1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
5 Free Software Foundation, Inc.
7 Contributed by Cygnus Support, using pieces from other GDB modules.
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>. */
25 #include "arch-utils.h"
37 #include "breakpoint.h"
39 #include "complaints.h"
43 #include "filenames.h" /* for DOSish file names */
44 #include "gdb-stabs.h"
45 #include "gdb_obstack.h"
46 #include "completer.h"
49 #include "readline/readline.h"
50 #include "gdb_assert.h"
54 #include "parser-defs.h"
60 #include <sys/types.h>
62 #include "gdb_string.h"
70 int (*deprecated_ui_load_progress_hook) (const char *section,
72 void (*deprecated_show_load_progress) (const char *section,
73 unsigned long section_sent,
74 unsigned long section_size,
75 unsigned long total_sent,
76 unsigned long total_size);
77 void (*deprecated_pre_add_symbol_hook) (const char *);
78 void (*deprecated_post_add_symbol_hook) (void);
80 static void clear_symtab_users_cleanup (void *ignore);
82 /* Global variables owned by this file. */
83 int readnow_symbol_files; /* Read full symbols immediately. */
85 /* External variables and functions referenced. */
87 extern void report_transfer_performance (unsigned long, time_t, time_t);
89 /* Functions this file defines. */
91 static void load_command (char *, int);
93 static void symbol_file_add_main_1 (char *args, int from_tty, int flags);
95 static void add_symbol_file_command (char *, int);
97 bfd *symfile_bfd_open (char *);
99 int get_section_index (struct objfile *, char *);
101 static const struct sym_fns *find_sym_fns (bfd *);
103 static void decrement_reading_symtab (void *);
105 static void overlay_invalidate_all (void);
107 void list_overlays_command (char *, int);
109 void map_overlay_command (char *, int);
111 void unmap_overlay_command (char *, int);
113 static void overlay_auto_command (char *, int);
115 static void overlay_manual_command (char *, int);
117 static void overlay_off_command (char *, int);
119 static void overlay_load_command (char *, int);
121 static void overlay_command (char *, int);
123 static void simple_free_overlay_table (void);
125 static void read_target_long_array (CORE_ADDR, unsigned int *, int, int,
128 static int simple_read_overlay_table (void);
130 static int simple_overlay_update_1 (struct obj_section *);
132 static void add_filename_language (char *ext, enum language lang);
134 static void info_ext_lang_command (char *args, int from_tty);
136 static void init_filename_language_table (void);
138 static void symfile_find_segment_sections (struct objfile *objfile);
140 void _initialize_symfile (void);
142 /* List of all available sym_fns. On gdb startup, each object file reader
143 calls add_symtab_fns() to register information on each format it is
146 typedef const struct sym_fns *sym_fns_ptr;
147 DEF_VEC_P (sym_fns_ptr);
149 static VEC (sym_fns_ptr) *symtab_fns = NULL;
151 /* Flag for whether user will be reloading symbols multiple times.
152 Defaults to ON for VxWorks, otherwise OFF. */
154 #ifdef SYMBOL_RELOADING_DEFAULT
155 int symbol_reloading = SYMBOL_RELOADING_DEFAULT;
157 int symbol_reloading = 0;
160 show_symbol_reloading (struct ui_file *file, int from_tty,
161 struct cmd_list_element *c, const char *value)
163 fprintf_filtered (file, _("Dynamic symbol table reloading "
164 "multiple times in one run is %s.\n"),
168 /* If non-zero, shared library symbols will be added automatically
169 when the inferior is created, new libraries are loaded, or when
170 attaching to the inferior. This is almost always what users will
171 want to have happen; but for very large programs, the startup time
172 will be excessive, and so if this is a problem, the user can clear
173 this flag and then add the shared library symbols as needed. Note
174 that there is a potential for confusion, since if the shared
175 library symbols are not loaded, commands like "info fun" will *not*
176 report all the functions that are actually present. */
178 int auto_solib_add = 1;
181 /* Make a null terminated copy of the string at PTR with SIZE characters in
182 the obstack pointed to by OBSTACKP . Returns the address of the copy.
183 Note that the string at PTR does not have to be null terminated, I.e. it
184 may be part of a larger string and we are only saving a substring. */
187 obsavestring (const char *ptr, int size, struct obstack *obstackp)
189 char *p = (char *) obstack_alloc (obstackp, size + 1);
190 /* Open-coded memcpy--saves function call time. These strings are usually
191 short. FIXME: Is this really still true with a compiler that can
194 const char *p1 = ptr;
196 const char *end = ptr + size;
205 /* Concatenate NULL terminated variable argument list of `const char *'
206 strings; return the new string. Space is found in the OBSTACKP.
207 Argument list must be terminated by a sentinel expression `(char *)
211 obconcat (struct obstack *obstackp, ...)
215 va_start (ap, obstackp);
218 const char *s = va_arg (ap, const char *);
223 obstack_grow_str (obstackp, s);
226 obstack_1grow (obstackp, 0);
228 return obstack_finish (obstackp);
231 /* True if we are reading a symbol table. */
233 int currently_reading_symtab = 0;
236 decrement_reading_symtab (void *dummy)
238 currently_reading_symtab--;
241 /* Increment currently_reading_symtab and return a cleanup that can be
242 used to decrement it. */
244 increment_reading_symtab (void)
246 ++currently_reading_symtab;
247 return make_cleanup (decrement_reading_symtab, NULL);
250 /* Remember the lowest-addressed loadable section we've seen.
251 This function is called via bfd_map_over_sections.
253 In case of equal vmas, the section with the largest size becomes the
254 lowest-addressed loadable section.
256 If the vmas and sizes are equal, the last section is considered the
257 lowest-addressed loadable section. */
260 find_lowest_section (bfd *abfd, asection *sect, void *obj)
262 asection **lowest = (asection **) obj;
264 if (0 == (bfd_get_section_flags (abfd, sect) & (SEC_ALLOC | SEC_LOAD)))
267 *lowest = sect; /* First loadable section */
268 else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect))
269 *lowest = sect; /* A lower loadable section */
270 else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect)
271 && (bfd_section_size (abfd, (*lowest))
272 <= bfd_section_size (abfd, sect)))
276 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
278 struct section_addr_info *
279 alloc_section_addr_info (size_t num_sections)
281 struct section_addr_info *sap;
284 size = (sizeof (struct section_addr_info)
285 + sizeof (struct other_sections) * (num_sections - 1));
286 sap = (struct section_addr_info *) xmalloc (size);
287 memset (sap, 0, size);
288 sap->num_sections = num_sections;
293 /* Build (allocate and populate) a section_addr_info struct from
294 an existing section table. */
296 extern struct section_addr_info *
297 build_section_addr_info_from_section_table (const struct target_section *start,
298 const struct target_section *end)
300 struct section_addr_info *sap;
301 const struct target_section *stp;
304 sap = alloc_section_addr_info (end - start);
306 for (stp = start, oidx = 0; stp != end; stp++)
308 if (bfd_get_section_flags (stp->bfd,
309 stp->the_bfd_section) & (SEC_ALLOC | SEC_LOAD)
310 && oidx < end - start)
312 sap->other[oidx].addr = stp->addr;
313 sap->other[oidx].name
314 = xstrdup (bfd_section_name (stp->bfd, stp->the_bfd_section));
315 sap->other[oidx].sectindex = stp->the_bfd_section->index;
323 /* Create a section_addr_info from section offsets in ABFD. */
325 static struct section_addr_info *
326 build_section_addr_info_from_bfd (bfd *abfd)
328 struct section_addr_info *sap;
330 struct bfd_section *sec;
332 sap = alloc_section_addr_info (bfd_count_sections (abfd));
333 for (i = 0, sec = abfd->sections; sec != NULL; sec = sec->next)
334 if (bfd_get_section_flags (abfd, sec) & (SEC_ALLOC | SEC_LOAD))
336 sap->other[i].addr = bfd_get_section_vma (abfd, sec);
337 sap->other[i].name = xstrdup (bfd_get_section_name (abfd, sec));
338 sap->other[i].sectindex = sec->index;
344 /* Create a section_addr_info from section offsets in OBJFILE. */
346 struct section_addr_info *
347 build_section_addr_info_from_objfile (const struct objfile *objfile)
349 struct section_addr_info *sap;
352 /* Before reread_symbols gets rewritten it is not safe to call:
353 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
355 sap = build_section_addr_info_from_bfd (objfile->obfd);
356 for (i = 0; i < sap->num_sections && sap->other[i].name; i++)
358 int sectindex = sap->other[i].sectindex;
360 sap->other[i].addr += objfile->section_offsets->offsets[sectindex];
365 /* Free all memory allocated by build_section_addr_info_from_section_table. */
368 free_section_addr_info (struct section_addr_info *sap)
372 for (idx = 0; idx < sap->num_sections; idx++)
373 if (sap->other[idx].name)
374 xfree (sap->other[idx].name);
379 /* Initialize OBJFILE's sect_index_* members. */
381 init_objfile_sect_indices (struct objfile *objfile)
386 sect = bfd_get_section_by_name (objfile->obfd, ".text");
388 objfile->sect_index_text = sect->index;
390 sect = bfd_get_section_by_name (objfile->obfd, ".data");
392 objfile->sect_index_data = sect->index;
394 sect = bfd_get_section_by_name (objfile->obfd, ".bss");
396 objfile->sect_index_bss = sect->index;
398 sect = bfd_get_section_by_name (objfile->obfd, ".rodata");
400 objfile->sect_index_rodata = sect->index;
402 /* This is where things get really weird... We MUST have valid
403 indices for the various sect_index_* members or gdb will abort.
404 So if for example, there is no ".text" section, we have to
405 accomodate that. First, check for a file with the standard
406 one or two segments. */
408 symfile_find_segment_sections (objfile);
410 /* Except when explicitly adding symbol files at some address,
411 section_offsets contains nothing but zeros, so it doesn't matter
412 which slot in section_offsets the individual sect_index_* members
413 index into. So if they are all zero, it is safe to just point
414 all the currently uninitialized indices to the first slot. But
415 beware: if this is the main executable, it may be relocated
416 later, e.g. by the remote qOffsets packet, and then this will
417 be wrong! That's why we try segments first. */
419 for (i = 0; i < objfile->num_sections; i++)
421 if (ANOFFSET (objfile->section_offsets, i) != 0)
426 if (i == objfile->num_sections)
428 if (objfile->sect_index_text == -1)
429 objfile->sect_index_text = 0;
430 if (objfile->sect_index_data == -1)
431 objfile->sect_index_data = 0;
432 if (objfile->sect_index_bss == -1)
433 objfile->sect_index_bss = 0;
434 if (objfile->sect_index_rodata == -1)
435 objfile->sect_index_rodata = 0;
439 /* The arguments to place_section. */
441 struct place_section_arg
443 struct section_offsets *offsets;
447 /* Find a unique offset to use for loadable section SECT if
448 the user did not provide an offset. */
451 place_section (bfd *abfd, asection *sect, void *obj)
453 struct place_section_arg *arg = obj;
454 CORE_ADDR *offsets = arg->offsets->offsets, start_addr;
456 ULONGEST align = ((ULONGEST) 1) << bfd_get_section_alignment (abfd, sect);
458 /* We are only interested in allocated sections. */
459 if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0)
462 /* If the user specified an offset, honor it. */
463 if (offsets[sect->index] != 0)
466 /* Otherwise, let's try to find a place for the section. */
467 start_addr = (arg->lowest + align - 1) & -align;
474 for (cur_sec = abfd->sections; cur_sec != NULL; cur_sec = cur_sec->next)
476 int indx = cur_sec->index;
478 /* We don't need to compare against ourself. */
482 /* We can only conflict with allocated sections. */
483 if ((bfd_get_section_flags (abfd, cur_sec) & SEC_ALLOC) == 0)
486 /* If the section offset is 0, either the section has not been placed
487 yet, or it was the lowest section placed (in which case LOWEST
488 will be past its end). */
489 if (offsets[indx] == 0)
492 /* If this section would overlap us, then we must move up. */
493 if (start_addr + bfd_get_section_size (sect) > offsets[indx]
494 && start_addr < offsets[indx] + bfd_get_section_size (cur_sec))
496 start_addr = offsets[indx] + bfd_get_section_size (cur_sec);
497 start_addr = (start_addr + align - 1) & -align;
502 /* Otherwise, we appear to be OK. So far. */
507 offsets[sect->index] = start_addr;
508 arg->lowest = start_addr + bfd_get_section_size (sect);
511 /* Store struct section_addr_info as prepared (made relative and with SECTINDEX
512 filled-in) by addr_info_make_relative into SECTION_OFFSETS of NUM_SECTIONS
516 relative_addr_info_to_section_offsets (struct section_offsets *section_offsets,
518 struct section_addr_info *addrs)
522 memset (section_offsets, 0, SIZEOF_N_SECTION_OFFSETS (num_sections));
524 /* Now calculate offsets for section that were specified by the caller. */
525 for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++)
527 struct other_sections *osp;
529 osp = &addrs->other[i];
533 /* Record all sections in offsets. */
534 /* The section_offsets in the objfile are here filled in using
536 section_offsets->offsets[osp->sectindex] = osp->addr;
540 /* Transform section name S for a name comparison. prelink can split section
541 `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly
542 prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address
543 of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss'
544 (`.sbss') section has invalid (increased) virtual address. */
547 addr_section_name (const char *s)
549 if (strcmp (s, ".dynbss") == 0)
551 if (strcmp (s, ".sdynbss") == 0)
557 /* qsort comparator for addrs_section_sort. Sort entries in ascending order by
558 their (name, sectindex) pair. sectindex makes the sort by name stable. */
561 addrs_section_compar (const void *ap, const void *bp)
563 const struct other_sections *a = *((struct other_sections **) ap);
564 const struct other_sections *b = *((struct other_sections **) bp);
565 int retval, a_idx, b_idx;
567 retval = strcmp (addr_section_name (a->name), addr_section_name (b->name));
571 /* SECTINDEX is undefined iff ADDR is zero. */
572 a_idx = a->addr == 0 ? 0 : a->sectindex;
573 b_idx = b->addr == 0 ? 0 : b->sectindex;
574 return a_idx - b_idx;
577 /* Provide sorted array of pointers to sections of ADDRS. The array is
578 terminated by NULL. Caller is responsible to call xfree for it. */
580 static struct other_sections **
581 addrs_section_sort (struct section_addr_info *addrs)
583 struct other_sections **array;
586 /* `+ 1' for the NULL terminator. */
587 array = xmalloc (sizeof (*array) * (addrs->num_sections + 1));
588 for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++)
589 array[i] = &addrs->other[i];
592 qsort (array, i, sizeof (*array), addrs_section_compar);
597 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
598 also SECTINDEXes specific to ABFD there. This function can be used to
599 rebase ADDRS to start referencing different BFD than before. */
602 addr_info_make_relative (struct section_addr_info *addrs, bfd *abfd)
604 asection *lower_sect;
605 CORE_ADDR lower_offset;
607 struct cleanup *my_cleanup;
608 struct section_addr_info *abfd_addrs;
609 struct other_sections **addrs_sorted, **abfd_addrs_sorted;
610 struct other_sections **addrs_to_abfd_addrs;
612 /* Find lowest loadable section to be used as starting point for
613 continguous sections. */
615 bfd_map_over_sections (abfd, find_lowest_section, &lower_sect);
616 if (lower_sect == NULL)
618 warning (_("no loadable sections found in added symbol-file %s"),
619 bfd_get_filename (abfd));
623 lower_offset = bfd_section_vma (bfd_get_filename (abfd), lower_sect);
625 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
626 in ABFD. Section names are not unique - there can be multiple sections of
627 the same name. Also the sections of the same name do not have to be
628 adjacent to each other. Some sections may be present only in one of the
629 files. Even sections present in both files do not have to be in the same
632 Use stable sort by name for the sections in both files. Then linearly
633 scan both lists matching as most of the entries as possible. */
635 addrs_sorted = addrs_section_sort (addrs);
636 my_cleanup = make_cleanup (xfree, addrs_sorted);
638 abfd_addrs = build_section_addr_info_from_bfd (abfd);
639 make_cleanup_free_section_addr_info (abfd_addrs);
640 abfd_addrs_sorted = addrs_section_sort (abfd_addrs);
641 make_cleanup (xfree, abfd_addrs_sorted);
643 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and
644 ABFD_ADDRS_SORTED. */
646 addrs_to_abfd_addrs = xzalloc (sizeof (*addrs_to_abfd_addrs)
647 * addrs->num_sections);
648 make_cleanup (xfree, addrs_to_abfd_addrs);
650 while (*addrs_sorted)
652 const char *sect_name = addr_section_name ((*addrs_sorted)->name);
654 while (*abfd_addrs_sorted
655 && strcmp (addr_section_name ((*abfd_addrs_sorted)->name),
659 if (*abfd_addrs_sorted
660 && strcmp (addr_section_name ((*abfd_addrs_sorted)->name),
665 /* Make the found item directly addressable from ADDRS. */
666 index_in_addrs = *addrs_sorted - addrs->other;
667 gdb_assert (addrs_to_abfd_addrs[index_in_addrs] == NULL);
668 addrs_to_abfd_addrs[index_in_addrs] = *abfd_addrs_sorted;
670 /* Never use the same ABFD entry twice. */
677 /* Calculate offsets for the loadable sections.
