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 (objfile->gdbarch,
891 /* Remove any ISA markers, so that this matches entries in the
893 objfile->ei.entry_point
894 = gdbarch_addr_bits_remove (objfile->gdbarch, 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 const char *filename;
1617 filename = find_main_filename ();
1618 if (filename != NULL)
1619 lang = deduce_language_from_filename (filename);
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, 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, exename,
1691 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);
2220 /* The second argument is always the text address at which
2221 to load the program. */
2222 sect_opts[section_index].name = ".text";
2223 sect_opts[section_index].value = arg;
2224 if (++section_index >= num_sect_opts)
2227 sect_opts = ((struct sect_opt *)
2228 xrealloc (sect_opts,
2230 * sizeof (struct sect_opt)));
2235 /* It's an option (starting with '-') or it's an argument
2240 if (strcmp (arg, "-readnow") == 0)
2241 flags |= OBJF_READNOW;
2242 else if (strcmp (arg, "-s") == 0)
2244 expecting_sec_name = 1;
2245 expecting_sec_addr = 1;
2250 if (expecting_sec_name)
2252 sect_opts[section_index].name = arg;
2253 expecting_sec_name = 0;
2256 if (expecting_sec_addr)
2258 sect_opts[section_index].value = arg;
2259 expecting_sec_addr = 0;
2260 if (++section_index >= num_sect_opts)
2263 sect_opts = ((struct sect_opt *)
2264 xrealloc (sect_opts,
2266 * sizeof (struct sect_opt)));
2270 error (_("USAGE: add-symbol-file <filename> <textaddress>"
2271 " [-readnow] [-s <secname> <addr>]*"));
2276 /* This command takes at least two arguments. The first one is a
2277 filename, and the second is the address where this file has been
2278 loaded. Abort now if this address hasn't been provided by the
2280 if (section_index < 1)
2281 error (_("The address where %s has been loaded is missing"), filename);
2283 /* Print the prompt for the query below. And save the arguments into
2284 a sect_addr_info structure to be passed around to other
2285 functions. We have to split this up into separate print
2286 statements because hex_string returns a local static
2289 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename);
2290 section_addrs = alloc_section_addr_info (section_index);
2291 make_cleanup (xfree, section_addrs);
2292 for (i = 0; i < section_index; i++)
2295 char *val = sect_opts[i].value;
2296 char *sec = sect_opts[i].name;
2298 addr = parse_and_eval_address (val);
2300 /* Here we store the section offsets in the order they were
2301 entered on the command line. */
2302 section_addrs->other[sec_num].name = sec;
2303 section_addrs->other[sec_num].addr = addr;
2304 printf_unfiltered ("\t%s_addr = %s\n", sec,
2305 paddress (gdbarch, addr));
2308 /* The object's sections are initialized when a
2309 call is made to build_objfile_section_table (objfile).
2310 This happens in reread_symbols.
2311 At this point, we don't know what file type this is,
2312 so we can't determine what section names are valid. */
2314 section_addrs->num_sections = sec_num;
2316 if (from_tty && (!query ("%s", "")))
2317 error (_("Not confirmed."));
2319 symbol_file_add (filename, from_tty ? SYMFILE_VERBOSE : 0,
2320 section_addrs, flags);
2322 /* Getting new symbols may change our opinion about what is
2324 reinit_frame_cache ();
2325 do_cleanups (my_cleanups);
2329 typedef struct objfile *objfilep;
2331 DEF_VEC_P (objfilep);
2333 /* Re-read symbols if a symbol-file has changed. */
2336 reread_symbols (void)
2338 struct objfile *objfile;
2340 struct stat new_statbuf;
2342 VEC (objfilep) *new_objfiles = NULL;
2343 struct cleanup *all_cleanups;
2345 all_cleanups = make_cleanup (VEC_cleanup (objfilep), &new_objfiles);
2347 /* With the addition of shared libraries, this should be modified,
2348 the load time should be saved in the partial symbol tables, since
2349 different tables may come from different source files. FIXME.
2350 This routine should then walk down each partial symbol table
2351 and see if the symbol table that it originates from has been changed. */
2353 for (objfile = object_files; objfile; objfile = objfile->next)
2355 /* solib-sunos.c creates one objfile with obfd. */
2356 if (objfile->obfd == NULL)
2359 /* Separate debug objfiles are handled in the main objfile. */
2360 if (objfile->separate_debug_objfile_backlink)
2363 /* If this object is from an archive (what you usually create with
2364 `ar', often called a `static library' on most systems, though
2365 a `shared library' on AIX is also an archive), then you should
2366 stat on the archive name, not member name. */
2367 if (objfile->obfd->my_archive)
2368 res = stat (objfile->obfd->my_archive->filename, &new_statbuf);
2370 res = stat (objfile->name, &new_statbuf);
2373 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2374 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2378 new_modtime = new_statbuf.st_mtime;
2379 if (new_modtime != objfile->mtime)
2381 struct cleanup *old_cleanups;
2382 struct section_offsets *offsets;
2384 char *obfd_filename;
2386 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2389 /* There are various functions like symbol_file_add,
2390 symfile_bfd_open, syms_from_objfile, etc., which might
2391 appear to do what we want. But they have various other
2392 effects which we *don't* want. So we just do stuff
2393 ourselves. We don't worry about mapped files (for one thing,
2394 any mapped file will be out of date). */
2396 /* If we get an error, blow away this objfile (not sure if
2397 that is the correct response for things like shared
2399 old_cleanups = make_cleanup_free_objfile (objfile);
2400 /* We need to do this whenever any symbols go away. */
2401 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
2403 if (exec_bfd != NULL
2404 && filename_cmp (bfd_get_filename (objfile->obfd),
2405 bfd_get_filename (exec_bfd)) == 0)
2407 /* Reload EXEC_BFD without asking anything. */
2409 exec_file_attach (bfd_get_filename (objfile->obfd), 0);
2412 /* Keep the calls order approx. the same as in free_objfile. */
2414 /* Free the separate debug objfiles. It will be
2415 automatically recreated by sym_read. */
2416 free_objfile_separate_debug (objfile);
2418 /* Remove any references to this objfile in the global
2420 preserve_values (objfile);
2422 /* Nuke all the state that we will re-read. Much of the following
2423 code which sets things to NULL really is necessary to tell
2424 other parts of GDB that there is nothing currently there.
