Commit | Line | Data |
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c906108c | 1 | /* Generic symbol file reading for the GNU debugger, GDB. |
d9fcf2fb | 2 | Copyright 1990-1996, 1998, 2000 Free Software Foundation, Inc. |
c906108c SS |
3 | Contributed by Cygnus Support, using pieces from other GDB modules. |
4 | ||
c5aa993b | 5 | This file is part of GDB. |
c906108c | 6 | |
c5aa993b JM |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
c906108c | 11 | |
c5aa993b JM |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
c906108c | 16 | |
c5aa993b JM |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
21 | |
22 | #include "defs.h" | |
23 | #include "symtab.h" | |
24 | #include "gdbtypes.h" | |
25 | #include "gdbcore.h" | |
26 | #include "frame.h" | |
27 | #include "target.h" | |
28 | #include "value.h" | |
29 | #include "symfile.h" | |
30 | #include "objfiles.h" | |
31 | #include "gdbcmd.h" | |
32 | #include "breakpoint.h" | |
33 | #include "language.h" | |
34 | #include "complaints.h" | |
35 | #include "demangle.h" | |
c5aa993b | 36 | #include "inferior.h" /* for write_pc */ |
c906108c SS |
37 | #include "gdb-stabs.h" |
38 | #include "obstack.h" | |
c5f0f3d0 | 39 | #include "completer.h" |
c906108c SS |
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); | |
507f3c78 KB |
72 | void (*pre_add_symbol_hook) (char *); |
73 | void (*post_add_symbol_hook) (void); | |
74 | void (*target_new_objfile_hook) (struct objfile *); | |
c906108c | 75 | |
74b7792f AC |
76 | static void clear_symtab_users_cleanup (void *ignore); |
77 | ||
c906108c | 78 | /* Global variables owned by this file */ |
c5aa993b | 79 | int readnow_symbol_files; /* Read full symbols immediately */ |
c906108c | 80 | |
c5aa993b JM |
81 | struct complaint oldsyms_complaint = |
82 | { | |
c906108c SS |
83 | "Replacing old symbols for `%s'", 0, 0 |
84 | }; | |
85 | ||
c5aa993b JM |
86 | struct complaint empty_symtab_complaint = |
87 | { | |
c906108c SS |
88 | "Empty symbol table found for `%s'", 0, 0 |
89 | }; | |
90 | ||
2acceee2 JM |
91 | struct complaint unknown_option_complaint = |
92 | { | |
93 | "Unknown option `%s' ignored", 0, 0 | |
94 | }; | |
95 | ||
c906108c SS |
96 | /* External variables and functions referenced. */ |
97 | ||
98 | extern int info_verbose; | |
99 | ||
a14ed312 | 100 | extern void report_transfer_performance (unsigned long, time_t, time_t); |
c906108c SS |
101 | |
102 | /* Functions this file defines */ | |
103 | ||
104 | #if 0 | |
a14ed312 KB |
105 | static int simple_read_overlay_region_table (void); |
106 | static void simple_free_overlay_region_table (void); | |
c906108c SS |
107 | #endif |
108 | ||
a14ed312 | 109 | static void set_initial_language (void); |
c906108c | 110 | |
a14ed312 | 111 | static void load_command (char *, int); |
c906108c | 112 | |
a14ed312 | 113 | static void add_symbol_file_command (char *, int); |
c906108c | 114 | |
a14ed312 | 115 | static void add_shared_symbol_files_command (char *, int); |
c906108c | 116 | |
a14ed312 | 117 | static void cashier_psymtab (struct partial_symtab *); |
c906108c | 118 | |
a14ed312 | 119 | static int compare_psymbols (const void *, const void *); |
c906108c | 120 | |
a14ed312 | 121 | static int compare_symbols (const void *, const void *); |
c906108c | 122 | |
a14ed312 | 123 | bfd *symfile_bfd_open (char *); |
c906108c | 124 | |
a14ed312 | 125 | static void find_sym_fns (struct objfile *); |
c906108c | 126 | |
a14ed312 | 127 | static void decrement_reading_symtab (void *); |
c906108c | 128 | |
a14ed312 | 129 | static void overlay_invalidate_all (void); |
c906108c | 130 | |
a14ed312 | 131 | static int overlay_is_mapped (struct obj_section *); |
c906108c | 132 | |
a14ed312 | 133 | void list_overlays_command (char *, int); |
c906108c | 134 | |
a14ed312 | 135 | void map_overlay_command (char *, int); |
c906108c | 136 | |
a14ed312 | 137 | void unmap_overlay_command (char *, int); |
c906108c | 138 | |
a14ed312 | 139 | static void overlay_auto_command (char *, int); |
c906108c | 140 | |
a14ed312 | 141 | static void overlay_manual_command (char *, int); |
c906108c | 142 | |
a14ed312 | 143 | static void overlay_off_command (char *, int); |
c906108c | 144 | |
a14ed312 | 145 | static void overlay_load_command (char *, int); |
c906108c | 146 | |
a14ed312 | 147 | static void overlay_command (char *, int); |
c906108c | 148 | |
a14ed312 | 149 | static void simple_free_overlay_table (void); |
c906108c | 150 | |
a14ed312 | 151 | static void read_target_long_array (CORE_ADDR, unsigned int *, int); |
c906108c | 152 | |
a14ed312 | 153 | static int simple_read_overlay_table (void); |
c906108c | 154 | |
a14ed312 | 155 | static int simple_overlay_update_1 (struct obj_section *); |
c906108c | 156 | |
a14ed312 | 157 | static void add_filename_language (char *ext, enum language lang); |
392a587b | 158 | |
a14ed312 | 159 | static void set_ext_lang_command (char *args, int from_tty); |
392a587b | 160 | |
a14ed312 | 161 | static void info_ext_lang_command (char *args, int from_tty); |
392a587b | 162 | |
a14ed312 | 163 | static void init_filename_language_table (void); |
392a587b | 164 | |
a14ed312 | 165 | void _initialize_symfile (void); |
c906108c SS |
166 | |
167 | /* List of all available sym_fns. On gdb startup, each object file reader | |
168 | calls add_symtab_fns() to register information on each format it is | |
169 | prepared to read. */ | |
170 | ||
171 | static struct sym_fns *symtab_fns = NULL; | |
172 | ||
173 | /* Flag for whether user will be reloading symbols multiple times. | |
174 | Defaults to ON for VxWorks, otherwise OFF. */ | |
175 | ||
176 | #ifdef SYMBOL_RELOADING_DEFAULT | |
177 | int symbol_reloading = SYMBOL_RELOADING_DEFAULT; | |
178 | #else | |
179 | int symbol_reloading = 0; | |
180 | #endif | |
181 | ||
182 | /* If non-zero, then on HP-UX (i.e., platforms that use somsolib.c), | |
183 | this variable is interpreted as a threshhold. If adding a new | |
184 | library's symbol table to those already known to the debugger would | |
185 | exceed this threshhold, then the shlib's symbols are not added. | |
186 | ||
187 | If non-zero on other platforms, shared library symbols will be added | |
188 | automatically when the inferior is created, new libraries are loaded, | |
189 | or when attaching to the inferior. This is almost always what users | |
190 | will want to have happen; but for very large programs, the startup | |
191 | time will be excessive, and so if this is a problem, the user can | |
192 | clear this flag and then add the shared library symbols as needed. | |
193 | Note that there is a potential for confusion, since if the shared | |
194 | library symbols are not loaded, commands like "info fun" will *not* | |
195 | report all the functions that are actually present. | |
196 | ||
197 | Note that HP-UX interprets this variable to mean, "threshhold size | |
198 | in megabytes, where zero means never add". Other platforms interpret | |
199 | this variable to mean, "always add if non-zero, never add if zero." | |
c5aa993b | 200 | */ |
c906108c SS |
201 | |
202 | int auto_solib_add = 1; | |
c906108c | 203 | \f |
c5aa993b | 204 | |
c906108c SS |
205 | /* Since this function is called from within qsort, in an ANSI environment |
206 | it must conform to the prototype for qsort, which specifies that the | |
207 | comparison function takes two "void *" pointers. */ | |
208 | ||
209 | static int | |
fba45db2 | 210 | compare_symbols (const PTR s1p, const PTR s2p) |
c906108c SS |
211 | { |
212 | register struct symbol **s1, **s2; | |
213 | ||
214 | s1 = (struct symbol **) s1p; | |
215 | s2 = (struct symbol **) s2p; | |
494b7ec9 | 216 | return (strcmp (SYMBOL_SOURCE_NAME (*s1), SYMBOL_SOURCE_NAME (*s2))); |
c906108c SS |
217 | } |
218 | ||
219 | /* | |
220 | ||
c5aa993b | 221 | LOCAL FUNCTION |
c906108c | 222 | |
c5aa993b | 223 | compare_psymbols -- compare two partial symbols by name |
c906108c | 224 | |
c5aa993b | 225 | DESCRIPTION |
c906108c | 226 | |
c5aa993b JM |
227 | Given pointers to pointers to two partial symbol table entries, |
228 | compare them by name and return -N, 0, or +N (ala strcmp). | |
229 | Typically used by sorting routines like qsort(). | |
c906108c | 230 | |
c5aa993b | 231 | NOTES |
c906108c | 232 | |
c5aa993b JM |
233 | Does direct compare of first two characters before punting |
234 | and passing to strcmp for longer compares. Note that the | |
235 | original version had a bug whereby two null strings or two | |
236 | identically named one character strings would return the | |
237 | comparison of memory following the null byte. | |
c906108c SS |
238 | |
239 | */ | |
240 | ||
241 | static int | |
fba45db2 | 242 | compare_psymbols (const PTR s1p, const PTR s2p) |
c906108c | 243 | { |
fba7f19c EZ |
244 | register struct partial_symbol **s1, **s2; |
245 | register char *st1, *st2; | |
246 | ||
247 | s1 = (struct partial_symbol **) s1p; | |
248 | s2 = (struct partial_symbol **) s2p; | |
249 | st1 = SYMBOL_SOURCE_NAME (*s1); | |
250 | st2 = SYMBOL_SOURCE_NAME (*s2); | |
251 | ||
c906108c SS |
252 | |
253 | if ((st1[0] - st2[0]) || !st1[0]) | |
254 | { | |
255 | return (st1[0] - st2[0]); | |
256 | } | |
257 | else if ((st1[1] - st2[1]) || !st1[1]) | |
258 | { | |
259 | return (st1[1] - st2[1]); | |
260 | } | |
261 | else | |
262 | { | |
c5aa993b | 263 | return (strcmp (st1, st2)); |
c906108c SS |
264 | } |
265 | } | |
266 | ||
267 | void | |
fba45db2 | 268 | sort_pst_symbols (struct partial_symtab *pst) |
c906108c SS |
269 | { |
270 | /* Sort the global list; don't sort the static list */ | |
271 | ||
c5aa993b JM |
272 | qsort (pst->objfile->global_psymbols.list + pst->globals_offset, |
273 | pst->n_global_syms, sizeof (struct partial_symbol *), | |
c906108c SS |
274 | compare_psymbols); |
275 | } | |
276 | ||
277 | /* Call sort_block_syms to sort alphabetically the symbols of one block. */ | |
278 | ||
279 | void | |
fba45db2 | 280 | sort_block_syms (register struct block *b) |
c906108c SS |
281 | { |
282 | qsort (&BLOCK_SYM (b, 0), BLOCK_NSYMS (b), | |
283 | sizeof (struct symbol *), compare_symbols); | |
284 | } | |
285 | ||
286 | /* Call sort_symtab_syms to sort alphabetically | |
287 | the symbols of each block of one symtab. */ | |
288 | ||
289 | void | |
fba45db2 | 290 | sort_symtab_syms (register struct symtab *s) |
c906108c SS |
291 | { |
292 | register struct blockvector *bv; | |
293 | int nbl; | |
294 | int i; | |
295 | register struct block *b; | |
296 | ||
297 | if (s == 0) | |
298 | return; | |
299 | bv = BLOCKVECTOR (s); | |
300 | nbl = BLOCKVECTOR_NBLOCKS (bv); | |
301 | for (i = 0; i < nbl; i++) | |
302 | { | |
303 | b = BLOCKVECTOR_BLOCK (bv, i); | |
304 | if (BLOCK_SHOULD_SORT (b)) | |
305 | sort_block_syms (b); | |
306 | } | |
307 | } | |
308 | ||
309 | /* Make a null terminated copy of the string at PTR with SIZE characters in | |
310 | the obstack pointed to by OBSTACKP . Returns the address of the copy. | |
311 | Note that the string at PTR does not have to be null terminated, I.E. it | |
312 | may be part of a larger string and we are only saving a substring. */ | |
313 | ||
314 | char * | |
fba45db2 | 315 | obsavestring (char *ptr, int size, struct obstack *obstackp) |
c906108c SS |
316 | { |
317 | register char *p = (char *) obstack_alloc (obstackp, size + 1); | |
318 | /* Open-coded memcpy--saves function call time. These strings are usually | |
319 | short. FIXME: Is this really still true with a compiler that can | |
320 | inline memcpy? */ | |
321 | { | |
322 | register char *p1 = ptr; | |
323 | register char *p2 = p; | |
324 | char *end = ptr + size; | |
325 | while (p1 != end) | |
326 | *p2++ = *p1++; | |
327 | } | |
328 | p[size] = 0; | |
329 | return p; | |
330 | } | |
331 | ||
332 | /* Concatenate strings S1, S2 and S3; return the new string. Space is found | |
333 | in the obstack pointed to by OBSTACKP. */ | |
334 | ||
335 | char * | |
fba45db2 KB |
336 | obconcat (struct obstack *obstackp, const char *s1, const char *s2, |
337 | const char *s3) | |
c906108c SS |
338 | { |
339 | register int len = strlen (s1) + strlen (s2) + strlen (s3) + 1; | |
340 | register char *val = (char *) obstack_alloc (obstackp, len); | |
341 | strcpy (val, s1); | |
342 | strcat (val, s2); | |
343 | strcat (val, s3); | |
344 | return val; | |
345 | } | |
346 | ||
347 | /* True if we are nested inside psymtab_to_symtab. */ | |
348 | ||
349 | int currently_reading_symtab = 0; | |
350 | ||
351 | static void | |
fba45db2 | 352 | decrement_reading_symtab (void *dummy) |
c906108c SS |
353 | { |
354 | currently_reading_symtab--; | |
355 | } | |
356 | ||
357 | /* Get the symbol table that corresponds to a partial_symtab. | |
358 | This is fast after the first time you do it. In fact, there | |
359 | is an even faster macro PSYMTAB_TO_SYMTAB that does the fast | |
360 | case inline. */ | |
361 | ||
362 | struct symtab * | |
fba45db2 | 363 | psymtab_to_symtab (register struct partial_symtab *pst) |
c906108c SS |
364 | { |
365 | /* If it's been looked up before, return it. */ | |
366 | if (pst->symtab) | |
367 | return pst->symtab; | |
368 | ||
369 | /* If it has not yet been read in, read it. */ | |
370 | if (!pst->readin) | |
c5aa993b | 371 | { |
c906108c SS |
372 | struct cleanup *back_to = make_cleanup (decrement_reading_symtab, NULL); |
373 | currently_reading_symtab++; | |
374 | (*pst->read_symtab) (pst); | |
375 | do_cleanups (back_to); | |
376 | } | |
377 | ||
378 | return pst->symtab; | |
379 | } | |
380 | ||
381 | /* Initialize entry point information for this objfile. */ | |
382 | ||
383 | void | |
fba45db2 | 384 | init_entry_point_info (struct objfile *objfile) |
c906108c SS |
385 | { |
386 | /* Save startup file's range of PC addresses to help blockframe.c | |
387 | decide where the bottom of the stack is. */ | |
388 | ||
c5aa993b | 389 | if (bfd_get_file_flags (objfile->obfd) & EXEC_P) |
c906108c SS |
390 | { |
391 | /* Executable file -- record its entry point so we'll recognize | |
c5aa993b JM |
392 | the startup file because it contains the entry point. */ |
393 | objfile->ei.entry_point = bfd_get_start_address (objfile->obfd); | |
c906108c SS |
394 | } |
395 | else | |
396 | { | |
397 | /* Examination of non-executable.o files. Short-circuit this stuff. */ | |
c5aa993b | 398 | objfile->ei.entry_point = INVALID_ENTRY_POINT; |
c906108c | 399 | } |
c5aa993b JM |
400 | objfile->ei.entry_file_lowpc = INVALID_ENTRY_LOWPC; |
401 | objfile->ei.entry_file_highpc = INVALID_ENTRY_HIGHPC; | |
402 | objfile->ei.entry_func_lowpc = INVALID_ENTRY_LOWPC; | |
403 | objfile->ei.entry_func_highpc = INVALID_ENTRY_HIGHPC; | |
404 | objfile->ei.main_func_lowpc = INVALID_ENTRY_LOWPC; | |
405 | objfile->ei.main_func_highpc = INVALID_ENTRY_HIGHPC; | |
c906108c SS |
406 | } |
407 | ||
408 | /* Get current entry point address. */ | |
409 | ||
410 | CORE_ADDR | |
fba45db2 | 411 | entry_point_address (void) |
c906108c SS |
412 | { |
413 | return symfile_objfile ? symfile_objfile->ei.entry_point : 0; | |
414 | } | |
415 | ||
416 | /* Remember the lowest-addressed loadable section we've seen. | |
417 | This function is called via bfd_map_over_sections. | |
418 | ||
419 | In case of equal vmas, the section with the largest size becomes the | |
420 | lowest-addressed loadable section. | |
421 | ||
422 | If the vmas and sizes are equal, the last section is considered the | |
423 | lowest-addressed loadable section. */ | |
424 | ||
425 | void | |
fba45db2 | 426 | find_lowest_section (bfd *abfd, asection *sect, PTR obj) |
c906108c | 427 | { |
c5aa993b | 428 | asection **lowest = (asection **) obj; |
c906108c SS |
429 | |
430 | if (0 == (bfd_get_section_flags (abfd, sect) & SEC_LOAD)) | |
431 | return; | |
432 | if (!*lowest) | |
433 | *lowest = sect; /* First loadable section */ | |
434 | else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect)) | |
435 | *lowest = sect; /* A lower loadable section */ | |
436 | else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect) | |
437 | && (bfd_section_size (abfd, (*lowest)) | |
438 | <= bfd_section_size (abfd, sect))) | |
439 | *lowest = sect; | |
440 | } | |
441 | ||
62557bbc KB |
442 | |
443 | /* Build (allocate and populate) a section_addr_info struct from | |
444 | an existing section table. */ | |
445 | ||
446 | extern struct section_addr_info * | |
447 | build_section_addr_info_from_section_table (const struct section_table *start, | |
448 | const struct section_table *end) | |
449 | { | |
450 | struct section_addr_info *sap; | |
451 | const struct section_table *stp; | |
452 | int oidx; | |
453 | ||
454 | sap = xmalloc (sizeof (struct section_addr_info)); | |
