1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
4 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
6 Contributed by Cygnus Support, using pieces from other GDB modules.
8 This file is part of GDB.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 59 Temple Place - Suite 330,
23 Boston, MA 02111-1307, USA. */
37 #include "breakpoint.h"
39 #include "complaints.h"
41 #include "inferior.h" /* for write_pc */
42 #include "filenames.h" /* for DOSish file names */
43 #include "gdb-stabs.h"
44 #include "gdb_obstack.h"
45 #include "completer.h"
48 #include "readline/readline.h"
49 #include "gdb_assert.h"
52 #include <sys/types.h>
54 #include "gdb_string.h"
63 int (*deprecated_ui_load_progress_hook) (const char *section, unsigned long num);
64 void (*deprecated_show_load_progress) (const char *section,
65 unsigned long section_sent,
66 unsigned long section_size,
67 unsigned long total_sent,
68 unsigned long total_size);
69 void (*deprecated_pre_add_symbol_hook) (const char *);
70 void (*deprecated_post_add_symbol_hook) (void);
71 void (*deprecated_target_new_objfile_hook) (struct objfile *);
73 static void clear_symtab_users_cleanup (void *ignore);
75 /* Global variables owned by this file */
76 int readnow_symbol_files; /* Read full symbols immediately */
78 /* External variables and functions referenced. */
80 extern void report_transfer_performance (unsigned long, time_t, time_t);
82 /* Functions this file defines */
85 static int simple_read_overlay_region_table (void);
86 static void simple_free_overlay_region_table (void);
89 static void set_initial_language (void);
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 static void add_shared_symbol_files_command (char *, int);
99 static void reread_separate_symbols (struct objfile *objfile);
101 static void cashier_psymtab (struct partial_symtab *);
103 bfd *symfile_bfd_open (char *);
105 int get_section_index (struct objfile *, char *);
107 static void find_sym_fns (struct objfile *);
109 static void decrement_reading_symtab (void *);
111 static void overlay_invalidate_all (void);
113 static int overlay_is_mapped (struct obj_section *);
115 void list_overlays_command (char *, int);
117 void map_overlay_command (char *, int);
119 void unmap_overlay_command (char *, int);
121 static void overlay_auto_command (char *, int);
123 static void overlay_manual_command (char *, int);
125 static void overlay_off_command (char *, int);
127 static void overlay_load_command (char *, int);
129 static void overlay_command (char *, int);
131 static void simple_free_overlay_table (void);
133 static void read_target_long_array (CORE_ADDR, unsigned int *, int);
135 static int simple_read_overlay_table (void);
137 static int simple_overlay_update_1 (struct obj_section *);
139 static void add_filename_language (char *ext, enum language lang);
141 static void info_ext_lang_command (char *args, int from_tty);
143 static char *find_separate_debug_file (struct objfile *objfile);
145 static void init_filename_language_table (void);
147 void _initialize_symfile (void);
149 /* List of all available sym_fns. On gdb startup, each object file reader
150 calls add_symtab_fns() to register information on each format it is
153 static struct sym_fns *symtab_fns = NULL;
155 /* Flag for whether user will be reloading symbols multiple times.
156 Defaults to ON for VxWorks, otherwise OFF. */
158 #ifdef SYMBOL_RELOADING_DEFAULT
159 int symbol_reloading = SYMBOL_RELOADING_DEFAULT;
161 int symbol_reloading = 0;
164 show_symbol_reloading (struct ui_file *file, int from_tty,
165 struct cmd_list_element *c, const char *value)
167 fprintf_filtered (file, _("\
168 Dynamic symbol table reloading multiple times in one run is %s.\n"),
173 /* If non-zero, shared library symbols will be added automatically
174 when the inferior is created, new libraries are loaded, or when
175 attaching to the inferior. This is almost always what users will
176 want to have happen; but for very large programs, the startup time
177 will be excessive, and so if this is a problem, the user can clear
178 this flag and then add the shared library symbols as needed. Note
179 that there is a potential for confusion, since if the shared
180 library symbols are not loaded, commands like "info fun" will *not*
181 report all the functions that are actually present. */
183 int auto_solib_add = 1;
185 /* For systems that support it, a threshold size in megabytes. If
186 automatically adding a new library's symbol table to those already
187 known to the debugger would cause the total shared library symbol
188 size to exceed this threshhold, then the shlib's symbols are not
189 added. The threshold is ignored if the user explicitly asks for a
190 shlib to be added, such as when using the "sharedlibrary"
193 int auto_solib_limit;
196 /* This compares two partial symbols by names, using strcmp_iw_ordered
197 for the comparison. */
200 compare_psymbols (const void *s1p, const void *s2p)
202 struct partial_symbol *const *s1 = s1p;
203 struct partial_symbol *const *s2 = s2p;
205 return strcmp_iw_ordered (SYMBOL_SEARCH_NAME (*s1),
206 SYMBOL_SEARCH_NAME (*s2));
210 sort_pst_symbols (struct partial_symtab *pst)
212 /* Sort the global list; don't sort the static list */
214 qsort (pst->objfile->global_psymbols.list + pst->globals_offset,
215 pst->n_global_syms, sizeof (struct partial_symbol *),
219 /* Make a null terminated copy of the string at PTR with SIZE characters in
220 the obstack pointed to by OBSTACKP . Returns the address of the copy.
221 Note that the string at PTR does not have to be null terminated, I.E. it
222 may be part of a larger string and we are only saving a substring. */
225 obsavestring (const char *ptr, int size, struct obstack *obstackp)
227 char *p = (char *) obstack_alloc (obstackp, size + 1);
228 /* Open-coded memcpy--saves function call time. These strings are usually
229 short. FIXME: Is this really still true with a compiler that can
232 const char *p1 = ptr;
234 const char *end = ptr + size;
242 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
243 in the obstack pointed to by OBSTACKP. */
246 obconcat (struct obstack *obstackp, const char *s1, const char *s2,
249 int len = strlen (s1) + strlen (s2) + strlen (s3) + 1;
250 char *val = (char *) obstack_alloc (obstackp, len);
257 /* True if we are nested inside psymtab_to_symtab. */
259 int currently_reading_symtab = 0;
262 decrement_reading_symtab (void *dummy)
264 currently_reading_symtab--;
267 /* Get the symbol table that corresponds to a partial_symtab.
268 This is fast after the first time you do it. In fact, there
269 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
273 psymtab_to_symtab (struct partial_symtab *pst)
275 /* If it's been looked up before, return it. */
279 /* If it has not yet been read in, read it. */
282 struct cleanup *back_to = make_cleanup (decrement_reading_symtab, NULL);
283 currently_reading_symtab++;
284 (*pst->read_symtab) (pst);
285 do_cleanups (back_to);
291 /* Remember the lowest-addressed loadable section we've seen.
292 This function is called via bfd_map_over_sections.
294 In case of equal vmas, the section with the largest size becomes the
295 lowest-addressed loadable section.
297 If the vmas and sizes are equal, the last section is considered the
298 lowest-addressed loadable section. */
301 find_lowest_section (bfd *abfd, asection *sect, void *obj)
303 asection **lowest = (asection **) obj;
305 if (0 == (bfd_get_section_flags (abfd, sect) & SEC_LOAD))
308 *lowest = sect; /* First loadable section */
309 else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect))
310 *lowest = sect; /* A lower loadable section */
311 else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect)
312 && (bfd_section_size (abfd, (*lowest))
313 <= bfd_section_size (abfd, sect)))
317 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
319 struct section_addr_info *
320 alloc_section_addr_info (size_t num_sections)
322 struct section_addr_info *sap;
325 size = (sizeof (struct section_addr_info)
326 + sizeof (struct other_sections) * (num_sections - 1));
327 sap = (struct section_addr_info *) xmalloc (size);
328 memset (sap, 0, size);
329 sap->num_sections = num_sections;
335 /* Return a freshly allocated copy of ADDRS. The section names, if
336 any, are also freshly allocated copies of those in ADDRS. */
337 struct section_addr_info *
338 copy_section_addr_info (struct section_addr_info *addrs)
340 struct section_addr_info *copy
341 = alloc_section_addr_info (addrs->num_sections);
344 copy->num_sections = addrs->num_sections;
345 for (i = 0; i < addrs->num_sections; i++)
347 copy->other[i].addr = addrs->other[i].addr;
348 if (addrs->other[i].name)
349 copy->other[i].name = xstrdup (addrs->other[i].name);
351 copy->other[i].name = NULL;
352 copy->other[i].sectindex = addrs->other[i].sectindex;
360 /* Build (allocate and populate) a section_addr_info struct from
361 an existing section table. */
363 extern struct section_addr_info *
364 build_section_addr_info_from_section_table (const struct section_table *start,
365 const struct section_table *end)
367 struct section_addr_info *sap;
368 const struct section_table *stp;
371 sap = alloc_section_addr_info (end - start);
373 for (stp = start, oidx = 0; stp != end; stp++)
375 if (bfd_get_section_flags (stp->bfd,
376 stp->the_bfd_section) & (SEC_ALLOC | SEC_LOAD)
377 && oidx < end - start)
379 sap->other[oidx].addr = stp->addr;
380 sap->other[oidx].name
381 = xstrdup (bfd_section_name (stp->bfd, stp->the_bfd_section));
382 sap->other[oidx].sectindex = stp->the_bfd_section->index;
391 /* Free all memory allocated by build_section_addr_info_from_section_table. */
394 free_section_addr_info (struct section_addr_info *sap)
398 for (idx = 0; idx < sap->num_sections; idx++)
399 if (sap->other[idx].name)
400 xfree (sap->other[idx].name);
405 /* Initialize OBJFILE's sect_index_* members. */
407 init_objfile_sect_indices (struct objfile *objfile)
412 sect = bfd_get_section_by_name (objfile->obfd, ".text");
414 objfile->sect_index_text = sect->index;
416 sect = bfd_get_section_by_name (objfile->obfd, ".data");
418 objfile->sect_index_data = sect->index;
420 sect = bfd_get_section_by_name (objfile->obfd, ".bss");
422 objfile->sect_index_bss = sect->index;
424 sect = bfd_get_section_by_name (objfile->obfd, ".rodata");
426 objfile->sect_index_rodata = sect->index;
428 /* This is where things get really weird... We MUST have valid
429 indices for the various sect_index_* members or gdb will abort.
430 So if for example, there is no ".text" section, we have to
431 accomodate that. Except when explicitly adding symbol files at
432 some address, section_offsets contains nothing but zeros, so it
433 doesn't matter which slot in section_offsets the individual
434 sect_index_* members index into. So if they are all zero, it is
435 safe to just point all the currently uninitialized indices to the
438 for (i = 0; i < objfile->num_sections; i++)
440 if (ANOFFSET (objfile->section_offsets, i) != 0)
445 if (i == objfile->num_sections)
447 if (objfile->sect_index_text == -1)
448 objfile->sect_index_text = 0;
449 if (objfile->sect_index_data == -1)
450 objfile->sect_index_data = 0;
451 if (objfile->sect_index_bss == -1)
452 objfile->sect_index_bss = 0;
453 if (objfile->sect_index_rodata == -1)
454 objfile->sect_index_rodata = 0;
459 /* Parse the user's idea of an offset for dynamic linking, into our idea
460 of how to represent it for fast symbol reading. This is the default
461 version of the sym_fns.sym_offsets function for symbol readers that
462 don't need to do anything special. It allocates a section_offsets table
463 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
466 default_symfile_offsets (struct objfile *objfile,
467 struct section_addr_info *addrs)
471 objfile->num_sections = bfd_count_sections (objfile->obfd);
472 objfile->section_offsets = (struct section_offsets *)
473 obstack_alloc (&objfile->objfile_obstack,
474 SIZEOF_N_SECTION_OFFSETS (objfile->num_sections));
475 memset (objfile->section_offsets, 0,
476 SIZEOF_N_SECTION_OFFSETS (objfile->num_sections));
478 /* Now calculate offsets for section that were specified by the
480 for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++)
482 struct other_sections *osp ;
484 osp = &addrs->other[i] ;
488 /* Record all sections in offsets */
489 /* The section_offsets in the objfile are here filled in using
491 (objfile->section_offsets)->offsets[osp->sectindex] = osp->addr;
494 /* Remember the bfd indexes for the .text, .data, .bss and
496 init_objfile_sect_indices (objfile);
500 /* Process a symbol file, as either the main file or as a dynamically
503 OBJFILE is where the symbols are to be read from.
505 ADDRS is the list of section load addresses. If the user has given
506 an 'add-symbol-file' command, then this is the list of offsets and
507 addresses he or she provided as arguments to the command; or, if
508 we're handling a shared library, these are the actual addresses the
509 sections are loaded at, according to the inferior's dynamic linker
510 (as gleaned by GDB's shared library code). We convert each address
511 into an offset from the section VMA's as it appears in the object
512 file, and then call the file's sym_offsets function to convert this
513 into a format-specific offset table --- a `struct section_offsets'.