2426 Try to keep the freeing order compatible with free_objfile. */
2428 if (objfile->sf != NULL)
2430 (*objfile->sf->sym_finish) (objfile);
2433 clear_objfile_data (objfile);
2435 /* Clean up any state BFD has sitting around. */
2437 struct bfd *obfd = objfile->obfd;
2439 obfd_filename = bfd_get_filename (objfile->obfd);
2440 /* Open the new BFD before freeing the old one, so that
2441 the filename remains live. */
2442 objfile->obfd = gdb_bfd_open_maybe_remote (obfd_filename);
2443 if (objfile->obfd == NULL)
2445 /* We have to make a cleanup and error here, rather
2446 than erroring later, because once we unref OBFD,
2447 OBFD_FILENAME will be freed. */
2448 make_cleanup_bfd_unref (obfd);
2449 error (_("Can't open %s to read symbols."), obfd_filename);
2451 gdb_bfd_unref (obfd);
2454 objfile->name = bfd_get_filename (objfile->obfd);
2455 /* bfd_openr sets cacheable to true, which is what we want. */
2456 if (!bfd_check_format (objfile->obfd, bfd_object))
2457 error (_("Can't read symbols from %s: %s."), objfile->name,
2458 bfd_errmsg (bfd_get_error ()));
2460 /* Save the offsets, we will nuke them with the rest of the
2462 num_offsets = objfile->num_sections;
2463 offsets = ((struct section_offsets *)
2464 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets)));
2465 memcpy (offsets, objfile->section_offsets,
2466 SIZEOF_N_SECTION_OFFSETS (num_offsets));
2468 /* FIXME: Do we have to free a whole linked list, or is this
2470 if (objfile->global_psymbols.list)
2471 xfree (objfile->global_psymbols.list);
2472 memset (&objfile->global_psymbols, 0,
2473 sizeof (objfile->global_psymbols));
2474 if (objfile->static_psymbols.list)
2475 xfree (objfile->static_psymbols.list);
2476 memset (&objfile->static_psymbols, 0,
2477 sizeof (objfile->static_psymbols));
2479 /* Free the obstacks for non-reusable objfiles. */
2480 psymbol_bcache_free (objfile->psymbol_cache);
2481 objfile->psymbol_cache = psymbol_bcache_init ();
2482 if (objfile->demangled_names_hash != NULL)
2484 htab_delete (objfile->demangled_names_hash);
2485 objfile->demangled_names_hash = NULL;
2487 obstack_free (&objfile->objfile_obstack, 0);
2488 objfile->sections = NULL;
2489 objfile->symtabs = NULL;
2490 objfile->psymtabs = NULL;
2491 objfile->psymtabs_addrmap = NULL;
2492 objfile->free_psymtabs = NULL;
2493 objfile->template_symbols = NULL;
2494 objfile->msymbols = NULL;
2495 objfile->minimal_symbol_count = 0;
2496 memset (&objfile->msymbol_hash, 0,
2497 sizeof (objfile->msymbol_hash));
2498 memset (&objfile->msymbol_demangled_hash, 0,
2499 sizeof (objfile->msymbol_demangled_hash));
2501 set_objfile_per_bfd (objfile);
2503 /* obstack_init also initializes the obstack so it is
2504 empty. We could use obstack_specify_allocation but
2505 gdb_obstack.h specifies the alloc/dealloc functions. */
2506 obstack_init (&objfile->objfile_obstack);
2507 build_objfile_section_table (objfile);
2508 terminate_minimal_symbol_table (objfile);
2510 /* We use the same section offsets as from last time. I'm not
2511 sure whether that is always correct for shared libraries. */
2512 objfile->section_offsets = (struct section_offsets *)
2513 obstack_alloc (&objfile->objfile_obstack,
2514 SIZEOF_N_SECTION_OFFSETS (num_offsets));
2515 memcpy (objfile->section_offsets, offsets,
2516 SIZEOF_N_SECTION_OFFSETS (num_offsets));
2517 objfile->num_sections = num_offsets;
2519 /* What the hell is sym_new_init for, anyway? The concept of
2520 distinguishing between the main file and additional files
2521 in this way seems rather dubious. */
2522 if (objfile == symfile_objfile)
2524 (*objfile->sf->sym_new_init) (objfile);
2527 (*objfile->sf->sym_init) (objfile);
2528 clear_complaints (&symfile_complaints, 1, 1);
2530 objfile->flags &= ~OBJF_PSYMTABS_READ;
2531 read_symbols (objfile, 0);
2533 if (!objfile_has_symbols (objfile))
2536 printf_unfiltered (_("(no debugging symbols found)\n"));
2540 /* We're done reading the symbol file; finish off complaints. */
2541 clear_complaints (&symfile_complaints, 0, 1);
2543 /* Getting new symbols may change our opinion about what is
2546 reinit_frame_cache ();
2548 /* Discard cleanups as symbol reading was successful. */
2549 discard_cleanups (old_cleanups);
2551 /* If the mtime has changed between the time we set new_modtime
2552 and now, we *want* this to be out of date, so don't call stat
2554 objfile->mtime = new_modtime;
2555 init_entry_point_info (objfile);
2557 VEC_safe_push (objfilep, new_objfiles, objfile);
2565 /* Notify objfiles that we've modified objfile sections. */
2566 objfiles_changed ();
2568 clear_symtab_users (0);
2570 /* clear_objfile_data for each objfile was called before freeing it and
2571 observer_notify_new_objfile (NULL) has been called by
2572 clear_symtab_users above. Notify the new files now. */
2573 for (ix = 0; VEC_iterate (objfilep, new_objfiles, ix, objfile); ix++)
2574 observer_notify_new_objfile (objfile);
2576 /* At least one objfile has changed, so we can consider that
2577 the executable we're debugging has changed too. */
2578 observer_notify_executable_changed ();
2581 do_cleanups (all_cleanups);
2592 static filename_language *filename_language_table;
2593 static int fl_table_size, fl_table_next;
2596 add_filename_language (char *ext, enum language lang)
2598 if (fl_table_next >= fl_table_size)
2600 fl_table_size += 10;
2601 filename_language_table =
2602 xrealloc (filename_language_table,
2603 fl_table_size * sizeof (*filename_language_table));
2606 filename_language_table[fl_table_next].ext = xstrdup (ext);
2607 filename_language_table[fl_table_next].lang = lang;
2611 static char *ext_args;
2613 show_ext_args (struct ui_file *file, int from_tty,
2614 struct cmd_list_element *c, const char *value)
2616 fprintf_filtered (file,
2617 _("Mapping between filename extension "
2618 "and source language is \"%s\".\n"),
