |
2792 | { |
2793 | if (pc_in_mapped_range (pc, osect->the_bfd_section)) | |
2794 | { | |
2795 | if (overlay_is_mapped (osect)) | |
2796 | return osect->the_bfd_section; | |
2797 | else | |
2798 | best_match = osect; | |
2799 | } | |
2800 | else if (pc_in_unmapped_range (pc, osect->the_bfd_section)) | |
2801 | best_match = osect; | |
2802 | } | |
c906108c SS |
2803 | return best_match ? best_match->the_bfd_section : NULL; |
2804 | } | |
2805 | ||
2806 | /* Function: find_pc_mapped_section (PC) | |
2807 | If PC falls into the VMA address range of an overlay section that is | |
2808 | currently marked as MAPPED, return that section. Else return NULL. */ | |
2809 | ||
2810 | asection * | |
2811 | find_pc_mapped_section (pc) | |
2812 | CORE_ADDR pc; | |
2813 | { | |
c5aa993b | 2814 | struct objfile *objfile; |
c906108c SS |
2815 | struct obj_section *osect; |
2816 | ||
2817 | if (overlay_debugging) | |
2818 | ALL_OBJSECTIONS (objfile, osect) | |
2819 | if (pc_in_mapped_range (pc, osect->the_bfd_section) && | |
2820 | overlay_is_mapped (osect)) | |
c5aa993b | 2821 | return osect->the_bfd_section; |
c906108c SS |
2822 | |
2823 | return NULL; | |
2824 | } | |
2825 | ||
2826 | /* Function: list_overlays_command | |
2827 | Print a list of mapped sections and their PC ranges */ | |
2828 | ||
2829 | void | |
2830 | list_overlays_command (args, from_tty) | |
2831 | char *args; | |
2832 | int from_tty; | |
2833 | { | |
c5aa993b JM |
2834 | int nmapped = 0; |
2835 | struct objfile *objfile; | |
c906108c SS |
2836 | struct obj_section *osect; |
2837 | ||
2838 | if (overlay_debugging) | |
2839 | ALL_OBJSECTIONS (objfile, osect) | |
2840 | if (overlay_is_mapped (osect)) | |
c5aa993b JM |
2841 | { |
2842 | const char *name; | |
2843 | bfd_vma lma, vma; | |
2844 | int size; | |
2845 | ||
2846 | vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section); | |
2847 | lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section); | |
2848 | size = bfd_get_section_size_before_reloc (osect->the_bfd_section); | |
2849 | name = bfd_section_name (objfile->obfd, osect->the_bfd_section); | |
2850 | ||
2851 | printf_filtered ("Section %s, loaded at ", name); | |
2852 | print_address_numeric (lma, 1, gdb_stdout); | |
2853 | puts_filtered (" - "); | |
2854 | print_address_numeric (lma + size, 1, gdb_stdout); | |
2855 | printf_filtered (", mapped at "); | |
2856 | print_address_numeric (vma, 1, gdb_stdout); | |
2857 | puts_filtered (" - "); | |
2858 | print_address_numeric (vma + size, 1, gdb_stdout); | |
2859 | puts_filtered ("\n"); | |
2860 | ||
2861 | nmapped++; | |
2862 | } | |
c906108c SS |
2863 | if (nmapped == 0) |
2864 | printf_filtered ("No sections are mapped.\n"); | |
2865 | } | |
2866 | ||
2867 | /* Function: map_overlay_command | |
2868 | Mark the named section as mapped (ie. residing at its VMA address). */ | |
2869 | ||
2870 | void | |
2871 | map_overlay_command (args, from_tty) | |
2872 | char *args; | |
c5aa993b | 2873 | int from_tty; |
c906108c | 2874 | { |
c5aa993b JM |
2875 | struct objfile *objfile, *objfile2; |
2876 | struct obj_section *sec, *sec2; | |
2877 | asection *bfdsec; | |
c906108c SS |
2878 | |
2879 | if (!overlay_debugging) | |
2880 | error ("Overlay debugging not enabled. Use the 'OVERLAY ON' command."); | |
2881 | ||
2882 | if (args == 0 || *args == 0) | |
2883 | error ("Argument required: name of an overlay section"); | |
2884 | ||
