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"
59 #include <sys/types.h>
61 #include "gdb_string.h"
69 int (*deprecated_ui_load_progress_hook) (const char *section,
71 void (*deprecated_show_load_progress) (const char *section,
72 unsigned long section_sent,
73 unsigned long section_size,
74 unsigned long total_sent,
75 unsigned long total_size);
76 void (*deprecated_pre_add_symbol_hook) (const char *);
77 void (*deprecated_post_add_symbol_hook) (void);
79 static void clear_symtab_users_cleanup (void *ignore);
81 /* Global variables owned by this file. */
82 int readnow_symbol_files; /* Read full symbols immediately. */
84 /* External variables and functions referenced. */
86 extern void report_transfer_performance (unsigned long, time_t, time_t);
88 /* Functions this file defines. */
90 static void load_command (char *, int);
92 static void symbol_file_add_main_1 (char *args, int from_tty, int flags);
94 static void add_symbol_file_command (char *, int);
96 bfd *symfile_bfd_open (char *);
98 int get_section_index (struct objfile *, char *);
100 static const struct sym_fns *find_sym_fns (bfd *);
102 static void decrement_reading_symtab (void *);
104 static void overlay_invalidate_all (void);
106 void list_overlays_command (char *, int);
108 void map_overlay_command (char *, int);
110 void unmap_overlay_command (char *, int);
112 static void overlay_auto_command (char *, int);
114 static void overlay_manual_command (char *, int);
116 static void overlay_off_command (char *, int);
118 static void overlay_load_command (char *, int);
120 static void overlay_command (char *, int);
122 static void simple_free_overlay_table (void);
124 static void read_target_long_array (CORE_ADDR, unsigned int *, int, int,
127 static int simple_read_overlay_table (void);
129 static int simple_overlay_update_1 (struct obj_section *);
131 static void add_filename_language (char *ext, enum language lang);
133 static void info_ext_lang_command (char *args, int from_tty);
135 static void init_filename_language_table (void);
137 static void symfile_find_segment_sections (struct objfile *objfile);
139 void _initialize_symfile (void);
141 /* List of all available sym_fns. On gdb startup, each object file reader
142 calls add_symtab_fns() to register information on each format it is
145 typedef const struct sym_fns *sym_fns_ptr;
146 DEF_VEC_P (sym_fns_ptr);
148 static VEC (sym_fns_ptr) *symtab_fns = NULL;
150 /* Flag for whether user will be reloading symbols multiple times.
151 Defaults to ON for VxWorks, otherwise OFF. */
153 #ifdef SYMBOL_RELOADING_DEFAULT
154 int symbol_reloading = SYMBOL_RELOADING_DEFAULT;
156 int symbol_reloading = 0;
159 show_symbol_reloading (struct ui_file *file, int from_tty,
160 struct cmd_list_element *c, const char *value)
162 fprintf_filtered (file, _("Dynamic symbol table reloading "
163 "multiple times in one run is %s.\n"),
167 /* If non-zero, shared library symbols will be added automatically
168 when the inferior is created, new libraries are loaded, or when
169 attaching to the inferior. This is almost always what users will
170 want to have happen; but for very large programs, the startup time
171 will be excessive, and so if this is a problem, the user can clear
172 this flag and then add the shared library symbols as needed. Note
173 that there is a potential for confusion, since if the shared
174 library symbols are not loaded, commands like "info fun" will *not*
175 report all the functions that are actually present. */
177 int auto_solib_add = 1;
180 /* Make a null terminated copy of the string at PTR with SIZE characters in
181 the obstack pointed to by OBSTACKP . Returns the address of the copy.
182 Note that the string at PTR does not have to be null terminated, I.e. it
183 may be part of a larger string and we are only saving a substring. */
186 obsavestring (const char *ptr, int size, struct obstack *obstackp)
188 char *p = (char *) obstack_alloc (obstackp, size + 1);
189 /* Open-coded memcpy--saves function call time. These strings are usually
190 short. FIXME: Is this really still true with a compiler that can
193 const char *p1 = ptr;
195 const char *end = ptr + size;
204 /* Concatenate NULL terminated variable argument list of `const char *'
205 strings; return the new string. Space is found in the OBSTACKP.
206 Argument list must be terminated by a sentinel expression `(char *)
210 obconcat (struct obstack *obstackp, ...)
214 va_start (ap, obstackp);
217 const char *s = va_arg (ap, const char *);
222 obstack_grow_str (obstackp, s);
225 obstack_1grow (obstackp, 0);
227 return obstack_finish (obstackp);
230 /* True if we are reading a symbol table. */
232 int currently_reading_symtab = 0;
235 decrement_reading_symtab (void *dummy)
237 currently_reading_symtab--;
240 /* Increment currently_reading_symtab and return a cleanup that can be
241 used to decrement it. */
243 increment_reading_symtab (void)
245 ++currently_reading_symtab;
246 return make_cleanup (decrement_reading_symtab, NULL);
249 /* Remember the lowest-addressed loadable section we've seen.
250 This function is called via bfd_map_over_sections.
252 In case of equal vmas, the section with the largest size becomes the
253 lowest-addressed loadable section.
255 If the vmas and sizes are equal, the last section is considered the
256 lowest-addressed loadable section. */
259 find_lowest_section (bfd *abfd, asection *sect, void *obj)
261 asection **lowest = (asection **) obj;
263 if (0 == (bfd_get_section_flags (abfd, sect) & (SEC_ALLOC | SEC_LOAD)))
266 *lowest = sect; /* First loadable section */
267 else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect))
268 *lowest = sect; /* A lower loadable section */
269 else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect)
270 && (bfd_section_size (abfd, (*lowest))
271 <= bfd_section_size (abfd, sect)))
275 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
277 struct section_addr_info *
278 alloc_section_addr_info (size_t num_sections)
280 struct section_addr_info *sap;
283 size = (sizeof (struct section_addr_info)
284 + sizeof (struct other_sections) * (num_sections - 1));
285 sap = (struct section_addr_info *) xmalloc (size);
286 memset (sap, 0, size);
287 sap->num_sections = num_sections;
292 /* Build (allocate and populate) a section_addr_info struct from
293 an existing section table. */
295 extern struct section_addr_info *
296 build_section_addr_info_from_section_table (const struct target_section *start,
297 const struct target_section *end)
299 struct section_addr_info *sap;
300 const struct target_section *stp;
303 sap = alloc_section_addr_info (end - start);
305 for (stp = start, oidx = 0; stp != end; stp++)
307 if (bfd_get_section_flags (stp->bfd,
308 stp->the_bfd_section) & (SEC_ALLOC | SEC_LOAD)
309 && oidx < end - start)
311 sap->other[oidx].addr = stp->addr;
312 sap->other[oidx].name
313 = xstrdup (bfd_section_name (stp->bfd, stp->the_bfd_section));
314 sap->other[oidx].sectindex = stp->the_bfd_section->index;
322 /* Create a section_addr_info from section offsets in ABFD. */
324 static struct section_addr_info *
325 build_section_addr_info_from_bfd (bfd *abfd)
327 struct section_addr_info *sap;
329 struct bfd_section *sec;
331 sap = alloc_section_addr_info (bfd_count_sections (abfd));
332 for (i = 0, sec = abfd->sections; sec != NULL; sec = sec->next)
333 if (bfd_get_section_flags (abfd, sec) & (SEC_ALLOC | SEC_LOAD))
335 sap->other[i].addr = bfd_get_section_vma (abfd, sec);
336 sap->other[i].name = xstrdup (bfd_get_section_name (abfd, sec));
337 sap->other[i].sectindex = sec->index;
343 /* Create a section_addr_info from section offsets in OBJFILE. */
345 struct section_addr_info *
346 build_section_addr_info_from_objfile (const struct objfile *objfile)
348 struct section_addr_info *sap;
351 /* Before reread_symbols gets rewritten it is not safe to call:
352 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
354 sap = build_section_addr_info_from_bfd (objfile->obfd);
355 for (i = 0; i < sap->num_sections && sap->other[i].name; i++)
357 int sectindex = sap->other[i].sectindex;
359 sap->other[i].addr += objfile->section_offsets->offsets[sectindex];
364 /* Free all memory allocated by build_section_addr_info_from_section_table. */
367 free_section_addr_info (struct section_addr_info *sap)
371 for (idx = 0; idx < sap->num_sections; idx++)
372 if (sap->other[idx].name)
373 xfree (sap->other[idx].name);
378 /* Initialize OBJFILE's sect_index_* members. */
380 init_objfile_sect_indices (struct objfile *objfile)
385 sect = bfd_get_section_by_name (objfile->obfd, ".text");
387 objfile->sect_index_text = sect->index;
389 sect = bfd_get_section_by_name (objfile->obfd, ".data");
391 objfile->sect_index_data = sect->index;
393 sect = bfd_get_section_by_name (objfile->obfd, ".bss");
395 objfile->sect_index_bss = sect->index;
397 sect = bfd_get_section_by_name (objfile->obfd, ".rodata");
399 objfile->sect_index_rodata = sect->index;
401 /* This is where things get really weird... We MUST have valid
402 indices for the various sect_index_* members or gdb will abort.
403 So if for example, there is no ".text" section, we have to
404 accomodate that. First, check for a file with the standard
405 one or two segments. */
407 symfile_find_segment_sections (objfile);
409 /* Except when explicitly adding symbol files at some address,
410 section_offsets contains nothing but zeros, so it doesn't matter
411 which slot in section_offsets the individual sect_index_* members
412 index into. So if they are all zero, it is safe to just point
413 all the currently uninitialized indices to the first slot. But
414 beware: if this is the main executable, it may be relocated
415 later, e.g. by the remote qOffsets packet, and then this will
416 be wrong! That's why we try segments first. */
418 for (i = 0; i < objfile->num_sections; i++)
420 if (ANOFFSET (objfile->section_offsets, i) != 0)
425 if (i == objfile->num_sections)
427 if (objfile->sect_index_text == -1)
428 objfile->sect_index_text = 0;
429 if (objfile->sect_index_data == -1)
430 objfile->sect_index_data = 0;
431 if (objfile->sect_index_bss == -1)
432 objfile->sect_index_bss = 0;
433 if (objfile->sect_index_rodata == -1)
434 objfile->sect_index_rodata = 0;
438 /* The arguments to place_section. */
440 struct place_section_arg
442 struct section_offsets *offsets;
446 /* Find a unique offset to use for loadable section SECT if
447 the user did not provide an offset. */
450 place_section (bfd *abfd, asection *sect, void *obj)
452 struct place_section_arg *arg = obj;
453 CORE_ADDR *offsets = arg->offsets->offsets, start_addr;
455 ULONGEST align = ((ULONGEST) 1) << bfd_get_section_alignment (abfd, sect);
457 /* We are only interested in allocated sections. */
458 if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0)
461 /* If the user specified an offset, honor it. */
462 if (offsets[sect->index] != 0)
465 /* Otherwise, let's try to find a place for the section. */
466 start_addr = (arg->lowest + align - 1) & -align;
473 for (cur_sec = abfd->sections; cur_sec != NULL; cur_sec = cur_sec->next)
475 int indx = cur_sec->index;
477 /* We don't need to compare against ourself. */
481 /* We can only conflict with allocated sections. */
482 if ((bfd_get_section_flags (abfd, cur_sec) & SEC_ALLOC) == 0)
485 /* If the section offset is 0, either the section has not been placed
486 yet, or it was the lowest section placed (in which case LOWEST
487 will be past its end). */
488 if (offsets[indx] == 0)
491 /* If this section would overlap us, then we must move up. */
492 if (start_addr + bfd_get_section_size (sect) > offsets[indx]
493 && start_addr < offsets[indx] + bfd_get_section_size (cur_sec))
495 start_addr = offsets[indx] + bfd_get_section_size (cur_sec);
496 start_addr = (start_addr + align - 1) & -align;
501 /* Otherwise, we appear to be OK. So far. */
506 offsets[sect->index] = start_addr;
507 arg->lowest = start_addr + bfd_get_section_size (sect);
510 /* Store struct section_addr_info as prepared (made relative and with SECTINDEX
511 filled-in) by addr_info_make_relative into SECTION_OFFSETS of NUM_SECTIONS
515 relative_addr_info_to_section_offsets (struct section_offsets *section_offsets,
517 struct section_addr_info *addrs)
521 memset (section_offsets, 0, SIZEOF_N_SECTION_OFFSETS (num_sections));
523 /* Now calculate offsets for section that were specified by the caller. */
524 for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++)
526 struct other_sections *osp;
528 osp = &addrs->other[i];
529 if (osp->sectindex == -1)
532 /* Record all sections in offsets. */
533 /* The section_offsets in the objfile are here filled in using
535 section_offsets->offsets[osp->sectindex] = osp->addr;
539 /* Transform section name S for a name comparison. prelink can split section
540 `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly
541 prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address
542 of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss'
543 (`.sbss') section has invalid (increased) virtual address. */
546 addr_section_name (const char *s)
548 if (strcmp (s, ".dynbss") == 0)
550 if (strcmp (s, ".sdynbss") == 0)
556 /* qsort comparator for addrs_section_sort. Sort entries in ascending order by
557 their (name, sectindex) pair. sectindex makes the sort by name stable. */
560 addrs_section_compar (const void *ap, const void *bp)
562 const struct other_sections *a = *((struct other_sections **) ap);
563 const struct other_sections *b = *((struct other_sections **) bp);
564 int retval, a_idx, b_idx;
566 retval = strcmp (addr_section_name (a->name), addr_section_name (b->name));
570 return a->sectindex - b->sectindex;
573 /* Provide sorted array of pointers to sections of ADDRS. The array is
574 terminated by NULL. Caller is responsible to call xfree for it. */
576 static struct other_sections **
577 addrs_section_sort (struct section_addr_info *addrs)
579 struct other_sections **array;
582 /* `+ 1' for the NULL terminator. */
583 array = xmalloc (sizeof (*array) * (addrs->num_sections + 1));
584 for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++)
585 array[i] = &addrs->other[i];
588 qsort (array, i, sizeof (*array), addrs_section_compar);
593 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
594 also SECTINDEXes specific to ABFD there. This function can be used to
595 rebase ADDRS to start referencing different BFD than before. */
598 addr_info_make_relative (struct section_addr_info *addrs, bfd *abfd)
600 asection *lower_sect;
601 CORE_ADDR lower_offset;
603 struct cleanup *my_cleanup;
604 struct section_addr_info *abfd_addrs;
605 struct other_sections **addrs_sorted, **abfd_addrs_sorted;
606 struct other_sections **addrs_to_abfd_addrs;
608 /* Find lowest loadable section to be used as starting point for
609 continguous sections. */
611 bfd_map_over_sections (abfd, find_lowest_section, &lower_sect);
612 if (lower_sect == NULL)
614 warning (_("no loadable sections found in added symbol-file %s"),
615 bfd_get_filename (abfd));
619 lower_offset = bfd_section_vma (bfd_get_filename (abfd), lower_sect);
621 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
622 in ABFD. Section names are not unique - there can be multiple sections of
623 the same name. Also the sections of the same name do not have to be
624 adjacent to each other. Some sections may be present only in one of the
625 files. Even sections present in both files do not have to be in the same
628 Use stable sort by name for the sections in both files. Then linearly
629 scan both lists matching as most of the entries as possible. */
631 addrs_sorted = addrs_section_sort (addrs);
632 my_cleanup = make_cleanup (xfree, addrs_sorted);
634 abfd_addrs = build_section_addr_info_from_bfd (abfd);
635 make_cleanup_free_section_addr_info (abfd_addrs);
636 abfd_addrs_sorted = addrs_section_sort (abfd_addrs);
637 make_cleanup (xfree, abfd_addrs_sorted);
639 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and
640 ABFD_ADDRS_SORTED. */
642 addrs_to_abfd_addrs = xzalloc (sizeof (*addrs_to_abfd_addrs)
643 * addrs->num_sections);
644 make_cleanup (xfree, addrs_to_abfd_addrs);
646 while (*addrs_sorted)
648 const char *sect_name = addr_section_name ((*addrs_sorted)->name);
650 while (*abfd_addrs_sorted
651 && strcmp (addr_section_name ((*abfd_addrs_sorted)->name),
655 if (*abfd_addrs_sorted
656 && strcmp (addr_section_name ((*abfd_addrs_sorted)->name),
661 /* Make the found item directly addressable from ADDRS. */
662 index_in_addrs = *addrs_sorted - addrs->other;
663 gdb_assert (addrs_to_abfd_addrs[index_in_addrs] == NULL);
664 addrs_to_abfd_addrs[index_in_addrs] = *abfd_addrs_sorted;
666 /* Never use the same ABFD entry twice. */
673 /* Calculate offsets for the loadable sections.
