1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright (C) 1990-2013 Free Software Foundation, Inc.
5 Contributed by Cygnus Support, using pieces from other GDB modules.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 #include "arch-utils.h"
35 #include "breakpoint.h"
37 #include "complaints.h"
41 #include "filenames.h" /* for DOSish file names */
42 #include "gdb-stabs.h"
43 #include "gdb_obstack.h"
44 #include "completer.h"
47 #include "readline/readline.h"
48 #include "gdb_assert.h"
52 #include "parser-defs.h"
59 #include "cli/cli-utils.h"
61 #include <sys/types.h>
63 #include "gdb_string.h"
71 int (*deprecated_ui_load_progress_hook) (const char *section,
73 void (*deprecated_show_load_progress) (const char *section,
74 unsigned long section_sent,
75 unsigned long section_size,
76 unsigned long total_sent,
77 unsigned long total_size);
78 void (*deprecated_pre_add_symbol_hook) (const char *);
79 void (*deprecated_post_add_symbol_hook) (void);
81 static void clear_symtab_users_cleanup (void *ignore);
83 /* Global variables owned by this file. */
84 int readnow_symbol_files; /* Read full symbols immediately. */
86 /* Functions this file defines. */
88 static void load_command (char *, int);
90 static void symbol_file_add_main_1 (char *args, int from_tty, int flags);
92 static void add_symbol_file_command (char *, int);
94 static const struct sym_fns *find_sym_fns (bfd *);
96 static void decrement_reading_symtab (void *);
98 static void overlay_invalidate_all (void);
100 static void overlay_auto_command (char *, int);
102 static void overlay_manual_command (char *, int);
104 static void overlay_off_command (char *, int);
106 static void overlay_load_command (char *, int);
108 static void overlay_command (char *, int);
110 static void simple_free_overlay_table (void);
112 static void read_target_long_array (CORE_ADDR, unsigned int *, int, int,
115 static int simple_read_overlay_table (void);
117 static int simple_overlay_update_1 (struct obj_section *);
119 static void add_filename_language (char *ext, enum language lang);
121 static void info_ext_lang_command (char *args, int from_tty);
123 static void init_filename_language_table (void);
125 static void symfile_find_segment_sections (struct objfile *objfile);
127 void _initialize_symfile (void);
129 /* List of all available sym_fns. On gdb startup, each object file reader
130 calls add_symtab_fns() to register information on each format it is
133 typedef const struct sym_fns *sym_fns_ptr;
134 DEF_VEC_P (sym_fns_ptr);
136 static VEC (sym_fns_ptr) *symtab_fns = NULL;
138 /* If non-zero, shared library symbols will be added automatically
139 when the inferior is created, new libraries are loaded, or when
140 attaching to the inferior. This is almost always what users will
141 want to have happen; but for very large programs, the startup time
142 will be excessive, and so if this is a problem, the user can clear
143 this flag and then add the shared library symbols as needed. Note
144 that there is a potential for confusion, since if the shared
145 library symbols are not loaded, commands like "info fun" will *not*
146 report all the functions that are actually present. */
148 int auto_solib_add = 1;
151 /* True if we are reading a symbol table. */
153 int currently_reading_symtab = 0;
156 decrement_reading_symtab (void *dummy)
158 currently_reading_symtab--;
159 gdb_assert (currently_reading_symtab >= 0);
162 /* Increment currently_reading_symtab and return a cleanup that can be
163 used to decrement it. */
166 increment_reading_symtab (void)
168 ++currently_reading_symtab;
169 gdb_assert (currently_reading_symtab > 0);
170 return make_cleanup (decrement_reading_symtab, NULL);
173 /* Remember the lowest-addressed loadable section we've seen.
174 This function is called via bfd_map_over_sections.
176 In case of equal vmas, the section with the largest size becomes the
177 lowest-addressed loadable section.
179 If the vmas and sizes are equal, the last section is considered the
180 lowest-addressed loadable section. */
183 find_lowest_section (bfd *abfd, asection *sect, void *obj)
185 asection **lowest = (asection **) obj;
187 if (0 == (bfd_get_section_flags (abfd, sect) & (SEC_ALLOC | SEC_LOAD)))
190 *lowest = sect; /* First loadable section */
191 else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect))
192 *lowest = sect; /* A lower loadable section */
193 else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect)
194 && (bfd_section_size (abfd, (*lowest))
195 <= bfd_section_size (abfd, sect)))
199 /* Create a new section_addr_info, with room for NUM_SECTIONS. The
200 new object's 'num_sections' field is set to 0; it must be updated
203 struct section_addr_info *
204 alloc_section_addr_info (size_t num_sections)
206 struct section_addr_info *sap;
209 size = (sizeof (struct section_addr_info)
210 + sizeof (struct other_sections) * (num_sections - 1));
211 sap = (struct section_addr_info *) xmalloc (size);
212 memset (sap, 0, size);
217 /* Build (allocate and populate) a section_addr_info struct from
218 an existing section table. */
220 extern struct section_addr_info *
221 build_section_addr_info_from_section_table (const struct target_section *start,
222 const struct target_section *end)
224 struct section_addr_info *sap;
225 const struct target_section *stp;
228 sap = alloc_section_addr_info (end - start);
230 for (stp = start, oidx = 0; stp != end; stp++)
232 struct bfd_section *asect = stp->the_bfd_section;
233 bfd *abfd = asect->owner;
235 if (bfd_get_section_flags (abfd, asect) & (SEC_ALLOC | SEC_LOAD)
236 && oidx < end - start)
238 sap->other[oidx].addr = stp->addr;
239 sap->other[oidx].name = xstrdup (bfd_section_name (abfd, asect));
240 sap->other[oidx].sectindex = gdb_bfd_section_index (abfd, asect);
245 sap->num_sections = oidx;
250 /* Create a section_addr_info from section offsets in ABFD. */
252 static struct section_addr_info *
253 build_section_addr_info_from_bfd (bfd *abfd)
255 struct section_addr_info *sap;
257 struct bfd_section *sec;
259 sap = alloc_section_addr_info (bfd_count_sections (abfd));
260 for (i = 0, sec = abfd->sections; sec != NULL; sec = sec->next)
261 if (bfd_get_section_flags (abfd, sec) & (SEC_ALLOC | SEC_LOAD))
263 sap->other[i].addr = bfd_get_section_vma (abfd, sec);
264 sap->other[i].name = xstrdup (bfd_get_section_name (abfd, sec));
265 sap->other[i].sectindex = gdb_bfd_section_index (abfd, sec);
269 sap->num_sections = i;
274 /* Create a section_addr_info from section offsets in OBJFILE. */
276 struct section_addr_info *
277 build_section_addr_info_from_objfile (const struct objfile *objfile)
279 struct section_addr_info *sap;
282 /* Before reread_symbols gets rewritten it is not safe to call:
283 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
285 sap = build_section_addr_info_from_bfd (objfile->obfd);
286 for (i = 0; i < sap->num_sections; i++)
288 int sectindex = sap->other[i].sectindex;
290 sap->other[i].addr += objfile->section_offsets->offsets[sectindex];
295 /* Free all memory allocated by build_section_addr_info_from_section_table. */
298 free_section_addr_info (struct section_addr_info *sap)
302 for (idx = 0; idx < sap->num_sections; idx++)
303 xfree (sap->other[idx].name);
307 /* Initialize OBJFILE's sect_index_* members. */
310 init_objfile_sect_indices (struct objfile *objfile)
315 sect = bfd_get_section_by_name (objfile->obfd, ".text");
317 objfile->sect_index_text = sect->index;
319 sect = bfd_get_section_by_name (objfile->obfd, ".data");
321 objfile->sect_index_data = sect->index;
323 sect = bfd_get_section_by_name (objfile->obfd, ".bss");
325 objfile->sect_index_bss = sect->index;
327 sect = bfd_get_section_by_name (objfile->obfd, ".rodata");
329 objfile->sect_index_rodata = sect->index;
331 /* This is where things get really weird... We MUST have valid
332 indices for the various sect_index_* members or gdb will abort.
333 So if for example, there is no ".text" section, we have to
334 accomodate that. First, check for a file with the standard
335 one or two segments. */
337 symfile_find_segment_sections (objfile);
339 /* Except when explicitly adding symbol files at some address,
340 section_offsets contains nothing but zeros, so it doesn't matter
341 which slot in section_offsets the individual sect_index_* members
342 index into. So if they are all zero, it is safe to just point
343 all the currently uninitialized indices to the first slot. But
344 beware: if this is the main executable, it may be relocated
345 later, e.g. by the remote qOffsets packet, and then this will
346 be wrong! That's why we try segments first. */
348 for (i = 0; i < objfile->num_sections; i++)
350 if (ANOFFSET (objfile->section_offsets, i) != 0)
355 if (i == objfile->num_sections)
357 if (objfile->sect_index_text == -1)
358 objfile->sect_index_text = 0;
359 if (objfile->sect_index_data == -1)
360 objfile->sect_index_data = 0;
361 if (objfile->sect_index_bss == -1)
362 objfile->sect_index_bss = 0;
363 if (objfile->sect_index_rodata == -1)
364 objfile->sect_index_rodata = 0;
368 /* The arguments to place_section. */
370 struct place_section_arg
372 struct section_offsets *offsets;
376 /* Find a unique offset to use for loadable section SECT if
377 the user did not provide an offset. */
380 place_section (bfd *abfd, asection *sect, void *obj)
382 struct place_section_arg *arg = obj;
383 CORE_ADDR *offsets = arg->offsets->offsets, start_addr;
385 ULONGEST align = ((ULONGEST) 1) << bfd_get_section_alignment (abfd, sect);
387 /* We are only interested in allocated sections. */
388 if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0)
391 /* If the user specified an offset, honor it. */
392 if (offsets[gdb_bfd_section_index (abfd, sect)] != 0)
395 /* Otherwise, let's try to find a place for the section. */
396 start_addr = (arg->lowest + align - 1) & -align;
403 for (cur_sec = abfd->sections; cur_sec != NULL; cur_sec = cur_sec->next)
405 int indx = cur_sec->index;
407 /* We don't need to compare against ourself. */
411 /* We can only conflict with allocated sections. */
412 if ((bfd_get_section_flags (abfd, cur_sec) & SEC_ALLOC) == 0)
415 /* If the section offset is 0, either the section has not been placed
416 yet, or it was the lowest section placed (in which case LOWEST
417 will be past its end). */
418 if (offsets[indx] == 0)
421 /* If this section would overlap us, then we must move up. */
422 if (start_addr + bfd_get_section_size (sect) > offsets[indx]
423 && start_addr < offsets[indx] + bfd_get_section_size (cur_sec))
425 start_addr = offsets[indx] + bfd_get_section_size (cur_sec);
426 start_addr = (start_addr + align - 1) & -align;
431 /* Otherwise, we appear to be OK. So far. */
436 offsets[gdb_bfd_section_index (abfd, sect)] = start_addr;
437 arg->lowest = start_addr + bfd_get_section_size (sect);
440 /* Store struct section_addr_info as prepared (made relative and with SECTINDEX
441 filled-in) by addr_info_make_relative into SECTION_OFFSETS of NUM_SECTIONS
445 relative_addr_info_to_section_offsets (struct section_offsets *section_offsets,
447 const struct section_addr_info *addrs)
451 memset (section_offsets, 0, SIZEOF_N_SECTION_OFFSETS (num_sections));
453 /* Now calculate offsets for section that were specified by the caller. */
454 for (i = 0; i < addrs->num_sections; i++)
456 const struct other_sections *osp;
458 osp = &addrs->other[i];
459 if (osp->sectindex == -1)
462 /* Record all sections in offsets. */
463 /* The section_offsets in the objfile are here filled in using
465 section_offsets->offsets[osp->sectindex] = osp->addr;
469 /* Transform section name S for a name comparison. prelink can split section
470 `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly
471 prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address
472 of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss'
473 (`.sbss') section has invalid (increased) virtual address. */
476 addr_section_name (const char *s)
478 if (strcmp (s, ".dynbss") == 0)
480 if (strcmp (s, ".sdynbss") == 0)
486 /* qsort comparator for addrs_section_sort. Sort entries in ascending order by
487 their (name, sectindex) pair. sectindex makes the sort by name stable. */
490 addrs_section_compar (const void *ap, const void *bp)
492 const struct other_sections *a = *((struct other_sections **) ap);
493 const struct other_sections *b = *((struct other_sections **) bp);
496 retval = strcmp (addr_section_name (a->name), addr_section_name (b->name));
500 return a->sectindex - b->sectindex;
503 /* Provide sorted array of pointers to sections of ADDRS. The array is
504 terminated by NULL. Caller is responsible to call xfree for it. */
506 static struct other_sections **
507 addrs_section_sort (struct section_addr_info *addrs)
509 struct other_sections **array;
512 /* `+ 1' for the NULL terminator. */
513 array = xmalloc (sizeof (*array) * (addrs->num_sections + 1));
514 for (i = 0; i < addrs->num_sections; i++)
515 array[i] = &addrs->other[i];
518 qsort (array, i, sizeof (*array), addrs_section_compar);
523 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
524 also SECTINDEXes specific to ABFD there. This function can be used to
525 rebase ADDRS to start referencing different BFD than before. */
528 addr_info_make_relative (struct section_addr_info *addrs, bfd *abfd)
530 asection *lower_sect;
531 CORE_ADDR lower_offset;
533 struct cleanup *my_cleanup;
534 struct section_addr_info *abfd_addrs;
535 struct other_sections **addrs_sorted, **abfd_addrs_sorted;
536 struct other_sections **addrs_to_abfd_addrs;
538 /* Find lowest loadable section to be used as starting point for
539 continguous sections. */
541 bfd_map_over_sections (abfd, find_lowest_section, &lower_sect);
542 if (lower_sect == NULL)
544 warning (_("no loadable sections found in added symbol-file %s"),
545 bfd_get_filename (abfd));
549 lower_offset = bfd_section_vma (bfd_get_filename (abfd), lower_sect);
551 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
552 in ABFD. Section names are not unique - there can be multiple sections of
553 the same name. Also the sections of the same name do not have to be
554 adjacent to each other. Some sections may be present only in one of the
555 files. Even sections present in both files do not have to be in the same
558 Use stable sort by name for the sections in both files. Then linearly
559 scan both lists matching as most of the entries as possible. */
561 addrs_sorted = addrs_section_sort (addrs);
562 my_cleanup = make_cleanup (xfree, addrs_sorted);
564 abfd_addrs = build_section_addr_info_from_bfd (abfd);
565 make_cleanup_free_section_addr_info (abfd_addrs);
566 abfd_addrs_sorted = addrs_section_sort (abfd_addrs);
567 make_cleanup (xfree, abfd_addrs_sorted);
569 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and
570 ABFD_ADDRS_SORTED. */
572 addrs_to_abfd_addrs = xzalloc (sizeof (*addrs_to_abfd_addrs)
573 * addrs->num_sections);
574 make_cleanup (xfree, addrs_to_abfd_addrs);
576 while (*addrs_sorted)
578 const char *sect_name = addr_section_name ((*addrs_sorted)->name);
580 while (*abfd_addrs_sorted
581 && strcmp (addr_section_name ((*abfd_addrs_sorted)->name),
585 if (*abfd_addrs_sorted
586 && strcmp (addr_section_name ((*abfd_addrs_sorted)->name),
591 /* Make the found item directly addressable from ADDRS. */
592 index_in_addrs = *addrs_sorted - addrs->other;
593 gdb_assert (addrs_to_abfd_addrs[index_in_addrs] == NULL);
594 addrs_to_abfd_addrs[index_in_addrs] = *abfd_addrs_sorted;
596 /* Never use the same ABFD entry twice. */
603 /* Calculate offsets for the loadable sections.