514 If ADDRS is non-zero, OFFSETS must be zero.
516 OFFSETS is a table of section offsets already in the right
517 format-specific representation. NUM_OFFSETS is the number of
518 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
519 assume this is the proper table the call to sym_offsets described
520 above would produce. Instead of calling sym_offsets, we just dump
521 it right into objfile->section_offsets. (When we're re-reading
522 symbols from an objfile, we don't have the original load address
523 list any more; all we have is the section offset table.) If
524 OFFSETS is non-zero, ADDRS must be zero.
526 MAINLINE is nonzero if this is the main symbol file, or zero if
527 it's an extra symbol file such as dynamically loaded code.
529 VERBO is nonzero if the caller has printed a verbose message about
530 the symbol reading (and complaints can be more terse about it). */
533 syms_from_objfile (struct objfile *objfile,
534 struct section_addr_info *addrs,
535 struct section_offsets *offsets,
540 struct section_addr_info *local_addr = NULL;
541 struct cleanup *old_chain;
543 gdb_assert (! (addrs && offsets));
545 init_entry_point_info (objfile);
546 find_sym_fns (objfile);
548 if (objfile->sf == NULL)
549 return; /* No symbols. */
551 /* Make sure that partially constructed symbol tables will be cleaned up
552 if an error occurs during symbol reading. */
553 old_chain = make_cleanup_free_objfile (objfile);
555 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
556 list. We now establish the convention that an addr of zero means
557 no load address was specified. */
558 if (! addrs && ! offsets)
561 = alloc_section_addr_info (bfd_count_sections (objfile->obfd));
562 make_cleanup (xfree, local_addr);
566 /* Now either addrs or offsets is non-zero. */
570 /* We will modify the main symbol table, make sure that all its users
571 will be cleaned up if an error occurs during symbol reading. */
572 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
574 /* Since no error yet, throw away the old symbol table. */
576 if (symfile_objfile != NULL)
578 free_objfile (symfile_objfile);
579 symfile_objfile = NULL;
582 /* Currently we keep symbols from the add-symbol-file command.
583 If the user wants to get rid of them, they should do "symbol-file"
584 without arguments first. Not sure this is the best behavior
587 (*objfile->sf->sym_new_init) (objfile);
590 /* Convert addr into an offset rather than an absolute address.
591 We find the lowest address of a loaded segment in the objfile,
592 and assume that <addr> is where that got loaded.
594 We no longer warn if the lowest section is not a text segment (as
595 happens for the PA64 port. */
596 if (!mainline && addrs && addrs->other[0].name)
598 asection *lower_sect;
600 CORE_ADDR lower_offset;
603 /* Find lowest loadable section to be used as starting point for
604 continguous sections. FIXME!! won't work without call to find
605 .text first, but this assumes text is lowest section. */
606 lower_sect = bfd_get_section_by_name (objfile->obfd, ".text");
607 if (lower_sect == NULL)
608 bfd_map_over_sections (objfile->obfd, find_lowest_section,
610 if (lower_sect == NULL)
611 warning (_("no loadable sections found in added symbol-file %s"),
614 if ((bfd_get_section_flags (objfile->obfd, lower_sect) & SEC_CODE) == 0)
615 warning (_("Lowest section in %s is %s at %s"),
617 bfd_section_name (objfile->obfd, lower_sect),
618 paddr (bfd_section_vma (objfile->obfd, lower_sect)));
619 if (lower_sect != NULL)
620 lower_offset = bfd_section_vma (objfile->obfd, lower_sect);
624 /* Calculate offsets for the loadable sections.
625 FIXME! Sections must be in order of increasing loadable section
626 so that contiguous sections can use the lower-offset!!!
628 Adjust offsets if the segments are not contiguous.
629 If the section is contiguous, its offset should be set to
630 the offset of the highest loadable section lower than it
631 (the loadable section directly below it in memory).
632 this_offset = lower_offset = lower_addr - lower_orig_addr */
634 for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++)
636 if (addrs->other[i].addr != 0)
638 sect = bfd_get_section_by_name (objfile->obfd,
639 addrs->other[i].name);
643 -= bfd_section_vma (objfile->obfd, sect);
644 lower_offset = addrs->other[i].addr;
645 /* This is the index used by BFD. */
646 addrs->other[i].sectindex = sect->index ;
650 warning (_("section %s not found in %s"),
651 addrs->other[i].name,
653 addrs->other[i].addr = 0;
657 addrs->other[i].addr = lower_offset;
661 /* Initialize symbol reading routines for this objfile, allow complaints to
662 appear for this new file, and record how verbose to be, then do the
663 initial symbol reading for this file. */
665 (*objfile->sf->sym_init) (objfile);
666 clear_complaints (&symfile_complaints, 1, verbo);
669 (*objfile->sf->sym_offsets) (objfile, addrs);
672 size_t size = SIZEOF_N_SECTION_OFFSETS (num_offsets);
674 /* Just copy in the offset table directly as given to us. */
675 objfile->num_sections = num_offsets;
676 objfile->section_offsets
677 = ((struct section_offsets *)
678 obstack_alloc (&objfile->objfile_obstack, size));
679 memcpy (objfile->section_offsets, offsets, size);
681 init_objfile_sect_indices (objfile);
684 #ifndef DEPRECATED_IBM6000_TARGET
685 /* This is a SVR4/SunOS specific hack, I think. In any event, it
686 screws RS/6000. sym_offsets should be doing this sort of thing,
687 because it knows the mapping between bfd sections and
689 /* This is a hack. As far as I can tell, section offsets are not
690 target dependent. They are all set to addr with a couple of
691 exceptions. The exceptions are sysvr4 shared libraries, whose
692 offsets are kept in solib structures anyway and rs6000 xcoff
693 which handles shared libraries in a completely unique way.
695 Section offsets are built similarly, except that they are built
696 by adding addr in all cases because there is no clear mapping
697 from section_offsets into actual sections. Note that solib.c
698 has a different algorithm for finding section offsets.
700 These should probably all be collapsed into some target
701 independent form of shared library support. FIXME. */
705 struct obj_section *s;
707 /* Map section offsets in "addr" back to the object's
708 sections by comparing the section names with bfd's
709 section names. Then adjust the section address by
710 the offset. */ /* for gdb/13815 */
712 ALL_OBJFILE_OSECTIONS (objfile, s)
714 CORE_ADDR s_addr = 0;
718 !s_addr && i < addrs->num_sections && addrs->other[i].name;
720 if (strcmp (bfd_section_name (s->objfile->obfd,
722 addrs->other[i].name) == 0)
723 s_addr = addrs->other[i].addr; /* end added for gdb/13815 */
725 s->addr -= s->offset;
727 s->endaddr -= s->offset;
728 s->endaddr += s_addr;
732 #endif /* not DEPRECATED_IBM6000_TARGET */
734 (*objfile->sf->sym_read) (objfile, mainline);
736 /* Don't allow char * to have a typename (else would get caddr_t).
737 Ditto void *. FIXME: Check whether this is now done by all the
738 symbol readers themselves (many of them now do), and if so remove
741 TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0;
742 TYPE_NAME (lookup_pointer_type (builtin_type_void)) = 0;
744 /* Mark the objfile has having had initial symbol read attempted. Note
745 that this does not mean we found any symbols... */
747 objfile->flags |= OBJF_SYMS;
749 /* Discard cleanups as symbol reading was successful. */
751 discard_cleanups (old_chain);
754 /* Perform required actions after either reading in the initial
755 symbols for a new objfile, or mapping in the symbols from a reusable
759 new_symfile_objfile (struct objfile *objfile, int mainline, int verbo)
762 /* If this is the main symbol file we have to clean up all users of the
763 old main symbol file. Otherwise it is sufficient to fixup all the
764 breakpoints that may have been redefined by this symbol file. */
767 /* OK, make it the "real" symbol file. */
768 symfile_objfile = objfile;
770 clear_symtab_users ();
774 breakpoint_re_set ();
777 /* We're done reading the symbol file; finish off complaints. */
778 clear_complaints (&symfile_complaints, 0, verbo);
781 /* Process a symbol file, as either the main file or as a dynamically
784 ABFD is a BFD already open on the file, as from symfile_bfd_open.
785 This BFD will be closed on error, and is always consumed by this function.
787 FROM_TTY says how verbose to be.
789 MAINLINE specifies whether this is the main symbol file, or whether
790 it's an extra symbol file such as dynamically loaded code.
792 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
793 syms_from_objfile, above. ADDRS is ignored when MAINLINE is
796 Upon success, returns a pointer to the objfile that was added.
797 Upon failure, jumps back to command level (never returns). */
798 static struct objfile *
799 symbol_file_add_with_addrs_or_offsets (bfd *abfd, int from_tty,
800 struct section_addr_info *addrs,
801 struct section_offsets *offsets,
803 int mainline, int flags)
805 struct objfile *objfile;
806 struct partial_symtab *psymtab;
808 struct section_addr_info *orig_addrs = NULL;
809 struct cleanup *my_cleanups;
810 const char *name = bfd_get_filename (abfd);
812 my_cleanups = make_cleanup_bfd_close (abfd);
814 /* Give user a chance to burp if we'd be
815 interactively wiping out any existing symbols. */
817 if ((have_full_symbols () || have_partial_symbols ())
820 && !query ("Load new symbol table from \"%s\"? ", name))
821 error (_("Not confirmed."));
823 objfile = allocate_objfile (abfd, flags);
824 discard_cleanups (my_cleanups);
828 orig_addrs = copy_section_addr_info (addrs);
829 make_cleanup_free_section_addr_info (orig_addrs);
832 /* We either created a new mapped symbol table, mapped an existing
833 symbol table file which has not had initial symbol reading
834 performed, or need to read an unmapped symbol table. */
835 if (from_tty || info_verbose)
837 if (deprecated_pre_add_symbol_hook)
838 deprecated_pre_add_symbol_hook (name);
841 printf_unfiltered (_("Reading symbols from %s..."), name);
843 gdb_flush (gdb_stdout);
846 syms_from_objfile (objfile, addrs, offsets, num_offsets,
849 /* We now have at least a partial symbol table. Check to see if the
850 user requested that all symbols be read on initial access via either
851 the gdb startup command line or on a per symbol file basis. Expand
852 all partial symbol tables for this objfile if so. */
854 if ((flags & OBJF_READNOW) || readnow_symbol_files)
856 if (from_tty || info_verbose)
858 printf_unfiltered (_("expanding to full symbols..."));
860 gdb_flush (gdb_stdout);
863 for (psymtab = objfile->psymtabs;
865 psymtab = psymtab->next)
867 psymtab_to_symtab (psymtab);
871 debugfile = find_separate_debug_file (objfile);
876 objfile->separate_debug_objfile
877 = symbol_file_add (debugfile, from_tty, orig_addrs, 0, flags);
881 objfile->separate_debug_objfile
882 = symbol_file_add (debugfile, from_tty, NULL, 0, flags);
884 objfile->separate_debug_objfile->separate_debug_objfile_backlink
887 /* Put the separate debug object before the normal one, this is so that
888 usage of the ALL_OBJFILES_SAFE macro will stay safe. */
889 put_objfile_before (objfile->separate_debug_objfile, objfile);
894 if (!have_partial_symbols () && !have_full_symbols ())
897 printf_filtered (_("(no debugging symbols found)"));
898 if (from_tty || info_verbose)
899 printf_filtered ("...");
901 printf_filtered ("\n");
905 if (from_tty || info_verbose)
907 if (deprecated_post_add_symbol_hook)
908 deprecated_post_add_symbol_hook ();
911 printf_unfiltered (_("done.\n"));
915 /* We print some messages regardless of whether 'from_tty ||
916 info_verbose' is true, so make sure they go out at the right
918 gdb_flush (gdb_stdout);
920 do_cleanups (my_cleanups);
922 if (objfile->sf == NULL)
923 return objfile; /* No symbols. */
925 new_symfile_objfile (objfile, mainline, from_tty);
927 if (deprecated_target_new_objfile_hook)
928 deprecated_target_new_objfile_hook (objfile);
930 bfd_cache_close_all ();
935 /* Process the symbol file ABFD, as either the main file or as a
936 dynamically loaded file.
938 See symbol_file_add_with_addrs_or_offsets's comments for
941 symbol_file_add_from_bfd (bfd *abfd, int from_tty,
942 struct section_addr_info *addrs,
943 int mainline, int flags)
945 return symbol_file_add_with_addrs_or_offsets (abfd,
946 from_tty, addrs, 0, 0,
951 /* Process a symbol file, as either the main file or as a dynamically
952 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
955 symbol_file_add (char *name, int from_tty, struct section_addr_info *addrs,
956 int mainline, int flags)
958 return symbol_file_add_from_bfd (symfile_bfd_open (name), from_tty,
959 addrs, mainline, flags);
963 /* Call symbol_file_add() with default values and update whatever is
964 affected by the loading of a new main().
965 Used when the file is supplied in the gdb command line
966 and by some targets with special loading requirements.
