1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright (C) 1990-2012 Free Software Foundation, Inc.
5 Contributed by Cygnus Support, using pieces from other GDB modules.
7 This file is part of GDB.
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.
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.
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/>. */
23 #include "arch-utils.h"
35 #include "breakpoint.h"
37 #include "complaints.h"
41 #include "filenames.h" /* for DOSish file names */
42 #include "gdb-stabs.h"
43 #include "gdb_obstack.h"
44 #include "completer.h"
47 #include "readline/readline.h"
48 #include "gdb_assert.h"
52 #include "parser-defs.h"
60 #include <sys/types.h>
62 #include "gdb_string.h"
70 int (*deprecated_ui_load_progress_hook) (const char *section,
72 void (*deprecated_show_load_progress) (const char *section,
73 unsigned long section_sent,
74 unsigned long section_size,
75 unsigned long total_sent,
76 unsigned long total_size);
77 void (*deprecated_pre_add_symbol_hook) (const char *);
78 void (*deprecated_post_add_symbol_hook) (void);
80 static void clear_symtab_users_cleanup (void *ignore);
82 /* Global variables owned by this file. */
83 int readnow_symbol_files; /* Read full symbols immediately. */
85 /* External variables and functions referenced. */
87 extern void report_transfer_performance (unsigned long, time_t, time_t);
89 /* Functions this file defines. */
91 static void load_command (char *, int);
93 static void symbol_file_add_main_1 (char *args, int from_tty, int flags);
95 static void add_symbol_file_command (char *, int);
97 bfd *symfile_bfd_open (char *);
99 int get_section_index (struct objfile *, char *);
101 static const struct sym_fns *find_sym_fns (bfd *);
103 static void decrement_reading_symtab (void *);
105 static void overlay_invalidate_all (void);
107 void list_overlays_command (char *, int);
109 void map_overlay_command (char *, int);
111 void unmap_overlay_command (char *, int);
113 static void overlay_auto_command (char *, int);
115 static void overlay_manual_command (char *, int);
117 static void overlay_off_command (char *, int);
119 static void overlay_load_command (char *, int);
121 static void overlay_command (char *, int);
123 static void simple_free_overlay_table (void);
125 static void read_target_long_array (CORE_ADDR, unsigned int *, int, int,
128 static int simple_read_overlay_table (void);
130 static int simple_overlay_update_1 (struct obj_section *);
132 static void add_filename_language (char *ext, enum language lang);
134 static void info_ext_lang_command (char *args, int from_tty);
136 static void init_filename_language_table (void);
138 static void symfile_find_segment_sections (struct objfile *objfile);
140 void _initialize_symfile (void);
142 /* List of all available sym_fns. On gdb startup, each object file reader
143 calls add_symtab_fns() to register information on each format it is
146 typedef const struct sym_fns *sym_fns_ptr;
147 DEF_VEC_P (sym_fns_ptr);
149 static VEC (sym_fns_ptr) *symtab_fns = NULL;
151 /* If non-zero, shared library symbols will be added automatically
152 when the inferior is created, new libraries are loaded, or when
153 attaching to the inferior. This is almost always what users will
154 want to have happen; but for very large programs, the startup time
155 will be excessive, and so if this is a problem, the user can clear
156 this flag and then add the shared library symbols as needed. Note
157 that there is a potential for confusion, since if the shared
158 library symbols are not loaded, commands like "info fun" will *not*
159 report all the functions that are actually present. */
161 int auto_solib_add = 1;
164 /* Make a null terminated copy of the string at PTR with SIZE characters in
165 the obstack pointed to by OBSTACKP . Returns the address of the copy.
166 Note that the string at PTR does not have to be null terminated, I.e. it
167 may be part of a larger string and we are only saving a substring. */
170 obsavestring (const char *ptr, int size, struct obstack *obstackp)
172 char *p = (char *) obstack_alloc (obstackp, size + 1);
173 /* Open-coded memcpy--saves function call time. These strings are usually
174 short. FIXME: Is this really still true with a compiler that can
177 const char *p1 = ptr;
179 const char *end = ptr + size;
188 /* Concatenate NULL terminated variable argument list of `const char *'
189 strings; return the new string. Space is found in the OBSTACKP.
190 Argument list must be terminated by a sentinel expression `(char *)
194 obconcat (struct obstack *obstackp, ...)
198 va_start (ap, obstackp);
201 const char *s = va_arg (ap, const char *);
206 obstack_grow_str (obstackp, s);
209 obstack_1grow (obstackp, 0);
211 return obstack_finish (obstackp);
214 /* True if we are reading a symbol table. */
216 int currently_reading_symtab = 0;
219 decrement_reading_symtab (void *dummy)
221 currently_reading_symtab--;
224 /* Increment currently_reading_symtab and return a cleanup that can be
225 used to decrement it. */
227 increment_reading_symtab (void)
229 ++currently_reading_symtab;
230 return make_cleanup (decrement_reading_symtab, NULL);
233 /* Remember the lowest-addressed loadable section we've seen.
234 This function is called via bfd_map_over_sections.
236 In case of equal vmas, the section with the largest size becomes the
237 lowest-addressed loadable section.
239 If the vmas and sizes are equal, the last section is considered the
240 lowest-addressed loadable section. */
243 find_lowest_section (bfd *abfd, asection *sect, void *obj)
245 asection **lowest = (asection **) obj;
247 if (0 == (bfd_get_section_flags (abfd, sect) & (SEC_ALLOC | SEC_LOAD)))
250 *lowest = sect; /* First loadable section */
251 else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect))
252 *lowest = sect; /* A lower loadable section */
253 else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect)
254 && (bfd_section_size (abfd, (*lowest))
255 <= bfd_section_size (abfd, sect)))
259 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
261 struct section_addr_info *
262 alloc_section_addr_info (size_t num_sections)
264 struct section_addr_info *sap;
267 size = (sizeof (struct section_addr_info)
268 + sizeof (struct other_sections) * (num_sections - 1));
269 sap = (struct section_addr_info *) xmalloc (size);
270 memset (sap, 0, size);
271 sap->num_sections = num_sections;
276 /* Build (allocate and populate) a section_addr_info struct from
277 an existing section table. */
279 extern struct section_addr_info *
280 build_section_addr_info_from_section_table (const struct target_section *start,
281 const struct target_section *end)
283 struct section_addr_info *sap;
284 const struct target_section *stp;
287 sap = alloc_section_addr_info (end - start);
289 for (stp = start, oidx = 0; stp != end; stp++)
291 if (bfd_get_section_flags (stp->bfd,
292 stp->the_bfd_section) & (SEC_ALLOC | SEC_LOAD)
293 && oidx < end - start)
295 sap->other[oidx].addr = stp->addr;
296 sap->other[oidx].name
297 = xstrdup (bfd_section_name (stp->bfd, stp->the_bfd_section));
298 sap->other[oidx].sectindex = stp->the_bfd_section->index;
306 /* Create a section_addr_info from section offsets in ABFD. */
308 static struct section_addr_info *
309 build_section_addr_info_from_bfd (bfd *abfd)
311 struct section_addr_info *sap;
313 struct bfd_section *sec;
315 sap = alloc_section_addr_info (bfd_count_sections (abfd));
316 for (i = 0, sec = abfd->sections; sec != NULL; sec = sec->next)
317 if (bfd_get_section_flags (abfd, sec) & (SEC_ALLOC | SEC_LOAD))
319 sap->other[i].addr = bfd_get_section_vma (abfd, sec);
320 sap->other[i].name = xstrdup (bfd_get_section_name (abfd, sec));
321 sap->other[i].sectindex = sec->index;
327 /* Create a section_addr_info from section offsets in OBJFILE. */
329 struct section_addr_info *
330 build_section_addr_info_from_objfile (const struct objfile *objfile)
332 struct section_addr_info *sap;
335 /* Before reread_symbols gets rewritten it is not safe to call:
336 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
338 sap = build_section_addr_info_from_bfd (objfile->obfd);
339 for (i = 0; i < sap->num_sections && sap->other[i].name; i++)
341 int sectindex = sap->other[i].sectindex;
343 sap->other[i].addr += objfile->section_offsets->offsets[sectindex];
348 /* Free all memory allocated by build_section_addr_info_from_section_table. */
351 free_section_addr_info (struct section_addr_info *sap)
355 for (idx = 0; idx < sap->num_sections; idx++)
356 if (sap->other[idx].name)
357 xfree (sap->other[idx].name);
362 /* Initialize OBJFILE's sect_index_* members. */
364 init_objfile_sect_indices (struct objfile *objfile)
369 sect = bfd_get_section_by_name (objfile->obfd, ".text");
371 objfile->sect_index_text = sect->index;
373 sect = bfd_get_section_by_name (objfile->obfd, ".data");
375 objfile->sect_index_data = sect->index;
377 sect = bfd_get_section_by_name (objfile->obfd, ".bss");
379 objfile->sect_index_bss = sect->index;
381 sect = bfd_get_section_by_name (objfile->obfd, ".rodata");
383 objfile->sect_index_rodata = sect->index;
385 /* This is where things get really weird... We MUST have valid
386 indices for the various sect_index_* members or gdb will abort.
387 So if for example, there is no ".text" section, we have to
388 accomodate that. First, check for a file with the standard
389 one or two segments. */
391 symfile_find_segment_sections (objfile);
393 /* Except when explicitly adding symbol files at some address,
394 section_offsets contains nothing but zeros, so it doesn't matter
395 which slot in section_offsets the individual sect_index_* members
396 index into. So if they are all zero, it is safe to just point
397 all the currently uninitialized indices to the first slot. But
398 beware: if this is the main executable, it may be relocated
399 later, e.g. by the remote qOffsets packet, and then this will
400 be wrong! That's why we try segments first. */
402 for (i = 0; i < objfile->num_sections; i++)
404 if (ANOFFSET (objfile->section_offsets, i) != 0)
409 if (i == objfile->num_sections)
411 if (objfile->sect_index_text == -1)
412 objfile->sect_index_text = 0;
413 if (objfile->sect_index_data == -1)
414 objfile->sect_index_data = 0;
415 if (objfile->sect_index_bss == -1)
416 objfile->sect_index_bss = 0;
417 if (objfile->sect_index_rodata == -1)
418 objfile->sect_index_rodata = 0;
422 /* The arguments to place_section. */
424 struct place_section_arg
426 struct section_offsets *offsets;
430 /* Find a unique offset to use for loadable section SECT if
431 the user did not provide an offset. */
434 place_section (bfd *abfd, asection *sect, void *obj)
436 struct place_section_arg *arg = obj;
437 CORE_ADDR *offsets = arg->offsets->offsets, start_addr;
439 ULONGEST align = ((ULONGEST) 1) << bfd_get_section_alignment (abfd, sect);
441 /* We are only interested in allocated sections. */
442 if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0)
445 /* If the user specified an offset, honor it. */
446 if (offsets[sect->index] != 0)
449 /* Otherwise, let's try to find a place for the section. */
450 start_addr = (arg->lowest + align - 1) & -align;
457 for (cur_sec = abfd->sections; cur_sec != NULL; cur_sec = cur_sec->next)
459 int indx = cur_sec->index;
461 /* We don't need to compare against ourself. */
465 /* We can only conflict with allocated sections. */
466 if ((bfd_get_section_flags (abfd, cur_sec) & SEC_ALLOC) == 0)
469 /* If the section offset is 0, either the section has not been placed
470 yet, or it was the lowest section placed (in which case LOWEST
471 will be past its end). */
472 if (offsets[indx] == 0)
475 /* If this section would overlap us, then we must move up. */
476 if (start_addr + bfd_get_section_size (sect) > offsets[indx]
477 && start_addr < offsets[indx] + bfd_get_section_size (cur_sec))
479 start_addr = offsets[indx] + bfd_get_section_size (cur_sec);
480 start_addr = (start_addr + align - 1) & -align;
485 /* Otherwise, we appear to be OK. So far. */
490 offsets[sect->index] = start_addr;
491 arg->lowest = start_addr + bfd_get_section_size (sect);
494 /* Store struct section_addr_info as prepared (made relative and with SECTINDEX
495 filled-in) by addr_info_make_relative into SECTION_OFFSETS of NUM_SECTIONS
499 relative_addr_info_to_section_offsets (struct section_offsets *section_offsets,
501 struct section_addr_info *addrs)
505 memset (section_offsets, 0, SIZEOF_N_SECTION_OFFSETS (num_sections));
507 /* Now calculate offsets for section that were specified by the caller. */
508 for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++)
510 struct other_sections *osp;
512 osp = &addrs->other[i];
513 if (osp->sectindex == -1)
516 /* Record all sections in offsets. */
517 /* The section_offsets in the objfile are here filled in using
519 section_offsets->offsets[osp->sectindex] = osp->addr;
523 /* Transform section name S for a name comparison. prelink can split section
524 `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly
525 prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address
526 of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss'
527 (`.sbss') section has invalid (increased) virtual address. */
530 addr_section_name (const char *s)
532 if (strcmp (s, ".dynbss") == 0)
534 if (strcmp (s, ".sdynbss") == 0)
540 /* qsort comparator for addrs_section_sort. Sort entries in ascending order by
541 their (name, sectindex) pair. sectindex makes the sort by name stable. */
544 addrs_section_compar (const void *ap, const void *bp)
546 const struct other_sections *a = *((struct other_sections **) ap);
547 const struct other_sections *b = *((struct other_sections **) bp);
550 retval = strcmp (addr_section_name (a->name), addr_section_name (b->name));
554 return a->sectindex - b->sectindex;
557 /* Provide sorted array of pointers to sections of ADDRS. The array is
558 terminated by NULL. Caller is responsible to call xfree for it. */
560 static struct other_sections **
561 addrs_section_sort (struct section_addr_info *addrs)
563 struct other_sections **array;
566 /* `+ 1' for the NULL terminator. */
567 array = xmalloc (sizeof (*array) * (addrs->num_sections + 1));
568 for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++)
569 array[i] = &addrs->other[i];
572 qsort (array, i, sizeof (*array), addrs_section_compar);
577 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
578 also SECTINDEXes specific to ABFD there. This function can be used to
579 rebase ADDRS to start referencing different BFD than before. */
582 addr_info_make_relative (struct section_addr_info *addrs, bfd *abfd)
584 asection *lower_sect;
585 CORE_ADDR lower_offset;
587 struct cleanup *my_cleanup;
588 struct section_addr_info *abfd_addrs;
589 struct other_sections **addrs_sorted, **abfd_addrs_sorted;
590 struct other_sections **addrs_to_abfd_addrs;
592 /* Find lowest loadable section to be used as starting point for
593 continguous sections. */
595 bfd_map_over_sections (abfd, find_lowest_section, &lower_sect);
596 if (lower_sect == NULL)
598 warning (_("no loadable sections found in added symbol-file %s"),
599 bfd_get_filename (abfd));
603 lower_offset = bfd_section_vma (bfd_get_filename (abfd), lower_sect);
605 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
606 in ABFD. Section names are not unique - there can be multiple sections of
607 the same name. Also the sections of the same name do not have to be
608 adjacent to each other. Some sections may be present only in one of the
609 files. Even sections present in both files do not have to be in the same
612 Use stable sort by name for the sections in both files. Then linearly
613 scan both lists matching as most of the entries as possible. */
615 addrs_sorted = addrs_section_sort (addrs);
616 my_cleanup = make_cleanup (xfree, addrs_sorted);
618 abfd_addrs = build_section_addr_info_from_bfd (abfd);
619 make_cleanup_free_section_addr_info (abfd_addrs);
620 abfd_addrs_sorted = addrs_section_sort (abfd_addrs);
621 make_cleanup (xfree, abfd_addrs_sorted);
623 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and
624 ABFD_ADDRS_SORTED. */
626 addrs_to_abfd_addrs = xzalloc (sizeof (*addrs_to_abfd_addrs)
627 * addrs->num_sections);
628 make_cleanup (xfree, addrs_to_abfd_addrs);
630 while (*addrs_sorted)
632 const char *sect_name = addr_section_name ((*addrs_sorted)->name);
634 while (*abfd_addrs_sorted
635 && strcmp (addr_section_name ((*abfd_addrs_sorted)->name),
639 if (*abfd_addrs_sorted
640 && strcmp (addr_section_name ((*abfd_addrs_sorted)->name),
645 /* Make the found item directly addressable from ADDRS. */
646 index_in_addrs = *addrs_sorted - addrs->other;
647 gdb_assert (addrs_to_abfd_addrs[index_in_addrs] == NULL);
648 addrs_to_abfd_addrs[index_in_addrs] = *abfd_addrs_sorted;
650 /* Never use the same ABFD entry twice. */
657 /* Calculate offsets for the loadable sections.
