1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
5 Free Software Foundation, Inc.
7 Contributed by Cygnus Support, using pieces from other GDB modules.
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>. */
25 #include "arch-utils.h"
37 #include "breakpoint.h"
39 #include "complaints.h"
43 #include "filenames.h" /* for DOSish file names */
44 #include "gdb-stabs.h"
45 #include "gdb_obstack.h"
46 #include "completer.h"
49 #include "readline/readline.h"
50 #include "gdb_assert.h"
54 #include "parser-defs.h"
60 #include <sys/types.h>
62 #include "gdb_string.h"
70 int (*deprecated_ui_load_progress_hook) (const char *section, unsigned long num);
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 */
91 static int simple_read_overlay_region_table (void);
92 static void simple_free_overlay_region_table (void);
95 static void load_command (char *, int);
97 static void symbol_file_add_main_1 (char *args, int from_tty, int flags);
99 static void add_symbol_file_command (char *, int);
101 bfd *symfile_bfd_open (char *);
103 int get_section_index (struct objfile *, char *);
105 static struct sym_fns *find_sym_fns (bfd *);
107 static void decrement_reading_symtab (void *);
109 static void overlay_invalidate_all (void);
111 void list_overlays_command (char *, int);
113 void map_overlay_command (char *, int);
115 void unmap_overlay_command (char *, int);
117 static void overlay_auto_command (char *, int);
119 static void overlay_manual_command (char *, int);
121 static void overlay_off_command (char *, int);
123 static void overlay_load_command (char *, int);
125 static void overlay_command (char *, int);
127 static void simple_free_overlay_table (void);
129 static void read_target_long_array (CORE_ADDR, unsigned int *, int, int,
132 static int simple_read_overlay_table (void);
134 static int simple_overlay_update_1 (struct obj_section *);
136 static void add_filename_language (char *ext, enum language lang);
138 static void info_ext_lang_command (char *args, int from_tty);
140 static void init_filename_language_table (void);
142 static void symfile_find_segment_sections (struct objfile *objfile);
144 void _initialize_symfile (void);
146 /* List of all available sym_fns. On gdb startup, each object file reader
147 calls add_symtab_fns() to register information on each format it is
150 static struct sym_fns *symtab_fns = NULL;
152 /* Flag for whether user will be reloading symbols multiple times.
153 Defaults to ON for VxWorks, otherwise OFF. */
155 #ifdef SYMBOL_RELOADING_DEFAULT
156 int symbol_reloading = SYMBOL_RELOADING_DEFAULT;
158 int symbol_reloading = 0;
161 show_symbol_reloading (struct ui_file *file, int from_tty,
162 struct cmd_list_element *c, const char *value)
164 fprintf_filtered (file, _("\
165 Dynamic symbol table reloading multiple times in one run is %s.\n"),
169 /* If non-zero, shared library symbols will be added automatically
170 when the inferior is created, new libraries are loaded, or when
171 attaching to the inferior. This is almost always what users will
172 want to have happen; but for very large programs, the startup time
173 will be excessive, and so if this is a problem, the user can clear
174 this flag and then add the shared library symbols as needed. Note
175 that there is a potential for confusion, since if the shared
176 library symbols are not loaded, commands like "info fun" will *not*
177 report all the functions that are actually present. */
179 int auto_solib_add = 1;
181 /* For systems that support it, a threshold size in megabytes. If
182 automatically adding a new library's symbol table to those already
183 known to the debugger would cause the total shared library symbol
184 size to exceed this threshhold, then the shlib's symbols are not
185 added. The threshold is ignored if the user explicitly asks for a
186 shlib to be added, such as when using the "sharedlibrary"
189 int auto_solib_limit;
192 /* Make a null terminated copy of the string at PTR with SIZE characters in
193 the obstack pointed to by OBSTACKP . Returns the address of the copy.
194 Note that the string at PTR does not have to be null terminated, I.E. it
195 may be part of a larger string and we are only saving a substring. */
198 obsavestring (const char *ptr, int size, struct obstack *obstackp)
200 char *p = (char *) obstack_alloc (obstackp, size + 1);
201 /* Open-coded memcpy--saves function call time. These strings are usually
202 short. FIXME: Is this really still true with a compiler that can
205 const char *p1 = ptr;
207 const char *end = ptr + size;
216 /* Concatenate NULL terminated variable argument list of `const char *' strings;
217 return the new string. Space is found in the OBSTACKP. Argument list must
218 be terminated by a sentinel expression `(char *) NULL'. */
221 obconcat (struct obstack *obstackp, ...)
225 va_start (ap, obstackp);
228 const char *s = va_arg (ap, const char *);
233 obstack_grow_str (obstackp, s);
236 obstack_1grow (obstackp, 0);
238 return obstack_finish (obstackp);
241 /* True if we are reading a symbol table. */
243 int currently_reading_symtab = 0;
246 decrement_reading_symtab (void *dummy)
248 currently_reading_symtab--;
251 /* Increment currently_reading_symtab and return a cleanup that can be
252 used to decrement it. */
254 increment_reading_symtab (void)
256 ++currently_reading_symtab;
257 return make_cleanup (decrement_reading_symtab, NULL);
260 /* Remember the lowest-addressed loadable section we've seen.
261 This function is called via bfd_map_over_sections.
263 In case of equal vmas, the section with the largest size becomes the
264 lowest-addressed loadable section.
266 If the vmas and sizes are equal, the last section is considered the
267 lowest-addressed loadable section. */
270 find_lowest_section (bfd *abfd, asection *sect, void *obj)
272 asection **lowest = (asection **) obj;
274 if (0 == (bfd_get_section_flags (abfd, sect) & (SEC_ALLOC | SEC_LOAD)))
277 *lowest = sect; /* First loadable section */
278 else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect))
279 *lowest = sect; /* A lower loadable section */
280 else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect)
281 && (bfd_section_size (abfd, (*lowest))
282 <= bfd_section_size (abfd, sect)))
286 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
288 struct section_addr_info *
289 alloc_section_addr_info (size_t num_sections)
291 struct section_addr_info *sap;
294 size = (sizeof (struct section_addr_info)
295 + sizeof (struct other_sections) * (num_sections - 1));
296 sap = (struct section_addr_info *) xmalloc (size);
297 memset (sap, 0, size);
298 sap->num_sections = num_sections;
303 /* Build (allocate and populate) a section_addr_info struct from
304 an existing section table. */
306 extern struct section_addr_info *
307 build_section_addr_info_from_section_table (const struct target_section *start,
308 const struct target_section *end)
310 struct section_addr_info *sap;
311 const struct target_section *stp;
314 sap = alloc_section_addr_info (end - start);
316 for (stp = start, oidx = 0; stp != end; stp++)
318 if (bfd_get_section_flags (stp->bfd,
319 stp->the_bfd_section) & (SEC_ALLOC | SEC_LOAD)
320 && oidx < end - start)
322 sap->other[oidx].addr = stp->addr;
323 sap->other[oidx].name
324 = xstrdup (bfd_section_name (stp->bfd, stp->the_bfd_section));
325 sap->other[oidx].sectindex = stp->the_bfd_section->index;
333 /* Create a section_addr_info from section offsets in ABFD. */
335 static struct section_addr_info *
336 build_section_addr_info_from_bfd (bfd *abfd)
338 struct section_addr_info *sap;
340 struct bfd_section *sec;
342 sap = alloc_section_addr_info (bfd_count_sections (abfd));
343 for (i = 0, sec = abfd->sections; sec != NULL; sec = sec->next)
344 if (bfd_get_section_flags (abfd, sec) & (SEC_ALLOC | SEC_LOAD))
346 sap->other[i].addr = bfd_get_section_vma (abfd, sec);
347 sap->other[i].name = xstrdup (bfd_get_section_name (abfd, sec));
348 sap->other[i].sectindex = sec->index;
354 /* Create a section_addr_info from section offsets in OBJFILE. */
356 struct section_addr_info *
357 build_section_addr_info_from_objfile (const struct objfile *objfile)
359 struct section_addr_info *sap;
362 /* Before reread_symbols gets rewritten it is not safe to call:
363 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
365 sap = build_section_addr_info_from_bfd (objfile->obfd);
366 for (i = 0; i < sap->num_sections && sap->other[i].name; i++)
368 int sectindex = sap->other[i].sectindex;
370 sap->other[i].addr += objfile->section_offsets->offsets[sectindex];
375 /* Free all memory allocated by build_section_addr_info_from_section_table. */
378 free_section_addr_info (struct section_addr_info *sap)
382 for (idx = 0; idx < sap->num_sections; idx++)
383 if (sap->other[idx].name)
384 xfree (sap->other[idx].name);
389 /* Initialize OBJFILE's sect_index_* members. */
391 init_objfile_sect_indices (struct objfile *objfile)
396 sect = bfd_get_section_by_name (objfile->obfd, ".text");
398 objfile->sect_index_text = sect->index;
400 sect = bfd_get_section_by_name (objfile->obfd, ".data");
402 objfile->sect_index_data = sect->index;
404 sect = bfd_get_section_by_name (objfile->obfd, ".bss");
406 objfile->sect_index_bss = sect->index;
408 sect = bfd_get_section_by_name (objfile->obfd, ".rodata");
410 objfile->sect_index_rodata = sect->index;
412 /* This is where things get really weird... We MUST have valid
413 indices for the various sect_index_* members or gdb will abort.
414 So if for example, there is no ".text" section, we have to
415 accomodate that. First, check for a file with the standard
416 one or two segments. */
418 symfile_find_segment_sections (objfile);
420 /* Except when explicitly adding symbol files at some address,
421 section_offsets contains nothing but zeros, so it doesn't matter
422 which slot in section_offsets the individual sect_index_* members
423 index into. So if they are all zero, it is safe to just point
424 all the currently uninitialized indices to the first slot. But
425 beware: if this is the main executable, it may be relocated
426 later, e.g. by the remote qOffsets packet, and then this will
427 be wrong! That's why we try segments first. */
429 for (i = 0; i < objfile->num_sections; i++)
431 if (ANOFFSET (objfile->section_offsets, i) != 0)
436 if (i == objfile->num_sections)
438 if (objfile->sect_index_text == -1)
439 objfile->sect_index_text = 0;
440 if (objfile->sect_index_data == -1)
441 objfile->sect_index_data = 0;
442 if (objfile->sect_index_bss == -1)
443 objfile->sect_index_bss = 0;
444 if (objfile->sect_index_rodata == -1)
445 objfile->sect_index_rodata = 0;
449 /* The arguments to place_section. */
451 struct place_section_arg
453 struct section_offsets *offsets;
457 /* Find a unique offset to use for loadable section SECT if
458 the user did not provide an offset. */
461 place_section (bfd *abfd, asection *sect, void *obj)
463 struct place_section_arg *arg = obj;
464 CORE_ADDR *offsets = arg->offsets->offsets, start_addr;
466 ULONGEST align = ((ULONGEST) 1) << bfd_get_section_alignment (abfd, sect);
468 /* We are only interested in allocated sections. */
469 if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0)
472 /* If the user specified an offset, honor it. */
473 if (offsets[sect->index] != 0)
476 /* Otherwise, let's try to find a place for the section. */
477 start_addr = (arg->lowest + align - 1) & -align;
484 for (cur_sec = abfd->sections; cur_sec != NULL; cur_sec = cur_sec->next)
486 int indx = cur_sec->index;
488 /* We don't need to compare against ourself. */
492 /* We can only conflict with allocated sections. */
493 if ((bfd_get_section_flags (abfd, cur_sec) & SEC_ALLOC) == 0)
496 /* If the section offset is 0, either the section has not been placed
497 yet, or it was the lowest section placed (in which case LOWEST
498 will be past its end). */
499 if (offsets[indx] == 0)
502 /* If this section would overlap us, then we must move up. */
503 if (start_addr + bfd_get_section_size (sect) > offsets[indx]
504 && start_addr < offsets[indx] + bfd_get_section_size (cur_sec))
506 start_addr = offsets[indx] + bfd_get_section_size (cur_sec);
507 start_addr = (start_addr + align - 1) & -align;
512 /* Otherwise, we appear to be OK. So far. */
517 offsets[sect->index] = start_addr;
518 arg->lowest = start_addr + bfd_get_section_size (sect);
521 /* Store struct section_addr_info as prepared (made relative and with SECTINDEX
522 filled-in) by addr_info_make_relative into SECTION_OFFSETS of NUM_SECTIONS
526 relative_addr_info_to_section_offsets (struct section_offsets *section_offsets,
528 struct section_addr_info *addrs)
532 memset (section_offsets, 0, SIZEOF_N_SECTION_OFFSETS (num_sections));
534 /* Now calculate offsets for section that were specified by the caller. */
535 for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++)
537 struct other_sections *osp;
539 osp = &addrs->other[i];
543 /* Record all sections in offsets */
544 /* The section_offsets in the objfile are here filled in using
546 section_offsets->offsets[osp->sectindex] = osp->addr;
550 /* qsort comparator for addrs_section_sort. Sort entries in ascending order by
551 their (name, sectindex) pair. sectindex makes the sort by name stable. */
554 addrs_section_compar (const void *ap, const void *bp)
556 const struct other_sections *a = *((struct other_sections **) ap);
557 const struct other_sections *b = *((struct other_sections **) bp);
558 int retval, a_idx, b_idx;
560 retval = strcmp (a->name, b->name);
564 /* SECTINDEX is undefined iff ADDR is zero. */
565 a_idx = a->addr == 0 ? 0 : a->sectindex;
566 b_idx = b->addr == 0 ? 0 : b->sectindex;
567 return a_idx - b_idx;
570 /* Provide sorted array of pointers to sections of ADDRS. The array is
571 terminated by NULL. Caller is responsible to call xfree for it. */
573 static struct other_sections **
574 addrs_section_sort (struct section_addr_info *addrs)
576 struct other_sections **array;
579 /* `+ 1' for the NULL terminator. */
580 array = xmalloc (sizeof (*array) * (addrs->num_sections + 1));
581 for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++)
582 array[i] = &addrs->other[i];
585 qsort (array, i, sizeof (*array), addrs_section_compar);
590 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
591 also SECTINDEXes specific to ABFD there. This function can be used to
592 rebase ADDRS to start referencing different BFD than before. */
595 addr_info_make_relative (struct section_addr_info *addrs, bfd *abfd)
597 asection *lower_sect;
598 CORE_ADDR lower_offset;
600 struct cleanup *my_cleanup;
601 struct section_addr_info *abfd_addrs;
602 struct other_sections **addrs_sorted, **abfd_addrs_sorted;
603 struct other_sections **addrs_to_abfd_addrs;
605 /* Find lowest loadable section to be used as starting point for
606 continguous sections. */
608 bfd_map_over_sections (abfd, find_lowest_section, &lower_sect);
609 if (lower_sect == NULL)
611 warning (_("no loadable sections found in added symbol-file %s"),
612 bfd_get_filename (abfd));
616 lower_offset = bfd_section_vma (bfd_get_filename (abfd), lower_sect);
618 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
619 in ABFD. Section names are not unique - there can be multiple sections of
620 the same name. Also the sections of the same name do not have to be
621 adjacent to each other. Some sections may be present only in one of the
622 files. Even sections present in both files do not have to be in the same
625 Use stable sort by name for the sections in both files. Then linearly
626 scan both lists matching as most of the entries as possible. */
628 addrs_sorted = addrs_section_sort (addrs);
629 my_cleanup = make_cleanup (xfree, addrs_sorted);
631 abfd_addrs = build_section_addr_info_from_bfd (abfd);
632 make_cleanup_free_section_addr_info (abfd_addrs);
633 abfd_addrs_sorted = addrs_section_sort (abfd_addrs);
634 make_cleanup (xfree, abfd_addrs_sorted);
636 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and ABFD_ADDRS_SORTED. */
638 addrs_to_abfd_addrs = xzalloc (sizeof (*addrs_to_abfd_addrs)
639 * addrs->num_sections);
640 make_cleanup (xfree, addrs_to_abfd_addrs);
642 while (*addrs_sorted)
644 const char *sect_name = (*addrs_sorted)->name;
646 while (*abfd_addrs_sorted
647 && strcmp ((*abfd_addrs_sorted)->name, sect_name) < 0)
650 if (*abfd_addrs_sorted
651 && strcmp ((*abfd_addrs_sorted)->name, sect_name) == 0)
655 /* Make the found item directly addressable from ADDRS. */
656 index_in_addrs = *addrs_sorted - addrs->other;
657 gdb_assert (addrs_to_abfd_addrs[index_in_addrs] == NULL);
658 addrs_to_abfd_addrs[index_in_addrs] = *abfd_addrs_sorted;
660 /* Never use the same ABFD entry twice. */
667 /* Calculate offsets for the loadable sections.
