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 /* If non-zero, shared library symbols will be added automatically
165 when the inferior is created, new libraries are loaded, or when
166 attaching to the inferior. This is almost always what users will
167 want to have happen; but for very large programs, the startup time
168 will be excessive, and so if this is a problem, the user can clear
169 this flag and then add the shared library symbols as needed. Note
170 that there is a potential for confusion, since if the shared
171 library symbols are not loaded, commands like "info fun" will *not*
172 report all the functions that are actually present. */
174 int auto_solib_add = 1;
176 /* For systems that support it, a threshold size in megabytes. If
177 automatically adding a new library's symbol table to those already
178 known to the debugger would cause the total shared library symbol
179 size to exceed this threshhold, then the shlib's symbols are not
180 added. The threshold is ignored if the user explicitly asks for a
181 shlib to be added, such as when using the "sharedlibrary"
184 int auto_solib_limit;
187 /* This compares two partial symbols by names, using strcmp_iw_ordered
188 for the comparison. */
191 compare_psymbols (const void *s1p, const void *s2p)
193 struct partial_symbol *const *s1 = s1p;
194 struct partial_symbol *const *s2 = s2p;
196 return strcmp_iw_ordered (SYMBOL_SEARCH_NAME (*s1),
197 SYMBOL_SEARCH_NAME (*s2));
201 sort_pst_symbols (struct partial_symtab *pst)
203 /* Sort the global list; don't sort the static list */
205 qsort (pst->objfile->global_psymbols.list + pst->globals_offset,
206 pst->n_global_syms, sizeof (struct partial_symbol *),
210 /* Make a null terminated copy of the string at PTR with SIZE characters in
211 the obstack pointed to by OBSTACKP . Returns the address of the copy.
212 Note that the string at PTR does not have to be null terminated, I.E. it
213 may be part of a larger string and we are only saving a substring. */
216 obsavestring (const char *ptr, int size, struct obstack *obstackp)
218 char *p = (char *) obstack_alloc (obstackp, size + 1);
219 /* Open-coded memcpy--saves function call time. These strings are usually
220 short. FIXME: Is this really still true with a compiler that can
223 const char *p1 = ptr;
225 const char *end = ptr + size;
233 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
234 in the obstack pointed to by OBSTACKP. */
237 obconcat (struct obstack *obstackp, const char *s1, const char *s2,
240 int len = strlen (s1) + strlen (s2) + strlen (s3) + 1;
241 char *val = (char *) obstack_alloc (obstackp, len);
248 /* True if we are nested inside psymtab_to_symtab. */
250 int currently_reading_symtab = 0;
253 decrement_reading_symtab (void *dummy)
255 currently_reading_symtab--;
258 /* Get the symbol table that corresponds to a partial_symtab.
259 This is fast after the first time you do it. In fact, there
260 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
264 psymtab_to_symtab (struct partial_symtab *pst)
266 /* If it's been looked up before, return it. */
270 /* If it has not yet been read in, read it. */
273 struct cleanup *back_to = make_cleanup (decrement_reading_symtab, NULL);
274 currently_reading_symtab++;
275 (*pst->read_symtab) (pst);
276 do_cleanups (back_to);
282 /* Remember the lowest-addressed loadable section we've seen.
283 This function is called via bfd_map_over_sections.
285 In case of equal vmas, the section with the largest size becomes the
286 lowest-addressed loadable section.
288 If the vmas and sizes are equal, the last section is considered the
289 lowest-addressed loadable section. */
292 find_lowest_section (bfd *abfd, asection *sect, void *obj)
294 asection **lowest = (asection **) obj;
296 if (0 == (bfd_get_section_flags (abfd, sect) & SEC_LOAD))
299 *lowest = sect; /* First loadable section */
300 else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect))
301 *lowest = sect; /* A lower loadable section */
302 else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect)
303 && (bfd_section_size (abfd, (*lowest))
304 <= bfd_section_size (abfd, sect)))
308 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
310 struct section_addr_info *
311 alloc_section_addr_info (size_t num_sections)
313 struct section_addr_info *sap;
316 size = (sizeof (struct section_addr_info)
317 + sizeof (struct other_sections) * (num_sections - 1));
318 sap = (struct section_addr_info *) xmalloc (size);
319 memset (sap, 0, size);
320 sap->num_sections = num_sections;
326 /* Return a freshly allocated copy of ADDRS. The section names, if
327 any, are also freshly allocated copies of those in ADDRS. */
328 struct section_addr_info *
329 copy_section_addr_info (struct section_addr_info *addrs)
331 struct section_addr_info *copy
332 = alloc_section_addr_info (addrs->num_sections);
335 copy->num_sections = addrs->num_sections;
336 for (i = 0; i < addrs->num_sections; i++)
338 copy->other[i].addr = addrs->other[i].addr;
339 if (addrs->other[i].name)
340 copy->other[i].name = xstrdup (addrs->other[i].name);
342 copy->other[i].name = NULL;
343 copy->other[i].sectindex = addrs->other[i].sectindex;
351 /* Build (allocate and populate) a section_addr_info struct from
352 an existing section table. */
354 extern struct section_addr_info *
355 build_section_addr_info_from_section_table (const struct section_table *start,
356 const struct section_table *end)
358 struct section_addr_info *sap;
359 const struct section_table *stp;
362 sap = alloc_section_addr_info (end - start);
364 for (stp = start, oidx = 0; stp != end; stp++)
366 if (bfd_get_section_flags (stp->bfd,
367 stp->the_bfd_section) & (SEC_ALLOC | SEC_LOAD)
368 && oidx < end - start)
370 sap->other[oidx].addr = stp->addr;
371 sap->other[oidx].name
372 = xstrdup (bfd_section_name (stp->bfd, stp->the_bfd_section));
373 sap->other[oidx].sectindex = stp->the_bfd_section->index;
382 /* Free all memory allocated by build_section_addr_info_from_section_table. */
385 free_section_addr_info (struct section_addr_info *sap)
389 for (idx = 0; idx < sap->num_sections; idx++)
390 if (sap->other[idx].name)
391 xfree (sap->other[idx].name);
396 /* Initialize OBJFILE's sect_index_* members. */
398 init_objfile_sect_indices (struct objfile *objfile)
403 sect = bfd_get_section_by_name (objfile->obfd, ".text");
405 objfile->sect_index_text = sect->index;
407 sect = bfd_get_section_by_name (objfile->obfd, ".data");
409 objfile->sect_index_data = sect->index;
411 sect = bfd_get_section_by_name (objfile->obfd, ".bss");
413 objfile->sect_index_bss = sect->index;
415 sect = bfd_get_section_by_name (objfile->obfd, ".rodata");
417 objfile->sect_index_rodata = sect->index;
419 /* This is where things get really weird... We MUST have valid
420 indices for the various sect_index_* members or gdb will abort.
421 So if for example, there is no ".text" section, we have to
422 accomodate that. Except when explicitly adding symbol files at
423 some address, section_offsets contains nothing but zeros, so it
424 doesn't matter which slot in section_offsets the individual
425 sect_index_* members index into. So if they are all zero, it is
426 safe to just point all the currently uninitialized indices to the
429 for (i = 0; i < objfile->num_sections; i++)
431 if (ANOFFSET (objfile->section_offsets, i) != 0)
436 if (i == objfile->num_sections)
438 if (objfile->sect_index_text == -1)
439 objfile->sect_index_text = 0;
440 if (objfile->sect_index_data == -1)
441 objfile->sect_index_data = 0;
442 if (objfile->sect_index_bss == -1)
443 objfile->sect_index_bss = 0;
444 if (objfile->sect_index_rodata == -1)
445 objfile->sect_index_rodata = 0;
450 /* Parse the user's idea of an offset for dynamic linking, into our idea
451 of how to represent it for fast symbol reading. This is the default
452 version of the sym_fns.sym_offsets function for symbol readers that
453 don't need to do anything special. It allocates a section_offsets table
454 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
457 default_symfile_offsets (struct objfile *objfile,
458 struct section_addr_info *addrs)
462 objfile->num_sections = bfd_count_sections (objfile->obfd);
463 objfile->section_offsets = (struct section_offsets *)
464 obstack_alloc (&objfile->objfile_obstack,
465 SIZEOF_N_SECTION_OFFSETS (objfile->num_sections));
466 memset (objfile->section_offsets, 0,
467 SIZEOF_N_SECTION_OFFSETS (objfile->num_sections));
469 /* Now calculate offsets for section that were specified by the
471 for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++)
473 struct other_sections *osp ;
475 osp = &addrs->other[i] ;
479 /* Record all sections in offsets */
480 /* The section_offsets in the objfile are here filled in using
482 (objfile->section_offsets)->offsets[osp->sectindex] = osp->addr;
485 /* Remember the bfd indexes for the .text, .data, .bss and
487 init_objfile_sect_indices (objfile);
491 /* Process a symbol file, as either the main file or as a dynamically
494 OBJFILE is where the symbols are to be read from.
496 ADDRS is the list of section load addresses. If the user has given
497 an 'add-symbol-file' command, then this is the list of offsets and
498 addresses he or she provided as arguments to the command; or, if
499 we're handling a shared library, these are the actual addresses the
500 sections are loaded at, according to the inferior's dynamic linker
501 (as gleaned by GDB's shared library code). We convert each address
502 into an offset from the section VMA's as it appears in the object
503 file, and then call the file's sym_offsets function to convert this
504 into a format-specific offset table --- a `struct section_offsets'.
505 If ADDRS is non-zero, OFFSETS must be zero.
507 OFFSETS is a table of section offsets already in the right
508 format-specific representation. NUM_OFFSETS is the number of
509 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
510 assume this is the proper table the call to sym_offsets described
511 above would produce. Instead of calling sym_offsets, we just dump
512 it right into objfile->section_offsets. (When we're re-reading
513 symbols from an objfile, we don't have the original load address
514 list any more; all we have is the section offset table.) If
515 OFFSETS is non-zero, ADDRS must be zero.
517 MAINLINE is nonzero if this is the main symbol file, or zero if
518 it's an extra symbol file such as dynamically loaded code.
520 VERBO is nonzero if the caller has printed a verbose message about
521 the symbol reading (and complaints can be more terse about it). */
524 syms_from_objfile (struct objfile *objfile,
525 struct section_addr_info *addrs,
526 struct section_offsets *offsets,
531 struct section_addr_info *local_addr = NULL;
532 struct cleanup *old_chain;
534 gdb_assert (! (addrs && offsets));
536 init_entry_point_info (objfile);
537 find_sym_fns (objfile);
539 if (objfile->sf == NULL)
540 return; /* No symbols. */
542 /* Make sure that partially constructed symbol tables will be cleaned up
543 if an error occurs during symbol reading. */
544 old_chain = make_cleanup_free_objfile (objfile);
546 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
547 list. We now establish the convention that an addr of zero means
548 no load address was specified. */
549 if (! addrs && ! offsets)
552 = alloc_section_addr_info (bfd_count_sections (objfile->obfd));
553 make_cleanup (xfree, local_addr);
557 /* Now either addrs or offsets is non-zero. */
561 /* We will modify the main symbol table, make sure that all its users
562 will be cleaned up if an error occurs during symbol reading. */
563 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
565 /* Since no error yet, throw away the old symbol table. */
567 if (symfile_objfile != NULL)
569 free_objfile (symfile_objfile);
570 symfile_objfile = NULL;
573 /* Currently we keep symbols from the add-symbol-file command.
574 If the user wants to get rid of them, they should do "symbol-file"
575 without arguments first. Not sure this is the best behavior
578 (*objfile->sf->sym_new_init) (objfile);
581 /* Convert addr into an offset rather than an absolute address.
582 We find the lowest address of a loaded segment in the objfile,
583 and assume that <addr> is where that got loaded.
585 We no longer warn if the lowest section is not a text segment (as
586 happens for the PA64 port. */
587 if (!mainline && addrs && addrs->other[0].name)
589 asection *lower_sect;
591 CORE_ADDR lower_offset;
594 /* Find lowest loadable section to be used as starting point for
595 continguous sections. FIXME!! won't work without call to find
596 .text first, but this assumes text is lowest section. */
597 lower_sect = bfd_get_section_by_name (objfile->obfd, ".text");
598 if (lower_sect == NULL)
599 bfd_map_over_sections (objfile->obfd, find_lowest_section,
601 if (lower_sect == NULL)
602 warning (_("no loadable sections found in added symbol-file %s"),
605 if ((bfd_get_section_flags (objfile->obfd, lower_sect) & SEC_CODE) == 0)
606 warning (_("Lowest section in %s is %s at %s"),
608 bfd_section_name (objfile->obfd, lower_sect),
609 paddr (bfd_section_vma (objfile->obfd, lower_sect)));
610 if (lower_sect != NULL)
611 lower_offset = bfd_section_vma (objfile->obfd, lower_sect);
615 /* Calculate offsets for the loadable sections.