658 FIXME! Sections must be in order of increasing loadable section
659 so that contiguous sections can use the lower-offset!!!
661 Adjust offsets if the segments are not contiguous.
662 If the section is contiguous, its offset should be set to
663 the offset of the highest loadable section lower than it
664 (the loadable section directly below it in memory).
665 this_offset = lower_offset = lower_addr - lower_orig_addr */
667 for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++)
669 struct other_sections *sect = addrs_to_abfd_addrs[i];
673 /* This is the index used by BFD. */
674 addrs->other[i].sectindex = sect->sectindex;
676 if (addrs->other[i].addr != 0)
678 addrs->other[i].addr -= sect->addr;
679 lower_offset = addrs->other[i].addr;
682 addrs->other[i].addr = lower_offset;
686 /* addr_section_name transformation is not used for SECT_NAME. */
687 const char *sect_name = addrs->other[i].name;
689 /* This section does not exist in ABFD, which is normally
690 unexpected and we want to issue a warning.
692 However, the ELF prelinker does create a few sections which are
693 marked in the main executable as loadable (they are loaded in
694 memory from the DYNAMIC segment) and yet are not present in
695 separate debug info files. This is fine, and should not cause
696 a warning. Shared libraries contain just the section
697 ".gnu.liblist" but it is not marked as loadable there. There is
698 no other way to identify them than by their name as the sections
699 created by prelink have no special flags.
701 For the sections `.bss' and `.sbss' see addr_section_name. */
703 if (!(strcmp (sect_name, ".gnu.liblist") == 0
704 || strcmp (sect_name, ".gnu.conflict") == 0
705 || (strcmp (sect_name, ".bss") == 0
707 && strcmp (addrs->other[i - 1].name, ".dynbss") == 0
708 && addrs_to_abfd_addrs[i - 1] != NULL)
709 || (strcmp (sect_name, ".sbss") == 0
711 && strcmp (addrs->other[i - 1].name, ".sdynbss") == 0
712 && addrs_to_abfd_addrs[i - 1] != NULL)))
713 warning (_("section %s not found in %s"), sect_name,
714 bfd_get_filename (abfd));
716 addrs->other[i].addr = 0;
717 addrs->other[i].sectindex = -1;
721 do_cleanups (my_cleanup);
724 /* Parse the user's idea of an offset for dynamic linking, into our idea
725 of how to represent it for fast symbol reading. This is the default
726 version of the sym_fns.sym_offsets function for symbol readers that
727 don't need to do anything special. It allocates a section_offsets table
728 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
731 default_symfile_offsets (struct objfile *objfile,
732 struct section_addr_info *addrs)
734 objfile->num_sections = bfd_count_sections (objfile->obfd);
735 objfile->section_offsets = (struct section_offsets *)
736 obstack_alloc (&objfile->objfile_obstack,
737 SIZEOF_N_SECTION_OFFSETS (objfile->num_sections));
738 relative_addr_info_to_section_offsets (objfile->section_offsets,
739 objfile->num_sections, addrs);
741 /* For relocatable files, all loadable sections will start at zero.
742 The zero is meaningless, so try to pick arbitrary addresses such
743 that no loadable sections overlap. This algorithm is quadratic,
744 but the number of sections in a single object file is generally
746 if ((bfd_get_file_flags (objfile->obfd) & (EXEC_P | DYNAMIC)) == 0)
748 struct place_section_arg arg;
749 bfd *abfd = objfile->obfd;
752 for (cur_sec = abfd->sections; cur_sec != NULL; cur_sec = cur_sec->next)
753 /* We do not expect this to happen; just skip this step if the
754 relocatable file has a section with an assigned VMA. */
755 if (bfd_section_vma (abfd, cur_sec) != 0)
760 CORE_ADDR *offsets = objfile->section_offsets->offsets;
762 /* Pick non-overlapping offsets for sections the user did not
764 arg.offsets = objfile->section_offsets;
766 bfd_map_over_sections (objfile->obfd, place_section, &arg);
768 /* Correctly filling in the section offsets is not quite
769 enough. Relocatable files have two properties that
770 (most) shared objects do not:
772 - Their debug information will contain relocations. Some
773 shared libraries do also, but many do not, so this can not
776 - If there are multiple code sections they will be loaded
777 at different relative addresses in memory than they are
778 in the objfile, since all sections in the file will start
781 Because GDB has very limited ability to map from an
782 address in debug info to the correct code section,
783 it relies on adding SECT_OFF_TEXT to things which might be
784 code. If we clear all the section offsets, and set the
785 section VMAs instead, then symfile_relocate_debug_section
786 will return meaningful debug information pointing at the
789 GDB has too many different data structures for section
790 addresses - a bfd, objfile, and so_list all have section
791 tables, as does exec_ops. Some of these could probably
794 for (cur_sec = abfd->sections; cur_sec != NULL;
795 cur_sec = cur_sec->next)
797 if ((bfd_get_section_flags (abfd, cur_sec) & SEC_ALLOC) == 0)
800 bfd_set_section_vma (abfd, cur_sec, offsets[cur_sec->index]);
801 exec_set_section_address (bfd_get_filename (abfd),
803 offsets[cur_sec->index]);
804 offsets[cur_sec->index] = 0;
809 /* Remember the bfd indexes for the .text, .data, .bss and
811 init_objfile_sect_indices (objfile);
815 /* Divide the file into segments, which are individual relocatable units.
816 This is the default version of the sym_fns.sym_segments function for
817 symbol readers that do not have an explicit representation of segments.
818 It assumes that object files do not have segments, and fully linked
819 files have a single segment. */
821 struct symfile_segment_data *
822 default_symfile_segments (bfd *abfd)
826 struct symfile_segment_data *data;
829 /* Relocatable files contain enough information to position each
830 loadable section independently; they should not be relocated
832 if ((bfd_get_file_flags (abfd) & (EXEC_P | DYNAMIC)) == 0)
835 /* Make sure there is at least one loadable section in the file. */
836 for (sect = abfd->sections; sect != NULL; sect = sect->next)
838 if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0)
846 low = bfd_get_section_vma (abfd, sect);
847 high = low + bfd_get_section_size (sect);
849 data = XZALLOC (struct symfile_segment_data);
850 data->num_segments = 1;
851 data->segment_bases = XCALLOC (1, CORE_ADDR);
852 data->segment_sizes = XCALLOC (1, CORE_ADDR);
854 num_sections = bfd_count_sections (abfd);
855 data->segment_info = XCALLOC (num_sections, int);
857 for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next)
861 if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0)
864 vma = bfd_get_section_vma (abfd, sect);
867 if (vma + bfd_get_section_size (sect) > high)
868 high = vma + bfd_get_section_size (sect);
870 data->segment_info[i] = 1;
873 data->segment_bases[0] = low;
874 data->segment_sizes[0] = high - low;
879 /* This is a convenience function to call sym_read for OBJFILE and
880 possibly force the partial symbols to be read. */
883 read_symbols (struct objfile *objfile, int add_flags)
885 (*objfile->sf->sym_read) (objfile, add_flags);
886 if (!objfile_has_partial_symbols (objfile))
888 bfd *abfd = find_separate_debug_file_in_section (objfile);
889 struct cleanup *cleanup = make_cleanup_bfd_unref (abfd);
892 symbol_file_add_separate (abfd, add_flags, objfile);
894 do_cleanups (cleanup);
896 if ((add_flags & SYMFILE_NO_READ) == 0)
897 require_partial_symbols (objfile, 0);
900 /* Process a symbol file, as either the main file or as a dynamically
903 OBJFILE is where the symbols are to be read from.
905 ADDRS is the list of section load addresses. If the user has given
906 an 'add-symbol-file' command, then this is the list of offsets and
907 addresses he or she provided as arguments to the command; or, if
908 we're handling a shared library, these are the actual addresses the
909 sections are loaded at, according to the inferior's dynamic linker
910 (as gleaned by GDB's shared library code). We convert each address
911 into an offset from the section VMA's as it appears in the object
912 file, and then call the file's sym_offsets function to convert this
913 into a format-specific offset table --- a `struct section_offsets'.
914 If ADDRS is non-zero, OFFSETS must be zero.
916 OFFSETS is a table of section offsets already in the right
917 format-specific representation. NUM_OFFSETS is the number of
918 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
919 assume this is the proper table the call to sym_offsets described
920 above would produce. Instead of calling sym_offsets, we just dump
921 it right into objfile->section_offsets. (When we're re-reading
922 symbols from an objfile, we don't have the original load address
923 list any more; all we have is the section offset table.) If
924 OFFSETS is non-zero, ADDRS must be zero.
926 ADD_FLAGS encodes verbosity level, whether this is main symbol or
927 an extra symbol file such as dynamically loaded code, and wether
928 breakpoint reset should be deferred. */
931 syms_from_objfile (struct objfile *objfile,
932 struct section_addr_info *addrs,
933 struct section_offsets *offsets,
937 struct section_addr_info *local_addr = NULL;
938 struct cleanup *old_chain;
939 const int mainline = add_flags & SYMFILE_MAINLINE;
941 gdb_assert (! (addrs && offsets));
943 init_entry_point_info (objfile);
944 objfile->sf = find_sym_fns (objfile->obfd);
946 if (objfile->sf == NULL)
947 return; /* No symbols. */
949 /* Make sure that partially constructed symbol tables will be cleaned up
950 if an error occurs during symbol reading. */
951 old_chain = make_cleanup_free_objfile (objfile);
953 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
954 list. We now establish the convention that an addr of zero means
955 no load address was specified. */
956 if (! addrs && ! offsets)
959 = alloc_section_addr_info (bfd_count_sections (objfile->obfd));
960 make_cleanup (xfree, local_addr);
964 /* Now either addrs or offsets is non-zero. */
968 /* We will modify the main symbol table, make sure that all its users
969 will be cleaned up if an error occurs during symbol reading. */
970 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
972 /* Since no error yet, throw away the old symbol table. */
974 if (symfile_objfile != NULL)
976 free_objfile (symfile_objfile);
977 gdb_assert (symfile_objfile == NULL);
980 /* Currently we keep symbols from the add-symbol-file command.
981 If the user wants to get rid of them, they should do "symbol-file"
982 without arguments first. Not sure this is the best behavior
985 (*objfile->sf->sym_new_init) (objfile);
988 /* Convert addr into an offset rather than an absolute address.
989 We find the lowest address of a loaded segment in the objfile,
990 and assume that <addr> is where that got loaded.