678 FIXME! Sections must be in order of increasing loadable section
679 so that contiguous sections can use the lower-offset!!!
681 Adjust offsets if the segments are not contiguous.
682 If the section is contiguous, its offset should be set to
683 the offset of the highest loadable section lower than it
684 (the loadable section directly below it in memory).
685 this_offset = lower_offset = lower_addr - lower_orig_addr */
687 for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++)
689 struct other_sections *sect = addrs_to_abfd_addrs[i];
693 /* This is the index used by BFD. */
694 addrs->other[i].sectindex = sect->sectindex;
696 if (addrs->other[i].addr != 0)
698 addrs->other[i].addr -= sect->addr;
699 lower_offset = addrs->other[i].addr;
702 addrs->other[i].addr = lower_offset;
706 /* addr_section_name transformation is not used for SECT_NAME. */
707 const char *sect_name = addrs->other[i].name;
709 /* This section does not exist in ABFD, which is normally
710 unexpected and we want to issue a warning.
712 However, the ELF prelinker does create a few sections which are
713 marked in the main executable as loadable (they are loaded in
714 memory from the DYNAMIC segment) and yet are not present in
715 separate debug info files. This is fine, and should not cause
716 a warning. Shared libraries contain just the section
717 ".gnu.liblist" but it is not marked as loadable there. There is
718 no other way to identify them than by their name as the sections
719 created by prelink have no special flags.
721 For the sections `.bss' and `.sbss' see addr_section_name. */
723 if (!(strcmp (sect_name, ".gnu.liblist") == 0
724 || strcmp (sect_name, ".gnu.conflict") == 0
725 || (strcmp (sect_name, ".bss") == 0
727 && strcmp (addrs->other[i - 1].name, ".dynbss") == 0
728 && addrs_to_abfd_addrs[i - 1] != NULL)
729 || (strcmp (sect_name, ".sbss") == 0
731 && strcmp (addrs->other[i - 1].name, ".sdynbss") == 0
732 && addrs_to_abfd_addrs[i - 1] != NULL)))
733 warning (_("section %s not found in %s"), sect_name,
734 bfd_get_filename (abfd));
736 addrs->other[i].addr = 0;
738 /* SECTINDEX is invalid if ADDR is zero. */
742 do_cleanups (my_cleanup);
745 /* Parse the user's idea of an offset for dynamic linking, into our idea
746 of how to represent it for fast symbol reading. This is the default
747 version of the sym_fns.sym_offsets function for symbol readers that
748 don't need to do anything special. It allocates a section_offsets table
749 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
752 default_symfile_offsets (struct objfile *objfile,
753 struct section_addr_info *addrs)
755 objfile->num_sections = bfd_count_sections (objfile->obfd);
756 objfile->section_offsets = (struct section_offsets *)
757 obstack_alloc (&objfile->objfile_obstack,
758 SIZEOF_N_SECTION_OFFSETS (objfile->num_sections));
759 relative_addr_info_to_section_offsets (objfile->section_offsets,
760 objfile->num_sections, addrs);
762 /* For relocatable files, all loadable sections will start at zero.
763 The zero is meaningless, so try to pick arbitrary addresses such
764 that no loadable sections overlap. This algorithm is quadratic,
765 but the number of sections in a single object file is generally
767 if ((bfd_get_file_flags (objfile->obfd) & (EXEC_P | DYNAMIC)) == 0)
769 struct place_section_arg arg;
770 bfd *abfd = objfile->obfd;
773 for (cur_sec = abfd->sections; cur_sec != NULL; cur_sec = cur_sec->next)
774 /* We do not expect this to happen; just skip this step if the
775 relocatable file has a section with an assigned VMA. */
776 if (bfd_section_vma (abfd, cur_sec) != 0)
781 CORE_ADDR *offsets = objfile->section_offsets->offsets;
783 /* Pick non-overlapping offsets for sections the user did not
785 arg.offsets = objfile->section_offsets;
787 bfd_map_over_sections (objfile->obfd, place_section, &arg);
789 /* Correctly filling in the section offsets is not quite
790 enough. Relocatable files have two properties that
791 (most) shared objects do not:
793 - Their debug information will contain relocations. Some
794 shared libraries do also, but many do not, so this can not
797 - If there are multiple code sections they will be loaded
798 at different relative addresses in memory than they are
799 in the objfile, since all sections in the file will start
802 Because GDB has very limited ability to map from an
803 address in debug info to the correct code section,
804 it relies on adding SECT_OFF_TEXT to things which might be
805 code. If we clear all the section offsets, and set the
806 section VMAs instead, then symfile_relocate_debug_section
807 will return meaningful debug information pointing at the
810 GDB has too many different data structures for section
811 addresses - a bfd, objfile, and so_list all have section
812 tables, as does exec_ops. Some of these could probably
815 for (cur_sec = abfd->sections; cur_sec != NULL;
816 cur_sec = cur_sec->next)
818 if ((bfd_get_section_flags (abfd, cur_sec) & SEC_ALLOC) == 0)
821 bfd_set_section_vma (abfd, cur_sec, offsets[cur_sec->index]);
822 exec_set_section_address (bfd_get_filename (abfd),
824 offsets[cur_sec->index]);
825 offsets[cur_sec->index] = 0;
830 /* Remember the bfd indexes for the .text, .data, .bss and
832 init_objfile_sect_indices (objfile);
836 /* Divide the file into segments, which are individual relocatable units.
837 This is the default version of the sym_fns.sym_segments function for
838 symbol readers that do not have an explicit representation of segments.
839 It assumes that object files do not have segments, and fully linked
840 files have a single segment. */
842 struct symfile_segment_data *
843 default_symfile_segments (bfd *abfd)
847 struct symfile_segment_data *data;
850 /* Relocatable files contain enough information to position each
851 loadable section independently; they should not be relocated
853 if ((bfd_get_file_flags (abfd) & (EXEC_P | DYNAMIC)) == 0)
856 /* Make sure there is at least one loadable section in the file. */
857 for (sect = abfd->sections; sect != NULL; sect = sect->next)
859 if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0)
867 low = bfd_get_section_vma (abfd, sect);
868 high = low + bfd_get_section_size (sect);
870 data = XZALLOC (struct symfile_segment_data);
871 data->num_segments = 1;
872 data->segment_bases = XCALLOC (1, CORE_ADDR);
873 data->segment_sizes = XCALLOC (1, CORE_ADDR);
875 num_sections = bfd_count_sections (abfd);
876 data->segment_info = XCALLOC (num_sections, int);
878 for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next)
882 if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0)
885 vma = bfd_get_section_vma (abfd, sect);
888 if (vma + bfd_get_section_size (sect) > high)
889 high = vma + bfd_get_section_size (sect);
891 data->segment_info[i] = 1;
894 data->segment_bases[0] = low;
895 data->segment_sizes[0] = high - low;
900 /* Process a symbol file, as either the main file or as a dynamically
903 OBJFILE is where the symbols are to be read from.
905 ADDRS is the list of section load addresses. If the user has given
906 an 'add-symbol-file' command, then this is the list of offsets and
907 addresses he or she provided as arguments to the command; or, if
908 we're handling a shared library, these are the actual addresses the
909 sections are loaded at, according to the inferior's dynamic linker
910 (as gleaned by GDB's shared library code). We convert each address
911 into an offset from the section VMA's as it appears in the object
912 file, and then call the file's sym_offsets function to convert this
913 into a format-specific offset table --- a `struct section_offsets'.
914 If ADDRS is non-zero, OFFSETS must be zero.
916 OFFSETS is a table of section offsets already in the right
917 format-specific representation. NUM_OFFSETS is the number of
918 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
919 assume this is the proper table the call to sym_offsets described
920 above would produce. Instead of calling sym_offsets, we just dump
921 it right into objfile->section_offsets. (When we're re-reading
922 symbols from an objfile, we don't have the original load address
923 list any more; all we have is the section offset table.) If
924 OFFSETS is non-zero, ADDRS must be zero.
926 ADD_FLAGS encodes verbosity level, whether this is main symbol or
927 an extra symbol file such as dynamically loaded code, and wether
928 breakpoint reset should be deferred. */
931 syms_from_objfile (struct objfile *objfile,
932 struct section_addr_info *addrs,
933 struct section_offsets *offsets,
937 struct section_addr_info *local_addr = NULL;
938 struct cleanup *old_chain;
939 const int mainline = add_flags & SYMFILE_MAINLINE;
941 gdb_assert (! (addrs && offsets));
943 init_entry_point_info (objfile);
944 objfile->sf = find_sym_fns (objfile->obfd);
946 if (objfile->sf == NULL)
947 return; /* No symbols. */
949 /* Make sure that partially constructed symbol tables will be cleaned up
950 if an error occurs during symbol reading. */
951 old_chain = make_cleanup_free_objfile (objfile);
953 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
954 list. We now establish the convention that an addr of zero means
955 no load address was specified. */
956 if (! addrs && ! offsets)
959 = alloc_section_addr_info (bfd_count_sections (objfile->obfd));
960 make_cleanup (xfree, local_addr);
964 /* Now either addrs or offsets is non-zero. */
968 /* We will modify the main symbol table, make sure that all its users
969 will be cleaned up if an error occurs during symbol reading. */
970 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
972 /* Since no error yet, throw away the old symbol table. */
974 if (symfile_objfile != NULL)
976 free_objfile (symfile_objfile);
977 gdb_assert (symfile_objfile == NULL);
980 /* Currently we keep symbols from the add-symbol-file command.
981 If the user wants to get rid of them, they should do "symbol-file"
982 without arguments first. Not sure this is the best behavior
985 (*objfile->sf->sym_new_init) (objfile);
988 /* Convert addr into an offset rather than an absolute address.