967 The auxiliary function, symbol_file_add_main_1(), has the flags
968 argument for the switches that can only be specified in the symbol_file
972 symbol_file_add_main (char *args, int from_tty)
974 symbol_file_add_main_1 (args, from_tty, 0);
978 symbol_file_add_main_1 (char *args, int from_tty, int flags)
980 symbol_file_add (args, from_tty, NULL, 1, flags);
982 /* Getting new symbols may change our opinion about
983 what is frameless. */
984 reinit_frame_cache ();
986 set_initial_language ();
990 symbol_file_clear (int from_tty)
992 if ((have_full_symbols () || have_partial_symbols ())
994 && !query ("Discard symbol table from `%s'? ",
995 symfile_objfile->name))
996 error (_("Not confirmed."));
997 free_all_objfiles ();
999 /* solib descriptors may have handles to objfiles. Since their
1000 storage has just been released, we'd better wipe the solib
1001 descriptors as well.
1003 #if defined(SOLIB_RESTART)
1007 symfile_objfile = NULL;
1009 printf_unfiltered (_("No symbol file now.\n"));
1013 get_debug_link_info (struct objfile *objfile, unsigned long *crc32_out)
1016 bfd_size_type debuglink_size;
1017 unsigned long crc32;
1022 sect = bfd_get_section_by_name (objfile->obfd, ".gnu_debuglink");
1027 debuglink_size = bfd_section_size (objfile->obfd, sect);
1029 contents = xmalloc (debuglink_size);
1030 bfd_get_section_contents (objfile->obfd, sect, contents,
1031 (file_ptr)0, (bfd_size_type)debuglink_size);
1033 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1034 crc_offset = strlen (contents) + 1;
1035 crc_offset = (crc_offset + 3) & ~3;
1037 crc32 = bfd_get_32 (objfile->obfd, (bfd_byte *) (contents + crc_offset));
1044 separate_debug_file_exists (const char *name, unsigned long crc)
1046 unsigned long file_crc = 0;
1048 char buffer[8*1024];
1051 fd = open (name, O_RDONLY | O_BINARY);
1055 while ((count = read (fd, buffer, sizeof (buffer))) > 0)
1056 file_crc = gnu_debuglink_crc32 (file_crc, buffer, count);
1060 return crc == file_crc;
1063 static char *debug_file_directory = NULL;
1065 show_debug_file_directory (struct ui_file *file, int from_tty,
1066 struct cmd_list_element *c, const char *value)
1068 fprintf_filtered (file, _("\
1069 The directory where separate debug symbols are searched for is \"%s\".\n"),
1073 #if ! defined (DEBUG_SUBDIRECTORY)
1074 #define DEBUG_SUBDIRECTORY ".debug"
1078 find_separate_debug_file (struct objfile *objfile)
1085 bfd_size_type debuglink_size;
1086 unsigned long crc32;
1089 basename = get_debug_link_info (objfile, &crc32);
1091 if (basename == NULL)
1094 dir = xstrdup (objfile->name);
1096 /* Strip off the final filename part, leaving the directory name,
1097 followed by a slash. Objfile names should always be absolute and
1098 tilde-expanded, so there should always be a slash in there
1100 for (i = strlen(dir) - 1; i >= 0; i--)
1102 if (IS_DIR_SEPARATOR (dir[i]))
1105 gdb_assert (i >= 0 && IS_DIR_SEPARATOR (dir[i]));
1108 debugfile = alloca (strlen (debug_file_directory) + 1
1110 + strlen (DEBUG_SUBDIRECTORY)
1115 /* First try in the same directory as the original file. */
1116 strcpy (debugfile, dir);
1117 strcat (debugfile, basename);
1119 if (separate_debug_file_exists (debugfile, crc32))
1123 return xstrdup (debugfile);
1126 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1127 strcpy (debugfile, dir);
1128 strcat (debugfile, DEBUG_SUBDIRECTORY);
1129 strcat (debugfile, "/");
1130 strcat (debugfile, basename);
1132 if (separate_debug_file_exists (debugfile, crc32))
1136 return xstrdup (debugfile);
1139 /* Then try in the global debugfile directory. */
1140 strcpy (debugfile, debug_file_directory);
1141 strcat (debugfile, "/");
1142 strcat (debugfile, dir);
1143 strcat (debugfile, basename);
1145 if (separate_debug_file_exists (debugfile, crc32))
1149 return xstrdup (debugfile);
1158 /* This is the symbol-file command. Read the file, analyze its
1159 symbols, and add a struct symtab to a symtab list. The syntax of
1160 the command is rather bizarre--(1) buildargv implements various
1161 quoting conventions which are undocumented and have little or
1162 nothing in common with the way things are quoted (or not quoted)
1163 elsewhere in GDB, (2) options are used, which are not generally
1164 used in GDB (perhaps "set mapped on", "set readnow on" would be
1165 better), (3) the order of options matters, which is contrary to GNU
1166 conventions (because it is confusing and inconvenient). */
1167 /* Note: ezannoni 2000-04-17. This function used to have support for
1168 rombug (see remote-os9k.c). It consisted of a call to target_link()
1169 (target.c) to get the address of the text segment from the target,
1170 and pass that to symbol_file_add(). This is no longer supported. */
1173 symbol_file_command (char *args, int from_tty)
1177 struct cleanup *cleanups;
1178 int flags = OBJF_USERLOADED;
1184 symbol_file_clear (from_tty);
1188 if ((argv = buildargv (args)) == NULL)
1192 cleanups = make_cleanup_freeargv (argv);
1193 while (*argv != NULL)
1195 if (strcmp (*argv, "-readnow") == 0)
1196 flags |= OBJF_READNOW;
1197 else if (**argv == '-')
1198 error (_("unknown option `%s'"), *argv);
1203 symbol_file_add_main_1 (name, from_tty, flags);
1210 error (_("no symbol file name was specified"));
1212 do_cleanups (cleanups);
1216 /* Set the initial language.
1218 A better solution would be to record the language in the psymtab when reading
1219 partial symbols, and then use it (if known) to set the language. This would
1220 be a win for formats that encode the language in an easily discoverable place,
1221 such as DWARF. For stabs, we can jump through hoops looking for specially
1222 named symbols or try to intuit the language from the specific type of stabs
1223 we find, but we can't do that until later when we read in full symbols.
1227 set_initial_language (void)
1229 struct partial_symtab *pst;
1230 enum language lang = language_unknown;
1232 pst = find_main_psymtab ();
1235 if (pst->filename != NULL)
1237 lang = deduce_language_from_filename (pst->filename);
1239 if (lang == language_unknown)
1241 /* Make C the default language */
1244 set_language (lang);
1245 expected_language = current_language; /* Don't warn the user */
1249 /* Open file specified by NAME and hand it off to BFD for preliminary
1250 analysis. Result is a newly initialized bfd *, which includes a newly
1251 malloc'd` copy of NAME (tilde-expanded and made absolute).
1252 In case of trouble, error() is called. */
1255 symfile_bfd_open (char *name)
1259 char *absolute_name;
1263 name = tilde_expand (name); /* Returns 1st new malloc'd copy */
1265 /* Look down path for it, allocate 2nd new malloc'd copy. */
1266 desc = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, name, O_RDONLY | O_BINARY,
1268 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1271 char *exename = alloca (strlen (name) + 5);
1272 strcat (strcpy (exename, name), ".exe");
1273 desc = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, exename,
1274 O_RDONLY | O_BINARY, 0, &absolute_name);
1279 make_cleanup (xfree, name);
1280 perror_with_name (name);
1282 xfree (name); /* Free 1st new malloc'd copy */
1283 name = absolute_name; /* Keep 2nd malloc'd copy in bfd */
1284 /* It'll be freed in free_objfile(). */
1286 sym_bfd = bfd_fdopenr (name, gnutarget, desc);
1290 make_cleanup (xfree, name);
1291 error (_("\"%s\": can't open to read symbols: %s."), name,
1292 bfd_errmsg (bfd_get_error ()));
1294 bfd_set_cacheable (sym_bfd, 1);
1296 if (!bfd_check_format (sym_bfd, bfd_object))
1298 /* FIXME: should be checking for errors from bfd_close (for one thing,
1299 on error it does not free all the storage associated with the
1301 bfd_close (sym_bfd); /* This also closes desc */
1302 make_cleanup (xfree, name);
1303 error (_("\"%s\": can't read symbols: %s."), name,
1304 bfd_errmsg (bfd_get_error ()));
1309 /* Return the section index for the given section name. Return -1 if
1310 the section was not found. */
1312 get_section_index (struct objfile *objfile, char *section_name)
1314 asection *sect = bfd_get_section_by_name (objfile->obfd, section_name);
1321 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1322 startup by the _initialize routine in each object file format reader,
1323 to register information about each format the the reader is prepared
1327 add_symtab_fns (struct sym_fns *sf)
1329 sf->next = symtab_fns;
1334 /* Initialize to read symbols from the symbol file sym_bfd. It either
1335 returns or calls error(). The result is an initialized struct sym_fns
1336 in the objfile structure, that contains cached information about the
1340 find_sym_fns (struct objfile *objfile)
1343 enum bfd_flavour our_flavour = bfd_get_flavour (objfile->obfd);
1344 char *our_target = bfd_get_target (objfile->obfd);
1346 if (our_flavour == bfd_target_srec_flavour
1347 || our_flavour == bfd_target_ihex_flavour
1348 || our_flavour == bfd_target_tekhex_flavour)
1349 return; /* No symbols. */
1351 for (sf = symtab_fns; sf != NULL; sf = sf->next)
1353 if (our_flavour == sf->sym_flavour)
1359 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1360 bfd_get_target (objfile->obfd));
1363 /* This function runs the load command of our current target. */
1366 load_command (char *arg, int from_tty)
1369 arg = get_exec_file (1);
1370 target_load (arg, from_tty);
1372 /* After re-loading the executable, we don't really know which
1373 overlays are mapped any more. */
1374 overlay_cache_invalid = 1;
1377 /* This version of "load" should be usable for any target. Currently
1378 it is just used for remote targets, not inftarg.c or core files,
1379 on the theory that only in that case is it useful.
