Commit | Line | Data |
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c906108c | 1 | /* Generic symbol file reading for the GNU debugger, GDB. |
8926118c AC |
2 | |
3 | Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, | |
1bac305b | 4 | 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc. |
8926118c | 5 | |
c906108c SS |
6 | Contributed by Cygnus Support, using pieces from other GDB modules. |
7 | ||
c5aa993b | 8 | This file is part of GDB. |
c906108c | 9 | |
c5aa993b JM |
10 | This program is free software; you can redistribute it and/or modify |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2 of the License, or | |
13 | (at your option) any later version. | |
c906108c | 14 | |
c5aa993b JM |
15 | This program is distributed in the hope that it will be useful, |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
c906108c | 19 | |
c5aa993b JM |
20 | You should have received a copy of the GNU General Public License |
21 | along with this program; if not, write to the Free Software | |
22 | Foundation, Inc., 59 Temple Place - Suite 330, | |
23 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
24 | |
25 | #include "defs.h" | |
26 | #include "symtab.h" | |
27 | #include "gdbtypes.h" | |
28 | #include "gdbcore.h" | |
29 | #include "frame.h" | |
30 | #include "target.h" | |
31 | #include "value.h" | |
32 | #include "symfile.h" | |
33 | #include "objfiles.h" | |
0378c332 | 34 | #include "source.h" |
c906108c SS |
35 | #include "gdbcmd.h" |
36 | #include "breakpoint.h" | |
37 | #include "language.h" | |
38 | #include "complaints.h" | |
39 | #include "demangle.h" | |
c5aa993b | 40 | #include "inferior.h" /* for write_pc */ |
c906108c | 41 | #include "gdb-stabs.h" |
04ea0df1 | 42 | #include "gdb_obstack.h" |
d75b5104 | 43 | #include "completer.h" |
af5f3db6 | 44 | #include "bcache.h" |
38017ce8 | 45 | #include <readline/readline.h> |
7e8580c1 | 46 | #include "gdb_assert.h" |
c906108c | 47 | |
c906108c SS |
48 | #include <sys/types.h> |
49 | #include <fcntl.h> | |
50 | #include "gdb_string.h" | |
51 | #include "gdb_stat.h" | |
52 | #include <ctype.h> | |
53 | #include <time.h> | |
c906108c SS |
54 | |
55 | #ifndef O_BINARY | |
56 | #define O_BINARY 0 | |
57 | #endif | |
58 | ||
59 | #ifdef HPUXHPPA | |
60 | ||
61 | /* Some HP-UX related globals to clear when a new "main" | |
62 | symbol file is loaded. HP-specific. */ | |
63 | ||
64 | extern int hp_som_som_object_present; | |
65 | extern int hp_cxx_exception_support_initialized; | |
66 | #define RESET_HP_UX_GLOBALS() do {\ | |
67 | hp_som_som_object_present = 0; /* indicates HP-compiled code */ \ | |
68 | hp_cxx_exception_support_initialized = 0; /* must reinitialize exception stuff */ \ | |
69 | } while (0) | |
70 | #endif | |
71 | ||
917317f4 | 72 | int (*ui_load_progress_hook) (const char *section, unsigned long num); |
c2d11a7d JM |
73 | void (*show_load_progress) (const char *section, |
74 | unsigned long section_sent, | |
75 | unsigned long section_size, | |
76 | unsigned long total_sent, | |
77 | unsigned long total_size); | |
507f3c78 KB |
78 | void (*pre_add_symbol_hook) (char *); |
79 | void (*post_add_symbol_hook) (void); | |
80 | void (*target_new_objfile_hook) (struct objfile *); | |
c906108c | 81 | |
74b7792f AC |
82 | static void clear_symtab_users_cleanup (void *ignore); |
83 | ||
c906108c | 84 | /* Global variables owned by this file */ |
c5aa993b | 85 | int readnow_symbol_files; /* Read full symbols immediately */ |
c906108c | 86 | |
c906108c SS |
87 | /* External variables and functions referenced. */ |
88 | ||
a14ed312 | 89 | extern void report_transfer_performance (unsigned long, time_t, time_t); |
c906108c SS |
90 | |
91 | /* Functions this file defines */ | |
92 | ||
93 | #if 0 | |
a14ed312 KB |
94 | static int simple_read_overlay_region_table (void); |
95 | static void simple_free_overlay_region_table (void); | |
c906108c SS |
96 | #endif |
97 | ||
a14ed312 | 98 | static void set_initial_language (void); |
c906108c | 99 | |
a14ed312 | 100 | static void load_command (char *, int); |
c906108c | 101 | |
d7db6da9 FN |
102 | static void symbol_file_add_main_1 (char *args, int from_tty, int flags); |
103 | ||
a14ed312 | 104 | static void add_symbol_file_command (char *, int); |
c906108c | 105 | |
a14ed312 | 106 | static void add_shared_symbol_files_command (char *, int); |
c906108c | 107 | |
a14ed312 | 108 | static void cashier_psymtab (struct partial_symtab *); |
c906108c | 109 | |
a14ed312 | 110 | bfd *symfile_bfd_open (char *); |
c906108c | 111 | |
0e931cf0 JB |
112 | int get_section_index (struct objfile *, char *); |
113 | ||
a14ed312 | 114 | static void find_sym_fns (struct objfile *); |
c906108c | 115 | |
a14ed312 | 116 | static void decrement_reading_symtab (void *); |
c906108c | 117 | |
a14ed312 | 118 | static void overlay_invalidate_all (void); |
c906108c | 119 | |
a14ed312 | 120 | static int overlay_is_mapped (struct obj_section *); |
c906108c | 121 | |
a14ed312 | 122 | void list_overlays_command (char *, int); |
c906108c | 123 | |
a14ed312 | 124 | void map_overlay_command (char *, int); |
c906108c | 125 | |
a14ed312 | 126 | void unmap_overlay_command (char *, int); |
c906108c | 127 | |
a14ed312 | 128 | static void overlay_auto_command (char *, int); |
c906108c | 129 | |
a14ed312 | 130 | static void overlay_manual_command (char *, int); |
c906108c | 131 | |
a14ed312 | 132 | static void overlay_off_command (char *, int); |
c906108c | 133 | |
a14ed312 | 134 | static void overlay_load_command (char *, int); |
c906108c | 135 | |
a14ed312 | 136 | static void overlay_command (char *, int); |
c906108c | 137 | |
a14ed312 | 138 | static void simple_free_overlay_table (void); |
c906108c | 139 | |
a14ed312 | 140 | static void read_target_long_array (CORE_ADDR, unsigned int *, int); |
c906108c | 141 | |
a14ed312 | 142 | static int simple_read_overlay_table (void); |
c906108c | 143 | |
a14ed312 | 144 | static int simple_overlay_update_1 (struct obj_section *); |
c906108c | 145 | |
a14ed312 | 146 | static void add_filename_language (char *ext, enum language lang); |
392a587b | 147 | |
a14ed312 | 148 | static void set_ext_lang_command (char *args, int from_tty); |
392a587b | 149 | |
a14ed312 | 150 | static void info_ext_lang_command (char *args, int from_tty); |
392a587b | 151 | |
a14ed312 | 152 | static void init_filename_language_table (void); |
392a587b | 153 | |
a14ed312 | 154 | void _initialize_symfile (void); |
c906108c SS |
155 | |
156 | /* List of all available sym_fns. On gdb startup, each object file reader | |
157 | calls add_symtab_fns() to register information on each format it is | |
158 | prepared to read. */ | |
159 | ||
160 | static struct sym_fns *symtab_fns = NULL; | |
161 | ||
162 | /* Flag for whether user will be reloading symbols multiple times. | |
163 | Defaults to ON for VxWorks, otherwise OFF. */ | |
164 | ||
165 | #ifdef SYMBOL_RELOADING_DEFAULT | |
166 | int symbol_reloading = SYMBOL_RELOADING_DEFAULT; | |
167 | #else | |
168 | int symbol_reloading = 0; | |
169 | #endif | |
170 | ||
b7209cb4 FF |
171 | /* If non-zero, shared library symbols will be added automatically |
172 | when the inferior is created, new libraries are loaded, or when | |
173 | attaching to the inferior. This is almost always what users will | |
174 | want to have happen; but for very large programs, the startup time | |
175 | will be excessive, and so if this is a problem, the user can clear | |
176 | this flag and then add the shared library symbols as needed. Note | |
177 | that there is a potential for confusion, since if the shared | |
c906108c | 178 | library symbols are not loaded, commands like "info fun" will *not* |
b7209cb4 | 179 | report all the functions that are actually present. */ |
c906108c SS |
180 | |
181 | int auto_solib_add = 1; | |
b7209cb4 FF |
182 | |
183 | /* For systems that support it, a threshold size in megabytes. If | |
184 | automatically adding a new library's symbol table to those already | |
185 | known to the debugger would cause the total shared library symbol | |
186 | size to exceed this threshhold, then the shlib's symbols are not | |
187 | added. The threshold is ignored if the user explicitly asks for a | |
188 | shlib to be added, such as when using the "sharedlibrary" | |
189 | command. */ | |
190 | ||
191 | int auto_solib_limit; | |
c906108c | 192 | \f |
c5aa993b | 193 | |
c906108c SS |
194 | /* Since this function is called from within qsort, in an ANSI environment |
195 | it must conform to the prototype for qsort, which specifies that the | |
196 | comparison function takes two "void *" pointers. */ | |
197 | ||
198 | static int | |
0cd64fe2 | 199 | compare_symbols (const void *s1p, const void *s2p) |
c906108c SS |
200 | { |
201 | register struct symbol **s1, **s2; | |
202 | ||
203 | s1 = (struct symbol **) s1p; | |
204 | s2 = (struct symbol **) s2p; | |
494b7ec9 | 205 | return (strcmp (SYMBOL_SOURCE_NAME (*s1), SYMBOL_SOURCE_NAME (*s2))); |
c906108c SS |
206 | } |
207 | ||
208 | /* | |
209 | ||
c5aa993b | 210 | LOCAL FUNCTION |
c906108c | 211 | |
c5aa993b | 212 | compare_psymbols -- compare two partial symbols by name |
c906108c | 213 | |
c5aa993b | 214 | DESCRIPTION |
c906108c | 215 | |
c5aa993b JM |
216 | Given pointers to pointers to two partial symbol table entries, |
217 | compare them by name and return -N, 0, or +N (ala strcmp). | |
218 | Typically used by sorting routines like qsort(). | |
c906108c | 219 | |
c5aa993b | 220 | NOTES |
c906108c | 221 | |
c5aa993b JM |
222 | Does direct compare of first two characters before punting |
223 | and passing to strcmp for longer compares. Note that the | |
224 | original version had a bug whereby two null strings or two | |
225 | identically named one character strings would return the | |
226 | comparison of memory following the null byte. | |
c906108c SS |
227 | |
228 | */ | |
229 | ||
230 | static int | |
0cd64fe2 | 231 | compare_psymbols (const void *s1p, const void *s2p) |
c906108c | 232 | { |
fba7f19c EZ |
233 | register struct partial_symbol **s1, **s2; |
234 | register char *st1, *st2; | |
235 | ||
236 | s1 = (struct partial_symbol **) s1p; | |
237 | s2 = (struct partial_symbol **) s2p; | |
238 | st1 = SYMBOL_SOURCE_NAME (*s1); | |
239 | st2 = SYMBOL_SOURCE_NAME (*s2); | |
240 | ||
c906108c SS |
241 | |
242 | if ((st1[0] - st2[0]) || !st1[0]) | |
243 | { | |
244 | return (st1[0] - st2[0]); | |
245 | } | |
246 | else if ((st1[1] - st2[1]) || !st1[1]) | |
247 | { | |
248 | return (st1[1] - st2[1]); | |
249 | } | |
250 | else | |
251 | { | |
c5aa993b | 252 | return (strcmp (st1, st2)); |
c906108c SS |
253 | } |
254 | } | |
255 | ||
256 | void | |
fba45db2 | 257 | sort_pst_symbols (struct partial_symtab *pst) |
c906108c SS |
258 | { |
259 | /* Sort the global list; don't sort the static list */ | |
260 | ||
c5aa993b JM |
261 | qsort (pst->objfile->global_psymbols.list + pst->globals_offset, |
262 | pst->n_global_syms, sizeof (struct partial_symbol *), | |
c906108c SS |
263 | compare_psymbols); |
264 | } | |
265 | ||
266 | /* Call sort_block_syms to sort alphabetically the symbols of one block. */ | |
267 | ||
268 | void | |
fba45db2 | 269 | sort_block_syms (register struct block *b) |
c906108c SS |
270 | { |
271 | qsort (&BLOCK_SYM (b, 0), BLOCK_NSYMS (b), | |
272 | sizeof (struct symbol *), compare_symbols); | |
273 | } | |
274 | ||
275 | /* Call sort_symtab_syms to sort alphabetically | |
276 | the symbols of each block of one symtab. */ | |
277 | ||
278 | void | |
fba45db2 | 279 | sort_symtab_syms (register struct symtab *s) |
c906108c SS |
280 | { |
281 | register struct blockvector *bv; | |
282 | int nbl; | |
283 | int i; | |
284 | register struct block *b; | |
285 | ||
286 | if (s == 0) | |
287 | return; | |
288 | bv = BLOCKVECTOR (s); | |
289 | nbl = BLOCKVECTOR_NBLOCKS (bv); | |
290 | for (i = 0; i < nbl; i++) | |
291 | { | |
292 | b = BLOCKVECTOR_BLOCK (bv, i); | |
293 | if (BLOCK_SHOULD_SORT (b)) | |
294 | sort_block_syms (b); | |
295 | } | |
296 | } | |
297 | ||
298 | /* Make a null terminated copy of the string at PTR with SIZE characters in | |
299 | the obstack pointed to by OBSTACKP . Returns the address of the copy. | |
300 | Note that the string at PTR does not have to be null terminated, I.E. it | |
301 | may be part of a larger string and we are only saving a substring. */ | |
302 | ||
303 | char * | |
63ca651f | 304 | obsavestring (const char *ptr, int size, struct obstack *obstackp) |
c906108c SS |
305 | { |
306 | register char *p = (char *) obstack_alloc (obstackp, size + 1); | |
307 | /* Open-coded memcpy--saves function call time. These strings are usually | |
308 | short. FIXME: Is this really still true with a compiler that can | |
309 | inline memcpy? */ | |
310 | { | |
63ca651f | 311 | register const char *p1 = ptr; |
c906108c | 312 | register char *p2 = p; |
63ca651f | 313 | const char *end = ptr + size; |
c906108c SS |
314 | while (p1 != end) |
315 | *p2++ = *p1++; | |
316 | } | |
317 | p[size] = 0; | |
318 | return p; | |
319 | } | |
320 | ||
321 | /* Concatenate strings S1, S2 and S3; return the new string. Space is found | |
322 | in the obstack pointed to by OBSTACKP. */ | |
323 | ||
324 | char * | |
fba45db2 KB |
325 | obconcat (struct obstack *obstackp, const char *s1, const char *s2, |
326 | const char *s3) | |
c906108c SS |
327 | { |
328 | register int len = strlen (s1) + strlen (s2) + strlen (s3) + 1; | |
329 | register char *val = (char *) obstack_alloc (obstackp, len); | |
330 | strcpy (val, s1); | |
331 | strcat (val, s2); | |
332 | strcat (val, s3); | |
333 | return val; | |
334 | } | |
335 | ||
336 | /* True if we are nested inside psymtab_to_symtab. */ | |
337 | ||
338 | int currently_reading_symtab = 0; | |
339 | ||
340 | static void | |
fba45db2 | 341 | decrement_reading_symtab (void *dummy) |
c906108c SS |
342 | { |
343 | currently_reading_symtab--; | |
344 | } | |
345 | ||
346 | /* Get the symbol table that corresponds to a partial_symtab. | |
347 | This is fast after the first time you do it. In fact, there | |
348 | is an even faster macro PSYMTAB_TO_SYMTAB that does the fast | |
349 | case inline. */ | |
350 | ||
351 | struct symtab * | |
fba45db2 | 352 | psymtab_to_symtab (register struct partial_symtab *pst) |
c906108c SS |
353 | { |
354 | /* If it's been looked up before, return it. */ | |
355 | if (pst->symtab) | |
356 | return pst->symtab; | |
357 | ||
358 | /* If it has not yet been read in, read it. */ | |
359 | if (!pst->readin) | |
c5aa993b | 360 | { |
c906108c SS |
361 | struct cleanup *back_to = make_cleanup (decrement_reading_symtab, NULL); |
362 | currently_reading_symtab++; | |
363 | (*pst->read_symtab) (pst); | |
364 | do_cleanups (back_to); | |
365 | } | |
366 | ||
367 | return pst->symtab; | |
368 | } | |
369 | ||
370 | /* Initialize entry point information for this objfile. */ | |
371 | ||
372 | void | |
fba45db2 | 373 | init_entry_point_info (struct objfile *objfile) |
c906108c SS |
374 | { |
375 | /* Save startup file's range of PC addresses to help blockframe.c | |
376 | decide where the bottom of the stack is. */ | |
377 | ||
c5aa993b | 378 | if (bfd_get_file_flags (objfile->obfd) & EXEC_P) |
c906108c SS |
379 | { |
380 | /* Executable file -- record its entry point so we'll recognize | |
c5aa993b JM |
381 | the startup file because it contains the entry point. */ |
382 | objfile->ei.entry_point = bfd_get_start_address (objfile->obfd); | |
c906108c SS |
383 | } |
384 | else | |
385 | { | |
386 | /* Examination of non-executable.o files. Short-circuit this stuff. */ | |
c5aa993b | 387 | objfile->ei.entry_point = INVALID_ENTRY_POINT; |
c906108c | 388 | } |
c5aa993b JM |
389 | objfile->ei.entry_file_lowpc = INVALID_ENTRY_LOWPC; |
390 | objfile->ei.entry_file_highpc = INVALID_ENTRY_HIGHPC; | |
391 | objfile->ei.entry_func_lowpc = INVALID_ENTRY_LOWPC; | |
392 | objfile->ei.entry_func_highpc = INVALID_ENTRY_HIGHPC; | |
393 | objfile->ei.main_func_lowpc = INVALID_ENTRY_LOWPC; | |
394 | objfile->ei.main_func_highpc = INVALID_ENTRY_HIGHPC; | |
c906108c SS |
395 | } |
396 | ||
397 | /* Get current entry point address. */ | |
398 | ||
399 | CORE_ADDR | |
fba45db2 | 400 | entry_point_address (void) |
c906108c SS |
401 | { |
402 | return symfile_objfile ? symfile_objfile->ei.entry_point : 0; | |
403 | } | |
404 | ||
405 | /* Remember the lowest-addressed loadable section we've seen. | |
406 | This function is called via bfd_map_over_sections. | |
407 | ||
408 | In case of equal vmas, the section with the largest size becomes the | |
409 | lowest-addressed loadable section. | |
410 | ||
411 | If the vmas and sizes are equal, the last section is considered the | |
412 | lowest-addressed loadable section. */ | |
413 | ||
414 | void | |
4efb68b1 | 415 | find_lowest_section (bfd *abfd, asection *sect, void *obj) |
c906108c | 416 | { |
c5aa993b | 417 | asection **lowest = (asection **) obj; |
c906108c SS |
418 | |
419 | if (0 == (bfd_get_section_flags (abfd, sect) & SEC_LOAD)) | |
420 | return; | |
421 | if (!*lowest) | |
422 | *lowest = sect; /* First loadable section */ | |
423 | else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect)) | |
424 | *lowest = sect; /* A lower loadable section */ | |
425 | else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect) | |
426 | && (bfd_section_size (abfd, (*lowest)) | |
427 | <= bfd_section_size (abfd, sect))) | |
428 | *lowest = sect; | |
429 | } | |
430 | ||
62557bbc KB |
431 | |
432 | /* Build (allocate and populate) a section_addr_info struct from | |
433 | an existing section table. */ | |
434 | ||
435 | extern struct section_addr_info * | |
436 | build_section_addr_info_from_section_table (const struct section_table *start, | |
437 | const struct section_table *end) | |
438 | { | |
439 | struct section_addr_info *sap; | |
440 | const struct section_table *stp; | |
441 | int oidx; | |
442 | ||
443 | sap = xmalloc (sizeof (struct section_addr_info)); | |