2885 | /* First, find a section matching the user supplied argument */ | |
2886 | ALL_OBJSECTIONS (objfile, sec) | |
2887 | if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args)) | |
c5aa993b JM |
2888 | { |
2889 | /* Now, check to see if the section is an overlay. */ | |
2890 | bfdsec = sec->the_bfd_section; | |
2891 | if (!section_is_overlay (bfdsec)) | |
2892 | continue; /* not an overlay section */ | |
2893 | ||
2894 | /* Mark the overlay as "mapped" */ | |
2895 | sec->ovly_mapped = 1; | |
2896 | ||
2897 | /* Next, make a pass and unmap any sections that are | |
2898 | overlapped by this new section: */ | |
2899 | ALL_OBJSECTIONS (objfile2, sec2) | |
2900 | if (sec2->ovly_mapped && | |
2901 | sec != sec2 && | |
2902 | sec->the_bfd_section != sec2->the_bfd_section && | |
2903 | (pc_in_mapped_range (sec2->addr, sec->the_bfd_section) || | |
2904 | pc_in_mapped_range (sec2->endaddr, sec->the_bfd_section))) | |
2905 | { | |
2906 | if (info_verbose) | |
2907 | printf_filtered ("Note: section %s unmapped by overlap\n", | |
2908 | bfd_section_name (objfile->obfd, | |
2909 | sec2->the_bfd_section)); | |
2910 | sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2 */ | |
2911 | } | |
2912 | return; | |
2913 | } | |
c906108c SS |
2914 | error ("No overlay section called %s", args); |
2915 | } | |
2916 | ||
2917 | /* Function: unmap_overlay_command | |
2918 | Mark the overlay section as unmapped | |
2919 | (ie. resident in its LMA address range, rather than the VMA range). */ | |
2920 | ||
2921 | void | |
2922 | unmap_overlay_command (args, from_tty) | |
2923 | char *args; | |
c5aa993b | 2924 | int from_tty; |
c906108c | 2925 | { |
c5aa993b | 2926 | struct objfile *objfile; |
c906108c SS |
2927 | struct obj_section *sec; |
2928 | ||
2929 | if (!overlay_debugging) | |
2930 | error ("Overlay debugging not enabled. Use the 'OVERLAY ON' command."); | |
2931 | ||
2932 | if (args == 0 || *args == 0) | |
2933 | error ("Argument required: name of an overlay section"); | |
2934 | ||
2935 | /* First, find a section matching the user supplied argument */ | |
2936 | ALL_OBJSECTIONS (objfile, sec) | |
2937 | if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args)) | |
c5aa993b JM |
2938 | { |
2939 | if (!sec->ovly_mapped) | |
2940 | error ("Section %s is not mapped", args); | |
2941 | sec->ovly_mapped = 0; | |
2942 | return; | |
2943 | } | |
c906108c SS |
2944 | error ("No overlay section called %s", args); |
2945 | } | |
2946 | ||
2947 | /* Function: overlay_auto_command | |
2948 | A utility command to turn on overlay debugging. | |
2949 | Possibly this should be done via a set/show command. */ | |
2950 | ||
2951 | static void | |
2952 | overlay_auto_command (args, from_tty) | |
2953 | char *args; | |
c5aa993b | 2954 | int from_tty; |
c906108c SS |
2955 | { |
2956 | overlay_debugging = -1; | |
2957 | if (info_verbose) | |
2958 | printf_filtered ("Automatic overlay debugging enabled."); | |
2959 | } | |
2960 | ||
2961 | /* Function: overlay_manual_command | |
2962 | A utility command to turn on overlay debugging. | |
2963 | Possibly this should be done via a set/show command. */ | |
2964 | ||
2965 | static void | |
2966 | overlay_manual_command (args, from_tty) | |
2967 | char *args; | |
c5aa993b | 2968 | int from_tty; |
c906108c SS |
2969 | { |
2970 | overlay_debugging = 1; | |
2971 | if (info_verbose) | |
2972 | printf_filtered ("Overlay debugging enabled."); | |
2973 | } | |
2974 | ||
