1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
5 Free Software Foundation, Inc.
7 Contributed by Cygnus Support, using pieces from other GDB modules.
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>. */
36 #include "breakpoint.h"
38 #include "complaints.h"
40 #include "inferior.h" /* for write_pc */
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"
56 #include <sys/types.h>
58 #include "gdb_string.h"
65 int (*deprecated_ui_load_progress_hook) (const char *section, unsigned long num);
66 void (*deprecated_show_load_progress) (const char *section,
67 unsigned long section_sent,
68 unsigned long section_size,
69 unsigned long total_sent,
70 unsigned long total_size);
71 void (*deprecated_pre_add_symbol_hook) (const char *);
72 void (*deprecated_post_add_symbol_hook) (void);
74 static void clear_symtab_users_cleanup (void *ignore);
76 /* Global variables owned by this file */
77 int readnow_symbol_files; /* Read full symbols immediately */
79 /* External variables and functions referenced. */
81 extern void report_transfer_performance (unsigned long, time_t, time_t);
83 /* Functions this file defines */
86 static int simple_read_overlay_region_table (void);
87 static void simple_free_overlay_region_table (void);
90 static void set_initial_language (void);
92 static void load_command (char *, int);
94 static void symbol_file_add_main_1 (char *args, int from_tty, int flags);
96 static void add_symbol_file_command (char *, int);
98 static void add_shared_symbol_files_command (char *, int);
100 static void reread_separate_symbols (struct objfile *objfile);
102 static void cashier_psymtab (struct partial_symtab *);
104 bfd *symfile_bfd_open (char *);
106 int get_section_index (struct objfile *, char *);
108 static struct sym_fns *find_sym_fns (bfd *);
110 static void decrement_reading_symtab (void *);
112 static void overlay_invalidate_all (void);
114 static int overlay_is_mapped (struct obj_section *);
116 void list_overlays_command (char *, int);
118 void map_overlay_command (char *, int);
120 void unmap_overlay_command (char *, int);
122 static void overlay_auto_command (char *, int);
124 static void overlay_manual_command (char *, int);
126 static void overlay_off_command (char *, int);
128 static void overlay_load_command (char *, int);
130 static void overlay_command (char *, int);
132 static void simple_free_overlay_table (void);
134 static void read_target_long_array (CORE_ADDR, unsigned int *, int);
136 static int simple_read_overlay_table (void);
138 static int simple_overlay_update_1 (struct obj_section *);
140 static void add_filename_language (char *ext, enum language lang);
142 static void info_ext_lang_command (char *args, int from_tty);
144 static char *find_separate_debug_file (struct objfile *objfile);
146 static void init_filename_language_table (void);
148 static void symfile_find_segment_sections (struct objfile *objfile);
150 void _initialize_symfile (void);
152 /* List of all available sym_fns. On gdb startup, each object file reader
153 calls add_symtab_fns() to register information on each format it is
156 static struct sym_fns *symtab_fns = NULL;
158 /* Flag for whether user will be reloading symbols multiple times.
159 Defaults to ON for VxWorks, otherwise OFF. */
161 #ifdef SYMBOL_RELOADING_DEFAULT
162 int symbol_reloading = SYMBOL_RELOADING_DEFAULT;
164 int symbol_reloading = 0;
167 show_symbol_reloading (struct ui_file *file, int from_tty,
168 struct cmd_list_element *c, const char *value)
170 fprintf_filtered (file, _("\
171 Dynamic symbol table reloading multiple times in one run is %s.\n"),
176 /* If non-zero, shared library symbols will be added automatically
177 when the inferior is created, new libraries are loaded, or when
178 attaching to the inferior. This is almost always what users will
179 want to have happen; but for very large programs, the startup time
180 will be excessive, and so if this is a problem, the user can clear
181 this flag and then add the shared library symbols as needed. Note
182 that there is a potential for confusion, since if the shared
183 library symbols are not loaded, commands like "info fun" will *not*
184 report all the functions that are actually present. */
186 int auto_solib_add = 1;
188 /* For systems that support it, a threshold size in megabytes. If
189 automatically adding a new library's symbol table to those already
190 known to the debugger would cause the total shared library symbol
191 size to exceed this threshhold, then the shlib's symbols are not
192 added. The threshold is ignored if the user explicitly asks for a
193 shlib to be added, such as when using the "sharedlibrary"
196 int auto_solib_limit;
199 /* This compares two partial symbols by names, using strcmp_iw_ordered
200 for the comparison. */
203 compare_psymbols (const void *s1p, const void *s2p)
205 struct partial_symbol *const *s1 = s1p;
206 struct partial_symbol *const *s2 = s2p;
208 return strcmp_iw_ordered (SYMBOL_SEARCH_NAME (*s1),
209 SYMBOL_SEARCH_NAME (*s2));
213 sort_pst_symbols (struct partial_symtab *pst)
215 /* Sort the global list; don't sort the static list */
217 qsort (pst->objfile->global_psymbols.list + pst->globals_offset,
218 pst->n_global_syms, sizeof (struct partial_symbol *),
222 /* Make a null terminated copy of the string at PTR with SIZE characters in
223 the obstack pointed to by OBSTACKP . Returns the address of the copy.
224 Note that the string at PTR does not have to be null terminated, I.E. it
225 may be part of a larger string and we are only saving a substring. */
228 obsavestring (const char *ptr, int size, struct obstack *obstackp)
230 char *p = (char *) obstack_alloc (obstackp, size + 1);
231 /* Open-coded memcpy--saves function call time. These strings are usually
232 short. FIXME: Is this really still true with a compiler that can
235 const char *p1 = ptr;
237 const char *end = ptr + size;
245 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
246 in the obstack pointed to by OBSTACKP. */
249 obconcat (struct obstack *obstackp, const char *s1, const char *s2,
252 int len = strlen (s1) + strlen (s2) + strlen (s3) + 1;
253 char *val = (char *) obstack_alloc (obstackp, len);
260 /* True if we are nested inside psymtab_to_symtab. */
262 int currently_reading_symtab = 0;
265 decrement_reading_symtab (void *dummy)
267 currently_reading_symtab--;
270 /* Get the symbol table that corresponds to a partial_symtab.
271 This is fast after the first time you do it. In fact, there
272 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
276 psymtab_to_symtab (struct partial_symtab *pst)
278 /* If it's been looked up before, return it. */
282 /* If it has not yet been read in, read it. */
285 struct cleanup *back_to = make_cleanup (decrement_reading_symtab, NULL);
286 currently_reading_symtab++;
287 (*pst->read_symtab) (pst);
288 do_cleanups (back_to);
294 /* Remember the lowest-addressed loadable section we've seen.
295 This function is called via bfd_map_over_sections.
297 In case of equal vmas, the section with the largest size becomes the
298 lowest-addressed loadable section.
300 If the vmas and sizes are equal, the last section is considered the
301 lowest-addressed loadable section. */
304 find_lowest_section (bfd *abfd, asection *sect, void *obj)
306 asection **lowest = (asection **) obj;
308 if (0 == (bfd_get_section_flags (abfd, sect) & SEC_LOAD))
311 *lowest = sect; /* First loadable section */
312 else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect))
313 *lowest = sect; /* A lower loadable section */
314 else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect)
315 && (bfd_section_size (abfd, (*lowest))
316 <= bfd_section_size (abfd, sect)))
320 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
322 struct section_addr_info *
323 alloc_section_addr_info (size_t num_sections)
325 struct section_addr_info *sap;
328 size = (sizeof (struct section_addr_info)
329 + sizeof (struct other_sections) * (num_sections - 1));
330 sap = (struct section_addr_info *) xmalloc (size);
331 memset (sap, 0, size);
332 sap->num_sections = num_sections;
338 /* Return a freshly allocated copy of ADDRS. The section names, if
339 any, are also freshly allocated copies of those in ADDRS. */
340 struct section_addr_info *
341 copy_section_addr_info (struct section_addr_info *addrs)
343 struct section_addr_info *copy
344 = alloc_section_addr_info (addrs->num_sections);
347 copy->num_sections = addrs->num_sections;
348 for (i = 0; i < addrs->num_sections; i++)
350 copy->other[i].addr = addrs->other[i].addr;
351 if (addrs->other[i].name)
352 copy->other[i].name = xstrdup (addrs->other[i].name);
354 copy->other[i].name = NULL;
355 copy->other[i].sectindex = addrs->other[i].sectindex;
363 /* Build (allocate and populate) a section_addr_info struct from
364 an existing section table. */
366 extern struct section_addr_info *
367 build_section_addr_info_from_section_table (const struct section_table *start,
368 const struct section_table *end)
370 struct section_addr_info *sap;
371 const struct section_table *stp;
374 sap = alloc_section_addr_info (end - start);
376 for (stp = start, oidx = 0; stp != end; stp++)
378 if (bfd_get_section_flags (stp->bfd,
379 stp->the_bfd_section) & (SEC_ALLOC | SEC_LOAD)
380 && oidx < end - start)
382 sap->other[oidx].addr = stp->addr;
383 sap->other[oidx].name
384 = xstrdup (bfd_section_name (stp->bfd, stp->the_bfd_section));
385 sap->other[oidx].sectindex = stp->the_bfd_section->index;
394 /* Free all memory allocated by build_section_addr_info_from_section_table. */
397 free_section_addr_info (struct section_addr_info *sap)
401 for (idx = 0; idx < sap->num_sections; idx++)
402 if (sap->other[idx].name)
403 xfree (sap->other[idx].name);
408 /* Initialize OBJFILE's sect_index_* members. */
410 init_objfile_sect_indices (struct objfile *objfile)
415 sect = bfd_get_section_by_name (objfile->obfd, ".text");
417 objfile->sect_index_text = sect->index;
419 sect = bfd_get_section_by_name (objfile->obfd, ".data");
421 objfile->sect_index_data = sect->index;
423 sect = bfd_get_section_by_name (objfile->obfd, ".bss");
425 objfile->sect_index_bss = sect->index;
427 sect = bfd_get_section_by_name (objfile->obfd, ".rodata");
429 objfile->sect_index_rodata = sect->index;
431 /* This is where things get really weird... We MUST have valid
432 indices for the various sect_index_* members or gdb will abort.
433 So if for example, there is no ".text" section, we have to
434 accomodate that. First, check for a file with the standard
435 one or two segments. */
437 symfile_find_segment_sections (objfile);
439 /* Except when explicitly adding symbol files at some address,
440 section_offsets contains nothing but zeros, so it doesn't matter
441 which slot in section_offsets the individual sect_index_* members
442 index into. So if they are all zero, it is safe to just point
443 all the currently uninitialized indices to the first slot. But
444 beware: if this is the main executable, it may be relocated
445 later, e.g. by the remote qOffsets packet, and then this will
446 be wrong! That's why we try segments first. */
448 for (i = 0; i < objfile->num_sections; i++)
450 if (ANOFFSET (objfile->section_offsets, i) != 0)
455 if (i == objfile->num_sections)
457 if (objfile->sect_index_text == -1)
458 objfile->sect_index_text = 0;
459 if (objfile->sect_index_data == -1)
460 objfile->sect_index_data = 0;
461 if (objfile->sect_index_bss == -1)
462 objfile->sect_index_bss = 0;
463 if (objfile->sect_index_rodata == -1)
464 objfile->sect_index_rodata = 0;
468 /* The arguments to place_section. */
470 struct place_section_arg
472 struct section_offsets *offsets;
476 /* Find a unique offset to use for loadable section SECT if
477 the user did not provide an offset. */
480 place_section (bfd *abfd, asection *sect, void *obj)
482 struct place_section_arg *arg = obj;
483 CORE_ADDR *offsets = arg->offsets->offsets, start_addr;
485 ULONGEST align = ((ULONGEST) 1) << bfd_get_section_alignment (abfd, sect);
487 /* We are only interested in allocated sections. */
488 if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0)
491 /* If the user specified an offset, honor it. */
492 if (offsets[sect->index] != 0)
495 /* Otherwise, let's try to find a place for the section. */
496 start_addr = (arg->lowest + align - 1) & -align;
503 for (cur_sec = abfd->sections; cur_sec != NULL; cur_sec = cur_sec->next)
505 int indx = cur_sec->index;
506 CORE_ADDR cur_offset;
508 /* We don't need to compare against ourself. */
512 /* We can only conflict with allocated sections. */
513 if ((bfd_get_section_flags (abfd, cur_sec) & SEC_ALLOC) == 0)
516 /* If the section offset is 0, either the section has not been placed
517 yet, or it was the lowest section placed (in which case LOWEST
518 will be past its end). */
519 if (offsets[indx] == 0)
522 /* If this section would overlap us, then we must move up. */
523 if (start_addr + bfd_get_section_size (sect) > offsets[indx]
524 && start_addr < offsets[indx] + bfd_get_section_size (cur_sec))
526 start_addr = offsets[indx] + bfd_get_section_size (cur_sec);
527 start_addr = (start_addr + align - 1) & -align;
532 /* Otherwise, we appear to be OK. So far. */
537 offsets[sect->index] = start_addr;
538 arg->lowest = start_addr + bfd_get_section_size (sect);
540 exec_set_section_address (bfd_get_filename (abfd), sect->index, start_addr);
543 /* Parse the user's idea of an offset for dynamic linking, into our idea
544 of how to represent it for fast symbol reading. This is the default
545 version of the sym_fns.sym_offsets function for symbol readers that
546 don't need to do anything special. It allocates a section_offsets table
547 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
550 default_symfile_offsets (struct objfile *objfile,
551 struct section_addr_info *addrs)
555 objfile->num_sections = bfd_count_sections (objfile->obfd);
556 objfile->section_offsets = (struct section_offsets *)
557 obstack_alloc (&objfile->objfile_obstack,
558 SIZEOF_N_SECTION_OFFSETS (objfile->num_sections));
559 memset (objfile->section_offsets, 0,
560 SIZEOF_N_SECTION_OFFSETS (objfile->num_sections));
562 /* Now calculate offsets for section that were specified by the
564 for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++)
566 struct other_sections *osp ;
568 osp = &addrs->other[i] ;
572 /* Record all sections in offsets */
573 /* The section_offsets in the objfile are here filled in using
575 (objfile->section_offsets)->offsets[osp->sectindex] = osp->addr;
578 /* For relocatable files, all loadable sections will start at zero.