1381 Avoiding xmodem and the like seems like a win (a) because we don't have
1382 to worry about finding it, and (b) On VMS, fork() is very slow and so
1383 we don't want to run a subprocess. On the other hand, I'm not sure how
1384 performance compares. */
1386 static int download_write_size = 512;
1388 show_download_write_size (struct ui_file *file, int from_tty,
1389 struct cmd_list_element *c, const char *value)
1391 fprintf_filtered (file, _("\
1392 The write size used when downloading a program is %s.\n"),
1395 static int validate_download = 0;
1397 /* Callback service function for generic_load (bfd_map_over_sections). */
1400 add_section_size_callback (bfd *abfd, asection *asec, void *data)
1402 bfd_size_type *sum = data;
1404 *sum += bfd_get_section_size (asec);
1407 /* Opaque data for load_section_callback. */
1408 struct load_section_data {
1409 unsigned long load_offset;
1410 unsigned long write_count;
1411 unsigned long data_count;
1412 bfd_size_type total_size;
1415 /* Callback service function for generic_load (bfd_map_over_sections). */
1418 load_section_callback (bfd *abfd, asection *asec, void *data)
1420 struct load_section_data *args = data;
1422 if (bfd_get_section_flags (abfd, asec) & SEC_LOAD)
1424 bfd_size_type size = bfd_get_section_size (asec);
1428 struct cleanup *old_chain;
1429 CORE_ADDR lma = bfd_section_lma (abfd, asec) + args->load_offset;
1430 bfd_size_type block_size;
1432 const char *sect_name = bfd_get_section_name (abfd, asec);
1435 if (download_write_size > 0 && size > download_write_size)
1436 block_size = download_write_size;
1440 buffer = xmalloc (size);
1441 old_chain = make_cleanup (xfree, buffer);
1443 /* Is this really necessary? I guess it gives the user something
1444 to look at during a long download. */
1445 ui_out_message (uiout, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1446 sect_name, paddr_nz (size), paddr_nz (lma));
1448 bfd_get_section_contents (abfd, asec, buffer, 0, size);
1454 bfd_size_type this_transfer = size - sent;
1456 if (this_transfer >= block_size)
1457 this_transfer = block_size;
1458 len = target_write_memory_partial (lma, buffer,
1459 this_transfer, &err);
1462 if (validate_download)
1464 /* Broken memories and broken monitors manifest
1465 themselves here when bring new computers to
1466 life. This doubles already slow downloads. */
1467 /* NOTE: cagney/1999-10-18: A more efficient
1468 implementation might add a verify_memory()
1469 method to the target vector and then use
1470 that. remote.c could implement that method
1471 using the ``qCRC'' packet. */
1472 char *check = xmalloc (len);
1473 struct cleanup *verify_cleanups =
1474 make_cleanup (xfree, check);
1476 if (target_read_memory (lma, check, len) != 0)
1477 error (_("Download verify read failed at 0x%s"),
1479 if (memcmp (buffer, check, len) != 0)
1480 error (_("Download verify compare failed at 0x%s"),
1482 do_cleanups (verify_cleanups);
1484 args->data_count += len;
1487 args->write_count += 1;
1490 || (deprecated_ui_load_progress_hook != NULL
1491 && deprecated_ui_load_progress_hook (sect_name, sent)))
1492 error (_("Canceled the download"));
1494 if (deprecated_show_load_progress != NULL)
1495 deprecated_show_load_progress (sect_name, sent, size,
1499 while (sent < size);
1502 error (_("Memory access error while loading section %s."), sect_name);
1504 do_cleanups (old_chain);
1510 generic_load (char *args, int from_tty)
1514 time_t start_time, end_time; /* Start and end times of download */
1516 struct cleanup *old_cleanups;
1518 struct load_section_data cbdata;
1521 cbdata.load_offset = 0; /* Offset to add to vma for each section. */
1522 cbdata.write_count = 0; /* Number of writes needed. */
1523 cbdata.data_count = 0; /* Number of bytes written to target memory. */
1524 cbdata.total_size = 0; /* Total size of all bfd sectors. */
1526 /* Parse the input argument - the user can specify a load offset as
1527 a second argument. */
1528 filename = xmalloc (strlen (args) + 1);
1529 old_cleanups = make_cleanup (xfree, filename);
1530 strcpy (filename, args);
1531 offptr = strchr (filename, ' ');
1536 cbdata.load_offset = strtoul (offptr, &endptr, 0);
1537 if (offptr == endptr)
1538 error (_("Invalid download offset:%s."), offptr);
1542 cbdata.load_offset = 0;
1544 /* Open the file for loading. */
1545 loadfile_bfd = bfd_openr (filename, gnutarget);
1546 if (loadfile_bfd == NULL)
1548 perror_with_name (filename);
1552 /* FIXME: should be checking for errors from bfd_close (for one thing,
1553 on error it does not free all the storage associated with the
1555 make_cleanup_bfd_close (loadfile_bfd);
1557 if (!bfd_check_format (loadfile_bfd, bfd_object))
1559 error (_("\"%s\" is not an object file: %s"), filename,
1560 bfd_errmsg (bfd_get_error ()));
1563 bfd_map_over_sections (loadfile_bfd, add_section_size_callback,
1564 (void *) &cbdata.total_size);
1566 start_time = time (NULL);
1568 bfd_map_over_sections (loadfile_bfd, load_section_callback, &cbdata);
1570 end_time = time (NULL);
1572 entry = bfd_get_start_address (loadfile_bfd);
1573 ui_out_text (uiout, "Start address ");
1574 ui_out_field_fmt (uiout, "address", "0x%s", paddr_nz (entry));
1575 ui_out_text (uiout, ", load size ");
1576 ui_out_field_fmt (uiout, "load-size", "%lu", cbdata.data_count);
1577 ui_out_text (uiout, "\n");
1578 /* We were doing this in remote-mips.c, I suspect it is right
1579 for other targets too. */
1582 /* FIXME: are we supposed to call symbol_file_add or not? According
1583 to a comment from remote-mips.c (where a call to symbol_file_add
1584 was commented out), making the call confuses GDB if more than one
1585 file is loaded in. Some targets do (e.g., remote-vx.c) but
1586 others don't (or didn't - perhaps they have all been deleted). */
1588 print_transfer_performance (gdb_stdout, cbdata.data_count,
1589 cbdata.write_count, end_time - start_time);
1591 do_cleanups (old_cleanups);
1594 /* Report how fast the transfer went. */
1596 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1597 replaced by print_transfer_performance (with a very different
1598 function signature). */
1601 report_transfer_performance (unsigned long data_count, time_t start_time,
1604 print_transfer_performance (gdb_stdout, data_count,
1605 end_time - start_time, 0);
1609 print_transfer_performance (struct ui_file *stream,
1610 unsigned long data_count,
1611 unsigned long write_count,
1612 unsigned long time_count)
1614 ui_out_text (uiout, "Transfer rate: ");
1617 ui_out_field_fmt (uiout, "transfer-rate", "%lu",
1618 (data_count * 8) / time_count);
1619 ui_out_text (uiout, " bits/sec");
1623 ui_out_field_fmt (uiout, "transferred-bits", "%lu", (data_count * 8));
1624 ui_out_text (uiout, " bits in <1 sec");
1626 if (write_count > 0)
1628 ui_out_text (uiout, ", ");
1629 ui_out_field_fmt (uiout, "write-rate", "%lu", data_count / write_count);
1630 ui_out_text (uiout, " bytes/write");
1632 ui_out_text (uiout, ".\n");
1635 /* This function allows the addition of incrementally linked object files.
1636 It does not modify any state in the target, only in the debugger. */
1637 /* Note: ezannoni 2000-04-13 This function/command used to have a
1638 special case syntax for the rombug target (Rombug is the boot
1639 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
1640 rombug case, the user doesn't need to supply a text address,
1641 instead a call to target_link() (in target.c) would supply the
1642 value to use. We are now discontinuing this type of ad hoc syntax. */
1645 add_symbol_file_command (char *args, int from_tty)
1647 char *filename = NULL;
1648 int flags = OBJF_USERLOADED;
1650 int expecting_option = 0;
1651 int section_index = 0;
1655 int expecting_sec_name = 0;
1656 int expecting_sec_addr = 0;
1664 struct section_addr_info *section_addrs;
1665 struct sect_opt *sect_opts = NULL;
1666 size_t num_sect_opts = 0;
1667 struct cleanup *my_cleanups = make_cleanup (null_cleanup, NULL);
1670 sect_opts = (struct sect_opt *) xmalloc (num_sect_opts
1671 * sizeof (struct sect_opt));
1676 error (_("add-symbol-file takes a file name and an address"));
1678 /* Make a copy of the string that we can safely write into. */
1679 args = xstrdup (args);
1681 while (*args != '\000')
1683 /* Any leading spaces? */
1684 while (isspace (*args))
1687 /* Point arg to the beginning of the argument. */
1690 /* Move args pointer over the argument. */
1691 while ((*args != '\000') && !isspace (*args))
1694 /* If there are more arguments, terminate arg and
1696 if (*args != '\000')
1699 /* Now process the argument. */
1702 /* The first argument is the file name. */
1703 filename = tilde_expand (arg);
1704 make_cleanup (xfree, filename);
1709 /* The second argument is always the text address at which
1710 to load the program. */
1711 sect_opts[section_index].name = ".text";
1712 sect_opts[section_index].value = arg;
1713 if (++section_index > num_sect_opts)
1716 sect_opts = ((struct sect_opt *)
1717 xrealloc (sect_opts,
1719 * sizeof (struct sect_opt)));
1724 /* It's an option (starting with '-') or it's an argument
1729 if (strcmp (arg, "-readnow") == 0)
1730 flags |= OBJF_READNOW;
1731 else if (strcmp (arg, "-s") == 0)
1733 expecting_sec_name = 1;
1734 expecting_sec_addr = 1;
1739 if (expecting_sec_name)
1741 sect_opts[section_index].name = arg;
1742 expecting_sec_name = 0;
1745 if (expecting_sec_addr)
1747 sect_opts[section_index].value = arg;
1748 expecting_sec_addr = 0;
1749 if (++section_index > num_sect_opts)
1752 sect_opts = ((struct sect_opt *)
1753 xrealloc (sect_opts,
1755 * sizeof (struct sect_opt)));
1759 error (_("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*"));
1765 /* Print the prompt for the query below. And save the arguments into
1766 a sect_addr_info structure to be passed around to other
1767 functions. We have to split this up into separate print
1768 statements because hex_string returns a local static
1771 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename);
1772 section_addrs = alloc_section_addr_info (section_index);
1773 make_cleanup (xfree, section_addrs);
1774 for (i = 0; i < section_index; i++)
1777 char *val = sect_opts[i].value;
1778 char *sec = sect_opts[i].name;
1780 addr = parse_and_eval_address (val);
1782 /* Here we store the section offsets in the order they were
1783 entered on the command line. */
1784 section_addrs->other[sec_num].name = sec;
1785 section_addrs->other[sec_num].addr = addr;
1786 printf_unfiltered ("\t%s_addr = %s\n",
1787 sec, hex_string ((unsigned long)addr));
1790 /* The object's sections are initialized when a
1791 call is made to build_objfile_section_table (objfile).
1792 This happens in reread_symbols.
1793 At this point, we don't know what file type this is,
1794 so we can't determine what section names are valid. */
1797 if (from_tty && (!query ("%s", "")))
1798 error (_("Not confirmed."));
1800 symbol_file_add (filename, from_tty, section_addrs, 0, flags);
1802 /* Getting new symbols may change our opinion about what is
1804 reinit_frame_cache ();
1805 do_cleanups (my_cleanups);
1809 add_shared_symbol_files_command (char *args, int from_tty)
1811 #ifdef ADD_SHARED_SYMBOL_FILES
1812 ADD_SHARED_SYMBOL_FILES (args, from_tty);
1814 error (_("This command is not available in this configuration of GDB."));
1818 /* Re-read symbols if a symbol-file has changed. */
1820 reread_symbols (void)
1822 struct objfile *objfile;
1825 struct stat new_statbuf;
1828 /* With the addition of shared libraries, this should be modified,
1829 the load time should be saved in the partial symbol tables, since
1830 different tables may come from different source files. FIXME.
1831 This routine should then walk down each partial symbol table
1832 and see if the symbol table that it originates from has been changed */
1834 for (objfile = object_files; objfile; objfile = objfile->next)
1838 #ifdef DEPRECATED_IBM6000_TARGET
1839 /* If this object is from a shared library, then you should
1840 stat on the library name, not member name. */
1842 if (objfile->obfd->my_archive)
1843 res = stat (objfile->obfd->my_archive->filename, &new_statbuf);
1846 res = stat (objfile->name, &new_statbuf);
1849 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1850 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
1854 new_modtime = new_statbuf.st_mtime;
1855 if (new_modtime != objfile->mtime)
1857 struct cleanup *old_cleanups;
1858 struct section_offsets *offsets;
1860 char *obfd_filename;
1862 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
1865 /* There are various functions like symbol_file_add,
1866 symfile_bfd_open, syms_from_objfile, etc., which might
1867 appear to do what we want. But they have various other
1868 effects which we *don't* want. So we just do stuff
1869 ourselves. We don't worry about mapped files (for one thing,
1870 any mapped file will be out of date). */
1872 /* If we get an error, blow away this objfile (not sure if
1873 that is the correct response for things like shared
1875 old_cleanups = make_cleanup_free_objfile (objfile);
1876 /* We need to do this whenever any symbols go away. */
1877 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
1879 /* Clean up any state BFD has sitting around. We don't need
1880 to close the descriptor but BFD lacks a way of closing the
1881 BFD without closing the descriptor. */
1882 obfd_filename = bfd_get_filename (objfile->obfd);
1883 if (!bfd_close (objfile->obfd))
1884 error (_("Can't close BFD for %s: %s"), objfile->name,
1885 bfd_errmsg (bfd_get_error ()));
1886 objfile->obfd = bfd_openr (obfd_filename, gnutarget);
1887 if (objfile->obfd == NULL)
1888 error (_("Can't open %s to read symbols."), objfile->name);
1889 /* bfd_openr sets cacheable to true, which is what we want. */
1890 if (!bfd_check_format (objfile->obfd, bfd_object))
1891 error (_("Can't read symbols from %s: %s."), objfile->name,
1892 bfd_errmsg (bfd_get_error ()));
1894 /* Save the offsets, we will nuke them with the rest of the
1896 num_offsets = objfile->num_sections;
1897 offsets = ((struct section_offsets *)
1898 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets)));
1899 memcpy (offsets, objfile->section_offsets,
1900 SIZEOF_N_SECTION_OFFSETS (num_offsets));
1902 /* Nuke all the state that we will re-read. Much of the following
1903 code which sets things to NULL really is necessary to tell
1904 other parts of GDB that there is nothing currently there. */
1906 /* FIXME: Do we have to free a whole linked list, or is this
1908 if (objfile->global_psymbols.list)
1909 xfree (objfile->global_psymbols.list);
1910 memset (&objfile->global_psymbols, 0,
1911 sizeof (objfile->global_psymbols));
1912 if (objfile->static_psymbols.list)
1913 xfree (objfile->static_psymbols.list);
1914 memset (&objfile->static_psymbols, 0,
1915 sizeof (objfile->static_psymbols));
1917 /* Free the obstacks for non-reusable objfiles */
1918 bcache_xfree (objfile->psymbol_cache);
1919 objfile->psymbol_cache = bcache_xmalloc ();
1920 bcache_xfree (objfile->macro_cache);
1921 objfile->macro_cache = bcache_xmalloc ();
1922 if (objfile->demangled_names_hash != NULL)
1924 htab_delete (objfile->demangled_names_hash);
1925 objfile->demangled_names_hash = NULL;
1927 obstack_free (&objfile->objfile_obstack, 0);
1928 objfile->sections = NULL;
1929 objfile->symtabs = NULL;
1930 objfile->psymtabs = NULL;
1931 objfile->free_psymtabs = NULL;
1932 objfile->cp_namespace_symtab = NULL;
1933 objfile->msymbols = NULL;
1934 objfile->deprecated_sym_private = NULL;
1935 objfile->minimal_symbol_count = 0;
1936 memset (&objfile->msymbol_hash, 0,
1937 sizeof (objfile->msymbol_hash));
1938 memset (&objfile->msymbol_demangled_hash, 0,
1939 sizeof (objfile->msymbol_demangled_hash));
1940 objfile->fundamental_types = NULL;
1941 clear_objfile_data (objfile);
1942 if (objfile->sf != NULL)
1944 (*objfile->sf->sym_finish) (objfile);
1947 /* We never make this a mapped file. */
1949 objfile->psymbol_cache = bcache_xmalloc ();
1950 objfile->macro_cache = bcache_xmalloc ();
1951 /* obstack_init also initializes the obstack so it is
1952 empty. We could use obstack_specify_allocation but
1953 gdb_obstack.h specifies the alloc/dealloc
1955 obstack_init (&objfile->objfile_obstack);
1956 if (build_objfile_section_table (objfile))
1958 error (_("Can't find the file sections in `%s': %s"),
1959 objfile->name, bfd_errmsg (bfd_get_error ()));
1961 terminate_minimal_symbol_table (objfile);
1963 /* We use the same section offsets as from last time. I'm not
1964 sure whether that is always correct for shared libraries. */
1965 objfile->section_offsets = (struct section_offsets *)
1966 obstack_alloc (&objfile->objfile_obstack,
1967 SIZEOF_N_SECTION_OFFSETS (num_offsets));
1968 memcpy (objfile->section_offsets, offsets,
1969 SIZEOF_N_SECTION_OFFSETS (num_offsets));
1970 objfile->num_sections = num_offsets;
1972 /* What the hell is sym_new_init for, anyway? The concept of
1973 distinguishing between the main file and additional files
1974 in this way seems rather dubious. */
1975 if (objfile == symfile_objfile)
1977 (*objfile->sf->sym_new_init) (objfile);
1980 (*objfile->sf->sym_init) (objfile);
1981 clear_complaints (&symfile_complaints, 1, 1);
1982 /* The "mainline" parameter is a hideous hack; I think leaving it
1983 zero is OK since dbxread.c also does what it needs to do if
1984 objfile->global_psymbols.size is 0. */
1985 (*objfile->sf->sym_read) (objfile, 0);
1986 if (!have_partial_symbols () && !have_full_symbols ())
1989 printf_unfiltered (_("(no debugging symbols found)\n"));
1992 objfile->flags |= OBJF_SYMS;
1994 /* We're done reading the symbol file; finish off complaints. */
1995 clear_complaints (&symfile_complaints, 0, 1);
1997 /* Getting new symbols may change our opinion about what is
2000 reinit_frame_cache ();
2002 /* Discard cleanups as symbol reading was successful. */
2003 discard_cleanups (old_cleanups);
2005 /* If the mtime has changed between the time we set new_modtime
2006 and now, we *want* this to be out of date, so don't call stat
2008 objfile->mtime = new_modtime;
2010 reread_separate_symbols (objfile);
2016 clear_symtab_users ();
2020 /* Handle separate debug info for OBJFILE, which has just been
2022 - If we had separate debug info before, but now we don't, get rid
2023 of the separated objfile.