455 | memset (sap, 0, sizeof (struct section_addr_info)); | |
456 | ||
457 | for (stp = start, oidx = 0; stp != end; stp++) | |
458 | { | |
62557bbc KB |
459 | if (stp->the_bfd_section->flags & (SEC_ALLOC | SEC_LOAD) |
460 | && oidx < MAX_SECTIONS) | |
461 | { | |
462 | sap->other[oidx].addr = stp->addr; | |
463 | sap->other[oidx].name = xstrdup (stp->the_bfd_section->name); | |
464 | sap->other[oidx].sectindex = stp->the_bfd_section->index; | |
465 | oidx++; | |
466 | } | |
467 | } | |
468 | ||
469 | return sap; | |
470 | } | |
471 | ||
472 | ||
473 | /* Free all memory allocated by build_section_addr_info_from_section_table. */ | |
474 | ||
475 | extern void | |
476 | free_section_addr_info (struct section_addr_info *sap) | |
477 | { | |
478 | int idx; | |
479 | ||
480 | for (idx = 0; idx < MAX_SECTIONS; idx++) | |
481 | if (sap->other[idx].name) | |
b8c9b27d KB |
482 | xfree (sap->other[idx].name); |
483 | xfree (sap); | |
62557bbc KB |
484 | } |
485 | ||
486 | ||
c906108c SS |
487 | /* Parse the user's idea of an offset for dynamic linking, into our idea |
488 | of how to represent it for fast symbol reading. This is the default | |
489 | version of the sym_fns.sym_offsets function for symbol readers that | |
490 | don't need to do anything special. It allocates a section_offsets table | |
491 | for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */ | |
492 | ||
d4f3574e | 493 | void |
fba45db2 KB |
494 | default_symfile_offsets (struct objfile *objfile, |
495 | struct section_addr_info *addrs) | |
c906108c | 496 | { |
c906108c | 497 | int i; |
b8fbeb18 | 498 | asection *sect = NULL; |
c906108c SS |
499 | |
500 | objfile->num_sections = SECT_OFF_MAX; | |
d4f3574e | 501 | objfile->section_offsets = (struct section_offsets *) |
c5aa993b | 502 | obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS); |
d4f3574e | 503 | memset (objfile->section_offsets, 0, SIZEOF_SECTION_OFFSETS); |
c906108c | 504 | |
b8fbeb18 EZ |
505 | /* Now calculate offsets for section that were specified by the |
506 | caller. */ | |
2acceee2 JM |
507 | for (i = 0; i < MAX_SECTIONS && addrs->other[i].name; i++) |
508 | { | |
509 | struct other_sections *osp ; | |
510 | ||
511 | osp = &addrs->other[i] ; | |
b8fbeb18 | 512 | if (osp->addr == 0) |
2acceee2 | 513 | continue; |
b8fbeb18 | 514 | |
2acceee2 | 515 | /* Record all sections in offsets */ |
b8fbeb18 EZ |
516 | /* The section_offsets in the objfile are here filled in using |
517 | the BFD index. */ | |
a4c8257b | 518 | (objfile->section_offsets)->offsets[osp->sectindex] = osp->addr; |
2acceee2 | 519 | } |
c906108c | 520 | |
b8fbeb18 EZ |
521 | /* Remember the bfd indexes for the .text, .data, .bss and |
522 | .rodata sections. */ | |
523 | ||
524 | sect = bfd_get_section_by_name (objfile->obfd, ".text"); | |
525 | if (sect) | |
526 | objfile->sect_index_text = sect->index; | |
527 | ||
528 | sect = bfd_get_section_by_name (objfile->obfd, ".data"); | |
529 | if (sect) | |
530 | objfile->sect_index_data = sect->index; | |
531 | ||
532 | sect = bfd_get_section_by_name (objfile->obfd, ".bss"); | |
533 | if (sect) | |
534 | objfile->sect_index_bss = sect->index; | |
535 | ||
536 | sect = bfd_get_section_by_name (objfile->obfd, ".rodata"); | |
537 | if (sect) | |
538 | objfile->sect_index_rodata = sect->index; | |
539 | ||
540 | } | |
c906108c SS |
541 | |
542 | /* Process a symbol file, as either the main file or as a dynamically | |
543 | loaded file. | |
544 | ||
96baa820 JM |
545 | OBJFILE is where the symbols are to be read from. |
546 | ||
547 | ADDR is the address where the text segment was loaded, unless the | |
548 | objfile is the main symbol file, in which case it is zero. | |
549 | ||
550 | MAINLINE is nonzero if this is the main symbol file, or zero if | |
551 | it's an extra symbol file such as dynamically loaded code. | |
552 | ||
553 | VERBO is nonzero if the caller has printed a verbose message about | |
554 | the symbol reading (and complaints can be more terse about it). */ | |
c906108c SS |
555 | |
556 | void | |
fba45db2 KB |
557 | syms_from_objfile (struct objfile *objfile, struct section_addr_info *addrs, |
558 | int mainline, int verbo) | |
c906108c | 559 | { |
2acceee2 JM |
560 | asection *lower_sect; |
561 | asection *sect; | |
562 | CORE_ADDR lower_offset; | |
563 | struct section_addr_info local_addr; | |
c906108c | 564 | struct cleanup *old_chain; |
2acceee2 JM |
565 | int i; |
566 | ||
567 | /* If ADDRS is NULL, initialize the local section_addr_info struct and | |
568 | point ADDRS to it. We now establish the convention that an addr of | |
569 | zero means no load address was specified. */ | |
570 | ||
571 | if (addrs == NULL) | |
572 | { | |
573 | memset (&local_addr, 0, sizeof (local_addr)); | |
574 | addrs = &local_addr; | |
575 | } | |
c906108c SS |
576 | |
577 | init_entry_point_info (objfile); | |
578 | find_sym_fns (objfile); | |
579 | ||
580 | /* Make sure that partially constructed symbol tables will be cleaned up | |
581 | if an error occurs during symbol reading. */ | |
74b7792f | 582 | old_chain = make_cleanup_free_objfile (objfile); |
c906108c | 583 | |
c5aa993b | 584 | if (mainline) |
c906108c SS |
585 | { |
586 | /* We will modify the main symbol table, make sure that all its users | |
c5aa993b | 587 | will be cleaned up if an error occurs during symbol reading. */ |
74b7792f | 588 | make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/); |
c906108c SS |
589 | |
590 | /* Since no error yet, throw away the old symbol table. */ | |
591 | ||
592 | if (symfile_objfile != NULL) | |
593 | { | |
594 | free_objfile (symfile_objfile); | |
595 | symfile_objfile = NULL; | |
596 | } | |
597 | ||
598 | /* Currently we keep symbols from the add-symbol-file command. | |
c5aa993b JM |
599 | If the user wants to get rid of them, they should do "symbol-file" |
600 | without arguments first. Not sure this is the best behavior | |
601 | (PR 2207). */ | |
c906108c | 602 | |
c5aa993b | 603 | (*objfile->sf->sym_new_init) (objfile); |
c906108c SS |
604 | } |
605 | ||
606 | /* Convert addr into an offset rather than an absolute address. | |
607 | We find the lowest address of a loaded segment in the objfile, | |
53a5351d | 608 | and assume that <addr> is where that got loaded. |
c906108c | 609 | |
53a5351d JM |
610 | We no longer warn if the lowest section is not a text segment (as |
611 | happens for the PA64 port. */ | |
e7cf9df1 | 612 | if (!mainline) |
c906108c | 613 | { |
2acceee2 JM |
614 | /* Find lowest loadable section to be used as starting point for |
615 | continguous sections. FIXME!! won't work without call to find | |
616 | .text first, but this assumes text is lowest section. */ | |
617 | lower_sect = bfd_get_section_by_name (objfile->obfd, ".text"); | |
618 | if (lower_sect == NULL) | |
c906108c | 619 | bfd_map_over_sections (objfile->obfd, find_lowest_section, |
2acceee2 JM |
620 | (PTR) &lower_sect); |
621 | if (lower_sect == NULL) | |
c906108c SS |
622 | warning ("no loadable sections found in added symbol-file %s", |
623 | objfile->name); | |
b8fbeb18 EZ |
624 | else |
625 | if ((bfd_get_section_flags (objfile->obfd, lower_sect) & SEC_CODE) == 0) | |
626 | warning ("Lowest section in %s is %s at %s", | |
627 | objfile->name, | |
628 | bfd_section_name (objfile->obfd, lower_sect), | |
629 | paddr (bfd_section_vma (objfile->obfd, lower_sect))); | |
2acceee2 JM |
630 | if (lower_sect != NULL) |
631 | lower_offset = bfd_section_vma (objfile->obfd, lower_sect); | |
632 | else | |
633 | lower_offset = 0; | |
634 | ||
635 | /* Calculate offsets for the loadable sections. | |
636 | FIXME! Sections must be in order of increasing loadable section | |
637 | so that contiguous sections can use the lower-offset!!! | |
638 | ||
639 | Adjust offsets if the segments are not contiguous. | |
640 | If the section is contiguous, its offset should be set to | |
641 | the offset of the highest loadable section lower than it | |
642 | (the loadable section directly below it in memory). | |
643 | this_offset = lower_offset = lower_addr - lower_orig_addr */ | |
644 | ||
e7cf9df1 | 645 | /* Calculate offsets for sections. */ |
2acceee2 JM |
646 | for (i=0 ; i < MAX_SECTIONS && addrs->other[i].name; i++) |
647 | { | |
e7cf9df1 | 648 | if (addrs->other[i].addr != 0) |
2acceee2 | 649 | { |
e7cf9df1 | 650 | sect = bfd_get_section_by_name (objfile->obfd, addrs->other[i].name); |
2acceee2 JM |
651 | if (sect) |
652 | { | |
653 | addrs->other[i].addr -= bfd_section_vma (objfile->obfd, sect); | |
654 | lower_offset = addrs->other[i].addr; | |
e7cf9df1 | 655 | /* This is the index used by BFD. */ |
2acceee2 JM |
656 | addrs->other[i].sectindex = sect->index ; |
657 | } | |
658 | else | |
659 | { | |
660 | warning ("section %s not found in %s", addrs->other[i].name, | |
661 | objfile->name); | |
662 | addrs->other[i].addr = 0; | |
663 | } | |
664 | } | |
665 | else | |
666 | addrs->other[i].addr = lower_offset; | |
667 | } | |
c906108c SS |
668 | } |
669 | ||
670 | /* Initialize symbol reading routines for this objfile, allow complaints to | |
671 | appear for this new file, and record how verbose to be, then do the | |
672 | initial symbol reading for this file. */ | |
673 | ||
c5aa993b | 674 | (*objfile->sf->sym_init) (objfile); |
c906108c SS |
675 | clear_complaints (1, verbo); |
676 | ||
2acceee2 | 677 | (*objfile->sf->sym_offsets) (objfile, addrs); |
c906108c SS |
678 | |
679 | #ifndef IBM6000_TARGET | |
680 | /* This is a SVR4/SunOS specific hack, I think. In any event, it | |
681 | screws RS/6000. sym_offsets should be doing this sort of thing, | |
682 | because it knows the mapping between bfd sections and | |
683 | section_offsets. */ | |
684 | /* This is a hack. As far as I can tell, section offsets are not | |
685 | target dependent. They are all set to addr with a couple of | |
686 | exceptions. The exceptions are sysvr4 shared libraries, whose | |
687 | offsets are kept in solib structures anyway and rs6000 xcoff | |
688 | which handles shared libraries in a completely unique way. | |
689 | ||
690 | Section offsets are built similarly, except that they are built | |
691 | by adding addr in all cases because there is no clear mapping | |
692 | from section_offsets into actual sections. Note that solib.c | |
96baa820 | 693 | has a different algorithm for finding section offsets. |
c906108c SS |
694 | |
695 | These should probably all be collapsed into some target | |
696 | independent form of shared library support. FIXME. */ | |
697 | ||
2acceee2 | 698 | if (addrs) |
c906108c SS |
699 | { |
700 | struct obj_section *s; | |
701 | ||
2acceee2 JM |
702 | /* Map section offsets in "addr" back to the object's |
703 | sections by comparing the section names with bfd's | |
704 | section names. Then adjust the section address by | |
705 | the offset. */ /* for gdb/13815 */ | |
706 | ||
96baa820 | 707 | ALL_OBJFILE_OSECTIONS (objfile, s) |
c906108c | 708 | { |
2acceee2 JM |
709 | CORE_ADDR s_addr = 0; |
710 | int i; | |
711 | ||
62557bbc KB |
712 | for (i = 0; |
713 | !s_addr && i < MAX_SECTIONS && addrs->other[i].name; | |
714 | i++) | |
2acceee2 JM |
715 | if (strcmp (s->the_bfd_section->name, addrs->other[i].name) == 0) |
716 | s_addr = addrs->other[i].addr; /* end added for gdb/13815 */ | |
717 | ||
c906108c | 718 | s->addr -= s->offset; |
2acceee2 | 719 | s->addr += s_addr; |
c906108c | 720 | s->endaddr -= s->offset; |
2acceee2 JM |
721 | s->endaddr += s_addr; |
722 | s->offset += s_addr; | |
c906108c SS |
723 | } |
724 | } | |
725 | #endif /* not IBM6000_TARGET */ | |
726 | ||
96baa820 | 727 | (*objfile->sf->sym_read) (objfile, mainline); |
c906108c SS |
728 | |
729 | if (!have_partial_symbols () && !have_full_symbols ()) | |
730 | { | |
731 | wrap_here (""); | |
732 | printf_filtered ("(no debugging symbols found)..."); | |
733 | wrap_here (""); | |
734 | } | |
735 | ||
736 | /* Don't allow char * to have a typename (else would get caddr_t). | |
737 | Ditto void *. FIXME: Check whether this is now done by all the | |
738 | symbol readers themselves (many of them now do), and if so remove | |
739 | it from here. */ | |
740 | ||
741 | TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0; | |
742 | TYPE_NAME (lookup_pointer_type (builtin_type_void)) = 0; | |
743 | ||
744 | /* Mark the objfile has having had initial symbol read attempted. Note | |
745 | that this does not mean we found any symbols... */ | |
746 | ||
c5aa993b | 747 | objfile->flags |= OBJF_SYMS; |
c906108c SS |
748 | |
749 | /* Discard cleanups as symbol reading was successful. */ | |
750 | ||
751 | discard_cleanups (old_chain); | |
752 | ||
96baa820 | 753 | /* Call this after reading in a new symbol table to give target |
38c2ef12 | 754 | dependent code a crack at the new symbols. For instance, this |
96baa820 JM |
755 | could be used to update the values of target-specific symbols GDB |
756 | needs to keep track of (such as _sigtramp, or whatever). */ | |
c906108c SS |
757 | |
758 | TARGET_SYMFILE_POSTREAD (objfile); | |
759 | } | |
760 | ||
761 | /* Perform required actions after either reading in the initial | |
762 | symbols for a new objfile, or mapping in the symbols from a reusable | |
763 | objfile. */ | |
c5aa993b | 764 | |
c906108c | 765 | void |
fba45db2 | 766 | new_symfile_objfile (struct objfile *objfile, int mainline, int verbo) |
c906108c SS |
767 | { |
768 | ||
769 | /* If this is the main symbol file we have to clean up all users of the | |
770 | old main symbol file. Otherwise it is sufficient to fixup all the | |
771 | breakpoints that may have been redefined by this symbol file. */ | |
772 | if (mainline) | |
773 | { | |
774 | /* OK, make it the "real" symbol file. */ | |
775 | symfile_objfile = objfile; | |
776 | ||
777 | clear_symtab_users (); | |
778 | } | |
779 | else | |
780 | { | |
781 | breakpoint_re_set (); | |
782 | } | |
783 | ||
784 | /* We're done reading the symbol file; finish off complaints. */ | |
785 | clear_complaints (0, verbo); | |
786 | } | |
787 | ||
788 | /* Process a symbol file, as either the main file or as a dynamically | |
789 | loaded file. | |
790 | ||
791 | NAME is the file name (which will be tilde-expanded and made | |
792 | absolute herein) (but we don't free or modify NAME itself). | |
793 | FROM_TTY says how verbose to be. MAINLINE specifies whether this | |
794 | is the main symbol file, or whether it's an extra symbol file such | |
795 | as dynamically loaded code. If !mainline, ADDR is the address | |
796 | where the text segment was loaded. | |
797 | ||
c906108c SS |
798 | Upon success, returns a pointer to the objfile that was added. |
799 | Upon failure, jumps back to command level (never returns). */ | |
800 | ||
801 | struct objfile * | |
fba45db2 KB |
802 | symbol_file_add (char *name, int from_tty, struct section_addr_info *addrs, |
803 | int mainline, int flags) | |
c906108c SS |
804 | { |
805 | struct objfile *objfile; | |
806 | struct partial_symtab *psymtab; | |
807 | bfd *abfd; | |
808 | ||
809 | /* Open a bfd for the file, and give user a chance to burp if we'd be | |
810 | interactively wiping out any existing symbols. */ | |
811 | ||
812 | abfd = symfile_bfd_open (name); | |
813 | ||
814 | if ((have_full_symbols () || have_partial_symbols ()) | |
815 | && mainline | |
816 | && from_tty | |
817 | && !query ("Load new symbol table from \"%s\"? ", name)) | |
c5aa993b | 818 | error ("Not confirmed."); |
c906108c | 819 | |
2df3850c | 820 | objfile = allocate_objfile (abfd, flags); |
c906108c SS |
821 | |
822 | /* If the objfile uses a mapped symbol file, and we have a psymtab for | |
823 | it, then skip reading any symbols at this time. */ | |
824 | ||
c5aa993b | 825 | if ((objfile->flags & OBJF_MAPPED) && (objfile->flags & OBJF_SYMS)) |
c906108c SS |
826 | { |
827 | /* We mapped in an existing symbol table file that already has had | |
c5aa993b JM |
828 | initial symbol reading performed, so we can skip that part. Notify |
829 | the user that instead of reading the symbols, they have been mapped. | |
830 | */ | |
c906108c SS |
831 | if (from_tty || info_verbose) |
832 | { | |
833 | printf_filtered ("Mapped symbols for %s...", name); | |
834 | wrap_here (""); | |
835 | gdb_flush (gdb_stdout); | |
836 | } | |
837 | init_entry_point_info (objfile); | |
838 | find_sym_fns (objfile); | |
839 | } | |
840 | else | |
841 | { | |
842 | /* We either created a new mapped symbol table, mapped an existing | |
c5aa993b JM |
843 | symbol table file which has not had initial symbol reading |
844 | performed, or need to read an unmapped symbol table. */ | |