989 We find the lowest address of a loaded segment in the objfile,
990 and assume that <addr> is where that got loaded.
992 We no longer warn if the lowest section is not a text segment (as
993 happens for the PA64 port. */
994 if (addrs && addrs->other[0].name)
995 addr_info_make_relative (addrs, objfile->obfd);
997 /* Initialize symbol reading routines for this objfile, allow complaints to
998 appear for this new file, and record how verbose to be, then do the
999 initial symbol reading for this file. */
1001 (*objfile->sf->sym_init) (objfile);
1002 clear_complaints (&symfile_complaints, 1, add_flags & SYMFILE_VERBOSE);
1005 (*objfile->sf->sym_offsets) (objfile, addrs);
1008 size_t size = SIZEOF_N_SECTION_OFFSETS (num_offsets);
1010 /* Just copy in the offset table directly as given to us. */
1011 objfile->num_sections = num_offsets;
1012 objfile->section_offsets
1013 = ((struct section_offsets *)
1014 obstack_alloc (&objfile->objfile_obstack, size));
1015 memcpy (objfile->section_offsets, offsets, size);
1017 init_objfile_sect_indices (objfile);
1020 (*objfile->sf->sym_read) (objfile, add_flags);
1022 /* Discard cleanups as symbol reading was successful. */
1024 discard_cleanups (old_chain);
1028 /* Perform required actions after either reading in the initial
1029 symbols for a new objfile, or mapping in the symbols from a reusable
1030 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
1033 new_symfile_objfile (struct objfile *objfile, int add_flags)
1035 /* If this is the main symbol file we have to clean up all users of the
1036 old main symbol file. Otherwise it is sufficient to fixup all the
1037 breakpoints that may have been redefined by this symbol file. */
1038 if (add_flags & SYMFILE_MAINLINE)
1040 /* OK, make it the "real" symbol file. */
1041 symfile_objfile = objfile;
1043 clear_symtab_users (add_flags);
1045 else if ((add_flags & SYMFILE_DEFER_BP_RESET) == 0)
1047 breakpoint_re_set ();
1050 /* We're done reading the symbol file; finish off complaints. */
1051 clear_complaints (&symfile_complaints, 0, add_flags & SYMFILE_VERBOSE);
1054 /* Process a symbol file, as either the main file or as a dynamically
1057 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1058 This BFD will be closed on error, and is always consumed by this function.
1060 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1061 extra, such as dynamically loaded code, and what to do with breakpoins.
1063 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
1064 syms_from_objfile, above.
1065 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1067 Upon success, returns a pointer to the objfile that was added.
1068 Upon failure, jumps back to command level (never returns). */
1070 static struct objfile *
1071 symbol_file_add_with_addrs_or_offsets (bfd *abfd,
1073 struct section_addr_info *addrs,
1074 struct section_offsets *offsets,
1078 struct objfile *objfile;
1079 struct cleanup *my_cleanups;
1080 const char *name = bfd_get_filename (abfd);
1081 const int from_tty = add_flags & SYMFILE_VERBOSE;
1083 if (readnow_symbol_files)
1084 flags |= OBJF_READNOW;
1086 my_cleanups = make_cleanup_bfd_close (abfd);
1088 /* Give user a chance to burp if we'd be
1089 interactively wiping out any existing symbols. */
1091 if ((have_full_symbols () || have_partial_symbols ())
1092 && (add_flags & SYMFILE_MAINLINE)
1094 && !query (_("Load new symbol table from \"%s\"? "), name))
1095 error (_("Not confirmed."));
1097 objfile = allocate_objfile (abfd, flags);
1098 discard_cleanups (my_cleanups);
1100 /* We either created a new mapped symbol table, mapped an existing
1101 symbol table file which has not had initial symbol reading
1102 performed, or need to read an unmapped symbol table. */
1103 if (from_tty || info_verbose)
1105 if (deprecated_pre_add_symbol_hook)
1106 deprecated_pre_add_symbol_hook (name);
1109 printf_unfiltered (_("Reading symbols from %s..."), name);
1111 gdb_flush (gdb_stdout);
1114 syms_from_objfile (objfile, addrs, offsets, num_offsets,
1117 /* We now have at least a partial symbol table. Check to see if the
1118 user requested that all symbols be read on initial access via either
1119 the gdb startup command line or on a per symbol file basis. Expand
1120 all partial symbol tables for this objfile if so. */
1122 if ((flags & OBJF_READNOW))
1124 if (from_tty || info_verbose)
1126 printf_unfiltered (_("expanding to full symbols..."));
1128 gdb_flush (gdb_stdout);
1132 objfile->sf->qf->expand_all_symtabs (objfile);
1135 if ((from_tty || info_verbose)
1136 && !objfile_has_symbols (objfile))
1139 printf_unfiltered (_("(no debugging symbols found)..."));
1143 if (from_tty || info_verbose)
1145 if (deprecated_post_add_symbol_hook)
1146 deprecated_post_add_symbol_hook ();
1148 printf_unfiltered (_("done.\n"));
1151 /* We print some messages regardless of whether 'from_tty ||
1152 info_verbose' is true, so make sure they go out at the right
1154 gdb_flush (gdb_stdout);
1156 do_cleanups (my_cleanups);
1158 if (objfile->sf == NULL)
1160 observer_notify_new_objfile (objfile);
1161 return objfile; /* No symbols. */
1164 new_symfile_objfile (objfile, add_flags);
1166 observer_notify_new_objfile (objfile);
1168 bfd_cache_close_all ();
1172 /* Add BFD as a separate debug file for OBJFILE. */
1175 symbol_file_add_separate (bfd *bfd, int symfile_flags, struct objfile *objfile)
1177 struct objfile *new_objfile;
1178 struct section_addr_info *sap;
1179 struct cleanup *my_cleanup;
1181 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1182 because sections of BFD may not match sections of OBJFILE and because
1183 vma may have been modified by tools such as prelink. */
1184 sap = build_section_addr_info_from_objfile (objfile);
1185 my_cleanup = make_cleanup_free_section_addr_info (sap);
1187 new_objfile = symbol_file_add_with_addrs_or_offsets
1188 (bfd, symfile_flags,
1190 objfile->flags & (OBJF_REORDERED | OBJF_SHARED | OBJF_READNOW
1191 | OBJF_USERLOADED));
1193 do_cleanups (my_cleanup);
1195 add_separate_debug_objfile (new_objfile, objfile);
1198 /* Process the symbol file ABFD, as either the main file or as a
1199 dynamically loaded file.
1201 See symbol_file_add_with_addrs_or_offsets's comments for
1204 symbol_file_add_from_bfd (bfd *abfd, int add_flags,
1205 struct section_addr_info *addrs,
1208 return symbol_file_add_with_addrs_or_offsets (abfd, add_flags, addrs, 0, 0,
1213 /* Process a symbol file, as either the main file or as a dynamically
1214 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
1217 symbol_file_add (char *name, int add_flags, struct section_addr_info *addrs,
1220 return symbol_file_add_from_bfd (symfile_bfd_open (name), add_flags, addrs,
1225 /* Call symbol_file_add() with default values and update whatever is
1226 affected by the loading of a new main().
1227 Used when the file is supplied in the gdb command line
1228 and by some targets with special loading requirements.
1229 The auxiliary function, symbol_file_add_main_1(), has the flags
1230 argument for the switches that can only be specified in the symbol_file
1234 symbol_file_add_main (char *args, int from_tty)
1236 symbol_file_add_main_1 (args, from_tty, 0);
1240 symbol_file_add_main_1 (char *args, int from_tty, int flags)
1242 const int add_flags = SYMFILE_MAINLINE | (from_tty ? SYMFILE_VERBOSE : 0);
1243 symbol_file_add (args, add_flags, NULL, flags);
1245 /* Getting new symbols may change our opinion about
1246 what is frameless. */
1247 reinit_frame_cache ();
1249 set_initial_language ();
1253 symbol_file_clear (int from_tty)
1255 if ((have_full_symbols () || have_partial_symbols ())
1258 ? !query (_("Discard symbol table from `%s'? "),
1259 symfile_objfile->name)
1260 : !query (_("Discard symbol table? "))))
1261 error (_("Not confirmed."));
1263 /* solib descriptors may have handles to objfiles. Wipe them before their
1264 objfiles get stale by free_all_objfiles. */
1265 no_shared_libraries (NULL, from_tty);
1267 free_all_objfiles ();
1269 gdb_assert (symfile_objfile == NULL);
1271 printf_unfiltered (_("No symbol file now.\n"));
1275 get_debug_link_info (struct objfile *objfile, unsigned long *crc32_out)
1278 bfd_size_type debuglink_size;
1279 unsigned long crc32;
1283 sect = bfd_get_section_by_name (objfile->obfd, ".gnu_debuglink");
1288 debuglink_size = bfd_section_size (objfile->obfd, sect);
1290 contents = xmalloc (debuglink_size);
1291 bfd_get_section_contents (objfile->obfd, sect, contents,
1292 (file_ptr)0, (bfd_size_type)debuglink_size);
1294 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1295 crc_offset = strlen (contents) + 1;
1296 crc_offset = (crc_offset + 3) & ~3;
1298 crc32 = bfd_get_32 (objfile->obfd, (bfd_byte *) (contents + crc_offset));
1305 separate_debug_file_exists (const char *name, unsigned long crc,
1306 struct objfile *parent_objfile)
1308 unsigned long file_crc = 0;
1310 gdb_byte buffer[8*1024];
1312 struct stat parent_stat, abfd_stat;
1314 /* Find a separate debug info file as if symbols would be present in
1315 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1316 section can contain just the basename of PARENT_OBJFILE without any
1317 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1318 the separate debug infos with the same basename can exist. */
1320 if (strcmp (name, parent_objfile->name) == 0)
1323 abfd = bfd_open_maybe_remote (name);
1328 /* Verify symlinks were not the cause of strcmp name difference above.
1330 Some operating systems, e.g. Windows, do not provide a meaningful
1331 st_ino; they always set it to zero. (Windows does provide a
1332 meaningful st_dev.) Do not indicate a duplicate library in that
1333 case. While there is no guarantee that a system that provides
1334 meaningful inode numbers will never set st_ino to zero, this is
1335 merely an optimization, so we do not need to worry about false
1338 if (bfd_stat (abfd, &abfd_stat) == 0
1339 && bfd_stat (parent_objfile->obfd, &parent_stat) == 0
1340 && abfd_stat.st_dev == parent_stat.st_dev
1341 && abfd_stat.st_ino == parent_stat.st_ino
1342 && abfd_stat.st_ino != 0)
1348 while ((count = bfd_bread (buffer, sizeof (buffer), abfd)) > 0)
1349 file_crc = gnu_debuglink_crc32 (file_crc, buffer, count);
1353 if (crc != file_crc)
1355 warning (_("the debug information found in \"%s\""
1356 " does not match \"%s\" (CRC mismatch).\n"),
1357 name, parent_objfile->name);
1364 char *debug_file_directory = NULL;
1366 show_debug_file_directory (struct ui_file *file, int from_tty,
1367 struct cmd_list_element *c, const char *value)
1369 fprintf_filtered (file,
1370 _("The directory where separate debug "
1371 "symbols are searched for is \"%s\".\n"),
1375 #if ! defined (DEBUG_SUBDIRECTORY)
1376 #define DEBUG_SUBDIRECTORY ".debug"
1380 find_separate_debug_file_by_debuglink (struct objfile *objfile)
1382 char *basename, *debugdir;
1384 char *debugfile = NULL;
1385 char *canon_name = NULL;
1386 unsigned long crc32;
1389 basename = get_debug_link_info (objfile, &crc32);
1391 if (basename == NULL)
1392 /* There's no separate debug info, hence there's no way we could
1393 load it => no warning. */
1394 goto cleanup_return_debugfile;
1396 dir = xstrdup (objfile->name);
1398 /* Strip off the final filename part, leaving the directory name,
1399 followed by a slash. The directory can be relative or absolute. */
1400 for (i = strlen(dir) - 1; i >= 0; i--)
1402 if (IS_DIR_SEPARATOR (dir[i]))
1405 /* If I is -1 then no directory is present there and DIR will be "". */
1408 /* Set I to max (strlen (canon_name), strlen (dir)). */
1409 canon_name = lrealpath (dir);
1411 if (canon_name && strlen (canon_name) > i)
1412 i = strlen (canon_name);
1414 debugfile = xmalloc (strlen (debug_file_directory) + 1
1416 + strlen (DEBUG_SUBDIRECTORY)
1421 /* First try in the same directory as the original file. */
1422 strcpy (debugfile, dir);
1423 strcat (debugfile, basename);
1425 if (separate_debug_file_exists (debugfile, crc32, objfile))
1426 goto cleanup_return_debugfile;
1428 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1429 strcpy (debugfile, dir);
1430 strcat (debugfile, DEBUG_SUBDIRECTORY);
1431 strcat (debugfile, "/");
1432 strcat (debugfile, basename);
1434 if (separate_debug_file_exists (debugfile, crc32, objfile))
1435 goto cleanup_return_debugfile;
1437 /* Then try in the global debugfile directories.
