e0a234cd97c6a74cf4e5419753c19914212f360a
[deliverable/binutils-gdb.git] / gdb / symfile.c
1 /* Generic symbol file reading for the GNU debugger, GDB.
2
3 Copyright (C) 1990-2013 Free Software Foundation, Inc.
4
5 Contributed by Cygnus Support, using pieces from other GDB modules.
6
7 This file is part of GDB.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
21
22 #include "defs.h"
23 #include "arch-utils.h"
24 #include "bfdlink.h"
25 #include "symtab.h"
26 #include "gdbtypes.h"
27 #include "gdbcore.h"
28 #include "frame.h"
29 #include "target.h"
30 #include "value.h"
31 #include "symfile.h"
32 #include "objfiles.h"
33 #include "source.h"
34 #include "gdbcmd.h"
35 #include "breakpoint.h"
36 #include "language.h"
37 #include "complaints.h"
38 #include "demangle.h"
39 #include "inferior.h"
40 #include "regcache.h"
41 #include "filenames.h" /* for DOSish file names */
42 #include "gdb-stabs.h"
43 #include "gdb_obstack.h"
44 #include "completer.h"
45 #include "bcache.h"
46 #include "hashtab.h"
47 #include "readline/readline.h"
48 #include "gdb_assert.h"
49 #include "block.h"
50 #include "observer.h"
51 #include "exec.h"
52 #include "parser-defs.h"
53 #include "varobj.h"
54 #include "elf-bfd.h"
55 #include "solib.h"
56 #include "remote.h"
57 #include "stack.h"
58 #include "gdb_bfd.h"
59 #include "cli/cli-utils.h"
60 #include "target.h"
61
62 #include <sys/types.h>
63 #include <fcntl.h>
64 #include "gdb_string.h"
65 #include "gdb_stat.h"
66 #include <ctype.h>
67 #include <time.h>
68 #include <sys/time.h>
69
70 #include "psymtab.h"
71
72 int (*deprecated_ui_load_progress_hook) (const char *section,
73 unsigned long num);
74 void (*deprecated_show_load_progress) (const char *section,
75 unsigned long section_sent,
76 unsigned long section_size,
77 unsigned long total_sent,
78 unsigned long total_size);
79 void (*deprecated_pre_add_symbol_hook) (const char *);
80 void (*deprecated_post_add_symbol_hook) (void);
81
82 static void clear_symtab_users_cleanup (void *ignore);
83
84 /* Global variables owned by this file. */
85 int readnow_symbol_files; /* Read full symbols immediately. */
86
87 /* Functions this file defines. */
88
89 static void load_command (char *, int);
90
91 static void symbol_file_add_main_1 (const char *args, int from_tty, int flags);
92
93 static void add_symbol_file_command (char *, int);
94
95 static const struct sym_fns *find_sym_fns (bfd *);
96
97 static void decrement_reading_symtab (void *);
98
99 static void overlay_invalidate_all (void);
100
101 static void overlay_auto_command (char *, int);
102
103 static void overlay_manual_command (char *, int);
104
105 static void overlay_off_command (char *, int);
106
107 static void overlay_load_command (char *, int);
108
109 static void overlay_command (char *, int);
110
111 static void simple_free_overlay_table (void);
112
113 static void read_target_long_array (CORE_ADDR, unsigned int *, int, int,
114 enum bfd_endian);
115
116 static int simple_read_overlay_table (void);
117
118 static int simple_overlay_update_1 (struct obj_section *);
119
120 static void add_filename_language (char *ext, enum language lang);
121
122 static void info_ext_lang_command (char *args, int from_tty);
123
124 static void init_filename_language_table (void);
125
126 static void symfile_find_segment_sections (struct objfile *objfile);
127
128 void _initialize_symfile (void);
129
130 /* List of all available sym_fns. On gdb startup, each object file reader
131 calls add_symtab_fns() to register information on each format it is
132 prepared to read. */
133
134 typedef struct
135 {
136 /* BFD flavour that we handle. */
137 enum bfd_flavour sym_flavour;
138
139 /* The "vtable" of symbol functions. */
140 const struct sym_fns *sym_fns;
141 } registered_sym_fns;
142
143 DEF_VEC_O (registered_sym_fns);
144
145 static VEC (registered_sym_fns) *symtab_fns = NULL;
146
147 /* If non-zero, shared library symbols will be added automatically
148 when the inferior is created, new libraries are loaded, or when
149 attaching to the inferior. This is almost always what users will
150 want to have happen; but for very large programs, the startup time
151 will be excessive, and so if this is a problem, the user can clear
152 this flag and then add the shared library symbols as needed. Note
153 that there is a potential for confusion, since if the shared
154 library symbols are not loaded, commands like "info fun" will *not*
155 report all the functions that are actually present. */
156
157 int auto_solib_add = 1;
158 \f
159
160 /* True if we are reading a symbol table. */
161
162 int currently_reading_symtab = 0;
163
164 static void
165 decrement_reading_symtab (void *dummy)
166 {
167 currently_reading_symtab--;
168 gdb_assert (currently_reading_symtab >= 0);
169 }
170
171 /* Increment currently_reading_symtab and return a cleanup that can be
172 used to decrement it. */
173
174 struct cleanup *
175 increment_reading_symtab (void)
176 {
177 ++currently_reading_symtab;
178 gdb_assert (currently_reading_symtab > 0);
179 return make_cleanup (decrement_reading_symtab, NULL);
180 }
181
182 /* Remember the lowest-addressed loadable section we've seen.
183 This function is called via bfd_map_over_sections.
184
185 In case of equal vmas, the section with the largest size becomes the
186 lowest-addressed loadable section.
187
188 If the vmas and sizes are equal, the last section is considered the
189 lowest-addressed loadable section. */
190
191 void
192 find_lowest_section (bfd *abfd, asection *sect, void *obj)
193 {
194 asection **lowest = (asection **) obj;
195
196 if (0 == (bfd_get_section_flags (abfd, sect) & (SEC_ALLOC | SEC_LOAD)))
197 return;
198 if (!*lowest)
199 *lowest = sect; /* First loadable section */
200 else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect))
201 *lowest = sect; /* A lower loadable section */
202 else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect)
203 && (bfd_section_size (abfd, (*lowest))
204 <= bfd_section_size (abfd, sect)))
205 *lowest = sect;
206 }
207
208 /* Create a new section_addr_info, with room for NUM_SECTIONS. The
209 new object's 'num_sections' field is set to 0; it must be updated
210 by the caller. */
211
212 struct section_addr_info *
213 alloc_section_addr_info (size_t num_sections)
214 {
215 struct section_addr_info *sap;
216 size_t size;
217
218 size = (sizeof (struct section_addr_info)
219 + sizeof (struct other_sections) * (num_sections - 1));
220 sap = (struct section_addr_info *) xmalloc (size);
221 memset (sap, 0, size);
222
223 return sap;
224 }
225
226 /* Build (allocate and populate) a section_addr_info struct from
227 an existing section table. */
228
229 extern struct section_addr_info *
230 build_section_addr_info_from_section_table (const struct target_section *start,
231 const struct target_section *end)
232 {
233 struct section_addr_info *sap;
234 const struct target_section *stp;
235 int oidx;
236
237 sap = alloc_section_addr_info (end - start);
238
239 for (stp = start, oidx = 0; stp != end; stp++)
240 {
241 struct bfd_section *asect = stp->the_bfd_section;
242 bfd *abfd = asect->owner;
243
244 if (bfd_get_section_flags (abfd, asect) & (SEC_ALLOC | SEC_LOAD)
245 && oidx < end - start)
246 {
247 sap->other[oidx].addr = stp->addr;
248 sap->other[oidx].name = xstrdup (bfd_section_name (abfd, asect));
249 sap->other[oidx].sectindex = gdb_bfd_section_index (abfd, asect);
250 oidx++;
251 }
252 }
253
254 sap->num_sections = oidx;
255
256 return sap;
257 }
258
259 /* Create a section_addr_info from section offsets in ABFD. */
260
261 static struct section_addr_info *
262 build_section_addr_info_from_bfd (bfd *abfd)
263 {
264 struct section_addr_info *sap;
265 int i;
266 struct bfd_section *sec;
267
268 sap = alloc_section_addr_info (bfd_count_sections (abfd));
269 for (i = 0, sec = abfd->sections; sec != NULL; sec = sec->next)
270 if (bfd_get_section_flags (abfd, sec) & (SEC_ALLOC | SEC_LOAD))
271 {
272 sap->other[i].addr = bfd_get_section_vma (abfd, sec);
273 sap->other[i].name = xstrdup (bfd_get_section_name (abfd, sec));
274 sap->other[i].sectindex = gdb_bfd_section_index (abfd, sec);
275 i++;
276 }
277
278 sap->num_sections = i;
279
280 return sap;
281 }
282
283 /* Create a section_addr_info from section offsets in OBJFILE. */
284
285 struct section_addr_info *
286 build_section_addr_info_from_objfile (const struct objfile *objfile)
287 {
288 struct section_addr_info *sap;
289 int i;
290
291 /* Before reread_symbols gets rewritten it is not safe to call:
292 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
293 */
294 sap = build_section_addr_info_from_bfd (objfile->obfd);
295 for (i = 0; i < sap->num_sections; i++)
296 {
297 int sectindex = sap->other[i].sectindex;
298
299 sap->other[i].addr += objfile->section_offsets->offsets[sectindex];
300 }
301 return sap;
302 }
303
304 /* Free all memory allocated by build_section_addr_info_from_section_table. */
305
306 extern void
307 free_section_addr_info (struct section_addr_info *sap)
308 {
309 int idx;
310
311 for (idx = 0; idx < sap->num_sections; idx++)
312 xfree (sap->other[idx].name);
313 xfree (sap);
314 }
315
316 /* Initialize OBJFILE's sect_index_* members. */
317
318 static void
319 init_objfile_sect_indices (struct objfile *objfile)
320 {
321 asection *sect;
322 int i;
323
324 sect = bfd_get_section_by_name (objfile->obfd, ".text");
325 if (sect)
326 objfile->sect_index_text = sect->index;
327
328 sect = bfd_get_section_by_name (objfile->obfd, ".data");
329 if (sect)
330 objfile->sect_index_data = sect->index;
331
332 sect = bfd_get_section_by_name (objfile->obfd, ".bss");
333 if (sect)
334 objfile->sect_index_bss = sect->index;
335
336 sect = bfd_get_section_by_name (objfile->obfd, ".rodata");
337 if (sect)
338 objfile->sect_index_rodata = sect->index;
339
340 /* This is where things get really weird... We MUST have valid
341 indices for the various sect_index_* members or gdb will abort.
342 So if for example, there is no ".text" section, we have to
343 accomodate that. First, check for a file with the standard
344 one or two segments. */
345
346 symfile_find_segment_sections (objfile);
347
348 /* Except when explicitly adding symbol files at some address,
349 section_offsets contains nothing but zeros, so it doesn't matter
350 which slot in section_offsets the individual sect_index_* members
351 index into. So if they are all zero, it is safe to just point
352 all the currently uninitialized indices to the first slot. But
353 beware: if this is the main executable, it may be relocated
354 later, e.g. by the remote qOffsets packet, and then this will
355 be wrong! That's why we try segments first. */
356
357 for (i = 0; i < objfile->num_sections; i++)
358 {
359 if (ANOFFSET (objfile->section_offsets, i) != 0)
360 {
361 break;
362 }
363 }
364 if (i == objfile->num_sections)
365 {
366 if (objfile->sect_index_text == -1)
367 objfile->sect_index_text = 0;
368 if (objfile->sect_index_data == -1)
369 objfile->sect_index_data = 0;
370 if (objfile->sect_index_bss == -1)
371 objfile->sect_index_bss = 0;
372 if (objfile->sect_index_rodata == -1)
373 objfile->sect_index_rodata = 0;
374 }
375 }
376
377 /* The arguments to place_section. */
378
379 struct place_section_arg
380 {
381 struct section_offsets *offsets;
382 CORE_ADDR lowest;
383 };
384
385 /* Find a unique offset to use for loadable section SECT if
386 the user did not provide an offset. */
387
388 static void
389 place_section (bfd *abfd, asection *sect, void *obj)
390 {
391 struct place_section_arg *arg = obj;
392 CORE_ADDR *offsets = arg->offsets->offsets, start_addr;
393 int done;
394 ULONGEST align = ((ULONGEST) 1) << bfd_get_section_alignment (abfd, sect);
395
396 /* We are only interested in allocated sections. */
397 if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0)
398 return;
399
400 /* If the user specified an offset, honor it. */
401 if (offsets[gdb_bfd_section_index (abfd, sect)] != 0)
402 return;
403
404 /* Otherwise, let's try to find a place for the section. */
405 start_addr = (arg->lowest + align - 1) & -align;
406
407 do {
408 asection *cur_sec;
409
410 done = 1;
411
412 for (cur_sec = abfd->sections; cur_sec != NULL; cur_sec = cur_sec->next)
413 {
414 int indx = cur_sec->index;
415
416 /* We don't need to compare against ourself. */
417 if (cur_sec == sect)
418 continue;
419
420 /* We can only conflict with allocated sections. */
421 if ((bfd_get_section_flags (abfd, cur_sec) & SEC_ALLOC) == 0)
422 continue;
423
424 /* If the section offset is 0, either the section has not been placed
425 yet, or it was the lowest section placed (in which case LOWEST
426 will be past its end). */
427 if (offsets[indx] == 0)
428 continue;
429
430 /* If this section would overlap us, then we must move up. */
431 if (start_addr + bfd_get_section_size (sect) > offsets[indx]
432 && start_addr < offsets[indx] + bfd_get_section_size (cur_sec))
433 {
434 start_addr = offsets[indx] + bfd_get_section_size (cur_sec);
435 start_addr = (start_addr + align - 1) & -align;
436 done = 0;
437 break;
438 }
439
440 /* Otherwise, we appear to be OK. So far. */
441 }
442 }
443 while (!done);
444
445 offsets[gdb_bfd_section_index (abfd, sect)] = start_addr;
446 arg->lowest = start_addr + bfd_get_section_size (sect);
447 }
448
449 /* Store struct section_addr_info as prepared (made relative and with SECTINDEX
450 filled-in) by addr_info_make_relative into SECTION_OFFSETS of NUM_SECTIONS
451 entries. */
452
453 void
454 relative_addr_info_to_section_offsets (struct section_offsets *section_offsets,
455 int num_sections,
456 const struct section_addr_info *addrs)
457 {
458 int i;
459
460 memset (section_offsets, 0, SIZEOF_N_SECTION_OFFSETS (num_sections));
461
462 /* Now calculate offsets for section that were specified by the caller. */
463 for (i = 0; i < addrs->num_sections; i++)
464 {
465 const struct other_sections *osp;
466
467 osp = &addrs->other[i];
468 if (osp->sectindex == -1)
469 continue;
470
471 /* Record all sections in offsets. */
472 /* The section_offsets in the objfile are here filled in using
473 the BFD index. */
474 section_offsets->offsets[osp->sectindex] = osp->addr;
475 }
476 }
477
478 /* Transform section name S for a name comparison. prelink can split section
479 `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly
480 prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address
481 of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss'
482 (`.sbss') section has invalid (increased) virtual address. */
483
484 static const char *
485 addr_section_name (const char *s)
486 {
487 if (strcmp (s, ".dynbss") == 0)
488 return ".bss";
489 if (strcmp (s, ".sdynbss") == 0)
490 return ".sbss";
491
492 return s;
493 }
494
495 /* qsort comparator for addrs_section_sort. Sort entries in ascending order by
496 their (name, sectindex) pair. sectindex makes the sort by name stable. */
497
498 static int
499 addrs_section_compar (const void *ap, const void *bp)
500 {
501 const struct other_sections *a = *((struct other_sections **) ap);
502 const struct other_sections *b = *((struct other_sections **) bp);
503 int retval;
504
505 retval = strcmp (addr_section_name (a->name), addr_section_name (b->name));
506 if (retval)
507 return retval;
508
509 return a->sectindex - b->sectindex;
510 }
511
512 /* Provide sorted array of pointers to sections of ADDRS. The array is
513 terminated by NULL. Caller is responsible to call xfree for it. */
514
515 static struct other_sections **
516 addrs_section_sort (struct section_addr_info *addrs)
517 {
518 struct other_sections **array;
519 int i;
520
521 /* `+ 1' for the NULL terminator. */
522 array = xmalloc (sizeof (*array) * (addrs->num_sections + 1));
523 for (i = 0; i < addrs->num_sections; i++)
524 array[i] = &addrs->other[i];
525 array[i] = NULL;
526
527 qsort (array, i, sizeof (*array), addrs_section_compar);
528
529 return array;
530 }
531
532 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
533 also SECTINDEXes specific to ABFD there. This function can be used to
534 rebase ADDRS to start referencing different BFD than before. */
535
536 void
537 addr_info_make_relative (struct section_addr_info *addrs, bfd *abfd)
538 {
539 asection *lower_sect;
540 CORE_ADDR lower_offset;
541 int i;
542 struct cleanup *my_cleanup;
543 struct section_addr_info *abfd_addrs;
544 struct other_sections **addrs_sorted, **abfd_addrs_sorted;
545 struct other_sections **addrs_to_abfd_addrs;
546
547 /* Find lowest loadable section to be used as starting point for
548 continguous sections. */
549 lower_sect = NULL;
550 bfd_map_over_sections (abfd, find_lowest_section, &lower_sect);
551 if (lower_sect == NULL)
552 {
553 warning (_("no loadable sections found in added symbol-file %s"),
554 bfd_get_filename (abfd));
555 lower_offset = 0;
556 }
557 else
558 lower_offset = bfd_section_vma (bfd_get_filename (abfd), lower_sect);
559
560 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
561 in ABFD. Section names are not unique - there can be multiple sections of
562 the same name. Also the sections of the same name do not have to be
563 adjacent to each other. Some sections may be present only in one of the
564 files. Even sections present in both files do not have to be in the same
565 order.