c906108c SS |
845 | if (from_tty || info_verbose) |
846 | { | |
847 | if (pre_add_symbol_hook) | |
848 | pre_add_symbol_hook (name); | |
849 | else | |
850 | { | |
851 | printf_filtered ("Reading symbols from %s...", name); | |
852 | wrap_here (""); | |
853 | gdb_flush (gdb_stdout); | |
854 | } | |
855 | } | |
2acceee2 | 856 | syms_from_objfile (objfile, addrs, mainline, from_tty); |
c906108c SS |
857 | } |
858 | ||
859 | /* We now have at least a partial symbol table. Check to see if the | |
860 | user requested that all symbols be read on initial access via either | |
861 | the gdb startup command line or on a per symbol file basis. Expand | |
862 | all partial symbol tables for this objfile if so. */ | |
863 | ||
2acceee2 | 864 | if ((flags & OBJF_READNOW) || readnow_symbol_files) |
c906108c SS |
865 | { |
866 | if (from_tty || info_verbose) | |
867 | { | |
868 | printf_filtered ("expanding to full symbols..."); | |
869 | wrap_here (""); | |
870 | gdb_flush (gdb_stdout); | |
871 | } | |
872 | ||
c5aa993b | 873 | for (psymtab = objfile->psymtabs; |
c906108c | 874 | psymtab != NULL; |
c5aa993b | 875 | psymtab = psymtab->next) |
c906108c SS |
876 | { |
877 | psymtab_to_symtab (psymtab); | |
878 | } | |
879 | } | |
880 | ||
881 | if (from_tty || info_verbose) | |
882 | { | |
883 | if (post_add_symbol_hook) | |
c5aa993b | 884 | post_add_symbol_hook (); |
c906108c | 885 | else |
c5aa993b JM |
886 | { |
887 | printf_filtered ("done.\n"); | |
888 | gdb_flush (gdb_stdout); | |
889 | } | |
c906108c SS |
890 | } |
891 | ||
892 | new_symfile_objfile (objfile, mainline, from_tty); | |
893 | ||
11cf8741 JM |
894 | if (target_new_objfile_hook) |
895 | target_new_objfile_hook (objfile); | |
c906108c SS |
896 | |
897 | return (objfile); | |
898 | } | |
899 | ||
900 | /* This is the symbol-file command. Read the file, analyze its | |
901 | symbols, and add a struct symtab to a symtab list. The syntax of | |
902 | the command is rather bizarre--(1) buildargv implements various | |
903 | quoting conventions which are undocumented and have little or | |
904 | nothing in common with the way things are quoted (or not quoted) | |
905 | elsewhere in GDB, (2) options are used, which are not generally | |
906 | used in GDB (perhaps "set mapped on", "set readnow on" would be | |
907 | better), (3) the order of options matters, which is contrary to GNU | |
908 | conventions (because it is confusing and inconvenient). */ | |
4da95fc4 EZ |
909 | /* Note: ezannoni 2000-04-17. This function used to have support for |
910 | rombug (see remote-os9k.c). It consisted of a call to target_link() | |
911 | (target.c) to get the address of the text segment from the target, | |
912 | and pass that to symbol_file_add(). This is no longer supported. */ | |
c906108c SS |
913 | |
914 | void | |
fba45db2 | 915 | symbol_file_command (char *args, int from_tty) |
c906108c SS |
916 | { |
917 | char **argv; | |
918 | char *name = NULL; | |
c906108c | 919 | struct cleanup *cleanups; |
2df3850c | 920 | int flags = OBJF_USERLOADED; |
c906108c SS |
921 | |
922 | dont_repeat (); | |
923 | ||
924 | if (args == NULL) | |
925 | { | |
926 | if ((have_full_symbols () || have_partial_symbols ()) | |
927 | && from_tty | |
928 | && !query ("Discard symbol table from `%s'? ", | |
c5aa993b | 929 | symfile_objfile->name)) |
c906108c SS |
930 | error ("Not confirmed."); |
931 | free_all_objfiles (); | |
932 | ||
933 | /* solib descriptors may have handles to objfiles. Since their | |
934 | storage has just been released, we'd better wipe the solib | |
935 | descriptors as well. | |
c5aa993b | 936 | */ |
c906108c SS |
937 | #if defined(SOLIB_RESTART) |
938 | SOLIB_RESTART (); | |
939 | #endif | |
940 | ||
941 | symfile_objfile = NULL; | |
942 | if (from_tty) | |
c906108c | 943 | printf_unfiltered ("No symbol file now.\n"); |
c906108c SS |
944 | #ifdef HPUXHPPA |
945 | RESET_HP_UX_GLOBALS (); | |
946 | #endif | |
947 | } | |
948 | else | |
949 | { | |
950 | if ((argv = buildargv (args)) == NULL) | |
951 | { | |
952 | nomem (0); | |
953 | } | |
7a292a7a | 954 | cleanups = make_cleanup_freeargv (argv); |
c906108c SS |
955 | while (*argv != NULL) |
956 | { | |
957 | if (STREQ (*argv, "-mapped")) | |
4da95fc4 EZ |
958 | flags |= OBJF_MAPPED; |
959 | else | |
960 | if (STREQ (*argv, "-readnow")) | |
2acceee2 | 961 | flags |= OBJF_READNOW; |
4da95fc4 EZ |
962 | else |
963 | if (**argv == '-') | |
964 | error ("unknown option `%s'", *argv); | |
c5aa993b | 965 | else |
c5aa993b | 966 | { |
4da95fc4 | 967 | name = *argv; |
2df3850c | 968 | symbol_file_add (name, from_tty, NULL, 1, flags); |
c906108c | 969 | #ifdef HPUXHPPA |
c5aa993b | 970 | RESET_HP_UX_GLOBALS (); |
c906108c | 971 | #endif |
4da95fc4 EZ |
972 | /* Getting new symbols may change our opinion about |
973 | what is frameless. */ | |
974 | reinit_frame_cache (); | |
c906108c | 975 | |
4da95fc4 EZ |
976 | set_initial_language (); |
977 | } | |
c906108c SS |
978 | argv++; |
979 | } | |
980 | ||
981 | if (name == NULL) | |
982 | { | |
983 | error ("no symbol file name was specified"); | |
984 | } | |
c5aa993b | 985 | TUIDO (((TuiOpaqueFuncPtr) tuiDisplayMainFunction)); |
c906108c SS |
986 | do_cleanups (cleanups); |
987 | } | |
988 | } | |
989 | ||
990 | /* Set the initial language. | |
991 | ||
992 | A better solution would be to record the language in the psymtab when reading | |
993 | partial symbols, and then use it (if known) to set the language. This would | |
994 | be a win for formats that encode the language in an easily discoverable place, | |
995 | such as DWARF. For stabs, we can jump through hoops looking for specially | |
996 | named symbols or try to intuit the language from the specific type of stabs | |
997 | we find, but we can't do that until later when we read in full symbols. | |
998 | FIXME. */ | |
999 | ||
1000 | static void | |
fba45db2 | 1001 | set_initial_language (void) |
c906108c SS |
1002 | { |
1003 | struct partial_symtab *pst; | |
c5aa993b | 1004 | enum language lang = language_unknown; |
c906108c SS |
1005 | |
1006 | pst = find_main_psymtab (); | |
1007 | if (pst != NULL) | |
1008 | { | |
c5aa993b | 1009 | if (pst->filename != NULL) |
c906108c | 1010 | { |
c5aa993b JM |
1011 | lang = deduce_language_from_filename (pst->filename); |
1012 | } | |
c906108c SS |
1013 | if (lang == language_unknown) |
1014 | { | |
c5aa993b JM |
1015 | /* Make C the default language */ |
1016 | lang = language_c; | |
c906108c SS |
1017 | } |
1018 | set_language (lang); | |
1019 | expected_language = current_language; /* Don't warn the user */ | |
1020 | } | |
1021 | } | |
1022 | ||
1023 | /* Open file specified by NAME and hand it off to BFD for preliminary | |
1024 | analysis. Result is a newly initialized bfd *, which includes a newly | |
1025 | malloc'd` copy of NAME (tilde-expanded and made absolute). | |
1026 | In case of trouble, error() is called. */ | |
1027 | ||
1028 | bfd * | |
fba45db2 | 1029 | symfile_bfd_open (char *name) |
c906108c SS |
1030 | { |
1031 | bfd *sym_bfd; | |
1032 | int desc; | |
1033 | char *absolute_name; | |
1034 | ||
1035 | ||
1036 | ||
1037 | name = tilde_expand (name); /* Returns 1st new malloc'd copy */ | |
1038 | ||
1039 | /* Look down path for it, allocate 2nd new malloc'd copy. */ | |
1040 | desc = openp (getenv ("PATH"), 1, name, O_RDONLY | O_BINARY, 0, &absolute_name); | |
1041 | #if defined(__GO32__) || defined(_WIN32) | |
1042 | if (desc < 0) | |
1043 | { | |
1044 | char *exename = alloca (strlen (name) + 5); | |
1045 | strcat (strcpy (exename, name), ".exe"); | |
1046 | desc = openp (getenv ("PATH"), 1, exename, O_RDONLY | O_BINARY, | |
c5aa993b | 1047 | 0, &absolute_name); |
c906108c SS |
1048 | } |
1049 | #endif | |
1050 | if (desc < 0) | |
1051 | { | |
b8c9b27d | 1052 | make_cleanup (xfree, name); |
c906108c SS |
1053 | perror_with_name (name); |
1054 | } | |
b8c9b27d | 1055 | xfree (name); /* Free 1st new malloc'd copy */ |
c906108c | 1056 | name = absolute_name; /* Keep 2nd malloc'd copy in bfd */ |
c5aa993b | 1057 | /* It'll be freed in free_objfile(). */ |
c906108c SS |
1058 | |
1059 | sym_bfd = bfd_fdopenr (name, gnutarget, desc); | |
1060 | if (!sym_bfd) | |
1061 | { | |
1062 | close (desc); | |
b8c9b27d | 1063 | make_cleanup (xfree, name); |
c906108c SS |
1064 | error ("\"%s\": can't open to read symbols: %s.", name, |
1065 | bfd_errmsg (bfd_get_error ())); | |
1066 | } | |
1067 | sym_bfd->cacheable = true; | |
1068 | ||
1069 | if (!bfd_check_format (sym_bfd, bfd_object)) | |
1070 | { | |
1071 | /* FIXME: should be checking for errors from bfd_close (for one thing, | |
c5aa993b JM |
1072 | on error it does not free all the storage associated with the |
1073 | bfd). */ | |
c906108c | 1074 | bfd_close (sym_bfd); /* This also closes desc */ |
b8c9b27d | 1075 | make_cleanup (xfree, name); |
c906108c SS |
1076 | error ("\"%s\": can't read symbols: %s.", name, |
1077 | bfd_errmsg (bfd_get_error ())); | |
1078 | } | |
1079 | return (sym_bfd); | |
1080 | } | |
1081 | ||
1082 | /* Link a new symtab_fns into the global symtab_fns list. Called on gdb | |
1083 | startup by the _initialize routine in each object file format reader, | |
1084 | to register information about each format the the reader is prepared | |
1085 | to handle. */ | |
1086 | ||
1087 | void | |
fba45db2 | 1088 | add_symtab_fns (struct sym_fns *sf) |
c906108c SS |
1089 | { |
1090 | sf->next = symtab_fns; | |
1091 | symtab_fns = sf; | |
1092 | } | |
1093 | ||
1094 | ||
1095 | /* Initialize to read symbols from the symbol file sym_bfd. It either | |
1096 | returns or calls error(). The result is an initialized struct sym_fns | |
1097 | in the objfile structure, that contains cached information about the | |
1098 | symbol file. */ | |
1099 | ||
1100 | static void | |
fba45db2 | 1101 | find_sym_fns (struct objfile *objfile) |
c906108c SS |
1102 | { |
1103 | struct sym_fns *sf; | |
c5aa993b JM |
1104 | enum bfd_flavour our_flavour = bfd_get_flavour (objfile->obfd); |
1105 | char *our_target = bfd_get_target (objfile->obfd); | |
c906108c | 1106 | |
c906108c SS |
1107 | /* Special kludge for apollo. See dstread.c. */ |
1108 | if (STREQN (our_target, "apollo", 6)) | |
c5aa993b | 1109 | our_flavour = (enum bfd_flavour) -2; |
c906108c | 1110 | |
c5aa993b | 1111 | for (sf = symtab_fns; sf != NULL; sf = sf->next) |
c906108c | 1112 | { |
c5aa993b | 1113 | if (our_flavour == sf->sym_flavour) |
c906108c | 1114 | { |
c5aa993b | 1115 | objfile->sf = sf; |
c906108c SS |
1116 | return; |
1117 | } | |
1118 | } | |
1119 | error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.", | |
c5aa993b | 1120 | bfd_get_target (objfile->obfd)); |
c906108c SS |
1121 | } |
1122 | \f | |
1123 | /* This function runs the load command of our current target. */ | |
1124 | ||
1125 | static void | |
fba45db2 | 1126 | load_command (char *arg, int from_tty) |
c906108c SS |
1127 | { |
1128 | if (arg == NULL) | |
1129 | arg = get_exec_file (1); | |
1130 | target_load (arg, from_tty); | |
1131 | } | |
1132 | ||
1133 | /* This version of "load" should be usable for any target. Currently | |
1134 | it is just used for remote targets, not inftarg.c or core files, | |
1135 | on the theory that only in that case is it useful. | |
1136 | ||
1137 | Avoiding xmodem and the like seems like a win (a) because we don't have | |
1138 | to worry about finding it, and (b) On VMS, fork() is very slow and so | |
1139 | we don't want to run a subprocess. On the other hand, I'm not sure how | |
1140 | performance compares. */ | |
917317f4 JM |
1141 | |
1142 | static int download_write_size = 512; | |
1143 | static int validate_download = 0; | |
1144 | ||
c906108c | 1145 | void |
917317f4 | 1146 | generic_load (char *args, int from_tty) |
c906108c | 1147 | { |
c906108c SS |
1148 | asection *s; |
1149 | bfd *loadfile_bfd; | |
1150 | time_t start_time, end_time; /* Start and end times of download */ | |
1151 | unsigned long data_count = 0; /* Number of bytes transferred to memory */ | |
917317f4 JM |
1152 | unsigned long write_count = 0; /* Number of writes needed. */ |
1153 | unsigned long load_offset; /* offset to add to vma for each section */ | |
1154 | char *filename; | |
1155 | struct cleanup *old_cleanups; | |
1156 | char *offptr; | |
c2d11a7d JM |
1157 | CORE_ADDR total_size = 0; |
1158 | CORE_ADDR total_sent = 0; | |
917317f4 JM |
1159 | |
1160 | /* Parse the input argument - the user can specify a load offset as | |
1161 | a second argument. */ | |
1162 | filename = xmalloc (strlen (args) + 1); | |
b8c9b27d | 1163 | old_cleanups = make_cleanup (xfree, filename); |
917317f4 JM |
1164 | strcpy (filename, args); |
1165 | offptr = strchr (filename, ' '); | |
1166 | if (offptr != NULL) | |
1167 | { | |
1168 | char *endptr; | |
1169 | load_offset = strtoul (offptr, &endptr, 0); | |
1170 | if (offptr == endptr) | |
1171 | error ("Invalid download offset:%s\n", offptr); | |
1172 | *offptr = '\0'; | |
1173 | } | |
c906108c SS |
1174 | else |
1175 | load_offset = 0; | |
1176 | ||
917317f4 | 1177 | /* Open the file for loading. */ |
c906108c SS |
1178 | loadfile_bfd = bfd_openr (filename, gnutarget); |
1179 | if (loadfile_bfd == NULL) | |
1180 | { | |
1181 | perror_with_name (filename); | |
1182 | return; | |
1183 | } | |
917317f4 | 1184 | |
c906108c SS |
1185 | /* FIXME: should be checking for errors from bfd_close (for one thing, |
1186 | on error it does not free all the storage associated with the | |
1187 | bfd). */ | |
5c65bbb6 | 1188 | make_cleanup_bfd_close (loadfile_bfd); |
c906108c | 1189 | |
c5aa993b | 1190 | if (!bfd_check_format (loadfile_bfd, bfd_object)) |
c906108c SS |
1191 | { |
1192 | error ("\"%s\" is not an object file: %s", filename, | |
1193 | bfd_errmsg (bfd_get_error ())); | |
1194 | } | |
c5aa993b | 1195 | |
c2d11a7d JM |
1196 | for (s = loadfile_bfd->sections; s; s = s->next) |
1197 | if (s->flags & SEC_LOAD) | |
1198 | total_size += bfd_get_section_size_before_reloc (s); | |
1199 | ||
c906108c SS |
1200 | start_time = time (NULL); |
1201 | ||
c5aa993b JM |
1202 | for (s = loadfile_bfd->sections; s; s = s->next) |
1203 | { | |
1204 | if (s->flags & SEC_LOAD) | |
1205 | { | |
917317f4 | 1206 | CORE_ADDR size = bfd_get_section_size_before_reloc (s); |
c5aa993b JM |
1207 | if (size > 0) |
1208 | { | |
1209 | char *buffer; | |
1210 | struct cleanup *old_chain; | |
917317f4 JM |
1211 | CORE_ADDR lma = s->lma + load_offset; |
1212 | CORE_ADDR block_size; | |
c5aa993b | 1213 | int err; |
917317f4 JM |
1214 | const char *sect_name = bfd_get_section_name (loadfile_bfd, s); |
1215 | CORE_ADDR sent; | |
c5aa993b | 1216 | |
917317f4 JM |
1217 | if (download_write_size > 0 && size > download_write_size) |
1218 | block_size = download_write_size; | |
1219 | else | |
1220 | block_size = size; | |
c5aa993b JM |
1221 | |
1222 | buffer = xmalloc (size); | |
b8c9b27d | 1223 | old_chain = make_cleanup (xfree, buffer); |
c5aa993b | 1224 | |
c5aa993b JM |
1225 | /* Is this really necessary? I guess it gives the user something |
1226 | to look at during a long download. */ | |
8b93c638 JM |
1227 | #ifdef UI_OUT |
1228 | ui_out_message (uiout, 0, "Loading section %s, size 0x%s lma 0x%s\n", | |
1229 | sect_name, paddr_nz (size), paddr_nz (lma)); | |
1230 | #else | |
917317f4 JM |
1231 | fprintf_unfiltered (gdb_stdout, |
1232 | "Loading section %s, size 0x%s lma 0x%s\n", | |
1233 | sect_name, paddr_nz (size), paddr_nz (lma)); | |
8b93c638 | 1234 | #endif |
c5aa993b JM |
1235 | |
1236 | bfd_get_section_contents (loadfile_bfd, s, buffer, 0, size); | |
1237 | ||
c5aa993b JM |
1238 | sent = 0; |
1239 | do | |
1240 | { | |
917317f4 JM |
1241 | CORE_ADDR len; |
1242 | CORE_ADDR this_transfer = size - sent; | |
1243 | if (this_transfer >= block_size) | |
1244 | this_transfer = block_size; | |
1245 | len = target_write_memory_partial (lma, buffer, | |
1246 | this_transfer, &err); | |
c5aa993b JM |
1247 | if (err) |
1248 | break; | |
917317f4 JM |
1249 | if (validate_download) |
1250 | { | |
1251 | /* Broken memories and broken monitors manifest | |
1252 | themselves here when bring new computers to | |
1253 | life. This doubles already slow downloads. */ | |
1254 | /* NOTE: cagney/1999-10-18: A more efficient | |
1255 | implementation might add a verify_memory() | |
1256 | method to the target vector and then use | |
1257 | that. remote.c could implement that method | |
1258 | using the ``qCRC'' packet. */ | |
1259 | char *check = xmalloc (len); | |
b8c9b27d | 1260 | struct cleanup *verify_cleanups = make_cleanup (xfree, check); |
917317f4 JM |
1261 | if (target_read_memory (lma, check, len) != 0) |