674 FIXME! Sections must be in order of increasing loadable section
675 so that contiguous sections can use the lower-offset!!!
677 Adjust offsets if the segments are not contiguous.
678 If the section is contiguous, its offset should be set to
679 the offset of the highest loadable section lower than it
680 (the loadable section directly below it in memory).
681 this_offset = lower_offset = lower_addr - lower_orig_addr */
683 for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++)
685 struct other_sections *sect = addrs_to_abfd_addrs[i];
689 /* This is the index used by BFD. */
690 addrs->other[i].sectindex = sect->sectindex;
692 if (addrs->other[i].addr != 0)
694 addrs->other[i].addr -= sect->addr;
695 lower_offset = addrs->other[i].addr;
698 addrs->other[i].addr = lower_offset;
702 /* addr_section_name transformation is not used for SECT_NAME. */
703 const char *sect_name = addrs->other[i].name;
705 /* This section does not exist in ABFD, which is normally
706 unexpected and we want to issue a warning.
708 However, the ELF prelinker does create a few sections which are
709 marked in the main executable as loadable (they are loaded in
710 memory from the DYNAMIC segment) and yet are not present in
711 separate debug info files. This is fine, and should not cause
712 a warning. Shared libraries contain just the section
713 ".gnu.liblist" but it is not marked as loadable there. There is
714 no other way to identify them than by their name as the sections
715 created by prelink have no special flags.
717 For the sections `.bss' and `.sbss' see addr_section_name. */
719 if (!(strcmp (sect_name, ".gnu.liblist") == 0
720 || strcmp (sect_name, ".gnu.conflict") == 0
721 || (strcmp (sect_name, ".bss") == 0
723 && strcmp (addrs->other[i - 1].name, ".dynbss") == 0
724 && addrs_to_abfd_addrs[i - 1] != NULL)
725 || (strcmp (sect_name, ".sbss") == 0
727 && strcmp (addrs->other[i - 1].name, ".sdynbss") == 0
728 && addrs_to_abfd_addrs[i - 1] != NULL)))
729 warning (_("section %s not found in %s"), sect_name,
730 bfd_get_filename (abfd));
732 addrs->other[i].addr = 0;
733 addrs->other[i].sectindex = -1;
737 do_cleanups (my_cleanup);
740 /* Parse the user's idea of an offset for dynamic linking, into our idea
741 of how to represent it for fast symbol reading. This is the default
742 version of the sym_fns.sym_offsets function for symbol readers that
743 don't need to do anything special. It allocates a section_offsets table
744 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
747 default_symfile_offsets (struct objfile *objfile,
748 struct section_addr_info *addrs)
750 objfile->num_sections = bfd_count_sections (objfile->obfd);
751 objfile->section_offsets = (struct section_offsets *)
752 obstack_alloc (&objfile->objfile_obstack,
753 SIZEOF_N_SECTION_OFFSETS (objfile->num_sections));
754 relative_addr_info_to_section_offsets (objfile->section_offsets,
755 objfile->num_sections, addrs);
757 /* For relocatable files, all loadable sections will start at zero.
758 The zero is meaningless, so try to pick arbitrary addresses such
759 that no loadable sections overlap. This algorithm is quadratic,
760 but the number of sections in a single object file is generally
762 if ((bfd_get_file_flags (objfile->obfd) & (EXEC_P | DYNAMIC)) == 0)
764 struct place_section_arg arg;
765 bfd *abfd = objfile->obfd;
768 for (cur_sec = abfd->sections; cur_sec != NULL; cur_sec = cur_sec->next)
769 /* We do not expect this to happen; just skip this step if the
770 relocatable file has a section with an assigned VMA. */
771 if (bfd_section_vma (abfd, cur_sec) != 0)
776 CORE_ADDR *offsets = objfile->section_offsets->offsets;
778 /* Pick non-overlapping offsets for sections the user did not
780 arg.offsets = objfile->section_offsets;
782 bfd_map_over_sections (objfile->obfd, place_section, &arg);
784 /* Correctly filling in the section offsets is not quite
785 enough. Relocatable files have two properties that
786 (most) shared objects do not:
788 - Their debug information will contain relocations. Some
789 shared libraries do also, but many do not, so this can not
792 - If there are multiple code sections they will be loaded
793 at different relative addresses in memory than they are
794 in the objfile, since all sections in the file will start
797 Because GDB has very limited ability to map from an
798 address in debug info to the correct code section,
799 it relies on adding SECT_OFF_TEXT to things which might be
800 code. If we clear all the section offsets, and set the
801 section VMAs instead, then symfile_relocate_debug_section
802 will return meaningful debug information pointing at the
805 GDB has too many different data structures for section
806 addresses - a bfd, objfile, and so_list all have section
807 tables, as does exec_ops. Some of these could probably
810 for (cur_sec = abfd->sections; cur_sec != NULL;
811 cur_sec = cur_sec->next)
813 if ((bfd_get_section_flags (abfd, cur_sec) & SEC_ALLOC) == 0)
816 bfd_set_section_vma (abfd, cur_sec, offsets[cur_sec->index]);
817 exec_set_section_address (bfd_get_filename (abfd),
819 offsets[cur_sec->index]);
820 offsets[cur_sec->index] = 0;
825 /* Remember the bfd indexes for the .text, .data, .bss and
827 init_objfile_sect_indices (objfile);
831 /* Divide the file into segments, which are individual relocatable units.
832 This is the default version of the sym_fns.sym_segments function for
833 symbol readers that do not have an explicit representation of segments.
834 It assumes that object files do not have segments, and fully linked
835 files have a single segment. */
837 struct symfile_segment_data *
838 default_symfile_segments (bfd *abfd)
842 struct symfile_segment_data *data;
845 /* Relocatable files contain enough information to position each
846 loadable section independently; they should not be relocated
848 if ((bfd_get_file_flags (abfd) & (EXEC_P | DYNAMIC)) == 0)
851 /* Make sure there is at least one loadable section in the file. */
852 for (sect = abfd->sections; sect != NULL; sect = sect->next)
854 if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0)
862 low = bfd_get_section_vma (abfd, sect);
863 high = low + bfd_get_section_size (sect);
865 data = XZALLOC (struct symfile_segment_data);
866 data->num_segments = 1;
867 data->segment_bases = XCALLOC (1, CORE_ADDR);
868 data->segment_sizes = XCALLOC (1, CORE_ADDR);
870 num_sections = bfd_count_sections (abfd);
871 data->segment_info = XCALLOC (num_sections, int);
873 for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next)
877 if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0)
880 vma = bfd_get_section_vma (abfd, sect);
883 if (vma + bfd_get_section_size (sect) > high)
884 high = vma + bfd_get_section_size (sect);
886 data->segment_info[i] = 1;
889 data->segment_bases[0] = low;
890 data->segment_sizes[0] = high - low;
895 /* Process a symbol file, as either the main file or as a dynamically
898 OBJFILE is where the symbols are to be read from.
900 ADDRS is the list of section load addresses. If the user has given
901 an 'add-symbol-file' command, then this is the list of offsets and
902 addresses he or she provided as arguments to the command; or, if
903 we're handling a shared library, these are the actual addresses the
904 sections are loaded at, according to the inferior's dynamic linker
905 (as gleaned by GDB's shared library code). We convert each address
906 into an offset from the section VMA's as it appears in the object
907 file, and then call the file's sym_offsets function to convert this
908 into a format-specific offset table --- a `struct section_offsets'.
909 If ADDRS is non-zero, OFFSETS must be zero.
911 OFFSETS is a table of section offsets already in the right
912 format-specific representation. NUM_OFFSETS is the number of
913 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
914 assume this is the proper table the call to sym_offsets described
915 above would produce. Instead of calling sym_offsets, we just dump
916 it right into objfile->section_offsets. (When we're re-reading
917 symbols from an objfile, we don't have the original load address
918 list any more; all we have is the section offset table.) If
919 OFFSETS is non-zero, ADDRS must be zero.
921 ADD_FLAGS encodes verbosity level, whether this is main symbol or
922 an extra symbol file such as dynamically loaded code, and wether
923 breakpoint reset should be deferred. */
926 syms_from_objfile (struct objfile *objfile,
927 struct section_addr_info *addrs,
928 struct section_offsets *offsets,
932 struct section_addr_info *local_addr = NULL;
933 struct cleanup *old_chain;
934 const int mainline = add_flags & SYMFILE_MAINLINE;
936 gdb_assert (! (addrs && offsets));
938 init_entry_point_info (objfile);
939 objfile->sf = find_sym_fns (objfile->obfd);
941 if (objfile->sf == NULL)
942 return; /* No symbols. */
944 /* Make sure that partially constructed symbol tables will be cleaned up
945 if an error occurs during symbol reading. */
946 old_chain = make_cleanup_free_objfile (objfile);
948 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
949 list. We now establish the convention that an addr of zero means
950 no load address was specified. */
951 if (! addrs && ! offsets)
954 = alloc_section_addr_info (bfd_count_sections (objfile->obfd));
955 make_cleanup (xfree, local_addr);
959 /* Now either addrs or offsets is non-zero. */
963 /* We will modify the main symbol table, make sure that all its users
964 will be cleaned up if an error occurs during symbol reading. */
965 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
967 /* Since no error yet, throw away the old symbol table. */
969 if (symfile_objfile != NULL)
971 free_objfile (symfile_objfile);
972 gdb_assert (symfile_objfile == NULL);
975 /* Currently we keep symbols from the add-symbol-file command.
976 If the user wants to get rid of them, they should do "symbol-file"
977 without arguments first. Not sure this is the best behavior
980 (*objfile->sf->sym_new_init) (objfile);
983 /* Convert addr into an offset rather than an absolute address.
984 We find the lowest address of a loaded segment in the objfile,
985 and assume that <addr> is where that got loaded.
987 We no longer warn if the lowest section is not a text segment (as
988 happens for the PA64 port. */
989 if (addrs && addrs->other[0].name)
990 addr_info_make_relative (addrs, objfile->obfd);
992 /* Initialize symbol reading routines for this objfile, allow complaints to
993 appear for this new file, and record how verbose to be, then do the
994 initial symbol reading for this file. */
996 (*objfile->sf->sym_init) (objfile);
997 clear_complaints (&symfile_complaints, 1, add_flags & SYMFILE_VERBOSE);
1000 (*objfile->sf->sym_offsets) (objfile, addrs);
1003 size_t size = SIZEOF_N_SECTION_OFFSETS (num_offsets);
1005 /* Just copy in the offset table directly as given to us. */
1006 objfile->num_sections = num_offsets;
1007 objfile->section_offsets
1008 = ((struct section_offsets *)
1009 obstack_alloc (&objfile->objfile_obstack, size));
1010 memcpy (objfile->section_offsets, offsets, size);
1012 init_objfile_sect_indices (objfile);
1015 (*objfile->sf->sym_read) (objfile, add_flags);
1017 if ((add_flags & SYMFILE_NO_READ) == 0)
1018 require_partial_symbols (objfile, 0);
1020 /* Discard cleanups as symbol reading was successful. */
1022 discard_cleanups (old_chain);
1026 /* Perform required actions after either reading in the initial
1027 symbols for a new objfile, or mapping in the symbols from a reusable
1028 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
1031 new_symfile_objfile (struct objfile *objfile, int add_flags)
1033 /* If this is the main symbol file we have to clean up all users of the
1034 old main symbol file. Otherwise it is sufficient to fixup all the
1035 breakpoints that may have been redefined by this symbol file. */
1036 if (add_flags & SYMFILE_MAINLINE)
1038 /* OK, make it the "real" symbol file. */
1039 symfile_objfile = objfile;
1041 clear_symtab_users (add_flags);
1043 else if ((add_flags & SYMFILE_DEFER_BP_RESET) == 0)
1045 breakpoint_re_set ();
1048 /* We're done reading the symbol file; finish off complaints. */
1049 clear_complaints (&symfile_complaints, 0, add_flags & SYMFILE_VERBOSE);
1052 /* Process a symbol file, as either the main file or as a dynamically
1055 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1056 This BFD will be closed on error, and is always consumed by this function.