604 FIXME! Sections must be in order of increasing loadable section
605 so that contiguous sections can use the lower-offset!!!
607 Adjust offsets if the segments are not contiguous.
608 If the section is contiguous, its offset should be set to
609 the offset of the highest loadable section lower than it
610 (the loadable section directly below it in memory).
611 this_offset = lower_offset = lower_addr - lower_orig_addr */
613 for (i = 0; i < addrs->num_sections; i++)
615 struct other_sections *sect = addrs_to_abfd_addrs[i];
619 /* This is the index used by BFD. */
620 addrs->other[i].sectindex = sect->sectindex;
622 if (addrs->other[i].addr != 0)
624 addrs->other[i].addr -= sect->addr;
625 lower_offset = addrs->other[i].addr;
628 addrs->other[i].addr = lower_offset;
632 /* addr_section_name transformation is not used for SECT_NAME. */
633 const char *sect_name = addrs->other[i].name;
635 /* This section does not exist in ABFD, which is normally
636 unexpected and we want to issue a warning.
638 However, the ELF prelinker does create a few sections which are
639 marked in the main executable as loadable (they are loaded in
640 memory from the DYNAMIC segment) and yet are not present in
641 separate debug info files. This is fine, and should not cause
642 a warning. Shared libraries contain just the section
643 ".gnu.liblist" but it is not marked as loadable there. There is
644 no other way to identify them than by their name as the sections
645 created by prelink have no special flags.
647 For the sections `.bss' and `.sbss' see addr_section_name. */
649 if (!(strcmp (sect_name, ".gnu.liblist") == 0
650 || strcmp (sect_name, ".gnu.conflict") == 0
651 || (strcmp (sect_name, ".bss") == 0
653 && strcmp (addrs->other[i - 1].name, ".dynbss") == 0
654 && addrs_to_abfd_addrs[i - 1] != NULL)
655 || (strcmp (sect_name, ".sbss") == 0
657 && strcmp (addrs->other[i - 1].name, ".sdynbss") == 0
658 && addrs_to_abfd_addrs[i - 1] != NULL)))
659 warning (_("section %s not found in %s"), sect_name,
660 bfd_get_filename (abfd));
662 addrs->other[i].addr = 0;
663 addrs->other[i].sectindex = -1;
667 do_cleanups (my_cleanup);
670 /* Parse the user's idea of an offset for dynamic linking, into our idea
671 of how to represent it for fast symbol reading. This is the default
672 version of the sym_fns.sym_offsets function for symbol readers that
673 don't need to do anything special. It allocates a section_offsets table
674 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
677 default_symfile_offsets (struct objfile *objfile,
678 const struct section_addr_info *addrs)
680 objfile->num_sections = gdb_bfd_count_sections (objfile->obfd);
681 objfile->section_offsets = (struct section_offsets *)
682 obstack_alloc (&objfile->objfile_obstack,
683 SIZEOF_N_SECTION_OFFSETS (objfile->num_sections));
684 relative_addr_info_to_section_offsets (objfile->section_offsets,
685 objfile->num_sections, addrs);
687 /* For relocatable files, all loadable sections will start at zero.
688 The zero is meaningless, so try to pick arbitrary addresses such
689 that no loadable sections overlap. This algorithm is quadratic,
690 but the number of sections in a single object file is generally
692 if ((bfd_get_file_flags (objfile->obfd) & (EXEC_P | DYNAMIC)) == 0)
694 struct place_section_arg arg;
695 bfd *abfd = objfile->obfd;
698 for (cur_sec = abfd->sections; cur_sec != NULL; cur_sec = cur_sec->next)
699 /* We do not expect this to happen; just skip this step if the
700 relocatable file has a section with an assigned VMA. */
701 if (bfd_section_vma (abfd, cur_sec) != 0)
706 CORE_ADDR *offsets = objfile->section_offsets->offsets;
708 /* Pick non-overlapping offsets for sections the user did not
710 arg.offsets = objfile->section_offsets;
712 bfd_map_over_sections (objfile->obfd, place_section, &arg);
714 /* Correctly filling in the section offsets is not quite
715 enough. Relocatable files have two properties that
716 (most) shared objects do not:
718 - Their debug information will contain relocations. Some
719 shared libraries do also, but many do not, so this can not
722 - If there are multiple code sections they will be loaded
723 at different relative addresses in memory than they are
724 in the objfile, since all sections in the file will start
727 Because GDB has very limited ability to map from an
728 address in debug info to the correct code section,
729 it relies on adding SECT_OFF_TEXT to things which might be
730 code. If we clear all the section offsets, and set the
731 section VMAs instead, then symfile_relocate_debug_section
732 will return meaningful debug information pointing at the
735 GDB has too many different data structures for section
736 addresses - a bfd, objfile, and so_list all have section
737 tables, as does exec_ops. Some of these could probably
740 for (cur_sec = abfd->sections; cur_sec != NULL;
741 cur_sec = cur_sec->next)
743 if ((bfd_get_section_flags (abfd, cur_sec) & SEC_ALLOC) == 0)
746 bfd_set_section_vma (abfd, cur_sec, offsets[cur_sec->index]);
747 exec_set_section_address (bfd_get_filename (abfd),
749 offsets[cur_sec->index]);
750 offsets[cur_sec->index] = 0;
755 /* Remember the bfd indexes for the .text, .data, .bss and
757 init_objfile_sect_indices (objfile);
760 /* Divide the file into segments, which are individual relocatable units.
761 This is the default version of the sym_fns.sym_segments function for
762 symbol readers that do not have an explicit representation of segments.
763 It assumes that object files do not have segments, and fully linked
764 files have a single segment. */
766 struct symfile_segment_data *
767 default_symfile_segments (bfd *abfd)
771 struct symfile_segment_data *data;
774 /* Relocatable files contain enough information to position each
775 loadable section independently; they should not be relocated
777 if ((bfd_get_file_flags (abfd) & (EXEC_P | DYNAMIC)) == 0)
780 /* Make sure there is at least one loadable section in the file. */
781 for (sect = abfd->sections; sect != NULL; sect = sect->next)
783 if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0)
791 low = bfd_get_section_vma (abfd, sect);
792 high = low + bfd_get_section_size (sect);
794 data = XZALLOC (struct symfile_segment_data);
795 data->num_segments = 1;
796 data->segment_bases = XCALLOC (1, CORE_ADDR);
797 data->segment_sizes = XCALLOC (1, CORE_ADDR);
799 num_sections = bfd_count_sections (abfd);
800 data->segment_info = XCALLOC (num_sections, int);
802 for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next)
806 if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0)
809 vma = bfd_get_section_vma (abfd, sect);
812 if (vma + bfd_get_section_size (sect) > high)
813 high = vma + bfd_get_section_size (sect);
815 data->segment_info[i] = 1;
818 data->segment_bases[0] = low;
819 data->segment_sizes[0] = high - low;
824 /* This is a convenience function to call sym_read for OBJFILE and
825 possibly force the partial symbols to be read. */
828 read_symbols (struct objfile *objfile, int add_flags)
830 (*objfile->sf->sym_read) (objfile, add_flags);
832 /* find_separate_debug_file_in_section should be called only if there is
833 single binary with no existing separate debug info file. */
834 if (!objfile_has_partial_symbols (objfile)
835 && objfile->separate_debug_objfile == NULL
836 && objfile->separate_debug_objfile_backlink == NULL)
838 bfd *abfd = find_separate_debug_file_in_section (objfile);
839 struct cleanup *cleanup = make_cleanup_bfd_unref (abfd);
842 symbol_file_add_separate (abfd, add_flags, objfile);
844 do_cleanups (cleanup);
846 if ((add_flags & SYMFILE_NO_READ) == 0)
847 require_partial_symbols (objfile, 0);
850 /* Initialize entry point information for this objfile. */
853 init_entry_point_info (struct objfile *objfile)
855 /* Save startup file's range of PC addresses to help blockframe.c
856 decide where the bottom of the stack is. */
858 if (bfd_get_file_flags (objfile->obfd) & EXEC_P)
860 /* Executable file -- record its entry point so we'll recognize
861 the startup file because it contains the entry point. */
862 objfile->ei.entry_point = bfd_get_start_address (objfile->obfd);
863 objfile->ei.entry_point_p = 1;
865 else if (bfd_get_file_flags (objfile->obfd) & DYNAMIC
866 && bfd_get_start_address (objfile->obfd) != 0)
868 /* Some shared libraries may have entry points set and be
869 runnable. There's no clear way to indicate this, so just check
870 for values other than zero. */
871 objfile->ei.entry_point = bfd_get_start_address (objfile->obfd);
872 objfile->ei.entry_point_p = 1;
876 /* Examination of non-executable.o files. Short-circuit this stuff. */
877 objfile->ei.entry_point_p = 0;
880 if (objfile->ei.entry_point_p)
882 CORE_ADDR entry_point = objfile->ei.entry_point;
884 /* Make certain that the address points at real code, and not a
885 function descriptor. */
887 = gdbarch_convert_from_func_ptr_addr (get_objfile_arch (objfile),
891 /* Remove any ISA markers, so that this matches entries in the
893 objfile->ei.entry_point
894 = gdbarch_addr_bits_remove (get_objfile_arch (objfile), entry_point);
898 /* Process a symbol file, as either the main file or as a dynamically
901 This function does not set the OBJFILE's entry-point info.
903 OBJFILE is where the symbols are to be read from.
905 ADDRS is the list of section load addresses. If the user has given
906 an 'add-symbol-file' command, then this is the list of offsets and
907 addresses he or she provided as arguments to the command; or, if
908 we're handling a shared library, these are the actual addresses the
909 sections are loaded at, according to the inferior's dynamic linker
910 (as gleaned by GDB's shared library code). We convert each address
911 into an offset from the section VMA's as it appears in the object
912 file, and then call the file's sym_offsets function to convert this
913 into a format-specific offset table --- a `struct section_offsets'.
915 ADD_FLAGS encodes verbosity level, whether this is main symbol or
916 an extra symbol file such as dynamically loaded code, and wether
917 breakpoint reset should be deferred. */
920 syms_from_objfile_1 (struct objfile *objfile,
921 struct section_addr_info *addrs,
924 struct section_addr_info *local_addr = NULL;
925 struct cleanup *old_chain;
926 const int mainline = add_flags & SYMFILE_MAINLINE;
928 objfile->sf = find_sym_fns (objfile->obfd);
930 if (objfile->sf == NULL)
932 /* No symbols to load, but we still need to make sure
933 that the section_offsets table is allocated. */
934 int num_sections = gdb_bfd_count_sections (objfile->obfd);
935 size_t size = SIZEOF_N_SECTION_OFFSETS (num_sections);
937 objfile->num_sections = num_sections;
938 objfile->section_offsets
939 = obstack_alloc (&objfile->objfile_obstack, size);
940 memset (objfile->section_offsets, 0, size);
944 /* Make sure that partially constructed symbol tables will be cleaned up
945 if an error occurs during symbol reading. */
946 old_chain = make_cleanup_free_objfile (objfile);
948 /* If ADDRS is NULL, put together a dummy address list.
949 We now establish the convention that an addr of zero means
950 no load address was specified. */
953 local_addr = alloc_section_addr_info (1);
954 make_cleanup (xfree, local_addr);
960 /* We will modify the main symbol table, make sure that all its users
961 will be cleaned up if an error occurs during symbol reading. */
962 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
964 /* Since no error yet, throw away the old symbol table. */
966 if (symfile_objfile != NULL)
968 free_objfile (symfile_objfile);
969 gdb_assert (symfile_objfile == NULL);
972 /* Currently we keep symbols from the add-symbol-file command.
973 If the user wants to get rid of them, they should do "symbol-file"
974 without arguments first. Not sure this is the best behavior
977 (*objfile->sf->sym_new_init) (objfile);
980 /* Convert addr into an offset rather than an absolute address.
981 We find the lowest address of a loaded segment in the objfile,
982 and assume that <addr> is where that got loaded.