2975 | /* Function: overlay_off_command | |
2976 | A utility command to turn on overlay debugging. | |
2977 | Possibly this should be done via a set/show command. */ | |
2978 | ||
2979 | static void | |
2980 | overlay_off_command (args, from_tty) | |
2981 | char *args; | |
c5aa993b | 2982 | int from_tty; |
c906108c | 2983 | { |
c5aa993b | 2984 | overlay_debugging = 0; |
c906108c SS |
2985 | if (info_verbose) |
2986 | printf_filtered ("Overlay debugging disabled."); | |
2987 | } | |
2988 | ||
2989 | static void | |
2990 | overlay_load_command (args, from_tty) | |
2991 | char *args; | |
c5aa993b | 2992 | int from_tty; |
c906108c SS |
2993 | { |
2994 | if (target_overlay_update) | |
2995 | (*target_overlay_update) (NULL); | |
2996 | else | |
2997 | error ("This target does not know how to read its overlay state."); | |
2998 | } | |
2999 | ||
3000 | /* Function: overlay_command | |
3001 | A place-holder for a mis-typed command */ | |
3002 | ||
3003 | /* Command list chain containing all defined "overlay" subcommands. */ | |
3004 | struct cmd_list_element *overlaylist; | |
3005 | ||
3006 | static void | |
3007 | overlay_command (args, from_tty) | |
3008 | char *args; | |
3009 | int from_tty; | |
3010 | { | |
c5aa993b | 3011 | printf_unfiltered |
c906108c SS |
3012 | ("\"overlay\" must be followed by the name of an overlay command.\n"); |
3013 | help_list (overlaylist, "overlay ", -1, gdb_stdout); | |
3014 | } | |
3015 | ||
3016 | ||
3017 | /* Target Overlays for the "Simplest" overlay manager: | |
3018 | ||
3019 | This is GDB's default target overlay layer. It works with the | |
3020 | minimal overlay manager supplied as an example by Cygnus. The | |
3021 | entry point is via a function pointer "target_overlay_update", | |
3022 | so targets that use a different runtime overlay manager can | |
3023 | substitute their own overlay_update function and take over the | |
3024 | function pointer. | |
3025 | ||
3026 | The overlay_update function pokes around in the target's data structures | |
3027 | to see what overlays are mapped, and updates GDB's overlay mapping with | |
3028 | this information. | |
3029 | ||
3030 | In this simple implementation, the target data structures are as follows: | |
c5aa993b JM |
3031 | unsigned _novlys; /# number of overlay sections #/ |
3032 | unsigned _ovly_table[_novlys][4] = { | |
3033 | {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/ | |
3034 | {..., ..., ..., ...}, | |
3035 | } | |
3036 | unsigned _novly_regions; /# number of overlay regions #/ | |
3037 | unsigned _ovly_region_table[_novly_regions][3] = { | |
3038 | {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/ | |
3039 | {..., ..., ...}, | |
3040 | } | |
c906108c SS |
3041 | These functions will attempt to update GDB's mappedness state in the |
3042 | symbol section table, based on the target's mappedness state. | |
3043 | ||
3044 | To do this, we keep a cached copy of the target's _ovly_table, and | |
3045 | attempt to detect when the cached copy is invalidated. The main | |
3046 | entry point is "simple_overlay_update(SECT), which looks up SECT in | |
3047 | the cached table and re-reads only the entry for that section from | |
3048 | the target (whenever possible). | |
3049 | */ | |
3050 | ||
3051 | /* Cached, dynamically allocated copies of the target data structures: */ | |
c5aa993b | 3052 | static unsigned (*cache_ovly_table)[4] = 0; |
c906108c | 3053 | #if 0 |