2024 - If we didn't have separated debug info before, but now we do,
2025 read in the new separated debug info file.
2026 - If the debug link points to a different file, toss the old one
2027 and read the new one.
2028 This function does *not* handle the case where objfile is still
2029 using the same separate debug info file, but that file's timestamp
2030 has changed. That case should be handled by the loop in
2031 reread_symbols already. */
2033 reread_separate_symbols (struct objfile *objfile)
2036 unsigned long crc32;
2038 /* Does the updated objfile's debug info live in a
2040 debug_file = find_separate_debug_file (objfile);
2042 if (objfile->separate_debug_objfile)
2044 /* There are two cases where we need to get rid of
2045 the old separated debug info objfile:
2046 - if the new primary objfile doesn't have
2047 separated debug info, or
2048 - if the new primary objfile has separate debug
2049 info, but it's under a different filename.
2051 If the old and new objfiles both have separate
2052 debug info, under the same filename, then we're
2053 okay --- if the separated file's contents have
2054 changed, we will have caught that when we
2055 visited it in this function's outermost
2058 || strcmp (debug_file, objfile->separate_debug_objfile->name) != 0)
2059 free_objfile (objfile->separate_debug_objfile);
2062 /* If the new objfile has separate debug info, and we
2063 haven't loaded it already, do so now. */
2065 && ! objfile->separate_debug_objfile)
2067 /* Use the same section offset table as objfile itself.
2068 Preserve the flags from objfile that make sense. */
2069 objfile->separate_debug_objfile
2070 = (symbol_file_add_with_addrs_or_offsets
2071 (symfile_bfd_open (debug_file),
2072 info_verbose, /* from_tty: Don't override the default. */
2073 0, /* No addr table. */
2074 objfile->section_offsets, objfile->num_sections,
2075 0, /* Not mainline. See comments about this above. */
2076 objfile->flags & (OBJF_REORDERED | OBJF_SHARED | OBJF_READNOW
2077 | OBJF_USERLOADED)));
2078 objfile->separate_debug_objfile->separate_debug_objfile_backlink
2094 static filename_language *filename_language_table;
2095 static int fl_table_size, fl_table_next;
2098 add_filename_language (char *ext, enum language lang)
2100 if (fl_table_next >= fl_table_size)
2102 fl_table_size += 10;
2103 filename_language_table =
2104 xrealloc (filename_language_table,
2105 fl_table_size * sizeof (*filename_language_table));
2108 filename_language_table[fl_table_next].ext = xstrdup (ext);
2109 filename_language_table[fl_table_next].lang = lang;
2113 static char *ext_args;
2115 show_ext_args (struct ui_file *file, int from_tty,
2116 struct cmd_list_element *c, const char *value)
2118 fprintf_filtered (file, _("\
2119 Mapping between filename extension and source language is \"%s\".\n"),
2124 set_ext_lang_command (char *args, int from_tty, struct cmd_list_element *e)
2127 char *cp = ext_args;
2130 /* First arg is filename extension, starting with '.' */
2132 error (_("'%s': Filename extension must begin with '.'"), ext_args);
2134 /* Find end of first arg. */
2135 while (*cp && !isspace (*cp))
2139 error (_("'%s': two arguments required -- filename extension and language"),
2142 /* Null-terminate first arg */
2145 /* Find beginning of second arg, which should be a source language. */
2146 while (*cp && isspace (*cp))
2150 error (_("'%s': two arguments required -- filename extension and language"),
2153 /* Lookup the language from among those we know. */
2154 lang = language_enum (cp);
2156 /* Now lookup the filename extension: do we already know it? */
2157 for (i = 0; i < fl_table_next; i++)
2158 if (0 == strcmp (ext_args, filename_language_table[i].ext))
2161 if (i >= fl_table_next)
2163 /* new file extension */
2164 add_filename_language (ext_args, lang);
2168 /* redefining a previously known filename extension */
2171 /* query ("Really make files of type %s '%s'?", */
2172 /* ext_args, language_str (lang)); */
2174 xfree (filename_language_table[i].ext);
2175 filename_language_table[i].ext = xstrdup (ext_args);
2176 filename_language_table[i].lang = lang;
2181 info_ext_lang_command (char *args, int from_tty)
2185 printf_filtered (_("Filename extensions and the languages they represent:"));
2186 printf_filtered ("\n\n");
2187 for (i = 0; i < fl_table_next; i++)
2188 printf_filtered ("\t%s\t- %s\n",
2189 filename_language_table[i].ext,
2190 language_str (filename_language_table[i].lang));
2194 init_filename_language_table (void)
2196 if (fl_table_size == 0) /* protect against repetition */
2200 filename_language_table =
2201 xmalloc (fl_table_size * sizeof (*filename_language_table));
2202 add_filename_language (".c", language_c);
2203 add_filename_language (".C", language_cplus);
2204 add_filename_language (".cc", language_cplus);
2205 add_filename_language (".cp", language_cplus);
2206 add_filename_language (".cpp", language_cplus);
2207 add_filename_language (".cxx", language_cplus);
2208 add_filename_language (".c++", language_cplus);
2209 add_filename_language (".java", language_java);
2210 add_filename_language (".class", language_java);
2211 add_filename_language (".m", language_objc);
2212 add_filename_language (".f", language_fortran);
2213 add_filename_language (".F", language_fortran);
2214 add_filename_language (".s", language_asm);
2215 add_filename_language (".S", language_asm);
2216 add_filename_language (".pas", language_pascal);
2217 add_filename_language (".p", language_pascal);
2218 add_filename_language (".pp", language_pascal);
2219 add_filename_language (".adb", language_ada);
2220 add_filename_language (".ads", language_ada);
2221 add_filename_language (".a", language_ada);
2222 add_filename_language (".ada", language_ada);
2227 deduce_language_from_filename (char *filename)
2232 if (filename != NULL)
2233 if ((cp = strrchr (filename, '.')) != NULL)
2234 for (i = 0; i < fl_table_next; i++)
2235 if (strcmp (cp, filename_language_table[i].ext) == 0)
2236 return filename_language_table[i].lang;
2238 return language_unknown;
2243 Allocate and partly initialize a new symbol table. Return a pointer
2244 to it. error() if no space.
2246 Caller must set these fields:
2252 possibly free_named_symtabs (symtab->filename);
2256 allocate_symtab (char *filename, struct objfile *objfile)
2258 struct symtab *symtab;
2260 symtab = (struct symtab *)
2261 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symtab));
2262 memset (symtab, 0, sizeof (*symtab));
2263 symtab->filename = obsavestring (filename, strlen (filename),
2264 &objfile->objfile_obstack);
2265 symtab->fullname = NULL;
2266 symtab->language = deduce_language_from_filename (filename);
2267 symtab->debugformat = obsavestring ("unknown", 7,
2268 &objfile->objfile_obstack);
2270 /* Hook it to the objfile it comes from */
2272 symtab->objfile = objfile;
2273 symtab->next = objfile->symtabs;
2274 objfile->symtabs = symtab;
2276 /* FIXME: This should go away. It is only defined for the Z8000,
2277 and the Z8000 definition of this macro doesn't have anything to
2278 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
2279 here for convenience. */
2280 #ifdef INIT_EXTRA_SYMTAB_INFO
2281 INIT_EXTRA_SYMTAB_INFO (symtab);
2287 struct partial_symtab *
2288 allocate_psymtab (char *filename, struct objfile *objfile)
2290 struct partial_symtab *psymtab;
2292 if (objfile->free_psymtabs)
2294 psymtab = objfile->free_psymtabs;
2295 objfile->free_psymtabs = psymtab->next;
2298 psymtab = (struct partial_symtab *)
2299 obstack_alloc (&objfile->objfile_obstack,
2300 sizeof (struct partial_symtab));
2302 memset (psymtab, 0, sizeof (struct partial_symtab));
2303 psymtab->filename = obsavestring (filename, strlen (filename),
2304 &objfile->objfile_obstack);
2305 psymtab->symtab = NULL;
2307 /* Prepend it to the psymtab list for the objfile it belongs to.
2308 Psymtabs are searched in most recent inserted -> least recent
2311 psymtab->objfile = objfile;
2312 psymtab->next = objfile->psymtabs;
2313 objfile->psymtabs = psymtab;
2316 struct partial_symtab **prev_pst;
2317 psymtab->objfile = objfile;
2318 psymtab->next = NULL;
2319 prev_pst = &(objfile->psymtabs);
2320 while ((*prev_pst) != NULL)
2321 prev_pst = &((*prev_pst)->next);
2322 (*prev_pst) = psymtab;
2330 discard_psymtab (struct partial_symtab *pst)
2332 struct partial_symtab **prev_pst;
2335 Empty psymtabs happen as a result of header files which don't
2336 have any symbols in them. There can be a lot of them. But this
2337 check is wrong, in that a psymtab with N_SLINE entries but
2338 nothing else is not empty, but we don't realize that. Fixing
2339 that without slowing things down might be tricky. */
2341 /* First, snip it out of the psymtab chain */
2343 prev_pst = &(pst->objfile->psymtabs);
2344 while ((*prev_pst) != pst)
2345 prev_pst = &((*prev_pst)->next);
2346 (*prev_pst) = pst->next;
2348 /* Next, put it on a free list for recycling */
2350 pst->next = pst->objfile->free_psymtabs;
2351 pst->objfile->free_psymtabs = pst;
2355 /* Reset all data structures in gdb which may contain references to symbol
2359 clear_symtab_users (void)
2361 /* Someday, we should do better than this, by only blowing away
2362 the things that really need to be blown. */
2363 clear_value_history ();
2365 clear_internalvars ();
2366 breakpoint_re_set ();
2367 set_default_breakpoint (0, 0, 0, 0);
2368 clear_current_source_symtab_and_line ();
2369 clear_pc_function_cache ();
2370 if (deprecated_target_new_objfile_hook)
2371 deprecated_target_new_objfile_hook (NULL);
2375 clear_symtab_users_cleanup (void *ignore)
2377 clear_symtab_users ();
2380 /* clear_symtab_users_once:
2382 This function is run after symbol reading, or from a cleanup.
2383 If an old symbol table was obsoleted, the old symbol table
2384 has been blown away, but the other GDB data structures that may
2385 reference it have not yet been cleared or re-directed. (The old
2386 symtab was zapped, and the cleanup queued, in free_named_symtab()
2389 This function can be queued N times as a cleanup, or called
2390 directly; it will do all the work the first time, and then will be a
2391 no-op until the next time it is queued. This works by bumping a
2392 counter at queueing time. Much later when the cleanup is run, or at
2393 the end of symbol processing (in case the cleanup is discarded), if
2394 the queued count is greater than the "done-count", we do the work
2395 and set the done-count to the queued count. If the queued count is
2396 less than or equal to the done-count, we just ignore the call. This
2397 is needed because reading a single .o file will often replace many
2398 symtabs (one per .h file, for example), and we don't want to reset
2399 the breakpoints N times in the user's face.