579 The zero is meaningless, so try to pick arbitrary addresses such
580 that no loadable sections overlap. This algorithm is quadratic,
581 but the number of sections in a single object file is generally
583 if ((bfd_get_file_flags (objfile->obfd) & (EXEC_P | DYNAMIC)) == 0)
585 struct place_section_arg arg;
586 bfd *abfd = objfile->obfd;
588 CORE_ADDR lowest = 0;
590 for (cur_sec = abfd->sections; cur_sec != NULL; cur_sec = cur_sec->next)
591 /* We do not expect this to happen; just skip this step if the
592 relocatable file has a section with an assigned VMA. */
593 if (bfd_section_vma (abfd, cur_sec) != 0)
598 CORE_ADDR *offsets = objfile->section_offsets->offsets;
600 /* Pick non-overlapping offsets for sections the user did not
602 arg.offsets = objfile->section_offsets;
604 bfd_map_over_sections (objfile->obfd, place_section, &arg);
606 /* Correctly filling in the section offsets is not quite
607 enough. Relocatable files have two properties that
608 (most) shared objects do not:
610 - Their debug information will contain relocations. Some
611 shared libraries do also, but many do not, so this can not
614 - If there are multiple code sections they will be loaded
615 at different relative addresses in memory than they are
616 in the objfile, since all sections in the file will start
619 Because GDB has very limited ability to map from an
620 address in debug info to the correct code section,
621 it relies on adding SECT_OFF_TEXT to things which might be
622 code. If we clear all the section offsets, and set the
623 section VMAs instead, then symfile_relocate_debug_section
624 will return meaningful debug information pointing at the
627 GDB has too many different data structures for section
628 addresses - a bfd, objfile, and so_list all have section
629 tables, as does exec_ops. Some of these could probably
632 for (cur_sec = abfd->sections; cur_sec != NULL;
633 cur_sec = cur_sec->next)
635 if ((bfd_get_section_flags (abfd, cur_sec) & SEC_ALLOC) == 0)
638 bfd_set_section_vma (abfd, cur_sec, offsets[cur_sec->index]);
639 offsets[cur_sec->index] = 0;
644 /* Remember the bfd indexes for the .text, .data, .bss and
646 init_objfile_sect_indices (objfile);
650 /* Divide the file into segments, which are individual relocatable units.
651 This is the default version of the sym_fns.sym_segments function for
652 symbol readers that do not have an explicit representation of segments.
653 It assumes that object files do not have segments, and fully linked
654 files have a single segment. */
656 struct symfile_segment_data *
657 default_symfile_segments (bfd *abfd)
661 struct symfile_segment_data *data;
664 /* Relocatable files contain enough information to position each
665 loadable section independently; they should not be relocated
667 if ((bfd_get_file_flags (abfd) & (EXEC_P | DYNAMIC)) == 0)
670 /* Make sure there is at least one loadable section in the file. */
671 for (sect = abfd->sections; sect != NULL; sect = sect->next)
673 if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0)
681 low = bfd_get_section_vma (abfd, sect);
682 high = low + bfd_get_section_size (sect);
684 data = XZALLOC (struct symfile_segment_data);
685 data->num_segments = 1;
686 data->segment_bases = XCALLOC (1, CORE_ADDR);
687 data->segment_sizes = XCALLOC (1, CORE_ADDR);
689 num_sections = bfd_count_sections (abfd);
690 data->segment_info = XCALLOC (num_sections, int);
692 for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next)
696 if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0)
699 vma = bfd_get_section_vma (abfd, sect);
702 if (vma + bfd_get_section_size (sect) > high)
703 high = vma + bfd_get_section_size (sect);
705 data->segment_info[i] = 1;
708 data->segment_bases[0] = low;
709 data->segment_sizes[0] = high - low;
714 /* Process a symbol file, as either the main file or as a dynamically
717 OBJFILE is where the symbols are to be read from.
719 ADDRS is the list of section load addresses. If the user has given
720 an 'add-symbol-file' command, then this is the list of offsets and
721 addresses he or she provided as arguments to the command; or, if
722 we're handling a shared library, these are the actual addresses the
723 sections are loaded at, according to the inferior's dynamic linker
724 (as gleaned by GDB's shared library code). We convert each address
725 into an offset from the section VMA's as it appears in the object
726 file, and then call the file's sym_offsets function to convert this
727 into a format-specific offset table --- a `struct section_offsets'.
728 If ADDRS is non-zero, OFFSETS must be zero.
730 OFFSETS is a table of section offsets already in the right
731 format-specific representation. NUM_OFFSETS is the number of
732 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
733 assume this is the proper table the call to sym_offsets described
734 above would produce. Instead of calling sym_offsets, we just dump
735 it right into objfile->section_offsets. (When we're re-reading
736 symbols from an objfile, we don't have the original load address
737 list any more; all we have is the section offset table.) If
738 OFFSETS is non-zero, ADDRS must be zero.
740 MAINLINE is nonzero if this is the main symbol file, or zero if
741 it's an extra symbol file such as dynamically loaded code.
743 VERBO is nonzero if the caller has printed a verbose message about
744 the symbol reading (and complaints can be more terse about it). */
747 syms_from_objfile (struct objfile *objfile,
748 struct section_addr_info *addrs,
749 struct section_offsets *offsets,
754 struct section_addr_info *local_addr = NULL;
755 struct cleanup *old_chain;
757 gdb_assert (! (addrs && offsets));
759 init_entry_point_info (objfile);
760 objfile->sf = find_sym_fns (objfile->obfd);
762 if (objfile->sf == NULL)
763 return; /* No symbols. */
765 /* Make sure that partially constructed symbol tables will be cleaned up
766 if an error occurs during symbol reading. */
767 old_chain = make_cleanup_free_objfile (objfile);
769 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
770 list. We now establish the convention that an addr of zero means
771 no load address was specified. */
772 if (! addrs && ! offsets)
775 = alloc_section_addr_info (bfd_count_sections (objfile->obfd));
776 make_cleanup (xfree, local_addr);
780 /* Now either addrs or offsets is non-zero. */
784 /* We will modify the main symbol table, make sure that all its users
785 will be cleaned up if an error occurs during symbol reading. */
786 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
788 /* Since no error yet, throw away the old symbol table. */
790 if (symfile_objfile != NULL)
792 free_objfile (symfile_objfile);
793 symfile_objfile = NULL;
796 /* Currently we keep symbols from the add-symbol-file command.
797 If the user wants to get rid of them, they should do "symbol-file"
798 without arguments first. Not sure this is the best behavior
801 (*objfile->sf->sym_new_init) (objfile);
804 /* Convert addr into an offset rather than an absolute address.
805 We find the lowest address of a loaded segment in the objfile,
806 and assume that <addr> is where that got loaded.
808 We no longer warn if the lowest section is not a text segment (as
809 happens for the PA64 port. */
810 if (!mainline && addrs && addrs->other[0].name)
812 asection *lower_sect;
814 CORE_ADDR lower_offset;
817 /* Find lowest loadable section to be used as starting point for
818 continguous sections. FIXME!! won't work without call to find
819 .text first, but this assumes text is lowest section. */
820 lower_sect = bfd_get_section_by_name (objfile->obfd, ".text");
821 if (lower_sect == NULL)
822 bfd_map_over_sections (objfile->obfd, find_lowest_section,
824 if (lower_sect == NULL)
825 warning (_("no loadable sections found in added symbol-file %s"),
828 if ((bfd_get_section_flags (objfile->obfd, lower_sect) & SEC_CODE) == 0)
829 warning (_("Lowest section in %s is %s at %s"),
831 bfd_section_name (objfile->obfd, lower_sect),
832 paddr (bfd_section_vma (objfile->obfd, lower_sect)));
833 if (lower_sect != NULL)
834 lower_offset = bfd_section_vma (objfile->obfd, lower_sect);
838 /* Calculate offsets for the loadable sections.
839 FIXME! Sections must be in order of increasing loadable section
840 so that contiguous sections can use the lower-offset!!!
842 Adjust offsets if the segments are not contiguous.
843 If the section is contiguous, its offset should be set to
844 the offset of the highest loadable section lower than it
845 (the loadable section directly below it in memory).
846 this_offset = lower_offset = lower_addr - lower_orig_addr */
848 for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++)
850 if (addrs->other[i].addr != 0)
852 sect = bfd_get_section_by_name (objfile->obfd,
853 addrs->other[i].name);
857 -= bfd_section_vma (objfile->obfd, sect);
858 lower_offset = addrs->other[i].addr;
859 /* This is the index used by BFD. */
860 addrs->other[i].sectindex = sect->index ;
864 warning (_("section %s not found in %s"),
865 addrs->other[i].name,
867 addrs->other[i].addr = 0;
871 addrs->other[i].addr = lower_offset;
875 /* Initialize symbol reading routines for this objfile, allow complaints to
876 appear for this new file, and record how verbose to be, then do the
877 initial symbol reading for this file. */
879 (*objfile->sf->sym_init) (objfile);
880 clear_complaints (&symfile_complaints, 1, verbo);
883 (*objfile->sf->sym_offsets) (objfile, addrs);
886 size_t size = SIZEOF_N_SECTION_OFFSETS (num_offsets);
888 /* Just copy in the offset table directly as given to us. */
889 objfile->num_sections = num_offsets;
890 objfile->section_offsets
891 = ((struct section_offsets *)
892 obstack_alloc (&objfile->objfile_obstack, size));
893 memcpy (objfile->section_offsets, offsets, size);
895 init_objfile_sect_indices (objfile);
898 #ifndef DEPRECATED_IBM6000_TARGET
899 /* This is a SVR4/SunOS specific hack, I think. In any event, it
900 screws RS/6000. sym_offsets should be doing this sort of thing,
901 because it knows the mapping between bfd sections and
903 /* This is a hack. As far as I can tell, section offsets are not
904 target dependent. They are all set to addr with a couple of
905 exceptions. The exceptions are sysvr4 shared libraries, whose
906 offsets are kept in solib structures anyway and rs6000 xcoff
907 which handles shared libraries in a completely unique way.
909 Section offsets are built similarly, except that they are built
910 by adding addr in all cases because there is no clear mapping
911 from section_offsets into actual sections. Note that solib.c
912 has a different algorithm for finding section offsets.
914 These should probably all be collapsed into some target
915 independent form of shared library support. FIXME. */
919 struct obj_section *s;
921 /* Map section offsets in "addr" back to the object's
922 sections by comparing the section names with bfd's
923 section names. Then adjust the section address by
924 the offset. */ /* for gdb/13815 */
926 ALL_OBJFILE_OSECTIONS (objfile, s)
928 CORE_ADDR s_addr = 0;
932 !s_addr && i < addrs->num_sections && addrs->other[i].name;
934 if (strcmp (bfd_section_name (s->objfile->obfd,
936 addrs->other[i].name) == 0)
937 s_addr = addrs->other[i].addr; /* end added for gdb/13815 */
939 s->addr -= s->offset;
941 s->endaddr -= s->offset;
942 s->endaddr += s_addr;
946 #endif /* not DEPRECATED_IBM6000_TARGET */
948 (*objfile->sf->sym_read) (objfile, mainline);
950 /* Don't allow char * to have a typename (else would get caddr_t).
951 Ditto void *. FIXME: Check whether this is now done by all the
952 symbol readers themselves (many of them now do), and if so remove
955 TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0;
956 TYPE_NAME (lookup_pointer_type (builtin_type_void)) = 0;
958 /* Mark the objfile has having had initial symbol read attempted. Note
959 that this does not mean we found any symbols... */
961 objfile->flags |= OBJF_SYMS;
963 /* Discard cleanups as symbol reading was successful. */
965 discard_cleanups (old_chain);
968 /* Perform required actions after either reading in the initial
969 symbols for a new objfile, or mapping in the symbols from a reusable
973 new_symfile_objfile (struct objfile *objfile, int mainline, int verbo)
976 /* If this is the main symbol file we have to clean up all users of the
977 old main symbol file. Otherwise it is sufficient to fixup all the
978 breakpoints that may have been redefined by this symbol file. */
981 /* OK, make it the "real" symbol file. */
982 symfile_objfile = objfile;
984 clear_symtab_users ();
988 breakpoint_re_set ();
991 /* We're done reading the symbol file; finish off complaints. */
992 clear_complaints (&symfile_complaints, 0, verbo);
995 /* Process a symbol file, as either the main file or as a dynamically
998 ABFD is a BFD already open on the file, as from symfile_bfd_open.
999 This BFD will be closed on error, and is always consumed by this function.
1001 FROM_TTY says how verbose to be.
1003 MAINLINE specifies whether this is the main symbol file, or whether
1004 it's an extra symbol file such as dynamically loaded code.
1006 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
1007 syms_from_objfile, above. ADDRS is ignored when MAINLINE is
1010 Upon success, returns a pointer to the objfile that was added.
1011 Upon failure, jumps back to command level (never returns). */
1012 static struct objfile *
1013 symbol_file_add_with_addrs_or_offsets (bfd *abfd, int from_tty,
1014 struct section_addr_info *addrs,
1015 struct section_offsets *offsets,
1017 int mainline, int flags)
1019 struct objfile *objfile;
1020 struct partial_symtab *psymtab;
1021 char *debugfile = NULL;
1022 struct section_addr_info *orig_addrs = NULL;
1023 struct cleanup *my_cleanups;
1024 const char *name = bfd_get_filename (abfd);
1026 my_cleanups = make_cleanup_bfd_close (abfd);
1028 /* Give user a chance to burp if we'd be
1029 interactively wiping out any existing symbols. */
1031 if ((have_full_symbols () || have_partial_symbols ())
1034 && !query ("Load new symbol table from \"%s\"? ", name))
1035 error (_("Not confirmed."));
1037 objfile = allocate_objfile (abfd, flags);
1038 discard_cleanups (my_cleanups);
1042 orig_addrs = copy_section_addr_info (addrs);
1043 make_cleanup_free_section_addr_info (orig_addrs);
1046 /* We either created a new mapped symbol table, mapped an existing
1047 symbol table file which has not had initial symbol reading
1048 performed, or need to read an unmapped symbol table. */
1049 if (from_tty || info_verbose)
1051 if (deprecated_pre_add_symbol_hook)
1052 deprecated_pre_add_symbol_hook (name);
1055 printf_unfiltered (_("Reading symbols from %s..."), name);
1057 gdb_flush (gdb_stdout);
1060 syms_from_objfile (objfile, addrs, offsets, num_offsets,
1061 mainline, from_tty);
1063 /* We now have at least a partial symbol table. Check to see if the
1064 user requested that all symbols be read on initial access via either
1065 the gdb startup command line or on a per symbol file basis. Expand
1066 all partial symbol tables for this objfile if so. */
1068 if ((flags & OBJF_READNOW) || readnow_symbol_files)
1070 if (from_tty || info_verbose)
1072 printf_unfiltered (_("expanding to full symbols..."));
1074 gdb_flush (gdb_stdout);
1077 for (psymtab = objfile->psymtabs;
1079 psymtab = psymtab->next)
1081 psymtab_to_symtab (psymtab);
1085 /* If the file has its own symbol tables it has no separate debug info.