992 We no longer warn if the lowest section is not a text segment (as
993 happens for the PA64 port. */
994 if (addrs && addrs->other[0].name)
995 addr_info_make_relative (addrs, objfile->obfd);
997 /* Initialize symbol reading routines for this objfile, allow complaints to
998 appear for this new file, and record how verbose to be, then do the
999 initial symbol reading for this file. */
1001 (*objfile->sf->sym_init) (objfile);
1002 clear_complaints (&symfile_complaints, 1, add_flags & SYMFILE_VERBOSE);
1005 (*objfile->sf->sym_offsets) (objfile, addrs);
1008 size_t size = SIZEOF_N_SECTION_OFFSETS (num_offsets);
1010 /* Just copy in the offset table directly as given to us. */
1011 objfile->num_sections = num_offsets;
1012 objfile->section_offsets
1013 = ((struct section_offsets *)
1014 obstack_alloc (&objfile->objfile_obstack, size));
1015 memcpy (objfile->section_offsets, offsets, size);
1017 init_objfile_sect_indices (objfile);
1020 read_symbols (objfile, add_flags);
1022 /* Discard cleanups as symbol reading was successful. */
1024 discard_cleanups (old_chain);
1028 /* Perform required actions after either reading in the initial
1029 symbols for a new objfile, or mapping in the symbols from a reusable
1030 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
1033 new_symfile_objfile (struct objfile *objfile, int add_flags)
1035 /* If this is the main symbol file we have to clean up all users of the
1036 old main symbol file. Otherwise it is sufficient to fixup all the
1037 breakpoints that may have been redefined by this symbol file. */
1038 if (add_flags & SYMFILE_MAINLINE)
1040 /* OK, make it the "real" symbol file. */
1041 symfile_objfile = objfile;
1043 clear_symtab_users (add_flags);
1045 else if ((add_flags & SYMFILE_DEFER_BP_RESET) == 0)
1047 breakpoint_re_set ();
1050 /* We're done reading the symbol file; finish off complaints. */
1051 clear_complaints (&symfile_complaints, 0, add_flags & SYMFILE_VERBOSE);
1054 /* Process a symbol file, as either the main file or as a dynamically
1057 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1058 A new reference is acquired by this function.
1060 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1061 extra, such as dynamically loaded code, and what to do with breakpoins.
1063 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
1064 syms_from_objfile, above.
1065 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1067 PARENT is the original objfile if ABFD is a separate debug info file.
1068 Otherwise PARENT is NULL.
1070 Upon success, returns a pointer to the objfile that was added.
1071 Upon failure, jumps back to command level (never returns). */
1073 static struct objfile *
1074 symbol_file_add_with_addrs_or_offsets (bfd *abfd,
1076 struct section_addr_info *addrs,
1077 struct section_offsets *offsets,
1079 int flags, struct objfile *parent)
1081 struct objfile *objfile;
1082 const char *name = bfd_get_filename (abfd);
1083 const int from_tty = add_flags & SYMFILE_VERBOSE;
1084 const int mainline = add_flags & SYMFILE_MAINLINE;
1085 const int should_print = ((from_tty || info_verbose)
1086 && (readnow_symbol_files
1087 || (add_flags & SYMFILE_NO_READ) == 0));
1089 if (readnow_symbol_files)
1091 flags |= OBJF_READNOW;
1092 add_flags &= ~SYMFILE_NO_READ;
1095 /* Give user a chance to burp if we'd be
1096 interactively wiping out any existing symbols. */
1098 if ((have_full_symbols () || have_partial_symbols ())
1101 && !query (_("Load new symbol table from \"%s\"? "), name))
1102 error (_("Not confirmed."));
1104 objfile = allocate_objfile (abfd, flags | (mainline ? OBJF_MAINLINE : 0));
1107 add_separate_debug_objfile (objfile, parent);
1109 /* We either created a new mapped symbol table, mapped an existing
1110 symbol table file which has not had initial symbol reading
1111 performed, or need to read an unmapped symbol table. */
1114 if (deprecated_pre_add_symbol_hook)
1115 deprecated_pre_add_symbol_hook (name);
1118 printf_unfiltered (_("Reading symbols from %s..."), name);
1120 gdb_flush (gdb_stdout);
1123 syms_from_objfile (objfile, addrs, offsets, num_offsets,
1126 /* We now have at least a partial symbol table. Check to see if the
1127 user requested that all symbols be read on initial access via either
1128 the gdb startup command line or on a per symbol file basis. Expand
1129 all partial symbol tables for this objfile if so. */
1131 if ((flags & OBJF_READNOW))
1135 printf_unfiltered (_("expanding to full symbols..."));
1137 gdb_flush (gdb_stdout);
1141 objfile->sf->qf->expand_all_symtabs (objfile);
1144 if (should_print && !objfile_has_symbols (objfile))
1147 printf_unfiltered (_("(no debugging symbols found)..."));
1153 if (deprecated_post_add_symbol_hook)
1154 deprecated_post_add_symbol_hook ();
1156 printf_unfiltered (_("done.\n"));
1159 /* We print some messages regardless of whether 'from_tty ||
1160 info_verbose' is true, so make sure they go out at the right
1162 gdb_flush (gdb_stdout);
1164 if (objfile->sf == NULL)
1166 observer_notify_new_objfile (objfile);
1167 return objfile; /* No symbols. */
1170 new_symfile_objfile (objfile, add_flags);
1172 observer_notify_new_objfile (objfile);
1174 bfd_cache_close_all ();
1178 /* Add BFD as a separate debug file for OBJFILE. */
1181 symbol_file_add_separate (bfd *bfd, int symfile_flags, struct objfile *objfile)
1183 struct objfile *new_objfile;
1184 struct section_addr_info *sap;
1185 struct cleanup *my_cleanup;
1187 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1188 because sections of BFD may not match sections of OBJFILE and because
1189 vma may have been modified by tools such as prelink. */
1190 sap = build_section_addr_info_from_objfile (objfile);
1191 my_cleanup = make_cleanup_free_section_addr_info (sap);
1193 new_objfile = symbol_file_add_with_addrs_or_offsets
1194 (bfd, symfile_flags,
1196 objfile->flags & (OBJF_REORDERED | OBJF_SHARED | OBJF_READNOW
1200 do_cleanups (my_cleanup);
1203 /* Process the symbol file ABFD, as either the main file or as a
1204 dynamically loaded file.
1206 See symbol_file_add_with_addrs_or_offsets's comments for
1209 symbol_file_add_from_bfd (bfd *abfd, int add_flags,
1210 struct section_addr_info *addrs,
1211 int flags, struct objfile *parent)
1213 return symbol_file_add_with_addrs_or_offsets (abfd, add_flags, addrs, 0, 0,
1218 /* Process a symbol file, as either the main file or as a dynamically
1219 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
1222 symbol_file_add (char *name, int add_flags, struct section_addr_info *addrs,
1225 bfd *bfd = symfile_bfd_open (name);
1226 struct cleanup *cleanup = make_cleanup_bfd_unref (bfd);
1227 struct objfile *objf;
1229 objf = symbol_file_add_from_bfd (bfd, add_flags, addrs, flags, NULL);
1230 do_cleanups (cleanup);
1235 /* Call symbol_file_add() with default values and update whatever is
1236 affected by the loading of a new main().
1237 Used when the file is supplied in the gdb command line
1238 and by some targets with special loading requirements.
1239 The auxiliary function, symbol_file_add_main_1(), has the flags
1240 argument for the switches that can only be specified in the symbol_file
1244 symbol_file_add_main (char *args, int from_tty)
1246 symbol_file_add_main_1 (args, from_tty, 0);
1250 symbol_file_add_main_1 (char *args, int from_tty, int flags)
1252 const int add_flags = (current_inferior ()->symfile_flags
1253 | SYMFILE_MAINLINE | (from_tty ? SYMFILE_VERBOSE : 0));
1255 symbol_file_add (args, add_flags, NULL, flags);
1257 /* Getting new symbols may change our opinion about
1258 what is frameless. */
1259 reinit_frame_cache ();
1261 if ((flags & SYMFILE_NO_READ) == 0)
1262 set_initial_language ();
1266 symbol_file_clear (int from_tty)
1268 if ((have_full_symbols () || have_partial_symbols ())
1271 ? !query (_("Discard symbol table from `%s'? "),
1272 symfile_objfile->name)
1273 : !query (_("Discard symbol table? "))))
1274 error (_("Not confirmed."));
1276 /* solib descriptors may have handles to objfiles. Wipe them before their
1277 objfiles get stale by free_all_objfiles. */
1278 no_shared_libraries (NULL, from_tty);
1280 free_all_objfiles ();
1282 gdb_assert (symfile_objfile == NULL);
1284 printf_unfiltered (_("No symbol file now.\n"));
1288 get_debug_link_info (struct objfile *objfile, unsigned long *crc32_out)
1291 bfd_size_type debuglink_size;
1292 unsigned long crc32;
1296 sect = bfd_get_section_by_name (objfile->obfd, ".gnu_debuglink");
1301 debuglink_size = bfd_section_size (objfile->obfd, sect);
1303 contents = xmalloc (debuglink_size);
1304 bfd_get_section_contents (objfile->obfd, sect, contents,
1305 (file_ptr)0, (bfd_size_type)debuglink_size);
1307 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1308 crc_offset = strlen (contents) + 1;
1309 crc_offset = (crc_offset + 3) & ~3;
1311 crc32 = bfd_get_32 (objfile->obfd, (bfd_byte *) (contents + crc_offset));
1317 /* Return 32-bit CRC for ABFD. If successful store it to *FILE_CRC_RETURN and
1318 return 1. Otherwise print a warning and return 0. ABFD seek position is
1322 get_file_crc (bfd *abfd, unsigned long *file_crc_return)
1324 unsigned long file_crc = 0;
1326 if (bfd_seek (abfd, 0, SEEK_SET) != 0)
1328 warning (_("Problem reading \"%s\" for CRC: %s"),
1329 bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
1335 gdb_byte buffer[8 * 1024];
1336 bfd_size_type count;
1338 count = bfd_bread (buffer, sizeof (buffer), abfd);
1339 if (count == (bfd_size_type) -1)
1341 warning (_("Problem reading \"%s\" for CRC: %s"),
1342 bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
1347 file_crc = gnu_debuglink_crc32 (file_crc, buffer, count);
1350 *file_crc_return = file_crc;
1355 separate_debug_file_exists (const char *name, unsigned long crc,
1356 struct objfile *parent_objfile)
1358 unsigned long file_crc;
1361 struct stat parent_stat, abfd_stat;
1362 int verified_as_different;
1364 /* Find a separate debug info file as if symbols would be present in
1365 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1366 section can contain just the basename of PARENT_OBJFILE without any
1367 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1368 the separate debug infos with the same basename can exist. */
1370 if (filename_cmp (name, parent_objfile->name) == 0)
1373 abfd = gdb_bfd_open_maybe_remote (name);
1378 /* Verify symlinks were not the cause of filename_cmp name difference above.
1380 Some operating systems, e.g. Windows, do not provide a meaningful
1381 st_ino; they always set it to zero. (Windows does provide a
1382 meaningful st_dev.) Do not indicate a duplicate library in that
1383 case. While there is no guarantee that a system that provides
1384 meaningful inode numbers will never set st_ino to zero, this is
1385 merely an optimization, so we do not need to worry about false
1388 if (bfd_stat (abfd, &abfd_stat) == 0
1389 && abfd_stat.st_ino != 0
1390 && bfd_stat (parent_objfile->obfd, &parent_stat) == 0)
1392 if (abfd_stat.st_dev == parent_stat.st_dev
1393 && abfd_stat.st_ino == parent_stat.st_ino)
1395 gdb_bfd_unref (abfd);
1398 verified_as_different = 1;
1401 verified_as_different = 0;
1403 file_crc_p = get_file_crc (abfd, &file_crc);
1405 gdb_bfd_unref (abfd);
1410 if (crc != file_crc)
1412 /* If one (or both) the files are accessed for example the via "remote:"
1413 gdbserver way it does not support the bfd_stat operation. Verify
1414 whether those two files are not the same manually. */
1416 if (!verified_as_different && !parent_objfile->crc32_p)
1418 parent_objfile->crc32_p = get_file_crc (parent_objfile->obfd,
1419 &parent_objfile->crc32);
1420 if (!parent_objfile->crc32_p)
1424 if (verified_as_different || parent_objfile->crc32 != file_crc)
1425 warning (_("the debug information found in \"%s\""
1426 " does not match \"%s\" (CRC mismatch).\n"),
1427 name, parent_objfile->name);
1435 char *debug_file_directory = NULL;
1437 show_debug_file_directory (struct ui_file *file, int from_tty,
1438 struct cmd_list_element *c, const char *value)
1440 fprintf_filtered (file,
1441 _("The directory where separate debug "
1442 "symbols are searched for is \"%s\".\n"),
1446 #if ! defined (DEBUG_SUBDIRECTORY)
1447 #define DEBUG_SUBDIRECTORY ".debug"
1450 /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
1451 where the original file resides (may not be the same as
1452 dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are
1453 looking for. Returns the name of the debuginfo, of NULL. */
1456 find_separate_debug_file (const char *dir,
1457 const char *canon_dir,
1458 const char *debuglink,
1459 unsigned long crc32, struct objfile *objfile)
1464 VEC (char_ptr) *debugdir_vec;
1465 struct cleanup *back_to;
1468 /* Set I to max (strlen (canon_dir), strlen (dir)). */
1470 if (canon_dir != NULL && strlen (canon_dir) > i)
1471 i = strlen (canon_dir);
1473 debugfile = xmalloc (strlen (debug_file_directory) + 1
1475 + strlen (DEBUG_SUBDIRECTORY)
1477 + strlen (debuglink)
1480 /* First try in the same directory as the original file. */
1481 strcpy (debugfile, dir);
1482 strcat (debugfile, debuglink);
1484 if (separate_debug_file_exists (debugfile, crc32, objfile))
1487 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1488 strcpy (debugfile, dir);
1489 strcat (debugfile, DEBUG_SUBDIRECTORY);
1490 strcat (debugfile, "/");
1491 strcat (debugfile, debuglink);
1493 if (separate_debug_file_exists (debugfile, crc32, objfile))
1496 /* Then try in the global debugfile directories.
