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"
65 /* Some HP-UX related globals to clear when a new "main"
66 symbol file is loaded. HP-specific. */
68 extern int hp_cxx_exception_support_initialized;
69 #define RESET_HP_UX_GLOBALS() do {\
70 deprecated_hp_som_som_object_present = 0; /* indicates HP-compiled code */ \
71 hp_cxx_exception_support_initialized = 0; /* must reinitialize exception stuff */ \
75 int (*ui_load_progress_hook) (const char *section, unsigned long num);
76 void (*show_load_progress) (const char *section,
77 unsigned long section_sent,
78 unsigned long section_size,
79 unsigned long total_sent,
80 unsigned long total_size);
81 void (*pre_add_symbol_hook) (const char *);
82 void (*post_add_symbol_hook) (void);
83 void (*target_new_objfile_hook) (struct objfile *);
85 static void clear_symtab_users_cleanup (void *ignore);
87 /* Global variables owned by this file */
88 int readnow_symbol_files; /* Read full symbols immediately */
90 /* External variables and functions referenced. */
92 extern void report_transfer_performance (unsigned long, time_t, time_t);
94 /* Functions this file defines */
97 static int simple_read_overlay_region_table (void);
98 static void simple_free_overlay_region_table (void);
101 static void set_initial_language (void);
103 static void load_command (char *, int);
105 static void symbol_file_add_main_1 (char *args, int from_tty, int flags);
107 static void add_symbol_file_command (char *, int);
109 static void add_shared_symbol_files_command (char *, int);
111 static void reread_separate_symbols (struct objfile *objfile);
113 static void cashier_psymtab (struct partial_symtab *);
115 bfd *symfile_bfd_open (char *);
117 int get_section_index (struct objfile *, char *);
119 static void find_sym_fns (struct objfile *);
121 static void decrement_reading_symtab (void *);
123 static void overlay_invalidate_all (void);
125 static int overlay_is_mapped (struct obj_section *);
127 void list_overlays_command (char *, int);
129 void map_overlay_command (char *, int);
131 void unmap_overlay_command (char *, int);
133 static void overlay_auto_command (char *, int);
135 static void overlay_manual_command (char *, int);
137 static void overlay_off_command (char *, int);
139 static void overlay_load_command (char *, int);
141 static void overlay_command (char *, int);
143 static void simple_free_overlay_table (void);
145 static void read_target_long_array (CORE_ADDR, unsigned int *, int);
147 static int simple_read_overlay_table (void);
149 static int simple_overlay_update_1 (struct obj_section *);
151 static void add_filename_language (char *ext, enum language lang);
153 static void set_ext_lang_command (char *args, int from_tty);
155 static void info_ext_lang_command (char *args, int from_tty);
157 static char *find_separate_debug_file (struct objfile *objfile);
159 static void init_filename_language_table (void);
161 void _initialize_symfile (void);
163 /* List of all available sym_fns. On gdb startup, each object file reader
164 calls add_symtab_fns() to register information on each format it is
167 static struct sym_fns *symtab_fns = NULL;
169 /* Flag for whether user will be reloading symbols multiple times.
170 Defaults to ON for VxWorks, otherwise OFF. */
172 #ifdef SYMBOL_RELOADING_DEFAULT
173 int symbol_reloading = SYMBOL_RELOADING_DEFAULT;
175 int symbol_reloading = 0;
178 /* If non-zero, shared library symbols will be added automatically
179 when the inferior is created, new libraries are loaded, or when
180 attaching to the inferior. This is almost always what users will
181 want to have happen; but for very large programs, the startup time
182 will be excessive, and so if this is a problem, the user can clear
183 this flag and then add the shared library symbols as needed. Note
184 that there is a potential for confusion, since if the shared
185 library symbols are not loaded, commands like "info fun" will *not*
186 report all the functions that are actually present. */
188 int auto_solib_add = 1;
190 /* For systems that support it, a threshold size in megabytes. If
191 automatically adding a new library's symbol table to those already
192 known to the debugger would cause the total shared library symbol
193 size to exceed this threshhold, then the shlib's symbols are not
194 added. The threshold is ignored if the user explicitly asks for a
195 shlib to be added, such as when using the "sharedlibrary"
198 int auto_solib_limit;
201 /* This compares two partial symbols by names, using strcmp_iw_ordered
202 for the comparison. */
205 compare_psymbols (const void *s1p, const void *s2p)
207 struct partial_symbol *const *s1 = s1p;
208 struct partial_symbol *const *s2 = s2p;
210 return strcmp_iw_ordered (SYMBOL_NATURAL_NAME (*s1),
211 SYMBOL_NATURAL_NAME (*s2));
215 sort_pst_symbols (struct partial_symtab *pst)
217 /* Sort the global list; don't sort the static list */
219 qsort (pst->objfile->global_psymbols.list + pst->globals_offset,
220 pst->n_global_syms, sizeof (struct partial_symbol *),
224 /* Make a null terminated copy of the string at PTR with SIZE characters in
225 the obstack pointed to by OBSTACKP . Returns the address of the copy.
226 Note that the string at PTR does not have to be null terminated, I.E. it
227 may be part of a larger string and we are only saving a substring. */
230 obsavestring (const char *ptr, int size, struct obstack *obstackp)
232 char *p = (char *) obstack_alloc (obstackp, size + 1);
233 /* Open-coded memcpy--saves function call time. These strings are usually
234 short. FIXME: Is this really still true with a compiler that can
237 const char *p1 = ptr;
239 const char *end = ptr + size;
247 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
248 in the obstack pointed to by OBSTACKP. */
251 obconcat (struct obstack *obstackp, const char *s1, const char *s2,
254 int len = strlen (s1) + strlen (s2) + strlen (s3) + 1;
255 char *val = (char *) obstack_alloc (obstackp, len);
262 /* True if we are nested inside psymtab_to_symtab. */
264 int currently_reading_symtab = 0;
267 decrement_reading_symtab (void *dummy)
269 currently_reading_symtab--;
272 /* Get the symbol table that corresponds to a partial_symtab.
273 This is fast after the first time you do it. In fact, there
274 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
278 psymtab_to_symtab (struct partial_symtab *pst)
280 /* If it's been looked up before, return it. */
284 /* If it has not yet been read in, read it. */
287 struct cleanup *back_to = make_cleanup (decrement_reading_symtab, NULL);
288 currently_reading_symtab++;
289 (*pst->read_symtab) (pst);
290 do_cleanups (back_to);
296 /* Remember the lowest-addressed loadable section we've seen.
297 This function is called via bfd_map_over_sections.
299 In case of equal vmas, the section with the largest size becomes the
300 lowest-addressed loadable section.
302 If the vmas and sizes are equal, the last section is considered the
303 lowest-addressed loadable section. */
306 find_lowest_section (bfd *abfd, asection *sect, void *obj)
308 asection **lowest = (asection **) obj;
310 if (0 == (bfd_get_section_flags (abfd, sect) & SEC_LOAD))
313 *lowest = sect; /* First loadable section */
314 else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect))
315 *lowest = sect; /* A lower loadable section */
316 else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect)
317 && (bfd_section_size (abfd, (*lowest))
318 <= bfd_section_size (abfd, sect)))
322 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
324 struct section_addr_info *
325 alloc_section_addr_info (size_t num_sections)
327 struct section_addr_info *sap;
330 size = (sizeof (struct section_addr_info)
331 + sizeof (struct other_sections) * (num_sections - 1));
332 sap = (struct section_addr_info *) xmalloc (size);
333 memset (sap, 0, size);
334 sap->num_sections = num_sections;
339 /* Build (allocate and populate) a section_addr_info struct from
340 an existing section table. */
342 extern struct section_addr_info *
343 build_section_addr_info_from_section_table (const struct section_table *start,
344 const struct section_table *end)
346 struct section_addr_info *sap;
347 const struct section_table *stp;
350 sap = alloc_section_addr_info (end - start);
352 for (stp = start, oidx = 0; stp != end; stp++)
354 if (bfd_get_section_flags (stp->bfd,
355 stp->the_bfd_section) & (SEC_ALLOC | SEC_LOAD)
356 && oidx < end - start)
358 sap->other[oidx].addr = stp->addr;
359 sap->other[oidx].name
360 = xstrdup (bfd_section_name (stp->bfd, stp->the_bfd_section));
361 sap->other[oidx].sectindex = stp->the_bfd_section->index;
370 /* Free all memory allocated by build_section_addr_info_from_section_table. */
373 free_section_addr_info (struct section_addr_info *sap)
377 for (idx = 0; idx < sap->num_sections; idx++)
378 if (sap->other[idx].name)
379 xfree (sap->other[idx].name);
384 /* Initialize OBJFILE's sect_index_* members. */
386 init_objfile_sect_indices (struct objfile *objfile)
391 sect = bfd_get_section_by_name (objfile->obfd, ".text");
393 objfile->sect_index_text = sect->index;
395 sect = bfd_get_section_by_name (objfile->obfd, ".data");
397 objfile->sect_index_data = sect->index;
399 sect = bfd_get_section_by_name (objfile->obfd, ".bss");
401 objfile->sect_index_bss = sect->index;
403 sect = bfd_get_section_by_name (objfile->obfd, ".rodata");
405 objfile->sect_index_rodata = sect->index;
407 /* This is where things get really weird... We MUST have valid
408 indices for the various sect_index_* members or gdb will abort.
409 So if for example, there is no ".text" section, we have to
410 accomodate that. Except when explicitly adding symbol files at
411 some address, section_offsets contains nothing but zeros, so it
412 doesn't matter which slot in section_offsets the individual
413 sect_index_* members index into. So if they are all zero, it is
414 safe to just point all the currently uninitialized indices to the
417 for (i = 0; i < objfile->num_sections; i++)
419 if (ANOFFSET (objfile->section_offsets, i) != 0)
424 if (i == objfile->num_sections)
426 if (objfile->sect_index_text == -1)
427 objfile->sect_index_text = 0;
428 if (objfile->sect_index_data == -1)
429 objfile->sect_index_data = 0;
430 if (objfile->sect_index_bss == -1)
431 objfile->sect_index_bss = 0;
432 if (objfile->sect_index_rodata == -1)
433 objfile->sect_index_rodata = 0;
438 /* Parse the user's idea of an offset for dynamic linking, into our idea
439 of how to represent it for fast symbol reading. This is the default
440 version of the sym_fns.sym_offsets function for symbol readers that
441 don't need to do anything special. It allocates a section_offsets table
442 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
445 default_symfile_offsets (struct objfile *objfile,
446 struct section_addr_info *addrs)
450 objfile->num_sections = bfd_count_sections (objfile->obfd);
451 objfile->section_offsets = (struct section_offsets *)
452 obstack_alloc (&objfile->objfile_obstack,
453 SIZEOF_N_SECTION_OFFSETS (objfile->num_sections));
454 memset (objfile->section_offsets, 0,
455 SIZEOF_N_SECTION_OFFSETS (objfile->num_sections));
457 /* Now calculate offsets for section that were specified by the
459 for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++)
461 struct other_sections *osp ;
463 osp = &addrs->other[i] ;
467 /* Record all sections in offsets */
468 /* The section_offsets in the objfile are here filled in using
470 (objfile->section_offsets)->offsets[osp->sectindex] = osp->addr;
473 /* Remember the bfd indexes for the .text, .data, .bss and
475 init_objfile_sect_indices (objfile);
479 /* Process a symbol file, as either the main file or as a dynamically
482 OBJFILE is where the symbols are to be read from.
484 ADDRS is the list of section load addresses. If the user has given
485 an 'add-symbol-file' command, then this is the list of offsets and
486 addresses he or she provided as arguments to the command; or, if
487 we're handling a shared library, these are the actual addresses the
488 sections are loaded at, according to the inferior's dynamic linker
489 (as gleaned by GDB's shared library code). We convert each address
490 into an offset from the section VMA's as it appears in the object
491 file, and then call the file's sym_offsets function to convert this
492 into a format-specific offset table --- a `struct section_offsets'.
493 If ADDRS is non-zero, OFFSETS must be zero.
495 OFFSETS is a table of section offsets already in the right
496 format-specific representation. NUM_OFFSETS is the number of
497 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
498 assume this is the proper table the call to sym_offsets described
499 above would produce. Instead of calling sym_offsets, we just dump
500 it right into objfile->section_offsets. (When we're re-reading
501 symbols from an objfile, we don't have the original load address
502 list any more; all we have is the section offset table.) If
503 OFFSETS is non-zero, ADDRS must be zero.
505 MAINLINE is nonzero if this is the main symbol file, or zero if
506 it's an extra symbol file such as dynamically loaded code.