984 We no longer warn if the lowest section is not a text segment (as
985 happens for the PA64 port. */
986 if (addrs->num_sections > 0)
987 addr_info_make_relative (addrs, objfile->obfd);
989 /* Initialize symbol reading routines for this objfile, allow complaints to
990 appear for this new file, and record how verbose to be, then do the
991 initial symbol reading for this file. */
993 (*objfile->sf->sym_init) (objfile);
994 clear_complaints (&symfile_complaints, 1, add_flags & SYMFILE_VERBOSE);
996 (*objfile->sf->sym_offsets) (objfile, addrs);
998 read_symbols (objfile, add_flags);
1000 /* Discard cleanups as symbol reading was successful. */
1002 discard_cleanups (old_chain);
1006 /* Same as syms_from_objfile_1, but also initializes the objfile
1007 entry-point info. */
1010 syms_from_objfile (struct objfile *objfile,
1011 struct section_addr_info *addrs,
1014 syms_from_objfile_1 (objfile, addrs, add_flags);
1015 init_entry_point_info (objfile);
1018 /* Perform required actions after either reading in the initial
1019 symbols for a new objfile, or mapping in the symbols from a reusable
1020 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
1023 new_symfile_objfile (struct objfile *objfile, int add_flags)
1025 /* If this is the main symbol file we have to clean up all users of the
1026 old main symbol file. Otherwise it is sufficient to fixup all the
1027 breakpoints that may have been redefined by this symbol file. */
1028 if (add_flags & SYMFILE_MAINLINE)
1030 /* OK, make it the "real" symbol file. */
1031 symfile_objfile = objfile;
1033 clear_symtab_users (add_flags);
1035 else if ((add_flags & SYMFILE_DEFER_BP_RESET) == 0)
1037 breakpoint_re_set ();
1040 /* We're done reading the symbol file; finish off complaints. */
1041 clear_complaints (&symfile_complaints, 0, add_flags & SYMFILE_VERBOSE);
1044 /* Process a symbol file, as either the main file or as a dynamically
1047 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1048 A new reference is acquired by this function.
1050 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1051 extra, such as dynamically loaded code, and what to do with breakpoins.
1053 ADDRS is as described for syms_from_objfile_1, above.
1054 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1056 PARENT is the original objfile if ABFD is a separate debug info file.
1057 Otherwise PARENT is NULL.
1059 Upon success, returns a pointer to the objfile that was added.
1060 Upon failure, jumps back to command level (never returns). */
1062 static struct objfile *
1063 symbol_file_add_with_addrs (bfd *abfd, int add_flags,
1064 struct section_addr_info *addrs,
1065 int flags, struct objfile *parent)
1067 struct objfile *objfile;
1068 const char *name = bfd_get_filename (abfd);
1069 const int from_tty = add_flags & SYMFILE_VERBOSE;
1070 const int mainline = add_flags & SYMFILE_MAINLINE;
1071 const int should_print = ((from_tty || info_verbose)
1072 && (readnow_symbol_files
1073 || (add_flags & SYMFILE_NO_READ) == 0));
1075 if (readnow_symbol_files)
1077 flags |= OBJF_READNOW;
1078 add_flags &= ~SYMFILE_NO_READ;
1081 /* Give user a chance to burp if we'd be
1082 interactively wiping out any existing symbols. */
1084 if ((have_full_symbols () || have_partial_symbols ())
1087 && !query (_("Load new symbol table from \"%s\"? "), name))
1088 error (_("Not confirmed."));
1090 objfile = allocate_objfile (abfd, flags | (mainline ? OBJF_MAINLINE : 0));
1093 add_separate_debug_objfile (objfile, parent);
1095 /* We either created a new mapped symbol table, mapped an existing
1096 symbol table file which has not had initial symbol reading
1097 performed, or need to read an unmapped symbol table. */
1100 if (deprecated_pre_add_symbol_hook)
1101 deprecated_pre_add_symbol_hook (name);
1104 printf_unfiltered (_("Reading symbols from %s..."), name);
1106 gdb_flush (gdb_stdout);
1109 syms_from_objfile (objfile, addrs, add_flags);
1111 /* We now have at least a partial symbol table. Check to see if the
1112 user requested that all symbols be read on initial access via either
1113 the gdb startup command line or on a per symbol file basis. Expand
1114 all partial symbol tables for this objfile if so. */
1116 if ((flags & OBJF_READNOW))
1120 printf_unfiltered (_("expanding to full symbols..."));
1122 gdb_flush (gdb_stdout);
1126 objfile->sf->qf->expand_all_symtabs (objfile);
1129 if (should_print && !objfile_has_symbols (objfile))
1132 printf_unfiltered (_("(no debugging symbols found)..."));
1138 if (deprecated_post_add_symbol_hook)
1139 deprecated_post_add_symbol_hook ();
1141 printf_unfiltered (_("done.\n"));
1144 /* We print some messages regardless of whether 'from_tty ||
1145 info_verbose' is true, so make sure they go out at the right
1147 gdb_flush (gdb_stdout);
1149 if (objfile->sf == NULL)
1151 observer_notify_new_objfile (objfile);
1152 return objfile; /* No symbols. */
1155 new_symfile_objfile (objfile, add_flags);
1157 observer_notify_new_objfile (objfile);
1159 bfd_cache_close_all ();
1163 /* Add BFD as a separate debug file for OBJFILE. */
1166 symbol_file_add_separate (bfd *bfd, int symfile_flags, struct objfile *objfile)
1168 struct objfile *new_objfile;
1169 struct section_addr_info *sap;
1170 struct cleanup *my_cleanup;
1172 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1173 because sections of BFD may not match sections of OBJFILE and because
1174 vma may have been modified by tools such as prelink. */
1175 sap = build_section_addr_info_from_objfile (objfile);
1176 my_cleanup = make_cleanup_free_section_addr_info (sap);
1178 new_objfile = symbol_file_add_with_addrs
1179 (bfd, symfile_flags, sap,
1180 objfile->flags & (OBJF_REORDERED | OBJF_SHARED | OBJF_READNOW
1184 do_cleanups (my_cleanup);
1187 /* Process the symbol file ABFD, as either the main file or as a
1188 dynamically loaded file.
1189 See symbol_file_add_with_addrs's comments for details. */
1192 symbol_file_add_from_bfd (bfd *abfd, int add_flags,
1193 struct section_addr_info *addrs,
1194 int flags, struct objfile *parent)
1196 return symbol_file_add_with_addrs (abfd, add_flags, addrs, flags, parent);
1199 /* Process a symbol file, as either the main file or as a dynamically
1200 loaded file. See symbol_file_add_with_addrs's comments for details. */
1203 symbol_file_add (char *name, int add_flags, struct section_addr_info *addrs,
1206 bfd *bfd = symfile_bfd_open (name);
1207 struct cleanup *cleanup = make_cleanup_bfd_unref (bfd);
1208 struct objfile *objf;
1210 objf = symbol_file_add_from_bfd (bfd, add_flags, addrs, flags, NULL);
1211 do_cleanups (cleanup);
1215 /* Call symbol_file_add() with default values and update whatever is
1216 affected by the loading of a new main().
1217 Used when the file is supplied in the gdb command line
1218 and by some targets with special loading requirements.
1219 The auxiliary function, symbol_file_add_main_1(), has the flags
1220 argument for the switches that can only be specified in the symbol_file
1224 symbol_file_add_main (char *args, int from_tty)
1226 symbol_file_add_main_1 (args, from_tty, 0);
1230 symbol_file_add_main_1 (char *args, int from_tty, int flags)
1232 const int add_flags = (current_inferior ()->symfile_flags
1233 | SYMFILE_MAINLINE | (from_tty ? SYMFILE_VERBOSE : 0));
1235 symbol_file_add (args, add_flags, NULL, flags);
1237 /* Getting new symbols may change our opinion about
1238 what is frameless. */
1239 reinit_frame_cache ();
1241 if ((flags & SYMFILE_NO_READ) == 0)
1242 set_initial_language ();
1246 symbol_file_clear (int from_tty)
1248 if ((have_full_symbols () || have_partial_symbols ())
1251 ? !query (_("Discard symbol table from `%s'? "),
1252 symfile_objfile->name)
1253 : !query (_("Discard symbol table? "))))
1254 error (_("Not confirmed."));
1256 /* solib descriptors may have handles to objfiles. Wipe them before their
1257 objfiles get stale by free_all_objfiles. */
1258 no_shared_libraries (NULL, from_tty);
1260 free_all_objfiles ();
1262 gdb_assert (symfile_objfile == NULL);
1264 printf_unfiltered (_("No symbol file now.\n"));
1268 separate_debug_file_exists (const char *name, unsigned long crc,
1269 struct objfile *parent_objfile)
1271 unsigned long file_crc;
1274 struct stat parent_stat, abfd_stat;
1275 int verified_as_different;
1277 /* Find a separate debug info file as if symbols would be present in
1278 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1279 section can contain just the basename of PARENT_OBJFILE without any
1280 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1281 the separate debug infos with the same basename can exist. */
1283 if (filename_cmp (name, parent_objfile->name) == 0)
1286 abfd = gdb_bfd_open_maybe_remote (name);
1291 /* Verify symlinks were not the cause of filename_cmp name difference above.
1293 Some operating systems, e.g. Windows, do not provide a meaningful
1294 st_ino; they always set it to zero. (Windows does provide a
1295 meaningful st_dev.) Do not indicate a duplicate library in that
1296 case. While there is no guarantee that a system that provides
1297 meaningful inode numbers will never set st_ino to zero, this is
1298 merely an optimization, so we do not need to worry about false
1301 if (bfd_stat (abfd, &abfd_stat) == 0
1302 && abfd_stat.st_ino != 0
1303 && bfd_stat (parent_objfile->obfd, &parent_stat) == 0)
1305 if (abfd_stat.st_dev == parent_stat.st_dev
1306 && abfd_stat.st_ino == parent_stat.st_ino)
1308 gdb_bfd_unref (abfd);
1311 verified_as_different = 1;
1314 verified_as_different = 0;
1316 file_crc_p = gdb_bfd_crc (abfd, &file_crc);
1318 gdb_bfd_unref (abfd);
1323 if (crc != file_crc)
1325 unsigned long parent_crc;
1327 /* If one (or both) the files are accessed for example the via "remote:"
1328 gdbserver way it does not support the bfd_stat operation. Verify
1329 whether those two files are not the same manually. */
1331 if (!verified_as_different)
1333 if (!gdb_bfd_crc (parent_objfile->obfd, &parent_crc))
1337 if (verified_as_different || parent_crc != file_crc)
1338 warning (_("the debug information found in \"%s\""
1339 " does not match \"%s\" (CRC mismatch).\n"),
1340 name, parent_objfile->name);
1348 char *debug_file_directory = NULL;
1350 show_debug_file_directory (struct ui_file *file, int from_tty,
1351 struct cmd_list_element *c, const char *value)
1353 fprintf_filtered (file,
1354 _("The directory where separate debug "
1355 "symbols are searched for is \"%s\".\n"),
1359 #if ! defined (DEBUG_SUBDIRECTORY)
1360 #define DEBUG_SUBDIRECTORY ".debug"
1363 /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
1364 where the original file resides (may not be the same as
1365 dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are
1366 looking for. CANON_DIR is the "realpath" form of DIR.
1367 DIR must contain a trailing '/'.
1368 Returns the path of the file with separate debug info, of NULL. */
1371 find_separate_debug_file (const char *dir,
1372 const char *canon_dir,
1373 const char *debuglink,
1374 unsigned long crc32, struct objfile *objfile)
1379 VEC (char_ptr) *debugdir_vec;
1380 struct cleanup *back_to;
1383 /* Set I to max (strlen (canon_dir), strlen (dir)). */
1385 if (canon_dir != NULL && strlen (canon_dir) > i)
1386 i = strlen (canon_dir);
1388 debugfile = xmalloc (strlen (debug_file_directory) + 1
1390 + strlen (DEBUG_SUBDIRECTORY)
1392 + strlen (debuglink)
1395 /* First try in the same directory as the original file. */
1396 strcpy (debugfile, dir);
1397 strcat (debugfile, debuglink);
1399 if (separate_debug_file_exists (debugfile, crc32, objfile))
1402 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1403 strcpy (debugfile, dir);
1404 strcat (debugfile, DEBUG_SUBDIRECTORY);
1405 strcat (debugfile, "/");
1406 strcat (debugfile, debuglink);
1408 if (separate_debug_file_exists (debugfile, crc32, objfile))
1411 /* Then try in the global debugfile directories.
1413 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1414 cause "/..." lookups. */
1416 debugdir_vec = dirnames_to_char_ptr_vec (debug_file_directory);
1417 back_to = make_cleanup_free_char_ptr_vec (debugdir_vec);
1419 for (ix = 0; VEC_iterate (char_ptr, debugdir_vec, ix, debugdir); ++ix)
1421 strcpy (debugfile, debugdir);
1422 strcat (debugfile, "/");
1423 strcat (debugfile, dir);
1424 strcat (debugfile, debuglink);
1426 if (separate_debug_file_exists (debugfile, crc32, objfile))
1428 do_cleanups (back_to);
1432 /* If the file is in the sysroot, try using its base path in the
1433 global debugfile directory. */
1434 if (canon_dir != NULL
1435 && filename_ncmp (canon_dir, gdb_sysroot,
1436 strlen (gdb_sysroot)) == 0
1437 && IS_DIR_SEPARATOR (canon_dir[strlen (gdb_sysroot)]))
1439 strcpy (debugfile, debugdir);
1440 strcat (debugfile, canon_dir + strlen (gdb_sysroot));
1441 strcat (debugfile, "/");
1442 strcat (debugfile, debuglink);
1444 if (separate_debug_file_exists (debugfile, crc32, objfile))
1446 do_cleanups (back_to);
1452 do_cleanups (back_to);
1457 /* Modify PATH to contain only "[/]directory/" part of PATH.