1439 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1440 cause "/..." lookups. */
1442 debugdir = debug_file_directory;
1447 while (*debugdir == DIRNAME_SEPARATOR)
1450 debugdir_end = strchr (debugdir, DIRNAME_SEPARATOR);
1451 if (debugdir_end == NULL)
1452 debugdir_end = &debugdir[strlen (debugdir)];
1454 memcpy (debugfile, debugdir, debugdir_end - debugdir);
1455 debugfile[debugdir_end - debugdir] = 0;
1456 strcat (debugfile, "/");
1457 strcat (debugfile, dir);
1458 strcat (debugfile, basename);
1460 if (separate_debug_file_exists (debugfile, crc32, objfile))
1461 goto cleanup_return_debugfile;
1463 /* If the file is in the sysroot, try using its base path in the
1464 global debugfile directory. */
1466 && strncmp (canon_name, gdb_sysroot, strlen (gdb_sysroot)) == 0
1467 && IS_DIR_SEPARATOR (canon_name[strlen (gdb_sysroot)]))
1469 memcpy (debugfile, debugdir, debugdir_end - debugdir);
1470 debugfile[debugdir_end - debugdir] = 0;
1471 strcat (debugfile, canon_name + strlen (gdb_sysroot));
1472 strcat (debugfile, "/");
1473 strcat (debugfile, basename);
1475 if (separate_debug_file_exists (debugfile, crc32, objfile))
1476 goto cleanup_return_debugfile;
1479 debugdir = debugdir_end;
1481 while (*debugdir != 0);
1486 cleanup_return_debugfile:
1494 /* This is the symbol-file command. Read the file, analyze its
1495 symbols, and add a struct symtab to a symtab list. The syntax of
1496 the command is rather bizarre:
1498 1. The function buildargv implements various quoting conventions
1499 which are undocumented and have little or nothing in common with
1500 the way things are quoted (or not quoted) elsewhere in GDB.
1502 2. Options are used, which are not generally used in GDB (perhaps
1503 "set mapped on", "set readnow on" would be better)
1505 3. The order of options matters, which is contrary to GNU
1506 conventions (because it is confusing and inconvenient). */
1509 symbol_file_command (char *args, int from_tty)
1515 symbol_file_clear (from_tty);
1519 char **argv = gdb_buildargv (args);
1520 int flags = OBJF_USERLOADED;
1521 struct cleanup *cleanups;
1524 cleanups = make_cleanup_freeargv (argv);
1525 while (*argv != NULL)
1527 if (strcmp (*argv, "-readnow") == 0)
1528 flags |= OBJF_READNOW;
1529 else if (**argv == '-')
1530 error (_("unknown option `%s'"), *argv);
1533 symbol_file_add_main_1 (*argv, from_tty, flags);
1541 error (_("no symbol file name was specified"));
1543 do_cleanups (cleanups);
1547 /* Set the initial language.
1549 FIXME: A better solution would be to record the language in the
1550 psymtab when reading partial symbols, and then use it (if known) to
1551 set the language. This would be a win for formats that encode the
1552 language in an easily discoverable place, such as DWARF. For
1553 stabs, we can jump through hoops looking for specially named
1554 symbols or try to intuit the language from the specific type of
1555 stabs we find, but we can't do that until later when we read in
1559 set_initial_language (void)
1561 enum language lang = language_unknown;
1563 if (language_of_main != language_unknown)
1564 lang = language_of_main;
1567 const char *filename;
1569 filename = find_main_filename ();
1570 if (filename != NULL)
1571 lang = deduce_language_from_filename (filename);
1574 if (lang == language_unknown)
1576 /* Make C the default language */
1580 set_language (lang);
1581 expected_language = current_language; /* Don't warn the user. */
1584 /* If NAME is a remote name open the file using remote protocol, otherwise
1585 open it normally. */
1588 bfd_open_maybe_remote (const char *name)
1590 if (remote_filename_p (name))
1591 return remote_bfd_open (name, gnutarget);
1593 return bfd_openr (name, gnutarget);
1597 /* Open the file specified by NAME and hand it off to BFD for
1598 preliminary analysis. Return a newly initialized bfd *, which
1599 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1600 absolute). In case of trouble, error() is called. */
1603 symfile_bfd_open (char *name)
1607 char *absolute_name;
1609 if (remote_filename_p (name))
1611 name = xstrdup (name);
1612 sym_bfd = remote_bfd_open (name, gnutarget);
1615 make_cleanup (xfree, name);
1616 error (_("`%s': can't open to read symbols: %s."), name,
1617 bfd_errmsg (bfd_get_error ()));
1620 if (!bfd_check_format (sym_bfd, bfd_object))
1622 bfd_close (sym_bfd);
1623 make_cleanup (xfree, name);
1624 error (_("`%s': can't read symbols: %s."), name,
1625 bfd_errmsg (bfd_get_error ()));
1631 name = tilde_expand (name); /* Returns 1st new malloc'd copy. */
1633 /* Look down path for it, allocate 2nd new malloc'd copy. */
1634 desc = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, name,
1635 O_RDONLY | O_BINARY, &absolute_name);
1636 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1639 char *exename = alloca (strlen (name) + 5);
1641 strcat (strcpy (exename, name), ".exe");
1642 desc = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, exename,
1643 O_RDONLY | O_BINARY, &absolute_name);
1648 make_cleanup (xfree, name);
1649 perror_with_name (name);
1652 /* Free 1st new malloc'd copy, but keep the 2nd malloc'd copy in
1653 bfd. It'll be freed in free_objfile(). */
1655 name = absolute_name;
1657 sym_bfd = bfd_fopen (name, gnutarget, FOPEN_RB, desc);
1661 make_cleanup (xfree, name);
1662 error (_("`%s': can't open to read symbols: %s."), name,
1663 bfd_errmsg (bfd_get_error ()));
1665 bfd_set_cacheable (sym_bfd, 1);
1667 if (!bfd_check_format (sym_bfd, bfd_object))
1669 /* FIXME: should be checking for errors from bfd_close (for one
1670 thing, on error it does not free all the storage associated
1672 bfd_close (sym_bfd); /* This also closes desc. */
1673 make_cleanup (xfree, name);
1674 error (_("`%s': can't read symbols: %s."), name,
1675 bfd_errmsg (bfd_get_error ()));
1678 /* bfd_usrdata exists for applications and libbfd must not touch it. */
1679 gdb_assert (bfd_usrdata (sym_bfd) == NULL);
1684 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1685 the section was not found. */
1688 get_section_index (struct objfile *objfile, char *section_name)
1690 asection *sect = bfd_get_section_by_name (objfile->obfd, section_name);
1698 /* Link SF into the global symtab_fns list. Called on startup by the
1699 _initialize routine in each object file format reader, to register
1700 information about each format the reader is prepared to handle. */
1703 add_symtab_fns (const struct sym_fns *sf)
1705 VEC_safe_push (sym_fns_ptr, symtab_fns, sf);
1708 /* Initialize OBJFILE to read symbols from its associated BFD. It
1709 either returns or calls error(). The result is an initialized
1710 struct sym_fns in the objfile structure, that contains cached
1711 information about the symbol file. */
1713 static const struct sym_fns *
1714 find_sym_fns (bfd *abfd)
1716 const struct sym_fns *sf;
1717 enum bfd_flavour our_flavour = bfd_get_flavour (abfd);
1720 if (our_flavour == bfd_target_srec_flavour
1721 || our_flavour == bfd_target_ihex_flavour
1722 || our_flavour == bfd_target_tekhex_flavour)
1723 return NULL; /* No symbols. */
1725 for (i = 0; VEC_iterate (sym_fns_ptr, symtab_fns, i, sf); ++i)
1726 if (our_flavour == sf->sym_flavour)
1729 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1730 bfd_get_target (abfd));
1734 /* This function runs the load command of our current target. */
1737 load_command (char *arg, int from_tty)
1741 /* The user might be reloading because the binary has changed. Take
1742 this opportunity to check. */
1743 reopen_exec_file ();
1751 parg = arg = get_exec_file (1);
1753 /* Count how many \ " ' tab space there are in the name. */
1754 while ((parg = strpbrk (parg, "\\\"'\t ")))
1762 /* We need to quote this string so buildargv can pull it apart. */
1763 char *temp = xmalloc (strlen (arg) + count + 1 );
1767 make_cleanup (xfree, temp);
1770 while ((parg = strpbrk (parg, "\\\"'\t ")))
1772 strncpy (ptemp, prev, parg - prev);
1773 ptemp += parg - prev;
1777 strcpy (ptemp, prev);
1783 target_load (arg, from_tty);
1785 /* After re-loading the executable, we don't really know which
1786 overlays are mapped any more. */
1787 overlay_cache_invalid = 1;
1790 /* This version of "load" should be usable for any target. Currently
1791 it is just used for remote targets, not inftarg.c or core files,
1792 on the theory that only in that case is it useful.
1794 Avoiding xmodem and the like seems like a win (a) because we don't have
1795 to worry about finding it, and (b) On VMS, fork() is very slow and so
1796 we don't want to run a subprocess. On the other hand, I'm not sure how
1797 performance compares. */
1799 static int validate_download = 0;
1801 /* Callback service function for generic_load (bfd_map_over_sections). */
1804 add_section_size_callback (bfd *abfd, asection *asec, void *data)
1806 bfd_size_type *sum = data;
1808 *sum += bfd_get_section_size (asec);
1811 /* Opaque data for load_section_callback. */
1812 struct load_section_data {
1813 unsigned long load_offset;
1814 struct load_progress_data *progress_data;
1815 VEC(memory_write_request_s) *requests;
1818 /* Opaque data for load_progress. */
1819 struct load_progress_data {
1820 /* Cumulative data. */
1821 unsigned long write_count;
1822 unsigned long data_count;
1823 bfd_size_type total_size;
1826 /* Opaque data for load_progress for a single section. */
1827 struct load_progress_section_data {
1828 struct load_progress_data *cumulative;
1830 /* Per-section data. */
1831 const char *section_name;
1832 ULONGEST section_sent;
1833 ULONGEST section_size;
1838 /* Target write callback routine for progress reporting. */
1841 load_progress (ULONGEST bytes, void *untyped_arg)
1843 struct load_progress_section_data *args = untyped_arg;
1844 struct load_progress_data *totals;
1847 /* Writing padding data. No easy way to get at the cumulative
1848 stats, so just ignore this. */
1851 totals = args->cumulative;
1853 if (bytes == 0 && args->section_sent == 0)
1855 /* The write is just starting. Let the user know we've started
1857 ui_out_message (uiout, 0, "Loading section %s, size %s lma %s\n",
1858 args->section_name, hex_string (args->section_size),
1859 paddress (target_gdbarch, args->lma));
1863 if (validate_download)
1865 /* Broken memories and broken monitors manifest themselves here
1866 when bring new computers to life. This doubles already slow
1868 /* NOTE: cagney/1999-10-18: A more efficient implementation
1869 might add a verify_memory() method to the target vector and
1870 then use that. remote.c could implement that method using
1871 the ``qCRC'' packet. */
1872 gdb_byte *check = xmalloc (bytes);
1873 struct cleanup *verify_cleanups = make_cleanup (xfree, check);
1875 if (target_read_memory (args->lma, check, bytes) != 0)
1876 error (_("Download verify read failed at %s"),
1877 paddress (target_gdbarch, args->lma));
1878 if (memcmp (args->buffer, check, bytes) != 0)
1879 error (_("Download verify compare failed at %s"),
1880 paddress (target_gdbarch, args->lma));
1881 do_cleanups (verify_cleanups);
1883 totals->data_count += bytes;
1885 args->buffer += bytes;
1886 totals->write_count += 1;
1887 args->section_sent += bytes;
1889 || (deprecated_ui_load_progress_hook != NULL
1890 && deprecated_ui_load_progress_hook (args->section_name,
1891 args->section_sent)))
1892 error (_("Canceled the download"));
1894 if (deprecated_show_load_progress != NULL)
1895 deprecated_show_load_progress (args->section_name,
1899 totals->total_size);
1902 /* Callback service function for generic_load (bfd_map_over_sections). */
1905 load_section_callback (bfd *abfd, asection *asec, void *data)
1907 struct memory_write_request *new_request;
1908 struct load_section_data *args = data;
1909 struct load_progress_section_data *section_data;
1910 bfd_size_type size = bfd_get_section_size (asec);
1912 const char *sect_name = bfd_get_section_name (abfd, asec);
1914 if ((bfd_get_section_flags (abfd, asec) & SEC_LOAD) == 0)
1920 new_request = VEC_safe_push (memory_write_request_s,
1921 args->requests, NULL);
1922 memset (new_request, 0, sizeof (struct memory_write_request));
1923 section_data = xcalloc (1, sizeof (struct load_progress_section_data));
1924 new_request->begin = bfd_section_lma (abfd, asec) + args->load_offset;
1925 new_request->end = new_request->begin + size; /* FIXME Should size
1927 new_request->data = xmalloc (size);
1928 new_request->baton = section_data;
1930 buffer = new_request->data;
1932 section_data->cumulative = args->progress_data;
1933 section_data->section_name = sect_name;
1934 section_data->section_size = size;
1935 section_data->lma = new_request->begin;
1936 section_data->buffer = buffer;
1938 bfd_get_section_contents (abfd, asec, buffer, 0, size);
1941 /* Clean up an entire memory request vector, including load
1942 data and progress records. */
1945 clear_memory_write_data (void *arg)
1947 VEC(memory_write_request_s) **vec_p = arg;
1948 VEC(memory_write_request_s) *vec = *vec_p;
1950 struct memory_write_request *mr;
1952 for (i = 0; VEC_iterate (memory_write_request_s, vec, i, mr); ++i)
1957 VEC_free (memory_write_request_s, vec);