1262 | error ("Download verify read failed at 0x%s", | |
1263 | paddr (lma)); | |
1264 | if (memcmp (buffer, check, len) != 0) | |
1265 | error ("Download verify compare failed at 0x%s", | |
1266 | paddr (lma)); | |
1267 | do_cleanups (verify_cleanups); | |
1268 | } | |
c5aa993b JM |
1269 | data_count += len; |
1270 | lma += len; | |
1271 | buffer += len; | |
917317f4 JM |
1272 | write_count += 1; |
1273 | sent += len; | |
c2d11a7d | 1274 | total_sent += len; |
917317f4 JM |
1275 | if (quit_flag |
1276 | || (ui_load_progress_hook != NULL | |
1277 | && ui_load_progress_hook (sect_name, sent))) | |
1278 | error ("Canceled the download"); | |
c2d11a7d JM |
1279 | |
1280 | if (show_load_progress != NULL) | |
1281 | show_load_progress (sect_name, sent, size, total_sent, total_size); | |
917317f4 JM |
1282 | } |
1283 | while (sent < size); | |
c5aa993b JM |
1284 | |
1285 | if (err != 0) | |
917317f4 | 1286 | error ("Memory access error while loading section %s.", sect_name); |
c906108c | 1287 | |
c5aa993b JM |
1288 | do_cleanups (old_chain); |
1289 | } | |
1290 | } | |
c906108c SS |
1291 | } |
1292 | ||
1293 | end_time = time (NULL); | |
1294 | { | |
917317f4 | 1295 | CORE_ADDR entry; |
c5aa993b | 1296 | entry = bfd_get_start_address (loadfile_bfd); |
8b93c638 JM |
1297 | #ifdef UI_OUT |
1298 | ui_out_text (uiout, "Start address "); | |
1299 | ui_out_field_fmt (uiout, "address", "0x%s" , paddr_nz (entry)); | |
1300 | ui_out_text (uiout, ", load size "); | |
1301 | ui_out_field_fmt (uiout, "load-size", "%ld" , data_count); | |
1302 | ui_out_text (uiout, "\n"); | |
1303 | ||
1304 | #else | |
917317f4 JM |
1305 | fprintf_unfiltered (gdb_stdout, |
1306 | "Start address 0x%s , load size %ld\n", | |
1307 | paddr_nz (entry), data_count); | |
8b93c638 | 1308 | #endif |
c906108c SS |
1309 | /* We were doing this in remote-mips.c, I suspect it is right |
1310 | for other targets too. */ | |
1311 | write_pc (entry); | |
1312 | } | |
1313 | ||
1314 | /* FIXME: are we supposed to call symbol_file_add or not? According to | |
1315 | a comment from remote-mips.c (where a call to symbol_file_add was | |
1316 | commented out), making the call confuses GDB if more than one file is | |
1317 | loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c | |
1318 | does. */ | |
1319 | ||
917317f4 JM |
1320 | print_transfer_performance (gdb_stdout, data_count, write_count, |
1321 | end_time - start_time); | |
c906108c SS |
1322 | |
1323 | do_cleanups (old_cleanups); | |
1324 | } | |
1325 | ||
1326 | /* Report how fast the transfer went. */ | |
1327 | ||
917317f4 JM |
1328 | /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being |
1329 | replaced by print_transfer_performance (with a very different | |
1330 | function signature). */ | |
1331 | ||
c906108c | 1332 | void |
fba45db2 KB |
1333 | report_transfer_performance (unsigned long data_count, time_t start_time, |
1334 | time_t end_time) | |
c906108c | 1335 | { |
917317f4 JM |
1336 | print_transfer_performance (gdb_stdout, data_count, end_time - start_time, 0); |
1337 | } | |
1338 | ||
1339 | void | |
d9fcf2fb | 1340 | print_transfer_performance (struct ui_file *stream, |
917317f4 JM |
1341 | unsigned long data_count, |
1342 | unsigned long write_count, | |
1343 | unsigned long time_count) | |
1344 | { | |
8b93c638 JM |
1345 | #ifdef UI_OUT |
1346 | ui_out_text (uiout, "Transfer rate: "); | |
1347 | if (time_count > 0) | |
1348 | { | |
1349 | ui_out_field_fmt (uiout, "transfer-rate", "%ld", | |
1350 | (data_count * 8) / time_count); | |
1351 | ui_out_text (uiout, " bits/sec"); | |
1352 | } | |
1353 | else | |
1354 | { | |
1355 | ui_out_field_fmt (uiout, "transferred-bits", "%ld", (data_count * 8)); | |
1356 | ui_out_text (uiout, " bits in <1 sec"); | |
1357 | } | |
1358 | if (write_count > 0) | |
1359 | { | |
1360 | ui_out_text (uiout, ", "); | |
1361 | ui_out_field_fmt (uiout, "write-rate", "%ld", data_count / write_count); | |
1362 | ui_out_text (uiout, " bytes/write"); | |
1363 | } | |
1364 | ui_out_text (uiout, ".\n"); | |
1365 | #else | |
917317f4 JM |
1366 | fprintf_unfiltered (stream, "Transfer rate: "); |
1367 | if (time_count > 0) | |
1368 | fprintf_unfiltered (stream, "%ld bits/sec", (data_count * 8) / time_count); | |
c906108c | 1369 | else |
917317f4 JM |
1370 | fprintf_unfiltered (stream, "%ld bits in <1 sec", (data_count * 8)); |
1371 | if (write_count > 0) | |
1372 | fprintf_unfiltered (stream, ", %ld bytes/write", data_count / write_count); | |
1373 | fprintf_unfiltered (stream, ".\n"); | |
8b93c638 | 1374 | #endif |
c906108c SS |
1375 | } |
1376 | ||
1377 | /* This function allows the addition of incrementally linked object files. | |
1378 | It does not modify any state in the target, only in the debugger. */ | |
db162d44 EZ |
1379 | /* Note: ezannoni 2000-04-13 This function/command used to have a |
1380 | special case syntax for the rombug target (Rombug is the boot | |
1381 | monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the | |
1382 | rombug case, the user doesn't need to supply a text address, | |
1383 | instead a call to target_link() (in target.c) would supply the | |
1384 | value to use. We are now discontinuing this type of ad hoc syntax. */ | |
c906108c SS |
1385 | |
1386 | /* ARGSUSED */ | |
1387 | static void | |
fba45db2 | 1388 | add_symbol_file_command (char *args, int from_tty) |
c906108c | 1389 | { |
db162d44 | 1390 | char *filename = NULL; |
2df3850c | 1391 | int flags = OBJF_USERLOADED; |
c906108c | 1392 | char *arg; |
2acceee2 | 1393 | int expecting_option = 0; |
db162d44 | 1394 | int section_index = 0; |
2acceee2 JM |
1395 | int argcnt = 0; |
1396 | int sec_num = 0; | |
1397 | int i; | |
db162d44 EZ |
1398 | int expecting_sec_name = 0; |
1399 | int expecting_sec_addr = 0; | |
1400 | ||
2acceee2 JM |
1401 | struct |
1402 | { | |
2acceee2 JM |
1403 | char *name; |
1404 | char *value; | |
db162d44 EZ |
1405 | } sect_opts[SECT_OFF_MAX]; |
1406 | ||
2acceee2 | 1407 | struct section_addr_info section_addrs; |
db162d44 | 1408 | struct cleanup *my_cleanups; |
c5aa993b | 1409 | |
c906108c SS |
1410 | dont_repeat (); |
1411 | ||
1412 | if (args == NULL) | |
db162d44 | 1413 | error ("add-symbol-file takes a file name and an address"); |
c906108c SS |
1414 | |
1415 | /* Make a copy of the string that we can safely write into. */ | |
c2d11a7d | 1416 | args = xstrdup (args); |
c906108c | 1417 | |
2acceee2 JM |
1418 | /* Ensure section_addrs is initialized */ |
1419 | memset (§ion_addrs, 0, sizeof (section_addrs)); | |
1420 | ||
2acceee2 | 1421 | while (*args != '\000') |
c906108c | 1422 | { |
db162d44 | 1423 | /* Any leading spaces? */ |
c5aa993b | 1424 | while (isspace (*args)) |
db162d44 EZ |
1425 | args++; |
1426 | ||
1427 | /* Point arg to the beginning of the argument. */ | |
c906108c | 1428 | arg = args; |
db162d44 EZ |
1429 | |
1430 | /* Move args pointer over the argument. */ | |
c5aa993b | 1431 | while ((*args != '\000') && !isspace (*args)) |
db162d44 EZ |
1432 | args++; |
1433 | ||
1434 | /* If there are more arguments, terminate arg and | |
1435 | proceed past it. */ | |
c906108c | 1436 | if (*args != '\000') |
db162d44 EZ |
1437 | *args++ = '\000'; |
1438 | ||
1439 | /* Now process the argument. */ | |
1440 | if (argcnt == 0) | |
c906108c | 1441 | { |
db162d44 EZ |
1442 | /* The first argument is the file name. */ |
1443 | filename = tilde_expand (arg); | |
b8c9b27d | 1444 | my_cleanups = make_cleanup (xfree, filename); |
c906108c | 1445 | } |
db162d44 | 1446 | else |
7a78ae4e ND |
1447 | if (argcnt == 1) |
1448 | { | |
1449 | /* The second argument is always the text address at which | |
1450 | to load the program. */ | |
1451 | sect_opts[section_index].name = ".text"; | |
1452 | sect_opts[section_index].value = arg; | |
1453 | section_index++; | |
1454 | } | |
1455 | else | |
1456 | { | |
1457 | /* It's an option (starting with '-') or it's an argument | |
1458 | to an option */ | |
1459 | ||
1460 | if (*arg == '-') | |
1461 | { | |
1462 | if (strcmp (arg, "-mapped") == 0) | |
1463 | flags |= OBJF_MAPPED; | |
1464 | else | |
1465 | if (strcmp (arg, "-readnow") == 0) | |
1466 | flags |= OBJF_READNOW; | |
1467 | else | |
1468 | if (strcmp (arg, "-s") == 0) | |
1469 | { | |
1470 | if (section_index >= SECT_OFF_MAX) | |
1471 | error ("Too many sections specified."); | |
1472 | expecting_sec_name = 1; | |
1473 | expecting_sec_addr = 1; | |
1474 | } | |
1475 | } | |
1476 | else | |
1477 | { | |
1478 | if (expecting_sec_name) | |
db162d44 | 1479 | { |
7a78ae4e ND |
1480 | sect_opts[section_index].name = arg; |
1481 | expecting_sec_name = 0; | |
db162d44 EZ |
1482 | } |
1483 | else | |
7a78ae4e ND |
1484 | if (expecting_sec_addr) |
1485 | { | |
1486 | sect_opts[section_index].value = arg; | |
1487 | expecting_sec_addr = 0; | |
1488 | section_index++; | |
1489 | } | |
1490 | else | |
1491 | error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*"); | |
1492 | } | |
1493 | } | |
db162d44 | 1494 | argcnt++; |
c906108c | 1495 | } |
c906108c | 1496 | |
db162d44 EZ |
1497 | /* Print the prompt for the query below. And save the arguments into |
1498 | a sect_addr_info structure to be passed around to other | |
1499 | functions. We have to split this up into separate print | |
1500 | statements because local_hex_string returns a local static | |
1501 | string. */ | |
2acceee2 | 1502 | |
db162d44 EZ |
1503 | printf_filtered ("add symbol table from file \"%s\" at\n", filename); |
1504 | for (i = 0; i < section_index; i++) | |
c906108c | 1505 | { |
db162d44 EZ |
1506 | CORE_ADDR addr; |
1507 | char *val = sect_opts[i].value; | |
1508 | char *sec = sect_opts[i].name; | |
1509 | ||
1510 | val = sect_opts[i].value; | |
1511 | if (val[0] == '0' && val[1] == 'x') | |
1512 | addr = strtoul (val+2, NULL, 16); | |
1513 | else | |
1514 | addr = strtoul (val, NULL, 10); | |
1515 | ||
db162d44 EZ |
1516 | /* Here we store the section offsets in the order they were |
1517 | entered on the command line. */ | |
1518 | section_addrs.other[sec_num].name = sec; | |
1519 | section_addrs.other[sec_num].addr = addr; | |
1520 | printf_filtered ("\t%s_addr = %s\n", | |
1521 | sec, | |
1522 | local_hex_string ((unsigned long)addr)); | |
1523 | sec_num++; | |
1524 | ||
1525 | /* The object's sections are initialized when a | |
1526 | call is made to build_objfile_section_table (objfile). | |
1527 | This happens in reread_symbols. | |
1528 | At this point, we don't know what file type this is, | |
1529 | so we can't determine what section names are valid. */ | |
2acceee2 | 1530 | } |
db162d44 | 1531 | |
2acceee2 | 1532 | if (from_tty && (!query ("%s", ""))) |
c906108c SS |
1533 | error ("Not confirmed."); |
1534 | ||
db162d44 | 1535 | symbol_file_add (filename, from_tty, §ion_addrs, 0, flags); |
c906108c SS |
1536 | |
1537 | /* Getting new symbols may change our opinion about what is | |
1538 | frameless. */ | |
1539 | reinit_frame_cache (); | |
db162d44 | 1540 | do_cleanups (my_cleanups); |
c906108c SS |
1541 | } |
1542 | \f | |
1543 | static void | |
fba45db2 | 1544 | add_shared_symbol_files_command (char *args, int from_tty) |
c906108c SS |
1545 | { |
1546 | #ifdef ADD_SHARED_SYMBOL_FILES | |
1547 | ADD_SHARED_SYMBOL_FILES (args, from_tty); | |
1548 | #else | |
1549 | error ("This command is not available in this configuration of GDB."); | |
c5aa993b | 1550 | #endif |
c906108c SS |
1551 | } |
1552 | \f | |
1553 | /* Re-read symbols if a symbol-file has changed. */ | |
1554 | void | |
fba45db2 | 1555 | reread_symbols (void) |
c906108c SS |
1556 | { |
1557 | struct objfile *objfile; | |
1558 | long new_modtime; | |
1559 | int reread_one = 0; | |
1560 | struct stat new_statbuf; | |
1561 | int res; | |
1562 | ||
1563 | /* With the addition of shared libraries, this should be modified, | |
1564 | the load time should be saved in the partial symbol tables, since | |
1565 | different tables may come from different source files. FIXME. | |
1566 | This routine should then walk down each partial symbol table | |
1567 | and see if the symbol table that it originates from has been changed */ | |
1568 | ||
c5aa993b JM |
1569 | for (objfile = object_files; objfile; objfile = objfile->next) |
1570 | { | |
1571 | if (objfile->obfd) | |
1572 | { | |
c906108c | 1573 | #ifdef IBM6000_TARGET |
c5aa993b JM |
1574 | /* If this object is from a shared library, then you should |
1575 | stat on the library name, not member name. */ | |
c906108c | 1576 | |
c5aa993b JM |
1577 | if (objfile->obfd->my_archive) |
1578 | res = stat (objfile->obfd->my_archive->filename, &new_statbuf); | |
1579 | else | |
c906108c | 1580 | #endif |
c5aa993b JM |
1581 | res = stat (objfile->name, &new_statbuf); |
1582 | if (res != 0) | |
c906108c | 1583 | { |
c5aa993b JM |
1584 | /* FIXME, should use print_sys_errmsg but it's not filtered. */ |
1585 | printf_filtered ("`%s' has disappeared; keeping its symbols.\n", | |
1586 | objfile->name); | |
1587 | continue; | |
c906108c | 1588 | } |
c5aa993b JM |
1589 | new_modtime = new_statbuf.st_mtime; |
1590 | if (new_modtime != objfile->mtime) | |
c906108c | 1591 | { |
c5aa993b JM |
1592 | struct cleanup *old_cleanups; |
1593 | struct section_offsets *offsets; | |
1594 | int num_offsets; | |
c5aa993b JM |
1595 | char *obfd_filename; |
1596 | ||
1597 | printf_filtered ("`%s' has changed; re-reading symbols.\n", | |
1598 | objfile->name); | |
1599 | ||
1600 | /* There are various functions like symbol_file_add, | |
1601 | symfile_bfd_open, syms_from_objfile, etc., which might | |
1602 | appear to do what we want. But they have various other | |
1603 | effects which we *don't* want. So we just do stuff | |
1604 | ourselves. We don't worry about mapped files (for one thing, | |
1605 | any mapped file will be out of date). */ | |
1606 | ||
1607 | /* If we get an error, blow away this objfile (not sure if | |
1608 | that is the correct response for things like shared | |
1609 | libraries). */ | |
74b7792f | 1610 | old_cleanups = make_cleanup_free_objfile (objfile); |
c5aa993b | 1611 | /* We need to do this whenever any symbols go away. */ |
74b7792f | 1612 | make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/); |
c5aa993b JM |
1613 | |
1614 | /* Clean up any state BFD has sitting around. We don't need | |
1615 | to close the descriptor but BFD lacks a way of closing the | |
1616 | BFD without closing the descriptor. */ | |
1617 | obfd_filename = bfd_get_filename (objfile->obfd); | |
1618 | if (!bfd_close (objfile->obfd)) | |
1619 | error ("Can't close BFD for %s: %s", objfile->name, | |
1620 | bfd_errmsg (bfd_get_error ())); | |
1621 | objfile->obfd = bfd_openr (obfd_filename, gnutarget); | |
1622 | if (objfile->obfd == NULL) | |
1623 | error ("Can't open %s to read symbols.", objfile->name); | |
1624 | /* bfd_openr sets cacheable to true, which is what we want. */ | |
1625 | if (!bfd_check_format (objfile->obfd, bfd_object)) | |
1626 | error ("Can't read symbols from %s: %s.", objfile->name, | |
1627 | bfd_errmsg (bfd_get_error ())); | |
1628 | ||
1629 | /* Save the offsets, we will nuke them with the rest of the | |
1630 | psymbol_obstack. */ | |
1631 | num_offsets = objfile->num_sections; | |
d4f3574e SS |
1632 | offsets = (struct section_offsets *) alloca (SIZEOF_SECTION_OFFSETS); |
1633 | memcpy (offsets, objfile->section_offsets, SIZEOF_SECTION_OFFSETS); | |
c5aa993b JM |
1634 | |
1635 | /* Nuke all the state that we will re-read. Much of the following | |
1636 | code which sets things to NULL really is necessary to tell | |
1637 | other parts of GDB that there is nothing currently there. */ | |
1638 | ||
1639 | /* FIXME: Do we have to free a whole linked list, or is this | |
1640 | enough? */ | |
1641 | if (objfile->global_psymbols.list) | |
1642 | mfree (objfile->md, objfile->global_psymbols.list); | |
1643 | memset (&objfile->global_psymbols, 0, | |
1644 | sizeof (objfile->global_psymbols)); | |
1645 | if (objfile->static_psymbols.list) | |
1646 | mfree (objfile->md, objfile->static_psymbols.list); | |
1647 | memset (&objfile->static_psymbols, 0, | |
1648 | sizeof (objfile->static_psymbols)); | |
1649 | ||
1650 | /* Free the obstacks for non-reusable objfiles */ | |
c2d11a7d | 1651 | free_bcache (&objfile->psymbol_cache); |
c5aa993b JM |
1652 | obstack_free (&objfile->psymbol_obstack, 0); |
1653 | obstack_free (&objfile->symbol_obstack, 0); | |
1654 | obstack_free (&objfile->type_obstack, 0); | |
1655 | objfile->sections = NULL; | |
1656 | objfile->symtabs = NULL; | |
1657 | objfile->psymtabs = NULL; | |
1658 | objfile->free_psymtabs = NULL; | |
1659 | objfile->msymbols = NULL; | |
1660 | objfile->minimal_symbol_count = 0; | |
0a83117a MS |