444 | memset (sap, 0, sizeof (struct section_addr_info)); | |
445 | ||
446 | for (stp = start, oidx = 0; stp != end; stp++) | |
447 | { | |
fbd35540 MS |
448 | if (bfd_get_section_flags (stp->bfd, |
449 | stp->the_bfd_section) & (SEC_ALLOC | SEC_LOAD) | |
62557bbc KB |
450 | && oidx < MAX_SECTIONS) |
451 | { | |
452 | sap->other[oidx].addr = stp->addr; | |
fbd35540 MS |
453 | sap->other[oidx].name |
454 | = xstrdup (bfd_section_name (stp->bfd, stp->the_bfd_section)); | |
62557bbc KB |
455 | sap->other[oidx].sectindex = stp->the_bfd_section->index; |
456 | oidx++; | |
457 | } | |
458 | } | |
459 | ||
460 | return sap; | |
461 | } | |
462 | ||
463 | ||
464 | /* Free all memory allocated by build_section_addr_info_from_section_table. */ | |
465 | ||
466 | extern void | |
467 | free_section_addr_info (struct section_addr_info *sap) | |
468 | { | |
469 | int idx; | |
470 | ||
471 | for (idx = 0; idx < MAX_SECTIONS; idx++) | |
472 | if (sap->other[idx].name) | |
b8c9b27d KB |
473 | xfree (sap->other[idx].name); |
474 | xfree (sap); | |
62557bbc KB |
475 | } |
476 | ||
477 | ||
e8289572 JB |
478 | /* Initialize OBJFILE's sect_index_* members. */ |
479 | static void | |
480 | init_objfile_sect_indices (struct objfile *objfile) | |
c906108c | 481 | { |
e8289572 | 482 | asection *sect; |
c906108c | 483 | int i; |
e8289572 | 484 | |
b8fbeb18 EZ |
485 | sect = bfd_get_section_by_name (objfile->obfd, ".text"); |
486 | if (sect) | |
487 | objfile->sect_index_text = sect->index; | |
488 | ||
489 | sect = bfd_get_section_by_name (objfile->obfd, ".data"); | |
490 | if (sect) | |
491 | objfile->sect_index_data = sect->index; | |
492 | ||
493 | sect = bfd_get_section_by_name (objfile->obfd, ".bss"); | |
494 | if (sect) | |
495 | objfile->sect_index_bss = sect->index; | |
496 | ||
497 | sect = bfd_get_section_by_name (objfile->obfd, ".rodata"); | |
498 | if (sect) | |
499 | objfile->sect_index_rodata = sect->index; | |
500 | ||
bbcd32ad FF |
501 | /* This is where things get really weird... We MUST have valid |
502 | indices for the various sect_index_* members or gdb will abort. | |
503 | So if for example, there is no ".text" section, we have to | |
504 | accomodate that. Except when explicitly adding symbol files at | |
505 | some address, section_offsets contains nothing but zeros, so it | |
506 | doesn't matter which slot in section_offsets the individual | |
507 | sect_index_* members index into. So if they are all zero, it is | |
508 | safe to just point all the currently uninitialized indices to the | |
509 | first slot. */ | |
510 | ||
511 | for (i = 0; i < objfile->num_sections; i++) | |
512 | { | |
513 | if (ANOFFSET (objfile->section_offsets, i) != 0) | |
514 | { | |
515 | break; | |
516 | } | |
517 | } | |
518 | if (i == objfile->num_sections) | |
519 | { | |
520 | if (objfile->sect_index_text == -1) | |
521 | objfile->sect_index_text = 0; | |
522 | if (objfile->sect_index_data == -1) | |
523 | objfile->sect_index_data = 0; | |
524 | if (objfile->sect_index_bss == -1) | |
525 | objfile->sect_index_bss = 0; | |
526 | if (objfile->sect_index_rodata == -1) | |
527 | objfile->sect_index_rodata = 0; | |
528 | } | |
b8fbeb18 | 529 | } |
c906108c | 530 | |
e8289572 JB |
531 | |
532 | /* Parse the user's idea of an offset for dynamic linking, into our idea | |
533 | of how to represent it for fast symbol reading. This is the default | |
534 | version of the sym_fns.sym_offsets function for symbol readers that | |
535 | don't need to do anything special. It allocates a section_offsets table | |
536 | for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */ | |
537 | ||
538 | void | |
539 | default_symfile_offsets (struct objfile *objfile, | |
540 | struct section_addr_info *addrs) | |
541 | { | |
542 | int i; | |
543 | ||
544 | objfile->num_sections = SECT_OFF_MAX; | |
545 | objfile->section_offsets = (struct section_offsets *) | |
546 | obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS); | |
547 | memset (objfile->section_offsets, 0, SIZEOF_SECTION_OFFSETS); | |
548 | ||
549 | /* Now calculate offsets for section that were specified by the | |
550 | caller. */ | |
551 | for (i = 0; i < MAX_SECTIONS && addrs->other[i].name; i++) | |
552 | { | |
553 | struct other_sections *osp ; | |
554 | ||
555 | osp = &addrs->other[i] ; | |
556 | if (osp->addr == 0) | |
557 | continue; | |
558 | ||
559 | /* Record all sections in offsets */ | |
560 | /* The section_offsets in the objfile are here filled in using | |
561 | the BFD index. */ | |
562 | (objfile->section_offsets)->offsets[osp->sectindex] = osp->addr; | |
563 | } | |
564 | ||
565 | /* Remember the bfd indexes for the .text, .data, .bss and | |
566 | .rodata sections. */ | |
567 | init_objfile_sect_indices (objfile); | |
568 | } | |
569 | ||
570 | ||
c906108c SS |
571 | /* Process a symbol file, as either the main file or as a dynamically |
572 | loaded file. | |
573 | ||
96baa820 JM |
574 | OBJFILE is where the symbols are to be read from. |
575 | ||
7e8580c1 JB |
576 | ADDRS is the list of section load addresses. If the user has given |
577 | an 'add-symbol-file' command, then this is the list of offsets and | |
578 | addresses he or she provided as arguments to the command; or, if | |
579 | we're handling a shared library, these are the actual addresses the | |
580 | sections are loaded at, according to the inferior's dynamic linker | |
581 | (as gleaned by GDB's shared library code). We convert each address | |
582 | into an offset from the section VMA's as it appears in the object | |
583 | file, and then call the file's sym_offsets function to convert this | |
584 | into a format-specific offset table --- a `struct section_offsets'. | |
585 | If ADDRS is non-zero, OFFSETS must be zero. | |
586 | ||
587 | OFFSETS is a table of section offsets already in the right | |
588 | format-specific representation. NUM_OFFSETS is the number of | |
589 | elements present in OFFSETS->offsets. If OFFSETS is non-zero, we | |
590 | assume this is the proper table the call to sym_offsets described | |
591 | above would produce. Instead of calling sym_offsets, we just dump | |
592 | it right into objfile->section_offsets. (When we're re-reading | |
593 | symbols from an objfile, we don't have the original load address | |
594 | list any more; all we have is the section offset table.) If | |
595 | OFFSETS is non-zero, ADDRS must be zero. | |
96baa820 JM |
596 | |
597 | MAINLINE is nonzero if this is the main symbol file, or zero if | |
598 | it's an extra symbol file such as dynamically loaded code. | |
599 | ||
600 | VERBO is nonzero if the caller has printed a verbose message about | |
601 | the symbol reading (and complaints can be more terse about it). */ | |
c906108c SS |
602 | |
603 | void | |
7e8580c1 JB |
604 | syms_from_objfile (struct objfile *objfile, |
605 | struct section_addr_info *addrs, | |
606 | struct section_offsets *offsets, | |
607 | int num_offsets, | |
608 | int mainline, | |
609 | int verbo) | |
c906108c | 610 | { |
2acceee2 JM |
611 | asection *lower_sect; |
612 | asection *sect; | |
613 | CORE_ADDR lower_offset; | |
614 | struct section_addr_info local_addr; | |
c906108c | 615 | struct cleanup *old_chain; |
2acceee2 JM |
616 | int i; |
617 | ||
7e8580c1 | 618 | gdb_assert (! (addrs && offsets)); |
2acceee2 | 619 | |
7e8580c1 JB |
620 | /* If ADDRS and OFFSETS are both NULL, put together a dummy address |
621 | list. We now establish the convention that an addr of zero means | |
622 | no load address was specified. */ | |
623 | if (! addrs && ! offsets) | |
2acceee2 JM |
624 | { |
625 | memset (&local_addr, 0, sizeof (local_addr)); | |
626 | addrs = &local_addr; | |
627 | } | |
c906108c | 628 | |
7e8580c1 JB |
629 | /* Now either addrs or offsets is non-zero. */ |
630 | ||
c906108c SS |
631 | init_entry_point_info (objfile); |
632 | find_sym_fns (objfile); | |
633 | ||
75245b24 MS |
634 | if (objfile->sf == NULL) |
635 | return; /* No symbols. */ | |
636 | ||
c906108c SS |
637 | /* Make sure that partially constructed symbol tables will be cleaned up |
638 | if an error occurs during symbol reading. */ | |
74b7792f | 639 | old_chain = make_cleanup_free_objfile (objfile); |
c906108c | 640 | |
c5aa993b | 641 | if (mainline) |
c906108c SS |
642 | { |
643 | /* We will modify the main symbol table, make sure that all its users | |
c5aa993b | 644 | will be cleaned up if an error occurs during symbol reading. */ |
74b7792f | 645 | make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/); |
c906108c SS |
646 | |
647 | /* Since no error yet, throw away the old symbol table. */ | |
648 | ||
649 | if (symfile_objfile != NULL) | |
650 | { | |
651 | free_objfile (symfile_objfile); | |
652 | symfile_objfile = NULL; | |
653 | } | |
654 | ||
655 | /* Currently we keep symbols from the add-symbol-file command. | |
c5aa993b JM |
656 | If the user wants to get rid of them, they should do "symbol-file" |
657 | without arguments first. Not sure this is the best behavior | |
658 | (PR 2207). */ | |
c906108c | 659 | |
c5aa993b | 660 | (*objfile->sf->sym_new_init) (objfile); |
c906108c SS |
661 | } |
662 | ||
663 | /* Convert addr into an offset rather than an absolute address. | |
664 | We find the lowest address of a loaded segment in the objfile, | |
53a5351d | 665 | and assume that <addr> is where that got loaded. |
c906108c | 666 | |
53a5351d JM |
667 | We no longer warn if the lowest section is not a text segment (as |
668 | happens for the PA64 port. */ | |
e7cf9df1 | 669 | if (!mainline) |
c906108c | 670 | { |
2acceee2 JM |
671 | /* Find lowest loadable section to be used as starting point for |
672 | continguous sections. FIXME!! won't work without call to find | |
673 | .text first, but this assumes text is lowest section. */ | |
674 | lower_sect = bfd_get_section_by_name (objfile->obfd, ".text"); | |
675 | if (lower_sect == NULL) | |
c906108c | 676 | bfd_map_over_sections (objfile->obfd, find_lowest_section, |
4efb68b1 | 677 | &lower_sect); |
2acceee2 | 678 | if (lower_sect == NULL) |
c906108c SS |
679 | warning ("no loadable sections found in added symbol-file %s", |
680 | objfile->name); | |
b8fbeb18 EZ |
681 | else |
682 | if ((bfd_get_section_flags (objfile->obfd, lower_sect) & SEC_CODE) == 0) | |
683 | warning ("Lowest section in %s is %s at %s", | |
684 | objfile->name, | |
685 | bfd_section_name (objfile->obfd, lower_sect), | |
686 | paddr (bfd_section_vma (objfile->obfd, lower_sect))); | |
2acceee2 JM |
687 | if (lower_sect != NULL) |
688 | lower_offset = bfd_section_vma (objfile->obfd, lower_sect); | |
689 | else | |
690 | lower_offset = 0; | |
691 | ||
13de58df | 692 | /* Calculate offsets for the loadable sections. |
2acceee2 JM |
693 | FIXME! Sections must be in order of increasing loadable section |
694 | so that contiguous sections can use the lower-offset!!! | |
695 | ||
13de58df JB |
696 | Adjust offsets if the segments are not contiguous. |
697 | If the section is contiguous, its offset should be set to | |
2acceee2 JM |
698 | the offset of the highest loadable section lower than it |
699 | (the loadable section directly below it in memory). | |
700 | this_offset = lower_offset = lower_addr - lower_orig_addr */ | |
701 | ||
13de58df | 702 | /* Calculate offsets for sections. */ |
7e8580c1 JB |
703 | if (addrs) |
704 | for (i=0 ; i < MAX_SECTIONS && addrs->other[i].name; i++) | |
705 | { | |
706 | if (addrs->other[i].addr != 0) | |
707 | { | |
708 | sect = bfd_get_section_by_name (objfile->obfd, | |
709 | addrs->other[i].name); | |
710 | if (sect) | |
711 | { | |
712 | addrs->other[i].addr | |
713 | -= bfd_section_vma (objfile->obfd, sect); | |
714 | lower_offset = addrs->other[i].addr; | |
715 | /* This is the index used by BFD. */ | |
716 | addrs->other[i].sectindex = sect->index ; | |
717 | } | |
718 | else | |
719 | { | |
720 | warning ("section %s not found in %s", | |
721 | addrs->other[i].name, | |
722 | objfile->name); | |
723 | addrs->other[i].addr = 0; | |
724 | } | |
725 | } | |
726 | else | |
727 | addrs->other[i].addr = lower_offset; | |
728 | } | |
c906108c SS |
729 | } |
730 | ||
731 | /* Initialize symbol reading routines for this objfile, allow complaints to | |
732 | appear for this new file, and record how verbose to be, then do the | |
733 | initial symbol reading for this file. */ | |
734 | ||
c5aa993b | 735 | (*objfile->sf->sym_init) (objfile); |
b9caf505 | 736 | clear_complaints (&symfile_complaints, 1, verbo); |
c906108c | 737 | |
7e8580c1 JB |
738 | if (addrs) |
739 | (*objfile->sf->sym_offsets) (objfile, addrs); | |
740 | else | |
741 | { | |
742 | size_t size = SIZEOF_N_SECTION_OFFSETS (num_offsets); | |
743 | ||
744 | /* Just copy in the offset table directly as given to us. */ | |
745 | objfile->num_sections = num_offsets; | |
746 | objfile->section_offsets | |
747 | = ((struct section_offsets *) | |
748 | obstack_alloc (&objfile->psymbol_obstack, size)); | |
749 | memcpy (objfile->section_offsets, offsets, size); | |
750 | ||
751 | init_objfile_sect_indices (objfile); | |
752 | } | |
c906108c SS |
753 | |
754 | #ifndef IBM6000_TARGET | |
755 | /* This is a SVR4/SunOS specific hack, I think. In any event, it | |
756 | screws RS/6000. sym_offsets should be doing this sort of thing, | |
757 | because it knows the mapping between bfd sections and | |
758 | section_offsets. */ | |
759 | /* This is a hack. As far as I can tell, section offsets are not | |
760 | target dependent. They are all set to addr with a couple of | |
761 | exceptions. The exceptions are sysvr4 shared libraries, whose | |
762 | offsets are kept in solib structures anyway and rs6000 xcoff | |
763 | which handles shared libraries in a completely unique way. | |
764 | ||
765 | Section offsets are built similarly, except that they are built | |
766 | by adding addr in all cases because there is no clear mapping | |
767 | from section_offsets into actual sections. Note that solib.c | |
96baa820 | 768 | has a different algorithm for finding section offsets. |
c906108c SS |
769 | |
770 | These should probably all be collapsed into some target | |
771 | independent form of shared library support. FIXME. */ | |
772 | ||
2acceee2 | 773 | if (addrs) |
c906108c SS |
774 | { |
775 | struct obj_section *s; | |
776 | ||
2acceee2 JM |
777 | /* Map section offsets in "addr" back to the object's |
778 | sections by comparing the section names with bfd's | |
779 | section names. Then adjust the section address by | |
780 | the offset. */ /* for gdb/13815 */ | |
781 | ||
96baa820 | 782 | ALL_OBJFILE_OSECTIONS (objfile, s) |
c906108c | 783 | { |
2acceee2 JM |
784 | CORE_ADDR s_addr = 0; |
785 | int i; | |
786 | ||
62557bbc KB |
787 | for (i = 0; |
788 | !s_addr && i < MAX_SECTIONS && addrs->other[i].name; | |
789 | i++) | |
fbd35540 MS |
790 | if (strcmp (bfd_section_name (s->objfile->obfd, |
791 | s->the_bfd_section), | |
792 | addrs->other[i].name) == 0) | |
2acceee2 JM |
793 | s_addr = addrs->other[i].addr; /* end added for gdb/13815 */ |
794 | ||
c906108c | 795 | s->addr -= s->offset; |
2acceee2 | 796 | s->addr += s_addr; |
c906108c | 797 | s->endaddr -= s->offset; |
2acceee2 JM |
798 | s->endaddr += s_addr; |
799 | s->offset += s_addr; | |
c906108c SS |
800 | } |
801 | } | |
802 | #endif /* not IBM6000_TARGET */ | |
803 | ||
96baa820 | 804 | (*objfile->sf->sym_read) (objfile, mainline); |
c906108c SS |
805 | |
806 | if (!have_partial_symbols () && !have_full_symbols ()) | |
807 | { | |
808 | wrap_here (""); | |
809 | printf_filtered ("(no debugging symbols found)..."); | |
810 | wrap_here (""); | |
811 | } | |
812 | ||
813 | /* Don't allow char * to have a typename (else would get caddr_t). | |
814 | Ditto void *. FIXME: Check whether this is now done by all the | |
815 | symbol readers themselves (many of them now do), and if so remove | |
816 | it from here. */ | |
817 | ||
818 | TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0; | |
819 | TYPE_NAME (lookup_pointer_type (builtin_type_void)) = 0; | |
820 | ||
821 | /* Mark the objfile has having had initial symbol read attempted. Note | |
822 | that this does not mean we found any symbols... */ | |
823 | ||
c5aa993b | 824 | objfile->flags |= OBJF_SYMS; |
c906108c SS |
825 | |
826 | /* Discard cleanups as symbol reading was successful. */ | |
827 | ||
828 | discard_cleanups (old_chain); | |
829 | ||
96baa820 | 830 | /* Call this after reading in a new symbol table to give target |
38c2ef12 | 831 | dependent code a crack at the new symbols. For instance, this |
96baa820 JM |
832 | could be used to update the values of target-specific symbols GDB |
833 | needs to keep track of (such as _sigtramp, or whatever). */ | |
c906108c SS |
834 | |
835 | TARGET_SYMFILE_POSTREAD (objfile); | |
836 | } | |
837 | ||
838 | /* Perform required actions after either reading in the initial | |
839 | symbols for a new objfile, or mapping in the symbols from a reusable | |
840 | objfile. */ | |
c5aa993b | 841 | |
c906108c | 842 | void |
fba45db2 | 843 | new_symfile_objfile (struct objfile *objfile, int mainline, int verbo) |
c906108c SS |
844 | { |
845 | ||
846 | /* If this is the main symbol file we have to clean up all users of the | |
847 | old main symbol file. Otherwise it is sufficient to fixup all the | |
848 | breakpoints that may have been redefined by this symbol file. */ | |
849 | if (mainline) | |
850 | { | |
851 | /* OK, make it the "real" symbol file. */ | |
852 | symfile_objfile = objfile; | |
853 | ||
854 | clear_symtab_users (); | |
855 | } | |
856 | else | |
857 | { | |
858 | breakpoint_re_set (); | |
859 | } | |
860 | ||
861 | /* We're done reading the symbol file; finish off complaints. */ | |
b9caf505 | 862 | clear_complaints (&symfile_complaints, 0, verbo); |
c906108c SS |
863 | } |
864 | ||
865 | /* Process a symbol file, as either the main file or as a dynamically | |
866 | loaded file. | |
867 | ||