566
567 Use stable sort by name for the sections in both files. Then linearly
568 scan both lists matching as most of the entries as possible. */
569
570 addrs_sorted = addrs_section_sort (addrs);
571 my_cleanup = make_cleanup (xfree, addrs_sorted);
572
573 abfd_addrs = build_section_addr_info_from_bfd (abfd);
574 make_cleanup_free_section_addr_info (abfd_addrs);
575 abfd_addrs_sorted = addrs_section_sort (abfd_addrs);
576 make_cleanup (xfree, abfd_addrs_sorted);
577
578 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and
579 ABFD_ADDRS_SORTED. */
580
581 addrs_to_abfd_addrs = xzalloc (sizeof (*addrs_to_abfd_addrs)
582 * addrs->num_sections);
583 make_cleanup (xfree, addrs_to_abfd_addrs);
584
585 while (*addrs_sorted)
586 {
587 const char *sect_name = addr_section_name ((*addrs_sorted)->name);
588
589 while (*abfd_addrs_sorted
590 && strcmp (addr_section_name ((*abfd_addrs_sorted)->name),
591 sect_name) < 0)
592 abfd_addrs_sorted++;
593
594 if (*abfd_addrs_sorted
595 && strcmp (addr_section_name ((*abfd_addrs_sorted)->name),
596 sect_name) == 0)
597 {
598 int index_in_addrs;
599
600 /* Make the found item directly addressable from ADDRS. */
601 index_in_addrs = *addrs_sorted - addrs->other;
602 gdb_assert (addrs_to_abfd_addrs[index_in_addrs] == NULL);
603 addrs_to_abfd_addrs[index_in_addrs] = *abfd_addrs_sorted;
604
605 /* Never use the same ABFD entry twice. */
606 abfd_addrs_sorted++;
607 }
608
609 addrs_sorted++;
610 }
611
612 /* Calculate offsets for the loadable sections.
613 FIXME! Sections must be in order of increasing loadable section
614 so that contiguous sections can use the lower-offset!!!
615
616 Adjust offsets if the segments are not contiguous.
617 If the section is contiguous, its offset should be set to
618 the offset of the highest loadable section lower than it
619 (the loadable section directly below it in memory).
620 this_offset = lower_offset = lower_addr - lower_orig_addr */
621
622 for (i = 0; i < addrs->num_sections; i++)
623 {
624 struct other_sections *sect = addrs_to_abfd_addrs[i];
625
626 if (sect)
627 {
628 /* This is the index used by BFD. */
629 addrs->other[i].sectindex = sect->sectindex;
630
631 if (addrs->other[i].addr != 0)
632 {
633 addrs->other[i].addr -= sect->addr;
634 lower_offset = addrs->other[i].addr;
635 }
636 else
637 addrs->other[i].addr = lower_offset;
638 }
639 else
640 {
641 /* addr_section_name transformation is not used for SECT_NAME. */
642 const char *sect_name = addrs->other[i].name;
643
644 /* This section does not exist in ABFD, which is normally
645 unexpected and we want to issue a warning.
646
647 However, the ELF prelinker does create a few sections which are
648 marked in the main executable as loadable (they are loaded in
649 memory from the DYNAMIC segment) and yet are not present in
650 separate debug info files. This is fine, and should not cause
651 a warning. Shared libraries contain just the section
652 ".gnu.liblist" but it is not marked as loadable there. There is
653 no other way to identify them than by their name as the sections
654 created by prelink have no special flags.
655
656 For the sections `.bss' and `.sbss' see addr_section_name. */
657
658 if (!(strcmp (sect_name, ".gnu.liblist") == 0
659 || strcmp (sect_name, ".gnu.conflict") == 0
660 || (strcmp (sect_name, ".bss") == 0
661 && i > 0
662 && strcmp (addrs->other[i - 1].name, ".dynbss") == 0
663 && addrs_to_abfd_addrs[i - 1] != NULL)
664 || (strcmp (sect_name, ".sbss") == 0
665 && i > 0
666 && strcmp (addrs->other[i - 1].name, ".sdynbss") == 0
667 && addrs_to_abfd_addrs[i - 1] != NULL)))
668 warning (_("section %s not found in %s"), sect_name,
669 bfd_get_filename (abfd));
670
671 addrs->other[i].addr = 0;
672 addrs->other[i].sectindex = -1;
673 }
674 }
675
676 do_cleanups (my_cleanup);
677 }
678
679 /* Parse the user's idea of an offset for dynamic linking, into our idea
680 of how to represent it for fast symbol reading. This is the default
681 version of the sym_fns.sym_offsets function for symbol readers that
682 don't need to do anything special. It allocates a section_offsets table
683 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
684
685 void
686 default_symfile_offsets (struct objfile *objfile,
687 const struct section_addr_info *addrs)
688 {
689 objfile->num_sections = gdb_bfd_count_sections (objfile->obfd);
690 objfile->section_offsets = (struct section_offsets *)
691 obstack_alloc (&objfile->objfile_obstack,
692 SIZEOF_N_SECTION_OFFSETS (objfile->num_sections));
693 relative_addr_info_to_section_offsets (objfile->section_offsets,
694 objfile->num_sections, addrs);
695
696 /* For relocatable files, all loadable sections will start at zero.
697 The zero is meaningless, so try to pick arbitrary addresses such
698 that no loadable sections overlap. This algorithm is quadratic,
699 but the number of sections in a single object file is generally
700 small. */
701 if ((bfd_get_file_flags (objfile->obfd) & (EXEC_P | DYNAMIC)) == 0)
702 {
703 struct place_section_arg arg;
704 bfd *abfd = objfile->obfd;
705 asection *cur_sec;
706
707 for (cur_sec = abfd->sections; cur_sec != NULL; cur_sec = cur_sec->next)
708 /* We do not expect this to happen; just skip this step if the
709 relocatable file has a section with an assigned VMA. */
710 if (bfd_section_vma (abfd, cur_sec) != 0)
711 break;
712
713 if (cur_sec == NULL)
714 {
715 CORE_ADDR *offsets = objfile->section_offsets->offsets;
716
717 /* Pick non-overlapping offsets for sections the user did not
718 place explicitly. */
719 arg.offsets = objfile->section_offsets;
720 arg.lowest = 0;
721 bfd_map_over_sections (objfile->obfd, place_section, &arg);
722
723 /* Correctly filling in the section offsets is not quite
724 enough. Relocatable files have two properties that
725 (most) shared objects do not:
726
727 - Their debug information will contain relocations. Some
728 shared libraries do also, but many do not, so this can not
729 be assumed.
730
731 - If there are multiple code sections they will be loaded
732 at different relative addresses in memory than they are
733 in the objfile, since all sections in the file will start
734 at address zero.
735
736 Because GDB has very limited ability to map from an
737 address in debug info to the correct code section,
738 it relies on adding SECT_OFF_TEXT to things which might be
739 code. If we clear all the section offsets, and set the
740 section VMAs instead, then symfile_relocate_debug_section
741 will return meaningful debug information pointing at the
742 correct sections.
743
744 GDB has too many different data structures for section
745 addresses - a bfd, objfile, and so_list all have section
746 tables, as does exec_ops. Some of these could probably
747 be eliminated. */
748
749 for (cur_sec = abfd->sections; cur_sec != NULL;
750 cur_sec = cur_sec->next)
751 {
752 if ((bfd_get_section_flags (abfd, cur_sec) & SEC_ALLOC) == 0)
753 continue;
754
755 bfd_set_section_vma (abfd, cur_sec, offsets[cur_sec->index]);
756 exec_set_section_address (bfd_get_filename (abfd),
757 cur_sec->index,
758 offsets[cur_sec->index]);
759 offsets[cur_sec->index] = 0;
760 }
761 }
762 }
763
764 /* Remember the bfd indexes for the .text, .data, .bss and
765 .rodata sections. */
766 init_objfile_sect_indices (objfile);
767 }
768
769 /* Divide the file into segments, which are individual relocatable units.
770 This is the default version of the sym_fns.sym_segments function for
771 symbol readers that do not have an explicit representation of segments.
772 It assumes that object files do not have segments, and fully linked
773 files have a single segment. */
774
775 struct symfile_segment_data *
776 default_symfile_segments (bfd *abfd)
777 {
778 int num_sections, i;
779 asection *sect;
780 struct symfile_segment_data *data;
781 CORE_ADDR low, high;
782
783 /* Relocatable files contain enough information to position each
784 loadable section independently; they should not be relocated
785 in segments. */
786 if ((bfd_get_file_flags (abfd) & (EXEC_P | DYNAMIC)) == 0)
787 return NULL;
788
789 /* Make sure there is at least one loadable section in the file. */
790 for (sect = abfd->sections; sect != NULL; sect = sect->next)
791 {
792 if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0)
793 continue;
794
795 break;
796 }
797 if (sect == NULL)
798 return NULL;
799
800 low = bfd_get_section_vma (abfd, sect);
801 high = low + bfd_get_section_size (sect);
802
803 data = XZALLOC (struct symfile_segment_data);
804 data->num_segments = 1;
805 data->segment_bases = XCALLOC (1, CORE_ADDR);
806 data->segment_sizes = XCALLOC (1, CORE_ADDR);
807
808 num_sections = bfd_count_sections (abfd);
809 data->segment_info = XCALLOC (num_sections, int);
810
811 for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next)
812 {
813 CORE_ADDR vma;
814
815 if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0)
816 continue;
817
818 vma = bfd_get_section_vma (abfd, sect);
819 if (vma < low)
820 low = vma;
821 if (vma + bfd_get_section_size (sect) > high)
822 high = vma + bfd_get_section_size (sect);
823
824 data->segment_info[i] = 1;
825 }
826
827 data->segment_bases[0] = low;
828 data->segment_sizes[0] = high - low;
829
830 return data;
831 }
832
833 /* This is a convenience function to call sym_read for OBJFILE and
834 possibly force the partial symbols to be read. */
835
836 static void
837 read_symbols (struct objfile *objfile, int add_flags)
838 {
839 (*objfile->sf->sym_read) (objfile, add_flags);
840
841 /* find_separate_debug_file_in_section should be called only if there is
842 single binary with no existing separate debug info file. */
843 if (!objfile_has_partial_symbols (objfile)
844 && objfile->separate_debug_objfile == NULL
845 && objfile->separate_debug_objfile_backlink == NULL)
846 {
847 bfd *abfd = find_separate_debug_file_in_section (objfile);
848 struct cleanup *cleanup = make_cleanup_bfd_unref (abfd);
849
850 if (abfd != NULL)
851 {
852 /* find_separate_debug_file_in_section uses the same filename for the
853 virtual section-as-bfd like the bfd filename containing the
854 section. Therefore use also non-canonical name form for the same
855 file containing the section. */
856 symbol_file_add_separate (abfd, objfile->original_name, add_flags,
857 objfile);
858 }
859
860 do_cleanups (cleanup);
861 }
862 if ((add_flags & SYMFILE_NO_READ) == 0)
863 require_partial_symbols (objfile, 0);
864 }
865
866 /* Initialize entry point information for this objfile. */
867
868 static void
869 init_entry_point_info (struct objfile *objfile)
870 {
871 /* Save startup file's range of PC addresses to help blockframe.c
872 decide where the bottom of the stack is. */
873
874 if (bfd_get_file_flags (objfile->obfd) & EXEC_P)
875 {
876 /* Executable file -- record its entry point so we'll recognize
877 the startup file because it contains the entry point. */
878 objfile->ei.entry_point = bfd_get_start_address (objfile->obfd);
879 objfile->ei.entry_point_p = 1;
880 }
881 else if (bfd_get_file_flags (objfile->obfd) & DYNAMIC
882 && bfd_get_start_address (objfile->obfd) != 0)
883 {
884 /* Some shared libraries may have entry points set and be
885 runnable. There's no clear way to indicate this, so just check
886 for values other than zero. */
887 objfile->ei.entry_point = bfd_get_start_address (objfile->obfd);
888 objfile->ei.entry_point_p = 1;
889 }
890 else
891 {
892 /* Examination of non-executable.o files. Short-circuit this stuff. */
893 objfile->ei.entry_point_p = 0;
894 }
895
896 if (objfile->ei.entry_point_p)
897 {
898 CORE_ADDR entry_point = objfile->ei.entry_point;
899
900 /* Make certain that the address points at real code, and not a
901 function descriptor. */
902 entry_point
903 = gdbarch_convert_from_func_ptr_addr (get_objfile_arch (objfile),
904 entry_point,
905 &current_target);
906
907 /* Remove any ISA markers, so that this matches entries in the
908 symbol table. */
909 objfile->ei.entry_point
910 = gdbarch_addr_bits_remove (get_objfile_arch (objfile), entry_point);
911 }
912 }
913
914 /* Process a symbol file, as either the main file or as a dynamically
915 loaded file.
916
917 This function does not set the OBJFILE's entry-point info.
918
919 OBJFILE is where the symbols are to be read from.
920
921 ADDRS is the list of section load addresses. If the user has given
922 an 'add-symbol-file' command, then this is the list of offsets and
923 addresses he or she provided as arguments to the command; or, if
924 we're handling a shared library, these are the actual addresses the
925 sections are loaded at, according to the inferior's dynamic linker
926 (as gleaned by GDB's shared library code). We convert each address
927 into an offset from the section VMA's as it appears in the object
928 file, and then call the file's sym_offsets function to convert this
929 into a format-specific offset table --- a `struct section_offsets'.
930
931 ADD_FLAGS encodes verbosity level, whether this is main symbol or
932 an extra symbol file such as dynamically loaded code, and wether
933 breakpoint reset should be deferred. */
934
935 static void
936 syms_from_objfile_1 (struct objfile *objfile,
937 struct section_addr_info *addrs,
938 int add_flags)
939 {
940 struct section_addr_info *local_addr = NULL;
941 struct cleanup *old_chain;
942 const int mainline = add_flags & SYMFILE_MAINLINE;
943
944 objfile_set_sym_fns (objfile, find_sym_fns (objfile->obfd));
945
946 if (objfile->sf == NULL)
947 {
948 /* No symbols to load, but we still need to make sure
949 that the section_offsets table is allocated. */
950 int num_sections = gdb_bfd_count_sections (objfile->obfd);
951 size_t size = SIZEOF_N_SECTION_OFFSETS (num_sections);
952
953 objfile->num_sections = num_sections;
954 objfile->section_offsets
955 = obstack_alloc (&objfile->objfile_obstack, size);
956 memset (objfile->section_offsets, 0, size);
957 return;
958 }
959
960 /* Make sure that partially constructed symbol tables will be cleaned up
961 if an error occurs during symbol reading. */
962 old_chain = make_cleanup_free_objfile (objfile);
963
964 /* If ADDRS is NULL, put together a dummy address list.
965 We now establish the convention that an addr of zero means
966 no load address was specified. */
967 if (! addrs)
968 {
969 local_addr = alloc_section_addr_info (1);
970 make_cleanup (xfree, local_addr);
971 addrs = local_addr;
972 }
973
974 if (mainline)
975 {
976 /* We will modify the main symbol table, make sure that all its users
977 will be cleaned up if an error occurs during symbol reading. */
978 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
979
980 /* Since no error yet, throw away the old symbol table. */
981
982 if (symfile_objfile != NULL)
983 {
984 free_objfile (symfile_objfile);
985 gdb_assert (symfile_objfile == NULL);
986 }
987
988 /* Currently we keep symbols from the add-symbol-file command.
989 If the user wants to get rid of them, they should do "symbol-file"
990 without arguments first. Not sure this is the best behavior
991 (PR 2207). */
992
993 (*objfile->sf->sym_new_init) (objfile);
994 }
995
996 /* Convert addr into an offset rather than an absolute address.
997 We find the lowest address of a loaded segment in the objfile,
998 and assume that <addr> is where that got loaded.