1086 `.dynsym'/`.symtab' go to MSYMBOLS, `.debug_info' goes to SYMTABS/PSYMTABS.
1087 `.gnu_debuglink' may no longer be present with `.note.gnu.build-id'. */
1088 if (objfile->psymtabs == NULL)
1089 debugfile = find_separate_debug_file (objfile);
1094 objfile->separate_debug_objfile
1095 = symbol_file_add (debugfile, from_tty, orig_addrs, 0, flags);
1099 objfile->separate_debug_objfile
1100 = symbol_file_add (debugfile, from_tty, NULL, 0, flags);
1102 objfile->separate_debug_objfile->separate_debug_objfile_backlink
1105 /* Put the separate debug object before the normal one, this is so that
1106 usage of the ALL_OBJFILES_SAFE macro will stay safe. */
1107 put_objfile_before (objfile->separate_debug_objfile, objfile);
1112 if (!have_partial_symbols () && !have_full_symbols ())
1115 printf_filtered (_("(no debugging symbols found)"));
1116 if (from_tty || info_verbose)
1117 printf_filtered ("...");
1119 printf_filtered ("\n");
1123 if (from_tty || info_verbose)
1125 if (deprecated_post_add_symbol_hook)
1126 deprecated_post_add_symbol_hook ();
1129 printf_unfiltered (_("done.\n"));
1133 /* We print some messages regardless of whether 'from_tty ||
1134 info_verbose' is true, so make sure they go out at the right
1136 gdb_flush (gdb_stdout);
1138 do_cleanups (my_cleanups);
1140 if (objfile->sf == NULL)
1141 return objfile; /* No symbols. */
1143 new_symfile_objfile (objfile, mainline, from_tty);
1145 observer_notify_new_objfile (objfile);
1147 bfd_cache_close_all ();
1152 /* Process the symbol file ABFD, as either the main file or as a
1153 dynamically loaded file.
1155 See symbol_file_add_with_addrs_or_offsets's comments for
1158 symbol_file_add_from_bfd (bfd *abfd, int from_tty,
1159 struct section_addr_info *addrs,
1160 int mainline, int flags)
1162 return symbol_file_add_with_addrs_or_offsets (abfd,
1163 from_tty, addrs, 0, 0,
1168 /* Process a symbol file, as either the main file or as a dynamically
1169 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
1172 symbol_file_add (char *name, int from_tty, struct section_addr_info *addrs,
1173 int mainline, int flags)
1175 return symbol_file_add_from_bfd (symfile_bfd_open (name), from_tty,
1176 addrs, mainline, flags);
1180 /* Call symbol_file_add() with default values and update whatever is
1181 affected by the loading of a new main().
1182 Used when the file is supplied in the gdb command line
1183 and by some targets with special loading requirements.
1184 The auxiliary function, symbol_file_add_main_1(), has the flags
1185 argument for the switches that can only be specified in the symbol_file
1189 symbol_file_add_main (char *args, int from_tty)
1191 symbol_file_add_main_1 (args, from_tty, 0);
1195 symbol_file_add_main_1 (char *args, int from_tty, int flags)
1197 symbol_file_add (args, from_tty, NULL, 1, flags);
1199 /* Getting new symbols may change our opinion about
1200 what is frameless. */
1201 reinit_frame_cache ();
1203 set_initial_language ();
1207 symbol_file_clear (int from_tty)
1209 if ((have_full_symbols () || have_partial_symbols ())
1212 ? !query (_("Discard symbol table from `%s'? "),
1213 symfile_objfile->name)
1214 : !query (_("Discard symbol table? "))))
1215 error (_("Not confirmed."));
1216 free_all_objfiles ();
1218 /* solib descriptors may have handles to objfiles. Since their
1219 storage has just been released, we'd better wipe the solib
1220 descriptors as well.
1222 #if defined(SOLIB_RESTART)
1226 symfile_objfile = NULL;
1228 printf_unfiltered (_("No symbol file now.\n"));
1237 /* Locate NT_GNU_BUILD_ID from ABFD and return its content. */
1239 static struct build_id *
1240 build_id_bfd_get (bfd *abfd)
1242 struct build_id *retval;
1244 if (!bfd_check_format (abfd, bfd_object)
1245 || bfd_get_flavour (abfd) != bfd_target_elf_flavour
1246 || elf_tdata (abfd)->build_id == NULL)
1249 retval = xmalloc (sizeof *retval - 1 + elf_tdata (abfd)->build_id_size);
1250 retval->size = elf_tdata (abfd)->build_id_size;
1251 memcpy (retval->data, elf_tdata (abfd)->build_id, retval->size);
1256 /* Return if FILENAME has NT_GNU_BUILD_ID matching the CHECK value. */
1259 build_id_verify (const char *filename, struct build_id *check)
1262 struct build_id *found = NULL;
1265 /* We expect to be silent on the non-existing files. */
1266 abfd = bfd_openr (filename, gnutarget);
1270 found = build_id_bfd_get (abfd);
1273 warning (_("File \"%s\" has no build-id, file skipped"), filename);
1274 else if (found->size != check->size
1275 || memcmp (found->data, check->data, found->size) != 0)
1276 warning (_("File \"%s\" has a different build-id, file skipped"), filename);
1280 if (!bfd_close (abfd))
1281 warning (_("cannot close \"%s\": %s"), filename,
1282 bfd_errmsg (bfd_get_error ()));
1287 build_id_to_debug_filename (struct build_id *build_id)
1289 char *link, *s, *retval = NULL;
1290 gdb_byte *data = build_id->data;
1291 size_t size = build_id->size;
1293 /* DEBUG_FILE_DIRECTORY/.build-id/ab/cdef */
1294 link = xmalloc (strlen (debug_file_directory) + (sizeof "/.build-id/" - 1) + 1
1295 + 2 * size + (sizeof ".debug" - 1) + 1);
1296 s = link + sprintf (link, "%s/.build-id/", debug_file_directory);
1300 s += sprintf (s, "%02x", (unsigned) *data++);
1305 s += sprintf (s, "%02x", (unsigned) *data++);
1306 strcpy (s, ".debug");
1308 /* lrealpath() is expensive even for the usually non-existent files. */
1309 if (access (link, F_OK) == 0)
1310 retval = lrealpath (link);
1313 if (retval != NULL && !build_id_verify (retval, build_id))
1323 get_debug_link_info (struct objfile *objfile, unsigned long *crc32_out)
1326 bfd_size_type debuglink_size;
1327 unsigned long crc32;
1332 sect = bfd_get_section_by_name (objfile->obfd, ".gnu_debuglink");
1337 debuglink_size = bfd_section_size (objfile->obfd, sect);
1339 contents = xmalloc (debuglink_size);
1340 bfd_get_section_contents (objfile->obfd, sect, contents,
1341 (file_ptr)0, (bfd_size_type)debuglink_size);
1343 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1344 crc_offset = strlen (contents) + 1;
1345 crc_offset = (crc_offset + 3) & ~3;
1347 crc32 = bfd_get_32 (objfile->obfd, (bfd_byte *) (contents + crc_offset));
1354 separate_debug_file_exists (const char *name, unsigned long crc)
1356 unsigned long file_crc = 0;
1358 gdb_byte buffer[8*1024];
1361 fd = open (name, O_RDONLY | O_BINARY);
1365 while ((count = read (fd, buffer, sizeof (buffer))) > 0)
1366 file_crc = gnu_debuglink_crc32 (file_crc, buffer, count);
1370 return crc == file_crc;
1373 char *debug_file_directory = NULL;
1375 show_debug_file_directory (struct ui_file *file, int from_tty,
1376 struct cmd_list_element *c, const char *value)
1378 fprintf_filtered (file, _("\
1379 The directory where separate debug symbols are searched for is \"%s\".\n"),
1383 #if ! defined (DEBUG_SUBDIRECTORY)
1384 #define DEBUG_SUBDIRECTORY ".debug"
1388 find_separate_debug_file (struct objfile *objfile)
1396 bfd_size_type debuglink_size;
1397 unsigned long crc32;
1399 struct build_id *build_id;
1401 build_id = build_id_bfd_get (objfile->obfd);
1402 if (build_id != NULL)
1404 char *build_id_name;
1406 build_id_name = build_id_to_debug_filename (build_id);
1408 /* Prevent looping on a stripped .debug file. */
1409 if (build_id_name != NULL && strcmp (build_id_name, objfile->name) == 0)
1411 warning (_("\"%s\": separate debug info file has no debug info"),
1413 xfree (build_id_name);
1415 else if (build_id_name != NULL)
1416 return build_id_name;
1419 basename = get_debug_link_info (objfile, &crc32);
1421 if (basename == NULL)
1424 dir = xstrdup (objfile->name);
1426 /* Strip off the final filename part, leaving the directory name,
1427 followed by a slash. Objfile names should always be absolute and
1428 tilde-expanded, so there should always be a slash in there
1430 for (i = strlen(dir) - 1; i >= 0; i--)
1432 if (IS_DIR_SEPARATOR (dir[i]))
1435 gdb_assert (i >= 0 && IS_DIR_SEPARATOR (dir[i]));
1438 debugfile = alloca (strlen (debug_file_directory) + 1
1440 + strlen (DEBUG_SUBDIRECTORY)
1445 /* First try in the same directory as the original file. */
1446 strcpy (debugfile, dir);
1447 strcat (debugfile, basename);
1449 if (separate_debug_file_exists (debugfile, crc32))
1453 return xstrdup (debugfile);
1456 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1457 strcpy (debugfile, dir);
1458 strcat (debugfile, DEBUG_SUBDIRECTORY);
1459 strcat (debugfile, "/");
1460 strcat (debugfile, basename);
1462 if (separate_debug_file_exists (debugfile, crc32))
1466 return xstrdup (debugfile);
1469 /* Then try in the global debugfile directory. */
1470 strcpy (debugfile, debug_file_directory);
1471 strcat (debugfile, "/");
1472 strcat (debugfile, dir);
1473 strcat (debugfile, basename);
1475 if (separate_debug_file_exists (debugfile, crc32))
1479 return xstrdup (debugfile);
1482 /* If the file is in the sysroot, try using its base path in the
1483 global debugfile directory. */
1484 canon_name = lrealpath (dir);
1486 && strncmp (canon_name, gdb_sysroot, strlen (gdb_sysroot)) == 0
1487 && IS_DIR_SEPARATOR (canon_name[strlen (gdb_sysroot)]))
1489 strcpy (debugfile, debug_file_directory);
1490 strcat (debugfile, canon_name + strlen (gdb_sysroot));
1491 strcat (debugfile, "/");
1492 strcat (debugfile, basename);
1494 if (separate_debug_file_exists (debugfile, crc32))
1499 return xstrdup (debugfile);
1512 /* This is the symbol-file command. Read the file, analyze its
1513 symbols, and add a struct symtab to a symtab list. The syntax of
1514 the command is rather bizarre:
1516 1. The function buildargv implements various quoting conventions
1517 which are undocumented and have little or nothing in common with
1518 the way things are quoted (or not quoted) elsewhere in GDB.
1520 2. Options are used, which are not generally used in GDB (perhaps
1521 "set mapped on", "set readnow on" would be better)
1523 3. The order of options matters, which is contrary to GNU
1524 conventions (because it is confusing and inconvenient). */
1527 symbol_file_command (char *args, int from_tty)
1533 symbol_file_clear (from_tty);
1537 char **argv = buildargv (args);
1538 int flags = OBJF_USERLOADED;
1539 struct cleanup *cleanups;
1545 cleanups = make_cleanup_freeargv (argv);
1546 while (*argv != NULL)
1548 if (strcmp (*argv, "-readnow") == 0)
1549 flags |= OBJF_READNOW;
1550 else if (**argv == '-')
1551 error (_("unknown option `%s'"), *argv);
1554 symbol_file_add_main_1 (*argv, from_tty, flags);
1562 error (_("no symbol file name was specified"));
1564 do_cleanups (cleanups);
1568 /* Set the initial language.
1570 FIXME: A better solution would be to record the language in the
1571 psymtab when reading partial symbols, and then use it (if known) to
1572 set the language. This would be a win for formats that encode the
1573 language in an easily discoverable place, such as DWARF. For
1574 stabs, we can jump through hoops looking for specially named
1575 symbols or try to intuit the language from the specific type of
1576 stabs we find, but we can't do that until later when we read in
1580 set_initial_language (void)
1582 struct partial_symtab *pst;
1583 enum language lang = language_unknown;
1585 pst = find_main_psymtab ();
1588 if (pst->filename != NULL)
1589 lang = deduce_language_from_filename (pst->filename);
1591 if (lang == language_unknown)
1593 /* Make C the default language */
1597 set_language (lang);
1598 expected_language = current_language; /* Don't warn the user. */
1602 /* Open the file specified by NAME and hand it off to BFD for
1603 preliminary analysis. Return a newly initialized bfd *, which
1604 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1605 absolute). In case of trouble, error() is called. */
1608 symfile_bfd_open (char *name)
1612 char *absolute_name;
1614 name = tilde_expand (name); /* Returns 1st new malloc'd copy. */
1616 /* Look down path for it, allocate 2nd new malloc'd copy. */
1617 desc = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, name,
1618 O_RDONLY | O_BINARY, 0, &absolute_name);
1619 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1622 char *exename = alloca (strlen (name) + 5);
1623 strcat (strcpy (exename, name), ".exe");
1624 desc = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, exename,
1625 O_RDONLY | O_BINARY, 0, &absolute_name);
1630 make_cleanup (xfree, name);
1631 perror_with_name (name);
1634 /* Free 1st new malloc'd copy, but keep the 2nd malloc'd copy in
1635 bfd. It'll be freed in free_objfile(). */
1637 name = absolute_name;
1639 sym_bfd = bfd_fopen (name, gnutarget, FOPEN_RB, desc);
1643 make_cleanup (xfree, name);
1644 error (_("\"%s\": can't open to read symbols: %s."), name,
1645 bfd_errmsg (bfd_get_error ()));
1647 bfd_set_cacheable (sym_bfd, 1);
1649 if (!bfd_check_format (sym_bfd, bfd_object))
1651 /* FIXME: should be checking for errors from bfd_close (for one
1652 thing, on error it does not free all the storage associated
1654 bfd_close (sym_bfd); /* This also closes desc. */
1655 make_cleanup (xfree, name);
1656 error (_("\"%s\": can't read symbols: %s."), name,
1657 bfd_errmsg (bfd_get_error ()));
1663 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1664 the section was not found. */
1667 get_section_index (struct objfile *objfile, char *section_name)
1669 asection *sect = bfd_get_section_by_name (objfile->obfd, section_name);
1677 /* Link SF into the global symtab_fns list. Called on startup by the
1678 _initialize routine in each object file format reader, to register
1679 information about each format the the reader is prepared to
1683 add_symtab_fns (struct sym_fns *sf)
1685 sf->next = symtab_fns;
1689 /* Initialize OBJFILE to read symbols from its associated BFD. It
1690 either returns or calls error(). The result is an initialized
1691 struct sym_fns in the objfile structure, that contains cached
1692 information about the symbol file. */
1694 static struct sym_fns *
1695 find_sym_fns (bfd *abfd)
1698 enum bfd_flavour our_flavour = bfd_get_flavour (abfd);
1700 if (our_flavour == bfd_target_srec_flavour
1701 || our_flavour == bfd_target_ihex_flavour
1702 || our_flavour == bfd_target_tekhex_flavour)
1703 return NULL; /* No symbols. */
1705 for (sf = symtab_fns; sf != NULL; sf = sf->next)
1706 if (our_flavour == sf->sym_flavour)
1709 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1710 bfd_get_target (abfd));
1714 /* This function runs the load command of our current target. */
1717 load_command (char *arg, int from_tty)
1724 parg = arg = get_exec_file (1);
1726 /* Count how many \ " ' tab space there are in the name. */
1727 while ((parg = strpbrk (parg, "\\\"'\t ")))
1735 /* We need to quote this string so buildargv can pull it apart. */
1736 char *temp = xmalloc (strlen (arg) + count + 1 );
1740 make_cleanup (xfree, temp);
1743 while ((parg = strpbrk (parg, "\\\"'\t ")))
1745 strncpy (ptemp, prev, parg - prev);
1746 ptemp += parg - prev;
1750 strcpy (ptemp, prev);
1756 /* The user might be reloading because the binary has changed. Take
1757 this opportunity to check. */
1758 reopen_exec_file ();
1761 target_load (arg, from_tty);
1763 /* After re-loading the executable, we don't really know which
1764 overlays are mapped any more. */
1765 overlay_cache_invalid = 1;
1768 /* This version of "load" should be usable for any target. Currently
1769 it is just used for remote targets, not inftarg.c or core files,
1770 on the theory that only in that case is it useful.