2623 set_ext_lang_command (char *args, int from_tty, struct cmd_list_element *e)
2626 char *cp = ext_args;
2629 /* First arg is filename extension, starting with '.' */
2631 error (_("'%s': Filename extension must begin with '.'"), ext_args);
2633 /* Find end of first arg. */
2634 while (*cp && !isspace (*cp))
2638 error (_("'%s': two arguments required -- "
2639 "filename extension and language"),
2642 /* Null-terminate first arg. */
2645 /* Find beginning of second arg, which should be a source language. */
2646 cp = skip_spaces (cp);
2649 error (_("'%s': two arguments required -- "
2650 "filename extension and language"),
2653 /* Lookup the language from among those we know. */
2654 lang = language_enum (cp);
2656 /* Now lookup the filename extension: do we already know it? */
2657 for (i = 0; i < fl_table_next; i++)
2658 if (0 == strcmp (ext_args, filename_language_table[i].ext))
2661 if (i >= fl_table_next)
2663 /* New file extension. */
2664 add_filename_language (ext_args, lang);
2668 /* Redefining a previously known filename extension. */
2671 /* query ("Really make files of type %s '%s'?", */
2672 /* ext_args, language_str (lang)); */
2674 xfree (filename_language_table[i].ext);
2675 filename_language_table[i].ext = xstrdup (ext_args);
2676 filename_language_table[i].lang = lang;
2681 info_ext_lang_command (char *args, int from_tty)
2685 printf_filtered (_("Filename extensions and the languages they represent:"));
2686 printf_filtered ("\n\n");
2687 for (i = 0; i < fl_table_next; i++)
2688 printf_filtered ("\t%s\t- %s\n",
2689 filename_language_table[i].ext,
2690 language_str (filename_language_table[i].lang));
2694 init_filename_language_table (void)
2696 if (fl_table_size == 0) /* Protect against repetition. */
2700 filename_language_table =
2701 xmalloc (fl_table_size * sizeof (*filename_language_table));
2702 add_filename_language (".c", language_c);
2703 add_filename_language (".d", language_d);
2704 add_filename_language (".C", language_cplus);
2705 add_filename_language (".cc", language_cplus);
2706 add_filename_language (".cp", language_cplus);
2707 add_filename_language (".cpp", language_cplus);
2708 add_filename_language (".cxx", language_cplus);
2709 add_filename_language (".c++", language_cplus);
2710 add_filename_language (".java", language_java);
2711 add_filename_language (".class", language_java);
2712 add_filename_language (".m", language_objc);
2713 add_filename_language (".f", language_fortran);
2714 add_filename_language (".F", language_fortran);
2715 add_filename_language (".for", language_fortran);
2716 add_filename_language (".FOR", language_fortran);
2717 add_filename_language (".ftn", language_fortran);
2718 add_filename_language (".FTN", language_fortran);
2719 add_filename_language (".fpp", language_fortran);
2720 add_filename_language (".FPP", language_fortran);
2721 add_filename_language (".f90", language_fortran);
2722 add_filename_language (".F90", language_fortran);
2723 add_filename_language (".f95", language_fortran);
2724 add_filename_language (".F95", language_fortran);
2725 add_filename_language (".f03", language_fortran);
2726 add_filename_language (".F03", language_fortran);
2727 add_filename_language (".f08", language_fortran);
2728 add_filename_language (".F08", language_fortran);
2729 add_filename_language (".s", language_asm);
2730 add_filename_language (".sx", language_asm);
2731 add_filename_language (".S", language_asm);
2732 add_filename_language (".pas", language_pascal);
2733 add_filename_language (".p", language_pascal);
2734 add_filename_language (".pp", language_pascal);
2735 add_filename_language (".adb", language_ada);
2736 add_filename_language (".ads", language_ada);
2737 add_filename_language (".a", language_ada);
2738 add_filename_language (".ada", language_ada);
2739 add_filename_language (".dg", language_ada);
2744 deduce_language_from_filename (const char *filename)
2749 if (filename != NULL)
2750 if ((cp = strrchr (filename, '.')) != NULL)
2751 for (i = 0; i < fl_table_next; i++)
2752 if (strcmp (cp, filename_language_table[i].ext) == 0)
2753 return filename_language_table[i].lang;
2755 return language_unknown;
2760 Allocate and partly initialize a new symbol table. Return a pointer
2761 to it. error() if no space.
2763 Caller must set these fields:
2772 allocate_symtab (const char *filename, struct objfile *objfile)
2774 struct symtab *symtab;
2776 symtab = (struct symtab *)
2777 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symtab));
2778 memset (symtab, 0, sizeof (*symtab));
2779 symtab->filename = (char *) bcache (filename, strlen (filename) + 1,
2780 objfile->per_bfd->filename_cache);
2781 symtab->fullname = NULL;
2782 symtab->language = deduce_language_from_filename (filename);
2783 symtab->debugformat = "unknown";
2785 /* Hook it to the objfile it comes from. */
2787 symtab->objfile = objfile;
2788 symtab->next = objfile->symtabs;
2789 objfile->symtabs = symtab;
2791 if (symtab_create_debug)
2793 /* Be a bit clever with debugging messages, and don't print objfile
2794 every time, only when it changes. */
2795 static char *last_objfile_name = NULL;
2797 if (last_objfile_name == NULL
2798 || strcmp (last_objfile_name, objfile->name) != 0)
2800 xfree (last_objfile_name);
2801 last_objfile_name = xstrdup (objfile->name);
2802 fprintf_unfiltered (gdb_stdlog,
2803 "Creating one or more symtabs for objfile %s ...\n",
2806 fprintf_unfiltered (gdb_stdlog,
2807 "Created symtab %s for module %s.\n",
2808 host_address_to_string (symtab), filename);
2815 /* Reset all data structures in gdb which may contain references to symbol
2816 table data. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
2819 clear_symtab_users (int add_flags)
2821 /* Someday, we should do better than this, by only blowing away
2822 the things that really need to be blown. */
2824 /* Clear the "current" symtab first, because it is no longer valid.