868 | NAME is the file name (which will be tilde-expanded and made | |
869 | absolute herein) (but we don't free or modify NAME itself). | |
7904e09f JB |
870 | |
871 | FROM_TTY says how verbose to be. | |
872 | ||
873 | MAINLINE specifies whether this is the main symbol file, or whether | |
874 | it's an extra symbol file such as dynamically loaded code. | |
875 | ||
876 | ADDRS, OFFSETS, and NUM_OFFSETS are as described for | |
877 | syms_from_objfile, above. ADDRS is ignored when MAINLINE is | |
878 | non-zero. | |
c906108c | 879 | |
c906108c SS |
880 | Upon success, returns a pointer to the objfile that was added. |
881 | Upon failure, jumps back to command level (never returns). */ | |
7904e09f JB |
882 | static struct objfile * |
883 | symbol_file_add_with_addrs_or_offsets (char *name, int from_tty, | |
884 | struct section_addr_info *addrs, | |
885 | struct section_offsets *offsets, | |
886 | int num_offsets, | |
887 | int mainline, int flags) | |
c906108c SS |
888 | { |
889 | struct objfile *objfile; | |
890 | struct partial_symtab *psymtab; | |
891 | bfd *abfd; | |
892 | ||
893 | /* Open a bfd for the file, and give user a chance to burp if we'd be | |
894 | interactively wiping out any existing symbols. */ | |
895 | ||
896 | abfd = symfile_bfd_open (name); | |
897 | ||
898 | if ((have_full_symbols () || have_partial_symbols ()) | |
899 | && mainline | |
900 | && from_tty | |
901 | && !query ("Load new symbol table from \"%s\"? ", name)) | |
c5aa993b | 902 | error ("Not confirmed."); |
c906108c | 903 | |
2df3850c | 904 | objfile = allocate_objfile (abfd, flags); |
c906108c SS |
905 | |
906 | /* If the objfile uses a mapped symbol file, and we have a psymtab for | |
907 | it, then skip reading any symbols at this time. */ | |
908 | ||
c5aa993b | 909 | if ((objfile->flags & OBJF_MAPPED) && (objfile->flags & OBJF_SYMS)) |
c906108c SS |
910 | { |
911 | /* We mapped in an existing symbol table file that already has had | |
c5aa993b JM |
912 | initial symbol reading performed, so we can skip that part. Notify |
913 | the user that instead of reading the symbols, they have been mapped. | |
914 | */ | |
c906108c SS |
915 | if (from_tty || info_verbose) |
916 | { | |
917 | printf_filtered ("Mapped symbols for %s...", name); | |
918 | wrap_here (""); | |
919 | gdb_flush (gdb_stdout); | |
920 | } | |
921 | init_entry_point_info (objfile); | |
922 | find_sym_fns (objfile); | |
923 | } | |
924 | else | |
925 | { | |
926 | /* We either created a new mapped symbol table, mapped an existing | |
c5aa993b JM |
927 | symbol table file which has not had initial symbol reading |
928 | performed, or need to read an unmapped symbol table. */ | |
c906108c SS |
929 | if (from_tty || info_verbose) |
930 | { | |
931 | if (pre_add_symbol_hook) | |
932 | pre_add_symbol_hook (name); | |
933 | else | |
934 | { | |
935 | printf_filtered ("Reading symbols from %s...", name); | |
936 | wrap_here (""); | |
937 | gdb_flush (gdb_stdout); | |
938 | } | |
939 | } | |
7904e09f JB |
940 | syms_from_objfile (objfile, addrs, offsets, num_offsets, |
941 | mainline, from_tty); | |
c906108c SS |
942 | } |
943 | ||
944 | /* We now have at least a partial symbol table. Check to see if the | |
945 | user requested that all symbols be read on initial access via either | |
946 | the gdb startup command line or on a per symbol file basis. Expand | |
947 | all partial symbol tables for this objfile if so. */ | |
948 | ||
2acceee2 | 949 | if ((flags & OBJF_READNOW) || readnow_symbol_files) |
c906108c SS |
950 | { |
951 | if (from_tty || info_verbose) | |
952 | { | |
953 | printf_filtered ("expanding to full symbols..."); | |
954 | wrap_here (""); | |
955 | gdb_flush (gdb_stdout); | |
956 | } | |
957 | ||
c5aa993b | 958 | for (psymtab = objfile->psymtabs; |
c906108c | 959 | psymtab != NULL; |
c5aa993b | 960 | psymtab = psymtab->next) |
c906108c SS |
961 | { |
962 | psymtab_to_symtab (psymtab); | |
963 | } | |
964 | } | |
965 | ||
966 | if (from_tty || info_verbose) | |
967 | { | |
968 | if (post_add_symbol_hook) | |
c5aa993b | 969 | post_add_symbol_hook (); |
c906108c | 970 | else |
c5aa993b JM |
971 | { |
972 | printf_filtered ("done.\n"); | |
c5aa993b | 973 | } |
c906108c SS |
974 | } |
975 | ||
481d0f41 JB |
976 | /* We print some messages regardless of whether 'from_tty || |
977 | info_verbose' is true, so make sure they go out at the right | |
978 | time. */ | |
979 | gdb_flush (gdb_stdout); | |
980 | ||
109f874e MS |
981 | if (objfile->sf == NULL) |
982 | return objfile; /* No symbols. */ | |
983 | ||
c906108c SS |
984 | new_symfile_objfile (objfile, mainline, from_tty); |
985 | ||
11cf8741 JM |
986 | if (target_new_objfile_hook) |
987 | target_new_objfile_hook (objfile); | |
c906108c SS |
988 | |
989 | return (objfile); | |
990 | } | |
991 | ||
7904e09f JB |
992 | |
993 | /* Process a symbol file, as either the main file or as a dynamically | |
994 | loaded file. See symbol_file_add_with_addrs_or_offsets's comments | |
995 | for details. */ | |
996 | struct objfile * | |
997 | symbol_file_add (char *name, int from_tty, struct section_addr_info *addrs, | |
998 | int mainline, int flags) | |
999 | { | |
1000 | return symbol_file_add_with_addrs_or_offsets (name, from_tty, addrs, 0, 0, | |
1001 | mainline, flags); | |
1002 | } | |
1003 | ||
1004 | ||
d7db6da9 FN |
1005 | /* Call symbol_file_add() with default values and update whatever is |
1006 | affected by the loading of a new main(). | |
1007 | Used when the file is supplied in the gdb command line | |
1008 | and by some targets with special loading requirements. | |
1009 | The auxiliary function, symbol_file_add_main_1(), has the flags | |
1010 | argument for the switches that can only be specified in the symbol_file | |
1011 | command itself. */ | |
1adeb98a FN |
1012 | |
1013 | void | |
1014 | symbol_file_add_main (char *args, int from_tty) | |
1015 | { | |
d7db6da9 FN |
1016 | symbol_file_add_main_1 (args, from_tty, 0); |
1017 | } | |
1018 | ||
1019 | static void | |
1020 | symbol_file_add_main_1 (char *args, int from_tty, int flags) | |
1021 | { | |
1022 | symbol_file_add (args, from_tty, NULL, 1, flags); | |
1023 | ||
1024 | #ifdef HPUXHPPA | |
1025 | RESET_HP_UX_GLOBALS (); | |
1026 | #endif | |
1027 | ||
1028 | /* Getting new symbols may change our opinion about | |
1029 | what is frameless. */ | |
1030 | reinit_frame_cache (); | |
1031 | ||
1032 | set_initial_language (); | |
1adeb98a FN |
1033 | } |
1034 | ||
1035 | void | |
1036 | symbol_file_clear (int from_tty) | |
1037 | { | |
1038 | if ((have_full_symbols () || have_partial_symbols ()) | |
1039 | && from_tty | |
1040 | && !query ("Discard symbol table from `%s'? ", | |
1041 | symfile_objfile->name)) | |
1042 | error ("Not confirmed."); | |
1043 | free_all_objfiles (); | |
1044 | ||
1045 | /* solib descriptors may have handles to objfiles. Since their | |
1046 | storage has just been released, we'd better wipe the solib | |
1047 | descriptors as well. | |
1048 | */ | |
1049 | #if defined(SOLIB_RESTART) | |
1050 | SOLIB_RESTART (); | |
1051 | #endif | |
1052 | ||
1053 | symfile_objfile = NULL; | |
1054 | if (from_tty) | |
1055 | printf_unfiltered ("No symbol file now.\n"); | |
1056 | #ifdef HPUXHPPA | |
1057 | RESET_HP_UX_GLOBALS (); | |
1058 | #endif | |
1059 | } | |
1060 | ||
c906108c SS |
1061 | /* This is the symbol-file command. Read the file, analyze its |
1062 | symbols, and add a struct symtab to a symtab list. The syntax of | |
1063 | the command is rather bizarre--(1) buildargv implements various | |
1064 | quoting conventions which are undocumented and have little or | |
1065 | nothing in common with the way things are quoted (or not quoted) | |
1066 | elsewhere in GDB, (2) options are used, which are not generally | |
1067 | used in GDB (perhaps "set mapped on", "set readnow on" would be | |
1068 | better), (3) the order of options matters, which is contrary to GNU | |
1069 | conventions (because it is confusing and inconvenient). */ | |
4da95fc4 EZ |
1070 | /* Note: ezannoni 2000-04-17. This function used to have support for |
1071 | rombug (see remote-os9k.c). It consisted of a call to target_link() | |
1072 | (target.c) to get the address of the text segment from the target, | |
1073 | and pass that to symbol_file_add(). This is no longer supported. */ | |
c906108c SS |
1074 | |
1075 | void | |
fba45db2 | 1076 | symbol_file_command (char *args, int from_tty) |
c906108c SS |
1077 | { |
1078 | char **argv; | |
1079 | char *name = NULL; | |
c906108c | 1080 | struct cleanup *cleanups; |
2df3850c | 1081 | int flags = OBJF_USERLOADED; |
c906108c SS |
1082 | |
1083 | dont_repeat (); | |
1084 | ||
1085 | if (args == NULL) | |
1086 | { | |
1adeb98a | 1087 | symbol_file_clear (from_tty); |
c906108c SS |
1088 | } |
1089 | else | |
1090 | { | |
1091 | if ((argv = buildargv (args)) == NULL) | |
1092 | { | |
1093 | nomem (0); | |
1094 | } | |
7a292a7a | 1095 | cleanups = make_cleanup_freeargv (argv); |
c906108c SS |
1096 | while (*argv != NULL) |
1097 | { | |
1098 | if (STREQ (*argv, "-mapped")) | |
4da95fc4 EZ |
1099 | flags |= OBJF_MAPPED; |
1100 | else | |
1101 | if (STREQ (*argv, "-readnow")) | |
2acceee2 | 1102 | flags |= OBJF_READNOW; |
4da95fc4 EZ |
1103 | else |
1104 | if (**argv == '-') | |
1105 | error ("unknown option `%s'", *argv); | |
c5aa993b | 1106 | else |
c5aa993b | 1107 | { |
4da95fc4 | 1108 | name = *argv; |
c906108c | 1109 | |
d7db6da9 | 1110 | symbol_file_add_main_1 (name, from_tty, flags); |
4da95fc4 | 1111 | } |
c906108c SS |
1112 | argv++; |
1113 | } | |
1114 | ||
1115 | if (name == NULL) | |
1116 | { | |
1117 | error ("no symbol file name was specified"); | |
1118 | } | |
c906108c SS |
1119 | do_cleanups (cleanups); |
1120 | } | |
1121 | } | |
1122 | ||
1123 | /* Set the initial language. | |
1124 | ||
1125 | A better solution would be to record the language in the psymtab when reading | |
1126 | partial symbols, and then use it (if known) to set the language. This would | |
1127 | be a win for formats that encode the language in an easily discoverable place, | |
1128 | such as DWARF. For stabs, we can jump through hoops looking for specially | |
1129 | named symbols or try to intuit the language from the specific type of stabs | |
1130 | we find, but we can't do that until later when we read in full symbols. | |
1131 | FIXME. */ | |
1132 | ||
1133 | static void | |
fba45db2 | 1134 | set_initial_language (void) |
c906108c SS |
1135 | { |
1136 | struct partial_symtab *pst; | |
c5aa993b | 1137 | enum language lang = language_unknown; |
c906108c SS |
1138 | |
1139 | pst = find_main_psymtab (); | |
1140 | if (pst != NULL) | |
1141 | { | |
c5aa993b | 1142 | if (pst->filename != NULL) |
c906108c | 1143 | { |
c5aa993b JM |
1144 | lang = deduce_language_from_filename (pst->filename); |
1145 | } | |
c906108c SS |
1146 | if (lang == language_unknown) |
1147 | { | |
c5aa993b JM |
1148 | /* Make C the default language */ |
1149 | lang = language_c; | |
c906108c SS |
1150 | } |
1151 | set_language (lang); | |
1152 | expected_language = current_language; /* Don't warn the user */ | |
1153 | } | |
1154 | } | |
1155 | ||
1156 | /* Open file specified by NAME and hand it off to BFD for preliminary | |
1157 | analysis. Result is a newly initialized bfd *, which includes a newly | |
1158 | malloc'd` copy of NAME (tilde-expanded and made absolute). | |
1159 | In case of trouble, error() is called. */ | |
1160 | ||
1161 | bfd * | |
fba45db2 | 1162 | symfile_bfd_open (char *name) |
c906108c SS |
1163 | { |
1164 | bfd *sym_bfd; | |
1165 | int desc; | |
1166 | char *absolute_name; | |
1167 | ||
1168 | ||
1169 | ||
1170 | name = tilde_expand (name); /* Returns 1st new malloc'd copy */ | |
1171 | ||
1172 | /* Look down path for it, allocate 2nd new malloc'd copy. */ | |
1173 | desc = openp (getenv ("PATH"), 1, name, O_RDONLY | O_BINARY, 0, &absolute_name); | |
608506ed | 1174 | #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__) |
c906108c SS |
1175 | if (desc < 0) |
1176 | { | |
1177 | char *exename = alloca (strlen (name) + 5); | |
1178 | strcat (strcpy (exename, name), ".exe"); | |
1179 | desc = openp (getenv ("PATH"), 1, exename, O_RDONLY | O_BINARY, | |
c5aa993b | 1180 | 0, &absolute_name); |
c906108c SS |
1181 | } |
1182 | #endif | |
1183 | if (desc < 0) | |
1184 | { | |
b8c9b27d | 1185 | make_cleanup (xfree, name); |
c906108c SS |
1186 | perror_with_name (name); |
1187 | } | |
b8c9b27d | 1188 | xfree (name); /* Free 1st new malloc'd copy */ |
c906108c | 1189 | name = absolute_name; /* Keep 2nd malloc'd copy in bfd */ |
c5aa993b | 1190 | /* It'll be freed in free_objfile(). */ |
c906108c SS |
1191 | |
1192 | sym_bfd = bfd_fdopenr (name, gnutarget, desc); | |
1193 | if (!sym_bfd) | |
1194 | { | |
1195 | close (desc); | |
b8c9b27d | 1196 | make_cleanup (xfree, name); |
c906108c SS |
1197 | error ("\"%s\": can't open to read symbols: %s.", name, |
1198 | bfd_errmsg (bfd_get_error ())); | |
1199 | } | |
81a9a963 | 1200 | sym_bfd->cacheable = 1; |
c906108c SS |
1201 | |
1202 | if (!bfd_check_format (sym_bfd, bfd_object)) | |
1203 | { | |
1204 | /* FIXME: should be checking for errors from bfd_close (for one thing, | |
c5aa993b JM |
1205 | on error it does not free all the storage associated with the |
1206 | bfd). */ | |
c906108c | 1207 | bfd_close (sym_bfd); /* This also closes desc */ |
b8c9b27d | 1208 | make_cleanup (xfree, name); |
c906108c SS |
1209 | error ("\"%s\": can't read symbols: %s.", name, |
1210 | bfd_errmsg (bfd_get_error ())); | |
1211 | } | |
1212 | return (sym_bfd); | |
1213 | } | |
1214 | ||
0e931cf0 JB |
1215 | /* Return the section index for the given section name. Return -1 if |
1216 | the section was not found. */ | |
1217 | int | |
1218 | get_section_index (struct objfile *objfile, char *section_name) | |
1219 | { | |
1220 | asection *sect = bfd_get_section_by_name (objfile->obfd, section_name); | |
1221 | if (sect) | |
1222 | return sect->index; | |
1223 | else | |
1224 | return -1; | |
1225 | } | |
1226 | ||
c906108c SS |
1227 | /* Link a new symtab_fns into the global symtab_fns list. Called on gdb |
1228 | startup by the _initialize routine in each object file format reader, | |
1229 | to register information about each format the the reader is prepared | |
1230 | to handle. */ | |
1231 | ||
1232 | void | |
fba45db2 | 1233 | add_symtab_fns (struct sym_fns *sf) |
c906108c SS |
1234 | { |
1235 | sf->next = symtab_fns; | |
1236 | symtab_fns = sf; | |
1237 | } | |
1238 | ||
1239 | ||
1240 | /* Initialize to read symbols from the symbol file sym_bfd. It either | |
1241 | returns or calls error(). The result is an initialized struct sym_fns | |
1242 | in the objfile structure, that contains cached information about the | |
1243 | symbol file. */ | |
1244 | ||
1245 | static void | |
fba45db2 | 1246 | find_sym_fns (struct objfile *objfile) |
c906108c SS |
1247 | { |
1248 | struct sym_fns *sf; | |
c5aa993b JM |
1249 | enum bfd_flavour our_flavour = bfd_get_flavour (objfile->obfd); |
1250 | char *our_target = bfd_get_target (objfile->obfd); | |
c906108c | 1251 | |
75245b24 MS |
1252 | if (our_flavour == bfd_target_srec_flavour |
1253 | || our_flavour == bfd_target_ihex_flavour | |
1254 | || our_flavour == bfd_target_tekhex_flavour) | |
1255 | return; /* No symbols. */ | |
1256 | ||
c906108c SS |
1257 | /* Special kludge for apollo. See dstread.c. */ |
1258 | if (STREQN (our_target, "apollo", 6)) | |
c5aa993b | 1259 | our_flavour = (enum bfd_flavour) -2; |
c906108c | 1260 | |
c5aa993b | 1261 | for (sf = symtab_fns; sf != NULL; sf = sf->next) |
c906108c | 1262 | { |
c5aa993b | 1263 | if (our_flavour == sf->sym_flavour) |
c906108c | 1264 | { |
c5aa993b | 1265 | objfile->sf = sf; |
c906108c SS |
1266 | return; |
1267 | } | |
1268 | } | |
1269 | error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.", | |
c5aa993b | 1270 | bfd_get_target (objfile->obfd)); |
c906108c SS |
1271 | } |
1272 | \f | |
1273 | /* This function runs the load command of our current target. */ | |
1274 | ||
1275 | static void | |
fba45db2 | 1276 | load_command (char *arg, int from_tty) |
c906108c SS |
1277 | { |
1278 | if (arg == NULL) | |
1279 | arg = get_exec_file (1); | |
1280 | target_load (arg, from_tty); | |
2889e661 JB |
1281 | |
1282 | /* After re-loading the executable, we don't really know which | |
1283 | overlays are mapped any more. */ | |
1284 | overlay_cache_invalid = 1; | |
c906108c SS |
1285 | } |
1286 | ||
1287 | /* This version of "load" should be usable for any target. Currently | |
1288 | it is just used for remote targets, not inftarg.c or core files, | |
1289 | on the theory that only in that case is it useful. | |
1290 | ||
1291 | Avoiding xmodem and the like seems like a win (a) because we don't have | |
1292 | to worry about finding it, and (b) On VMS, fork() is very slow and so | |
1293 | we don't want to run a subprocess. On the other hand, I'm not sure how | |
1294 | performance compares. */ | |
917317f4 JM |
1295 | |
1296 | static int download_write_size = 512; | |
1297 | static int validate_download = 0; | |
1298 | ||
e4f9b4d5 MS |
1299 | /* Callback service function for generic_load (bfd_map_over_sections). */ |
1300 | ||
1301 | static void | |
1302 | add_section_size_callback (bfd *abfd, asection *asec, void *data) | |
1303 | { | |
1304 | bfd_size_type *sum = data; | |
1305 | ||
1306 | *sum += bfd_get_section_size_before_reloc (asec); | |
1307 | } | |
1308 | ||
1309 | /* Opaque data for load_section_callback. */ | |
1310 | struct load_section_data { | |
1311 | unsigned long load_offset; | |
1312 | unsigned long write_count; | |
1313 | unsigned long data_count; | |
1314 | bfd_size_type total_size; | |
1315 | }; | |
1316 | ||
1317 | /* Callback service function for generic_load (bfd_map_over_sections). */ | |
1318 | ||
1319 | static void | |
1320 | load_section_callback (bfd *abfd, asection *asec, void *data) | |
1321 | { | |
1322 | struct load_section_data *args = data; | |
