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 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_som_som_object_present;
69 extern int hp_cxx_exception_support_initialized;
70 #define RESET_HP_UX_GLOBALS() do {\
71 hp_som_som_object_present = 0; /* indicates HP-compiled code */ \
72 hp_cxx_exception_support_initialized = 0; /* must reinitialize exception stuff */ \
76 int (*ui_load_progress_hook) (const char *section, unsigned long num);
77 void (*show_load_progress) (const char *section,
78 unsigned long section_sent,
79 unsigned long section_size,
80 unsigned long total_sent,
81 unsigned long total_size);
82 void (*pre_add_symbol_hook) (char *);
83 void (*post_add_symbol_hook) (void);
84 void (*target_new_objfile_hook) (struct objfile *);
86 static void clear_symtab_users_cleanup (void *ignore);
88 /* Global variables owned by this file */
89 int readnow_symbol_files; /* Read full symbols immediately */
91 /* External variables and functions referenced. */
93 extern void report_transfer_performance (unsigned long, time_t, time_t);
95 /* Functions this file defines */
98 static int simple_read_overlay_region_table (void);
99 static void simple_free_overlay_region_table (void);
102 static void set_initial_language (void);
104 static void load_command (char *, int);
106 static void symbol_file_add_main_1 (char *args, int from_tty, int flags);
108 static void add_symbol_file_command (char *, int);
110 static void add_shared_symbol_files_command (char *, int);
112 static void reread_separate_symbols (struct objfile *objfile);
114 static void cashier_psymtab (struct partial_symtab *);
116 bfd *symfile_bfd_open (char *);
118 int get_section_index (struct objfile *, char *);
120 static void find_sym_fns (struct objfile *);
122 static void decrement_reading_symtab (void *);
124 static void overlay_invalidate_all (void);
126 static int overlay_is_mapped (struct obj_section *);
128 void list_overlays_command (char *, int);
130 void map_overlay_command (char *, int);
132 void unmap_overlay_command (char *, int);
134 static void overlay_auto_command (char *, int);
136 static void overlay_manual_command (char *, int);
138 static void overlay_off_command (char *, int);
140 static void overlay_load_command (char *, int);
142 static void overlay_command (char *, int);
144 static void simple_free_overlay_table (void);
146 static void read_target_long_array (CORE_ADDR, unsigned int *, int);
148 static int simple_read_overlay_table (void);
150 static int simple_overlay_update_1 (struct obj_section *);
152 static void add_filename_language (char *ext, enum language lang);
154 static void set_ext_lang_command (char *args, int from_tty);
156 static void info_ext_lang_command (char *args, int from_tty);
158 static char *find_separate_debug_file (struct objfile *objfile);
160 static void init_filename_language_table (void);
162 void _initialize_symfile (void);
164 /* List of all available sym_fns. On gdb startup, each object file reader
165 calls add_symtab_fns() to register information on each format it is
168 static struct sym_fns *symtab_fns = NULL;
170 /* Flag for whether user will be reloading symbols multiple times.
171 Defaults to ON for VxWorks, otherwise OFF. */
173 #ifdef SYMBOL_RELOADING_DEFAULT
174 int symbol_reloading = SYMBOL_RELOADING_DEFAULT;
176 int symbol_reloading = 0;
179 /* If non-zero, shared library symbols will be added automatically
180 when the inferior is created, new libraries are loaded, or when
181 attaching to the inferior. This is almost always what users will
182 want to have happen; but for very large programs, the startup time
183 will be excessive, and so if this is a problem, the user can clear
184 this flag and then add the shared library symbols as needed. Note
185 that there is a potential for confusion, since if the shared
186 library symbols are not loaded, commands like "info fun" will *not*
187 report all the functions that are actually present. */
189 int auto_solib_add = 1;
191 /* For systems that support it, a threshold size in megabytes. If
192 automatically adding a new library's symbol table to those already
193 known to the debugger would cause the total shared library symbol
194 size to exceed this threshhold, then the shlib's symbols are not
195 added. The threshold is ignored if the user explicitly asks for a
196 shlib to be added, such as when using the "sharedlibrary"
199 int auto_solib_limit;
202 /* Since this function is called from within qsort, in an ANSI environment
203 it must conform to the prototype for qsort, which specifies that the
204 comparison function takes two "void *" pointers. */
207 compare_symbols (const void *s1p, const void *s2p)
209 register struct symbol **s1, **s2;
211 s1 = (struct symbol **) s1p;
212 s2 = (struct symbol **) s2p;
213 return (strcmp (SYMBOL_NATURAL_NAME (*s1), SYMBOL_NATURAL_NAME (*s2)));
216 /* This compares two partial symbols by names, using strcmp_iw_ordered
217 for the comparison. */
220 compare_psymbols (const void *s1p, const void *s2p)
222 struct partial_symbol *const *s1 = s1p;
223 struct partial_symbol *const *s2 = s2p;
225 return strcmp_iw_ordered (SYMBOL_NATURAL_NAME (*s1),
226 SYMBOL_NATURAL_NAME (*s2));
230 sort_pst_symbols (struct partial_symtab *pst)
232 /* Sort the global list; don't sort the static list */
234 qsort (pst->objfile->global_psymbols.list + pst->globals_offset,
235 pst->n_global_syms, sizeof (struct partial_symbol *),
239 /* Call sort_block_syms to sort alphabetically the symbols of one block. */
242 sort_block_syms (register struct block *b)
244 qsort (&BLOCK_SYM (b, 0), BLOCK_NSYMS (b),
245 sizeof (struct symbol *), compare_symbols);
248 /* Call sort_symtab_syms to sort alphabetically
249 the symbols of each block of one symtab. */
252 sort_symtab_syms (register struct symtab *s)
254 register struct blockvector *bv;
257 register struct block *b;
261 bv = BLOCKVECTOR (s);
262 nbl = BLOCKVECTOR_NBLOCKS (bv);
263 for (i = 0; i < nbl; i++)
265 b = BLOCKVECTOR_BLOCK (bv, i);
266 if (BLOCK_SHOULD_SORT (b))
271 /* Make a null terminated copy of the string at PTR with SIZE characters in
272 the obstack pointed to by OBSTACKP . Returns the address of the copy.
273 Note that the string at PTR does not have to be null terminated, I.E. it
274 may be part of a larger string and we are only saving a substring. */
277 obsavestring (const char *ptr, int size, struct obstack *obstackp)
279 register char *p = (char *) obstack_alloc (obstackp, size + 1);
280 /* Open-coded memcpy--saves function call time. These strings are usually
281 short. FIXME: Is this really still true with a compiler that can
284 register const char *p1 = ptr;
285 register char *p2 = p;
286 const char *end = ptr + size;
294 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
295 in the obstack pointed to by OBSTACKP. */
298 obconcat (struct obstack *obstackp, const char *s1, const char *s2,
301 register int len = strlen (s1) + strlen (s2) + strlen (s3) + 1;
302 register char *val = (char *) obstack_alloc (obstackp, len);
309 /* True if we are nested inside psymtab_to_symtab. */
311 int currently_reading_symtab = 0;
314 decrement_reading_symtab (void *dummy)
316 currently_reading_symtab--;
319 /* Get the symbol table that corresponds to a partial_symtab.
320 This is fast after the first time you do it. In fact, there
321 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
325 psymtab_to_symtab (register struct partial_symtab *pst)
327 /* If it's been looked up before, return it. */
331 /* If it has not yet been read in, read it. */
334 struct cleanup *back_to = make_cleanup (decrement_reading_symtab, NULL);
335 currently_reading_symtab++;
336 (*pst->read_symtab) (pst);
337 do_cleanups (back_to);
343 /* Initialize entry point information for this objfile. */
346 init_entry_point_info (struct objfile *objfile)
348 /* Save startup file's range of PC addresses to help blockframe.c
349 decide where the bottom of the stack is. */
351 if (bfd_get_file_flags (objfile->obfd) & EXEC_P)
353 /* Executable file -- record its entry point so we'll recognize
354 the startup file because it contains the entry point. */
355 objfile->ei.entry_point = bfd_get_start_address (objfile->obfd);
359 /* Examination of non-executable.o files. Short-circuit this stuff. */
360 objfile->ei.entry_point = INVALID_ENTRY_POINT;
362 objfile->ei.entry_file_lowpc = INVALID_ENTRY_LOWPC;
363 objfile->ei.entry_file_highpc = INVALID_ENTRY_HIGHPC;
364 objfile->ei.entry_func_lowpc = INVALID_ENTRY_LOWPC;
365 objfile->ei.entry_func_highpc = INVALID_ENTRY_HIGHPC;
366 objfile->ei.main_func_lowpc = INVALID_ENTRY_LOWPC;
367 objfile->ei.main_func_highpc = INVALID_ENTRY_HIGHPC;
370 /* Get current entry point address. */
373 entry_point_address (void)
375 return symfile_objfile ? symfile_objfile->ei.entry_point : 0;
378 /* Remember the lowest-addressed loadable section we've seen.
