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 set_ext_lang_command (char *args, int from_tty);
143 static void info_ext_lang_command (char *args, int from_tty);
145 static char *find_separate_debug_file (struct objfile *objfile);
147 static void init_filename_language_table (void);
149 void _initialize_symfile (void);
151 /* List of all available sym_fns. On gdb startup, each object file reader
152 calls add_symtab_fns() to register information on each format it is
155 static struct sym_fns *symtab_fns = NULL;
157 /* Flag for whether user will be reloading symbols multiple times.
158 Defaults to ON for VxWorks, otherwise OFF. */
160 #ifdef SYMBOL_RELOADING_DEFAULT
161 int symbol_reloading = SYMBOL_RELOADING_DEFAULT;
163 int symbol_reloading = 0;
166 /* If non-zero, shared library symbols will be added automatically
167 when the inferior is created, new libraries are loaded, or when
168 attaching to the inferior. This is almost always what users will
169 want to have happen; but for very large programs, the startup time
170 will be excessive, and so if this is a problem, the user can clear
171 this flag and then add the shared library symbols as needed. Note
172 that there is a potential for confusion, since if the shared
173 library symbols are not loaded, commands like "info fun" will *not*
174 report all the functions that are actually present. */
176 int auto_solib_add = 1;
178 /* For systems that support it, a threshold size in megabytes. If
179 automatically adding a new library's symbol table to those already
180 known to the debugger would cause the total shared library symbol
181 size to exceed this threshhold, then the shlib's symbols are not
182 added. The threshold is ignored if the user explicitly asks for a
183 shlib to be added, such as when using the "sharedlibrary"
186 int auto_solib_limit;
189 /* This compares two partial symbols by names, using strcmp_iw_ordered
190 for the comparison. */
193 compare_psymbols (const void *s1p, const void *s2p)
195 struct partial_symbol *const *s1 = s1p;
196 struct partial_symbol *const *s2 = s2p;
198 return strcmp_iw_ordered (SYMBOL_SEARCH_NAME (*s1),
199 SYMBOL_SEARCH_NAME (*s2));
203 sort_pst_symbols (struct partial_symtab *pst)
205 /* Sort the global list; don't sort the static list */
207 qsort (pst->objfile->global_psymbols.list + pst->globals_offset,
208 pst->n_global_syms, sizeof (struct partial_symbol *),
212 /* Make a null terminated copy of the string at PTR with SIZE characters in
213 the obstack pointed to by OBSTACKP . Returns the address of the copy.
214 Note that the string at PTR does not have to be null terminated, I.E. it
215 may be part of a larger string and we are only saving a substring. */
218 obsavestring (const char *ptr, int size, struct obstack *obstackp)
220 char *p = (char *) obstack_alloc (obstackp, size + 1);
221 /* Open-coded memcpy--saves function call time. These strings are usually
222 short. FIXME: Is this really still true with a compiler that can
225 const char *p1 = ptr;
227 const char *end = ptr + size;
235 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
236 in the obstack pointed to by OBSTACKP. */
239 obconcat (struct obstack *obstackp, const char *s1, const char *s2,
242 int len = strlen (s1) + strlen (s2) + strlen (s3) + 1;
243 char *val = (char *) obstack_alloc (obstackp, len);
250 /* True if we are nested inside psymtab_to_symtab. */
252 int currently_reading_symtab = 0;
255 decrement_reading_symtab (void *dummy)
257 currently_reading_symtab--;
260 /* Get the symbol table that corresponds to a partial_symtab.
261 This is fast after the first time you do it. In fact, there
262 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
266 psymtab_to_symtab (struct partial_symtab *pst)
268 /* If it's been looked up before, return it. */
272 /* If it has not yet been read in, read it. */
275 struct cleanup *back_to = make_cleanup (decrement_reading_symtab, NULL);
276 currently_reading_symtab++;
277 (*pst->read_symtab) (pst);
278 do_cleanups (back_to);
284 /* Remember the lowest-addressed loadable section we've seen.
285 This function is called via bfd_map_over_sections.
287 In case of equal vmas, the section with the largest size becomes the
288 lowest-addressed loadable section.
290 If the vmas and sizes are equal, the last section is considered the
291 lowest-addressed loadable section. */
294 find_lowest_section (bfd *abfd, asection *sect, void *obj)
296 asection **lowest = (asection **) obj;
298 if (0 == (bfd_get_section_flags (abfd, sect) & SEC_LOAD))
301 *lowest = sect; /* First loadable section */
302 else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect))
303 *lowest = sect; /* A lower loadable section */
304 else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect)
305 && (bfd_section_size (abfd, (*lowest))
306 <= bfd_section_size (abfd, sect)))
310 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
312 struct section_addr_info *
313 alloc_section_addr_info (size_t num_sections)
315 struct section_addr_info *sap;
318 size = (sizeof (struct section_addr_info)
319 + sizeof (struct other_sections) * (num_sections - 1));
320 sap = (struct section_addr_info *) xmalloc (size);
321 memset (sap, 0, size);
322 sap->num_sections = num_sections;
327 /* Build (allocate and populate) a section_addr_info struct from
328 an existing section table. */
330 extern struct section_addr_info *
331 build_section_addr_info_from_section_table (const struct section_table *start,
332 const struct section_table *end)
334 struct section_addr_info *sap;
335 const struct section_table *stp;
338 sap = alloc_section_addr_info (end - start);
340 for (stp = start, oidx = 0; stp != end; stp++)
342 if (bfd_get_section_flags (stp->bfd,
343 stp->the_bfd_section) & (SEC_ALLOC | SEC_LOAD)
344 && oidx < end - start)
346 sap->other[oidx].addr = stp->addr;
347 sap->other[oidx].name
348 = xstrdup (bfd_section_name (stp->bfd, stp->the_bfd_section));
349 sap->other[oidx].sectindex = stp->the_bfd_section->index;
358 /* Free all memory allocated by build_section_addr_info_from_section_table. */
361 free_section_addr_info (struct section_addr_info *sap)
365 for (idx = 0; idx < sap->num_sections; idx++)
366 if (sap->other[idx].name)
367 xfree (sap->other[idx].name);
372 /* Initialize OBJFILE's sect_index_* members. */
374 init_objfile_sect_indices (struct objfile *objfile)
379 sect = bfd_get_section_by_name (objfile->obfd, ".text");
381 objfile->sect_index_text = sect->index;
383 sect = bfd_get_section_by_name (objfile->obfd, ".data");
385 objfile->sect_index_data = sect->index;
387 sect = bfd_get_section_by_name (objfile->obfd, ".bss");
389 objfile->sect_index_bss = sect->index;
391 sect = bfd_get_section_by_name (objfile->obfd, ".rodata");
393 objfile->sect_index_rodata = sect->index;
395 /* This is where things get really weird... We MUST have valid
396 indices for the various sect_index_* members or gdb will abort.
397 So if for example, there is no ".text" section, we have to
398 accomodate that. Except when explicitly adding symbol files at
399 some address, section_offsets contains nothing but zeros, so it
400 doesn't matter which slot in section_offsets the individual
401 sect_index_* members index into. So if they are all zero, it is
402 safe to just point all the currently uninitialized indices to the
405 for (i = 0; i < objfile->num_sections; i++)
407 if (ANOFFSET (objfile->section_offsets, i) != 0)
412 if (i == objfile->num_sections)
414 if (objfile->sect_index_text == -1)
415 objfile->sect_index_text = 0;
416 if (objfile->sect_index_data == -1)
417 objfile->sect_index_data = 0;
418 if (objfile->sect_index_bss == -1)
419 objfile->sect_index_bss = 0;
420 if (objfile->sect_index_rodata == -1)
421 objfile->sect_index_rodata = 0;
426 /* Parse the user's idea of an offset for dynamic linking, into our idea
427 of how to represent it for fast symbol reading. This is the default
428 version of the sym_fns.sym_offsets function for symbol readers that
429 don't need to do anything special. It allocates a section_offsets table
430 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
433 default_symfile_offsets (struct objfile *objfile,
434 struct section_addr_info *addrs)
438 objfile->num_sections = bfd_count_sections (objfile->obfd);
439 objfile->section_offsets = (struct section_offsets *)
440 obstack_alloc (&objfile->objfile_obstack,
441 SIZEOF_N_SECTION_OFFSETS (objfile->num_sections));
442 memset (objfile->section_offsets, 0,
443 SIZEOF_N_SECTION_OFFSETS (objfile->num_sections));
445 /* Now calculate offsets for section that were specified by the
447 for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++)
449 struct other_sections *osp ;
451 osp = &addrs->other[i] ;
455 /* Record all sections in offsets */
456 /* The section_offsets in the objfile are here filled in using
458 (objfile->section_offsets)->offsets[osp->sectindex] = osp->addr;
461 /* Remember the bfd indexes for the .text, .data, .bss and
463 init_objfile_sect_indices (objfile);
467 /* Process a symbol file, as either the main file or as a dynamically
470 OBJFILE is where the symbols are to be read from.
472 ADDRS is the list of section load addresses. If the user has given
473 an 'add-symbol-file' command, then this is the list of offsets and
474 addresses he or she provided as arguments to the command; or, if
475 we're handling a shared library, these are the actual addresses the
476 sections are loaded at, according to the inferior's dynamic linker
477 (as gleaned by GDB's shared library code). We convert each address
478 into an offset from the section VMA's as it appears in the object
479 file, and then call the file's sym_offsets function to convert this
480 into a format-specific offset table --- a `struct section_offsets'.
481 If ADDRS is non-zero, OFFSETS must be zero.
483 OFFSETS is a table of section offsets already in the right
484 format-specific representation. NUM_OFFSETS is the number of
485 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
486 assume this is the proper table the call to sym_offsets described
487 above would produce. Instead of calling sym_offsets, we just dump
488 it right into objfile->section_offsets. (When we're re-reading
489 symbols from an objfile, we don't have the original load address
490 list any more; all we have is the section offset table.) If
491 OFFSETS is non-zero, ADDRS must be zero.
493 MAINLINE is nonzero if this is the main symbol file, or zero if
494 it's an extra symbol file such as dynamically loaded code.
496 VERBO is nonzero if the caller has printed a verbose message about
497 the symbol reading (and complaints can be more terse about it). */
500 syms_from_objfile (struct objfile *objfile,
501 struct section_addr_info *addrs,
502 struct section_offsets *offsets,
507 struct section_addr_info *local_addr = NULL;
508 struct cleanup *old_chain;
510 gdb_assert (! (addrs && offsets));
512 init_entry_point_info (objfile);
513 find_sym_fns (objfile);
515 if (objfile->sf == NULL)
516 return; /* No symbols. */
518 /* Make sure that partially constructed symbol tables will be cleaned up
519 if an error occurs during symbol reading. */
520 old_chain = make_cleanup_free_objfile (objfile);
522 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
523 list. We now establish the convention that an addr of zero means
524 no load address was specified. */
525 if (! addrs && ! offsets)
528 = alloc_section_addr_info (bfd_count_sections (objfile->obfd));
529 make_cleanup (xfree, local_addr);
533 /* Now either addrs or offsets is non-zero. */
537 /* We will modify the main symbol table, make sure that all its users
538 will be cleaned up if an error occurs during symbol reading. */
539 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
541 /* Since no error yet, throw away the old symbol table. */
543 if (symfile_objfile != NULL)
545 free_objfile (symfile_objfile);
546 symfile_objfile = NULL;
549 /* Currently we keep symbols from the add-symbol-file command.
550 If the user wants to get rid of them, they should do "symbol-file"
551 without arguments first. Not sure this is the best behavior
554 (*objfile->sf->sym_new_init) (objfile);
557 /* Convert addr into an offset rather than an absolute address.
558 We find the lowest address of a loaded segment in the objfile,
559 and assume that <addr> is where that got loaded.
561 We no longer warn if the lowest section is not a text segment (as
562 happens for the PA64 port. */
563 if (!mainline && addrs && addrs->other[0].name)
565 asection *lower_sect;
567 CORE_ADDR lower_offset;
570 /* Find lowest loadable section to be used as starting point for
571 continguous sections. FIXME!! won't work without call to find
572 .text first, but this assumes text is lowest section. */
573 lower_sect = bfd_get_section_by_name (objfile->obfd, ".text");
574 if (lower_sect == NULL)
575 bfd_map_over_sections (objfile->obfd, find_lowest_section,
577 if (lower_sect == NULL)
578 warning ("no loadable sections found in added symbol-file %s",
581 if ((bfd_get_section_flags (objfile->obfd, lower_sect) & SEC_CODE) == 0)
582 warning ("Lowest section in %s is %s at %s",
584 bfd_section_name (objfile->obfd, lower_sect),
585 paddr (bfd_section_vma (objfile->obfd, lower_sect)));
586 if (lower_sect != NULL)
587 lower_offset = bfd_section_vma (objfile->obfd, lower_sect);
591 /* Calculate offsets for the loadable sections.