1323 | ||
1324 | if (bfd_get_section_flags (abfd, asec) & SEC_LOAD) | |
1325 | { | |
1326 | bfd_size_type size = bfd_get_section_size_before_reloc (asec); | |
1327 | if (size > 0) | |
1328 | { | |
1329 | char *buffer; | |
1330 | struct cleanup *old_chain; | |
1331 | CORE_ADDR lma = bfd_section_lma (abfd, asec) + args->load_offset; | |
1332 | bfd_size_type block_size; | |
1333 | int err; | |
1334 | const char *sect_name = bfd_get_section_name (abfd, asec); | |
1335 | bfd_size_type sent; | |
1336 | ||
1337 | if (download_write_size > 0 && size > download_write_size) | |
1338 | block_size = download_write_size; | |
1339 | else | |
1340 | block_size = size; | |
1341 | ||
1342 | buffer = xmalloc (size); | |
1343 | old_chain = make_cleanup (xfree, buffer); | |
1344 | ||
1345 | /* Is this really necessary? I guess it gives the user something | |
1346 | to look at during a long download. */ | |
e4f9b4d5 MS |
1347 | ui_out_message (uiout, 0, "Loading section %s, size 0x%s lma 0x%s\n", |
1348 | sect_name, paddr_nz (size), paddr_nz (lma)); | |
e4f9b4d5 MS |
1349 | |
1350 | bfd_get_section_contents (abfd, asec, buffer, 0, size); | |
1351 | ||
1352 | sent = 0; | |
1353 | do | |
1354 | { | |
1355 | int len; | |
1356 | bfd_size_type this_transfer = size - sent; | |
1357 | ||
1358 | if (this_transfer >= block_size) | |
1359 | this_transfer = block_size; | |
1360 | len = target_write_memory_partial (lma, buffer, | |
1361 | this_transfer, &err); | |
1362 | if (err) | |
1363 | break; | |
1364 | if (validate_download) | |
1365 | { | |
1366 | /* Broken memories and broken monitors manifest | |
1367 | themselves here when bring new computers to | |
1368 | life. This doubles already slow downloads. */ | |
1369 | /* NOTE: cagney/1999-10-18: A more efficient | |
1370 | implementation might add a verify_memory() | |
1371 | method to the target vector and then use | |
1372 | that. remote.c could implement that method | |
1373 | using the ``qCRC'' packet. */ | |
1374 | char *check = xmalloc (len); | |
1375 | struct cleanup *verify_cleanups = | |
1376 | make_cleanup (xfree, check); | |
1377 | ||
1378 | if (target_read_memory (lma, check, len) != 0) | |
1379 | error ("Download verify read failed at 0x%s", | |
1380 | paddr (lma)); | |
1381 | if (memcmp (buffer, check, len) != 0) | |
1382 | error ("Download verify compare failed at 0x%s", | |
1383 | paddr (lma)); | |
1384 | do_cleanups (verify_cleanups); | |
1385 | } | |
1386 | args->data_count += len; | |
1387 | lma += len; | |
1388 | buffer += len; | |
1389 | args->write_count += 1; | |
1390 | sent += len; | |
1391 | if (quit_flag | |
1392 | || (ui_load_progress_hook != NULL | |
1393 | && ui_load_progress_hook (sect_name, sent))) | |
1394 | error ("Canceled the download"); | |
1395 | ||
1396 | if (show_load_progress != NULL) | |
1397 | show_load_progress (sect_name, sent, size, | |
1398 | args->data_count, args->total_size); | |
1399 | } | |
1400 | while (sent < size); | |
1401 | ||
1402 | if (err != 0) | |
1403 | error ("Memory access error while loading section %s.", sect_name); | |
1404 | ||
1405 | do_cleanups (old_chain); | |
1406 | } | |
1407 | } | |
1408 | } | |
1409 | ||
c906108c | 1410 | void |
917317f4 | 1411 | generic_load (char *args, int from_tty) |
c906108c | 1412 | { |
c906108c SS |
1413 | asection *s; |
1414 | bfd *loadfile_bfd; | |
1415 | time_t start_time, end_time; /* Start and end times of download */ | |
917317f4 JM |
1416 | char *filename; |
1417 | struct cleanup *old_cleanups; | |
1418 | char *offptr; | |
e4f9b4d5 MS |
1419 | struct load_section_data cbdata; |
1420 | CORE_ADDR entry; | |
1421 | ||
1422 | cbdata.load_offset = 0; /* Offset to add to vma for each section. */ | |
1423 | cbdata.write_count = 0; /* Number of writes needed. */ | |
1424 | cbdata.data_count = 0; /* Number of bytes written to target memory. */ | |
1425 | cbdata.total_size = 0; /* Total size of all bfd sectors. */ | |
917317f4 JM |
1426 | |
1427 | /* Parse the input argument - the user can specify a load offset as | |
1428 | a second argument. */ | |
1429 | filename = xmalloc (strlen (args) + 1); | |
b8c9b27d | 1430 | old_cleanups = make_cleanup (xfree, filename); |
917317f4 JM |
1431 | strcpy (filename, args); |
1432 | offptr = strchr (filename, ' '); | |
1433 | if (offptr != NULL) | |
1434 | { | |
1435 | char *endptr; | |
ba5f2f8a | 1436 | |
e4f9b4d5 | 1437 | cbdata.load_offset = strtoul (offptr, &endptr, 0); |
917317f4 JM |
1438 | if (offptr == endptr) |
1439 | error ("Invalid download offset:%s\n", offptr); | |
1440 | *offptr = '\0'; | |
1441 | } | |
c906108c | 1442 | else |
e4f9b4d5 | 1443 | cbdata.load_offset = 0; |
c906108c | 1444 | |
917317f4 | 1445 | /* Open the file for loading. */ |
c906108c SS |
1446 | loadfile_bfd = bfd_openr (filename, gnutarget); |
1447 | if (loadfile_bfd == NULL) | |
1448 | { | |
1449 | perror_with_name (filename); | |
1450 | return; | |
1451 | } | |
917317f4 | 1452 | |
c906108c SS |
1453 | /* FIXME: should be checking for errors from bfd_close (for one thing, |
1454 | on error it does not free all the storage associated with the | |
1455 | bfd). */ | |
5c65bbb6 | 1456 | make_cleanup_bfd_close (loadfile_bfd); |
c906108c | 1457 | |
c5aa993b | 1458 | if (!bfd_check_format (loadfile_bfd, bfd_object)) |
c906108c SS |
1459 | { |
1460 | error ("\"%s\" is not an object file: %s", filename, | |
1461 | bfd_errmsg (bfd_get_error ())); | |
1462 | } | |
c5aa993b | 1463 | |
e4f9b4d5 MS |
1464 | bfd_map_over_sections (loadfile_bfd, add_section_size_callback, |
1465 | (void *) &cbdata.total_size); | |
c2d11a7d | 1466 | |
c906108c SS |
1467 | start_time = time (NULL); |
1468 | ||
e4f9b4d5 | 1469 | bfd_map_over_sections (loadfile_bfd, load_section_callback, &cbdata); |
c906108c SS |
1470 | |
1471 | end_time = time (NULL); | |
ba5f2f8a | 1472 | |
e4f9b4d5 | 1473 | entry = bfd_get_start_address (loadfile_bfd); |
e4f9b4d5 MS |
1474 | ui_out_text (uiout, "Start address "); |
1475 | ui_out_field_fmt (uiout, "address", "0x%s", paddr_nz (entry)); | |
1476 | ui_out_text (uiout, ", load size "); | |
1477 | ui_out_field_fmt (uiout, "load-size", "%lu", cbdata.data_count); | |
1478 | ui_out_text (uiout, "\n"); | |
e4f9b4d5 MS |
1479 | /* We were doing this in remote-mips.c, I suspect it is right |
1480 | for other targets too. */ | |
1481 | write_pc (entry); | |
c906108c SS |
1482 | |
1483 | /* FIXME: are we supposed to call symbol_file_add or not? According to | |
1484 | a comment from remote-mips.c (where a call to symbol_file_add was | |
1485 | commented out), making the call confuses GDB if more than one file is | |
1486 | loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c | |
1487 | does. */ | |
1488 | ||
e4f9b4d5 MS |
1489 | print_transfer_performance (gdb_stdout, cbdata.data_count, |
1490 | cbdata.write_count, end_time - start_time); | |
c906108c SS |
1491 | |
1492 | do_cleanups (old_cleanups); | |
1493 | } | |
1494 | ||
1495 | /* Report how fast the transfer went. */ | |
1496 | ||
917317f4 JM |
1497 | /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being |
1498 | replaced by print_transfer_performance (with a very different | |
1499 | function signature). */ | |
1500 | ||
c906108c | 1501 | void |
fba45db2 KB |
1502 | report_transfer_performance (unsigned long data_count, time_t start_time, |
1503 | time_t end_time) | |
c906108c | 1504 | { |
ba5f2f8a MS |
1505 | print_transfer_performance (gdb_stdout, data_count, |
1506 | end_time - start_time, 0); | |
917317f4 JM |
1507 | } |
1508 | ||
1509 | void | |
d9fcf2fb | 1510 | print_transfer_performance (struct ui_file *stream, |
917317f4 JM |
1511 | unsigned long data_count, |
1512 | unsigned long write_count, | |
1513 | unsigned long time_count) | |
1514 | { | |
8b93c638 JM |
1515 | ui_out_text (uiout, "Transfer rate: "); |
1516 | if (time_count > 0) | |
1517 | { | |
ba5f2f8a | 1518 | ui_out_field_fmt (uiout, "transfer-rate", "%lu", |
8b93c638 JM |
1519 | (data_count * 8) / time_count); |
1520 | ui_out_text (uiout, " bits/sec"); | |
1521 | } | |
1522 | else | |
1523 | { | |
ba5f2f8a | 1524 | ui_out_field_fmt (uiout, "transferred-bits", "%lu", (data_count * 8)); |
8b93c638 JM |
1525 | ui_out_text (uiout, " bits in <1 sec"); |
1526 | } | |
1527 | if (write_count > 0) | |
1528 | { | |
1529 | ui_out_text (uiout, ", "); | |
ba5f2f8a | 1530 | ui_out_field_fmt (uiout, "write-rate", "%lu", data_count / write_count); |
8b93c638 JM |
1531 | ui_out_text (uiout, " bytes/write"); |
1532 | } | |
1533 | ui_out_text (uiout, ".\n"); | |
c906108c SS |
1534 | } |
1535 | ||
1536 | /* This function allows the addition of incrementally linked object files. | |
1537 | It does not modify any state in the target, only in the debugger. */ | |
db162d44 EZ |
1538 | /* Note: ezannoni 2000-04-13 This function/command used to have a |
1539 | special case syntax for the rombug target (Rombug is the boot | |
1540 | monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the | |
1541 | rombug case, the user doesn't need to supply a text address, | |
1542 | instead a call to target_link() (in target.c) would supply the | |
1543 | value to use. We are now discontinuing this type of ad hoc syntax. */ | |
c906108c SS |
1544 | |
1545 | /* ARGSUSED */ | |
1546 | static void | |
fba45db2 | 1547 | add_symbol_file_command (char *args, int from_tty) |
c906108c | 1548 | { |
db162d44 | 1549 | char *filename = NULL; |
2df3850c | 1550 | int flags = OBJF_USERLOADED; |
c906108c | 1551 | char *arg; |
2acceee2 | 1552 | int expecting_option = 0; |
db162d44 | 1553 | int section_index = 0; |
2acceee2 JM |
1554 | int argcnt = 0; |
1555 | int sec_num = 0; | |
1556 | int i; | |
db162d44 EZ |
1557 | int expecting_sec_name = 0; |
1558 | int expecting_sec_addr = 0; | |
1559 | ||
2acceee2 JM |
1560 | struct |
1561 | { | |
2acceee2 JM |
1562 | char *name; |
1563 | char *value; | |
db162d44 EZ |
1564 | } sect_opts[SECT_OFF_MAX]; |
1565 | ||
2acceee2 | 1566 | struct section_addr_info section_addrs; |
3017564a | 1567 | struct cleanup *my_cleanups = make_cleanup (null_cleanup, NULL); |
c5aa993b | 1568 | |
c906108c SS |
1569 | dont_repeat (); |
1570 | ||
1571 | if (args == NULL) | |
db162d44 | 1572 | error ("add-symbol-file takes a file name and an address"); |
c906108c SS |
1573 | |
1574 | /* Make a copy of the string that we can safely write into. */ | |
c2d11a7d | 1575 | args = xstrdup (args); |
c906108c | 1576 | |
2acceee2 JM |
1577 | /* Ensure section_addrs is initialized */ |
1578 | memset (§ion_addrs, 0, sizeof (section_addrs)); | |
1579 | ||
2acceee2 | 1580 | while (*args != '\000') |
c906108c | 1581 | { |
db162d44 | 1582 | /* Any leading spaces? */ |
c5aa993b | 1583 | while (isspace (*args)) |
db162d44 EZ |
1584 | args++; |
1585 | ||
1586 | /* Point arg to the beginning of the argument. */ | |
c906108c | 1587 | arg = args; |
db162d44 EZ |
1588 | |
1589 | /* Move args pointer over the argument. */ | |
c5aa993b | 1590 | while ((*args != '\000') && !isspace (*args)) |
db162d44 EZ |
1591 | args++; |
1592 | ||
1593 | /* If there are more arguments, terminate arg and | |
1594 | proceed past it. */ | |
c906108c | 1595 | if (*args != '\000') |
db162d44 EZ |
1596 | *args++ = '\000'; |
1597 | ||
1598 | /* Now process the argument. */ | |
1599 | if (argcnt == 0) | |
c906108c | 1600 | { |
db162d44 EZ |
1601 | /* The first argument is the file name. */ |
1602 | filename = tilde_expand (arg); | |
3017564a | 1603 | make_cleanup (xfree, filename); |
c906108c | 1604 | } |
db162d44 | 1605 | else |
7a78ae4e ND |
1606 | if (argcnt == 1) |
1607 | { | |
1608 | /* The second argument is always the text address at which | |
1609 | to load the program. */ | |
1610 | sect_opts[section_index].name = ".text"; | |
1611 | sect_opts[section_index].value = arg; | |
1612 | section_index++; | |
1613 | } | |
1614 | else | |
1615 | { | |
1616 | /* It's an option (starting with '-') or it's an argument | |
1617 | to an option */ | |
1618 | ||
1619 | if (*arg == '-') | |
1620 | { | |
1621 | if (strcmp (arg, "-mapped") == 0) | |
1622 | flags |= OBJF_MAPPED; | |
1623 | else | |
1624 | if (strcmp (arg, "-readnow") == 0) | |
1625 | flags |= OBJF_READNOW; | |
1626 | else | |
1627 | if (strcmp (arg, "-s") == 0) | |
1628 | { | |
1629 | if (section_index >= SECT_OFF_MAX) | |
1630 | error ("Too many sections specified."); | |
1631 | expecting_sec_name = 1; | |
1632 | expecting_sec_addr = 1; | |
1633 | } | |
1634 | } | |
1635 | else | |
1636 | { | |
1637 | if (expecting_sec_name) | |
db162d44 | 1638 | { |
7a78ae4e ND |
1639 | sect_opts[section_index].name = arg; |
1640 | expecting_sec_name = 0; | |
db162d44 EZ |
1641 | } |
1642 | else | |
7a78ae4e ND |
1643 | if (expecting_sec_addr) |
1644 | { | |
1645 | sect_opts[section_index].value = arg; | |
1646 | expecting_sec_addr = 0; | |
1647 | section_index++; | |
1648 | } | |
1649 | else | |
1650 | error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*"); | |
1651 | } | |
1652 | } | |
db162d44 | 1653 | argcnt++; |
c906108c | 1654 | } |
c906108c | 1655 | |
db162d44 EZ |
1656 | /* Print the prompt for the query below. And save the arguments into |
1657 | a sect_addr_info structure to be passed around to other | |
1658 | functions. We have to split this up into separate print | |
1659 | statements because local_hex_string returns a local static | |
1660 | string. */ | |
2acceee2 | 1661 | |
db162d44 EZ |
1662 | printf_filtered ("add symbol table from file \"%s\" at\n", filename); |
1663 | for (i = 0; i < section_index; i++) | |
c906108c | 1664 | { |
db162d44 EZ |
1665 | CORE_ADDR addr; |
1666 | char *val = sect_opts[i].value; | |
1667 | char *sec = sect_opts[i].name; | |
1668 | ||
1669 | val = sect_opts[i].value; | |
1670 | if (val[0] == '0' && val[1] == 'x') | |
1671 | addr = strtoul (val+2, NULL, 16); | |
1672 | else | |
1673 | addr = strtoul (val, NULL, 10); | |
1674 | ||
db162d44 EZ |
1675 | /* Here we store the section offsets in the order they were |
1676 | entered on the command line. */ | |
1677 | section_addrs.other[sec_num].name = sec; | |
1678 | section_addrs.other[sec_num].addr = addr; | |
1679 | printf_filtered ("\t%s_addr = %s\n", | |
1680 | sec, | |
1681 | local_hex_string ((unsigned long)addr)); | |
1682 | sec_num++; | |
1683 | ||
1684 | /* The object's sections are initialized when a | |
1685 | call is made to build_objfile_section_table (objfile). | |
1686 | This happens in reread_symbols. | |
1687 | At this point, we don't know what file type this is, | |
1688 | so we can't determine what section names are valid. */ | |
2acceee2 | 1689 | } |
db162d44 | 1690 | |
2acceee2 | 1691 | if (from_tty && (!query ("%s", ""))) |
c906108c SS |
1692 | error ("Not confirmed."); |
1693 | ||
db162d44 | 1694 | symbol_file_add (filename, from_tty, §ion_addrs, 0, flags); |
c906108c SS |
1695 | |
1696 | /* Getting new symbols may change our opinion about what is | |
1697 | frameless. */ | |
1698 | reinit_frame_cache (); | |
db162d44 | 1699 | do_cleanups (my_cleanups); |
c906108c SS |
1700 | } |
1701 | \f | |
1702 | static void | |
fba45db2 | 1703 | add_shared_symbol_files_command (char *args, int from_tty) |
c906108c SS |
1704 | { |
1705 | #ifdef ADD_SHARED_SYMBOL_FILES | |
1706 | ADD_SHARED_SYMBOL_FILES (args, from_tty); | |
1707 | #else | |
1708 | error ("This command is not available in this configuration of GDB."); | |
c5aa993b | 1709 | #endif |
c906108c SS |
1710 | } |
1711 | \f | |
1712 | /* Re-read symbols if a symbol-file has changed. */ | |
1713 | void | |
fba45db2 | 1714 | reread_symbols (void) |
c906108c SS |
1715 | { |
1716 | struct objfile *objfile; | |
1717 | long new_modtime; | |
1718 | int reread_one = 0; | |
1719 | struct stat new_statbuf; | |
1720 | int res; | |
1721 | ||
1722 | /* With the addition of shared libraries, this should be modified, | |
1723 | the load time should be saved in the partial symbol tables, since | |
1724 | different tables may come from different source files. FIXME. | |
1725 | This routine should then walk down each partial symbol table | |
1726 | and see if the symbol table that it originates from has been changed */ | |
1727 | ||
c5aa993b JM |
1728 | for (objfile = object_files; objfile; objfile = objfile->next) |
1729 | { | |
1730 | if (objfile->obfd) | |
1731 | { | |
c906108c | 1732 | #ifdef IBM6000_TARGET |
c5aa993b JM |
1733 | /* If this object is from a shared library, then you should |
1734 | stat on the library name, not member name. */ | |
c906108c | 1735 | |
c5aa993b JM |
1736 | if (objfile->obfd->my_archive) |
1737 | res = stat (objfile->obfd->my_archive->filename, &new_statbuf); | |
1738 | else | |
c906108c | 1739 | #endif |
c5aa993b JM |
1740 | res = stat (objfile->name, &new_statbuf); |
1741 | if (res != 0) | |
c906108c | 1742 | { |
c5aa993b JM |
1743 | /* FIXME, should use print_sys_errmsg but it's not filtered. */ |
1744 | printf_filtered ("`%s' has disappeared; keeping its symbols.\n", | |
1745 | objfile->name); | |
1746 | continue; | |
c906108c | 1747 | } |
c5aa993b JM |
1748 | new_modtime = new_statbuf.st_mtime; |
1749 | if (new_modtime != objfile->mtime) | |
c906108c | 1750 | { |
c5aa993b JM |
1751 | struct cleanup *old_cleanups; |
1752 | struct section_offsets *offsets; | |
1753 | int num_offsets; | |
c5aa993b JM |
1754 | char *obfd_filename; |
1755 | ||
1756 | printf_filtered ("`%s' has changed; re-reading symbols.\n", | |
1757 | objfile->name); | |
1758 | ||
1759 | /* There are various functions like symbol_file_add, | |
1760 | symfile_bfd_open, syms_from_objfile, etc., which might | |
1761 | appear to do what we want. But they have various other | |
1762 | effects which we *don't* want. So we just do stuff | |
1763 | ourselves. We don't worry about mapped files (for one thing, | |
1764 | any mapped file will be out of date). */ | |
1765 | ||
1766 | /* If we get an error, blow away this objfile (not sure if | |
1767 | that is the correct response for things like shared | |
1768 | libraries). */ | |