1058 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1059 extra, such as dynamically loaded code, and what to do with breakpoins.
1061 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
1062 syms_from_objfile, above.
1063 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1065 PARENT is the original objfile if ABFD is a separate debug info file.
1066 Otherwise PARENT is NULL.
1068 Upon success, returns a pointer to the objfile that was added.
1069 Upon failure, jumps back to command level (never returns). */
1071 static struct objfile *
1072 symbol_file_add_with_addrs_or_offsets (bfd *abfd,
1074 struct section_addr_info *addrs,
1075 struct section_offsets *offsets,
1077 int flags, struct objfile *parent)
1079 struct objfile *objfile;
1080 struct cleanup *my_cleanups;
1081 const char *name = bfd_get_filename (abfd);
1082 const int from_tty = add_flags & SYMFILE_VERBOSE;
1083 const int mainline = add_flags & SYMFILE_MAINLINE;
1084 const int should_print = ((from_tty || info_verbose)
1085 && (readnow_symbol_files
1086 || (add_flags & SYMFILE_NO_READ) == 0));
1088 if (readnow_symbol_files)
1090 flags |= OBJF_READNOW;
1091 add_flags &= ~SYMFILE_NO_READ;
1094 my_cleanups = make_cleanup_bfd_close (abfd);
1096 /* Give user a chance to burp if we'd be
1097 interactively wiping out any existing symbols. */
1099 if ((have_full_symbols () || have_partial_symbols ())
1102 && !query (_("Load new symbol table from \"%s\"? "), name))
1103 error (_("Not confirmed."));
1105 objfile = allocate_objfile (abfd, flags | (mainline ? OBJF_MAINLINE : 0));
1106 discard_cleanups (my_cleanups);
1109 add_separate_debug_objfile (objfile, parent);
1111 /* We either created a new mapped symbol table, mapped an existing
1112 symbol table file which has not had initial symbol reading
1113 performed, or need to read an unmapped symbol table. */
1116 if (deprecated_pre_add_symbol_hook)
1117 deprecated_pre_add_symbol_hook (name);
1120 printf_unfiltered (_("Reading symbols from %s..."), name);
1122 gdb_flush (gdb_stdout);
1125 syms_from_objfile (objfile, addrs, offsets, num_offsets,
1128 /* We now have at least a partial symbol table. Check to see if the
1129 user requested that all symbols be read on initial access via either
1130 the gdb startup command line or on a per symbol file basis. Expand
1131 all partial symbol tables for this objfile if so. */
1133 if ((flags & OBJF_READNOW))
1137 printf_unfiltered (_("expanding to full symbols..."));
1139 gdb_flush (gdb_stdout);
1143 objfile->sf->qf->expand_all_symtabs (objfile);
1146 if (should_print && !objfile_has_symbols (objfile))
1149 printf_unfiltered (_("(no debugging symbols found)..."));
1155 if (deprecated_post_add_symbol_hook)
1156 deprecated_post_add_symbol_hook ();
1158 printf_unfiltered (_("done.\n"));
1161 /* We print some messages regardless of whether 'from_tty ||
1162 info_verbose' is true, so make sure they go out at the right
1164 gdb_flush (gdb_stdout);
1166 if (objfile->sf == NULL)
1168 observer_notify_new_objfile (objfile);
1169 return objfile; /* No symbols. */
1172 new_symfile_objfile (objfile, add_flags);
1174 observer_notify_new_objfile (objfile);
1176 bfd_cache_close_all ();
1180 /* Add BFD as a separate debug file for OBJFILE. */
1183 symbol_file_add_separate (bfd *bfd, int symfile_flags, struct objfile *objfile)
1185 struct objfile *new_objfile;
1186 struct section_addr_info *sap;
1187 struct cleanup *my_cleanup;
1189 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1190 because sections of BFD may not match sections of OBJFILE and because
1191 vma may have been modified by tools such as prelink. */
1192 sap = build_section_addr_info_from_objfile (objfile);
1193 my_cleanup = make_cleanup_free_section_addr_info (sap);
1195 new_objfile = symbol_file_add_with_addrs_or_offsets
1196 (bfd, symfile_flags,
1198 objfile->flags & (OBJF_REORDERED | OBJF_SHARED | OBJF_READNOW
1202 do_cleanups (my_cleanup);
1205 /* Process the symbol file ABFD, as either the main file or as a
1206 dynamically loaded file.
1208 See symbol_file_add_with_addrs_or_offsets's comments for
1211 symbol_file_add_from_bfd (bfd *abfd, int add_flags,
1212 struct section_addr_info *addrs,
1213 int flags, struct objfile *parent)
1215 return symbol_file_add_with_addrs_or_offsets (abfd, add_flags, addrs, 0, 0,
1220 /* Process a symbol file, as either the main file or as a dynamically
1221 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
1224 symbol_file_add (char *name, int add_flags, struct section_addr_info *addrs,
1227 return symbol_file_add_from_bfd (symfile_bfd_open (name), add_flags, addrs,
1232 /* Call symbol_file_add() with default values and update whatever is
1233 affected by the loading of a new main().
1234 Used when the file is supplied in the gdb command line
1235 and by some targets with special loading requirements.
1236 The auxiliary function, symbol_file_add_main_1(), has the flags
1237 argument for the switches that can only be specified in the symbol_file
1241 symbol_file_add_main (char *args, int from_tty)
1243 symbol_file_add_main_1 (args, from_tty, 0);
1247 symbol_file_add_main_1 (char *args, int from_tty, int flags)
1249 const int add_flags = SYMFILE_MAINLINE | (from_tty ? SYMFILE_VERBOSE : 0);
1250 symbol_file_add (args, add_flags, NULL, flags);
1252 /* Getting new symbols may change our opinion about
1253 what is frameless. */
1254 reinit_frame_cache ();
1256 set_initial_language ();
1260 symbol_file_clear (int from_tty)
1262 if ((have_full_symbols () || have_partial_symbols ())
1265 ? !query (_("Discard symbol table from `%s'? "),
1266 symfile_objfile->name)
1267 : !query (_("Discard symbol table? "))))
1268 error (_("Not confirmed."));
1270 /* solib descriptors may have handles to objfiles. Wipe them before their
1271 objfiles get stale by free_all_objfiles. */
1272 no_shared_libraries (NULL, from_tty);
1274 free_all_objfiles ();
1276 gdb_assert (symfile_objfile == NULL);
1278 printf_unfiltered (_("No symbol file now.\n"));
1282 get_debug_link_info (struct objfile *objfile, unsigned long *crc32_out)
1285 bfd_size_type debuglink_size;
1286 unsigned long crc32;
1290 sect = bfd_get_section_by_name (objfile->obfd, ".gnu_debuglink");
1295 debuglink_size = bfd_section_size (objfile->obfd, sect);
1297 contents = xmalloc (debuglink_size);
1298 bfd_get_section_contents (objfile->obfd, sect, contents,
1299 (file_ptr)0, (bfd_size_type)debuglink_size);
1301 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1302 crc_offset = strlen (contents) + 1;
1303 crc_offset = (crc_offset + 3) & ~3;
1305 crc32 = bfd_get_32 (objfile->obfd, (bfd_byte *) (contents + crc_offset));
1311 /* Return 32-bit CRC for ABFD. If successful store it to *FILE_CRC_RETURN and
1312 return 1. Otherwise print a warning and return 0. ABFD seek position is
1316 get_file_crc (bfd *abfd, unsigned long *file_crc_return)
1318 unsigned long file_crc = 0;
1320 if (bfd_seek (abfd, 0, SEEK_SET) != 0)
1322 warning (_("Problem reading \"%s\" for CRC: %s"),
1323 bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
1329 gdb_byte buffer[8 * 1024];
1330 bfd_size_type count;
1332 count = bfd_bread (buffer, sizeof (buffer), abfd);
1333 if (count == (bfd_size_type) -1)
1335 warning (_("Problem reading \"%s\" for CRC: %s"),
1336 bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
1341 file_crc = gnu_debuglink_crc32 (file_crc, buffer, count);
1344 *file_crc_return = file_crc;
1349 separate_debug_file_exists (const char *name, unsigned long crc,
1350 struct objfile *parent_objfile)
1352 unsigned long file_crc;
1355 struct stat parent_stat, abfd_stat;
1356 int verified_as_different;
1358 /* Find a separate debug info file as if symbols would be present in
1359 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1360 section can contain just the basename of PARENT_OBJFILE without any
1361 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1362 the separate debug infos with the same basename can exist. */
1364 if (filename_cmp (name, parent_objfile->name) == 0)
1367 abfd = bfd_open_maybe_remote (name);
1372 /* Verify symlinks were not the cause of filename_cmp name difference above.
1374 Some operating systems, e.g. Windows, do not provide a meaningful
1375 st_ino; they always set it to zero. (Windows does provide a
1376 meaningful st_dev.) Do not indicate a duplicate library in that
1377 case. While there is no guarantee that a system that provides
1378 meaningful inode numbers will never set st_ino to zero, this is
1379 merely an optimization, so we do not need to worry about false
1382 if (bfd_stat (abfd, &abfd_stat) == 0
1383 && abfd_stat.st_ino != 0
1384 && bfd_stat (parent_objfile->obfd, &parent_stat) == 0)
1386 if (abfd_stat.st_dev == parent_stat.st_dev
1387 && abfd_stat.st_ino == parent_stat.st_ino)
1392 verified_as_different = 1;
1395 verified_as_different = 0;
1397 file_crc_p = get_file_crc (abfd, &file_crc);
1404 if (crc != file_crc)
1406 /* If one (or both) the files are accessed for example the via "remote:"
1407 gdbserver way it does not support the bfd_stat operation. Verify
1408 whether those two files are not the same manually. */
1410 if (!verified_as_different && !parent_objfile->crc32_p)
1412 parent_objfile->crc32_p = get_file_crc (parent_objfile->obfd,
1413 &parent_objfile->crc32);
1414 if (!parent_objfile->crc32_p)
1418 if (verified_as_different || parent_objfile->crc32 != file_crc)
1419 warning (_("the debug information found in \"%s\""
1420 " does not match \"%s\" (CRC mismatch).\n"),
1421 name, parent_objfile->name);
1429 char *debug_file_directory = NULL;
1431 show_debug_file_directory (struct ui_file *file, int from_tty,
1432 struct cmd_list_element *c, const char *value)
1434 fprintf_filtered (file,
1435 _("The directory where separate debug "
1436 "symbols are searched for is \"%s\".\n"),
1440 #if ! defined (DEBUG_SUBDIRECTORY)
1441 #define DEBUG_SUBDIRECTORY ".debug"
1444 /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
1445 where the original file resides (may not be the same as
1446 dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are
1447 looking for. Returns the name of the debuginfo, of NULL. */
1450 find_separate_debug_file (const char *dir,
1451 const char *canon_dir,
1452 const char *debuglink,
1453 unsigned long crc32, struct objfile *objfile)
1459 /* Set I to max (strlen (canon_dir), strlen (dir)). */
1461 if (canon_dir != NULL && strlen (canon_dir) > i)
1462 i = strlen (canon_dir);
1464 debugfile = xmalloc (strlen (debug_file_directory) + 1
1466 + strlen (DEBUG_SUBDIRECTORY)
1468 + strlen (debuglink)
1471 /* First try in the same directory as the original file. */
1472 strcpy (debugfile, dir);
1473 strcat (debugfile, debuglink);
1475 if (separate_debug_file_exists (debugfile, crc32, objfile))
1478 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1479 strcpy (debugfile, dir);
1480 strcat (debugfile, DEBUG_SUBDIRECTORY);
1481 strcat (debugfile, "/");
1482 strcat (debugfile, debuglink);
1484 if (separate_debug_file_exists (debugfile, crc32, objfile))
1487 /* Then try in the global debugfile directories.
1489 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1490 cause "/..." lookups. */
1492 debugdir = debug_file_directory;
1497 while (*debugdir == DIRNAME_SEPARATOR)
1500 debugdir_end = strchr (debugdir, DIRNAME_SEPARATOR);
1501 if (debugdir_end == NULL)
1502 debugdir_end = &debugdir[strlen (debugdir)];
1504 memcpy (debugfile, debugdir, debugdir_end - debugdir);
1505 debugfile[debugdir_end - debugdir] = 0;
1506 strcat (debugfile, "/");
1507 strcat (debugfile, dir);
1508 strcat (debugfile, debuglink);
1510 if (separate_debug_file_exists (debugfile, crc32, objfile))
1513 /* If the file is in the sysroot, try using its base path in the
1514 global debugfile directory. */
1515 if (canon_dir != NULL
1516 && filename_ncmp (canon_dir, gdb_sysroot,
1517 strlen (gdb_sysroot)) == 0
1518 && IS_DIR_SEPARATOR (canon_dir[strlen (gdb_sysroot)]))
1520 memcpy (debugfile, debugdir, debugdir_end - debugdir);
1521 debugfile[debugdir_end - debugdir] = 0;
1522 strcat (debugfile, canon_dir + strlen (gdb_sysroot));
1523 strcat (debugfile, "/");
1524 strcat (debugfile, debuglink);
1526 if (separate_debug_file_exists (debugfile, crc32, objfile))
1530 debugdir = debugdir_end;
1532 while (*debugdir != 0);
1538 /* Modify PATH to contain only "directory/" part of PATH.