1458 If there were no directory separators in PATH, PATH will be empty
1459 string on return. */
1462 terminate_after_last_dir_separator (char *path)
1466 /* Strip off the final filename part, leaving the directory name,
1467 followed by a slash. The directory can be relative or absolute. */
1468 for (i = strlen(path) - 1; i >= 0; i--)
1469 if (IS_DIR_SEPARATOR (path[i]))
1472 /* If I is -1 then no directory is present there and DIR will be "". */
1476 /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section).
1477 Returns pathname, or NULL. */
1480 find_separate_debug_file_by_debuglink (struct objfile *objfile)
1483 char *dir, *canon_dir;
1485 unsigned long crc32;
1486 struct cleanup *cleanups;
1488 debuglink = bfd_get_debug_link_info (objfile->obfd, &crc32);
1490 if (debuglink == NULL)
1492 /* There's no separate debug info, hence there's no way we could
1493 load it => no warning. */
1497 cleanups = make_cleanup (xfree, debuglink);
1498 dir = xstrdup (objfile->name);
1499 make_cleanup (xfree, dir);
1500 terminate_after_last_dir_separator (dir);
1501 canon_dir = lrealpath (dir);
1503 debugfile = find_separate_debug_file (dir, canon_dir, debuglink,
1507 if (debugfile == NULL)
1510 /* For PR gdb/9538, try again with realpath (if different from the
1515 if (lstat (objfile->name, &st_buf) == 0 && S_ISLNK(st_buf.st_mode))
1519 symlink_dir = lrealpath (objfile->name);
1520 if (symlink_dir != NULL)
1522 make_cleanup (xfree, symlink_dir);
1523 terminate_after_last_dir_separator (symlink_dir);
1524 if (strcmp (dir, symlink_dir) != 0)
1526 /* Different directory, so try using it. */
1527 debugfile = find_separate_debug_file (symlink_dir,
1535 #endif /* HAVE_LSTAT */
1538 do_cleanups (cleanups);
1542 /* This is the symbol-file command. Read the file, analyze its
1543 symbols, and add a struct symtab to a symtab list. The syntax of
1544 the command is rather bizarre:
1546 1. The function buildargv implements various quoting conventions
1547 which are undocumented and have little or nothing in common with
1548 the way things are quoted (or not quoted) elsewhere in GDB.
1550 2. Options are used, which are not generally used in GDB (perhaps
1551 "set mapped on", "set readnow on" would be better)
1553 3. The order of options matters, which is contrary to GNU
1554 conventions (because it is confusing and inconvenient). */
1557 symbol_file_command (char *args, int from_tty)
1563 symbol_file_clear (from_tty);
1567 char **argv = gdb_buildargv (args);
1568 int flags = OBJF_USERLOADED;
1569 struct cleanup *cleanups;
1572 cleanups = make_cleanup_freeargv (argv);
1573 while (*argv != NULL)
1575 if (strcmp (*argv, "-readnow") == 0)
1576 flags |= OBJF_READNOW;
1577 else if (**argv == '-')
1578 error (_("unknown option `%s'"), *argv);
1581 symbol_file_add_main_1 (*argv, from_tty, flags);
1589 error (_("no symbol file name was specified"));
1591 do_cleanups (cleanups);
1595 /* Set the initial language.
1597 FIXME: A better solution would be to record the language in the
1598 psymtab when reading partial symbols, and then use it (if known) to
1599 set the language. This would be a win for formats that encode the
1600 language in an easily discoverable place, such as DWARF. For
1601 stabs, we can jump through hoops looking for specially named
1602 symbols or try to intuit the language from the specific type of
1603 stabs we find, but we can't do that until later when we read in
1607 set_initial_language (void)
1609 enum language lang = language_unknown;
1611 if (language_of_main != language_unknown)
1612 lang = language_of_main;
1615 char *name = main_name ();
1616 struct symbol *sym = lookup_symbol (name, NULL, VAR_DOMAIN, NULL);
1619 lang = SYMBOL_LANGUAGE (sym);
1622 if (lang == language_unknown)
1624 /* Make C the default language */
1628 set_language (lang);
1629 expected_language = current_language; /* Don't warn the user. */
1632 /* If NAME is a remote name open the file using remote protocol, otherwise
1633 open it normally. Returns a new reference to the BFD. On error,
1634 returns NULL with the BFD error set. */
1637 gdb_bfd_open_maybe_remote (const char *name)
1641 if (remote_filename_p (name))
1642 result = remote_bfd_open (name, gnutarget);
1644 result = gdb_bfd_open (name, gnutarget, -1);
1649 /* Open the file specified by NAME and hand it off to BFD for
1650 preliminary analysis. Return a newly initialized bfd *, which
1651 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1652 absolute). In case of trouble, error() is called. */
1655 symfile_bfd_open (char *name)
1659 char *absolute_name;
1660 struct cleanup *back_to;
1662 if (remote_filename_p (name))
1664 sym_bfd = remote_bfd_open (name, gnutarget);
1666 error (_("`%s': can't open to read symbols: %s."), name,
1667 bfd_errmsg (bfd_get_error ()));
1669 if (!bfd_check_format (sym_bfd, bfd_object))
1671 make_cleanup_bfd_unref (sym_bfd);
1672 error (_("`%s': can't read symbols: %s."), name,
1673 bfd_errmsg (bfd_get_error ()));
1679 name = tilde_expand (name); /* Returns 1st new malloc'd copy. */
1681 /* Look down path for it, allocate 2nd new malloc'd copy. */
1682 desc = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH, name,
1683 O_RDONLY | O_BINARY, &absolute_name);
1684 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1687 char *exename = alloca (strlen (name) + 5);
1689 strcat (strcpy (exename, name), ".exe");
1690 desc = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH,
1691 exename, O_RDONLY | O_BINARY, &absolute_name);
1696 make_cleanup (xfree, name);
1697 perror_with_name (name);
1701 name = absolute_name;
1702 back_to = make_cleanup (xfree, name);
1704 sym_bfd = gdb_bfd_open (name, gnutarget, desc);
1706 error (_("`%s': can't open to read symbols: %s."), name,
1707 bfd_errmsg (bfd_get_error ()));
1708 bfd_set_cacheable (sym_bfd, 1);
1710 if (!bfd_check_format (sym_bfd, bfd_object))
1712 make_cleanup_bfd_unref (sym_bfd);
1713 error (_("`%s': can't read symbols: %s."), name,
1714 bfd_errmsg (bfd_get_error ()));
1717 do_cleanups (back_to);
1722 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1723 the section was not found. */
1726 get_section_index (struct objfile *objfile, char *section_name)
1728 asection *sect = bfd_get_section_by_name (objfile->obfd, section_name);
1736 /* Link SF into the global symtab_fns list. Called on startup by the
1737 _initialize routine in each object file format reader, to register
1738 information about each format the reader is prepared to handle. */
1741 add_symtab_fns (const struct sym_fns *sf)
1743 VEC_safe_push (sym_fns_ptr, symtab_fns, sf);
1746 /* Initialize OBJFILE to read symbols from its associated BFD. It
1747 either returns or calls error(). The result is an initialized
1748 struct sym_fns in the objfile structure, that contains cached
1749 information about the symbol file. */
1751 static const struct sym_fns *
1752 find_sym_fns (bfd *abfd)
1754 const struct sym_fns *sf;
1755 enum bfd_flavour our_flavour = bfd_get_flavour (abfd);
1758 if (our_flavour == bfd_target_srec_flavour
1759 || our_flavour == bfd_target_ihex_flavour
1760 || our_flavour == bfd_target_tekhex_flavour)
1761 return NULL; /* No symbols. */
1763 for (i = 0; VEC_iterate (sym_fns_ptr, symtab_fns, i, sf); ++i)
1764 if (our_flavour == sf->sym_flavour)
1767 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1768 bfd_get_target (abfd));
1772 /* This function runs the load command of our current target. */
1775 load_command (char *arg, int from_tty)
1777 struct cleanup *cleanup = make_cleanup (null_cleanup, NULL);
1781 /* The user might be reloading because the binary has changed. Take
1782 this opportunity to check. */
1783 reopen_exec_file ();
1791 parg = arg = get_exec_file (1);
1793 /* Count how many \ " ' tab space there are in the name. */
1794 while ((parg = strpbrk (parg, "\\\"'\t ")))
1802 /* We need to quote this string so buildargv can pull it apart. */
1803 char *temp = xmalloc (strlen (arg) + count + 1 );
1807 make_cleanup (xfree, temp);
1810 while ((parg = strpbrk (parg, "\\\"'\t ")))
1812 strncpy (ptemp, prev, parg - prev);
1813 ptemp += parg - prev;
1817 strcpy (ptemp, prev);
1823 target_load (arg, from_tty);
1825 /* After re-loading the executable, we don't really know which
1826 overlays are mapped any more. */
1827 overlay_cache_invalid = 1;
1829 do_cleanups (cleanup);
1832 /* This version of "load" should be usable for any target. Currently
1833 it is just used for remote targets, not inftarg.c or core files,
1834 on the theory that only in that case is it useful.
1836 Avoiding xmodem and the like seems like a win (a) because we don't have
1837 to worry about finding it, and (b) On VMS, fork() is very slow and so
1838 we don't want to run a subprocess. On the other hand, I'm not sure how
1839 performance compares. */
1841 static int validate_download = 0;
1843 /* Callback service function for generic_load (bfd_map_over_sections). */
1846 add_section_size_callback (bfd *abfd, asection *asec, void *data)
1848 bfd_size_type *sum = data;
1850 *sum += bfd_get_section_size (asec);
1853 /* Opaque data for load_section_callback. */
1854 struct load_section_data {
1855 CORE_ADDR load_offset;
1856 struct load_progress_data *progress_data;
1857 VEC(memory_write_request_s) *requests;
1860 /* Opaque data for load_progress. */
1861 struct load_progress_data {
1862 /* Cumulative data. */
1863 unsigned long write_count;
1864 unsigned long data_count;
1865 bfd_size_type total_size;
1868 /* Opaque data for load_progress for a single section. */
1869 struct load_progress_section_data {
1870 struct load_progress_data *cumulative;
1872 /* Per-section data. */
1873 const char *section_name;
1874 ULONGEST section_sent;
1875 ULONGEST section_size;
1880 /* Target write callback routine for progress reporting. */
1883 load_progress (ULONGEST bytes, void *untyped_arg)
1885 struct load_progress_section_data *args = untyped_arg;
1886 struct load_progress_data *totals;
1889 /* Writing padding data. No easy way to get at the cumulative
1890 stats, so just ignore this. */
1893 totals = args->cumulative;
1895 if (bytes == 0 && args->section_sent == 0)
1897 /* The write is just starting. Let the user know we've started
1899 ui_out_message (current_uiout, 0, "Loading section %s, size %s lma %s\n",
1900 args->section_name, hex_string (args->section_size),
1901 paddress (target_gdbarch (), args->lma));
1905 if (validate_download)
1907 /* Broken memories and broken monitors manifest themselves here
1908 when bring new computers to life. This doubles already slow
1910 /* NOTE: cagney/1999-10-18: A more efficient implementation
1911 might add a verify_memory() method to the target vector and
1912 then use that. remote.c could implement that method using
1913 the ``qCRC'' packet. */
1914 gdb_byte *check = xmalloc (bytes);
1915 struct cleanup *verify_cleanups = make_cleanup (xfree, check);
1917 if (target_read_memory (args->lma, check, bytes) != 0)
1918 error (_("Download verify read failed at %s"),
1919 paddress (target_gdbarch (), args->lma));
1920 if (memcmp (args->buffer, check, bytes) != 0)
1921 error (_("Download verify compare failed at %s"),
1922 paddress (target_gdbarch (), args->lma));
1923 do_cleanups (verify_cleanups);
1925 totals->data_count += bytes;
1927 args->buffer += bytes;
1928 totals->write_count += 1;
1929 args->section_sent += bytes;
1930 if (check_quit_flag ()
1931 || (deprecated_ui_load_progress_hook != NULL
1932 && deprecated_ui_load_progress_hook (args->section_name,
1933 args->section_sent)))
1934 error (_("Canceled the download"));
1936 if (deprecated_show_load_progress != NULL)
1937 deprecated_show_load_progress (args->section_name,
1941 totals->total_size);
1944 /* Callback service function for generic_load (bfd_map_over_sections). */
1947 load_section_callback (bfd *abfd, asection *asec, void *data)
1949 struct memory_write_request *new_request;
1950 struct load_section_data *args = data;
1951 struct load_progress_section_data *section_data;
1952 bfd_size_type size = bfd_get_section_size (asec);
1954 const char *sect_name = bfd_get_section_name (abfd, asec);
1956 if ((bfd_get_section_flags (abfd, asec) & SEC_LOAD) == 0)
1962 new_request = VEC_safe_push (memory_write_request_s,
1963 args->requests, NULL);
1964 memset (new_request, 0, sizeof (struct memory_write_request));
1965 section_data = xcalloc (1, sizeof (struct load_progress_section_data));
1966 new_request->begin = bfd_section_lma (abfd, asec) + args->load_offset;
1967 new_request->end = new_request->begin + size; /* FIXME Should size
1969 new_request->data = xmalloc (size);
1970 new_request->baton = section_data;
1972 buffer = new_request->data;
1974 section_data->cumulative = args->progress_data;