74b7792f | 1769 | old_cleanups = make_cleanup_free_objfile (objfile); |
c5aa993b | 1770 | /* We need to do this whenever any symbols go away. */ |
74b7792f | 1771 | make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/); |
c5aa993b JM |
1772 | |
1773 | /* Clean up any state BFD has sitting around. We don't need | |
1774 | to close the descriptor but BFD lacks a way of closing the | |
1775 | BFD without closing the descriptor. */ | |
1776 | obfd_filename = bfd_get_filename (objfile->obfd); | |
1777 | if (!bfd_close (objfile->obfd)) | |
1778 | error ("Can't close BFD for %s: %s", objfile->name, | |
1779 | bfd_errmsg (bfd_get_error ())); | |
1780 | objfile->obfd = bfd_openr (obfd_filename, gnutarget); | |
1781 | if (objfile->obfd == NULL) | |
1782 | error ("Can't open %s to read symbols.", objfile->name); | |
1783 | /* bfd_openr sets cacheable to true, which is what we want. */ | |
1784 | if (!bfd_check_format (objfile->obfd, bfd_object)) | |
1785 | error ("Can't read symbols from %s: %s.", objfile->name, | |
1786 | bfd_errmsg (bfd_get_error ())); | |
1787 | ||
1788 | /* Save the offsets, we will nuke them with the rest of the | |
1789 | psymbol_obstack. */ | |
1790 | num_offsets = objfile->num_sections; | |
d4f3574e SS |
1791 | offsets = (struct section_offsets *) alloca (SIZEOF_SECTION_OFFSETS); |
1792 | memcpy (offsets, objfile->section_offsets, SIZEOF_SECTION_OFFSETS); | |
c5aa993b JM |
1793 | |
1794 | /* Nuke all the state that we will re-read. Much of the following | |
1795 | code which sets things to NULL really is necessary to tell | |
1796 | other parts of GDB that there is nothing currently there. */ | |
1797 | ||
1798 | /* FIXME: Do we have to free a whole linked list, or is this | |
1799 | enough? */ | |
1800 | if (objfile->global_psymbols.list) | |
aac7f4ea | 1801 | xmfree (objfile->md, objfile->global_psymbols.list); |
c5aa993b JM |
1802 | memset (&objfile->global_psymbols, 0, |
1803 | sizeof (objfile->global_psymbols)); | |
1804 | if (objfile->static_psymbols.list) | |
aac7f4ea | 1805 | xmfree (objfile->md, objfile->static_psymbols.list); |
c5aa993b JM |
1806 | memset (&objfile->static_psymbols, 0, |
1807 | sizeof (objfile->static_psymbols)); | |
1808 | ||
1809 | /* Free the obstacks for non-reusable objfiles */ | |
af5f3db6 AC |
1810 | bcache_xfree (objfile->psymbol_cache); |
1811 | objfile->psymbol_cache = bcache_xmalloc (); | |
1812 | bcache_xfree (objfile->macro_cache); | |
1813 | objfile->macro_cache = bcache_xmalloc (); | |
c5aa993b JM |
1814 | obstack_free (&objfile->psymbol_obstack, 0); |
1815 | obstack_free (&objfile->symbol_obstack, 0); | |
1816 | obstack_free (&objfile->type_obstack, 0); | |
1817 | objfile->sections = NULL; | |
1818 | objfile->symtabs = NULL; | |
1819 | objfile->psymtabs = NULL; | |
1820 | objfile->free_psymtabs = NULL; | |
1821 | objfile->msymbols = NULL; | |
1822 | objfile->minimal_symbol_count = 0; | |
0a83117a MS |
1823 | memset (&objfile->msymbol_hash, 0, |
1824 | sizeof (objfile->msymbol_hash)); | |
1825 | memset (&objfile->msymbol_demangled_hash, 0, | |
1826 | sizeof (objfile->msymbol_demangled_hash)); | |
c5aa993b JM |
1827 | objfile->fundamental_types = NULL; |
1828 | if (objfile->sf != NULL) | |
1829 | { | |
1830 | (*objfile->sf->sym_finish) (objfile); | |
1831 | } | |
1832 | ||
1833 | /* We never make this a mapped file. */ | |
1834 | objfile->md = NULL; | |
1835 | /* obstack_specify_allocation also initializes the obstack so | |
1836 | it is empty. */ | |
af5f3db6 AC |
1837 | objfile->psymbol_cache = bcache_xmalloc (); |
1838 | objfile->macro_cache = bcache_xmalloc (); | |
c5aa993b | 1839 | obstack_specify_allocation (&objfile->psymbol_obstack, 0, 0, |
b8c9b27d | 1840 | xmalloc, xfree); |
c5aa993b | 1841 | obstack_specify_allocation (&objfile->symbol_obstack, 0, 0, |
b8c9b27d | 1842 | xmalloc, xfree); |
c5aa993b | 1843 | obstack_specify_allocation (&objfile->type_obstack, 0, 0, |
b8c9b27d | 1844 | xmalloc, xfree); |
c5aa993b JM |
1845 | if (build_objfile_section_table (objfile)) |
1846 | { | |
1847 | error ("Can't find the file sections in `%s': %s", | |
1848 | objfile->name, bfd_errmsg (bfd_get_error ())); | |
1849 | } | |
1850 | ||
1851 | /* We use the same section offsets as from last time. I'm not | |
1852 | sure whether that is always correct for shared libraries. */ | |
1853 | objfile->section_offsets = (struct section_offsets *) | |
d4f3574e SS |
1854 | obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS); |
1855 | memcpy (objfile->section_offsets, offsets, SIZEOF_SECTION_OFFSETS); | |
c5aa993b JM |
1856 | objfile->num_sections = num_offsets; |
1857 | ||
1858 | /* What the hell is sym_new_init for, anyway? The concept of | |
1859 | distinguishing between the main file and additional files | |
1860 | in this way seems rather dubious. */ | |
1861 | if (objfile == symfile_objfile) | |
1862 | { | |
1863 | (*objfile->sf->sym_new_init) (objfile); | |
c906108c | 1864 | #ifdef HPUXHPPA |
c5aa993b | 1865 | RESET_HP_UX_GLOBALS (); |
c906108c | 1866 | #endif |
c5aa993b JM |
1867 | } |
1868 | ||
1869 | (*objfile->sf->sym_init) (objfile); | |
b9caf505 | 1870 | clear_complaints (&symfile_complaints, 1, 1); |
c5aa993b JM |
1871 | /* The "mainline" parameter is a hideous hack; I think leaving it |
1872 | zero is OK since dbxread.c also does what it needs to do if | |
1873 | objfile->global_psymbols.size is 0. */ | |
96baa820 | 1874 | (*objfile->sf->sym_read) (objfile, 0); |
c5aa993b JM |
1875 | if (!have_partial_symbols () && !have_full_symbols ()) |
1876 | { | |
1877 | wrap_here (""); | |
1878 | printf_filtered ("(no debugging symbols found)\n"); | |
1879 | wrap_here (""); | |
1880 | } | |
1881 | objfile->flags |= OBJF_SYMS; | |
1882 | ||
1883 | /* We're done reading the symbol file; finish off complaints. */ | |
b9caf505 | 1884 | clear_complaints (&symfile_complaints, 0, 1); |
c906108c | 1885 | |
c5aa993b JM |
1886 | /* Getting new symbols may change our opinion about what is |
1887 | frameless. */ | |
c906108c | 1888 | |
c5aa993b | 1889 | reinit_frame_cache (); |
c906108c | 1890 | |
c5aa993b JM |
1891 | /* Discard cleanups as symbol reading was successful. */ |
1892 | discard_cleanups (old_cleanups); | |
c906108c | 1893 | |
c5aa993b JM |
1894 | /* If the mtime has changed between the time we set new_modtime |
1895 | and now, we *want* this to be out of date, so don't call stat | |
1896 | again now. */ | |
1897 | objfile->mtime = new_modtime; | |
1898 | reread_one = 1; | |
c906108c | 1899 | |
c5aa993b | 1900 | /* Call this after reading in a new symbol table to give target |
38c2ef12 | 1901 | dependent code a crack at the new symbols. For instance, this |
c5aa993b JM |
1902 | could be used to update the values of target-specific symbols GDB |
1903 | needs to keep track of (such as _sigtramp, or whatever). */ | |
c906108c | 1904 | |
c5aa993b JM |
1905 | TARGET_SYMFILE_POSTREAD (objfile); |
1906 | } | |
c906108c SS |
1907 | } |
1908 | } | |
c906108c SS |
1909 | |
1910 | if (reread_one) | |
1911 | clear_symtab_users (); | |
1912 | } | |
c906108c SS |
1913 | \f |
1914 | ||
c5aa993b JM |
1915 | |
1916 | typedef struct | |
1917 | { | |
1918 | char *ext; | |
c906108c | 1919 | enum language lang; |
c5aa993b JM |
1920 | } |
1921 | filename_language; | |
c906108c | 1922 | |
c5aa993b | 1923 | static filename_language *filename_language_table; |
c906108c SS |
1924 | static int fl_table_size, fl_table_next; |
1925 | ||
1926 | static void | |
fba45db2 | 1927 | add_filename_language (char *ext, enum language lang) |
c906108c SS |
1928 | { |
1929 | if (fl_table_next >= fl_table_size) | |
1930 | { | |
1931 | fl_table_size += 10; | |
25bf3106 PM |
1932 | filename_language_table = |
1933 | xrealloc (filename_language_table, | |
1934 | fl_table_size * sizeof (*filename_language_table)); | |
c906108c SS |
1935 | } |
1936 | ||
4fcf66da | 1937 | filename_language_table[fl_table_next].ext = xstrdup (ext); |
c906108c SS |
1938 | filename_language_table[fl_table_next].lang = lang; |
1939 | fl_table_next++; | |
1940 | } | |
1941 | ||
1942 | static char *ext_args; | |
1943 | ||
1944 | static void | |
fba45db2 | 1945 | set_ext_lang_command (char *args, int from_tty) |
c906108c SS |
1946 | { |
1947 | int i; | |
1948 | char *cp = ext_args; | |
1949 | enum language lang; | |
1950 | ||
1951 | /* First arg is filename extension, starting with '.' */ | |
1952 | if (*cp != '.') | |
1953 | error ("'%s': Filename extension must begin with '.'", ext_args); | |
1954 | ||
1955 | /* Find end of first arg. */ | |
c5aa993b | 1956 | while (*cp && !isspace (*cp)) |
c906108c SS |
1957 | cp++; |
1958 | ||
1959 | if (*cp == '\0') | |
1960 | error ("'%s': two arguments required -- filename extension and language", | |
1961 | ext_args); | |
1962 | ||
1963 | /* Null-terminate first arg */ | |
c5aa993b | 1964 | *cp++ = '\0'; |
c906108c SS |
1965 | |
1966 | /* Find beginning of second arg, which should be a source language. */ | |
1967 | while (*cp && isspace (*cp)) | |
1968 | cp++; | |
1969 | ||
1970 | if (*cp == '\0') | |
1971 | error ("'%s': two arguments required -- filename extension and language", | |
1972 | ext_args); | |
1973 | ||
1974 | /* Lookup the language from among those we know. */ | |
1975 | lang = language_enum (cp); | |
1976 | ||
1977 | /* Now lookup the filename extension: do we already know it? */ | |
1978 | for (i = 0; i < fl_table_next; i++) | |
1979 | if (0 == strcmp (ext_args, filename_language_table[i].ext)) | |
1980 | break; | |
1981 | ||
1982 | if (i >= fl_table_next) | |
1983 | { | |
1984 | /* new file extension */ | |
1985 | add_filename_language (ext_args, lang); | |
1986 | } | |
1987 | else | |
1988 | { | |
1989 | /* redefining a previously known filename extension */ | |
1990 | ||
1991 | /* if (from_tty) */ | |
1992 | /* query ("Really make files of type %s '%s'?", */ | |
1993 | /* ext_args, language_str (lang)); */ | |
1994 | ||
b8c9b27d | 1995 | xfree (filename_language_table[i].ext); |
4fcf66da | 1996 | filename_language_table[i].ext = xstrdup (ext_args); |
c906108c SS |
1997 | filename_language_table[i].lang = lang; |
1998 | } | |
1999 | } | |
2000 | ||
2001 | static void | |
fba45db2 | 2002 | info_ext_lang_command (char *args, int from_tty) |
c906108c SS |
2003 | { |
2004 | int i; | |
2005 | ||
2006 | printf_filtered ("Filename extensions and the languages they represent:"); | |
2007 | printf_filtered ("\n\n"); | |
2008 | for (i = 0; i < fl_table_next; i++) | |
c5aa993b JM |
2009 | printf_filtered ("\t%s\t- %s\n", |
2010 | filename_language_table[i].ext, | |
c906108c SS |
2011 | language_str (filename_language_table[i].lang)); |
2012 | } | |
2013 | ||
2014 | static void | |
fba45db2 | 2015 | init_filename_language_table (void) |
c906108c SS |
2016 | { |
2017 | if (fl_table_size == 0) /* protect against repetition */ | |
2018 | { | |
2019 | fl_table_size = 20; | |
2020 | fl_table_next = 0; | |
c5aa993b | 2021 | filename_language_table = |
c906108c | 2022 | xmalloc (fl_table_size * sizeof (*filename_language_table)); |
c5aa993b JM |
2023 | add_filename_language (".c", language_c); |
2024 | add_filename_language (".C", language_cplus); | |
2025 | add_filename_language (".cc", language_cplus); | |
2026 | add_filename_language (".cp", language_cplus); | |
2027 | add_filename_language (".cpp", language_cplus); | |
2028 | add_filename_language (".cxx", language_cplus); | |
2029 | add_filename_language (".c++", language_cplus); | |
2030 | add_filename_language (".java", language_java); | |
c906108c | 2031 | add_filename_language (".class", language_java); |
da2cf7e0 | 2032 | add_filename_language (".m", language_objc); |
c5aa993b JM |
2033 | add_filename_language (".f", language_fortran); |
2034 | add_filename_language (".F", language_fortran); | |
2035 | add_filename_language (".s", language_asm); | |
2036 | add_filename_language (".S", language_asm); | |
c6fd39cd PM |
2037 | add_filename_language (".pas", language_pascal); |
2038 | add_filename_language (".p", language_pascal); | |
2039 | add_filename_language (".pp", language_pascal); | |
c906108c SS |
2040 | } |
2041 | } | |
2042 | ||
2043 | enum language | |
fba45db2 | 2044 | deduce_language_from_filename (char *filename) |
c906108c SS |
2045 | { |
2046 | int i; | |
2047 | char *cp; | |
2048 | ||
2049 | if (filename != NULL) | |
2050 | if ((cp = strrchr (filename, '.')) != NULL) | |
2051 | for (i = 0; i < fl_table_next; i++) | |
2052 | if (strcmp (cp, filename_language_table[i].ext) == 0) | |
2053 | return filename_language_table[i].lang; | |
2054 | ||
2055 | return language_unknown; | |
2056 | } | |
2057 | \f | |
2058 | /* allocate_symtab: | |
2059 | ||
2060 | Allocate and partly initialize a new symbol table. Return a pointer | |
2061 | to it. error() if no space. | |
2062 | ||
2063 | Caller must set these fields: | |
c5aa993b JM |
2064 | LINETABLE(symtab) |
2065 | symtab->blockvector | |
2066 | symtab->dirname | |
2067 | symtab->free_code | |
2068 | symtab->free_ptr | |
2069 | possibly free_named_symtabs (symtab->filename); | |
c906108c SS |
2070 | */ |
2071 | ||
2072 | struct symtab * | |
fba45db2 | 2073 | allocate_symtab (char *filename, struct objfile *objfile) |
c906108c SS |
2074 | { |
2075 | register struct symtab *symtab; | |
2076 | ||
2077 | symtab = (struct symtab *) | |
c5aa993b | 2078 | obstack_alloc (&objfile->symbol_obstack, sizeof (struct symtab)); |
c906108c | 2079 | memset (symtab, 0, sizeof (*symtab)); |
c5aa993b JM |
2080 | symtab->filename = obsavestring (filename, strlen (filename), |
2081 | &objfile->symbol_obstack); | |
2082 | symtab->fullname = NULL; | |
2083 | symtab->language = deduce_language_from_filename (filename); | |
2084 | symtab->debugformat = obsavestring ("unknown", 7, | |
2085 | &objfile->symbol_obstack); | |
c906108c SS |
2086 | |
2087 | /* Hook it to the objfile it comes from */ | |
2088 | ||
c5aa993b JM |
2089 | symtab->objfile = objfile; |
2090 | symtab->next = objfile->symtabs; | |
2091 | objfile->symtabs = symtab; | |
c906108c SS |
2092 | |
2093 | /* FIXME: This should go away. It is only defined for the Z8000, | |
2094 | and the Z8000 definition of this macro doesn't have anything to | |
2095 | do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just | |
2096 | here for convenience. */ | |
2097 | #ifdef INIT_EXTRA_SYMTAB_INFO | |
2098 | INIT_EXTRA_SYMTAB_INFO (symtab); | |
2099 | #endif | |
2100 | ||
2101 | return (symtab); | |
2102 | } | |
2103 | ||
2104 | struct partial_symtab * | |
fba45db2 | 2105 | allocate_psymtab (char *filename, struct objfile *objfile) |
c906108c SS |
2106 | { |
2107 | struct partial_symtab *psymtab; | |
2108 | ||
c5aa993b | 2109 | if (objfile->free_psymtabs) |
c906108c | 2110 | { |
c5aa993b JM |
2111 | psymtab = objfile->free_psymtabs; |
2112 | objfile->free_psymtabs = psymtab->next; | |
c906108c SS |
2113 | } |
2114 | else | |
2115 | psymtab = (struct partial_symtab *) | |
c5aa993b | 2116 | obstack_alloc (&objfile->psymbol_obstack, |
c906108c SS |
2117 | sizeof (struct partial_symtab)); |
2118 | ||
2119 | memset (psymtab, 0, sizeof (struct partial_symtab)); | |
c5aa993b JM |
2120 | psymtab->filename = obsavestring (filename, strlen (filename), |
2121 | &objfile->psymbol_obstack); | |
2122 | psymtab->symtab = NULL; | |
c906108c SS |
2123 | |
2124 | /* Prepend it to the psymtab list for the objfile it belongs to. | |
2125 | Psymtabs are searched in most recent inserted -> least recent | |
2126 | inserted order. */ | |
2127 | ||
c5aa993b JM |
2128 | psymtab->objfile = objfile; |
2129 | psymtab->next = objfile->psymtabs; | |
2130 | objfile->psymtabs = psymtab; | |
c906108c SS |
2131 | #if 0 |
2132 | { | |
2133 | struct partial_symtab **prev_pst; | |
c5aa993b JM |
2134 | psymtab->objfile = objfile; |
2135 | psymtab->next = NULL; | |
2136 | prev_pst = &(objfile->psymtabs); | |
c906108c | 2137 | while ((*prev_pst) != NULL) |
c5aa993b | 2138 | prev_pst = &((*prev_pst)->next); |
c906108c | 2139 | (*prev_pst) = psymtab; |
c5aa993b | 2140 | } |
c906108c | 2141 | #endif |
c5aa993b | 2142 | |
c906108c SS |
2143 | return (psymtab); |
2144 | } | |
2145 | ||
2146 | void | |
fba45db2 | 2147 | discard_psymtab (struct partial_symtab *pst) |
c906108c SS |
2148 | { |
2149 | struct partial_symtab **prev_pst; | |
2150 | ||
2151 | /* From dbxread.c: | |
2152 | Empty psymtabs happen as a result of header files which don't | |
2153 | have any symbols in them. There can be a lot of them. But this | |
2154 | check is wrong, in that a psymtab with N_SLINE entries but | |
2155 | nothing else is not empty, but we don't realize that. Fixing | |
2156 | that without slowing things down might be tricky. */ | |
2157 | ||
2158 | /* First, snip it out of the psymtab chain */ | |
2159 | ||
2160 | prev_pst = &(pst->objfile->psymtabs); | |
2161 | while ((*prev_pst) != pst) | |
2162 | prev_pst = &((*prev_pst)->next); | |
2163 | (*prev_pst) = pst->next; | |
2164 | ||
2165 | /* Next, put it on a free list for recycling */ | |
2166 | ||
2167 | pst->next = pst->objfile->free_psymtabs; | |
2168 | pst->objfile->free_psymtabs = pst; | |
2169 | } | |
c906108c | 2170 | \f |
c5aa993b | 2171 | |
c906108c SS |
2172 | /* Reset all data structures in gdb which may contain references to symbol |
2173 | table data. */ | |
2174 | ||
2175 | void | |
fba45db2 | 2176 | clear_symtab_users (void) |
c906108c SS |
2177 | { |
2178 | /* Someday, we should do better than this, by only blowing away | |
2179 | the things that really need to be blown. */ | |
2180 | clear_value_history (); | |
2181 | clear_displays (); | |
2182 | clear_internalvars (); | |
2183 | breakpoint_re_set (); | |
2184 | set_default_breakpoint (0, 0, 0, 0); | |
0378c332 | 2185 | clear_current_source_symtab_and_line (); |
c906108c | 2186 | clear_pc_function_cache (); |
11cf8741 JM |
2187 | if (target_new_objfile_hook) |
2188 | target_new_objfile_hook (NULL); | |
c906108c SS |
2189 | } |
2190 | ||
74b7792f AC |
2191 | static void |
2192 | clear_symtab_users_cleanup (void *ignore) | |
2193 | { | |