668 FIXME! Sections must be in order of increasing loadable section
669 so that contiguous sections can use the lower-offset!!!
671 Adjust offsets if the segments are not contiguous.
672 If the section is contiguous, its offset should be set to
673 the offset of the highest loadable section lower than it
674 (the loadable section directly below it in memory).
675 this_offset = lower_offset = lower_addr - lower_orig_addr */
677 for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++)
679 const char *sect_name = addrs->other[i].name;
680 struct other_sections *sect = addrs_to_abfd_addrs[i];
684 /* This is the index used by BFD. */
685 addrs->other[i].sectindex = sect->sectindex;
687 if (addrs->other[i].addr != 0)
689 addrs->other[i].addr -= sect->addr;
690 lower_offset = addrs->other[i].addr;
693 addrs->other[i].addr = lower_offset;
697 /* This section does not exist in ABFD, which is normally
698 unexpected and we want to issue a warning.
700 However, the ELF prelinker does create a few sections which are
701 marked in the main executable as loadable (they are loaded in
702 memory from the DYNAMIC segment) and yet are not present in
703 separate debug info files. This is fine, and should not cause
704 a warning. Shared libraries contain just the section
705 ".gnu.liblist" but it is not marked as loadable there. There is
706 no other way to identify them than by their name as the sections
707 created by prelink have no special flags. */
709 if (!(strcmp (sect_name, ".gnu.liblist") == 0
710 || strcmp (sect_name, ".gnu.conflict") == 0
711 || strcmp (sect_name, ".dynbss") == 0
712 || strcmp (sect_name, ".sdynbss") == 0))
713 warning (_("section %s not found in %s"), sect_name,
714 bfd_get_filename (abfd));
716 addrs->other[i].addr = 0;
718 /* SECTINDEX is invalid if ADDR is zero. */
722 do_cleanups (my_cleanup);
725 /* Parse the user's idea of an offset for dynamic linking, into our idea
726 of how to represent it for fast symbol reading. This is the default
727 version of the sym_fns.sym_offsets function for symbol readers that
728 don't need to do anything special. It allocates a section_offsets table
729 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
732 default_symfile_offsets (struct objfile *objfile,
733 struct section_addr_info *addrs)
735 objfile->num_sections = bfd_count_sections (objfile->obfd);
736 objfile->section_offsets = (struct section_offsets *)
737 obstack_alloc (&objfile->objfile_obstack,
738 SIZEOF_N_SECTION_OFFSETS (objfile->num_sections));
739 relative_addr_info_to_section_offsets (objfile->section_offsets,
740 objfile->num_sections, addrs);
742 /* For relocatable files, all loadable sections will start at zero.
743 The zero is meaningless, so try to pick arbitrary addresses such
744 that no loadable sections overlap. This algorithm is quadratic,
745 but the number of sections in a single object file is generally
747 if ((bfd_get_file_flags (objfile->obfd) & (EXEC_P | DYNAMIC)) == 0)
749 struct place_section_arg arg;
750 bfd *abfd = objfile->obfd;
753 for (cur_sec = abfd->sections; cur_sec != NULL; cur_sec = cur_sec->next)
754 /* We do not expect this to happen; just skip this step if the
755 relocatable file has a section with an assigned VMA. */
756 if (bfd_section_vma (abfd, cur_sec) != 0)
761 CORE_ADDR *offsets = objfile->section_offsets->offsets;
763 /* Pick non-overlapping offsets for sections the user did not
765 arg.offsets = objfile->section_offsets;
767 bfd_map_over_sections (objfile->obfd, place_section, &arg);
769 /* Correctly filling in the section offsets is not quite
770 enough. Relocatable files have two properties that
771 (most) shared objects do not:
773 - Their debug information will contain relocations. Some
774 shared libraries do also, but many do not, so this can not
777 - If there are multiple code sections they will be loaded
778 at different relative addresses in memory than they are
779 in the objfile, since all sections in the file will start
782 Because GDB has very limited ability to map from an
783 address in debug info to the correct code section,
784 it relies on adding SECT_OFF_TEXT to things which might be
785 code. If we clear all the section offsets, and set the
786 section VMAs instead, then symfile_relocate_debug_section
787 will return meaningful debug information pointing at the
790 GDB has too many different data structures for section
791 addresses - a bfd, objfile, and so_list all have section
792 tables, as does exec_ops. Some of these could probably
795 for (cur_sec = abfd->sections; cur_sec != NULL;
796 cur_sec = cur_sec->next)
798 if ((bfd_get_section_flags (abfd, cur_sec) & SEC_ALLOC) == 0)
801 bfd_set_section_vma (abfd, cur_sec, offsets[cur_sec->index]);
802 exec_set_section_address (bfd_get_filename (abfd), cur_sec->index,
803 offsets[cur_sec->index]);
804 offsets[cur_sec->index] = 0;
809 /* Remember the bfd indexes for the .text, .data, .bss and
811 init_objfile_sect_indices (objfile);
815 /* Divide the file into segments, which are individual relocatable units.
816 This is the default version of the sym_fns.sym_segments function for
817 symbol readers that do not have an explicit representation of segments.
818 It assumes that object files do not have segments, and fully linked
819 files have a single segment. */
821 struct symfile_segment_data *
822 default_symfile_segments (bfd *abfd)
826 struct symfile_segment_data *data;
829 /* Relocatable files contain enough information to position each
830 loadable section independently; they should not be relocated
832 if ((bfd_get_file_flags (abfd) & (EXEC_P | DYNAMIC)) == 0)
835 /* Make sure there is at least one loadable section in the file. */
836 for (sect = abfd->sections; sect != NULL; sect = sect->next)
838 if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0)
846 low = bfd_get_section_vma (abfd, sect);
847 high = low + bfd_get_section_size (sect);
849 data = XZALLOC (struct symfile_segment_data);
850 data->num_segments = 1;
851 data->segment_bases = XCALLOC (1, CORE_ADDR);
852 data->segment_sizes = XCALLOC (1, CORE_ADDR);
854 num_sections = bfd_count_sections (abfd);
855 data->segment_info = XCALLOC (num_sections, int);
857 for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next)
861 if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0)
864 vma = bfd_get_section_vma (abfd, sect);
867 if (vma + bfd_get_section_size (sect) > high)
868 high = vma + bfd_get_section_size (sect);
870 data->segment_info[i] = 1;
873 data->segment_bases[0] = low;
874 data->segment_sizes[0] = high - low;
879 /* Process a symbol file, as either the main file or as a dynamically
882 OBJFILE is where the symbols are to be read from.
884 ADDRS is the list of section load addresses. If the user has given
885 an 'add-symbol-file' command, then this is the list of offsets and
886 addresses he or she provided as arguments to the command; or, if
887 we're handling a shared library, these are the actual addresses the
888 sections are loaded at, according to the inferior's dynamic linker
889 (as gleaned by GDB's shared library code). We convert each address
890 into an offset from the section VMA's as it appears in the object
891 file, and then call the file's sym_offsets function to convert this
892 into a format-specific offset table --- a `struct section_offsets'.
893 If ADDRS is non-zero, OFFSETS must be zero.
895 OFFSETS is a table of section offsets already in the right
896 format-specific representation. NUM_OFFSETS is the number of
897 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
898 assume this is the proper table the call to sym_offsets described
899 above would produce. Instead of calling sym_offsets, we just dump
900 it right into objfile->section_offsets. (When we're re-reading
901 symbols from an objfile, we don't have the original load address
902 list any more; all we have is the section offset table.) If
903 OFFSETS is non-zero, ADDRS must be zero.
905 ADD_FLAGS encodes verbosity level, whether this is main symbol or
906 an extra symbol file such as dynamically loaded code, and wether
907 breakpoint reset should be deferred. */
910 syms_from_objfile (struct objfile *objfile,
911 struct section_addr_info *addrs,
912 struct section_offsets *offsets,
916 struct section_addr_info *local_addr = NULL;
917 struct cleanup *old_chain;
918 const int mainline = add_flags & SYMFILE_MAINLINE;
920 gdb_assert (! (addrs && offsets));
922 init_entry_point_info (objfile);
923 objfile->sf = find_sym_fns (objfile->obfd);
925 if (objfile->sf == NULL)
926 return; /* No symbols. */
928 /* Make sure that partially constructed symbol tables will be cleaned up
929 if an error occurs during symbol reading. */
930 old_chain = make_cleanup_free_objfile (objfile);
932 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
933 list. We now establish the convention that an addr of zero means
934 no load address was specified. */
935 if (! addrs && ! offsets)
938 = alloc_section_addr_info (bfd_count_sections (objfile->obfd));
939 make_cleanup (xfree, local_addr);
943 /* Now either addrs or offsets is non-zero. */
947 /* We will modify the main symbol table, make sure that all its users
948 will be cleaned up if an error occurs during symbol reading. */
949 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
951 /* Since no error yet, throw away the old symbol table. */
953 if (symfile_objfile != NULL)
955 free_objfile (symfile_objfile);
956 gdb_assert (symfile_objfile == NULL);
959 /* Currently we keep symbols from the add-symbol-file command.
960 If the user wants to get rid of them, they should do "symbol-file"
961 without arguments first. Not sure this is the best behavior
964 (*objfile->sf->sym_new_init) (objfile);
967 /* Convert addr into an offset rather than an absolute address.
968 We find the lowest address of a loaded segment in the objfile,
969 and assume that <addr> is where that got loaded.