1975 section_data->section_name = sect_name;
1976 section_data->section_size = size;
1977 section_data->lma = new_request->begin;
1978 section_data->buffer = buffer;
1980 bfd_get_section_contents (abfd, asec, buffer, 0, size);
1983 /* Clean up an entire memory request vector, including load
1984 data and progress records. */
1987 clear_memory_write_data (void *arg)
1989 VEC(memory_write_request_s) **vec_p = arg;
1990 VEC(memory_write_request_s) *vec = *vec_p;
1992 struct memory_write_request *mr;
1994 for (i = 0; VEC_iterate (memory_write_request_s, vec, i, mr); ++i)
1999 VEC_free (memory_write_request_s, vec);
2003 generic_load (char *args, int from_tty)
2006 struct timeval start_time, end_time;
2008 struct cleanup *old_cleanups = make_cleanup (null_cleanup, 0);
2009 struct load_section_data cbdata;
2010 struct load_progress_data total_progress;
2011 struct ui_out *uiout = current_uiout;
2016 memset (&cbdata, 0, sizeof (cbdata));
2017 memset (&total_progress, 0, sizeof (total_progress));
2018 cbdata.progress_data = &total_progress;
2020 make_cleanup (clear_memory_write_data, &cbdata.requests);
2023 error_no_arg (_("file to load"));
2025 argv = gdb_buildargv (args);
2026 make_cleanup_freeargv (argv);
2028 filename = tilde_expand (argv[0]);
2029 make_cleanup (xfree, filename);
2031 if (argv[1] != NULL)
2035 cbdata.load_offset = strtoulst (argv[1], &endptr, 0);
2037 /* If the last word was not a valid number then
2038 treat it as a file name with spaces in. */
2039 if (argv[1] == endptr)
2040 error (_("Invalid download offset:%s."), argv[1]);
2042 if (argv[2] != NULL)
2043 error (_("Too many parameters."));
2046 /* Open the file for loading. */
2047 loadfile_bfd = gdb_bfd_open (filename, gnutarget, -1);
2048 if (loadfile_bfd == NULL)
2050 perror_with_name (filename);
2054 make_cleanup_bfd_unref (loadfile_bfd);
2056 if (!bfd_check_format (loadfile_bfd, bfd_object))
2058 error (_("\"%s\" is not an object file: %s"), filename,
2059 bfd_errmsg (bfd_get_error ()));
2062 bfd_map_over_sections (loadfile_bfd, add_section_size_callback,
2063 (void *) &total_progress.total_size);
2065 bfd_map_over_sections (loadfile_bfd, load_section_callback, &cbdata);
2067 gettimeofday (&start_time, NULL);
2069 if (target_write_memory_blocks (cbdata.requests, flash_discard,
2070 load_progress) != 0)
2071 error (_("Load failed"));
2073 gettimeofday (&end_time, NULL);
2075 entry = bfd_get_start_address (loadfile_bfd);
2076 entry = gdbarch_addr_bits_remove (target_gdbarch (), entry);
2077 ui_out_text (uiout, "Start address ");
2078 ui_out_field_fmt (uiout, "address", "%s", paddress (target_gdbarch (), entry));
2079 ui_out_text (uiout, ", load size ");
2080 ui_out_field_fmt (uiout, "load-size", "%lu", total_progress.data_count);
2081 ui_out_text (uiout, "\n");
2082 /* We were doing this in remote-mips.c, I suspect it is right
2083 for other targets too. */
2084 regcache_write_pc (get_current_regcache (), entry);
2086 /* Reset breakpoints, now that we have changed the load image. For
2087 instance, breakpoints may have been set (or reset, by
2088 post_create_inferior) while connected to the target but before we
2089 loaded the program. In that case, the prologue analyzer could
2090 have read instructions from the target to find the right
2091 breakpoint locations. Loading has changed the contents of that
2094 breakpoint_re_set ();
2096 /* FIXME: are we supposed to call symbol_file_add or not? According
2097 to a comment from remote-mips.c (where a call to symbol_file_add
2098 was commented out), making the call confuses GDB if more than one
2099 file is loaded in. Some targets do (e.g., remote-vx.c) but
2100 others don't (or didn't - perhaps they have all been deleted). */
2102 print_transfer_performance (gdb_stdout, total_progress.data_count,
2103 total_progress.write_count,
2104 &start_time, &end_time);
2106 do_cleanups (old_cleanups);
2109 /* Report how fast the transfer went. */
2112 print_transfer_performance (struct ui_file *stream,
2113 unsigned long data_count,
2114 unsigned long write_count,
2115 const struct timeval *start_time,
2116 const struct timeval *end_time)
2118 ULONGEST time_count;
2119 struct ui_out *uiout = current_uiout;
2121 /* Compute the elapsed time in milliseconds, as a tradeoff between
2122 accuracy and overflow. */
2123 time_count = (end_time->tv_sec - start_time->tv_sec) * 1000;
2124 time_count += (end_time->tv_usec - start_time->tv_usec) / 1000;
2126 ui_out_text (uiout, "Transfer rate: ");
2129 unsigned long rate = ((ULONGEST) data_count * 1000) / time_count;
2131 if (ui_out_is_mi_like_p (uiout))
2133 ui_out_field_fmt (uiout, "transfer-rate", "%lu", rate * 8);
2134 ui_out_text (uiout, " bits/sec");
2136 else if (rate < 1024)
2138 ui_out_field_fmt (uiout, "transfer-rate", "%lu", rate);
2139 ui_out_text (uiout, " bytes/sec");
2143 ui_out_field_fmt (uiout, "transfer-rate", "%lu", rate / 1024);
2144 ui_out_text (uiout, " KB/sec");
2149 ui_out_field_fmt (uiout, "transferred-bits", "%lu", (data_count * 8));
2150 ui_out_text (uiout, " bits in <1 sec");
2152 if (write_count > 0)
2154 ui_out_text (uiout, ", ");
2155 ui_out_field_fmt (uiout, "write-rate", "%lu", data_count / write_count);
2156 ui_out_text (uiout, " bytes/write");
2158 ui_out_text (uiout, ".\n");
2161 /* This function allows the addition of incrementally linked object files.
2162 It does not modify any state in the target, only in the debugger. */
2163 /* Note: ezannoni 2000-04-13 This function/command used to have a
2164 special case syntax for the rombug target (Rombug is the boot
2165 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2166 rombug case, the user doesn't need to supply a text address,
2167 instead a call to target_link() (in target.c) would supply the
2168 value to use. We are now discontinuing this type of ad hoc syntax. */
2171 add_symbol_file_command (char *args, int from_tty)
2173 struct gdbarch *gdbarch = get_current_arch ();
2174 char *filename = NULL;
2175 int flags = OBJF_USERLOADED;
2177 int section_index = 0;
2181 int expecting_sec_name = 0;
2182 int expecting_sec_addr = 0;
2191 struct section_addr_info *section_addrs;
2192 struct sect_opt *sect_opts = NULL;
2193 size_t num_sect_opts = 0;
2194 struct cleanup *my_cleanups = make_cleanup (null_cleanup, NULL);
2197 sect_opts = (struct sect_opt *) xmalloc (num_sect_opts
2198 * sizeof (struct sect_opt));
2203 error (_("add-symbol-file takes a file name and an address"));
2205 argv = gdb_buildargv (args);
2206 make_cleanup_freeargv (argv);
2208 for (arg = argv[0], argcnt = 0; arg != NULL; arg = argv[++argcnt])
2210 /* Process the argument. */
2213 /* The first argument is the file name. */
2214 filename = tilde_expand (arg);
2215 make_cleanup (xfree, filename);
2217 else if (argcnt == 1)
2219 /* The second argument is always the text address at which
2220 to load the program. */
2221 sect_opts[section_index].name = ".text";
2222 sect_opts[section_index].value = arg;
2223 if (++section_index >= num_sect_opts)
2226 sect_opts = ((struct sect_opt *)
2227 xrealloc (sect_opts,
2229 * sizeof (struct sect_opt)));
2234 /* It's an option (starting with '-') or it's an argument
2236 if (expecting_sec_name)
2238 sect_opts[section_index].name = arg;
2239 expecting_sec_name = 0;
2241 else if (expecting_sec_addr)
2243 sect_opts[section_index].value = arg;
2244 expecting_sec_addr = 0;
2245 if (++section_index >= num_sect_opts)
2248 sect_opts = ((struct sect_opt *)
2249 xrealloc (sect_opts,
2251 * sizeof (struct sect_opt)));
2254 else if (strcmp (arg, "-readnow") == 0)
2255 flags |= OBJF_READNOW;
2256 else if (strcmp (arg, "-s") == 0)
2258 expecting_sec_name = 1;
2259 expecting_sec_addr = 1;
2262 error (_("USAGE: add-symbol-file <filename> <textaddress>"
2263 " [-readnow] [-s <secname> <addr>]*"));
2267 /* This command takes at least two arguments. The first one is a
2268 filename, and the second is the address where this file has been
2269 loaded. Abort now if this address hasn't been provided by the
2271 if (section_index < 1)
2272 error (_("The address where %s has been loaded is missing"), filename);
2274 /* Print the prompt for the query below. And save the arguments into
2275 a sect_addr_info structure to be passed around to other
2276 functions. We have to split this up into separate print
2277 statements because hex_string returns a local static
2280 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename);
2281 section_addrs = alloc_section_addr_info (section_index);
2282 make_cleanup (xfree, section_addrs);
2283 for (i = 0; i < section_index; i++)
2286 char *val = sect_opts[i].value;
2287 char *sec = sect_opts[i].name;
2289 addr = parse_and_eval_address (val);
2291 /* Here we store the section offsets in the order they were
2292 entered on the command line. */
2293 section_addrs->other[sec_num].name = sec;
2294 section_addrs->other[sec_num].addr = addr;
2295 printf_unfiltered ("\t%s_addr = %s\n", sec,
2296 paddress (gdbarch, addr));
2299 /* The object's sections are initialized when a
2300 call is made to build_objfile_section_table (objfile).
2301 This happens in reread_symbols.
2302 At this point, we don't know what file type this is,
2303 so we can't determine what section names are valid. */
2305 section_addrs->num_sections = sec_num;
2307 if (from_tty && (!query ("%s", "")))
2308 error (_("Not confirmed."));
2310 symbol_file_add (filename, from_tty ? SYMFILE_VERBOSE : 0,
2311 section_addrs, flags);
2313 /* Getting new symbols may change our opinion about what is
2315 reinit_frame_cache ();
2316 do_cleanups (my_cleanups);
2320 typedef struct objfile *objfilep;
2322 DEF_VEC_P (objfilep);
2324 /* Re-read symbols if a symbol-file has changed. */
2327 reread_symbols (void)
2329 struct objfile *objfile;
2331 struct stat new_statbuf;
2333 VEC (objfilep) *new_objfiles = NULL;
2334 struct cleanup *all_cleanups;
2336 all_cleanups = make_cleanup (VEC_cleanup (objfilep), &new_objfiles);
2338 /* With the addition of shared libraries, this should be modified,
2339 the load time should be saved in the partial symbol tables, since
2340 different tables may come from different source files. FIXME.
2341 This routine should then walk down each partial symbol table
2342 and see if the symbol table that it originates from has been changed. */
2344 for (objfile = object_files; objfile; objfile = objfile->next)
2346 /* solib-sunos.c creates one objfile with obfd. */
2347 if (objfile->obfd == NULL)
2350 /* Separate debug objfiles are handled in the main objfile. */
2351 if (objfile->separate_debug_objfile_backlink)
2354 /* If this object is from an archive (what you usually create with
2355 `ar', often called a `static library' on most systems, though
2356 a `shared library' on AIX is also an archive), then you should
2357 stat on the archive name, not member name. */
2358 if (objfile->obfd->my_archive)
2359 res = stat (objfile->obfd->my_archive->filename, &new_statbuf);
2361 res = stat (objfile->name, &new_statbuf);
2364 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2365 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2369 new_modtime = new_statbuf.st_mtime;
2370 if (new_modtime != objfile->mtime)
2372 struct cleanup *old_cleanups;
2373 struct section_offsets *offsets;
2376 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2379 /* There are various functions like symbol_file_add,
2380 symfile_bfd_open, syms_from_objfile, etc., which might
2381 appear to do what we want. But they have various other
2382 effects which we *don't* want. So we just do stuff
2383 ourselves. We don't worry about mapped files (for one thing,
2384 any mapped file will be out of date). */
2386 /* If we get an error, blow away this objfile (not sure if
2387 that is the correct response for things like shared
2389 old_cleanups = make_cleanup_free_objfile (objfile);
2390 /* We need to do this whenever any symbols go away. */
2391 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
2393 if (exec_bfd != NULL
2394 && filename_cmp (bfd_get_filename (objfile->obfd),
2395 bfd_get_filename (exec_bfd)) == 0)
2397 /* Reload EXEC_BFD without asking anything. */
2399 exec_file_attach (bfd_get_filename (objfile->obfd), 0);
2402 /* Keep the calls order approx. the same as in free_objfile. */
2404 /* Free the separate debug objfiles. It will be
2405 automatically recreated by sym_read. */
2406 free_objfile_separate_debug (objfile);
2408 /* Remove any references to this objfile in the global
2410 preserve_values (objfile);
2412 /* Nuke all the state that we will re-read. Much of the following
2413 code which sets things to NULL really is necessary to tell
2414 other parts of GDB that there is nothing currently there.