508 VERBO is nonzero if the caller has printed a verbose message about
509 the symbol reading (and complaints can be more terse about it). */
512 syms_from_objfile (struct objfile *objfile,
513 struct section_addr_info *addrs,
514 struct section_offsets *offsets,
519 struct section_addr_info *local_addr = NULL;
520 struct cleanup *old_chain;
522 gdb_assert (! (addrs && offsets));
524 init_entry_point_info (objfile);
525 find_sym_fns (objfile);
527 if (objfile->sf == NULL)
528 return; /* No symbols. */
530 /* Make sure that partially constructed symbol tables will be cleaned up
531 if an error occurs during symbol reading. */
532 old_chain = make_cleanup_free_objfile (objfile);
534 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
535 list. We now establish the convention that an addr of zero means
536 no load address was specified. */
537 if (! addrs && ! offsets)
540 = alloc_section_addr_info (bfd_count_sections (objfile->obfd));
541 make_cleanup (xfree, local_addr);
545 /* Now either addrs or offsets is non-zero. */
549 /* We will modify the main symbol table, make sure that all its users
550 will be cleaned up if an error occurs during symbol reading. */
551 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
553 /* Since no error yet, throw away the old symbol table. */
555 if (symfile_objfile != NULL)
557 free_objfile (symfile_objfile);
558 symfile_objfile = NULL;
561 /* Currently we keep symbols from the add-symbol-file command.
562 If the user wants to get rid of them, they should do "symbol-file"
563 without arguments first. Not sure this is the best behavior
566 (*objfile->sf->sym_new_init) (objfile);
569 /* Convert addr into an offset rather than an absolute address.
570 We find the lowest address of a loaded segment in the objfile,
571 and assume that <addr> is where that got loaded.
573 We no longer warn if the lowest section is not a text segment (as
574 happens for the PA64 port. */
575 if (!mainline && addrs && addrs->other[0].name)
577 asection *lower_sect;
579 CORE_ADDR lower_offset;
582 /* Find lowest loadable section to be used as starting point for
583 continguous sections. FIXME!! won't work without call to find
584 .text first, but this assumes text is lowest section. */
585 lower_sect = bfd_get_section_by_name (objfile->obfd, ".text");
586 if (lower_sect == NULL)
587 bfd_map_over_sections (objfile->obfd, find_lowest_section,
589 if (lower_sect == NULL)
590 warning ("no loadable sections found in added symbol-file %s",
593 if ((bfd_get_section_flags (objfile->obfd, lower_sect) & SEC_CODE) == 0)
594 warning ("Lowest section in %s is %s at %s",
596 bfd_section_name (objfile->obfd, lower_sect),
597 paddr (bfd_section_vma (objfile->obfd, lower_sect)));
598 if (lower_sect != NULL)
599 lower_offset = bfd_section_vma (objfile->obfd, lower_sect);
603 /* Calculate offsets for the loadable sections.
604 FIXME! Sections must be in order of increasing loadable section
605 so that contiguous sections can use the lower-offset!!!
607 Adjust offsets if the segments are not contiguous.
608 If the section is contiguous, its offset should be set to
609 the offset of the highest loadable section lower than it
610 (the loadable section directly below it in memory).
611 this_offset = lower_offset = lower_addr - lower_orig_addr */
613 for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++)
615 if (addrs->other[i].addr != 0)
617 sect = bfd_get_section_by_name (objfile->obfd,
618 addrs->other[i].name);
622 -= bfd_section_vma (objfile->obfd, sect);
623 lower_offset = addrs->other[i].addr;
624 /* This is the index used by BFD. */
625 addrs->other[i].sectindex = sect->index ;
629 warning ("section %s not found in %s",
630 addrs->other[i].name,
632 addrs->other[i].addr = 0;
636 addrs->other[i].addr = lower_offset;
640 /* Initialize symbol reading routines for this objfile, allow complaints to
641 appear for this new file, and record how verbose to be, then do the
642 initial symbol reading for this file. */
644 (*objfile->sf->sym_init) (objfile);
645 clear_complaints (&symfile_complaints, 1, verbo);
648 (*objfile->sf->sym_offsets) (objfile, addrs);
651 size_t size = SIZEOF_N_SECTION_OFFSETS (num_offsets);
653 /* Just copy in the offset table directly as given to us. */
654 objfile->num_sections = num_offsets;
655 objfile->section_offsets
656 = ((struct section_offsets *)
657 obstack_alloc (&objfile->objfile_obstack, size));
658 memcpy (objfile->section_offsets, offsets, size);
660 init_objfile_sect_indices (objfile);
663 #ifndef DEPRECATED_IBM6000_TARGET
664 /* This is a SVR4/SunOS specific hack, I think. In any event, it
665 screws RS/6000. sym_offsets should be doing this sort of thing,
666 because it knows the mapping between bfd sections and
668 /* This is a hack. As far as I can tell, section offsets are not
669 target dependent. They are all set to addr with a couple of
670 exceptions. The exceptions are sysvr4 shared libraries, whose
671 offsets are kept in solib structures anyway and rs6000 xcoff
672 which handles shared libraries in a completely unique way.
674 Section offsets are built similarly, except that they are built
675 by adding addr in all cases because there is no clear mapping
676 from section_offsets into actual sections. Note that solib.c
677 has a different algorithm for finding section offsets.
679 These should probably all be collapsed into some target
680 independent form of shared library support. FIXME. */
684 struct obj_section *s;
686 /* Map section offsets in "addr" back to the object's
687 sections by comparing the section names with bfd's
688 section names. Then adjust the section address by
689 the offset. */ /* for gdb/13815 */
691 ALL_OBJFILE_OSECTIONS (objfile, s)
693 CORE_ADDR s_addr = 0;
697 !s_addr && i < addrs->num_sections && addrs->other[i].name;
699 if (strcmp (bfd_section_name (s->objfile->obfd,
701 addrs->other[i].name) == 0)
702 s_addr = addrs->other[i].addr; /* end added for gdb/13815 */
704 s->addr -= s->offset;
706 s->endaddr -= s->offset;
707 s->endaddr += s_addr;
711 #endif /* not DEPRECATED_IBM6000_TARGET */
713 (*objfile->sf->sym_read) (objfile, mainline);
715 /* Don't allow char * to have a typename (else would get caddr_t).
716 Ditto void *. FIXME: Check whether this is now done by all the
717 symbol readers themselves (many of them now do), and if so remove
720 TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0;
721 TYPE_NAME (lookup_pointer_type (builtin_type_void)) = 0;
723 /* Mark the objfile has having had initial symbol read attempted. Note
724 that this does not mean we found any symbols... */
726 objfile->flags |= OBJF_SYMS;
728 /* Discard cleanups as symbol reading was successful. */
730 discard_cleanups (old_chain);
733 /* Perform required actions after either reading in the initial
734 symbols for a new objfile, or mapping in the symbols from a reusable
738 new_symfile_objfile (struct objfile *objfile, int mainline, int verbo)
741 /* If this is the main symbol file we have to clean up all users of the
742 old main symbol file. Otherwise it is sufficient to fixup all the
743 breakpoints that may have been redefined by this symbol file. */
746 /* OK, make it the "real" symbol file. */
747 symfile_objfile = objfile;
749 clear_symtab_users ();
753 breakpoint_re_set ();
756 /* We're done reading the symbol file; finish off complaints. */
757 clear_complaints (&symfile_complaints, 0, verbo);
760 /* Process a symbol file, as either the main file or as a dynamically
763 ABFD is a BFD already open on the file, as from symfile_bfd_open.
764 This BFD will be closed on error, and is always consumed by this function.
766 FROM_TTY says how verbose to be.
768 MAINLINE specifies whether this is the main symbol file, or whether
769 it's an extra symbol file such as dynamically loaded code.
771 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
772 syms_from_objfile, above. ADDRS is ignored when MAINLINE is
775 Upon success, returns a pointer to the objfile that was added.
776 Upon failure, jumps back to command level (never returns). */
777 static struct objfile *
778 symbol_file_add_with_addrs_or_offsets (bfd *abfd, int from_tty,
779 struct section_addr_info *addrs,
780 struct section_offsets *offsets,
782 int mainline, int flags)
784 struct objfile *objfile;
785 struct partial_symtab *psymtab;
787 struct section_addr_info *orig_addrs;
788 struct cleanup *my_cleanups;
789 const char *name = bfd_get_filename (abfd);
791 my_cleanups = make_cleanup_bfd_close (abfd);
793 /* Give user a chance to burp if we'd be
794 interactively wiping out any existing symbols. */
796 if ((have_full_symbols () || have_partial_symbols ())
799 && !query ("Load new symbol table from \"%s\"? ", name))
800 error ("Not confirmed.");
802 objfile = allocate_objfile (abfd, flags);
803 discard_cleanups (my_cleanups);
805 orig_addrs = alloc_section_addr_info (bfd_count_sections (abfd));
806 my_cleanups = make_cleanup (xfree, orig_addrs);
810 orig_addrs->num_sections = addrs->num_sections;
811 for (i = 0; i < addrs->num_sections; i++)
812 orig_addrs->other[i] = addrs->other[i];
815 /* We either created a new mapped symbol table, mapped an existing
816 symbol table file which has not had initial symbol reading
817 performed, or need to read an unmapped symbol table. */
818 if (from_tty || info_verbose)
820 if (pre_add_symbol_hook)
821 pre_add_symbol_hook (name);
824 printf_unfiltered ("Reading symbols from %s...", name);
826 gdb_flush (gdb_stdout);
829 syms_from_objfile (objfile, addrs, offsets, num_offsets,
832 /* We now have at least a partial symbol table. Check to see if the
833 user requested that all symbols be read on initial access via either
834 the gdb startup command line or on a per symbol file basis. Expand
835 all partial symbol tables for this objfile if so. */
837 if ((flags & OBJF_READNOW) || readnow_symbol_files)
839 if (from_tty || info_verbose)
841 printf_unfiltered ("expanding to full symbols...");
843 gdb_flush (gdb_stdout);
846 for (psymtab = objfile->psymtabs;
848 psymtab = psymtab->next)
850 psymtab_to_symtab (psymtab);
854 debugfile = find_separate_debug_file (objfile);
859 objfile->separate_debug_objfile
860 = symbol_file_add (debugfile, from_tty, orig_addrs, 0, flags);
864 objfile->separate_debug_objfile
865 = symbol_file_add (debugfile, from_tty, NULL, 0, flags);
867 objfile->separate_debug_objfile->separate_debug_objfile_backlink
870 /* Put the separate debug object before the normal one, this is so that
871 usage of the ALL_OBJFILES_SAFE macro will stay safe. */
872 put_objfile_before (objfile->separate_debug_objfile, objfile);
877 if (!have_partial_symbols () && !have_full_symbols ())
880 printf_unfiltered ("(no debugging symbols found)...");
884 if (from_tty || info_verbose)
886 if (post_add_symbol_hook)
887 post_add_symbol_hook ();
890 printf_unfiltered ("done.\n");
894 /* We print some messages regardless of whether 'from_tty ||
895 info_verbose' is true, so make sure they go out at the right
897 gdb_flush (gdb_stdout);
899 do_cleanups (my_cleanups);
901 if (objfile->sf == NULL)
902 return objfile; /* No symbols. */
904 new_symfile_objfile (objfile, mainline, from_tty);
906 if (target_new_objfile_hook)
907 target_new_objfile_hook (objfile);
913 /* Process a symbol file, as either the main file or as a dynamically
914 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
917 symbol_file_add (char *name, int from_tty, struct section_addr_info *addrs,
918 int mainline, int flags)
920 return symbol_file_add_with_addrs_or_offsets (symfile_bfd_open (name),
921 from_tty, addrs, 0, 0,
926 /* Call symbol_file_add() with default values and update whatever is
927 affected by the loading of a new main().
928 Used when the file is supplied in the gdb command line
929 and by some targets with special loading requirements.