2825 breakpoint_re_set may try to access the current symtab. */
2826 clear_current_source_symtab_and_line ();
2829 if ((add_flags & SYMFILE_DEFER_BP_RESET) == 0)
2830 breakpoint_re_set ();
2831 clear_last_displayed_sal ();
2832 clear_pc_function_cache ();
2833 observer_notify_new_objfile (NULL);
2835 /* Clear globals which might have pointed into a removed objfile.
2836 FIXME: It's not clear which of these are supposed to persist
2837 between expressions and which ought to be reset each time. */
2838 expression_context_block = NULL;
2839 innermost_block = NULL;
2841 /* Varobj may refer to old symbols, perform a cleanup. */
2842 varobj_invalidate ();
2847 clear_symtab_users_cleanup (void *ignore)
2849 clear_symtab_users (0);
2853 The following code implements an abstraction for debugging overlay sections.
2855 The target model is as follows:
2856 1) The gnu linker will permit multiple sections to be mapped into the
2857 same VMA, each with its own unique LMA (or load address).
2858 2) It is assumed that some runtime mechanism exists for mapping the
2859 sections, one by one, from the load address into the VMA address.
2860 3) This code provides a mechanism for gdb to keep track of which
2861 sections should be considered to be mapped from the VMA to the LMA.
2862 This information is used for symbol lookup, and memory read/write.
2863 For instance, if a section has been mapped then its contents
2864 should be read from the VMA, otherwise from the LMA.
2866 Two levels of debugger support for overlays are available. One is
2867 "manual", in which the debugger relies on the user to tell it which
2868 overlays are currently mapped. This level of support is
2869 implemented entirely in the core debugger, and the information about
2870 whether a section is mapped is kept in the objfile->obj_section table.
2872 The second level of support is "automatic", and is only available if
2873 the target-specific code provides functionality to read the target's
2874 overlay mapping table, and translate its contents for the debugger
2875 (by updating the mapped state information in the obj_section tables).
2877 The interface is as follows:
2879 overlay map <name> -- tell gdb to consider this section mapped
2880 overlay unmap <name> -- tell gdb to consider this section unmapped
2881 overlay list -- list the sections that GDB thinks are mapped
2882 overlay read-target -- get the target's state of what's mapped
2883 overlay off/manual/auto -- set overlay debugging state
2884 Functional interface:
2885 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2886 section, return that section.
2887 find_pc_overlay(pc): find any overlay section that contains
2888 the pc, either in its VMA or its LMA
2889 section_is_mapped(sect): true if overlay is marked as mapped
2890 section_is_overlay(sect): true if section's VMA != LMA
2891 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2892 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2893 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2894 overlay_mapped_address(...): map an address from section's LMA to VMA
2895 overlay_unmapped_address(...): map an address from section's VMA to LMA
2896 symbol_overlayed_address(...): Return a "current" address for symbol:
2897 either in VMA or LMA depending on whether
2898 the symbol's section is currently mapped. */
2900 /* Overlay debugging state: */
2902 enum overlay_debugging_state overlay_debugging = ovly_off;
2903 int overlay_cache_invalid = 0; /* True if need to refresh mapped state. */
2905 /* Function: section_is_overlay (SECTION)
2906 Returns true if SECTION has VMA not equal to LMA, ie.
2907 SECTION is loaded at an address different from where it will "run". */
2910 section_is_overlay (struct obj_section *section)
2912 if (overlay_debugging && section)
2914 bfd *abfd = section->objfile->obfd;
2915 asection *bfd_section = section->the_bfd_section;
2917 if (bfd_section_lma (abfd, bfd_section) != 0
2918 && bfd_section_lma (abfd, bfd_section)
2919 != bfd_section_vma (abfd, bfd_section))
2926 /* Function: overlay_invalidate_all (void)
2927 Invalidate the mapped state of all overlay sections (mark it as stale). */
2930 overlay_invalidate_all (void)
2932 struct objfile *objfile;
2933 struct obj_section *sect;
2935 ALL_OBJSECTIONS (objfile, sect)
2936 if (section_is_overlay (sect))
2937 sect->ovly_mapped = -1;
2940 /* Function: section_is_mapped (SECTION)
2941 Returns true if section is an overlay, and is currently mapped.
2943 Access to the ovly_mapped flag is restricted to this function, so
2944 that we can do automatic update. If the global flag
2945 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2946 overlay_invalidate_all. If the mapped state of the particular
2947 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2950 section_is_mapped (struct obj_section *osect)
2952 struct gdbarch *gdbarch;
2954 if (osect == 0 || !section_is_overlay (osect))
2957 switch (overlay_debugging)
2961 return 0; /* overlay debugging off */
2962 case ovly_auto: /* overlay debugging automatic */
2963 /* Unles there is a gdbarch_overlay_update function,
2964 there's really nothing useful to do here (can't really go auto). */
2965 gdbarch = get_objfile_arch (osect->objfile);
2966 if (gdbarch_overlay_update_p (gdbarch))
2968 if (overlay_cache_invalid)
2970 overlay_invalidate_all ();
2971 overlay_cache_invalid = 0;
2973 if (osect->ovly_mapped == -1)
2974 gdbarch_overlay_update (gdbarch, osect);
2976 /* fall thru to manual case */
2977 case ovly_on: /* overlay debugging manual */
2978 return osect->ovly_mapped == 1;
2982 /* Function: pc_in_unmapped_range
2983 If PC falls into the lma range of SECTION, return true, else false. */
2986 pc_in_unmapped_range (CORE_ADDR pc, struct obj_section *section)
2988 if (section_is_overlay (section))
2990 bfd *abfd = section->objfile->obfd;
2991 asection *bfd_section = section->the_bfd_section;
2993 /* We assume the LMA is relocated by the same offset as the VMA. */
2994 bfd_vma size = bfd_get_section_size (bfd_section);
2995 CORE_ADDR offset = obj_section_offset (section);
2997 if (bfd_get_section_lma (abfd, bfd_section) + offset <= pc
2998 && pc < bfd_get_section_lma (abfd, bfd_section) + offset + size)
3005 /* Function: pc_in_mapped_range
3006 If PC falls into the vma range of SECTION, return true, else false. */
3009 pc_in_mapped_range (CORE_ADDR pc, struct obj_section *section)
3011 if (section_is_overlay (section))
3013 if (obj_section_addr (section) <= pc
3014 && pc < obj_section_endaddr (section))
3021 /* Return true if the mapped ranges of sections A and B overlap, false
3025 sections_overlap (struct obj_section *a, struct obj_section *b)
3027 CORE_ADDR a_start = obj_section_addr (a);
3028 CORE_ADDR a_end = obj_section_endaddr (a);
3029 CORE_ADDR b_start = obj_section_addr (b);
3030 CORE_ADDR b_end = obj_section_endaddr (b);
3032 return (a_start < b_end && b_start < a_end);
3035 /* Function: overlay_unmapped_address (PC, SECTION)