2416 Try to keep the freeing order compatible with free_objfile. */
2418 if (objfile->sf != NULL)
2420 (*objfile->sf->sym_finish) (objfile);
2423 clear_objfile_data (objfile);
2425 /* Clean up any state BFD has sitting around. */
2427 struct bfd *obfd = objfile->obfd;
2428 char *obfd_filename;
2430 obfd_filename = bfd_get_filename (objfile->obfd);
2431 /* Open the new BFD before freeing the old one, so that
2432 the filename remains live. */
2433 objfile->obfd = gdb_bfd_open_maybe_remote (obfd_filename);
2434 if (objfile->obfd == NULL)
2436 /* We have to make a cleanup and error here, rather
2437 than erroring later, because once we unref OBFD,
2438 OBFD_FILENAME will be freed. */
2439 make_cleanup_bfd_unref (obfd);
2440 error (_("Can't open %s to read symbols."), obfd_filename);
2442 gdb_bfd_unref (obfd);
2445 objfile->name = bfd_get_filename (objfile->obfd);
2446 /* bfd_openr sets cacheable to true, which is what we want. */
2447 if (!bfd_check_format (objfile->obfd, bfd_object))
2448 error (_("Can't read symbols from %s: %s."), objfile->name,
2449 bfd_errmsg (bfd_get_error ()));
2451 /* Save the offsets, we will nuke them with the rest of the
2453 num_offsets = objfile->num_sections;
2454 offsets = ((struct section_offsets *)
2455 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets)));
2456 memcpy (offsets, objfile->section_offsets,
2457 SIZEOF_N_SECTION_OFFSETS (num_offsets));
2459 /* FIXME: Do we have to free a whole linked list, or is this
2461 if (objfile->global_psymbols.list)
2462 xfree (objfile->global_psymbols.list);
2463 memset (&objfile->global_psymbols, 0,
2464 sizeof (objfile->global_psymbols));
2465 if (objfile->static_psymbols.list)
2466 xfree (objfile->static_psymbols.list);
2467 memset (&objfile->static_psymbols, 0,
2468 sizeof (objfile->static_psymbols));
2470 /* Free the obstacks for non-reusable objfiles. */
2471 psymbol_bcache_free (objfile->psymbol_cache);
2472 objfile->psymbol_cache = psymbol_bcache_init ();
2473 if (objfile->demangled_names_hash != NULL)
2475 htab_delete (objfile->demangled_names_hash);
2476 objfile->demangled_names_hash = NULL;
2478 obstack_free (&objfile->objfile_obstack, 0);
2479 objfile->sections = NULL;
2480 objfile->symtabs = NULL;
2481 objfile->psymtabs = NULL;
2482 objfile->psymtabs_addrmap = NULL;
2483 objfile->free_psymtabs = NULL;
2484 objfile->template_symbols = NULL;
2485 objfile->msymbols = NULL;
2486 objfile->minimal_symbol_count = 0;
2487 memset (&objfile->msymbol_hash, 0,
2488 sizeof (objfile->msymbol_hash));
2489 memset (&objfile->msymbol_demangled_hash, 0,
2490 sizeof (objfile->msymbol_demangled_hash));
2492 set_objfile_per_bfd (objfile);
2494 /* obstack_init also initializes the obstack so it is
2495 empty. We could use obstack_specify_allocation but
2496 gdb_obstack.h specifies the alloc/dealloc functions. */
2497 obstack_init (&objfile->objfile_obstack);
2499 /* Reset the sym_fns pointer. The ELF reader can change it
2500 based on whether .gdb_index is present, and we need it to
2501 start over. PR symtab/15885 */
2502 objfile->sf = find_sym_fns (objfile->obfd);
2504 build_objfile_section_table (objfile);
2505 terminate_minimal_symbol_table (objfile);
2507 /* We use the same section offsets as from last time. I'm not
2508 sure whether that is always correct for shared libraries. */
2509 objfile->section_offsets = (struct section_offsets *)
2510 obstack_alloc (&objfile->objfile_obstack,
2511 SIZEOF_N_SECTION_OFFSETS (num_offsets));
2512 memcpy (objfile->section_offsets, offsets,
2513 SIZEOF_N_SECTION_OFFSETS (num_offsets));
2514 objfile->num_sections = num_offsets;
2516 /* What the hell is sym_new_init for, anyway? The concept of
2517 distinguishing between the main file and additional files
2518 in this way seems rather dubious. */
2519 if (objfile == symfile_objfile)
2521 (*objfile->sf->sym_new_init) (objfile);
2524 (*objfile->sf->sym_init) (objfile);
2525 clear_complaints (&symfile_complaints, 1, 1);
2527 objfile->flags &= ~OBJF_PSYMTABS_READ;
2528 read_symbols (objfile, 0);
2530 if (!objfile_has_symbols (objfile))
2533 printf_unfiltered (_("(no debugging symbols found)\n"));
2537 /* We're done reading the symbol file; finish off complaints. */
2538 clear_complaints (&symfile_complaints, 0, 1);
2540 /* Getting new symbols may change our opinion about what is
2543 reinit_frame_cache ();
2545 /* Discard cleanups as symbol reading was successful. */
2546 discard_cleanups (old_cleanups);
2548 /* If the mtime has changed between the time we set new_modtime
2549 and now, we *want* this to be out of date, so don't call stat
2551 objfile->mtime = new_modtime;
2552 init_entry_point_info (objfile);
2554 VEC_safe_push (objfilep, new_objfiles, objfile);
2562 /* Notify objfiles that we've modified objfile sections. */
2563 objfiles_changed ();
2565 clear_symtab_users (0);
2567 /* clear_objfile_data for each objfile was called before freeing it and
2568 observer_notify_new_objfile (NULL) has been called by
2569 clear_symtab_users above. Notify the new files now. */
2570 for (ix = 0; VEC_iterate (objfilep, new_objfiles, ix, objfile); ix++)
2571 observer_notify_new_objfile (objfile);
2573 /* At least one objfile has changed, so we can consider that
2574 the executable we're debugging has changed too. */
2575 observer_notify_executable_changed ();
2578 do_cleanups (all_cleanups);
2589 static filename_language *filename_language_table;
2590 static int fl_table_size, fl_table_next;
2593 add_filename_language (char *ext, enum language lang)
2595 if (fl_table_next >= fl_table_size)
2597 fl_table_size += 10;
2598 filename_language_table =
2599 xrealloc (filename_language_table,
2600 fl_table_size * sizeof (*filename_language_table));
2603 filename_language_table[fl_table_next].ext = xstrdup (ext);
2604 filename_language_table[fl_table_next].lang = lang;
2608 static char *ext_args;
2610 show_ext_args (struct ui_file *file, int from_tty,
2611 struct cmd_list_element *c, const char *value)
2613 fprintf_filtered (file,
2614 _("Mapping between filename extension "
2615 "and source language is \"%s\".\n"),
2620 set_ext_lang_command (char *args, int from_tty, struct cmd_list_element *e)
2623 char *cp = ext_args;
2626 /* First arg is filename extension, starting with '.' */
2628 error (_("'%s': Filename extension must begin with '.'"), ext_args);
2630 /* Find end of first arg. */
2631 while (*cp && !isspace (*cp))
2635 error (_("'%s': two arguments required -- "
2636 "filename extension and language"),
2639 /* Null-terminate first arg. */
2642 /* Find beginning of second arg, which should be a source language. */
2643 cp = skip_spaces (cp);
2646 error (_("'%s': two arguments required -- "
2647 "filename extension and language"),
2650 /* Lookup the language from among those we know. */
2651 lang = language_enum (cp);
2653 /* Now lookup the filename extension: do we already know it? */
2654 for (i = 0; i < fl_table_next; i++)
2655 if (0 == strcmp (ext_args, filename_language_table[i].ext))
2658 if (i >= fl_table_next)
2660 /* New file extension. */
2661 add_filename_language (ext_args, lang);
2665 /* Redefining a previously known filename extension. */
2668 /* query ("Really make files of type %s '%s'?", */
2669 /* ext_args, language_str (lang)); */
2671 xfree (filename_language_table[i].ext);
2672 filename_language_table[i].ext = xstrdup (ext_args);
2673 filename_language_table[i].lang = lang;
2678 info_ext_lang_command (char *args, int from_tty)
2682 printf_filtered (_("Filename extensions and the languages they represent:"));
2683 printf_filtered ("\n\n");
2684 for (i = 0; i < fl_table_next; i++)
2685 printf_filtered ("\t%s\t- %s\n",
2686 filename_language_table[i].ext,
2687 language_str (filename_language_table[i].lang));
2691 init_filename_language_table (void)
2693 if (fl_table_size == 0) /* Protect against repetition. */
2697 filename_language_table =
2698 xmalloc (fl_table_size * sizeof (*filename_language_table));
2699 add_filename_language (".c", language_c);
2700 add_filename_language (".d", language_d);
2701 add_filename_language (".C", language_cplus);
2702 add_filename_language (".cc", language_cplus);
2703 add_filename_language (".cp", language_cplus);
2704 add_filename_language (".cpp", language_cplus);
2705 add_filename_language (".cxx", language_cplus);
2706 add_filename_language (".c++", language_cplus);
2707 add_filename_language (".java", language_java);
2708 add_filename_language (".class", language_java);
2709 add_filename_language (".m", language_objc);
2710 add_filename_language (".f", language_fortran);
2711 add_filename_language (".F", language_fortran);
2712 add_filename_language (".for", language_fortran);
2713 add_filename_language (".FOR", language_fortran);
2714 add_filename_language (".ftn", language_fortran);
2715 add_filename_language (".FTN", language_fortran);
2716 add_filename_language (".fpp", language_fortran);
2717 add_filename_language (".FPP", language_fortran);
2718 add_filename_language (".f90", language_fortran);
2719 add_filename_language (".F90", language_fortran);
2720 add_filename_language (".f95", language_fortran);
2721 add_filename_language (".F95", language_fortran);
2722 add_filename_language (".f03", language_fortran);
2723 add_filename_language (".F03", language_fortran);
2724 add_filename_language (".f08", language_fortran);
2725 add_filename_language (".F08", language_fortran);
2726 add_filename_language (".s", language_asm);
2727 add_filename_language (".sx", language_asm);
2728 add_filename_language (".S", language_asm);
2729 add_filename_language (".pas", language_pascal);
2730 add_filename_language (".p", language_pascal);
2731 add_filename_language (".pp", language_pascal);
2732 add_filename_language (".adb", language_ada);
2733 add_filename_language (".ads", language_ada);
2734 add_filename_language (".a", language_ada);
2735 add_filename_language (".ada", language_ada);
2736 add_filename_language (".dg", language_ada);
2741 deduce_language_from_filename (const char *filename)
2746 if (filename != NULL)
2747 if ((cp = strrchr (filename, '.')) != NULL)
2748 for (i = 0; i < fl_table_next; i++)
2749 if (strcmp (cp, filename_language_table[i].ext) == 0)
2750 return filename_language_table[i].lang;
2752 return language_unknown;
2757 Allocate and partly initialize a new symbol table. Return a pointer
2758 to it. error() if no space.
2760 Caller must set these fields:
2769 allocate_symtab (const char *filename, struct objfile *objfile)
2771 struct symtab *symtab;
2773 symtab = (struct symtab *)
2774 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symtab));
2775 memset (symtab, 0, sizeof (*symtab));
2776 symtab->filename = (char *) bcache (filename, strlen (filename) + 1,
2777 objfile->per_bfd->filename_cache);
2778 symtab->fullname = NULL;
2779 symtab->language = deduce_language_from_filename (filename);
2780 symtab->debugformat = "unknown";
2782 /* Hook it to the objfile it comes from. */
2784 symtab->objfile = objfile;
2785 symtab->next = objfile->symtabs;
2786 objfile->symtabs = symtab;
2788 if (symtab_create_debug)
2790 /* Be a bit clever with debugging messages, and don't print objfile
2791 every time, only when it changes. */
2792 static char *last_objfile_name = NULL;
2794 if (last_objfile_name == NULL
2795 || strcmp (last_objfile_name, objfile->name) != 0)
2797 xfree (last_objfile_name);
2798 last_objfile_name = xstrdup (objfile->name);
2799 fprintf_unfiltered (gdb_stdlog,
2800 "Creating one or more symtabs for objfile %s ...\n",
2803 fprintf_unfiltered (gdb_stdlog,
2804 "Created symtab %s for module %s.\n",
2805 host_address_to_string (symtab), filename);
2812 /* Reset all data structures in gdb which may contain references to symbol
2813 table data. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
2816 clear_symtab_users (int add_flags)
2818 /* Someday, we should do better than this, by only blowing away
2819 the things that really need to be blown. */
2821 /* Clear the "current" symtab first, because it is no longer valid.
2822 breakpoint_re_set may try to access the current symtab. */
2823 clear_current_source_symtab_and_line ();
2826 if ((add_flags & SYMFILE_DEFER_BP_RESET) == 0)
2827 breakpoint_re_set ();
2828 clear_last_displayed_sal ();
2829 clear_pc_function_cache ();
2830 observer_notify_new_objfile (NULL);
2832 /* Clear globals which might have pointed into a removed objfile.
2833 FIXME: It's not clear which of these are supposed to persist
2834 between expressions and which ought to be reset each time. */
2835 expression_context_block = NULL;
2836 innermost_block = NULL;
2838 /* Varobj may refer to old symbols, perform a cleanup. */
2839 varobj_invalidate ();
2844 clear_symtab_users_cleanup (void *ignore)
2846 clear_symtab_users (0);
2850 The following code implements an abstraction for debugging overlay sections.
2852 The target model is as follows:
2853 1) The gnu linker will permit multiple sections to be mapped into the
2854 same VMA, each with its own unique LMA (or load address).
2855 2) It is assumed that some runtime mechanism exists for mapping the
2856 sections, one by one, from the load address into the VMA address.
2857 3) This code provides a mechanism for gdb to keep track of which
2858 sections should be considered to be mapped from the VMA to the LMA.
2859 This information is used for symbol lookup, and memory read/write.
2860 For instance, if a section has been mapped then its contents
2861 should be read from the VMA, otherwise from the LMA.
2863 Two levels of debugger support for overlays are available. One is
2864 "manual", in which the debugger relies on the user to tell it which
2865 overlays are currently mapped. This level of support is
2866 implemented entirely in the core debugger, and the information about
2867 whether a section is mapped is kept in the objfile->obj_section table.
2869 The second level of support is "automatic", and is only available if
2870 the target-specific code provides functionality to read the target's
2871 overlay mapping table, and translate its contents for the debugger
2872 (by updating the mapped state information in the obj_section tables).
2874 The interface is as follows:
2876 overlay map <name> -- tell gdb to consider this section mapped
2877 overlay unmap <name> -- tell gdb to consider this section unmapped
2878 overlay list -- list the sections that GDB thinks are mapped
2879 overlay read-target -- get the target's state of what's mapped
2880 overlay off/manual/auto -- set overlay debugging state
2881 Functional interface:
2882 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2883 section, return that section.