930 The auxiliary function, symbol_file_add_main_1(), has the flags
931 argument for the switches that can only be specified in the symbol_file
935 symbol_file_add_main (char *args, int from_tty)
937 symbol_file_add_main_1 (args, from_tty, 0);
941 symbol_file_add_main_1 (char *args, int from_tty, int flags)
943 symbol_file_add (args, from_tty, NULL, 1, flags);
946 RESET_HP_UX_GLOBALS ();
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");
978 RESET_HP_UX_GLOBALS ();
983 get_debug_link_info (struct objfile *objfile, unsigned long *crc32_out)
986 bfd_size_type debuglink_size;
992 sect = bfd_get_section_by_name (objfile->obfd, ".gnu_debuglink");
997 debuglink_size = bfd_section_size (objfile->obfd, sect);
999 contents = xmalloc (debuglink_size);
1000 bfd_get_section_contents (objfile->obfd, sect, contents,
1001 (file_ptr)0, (bfd_size_type)debuglink_size);
1003 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1004 crc_offset = strlen (contents) + 1;
1005 crc_offset = (crc_offset + 3) & ~3;
1007 crc32 = bfd_get_32 (objfile->obfd, (bfd_byte *) (contents + crc_offset));
1014 separate_debug_file_exists (const char *name, unsigned long crc)
1016 unsigned long file_crc = 0;
1018 char buffer[8*1024];
1021 fd = open (name, O_RDONLY | O_BINARY);
1025 while ((count = read (fd, buffer, sizeof (buffer))) > 0)
1026 file_crc = gnu_debuglink_crc32 (file_crc, buffer, count);
1030 return crc == file_crc;
1033 static char *debug_file_directory = NULL;
1035 #if ! defined (DEBUG_SUBDIRECTORY)
1036 #define DEBUG_SUBDIRECTORY ".debug"
1040 find_separate_debug_file (struct objfile *objfile)
1047 bfd_size_type debuglink_size;
1048 unsigned long crc32;
1051 basename = get_debug_link_info (objfile, &crc32);
1053 if (basename == NULL)
1056 dir = xstrdup (objfile->name);
1058 /* Strip off the final filename part, leaving the directory name,
1059 followed by a slash. Objfile names should always be absolute and
1060 tilde-expanded, so there should always be a slash in there
1062 for (i = strlen(dir) - 1; i >= 0; i--)
1064 if (IS_DIR_SEPARATOR (dir[i]))
1067 gdb_assert (i >= 0 && IS_DIR_SEPARATOR (dir[i]));
1070 debugfile = alloca (strlen (debug_file_directory) + 1
1072 + strlen (DEBUG_SUBDIRECTORY)
1077 /* First try in the same directory as the original file. */
1078 strcpy (debugfile, dir);
1079 strcat (debugfile, basename);
1081 if (separate_debug_file_exists (debugfile, crc32))
1085 return xstrdup (debugfile);
1088 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1089 strcpy (debugfile, dir);
1090 strcat (debugfile, DEBUG_SUBDIRECTORY);
1091 strcat (debugfile, "/");
1092 strcat (debugfile, basename);
1094 if (separate_debug_file_exists (debugfile, crc32))
1098 return xstrdup (debugfile);
1101 /* Then try in the global debugfile directory. */
1102 strcpy (debugfile, debug_file_directory);
1103 strcat (debugfile, "/");
1104 strcat (debugfile, dir);
1105 strcat (debugfile, basename);
1107 if (separate_debug_file_exists (debugfile, crc32))
1111 return xstrdup (debugfile);
1120 /* This is the symbol-file command. Read the file, analyze its
1121 symbols, and add a struct symtab to a symtab list. The syntax of
1122 the command is rather bizarre--(1) buildargv implements various
1123 quoting conventions which are undocumented and have little or
1124 nothing in common with the way things are quoted (or not quoted)
1125 elsewhere in GDB, (2) options are used, which are not generally
1126 used in GDB (perhaps "set mapped on", "set readnow on" would be
1127 better), (3) the order of options matters, which is contrary to GNU
1128 conventions (because it is confusing and inconvenient). */
1129 /* Note: ezannoni 2000-04-17. This function used to have support for
1130 rombug (see remote-os9k.c). It consisted of a call to target_link()
1131 (target.c) to get the address of the text segment from the target,
1132 and pass that to symbol_file_add(). This is no longer supported. */
1135 symbol_file_command (char *args, int from_tty)
1139 struct cleanup *cleanups;
1140 int flags = OBJF_USERLOADED;
1146 symbol_file_clear (from_tty);
1150 if ((argv = buildargv (args)) == NULL)
1154 cleanups = make_cleanup_freeargv (argv);
1155 while (*argv != NULL)
1157 if (strcmp (*argv, "-readnow") == 0)
1158 flags |= OBJF_READNOW;
1159 else if (**argv == '-')
1160 error ("unknown option `%s'", *argv);
1165 symbol_file_add_main_1 (name, from_tty, flags);
1172 error ("no symbol file name was specified");
1174 do_cleanups (cleanups);
1178 /* Set the initial language.
1180 A better solution would be to record the language in the psymtab when reading
1181 partial symbols, and then use it (if known) to set the language. This would
1182 be a win for formats that encode the language in an easily discoverable place,
1183 such as DWARF. For stabs, we can jump through hoops looking for specially
1184 named symbols or try to intuit the language from the specific type of stabs
1185 we find, but we can't do that until later when we read in full symbols.
1189 set_initial_language (void)
1191 struct partial_symtab *pst;
1192 enum language lang = language_unknown;
1194 pst = find_main_psymtab ();
1197 if (pst->filename != NULL)
1199 lang = deduce_language_from_filename (pst->filename);
1201 if (lang == language_unknown)
1203 /* Make C the default language */
1206 set_language (lang);
1207 expected_language = current_language; /* Don't warn the user */
1211 /* Open file specified by NAME and hand it off to BFD for preliminary
1212 analysis. Result is a newly initialized bfd *, which includes a newly
1213 malloc'd` copy of NAME (tilde-expanded and made absolute).
1214 In case of trouble, error() is called. */
1217 symfile_bfd_open (char *name)
1221 char *absolute_name;
1225 name = tilde_expand (name); /* Returns 1st new malloc'd copy */
1227 /* Look down path for it, allocate 2nd new malloc'd copy. */
1228 desc = openp (getenv ("PATH"), 1, name, O_RDONLY | O_BINARY, 0, &absolute_name);
1229 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1232 char *exename = alloca (strlen (name) + 5);
1233 strcat (strcpy (exename, name), ".exe");
1234 desc = openp (getenv ("PATH"), 1, exename, O_RDONLY | O_BINARY,
1240 make_cleanup (xfree, name);
1241 perror_with_name (name);
1243 xfree (name); /* Free 1st new malloc'd copy */
1244 name = absolute_name; /* Keep 2nd malloc'd copy in bfd */
1245 /* It'll be freed in free_objfile(). */
1247 sym_bfd = bfd_fdopenr (name, gnutarget, desc);
1251 make_cleanup (xfree, name);
1252 error ("\"%s\": can't open to read symbols: %s.", name,
1253 bfd_errmsg (bfd_get_error ()));
1255 bfd_set_cacheable (sym_bfd, 1);
1257 if (!bfd_check_format (sym_bfd, bfd_object))
1259 /* FIXME: should be checking for errors from bfd_close (for one thing,
1260 on error it does not free all the storage associated with the
1262 bfd_close (sym_bfd); /* This also closes desc */
1263 make_cleanup (xfree, name);
1264 error ("\"%s\": can't read symbols: %s.", name,
1265 bfd_errmsg (bfd_get_error ()));
1270 /* Return the section index for the given section name. Return -1 if
1271 the section was not found. */
1273 get_section_index (struct objfile *objfile, char *section_name)
1275 asection *sect = bfd_get_section_by_name (objfile->obfd, section_name);
1282 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1283 startup by the _initialize routine in each object file format reader,
1284 to register information about each format the the reader is prepared
1288 add_symtab_fns (struct sym_fns *sf)
1290 sf->next = symtab_fns;
1295 /* Initialize to read symbols from the symbol file sym_bfd. It either
1296 returns or calls error(). The result is an initialized struct sym_fns
1297 in the objfile structure, that contains cached information about the
1301 find_sym_fns (struct objfile *objfile)
1304 enum bfd_flavour our_flavour = bfd_get_flavour (objfile->obfd);
1305 char *our_target = bfd_get_target (objfile->obfd);
1307 if (our_flavour == bfd_target_srec_flavour
1308 || our_flavour == bfd_target_ihex_flavour
1309 || our_flavour == bfd_target_tekhex_flavour)
1310 return; /* No symbols. */
1312 for (sf = symtab_fns; sf != NULL; sf = sf->next)
1314 if (our_flavour == sf->sym_flavour)
1320 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
1321 bfd_get_target (objfile->obfd));
1324 /* This function runs the load command of our current target. */
1327 load_command (char *arg, int from_tty)
1330 arg = get_exec_file (1);
1331 target_load (arg, from_tty);
1333 /* After re-loading the executable, we don't really know which
1334 overlays are mapped any more. */
1335 overlay_cache_invalid = 1;
1338 /* This version of "load" should be usable for any target. Currently
1339 it is just used for remote targets, not inftarg.c or core files,
1340 on the theory that only in that case is it useful.
1342 Avoiding xmodem and the like seems like a win (a) because we don't have
1343 to worry about finding it, and (b) On VMS, fork() is very slow and so
1344 we don't want to run a subprocess. On the other hand, I'm not sure how
1345 performance compares. */
1347 static int download_write_size = 512;
1348 static int validate_download = 0;
1350 /* Callback service function for generic_load (bfd_map_over_sections). */
1353 add_section_size_callback (bfd *abfd, asection *asec, void *data)
1355 bfd_size_type *sum = data;
1357 *sum += bfd_get_section_size_before_reloc (asec);
1360 /* Opaque data for load_section_callback. */
1361 struct load_section_data {
1362 unsigned long load_offset;
1363 unsigned long write_count;
1364 unsigned long data_count;
1365 bfd_size_type total_size;
1368 /* Callback service function for generic_load (bfd_map_over_sections). */
1371 load_section_callback (bfd *abfd, asection *asec, void *data)
1373 struct load_section_data *args = data;
1375 if (bfd_get_section_flags (abfd, asec) & SEC_LOAD)
1377 bfd_size_type size = bfd_get_section_size_before_reloc (asec);
1381 struct cleanup *old_chain;
1382 CORE_ADDR lma = bfd_section_lma (abfd, asec) + args->load_offset;
1383 bfd_size_type block_size;
1385 const char *sect_name = bfd_get_section_name (abfd, asec);
1388 if (download_write_size > 0 && size > download_write_size)
1389 block_size = download_write_size;
1393 buffer = xmalloc (size);
1394 old_chain = make_cleanup (xfree, buffer);
1396 /* Is this really necessary? I guess it gives the user something
1397 to look at during a long download. */
1398 ui_out_message (uiout, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1399 sect_name, paddr_nz (size), paddr_nz (lma));
1401 bfd_get_section_contents (abfd, asec, buffer, 0, size);
1407 bfd_size_type this_transfer = size - sent;
1409 if (this_transfer >= block_size)
1410 this_transfer = block_size;
1411 len = target_write_memory_partial (lma, buffer,
1412 this_transfer, &err);
1415 if (validate_download)
1417 /* Broken memories and broken monitors manifest
1418 themselves here when bring new computers to
1419 life. This doubles already slow downloads. */
1420 /* NOTE: cagney/1999-10-18: A more efficient
1421 implementation might add a verify_memory()
1422 method to the target vector and then use
1423 that. remote.c could implement that method
1424 using the ``qCRC'' packet. */
1425 char *check = xmalloc (len);
1426 struct cleanup *verify_cleanups =
1427 make_cleanup (xfree, check);
1429 if (target_read_memory (lma, check, len) != 0)
1430 error ("Download verify read failed at 0x%s",
1432 if (memcmp (buffer, check, len) != 0)
1433 error ("Download verify compare failed at 0x%s",
1435 do_cleanups (verify_cleanups);
1437 args->data_count += len;
1440 args->write_count += 1;
1443 || (ui_load_progress_hook != NULL
1444 && ui_load_progress_hook (sect_name, sent)))
1445 error ("Canceled the download");
1447 if (show_load_progress != NULL)
1448 show_load_progress (sect_name, sent, size,
1449 args->data_count, args->total_size);
1451 while (sent < size);
1454 error ("Memory access error while loading section %s.", sect_name);
1456 do_cleanups (old_chain);
1462 generic_load (char *args, int from_tty)
1466 time_t start_time, end_time; /* Start and end times of download */
1468 struct cleanup *old_cleanups;
1470 struct load_section_data cbdata;
1473 cbdata.load_offset = 0; /* Offset to add to vma for each section. */
1474 cbdata.write_count = 0; /* Number of writes needed. */
1475 cbdata.data_count = 0; /* Number of bytes written to target memory. */
1476 cbdata.total_size = 0; /* Total size of all bfd sectors. */
1478 /* Parse the input argument - the user can specify a load offset as
1479 a second argument. */
1480 filename = xmalloc (strlen (args) + 1);
1481 old_cleanups = make_cleanup (xfree, filename);
1482 strcpy (filename, args);
1483 offptr = strchr (filename, ' ');
1488 cbdata.load_offset = strtoul (offptr, &endptr, 0);
1489 if (offptr == endptr)
1490 error ("Invalid download offset:%s\n", offptr);
1494 cbdata.load_offset = 0;
1496 /* Open the file for loading. */
1497 loadfile_bfd = bfd_openr (filename, gnutarget);
1498 if (loadfile_bfd == NULL)
1500 perror_with_name (filename);
1504 /* FIXME: should be checking for errors from bfd_close (for one thing,
1505 on error it does not free all the storage associated with the
1507 make_cleanup_bfd_close (loadfile_bfd);
1509 if (!bfd_check_format (loadfile_bfd, bfd_object))
1511 error ("\"%s\" is not an object file: %s", filename,
1512 bfd_errmsg (bfd_get_error ()));
1515 bfd_map_over_sections (loadfile_bfd, add_section_size_callback,
1516 (void *) &cbdata.total_size);
1518 start_time = time (NULL);
1520 bfd_map_over_sections (loadfile_bfd, load_section_callback, &cbdata);
1522 end_time = time (NULL);
1524 entry = bfd_get_start_address (loadfile_bfd);
1525 ui_out_text (uiout, "Start address ");
1526 ui_out_field_fmt (uiout, "address", "0x%s", paddr_nz (entry));
1527 ui_out_text (uiout, ", load size ");
1528 ui_out_field_fmt (uiout, "load-size", "%lu", cbdata.data_count);
1529 ui_out_text (uiout, "\n");
1530 /* We were doing this in remote-mips.c, I suspect it is right
1531 for other targets too. */
1534 /* FIXME: are we supposed to call symbol_file_add or not? According
1535 to a comment from remote-mips.c (where a call to symbol_file_add
1536 was commented out), making the call confuses GDB if more than one
1537 file is loaded in. Some targets do (e.g., remote-vx.c) but
1538 others don't (or didn't - perhaphs they have all been deleted). */
1540 print_transfer_performance (gdb_stdout, cbdata.data_count,
1541 cbdata.write_count, end_time - start_time);
1543 do_cleanups (old_cleanups);
1546 /* Report how fast the transfer went. */
1548 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1549 replaced by print_transfer_performance (with a very different
1550 function signature). */
1553 report_transfer_performance (unsigned long data_count, time_t start_time,
1556 print_transfer_performance (gdb_stdout, data_count,
1557 end_time - start_time, 0);
1561 print_transfer_performance (struct ui_file *stream,
1562 unsigned long data_count,
1563 unsigned long write_count,
1564 unsigned long time_count)
1566 ui_out_text (uiout, "Transfer rate: ");
1569 ui_out_field_fmt (uiout, "transfer-rate", "%lu",
1570 (data_count * 8) / time_count);
1571 ui_out_text (uiout, " bits/sec");
1575 ui_out_field_fmt (uiout, "transferred-bits", "%lu", (data_count * 8));
1576 ui_out_text (uiout, " bits in <1 sec");
1578 if (write_count > 0)
1580 ui_out_text (uiout, ", ");
1581 ui_out_field_fmt (uiout, "write-rate", "%lu", data_count / write_count);
1582 ui_out_text (uiout, " bytes/write");
1584 ui_out_text (uiout, ".\n");
1587 /* This function allows the addition of incrementally linked object files.