c5aa993b | 3054 | static unsigned (*cache_ovly_region_table)[3] = 0; |
c906108c | 3055 | #endif |
c5aa993b | 3056 | static unsigned cache_novlys = 0; |
c906108c | 3057 | #if 0 |
c5aa993b | 3058 | static unsigned cache_novly_regions = 0; |
c906108c SS |
3059 | #endif |
3060 | static CORE_ADDR cache_ovly_table_base = 0; | |
3061 | #if 0 | |
3062 | static CORE_ADDR cache_ovly_region_table_base = 0; | |
3063 | #endif | |
c5aa993b JM |
3064 | enum ovly_index |
3065 | { | |
3066 | VMA, SIZE, LMA, MAPPED | |
3067 | }; | |
c906108c SS |
3068 | #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT) |
3069 | ||
3070 | /* Throw away the cached copy of _ovly_table */ | |
3071 | static void | |
3072 | simple_free_overlay_table () | |
3073 | { | |
3074 | if (cache_ovly_table) | |
c5aa993b JM |
3075 | free (cache_ovly_table); |
3076 | cache_novlys = 0; | |
c906108c SS |
3077 | cache_ovly_table = NULL; |
3078 | cache_ovly_table_base = 0; | |
3079 | } | |
3080 | ||
3081 | #if 0 | |
3082 | /* Throw away the cached copy of _ovly_region_table */ | |
3083 | static void | |
3084 | simple_free_overlay_region_table () | |
3085 | { | |
3086 | if (cache_ovly_region_table) | |
c5aa993b JM |
3087 | free (cache_ovly_region_table); |
3088 | cache_novly_regions = 0; | |
c906108c SS |
3089 | cache_ovly_region_table = NULL; |
3090 | cache_ovly_region_table_base = 0; | |
3091 | } | |
3092 | #endif | |
3093 | ||
3094 | /* Read an array of ints from the target into a local buffer. | |
3095 | Convert to host order. int LEN is number of ints */ | |
3096 | static void | |
3097 | read_target_long_array (memaddr, myaddr, len) | |
c5aa993b | 3098 | CORE_ADDR memaddr; |
c906108c | 3099 | unsigned int *myaddr; |
c5aa993b | 3100 | int len; |
c906108c SS |
3101 | { |
3102 | char *buf = alloca (len * TARGET_LONG_BYTES); | |
c5aa993b | 3103 | int i; |
c906108c SS |
3104 | |
3105 | read_memory (memaddr, buf, len * TARGET_LONG_BYTES); | |
3106 | for (i = 0; i < len; i++) | |
c5aa993b | 3107 | myaddr[i] = extract_unsigned_integer (TARGET_LONG_BYTES * i + buf, |
c906108c SS |
3108 | TARGET_LONG_BYTES); |
3109 | } | |
3110 | ||
3111 | /* Find and grab a copy of the target _ovly_table | |
3112 | (and _novlys, which is needed for the table's size) */ | |
c5aa993b | 3113 | static int |
c906108c SS |
3114 | simple_read_overlay_table () |
3115 | { | |
3116 | struct minimal_symbol *msym; | |
3117 | ||
3118 | simple_free_overlay_table (); | |
3119 | msym = lookup_minimal_symbol ("_novlys", 0, 0); | |
3120 | if (msym != NULL) | |
3121 | cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4); | |
c5aa993b JM |
3122 | else |
3123 | return 0; /* failure */ | |
3124 | cache_ovly_table = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table)); | |
c906108c SS |
3125 | if (cache_ovly_table != NULL) |
3126 | { | |
3127 | msym = lookup_minimal_symbol ("_ovly_table", 0, 0); | |
3128 | if (msym != NULL) | |
3129 | { | |
3130 | cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (msym); | |
c5aa993b JM |
3131 | read_target_long_array (cache_ovly_table_base, |
3132 | (int *) cache_ovly_table, | |
c906108c SS |
3133 | cache_novlys * 4); |
3134 | } | |
c5aa993b JM |
3135 | else |
3136 | return 0; /* failure */ | |
c906108c | 3137 | } |
c5aa993b JM |
3138 | else |
3139 | return 0; /* failure */ | |
3140 | return 1; /* SUCCESS */ | |
c906108c SS |
3141 | } |
3142 | ||
3143 | #if 0 | |