1961 generic_load (char *args, int from_tty)
1964 struct timeval start_time, end_time;
1966 struct cleanup *old_cleanups = make_cleanup (null_cleanup, 0);
1967 struct load_section_data cbdata;
1968 struct load_progress_data total_progress;
1973 memset (&cbdata, 0, sizeof (cbdata));
1974 memset (&total_progress, 0, sizeof (total_progress));
1975 cbdata.progress_data = &total_progress;
1977 make_cleanup (clear_memory_write_data, &cbdata.requests);
1980 error_no_arg (_("file to load"));
1982 argv = gdb_buildargv (args);
1983 make_cleanup_freeargv (argv);
1985 filename = tilde_expand (argv[0]);
1986 make_cleanup (xfree, filename);
1988 if (argv[1] != NULL)
1992 cbdata.load_offset = strtoul (argv[1], &endptr, 0);
1994 /* If the last word was not a valid number then
1995 treat it as a file name with spaces in. */
1996 if (argv[1] == endptr)
1997 error (_("Invalid download offset:%s."), argv[1]);
1999 if (argv[2] != NULL)
2000 error (_("Too many parameters."));
2003 /* Open the file for loading. */
2004 loadfile_bfd = bfd_openr (filename, gnutarget);
2005 if (loadfile_bfd == NULL)
2007 perror_with_name (filename);
2011 /* FIXME: should be checking for errors from bfd_close (for one thing,
2012 on error it does not free all the storage associated with the
2014 make_cleanup_bfd_close (loadfile_bfd);
2016 if (!bfd_check_format (loadfile_bfd, bfd_object))
2018 error (_("\"%s\" is not an object file: %s"), filename,
2019 bfd_errmsg (bfd_get_error ()));
2022 bfd_map_over_sections (loadfile_bfd, add_section_size_callback,
2023 (void *) &total_progress.total_size);
2025 bfd_map_over_sections (loadfile_bfd, load_section_callback, &cbdata);
2027 gettimeofday (&start_time, NULL);
2029 if (target_write_memory_blocks (cbdata.requests, flash_discard,
2030 load_progress) != 0)
2031 error (_("Load failed"));
2033 gettimeofday (&end_time, NULL);
2035 entry = bfd_get_start_address (loadfile_bfd);
2036 ui_out_text (uiout, "Start address ");
2037 ui_out_field_fmt (uiout, "address", "%s", paddress (target_gdbarch, entry));
2038 ui_out_text (uiout, ", load size ");
2039 ui_out_field_fmt (uiout, "load-size", "%lu", total_progress.data_count);
2040 ui_out_text (uiout, "\n");
2041 /* We were doing this in remote-mips.c, I suspect it is right
2042 for other targets too. */
2043 regcache_write_pc (get_current_regcache (), entry);
2045 /* Reset breakpoints, now that we have changed the load image. For
2046 instance, breakpoints may have been set (or reset, by
2047 post_create_inferior) while connected to the target but before we
2048 loaded the program. In that case, the prologue analyzer could
2049 have read instructions from the target to find the right
2050 breakpoint locations. Loading has changed the contents of that
2053 breakpoint_re_set ();
2055 /* FIXME: are we supposed to call symbol_file_add or not? According
2056 to a comment from remote-mips.c (where a call to symbol_file_add
2057 was commented out), making the call confuses GDB if more than one
2058 file is loaded in. Some targets do (e.g., remote-vx.c) but
2059 others don't (or didn't - perhaps they have all been deleted). */
2061 print_transfer_performance (gdb_stdout, total_progress.data_count,
2062 total_progress.write_count,
2063 &start_time, &end_time);
2065 do_cleanups (old_cleanups);
2068 /* Report how fast the transfer went. */
2070 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
2071 replaced by print_transfer_performance (with a very different
2072 function signature). */
2075 report_transfer_performance (unsigned long data_count, time_t start_time,
2078 struct timeval start, end;
2080 start.tv_sec = start_time;
2082 end.tv_sec = end_time;
2085 print_transfer_performance (gdb_stdout, data_count, 0, &start, &end);
2089 print_transfer_performance (struct ui_file *stream,
2090 unsigned long data_count,
2091 unsigned long write_count,
2092 const struct timeval *start_time,
2093 const struct timeval *end_time)
2095 ULONGEST time_count;
2097 /* Compute the elapsed time in milliseconds, as a tradeoff between
2098 accuracy and overflow. */
2099 time_count = (end_time->tv_sec - start_time->tv_sec) * 1000;
2100 time_count += (end_time->tv_usec - start_time->tv_usec) / 1000;
2102 ui_out_text (uiout, "Transfer rate: ");
2105 unsigned long rate = ((ULONGEST) data_count * 1000) / time_count;
2107 if (ui_out_is_mi_like_p (uiout))
2109 ui_out_field_fmt (uiout, "transfer-rate", "%lu", rate * 8);
2110 ui_out_text (uiout, " bits/sec");
2112 else if (rate < 1024)
2114 ui_out_field_fmt (uiout, "transfer-rate", "%lu", rate);
2115 ui_out_text (uiout, " bytes/sec");
2119 ui_out_field_fmt (uiout, "transfer-rate", "%lu", rate / 1024);
2120 ui_out_text (uiout, " KB/sec");
2125 ui_out_field_fmt (uiout, "transferred-bits", "%lu", (data_count * 8));
2126 ui_out_text (uiout, " bits in <1 sec");
2128 if (write_count > 0)
2130 ui_out_text (uiout, ", ");
2131 ui_out_field_fmt (uiout, "write-rate", "%lu", data_count / write_count);
2132 ui_out_text (uiout, " bytes/write");
2134 ui_out_text (uiout, ".\n");
2137 /* This function allows the addition of incrementally linked object files.
2138 It does not modify any state in the target, only in the debugger. */
2139 /* Note: ezannoni 2000-04-13 This function/command used to have a
2140 special case syntax for the rombug target (Rombug is the boot
2141 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2142 rombug case, the user doesn't need to supply a text address,
2143 instead a call to target_link() (in target.c) would supply the
2144 value to use. We are now discontinuing this type of ad hoc syntax. */
2147 add_symbol_file_command (char *args, int from_tty)
2149 struct gdbarch *gdbarch = get_current_arch ();
2150 char *filename = NULL;
2151 int flags = OBJF_USERLOADED;
2153 int section_index = 0;
2157 int expecting_sec_name = 0;
2158 int expecting_sec_addr = 0;
2167 struct section_addr_info *section_addrs;
2168 struct sect_opt *sect_opts = NULL;
2169 size_t num_sect_opts = 0;
2170 struct cleanup *my_cleanups = make_cleanup (null_cleanup, NULL);
2173 sect_opts = (struct sect_opt *) xmalloc (num_sect_opts
2174 * sizeof (struct sect_opt));
2179 error (_("add-symbol-file takes a file name and an address"));
2181 argv = gdb_buildargv (args);
2182 make_cleanup_freeargv (argv);
2184 for (arg = argv[0], argcnt = 0; arg != NULL; arg = argv[++argcnt])
2186 /* Process the argument. */
2189 /* The first argument is the file name. */
2190 filename = tilde_expand (arg);
2191 make_cleanup (xfree, filename);
2196 /* The second argument is always the text address at which
2197 to load the program. */
2198 sect_opts[section_index].name = ".text";
2199 sect_opts[section_index].value = arg;
2200 if (++section_index >= num_sect_opts)
2203 sect_opts = ((struct sect_opt *)
2204 xrealloc (sect_opts,
2206 * sizeof (struct sect_opt)));
2211 /* It's an option (starting with '-') or it's an argument
2216 if (strcmp (arg, "-readnow") == 0)
2217 flags |= OBJF_READNOW;
2218 else if (strcmp (arg, "-s") == 0)
2220 expecting_sec_name = 1;
2221 expecting_sec_addr = 1;
2226 if (expecting_sec_name)
2228 sect_opts[section_index].name = arg;
2229 expecting_sec_name = 0;
2232 if (expecting_sec_addr)
2234 sect_opts[section_index].value = arg;
2235 expecting_sec_addr = 0;
2236 if (++section_index >= num_sect_opts)
2239 sect_opts = ((struct sect_opt *)
2240 xrealloc (sect_opts,
2242 * sizeof (struct sect_opt)));
2246 error (_("USAGE: add-symbol-file <filename> <textaddress>"
2247 " [-mapped] [-readnow] [-s <secname> <addr>]*"));
2252 /* This command takes at least two arguments. The first one is a
2253 filename, and the second is the address where this file has been
2254 loaded. Abort now if this address hasn't been provided by the
2256 if (section_index < 1)
2257 error (_("The address where %s has been loaded is missing"), filename);
2259 /* Print the prompt for the query below. And save the arguments into
2260 a sect_addr_info structure to be passed around to other
2261 functions. We have to split this up into separate print
2262 statements because hex_string returns a local static
2265 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename);
2266 section_addrs = alloc_section_addr_info (section_index);
2267 make_cleanup (xfree, section_addrs);
2268 for (i = 0; i < section_index; i++)
2271 char *val = sect_opts[i].value;
2272 char *sec = sect_opts[i].name;
2274 addr = parse_and_eval_address (val);
2276 /* Here we store the section offsets in the order they were
2277 entered on the command line. */
2278 section_addrs->other[sec_num].name = sec;
2279 section_addrs->other[sec_num].addr = addr;
2280 printf_unfiltered ("\t%s_addr = %s\n", sec,
2281 paddress (gdbarch, addr));
2284 /* The object's sections are initialized when a
2285 call is made to build_objfile_section_table (objfile).
2286 This happens in reread_symbols.
2287 At this point, we don't know what file type this is,
2288 so we can't determine what section names are valid. */
2291 if (from_tty && (!query ("%s", "")))
2292 error (_("Not confirmed."));
2294 symbol_file_add (filename, from_tty ? SYMFILE_VERBOSE : 0,
2295 section_addrs, flags);
2297 /* Getting new symbols may change our opinion about what is
2299 reinit_frame_cache ();
2300 do_cleanups (my_cleanups);
2304 /* Re-read symbols if a symbol-file has changed. */
2306 reread_symbols (void)
2308 struct objfile *objfile;
2311 struct stat new_statbuf;
2314 /* With the addition of shared libraries, this should be modified,
2315 the load time should be saved in the partial symbol tables, since
2316 different tables may come from different source files. FIXME.
2317 This routine should then walk down each partial symbol table
2318 and see if the symbol table that it originates from has been changed. */
2320 for (objfile = object_files; objfile; objfile = objfile->next)
2322 /* solib-sunos.c creates one objfile with obfd. */
2323 if (objfile->obfd == NULL)
2326 /* Separate debug objfiles are handled in the main objfile. */
2327 if (objfile->separate_debug_objfile_backlink)
2330 /* If this object is from an archive (what you usually create with
2331 `ar', often called a `static library' on most systems, though
2332 a `shared library' on AIX is also an archive), then you should
2333 stat on the archive name, not member name. */
2334 if (objfile->obfd->my_archive)
2335 res = stat (objfile->obfd->my_archive->filename, &new_statbuf);
2337 res = stat (objfile->name, &new_statbuf);
2340 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2341 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2345 new_modtime = new_statbuf.st_mtime;
2346 if (new_modtime != objfile->mtime)
2348 struct cleanup *old_cleanups;
2349 struct section_offsets *offsets;
2351 char *obfd_filename;
2353 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2356 /* There are various functions like symbol_file_add,
2357 symfile_bfd_open, syms_from_objfile, etc., which might
2358 appear to do what we want. But they have various other
2359 effects which we *don't* want. So we just do stuff
2360 ourselves. We don't worry about mapped files (for one thing,
2361 any mapped file will be out of date). */
2363 /* If we get an error, blow away this objfile (not sure if
2364 that is the correct response for things like shared
2366 old_cleanups = make_cleanup_free_objfile (objfile);
2367 /* We need to do this whenever any symbols go away. */
2368 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
2370 if (exec_bfd != NULL && strcmp (bfd_get_filename (objfile->obfd),
2371 bfd_get_filename (exec_bfd)) == 0)
2373 /* Reload EXEC_BFD without asking anything. */
2375 exec_file_attach (bfd_get_filename (objfile->obfd), 0);
2378 /* Clean up any state BFD has sitting around. We don't need
2379 to close the descriptor but BFD lacks a way of closing the
2380 BFD without closing the descriptor. */
2381 obfd_filename = bfd_get_filename (objfile->obfd);
2382 if (!bfd_close (objfile->obfd))
2383 error (_("Can't close BFD for %s: %s"), objfile->name,
2384 bfd_errmsg (bfd_get_error ()));
2385 objfile->obfd = bfd_open_maybe_remote (obfd_filename);
2386 if (objfile->obfd == NULL)
2387 error (_("Can't open %s to read symbols."), objfile->name);
2389 objfile->obfd = gdb_bfd_ref (objfile->obfd);
2390 /* bfd_openr sets cacheable to true, which is what we want. */
2391 if (!bfd_check_format (objfile->obfd, bfd_object))
2392 error (_("Can't read symbols from %s: %s."), objfile->name,
2393 bfd_errmsg (bfd_get_error ()));
2395 /* Save the offsets, we will nuke them with the rest of the
2397 num_offsets = objfile->num_sections;
2398 offsets = ((struct section_offsets *)
2399 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets)));
2400 memcpy (offsets, objfile->section_offsets,
2401 SIZEOF_N_SECTION_OFFSETS (num_offsets));
2403 /* Remove any references to this objfile in the global
2405 preserve_values (objfile);
2407 /* Nuke all the state that we will re-read. Much of the following
2408 code which sets things to NULL really is necessary to tell
2409 other parts of GDB that there is nothing currently there.