1772 Avoiding xmodem and the like seems like a win (a) because we don't have
1773 to worry about finding it, and (b) On VMS, fork() is very slow and so
1774 we don't want to run a subprocess. On the other hand, I'm not sure how
1775 performance compares. */
1777 static int validate_download = 0;
1779 /* Callback service function for generic_load (bfd_map_over_sections). */
1782 add_section_size_callback (bfd *abfd, asection *asec, void *data)
1784 bfd_size_type *sum = data;
1786 *sum += bfd_get_section_size (asec);
1789 /* Opaque data for load_section_callback. */
1790 struct load_section_data {
1791 unsigned long load_offset;
1792 struct load_progress_data *progress_data;
1793 VEC(memory_write_request_s) *requests;
1796 /* Opaque data for load_progress. */
1797 struct load_progress_data {
1798 /* Cumulative data. */
1799 unsigned long write_count;
1800 unsigned long data_count;
1801 bfd_size_type total_size;
1804 /* Opaque data for load_progress for a single section. */
1805 struct load_progress_section_data {
1806 struct load_progress_data *cumulative;
1808 /* Per-section data. */
1809 const char *section_name;
1810 ULONGEST section_sent;
1811 ULONGEST section_size;
1816 /* Target write callback routine for progress reporting. */
1819 load_progress (ULONGEST bytes, void *untyped_arg)
1821 struct load_progress_section_data *args = untyped_arg;
1822 struct load_progress_data *totals;
1825 /* Writing padding data. No easy way to get at the cumulative
1826 stats, so just ignore this. */
1829 totals = args->cumulative;
1831 if (bytes == 0 && args->section_sent == 0)
1833 /* The write is just starting. Let the user know we've started
1835 ui_out_message (uiout, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1836 args->section_name, paddr_nz (args->section_size),
1837 paddr_nz (args->lma));
1841 if (validate_download)
1843 /* Broken memories and broken monitors manifest themselves here
1844 when bring new computers to life. This doubles already slow
1846 /* NOTE: cagney/1999-10-18: A more efficient implementation
1847 might add a verify_memory() method to the target vector and
1848 then use that. remote.c could implement that method using
1849 the ``qCRC'' packet. */
1850 gdb_byte *check = xmalloc (bytes);
1851 struct cleanup *verify_cleanups = make_cleanup (xfree, check);
1853 if (target_read_memory (args->lma, check, bytes) != 0)
1854 error (_("Download verify read failed at 0x%s"),
1856 if (memcmp (args->buffer, check, bytes) != 0)
1857 error (_("Download verify compare failed at 0x%s"),
1859 do_cleanups (verify_cleanups);
1861 totals->data_count += bytes;
1863 args->buffer += bytes;
1864 totals->write_count += 1;
1865 args->section_sent += bytes;
1867 || (deprecated_ui_load_progress_hook != NULL
1868 && deprecated_ui_load_progress_hook (args->section_name,
1869 args->section_sent)))
1870 error (_("Canceled the download"));
1872 if (deprecated_show_load_progress != NULL)
1873 deprecated_show_load_progress (args->section_name,
1877 totals->total_size);
1880 /* Callback service function for generic_load (bfd_map_over_sections). */
1883 load_section_callback (bfd *abfd, asection *asec, void *data)
1885 struct memory_write_request *new_request;
1886 struct load_section_data *args = data;
1887 struct load_progress_section_data *section_data;
1888 bfd_size_type size = bfd_get_section_size (asec);
1890 const char *sect_name = bfd_get_section_name (abfd, asec);
1892 if ((bfd_get_section_flags (abfd, asec) & SEC_LOAD) == 0)
1898 new_request = VEC_safe_push (memory_write_request_s,
1899 args->requests, NULL);
1900 memset (new_request, 0, sizeof (struct memory_write_request));
1901 section_data = xcalloc (1, sizeof (struct load_progress_section_data));
1902 new_request->begin = bfd_section_lma (abfd, asec) + args->load_offset;
1903 new_request->end = new_request->begin + size; /* FIXME Should size be in instead? */
1904 new_request->data = xmalloc (size);
1905 new_request->baton = section_data;
1907 buffer = new_request->data;
1909 section_data->cumulative = args->progress_data;
1910 section_data->section_name = sect_name;
1911 section_data->section_size = size;
1912 section_data->lma = new_request->begin;
1913 section_data->buffer = buffer;
1915 bfd_get_section_contents (abfd, asec, buffer, 0, size);
1918 /* Clean up an entire memory request vector, including load
1919 data and progress records. */
1922 clear_memory_write_data (void *arg)
1924 VEC(memory_write_request_s) **vec_p = arg;
1925 VEC(memory_write_request_s) *vec = *vec_p;
1927 struct memory_write_request *mr;
1929 for (i = 0; VEC_iterate (memory_write_request_s, vec, i, mr); ++i)
1934 VEC_free (memory_write_request_s, vec);
1938 generic_load (char *args, int from_tty)
1941 struct timeval start_time, end_time;
1943 struct cleanup *old_cleanups = make_cleanup (null_cleanup, 0);
1944 struct load_section_data cbdata;
1945 struct load_progress_data total_progress;
1950 memset (&cbdata, 0, sizeof (cbdata));
1951 memset (&total_progress, 0, sizeof (total_progress));
1952 cbdata.progress_data = &total_progress;
1954 make_cleanup (clear_memory_write_data, &cbdata.requests);
1956 argv = buildargv (args);
1961 make_cleanup_freeargv (argv);
1963 filename = tilde_expand (argv[0]);
1964 make_cleanup (xfree, filename);
1966 if (argv[1] != NULL)
1970 cbdata.load_offset = strtoul (argv[1], &endptr, 0);
1972 /* If the last word was not a valid number then
1973 treat it as a file name with spaces in. */
1974 if (argv[1] == endptr)
1975 error (_("Invalid download offset:%s."), argv[1]);
1977 if (argv[2] != NULL)
1978 error (_("Too many parameters."));
1981 /* Open the file for loading. */
1982 loadfile_bfd = bfd_openr (filename, gnutarget);
1983 if (loadfile_bfd == NULL)
1985 perror_with_name (filename);
1989 /* FIXME: should be checking for errors from bfd_close (for one thing,
1990 on error it does not free all the storage associated with the
1992 make_cleanup_bfd_close (loadfile_bfd);
1994 if (!bfd_check_format (loadfile_bfd, bfd_object))
1996 error (_("\"%s\" is not an object file: %s"), filename,
1997 bfd_errmsg (bfd_get_error ()));
2000 bfd_map_over_sections (loadfile_bfd, add_section_size_callback,
2001 (void *) &total_progress.total_size);
2003 bfd_map_over_sections (loadfile_bfd, load_section_callback, &cbdata);
2005 gettimeofday (&start_time, NULL);
2007 if (target_write_memory_blocks (cbdata.requests, flash_discard,
2008 load_progress) != 0)
2009 error (_("Load failed"));
2011 gettimeofday (&end_time, NULL);
2013 entry = bfd_get_start_address (loadfile_bfd);
2014 ui_out_text (uiout, "Start address ");
2015 ui_out_field_fmt (uiout, "address", "0x%s", paddr_nz (entry));
2016 ui_out_text (uiout, ", load size ");
2017 ui_out_field_fmt (uiout, "load-size", "%lu", total_progress.data_count);
2018 ui_out_text (uiout, "\n");
2019 /* We were doing this in remote-mips.c, I suspect it is right
2020 for other targets too. */
2023 /* FIXME: are we supposed to call symbol_file_add or not? According
2024 to a comment from remote-mips.c (where a call to symbol_file_add
2025 was commented out), making the call confuses GDB if more than one
2026 file is loaded in. Some targets do (e.g., remote-vx.c) but
2027 others don't (or didn't - perhaps they have all been deleted). */
2029 print_transfer_performance (gdb_stdout, total_progress.data_count,
2030 total_progress.write_count,
2031 &start_time, &end_time);
2033 do_cleanups (old_cleanups);
2036 /* Report how fast the transfer went. */
2038 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
2039 replaced by print_transfer_performance (with a very different
2040 function signature). */
2043 report_transfer_performance (unsigned long data_count, time_t start_time,
2046 struct timeval start, end;
2048 start.tv_sec = start_time;
2050 end.tv_sec = end_time;
2053 print_transfer_performance (gdb_stdout, data_count, 0, &start, &end);
2057 print_transfer_performance (struct ui_file *stream,
2058 unsigned long data_count,
2059 unsigned long write_count,
2060 const struct timeval *start_time,
2061 const struct timeval *end_time)
2063 ULONGEST time_count;
2065 /* Compute the elapsed time in milliseconds, as a tradeoff between
2066 accuracy and overflow. */
2067 time_count = (end_time->tv_sec - start_time->tv_sec) * 1000;
2068 time_count += (end_time->tv_usec - start_time->tv_usec) / 1000;
2070 ui_out_text (uiout, "Transfer rate: ");
2073 unsigned long rate = ((ULONGEST) data_count * 1000) / time_count;
2075 if (ui_out_is_mi_like_p (uiout))
2077 ui_out_field_fmt (uiout, "transfer-rate", "%lu", rate * 8);
2078 ui_out_text (uiout, " bits/sec");
2080 else if (rate < 1024)
2082 ui_out_field_fmt (uiout, "transfer-rate", "%lu", rate);
2083 ui_out_text (uiout, " bytes/sec");
2087 ui_out_field_fmt (uiout, "transfer-rate", "%lu", rate / 1024);
2088 ui_out_text (uiout, " KB/sec");
2093 ui_out_field_fmt (uiout, "transferred-bits", "%lu", (data_count * 8));
2094 ui_out_text (uiout, " bits in <1 sec");
2096 if (write_count > 0)
2098 ui_out_text (uiout, ", ");
2099 ui_out_field_fmt (uiout, "write-rate", "%lu", data_count / write_count);
2100 ui_out_text (uiout, " bytes/write");
2102 ui_out_text (uiout, ".\n");
2105 /* This function allows the addition of incrementally linked object files.
2106 It does not modify any state in the target, only in the debugger. */
2107 /* Note: ezannoni 2000-04-13 This function/command used to have a
2108 special case syntax for the rombug target (Rombug is the boot
2109 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2110 rombug case, the user doesn't need to supply a text address,
2111 instead a call to target_link() (in target.c) would supply the
2112 value to use. We are now discontinuing this type of ad hoc syntax. */
2115 add_symbol_file_command (char *args, int from_tty)
2117 char *filename = NULL;
2118 int flags = OBJF_USERLOADED;
2120 int expecting_option = 0;
2121 int section_index = 0;
2125 int expecting_sec_name = 0;
2126 int expecting_sec_addr = 0;
2135 struct section_addr_info *section_addrs;
2136 struct sect_opt *sect_opts = NULL;
2137 size_t num_sect_opts = 0;
2138 struct cleanup *my_cleanups = make_cleanup (null_cleanup, NULL);
2141 sect_opts = (struct sect_opt *) xmalloc (num_sect_opts
2142 * sizeof (struct sect_opt));
2147 error (_("add-symbol-file takes a file name and an address"));
2149 argv = buildargv (args);
2150 make_cleanup_freeargv (argv);
2155 for (arg = argv[0], argcnt = 0; arg != NULL; arg = argv[++argcnt])
2157 /* Process the argument. */
2160 /* The first argument is the file name. */
2161 filename = tilde_expand (arg);
2162 make_cleanup (xfree, filename);
2167 /* The second argument is always the text address at which
2168 to load the program. */
2169 sect_opts[section_index].name = ".text";
2170 sect_opts[section_index].value = arg;
2171 if (++section_index >= num_sect_opts)
2174 sect_opts = ((struct sect_opt *)
2175 xrealloc (sect_opts,
2177 * sizeof (struct sect_opt)));
2182 /* It's an option (starting with '-') or it's an argument
2187 if (strcmp (arg, "-readnow") == 0)
2188 flags |= OBJF_READNOW;
2189 else if (strcmp (arg, "-s") == 0)
2191 expecting_sec_name = 1;
2192 expecting_sec_addr = 1;
2197 if (expecting_sec_name)
2199 sect_opts[section_index].name = arg;
2200 expecting_sec_name = 0;
2203 if (expecting_sec_addr)
2205 sect_opts[section_index].value = arg;
2206 expecting_sec_addr = 0;
2207 if (++section_index >= num_sect_opts)
2210 sect_opts = ((struct sect_opt *)
2211 xrealloc (sect_opts,
2213 * sizeof (struct sect_opt)));
2217 error (_("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*"));
2222 /* This command takes at least two arguments. The first one is a
2223 filename, and the second is the address where this file has been
2224 loaded. Abort now if this address hasn't been provided by the
2226 if (section_index < 1)
2227 error (_("The address where %s has been loaded is missing"), filename);
2229 /* Print the prompt for the query below. And save the arguments into
2230 a sect_addr_info structure to be passed around to other
2231 functions. We have to split this up into separate print
2232 statements because hex_string returns a local static
2235 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename);
2236 section_addrs = alloc_section_addr_info (section_index);
2237 make_cleanup (xfree, section_addrs);
2238 for (i = 0; i < section_index; i++)
2241 char *val = sect_opts[i].value;
2242 char *sec = sect_opts[i].name;
2244 addr = parse_and_eval_address (val);
2246 /* Here we store the section offsets in the order they were
2247 entered on the command line. */
2248 section_addrs->other[sec_num].name = sec;
2249 section_addrs->other[sec_num].addr = addr;
2250 printf_unfiltered ("\t%s_addr = %s\n",
2251 sec, hex_string ((unsigned long)addr));
2254 /* The object's sections are initialized when a
2255 call is made to build_objfile_section_table (objfile).