2884 find_pc_overlay(pc): find any overlay section that contains
2885 the pc, either in its VMA or its LMA
2886 section_is_mapped(sect): true if overlay is marked as mapped
2887 section_is_overlay(sect): true if section's VMA != LMA
2888 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2889 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2890 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2891 overlay_mapped_address(...): map an address from section's LMA to VMA
2892 overlay_unmapped_address(...): map an address from section's VMA to LMA
2893 symbol_overlayed_address(...): Return a "current" address for symbol:
2894 either in VMA or LMA depending on whether
2895 the symbol's section is currently mapped. */
2897 /* Overlay debugging state: */
2899 enum overlay_debugging_state overlay_debugging = ovly_off;
2900 int overlay_cache_invalid = 0; /* True if need to refresh mapped state. */
2902 /* Function: section_is_overlay (SECTION)
2903 Returns true if SECTION has VMA not equal to LMA, ie.
2904 SECTION is loaded at an address different from where it will "run". */
2907 section_is_overlay (struct obj_section *section)
2909 if (overlay_debugging && section)
2911 bfd *abfd = section->objfile->obfd;
2912 asection *bfd_section = section->the_bfd_section;
2914 if (bfd_section_lma (abfd, bfd_section) != 0
2915 && bfd_section_lma (abfd, bfd_section)
2916 != bfd_section_vma (abfd, bfd_section))
2923 /* Function: overlay_invalidate_all (void)
2924 Invalidate the mapped state of all overlay sections (mark it as stale). */
2927 overlay_invalidate_all (void)
2929 struct objfile *objfile;
2930 struct obj_section *sect;
2932 ALL_OBJSECTIONS (objfile, sect)
2933 if (section_is_overlay (sect))
2934 sect->ovly_mapped = -1;
2937 /* Function: section_is_mapped (SECTION)
2938 Returns true if section is an overlay, and is currently mapped.
2940 Access to the ovly_mapped flag is restricted to this function, so
2941 that we can do automatic update. If the global flag
2942 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2943 overlay_invalidate_all. If the mapped state of the particular
2944 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2947 section_is_mapped (struct obj_section *osect)
2949 struct gdbarch *gdbarch;
2951 if (osect == 0 || !section_is_overlay (osect))
2954 switch (overlay_debugging)
2958 return 0; /* overlay debugging off */
2959 case ovly_auto: /* overlay debugging automatic */
2960 /* Unles there is a gdbarch_overlay_update function,
2961 there's really nothing useful to do here (can't really go auto). */
2962 gdbarch = get_objfile_arch (osect->objfile);
2963 if (gdbarch_overlay_update_p (gdbarch))
2965 if (overlay_cache_invalid)
2967 overlay_invalidate_all ();
2968 overlay_cache_invalid = 0;
2970 if (osect->ovly_mapped == -1)
2971 gdbarch_overlay_update (gdbarch, osect);
2973 /* fall thru to manual case */
2974 case ovly_on: /* overlay debugging manual */
2975 return osect->ovly_mapped == 1;
2979 /* Function: pc_in_unmapped_range
2980 If PC falls into the lma range of SECTION, return true, else false. */
2983 pc_in_unmapped_range (CORE_ADDR pc, struct obj_section *section)
2985 if (section_is_overlay (section))
2987 bfd *abfd = section->objfile->obfd;
2988 asection *bfd_section = section->the_bfd_section;
2990 /* We assume the LMA is relocated by the same offset as the VMA. */
2991 bfd_vma size = bfd_get_section_size (bfd_section);
2992 CORE_ADDR offset = obj_section_offset (section);
2994 if (bfd_get_section_lma (abfd, bfd_section) + offset <= pc
2995 && pc < bfd_get_section_lma (abfd, bfd_section) + offset + size)
3002 /* Function: pc_in_mapped_range
3003 If PC falls into the vma range of SECTION, return true, else false. */
3006 pc_in_mapped_range (CORE_ADDR pc, struct obj_section *section)
3008 if (section_is_overlay (section))
3010 if (obj_section_addr (section) <= pc
3011 && pc < obj_section_endaddr (section))
3018 /* Return true if the mapped ranges of sections A and B overlap, false
3022 sections_overlap (struct obj_section *a, struct obj_section *b)
3024 CORE_ADDR a_start = obj_section_addr (a);
3025 CORE_ADDR a_end = obj_section_endaddr (a);
3026 CORE_ADDR b_start = obj_section_addr (b);
3027 CORE_ADDR b_end = obj_section_endaddr (b);
3029 return (a_start < b_end && b_start < a_end);
3032 /* Function: overlay_unmapped_address (PC, SECTION)
3033 Returns the address corresponding to PC in the unmapped (load) range.
3034 May be the same as PC. */
3037 overlay_unmapped_address (CORE_ADDR pc, struct obj_section *section)
3039 if (section_is_overlay (section) && pc_in_mapped_range (pc, section))
3041 bfd *abfd = section->objfile->obfd;
3042 asection *bfd_section = section->the_bfd_section;
3044 return pc + bfd_section_lma (abfd, bfd_section)
3045 - bfd_section_vma (abfd, bfd_section);
3051 /* Function: overlay_mapped_address (PC, SECTION)
3052 Returns the address corresponding to PC in the mapped (runtime) range.
3053 May be the same as PC. */
3056 overlay_mapped_address (CORE_ADDR pc, struct obj_section *section)
3058 if (section_is_overlay (section) && pc_in_unmapped_range (pc, section))
3060 bfd *abfd = section->objfile->obfd;
3061 asection *bfd_section = section->the_bfd_section;
3063 return pc + bfd_section_vma (abfd, bfd_section)
3064 - bfd_section_lma (abfd, bfd_section);
3070 /* Function: symbol_overlayed_address
3071 Return one of two addresses (relative to the VMA or to the LMA),
3072 depending on whether the section is mapped or not. */
3075 symbol_overlayed_address (CORE_ADDR address, struct obj_section *section)
3077 if (overlay_debugging)
3079 /* If the symbol has no section, just return its regular address. */
3082 /* If the symbol's section is not an overlay, just return its
3084 if (!section_is_overlay (section))
3086 /* If the symbol's section is mapped, just return its address. */
3087 if (section_is_mapped (section))
3090 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3091 * then return its LOADED address rather than its vma address!!
3093 return overlay_unmapped_address (address, section);
3098 /* Function: find_pc_overlay (PC)
3099 Return the best-match overlay section for PC:
3100 If PC matches a mapped overlay section's VMA, return that section.
3101 Else if PC matches an unmapped section's VMA, return that section.
3102 Else if PC matches an unmapped section's LMA, return that section. */
3104 struct obj_section *
3105 find_pc_overlay (CORE_ADDR pc)
3107 struct objfile *objfile;
3108 struct obj_section *osect, *best_match = NULL;
3110 if (overlay_debugging)
3111 ALL_OBJSECTIONS (objfile, osect)
3112 if (section_is_overlay (osect))
3114 if (pc_in_mapped_range (pc, osect))
3116 if (section_is_mapped (osect))
3121 else if (pc_in_unmapped_range (pc, osect))
3127 /* Function: find_pc_mapped_section (PC)
3128 If PC falls into the VMA address range of an overlay section that is
3129 currently marked as MAPPED, return that section. Else return NULL. */
3131 struct obj_section *
3132 find_pc_mapped_section (CORE_ADDR pc)
3134 struct objfile *objfile;
3135 struct obj_section *osect;
3137 if (overlay_debugging)
3138 ALL_OBJSECTIONS (objfile, osect)
3139 if (pc_in_mapped_range (pc, osect) && section_is_mapped (osect))
3145 /* Function: list_overlays_command
3146 Print a list of mapped sections and their PC ranges. */
3149 list_overlays_command (char *args, int from_tty)
3152 struct objfile *objfile;
3153 struct obj_section *osect;
3155 if (overlay_debugging)
3156 ALL_OBJSECTIONS (objfile, osect)
3157 if (section_is_mapped (osect))
3159 struct gdbarch *gdbarch = get_objfile_arch (objfile);
3164 vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section);
3165 lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section);
3166 size = bfd_get_section_size (osect->the_bfd_section);
3167 name = bfd_section_name (objfile->obfd, osect->the_bfd_section);
3169 printf_filtered ("Section %s, loaded at ", name);
3170 fputs_filtered (paddress (gdbarch, lma), gdb_stdout);
3171 puts_filtered (" - ");
3172 fputs_filtered (paddress (gdbarch, lma + size), gdb_stdout);
3173 printf_filtered (", mapped at ");
3174 fputs_filtered (paddress (gdbarch, vma), gdb_stdout);
3175 puts_filtered (" - ");
3176 fputs_filtered (paddress (gdbarch, vma + size), gdb_stdout);
3177 puts_filtered ("\n");
3182 printf_filtered (_("No sections are mapped.\n"));
3185 /* Function: map_overlay_command
3186 Mark the named section as mapped (ie. residing at its VMA address). */
3189 map_overlay_command (char *args, int from_tty)
3191 struct objfile *objfile, *objfile2;
3192 struct obj_section *sec, *sec2;
3194 if (!overlay_debugging)
3195 error (_("Overlay debugging not enabled. Use "
3196 "either the 'overlay auto' or\n"
3197 "the 'overlay manual' command."));
3199 if (args == 0 || *args == 0)
3200 error (_("Argument required: name of an overlay section"));
3202 /* First, find a section matching the user supplied argument. */
3203 ALL_OBJSECTIONS (objfile, sec)
3204 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
3206 /* Now, check to see if the section is an overlay. */
3207 if (!section_is_overlay (sec))
3208 continue; /* not an overlay section */
3210 /* Mark the overlay as "mapped". */
3211 sec->ovly_mapped = 1;
3213 /* Next, make a pass and unmap any sections that are
3214 overlapped by this new section: */
3215 ALL_OBJSECTIONS (objfile2, sec2)
3216 if (sec2->ovly_mapped && sec != sec2 && sections_overlap (sec, sec2))
3219 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3220 bfd_section_name (objfile->obfd,
3221 sec2->the_bfd_section));
3222 sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2. */
3226 error (_("No overlay section called %s"), args);
3229 /* Function: unmap_overlay_command
3230 Mark the overlay section as unmapped
3231 (ie. resident in its LMA address range, rather than the VMA range). */
3234 unmap_overlay_command (char *args, int from_tty)
3236 struct objfile *objfile;
3237 struct obj_section *sec;
3239 if (!overlay_debugging)
3240 error (_("Overlay debugging not enabled. "
3241 "Use either the 'overlay auto' or\n"
3242 "the 'overlay manual' command."));
3244 if (args == 0 || *args == 0)
3245 error (_("Argument required: name of an overlay section"));
3247 /* First, find a section matching the user supplied argument. */
3248 ALL_OBJSECTIONS (objfile, sec)
3249 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
3251 if (!sec->ovly_mapped)
3252 error (_("Section %s is not mapped"), args);
3253 sec->ovly_mapped = 0;
3256 error (_("No overlay section called %s"), args);
3259 /* Function: overlay_auto_command
3260 A utility command to turn on overlay debugging.
3261 Possibly this should be done via a set/show command. */
3264 overlay_auto_command (char *args, int from_tty)
3266 overlay_debugging = ovly_auto;
3267 enable_overlay_breakpoints ();
3269 printf_unfiltered (_("Automatic overlay debugging enabled."));
3272 /* Function: overlay_manual_command
3273 A utility command to turn on overlay debugging.
3274 Possibly this should be done via a set/show command. */
3277 overlay_manual_command (char *args, int from_tty)
3279 overlay_debugging = ovly_on;
3280 disable_overlay_breakpoints ();
3282 printf_unfiltered (_("Overlay debugging enabled."));
3285 /* Function: overlay_off_command
3286 A utility command to turn on overlay debugging.
3287 Possibly this should be done via a set/show command. */
3290 overlay_off_command (char *args, int from_tty)
3292 overlay_debugging = ovly_off;
3293 disable_overlay_breakpoints ();
3295 printf_unfiltered (_("Overlay debugging disabled."));
3299 overlay_load_command (char *args, int from_tty)
3301 struct gdbarch *gdbarch = get_current_arch ();
3303 if (gdbarch_overlay_update_p (gdbarch))
3304 gdbarch_overlay_update (gdbarch, NULL);
3306 error (_("This target does not know how to read its overlay state."));
3309 /* Function: overlay_command
3310 A place-holder for a mis-typed command. */
3312 /* Command list chain containing all defined "overlay" subcommands. */
3313 static struct cmd_list_element *overlaylist;
3316 overlay_command (char *args, int from_tty)
3319 ("\"overlay\" must be followed by the name of an overlay command.\n");
3320 help_list (overlaylist, "overlay ", -1, gdb_stdout);
3323 /* Target Overlays for the "Simplest" overlay manager:
3325 This is GDB's default target overlay layer. It works with the
3326 minimal overlay manager supplied as an example by Cygnus. The
3327 entry point is via a function pointer "gdbarch_overlay_update",
3328 so targets that use a different runtime overlay manager can
3329 substitute their own overlay_update function and take over the
3332 The overlay_update function pokes around in the target's data structures
3333 to see what overlays are mapped, and updates GDB's overlay mapping with
3336 In this simple implementation, the target data structures are as follows:
3337 unsigned _novlys; /# number of overlay sections #/
3338 unsigned _ovly_table[_novlys][4] = {
3339 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3340 {..., ..., ..., ...},
3342 unsigned _novly_regions; /# number of overlay regions #/
3343 unsigned _ovly_region_table[_novly_regions][3] = {
3344 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3347 These functions will attempt to update GDB's mappedness state in the
3348 symbol section table, based on the target's mappedness state.