2194 | clear_symtab_users (); | |
2195 | } | |
2196 | ||
c906108c SS |
2197 | /* clear_symtab_users_once: |
2198 | ||
2199 | This function is run after symbol reading, or from a cleanup. | |
2200 | If an old symbol table was obsoleted, the old symbol table | |
2201 | has been blown away, but the other GDB data structures that may | |
2202 | reference it have not yet been cleared or re-directed. (The old | |
2203 | symtab was zapped, and the cleanup queued, in free_named_symtab() | |
2204 | below.) | |
2205 | ||
2206 | This function can be queued N times as a cleanup, or called | |
2207 | directly; it will do all the work the first time, and then will be a | |
2208 | no-op until the next time it is queued. This works by bumping a | |
2209 | counter at queueing time. Much later when the cleanup is run, or at | |
2210 | the end of symbol processing (in case the cleanup is discarded), if | |
2211 | the queued count is greater than the "done-count", we do the work | |
2212 | and set the done-count to the queued count. If the queued count is | |
2213 | less than or equal to the done-count, we just ignore the call. This | |
2214 | is needed because reading a single .o file will often replace many | |
2215 | symtabs (one per .h file, for example), and we don't want to reset | |
2216 | the breakpoints N times in the user's face. | |
2217 | ||
2218 | The reason we both queue a cleanup, and call it directly after symbol | |
2219 | reading, is because the cleanup protects us in case of errors, but is | |
2220 | discarded if symbol reading is successful. */ | |
2221 | ||
2222 | #if 0 | |
2223 | /* FIXME: As free_named_symtabs is currently a big noop this function | |
2224 | is no longer needed. */ | |
a14ed312 | 2225 | static void clear_symtab_users_once (void); |
c906108c SS |
2226 | |
2227 | static int clear_symtab_users_queued; | |
2228 | static int clear_symtab_users_done; | |
2229 | ||
2230 | static void | |
fba45db2 | 2231 | clear_symtab_users_once (void) |
c906108c SS |
2232 | { |
2233 | /* Enforce once-per-`do_cleanups'-semantics */ | |
2234 | if (clear_symtab_users_queued <= clear_symtab_users_done) | |
2235 | return; | |
2236 | clear_symtab_users_done = clear_symtab_users_queued; | |
2237 | ||
2238 | clear_symtab_users (); | |
2239 | } | |
2240 | #endif | |
2241 | ||
2242 | /* Delete the specified psymtab, and any others that reference it. */ | |
2243 | ||
2244 | static void | |
fba45db2 | 2245 | cashier_psymtab (struct partial_symtab *pst) |
c906108c SS |
2246 | { |
2247 | struct partial_symtab *ps, *pprev = NULL; | |
2248 | int i; | |
2249 | ||
2250 | /* Find its previous psymtab in the chain */ | |
c5aa993b JM |
2251 | for (ps = pst->objfile->psymtabs; ps; ps = ps->next) |
2252 | { | |
2253 | if (ps == pst) | |
2254 | break; | |
2255 | pprev = ps; | |
2256 | } | |
c906108c | 2257 | |
c5aa993b JM |
2258 | if (ps) |
2259 | { | |
2260 | /* Unhook it from the chain. */ | |
2261 | if (ps == pst->objfile->psymtabs) | |
2262 | pst->objfile->psymtabs = ps->next; | |
2263 | else | |
2264 | pprev->next = ps->next; | |
2265 | ||
2266 | /* FIXME, we can't conveniently deallocate the entries in the | |
2267 | partial_symbol lists (global_psymbols/static_psymbols) that | |
2268 | this psymtab points to. These just take up space until all | |
2269 | the psymtabs are reclaimed. Ditto the dependencies list and | |
2270 | filename, which are all in the psymbol_obstack. */ | |
2271 | ||
2272 | /* We need to cashier any psymtab that has this one as a dependency... */ | |
2273 | again: | |
2274 | for (ps = pst->objfile->psymtabs; ps; ps = ps->next) | |
2275 | { | |
2276 | for (i = 0; i < ps->number_of_dependencies; i++) | |
2277 | { | |
2278 | if (ps->dependencies[i] == pst) | |
2279 | { | |
2280 | cashier_psymtab (ps); | |
2281 | goto again; /* Must restart, chain has been munged. */ | |
2282 | } | |
2283 | } | |
c906108c | 2284 | } |
c906108c | 2285 | } |
c906108c SS |
2286 | } |
2287 | ||
2288 | /* If a symtab or psymtab for filename NAME is found, free it along | |
2289 | with any dependent breakpoints, displays, etc. | |
2290 | Used when loading new versions of object modules with the "add-file" | |
2291 | command. This is only called on the top-level symtab or psymtab's name; | |
2292 | it is not called for subsidiary files such as .h files. | |
2293 | ||
2294 | Return value is 1 if we blew away the environment, 0 if not. | |
7e73cedf | 2295 | FIXME. The return value appears to never be used. |
c906108c SS |
2296 | |
2297 | FIXME. I think this is not the best way to do this. We should | |
2298 | work on being gentler to the environment while still cleaning up | |
2299 | all stray pointers into the freed symtab. */ | |
2300 | ||
2301 | int | |
fba45db2 | 2302 | free_named_symtabs (char *name) |
c906108c SS |
2303 | { |
2304 | #if 0 | |
2305 | /* FIXME: With the new method of each objfile having it's own | |
2306 | psymtab list, this function needs serious rethinking. In particular, | |
2307 | why was it ever necessary to toss psymtabs with specific compilation | |
2308 | unit filenames, as opposed to all psymtabs from a particular symbol | |
2309 | file? -- fnf | |
2310 | Well, the answer is that some systems permit reloading of particular | |
2311 | compilation units. We want to blow away any old info about these | |
2312 | compilation units, regardless of which objfiles they arrived in. --gnu. */ | |
2313 | ||
2314 | register struct symtab *s; | |
2315 | register struct symtab *prev; | |
2316 | register struct partial_symtab *ps; | |
2317 | struct blockvector *bv; | |
2318 | int blewit = 0; | |
2319 | ||
2320 | /* We only wack things if the symbol-reload switch is set. */ | |
2321 | if (!symbol_reloading) | |
2322 | return 0; | |
2323 | ||
2324 | /* Some symbol formats have trouble providing file names... */ | |
2325 | if (name == 0 || *name == '\0') | |
2326 | return 0; | |
2327 | ||
2328 | /* Look for a psymtab with the specified name. */ | |
2329 | ||
2330 | again2: | |
c5aa993b JM |
2331 | for (ps = partial_symtab_list; ps; ps = ps->next) |
2332 | { | |
2333 | if (STREQ (name, ps->filename)) | |
2334 | { | |
2335 | cashier_psymtab (ps); /* Blow it away...and its little dog, too. */ | |
2336 | goto again2; /* Must restart, chain has been munged */ | |
2337 | } | |
c906108c | 2338 | } |
c906108c SS |
2339 | |
2340 | /* Look for a symtab with the specified name. */ | |
2341 | ||
2342 | for (s = symtab_list; s; s = s->next) | |
2343 | { | |
2344 | if (STREQ (name, s->filename)) | |
2345 | break; | |
2346 | prev = s; | |
2347 | } | |
2348 | ||
2349 | if (s) | |
2350 | { | |
2351 | if (s == symtab_list) | |
2352 | symtab_list = s->next; | |
2353 | else | |
2354 | prev->next = s->next; | |
2355 | ||
2356 | /* For now, queue a delete for all breakpoints, displays, etc., whether | |
c5aa993b JM |
2357 | or not they depend on the symtab being freed. This should be |
2358 | changed so that only those data structures affected are deleted. */ | |
c906108c SS |
2359 | |
2360 | /* But don't delete anything if the symtab is empty. | |
c5aa993b JM |
2361 | This test is necessary due to a bug in "dbxread.c" that |
2362 | causes empty symtabs to be created for N_SO symbols that | |
2363 | contain the pathname of the object file. (This problem | |
2364 | has been fixed in GDB 3.9x). */ | |
c906108c SS |
2365 | |
2366 | bv = BLOCKVECTOR (s); | |
2367 | if (BLOCKVECTOR_NBLOCKS (bv) > 2 | |
2368 | || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) | |
2369 | || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK))) | |
2370 | { | |
b9caf505 AC |
2371 | complaint (&symfile_complaints, "Replacing old symbols for `%s'", |
2372 | name); | |
c906108c SS |
2373 | clear_symtab_users_queued++; |
2374 | make_cleanup (clear_symtab_users_once, 0); | |
2375 | blewit = 1; | |
c5aa993b JM |
2376 | } |
2377 | else | |
2378 | { | |
b9caf505 AC |
2379 | complaint (&symfile_complaints, "Empty symbol table found for `%s'", |
2380 | name); | |
c906108c SS |
2381 | } |
2382 | ||
2383 | free_symtab (s); | |
2384 | } | |
2385 | else | |
2386 | { | |
2387 | /* It is still possible that some breakpoints will be affected | |
c5aa993b JM |
2388 | even though no symtab was found, since the file might have |
2389 | been compiled without debugging, and hence not be associated | |
2390 | with a symtab. In order to handle this correctly, we would need | |
2391 | to keep a list of text address ranges for undebuggable files. | |
2392 | For now, we do nothing, since this is a fairly obscure case. */ | |
c906108c SS |
2393 | ; |
2394 | } | |
2395 | ||
2396 | /* FIXME, what about the minimal symbol table? */ | |
2397 | return blewit; | |
2398 | #else | |
2399 | return (0); | |
2400 | #endif | |
2401 | } | |
2402 | \f | |
2403 | /* Allocate and partially fill a partial symtab. It will be | |
2404 | completely filled at the end of the symbol list. | |
2405 | ||
d4f3574e | 2406 | FILENAME is the name of the symbol-file we are reading from. */ |
c906108c SS |
2407 | |
2408 | struct partial_symtab * | |
fba45db2 KB |
2409 | start_psymtab_common (struct objfile *objfile, |
2410 | struct section_offsets *section_offsets, char *filename, | |
2411 | CORE_ADDR textlow, struct partial_symbol **global_syms, | |
2412 | struct partial_symbol **static_syms) | |
c906108c SS |
2413 | { |
2414 | struct partial_symtab *psymtab; | |
2415 | ||
2416 | psymtab = allocate_psymtab (filename, objfile); | |
c5aa993b JM |
2417 | psymtab->section_offsets = section_offsets; |
2418 | psymtab->textlow = textlow; | |
2419 | psymtab->texthigh = psymtab->textlow; /* default */ | |
2420 | psymtab->globals_offset = global_syms - objfile->global_psymbols.list; | |
2421 | psymtab->statics_offset = static_syms - objfile->static_psymbols.list; | |
c906108c SS |
2422 | return (psymtab); |
2423 | } | |
2424 | \f | |
2425 | /* Add a symbol with a long value to a psymtab. | |
2426 | Since one arg is a struct, we pass in a ptr and deref it (sigh). */ | |
2427 | ||
2428 | void | |
fba45db2 KB |
2429 | add_psymbol_to_list (char *name, int namelength, namespace_enum namespace, |
2430 | enum address_class class, | |
2431 | struct psymbol_allocation_list *list, long val, /* Value as a long */ | |
2432 | CORE_ADDR coreaddr, /* Value as a CORE_ADDR */ | |
2433 | enum language language, struct objfile *objfile) | |
c906108c SS |
2434 | { |
2435 | register struct partial_symbol *psym; | |
2436 | char *buf = alloca (namelength + 1); | |
2437 | /* psymbol is static so that there will be no uninitialized gaps in the | |
2438 | structure which might contain random data, causing cache misses in | |
2439 | bcache. */ | |
2440 | static struct partial_symbol psymbol; | |
2441 | ||
2442 | /* Create local copy of the partial symbol */ | |
2443 | memcpy (buf, name, namelength); | |
2444 | buf[namelength] = '\0'; | |
af5f3db6 | 2445 | SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, objfile->psymbol_cache); |
c906108c SS |
2446 | /* val and coreaddr are mutually exclusive, one of them *will* be zero */ |
2447 | if (val != 0) | |
2448 | { | |
2449 | SYMBOL_VALUE (&psymbol) = val; | |
2450 | } | |
2451 | else | |
2452 | { | |
2453 | SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr; | |
2454 | } | |
2455 | SYMBOL_SECTION (&psymbol) = 0; | |
2456 | SYMBOL_LANGUAGE (&psymbol) = language; | |
2457 | PSYMBOL_NAMESPACE (&psymbol) = namespace; | |
2458 | PSYMBOL_CLASS (&psymbol) = class; | |
2459 | SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language); | |
2460 | ||
2461 | /* Stash the partial symbol away in the cache */ | |
af5f3db6 | 2462 | psym = bcache (&psymbol, sizeof (struct partial_symbol), objfile->psymbol_cache); |
c906108c SS |
2463 | |
2464 | /* Save pointer to partial symbol in psymtab, growing symtab if needed. */ | |
2465 | if (list->next >= list->list + list->size) | |
2466 | { | |
2467 | extend_psymbol_list (list, objfile); | |
2468 | } | |
2469 | *list->next++ = psym; | |
2470 | OBJSTAT (objfile, n_psyms++); | |
2471 | } | |
2472 | ||
2473 | /* Add a symbol with a long value to a psymtab. This differs from | |
2474 | * add_psymbol_to_list above in taking both a mangled and a demangled | |
2475 | * name. */ | |
2476 | ||
2477 | void | |
fba45db2 KB |
2478 | add_psymbol_with_dem_name_to_list (char *name, int namelength, char *dem_name, |
2479 | int dem_namelength, namespace_enum namespace, | |
2480 | enum address_class class, | |
2481 | struct psymbol_allocation_list *list, long val, /* Value as a long */ | |
2482 | CORE_ADDR coreaddr, /* Value as a CORE_ADDR */ | |
2483 | enum language language, | |
2484 | struct objfile *objfile) | |
c906108c SS |
2485 | { |
2486 | register struct partial_symbol *psym; | |
2487 | char *buf = alloca (namelength + 1); | |
2488 | /* psymbol is static so that there will be no uninitialized gaps in the | |
2489 | structure which might contain random data, causing cache misses in | |
2490 | bcache. */ | |
2491 | static struct partial_symbol psymbol; | |
2492 | ||
2493 | /* Create local copy of the partial symbol */ | |
2494 | ||
2495 | memcpy (buf, name, namelength); | |
2496 | buf[namelength] = '\0'; | |
af5f3db6 | 2497 | SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, objfile->psymbol_cache); |
c906108c SS |
2498 | |
2499 | buf = alloca (dem_namelength + 1); | |
2500 | memcpy (buf, dem_name, dem_namelength); | |
2501 | buf[dem_namelength] = '\0'; | |
c5aa993b | 2502 | |
c906108c SS |
2503 | switch (language) |
2504 | { | |
c5aa993b JM |
2505 | case language_c: |
2506 | case language_cplus: | |
2507 | SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol) = | |
af5f3db6 | 2508 | bcache (buf, dem_namelength + 1, objfile->psymbol_cache); |
c5aa993b | 2509 | break; |
c906108c SS |
2510 | /* FIXME What should be done for the default case? Ignoring for now. */ |
2511 | } | |
2512 | ||
2513 | /* val and coreaddr are mutually exclusive, one of them *will* be zero */ | |
2514 | if (val != 0) | |
2515 | { | |
2516 | SYMBOL_VALUE (&psymbol) = val; | |
2517 | } | |
2518 | else | |
2519 | { | |
2520 | SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr; | |
2521 | } | |
2522 | SYMBOL_SECTION (&psymbol) = 0; | |
2523 | SYMBOL_LANGUAGE (&psymbol) = language; | |
2524 | PSYMBOL_NAMESPACE (&psymbol) = namespace; | |
2525 | PSYMBOL_CLASS (&psymbol) = class; | |
2526 | SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language); | |
2527 | ||
2528 | /* Stash the partial symbol away in the cache */ | |
af5f3db6 | 2529 | psym = bcache (&psymbol, sizeof (struct partial_symbol), objfile->psymbol_cache); |
c906108c SS |
2530 | |
2531 | /* Save pointer to partial symbol in psymtab, growing symtab if needed. */ | |
2532 | if (list->next >= list->list + list->size) | |
2533 | { | |
2534 | extend_psymbol_list (list, objfile); | |
2535 | } | |
2536 | *list->next++ = psym; | |
2537 | OBJSTAT (objfile, n_psyms++); | |
2538 | } | |
2539 | ||
2540 | /* Initialize storage for partial symbols. */ | |
2541 | ||
2542 | void | |
fba45db2 | 2543 | init_psymbol_list (struct objfile *objfile, int total_symbols) |
c906108c SS |
2544 | { |
2545 | /* Free any previously allocated psymbol lists. */ | |
c5aa993b JM |
2546 | |
2547 | if (objfile->global_psymbols.list) | |
c906108c | 2548 | { |
4efb68b1 | 2549 | xmfree (objfile->md, objfile->global_psymbols.list); |
c906108c | 2550 | } |
c5aa993b | 2551 | if (objfile->static_psymbols.list) |
c906108c | 2552 | { |
4efb68b1 | 2553 | xmfree (objfile->md, objfile->static_psymbols.list); |
c906108c | 2554 | } |
c5aa993b | 2555 | |
c906108c SS |
2556 | /* Current best guess is that approximately a twentieth |
2557 | of the total symbols (in a debugging file) are global or static | |
2558 | oriented symbols */ | |
c906108c | 2559 | |
c5aa993b JM |
2560 | objfile->global_psymbols.size = total_symbols / 10; |
2561 | objfile->static_psymbols.size = total_symbols / 10; | |
2562 | ||
2563 | if (objfile->global_psymbols.size > 0) | |
c906108c | 2564 | { |
c5aa993b JM |
2565 | objfile->global_psymbols.next = |
2566 | objfile->global_psymbols.list = (struct partial_symbol **) | |
2567 | xmmalloc (objfile->md, (objfile->global_psymbols.size | |
2568 | * sizeof (struct partial_symbol *))); | |
c906108c | 2569 | } |
c5aa993b | 2570 | if (objfile->static_psymbols.size > 0) |
c906108c | 2571 | { |
c5aa993b JM |
2572 | objfile->static_psymbols.next = |
2573 | objfile->static_psymbols.list = (struct partial_symbol **) | |
2574 | xmmalloc (objfile->md, (objfile->static_psymbols.size | |
2575 | * sizeof (struct partial_symbol *))); | |
c906108c SS |
2576 | } |
2577 | } | |
2578 | ||
2579 | /* OVERLAYS: | |
2580 | The following code implements an abstraction for debugging overlay sections. | |
2581 | ||
2582 | The target model is as follows: | |
2583 | 1) The gnu linker will permit multiple sections to be mapped into the | |
c5aa993b | 2584 | same VMA, each with its own unique LMA (or load address). |
c906108c | 2585 | 2) It is assumed that some runtime mechanism exists for mapping the |
c5aa993b | 2586 | sections, one by one, from the load address into the VMA address. |
c906108c | 2587 | 3) This code provides a mechanism for gdb to keep track of which |
c5aa993b JM |
2588 | sections should be considered to be mapped from the VMA to the LMA. |
2589 | This information is used for symbol lookup, and memory read/write. | |
2590 | For instance, if a section has been mapped then its contents | |
2591 | should be read from the VMA, otherwise from the LMA. | |
c906108c SS |
2592 | |
2593 | Two levels of debugger support for overlays are available. One is | |
2594 | "manual", in which the debugger relies on the user to tell it which | |
2595 | overlays are currently mapped. This level of support is | |
2596 | implemented entirely in the core debugger, and the information about | |
2597 | whether a section is mapped is kept in the objfile->obj_section table. | |
2598 | ||