1498 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1499 cause "/..." lookups. */
1501 debugdir_vec = dirnames_to_char_ptr_vec (debug_file_directory);
1502 back_to = make_cleanup_free_char_ptr_vec (debugdir_vec);
1504 for (ix = 0; VEC_iterate (char_ptr, debugdir_vec, ix, debugdir); ++ix)
1506 strcpy (debugfile, debugdir);
1507 strcat (debugfile, "/");
1508 strcat (debugfile, dir);
1509 strcat (debugfile, debuglink);
1511 if (separate_debug_file_exists (debugfile, crc32, objfile))
1514 /* If the file is in the sysroot, try using its base path in the
1515 global debugfile directory. */
1516 if (canon_dir != NULL
1517 && filename_ncmp (canon_dir, gdb_sysroot,
1518 strlen (gdb_sysroot)) == 0
1519 && IS_DIR_SEPARATOR (canon_dir[strlen (gdb_sysroot)]))
1521 strcpy (debugfile, debugdir);
1522 strcat (debugfile, canon_dir + strlen (gdb_sysroot));
1523 strcat (debugfile, "/");
1524 strcat (debugfile, debuglink);
1526 if (separate_debug_file_exists (debugfile, crc32, objfile))
1531 do_cleanups (back_to);
1536 /* Modify PATH to contain only "directory/" part of PATH.
1537 If there were no directory separators in PATH, PATH will be empty
1538 string on return. */
1541 terminate_after_last_dir_separator (char *path)
1545 /* Strip off the final filename part, leaving the directory name,
1546 followed by a slash. The directory can be relative or absolute. */
1547 for (i = strlen(path) - 1; i >= 0; i--)
1548 if (IS_DIR_SEPARATOR (path[i]))
1551 /* If I is -1 then no directory is present there and DIR will be "". */
1555 /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section).
1556 Returns pathname, or NULL. */
1559 find_separate_debug_file_by_debuglink (struct objfile *objfile)
1562 char *dir, *canon_dir;
1564 unsigned long crc32;
1565 struct cleanup *cleanups;
1567 debuglink = get_debug_link_info (objfile, &crc32);
1569 if (debuglink == NULL)
1571 /* There's no separate debug info, hence there's no way we could
1572 load it => no warning. */
1576 cleanups = make_cleanup (xfree, debuglink);
1577 dir = xstrdup (objfile->name);
1578 make_cleanup (xfree, dir);
1579 terminate_after_last_dir_separator (dir);
1580 canon_dir = lrealpath (dir);
1582 debugfile = find_separate_debug_file (dir, canon_dir, debuglink,
1586 if (debugfile == NULL)
1589 /* For PR gdb/9538, try again with realpath (if different from the
1594 if (lstat (objfile->name, &st_buf) == 0 && S_ISLNK(st_buf.st_mode))
1598 symlink_dir = lrealpath (objfile->name);
1599 if (symlink_dir != NULL)
1601 make_cleanup (xfree, symlink_dir);
1602 terminate_after_last_dir_separator (symlink_dir);
1603 if (strcmp (dir, symlink_dir) != 0)
1605 /* Different directory, so try using it. */
1606 debugfile = find_separate_debug_file (symlink_dir,
1614 #endif /* HAVE_LSTAT */
1617 do_cleanups (cleanups);
1622 /* This is the symbol-file command. Read the file, analyze its
1623 symbols, and add a struct symtab to a symtab list. The syntax of
1624 the command is rather bizarre:
1626 1. The function buildargv implements various quoting conventions
1627 which are undocumented and have little or nothing in common with
1628 the way things are quoted (or not quoted) elsewhere in GDB.
1630 2. Options are used, which are not generally used in GDB (perhaps
1631 "set mapped on", "set readnow on" would be better)
1633 3. The order of options matters, which is contrary to GNU
1634 conventions (because it is confusing and inconvenient). */
1637 symbol_file_command (char *args, int from_tty)
1643 symbol_file_clear (from_tty);
1647 char **argv = gdb_buildargv (args);
1648 int flags = OBJF_USERLOADED;
1649 struct cleanup *cleanups;
1652 cleanups = make_cleanup_freeargv (argv);
1653 while (*argv != NULL)
1655 if (strcmp (*argv, "-readnow") == 0)
1656 flags |= OBJF_READNOW;
1657 else if (**argv == '-')
1658 error (_("unknown option `%s'"), *argv);
1661 symbol_file_add_main_1 (*argv, from_tty, flags);
1669 error (_("no symbol file name was specified"));
1671 do_cleanups (cleanups);
1675 /* Set the initial language.
1677 FIXME: A better solution would be to record the language in the
1678 psymtab when reading partial symbols, and then use it (if known) to
1679 set the language. This would be a win for formats that encode the
1680 language in an easily discoverable place, such as DWARF. For
1681 stabs, we can jump through hoops looking for specially named
1682 symbols or try to intuit the language from the specific type of
1683 stabs we find, but we can't do that until later when we read in
1687 set_initial_language (void)
1689 enum language lang = language_unknown;
1691 if (language_of_main != language_unknown)
1692 lang = language_of_main;
1695 const char *filename;
1697 filename = find_main_filename ();
1698 if (filename != NULL)
1699 lang = deduce_language_from_filename (filename);
1702 if (lang == language_unknown)
1704 /* Make C the default language */
1708 set_language (lang);
1709 expected_language = current_language; /* Don't warn the user. */
1712 /* If NAME is a remote name open the file using remote protocol, otherwise
1713 open it normally. Returns a new reference to the BFD. On error,
1714 returns NULL with the BFD error set. */
1717 gdb_bfd_open_maybe_remote (const char *name)
1721 if (remote_filename_p (name))
1722 result = remote_bfd_open (name, gnutarget);
1724 result = gdb_bfd_open (name, gnutarget, -1);
1730 /* Open the file specified by NAME and hand it off to BFD for
1731 preliminary analysis. Return a newly initialized bfd *, which
1732 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1733 absolute). In case of trouble, error() is called. */
1736 symfile_bfd_open (char *name)
1740 char *absolute_name;
1742 if (remote_filename_p (name))
1744 sym_bfd = remote_bfd_open (name, gnutarget);
1746 error (_("`%s': can't open to read symbols: %s."), name,
1747 bfd_errmsg (bfd_get_error ()));
1749 if (!bfd_check_format (sym_bfd, bfd_object))
1751 make_cleanup_bfd_unref (sym_bfd);
1752 error (_("`%s': can't read symbols: %s."), name,
1753 bfd_errmsg (bfd_get_error ()));
1759 name = tilde_expand (name); /* Returns 1st new malloc'd copy. */
1761 /* Look down path for it, allocate 2nd new malloc'd copy. */
1762 desc = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, name,
1763 O_RDONLY | O_BINARY, &absolute_name);
1764 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1767 char *exename = alloca (strlen (name) + 5);
1769 strcat (strcpy (exename, name), ".exe");
1770 desc = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, exename,
1771 O_RDONLY | O_BINARY, &absolute_name);
1776 make_cleanup (xfree, name);
1777 perror_with_name (name);
1781 name = absolute_name;
1782 make_cleanup (xfree, name);
1784 sym_bfd = gdb_bfd_open (name, gnutarget, desc);
1787 make_cleanup (xfree, name);
1788 error (_("`%s': can't open to read symbols: %s."), name,
1789 bfd_errmsg (bfd_get_error ()));
1791 bfd_set_cacheable (sym_bfd, 1);
1793 if (!bfd_check_format (sym_bfd, bfd_object))
1795 make_cleanup_bfd_unref (sym_bfd);
1796 error (_("`%s': can't read symbols: %s."), name,
1797 bfd_errmsg (bfd_get_error ()));
1803 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1804 the section was not found. */
1807 get_section_index (struct objfile *objfile, char *section_name)
1809 asection *sect = bfd_get_section_by_name (objfile->obfd, section_name);
1817 /* Link SF into the global symtab_fns list. Called on startup by the
1818 _initialize routine in each object file format reader, to register
1819 information about each format the reader is prepared to handle. */
1822 add_symtab_fns (const struct sym_fns *sf)
1824 VEC_safe_push (sym_fns_ptr, symtab_fns, sf);
1827 /* Initialize OBJFILE to read symbols from its associated BFD. It
1828 either returns or calls error(). The result is an initialized
1829 struct sym_fns in the objfile structure, that contains cached
1830 information about the symbol file. */
1832 static const struct sym_fns *
1833 find_sym_fns (bfd *abfd)
1835 const struct sym_fns *sf;
1836 enum bfd_flavour our_flavour = bfd_get_flavour (abfd);
1839 if (our_flavour == bfd_target_srec_flavour
1840 || our_flavour == bfd_target_ihex_flavour
1841 || our_flavour == bfd_target_tekhex_flavour)
1842 return NULL; /* No symbols. */
1844 for (i = 0; VEC_iterate (sym_fns_ptr, symtab_fns, i, sf); ++i)
1845 if (our_flavour == sf->sym_flavour)
1848 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1849 bfd_get_target (abfd));
1853 /* This function runs the load command of our current target. */
1856 load_command (char *arg, int from_tty)
1860 /* The user might be reloading because the binary has changed. Take
1861 this opportunity to check. */
1862 reopen_exec_file ();
1870 parg = arg = get_exec_file (1);
1872 /* Count how many \ " ' tab space there are in the name. */
1873 while ((parg = strpbrk (parg, "\\\"'\t ")))
1881 /* We need to quote this string so buildargv can pull it apart. */
1882 char *temp = xmalloc (strlen (arg) + count + 1 );
1886 make_cleanup (xfree, temp);
1889 while ((parg = strpbrk (parg, "\\\"'\t ")))
1891 strncpy (ptemp, prev, parg - prev);
1892 ptemp += parg - prev;
1896 strcpy (ptemp, prev);
1902 target_load (arg, from_tty);
1904 /* After re-loading the executable, we don't really know which
1905 overlays are mapped any more. */
1906 overlay_cache_invalid = 1;
1909 /* This version of "load" should be usable for any target. Currently
1910 it is just used for remote targets, not inftarg.c or core files,
1911 on the theory that only in that case is it useful.
1913 Avoiding xmodem and the like seems like a win (a) because we don't have
1914 to worry about finding it, and (b) On VMS, fork() is very slow and so
1915 we don't want to run a subprocess. On the other hand, I'm not sure how
1916 performance compares. */
1918 static int validate_download = 0;
1920 /* Callback service function for generic_load (bfd_map_over_sections). */
1923 add_section_size_callback (bfd *abfd, asection *asec, void *data)
1925 bfd_size_type *sum = data;
1927 *sum += bfd_get_section_size (asec);
1930 /* Opaque data for load_section_callback. */
1931 struct load_section_data {
1932 unsigned long load_offset;
1933 struct load_progress_data *progress_data;
1934 VEC(memory_write_request_s) *requests;
1937 /* Opaque data for load_progress. */
1938 struct load_progress_data {
1939 /* Cumulative data. */
1940 unsigned long write_count;
1941 unsigned long data_count;
1942 bfd_size_type total_size;
1945 /* Opaque data for load_progress for a single section. */
1946 struct load_progress_section_data {
1947 struct load_progress_data *cumulative;
1949 /* Per-section data. */
1950 const char *section_name;
1951 ULONGEST section_sent;
1952 ULONGEST section_size;
1957 /* Target write callback routine for progress reporting. */
1960 load_progress (ULONGEST bytes, void *untyped_arg)
1962 struct load_progress_section_data *args = untyped_arg;
1963 struct load_progress_data *totals;
1966 /* Writing padding data. No easy way to get at the cumulative
1967 stats, so just ignore this. */
1970 totals = args->cumulative;
1972 if (bytes == 0 && args->section_sent == 0)
1974 /* The write is just starting. Let the user know we've started
1976 ui_out_message (current_uiout, 0, "Loading section %s, size %s lma %s\n",
1977 args->section_name, hex_string (args->section_size),
1978 paddress (target_gdbarch (), args->lma));
1982 if (validate_download)
1984 /* Broken memories and broken monitors manifest themselves here
1985 when bring new computers to life. This doubles already slow
1987 /* NOTE: cagney/1999-10-18: A more efficient implementation
1988 might add a verify_memory() method to the target vector and
1989 then use that. remote.c could implement that method using
1990 the ``qCRC'' packet. */
1991 gdb_byte *check = xmalloc (bytes);
1992 struct cleanup *verify_cleanups = make_cleanup (xfree, check);
1994 if (target_read_memory (args->lma, check, bytes) != 0)
1995 error (_("Download verify read failed at %s"),
1996 paddress (target_gdbarch (), args->lma));
1997 if (memcmp (args->buffer, check, bytes) != 0)
1998 error (_("Download verify compare failed at %s"),
1999 paddress (target_gdbarch (), args->lma));
2000 do_cleanups (verify_cleanups);
2002 totals->data_count += bytes;
2004 args->buffer += bytes;
2005 totals->write_count += 1;
2006 args->section_sent += bytes;
2007 if (check_quit_flag ()
2008 || (deprecated_ui_load_progress_hook != NULL
2009 && deprecated_ui_load_progress_hook (args->section_name,
2010 args->section_sent)))
2011 error (_("Canceled the download"));
2013 if (deprecated_show_load_progress != NULL)
2014 deprecated_show_load_progress (args->section_name,
2018 totals->total_size);
2021 /* Callback service function for generic_load (bfd_map_over_sections). */
2024 load_section_callback (bfd *abfd, asection *asec, void *data)
2026 struct memory_write_request *new_request;
2027 struct load_section_data *args = data;
2028 struct load_progress_section_data *section_data;
2029 bfd_size_type size = bfd_get_section_size (asec);
2031 const char *sect_name = bfd_get_section_name (abfd, asec);
2033 if ((bfd_get_section_flags (abfd, asec) & SEC_LOAD) == 0)
2039 new_request = VEC_safe_push (memory_write_request_s,
2040 args->requests, NULL);
2041 memset (new_request, 0, sizeof (struct memory_write_request));