2411 Try to keep the freeing order compatible with free_objfile. */
2413 if (objfile->sf != NULL)
2415 (*objfile->sf->sym_finish) (objfile);
2418 clear_objfile_data (objfile);
2420 /* Free the separate debug objfiles. It will be
2421 automatically recreated by sym_read. */
2422 free_objfile_separate_debug (objfile);
2424 /* FIXME: Do we have to free a whole linked list, or is this
2426 if (objfile->global_psymbols.list)
2427 xfree (objfile->global_psymbols.list);
2428 memset (&objfile->global_psymbols, 0,
2429 sizeof (objfile->global_psymbols));
2430 if (objfile->static_psymbols.list)
2431 xfree (objfile->static_psymbols.list);
2432 memset (&objfile->static_psymbols, 0,
2433 sizeof (objfile->static_psymbols));
2435 /* Free the obstacks for non-reusable objfiles. */
2436 psymbol_bcache_free (objfile->psymbol_cache);
2437 objfile->psymbol_cache = psymbol_bcache_init ();
2438 bcache_xfree (objfile->macro_cache);
2439 objfile->macro_cache = bcache_xmalloc (NULL, NULL);
2440 bcache_xfree (objfile->filename_cache);
2441 objfile->filename_cache = bcache_xmalloc (NULL,NULL);
2442 if (objfile->demangled_names_hash != NULL)
2444 htab_delete (objfile->demangled_names_hash);
2445 objfile->demangled_names_hash = NULL;
2447 obstack_free (&objfile->objfile_obstack, 0);
2448 objfile->sections = NULL;
2449 objfile->symtabs = NULL;
2450 objfile->psymtabs = NULL;
2451 objfile->psymtabs_addrmap = NULL;
2452 objfile->free_psymtabs = NULL;
2453 objfile->cp_namespace_symtab = NULL;
2454 objfile->template_symbols = NULL;
2455 objfile->msymbols = NULL;
2456 objfile->deprecated_sym_private = NULL;
2457 objfile->minimal_symbol_count = 0;
2458 memset (&objfile->msymbol_hash, 0,
2459 sizeof (objfile->msymbol_hash));
2460 memset (&objfile->msymbol_demangled_hash, 0,
2461 sizeof (objfile->msymbol_demangled_hash));
2463 objfile->psymbol_cache = psymbol_bcache_init ();
2464 objfile->macro_cache = bcache_xmalloc (NULL, NULL);
2465 objfile->filename_cache = bcache_xmalloc (NULL, NULL);
2466 /* obstack_init also initializes the obstack so it is
2467 empty. We could use obstack_specify_allocation but
2468 gdb_obstack.h specifies the alloc/dealloc
2470 obstack_init (&objfile->objfile_obstack);
2471 if (build_objfile_section_table (objfile))
2473 error (_("Can't find the file sections in `%s': %s"),
2474 objfile->name, bfd_errmsg (bfd_get_error ()));
2476 terminate_minimal_symbol_table (objfile);
2478 /* We use the same section offsets as from last time. I'm not
2479 sure whether that is always correct for shared libraries. */
2480 objfile->section_offsets = (struct section_offsets *)
2481 obstack_alloc (&objfile->objfile_obstack,
2482 SIZEOF_N_SECTION_OFFSETS (num_offsets));
2483 memcpy (objfile->section_offsets, offsets,
2484 SIZEOF_N_SECTION_OFFSETS (num_offsets));
2485 objfile->num_sections = num_offsets;
2487 /* What the hell is sym_new_init for, anyway? The concept of
2488 distinguishing between the main file and additional files
2489 in this way seems rather dubious. */
2490 if (objfile == symfile_objfile)
2492 (*objfile->sf->sym_new_init) (objfile);
2495 (*objfile->sf->sym_init) (objfile);
2496 clear_complaints (&symfile_complaints, 1, 1);
2497 /* Do not set flags as this is safe and we don't want to be
2499 (*objfile->sf->sym_read) (objfile, 0);
2500 if (!objfile_has_symbols (objfile))
2503 printf_unfiltered (_("(no debugging symbols found)\n"));
2507 /* We're done reading the symbol file; finish off complaints. */
2508 clear_complaints (&symfile_complaints, 0, 1);
2510 /* Getting new symbols may change our opinion about what is
2513 reinit_frame_cache ();
2515 /* Discard cleanups as symbol reading was successful. */
2516 discard_cleanups (old_cleanups);
2518 /* If the mtime has changed between the time we set new_modtime
2519 and now, we *want* this to be out of date, so don't call stat
2521 objfile->mtime = new_modtime;
2523 init_entry_point_info (objfile);
2529 /* Notify objfiles that we've modified objfile sections. */
2530 objfiles_changed ();
2532 clear_symtab_users (0);
2533 /* At least one objfile has changed, so we can consider that
2534 the executable we're debugging has changed too. */
2535 observer_notify_executable_changed ();
2548 static filename_language *filename_language_table;
2549 static int fl_table_size, fl_table_next;
2552 add_filename_language (char *ext, enum language lang)
2554 if (fl_table_next >= fl_table_size)
2556 fl_table_size += 10;
2557 filename_language_table =
2558 xrealloc (filename_language_table,
2559 fl_table_size * sizeof (*filename_language_table));
2562 filename_language_table[fl_table_next].ext = xstrdup (ext);
2563 filename_language_table[fl_table_next].lang = lang;
2567 static char *ext_args;
2569 show_ext_args (struct ui_file *file, int from_tty,
2570 struct cmd_list_element *c, const char *value)
2572 fprintf_filtered (file,
2573 _("Mapping between filename extension "
2574 "and source language is \"%s\".\n"),
2579 set_ext_lang_command (char *args, int from_tty, struct cmd_list_element *e)
2582 char *cp = ext_args;
2585 /* First arg is filename extension, starting with '.' */
2587 error (_("'%s': Filename extension must begin with '.'"), ext_args);
2589 /* Find end of first arg. */
2590 while (*cp && !isspace (*cp))
2594 error (_("'%s': two arguments required -- "
2595 "filename extension and language"),
2598 /* Null-terminate first arg. */
2601 /* Find beginning of second arg, which should be a source language. */
2602 while (*cp && isspace (*cp))
2606 error (_("'%s': two arguments required -- "
2607 "filename extension and language"),
2610 /* Lookup the language from among those we know. */
2611 lang = language_enum (cp);
2613 /* Now lookup the filename extension: do we already know it? */
2614 for (i = 0; i < fl_table_next; i++)
2615 if (0 == strcmp (ext_args, filename_language_table[i].ext))
2618 if (i >= fl_table_next)
2620 /* New file extension. */
2621 add_filename_language (ext_args, lang);
2625 /* Redefining a previously known filename extension. */
2628 /* query ("Really make files of type %s '%s'?", */
2629 /* ext_args, language_str (lang)); */
2631 xfree (filename_language_table[i].ext);
2632 filename_language_table[i].ext = xstrdup (ext_args);
2633 filename_language_table[i].lang = lang;
2638 info_ext_lang_command (char *args, int from_tty)
2642 printf_filtered (_("Filename extensions and the languages they represent:"));
2643 printf_filtered ("\n\n");
2644 for (i = 0; i < fl_table_next; i++)
2645 printf_filtered ("\t%s\t- %s\n",
2646 filename_language_table[i].ext,
2647 language_str (filename_language_table[i].lang));
2651 init_filename_language_table (void)
2653 if (fl_table_size == 0) /* Protect against repetition. */
2657 filename_language_table =
2658 xmalloc (fl_table_size * sizeof (*filename_language_table));
2659 add_filename_language (".c", language_c);
2660 add_filename_language (".d", language_d);
2661 add_filename_language (".C", language_cplus);
2662 add_filename_language (".cc", language_cplus);
2663 add_filename_language (".cp", language_cplus);
2664 add_filename_language (".cpp", language_cplus);
2665 add_filename_language (".cxx", language_cplus);
2666 add_filename_language (".c++", language_cplus);
2667 add_filename_language (".java", language_java);
2668 add_filename_language (".class", language_java);
2669 add_filename_language (".m", language_objc);
2670 add_filename_language (".f", language_fortran);
2671 add_filename_language (".F", language_fortran);
2672 add_filename_language (".for", language_fortran);
2673 add_filename_language (".FOR", language_fortran);
2674 add_filename_language (".ftn", language_fortran);
2675 add_filename_language (".FTN", language_fortran);
2676 add_filename_language (".fpp", language_fortran);
2677 add_filename_language (".FPP", language_fortran);
2678 add_filename_language (".f90", language_fortran);
2679 add_filename_language (".F90", language_fortran);
2680 add_filename_language (".f95", language_fortran);
2681 add_filename_language (".F95", language_fortran);
2682 add_filename_language (".f03", language_fortran);
2683 add_filename_language (".F03", language_fortran);
2684 add_filename_language (".f08", language_fortran);
2685 add_filename_language (".F08", language_fortran);
2686 add_filename_language (".s", language_asm);
2687 add_filename_language (".sx", language_asm);
2688 add_filename_language (".S", language_asm);
2689 add_filename_language (".pas", language_pascal);
2690 add_filename_language (".p", language_pascal);
2691 add_filename_language (".pp", language_pascal);
2692 add_filename_language (".adb", language_ada);
2693 add_filename_language (".ads", language_ada);
2694 add_filename_language (".a", language_ada);
2695 add_filename_language (".ada", language_ada);
2696 add_filename_language (".dg", language_ada);
2701 deduce_language_from_filename (const char *filename)
2706 if (filename != NULL)
2707 if ((cp = strrchr (filename, '.')) != NULL)
2708 for (i = 0; i < fl_table_next; i++)
2709 if (strcmp (cp, filename_language_table[i].ext) == 0)
2710 return filename_language_table[i].lang;
2712 return language_unknown;
2717 Allocate and partly initialize a new symbol table. Return a pointer
2718 to it. error() if no space.
2720 Caller must set these fields:
2729 allocate_symtab (const char *filename, struct objfile *objfile)
2731 struct symtab *symtab;
2733 symtab = (struct symtab *)
2734 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symtab));
2735 memset (symtab, 0, sizeof (*symtab));
2736 symtab->filename = (char *) bcache (filename, strlen (filename) + 1,
2737 objfile->filename_cache);
2738 symtab->fullname = NULL;
2739 symtab->language = deduce_language_from_filename (filename);
2740 symtab->debugformat = "unknown";
2742 /* Hook it to the objfile it comes from. */
2744 symtab->objfile = objfile;
2745 symtab->next = objfile->symtabs;
2746 objfile->symtabs = symtab;
2752 /* Reset all data structures in gdb which may contain references to symbol
2753 table data. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
2756 clear_symtab_users (int add_flags)
2758 /* Someday, we should do better than this, by only blowing away
2759 the things that really need to be blown. */
2761 /* Clear the "current" symtab first, because it is no longer valid.
2762 breakpoint_re_set may try to access the current symtab. */
2763 clear_current_source_symtab_and_line ();
2766 if ((add_flags & SYMFILE_DEFER_BP_RESET) == 0)
2767 breakpoint_re_set ();
2768 set_default_breakpoint (0, NULL, 0, 0, 0);
2769 clear_pc_function_cache ();
2770 observer_notify_new_objfile (NULL);
2772 /* Clear globals which might have pointed into a removed objfile.
2773 FIXME: It's not clear which of these are supposed to persist
2774 between expressions and which ought to be reset each time. */
2775 expression_context_block = NULL;
2776 innermost_block = NULL;
2778 /* Varobj may refer to old symbols, perform a cleanup. */
2779 varobj_invalidate ();
2784 clear_symtab_users_cleanup (void *ignore)
2786 clear_symtab_users (0);
2790 The following code implements an abstraction for debugging overlay sections.
2792 The target model is as follows:
2793 1) The gnu linker will permit multiple sections to be mapped into the
2794 same VMA, each with its own unique LMA (or load address).
2795 2) It is assumed that some runtime mechanism exists for mapping the
2796 sections, one by one, from the load address into the VMA address.
2797 3) This code provides a mechanism for gdb to keep track of which
2798 sections should be considered to be mapped from the VMA to the LMA.
2799 This information is used for symbol lookup, and memory read/write.
2800 For instance, if a section has been mapped then its contents
2801 should be read from the VMA, otherwise from the LMA.
2803 Two levels of debugger support for overlays are available. One is
2804 "manual", in which the debugger relies on the user to tell it which
2805 overlays are currently mapped. This level of support is
2806 implemented entirely in the core debugger, and the information about
2807 whether a section is mapped is kept in the objfile->obj_section table.
2809 The second level of support is "automatic", and is only available if
2810 the target-specific code provides functionality to read the target's
2811 overlay mapping table, and translate its contents for the debugger
2812 (by updating the mapped state information in the obj_section tables).
2814 The interface is as follows:
2816 overlay map <name> -- tell gdb to consider this section mapped
2817 overlay unmap <name> -- tell gdb to consider this section unmapped
2818 overlay list -- list the sections that GDB thinks are mapped
2819 overlay read-target -- get the target's state of what's mapped
2820 overlay off/manual/auto -- set overlay debugging state
2821 Functional interface:
2822 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2823 section, return that section.