3036 Returns the address corresponding to PC in the unmapped (load) range.
3037 May be the same as PC. */
3040 overlay_unmapped_address (CORE_ADDR pc, struct obj_section *section)
3042 if (section_is_overlay (section) && pc_in_mapped_range (pc, section))
3044 bfd *abfd = section->objfile->obfd;
3045 asection *bfd_section = section->the_bfd_section;
3047 return pc + bfd_section_lma (abfd, bfd_section)
3048 - bfd_section_vma (abfd, bfd_section);
3054 /* Function: overlay_mapped_address (PC, SECTION)
3055 Returns the address corresponding to PC in the mapped (runtime) range.
3056 May be the same as PC. */
3059 overlay_mapped_address (CORE_ADDR pc, struct obj_section *section)
3061 if (section_is_overlay (section) && pc_in_unmapped_range (pc, section))
3063 bfd *abfd = section->objfile->obfd;
3064 asection *bfd_section = section->the_bfd_section;
3066 return pc + bfd_section_vma (abfd, bfd_section)
3067 - bfd_section_lma (abfd, bfd_section);
3073 /* Function: symbol_overlayed_address
3074 Return one of two addresses (relative to the VMA or to the LMA),
3075 depending on whether the section is mapped or not. */
3078 symbol_overlayed_address (CORE_ADDR address, struct obj_section *section)
3080 if (overlay_debugging)
3082 /* If the symbol has no section, just return its regular address. */
3085 /* If the symbol's section is not an overlay, just return its
3087 if (!section_is_overlay (section))
3089 /* If the symbol's section is mapped, just return its address. */
3090 if (section_is_mapped (section))
3093 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3094 * then return its LOADED address rather than its vma address!!
3096 return overlay_unmapped_address (address, section);
3101 /* Function: find_pc_overlay (PC)
3102 Return the best-match overlay section for PC:
3103 If PC matches a mapped overlay section's VMA, return that section.
3104 Else if PC matches an unmapped section's VMA, return that section.
3105 Else if PC matches an unmapped section's LMA, return that section. */
3107 struct obj_section *
3108 find_pc_overlay (CORE_ADDR pc)
3110 struct objfile *objfile;
3111 struct obj_section *osect, *best_match = NULL;
3113 if (overlay_debugging)
3114 ALL_OBJSECTIONS (objfile, osect)
3115 if (section_is_overlay (osect))
3117 if (pc_in_mapped_range (pc, osect))
3119 if (section_is_mapped (osect))
3124 else if (pc_in_unmapped_range (pc, osect))
3130 /* Function: find_pc_mapped_section (PC)
3131 If PC falls into the VMA address range of an overlay section that is
3132 currently marked as MAPPED, return that section. Else return NULL. */
3134 struct obj_section *
3135 find_pc_mapped_section (CORE_ADDR pc)
3137 struct objfile *objfile;
3138 struct obj_section *osect;
3140 if (overlay_debugging)
3141 ALL_OBJSECTIONS (objfile, osect)
3142 if (pc_in_mapped_range (pc, osect) && section_is_mapped (osect))
3148 /* Function: list_overlays_command
3149 Print a list of mapped sections and their PC ranges. */
3152 list_overlays_command (char *args, int from_tty)
3155 struct objfile *objfile;
3156 struct obj_section *osect;
3158 if (overlay_debugging)
3159 ALL_OBJSECTIONS (objfile, osect)
3160 if (section_is_mapped (osect))
3162 struct gdbarch *gdbarch = get_objfile_arch (objfile);
3167 vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section);
3168 lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section);
3169 size = bfd_get_section_size (osect->the_bfd_section);
3170 name = bfd_section_name (objfile->obfd, osect->the_bfd_section);
3172 printf_filtered ("Section %s, loaded at ", name);
3173 fputs_filtered (paddress (gdbarch, lma), gdb_stdout);
3174 puts_filtered (" - ");
3175 fputs_filtered (paddress (gdbarch, lma + size), gdb_stdout);
3176 printf_filtered (", mapped at ");
3177 fputs_filtered (paddress (gdbarch, vma), gdb_stdout);
3178 puts_filtered (" - ");
3179 fputs_filtered (paddress (gdbarch, vma + size), gdb_stdout);
3180 puts_filtered ("\n");
3185 printf_filtered (_("No sections are mapped.\n"));
3188 /* Function: map_overlay_command
3189 Mark the named section as mapped (ie. residing at its VMA address). */
3192 map_overlay_command (char *args, int from_tty)
3194 struct objfile *objfile, *objfile2;
3195 struct obj_section *sec, *sec2;
3197 if (!overlay_debugging)
3198 error (_("Overlay debugging not enabled. Use "
3199 "either the 'overlay auto' or\n"
3200 "the 'overlay manual' command."));
3202 if (args == 0 || *args == 0)
3203 error (_("Argument required: name of an overlay section"));
3205 /* First, find a section matching the user supplied argument. */
3206 ALL_OBJSECTIONS (objfile, sec)
3207 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
3209 /* Now, check to see if the section is an overlay. */
3210 if (!section_is_overlay (sec))
3211 continue; /* not an overlay section */
3213 /* Mark the overlay as "mapped". */
3214 sec->ovly_mapped = 1;
3216 /* Next, make a pass and unmap any sections that are
3217 overlapped by this new section: */
3218 ALL_OBJSECTIONS (objfile2, sec2)
3219 if (sec2->ovly_mapped && sec != sec2 && sections_overlap (sec, sec2))
3222 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3223 bfd_section_name (objfile->obfd,
3224 sec2->the_bfd_section));
3225 sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2. */
3229 error (_("No overlay section called %s"), args);
3232 /* Function: unmap_overlay_command
3233 Mark the overlay section as unmapped
3234 (ie. resident in its LMA address range, rather than the VMA range). */
3237 unmap_overlay_command (char *args, int from_tty)
3239 struct objfile *objfile;
3240 struct obj_section *sec;
3242 if (!overlay_debugging)
3243 error (_("Overlay debugging not enabled. "
3244 "Use either the 'overlay auto' or\n"
3245 "the 'overlay manual' command."));
3247 if (args == 0 || *args == 0)
3248 error (_("Argument required: name of an overlay section"));
3250 /* First, find a section matching the user supplied argument. */
3251 ALL_OBJSECTIONS (objfile, sec)
3252 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
3254 if (!sec->ovly_mapped)
3255 error (_("Section %s is not mapped"), args);
3256 sec->ovly_mapped = 0;
3259 error (_("No overlay section called %s"), args);