2042 section_data = xcalloc (1, sizeof (struct load_progress_section_data));
2043 new_request->begin = bfd_section_lma (abfd, asec) + args->load_offset;
2044 new_request->end = new_request->begin + size; /* FIXME Should size
2046 new_request->data = xmalloc (size);
2047 new_request->baton = section_data;
2049 buffer = new_request->data;
2051 section_data->cumulative = args->progress_data;
2052 section_data->section_name = sect_name;
2053 section_data->section_size = size;
2054 section_data->lma = new_request->begin;
2055 section_data->buffer = buffer;
2057 bfd_get_section_contents (abfd, asec, buffer, 0, size);
2060 /* Clean up an entire memory request vector, including load
2061 data and progress records. */
2064 clear_memory_write_data (void *arg)
2066 VEC(memory_write_request_s) **vec_p = arg;
2067 VEC(memory_write_request_s) *vec = *vec_p;
2069 struct memory_write_request *mr;
2071 for (i = 0; VEC_iterate (memory_write_request_s, vec, i, mr); ++i)
2076 VEC_free (memory_write_request_s, vec);
2080 generic_load (char *args, int from_tty)
2083 struct timeval start_time, end_time;
2085 struct cleanup *old_cleanups = make_cleanup (null_cleanup, 0);
2086 struct load_section_data cbdata;
2087 struct load_progress_data total_progress;
2088 struct ui_out *uiout = current_uiout;
2093 memset (&cbdata, 0, sizeof (cbdata));
2094 memset (&total_progress, 0, sizeof (total_progress));
2095 cbdata.progress_data = &total_progress;
2097 make_cleanup (clear_memory_write_data, &cbdata.requests);
2100 error_no_arg (_("file to load"));
2102 argv = gdb_buildargv (args);
2103 make_cleanup_freeargv (argv);
2105 filename = tilde_expand (argv[0]);
2106 make_cleanup (xfree, filename);
2108 if (argv[1] != NULL)
2112 cbdata.load_offset = strtoul (argv[1], &endptr, 0);
2114 /* If the last word was not a valid number then
2115 treat it as a file name with spaces in. */
2116 if (argv[1] == endptr)
2117 error (_("Invalid download offset:%s."), argv[1]);
2119 if (argv[2] != NULL)
2120 error (_("Too many parameters."));
2123 /* Open the file for loading. */
2124 loadfile_bfd = gdb_bfd_open (filename, gnutarget, -1);
2125 if (loadfile_bfd == NULL)
2127 perror_with_name (filename);
2131 make_cleanup_bfd_unref (loadfile_bfd);
2133 if (!bfd_check_format (loadfile_bfd, bfd_object))
2135 error (_("\"%s\" is not an object file: %s"), filename,
2136 bfd_errmsg (bfd_get_error ()));
2139 bfd_map_over_sections (loadfile_bfd, add_section_size_callback,
2140 (void *) &total_progress.total_size);
2142 bfd_map_over_sections (loadfile_bfd, load_section_callback, &cbdata);
2144 gettimeofday (&start_time, NULL);
2146 if (target_write_memory_blocks (cbdata.requests, flash_discard,
2147 load_progress) != 0)
2148 error (_("Load failed"));
2150 gettimeofday (&end_time, NULL);
2152 entry = bfd_get_start_address (loadfile_bfd);
2153 ui_out_text (uiout, "Start address ");
2154 ui_out_field_fmt (uiout, "address", "%s", paddress (target_gdbarch (), entry));
2155 ui_out_text (uiout, ", load size ");
2156 ui_out_field_fmt (uiout, "load-size", "%lu", total_progress.data_count);
2157 ui_out_text (uiout, "\n");
2158 /* We were doing this in remote-mips.c, I suspect it is right
2159 for other targets too. */
2160 regcache_write_pc (get_current_regcache (), entry);
2162 /* Reset breakpoints, now that we have changed the load image. For
2163 instance, breakpoints may have been set (or reset, by
2164 post_create_inferior) while connected to the target but before we
2165 loaded the program. In that case, the prologue analyzer could
2166 have read instructions from the target to find the right
2167 breakpoint locations. Loading has changed the contents of that
2170 breakpoint_re_set ();
2172 /* FIXME: are we supposed to call symbol_file_add or not? According
2173 to a comment from remote-mips.c (where a call to symbol_file_add
2174 was commented out), making the call confuses GDB if more than one
2175 file is loaded in. Some targets do (e.g., remote-vx.c) but
2176 others don't (or didn't - perhaps they have all been deleted). */
2178 print_transfer_performance (gdb_stdout, total_progress.data_count,
2179 total_progress.write_count,
2180 &start_time, &end_time);
2182 do_cleanups (old_cleanups);
2185 /* Report how fast the transfer went. */
2187 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
2188 replaced by print_transfer_performance (with a very different
2189 function signature). */
2192 report_transfer_performance (unsigned long data_count, time_t start_time,
2195 struct timeval start, end;
2197 start.tv_sec = start_time;
2199 end.tv_sec = end_time;
2202 print_transfer_performance (gdb_stdout, data_count, 0, &start, &end);
2206 print_transfer_performance (struct ui_file *stream,
2207 unsigned long data_count,
2208 unsigned long write_count,
2209 const struct timeval *start_time,
2210 const struct timeval *end_time)
2212 ULONGEST time_count;
2213 struct ui_out *uiout = current_uiout;
2215 /* Compute the elapsed time in milliseconds, as a tradeoff between
2216 accuracy and overflow. */
2217 time_count = (end_time->tv_sec - start_time->tv_sec) * 1000;
2218 time_count += (end_time->tv_usec - start_time->tv_usec) / 1000;
2220 ui_out_text (uiout, "Transfer rate: ");
2223 unsigned long rate = ((ULONGEST) data_count * 1000) / time_count;
2225 if (ui_out_is_mi_like_p (uiout))
2227 ui_out_field_fmt (uiout, "transfer-rate", "%lu", rate * 8);
2228 ui_out_text (uiout, " bits/sec");
2230 else if (rate < 1024)
2232 ui_out_field_fmt (uiout, "transfer-rate", "%lu", rate);
2233 ui_out_text (uiout, " bytes/sec");
2237 ui_out_field_fmt (uiout, "transfer-rate", "%lu", rate / 1024);
2238 ui_out_text (uiout, " KB/sec");
2243 ui_out_field_fmt (uiout, "transferred-bits", "%lu", (data_count * 8));
2244 ui_out_text (uiout, " bits in <1 sec");
2246 if (write_count > 0)
2248 ui_out_text (uiout, ", ");
2249 ui_out_field_fmt (uiout, "write-rate", "%lu", data_count / write_count);
2250 ui_out_text (uiout, " bytes/write");
2252 ui_out_text (uiout, ".\n");
2255 /* This function allows the addition of incrementally linked object files.
2256 It does not modify any state in the target, only in the debugger. */
2257 /* Note: ezannoni 2000-04-13 This function/command used to have a
2258 special case syntax for the rombug target (Rombug is the boot
2259 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2260 rombug case, the user doesn't need to supply a text address,
2261 instead a call to target_link() (in target.c) would supply the
2262 value to use. We are now discontinuing this type of ad hoc syntax. */
2265 add_symbol_file_command (char *args, int from_tty)
2267 struct gdbarch *gdbarch = get_current_arch ();
2268 char *filename = NULL;
2269 int flags = OBJF_USERLOADED;
2271 int section_index = 0;
2275 int expecting_sec_name = 0;
2276 int expecting_sec_addr = 0;
2285 struct section_addr_info *section_addrs;
2286 struct sect_opt *sect_opts = NULL;
2287 size_t num_sect_opts = 0;
2288 struct cleanup *my_cleanups = make_cleanup (null_cleanup, NULL);
2291 sect_opts = (struct sect_opt *) xmalloc (num_sect_opts
2292 * sizeof (struct sect_opt));
2297 error (_("add-symbol-file takes a file name and an address"));
2299 argv = gdb_buildargv (args);
2300 make_cleanup_freeargv (argv);
2302 for (arg = argv[0], argcnt = 0; arg != NULL; arg = argv[++argcnt])
2304 /* Process the argument. */
2307 /* The first argument is the file name. */
2308 filename = tilde_expand (arg);
2309 make_cleanup (xfree, filename);
2314 /* The second argument is always the text address at which
2315 to load the program. */
2316 sect_opts[section_index].name = ".text";
2317 sect_opts[section_index].value = arg;
2318 if (++section_index >= num_sect_opts)
2321 sect_opts = ((struct sect_opt *)
2322 xrealloc (sect_opts,
2324 * sizeof (struct sect_opt)));
2329 /* It's an option (starting with '-') or it's an argument
2334 if (strcmp (arg, "-readnow") == 0)
2335 flags |= OBJF_READNOW;
2336 else if (strcmp (arg, "-s") == 0)
2338 expecting_sec_name = 1;
2339 expecting_sec_addr = 1;
2344 if (expecting_sec_name)
2346 sect_opts[section_index].name = arg;
2347 expecting_sec_name = 0;
2350 if (expecting_sec_addr)
2352 sect_opts[section_index].value = arg;
2353 expecting_sec_addr = 0;
2354 if (++section_index >= num_sect_opts)
2357 sect_opts = ((struct sect_opt *)
2358 xrealloc (sect_opts,
2360 * sizeof (struct sect_opt)));
2364 error (_("USAGE: add-symbol-file <filename> <textaddress>"
2365 " [-readnow] [-s <secname> <addr>]*"));
2370 /* This command takes at least two arguments. The first one is a
2371 filename, and the second is the address where this file has been
2372 loaded. Abort now if this address hasn't been provided by the
2374 if (section_index < 1)
2375 error (_("The address where %s has been loaded is missing"), filename);
2377 /* Print the prompt for the query below. And save the arguments into
2378 a sect_addr_info structure to be passed around to other
2379 functions. We have to split this up into separate print
2380 statements because hex_string returns a local static
2383 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename);
2384 section_addrs = alloc_section_addr_info (section_index);
2385 make_cleanup (xfree, section_addrs);
2386 for (i = 0; i < section_index; i++)
2389 char *val = sect_opts[i].value;
2390 char *sec = sect_opts[i].name;
2392 addr = parse_and_eval_address (val);
2394 /* Here we store the section offsets in the order they were
2395 entered on the command line. */
2396 section_addrs->other[sec_num].name = sec;
2397 section_addrs->other[sec_num].addr = addr;
2398 printf_unfiltered ("\t%s_addr = %s\n", sec,
2399 paddress (gdbarch, addr));
2402 /* The object's sections are initialized when a
2403 call is made to build_objfile_section_table (objfile).
2404 This happens in reread_symbols.
2405 At this point, we don't know what file type this is,
2406 so we can't determine what section names are valid. */
2409 if (from_tty && (!query ("%s", "")))
2410 error (_("Not confirmed."));
2412 symbol_file_add (filename, from_tty ? SYMFILE_VERBOSE : 0,
2413 section_addrs, flags);
2415 /* Getting new symbols may change our opinion about what is
2417 reinit_frame_cache ();
2418 do_cleanups (my_cleanups);
2422 typedef struct objfile *objfilep;
2424 DEF_VEC_P (objfilep);
2426 /* Re-read symbols if a symbol-file has changed. */
2428 reread_symbols (void)
2430 struct objfile *objfile;
2432 struct stat new_statbuf;
2434 VEC (objfilep) *new_objfiles = NULL;
2435 struct cleanup *all_cleanups;
2437 all_cleanups = make_cleanup (VEC_cleanup (objfilep), &new_objfiles);
2439 /* With the addition of shared libraries, this should be modified,
2440 the load time should be saved in the partial symbol tables, since
2441 different tables may come from different source files. FIXME.
2442 This routine should then walk down each partial symbol table
2443 and see if the symbol table that it originates from has been changed. */
2445 for (objfile = object_files; objfile; objfile = objfile->next)
2447 /* solib-sunos.c creates one objfile with obfd. */
2448 if (objfile->obfd == NULL)
2451 /* Separate debug objfiles are handled in the main objfile. */
2452 if (objfile->separate_debug_objfile_backlink)
2455 /* If this object is from an archive (what you usually create with
2456 `ar', often called a `static library' on most systems, though
2457 a `shared library' on AIX is also an archive), then you should
2458 stat on the archive name, not member name. */
2459 if (objfile->obfd->my_archive)
2460 res = stat (objfile->obfd->my_archive->filename, &new_statbuf);
2462 res = stat (objfile->name, &new_statbuf);
2465 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2466 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2470 new_modtime = new_statbuf.st_mtime;
2471 if (new_modtime != objfile->mtime)
2473 struct cleanup *old_cleanups;
2474 struct section_offsets *offsets;
2476 char *obfd_filename;
2478 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2481 /* There are various functions like symbol_file_add,
2482 symfile_bfd_open, syms_from_objfile, etc., which might
2483 appear to do what we want. But they have various other
2484 effects which we *don't* want. So we just do stuff
2485 ourselves. We don't worry about mapped files (for one thing,
2486 any mapped file will be out of date). */
2488 /* If we get an error, blow away this objfile (not sure if
2489 that is the correct response for things like shared
2491 old_cleanups = make_cleanup_free_objfile (objfile);
2492 /* We need to do this whenever any symbols go away. */
2493 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
2495 if (exec_bfd != NULL
2496 && filename_cmp (bfd_get_filename (objfile->obfd),
2497 bfd_get_filename (exec_bfd)) == 0)
2499 /* Reload EXEC_BFD without asking anything. */
2501 exec_file_attach (bfd_get_filename (objfile->obfd), 0);
2504 /* Keep the calls order approx. the same as in free_objfile. */
2506 /* Free the separate debug objfiles. It will be
2507 automatically recreated by sym_read. */
2508 free_objfile_separate_debug (objfile);
2510 /* Remove any references to this objfile in the global
2512 preserve_values (objfile);
2514 /* Nuke all the state that we will re-read. Much of the following
2515 code which sets things to NULL really is necessary to tell
2516 other parts of GDB that there is nothing currently there.