1661 | memset (&objfile->msymbol_hash, 0, |
1662 | sizeof (objfile->msymbol_hash)); | |
1663 | memset (&objfile->msymbol_demangled_hash, 0, | |
1664 | sizeof (objfile->msymbol_demangled_hash)); | |
c5aa993b JM |
1665 | objfile->fundamental_types = NULL; |
1666 | if (objfile->sf != NULL) | |
1667 | { | |
1668 | (*objfile->sf->sym_finish) (objfile); | |
1669 | } | |
1670 | ||
1671 | /* We never make this a mapped file. */ | |
1672 | objfile->md = NULL; | |
1673 | /* obstack_specify_allocation also initializes the obstack so | |
1674 | it is empty. */ | |
1675 | obstack_specify_allocation (&objfile->psymbol_cache.cache, 0, 0, | |
b8c9b27d | 1676 | xmalloc, xfree); |
c5aa993b | 1677 | obstack_specify_allocation (&objfile->psymbol_obstack, 0, 0, |
b8c9b27d | 1678 | xmalloc, xfree); |
c5aa993b | 1679 | obstack_specify_allocation (&objfile->symbol_obstack, 0, 0, |
b8c9b27d | 1680 | xmalloc, xfree); |
c5aa993b | 1681 | obstack_specify_allocation (&objfile->type_obstack, 0, 0, |
b8c9b27d | 1682 | xmalloc, xfree); |
c5aa993b JM |
1683 | if (build_objfile_section_table (objfile)) |
1684 | { | |
1685 | error ("Can't find the file sections in `%s': %s", | |
1686 | objfile->name, bfd_errmsg (bfd_get_error ())); | |
1687 | } | |
1688 | ||
1689 | /* We use the same section offsets as from last time. I'm not | |
1690 | sure whether that is always correct for shared libraries. */ | |
1691 | objfile->section_offsets = (struct section_offsets *) | |
d4f3574e SS |
1692 | obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS); |
1693 | memcpy (objfile->section_offsets, offsets, SIZEOF_SECTION_OFFSETS); | |
c5aa993b JM |
1694 | objfile->num_sections = num_offsets; |
1695 | ||
1696 | /* What the hell is sym_new_init for, anyway? The concept of | |
1697 | distinguishing between the main file and additional files | |
1698 | in this way seems rather dubious. */ | |
1699 | if (objfile == symfile_objfile) | |
1700 | { | |
1701 | (*objfile->sf->sym_new_init) (objfile); | |
c906108c | 1702 | #ifdef HPUXHPPA |
c5aa993b | 1703 | RESET_HP_UX_GLOBALS (); |
c906108c | 1704 | #endif |
c5aa993b JM |
1705 | } |
1706 | ||
1707 | (*objfile->sf->sym_init) (objfile); | |
1708 | clear_complaints (1, 1); | |
1709 | /* The "mainline" parameter is a hideous hack; I think leaving it | |
1710 | zero is OK since dbxread.c also does what it needs to do if | |
1711 | objfile->global_psymbols.size is 0. */ | |
96baa820 | 1712 | (*objfile->sf->sym_read) (objfile, 0); |
c5aa993b JM |
1713 | if (!have_partial_symbols () && !have_full_symbols ()) |
1714 | { | |
1715 | wrap_here (""); | |
1716 | printf_filtered ("(no debugging symbols found)\n"); | |
1717 | wrap_here (""); | |
1718 | } | |
1719 | objfile->flags |= OBJF_SYMS; | |
1720 | ||
1721 | /* We're done reading the symbol file; finish off complaints. */ | |
1722 | clear_complaints (0, 1); | |
c906108c | 1723 | |
c5aa993b JM |
1724 | /* Getting new symbols may change our opinion about what is |
1725 | frameless. */ | |
c906108c | 1726 | |
c5aa993b | 1727 | reinit_frame_cache (); |
c906108c | 1728 | |
c5aa993b JM |
1729 | /* Discard cleanups as symbol reading was successful. */ |
1730 | discard_cleanups (old_cleanups); | |
c906108c | 1731 | |
c5aa993b JM |
1732 | /* If the mtime has changed between the time we set new_modtime |
1733 | and now, we *want* this to be out of date, so don't call stat | |
1734 | again now. */ | |
1735 | objfile->mtime = new_modtime; | |
1736 | reread_one = 1; | |
c906108c | 1737 | |
c5aa993b | 1738 | /* Call this after reading in a new symbol table to give target |
38c2ef12 | 1739 | dependent code a crack at the new symbols. For instance, this |
c5aa993b JM |
1740 | could be used to update the values of target-specific symbols GDB |
1741 | needs to keep track of (such as _sigtramp, or whatever). */ | |
c906108c | 1742 | |
c5aa993b JM |
1743 | TARGET_SYMFILE_POSTREAD (objfile); |
1744 | } | |
c906108c SS |
1745 | } |
1746 | } | |
c906108c SS |
1747 | |
1748 | if (reread_one) | |
1749 | clear_symtab_users (); | |
1750 | } | |
c906108c SS |
1751 | \f |
1752 | ||
c5aa993b JM |
1753 | |
1754 | typedef struct | |
1755 | { | |
1756 | char *ext; | |
c906108c | 1757 | enum language lang; |
c5aa993b JM |
1758 | } |
1759 | filename_language; | |
c906108c | 1760 | |
c5aa993b | 1761 | static filename_language *filename_language_table; |
c906108c SS |
1762 | static int fl_table_size, fl_table_next; |
1763 | ||
1764 | static void | |
fba45db2 | 1765 | add_filename_language (char *ext, enum language lang) |
c906108c SS |
1766 | { |
1767 | if (fl_table_next >= fl_table_size) | |
1768 | { | |
1769 | fl_table_size += 10; | |
c5aa993b | 1770 | filename_language_table = realloc (filename_language_table, |
c906108c SS |
1771 | fl_table_size); |
1772 | } | |
1773 | ||
c5aa993b | 1774 | filename_language_table[fl_table_next].ext = strsave (ext); |
c906108c SS |
1775 | filename_language_table[fl_table_next].lang = lang; |
1776 | fl_table_next++; | |
1777 | } | |
1778 | ||
1779 | static char *ext_args; | |
1780 | ||
1781 | static void | |
fba45db2 | 1782 | set_ext_lang_command (char *args, int from_tty) |
c906108c SS |
1783 | { |
1784 | int i; | |
1785 | char *cp = ext_args; | |
1786 | enum language lang; | |
1787 | ||
1788 | /* First arg is filename extension, starting with '.' */ | |
1789 | if (*cp != '.') | |
1790 | error ("'%s': Filename extension must begin with '.'", ext_args); | |
1791 | ||
1792 | /* Find end of first arg. */ | |
c5aa993b | 1793 | while (*cp && !isspace (*cp)) |
c906108c SS |
1794 | cp++; |
1795 | ||
1796 | if (*cp == '\0') | |
1797 | error ("'%s': two arguments required -- filename extension and language", | |
1798 | ext_args); | |
1799 | ||
1800 | /* Null-terminate first arg */ | |
c5aa993b | 1801 | *cp++ = '\0'; |
c906108c SS |
1802 | |
1803 | /* Find beginning of second arg, which should be a source language. */ | |
1804 | while (*cp && isspace (*cp)) | |
1805 | cp++; | |
1806 | ||
1807 | if (*cp == '\0') | |
1808 | error ("'%s': two arguments required -- filename extension and language", | |
1809 | ext_args); | |
1810 | ||
1811 | /* Lookup the language from among those we know. */ | |
1812 | lang = language_enum (cp); | |
1813 | ||
1814 | /* Now lookup the filename extension: do we already know it? */ | |
1815 | for (i = 0; i < fl_table_next; i++) | |
1816 | if (0 == strcmp (ext_args, filename_language_table[i].ext)) | |
1817 | break; | |
1818 | ||
1819 | if (i >= fl_table_next) | |
1820 | { | |
1821 | /* new file extension */ | |
1822 | add_filename_language (ext_args, lang); | |
1823 | } | |
1824 | else | |
1825 | { | |
1826 | /* redefining a previously known filename extension */ | |
1827 | ||
1828 | /* if (from_tty) */ | |
1829 | /* query ("Really make files of type %s '%s'?", */ | |
1830 | /* ext_args, language_str (lang)); */ | |
1831 | ||
b8c9b27d | 1832 | xfree (filename_language_table[i].ext); |
c5aa993b | 1833 | filename_language_table[i].ext = strsave (ext_args); |
c906108c SS |
1834 | filename_language_table[i].lang = lang; |
1835 | } | |
1836 | } | |
1837 | ||
1838 | static void | |
fba45db2 | 1839 | info_ext_lang_command (char *args, int from_tty) |
c906108c SS |
1840 | { |
1841 | int i; | |
1842 | ||
1843 | printf_filtered ("Filename extensions and the languages they represent:"); | |
1844 | printf_filtered ("\n\n"); | |
1845 | for (i = 0; i < fl_table_next; i++) | |
c5aa993b JM |
1846 | printf_filtered ("\t%s\t- %s\n", |
1847 | filename_language_table[i].ext, | |
c906108c SS |
1848 | language_str (filename_language_table[i].lang)); |
1849 | } | |
1850 | ||
1851 | static void | |
fba45db2 | 1852 | init_filename_language_table (void) |
c906108c SS |
1853 | { |
1854 | if (fl_table_size == 0) /* protect against repetition */ | |
1855 | { | |
1856 | fl_table_size = 20; | |
1857 | fl_table_next = 0; | |
c5aa993b | 1858 | filename_language_table = |
c906108c | 1859 | xmalloc (fl_table_size * sizeof (*filename_language_table)); |
c5aa993b JM |
1860 | add_filename_language (".c", language_c); |
1861 | add_filename_language (".C", language_cplus); | |
1862 | add_filename_language (".cc", language_cplus); | |
1863 | add_filename_language (".cp", language_cplus); | |
1864 | add_filename_language (".cpp", language_cplus); | |
1865 | add_filename_language (".cxx", language_cplus); | |
1866 | add_filename_language (".c++", language_cplus); | |
1867 | add_filename_language (".java", language_java); | |
c906108c | 1868 | add_filename_language (".class", language_java); |
c5aa993b JM |
1869 | add_filename_language (".ch", language_chill); |
1870 | add_filename_language (".c186", language_chill); | |
1871 | add_filename_language (".c286", language_chill); | |
1872 | add_filename_language (".f", language_fortran); | |
1873 | add_filename_language (".F", language_fortran); | |
1874 | add_filename_language (".s", language_asm); | |
1875 | add_filename_language (".S", language_asm); | |
c6fd39cd PM |
1876 | add_filename_language (".pas", language_pascal); |
1877 | add_filename_language (".p", language_pascal); | |
1878 | add_filename_language (".pp", language_pascal); | |
c906108c SS |
1879 | } |
1880 | } | |
1881 | ||
1882 | enum language | |
fba45db2 | 1883 | deduce_language_from_filename (char *filename) |
c906108c SS |
1884 | { |
1885 | int i; | |
1886 | char *cp; | |
1887 | ||
1888 | if (filename != NULL) | |
1889 | if ((cp = strrchr (filename, '.')) != NULL) | |
1890 | for (i = 0; i < fl_table_next; i++) | |
1891 | if (strcmp (cp, filename_language_table[i].ext) == 0) | |
1892 | return filename_language_table[i].lang; | |
1893 | ||
1894 | return language_unknown; | |
1895 | } | |
1896 | \f | |
1897 | /* allocate_symtab: | |
1898 | ||
1899 | Allocate and partly initialize a new symbol table. Return a pointer | |
1900 | to it. error() if no space. | |
1901 | ||
1902 | Caller must set these fields: | |
c5aa993b JM |
1903 | LINETABLE(symtab) |
1904 | symtab->blockvector | |
1905 | symtab->dirname | |
1906 | symtab->free_code | |
1907 | symtab->free_ptr | |
1908 | possibly free_named_symtabs (symtab->filename); | |
c906108c SS |
1909 | */ |
1910 | ||
1911 | struct symtab * | |
fba45db2 | 1912 | allocate_symtab (char *filename, struct objfile *objfile) |
c906108c SS |
1913 | { |
1914 | register struct symtab *symtab; | |
1915 | ||
1916 | symtab = (struct symtab *) | |
c5aa993b | 1917 | obstack_alloc (&objfile->symbol_obstack, sizeof (struct symtab)); |
c906108c | 1918 | memset (symtab, 0, sizeof (*symtab)); |
c5aa993b JM |
1919 | symtab->filename = obsavestring (filename, strlen (filename), |
1920 | &objfile->symbol_obstack); | |
1921 | symtab->fullname = NULL; | |
1922 | symtab->language = deduce_language_from_filename (filename); | |
1923 | symtab->debugformat = obsavestring ("unknown", 7, | |
1924 | &objfile->symbol_obstack); | |
c906108c SS |
1925 | |
1926 | /* Hook it to the objfile it comes from */ | |
1927 | ||
c5aa993b JM |
1928 | symtab->objfile = objfile; |
1929 | symtab->next = objfile->symtabs; | |
1930 | objfile->symtabs = symtab; | |
c906108c SS |
1931 | |
1932 | /* FIXME: This should go away. It is only defined for the Z8000, | |
1933 | and the Z8000 definition of this macro doesn't have anything to | |
1934 | do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just | |
1935 | here for convenience. */ | |
1936 | #ifdef INIT_EXTRA_SYMTAB_INFO | |
1937 | INIT_EXTRA_SYMTAB_INFO (symtab); | |
1938 | #endif | |
1939 | ||
1940 | return (symtab); | |
1941 | } | |
1942 | ||
1943 | struct partial_symtab * | |
fba45db2 | 1944 | allocate_psymtab (char *filename, struct objfile *objfile) |
c906108c SS |
1945 | { |
1946 | struct partial_symtab *psymtab; | |
1947 | ||
c5aa993b | 1948 | if (objfile->free_psymtabs) |
c906108c | 1949 | { |
c5aa993b JM |
1950 | psymtab = objfile->free_psymtabs; |
1951 | objfile->free_psymtabs = psymtab->next; | |
c906108c SS |
1952 | } |
1953 | else | |
1954 | psymtab = (struct partial_symtab *) | |
c5aa993b | 1955 | obstack_alloc (&objfile->psymbol_obstack, |
c906108c SS |
1956 | sizeof (struct partial_symtab)); |
1957 | ||
1958 | memset (psymtab, 0, sizeof (struct partial_symtab)); | |
c5aa993b JM |
1959 | psymtab->filename = obsavestring (filename, strlen (filename), |
1960 | &objfile->psymbol_obstack); | |
1961 | psymtab->symtab = NULL; | |
c906108c SS |
1962 | |
1963 | /* Prepend it to the psymtab list for the objfile it belongs to. | |
1964 | Psymtabs are searched in most recent inserted -> least recent | |
1965 | inserted order. */ | |
1966 | ||
c5aa993b JM |
1967 | psymtab->objfile = objfile; |
1968 | psymtab->next = objfile->psymtabs; | |
1969 | objfile->psymtabs = psymtab; | |
c906108c SS |
1970 | #if 0 |
1971 | { | |
1972 | struct partial_symtab **prev_pst; | |
c5aa993b JM |
1973 | psymtab->objfile = objfile; |
1974 | psymtab->next = NULL; | |
1975 | prev_pst = &(objfile->psymtabs); | |
c906108c | 1976 | while ((*prev_pst) != NULL) |
c5aa993b | 1977 | prev_pst = &((*prev_pst)->next); |
c906108c | 1978 | (*prev_pst) = psymtab; |
c5aa993b | 1979 | } |
c906108c | 1980 | #endif |
c5aa993b | 1981 | |
c906108c SS |
1982 | return (psymtab); |
1983 | } | |
1984 | ||
1985 | void | |
fba45db2 | 1986 | discard_psymtab (struct partial_symtab *pst) |
c906108c SS |
1987 | { |
1988 | struct partial_symtab **prev_pst; | |
1989 | ||
1990 | /* From dbxread.c: | |
1991 | Empty psymtabs happen as a result of header files which don't | |
1992 | have any symbols in them. There can be a lot of them. But this | |
1993 | check is wrong, in that a psymtab with N_SLINE entries but | |
1994 | nothing else is not empty, but we don't realize that. Fixing | |
1995 | that without slowing things down might be tricky. */ | |
1996 | ||
1997 | /* First, snip it out of the psymtab chain */ | |
1998 | ||
1999 | prev_pst = &(pst->objfile->psymtabs); | |
2000 | while ((*prev_pst) != pst) | |
2001 | prev_pst = &((*prev_pst)->next); | |
2002 | (*prev_pst) = pst->next; | |
2003 | ||
2004 | /* Next, put it on a free list for recycling */ | |
2005 | ||
2006 | pst->next = pst->objfile->free_psymtabs; | |
2007 | pst->objfile->free_psymtabs = pst; | |
2008 | } | |
c906108c | 2009 | \f |
c5aa993b | 2010 | |
c906108c SS |
2011 | /* Reset all data structures in gdb which may contain references to symbol |
2012 | table data. */ | |
2013 | ||
2014 | void | |
fba45db2 | 2015 | clear_symtab_users (void) |
c906108c SS |
2016 | { |
2017 | /* Someday, we should do better than this, by only blowing away | |
2018 | the things that really need to be blown. */ | |
2019 | clear_value_history (); | |
2020 | clear_displays (); | |
2021 | clear_internalvars (); | |
2022 | breakpoint_re_set (); | |
2023 | set_default_breakpoint (0, 0, 0, 0); | |
2024 | current_source_symtab = 0; | |
2025 | current_source_line = 0; | |
2026 | clear_pc_function_cache (); | |
11cf8741 JM |
2027 | if (target_new_objfile_hook) |
2028 | target_new_objfile_hook (NULL); | |
c906108c SS |
2029 | } |
2030 | ||
74b7792f AC |
2031 | static void |
2032 | clear_symtab_users_cleanup (void *ignore) | |
2033 | { | |
2034 | clear_symtab_users (); | |
2035 | } | |
2036 | ||
c906108c SS |
2037 | /* clear_symtab_users_once: |
2038 | ||
2039 | This function is run after symbol reading, or from a cleanup. | |
2040 | If an old symbol table was obsoleted, the old symbol table | |
2041 | has been blown away, but the other GDB data structures that may | |
2042 | reference it have not yet been cleared or re-directed. (The old | |
2043 | symtab was zapped, and the cleanup queued, in free_named_symtab() | |
2044 | below.) | |
2045 | ||
2046 | This function can be queued N times as a cleanup, or called | |
2047 | directly; it will do all the work the first time, and then will be a | |
2048 | no-op until the next time it is queued. This works by bumping a | |
2049 | counter at queueing time. Much later when the cleanup is run, or at | |
2050 | the end of symbol processing (in case the cleanup is discarded), if | |
2051 | the queued count is greater than the "done-count", we do the work | |
2052 | and set the done-count to the queued count. If the queued count is | |
2053 | less than or equal to the done-count, we just ignore the call. This | |
2054 | is needed because reading a single .o file will often replace many | |
2055 | symtabs (one per .h file, for example), and we don't want to reset | |
2056 | the breakpoints N times in the user's face. | |
2057 | ||
2058 | The reason we both queue a cleanup, and call it directly after symbol | |
2059 | reading, is because the cleanup protects us in case of errors, but is | |
2060 | discarded if symbol reading is successful. */ | |
2061 | ||
2062 | #if 0 | |