2824 find_pc_overlay(pc): find any overlay section that contains
2825 the pc, either in its VMA or its LMA
2826 section_is_mapped(sect): true if overlay is marked as mapped
2827 section_is_overlay(sect): true if section's VMA != LMA
2828 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2829 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2830 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2831 overlay_mapped_address(...): map an address from section's LMA to VMA
2832 overlay_unmapped_address(...): map an address from section's VMA to LMA
2833 symbol_overlayed_address(...): Return a "current" address for symbol:
2834 either in VMA or LMA depending on whether
2835 the symbol's section is currently mapped. */
2837 /* Overlay debugging state: */
2839 enum overlay_debugging_state overlay_debugging = ovly_off;
2840 int overlay_cache_invalid = 0; /* True if need to refresh mapped state. */
2842 /* Function: section_is_overlay (SECTION)
2843 Returns true if SECTION has VMA not equal to LMA, ie.
2844 SECTION is loaded at an address different from where it will "run". */
2847 section_is_overlay (struct obj_section *section)
2849 if (overlay_debugging && section)
2851 bfd *abfd = section->objfile->obfd;
2852 asection *bfd_section = section->the_bfd_section;
2854 if (bfd_section_lma (abfd, bfd_section) != 0
2855 && bfd_section_lma (abfd, bfd_section)
2856 != bfd_section_vma (abfd, bfd_section))
2863 /* Function: overlay_invalidate_all (void)
2864 Invalidate the mapped state of all overlay sections (mark it as stale). */
2867 overlay_invalidate_all (void)
2869 struct objfile *objfile;
2870 struct obj_section *sect;
2872 ALL_OBJSECTIONS (objfile, sect)
2873 if (section_is_overlay (sect))
2874 sect->ovly_mapped = -1;
2877 /* Function: section_is_mapped (SECTION)
2878 Returns true if section is an overlay, and is currently mapped.
2880 Access to the ovly_mapped flag is restricted to this function, so
2881 that we can do automatic update. If the global flag
2882 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2883 overlay_invalidate_all. If the mapped state of the particular
2884 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2887 section_is_mapped (struct obj_section *osect)
2889 struct gdbarch *gdbarch;
2891 if (osect == 0 || !section_is_overlay (osect))
2894 switch (overlay_debugging)
2898 return 0; /* overlay debugging off */
2899 case ovly_auto: /* overlay debugging automatic */
2900 /* Unles there is a gdbarch_overlay_update function,
2901 there's really nothing useful to do here (can't really go auto). */
2902 gdbarch = get_objfile_arch (osect->objfile);
2903 if (gdbarch_overlay_update_p (gdbarch))
2905 if (overlay_cache_invalid)
2907 overlay_invalidate_all ();
2908 overlay_cache_invalid = 0;
2910 if (osect->ovly_mapped == -1)
2911 gdbarch_overlay_update (gdbarch, osect);
2913 /* fall thru to manual case */
2914 case ovly_on: /* overlay debugging manual */
2915 return osect->ovly_mapped == 1;
2919 /* Function: pc_in_unmapped_range
2920 If PC falls into the lma range of SECTION, return true, else false. */
2923 pc_in_unmapped_range (CORE_ADDR pc, struct obj_section *section)
2925 if (section_is_overlay (section))
2927 bfd *abfd = section->objfile->obfd;
2928 asection *bfd_section = section->the_bfd_section;
2930 /* We assume the LMA is relocated by the same offset as the VMA. */
2931 bfd_vma size = bfd_get_section_size (bfd_section);
2932 CORE_ADDR offset = obj_section_offset (section);
2934 if (bfd_get_section_lma (abfd, bfd_section) + offset <= pc
2935 && pc < bfd_get_section_lma (abfd, bfd_section) + offset + size)
2942 /* Function: pc_in_mapped_range
2943 If PC falls into the vma range of SECTION, return true, else false. */
2946 pc_in_mapped_range (CORE_ADDR pc, struct obj_section *section)
2948 if (section_is_overlay (section))
2950 if (obj_section_addr (section) <= pc
2951 && pc < obj_section_endaddr (section))
2959 /* Return true if the mapped ranges of sections A and B overlap, false
2962 sections_overlap (struct obj_section *a, struct obj_section *b)
2964 CORE_ADDR a_start = obj_section_addr (a);
2965 CORE_ADDR a_end = obj_section_endaddr (a);
2966 CORE_ADDR b_start = obj_section_addr (b);
2967 CORE_ADDR b_end = obj_section_endaddr (b);
2969 return (a_start < b_end && b_start < a_end);
2972 /* Function: overlay_unmapped_address (PC, SECTION)
2973 Returns the address corresponding to PC in the unmapped (load) range.
2974 May be the same as PC. */
2977 overlay_unmapped_address (CORE_ADDR pc, struct obj_section *section)
2979 if (section_is_overlay (section) && pc_in_mapped_range (pc, section))
2981 bfd *abfd = section->objfile->obfd;
2982 asection *bfd_section = section->the_bfd_section;
2984 return pc + bfd_section_lma (abfd, bfd_section)
2985 - bfd_section_vma (abfd, bfd_section);
2991 /* Function: overlay_mapped_address (PC, SECTION)
2992 Returns the address corresponding to PC in the mapped (runtime) range.
2993 May be the same as PC. */
2996 overlay_mapped_address (CORE_ADDR pc, struct obj_section *section)
2998 if (section_is_overlay (section) && pc_in_unmapped_range (pc, section))
3000 bfd *abfd = section->objfile->obfd;
3001 asection *bfd_section = section->the_bfd_section;
3003 return pc + bfd_section_vma (abfd, bfd_section)
3004 - bfd_section_lma (abfd, bfd_section);
3011 /* Function: symbol_overlayed_address
3012 Return one of two addresses (relative to the VMA or to the LMA),
3013 depending on whether the section is mapped or not. */
3016 symbol_overlayed_address (CORE_ADDR address, struct obj_section *section)
3018 if (overlay_debugging)
3020 /* If the symbol has no section, just return its regular address. */
3023 /* If the symbol's section is not an overlay, just return its
3025 if (!section_is_overlay (section))
3027 /* If the symbol's section is mapped, just return its address. */
3028 if (section_is_mapped (section))
3031 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3032 * then return its LOADED address rather than its vma address!!
3034 return overlay_unmapped_address (address, section);
3039 /* Function: find_pc_overlay (PC)
3040 Return the best-match overlay section for PC:
3041 If PC matches a mapped overlay section's VMA, return that section.
3042 Else if PC matches an unmapped section's VMA, return that section.
3043 Else if PC matches an unmapped section's LMA, return that section. */
3045 struct obj_section *
3046 find_pc_overlay (CORE_ADDR pc)
3048 struct objfile *objfile;
3049 struct obj_section *osect, *best_match = NULL;
3051 if (overlay_debugging)
3052 ALL_OBJSECTIONS (objfile, osect)
3053 if (section_is_overlay (osect))
3055 if (pc_in_mapped_range (pc, osect))
3057 if (section_is_mapped (osect))
3062 else if (pc_in_unmapped_range (pc, osect))
3068 /* Function: find_pc_mapped_section (PC)
3069 If PC falls into the VMA address range of an overlay section that is
3070 currently marked as MAPPED, return that section. Else return NULL. */
3072 struct obj_section *
3073 find_pc_mapped_section (CORE_ADDR pc)
3075 struct objfile *objfile;
3076 struct obj_section *osect;
3078 if (overlay_debugging)
3079 ALL_OBJSECTIONS (objfile, osect)
3080 if (pc_in_mapped_range (pc, osect) && section_is_mapped (osect))
3086 /* Function: list_overlays_command
3087 Print a list of mapped sections and their PC ranges. */
3090 list_overlays_command (char *args, int from_tty)
3093 struct objfile *objfile;
3094 struct obj_section *osect;
3096 if (overlay_debugging)
3097 ALL_OBJSECTIONS (objfile, osect)
3098 if (section_is_mapped (osect))
3100 struct gdbarch *gdbarch = get_objfile_arch (objfile);
3105 vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section);
3106 lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section);
3107 size = bfd_get_section_size (osect->the_bfd_section);
3108 name = bfd_section_name (objfile->obfd, osect->the_bfd_section);
3110 printf_filtered ("Section %s, loaded at ", name);
3111 fputs_filtered (paddress (gdbarch, lma), gdb_stdout);
3112 puts_filtered (" - ");
3113 fputs_filtered (paddress (gdbarch, lma + size), gdb_stdout);
3114 printf_filtered (", mapped at ");
3115 fputs_filtered (paddress (gdbarch, vma), gdb_stdout);
3116 puts_filtered (" - ");
3117 fputs_filtered (paddress (gdbarch, vma + size), gdb_stdout);
3118 puts_filtered ("\n");
3123 printf_filtered (_("No sections are mapped.\n"));
3126 /* Function: map_overlay_command
3127 Mark the named section as mapped (ie. residing at its VMA address). */
3130 map_overlay_command (char *args, int from_tty)
3132 struct objfile *objfile, *objfile2;
3133 struct obj_section *sec, *sec2;
3135 if (!overlay_debugging)
3136 error (_("Overlay debugging not enabled. Use "
3137 "either the 'overlay auto' or\n"
3138 "the 'overlay manual' command."));
3140 if (args == 0 || *args == 0)
3141 error (_("Argument required: name of an overlay section"));
3143 /* First, find a section matching the user supplied argument. */
3144 ALL_OBJSECTIONS (objfile, sec)
3145 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
3147 /* Now, check to see if the section is an overlay. */
3148 if (!section_is_overlay (sec))
3149 continue; /* not an overlay section */
3151 /* Mark the overlay as "mapped". */
3152 sec->ovly_mapped = 1;
3154 /* Next, make a pass and unmap any sections that are
3155 overlapped by this new section: */
3156 ALL_OBJSECTIONS (objfile2, sec2)
3157 if (sec2->ovly_mapped && sec != sec2 && sections_overlap (sec, sec2))
3160 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3161 bfd_section_name (objfile->obfd,
3162 sec2->the_bfd_section));
3163 sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2. */
3167 error (_("No overlay section called %s"), args);
3170 /* Function: unmap_overlay_command
3171 Mark the overlay section as unmapped
3172 (ie. resident in its LMA address range, rather than the VMA range). */
3175 unmap_overlay_command (char *args, int from_tty)
3177 struct objfile *objfile;
3178 struct obj_section *sec;
3180 if (!overlay_debugging)
3181 error (_("Overlay debugging not enabled. "
3182 "Use either the 'overlay auto' or\n"
3183 "the 'overlay manual' command."));
3185 if (args == 0 || *args == 0)
3186 error (_("Argument required: name of an overlay section"));
3188 /* First, find a section matching the user supplied argument. */
3189 ALL_OBJSECTIONS (objfile, sec)
3190 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
3192 if (!sec->ovly_mapped)
3193 error (_("Section %s is not mapped"), args);
3194 sec->ovly_mapped = 0;
3197 error (_("No overlay section called %s"), args);
3200 /* Function: overlay_auto_command
3201 A utility command to turn on overlay debugging.
3202 Possibly this should be done via a set/show command. */
3205 overlay_auto_command (char *args, int from_tty)
3207 overlay_debugging = ovly_auto;
3208 enable_overlay_breakpoints ();
3210 printf_unfiltered (_("Automatic overlay debugging enabled."));
3213 /* Function: overlay_manual_command
3214 A utility command to turn on overlay debugging.
3215 Possibly this should be done via a set/show command. */
3218 overlay_manual_command (char *args, int from_tty)
3220 overlay_debugging = ovly_on;
3221 disable_overlay_breakpoints ();
3223 printf_unfiltered (_("Overlay debugging enabled."));
3226 /* Function: overlay_off_command
3227 A utility command to turn on overlay debugging.
3228 Possibly this should be done via a set/show command. */
3231 overlay_off_command (char *args, int from_tty)
3233 overlay_debugging = ovly_off;
3234 disable_overlay_breakpoints ();
3236 printf_unfiltered (_("Overlay debugging disabled."));
3240 overlay_load_command (char *args, int from_tty)
3242 struct gdbarch *gdbarch = get_current_arch ();
3244 if (gdbarch_overlay_update_p (gdbarch))
3245 gdbarch_overlay_update (gdbarch, NULL);
3247 error (_("This target does not know how to read its overlay state."));
3250 /* Function: overlay_command
3251 A place-holder for a mis-typed command. */
3253 /* Command list chain containing all defined "overlay" subcommands. */
3254 struct cmd_list_element *overlaylist;
3257 overlay_command (char *args, int from_tty)
3260 ("\"overlay\" must be followed by the name of an overlay command.\n");
3261 help_list (overlaylist, "overlay ", -1, gdb_stdout);
3265 /* Target Overlays for the "Simplest" overlay manager:
3267 This is GDB's default target overlay layer. It works with the
3268 minimal overlay manager supplied as an example by Cygnus. The
3269 entry point is via a function pointer "gdbarch_overlay_update",
3270 so targets that use a different runtime overlay manager can
3271 substitute their own overlay_update function and take over the
3274 The overlay_update function pokes around in the target's data structures
3275 to see what overlays are mapped, and updates GDB's overlay mapping with
3278 In this simple implementation, the target data structures are as follows:
3279 unsigned _novlys; /# number of overlay sections #/
3280 unsigned _ovly_table[_novlys][4] = {
3281 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3282 {..., ..., ..., ...},
3284 unsigned _novly_regions; /# number of overlay regions #/
3285 unsigned _ovly_region_table[_novly_regions][3] = {
3286 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3289 These functions will attempt to update GDB's mappedness state in the
3290 symbol section table, based on the target's mappedness state.