971 We no longer warn if the lowest section is not a text segment (as
972 happens for the PA64 port. */
973 if (addrs && addrs->other[0].name)
974 addr_info_make_relative (addrs, objfile->obfd);
976 /* Initialize symbol reading routines for this objfile, allow complaints to
977 appear for this new file, and record how verbose to be, then do the
978 initial symbol reading for this file. */
980 (*objfile->sf->sym_init) (objfile);
981 clear_complaints (&symfile_complaints, 1, add_flags & SYMFILE_VERBOSE);
984 (*objfile->sf->sym_offsets) (objfile, addrs);
987 size_t size = SIZEOF_N_SECTION_OFFSETS (num_offsets);
989 /* Just copy in the offset table directly as given to us. */
990 objfile->num_sections = num_offsets;
991 objfile->section_offsets
992 = ((struct section_offsets *)
993 obstack_alloc (&objfile->objfile_obstack, size));
994 memcpy (objfile->section_offsets, offsets, size);
996 init_objfile_sect_indices (objfile);
999 (*objfile->sf->sym_read) (objfile, add_flags);
1001 /* Discard cleanups as symbol reading was successful. */
1003 discard_cleanups (old_chain);
1007 /* Perform required actions after either reading in the initial
1008 symbols for a new objfile, or mapping in the symbols from a reusable
1012 new_symfile_objfile (struct objfile *objfile, int add_flags)
1014 /* If this is the main symbol file we have to clean up all users of the
1015 old main symbol file. Otherwise it is sufficient to fixup all the
1016 breakpoints that may have been redefined by this symbol file. */
1017 if (add_flags & SYMFILE_MAINLINE)
1019 /* OK, make it the "real" symbol file. */
1020 symfile_objfile = objfile;
1022 clear_symtab_users ();
1024 else if ((add_flags & SYMFILE_DEFER_BP_RESET) == 0)
1026 breakpoint_re_set ();
1029 /* We're done reading the symbol file; finish off complaints. */
1030 clear_complaints (&symfile_complaints, 0, add_flags & SYMFILE_VERBOSE);
1033 /* Process a symbol file, as either the main file or as a dynamically
1036 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1037 This BFD will be closed on error, and is always consumed by this function.
1039 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1040 extra, such as dynamically loaded code, and what to do with breakpoins.
1042 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
1043 syms_from_objfile, above.
1044 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1046 Upon success, returns a pointer to the objfile that was added.
1047 Upon failure, jumps back to command level (never returns). */
1049 static struct objfile *
1050 symbol_file_add_with_addrs_or_offsets (bfd *abfd,
1052 struct section_addr_info *addrs,
1053 struct section_offsets *offsets,
1057 struct objfile *objfile;
1058 struct cleanup *my_cleanups;
1059 const char *name = bfd_get_filename (abfd);
1060 const int from_tty = add_flags & SYMFILE_VERBOSE;
1062 if (readnow_symbol_files)
1063 flags |= OBJF_READNOW;
1065 my_cleanups = make_cleanup_bfd_close (abfd);
1067 /* Give user a chance to burp if we'd be
1068 interactively wiping out any existing symbols. */
1070 if ((have_full_symbols () || have_partial_symbols ())
1071 && (add_flags & SYMFILE_MAINLINE)
1073 && !query (_("Load new symbol table from \"%s\"? "), name))
1074 error (_("Not confirmed."));
1076 objfile = allocate_objfile (abfd, flags);
1077 discard_cleanups (my_cleanups);
1079 /* We either created a new mapped symbol table, mapped an existing
1080 symbol table file which has not had initial symbol reading
1081 performed, or need to read an unmapped symbol table. */
1082 if (from_tty || info_verbose)
1084 if (deprecated_pre_add_symbol_hook)
1085 deprecated_pre_add_symbol_hook (name);
1088 printf_unfiltered (_("Reading symbols from %s..."), name);
1090 gdb_flush (gdb_stdout);
1093 syms_from_objfile (objfile, addrs, offsets, num_offsets,
1096 /* We now have at least a partial symbol table. Check to see if the
1097 user requested that all symbols be read on initial access via either
1098 the gdb startup command line or on a per symbol file basis. Expand
1099 all partial symbol tables for this objfile if so. */
1101 if ((flags & OBJF_READNOW))
1103 if (from_tty || info_verbose)
1105 printf_unfiltered (_("expanding to full symbols..."));
1107 gdb_flush (gdb_stdout);
1111 objfile->sf->qf->expand_all_symtabs (objfile);
1114 if ((from_tty || info_verbose)
1115 && !objfile_has_symbols (objfile))
1118 printf_unfiltered (_("(no debugging symbols found)..."));
1122 if (from_tty || info_verbose)
1124 if (deprecated_post_add_symbol_hook)
1125 deprecated_post_add_symbol_hook ();
1127 printf_unfiltered (_("done.\n"));
1130 /* We print some messages regardless of whether 'from_tty ||
1131 info_verbose' is true, so make sure they go out at the right
1133 gdb_flush (gdb_stdout);
1135 do_cleanups (my_cleanups);
1137 if (objfile->sf == NULL)
1139 observer_notify_new_objfile (objfile);
1140 return objfile; /* No symbols. */
1143 new_symfile_objfile (objfile, add_flags);
1145 observer_notify_new_objfile (objfile);
1147 bfd_cache_close_all ();
1151 /* Add BFD as a separate debug file for OBJFILE. */
1154 symbol_file_add_separate (bfd *bfd, int symfile_flags, struct objfile *objfile)
1156 struct objfile *new_objfile;
1157 struct section_addr_info *sap;
1158 struct cleanup *my_cleanup;
1160 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1161 because sections of BFD may not match sections of OBJFILE and because
1162 vma may have been modified by tools such as prelink. */
1163 sap = build_section_addr_info_from_objfile (objfile);
1164 my_cleanup = make_cleanup_free_section_addr_info (sap);
1166 new_objfile = symbol_file_add_with_addrs_or_offsets
1167 (bfd, symfile_flags,
1169 objfile->flags & (OBJF_REORDERED | OBJF_SHARED | OBJF_READNOW
1170 | OBJF_USERLOADED));
1172 do_cleanups (my_cleanup);
1174 add_separate_debug_objfile (new_objfile, objfile);
1177 /* Process the symbol file ABFD, as either the main file or as a
1178 dynamically loaded file.
1180 See symbol_file_add_with_addrs_or_offsets's comments for
1183 symbol_file_add_from_bfd (bfd *abfd, int add_flags,
1184 struct section_addr_info *addrs,
1187 return symbol_file_add_with_addrs_or_offsets (abfd, add_flags, addrs, 0, 0,
1192 /* Process a symbol file, as either the main file or as a dynamically
1193 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
1196 symbol_file_add (char *name, int add_flags, struct section_addr_info *addrs,
1199 return symbol_file_add_from_bfd (symfile_bfd_open (name), add_flags, addrs,
1204 /* Call symbol_file_add() with default values and update whatever is
1205 affected by the loading of a new main().
1206 Used when the file is supplied in the gdb command line
1207 and by some targets with special loading requirements.
1208 The auxiliary function, symbol_file_add_main_1(), has the flags
1209 argument for the switches that can only be specified in the symbol_file
1213 symbol_file_add_main (char *args, int from_tty)
1215 symbol_file_add_main_1 (args, from_tty, 0);
1219 symbol_file_add_main_1 (char *args, int from_tty, int flags)
1221 const int add_flags = SYMFILE_MAINLINE | (from_tty ? SYMFILE_VERBOSE : 0);
1222 symbol_file_add (args, add_flags, NULL, flags);
1224 /* Getting new symbols may change our opinion about
1225 what is frameless. */
1226 reinit_frame_cache ();
1228 set_initial_language ();
1232 symbol_file_clear (int from_tty)
1234 if ((have_full_symbols () || have_partial_symbols ())
1237 ? !query (_("Discard symbol table from `%s'? "),
1238 symfile_objfile->name)
1239 : !query (_("Discard symbol table? "))))
1240 error (_("Not confirmed."));
1242 /* solib descriptors may have handles to objfiles. Wipe them before their
1243 objfiles get stale by free_all_objfiles. */
1244 no_shared_libraries (NULL, from_tty);
1246 free_all_objfiles ();
1248 gdb_assert (symfile_objfile == NULL);
1250 printf_unfiltered (_("No symbol file now.\n"));
1254 get_debug_link_info (struct objfile *objfile, unsigned long *crc32_out)
1257 bfd_size_type debuglink_size;
1258 unsigned long crc32;
1262 sect = bfd_get_section_by_name (objfile->obfd, ".gnu_debuglink");
1267 debuglink_size = bfd_section_size (objfile->obfd, sect);
1269 contents = xmalloc (debuglink_size);
1270 bfd_get_section_contents (objfile->obfd, sect, contents,
1271 (file_ptr)0, (bfd_size_type)debuglink_size);
1273 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1274 crc_offset = strlen (contents) + 1;
1275 crc_offset = (crc_offset + 3) & ~3;
1277 crc32 = bfd_get_32 (objfile->obfd, (bfd_byte *) (contents + crc_offset));
1284 separate_debug_file_exists (const char *name, unsigned long crc,
1285 struct objfile *parent_objfile)
1287 unsigned long file_crc = 0;
1289 gdb_byte buffer[8*1024];
1291 struct stat parent_stat, abfd_stat;
1293 /* Find a separate debug info file as if symbols would be present in
1294 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1295 section can contain just the basename of PARENT_OBJFILE without any
1296 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1297 the separate debug infos with the same basename can exist. */
1299 if (strcmp (name, parent_objfile->name) == 0)
1302 abfd = bfd_open_maybe_remote (name);
1307 /* Verify symlinks were not the cause of strcmp name difference above.
1309 Some operating systems, e.g. Windows, do not provide a meaningful
1310 st_ino; they always set it to zero. (Windows does provide a
1311 meaningful st_dev.) Do not indicate a duplicate library in that
1312 case. While there is no guarantee that a system that provides
1313 meaningful inode numbers will never set st_ino to zero, this is
1314 merely an optimization, so we do not need to worry about false
1317 if (bfd_stat (abfd, &abfd_stat) == 0
1318 && bfd_stat (parent_objfile->obfd, &parent_stat) == 0
1319 && abfd_stat.st_dev == parent_stat.st_dev
1320 && abfd_stat.st_ino == parent_stat.st_ino
1321 && abfd_stat.st_ino != 0)
1327 while ((count = bfd_bread (buffer, sizeof (buffer), abfd)) > 0)
1328 file_crc = gnu_debuglink_crc32 (file_crc, buffer, count);
1332 if (crc != file_crc)
1334 warning (_("the debug information found in \"%s\""
1335 " does not match \"%s\" (CRC mismatch).\n"),
1336 name, parent_objfile->name);
1343 char *debug_file_directory = NULL;
1345 show_debug_file_directory (struct ui_file *file, int from_tty,
1346 struct cmd_list_element *c, const char *value)
1348 fprintf_filtered (file, _("\
1349 The directory where separate debug symbols are searched for is \"%s\".\n"),
1353 #if ! defined (DEBUG_SUBDIRECTORY)
1354 #define DEBUG_SUBDIRECTORY ".debug"
1358 find_separate_debug_file_by_debuglink (struct objfile *objfile)
1360 char *basename, *debugdir;
1362 char *debugfile = NULL;
1363 char *canon_name = NULL;
1364 unsigned long crc32;
1367 basename = get_debug_link_info (objfile, &crc32);
1369 if (basename == NULL)
1370 /* There's no separate debug info, hence there's no way we could
1371 load it => no warning. */
1372 goto cleanup_return_debugfile;
1374 dir = xstrdup (objfile->name);
1376 /* Strip off the final filename part, leaving the directory name,
1377 followed by a slash. The directory can be relative or absolute. */
1378 for (i = strlen(dir) - 1; i >= 0; i--)
1380 if (IS_DIR_SEPARATOR (dir[i]))
1383 /* If I is -1 then no directory is present there and DIR will be "". */
1386 /* Set I to max (strlen (canon_name), strlen (dir)). */
1387 canon_name = lrealpath (dir);
1389 if (canon_name && strlen (canon_name) > i)
1390 i = strlen (canon_name);
1392 debugfile = xmalloc (strlen (debug_file_directory) + 1
1394 + strlen (DEBUG_SUBDIRECTORY)
1399 /* First try in the same directory as the original file. */
1400 strcpy (debugfile, dir);
1401 strcat (debugfile, basename);
1403 if (separate_debug_file_exists (debugfile, crc32, objfile))
1404 goto cleanup_return_debugfile;
1406 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1407 strcpy (debugfile, dir);
1408 strcat (debugfile, DEBUG_SUBDIRECTORY);
1409 strcat (debugfile, "/");
1410 strcat (debugfile, basename);
1412 if (separate_debug_file_exists (debugfile, crc32, objfile))
1413 goto cleanup_return_debugfile;
1415 /* Then try in the global debugfile directories.
1417 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1418 cause "/..." lookups. */
1420 debugdir = debug_file_directory;
1425 while (*debugdir == DIRNAME_SEPARATOR)
1428 debugdir_end = strchr (debugdir, DIRNAME_SEPARATOR);
1429 if (debugdir_end == NULL)
1430 debugdir_end = &debugdir[strlen (debugdir)];
1432 memcpy (debugfile, debugdir, debugdir_end - debugdir);
1433 debugfile[debugdir_end - debugdir] = 0;
1434 strcat (debugfile, "/");
1435 strcat (debugfile, dir);
1436 strcat (debugfile, basename);
1438 if (separate_debug_file_exists (debugfile, crc32, objfile))
1439 goto cleanup_return_debugfile;
1441 /* If the file is in the sysroot, try using its base path in the
1442 global debugfile directory. */
1444 && strncmp (canon_name, gdb_sysroot, strlen (gdb_sysroot)) == 0
1445 && IS_DIR_SEPARATOR (canon_name[strlen (gdb_sysroot)]))
1447 memcpy (debugfile, debugdir, debugdir_end - debugdir);
1448 debugfile[debugdir_end - debugdir] = 0;
1449 strcat (debugfile, canon_name + strlen (gdb_sysroot));
1450 strcat (debugfile, "/");
1451 strcat (debugfile, basename);
1453 if (separate_debug_file_exists (debugfile, crc32, objfile))
1454 goto cleanup_return_debugfile;
1457 debugdir = debugdir_end;
1459 while (*debugdir != 0);
1464 cleanup_return_debugfile:
1472 /* This is the symbol-file command. Read the file, analyze its
1473 symbols, and add a struct symtab to a symtab list. The syntax of
1474 the command is rather bizarre:
1476 1. The function buildargv implements various quoting conventions
1477 which are undocumented and have little or nothing in common with
1478 the way things are quoted (or not quoted) elsewhere in GDB.