2063 | /* FIXME: As free_named_symtabs is currently a big noop this function | |
2064 | is no longer needed. */ | |
a14ed312 | 2065 | static void clear_symtab_users_once (void); |
c906108c SS |
2066 | |
2067 | static int clear_symtab_users_queued; | |
2068 | static int clear_symtab_users_done; | |
2069 | ||
2070 | static void | |
fba45db2 | 2071 | clear_symtab_users_once (void) |
c906108c SS |
2072 | { |
2073 | /* Enforce once-per-`do_cleanups'-semantics */ | |
2074 | if (clear_symtab_users_queued <= clear_symtab_users_done) | |
2075 | return; | |
2076 | clear_symtab_users_done = clear_symtab_users_queued; | |
2077 | ||
2078 | clear_symtab_users (); | |
2079 | } | |
2080 | #endif | |
2081 | ||
2082 | /* Delete the specified psymtab, and any others that reference it. */ | |
2083 | ||
2084 | static void | |
fba45db2 | 2085 | cashier_psymtab (struct partial_symtab *pst) |
c906108c SS |
2086 | { |
2087 | struct partial_symtab *ps, *pprev = NULL; | |
2088 | int i; | |
2089 | ||
2090 | /* Find its previous psymtab in the chain */ | |
c5aa993b JM |
2091 | for (ps = pst->objfile->psymtabs; ps; ps = ps->next) |
2092 | { | |
2093 | if (ps == pst) | |
2094 | break; | |
2095 | pprev = ps; | |
2096 | } | |
c906108c | 2097 | |
c5aa993b JM |
2098 | if (ps) |
2099 | { | |
2100 | /* Unhook it from the chain. */ | |
2101 | if (ps == pst->objfile->psymtabs) | |
2102 | pst->objfile->psymtabs = ps->next; | |
2103 | else | |
2104 | pprev->next = ps->next; | |
2105 | ||
2106 | /* FIXME, we can't conveniently deallocate the entries in the | |
2107 | partial_symbol lists (global_psymbols/static_psymbols) that | |
2108 | this psymtab points to. These just take up space until all | |
2109 | the psymtabs are reclaimed. Ditto the dependencies list and | |
2110 | filename, which are all in the psymbol_obstack. */ | |
2111 | ||
2112 | /* We need to cashier any psymtab that has this one as a dependency... */ | |
2113 | again: | |
2114 | for (ps = pst->objfile->psymtabs; ps; ps = ps->next) | |
2115 | { | |
2116 | for (i = 0; i < ps->number_of_dependencies; i++) | |
2117 | { | |
2118 | if (ps->dependencies[i] == pst) | |
2119 | { | |
2120 | cashier_psymtab (ps); | |
2121 | goto again; /* Must restart, chain has been munged. */ | |
2122 | } | |
2123 | } | |
c906108c | 2124 | } |
c906108c | 2125 | } |
c906108c SS |
2126 | } |
2127 | ||
2128 | /* If a symtab or psymtab for filename NAME is found, free it along | |
2129 | with any dependent breakpoints, displays, etc. | |
2130 | Used when loading new versions of object modules with the "add-file" | |
2131 | command. This is only called on the top-level symtab or psymtab's name; | |
2132 | it is not called for subsidiary files such as .h files. | |
2133 | ||
2134 | Return value is 1 if we blew away the environment, 0 if not. | |
7e73cedf | 2135 | FIXME. The return value appears to never be used. |
c906108c SS |
2136 | |
2137 | FIXME. I think this is not the best way to do this. We should | |
2138 | work on being gentler to the environment while still cleaning up | |
2139 | all stray pointers into the freed symtab. */ | |
2140 | ||
2141 | int | |
fba45db2 | 2142 | free_named_symtabs (char *name) |
c906108c SS |
2143 | { |
2144 | #if 0 | |
2145 | /* FIXME: With the new method of each objfile having it's own | |
2146 | psymtab list, this function needs serious rethinking. In particular, | |
2147 | why was it ever necessary to toss psymtabs with specific compilation | |
2148 | unit filenames, as opposed to all psymtabs from a particular symbol | |
2149 | file? -- fnf | |
2150 | Well, the answer is that some systems permit reloading of particular | |
2151 | compilation units. We want to blow away any old info about these | |
2152 | compilation units, regardless of which objfiles they arrived in. --gnu. */ | |
2153 | ||
2154 | register struct symtab *s; | |
2155 | register struct symtab *prev; | |
2156 | register struct partial_symtab *ps; | |
2157 | struct blockvector *bv; | |
2158 | int blewit = 0; | |
2159 | ||
2160 | /* We only wack things if the symbol-reload switch is set. */ | |
2161 | if (!symbol_reloading) | |
2162 | return 0; | |
2163 | ||
2164 | /* Some symbol formats have trouble providing file names... */ | |
2165 | if (name == 0 || *name == '\0') | |
2166 | return 0; | |
2167 | ||
2168 | /* Look for a psymtab with the specified name. */ | |
2169 | ||
2170 | again2: | |
c5aa993b JM |
2171 | for (ps = partial_symtab_list; ps; ps = ps->next) |
2172 | { | |
2173 | if (STREQ (name, ps->filename)) | |
2174 | { | |
2175 | cashier_psymtab (ps); /* Blow it away...and its little dog, too. */ | |
2176 | goto again2; /* Must restart, chain has been munged */ | |
2177 | } | |
c906108c | 2178 | } |
c906108c SS |
2179 | |
2180 | /* Look for a symtab with the specified name. */ | |
2181 | ||
2182 | for (s = symtab_list; s; s = s->next) | |
2183 | { | |
2184 | if (STREQ (name, s->filename)) | |
2185 | break; | |
2186 | prev = s; | |
2187 | } | |
2188 | ||
2189 | if (s) | |
2190 | { | |
2191 | if (s == symtab_list) | |
2192 | symtab_list = s->next; | |
2193 | else | |
2194 | prev->next = s->next; | |
2195 | ||
2196 | /* For now, queue a delete for all breakpoints, displays, etc., whether | |
c5aa993b JM |
2197 | or not they depend on the symtab being freed. This should be |
2198 | changed so that only those data structures affected are deleted. */ | |
c906108c SS |
2199 | |
2200 | /* But don't delete anything if the symtab is empty. | |
c5aa993b JM |
2201 | This test is necessary due to a bug in "dbxread.c" that |
2202 | causes empty symtabs to be created for N_SO symbols that | |
2203 | contain the pathname of the object file. (This problem | |
2204 | has been fixed in GDB 3.9x). */ | |
c906108c SS |
2205 | |
2206 | bv = BLOCKVECTOR (s); | |
2207 | if (BLOCKVECTOR_NBLOCKS (bv) > 2 | |
2208 | || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) | |
2209 | || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK))) | |
2210 | { | |
2211 | complain (&oldsyms_complaint, name); | |
2212 | ||
2213 | clear_symtab_users_queued++; | |
2214 | make_cleanup (clear_symtab_users_once, 0); | |
2215 | blewit = 1; | |
c5aa993b JM |
2216 | } |
2217 | else | |
2218 | { | |
c906108c SS |
2219 | complain (&empty_symtab_complaint, name); |
2220 | } | |
2221 | ||
2222 | free_symtab (s); | |
2223 | } | |
2224 | else | |
2225 | { | |
2226 | /* It is still possible that some breakpoints will be affected | |
c5aa993b JM |
2227 | even though no symtab was found, since the file might have |
2228 | been compiled without debugging, and hence not be associated | |
2229 | with a symtab. In order to handle this correctly, we would need | |
2230 | to keep a list of text address ranges for undebuggable files. | |
2231 | For now, we do nothing, since this is a fairly obscure case. */ | |
c906108c SS |
2232 | ; |
2233 | } | |
2234 | ||
2235 | /* FIXME, what about the minimal symbol table? */ | |
2236 | return blewit; | |
2237 | #else | |
2238 | return (0); | |
2239 | #endif | |
2240 | } | |
2241 | \f | |
2242 | /* Allocate and partially fill a partial symtab. It will be | |
2243 | completely filled at the end of the symbol list. | |
2244 | ||
d4f3574e | 2245 | FILENAME is the name of the symbol-file we are reading from. */ |
c906108c SS |
2246 | |
2247 | struct partial_symtab * | |
fba45db2 KB |
2248 | start_psymtab_common (struct objfile *objfile, |
2249 | struct section_offsets *section_offsets, char *filename, | |
2250 | CORE_ADDR textlow, struct partial_symbol **global_syms, | |
2251 | struct partial_symbol **static_syms) | |
c906108c SS |
2252 | { |
2253 | struct partial_symtab *psymtab; | |
2254 | ||
2255 | psymtab = allocate_psymtab (filename, objfile); | |
c5aa993b JM |
2256 | psymtab->section_offsets = section_offsets; |
2257 | psymtab->textlow = textlow; | |
2258 | psymtab->texthigh = psymtab->textlow; /* default */ | |
2259 | psymtab->globals_offset = global_syms - objfile->global_psymbols.list; | |
2260 | psymtab->statics_offset = static_syms - objfile->static_psymbols.list; | |
c906108c SS |
2261 | return (psymtab); |
2262 | } | |
2263 | \f | |
2264 | /* Add a symbol with a long value to a psymtab. | |
2265 | Since one arg is a struct, we pass in a ptr and deref it (sigh). */ | |
2266 | ||
2267 | void | |
fba45db2 KB |
2268 | add_psymbol_to_list (char *name, int namelength, namespace_enum namespace, |
2269 | enum address_class class, | |
2270 | struct psymbol_allocation_list *list, long val, /* Value as a long */ | |
2271 | CORE_ADDR coreaddr, /* Value as a CORE_ADDR */ | |
2272 | enum language language, struct objfile *objfile) | |
c906108c SS |
2273 | { |
2274 | register struct partial_symbol *psym; | |
2275 | char *buf = alloca (namelength + 1); | |
2276 | /* psymbol is static so that there will be no uninitialized gaps in the | |
2277 | structure which might contain random data, causing cache misses in | |
2278 | bcache. */ | |
2279 | static struct partial_symbol psymbol; | |
2280 | ||
2281 | /* Create local copy of the partial symbol */ | |
2282 | memcpy (buf, name, namelength); | |
2283 | buf[namelength] = '\0'; | |
2284 | SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, &objfile->psymbol_cache); | |
2285 | /* val and coreaddr are mutually exclusive, one of them *will* be zero */ | |
2286 | if (val != 0) | |
2287 | { | |
2288 | SYMBOL_VALUE (&psymbol) = val; | |
2289 | } | |
2290 | else | |
2291 | { | |
2292 | SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr; | |
2293 | } | |
2294 | SYMBOL_SECTION (&psymbol) = 0; | |
2295 | SYMBOL_LANGUAGE (&psymbol) = language; | |
2296 | PSYMBOL_NAMESPACE (&psymbol) = namespace; | |
2297 | PSYMBOL_CLASS (&psymbol) = class; | |
2298 | SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language); | |
2299 | ||
2300 | /* Stash the partial symbol away in the cache */ | |
2301 | psym = bcache (&psymbol, sizeof (struct partial_symbol), &objfile->psymbol_cache); | |
2302 | ||
2303 | /* Save pointer to partial symbol in psymtab, growing symtab if needed. */ | |
2304 | if (list->next >= list->list + list->size) | |
2305 | { | |
2306 | extend_psymbol_list (list, objfile); | |
2307 | } | |
2308 | *list->next++ = psym; | |
2309 | OBJSTAT (objfile, n_psyms++); | |
2310 | } | |
2311 | ||
2312 | /* Add a symbol with a long value to a psymtab. This differs from | |
2313 | * add_psymbol_to_list above in taking both a mangled and a demangled | |
2314 | * name. */ | |
2315 | ||
2316 | void | |
fba45db2 KB |
2317 | add_psymbol_with_dem_name_to_list (char *name, int namelength, char *dem_name, |
2318 | int dem_namelength, namespace_enum namespace, | |
2319 | enum address_class class, | |
2320 | struct psymbol_allocation_list *list, long val, /* Value as a long */ | |
2321 | CORE_ADDR coreaddr, /* Value as a CORE_ADDR */ | |
2322 | enum language language, | |
2323 | struct objfile *objfile) | |
c906108c SS |
2324 | { |
2325 | register struct partial_symbol *psym; | |
2326 | char *buf = alloca (namelength + 1); | |
2327 | /* psymbol is static so that there will be no uninitialized gaps in the | |
2328 | structure which might contain random data, causing cache misses in | |
2329 | bcache. */ | |
2330 | static struct partial_symbol psymbol; | |
2331 | ||
2332 | /* Create local copy of the partial symbol */ | |
2333 | ||
2334 | memcpy (buf, name, namelength); | |
2335 | buf[namelength] = '\0'; | |
2336 | SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, &objfile->psymbol_cache); | |
2337 | ||
2338 | buf = alloca (dem_namelength + 1); | |
2339 | memcpy (buf, dem_name, dem_namelength); | |
2340 | buf[dem_namelength] = '\0'; | |
c5aa993b | 2341 | |
c906108c SS |
2342 | switch (language) |
2343 | { | |
c5aa993b JM |
2344 | case language_c: |
2345 | case language_cplus: | |
2346 | SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol) = | |
2347 | bcache (buf, dem_namelength + 1, &objfile->psymbol_cache); | |
2348 | break; | |
2349 | case language_chill: | |
2350 | SYMBOL_CHILL_DEMANGLED_NAME (&psymbol) = | |
2351 | bcache (buf, dem_namelength + 1, &objfile->psymbol_cache); | |
2352 | ||
c906108c SS |
2353 | /* FIXME What should be done for the default case? Ignoring for now. */ |
2354 | } | |
2355 | ||
2356 | /* val and coreaddr are mutually exclusive, one of them *will* be zero */ | |
2357 | if (val != 0) | |
2358 | { | |
2359 | SYMBOL_VALUE (&psymbol) = val; | |
2360 | } | |
2361 | else | |
2362 | { | |
2363 | SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr; | |
2364 | } | |
2365 | SYMBOL_SECTION (&psymbol) = 0; | |
2366 | SYMBOL_LANGUAGE (&psymbol) = language; | |
2367 | PSYMBOL_NAMESPACE (&psymbol) = namespace; | |
2368 | PSYMBOL_CLASS (&psymbol) = class; | |
2369 | SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language); | |
2370 | ||
2371 | /* Stash the partial symbol away in the cache */ | |
2372 | psym = bcache (&psymbol, sizeof (struct partial_symbol), &objfile->psymbol_cache); | |
2373 | ||
2374 | /* Save pointer to partial symbol in psymtab, growing symtab if needed. */ | |
2375 | if (list->next >= list->list + list->size) | |
2376 | { | |
2377 | extend_psymbol_list (list, objfile); | |
2378 | } | |
2379 | *list->next++ = psym; | |
2380 | OBJSTAT (objfile, n_psyms++); | |
2381 | } | |
2382 | ||
2383 | /* Initialize storage for partial symbols. */ | |
2384 | ||
2385 | void | |
fba45db2 | 2386 | init_psymbol_list (struct objfile *objfile, int total_symbols) |
c906108c SS |
2387 | { |
2388 | /* Free any previously allocated psymbol lists. */ | |
c5aa993b JM |
2389 | |
2390 | if (objfile->global_psymbols.list) | |
c906108c | 2391 | { |
c5aa993b | 2392 | mfree (objfile->md, (PTR) objfile->global_psymbols.list); |
c906108c | 2393 | } |
c5aa993b | 2394 | if (objfile->static_psymbols.list) |
c906108c | 2395 | { |
c5aa993b | 2396 | mfree (objfile->md, (PTR) objfile->static_psymbols.list); |
c906108c | 2397 | } |
c5aa993b | 2398 | |
c906108c SS |
2399 | /* Current best guess is that approximately a twentieth |
2400 | of the total symbols (in a debugging file) are global or static | |
2401 | oriented symbols */ | |
c906108c | 2402 | |
c5aa993b JM |
2403 | objfile->global_psymbols.size = total_symbols / 10; |
2404 | objfile->static_psymbols.size = total_symbols / 10; | |
2405 | ||
2406 | if (objfile->global_psymbols.size > 0) | |
c906108c | 2407 | { |
c5aa993b JM |
2408 | objfile->global_psymbols.next = |
2409 | objfile->global_psymbols.list = (struct partial_symbol **) | |
2410 | xmmalloc (objfile->md, (objfile->global_psymbols.size | |
2411 | * sizeof (struct partial_symbol *))); | |
c906108c | 2412 | } |
c5aa993b | 2413 | if (objfile->static_psymbols.size > 0) |
c906108c | 2414 | { |
c5aa993b JM |
2415 | objfile->static_psymbols.next = |
2416 | objfile->static_psymbols.list = (struct partial_symbol **) | |
2417 | xmmalloc (objfile->md, (objfile->static_psymbols.size | |
2418 | * sizeof (struct partial_symbol *))); | |
c906108c SS |
2419 | } |
2420 | } | |
2421 | ||
2422 | /* OVERLAYS: | |
2423 | The following code implements an abstraction for debugging overlay sections. | |
2424 | ||
2425 | The target model is as follows: | |
2426 | 1) The gnu linker will permit multiple sections to be mapped into the | |
c5aa993b | 2427 | same VMA, each with its own unique LMA (or load address). |
c906108c | 2428 | 2) It is assumed that some runtime mechanism exists for mapping the |
c5aa993b | 2429 | sections, one by one, from the load address into the VMA address. |
c906108c | 2430 | 3) This code provides a mechanism for gdb to keep track of which |
c5aa993b JM |
2431 | sections should be considered to be mapped from the VMA to the LMA. |
2432 | This information is used for symbol lookup, and memory read/write. | |
2433 | For instance, if a section has been mapped then its contents | |
2434 | should be read from the VMA, otherwise from the LMA. | |
c906108c SS |
2435 | |
2436 | Two levels of debugger support for overlays are available. One is | |
2437 | "manual", in which the debugger relies on the user to tell it which | |
2438 | overlays are currently mapped. This level of support is | |
2439 | implemented entirely in the core debugger, and the information about | |
2440 | whether a section is mapped is kept in the objfile->obj_section table. | |
2441 | ||
2442 | The second level of support is "automatic", and is only available if | |
2443 | the target-specific code provides functionality to read the target's | |
2444 | overlay mapping table, and translate its contents for the debugger | |
2445 | (by updating the mapped state information in the obj_section tables). | |
2446 | ||
2447 | The interface is as follows: | |