3262 /* Function: overlay_auto_command
3263 A utility command to turn on overlay debugging.
3264 Possibly this should be done via a set/show command. */
3267 overlay_auto_command (char *args, int from_tty)
3269 overlay_debugging = ovly_auto;
3270 enable_overlay_breakpoints ();
3272 printf_unfiltered (_("Automatic overlay debugging enabled."));
3275 /* Function: overlay_manual_command
3276 A utility command to turn on overlay debugging.
3277 Possibly this should be done via a set/show command. */
3280 overlay_manual_command (char *args, int from_tty)
3282 overlay_debugging = ovly_on;
3283 disable_overlay_breakpoints ();
3285 printf_unfiltered (_("Overlay debugging enabled."));
3288 /* Function: overlay_off_command
3289 A utility command to turn on overlay debugging.
3290 Possibly this should be done via a set/show command. */
3293 overlay_off_command (char *args, int from_tty)
3295 overlay_debugging = ovly_off;
3296 disable_overlay_breakpoints ();
3298 printf_unfiltered (_("Overlay debugging disabled."));
3302 overlay_load_command (char *args, int from_tty)
3304 struct gdbarch *gdbarch = get_current_arch ();
3306 if (gdbarch_overlay_update_p (gdbarch))
3307 gdbarch_overlay_update (gdbarch, NULL);
3309 error (_("This target does not know how to read its overlay state."));
3312 /* Function: overlay_command
3313 A place-holder for a mis-typed command. */
3315 /* Command list chain containing all defined "overlay" subcommands. */
3316 static struct cmd_list_element *overlaylist;
3319 overlay_command (char *args, int from_tty)
3322 ("\"overlay\" must be followed by the name of an overlay command.\n");
3323 help_list (overlaylist, "overlay ", -1, gdb_stdout);
3326 /* Target Overlays for the "Simplest" overlay manager:
3328 This is GDB's default target overlay layer. It works with the
3329 minimal overlay manager supplied as an example by Cygnus. The
3330 entry point is via a function pointer "gdbarch_overlay_update",
3331 so targets that use a different runtime overlay manager can
3332 substitute their own overlay_update function and take over the
3335 The overlay_update function pokes around in the target's data structures
3336 to see what overlays are mapped, and updates GDB's overlay mapping with
3339 In this simple implementation, the target data structures are as follows:
3340 unsigned _novlys; /# number of overlay sections #/
3341 unsigned _ovly_table[_novlys][4] = {
3342 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3343 {..., ..., ..., ...},
3345 unsigned _novly_regions; /# number of overlay regions #/
3346 unsigned _ovly_region_table[_novly_regions][3] = {
3347 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3350 These functions will attempt to update GDB's mappedness state in the
3351 symbol section table, based on the target's mappedness state.
3353 To do this, we keep a cached copy of the target's _ovly_table, and
3354 attempt to detect when the cached copy is invalidated. The main
3355 entry point is "simple_overlay_update(SECT), which looks up SECT in
3356 the cached table and re-reads only the entry for that section from
3357 the target (whenever possible). */
3359 /* Cached, dynamically allocated copies of the target data structures: */
3360 static unsigned (*cache_ovly_table)[4] = 0;
3361 static unsigned cache_novlys = 0;
3362 static CORE_ADDR cache_ovly_table_base = 0;
3365 VMA, SIZE, LMA, MAPPED
3368 /* Throw away the cached copy of _ovly_table. */
3371 simple_free_overlay_table (void)
3373 if (cache_ovly_table)
3374 xfree (cache_ovly_table);
3376 cache_ovly_table = NULL;
3377 cache_ovly_table_base = 0;
3380 /* Read an array of ints of size SIZE from the target into a local buffer.