1588 It does not modify any state in the target, only in the debugger. */
1589 /* Note: ezannoni 2000-04-13 This function/command used to have a
1590 special case syntax for the rombug target (Rombug is the boot
1591 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
1592 rombug case, the user doesn't need to supply a text address,
1593 instead a call to target_link() (in target.c) would supply the
1594 value to use. We are now discontinuing this type of ad hoc syntax. */
1597 add_symbol_file_command (char *args, int from_tty)
1599 char *filename = NULL;
1600 int flags = OBJF_USERLOADED;
1602 int expecting_option = 0;
1603 int section_index = 0;
1607 int expecting_sec_name = 0;
1608 int expecting_sec_addr = 0;
1616 struct section_addr_info *section_addrs;
1617 struct sect_opt *sect_opts = NULL;
1618 size_t num_sect_opts = 0;
1619 struct cleanup *my_cleanups = make_cleanup (null_cleanup, NULL);
1622 sect_opts = (struct sect_opt *) xmalloc (num_sect_opts
1623 * sizeof (struct sect_opt));
1628 error ("add-symbol-file takes a file name and an address");
1630 /* Make a copy of the string that we can safely write into. */
1631 args = xstrdup (args);
1633 while (*args != '\000')
1635 /* Any leading spaces? */
1636 while (isspace (*args))
1639 /* Point arg to the beginning of the argument. */
1642 /* Move args pointer over the argument. */
1643 while ((*args != '\000') && !isspace (*args))
1646 /* If there are more arguments, terminate arg and
1648 if (*args != '\000')
1651 /* Now process the argument. */
1654 /* The first argument is the file name. */
1655 filename = tilde_expand (arg);
1656 make_cleanup (xfree, filename);
1661 /* The second argument is always the text address at which
1662 to load the program. */
1663 sect_opts[section_index].name = ".text";
1664 sect_opts[section_index].value = arg;
1665 if (++section_index > num_sect_opts)
1668 sect_opts = ((struct sect_opt *)
1669 xrealloc (sect_opts,
1671 * sizeof (struct sect_opt)));
1676 /* It's an option (starting with '-') or it's an argument
1681 if (strcmp (arg, "-readnow") == 0)
1682 flags |= OBJF_READNOW;
1683 else if (strcmp (arg, "-s") == 0)
1685 expecting_sec_name = 1;
1686 expecting_sec_addr = 1;
1691 if (expecting_sec_name)
1693 sect_opts[section_index].name = arg;
1694 expecting_sec_name = 0;
1697 if (expecting_sec_addr)
1699 sect_opts[section_index].value = arg;
1700 expecting_sec_addr = 0;
1701 if (++section_index > num_sect_opts)
1704 sect_opts = ((struct sect_opt *)
1705 xrealloc (sect_opts,
1707 * sizeof (struct sect_opt)));
1711 error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*");
1717 /* Print the prompt for the query below. And save the arguments into
1718 a sect_addr_info structure to be passed around to other
1719 functions. We have to split this up into separate print
1720 statements because local_hex_string returns a local static
1723 printf_unfiltered ("add symbol table from file \"%s\" at\n", filename);
1724 section_addrs = alloc_section_addr_info (section_index);
1725 make_cleanup (xfree, section_addrs);
1726 for (i = 0; i < section_index; i++)
1729 char *val = sect_opts[i].value;
1730 char *sec = sect_opts[i].name;
1732 addr = parse_and_eval_address (val);
1734 /* Here we store the section offsets in the order they were
1735 entered on the command line. */
1736 section_addrs->other[sec_num].name = sec;
1737 section_addrs->other[sec_num].addr = addr;
1738 printf_unfiltered ("\t%s_addr = %s\n",
1740 local_hex_string ((unsigned long)addr));
1743 /* The object's sections are initialized when a
1744 call is made to build_objfile_section_table (objfile).
1745 This happens in reread_symbols.
1746 At this point, we don't know what file type this is,
1747 so we can't determine what section names are valid. */
1750 if (from_tty && (!query ("%s", "")))
1751 error ("Not confirmed.");
1753 symbol_file_add (filename, from_tty, section_addrs, 0, flags);
1755 /* Getting new symbols may change our opinion about what is
1757 reinit_frame_cache ();
1758 do_cleanups (my_cleanups);
1762 add_shared_symbol_files_command (char *args, int from_tty)
1764 #ifdef ADD_SHARED_SYMBOL_FILES
1765 ADD_SHARED_SYMBOL_FILES (args, from_tty);
1767 error ("This command is not available in this configuration of GDB.");
1772 /* Read inferior memory at ADDR to find the header of a loaded object file
1773 and read its in-core symbols out of inferior memory. TEMPL is a bfd
1774 representing the target's format. */
1776 symbol_file_add_from_memory (bfd *templ, CORE_ADDR addr, int from_tty)
1778 struct objfile *objf;
1782 struct section_addr_info *sai;
1785 if (bfd_get_flavour (templ) != bfd_target_elf_flavour)
1786 error ("add-symbol-file-from-memory not supported for this target");
1788 nbfd = bfd_elf_bfd_from_remote_memory (templ, addr, &loadbase,
1789 target_read_memory);
1792 error ("Failed to read a valid object file image from memory.");
1796 nbfd->filename = xstrdup ("shared object read from target memory");
1798 if (!bfd_check_format (nbfd, bfd_object))
1800 /* FIXME: should be checking for errors from bfd_close (for one thing,
1801 on error it does not free all the storage associated with the
1804 error ("Got object file from memory but can't read symbols: %s.",
1805 bfd_errmsg (bfd_get_error ()));
1809 sai = alloc_section_addr_info (bfd_count_sections (nbfd));
1810 make_cleanup (xfree, sai);
1812 for (sec = nbfd->sections; sec != NULL; sec = sec->next)
1813 if ((bfd_get_section_flags (nbfd, sec) & (SEC_ALLOC|SEC_LOAD)) != 0)
1815 sai->other[i].addr = bfd_get_section_vma (nbfd, sec) + loadbase;
1816 sai->other[i].name = (char *) bfd_get_section_name (nbfd, sec);
1817 sai->other[i].sectindex = sec->index;
1821 objf = symbol_file_add_with_addrs_or_offsets (nbfd, from_tty,
1822 sai, NULL, 0, 0, OBJF_SHARED);
1824 /* This might change our ideas about frames already looked at. */
1825 reinit_frame_cache ();
1832 add_symbol_file_from_memory_command (char *args, int from_tty)
1839 error ("add-symbol-file-from-memory requires an expression argument");
1841 addr = parse_and_eval_address (args);
1843 /* We need some representative bfd to know the target we are looking at. */
1844 if (symfile_objfile != NULL)
1845 templ = symfile_objfile->obfd;
1850 Must use symbol-file or exec-file before add-symbol-file-from-memory.");
1852 symbol_file_add_from_memory (templ, addr, from_tty);
1854 error ("add-symbol-file-from-memory not implemented");
1858 /* Re-read symbols if a symbol-file has changed. */
1860 reread_symbols (void)
1862 struct objfile *objfile;
1865 struct stat new_statbuf;
1868 /* With the addition of shared libraries, this should be modified,
1869 the load time should be saved in the partial symbol tables, since
1870 different tables may come from different source files. FIXME.
1871 This routine should then walk down each partial symbol table
1872 and see if the symbol table that it originates from has been changed */
1874 for (objfile = object_files; objfile; objfile = objfile->next)
1878 #ifdef DEPRECATED_IBM6000_TARGET
1879 /* If this object is from a shared library, then you should
1880 stat on the library name, not member name. */
1882 if (objfile->obfd->my_archive)
1883 res = stat (objfile->obfd->my_archive->filename, &new_statbuf);
1886 res = stat (objfile->name, &new_statbuf);
1889 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1890 printf_unfiltered ("`%s' has disappeared; keeping its symbols.\n",
1894 new_modtime = new_statbuf.st_mtime;
1895 if (new_modtime != objfile->mtime)
1897 struct cleanup *old_cleanups;
1898 struct section_offsets *offsets;
1900 char *obfd_filename;
1902 printf_unfiltered ("`%s' has changed; re-reading symbols.\n",
1905 /* There are various functions like symbol_file_add,
1906 symfile_bfd_open, syms_from_objfile, etc., which might
1907 appear to do what we want. But they have various other
1908 effects which we *don't* want. So we just do stuff
1909 ourselves. We don't worry about mapped files (for one thing,
1910 any mapped file will be out of date). */
1912 /* If we get an error, blow away this objfile (not sure if
1913 that is the correct response for things like shared
1915 old_cleanups = make_cleanup_free_objfile (objfile);
1916 /* We need to do this whenever any symbols go away. */
1917 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
1919 /* Clean up any state BFD has sitting around. We don't need
1920 to close the descriptor but BFD lacks a way of closing the
1921 BFD without closing the descriptor. */
1922 obfd_filename = bfd_get_filename (objfile->obfd);
1923 if (!bfd_close (objfile->obfd))
1924 error ("Can't close BFD for %s: %s", objfile->name,
1925 bfd_errmsg (bfd_get_error ()));
1926 objfile->obfd = bfd_openr (obfd_filename, gnutarget);
1927 if (objfile->obfd == NULL)
1928 error ("Can't open %s to read symbols.", objfile->name);
1929 /* bfd_openr sets cacheable to true, which is what we want. */
1930 if (!bfd_check_format (objfile->obfd, bfd_object))
1931 error ("Can't read symbols from %s: %s.", objfile->name,
1932 bfd_errmsg (bfd_get_error ()));
1934 /* Save the offsets, we will nuke them with the rest of the
1936 num_offsets = objfile->num_sections;
1937 offsets = ((struct section_offsets *)
1938 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets)));
1939 memcpy (offsets, objfile->section_offsets,
1940 SIZEOF_N_SECTION_OFFSETS (num_offsets));
1942 /* Nuke all the state that we will re-read. Much of the following
1943 code which sets things to NULL really is necessary to tell
1944 other parts of GDB that there is nothing currently there. */
1946 /* FIXME: Do we have to free a whole linked list, or is this
1948 if (objfile->global_psymbols.list)
1949 xmfree (objfile->md, objfile->global_psymbols.list);
1950 memset (&objfile->global_psymbols, 0,
1951 sizeof (objfile->global_psymbols));
1952 if (objfile->static_psymbols.list)
1953 xmfree (objfile->md, objfile->static_psymbols.list);
1954 memset (&objfile->static_psymbols, 0,
1955 sizeof (objfile->static_psymbols));
1957 /* Free the obstacks for non-reusable objfiles */
1958 bcache_xfree (objfile->psymbol_cache);
1959 objfile->psymbol_cache = bcache_xmalloc ();
1960 bcache_xfree (objfile->macro_cache);
1961 objfile->macro_cache = bcache_xmalloc ();
1962 if (objfile->demangled_names_hash != NULL)
1964 htab_delete (objfile->demangled_names_hash);
1965 objfile->demangled_names_hash = NULL;
1967 obstack_free (&objfile->objfile_obstack, 0);
1968 objfile->sections = NULL;
1969 objfile->symtabs = NULL;
1970 objfile->psymtabs = NULL;
1971 objfile->free_psymtabs = NULL;
1972 objfile->cp_namespace_symtab = NULL;
1973 objfile->msymbols = NULL;
1974 objfile->sym_private = NULL;
1975 objfile->minimal_symbol_count = 0;
1976 memset (&objfile->msymbol_hash, 0,
1977 sizeof (objfile->msymbol_hash));
1978 memset (&objfile->msymbol_demangled_hash, 0,
1979 sizeof (objfile->msymbol_demangled_hash));
1980 objfile->fundamental_types = NULL;
1981 clear_objfile_data (objfile);
1982 if (objfile->sf != NULL)
1984 (*objfile->sf->sym_finish) (objfile);
1987 /* We never make this a mapped file. */
1989 objfile->psymbol_cache = bcache_xmalloc ();
1990 objfile->macro_cache = bcache_xmalloc ();
1991 /* obstack_init also initializes the obstack so it is
1992 empty. We could use obstack_specify_allocation but
1993 gdb_obstack.h specifies the alloc/dealloc
1995 obstack_init (&objfile->objfile_obstack);
1996 if (build_objfile_section_table (objfile))
1998 error ("Can't find the file sections in `%s': %s",
1999 objfile->name, bfd_errmsg (bfd_get_error ()));
2001 terminate_minimal_symbol_table (objfile);
2003 /* We use the same section offsets as from last time. I'm not
2004 sure whether that is always correct for shared libraries. */
2005 objfile->section_offsets = (struct section_offsets *)
2006 obstack_alloc (&objfile->objfile_obstack,
2007 SIZEOF_N_SECTION_OFFSETS (num_offsets));
2008 memcpy (objfile->section_offsets, offsets,
2009 SIZEOF_N_SECTION_OFFSETS (num_offsets));
2010 objfile->num_sections = num_offsets;
2012 /* What the hell is sym_new_init for, anyway? The concept of
2013 distinguishing between the main file and additional files
2014 in this way seems rather dubious. */
2015 if (objfile == symfile_objfile)
2017 (*objfile->sf->sym_new_init) (objfile);
2019 RESET_HP_UX_GLOBALS ();
2023 (*objfile->sf->sym_init) (objfile);
2024 clear_complaints (&symfile_complaints, 1, 1);
2025 /* The "mainline" parameter is a hideous hack; I think leaving it
2026 zero is OK since dbxread.c also does what it needs to do if
2027 objfile->global_psymbols.size is 0. */
2028 (*objfile->sf->sym_read) (objfile, 0);
2029 if (!have_partial_symbols () && !have_full_symbols ())
2032 printf_unfiltered ("(no debugging symbols found)\n");
2035 objfile->flags |= OBJF_SYMS;
2037 /* We're done reading the symbol file; finish off complaints. */
2038 clear_complaints (&symfile_complaints, 0, 1);
2040 /* Getting new symbols may change our opinion about what is
2043 reinit_frame_cache ();
2045 /* Discard cleanups as symbol reading was successful. */
2046 discard_cleanups (old_cleanups);
2048 /* If the mtime has changed between the time we set new_modtime
2049 and now, we *want* this to be out of date, so don't call stat
2051 objfile->mtime = new_modtime;
2053 reread_separate_symbols (objfile);
2059 clear_symtab_users ();
2063 /* Handle separate debug info for OBJFILE, which has just been
2065 - If we had separate debug info before, but now we don't, get rid
2066 of the separated objfile.