c5aa993b JM |
2448 | User commands: |
2449 | overlay map <name> -- tell gdb to consider this section mapped | |
2450 | overlay unmap <name> -- tell gdb to consider this section unmapped | |
2451 | overlay list -- list the sections that GDB thinks are mapped | |
2452 | overlay read-target -- get the target's state of what's mapped | |
2453 | overlay off/manual/auto -- set overlay debugging state | |
2454 | Functional interface: | |
2455 | find_pc_mapped_section(pc): if the pc is in the range of a mapped | |
2456 | section, return that section. | |
2457 | find_pc_overlay(pc): find any overlay section that contains | |
2458 | the pc, either in its VMA or its LMA | |
2459 | overlay_is_mapped(sect): true if overlay is marked as mapped | |
2460 | section_is_overlay(sect): true if section's VMA != LMA | |
2461 | pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA | |
2462 | pc_in_unmapped_range(...): true if pc belongs to section's LMA | |
2463 | overlay_mapped_address(...): map an address from section's LMA to VMA | |
2464 | overlay_unmapped_address(...): map an address from section's VMA to LMA | |
2465 | symbol_overlayed_address(...): Return a "current" address for symbol: | |
2466 | either in VMA or LMA depending on whether | |
2467 | the symbol's section is currently mapped | |
c906108c SS |
2468 | */ |
2469 | ||
2470 | /* Overlay debugging state: */ | |
2471 | ||
2472 | int overlay_debugging = 0; /* 0 == off, 1 == manual, -1 == auto */ | |
2473 | int overlay_cache_invalid = 0; /* True if need to refresh mapped state */ | |
2474 | ||
2475 | /* Target vector for refreshing overlay mapped state */ | |
a14ed312 | 2476 | static void simple_overlay_update (struct obj_section *); |
507f3c78 | 2477 | void (*target_overlay_update) (struct obj_section *) = simple_overlay_update; |
c906108c SS |
2478 | |
2479 | /* Function: section_is_overlay (SECTION) | |
2480 | Returns true if SECTION has VMA not equal to LMA, ie. | |
2481 | SECTION is loaded at an address different from where it will "run". */ | |
2482 | ||
2483 | int | |
fba45db2 | 2484 | section_is_overlay (asection *section) |
c906108c SS |
2485 | { |
2486 | if (overlay_debugging) | |
2487 | if (section && section->lma != 0 && | |
2488 | section->vma != section->lma) | |
2489 | return 1; | |
2490 | ||
2491 | return 0; | |
2492 | } | |
2493 | ||
2494 | /* Function: overlay_invalidate_all (void) | |
2495 | Invalidate the mapped state of all overlay sections (mark it as stale). */ | |
2496 | ||
2497 | static void | |
fba45db2 | 2498 | overlay_invalidate_all (void) |
c906108c | 2499 | { |
c5aa993b | 2500 | struct objfile *objfile; |
c906108c SS |
2501 | struct obj_section *sect; |
2502 | ||
2503 | ALL_OBJSECTIONS (objfile, sect) | |
2504 | if (section_is_overlay (sect->the_bfd_section)) | |
c5aa993b | 2505 | sect->ovly_mapped = -1; |
c906108c SS |
2506 | } |
2507 | ||
2508 | /* Function: overlay_is_mapped (SECTION) | |
2509 | Returns true if section is an overlay, and is currently mapped. | |
2510 | Private: public access is thru function section_is_mapped. | |
2511 | ||
2512 | Access to the ovly_mapped flag is restricted to this function, so | |
2513 | that we can do automatic update. If the global flag | |
2514 | OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call | |
2515 | overlay_invalidate_all. If the mapped state of the particular | |
2516 | section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */ | |
2517 | ||
c5aa993b | 2518 | static int |
fba45db2 | 2519 | overlay_is_mapped (struct obj_section *osect) |
c906108c SS |
2520 | { |
2521 | if (osect == 0 || !section_is_overlay (osect->the_bfd_section)) | |
2522 | return 0; | |
2523 | ||
c5aa993b | 2524 | switch (overlay_debugging) |
c906108c SS |
2525 | { |
2526 | default: | |
c5aa993b JM |
2527 | case 0: |
2528 | return 0; /* overlay debugging off */ | |
c906108c SS |
2529 | case -1: /* overlay debugging automatic */ |
2530 | /* Unles there is a target_overlay_update function, | |
c5aa993b | 2531 | there's really nothing useful to do here (can't really go auto) */ |
c906108c SS |
2532 | if (target_overlay_update) |
2533 | { | |
2534 | if (overlay_cache_invalid) | |
2535 | { | |
2536 | overlay_invalidate_all (); | |
2537 | overlay_cache_invalid = 0; | |
2538 | } | |
2539 | if (osect->ovly_mapped == -1) | |
2540 | (*target_overlay_update) (osect); | |
2541 | } | |
2542 | /* fall thru to manual case */ | |
2543 | case 1: /* overlay debugging manual */ | |
2544 | return osect->ovly_mapped == 1; | |
2545 | } | |
2546 | } | |
2547 | ||
2548 | /* Function: section_is_mapped | |
2549 | Returns true if section is an overlay, and is currently mapped. */ | |
2550 | ||
2551 | int | |
fba45db2 | 2552 | section_is_mapped (asection *section) |
c906108c | 2553 | { |
c5aa993b | 2554 | struct objfile *objfile; |
c906108c SS |
2555 | struct obj_section *osect; |
2556 | ||
2557 | if (overlay_debugging) | |
2558 | if (section && section_is_overlay (section)) | |
2559 | ALL_OBJSECTIONS (objfile, osect) | |
2560 | if (osect->the_bfd_section == section) | |
c5aa993b | 2561 | return overlay_is_mapped (osect); |
c906108c SS |
2562 | |
2563 | return 0; | |
2564 | } | |
2565 | ||
2566 | /* Function: pc_in_unmapped_range | |
2567 | If PC falls into the lma range of SECTION, return true, else false. */ | |
2568 | ||
2569 | CORE_ADDR | |
fba45db2 | 2570 | pc_in_unmapped_range (CORE_ADDR pc, asection *section) |
c906108c SS |
2571 | { |
2572 | int size; | |
2573 | ||
2574 | if (overlay_debugging) | |
2575 | if (section && section_is_overlay (section)) | |
2576 | { | |
2577 | size = bfd_get_section_size_before_reloc (section); | |
2578 | if (section->lma <= pc && pc < section->lma + size) | |
2579 | return 1; | |
2580 | } | |
2581 | return 0; | |
2582 | } | |
2583 | ||
2584 | /* Function: pc_in_mapped_range | |
2585 | If PC falls into the vma range of SECTION, return true, else false. */ | |
2586 | ||
2587 | CORE_ADDR | |
fba45db2 | 2588 | pc_in_mapped_range (CORE_ADDR pc, asection *section) |
c906108c SS |
2589 | { |
2590 | int size; | |
2591 | ||
2592 | if (overlay_debugging) | |
2593 | if (section && section_is_overlay (section)) | |
2594 | { | |
2595 | size = bfd_get_section_size_before_reloc (section); | |
2596 | if (section->vma <= pc && pc < section->vma + size) | |
2597 | return 1; | |
2598 | } | |
2599 | return 0; | |
2600 | } | |
2601 | ||
2602 | /* Function: overlay_unmapped_address (PC, SECTION) | |
2603 | Returns the address corresponding to PC in the unmapped (load) range. | |
2604 | May be the same as PC. */ | |
2605 | ||
2606 | CORE_ADDR | |
fba45db2 | 2607 | overlay_unmapped_address (CORE_ADDR pc, asection *section) |
c906108c SS |
2608 | { |
2609 | if (overlay_debugging) | |
2610 | if (section && section_is_overlay (section) && | |
2611 | pc_in_mapped_range (pc, section)) | |
2612 | return pc + section->lma - section->vma; | |
2613 | ||
2614 | return pc; | |
2615 | } | |
2616 | ||
2617 | /* Function: overlay_mapped_address (PC, SECTION) | |
2618 | Returns the address corresponding to PC in the mapped (runtime) range. | |
2619 | May be the same as PC. */ | |
2620 | ||
2621 | CORE_ADDR | |
fba45db2 | 2622 | overlay_mapped_address (CORE_ADDR pc, asection *section) |
c906108c SS |
2623 | { |
2624 | if (overlay_debugging) | |
2625 | if (section && section_is_overlay (section) && | |
2626 | pc_in_unmapped_range (pc, section)) | |
2627 | return pc + section->vma - section->lma; | |
2628 | ||
2629 | return pc; | |
2630 | } | |
2631 | ||
2632 | ||
2633 | /* Function: symbol_overlayed_address | |
2634 | Return one of two addresses (relative to the VMA or to the LMA), | |
2635 | depending on whether the section is mapped or not. */ | |
2636 | ||
c5aa993b | 2637 | CORE_ADDR |
fba45db2 | 2638 | symbol_overlayed_address (CORE_ADDR address, asection *section) |
c906108c SS |
2639 | { |
2640 | if (overlay_debugging) | |
2641 | { | |
2642 | /* If the symbol has no section, just return its regular address. */ | |
2643 | if (section == 0) | |
2644 | return address; | |
2645 | /* If the symbol's section is not an overlay, just return its address */ | |
2646 | if (!section_is_overlay (section)) | |
2647 | return address; | |
2648 | /* If the symbol's section is mapped, just return its address */ | |
2649 | if (section_is_mapped (section)) | |
2650 | return address; | |
2651 | /* | |
2652 | * HOWEVER: if the symbol is in an overlay section which is NOT mapped, | |
2653 | * then return its LOADED address rather than its vma address!! | |
2654 | */ | |
2655 | return overlay_unmapped_address (address, section); | |
2656 | } | |
2657 | return address; | |
2658 | } | |
2659 | ||
2660 | /* Function: find_pc_overlay (PC) | |
2661 | Return the best-match overlay section for PC: | |
2662 | If PC matches a mapped overlay section's VMA, return that section. | |
2663 | Else if PC matches an unmapped section's VMA, return that section. | |
2664 | Else if PC matches an unmapped section's LMA, return that section. */ | |
2665 | ||
2666 | asection * | |
fba45db2 | 2667 | find_pc_overlay (CORE_ADDR pc) |
c906108c | 2668 | { |
c5aa993b | 2669 | struct objfile *objfile; |
c906108c SS |
2670 | struct obj_section *osect, *best_match = NULL; |
2671 | ||
2672 | if (overlay_debugging) | |
2673 | ALL_OBJSECTIONS (objfile, osect) | |
2674 | if (section_is_overlay (osect->the_bfd_section)) | |
c5aa993b JM |
2675 | { |
2676 | if (pc_in_mapped_range (pc, osect->the_bfd_section)) | |
2677 | { | |
2678 | if (overlay_is_mapped (osect)) | |
2679 | return osect->the_bfd_section; | |
2680 | else | |
2681 | best_match = osect; | |
2682 | } | |
2683 | else if (pc_in_unmapped_range (pc, osect->the_bfd_section)) | |
2684 | best_match = osect; | |
2685 | } | |
c906108c SS |
2686 | return best_match ? best_match->the_bfd_section : NULL; |
2687 | } | |
2688 | ||
2689 | /* Function: find_pc_mapped_section (PC) | |
2690 | If PC falls into the VMA address range of an overlay section that is | |
2691 | currently marked as MAPPED, return that section. Else return NULL. */ | |
2692 | ||
2693 | asection * | |
fba45db2 | 2694 | find_pc_mapped_section (CORE_ADDR pc) |
c906108c | 2695 | { |
c5aa993b | 2696 | struct objfile *objfile; |
c906108c SS |
2697 | struct obj_section *osect; |
2698 | ||
2699 | if (overlay_debugging) | |
2700 | ALL_OBJSECTIONS (objfile, osect) | |
2701 | if (pc_in_mapped_range (pc, osect->the_bfd_section) && | |
2702 | overlay_is_mapped (osect)) | |
c5aa993b | 2703 | return osect->the_bfd_section; |
c906108c SS |
2704 | |
2705 | return NULL; | |
2706 | } | |
2707 | ||
2708 | /* Function: list_overlays_command | |
2709 | Print a list of mapped sections and their PC ranges */ | |
2710 | ||
2711 | void | |
fba45db2 | 2712 | list_overlays_command (char *args, int from_tty) |
c906108c | 2713 | { |
c5aa993b JM |
2714 | int nmapped = 0; |
2715 | struct objfile *objfile; | |
c906108c SS |
2716 | struct obj_section *osect; |
2717 | ||
2718 | if (overlay_debugging) | |
2719 | ALL_OBJSECTIONS (objfile, osect) | |
2720 | if (overlay_is_mapped (osect)) | |
c5aa993b JM |
2721 | { |
2722 | const char *name; | |
2723 | bfd_vma lma, vma; | |
2724 | int size; | |
2725 | ||
2726 | vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section); | |
2727 | lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section); | |
2728 | size = bfd_get_section_size_before_reloc (osect->the_bfd_section); | |
2729 | name = bfd_section_name (objfile->obfd, osect->the_bfd_section); | |
2730 | ||
2731 | printf_filtered ("Section %s, loaded at ", name); | |
2732 | print_address_numeric (lma, 1, gdb_stdout); | |
2733 | puts_filtered (" - "); | |
2734 | print_address_numeric (lma + size, 1, gdb_stdout); | |
2735 | printf_filtered (", mapped at "); | |
2736 | print_address_numeric (vma, 1, gdb_stdout); | |
2737 | puts_filtered (" - "); | |
2738 | print_address_numeric (vma + size, 1, gdb_stdout); | |
2739 | puts_filtered ("\n"); | |
2740 | ||
2741 | nmapped++; | |
2742 | } | |
c906108c SS |
2743 | if (nmapped == 0) |
2744 | printf_filtered ("No sections are mapped.\n"); | |
2745 | } | |
2746 | ||
2747 | /* Function: map_overlay_command | |
2748 | Mark the named section as mapped (ie. residing at its VMA address). */ | |
2749 | ||
2750 | void | |
fba45db2 | 2751 | map_overlay_command (char *args, int from_tty) |
c906108c | 2752 | { |
c5aa993b JM |
2753 | struct objfile *objfile, *objfile2; |
2754 | struct obj_section *sec, *sec2; | |
2755 | asection *bfdsec; | |
c906108c SS |
2756 | |
2757 | if (!overlay_debugging) | |
515ad16c EZ |
2758 | error ("\ |
2759 | Overlay debugging not enabled. Use either the 'overlay auto' or\n\ | |
2760 | the 'overlay manual' command."); | |
c906108c SS |
2761 | |
2762 | if (args == 0 || *args == 0) | |
2763 | error ("Argument required: name of an overlay section"); | |
2764 | ||
2765 | /* First, find a section matching the user supplied argument */ | |
2766 | ALL_OBJSECTIONS (objfile, sec) | |
2767 | if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args)) | |
c5aa993b JM |
2768 | { |
2769 | /* Now, check to see if the section is an overlay. */ | |
2770 | bfdsec = sec->the_bfd_section; | |
2771 | if (!section_is_overlay (bfdsec)) | |
2772 | continue; /* not an overlay section */ | |
2773 | ||
2774 | /* Mark the overlay as "mapped" */ | |
2775 | sec->ovly_mapped = 1; | |
2776 | ||
2777 | /* Next, make a pass and unmap any sections that are | |
2778 | overlapped by this new section: */ | |
2779 | ALL_OBJSECTIONS (objfile2, sec2) | |
2780 | if (sec2->ovly_mapped && | |
2781 | sec != sec2 && | |
2782 | sec->the_bfd_section != sec2->the_bfd_section && | |
2783 | (pc_in_mapped_range (sec2->addr, sec->the_bfd_section) || | |
2784 | pc_in_mapped_range (sec2->endaddr, sec->the_bfd_section))) | |
2785 | { | |
2786 | if (info_verbose) | |
2787 | printf_filtered ("Note: section %s unmapped by overlap\n", | |
2788 | bfd_section_name (objfile->obfd, | |
2789 | sec2->the_bfd_section)); | |
2790 | sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2 */ | |
2791 | } | |
2792 | return; | |
2793 | } | |
c906108c SS |
2794 | error ("No overlay section called %s", args); |
2795 | } | |
2796 | ||
2797 | /* Function: unmap_overlay_command | |
2798 | Mark the overlay section as unmapped | |
2799 | (ie. resident in its LMA address range, rather than the VMA range). */ | |
2800 | ||
2801 | void | |
fba45db2 | 2802 | unmap_overlay_command (char *args, int from_tty) |
c906108c | 2803 | { |
c5aa993b | 2804 | struct objfile *objfile; |
c906108c SS |
2805 | struct obj_section *sec; |
2806 | ||
2807 | if (!overlay_debugging) | |
515ad16c EZ |
2808 | error ("\ |
2809 | Overlay debugging not enabled. Use either the 'overlay auto' or\n\ | |
2810 | the 'overlay manual' command."); | |
c906108c SS |
2811 | |
2812 | if (args == 0 || *args == 0) | |
2813 | error ("Argument required: name of an overlay section"); | |
2814 | ||
2815 | /* First, find a section matching the user supplied argument */ | |
2816 | ALL_OBJSECTIONS (objfile, sec) | |
2817 | if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args)) | |
c5aa993b JM |
2818 | { |
2819 | if (!sec->ovly_mapped) | |
2820 | error ("Section %s is not mapped", args); | |
2821 | sec->ovly_mapped = 0; | |
2822 | return; | |
2823 | } | |
c906108c SS |
2824 | error ("No overlay section called %s", args); |
2825 | } | |
2826 | ||
2827 | /* Function: overlay_auto_command | |
2828 | A utility command to turn on overlay debugging. | |
2829 | Possibly this should be done via a set/show command. */ | |
2830 | ||
2831 | static void | |
fba45db2 | 2832 | overlay_auto_command (char *args, int from_tty) |
c906108c SS |
2833 | { |
2834 | overlay_debugging = -1; | |
2835 | if (info_verbose) | |
2836 | printf_filtered ("Automatic overlay debugging enabled."); | |
2837 | } | |
2838 | ||
2839 | /* Function: overlay_manual_command | |
2840 | A utility command to turn on overlay debugging. | |
2841 | Possibly this should be done via a set/show command. */ | |
2842 | ||
2843 | static void | |
fba45db2 | 2844 | overlay_manual_command (char *args, int from_tty) |
c906108c SS |
2845 | { |
2846 | overlay_debugging = 1; | |
2847 | if (info_verbose) | |
2848 | printf_filtered ("Overlay debugging enabled."); | |
2849 | } | |
2850 | ||
2851 | /* Function: overlay_off_command | |
2852 | A utility command to turn on overlay debugging. | |
2853 | Possibly this should be done via a set/show command. */ | |
2854 | ||
2855 | static void | |
fba45db2 | 2856 | overlay_off_command (char *args, int from_tty) |
c906108c | 2857 | { |
c5aa993b | 2858 | overlay_debugging = 0; |
c906108c SS |
2859 | if (info_verbose) |