999
1000 We no longer warn if the lowest section is not a text segment (as
1001 happens for the PA64 port. */
1002 if (addrs->num_sections > 0)
1003 addr_info_make_relative (addrs, objfile->obfd);
1004
1005 /* Initialize symbol reading routines for this objfile, allow complaints to
1006 appear for this new file, and record how verbose to be, then do the
1007 initial symbol reading for this file. */
1008
1009 (*objfile->sf->sym_init) (objfile);
1010 clear_complaints (&symfile_complaints, 1, add_flags & SYMFILE_VERBOSE);
1011
1012 (*objfile->sf->sym_offsets) (objfile, addrs);
1013
1014 read_symbols (objfile, add_flags);
1015
1016 /* Discard cleanups as symbol reading was successful. */
1017
1018 discard_cleanups (old_chain);
1019 xfree (local_addr);
1020 }
1021
1022 /* Same as syms_from_objfile_1, but also initializes the objfile
1023 entry-point info. */
1024
1025 static void
1026 syms_from_objfile (struct objfile *objfile,
1027 struct section_addr_info *addrs,
1028 int add_flags)
1029 {
1030 syms_from_objfile_1 (objfile, addrs, add_flags);
1031 init_entry_point_info (objfile);
1032 }
1033
1034 /* Perform required actions after either reading in the initial
1035 symbols for a new objfile, or mapping in the symbols from a reusable
1036 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
1037
1038 void
1039 new_symfile_objfile (struct objfile *objfile, int add_flags)
1040 {
1041 /* If this is the main symbol file we have to clean up all users of the
1042 old main symbol file. Otherwise it is sufficient to fixup all the
1043 breakpoints that may have been redefined by this symbol file. */
1044 if (add_flags & SYMFILE_MAINLINE)
1045 {
1046 /* OK, make it the "real" symbol file. */
1047 symfile_objfile = objfile;
1048
1049 clear_symtab_users (add_flags);
1050 }
1051 else if ((add_flags & SYMFILE_DEFER_BP_RESET) == 0)
1052 {
1053 breakpoint_re_set ();
1054 }
1055
1056 /* We're done reading the symbol file; finish off complaints. */
1057 clear_complaints (&symfile_complaints, 0, add_flags & SYMFILE_VERBOSE);
1058 }
1059
1060 /* Process a symbol file, as either the main file or as a dynamically
1061 loaded file.
1062
1063 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1064 A new reference is acquired by this function.
1065
1066 For NAME description see allocate_objfile's definition.
1067
1068 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1069 extra, such as dynamically loaded code, and what to do with breakpoins.
1070
1071 ADDRS is as described for syms_from_objfile_1, above.
1072 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1073
1074 PARENT is the original objfile if ABFD is a separate debug info file.
1075 Otherwise PARENT is NULL.
1076
1077 Upon success, returns a pointer to the objfile that was added.
1078 Upon failure, jumps back to command level (never returns). */
1079
1080 static struct objfile *
1081 symbol_file_add_with_addrs (bfd *abfd, const char *name, int add_flags,
1082 struct section_addr_info *addrs,
1083 int flags, struct objfile *parent)
1084 {
1085 struct objfile *objfile;
1086 const int from_tty = add_flags & SYMFILE_VERBOSE;
1087 const int mainline = add_flags & SYMFILE_MAINLINE;
1088 const int should_print = ((from_tty || info_verbose)
1089 && (readnow_symbol_files
1090 || (add_flags & SYMFILE_NO_READ) == 0));
1091
1092 if (readnow_symbol_files)
1093 {
1094 flags |= OBJF_READNOW;
1095 add_flags &= ~SYMFILE_NO_READ;
1096 }
1097
1098 /* Give user a chance to burp if we'd be
1099 interactively wiping out any existing symbols. */
1100
1101 if ((have_full_symbols () || have_partial_symbols ())
1102 && mainline
1103 && from_tty
1104 && !query (_("Load new symbol table from \"%s\"? "), name))
1105 error (_("Not confirmed."));
1106
1107 objfile = allocate_objfile (abfd, name,
1108 flags | (mainline ? OBJF_MAINLINE : 0));
1109
1110 if (parent)
1111 add_separate_debug_objfile (objfile, parent);
1112
1113 /* We either created a new mapped symbol table, mapped an existing
1114 symbol table file which has not had initial symbol reading
1115 performed, or need to read an unmapped symbol table. */
1116 if (should_print)
1117 {
1118 if (deprecated_pre_add_symbol_hook)
1119 deprecated_pre_add_symbol_hook (name);
1120 else
1121 {
1122 printf_unfiltered (_("Reading symbols from %s..."), name);
1123 wrap_here ("");
1124 gdb_flush (gdb_stdout);
1125 }
1126 }
1127 syms_from_objfile (objfile, addrs, add_flags);
1128
1129 /* We now have at least a partial symbol table. Check to see if the
1130 user requested that all symbols be read on initial access via either
1131 the gdb startup command line or on a per symbol file basis. Expand
1132 all partial symbol tables for this objfile if so. */
1133
1134 if ((flags & OBJF_READNOW))
1135 {
1136 if (should_print)
1137 {
1138 printf_unfiltered (_("expanding to full symbols..."));
1139 wrap_here ("");
1140 gdb_flush (gdb_stdout);
1141 }
1142
1143 if (objfile->sf)
1144 objfile->sf->qf->expand_all_symtabs (objfile);
1145 }
1146
1147 if (should_print && !objfile_has_symbols (objfile))
1148 {
1149 wrap_here ("");
1150 printf_unfiltered (_("(no debugging symbols found)..."));
1151 wrap_here ("");
1152 }
1153
1154 if (should_print)
1155 {
1156 if (deprecated_post_add_symbol_hook)
1157 deprecated_post_add_symbol_hook ();
1158 else
1159 printf_unfiltered (_("done.\n"));
1160 }
1161
1162 /* We print some messages regardless of whether 'from_tty ||
1163 info_verbose' is true, so make sure they go out at the right
1164 time. */
1165 gdb_flush (gdb_stdout);
1166
1167 if (objfile->sf == NULL)
1168 {
1169 observer_notify_new_objfile (objfile);
1170 return objfile; /* No symbols. */
1171 }
1172
1173 new_symfile_objfile (objfile, add_flags);
1174
1175 observer_notify_new_objfile (objfile);
1176
1177 bfd_cache_close_all ();
1178 return (objfile);
1179 }
1180
1181 /* Add BFD as a separate debug file for OBJFILE. For NAME description
1182 see allocate_objfile's definition. */
1183
1184 void
1185 symbol_file_add_separate (bfd *bfd, const char *name, int symfile_flags,
1186 struct objfile *objfile)
1187 {
1188 struct objfile *new_objfile;
1189 struct section_addr_info *sap;
1190 struct cleanup *my_cleanup;
1191
1192 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1193 because sections of BFD may not match sections of OBJFILE and because
1194 vma may have been modified by tools such as prelink. */
1195 sap = build_section_addr_info_from_objfile (objfile);
1196 my_cleanup = make_cleanup_free_section_addr_info (sap);
1197
1198 new_objfile = symbol_file_add_with_addrs
1199 (bfd, name, symfile_flags, sap,
1200 objfile->flags & (OBJF_REORDERED | OBJF_SHARED | OBJF_READNOW
1201 | OBJF_USERLOADED),
1202 objfile);
1203
1204 do_cleanups (my_cleanup);
1205 }
1206
1207 /* Process the symbol file ABFD, as either the main file or as a
1208 dynamically loaded file.
1209 See symbol_file_add_with_addrs's comments for details. */
1210
1211 struct objfile *
1212 symbol_file_add_from_bfd (bfd *abfd, const char *name, int add_flags,
1213 struct section_addr_info *addrs,
1214 int flags, struct objfile *parent)
1215 {
1216 return symbol_file_add_with_addrs (abfd, name, add_flags, addrs, flags,
1217 parent);
1218 }
1219
1220 /* Process a symbol file, as either the main file or as a dynamically
1221 loaded file. See symbol_file_add_with_addrs's comments for details. */
1222
1223 struct objfile *
1224 symbol_file_add (const char *name, int add_flags,
1225 struct section_addr_info *addrs, int flags)
1226 {
1227 bfd *bfd = symfile_bfd_open (name);
1228 struct cleanup *cleanup = make_cleanup_bfd_unref (bfd);
1229 struct objfile *objf;
1230
1231 objf = symbol_file_add_from_bfd (bfd, name, add_flags, addrs, flags, NULL);
1232 do_cleanups (cleanup);
1233 return objf;
1234 }
1235
1236 /* Call symbol_file_add() with default values and update whatever is
1237 affected by the loading of a new main().
1238 Used when the file is supplied in the gdb command line
1239 and by some targets with special loading requirements.
1240 The auxiliary function, symbol_file_add_main_1(), has the flags
1241 argument for the switches that can only be specified in the symbol_file
1242 command itself. */
1243
1244 void
1245 symbol_file_add_main (const char *args, int from_tty)
1246 {
1247 symbol_file_add_main_1 (args, from_tty, 0);
1248 }
1249
1250 static void
1251 symbol_file_add_main_1 (const char *args, int from_tty, int flags)
1252 {
1253 const int add_flags = (current_inferior ()->symfile_flags
1254 | SYMFILE_MAINLINE | (from_tty ? SYMFILE_VERBOSE : 0));
1255
1256 symbol_file_add (args, add_flags, NULL, flags);
1257
1258 /* Getting new symbols may change our opinion about
1259 what is frameless. */
1260 reinit_frame_cache ();
1261
1262 if ((flags & SYMFILE_NO_READ) == 0)
1263 set_initial_language ();
1264 }
1265
1266 void
1267 symbol_file_clear (int from_tty)
1268 {
1269 if ((have_full_symbols () || have_partial_symbols ())
1270 && from_tty
1271 && (symfile_objfile
1272 ? !query (_("Discard symbol table from `%s'? "),
1273 objfile_name (symfile_objfile))
1274 : !query (_("Discard symbol table? "))))
1275 error (_("Not confirmed."));
1276
1277 /* solib descriptors may have handles to objfiles. Wipe them before their
1278 objfiles get stale by free_all_objfiles. */
1279 no_shared_libraries (NULL, from_tty);
1280
1281 free_all_objfiles ();
1282
1283 gdb_assert (symfile_objfile == NULL);
1284 if (from_tty)
1285 printf_unfiltered (_("No symbol file now.\n"));
1286 }
1287
1288 static int
1289 separate_debug_file_exists (const char *name, unsigned long crc,
1290 struct objfile *parent_objfile)
1291 {
1292 unsigned long file_crc;
1293 int file_crc_p;
1294 bfd *abfd;
1295 struct stat parent_stat, abfd_stat;
1296 int verified_as_different;
1297
1298 /* Find a separate debug info file as if symbols would be present in
1299 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1300 section can contain just the basename of PARENT_OBJFILE without any
1301 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1302 the separate debug infos with the same basename can exist. */
1303
1304 if (filename_cmp (name, objfile_name (parent_objfile)) == 0)
1305 return 0;
1306
1307 abfd = gdb_bfd_open_maybe_remote (name);
1308
1309 if (!abfd)
1310 return 0;
1311
1312 /* Verify symlinks were not the cause of filename_cmp name difference above.
1313
1314 Some operating systems, e.g. Windows, do not provide a meaningful
1315 st_ino; they always set it to zero. (Windows does provide a
1316 meaningful st_dev.) Do not indicate a duplicate library in that
1317 case. While there is no guarantee that a system that provides
1318 meaningful inode numbers will never set st_ino to zero, this is
1319 merely an optimization, so we do not need to worry about false
1320 negatives. */
1321
1322 if (bfd_stat (abfd, &abfd_stat) == 0
1323 && abfd_stat.st_ino != 0
1324 && bfd_stat (parent_objfile->obfd, &parent_stat) == 0)
1325 {
1326 if (abfd_stat.st_dev == parent_stat.st_dev
1327 && abfd_stat.st_ino == parent_stat.st_ino)
1328 {
1329 gdb_bfd_unref (abfd);
1330 return 0;
1331 }
1332 verified_as_different = 1;
1333 }
1334 else
1335 verified_as_different = 0;
1336
1337 file_crc_p = gdb_bfd_crc (abfd, &file_crc);
1338
1339 gdb_bfd_unref (abfd);
1340
1341 if (!file_crc_p)
1342 return 0;
1343
1344 if (crc != file_crc)
1345 {
1346 unsigned long parent_crc;
1347
1348 /* If one (or both) the files are accessed for example the via "remote:"
1349 gdbserver way it does not support the bfd_stat operation. Verify
1350 whether those two files are not the same manually. */
1351
1352 if (!verified_as_different)
1353 {
1354 if (!gdb_bfd_crc (parent_objfile->obfd, &parent_crc))
1355 return 0;
1356 }
1357
1358 if (verified_as_different || parent_crc != file_crc)
1359 warning (_("the debug information found in \"%s\""
1360 " does not match \"%s\" (CRC mismatch).\n"),
1361 name, objfile_name (parent_objfile));
1362
1363 return 0;
1364 }
1365
1366 return 1;
1367 }
1368
1369 char *debug_file_directory = NULL;
1370 static void
1371 show_debug_file_directory (struct ui_file *file, int from_tty,
1372 struct cmd_list_element *c, const char *value)
1373 {
1374 fprintf_filtered (file,
1375 _("The directory where separate debug "
1376 "symbols are searched for is \"%s\".\n"),
1377 value);
1378 }
1379
1380 #if ! defined (DEBUG_SUBDIRECTORY)
1381 #define DEBUG_SUBDIRECTORY ".debug"
1382 #endif
1383
1384 /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
1385 where the original file resides (may not be the same as
1386 dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are
1387 looking for. CANON_DIR is the "realpath" form of DIR.
1388 DIR must contain a trailing '/'.
1389 Returns the path of the file with separate debug info, of NULL. */
1390
1391 static char *
1392 find_separate_debug_file (const char *dir,
1393 const char *canon_dir,
1394 const char *debuglink,
1395 unsigned long crc32, struct objfile *objfile)
1396 {
1397 char *debugdir;
1398 char *debugfile;
1399 int i;
1400 VEC (char_ptr) *debugdir_vec;
1401 struct cleanup *back_to;
1402 int ix;
1403
1404 /* Set I to max (strlen (canon_dir), strlen (dir)). */
1405 i = strlen (dir);
1406 if (canon_dir != NULL && strlen (canon_dir) > i)
1407 i = strlen (canon_dir);
1408
1409 debugfile = xmalloc (strlen (debug_file_directory) + 1
1410 + i
1411 + strlen (DEBUG_SUBDIRECTORY)
1412 + strlen ("/")
1413 + strlen (debuglink)
1414 + 1);
1415
1416 /* First try in the same directory as the original file. */
1417 strcpy (debugfile, dir);
1418 strcat (debugfile, debuglink);
1419
1420 if (separate_debug_file_exists (debugfile, crc32, objfile))
1421 return debugfile;
1422
1423 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1424 strcpy (debugfile, dir);
1425 strcat (debugfile, DEBUG_SUBDIRECTORY);
1426 strcat (debugfile, "/");
1427 strcat (debugfile, debuglink);
1428
1429 if (separate_debug_file_exists (debugfile, crc32, objfile))
1430 return debugfile;
1431
1432 /* Then try in the global debugfile directories.
1433
1434 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1435 cause "/..." lookups. */
1436
1437 debugdir_vec = dirnames_to_char_ptr_vec (debug_file_directory);
1438 back_to = make_cleanup_free_char_ptr_vec (debugdir_vec);
1439
1440 for (ix = 0; VEC_iterate (char_ptr, debugdir_vec, ix, debugdir); ++ix)
1441 {
1442 strcpy (debugfile, debugdir);
1443 strcat (debugfile, "/");
1444 strcat (debugfile, dir);
1445 strcat (debugfile, debuglink);
1446
1447 if (separate_debug_file_exists (debugfile, crc32, objfile))
1448 {
1449 do_cleanups (back_to);
1450 return debugfile;
1451 }
1452
1453 /* If the file is in the sysroot, try using its base path in the
1454 global debugfile directory. */
1455 if (canon_dir != NULL
1456 && filename_ncmp (canon_dir, gdb_sysroot,
1457 strlen (gdb_sysroot)) == 0
1458 && IS_DIR_SEPARATOR (canon_dir[strlen (gdb_sysroot)]))
1459 {
1460 strcpy (debugfile, debugdir);
1461 strcat (debugfile, canon_dir + strlen (gdb_sysroot));
1462 strcat (debugfile, "/");
1463 strcat (debugfile, debuglink);
1464
1465 if (separate_debug_file_exists (debugfile, crc32, objfile))
1466 {
1467 do_cleanups (back_to);
1468 return debugfile;
1469 }
1470 }
1471 }
1472
1473 do_cleanups (back_to);
1474 xfree (debugfile);
1475 return NULL;
1476 }
1477
1478 /* Modify PATH to contain only "[/]directory/" part of PATH.
1479 If there were no directory separators in PATH, PATH will be empty
1480 string on return. */
1481
1482 static void
1483 terminate_after_last_dir_separator (char *path)
1484 {
1485 int i;
1486
1487 /* Strip off the final filename part, leaving the directory name,
1488 followed by a slash. The directory can be relative or absolute. */
1489 for (i = strlen(path) - 1; i >= 0; i--)
1490 if (IS_DIR_SEPARATOR (path[i]))
1491 break;
1492
1493 /* If I is -1 then no directory is present there and DIR will be "". */
1494 path[i + 1] = '\0';
1495 }
1496
1497 /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section).