3292 To do this, we keep a cached copy of the target's _ovly_table, and
3293 attempt to detect when the cached copy is invalidated. The main
3294 entry point is "simple_overlay_update(SECT), which looks up SECT in
3295 the cached table and re-reads only the entry for that section from
3296 the target (whenever possible). */
3298 /* Cached, dynamically allocated copies of the target data structures: */
3299 static unsigned (*cache_ovly_table)[4] = 0;
3300 static unsigned cache_novlys = 0;
3301 static CORE_ADDR cache_ovly_table_base = 0;
3304 VMA, SIZE, LMA, MAPPED
3307 /* Throw away the cached copy of _ovly_table. */
3309 simple_free_overlay_table (void)
3311 if (cache_ovly_table)
3312 xfree (cache_ovly_table);
3314 cache_ovly_table = NULL;
3315 cache_ovly_table_base = 0;
3318 /* Read an array of ints of size SIZE from the target into a local buffer.
3319 Convert to host order. int LEN is number of ints. */
3321 read_target_long_array (CORE_ADDR memaddr, unsigned int *myaddr,
3322 int len, int size, enum bfd_endian byte_order)
3324 /* FIXME (alloca): Not safe if array is very large. */
3325 gdb_byte *buf = alloca (len * size);
3328 read_memory (memaddr, buf, len * size);
3329 for (i = 0; i < len; i++)
3330 myaddr[i] = extract_unsigned_integer (size * i + buf, size, byte_order);
3333 /* Find and grab a copy of the target _ovly_table
3334 (and _novlys, which is needed for the table's size). */
3336 simple_read_overlay_table (void)
3338 struct minimal_symbol *novlys_msym, *ovly_table_msym;
3339 struct gdbarch *gdbarch;
3341 enum bfd_endian byte_order;
3343 simple_free_overlay_table ();
3344 novlys_msym = lookup_minimal_symbol ("_novlys", NULL, NULL);
3347 error (_("Error reading inferior's overlay table: "
3348 "couldn't find `_novlys' variable\n"
3349 "in inferior. Use `overlay manual' mode."));
3353 ovly_table_msym = lookup_minimal_symbol ("_ovly_table", NULL, NULL);
3354 if (! ovly_table_msym)
3356 error (_("Error reading inferior's overlay table: couldn't find "
3357 "`_ovly_table' array\n"
3358 "in inferior. Use `overlay manual' mode."));
3362 gdbarch = get_objfile_arch (msymbol_objfile (ovly_table_msym));
3363 word_size = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT;
3364 byte_order = gdbarch_byte_order (gdbarch);
3366 cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym),
3369 = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table));
3370 cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (ovly_table_msym);
3371 read_target_long_array (cache_ovly_table_base,
3372 (unsigned int *) cache_ovly_table,
3373 cache_novlys * 4, word_size, byte_order);
3375 return 1; /* SUCCESS */
3378 /* Function: simple_overlay_update_1
3379 A helper function for simple_overlay_update. Assuming a cached copy
3380 of _ovly_table exists, look through it to find an entry whose vma,
3381 lma and size match those of OSECT. Re-read the entry and make sure
3382 it still matches OSECT (else the table may no longer be valid).
3383 Set OSECT's mapped state to match the entry. Return: 1 for
3384 success, 0 for failure. */
3387 simple_overlay_update_1 (struct obj_section *osect)
3390 bfd *obfd = osect->objfile->obfd;
3391 asection *bsect = osect->the_bfd_section;
3392 struct gdbarch *gdbarch = get_objfile_arch (osect->objfile);
3393 int word_size = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT;
3394 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3396 size = bfd_get_section_size (osect->the_bfd_section);
3397 for (i = 0; i < cache_novlys; i++)
3398 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3399 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3400 /* && cache_ovly_table[i][SIZE] == size */ )
3402 read_target_long_array (cache_ovly_table_base + i * word_size,
3403 (unsigned int *) cache_ovly_table[i],
3404 4, word_size, byte_order);
3405 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3406 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3407 /* && cache_ovly_table[i][SIZE] == size */ )
3409 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3412 else /* Warning! Warning! Target's ovly table has changed! */
3418 /* Function: simple_overlay_update
3419 If OSECT is NULL, then update all sections' mapped state
3420 (after re-reading the entire target _ovly_table).
3421 If OSECT is non-NULL, then try to find a matching entry in the
3422 cached ovly_table and update only OSECT's mapped state.
3423 If a cached entry can't be found or the cache isn't valid, then
3424 re-read the entire cache, and go ahead and update all sections. */
3427 simple_overlay_update (struct obj_section *osect)
3429 struct objfile *objfile;
3431 /* Were we given an osect to look up? NULL means do all of them. */
3433 /* Have we got a cached copy of the target's overlay table? */
3434 if (cache_ovly_table != NULL)
3435 /* Does its cached location match what's currently in the symtab? */
3436 if (cache_ovly_table_base ==
3437 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table",
3439 /* Then go ahead and try to look up this single section in the
3441 if (simple_overlay_update_1 (osect))
3442 /* Found it! We're done. */
3445 /* Cached table no good: need to read the entire table anew.
3446 Or else we want all the sections, in which case it's actually
3447 more efficient to read the whole table in one block anyway. */
3449 if (! simple_read_overlay_table ())
3452 /* Now may as well update all sections, even if only one was requested. */
3453 ALL_OBJSECTIONS (objfile, osect)
3454 if (section_is_overlay (osect))
3457 bfd *obfd = osect->objfile->obfd;
3458 asection *bsect = osect->the_bfd_section;
3460 size = bfd_get_section_size (bsect);
3461 for (i = 0; i < cache_novlys; i++)
3462 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3463 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3464 /* && cache_ovly_table[i][SIZE] == size */ )
3465 { /* obj_section matches i'th entry in ovly_table. */
3466 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3467 break; /* finished with inner for loop: break out. */
3472 /* Set the output sections and output offsets for section SECTP in
3473 ABFD. The relocation code in BFD will read these offsets, so we
3474 need to be sure they're initialized. We map each section to itself,
3475 with no offset; this means that SECTP->vma will be honored. */
3478 symfile_dummy_outputs (bfd *abfd, asection *sectp, void *dummy)
3480 sectp->output_section = sectp;
3481 sectp->output_offset = 0;
3484 /* Default implementation for sym_relocate. */
3488 default_symfile_relocate (struct objfile *objfile, asection *sectp,
3491 bfd *abfd = objfile->obfd;
3493 /* We're only interested in sections with relocation
3495 if ((sectp->flags & SEC_RELOC) == 0)
3498 /* We will handle section offsets properly elsewhere, so relocate as if
3499 all sections begin at 0. */
3500 bfd_map_over_sections (abfd, symfile_dummy_outputs, NULL);
3502 return bfd_simple_get_relocated_section_contents (abfd, sectp, buf, NULL);
3505 /* Relocate the contents of a debug section SECTP in ABFD. The
3506 contents are stored in BUF if it is non-NULL, or returned in a
3507 malloc'd buffer otherwise.
3509 For some platforms and debug info formats, shared libraries contain
3510 relocations against the debug sections (particularly for DWARF-2;
3511 one affected platform is PowerPC GNU/Linux, although it depends on
3512 the version of the linker in use). Also, ELF object files naturally
3513 have unresolved relocations for their debug sections. We need to apply
3514 the relocations in order to get the locations of symbols correct.
3515 Another example that may require relocation processing, is the
3516 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3520 symfile_relocate_debug_section (struct objfile *objfile,
3521 asection *sectp, bfd_byte *buf)
3523 gdb_assert (objfile->sf->sym_relocate);
3525 return (*objfile->sf->sym_relocate) (objfile, sectp, buf);
3528 struct symfile_segment_data *
3529 get_symfile_segment_data (bfd *abfd)
3531 const struct sym_fns *sf = find_sym_fns (abfd);
3536 return sf->sym_segments (abfd);
3540 free_symfile_segment_data (struct symfile_segment_data *data)
3542 xfree (data->segment_bases);
3543 xfree (data->segment_sizes);
3544 xfree (data->segment_info);
3550 - DATA, containing segment addresses from the object file ABFD, and
3551 the mapping from ABFD's sections onto the segments that own them,
3553 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3554 segment addresses reported by the target,
3555 store the appropriate offsets for each section in OFFSETS.
3557 If there are fewer entries in SEGMENT_BASES than there are segments
3558 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3560 If there are more entries, then ignore the extra. The target may
3561 not be able to distinguish between an empty data segment and a
3562 missing data segment; a missing text segment is less plausible. */
3564 symfile_map_offsets_to_segments (bfd *abfd, struct symfile_segment_data *data,
3565 struct section_offsets *offsets,
3566 int num_segment_bases,
3567 const CORE_ADDR *segment_bases)
3572 /* It doesn't make sense to call this function unless you have some
3573 segment base addresses. */
3574 gdb_assert (num_segment_bases > 0);
3576 /* If we do not have segment mappings for the object file, we
3577 can not relocate it by segments. */
3578 gdb_assert (data != NULL);
3579 gdb_assert (data->num_segments > 0);
3581 for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next)
3583 int which = data->segment_info[i];
3585 gdb_assert (0 <= which && which <= data->num_segments);
3587 /* Don't bother computing offsets for sections that aren't
3588 loaded as part of any segment. */
3592 /* Use the last SEGMENT_BASES entry as the address of any extra
3593 segments mentioned in DATA->segment_info. */
3594 if (which > num_segment_bases)
3595 which = num_segment_bases;
3597 offsets->offsets[i] = (segment_bases[which - 1]
3598 - data->segment_bases[which - 1]);
3605 symfile_find_segment_sections (struct objfile *objfile)
3607 bfd *abfd = objfile->obfd;
3610 struct symfile_segment_data *data;
3612 data = get_symfile_segment_data (objfile->obfd);
3616 if (data->num_segments != 1 && data->num_segments != 2)
3618 free_symfile_segment_data (data);
3622 for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next)
3624 int which = data->segment_info[i];
3628 if (objfile->sect_index_text == -1)
3629 objfile->sect_index_text = sect->index;
3631 if (objfile->sect_index_rodata == -1)
3632 objfile->sect_index_rodata = sect->index;
3634 else if (which == 2)
3636 if (objfile->sect_index_data == -1)
3637 objfile->sect_index_data = sect->index;
3639 if (objfile->sect_index_bss == -1)
3640 objfile->sect_index_bss = sect->index;
3644 free_symfile_segment_data (data);
3648 _initialize_symfile (void)
3650 struct cmd_list_element *c;
3652 c = add_cmd ("symbol-file", class_files, symbol_file_command, _("\
3653 Load symbol table from executable file FILE.\n\
3654 The `file' command can also load symbol tables, as well as setting the file\n\
3655 to execute."), &cmdlist);
3656 set_cmd_completer (c, filename_completer);
3658 c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command, _("\
3659 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3660 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR>\
3661 ...]\nADDR is the starting address of the file's text.\n\
3662 The optional arguments are section-name section-address pairs and\n\
3663 should be specified if the data and bss segments are not contiguous\n\
3664 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3666 set_cmd_completer (c, filename_completer);
3668 c = add_cmd ("load", class_files, load_command, _("\
3669 Dynamically load FILE into the running program, and record its symbols\n\
3670 for access from GDB.\n\
3671 A load OFFSET may also be given."), &cmdlist);
3672 set_cmd_completer (c, filename_completer);
3674 add_setshow_boolean_cmd ("symbol-reloading", class_support,
3675 &symbol_reloading, _("\
3676 Set dynamic symbol table reloading multiple times in one run."), _("\
3677 Show dynamic symbol table reloading multiple times in one run."), NULL,
3679 show_symbol_reloading,
3680 &setlist, &showlist);
3682 add_prefix_cmd ("overlay", class_support, overlay_command,
3683 _("Commands for debugging overlays."), &overlaylist,
3684 "overlay ", 0, &cmdlist);
3686 add_com_alias ("ovly", "overlay", class_alias, 1);
3687 add_com_alias ("ov", "overlay", class_alias, 1);
3689 add_cmd ("map-overlay", class_support, map_overlay_command,
3690 _("Assert that an overlay section is mapped."), &overlaylist);
3692 add_cmd ("unmap-overlay", class_support, unmap_overlay_command,
3693 _("Assert that an overlay section is unmapped."), &overlaylist);
3695 add_cmd ("list-overlays", class_support, list_overlays_command,
3696 _("List mappings of overlay sections."), &overlaylist);
3698 add_cmd ("manual", class_support, overlay_manual_command,
3699 _("Enable overlay debugging."), &overlaylist);
3700 add_cmd ("off", class_support, overlay_off_command,
3701 _("Disable overlay debugging."), &overlaylist);
3702 add_cmd ("auto", class_support, overlay_auto_command,
3703 _("Enable automatic overlay debugging."), &overlaylist);
3704 add_cmd ("load-target", class_support, overlay_load_command,
3705 _("Read the overlay mapping state from the target."), &overlaylist);
3707 /* Filename extension to source language lookup table: */
3708 init_filename_language_table ();
3709 add_setshow_string_noescape_cmd ("extension-language", class_files,
3711 Set mapping between filename extension and source language."), _("\
3712 Show mapping between filename extension and source language."), _("\
3713 Usage: set extension-language .foo bar"),
3714 set_ext_lang_command,
3716 &setlist, &showlist);
3718 add_info ("extensions", info_ext_lang_command,
3719 _("All filename extensions associated with a source language."));
3721 add_setshow_optional_filename_cmd ("debug-file-directory", class_support,
3722 &debug_file_directory, _("\
3723 Set the directories where separate debug symbols are searched for."), _("\
3724 Show the directories where separate debug symbols are searched for."), _("\
3725 Separate debug symbols are first searched for in the same\n\
3726 directory as the binary, then in the `" DEBUG_SUBDIRECTORY "' subdirectory,\n\
3727 and lastly at the path of the directory of the binary with\n\
3728 each global debug-file-directory component prepended."),
3730 show_debug_file_directory,
3731 &setlist, &showlist);