592 FIXME! Sections must be in order of increasing loadable section
593 so that contiguous sections can use the lower-offset!!!
595 Adjust offsets if the segments are not contiguous.
596 If the section is contiguous, its offset should be set to
597 the offset of the highest loadable section lower than it
598 (the loadable section directly below it in memory).
599 this_offset = lower_offset = lower_addr - lower_orig_addr */
601 for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++)
603 if (addrs->other[i].addr != 0)
605 sect = bfd_get_section_by_name (objfile->obfd,
606 addrs->other[i].name);
610 -= bfd_section_vma (objfile->obfd, sect);
611 lower_offset = addrs->other[i].addr;
612 /* This is the index used by BFD. */
613 addrs->other[i].sectindex = sect->index ;
617 warning ("section %s not found in %s",
618 addrs->other[i].name,
620 addrs->other[i].addr = 0;
624 addrs->other[i].addr = lower_offset;
628 /* Initialize symbol reading routines for this objfile, allow complaints to
629 appear for this new file, and record how verbose to be, then do the
630 initial symbol reading for this file. */
632 (*objfile->sf->sym_init) (objfile);
633 clear_complaints (&symfile_complaints, 1, verbo);
636 (*objfile->sf->sym_offsets) (objfile, addrs);
639 size_t size = SIZEOF_N_SECTION_OFFSETS (num_offsets);
641 /* Just copy in the offset table directly as given to us. */
642 objfile->num_sections = num_offsets;
643 objfile->section_offsets
644 = ((struct section_offsets *)
645 obstack_alloc (&objfile->objfile_obstack, size));
646 memcpy (objfile->section_offsets, offsets, size);
648 init_objfile_sect_indices (objfile);
651 #ifndef DEPRECATED_IBM6000_TARGET
652 /* This is a SVR4/SunOS specific hack, I think. In any event, it
653 screws RS/6000. sym_offsets should be doing this sort of thing,
654 because it knows the mapping between bfd sections and
656 /* This is a hack. As far as I can tell, section offsets are not
657 target dependent. They are all set to addr with a couple of
658 exceptions. The exceptions are sysvr4 shared libraries, whose
659 offsets are kept in solib structures anyway and rs6000 xcoff
660 which handles shared libraries in a completely unique way.
662 Section offsets are built similarly, except that they are built
663 by adding addr in all cases because there is no clear mapping
664 from section_offsets into actual sections. Note that solib.c
665 has a different algorithm for finding section offsets.
667 These should probably all be collapsed into some target
668 independent form of shared library support. FIXME. */
672 struct obj_section *s;
674 /* Map section offsets in "addr" back to the object's
675 sections by comparing the section names with bfd's
676 section names. Then adjust the section address by
677 the offset. */ /* for gdb/13815 */
679 ALL_OBJFILE_OSECTIONS (objfile, s)
681 CORE_ADDR s_addr = 0;
685 !s_addr && i < addrs->num_sections && addrs->other[i].name;
687 if (strcmp (bfd_section_name (s->objfile->obfd,
689 addrs->other[i].name) == 0)
690 s_addr = addrs->other[i].addr; /* end added for gdb/13815 */
692 s->addr -= s->offset;
694 s->endaddr -= s->offset;
695 s->endaddr += s_addr;
699 #endif /* not DEPRECATED_IBM6000_TARGET */
701 (*objfile->sf->sym_read) (objfile, mainline);
703 /* Don't allow char * to have a typename (else would get caddr_t).
704 Ditto void *. FIXME: Check whether this is now done by all the
705 symbol readers themselves (many of them now do), and if so remove
708 TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0;
709 TYPE_NAME (lookup_pointer_type (builtin_type_void)) = 0;
711 /* Mark the objfile has having had initial symbol read attempted. Note
712 that this does not mean we found any symbols... */
714 objfile->flags |= OBJF_SYMS;
716 /* Discard cleanups as symbol reading was successful. */
718 discard_cleanups (old_chain);
721 /* Perform required actions after either reading in the initial
722 symbols for a new objfile, or mapping in the symbols from a reusable
726 new_symfile_objfile (struct objfile *objfile, int mainline, int verbo)
729 /* If this is the main symbol file we have to clean up all users of the
730 old main symbol file. Otherwise it is sufficient to fixup all the
731 breakpoints that may have been redefined by this symbol file. */
734 /* OK, make it the "real" symbol file. */
735 symfile_objfile = objfile;
737 clear_symtab_users ();
741 breakpoint_re_set ();
744 /* We're done reading the symbol file; finish off complaints. */
745 clear_complaints (&symfile_complaints, 0, verbo);
748 /* Process a symbol file, as either the main file or as a dynamically
751 ABFD is a BFD already open on the file, as from symfile_bfd_open.
752 This BFD will be closed on error, and is always consumed by this function.
754 FROM_TTY says how verbose to be.
756 MAINLINE specifies whether this is the main symbol file, or whether
757 it's an extra symbol file such as dynamically loaded code.
759 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
760 syms_from_objfile, above. ADDRS is ignored when MAINLINE is
763 Upon success, returns a pointer to the objfile that was added.
764 Upon failure, jumps back to command level (never returns). */
765 static struct objfile *
766 symbol_file_add_with_addrs_or_offsets (bfd *abfd, int from_tty,
767 struct section_addr_info *addrs,
768 struct section_offsets *offsets,
770 int mainline, int flags)
772 struct objfile *objfile;
773 struct partial_symtab *psymtab;
775 struct section_addr_info *orig_addrs;
776 struct cleanup *my_cleanups;
777 const char *name = bfd_get_filename (abfd);
779 my_cleanups = make_cleanup_bfd_close (abfd);
781 /* Give user a chance to burp if we'd be
782 interactively wiping out any existing symbols. */
784 if ((have_full_symbols () || have_partial_symbols ())
787 && !query ("Load new symbol table from \"%s\"? ", name))
788 error ("Not confirmed.");
790 objfile = allocate_objfile (abfd, flags);
791 discard_cleanups (my_cleanups);
793 orig_addrs = alloc_section_addr_info (bfd_count_sections (abfd));
794 my_cleanups = make_cleanup (xfree, orig_addrs);
798 orig_addrs->num_sections = addrs->num_sections;
799 for (i = 0; i < addrs->num_sections; i++)
800 orig_addrs->other[i] = addrs->other[i];
803 /* We either created a new mapped symbol table, mapped an existing
804 symbol table file which has not had initial symbol reading
805 performed, or need to read an unmapped symbol table. */
806 if (from_tty || info_verbose)
808 if (deprecated_pre_add_symbol_hook)
809 deprecated_pre_add_symbol_hook (name);
812 printf_unfiltered ("Reading symbols from %s...", name);
814 gdb_flush (gdb_stdout);
817 syms_from_objfile (objfile, addrs, offsets, num_offsets,
820 /* We now have at least a partial symbol table. Check to see if the
821 user requested that all symbols be read on initial access via either
822 the gdb startup command line or on a per symbol file basis. Expand
823 all partial symbol tables for this objfile if so. */
825 if ((flags & OBJF_READNOW) || readnow_symbol_files)
827 if (from_tty || info_verbose)
829 printf_unfiltered ("expanding to full symbols...");
831 gdb_flush (gdb_stdout);
834 for (psymtab = objfile->psymtabs;
836 psymtab = psymtab->next)
838 psymtab_to_symtab (psymtab);
842 debugfile = find_separate_debug_file (objfile);
847 objfile->separate_debug_objfile
848 = symbol_file_add (debugfile, from_tty, orig_addrs, 0, flags);
852 objfile->separate_debug_objfile
853 = symbol_file_add (debugfile, from_tty, NULL, 0, flags);
855 objfile->separate_debug_objfile->separate_debug_objfile_backlink
858 /* Put the separate debug object before the normal one, this is so that
859 usage of the ALL_OBJFILES_SAFE macro will stay safe. */
860 put_objfile_before (objfile->separate_debug_objfile, objfile);
865 if (!have_partial_symbols () && !have_full_symbols ())
868 printf_unfiltered ("(no debugging symbols found)...");
872 if (from_tty || info_verbose)
874 if (deprecated_post_add_symbol_hook)
875 deprecated_post_add_symbol_hook ();
878 printf_unfiltered ("done.\n");
882 /* We print some messages regardless of whether 'from_tty ||
883 info_verbose' is true, so make sure they go out at the right
885 gdb_flush (gdb_stdout);
887 do_cleanups (my_cleanups);
889 if (objfile->sf == NULL)
890 return objfile; /* No symbols. */
892 new_symfile_objfile (objfile, mainline, from_tty);
894 if (deprecated_target_new_objfile_hook)
895 deprecated_target_new_objfile_hook (objfile);
897 bfd_cache_close_all ();
902 /* Process the symbol file ABFD, as either the main file or as a
903 dynamically loaded file.
905 See symbol_file_add_with_addrs_or_offsets's comments for
908 symbol_file_add_from_bfd (bfd *abfd, int from_tty,
909 struct section_addr_info *addrs,
910 int mainline, int flags)
912 return symbol_file_add_with_addrs_or_offsets (abfd,
913 from_tty, addrs, 0, 0,
918 /* Process a symbol file, as either the main file or as a dynamically
919 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
922 symbol_file_add (char *name, int from_tty, struct section_addr_info *addrs,
923 int mainline, int flags)
925 return symbol_file_add_from_bfd (symfile_bfd_open (name), from_tty,
926 addrs, mainline, flags);
930 /* Call symbol_file_add() with default values and update whatever is
931 affected by the loading of a new main().
932 Used when the file is supplied in the gdb command line
933 and by some targets with special loading requirements.