3381 Convert to host order. int LEN is number of ints. */
3384 read_target_long_array (CORE_ADDR memaddr, unsigned int *myaddr,
3385 int len, int size, enum bfd_endian byte_order)
3387 /* FIXME (alloca): Not safe if array is very large. */
3388 gdb_byte *buf = alloca (len * size);
3391 read_memory (memaddr, buf, len * size);
3392 for (i = 0; i < len; i++)
3393 myaddr[i] = extract_unsigned_integer (size * i + buf, size, byte_order);
3396 /* Find and grab a copy of the target _ovly_table
3397 (and _novlys, which is needed for the table's size). */
3400 simple_read_overlay_table (void)
3402 struct minimal_symbol *novlys_msym;
3403 struct bound_minimal_symbol ovly_table_msym;
3404 struct gdbarch *gdbarch;
3406 enum bfd_endian byte_order;
3408 simple_free_overlay_table ();
3409 novlys_msym = lookup_minimal_symbol ("_novlys", NULL, NULL);
3412 error (_("Error reading inferior's overlay table: "
3413 "couldn't find `_novlys' variable\n"
3414 "in inferior. Use `overlay manual' mode."));
3418 ovly_table_msym = lookup_bound_minimal_symbol ("_ovly_table");
3419 if (! ovly_table_msym.minsym)
3421 error (_("Error reading inferior's overlay table: couldn't find "
3422 "`_ovly_table' array\n"
3423 "in inferior. Use `overlay manual' mode."));
3427 gdbarch = get_objfile_arch (ovly_table_msym.objfile);
3428 word_size = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT;
3429 byte_order = gdbarch_byte_order (gdbarch);
3431 cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym),
3434 = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table));
3435 cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (ovly_table_msym.minsym);
3436 read_target_long_array (cache_ovly_table_base,
3437 (unsigned int *) cache_ovly_table,
3438 cache_novlys * 4, word_size, byte_order);
3440 return 1; /* SUCCESS */
3443 /* Function: simple_overlay_update_1
3444 A helper function for simple_overlay_update. Assuming a cached copy
3445 of _ovly_table exists, look through it to find an entry whose vma,
3446 lma and size match those of OSECT. Re-read the entry and make sure
3447 it still matches OSECT (else the table may no longer be valid).
3448 Set OSECT's mapped state to match the entry. Return: 1 for
3449 success, 0 for failure. */
3452 simple_overlay_update_1 (struct obj_section *osect)
3455 bfd *obfd = osect->objfile->obfd;
3456 asection *bsect = osect->the_bfd_section;
3457 struct gdbarch *gdbarch = get_objfile_arch (osect->objfile);
3458 int word_size = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT;
3459 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3461 size = bfd_get_section_size (osect->the_bfd_section);
3462 for (i = 0; i < cache_novlys; i++)
3463 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3464 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3465 /* && cache_ovly_table[i][SIZE] == size */ )
3467 read_target_long_array (cache_ovly_table_base + i * word_size,
3468 (unsigned int *) cache_ovly_table[i],
3469 4, word_size, byte_order);
3470 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3471 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3472 /* && cache_ovly_table[i][SIZE] == size */ )
3474 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3477 else /* Warning! Warning! Target's ovly table has changed! */
3483 /* Function: simple_overlay_update
3484 If OSECT is NULL, then update all sections' mapped state
3485 (after re-reading the entire target _ovly_table).
3486 If OSECT is non-NULL, then try to find a matching entry in the
3487 cached ovly_table and update only OSECT's mapped state.
3488 If a cached entry can't be found or the cache isn't valid, then
3489 re-read the entire cache, and go ahead and update all sections. */
3492 simple_overlay_update (struct obj_section *osect)
3494 struct objfile *objfile;
3496 /* Were we given an osect to look up? NULL means do all of them. */
3498 /* Have we got a cached copy of the target's overlay table? */
3499 if (cache_ovly_table != NULL)
3501 /* Does its cached location match what's currently in the
3503 struct minimal_symbol *minsym
3504 = lookup_minimal_symbol ("_ovly_table", NULL, NULL);
3507 error (_("Error reading inferior's overlay table: couldn't "
3508 "find `_ovly_table' array\n"
3509 "in inferior. Use `overlay manual' mode."));
3511 if (cache_ovly_table_base == SYMBOL_VALUE_ADDRESS (minsym))
3512 /* Then go ahead and try to look up this single section in
3514 if (simple_overlay_update_1 (osect))
3515 /* Found it! We're done. */
3519 /* Cached table no good: need to read the entire table anew.
3520 Or else we want all the sections, in which case it's actually
3521 more efficient to read the whole table in one block anyway. */
3523 if (! simple_read_overlay_table ())
3526 /* Now may as well update all sections, even if only one was requested. */
3527 ALL_OBJSECTIONS (objfile, osect)
3528 if (section_is_overlay (osect))
3531 bfd *obfd = osect->objfile->obfd;
3532 asection *bsect = osect->the_bfd_section;
3534 size = bfd_get_section_size (bsect);
3535 for (i = 0; i < cache_novlys; i++)
3536 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3537 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3538 /* && cache_ovly_table[i][SIZE] == size */ )
3539 { /* obj_section matches i'th entry in ovly_table. */
3540 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3541 break; /* finished with inner for loop: break out. */
3546 /* Set the output sections and output offsets for section SECTP in
3547 ABFD. The relocation code in BFD will read these offsets, so we
3548 need to be sure they're initialized. We map each section to itself,
3549 with no offset; this means that SECTP->vma will be honored. */
3552 symfile_dummy_outputs (bfd *abfd, asection *sectp, void *dummy)
3554 sectp->output_section = sectp;
3555 sectp->output_offset = 0;
3558 /* Default implementation for sym_relocate. */
3561 default_symfile_relocate (struct objfile *objfile, asection *sectp,
3564 /* Use sectp->owner instead of objfile->obfd. sectp may point to a
3566 bfd *abfd = sectp->owner;
3568 /* We're only interested in sections with relocation
3570 if ((sectp->flags & SEC_RELOC) == 0)
3573 /* We will handle section offsets properly elsewhere, so relocate as if
3574 all sections begin at 0. */
3575 bfd_map_over_sections (abfd, symfile_dummy_outputs, NULL);
3577 return bfd_simple_get_relocated_section_contents (abfd, sectp, buf, NULL);
3580 /* Relocate the contents of a debug section SECTP in ABFD. The
3581 contents are stored in BUF if it is non-NULL, or returned in a
3582 malloc'd buffer otherwise.
3584 For some platforms and debug info formats, shared libraries contain
3585 relocations against the debug sections (particularly for DWARF-2;
3586 one affected platform is PowerPC GNU/Linux, although it depends on
3587 the version of the linker in use). Also, ELF object files naturally
3588 have unresolved relocations for their debug sections. We need to apply
3589 the relocations in order to get the locations of symbols correct.