379 This function is called via bfd_map_over_sections.
381 In case of equal vmas, the section with the largest size becomes the
382 lowest-addressed loadable section.
384 If the vmas and sizes are equal, the last section is considered the
385 lowest-addressed loadable section. */
388 find_lowest_section (bfd *abfd, asection *sect, void *obj)
390 asection **lowest = (asection **) obj;
392 if (0 == (bfd_get_section_flags (abfd, sect) & SEC_LOAD))
395 *lowest = sect; /* First loadable section */
396 else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect))
397 *lowest = sect; /* A lower loadable section */
398 else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect)
399 && (bfd_section_size (abfd, (*lowest))
400 <= bfd_section_size (abfd, sect)))
405 /* Build (allocate and populate) a section_addr_info struct from
406 an existing section table. */
408 extern struct section_addr_info *
409 build_section_addr_info_from_section_table (const struct section_table *start,
410 const struct section_table *end)
412 struct section_addr_info *sap;
413 const struct section_table *stp;
416 sap = xmalloc (sizeof (struct section_addr_info));
417 memset (sap, 0, sizeof (struct section_addr_info));
419 for (stp = start, oidx = 0; stp != end; stp++)
421 if (bfd_get_section_flags (stp->bfd,
422 stp->the_bfd_section) & (SEC_ALLOC | SEC_LOAD)
423 && oidx < MAX_SECTIONS)
425 sap->other[oidx].addr = stp->addr;
426 sap->other[oidx].name
427 = xstrdup (bfd_section_name (stp->bfd, stp->the_bfd_section));
428 sap->other[oidx].sectindex = stp->the_bfd_section->index;
437 /* Free all memory allocated by build_section_addr_info_from_section_table. */
440 free_section_addr_info (struct section_addr_info *sap)
444 for (idx = 0; idx < MAX_SECTIONS; idx++)
445 if (sap->other[idx].name)
446 xfree (sap->other[idx].name);
451 /* Initialize OBJFILE's sect_index_* members. */
453 init_objfile_sect_indices (struct objfile *objfile)
458 sect = bfd_get_section_by_name (objfile->obfd, ".text");
460 objfile->sect_index_text = sect->index;
462 sect = bfd_get_section_by_name (objfile->obfd, ".data");
464 objfile->sect_index_data = sect->index;
466 sect = bfd_get_section_by_name (objfile->obfd, ".bss");
468 objfile->sect_index_bss = sect->index;
470 sect = bfd_get_section_by_name (objfile->obfd, ".rodata");
472 objfile->sect_index_rodata = sect->index;
474 /* This is where things get really weird... We MUST have valid
475 indices for the various sect_index_* members or gdb will abort.
476 So if for example, there is no ".text" section, we have to
477 accomodate that. Except when explicitly adding symbol files at
478 some address, section_offsets contains nothing but zeros, so it
479 doesn't matter which slot in section_offsets the individual
480 sect_index_* members index into. So if they are all zero, it is
481 safe to just point all the currently uninitialized indices to the
484 for (i = 0; i < objfile->num_sections; i++)
486 if (ANOFFSET (objfile->section_offsets, i) != 0)
491 if (i == objfile->num_sections)
493 if (objfile->sect_index_text == -1)
494 objfile->sect_index_text = 0;
495 if (objfile->sect_index_data == -1)
496 objfile->sect_index_data = 0;
497 if (objfile->sect_index_bss == -1)
498 objfile->sect_index_bss = 0;
499 if (objfile->sect_index_rodata == -1)
500 objfile->sect_index_rodata = 0;
505 /* Parse the user's idea of an offset for dynamic linking, into our idea
506 of how to represent it for fast symbol reading. This is the default
507 version of the sym_fns.sym_offsets function for symbol readers that
508 don't need to do anything special. It allocates a section_offsets table
509 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
512 default_symfile_offsets (struct objfile *objfile,
513 struct section_addr_info *addrs)
517 objfile->num_sections = SECT_OFF_MAX;
518 objfile->section_offsets = (struct section_offsets *)
519 obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS);
520 memset (objfile->section_offsets, 0, SIZEOF_SECTION_OFFSETS);
522 /* Now calculate offsets for section that were specified by the
524 for (i = 0; i < MAX_SECTIONS && addrs->other[i].name; i++)
526 struct other_sections *osp ;
528 osp = &addrs->other[i] ;
532 /* Record all sections in offsets */
533 /* The section_offsets in the objfile are here filled in using
535 (objfile->section_offsets)->offsets[osp->sectindex] = osp->addr;
538 /* Remember the bfd indexes for the .text, .data, .bss and
540 init_objfile_sect_indices (objfile);
544 /* Process a symbol file, as either the main file or as a dynamically
547 OBJFILE is where the symbols are to be read from.
549 ADDRS is the list of section load addresses. If the user has given
550 an 'add-symbol-file' command, then this is the list of offsets and
551 addresses he or she provided as arguments to the command; or, if
552 we're handling a shared library, these are the actual addresses the
553 sections are loaded at, according to the inferior's dynamic linker
554 (as gleaned by GDB's shared library code). We convert each address
555 into an offset from the section VMA's as it appears in the object
556 file, and then call the file's sym_offsets function to convert this
557 into a format-specific offset table --- a `struct section_offsets'.
558 If ADDRS is non-zero, OFFSETS must be zero.
560 OFFSETS is a table of section offsets already in the right
561 format-specific representation. NUM_OFFSETS is the number of
562 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
563 assume this is the proper table the call to sym_offsets described
564 above would produce. Instead of calling sym_offsets, we just dump
565 it right into objfile->section_offsets. (When we're re-reading
566 symbols from an objfile, we don't have the original load address
567 list any more; all we have is the section offset table.) If
568 OFFSETS is non-zero, ADDRS must be zero.
570 MAINLINE is nonzero if this is the main symbol file, or zero if
571 it's an extra symbol file such as dynamically loaded code.
573 VERBO is nonzero if the caller has printed a verbose message about
574 the symbol reading (and complaints can be more terse about it). */
577 syms_from_objfile (struct objfile *objfile,
578 struct section_addr_info *addrs,
579 struct section_offsets *offsets,
584 asection *lower_sect;
586 CORE_ADDR lower_offset;
587 struct section_addr_info local_addr;
588 struct cleanup *old_chain;
591 gdb_assert (! (addrs && offsets));
593 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
594 list. We now establish the convention that an addr of zero means
595 no load address was specified. */
596 if (! addrs && ! offsets)
598 memset (&local_addr, 0, sizeof (local_addr));
602 /* Now either addrs or offsets is non-zero. */
604 init_entry_point_info (objfile);
605 find_sym_fns (objfile);
607 if (objfile->sf == NULL)
608 return; /* No symbols. */
610 /* Make sure that partially constructed symbol tables will be cleaned up
611 if an error occurs during symbol reading. */
612 old_chain = make_cleanup_free_objfile (objfile);
616 /* We will modify the main symbol table, make sure that all its users
617 will be cleaned up if an error occurs during symbol reading. */
618 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
620 /* Since no error yet, throw away the old symbol table. */
622 if (symfile_objfile != NULL)
624 free_objfile (symfile_objfile);
625 symfile_objfile = NULL;
628 /* Currently we keep symbols from the add-symbol-file command.
629 If the user wants to get rid of them, they should do "symbol-file"
630 without arguments first. Not sure this is the best behavior
633 (*objfile->sf->sym_new_init) (objfile);
636 /* Convert addr into an offset rather than an absolute address.