2518 Try to keep the freeing order compatible with free_objfile. */
2520 if (objfile->sf != NULL)
2522 (*objfile->sf->sym_finish) (objfile);
2525 clear_objfile_data (objfile);
2527 /* Clean up any state BFD has sitting around. */
2529 struct bfd *obfd = objfile->obfd;
2531 obfd_filename = bfd_get_filename (objfile->obfd);
2532 /* Open the new BFD before freeing the old one, so that
2533 the filename remains live. */
2534 objfile->obfd = gdb_bfd_open_maybe_remote (obfd_filename);
2535 if (objfile->obfd == NULL)
2537 /* We have to make a cleanup and error here, rather
2538 than erroring later, because once we unref OBFD,
2539 OBFD_FILENAME will be freed. */
2540 make_cleanup_bfd_unref (obfd);
2541 error (_("Can't open %s to read symbols."), obfd_filename);
2543 gdb_bfd_unref (obfd);
2546 objfile->name = bfd_get_filename (objfile->obfd);
2547 /* bfd_openr sets cacheable to true, which is what we want. */
2548 if (!bfd_check_format (objfile->obfd, bfd_object))
2549 error (_("Can't read symbols from %s: %s."), objfile->name,
2550 bfd_errmsg (bfd_get_error ()));
2552 /* Save the offsets, we will nuke them with the rest of the
2554 num_offsets = objfile->num_sections;
2555 offsets = ((struct section_offsets *)
2556 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets)));
2557 memcpy (offsets, objfile->section_offsets,
2558 SIZEOF_N_SECTION_OFFSETS (num_offsets));
2560 /* FIXME: Do we have to free a whole linked list, or is this
2562 if (objfile->global_psymbols.list)
2563 xfree (objfile->global_psymbols.list);
2564 memset (&objfile->global_psymbols, 0,
2565 sizeof (objfile->global_psymbols));
2566 if (objfile->static_psymbols.list)
2567 xfree (objfile->static_psymbols.list);
2568 memset (&objfile->static_psymbols, 0,
2569 sizeof (objfile->static_psymbols));
2571 /* Free the obstacks for non-reusable objfiles. */
2572 psymbol_bcache_free (objfile->psymbol_cache);
2573 objfile->psymbol_cache = psymbol_bcache_init ();
2574 if (objfile->demangled_names_hash != NULL)
2576 htab_delete (objfile->demangled_names_hash);
2577 objfile->demangled_names_hash = NULL;
2579 obstack_free (&objfile->objfile_obstack, 0);
2580 objfile->sections = NULL;
2581 objfile->symtabs = NULL;
2582 objfile->psymtabs = NULL;
2583 objfile->psymtabs_addrmap = NULL;
2584 objfile->free_psymtabs = NULL;
2585 objfile->template_symbols = NULL;
2586 objfile->msymbols = NULL;
2587 objfile->deprecated_sym_private = 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));
2594 set_objfile_per_bfd (objfile);
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 build_objfile_section_table (objfile);
2601 terminate_minimal_symbol_table (objfile);
2603 /* We use the same section offsets as from last time. I'm not
2604 sure whether that is always correct for shared libraries. */
2605 objfile->section_offsets = (struct section_offsets *)
2606 obstack_alloc (&objfile->objfile_obstack,
2607 SIZEOF_N_SECTION_OFFSETS (num_offsets));
2608 memcpy (objfile->section_offsets, offsets,
2609 SIZEOF_N_SECTION_OFFSETS (num_offsets));
2610 objfile->num_sections = num_offsets;
2612 /* What the hell is sym_new_init for, anyway? The concept of
2613 distinguishing between the main file and additional files
2614 in this way seems rather dubious. */
2615 if (objfile == symfile_objfile)
2617 (*objfile->sf->sym_new_init) (objfile);
2620 (*objfile->sf->sym_init) (objfile);
2621 clear_complaints (&symfile_complaints, 1, 1);
2623 objfile->flags &= ~OBJF_PSYMTABS_READ;
2624 read_symbols (objfile, 0);
2626 if (!objfile_has_symbols (objfile))
2629 printf_unfiltered (_("(no debugging symbols found)\n"));
2633 /* We're done reading the symbol file; finish off complaints. */
2634 clear_complaints (&symfile_complaints, 0, 1);
2636 /* Getting new symbols may change our opinion about what is
2639 reinit_frame_cache ();
2641 /* Discard cleanups as symbol reading was successful. */
2642 discard_cleanups (old_cleanups);
2644 /* If the mtime has changed between the time we set new_modtime
2645 and now, we *want* this to be out of date, so don't call stat
2647 objfile->mtime = new_modtime;
2648 init_entry_point_info (objfile);
2650 VEC_safe_push (objfilep, new_objfiles, objfile);
2658 /* Notify objfiles that we've modified objfile sections. */
2659 objfiles_changed ();
2661 clear_symtab_users (0);
2663 /* clear_objfile_data for each objfile was called before freeing it and
2664 observer_notify_new_objfile (NULL) has been called by
2665 clear_symtab_users above. Notify the new files now. */
2666 for (ix = 0; VEC_iterate (objfilep, new_objfiles, ix, objfile); ix++)
2667 observer_notify_new_objfile (objfile);
2669 /* At least one objfile has changed, so we can consider that
2670 the executable we're debugging has changed too. */
2671 observer_notify_executable_changed ();
2674 do_cleanups (all_cleanups);
2686 static filename_language *filename_language_table;
2687 static int fl_table_size, fl_table_next;
2690 add_filename_language (char *ext, enum language lang)
2692 if (fl_table_next >= fl_table_size)
2694 fl_table_size += 10;
2695 filename_language_table =
2696 xrealloc (filename_language_table,
2697 fl_table_size * sizeof (*filename_language_table));
2700 filename_language_table[fl_table_next].ext = xstrdup (ext);
2701 filename_language_table[fl_table_next].lang = lang;
2705 static char *ext_args;
2707 show_ext_args (struct ui_file *file, int from_tty,
2708 struct cmd_list_element *c, const char *value)
2710 fprintf_filtered (file,
2711 _("Mapping between filename extension "
2712 "and source language is \"%s\".\n"),
2717 set_ext_lang_command (char *args, int from_tty, struct cmd_list_element *e)
2720 char *cp = ext_args;
2723 /* First arg is filename extension, starting with '.' */
2725 error (_("'%s': Filename extension must begin with '.'"), ext_args);
2727 /* Find end of first arg. */
2728 while (*cp && !isspace (*cp))
2732 error (_("'%s': two arguments required -- "
2733 "filename extension and language"),
2736 /* Null-terminate first arg. */
2739 /* Find beginning of second arg, which should be a source language. */
2740 while (*cp && isspace (*cp))
2744 error (_("'%s': two arguments required -- "
2745 "filename extension and language"),
2748 /* Lookup the language from among those we know. */
2749 lang = language_enum (cp);
2751 /* Now lookup the filename extension: do we already know it? */
2752 for (i = 0; i < fl_table_next; i++)
2753 if (0 == strcmp (ext_args, filename_language_table[i].ext))
2756 if (i >= fl_table_next)
2758 /* New file extension. */
2759 add_filename_language (ext_args, lang);
2763 /* Redefining a previously known filename extension. */
2766 /* query ("Really make files of type %s '%s'?", */
2767 /* ext_args, language_str (lang)); */
2769 xfree (filename_language_table[i].ext);
2770 filename_language_table[i].ext = xstrdup (ext_args);
2771 filename_language_table[i].lang = lang;
2776 info_ext_lang_command (char *args, int from_tty)
2780 printf_filtered (_("Filename extensions and the languages they represent:"));
2781 printf_filtered ("\n\n");
2782 for (i = 0; i < fl_table_next; i++)
2783 printf_filtered ("\t%s\t- %s\n",
2784 filename_language_table[i].ext,
2785 language_str (filename_language_table[i].lang));
2789 init_filename_language_table (void)
2791 if (fl_table_size == 0) /* Protect against repetition. */
2795 filename_language_table =
2796 xmalloc (fl_table_size * sizeof (*filename_language_table));
2797 add_filename_language (".c", language_c);
2798 add_filename_language (".d", language_d);
2799 add_filename_language (".C", language_cplus);
2800 add_filename_language (".cc", language_cplus);
2801 add_filename_language (".cp", language_cplus);
2802 add_filename_language (".cpp", language_cplus);
2803 add_filename_language (".cxx", language_cplus);
2804 add_filename_language (".c++", language_cplus);
2805 add_filename_language (".java", language_java);
2806 add_filename_language (".class", language_java);
2807 add_filename_language (".m", language_objc);
2808 add_filename_language (".f", language_fortran);
2809 add_filename_language (".F", language_fortran);
2810 add_filename_language (".for", language_fortran);
2811 add_filename_language (".FOR", language_fortran);
2812 add_filename_language (".ftn", language_fortran);
2813 add_filename_language (".FTN", language_fortran);
2814 add_filename_language (".fpp", language_fortran);
2815 add_filename_language (".FPP", language_fortran);
2816 add_filename_language (".f90", language_fortran);
2817 add_filename_language (".F90", language_fortran);
2818 add_filename_language (".f95", language_fortran);
2819 add_filename_language (".F95", language_fortran);
2820 add_filename_language (".f03", language_fortran);
2821 add_filename_language (".F03", language_fortran);
2822 add_filename_language (".f08", language_fortran);
2823 add_filename_language (".F08", language_fortran);
2824 add_filename_language (".s", language_asm);
2825 add_filename_language (".sx", language_asm);
2826 add_filename_language (".S", language_asm);
2827 add_filename_language (".pas", language_pascal);
2828 add_filename_language (".p", language_pascal);
2829 add_filename_language (".pp", language_pascal);
2830 add_filename_language (".adb", language_ada);
2831 add_filename_language (".ads", language_ada);
2832 add_filename_language (".a", language_ada);
2833 add_filename_language (".ada", language_ada);
2834 add_filename_language (".dg", language_ada);
2839 deduce_language_from_filename (const char *filename)
2844 if (filename != NULL)
2845 if ((cp = strrchr (filename, '.')) != NULL)
2846 for (i = 0; i < fl_table_next; i++)
2847 if (strcmp (cp, filename_language_table[i].ext) == 0)
2848 return filename_language_table[i].lang;
2850 return language_unknown;
2855 Allocate and partly initialize a new symbol table. Return a pointer
2856 to it. error() if no space.
2858 Caller must set these fields:
2867 allocate_symtab (const char *filename, struct objfile *objfile)
2869 struct symtab *symtab;
2871 symtab = (struct symtab *)
2872 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symtab));
2873 memset (symtab, 0, sizeof (*symtab));
2874 symtab->filename = (char *) bcache (filename, strlen (filename) + 1,
2875 objfile->per_bfd->filename_cache);
2876 symtab->fullname = NULL;
2877 symtab->language = deduce_language_from_filename (filename);
2878 symtab->debugformat = "unknown";
2880 /* Hook it to the objfile it comes from. */
2882 symtab->objfile = objfile;
2883 symtab->next = objfile->symtabs;
2884 objfile->symtabs = symtab;
2886 if (symtab_create_debug)
2888 /* Be a bit clever with debugging messages, and don't print objfile
2889 every time, only when it changes. */
2890 static char *last_objfile_name = NULL;
2892 if (last_objfile_name == NULL
2893 || strcmp (last_objfile_name, objfile->name) != 0)
2895 xfree (last_objfile_name);
2896 last_objfile_name = xstrdup (objfile->name);
2897 fprintf_unfiltered (gdb_stdlog,
2898 "Creating one or more symtabs for objfile %s ...\n",
2901 fprintf_unfiltered (gdb_stdlog,
2902 "Created symtab %s for module %s.\n",
2903 host_address_to_string (symtab), filename);
2910 /* Reset all data structures in gdb which may contain references to symbol
2911 table data. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
2914 clear_symtab_users (int add_flags)
2916 /* Someday, we should do better than this, by only blowing away
2917 the things that really need to be blown. */
2919 /* Clear the "current" symtab first, because it is no longer valid.
2920 breakpoint_re_set may try to access the current symtab. */
2921 clear_current_source_symtab_and_line ();
2924 if ((add_flags & SYMFILE_DEFER_BP_RESET) == 0)
2925 breakpoint_re_set ();
2926 clear_last_displayed_sal ();
2927 clear_pc_function_cache ();
2928 observer_notify_new_objfile (NULL);
2930 /* Clear globals which might have pointed into a removed objfile.
2931 FIXME: It's not clear which of these are supposed to persist
2932 between expressions and which ought to be reset each time. */
2933 expression_context_block = NULL;
2934 innermost_block = NULL;
2936 /* Varobj may refer to old symbols, perform a cleanup. */
2937 varobj_invalidate ();
2942 clear_symtab_users_cleanup (void *ignore)
2944 clear_symtab_users (0);
2948 The following code implements an abstraction for debugging overlay sections.
2950 The target model is as follows:
2951 1) The gnu linker will permit multiple sections to be mapped into the
2952 same VMA, each with its own unique LMA (or load address).
2953 2) It is assumed that some runtime mechanism exists for mapping the
2954 sections, one by one, from the load address into the VMA address.
2955 3) This code provides a mechanism for gdb to keep track of which
2956 sections should be considered to be mapped from the VMA to the LMA.
2957 This information is used for symbol lookup, and memory read/write.
2958 For instance, if a section has been mapped then its contents
2959 should be read from the VMA, otherwise from the LMA.
2961 Two levels of debugger support for overlays are available. One is
2962 "manual", in which the debugger relies on the user to tell it which
2963 overlays are currently mapped. This level of support is
2964 implemented entirely in the core debugger, and the information about
2965 whether a section is mapped is kept in the objfile->obj_section table.
2967 The second level of support is "automatic", and is only available if
2968 the target-specific code provides functionality to read the target's
2969 overlay mapping table, and translate its contents for the debugger
2970 (by updating the mapped state information in the obj_section tables).
2972 The interface is as follows:
2974 overlay map <name> -- tell gdb to consider this section mapped
2975 overlay unmap <name> -- tell gdb to consider this section unmapped
2976 overlay list -- list the sections that GDB thinks are mapped
2977 overlay read-target -- get the target's state of what's mapped
2978 overlay off/manual/auto -- set overlay debugging state
2979 Functional interface:
2980 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2981 section, return that section.