2256 This happens in reread_symbols.
2257 At this point, we don't know what file type this is,
2258 so we can't determine what section names are valid. */
2261 if (from_tty && (!query ("%s", "")))
2262 error (_("Not confirmed."));
2264 symbol_file_add (filename, from_tty, section_addrs, 0, flags);
2266 /* Getting new symbols may change our opinion about what is
2268 reinit_frame_cache ();
2269 do_cleanups (my_cleanups);
2273 add_shared_symbol_files_command (char *args, int from_tty)
2275 #ifdef ADD_SHARED_SYMBOL_FILES
2276 ADD_SHARED_SYMBOL_FILES (args, from_tty);
2278 error (_("This command is not available in this configuration of GDB."));
2282 /* Re-read symbols if a symbol-file has changed. */
2284 reread_symbols (void)
2286 struct objfile *objfile;
2289 struct stat new_statbuf;
2292 /* With the addition of shared libraries, this should be modified,
2293 the load time should be saved in the partial symbol tables, since
2294 different tables may come from different source files. FIXME.
2295 This routine should then walk down each partial symbol table
2296 and see if the symbol table that it originates from has been changed */
2298 for (objfile = object_files; objfile; objfile = objfile->next)
2302 #ifdef DEPRECATED_IBM6000_TARGET
2303 /* If this object is from a shared library, then you should
2304 stat on the library name, not member name. */
2306 if (objfile->obfd->my_archive)
2307 res = stat (objfile->obfd->my_archive->filename, &new_statbuf);
2310 res = stat (objfile->name, &new_statbuf);
2313 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2314 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2318 new_modtime = new_statbuf.st_mtime;
2319 if (new_modtime != objfile->mtime)
2321 struct cleanup *old_cleanups;
2322 struct section_offsets *offsets;
2324 char *obfd_filename;
2326 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2329 /* There are various functions like symbol_file_add,
2330 symfile_bfd_open, syms_from_objfile, etc., which might
2331 appear to do what we want. But they have various other
2332 effects which we *don't* want. So we just do stuff
2333 ourselves. We don't worry about mapped files (for one thing,
2334 any mapped file will be out of date). */
2336 /* If we get an error, blow away this objfile (not sure if
2337 that is the correct response for things like shared
2339 old_cleanups = make_cleanup_free_objfile (objfile);
2340 /* We need to do this whenever any symbols go away. */
2341 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
2343 /* Clean up any state BFD has sitting around. We don't need
2344 to close the descriptor but BFD lacks a way of closing the
2345 BFD without closing the descriptor. */
2346 obfd_filename = bfd_get_filename (objfile->obfd);
2347 if (!bfd_close (objfile->obfd))
2348 error (_("Can't close BFD for %s: %s"), objfile->name,
2349 bfd_errmsg (bfd_get_error ()));
2350 objfile->obfd = bfd_openr (obfd_filename, gnutarget);
2351 if (objfile->obfd == NULL)
2352 error (_("Can't open %s to read symbols."), objfile->name);
2353 /* bfd_openr sets cacheable to true, which is what we want. */
2354 if (!bfd_check_format (objfile->obfd, bfd_object))
2355 error (_("Can't read symbols from %s: %s."), objfile->name,
2356 bfd_errmsg (bfd_get_error ()));
2358 /* Save the offsets, we will nuke them with the rest of the
2360 num_offsets = objfile->num_sections;
2361 offsets = ((struct section_offsets *)
2362 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets)));
2363 memcpy (offsets, objfile->section_offsets,
2364 SIZEOF_N_SECTION_OFFSETS (num_offsets));
2366 /* Remove any references to this objfile in the global
2368 preserve_values (objfile);
2370 /* Nuke all the state that we will re-read. Much of the following
2371 code which sets things to NULL really is necessary to tell
2372 other parts of GDB that there is nothing currently there. */
2374 /* FIXME: Do we have to free a whole linked list, or is this
2376 if (objfile->global_psymbols.list)
2377 xfree (objfile->global_psymbols.list);
2378 memset (&objfile->global_psymbols, 0,
2379 sizeof (objfile->global_psymbols));
2380 if (objfile->static_psymbols.list)
2381 xfree (objfile->static_psymbols.list);
2382 memset (&objfile->static_psymbols, 0,
2383 sizeof (objfile->static_psymbols));
2385 /* Free the obstacks for non-reusable objfiles */
2386 bcache_xfree (objfile->psymbol_cache);
2387 objfile->psymbol_cache = bcache_xmalloc ();
2388 bcache_xfree (objfile->macro_cache);
2389 objfile->macro_cache = bcache_xmalloc ();
2390 if (objfile->demangled_names_hash != NULL)
2392 htab_delete (objfile->demangled_names_hash);
2393 objfile->demangled_names_hash = NULL;
2395 obstack_free (&objfile->objfile_obstack, 0);
2396 objfile->sections = NULL;
2397 objfile->symtabs = NULL;
2398 objfile->psymtabs = NULL;
2399 objfile->free_psymtabs = NULL;
2400 objfile->cp_namespace_symtab = NULL;
2401 objfile->msymbols = NULL;
2402 objfile->deprecated_sym_private = NULL;
2403 objfile->minimal_symbol_count = 0;
2404 memset (&objfile->msymbol_hash, 0,
2405 sizeof (objfile->msymbol_hash));
2406 memset (&objfile->msymbol_demangled_hash, 0,
2407 sizeof (objfile->msymbol_demangled_hash));
2408 objfile->fundamental_types = NULL;
2409 clear_objfile_data (objfile);
2410 if (objfile->sf != NULL)
2412 (*objfile->sf->sym_finish) (objfile);
2415 /* We never make this a mapped file. */
2417 objfile->psymbol_cache = bcache_xmalloc ();
2418 objfile->macro_cache = bcache_xmalloc ();
2419 /* obstack_init also initializes the obstack so it is
2420 empty. We could use obstack_specify_allocation but
2421 gdb_obstack.h specifies the alloc/dealloc
2423 obstack_init (&objfile->objfile_obstack);
2424 if (build_objfile_section_table (objfile))
2426 error (_("Can't find the file sections in `%s': %s"),
2427 objfile->name, bfd_errmsg (bfd_get_error ()));
2429 terminate_minimal_symbol_table (objfile);
2431 /* We use the same section offsets as from last time. I'm not
2432 sure whether that is always correct for shared libraries. */
2433 objfile->section_offsets = (struct section_offsets *)
2434 obstack_alloc (&objfile->objfile_obstack,
2435 SIZEOF_N_SECTION_OFFSETS (num_offsets));
2436 memcpy (objfile->section_offsets, offsets,
2437 SIZEOF_N_SECTION_OFFSETS (num_offsets));
2438 objfile->num_sections = num_offsets;
2440 /* What the hell is sym_new_init for, anyway? The concept of
2441 distinguishing between the main file and additional files
2442 in this way seems rather dubious. */
2443 if (objfile == symfile_objfile)
2445 (*objfile->sf->sym_new_init) (objfile);
2448 (*objfile->sf->sym_init) (objfile);
2449 clear_complaints (&symfile_complaints, 1, 1);
2450 /* The "mainline" parameter is a hideous hack; I think leaving it
2451 zero is OK since dbxread.c also does what it needs to do if
2452 objfile->global_psymbols.size is 0. */
2453 (*objfile->sf->sym_read) (objfile, 0);
2454 if (!have_partial_symbols () && !have_full_symbols ())
2457 printf_unfiltered (_("(no debugging symbols found)\n"));
2460 objfile->flags |= OBJF_SYMS;
2462 /* We're done reading the symbol file; finish off complaints. */
2463 clear_complaints (&symfile_complaints, 0, 1);
2465 /* Getting new symbols may change our opinion about what is
2468 reinit_frame_cache ();
2470 /* Discard cleanups as symbol reading was successful. */
2471 discard_cleanups (old_cleanups);
2473 /* If the mtime has changed between the time we set new_modtime
2474 and now, we *want* this to be out of date, so don't call stat
2476 objfile->mtime = new_modtime;
2478 reread_separate_symbols (objfile);
2485 clear_symtab_users ();
2486 /* At least one objfile has changed, so we can consider that
2487 the executable we're debugging has changed too. */
2488 observer_notify_executable_changed (NULL);
2494 /* Handle separate debug info for OBJFILE, which has just been
2496 - If we had separate debug info before, but now we don't, get rid
2497 of the separated objfile.
2498 - If we didn't have separated debug info before, but now we do,
2499 read in the new separated debug info file.
2500 - If the debug link points to a different file, toss the old one
2501 and read the new one.
2502 This function does *not* handle the case where objfile is still
2503 using the same separate debug info file, but that file's timestamp
2504 has changed. That case should be handled by the loop in
2505 reread_symbols already. */
2507 reread_separate_symbols (struct objfile *objfile)
2510 unsigned long crc32;
2512 /* Does the updated objfile's debug info live in a
2514 debug_file = find_separate_debug_file (objfile);
2516 if (objfile->separate_debug_objfile)
2518 /* There are two cases where we need to get rid of
2519 the old separated debug info objfile:
2520 - if the new primary objfile doesn't have
2521 separated debug info, or
2522 - if the new primary objfile has separate debug
2523 info, but it's under a different filename.
2525 If the old and new objfiles both have separate
2526 debug info, under the same filename, then we're
2527 okay --- if the separated file's contents have
2528 changed, we will have caught that when we
2529 visited it in this function's outermost
2532 || strcmp (debug_file, objfile->separate_debug_objfile->name) != 0)
2533 free_objfile (objfile->separate_debug_objfile);
2536 /* If the new objfile has separate debug info, and we
2537 haven't loaded it already, do so now. */
2539 && ! objfile->separate_debug_objfile)
2541 /* Use the same section offset table as objfile itself.
2542 Preserve the flags from objfile that make sense. */
2543 objfile->separate_debug_objfile
2544 = (symbol_file_add_with_addrs_or_offsets
2545 (symfile_bfd_open (debug_file),
2546 info_verbose, /* from_tty: Don't override the default. */
2547 0, /* No addr table. */
2548 objfile->section_offsets, objfile->num_sections,
2549 0, /* Not mainline. See comments about this above. */
2550 objfile->flags & (OBJF_REORDERED | OBJF_SHARED | OBJF_READNOW
2551 | OBJF_USERLOADED)));
2552 objfile->separate_debug_objfile->separate_debug_objfile_backlink
2570 static filename_language *filename_language_table;
2571 static int fl_table_size, fl_table_next;
2574 add_filename_language (char *ext, enum language lang)
2576 if (fl_table_next >= fl_table_size)
2578 fl_table_size += 10;
2579 filename_language_table =
2580 xrealloc (filename_language_table,
2581 fl_table_size * sizeof (*filename_language_table));
2584 filename_language_table[fl_table_next].ext = xstrdup (ext);
2585 filename_language_table[fl_table_next].lang = lang;
2589 static char *ext_args;
2591 show_ext_args (struct ui_file *file, int from_tty,
2592 struct cmd_list_element *c, const char *value)
2594 fprintf_filtered (file, _("\
2595 Mapping between filename extension and source language is \"%s\".\n"),
2600 set_ext_lang_command (char *args, int from_tty, struct cmd_list_element *e)
2603 char *cp = ext_args;
2606 /* First arg is filename extension, starting with '.' */
2608 error (_("'%s': Filename extension must begin with '.'"), ext_args);
2610 /* Find end of first arg. */
2611 while (*cp && !isspace (*cp))
2615 error (_("'%s': two arguments required -- filename extension and language"),
2618 /* Null-terminate first arg */
2621 /* Find beginning of second arg, which should be a source language. */
2622 while (*cp && isspace (*cp))
2626 error (_("'%s': two arguments required -- filename extension and language"),
2629 /* Lookup the language from among those we know. */
2630 lang = language_enum (cp);
2632 /* Now lookup the filename extension: do we already know it? */
2633 for (i = 0; i < fl_table_next; i++)
2634 if (0 == strcmp (ext_args, filename_language_table[i].ext))
2637 if (i >= fl_table_next)
2639 /* new file extension */
2640 add_filename_language (ext_args, lang);
2644 /* redefining a previously known filename extension */
2647 /* query ("Really make files of type %s '%s'?", */
2648 /* ext_args, language_str (lang)); */
2650 xfree (filename_language_table[i].ext);
2651 filename_language_table[i].ext = xstrdup (ext_args);
2652 filename_language_table[i].lang = lang;
2657 info_ext_lang_command (char *args, int from_tty)
2661 printf_filtered (_("Filename extensions and the languages they represent:"));
2662 printf_filtered ("\n\n");
2663 for (i = 0; i < fl_table_next; i++)
2664 printf_filtered ("\t%s\t- %s\n",
2665 filename_language_table[i].ext,
2666 language_str (filename_language_table[i].lang));
2670 init_filename_language_table (void)
2672 if (fl_table_size == 0) /* protect against repetition */
2676 filename_language_table =
2677 xmalloc (fl_table_size * sizeof (*filename_language_table));
2678 add_filename_language (".c", language_c);
2679 add_filename_language (".C", language_cplus);
2680 add_filename_language (".cc", language_cplus);
2681 add_filename_language (".cp", language_cplus);
2682 add_filename_language (".cpp", language_cplus);
2683 add_filename_language (".cxx", language_cplus);
2684 add_filename_language (".c++", language_cplus);
2685 add_filename_language (".java", language_java);
2686 add_filename_language (".class", language_java);
2687 add_filename_language (".m", language_objc);
2688 add_filename_language (".f", language_fortran);
2689 add_filename_language (".F", language_fortran);
2690 add_filename_language (".s", language_asm);
2691 add_filename_language (".S", language_asm);
2692 add_filename_language (".pas", language_pascal);
2693 add_filename_language (".p", language_pascal);
2694 add_filename_language (".pp", language_pascal);
2695 add_filename_language (".adb", language_ada);
2696 add_filename_language (".ads", language_ada);
2697 add_filename_language (".a", language_ada);
2698 add_filename_language (".ada", language_ada);
2703 deduce_language_from_filename (char *filename)
2708 if (filename != NULL)
2709 if ((cp = strrchr (filename, '.')) != NULL)
2710 for (i = 0; i < fl_table_next; i++)
2711 if (strcmp (cp, filename_language_table[i].ext) == 0)
2712 return filename_language_table[i].lang;
2714 return language_unknown;
2719 Allocate and partly initialize a new symbol table. Return a pointer
2720 to it. error() if no space.