1480 2. Options are used, which are not generally used in GDB (perhaps
1481 "set mapped on", "set readnow on" would be better)
1483 3. The order of options matters, which is contrary to GNU
1484 conventions (because it is confusing and inconvenient). */
1487 symbol_file_command (char *args, int from_tty)
1493 symbol_file_clear (from_tty);
1497 char **argv = gdb_buildargv (args);
1498 int flags = OBJF_USERLOADED;
1499 struct cleanup *cleanups;
1502 cleanups = make_cleanup_freeargv (argv);
1503 while (*argv != NULL)
1505 if (strcmp (*argv, "-readnow") == 0)
1506 flags |= OBJF_READNOW;
1507 else if (**argv == '-')
1508 error (_("unknown option `%s'"), *argv);
1511 symbol_file_add_main_1 (*argv, from_tty, flags);
1519 error (_("no symbol file name was specified"));
1521 do_cleanups (cleanups);
1525 /* Set the initial language.
1527 FIXME: A better solution would be to record the language in the
1528 psymtab when reading partial symbols, and then use it (if known) to
1529 set the language. This would be a win for formats that encode the
1530 language in an easily discoverable place, such as DWARF. For
1531 stabs, we can jump through hoops looking for specially named
1532 symbols or try to intuit the language from the specific type of
1533 stabs we find, but we can't do that until later when we read in
1537 set_initial_language (void)
1539 const char *filename;
1540 enum language lang = language_unknown;
1542 filename = find_main_filename ();
1543 if (filename != NULL)
1544 lang = deduce_language_from_filename (filename);
1546 if (lang == language_unknown)
1548 /* Make C the default language */
1552 set_language (lang);
1553 expected_language = current_language; /* Don't warn the user. */
1556 /* If NAME is a remote name open the file using remote protocol, otherwise
1557 open it normally. */
1560 bfd_open_maybe_remote (const char *name)
1562 if (remote_filename_p (name))
1563 return remote_bfd_open (name, gnutarget);
1565 return bfd_openr (name, gnutarget);
1569 /* Open the file specified by NAME and hand it off to BFD for
1570 preliminary analysis. Return a newly initialized bfd *, which
1571 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1572 absolute). In case of trouble, error() is called. */
1575 symfile_bfd_open (char *name)
1579 char *absolute_name;
1581 if (remote_filename_p (name))
1583 name = xstrdup (name);
1584 sym_bfd = remote_bfd_open (name, gnutarget);
1587 make_cleanup (xfree, name);
1588 error (_("`%s': can't open to read symbols: %s."), name,
1589 bfd_errmsg (bfd_get_error ()));
1592 if (!bfd_check_format (sym_bfd, bfd_object))
1594 bfd_close (sym_bfd);
1595 make_cleanup (xfree, name);
1596 error (_("`%s': can't read symbols: %s."), name,
1597 bfd_errmsg (bfd_get_error ()));
1603 name = tilde_expand (name); /* Returns 1st new malloc'd copy. */
1605 /* Look down path for it, allocate 2nd new malloc'd copy. */
1606 desc = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, name,
1607 O_RDONLY | O_BINARY, &absolute_name);
1608 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1611 char *exename = alloca (strlen (name) + 5);
1613 strcat (strcpy (exename, name), ".exe");
1614 desc = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, exename,
1615 O_RDONLY | O_BINARY, &absolute_name);
1620 make_cleanup (xfree, name);
1621 perror_with_name (name);
1624 /* Free 1st new malloc'd copy, but keep the 2nd malloc'd copy in
1625 bfd. It'll be freed in free_objfile(). */
1627 name = absolute_name;
1629 sym_bfd = bfd_fopen (name, gnutarget, FOPEN_RB, desc);
1633 make_cleanup (xfree, name);
1634 error (_("`%s': can't open to read symbols: %s."), name,
1635 bfd_errmsg (bfd_get_error ()));
1637 bfd_set_cacheable (sym_bfd, 1);
1639 if (!bfd_check_format (sym_bfd, bfd_object))
1641 /* FIXME: should be checking for errors from bfd_close (for one
1642 thing, on error it does not free all the storage associated
1644 bfd_close (sym_bfd); /* This also closes desc. */
1645 make_cleanup (xfree, name);
1646 error (_("`%s': can't read symbols: %s."), name,
1647 bfd_errmsg (bfd_get_error ()));
1650 /* bfd_usrdata exists for applications and libbfd must not touch it. */
1651 gdb_assert (bfd_usrdata (sym_bfd) == NULL);
1656 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1657 the section was not found. */
1660 get_section_index (struct objfile *objfile, char *section_name)
1662 asection *sect = bfd_get_section_by_name (objfile->obfd, section_name);
1670 /* Link SF into the global symtab_fns list. Called on startup by the
1671 _initialize routine in each object file format reader, to register
1672 information about each format the the reader is prepared to
1676 add_symtab_fns (struct sym_fns *sf)
1678 sf->next = symtab_fns;
1682 /* Initialize OBJFILE to read symbols from its associated BFD. It
1683 either returns or calls error(). The result is an initialized
1684 struct sym_fns in the objfile structure, that contains cached
1685 information about the symbol file. */
1687 static struct sym_fns *
1688 find_sym_fns (bfd *abfd)
1691 enum bfd_flavour our_flavour = bfd_get_flavour (abfd);
1693 if (our_flavour == bfd_target_srec_flavour
1694 || our_flavour == bfd_target_ihex_flavour
1695 || our_flavour == bfd_target_tekhex_flavour)
1696 return NULL; /* No symbols. */
1698 for (sf = symtab_fns; sf != NULL; sf = sf->next)
1699 if (our_flavour == sf->sym_flavour)
1702 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1703 bfd_get_target (abfd));
1707 /* This function runs the load command of our current target. */
1710 load_command (char *arg, int from_tty)
1712 /* The user might be reloading because the binary has changed. Take
1713 this opportunity to check. */
1714 reopen_exec_file ();
1722 parg = arg = get_exec_file (1);
1724 /* Count how many \ " ' tab space there are in the name. */
1725 while ((parg = strpbrk (parg, "\\\"'\t ")))
1733 /* We need to quote this string so buildargv can pull it apart. */
1734 char *temp = xmalloc (strlen (arg) + count + 1 );
1738 make_cleanup (xfree, temp);
1741 while ((parg = strpbrk (parg, "\\\"'\t ")))
1743 strncpy (ptemp, prev, parg - prev);
1744 ptemp += parg - prev;
1748 strcpy (ptemp, prev);
1754 target_load (arg, from_tty);
1756 /* After re-loading the executable, we don't really know which
1757 overlays are mapped any more. */
1758 overlay_cache_invalid = 1;
1761 /* This version of "load" should be usable for any target. Currently
1762 it is just used for remote targets, not inftarg.c or core files,
1763 on the theory that only in that case is it useful.
1765 Avoiding xmodem and the like seems like a win (a) because we don't have
1766 to worry about finding it, and (b) On VMS, fork() is very slow and so
1767 we don't want to run a subprocess. On the other hand, I'm not sure how
1768 performance compares. */
1770 static int validate_download = 0;
1772 /* Callback service function for generic_load (bfd_map_over_sections). */
1775 add_section_size_callback (bfd *abfd, asection *asec, void *data)
1777 bfd_size_type *sum = data;
1779 *sum += bfd_get_section_size (asec);
1782 /* Opaque data for load_section_callback. */
1783 struct load_section_data {
1784 unsigned long load_offset;
1785 struct load_progress_data *progress_data;
1786 VEC(memory_write_request_s) *requests;
1789 /* Opaque data for load_progress. */
1790 struct load_progress_data {
1791 /* Cumulative data. */
1792 unsigned long write_count;
1793 unsigned long data_count;
1794 bfd_size_type total_size;
1797 /* Opaque data for load_progress for a single section. */
1798 struct load_progress_section_data {
1799 struct load_progress_data *cumulative;
1801 /* Per-section data. */
1802 const char *section_name;
1803 ULONGEST section_sent;
1804 ULONGEST section_size;
1809 /* Target write callback routine for progress reporting. */
1812 load_progress (ULONGEST bytes, void *untyped_arg)
1814 struct load_progress_section_data *args = untyped_arg;
1815 struct load_progress_data *totals;
1818 /* Writing padding data. No easy way to get at the cumulative
1819 stats, so just ignore this. */
1822 totals = args->cumulative;
1824 if (bytes == 0 && args->section_sent == 0)
1826 /* The write is just starting. Let the user know we've started
1828 ui_out_message (uiout, 0, "Loading section %s, size %s lma %s\n",
1829 args->section_name, hex_string (args->section_size),
1830 paddress (target_gdbarch, args->lma));
1834 if (validate_download)
1836 /* Broken memories and broken monitors manifest themselves here
1837 when bring new computers to life. This doubles already slow
1839 /* NOTE: cagney/1999-10-18: A more efficient implementation
1840 might add a verify_memory() method to the target vector and
1841 then use that. remote.c could implement that method using
1842 the ``qCRC'' packet. */
1843 gdb_byte *check = xmalloc (bytes);
1844 struct cleanup *verify_cleanups = make_cleanup (xfree, check);
1846 if (target_read_memory (args->lma, check, bytes) != 0)
1847 error (_("Download verify read failed at %s"),
1848 paddress (target_gdbarch, args->lma));
1849 if (memcmp (args->buffer, check, bytes) != 0)
1850 error (_("Download verify compare failed at %s"),
1851 paddress (target_gdbarch, args->lma));
1852 do_cleanups (verify_cleanups);
1854 totals->data_count += bytes;
1856 args->buffer += bytes;
1857 totals->write_count += 1;
1858 args->section_sent += bytes;
1860 || (deprecated_ui_load_progress_hook != NULL
1861 && deprecated_ui_load_progress_hook (args->section_name,
1862 args->section_sent)))
1863 error (_("Canceled the download"));
1865 if (deprecated_show_load_progress != NULL)
1866 deprecated_show_load_progress (args->section_name,
1870 totals->total_size);
1873 /* Callback service function for generic_load (bfd_map_over_sections). */
1876 load_section_callback (bfd *abfd, asection *asec, void *data)
1878 struct memory_write_request *new_request;
1879 struct load_section_data *args = data;
1880 struct load_progress_section_data *section_data;
1881 bfd_size_type size = bfd_get_section_size (asec);
1883 const char *sect_name = bfd_get_section_name (abfd, asec);
1885 if ((bfd_get_section_flags (abfd, asec) & SEC_LOAD) == 0)
1891 new_request = VEC_safe_push (memory_write_request_s,
1892 args->requests, NULL);
1893 memset (new_request, 0, sizeof (struct memory_write_request));
1894 section_data = xcalloc (1, sizeof (struct load_progress_section_data));
1895 new_request->begin = bfd_section_lma (abfd, asec) + args->load_offset;
1896 new_request->end = new_request->begin + size; /* FIXME Should size be in instead? */
1897 new_request->data = xmalloc (size);
1898 new_request->baton = section_data;
1900 buffer = new_request->data;
1902 section_data->cumulative = args->progress_data;
1903 section_data->section_name = sect_name;
1904 section_data->section_size = size;
1905 section_data->lma = new_request->begin;
1906 section_data->buffer = buffer;
1908 bfd_get_section_contents (abfd, asec, buffer, 0, size);
1911 /* Clean up an entire memory request vector, including load
1912 data and progress records. */
1915 clear_memory_write_data (void *arg)
1917 VEC(memory_write_request_s) **vec_p = arg;
1918 VEC(memory_write_request_s) *vec = *vec_p;
1920 struct memory_write_request *mr;
1922 for (i = 0; VEC_iterate (memory_write_request_s, vec, i, mr); ++i)
1927 VEC_free (memory_write_request_s, vec);
1931 generic_load (char *args, int from_tty)
1934 struct timeval start_time, end_time;
1936 struct cleanup *old_cleanups = make_cleanup (null_cleanup, 0);
1937 struct load_section_data cbdata;
1938 struct load_progress_data total_progress;
1943 memset (&cbdata, 0, sizeof (cbdata));
1944 memset (&total_progress, 0, sizeof (total_progress));
1945 cbdata.progress_data = &total_progress;
1947 make_cleanup (clear_memory_write_data, &cbdata.requests);
1950 error_no_arg (_("file to load"));
1952 argv = gdb_buildargv (args);
1953 make_cleanup_freeargv (argv);
1955 filename = tilde_expand (argv[0]);
1956 make_cleanup (xfree, filename);
1958 if (argv[1] != NULL)
1962 cbdata.load_offset = strtoul (argv[1], &endptr, 0);
1964 /* If the last word was not a valid number then
1965 treat it as a file name with spaces in. */
1966 if (argv[1] == endptr)