637 We find the lowest address of a loaded segment in the objfile,
638 and assume that <addr> is where that got loaded.
640 We no longer warn if the lowest section is not a text segment (as
641 happens for the PA64 port. */
644 /* Find lowest loadable section to be used as starting point for
645 continguous sections. FIXME!! won't work without call to find
646 .text first, but this assumes text is lowest section. */
647 lower_sect = bfd_get_section_by_name (objfile->obfd, ".text");
648 if (lower_sect == NULL)
649 bfd_map_over_sections (objfile->obfd, find_lowest_section,
651 if (lower_sect == NULL)
652 warning ("no loadable sections found in added symbol-file %s",
655 if ((bfd_get_section_flags (objfile->obfd, lower_sect) & SEC_CODE) == 0)
656 warning ("Lowest section in %s is %s at %s",
658 bfd_section_name (objfile->obfd, lower_sect),
659 paddr (bfd_section_vma (objfile->obfd, lower_sect)));
660 if (lower_sect != NULL)
661 lower_offset = bfd_section_vma (objfile->obfd, lower_sect);
665 /* Calculate offsets for the loadable sections.
666 FIXME! Sections must be in order of increasing loadable section
667 so that contiguous sections can use the lower-offset!!!
669 Adjust offsets if the segments are not contiguous.
670 If the section is contiguous, its offset should be set to
671 the offset of the highest loadable section lower than it
672 (the loadable section directly below it in memory).
673 this_offset = lower_offset = lower_addr - lower_orig_addr */
675 /* Calculate offsets for sections. */
677 for (i=0 ; i < MAX_SECTIONS && addrs->other[i].name; i++)
679 if (addrs->other[i].addr != 0)
681 sect = bfd_get_section_by_name (objfile->obfd,
682 addrs->other[i].name);
686 -= bfd_section_vma (objfile->obfd, sect);
687 lower_offset = addrs->other[i].addr;
688 /* This is the index used by BFD. */
689 addrs->other[i].sectindex = sect->index ;
693 warning ("section %s not found in %s",
694 addrs->other[i].name,
696 addrs->other[i].addr = 0;
700 addrs->other[i].addr = lower_offset;
704 /* Initialize symbol reading routines for this objfile, allow complaints to
705 appear for this new file, and record how verbose to be, then do the
706 initial symbol reading for this file. */
708 (*objfile->sf->sym_init) (objfile);
709 clear_complaints (&symfile_complaints, 1, verbo);
712 (*objfile->sf->sym_offsets) (objfile, addrs);
715 size_t size = SIZEOF_N_SECTION_OFFSETS (num_offsets);
717 /* Just copy in the offset table directly as given to us. */
718 objfile->num_sections = num_offsets;
719 objfile->section_offsets
720 = ((struct section_offsets *)
721 obstack_alloc (&objfile->psymbol_obstack, size));
722 memcpy (objfile->section_offsets, offsets, size);
724 init_objfile_sect_indices (objfile);
727 #ifndef IBM6000_TARGET
728 /* This is a SVR4/SunOS specific hack, I think. In any event, it
729 screws RS/6000. sym_offsets should be doing this sort of thing,
730 because it knows the mapping between bfd sections and
732 /* This is a hack. As far as I can tell, section offsets are not
733 target dependent. They are all set to addr with a couple of
734 exceptions. The exceptions are sysvr4 shared libraries, whose
735 offsets are kept in solib structures anyway and rs6000 xcoff
736 which handles shared libraries in a completely unique way.
738 Section offsets are built similarly, except that they are built
739 by adding addr in all cases because there is no clear mapping
740 from section_offsets into actual sections. Note that solib.c
741 has a different algorithm for finding section offsets.
743 These should probably all be collapsed into some target
744 independent form of shared library support. FIXME. */
748 struct obj_section *s;
750 /* Map section offsets in "addr" back to the object's
751 sections by comparing the section names with bfd's
752 section names. Then adjust the section address by
753 the offset. */ /* for gdb/13815 */
755 ALL_OBJFILE_OSECTIONS (objfile, s)
757 CORE_ADDR s_addr = 0;
761 !s_addr && i < MAX_SECTIONS && addrs->other[i].name;
763 if (strcmp (bfd_section_name (s->objfile->obfd,
765 addrs->other[i].name) == 0)
766 s_addr = addrs->other[i].addr; /* end added for gdb/13815 */
768 s->addr -= s->offset;
770 s->endaddr -= s->offset;
771 s->endaddr += s_addr;
775 #endif /* not IBM6000_TARGET */
777 (*objfile->sf->sym_read) (objfile, mainline);
779 /* Don't allow char * to have a typename (else would get caddr_t).
780 Ditto void *. FIXME: Check whether this is now done by all the
781 symbol readers themselves (many of them now do), and if so remove
784 TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0;
785 TYPE_NAME (lookup_pointer_type (builtin_type_void)) = 0;
787 /* Mark the objfile has having had initial symbol read attempted. Note
788 that this does not mean we found any symbols... */
790 objfile->flags |= OBJF_SYMS;
792 /* Discard cleanups as symbol reading was successful. */
794 discard_cleanups (old_chain);
797 /* Perform required actions after either reading in the initial
798 symbols for a new objfile, or mapping in the symbols from a reusable
802 new_symfile_objfile (struct objfile *objfile, int mainline, int verbo)
805 /* If this is the main symbol file we have to clean up all users of the
806 old main symbol file. Otherwise it is sufficient to fixup all the
807 breakpoints that may have been redefined by this symbol file. */
810 /* OK, make it the "real" symbol file. */
811 symfile_objfile = objfile;
813 clear_symtab_users ();
817 breakpoint_re_set ();
820 /* We're done reading the symbol file; finish off complaints. */
821 clear_complaints (&symfile_complaints, 0, verbo);
824 /* Process a symbol file, as either the main file or as a dynamically
827 NAME is the file name (which will be tilde-expanded and made
828 absolute herein) (but we don't free or modify NAME itself).
830 FROM_TTY says how verbose to be.
832 MAINLINE specifies whether this is the main symbol file, or whether
833 it's an extra symbol file such as dynamically loaded code.
835 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
836 syms_from_objfile, above. ADDRS is ignored when MAINLINE is
839 Upon success, returns a pointer to the objfile that was added.
840 Upon failure, jumps back to command level (never returns). */
841 static struct objfile *
842 symbol_file_add_with_addrs_or_offsets (char *name, int from_tty,
843 struct section_addr_info *addrs,
844 struct section_offsets *offsets,
846 int mainline, int flags)
848 struct objfile *objfile;
849 struct partial_symtab *psymtab;
852 struct section_addr_info orig_addrs;
857 /* Open a bfd for the file, and give user a chance to burp if we'd be
858 interactively wiping out any existing symbols. */
860 abfd = symfile_bfd_open (name);
862 if ((have_full_symbols () || have_partial_symbols ())
865 && !query ("Load new symbol table from \"%s\"? ", name))
866 error ("Not confirmed.");
868 objfile = allocate_objfile (abfd, flags);
870 /* If the objfile uses a mapped symbol file, and we have a psymtab for
871 it, then skip reading any symbols at this time. */
873 if ((objfile->flags & OBJF_MAPPED) && (objfile->flags & OBJF_SYMS))
875 /* We mapped in an existing symbol table file that already has had
876 initial symbol reading performed, so we can skip that part. Notify
877 the user that instead of reading the symbols, they have been mapped.