2722 Caller must set these fields:
2728 possibly free_named_symtabs (symtab->filename);
2732 allocate_symtab (char *filename, struct objfile *objfile)
2734 struct symtab *symtab;
2736 symtab = (struct symtab *)
2737 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symtab));
2738 memset (symtab, 0, sizeof (*symtab));
2739 symtab->filename = obsavestring (filename, strlen (filename),
2740 &objfile->objfile_obstack);
2741 symtab->fullname = NULL;
2742 symtab->language = deduce_language_from_filename (filename);
2743 symtab->debugformat = obsavestring ("unknown", 7,
2744 &objfile->objfile_obstack);
2746 /* Hook it to the objfile it comes from */
2748 symtab->objfile = objfile;
2749 symtab->next = objfile->symtabs;
2750 objfile->symtabs = symtab;
2755 struct partial_symtab *
2756 allocate_psymtab (char *filename, struct objfile *objfile)
2758 struct partial_symtab *psymtab;
2760 if (objfile->free_psymtabs)
2762 psymtab = objfile->free_psymtabs;
2763 objfile->free_psymtabs = psymtab->next;
2766 psymtab = (struct partial_symtab *)
2767 obstack_alloc (&objfile->objfile_obstack,
2768 sizeof (struct partial_symtab));
2770 memset (psymtab, 0, sizeof (struct partial_symtab));
2771 psymtab->filename = obsavestring (filename, strlen (filename),
2772 &objfile->objfile_obstack);
2773 psymtab->symtab = NULL;
2775 /* Prepend it to the psymtab list for the objfile it belongs to.
2776 Psymtabs are searched in most recent inserted -> least recent
2779 psymtab->objfile = objfile;
2780 psymtab->next = objfile->psymtabs;
2781 objfile->psymtabs = psymtab;
2784 struct partial_symtab **prev_pst;
2785 psymtab->objfile = objfile;
2786 psymtab->next = NULL;
2787 prev_pst = &(objfile->psymtabs);
2788 while ((*prev_pst) != NULL)
2789 prev_pst = &((*prev_pst)->next);
2790 (*prev_pst) = psymtab;
2798 discard_psymtab (struct partial_symtab *pst)
2800 struct partial_symtab **prev_pst;
2803 Empty psymtabs happen as a result of header files which don't
2804 have any symbols in them. There can be a lot of them. But this
2805 check is wrong, in that a psymtab with N_SLINE entries but
2806 nothing else is not empty, but we don't realize that. Fixing
2807 that without slowing things down might be tricky. */
2809 /* First, snip it out of the psymtab chain */
2811 prev_pst = &(pst->objfile->psymtabs);
2812 while ((*prev_pst) != pst)
2813 prev_pst = &((*prev_pst)->next);
2814 (*prev_pst) = pst->next;
2816 /* Next, put it on a free list for recycling */
2818 pst->next = pst->objfile->free_psymtabs;
2819 pst->objfile->free_psymtabs = pst;
2823 /* Reset all data structures in gdb which may contain references to symbol
2827 clear_symtab_users (void)
2829 /* Someday, we should do better than this, by only blowing away
2830 the things that really need to be blown. */
2832 /* Clear the "current" symtab first, because it is no longer valid.
2833 breakpoint_re_set may try to access the current symtab. */
2834 clear_current_source_symtab_and_line ();
2837 breakpoint_re_set ();
2838 set_default_breakpoint (0, 0, 0, 0);
2839 clear_pc_function_cache ();
2840 observer_notify_new_objfile (NULL);
2842 /* Clear globals which might have pointed into a removed objfile.
2843 FIXME: It's not clear which of these are supposed to persist
2844 between expressions and which ought to be reset each time. */
2845 expression_context_block = NULL;
2846 innermost_block = NULL;
2848 /* Varobj may refer to old symbols, perform a cleanup. */
2849 varobj_invalidate ();
2854 clear_symtab_users_cleanup (void *ignore)
2856 clear_symtab_users ();
2859 /* clear_symtab_users_once:
2861 This function is run after symbol reading, or from a cleanup.
2862 If an old symbol table was obsoleted, the old symbol table
2863 has been blown away, but the other GDB data structures that may
2864 reference it have not yet been cleared or re-directed. (The old
2865 symtab was zapped, and the cleanup queued, in free_named_symtab()
2868 This function can be queued N times as a cleanup, or called
2869 directly; it will do all the work the first time, and then will be a
2870 no-op until the next time it is queued. This works by bumping a
2871 counter at queueing time. Much later when the cleanup is run, or at
2872 the end of symbol processing (in case the cleanup is discarded), if
2873 the queued count is greater than the "done-count", we do the work
2874 and set the done-count to the queued count. If the queued count is
2875 less than or equal to the done-count, we just ignore the call. This
2876 is needed because reading a single .o file will often replace many
2877 symtabs (one per .h file, for example), and we don't want to reset
2878 the breakpoints N times in the user's face.
2880 The reason we both queue a cleanup, and call it directly after symbol
2881 reading, is because the cleanup protects us in case of errors, but is
2882 discarded if symbol reading is successful. */
2885 /* FIXME: As free_named_symtabs is currently a big noop this function
2886 is no longer needed. */
2887 static void clear_symtab_users_once (void);
2889 static int clear_symtab_users_queued;
2890 static int clear_symtab_users_done;
2893 clear_symtab_users_once (void)
2895 /* Enforce once-per-`do_cleanups'-semantics */
2896 if (clear_symtab_users_queued <= clear_symtab_users_done)
2898 clear_symtab_users_done = clear_symtab_users_queued;
2900 clear_symtab_users ();
2904 /* Delete the specified psymtab, and any others that reference it. */
2907 cashier_psymtab (struct partial_symtab *pst)
2909 struct partial_symtab *ps, *pprev = NULL;
2912 /* Find its previous psymtab in the chain */
2913 for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
2922 /* Unhook it from the chain. */
2923 if (ps == pst->objfile->psymtabs)
2924 pst->objfile->psymtabs = ps->next;
2926 pprev->next = ps->next;
2928 /* FIXME, we can't conveniently deallocate the entries in the
2929 partial_symbol lists (global_psymbols/static_psymbols) that
2930 this psymtab points to. These just take up space until all
2931 the psymtabs are reclaimed. Ditto the dependencies list and
2932 filename, which are all in the objfile_obstack. */
2934 /* We need to cashier any psymtab that has this one as a dependency... */
2936 for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
2938 for (i = 0; i < ps->number_of_dependencies; i++)
2940 if (ps->dependencies[i] == pst)
2942 cashier_psymtab (ps);
2943 goto again; /* Must restart, chain has been munged. */
2950 /* If a symtab or psymtab for filename NAME is found, free it along
2951 with any dependent breakpoints, displays, etc.
2952 Used when loading new versions of object modules with the "add-file"
2953 command. This is only called on the top-level symtab or psymtab's name;
2954 it is not called for subsidiary files such as .h files.
2956 Return value is 1 if we blew away the environment, 0 if not.
2957 FIXME. The return value appears to never be used.
2959 FIXME. I think this is not the best way to do this. We should
2960 work on being gentler to the environment while still cleaning up
2961 all stray pointers into the freed symtab. */
2964 free_named_symtabs (char *name)
2967 /* FIXME: With the new method of each objfile having it's own
2968 psymtab list, this function needs serious rethinking. In particular,
2969 why was it ever necessary to toss psymtabs with specific compilation
2970 unit filenames, as opposed to all psymtabs from a particular symbol
2972 Well, the answer is that some systems permit reloading of particular
2973 compilation units. We want to blow away any old info about these
2974 compilation units, regardless of which objfiles they arrived in. --gnu. */
2977 struct symtab *prev;
2978 struct partial_symtab *ps;
2979 struct blockvector *bv;
2982 /* We only wack things if the symbol-reload switch is set. */
2983 if (!symbol_reloading)
2986 /* Some symbol formats have trouble providing file names... */
2987 if (name == 0 || *name == '\0')
2990 /* Look for a psymtab with the specified name. */
2993 for (ps = partial_symtab_list; ps; ps = ps->next)
2995 if (strcmp (name, ps->filename) == 0)
2997 cashier_psymtab (ps); /* Blow it away...and its little dog, too. */
2998 goto again2; /* Must restart, chain has been munged */
3002 /* Look for a symtab with the specified name. */
3004 for (s = symtab_list; s; s = s->next)
3006 if (strcmp (name, s->filename) == 0)
3013 if (s == symtab_list)
3014 symtab_list = s->next;
3016 prev->next = s->next;
3018 /* For now, queue a delete for all breakpoints, displays, etc., whether
3019 or not they depend on the symtab being freed. This should be
3020 changed so that only those data structures affected are deleted. */
3022 /* But don't delete anything if the symtab is empty.
3023 This test is necessary due to a bug in "dbxread.c" that
3024 causes empty symtabs to be created for N_SO symbols that
3025 contain the pathname of the object file. (This problem
3026 has been fixed in GDB 3.9x). */
3028 bv = BLOCKVECTOR (s);
3029 if (BLOCKVECTOR_NBLOCKS (bv) > 2
3030 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK))
3031 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)))
3033 complaint (&symfile_complaints, _("Replacing old symbols for `%s'"),
3035 clear_symtab_users_queued++;
3036 make_cleanup (clear_symtab_users_once, 0);
3040 complaint (&symfile_complaints, _("Empty symbol table found for `%s'"),
3047 /* It is still possible that some breakpoints will be affected
3048 even though no symtab was found, since the file might have
3049 been compiled without debugging, and hence not be associated
3050 with a symtab. In order to handle this correctly, we would need
3051 to keep a list of text address ranges for undebuggable files.
3052 For now, we do nothing, since this is a fairly obscure case. */
3056 /* FIXME, what about the minimal symbol table? */
3063 /* Allocate and partially fill a partial symtab. It will be
3064 completely filled at the end of the symbol list.
3066 FILENAME is the name of the symbol-file we are reading from. */
3068 struct partial_symtab *
3069 start_psymtab_common (struct objfile *objfile,
3070 struct section_offsets *section_offsets, char *filename,
3071 CORE_ADDR textlow, struct partial_symbol **global_syms,
3072 struct partial_symbol **static_syms)
3074 struct partial_symtab *psymtab;
3076 psymtab = allocate_psymtab (filename, objfile);
3077 psymtab->section_offsets = section_offsets;
3078 psymtab->textlow = textlow;
3079 psymtab->texthigh = psymtab->textlow; /* default */
3080 psymtab->globals_offset = global_syms - objfile->global_psymbols.list;
3081 psymtab->statics_offset = static_syms - objfile->static_psymbols.list;
3085 /* Add a symbol with a long value to a psymtab.
3086 Since one arg is a struct, we pass in a ptr and deref it (sigh).
3087 Return the partial symbol that has been added. */
3089 /* NOTE: carlton/2003-09-11: The reason why we return the partial
3090 symbol is so that callers can get access to the symbol's demangled
3091 name, which they don't have any cheap way to determine otherwise.
3092 (Currenly, dwarf2read.c is the only file who uses that information,
3093 though it's possible that other readers might in the future.)
3094 Elena wasn't thrilled about that, and I don't blame her, but we
3095 couldn't come up with a better way to get that information. If
3096 it's needed in other situations, we could consider breaking up
3097 SYMBOL_SET_NAMES to provide access to the demangled name lookup
3100 const struct partial_symbol *
3101 add_psymbol_to_list (char *name, int namelength, domain_enum domain,
3102 enum address_class class,
3103 struct psymbol_allocation_list *list, long val, /* Value as a long */
3104 CORE_ADDR coreaddr, /* Value as a CORE_ADDR */
3105 enum language language, struct objfile *objfile)
3107 struct partial_symbol *psym;
3108 char *buf = alloca (namelength + 1);
3109 /* psymbol is static so that there will be no uninitialized gaps in the
3110 structure which might contain random data, causing cache misses in
3112 static struct partial_symbol psymbol;
3114 /* Create local copy of the partial symbol */
3115 memcpy (buf, name, namelength);
3116 buf[namelength] = '\0';
3117 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
3120 SYMBOL_VALUE (&psymbol) = val;
3124 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
3126 SYMBOL_SECTION (&psymbol) = 0;
3127 SYMBOL_LANGUAGE (&psymbol) = language;
3128 PSYMBOL_DOMAIN (&psymbol) = domain;
3129 PSYMBOL_CLASS (&psymbol) = class;
3131 SYMBOL_SET_NAMES (&psymbol, buf, namelength, objfile);
3133 /* Stash the partial symbol away in the cache */
3134 psym = deprecated_bcache (&psymbol, sizeof (struct partial_symbol),
3135 objfile->psymbol_cache);
3137 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
3138 if (list->next >= list->list + list->size)
3140 extend_psymbol_list (list, objfile);
3142 *list->next++ = psym;
3143 OBJSTAT (objfile, n_psyms++);
3148 /* Initialize storage for partial symbols. */
3151 init_psymbol_list (struct objfile *objfile, int total_symbols)
3153 /* Free any previously allocated psymbol lists. */
3155 if (objfile->global_psymbols.list)
3157 xfree (objfile->global_psymbols.list);
3159 if (objfile->static_psymbols.list)
3161 xfree (objfile->static_psymbols.list);
3164 /* Current best guess is that approximately a twentieth
3165 of the total symbols (in a debugging file) are global or static
3168 objfile->global_psymbols.size = total_symbols / 10;
3169 objfile->static_psymbols.size = total_symbols / 10;
3171 if (objfile->global_psymbols.size > 0)
3173 objfile->global_psymbols.next =
3174 objfile->global_psymbols.list = (struct partial_symbol **)
3175 xmalloc ((objfile->global_psymbols.size
3176 * sizeof (struct partial_symbol *)));
3178 if (objfile->static_psymbols.size > 0)
3180 objfile->static_psymbols.next =
3181 objfile->static_psymbols.list = (struct partial_symbol **)
3182 xmalloc ((objfile->static_psymbols.size
3183 * sizeof (struct partial_symbol *)));
3188 The following code implements an abstraction for debugging overlay sections.
3190 The target model is as follows:
3191 1) The gnu linker will permit multiple sections to be mapped into the
3192 same VMA, each with its own unique LMA (or load address).