2401 The reason we both queue a cleanup, and call it directly after symbol
2402 reading, is because the cleanup protects us in case of errors, but is
2403 discarded if symbol reading is successful. */
2406 /* FIXME: As free_named_symtabs is currently a big noop this function
2407 is no longer needed. */
2408 static void clear_symtab_users_once (void);
2410 static int clear_symtab_users_queued;
2411 static int clear_symtab_users_done;
2414 clear_symtab_users_once (void)
2416 /* Enforce once-per-`do_cleanups'-semantics */
2417 if (clear_symtab_users_queued <= clear_symtab_users_done)
2419 clear_symtab_users_done = clear_symtab_users_queued;
2421 clear_symtab_users ();
2425 /* Delete the specified psymtab, and any others that reference it. */
2428 cashier_psymtab (struct partial_symtab *pst)
2430 struct partial_symtab *ps, *pprev = NULL;
2433 /* Find its previous psymtab in the chain */
2434 for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
2443 /* Unhook it from the chain. */
2444 if (ps == pst->objfile->psymtabs)
2445 pst->objfile->psymtabs = ps->next;
2447 pprev->next = ps->next;
2449 /* FIXME, we can't conveniently deallocate the entries in the
2450 partial_symbol lists (global_psymbols/static_psymbols) that
2451 this psymtab points to. These just take up space until all
2452 the psymtabs are reclaimed. Ditto the dependencies list and
2453 filename, which are all in the objfile_obstack. */
2455 /* We need to cashier any psymtab that has this one as a dependency... */
2457 for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
2459 for (i = 0; i < ps->number_of_dependencies; i++)
2461 if (ps->dependencies[i] == pst)
2463 cashier_psymtab (ps);
2464 goto again; /* Must restart, chain has been munged. */
2471 /* If a symtab or psymtab for filename NAME is found, free it along
2472 with any dependent breakpoints, displays, etc.
2473 Used when loading new versions of object modules with the "add-file"
2474 command. This is only called on the top-level symtab or psymtab's name;
2475 it is not called for subsidiary files such as .h files.
2477 Return value is 1 if we blew away the environment, 0 if not.
2478 FIXME. The return value appears to never be used.
2480 FIXME. I think this is not the best way to do this. We should
2481 work on being gentler to the environment while still cleaning up
2482 all stray pointers into the freed symtab. */
2485 free_named_symtabs (char *name)
2488 /* FIXME: With the new method of each objfile having it's own
2489 psymtab list, this function needs serious rethinking. In particular,
2490 why was it ever necessary to toss psymtabs with specific compilation
2491 unit filenames, as opposed to all psymtabs from a particular symbol
2493 Well, the answer is that some systems permit reloading of particular
2494 compilation units. We want to blow away any old info about these
2495 compilation units, regardless of which objfiles they arrived in. --gnu. */
2498 struct symtab *prev;
2499 struct partial_symtab *ps;
2500 struct blockvector *bv;
2503 /* We only wack things if the symbol-reload switch is set. */
2504 if (!symbol_reloading)
2507 /* Some symbol formats have trouble providing file names... */
2508 if (name == 0 || *name == '\0')
2511 /* Look for a psymtab with the specified name. */
2514 for (ps = partial_symtab_list; ps; ps = ps->next)
2516 if (strcmp (name, ps->filename) == 0)
2518 cashier_psymtab (ps); /* Blow it away...and its little dog, too. */
2519 goto again2; /* Must restart, chain has been munged */
2523 /* Look for a symtab with the specified name. */
2525 for (s = symtab_list; s; s = s->next)
2527 if (strcmp (name, s->filename) == 0)
2534 if (s == symtab_list)
2535 symtab_list = s->next;
2537 prev->next = s->next;
2539 /* For now, queue a delete for all breakpoints, displays, etc., whether
2540 or not they depend on the symtab being freed. This should be
2541 changed so that only those data structures affected are deleted. */
2543 /* But don't delete anything if the symtab is empty.
2544 This test is necessary due to a bug in "dbxread.c" that
2545 causes empty symtabs to be created for N_SO symbols that
2546 contain the pathname of the object file. (This problem
2547 has been fixed in GDB 3.9x). */
2549 bv = BLOCKVECTOR (s);
2550 if (BLOCKVECTOR_NBLOCKS (bv) > 2
2551 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK))
2552 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)))
2554 complaint (&symfile_complaints, _("Replacing old symbols for `%s'"),
2556 clear_symtab_users_queued++;
2557 make_cleanup (clear_symtab_users_once, 0);
2561 complaint (&symfile_complaints, _("Empty symbol table found for `%s'"),
2568 /* It is still possible that some breakpoints will be affected
2569 even though no symtab was found, since the file might have
2570 been compiled without debugging, and hence not be associated
2571 with a symtab. In order to handle this correctly, we would need
2572 to keep a list of text address ranges for undebuggable files.
2573 For now, we do nothing, since this is a fairly obscure case. */
2577 /* FIXME, what about the minimal symbol table? */
2584 /* Allocate and partially fill a partial symtab. It will be
2585 completely filled at the end of the symbol list.
2587 FILENAME is the name of the symbol-file we are reading from. */
2589 struct partial_symtab *
2590 start_psymtab_common (struct objfile *objfile,
2591 struct section_offsets *section_offsets, char *filename,
2592 CORE_ADDR textlow, struct partial_symbol **global_syms,
2593 struct partial_symbol **static_syms)
2595 struct partial_symtab *psymtab;
2597 psymtab = allocate_psymtab (filename, objfile);
2598 psymtab->section_offsets = section_offsets;
2599 psymtab->textlow = textlow;
2600 psymtab->texthigh = psymtab->textlow; /* default */
2601 psymtab->globals_offset = global_syms - objfile->global_psymbols.list;
2602 psymtab->statics_offset = static_syms - objfile->static_psymbols.list;
2606 /* Add a symbol with a long value to a psymtab.
2607 Since one arg is a struct, we pass in a ptr and deref it (sigh).
2608 Return the partial symbol that has been added. */
2610 /* NOTE: carlton/2003-09-11: The reason why we return the partial
2611 symbol is so that callers can get access to the symbol's demangled
2612 name, which they don't have any cheap way to determine otherwise.
2613 (Currenly, dwarf2read.c is the only file who uses that information,
2614 though it's possible that other readers might in the future.)
2615 Elena wasn't thrilled about that, and I don't blame her, but we
2616 couldn't come up with a better way to get that information. If
2617 it's needed in other situations, we could consider breaking up
2618 SYMBOL_SET_NAMES to provide access to the demangled name lookup
2621 const struct partial_symbol *
2622 add_psymbol_to_list (char *name, int namelength, domain_enum domain,
2623 enum address_class class,
2624 struct psymbol_allocation_list *list, long val, /* Value as a long */
2625 CORE_ADDR coreaddr, /* Value as a CORE_ADDR */
2626 enum language language, struct objfile *objfile)
2628 struct partial_symbol *psym;
2629 char *buf = alloca (namelength + 1);
2630 /* psymbol is static so that there will be no uninitialized gaps in the
2631 structure which might contain random data, causing cache misses in
2633 static struct partial_symbol psymbol;
2635 /* Create local copy of the partial symbol */
2636 memcpy (buf, name, namelength);
2637 buf[namelength] = '\0';
2638 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2641 SYMBOL_VALUE (&psymbol) = val;
2645 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
2647 SYMBOL_SECTION (&psymbol) = 0;
2648 SYMBOL_LANGUAGE (&psymbol) = language;
2649 PSYMBOL_DOMAIN (&psymbol) = domain;
2650 PSYMBOL_CLASS (&psymbol) = class;
2652 SYMBOL_SET_NAMES (&psymbol, buf, namelength, objfile);
2654 /* Stash the partial symbol away in the cache */
2655 psym = deprecated_bcache (&psymbol, sizeof (struct partial_symbol),
2656 objfile->psymbol_cache);
2658 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2659 if (list->next >= list->list + list->size)
2661 extend_psymbol_list (list, objfile);
2663 *list->next++ = psym;
2664 OBJSTAT (objfile, n_psyms++);
2669 /* Add a symbol with a long value to a psymtab. This differs from
2670 * add_psymbol_to_list above in taking both a mangled and a demangled
2674 add_psymbol_with_dem_name_to_list (char *name, int namelength, char *dem_name,
2675 int dem_namelength, domain_enum domain,
2676 enum address_class class,
2677 struct psymbol_allocation_list *list, long val, /* Value as a long */
2678 CORE_ADDR coreaddr, /* Value as a CORE_ADDR */
2679 enum language language,
2680 struct objfile *objfile)
2682 struct partial_symbol *psym;
2683 char *buf = alloca (namelength + 1);
2684 /* psymbol is static so that there will be no uninitialized gaps in the
2685 structure which might contain random data, causing cache misses in
2687 static struct partial_symbol psymbol;
2689 /* Create local copy of the partial symbol */
2691 memcpy (buf, name, namelength);
2692 buf[namelength] = '\0';
2693 DEPRECATED_SYMBOL_NAME (&psymbol) = deprecated_bcache (buf, namelength + 1,
2694 objfile->psymbol_cache);
2696 buf = alloca (dem_namelength + 1);
2697 memcpy (buf, dem_name, dem_namelength);
2698 buf[dem_namelength] = '\0';
2703 case language_cplus:
2704 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol) =
2705 deprecated_bcache (buf, dem_namelength + 1, objfile->psymbol_cache);
2707 /* FIXME What should be done for the default case? Ignoring for now. */
2710 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2713 SYMBOL_VALUE (&psymbol) = val;
2717 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
2719 SYMBOL_SECTION (&psymbol) = 0;
2720 SYMBOL_LANGUAGE (&psymbol) = language;
2721 PSYMBOL_DOMAIN (&psymbol) = domain;
2722 PSYMBOL_CLASS (&psymbol) = class;
2723 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language);
2725 /* Stash the partial symbol away in the cache */
2726 psym = deprecated_bcache (&psymbol, sizeof (struct partial_symbol),
2727 objfile->psymbol_cache);
2729 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2730 if (list->next >= list->list + list->size)
2732 extend_psymbol_list (list, objfile);
2734 *list->next++ = psym;
2735 OBJSTAT (objfile, n_psyms++);
2738 /* Initialize storage for partial symbols. */
2741 init_psymbol_list (struct objfile *objfile, int total_symbols)
2743 /* Free any previously allocated psymbol lists. */
2745 if (objfile->global_psymbols.list)
2747 xfree (objfile->global_psymbols.list);
2749 if (objfile->static_psymbols.list)
2751 xfree (objfile->static_psymbols.list);
2754 /* Current best guess is that approximately a twentieth
2755 of the total symbols (in a debugging file) are global or static
2758 objfile->global_psymbols.size = total_symbols / 10;
2759 objfile->static_psymbols.size = total_symbols / 10;
2761 if (objfile->global_psymbols.size > 0)
2763 objfile->global_psymbols.next =
2764 objfile->global_psymbols.list = (struct partial_symbol **)
2765 xmalloc ((objfile->global_psymbols.size
2766 * sizeof (struct partial_symbol *)));
2768 if (objfile->static_psymbols.size > 0)
2770 objfile->static_psymbols.next =
2771 objfile->static_psymbols.list = (struct partial_symbol **)
2772 xmalloc ((objfile->static_psymbols.size
2773 * sizeof (struct partial_symbol *)));
2778 The following code implements an abstraction for debugging overlay sections.
2780 The target model is as follows:
2781 1) The gnu linker will permit multiple sections to be mapped into the
2782 same VMA, each with its own unique LMA (or load address).
2783 2) It is assumed that some runtime mechanism exists for mapping the
2784 sections, one by one, from the load address into the VMA address.
2785 3) This code provides a mechanism for gdb to keep track of which
2786 sections should be considered to be mapped from the VMA to the LMA.
2787 This information is used for symbol lookup, and memory read/write.
2788 For instance, if a section has been mapped then its contents
2789 should be read from the VMA, otherwise from the LMA.
2791 Two levels of debugger support for overlays are available. One is
2792 "manual", in which the debugger relies on the user to tell it which
2793 overlays are currently mapped. This level of support is
2794 implemented entirely in the core debugger, and the information about
2795 whether a section is mapped is kept in the objfile->obj_section table.
2797 The second level of support is "automatic", and is only available if
2798 the target-specific code provides functionality to read the target's
2799 overlay mapping table, and translate its contents for the debugger
2800 (by updating the mapped state information in the obj_section tables).
2802 The interface is as follows:
2804 overlay map <name> -- tell gdb to consider this section mapped
2805 overlay unmap <name> -- tell gdb to consider this section unmapped
2806 overlay list -- list the sections that GDB thinks are mapped
2807 overlay read-target -- get the target's state of what's mapped
2808 overlay off/manual/auto -- set overlay debugging state
2809 Functional interface:
2810 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2811 section, return that section.