879 if (from_tty || info_verbose)
881 printf_filtered ("Mapped symbols for %s...", name);
883 gdb_flush (gdb_stdout);
885 init_entry_point_info (objfile);
886 find_sym_fns (objfile);
890 /* We either created a new mapped symbol table, mapped an existing
891 symbol table file which has not had initial symbol reading
892 performed, or need to read an unmapped symbol table. */
893 if (from_tty || info_verbose)
895 if (pre_add_symbol_hook)
896 pre_add_symbol_hook (name);
899 printf_filtered ("Reading symbols from %s...", name);
901 gdb_flush (gdb_stdout);
904 syms_from_objfile (objfile, addrs, offsets, num_offsets,
908 /* We now have at least a partial symbol table. Check to see if the
909 user requested that all symbols be read on initial access via either
910 the gdb startup command line or on a per symbol file basis. Expand
911 all partial symbol tables for this objfile if so. */
913 if ((flags & OBJF_READNOW) || readnow_symbol_files)
915 if (from_tty || info_verbose)
917 printf_filtered ("expanding to full symbols...");
919 gdb_flush (gdb_stdout);
922 for (psymtab = objfile->psymtabs;
924 psymtab = psymtab->next)
926 psymtab_to_symtab (psymtab);
930 debugfile = find_separate_debug_file (objfile);
935 objfile->separate_debug_objfile
936 = symbol_file_add (debugfile, from_tty, &orig_addrs, 0, flags);
940 objfile->separate_debug_objfile
941 = symbol_file_add (debugfile, from_tty, NULL, 0, flags);
943 objfile->separate_debug_objfile->separate_debug_objfile_backlink
946 /* Put the separate debug object before the normal one, this is so that
947 usage of the ALL_OBJFILES_SAFE macro will stay safe. */
948 put_objfile_before (objfile->separate_debug_objfile, objfile);
953 if (!have_partial_symbols () && !have_full_symbols ())
956 printf_filtered ("(no debugging symbols found)...");
960 if (from_tty || info_verbose)
962 if (post_add_symbol_hook)
963 post_add_symbol_hook ();
966 printf_filtered ("done.\n");
970 /* We print some messages regardless of whether 'from_tty ||
971 info_verbose' is true, so make sure they go out at the right
973 gdb_flush (gdb_stdout);
975 if (objfile->sf == NULL)
976 return objfile; /* No symbols. */
978 new_symfile_objfile (objfile, mainline, from_tty);
980 if (target_new_objfile_hook)
981 target_new_objfile_hook (objfile);
987 /* Process a symbol file, as either the main file or as a dynamically
988 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
991 symbol_file_add (char *name, int from_tty, struct section_addr_info *addrs,
992 int mainline, int flags)
994 return symbol_file_add_with_addrs_or_offsets (name, from_tty, addrs, 0, 0,
999 /* Call symbol_file_add() with default values and update whatever is
1000 affected by the loading of a new main().
1001 Used when the file is supplied in the gdb command line
1002 and by some targets with special loading requirements.
1003 The auxiliary function, symbol_file_add_main_1(), has the flags
1004 argument for the switches that can only be specified in the symbol_file
1008 symbol_file_add_main (char *args, int from_tty)
1010 symbol_file_add_main_1 (args, from_tty, 0);
1014 symbol_file_add_main_1 (char *args, int from_tty, int flags)
1016 symbol_file_add (args, from_tty, NULL, 1, flags);
1019 RESET_HP_UX_GLOBALS ();
1022 /* Getting new symbols may change our opinion about
1023 what is frameless. */
1024 reinit_frame_cache ();
1026 set_initial_language ();
1030 symbol_file_clear (int from_tty)
1032 if ((have_full_symbols () || have_partial_symbols ())
1034 && !query ("Discard symbol table from `%s'? ",
1035 symfile_objfile->name))
1036 error ("Not confirmed.");
1037 free_all_objfiles ();
1039 /* solib descriptors may have handles to objfiles. Since their
1040 storage has just been released, we'd better wipe the solib
1041 descriptors as well.
1043 #if defined(SOLIB_RESTART)
1047 symfile_objfile = NULL;
1049 printf_unfiltered ("No symbol file now.\n");
1051 RESET_HP_UX_GLOBALS ();
1056 get_debug_link_info (struct objfile *objfile, unsigned long *crc32_out)
1059 bfd_size_type debuglink_size;
1060 unsigned long crc32;
1065 sect = bfd_get_section_by_name (objfile->obfd, ".gnu_debuglink");
1070 debuglink_size = bfd_section_size (objfile->obfd, sect);
1072 contents = xmalloc (debuglink_size);
1073 bfd_get_section_contents (objfile->obfd, sect, contents,
1074 (file_ptr)0, (bfd_size_type)debuglink_size);
1076 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1077 crc_offset = strlen (contents) + 1;
1078 crc_offset = (crc_offset + 3) & ~3;
1080 crc32 = bfd_get_32 (objfile->obfd, (bfd_byte *) (contents + crc_offset));
1087 separate_debug_file_exists (const char *name, unsigned long crc)
1089 unsigned long file_crc = 0;
1091 char buffer[8*1024];
1094 fd = open (name, O_RDONLY | O_BINARY);
1098 while ((count = read (fd, buffer, sizeof (buffer))) > 0)
1099 file_crc = gnu_debuglink_crc32 (file_crc, buffer, count);
1103 return crc == file_crc;
1106 static char *debug_file_directory = NULL;
1108 #if ! defined (DEBUG_SUBDIRECTORY)
1109 #define DEBUG_SUBDIRECTORY ".debug"
1113 find_separate_debug_file (struct objfile *objfile)
1120 bfd_size_type debuglink_size;
1121 unsigned long crc32;
1124 basename = get_debug_link_info (objfile, &crc32);
1126 if (basename == NULL)
1129 dir = xstrdup (objfile->name);
1131 /* Strip off the final filename part, leaving the directory name,
1132 followed by a slash. Objfile names should always be absolute and
1133 tilde-expanded, so there should always be a slash in there
1135 for (i = strlen(dir) - 1; i >= 0; i--)
1137 if (IS_DIR_SEPARATOR (dir[i]))
1140 gdb_assert (i >= 0 && IS_DIR_SEPARATOR (dir[i]));
1143 debugfile = alloca (strlen (debug_file_directory) + 1
1145 + strlen (DEBUG_SUBDIRECTORY)
1150 /* First try in the same directory as the original file. */
1151 strcpy (debugfile, dir);
1152 strcat (debugfile, basename);
1154 if (separate_debug_file_exists (debugfile, crc32))
1158 return xstrdup (debugfile);
1161 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1162 strcpy (debugfile, dir);
1163 strcat (debugfile, DEBUG_SUBDIRECTORY);
1164 strcat (debugfile, "/");
1165 strcat (debugfile, basename);
1167 if (separate_debug_file_exists (debugfile, crc32))
1171 return xstrdup (debugfile);
1174 /* Then try in the global debugfile directory. */
1175 strcpy (debugfile, debug_file_directory);
1176 strcat (debugfile, "/");
1177 strcat (debugfile, dir);
1178 strcat (debugfile, basename);
1180 if (separate_debug_file_exists (debugfile, crc32))
1184 return xstrdup (debugfile);
1193 /* This is the symbol-file command. Read the file, analyze its
1194 symbols, and add a struct symtab to a symtab list. The syntax of
1195 the command is rather bizarre--(1) buildargv implements various
1196 quoting conventions which are undocumented and have little or
1197 nothing in common with the way things are quoted (or not quoted)
1198 elsewhere in GDB, (2) options are used, which are not generally
1199 used in GDB (perhaps "set mapped on", "set readnow on" would be
1200 better), (3) the order of options matters, which is contrary to GNU
1201 conventions (because it is confusing and inconvenient). */
1202 /* Note: ezannoni 2000-04-17. This function used to have support for
1203 rombug (see remote-os9k.c). It consisted of a call to target_link()
1204 (target.c) to get the address of the text segment from the target,
1205 and pass that to symbol_file_add(). This is no longer supported. */
1208 symbol_file_command (char *args, int from_tty)
1212 struct cleanup *cleanups;
1213 int flags = OBJF_USERLOADED;
1219 symbol_file_clear (from_tty);
1223 if ((argv = buildargv (args)) == NULL)
1227 cleanups = make_cleanup_freeargv (argv);
1228 while (*argv != NULL)
1230 if (STREQ (*argv, "-mapped"))
1231 flags |= OBJF_MAPPED;
1233 if (STREQ (*argv, "-readnow"))
1234 flags |= OBJF_READNOW;
1237 error ("unknown option `%s'", *argv);
1242 symbol_file_add_main_1 (name, from_tty, flags);
1249 error ("no symbol file name was specified");
1251 do_cleanups (cleanups);
1255 /* Set the initial language.