1539 If there were no directory separators in PATH, PATH will be empty
1540 string on return. */
1543 terminate_after_last_dir_separator (char *path)
1547 /* Strip off the final filename part, leaving the directory name,
1548 followed by a slash. The directory can be relative or absolute. */
1549 for (i = strlen(path) - 1; i >= 0; i--)
1550 if (IS_DIR_SEPARATOR (path[i]))
1553 /* If I is -1 then no directory is present there and DIR will be "". */
1557 /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section).
1558 Returns pathname, or NULL. */
1561 find_separate_debug_file_by_debuglink (struct objfile *objfile)
1564 char *dir, *canon_dir;
1566 unsigned long crc32;
1567 struct cleanup *cleanups;
1569 debuglink = get_debug_link_info (objfile, &crc32);
1571 if (debuglink == NULL)
1573 /* There's no separate debug info, hence there's no way we could
1574 load it => no warning. */
1578 dir = xstrdup (objfile->name);
1579 cleanups = make_cleanup (xfree, dir);
1580 terminate_after_last_dir_separator (dir);
1581 canon_dir = lrealpath (dir);
1583 debugfile = find_separate_debug_file (dir, canon_dir, debuglink,
1587 if (debugfile == NULL)
1590 /* For PR gdb/9538, try again with realpath (if different from the
1595 if (lstat (objfile->name, &st_buf) == 0 && S_ISLNK(st_buf.st_mode))
1599 symlink_dir = lrealpath (objfile->name);
1600 if (symlink_dir != NULL)
1602 make_cleanup (xfree, symlink_dir);
1603 terminate_after_last_dir_separator (symlink_dir);
1604 if (strcmp (dir, symlink_dir) != 0)
1606 /* Different directory, so try using it. */
1607 debugfile = find_separate_debug_file (symlink_dir,
1615 #endif /* HAVE_LSTAT */
1618 do_cleanups (cleanups);
1623 /* This is the symbol-file command. Read the file, analyze its
1624 symbols, and add a struct symtab to a symtab list. The syntax of
1625 the command is rather bizarre:
1627 1. The function buildargv implements various quoting conventions
1628 which are undocumented and have little or nothing in common with
1629 the way things are quoted (or not quoted) elsewhere in GDB.
1631 2. Options are used, which are not generally used in GDB (perhaps
1632 "set mapped on", "set readnow on" would be better)
1634 3. The order of options matters, which is contrary to GNU
1635 conventions (because it is confusing and inconvenient). */
1638 symbol_file_command (char *args, int from_tty)
1644 symbol_file_clear (from_tty);
1648 char **argv = gdb_buildargv (args);
1649 int flags = OBJF_USERLOADED;
1650 struct cleanup *cleanups;
1653 cleanups = make_cleanup_freeargv (argv);
1654 while (*argv != NULL)
1656 if (strcmp (*argv, "-readnow") == 0)
1657 flags |= OBJF_READNOW;
1658 else if (**argv == '-')
1659 error (_("unknown option `%s'"), *argv);
1662 symbol_file_add_main_1 (*argv, from_tty, flags);
1670 error (_("no symbol file name was specified"));
1672 do_cleanups (cleanups);
1676 /* Set the initial language.
1678 FIXME: A better solution would be to record the language in the
1679 psymtab when reading partial symbols, and then use it (if known) to
1680 set the language. This would be a win for formats that encode the
1681 language in an easily discoverable place, such as DWARF. For
1682 stabs, we can jump through hoops looking for specially named
1683 symbols or try to intuit the language from the specific type of
1684 stabs we find, but we can't do that until later when we read in
1688 set_initial_language (void)
1690 enum language lang = language_unknown;
1692 if (language_of_main != language_unknown)
1693 lang = language_of_main;
1696 const char *filename;
1698 filename = find_main_filename ();
1699 if (filename != NULL)
1700 lang = deduce_language_from_filename (filename);
1703 if (lang == language_unknown)
1705 /* Make C the default language */
1709 set_language (lang);
1710 expected_language = current_language; /* Don't warn the user. */
1713 /* If NAME is a remote name open the file using remote protocol, otherwise
1714 open it normally. */
1717 bfd_open_maybe_remote (const char *name)
1719 if (remote_filename_p (name))
1720 return remote_bfd_open (name, gnutarget);
1722 return bfd_openr (name, gnutarget);
1726 /* Open the file specified by NAME and hand it off to BFD for
1727 preliminary analysis. Return a newly initialized bfd *, which
1728 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1729 absolute). In case of trouble, error() is called. */
1732 symfile_bfd_open (char *name)
1736 char *absolute_name;
1738 if (remote_filename_p (name))
1740 name = xstrdup (name);
1741 sym_bfd = remote_bfd_open (name, gnutarget);
1744 make_cleanup (xfree, name);
1745 error (_("`%s': can't open to read symbols: %s."), name,
1746 bfd_errmsg (bfd_get_error ()));
1749 if (!bfd_check_format (sym_bfd, bfd_object))
1751 bfd_close (sym_bfd);
1752 make_cleanup (xfree, name);
1753 error (_("`%s': can't read symbols: %s."), name,
1754 bfd_errmsg (bfd_get_error ()));
1760 name = tilde_expand (name); /* Returns 1st new malloc'd copy. */
1762 /* Look down path for it, allocate 2nd new malloc'd copy. */
1763 desc = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, name,
1764 O_RDONLY | O_BINARY, &absolute_name);
1765 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1768 char *exename = alloca (strlen (name) + 5);
1770 strcat (strcpy (exename, name), ".exe");
1771 desc = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, exename,
1772 O_RDONLY | O_BINARY, &absolute_name);
1777 make_cleanup (xfree, name);
1778 perror_with_name (name);
1781 /* Free 1st new malloc'd copy, but keep the 2nd malloc'd copy in
1782 bfd. It'll be freed in free_objfile(). */
1784 name = absolute_name;
1786 sym_bfd = bfd_fopen (name, gnutarget, FOPEN_RB, desc);
1790 make_cleanup (xfree, name);
1791 error (_("`%s': can't open to read symbols: %s."), name,
1792 bfd_errmsg (bfd_get_error ()));
1794 bfd_set_cacheable (sym_bfd, 1);
1796 if (!bfd_check_format (sym_bfd, bfd_object))
1798 /* FIXME: should be checking for errors from bfd_close (for one
1799 thing, on error it does not free all the storage associated
1801 bfd_close (sym_bfd); /* This also closes desc. */
1802 make_cleanup (xfree, name);
1803 error (_("`%s': can't read symbols: %s."), name,
1804 bfd_errmsg (bfd_get_error ()));
1807 /* bfd_usrdata exists for applications and libbfd must not touch it. */
1808 gdb_assert (bfd_usrdata (sym_bfd) == NULL);
1813 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1814 the section was not found. */
1817 get_section_index (struct objfile *objfile, char *section_name)
1819 asection *sect = bfd_get_section_by_name (objfile->obfd, section_name);
1827 /* Link SF into the global symtab_fns list. Called on startup by the
1828 _initialize routine in each object file format reader, to register
1829 information about each format the reader is prepared to handle. */
1832 add_symtab_fns (const struct sym_fns *sf)
1834 VEC_safe_push (sym_fns_ptr, symtab_fns, sf);
1837 /* Initialize OBJFILE to read symbols from its associated BFD. It
1838 either returns or calls error(). The result is an initialized
1839 struct sym_fns in the objfile structure, that contains cached
1840 information about the symbol file. */
1842 static const struct sym_fns *
1843 find_sym_fns (bfd *abfd)
1845 const struct sym_fns *sf;
1846 enum bfd_flavour our_flavour = bfd_get_flavour (abfd);
1849 if (our_flavour == bfd_target_srec_flavour
1850 || our_flavour == bfd_target_ihex_flavour
1851 || our_flavour == bfd_target_tekhex_flavour)
1852 return NULL; /* No symbols. */
1854 for (i = 0; VEC_iterate (sym_fns_ptr, symtab_fns, i, sf); ++i)
1855 if (our_flavour == sf->sym_flavour)
1858 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1859 bfd_get_target (abfd));
1863 /* This function runs the load command of our current target. */
1866 load_command (char *arg, int from_tty)
1870 /* The user might be reloading because the binary has changed. Take
1871 this opportunity to check. */
1872 reopen_exec_file ();
1880 parg = arg = get_exec_file (1);
1882 /* Count how many \ " ' tab space there are in the name. */
1883 while ((parg = strpbrk (parg, "\\\"'\t ")))
1891 /* We need to quote this string so buildargv can pull it apart. */
1892 char *temp = xmalloc (strlen (arg) + count + 1 );
1896 make_cleanup (xfree, temp);
1899 while ((parg = strpbrk (parg, "\\\"'\t ")))
1901 strncpy (ptemp, prev, parg - prev);
1902 ptemp += parg - prev;
1906 strcpy (ptemp, prev);
1912 target_load (arg, from_tty);
1914 /* After re-loading the executable, we don't really know which
1915 overlays are mapped any more. */
1916 overlay_cache_invalid = 1;
1919 /* This version of "load" should be usable for any target. Currently
1920 it is just used for remote targets, not inftarg.c or core files,
1921 on the theory that only in that case is it useful.
1923 Avoiding xmodem and the like seems like a win (a) because we don't have
1924 to worry about finding it, and (b) On VMS, fork() is very slow and so
1925 we don't want to run a subprocess. On the other hand, I'm not sure how
1926 performance compares. */
1928 static int validate_download = 0;
1930 /* Callback service function for generic_load (bfd_map_over_sections). */
1933 add_section_size_callback (bfd *abfd, asection *asec, void *data)
1935 bfd_size_type *sum = data;
1937 *sum += bfd_get_section_size (asec);
1940 /* Opaque data for load_section_callback. */
1941 struct load_section_data {
1942 unsigned long load_offset;
1943 struct load_progress_data *progress_data;
1944 VEC(memory_write_request_s) *requests;
1947 /* Opaque data for load_progress. */
1948 struct load_progress_data {
1949 /* Cumulative data. */
1950 unsigned long write_count;
1951 unsigned long data_count;
1952 bfd_size_type total_size;
1955 /* Opaque data for load_progress for a single section. */
1956 struct load_progress_section_data {
1957 struct load_progress_data *cumulative;
1959 /* Per-section data. */
1960 const char *section_name;
1961 ULONGEST section_sent;
1962 ULONGEST section_size;
1967 /* Target write callback routine for progress reporting. */
1970 load_progress (ULONGEST bytes, void *untyped_arg)
1972 struct load_progress_section_data *args = untyped_arg;
1973 struct load_progress_data *totals;
1976 /* Writing padding data. No easy way to get at the cumulative
1977 stats, so just ignore this. */
1980 totals = args->cumulative;
1982 if (bytes == 0 && args->section_sent == 0)
1984 /* The write is just starting. Let the user know we've started
1986 ui_out_message (current_uiout, 0, "Loading section %s, size %s lma %s\n",
1987 args->section_name, hex_string (args->section_size),
1988 paddress (target_gdbarch, args->lma));
1992 if (validate_download)
1994 /* Broken memories and broken monitors manifest themselves here
1995 when bring new computers to life. This doubles already slow
1997 /* NOTE: cagney/1999-10-18: A more efficient implementation
1998 might add a verify_memory() method to the target vector and
1999 then use that. remote.c could implement that method using
2000 the ``qCRC'' packet. */
2001 gdb_byte *check = xmalloc (bytes);
2002 struct cleanup *verify_cleanups = make_cleanup (xfree, check);
2004 if (target_read_memory (args->lma, check, bytes) != 0)
2005 error (_("Download verify read failed at %s"),
2006 paddress (target_gdbarch, args->lma));
2007 if (memcmp (args->buffer, check, bytes) != 0)
2008 error (_("Download verify compare failed at %s"),
2009 paddress (target_gdbarch, args->lma));
2010 do_cleanups (verify_cleanups);
2012 totals->data_count += bytes;
2014 args->buffer += bytes;
2015 totals->write_count += 1;
2016 args->section_sent += bytes;
2018 || (deprecated_ui_load_progress_hook != NULL
2019 && deprecated_ui_load_progress_hook (args->section_name,
2020 args->section_sent)))
2021 error (_("Canceled the download"));
2023 if (deprecated_show_load_progress != NULL)
2024 deprecated_show_load_progress (args->section_name,
2028 totals->total_size);
2031 /* Callback service function for generic_load (bfd_map_over_sections). */
2034 load_section_callback (bfd *abfd, asection *asec, void *data)
2036 struct memory_write_request *new_request;
2037 struct load_section_data *args = data;
2038 struct load_progress_section_data *section_data;
2039 bfd_size_type size = bfd_get_section_size (asec);
2041 const char *sect_name = bfd_get_section_name (abfd, asec);
2043 if ((bfd_get_section_flags (abfd, asec) & SEC_LOAD) == 0)
2049 new_request = VEC_safe_push (memory_write_request_s,
2050 args->requests, NULL);
2051 memset (new_request, 0, sizeof (struct memory_write_request));
2052 section_data = xcalloc (1, sizeof (struct load_progress_section_data));
2053 new_request->begin = bfd_section_lma (abfd, asec) + args->load_offset;
2054 new_request->end = new_request->begin + size; /* FIXME Should size
2056 new_request->data = xmalloc (size);
2057 new_request->baton = section_data;
2059 buffer = new_request->data;
2061 section_data->cumulative = args->progress_data;
2062 section_data->section_name = sect_name;
2063 section_data->section_size = size;