2067 - If we didn't have separated debug info before, but now we do,
2068 read in the new separated debug info file.
2069 - If the debug link points to a different file, toss the old one
2070 and read the new one.
2071 This function does *not* handle the case where objfile is still
2072 using the same separate debug info file, but that file's timestamp
2073 has changed. That case should be handled by the loop in
2074 reread_symbols already. */
2076 reread_separate_symbols (struct objfile *objfile)
2079 unsigned long crc32;
2081 /* Does the updated objfile's debug info live in a
2083 debug_file = find_separate_debug_file (objfile);
2085 if (objfile->separate_debug_objfile)
2087 /* There are two cases where we need to get rid of
2088 the old separated debug info objfile:
2089 - if the new primary objfile doesn't have
2090 separated debug info, or
2091 - if the new primary objfile has separate debug
2092 info, but it's under a different filename.
2094 If the old and new objfiles both have separate
2095 debug info, under the same filename, then we're
2096 okay --- if the separated file's contents have
2097 changed, we will have caught that when we
2098 visited it in this function's outermost
2101 || strcmp (debug_file, objfile->separate_debug_objfile->name) != 0)
2102 free_objfile (objfile->separate_debug_objfile);
2105 /* If the new objfile has separate debug info, and we
2106 haven't loaded it already, do so now. */
2108 && ! objfile->separate_debug_objfile)
2110 /* Use the same section offset table as objfile itself.
2111 Preserve the flags from objfile that make sense. */
2112 objfile->separate_debug_objfile
2113 = (symbol_file_add_with_addrs_or_offsets
2114 (symfile_bfd_open (debug_file),
2115 info_verbose, /* from_tty: Don't override the default. */
2116 0, /* No addr table. */
2117 objfile->section_offsets, objfile->num_sections,
2118 0, /* Not mainline. See comments about this above. */
2119 objfile->flags & (OBJF_REORDERED | OBJF_SHARED | OBJF_READNOW
2120 | OBJF_USERLOADED)));
2121 objfile->separate_debug_objfile->separate_debug_objfile_backlink
2137 static filename_language *filename_language_table;
2138 static int fl_table_size, fl_table_next;
2141 add_filename_language (char *ext, enum language lang)
2143 if (fl_table_next >= fl_table_size)
2145 fl_table_size += 10;
2146 filename_language_table =
2147 xrealloc (filename_language_table,
2148 fl_table_size * sizeof (*filename_language_table));
2151 filename_language_table[fl_table_next].ext = xstrdup (ext);
2152 filename_language_table[fl_table_next].lang = lang;
2156 static char *ext_args;
2159 set_ext_lang_command (char *args, int from_tty)
2162 char *cp = ext_args;
2165 /* First arg is filename extension, starting with '.' */
2167 error ("'%s': Filename extension must begin with '.'", ext_args);
2169 /* Find end of first arg. */
2170 while (*cp && !isspace (*cp))
2174 error ("'%s': two arguments required -- filename extension and language",
2177 /* Null-terminate first arg */
2180 /* Find beginning of second arg, which should be a source language. */
2181 while (*cp && isspace (*cp))
2185 error ("'%s': two arguments required -- filename extension and language",
2188 /* Lookup the language from among those we know. */
2189 lang = language_enum (cp);
2191 /* Now lookup the filename extension: do we already know it? */
2192 for (i = 0; i < fl_table_next; i++)
2193 if (0 == strcmp (ext_args, filename_language_table[i].ext))
2196 if (i >= fl_table_next)
2198 /* new file extension */
2199 add_filename_language (ext_args, lang);
2203 /* redefining a previously known filename extension */
2206 /* query ("Really make files of type %s '%s'?", */
2207 /* ext_args, language_str (lang)); */
2209 xfree (filename_language_table[i].ext);
2210 filename_language_table[i].ext = xstrdup (ext_args);
2211 filename_language_table[i].lang = lang;
2216 info_ext_lang_command (char *args, int from_tty)
2220 printf_filtered ("Filename extensions and the languages they represent:");
2221 printf_filtered ("\n\n");
2222 for (i = 0; i < fl_table_next; i++)
2223 printf_filtered ("\t%s\t- %s\n",
2224 filename_language_table[i].ext,
2225 language_str (filename_language_table[i].lang));
2229 init_filename_language_table (void)
2231 if (fl_table_size == 0) /* protect against repetition */
2235 filename_language_table =
2236 xmalloc (fl_table_size * sizeof (*filename_language_table));
2237 add_filename_language (".c", language_c);
2238 add_filename_language (".C", language_cplus);
2239 add_filename_language (".cc", language_cplus);
2240 add_filename_language (".cp", language_cplus);
2241 add_filename_language (".cpp", language_cplus);
2242 add_filename_language (".cxx", language_cplus);
2243 add_filename_language (".c++", language_cplus);
2244 add_filename_language (".java", language_java);
2245 add_filename_language (".class", language_java);
2246 add_filename_language (".m", language_objc);
2247 add_filename_language (".f", language_fortran);
2248 add_filename_language (".F", language_fortran);
2249 add_filename_language (".s", language_asm);
2250 add_filename_language (".S", language_asm);
2251 add_filename_language (".pas", language_pascal);
2252 add_filename_language (".p", language_pascal);
2253 add_filename_language (".pp", language_pascal);
2258 deduce_language_from_filename (char *filename)
2263 if (filename != NULL)
2264 if ((cp = strrchr (filename, '.')) != NULL)
2265 for (i = 0; i < fl_table_next; i++)
2266 if (strcmp (cp, filename_language_table[i].ext) == 0)
2267 return filename_language_table[i].lang;
2269 return language_unknown;
2274 Allocate and partly initialize a new symbol table. Return a pointer
2275 to it. error() if no space.
2277 Caller must set these fields:
2283 possibly free_named_symtabs (symtab->filename);
2287 allocate_symtab (char *filename, struct objfile *objfile)
2289 struct symtab *symtab;
2291 symtab = (struct symtab *)
2292 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symtab));
2293 memset (symtab, 0, sizeof (*symtab));
2294 symtab->filename = obsavestring (filename, strlen (filename),
2295 &objfile->objfile_obstack);
2296 symtab->fullname = NULL;
2297 symtab->language = deduce_language_from_filename (filename);
2298 symtab->debugformat = obsavestring ("unknown", 7,
2299 &objfile->objfile_obstack);
2301 /* Hook it to the objfile it comes from */
2303 symtab->objfile = objfile;
2304 symtab->next = objfile->symtabs;
2305 objfile->symtabs = symtab;
2307 /* FIXME: This should go away. It is only defined for the Z8000,
2308 and the Z8000 definition of this macro doesn't have anything to
2309 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
2310 here for convenience. */
2311 #ifdef INIT_EXTRA_SYMTAB_INFO
2312 INIT_EXTRA_SYMTAB_INFO (symtab);
2318 struct partial_symtab *
2319 allocate_psymtab (char *filename, struct objfile *objfile)
2321 struct partial_symtab *psymtab;
2323 if (objfile->free_psymtabs)
2325 psymtab = objfile->free_psymtabs;
2326 objfile->free_psymtabs = psymtab->next;
2329 psymtab = (struct partial_symtab *)
2330 obstack_alloc (&objfile->objfile_obstack,
2331 sizeof (struct partial_symtab));
2333 memset (psymtab, 0, sizeof (struct partial_symtab));
2334 psymtab->filename = obsavestring (filename, strlen (filename),
2335 &objfile->objfile_obstack);
2336 psymtab->symtab = NULL;
2338 /* Prepend it to the psymtab list for the objfile it belongs to.
2339 Psymtabs are searched in most recent inserted -> least recent
2342 psymtab->objfile = objfile;
2343 psymtab->next = objfile->psymtabs;
2344 objfile->psymtabs = psymtab;
2347 struct partial_symtab **prev_pst;
2348 psymtab->objfile = objfile;
2349 psymtab->next = NULL;
2350 prev_pst = &(objfile->psymtabs);
2351 while ((*prev_pst) != NULL)
2352 prev_pst = &((*prev_pst)->next);
2353 (*prev_pst) = psymtab;
2361 discard_psymtab (struct partial_symtab *pst)
2363 struct partial_symtab **prev_pst;
2366 Empty psymtabs happen as a result of header files which don't
2367 have any symbols in them. There can be a lot of them. But this
2368 check is wrong, in that a psymtab with N_SLINE entries but
2369 nothing else is not empty, but we don't realize that. Fixing
2370 that without slowing things down might be tricky. */
2372 /* First, snip it out of the psymtab chain */
2374 prev_pst = &(pst->objfile->psymtabs);
2375 while ((*prev_pst) != pst)
2376 prev_pst = &((*prev_pst)->next);
2377 (*prev_pst) = pst->next;
2379 /* Next, put it on a free list for recycling */
2381 pst->next = pst->objfile->free_psymtabs;
2382 pst->objfile->free_psymtabs = pst;
2386 /* Reset all data structures in gdb which may contain references to symbol
2390 clear_symtab_users (void)
2392 /* Someday, we should do better than this, by only blowing away
2393 the things that really need to be blown. */
2394 clear_value_history ();
2396 clear_internalvars ();
2397 breakpoint_re_set ();
2398 set_default_breakpoint (0, 0, 0, 0);
2399 clear_current_source_symtab_and_line ();
2400 clear_pc_function_cache ();
2401 if (target_new_objfile_hook)
2402 target_new_objfile_hook (NULL);
2406 clear_symtab_users_cleanup (void *ignore)
2408 clear_symtab_users ();
2411 /* clear_symtab_users_once:
2413 This function is run after symbol reading, or from a cleanup.
2414 If an old symbol table was obsoleted, the old symbol table
2415 has been blown away, but the other GDB data structures that may
2416 reference it have not yet been cleared or re-directed. (The old
2417 symtab was zapped, and the cleanup queued, in free_named_symtab()
2420 This function can be queued N times as a cleanup, or called
2421 directly; it will do all the work the first time, and then will be a
2422 no-op until the next time it is queued. This works by bumping a
2423 counter at queueing time. Much later when the cleanup is run, or at
2424 the end of symbol processing (in case the cleanup is discarded), if
2425 the queued count is greater than the "done-count", we do the work
2426 and set the done-count to the queued count. If the queued count is
2427 less than or equal to the done-count, we just ignore the call. This
2428 is needed because reading a single .o file will often replace many
2429 symtabs (one per .h file, for example), and we don't want to reset
2430 the breakpoints N times in the user's face.