2599 | The second level of support is "automatic", and is only available if | |
2600 | the target-specific code provides functionality to read the target's | |
2601 | overlay mapping table, and translate its contents for the debugger | |
2602 | (by updating the mapped state information in the obj_section tables). | |
2603 | ||
2604 | The interface is as follows: | |
c5aa993b JM |
2605 | User commands: |
2606 | overlay map <name> -- tell gdb to consider this section mapped | |
2607 | overlay unmap <name> -- tell gdb to consider this section unmapped | |
2608 | overlay list -- list the sections that GDB thinks are mapped | |
2609 | overlay read-target -- get the target's state of what's mapped | |
2610 | overlay off/manual/auto -- set overlay debugging state | |
2611 | Functional interface: | |
2612 | find_pc_mapped_section(pc): if the pc is in the range of a mapped | |
2613 | section, return that section. | |
2614 | find_pc_overlay(pc): find any overlay section that contains | |
2615 | the pc, either in its VMA or its LMA | |
2616 | overlay_is_mapped(sect): true if overlay is marked as mapped | |
2617 | section_is_overlay(sect): true if section's VMA != LMA | |
2618 | pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA | |
2619 | pc_in_unmapped_range(...): true if pc belongs to section's LMA | |
9ec8e6a0 | 2620 | sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap |
c5aa993b JM |
2621 | overlay_mapped_address(...): map an address from section's LMA to VMA |
2622 | overlay_unmapped_address(...): map an address from section's VMA to LMA | |
2623 | symbol_overlayed_address(...): Return a "current" address for symbol: | |
2624 | either in VMA or LMA depending on whether | |
2625 | the symbol's section is currently mapped | |
c906108c SS |
2626 | */ |
2627 | ||
2628 | /* Overlay debugging state: */ | |
2629 | ||
d874f1e2 | 2630 | enum overlay_debugging_state overlay_debugging = ovly_off; |
c906108c SS |
2631 | int overlay_cache_invalid = 0; /* True if need to refresh mapped state */ |
2632 | ||
2633 | /* Target vector for refreshing overlay mapped state */ | |
a14ed312 | 2634 | static void simple_overlay_update (struct obj_section *); |
507f3c78 | 2635 | void (*target_overlay_update) (struct obj_section *) = simple_overlay_update; |
c906108c SS |
2636 | |
2637 | /* Function: section_is_overlay (SECTION) | |
2638 | Returns true if SECTION has VMA not equal to LMA, ie. | |
2639 | SECTION is loaded at an address different from where it will "run". */ | |
2640 | ||
2641 | int | |
fba45db2 | 2642 | section_is_overlay (asection *section) |
c906108c | 2643 | { |
fbd35540 MS |
2644 | /* FIXME: need bfd *, so we can use bfd_section_lma methods. */ |
2645 | ||
c906108c SS |
2646 | if (overlay_debugging) |
2647 | if (section && section->lma != 0 && | |
2648 | section->vma != section->lma) | |
2649 | return 1; | |
2650 | ||
2651 | return 0; | |
2652 | } | |
2653 | ||
2654 | /* Function: overlay_invalidate_all (void) | |
2655 | Invalidate the mapped state of all overlay sections (mark it as stale). */ | |
2656 | ||
2657 | static void | |
fba45db2 | 2658 | overlay_invalidate_all (void) |
c906108c | 2659 | { |
c5aa993b | 2660 | struct objfile *objfile; |
c906108c SS |
2661 | struct obj_section *sect; |
2662 | ||
2663 | ALL_OBJSECTIONS (objfile, sect) | |
2664 | if (section_is_overlay (sect->the_bfd_section)) | |
c5aa993b | 2665 | sect->ovly_mapped = -1; |
c906108c SS |
2666 | } |
2667 | ||
2668 | /* Function: overlay_is_mapped (SECTION) | |
2669 | Returns true if section is an overlay, and is currently mapped. | |
2670 | Private: public access is thru function section_is_mapped. | |
2671 | ||
2672 | Access to the ovly_mapped flag is restricted to this function, so | |
2673 | that we can do automatic update. If the global flag | |
2674 | OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call | |
2675 | overlay_invalidate_all. If the mapped state of the particular | |
2676 | section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */ | |
2677 | ||
c5aa993b | 2678 | static int |
fba45db2 | 2679 | overlay_is_mapped (struct obj_section *osect) |
c906108c SS |
2680 | { |
2681 | if (osect == 0 || !section_is_overlay (osect->the_bfd_section)) | |
2682 | return 0; | |
2683 | ||
c5aa993b | 2684 | switch (overlay_debugging) |
c906108c SS |
2685 | { |
2686 | default: | |
d874f1e2 | 2687 | case ovly_off: |
c5aa993b | 2688 | return 0; /* overlay debugging off */ |
d874f1e2 | 2689 | case ovly_auto: /* overlay debugging automatic */ |
c906108c | 2690 | /* Unles there is a target_overlay_update function, |
c5aa993b | 2691 | there's really nothing useful to do here (can't really go auto) */ |
c906108c SS |
2692 | if (target_overlay_update) |
2693 | { | |
2694 | if (overlay_cache_invalid) | |
2695 | { | |
2696 | overlay_invalidate_all (); | |
2697 | overlay_cache_invalid = 0; | |
2698 | } | |
2699 | if (osect->ovly_mapped == -1) | |
2700 | (*target_overlay_update) (osect); | |
2701 | } | |
2702 | /* fall thru to manual case */ | |
d874f1e2 | 2703 | case ovly_on: /* overlay debugging manual */ |
c906108c SS |
2704 | return osect->ovly_mapped == 1; |
2705 | } | |
2706 | } | |
2707 | ||
2708 | /* Function: section_is_mapped | |
2709 | Returns true if section is an overlay, and is currently mapped. */ | |
2710 | ||
2711 | int | |
fba45db2 | 2712 | section_is_mapped (asection *section) |
c906108c | 2713 | { |
c5aa993b | 2714 | struct objfile *objfile; |
c906108c SS |
2715 | struct obj_section *osect; |
2716 | ||
2717 | if (overlay_debugging) | |
2718 | if (section && section_is_overlay (section)) | |
2719 | ALL_OBJSECTIONS (objfile, osect) | |
2720 | if (osect->the_bfd_section == section) | |
c5aa993b | 2721 | return overlay_is_mapped (osect); |
c906108c SS |
2722 | |
2723 | return 0; | |
2724 | } | |
2725 | ||
2726 | /* Function: pc_in_unmapped_range | |
2727 | If PC falls into the lma range of SECTION, return true, else false. */ | |
2728 | ||
2729 | CORE_ADDR | |
fba45db2 | 2730 | pc_in_unmapped_range (CORE_ADDR pc, asection *section) |
c906108c | 2731 | { |
fbd35540 MS |
2732 | /* FIXME: need bfd *, so we can use bfd_section_lma methods. */ |
2733 | ||
c906108c SS |
2734 | int size; |
2735 | ||
2736 | if (overlay_debugging) | |
2737 | if (section && section_is_overlay (section)) | |
2738 | { | |
2739 | size = bfd_get_section_size_before_reloc (section); | |
2740 | if (section->lma <= pc && pc < section->lma + size) | |
2741 | return 1; | |
2742 | } | |
2743 | return 0; | |
2744 | } | |
2745 | ||
2746 | /* Function: pc_in_mapped_range | |
2747 | If PC falls into the vma range of SECTION, return true, else false. */ | |
2748 | ||
2749 | CORE_ADDR | |
fba45db2 | 2750 | pc_in_mapped_range (CORE_ADDR pc, asection *section) |
c906108c | 2751 | { |
fbd35540 MS |
2752 | /* FIXME: need bfd *, so we can use bfd_section_vma methods. */ |
2753 | ||
c906108c SS |
2754 | int size; |
2755 | ||
2756 | if (overlay_debugging) | |
2757 | if (section && section_is_overlay (section)) | |
2758 | { | |
2759 | size = bfd_get_section_size_before_reloc (section); | |
2760 | if (section->vma <= pc && pc < section->vma + size) | |
2761 | return 1; | |
2762 | } | |
2763 | return 0; | |
2764 | } | |
2765 | ||
9ec8e6a0 JB |
2766 | |
2767 | /* Return true if the mapped ranges of sections A and B overlap, false | |
2768 | otherwise. */ | |
2769 | int | |
2770 | sections_overlap (asection *a, asection *b) | |
2771 | { | |
fbd35540 MS |
2772 | /* FIXME: need bfd *, so we can use bfd_section_vma methods. */ |
2773 | ||
9ec8e6a0 JB |
2774 | CORE_ADDR a_start = a->vma; |
2775 | CORE_ADDR a_end = a->vma + bfd_get_section_size_before_reloc (a); | |
2776 | CORE_ADDR b_start = b->vma; | |
2777 | CORE_ADDR b_end = b->vma + bfd_get_section_size_before_reloc (b); | |
2778 | ||
2779 | return (a_start < b_end && b_start < a_end); | |
2780 | } | |
2781 | ||
c906108c SS |
2782 | /* Function: overlay_unmapped_address (PC, SECTION) |
2783 | Returns the address corresponding to PC in the unmapped (load) range. | |
2784 | May be the same as PC. */ | |
2785 | ||
2786 | CORE_ADDR | |
fba45db2 | 2787 | overlay_unmapped_address (CORE_ADDR pc, asection *section) |
c906108c | 2788 | { |
fbd35540 MS |
2789 | /* FIXME: need bfd *, so we can use bfd_section_lma methods. */ |
2790 | ||
c906108c SS |
2791 | if (overlay_debugging) |
2792 | if (section && section_is_overlay (section) && | |
2793 | pc_in_mapped_range (pc, section)) | |
2794 | return pc + section->lma - section->vma; | |
2795 | ||
2796 | return pc; | |
2797 | } | |
2798 | ||
2799 | /* Function: overlay_mapped_address (PC, SECTION) | |
2800 | Returns the address corresponding to PC in the mapped (runtime) range. | |
2801 | May be the same as PC. */ | |
2802 | ||
2803 | CORE_ADDR | |
fba45db2 | 2804 | overlay_mapped_address (CORE_ADDR pc, asection *section) |
c906108c | 2805 | { |
fbd35540 MS |
2806 | /* FIXME: need bfd *, so we can use bfd_section_vma methods. */ |
2807 | ||
c906108c SS |
2808 | if (overlay_debugging) |
2809 | if (section && section_is_overlay (section) && | |
2810 | pc_in_unmapped_range (pc, section)) | |
2811 | return pc + section->vma - section->lma; | |
2812 | ||
2813 | return pc; | |
2814 | } | |
2815 | ||
2816 | ||
2817 | /* Function: symbol_overlayed_address | |
2818 | Return one of two addresses (relative to the VMA or to the LMA), | |
2819 | depending on whether the section is mapped or not. */ | |
2820 | ||
c5aa993b | 2821 | CORE_ADDR |
fba45db2 | 2822 | symbol_overlayed_address (CORE_ADDR address, asection *section) |
c906108c SS |
2823 | { |
2824 | if (overlay_debugging) | |
2825 | { | |
2826 | /* If the symbol has no section, just return its regular address. */ | |
2827 | if (section == 0) | |
2828 | return address; | |
2829 | /* If the symbol's section is not an overlay, just return its address */ | |
2830 | if (!section_is_overlay (section)) | |
2831 | return address; | |
2832 | /* If the symbol's section is mapped, just return its address */ | |
2833 | if (section_is_mapped (section)) | |
2834 | return address; | |
2835 | /* | |
2836 | * HOWEVER: if the symbol is in an overlay section which is NOT mapped, | |
2837 | * then return its LOADED address rather than its vma address!! | |
2838 | */ | |
2839 | return overlay_unmapped_address (address, section); | |
2840 | } | |
2841 | return address; | |
2842 | } | |
2843 | ||
2844 | /* Function: find_pc_overlay (PC) | |
2845 | Return the best-match overlay section for PC: | |
2846 | If PC matches a mapped overlay section's VMA, return that section. | |
2847 | Else if PC matches an unmapped section's VMA, return that section. | |
2848 | Else if PC matches an unmapped section's LMA, return that section. */ | |
2849 | ||
2850 | asection * | |
fba45db2 | 2851 | find_pc_overlay (CORE_ADDR pc) |
c906108c | 2852 | { |
c5aa993b | 2853 | struct objfile *objfile; |
c906108c SS |
2854 | struct obj_section *osect, *best_match = NULL; |
2855 | ||
2856 | if (overlay_debugging) | |
2857 | ALL_OBJSECTIONS (objfile, osect) | |
2858 | if (section_is_overlay (osect->the_bfd_section)) | |
c5aa993b JM |
2859 | { |
2860 | if (pc_in_mapped_range (pc, osect->the_bfd_section)) | |
2861 | { | |
2862 | if (overlay_is_mapped (osect)) | |
2863 | return osect->the_bfd_section; | |
2864 | else | |
2865 | best_match = osect; | |
2866 | } | |
2867 | else if (pc_in_unmapped_range (pc, osect->the_bfd_section)) | |
2868 | best_match = osect; | |
2869 | } | |
c906108c SS |
2870 | return best_match ? best_match->the_bfd_section : NULL; |
2871 | } | |
2872 | ||
2873 | /* Function: find_pc_mapped_section (PC) | |
2874 | If PC falls into the VMA address range of an overlay section that is | |
2875 | currently marked as MAPPED, return that section. Else return NULL. */ | |
2876 | ||
2877 | asection * | |
fba45db2 | 2878 | find_pc_mapped_section (CORE_ADDR pc) |
c906108c | 2879 | { |
c5aa993b | 2880 | struct objfile *objfile; |
c906108c SS |
2881 | struct obj_section *osect; |
2882 | ||
2883 | if (overlay_debugging) | |
2884 | ALL_OBJSECTIONS (objfile, osect) | |
2885 | if (pc_in_mapped_range (pc, osect->the_bfd_section) && | |
2886 | overlay_is_mapped (osect)) | |
c5aa993b | 2887 | return osect->the_bfd_section; |
c906108c SS |
2888 | |
2889 | return NULL; | |
2890 | } | |
2891 | ||
2892 | /* Function: list_overlays_command | |
2893 | Print a list of mapped sections and their PC ranges */ | |
2894 | ||
2895 | void | |
fba45db2 | 2896 | list_overlays_command (char *args, int from_tty) |
c906108c | 2897 | { |
c5aa993b JM |
2898 | int nmapped = 0; |
2899 | struct objfile *objfile; | |
c906108c SS |
2900 | struct obj_section *osect; |
2901 | ||
2902 | if (overlay_debugging) | |
2903 | ALL_OBJSECTIONS (objfile, osect) | |
2904 | if (overlay_is_mapped (osect)) | |
c5aa993b JM |
2905 | { |
2906 | const char *name; | |
2907 | bfd_vma lma, vma; | |
2908 | int size; | |
2909 | ||
2910 | vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section); | |
2911 | lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section); | |
2912 | size = bfd_get_section_size_before_reloc (osect->the_bfd_section); | |
2913 | name = bfd_section_name (objfile->obfd, osect->the_bfd_section); | |
2914 | ||
2915 | printf_filtered ("Section %s, loaded at ", name); | |
2916 | print_address_numeric (lma, 1, gdb_stdout); | |
2917 | puts_filtered (" - "); | |
2918 | print_address_numeric (lma + size, 1, gdb_stdout); | |
2919 | printf_filtered (", mapped at "); | |
2920 | print_address_numeric (vma, 1, gdb_stdout); | |
2921 | puts_filtered (" - "); | |
2922 | print_address_numeric (vma + size, 1, gdb_stdout); | |
2923 | puts_filtered ("\n"); | |
2924 | ||
2925 | nmapped++; | |
2926 | } | |
c906108c SS |
2927 | if (nmapped == 0) |
2928 | printf_filtered ("No sections are mapped.\n"); | |
2929 | } | |
2930 | ||
2931 | /* Function: map_overlay_command | |
2932 | Mark the named section as mapped (ie. residing at its VMA address). */ | |
2933 | ||
2934 | void | |
fba45db2 | 2935 | map_overlay_command (char *args, int from_tty) |
c906108c | 2936 | { |
c5aa993b JM |
2937 | struct objfile *objfile, *objfile2; |
2938 | struct obj_section *sec, *sec2; | |
2939 | asection *bfdsec; | |
c906108c SS |
2940 | |
2941 | if (!overlay_debugging) | |
515ad16c EZ |
2942 | error ("\ |
2943 | Overlay debugging not enabled. Use either the 'overlay auto' or\n\ | |
2944 | the 'overlay manual' command."); | |
c906108c SS |
2945 | |
2946 | if (args == 0 || *args == 0) | |
2947 | error ("Argument required: name of an overlay section"); | |
2948 | ||
2949 | /* First, find a section matching the user supplied argument */ | |
2950 | ALL_OBJSECTIONS (objfile, sec) | |
2951 | if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args)) | |
c5aa993b JM |
2952 | { |
2953 | /* Now, check to see if the section is an overlay. */ | |
2954 | bfdsec = sec->the_bfd_section; | |
2955 | if (!section_is_overlay (bfdsec)) | |
2956 | continue; /* not an overlay section */ | |
2957 | ||
2958 | /* Mark the overlay as "mapped" */ | |
2959 | sec->ovly_mapped = 1; | |
2960 | ||
2961 | /* Next, make a pass and unmap any sections that are | |
2962 | overlapped by this new section: */ | |
2963 | ALL_OBJSECTIONS (objfile2, sec2) | |
9ec8e6a0 JB |
2964 | if (sec2->ovly_mapped |
2965 | && sec != sec2 | |
2966 | && sec->the_bfd_section != sec2->the_bfd_section | |
2967 | && sections_overlap (sec->the_bfd_section, | |
2968 | sec2->the_bfd_section)) | |
c5aa993b JM |
2969 | { |
2970 | if (info_verbose) | |
2971 | printf_filtered ("Note: section %s unmapped by overlap\n", | |
2972 | bfd_section_name (objfile->obfd, | |
2973 | sec2->the_bfd_section)); | |
2974 | sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2 */ | |
2975 | } | |
2976 | return; | |
2977 | } | |
c906108c SS |
2978 | error ("No overlay section called %s", args); |
2979 | } | |
2980 | ||
2981 | /* Function: unmap_overlay_command | |
2982 | Mark the overlay section as unmapped | |
2983 | (ie. resident in its LMA address range, rather than the VMA range). */ | |
2984 | ||
2985 | void | |
fba45db2 | 2986 | unmap_overlay_command (char *args, int from_tty) |
c906108c | 2987 | { |
c5aa993b | 2988 | struct objfile *objfile; |
c906108c SS |
2989 | struct obj_section *sec; |
2990 | ||
2991 | if (!overlay_debugging) | |
515ad16c EZ |
2992 | error ("\ |
2993 | Overlay debugging not enabled. Use either the 'overlay auto' or\n\ | |
2994 | the 'overlay manual' command."); | |
c906108c SS |
2995 | |
2996 | if (args == 0 || *args == 0) | |
2997 | error ("Argument required: name of an overlay section"); | |
2998 | ||
2999 | /* First, find a section matching the user supplied argument */ | |
3000 | ALL_OBJSECTIONS (objfile, sec) | |
3001 | if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args)) | |
c5aa993b JM |
3002 | { |
3003 | if (!sec->ovly_mapped) | |
3004 | error ("Section %s is not mapped", args); | |
3005 | sec->ovly_mapped = 0; | |
3006 | return; | |
3007 | } | |
c906108c SS |
3008 | error ("No overlay section called %s", args); |
3009 | } | |
3010 | ||
3011 | /* Function: overlay_auto_command | |
3012 | A utility command to turn on overlay debugging. | |
3013 | Possibly this should be done via a set/show command. */ | |
3014 | ||
3015 | static void | |
fba45db2 | 3016 | overlay_auto_command (char *args, int from_tty) |
c906108c | 3017 | { |
d874f1e2 | 3018 | overlay_debugging = ovly_auto; |
1900040c | 3019 | enable_overlay_breakpoints (); |
c906108c SS |
3020 | if (info_verbose) |
3021 | printf_filtered ("Automatic overlay debugging enabled."); | |
3022 | } | |
3023 | ||
3024 | /* Function: overlay_manual_command | |
3025 | A utility command to turn on overlay debugging. | |
3026 | Possibly this should be done via a set/show command. */ | |
3027 | ||
3028 | static void | |
fba45db2 | 3029 | overlay_manual_command (char *args, int from_tty) |
c906108c | 3030 | { |
d874f1e2 | 3031 | overlay_debugging = ovly_on; |
1900040c | 3032 | disable_overlay_breakpoints (); |
c906108c SS |