934 The auxiliary function, symbol_file_add_main_1(), has the flags
935 argument for the switches that can only be specified in the symbol_file
939 symbol_file_add_main (char *args, int from_tty)
941 symbol_file_add_main_1 (args, from_tty, 0);
945 symbol_file_add_main_1 (char *args, int from_tty, int flags)
947 symbol_file_add (args, from_tty, NULL, 1, flags);
949 /* Getting new symbols may change our opinion about
950 what is frameless. */
951 reinit_frame_cache ();
953 set_initial_language ();
957 symbol_file_clear (int from_tty)
959 if ((have_full_symbols () || have_partial_symbols ())
961 && !query ("Discard symbol table from `%s'? ",
962 symfile_objfile->name))
963 error ("Not confirmed.");
964 free_all_objfiles ();
966 /* solib descriptors may have handles to objfiles. Since their
967 storage has just been released, we'd better wipe the solib
970 #if defined(SOLIB_RESTART)
974 symfile_objfile = NULL;
976 printf_unfiltered ("No symbol file now.\n");
980 get_debug_link_info (struct objfile *objfile, unsigned long *crc32_out)
983 bfd_size_type debuglink_size;
989 sect = bfd_get_section_by_name (objfile->obfd, ".gnu_debuglink");
994 debuglink_size = bfd_section_size (objfile->obfd, sect);
996 contents = xmalloc (debuglink_size);
997 bfd_get_section_contents (objfile->obfd, sect, contents,
998 (file_ptr)0, (bfd_size_type)debuglink_size);
1000 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1001 crc_offset = strlen (contents) + 1;
1002 crc_offset = (crc_offset + 3) & ~3;
1004 crc32 = bfd_get_32 (objfile->obfd, (bfd_byte *) (contents + crc_offset));
1011 separate_debug_file_exists (const char *name, unsigned long crc)
1013 unsigned long file_crc = 0;
1015 char buffer[8*1024];
1018 fd = open (name, O_RDONLY | O_BINARY);
1022 while ((count = read (fd, buffer, sizeof (buffer))) > 0)
1023 file_crc = gnu_debuglink_crc32 (file_crc, buffer, count);
1027 return crc == file_crc;
1030 static char *debug_file_directory = NULL;
1032 #if ! defined (DEBUG_SUBDIRECTORY)
1033 #define DEBUG_SUBDIRECTORY ".debug"
1037 find_separate_debug_file (struct objfile *objfile)
1044 bfd_size_type debuglink_size;
1045 unsigned long crc32;
1048 basename = get_debug_link_info (objfile, &crc32);
1050 if (basename == NULL)
1053 dir = xstrdup (objfile->name);
1055 /* Strip off the final filename part, leaving the directory name,
1056 followed by a slash. Objfile names should always be absolute and
1057 tilde-expanded, so there should always be a slash in there
1059 for (i = strlen(dir) - 1; i >= 0; i--)
1061 if (IS_DIR_SEPARATOR (dir[i]))
1064 gdb_assert (i >= 0 && IS_DIR_SEPARATOR (dir[i]));
1067 debugfile = alloca (strlen (debug_file_directory) + 1
1069 + strlen (DEBUG_SUBDIRECTORY)
1074 /* First try in the same directory as the original file. */
1075 strcpy (debugfile, dir);
1076 strcat (debugfile, basename);
1078 if (separate_debug_file_exists (debugfile, crc32))
1082 return xstrdup (debugfile);
1085 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1086 strcpy (debugfile, dir);
1087 strcat (debugfile, DEBUG_SUBDIRECTORY);
1088 strcat (debugfile, "/");
1089 strcat (debugfile, basename);
1091 if (separate_debug_file_exists (debugfile, crc32))
1095 return xstrdup (debugfile);
1098 /* Then try in the global debugfile directory. */
1099 strcpy (debugfile, debug_file_directory);
1100 strcat (debugfile, "/");
1101 strcat (debugfile, dir);
1102 strcat (debugfile, basename);
1104 if (separate_debug_file_exists (debugfile, crc32))
1108 return xstrdup (debugfile);
1117 /* This is the symbol-file command. Read the file, analyze its
1118 symbols, and add a struct symtab to a symtab list. The syntax of
1119 the command is rather bizarre--(1) buildargv implements various
1120 quoting conventions which are undocumented and have little or
1121 nothing in common with the way things are quoted (or not quoted)
1122 elsewhere in GDB, (2) options are used, which are not generally
1123 used in GDB (perhaps "set mapped on", "set readnow on" would be
1124 better), (3) the order of options matters, which is contrary to GNU
1125 conventions (because it is confusing and inconvenient). */
1126 /* Note: ezannoni 2000-04-17. This function used to have support for
1127 rombug (see remote-os9k.c). It consisted of a call to target_link()
1128 (target.c) to get the address of the text segment from the target,
1129 and pass that to symbol_file_add(). This is no longer supported. */
1132 symbol_file_command (char *args, int from_tty)
1136 struct cleanup *cleanups;
1137 int flags = OBJF_USERLOADED;
1143 symbol_file_clear (from_tty);
1147 if ((argv = buildargv (args)) == NULL)
1151 cleanups = make_cleanup_freeargv (argv);
1152 while (*argv != NULL)
1154 if (strcmp (*argv, "-readnow") == 0)
1155 flags |= OBJF_READNOW;
1156 else if (**argv == '-')
1157 error ("unknown option `%s'", *argv);
1162 symbol_file_add_main_1 (name, from_tty, flags);
1169 error ("no symbol file name was specified");
1171 do_cleanups (cleanups);
1175 /* Set the initial language.
1177 A better solution would be to record the language in the psymtab when reading
1178 partial symbols, and then use it (if known) to set the language. This would
1179 be a win for formats that encode the language in an easily discoverable place,
1180 such as DWARF. For stabs, we can jump through hoops looking for specially
1181 named symbols or try to intuit the language from the specific type of stabs
1182 we find, but we can't do that until later when we read in full symbols.
1186 set_initial_language (void)
1188 struct partial_symtab *pst;
1189 enum language lang = language_unknown;
1191 pst = find_main_psymtab ();
1194 if (pst->filename != NULL)
1196 lang = deduce_language_from_filename (pst->filename);
1198 if (lang == language_unknown)
1200 /* Make C the default language */
1203 set_language (lang);
1204 expected_language = current_language; /* Don't warn the user */
1208 /* Open file specified by NAME and hand it off to BFD for preliminary
1209 analysis. Result is a newly initialized bfd *, which includes a newly
1210 malloc'd` copy of NAME (tilde-expanded and made absolute).
1211 In case of trouble, error() is called. */
1214 symfile_bfd_open (char *name)
1218 char *absolute_name;
1222 name = tilde_expand (name); /* Returns 1st new malloc'd copy */
1224 /* Look down path for it, allocate 2nd new malloc'd copy. */
1225 desc = openp (getenv ("PATH"), 1, name, O_RDONLY | O_BINARY, 0, &absolute_name);
1226 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1229 char *exename = alloca (strlen (name) + 5);
1230 strcat (strcpy (exename, name), ".exe");
1231 desc = openp (getenv ("PATH"), 1, exename, O_RDONLY | O_BINARY,
1237 make_cleanup (xfree, name);
1238 perror_with_name (name);
1240 xfree (name); /* Free 1st new malloc'd copy */
1241 name = absolute_name; /* Keep 2nd malloc'd copy in bfd */
1242 /* It'll be freed in free_objfile(). */
1244 sym_bfd = bfd_fdopenr (name, gnutarget, desc);
1248 make_cleanup (xfree, name);
1249 error ("\"%s\": can't open to read symbols: %s.", name,
1250 bfd_errmsg (bfd_get_error ()));
1252 bfd_set_cacheable (sym_bfd, 1);
1254 if (!bfd_check_format (sym_bfd, bfd_object))
1256 /* FIXME: should be checking for errors from bfd_close (for one thing,
1257 on error it does not free all the storage associated with the
1259 bfd_close (sym_bfd); /* This also closes desc */
1260 make_cleanup (xfree, name);
1261 error ("\"%s\": can't read symbols: %s.", name,
1262 bfd_errmsg (bfd_get_error ()));
1267 /* Return the section index for the given section name. Return -1 if
1268 the section was not found. */
1270 get_section_index (struct objfile *objfile, char *section_name)
1272 asection *sect = bfd_get_section_by_name (objfile->obfd, section_name);
1279 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1280 startup by the _initialize routine in each object file format reader,
1281 to register information about each format the the reader is prepared
1285 add_symtab_fns (struct sym_fns *sf)
1287 sf->next = symtab_fns;
1292 /* Initialize to read symbols from the symbol file sym_bfd. It either
1293 returns or calls error(). The result is an initialized struct sym_fns
1294 in the objfile structure, that contains cached information about the
1298 find_sym_fns (struct objfile *objfile)
1301 enum bfd_flavour our_flavour = bfd_get_flavour (objfile->obfd);
1302 char *our_target = bfd_get_target (objfile->obfd);
1304 if (our_flavour == bfd_target_srec_flavour
1305 || our_flavour == bfd_target_ihex_flavour
1306 || our_flavour == bfd_target_tekhex_flavour)
1307 return; /* No symbols. */
1309 for (sf = symtab_fns; sf != NULL; sf = sf->next)
1311 if (our_flavour == sf->sym_flavour)
1317 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
1318 bfd_get_target (objfile->obfd));
1321 /* This function runs the load command of our current target. */
1324 load_command (char *arg, int from_tty)
1327 arg = get_exec_file (1);
1328 target_load (arg, from_tty);
1330 /* After re-loading the executable, we don't really know which
1331 overlays are mapped any more. */
1332 overlay_cache_invalid = 1;
1335 /* This version of "load" should be usable for any target. Currently
1336 it is just used for remote targets, not inftarg.c or core files,
1337 on the theory that only in that case is it useful.
1339 Avoiding xmodem and the like seems like a win (a) because we don't have
1340 to worry about finding it, and (b) On VMS, fork() is very slow and so
1341 we don't want to run a subprocess. On the other hand, I'm not sure how
1342 performance compares. */
1344 static int download_write_size = 512;
1345 static int validate_download = 0;
1347 /* Callback service function for generic_load (bfd_map_over_sections). */
1350 add_section_size_callback (bfd *abfd, asection *asec, void *data)
1352 bfd_size_type *sum = data;
1354 *sum += bfd_get_section_size (asec);
1357 /* Opaque data for load_section_callback. */
1358 struct load_section_data {
1359 unsigned long load_offset;
1360 unsigned long write_count;
1361 unsigned long data_count;
1362 bfd_size_type total_size;
1365 /* Callback service function for generic_load (bfd_map_over_sections). */
1368 load_section_callback (bfd *abfd, asection *asec, void *data)
1370 struct load_section_data *args = data;
1372 if (bfd_get_section_flags (abfd, asec) & SEC_LOAD)
1374 bfd_size_type size = bfd_get_section_size (asec);
1378 struct cleanup *old_chain;
1379 CORE_ADDR lma = bfd_section_lma (abfd, asec) + args->load_offset;
1380 bfd_size_type block_size;
1382 const char *sect_name = bfd_get_section_name (abfd, asec);
1385 if (download_write_size > 0 && size > download_write_size)
1386 block_size = download_write_size;
1390 buffer = xmalloc (size);
1391 old_chain = make_cleanup (xfree, buffer);
1393 /* Is this really necessary? I guess it gives the user something
1394 to look at during a long download. */
1395 ui_out_message (uiout, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1396 sect_name, paddr_nz (size), paddr_nz (lma));
1398 bfd_get_section_contents (abfd, asec, buffer, 0, size);
1404 bfd_size_type this_transfer = size - sent;
1406 if (this_transfer >= block_size)
1407 this_transfer = block_size;
1408 len = target_write_memory_partial (lma, buffer,
1409 this_transfer, &err);
1412 if (validate_download)
1414 /* Broken memories and broken monitors manifest
1415 themselves here when bring new computers to
1416 life. This doubles already slow downloads. */
1417 /* NOTE: cagney/1999-10-18: A more efficient
1418 implementation might add a verify_memory()
1419 method to the target vector and then use
1420 that. remote.c could implement that method
1421 using the ``qCRC'' packet. */
1422 char *check = xmalloc (len);
1423 struct cleanup *verify_cleanups =
1424 make_cleanup (xfree, check);
1426 if (target_read_memory (lma, check, len) != 0)
1427 error ("Download verify read failed at 0x%s",
1429 if (memcmp (buffer, check, len) != 0)
1430 error ("Download verify compare failed at 0x%s",
1432 do_cleanups (verify_cleanups);
1434 args->data_count += len;
1437 args->write_count += 1;
1440 || (deprecated_ui_load_progress_hook != NULL
1441 && deprecated_ui_load_progress_hook (sect_name, sent)))
1442 error ("Canceled the download");
1444 if (deprecated_show_load_progress != NULL)
1445 deprecated_show_load_progress (sect_name, sent, size,
1449 while (sent < size);
1452 error ("Memory access error while loading section %s.", sect_name);
1454 do_cleanups (old_chain);
1460 generic_load (char *args, int from_tty)
1464 time_t start_time, end_time; /* Start and end times of download */
1466 struct cleanup *old_cleanups;
1468 struct load_section_data cbdata;
1471 cbdata.load_offset = 0; /* Offset to add to vma for each section. */
1472 cbdata.write_count = 0; /* Number of writes needed. */
1473 cbdata.data_count = 0; /* Number of bytes written to target memory. */
1474 cbdata.total_size = 0; /* Total size of all bfd sectors. */
1476 /* Parse the input argument - the user can specify a load offset as
1477 a second argument. */
1478 filename = xmalloc (strlen (args) + 1);
1479 old_cleanups = make_cleanup (xfree, filename);
1480 strcpy (filename, args);
1481 offptr = strchr (filename, ' ');
1486 cbdata.load_offset = strtoul (offptr, &endptr, 0);
1487 if (offptr == endptr)
1488 error ("Invalid download offset:%s\n", offptr);
1492 cbdata.load_offset = 0;
1494 /* Open the file for loading. */
1495 loadfile_bfd = bfd_openr (filename, gnutarget);
1496 if (loadfile_bfd == NULL)
1498 perror_with_name (filename);
1502 /* FIXME: should be checking for errors from bfd_close (for one thing,
1503 on error it does not free all the storage associated with the
1505 make_cleanup_bfd_close (loadfile_bfd);
1507 if (!bfd_check_format (loadfile_bfd, bfd_object))
1509 error ("\"%s\" is not an object file: %s", filename,
1510 bfd_errmsg (bfd_get_error ()));
1513 bfd_map_over_sections (loadfile_bfd, add_section_size_callback,
1514 (void *) &cbdata.total_size);
1516 start_time = time (NULL);
1518 bfd_map_over_sections (loadfile_bfd, load_section_callback, &cbdata);
1520 end_time = time (NULL);
1522 entry = bfd_get_start_address (loadfile_bfd);
1523 ui_out_text (uiout, "Start address ");
1524 ui_out_field_fmt (uiout, "address", "0x%s", paddr_nz (entry));
1525 ui_out_text (uiout, ", load size ");
1526 ui_out_field_fmt (uiout, "load-size", "%lu", cbdata.data_count);
1527 ui_out_text (uiout, "\n");
1528 /* We were doing this in remote-mips.c, I suspect it is right
1529 for other targets too. */
1532 /* FIXME: are we supposed to call symbol_file_add or not? According
1533 to a comment from remote-mips.c (where a call to symbol_file_add
1534 was commented out), making the call confuses GDB if more than one
1535 file is loaded in. Some targets do (e.g., remote-vx.c) but
1536 others don't (or didn't - perhaps they have all been deleted). */
1538 print_transfer_performance (gdb_stdout, cbdata.data_count,
1539 cbdata.write_count, end_time - start_time);
1541 do_cleanups (old_cleanups);
1544 /* Report how fast the transfer went. */
1546 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1547 replaced by print_transfer_performance (with a very different
1548 function signature). */
1551 report_transfer_performance (unsigned long data_count, time_t start_time,
1554 print_transfer_performance (gdb_stdout, data_count,
1555 end_time - start_time, 0);
1559 print_transfer_performance (struct ui_file *stream,
1560 unsigned long data_count,
1561 unsigned long write_count,
1562 unsigned long time_count)
1564 ui_out_text (uiout, "Transfer rate: ");
1567 ui_out_field_fmt (uiout, "transfer-rate", "%lu",
1568 (data_count * 8) / time_count);
1569 ui_out_text (uiout, " bits/sec");
1573 ui_out_field_fmt (uiout, "transferred-bits", "%lu", (data_count * 8));
1574 ui_out_text (uiout, " bits in <1 sec");
1576 if (write_count > 0)
1578 ui_out_text (uiout, ", ");
1579 ui_out_field_fmt (uiout, "write-rate", "%lu", data_count / write_count);
1580 ui_out_text (uiout, " bytes/write");
1582 ui_out_text (uiout, ".\n");
1585 /* This function allows the addition of incrementally linked object files.