2432 The reason we both queue a cleanup, and call it directly after symbol
2433 reading, is because the cleanup protects us in case of errors, but is
2434 discarded if symbol reading is successful. */
2437 /* FIXME: As free_named_symtabs is currently a big noop this function
2438 is no longer needed. */
2439 static void clear_symtab_users_once (void);
2441 static int clear_symtab_users_queued;
2442 static int clear_symtab_users_done;
2445 clear_symtab_users_once (void)
2447 /* Enforce once-per-`do_cleanups'-semantics */
2448 if (clear_symtab_users_queued <= clear_symtab_users_done)
2450 clear_symtab_users_done = clear_symtab_users_queued;
2452 clear_symtab_users ();
2456 /* Delete the specified psymtab, and any others that reference it. */
2459 cashier_psymtab (struct partial_symtab *pst)
2461 struct partial_symtab *ps, *pprev = NULL;
2464 /* Find its previous psymtab in the chain */
2465 for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
2474 /* Unhook it from the chain. */
2475 if (ps == pst->objfile->psymtabs)
2476 pst->objfile->psymtabs = ps->next;
2478 pprev->next = ps->next;
2480 /* FIXME, we can't conveniently deallocate the entries in the
2481 partial_symbol lists (global_psymbols/static_psymbols) that
2482 this psymtab points to. These just take up space until all
2483 the psymtabs are reclaimed. Ditto the dependencies list and
2484 filename, which are all in the objfile_obstack. */
2486 /* We need to cashier any psymtab that has this one as a dependency... */
2488 for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
2490 for (i = 0; i < ps->number_of_dependencies; i++)
2492 if (ps->dependencies[i] == pst)
2494 cashier_psymtab (ps);
2495 goto again; /* Must restart, chain has been munged. */
2502 /* If a symtab or psymtab for filename NAME is found, free it along
2503 with any dependent breakpoints, displays, etc.
2504 Used when loading new versions of object modules with the "add-file"
2505 command. This is only called on the top-level symtab or psymtab's name;
2506 it is not called for subsidiary files such as .h files.
2508 Return value is 1 if we blew away the environment, 0 if not.
2509 FIXME. The return value appears to never be used.
2511 FIXME. I think this is not the best way to do this. We should
2512 work on being gentler to the environment while still cleaning up
2513 all stray pointers into the freed symtab. */
2516 free_named_symtabs (char *name)
2519 /* FIXME: With the new method of each objfile having it's own
2520 psymtab list, this function needs serious rethinking. In particular,
2521 why was it ever necessary to toss psymtabs with specific compilation
2522 unit filenames, as opposed to all psymtabs from a particular symbol
2524 Well, the answer is that some systems permit reloading of particular
2525 compilation units. We want to blow away any old info about these
2526 compilation units, regardless of which objfiles they arrived in. --gnu. */
2529 struct symtab *prev;
2530 struct partial_symtab *ps;
2531 struct blockvector *bv;
2534 /* We only wack things if the symbol-reload switch is set. */
2535 if (!symbol_reloading)
2538 /* Some symbol formats have trouble providing file names... */
2539 if (name == 0 || *name == '\0')
2542 /* Look for a psymtab with the specified name. */
2545 for (ps = partial_symtab_list; ps; ps = ps->next)
2547 if (strcmp (name, ps->filename) == 0)
2549 cashier_psymtab (ps); /* Blow it away...and its little dog, too. */
2550 goto again2; /* Must restart, chain has been munged */
2554 /* Look for a symtab with the specified name. */
2556 for (s = symtab_list; s; s = s->next)
2558 if (strcmp (name, s->filename) == 0)
2565 if (s == symtab_list)
2566 symtab_list = s->next;
2568 prev->next = s->next;
2570 /* For now, queue a delete for all breakpoints, displays, etc., whether
2571 or not they depend on the symtab being freed. This should be
2572 changed so that only those data structures affected are deleted. */
2574 /* But don't delete anything if the symtab is empty.
2575 This test is necessary due to a bug in "dbxread.c" that
2576 causes empty symtabs to be created for N_SO symbols that
2577 contain the pathname of the object file. (This problem
2578 has been fixed in GDB 3.9x). */
2580 bv = BLOCKVECTOR (s);
2581 if (BLOCKVECTOR_NBLOCKS (bv) > 2
2582 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK))
2583 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)))
2585 complaint (&symfile_complaints, "Replacing old symbols for `%s'",
2587 clear_symtab_users_queued++;
2588 make_cleanup (clear_symtab_users_once, 0);
2593 complaint (&symfile_complaints, "Empty symbol table found for `%s'",
2601 /* It is still possible that some breakpoints will be affected
2602 even though no symtab was found, since the file might have
2603 been compiled without debugging, and hence not be associated
2604 with a symtab. In order to handle this correctly, we would need
2605 to keep a list of text address ranges for undebuggable files.
2606 For now, we do nothing, since this is a fairly obscure case. */
2610 /* FIXME, what about the minimal symbol table? */
2617 /* Allocate and partially fill a partial symtab. It will be
2618 completely filled at the end of the symbol list.
2620 FILENAME is the name of the symbol-file we are reading from. */
2622 struct partial_symtab *
2623 start_psymtab_common (struct objfile *objfile,
2624 struct section_offsets *section_offsets, char *filename,
2625 CORE_ADDR textlow, struct partial_symbol **global_syms,
2626 struct partial_symbol **static_syms)
2628 struct partial_symtab *psymtab;
2630 psymtab = allocate_psymtab (filename, objfile);
2631 psymtab->section_offsets = section_offsets;
2632 psymtab->textlow = textlow;
2633 psymtab->texthigh = psymtab->textlow; /* default */
2634 psymtab->globals_offset = global_syms - objfile->global_psymbols.list;
2635 psymtab->statics_offset = static_syms - objfile->static_psymbols.list;
2639 /* Add a symbol with a long value to a psymtab.
2640 Since one arg is a struct, we pass in a ptr and deref it (sigh).
2641 Return the partial symbol that has been added. */
2643 /* NOTE: carlton/2003-09-11: The reason why we return the partial
2644 symbol is so that callers can get access to the symbol's demangled
2645 name, which they don't have any cheap way to determine otherwise.
2646 (Currenly, dwarf2read.c is the only file who uses that information,
2647 though it's possible that other readers might in the future.)
2648 Elena wasn't thrilled about that, and I don't blame her, but we
2649 couldn't come up with a better way to get that information. If
2650 it's needed in other situations, we could consider breaking up
2651 SYMBOL_SET_NAMES to provide access to the demangled name lookup
2654 const struct partial_symbol *
2655 add_psymbol_to_list (char *name, int namelength, domain_enum domain,
2656 enum address_class class,
2657 struct psymbol_allocation_list *list, long val, /* Value as a long */
2658 CORE_ADDR coreaddr, /* Value as a CORE_ADDR */
2659 enum language language, struct objfile *objfile)
2661 struct partial_symbol *psym;
2662 char *buf = alloca (namelength + 1);
2663 /* psymbol is static so that there will be no uninitialized gaps in the
2664 structure which might contain random data, causing cache misses in
2666 static struct partial_symbol psymbol;
2668 /* Create local copy of the partial symbol */
2669 memcpy (buf, name, namelength);
2670 buf[namelength] = '\0';
2671 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2674 SYMBOL_VALUE (&psymbol) = val;
2678 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
2680 SYMBOL_SECTION (&psymbol) = 0;
2681 SYMBOL_LANGUAGE (&psymbol) = language;
2682 PSYMBOL_DOMAIN (&psymbol) = domain;
2683 PSYMBOL_CLASS (&psymbol) = class;
2685 SYMBOL_SET_NAMES (&psymbol, buf, namelength, objfile);
2687 /* Stash the partial symbol away in the cache */
2688 psym = deprecated_bcache (&psymbol, sizeof (struct partial_symbol),
2689 objfile->psymbol_cache);
2691 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2692 if (list->next >= list->list + list->size)
2694 extend_psymbol_list (list, objfile);
2696 *list->next++ = psym;
2697 OBJSTAT (objfile, n_psyms++);
2702 /* Add a symbol with a long value to a psymtab. This differs from
2703 * add_psymbol_to_list above in taking both a mangled and a demangled
2707 add_psymbol_with_dem_name_to_list (char *name, int namelength, char *dem_name,
2708 int dem_namelength, domain_enum domain,
2709 enum address_class class,
2710 struct psymbol_allocation_list *list, long val, /* Value as a long */
2711 CORE_ADDR coreaddr, /* Value as a CORE_ADDR */
2712 enum language language,
2713 struct objfile *objfile)
2715 struct partial_symbol *psym;
2716 char *buf = alloca (namelength + 1);
2717 /* psymbol is static so that there will be no uninitialized gaps in the
2718 structure which might contain random data, causing cache misses in
2720 static struct partial_symbol psymbol;
2722 /* Create local copy of the partial symbol */
2724 memcpy (buf, name, namelength);
2725 buf[namelength] = '\0';
2726 DEPRECATED_SYMBOL_NAME (&psymbol) = deprecated_bcache (buf, namelength + 1,
2727 objfile->psymbol_cache);
2729 buf = alloca (dem_namelength + 1);
2730 memcpy (buf, dem_name, dem_namelength);
2731 buf[dem_namelength] = '\0';
2736 case language_cplus:
2737 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol) =
2738 deprecated_bcache (buf, dem_namelength + 1, objfile->psymbol_cache);
2740 /* FIXME What should be done for the default case? Ignoring for now. */
2743 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2746 SYMBOL_VALUE (&psymbol) = val;
2750 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
2752 SYMBOL_SECTION (&psymbol) = 0;
2753 SYMBOL_LANGUAGE (&psymbol) = language;
2754 PSYMBOL_DOMAIN (&psymbol) = domain;
2755 PSYMBOL_CLASS (&psymbol) = class;
2756 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language);
2758 /* Stash the partial symbol away in the cache */
2759 psym = deprecated_bcache (&psymbol, sizeof (struct partial_symbol),
2760 objfile->psymbol_cache);
2762 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2763 if (list->next >= list->list + list->size)
2765 extend_psymbol_list (list, objfile);
2767 *list->next++ = psym;
2768 OBJSTAT (objfile, n_psyms++);
2771 /* Initialize storage for partial symbols. */
2774 init_psymbol_list (struct objfile *objfile, int total_symbols)
2776 /* Free any previously allocated psymbol lists. */
2778 if (objfile->global_psymbols.list)
2780 xmfree (objfile->md, objfile->global_psymbols.list);
2782 if (objfile->static_psymbols.list)
2784 xmfree (objfile->md, objfile->static_psymbols.list);
2787 /* Current best guess is that approximately a twentieth
2788 of the total symbols (in a debugging file) are global or static
2791 objfile->global_psymbols.size = total_symbols / 10;
2792 objfile->static_psymbols.size = total_symbols / 10;
2794 if (objfile->global_psymbols.size > 0)
2796 objfile->global_psymbols.next =
2797 objfile->global_psymbols.list = (struct partial_symbol **)
2798 xmmalloc (objfile->md, (objfile->global_psymbols.size
2799 * sizeof (struct partial_symbol *)));
2801 if (objfile->static_psymbols.size > 0)
2803 objfile->static_psymbols.next =
2804 objfile->static_psymbols.list = (struct partial_symbol **)
2805 xmmalloc (objfile->md, (objfile->static_psymbols.size
2806 * sizeof (struct partial_symbol *)));
2811 The following code implements an abstraction for debugging overlay sections.
2813 The target model is as follows:
2814 1) The gnu linker will permit multiple sections to be mapped into the
2815 same VMA, each with its own unique LMA (or load address).
2816 2) It is assumed that some runtime mechanism exists for mapping the
2817 sections, one by one, from the load address into the VMA address.
2818 3) This code provides a mechanism for gdb to keep track of which
2819 sections should be considered to be mapped from the VMA to the LMA.
2820 This information is used for symbol lookup, and memory read/write.
2821 For instance, if a section has been mapped then its contents
2822 should be read from the VMA, otherwise from the LMA.
2824 Two levels of debugger support for overlays are available. One is
2825 "manual", in which the debugger relies on the user to tell it which
2826 overlays are currently mapped. This level of support is
2827 implemented entirely in the core debugger, and the information about
2828 whether a section is mapped is kept in the objfile->obj_section table.
2830 The second level of support is "automatic", and is only available if
2831 the target-specific code provides functionality to read the target's
2832 overlay mapping table, and translate its contents for the debugger
2833 (by updating the mapped state information in the obj_section tables).