1967 error (_("Invalid download offset:%s."), argv[1]);
1969 if (argv[2] != NULL)
1970 error (_("Too many parameters."));
1973 /* Open the file for loading. */
1974 loadfile_bfd = bfd_openr (filename, gnutarget);
1975 if (loadfile_bfd == NULL)
1977 perror_with_name (filename);
1981 /* FIXME: should be checking for errors from bfd_close (for one thing,
1982 on error it does not free all the storage associated with the
1984 make_cleanup_bfd_close (loadfile_bfd);
1986 if (!bfd_check_format (loadfile_bfd, bfd_object))
1988 error (_("\"%s\" is not an object file: %s"), filename,
1989 bfd_errmsg (bfd_get_error ()));
1992 bfd_map_over_sections (loadfile_bfd, add_section_size_callback,
1993 (void *) &total_progress.total_size);
1995 bfd_map_over_sections (loadfile_bfd, load_section_callback, &cbdata);
1997 gettimeofday (&start_time, NULL);
1999 if (target_write_memory_blocks (cbdata.requests, flash_discard,
2000 load_progress) != 0)
2001 error (_("Load failed"));
2003 gettimeofday (&end_time, NULL);
2005 entry = bfd_get_start_address (loadfile_bfd);
2006 ui_out_text (uiout, "Start address ");
2007 ui_out_field_fmt (uiout, "address", "%s", paddress (target_gdbarch, entry));
2008 ui_out_text (uiout, ", load size ");
2009 ui_out_field_fmt (uiout, "load-size", "%lu", total_progress.data_count);
2010 ui_out_text (uiout, "\n");
2011 /* We were doing this in remote-mips.c, I suspect it is right
2012 for other targets too. */
2013 regcache_write_pc (get_current_regcache (), entry);
2015 /* Reset breakpoints, now that we have changed the load image. For
2016 instance, breakpoints may have been set (or reset, by
2017 post_create_inferior) while connected to the target but before we
2018 loaded the program. In that case, the prologue analyzer could
2019 have read instructions from the target to find the right
2020 breakpoint locations. Loading has changed the contents of that
2023 breakpoint_re_set ();
2025 /* FIXME: are we supposed to call symbol_file_add or not? According
2026 to a comment from remote-mips.c (where a call to symbol_file_add
2027 was commented out), making the call confuses GDB if more than one
2028 file is loaded in. Some targets do (e.g., remote-vx.c) but
2029 others don't (or didn't - perhaps they have all been deleted). */
2031 print_transfer_performance (gdb_stdout, total_progress.data_count,
2032 total_progress.write_count,
2033 &start_time, &end_time);
2035 do_cleanups (old_cleanups);
2038 /* Report how fast the transfer went. */
2040 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
2041 replaced by print_transfer_performance (with a very different
2042 function signature). */
2045 report_transfer_performance (unsigned long data_count, time_t start_time,
2048 struct timeval start, end;
2050 start.tv_sec = start_time;
2052 end.tv_sec = end_time;
2055 print_transfer_performance (gdb_stdout, data_count, 0, &start, &end);
2059 print_transfer_performance (struct ui_file *stream,
2060 unsigned long data_count,
2061 unsigned long write_count,
2062 const struct timeval *start_time,
2063 const struct timeval *end_time)
2065 ULONGEST time_count;
2067 /* Compute the elapsed time in milliseconds, as a tradeoff between
2068 accuracy and overflow. */
2069 time_count = (end_time->tv_sec - start_time->tv_sec) * 1000;
2070 time_count += (end_time->tv_usec - start_time->tv_usec) / 1000;
2072 ui_out_text (uiout, "Transfer rate: ");
2075 unsigned long rate = ((ULONGEST) data_count * 1000) / time_count;
2077 if (ui_out_is_mi_like_p (uiout))
2079 ui_out_field_fmt (uiout, "transfer-rate", "%lu", rate * 8);
2080 ui_out_text (uiout, " bits/sec");
2082 else if (rate < 1024)
2084 ui_out_field_fmt (uiout, "transfer-rate", "%lu", rate);
2085 ui_out_text (uiout, " bytes/sec");
2089 ui_out_field_fmt (uiout, "transfer-rate", "%lu", rate / 1024);
2090 ui_out_text (uiout, " KB/sec");
2095 ui_out_field_fmt (uiout, "transferred-bits", "%lu", (data_count * 8));
2096 ui_out_text (uiout, " bits in <1 sec");
2098 if (write_count > 0)
2100 ui_out_text (uiout, ", ");
2101 ui_out_field_fmt (uiout, "write-rate", "%lu", data_count / write_count);
2102 ui_out_text (uiout, " bytes/write");
2104 ui_out_text (uiout, ".\n");
2107 /* This function allows the addition of incrementally linked object files.
2108 It does not modify any state in the target, only in the debugger. */
2109 /* Note: ezannoni 2000-04-13 This function/command used to have a
2110 special case syntax for the rombug target (Rombug is the boot
2111 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2112 rombug case, the user doesn't need to supply a text address,
2113 instead a call to target_link() (in target.c) would supply the
2114 value to use. We are now discontinuing this type of ad hoc syntax. */
2117 add_symbol_file_command (char *args, int from_tty)
2119 struct gdbarch *gdbarch = get_current_arch ();
2120 char *filename = NULL;
2121 int flags = OBJF_USERLOADED;
2123 int section_index = 0;
2127 int expecting_sec_name = 0;
2128 int expecting_sec_addr = 0;
2137 struct section_addr_info *section_addrs;
2138 struct sect_opt *sect_opts = NULL;
2139 size_t num_sect_opts = 0;
2140 struct cleanup *my_cleanups = make_cleanup (null_cleanup, NULL);
2143 sect_opts = (struct sect_opt *) xmalloc (num_sect_opts
2144 * sizeof (struct sect_opt));
2149 error (_("add-symbol-file takes a file name and an address"));
2151 argv = gdb_buildargv (args);
2152 make_cleanup_freeargv (argv);
2154 for (arg = argv[0], argcnt = 0; arg != NULL; arg = argv[++argcnt])
2156 /* Process the argument. */
2159 /* The first argument is the file name. */
2160 filename = tilde_expand (arg);
2161 make_cleanup (xfree, filename);
2166 /* The second argument is always the text address at which
2167 to load the program. */
2168 sect_opts[section_index].name = ".text";
2169 sect_opts[section_index].value = arg;
2170 if (++section_index >= num_sect_opts)
2173 sect_opts = ((struct sect_opt *)
2174 xrealloc (sect_opts,
2176 * sizeof (struct sect_opt)));
2181 /* It's an option (starting with '-') or it's an argument
2186 if (strcmp (arg, "-readnow") == 0)
2187 flags |= OBJF_READNOW;
2188 else if (strcmp (arg, "-s") == 0)
2190 expecting_sec_name = 1;
2191 expecting_sec_addr = 1;
2196 if (expecting_sec_name)
2198 sect_opts[section_index].name = arg;
2199 expecting_sec_name = 0;
2202 if (expecting_sec_addr)
2204 sect_opts[section_index].value = arg;
2205 expecting_sec_addr = 0;
2206 if (++section_index >= num_sect_opts)
2209 sect_opts = ((struct sect_opt *)
2210 xrealloc (sect_opts,
2212 * sizeof (struct sect_opt)));
2216 error (_("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*"));
2221 /* This command takes at least two arguments. The first one is a
2222 filename, and the second is the address where this file has been
2223 loaded. Abort now if this address hasn't been provided by the
2225 if (section_index < 1)
2226 error (_("The address where %s has been loaded is missing"), filename);
2228 /* Print the prompt for the query below. And save the arguments into
2229 a sect_addr_info structure to be passed around to other
2230 functions. We have to split this up into separate print
2231 statements because hex_string returns a local static
2234 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename);
2235 section_addrs = alloc_section_addr_info (section_index);
2236 make_cleanup (xfree, section_addrs);
2237 for (i = 0; i < section_index; i++)
2240 char *val = sect_opts[i].value;
2241 char *sec = sect_opts[i].name;
2243 addr = parse_and_eval_address (val);
2245 /* Here we store the section offsets in the order they were
2246 entered on the command line. */
2247 section_addrs->other[sec_num].name = sec;
2248 section_addrs->other[sec_num].addr = addr;
2249 printf_unfiltered ("\t%s_addr = %s\n", sec,
2250 paddress (gdbarch, addr));
2253 /* The object's sections are initialized when a
2254 call is made to build_objfile_section_table (objfile).
2255 This happens in reread_symbols.
2256 At this point, we don't know what file type this is,
2257 so we can't determine what section names are valid. */
2260 if (from_tty && (!query ("%s", "")))
2261 error (_("Not confirmed."));
2263 symbol_file_add (filename, from_tty ? SYMFILE_VERBOSE : 0,
2264 section_addrs, flags);
2266 /* Getting new symbols may change our opinion about what is
2268 reinit_frame_cache ();
2269 do_cleanups (my_cleanups);
2273 /* Re-read symbols if a symbol-file has changed. */
2275 reread_symbols (void)
2277 struct objfile *objfile;
2280 struct stat new_statbuf;
2283 /* With the addition of shared libraries, this should be modified,
2284 the load time should be saved in the partial symbol tables, since
2285 different tables may come from different source files. FIXME.
2286 This routine should then walk down each partial symbol table
2287 and see if the symbol table that it originates from has been changed */
2289 for (objfile = object_files; objfile; objfile = objfile->next)
2291 /* solib-sunos.c creates one objfile with obfd. */
2292 if (objfile->obfd == NULL)
2295 /* Separate debug objfiles are handled in the main objfile. */
2296 if (objfile->separate_debug_objfile_backlink)
2299 /* If this object is from an archive (what you usually create with
2300 `ar', often called a `static library' on most systems, though
2301 a `shared library' on AIX is also an archive), then you should
2302 stat on the archive name, not member name. */
2303 if (objfile->obfd->my_archive)
2304 res = stat (objfile->obfd->my_archive->filename, &new_statbuf);
2306 res = stat (objfile->name, &new_statbuf);
2309 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2310 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2314 new_modtime = new_statbuf.st_mtime;
2315 if (new_modtime != objfile->mtime)
2317 struct cleanup *old_cleanups;
2318 struct section_offsets *offsets;
2320 char *obfd_filename;
2322 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2325 /* There are various functions like symbol_file_add,
2326 symfile_bfd_open, syms_from_objfile, etc., which might
2327 appear to do what we want. But they have various other
2328 effects which we *don't* want. So we just do stuff
2329 ourselves. We don't worry about mapped files (for one thing,
2330 any mapped file will be out of date). */
2332 /* If we get an error, blow away this objfile (not sure if
2333 that is the correct response for things like shared
2335 old_cleanups = make_cleanup_free_objfile (objfile);
2336 /* We need to do this whenever any symbols go away. */
2337 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
2339 if (exec_bfd != NULL && strcmp (bfd_get_filename (objfile->obfd),
2340 bfd_get_filename (exec_bfd)) == 0)
2342 /* Reload EXEC_BFD without asking anything. */
2344 exec_file_attach (bfd_get_filename (objfile->obfd), 0);
2347 /* Clean up any state BFD has sitting around. We don't need
2348 to close the descriptor but BFD lacks a way of closing the
2349 BFD without closing the descriptor. */
2350 obfd_filename = bfd_get_filename (objfile->obfd);
2351 if (!bfd_close (objfile->obfd))
2352 error (_("Can't close BFD for %s: %s"), objfile->name,
2353 bfd_errmsg (bfd_get_error ()));
2354 objfile->obfd = bfd_open_maybe_remote (obfd_filename);
2355 if (objfile->obfd == NULL)
2356 error (_("Can't open %s to read symbols."), objfile->name);
2358 objfile->obfd = gdb_bfd_ref (objfile->obfd);
2359 /* bfd_openr sets cacheable to true, which is what we want. */
2360 if (!bfd_check_format (objfile->obfd, bfd_object))
2361 error (_("Can't read symbols from %s: %s."), objfile->name,
2362 bfd_errmsg (bfd_get_error ()));
2364 /* Save the offsets, we will nuke them with the rest of the
2366 num_offsets = objfile->num_sections;
2367 offsets = ((struct section_offsets *)
2368 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets)));
2369 memcpy (offsets, objfile->section_offsets,
2370 SIZEOF_N_SECTION_OFFSETS (num_offsets));
2372 /* Remove any references to this objfile in the global
2374 preserve_values (objfile);
2376 /* Nuke all the state that we will re-read. Much of the following
2377 code which sets things to NULL really is necessary to tell
2378 other parts of GDB that there is nothing currently there.