1257 A better solution would be to record the language in the psymtab when reading
1258 partial symbols, and then use it (if known) to set the language. This would
1259 be a win for formats that encode the language in an easily discoverable place,
1260 such as DWARF. For stabs, we can jump through hoops looking for specially
1261 named symbols or try to intuit the language from the specific type of stabs
1262 we find, but we can't do that until later when we read in full symbols.
1266 set_initial_language (void)
1268 struct partial_symtab *pst;
1269 enum language lang = language_unknown;
1271 pst = find_main_psymtab ();
1274 if (pst->filename != NULL)
1276 lang = deduce_language_from_filename (pst->filename);
1278 if (lang == language_unknown)
1280 /* Make C the default language */
1283 set_language (lang);
1284 expected_language = current_language; /* Don't warn the user */
1288 /* Open file specified by NAME and hand it off to BFD for preliminary
1289 analysis. Result is a newly initialized bfd *, which includes a newly
1290 malloc'd` copy of NAME (tilde-expanded and made absolute).
1291 In case of trouble, error() is called. */
1294 symfile_bfd_open (char *name)
1298 char *absolute_name;
1302 name = tilde_expand (name); /* Returns 1st new malloc'd copy */
1304 /* Look down path for it, allocate 2nd new malloc'd copy. */
1305 desc = openp (getenv ("PATH"), 1, name, O_RDONLY | O_BINARY, 0, &absolute_name);
1306 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1309 char *exename = alloca (strlen (name) + 5);
1310 strcat (strcpy (exename, name), ".exe");
1311 desc = openp (getenv ("PATH"), 1, exename, O_RDONLY | O_BINARY,
1317 make_cleanup (xfree, name);
1318 perror_with_name (name);
1320 xfree (name); /* Free 1st new malloc'd copy */
1321 name = absolute_name; /* Keep 2nd malloc'd copy in bfd */
1322 /* It'll be freed in free_objfile(). */
1324 sym_bfd = bfd_fdopenr (name, gnutarget, desc);
1328 make_cleanup (xfree, name);
1329 error ("\"%s\": can't open to read symbols: %s.", name,
1330 bfd_errmsg (bfd_get_error ()));
1332 sym_bfd->cacheable = 1;
1334 if (!bfd_check_format (sym_bfd, bfd_object))
1336 /* FIXME: should be checking for errors from bfd_close (for one thing,
1337 on error it does not free all the storage associated with the
1339 bfd_close (sym_bfd); /* This also closes desc */
1340 make_cleanup (xfree, name);
1341 error ("\"%s\": can't read symbols: %s.", name,
1342 bfd_errmsg (bfd_get_error ()));
1347 /* Return the section index for the given section name. Return -1 if
1348 the section was not found. */
1350 get_section_index (struct objfile *objfile, char *section_name)
1352 asection *sect = bfd_get_section_by_name (objfile->obfd, section_name);
1359 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1360 startup by the _initialize routine in each object file format reader,
1361 to register information about each format the the reader is prepared
1365 add_symtab_fns (struct sym_fns *sf)
1367 sf->next = symtab_fns;
1372 /* Initialize to read symbols from the symbol file sym_bfd. It either
1373 returns or calls error(). The result is an initialized struct sym_fns
1374 in the objfile structure, that contains cached information about the
1378 find_sym_fns (struct objfile *objfile)
1381 enum bfd_flavour our_flavour = bfd_get_flavour (objfile->obfd);
1382 char *our_target = bfd_get_target (objfile->obfd);
1384 if (our_flavour == bfd_target_srec_flavour
1385 || our_flavour == bfd_target_ihex_flavour
1386 || our_flavour == bfd_target_tekhex_flavour)
1387 return; /* No symbols. */
1389 /* Special kludge for apollo. See dstread.c. */
1390 if (STREQN (our_target, "apollo", 6))
1391 our_flavour = (enum bfd_flavour) -2;
1393 for (sf = symtab_fns; sf != NULL; sf = sf->next)
1395 if (our_flavour == sf->sym_flavour)
1401 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
1402 bfd_get_target (objfile->obfd));
1405 /* This function runs the load command of our current target. */
1408 load_command (char *arg, int from_tty)
1411 arg = get_exec_file (1);
1412 target_load (arg, from_tty);
1414 /* After re-loading the executable, we don't really know which
1415 overlays are mapped any more. */
1416 overlay_cache_invalid = 1;
1419 /* This version of "load" should be usable for any target. Currently
1420 it is just used for remote targets, not inftarg.c or core files,
1421 on the theory that only in that case is it useful.
1423 Avoiding xmodem and the like seems like a win (a) because we don't have
1424 to worry about finding it, and (b) On VMS, fork() is very slow and so
1425 we don't want to run a subprocess. On the other hand, I'm not sure how
1426 performance compares. */
1428 static int download_write_size = 512;
1429 static int validate_download = 0;
1431 /* Callback service function for generic_load (bfd_map_over_sections). */
1434 add_section_size_callback (bfd *abfd, asection *asec, void *data)
1436 bfd_size_type *sum = data;
1438 *sum += bfd_get_section_size_before_reloc (asec);
1441 /* Opaque data for load_section_callback. */
1442 struct load_section_data {
1443 unsigned long load_offset;
1444 unsigned long write_count;
1445 unsigned long data_count;
1446 bfd_size_type total_size;
1449 /* Callback service function for generic_load (bfd_map_over_sections). */
1452 load_section_callback (bfd *abfd, asection *asec, void *data)
1454 struct load_section_data *args = data;
1456 if (bfd_get_section_flags (abfd, asec) & SEC_LOAD)
1458 bfd_size_type size = bfd_get_section_size_before_reloc (asec);
1462 struct cleanup *old_chain;
1463 CORE_ADDR lma = bfd_section_lma (abfd, asec) + args->load_offset;
1464 bfd_size_type block_size;
1466 const char *sect_name = bfd_get_section_name (abfd, asec);
1469 if (download_write_size > 0 && size > download_write_size)
1470 block_size = download_write_size;
1474 buffer = xmalloc (size);
1475 old_chain = make_cleanup (xfree, buffer);
1477 /* Is this really necessary? I guess it gives the user something
1478 to look at during a long download. */
1479 ui_out_message (uiout, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1480 sect_name, paddr_nz (size), paddr_nz (lma));
1482 bfd_get_section_contents (abfd, asec, buffer, 0, size);
1488 bfd_size_type this_transfer = size - sent;
1490 if (this_transfer >= block_size)
1491 this_transfer = block_size;
1492 len = target_write_memory_partial (lma, buffer,
1493 this_transfer, &err);
1496 if (validate_download)
1498 /* Broken memories and broken monitors manifest
1499 themselves here when bring new computers to
1500 life. This doubles already slow downloads. */
1501 /* NOTE: cagney/1999-10-18: A more efficient
1502 implementation might add a verify_memory()
1503 method to the target vector and then use
1504 that. remote.c could implement that method
1505 using the ``qCRC'' packet. */
1506 char *check = xmalloc (len);
1507 struct cleanup *verify_cleanups =
1508 make_cleanup (xfree, check);
1510 if (target_read_memory (lma, check, len) != 0)
1511 error ("Download verify read failed at 0x%s",
1513 if (memcmp (buffer, check, len) != 0)
1514 error ("Download verify compare failed at 0x%s",
1516 do_cleanups (verify_cleanups);
1518 args->data_count += len;
1521 args->write_count += 1;
1524 || (ui_load_progress_hook != NULL
1525 && ui_load_progress_hook (sect_name, sent)))
1526 error ("Canceled the download");
1528 if (show_load_progress != NULL)
1529 show_load_progress (sect_name, sent, size,
1530 args->data_count, args->total_size);
1532 while (sent < size);
1535 error ("Memory access error while loading section %s.", sect_name);
1537 do_cleanups (old_chain);
1543 generic_load (char *args, int from_tty)
1547 time_t start_time, end_time; /* Start and end times of download */
1549 struct cleanup *old_cleanups;
1551 struct load_section_data cbdata;
1554 cbdata.load_offset = 0; /* Offset to add to vma for each section. */