3590 Another example that may require relocation processing, is the
3591 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3595 symfile_relocate_debug_section (struct objfile *objfile,
3596 asection *sectp, bfd_byte *buf)
3598 gdb_assert (objfile->sf->sym_relocate);
3600 return (*objfile->sf->sym_relocate) (objfile, sectp, buf);
3603 struct symfile_segment_data *
3604 get_symfile_segment_data (bfd *abfd)
3606 const struct sym_fns *sf = find_sym_fns (abfd);
3611 return sf->sym_segments (abfd);
3615 free_symfile_segment_data (struct symfile_segment_data *data)
3617 xfree (data->segment_bases);
3618 xfree (data->segment_sizes);
3619 xfree (data->segment_info);
3624 - DATA, containing segment addresses from the object file ABFD, and
3625 the mapping from ABFD's sections onto the segments that own them,
3627 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3628 segment addresses reported by the target,
3629 store the appropriate offsets for each section in OFFSETS.
3631 If there are fewer entries in SEGMENT_BASES than there are segments
3632 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3634 If there are more entries, then ignore the extra. The target may
3635 not be able to distinguish between an empty data segment and a
3636 missing data segment; a missing text segment is less plausible. */
3639 symfile_map_offsets_to_segments (bfd *abfd,
3640 const struct symfile_segment_data *data,
3641 struct section_offsets *offsets,
3642 int num_segment_bases,
3643 const CORE_ADDR *segment_bases)
3648 /* It doesn't make sense to call this function unless you have some
3649 segment base addresses. */
3650 gdb_assert (num_segment_bases > 0);
3652 /* If we do not have segment mappings for the object file, we
3653 can not relocate it by segments. */
3654 gdb_assert (data != NULL);
3655 gdb_assert (data->num_segments > 0);
3657 for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next)
3659 int which = data->segment_info[i];
3661 gdb_assert (0 <= which && which <= data->num_segments);
3663 /* Don't bother computing offsets for sections that aren't
3664 loaded as part of any segment. */
3668 /* Use the last SEGMENT_BASES entry as the address of any extra
3669 segments mentioned in DATA->segment_info. */
3670 if (which > num_segment_bases)
3671 which = num_segment_bases;
3673 offsets->offsets[i] = (segment_bases[which - 1]
3674 - data->segment_bases[which - 1]);
3681 symfile_find_segment_sections (struct objfile *objfile)
3683 bfd *abfd = objfile->obfd;
3686 struct symfile_segment_data *data;
3688 data = get_symfile_segment_data (objfile->obfd);
3692 if (data->num_segments != 1 && data->num_segments != 2)
3694 free_symfile_segment_data (data);
3698 for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next)
3700 int which = data->segment_info[i];
3704 if (objfile->sect_index_text == -1)
3705 objfile->sect_index_text = sect->index;
3707 if (objfile->sect_index_rodata == -1)
3708 objfile->sect_index_rodata = sect->index;
3710 else if (which == 2)
3712 if (objfile->sect_index_data == -1)
3713 objfile->sect_index_data = sect->index;
3715 if (objfile->sect_index_bss == -1)
3716 objfile->sect_index_bss = sect->index;
3720 free_symfile_segment_data (data);
3724 _initialize_symfile (void)
3726 struct cmd_list_element *c;
3728 c = add_cmd ("symbol-file", class_files, symbol_file_command, _("\
3729 Load symbol table from executable file FILE.\n\
3730 The `file' command can also load symbol tables, as well as setting the file\n\
3731 to execute."), &cmdlist);
3732 set_cmd_completer (c, filename_completer);
3734 c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command, _("\
3735 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3736 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR>\
3737 ...]\nADDR is the starting address of the file's text.\n\
3738 The optional arguments are section-name section-address pairs and\n\
3739 should be specified if the data and bss segments are not contiguous\n\
3740 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3742 set_cmd_completer (c, filename_completer);
3744 c = add_cmd ("load", class_files, load_command, _("\
3745 Dynamically load FILE into the running program, and record its symbols\n\
3746 for access from GDB.\n\
3747 A load OFFSET may also be given."), &cmdlist);
3748 set_cmd_completer (c, filename_completer);
3750 add_prefix_cmd ("overlay", class_support, overlay_command,
3751 _("Commands for debugging overlays."), &overlaylist,
3752 "overlay ", 0, &cmdlist);
3754 add_com_alias ("ovly", "overlay", class_alias, 1);
3755 add_com_alias ("ov", "overlay", class_alias, 1);
3757 add_cmd ("map-overlay", class_support, map_overlay_command,
3758 _("Assert that an overlay section is mapped."), &overlaylist);
3760 add_cmd ("unmap-overlay", class_support, unmap_overlay_command,
3761 _("Assert that an overlay section is unmapped."), &overlaylist);
3763 add_cmd ("list-overlays", class_support, list_overlays_command,
3764 _("List mappings of overlay sections."), &overlaylist);
3766 add_cmd ("manual", class_support, overlay_manual_command,
3767 _("Enable overlay debugging."), &overlaylist);
3768 add_cmd ("off", class_support, overlay_off_command,
3769 _("Disable overlay debugging."), &overlaylist);
3770 add_cmd ("auto", class_support, overlay_auto_command,
3771 _("Enable automatic overlay debugging."), &overlaylist);
3772 add_cmd ("load-target", class_support, overlay_load_command,
3773 _("Read the overlay mapping state from the target."), &overlaylist);
3775 /* Filename extension to source language lookup table: */
3776 init_filename_language_table ();
3777 add_setshow_string_noescape_cmd ("extension-language", class_files,
3779 Set mapping between filename extension and source language."), _("\
3780 Show mapping between filename extension and source language."), _("\
3781 Usage: set extension-language .foo bar"),
3782 set_ext_lang_command,
3784 &setlist, &showlist);
3786 add_info ("extensions", info_ext_lang_command,
3787 _("All filename extensions associated with a source language."));
3789 add_setshow_optional_filename_cmd ("debug-file-directory", class_support,
3790 &debug_file_directory, _("\
3791 Set the directories where separate debug symbols are searched for."), _("\
3792 Show the directories where separate debug symbols are searched for."), _("\
3793 Separate debug symbols are first searched for in the same\n\
3794 directory as the binary, then in the `" DEBUG_SUBDIRECTORY "' subdirectory,\n\
3795 and lastly at the path of the directory of the binary with\n\
3796 each global debug-file-directory component prepended."),
3798 show_debug_file_directory,
3799 &setlist, &showlist);