2064 section_data->lma = new_request->begin;
2065 section_data->buffer = buffer;
2067 bfd_get_section_contents (abfd, asec, buffer, 0, size);
2070 /* Clean up an entire memory request vector, including load
2071 data and progress records. */
2074 clear_memory_write_data (void *arg)
2076 VEC(memory_write_request_s) **vec_p = arg;
2077 VEC(memory_write_request_s) *vec = *vec_p;
2079 struct memory_write_request *mr;
2081 for (i = 0; VEC_iterate (memory_write_request_s, vec, i, mr); ++i)
2086 VEC_free (memory_write_request_s, vec);
2090 generic_load (char *args, int from_tty)
2093 struct timeval start_time, end_time;
2095 struct cleanup *old_cleanups = make_cleanup (null_cleanup, 0);
2096 struct load_section_data cbdata;
2097 struct load_progress_data total_progress;
2098 struct ui_out *uiout = current_uiout;
2103 memset (&cbdata, 0, sizeof (cbdata));
2104 memset (&total_progress, 0, sizeof (total_progress));
2105 cbdata.progress_data = &total_progress;
2107 make_cleanup (clear_memory_write_data, &cbdata.requests);
2110 error_no_arg (_("file to load"));
2112 argv = gdb_buildargv (args);
2113 make_cleanup_freeargv (argv);
2115 filename = tilde_expand (argv[0]);
2116 make_cleanup (xfree, filename);
2118 if (argv[1] != NULL)
2122 cbdata.load_offset = strtoul (argv[1], &endptr, 0);
2124 /* If the last word was not a valid number then
2125 treat it as a file name with spaces in. */
2126 if (argv[1] == endptr)
2127 error (_("Invalid download offset:%s."), argv[1]);
2129 if (argv[2] != NULL)
2130 error (_("Too many parameters."));
2133 /* Open the file for loading. */
2134 loadfile_bfd = bfd_openr (filename, gnutarget);
2135 if (loadfile_bfd == NULL)
2137 perror_with_name (filename);
2141 /* FIXME: should be checking for errors from bfd_close (for one thing,
2142 on error it does not free all the storage associated with the
2144 make_cleanup_bfd_close (loadfile_bfd);
2146 if (!bfd_check_format (loadfile_bfd, bfd_object))
2148 error (_("\"%s\" is not an object file: %s"), filename,
2149 bfd_errmsg (bfd_get_error ()));
2152 bfd_map_over_sections (loadfile_bfd, add_section_size_callback,
2153 (void *) &total_progress.total_size);
2155 bfd_map_over_sections (loadfile_bfd, load_section_callback, &cbdata);
2157 gettimeofday (&start_time, NULL);
2159 if (target_write_memory_blocks (cbdata.requests, flash_discard,
2160 load_progress) != 0)
2161 error (_("Load failed"));
2163 gettimeofday (&end_time, NULL);
2165 entry = bfd_get_start_address (loadfile_bfd);
2166 ui_out_text (uiout, "Start address ");
2167 ui_out_field_fmt (uiout, "address", "%s", paddress (target_gdbarch, entry));
2168 ui_out_text (uiout, ", load size ");
2169 ui_out_field_fmt (uiout, "load-size", "%lu", total_progress.data_count);
2170 ui_out_text (uiout, "\n");
2171 /* We were doing this in remote-mips.c, I suspect it is right
2172 for other targets too. */
2173 regcache_write_pc (get_current_regcache (), entry);
2175 /* Reset breakpoints, now that we have changed the load image. For
2176 instance, breakpoints may have been set (or reset, by
2177 post_create_inferior) while connected to the target but before we
2178 loaded the program. In that case, the prologue analyzer could
2179 have read instructions from the target to find the right
2180 breakpoint locations. Loading has changed the contents of that
2183 breakpoint_re_set ();
2185 /* FIXME: are we supposed to call symbol_file_add or not? According
2186 to a comment from remote-mips.c (where a call to symbol_file_add
2187 was commented out), making the call confuses GDB if more than one
2188 file is loaded in. Some targets do (e.g., remote-vx.c) but
2189 others don't (or didn't - perhaps they have all been deleted). */
2191 print_transfer_performance (gdb_stdout, total_progress.data_count,
2192 total_progress.write_count,
2193 &start_time, &end_time);
2195 do_cleanups (old_cleanups);
2198 /* Report how fast the transfer went. */
2200 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
2201 replaced by print_transfer_performance (with a very different
2202 function signature). */
2205 report_transfer_performance (unsigned long data_count, time_t start_time,
2208 struct timeval start, end;
2210 start.tv_sec = start_time;
2212 end.tv_sec = end_time;
2215 print_transfer_performance (gdb_stdout, data_count, 0, &start, &end);
2219 print_transfer_performance (struct ui_file *stream,
2220 unsigned long data_count,
2221 unsigned long write_count,
2222 const struct timeval *start_time,
2223 const struct timeval *end_time)
2225 ULONGEST time_count;
2226 struct ui_out *uiout = current_uiout;
2228 /* Compute the elapsed time in milliseconds, as a tradeoff between
2229 accuracy and overflow. */
2230 time_count = (end_time->tv_sec - start_time->tv_sec) * 1000;
2231 time_count += (end_time->tv_usec - start_time->tv_usec) / 1000;
2233 ui_out_text (uiout, "Transfer rate: ");
2236 unsigned long rate = ((ULONGEST) data_count * 1000) / time_count;
2238 if (ui_out_is_mi_like_p (uiout))
2240 ui_out_field_fmt (uiout, "transfer-rate", "%lu", rate * 8);
2241 ui_out_text (uiout, " bits/sec");
2243 else if (rate < 1024)
2245 ui_out_field_fmt (uiout, "transfer-rate", "%lu", rate);
2246 ui_out_text (uiout, " bytes/sec");
2250 ui_out_field_fmt (uiout, "transfer-rate", "%lu", rate / 1024);
2251 ui_out_text (uiout, " KB/sec");
2256 ui_out_field_fmt (uiout, "transferred-bits", "%lu", (data_count * 8));
2257 ui_out_text (uiout, " bits in <1 sec");
2259 if (write_count > 0)
2261 ui_out_text (uiout, ", ");
2262 ui_out_field_fmt (uiout, "write-rate", "%lu", data_count / write_count);
2263 ui_out_text (uiout, " bytes/write");
2265 ui_out_text (uiout, ".\n");
2268 /* This function allows the addition of incrementally linked object files.
2269 It does not modify any state in the target, only in the debugger. */
2270 /* Note: ezannoni 2000-04-13 This function/command used to have a
2271 special case syntax for the rombug target (Rombug is the boot
2272 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2273 rombug case, the user doesn't need to supply a text address,
2274 instead a call to target_link() (in target.c) would supply the
2275 value to use. We are now discontinuing this type of ad hoc syntax. */
2278 add_symbol_file_command (char *args, int from_tty)
2280 struct gdbarch *gdbarch = get_current_arch ();
2281 char *filename = NULL;
2282 int flags = OBJF_USERLOADED;
2284 int section_index = 0;
2288 int expecting_sec_name = 0;
2289 int expecting_sec_addr = 0;
2298 struct section_addr_info *section_addrs;
2299 struct sect_opt *sect_opts = NULL;
2300 size_t num_sect_opts = 0;
2301 struct cleanup *my_cleanups = make_cleanup (null_cleanup, NULL);
2304 sect_opts = (struct sect_opt *) xmalloc (num_sect_opts
2305 * sizeof (struct sect_opt));
2310 error (_("add-symbol-file takes a file name and an address"));
2312 argv = gdb_buildargv (args);
2313 make_cleanup_freeargv (argv);
2315 for (arg = argv[0], argcnt = 0; arg != NULL; arg = argv[++argcnt])
2317 /* Process the argument. */
2320 /* The first argument is the file name. */
2321 filename = tilde_expand (arg);
2322 make_cleanup (xfree, filename);
2327 /* The second argument is always the text address at which
2328 to load the program. */
2329 sect_opts[section_index].name = ".text";
2330 sect_opts[section_index].value = arg;
2331 if (++section_index >= num_sect_opts)
2334 sect_opts = ((struct sect_opt *)
2335 xrealloc (sect_opts,
2337 * sizeof (struct sect_opt)));
2342 /* It's an option (starting with '-') or it's an argument
2347 if (strcmp (arg, "-readnow") == 0)
2348 flags |= OBJF_READNOW;
2349 else if (strcmp (arg, "-s") == 0)
2351 expecting_sec_name = 1;
2352 expecting_sec_addr = 1;
2357 if (expecting_sec_name)
2359 sect_opts[section_index].name = arg;
2360 expecting_sec_name = 0;
2363 if (expecting_sec_addr)
2365 sect_opts[section_index].value = arg;
2366 expecting_sec_addr = 0;
2367 if (++section_index >= num_sect_opts)
2370 sect_opts = ((struct sect_opt *)
2371 xrealloc (sect_opts,
2373 * sizeof (struct sect_opt)));
2377 error (_("USAGE: add-symbol-file <filename> <textaddress>"
2378 " [-readnow] [-s <secname> <addr>]*"));
2383 /* This command takes at least two arguments. The first one is a
2384 filename, and the second is the address where this file has been
2385 loaded. Abort now if this address hasn't been provided by the
2387 if (section_index < 1)
2388 error (_("The address where %s has been loaded is missing"), filename);
2390 /* Print the prompt for the query below. And save the arguments into
2391 a sect_addr_info structure to be passed around to other
2392 functions. We have to split this up into separate print
2393 statements because hex_string returns a local static
2396 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename);
2397 section_addrs = alloc_section_addr_info (section_index);
2398 make_cleanup (xfree, section_addrs);
2399 for (i = 0; i < section_index; i++)
2402 char *val = sect_opts[i].value;
2403 char *sec = sect_opts[i].name;
2405 addr = parse_and_eval_address (val);
2407 /* Here we store the section offsets in the order they were
2408 entered on the command line. */
2409 section_addrs->other[sec_num].name = sec;
2410 section_addrs->other[sec_num].addr = addr;
2411 printf_unfiltered ("\t%s_addr = %s\n", sec,
2412 paddress (gdbarch, addr));
2415 /* The object's sections are initialized when a
2416 call is made to build_objfile_section_table (objfile).
2417 This happens in reread_symbols.
2418 At this point, we don't know what file type this is,
2419 so we can't determine what section names are valid. */
2422 if (from_tty && (!query ("%s", "")))
2423 error (_("Not confirmed."));
2425 symbol_file_add (filename, from_tty ? SYMFILE_VERBOSE : 0,
2426 section_addrs, flags);
2428 /* Getting new symbols may change our opinion about what is
2430 reinit_frame_cache ();
2431 do_cleanups (my_cleanups);
2435 typedef struct objfile *objfilep;
2437 DEF_VEC_P (objfilep);
2439 /* Re-read symbols if a symbol-file has changed. */
2441 reread_symbols (void)
2443 struct objfile *objfile;
2445 struct stat new_statbuf;
2447 VEC (objfilep) *new_objfiles = NULL;
2448 struct cleanup *all_cleanups;
2450 all_cleanups = make_cleanup (VEC_cleanup (objfilep), &new_objfiles);
2452 /* With the addition of shared libraries, this should be modified,
2453 the load time should be saved in the partial symbol tables, since
2454 different tables may come from different source files. FIXME.
2455 This routine should then walk down each partial symbol table
2456 and see if the symbol table that it originates from has been changed. */
2458 for (objfile = object_files; objfile; objfile = objfile->next)
2460 /* solib-sunos.c creates one objfile with obfd. */
2461 if (objfile->obfd == NULL)
2464 /* Separate debug objfiles are handled in the main objfile. */
2465 if (objfile->separate_debug_objfile_backlink)
2468 /* If this object is from an archive (what you usually create with
2469 `ar', often called a `static library' on most systems, though
2470 a `shared library' on AIX is also an archive), then you should
2471 stat on the archive name, not member name. */
2472 if (objfile->obfd->my_archive)
2473 res = stat (objfile->obfd->my_archive->filename, &new_statbuf);
2475 res = stat (objfile->name, &new_statbuf);
2478 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2479 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2483 new_modtime = new_statbuf.st_mtime;
2484 if (new_modtime != objfile->mtime)
2486 struct cleanup *old_cleanups;
2487 struct section_offsets *offsets;
2489 char *obfd_filename;
2491 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2494 /* There are various functions like symbol_file_add,
2495 symfile_bfd_open, syms_from_objfile, etc., which might
2496 appear to do what we want. But they have various other
2497 effects which we *don't* want. So we just do stuff
2498 ourselves. We don't worry about mapped files (for one thing,
2499 any mapped file will be out of date). */
2501 /* If we get an error, blow away this objfile (not sure if
2502 that is the correct response for things like shared
2504 old_cleanups = make_cleanup_free_objfile (objfile);
2505 /* We need to do this whenever any symbols go away. */
2506 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
2508 if (exec_bfd != NULL
2509 && filename_cmp (bfd_get_filename (objfile->obfd),
2510 bfd_get_filename (exec_bfd)) == 0)
2512 /* Reload EXEC_BFD without asking anything. */
2514 exec_file_attach (bfd_get_filename (objfile->obfd), 0);
2517 /* Keep the calls order approx. the same as in free_objfile. */
2519 /* Free the separate debug objfiles. It will be
2520 automatically recreated by sym_read. */
2521 free_objfile_separate_debug (objfile);
2523 /* Remove any references to this objfile in the global
2525 preserve_values (objfile);
2527 /* Nuke all the state that we will re-read. Much of the following
2528 code which sets things to NULL really is necessary to tell
2529 other parts of GDB that there is nothing currently there.