1555 cbdata.write_count = 0; /* Number of writes needed. */
1556 cbdata.data_count = 0; /* Number of bytes written to target memory. */
1557 cbdata.total_size = 0; /* Total size of all bfd sectors. */
1559 /* Parse the input argument - the user can specify a load offset as
1560 a second argument. */
1561 filename = xmalloc (strlen (args) + 1);
1562 old_cleanups = make_cleanup (xfree, filename);
1563 strcpy (filename, args);
1564 offptr = strchr (filename, ' ');
1569 cbdata.load_offset = strtoul (offptr, &endptr, 0);
1570 if (offptr == endptr)
1571 error ("Invalid download offset:%s\n", offptr);
1575 cbdata.load_offset = 0;
1577 /* Open the file for loading. */
1578 loadfile_bfd = bfd_openr (filename, gnutarget);
1579 if (loadfile_bfd == NULL)
1581 perror_with_name (filename);
1585 /* FIXME: should be checking for errors from bfd_close (for one thing,
1586 on error it does not free all the storage associated with the
1588 make_cleanup_bfd_close (loadfile_bfd);
1590 if (!bfd_check_format (loadfile_bfd, bfd_object))
1592 error ("\"%s\" is not an object file: %s", filename,
1593 bfd_errmsg (bfd_get_error ()));
1596 bfd_map_over_sections (loadfile_bfd, add_section_size_callback,
1597 (void *) &cbdata.total_size);
1599 start_time = time (NULL);
1601 bfd_map_over_sections (loadfile_bfd, load_section_callback, &cbdata);
1603 end_time = time (NULL);
1605 entry = bfd_get_start_address (loadfile_bfd);
1606 ui_out_text (uiout, "Start address ");
1607 ui_out_field_fmt (uiout, "address", "0x%s", paddr_nz (entry));
1608 ui_out_text (uiout, ", load size ");
1609 ui_out_field_fmt (uiout, "load-size", "%lu", cbdata.data_count);
1610 ui_out_text (uiout, "\n");
1611 /* We were doing this in remote-mips.c, I suspect it is right
1612 for other targets too. */
1615 /* FIXME: are we supposed to call symbol_file_add or not? According
1616 to a comment from remote-mips.c (where a call to symbol_file_add
1617 was commented out), making the call confuses GDB if more than one
1618 file is loaded in. Some targets do (e.g., remote-vx.c) but
1619 others don't (or didn't - perhaphs they have all been deleted). */
1621 print_transfer_performance (gdb_stdout, cbdata.data_count,
1622 cbdata.write_count, end_time - start_time);
1624 do_cleanups (old_cleanups);
1627 /* Report how fast the transfer went. */
1629 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1630 replaced by print_transfer_performance (with a very different
1631 function signature). */
1634 report_transfer_performance (unsigned long data_count, time_t start_time,
1637 print_transfer_performance (gdb_stdout, data_count,
1638 end_time - start_time, 0);
1642 print_transfer_performance (struct ui_file *stream,
1643 unsigned long data_count,
1644 unsigned long write_count,
1645 unsigned long time_count)
1647 ui_out_text (uiout, "Transfer rate: ");
1650 ui_out_field_fmt (uiout, "transfer-rate", "%lu",
1651 (data_count * 8) / time_count);
1652 ui_out_text (uiout, " bits/sec");
1656 ui_out_field_fmt (uiout, "transferred-bits", "%lu", (data_count * 8));
1657 ui_out_text (uiout, " bits in <1 sec");
1659 if (write_count > 0)
1661 ui_out_text (uiout, ", ");
1662 ui_out_field_fmt (uiout, "write-rate", "%lu", data_count / write_count);
1663 ui_out_text (uiout, " bytes/write");
1665 ui_out_text (uiout, ".\n");
1668 /* This function allows the addition of incrementally linked object files.
1669 It does not modify any state in the target, only in the debugger. */
1670 /* Note: ezannoni 2000-04-13 This function/command used to have a
1671 special case syntax for the rombug target (Rombug is the boot
1672 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
1673 rombug case, the user doesn't need to supply a text address,
1674 instead a call to target_link() (in target.c) would supply the
1675 value to use. We are now discontinuing this type of ad hoc syntax. */
1679 add_symbol_file_command (char *args, int from_tty)
1681 char *filename = NULL;
1682 int flags = OBJF_USERLOADED;
1684 int expecting_option = 0;
1685 int section_index = 0;
1689 int expecting_sec_name = 0;
1690 int expecting_sec_addr = 0;
1696 } sect_opts[SECT_OFF_MAX];
1698 struct section_addr_info section_addrs;
1699 struct cleanup *my_cleanups = make_cleanup (null_cleanup, NULL);
1704 error ("add-symbol-file takes a file name and an address");
1706 /* Make a copy of the string that we can safely write into. */
1707 args = xstrdup (args);
1709 /* Ensure section_addrs is initialized */
1710 memset (§ion_addrs, 0, sizeof (section_addrs));
1712 while (*args != '\000')
1714 /* Any leading spaces? */
1715 while (isspace (*args))
1718 /* Point arg to the beginning of the argument. */
1721 /* Move args pointer over the argument. */
1722 while ((*args != '\000') && !isspace (*args))
1725 /* If there are more arguments, terminate arg and
1727 if (*args != '\000')
1730 /* Now process the argument. */
1733 /* The first argument is the file name. */
1734 filename = tilde_expand (arg);
1735 make_cleanup (xfree, filename);
1740 /* The second argument is always the text address at which
1741 to load the program. */
1742 sect_opts[section_index].name = ".text";
1743 sect_opts[section_index].value = arg;
1748 /* It's an option (starting with '-') or it's an argument
1753 if (strcmp (arg, "-mapped") == 0)
1754 flags |= OBJF_MAPPED;
1756 if (strcmp (arg, "-readnow") == 0)
1757 flags |= OBJF_READNOW;
1759 if (strcmp (arg, "-s") == 0)
1761 if (section_index >= SECT_OFF_MAX)
1762 error ("Too many sections specified.");
1763 expecting_sec_name = 1;
1764 expecting_sec_addr = 1;
1769 if (expecting_sec_name)
1771 sect_opts[section_index].name = arg;
1772 expecting_sec_name = 0;
1775 if (expecting_sec_addr)
1777 sect_opts[section_index].value = arg;
1778 expecting_sec_addr = 0;
1782 error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*");
1788 /* Print the prompt for the query below. And save the arguments into
1789 a sect_addr_info structure to be passed around to other
1790 functions. We have to split this up into separate print
1791 statements because local_hex_string returns a local static
1794 printf_filtered ("add symbol table from file \"%s\" at\n", filename);
1795 for (i = 0; i < section_index; i++)
1798 char *val = sect_opts[i].value;
1799 char *sec = sect_opts[i].name;
1801 val = sect_opts[i].value;
1802 if (val[0] == '0' && val[1] == 'x')
1803 addr = strtoul (val+2, NULL, 16);
1805 addr = strtoul (val, NULL, 10);
1807 /* Here we store the section offsets in the order they were
1808 entered on the command line. */
1809 section_addrs.other[sec_num].name = sec;
1810 section_addrs.other[sec_num].addr = addr;
1811 printf_filtered ("\t%s_addr = %s\n",
1813 local_hex_string ((unsigned long)addr));
1816 /* The object's sections are initialized when a
1817 call is made to build_objfile_section_table (objfile).
1818 This happens in reread_symbols.
1819 At this point, we don't know what file type this is,
1820 so we can't determine what section names are valid. */
1823 if (from_tty && (!query ("%s", "")))
1824 error ("Not confirmed.");
1826 symbol_file_add (filename, from_tty, §ion_addrs, 0, flags);
1828 /* Getting new symbols may change our opinion about what is
1830 reinit_frame_cache ();
1831 do_cleanups (my_cleanups);
1835 add_shared_symbol_files_command (char *args, int from_tty)
1837 #ifdef ADD_SHARED_SYMBOL_FILES
1838 ADD_SHARED_SYMBOL_FILES (args, from_tty);
1840 error ("This command is not available in this configuration of GDB.");
1844 /* Re-read symbols if a symbol-file has changed. */
1846 reread_symbols (void)
1848 struct objfile *objfile;
1851 struct stat new_statbuf;
1854 /* With the addition of shared libraries, this should be modified,
1855 the load time should be saved in the partial symbol tables, since
1856 different tables may come from different source files. FIXME.