1586 It does not modify any state in the target, only in the debugger. */
1587 /* Note: ezannoni 2000-04-13 This function/command used to have a
1588 special case syntax for the rombug target (Rombug is the boot
1589 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
1590 rombug case, the user doesn't need to supply a text address,
1591 instead a call to target_link() (in target.c) would supply the
1592 value to use. We are now discontinuing this type of ad hoc syntax. */
1595 add_symbol_file_command (char *args, int from_tty)
1597 char *filename = NULL;
1598 int flags = OBJF_USERLOADED;
1600 int expecting_option = 0;
1601 int section_index = 0;
1605 int expecting_sec_name = 0;
1606 int expecting_sec_addr = 0;
1614 struct section_addr_info *section_addrs;
1615 struct sect_opt *sect_opts = NULL;
1616 size_t num_sect_opts = 0;
1617 struct cleanup *my_cleanups = make_cleanup (null_cleanup, NULL);
1620 sect_opts = (struct sect_opt *) xmalloc (num_sect_opts
1621 * sizeof (struct sect_opt));
1626 error ("add-symbol-file takes a file name and an address");
1628 /* Make a copy of the string that we can safely write into. */
1629 args = xstrdup (args);
1631 while (*args != '\000')
1633 /* Any leading spaces? */
1634 while (isspace (*args))
1637 /* Point arg to the beginning of the argument. */
1640 /* Move args pointer over the argument. */
1641 while ((*args != '\000') && !isspace (*args))
1644 /* If there are more arguments, terminate arg and
1646 if (*args != '\000')
1649 /* Now process the argument. */
1652 /* The first argument is the file name. */
1653 filename = tilde_expand (arg);
1654 make_cleanup (xfree, filename);
1659 /* The second argument is always the text address at which
1660 to load the program. */
1661 sect_opts[section_index].name = ".text";
1662 sect_opts[section_index].value = arg;
1663 if (++section_index > num_sect_opts)
1666 sect_opts = ((struct sect_opt *)
1667 xrealloc (sect_opts,
1669 * sizeof (struct sect_opt)));
1674 /* It's an option (starting with '-') or it's an argument
1679 if (strcmp (arg, "-readnow") == 0)
1680 flags |= OBJF_READNOW;
1681 else if (strcmp (arg, "-s") == 0)
1683 expecting_sec_name = 1;
1684 expecting_sec_addr = 1;
1689 if (expecting_sec_name)
1691 sect_opts[section_index].name = arg;
1692 expecting_sec_name = 0;
1695 if (expecting_sec_addr)
1697 sect_opts[section_index].value = arg;
1698 expecting_sec_addr = 0;
1699 if (++section_index > num_sect_opts)
1702 sect_opts = ((struct sect_opt *)
1703 xrealloc (sect_opts,
1705 * sizeof (struct sect_opt)));
1709 error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*");
1715 /* Print the prompt for the query below. And save the arguments into
1716 a sect_addr_info structure to be passed around to other
1717 functions. We have to split this up into separate print
1718 statements because local_hex_string returns a local static
1721 printf_unfiltered ("add symbol table from file \"%s\" at\n", filename);
1722 section_addrs = alloc_section_addr_info (section_index);
1723 make_cleanup (xfree, section_addrs);
1724 for (i = 0; i < section_index; i++)
1727 char *val = sect_opts[i].value;
1728 char *sec = sect_opts[i].name;
1730 addr = parse_and_eval_address (val);
1732 /* Here we store the section offsets in the order they were
1733 entered on the command line. */
1734 section_addrs->other[sec_num].name = sec;
1735 section_addrs->other[sec_num].addr = addr;
1736 printf_unfiltered ("\t%s_addr = %s\n",
1738 local_hex_string ((unsigned long)addr));
1741 /* The object's sections are initialized when a
1742 call is made to build_objfile_section_table (objfile).
1743 This happens in reread_symbols.
1744 At this point, we don't know what file type this is,
1745 so we can't determine what section names are valid. */
1748 if (from_tty && (!query ("%s", "")))
1749 error ("Not confirmed.");
1751 symbol_file_add (filename, from_tty, section_addrs, 0, flags);
1753 /* Getting new symbols may change our opinion about what is
1755 reinit_frame_cache ();
1756 do_cleanups (my_cleanups);
1760 add_shared_symbol_files_command (char *args, int from_tty)
1762 #ifdef ADD_SHARED_SYMBOL_FILES
1763 ADD_SHARED_SYMBOL_FILES (args, from_tty);
1765 error ("This command is not available in this configuration of GDB.");
1769 /* Re-read symbols if a symbol-file has changed. */
1771 reread_symbols (void)
1773 struct objfile *objfile;
1776 struct stat new_statbuf;
1779 /* With the addition of shared libraries, this should be modified,
1780 the load time should be saved in the partial symbol tables, since
1781 different tables may come from different source files. FIXME.
1782 This routine should then walk down each partial symbol table
1783 and see if the symbol table that it originates from has been changed */
1785 for (objfile = object_files; objfile; objfile = objfile->next)
1789 #ifdef DEPRECATED_IBM6000_TARGET
1790 /* If this object is from a shared library, then you should
1791 stat on the library name, not member name. */
1793 if (objfile->obfd->my_archive)
1794 res = stat (objfile->obfd->my_archive->filename, &new_statbuf);
1797 res = stat (objfile->name, &new_statbuf);
1800 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1801 printf_unfiltered ("`%s' has disappeared; keeping its symbols.\n",
1805 new_modtime = new_statbuf.st_mtime;
1806 if (new_modtime != objfile->mtime)
1808 struct cleanup *old_cleanups;
1809 struct section_offsets *offsets;
1811 char *obfd_filename;
1813 printf_unfiltered ("`%s' has changed; re-reading symbols.\n",
1816 /* There are various functions like symbol_file_add,
1817 symfile_bfd_open, syms_from_objfile, etc., which might
1818 appear to do what we want. But they have various other
1819 effects which we *don't* want. So we just do stuff
1820 ourselves. We don't worry about mapped files (for one thing,
1821 any mapped file will be out of date). */
1823 /* If we get an error, blow away this objfile (not sure if
1824 that is the correct response for things like shared
1826 old_cleanups = make_cleanup_free_objfile (objfile);
1827 /* We need to do this whenever any symbols go away. */
1828 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
1830 /* Clean up any state BFD has sitting around. We don't need
1831 to close the descriptor but BFD lacks a way of closing the
1832 BFD without closing the descriptor. */
1833 obfd_filename = bfd_get_filename (objfile->obfd);
1834 if (!bfd_close (objfile->obfd))
1835 error ("Can't close BFD for %s: %s", objfile->name,
1836 bfd_errmsg (bfd_get_error ()));
1837 objfile->obfd = bfd_openr (obfd_filename, gnutarget);
1838 if (objfile->obfd == NULL)
1839 error ("Can't open %s to read symbols.", objfile->name);
1840 /* bfd_openr sets cacheable to true, which is what we want. */
1841 if (!bfd_check_format (objfile->obfd, bfd_object))
1842 error ("Can't read symbols from %s: %s.", objfile->name,
1843 bfd_errmsg (bfd_get_error ()));
1845 /* Save the offsets, we will nuke them with the rest of the
1847 num_offsets = objfile->num_sections;
1848 offsets = ((struct section_offsets *)
1849 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets)));
1850 memcpy (offsets, objfile->section_offsets,
1851 SIZEOF_N_SECTION_OFFSETS (num_offsets));
1853 /* Nuke all the state that we will re-read. Much of the following
1854 code which sets things to NULL really is necessary to tell
1855 other parts of GDB that there is nothing currently there. */
1857 /* FIXME: Do we have to free a whole linked list, or is this
1859 if (objfile->global_psymbols.list)
1860 xmfree (objfile->md, objfile->global_psymbols.list);
1861 memset (&objfile->global_psymbols, 0,
1862 sizeof (objfile->global_psymbols));
1863 if (objfile->static_psymbols.list)
1864 xmfree (objfile->md, objfile->static_psymbols.list);
1865 memset (&objfile->static_psymbols, 0,
1866 sizeof (objfile->static_psymbols));
1868 /* Free the obstacks for non-reusable objfiles */
1869 bcache_xfree (objfile->psymbol_cache);
1870 objfile->psymbol_cache = bcache_xmalloc ();
1871 bcache_xfree (objfile->macro_cache);
1872 objfile->macro_cache = bcache_xmalloc ();
1873 if (objfile->demangled_names_hash != NULL)
1875 htab_delete (objfile->demangled_names_hash);
1876 objfile->demangled_names_hash = NULL;
1878 obstack_free (&objfile->objfile_obstack, 0);
1879 objfile->sections = NULL;
1880 objfile->symtabs = NULL;
1881 objfile->psymtabs = NULL;
1882 objfile->free_psymtabs = NULL;
1883 objfile->cp_namespace_symtab = NULL;
1884 objfile->msymbols = NULL;
1885 objfile->sym_private = NULL;
1886 objfile->minimal_symbol_count = 0;
1887 memset (&objfile->msymbol_hash, 0,
1888 sizeof (objfile->msymbol_hash));
1889 memset (&objfile->msymbol_demangled_hash, 0,
1890 sizeof (objfile->msymbol_demangled_hash));
1891 objfile->fundamental_types = NULL;
1892 clear_objfile_data (objfile);
1893 if (objfile->sf != NULL)
1895 (*objfile->sf->sym_finish) (objfile);
1898 /* We never make this a mapped file. */
1900 objfile->psymbol_cache = bcache_xmalloc ();
1901 objfile->macro_cache = bcache_xmalloc ();
1902 /* obstack_init also initializes the obstack so it is
1903 empty. We could use obstack_specify_allocation but
1904 gdb_obstack.h specifies the alloc/dealloc
1906 obstack_init (&objfile->objfile_obstack);
1907 if (build_objfile_section_table (objfile))
1909 error ("Can't find the file sections in `%s': %s",
1910 objfile->name, bfd_errmsg (bfd_get_error ()));
1912 terminate_minimal_symbol_table (objfile);
1914 /* We use the same section offsets as from last time. I'm not
1915 sure whether that is always correct for shared libraries. */
1916 objfile->section_offsets = (struct section_offsets *)
1917 obstack_alloc (&objfile->objfile_obstack,
1918 SIZEOF_N_SECTION_OFFSETS (num_offsets));
1919 memcpy (objfile->section_offsets, offsets,
1920 SIZEOF_N_SECTION_OFFSETS (num_offsets));
1921 objfile->num_sections = num_offsets;
1923 /* What the hell is sym_new_init for, anyway? The concept of
1924 distinguishing between the main file and additional files
1925 in this way seems rather dubious. */
1926 if (objfile == symfile_objfile)
1928 (*objfile->sf->sym_new_init) (objfile);
1931 (*objfile->sf->sym_init) (objfile);
1932 clear_complaints (&symfile_complaints, 1, 1);
1933 /* The "mainline" parameter is a hideous hack; I think leaving it
1934 zero is OK since dbxread.c also does what it needs to do if
1935 objfile->global_psymbols.size is 0. */
1936 (*objfile->sf->sym_read) (objfile, 0);
1937 if (!have_partial_symbols () && !have_full_symbols ())
1940 printf_unfiltered ("(no debugging symbols found)\n");
1943 objfile->flags |= OBJF_SYMS;
1945 /* We're done reading the symbol file; finish off complaints. */
1946 clear_complaints (&symfile_complaints, 0, 1);
1948 /* Getting new symbols may change our opinion about what is
1951 reinit_frame_cache ();
1953 /* Discard cleanups as symbol reading was successful. */
1954 discard_cleanups (old_cleanups);
1956 /* If the mtime has changed between the time we set new_modtime
1957 and now, we *want* this to be out of date, so don't call stat
1959 objfile->mtime = new_modtime;
1961 reread_separate_symbols (objfile);
1967 clear_symtab_users ();
1971 /* Handle separate debug info for OBJFILE, which has just been
1973 - If we had separate debug info before, but now we don't, get rid
1974 of the separated objfile.