2531 Try to keep the freeing order compatible with free_objfile. */
2533 if (objfile->sf != NULL)
2535 (*objfile->sf->sym_finish) (objfile);
2538 clear_objfile_data (objfile);
2540 /* Clean up any state BFD has sitting around. We don't need
2541 to close the descriptor but BFD lacks a way of closing the
2542 BFD without closing the descriptor. */
2543 obfd_filename = bfd_get_filename (objfile->obfd);
2544 if (!bfd_close (objfile->obfd))
2545 error (_("Can't close BFD for %s: %s"), objfile->name,
2546 bfd_errmsg (bfd_get_error ()));
2547 objfile->obfd = bfd_open_maybe_remote (obfd_filename);
2548 if (objfile->obfd == NULL)
2549 error (_("Can't open %s to read symbols."), objfile->name);
2551 objfile->obfd = gdb_bfd_ref (objfile->obfd);
2552 /* bfd_openr sets cacheable to true, which is what we want. */
2553 if (!bfd_check_format (objfile->obfd, bfd_object))
2554 error (_("Can't read symbols from %s: %s."), objfile->name,
2555 bfd_errmsg (bfd_get_error ()));
2557 /* Save the offsets, we will nuke them with the rest of the
2559 num_offsets = objfile->num_sections;
2560 offsets = ((struct section_offsets *)
2561 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets)));
2562 memcpy (offsets, objfile->section_offsets,
2563 SIZEOF_N_SECTION_OFFSETS (num_offsets));
2565 /* FIXME: Do we have to free a whole linked list, or is this
2567 if (objfile->global_psymbols.list)
2568 xfree (objfile->global_psymbols.list);
2569 memset (&objfile->global_psymbols, 0,
2570 sizeof (objfile->global_psymbols));
2571 if (objfile->static_psymbols.list)
2572 xfree (objfile->static_psymbols.list);
2573 memset (&objfile->static_psymbols, 0,
2574 sizeof (objfile->static_psymbols));
2576 /* Free the obstacks for non-reusable objfiles. */
2577 psymbol_bcache_free (objfile->psymbol_cache);
2578 objfile->psymbol_cache = psymbol_bcache_init ();
2579 bcache_xfree (objfile->macro_cache);
2580 objfile->macro_cache = bcache_xmalloc (NULL, NULL);
2581 bcache_xfree (objfile->filename_cache);
2582 objfile->filename_cache = bcache_xmalloc (NULL,NULL);
2583 if (objfile->demangled_names_hash != NULL)
2585 htab_delete (objfile->demangled_names_hash);
2586 objfile->demangled_names_hash = NULL;
2588 obstack_free (&objfile->objfile_obstack, 0);
2589 objfile->sections = NULL;
2590 objfile->symtabs = NULL;
2591 objfile->psymtabs = NULL;
2592 objfile->psymtabs_addrmap = NULL;
2593 objfile->free_psymtabs = NULL;
2594 objfile->template_symbols = NULL;
2595 objfile->msymbols = NULL;
2596 objfile->deprecated_sym_private = NULL;
2597 objfile->minimal_symbol_count = 0;
2598 memset (&objfile->msymbol_hash, 0,
2599 sizeof (objfile->msymbol_hash));
2600 memset (&objfile->msymbol_demangled_hash, 0,
2601 sizeof (objfile->msymbol_demangled_hash));
2603 /* obstack_init also initializes the obstack so it is
2604 empty. We could use obstack_specify_allocation but
2605 gdb_obstack.h specifies the alloc/dealloc
2607 obstack_init (&objfile->objfile_obstack);
2608 if (build_objfile_section_table (objfile))
2610 error (_("Can't find the file sections in `%s': %s"),
2611 objfile->name, bfd_errmsg (bfd_get_error ()));
2613 terminate_minimal_symbol_table (objfile);
2615 /* We use the same section offsets as from last time. I'm not
2616 sure whether that is always correct for shared libraries. */
2617 objfile->section_offsets = (struct section_offsets *)
2618 obstack_alloc (&objfile->objfile_obstack,
2619 SIZEOF_N_SECTION_OFFSETS (num_offsets));
2620 memcpy (objfile->section_offsets, offsets,
2621 SIZEOF_N_SECTION_OFFSETS (num_offsets));
2622 objfile->num_sections = num_offsets;
2624 /* What the hell is sym_new_init for, anyway? The concept of
2625 distinguishing between the main file and additional files
2626 in this way seems rather dubious. */
2627 if (objfile == symfile_objfile)
2629 (*objfile->sf->sym_new_init) (objfile);
2632 (*objfile->sf->sym_init) (objfile);
2633 clear_complaints (&symfile_complaints, 1, 1);
2634 /* Do not set flags as this is safe and we don't want to be
2636 (*objfile->sf->sym_read) (objfile, 0);
2637 if ((objfile->flags & OBJF_PSYMTABS_READ) != 0)
2639 objfile->flags &= ~OBJF_PSYMTABS_READ;
2640 require_partial_symbols (objfile, 0);
2643 if (!objfile_has_symbols (objfile))
2646 printf_unfiltered (_("(no debugging symbols found)\n"));
2650 /* We're done reading the symbol file; finish off complaints. */
2651 clear_complaints (&symfile_complaints, 0, 1);
2653 /* Getting new symbols may change our opinion about what is
2656 reinit_frame_cache ();
2658 /* Discard cleanups as symbol reading was successful. */
2659 discard_cleanups (old_cleanups);
2661 /* If the mtime has changed between the time we set new_modtime
2662 and now, we *want* this to be out of date, so don't call stat
2664 objfile->mtime = new_modtime;
2665 init_entry_point_info (objfile);
2667 VEC_safe_push (objfilep, new_objfiles, objfile);
2675 /* Notify objfiles that we've modified objfile sections. */
2676 objfiles_changed ();
2678 clear_symtab_users (0);
2680 /* clear_objfile_data for each objfile was called before freeing it and
2681 observer_notify_new_objfile (NULL) has been called by
2682 clear_symtab_users above. Notify the new files now. */
2683 for (ix = 0; VEC_iterate (objfilep, new_objfiles, ix, objfile); ix++)
2684 observer_notify_new_objfile (objfile);
2686 /* At least one objfile has changed, so we can consider that
2687 the executable we're debugging has changed too. */
2688 observer_notify_executable_changed ();
2691 do_cleanups (all_cleanups);
2703 static filename_language *filename_language_table;
2704 static int fl_table_size, fl_table_next;
2707 add_filename_language (char *ext, enum language lang)
2709 if (fl_table_next >= fl_table_size)
2711 fl_table_size += 10;
2712 filename_language_table =
2713 xrealloc (filename_language_table,
2714 fl_table_size * sizeof (*filename_language_table));
2717 filename_language_table[fl_table_next].ext = xstrdup (ext);
2718 filename_language_table[fl_table_next].lang = lang;
2722 static char *ext_args;
2724 show_ext_args (struct ui_file *file, int from_tty,
2725 struct cmd_list_element *c, const char *value)
2727 fprintf_filtered (file,
2728 _("Mapping between filename extension "
2729 "and source language is \"%s\".\n"),
2734 set_ext_lang_command (char *args, int from_tty, struct cmd_list_element *e)
2737 char *cp = ext_args;
2740 /* First arg is filename extension, starting with '.' */
2742 error (_("'%s': Filename extension must begin with '.'"), ext_args);
2744 /* Find end of first arg. */
2745 while (*cp && !isspace (*cp))
2749 error (_("'%s': two arguments required -- "
2750 "filename extension and language"),
2753 /* Null-terminate first arg. */
2756 /* Find beginning of second arg, which should be a source language. */
2757 while (*cp && isspace (*cp))
2761 error (_("'%s': two arguments required -- "
2762 "filename extension and language"),
2765 /* Lookup the language from among those we know. */
2766 lang = language_enum (cp);
2768 /* Now lookup the filename extension: do we already know it? */
2769 for (i = 0; i < fl_table_next; i++)
2770 if (0 == strcmp (ext_args, filename_language_table[i].ext))
2773 if (i >= fl_table_next)
2775 /* New file extension. */
2776 add_filename_language (ext_args, lang);
2780 /* Redefining a previously known filename extension. */
2783 /* query ("Really make files of type %s '%s'?", */
2784 /* ext_args, language_str (lang)); */
2786 xfree (filename_language_table[i].ext);
2787 filename_language_table[i].ext = xstrdup (ext_args);
2788 filename_language_table[i].lang = lang;
2793 info_ext_lang_command (char *args, int from_tty)
2797 printf_filtered (_("Filename extensions and the languages they represent:"));
2798 printf_filtered ("\n\n");
2799 for (i = 0; i < fl_table_next; i++)
2800 printf_filtered ("\t%s\t- %s\n",
2801 filename_language_table[i].ext,
2802 language_str (filename_language_table[i].lang));
2806 init_filename_language_table (void)
2808 if (fl_table_size == 0) /* Protect against repetition. */
2812 filename_language_table =
2813 xmalloc (fl_table_size * sizeof (*filename_language_table));
2814 add_filename_language (".c", language_c);
2815 add_filename_language (".d", language_d);
2816 add_filename_language (".C", language_cplus);
2817 add_filename_language (".cc", language_cplus);
2818 add_filename_language (".cp", language_cplus);
2819 add_filename_language (".cpp", language_cplus);
2820 add_filename_language (".cxx", language_cplus);
2821 add_filename_language (".c++", language_cplus);
2822 add_filename_language (".java", language_java);
2823 add_filename_language (".class", language_java);
2824 add_filename_language (".m", language_objc);
2825 add_filename_language (".f", language_fortran);
2826 add_filename_language (".F", language_fortran);
2827 add_filename_language (".for", language_fortran);
2828 add_filename_language (".FOR", language_fortran);
2829 add_filename_language (".ftn", language_fortran);
2830 add_filename_language (".FTN", language_fortran);
2831 add_filename_language (".fpp", language_fortran);
2832 add_filename_language (".FPP", language_fortran);
2833 add_filename_language (".f90", language_fortran);
2834 add_filename_language (".F90", language_fortran);
2835 add_filename_language (".f95", language_fortran);
2836 add_filename_language (".F95", language_fortran);
2837 add_filename_language (".f03", language_fortran);
2838 add_filename_language (".F03", language_fortran);
2839 add_filename_language (".f08", language_fortran);
2840 add_filename_language (".F08", language_fortran);
2841 add_filename_language (".s", language_asm);
2842 add_filename_language (".sx", language_asm);
2843 add_filename_language (".S", language_asm);
2844 add_filename_language (".pas", language_pascal);
2845 add_filename_language (".p", language_pascal);
2846 add_filename_language (".pp", language_pascal);
2847 add_filename_language (".adb", language_ada);
2848 add_filename_language (".ads", language_ada);
2849 add_filename_language (".a", language_ada);
2850 add_filename_language (".ada", language_ada);
2851 add_filename_language (".dg", language_ada);
2856 deduce_language_from_filename (const char *filename)
2861 if (filename != NULL)
2862 if ((cp = strrchr (filename, '.')) != NULL)
2863 for (i = 0; i < fl_table_next; i++)
2864 if (strcmp (cp, filename_language_table[i].ext) == 0)
2865 return filename_language_table[i].lang;
2867 return language_unknown;
2872 Allocate and partly initialize a new symbol table. Return a pointer
2873 to it. error() if no space.
2875 Caller must set these fields:
2884 allocate_symtab (const char *filename, struct objfile *objfile)
2886 struct symtab *symtab;
2888 symtab = (struct symtab *)
2889 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symtab));
2890 memset (symtab, 0, sizeof (*symtab));
2891 symtab->filename = (char *) bcache (filename, strlen (filename) + 1,
2892 objfile->filename_cache);
2893 symtab->fullname = NULL;
2894 symtab->language = deduce_language_from_filename (filename);
2895 symtab->debugformat = "unknown";
2897 /* Hook it to the objfile it comes from. */
2899 symtab->objfile = objfile;
2900 symtab->next = objfile->symtabs;
2901 objfile->symtabs = symtab;
2907 /* Reset all data structures in gdb which may contain references to symbol
2908 table data. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
2911 clear_symtab_users (int add_flags)
2913 /* Someday, we should do better than this, by only blowing away
2914 the things that really need to be blown. */
2916 /* Clear the "current" symtab first, because it is no longer valid.
2917 breakpoint_re_set may try to access the current symtab. */
2918 clear_current_source_symtab_and_line ();
2921 if ((add_flags & SYMFILE_DEFER_BP_RESET) == 0)
2922 breakpoint_re_set ();
2923 clear_last_displayed_sal ();
2924 clear_pc_function_cache ();
2925 observer_notify_new_objfile (NULL);
2927 /* Clear globals which might have pointed into a removed objfile.
2928 FIXME: It's not clear which of these are supposed to persist
2929 between expressions and which ought to be reset each time. */
2930 expression_context_block = NULL;
2931 innermost_block = NULL;
2933 /* Varobj may refer to old symbols, perform a cleanup. */
2934 varobj_invalidate ();
2939 clear_symtab_users_cleanup (void *ignore)
2941 clear_symtab_users (0);
2945 The following code implements an abstraction for debugging overlay sections.
2947 The target model is as follows:
2948 1) The gnu linker will permit multiple sections to be mapped into the
2949 same VMA, each with its own unique LMA (or load address).
2950 2) It is assumed that some runtime mechanism exists for mapping the
2951 sections, one by one, from the load address into the VMA address.
2952 3) This code provides a mechanism for gdb to keep track of which
2953 sections should be considered to be mapped from the VMA to the LMA.
2954 This information is used for symbol lookup, and memory read/write.
2955 For instance, if a section has been mapped then its contents
2956 should be read from the VMA, otherwise from the LMA.
2958 Two levels of debugger support for overlays are available. One is
2959 "manual", in which the debugger relies on the user to tell it which
2960 overlays are currently mapped. This level of support is
2961 implemented entirely in the core debugger, and the information about
2962 whether a section is mapped is kept in the objfile->obj_section table.
2964 The second level of support is "automatic", and is only available if
2965 the target-specific code provides functionality to read the target's
2966 overlay mapping table, and translate its contents for the debugger
2967 (by updating the mapped state information in the obj_section tables).
2969 The interface is as follows:
2971 overlay map <name> -- tell gdb to consider this section mapped
2972 overlay unmap <name> -- tell gdb to consider this section unmapped
2973 overlay list -- list the sections that GDB thinks are mapped
2974 overlay read-target -- get the target's state of what's mapped
2975 overlay off/manual/auto -- set overlay debugging state
2976 Functional interface:
2977 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2978 section, return that section.