616 FIXME! Sections must be in order of increasing loadable section
617 so that contiguous sections can use the lower-offset!!!
619 Adjust offsets if the segments are not contiguous.
620 If the section is contiguous, its offset should be set to
621 the offset of the highest loadable section lower than it
622 (the loadable section directly below it in memory).
623 this_offset = lower_offset = lower_addr - lower_orig_addr */
625 for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++)
627 if (addrs->other[i].addr != 0)
629 sect = bfd_get_section_by_name (objfile->obfd,
630 addrs->other[i].name);
634 -= bfd_section_vma (objfile->obfd, sect);
635 lower_offset = addrs->other[i].addr;
636 /* This is the index used by BFD. */
637 addrs->other[i].sectindex = sect->index ;
641 warning (_("section %s not found in %s"),
642 addrs->other[i].name,
644 addrs->other[i].addr = 0;
648 addrs->other[i].addr = lower_offset;
652 /* Initialize symbol reading routines for this objfile, allow complaints to
653 appear for this new file, and record how verbose to be, then do the
654 initial symbol reading for this file. */
656 (*objfile->sf->sym_init) (objfile);
657 clear_complaints (&symfile_complaints, 1, verbo);
660 (*objfile->sf->sym_offsets) (objfile, addrs);
663 size_t size = SIZEOF_N_SECTION_OFFSETS (num_offsets);
665 /* Just copy in the offset table directly as given to us. */
666 objfile->num_sections = num_offsets;
667 objfile->section_offsets
668 = ((struct section_offsets *)
669 obstack_alloc (&objfile->objfile_obstack, size));
670 memcpy (objfile->section_offsets, offsets, size);
672 init_objfile_sect_indices (objfile);
675 #ifndef DEPRECATED_IBM6000_TARGET
676 /* This is a SVR4/SunOS specific hack, I think. In any event, it
677 screws RS/6000. sym_offsets should be doing this sort of thing,
678 because it knows the mapping between bfd sections and
680 /* This is a hack. As far as I can tell, section offsets are not
681 target dependent. They are all set to addr with a couple of
682 exceptions. The exceptions are sysvr4 shared libraries, whose
683 offsets are kept in solib structures anyway and rs6000 xcoff
684 which handles shared libraries in a completely unique way.
686 Section offsets are built similarly, except that they are built
687 by adding addr in all cases because there is no clear mapping
688 from section_offsets into actual sections. Note that solib.c
689 has a different algorithm for finding section offsets.
691 These should probably all be collapsed into some target
692 independent form of shared library support. FIXME. */
696 struct obj_section *s;
698 /* Map section offsets in "addr" back to the object's
699 sections by comparing the section names with bfd's
700 section names. Then adjust the section address by
701 the offset. */ /* for gdb/13815 */
703 ALL_OBJFILE_OSECTIONS (objfile, s)
705 CORE_ADDR s_addr = 0;
709 !s_addr && i < addrs->num_sections && addrs->other[i].name;
711 if (strcmp (bfd_section_name (s->objfile->obfd,
713 addrs->other[i].name) == 0)
714 s_addr = addrs->other[i].addr; /* end added for gdb/13815 */
716 s->addr -= s->offset;
718 s->endaddr -= s->offset;
719 s->endaddr += s_addr;
723 #endif /* not DEPRECATED_IBM6000_TARGET */
725 (*objfile->sf->sym_read) (objfile, mainline);
727 /* Don't allow char * to have a typename (else would get caddr_t).
728 Ditto void *. FIXME: Check whether this is now done by all the
729 symbol readers themselves (many of them now do), and if so remove
732 TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0;
733 TYPE_NAME (lookup_pointer_type (builtin_type_void)) = 0;
735 /* Mark the objfile has having had initial symbol read attempted. Note
736 that this does not mean we found any symbols... */
738 objfile->flags |= OBJF_SYMS;
740 /* Discard cleanups as symbol reading was successful. */
742 discard_cleanups (old_chain);
745 /* Perform required actions after either reading in the initial
746 symbols for a new objfile, or mapping in the symbols from a reusable
750 new_symfile_objfile (struct objfile *objfile, int mainline, int verbo)
753 /* If this is the main symbol file we have to clean up all users of the
754 old main symbol file. Otherwise it is sufficient to fixup all the
755 breakpoints that may have been redefined by this symbol file. */
758 /* OK, make it the "real" symbol file. */
759 symfile_objfile = objfile;
761 clear_symtab_users ();
765 breakpoint_re_set ();
768 /* We're done reading the symbol file; finish off complaints. */
769 clear_complaints (&symfile_complaints, 0, verbo);
772 /* Process a symbol file, as either the main file or as a dynamically
775 ABFD is a BFD already open on the file, as from symfile_bfd_open.
776 This BFD will be closed on error, and is always consumed by this function.
778 FROM_TTY says how verbose to be.
780 MAINLINE specifies whether this is the main symbol file, or whether
781 it's an extra symbol file such as dynamically loaded code.
783 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
784 syms_from_objfile, above. ADDRS is ignored when MAINLINE is
787 Upon success, returns a pointer to the objfile that was added.
788 Upon failure, jumps back to command level (never returns). */
789 static struct objfile *
790 symbol_file_add_with_addrs_or_offsets (bfd *abfd, int from_tty,
791 struct section_addr_info *addrs,
792 struct section_offsets *offsets,
794 int mainline, int flags)
796 struct objfile *objfile;
797 struct partial_symtab *psymtab;
799 struct section_addr_info *orig_addrs = NULL;
800 struct cleanup *my_cleanups;
801 const char *name = bfd_get_filename (abfd);
803 my_cleanups = make_cleanup_bfd_close (abfd);
805 /* Give user a chance to burp if we'd be
806 interactively wiping out any existing symbols. */
808 if ((have_full_symbols () || have_partial_symbols ())
811 && !query ("Load new symbol table from \"%s\"? ", name))
812 error (_("Not confirmed."));
814 objfile = allocate_objfile (abfd, flags);
815 discard_cleanups (my_cleanups);
819 orig_addrs = copy_section_addr_info (addrs);
820 make_cleanup_free_section_addr_info (orig_addrs);
823 /* We either created a new mapped symbol table, mapped an existing
824 symbol table file which has not had initial symbol reading
825 performed, or need to read an unmapped symbol table. */
826 if (from_tty || info_verbose)
828 if (deprecated_pre_add_symbol_hook)
829 deprecated_pre_add_symbol_hook (name);
832 printf_unfiltered (_("Reading symbols from %s..."), name);
834 gdb_flush (gdb_stdout);
837 syms_from_objfile (objfile, addrs, offsets, num_offsets,
840 /* We now have at least a partial symbol table. Check to see if the
841 user requested that all symbols be read on initial access via either
842 the gdb startup command line or on a per symbol file basis. Expand
843 all partial symbol tables for this objfile if so. */
845 if ((flags & OBJF_READNOW) || readnow_symbol_files)
847 if (from_tty || info_verbose)
849 printf_unfiltered (_("expanding to full symbols..."));
851 gdb_flush (gdb_stdout);
854 for (psymtab = objfile->psymtabs;
856 psymtab = psymtab->next)
858 psymtab_to_symtab (psymtab);
862 debugfile = find_separate_debug_file (objfile);
867 objfile->separate_debug_objfile
868 = symbol_file_add (debugfile, from_tty, orig_addrs, 0, flags);
872 objfile->separate_debug_objfile
873 = symbol_file_add (debugfile, from_tty, NULL, 0, flags);
875 objfile->separate_debug_objfile->separate_debug_objfile_backlink
878 /* Put the separate debug object before the normal one, this is so that
879 usage of the ALL_OBJFILES_SAFE macro will stay safe. */
880 put_objfile_before (objfile->separate_debug_objfile, objfile);
885 if (!have_partial_symbols () && !have_full_symbols ())
888 printf_filtered (_("(no debugging symbols found)"));
889 if (from_tty || info_verbose)
890 printf_filtered ("...");
892 printf_filtered ("\n");
896 if (from_tty || info_verbose)
898 if (deprecated_post_add_symbol_hook)
899 deprecated_post_add_symbol_hook ();
902 printf_unfiltered (_("done.\n"));
906 /* We print some messages regardless of whether 'from_tty ||
907 info_verbose' is true, so make sure they go out at the right
909 gdb_flush (gdb_stdout);
911 do_cleanups (my_cleanups);
913 if (objfile->sf == NULL)
914 return objfile; /* No symbols. */
916 new_symfile_objfile (objfile, mainline, from_tty);
918 if (deprecated_target_new_objfile_hook)
919 deprecated_target_new_objfile_hook (objfile);
921 bfd_cache_close_all ();
926 /* Process the symbol file ABFD, as either the main file or as a
927 dynamically loaded file.
929 See symbol_file_add_with_addrs_or_offsets's comments for
932 symbol_file_add_from_bfd (bfd *abfd, int from_tty,
933 struct section_addr_info *addrs,
934 int mainline, int flags)
936 return symbol_file_add_with_addrs_or_offsets (abfd,
937 from_tty, addrs, 0, 0,
942 /* Process a symbol file, as either the main file or as a dynamically
943 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
946 symbol_file_add (char *name, int from_tty, struct section_addr_info *addrs,
947 int mainline, int flags)
949 return symbol_file_add_from_bfd (symfile_bfd_open (name), from_tty,
950 addrs, mainline, flags);
954 /* Call symbol_file_add() with default values and update whatever is
955 affected by the loading of a new main().
956 Used when the file is supplied in the gdb command line
957 and by some targets with special loading requirements.
958 The auxiliary function, symbol_file_add_main_1(), has the flags
959 argument for the switches that can only be specified in the symbol_file
963 symbol_file_add_main (char *args, int from_tty)
965 symbol_file_add_main_1 (args, from_tty, 0);
969 symbol_file_add_main_1 (char *args, int from_tty, int flags)
971 symbol_file_add (args, from_tty, NULL, 1, flags);
973 /* Getting new symbols may change our opinion about
974 what is frameless. */
975 reinit_frame_cache ();
977 set_initial_language ();
981 symbol_file_clear (int from_tty)
983 if ((have_full_symbols () || have_partial_symbols ())
985 && !query ("Discard symbol table from `%s'? ",
986 symfile_objfile->name))
987 error (_("Not confirmed."));
988 free_all_objfiles ();
990 /* solib descriptors may have handles to objfiles. Since their
991 storage has just been released, we'd better wipe the solib
994 #if defined(SOLIB_RESTART)
998 symfile_objfile = NULL;
1000 printf_unfiltered (_("No symbol file now.\n"));
1004 get_debug_link_info (struct objfile *objfile, unsigned long *crc32_out)
1007 bfd_size_type debuglink_size;
1008 unsigned long crc32;
1013 sect = bfd_get_section_by_name (objfile->obfd, ".gnu_debuglink");
1018 debuglink_size = bfd_section_size (objfile->obfd, sect);
1020 contents = xmalloc (debuglink_size);
1021 bfd_get_section_contents (objfile->obfd, sect, contents,
1022 (file_ptr)0, (bfd_size_type)debuglink_size);
1024 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1025 crc_offset = strlen (contents) + 1;
1026 crc_offset = (crc_offset + 3) & ~3;
1028 crc32 = bfd_get_32 (objfile->obfd, (bfd_byte *) (contents + crc_offset));
1035 separate_debug_file_exists (const char *name, unsigned long crc)
1037 unsigned long file_crc = 0;
1039 char buffer[8*1024];
1042 fd = open (name, O_RDONLY | O_BINARY);
1046 while ((count = read (fd, buffer, sizeof (buffer))) > 0)
1047 file_crc = gnu_debuglink_crc32 (file_crc, buffer, count);
1051 return crc == file_crc;
1054 static char *debug_file_directory = NULL;
1056 #if ! defined (DEBUG_SUBDIRECTORY)
1057 #define DEBUG_SUBDIRECTORY ".debug"
1061 find_separate_debug_file (struct objfile *objfile)
1068 bfd_size_type debuglink_size;
1069 unsigned long crc32;
1072 basename = get_debug_link_info (objfile, &crc32);
1074 if (basename == NULL)
1077 dir = xstrdup (objfile->name);
1079 /* Strip off the final filename part, leaving the directory name,
1080 followed by a slash. Objfile names should always be absolute and
1081 tilde-expanded, so there should always be a slash in there
1083 for (i = strlen(dir) - 1; i >= 0; i--)
1085 if (IS_DIR_SEPARATOR (dir[i]))
1088 gdb_assert (i >= 0 && IS_DIR_SEPARATOR (dir[i]));
1091 debugfile = alloca (strlen (debug_file_directory) + 1
1093 + strlen (DEBUG_SUBDIRECTORY)
1098 /* First try in the same directory as the original file. */
1099 strcpy (debugfile, dir);
1100 strcat (debugfile, basename);
1102 if (separate_debug_file_exists (debugfile, crc32))
1106 return xstrdup (debugfile);
1109 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1110 strcpy (debugfile, dir);
1111 strcat (debugfile, DEBUG_SUBDIRECTORY);
1112 strcat (debugfile, "/");
1113 strcat (debugfile, basename);
1115 if (separate_debug_file_exists (debugfile, crc32))
1119 return xstrdup (debugfile);
1122 /* Then try in the global debugfile directory. */
1123 strcpy (debugfile, debug_file_directory);
1124 strcat (debugfile, "/");
1125 strcat (debugfile, dir);
1126 strcat (debugfile, basename);
1128 if (separate_debug_file_exists (debugfile, crc32))
1132 return xstrdup (debugfile);
1141 /* This is the symbol-file command. Read the file, analyze its
1142 symbols, and add a struct symtab to a symtab list. The syntax of
1143 the command is rather bizarre--(1) buildargv implements various
1144 quoting conventions which are undocumented and have little or
1145 nothing in common with the way things are quoted (or not quoted)
1146 elsewhere in GDB, (2) options are used, which are not generally
1147 used in GDB (perhaps "set mapped on", "set readnow on" would be
1148 better), (3) the order of options matters, which is contrary to GNU
1149 conventions (because it is confusing and inconvenient). */
1150 /* Note: ezannoni 2000-04-17. This function used to have support for
1151 rombug (see remote-os9k.c). It consisted of a call to target_link()
1152 (target.c) to get the address of the text segment from the target,
1153 and pass that to symbol_file_add(). This is no longer supported. */
1156 symbol_file_command (char *args, int from_tty)
1160 struct cleanup *cleanups;
1161 int flags = OBJF_USERLOADED;
1167 symbol_file_clear (from_tty);
1171 if ((argv = buildargv (args)) == NULL)
1175 cleanups = make_cleanup_freeargv (argv);
1176 while (*argv != NULL)
1178 if (strcmp (*argv, "-readnow") == 0)
1179 flags |= OBJF_READNOW;
1180 else if (**argv == '-')
1181 error (_("unknown option `%s'"), *argv);
1186 symbol_file_add_main_1 (name, from_tty, flags);
1193 error (_("no symbol file name was specified"));
1195 do_cleanups (cleanups);
1199 /* Set the initial language.