1498 Returns pathname, or NULL. */
1499
1500 char *
1501 find_separate_debug_file_by_debuglink (struct objfile *objfile)
1502 {
1503 char *debuglink;
1504 char *dir, *canon_dir;
1505 char *debugfile;
1506 unsigned long crc32;
1507 struct cleanup *cleanups;
1508
1509 debuglink = bfd_get_debug_link_info (objfile->obfd, &crc32);
1510
1511 if (debuglink == NULL)
1512 {
1513 /* There's no separate debug info, hence there's no way we could
1514 load it => no warning. */
1515 return NULL;
1516 }
1517
1518 cleanups = make_cleanup (xfree, debuglink);
1519 dir = xstrdup (objfile_name (objfile));
1520 make_cleanup (xfree, dir);
1521 terminate_after_last_dir_separator (dir);
1522 canon_dir = lrealpath (dir);
1523
1524 debugfile = find_separate_debug_file (dir, canon_dir, debuglink,
1525 crc32, objfile);
1526 xfree (canon_dir);
1527
1528 if (debugfile == NULL)
1529 {
1530 #ifdef HAVE_LSTAT
1531 /* For PR gdb/9538, try again with realpath (if different from the
1532 original). */
1533
1534 struct stat st_buf;
1535
1536 if (lstat (objfile_name (objfile), &st_buf) == 0
1537 && S_ISLNK (st_buf.st_mode))
1538 {
1539 char *symlink_dir;
1540
1541 symlink_dir = lrealpath (objfile_name (objfile));
1542 if (symlink_dir != NULL)
1543 {
1544 make_cleanup (xfree, symlink_dir);
1545 terminate_after_last_dir_separator (symlink_dir);
1546 if (strcmp (dir, symlink_dir) != 0)
1547 {
1548 /* Different directory, so try using it. */
1549 debugfile = find_separate_debug_file (symlink_dir,
1550 symlink_dir,
1551 debuglink,
1552 crc32,
1553 objfile);
1554 }
1555 }
1556 }
1557 #endif /* HAVE_LSTAT */
1558 }
1559
1560 do_cleanups (cleanups);
1561 return debugfile;
1562 }
1563
1564 /* This is the symbol-file command. Read the file, analyze its
1565 symbols, and add a struct symtab to a symtab list. The syntax of
1566 the command is rather bizarre:
1567
1568 1. The function buildargv implements various quoting conventions
1569 which are undocumented and have little or nothing in common with
1570 the way things are quoted (or not quoted) elsewhere in GDB.
1571
1572 2. Options are used, which are not generally used in GDB (perhaps
1573 "set mapped on", "set readnow on" would be better)
1574
1575 3. The order of options matters, which is contrary to GNU
1576 conventions (because it is confusing and inconvenient). */
1577
1578 void
1579 symbol_file_command (char *args, int from_tty)
1580 {
1581 dont_repeat ();
1582
1583 if (args == NULL)
1584 {
1585 symbol_file_clear (from_tty);
1586 }
1587 else
1588 {
1589 char **argv = gdb_buildargv (args);
1590 int flags = OBJF_USERLOADED;
1591 struct cleanup *cleanups;
1592 char *name = NULL;
1593
1594 cleanups = make_cleanup_freeargv (argv);
1595 while (*argv != NULL)
1596 {
1597 if (strcmp (*argv, "-readnow") == 0)
1598 flags |= OBJF_READNOW;
1599 else if (**argv == '-')
1600 error (_("unknown option `%s'"), *argv);
1601 else
1602 {
1603 symbol_file_add_main_1 (*argv, from_tty, flags);
1604 name = *argv;
1605 }
1606
1607 argv++;
1608 }
1609
1610 if (name == NULL)
1611 error (_("no symbol file name was specified"));
1612
1613 do_cleanups (cleanups);
1614 }
1615 }
1616
1617 /* Set the initial language.
1618
1619 FIXME: A better solution would be to record the language in the
1620 psymtab when reading partial symbols, and then use it (if known) to
1621 set the language. This would be a win for formats that encode the
1622 language in an easily discoverable place, such as DWARF. For
1623 stabs, we can jump through hoops looking for specially named
1624 symbols or try to intuit the language from the specific type of
1625 stabs we find, but we can't do that until later when we read in
1626 full symbols. */
1627
1628 void
1629 set_initial_language (void)
1630 {
1631 enum language lang = language_unknown;
1632
1633 if (language_of_main != language_unknown)
1634 lang = language_of_main;
1635 else
1636 {
1637 char *name = main_name ();
1638 struct symbol *sym = lookup_symbol (name, NULL, VAR_DOMAIN, NULL);
1639
1640 if (sym != NULL)
1641 lang = SYMBOL_LANGUAGE (sym);
1642 }
1643
1644 if (lang == language_unknown)
1645 {
1646 /* Make C the default language */
1647 lang = language_c;
1648 }
1649
1650 set_language (lang);
1651 expected_language = current_language; /* Don't warn the user. */
1652 }
1653
1654 /* If NAME is a remote name open the file using remote protocol, otherwise
1655 open it normally. Returns a new reference to the BFD. On error,
1656 returns NULL with the BFD error set. */
1657
1658 bfd *
1659 gdb_bfd_open_maybe_remote (const char *name)
1660 {
1661 bfd *result;
1662
1663 if (remote_filename_p (name))
1664 result = remote_bfd_open (name, gnutarget);
1665 else
1666 result = gdb_bfd_open (name, gnutarget, -1);
1667
1668 return result;
1669 }
1670
1671 /* Open the file specified by NAME and hand it off to BFD for
1672 preliminary analysis. Return a newly initialized bfd *, which
1673 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1674 absolute). In case of trouble, error() is called. */
1675
1676 bfd *
1677 symfile_bfd_open (const char *cname)
1678 {
1679 bfd *sym_bfd;
1680 int desc;
1681 char *name, *absolute_name;
1682 struct cleanup *back_to;
1683
1684 if (remote_filename_p (cname))
1685 {
1686 sym_bfd = remote_bfd_open (cname, gnutarget);
1687 if (!sym_bfd)
1688 error (_("`%s': can't open to read symbols: %s."), cname,
1689 bfd_errmsg (bfd_get_error ()));
1690
1691 if (!bfd_check_format (sym_bfd, bfd_object))
1692 {
1693 make_cleanup_bfd_unref (sym_bfd);
1694 error (_("`%s': can't read symbols: %s."), cname,
1695 bfd_errmsg (bfd_get_error ()));
1696 }
1697
1698 return sym_bfd;
1699 }
1700
1701 name = tilde_expand (cname); /* Returns 1st new malloc'd copy. */
1702
1703 /* Look down path for it, allocate 2nd new malloc'd copy. */
1704 desc = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH, name,
1705 O_RDONLY | O_BINARY, &absolute_name);
1706 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1707 if (desc < 0)
1708 {
1709 char *exename = alloca (strlen (name) + 5);
1710
1711 strcat (strcpy (exename, name), ".exe");
1712 desc = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH,
1713 exename, O_RDONLY | O_BINARY, &absolute_name);
1714 }
1715 #endif
1716 if (desc < 0)
1717 {
1718 make_cleanup (xfree, name);
1719 perror_with_name (name);
1720 }
1721
1722 xfree (name);
1723 name = absolute_name;
1724 back_to = make_cleanup (xfree, name);
1725
1726 sym_bfd = gdb_bfd_open (name, gnutarget, desc);
1727 if (!sym_bfd)
1728 error (_("`%s': can't open to read symbols: %s."), name,
1729 bfd_errmsg (bfd_get_error ()));
1730 bfd_set_cacheable (sym_bfd, 1);
1731
1732 if (!bfd_check_format (sym_bfd, bfd_object))
1733 {
1734 make_cleanup_bfd_unref (sym_bfd);
1735 error (_("`%s': can't read symbols: %s."), name,
1736 bfd_errmsg (bfd_get_error ()));
1737 }
1738
1739 do_cleanups (back_to);
1740
1741 return sym_bfd;
1742 }
1743
1744 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1745 the section was not found. */
1746
1747 int
1748 get_section_index (struct objfile *objfile, char *section_name)
1749 {
1750 asection *sect = bfd_get_section_by_name (objfile->obfd, section_name);
1751
1752 if (sect)
1753 return sect->index;
1754 else
1755 return -1;
1756 }
1757
1758 /* Link SF into the global symtab_fns list.
1759 FLAVOUR is the file format that SF handles.
1760 Called on startup by the _initialize routine in each object file format
1761 reader, to register information about each format the reader is prepared
1762 to handle. */
1763
1764 void
1765 add_symtab_fns (enum bfd_flavour flavour, const struct sym_fns *sf)
1766 {
1767 registered_sym_fns fns = { flavour, sf };
1768
1769 VEC_safe_push (registered_sym_fns, symtab_fns, &fns);
1770 }
1771
1772 /* Initialize OBJFILE to read symbols from its associated BFD. It
1773 either returns or calls error(). The result is an initialized
1774 struct sym_fns in the objfile structure, that contains cached
1775 information about the symbol file. */
1776
1777 static const struct sym_fns *
1778 find_sym_fns (bfd *abfd)
1779 {
1780 registered_sym_fns *rsf;
1781 enum bfd_flavour our_flavour = bfd_get_flavour (abfd);
1782 int i;
1783
1784 if (our_flavour == bfd_target_srec_flavour
1785 || our_flavour == bfd_target_ihex_flavour
1786 || our_flavour == bfd_target_tekhex_flavour)
1787 return NULL; /* No symbols. */
1788
1789 for (i = 0; VEC_iterate (registered_sym_fns, symtab_fns, i, rsf); ++i)
1790 if (our_flavour == rsf->sym_flavour)
1791 return rsf->sym_fns;
1792
1793 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1794 bfd_get_target (abfd));
1795 }
1796 \f
1797
1798 /* This function runs the load command of our current target. */
1799
1800 static void
1801 load_command (char *arg, int from_tty)
1802 {
1803 struct cleanup *cleanup = make_cleanup (null_cleanup, NULL);
1804
1805 dont_repeat ();
1806
1807 /* The user might be reloading because the binary has changed. Take
1808 this opportunity to check. */
1809 reopen_exec_file ();
1810 reread_symbols ();
1811
1812 if (arg == NULL)
1813 {
1814 char *parg;
1815 int count = 0;
1816
1817 parg = arg = get_exec_file (1);
1818
1819 /* Count how many \ " ' tab space there are in the name. */
1820 while ((parg = strpbrk (parg, "\\\"'\t ")))
1821 {
1822 parg++;
1823 count++;
1824 }
1825
1826 if (count)
1827 {
1828 /* We need to quote this string so buildargv can pull it apart. */
1829 char *temp = xmalloc (strlen (arg) + count + 1 );
1830 char *ptemp = temp;
1831 char *prev;
1832
1833 make_cleanup (xfree, temp);
1834
1835 prev = parg = arg;
1836 while ((parg = strpbrk (parg, "\\\"'\t ")))
1837 {
1838 strncpy (ptemp, prev, parg - prev);
1839 ptemp += parg - prev;
1840 prev = parg++;
1841 *ptemp++ = '\\';
1842 }
1843 strcpy (ptemp, prev);
1844
1845 arg = temp;
1846 }
1847 }
1848
1849 target_load (arg, from_tty);
1850
1851 /* After re-loading the executable, we don't really know which
1852 overlays are mapped any more. */
1853 overlay_cache_invalid = 1;
1854
1855 do_cleanups (cleanup);
1856 }
1857
1858 /* This version of "load" should be usable for any target. Currently
1859 it is just used for remote targets, not inftarg.c or core files,
1860 on the theory that only in that case is it useful.
1861
1862 Avoiding xmodem and the like seems like a win (a) because we don't have
1863 to worry about finding it, and (b) On VMS, fork() is very slow and so
1864 we don't want to run a subprocess. On the other hand, I'm not sure how
1865 performance compares. */
1866
1867 static int validate_download = 0;
1868
1869 /* Callback service function for generic_load (bfd_map_over_sections). */
1870
1871 static void
1872 add_section_size_callback (bfd *abfd, asection *asec, void *data)
1873 {
1874 bfd_size_type *sum = data;
1875
1876 *sum += bfd_get_section_size (asec);
1877 }
1878
1879 /* Opaque data for load_section_callback. */
1880 struct load_section_data {
1881 CORE_ADDR load_offset;
1882 struct load_progress_data *progress_data;
1883 VEC(memory_write_request_s) *requests;
1884 };
1885
1886 /* Opaque data for load_progress. */
1887 struct load_progress_data {
1888 /* Cumulative data. */
1889 unsigned long write_count;
1890 unsigned long data_count;
1891 bfd_size_type total_size;
1892 };
1893
1894 /* Opaque data for load_progress for a single section. */
1895 struct load_progress_section_data {
1896 struct load_progress_data *cumulative;
1897
1898 /* Per-section data. */
1899 const char *section_name;
1900 ULONGEST section_sent;
1901 ULONGEST section_size;
1902 CORE_ADDR lma;
1903 gdb_byte *buffer;
1904 };
1905
1906 /* Target write callback routine for progress reporting. */
1907
1908 static void
1909 load_progress (ULONGEST bytes, void *untyped_arg)
1910 {
1911 struct load_progress_section_data *args = untyped_arg;
1912 struct load_progress_data *totals;
1913
1914 if (args == NULL)
1915 /* Writing padding data. No easy way to get at the cumulative
1916 stats, so just ignore this. */
1917 return;
1918
1919 totals = args->cumulative;
1920
1921 if (bytes == 0 && args->section_sent == 0)
1922 {
1923 /* The write is just starting. Let the user know we've started
1924 this section. */
1925 ui_out_message (current_uiout, 0, "Loading section %s, size %s lma %s\n",
1926 args->section_name, hex_string (args->section_size),
1927 paddress (target_gdbarch (), args->lma));
1928 return;
1929 }
1930
1931 if (validate_download)
1932 {
1933 /* Broken memories and broken monitors manifest themselves here
1934 when bring new computers to life. This doubles already slow
1935 downloads. */
1936 /* NOTE: cagney/1999-10-18: A more efficient implementation
1937 might add a verify_memory() method to the target vector and
1938 then use that. remote.c could implement that method using
1939 the ``qCRC'' packet. */
1940 gdb_byte *check = xmalloc (bytes);
1941 struct cleanup *verify_cleanups = make_cleanup (xfree, check);
1942
1943 if (target_read_memory (args->lma, check, bytes) != 0)
1944 error (_("Download verify read failed at %s"),
1945 paddress (target_gdbarch (), args->lma));
1946 if (memcmp (args->buffer, check, bytes) != 0)
1947 error (_("Download verify compare failed at %s"),
1948 paddress (target_gdbarch (), args->lma));
1949 do_cleanups (verify_cleanups);
1950 }
1951 totals->data_count += bytes;
1952 args->lma += bytes;
1953 args->buffer += bytes;
1954 totals->write_count += 1;
1955 args->section_sent += bytes;
1956 if (check_quit_flag ()
1957 || (deprecated_ui_load_progress_hook != NULL
1958 && deprecated_ui_load_progress_hook (args->section_name,
1959 args->section_sent)))
1960 error (_("Canceled the download"));
1961
1962 if (deprecated_show_load_progress != NULL)
1963 deprecated_show_load_progress (args->section_name,
1964 args->section_sent,
1965 args->section_size,
1966 totals->data_count,
1967 totals->total_size);
1968 }
1969
1970 /* Callback service function for generic_load (bfd_map_over_sections). */
1971
1972 static void
1973 load_section_callback (bfd *abfd, asection *asec, void *data)
1974 {
1975 struct memory_write_request *new_request;
1976 struct load_section_data *args = data;
1977 struct load_progress_section_data *section_data;
1978 bfd_size_type size = bfd_get_section_size (asec);
1979 gdb_byte *buffer;
1980 const char *sect_name = bfd_get_section_name (abfd, asec);
1981
1982 if ((bfd_get_section_flags (abfd, asec) & SEC_LOAD) == 0)
1983 return;
1984
1985 if (size == 0)
1986 return;
1987
1988 new_request = VEC_safe_push (memory_write_request_s,
1989 args->requests, NULL);
1990 memset (new_request, 0, sizeof (struct memory_write_request));
1991 section_data = xcalloc (1, sizeof (struct load_progress_section_data));
1992 new_request->begin = bfd_section_lma (abfd, asec) + args->load_offset;
1993 new_request->end = new_request->begin + size; /* FIXME Should size
1994 be in instead? */
1995 new_request->data = xmalloc (size);
1996 new_request->baton = section_data;
1997
1998 buffer = new_request->data;
1999
2000 section_data->cumulative = args->progress_data;
2001 section_data->section_name = sect_name;
2002 section_data->section_size = size;
2003 section_data->lma = new_request->begin;
2004 section_data->buffer = buffer;
2005
2006 bfd_get_section_contents (abfd, asec, buffer, 0, size);
2007 }
2008
2009 /* Clean up an entire memory request vector, including load
2010 data and progress records. */
2011
2012 static void
2013 clear_memory_write_data (void *arg)
2014 {
2015 VEC(memory_write_request_s) **vec_p = arg;
2016 VEC(memory_write_request_s) *vec = *vec_p;
2017 int i;
2018 struct memory_write_request *mr;
2019
2020 for (i = 0; VEC_iterate (memory_write_request_s, vec, i, mr); ++i)
2021 {
2022 xfree (mr->data);
2023 xfree (mr->baton);
2024 }
2025 VEC_free (memory_write_request_s, vec);