2979 find_pc_overlay(pc): find any overlay section that contains
2980 the pc, either in its VMA or its LMA
2981 section_is_mapped(sect): true if overlay is marked as mapped
2982 section_is_overlay(sect): true if section's VMA != LMA
2983 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2984 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2985 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2986 overlay_mapped_address(...): map an address from section's LMA to VMA
2987 overlay_unmapped_address(...): map an address from section's VMA to LMA
2988 symbol_overlayed_address(...): Return a "current" address for symbol:
2989 either in VMA or LMA depending on whether
2990 the symbol's section is currently mapped. */
2992 /* Overlay debugging state: */
2994 enum overlay_debugging_state overlay_debugging = ovly_off;
2995 int overlay_cache_invalid = 0; /* True if need to refresh mapped state. */
2997 /* Function: section_is_overlay (SECTION)
2998 Returns true if SECTION has VMA not equal to LMA, ie.
2999 SECTION is loaded at an address different from where it will "run". */
3002 section_is_overlay (struct obj_section *section)
3004 if (overlay_debugging && section)
3006 bfd *abfd = section->objfile->obfd;
3007 asection *bfd_section = section->the_bfd_section;
3009 if (bfd_section_lma (abfd, bfd_section) != 0
3010 && bfd_section_lma (abfd, bfd_section)
3011 != bfd_section_vma (abfd, bfd_section))
3018 /* Function: overlay_invalidate_all (void)
3019 Invalidate the mapped state of all overlay sections (mark it as stale). */
3022 overlay_invalidate_all (void)
3024 struct objfile *objfile;
3025 struct obj_section *sect;
3027 ALL_OBJSECTIONS (objfile, sect)
3028 if (section_is_overlay (sect))
3029 sect->ovly_mapped = -1;
3032 /* Function: section_is_mapped (SECTION)
3033 Returns true if section is an overlay, and is currently mapped.
3035 Access to the ovly_mapped flag is restricted to this function, so
3036 that we can do automatic update. If the global flag
3037 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
3038 overlay_invalidate_all. If the mapped state of the particular
3039 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
3042 section_is_mapped (struct obj_section *osect)
3044 struct gdbarch *gdbarch;
3046 if (osect == 0 || !section_is_overlay (osect))
3049 switch (overlay_debugging)
3053 return 0; /* overlay debugging off */
3054 case ovly_auto: /* overlay debugging automatic */
3055 /* Unles there is a gdbarch_overlay_update function,
3056 there's really nothing useful to do here (can't really go auto). */
3057 gdbarch = get_objfile_arch (osect->objfile);
3058 if (gdbarch_overlay_update_p (gdbarch))
3060 if (overlay_cache_invalid)
3062 overlay_invalidate_all ();
3063 overlay_cache_invalid = 0;
3065 if (osect->ovly_mapped == -1)
3066 gdbarch_overlay_update (gdbarch, osect);
3068 /* fall thru to manual case */
3069 case ovly_on: /* overlay debugging manual */
3070 return osect->ovly_mapped == 1;
3074 /* Function: pc_in_unmapped_range
3075 If PC falls into the lma range of SECTION, return true, else false. */
3078 pc_in_unmapped_range (CORE_ADDR pc, struct obj_section *section)
3080 if (section_is_overlay (section))
3082 bfd *abfd = section->objfile->obfd;
3083 asection *bfd_section = section->the_bfd_section;
3085 /* We assume the LMA is relocated by the same offset as the VMA. */
3086 bfd_vma size = bfd_get_section_size (bfd_section);
3087 CORE_ADDR offset = obj_section_offset (section);
3089 if (bfd_get_section_lma (abfd, bfd_section) + offset <= pc
3090 && pc < bfd_get_section_lma (abfd, bfd_section) + offset + size)
3097 /* Function: pc_in_mapped_range
3098 If PC falls into the vma range of SECTION, return true, else false. */
3101 pc_in_mapped_range (CORE_ADDR pc, struct obj_section *section)
3103 if (section_is_overlay (section))
3105 if (obj_section_addr (section) <= pc
3106 && pc < obj_section_endaddr (section))
3114 /* Return true if the mapped ranges of sections A and B overlap, false
3117 sections_overlap (struct obj_section *a, struct obj_section *b)
3119 CORE_ADDR a_start = obj_section_addr (a);
3120 CORE_ADDR a_end = obj_section_endaddr (a);
3121 CORE_ADDR b_start = obj_section_addr (b);
3122 CORE_ADDR b_end = obj_section_endaddr (b);
3124 return (a_start < b_end && b_start < a_end);
3127 /* Function: overlay_unmapped_address (PC, SECTION)
3128 Returns the address corresponding to PC in the unmapped (load) range.
3129 May be the same as PC. */
3132 overlay_unmapped_address (CORE_ADDR pc, struct obj_section *section)
3134 if (section_is_overlay (section) && pc_in_mapped_range (pc, section))
3136 bfd *abfd = section->objfile->obfd;
3137 asection *bfd_section = section->the_bfd_section;
3139 return pc + bfd_section_lma (abfd, bfd_section)
3140 - bfd_section_vma (abfd, bfd_section);
3146 /* Function: overlay_mapped_address (PC, SECTION)
3147 Returns the address corresponding to PC in the mapped (runtime) range.
3148 May be the same as PC. */
3151 overlay_mapped_address (CORE_ADDR pc, struct obj_section *section)
3153 if (section_is_overlay (section) && pc_in_unmapped_range (pc, section))
3155 bfd *abfd = section->objfile->obfd;
3156 asection *bfd_section = section->the_bfd_section;
3158 return pc + bfd_section_vma (abfd, bfd_section)
3159 - bfd_section_lma (abfd, bfd_section);
3166 /* Function: symbol_overlayed_address
3167 Return one of two addresses (relative to the VMA or to the LMA),
3168 depending on whether the section is mapped or not. */
3171 symbol_overlayed_address (CORE_ADDR address, struct obj_section *section)
3173 if (overlay_debugging)
3175 /* If the symbol has no section, just return its regular address. */
3178 /* If the symbol's section is not an overlay, just return its
3180 if (!section_is_overlay (section))
3182 /* If the symbol's section is mapped, just return its address. */
3183 if (section_is_mapped (section))
3186 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3187 * then return its LOADED address rather than its vma address!!
3189 return overlay_unmapped_address (address, section);
3194 /* Function: find_pc_overlay (PC)
3195 Return the best-match overlay section for PC:
3196 If PC matches a mapped overlay section's VMA, return that section.
3197 Else if PC matches an unmapped section's VMA, return that section.
3198 Else if PC matches an unmapped section's LMA, return that section. */
3200 struct obj_section *
3201 find_pc_overlay (CORE_ADDR pc)
3203 struct objfile *objfile;
3204 struct obj_section *osect, *best_match = NULL;
3206 if (overlay_debugging)
3207 ALL_OBJSECTIONS (objfile, osect)
3208 if (section_is_overlay (osect))
3210 if (pc_in_mapped_range (pc, osect))
3212 if (section_is_mapped (osect))
3217 else if (pc_in_unmapped_range (pc, osect))
3223 /* Function: find_pc_mapped_section (PC)
3224 If PC falls into the VMA address range of an overlay section that is
3225 currently marked as MAPPED, return that section. Else return NULL. */
3227 struct obj_section *
3228 find_pc_mapped_section (CORE_ADDR pc)
3230 struct objfile *objfile;
3231 struct obj_section *osect;
3233 if (overlay_debugging)
3234 ALL_OBJSECTIONS (objfile, osect)
3235 if (pc_in_mapped_range (pc, osect) && section_is_mapped (osect))
3241 /* Function: list_overlays_command
3242 Print a list of mapped sections and their PC ranges. */
3245 list_overlays_command (char *args, int from_tty)
3248 struct objfile *objfile;
3249 struct obj_section *osect;
3251 if (overlay_debugging)
3252 ALL_OBJSECTIONS (objfile, osect)
3253 if (section_is_mapped (osect))
3255 struct gdbarch *gdbarch = get_objfile_arch (objfile);
3260 vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section);
3261 lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section);
3262 size = bfd_get_section_size (osect->the_bfd_section);
3263 name = bfd_section_name (objfile->obfd, osect->the_bfd_section);
3265 printf_filtered ("Section %s, loaded at ", name);
3266 fputs_filtered (paddress (gdbarch, lma), gdb_stdout);
3267 puts_filtered (" - ");
3268 fputs_filtered (paddress (gdbarch, lma + size), gdb_stdout);
3269 printf_filtered (", mapped at ");
3270 fputs_filtered (paddress (gdbarch, vma), gdb_stdout);
3271 puts_filtered (" - ");
3272 fputs_filtered (paddress (gdbarch, vma + size), gdb_stdout);
3273 puts_filtered ("\n");
3278 printf_filtered (_("No sections are mapped.\n"));
3281 /* Function: map_overlay_command
3282 Mark the named section as mapped (ie. residing at its VMA address). */
3285 map_overlay_command (char *args, int from_tty)
3287 struct objfile *objfile, *objfile2;
3288 struct obj_section *sec, *sec2;
3290 if (!overlay_debugging)
3291 error (_("Overlay debugging not enabled. Use "
3292 "either the 'overlay auto' or\n"
3293 "the 'overlay manual' command."));
3295 if (args == 0 || *args == 0)
3296 error (_("Argument required: name of an overlay section"));
3298 /* First, find a section matching the user supplied argument. */
3299 ALL_OBJSECTIONS (objfile, sec)
3300 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
3302 /* Now, check to see if the section is an overlay. */
3303 if (!section_is_overlay (sec))
3304 continue; /* not an overlay section */
3306 /* Mark the overlay as "mapped". */
3307 sec->ovly_mapped = 1;
3309 /* Next, make a pass and unmap any sections that are
3310 overlapped by this new section: */
3311 ALL_OBJSECTIONS (objfile2, sec2)
3312 if (sec2->ovly_mapped && sec != sec2 && sections_overlap (sec, sec2))
3315 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3316 bfd_section_name (objfile->obfd,
3317 sec2->the_bfd_section));
3318 sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2. */
3322 error (_("No overlay section called %s"), args);
3325 /* Function: unmap_overlay_command
3326 Mark the overlay section as unmapped
3327 (ie. resident in its LMA address range, rather than the VMA range). */
3330 unmap_overlay_command (char *args, int from_tty)
3332 struct objfile *objfile;
3333 struct obj_section *sec;
3335 if (!overlay_debugging)
3336 error (_("Overlay debugging not enabled. "
3337 "Use either the 'overlay auto' or\n"
3338 "the 'overlay manual' command."));
3340 if (args == 0 || *args == 0)
3341 error (_("Argument required: name of an overlay section"));
3343 /* First, find a section matching the user supplied argument. */
3344 ALL_OBJSECTIONS (objfile, sec)
3345 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
3347 if (!sec->ovly_mapped)
3348 error (_("Section %s is not mapped"), args);
3349 sec->ovly_mapped = 0;
3352 error (_("No overlay section called %s"), args);
3355 /* Function: overlay_auto_command
3356 A utility command to turn on overlay debugging.
3357 Possibly this should be done via a set/show command. */
3360 overlay_auto_command (char *args, int from_tty)
3362 overlay_debugging = ovly_auto;
3363 enable_overlay_breakpoints ();
3365 printf_unfiltered (_("Automatic overlay debugging enabled."));
3368 /* Function: overlay_manual_command
3369 A utility command to turn on overlay debugging.
3370 Possibly this should be done via a set/show command. */
3373 overlay_manual_command (char *args, int from_tty)
3375 overlay_debugging = ovly_on;
3376 disable_overlay_breakpoints ();
3378 printf_unfiltered (_("Overlay debugging enabled."));
3381 /* Function: overlay_off_command
3382 A utility command to turn on overlay debugging.
3383 Possibly this should be done via a set/show command. */
3386 overlay_off_command (char *args, int from_tty)
3388 overlay_debugging = ovly_off;
3389 disable_overlay_breakpoints ();
3391 printf_unfiltered (_("Overlay debugging disabled."));
3395 overlay_load_command (char *args, int from_tty)
3397 struct gdbarch *gdbarch = get_current_arch ();
3399 if (gdbarch_overlay_update_p (gdbarch))
3400 gdbarch_overlay_update (gdbarch, NULL);
3402 error (_("This target does not know how to read its overlay state."));
3405 /* Function: overlay_command
3406 A place-holder for a mis-typed command. */
3408 /* Command list chain containing all defined "overlay" subcommands. */
3409 struct cmd_list_element *overlaylist;
3412 overlay_command (char *args, int from_tty)
3415 ("\"overlay\" must be followed by the name of an overlay command.\n");
3416 help_list (overlaylist, "overlay ", -1, gdb_stdout);
3420 /* Target Overlays for the "Simplest" overlay manager:
3422 This is GDB's default target overlay layer. It works with the
3423 minimal overlay manager supplied as an example by Cygnus. The
3424 entry point is via a function pointer "gdbarch_overlay_update",
3425 so targets that use a different runtime overlay manager can
3426 substitute their own overlay_update function and take over the
3429 The overlay_update function pokes around in the target's data structures
3430 to see what overlays are mapped, and updates GDB's overlay mapping with
3433 In this simple implementation, the target data structures are as follows:
3434 unsigned _novlys; /# number of overlay sections #/
3435 unsigned _ovly_table[_novlys][4] = {
3436 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3437 {..., ..., ..., ...},
3439 unsigned _novly_regions; /# number of overlay regions #/
3440 unsigned _ovly_region_table[_novly_regions][3] = {
3441 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3444 These functions will attempt to update GDB's mappedness state in the
3445 symbol section table, based on the target's mappedness state.