2835 The interface is as follows:
2837 overlay map <name> -- tell gdb to consider this section mapped
2838 overlay unmap <name> -- tell gdb to consider this section unmapped
2839 overlay list -- list the sections that GDB thinks are mapped
2840 overlay read-target -- get the target's state of what's mapped
2841 overlay off/manual/auto -- set overlay debugging state
2842 Functional interface:
2843 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2844 section, return that section.
2845 find_pc_overlay(pc): find any overlay section that contains
2846 the pc, either in its VMA or its LMA
2847 overlay_is_mapped(sect): true if overlay is marked as mapped
2848 section_is_overlay(sect): true if section's VMA != LMA
2849 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2850 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2851 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2852 overlay_mapped_address(...): map an address from section's LMA to VMA
2853 overlay_unmapped_address(...): map an address from section's VMA to LMA
2854 symbol_overlayed_address(...): Return a "current" address for symbol:
2855 either in VMA or LMA depending on whether
2856 the symbol's section is currently mapped
2859 /* Overlay debugging state: */
2861 enum overlay_debugging_state overlay_debugging = ovly_off;
2862 int overlay_cache_invalid = 0; /* True if need to refresh mapped state */
2864 /* Target vector for refreshing overlay mapped state */
2865 static void simple_overlay_update (struct obj_section *);
2866 void (*target_overlay_update) (struct obj_section *) = simple_overlay_update;
2868 /* Function: section_is_overlay (SECTION)
2869 Returns true if SECTION has VMA not equal to LMA, ie.
2870 SECTION is loaded at an address different from where it will "run". */
2873 section_is_overlay (asection *section)
2875 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2877 if (overlay_debugging)
2878 if (section && section->lma != 0 &&
2879 section->vma != section->lma)
2885 /* Function: overlay_invalidate_all (void)
2886 Invalidate the mapped state of all overlay sections (mark it as stale). */
2889 overlay_invalidate_all (void)
2891 struct objfile *objfile;
2892 struct obj_section *sect;
2894 ALL_OBJSECTIONS (objfile, sect)
2895 if (section_is_overlay (sect->the_bfd_section))
2896 sect->ovly_mapped = -1;
2899 /* Function: overlay_is_mapped (SECTION)
2900 Returns true if section is an overlay, and is currently mapped.
2901 Private: public access is thru function section_is_mapped.
2903 Access to the ovly_mapped flag is restricted to this function, so
2904 that we can do automatic update. If the global flag
2905 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2906 overlay_invalidate_all. If the mapped state of the particular
2907 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2910 overlay_is_mapped (struct obj_section *osect)
2912 if (osect == 0 || !section_is_overlay (osect->the_bfd_section))
2915 switch (overlay_debugging)
2919 return 0; /* overlay debugging off */
2920 case ovly_auto: /* overlay debugging automatic */
2921 /* Unles there is a target_overlay_update function,
2922 there's really nothing useful to do here (can't really go auto) */
2923 if (target_overlay_update)
2925 if (overlay_cache_invalid)
2927 overlay_invalidate_all ();
2928 overlay_cache_invalid = 0;
2930 if (osect->ovly_mapped == -1)
2931 (*target_overlay_update) (osect);
2933 /* fall thru to manual case */
2934 case ovly_on: /* overlay debugging manual */
2935 return osect->ovly_mapped == 1;
2939 /* Function: section_is_mapped
2940 Returns true if section is an overlay, and is currently mapped. */
2943 section_is_mapped (asection *section)
2945 struct objfile *objfile;
2946 struct obj_section *osect;
2948 if (overlay_debugging)
2949 if (section && section_is_overlay (section))
2950 ALL_OBJSECTIONS (objfile, osect)
2951 if (osect->the_bfd_section == section)
2952 return overlay_is_mapped (osect);
2957 /* Function: pc_in_unmapped_range
2958 If PC falls into the lma range of SECTION, return true, else false. */
2961 pc_in_unmapped_range (CORE_ADDR pc, asection *section)
2963 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2967 if (overlay_debugging)
2968 if (section && section_is_overlay (section))
2970 size = bfd_get_section_size_before_reloc (section);
2971 if (section->lma <= pc && pc < section->lma + size)
2977 /* Function: pc_in_mapped_range
2978 If PC falls into the vma range of SECTION, return true, else false. */
2981 pc_in_mapped_range (CORE_ADDR pc, asection *section)
2983 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2987 if (overlay_debugging)
2988 if (section && section_is_overlay (section))
2990 size = bfd_get_section_size_before_reloc (section);
2991 if (section->vma <= pc && pc < section->vma + size)
2998 /* Return true if the mapped ranges of sections A and B overlap, false
3001 sections_overlap (asection *a, asection *b)
3003 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3005 CORE_ADDR a_start = a->vma;
3006 CORE_ADDR a_end = a->vma + bfd_get_section_size_before_reloc (a);
3007 CORE_ADDR b_start = b->vma;
3008 CORE_ADDR b_end = b->vma + bfd_get_section_size_before_reloc (b);
3010 return (a_start < b_end && b_start < a_end);
3013 /* Function: overlay_unmapped_address (PC, SECTION)
3014 Returns the address corresponding to PC in the unmapped (load) range.
3015 May be the same as PC. */
3018 overlay_unmapped_address (CORE_ADDR pc, asection *section)
3020 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
3022 if (overlay_debugging)
3023 if (section && section_is_overlay (section) &&
3024 pc_in_mapped_range (pc, section))
3025 return pc + section->lma - section->vma;
3030 /* Function: overlay_mapped_address (PC, SECTION)
3031 Returns the address corresponding to PC in the mapped (runtime) range.
3032 May be the same as PC. */
3035 overlay_mapped_address (CORE_ADDR pc, asection *section)
3037 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3039 if (overlay_debugging)
3040 if (section && section_is_overlay (section) &&
3041 pc_in_unmapped_range (pc, section))
3042 return pc + section->vma - section->lma;
3048 /* Function: symbol_overlayed_address
3049 Return one of two addresses (relative to the VMA or to the LMA),
3050 depending on whether the section is mapped or not. */
3053 symbol_overlayed_address (CORE_ADDR address, asection *section)
3055 if (overlay_debugging)
3057 /* If the symbol has no section, just return its regular address. */
3060 /* If the symbol's section is not an overlay, just return its address */
3061 if (!section_is_overlay (section))
3063 /* If the symbol's section is mapped, just return its address */
3064 if (section_is_mapped (section))
3067 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3068 * then return its LOADED address rather than its vma address!!
3070 return overlay_unmapped_address (address, section);
3075 /* Function: find_pc_overlay (PC)
3076 Return the best-match overlay section for PC:
3077 If PC matches a mapped overlay section's VMA, return that section.
3078 Else if PC matches an unmapped section's VMA, return that section.
3079 Else if PC matches an unmapped section's LMA, return that section. */
3082 find_pc_overlay (CORE_ADDR pc)
3084 struct objfile *objfile;
3085 struct obj_section *osect, *best_match = NULL;
3087 if (overlay_debugging)
3088 ALL_OBJSECTIONS (objfile, osect)
3089 if (section_is_overlay (osect->the_bfd_section))
3091 if (pc_in_mapped_range (pc, osect->the_bfd_section))
3093 if (overlay_is_mapped (osect))
3094 return osect->the_bfd_section;
3098 else if (pc_in_unmapped_range (pc, osect->the_bfd_section))
3101 return best_match ? best_match->the_bfd_section : NULL;
3104 /* Function: find_pc_mapped_section (PC)
3105 If PC falls into the VMA address range of an overlay section that is
3106 currently marked as MAPPED, return that section. Else return NULL. */
3109 find_pc_mapped_section (CORE_ADDR pc)
3111 struct objfile *objfile;
3112 struct obj_section *osect;
3114 if (overlay_debugging)
3115 ALL_OBJSECTIONS (objfile, osect)
3116 if (pc_in_mapped_range (pc, osect->the_bfd_section) &&
3117 overlay_is_mapped (osect))
3118 return osect->the_bfd_section;
3123 /* Function: list_overlays_command
3124 Print a list of mapped sections and their PC ranges */
3127 list_overlays_command (char *args, int from_tty)
3130 struct objfile *objfile;
3131 struct obj_section *osect;
3133 if (overlay_debugging)
3134 ALL_OBJSECTIONS (objfile, osect)
3135 if (overlay_is_mapped (osect))
3141 vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section);
3142 lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section);
3143 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
3144 name = bfd_section_name (objfile->obfd, osect->the_bfd_section);
3146 printf_filtered ("Section %s, loaded at ", name);
3147 print_address_numeric (lma, 1, gdb_stdout);
3148 puts_filtered (" - ");
3149 print_address_numeric (lma + size, 1, gdb_stdout);
3150 printf_filtered (", mapped at ");
3151 print_address_numeric (vma, 1, gdb_stdout);
3152 puts_filtered (" - ");
3153 print_address_numeric (vma + size, 1, gdb_stdout);
3154 puts_filtered ("\n");
3159 printf_filtered ("No sections are mapped.\n");
3162 /* Function: map_overlay_command
3163 Mark the named section as mapped (ie. residing at its VMA address). */
3166 map_overlay_command (char *args, int from_tty)
3168 struct objfile *objfile, *objfile2;
3169 struct obj_section *sec, *sec2;
3172 if (!overlay_debugging)
3174 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3175 the 'overlay manual' command.");
3177 if (args == 0 || *args == 0)
3178 error ("Argument required: name of an overlay section");
3180 /* First, find a section matching the user supplied argument */
3181 ALL_OBJSECTIONS (objfile, sec)
3182 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
3184 /* Now, check to see if the section is an overlay. */
3185 bfdsec = sec->the_bfd_section;
3186 if (!section_is_overlay (bfdsec))
3187 continue; /* not an overlay section */
3189 /* Mark the overlay as "mapped" */
3190 sec->ovly_mapped = 1;
3192 /* Next, make a pass and unmap any sections that are
3193 overlapped by this new section: */
3194 ALL_OBJSECTIONS (objfile2, sec2)
3195 if (sec2->ovly_mapped
3197 && sec->the_bfd_section != sec2->the_bfd_section
3198 && sections_overlap (sec->the_bfd_section,
3199 sec2->the_bfd_section))
3202 printf_unfiltered ("Note: section %s unmapped by overlap\n",
3203 bfd_section_name (objfile->obfd,
3204 sec2->the_bfd_section));
3205 sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2 */
3209 error ("No overlay section called %s", args);
3212 /* Function: unmap_overlay_command
3213 Mark the overlay section as unmapped
3214 (ie. resident in its LMA address range, rather than the VMA range). */
3217 unmap_overlay_command (char *args, int from_tty)
3219 struct objfile *objfile;
3220 struct obj_section *sec;
3222 if (!overlay_debugging)
3224 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3225 the 'overlay manual' command.");
3227 if (args == 0 || *args == 0)
3228 error ("Argument required: name of an overlay section");
3230 /* First, find a section matching the user supplied argument */
3231 ALL_OBJSECTIONS (objfile, sec)
3232 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
3234 if (!sec->ovly_mapped)
3235 error ("Section %s is not mapped", args);
3236 sec->ovly_mapped = 0;
3239 error ("No overlay section called %s", args);
3242 /* Function: overlay_auto_command
3243 A utility command to turn on overlay debugging.
3244 Possibly this should be done via a set/show command. */
3247 overlay_auto_command (char *args, int from_tty)
3249 overlay_debugging = ovly_auto;
3250 enable_overlay_breakpoints ();
3252 printf_unfiltered ("Automatic overlay debugging enabled.");
3255 /* Function: overlay_manual_command
3256 A utility command to turn on overlay debugging.
3257 Possibly this should be done via a set/show command. */
3260 overlay_manual_command (char *args, int from_tty)
3262 overlay_debugging = ovly_on;
3263 disable_overlay_breakpoints ();
3265 printf_unfiltered ("Overlay debugging enabled.");
3268 /* Function: overlay_off_command
3269 A utility command to turn on overlay debugging.
3270 Possibly this should be done via a set/show command. */
3273 overlay_off_command (char *args, int from_tty)
3275 overlay_debugging = ovly_off;
3276 disable_overlay_breakpoints ();
3278 printf_unfiltered ("Overlay debugging disabled.");
3282 overlay_load_command (char *args, int from_tty)
3284 if (target_overlay_update)
3285 (*target_overlay_update) (NULL);
3287 error ("This target does not know how to read its overlay state.");
3290 /* Function: overlay_command
3291 A place-holder for a mis-typed command */
3293 /* Command list chain containing all defined "overlay" subcommands. */
3294 struct cmd_list_element *overlaylist;
3297 overlay_command (char *args, int from_tty)
3300 ("\"overlay\" must be followed by the name of an overlay command.\n");
3301 help_list (overlaylist, "overlay ", -1, gdb_stdout);
3305 /* Target Overlays for the "Simplest" overlay manager:
3307 This is GDB's default target overlay layer. It works with the
3308 minimal overlay manager supplied as an example by Cygnus. The
3309 entry point is via a function pointer "target_overlay_update",
3310 so targets that use a different runtime overlay manager can
3311 substitute their own overlay_update function and take over the
3314 The overlay_update function pokes around in the target's data structures
3315 to see what overlays are mapped, and updates GDB's overlay mapping with
3318 In this simple implementation, the target data structures are as follows:
3319 unsigned _novlys; /# number of overlay sections #/
3320 unsigned _ovly_table[_novlys][4] = {
3321 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3322 {..., ..., ..., ...},
3324 unsigned _novly_regions; /# number of overlay regions #/
3325 unsigned _ovly_region_table[_novly_regions][3] = {
3326 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3329 These functions will attempt to update GDB's mappedness state in the
3330 symbol section table, based on the target's mappedness state.