2812 find_pc_overlay(pc): find any overlay section that contains
2813 the pc, either in its VMA or its LMA
2814 overlay_is_mapped(sect): true if overlay is marked as mapped
2815 section_is_overlay(sect): true if section's VMA != LMA
2816 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2817 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2818 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2819 overlay_mapped_address(...): map an address from section's LMA to VMA
2820 overlay_unmapped_address(...): map an address from section's VMA to LMA
2821 symbol_overlayed_address(...): Return a "current" address for symbol:
2822 either in VMA or LMA depending on whether
2823 the symbol's section is currently mapped
2826 /* Overlay debugging state: */
2828 enum overlay_debugging_state overlay_debugging = ovly_off;
2829 int overlay_cache_invalid = 0; /* True if need to refresh mapped state */
2831 /* Target vector for refreshing overlay mapped state */
2832 static void simple_overlay_update (struct obj_section *);
2833 void (*target_overlay_update) (struct obj_section *) = simple_overlay_update;
2835 /* Function: section_is_overlay (SECTION)
2836 Returns true if SECTION has VMA not equal to LMA, ie.
2837 SECTION is loaded at an address different from where it will "run". */
2840 section_is_overlay (asection *section)
2842 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2844 if (overlay_debugging)
2845 if (section && section->lma != 0 &&
2846 section->vma != section->lma)
2852 /* Function: overlay_invalidate_all (void)
2853 Invalidate the mapped state of all overlay sections (mark it as stale). */
2856 overlay_invalidate_all (void)
2858 struct objfile *objfile;
2859 struct obj_section *sect;
2861 ALL_OBJSECTIONS (objfile, sect)
2862 if (section_is_overlay (sect->the_bfd_section))
2863 sect->ovly_mapped = -1;
2866 /* Function: overlay_is_mapped (SECTION)
2867 Returns true if section is an overlay, and is currently mapped.
2868 Private: public access is thru function section_is_mapped.
2870 Access to the ovly_mapped flag is restricted to this function, so
2871 that we can do automatic update. If the global flag
2872 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2873 overlay_invalidate_all. If the mapped state of the particular
2874 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2877 overlay_is_mapped (struct obj_section *osect)
2879 if (osect == 0 || !section_is_overlay (osect->the_bfd_section))
2882 switch (overlay_debugging)
2886 return 0; /* overlay debugging off */
2887 case ovly_auto: /* overlay debugging automatic */
2888 /* Unles there is a target_overlay_update function,
2889 there's really nothing useful to do here (can't really go auto) */
2890 if (target_overlay_update)
2892 if (overlay_cache_invalid)
2894 overlay_invalidate_all ();
2895 overlay_cache_invalid = 0;
2897 if (osect->ovly_mapped == -1)
2898 (*target_overlay_update) (osect);
2900 /* fall thru to manual case */
2901 case ovly_on: /* overlay debugging manual */
2902 return osect->ovly_mapped == 1;
2906 /* Function: section_is_mapped
2907 Returns true if section is an overlay, and is currently mapped. */
2910 section_is_mapped (asection *section)
2912 struct objfile *objfile;
2913 struct obj_section *osect;
2915 if (overlay_debugging)
2916 if (section && section_is_overlay (section))
2917 ALL_OBJSECTIONS (objfile, osect)
2918 if (osect->the_bfd_section == section)
2919 return overlay_is_mapped (osect);
2924 /* Function: pc_in_unmapped_range
2925 If PC falls into the lma range of SECTION, return true, else false. */
2928 pc_in_unmapped_range (CORE_ADDR pc, asection *section)
2930 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2934 if (overlay_debugging)
2935 if (section && section_is_overlay (section))
2937 size = bfd_get_section_size (section);
2938 if (section->lma <= pc && pc < section->lma + size)
2944 /* Function: pc_in_mapped_range
2945 If PC falls into the vma range of SECTION, return true, else false. */
2948 pc_in_mapped_range (CORE_ADDR pc, asection *section)
2950 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2954 if (overlay_debugging)
2955 if (section && section_is_overlay (section))
2957 size = bfd_get_section_size (section);
2958 if (section->vma <= pc && pc < section->vma + size)
2965 /* Return true if the mapped ranges of sections A and B overlap, false
2968 sections_overlap (asection *a, asection *b)
2970 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2972 CORE_ADDR a_start = a->vma;
2973 CORE_ADDR a_end = a->vma + bfd_get_section_size (a);
2974 CORE_ADDR b_start = b->vma;
2975 CORE_ADDR b_end = b->vma + bfd_get_section_size (b);
2977 return (a_start < b_end && b_start < a_end);
2980 /* Function: overlay_unmapped_address (PC, SECTION)
2981 Returns the address corresponding to PC in the unmapped (load) range.
2982 May be the same as PC. */
2985 overlay_unmapped_address (CORE_ADDR pc, asection *section)
2987 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2989 if (overlay_debugging)
2990 if (section && section_is_overlay (section) &&
2991 pc_in_mapped_range (pc, section))
2992 return pc + section->lma - section->vma;
2997 /* Function: overlay_mapped_address (PC, SECTION)
2998 Returns the address corresponding to PC in the mapped (runtime) range.
2999 May be the same as PC. */
3002 overlay_mapped_address (CORE_ADDR pc, asection *section)
3004 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3006 if (overlay_debugging)
3007 if (section && section_is_overlay (section) &&
3008 pc_in_unmapped_range (pc, section))
3009 return pc + section->vma - section->lma;
3015 /* Function: symbol_overlayed_address
3016 Return one of two addresses (relative to the VMA or to the LMA),
3017 depending on whether the section is mapped or not. */
3020 symbol_overlayed_address (CORE_ADDR address, asection *section)
3022 if (overlay_debugging)
3024 /* If the symbol has no section, just return its regular address. */
3027 /* If the symbol's section is not an overlay, just return its address */
3028 if (!section_is_overlay (section))
3030 /* If the symbol's section is mapped, just return its address */
3031 if (section_is_mapped (section))
3034 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3035 * then return its LOADED address rather than its vma address!!
3037 return overlay_unmapped_address (address, section);
3042 /* Function: find_pc_overlay (PC)
3043 Return the best-match overlay section for PC:
3044 If PC matches a mapped overlay section's VMA, return that section.
3045 Else if PC matches an unmapped section's VMA, return that section.
3046 Else if PC matches an unmapped section's LMA, return that section. */
3049 find_pc_overlay (CORE_ADDR pc)
3051 struct objfile *objfile;
3052 struct obj_section *osect, *best_match = NULL;
3054 if (overlay_debugging)
3055 ALL_OBJSECTIONS (objfile, osect)
3056 if (section_is_overlay (osect->the_bfd_section))
3058 if (pc_in_mapped_range (pc, osect->the_bfd_section))
3060 if (overlay_is_mapped (osect))
3061 return osect->the_bfd_section;
3065 else if (pc_in_unmapped_range (pc, osect->the_bfd_section))
3068 return best_match ? best_match->the_bfd_section : NULL;
3071 /* Function: find_pc_mapped_section (PC)
3072 If PC falls into the VMA address range of an overlay section that is
3073 currently marked as MAPPED, return that section. Else return NULL. */
3076 find_pc_mapped_section (CORE_ADDR pc)
3078 struct objfile *objfile;
3079 struct obj_section *osect;
3081 if (overlay_debugging)
3082 ALL_OBJSECTIONS (objfile, osect)
3083 if (pc_in_mapped_range (pc, osect->the_bfd_section) &&
3084 overlay_is_mapped (osect))
3085 return osect->the_bfd_section;
3090 /* Function: list_overlays_command
3091 Print a list of mapped sections and their PC ranges */
3094 list_overlays_command (char *args, int from_tty)
3097 struct objfile *objfile;
3098 struct obj_section *osect;
3100 if (overlay_debugging)
3101 ALL_OBJSECTIONS (objfile, osect)
3102 if (overlay_is_mapped (osect))
3108 vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section);
3109 lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section);
3110 size = bfd_get_section_size (osect->the_bfd_section);
3111 name = bfd_section_name (objfile->obfd, osect->the_bfd_section);
3113 printf_filtered ("Section %s, loaded at ", name);
3114 deprecated_print_address_numeric (lma, 1, gdb_stdout);
3115 puts_filtered (" - ");
3116 deprecated_print_address_numeric (lma + size, 1, gdb_stdout);
3117 printf_filtered (", mapped at ");
3118 deprecated_print_address_numeric (vma, 1, gdb_stdout);
3119 puts_filtered (" - ");
3120 deprecated_print_address_numeric (vma + size, 1, gdb_stdout);
3121 puts_filtered ("\n");
3126 printf_filtered (_("No sections are mapped.\n"));
3129 /* Function: map_overlay_command
3130 Mark the named section as mapped (ie. residing at its VMA address). */
3133 map_overlay_command (char *args, int from_tty)
3135 struct objfile *objfile, *objfile2;
3136 struct obj_section *sec, *sec2;
3139 if (!overlay_debugging)
3141 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3142 the 'overlay manual' command."));
3144 if (args == 0 || *args == 0)
3145 error (_("Argument required: name of an overlay section"));
3147 /* First, find a section matching the user supplied argument */
3148 ALL_OBJSECTIONS (objfile, sec)
3149 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
3151 /* Now, check to see if the section is an overlay. */
3152 bfdsec = sec->the_bfd_section;
3153 if (!section_is_overlay (bfdsec))
3154 continue; /* not an overlay section */
3156 /* Mark the overlay as "mapped" */
3157 sec->ovly_mapped = 1;
3159 /* Next, make a pass and unmap any sections that are
3160 overlapped by this new section: */
3161 ALL_OBJSECTIONS (objfile2, sec2)
3162 if (sec2->ovly_mapped
3164 && sec->the_bfd_section != sec2->the_bfd_section
3165 && sections_overlap (sec->the_bfd_section,
3166 sec2->the_bfd_section))
3169 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3170 bfd_section_name (objfile->obfd,
3171 sec2->the_bfd_section));
3172 sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2 */
3176 error (_("No overlay section called %s"), args);
3179 /* Function: unmap_overlay_command
3180 Mark the overlay section as unmapped
3181 (ie. resident in its LMA address range, rather than the VMA range). */
3184 unmap_overlay_command (char *args, int from_tty)
3186 struct objfile *objfile;
3187 struct obj_section *sec;
3189 if (!overlay_debugging)
3191 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3192 the 'overlay manual' command."));
3194 if (args == 0 || *args == 0)
3195 error (_("Argument required: name of an overlay section"));
3197 /* First, find a section matching the user supplied argument */
3198 ALL_OBJSECTIONS (objfile, sec)
3199 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
3201 if (!sec->ovly_mapped)
3202 error (_("Section %s is not mapped"), args);
3203 sec->ovly_mapped = 0;
3206 error (_("No overlay section called %s"), args);
3209 /* Function: overlay_auto_command
3210 A utility command to turn on overlay debugging.
3211 Possibly this should be done via a set/show command. */
3214 overlay_auto_command (char *args, int from_tty)
3216 overlay_debugging = ovly_auto;
3217 enable_overlay_breakpoints ();
3219 printf_unfiltered (_("Automatic overlay debugging enabled."));
3222 /* Function: overlay_manual_command
3223 A utility command to turn on overlay debugging.
3224 Possibly this should be done via a set/show command. */
3227 overlay_manual_command (char *args, int from_tty)
3229 overlay_debugging = ovly_on;
3230 disable_overlay_breakpoints ();
3232 printf_unfiltered (_("Overlay debugging enabled."));
3235 /* Function: overlay_off_command
3236 A utility command to turn on overlay debugging.
3237 Possibly this should be done via a set/show command. */
3240 overlay_off_command (char *args, int from_tty)
3242 overlay_debugging = ovly_off;
3243 disable_overlay_breakpoints ();
3245 printf_unfiltered (_("Overlay debugging disabled."));
3249 overlay_load_command (char *args, int from_tty)
3251 if (target_overlay_update)
3252 (*target_overlay_update) (NULL);
3254 error (_("This target does not know how to read its overlay state."));
3257 /* Function: overlay_command
3258 A place-holder for a mis-typed command */
3260 /* Command list chain containing all defined "overlay" subcommands. */
3261 struct cmd_list_element *overlaylist;
3264 overlay_command (char *args, int from_tty)
3267 ("\"overlay\" must be followed by the name of an overlay command.\n");
3268 help_list (overlaylist, "overlay ", -1, gdb_stdout);
3272 /* Target Overlays for the "Simplest" overlay manager:
3274 This is GDB's default target overlay layer. It works with the
3275 minimal overlay manager supplied as an example by Cygnus. The
3276 entry point is via a function pointer "target_overlay_update",
3277 so targets that use a different runtime overlay manager can
3278 substitute their own overlay_update function and take over the
3281 The overlay_update function pokes around in the target's data structures
3282 to see what overlays are mapped, and updates GDB's overlay mapping with
3285 In this simple implementation, the target data structures are as follows:
3286 unsigned _novlys; /# number of overlay sections #/
3287 unsigned _ovly_table[_novlys][4] = {
3288 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3289 {..., ..., ..., ...},
3291 unsigned _novly_regions; /# number of overlay regions #/
3292 unsigned _ovly_region_table[_novly_regions][3] = {
3293 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3296 These functions will attempt to update GDB's mappedness state in the
3297 symbol section table, based on the target's mappedness state.