3144 | /* Find and grab a copy of the target _ovly_region_table | |
3145 | (and _novly_regions, which is needed for the table's size) */ | |
c5aa993b | 3146 | static int |
c906108c SS |
3147 | simple_read_overlay_region_table () |
3148 | { | |
3149 | struct minimal_symbol *msym; | |
3150 | ||
3151 | simple_free_overlay_region_table (); | |
3152 | msym = lookup_minimal_symbol ("_novly_regions", 0, 0); | |
3153 | if (msym != NULL) | |
3154 | cache_novly_regions = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4); | |
c5aa993b JM |
3155 | else |
3156 | return 0; /* failure */ | |
c906108c SS |
3157 | cache_ovly_region_table = (void *) xmalloc (cache_novly_regions * 12); |
3158 | if (cache_ovly_region_table != NULL) | |
3159 | { | |
3160 | msym = lookup_minimal_symbol ("_ovly_region_table", 0, 0); | |
3161 | if (msym != NULL) | |
3162 | { | |
3163 | cache_ovly_region_table_base = SYMBOL_VALUE_ADDRESS (msym); | |
c5aa993b JM |
3164 | read_target_long_array (cache_ovly_region_table_base, |
3165 | (int *) cache_ovly_region_table, | |
c906108c SS |
3166 | cache_novly_regions * 3); |
3167 | } | |
c5aa993b JM |
3168 | else |
3169 | return 0; /* failure */ | |
c906108c | 3170 | } |
c5aa993b JM |
3171 | else |
3172 | return 0; /* failure */ | |
3173 | return 1; /* SUCCESS */ | |
c906108c SS |
3174 | } |
3175 | #endif | |
3176 | ||
3177 | /* Function: simple_overlay_update_1 | |
3178 | A helper function for simple_overlay_update. Assuming a cached copy | |
3179 | of _ovly_table exists, look through it to find an entry whose vma, | |
3180 | lma and size match those of OSECT. Re-read the entry and make sure | |
3181 | it still matches OSECT (else the table may no longer be valid). | |
3182 | Set OSECT's mapped state to match the entry. Return: 1 for | |
3183 | success, 0 for failure. */ | |
3184 | ||
3185 | static int | |
3186 | simple_overlay_update_1 (osect) | |
3187 | struct obj_section *osect; | |
3188 | { | |
3189 | int i, size; | |
3190 | ||
3191 | size = bfd_get_section_size_before_reloc (osect->the_bfd_section); | |
3192 | for (i = 0; i < cache_novlys; i++) | |
c5aa993b JM |
3193 | if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma && |
3194 | cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* && | |
3195 | cache_ovly_table[i][SIZE] == size */ ) | |
c906108c SS |
3196 | { |
3197 | read_target_long_array (cache_ovly_table_base + i * TARGET_LONG_BYTES, | |
3198 | (int *) cache_ovly_table[i], 4); | |
c5aa993b JM |
3199 | if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma && |
3200 | cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* && | |
3201 | cache_ovly_table[i][SIZE] == size */ ) | |
c906108c SS |
3202 | { |
3203 | osect->ovly_mapped = cache_ovly_table[i][MAPPED]; | |
3204 | return 1; | |
3205 | } | |
c5aa993b | 3206 | else /* Warning! Warning! Target's ovly table has changed! */ |
c906108c SS |
3207 | return 0; |
3208 | } | |
3209 | return 0; | |
3210 | } | |
3211 | ||
3212 | /* Function: simple_overlay_update | |
3213 | If OSECT is NULL, then update all sections' mapped state | |
3214 | (after re-reading the entire target _ovly_table). | |
3215 | If OSECT is non-NULL, then try to find a matching entry in the | |
3216 | cached ovly_table and update only OSECT's mapped state. | |
3217 | If a cached entry can't be found or the cache isn't valid, then | |
3218 | re-read the entire cache, and go ahead and update all sections. */ | |
3219 | ||
3220 | static void | |