3193 2) It is assumed that some runtime mechanism exists for mapping the
3194 sections, one by one, from the load address into the VMA address.
3195 3) This code provides a mechanism for gdb to keep track of which
3196 sections should be considered to be mapped from the VMA to the LMA.
3197 This information is used for symbol lookup, and memory read/write.
3198 For instance, if a section has been mapped then its contents
3199 should be read from the VMA, otherwise from the LMA.
3201 Two levels of debugger support for overlays are available. One is
3202 "manual", in which the debugger relies on the user to tell it which
3203 overlays are currently mapped. This level of support is
3204 implemented entirely in the core debugger, and the information about
3205 whether a section is mapped is kept in the objfile->obj_section table.
3207 The second level of support is "automatic", and is only available if
3208 the target-specific code provides functionality to read the target's
3209 overlay mapping table, and translate its contents for the debugger
3210 (by updating the mapped state information in the obj_section tables).
3212 The interface is as follows:
3214 overlay map <name> -- tell gdb to consider this section mapped
3215 overlay unmap <name> -- tell gdb to consider this section unmapped
3216 overlay list -- list the sections that GDB thinks are mapped
3217 overlay read-target -- get the target's state of what's mapped
3218 overlay off/manual/auto -- set overlay debugging state
3219 Functional interface:
3220 find_pc_mapped_section(pc): if the pc is in the range of a mapped
3221 section, return that section.
3222 find_pc_overlay(pc): find any overlay section that contains
3223 the pc, either in its VMA or its LMA
3224 overlay_is_mapped(sect): true if overlay is marked as mapped
3225 section_is_overlay(sect): true if section's VMA != LMA
3226 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
3227 pc_in_unmapped_range(...): true if pc belongs to section's LMA
3228 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
3229 overlay_mapped_address(...): map an address from section's LMA to VMA
3230 overlay_unmapped_address(...): map an address from section's VMA to LMA
3231 symbol_overlayed_address(...): Return a "current" address for symbol:
3232 either in VMA or LMA depending on whether
3233 the symbol's section is currently mapped
3236 /* Overlay debugging state: */
3238 enum overlay_debugging_state overlay_debugging = ovly_off;
3239 int overlay_cache_invalid = 0; /* True if need to refresh mapped state */
3241 /* Function: section_is_overlay (SECTION)
3242 Returns true if SECTION has VMA not equal to LMA, ie.
3243 SECTION is loaded at an address different from where it will "run". */
3246 section_is_overlay (asection *section)
3248 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
3250 if (overlay_debugging)
3251 if (section && section->lma != 0 &&
3252 section->vma != section->lma)
3258 /* Function: overlay_invalidate_all (void)
3259 Invalidate the mapped state of all overlay sections (mark it as stale). */
3262 overlay_invalidate_all (void)
3264 struct objfile *objfile;
3265 struct obj_section *sect;
3267 ALL_OBJSECTIONS (objfile, sect)
3268 if (section_is_overlay (sect->the_bfd_section))
3269 sect->ovly_mapped = -1;
3272 /* Function: overlay_is_mapped (SECTION)
3273 Returns true if section is an overlay, and is currently mapped.
3274 Private: public access is thru function section_is_mapped.
3276 Access to the ovly_mapped flag is restricted to this function, so
3277 that we can do automatic update. If the global flag
3278 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
3279 overlay_invalidate_all. If the mapped state of the particular
3280 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
3283 overlay_is_mapped (struct obj_section *osect)
3285 if (osect == 0 || !section_is_overlay (osect->the_bfd_section))
3288 switch (overlay_debugging)
3292 return 0; /* overlay debugging off */
3293 case ovly_auto: /* overlay debugging automatic */
3294 /* Unles there is a gdbarch_overlay_update function,
3295 there's really nothing useful to do here (can't really go auto) */
3296 if (gdbarch_overlay_update_p (current_gdbarch))
3298 if (overlay_cache_invalid)
3300 overlay_invalidate_all ();
3301 overlay_cache_invalid = 0;
3303 if (osect->ovly_mapped == -1)
3304 gdbarch_overlay_update (current_gdbarch, osect);
3306 /* fall thru to manual case */
3307 case ovly_on: /* overlay debugging manual */
3308 return osect->ovly_mapped == 1;
3312 /* Function: section_is_mapped
3313 Returns true if section is an overlay, and is currently mapped. */
3316 section_is_mapped (asection *section)
3318 struct objfile *objfile;
3319 struct obj_section *osect;
3321 if (overlay_debugging)
3322 if (section && section_is_overlay (section))
3323 ALL_OBJSECTIONS (objfile, osect)
3324 if (osect->the_bfd_section == section)
3325 return overlay_is_mapped (osect);
3330 /* Function: pc_in_unmapped_range
3331 If PC falls into the lma range of SECTION, return true, else false. */
3334 pc_in_unmapped_range (CORE_ADDR pc, asection *section)
3336 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
3340 if (overlay_debugging)
3341 if (section && section_is_overlay (section))
3343 size = bfd_get_section_size (section);
3344 if (section->lma <= pc && pc < section->lma + size)
3350 /* Function: pc_in_mapped_range
3351 If PC falls into the vma range of SECTION, return true, else false. */
3354 pc_in_mapped_range (CORE_ADDR pc, asection *section)
3356 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3360 if (overlay_debugging)
3361 if (section && section_is_overlay (section))
3363 size = bfd_get_section_size (section);
3364 if (section->vma <= pc && pc < section->vma + size)
3371 /* Return true if the mapped ranges of sections A and B overlap, false
3374 sections_overlap (asection *a, asection *b)
3376 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3378 CORE_ADDR a_start = a->vma;
3379 CORE_ADDR a_end = a->vma + bfd_get_section_size (a);
3380 CORE_ADDR b_start = b->vma;
3381 CORE_ADDR b_end = b->vma + bfd_get_section_size (b);
3383 return (a_start < b_end && b_start < a_end);
3386 /* Function: overlay_unmapped_address (PC, SECTION)
3387 Returns the address corresponding to PC in the unmapped (load) range.
3388 May be the same as PC. */
3391 overlay_unmapped_address (CORE_ADDR pc, asection *section)
3393 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
3395 if (overlay_debugging)
3396 if (section && section_is_overlay (section) &&
3397 pc_in_mapped_range (pc, section))
3398 return pc + section->lma - section->vma;
3403 /* Function: overlay_mapped_address (PC, SECTION)
3404 Returns the address corresponding to PC in the mapped (runtime) range.
3405 May be the same as PC. */
3408 overlay_mapped_address (CORE_ADDR pc, asection *section)
3410 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3412 if (overlay_debugging)
3413 if (section && section_is_overlay (section) &&
3414 pc_in_unmapped_range (pc, section))
3415 return pc + section->vma - section->lma;
3421 /* Function: symbol_overlayed_address
3422 Return one of two addresses (relative to the VMA or to the LMA),
3423 depending on whether the section is mapped or not. */
3426 symbol_overlayed_address (CORE_ADDR address, asection *section)
3428 if (overlay_debugging)
3430 /* If the symbol has no section, just return its regular address. */
3433 /* If the symbol's section is not an overlay, just return its address */
3434 if (!section_is_overlay (section))
3436 /* If the symbol's section is mapped, just return its address */
3437 if (section_is_mapped (section))
3440 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3441 * then return its LOADED address rather than its vma address!!
3443 return overlay_unmapped_address (address, section);
3448 /* Function: find_pc_overlay (PC)
3449 Return the best-match overlay section for PC:
3450 If PC matches a mapped overlay section's VMA, return that section.
3451 Else if PC matches an unmapped section's VMA, return that section.
3452 Else if PC matches an unmapped section's LMA, return that section. */
3455 find_pc_overlay (CORE_ADDR pc)
3457 struct objfile *objfile;
3458 struct obj_section *osect, *best_match = NULL;
3460 if (overlay_debugging)
3461 ALL_OBJSECTIONS (objfile, osect)
3462 if (section_is_overlay (osect->the_bfd_section))
3464 if (pc_in_mapped_range (pc, osect->the_bfd_section))
3466 if (overlay_is_mapped (osect))
3467 return osect->the_bfd_section;
3471 else if (pc_in_unmapped_range (pc, osect->the_bfd_section))
3474 return best_match ? best_match->the_bfd_section : NULL;
3477 /* Function: find_pc_mapped_section (PC)
3478 If PC falls into the VMA address range of an overlay section that is
3479 currently marked as MAPPED, return that section. Else return NULL. */
3482 find_pc_mapped_section (CORE_ADDR pc)
3484 struct objfile *objfile;
3485 struct obj_section *osect;
3487 if (overlay_debugging)
3488 ALL_OBJSECTIONS (objfile, osect)
3489 if (pc_in_mapped_range (pc, osect->the_bfd_section) &&
3490 overlay_is_mapped (osect))
3491 return osect->the_bfd_section;
3496 /* Function: list_overlays_command
3497 Print a list of mapped sections and their PC ranges */
3500 list_overlays_command (char *args, int from_tty)
3503 struct objfile *objfile;
3504 struct obj_section *osect;
3506 if (overlay_debugging)
3507 ALL_OBJSECTIONS (objfile, osect)
3508 if (overlay_is_mapped (osect))
3514 vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section);
3515 lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section);
3516 size = bfd_get_section_size (osect->the_bfd_section);
3517 name = bfd_section_name (objfile->obfd, osect->the_bfd_section);
3519 printf_filtered ("Section %s, loaded at ", name);
3520 deprecated_print_address_numeric (lma, 1, gdb_stdout);
3521 puts_filtered (" - ");
3522 deprecated_print_address_numeric (lma + size, 1, gdb_stdout);
3523 printf_filtered (", mapped at ");
3524 deprecated_print_address_numeric (vma, 1, gdb_stdout);
3525 puts_filtered (" - ");
3526 deprecated_print_address_numeric (vma + size, 1, gdb_stdout);
3527 puts_filtered ("\n");
3532 printf_filtered (_("No sections are mapped.\n"));
3535 /* Function: map_overlay_command
3536 Mark the named section as mapped (ie. residing at its VMA address). */
3539 map_overlay_command (char *args, int from_tty)
3541 struct objfile *objfile, *objfile2;
3542 struct obj_section *sec, *sec2;
3545 if (!overlay_debugging)
3547 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3548 the 'overlay manual' command."));
3550 if (args == 0 || *args == 0)
3551 error (_("Argument required: name of an overlay section"));
3553 /* First, find a section matching the user supplied argument */
3554 ALL_OBJSECTIONS (objfile, sec)
3555 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
3557 /* Now, check to see if the section is an overlay. */
3558 bfdsec = sec->the_bfd_section;
3559 if (!section_is_overlay (bfdsec))
3560 continue; /* not an overlay section */
3562 /* Mark the overlay as "mapped" */
3563 sec->ovly_mapped = 1;
3565 /* Next, make a pass and unmap any sections that are
3566 overlapped by this new section: */
3567 ALL_OBJSECTIONS (objfile2, sec2)
3568 if (sec2->ovly_mapped
3570 && sec->the_bfd_section != sec2->the_bfd_section
3571 && sections_overlap (sec->the_bfd_section,
3572 sec2->the_bfd_section))
3575 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3576 bfd_section_name (objfile->obfd,
3577 sec2->the_bfd_section));
3578 sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2 */
3582 error (_("No overlay section called %s"), args);
3585 /* Function: unmap_overlay_command
3586 Mark the overlay section as unmapped
3587 (ie. resident in its LMA address range, rather than the VMA range). */
3590 unmap_overlay_command (char *args, int from_tty)
3592 struct objfile *objfile;
3593 struct obj_section *sec;
3595 if (!overlay_debugging)
3597 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3598 the 'overlay manual' command."));
3600 if (args == 0 || *args == 0)
3601 error (_("Argument required: name of an overlay section"));
3603 /* First, find a section matching the user supplied argument */
3604 ALL_OBJSECTIONS (objfile, sec)
3605 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
3607 if (!sec->ovly_mapped)
3608 error (_("Section %s is not mapped"), args);
3609 sec->ovly_mapped = 0;
3612 error (_("No overlay section called %s"), args);
3615 /* Function: overlay_auto_command
3616 A utility command to turn on overlay debugging.
3617 Possibly this should be done via a set/show command. */
3620 overlay_auto_command (char *args, int from_tty)
3622 overlay_debugging = ovly_auto;
3623 enable_overlay_breakpoints ();
3625 printf_unfiltered (_("Automatic overlay debugging enabled."));
3628 /* Function: overlay_manual_command
3629 A utility command to turn on overlay debugging.
3630 Possibly this should be done via a set/show command. */
3633 overlay_manual_command (char *args, int from_tty)
3635 overlay_debugging = ovly_on;
3636 disable_overlay_breakpoints ();
3638 printf_unfiltered (_("Overlay debugging enabled."));
3641 /* Function: overlay_off_command
3642 A utility command to turn on overlay debugging.
3643 Possibly this should be done via a set/show command. */
3646 overlay_off_command (char *args, int from_tty)
3648 overlay_debugging = ovly_off;
3649 disable_overlay_breakpoints ();
3651 printf_unfiltered (_("Overlay debugging disabled."));
3655 overlay_load_command (char *args, int from_tty)
3657 if (gdbarch_overlay_update_p (current_gdbarch))
3658 gdbarch_overlay_update (current_gdbarch, NULL);
3660 error (_("This target does not know how to read its overlay state."));
3663 /* Function: overlay_command
3664 A place-holder for a mis-typed command */
3666 /* Command list chain containing all defined "overlay" subcommands. */
3667 struct cmd_list_element *overlaylist;
3670 overlay_command (char *args, int from_tty)
3673 ("\"overlay\" must be followed by the name of an overlay command.\n");
3674 help_list (overlaylist, "overlay ", -1, gdb_stdout);
3678 /* Target Overlays for the "Simplest" overlay manager:
3680 This is GDB's default target overlay layer. It works with the
3681 minimal overlay manager supplied as an example by Cygnus. The
3682 entry point is via a function pointer "gdbarch_overlay_update",
3683 so targets that use a different runtime overlay manager can
3684 substitute their own overlay_update function and take over the
3687 The overlay_update function pokes around in the target's data structures
3688 to see what overlays are mapped, and updates GDB's overlay mapping with
3691 In this simple implementation, the target data structures are as follows:
3692 unsigned _novlys; /# number of overlay sections #/
3693 unsigned _ovly_table[_novlys][4] = {
3694 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3695 {..., ..., ..., ...},
3697 unsigned _novly_regions; /# number of overlay regions #/
3698 unsigned _ovly_region_table[_novly_regions][3] = {
3699 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3702 These functions will attempt to update GDB's mappedness state in the
3703 symbol section table, based on the target's mappedness state.