3299 To do this, we keep a cached copy of the target's _ovly_table, and
3300 attempt to detect when the cached copy is invalidated. The main
3301 entry point is "simple_overlay_update(SECT), which looks up SECT in
3302 the cached table and re-reads only the entry for that section from
3303 the target (whenever possible).
3306 /* Cached, dynamically allocated copies of the target data structures: */
3307 static unsigned (*cache_ovly_table)[4] = 0;
3309 static unsigned (*cache_ovly_region_table)[3] = 0;
3311 static unsigned cache_novlys = 0;
3313 static unsigned cache_novly_regions = 0;
3315 static CORE_ADDR cache_ovly_table_base = 0;
3317 static CORE_ADDR cache_ovly_region_table_base = 0;
3321 VMA, SIZE, LMA, MAPPED
3323 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
3325 /* Throw away the cached copy of _ovly_table */
3327 simple_free_overlay_table (void)
3329 if (cache_ovly_table)
3330 xfree (cache_ovly_table);
3332 cache_ovly_table = NULL;
3333 cache_ovly_table_base = 0;
3337 /* Throw away the cached copy of _ovly_region_table */
3339 simple_free_overlay_region_table (void)
3341 if (cache_ovly_region_table)
3342 xfree (cache_ovly_region_table);
3343 cache_novly_regions = 0;
3344 cache_ovly_region_table = NULL;
3345 cache_ovly_region_table_base = 0;
3349 /* Read an array of ints from the target into a local buffer.
3350 Convert to host order. int LEN is number of ints */
3352 read_target_long_array (CORE_ADDR memaddr, unsigned int *myaddr, int len)
3354 /* FIXME (alloca): Not safe if array is very large. */
3355 char *buf = alloca (len * TARGET_LONG_BYTES);
3358 read_memory (memaddr, buf, len * TARGET_LONG_BYTES);
3359 for (i = 0; i < len; i++)
3360 myaddr[i] = extract_unsigned_integer (TARGET_LONG_BYTES * i + buf,
3364 /* Find and grab a copy of the target _ovly_table
3365 (and _novlys, which is needed for the table's size) */
3367 simple_read_overlay_table (void)
3369 struct minimal_symbol *novlys_msym, *ovly_table_msym;
3371 simple_free_overlay_table ();
3372 novlys_msym = lookup_minimal_symbol ("_novlys", NULL, NULL);
3375 error (_("Error reading inferior's overlay table: "
3376 "couldn't find `_novlys' variable\n"
3377 "in inferior. Use `overlay manual' mode."));
3381 ovly_table_msym = lookup_minimal_symbol ("_ovly_table", NULL, NULL);
3382 if (! ovly_table_msym)
3384 error (_("Error reading inferior's overlay table: couldn't find "
3385 "`_ovly_table' array\n"
3386 "in inferior. Use `overlay manual' mode."));
3390 cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym), 4);
3392 = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table));
3393 cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (ovly_table_msym);
3394 read_target_long_array (cache_ovly_table_base,
3395 (int *) cache_ovly_table,
3398 return 1; /* SUCCESS */
3402 /* Find and grab a copy of the target _ovly_region_table
3403 (and _novly_regions, which is needed for the table's size) */
3405 simple_read_overlay_region_table (void)
3407 struct minimal_symbol *msym;
3409 simple_free_overlay_region_table ();
3410 msym = lookup_minimal_symbol ("_novly_regions", NULL, NULL);
3412 cache_novly_regions = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4);
3414 return 0; /* failure */
3415 cache_ovly_region_table = (void *) xmalloc (cache_novly_regions * 12);
3416 if (cache_ovly_region_table != NULL)
3418 msym = lookup_minimal_symbol ("_ovly_region_table", NULL, NULL);
3421 cache_ovly_region_table_base = SYMBOL_VALUE_ADDRESS (msym);
3422 read_target_long_array (cache_ovly_region_table_base,
3423 (int *) cache_ovly_region_table,
3424 cache_novly_regions * 3);
3427 return 0; /* failure */
3430 return 0; /* failure */
3431 return 1; /* SUCCESS */
3435 /* Function: simple_overlay_update_1
3436 A helper function for simple_overlay_update. Assuming a cached copy
3437 of _ovly_table exists, look through it to find an entry whose vma,
3438 lma and size match those of OSECT. Re-read the entry and make sure
3439 it still matches OSECT (else the table may no longer be valid).
3440 Set OSECT's mapped state to match the entry. Return: 1 for
3441 success, 0 for failure. */
3444 simple_overlay_update_1 (struct obj_section *osect)
3447 bfd *obfd = osect->objfile->obfd;
3448 asection *bsect = osect->the_bfd_section;
3450 size = bfd_get_section_size (osect->the_bfd_section);
3451 for (i = 0; i < cache_novlys; i++)
3452 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3453 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3454 /* && cache_ovly_table[i][SIZE] == size */ )
3456 read_target_long_array (cache_ovly_table_base + i * TARGET_LONG_BYTES,
3457 (int *) cache_ovly_table[i], 4);
3458 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3459 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3460 /* && cache_ovly_table[i][SIZE] == size */ )
3462 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3465 else /* Warning! Warning! Target's ovly table has changed! */
3471 /* Function: simple_overlay_update
3472 If OSECT is NULL, then update all sections' mapped state
3473 (after re-reading the entire target _ovly_table).
3474 If OSECT is non-NULL, then try to find a matching entry in the
3475 cached ovly_table and update only OSECT's mapped state.
3476 If a cached entry can't be found or the cache isn't valid, then
3477 re-read the entire cache, and go ahead and update all sections. */
3480 simple_overlay_update (struct obj_section *osect)
3482 struct objfile *objfile;
3484 /* Were we given an osect to look up? NULL means do all of them. */
3486 /* Have we got a cached copy of the target's overlay table? */
3487 if (cache_ovly_table != NULL)
3488 /* Does its cached location match what's currently in the symtab? */
3489 if (cache_ovly_table_base ==
3490 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL, NULL)))
3491 /* Then go ahead and try to look up this single section in the cache */
3492 if (simple_overlay_update_1 (osect))
3493 /* Found it! We're done. */
3496 /* Cached table no good: need to read the entire table anew.
3497 Or else we want all the sections, in which case it's actually
3498 more efficient to read the whole table in one block anyway. */
3500 if (! simple_read_overlay_table ())
3503 /* Now may as well update all sections, even if only one was requested. */
3504 ALL_OBJSECTIONS (objfile, osect)
3505 if (section_is_overlay (osect->the_bfd_section))
3508 bfd *obfd = osect->objfile->obfd;
3509 asection *bsect = osect->the_bfd_section;
3511 size = bfd_get_section_size (bsect);
3512 for (i = 0; i < cache_novlys; i++)
3513 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3514 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3515 /* && cache_ovly_table[i][SIZE] == size */ )
3516 { /* obj_section matches i'th entry in ovly_table */
3517 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3518 break; /* finished with inner for loop: break out */
3523 /* Set the output sections and output offsets for section SECTP in
3524 ABFD. The relocation code in BFD will read these offsets, so we
3525 need to be sure they're initialized. We map each section to itself,
3526 with no offset; this means that SECTP->vma will be honored. */
3529 symfile_dummy_outputs (bfd *abfd, asection *sectp, void *dummy)
3531 sectp->output_section = sectp;
3532 sectp->output_offset = 0;
3535 /* Relocate the contents of a debug section SECTP in ABFD. The
3536 contents are stored in BUF if it is non-NULL, or returned in a
3537 malloc'd buffer otherwise.
3539 For some platforms and debug info formats, shared libraries contain
3540 relocations against the debug sections (particularly for DWARF-2;
3541 one affected platform is PowerPC GNU/Linux, although it depends on
3542 the version of the linker in use). Also, ELF object files naturally
3543 have unresolved relocations for their debug sections. We need to apply
3544 the relocations in order to get the locations of symbols correct. */
3547 symfile_relocate_debug_section (bfd *abfd, asection *sectp, bfd_byte *buf)
3549 /* We're only interested in debugging sections with relocation
3551 if ((sectp->flags & SEC_RELOC) == 0)
3553 if ((sectp->flags & SEC_DEBUGGING) == 0)
3556 /* We will handle section offsets properly elsewhere, so relocate as if
3557 all sections begin at 0. */
3558 bfd_map_over_sections (abfd, symfile_dummy_outputs, NULL);
3560 return bfd_simple_get_relocated_section_contents (abfd, sectp, buf, NULL);
3564 _initialize_symfile (void)
3566 struct cmd_list_element *c;
3568 c = add_cmd ("symbol-file", class_files, symbol_file_command, _("\
3569 Load symbol table from executable file FILE.\n\
3570 The `file' command can also load symbol tables, as well as setting the file\n\
3571 to execute."), &cmdlist);
3572 set_cmd_completer (c, filename_completer);
3574 c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command, _("\
3575 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3576 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3577 ADDR is the starting address of the file's text.\n\
3578 The optional arguments are section-name section-address pairs and\n\
3579 should be specified if the data and bss segments are not contiguous\n\
3580 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3582 set_cmd_completer (c, filename_completer);
3584 c = add_cmd ("add-shared-symbol-files", class_files,
3585 add_shared_symbol_files_command, _("\
3586 Load the symbols from shared objects in the dynamic linker's link map."),
3588 c = add_alias_cmd ("assf", "add-shared-symbol-files", class_files, 1,
3591 c = add_cmd ("load", class_files, load_command, _("\
3592 Dynamically load FILE into the running program, and record its symbols\n\
3593 for access from GDB."), &cmdlist);
3594 set_cmd_completer (c, filename_completer);
3596 add_setshow_boolean_cmd ("symbol-reloading", class_support,
3597 &symbol_reloading, _("\
3598 Set dynamic symbol table reloading multiple times in one run."), _("\
3599 Show dynamic symbol table reloading multiple times in one run."), NULL,
3601 show_symbol_reloading,
3602 &setlist, &showlist);
3604 add_prefix_cmd ("overlay", class_support, overlay_command,
3605 _("Commands for debugging overlays."), &overlaylist,
3606 "overlay ", 0, &cmdlist);
3608 add_com_alias ("ovly", "overlay", class_alias, 1);
3609 add_com_alias ("ov", "overlay", class_alias, 1);
3611 add_cmd ("map-overlay", class_support, map_overlay_command,
3612 _("Assert that an overlay section is mapped."), &overlaylist);
3614 add_cmd ("unmap-overlay", class_support, unmap_overlay_command,
3615 _("Assert that an overlay section is unmapped."), &overlaylist);
3617 add_cmd ("list-overlays", class_support, list_overlays_command,
3618 _("List mappings of overlay sections."), &overlaylist);
3620 add_cmd ("manual", class_support, overlay_manual_command,
3621 _("Enable overlay debugging."), &overlaylist);
3622 add_cmd ("off", class_support, overlay_off_command,
3623 _("Disable overlay debugging."), &overlaylist);
3624 add_cmd ("auto", class_support, overlay_auto_command,
3625 _("Enable automatic overlay debugging."), &overlaylist);
3626 add_cmd ("load-target", class_support, overlay_load_command,
3627 _("Read the overlay mapping state from the target."), &overlaylist);
3629 /* Filename extension to source language lookup table: */
3630 init_filename_language_table ();
3631 add_setshow_string_noescape_cmd ("extension-language", class_files,
3633 Set mapping between filename extension and source language."), _("\
3634 Show mapping between filename extension and source language."), _("\
3635 Usage: set extension-language .foo bar"),
3636 set_ext_lang_command,
3638 &setlist, &showlist);
3640 add_info ("extensions", info_ext_lang_command,
3641 _("All filename extensions associated with a source language."));
3643 add_setshow_integer_cmd ("download-write-size", class_obscure,
3644 &download_write_size, _("\
3645 Set the write size used when downloading a program."), _("\
3646 Show the write size used when downloading a program."), _("\
3647 Only used when downloading a program onto a remote\n\
3648 target. Specify zero, or a negative value, to disable\n\
3649 blocked writes. The actual size of each transfer is also\n\
3650 limited by the size of the target packet and the memory\n\
3653 show_download_write_size,
3654 &setlist, &showlist);
3656 debug_file_directory = xstrdup (DEBUGDIR);
3657 add_setshow_optional_filename_cmd ("debug-file-directory", class_support,
3658 &debug_file_directory, _("\
3659 Set the directory where separate debug symbols are searched for."), _("\
3660 Show the directory where separate debug symbols are searched for."), _("\
3661 Separate debug symbols are first searched for in the same\n\
3662 directory as the binary, then in the `" DEBUG_SUBDIRECTORY "' subdirectory,\n\
3663 and lastly at the path of the directory of the binary with\n\
3664 the global debug-file directory prepended."),
3666 show_debug_file_directory,
3667 &setlist, &showlist);