3221 | simple_overlay_update (osect) | |
3222 | struct obj_section *osect; | |
3223 | { | |
c5aa993b | 3224 | struct objfile *objfile; |
c906108c SS |
3225 | |
3226 | /* Were we given an osect to look up? NULL means do all of them. */ | |
3227 | if (osect) | |
3228 | /* Have we got a cached copy of the target's overlay table? */ | |
3229 | if (cache_ovly_table != NULL) | |
3230 | /* Does its cached location match what's currently in the symtab? */ | |
c5aa993b | 3231 | if (cache_ovly_table_base == |
c906108c SS |
3232 | SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", 0, 0))) |
3233 | /* Then go ahead and try to look up this single section in the cache */ | |
3234 | if (simple_overlay_update_1 (osect)) | |
3235 | /* Found it! We're done. */ | |
3236 | return; | |
3237 | ||
3238 | /* Cached table no good: need to read the entire table anew. | |
3239 | Or else we want all the sections, in which case it's actually | |
3240 | more efficient to read the whole table in one block anyway. */ | |
3241 | ||
3242 | if (simple_read_overlay_table () == 0) /* read failed? No table? */ | |
3243 | { | |
3244 | warning ("Failed to read the target overlay mapping table."); | |
3245 | return; | |
3246 | } | |
3247 | /* Now may as well update all sections, even if only one was requested. */ | |
3248 | ALL_OBJSECTIONS (objfile, osect) | |
3249 | if (section_is_overlay (osect->the_bfd_section)) | |
c5aa993b JM |
3250 | { |
3251 | int i, size; | |
3252 | ||
3253 | size = bfd_get_section_size_before_reloc (osect->the_bfd_section); | |
3254 | for (i = 0; i < cache_novlys; i++) | |
3255 | if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma && | |
3256 | cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* && | |
3257 | cache_ovly_table[i][SIZE] == size */ ) | |
3258 | { /* obj_section matches i'th entry in ovly_table */ | |
3259 | osect->ovly_mapped = cache_ovly_table[i][MAPPED]; | |
3260 | break; /* finished with inner for loop: break out */ | |
3261 | } | |
3262 | } | |
c906108c SS |
3263 | } |
3264 | ||
3265 | ||
3266 | void | |
3267 | _initialize_symfile () | |
3268 | { | |
3269 | struct cmd_list_element *c; | |
c5aa993b | 3270 | |
c906108c | 3271 | c = add_cmd ("symbol-file", class_files, symbol_file_command, |
c5aa993b | 3272 | "Load symbol table from executable file FILE.\n\ |
c906108c SS |
3273 | The `file' command can also load symbol tables, as well as setting the file\n\ |
3274 | to execute.", &cmdlist); | |
3275 | c->completer = filename_completer; | |
3276 | ||
3277 | c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command, | |
2acceee2 JM |
3278 | "Usage: add-symbol-file FILE ADDR [DATA_ADDR [BSS_ADDR]]\n\ |
3279 | or: add-symbol-file FILE -T<SECT> <SECT_ADDR> -T<SECT> <SECT_ADDR> ...\n\ | |
c906108c | 3280 | Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\ |
2acceee2 JM |
3281 | ADDR is the starting address of the file's text.\n\ |
3282 | The optional arguments, DATA_ADDR and BSS_ADDR, should be specified\n\ | |
3283 | if the data and bss segments are not contiguous with the text.\n\ | |
3284 | For complicated cases, SECT is a section name to be loaded at SECT_ADDR.", | |
c906108c SS |
3285 | &cmdlist); |
3286 | c->completer = filename_completer; | |
3287 | ||
3288 | c = add_cmd ("add-shared-symbol-files", class_files, | |
3289 | add_shared_symbol_files_command, | |
3290 | "Load the symbols from shared objects in the dynamic linker's link map.", | |