2380 Try to keep the freeing order compatible with free_objfile. */
2382 if (objfile->sf != NULL)
2384 (*objfile->sf->sym_finish) (objfile);
2387 clear_objfile_data (objfile);
2389 /* Free the separate debug objfiles. It will be
2390 automatically recreated by sym_read. */
2391 free_objfile_separate_debug (objfile);
2393 /* FIXME: Do we have to free a whole linked list, or is this
2395 if (objfile->global_psymbols.list)
2396 xfree (objfile->global_psymbols.list);
2397 memset (&objfile->global_psymbols, 0,
2398 sizeof (objfile->global_psymbols));
2399 if (objfile->static_psymbols.list)
2400 xfree (objfile->static_psymbols.list);
2401 memset (&objfile->static_psymbols, 0,
2402 sizeof (objfile->static_psymbols));
2404 /* Free the obstacks for non-reusable objfiles */
2405 bcache_xfree (objfile->psymbol_cache);
2406 objfile->psymbol_cache = bcache_xmalloc ();
2407 bcache_xfree (objfile->macro_cache);
2408 objfile->macro_cache = bcache_xmalloc ();
2409 bcache_xfree (objfile->filename_cache);
2410 objfile->filename_cache = bcache_xmalloc ();
2411 if (objfile->demangled_names_hash != NULL)
2413 htab_delete (objfile->demangled_names_hash);
2414 objfile->demangled_names_hash = NULL;
2416 obstack_free (&objfile->objfile_obstack, 0);
2417 objfile->sections = NULL;
2418 objfile->symtabs = NULL;
2419 objfile->psymtabs = NULL;
2420 objfile->psymtabs_addrmap = NULL;
2421 objfile->free_psymtabs = NULL;
2422 objfile->cp_namespace_symtab = NULL;
2423 objfile->template_symbols = NULL;
2424 objfile->msymbols = NULL;
2425 objfile->deprecated_sym_private = NULL;
2426 objfile->minimal_symbol_count = 0;
2427 memset (&objfile->msymbol_hash, 0,
2428 sizeof (objfile->msymbol_hash));
2429 memset (&objfile->msymbol_demangled_hash, 0,
2430 sizeof (objfile->msymbol_demangled_hash));
2432 objfile->psymbol_cache = bcache_xmalloc ();
2433 objfile->macro_cache = bcache_xmalloc ();
2434 objfile->filename_cache = bcache_xmalloc ();
2435 /* obstack_init also initializes the obstack so it is
2436 empty. We could use obstack_specify_allocation but
2437 gdb_obstack.h specifies the alloc/dealloc
2439 obstack_init (&objfile->objfile_obstack);
2440 if (build_objfile_section_table (objfile))
2442 error (_("Can't find the file sections in `%s': %s"),
2443 objfile->name, bfd_errmsg (bfd_get_error ()));
2445 terminate_minimal_symbol_table (objfile);
2447 /* We use the same section offsets as from last time. I'm not
2448 sure whether that is always correct for shared libraries. */
2449 objfile->section_offsets = (struct section_offsets *)
2450 obstack_alloc (&objfile->objfile_obstack,
2451 SIZEOF_N_SECTION_OFFSETS (num_offsets));
2452 memcpy (objfile->section_offsets, offsets,
2453 SIZEOF_N_SECTION_OFFSETS (num_offsets));
2454 objfile->num_sections = num_offsets;
2456 /* What the hell is sym_new_init for, anyway? The concept of
2457 distinguishing between the main file and additional files
2458 in this way seems rather dubious. */
2459 if (objfile == symfile_objfile)
2461 (*objfile->sf->sym_new_init) (objfile);
2464 (*objfile->sf->sym_init) (objfile);
2465 clear_complaints (&symfile_complaints, 1, 1);
2466 /* Do not set flags as this is safe and we don't want to be
2468 (*objfile->sf->sym_read) (objfile, 0);
2469 if (!objfile_has_symbols (objfile))
2472 printf_unfiltered (_("(no debugging symbols found)\n"));
2476 /* We're done reading the symbol file; finish off complaints. */
2477 clear_complaints (&symfile_complaints, 0, 1);
2479 /* Getting new symbols may change our opinion about what is
2482 reinit_frame_cache ();
2484 /* Discard cleanups as symbol reading was successful. */
2485 discard_cleanups (old_cleanups);
2487 /* If the mtime has changed between the time we set new_modtime
2488 and now, we *want* this to be out of date, so don't call stat
2490 objfile->mtime = new_modtime;
2492 init_entry_point_info (objfile);
2498 /* Notify objfiles that we've modified objfile sections. */
2499 objfiles_changed ();
2501 clear_symtab_users ();
2502 /* At least one objfile has changed, so we can consider that
2503 the executable we're debugging has changed too. */
2504 observer_notify_executable_changed ();
2517 static filename_language *filename_language_table;
2518 static int fl_table_size, fl_table_next;
2521 add_filename_language (char *ext, enum language lang)
2523 if (fl_table_next >= fl_table_size)
2525 fl_table_size += 10;
2526 filename_language_table =
2527 xrealloc (filename_language_table,
2528 fl_table_size * sizeof (*filename_language_table));
2531 filename_language_table[fl_table_next].ext = xstrdup (ext);
2532 filename_language_table[fl_table_next].lang = lang;
2536 static char *ext_args;
2538 show_ext_args (struct ui_file *file, int from_tty,
2539 struct cmd_list_element *c, const char *value)
2541 fprintf_filtered (file, _("\
2542 Mapping between filename extension and source language is \"%s\".\n"),
2547 set_ext_lang_command (char *args, int from_tty, struct cmd_list_element *e)
2550 char *cp = ext_args;
2553 /* First arg is filename extension, starting with '.' */
2555 error (_("'%s': Filename extension must begin with '.'"), ext_args);
2557 /* Find end of first arg. */
2558 while (*cp && !isspace (*cp))
2562 error (_("'%s': two arguments required -- filename extension and language"),
2565 /* Null-terminate first arg */
2568 /* Find beginning of second arg, which should be a source language. */
2569 while (*cp && isspace (*cp))
2573 error (_("'%s': two arguments required -- filename extension and language"),
2576 /* Lookup the language from among those we know. */
2577 lang = language_enum (cp);
2579 /* Now lookup the filename extension: do we already know it? */
2580 for (i = 0; i < fl_table_next; i++)
2581 if (0 == strcmp (ext_args, filename_language_table[i].ext))
2584 if (i >= fl_table_next)
2586 /* new file extension */
2587 add_filename_language (ext_args, lang);
2591 /* redefining a previously known filename extension */
2594 /* query ("Really make files of type %s '%s'?", */
2595 /* ext_args, language_str (lang)); */
2597 xfree (filename_language_table[i].ext);
2598 filename_language_table[i].ext = xstrdup (ext_args);
2599 filename_language_table[i].lang = lang;
2604 info_ext_lang_command (char *args, int from_tty)
2608 printf_filtered (_("Filename extensions and the languages they represent:"));
2609 printf_filtered ("\n\n");
2610 for (i = 0; i < fl_table_next; i++)
2611 printf_filtered ("\t%s\t- %s\n",
2612 filename_language_table[i].ext,
2613 language_str (filename_language_table[i].lang));
2617 init_filename_language_table (void)
2619 if (fl_table_size == 0) /* protect against repetition */
2623 filename_language_table =
2624 xmalloc (fl_table_size * sizeof (*filename_language_table));
2625 add_filename_language (".c", language_c);
2626 add_filename_language (".d", language_d);
2627 add_filename_language (".C", language_cplus);
2628 add_filename_language (".cc", language_cplus);
2629 add_filename_language (".cp", language_cplus);
2630 add_filename_language (".cpp", language_cplus);
2631 add_filename_language (".cxx", language_cplus);
2632 add_filename_language (".c++", language_cplus);
2633 add_filename_language (".java", language_java);
2634 add_filename_language (".class", language_java);
2635 add_filename_language (".m", language_objc);
2636 add_filename_language (".f", language_fortran);
2637 add_filename_language (".F", language_fortran);
2638 add_filename_language (".for", language_fortran);
2639 add_filename_language (".FOR", language_fortran);
2640 add_filename_language (".ftn", language_fortran);
2641 add_filename_language (".FTN", language_fortran);
2642 add_filename_language (".fpp", language_fortran);
2643 add_filename_language (".FPP", language_fortran);
2644 add_filename_language (".f90", language_fortran);
2645 add_filename_language (".F90", language_fortran);
2646 add_filename_language (".f95", language_fortran);
2647 add_filename_language (".F95", language_fortran);
2648 add_filename_language (".f03", language_fortran);
2649 add_filename_language (".F03", language_fortran);
2650 add_filename_language (".f08", language_fortran);
2651 add_filename_language (".F08", language_fortran);
2652 add_filename_language (".s", language_asm);
2653 add_filename_language (".sx", language_asm);
2654 add_filename_language (".S", language_asm);
2655 add_filename_language (".pas", language_pascal);
2656 add_filename_language (".p", language_pascal);
2657 add_filename_language (".pp", language_pascal);
2658 add_filename_language (".adb", language_ada);
2659 add_filename_language (".ads", language_ada);
2660 add_filename_language (".a", language_ada);
2661 add_filename_language (".ada", language_ada);
2662 add_filename_language (".dg", language_ada);
2667 deduce_language_from_filename (const char *filename)
2672 if (filename != NULL)
2673 if ((cp = strrchr (filename, '.')) != NULL)
2674 for (i = 0; i < fl_table_next; i++)
2675 if (strcmp (cp, filename_language_table[i].ext) == 0)
2676 return filename_language_table[i].lang;
2678 return language_unknown;
2683 Allocate and partly initialize a new symbol table. Return a pointer
2684 to it. error() if no space.
2686 Caller must set these fields:
2695 allocate_symtab (char *filename, struct objfile *objfile)
2697 struct symtab *symtab;
2699 symtab = (struct symtab *)
2700 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symtab));
2701 memset (symtab, 0, sizeof (*symtab));
2702 symtab->filename = (char *) bcache (filename, strlen (filename) + 1,
2703 objfile->filename_cache);
2704 symtab->fullname = NULL;
2705 symtab->language = deduce_language_from_filename (filename);
2706 symtab->debugformat = "unknown";
2708 /* Hook it to the objfile it comes from */
2710 symtab->objfile = objfile;
2711 symtab->next = objfile->symtabs;
2712 objfile->symtabs = symtab;
2718 /* Reset all data structures in gdb which may contain references to symbol
2722 clear_symtab_users (void)
2724 /* Someday, we should do better than this, by only blowing away
2725 the things that really need to be blown. */
2727 /* Clear the "current" symtab first, because it is no longer valid.
2728 breakpoint_re_set may try to access the current symtab. */
2729 clear_current_source_symtab_and_line ();
2732 breakpoint_re_set ();
2733 set_default_breakpoint (0, NULL, 0, 0, 0);
2734 clear_pc_function_cache ();
2735 observer_notify_new_objfile (NULL);
2737 /* Clear globals which might have pointed into a removed objfile.
2738 FIXME: It's not clear which of these are supposed to persist
2739 between expressions and which ought to be reset each time. */
2740 expression_context_block = NULL;
2741 innermost_block = NULL;
2743 /* Varobj may refer to old symbols, perform a cleanup. */
2744 varobj_invalidate ();
2749 clear_symtab_users_cleanup (void *ignore)
2751 clear_symtab_users ();
2755 The following code implements an abstraction for debugging overlay sections.
2757 The target model is as follows:
2758 1) The gnu linker will permit multiple sections to be mapped into the
2759 same VMA, each with its own unique LMA (or load address).
2760 2) It is assumed that some runtime mechanism exists for mapping the
2761 sections, one by one, from the load address into the VMA address.
2762 3) This code provides a mechanism for gdb to keep track of which
2763 sections should be considered to be mapped from the VMA to the LMA.
2764 This information is used for symbol lookup, and memory read/write.
2765 For instance, if a section has been mapped then its contents
2766 should be read from the VMA, otherwise from the LMA.
2768 Two levels of debugger support for overlays are available. One is
2769 "manual", in which the debugger relies on the user to tell it which
2770 overlays are currently mapped. This level of support is
2771 implemented entirely in the core debugger, and the information about
2772 whether a section is mapped is kept in the objfile->obj_section table.
2774 The second level of support is "automatic", and is only available if
2775 the target-specific code provides functionality to read the target's
2776 overlay mapping table, and translate its contents for the debugger
2777 (by updating the mapped state information in the obj_section tables).
2779 The interface is as follows:
2781 overlay map <name> -- tell gdb to consider this section mapped
2782 overlay unmap <name> -- tell gdb to consider this section unmapped
2783 overlay list -- list the sections that GDB thinks are mapped
2784 overlay read-target -- get the target's state of what's mapped
2785 overlay off/manual/auto -- set overlay debugging state
2786 Functional interface:
2787 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2788 section, return that section.
2789 find_pc_overlay(pc): find any overlay section that contains
2790 the pc, either in its VMA or its LMA
2791 section_is_mapped(sect): true if overlay is marked as mapped
2792 section_is_overlay(sect): true if section's VMA != LMA
2793 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2794 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2795 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2796 overlay_mapped_address(...): map an address from section's LMA to VMA
2797 overlay_unmapped_address(...): map an address from section's VMA to LMA
2798 symbol_overlayed_address(...): Return a "current" address for symbol:
2799 either in VMA or LMA depending on whether
2800 the symbol's section is currently mapped
2803 /* Overlay debugging state: */
2805 enum overlay_debugging_state overlay_debugging = ovly_off;
2806 int overlay_cache_invalid = 0; /* True if need to refresh mapped state */
2808 /* Function: section_is_overlay (SECTION)
2809 Returns true if SECTION has VMA not equal to LMA, ie.
2810 SECTION is loaded at an address different from where it will "run". */
2813 section_is_overlay (struct obj_section *section)
2815 if (overlay_debugging && section)
2817 bfd *abfd = section->objfile->obfd;
2818 asection *bfd_section = section->the_bfd_section;
2820 if (bfd_section_lma (abfd, bfd_section) != 0
2821 && bfd_section_lma (abfd, bfd_section)
2822 != bfd_section_vma (abfd, bfd_section))
2829 /* Function: overlay_invalidate_all (void)
2830 Invalidate the mapped state of all overlay sections (mark it as stale). */
2833 overlay_invalidate_all (void)
2835 struct objfile *objfile;
2836 struct obj_section *sect;
2838 ALL_OBJSECTIONS (objfile, sect)
2839 if (section_is_overlay (sect))
2840 sect->ovly_mapped = -1;
2843 /* Function: section_is_mapped (SECTION)