1201 A better solution would be to record the language in the psymtab when reading
1202 partial symbols, and then use it (if known) to set the language. This would
1203 be a win for formats that encode the language in an easily discoverable place,
1204 such as DWARF. For stabs, we can jump through hoops looking for specially
1205 named symbols or try to intuit the language from the specific type of stabs
1206 we find, but we can't do that until later when we read in full symbols.
1210 set_initial_language (void)
1212 struct partial_symtab *pst;
1213 enum language lang = language_unknown;
1215 pst = find_main_psymtab ();
1218 if (pst->filename != NULL)
1220 lang = deduce_language_from_filename (pst->filename);
1222 if (lang == language_unknown)
1224 /* Make C the default language */
1227 set_language (lang);
1228 expected_language = current_language; /* Don't warn the user */
1232 /* Open file specified by NAME and hand it off to BFD for preliminary
1233 analysis. Result is a newly initialized bfd *, which includes a newly
1234 malloc'd` copy of NAME (tilde-expanded and made absolute).
1235 In case of trouble, error() is called. */
1238 symfile_bfd_open (char *name)
1242 char *absolute_name;
1246 name = tilde_expand (name); /* Returns 1st new malloc'd copy */
1248 /* Look down path for it, allocate 2nd new malloc'd copy. */
1249 desc = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, name, O_RDONLY | O_BINARY,
1251 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1254 char *exename = alloca (strlen (name) + 5);
1255 strcat (strcpy (exename, name), ".exe");
1256 desc = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, exename,
1257 O_RDONLY | O_BINARY, 0, &absolute_name);
1262 make_cleanup (xfree, name);
1263 perror_with_name (name);
1265 xfree (name); /* Free 1st new malloc'd copy */
1266 name = absolute_name; /* Keep 2nd malloc'd copy in bfd */
1267 /* It'll be freed in free_objfile(). */
1269 sym_bfd = bfd_fdopenr (name, gnutarget, desc);
1273 make_cleanup (xfree, name);
1274 error (_("\"%s\": can't open to read symbols: %s."), name,
1275 bfd_errmsg (bfd_get_error ()));
1277 bfd_set_cacheable (sym_bfd, 1);
1279 if (!bfd_check_format (sym_bfd, bfd_object))
1281 /* FIXME: should be checking for errors from bfd_close (for one thing,
1282 on error it does not free all the storage associated with the
1284 bfd_close (sym_bfd); /* This also closes desc */
1285 make_cleanup (xfree, name);
1286 error (_("\"%s\": can't read symbols: %s."), name,
1287 bfd_errmsg (bfd_get_error ()));
1292 /* Return the section index for the given section name. Return -1 if
1293 the section was not found. */
1295 get_section_index (struct objfile *objfile, char *section_name)
1297 asection *sect = bfd_get_section_by_name (objfile->obfd, section_name);
1304 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1305 startup by the _initialize routine in each object file format reader,
1306 to register information about each format the the reader is prepared
1310 add_symtab_fns (struct sym_fns *sf)
1312 sf->next = symtab_fns;
1317 /* Initialize to read symbols from the symbol file sym_bfd. It either
1318 returns or calls error(). The result is an initialized struct sym_fns
1319 in the objfile structure, that contains cached information about the
1323 find_sym_fns (struct objfile *objfile)
1326 enum bfd_flavour our_flavour = bfd_get_flavour (objfile->obfd);
1327 char *our_target = bfd_get_target (objfile->obfd);
1329 if (our_flavour == bfd_target_srec_flavour
1330 || our_flavour == bfd_target_ihex_flavour
1331 || our_flavour == bfd_target_tekhex_flavour)
1332 return; /* No symbols. */
1334 for (sf = symtab_fns; sf != NULL; sf = sf->next)
1336 if (our_flavour == sf->sym_flavour)
1342 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1343 bfd_get_target (objfile->obfd));
1346 /* This function runs the load command of our current target. */
1349 load_command (char *arg, int from_tty)
1352 arg = get_exec_file (1);
1353 target_load (arg, from_tty);
1355 /* After re-loading the executable, we don't really know which
1356 overlays are mapped any more. */
1357 overlay_cache_invalid = 1;
1360 /* This version of "load" should be usable for any target. Currently
1361 it is just used for remote targets, not inftarg.c or core files,
1362 on the theory that only in that case is it useful.
1364 Avoiding xmodem and the like seems like a win (a) because we don't have
1365 to worry about finding it, and (b) On VMS, fork() is very slow and so
1366 we don't want to run a subprocess. On the other hand, I'm not sure how
1367 performance compares. */
1369 static int download_write_size = 512;
1370 static int validate_download = 0;
1372 /* Callback service function for generic_load (bfd_map_over_sections). */
1375 add_section_size_callback (bfd *abfd, asection *asec, void *data)
1377 bfd_size_type *sum = data;
1379 *sum += bfd_get_section_size (asec);
1382 /* Opaque data for load_section_callback. */
1383 struct load_section_data {
1384 unsigned long load_offset;
1385 unsigned long write_count;
1386 unsigned long data_count;
1387 bfd_size_type total_size;
1390 /* Callback service function for generic_load (bfd_map_over_sections). */
1393 load_section_callback (bfd *abfd, asection *asec, void *data)
1395 struct load_section_data *args = data;
1397 if (bfd_get_section_flags (abfd, asec) & SEC_LOAD)
1399 bfd_size_type size = bfd_get_section_size (asec);
1403 struct cleanup *old_chain;
1404 CORE_ADDR lma = bfd_section_lma (abfd, asec) + args->load_offset;
1405 bfd_size_type block_size;
1407 const char *sect_name = bfd_get_section_name (abfd, asec);
1410 if (download_write_size > 0 && size > download_write_size)
1411 block_size = download_write_size;
1415 buffer = xmalloc (size);
1416 old_chain = make_cleanup (xfree, buffer);
1418 /* Is this really necessary? I guess it gives the user something
1419 to look at during a long download. */
1420 ui_out_message (uiout, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1421 sect_name, paddr_nz (size), paddr_nz (lma));
1423 bfd_get_section_contents (abfd, asec, buffer, 0, size);
1429 bfd_size_type this_transfer = size - sent;
1431 if (this_transfer >= block_size)
1432 this_transfer = block_size;
1433 len = target_write_memory_partial (lma, buffer,
1434 this_transfer, &err);
1437 if (validate_download)
1439 /* Broken memories and broken monitors manifest
1440 themselves here when bring new computers to
1441 life. This doubles already slow downloads. */
1442 /* NOTE: cagney/1999-10-18: A more efficient
1443 implementation might add a verify_memory()
1444 method to the target vector and then use
1445 that. remote.c could implement that method
1446 using the ``qCRC'' packet. */
1447 char *check = xmalloc (len);
1448 struct cleanup *verify_cleanups =
1449 make_cleanup (xfree, check);
1451 if (target_read_memory (lma, check, len) != 0)
1452 error (_("Download verify read failed at 0x%s"),
1454 if (memcmp (buffer, check, len) != 0)
1455 error (_("Download verify compare failed at 0x%s"),
1457 do_cleanups (verify_cleanups);
1459 args->data_count += len;
1462 args->write_count += 1;
1465 || (deprecated_ui_load_progress_hook != NULL
1466 && deprecated_ui_load_progress_hook (sect_name, sent)))
1467 error (_("Canceled the download"));
1469 if (deprecated_show_load_progress != NULL)
1470 deprecated_show_load_progress (sect_name, sent, size,
1474 while (sent < size);
1477 error (_("Memory access error while loading section %s."), sect_name);
1479 do_cleanups (old_chain);
1485 generic_load (char *args, int from_tty)
1489 time_t start_time, end_time; /* Start and end times of download */
1491 struct cleanup *old_cleanups;
1493 struct load_section_data cbdata;
1496 cbdata.load_offset = 0; /* Offset to add to vma for each section. */
1497 cbdata.write_count = 0; /* Number of writes needed. */
1498 cbdata.data_count = 0; /* Number of bytes written to target memory. */
1499 cbdata.total_size = 0; /* Total size of all bfd sectors. */
1501 /* Parse the input argument - the user can specify a load offset as
1502 a second argument. */
1503 filename = xmalloc (strlen (args) + 1);
1504 old_cleanups = make_cleanup (xfree, filename);
1505 strcpy (filename, args);
1506 offptr = strchr (filename, ' ');
1511 cbdata.load_offset = strtoul (offptr, &endptr, 0);
1512 if (offptr == endptr)
1513 error (_("Invalid download offset:%s."), offptr);
1517 cbdata.load_offset = 0;
1519 /* Open the file for loading. */
1520 loadfile_bfd = bfd_openr (filename, gnutarget);
1521 if (loadfile_bfd == NULL)
1523 perror_with_name (filename);
1527 /* FIXME: should be checking for errors from bfd_close (for one thing,
1528 on error it does not free all the storage associated with the
1530 make_cleanup_bfd_close (loadfile_bfd);
1532 if (!bfd_check_format (loadfile_bfd, bfd_object))
1534 error (_("\"%s\" is not an object file: %s"), filename,
1535 bfd_errmsg (bfd_get_error ()));
1538 bfd_map_over_sections (loadfile_bfd, add_section_size_callback,
1539 (void *) &cbdata.total_size);
1541 start_time = time (NULL);
1543 bfd_map_over_sections (loadfile_bfd, load_section_callback, &cbdata);
1545 end_time = time (NULL);
1547 entry = bfd_get_start_address (loadfile_bfd);
1548 ui_out_text (uiout, "Start address ");
1549 ui_out_field_fmt (uiout, "address", "0x%s", paddr_nz (entry));
1550 ui_out_text (uiout, ", load size ");
1551 ui_out_field_fmt (uiout, "load-size", "%lu", cbdata.data_count);
1552 ui_out_text (uiout, "\n");
1553 /* We were doing this in remote-mips.c, I suspect it is right
1554 for other targets too. */
1557 /* FIXME: are we supposed to call symbol_file_add or not? According
1558 to a comment from remote-mips.c (where a call to symbol_file_add
1559 was commented out), making the call confuses GDB if more than one
1560 file is loaded in. Some targets do (e.g., remote-vx.c) but
1561 others don't (or didn't - perhaps they have all been deleted). */
1563 print_transfer_performance (gdb_stdout, cbdata.data_count,
1564 cbdata.write_count, end_time - start_time);
1566 do_cleanups (old_cleanups);
1569 /* Report how fast the transfer went. */
1571 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1572 replaced by print_transfer_performance (with a very different
1573 function signature). */
1576 report_transfer_performance (unsigned long data_count, time_t start_time,
1579 print_transfer_performance (gdb_stdout, data_count,
1580 end_time - start_time, 0);
1584 print_transfer_performance (struct ui_file *stream,
1585 unsigned long data_count,
1586 unsigned long write_count,
1587 unsigned long time_count)
1589 ui_out_text (uiout, "Transfer rate: ");
1592 ui_out_field_fmt (uiout, "transfer-rate", "%lu",
1593 (data_count * 8) / time_count);
1594 ui_out_text (uiout, " bits/sec");
1598 ui_out_field_fmt (uiout, "transferred-bits", "%lu", (data_count * 8));
1599 ui_out_text (uiout, " bits in <1 sec");
1601 if (write_count > 0)
1603 ui_out_text (uiout, ", ");
1604 ui_out_field_fmt (uiout, "write-rate", "%lu", data_count / write_count);
1605 ui_out_text (uiout, " bytes/write");
1607 ui_out_text (uiout, ".\n");
1610 /* This function allows the addition of incrementally linked object files.