1975 - If we didn't have separated debug info before, but now we do,
1976 read in the new separated debug info file.
1977 - If the debug link points to a different file, toss the old one
1978 and read the new one.
1979 This function does *not* handle the case where objfile is still
1980 using the same separate debug info file, but that file's timestamp
1981 has changed. That case should be handled by the loop in
1982 reread_symbols already. */
1984 reread_separate_symbols (struct objfile *objfile)
1987 unsigned long crc32;
1989 /* Does the updated objfile's debug info live in a
1991 debug_file = find_separate_debug_file (objfile);
1993 if (objfile->separate_debug_objfile)
1995 /* There are two cases where we need to get rid of
1996 the old separated debug info objfile:
1997 - if the new primary objfile doesn't have
1998 separated debug info, or
1999 - if the new primary objfile has separate debug
2000 info, but it's under a different filename.
2002 If the old and new objfiles both have separate
2003 debug info, under the same filename, then we're
2004 okay --- if the separated file's contents have
2005 changed, we will have caught that when we
2006 visited it in this function's outermost
2009 || strcmp (debug_file, objfile->separate_debug_objfile->name) != 0)
2010 free_objfile (objfile->separate_debug_objfile);
2013 /* If the new objfile has separate debug info, and we
2014 haven't loaded it already, do so now. */
2016 && ! objfile->separate_debug_objfile)
2018 /* Use the same section offset table as objfile itself.
2019 Preserve the flags from objfile that make sense. */
2020 objfile->separate_debug_objfile
2021 = (symbol_file_add_with_addrs_or_offsets
2022 (symfile_bfd_open (debug_file),
2023 info_verbose, /* from_tty: Don't override the default. */
2024 0, /* No addr table. */
2025 objfile->section_offsets, objfile->num_sections,
2026 0, /* Not mainline. See comments about this above. */
2027 objfile->flags & (OBJF_REORDERED | OBJF_SHARED | OBJF_READNOW
2028 | OBJF_USERLOADED)));
2029 objfile->separate_debug_objfile->separate_debug_objfile_backlink
2045 static filename_language *filename_language_table;
2046 static int fl_table_size, fl_table_next;
2049 add_filename_language (char *ext, enum language lang)
2051 if (fl_table_next >= fl_table_size)
2053 fl_table_size += 10;
2054 filename_language_table =
2055 xrealloc (filename_language_table,
2056 fl_table_size * sizeof (*filename_language_table));
2059 filename_language_table[fl_table_next].ext = xstrdup (ext);
2060 filename_language_table[fl_table_next].lang = lang;
2064 static char *ext_args;
2067 set_ext_lang_command (char *args, int from_tty)
2070 char *cp = ext_args;
2073 /* First arg is filename extension, starting with '.' */
2075 error ("'%s': Filename extension must begin with '.'", ext_args);
2077 /* Find end of first arg. */
2078 while (*cp && !isspace (*cp))
2082 error ("'%s': two arguments required -- filename extension and language",
2085 /* Null-terminate first arg */
2088 /* Find beginning of second arg, which should be a source language. */
2089 while (*cp && isspace (*cp))
2093 error ("'%s': two arguments required -- filename extension and language",
2096 /* Lookup the language from among those we know. */
2097 lang = language_enum (cp);
2099 /* Now lookup the filename extension: do we already know it? */
2100 for (i = 0; i < fl_table_next; i++)
2101 if (0 == strcmp (ext_args, filename_language_table[i].ext))
2104 if (i >= fl_table_next)
2106 /* new file extension */
2107 add_filename_language (ext_args, lang);
2111 /* redefining a previously known filename extension */
2114 /* query ("Really make files of type %s '%s'?", */
2115 /* ext_args, language_str (lang)); */
2117 xfree (filename_language_table[i].ext);
2118 filename_language_table[i].ext = xstrdup (ext_args);
2119 filename_language_table[i].lang = lang;
2124 info_ext_lang_command (char *args, int from_tty)
2128 printf_filtered ("Filename extensions and the languages they represent:");
2129 printf_filtered ("\n\n");
2130 for (i = 0; i < fl_table_next; i++)
2131 printf_filtered ("\t%s\t- %s\n",
2132 filename_language_table[i].ext,
2133 language_str (filename_language_table[i].lang));
2137 init_filename_language_table (void)
2139 if (fl_table_size == 0) /* protect against repetition */
2143 filename_language_table =
2144 xmalloc (fl_table_size * sizeof (*filename_language_table));
2145 add_filename_language (".c", language_c);
2146 add_filename_language (".C", language_cplus);
2147 add_filename_language (".cc", language_cplus);
2148 add_filename_language (".cp", language_cplus);
2149 add_filename_language (".cpp", language_cplus);
2150 add_filename_language (".cxx", language_cplus);
2151 add_filename_language (".c++", language_cplus);
2152 add_filename_language (".java", language_java);
2153 add_filename_language (".class", language_java);
2154 add_filename_language (".m", language_objc);
2155 add_filename_language (".f", language_fortran);
2156 add_filename_language (".F", language_fortran);
2157 add_filename_language (".s", language_asm);
2158 add_filename_language (".S", language_asm);
2159 add_filename_language (".pas", language_pascal);
2160 add_filename_language (".p", language_pascal);
2161 add_filename_language (".pp", language_pascal);
2166 deduce_language_from_filename (char *filename)
2171 if (filename != NULL)
2172 if ((cp = strrchr (filename, '.')) != NULL)
2173 for (i = 0; i < fl_table_next; i++)
2174 if (strcmp (cp, filename_language_table[i].ext) == 0)
2175 return filename_language_table[i].lang;
2177 return language_unknown;
2182 Allocate and partly initialize a new symbol table. Return a pointer
2183 to it. error() if no space.
2185 Caller must set these fields:
2191 possibly free_named_symtabs (symtab->filename);
2195 allocate_symtab (char *filename, struct objfile *objfile)
2197 struct symtab *symtab;
2199 symtab = (struct symtab *)
2200 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symtab));
2201 memset (symtab, 0, sizeof (*symtab));
2202 symtab->filename = obsavestring (filename, strlen (filename),
2203 &objfile->objfile_obstack);
2204 symtab->fullname = NULL;
2205 symtab->language = deduce_language_from_filename (filename);
2206 symtab->debugformat = obsavestring ("unknown", 7,
2207 &objfile->objfile_obstack);
2209 /* Hook it to the objfile it comes from */
2211 symtab->objfile = objfile;
2212 symtab->next = objfile->symtabs;
2213 objfile->symtabs = symtab;
2215 /* FIXME: This should go away. It is only defined for the Z8000,
2216 and the Z8000 definition of this macro doesn't have anything to
2217 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
2218 here for convenience. */
2219 #ifdef INIT_EXTRA_SYMTAB_INFO
2220 INIT_EXTRA_SYMTAB_INFO (symtab);
2226 struct partial_symtab *
2227 allocate_psymtab (char *filename, struct objfile *objfile)
2229 struct partial_symtab *psymtab;
2231 if (objfile->free_psymtabs)
2233 psymtab = objfile->free_psymtabs;
2234 objfile->free_psymtabs = psymtab->next;
2237 psymtab = (struct partial_symtab *)
2238 obstack_alloc (&objfile->objfile_obstack,
2239 sizeof (struct partial_symtab));
2241 memset (psymtab, 0, sizeof (struct partial_symtab));
2242 psymtab->filename = obsavestring (filename, strlen (filename),
2243 &objfile->objfile_obstack);
2244 psymtab->symtab = NULL;
2246 /* Prepend it to the psymtab list for the objfile it belongs to.
2247 Psymtabs are searched in most recent inserted -> least recent
2250 psymtab->objfile = objfile;
2251 psymtab->next = objfile->psymtabs;
2252 objfile->psymtabs = psymtab;
2255 struct partial_symtab **prev_pst;
2256 psymtab->objfile = objfile;
2257 psymtab->next = NULL;
2258 prev_pst = &(objfile->psymtabs);
2259 while ((*prev_pst) != NULL)
2260 prev_pst = &((*prev_pst)->next);
2261 (*prev_pst) = psymtab;
2269 discard_psymtab (struct partial_symtab *pst)
2271 struct partial_symtab **prev_pst;
2274 Empty psymtabs happen as a result of header files which don't
2275 have any symbols in them. There can be a lot of them. But this
2276 check is wrong, in that a psymtab with N_SLINE entries but
2277 nothing else is not empty, but we don't realize that. Fixing
2278 that without slowing things down might be tricky. */
2280 /* First, snip it out of the psymtab chain */
2282 prev_pst = &(pst->objfile->psymtabs);
2283 while ((*prev_pst) != pst)
2284 prev_pst = &((*prev_pst)->next);
2285 (*prev_pst) = pst->next;
2287 /* Next, put it on a free list for recycling */
2289 pst->next = pst->objfile->free_psymtabs;
2290 pst->objfile->free_psymtabs = pst;
2294 /* Reset all data structures in gdb which may contain references to symbol
2298 clear_symtab_users (void)
2300 /* Someday, we should do better than this, by only blowing away
2301 the things that really need to be blown. */
2302 clear_value_history ();
2304 clear_internalvars ();
2305 breakpoint_re_set ();
2306 set_default_breakpoint (0, 0, 0, 0);
2307 clear_current_source_symtab_and_line ();
2308 clear_pc_function_cache ();
2309 if (deprecated_target_new_objfile_hook)
2310 deprecated_target_new_objfile_hook (NULL);
2314 clear_symtab_users_cleanup (void *ignore)
2316 clear_symtab_users ();
2319 /* clear_symtab_users_once:
2321 This function is run after symbol reading, or from a cleanup.
2322 If an old symbol table was obsoleted, the old symbol table
2323 has been blown away, but the other GDB data structures that may
2324 reference it have not yet been cleared or re-directed. (The old
2325 symtab was zapped, and the cleanup queued, in free_named_symtab()
2328 This function can be queued N times as a cleanup, or called
2329 directly; it will do all the work the first time, and then will be a
2330 no-op until the next time it is queued. This works by bumping a
2331 counter at queueing time. Much later when the cleanup is run, or at
2332 the end of symbol processing (in case the cleanup is discarded), if
2333 the queued count is greater than the "done-count", we do the work
2334 and set the done-count to the queued count. If the queued count is
2335 less than or equal to the done-count, we just ignore the call. This
2336 is needed because reading a single .o file will often replace many
2337 symtabs (one per .h file, for example), and we don't want to reset
2338 the breakpoints N times in the user's face.
2340 The reason we both queue a cleanup, and call it directly after symbol
2341 reading, is because the cleanup protects us in case of errors, but is
2342 discarded if symbol reading is successful. */
2345 /* FIXME: As free_named_symtabs is currently a big noop this function
2346 is no longer needed. */
2347 static void clear_symtab_users_once (void);
2349 static int clear_symtab_users_queued;
2350 static int clear_symtab_users_done;
2353 clear_symtab_users_once (void)
2355 /* Enforce once-per-`do_cleanups'-semantics */
2356 if (clear_symtab_users_queued <= clear_symtab_users_done)
2358 clear_symtab_users_done = clear_symtab_users_queued;
2360 clear_symtab_users ();
2364 /* Delete the specified psymtab, and any others that reference it. */
2367 cashier_psymtab (struct partial_symtab *pst)
2369 struct partial_symtab *ps, *pprev = NULL;
2372 /* Find its previous psymtab in the chain */
2373 for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
2382 /* Unhook it from the chain. */
2383 if (ps == pst->objfile->psymtabs)
2384 pst->objfile->psymtabs = ps->next;
2386 pprev->next = ps->next;
2388 /* FIXME, we can't conveniently deallocate the entries in the
2389 partial_symbol lists (global_psymbols/static_psymbols) that
2390 this psymtab points to. These just take up space until all
2391 the psymtabs are reclaimed. Ditto the dependencies list and
2392 filename, which are all in the objfile_obstack. */
2394 /* We need to cashier any psymtab that has this one as a dependency... */
2396 for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
2398 for (i = 0; i < ps->number_of_dependencies; i++)
2400 if (ps->dependencies[i] == pst)
2402 cashier_psymtab (ps);
2403 goto again; /* Must restart, chain has been munged. */
2410 /* If a symtab or psymtab for filename NAME is found, free it along
2411 with any dependent breakpoints, displays, etc.