3350 To do this, we keep a cached copy of the target's _ovly_table, and
3351 attempt to detect when the cached copy is invalidated. The main
3352 entry point is "simple_overlay_update(SECT), which looks up SECT in
3353 the cached table and re-reads only the entry for that section from
3354 the target (whenever possible). */
3356 /* Cached, dynamically allocated copies of the target data structures: */
3357 static unsigned (*cache_ovly_table)[4] = 0;
3358 static unsigned cache_novlys = 0;
3359 static CORE_ADDR cache_ovly_table_base = 0;
3362 VMA, SIZE, LMA, MAPPED
3365 /* Throw away the cached copy of _ovly_table. */
3368 simple_free_overlay_table (void)
3370 if (cache_ovly_table)
3371 xfree (cache_ovly_table);
3373 cache_ovly_table = NULL;
3374 cache_ovly_table_base = 0;
3377 /* Read an array of ints of size SIZE from the target into a local buffer.
3378 Convert to host order. int LEN is number of ints. */
3381 read_target_long_array (CORE_ADDR memaddr, unsigned int *myaddr,
3382 int len, int size, enum bfd_endian byte_order)
3384 /* FIXME (alloca): Not safe if array is very large. */
3385 gdb_byte *buf = alloca (len * size);
3388 read_memory (memaddr, buf, len * size);
3389 for (i = 0; i < len; i++)
3390 myaddr[i] = extract_unsigned_integer (size * i + buf, size, byte_order);
3393 /* Find and grab a copy of the target _ovly_table
3394 (and _novlys, which is needed for the table's size). */
3397 simple_read_overlay_table (void)
3399 struct minimal_symbol *novlys_msym;
3400 struct bound_minimal_symbol ovly_table_msym;
3401 struct gdbarch *gdbarch;
3403 enum bfd_endian byte_order;
3405 simple_free_overlay_table ();
3406 novlys_msym = lookup_minimal_symbol ("_novlys", NULL, NULL);
3409 error (_("Error reading inferior's overlay table: "
3410 "couldn't find `_novlys' variable\n"
3411 "in inferior. Use `overlay manual' mode."));
3415 ovly_table_msym = lookup_bound_minimal_symbol ("_ovly_table");
3416 if (! ovly_table_msym.minsym)
3418 error (_("Error reading inferior's overlay table: couldn't find "
3419 "`_ovly_table' array\n"
3420 "in inferior. Use `overlay manual' mode."));
3424 gdbarch = get_objfile_arch (ovly_table_msym.objfile);
3425 word_size = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT;
3426 byte_order = gdbarch_byte_order (gdbarch);
3428 cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym),
3431 = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table));
3432 cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (ovly_table_msym.minsym);
3433 read_target_long_array (cache_ovly_table_base,
3434 (unsigned int *) cache_ovly_table,
3435 cache_novlys * 4, word_size, byte_order);
3437 return 1; /* SUCCESS */
3440 /* Function: simple_overlay_update_1
3441 A helper function for simple_overlay_update. Assuming a cached copy
3442 of _ovly_table exists, look through it to find an entry whose vma,
3443 lma and size match those of OSECT. Re-read the entry and make sure
3444 it still matches OSECT (else the table may no longer be valid).
3445 Set OSECT's mapped state to match the entry. Return: 1 for
3446 success, 0 for failure. */
3449 simple_overlay_update_1 (struct obj_section *osect)
3452 bfd *obfd = osect->objfile->obfd;
3453 asection *bsect = osect->the_bfd_section;
3454 struct gdbarch *gdbarch = get_objfile_arch (osect->objfile);
3455 int word_size = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT;
3456 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3458 size = bfd_get_section_size (osect->the_bfd_section);
3459 for (i = 0; i < cache_novlys; i++)
3460 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3461 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3462 /* && cache_ovly_table[i][SIZE] == size */ )
3464 read_target_long_array (cache_ovly_table_base + i * word_size,
3465 (unsigned int *) cache_ovly_table[i],
3466 4, word_size, byte_order);
3467 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3468 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3469 /* && cache_ovly_table[i][SIZE] == size */ )
3471 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3474 else /* Warning! Warning! Target's ovly table has changed! */
3480 /* Function: simple_overlay_update
3481 If OSECT is NULL, then update all sections' mapped state
3482 (after re-reading the entire target _ovly_table).
3483 If OSECT is non-NULL, then try to find a matching entry in the
3484 cached ovly_table and update only OSECT's mapped state.
3485 If a cached entry can't be found or the cache isn't valid, then
3486 re-read the entire cache, and go ahead and update all sections. */
3489 simple_overlay_update (struct obj_section *osect)
3491 struct objfile *objfile;
3493 /* Were we given an osect to look up? NULL means do all of them. */
3495 /* Have we got a cached copy of the target's overlay table? */
3496 if (cache_ovly_table != NULL)
3498 /* Does its cached location match what's currently in the
3500 struct minimal_symbol *minsym
3501 = lookup_minimal_symbol ("_ovly_table", NULL, NULL);
3504 error (_("Error reading inferior's overlay table: couldn't "
3505 "find `_ovly_table' array\n"
3506 "in inferior. Use `overlay manual' mode."));
3508 if (cache_ovly_table_base == SYMBOL_VALUE_ADDRESS (minsym))
3509 /* Then go ahead and try to look up this single section in
3511 if (simple_overlay_update_1 (osect))
3512 /* Found it! We're done. */
3516 /* Cached table no good: need to read the entire table anew.
3517 Or else we want all the sections, in which case it's actually
3518 more efficient to read the whole table in one block anyway. */
3520 if (! simple_read_overlay_table ())
3523 /* Now may as well update all sections, even if only one was requested. */
3524 ALL_OBJSECTIONS (objfile, osect)
3525 if (section_is_overlay (osect))
3528 bfd *obfd = osect->objfile->obfd;
3529 asection *bsect = osect->the_bfd_section;
3531 size = bfd_get_section_size (bsect);
3532 for (i = 0; i < cache_novlys; i++)
3533 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3534 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3535 /* && cache_ovly_table[i][SIZE] == size */ )
3536 { /* obj_section matches i'th entry in ovly_table. */
3537 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3538 break; /* finished with inner for loop: break out. */
3543 /* Set the output sections and output offsets for section SECTP in
3544 ABFD. The relocation code in BFD will read these offsets, so we
3545 need to be sure they're initialized. We map each section to itself,
3546 with no offset; this means that SECTP->vma will be honored. */
3549 symfile_dummy_outputs (bfd *abfd, asection *sectp, void *dummy)
3551 sectp->output_section = sectp;
3552 sectp->output_offset = 0;
3555 /* Default implementation for sym_relocate. */
3558 default_symfile_relocate (struct objfile *objfile, asection *sectp,
3561 /* Use sectp->owner instead of objfile->obfd. sectp may point to a
3563 bfd *abfd = sectp->owner;
3565 /* We're only interested in sections with relocation
3567 if ((sectp->flags & SEC_RELOC) == 0)
3570 /* We will handle section offsets properly elsewhere, so relocate as if
3571 all sections begin at 0. */
3572 bfd_map_over_sections (abfd, symfile_dummy_outputs, NULL);
3574 return bfd_simple_get_relocated_section_contents (abfd, sectp, buf, NULL);
3577 /* Relocate the contents of a debug section SECTP in ABFD. The
3578 contents are stored in BUF if it is non-NULL, or returned in a
3579 malloc'd buffer otherwise.
3581 For some platforms and debug info formats, shared libraries contain
3582 relocations against the debug sections (particularly for DWARF-2;
3583 one affected platform is PowerPC GNU/Linux, although it depends on
3584 the version of the linker in use). Also, ELF object files naturally
3585 have unresolved relocations for their debug sections. We need to apply
3586 the relocations in order to get the locations of symbols correct.
3587 Another example that may require relocation processing, is the
3588 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3592 symfile_relocate_debug_section (struct objfile *objfile,
3593 asection *sectp, bfd_byte *buf)
3595 gdb_assert (objfile->sf->sym_relocate);
3597 return (*objfile->sf->sym_relocate) (objfile, sectp, buf);
3600 struct symfile_segment_data *
3601 get_symfile_segment_data (bfd *abfd)
3603 const struct sym_fns *sf = find_sym_fns (abfd);
3608 return sf->sym_segments (abfd);
3612 free_symfile_segment_data (struct symfile_segment_data *data)
3614 xfree (data->segment_bases);
3615 xfree (data->segment_sizes);
3616 xfree (data->segment_info);
3621 - DATA, containing segment addresses from the object file ABFD, and
3622 the mapping from ABFD's sections onto the segments that own them,
3624 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3625 segment addresses reported by the target,
3626 store the appropriate offsets for each section in OFFSETS.
3628 If there are fewer entries in SEGMENT_BASES than there are segments
3629 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3631 If there are more entries, then ignore the extra. The target may
3632 not be able to distinguish between an empty data segment and a
3633 missing data segment; a missing text segment is less plausible. */
3636 symfile_map_offsets_to_segments (bfd *abfd,
3637 const struct symfile_segment_data *data,
3638 struct section_offsets *offsets,
3639 int num_segment_bases,
3640 const CORE_ADDR *segment_bases)
3645 /* It doesn't make sense to call this function unless you have some
3646 segment base addresses. */
3647 gdb_assert (num_segment_bases > 0);
3649 /* If we do not have segment mappings for the object file, we
3650 can not relocate it by segments. */
3651 gdb_assert (data != NULL);
3652 gdb_assert (data->num_segments > 0);
3654 for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next)
3656 int which = data->segment_info[i];
3658 gdb_assert (0 <= which && which <= data->num_segments);
3660 /* Don't bother computing offsets for sections that aren't
3661 loaded as part of any segment. */
3665 /* Use the last SEGMENT_BASES entry as the address of any extra
3666 segments mentioned in DATA->segment_info. */
3667 if (which > num_segment_bases)
3668 which = num_segment_bases;
3670 offsets->offsets[i] = (segment_bases[which - 1]
3671 - data->segment_bases[which - 1]);
3678 symfile_find_segment_sections (struct objfile *objfile)
3680 bfd *abfd = objfile->obfd;
3683 struct symfile_segment_data *data;
3685 data = get_symfile_segment_data (objfile->obfd);
3689 if (data->num_segments != 1 && data->num_segments != 2)
3691 free_symfile_segment_data (data);
3695 for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next)
3697 int which = data->segment_info[i];
3701 if (objfile->sect_index_text == -1)
3702 objfile->sect_index_text = sect->index;
3704 if (objfile->sect_index_rodata == -1)
3705 objfile->sect_index_rodata = sect->index;
3707 else if (which == 2)
3709 if (objfile->sect_index_data == -1)
3710 objfile->sect_index_data = sect->index;
3712 if (objfile->sect_index_bss == -1)
3713 objfile->sect_index_bss = sect->index;
3717 free_symfile_segment_data (data);
3721 _initialize_symfile (void)
3723 struct cmd_list_element *c;
3725 c = add_cmd ("symbol-file", class_files, symbol_file_command, _("\
3726 Load symbol table from executable file FILE.\n\
3727 The `file' command can also load symbol tables, as well as setting the file\n\
3728 to execute."), &cmdlist);
3729 set_cmd_completer (c, filename_completer);
3731 c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command, _("\
3732 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3733 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR>\
3734 ...]\nADDR is the starting address of the file's text.\n\
3735 The optional arguments are section-name section-address pairs and\n\
3736 should be specified if the data and bss segments are not contiguous\n\
3737 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3739 set_cmd_completer (c, filename_completer);
3741 c = add_cmd ("load", class_files, load_command, _("\
3742 Dynamically load FILE into the running program, and record its symbols\n\
3743 for access from GDB.\n\
3744 A load OFFSET may also be given."), &cmdlist);
3745 set_cmd_completer (c, filename_completer);
3747 add_prefix_cmd ("overlay", class_support, overlay_command,
3748 _("Commands for debugging overlays."), &overlaylist,
3749 "overlay ", 0, &cmdlist);
3751 add_com_alias ("ovly", "overlay", class_alias, 1);
3752 add_com_alias ("ov", "overlay", class_alias, 1);
3754 add_cmd ("map-overlay", class_support, map_overlay_command,
3755 _("Assert that an overlay section is mapped."), &overlaylist);
3757 add_cmd ("unmap-overlay", class_support, unmap_overlay_command,
3758 _("Assert that an overlay section is unmapped."), &overlaylist);
3760 add_cmd ("list-overlays", class_support, list_overlays_command,
3761 _("List mappings of overlay sections."), &overlaylist);
3763 add_cmd ("manual", class_support, overlay_manual_command,
3764 _("Enable overlay debugging."), &overlaylist);
3765 add_cmd ("off", class_support, overlay_off_command,
3766 _("Disable overlay debugging."), &overlaylist);
3767 add_cmd ("auto", class_support, overlay_auto_command,
3768 _("Enable automatic overlay debugging."), &overlaylist);
3769 add_cmd ("load-target", class_support, overlay_load_command,
3770 _("Read the overlay mapping state from the target."), &overlaylist);
3772 /* Filename extension to source language lookup table: */
3773 init_filename_language_table ();
3774 add_setshow_string_noescape_cmd ("extension-language", class_files,
3776 Set mapping between filename extension and source language."), _("\
3777 Show mapping between filename extension and source language."), _("\
3778 Usage: set extension-language .foo bar"),
3779 set_ext_lang_command,
3781 &setlist, &showlist);
3783 add_info ("extensions", info_ext_lang_command,
3784 _("All filename extensions associated with a source language."));
3786 add_setshow_optional_filename_cmd ("debug-file-directory", class_support,
3787 &debug_file_directory, _("\
3788 Set the directories where separate debug symbols are searched for."), _("\
3789 Show the directories where separate debug symbols are searched for."), _("\
3790 Separate debug symbols are first searched for in the same\n\
3791 directory as the binary, then in the `" DEBUG_SUBDIRECTORY "' subdirectory,\n\
3792 and lastly at the path of the directory of the binary with\n\
3793 each global debug-file-directory component prepended."),
3795 show_debug_file_directory,
3796 &setlist, &showlist);