c5aa993b | 3291 | &cmdlist); |
c906108c SS |
3292 | c = add_alias_cmd ("assf", "add-shared-symbol-files", class_files, 1, |
3293 | &cmdlist); | |
3294 | ||
3295 | c = add_cmd ("load", class_files, load_command, | |
c5aa993b | 3296 | "Dynamically load FILE into the running program, and record its symbols\n\ |
c906108c SS |
3297 | for access from GDB.", &cmdlist); |
3298 | c->completer = filename_completer; | |
3299 | ||
3300 | add_show_from_set | |
3301 | (add_set_cmd ("symbol-reloading", class_support, var_boolean, | |
c5aa993b JM |
3302 | (char *) &symbol_reloading, |
3303 | "Set dynamic symbol table reloading multiple times in one run.", | |
c906108c SS |
3304 | &setlist), |
3305 | &showlist); | |
3306 | ||
c5aa993b JM |
3307 | add_prefix_cmd ("overlay", class_support, overlay_command, |
3308 | "Commands for debugging overlays.", &overlaylist, | |
c906108c SS |
3309 | "overlay ", 0, &cmdlist); |
3310 | ||
3311 | add_com_alias ("ovly", "overlay", class_alias, 1); | |
3312 | add_com_alias ("ov", "overlay", class_alias, 1); | |
3313 | ||
c5aa993b | 3314 | add_cmd ("map-overlay", class_support, map_overlay_command, |
c906108c SS |
3315 | "Assert that an overlay section is mapped.", &overlaylist); |
3316 | ||
c5aa993b | 3317 | add_cmd ("unmap-overlay", class_support, unmap_overlay_command, |
c906108c SS |
3318 | "Assert that an overlay section is unmapped.", &overlaylist); |
3319 | ||
c5aa993b | 3320 | add_cmd ("list-overlays", class_support, list_overlays_command, |
c906108c SS |
3321 | "List mappings of overlay sections.", &overlaylist); |
3322 | ||
c5aa993b | 3323 | add_cmd ("manual", class_support, overlay_manual_command, |
c906108c | 3324 | "Enable overlay debugging.", &overlaylist); |
c5aa993b | 3325 | add_cmd ("off", class_support, overlay_off_command, |
c906108c | 3326 | "Disable overlay debugging.", &overlaylist); |
c5aa993b | 3327 | add_cmd ("auto", class_support, overlay_auto_command, |
c906108c | 3328 | "Enable automatic overlay debugging.", &overlaylist); |
c5aa993b | 3329 | add_cmd ("load-target", class_support, overlay_load_command, |
c906108c SS |
3330 | "Read the overlay mapping state from the target.", &overlaylist); |
3331 | ||
3332 | /* Filename extension to source language lookup table: */ | |
3333 | init_filename_language_table (); | |
3334 | c = add_set_cmd ("extension-language", class_files, var_string_noescape, | |
c5aa993b | 3335 | (char *) &ext_args, |
c906108c SS |
3336 | "Set mapping between filename extension and source language.\n\ |
3337 | Usage: set extension-language .foo bar", | |
c5aa993b | 3338 | &setlist); |
c906108c SS |
3339 | c->function.cfunc = set_ext_lang_command; |
3340 | ||
c5aa993b | 3341 | add_info ("extensions", info_ext_lang_command, |
c906108c | 3342 | "All filename extensions associated with a source language."); |
917317f4 JM |
3343 | |
3344 | add_show_from_set | |
3345 | (add_set_cmd ("download-write-size", class_obscure, | |
3346 | var_integer, (char *) &download_write_size, | |
3347 | "Set the write size used when downloading a program.\n" | |
3348 | "Only used when downloading a program onto a remote\n" | |
3349 | "target. Specify zero, or a negative value, to disable\n" | |
3350 | "blocked writes. The actual size of each transfer is also\n" | |
3351 | "limited by the size of the target packet and the memory\n" | |
3352 | "cache.\n", | |
3353 | &setlist), | |
3354 | &showlist); | |
c906108c | 3355 | } |