2982 find_pc_overlay(pc): find any overlay section that contains
2983 the pc, either in its VMA or its LMA
2984 section_is_mapped(sect): true if overlay is marked as mapped
2985 section_is_overlay(sect): true if section's VMA != LMA
2986 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2987 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2988 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2989 overlay_mapped_address(...): map an address from section's LMA to VMA
2990 overlay_unmapped_address(...): map an address from section's VMA to LMA
2991 symbol_overlayed_address(...): Return a "current" address for symbol:
2992 either in VMA or LMA depending on whether
2993 the symbol's section is currently mapped. */
2995 /* Overlay debugging state: */
2997 enum overlay_debugging_state overlay_debugging = ovly_off;
2998 int overlay_cache_invalid = 0; /* True if need to refresh mapped state. */
3000 /* Function: section_is_overlay (SECTION)
3001 Returns true if SECTION has VMA not equal to LMA, ie.
3002 SECTION is loaded at an address different from where it will "run". */
3005 section_is_overlay (struct obj_section *section)
3007 if (overlay_debugging && section)
3009 bfd *abfd = section->objfile->obfd;
3010 asection *bfd_section = section->the_bfd_section;
3012 if (bfd_section_lma (abfd, bfd_section) != 0
3013 && bfd_section_lma (abfd, bfd_section)
3014 != bfd_section_vma (abfd, bfd_section))
3021 /* Function: overlay_invalidate_all (void)
3022 Invalidate the mapped state of all overlay sections (mark it as stale). */
3025 overlay_invalidate_all (void)
3027 struct objfile *objfile;
3028 struct obj_section *sect;
3030 ALL_OBJSECTIONS (objfile, sect)
3031 if (section_is_overlay (sect))
3032 sect->ovly_mapped = -1;
3035 /* Function: section_is_mapped (SECTION)
3036 Returns true if section is an overlay, and is currently mapped.
3038 Access to the ovly_mapped flag is restricted to this function, so
3039 that we can do automatic update. If the global flag
3040 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
3041 overlay_invalidate_all. If the mapped state of the particular
3042 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
3045 section_is_mapped (struct obj_section *osect)
3047 struct gdbarch *gdbarch;
3049 if (osect == 0 || !section_is_overlay (osect))
3052 switch (overlay_debugging)
3056 return 0; /* overlay debugging off */
3057 case ovly_auto: /* overlay debugging automatic */
3058 /* Unles there is a gdbarch_overlay_update function,
3059 there's really nothing useful to do here (can't really go auto). */
3060 gdbarch = get_objfile_arch (osect->objfile);
3061 if (gdbarch_overlay_update_p (gdbarch))
3063 if (overlay_cache_invalid)
3065 overlay_invalidate_all ();
3066 overlay_cache_invalid = 0;
3068 if (osect->ovly_mapped == -1)
3069 gdbarch_overlay_update (gdbarch, osect);
3071 /* fall thru to manual case */
3072 case ovly_on: /* overlay debugging manual */
3073 return osect->ovly_mapped == 1;
3077 /* Function: pc_in_unmapped_range
3078 If PC falls into the lma range of SECTION, return true, else false. */
3081 pc_in_unmapped_range (CORE_ADDR pc, struct obj_section *section)
3083 if (section_is_overlay (section))
3085 bfd *abfd = section->objfile->obfd;
3086 asection *bfd_section = section->the_bfd_section;
3088 /* We assume the LMA is relocated by the same offset as the VMA. */
3089 bfd_vma size = bfd_get_section_size (bfd_section);
3090 CORE_ADDR offset = obj_section_offset (section);
3092 if (bfd_get_section_lma (abfd, bfd_section) + offset <= pc
3093 && pc < bfd_get_section_lma (abfd, bfd_section) + offset + size)
3100 /* Function: pc_in_mapped_range
3101 If PC falls into the vma range of SECTION, return true, else false. */
3104 pc_in_mapped_range (CORE_ADDR pc, struct obj_section *section)
3106 if (section_is_overlay (section))
3108 if (obj_section_addr (section) <= pc
3109 && pc < obj_section_endaddr (section))
3117 /* Return true if the mapped ranges of sections A and B overlap, false
3120 sections_overlap (struct obj_section *a, struct obj_section *b)
3122 CORE_ADDR a_start = obj_section_addr (a);
3123 CORE_ADDR a_end = obj_section_endaddr (a);
3124 CORE_ADDR b_start = obj_section_addr (b);
3125 CORE_ADDR b_end = obj_section_endaddr (b);
3127 return (a_start < b_end && b_start < a_end);
3130 /* Function: overlay_unmapped_address (PC, SECTION)
3131 Returns the address corresponding to PC in the unmapped (load) range.
3132 May be the same as PC. */
3135 overlay_unmapped_address (CORE_ADDR pc, struct obj_section *section)
3137 if (section_is_overlay (section) && pc_in_mapped_range (pc, section))
3139 bfd *abfd = section->objfile->obfd;
3140 asection *bfd_section = section->the_bfd_section;
3142 return pc + bfd_section_lma (abfd, bfd_section)
3143 - bfd_section_vma (abfd, bfd_section);
3149 /* Function: overlay_mapped_address (PC, SECTION)
3150 Returns the address corresponding to PC in the mapped (runtime) range.
3151 May be the same as PC. */
3154 overlay_mapped_address (CORE_ADDR pc, struct obj_section *section)
3156 if (section_is_overlay (section) && pc_in_unmapped_range (pc, section))
3158 bfd *abfd = section->objfile->obfd;
3159 asection *bfd_section = section->the_bfd_section;
3161 return pc + bfd_section_vma (abfd, bfd_section)
3162 - bfd_section_lma (abfd, bfd_section);
3169 /* Function: symbol_overlayed_address
3170 Return one of two addresses (relative to the VMA or to the LMA),
3171 depending on whether the section is mapped or not. */
3174 symbol_overlayed_address (CORE_ADDR address, struct obj_section *section)
3176 if (overlay_debugging)
3178 /* If the symbol has no section, just return its regular address. */
3181 /* If the symbol's section is not an overlay, just return its
3183 if (!section_is_overlay (section))
3185 /* If the symbol's section is mapped, just return its address. */
3186 if (section_is_mapped (section))
3189 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3190 * then return its LOADED address rather than its vma address!!
3192 return overlay_unmapped_address (address, section);
3197 /* Function: find_pc_overlay (PC)
3198 Return the best-match overlay section for PC:
3199 If PC matches a mapped overlay section's VMA, return that section.
3200 Else if PC matches an unmapped section's VMA, return that section.
3201 Else if PC matches an unmapped section's LMA, return that section. */
3203 struct obj_section *
3204 find_pc_overlay (CORE_ADDR pc)
3206 struct objfile *objfile;
3207 struct obj_section *osect, *best_match = NULL;
3209 if (overlay_debugging)
3210 ALL_OBJSECTIONS (objfile, osect)
3211 if (section_is_overlay (osect))
3213 if (pc_in_mapped_range (pc, osect))
3215 if (section_is_mapped (osect))
3220 else if (pc_in_unmapped_range (pc, osect))
3226 /* Function: find_pc_mapped_section (PC)
3227 If PC falls into the VMA address range of an overlay section that is
3228 currently marked as MAPPED, return that section. Else return NULL. */
3230 struct obj_section *
3231 find_pc_mapped_section (CORE_ADDR pc)
3233 struct objfile *objfile;
3234 struct obj_section *osect;
3236 if (overlay_debugging)
3237 ALL_OBJSECTIONS (objfile, osect)
3238 if (pc_in_mapped_range (pc, osect) && section_is_mapped (osect))
3244 /* Function: list_overlays_command
3245 Print a list of mapped sections and their PC ranges. */
3248 list_overlays_command (char *args, int from_tty)
3251 struct objfile *objfile;
3252 struct obj_section *osect;
3254 if (overlay_debugging)
3255 ALL_OBJSECTIONS (objfile, osect)
3256 if (section_is_mapped (osect))
3258 struct gdbarch *gdbarch = get_objfile_arch (objfile);
3263 vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section);
3264 lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section);
3265 size = bfd_get_section_size (osect->the_bfd_section);
3266 name = bfd_section_name (objfile->obfd, osect->the_bfd_section);
3268 printf_filtered ("Section %s, loaded at ", name);
3269 fputs_filtered (paddress (gdbarch, lma), gdb_stdout);
3270 puts_filtered (" - ");
3271 fputs_filtered (paddress (gdbarch, lma + size), gdb_stdout);
3272 printf_filtered (", mapped at ");
3273 fputs_filtered (paddress (gdbarch, vma), gdb_stdout);
3274 puts_filtered (" - ");
3275 fputs_filtered (paddress (gdbarch, vma + size), gdb_stdout);
3276 puts_filtered ("\n");
3281 printf_filtered (_("No sections are mapped.\n"));
3284 /* Function: map_overlay_command
3285 Mark the named section as mapped (ie. residing at its VMA address). */
3288 map_overlay_command (char *args, int from_tty)
3290 struct objfile *objfile, *objfile2;
3291 struct obj_section *sec, *sec2;
3293 if (!overlay_debugging)
3294 error (_("Overlay debugging not enabled. Use "
3295 "either the 'overlay auto' or\n"
3296 "the 'overlay manual' command."));
3298 if (args == 0 || *args == 0)
3299 error (_("Argument required: name of an overlay section"));
3301 /* First, find a section matching the user supplied argument. */
3302 ALL_OBJSECTIONS (objfile, sec)
3303 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
3305 /* Now, check to see if the section is an overlay. */
3306 if (!section_is_overlay (sec))
3307 continue; /* not an overlay section */
3309 /* Mark the overlay as "mapped". */
3310 sec->ovly_mapped = 1;
3312 /* Next, make a pass and unmap any sections that are
3313 overlapped by this new section: */
3314 ALL_OBJSECTIONS (objfile2, sec2)
3315 if (sec2->ovly_mapped && sec != sec2 && sections_overlap (sec, sec2))
3318 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3319 bfd_section_name (objfile->obfd,
3320 sec2->the_bfd_section));
3321 sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2. */
3325 error (_("No overlay section called %s"), args);
3328 /* Function: unmap_overlay_command
3329 Mark the overlay section as unmapped
3330 (ie. resident in its LMA address range, rather than the VMA range). */
3333 unmap_overlay_command (char *args, int from_tty)
3335 struct objfile *objfile;
3336 struct obj_section *sec;
3338 if (!overlay_debugging)
3339 error (_("Overlay debugging not enabled. "
3340 "Use either the 'overlay auto' or\n"
3341 "the 'overlay manual' command."));
3343 if (args == 0 || *args == 0)
3344 error (_("Argument required: name of an overlay section"));
3346 /* First, find a section matching the user supplied argument. */
3347 ALL_OBJSECTIONS (objfile, sec)
3348 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
3350 if (!sec->ovly_mapped)
3351 error (_("Section %s is not mapped"), args);
3352 sec->ovly_mapped = 0;
3355 error (_("No overlay section called %s"), args);
3358 /* Function: overlay_auto_command
3359 A utility command to turn on overlay debugging.
3360 Possibly this should be done via a set/show command. */
3363 overlay_auto_command (char *args, int from_tty)
3365 overlay_debugging = ovly_auto;
3366 enable_overlay_breakpoints ();
3368 printf_unfiltered (_("Automatic overlay debugging enabled."));
3371 /* Function: overlay_manual_command
3372 A utility command to turn on overlay debugging.
3373 Possibly this should be done via a set/show command. */
3376 overlay_manual_command (char *args, int from_tty)
3378 overlay_debugging = ovly_on;
3379 disable_overlay_breakpoints ();
3381 printf_unfiltered (_("Overlay debugging enabled."));
3384 /* Function: overlay_off_command
3385 A utility command to turn on overlay debugging.
3386 Possibly this should be done via a set/show command. */
3389 overlay_off_command (char *args, int from_tty)
3391 overlay_debugging = ovly_off;
3392 disable_overlay_breakpoints ();
3394 printf_unfiltered (_("Overlay debugging disabled."));
3398 overlay_load_command (char *args, int from_tty)
3400 struct gdbarch *gdbarch = get_current_arch ();
3402 if (gdbarch_overlay_update_p (gdbarch))
3403 gdbarch_overlay_update (gdbarch, NULL);
3405 error (_("This target does not know how to read its overlay state."));
3408 /* Function: overlay_command
3409 A place-holder for a mis-typed command. */
3411 /* Command list chain containing all defined "overlay" subcommands. */
3412 static struct cmd_list_element *overlaylist;
3415 overlay_command (char *args, int from_tty)
3418 ("\"overlay\" must be followed by the name of an overlay command.\n");
3419 help_list (overlaylist, "overlay ", -1, gdb_stdout);
3423 /* Target Overlays for the "Simplest" overlay manager:
3425 This is GDB's default target overlay layer. It works with the
3426 minimal overlay manager supplied as an example by Cygnus. The
3427 entry point is via a function pointer "gdbarch_overlay_update",
3428 so targets that use a different runtime overlay manager can
3429 substitute their own overlay_update function and take over the
3432 The overlay_update function pokes around in the target's data structures
3433 to see what overlays are mapped, and updates GDB's overlay mapping with
3436 In this simple implementation, the target data structures are as follows:
3437 unsigned _novlys; /# number of overlay sections #/
3438 unsigned _ovly_table[_novlys][4] = {
3439 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3440 {..., ..., ..., ...},
3442 unsigned _novly_regions; /# number of overlay regions #/
3443 unsigned _ovly_region_table[_novly_regions][3] = {
3444 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3447 These functions will attempt to update GDB's mappedness state in the
3448 symbol section table, based on the target's mappedness state.