1611 It does not modify any state in the target, only in the debugger. */
1612 /* Note: ezannoni 2000-04-13 This function/command used to have a
1613 special case syntax for the rombug target (Rombug is the boot
1614 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
1615 rombug case, the user doesn't need to supply a text address,
1616 instead a call to target_link() (in target.c) would supply the
1617 value to use. We are now discontinuing this type of ad hoc syntax. */
1620 add_symbol_file_command (char *args, int from_tty)
1622 char *filename = NULL;
1623 int flags = OBJF_USERLOADED;
1625 int expecting_option = 0;
1626 int section_index = 0;
1630 int expecting_sec_name = 0;
1631 int expecting_sec_addr = 0;
1639 struct section_addr_info *section_addrs;
1640 struct sect_opt *sect_opts = NULL;
1641 size_t num_sect_opts = 0;
1642 struct cleanup *my_cleanups = make_cleanup (null_cleanup, NULL);
1645 sect_opts = (struct sect_opt *) xmalloc (num_sect_opts
1646 * sizeof (struct sect_opt));
1651 error (_("add-symbol-file takes a file name and an address"));
1653 /* Make a copy of the string that we can safely write into. */
1654 args = xstrdup (args);
1656 while (*args != '\000')
1658 /* Any leading spaces? */
1659 while (isspace (*args))
1662 /* Point arg to the beginning of the argument. */
1665 /* Move args pointer over the argument. */
1666 while ((*args != '\000') && !isspace (*args))
1669 /* If there are more arguments, terminate arg and
1671 if (*args != '\000')
1674 /* Now process the argument. */
1677 /* The first argument is the file name. */
1678 filename = tilde_expand (arg);
1679 make_cleanup (xfree, filename);
1684 /* The second argument is always the text address at which
1685 to load the program. */
1686 sect_opts[section_index].name = ".text";
1687 sect_opts[section_index].value = arg;
1688 if (++section_index > num_sect_opts)
1691 sect_opts = ((struct sect_opt *)
1692 xrealloc (sect_opts,
1694 * sizeof (struct sect_opt)));
1699 /* It's an option (starting with '-') or it's an argument
1704 if (strcmp (arg, "-readnow") == 0)
1705 flags |= OBJF_READNOW;
1706 else if (strcmp (arg, "-s") == 0)
1708 expecting_sec_name = 1;
1709 expecting_sec_addr = 1;
1714 if (expecting_sec_name)
1716 sect_opts[section_index].name = arg;
1717 expecting_sec_name = 0;
1720 if (expecting_sec_addr)
1722 sect_opts[section_index].value = arg;
1723 expecting_sec_addr = 0;
1724 if (++section_index > num_sect_opts)
1727 sect_opts = ((struct sect_opt *)
1728 xrealloc (sect_opts,
1730 * sizeof (struct sect_opt)));
1734 error (_("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*"));
1740 /* Print the prompt for the query below. And save the arguments into
1741 a sect_addr_info structure to be passed around to other
1742 functions. We have to split this up into separate print
1743 statements because hex_string returns a local static
1746 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename);
1747 section_addrs = alloc_section_addr_info (section_index);
1748 make_cleanup (xfree, section_addrs);
1749 for (i = 0; i < section_index; i++)
1752 char *val = sect_opts[i].value;
1753 char *sec = sect_opts[i].name;
1755 addr = parse_and_eval_address (val);
1757 /* Here we store the section offsets in the order they were
1758 entered on the command line. */
1759 section_addrs->other[sec_num].name = sec;
1760 section_addrs->other[sec_num].addr = addr;
1761 printf_unfiltered ("\t%s_addr = %s\n",
1762 sec, hex_string ((unsigned long)addr));
1765 /* The object's sections are initialized when a
1766 call is made to build_objfile_section_table (objfile).
1767 This happens in reread_symbols.
1768 At this point, we don't know what file type this is,
1769 so we can't determine what section names are valid. */
1772 if (from_tty && (!query ("%s", "")))
1773 error (_("Not confirmed."));
1775 symbol_file_add (filename, from_tty, section_addrs, 0, flags);
1777 /* Getting new symbols may change our opinion about what is
1779 reinit_frame_cache ();
1780 do_cleanups (my_cleanups);
1784 add_shared_symbol_files_command (char *args, int from_tty)
1786 #ifdef ADD_SHARED_SYMBOL_FILES
1787 ADD_SHARED_SYMBOL_FILES (args, from_tty);
1789 error (_("This command is not available in this configuration of GDB."));
1793 /* Re-read symbols if a symbol-file has changed. */
1795 reread_symbols (void)
1797 struct objfile *objfile;
1800 struct stat new_statbuf;
1803 /* With the addition of shared libraries, this should be modified,
1804 the load time should be saved in the partial symbol tables, since
1805 different tables may come from different source files. FIXME.
1806 This routine should then walk down each partial symbol table
1807 and see if the symbol table that it originates from has been changed */
1809 for (objfile = object_files; objfile; objfile = objfile->next)
1813 #ifdef DEPRECATED_IBM6000_TARGET
1814 /* If this object is from a shared library, then you should
1815 stat on the library name, not member name. */
1817 if (objfile->obfd->my_archive)
1818 res = stat (objfile->obfd->my_archive->filename, &new_statbuf);
1821 res = stat (objfile->name, &new_statbuf);
1824 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1825 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
1829 new_modtime = new_statbuf.st_mtime;
1830 if (new_modtime != objfile->mtime)
1832 struct cleanup *old_cleanups;
1833 struct section_offsets *offsets;
1835 char *obfd_filename;
1837 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
1840 /* There are various functions like symbol_file_add,
1841 symfile_bfd_open, syms_from_objfile, etc., which might
1842 appear to do what we want. But they have various other
1843 effects which we *don't* want. So we just do stuff
1844 ourselves. We don't worry about mapped files (for one thing,
1845 any mapped file will be out of date). */
1847 /* If we get an error, blow away this objfile (not sure if
1848 that is the correct response for things like shared
1850 old_cleanups = make_cleanup_free_objfile (objfile);
1851 /* We need to do this whenever any symbols go away. */
1852 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
1854 /* Clean up any state BFD has sitting around. We don't need
1855 to close the descriptor but BFD lacks a way of closing the
1856 BFD without closing the descriptor. */
1857 obfd_filename = bfd_get_filename (objfile->obfd);
1858 if (!bfd_close (objfile->obfd))
1859 error (_("Can't close BFD for %s: %s"), objfile->name,
1860 bfd_errmsg (bfd_get_error ()));
1861 objfile->obfd = bfd_openr (obfd_filename, gnutarget);
1862 if (objfile->obfd == NULL)
1863 error (_("Can't open %s to read symbols."), objfile->name);
1864 /* bfd_openr sets cacheable to true, which is what we want. */
1865 if (!bfd_check_format (objfile->obfd, bfd_object))
1866 error (_("Can't read symbols from %s: %s."), objfile->name,
1867 bfd_errmsg (bfd_get_error ()));
1869 /* Save the offsets, we will nuke them with the rest of the
1871 num_offsets = objfile->num_sections;
1872 offsets = ((struct section_offsets *)
1873 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets)));
1874 memcpy (offsets, objfile->section_offsets,
1875 SIZEOF_N_SECTION_OFFSETS (num_offsets));
1877 /* Nuke all the state that we will re-read. Much of the following
1878 code which sets things to NULL really is necessary to tell
1879 other parts of GDB that there is nothing currently there. */
1881 /* FIXME: Do we have to free a whole linked list, or is this
1883 if (objfile->global_psymbols.list)
1884 xfree (objfile->global_psymbols.list);
1885 memset (&objfile->global_psymbols, 0,
1886 sizeof (objfile->global_psymbols));
1887 if (objfile->static_psymbols.list)
1888 xfree (objfile->static_psymbols.list);
1889 memset (&objfile->static_psymbols, 0,
1890 sizeof (objfile->static_psymbols));
1892 /* Free the obstacks for non-reusable objfiles */
1893 bcache_xfree (objfile->psymbol_cache);
1894 objfile->psymbol_cache = bcache_xmalloc ();
1895 bcache_xfree (objfile->macro_cache);
1896 objfile->macro_cache = bcache_xmalloc ();
1897 if (objfile->demangled_names_hash != NULL)
1899 htab_delete (objfile->demangled_names_hash);
1900 objfile->demangled_names_hash = NULL;
1902 obstack_free (&objfile->objfile_obstack, 0);
1903 objfile->sections = NULL;
1904 objfile->symtabs = NULL;
1905 objfile->psymtabs = NULL;
1906 objfile->free_psymtabs = NULL;
1907 objfile->cp_namespace_symtab = NULL;
1908 objfile->msymbols = NULL;
1909 objfile->deprecated_sym_private = NULL;
1910 objfile->minimal_symbol_count = 0;
1911 memset (&objfile->msymbol_hash, 0,
1912 sizeof (objfile->msymbol_hash));
1913 memset (&objfile->msymbol_demangled_hash, 0,
1914 sizeof (objfile->msymbol_demangled_hash));
1915 objfile->fundamental_types = NULL;
1916 clear_objfile_data (objfile);
1917 if (objfile->sf != NULL)
1919 (*objfile->sf->sym_finish) (objfile);
1922 /* We never make this a mapped file. */
1924 objfile->psymbol_cache = bcache_xmalloc ();
1925 objfile->macro_cache = bcache_xmalloc ();
1926 /* obstack_init also initializes the obstack so it is
1927 empty. We could use obstack_specify_allocation but
1928 gdb_obstack.h specifies the alloc/dealloc
1930 obstack_init (&objfile->objfile_obstack);
1931 if (build_objfile_section_table (objfile))
1933 error (_("Can't find the file sections in `%s': %s"),
1934 objfile->name, bfd_errmsg (bfd_get_error ()));
1936 terminate_minimal_symbol_table (objfile);
1938 /* We use the same section offsets as from last time. I'm not
1939 sure whether that is always correct for shared libraries. */
1940 objfile->section_offsets = (struct section_offsets *)
1941 obstack_alloc (&objfile->objfile_obstack,
1942 SIZEOF_N_SECTION_OFFSETS (num_offsets));
1943 memcpy (objfile->section_offsets, offsets,
1944 SIZEOF_N_SECTION_OFFSETS (num_offsets));
1945 objfile->num_sections = num_offsets;
1947 /* What the hell is sym_new_init for, anyway? The concept of
1948 distinguishing between the main file and additional files
1949 in this way seems rather dubious. */
1950 if (objfile == symfile_objfile)
1952 (*objfile->sf->sym_new_init) (objfile);
1955 (*objfile->sf->sym_init) (objfile);
1956 clear_complaints (&symfile_complaints, 1, 1);
1957 /* The "mainline" parameter is a hideous hack; I think leaving it
1958 zero is OK since dbxread.c also does what it needs to do if
1959 objfile->global_psymbols.size is 0. */
1960 (*objfile->sf->sym_read) (objfile, 0);
1961 if (!have_partial_symbols () && !have_full_symbols ())
1964 printf_unfiltered (_("(no debugging symbols found)\n"));
1967 objfile->flags |= OBJF_SYMS;
1969 /* We're done reading the symbol file; finish off complaints. */
1970 clear_complaints (&symfile_complaints, 0, 1);
1972 /* Getting new symbols may change our opinion about what is
1975 reinit_frame_cache ();
1977 /* Discard cleanups as symbol reading was successful. */
1978 discard_cleanups (old_cleanups);
1980 /* If the mtime has changed between the time we set new_modtime
1981 and now, we *want* this to be out of date, so don't call stat
1983 objfile->mtime = new_modtime;
1985 reread_separate_symbols (objfile);
1991 clear_symtab_users ();
1995 /* Handle separate debug info for OBJFILE, which has just been
1997 - If we had separate debug info before, but now we don't, get rid
1998 of the separated objfile.