2412 Used when loading new versions of object modules with the "add-file"
2413 command. This is only called on the top-level symtab or psymtab's name;
2414 it is not called for subsidiary files such as .h files.
2416 Return value is 1 if we blew away the environment, 0 if not.
2417 FIXME. The return value appears to never be used.
2419 FIXME. I think this is not the best way to do this. We should
2420 work on being gentler to the environment while still cleaning up
2421 all stray pointers into the freed symtab. */
2424 free_named_symtabs (char *name)
2427 /* FIXME: With the new method of each objfile having it's own
2428 psymtab list, this function needs serious rethinking. In particular,
2429 why was it ever necessary to toss psymtabs with specific compilation
2430 unit filenames, as opposed to all psymtabs from a particular symbol
2432 Well, the answer is that some systems permit reloading of particular
2433 compilation units. We want to blow away any old info about these
2434 compilation units, regardless of which objfiles they arrived in. --gnu. */
2437 struct symtab *prev;
2438 struct partial_symtab *ps;
2439 struct blockvector *bv;
2442 /* We only wack things if the symbol-reload switch is set. */
2443 if (!symbol_reloading)
2446 /* Some symbol formats have trouble providing file names... */
2447 if (name == 0 || *name == '\0')
2450 /* Look for a psymtab with the specified name. */
2453 for (ps = partial_symtab_list; ps; ps = ps->next)
2455 if (strcmp (name, ps->filename) == 0)
2457 cashier_psymtab (ps); /* Blow it away...and its little dog, too. */
2458 goto again2; /* Must restart, chain has been munged */
2462 /* Look for a symtab with the specified name. */
2464 for (s = symtab_list; s; s = s->next)
2466 if (strcmp (name, s->filename) == 0)
2473 if (s == symtab_list)
2474 symtab_list = s->next;
2476 prev->next = s->next;
2478 /* For now, queue a delete for all breakpoints, displays, etc., whether
2479 or not they depend on the symtab being freed. This should be
2480 changed so that only those data structures affected are deleted. */
2482 /* But don't delete anything if the symtab is empty.
2483 This test is necessary due to a bug in "dbxread.c" that
2484 causes empty symtabs to be created for N_SO symbols that
2485 contain the pathname of the object file. (This problem
2486 has been fixed in GDB 3.9x). */
2488 bv = BLOCKVECTOR (s);
2489 if (BLOCKVECTOR_NBLOCKS (bv) > 2
2490 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK))
2491 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)))
2493 complaint (&symfile_complaints, "Replacing old symbols for `%s'",
2495 clear_symtab_users_queued++;
2496 make_cleanup (clear_symtab_users_once, 0);
2501 complaint (&symfile_complaints, "Empty symbol table found for `%s'",
2509 /* It is still possible that some breakpoints will be affected
2510 even though no symtab was found, since the file might have
2511 been compiled without debugging, and hence not be associated
2512 with a symtab. In order to handle this correctly, we would need
2513 to keep a list of text address ranges for undebuggable files.
2514 For now, we do nothing, since this is a fairly obscure case. */
2518 /* FIXME, what about the minimal symbol table? */
2525 /* Allocate and partially fill a partial symtab. It will be
2526 completely filled at the end of the symbol list.
2528 FILENAME is the name of the symbol-file we are reading from. */
2530 struct partial_symtab *
2531 start_psymtab_common (struct objfile *objfile,
2532 struct section_offsets *section_offsets, char *filename,
2533 CORE_ADDR textlow, struct partial_symbol **global_syms,
2534 struct partial_symbol **static_syms)
2536 struct partial_symtab *psymtab;
2538 psymtab = allocate_psymtab (filename, objfile);
2539 psymtab->section_offsets = section_offsets;
2540 psymtab->textlow = textlow;
2541 psymtab->texthigh = psymtab->textlow; /* default */
2542 psymtab->globals_offset = global_syms - objfile->global_psymbols.list;
2543 psymtab->statics_offset = static_syms - objfile->static_psymbols.list;
2547 /* Add a symbol with a long value to a psymtab.
2548 Since one arg is a struct, we pass in a ptr and deref it (sigh).
2549 Return the partial symbol that has been added. */
2551 /* NOTE: carlton/2003-09-11: The reason why we return the partial
2552 symbol is so that callers can get access to the symbol's demangled
2553 name, which they don't have any cheap way to determine otherwise.
2554 (Currenly, dwarf2read.c is the only file who uses that information,
2555 though it's possible that other readers might in the future.)
2556 Elena wasn't thrilled about that, and I don't blame her, but we
2557 couldn't come up with a better way to get that information. If
2558 it's needed in other situations, we could consider breaking up
2559 SYMBOL_SET_NAMES to provide access to the demangled name lookup
2562 const struct partial_symbol *
2563 add_psymbol_to_list (char *name, int namelength, domain_enum domain,
2564 enum address_class class,
2565 struct psymbol_allocation_list *list, long val, /* Value as a long */
2566 CORE_ADDR coreaddr, /* Value as a CORE_ADDR */
2567 enum language language, struct objfile *objfile)
2569 struct partial_symbol *psym;
2570 char *buf = alloca (namelength + 1);
2571 /* psymbol is static so that there will be no uninitialized gaps in the
2572 structure which might contain random data, causing cache misses in
2574 static struct partial_symbol psymbol;
2576 /* Create local copy of the partial symbol */
2577 memcpy (buf, name, namelength);
2578 buf[namelength] = '\0';
2579 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2582 SYMBOL_VALUE (&psymbol) = val;
2586 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
2588 SYMBOL_SECTION (&psymbol) = 0;
2589 SYMBOL_LANGUAGE (&psymbol) = language;
2590 PSYMBOL_DOMAIN (&psymbol) = domain;
2591 PSYMBOL_CLASS (&psymbol) = class;
2593 SYMBOL_SET_NAMES (&psymbol, buf, namelength, objfile);
2595 /* Stash the partial symbol away in the cache */
2596 psym = deprecated_bcache (&psymbol, sizeof (struct partial_symbol),
2597 objfile->psymbol_cache);
2599 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2600 if (list->next >= list->list + list->size)
2602 extend_psymbol_list (list, objfile);
2604 *list->next++ = psym;
2605 OBJSTAT (objfile, n_psyms++);
2610 /* Add a symbol with a long value to a psymtab. This differs from
2611 * add_psymbol_to_list above in taking both a mangled and a demangled
2615 add_psymbol_with_dem_name_to_list (char *name, int namelength, char *dem_name,
2616 int dem_namelength, domain_enum domain,
2617 enum address_class class,
2618 struct psymbol_allocation_list *list, long val, /* Value as a long */
2619 CORE_ADDR coreaddr, /* Value as a CORE_ADDR */
2620 enum language language,
2621 struct objfile *objfile)
2623 struct partial_symbol *psym;
2624 char *buf = alloca (namelength + 1);
2625 /* psymbol is static so that there will be no uninitialized gaps in the
2626 structure which might contain random data, causing cache misses in
2628 static struct partial_symbol psymbol;
2630 /* Create local copy of the partial symbol */
2632 memcpy (buf, name, namelength);
2633 buf[namelength] = '\0';
2634 DEPRECATED_SYMBOL_NAME (&psymbol) = deprecated_bcache (buf, namelength + 1,
2635 objfile->psymbol_cache);
2637 buf = alloca (dem_namelength + 1);
2638 memcpy (buf, dem_name, dem_namelength);
2639 buf[dem_namelength] = '\0';
2644 case language_cplus:
2645 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol) =
2646 deprecated_bcache (buf, dem_namelength + 1, objfile->psymbol_cache);
2648 /* FIXME What should be done for the default case? Ignoring for now. */
2651 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2654 SYMBOL_VALUE (&psymbol) = val;
2658 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
2660 SYMBOL_SECTION (&psymbol) = 0;
2661 SYMBOL_LANGUAGE (&psymbol) = language;
2662 PSYMBOL_DOMAIN (&psymbol) = domain;
2663 PSYMBOL_CLASS (&psymbol) = class;
2664 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language);
2666 /* Stash the partial symbol away in the cache */
2667 psym = deprecated_bcache (&psymbol, sizeof (struct partial_symbol),
2668 objfile->psymbol_cache);
2670 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2671 if (list->next >= list->list + list->size)
2673 extend_psymbol_list (list, objfile);
2675 *list->next++ = psym;
2676 OBJSTAT (objfile, n_psyms++);
2679 /* Initialize storage for partial symbols. */
2682 init_psymbol_list (struct objfile *objfile, int total_symbols)
2684 /* Free any previously allocated psymbol lists. */
2686 if (objfile->global_psymbols.list)
2688 xmfree (objfile->md, objfile->global_psymbols.list);
2690 if (objfile->static_psymbols.list)
2692 xmfree (objfile->md, objfile->static_psymbols.list);
2695 /* Current best guess is that approximately a twentieth
2696 of the total symbols (in a debugging file) are global or static
2699 objfile->global_psymbols.size = total_symbols / 10;
2700 objfile->static_psymbols.size = total_symbols / 10;
2702 if (objfile->global_psymbols.size > 0)
2704 objfile->global_psymbols.next =
2705 objfile->global_psymbols.list = (struct partial_symbol **)
2706 xmmalloc (objfile->md, (objfile->global_psymbols.size
2707 * sizeof (struct partial_symbol *)));
2709 if (objfile->static_psymbols.size > 0)
2711 objfile->static_psymbols.next =
2712 objfile->static_psymbols.list = (struct partial_symbol **)
2713 xmmalloc (objfile->md, (objfile->static_psymbols.size
2714 * sizeof (struct partial_symbol *)));
2719 The following code implements an abstraction for debugging overlay sections.
2721 The target model is as follows:
2722 1) The gnu linker will permit multiple sections to be mapped into the
2723 same VMA, each with its own unique LMA (or load address).
2724 2) It is assumed that some runtime mechanism exists for mapping the
2725 sections, one by one, from the load address into the VMA address.
2726 3) This code provides a mechanism for gdb to keep track of which
2727 sections should be considered to be mapped from the VMA to the LMA.
2728 This information is used for symbol lookup, and memory read/write.
2729 For instance, if a section has been mapped then its contents
2730 should be read from the VMA, otherwise from the LMA.
2732 Two levels of debugger support for overlays are available. One is
2733 "manual", in which the debugger relies on the user to tell it which
2734 overlays are currently mapped. This level of support is
2735 implemented entirely in the core debugger, and the information about
2736 whether a section is mapped is kept in the objfile->obj_section table.
2738 The second level of support is "automatic", and is only available if
2739 the target-specific code provides functionality to read the target's
2740 overlay mapping table, and translate its contents for the debugger
2741 (by updating the mapped state information in the obj_section tables).
2743 The interface is as follows:
2745 overlay map <name> -- tell gdb to consider this section mapped
2746 overlay unmap <name> -- tell gdb to consider this section unmapped
2747 overlay list -- list the sections that GDB thinks are mapped
2748 overlay read-target -- get the target's state of what's mapped
2749 overlay off/manual/auto -- set overlay debugging state
2750 Functional interface:
2751 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2752 section, return that section.