3447 To do this, we keep a cached copy of the target's _ovly_table, and
3448 attempt to detect when the cached copy is invalidated. The main
3449 entry point is "simple_overlay_update(SECT), which looks up SECT in
3450 the cached table and re-reads only the entry for that section from
3451 the target (whenever possible). */
3453 /* Cached, dynamically allocated copies of the target data structures: */
3454 static unsigned (*cache_ovly_table)[4] = 0;
3455 static unsigned cache_novlys = 0;
3456 static CORE_ADDR cache_ovly_table_base = 0;
3459 VMA, SIZE, LMA, MAPPED
3462 /* Throw away the cached copy of _ovly_table. */
3464 simple_free_overlay_table (void)
3466 if (cache_ovly_table)
3467 xfree (cache_ovly_table);
3469 cache_ovly_table = NULL;
3470 cache_ovly_table_base = 0;
3473 /* Read an array of ints of size SIZE from the target into a local buffer.
3474 Convert to host order. int LEN is number of ints. */
3476 read_target_long_array (CORE_ADDR memaddr, unsigned int *myaddr,
3477 int len, int size, enum bfd_endian byte_order)
3479 /* FIXME (alloca): Not safe if array is very large. */
3480 gdb_byte *buf = alloca (len * size);
3483 read_memory (memaddr, buf, len * size);
3484 for (i = 0; i < len; i++)
3485 myaddr[i] = extract_unsigned_integer (size * i + buf, size, byte_order);
3488 /* Find and grab a copy of the target _ovly_table
3489 (and _novlys, which is needed for the table's size). */
3491 simple_read_overlay_table (void)
3493 struct minimal_symbol *novlys_msym, *ovly_table_msym;
3494 struct gdbarch *gdbarch;
3496 enum bfd_endian byte_order;
3498 simple_free_overlay_table ();
3499 novlys_msym = lookup_minimal_symbol ("_novlys", NULL, NULL);
3502 error (_("Error reading inferior's overlay table: "
3503 "couldn't find `_novlys' variable\n"
3504 "in inferior. Use `overlay manual' mode."));
3508 ovly_table_msym = lookup_minimal_symbol ("_ovly_table", NULL, NULL);
3509 if (! ovly_table_msym)
3511 error (_("Error reading inferior's overlay table: couldn't find "
3512 "`_ovly_table' array\n"
3513 "in inferior. Use `overlay manual' mode."));
3517 gdbarch = get_objfile_arch (msymbol_objfile (ovly_table_msym));
3518 word_size = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT;
3519 byte_order = gdbarch_byte_order (gdbarch);
3521 cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym),
3524 = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table));
3525 cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (ovly_table_msym);
3526 read_target_long_array (cache_ovly_table_base,
3527 (unsigned int *) cache_ovly_table,
3528 cache_novlys * 4, word_size, byte_order);
3530 return 1; /* SUCCESS */
3533 /* Function: simple_overlay_update_1
3534 A helper function for simple_overlay_update. Assuming a cached copy
3535 of _ovly_table exists, look through it to find an entry whose vma,
3536 lma and size match those of OSECT. Re-read the entry and make sure
3537 it still matches OSECT (else the table may no longer be valid).
3538 Set OSECT's mapped state to match the entry. Return: 1 for
3539 success, 0 for failure. */
3542 simple_overlay_update_1 (struct obj_section *osect)
3545 bfd *obfd = osect->objfile->obfd;
3546 asection *bsect = osect->the_bfd_section;
3547 struct gdbarch *gdbarch = get_objfile_arch (osect->objfile);
3548 int word_size = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT;
3549 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3551 size = bfd_get_section_size (osect->the_bfd_section);
3552 for (i = 0; i < cache_novlys; i++)
3553 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3554 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3555 /* && cache_ovly_table[i][SIZE] == size */ )
3557 read_target_long_array (cache_ovly_table_base + i * word_size,
3558 (unsigned int *) cache_ovly_table[i],
3559 4, word_size, byte_order);
3560 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3561 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3562 /* && cache_ovly_table[i][SIZE] == size */ )
3564 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3567 else /* Warning! Warning! Target's ovly table has changed! */
3573 /* Function: simple_overlay_update
3574 If OSECT is NULL, then update all sections' mapped state
3575 (after re-reading the entire target _ovly_table).
3576 If OSECT is non-NULL, then try to find a matching entry in the
3577 cached ovly_table and update only OSECT's mapped state.
3578 If a cached entry can't be found or the cache isn't valid, then
3579 re-read the entire cache, and go ahead and update all sections. */
3582 simple_overlay_update (struct obj_section *osect)
3584 struct objfile *objfile;
3586 /* Were we given an osect to look up? NULL means do all of them. */
3588 /* Have we got a cached copy of the target's overlay table? */
3589 if (cache_ovly_table != NULL)
3591 /* Does its cached location match what's currently in the
3593 struct minimal_symbol *minsym
3594 = lookup_minimal_symbol ("_ovly_table", NULL, NULL);
3597 error (_("Error reading inferior's overlay table: couldn't "
3598 "find `_ovly_table' array\n"
3599 "in inferior. Use `overlay manual' mode."));
3601 if (cache_ovly_table_base == SYMBOL_VALUE_ADDRESS (minsym))
3602 /* Then go ahead and try to look up this single section in
3604 if (simple_overlay_update_1 (osect))
3605 /* Found it! We're done. */
3609 /* Cached table no good: need to read the entire table anew.
3610 Or else we want all the sections, in which case it's actually
3611 more efficient to read the whole table in one block anyway. */
3613 if (! simple_read_overlay_table ())
3616 /* Now may as well update all sections, even if only one was requested. */
3617 ALL_OBJSECTIONS (objfile, osect)
3618 if (section_is_overlay (osect))
3621 bfd *obfd = osect->objfile->obfd;
3622 asection *bsect = osect->the_bfd_section;
3624 size = bfd_get_section_size (bsect);
3625 for (i = 0; i < cache_novlys; i++)
3626 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3627 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3628 /* && cache_ovly_table[i][SIZE] == size */ )
3629 { /* obj_section matches i'th entry in ovly_table. */
3630 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3631 break; /* finished with inner for loop: break out. */
3636 /* Set the output sections and output offsets for section SECTP in
3637 ABFD. The relocation code in BFD will read these offsets, so we
3638 need to be sure they're initialized. We map each section to itself,
3639 with no offset; this means that SECTP->vma will be honored. */
3642 symfile_dummy_outputs (bfd *abfd, asection *sectp, void *dummy)
3644 sectp->output_section = sectp;
3645 sectp->output_offset = 0;
3648 /* Default implementation for sym_relocate. */
3652 default_symfile_relocate (struct objfile *objfile, asection *sectp,
3655 bfd *abfd = objfile->obfd;
3657 /* We're only interested in sections with relocation
3659 if ((sectp->flags & SEC_RELOC) == 0)
3662 /* We will handle section offsets properly elsewhere, so relocate as if
3663 all sections begin at 0. */
3664 bfd_map_over_sections (abfd, symfile_dummy_outputs, NULL);
3666 return bfd_simple_get_relocated_section_contents (abfd, sectp, buf, NULL);
3669 /* Relocate the contents of a debug section SECTP in ABFD. The
3670 contents are stored in BUF if it is non-NULL, or returned in a
3671 malloc'd buffer otherwise.
3673 For some platforms and debug info formats, shared libraries contain
3674 relocations against the debug sections (particularly for DWARF-2;
3675 one affected platform is PowerPC GNU/Linux, although it depends on
3676 the version of the linker in use). Also, ELF object files naturally
3677 have unresolved relocations for their debug sections. We need to apply
3678 the relocations in order to get the locations of symbols correct.
3679 Another example that may require relocation processing, is the
3680 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3684 symfile_relocate_debug_section (struct objfile *objfile,
3685 asection *sectp, bfd_byte *buf)
3687 gdb_assert (objfile->sf->sym_relocate);
3689 return (*objfile->sf->sym_relocate) (objfile, sectp, buf);
3692 struct symfile_segment_data *
3693 get_symfile_segment_data (bfd *abfd)
3695 const struct sym_fns *sf = find_sym_fns (abfd);
3700 return sf->sym_segments (abfd);
3704 free_symfile_segment_data (struct symfile_segment_data *data)
3706 xfree (data->segment_bases);
3707 xfree (data->segment_sizes);
3708 xfree (data->segment_info);
3714 - DATA, containing segment addresses from the object file ABFD, and
3715 the mapping from ABFD's sections onto the segments that own them,
3717 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3718 segment addresses reported by the target,
3719 store the appropriate offsets for each section in OFFSETS.
3721 If there are fewer entries in SEGMENT_BASES than there are segments
3722 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3724 If there are more entries, then ignore the extra. The target may
3725 not be able to distinguish between an empty data segment and a
3726 missing data segment; a missing text segment is less plausible. */
3728 symfile_map_offsets_to_segments (bfd *abfd, struct symfile_segment_data *data,
3729 struct section_offsets *offsets,
3730 int num_segment_bases,
3731 const CORE_ADDR *segment_bases)
3736 /* It doesn't make sense to call this function unless you have some
3737 segment base addresses. */
3738 gdb_assert (num_segment_bases > 0);
3740 /* If we do not have segment mappings for the object file, we
3741 can not relocate it by segments. */
3742 gdb_assert (data != NULL);
3743 gdb_assert (data->num_segments > 0);
3745 for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next)
3747 int which = data->segment_info[i];
3749 gdb_assert (0 <= which && which <= data->num_segments);
3751 /* Don't bother computing offsets for sections that aren't
3752 loaded as part of any segment. */
3756 /* Use the last SEGMENT_BASES entry as the address of any extra
3757 segments mentioned in DATA->segment_info. */
3758 if (which > num_segment_bases)
3759 which = num_segment_bases;
3761 offsets->offsets[i] = (segment_bases[which - 1]
3762 - data->segment_bases[which - 1]);
3769 symfile_find_segment_sections (struct objfile *objfile)
3771 bfd *abfd = objfile->obfd;
3774 struct symfile_segment_data *data;
3776 data = get_symfile_segment_data (objfile->obfd);
3780 if (data->num_segments != 1 && data->num_segments != 2)
3782 free_symfile_segment_data (data);
3786 for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next)
3788 int which = data->segment_info[i];
3792 if (objfile->sect_index_text == -1)
3793 objfile->sect_index_text = sect->index;
3795 if (objfile->sect_index_rodata == -1)
3796 objfile->sect_index_rodata = sect->index;
3798 else if (which == 2)
3800 if (objfile->sect_index_data == -1)
3801 objfile->sect_index_data = sect->index;
3803 if (objfile->sect_index_bss == -1)
3804 objfile->sect_index_bss = sect->index;
3808 free_symfile_segment_data (data);
3812 _initialize_symfile (void)
3814 struct cmd_list_element *c;
3816 c = add_cmd ("symbol-file", class_files, symbol_file_command, _("\
3817 Load symbol table from executable file FILE.\n\
3818 The `file' command can also load symbol tables, as well as setting the file\n\
3819 to execute."), &cmdlist);
3820 set_cmd_completer (c, filename_completer);
3822 c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command, _("\
3823 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3824 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR>\
3825 ...]\nADDR is the starting address of the file's text.\n\
3826 The optional arguments are section-name section-address pairs and\n\
3827 should be specified if the data and bss segments are not contiguous\n\
3828 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3830 set_cmd_completer (c, filename_completer);
3832 c = add_cmd ("load", class_files, load_command, _("\
3833 Dynamically load FILE into the running program, and record its symbols\n\
3834 for access from GDB.\n\
3835 A load OFFSET may also be given."), &cmdlist);
3836 set_cmd_completer (c, filename_completer);
3838 add_setshow_boolean_cmd ("symbol-reloading", class_support,
3839 &symbol_reloading, _("\
3840 Set dynamic symbol table reloading multiple times in one run."), _("\
3841 Show dynamic symbol table reloading multiple times in one run."), NULL,
3843 show_symbol_reloading,
3844 &setlist, &showlist);
3846 add_prefix_cmd ("overlay", class_support, overlay_command,
3847 _("Commands for debugging overlays."), &overlaylist,
3848 "overlay ", 0, &cmdlist);
3850 add_com_alias ("ovly", "overlay", class_alias, 1);
3851 add_com_alias ("ov", "overlay", class_alias, 1);
3853 add_cmd ("map-overlay", class_support, map_overlay_command,
3854 _("Assert that an overlay section is mapped."), &overlaylist);
3856 add_cmd ("unmap-overlay", class_support, unmap_overlay_command,
3857 _("Assert that an overlay section is unmapped."), &overlaylist);
3859 add_cmd ("list-overlays", class_support, list_overlays_command,
3860 _("List mappings of overlay sections."), &overlaylist);
3862 add_cmd ("manual", class_support, overlay_manual_command,
3863 _("Enable overlay debugging."), &overlaylist);
3864 add_cmd ("off", class_support, overlay_off_command,
3865 _("Disable overlay debugging."), &overlaylist);
3866 add_cmd ("auto", class_support, overlay_auto_command,
3867 _("Enable automatic overlay debugging."), &overlaylist);
3868 add_cmd ("load-target", class_support, overlay_load_command,
3869 _("Read the overlay mapping state from the target."), &overlaylist);
3871 /* Filename extension to source language lookup table: */
3872 init_filename_language_table ();
3873 add_setshow_string_noescape_cmd ("extension-language", class_files,
3875 Set mapping between filename extension and source language."), _("\
3876 Show mapping between filename extension and source language."), _("\
3877 Usage: set extension-language .foo bar"),
3878 set_ext_lang_command,
3880 &setlist, &showlist);
3882 add_info ("extensions", info_ext_lang_command,
3883 _("All filename extensions associated with a source language."));
3885 add_setshow_optional_filename_cmd ("debug-file-directory", class_support,
3886 &debug_file_directory, _("\
3887 Set the directories where separate debug symbols are searched for."), _("\
3888 Show the directories where separate debug symbols are searched for."), _("\
3889 Separate debug symbols are first searched for in the same\n\
3890 directory as the binary, then in the `" DEBUG_SUBDIRECTORY "' subdirectory,\n\
3891 and lastly at the path of the directory of the binary with\n\
3892 each global debug-file-directory component prepended."),
3894 show_debug_file_directory,
3895 &setlist, &showlist);