1999 - If we didn't have separated debug info before, but now we do,
2000 read in the new separated debug info file.
2001 - If the debug link points to a different file, toss the old one
2002 and read the new one.
2003 This function does *not* handle the case where objfile is still
2004 using the same separate debug info file, but that file's timestamp
2005 has changed. That case should be handled by the loop in
2006 reread_symbols already. */
2008 reread_separate_symbols (struct objfile *objfile)
2011 unsigned long crc32;
2013 /* Does the updated objfile's debug info live in a
2015 debug_file = find_separate_debug_file (objfile);
2017 if (objfile->separate_debug_objfile)
2019 /* There are two cases where we need to get rid of
2020 the old separated debug info objfile:
2021 - if the new primary objfile doesn't have
2022 separated debug info, or
2023 - if the new primary objfile has separate debug
2024 info, but it's under a different filename.
2026 If the old and new objfiles both have separate
2027 debug info, under the same filename, then we're
2028 okay --- if the separated file's contents have
2029 changed, we will have caught that when we
2030 visited it in this function's outermost
2033 || strcmp (debug_file, objfile->separate_debug_objfile->name) != 0)
2034 free_objfile (objfile->separate_debug_objfile);
2037 /* If the new objfile has separate debug info, and we
2038 haven't loaded it already, do so now. */
2040 && ! objfile->separate_debug_objfile)
2042 /* Use the same section offset table as objfile itself.
2043 Preserve the flags from objfile that make sense. */
2044 objfile->separate_debug_objfile
2045 = (symbol_file_add_with_addrs_or_offsets
2046 (symfile_bfd_open (debug_file),
2047 info_verbose, /* from_tty: Don't override the default. */
2048 0, /* No addr table. */
2049 objfile->section_offsets, objfile->num_sections,
2050 0, /* Not mainline. See comments about this above. */
2051 objfile->flags & (OBJF_REORDERED | OBJF_SHARED | OBJF_READNOW
2052 | OBJF_USERLOADED)));
2053 objfile->separate_debug_objfile->separate_debug_objfile_backlink
2069 static filename_language *filename_language_table;
2070 static int fl_table_size, fl_table_next;
2073 add_filename_language (char *ext, enum language lang)
2075 if (fl_table_next >= fl_table_size)
2077 fl_table_size += 10;
2078 filename_language_table =
2079 xrealloc (filename_language_table,
2080 fl_table_size * sizeof (*filename_language_table));
2083 filename_language_table[fl_table_next].ext = xstrdup (ext);
2084 filename_language_table[fl_table_next].lang = lang;
2088 static char *ext_args;
2091 set_ext_lang_command (char *args, int from_tty, struct cmd_list_element *e)
2094 char *cp = ext_args;
2097 /* First arg is filename extension, starting with '.' */
2099 error (_("'%s': Filename extension must begin with '.'"), ext_args);
2101 /* Find end of first arg. */
2102 while (*cp && !isspace (*cp))
2106 error (_("'%s': two arguments required -- filename extension and language"),
2109 /* Null-terminate first arg */
2112 /* Find beginning of second arg, which should be a source language. */
2113 while (*cp && isspace (*cp))
2117 error (_("'%s': two arguments required -- filename extension and language"),
2120 /* Lookup the language from among those we know. */
2121 lang = language_enum (cp);
2123 /* Now lookup the filename extension: do we already know it? */
2124 for (i = 0; i < fl_table_next; i++)
2125 if (0 == strcmp (ext_args, filename_language_table[i].ext))
2128 if (i >= fl_table_next)
2130 /* new file extension */
2131 add_filename_language (ext_args, lang);
2135 /* redefining a previously known filename extension */
2138 /* query ("Really make files of type %s '%s'?", */
2139 /* ext_args, language_str (lang)); */
2141 xfree (filename_language_table[i].ext);
2142 filename_language_table[i].ext = xstrdup (ext_args);
2143 filename_language_table[i].lang = lang;
2148 info_ext_lang_command (char *args, int from_tty)
2152 printf_filtered (_("Filename extensions and the languages they represent:"));
2153 printf_filtered ("\n\n");
2154 for (i = 0; i < fl_table_next; i++)
2155 printf_filtered ("\t%s\t- %s\n",
2156 filename_language_table[i].ext,
2157 language_str (filename_language_table[i].lang));
2161 init_filename_language_table (void)
2163 if (fl_table_size == 0) /* protect against repetition */
2167 filename_language_table =
2168 xmalloc (fl_table_size * sizeof (*filename_language_table));
2169 add_filename_language (".c", language_c);
2170 add_filename_language (".C", language_cplus);
2171 add_filename_language (".cc", language_cplus);
2172 add_filename_language (".cp", language_cplus);
2173 add_filename_language (".cpp", language_cplus);
2174 add_filename_language (".cxx", language_cplus);
2175 add_filename_language (".c++", language_cplus);
2176 add_filename_language (".java", language_java);
2177 add_filename_language (".class", language_java);
2178 add_filename_language (".m", language_objc);
2179 add_filename_language (".f", language_fortran);
2180 add_filename_language (".F", language_fortran);
2181 add_filename_language (".s", language_asm);
2182 add_filename_language (".S", language_asm);
2183 add_filename_language (".pas", language_pascal);
2184 add_filename_language (".p", language_pascal);
2185 add_filename_language (".pp", language_pascal);
2186 add_filename_language (".adb", language_ada);
2187 add_filename_language (".ads", language_ada);
2188 add_filename_language (".a", language_ada);
2189 add_filename_language (".ada", language_ada);
2194 deduce_language_from_filename (char *filename)
2199 if (filename != NULL)
2200 if ((cp = strrchr (filename, '.')) != NULL)
2201 for (i = 0; i < fl_table_next; i++)
2202 if (strcmp (cp, filename_language_table[i].ext) == 0)
2203 return filename_language_table[i].lang;
2205 return language_unknown;
2210 Allocate and partly initialize a new symbol table. Return a pointer
2211 to it. error() if no space.
2213 Caller must set these fields:
2219 possibly free_named_symtabs (symtab->filename);
2223 allocate_symtab (char *filename, struct objfile *objfile)
2225 struct symtab *symtab;
2227 symtab = (struct symtab *)
2228 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symtab));
2229 memset (symtab, 0, sizeof (*symtab));
2230 symtab->filename = obsavestring (filename, strlen (filename),
2231 &objfile->objfile_obstack);
2232 symtab->fullname = NULL;
2233 symtab->language = deduce_language_from_filename (filename);
2234 symtab->debugformat = obsavestring ("unknown", 7,
2235 &objfile->objfile_obstack);
2237 /* Hook it to the objfile it comes from */
2239 symtab->objfile = objfile;
2240 symtab->next = objfile->symtabs;
2241 objfile->symtabs = symtab;
2243 /* FIXME: This should go away. It is only defined for the Z8000,
2244 and the Z8000 definition of this macro doesn't have anything to
2245 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
2246 here for convenience. */
2247 #ifdef INIT_EXTRA_SYMTAB_INFO
2248 INIT_EXTRA_SYMTAB_INFO (symtab);
2254 struct partial_symtab *
2255 allocate_psymtab (char *filename, struct objfile *objfile)
2257 struct partial_symtab *psymtab;
2259 if (objfile->free_psymtabs)
2261 psymtab = objfile->free_psymtabs;
2262 objfile->free_psymtabs = psymtab->next;
2265 psymtab = (struct partial_symtab *)
2266 obstack_alloc (&objfile->objfile_obstack,
2267 sizeof (struct partial_symtab));
2269 memset (psymtab, 0, sizeof (struct partial_symtab));
2270 psymtab->filename = obsavestring (filename, strlen (filename),
2271 &objfile->objfile_obstack);
2272 psymtab->symtab = NULL;
2274 /* Prepend it to the psymtab list for the objfile it belongs to.
2275 Psymtabs are searched in most recent inserted -> least recent
2278 psymtab->objfile = objfile;
2279 psymtab->next = objfile->psymtabs;
2280 objfile->psymtabs = psymtab;
2283 struct partial_symtab **prev_pst;
2284 psymtab->objfile = objfile;
2285 psymtab->next = NULL;
2286 prev_pst = &(objfile->psymtabs);
2287 while ((*prev_pst) != NULL)
2288 prev_pst = &((*prev_pst)->next);
2289 (*prev_pst) = psymtab;
2297 discard_psymtab (struct partial_symtab *pst)
2299 struct partial_symtab **prev_pst;
2302 Empty psymtabs happen as a result of header files which don't
2303 have any symbols in them. There can be a lot of them. But this
2304 check is wrong, in that a psymtab with N_SLINE entries but
2305 nothing else is not empty, but we don't realize that. Fixing
2306 that without slowing things down might be tricky. */
2308 /* First, snip it out of the psymtab chain */
2310 prev_pst = &(pst->objfile->psymtabs);
2311 while ((*prev_pst) != pst)
2312 prev_pst = &((*prev_pst)->next);
2313 (*prev_pst) = pst->next;
2315 /* Next, put it on a free list for recycling */
2317 pst->next = pst->objfile->free_psymtabs;
2318 pst->objfile->free_psymtabs = pst;
2322 /* Reset all data structures in gdb which may contain references to symbol
2326 clear_symtab_users (void)
2328 /* Someday, we should do better than this, by only blowing away
2329 the things that really need to be blown. */
2330 clear_value_history ();
2332 clear_internalvars ();
2333 breakpoint_re_set ();
2334 set_default_breakpoint (0, 0, 0, 0);
2335 clear_current_source_symtab_and_line ();
2336 clear_pc_function_cache ();
2337 if (deprecated_target_new_objfile_hook)
2338 deprecated_target_new_objfile_hook (NULL);
2342 clear_symtab_users_cleanup (void *ignore)
2344 clear_symtab_users ();
2347 /* clear_symtab_users_once:
2349 This function is run after symbol reading, or from a cleanup.
2350 If an old symbol table was obsoleted, the old symbol table
2351 has been blown away, but the other GDB data structures that may
2352 reference it have not yet been cleared or re-directed. (The old
2353 symtab was zapped, and the cleanup queued, in free_named_symtab()
2356 This function can be queued N times as a cleanup, or called
2357 directly; it will do all the work the first time, and then will be a
2358 no-op until the next time it is queued. This works by bumping a
2359 counter at queueing time. Much later when the cleanup is run, or at
2360 the end of symbol processing (in case the cleanup is discarded), if
2361 the queued count is greater than the "done-count", we do the work
2362 and set the done-count to the queued count. If the queued count is
2363 less than or equal to the done-count, we just ignore the call. This
2364 is needed because reading a single .o file will often replace many
2365 symtabs (one per .h file, for example), and we don't want to reset
2366 the breakpoints N times in the user's face.
2368 The reason we both queue a cleanup, and call it directly after symbol
2369 reading, is because the cleanup protects us in case of errors, but is
2370 discarded if symbol reading is successful. */
2373 /* FIXME: As free_named_symtabs is currently a big noop this function
2374 is no longer needed. */
2375 static void clear_symtab_users_once (void);
2377 static int clear_symtab_users_queued;
2378 static int clear_symtab_users_done;
2381 clear_symtab_users_once (void)
2383 /* Enforce once-per-`do_cleanups'-semantics */
2384 if (clear_symtab_users_queued <= clear_symtab_users_done)
2386 clear_symtab_users_done = clear_symtab_users_queued;
2388 clear_symtab_users ();
2392 /* Delete the specified psymtab, and any others that reference it. */
2395 cashier_psymtab (struct partial_symtab *pst)
2397 struct partial_symtab *ps, *pprev = NULL;
2400 /* Find its previous psymtab in the chain */
2401 for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
2410 /* Unhook it from the chain. */
2411 if (ps == pst->objfile->psymtabs)
2412 pst->objfile->psymtabs = ps->next;
2414 pprev->next = ps->next;
2416 /* FIXME, we can't conveniently deallocate the entries in the
2417 partial_symbol lists (global_psymbols/static_psymbols) that
2418 this psymtab points to. These just take up space until all
2419 the psymtabs are reclaimed. Ditto the dependencies list and
2420 filename, which are all in the objfile_obstack. */
2422 /* We need to cashier any psymtab that has this one as a dependency... */
2424 for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
2426 for (i = 0; i < ps->number_of_dependencies; i++)
2428 if (ps->dependencies[i] == pst)
2430 cashier_psymtab (ps);
2431 goto again; /* Must restart, chain has been munged. */
2438 /* If a symtab or psymtab for filename NAME is found, free it along
2439 with any dependent breakpoints, displays, etc.