1857 This routine should then walk down each partial symbol table
1858 and see if the symbol table that it originates from has been changed */
1860 for (objfile = object_files; objfile; objfile = objfile->next)
1864 #ifdef IBM6000_TARGET
1865 /* If this object is from a shared library, then you should
1866 stat on the library name, not member name. */
1868 if (objfile->obfd->my_archive)
1869 res = stat (objfile->obfd->my_archive->filename, &new_statbuf);
1872 res = stat (objfile->name, &new_statbuf);
1875 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1876 printf_filtered ("`%s' has disappeared; keeping its symbols.\n",
1880 new_modtime = new_statbuf.st_mtime;
1881 if (new_modtime != objfile->mtime)
1883 struct cleanup *old_cleanups;
1884 struct section_offsets *offsets;
1886 char *obfd_filename;
1888 printf_filtered ("`%s' has changed; re-reading symbols.\n",
1891 /* There are various functions like symbol_file_add,
1892 symfile_bfd_open, syms_from_objfile, etc., which might
1893 appear to do what we want. But they have various other
1894 effects which we *don't* want. So we just do stuff
1895 ourselves. We don't worry about mapped files (for one thing,
1896 any mapped file will be out of date). */
1898 /* If we get an error, blow away this objfile (not sure if
1899 that is the correct response for things like shared
1901 old_cleanups = make_cleanup_free_objfile (objfile);
1902 /* We need to do this whenever any symbols go away. */
1903 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
1905 /* Clean up any state BFD has sitting around. We don't need
1906 to close the descriptor but BFD lacks a way of closing the
1907 BFD without closing the descriptor. */
1908 obfd_filename = bfd_get_filename (objfile->obfd);
1909 if (!bfd_close (objfile->obfd))
1910 error ("Can't close BFD for %s: %s", objfile->name,
1911 bfd_errmsg (bfd_get_error ()));
1912 objfile->obfd = bfd_openr (obfd_filename, gnutarget);
1913 if (objfile->obfd == NULL)
1914 error ("Can't open %s to read symbols.", objfile->name);
1915 /* bfd_openr sets cacheable to true, which is what we want. */
1916 if (!bfd_check_format (objfile->obfd, bfd_object))
1917 error ("Can't read symbols from %s: %s.", objfile->name,
1918 bfd_errmsg (bfd_get_error ()));
1920 /* Save the offsets, we will nuke them with the rest of the
1922 num_offsets = objfile->num_sections;
1923 offsets = (struct section_offsets *) alloca (SIZEOF_SECTION_OFFSETS);
1924 memcpy (offsets, objfile->section_offsets, SIZEOF_SECTION_OFFSETS);
1926 /* Nuke all the state that we will re-read. Much of the following
1927 code which sets things to NULL really is necessary to tell
1928 other parts of GDB that there is nothing currently there. */
1930 /* FIXME: Do we have to free a whole linked list, or is this
1932 if (objfile->global_psymbols.list)
1933 xmfree (objfile->md, objfile->global_psymbols.list);
1934 memset (&objfile->global_psymbols, 0,
1935 sizeof (objfile->global_psymbols));
1936 if (objfile->static_psymbols.list)
1937 xmfree (objfile->md, objfile->static_psymbols.list);
1938 memset (&objfile->static_psymbols, 0,
1939 sizeof (objfile->static_psymbols));
1941 /* Free the obstacks for non-reusable objfiles */
1942 bcache_xfree (objfile->psymbol_cache);
1943 objfile->psymbol_cache = bcache_xmalloc ();
1944 bcache_xfree (objfile->macro_cache);
1945 objfile->macro_cache = bcache_xmalloc ();
1946 if (objfile->demangled_names_hash != NULL)
1948 htab_delete (objfile->demangled_names_hash);
1949 objfile->demangled_names_hash = NULL;
1951 obstack_free (&objfile->psymbol_obstack, 0);
1952 obstack_free (&objfile->symbol_obstack, 0);
1953 obstack_free (&objfile->type_obstack, 0);
1954 objfile->sections = NULL;
1955 objfile->symtabs = NULL;
1956 objfile->psymtabs = NULL;
1957 objfile->free_psymtabs = NULL;
1958 objfile->msymbols = NULL;
1959 objfile->minimal_symbol_count = 0;
1960 memset (&objfile->msymbol_hash, 0,
1961 sizeof (objfile->msymbol_hash));
1962 memset (&objfile->msymbol_demangled_hash, 0,
1963 sizeof (objfile->msymbol_demangled_hash));
1964 objfile->fundamental_types = NULL;
1965 if (objfile->sf != NULL)
1967 (*objfile->sf->sym_finish) (objfile);
1970 /* We never make this a mapped file. */
1972 /* obstack_specify_allocation also initializes the obstack so
1974 objfile->psymbol_cache = bcache_xmalloc ();
1975 objfile->macro_cache = bcache_xmalloc ();
1976 obstack_specify_allocation (&objfile->psymbol_obstack, 0, 0,
1978 obstack_specify_allocation (&objfile->symbol_obstack, 0, 0,
1980 obstack_specify_allocation (&objfile->type_obstack, 0, 0,
1982 if (build_objfile_section_table (objfile))
1984 error ("Can't find the file sections in `%s': %s",
1985 objfile->name, bfd_errmsg (bfd_get_error ()));
1987 terminate_minimal_symbol_table (objfile);
1989 /* We use the same section offsets as from last time. I'm not
1990 sure whether that is always correct for shared libraries. */
1991 objfile->section_offsets = (struct section_offsets *)
1992 obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS);
1993 memcpy (objfile->section_offsets, offsets, SIZEOF_SECTION_OFFSETS);
1994 objfile->num_sections = num_offsets;
1996 /* What the hell is sym_new_init for, anyway? The concept of
1997 distinguishing between the main file and additional files
1998 in this way seems rather dubious. */
1999 if (objfile == symfile_objfile)
2001 (*objfile->sf->sym_new_init) (objfile);
2003 RESET_HP_UX_GLOBALS ();
2007 (*objfile->sf->sym_init) (objfile);
2008 clear_complaints (&symfile_complaints, 1, 1);
2009 /* The "mainline" parameter is a hideous hack; I think leaving it
2010 zero is OK since dbxread.c also does what it needs to do if
2011 objfile->global_psymbols.size is 0. */
2012 (*objfile->sf->sym_read) (objfile, 0);
2013 if (!have_partial_symbols () && !have_full_symbols ())
2016 printf_filtered ("(no debugging symbols found)\n");
2019 objfile->flags |= OBJF_SYMS;
2021 /* We're done reading the symbol file; finish off complaints. */
2022 clear_complaints (&symfile_complaints, 0, 1);
2024 /* Getting new symbols may change our opinion about what is
2027 reinit_frame_cache ();
2029 /* Discard cleanups as symbol reading was successful. */
2030 discard_cleanups (old_cleanups);
2032 /* If the mtime has changed between the time we set new_modtime
2033 and now, we *want* this to be out of date, so don't call stat
2035 objfile->mtime = new_modtime;
2037 reread_separate_symbols (objfile);
2043 clear_symtab_users ();
2047 /* Handle separate debug info for OBJFILE, which has just been
2049 - If we had separate debug info before, but now we don't, get rid
2050 of the separated objfile.
2051 - If we didn't have separated debug info before, but now we do,
2052 read in the new separated debug info file.
2053 - If the debug link points to a different file, toss the old one
2054 and read the new one.
2055 This function does *not* handle the case where objfile is still
2056 using the same separate debug info file, but that file's timestamp
2057 has changed. That case should be handled by the loop in
2058 reread_symbols already. */
2060 reread_separate_symbols (struct objfile *objfile)
2063 unsigned long crc32;
2065 /* Does the updated objfile's debug info live in a
2067 debug_file = find_separate_debug_file (objfile);
2069 if (objfile->separate_debug_objfile)
2071 /* There are two cases where we need to get rid of
2072 the old separated debug info objfile:
2073 - if the new primary objfile doesn't have
2074 separated debug info, or
2075 - if the new primary objfile has separate debug
2076 info, but it's under a different filename.