3332 To do this, we keep a cached copy of the target's _ovly_table, and
3333 attempt to detect when the cached copy is invalidated. The main
3334 entry point is "simple_overlay_update(SECT), which looks up SECT in
3335 the cached table and re-reads only the entry for that section from
3336 the target (whenever possible).
3339 /* Cached, dynamically allocated copies of the target data structures: */
3340 static unsigned (*cache_ovly_table)[4] = 0;
3342 static unsigned (*cache_ovly_region_table)[3] = 0;
3344 static unsigned cache_novlys = 0;
3346 static unsigned cache_novly_regions = 0;
3348 static CORE_ADDR cache_ovly_table_base = 0;
3350 static CORE_ADDR cache_ovly_region_table_base = 0;
3354 VMA, SIZE, LMA, MAPPED
3356 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
3358 /* Throw away the cached copy of _ovly_table */
3360 simple_free_overlay_table (void)
3362 if (cache_ovly_table)
3363 xfree (cache_ovly_table);
3365 cache_ovly_table = NULL;
3366 cache_ovly_table_base = 0;
3370 /* Throw away the cached copy of _ovly_region_table */
3372 simple_free_overlay_region_table (void)
3374 if (cache_ovly_region_table)
3375 xfree (cache_ovly_region_table);
3376 cache_novly_regions = 0;
3377 cache_ovly_region_table = NULL;
3378 cache_ovly_region_table_base = 0;
3382 /* Read an array of ints from the target into a local buffer.
3383 Convert to host order. int LEN is number of ints */
3385 read_target_long_array (CORE_ADDR memaddr, unsigned int *myaddr, int len)
3387 /* FIXME (alloca): Not safe if array is very large. */
3388 char *buf = alloca (len * TARGET_LONG_BYTES);
3391 read_memory (memaddr, buf, len * TARGET_LONG_BYTES);
3392 for (i = 0; i < len; i++)
3393 myaddr[i] = extract_unsigned_integer (TARGET_LONG_BYTES * i + buf,
3397 /* Find and grab a copy of the target _ovly_table
3398 (and _novlys, which is needed for the table's size) */
3400 simple_read_overlay_table (void)
3402 struct minimal_symbol *novlys_msym, *ovly_table_msym;
3404 simple_free_overlay_table ();
3405 novlys_msym = lookup_minimal_symbol ("_novlys", NULL, NULL);
3408 error ("Error reading inferior's overlay table: "
3409 "couldn't find `_novlys' variable\n"
3410 "in inferior. Use `overlay manual' mode.");
3414 ovly_table_msym = lookup_minimal_symbol ("_ovly_table", NULL, NULL);
3415 if (! ovly_table_msym)
3417 error ("Error reading inferior's overlay table: couldn't find "
3418 "`_ovly_table' array\n"
3419 "in inferior. Use `overlay manual' mode.");
3423 cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym), 4);
3425 = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table));
3426 cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (ovly_table_msym);
3427 read_target_long_array (cache_ovly_table_base,
3428 (int *) cache_ovly_table,
3431 return 1; /* SUCCESS */
3435 /* Find and grab a copy of the target _ovly_region_table
3436 (and _novly_regions, which is needed for the table's size) */
3438 simple_read_overlay_region_table (void)
3440 struct minimal_symbol *msym;
3442 simple_free_overlay_region_table ();
3443 msym = lookup_minimal_symbol ("_novly_regions", NULL, NULL);
3445 cache_novly_regions = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4);
3447 return 0; /* failure */
3448 cache_ovly_region_table = (void *) xmalloc (cache_novly_regions * 12);
3449 if (cache_ovly_region_table != NULL)
3451 msym = lookup_minimal_symbol ("_ovly_region_table", NULL, NULL);
3454 cache_ovly_region_table_base = SYMBOL_VALUE_ADDRESS (msym);
3455 read_target_long_array (cache_ovly_region_table_base,
3456 (int *) cache_ovly_region_table,
3457 cache_novly_regions * 3);
3460 return 0; /* failure */
3463 return 0; /* failure */
3464 return 1; /* SUCCESS */
3468 /* Function: simple_overlay_update_1
3469 A helper function for simple_overlay_update. Assuming a cached copy
3470 of _ovly_table exists, look through it to find an entry whose vma,
3471 lma and size match those of OSECT. Re-read the entry and make sure
3472 it still matches OSECT (else the table may no longer be valid).
3473 Set OSECT's mapped state to match the entry. Return: 1 for
3474 success, 0 for failure. */
3477 simple_overlay_update_1 (struct obj_section *osect)
3480 bfd *obfd = osect->objfile->obfd;
3481 asection *bsect = osect->the_bfd_section;
3483 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
3484 for (i = 0; i < cache_novlys; i++)
3485 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3486 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3487 /* && cache_ovly_table[i][SIZE] == size */ )
3489 read_target_long_array (cache_ovly_table_base + i * TARGET_LONG_BYTES,
3490 (int *) cache_ovly_table[i], 4);
3491 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3492 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3493 /* && cache_ovly_table[i][SIZE] == size */ )
3495 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3498 else /* Warning! Warning! Target's ovly table has changed! */
3504 /* Function: simple_overlay_update
3505 If OSECT is NULL, then update all sections' mapped state
3506 (after re-reading the entire target _ovly_table).
3507 If OSECT is non-NULL, then try to find a matching entry in the
3508 cached ovly_table and update only OSECT's mapped state.
3509 If a cached entry can't be found or the cache isn't valid, then
3510 re-read the entire cache, and go ahead and update all sections. */
3513 simple_overlay_update (struct obj_section *osect)
3515 struct objfile *objfile;
3517 /* Were we given an osect to look up? NULL means do all of them. */
3519 /* Have we got a cached copy of the target's overlay table? */
3520 if (cache_ovly_table != NULL)
3521 /* Does its cached location match what's currently in the symtab? */
3522 if (cache_ovly_table_base ==
3523 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL, NULL)))
3524 /* Then go ahead and try to look up this single section in the cache */
3525 if (simple_overlay_update_1 (osect))
3526 /* Found it! We're done. */
3529 /* Cached table no good: need to read the entire table anew.
3530 Or else we want all the sections, in which case it's actually
3531 more efficient to read the whole table in one block anyway. */
3533 if (! simple_read_overlay_table ())
3536 /* Now may as well update all sections, even if only one was requested. */
3537 ALL_OBJSECTIONS (objfile, osect)
3538 if (section_is_overlay (osect->the_bfd_section))
3541 bfd *obfd = osect->objfile->obfd;
3542 asection *bsect = osect->the_bfd_section;
3544 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
3545 for (i = 0; i < cache_novlys; i++)
3546 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3547 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3548 /* && cache_ovly_table[i][SIZE] == size */ )
3549 { /* obj_section matches i'th entry in ovly_table */
3550 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3551 break; /* finished with inner for loop: break out */
3556 /* Set the output sections and output offsets for section SECTP in
3557 ABFD. The relocation code in BFD will read these offsets, so we
3558 need to be sure they're initialized. We map each section to itself,
3559 with no offset; this means that SECTP->vma will be honored. */
3562 symfile_dummy_outputs (bfd *abfd, asection *sectp, void *dummy)
3564 sectp->output_section = sectp;
3565 sectp->output_offset = 0;
3568 /* Relocate the contents of a debug section SECTP in ABFD. The
3569 contents are stored in BUF if it is non-NULL, or returned in a
3570 malloc'd buffer otherwise.
3572 For some platforms and debug info formats, shared libraries contain
3573 relocations against the debug sections (particularly for DWARF-2;
3574 one affected platform is PowerPC GNU/Linux, although it depends on
3575 the version of the linker in use). Also, ELF object files naturally
3576 have unresolved relocations for their debug sections. We need to apply
3577 the relocations in order to get the locations of symbols correct. */
3580 symfile_relocate_debug_section (bfd *abfd, asection *sectp, bfd_byte *buf)
3582 /* We're only interested in debugging sections with relocation
3584 if ((sectp->flags & SEC_RELOC) == 0)
3586 if ((sectp->flags & SEC_DEBUGGING) == 0)
3589 /* We will handle section offsets properly elsewhere, so relocate as if
3590 all sections begin at 0. */
3591 bfd_map_over_sections (abfd, symfile_dummy_outputs, NULL);
3593 return bfd_simple_get_relocated_section_contents (abfd, sectp, buf, NULL);
3597 _initialize_symfile (void)
3599 struct cmd_list_element *c;
3601 c = add_cmd ("symbol-file", class_files, symbol_file_command,
3602 "Load symbol table from executable file FILE.\n\
3603 The `file' command can also load symbol tables, as well as setting the file\n\
3604 to execute.", &cmdlist);
3605 set_cmd_completer (c, filename_completer);
3607 c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command,
3608 "Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3609 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3610 ADDR is the starting address of the file's text.\n\
3611 The optional arguments are section-name section-address pairs and\n\
3612 should be specified if the data and bss segments are not contiguous\n\
3613 with the text. SECT is a section name to be loaded at SECT_ADDR.",
3615 set_cmd_completer (c, filename_completer);
3617 c = add_cmd ("add-symbol-file-from-memory", class_files,
3618 add_symbol_file_from_memory_command,
3620 Load the symbols out of memory from a dynamically loaded object file.\n\
3621 Give an expression for the address of the file's shared object file header.",
3624 c = add_cmd ("add-shared-symbol-files", class_files,
3625 add_shared_symbol_files_command,
3626 "Load the symbols from shared objects in the dynamic linker's link map.",
3628 c = add_alias_cmd ("assf", "add-shared-symbol-files", class_files, 1,
3631 c = add_cmd ("load", class_files, load_command,
3632 "Dynamically load FILE into the running program, and record its symbols\n\
3633 for access from GDB.", &cmdlist);
3634 set_cmd_completer (c, filename_completer);
3637 (add_set_cmd ("symbol-reloading", class_support, var_boolean,
3638 (char *) &symbol_reloading,
3639 "Set dynamic symbol table reloading multiple times in one run.",
3643 add_prefix_cmd ("overlay", class_support, overlay_command,
3644 "Commands for debugging overlays.", &overlaylist,
3645 "overlay ", 0, &cmdlist);
3647 add_com_alias ("ovly", "overlay", class_alias, 1);
3648 add_com_alias ("ov", "overlay", class_alias, 1);
3650 add_cmd ("map-overlay", class_support, map_overlay_command,
3651 "Assert that an overlay section is mapped.", &overlaylist);
3653 add_cmd ("unmap-overlay", class_support, unmap_overlay_command,
3654 "Assert that an overlay section is unmapped.", &overlaylist);
3656 add_cmd ("list-overlays", class_support, list_overlays_command,
3657 "List mappings of overlay sections.", &overlaylist);
3659 add_cmd ("manual", class_support, overlay_manual_command,
3660 "Enable overlay debugging.", &overlaylist);
3661 add_cmd ("off", class_support, overlay_off_command,
3662 "Disable overlay debugging.", &overlaylist);
3663 add_cmd ("auto", class_support, overlay_auto_command,
3664 "Enable automatic overlay debugging.", &overlaylist);
3665 add_cmd ("load-target", class_support, overlay_load_command,
3666 "Read the overlay mapping state from the target.", &overlaylist);
3668 /* Filename extension to source language lookup table: */
3669 init_filename_language_table ();
3670 c = add_set_cmd ("extension-language", class_files, var_string_noescape,
3672 "Set mapping between filename extension and source language.\n\
3673 Usage: set extension-language .foo bar",
3675 set_cmd_cfunc (c, set_ext_lang_command);
3677 add_info ("extensions", info_ext_lang_command,
3678 "All filename extensions associated with a source language.");
3681 (add_set_cmd ("download-write-size", class_obscure,
3682 var_integer, (char *) &download_write_size,
3683 "Set the write size used when downloading a program.\n"
3684 "Only used when downloading a program onto a remote\n"
3685 "target. Specify zero, or a negative value, to disable\n"
3686 "blocked writes. The actual size of each transfer is also\n"
3687 "limited by the size of the target packet and the memory\n"
3692 debug_file_directory = xstrdup (DEBUGDIR);
3694 ("debug-file-directory", class_support, var_string,
3695 (char *) &debug_file_directory,
3696 "Set the directory where separate debug symbols are searched for.\n"
3697 "Separate debug symbols are first searched for in the same\n"
3698 "directory as the binary, then in the `" DEBUG_SUBDIRECTORY
3700 "and lastly at the path of the directory of the binary with\n"
3701 "the global debug-file directory prepended\n",
3703 add_show_from_set (c, &showlist);
3704 set_cmd_completer (c, filename_completer);