2026 }
2027
2028 void
2029 generic_load (char *args, int from_tty)
2030 {
2031 bfd *loadfile_bfd;
2032 struct timeval start_time, end_time;
2033 char *filename;
2034 struct cleanup *old_cleanups = make_cleanup (null_cleanup, 0);
2035 struct load_section_data cbdata;
2036 struct load_progress_data total_progress;
2037 struct ui_out *uiout = current_uiout;
2038
2039 CORE_ADDR entry;
2040 char **argv;
2041
2042 memset (&cbdata, 0, sizeof (cbdata));
2043 memset (&total_progress, 0, sizeof (total_progress));
2044 cbdata.progress_data = &total_progress;
2045
2046 make_cleanup (clear_memory_write_data, &cbdata.requests);
2047
2048 if (args == NULL)
2049 error_no_arg (_("file to load"));
2050
2051 argv = gdb_buildargv (args);
2052 make_cleanup_freeargv (argv);
2053
2054 filename = tilde_expand (argv[0]);
2055 make_cleanup (xfree, filename);
2056
2057 if (argv[1] != NULL)
2058 {
2059 const char *endptr;
2060
2061 cbdata.load_offset = strtoulst (argv[1], &endptr, 0);
2062
2063 /* If the last word was not a valid number then
2064 treat it as a file name with spaces in. */
2065 if (argv[1] == endptr)
2066 error (_("Invalid download offset:%s."), argv[1]);
2067
2068 if (argv[2] != NULL)
2069 error (_("Too many parameters."));
2070 }
2071
2072 /* Open the file for loading. */
2073 loadfile_bfd = gdb_bfd_open (filename, gnutarget, -1);
2074 if (loadfile_bfd == NULL)
2075 {
2076 perror_with_name (filename);
2077 return;
2078 }
2079
2080 make_cleanup_bfd_unref (loadfile_bfd);
2081
2082 if (!bfd_check_format (loadfile_bfd, bfd_object))
2083 {
2084 error (_("\"%s\" is not an object file: %s"), filename,
2085 bfd_errmsg (bfd_get_error ()));
2086 }
2087
2088 bfd_map_over_sections (loadfile_bfd, add_section_size_callback,
2089 (void *) &total_progress.total_size);
2090
2091 bfd_map_over_sections (loadfile_bfd, load_section_callback, &cbdata);
2092
2093 gettimeofday (&start_time, NULL);
2094
2095 if (target_write_memory_blocks (cbdata.requests, flash_discard,
2096 load_progress) != 0)
2097 error (_("Load failed"));
2098
2099 gettimeofday (&end_time, NULL);
2100
2101 entry = bfd_get_start_address (loadfile_bfd);
2102 entry = gdbarch_addr_bits_remove (target_gdbarch (), entry);
2103 ui_out_text (uiout, "Start address ");
2104 ui_out_field_fmt (uiout, "address", "%s", paddress (target_gdbarch (), entry));
2105 ui_out_text (uiout, ", load size ");
2106 ui_out_field_fmt (uiout, "load-size", "%lu", total_progress.data_count);
2107 ui_out_text (uiout, "\n");
2108 /* We were doing this in remote-mips.c, I suspect it is right
2109 for other targets too. */
2110 regcache_write_pc (get_current_regcache (), entry);
2111
2112 /* Reset breakpoints, now that we have changed the load image. For
2113 instance, breakpoints may have been set (or reset, by
2114 post_create_inferior) while connected to the target but before we
2115 loaded the program. In that case, the prologue analyzer could
2116 have read instructions from the target to find the right
2117 breakpoint locations. Loading has changed the contents of that
2118 memory. */
2119
2120 breakpoint_re_set ();
2121
2122 /* FIXME: are we supposed to call symbol_file_add or not? According
2123 to a comment from remote-mips.c (where a call to symbol_file_add
2124 was commented out), making the call confuses GDB if more than one
2125 file is loaded in. Some targets do (e.g., remote-vx.c) but
2126 others don't (or didn't - perhaps they have all been deleted). */
2127
2128 print_transfer_performance (gdb_stdout, total_progress.data_count,
2129 total_progress.write_count,
2130 &start_time, &end_time);
2131
2132 do_cleanups (old_cleanups);
2133 }
2134
2135 /* Report how fast the transfer went. */
2136
2137 void
2138 print_transfer_performance (struct ui_file *stream,
2139 unsigned long data_count,
2140 unsigned long write_count,
2141 const struct timeval *start_time,
2142 const struct timeval *end_time)
2143 {
2144 ULONGEST time_count;
2145 struct ui_out *uiout = current_uiout;
2146
2147 /* Compute the elapsed time in milliseconds, as a tradeoff between
2148 accuracy and overflow. */
2149 time_count = (end_time->tv_sec - start_time->tv_sec) * 1000;
2150 time_count += (end_time->tv_usec - start_time->tv_usec) / 1000;
2151
2152 ui_out_text (uiout, "Transfer rate: ");
2153 if (time_count > 0)
2154 {
2155 unsigned long rate = ((ULONGEST) data_count * 1000) / time_count;
2156
2157 if (ui_out_is_mi_like_p (uiout))
2158 {
2159 ui_out_field_fmt (uiout, "transfer-rate", "%lu", rate * 8);
2160 ui_out_text (uiout, " bits/sec");
2161 }
2162 else if (rate < 1024)
2163 {
2164 ui_out_field_fmt (uiout, "transfer-rate", "%lu", rate);
2165 ui_out_text (uiout, " bytes/sec");
2166 }
2167 else
2168 {
2169 ui_out_field_fmt (uiout, "transfer-rate", "%lu", rate / 1024);
2170 ui_out_text (uiout, " KB/sec");
2171 }
2172 }
2173 else
2174 {
2175 ui_out_field_fmt (uiout, "transferred-bits", "%lu", (data_count * 8));
2176 ui_out_text (uiout, " bits in <1 sec");
2177 }
2178 if (write_count > 0)
2179 {
2180 ui_out_text (uiout, ", ");
2181 ui_out_field_fmt (uiout, "write-rate", "%lu", data_count / write_count);
2182 ui_out_text (uiout, " bytes/write");
2183 }
2184 ui_out_text (uiout, ".\n");
2185 }
2186
2187 /* This function allows the addition of incrementally linked object files.
2188 It does not modify any state in the target, only in the debugger. */
2189 /* Note: ezannoni 2000-04-13 This function/command used to have a
2190 special case syntax for the rombug target (Rombug is the boot
2191 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2192 rombug case, the user doesn't need to supply a text address,
2193 instead a call to target_link() (in target.c) would supply the
2194 value to use. We are now discontinuing this type of ad hoc syntax. */
2195
2196 static void
2197 add_symbol_file_command (char *args, int from_tty)
2198 {
2199 struct gdbarch *gdbarch = get_current_arch ();
2200 char *filename = NULL;
2201 int flags = OBJF_USERLOADED;
2202 char *arg;
2203 int section_index = 0;
2204 int argcnt = 0;
2205 int sec_num = 0;
2206 int i;
2207 int expecting_sec_name = 0;
2208 int expecting_sec_addr = 0;
2209 char **argv;
2210 struct objfile *objf;
2211
2212 struct sect_opt
2213 {
2214 char *name;
2215 char *value;
2216 };
2217
2218 struct section_addr_info *section_addrs;
2219 struct sect_opt *sect_opts = NULL;
2220 size_t num_sect_opts = 0;
2221 struct cleanup *my_cleanups = make_cleanup (null_cleanup, NULL);
2222
2223 num_sect_opts = 16;
2224 sect_opts = (struct sect_opt *) xmalloc (num_sect_opts
2225 * sizeof (struct sect_opt));
2226
2227 dont_repeat ();
2228
2229 if (args == NULL)
2230 error (_("add-symbol-file takes a file name and an address"));
2231
2232 argv = gdb_buildargv (args);
2233 make_cleanup_freeargv (argv);
2234
2235 for (arg = argv[0], argcnt = 0; arg != NULL; arg = argv[++argcnt])
2236 {
2237 /* Process the argument. */
2238 if (argcnt == 0)
2239 {
2240 /* The first argument is the file name. */
2241 filename = tilde_expand (arg);
2242 make_cleanup (xfree, filename);
2243 }
2244 else if (argcnt == 1)
2245 {
2246 /* The second argument is always the text address at which
2247 to load the program. */
2248 sect_opts[section_index].name = ".text";
2249 sect_opts[section_index].value = arg;
2250 if (++section_index >= num_sect_opts)
2251 {
2252 num_sect_opts *= 2;
2253 sect_opts = ((struct sect_opt *)
2254 xrealloc (sect_opts,
2255 num_sect_opts
2256 * sizeof (struct sect_opt)));
2257 }
2258 }
2259 else
2260 {
2261 /* It's an option (starting with '-') or it's an argument
2262 to an option. */
2263 if (expecting_sec_name)
2264 {
2265 sect_opts[section_index].name = arg;
2266 expecting_sec_name = 0;
2267 }
2268 else if (expecting_sec_addr)
2269 {
2270 sect_opts[section_index].value = arg;
2271 expecting_sec_addr = 0;
2272 if (++section_index >= num_sect_opts)
2273 {
2274 num_sect_opts *= 2;
2275 sect_opts = ((struct sect_opt *)
2276 xrealloc (sect_opts,
2277 num_sect_opts
2278 * sizeof (struct sect_opt)));
2279 }
2280 }
2281 else if (strcmp (arg, "-readnow") == 0)
2282 flags |= OBJF_READNOW;
2283 else if (strcmp (arg, "-s") == 0)
2284 {
2285 expecting_sec_name = 1;
2286 expecting_sec_addr = 1;
2287 }
2288 else
2289 error (_("USAGE: add-symbol-file <filename> <textaddress>"
2290 " [-readnow] [-s <secname> <addr>]*"));
2291 }
2292 }
2293
2294 /* This command takes at least two arguments. The first one is a
2295 filename, and the second is the address where this file has been
2296 loaded. Abort now if this address hasn't been provided by the
2297 user. */
2298 if (section_index < 1)
2299 error (_("The address where %s has been loaded is missing"), filename);
2300
2301 /* Print the prompt for the query below. And save the arguments into
2302 a sect_addr_info structure to be passed around to other
2303 functions. We have to split this up into separate print
2304 statements because hex_string returns a local static
2305 string. */
2306
2307 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename);
2308 section_addrs = alloc_section_addr_info (section_index);
2309 make_cleanup (xfree, section_addrs);
2310 for (i = 0; i < section_index; i++)
2311 {
2312 CORE_ADDR addr;
2313 char *val = sect_opts[i].value;
2314 char *sec = sect_opts[i].name;
2315
2316 addr = parse_and_eval_address (val);
2317
2318 /* Here we store the section offsets in the order they were
2319 entered on the command line. */
2320 section_addrs->other[sec_num].name = sec;
2321 section_addrs->other[sec_num].addr = addr;
2322 printf_unfiltered ("\t%s_addr = %s\n", sec,
2323 paddress (gdbarch, addr));
2324 sec_num++;
2325
2326 /* The object's sections are initialized when a
2327 call is made to build_objfile_section_table (objfile).
2328 This happens in reread_symbols.
2329 At this point, we don't know what file type this is,
2330 so we can't determine what section names are valid. */
2331 }
2332 section_addrs->num_sections = sec_num;
2333
2334 if (from_tty && (!query ("%s", "")))
2335 error (_("Not confirmed."));
2336
2337 objf = symbol_file_add (filename, from_tty ? SYMFILE_VERBOSE : 0,
2338 section_addrs, flags);
2339
2340 add_target_sections_of_objfile (objf);
2341
2342 /* Getting new symbols may change our opinion about what is
2343 frameless. */
2344 reinit_frame_cache ();
2345 do_cleanups (my_cleanups);
2346 }
2347 \f
2348
2349 /* This function removes a symbol file that was added via add-symbol-file. */
2350
2351 static void
2352 remove_symbol_file_command (char *args, int from_tty)
2353 {
2354 char **argv;
2355 struct objfile *objf = NULL;
2356 struct cleanup *my_cleanups;
2357 struct program_space *pspace = current_program_space;
2358 struct gdbarch *gdbarch = get_current_arch ();
2359
2360 dont_repeat ();
2361
2362 if (args == NULL)
2363 error (_("remove-symbol-file: no symbol file provided"));
2364
2365 my_cleanups = make_cleanup (null_cleanup, NULL);
2366
2367 argv = gdb_buildargv (args);
2368
2369 if (strcmp (argv[0], "-a") == 0)
2370 {
2371 /* Interpret the next argument as an address. */
2372 CORE_ADDR addr;
2373
2374 if (argv[1] == NULL)
2375 error (_("Missing address argument"));
2376
2377 if (argv[2] != NULL)
2378 error (_("Junk after %s"), argv[1]);
2379
2380 addr = parse_and_eval_address (argv[1]);
2381
2382 ALL_OBJFILES (objf)
2383 {
2384 if (objf != 0
2385 && objf->flags & OBJF_USERLOADED
2386 && objf->pspace == pspace && is_addr_in_objfile (addr, objf))
2387 break;
2388 }
2389 }
2390 else if (argv[0] != NULL)
2391 {
2392 /* Interpret the current argument as a file name. */
2393 char *filename;
2394
2395 if (argv[1] != NULL)
2396 error (_("Junk after %s"), argv[0]);
2397
2398 filename = tilde_expand (argv[0]);
2399 make_cleanup (xfree, filename);
2400
2401 ALL_OBJFILES (objf)
2402 {
2403 if (objf != 0
2404 && objf->flags & OBJF_USERLOADED
2405 && objf->pspace == pspace
2406 && filename_cmp (filename, objfile_name (objf)) == 0)
2407 break;
2408 }
2409 }
2410
2411 if (objf == NULL)
2412 error (_("No symbol file found"));
2413
2414 if (from_tty
2415 && !query (_("Remove symbol table from file \"%s\"? "),
2416 objfile_name (objf)))
2417 error (_("Not confirmed."));
2418
2419 free_objfile (objf);
2420 clear_symtab_users (0);
2421
2422 do_cleanups (my_cleanups);
2423 }
2424
2425 typedef struct objfile *objfilep;
2426
2427 DEF_VEC_P (objfilep);
2428
2429 /* Re-read symbols if a symbol-file has changed. */
2430
2431 void
2432 reread_symbols (void)
2433 {
2434 struct objfile *objfile;
2435 long new_modtime;
2436 struct stat new_statbuf;
2437 int res;
2438 VEC (objfilep) *new_objfiles = NULL;
2439 struct cleanup *all_cleanups;
2440
2441 all_cleanups = make_cleanup (VEC_cleanup (objfilep), &new_objfiles);
2442
2443 /* With the addition of shared libraries, this should be modified,
2444 the load time should be saved in the partial symbol tables, since
2445 different tables may come from different source files. FIXME.
2446 This routine should then walk down each partial symbol table
2447 and see if the symbol table that it originates from has been changed. */
2448
2449 for (objfile = object_files; objfile; objfile = objfile->next)
2450 {
2451 if (objfile->obfd == NULL)
2452 continue;
2453
2454 /* Separate debug objfiles are handled in the main objfile. */
2455 if (objfile->separate_debug_objfile_backlink)
2456 continue;
2457
2458 /* If this object is from an archive (what you usually create with
2459 `ar', often called a `static library' on most systems, though
2460 a `shared library' on AIX is also an archive), then you should
2461 stat on the archive name, not member name. */
2462 if (objfile->obfd->my_archive)
2463 res = stat (objfile->obfd->my_archive->filename, &new_statbuf);
2464 else
2465 res = stat (objfile_name (objfile), &new_statbuf);
2466 if (res != 0)
2467 {
2468 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2469 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2470 objfile_name (objfile));
2471 continue;
2472 }
2473 new_modtime = new_statbuf.st_mtime;
2474 if (new_modtime != objfile->mtime)
2475 {
2476 struct cleanup *old_cleanups;
2477 struct section_offsets *offsets;
2478 int num_offsets;
2479 char *original_name;
2480
2481 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2482 objfile_name (objfile));
2483
2484 /* There are various functions like symbol_file_add,
2485 symfile_bfd_open, syms_from_objfile, etc., which might
2486 appear to do what we want. But they have various other
2487 effects which we *don't* want. So we just do stuff
2488 ourselves. We don't worry about mapped files (for one thing,
2489 any mapped file will be out of date). */
2490
2491 /* If we get an error, blow away this objfile (not sure if
2492 that is the correct response for things like shared
2493 libraries). */
2494 old_cleanups = make_cleanup_free_objfile (objfile);
2495 /* We need to do this whenever any symbols go away. */
2496 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
2497
2498 if (exec_bfd != NULL
2499 && filename_cmp (bfd_get_filename (objfile->obfd),
2500 bfd_get_filename (exec_bfd)) == 0)
2501 {
2502 /* Reload EXEC_BFD without asking anything. */
2503
2504 exec_file_attach (bfd_get_filename (objfile->obfd), 0);
2505 }
2506
2507 /* Keep the calls order approx. the same as in free_objfile. */
2508
2509 /* Free the separate debug objfiles. It will be
2510 automatically recreated by sym_read. */
2511 free_objfile_separate_debug (objfile);
2512
2513 /* Remove any references to this objfile in the global
2514 value lists. */
2515 preserve_values (objfile);
2516
2517 /* Nuke all the state that we will re-read. Much of the following
2518 code which sets things to NULL really is necessary to tell
2519 other parts of GDB that there is nothing currently there.