3705 To do this, we keep a cached copy of the target's _ovly_table, and
3706 attempt to detect when the cached copy is invalidated. The main
3707 entry point is "simple_overlay_update(SECT), which looks up SECT in
3708 the cached table and re-reads only the entry for that section from
3709 the target (whenever possible).
3712 /* Cached, dynamically allocated copies of the target data structures: */
3713 static unsigned (*cache_ovly_table)[4] = 0;
3715 static unsigned (*cache_ovly_region_table)[3] = 0;
3717 static unsigned cache_novlys = 0;
3719 static unsigned cache_novly_regions = 0;
3721 static CORE_ADDR cache_ovly_table_base = 0;
3723 static CORE_ADDR cache_ovly_region_table_base = 0;
3727 VMA, SIZE, LMA, MAPPED
3729 #define TARGET_LONG_BYTES (gdbarch_long_bit (current_gdbarch) \
3732 /* Throw away the cached copy of _ovly_table */
3734 simple_free_overlay_table (void)
3736 if (cache_ovly_table)
3737 xfree (cache_ovly_table);
3739 cache_ovly_table = NULL;
3740 cache_ovly_table_base = 0;
3744 /* Throw away the cached copy of _ovly_region_table */
3746 simple_free_overlay_region_table (void)
3748 if (cache_ovly_region_table)
3749 xfree (cache_ovly_region_table);
3750 cache_novly_regions = 0;
3751 cache_ovly_region_table = NULL;
3752 cache_ovly_region_table_base = 0;
3756 /* Read an array of ints from the target into a local buffer.
3757 Convert to host order. int LEN is number of ints */
3759 read_target_long_array (CORE_ADDR memaddr, unsigned int *myaddr, int len)
3761 /* FIXME (alloca): Not safe if array is very large. */
3762 gdb_byte *buf = alloca (len * TARGET_LONG_BYTES);
3765 read_memory (memaddr, buf, len * TARGET_LONG_BYTES);
3766 for (i = 0; i < len; i++)
3767 myaddr[i] = extract_unsigned_integer (TARGET_LONG_BYTES * i + buf,
3771 /* Find and grab a copy of the target _ovly_table
3772 (and _novlys, which is needed for the table's size) */
3774 simple_read_overlay_table (void)
3776 struct minimal_symbol *novlys_msym, *ovly_table_msym;
3778 simple_free_overlay_table ();
3779 novlys_msym = lookup_minimal_symbol ("_novlys", NULL, NULL);
3782 error (_("Error reading inferior's overlay table: "
3783 "couldn't find `_novlys' variable\n"
3784 "in inferior. Use `overlay manual' mode."));
3788 ovly_table_msym = lookup_minimal_symbol ("_ovly_table", NULL, NULL);
3789 if (! ovly_table_msym)
3791 error (_("Error reading inferior's overlay table: couldn't find "
3792 "`_ovly_table' array\n"
3793 "in inferior. Use `overlay manual' mode."));
3797 cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym), 4);
3799 = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table));
3800 cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (ovly_table_msym);
3801 read_target_long_array (cache_ovly_table_base,
3802 (unsigned int *) cache_ovly_table,
3805 return 1; /* SUCCESS */
3809 /* Find and grab a copy of the target _ovly_region_table
3810 (and _novly_regions, which is needed for the table's size) */
3812 simple_read_overlay_region_table (void)
3814 struct minimal_symbol *msym;
3816 simple_free_overlay_region_table ();
3817 msym = lookup_minimal_symbol ("_novly_regions", NULL, NULL);
3819 cache_novly_regions = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4);
3821 return 0; /* failure */
3822 cache_ovly_region_table = (void *) xmalloc (cache_novly_regions * 12);
3823 if (cache_ovly_region_table != NULL)
3825 msym = lookup_minimal_symbol ("_ovly_region_table", NULL, NULL);
3828 cache_ovly_region_table_base = SYMBOL_VALUE_ADDRESS (msym);
3829 read_target_long_array (cache_ovly_region_table_base,
3830 (unsigned int *) cache_ovly_region_table,
3831 cache_novly_regions * 3);
3834 return 0; /* failure */
3837 return 0; /* failure */
3838 return 1; /* SUCCESS */
3842 /* Function: simple_overlay_update_1
3843 A helper function for simple_overlay_update. Assuming a cached copy
3844 of _ovly_table exists, look through it to find an entry whose vma,
3845 lma and size match those of OSECT. Re-read the entry and make sure
3846 it still matches OSECT (else the table may no longer be valid).
3847 Set OSECT's mapped state to match the entry. Return: 1 for
3848 success, 0 for failure. */
3851 simple_overlay_update_1 (struct obj_section *osect)
3854 bfd *obfd = osect->objfile->obfd;
3855 asection *bsect = osect->the_bfd_section;
3857 size = bfd_get_section_size (osect->the_bfd_section);
3858 for (i = 0; i < cache_novlys; i++)
3859 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3860 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3861 /* && cache_ovly_table[i][SIZE] == size */ )
3863 read_target_long_array (cache_ovly_table_base + i * TARGET_LONG_BYTES,
3864 (unsigned int *) cache_ovly_table[i], 4);
3865 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3866 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3867 /* && cache_ovly_table[i][SIZE] == size */ )
3869 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3872 else /* Warning! Warning! Target's ovly table has changed! */
3878 /* Function: simple_overlay_update
3879 If OSECT is NULL, then update all sections' mapped state
3880 (after re-reading the entire target _ovly_table).
3881 If OSECT is non-NULL, then try to find a matching entry in the
3882 cached ovly_table and update only OSECT's mapped state.
3883 If a cached entry can't be found or the cache isn't valid, then
3884 re-read the entire cache, and go ahead and update all sections. */
3887 simple_overlay_update (struct obj_section *osect)
3889 struct objfile *objfile;
3891 /* Were we given an osect to look up? NULL means do all of them. */
3893 /* Have we got a cached copy of the target's overlay table? */
3894 if (cache_ovly_table != NULL)
3895 /* Does its cached location match what's currently in the symtab? */
3896 if (cache_ovly_table_base ==
3897 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL, NULL)))
3898 /* Then go ahead and try to look up this single section in the cache */
3899 if (simple_overlay_update_1 (osect))
3900 /* Found it! We're done. */
3903 /* Cached table no good: need to read the entire table anew.
3904 Or else we want all the sections, in which case it's actually
3905 more efficient to read the whole table in one block anyway. */
3907 if (! simple_read_overlay_table ())
3910 /* Now may as well update all sections, even if only one was requested. */
3911 ALL_OBJSECTIONS (objfile, osect)
3912 if (section_is_overlay (osect->the_bfd_section))
3915 bfd *obfd = osect->objfile->obfd;
3916 asection *bsect = osect->the_bfd_section;
3918 size = bfd_get_section_size (bsect);
3919 for (i = 0; i < cache_novlys; i++)
3920 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3921 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3922 /* && cache_ovly_table[i][SIZE] == size */ )
3923 { /* obj_section matches i'th entry in ovly_table */
3924 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3925 break; /* finished with inner for loop: break out */
3930 /* Set the output sections and output offsets for section SECTP in
3931 ABFD. The relocation code in BFD will read these offsets, so we
3932 need to be sure they're initialized. We map each section to itself,
3933 with no offset; this means that SECTP->vma will be honored. */
3936 symfile_dummy_outputs (bfd *abfd, asection *sectp, void *dummy)
3938 sectp->output_section = sectp;
3939 sectp->output_offset = 0;
3942 /* Relocate the contents of a debug section SECTP in ABFD. The
3943 contents are stored in BUF if it is non-NULL, or returned in a
3944 malloc'd buffer otherwise.
3946 For some platforms and debug info formats, shared libraries contain
3947 relocations against the debug sections (particularly for DWARF-2;
3948 one affected platform is PowerPC GNU/Linux, although it depends on
3949 the version of the linker in use). Also, ELF object files naturally
3950 have unresolved relocations for their debug sections. We need to apply
3951 the relocations in order to get the locations of symbols correct. */
3954 symfile_relocate_debug_section (bfd *abfd, asection *sectp, bfd_byte *buf)
3956 /* We're only interested in debugging sections with relocation
3958 if ((sectp->flags & SEC_RELOC) == 0)
3960 if ((sectp->flags & SEC_DEBUGGING) == 0)
3963 /* We will handle section offsets properly elsewhere, so relocate as if
3964 all sections begin at 0. */
3965 bfd_map_over_sections (abfd, symfile_dummy_outputs, NULL);
3967 return bfd_simple_get_relocated_section_contents (abfd, sectp, buf, NULL);
3970 struct symfile_segment_data *
3971 get_symfile_segment_data (bfd *abfd)
3973 struct sym_fns *sf = find_sym_fns (abfd);
3978 return sf->sym_segments (abfd);
3982 free_symfile_segment_data (struct symfile_segment_data *data)
3984 xfree (data->segment_bases);
3985 xfree (data->segment_sizes);
3986 xfree (data->segment_info);
3991 symfile_map_offsets_to_segments (bfd *abfd, struct symfile_segment_data *data,
3992 struct section_offsets *offsets,
3993 int num_segment_bases,
3994 const CORE_ADDR *segment_bases)
3999 /* If we do not have segment mappings for the object file, we
4000 can not relocate it by segments. */
4001 gdb_assert (data != NULL);
4002 gdb_assert (data->num_segments > 0);
4004 /* If more offsets are provided than we have segments, make sure the
4005 excess offsets are all the same as the last segment's offset.
4006 This allows "Text=X;Data=X" for files which have only a single
4008 if (num_segment_bases > data->num_segments)
4009 for (i = data->num_segments; i < num_segment_bases; i++)
4010 if (segment_bases[i] != segment_bases[data->num_segments - 1])
4013 for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next)
4016 int which = data->segment_info[i];
4018 if (which > num_segment_bases)
4019 offsets->offsets[i] = segment_bases[num_segment_bases - 1];
4021 offsets->offsets[i] = segment_bases[which - 1];
4025 offsets->offsets[i] -= data->segment_bases[which - 1];
4032 symfile_find_segment_sections (struct objfile *objfile)
4034 bfd *abfd = objfile->obfd;
4037 struct symfile_segment_data *data;
4039 data = get_symfile_segment_data (objfile->obfd);
4043 if (data->num_segments != 1 && data->num_segments != 2)
4045 free_symfile_segment_data (data);
4049 for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next)
4052 int which = data->segment_info[i];
4056 if (objfile->sect_index_text == -1)
4057 objfile->sect_index_text = sect->index;
4059 if (objfile->sect_index_rodata == -1)
4060 objfile->sect_index_rodata = sect->index;
4062 else if (which == 2)
4064 if (objfile->sect_index_data == -1)
4065 objfile->sect_index_data = sect->index;
4067 if (objfile->sect_index_bss == -1)
4068 objfile->sect_index_bss = sect->index;
4072 free_symfile_segment_data (data);
4076 _initialize_symfile (void)
4078 struct cmd_list_element *c;
4080 c = add_cmd ("symbol-file", class_files, symbol_file_command, _("\
4081 Load symbol table from executable file FILE.\n\
4082 The `file' command can also load symbol tables, as well as setting the file\n\
4083 to execute."), &cmdlist);
4084 set_cmd_completer (c, filename_completer);
4086 c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command, _("\
4087 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
4088 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
4089 ADDR is the starting address of the file's text.\n\
4090 The optional arguments are section-name section-address pairs and\n\
4091 should be specified if the data and bss segments are not contiguous\n\
4092 with the text. SECT is a section name to be loaded at SECT_ADDR."),
4094 set_cmd_completer (c, filename_completer);
4096 c = add_cmd ("add-shared-symbol-files", class_files,
4097 add_shared_symbol_files_command, _("\
4098 Load the symbols from shared objects in the dynamic linker's link map."),
4100 c = add_alias_cmd ("assf", "add-shared-symbol-files", class_files, 1,
4103 c = add_cmd ("load", class_files, load_command, _("\
4104 Dynamically load FILE into the running program, and record its symbols\n\
4105 for access from GDB.\n\
4106 A load OFFSET may also be given."), &cmdlist);
4107 set_cmd_completer (c, filename_completer);
4109 add_setshow_boolean_cmd ("symbol-reloading", class_support,
4110 &symbol_reloading, _("\
4111 Set dynamic symbol table reloading multiple times in one run."), _("\
4112 Show dynamic symbol table reloading multiple times in one run."), NULL,
4114 show_symbol_reloading,
4115 &setlist, &showlist);
4117 add_prefix_cmd ("overlay", class_support, overlay_command,
4118 _("Commands for debugging overlays."), &overlaylist,
4119 "overlay ", 0, &cmdlist);
4121 add_com_alias ("ovly", "overlay", class_alias, 1);
4122 add_com_alias ("ov", "overlay", class_alias, 1);
4124 add_cmd ("map-overlay", class_support, map_overlay_command,
4125 _("Assert that an overlay section is mapped."), &overlaylist);
4127 add_cmd ("unmap-overlay", class_support, unmap_overlay_command,
4128 _("Assert that an overlay section is unmapped."), &overlaylist);
4130 add_cmd ("list-overlays", class_support, list_overlays_command,
4131 _("List mappings of overlay sections."), &overlaylist);
4133 add_cmd ("manual", class_support, overlay_manual_command,
4134 _("Enable overlay debugging."), &overlaylist);
4135 add_cmd ("off", class_support, overlay_off_command,
4136 _("Disable overlay debugging."), &overlaylist);
4137 add_cmd ("auto", class_support, overlay_auto_command,
4138 _("Enable automatic overlay debugging."), &overlaylist);
4139 add_cmd ("load-target", class_support, overlay_load_command,
4140 _("Read the overlay mapping state from the target."), &overlaylist);
4142 /* Filename extension to source language lookup table: */
4143 init_filename_language_table ();
4144 add_setshow_string_noescape_cmd ("extension-language", class_files,
4146 Set mapping between filename extension and source language."), _("\
4147 Show mapping between filename extension and source language."), _("\
4148 Usage: set extension-language .foo bar"),
4149 set_ext_lang_command,
4151 &setlist, &showlist);
4153 add_info ("extensions", info_ext_lang_command,
4154 _("All filename extensions associated with a source language."));
4156 add_setshow_optional_filename_cmd ("debug-file-directory", class_support,
4157 &debug_file_directory, _("\
4158 Set the directory where separate debug symbols are searched for."), _("\
4159 Show the directory where separate debug symbols are searched for."), _("\
4160 Separate debug symbols are first searched for in the same\n\
4161 directory as the binary, then in the `" DEBUG_SUBDIRECTORY "' subdirectory,\n\
4162 and lastly at the path of the directory of the binary with\n\
4163 the global debug-file directory prepended."),
4165 show_debug_file_directory,
4166 &setlist, &showlist);