2440 Used when loading new versions of object modules with the "add-file"
2441 command. This is only called on the top-level symtab or psymtab's name;
2442 it is not called for subsidiary files such as .h files.
2444 Return value is 1 if we blew away the environment, 0 if not.
2445 FIXME. The return value appears to never be used.
2447 FIXME. I think this is not the best way to do this. We should
2448 work on being gentler to the environment while still cleaning up
2449 all stray pointers into the freed symtab. */
2452 free_named_symtabs (char *name)
2455 /* FIXME: With the new method of each objfile having it's own
2456 psymtab list, this function needs serious rethinking. In particular,
2457 why was it ever necessary to toss psymtabs with specific compilation
2458 unit filenames, as opposed to all psymtabs from a particular symbol
2460 Well, the answer is that some systems permit reloading of particular
2461 compilation units. We want to blow away any old info about these
2462 compilation units, regardless of which objfiles they arrived in. --gnu. */
2465 struct symtab *prev;
2466 struct partial_symtab *ps;
2467 struct blockvector *bv;
2470 /* We only wack things if the symbol-reload switch is set. */
2471 if (!symbol_reloading)
2474 /* Some symbol formats have trouble providing file names... */
2475 if (name == 0 || *name == '\0')
2478 /* Look for a psymtab with the specified name. */
2481 for (ps = partial_symtab_list; ps; ps = ps->next)
2483 if (strcmp (name, ps->filename) == 0)
2485 cashier_psymtab (ps); /* Blow it away...and its little dog, too. */
2486 goto again2; /* Must restart, chain has been munged */
2490 /* Look for a symtab with the specified name. */
2492 for (s = symtab_list; s; s = s->next)
2494 if (strcmp (name, s->filename) == 0)
2501 if (s == symtab_list)
2502 symtab_list = s->next;
2504 prev->next = s->next;
2506 /* For now, queue a delete for all breakpoints, displays, etc., whether
2507 or not they depend on the symtab being freed. This should be
2508 changed so that only those data structures affected are deleted. */
2510 /* But don't delete anything if the symtab is empty.
2511 This test is necessary due to a bug in "dbxread.c" that
2512 causes empty symtabs to be created for N_SO symbols that
2513 contain the pathname of the object file. (This problem
2514 has been fixed in GDB 3.9x). */
2516 bv = BLOCKVECTOR (s);
2517 if (BLOCKVECTOR_NBLOCKS (bv) > 2
2518 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK))
2519 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)))
2521 complaint (&symfile_complaints, _("Replacing old symbols for `%s'"),
2523 clear_symtab_users_queued++;
2524 make_cleanup (clear_symtab_users_once, 0);
2528 complaint (&symfile_complaints, _("Empty symbol table found for `%s'"),
2535 /* It is still possible that some breakpoints will be affected
2536 even though no symtab was found, since the file might have
2537 been compiled without debugging, and hence not be associated
2538 with a symtab. In order to handle this correctly, we would need
2539 to keep a list of text address ranges for undebuggable files.
2540 For now, we do nothing, since this is a fairly obscure case. */
2544 /* FIXME, what about the minimal symbol table? */
2551 /* Allocate and partially fill a partial symtab. It will be
2552 completely filled at the end of the symbol list.
2554 FILENAME is the name of the symbol-file we are reading from. */
2556 struct partial_symtab *
2557 start_psymtab_common (struct objfile *objfile,
2558 struct section_offsets *section_offsets, char *filename,
2559 CORE_ADDR textlow, struct partial_symbol **global_syms,
2560 struct partial_symbol **static_syms)
2562 struct partial_symtab *psymtab;
2564 psymtab = allocate_psymtab (filename, objfile);
2565 psymtab->section_offsets = section_offsets;
2566 psymtab->textlow = textlow;
2567 psymtab->texthigh = psymtab->textlow; /* default */
2568 psymtab->globals_offset = global_syms - objfile->global_psymbols.list;
2569 psymtab->statics_offset = static_syms - objfile->static_psymbols.list;
2573 /* Add a symbol with a long value to a psymtab.
2574 Since one arg is a struct, we pass in a ptr and deref it (sigh).
2575 Return the partial symbol that has been added. */
2577 /* NOTE: carlton/2003-09-11: The reason why we return the partial
2578 symbol is so that callers can get access to the symbol's demangled
2579 name, which they don't have any cheap way to determine otherwise.
2580 (Currenly, dwarf2read.c is the only file who uses that information,
2581 though it's possible that other readers might in the future.)
2582 Elena wasn't thrilled about that, and I don't blame her, but we
2583 couldn't come up with a better way to get that information. If
2584 it's needed in other situations, we could consider breaking up
2585 SYMBOL_SET_NAMES to provide access to the demangled name lookup
2588 const struct partial_symbol *
2589 add_psymbol_to_list (char *name, int namelength, domain_enum domain,
2590 enum address_class class,
2591 struct psymbol_allocation_list *list, long val, /* Value as a long */
2592 CORE_ADDR coreaddr, /* Value as a CORE_ADDR */
2593 enum language language, struct objfile *objfile)
2595 struct partial_symbol *psym;
2596 char *buf = alloca (namelength + 1);
2597 /* psymbol is static so that there will be no uninitialized gaps in the
2598 structure which might contain random data, causing cache misses in
2600 static struct partial_symbol psymbol;
2602 /* Create local copy of the partial symbol */
2603 memcpy (buf, name, namelength);
2604 buf[namelength] = '\0';
2605 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2608 SYMBOL_VALUE (&psymbol) = val;
2612 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
2614 SYMBOL_SECTION (&psymbol) = 0;
2615 SYMBOL_LANGUAGE (&psymbol) = language;
2616 PSYMBOL_DOMAIN (&psymbol) = domain;
2617 PSYMBOL_CLASS (&psymbol) = class;
2619 SYMBOL_SET_NAMES (&psymbol, buf, namelength, objfile);
2621 /* Stash the partial symbol away in the cache */
2622 psym = deprecated_bcache (&psymbol, sizeof (struct partial_symbol),
2623 objfile->psymbol_cache);
2625 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2626 if (list->next >= list->list + list->size)
2628 extend_psymbol_list (list, objfile);
2630 *list->next++ = psym;
2631 OBJSTAT (objfile, n_psyms++);
2636 /* Add a symbol with a long value to a psymtab. This differs from
2637 * add_psymbol_to_list above in taking both a mangled and a demangled
2641 add_psymbol_with_dem_name_to_list (char *name, int namelength, char *dem_name,
2642 int dem_namelength, domain_enum domain,
2643 enum address_class class,
2644 struct psymbol_allocation_list *list, long val, /* Value as a long */
2645 CORE_ADDR coreaddr, /* Value as a CORE_ADDR */
2646 enum language language,
2647 struct objfile *objfile)
2649 struct partial_symbol *psym;
2650 char *buf = alloca (namelength + 1);
2651 /* psymbol is static so that there will be no uninitialized gaps in the
2652 structure which might contain random data, causing cache misses in
2654 static struct partial_symbol psymbol;
2656 /* Create local copy of the partial symbol */
2658 memcpy (buf, name, namelength);
2659 buf[namelength] = '\0';
2660 DEPRECATED_SYMBOL_NAME (&psymbol) = deprecated_bcache (buf, namelength + 1,
2661 objfile->psymbol_cache);
2663 buf = alloca (dem_namelength + 1);
2664 memcpy (buf, dem_name, dem_namelength);
2665 buf[dem_namelength] = '\0';
2670 case language_cplus:
2671 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol) =
2672 deprecated_bcache (buf, dem_namelength + 1, objfile->psymbol_cache);
2674 /* FIXME What should be done for the default case? Ignoring for now. */
2677 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2680 SYMBOL_VALUE (&psymbol) = val;
2684 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
2686 SYMBOL_SECTION (&psymbol) = 0;
2687 SYMBOL_LANGUAGE (&psymbol) = language;
2688 PSYMBOL_DOMAIN (&psymbol) = domain;
2689 PSYMBOL_CLASS (&psymbol) = class;
2690 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language);
2692 /* Stash the partial symbol away in the cache */
2693 psym = deprecated_bcache (&psymbol, sizeof (struct partial_symbol),
2694 objfile->psymbol_cache);
2696 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2697 if (list->next >= list->list + list->size)
2699 extend_psymbol_list (list, objfile);
2701 *list->next++ = psym;
2702 OBJSTAT (objfile, n_psyms++);
2705 /* Initialize storage for partial symbols. */
2708 init_psymbol_list (struct objfile *objfile, int total_symbols)
2710 /* Free any previously allocated psymbol lists. */
2712 if (objfile->global_psymbols.list)
2714 xfree (objfile->global_psymbols.list);
2716 if (objfile->static_psymbols.list)
2718 xfree (objfile->static_psymbols.list);
2721 /* Current best guess is that approximately a twentieth
2722 of the total symbols (in a debugging file) are global or static
2725 objfile->global_psymbols.size = total_symbols / 10;
2726 objfile->static_psymbols.size = total_symbols / 10;
2728 if (objfile->global_psymbols.size > 0)
2730 objfile->global_psymbols.next =
2731 objfile->global_psymbols.list = (struct partial_symbol **)
2732 xmalloc ((objfile->global_psymbols.size
2733 * sizeof (struct partial_symbol *)));
2735 if (objfile->static_psymbols.size > 0)
2737 objfile->static_psymbols.next =
2738 objfile->static_psymbols.list = (struct partial_symbol **)
2739 xmalloc ((objfile->static_psymbols.size
2740 * sizeof (struct partial_symbol *)));
2745 The following code implements an abstraction for debugging overlay sections.
2747 The target model is as follows:
2748 1) The gnu linker will permit multiple sections to be mapped into the
2749 same VMA, each with its own unique LMA (or load address).
2750 2) It is assumed that some runtime mechanism exists for mapping the
2751 sections, one by one, from the load address into the VMA address.
2752 3) This code provides a mechanism for gdb to keep track of which
2753 sections should be considered to be mapped from the VMA to the LMA.
2754 This information is used for symbol lookup, and memory read/write.
2755 For instance, if a section has been mapped then its contents
2756 should be read from the VMA, otherwise from the LMA.
2758 Two levels of debugger support for overlays are available. One is
2759 "manual", in which the debugger relies on the user to tell it which
2760 overlays are currently mapped. This level of support is
2761 implemented entirely in the core debugger, and the information about
2762 whether a section is mapped is kept in the objfile->obj_section table.
2764 The second level of support is "automatic", and is only available if
2765 the target-specific code provides functionality to read the target's
2766 overlay mapping table, and translate its contents for the debugger
2767 (by updating the mapped state information in the obj_section tables).
2769 The interface is as follows:
2771 overlay map <name> -- tell gdb to consider this section mapped
2772 overlay unmap <name> -- tell gdb to consider this section unmapped
2773 overlay list -- list the sections that GDB thinks are mapped
2774 overlay read-target -- get the target's state of what's mapped
2775 overlay off/manual/auto -- set overlay debugging state
2776 Functional interface:
2777 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2778 section, return that section.