2520
2521 Try to keep the freeing order compatible with free_objfile. */
2522
2523 if (objfile->sf != NULL)
2524 {
2525 (*objfile->sf->sym_finish) (objfile);
2526 }
2527
2528 clear_objfile_data (objfile);
2529
2530 /* Clean up any state BFD has sitting around. */
2531 {
2532 struct bfd *obfd = objfile->obfd;
2533 char *obfd_filename;
2534
2535 obfd_filename = bfd_get_filename (objfile->obfd);
2536 /* Open the new BFD before freeing the old one, so that
2537 the filename remains live. */
2538 objfile->obfd = gdb_bfd_open_maybe_remote (obfd_filename);
2539 if (objfile->obfd == NULL)
2540 {
2541 /* We have to make a cleanup and error here, rather
2542 than erroring later, because once we unref OBFD,
2543 OBFD_FILENAME will be freed. */
2544 make_cleanup_bfd_unref (obfd);
2545 error (_("Can't open %s to read symbols."), obfd_filename);
2546 }
2547 gdb_bfd_unref (obfd);
2548 }
2549
2550 original_name = xstrdup (objfile->original_name);
2551 make_cleanup (xfree, original_name);
2552
2553 /* bfd_openr sets cacheable to true, which is what we want. */
2554 if (!bfd_check_format (objfile->obfd, bfd_object))
2555 error (_("Can't read symbols from %s: %s."), objfile_name (objfile),
2556 bfd_errmsg (bfd_get_error ()));
2557
2558 /* Save the offsets, we will nuke them with the rest of the
2559 objfile_obstack. */
2560 num_offsets = objfile->num_sections;
2561 offsets = ((struct section_offsets *)
2562 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets)));
2563 memcpy (offsets, objfile->section_offsets,
2564 SIZEOF_N_SECTION_OFFSETS (num_offsets));
2565
2566 /* FIXME: Do we have to free a whole linked list, or is this
2567 enough? */
2568 if (objfile->global_psymbols.list)
2569 xfree (objfile->global_psymbols.list);
2570 memset (&objfile->global_psymbols, 0,
2571 sizeof (objfile->global_psymbols));
2572 if (objfile->static_psymbols.list)
2573 xfree (objfile->static_psymbols.list);
2574 memset (&objfile->static_psymbols, 0,
2575 sizeof (objfile->static_psymbols));
2576
2577 /* Free the obstacks for non-reusable objfiles. */
2578 psymbol_bcache_free (objfile->psymbol_cache);
2579 objfile->psymbol_cache = psymbol_bcache_init ();
2580 obstack_free (&objfile->objfile_obstack, 0);
2581 objfile->sections = NULL;
2582 objfile->symtabs = NULL;
2583 objfile->psymtabs = NULL;
2584 objfile->psymtabs_addrmap = NULL;
2585 objfile->free_psymtabs = NULL;
2586 objfile->template_symbols = NULL;
2587 objfile->msymbols = NULL;
2588 objfile->minimal_symbol_count = 0;
2589 memset (&objfile->msymbol_hash, 0,
2590 sizeof (objfile->msymbol_hash));
2591 memset (&objfile->msymbol_demangled_hash, 0,
2592 sizeof (objfile->msymbol_demangled_hash));
2593
2594 set_objfile_per_bfd (objfile);
2595
2596 /* obstack_init also initializes the obstack so it is
2597 empty. We could use obstack_specify_allocation but
2598 gdb_obstack.h specifies the alloc/dealloc functions. */
2599 obstack_init (&objfile->objfile_obstack);
2600
2601 objfile->original_name = obstack_copy0 (&objfile->objfile_obstack,
2602 original_name,
2603 strlen (original_name));
2604
2605 /* Reset the sym_fns pointer. The ELF reader can change it
2606 based on whether .gdb_index is present, and we need it to
2607 start over. PR symtab/15885 */
2608 objfile_set_sym_fns (objfile, find_sym_fns (objfile->obfd));
2609
2610 build_objfile_section_table (objfile);
2611 terminate_minimal_symbol_table (objfile);
2612
2613 /* We use the same section offsets as from last time. I'm not
2614 sure whether that is always correct for shared libraries. */
2615 objfile->section_offsets = (struct section_offsets *)
2616 obstack_alloc (&objfile->objfile_obstack,
2617 SIZEOF_N_SECTION_OFFSETS (num_offsets));
2618 memcpy (objfile->section_offsets, offsets,
2619 SIZEOF_N_SECTION_OFFSETS (num_offsets));
2620 objfile->num_sections = num_offsets;
2621
2622 /* What the hell is sym_new_init for, anyway? The concept of
2623 distinguishing between the main file and additional files
2624 in this way seems rather dubious. */
2625 if (objfile == symfile_objfile)
2626 {
2627 (*objfile->sf->sym_new_init) (objfile);
2628 }
2629
2630 (*objfile->sf->sym_init) (objfile);
2631 clear_complaints (&symfile_complaints, 1, 1);
2632
2633 objfile->flags &= ~OBJF_PSYMTABS_READ;
2634 read_symbols (objfile, 0);
2635
2636 if (!objfile_has_symbols (objfile))
2637 {
2638 wrap_here ("");
2639 printf_unfiltered (_("(no debugging symbols found)\n"));
2640 wrap_here ("");
2641 }
2642
2643 /* We're done reading the symbol file; finish off complaints. */
2644 clear_complaints (&symfile_complaints, 0, 1);
2645
2646 /* Getting new symbols may change our opinion about what is
2647 frameless. */
2648
2649 reinit_frame_cache ();
2650
2651 /* Discard cleanups as symbol reading was successful. */
2652 discard_cleanups (old_cleanups);
2653
2654 /* If the mtime has changed between the time we set new_modtime
2655 and now, we *want* this to be out of date, so don't call stat
2656 again now. */
2657 objfile->mtime = new_modtime;
2658 init_entry_point_info (objfile);
2659
2660 VEC_safe_push (objfilep, new_objfiles, objfile);
2661 }
2662 }
2663
2664 if (new_objfiles)
2665 {
2666 int ix;
2667
2668 /* Notify objfiles that we've modified objfile sections. */
2669 objfiles_changed ();
2670
2671 clear_symtab_users (0);
2672
2673 /* clear_objfile_data for each objfile was called before freeing it and
2674 observer_notify_new_objfile (NULL) has been called by
2675 clear_symtab_users above. Notify the new files now. */
2676 for (ix = 0; VEC_iterate (objfilep, new_objfiles, ix, objfile); ix++)
2677 observer_notify_new_objfile (objfile);
2678
2679 /* At least one objfile has changed, so we can consider that
2680 the executable we're debugging has changed too. */
2681 observer_notify_executable_changed ();
2682 }
2683
2684 do_cleanups (all_cleanups);
2685 }
2686 \f
2687
2688 typedef struct
2689 {
2690 char *ext;
2691 enum language lang;
2692 }
2693 filename_language;
2694
2695 static filename_language *filename_language_table;
2696 static int fl_table_size, fl_table_next;
2697
2698 static void
2699 add_filename_language (char *ext, enum language lang)
2700 {
2701 if (fl_table_next >= fl_table_size)
2702 {
2703 fl_table_size += 10;
2704 filename_language_table =
2705 xrealloc (filename_language_table,
2706 fl_table_size * sizeof (*filename_language_table));
2707 }
2708
2709 filename_language_table[fl_table_next].ext = xstrdup (ext);
2710 filename_language_table[fl_table_next].lang = lang;
2711 fl_table_next++;
2712 }
2713
2714 static char *ext_args;
2715 static void
2716 show_ext_args (struct ui_file *file, int from_tty,
2717 struct cmd_list_element *c, const char *value)
2718 {
2719 fprintf_filtered (file,
2720 _("Mapping between filename extension "
2721 "and source language is \"%s\".\n"),
2722 value);
2723 }
2724
2725 static void
2726 set_ext_lang_command (char *args, int from_tty, struct cmd_list_element *e)
2727 {
2728 int i;
2729 char *cp = ext_args;
2730 enum language lang;
2731
2732 /* First arg is filename extension, starting with '.' */
2733 if (*cp != '.')
2734 error (_("'%s': Filename extension must begin with '.'"), ext_args);
2735
2736 /* Find end of first arg. */
2737 while (*cp && !isspace (*cp))
2738 cp++;
2739
2740 if (*cp == '\0')
2741 error (_("'%s': two arguments required -- "
2742 "filename extension and language"),
2743 ext_args);
2744
2745 /* Null-terminate first arg. */
2746 *cp++ = '\0';
2747
2748 /* Find beginning of second arg, which should be a source language. */
2749 cp = skip_spaces (cp);
2750
2751 if (*cp == '\0')
2752 error (_("'%s': two arguments required -- "
2753 "filename extension and language"),
2754 ext_args);
2755
2756 /* Lookup the language from among those we know. */
2757 lang = language_enum (cp);
2758
2759 /* Now lookup the filename extension: do we already know it? */
2760 for (i = 0; i < fl_table_next; i++)
2761 if (0 == strcmp (ext_args, filename_language_table[i].ext))
2762 break;
2763
2764 if (i >= fl_table_next)
2765 {
2766 /* New file extension. */
2767 add_filename_language (ext_args, lang);
2768 }
2769 else
2770 {
2771 /* Redefining a previously known filename extension. */
2772
2773 /* if (from_tty) */
2774 /* query ("Really make files of type %s '%s'?", */
2775 /* ext_args, language_str (lang)); */
2776
2777 xfree (filename_language_table[i].ext);
2778 filename_language_table[i].ext = xstrdup (ext_args);
2779 filename_language_table[i].lang = lang;
2780 }
2781 }
2782
2783 static void
2784 info_ext_lang_command (char *args, int from_tty)
2785 {
2786 int i;
2787
2788 printf_filtered (_("Filename extensions and the languages they represent:"));
2789 printf_filtered ("\n\n");
2790 for (i = 0; i < fl_table_next; i++)
2791 printf_filtered ("\t%s\t- %s\n",
2792 filename_language_table[i].ext,
2793 language_str (filename_language_table[i].lang));
2794 }
2795
2796 static void
2797 init_filename_language_table (void)
2798 {
2799 if (fl_table_size == 0) /* Protect against repetition. */
2800 {
2801 fl_table_size = 20;
2802 fl_table_next = 0;
2803 filename_language_table =
2804 xmalloc (fl_table_size * sizeof (*filename_language_table));
2805 add_filename_language (".c", language_c);
2806 add_filename_language (".d", language_d);
2807 add_filename_language (".C", language_cplus);
2808 add_filename_language (".cc", language_cplus);
2809 add_filename_language (".cp", language_cplus);
2810 add_filename_language (".cpp", language_cplus);
2811 add_filename_language (".cxx", language_cplus);
2812 add_filename_language (".c++", language_cplus);
2813 add_filename_language (".java", language_java);
2814 add_filename_language (".class", language_java);
2815 add_filename_language (".m", language_objc);
2816 add_filename_language (".f", language_fortran);
2817 add_filename_language (".F", language_fortran);
2818 add_filename_language (".for", language_fortran);
2819 add_filename_language (".FOR", language_fortran);
2820 add_filename_language (".ftn", language_fortran);
2821 add_filename_language (".FTN", language_fortran);
2822 add_filename_language (".fpp", language_fortran);
2823 add_filename_language (".FPP", language_fortran);
2824 add_filename_language (".f90", language_fortran);
2825 add_filename_language (".F90", language_fortran);
2826 add_filename_language (".f95", language_fortran);
2827 add_filename_language (".F95", language_fortran);
2828 add_filename_language (".f03", language_fortran);
2829 add_filename_language (".F03", language_fortran);
2830 add_filename_language (".f08", language_fortran);
2831 add_filename_language (".F08", language_fortran);
2832 add_filename_language (".s", language_asm);
2833 add_filename_language (".sx", language_asm);
2834 add_filename_language (".S", language_asm);
2835 add_filename_language (".pas", language_pascal);
2836 add_filename_language (".p", language_pascal);
2837 add_filename_language (".pp", language_pascal);
2838 add_filename_language (".adb", language_ada);
2839 add_filename_language (".ads", language_ada);
2840 add_filename_language (".a", language_ada);
2841 add_filename_language (".ada", language_ada);
2842 add_filename_language (".dg", language_ada);
2843 }
2844 }
2845
2846 enum language
2847 deduce_language_from_filename (const char *filename)
2848 {
2849 int i;
2850 char *cp;
2851
2852 if (filename != NULL)
2853 if ((cp = strrchr (filename, '.')) != NULL)
2854 for (i = 0; i < fl_table_next; i++)
2855 if (strcmp (cp, filename_language_table[i].ext) == 0)
2856 return filename_language_table[i].lang;
2857
2858 return language_unknown;
2859 }
2860 \f
2861 /* allocate_symtab:
2862
2863 Allocate and partly initialize a new symbol table. Return a pointer
2864 to it. error() if no space.
2865
2866 Caller must set these fields:
2867 LINETABLE(symtab)
2868 symtab->blockvector
2869 symtab->dirname
2870 symtab->free_code
2871 symtab->free_ptr
2872 */
2873
2874 struct symtab *
2875 allocate_symtab (const char *filename, struct objfile *objfile)
2876 {
2877 struct symtab *symtab;
2878
2879 symtab = (struct symtab *)
2880 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symtab));
2881 memset (symtab, 0, sizeof (*symtab));
2882 symtab->filename = (char *) bcache (filename, strlen (filename) + 1,
2883 objfile->per_bfd->filename_cache);
2884 symtab->fullname = NULL;
2885 symtab->language = deduce_language_from_filename (filename);
2886 symtab->debugformat = "unknown";
2887
2888 /* Hook it to the objfile it comes from. */
2889
2890 symtab->objfile = objfile;
2891 symtab->next = objfile->symtabs;
2892 objfile->symtabs = symtab;
2893
2894 if (symtab_create_debug)
2895 {
2896 /* Be a bit clever with debugging messages, and don't print objfile
2897 every time, only when it changes. */
2898 static char *last_objfile_name = NULL;
2899
2900 if (last_objfile_name == NULL
2901 || strcmp (last_objfile_name, objfile_name (objfile)) != 0)
2902 {
2903 xfree (last_objfile_name);
2904 last_objfile_name = xstrdup (objfile_name (objfile));
2905 fprintf_unfiltered (gdb_stdlog,
2906 "Creating one or more symtabs for objfile %s ...\n",
2907 last_objfile_name);
2908 }
2909 fprintf_unfiltered (gdb_stdlog,
2910 "Created symtab %s for module %s.\n",
2911 host_address_to_string (symtab), filename);
2912 }
2913
2914 return (symtab);
2915 }
2916 \f
2917
2918 /* Reset all data structures in gdb which may contain references to symbol
2919 table data. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
2920
2921 void
2922 clear_symtab_users (int add_flags)
2923 {
2924 /* Someday, we should do better than this, by only blowing away
2925 the things that really need to be blown. */
2926
2927 /* Clear the "current" symtab first, because it is no longer valid.
2928 breakpoint_re_set may try to access the current symtab. */
2929 clear_current_source_symtab_and_line ();
2930
2931 clear_displays ();
2932 if ((add_flags & SYMFILE_DEFER_BP_RESET) == 0)
2933 breakpoint_re_set ();
2934 clear_last_displayed_sal ();
2935 clear_pc_function_cache ();
2936 observer_notify_new_objfile (NULL);
2937
2938 /* Clear globals which might have pointed into a removed objfile.
2939 FIXME: It's not clear which of these are supposed to persist
2940 between expressions and which ought to be reset each time. */
2941 expression_context_block = NULL;
2942 innermost_block = NULL;
2943
2944 /* Varobj may refer to old symbols, perform a cleanup. */
2945 varobj_invalidate ();
2946
2947 }
2948
2949 static void
2950 clear_symtab_users_cleanup (void *ignore)
2951 {
2952 clear_symtab_users (0);
2953 }
2954 \f
2955 /* OVERLAYS:
2956 The following code implements an abstraction for debugging overlay sections.
2957
2958 The target model is as follows:
2959 1) The gnu linker will permit multiple sections to be mapped into the
2960 same VMA, each with its own unique LMA (or load address).
2961 2) It is assumed that some runtime mechanism exists for mapping the
2962 sections, one by one, from the load address into the VMA address.
2963 3) This code provides a mechanism for gdb to keep track of which
2964 sections should be considered to be mapped from the VMA to the LMA.
2965 This information is used for symbol lookup, and memory read/write.
2966 For instance, if a section has been mapped then its contents
2967 should be read from the VMA, otherwise from the LMA.
2968
2969 Two levels of debugger support for overlays are available. One is
2970 "manual", in which the debugger relies on the user to tell it which
2971 overlays are currently mapped. This level of support is
2972 implemented entirely in the core debugger, and the information about
2973 whether a section is mapped is kept in the objfile->obj_section table.