3033 | if (info_verbose) |
3034 | printf_filtered ("Overlay debugging enabled."); | |
3035 | } | |
3036 | ||
3037 | /* Function: overlay_off_command | |
3038 | A utility command to turn on overlay debugging. | |
3039 | Possibly this should be done via a set/show command. */ | |
3040 | ||
3041 | static void | |
fba45db2 | 3042 | overlay_off_command (char *args, int from_tty) |
c906108c | 3043 | { |
d874f1e2 | 3044 | overlay_debugging = ovly_off; |
1900040c | 3045 | disable_overlay_breakpoints (); |
c906108c SS |
3046 | if (info_verbose) |
3047 | printf_filtered ("Overlay debugging disabled."); | |
3048 | } | |
3049 | ||
3050 | static void | |
fba45db2 | 3051 | overlay_load_command (char *args, int from_tty) |
c906108c SS |
3052 | { |
3053 | if (target_overlay_update) | |
3054 | (*target_overlay_update) (NULL); | |
3055 | else | |
3056 | error ("This target does not know how to read its overlay state."); | |
3057 | } | |
3058 | ||
3059 | /* Function: overlay_command | |
3060 | A place-holder for a mis-typed command */ | |
3061 | ||
3062 | /* Command list chain containing all defined "overlay" subcommands. */ | |
3063 | struct cmd_list_element *overlaylist; | |
3064 | ||
3065 | static void | |
fba45db2 | 3066 | overlay_command (char *args, int from_tty) |
c906108c | 3067 | { |
c5aa993b | 3068 | printf_unfiltered |
c906108c SS |
3069 | ("\"overlay\" must be followed by the name of an overlay command.\n"); |
3070 | help_list (overlaylist, "overlay ", -1, gdb_stdout); | |
3071 | } | |
3072 | ||
3073 | ||
3074 | /* Target Overlays for the "Simplest" overlay manager: | |
3075 | ||
3076 | This is GDB's default target overlay layer. It works with the | |
3077 | minimal overlay manager supplied as an example by Cygnus. The | |
3078 | entry point is via a function pointer "target_overlay_update", | |
3079 | so targets that use a different runtime overlay manager can | |
3080 | substitute their own overlay_update function and take over the | |
3081 | function pointer. | |
3082 | ||
3083 | The overlay_update function pokes around in the target's data structures | |
3084 | to see what overlays are mapped, and updates GDB's overlay mapping with | |
3085 | this information. | |
3086 | ||
3087 | In this simple implementation, the target data structures are as follows: | |
c5aa993b JM |
3088 | unsigned _novlys; /# number of overlay sections #/ |
3089 | unsigned _ovly_table[_novlys][4] = { | |
3090 | {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/ | |
3091 | {..., ..., ..., ...}, | |
3092 | } | |
3093 | unsigned _novly_regions; /# number of overlay regions #/ | |
3094 | unsigned _ovly_region_table[_novly_regions][3] = { | |
3095 | {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/ | |
3096 | {..., ..., ...}, | |
3097 | } | |
c906108c SS |
3098 | These functions will attempt to update GDB's mappedness state in the |
3099 | symbol section table, based on the target's mappedness state. | |
3100 | ||
3101 | To do this, we keep a cached copy of the target's _ovly_table, and | |
3102 | attempt to detect when the cached copy is invalidated. The main | |
3103 | entry point is "simple_overlay_update(SECT), which looks up SECT in | |
3104 | the cached table and re-reads only the entry for that section from | |
3105 | the target (whenever possible). | |
3106 | */ | |
3107 | ||
3108 | /* Cached, dynamically allocated copies of the target data structures: */ | |
c5aa993b | 3109 | static unsigned (*cache_ovly_table)[4] = 0; |
c906108c | 3110 | #if 0 |
c5aa993b | 3111 | static unsigned (*cache_ovly_region_table)[3] = 0; |
c906108c | 3112 | #endif |
c5aa993b | 3113 | static unsigned cache_novlys = 0; |
c906108c | 3114 | #if 0 |
c5aa993b | 3115 | static unsigned cache_novly_regions = 0; |
c906108c SS |
3116 | #endif |
3117 | static CORE_ADDR cache_ovly_table_base = 0; | |
3118 | #if 0 | |
3119 | static CORE_ADDR cache_ovly_region_table_base = 0; | |
3120 | #endif | |
c5aa993b JM |
3121 | enum ovly_index |
3122 | { | |
3123 | VMA, SIZE, LMA, MAPPED | |
3124 | }; | |
c906108c SS |
3125 | #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT) |
3126 | ||
3127 | /* Throw away the cached copy of _ovly_table */ | |
3128 | static void | |
fba45db2 | 3129 | simple_free_overlay_table (void) |
c906108c SS |
3130 | { |
3131 | if (cache_ovly_table) | |
b8c9b27d | 3132 | xfree (cache_ovly_table); |
c5aa993b | 3133 | cache_novlys = 0; |
c906108c SS |
3134 | cache_ovly_table = NULL; |
3135 | cache_ovly_table_base = 0; | |
3136 | } | |
3137 | ||
3138 | #if 0 | |
3139 | /* Throw away the cached copy of _ovly_region_table */ | |
3140 | static void | |
fba45db2 | 3141 | simple_free_overlay_region_table (void) |
c906108c SS |
3142 | { |
3143 | if (cache_ovly_region_table) | |
b8c9b27d | 3144 | xfree (cache_ovly_region_table); |
c5aa993b | 3145 | cache_novly_regions = 0; |
c906108c SS |
3146 | cache_ovly_region_table = NULL; |
3147 | cache_ovly_region_table_base = 0; | |
3148 | } | |
3149 | #endif | |
3150 | ||
3151 | /* Read an array of ints from the target into a local buffer. | |
3152 | Convert to host order. int LEN is number of ints */ | |
3153 | static void | |
fba45db2 | 3154 | read_target_long_array (CORE_ADDR memaddr, unsigned int *myaddr, int len) |
c906108c | 3155 | { |
34c0bd93 | 3156 | /* FIXME (alloca): Not safe if array is very large. */ |
c906108c | 3157 | char *buf = alloca (len * TARGET_LONG_BYTES); |
c5aa993b | 3158 | int i; |
c906108c SS |
3159 | |
3160 | read_memory (memaddr, buf, len * TARGET_LONG_BYTES); | |
3161 | for (i = 0; i < len; i++) | |
c5aa993b | 3162 | myaddr[i] = extract_unsigned_integer (TARGET_LONG_BYTES * i + buf, |
c906108c SS |
3163 | TARGET_LONG_BYTES); |
3164 | } | |
3165 | ||
3166 | /* Find and grab a copy of the target _ovly_table | |
3167 | (and _novlys, which is needed for the table's size) */ | |
c5aa993b | 3168 | static int |
fba45db2 | 3169 | simple_read_overlay_table (void) |
c906108c | 3170 | { |
0d43edd1 | 3171 | struct minimal_symbol *novlys_msym, *ovly_table_msym; |
c906108c SS |
3172 | |
3173 | simple_free_overlay_table (); | |
9b27852e | 3174 | novlys_msym = lookup_minimal_symbol ("_novlys", NULL, NULL); |
0d43edd1 | 3175 | if (! novlys_msym) |
c906108c | 3176 | { |
0d43edd1 JB |
3177 | error ("Error reading inferior's overlay table: " |
3178 | "couldn't find `_novlys' variable\n" | |
3179 | "in inferior. Use `overlay manual' mode."); | |
3180 | return 0; | |
c906108c | 3181 | } |
0d43edd1 | 3182 | |
9b27852e | 3183 | ovly_table_msym = lookup_minimal_symbol ("_ovly_table", NULL, NULL); |
0d43edd1 JB |
3184 | if (! ovly_table_msym) |
3185 | { | |
3186 | error ("Error reading inferior's overlay table: couldn't find " | |
3187 | "`_ovly_table' array\n" | |
3188 | "in inferior. Use `overlay manual' mode."); | |
3189 | return 0; | |
3190 | } | |
3191 | ||
3192 | cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym), 4); | |
3193 | cache_ovly_table | |
3194 | = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table)); | |
3195 | cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (ovly_table_msym); | |
3196 | read_target_long_array (cache_ovly_table_base, | |
3197 | (int *) cache_ovly_table, | |
3198 | cache_novlys * 4); | |
3199 | ||
c5aa993b | 3200 | return 1; /* SUCCESS */ |
c906108c SS |
3201 | } |
3202 | ||
3203 | #if 0 | |
3204 | /* Find and grab a copy of the target _ovly_region_table | |
3205 | (and _novly_regions, which is needed for the table's size) */ | |
c5aa993b | 3206 | static int |
fba45db2 | 3207 | simple_read_overlay_region_table (void) |
c906108c SS |
3208 | { |
3209 | struct minimal_symbol *msym; | |
3210 | ||
3211 | simple_free_overlay_region_table (); | |
9b27852e | 3212 | msym = lookup_minimal_symbol ("_novly_regions", NULL, NULL); |
c906108c SS |
3213 | if (msym != NULL) |
3214 | cache_novly_regions = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4); | |
c5aa993b JM |
3215 | else |
3216 | return 0; /* failure */ | |
c906108c SS |
3217 | cache_ovly_region_table = (void *) xmalloc (cache_novly_regions * 12); |
3218 | if (cache_ovly_region_table != NULL) | |
3219 | { | |
9b27852e | 3220 | msym = lookup_minimal_symbol ("_ovly_region_table", NULL, NULL); |
c906108c SS |
3221 | if (msym != NULL) |
3222 | { | |
3223 | cache_ovly_region_table_base = SYMBOL_VALUE_ADDRESS (msym); | |
c5aa993b JM |
3224 | read_target_long_array (cache_ovly_region_table_base, |
3225 | (int *) cache_ovly_region_table, | |
c906108c SS |
3226 | cache_novly_regions * 3); |
3227 | } | |
c5aa993b JM |
3228 | else |
3229 | return 0; /* failure */ | |
c906108c | 3230 | } |
c5aa993b JM |
3231 | else |
3232 | return 0; /* failure */ | |
3233 | return 1; /* SUCCESS */ | |
c906108c SS |
3234 | } |
3235 | #endif | |
3236 | ||
3237 | /* Function: simple_overlay_update_1 | |
3238 | A helper function for simple_overlay_update. Assuming a cached copy | |
3239 | of _ovly_table exists, look through it to find an entry whose vma, | |
3240 | lma and size match those of OSECT. Re-read the entry and make sure | |
3241 | it still matches OSECT (else the table may no longer be valid). | |
3242 | Set OSECT's mapped state to match the entry. Return: 1 for | |
3243 | success, 0 for failure. */ | |
3244 | ||
3245 | static int | |
fba45db2 | 3246 | simple_overlay_update_1 (struct obj_section *osect) |
c906108c SS |
3247 | { |
3248 | int i, size; | |
fbd35540 MS |
3249 | bfd *obfd = osect->objfile->obfd; |
3250 | asection *bsect = osect->the_bfd_section; | |
c906108c SS |
3251 | |
3252 | size = bfd_get_section_size_before_reloc (osect->the_bfd_section); | |
3253 | for (i = 0; i < cache_novlys; i++) | |
fbd35540 MS |
3254 | if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect) |
3255 | && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect) | |
3256 | /* && cache_ovly_table[i][SIZE] == size */ ) | |
c906108c SS |
3257 | { |
3258 | read_target_long_array (cache_ovly_table_base + i * TARGET_LONG_BYTES, | |
3259 | (int *) cache_ovly_table[i], 4); | |
fbd35540 MS |
3260 | if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect) |
3261 | && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect) | |
3262 | /* && cache_ovly_table[i][SIZE] == size */ ) | |
c906108c SS |
3263 | { |
3264 | osect->ovly_mapped = cache_ovly_table[i][MAPPED]; | |
3265 | return 1; | |
3266 | } | |
fbd35540 | 3267 | else /* Warning! Warning! Target's ovly table has changed! */ |
c906108c SS |
3268 | return 0; |
3269 | } | |
3270 | return 0; | |
3271 | } | |
3272 | ||
3273 | /* Function: simple_overlay_update | |
3274 | If OSECT is NULL, then update all sections' mapped state | |
3275 | (after re-reading the entire target _ovly_table). | |
3276 | If OSECT is non-NULL, then try to find a matching entry in the | |
3277 | cached ovly_table and update only OSECT's mapped state. | |
3278 | If a cached entry can't be found or the cache isn't valid, then | |
3279 | re-read the entire cache, and go ahead and update all sections. */ | |
3280 | ||
3281 | static void | |
fba45db2 | 3282 | simple_overlay_update (struct obj_section *osect) |
c906108c | 3283 | { |
c5aa993b | 3284 | struct objfile *objfile; |
c906108c SS |
3285 | |
3286 | /* Were we given an osect to look up? NULL means do all of them. */ | |
3287 | if (osect) | |
3288 | /* Have we got a cached copy of the target's overlay table? */ | |
3289 | if (cache_ovly_table != NULL) | |
3290 | /* Does its cached location match what's currently in the symtab? */ | |
c5aa993b | 3291 | if (cache_ovly_table_base == |
9b27852e | 3292 | SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL, NULL))) |
c906108c SS |
3293 | /* Then go ahead and try to look up this single section in the cache */ |
3294 | if (simple_overlay_update_1 (osect)) | |
3295 | /* Found it! We're done. */ | |
3296 | return; | |
3297 | ||
3298 | /* Cached table no good: need to read the entire table anew. | |
3299 | Or else we want all the sections, in which case it's actually | |
3300 | more efficient to read the whole table in one block anyway. */ | |
3301 | ||
0d43edd1 JB |
3302 | if (! simple_read_overlay_table ()) |
3303 | return; | |
3304 | ||
c906108c SS |
3305 | /* Now may as well update all sections, even if only one was requested. */ |
3306 | ALL_OBJSECTIONS (objfile, osect) | |
3307 | if (section_is_overlay (osect->the_bfd_section)) | |
c5aa993b JM |
3308 | { |
3309 | int i, size; | |
fbd35540 MS |
3310 | bfd *obfd = osect->objfile->obfd; |
3311 | asection *bsect = osect->the_bfd_section; | |
c5aa993b JM |
3312 | |
3313 | size = bfd_get_section_size_before_reloc (osect->the_bfd_section); | |
3314 | for (i = 0; i < cache_novlys; i++) | |
fbd35540 MS |
3315 | if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect) |
3316 | && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect) | |
3317 | /* && cache_ovly_table[i][SIZE] == size */ ) | |
3318 | { /* obj_section matches i'th entry in ovly_table */ | |
c5aa993b JM |
3319 | osect->ovly_mapped = cache_ovly_table[i][MAPPED]; |
3320 | break; /* finished with inner for loop: break out */ | |
3321 | } | |
3322 | } | |
c906108c SS |
3323 | } |
3324 | ||
3325 | ||
3326 | void | |
fba45db2 | 3327 | _initialize_symfile (void) |
c906108c SS |
3328 | { |
3329 | struct cmd_list_element *c; | |
c5aa993b | 3330 | |
c906108c | 3331 | c = add_cmd ("symbol-file", class_files, symbol_file_command, |
c5aa993b | 3332 | "Load symbol table from executable file FILE.\n\ |
c906108c SS |
3333 | The `file' command can also load symbol tables, as well as setting the file\n\ |
3334 | to execute.", &cmdlist); | |
5ba2abeb | 3335 | set_cmd_completer (c, filename_completer); |
c906108c SS |
3336 | |
3337 | c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command, | |
db162d44 | 3338 | "Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\ |
c906108c | 3339 | Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\ |
2acceee2 | 3340 | ADDR is the starting address of the file's text.\n\ |
db162d44 EZ |
3341 | The optional arguments are section-name section-address pairs and\n\ |
3342 | should be specified if the data and bss segments are not contiguous\n\ | |
d4654627 | 3343 | with the text. SECT is a section name to be loaded at SECT_ADDR.", |
c906108c | 3344 | &cmdlist); |
5ba2abeb | 3345 | set_cmd_completer (c, filename_completer); |
c906108c SS |
3346 | |
3347 | c = add_cmd ("add-shared-symbol-files", class_files, | |
3348 | add_shared_symbol_files_command, | |
3349 | "Load the symbols from shared objects in the dynamic linker's link map.", | |
c5aa993b | 3350 | &cmdlist); |
c906108c SS |
3351 | c = add_alias_cmd ("assf", "add-shared-symbol-files", class_files, 1, |
3352 | &cmdlist); | |
3353 | ||
3354 | c = add_cmd ("load", class_files, load_command, | |
c5aa993b | 3355 | "Dynamically load FILE into the running program, and record its symbols\n\ |
c906108c | 3356 | for access from GDB.", &cmdlist); |
5ba2abeb | 3357 | set_cmd_completer (c, filename_completer); |
c906108c SS |
3358 | |
3359 | add_show_from_set | |
3360 | (add_set_cmd ("symbol-reloading", class_support, var_boolean, | |
c5aa993b JM |
3361 | (char *) &symbol_reloading, |
3362 | "Set dynamic symbol table reloading multiple times in one run.", | |
c906108c SS |
3363 | &setlist), |
3364 | &showlist); | |
3365 | ||
c5aa993b JM |
3366 | add_prefix_cmd ("overlay", class_support, overlay_command, |
3367 | "Commands for debugging overlays.", &overlaylist, | |
c906108c SS |
3368 | "overlay ", 0, &cmdlist); |
3369 | ||
3370 | add_com_alias ("ovly", "overlay", class_alias, 1); | |
3371 | add_com_alias ("ov", "overlay", class_alias, 1); | |
3372 | ||
c5aa993b | 3373 | add_cmd ("map-overlay", class_support, map_overlay_command, |
c906108c SS |
3374 | "Assert that an overlay section is mapped.", &overlaylist); |
3375 | ||
c5aa993b | 3376 | add_cmd ("unmap-overlay", class_support, unmap_overlay_command, |
c906108c SS |
3377 | "Assert that an overlay section is unmapped.", &overlaylist); |
3378 | ||
c5aa993b | 3379 | add_cmd ("list-overlays", class_support, list_overlays_command, |
c906108c SS |
3380 | "List mappings of overlay sections.", &overlaylist); |
3381 | ||
c5aa993b | 3382 | add_cmd ("manual", class_support, overlay_manual_command, |
c906108c | 3383 | "Enable overlay debugging.", &overlaylist); |
c5aa993b | 3384 | add_cmd ("off", class_support, overlay_off_command, |
c906108c | 3385 | "Disable overlay debugging.", &overlaylist); |
c5aa993b | 3386 | add_cmd ("auto", class_support, overlay_auto_command, |
c906108c | 3387 | "Enable automatic overlay debugging.", &overlaylist); |
c5aa993b | 3388 | add_cmd ("load-target", class_support, overlay_load_command, |
c906108c SS |
3389 | "Read the overlay mapping state from the target.", &overlaylist); |
3390 | ||
3391 | /* Filename extension to source language lookup table: */ | |
3392 | init_filename_language_table (); | |
3393 | c = add_set_cmd ("extension-language", class_files, var_string_noescape, | |
c5aa993b | 3394 | (char *) &ext_args, |
c906108c SS |
3395 | "Set mapping between filename extension and source language.\n\ |
3396 | Usage: set extension-language .foo bar", | |
c5aa993b | 3397 | &setlist); |
9f60d481 | 3398 | set_cmd_cfunc (c, set_ext_lang_command); |
c906108c | 3399 | |
c5aa993b | 3400 | add_info ("extensions", info_ext_lang_command, |
c906108c | 3401 | "All filename extensions associated with a source language."); |
917317f4 JM |
3402 | |
3403 | add_show_from_set | |
3404 | (add_set_cmd ("download-write-size", class_obscure, | |
3405 | var_integer, (char *) &download_write_size, | |
3406 | "Set the write size used when downloading a program.\n" | |
3407 | "Only used when downloading a program onto a remote\n" | |
3408 | "target. Specify zero, or a negative value, to disable\n" | |
3409 | "blocked writes. The actual size of each transfer is also\n" | |
3410 | "limited by the size of the target packet and the memory\n" | |
3411 | "cache.\n", | |
3412 | &setlist), | |
3413 | &showlist); | |
c906108c | 3414 | } |