2844 Returns true if section is an overlay, and is currently mapped.
2846 Access to the ovly_mapped flag is restricted to this function, so
2847 that we can do automatic update. If the global flag
2848 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2849 overlay_invalidate_all. If the mapped state of the particular
2850 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2853 section_is_mapped (struct obj_section *osect)
2855 struct gdbarch *gdbarch;
2857 if (osect == 0 || !section_is_overlay (osect))
2860 switch (overlay_debugging)
2864 return 0; /* overlay debugging off */
2865 case ovly_auto: /* overlay debugging automatic */
2866 /* Unles there is a gdbarch_overlay_update function,
2867 there's really nothing useful to do here (can't really go auto) */
2868 gdbarch = get_objfile_arch (osect->objfile);
2869 if (gdbarch_overlay_update_p (gdbarch))
2871 if (overlay_cache_invalid)
2873 overlay_invalidate_all ();
2874 overlay_cache_invalid = 0;
2876 if (osect->ovly_mapped == -1)
2877 gdbarch_overlay_update (gdbarch, osect);
2879 /* fall thru to manual case */
2880 case ovly_on: /* overlay debugging manual */
2881 return osect->ovly_mapped == 1;
2885 /* Function: pc_in_unmapped_range
2886 If PC falls into the lma range of SECTION, return true, else false. */
2889 pc_in_unmapped_range (CORE_ADDR pc, struct obj_section *section)
2891 if (section_is_overlay (section))
2893 bfd *abfd = section->objfile->obfd;
2894 asection *bfd_section = section->the_bfd_section;
2896 /* We assume the LMA is relocated by the same offset as the VMA. */
2897 bfd_vma size = bfd_get_section_size (bfd_section);
2898 CORE_ADDR offset = obj_section_offset (section);
2900 if (bfd_get_section_lma (abfd, bfd_section) + offset <= pc
2901 && pc < bfd_get_section_lma (abfd, bfd_section) + offset + size)
2908 /* Function: pc_in_mapped_range
2909 If PC falls into the vma range of SECTION, return true, else false. */
2912 pc_in_mapped_range (CORE_ADDR pc, struct obj_section *section)
2914 if (section_is_overlay (section))
2916 if (obj_section_addr (section) <= pc
2917 && pc < obj_section_endaddr (section))
2925 /* Return true if the mapped ranges of sections A and B overlap, false
2928 sections_overlap (struct obj_section *a, struct obj_section *b)
2930 CORE_ADDR a_start = obj_section_addr (a);
2931 CORE_ADDR a_end = obj_section_endaddr (a);
2932 CORE_ADDR b_start = obj_section_addr (b);
2933 CORE_ADDR b_end = obj_section_endaddr (b);
2935 return (a_start < b_end && b_start < a_end);
2938 /* Function: overlay_unmapped_address (PC, SECTION)
2939 Returns the address corresponding to PC in the unmapped (load) range.
2940 May be the same as PC. */
2943 overlay_unmapped_address (CORE_ADDR pc, struct obj_section *section)
2945 if (section_is_overlay (section) && pc_in_mapped_range (pc, section))
2947 bfd *abfd = section->objfile->obfd;
2948 asection *bfd_section = section->the_bfd_section;
2950 return pc + bfd_section_lma (abfd, bfd_section)
2951 - bfd_section_vma (abfd, bfd_section);
2957 /* Function: overlay_mapped_address (PC, SECTION)
2958 Returns the address corresponding to PC in the mapped (runtime) range.
2959 May be the same as PC. */
2962 overlay_mapped_address (CORE_ADDR pc, struct obj_section *section)
2964 if (section_is_overlay (section) && pc_in_unmapped_range (pc, section))
2966 bfd *abfd = section->objfile->obfd;
2967 asection *bfd_section = section->the_bfd_section;
2969 return pc + bfd_section_vma (abfd, bfd_section)
2970 - bfd_section_lma (abfd, bfd_section);
2977 /* Function: symbol_overlayed_address
2978 Return one of two addresses (relative to the VMA or to the LMA),
2979 depending on whether the section is mapped or not. */
2982 symbol_overlayed_address (CORE_ADDR address, struct obj_section *section)
2984 if (overlay_debugging)
2986 /* If the symbol has no section, just return its regular address. */
2989 /* If the symbol's section is not an overlay, just return its address */
2990 if (!section_is_overlay (section))
2992 /* If the symbol's section is mapped, just return its address */
2993 if (section_is_mapped (section))
2996 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
2997 * then return its LOADED address rather than its vma address!!
2999 return overlay_unmapped_address (address, section);
3004 /* Function: find_pc_overlay (PC)
3005 Return the best-match overlay section for PC:
3006 If PC matches a mapped overlay section's VMA, return that section.
3007 Else if PC matches an unmapped section's VMA, return that section.
3008 Else if PC matches an unmapped section's LMA, return that section. */
3010 struct obj_section *
3011 find_pc_overlay (CORE_ADDR pc)
3013 struct objfile *objfile;
3014 struct obj_section *osect, *best_match = NULL;
3016 if (overlay_debugging)
3017 ALL_OBJSECTIONS (objfile, osect)
3018 if (section_is_overlay (osect))
3020 if (pc_in_mapped_range (pc, osect))
3022 if (section_is_mapped (osect))
3027 else if (pc_in_unmapped_range (pc, osect))
3033 /* Function: find_pc_mapped_section (PC)
3034 If PC falls into the VMA address range of an overlay section that is
3035 currently marked as MAPPED, return that section. Else return NULL. */
3037 struct obj_section *
3038 find_pc_mapped_section (CORE_ADDR pc)
3040 struct objfile *objfile;
3041 struct obj_section *osect;
3043 if (overlay_debugging)
3044 ALL_OBJSECTIONS (objfile, osect)
3045 if (pc_in_mapped_range (pc, osect) && section_is_mapped (osect))
3051 /* Function: list_overlays_command
3052 Print a list of mapped sections and their PC ranges */
3055 list_overlays_command (char *args, int from_tty)
3058 struct objfile *objfile;
3059 struct obj_section *osect;
3061 if (overlay_debugging)
3062 ALL_OBJSECTIONS (objfile, osect)
3063 if (section_is_mapped (osect))
3065 struct gdbarch *gdbarch = get_objfile_arch (objfile);
3070 vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section);
3071 lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section);
3072 size = bfd_get_section_size (osect->the_bfd_section);
3073 name = bfd_section_name (objfile->obfd, osect->the_bfd_section);
3075 printf_filtered ("Section %s, loaded at ", name);
3076 fputs_filtered (paddress (gdbarch, lma), gdb_stdout);
3077 puts_filtered (" - ");
3078 fputs_filtered (paddress (gdbarch, lma + size), gdb_stdout);
3079 printf_filtered (", mapped at ");
3080 fputs_filtered (paddress (gdbarch, vma), gdb_stdout);
3081 puts_filtered (" - ");
3082 fputs_filtered (paddress (gdbarch, vma + size), gdb_stdout);
3083 puts_filtered ("\n");
3088 printf_filtered (_("No sections are mapped.\n"));
3091 /* Function: map_overlay_command
3092 Mark the named section as mapped (ie. residing at its VMA address). */
3095 map_overlay_command (char *args, int from_tty)
3097 struct objfile *objfile, *objfile2;
3098 struct obj_section *sec, *sec2;
3100 if (!overlay_debugging)
3102 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3103 the 'overlay manual' command."));
3105 if (args == 0 || *args == 0)
3106 error (_("Argument required: name of an overlay section"));
3108 /* First, find a section matching the user supplied argument */
3109 ALL_OBJSECTIONS (objfile, sec)
3110 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
3112 /* Now, check to see if the section is an overlay. */
3113 if (!section_is_overlay (sec))
3114 continue; /* not an overlay section */
3116 /* Mark the overlay as "mapped" */
3117 sec->ovly_mapped = 1;
3119 /* Next, make a pass and unmap any sections that are
3120 overlapped by this new section: */
3121 ALL_OBJSECTIONS (objfile2, sec2)
3122 if (sec2->ovly_mapped && sec != sec2 && sections_overlap (sec, sec2))
3125 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3126 bfd_section_name (objfile->obfd,
3127 sec2->the_bfd_section));
3128 sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2 */
3132 error (_("No overlay section called %s"), args);
3135 /* Function: unmap_overlay_command
3136 Mark the overlay section as unmapped
3137 (ie. resident in its LMA address range, rather than the VMA range). */
3140 unmap_overlay_command (char *args, int from_tty)
3142 struct objfile *objfile;
3143 struct obj_section *sec;
3145 if (!overlay_debugging)
3147 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3148 the 'overlay manual' command."));
3150 if (args == 0 || *args == 0)
3151 error (_("Argument required: name of an overlay section"));
3153 /* First, find a section matching the user supplied argument */
3154 ALL_OBJSECTIONS (objfile, sec)
3155 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
3157 if (!sec->ovly_mapped)
3158 error (_("Section %s is not mapped"), args);
3159 sec->ovly_mapped = 0;
3162 error (_("No overlay section called %s"), args);
3165 /* Function: overlay_auto_command
3166 A utility command to turn on overlay debugging.
3167 Possibly this should be done via a set/show command. */
3170 overlay_auto_command (char *args, int from_tty)
3172 overlay_debugging = ovly_auto;
3173 enable_overlay_breakpoints ();
3175 printf_unfiltered (_("Automatic overlay debugging enabled."));
3178 /* Function: overlay_manual_command
3179 A utility command to turn on overlay debugging.
3180 Possibly this should be done via a set/show command. */
3183 overlay_manual_command (char *args, int from_tty)
3185 overlay_debugging = ovly_on;
3186 disable_overlay_breakpoints ();
3188 printf_unfiltered (_("Overlay debugging enabled."));
3191 /* Function: overlay_off_command
3192 A utility command to turn on overlay debugging.
3193 Possibly this should be done via a set/show command. */
3196 overlay_off_command (char *args, int from_tty)
3198 overlay_debugging = ovly_off;
3199 disable_overlay_breakpoints ();
3201 printf_unfiltered (_("Overlay debugging disabled."));
3205 overlay_load_command (char *args, int from_tty)
3207 struct gdbarch *gdbarch = get_current_arch ();
3209 if (gdbarch_overlay_update_p (gdbarch))
3210 gdbarch_overlay_update (gdbarch, NULL);
3212 error (_("This target does not know how to read its overlay state."));
3215 /* Function: overlay_command
3216 A place-holder for a mis-typed command */
3218 /* Command list chain containing all defined "overlay" subcommands. */
3219 struct cmd_list_element *overlaylist;
3222 overlay_command (char *args, int from_tty)
3225 ("\"overlay\" must be followed by the name of an overlay command.\n");
3226 help_list (overlaylist, "overlay ", -1, gdb_stdout);
3230 /* Target Overlays for the "Simplest" overlay manager:
3232 This is GDB's default target overlay layer. It works with the
3233 minimal overlay manager supplied as an example by Cygnus. The
3234 entry point is via a function pointer "gdbarch_overlay_update",
3235 so targets that use a different runtime overlay manager can
3236 substitute their own overlay_update function and take over the
3239 The overlay_update function pokes around in the target's data structures
3240 to see what overlays are mapped, and updates GDB's overlay mapping with
3243 In this simple implementation, the target data structures are as follows:
3244 unsigned _novlys; /# number of overlay sections #/
3245 unsigned _ovly_table[_novlys][4] = {
3246 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3247 {..., ..., ..., ...},
3249 unsigned _novly_regions; /# number of overlay regions #/
3250 unsigned _ovly_region_table[_novly_regions][3] = {
3251 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3254 These functions will attempt to update GDB's mappedness state in the
3255 symbol section table, based on the target's mappedness state.
3257 To do this, we keep a cached copy of the target's _ovly_table, and
3258 attempt to detect when the cached copy is invalidated. The main
3259 entry point is "simple_overlay_update(SECT), which looks up SECT in
3260 the cached table and re-reads only the entry for that section from
3261 the target (whenever possible).
3264 /* Cached, dynamically allocated copies of the target data structures: */
3265 static unsigned (*cache_ovly_table)[4] = 0;
3267 static unsigned (*cache_ovly_region_table)[3] = 0;
3269 static unsigned cache_novlys = 0;
3271 static unsigned cache_novly_regions = 0;
3273 static CORE_ADDR cache_ovly_table_base = 0;
3275 static CORE_ADDR cache_ovly_region_table_base = 0;
3279 VMA, SIZE, LMA, MAPPED
3282 /* Throw away the cached copy of _ovly_table */
3284 simple_free_overlay_table (void)
3286 if (cache_ovly_table)
3287 xfree (cache_ovly_table);
3289 cache_ovly_table = NULL;
3290 cache_ovly_table_base = 0;
3294 /* Throw away the cached copy of _ovly_region_table */
3296 simple_free_overlay_region_table (void)
3298 if (cache_ovly_region_table)
3299 xfree (cache_ovly_region_table);
3300 cache_novly_regions = 0;
3301 cache_ovly_region_table = NULL;
3302 cache_ovly_region_table_base = 0;
3306 /* Read an array of ints of size SIZE from the target into a local buffer.