2779 find_pc_overlay(pc): find any overlay section that contains
2780 the pc, either in its VMA or its LMA
2781 overlay_is_mapped(sect): true if overlay is marked as mapped
2782 section_is_overlay(sect): true if section's VMA != LMA
2783 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2784 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2785 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2786 overlay_mapped_address(...): map an address from section's LMA to VMA
2787 overlay_unmapped_address(...): map an address from section's VMA to LMA
2788 symbol_overlayed_address(...): Return a "current" address for symbol:
2789 either in VMA or LMA depending on whether
2790 the symbol's section is currently mapped
2793 /* Overlay debugging state: */
2795 enum overlay_debugging_state overlay_debugging = ovly_off;
2796 int overlay_cache_invalid = 0; /* True if need to refresh mapped state */
2798 /* Target vector for refreshing overlay mapped state */
2799 static void simple_overlay_update (struct obj_section *);
2800 void (*target_overlay_update) (struct obj_section *) = simple_overlay_update;
2802 /* Function: section_is_overlay (SECTION)
2803 Returns true if SECTION has VMA not equal to LMA, ie.
2804 SECTION is loaded at an address different from where it will "run". */
2807 section_is_overlay (asection *section)
2809 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2811 if (overlay_debugging)
2812 if (section && section->lma != 0 &&
2813 section->vma != section->lma)
2819 /* Function: overlay_invalidate_all (void)
2820 Invalidate the mapped state of all overlay sections (mark it as stale). */
2823 overlay_invalidate_all (void)
2825 struct objfile *objfile;
2826 struct obj_section *sect;
2828 ALL_OBJSECTIONS (objfile, sect)
2829 if (section_is_overlay (sect->the_bfd_section))
2830 sect->ovly_mapped = -1;
2833 /* Function: overlay_is_mapped (SECTION)
2834 Returns true if section is an overlay, and is currently mapped.
2835 Private: public access is thru function section_is_mapped.
2837 Access to the ovly_mapped flag is restricted to this function, so
2838 that we can do automatic update. If the global flag
2839 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2840 overlay_invalidate_all. If the mapped state of the particular
2841 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2844 overlay_is_mapped (struct obj_section *osect)
2846 if (osect == 0 || !section_is_overlay (osect->the_bfd_section))
2849 switch (overlay_debugging)
2853 return 0; /* overlay debugging off */
2854 case ovly_auto: /* overlay debugging automatic */
2855 /* Unles there is a target_overlay_update function,
2856 there's really nothing useful to do here (can't really go auto) */
2857 if (target_overlay_update)
2859 if (overlay_cache_invalid)
2861 overlay_invalidate_all ();
2862 overlay_cache_invalid = 0;
2864 if (osect->ovly_mapped == -1)
2865 (*target_overlay_update) (osect);
2867 /* fall thru to manual case */
2868 case ovly_on: /* overlay debugging manual */
2869 return osect->ovly_mapped == 1;
2873 /* Function: section_is_mapped
2874 Returns true if section is an overlay, and is currently mapped. */
2877 section_is_mapped (asection *section)
2879 struct objfile *objfile;
2880 struct obj_section *osect;
2882 if (overlay_debugging)
2883 if (section && section_is_overlay (section))
2884 ALL_OBJSECTIONS (objfile, osect)
2885 if (osect->the_bfd_section == section)
2886 return overlay_is_mapped (osect);
2891 /* Function: pc_in_unmapped_range
2892 If PC falls into the lma range of SECTION, return true, else false. */
2895 pc_in_unmapped_range (CORE_ADDR pc, asection *section)
2897 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2901 if (overlay_debugging)
2902 if (section && section_is_overlay (section))
2904 size = bfd_get_section_size (section);
2905 if (section->lma <= pc && pc < section->lma + size)
2911 /* Function: pc_in_mapped_range
2912 If PC falls into the vma range of SECTION, return true, else false. */
2915 pc_in_mapped_range (CORE_ADDR pc, asection *section)
2917 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2921 if (overlay_debugging)
2922 if (section && section_is_overlay (section))
2924 size = bfd_get_section_size (section);
2925 if (section->vma <= pc && pc < section->vma + size)
2932 /* Return true if the mapped ranges of sections A and B overlap, false
2935 sections_overlap (asection *a, asection *b)
2937 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2939 CORE_ADDR a_start = a->vma;
2940 CORE_ADDR a_end = a->vma + bfd_get_section_size (a);
2941 CORE_ADDR b_start = b->vma;
2942 CORE_ADDR b_end = b->vma + bfd_get_section_size (b);
2944 return (a_start < b_end && b_start < a_end);
2947 /* Function: overlay_unmapped_address (PC, SECTION)
2948 Returns the address corresponding to PC in the unmapped (load) range.
2949 May be the same as PC. */
2952 overlay_unmapped_address (CORE_ADDR pc, asection *section)
2954 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2956 if (overlay_debugging)
2957 if (section && section_is_overlay (section) &&
2958 pc_in_mapped_range (pc, section))
2959 return pc + section->lma - section->vma;
2964 /* Function: overlay_mapped_address (PC, SECTION)
2965 Returns the address corresponding to PC in the mapped (runtime) range.
2966 May be the same as PC. */
2969 overlay_mapped_address (CORE_ADDR pc, asection *section)
2971 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2973 if (overlay_debugging)
2974 if (section && section_is_overlay (section) &&
2975 pc_in_unmapped_range (pc, section))
2976 return pc + section->vma - section->lma;
2982 /* Function: symbol_overlayed_address
2983 Return one of two addresses (relative to the VMA or to the LMA),
2984 depending on whether the section is mapped or not. */
2987 symbol_overlayed_address (CORE_ADDR address, asection *section)
2989 if (overlay_debugging)
2991 /* If the symbol has no section, just return its regular address. */
2994 /* If the symbol's section is not an overlay, just return its address */
2995 if (!section_is_overlay (section))
2997 /* If the symbol's section is mapped, just return its address */
2998 if (section_is_mapped (section))
3001 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3002 * then return its LOADED address rather than its vma address!!
3004 return overlay_unmapped_address (address, section);
3009 /* Function: find_pc_overlay (PC)
3010 Return the best-match overlay section for PC:
3011 If PC matches a mapped overlay section's VMA, return that section.
3012 Else if PC matches an unmapped section's VMA, return that section.
3013 Else if PC matches an unmapped section's LMA, return that section. */
3016 find_pc_overlay (CORE_ADDR pc)
3018 struct objfile *objfile;
3019 struct obj_section *osect, *best_match = NULL;
3021 if (overlay_debugging)
3022 ALL_OBJSECTIONS (objfile, osect)
3023 if (section_is_overlay (osect->the_bfd_section))
3025 if (pc_in_mapped_range (pc, osect->the_bfd_section))
3027 if (overlay_is_mapped (osect))
3028 return osect->the_bfd_section;
3032 else if (pc_in_unmapped_range (pc, osect->the_bfd_section))
3035 return best_match ? best_match->the_bfd_section : NULL;
3038 /* Function: find_pc_mapped_section (PC)
3039 If PC falls into the VMA address range of an overlay section that is
3040 currently marked as MAPPED, return that section. Else return NULL. */
3043 find_pc_mapped_section (CORE_ADDR pc)
3045 struct objfile *objfile;
3046 struct obj_section *osect;
3048 if (overlay_debugging)
3049 ALL_OBJSECTIONS (objfile, osect)
3050 if (pc_in_mapped_range (pc, osect->the_bfd_section) &&
3051 overlay_is_mapped (osect))
3052 return osect->the_bfd_section;
3057 /* Function: list_overlays_command
3058 Print a list of mapped sections and their PC ranges */
3061 list_overlays_command (char *args, int from_tty)
3064 struct objfile *objfile;
3065 struct obj_section *osect;
3067 if (overlay_debugging)
3068 ALL_OBJSECTIONS (objfile, osect)
3069 if (overlay_is_mapped (osect))
3075 vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section);
3076 lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section);
3077 size = bfd_get_section_size (osect->the_bfd_section);
3078 name = bfd_section_name (objfile->obfd, osect->the_bfd_section);
3080 printf_filtered ("Section %s, loaded at ", name);
3081 deprecated_print_address_numeric (lma, 1, gdb_stdout);
3082 puts_filtered (" - ");
3083 deprecated_print_address_numeric (lma + size, 1, gdb_stdout);
3084 printf_filtered (", mapped at ");
3085 deprecated_print_address_numeric (vma, 1, gdb_stdout);
3086 puts_filtered (" - ");
3087 deprecated_print_address_numeric (vma + size, 1, gdb_stdout);
3088 puts_filtered ("\n");
3093 printf_filtered (_("No sections are mapped.\n"));
3096 /* Function: map_overlay_command
3097 Mark the named section as mapped (ie. residing at its VMA address). */
3100 map_overlay_command (char *args, int from_tty)
3102 struct objfile *objfile, *objfile2;
3103 struct obj_section *sec, *sec2;
3106 if (!overlay_debugging)
3108 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3109 the 'overlay manual' command."));
3111 if (args == 0 || *args == 0)
3112 error (_("Argument required: name of an overlay section"));
3114 /* First, find a section matching the user supplied argument */
3115 ALL_OBJSECTIONS (objfile, sec)
3116 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
3118 /* Now, check to see if the section is an overlay. */
3119 bfdsec = sec->the_bfd_section;
3120 if (!section_is_overlay (bfdsec))
3121 continue; /* not an overlay section */
3123 /* Mark the overlay as "mapped" */
3124 sec->ovly_mapped = 1;
3126 /* Next, make a pass and unmap any sections that are
3127 overlapped by this new section: */
3128 ALL_OBJSECTIONS (objfile2, sec2)
3129 if (sec2->ovly_mapped
3131 && sec->the_bfd_section != sec2->the_bfd_section
3132 && sections_overlap (sec->the_bfd_section,
3133 sec2->the_bfd_section))
3136 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3137 bfd_section_name (objfile->obfd,
3138 sec2->the_bfd_section));
3139 sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2 */
3143 error (_("No overlay section called %s"), args);
3146 /* Function: unmap_overlay_command
3147 Mark the overlay section as unmapped
3148 (ie. resident in its LMA address range, rather than the VMA range). */
3151 unmap_overlay_command (char *args, int from_tty)
3153 struct objfile *objfile;
3154 struct obj_section *sec;
3156 if (!overlay_debugging)
3158 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3159 the 'overlay manual' command."));
3161 if (args == 0 || *args == 0)
3162 error (_("Argument required: name of an overlay section"));
3164 /* First, find a section matching the user supplied argument */
3165 ALL_OBJSECTIONS (objfile, sec)
3166 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
3168 if (!sec->ovly_mapped)
3169 error (_("Section %s is not mapped"), args);
3170 sec->ovly_mapped = 0;
3173 error (_("No overlay section called %s"), args);
3176 /* Function: overlay_auto_command
3177 A utility command to turn on overlay debugging.
3178 Possibly this should be done via a set/show command. */
3181 overlay_auto_command (char *args, int from_tty)
3183 overlay_debugging = ovly_auto;
3184 enable_overlay_breakpoints ();
3186 printf_unfiltered (_("Automatic overlay debugging enabled."));
3189 /* Function: overlay_manual_command
3190 A utility command to turn on overlay debugging.
3191 Possibly this should be done via a set/show command. */
3194 overlay_manual_command (char *args, int from_tty)
3196 overlay_debugging = ovly_on;
3197 disable_overlay_breakpoints ();
3199 printf_unfiltered (_("Overlay debugging enabled."));
3202 /* Function: overlay_off_command
3203 A utility command to turn on overlay debugging.
3204 Possibly this should be done via a set/show command. */
3207 overlay_off_command (char *args, int from_tty)
3209 overlay_debugging = ovly_off;
3210 disable_overlay_breakpoints ();
3212 printf_unfiltered (_("Overlay debugging disabled."));
3216 overlay_load_command (char *args, int from_tty)
3218 if (target_overlay_update)
3219 (*target_overlay_update) (NULL);
3221 error (_("This target does not know how to read its overlay state."));
3224 /* Function: overlay_command
3225 A place-holder for a mis-typed command */
3227 /* Command list chain containing all defined "overlay" subcommands. */
3228 struct cmd_list_element *overlaylist;
3231 overlay_command (char *args, int from_tty)
3234 ("\"overlay\" must be followed by the name of an overlay command.\n");
3235 help_list (overlaylist, "overlay ", -1, gdb_stdout);
3239 /* Target Overlays for the "Simplest" overlay manager:
3241 This is GDB's default target overlay layer. It works with the
3242 minimal overlay manager supplied as an example by Cygnus. The
3243 entry point is via a function pointer "target_overlay_update",
3244 so targets that use a different runtime overlay manager can
3245 substitute their own overlay_update function and take over the
3248 The overlay_update function pokes around in the target's data structures
3249 to see what overlays are mapped, and updates GDB's overlay mapping with
3252 In this simple implementation, the target data structures are as follows:
3253 unsigned _novlys; /# number of overlay sections #/
3254 unsigned _ovly_table[_novlys][4] = {
3255 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3256 {..., ..., ..., ...},
3258 unsigned _novly_regions; /# number of overlay regions #/
3259 unsigned _ovly_region_table[_novly_regions][3] = {
3260 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3263 These functions will attempt to update GDB's mappedness state in the
3264 symbol section table, based on the target's mappedness state.
3266 To do this, we keep a cached copy of the target's _ovly_table, and
3267 attempt to detect when the cached copy is invalidated. The main
3268 entry point is "simple_overlay_update(SECT), which looks up SECT in
3269 the cached table and re-reads only the entry for that section from
3270 the target (whenever possible).