3450 To do this, we keep a cached copy of the target's _ovly_table, and
3451 attempt to detect when the cached copy is invalidated. The main
3452 entry point is "simple_overlay_update(SECT), which looks up SECT in
3453 the cached table and re-reads only the entry for that section from
3454 the target (whenever possible). */
3456 /* Cached, dynamically allocated copies of the target data structures: */
3457 static unsigned (*cache_ovly_table)[4] = 0;
3458 static unsigned cache_novlys = 0;
3459 static CORE_ADDR cache_ovly_table_base = 0;
3462 VMA, SIZE, LMA, MAPPED
3465 /* Throw away the cached copy of _ovly_table. */
3467 simple_free_overlay_table (void)
3469 if (cache_ovly_table)
3470 xfree (cache_ovly_table);
3472 cache_ovly_table = NULL;
3473 cache_ovly_table_base = 0;
3476 /* Read an array of ints of size SIZE from the target into a local buffer.
3477 Convert to host order. int LEN is number of ints. */
3479 read_target_long_array (CORE_ADDR memaddr, unsigned int *myaddr,
3480 int len, int size, enum bfd_endian byte_order)
3482 /* FIXME (alloca): Not safe if array is very large. */
3483 gdb_byte *buf = alloca (len * size);
3486 read_memory (memaddr, buf, len * size);
3487 for (i = 0; i < len; i++)
3488 myaddr[i] = extract_unsigned_integer (size * i + buf, size, byte_order);
3491 /* Find and grab a copy of the target _ovly_table
3492 (and _novlys, which is needed for the table's size). */
3494 simple_read_overlay_table (void)
3496 struct minimal_symbol *novlys_msym, *ovly_table_msym;
3497 struct gdbarch *gdbarch;
3499 enum bfd_endian byte_order;
3501 simple_free_overlay_table ();
3502 novlys_msym = lookup_minimal_symbol ("_novlys", NULL, NULL);
3505 error (_("Error reading inferior's overlay table: "
3506 "couldn't find `_novlys' variable\n"
3507 "in inferior. Use `overlay manual' mode."));
3511 ovly_table_msym = lookup_minimal_symbol ("_ovly_table", NULL, NULL);
3512 if (! ovly_table_msym)
3514 error (_("Error reading inferior's overlay table: couldn't find "
3515 "`_ovly_table' array\n"
3516 "in inferior. Use `overlay manual' mode."));
3520 gdbarch = get_objfile_arch (msymbol_objfile (ovly_table_msym));
3521 word_size = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT;
3522 byte_order = gdbarch_byte_order (gdbarch);
3524 cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym),
3527 = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table));
3528 cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (ovly_table_msym);
3529 read_target_long_array (cache_ovly_table_base,
3530 (unsigned int *) cache_ovly_table,
3531 cache_novlys * 4, word_size, byte_order);
3533 return 1; /* SUCCESS */
3536 /* Function: simple_overlay_update_1
3537 A helper function for simple_overlay_update. Assuming a cached copy
3538 of _ovly_table exists, look through it to find an entry whose vma,
3539 lma and size match those of OSECT. Re-read the entry and make sure
3540 it still matches OSECT (else the table may no longer be valid).
3541 Set OSECT's mapped state to match the entry. Return: 1 for
3542 success, 0 for failure. */
3545 simple_overlay_update_1 (struct obj_section *osect)
3548 bfd *obfd = osect->objfile->obfd;
3549 asection *bsect = osect->the_bfd_section;
3550 struct gdbarch *gdbarch = get_objfile_arch (osect->objfile);
3551 int word_size = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT;
3552 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3554 size = bfd_get_section_size (osect->the_bfd_section);
3555 for (i = 0; i < cache_novlys; i++)
3556 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3557 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3558 /* && cache_ovly_table[i][SIZE] == size */ )
3560 read_target_long_array (cache_ovly_table_base + i * word_size,
3561 (unsigned int *) cache_ovly_table[i],
3562 4, word_size, byte_order);
3563 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3564 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3565 /* && cache_ovly_table[i][SIZE] == size */ )
3567 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3570 else /* Warning! Warning! Target's ovly table has changed! */
3576 /* Function: simple_overlay_update
3577 If OSECT is NULL, then update all sections' mapped state
3578 (after re-reading the entire target _ovly_table).
3579 If OSECT is non-NULL, then try to find a matching entry in the
3580 cached ovly_table and update only OSECT's mapped state.
3581 If a cached entry can't be found or the cache isn't valid, then
3582 re-read the entire cache, and go ahead and update all sections. */
3585 simple_overlay_update (struct obj_section *osect)
3587 struct objfile *objfile;
3589 /* Were we given an osect to look up? NULL means do all of them. */
3591 /* Have we got a cached copy of the target's overlay table? */
3592 if (cache_ovly_table != NULL)
3594 /* Does its cached location match what's currently in the
3596 struct minimal_symbol *minsym
3597 = lookup_minimal_symbol ("_ovly_table", NULL, NULL);
3600 error (_("Error reading inferior's overlay table: couldn't "
3601 "find `_ovly_table' array\n"
3602 "in inferior. Use `overlay manual' mode."));
3604 if (cache_ovly_table_base == SYMBOL_VALUE_ADDRESS (minsym))
3605 /* Then go ahead and try to look up this single section in
3607 if (simple_overlay_update_1 (osect))
3608 /* Found it! We're done. */
3612 /* Cached table no good: need to read the entire table anew.
3613 Or else we want all the sections, in which case it's actually
3614 more efficient to read the whole table in one block anyway. */
3616 if (! simple_read_overlay_table ())
3619 /* Now may as well update all sections, even if only one was requested. */
3620 ALL_OBJSECTIONS (objfile, osect)
3621 if (section_is_overlay (osect))
3624 bfd *obfd = osect->objfile->obfd;
3625 asection *bsect = osect->the_bfd_section;
3627 size = bfd_get_section_size (bsect);
3628 for (i = 0; i < cache_novlys; i++)
3629 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3630 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3631 /* && cache_ovly_table[i][SIZE] == size */ )
3632 { /* obj_section matches i'th entry in ovly_table. */
3633 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3634 break; /* finished with inner for loop: break out. */
3639 /* Set the output sections and output offsets for section SECTP in
3640 ABFD. The relocation code in BFD will read these offsets, so we
3641 need to be sure they're initialized. We map each section to itself,
3642 with no offset; this means that SECTP->vma will be honored. */
3645 symfile_dummy_outputs (bfd *abfd, asection *sectp, void *dummy)
3647 sectp->output_section = sectp;
3648 sectp->output_offset = 0;
3651 /* Default implementation for sym_relocate. */
3655 default_symfile_relocate (struct objfile *objfile, asection *sectp,
3658 /* Use sectp->owner instead of objfile->obfd. sectp may point to a
3660 bfd *abfd = sectp->owner;
3662 /* We're only interested in sections with relocation
3664 if ((sectp->flags & SEC_RELOC) == 0)
3667 /* We will handle section offsets properly elsewhere, so relocate as if
3668 all sections begin at 0. */
3669 bfd_map_over_sections (abfd, symfile_dummy_outputs, NULL);
3671 return bfd_simple_get_relocated_section_contents (abfd, sectp, buf, NULL);
3674 /* Relocate the contents of a debug section SECTP in ABFD. The
3675 contents are stored in BUF if it is non-NULL, or returned in a
3676 malloc'd buffer otherwise.
3678 For some platforms and debug info formats, shared libraries contain
3679 relocations against the debug sections (particularly for DWARF-2;
3680 one affected platform is PowerPC GNU/Linux, although it depends on
3681 the version of the linker in use). Also, ELF object files naturally
3682 have unresolved relocations for their debug sections. We need to apply
3683 the relocations in order to get the locations of symbols correct.
3684 Another example that may require relocation processing, is the
3685 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3689 symfile_relocate_debug_section (struct objfile *objfile,
3690 asection *sectp, bfd_byte *buf)
3692 gdb_assert (objfile->sf->sym_relocate);
3694 return (*objfile->sf->sym_relocate) (objfile, sectp, buf);
3697 struct symfile_segment_data *
3698 get_symfile_segment_data (bfd *abfd)
3700 const struct sym_fns *sf = find_sym_fns (abfd);
3705 return sf->sym_segments (abfd);
3709 free_symfile_segment_data (struct symfile_segment_data *data)
3711 xfree (data->segment_bases);
3712 xfree (data->segment_sizes);
3713 xfree (data->segment_info);
3719 - DATA, containing segment addresses from the object file ABFD, and
3720 the mapping from ABFD's sections onto the segments that own them,
3722 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3723 segment addresses reported by the target,
3724 store the appropriate offsets for each section in OFFSETS.
3726 If there are fewer entries in SEGMENT_BASES than there are segments
3727 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3729 If there are more entries, then ignore the extra. The target may
3730 not be able to distinguish between an empty data segment and a
3731 missing data segment; a missing text segment is less plausible. */
3733 symfile_map_offsets_to_segments (bfd *abfd, struct symfile_segment_data *data,
3734 struct section_offsets *offsets,
3735 int num_segment_bases,
3736 const CORE_ADDR *segment_bases)
3741 /* It doesn't make sense to call this function unless you have some
3742 segment base addresses. */
3743 gdb_assert (num_segment_bases > 0);
3745 /* If we do not have segment mappings for the object file, we
3746 can not relocate it by segments. */
3747 gdb_assert (data != NULL);
3748 gdb_assert (data->num_segments > 0);
3750 for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next)
3752 int which = data->segment_info[i];
3754 gdb_assert (0 <= which && which <= data->num_segments);
3756 /* Don't bother computing offsets for sections that aren't
3757 loaded as part of any segment. */
3761 /* Use the last SEGMENT_BASES entry as the address of any extra
3762 segments mentioned in DATA->segment_info. */
3763 if (which > num_segment_bases)
3764 which = num_segment_bases;
3766 offsets->offsets[i] = (segment_bases[which - 1]
3767 - data->segment_bases[which - 1]);
3774 symfile_find_segment_sections (struct objfile *objfile)
3776 bfd *abfd = objfile->obfd;
3779 struct symfile_segment_data *data;
3781 data = get_symfile_segment_data (objfile->obfd);
3785 if (data->num_segments != 1 && data->num_segments != 2)
3787 free_symfile_segment_data (data);
3791 for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next)
3793 int which = data->segment_info[i];
3797 if (objfile->sect_index_text == -1)
3798 objfile->sect_index_text = sect->index;
3800 if (objfile->sect_index_rodata == -1)
3801 objfile->sect_index_rodata = sect->index;
3803 else if (which == 2)
3805 if (objfile->sect_index_data == -1)
3806 objfile->sect_index_data = sect->index;
3808 if (objfile->sect_index_bss == -1)
3809 objfile->sect_index_bss = sect->index;
3813 free_symfile_segment_data (data);
3817 _initialize_symfile (void)
3819 struct cmd_list_element *c;
3821 c = add_cmd ("symbol-file", class_files, symbol_file_command, _("\
3822 Load symbol table from executable file FILE.\n\
3823 The `file' command can also load symbol tables, as well as setting the file\n\
3824 to execute."), &cmdlist);
3825 set_cmd_completer (c, filename_completer);
3827 c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command, _("\
3828 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3829 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR>\
3830 ...]\nADDR is the starting address of the file's text.\n\
3831 The optional arguments are section-name section-address pairs and\n\
3832 should be specified if the data and bss segments are not contiguous\n\
3833 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3835 set_cmd_completer (c, filename_completer);
3837 c = add_cmd ("load", class_files, load_command, _("\
3838 Dynamically load FILE into the running program, and record its symbols\n\
3839 for access from GDB.\n\
3840 A load OFFSET may also be given."), &cmdlist);
3841 set_cmd_completer (c, filename_completer);
3843 add_prefix_cmd ("overlay", class_support, overlay_command,
3844 _("Commands for debugging overlays."), &overlaylist,
3845 "overlay ", 0, &cmdlist);
3847 add_com_alias ("ovly", "overlay", class_alias, 1);
3848 add_com_alias ("ov", "overlay", class_alias, 1);
3850 add_cmd ("map-overlay", class_support, map_overlay_command,
3851 _("Assert that an overlay section is mapped."), &overlaylist);
3853 add_cmd ("unmap-overlay", class_support, unmap_overlay_command,
3854 _("Assert that an overlay section is unmapped."), &overlaylist);
3856 add_cmd ("list-overlays", class_support, list_overlays_command,
3857 _("List mappings of overlay sections."), &overlaylist);
3859 add_cmd ("manual", class_support, overlay_manual_command,
3860 _("Enable overlay debugging."), &overlaylist);
3861 add_cmd ("off", class_support, overlay_off_command,
3862 _("Disable overlay debugging."), &overlaylist);
3863 add_cmd ("auto", class_support, overlay_auto_command,
3864 _("Enable automatic overlay debugging."), &overlaylist);
3865 add_cmd ("load-target", class_support, overlay_load_command,
3866 _("Read the overlay mapping state from the target."), &overlaylist);
3868 /* Filename extension to source language lookup table: */
3869 init_filename_language_table ();
3870 add_setshow_string_noescape_cmd ("extension-language", class_files,
3872 Set mapping between filename extension and source language."), _("\
3873 Show mapping between filename extension and source language."), _("\
3874 Usage: set extension-language .foo bar"),
3875 set_ext_lang_command,
3877 &setlist, &showlist);
3879 add_info ("extensions", info_ext_lang_command,
3880 _("All filename extensions associated with a source language."));
3882 add_setshow_optional_filename_cmd ("debug-file-directory", class_support,
3883 &debug_file_directory, _("\
3884 Set the directories where separate debug symbols are searched for."), _("\
3885 Show the directories where separate debug symbols are searched for."), _("\
3886 Separate debug symbols are first searched for in the same\n\
3887 directory as the binary, then in the `" DEBUG_SUBDIRECTORY "' subdirectory,\n\
3888 and lastly at the path of the directory of the binary with\n\
3889 each global debug-file-directory component prepended."),
3891 show_debug_file_directory,
3892 &setlist, &showlist);