2753 find_pc_overlay(pc): find any overlay section that contains
2754 the pc, either in its VMA or its LMA
2755 overlay_is_mapped(sect): true if overlay is marked as mapped
2756 section_is_overlay(sect): true if section's VMA != LMA
2757 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2758 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2759 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2760 overlay_mapped_address(...): map an address from section's LMA to VMA
2761 overlay_unmapped_address(...): map an address from section's VMA to LMA
2762 symbol_overlayed_address(...): Return a "current" address for symbol:
2763 either in VMA or LMA depending on whether
2764 the symbol's section is currently mapped
2767 /* Overlay debugging state: */
2769 enum overlay_debugging_state overlay_debugging = ovly_off;
2770 int overlay_cache_invalid = 0; /* True if need to refresh mapped state */
2772 /* Target vector for refreshing overlay mapped state */
2773 static void simple_overlay_update (struct obj_section *);
2774 void (*target_overlay_update) (struct obj_section *) = simple_overlay_update;
2776 /* Function: section_is_overlay (SECTION)
2777 Returns true if SECTION has VMA not equal to LMA, ie.
2778 SECTION is loaded at an address different from where it will "run". */
2781 section_is_overlay (asection *section)
2783 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2785 if (overlay_debugging)
2786 if (section && section->lma != 0 &&
2787 section->vma != section->lma)
2793 /* Function: overlay_invalidate_all (void)
2794 Invalidate the mapped state of all overlay sections (mark it as stale). */
2797 overlay_invalidate_all (void)
2799 struct objfile *objfile;
2800 struct obj_section *sect;
2802 ALL_OBJSECTIONS (objfile, sect)
2803 if (section_is_overlay (sect->the_bfd_section))
2804 sect->ovly_mapped = -1;
2807 /* Function: overlay_is_mapped (SECTION)
2808 Returns true if section is an overlay, and is currently mapped.
2809 Private: public access is thru function section_is_mapped.
2811 Access to the ovly_mapped flag is restricted to this function, so
2812 that we can do automatic update. If the global flag
2813 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2814 overlay_invalidate_all. If the mapped state of the particular
2815 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2818 overlay_is_mapped (struct obj_section *osect)
2820 if (osect == 0 || !section_is_overlay (osect->the_bfd_section))
2823 switch (overlay_debugging)
2827 return 0; /* overlay debugging off */
2828 case ovly_auto: /* overlay debugging automatic */
2829 /* Unles there is a target_overlay_update function,
2830 there's really nothing useful to do here (can't really go auto) */
2831 if (target_overlay_update)
2833 if (overlay_cache_invalid)
2835 overlay_invalidate_all ();
2836 overlay_cache_invalid = 0;
2838 if (osect->ovly_mapped == -1)
2839 (*target_overlay_update) (osect);
2841 /* fall thru to manual case */
2842 case ovly_on: /* overlay debugging manual */
2843 return osect->ovly_mapped == 1;
2847 /* Function: section_is_mapped
2848 Returns true if section is an overlay, and is currently mapped. */
2851 section_is_mapped (asection *section)
2853 struct objfile *objfile;
2854 struct obj_section *osect;
2856 if (overlay_debugging)
2857 if (section && section_is_overlay (section))
2858 ALL_OBJSECTIONS (objfile, osect)
2859 if (osect->the_bfd_section == section)
2860 return overlay_is_mapped (osect);
2865 /* Function: pc_in_unmapped_range
2866 If PC falls into the lma range of SECTION, return true, else false. */
2869 pc_in_unmapped_range (CORE_ADDR pc, asection *section)
2871 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2875 if (overlay_debugging)
2876 if (section && section_is_overlay (section))
2878 size = bfd_get_section_size (section);
2879 if (section->lma <= pc && pc < section->lma + size)
2885 /* Function: pc_in_mapped_range
2886 If PC falls into the vma range of SECTION, return true, else false. */
2889 pc_in_mapped_range (CORE_ADDR pc, asection *section)
2891 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2895 if (overlay_debugging)
2896 if (section && section_is_overlay (section))
2898 size = bfd_get_section_size (section);
2899 if (section->vma <= pc && pc < section->vma + size)
2906 /* Return true if the mapped ranges of sections A and B overlap, false
2909 sections_overlap (asection *a, asection *b)
2911 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2913 CORE_ADDR a_start = a->vma;
2914 CORE_ADDR a_end = a->vma + bfd_get_section_size (a);
2915 CORE_ADDR b_start = b->vma;
2916 CORE_ADDR b_end = b->vma + bfd_get_section_size (b);
2918 return (a_start < b_end && b_start < a_end);
2921 /* Function: overlay_unmapped_address (PC, SECTION)
2922 Returns the address corresponding to PC in the unmapped (load) range.
2923 May be the same as PC. */
2926 overlay_unmapped_address (CORE_ADDR pc, asection *section)
2928 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2930 if (overlay_debugging)
2931 if (section && section_is_overlay (section) &&
2932 pc_in_mapped_range (pc, section))
2933 return pc + section->lma - section->vma;
2938 /* Function: overlay_mapped_address (PC, SECTION)
2939 Returns the address corresponding to PC in the mapped (runtime) range.
2940 May be the same as PC. */
2943 overlay_mapped_address (CORE_ADDR pc, asection *section)
2945 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2947 if (overlay_debugging)
2948 if (section && section_is_overlay (section) &&
2949 pc_in_unmapped_range (pc, section))
2950 return pc + section->vma - section->lma;
2956 /* Function: symbol_overlayed_address
2957 Return one of two addresses (relative to the VMA or to the LMA),
2958 depending on whether the section is mapped or not. */
2961 symbol_overlayed_address (CORE_ADDR address, asection *section)
2963 if (overlay_debugging)
2965 /* If the symbol has no section, just return its regular address. */
2968 /* If the symbol's section is not an overlay, just return its address */
2969 if (!section_is_overlay (section))
2971 /* If the symbol's section is mapped, just return its address */
2972 if (section_is_mapped (section))
2975 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
2976 * then return its LOADED address rather than its vma address!!
2978 return overlay_unmapped_address (address, section);
2983 /* Function: find_pc_overlay (PC)
2984 Return the best-match overlay section for PC:
2985 If PC matches a mapped overlay section's VMA, return that section.
2986 Else if PC matches an unmapped section's VMA, return that section.
2987 Else if PC matches an unmapped section's LMA, return that section. */
2990 find_pc_overlay (CORE_ADDR pc)
2992 struct objfile *objfile;
2993 struct obj_section *osect, *best_match = NULL;
2995 if (overlay_debugging)
2996 ALL_OBJSECTIONS (objfile, osect)
2997 if (section_is_overlay (osect->the_bfd_section))
2999 if (pc_in_mapped_range (pc, osect->the_bfd_section))
3001 if (overlay_is_mapped (osect))
3002 return osect->the_bfd_section;
3006 else if (pc_in_unmapped_range (pc, osect->the_bfd_section))
3009 return best_match ? best_match->the_bfd_section : NULL;
3012 /* Function: find_pc_mapped_section (PC)
3013 If PC falls into the VMA address range of an overlay section that is
3014 currently marked as MAPPED, return that section. Else return NULL. */
3017 find_pc_mapped_section (CORE_ADDR pc)
3019 struct objfile *objfile;
3020 struct obj_section *osect;
3022 if (overlay_debugging)
3023 ALL_OBJSECTIONS (objfile, osect)
3024 if (pc_in_mapped_range (pc, osect->the_bfd_section) &&
3025 overlay_is_mapped (osect))
3026 return osect->the_bfd_section;
3031 /* Function: list_overlays_command
3032 Print a list of mapped sections and their PC ranges */
3035 list_overlays_command (char *args, int from_tty)
3038 struct objfile *objfile;
3039 struct obj_section *osect;
3041 if (overlay_debugging)
3042 ALL_OBJSECTIONS (objfile, osect)
3043 if (overlay_is_mapped (osect))
3049 vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section);
3050 lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section);
3051 size = bfd_get_section_size (osect->the_bfd_section);
3052 name = bfd_section_name (objfile->obfd, osect->the_bfd_section);
3054 printf_filtered ("Section %s, loaded at ", name);
3055 print_address_numeric (lma, 1, gdb_stdout);
3056 puts_filtered (" - ");
3057 print_address_numeric (lma + size, 1, gdb_stdout);
3058 printf_filtered (", mapped at ");
3059 print_address_numeric (vma, 1, gdb_stdout);
3060 puts_filtered (" - ");
3061 print_address_numeric (vma + size, 1, gdb_stdout);
3062 puts_filtered ("\n");
3067 printf_filtered ("No sections are mapped.\n");
3070 /* Function: map_overlay_command
3071 Mark the named section as mapped (ie. residing at its VMA address). */
3074 map_overlay_command (char *args, int from_tty)
3076 struct objfile *objfile, *objfile2;
3077 struct obj_section *sec, *sec2;
3080 if (!overlay_debugging)
3082 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3083 the 'overlay manual' command.");
3085 if (args == 0 || *args == 0)
3086 error ("Argument required: name of an overlay section");
3088 /* First, find a section matching the user supplied argument */
3089 ALL_OBJSECTIONS (objfile, sec)
3090 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
3092 /* Now, check to see if the section is an overlay. */
3093 bfdsec = sec->the_bfd_section;
3094 if (!section_is_overlay (bfdsec))
3095 continue; /* not an overlay section */
3097 /* Mark the overlay as "mapped" */
3098 sec->ovly_mapped = 1;
3100 /* Next, make a pass and unmap any sections that are
3101 overlapped by this new section: */
3102 ALL_OBJSECTIONS (objfile2, sec2)
3103 if (sec2->ovly_mapped
3105 && sec->the_bfd_section != sec2->the_bfd_section
3106 && sections_overlap (sec->the_bfd_section,
3107 sec2->the_bfd_section))
3110 printf_unfiltered ("Note: section %s unmapped by overlap\n",
3111 bfd_section_name (objfile->obfd,
3112 sec2->the_bfd_section));
3113 sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2 */
3117 error ("No overlay section called %s", args);
3120 /* Function: unmap_overlay_command
3121 Mark the overlay section as unmapped
3122 (ie. resident in its LMA address range, rather than the VMA range). */
3125 unmap_overlay_command (char *args, int from_tty)
3127 struct objfile *objfile;
3128 struct obj_section *sec;
3130 if (!overlay_debugging)
3132 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3133 the 'overlay manual' command.");
3135 if (args == 0 || *args == 0)
3136 error ("Argument required: name of an overlay section");
3138 /* First, find a section matching the user supplied argument */
3139 ALL_OBJSECTIONS (objfile, sec)
3140 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
3142 if (!sec->ovly_mapped)
3143 error ("Section %s is not mapped", args);
3144 sec->ovly_mapped = 0;
3147 error ("No overlay section called %s", args);
3150 /* Function: overlay_auto_command
3151 A utility command to turn on overlay debugging.
3152 Possibly this should be done via a set/show command. */
3155 overlay_auto_command (char *args, int from_tty)
3157 overlay_debugging = ovly_auto;
3158 enable_overlay_breakpoints ();
3160 printf_unfiltered ("Automatic overlay debugging enabled.");
3163 /* Function: overlay_manual_command
3164 A utility command to turn on overlay debugging.
3165 Possibly this should be done via a set/show command. */
3168 overlay_manual_command (char *args, int from_tty)
3170 overlay_debugging = ovly_on;
3171 disable_overlay_breakpoints ();
3173 printf_unfiltered ("Overlay debugging enabled.");
3176 /* Function: overlay_off_command
3177 A utility command to turn on overlay debugging.
3178 Possibly this should be done via a set/show command. */
3181 overlay_off_command (char *args, int from_tty)
3183 overlay_debugging = ovly_off;
3184 disable_overlay_breakpoints ();
3186 printf_unfiltered ("Overlay debugging disabled.");
3190 overlay_load_command (char *args, int from_tty)
3192 if (target_overlay_update)
3193 (*target_overlay_update) (NULL);
3195 error ("This target does not know how to read its overlay state.");
3198 /* Function: overlay_command
3199 A place-holder for a mis-typed command */
3201 /* Command list chain containing all defined "overlay" subcommands. */
3202 struct cmd_list_element *overlaylist;
3205 overlay_command (char *args, int from_tty)
3208 ("\"overlay\" must be followed by the name of an overlay command.\n");
3209 help_list (overlaylist, "overlay ", -1, gdb_stdout);
3213 /* Target Overlays for the "Simplest" overlay manager:
3215 This is GDB's default target overlay layer. It works with the
3216 minimal overlay manager supplied as an example by Cygnus. The
3217 entry point is via a function pointer "target_overlay_update",
3218 so targets that use a different runtime overlay manager can
3219 substitute their own overlay_update function and take over the
3222 The overlay_update function pokes around in the target's data structures
3223 to see what overlays are mapped, and updates GDB's overlay mapping with
3226 In this simple implementation, the target data structures are as follows:
3227 unsigned _novlys; /# number of overlay sections #/
3228 unsigned _ovly_table[_novlys][4] = {
3229 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3230 {..., ..., ..., ...},
3232 unsigned _novly_regions; /# number of overlay regions #/
3233 unsigned _ovly_region_table[_novly_regions][3] = {
3234 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3237 These functions will attempt to update GDB's mappedness state in the
3238 symbol section table, based on the target's mappedness state.