3273 /* Cached, dynamically allocated copies of the target data structures: */
3274 static unsigned (*cache_ovly_table)[4] = 0;
3276 static unsigned (*cache_ovly_region_table)[3] = 0;
3278 static unsigned cache_novlys = 0;
3280 static unsigned cache_novly_regions = 0;
3282 static CORE_ADDR cache_ovly_table_base = 0;
3284 static CORE_ADDR cache_ovly_region_table_base = 0;
3288 VMA, SIZE, LMA, MAPPED
3290 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
3292 /* Throw away the cached copy of _ovly_table */
3294 simple_free_overlay_table (void)
3296 if (cache_ovly_table)
3297 xfree (cache_ovly_table);
3299 cache_ovly_table = NULL;
3300 cache_ovly_table_base = 0;
3304 /* Throw away the cached copy of _ovly_region_table */
3306 simple_free_overlay_region_table (void)
3308 if (cache_ovly_region_table)
3309 xfree (cache_ovly_region_table);
3310 cache_novly_regions = 0;
3311 cache_ovly_region_table = NULL;
3312 cache_ovly_region_table_base = 0;
3316 /* Read an array of ints from the target into a local buffer.
3317 Convert to host order. int LEN is number of ints */
3319 read_target_long_array (CORE_ADDR memaddr, unsigned int *myaddr, int len)
3321 /* FIXME (alloca): Not safe if array is very large. */
3322 char *buf = alloca (len * TARGET_LONG_BYTES);
3325 read_memory (memaddr, buf, len * TARGET_LONG_BYTES);
3326 for (i = 0; i < len; i++)
3327 myaddr[i] = extract_unsigned_integer (TARGET_LONG_BYTES * i + buf,
3331 /* Find and grab a copy of the target _ovly_table
3332 (and _novlys, which is needed for the table's size) */
3334 simple_read_overlay_table (void)
3336 struct minimal_symbol *novlys_msym, *ovly_table_msym;
3338 simple_free_overlay_table ();
3339 novlys_msym = lookup_minimal_symbol ("_novlys", NULL, NULL);
3342 error (_("Error reading inferior's overlay table: "
3343 "couldn't find `_novlys' variable\n"
3344 "in inferior. Use `overlay manual' mode."));
3348 ovly_table_msym = lookup_minimal_symbol ("_ovly_table", NULL, NULL);
3349 if (! ovly_table_msym)
3351 error (_("Error reading inferior's overlay table: couldn't find "
3352 "`_ovly_table' array\n"
3353 "in inferior. Use `overlay manual' mode."));
3357 cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym), 4);
3359 = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table));
3360 cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (ovly_table_msym);
3361 read_target_long_array (cache_ovly_table_base,
3362 (int *) cache_ovly_table,
3365 return 1; /* SUCCESS */
3369 /* Find and grab a copy of the target _ovly_region_table
3370 (and _novly_regions, which is needed for the table's size) */
3372 simple_read_overlay_region_table (void)
3374 struct minimal_symbol *msym;
3376 simple_free_overlay_region_table ();
3377 msym = lookup_minimal_symbol ("_novly_regions", NULL, NULL);
3379 cache_novly_regions = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4);
3381 return 0; /* failure */
3382 cache_ovly_region_table = (void *) xmalloc (cache_novly_regions * 12);
3383 if (cache_ovly_region_table != NULL)
3385 msym = lookup_minimal_symbol ("_ovly_region_table", NULL, NULL);
3388 cache_ovly_region_table_base = SYMBOL_VALUE_ADDRESS (msym);
3389 read_target_long_array (cache_ovly_region_table_base,
3390 (int *) cache_ovly_region_table,
3391 cache_novly_regions * 3);
3394 return 0; /* failure */
3397 return 0; /* failure */
3398 return 1; /* SUCCESS */
3402 /* Function: simple_overlay_update_1
3403 A helper function for simple_overlay_update. Assuming a cached copy
3404 of _ovly_table exists, look through it to find an entry whose vma,
3405 lma and size match those of OSECT. Re-read the entry and make sure
3406 it still matches OSECT (else the table may no longer be valid).
3407 Set OSECT's mapped state to match the entry. Return: 1 for
3408 success, 0 for failure. */
3411 simple_overlay_update_1 (struct obj_section *osect)
3414 bfd *obfd = osect->objfile->obfd;
3415 asection *bsect = osect->the_bfd_section;
3417 size = bfd_get_section_size (osect->the_bfd_section);
3418 for (i = 0; i < cache_novlys; i++)
3419 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3420 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3421 /* && cache_ovly_table[i][SIZE] == size */ )
3423 read_target_long_array (cache_ovly_table_base + i * TARGET_LONG_BYTES,
3424 (int *) cache_ovly_table[i], 4);
3425 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3426 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3427 /* && cache_ovly_table[i][SIZE] == size */ )
3429 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3432 else /* Warning! Warning! Target's ovly table has changed! */
3438 /* Function: simple_overlay_update
3439 If OSECT is NULL, then update all sections' mapped state
3440 (after re-reading the entire target _ovly_table).
3441 If OSECT is non-NULL, then try to find a matching entry in the
3442 cached ovly_table and update only OSECT's mapped state.
3443 If a cached entry can't be found or the cache isn't valid, then
3444 re-read the entire cache, and go ahead and update all sections. */
3447 simple_overlay_update (struct obj_section *osect)
3449 struct objfile *objfile;
3451 /* Were we given an osect to look up? NULL means do all of them. */
3453 /* Have we got a cached copy of the target's overlay table? */
3454 if (cache_ovly_table != NULL)
3455 /* Does its cached location match what's currently in the symtab? */
3456 if (cache_ovly_table_base ==
3457 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL, NULL)))
3458 /* Then go ahead and try to look up this single section in the cache */
3459 if (simple_overlay_update_1 (osect))
3460 /* Found it! We're done. */
3463 /* Cached table no good: need to read the entire table anew.
3464 Or else we want all the sections, in which case it's actually
3465 more efficient to read the whole table in one block anyway. */
3467 if (! simple_read_overlay_table ())
3470 /* Now may as well update all sections, even if only one was requested. */
3471 ALL_OBJSECTIONS (objfile, osect)
3472 if (section_is_overlay (osect->the_bfd_section))
3475 bfd *obfd = osect->objfile->obfd;
3476 asection *bsect = osect->the_bfd_section;
3478 size = bfd_get_section_size (bsect);
3479 for (i = 0; i < cache_novlys; i++)
3480 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3481 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3482 /* && cache_ovly_table[i][SIZE] == size */ )
3483 { /* obj_section matches i'th entry in ovly_table */
3484 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3485 break; /* finished with inner for loop: break out */
3490 /* Set the output sections and output offsets for section SECTP in
3491 ABFD. The relocation code in BFD will read these offsets, so we
3492 need to be sure they're initialized. We map each section to itself,
3493 with no offset; this means that SECTP->vma will be honored. */
3496 symfile_dummy_outputs (bfd *abfd, asection *sectp, void *dummy)
3498 sectp->output_section = sectp;
3499 sectp->output_offset = 0;
3502 /* Relocate the contents of a debug section SECTP in ABFD. The
3503 contents are stored in BUF if it is non-NULL, or returned in a
3504 malloc'd buffer otherwise.
3506 For some platforms and debug info formats, shared libraries contain
3507 relocations against the debug sections (particularly for DWARF-2;
3508 one affected platform is PowerPC GNU/Linux, although it depends on
3509 the version of the linker in use). Also, ELF object files naturally
3510 have unresolved relocations for their debug sections. We need to apply
3511 the relocations in order to get the locations of symbols correct. */
3514 symfile_relocate_debug_section (bfd *abfd, asection *sectp, bfd_byte *buf)
3516 /* We're only interested in debugging sections with relocation
3518 if ((sectp->flags & SEC_RELOC) == 0)
3520 if ((sectp->flags & SEC_DEBUGGING) == 0)
3523 /* We will handle section offsets properly elsewhere, so relocate as if
3524 all sections begin at 0. */
3525 bfd_map_over_sections (abfd, symfile_dummy_outputs, NULL);
3527 return bfd_simple_get_relocated_section_contents (abfd, sectp, buf, NULL);
3531 _initialize_symfile (void)
3533 struct cmd_list_element *c;
3535 c = add_cmd ("symbol-file", class_files, symbol_file_command, _("\
3536 Load symbol table from executable file FILE.\n\
3537 The `file' command can also load symbol tables, as well as setting the file\n\
3538 to execute."), &cmdlist);
3539 set_cmd_completer (c, filename_completer);
3541 c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command, _("\
3542 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3543 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3544 ADDR is the starting address of the file's text.\n\
3545 The optional arguments are section-name section-address pairs and\n\
3546 should be specified if the data and bss segments are not contiguous\n\
3547 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3549 set_cmd_completer (c, filename_completer);
3551 c = add_cmd ("add-shared-symbol-files", class_files,
3552 add_shared_symbol_files_command, _("\
3553 Load the symbols from shared objects in the dynamic linker's link map."),
3555 c = add_alias_cmd ("assf", "add-shared-symbol-files", class_files, 1,
3558 c = add_cmd ("load", class_files, load_command, _("\
3559 Dynamically load FILE into the running program, and record its symbols\n\
3560 for access from GDB."), &cmdlist);
3561 set_cmd_completer (c, filename_completer);
3563 add_setshow_boolean_cmd ("symbol-reloading", class_support,
3564 &symbol_reloading, _("\
3565 Set dynamic symbol table reloading multiple times in one run."), _("\
3566 Show dynamic symbol table reloading multiple times in one run."), NULL,
3568 NULL, /* FIXME: i18n: */
3569 &setlist, &showlist);
3571 add_prefix_cmd ("overlay", class_support, overlay_command,
3572 _("Commands for debugging overlays."), &overlaylist,
3573 "overlay ", 0, &cmdlist);
3575 add_com_alias ("ovly", "overlay", class_alias, 1);
3576 add_com_alias ("ov", "overlay", class_alias, 1);
3578 add_cmd ("map-overlay", class_support, map_overlay_command,
3579 _("Assert that an overlay section is mapped."), &overlaylist);
3581 add_cmd ("unmap-overlay", class_support, unmap_overlay_command,
3582 _("Assert that an overlay section is unmapped."), &overlaylist);
3584 add_cmd ("list-overlays", class_support, list_overlays_command,
3585 _("List mappings of overlay sections."), &overlaylist);
3587 add_cmd ("manual", class_support, overlay_manual_command,
3588 _("Enable overlay debugging."), &overlaylist);
3589 add_cmd ("off", class_support, overlay_off_command,
3590 _("Disable overlay debugging."), &overlaylist);
3591 add_cmd ("auto", class_support, overlay_auto_command,
3592 _("Enable automatic overlay debugging."), &overlaylist);
3593 add_cmd ("load-target", class_support, overlay_load_command,
3594 _("Read the overlay mapping state from the target."), &overlaylist);
3596 /* Filename extension to source language lookup table: */
3597 init_filename_language_table ();
3598 add_setshow_string_noescape_cmd ("extension-language", class_files,
3600 Set mapping between filename extension and source language."), _("\
3601 Show mapping between filename extension and source language."), _("\
3602 Usage: set extension-language .foo bar"),
3603 set_ext_lang_command,
3604 NULL, /* FIXME: i18n: */
3605 &setlist, &showlist);
3607 add_info ("extensions", info_ext_lang_command,
3608 _("All filename extensions associated with a source language."));
3610 add_setshow_integer_cmd ("download-write-size", class_obscure,
3611 &download_write_size, _("\
3612 Set the write size used when downloading a program."), _("\
3613 Show the write size used when downloading a program."), _("\
3614 Only used when downloading a program onto a remote\n\
3615 target. Specify zero, or a negative value, to disable\n\
3616 blocked writes. The actual size of each transfer is also\n\
3617 limited by the size of the target packet and the memory\n\
3620 NULL, /* FIXME: i18n: */
3621 &setlist, &showlist);
3623 debug_file_directory = xstrdup (DEBUGDIR);
3625 ("debug-file-directory", class_support, var_string,
3626 (char *) &debug_file_directory,
3627 "Set the directory where separate debug symbols are searched for.\n"
3628 "Separate debug symbols are first searched for in the same\n"
3629 "directory as the binary, then in the `" DEBUG_SUBDIRECTORY
3631 "and lastly at the path of the directory of the binary with\n"
3632 "the global debug-file directory prepended\n",
3634 deprecated_add_show_from_set (c, &showlist);
3635 set_cmd_completer (c, filename_completer);