2974
2975 The second level of support is "automatic", and is only available if
2976 the target-specific code provides functionality to read the target's
2977 overlay mapping table, and translate its contents for the debugger
2978 (by updating the mapped state information in the obj_section tables).
2979
2980 The interface is as follows:
2981 User commands:
2982 overlay map <name> -- tell gdb to consider this section mapped
2983 overlay unmap <name> -- tell gdb to consider this section unmapped
2984 overlay list -- list the sections that GDB thinks are mapped
2985 overlay read-target -- get the target's state of what's mapped
2986 overlay off/manual/auto -- set overlay debugging state
2987 Functional interface:
2988 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2989 section, return that section.
2990 find_pc_overlay(pc): find any overlay section that contains
2991 the pc, either in its VMA or its LMA
2992 section_is_mapped(sect): true if overlay is marked as mapped
2993 section_is_overlay(sect): true if section's VMA != LMA
2994 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2995 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2996 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2997 overlay_mapped_address(...): map an address from section's LMA to VMA
2998 overlay_unmapped_address(...): map an address from section's VMA to LMA
2999 symbol_overlayed_address(...): Return a "current" address for symbol:
3000 either in VMA or LMA depending on whether
3001 the symbol's section is currently mapped. */
3002
3003 /* Overlay debugging state: */
3004
3005 enum overlay_debugging_state overlay_debugging = ovly_off;
3006 int overlay_cache_invalid = 0; /* True if need to refresh mapped state. */
3007
3008 /* Function: section_is_overlay (SECTION)
3009 Returns true if SECTION has VMA not equal to LMA, ie.
3010 SECTION is loaded at an address different from where it will "run". */
3011
3012 int
3013 section_is_overlay (struct obj_section *section)
3014 {
3015 if (overlay_debugging && section)
3016 {
3017 bfd *abfd = section->objfile->obfd;
3018 asection *bfd_section = section->the_bfd_section;
3019
3020 if (bfd_section_lma (abfd, bfd_section) != 0
3021 && bfd_section_lma (abfd, bfd_section)
3022 != bfd_section_vma (abfd, bfd_section))
3023 return 1;
3024 }
3025
3026 return 0;
3027 }
3028
3029 /* Function: overlay_invalidate_all (void)
3030 Invalidate the mapped state of all overlay sections (mark it as stale). */
3031
3032 static void
3033 overlay_invalidate_all (void)
3034 {
3035 struct objfile *objfile;
3036 struct obj_section *sect;
3037
3038 ALL_OBJSECTIONS (objfile, sect)
3039 if (section_is_overlay (sect))
3040 sect->ovly_mapped = -1;
3041 }
3042
3043 /* Function: section_is_mapped (SECTION)
3044 Returns true if section is an overlay, and is currently mapped.
3045
3046 Access to the ovly_mapped flag is restricted to this function, so
3047 that we can do automatic update. If the global flag
3048 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
3049 overlay_invalidate_all. If the mapped state of the particular
3050 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
3051
3052 int
3053 section_is_mapped (struct obj_section *osect)
3054 {
3055 struct gdbarch *gdbarch;
3056
3057 if (osect == 0 || !section_is_overlay (osect))
3058 return 0;
3059
3060 switch (overlay_debugging)
3061 {
3062 default:
3063 case ovly_off:
3064 return 0; /* overlay debugging off */
3065 case ovly_auto: /* overlay debugging automatic */
3066 /* Unles there is a gdbarch_overlay_update function,
3067 there's really nothing useful to do here (can't really go auto). */
3068 gdbarch = get_objfile_arch (osect->objfile);
3069 if (gdbarch_overlay_update_p (gdbarch))
3070 {
3071 if (overlay_cache_invalid)
3072 {
3073 overlay_invalidate_all ();
3074 overlay_cache_invalid = 0;
3075 }
3076 if (osect->ovly_mapped == -1)
3077 gdbarch_overlay_update (gdbarch, osect);
3078 }
3079 /* fall thru to manual case */
3080 case ovly_on: /* overlay debugging manual */
3081 return osect->ovly_mapped == 1;
3082 }
3083 }
3084
3085 /* Function: pc_in_unmapped_range
3086 If PC falls into the lma range of SECTION, return true, else false. */
3087
3088 CORE_ADDR
3089 pc_in_unmapped_range (CORE_ADDR pc, struct obj_section *section)
3090 {
3091 if (section_is_overlay (section))
3092 {
3093 bfd *abfd = section->objfile->obfd;
3094 asection *bfd_section = section->the_bfd_section;
3095
3096 /* We assume the LMA is relocated by the same offset as the VMA. */
3097 bfd_vma size = bfd_get_section_size (bfd_section);
3098 CORE_ADDR offset = obj_section_offset (section);
3099
3100 if (bfd_get_section_lma (abfd, bfd_section) + offset <= pc
3101 && pc < bfd_get_section_lma (abfd, bfd_section) + offset + size)
3102 return 1;
3103 }
3104
3105 return 0;
3106 }
3107
3108 /* Function: pc_in_mapped_range
3109 If PC falls into the vma range of SECTION, return true, else false. */
3110
3111 CORE_ADDR
3112 pc_in_mapped_range (CORE_ADDR pc, struct obj_section *section)
3113 {
3114 if (section_is_overlay (section))
3115 {
3116 if (obj_section_addr (section) <= pc
3117 && pc < obj_section_endaddr (section))
3118 return 1;
3119 }
3120
3121 return 0;
3122 }
3123
3124 /* Return true if the mapped ranges of sections A and B overlap, false
3125 otherwise. */
3126
3127 static int
3128 sections_overlap (struct obj_section *a, struct obj_section *b)
3129 {
3130 CORE_ADDR a_start = obj_section_addr (a);
3131 CORE_ADDR a_end = obj_section_endaddr (a);
3132 CORE_ADDR b_start = obj_section_addr (b);
3133 CORE_ADDR b_end = obj_section_endaddr (b);
3134
3135 return (a_start < b_end && b_start < a_end);
3136 }
3137
3138 /* Function: overlay_unmapped_address (PC, SECTION)
3139 Returns the address corresponding to PC in the unmapped (load) range.
3140 May be the same as PC. */
3141
3142 CORE_ADDR
3143 overlay_unmapped_address (CORE_ADDR pc, struct obj_section *section)
3144 {
3145 if (section_is_overlay (section) && pc_in_mapped_range (pc, section))
3146 {
3147 bfd *abfd = section->objfile->obfd;
3148 asection *bfd_section = section->the_bfd_section;
3149
3150 return pc + bfd_section_lma (abfd, bfd_section)
3151 - bfd_section_vma (abfd, bfd_section);
3152 }
3153
3154 return pc;
3155 }
3156
3157 /* Function: overlay_mapped_address (PC, SECTION)
3158 Returns the address corresponding to PC in the mapped (runtime) range.
3159 May be the same as PC. */
3160
3161 CORE_ADDR
3162 overlay_mapped_address (CORE_ADDR pc, struct obj_section *section)
3163 {
3164 if (section_is_overlay (section) && pc_in_unmapped_range (pc, section))
3165 {
3166 bfd *abfd = section->objfile->obfd;
3167 asection *bfd_section = section->the_bfd_section;
3168
3169 return pc + bfd_section_vma (abfd, bfd_section)
3170 - bfd_section_lma (abfd, bfd_section);
3171 }
3172
3173 return pc;
3174 }
3175
3176 /* Function: symbol_overlayed_address
3177 Return one of two addresses (relative to the VMA or to the LMA),
3178 depending on whether the section is mapped or not. */
3179
3180 CORE_ADDR
3181 symbol_overlayed_address (CORE_ADDR address, struct obj_section *section)
3182 {
3183 if (overlay_debugging)
3184 {
3185 /* If the symbol has no section, just return its regular address. */
3186 if (section == 0)
3187 return address;
3188 /* If the symbol's section is not an overlay, just return its
3189 address. */
3190 if (!section_is_overlay (section))
3191 return address;
3192 /* If the symbol's section is mapped, just return its address. */
3193 if (section_is_mapped (section))
3194 return address;
3195 /*
3196 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3197 * then return its LOADED address rather than its vma address!!
3198 */
3199 return overlay_unmapped_address (address, section);
3200 }
3201 return address;
3202 }
3203
3204 /* Function: find_pc_overlay (PC)
3205 Return the best-match overlay section for PC:
3206 If PC matches a mapped overlay section's VMA, return that section.
3207 Else if PC matches an unmapped section's VMA, return that section.
3208 Else if PC matches an unmapped section's LMA, return that section. */
3209
3210 struct obj_section *
3211 find_pc_overlay (CORE_ADDR pc)
3212 {
3213 struct objfile *objfile;
3214 struct obj_section *osect, *best_match = NULL;
3215
3216 if (overlay_debugging)
3217 ALL_OBJSECTIONS (objfile, osect)
3218 if (section_is_overlay (osect))
3219 {
3220 if (pc_in_mapped_range (pc, osect))
3221 {
3222 if (section_is_mapped (osect))
3223 return osect;
3224 else
3225 best_match = osect;
3226 }
3227 else if (pc_in_unmapped_range (pc, osect))
3228 best_match = osect;
3229 }
3230 return best_match;
3231 }
3232
3233 /* Function: find_pc_mapped_section (PC)
3234 If PC falls into the VMA address range of an overlay section that is
3235 currently marked as MAPPED, return that section. Else return NULL. */
3236
3237 struct obj_section *
3238 find_pc_mapped_section (CORE_ADDR pc)
3239 {
3240 struct objfile *objfile;
3241 struct obj_section *osect;
3242
3243 if (overlay_debugging)
3244 ALL_OBJSECTIONS (objfile, osect)
3245 if (pc_in_mapped_range (pc, osect) && section_is_mapped (osect))
3246 return osect;
3247
3248 return NULL;
3249 }
3250
3251 /* Function: list_overlays_command
3252 Print a list of mapped sections and their PC ranges. */
3253
3254 static void
3255 list_overlays_command (char *args, int from_tty)
3256 {
3257 int nmapped = 0;
3258 struct objfile *objfile;
3259 struct obj_section *osect;
3260
3261 if (overlay_debugging)
3262 ALL_OBJSECTIONS (objfile, osect)
3263 if (section_is_mapped (osect))
3264 {
3265 struct gdbarch *gdbarch = get_objfile_arch (objfile);
3266 const char *name;
3267 bfd_vma lma, vma;
3268 int size;
3269
3270 vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section);
3271 lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section);
3272 size = bfd_get_section_size (osect->the_bfd_section);
3273 name = bfd_section_name (objfile->obfd, osect->the_bfd_section);
3274
3275 printf_filtered ("Section %s, loaded at ", name);
3276 fputs_filtered (paddress (gdbarch, lma), gdb_stdout);
3277 puts_filtered (" - ");
3278 fputs_filtered (paddress (gdbarch, lma + size), gdb_stdout);
3279 printf_filtered (", mapped at ");
3280 fputs_filtered (paddress (gdbarch, vma), gdb_stdout);
3281 puts_filtered (" - ");
3282 fputs_filtered (paddress (gdbarch, vma + size), gdb_stdout);
3283 puts_filtered ("\n");
3284
3285 nmapped++;
3286 }
3287 if (nmapped == 0)
3288 printf_filtered (_("No sections are mapped.\n"));
3289 }
3290
3291 /* Function: map_overlay_command
3292 Mark the named section as mapped (ie. residing at its VMA address). */
3293
3294 static void
3295 map_overlay_command (char *args, int from_tty)
3296 {
3297 struct objfile *objfile, *objfile2;
3298 struct obj_section *sec, *sec2;
3299
3300 if (!overlay_debugging)
3301 error (_("Overlay debugging not enabled. Use "
3302 "either the 'overlay auto' or\n"
3303 "the 'overlay manual' command."));
3304
3305 if (args == 0 || *args == 0)
3306 error (_("Argument required: name of an overlay section"));
3307
3308 /* First, find a section matching the user supplied argument. */
3309 ALL_OBJSECTIONS (objfile, sec)
3310 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
3311 {
3312 /* Now, check to see if the section is an overlay. */
3313 if (!section_is_overlay (sec))
3314 continue; /* not an overlay section */
3315
3316 /* Mark the overlay as "mapped". */
3317 sec->ovly_mapped = 1;
3318
3319 /* Next, make a pass and unmap any sections that are
3320 overlapped by this new section: */
3321 ALL_OBJSECTIONS (objfile2, sec2)
3322 if (sec2->ovly_mapped && sec != sec2 && sections_overlap (sec, sec2))
3323 {
3324 if (info_verbose)
3325 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3326 bfd_section_name (objfile->obfd,
3327 sec2->the_bfd_section));
3328 sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2. */
3329 }
3330 return;
3331 }
3332 error (_("No overlay section called %s"), args);
3333 }
3334
3335 /* Function: unmap_overlay_command
3336 Mark the overlay section as unmapped
3337 (ie. resident in its LMA address range, rather than the VMA range). */
3338
3339 static void
3340 unmap_overlay_command (char *args, int from_tty)
3341 {
3342 struct objfile *objfile;
3343 struct obj_section *sec;
3344
3345 if (!overlay_debugging)
3346 error (_("Overlay debugging not enabled. "
3347 "Use either the 'overlay auto' or\n"
3348 "the 'overlay manual' command."));
3349
3350 if (args == 0 || *args == 0)
3351 error (_("Argument required: name of an overlay section"));
3352
3353 /* First, find a section matching the user supplied argument. */
3354 ALL_OBJSECTIONS (objfile, sec)
3355 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
3356 {
3357 if (!sec->ovly_mapped)
3358 error (_("Section %s is not mapped"), args);
3359 sec->ovly_mapped = 0;
3360 return;
3361 }
3362 error (_("No overlay section called %s"), args);
3363 }
3364
3365 /* Function: overlay_auto_command
3366 A utility command to turn on overlay debugging.
3367 Possibly this should be done via a set/show command. */
3368
3369 static void
3370 overlay_auto_command (char *args, int from_tty)
3371 {
3372 overlay_debugging = ovly_auto;
3373 enable_overlay_breakpoints ();
3374 if (info_verbose)
3375 printf_unfiltered (_("Automatic overlay debugging enabled."));
3376 }
3377
3378 /* Function: overlay_manual_command
3379 A utility command to turn on overlay debugging.
3380 Possibly this should be done via a set/show command. */
3381
3382 static void
3383 overlay_manual_command (char *args, int from_tty)
3384 {
3385 overlay_debugging = ovly_on;
3386 disable_overlay_breakpoints ();
3387 if (info_verbose)
3388 printf_unfiltered (_("Overlay debugging enabled."));
3389 }
3390
3391 /* Function: overlay_off_command
3392 A utility command to turn on overlay debugging.
3393 Possibly this should be done via a set/show command. */
3394
3395 static void
3396 overlay_off_command (char *args, int from_tty)
3397 {
3398 overlay_debugging = ovly_off;
3399 disable_overlay_breakpoints ();
3400 if (info_verbose)
3401 printf_unfiltered (_("Overlay debugging disabled."));
3402 }
3403
3404 static void
3405 overlay_load_command (char *args, int from_tty)
3406 {
3407 struct gdbarch *gdbarch = get_current_arch ();
3408
3409 if (gdbarch_overlay_update_p (gdbarch))
3410 gdbarch_overlay_update (gdbarch, NULL);
3411 else
3412 error (_("This target does not know how to read its overlay state."));
3413 }
3414
3415 /* Function: overlay_command
3416 A place-holder for a mis-typed command. */
3417
3418 /* Command list chain containing all defined "overlay" subcommands. */
3419 static struct cmd_list_element *overlaylist;
3420
3421 static void
3422 overlay_command (char *args, int from_tty)
3423 {
3424 printf_unfiltered
3425 ("\"overlay\" must be followed by the name of an overlay command.\n");
3426 help_list (overlaylist, "overlay ", -1, gdb_stdout);
3427 }
3428
3429 /* Target Overlays for the "Simplest" overlay manager:
3430
3431 This is GDB's default target overlay layer. It works with the
3432 minimal overlay manager supplied as an example by Cygnus. The
3433 entry point is via a function pointer "gdbarch_overlay_update",
3434 so targets that use a different runtime overlay manager can
3435 substitute their own overlay_update function and take over the
3436 function pointer.
3437
3438 The overlay_update function pokes around in the target's data structures
3439 to see what overlays are mapped, and updates GDB's overlay mapping with
3440 this information.
3441
3442 In this simple implementation, the target data structures are as follows:
3443 unsigned _novlys; /# number of overlay sections #/
3444 unsigned _ovly_table[_novlys][4] = {
3445 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3446 {..., ..., ..., ...},
3447 }
3448 unsigned _novly_regions; /# number of overlay regions #/
3449 unsigned _ovly_region_table[_novly_regions][3] = {
3450 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3451 {..., ..., ...},
3452 }
3453 These functions will attempt to update GDB's mappedness state in the
3454 symbol section table, based on the target's mappedness state.