2860 | printf_filtered ("Overlay debugging disabled."); | |
2861 | } | |
2862 | ||
2863 | static void | |
fba45db2 | 2864 | overlay_load_command (char *args, int from_tty) |
c906108c SS |
2865 | { |
2866 | if (target_overlay_update) | |
2867 | (*target_overlay_update) (NULL); | |
2868 | else | |
2869 | error ("This target does not know how to read its overlay state."); | |
2870 | } | |
2871 | ||
2872 | /* Function: overlay_command | |
2873 | A place-holder for a mis-typed command */ | |
2874 | ||
2875 | /* Command list chain containing all defined "overlay" subcommands. */ | |
2876 | struct cmd_list_element *overlaylist; | |
2877 | ||
2878 | static void | |
fba45db2 | 2879 | overlay_command (char *args, int from_tty) |
c906108c | 2880 | { |
c5aa993b | 2881 | printf_unfiltered |
c906108c SS |
2882 | ("\"overlay\" must be followed by the name of an overlay command.\n"); |
2883 | help_list (overlaylist, "overlay ", -1, gdb_stdout); | |
2884 | } | |
2885 | ||
2886 | ||
2887 | /* Target Overlays for the "Simplest" overlay manager: | |
2888 | ||
2889 | This is GDB's default target overlay layer. It works with the | |
2890 | minimal overlay manager supplied as an example by Cygnus. The | |
2891 | entry point is via a function pointer "target_overlay_update", | |
2892 | so targets that use a different runtime overlay manager can | |
2893 | substitute their own overlay_update function and take over the | |
2894 | function pointer. | |
2895 | ||
2896 | The overlay_update function pokes around in the target's data structures | |
2897 | to see what overlays are mapped, and updates GDB's overlay mapping with | |
2898 | this information. | |
2899 | ||
2900 | In this simple implementation, the target data structures are as follows: | |
c5aa993b JM |
2901 | unsigned _novlys; /# number of overlay sections #/ |
2902 | unsigned _ovly_table[_novlys][4] = { | |
2903 | {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/ | |
2904 | {..., ..., ..., ...}, | |
2905 | } | |
2906 | unsigned _novly_regions; /# number of overlay regions #/ | |
2907 | unsigned _ovly_region_table[_novly_regions][3] = { | |
2908 | {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/ | |
2909 | {..., ..., ...}, | |
2910 | } | |
c906108c SS |
2911 | These functions will attempt to update GDB's mappedness state in the |
2912 | symbol section table, based on the target's mappedness state. | |
2913 | ||
2914 | To do this, we keep a cached copy of the target's _ovly_table, and | |
2915 | attempt to detect when the cached copy is invalidated. The main | |
2916 | entry point is "simple_overlay_update(SECT), which looks up SECT in | |
2917 | the cached table and re-reads only the entry for that section from | |
2918 | the target (whenever possible). | |
2919 | */ | |
2920 | ||
2921 | /* Cached, dynamically allocated copies of the target data structures: */ | |
c5aa993b | 2922 | static unsigned (*cache_ovly_table)[4] = 0; |
c906108c | 2923 | #if 0 |
c5aa993b | 2924 | static unsigned (*cache_ovly_region_table)[3] = 0; |
c906108c | 2925 | #endif |
c5aa993b | 2926 | static unsigned cache_novlys = 0; |
c906108c | 2927 | #if 0 |
c5aa993b | 2928 | static unsigned cache_novly_regions = 0; |
c906108c SS |
2929 | #endif |
2930 | static CORE_ADDR cache_ovly_table_base = 0; | |
2931 | #if 0 | |
2932 | static CORE_ADDR cache_ovly_region_table_base = 0; | |
2933 | #endif | |
c5aa993b JM |
2934 | enum ovly_index |
2935 | { | |
2936 | VMA, SIZE, LMA, MAPPED | |
2937 | }; | |
c906108c SS |
2938 | #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT) |
2939 | ||
2940 | /* Throw away the cached copy of _ovly_table */ | |
2941 | static void | |
fba45db2 | 2942 | simple_free_overlay_table (void) |
c906108c SS |
2943 | { |
2944 | if (cache_ovly_table) | |
b8c9b27d | 2945 | xfree (cache_ovly_table); |
c5aa993b | 2946 | cache_novlys = 0; |
c906108c SS |
2947 | cache_ovly_table = NULL; |
2948 | cache_ovly_table_base = 0; | |
2949 | } | |
2950 | ||
2951 | #if 0 | |
2952 | /* Throw away the cached copy of _ovly_region_table */ | |
2953 | static void | |
fba45db2 | 2954 | simple_free_overlay_region_table (void) |
c906108c SS |
2955 | { |
2956 | if (cache_ovly_region_table) | |
b8c9b27d | 2957 | xfree (cache_ovly_region_table); |
c5aa993b | 2958 | cache_novly_regions = 0; |
c906108c SS |
2959 | cache_ovly_region_table = NULL; |
2960 | cache_ovly_region_table_base = 0; | |
2961 | } | |
2962 | #endif | |
2963 | ||
2964 | /* Read an array of ints from the target into a local buffer. | |
2965 | Convert to host order. int LEN is number of ints */ | |
2966 | static void | |
fba45db2 | 2967 | read_target_long_array (CORE_ADDR memaddr, unsigned int *myaddr, int len) |
c906108c SS |
2968 | { |
2969 | char *buf = alloca (len * TARGET_LONG_BYTES); | |
c5aa993b | 2970 | int i; |
c906108c SS |
2971 | |
2972 | read_memory (memaddr, buf, len * TARGET_LONG_BYTES); | |
2973 | for (i = 0; i < len; i++) | |
c5aa993b | 2974 | myaddr[i] = extract_unsigned_integer (TARGET_LONG_BYTES * i + buf, |
c906108c SS |
2975 | TARGET_LONG_BYTES); |
2976 | } | |
2977 | ||
2978 | /* Find and grab a copy of the target _ovly_table | |
2979 | (and _novlys, which is needed for the table's size) */ | |
c5aa993b | 2980 | static int |
fba45db2 | 2981 | simple_read_overlay_table (void) |
c906108c SS |
2982 | { |
2983 | struct minimal_symbol *msym; | |
2984 | ||
2985 | simple_free_overlay_table (); | |
2986 | msym = lookup_minimal_symbol ("_novlys", 0, 0); | |
2987 | if (msym != NULL) | |
2988 | cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4); | |
c5aa993b JM |
2989 | else |
2990 | return 0; /* failure */ | |
2991 | cache_ovly_table = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table)); | |
c906108c SS |
2992 | if (cache_ovly_table != NULL) |
2993 | { | |
2994 | msym = lookup_minimal_symbol ("_ovly_table", 0, 0); | |
2995 | if (msym != NULL) | |
2996 | { | |
2997 | cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (msym); | |
c5aa993b JM |
2998 | read_target_long_array (cache_ovly_table_base, |
2999 | (int *) cache_ovly_table, | |
c906108c SS |
3000 | cache_novlys * 4); |
3001 | } | |
c5aa993b JM |
3002 | else |
3003 | return 0; /* failure */ | |
c906108c | 3004 | } |
c5aa993b JM |
3005 | else |
3006 | return 0; /* failure */ | |
3007 | return 1; /* SUCCESS */ | |
c906108c SS |
3008 | } |
3009 | ||
3010 | #if 0 | |
3011 | /* Find and grab a copy of the target _ovly_region_table | |
3012 | (and _novly_regions, which is needed for the table's size) */ | |
c5aa993b | 3013 | static int |
fba45db2 | 3014 | simple_read_overlay_region_table (void) |
c906108c SS |
3015 | { |
3016 | struct minimal_symbol *msym; | |
3017 | ||
3018 | simple_free_overlay_region_table (); | |
3019 | msym = lookup_minimal_symbol ("_novly_regions", 0, 0); | |
3020 | if (msym != NULL) | |
3021 | cache_novly_regions = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4); | |
c5aa993b JM |
3022 | else |
3023 | return 0; /* failure */ | |
c906108c SS |
3024 | cache_ovly_region_table = (void *) xmalloc (cache_novly_regions * 12); |
3025 | if (cache_ovly_region_table != NULL) | |
3026 | { | |
3027 | msym = lookup_minimal_symbol ("_ovly_region_table", 0, 0); | |
3028 | if (msym != NULL) | |
3029 | { | |
3030 | cache_ovly_region_table_base = SYMBOL_VALUE_ADDRESS (msym); | |
c5aa993b JM |
3031 | read_target_long_array (cache_ovly_region_table_base, |
3032 | (int *) cache_ovly_region_table, | |
c906108c SS |
3033 | cache_novly_regions * 3); |
3034 | } | |
c5aa993b JM |
3035 | else |
3036 | return 0; /* failure */ | |
c906108c | 3037 | } |
c5aa993b JM |
3038 | else |
3039 | return 0; /* failure */ | |
3040 | return 1; /* SUCCESS */ | |
c906108c SS |
3041 | } |
3042 | #endif | |
3043 | ||
3044 | /* Function: simple_overlay_update_1 | |
3045 | A helper function for simple_overlay_update. Assuming a cached copy | |
3046 | of _ovly_table exists, look through it to find an entry whose vma, | |
3047 | lma and size match those of OSECT. Re-read the entry and make sure | |
3048 | it still matches OSECT (else the table may no longer be valid). | |
3049 | Set OSECT's mapped state to match the entry. Return: 1 for | |
3050 | success, 0 for failure. */ | |
3051 | ||
3052 | static int | |
fba45db2 | 3053 | simple_overlay_update_1 (struct obj_section *osect) |
c906108c SS |
3054 | { |
3055 | int i, size; | |
3056 | ||
3057 | size = bfd_get_section_size_before_reloc (osect->the_bfd_section); | |
3058 | for (i = 0; i < cache_novlys; i++) | |
c5aa993b JM |
3059 | if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma && |
3060 | cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* && | |
3061 | cache_ovly_table[i][SIZE] == size */ ) | |
c906108c SS |
3062 | { |
3063 | read_target_long_array (cache_ovly_table_base + i * TARGET_LONG_BYTES, | |
3064 | (int *) cache_ovly_table[i], 4); | |
c5aa993b JM |
3065 | if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma && |
3066 | cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* && | |
3067 | cache_ovly_table[i][SIZE] == size */ ) | |
c906108c SS |
3068 | { |
3069 | osect->ovly_mapped = cache_ovly_table[i][MAPPED]; | |
3070 | return 1; | |
3071 | } | |
c5aa993b | 3072 | else /* Warning! Warning! Target's ovly table has changed! */ |
c906108c SS |
3073 | return 0; |
3074 | } | |
3075 | return 0; | |
3076 | } | |
3077 | ||
3078 | /* Function: simple_overlay_update | |
3079 | If OSECT is NULL, then update all sections' mapped state | |
3080 | (after re-reading the entire target _ovly_table). | |
3081 | If OSECT is non-NULL, then try to find a matching entry in the | |
3082 | cached ovly_table and update only OSECT's mapped state. | |
3083 | If a cached entry can't be found or the cache isn't valid, then | |
3084 | re-read the entire cache, and go ahead and update all sections. */ | |
3085 | ||
3086 | static void | |
fba45db2 | 3087 | simple_overlay_update (struct obj_section *osect) |
c906108c | 3088 | { |
c5aa993b | 3089 | struct objfile *objfile; |
c906108c SS |
3090 | |
3091 | /* Were we given an osect to look up? NULL means do all of them. */ | |
3092 | if (osect) | |
3093 | /* Have we got a cached copy of the target's overlay table? */ | |
3094 | if (cache_ovly_table != NULL) | |
3095 | /* Does its cached location match what's currently in the symtab? */ | |
c5aa993b | 3096 | if (cache_ovly_table_base == |
c906108c SS |
3097 | SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", 0, 0))) |
3098 | /* Then go ahead and try to look up this single section in the cache */ | |
3099 | if (simple_overlay_update_1 (osect)) | |
3100 | /* Found it! We're done. */ | |
3101 | return; | |
3102 | ||
3103 | /* Cached table no good: need to read the entire table anew. | |
3104 | Or else we want all the sections, in which case it's actually | |
3105 | more efficient to read the whole table in one block anyway. */ | |
3106 | ||
3107 | if (simple_read_overlay_table () == 0) /* read failed? No table? */ | |
3108 | { | |
3109 | warning ("Failed to read the target overlay mapping table."); | |
3110 | return; | |
3111 | } | |
3112 | /* Now may as well update all sections, even if only one was requested. */ | |
3113 | ALL_OBJSECTIONS (objfile, osect) | |
3114 | if (section_is_overlay (osect->the_bfd_section)) | |
c5aa993b JM |
3115 | { |
3116 | int i, size; | |
3117 | ||
3118 | size = bfd_get_section_size_before_reloc (osect->the_bfd_section); | |
3119 | for (i = 0; i < cache_novlys; i++) | |
3120 | if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma && | |
3121 | cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* && | |
3122 | cache_ovly_table[i][SIZE] == size */ ) | |
3123 | { /* obj_section matches i'th entry in ovly_table */ | |
3124 | osect->ovly_mapped = cache_ovly_table[i][MAPPED]; | |
3125 | break; /* finished with inner for loop: break out */ | |
3126 | } | |
3127 | } | |
c906108c SS |
3128 | } |
3129 | ||
3130 | ||
3131 | void | |
fba45db2 | 3132 | _initialize_symfile (void) |
c906108c SS |
3133 | { |
3134 | struct cmd_list_element *c; | |
c5aa993b | 3135 | |
c906108c | 3136 | c = add_cmd ("symbol-file", class_files, symbol_file_command, |
c5aa993b | 3137 | "Load symbol table from executable file FILE.\n\ |
c906108c SS |
3138 | The `file' command can also load symbol tables, as well as setting the file\n\ |
3139 | to execute.", &cmdlist); | |
3140 | c->completer = filename_completer; | |
3141 | ||
3142 | c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command, | |
db162d44 | 3143 | "Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\ |
c906108c | 3144 | Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\ |
2acceee2 | 3145 | ADDR is the starting address of the file's text.\n\ |
db162d44 EZ |
3146 | The optional arguments are section-name section-address pairs and\n\ |
3147 | should be specified if the data and bss segments are not contiguous\n\ | |
3148 | with the text. SECT is a section name to be loaded at SECT_ADDR.", | |
c906108c SS |
3149 | &cmdlist); |
3150 | c->completer = filename_completer; | |
3151 | ||
3152 | c = add_cmd ("add-shared-symbol-files", class_files, | |
3153 | add_shared_symbol_files_command, | |
3154 | "Load the symbols from shared objects in the dynamic linker's link map.", | |
c5aa993b | 3155 | &cmdlist); |
c906108c SS |
3156 | c = add_alias_cmd ("assf", "add-shared-symbol-files", class_files, 1, |
3157 | &cmdlist); | |
3158 | ||
3159 | c = add_cmd ("load", class_files, load_command, | |
c5aa993b | 3160 | "Dynamically load FILE into the running program, and record its symbols\n\ |
c906108c SS |
3161 | for access from GDB.", &cmdlist); |
3162 | c->completer = filename_completer; | |
3163 | ||
3164 | add_show_from_set | |
3165 | (add_set_cmd ("symbol-reloading", class_support, var_boolean, | |
c5aa993b JM |
3166 | (char *) &symbol_reloading, |
3167 | "Set dynamic symbol table reloading multiple times in one run.", | |
c906108c SS |
3168 | &setlist), |
3169 | &showlist); | |
3170 | ||
c5aa993b JM |
3171 | add_prefix_cmd ("overlay", class_support, overlay_command, |
3172 | "Commands for debugging overlays.", &overlaylist, | |
c906108c SS |
3173 | "overlay ", 0, &cmdlist); |
3174 | ||
3175 | add_com_alias ("ovly", "overlay", class_alias, 1); | |
3176 | add_com_alias ("ov", "overlay", class_alias, 1); | |
3177 | ||
c5aa993b | 3178 | add_cmd ("map-overlay", class_support, map_overlay_command, |
c906108c SS |
3179 | "Assert that an overlay section is mapped.", &overlaylist); |
3180 | ||
c5aa993b | 3181 | add_cmd ("unmap-overlay", class_support, unmap_overlay_command, |
c906108c SS |
3182 | "Assert that an overlay section is unmapped.", &overlaylist); |
3183 | ||
c5aa993b | 3184 | add_cmd ("list-overlays", class_support, list_overlays_command, |
c906108c SS |
3185 | "List mappings of overlay sections.", &overlaylist); |
3186 | ||
c5aa993b | 3187 | add_cmd ("manual", class_support, overlay_manual_command, |
c906108c | 3188 | "Enable overlay debugging.", &overlaylist); |
c5aa993b | 3189 | add_cmd ("off", class_support, overlay_off_command, |
c906108c | 3190 | "Disable overlay debugging.", &overlaylist); |
c5aa993b | 3191 | add_cmd ("auto", class_support, overlay_auto_command, |
c906108c | 3192 | "Enable automatic overlay debugging.", &overlaylist); |
c5aa993b | 3193 | add_cmd ("load-target", class_support, overlay_load_command, |
c906108c SS |
3194 | "Read the overlay mapping state from the target.", &overlaylist); |
3195 | ||
3196 | /* Filename extension to source language lookup table: */ | |
3197 | init_filename_language_table (); | |
3198 | c = add_set_cmd ("extension-language", class_files, var_string_noescape, | |
c5aa993b | 3199 | (char *) &ext_args, |
c906108c SS |
3200 | "Set mapping between filename extension and source language.\n\ |
3201 | Usage: set extension-language .foo bar", | |
c5aa993b | 3202 | &setlist); |
c906108c SS |
3203 | c->function.cfunc = set_ext_lang_command; |
3204 | ||
c5aa993b | 3205 | add_info ("extensions", info_ext_lang_command, |
c906108c | 3206 | "All filename extensions associated with a source language."); |
917317f4 JM |
3207 | |
3208 | add_show_from_set | |
3209 | (add_set_cmd ("download-write-size", class_obscure, | |
3210 | var_integer, (char *) &download_write_size, | |
3211 | "Set the write size used when downloading a program.\n" | |
3212 | "Only used when downloading a program onto a remote\n" | |
3213 | "target. Specify zero, or a negative value, to disable\n" | |
3214 | "blocked writes. The actual size of each transfer is also\n" | |
3215 | "limited by the size of the target packet and the memory\n" | |
3216 | "cache.\n", | |
3217 | &setlist), | |
3218 | &showlist); | |
c906108c | 3219 | } |