3307 Convert to host order. int LEN is number of ints */
3309 read_target_long_array (CORE_ADDR memaddr, unsigned int *myaddr,
3310 int len, int size, enum bfd_endian byte_order)
3312 /* FIXME (alloca): Not safe if array is very large. */
3313 gdb_byte *buf = alloca (len * size);
3316 read_memory (memaddr, buf, len * size);
3317 for (i = 0; i < len; i++)
3318 myaddr[i] = extract_unsigned_integer (size * i + buf, size, byte_order);
3321 /* Find and grab a copy of the target _ovly_table
3322 (and _novlys, which is needed for the table's size) */
3324 simple_read_overlay_table (void)
3326 struct minimal_symbol *novlys_msym, *ovly_table_msym;
3327 struct gdbarch *gdbarch;
3329 enum bfd_endian byte_order;
3331 simple_free_overlay_table ();
3332 novlys_msym = lookup_minimal_symbol ("_novlys", NULL, NULL);
3335 error (_("Error reading inferior's overlay table: "
3336 "couldn't find `_novlys' variable\n"
3337 "in inferior. Use `overlay manual' mode."));
3341 ovly_table_msym = lookup_minimal_symbol ("_ovly_table", NULL, NULL);
3342 if (! ovly_table_msym)
3344 error (_("Error reading inferior's overlay table: couldn't find "
3345 "`_ovly_table' array\n"
3346 "in inferior. Use `overlay manual' mode."));
3350 gdbarch = get_objfile_arch (msymbol_objfile (ovly_table_msym));
3351 word_size = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT;
3352 byte_order = gdbarch_byte_order (gdbarch);
3354 cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym),
3357 = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table));
3358 cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (ovly_table_msym);
3359 read_target_long_array (cache_ovly_table_base,
3360 (unsigned int *) cache_ovly_table,
3361 cache_novlys * 4, word_size, byte_order);
3363 return 1; /* SUCCESS */
3367 /* Find and grab a copy of the target _ovly_region_table
3368 (and _novly_regions, which is needed for the table's size) */
3370 simple_read_overlay_region_table (void)
3372 struct minimal_symbol *msym;
3373 struct gdbarch *gdbarch;
3375 enum bfd_endian byte_order;
3377 simple_free_overlay_region_table ();
3378 msym = lookup_minimal_symbol ("_novly_regions", NULL, NULL);
3380 return 0; /* failure */
3382 gdbarch = get_objfile_arch (msymbol_objfile (msym));
3383 word_size = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT;
3384 byte_order = gdbarch_byte_order (gdbarch);
3386 cache_novly_regions = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym),
3389 cache_ovly_region_table = (void *) xmalloc (cache_novly_regions * 12);
3390 if (cache_ovly_region_table != NULL)
3392 msym = lookup_minimal_symbol ("_ovly_region_table", NULL, NULL);
3395 cache_ovly_region_table_base = SYMBOL_VALUE_ADDRESS (msym);
3396 read_target_long_array (cache_ovly_region_table_base,
3397 (unsigned int *) cache_ovly_region_table,
3398 cache_novly_regions * 3,
3399 word_size, byte_order);
3402 return 0; /* failure */
3405 return 0; /* failure */
3406 return 1; /* SUCCESS */
3410 /* Function: simple_overlay_update_1
3411 A helper function for simple_overlay_update. Assuming a cached copy
3412 of _ovly_table exists, look through it to find an entry whose vma,
3413 lma and size match those of OSECT. Re-read the entry and make sure
3414 it still matches OSECT (else the table may no longer be valid).
3415 Set OSECT's mapped state to match the entry. Return: 1 for
3416 success, 0 for failure. */
3419 simple_overlay_update_1 (struct obj_section *osect)
3422 bfd *obfd = osect->objfile->obfd;
3423 asection *bsect = osect->the_bfd_section;
3424 struct gdbarch *gdbarch = get_objfile_arch (osect->objfile);
3425 int word_size = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT;
3426 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3428 size = bfd_get_section_size (osect->the_bfd_section);
3429 for (i = 0; i < cache_novlys; i++)
3430 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3431 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3432 /* && cache_ovly_table[i][SIZE] == size */ )
3434 read_target_long_array (cache_ovly_table_base + i * word_size,
3435 (unsigned int *) cache_ovly_table[i],
3436 4, word_size, byte_order);
3437 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3438 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3439 /* && cache_ovly_table[i][SIZE] == size */ )
3441 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3444 else /* Warning! Warning! Target's ovly table has changed! */
3450 /* Function: simple_overlay_update
3451 If OSECT is NULL, then update all sections' mapped state
3452 (after re-reading the entire target _ovly_table).
3453 If OSECT is non-NULL, then try to find a matching entry in the
3454 cached ovly_table and update only OSECT's mapped state.
3455 If a cached entry can't be found or the cache isn't valid, then
3456 re-read the entire cache, and go ahead and update all sections. */
3459 simple_overlay_update (struct obj_section *osect)
3461 struct objfile *objfile;
3463 /* Were we given an osect to look up? NULL means do all of them. */
3465 /* Have we got a cached copy of the target's overlay table? */
3466 if (cache_ovly_table != NULL)
3467 /* Does its cached location match what's currently in the symtab? */
3468 if (cache_ovly_table_base ==
3469 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL, NULL)))
3470 /* Then go ahead and try to look up this single section in the cache */
3471 if (simple_overlay_update_1 (osect))
3472 /* Found it! We're done. */
3475 /* Cached table no good: need to read the entire table anew.
3476 Or else we want all the sections, in which case it's actually
3477 more efficient to read the whole table in one block anyway. */
3479 if (! simple_read_overlay_table ())
3482 /* Now may as well update all sections, even if only one was requested. */
3483 ALL_OBJSECTIONS (objfile, osect)
3484 if (section_is_overlay (osect))
3487 bfd *obfd = osect->objfile->obfd;
3488 asection *bsect = osect->the_bfd_section;
3490 size = bfd_get_section_size (bsect);
3491 for (i = 0; i < cache_novlys; i++)
3492 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3493 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3494 /* && cache_ovly_table[i][SIZE] == size */ )
3495 { /* obj_section matches i'th entry in ovly_table */
3496 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3497 break; /* finished with inner for loop: break out */
3502 /* Set the output sections and output offsets for section SECTP in
3503 ABFD. The relocation code in BFD will read these offsets, so we
3504 need to be sure they're initialized. We map each section to itself,
3505 with no offset; this means that SECTP->vma will be honored. */
3508 symfile_dummy_outputs (bfd *abfd, asection *sectp, void *dummy)
3510 sectp->output_section = sectp;
3511 sectp->output_offset = 0;
3514 /* Default implementation for sym_relocate. */
3518 default_symfile_relocate (struct objfile *objfile, asection *sectp,
3521 bfd *abfd = objfile->obfd;
3523 /* We're only interested in sections with relocation
3525 if ((sectp->flags & SEC_RELOC) == 0)
3528 /* We will handle section offsets properly elsewhere, so relocate as if
3529 all sections begin at 0. */
3530 bfd_map_over_sections (abfd, symfile_dummy_outputs, NULL);
3532 return bfd_simple_get_relocated_section_contents (abfd, sectp, buf, NULL);
3535 /* Relocate the contents of a debug section SECTP in ABFD. The
3536 contents are stored in BUF if it is non-NULL, or returned in a
3537 malloc'd buffer otherwise.
3539 For some platforms and debug info formats, shared libraries contain
3540 relocations against the debug sections (particularly for DWARF-2;
3541 one affected platform is PowerPC GNU/Linux, although it depends on
3542 the version of the linker in use). Also, ELF object files naturally
3543 have unresolved relocations for their debug sections. We need to apply
3544 the relocations in order to get the locations of symbols correct.
3545 Another example that may require relocation processing, is the
3546 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3550 symfile_relocate_debug_section (struct objfile *objfile,
3551 asection *sectp, bfd_byte *buf)
3553 gdb_assert (objfile->sf->sym_relocate);
3555 return (*objfile->sf->sym_relocate) (objfile, sectp, buf);
3558 struct symfile_segment_data *
3559 get_symfile_segment_data (bfd *abfd)
3561 struct sym_fns *sf = find_sym_fns (abfd);
3566 return sf->sym_segments (abfd);
3570 free_symfile_segment_data (struct symfile_segment_data *data)
3572 xfree (data->segment_bases);
3573 xfree (data->segment_sizes);
3574 xfree (data->segment_info);
3580 - DATA, containing segment addresses from the object file ABFD, and
3581 the mapping from ABFD's sections onto the segments that own them,
3583 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3584 segment addresses reported by the target,
3585 store the appropriate offsets for each section in OFFSETS.
3587 If there are fewer entries in SEGMENT_BASES than there are segments
3588 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3590 If there are more entries, then ignore the extra. The target may
3591 not be able to distinguish between an empty data segment and a
3592 missing data segment; a missing text segment is less plausible. */
3594 symfile_map_offsets_to_segments (bfd *abfd, struct symfile_segment_data *data,
3595 struct section_offsets *offsets,
3596 int num_segment_bases,
3597 const CORE_ADDR *segment_bases)
3602 /* It doesn't make sense to call this function unless you have some
3603 segment base addresses. */
3604 gdb_assert (num_segment_bases > 0);
3606 /* If we do not have segment mappings for the object file, we
3607 can not relocate it by segments. */
3608 gdb_assert (data != NULL);
3609 gdb_assert (data->num_segments > 0);
3611 for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next)
3613 int which = data->segment_info[i];
3615 gdb_assert (0 <= which && which <= data->num_segments);
3617 /* Don't bother computing offsets for sections that aren't
3618 loaded as part of any segment. */
3622 /* Use the last SEGMENT_BASES entry as the address of any extra
3623 segments mentioned in DATA->segment_info. */
3624 if (which > num_segment_bases)
3625 which = num_segment_bases;
3627 offsets->offsets[i] = (segment_bases[which - 1]
3628 - data->segment_bases[which - 1]);
3635 symfile_find_segment_sections (struct objfile *objfile)
3637 bfd *abfd = objfile->obfd;
3640 struct symfile_segment_data *data;
3642 data = get_symfile_segment_data (objfile->obfd);
3646 if (data->num_segments != 1 && data->num_segments != 2)
3648 free_symfile_segment_data (data);
3652 for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next)
3654 int which = data->segment_info[i];
3658 if (objfile->sect_index_text == -1)
3659 objfile->sect_index_text = sect->index;
3661 if (objfile->sect_index_rodata == -1)
3662 objfile->sect_index_rodata = sect->index;
3664 else if (which == 2)
3666 if (objfile->sect_index_data == -1)
3667 objfile->sect_index_data = sect->index;
3669 if (objfile->sect_index_bss == -1)
3670 objfile->sect_index_bss = sect->index;
3674 free_symfile_segment_data (data);
3678 _initialize_symfile (void)
3680 struct cmd_list_element *c;
3682 c = add_cmd ("symbol-file", class_files, symbol_file_command, _("\
3683 Load symbol table from executable file FILE.\n\
3684 The `file' command can also load symbol tables, as well as setting the file\n\
3685 to execute."), &cmdlist);
3686 set_cmd_completer (c, filename_completer);
3688 c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command, _("\
3689 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3690 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3691 ADDR is the starting address of the file's text.\n\
3692 The optional arguments are section-name section-address pairs and\n\
3693 should be specified if the data and bss segments are not contiguous\n\
3694 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3696 set_cmd_completer (c, filename_completer);
3698 c = add_cmd ("load", class_files, load_command, _("\
3699 Dynamically load FILE into the running program, and record its symbols\n\
3700 for access from GDB.\n\
3701 A load OFFSET may also be given."), &cmdlist);
3702 set_cmd_completer (c, filename_completer);
3704 add_setshow_boolean_cmd ("symbol-reloading", class_support,
3705 &symbol_reloading, _("\
3706 Set dynamic symbol table reloading multiple times in one run."), _("\
3707 Show dynamic symbol table reloading multiple times in one run."), NULL,
3709 show_symbol_reloading,
3710 &setlist, &showlist);
3712 add_prefix_cmd ("overlay", class_support, overlay_command,
3713 _("Commands for debugging overlays."), &overlaylist,
3714 "overlay ", 0, &cmdlist);
3716 add_com_alias ("ovly", "overlay", class_alias, 1);
3717 add_com_alias ("ov", "overlay", class_alias, 1);
3719 add_cmd ("map-overlay", class_support, map_overlay_command,
3720 _("Assert that an overlay section is mapped."), &overlaylist);
3722 add_cmd ("unmap-overlay", class_support, unmap_overlay_command,
3723 _("Assert that an overlay section is unmapped."), &overlaylist);
3725 add_cmd ("list-overlays", class_support, list_overlays_command,
3726 _("List mappings of overlay sections."), &overlaylist);
3728 add_cmd ("manual", class_support, overlay_manual_command,
3729 _("Enable overlay debugging."), &overlaylist);
3730 add_cmd ("off", class_support, overlay_off_command,
3731 _("Disable overlay debugging."), &overlaylist);
3732 add_cmd ("auto", class_support, overlay_auto_command,
3733 _("Enable automatic overlay debugging."), &overlaylist);
3734 add_cmd ("load-target", class_support, overlay_load_command,
3735 _("Read the overlay mapping state from the target."), &overlaylist);
3737 /* Filename extension to source language lookup table: */
3738 init_filename_language_table ();
3739 add_setshow_string_noescape_cmd ("extension-language", class_files,
3741 Set mapping between filename extension and source language."), _("\
3742 Show mapping between filename extension and source language."), _("\
3743 Usage: set extension-language .foo bar"),
3744 set_ext_lang_command,
3746 &setlist, &showlist);
3748 add_info ("extensions", info_ext_lang_command,
3749 _("All filename extensions associated with a source language."));
3751 add_setshow_optional_filename_cmd ("debug-file-directory", class_support,
3752 &debug_file_directory, _("\
3753 Set the directories where separate debug symbols are searched for."), _("\
3754 Show the directories where separate debug symbols are searched for."), _("\
3755 Separate debug symbols are first searched for in the same\n\
3756 directory as the binary, then in the `" DEBUG_SUBDIRECTORY "' subdirectory,\n\
3757 and lastly at the path of the directory of the binary with\n\
3758 each global debug-file-directory component prepended."),
3760 show_debug_file_directory,
3761 &setlist, &showlist);