3455
3456 To do this, we keep a cached copy of the target's _ovly_table, and
3457 attempt to detect when the cached copy is invalidated. The main
3458 entry point is "simple_overlay_update(SECT), which looks up SECT in
3459 the cached table and re-reads only the entry for that section from
3460 the target (whenever possible). */
3461
3462 /* Cached, dynamically allocated copies of the target data structures: */
3463 static unsigned (*cache_ovly_table)[4] = 0;
3464 static unsigned cache_novlys = 0;
3465 static CORE_ADDR cache_ovly_table_base = 0;
3466 enum ovly_index
3467 {
3468 VMA, SIZE, LMA, MAPPED
3469 };
3470
3471 /* Throw away the cached copy of _ovly_table. */
3472
3473 static void
3474 simple_free_overlay_table (void)
3475 {
3476 if (cache_ovly_table)
3477 xfree (cache_ovly_table);
3478 cache_novlys = 0;
3479 cache_ovly_table = NULL;
3480 cache_ovly_table_base = 0;
3481 }
3482
3483 /* Read an array of ints of size SIZE from the target into a local buffer.
3484 Convert to host order. int LEN is number of ints. */
3485
3486 static void
3487 read_target_long_array (CORE_ADDR memaddr, unsigned int *myaddr,
3488 int len, int size, enum bfd_endian byte_order)
3489 {
3490 /* FIXME (alloca): Not safe if array is very large. */
3491 gdb_byte *buf = alloca (len * size);
3492 int i;
3493
3494 read_memory (memaddr, buf, len * size);
3495 for (i = 0; i < len; i++)
3496 myaddr[i] = extract_unsigned_integer (size * i + buf, size, byte_order);
3497 }
3498
3499 /* Find and grab a copy of the target _ovly_table
3500 (and _novlys, which is needed for the table's size). */
3501
3502 static int
3503 simple_read_overlay_table (void)
3504 {
3505 struct minimal_symbol *novlys_msym;
3506 struct bound_minimal_symbol ovly_table_msym;
3507 struct gdbarch *gdbarch;
3508 int word_size;
3509 enum bfd_endian byte_order;
3510
3511 simple_free_overlay_table ();
3512 novlys_msym = lookup_minimal_symbol ("_novlys", NULL, NULL);
3513 if (! novlys_msym)
3514 {
3515 error (_("Error reading inferior's overlay table: "
3516 "couldn't find `_novlys' variable\n"
3517 "in inferior. Use `overlay manual' mode."));
3518 return 0;
3519 }
3520
3521 ovly_table_msym = lookup_bound_minimal_symbol ("_ovly_table");
3522 if (! ovly_table_msym.minsym)
3523 {
3524 error (_("Error reading inferior's overlay table: couldn't find "
3525 "`_ovly_table' array\n"
3526 "in inferior. Use `overlay manual' mode."));
3527 return 0;
3528 }
3529
3530 gdbarch = get_objfile_arch (ovly_table_msym.objfile);
3531 word_size = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT;
3532 byte_order = gdbarch_byte_order (gdbarch);
3533
3534 cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym),
3535 4, byte_order);
3536 cache_ovly_table
3537 = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table));
3538 cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (ovly_table_msym.minsym);
3539 read_target_long_array (cache_ovly_table_base,
3540 (unsigned int *) cache_ovly_table,
3541 cache_novlys * 4, word_size, byte_order);
3542
3543 return 1; /* SUCCESS */
3544 }
3545
3546 /* Function: simple_overlay_update_1
3547 A helper function for simple_overlay_update. Assuming a cached copy
3548 of _ovly_table exists, look through it to find an entry whose vma,
3549 lma and size match those of OSECT. Re-read the entry and make sure
3550 it still matches OSECT (else the table may no longer be valid).
3551 Set OSECT's mapped state to match the entry. Return: 1 for
3552 success, 0 for failure. */
3553
3554 static int
3555 simple_overlay_update_1 (struct obj_section *osect)
3556 {
3557 int i, size;
3558 bfd *obfd = osect->objfile->obfd;
3559 asection *bsect = osect->the_bfd_section;
3560 struct gdbarch *gdbarch = get_objfile_arch (osect->objfile);
3561 int word_size = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT;
3562 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3563
3564 size = bfd_get_section_size (osect->the_bfd_section);
3565 for (i = 0; i < cache_novlys; i++)
3566 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3567 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3568 /* && cache_ovly_table[i][SIZE] == size */ )
3569 {
3570 read_target_long_array (cache_ovly_table_base + i * word_size,
3571 (unsigned int *) cache_ovly_table[i],
3572 4, word_size, byte_order);
3573 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3574 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3575 /* && cache_ovly_table[i][SIZE] == size */ )
3576 {
3577 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3578 return 1;
3579 }
3580 else /* Warning! Warning! Target's ovly table has changed! */
3581 return 0;
3582 }
3583 return 0;
3584 }
3585
3586 /* Function: simple_overlay_update
3587 If OSECT is NULL, then update all sections' mapped state
3588 (after re-reading the entire target _ovly_table).
3589 If OSECT is non-NULL, then try to find a matching entry in the
3590 cached ovly_table and update only OSECT's mapped state.
3591 If a cached entry can't be found or the cache isn't valid, then
3592 re-read the entire cache, and go ahead and update all sections. */
3593
3594 void
3595 simple_overlay_update (struct obj_section *osect)
3596 {
3597 struct objfile *objfile;
3598
3599 /* Were we given an osect to look up? NULL means do all of them. */
3600 if (osect)
3601 /* Have we got a cached copy of the target's overlay table? */
3602 if (cache_ovly_table != NULL)
3603 {
3604 /* Does its cached location match what's currently in the
3605 symtab? */
3606 struct minimal_symbol *minsym
3607 = lookup_minimal_symbol ("_ovly_table", NULL, NULL);
3608
3609 if (minsym == NULL)
3610 error (_("Error reading inferior's overlay table: couldn't "
3611 "find `_ovly_table' array\n"
3612 "in inferior. Use `overlay manual' mode."));
3613
3614 if (cache_ovly_table_base == SYMBOL_VALUE_ADDRESS (minsym))
3615 /* Then go ahead and try to look up this single section in
3616 the cache. */
3617 if (simple_overlay_update_1 (osect))
3618 /* Found it! We're done. */
3619 return;
3620 }
3621
3622 /* Cached table no good: need to read the entire table anew.
3623 Or else we want all the sections, in which case it's actually
3624 more efficient to read the whole table in one block anyway. */
3625
3626 if (! simple_read_overlay_table ())
3627 return;
3628
3629 /* Now may as well update all sections, even if only one was requested. */
3630 ALL_OBJSECTIONS (objfile, osect)
3631 if (section_is_overlay (osect))
3632 {
3633 int i, size;
3634 bfd *obfd = osect->objfile->obfd;
3635 asection *bsect = osect->the_bfd_section;
3636
3637 size = bfd_get_section_size (bsect);
3638 for (i = 0; i < cache_novlys; i++)
3639 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3640 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3641 /* && cache_ovly_table[i][SIZE] == size */ )
3642 { /* obj_section matches i'th entry in ovly_table. */
3643 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3644 break; /* finished with inner for loop: break out. */
3645 }
3646 }
3647 }
3648
3649 /* Set the output sections and output offsets for section SECTP in
3650 ABFD. The relocation code in BFD will read these offsets, so we
3651 need to be sure they're initialized. We map each section to itself,
3652 with no offset; this means that SECTP->vma will be honored. */
3653
3654 static void
3655 symfile_dummy_outputs (bfd *abfd, asection *sectp, void *dummy)
3656 {
3657 sectp->output_section = sectp;
3658 sectp->output_offset = 0;
3659 }
3660
3661 /* Default implementation for sym_relocate. */
3662
3663 bfd_byte *
3664 default_symfile_relocate (struct objfile *objfile, asection *sectp,
3665 bfd_byte *buf)
3666 {
3667 /* Use sectp->owner instead of objfile->obfd. sectp may point to a
3668 DWO file. */
3669 bfd *abfd = sectp->owner;
3670
3671 /* We're only interested in sections with relocation
3672 information. */
3673 if ((sectp->flags & SEC_RELOC) == 0)
3674 return NULL;
3675
3676 /* We will handle section offsets properly elsewhere, so relocate as if
3677 all sections begin at 0. */
3678 bfd_map_over_sections (abfd, symfile_dummy_outputs, NULL);
3679
3680 return bfd_simple_get_relocated_section_contents (abfd, sectp, buf, NULL);
3681 }
3682
3683 /* Relocate the contents of a debug section SECTP in ABFD. The
3684 contents are stored in BUF if it is non-NULL, or returned in a
3685 malloc'd buffer otherwise.
3686
3687 For some platforms and debug info formats, shared libraries contain
3688 relocations against the debug sections (particularly for DWARF-2;
3689 one affected platform is PowerPC GNU/Linux, although it depends on
3690 the version of the linker in use). Also, ELF object files naturally
3691 have unresolved relocations for their debug sections. We need to apply
3692 the relocations in order to get the locations of symbols correct.
3693 Another example that may require relocation processing, is the
3694 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3695 debug section. */
3696
3697 bfd_byte *
3698 symfile_relocate_debug_section (struct objfile *objfile,
3699 asection *sectp, bfd_byte *buf)
3700 {
3701 gdb_assert (objfile->sf->sym_relocate);
3702
3703 return (*objfile->sf->sym_relocate) (objfile, sectp, buf);
3704 }
3705
3706 struct symfile_segment_data *
3707 get_symfile_segment_data (bfd *abfd)
3708 {
3709 const struct sym_fns *sf = find_sym_fns (abfd);
3710
3711 if (sf == NULL)
3712 return NULL;
3713
3714 return sf->sym_segments (abfd);
3715 }
3716
3717 void
3718 free_symfile_segment_data (struct symfile_segment_data *data)
3719 {
3720 xfree (data->segment_bases);
3721 xfree (data->segment_sizes);
3722 xfree (data->segment_info);
3723 xfree (data);
3724 }
3725
3726 /* Given:
3727 - DATA, containing segment addresses from the object file ABFD, and
3728 the mapping from ABFD's sections onto the segments that own them,
3729 and
3730 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3731 segment addresses reported by the target,
3732 store the appropriate offsets for each section in OFFSETS.
3733
3734 If there are fewer entries in SEGMENT_BASES than there are segments
3735 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3736
3737 If there are more entries, then ignore the extra. The target may
3738 not be able to distinguish between an empty data segment and a
3739 missing data segment; a missing text segment is less plausible. */
3740
3741 int
3742 symfile_map_offsets_to_segments (bfd *abfd,
3743 const struct symfile_segment_data *data,
3744 struct section_offsets *offsets,
3745 int num_segment_bases,
3746 const CORE_ADDR *segment_bases)
3747 {
3748 int i;
3749 asection *sect;
3750
3751 /* It doesn't make sense to call this function unless you have some
3752 segment base addresses. */
3753 gdb_assert (num_segment_bases > 0);
3754
3755 /* If we do not have segment mappings for the object file, we
3756 can not relocate it by segments. */
3757 gdb_assert (data != NULL);
3758 gdb_assert (data->num_segments > 0);
3759
3760 for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next)
3761 {
3762 int which = data->segment_info[i];
3763
3764 gdb_assert (0 <= which && which <= data->num_segments);
3765
3766 /* Don't bother computing offsets for sections that aren't
3767 loaded as part of any segment. */
3768 if (! which)
3769 continue;
3770
3771 /* Use the last SEGMENT_BASES entry as the address of any extra
3772 segments mentioned in DATA->segment_info. */
3773 if (which > num_segment_bases)
3774 which = num_segment_bases;
3775
3776 offsets->offsets[i] = (segment_bases[which - 1]
3777 - data->segment_bases[which - 1]);
3778 }
3779
3780 return 1;
3781 }
3782
3783 static void
3784 symfile_find_segment_sections (struct objfile *objfile)
3785 {
3786 bfd *abfd = objfile->obfd;
3787 int i;
3788 asection *sect;
3789 struct symfile_segment_data *data;
3790
3791 data = get_symfile_segment_data (objfile->obfd);
3792 if (data == NULL)
3793 return;
3794
3795 if (data->num_segments != 1 && data->num_segments != 2)
3796 {
3797 free_symfile_segment_data (data);
3798 return;
3799 }
3800
3801 for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next)
3802 {
3803 int which = data->segment_info[i];
3804
3805 if (which == 1)
3806 {
3807 if (objfile->sect_index_text == -1)
3808 objfile->sect_index_text = sect->index;
3809
3810 if (objfile->sect_index_rodata == -1)
3811 objfile->sect_index_rodata = sect->index;
3812 }
3813 else if (which == 2)
3814 {
3815 if (objfile->sect_index_data == -1)
3816 objfile->sect_index_data = sect->index;
3817
3818 if (objfile->sect_index_bss == -1)
3819 objfile->sect_index_bss = sect->index;
3820 }
3821 }
3822
3823 free_symfile_segment_data (data);
3824 }
3825
3826 /* Listen for free_objfile events. */
3827
3828 static void
3829 symfile_free_objfile (struct objfile *objfile)
3830 {
3831 /* Remove the target sections of user-added objfiles. */
3832 if (objfile != 0 && objfile->flags & OBJF_USERLOADED)
3833 remove_target_sections ((void *) objfile);
3834 }
3835
3836 void
3837 _initialize_symfile (void)
3838 {
3839 struct cmd_list_element *c;
3840
3841 observer_attach_free_objfile (symfile_free_objfile);
3842
3843 c = add_cmd ("symbol-file", class_files, symbol_file_command, _("\
3844 Load symbol table from executable file FILE.\n\
3845 The `file' command can also load symbol tables, as well as setting the file\n\
3846 to execute."), &cmdlist);
3847 set_cmd_completer (c, filename_completer);
3848
3849 c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command, _("\
3850 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3851 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR>\
3852 ...]\nADDR is the starting address of the file's text.\n\
3853 The optional arguments are section-name section-address pairs and\n\
3854 should be specified if the data and bss segments are not contiguous\n\
3855 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3856 &cmdlist);
3857 set_cmd_completer (c, filename_completer);
3858
3859 c = add_cmd ("remove-symbol-file", class_files,
3860 remove_symbol_file_command, _("\
3861 Remove a symbol file added via the add-symbol-file command.\n\
3862 Usage: remove-symbol-file FILENAME\n\
3863 remove-symbol-file -a ADDRESS\n\
3864 The file to remove can be identified by its filename or by an address\n\
3865 that lies within the boundaries of this symbol file in memory."),
3866 &cmdlist);
3867
3868 c = add_cmd ("load", class_files, load_command, _("\
3869 Dynamically load FILE into the running program, and record its symbols\n\
3870 for access from GDB.\n\
3871 A load OFFSET may also be given."), &cmdlist);
3872 set_cmd_completer (c, filename_completer);
3873
3874 add_prefix_cmd ("overlay", class_support, overlay_command,
3875 _("Commands for debugging overlays."), &overlaylist,
3876 "overlay ", 0, &cmdlist);
3877
3878 add_com_alias ("ovly", "overlay", class_alias, 1);
3879 add_com_alias ("ov", "overlay", class_alias, 1);
3880
3881 add_cmd ("map-overlay", class_support, map_overlay_command,
3882 _("Assert that an overlay section is mapped."), &overlaylist);
3883
3884 add_cmd ("unmap-overlay", class_support, unmap_overlay_command,
3885 _("Assert that an overlay section is unmapped."), &overlaylist);
3886
3887 add_cmd ("list-overlays", class_support, list_overlays_command,
3888 _("List mappings of overlay sections."), &overlaylist);
3889
3890 add_cmd ("manual", class_support, overlay_manual_command,
3891 _("Enable overlay debugging."), &overlaylist);
3892 add_cmd ("off", class_support, overlay_off_command,
3893 _("Disable overlay debugging."), &overlaylist);
3894 add_cmd ("auto", class_support, overlay_auto_command,
3895 _("Enable automatic overlay debugging."), &overlaylist);
3896 add_cmd ("load-target", class_support, overlay_load_command,
3897 _("Read the overlay mapping state from the target."), &overlaylist);
3898
3899 /* Filename extension to source language lookup table: */
3900 init_filename_language_table ();
3901 add_setshow_string_noescape_cmd ("extension-language", class_files,
3902 &ext_args, _("\
3903 Set mapping between filename extension and source language."), _("\
3904 Show mapping between filename extension and source language."), _("\
3905 Usage: set extension-language .foo bar"),
3906 set_ext_lang_command,
3907 show_ext_args,
3908 &setlist, &showlist);
3909
3910 add_info ("extensions", info_ext_lang_command,
3911 _("All filename extensions associated with a source language."));
3912
3913 add_setshow_optional_filename_cmd ("debug-file-directory", class_support,
3914 &debug_file_directory, _("\
3915 Set the directories where separate debug symbols are searched for."), _("\
3916 Show the directories where separate debug symbols are searched for."), _("\
3917 Separate debug symbols are first searched for in the same\n\
3918 directory as the binary, then in the `" DEBUG_SUBDIRECTORY "' subdirectory,\n\
3919 and lastly at the path of the directory of the binary with\n\
3920 each global debug-file-directory component prepended."),
3921 NULL,
3922 show_debug_file_directory,
3923 &setlist, &showlist);
3924 }
This page took 0.192633 seconds and 4 git commands to generate.