3240 To do this, we keep a cached copy of the target's _ovly_table, and
3241 attempt to detect when the cached copy is invalidated. The main
3242 entry point is "simple_overlay_update(SECT), which looks up SECT in
3243 the cached table and re-reads only the entry for that section from
3244 the target (whenever possible).
3247 /* Cached, dynamically allocated copies of the target data structures: */
3248 static unsigned (*cache_ovly_table)[4] = 0;
3250 static unsigned (*cache_ovly_region_table)[3] = 0;
3252 static unsigned cache_novlys = 0;
3254 static unsigned cache_novly_regions = 0;
3256 static CORE_ADDR cache_ovly_table_base = 0;
3258 static CORE_ADDR cache_ovly_region_table_base = 0;
3262 VMA, SIZE, LMA, MAPPED
3264 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
3266 /* Throw away the cached copy of _ovly_table */
3268 simple_free_overlay_table (void)
3270 if (cache_ovly_table)
3271 xfree (cache_ovly_table);
3273 cache_ovly_table = NULL;
3274 cache_ovly_table_base = 0;
3278 /* Throw away the cached copy of _ovly_region_table */
3280 simple_free_overlay_region_table (void)
3282 if (cache_ovly_region_table)
3283 xfree (cache_ovly_region_table);
3284 cache_novly_regions = 0;
3285 cache_ovly_region_table = NULL;
3286 cache_ovly_region_table_base = 0;
3290 /* Read an array of ints from the target into a local buffer.
3291 Convert to host order. int LEN is number of ints */
3293 read_target_long_array (CORE_ADDR memaddr, unsigned int *myaddr, int len)
3295 /* FIXME (alloca): Not safe if array is very large. */
3296 char *buf = alloca (len * TARGET_LONG_BYTES);
3299 read_memory (memaddr, buf, len * TARGET_LONG_BYTES);
3300 for (i = 0; i < len; i++)
3301 myaddr[i] = extract_unsigned_integer (TARGET_LONG_BYTES * i + buf,
3305 /* Find and grab a copy of the target _ovly_table
3306 (and _novlys, which is needed for the table's size) */
3308 simple_read_overlay_table (void)
3310 struct minimal_symbol *novlys_msym, *ovly_table_msym;
3312 simple_free_overlay_table ();
3313 novlys_msym = lookup_minimal_symbol ("_novlys", NULL, NULL);
3316 error ("Error reading inferior's overlay table: "
3317 "couldn't find `_novlys' variable\n"
3318 "in inferior. Use `overlay manual' mode.");
3322 ovly_table_msym = lookup_minimal_symbol ("_ovly_table", NULL, NULL);
3323 if (! ovly_table_msym)
3325 error ("Error reading inferior's overlay table: couldn't find "
3326 "`_ovly_table' array\n"
3327 "in inferior. Use `overlay manual' mode.");
3331 cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym), 4);
3333 = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table));
3334 cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (ovly_table_msym);
3335 read_target_long_array (cache_ovly_table_base,
3336 (int *) cache_ovly_table,
3339 return 1; /* SUCCESS */
3343 /* Find and grab a copy of the target _ovly_region_table
3344 (and _novly_regions, which is needed for the table's size) */
3346 simple_read_overlay_region_table (void)
3348 struct minimal_symbol *msym;
3350 simple_free_overlay_region_table ();
3351 msym = lookup_minimal_symbol ("_novly_regions", NULL, NULL);
3353 cache_novly_regions = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4);
3355 return 0; /* failure */
3356 cache_ovly_region_table = (void *) xmalloc (cache_novly_regions * 12);
3357 if (cache_ovly_region_table != NULL)
3359 msym = lookup_minimal_symbol ("_ovly_region_table", NULL, NULL);
3362 cache_ovly_region_table_base = SYMBOL_VALUE_ADDRESS (msym);
3363 read_target_long_array (cache_ovly_region_table_base,
3364 (int *) cache_ovly_region_table,
3365 cache_novly_regions * 3);
3368 return 0; /* failure */
3371 return 0; /* failure */
3372 return 1; /* SUCCESS */
3376 /* Function: simple_overlay_update_1
3377 A helper function for simple_overlay_update. Assuming a cached copy
3378 of _ovly_table exists, look through it to find an entry whose vma,
3379 lma and size match those of OSECT. Re-read the entry and make sure
3380 it still matches OSECT (else the table may no longer be valid).
3381 Set OSECT's mapped state to match the entry. Return: 1 for
3382 success, 0 for failure. */
3385 simple_overlay_update_1 (struct obj_section *osect)
3388 bfd *obfd = osect->objfile->obfd;
3389 asection *bsect = osect->the_bfd_section;
3391 size = bfd_get_section_size (osect->the_bfd_section);
3392 for (i = 0; i < cache_novlys; i++)
3393 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3394 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3395 /* && cache_ovly_table[i][SIZE] == size */ )
3397 read_target_long_array (cache_ovly_table_base + i * TARGET_LONG_BYTES,
3398 (int *) cache_ovly_table[i], 4);
3399 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3400 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3401 /* && cache_ovly_table[i][SIZE] == size */ )
3403 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3406 else /* Warning! Warning! Target's ovly table has changed! */
3412 /* Function: simple_overlay_update
3413 If OSECT is NULL, then update all sections' mapped state
3414 (after re-reading the entire target _ovly_table).
3415 If OSECT is non-NULL, then try to find a matching entry in the
3416 cached ovly_table and update only OSECT's mapped state.
3417 If a cached entry can't be found or the cache isn't valid, then
3418 re-read the entire cache, and go ahead and update all sections. */
3421 simple_overlay_update (struct obj_section *osect)
3423 struct objfile *objfile;
3425 /* Were we given an osect to look up? NULL means do all of them. */
3427 /* Have we got a cached copy of the target's overlay table? */
3428 if (cache_ovly_table != NULL)
3429 /* Does its cached location match what's currently in the symtab? */
3430 if (cache_ovly_table_base ==
3431 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL, NULL)))
3432 /* Then go ahead and try to look up this single section in the cache */
3433 if (simple_overlay_update_1 (osect))
3434 /* Found it! We're done. */
3437 /* Cached table no good: need to read the entire table anew.
3438 Or else we want all the sections, in which case it's actually
3439 more efficient to read the whole table in one block anyway. */
3441 if (! simple_read_overlay_table ())
3444 /* Now may as well update all sections, even if only one was requested. */
3445 ALL_OBJSECTIONS (objfile, osect)
3446 if (section_is_overlay (osect->the_bfd_section))
3449 bfd *obfd = osect->objfile->obfd;
3450 asection *bsect = osect->the_bfd_section;
3452 size = bfd_get_section_size (bsect);
3453 for (i = 0; i < cache_novlys; i++)
3454 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3455 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3456 /* && cache_ovly_table[i][SIZE] == size */ )
3457 { /* obj_section matches i'th entry in ovly_table */
3458 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3459 break; /* finished with inner for loop: break out */
3464 /* Set the output sections and output offsets for section SECTP in
3465 ABFD. The relocation code in BFD will read these offsets, so we
3466 need to be sure they're initialized. We map each section to itself,
3467 with no offset; this means that SECTP->vma will be honored. */
3470 symfile_dummy_outputs (bfd *abfd, asection *sectp, void *dummy)
3472 sectp->output_section = sectp;
3473 sectp->output_offset = 0;
3476 /* Relocate the contents of a debug section SECTP in ABFD. The
3477 contents are stored in BUF if it is non-NULL, or returned in a
3478 malloc'd buffer otherwise.
3480 For some platforms and debug info formats, shared libraries contain
3481 relocations against the debug sections (particularly for DWARF-2;
3482 one affected platform is PowerPC GNU/Linux, although it depends on
3483 the version of the linker in use). Also, ELF object files naturally
3484 have unresolved relocations for their debug sections. We need to apply
3485 the relocations in order to get the locations of symbols correct. */
3488 symfile_relocate_debug_section (bfd *abfd, asection *sectp, bfd_byte *buf)
3490 /* We're only interested in debugging sections with relocation
3492 if ((sectp->flags & SEC_RELOC) == 0)
3494 if ((sectp->flags & SEC_DEBUGGING) == 0)
3497 /* We will handle section offsets properly elsewhere, so relocate as if
3498 all sections begin at 0. */
3499 bfd_map_over_sections (abfd, symfile_dummy_outputs, NULL);
3501 return bfd_simple_get_relocated_section_contents (abfd, sectp, buf, NULL);
3505 _initialize_symfile (void)
3507 struct cmd_list_element *c;
3509 c = add_cmd ("symbol-file", class_files, symbol_file_command,
3510 "Load symbol table from executable file FILE.\n\
3511 The `file' command can also load symbol tables, as well as setting the file\n\
3512 to execute.", &cmdlist);
3513 set_cmd_completer (c, filename_completer);
3515 c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command,
3516 "Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3517 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3518 ADDR is the starting address of the file's text.\n\
3519 The optional arguments are section-name section-address pairs and\n\
3520 should be specified if the data and bss segments are not contiguous\n\
3521 with the text. SECT is a section name to be loaded at SECT_ADDR.",
3523 set_cmd_completer (c, filename_completer);
3525 c = add_cmd ("add-shared-symbol-files", class_files,
3526 add_shared_symbol_files_command,
3527 "Load the symbols from shared objects in the dynamic linker's link map.",
3529 c = add_alias_cmd ("assf", "add-shared-symbol-files", class_files, 1,
3532 c = add_cmd ("load", class_files, load_command,
3533 "Dynamically load FILE into the running program, and record its symbols\n\
3534 for access from GDB.", &cmdlist);
3535 set_cmd_completer (c, filename_completer);
3537 deprecated_add_show_from_set
3538 (add_set_cmd ("symbol-reloading", class_support, var_boolean,
3539 (char *) &symbol_reloading,
3540 "Set dynamic symbol table reloading multiple times in one run.",
3544 add_prefix_cmd ("overlay", class_support, overlay_command,
3545 "Commands for debugging overlays.", &overlaylist,
3546 "overlay ", 0, &cmdlist);
3548 add_com_alias ("ovly", "overlay", class_alias, 1);
3549 add_com_alias ("ov", "overlay", class_alias, 1);
3551 add_cmd ("map-overlay", class_support, map_overlay_command,
3552 "Assert that an overlay section is mapped.", &overlaylist);
3554 add_cmd ("unmap-overlay", class_support, unmap_overlay_command,
3555 "Assert that an overlay section is unmapped.", &overlaylist);
3557 add_cmd ("list-overlays", class_support, list_overlays_command,
3558 "List mappings of overlay sections.", &overlaylist);
3560 add_cmd ("manual", class_support, overlay_manual_command,
3561 "Enable overlay debugging.", &overlaylist);
3562 add_cmd ("off", class_support, overlay_off_command,
3563 "Disable overlay debugging.", &overlaylist);
3564 add_cmd ("auto", class_support, overlay_auto_command,
3565 "Enable automatic overlay debugging.", &overlaylist);
3566 add_cmd ("load-target", class_support, overlay_load_command,
3567 "Read the overlay mapping state from the target.", &overlaylist);
3569 /* Filename extension to source language lookup table: */
3570 init_filename_language_table ();
3571 c = add_set_cmd ("extension-language", class_files, var_string_noescape,
3573 "Set mapping between filename extension and source language.\n\
3574 Usage: set extension-language .foo bar",
3576 set_cmd_cfunc (c, set_ext_lang_command);
3578 add_info ("extensions", info_ext_lang_command,
3579 "All filename extensions associated with a source language.");
3581 deprecated_add_show_from_set
3582 (add_set_cmd ("download-write-size", class_obscure,
3583 var_integer, (char *) &download_write_size,
3584 "Set the write size used when downloading a program.\n"
3585 "Only used when downloading a program onto a remote\n"
3586 "target. Specify zero, or a negative value, to disable\n"
3587 "blocked writes. The actual size of each transfer is also\n"
3588 "limited by the size of the target packet and the memory\n"
3593 debug_file_directory = xstrdup (DEBUGDIR);
3595 ("debug-file-directory", class_support, var_string,
3596 (char *) &debug_file_directory,
3597 "Set the directory where separate debug symbols are searched for.\n"
3598 "Separate debug symbols are first searched for in the same\n"
3599 "directory as the binary, then in the `" DEBUG_SUBDIRECTORY
3601 "and lastly at the path of the directory of the binary with\n"
3602 "the global debug-file directory prepended\n",
3604 deprecated_add_show_from_set (c, &showlist);
3605 set_cmd_completer (c, filename_completer);