2078 If the old and new objfiles both have separate
2079 debug info, under the same filename, then we're
2080 okay --- if the separated file's contents have
2081 changed, we will have caught that when we
2082 visited it in this function's outermost
2085 || strcmp (debug_file, objfile->separate_debug_objfile->name) != 0)
2086 free_objfile (objfile->separate_debug_objfile);
2089 /* If the new objfile has separate debug info, and we
2090 haven't loaded it already, do so now. */
2092 && ! objfile->separate_debug_objfile)
2094 /* Use the same section offset table as objfile itself.
2095 Preserve the flags from objfile that make sense. */
2096 objfile->separate_debug_objfile
2097 = (symbol_file_add_with_addrs_or_offsets
2099 info_verbose, /* from_tty: Don't override the default. */
2100 0, /* No addr table. */
2101 objfile->section_offsets, objfile->num_sections,
2102 0, /* Not mainline. See comments about this above. */
2103 objfile->flags & (OBJF_MAPPED | OBJF_REORDERED
2104 | OBJF_SHARED | OBJF_READNOW
2105 | OBJF_USERLOADED)));
2106 objfile->separate_debug_objfile->separate_debug_objfile_backlink
2122 static filename_language *filename_language_table;
2123 static int fl_table_size, fl_table_next;
2126 add_filename_language (char *ext, enum language lang)
2128 if (fl_table_next >= fl_table_size)
2130 fl_table_size += 10;
2131 filename_language_table =
2132 xrealloc (filename_language_table,
2133 fl_table_size * sizeof (*filename_language_table));
2136 filename_language_table[fl_table_next].ext = xstrdup (ext);
2137 filename_language_table[fl_table_next].lang = lang;
2141 static char *ext_args;
2144 set_ext_lang_command (char *args, int from_tty)
2147 char *cp = ext_args;
2150 /* First arg is filename extension, starting with '.' */
2152 error ("'%s': Filename extension must begin with '.'", ext_args);
2154 /* Find end of first arg. */
2155 while (*cp && !isspace (*cp))
2159 error ("'%s': two arguments required -- filename extension and language",
2162 /* Null-terminate first arg */
2165 /* Find beginning of second arg, which should be a source language. */
2166 while (*cp && isspace (*cp))
2170 error ("'%s': two arguments required -- filename extension and language",
2173 /* Lookup the language from among those we know. */
2174 lang = language_enum (cp);
2176 /* Now lookup the filename extension: do we already know it? */
2177 for (i = 0; i < fl_table_next; i++)
2178 if (0 == strcmp (ext_args, filename_language_table[i].ext))
2181 if (i >= fl_table_next)
2183 /* new file extension */
2184 add_filename_language (ext_args, lang);
2188 /* redefining a previously known filename extension */
2191 /* query ("Really make files of type %s '%s'?", */
2192 /* ext_args, language_str (lang)); */
2194 xfree (filename_language_table[i].ext);
2195 filename_language_table[i].ext = xstrdup (ext_args);
2196 filename_language_table[i].lang = lang;
2201 info_ext_lang_command (char *args, int from_tty)
2205 printf_filtered ("Filename extensions and the languages they represent:");
2206 printf_filtered ("\n\n");
2207 for (i = 0; i < fl_table_next; i++)
2208 printf_filtered ("\t%s\t- %s\n",
2209 filename_language_table[i].ext,
2210 language_str (filename_language_table[i].lang));
2214 init_filename_language_table (void)
2216 if (fl_table_size == 0) /* protect against repetition */
2220 filename_language_table =
2221 xmalloc (fl_table_size * sizeof (*filename_language_table));
2222 add_filename_language (".c", language_c);
2223 add_filename_language (".C", language_cplus);
2224 add_filename_language (".cc", language_cplus);
2225 add_filename_language (".cp", language_cplus);
2226 add_filename_language (".cpp", language_cplus);
2227 add_filename_language (".cxx", language_cplus);
2228 add_filename_language (".c++", language_cplus);
2229 add_filename_language (".java", language_java);
2230 add_filename_language (".class", language_java);
2231 add_filename_language (".m", language_objc);
2232 add_filename_language (".f", language_fortran);
2233 add_filename_language (".F", language_fortran);
2234 add_filename_language (".s", language_asm);
2235 add_filename_language (".S", language_asm);
2236 add_filename_language (".pas", language_pascal);
2237 add_filename_language (".p", language_pascal);
2238 add_filename_language (".pp", language_pascal);
2243 deduce_language_from_filename (char *filename)
2248 if (filename != NULL)
2249 if ((cp = strrchr (filename, '.')) != NULL)
2250 for (i = 0; i < fl_table_next; i++)
2251 if (strcmp (cp, filename_language_table[i].ext) == 0)
2252 return filename_language_table[i].lang;
2254 return language_unknown;
2259 Allocate and partly initialize a new symbol table. Return a pointer
2260 to it. error() if no space.
2262 Caller must set these fields:
2268 possibly free_named_symtabs (symtab->filename);
2272 allocate_symtab (char *filename, struct objfile *objfile)
2274 register struct symtab *symtab;
2276 symtab = (struct symtab *)
2277 obstack_alloc (&objfile->symbol_obstack, sizeof (struct symtab));
2278 memset (symtab, 0, sizeof (*symtab));
2279 symtab->filename = obsavestring (filename, strlen (filename),
2280 &objfile->symbol_obstack);
2281 symtab->fullname = NULL;
2282 symtab->language = deduce_language_from_filename (filename);
2283 symtab->debugformat = obsavestring ("unknown", 7,
2284 &objfile->symbol_obstack);
2286 /* Hook it to the objfile it comes from */
2288 symtab->objfile = objfile;
2289 symtab->next = objfile->symtabs;
2290 objfile->symtabs = symtab;
2292 /* FIXME: This should go away. It is only defined for the Z8000,
2293 and the Z8000 definition of this macro doesn't have anything to
2294 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
2295 here for convenience. */
2296 #ifdef INIT_EXTRA_SYMTAB_INFO
2297 INIT_EXTRA_SYMTAB_INFO (symtab);
2303 struct partial_symtab *
2304 allocate_psymtab (char *filename, struct objfile *objfile)
2306 struct partial_symtab *psymtab;
2308 if (objfile->free_psymtabs)
2310 psymtab = objfile->free_psymtabs;
2311 objfile->free_psymtabs = psymtab->next;
2314 psymtab = (struct partial_symtab *)
2315 obstack_alloc (&objfile->psymbol_obstack,
2316 sizeof (struct partial_symtab));
2318 memset (psymtab, 0, sizeof (struct partial_symtab));
2319 psymtab->filename = obsavestring (filename, strlen (filename),
2320 &objfile->psymbol_obstack);
2321 psymtab->symtab = NULL;
2323 /* Prepend it to the psymtab list for the objfile it belongs to.
2324 Psymtabs are searched in most recent inserted -> least recent
2327 psymtab->objfile = objfile;
2328 psymtab->next = objfile->psymtabs;
2329 objfile->psymtabs = psymtab;
2332 struct partial_symtab **prev_pst;
2333 psymtab->objfile = objfile;
2334 psymtab->next = NULL;
2335 prev_pst = &(objfile->psymtabs);
2336 while ((*prev_pst) != NULL)
2337 prev_pst = &((*prev_pst)->next);
2338 (*prev_pst) = psymtab;
2346 discard_psymtab (struct partial_symtab *pst)
2348 struct partial_symtab **prev_pst;
2351 Empty psymtabs happen as a result of header files which don't
2352 have any symbols in them. There can be a lot of them. But this
2353 check is wrong, in that a psymtab with N_SLINE entries but
2354 nothing else is not empty, but we don't realize that. Fixing
2355 that without slowing things down might be tricky. */
2357 /* First, snip it out of the psymtab chain */
2359 prev_pst = &(pst->objfile->psymtabs);
2360 while ((*prev_pst) != pst)
2361 prev_pst = &((*prev_pst)->next);
2362 (*prev_pst) = pst->next;
2364 /* Next, put it on a free list for recycling */
2366 pst->next = pst->objfile->free_psymtabs;
2367 pst->objfile->free_psymtabs = pst;
2371 /* Reset all data structures in gdb which may contain references to symbol
2375 clear_symtab_users (void)
2377 /* Someday, we should do better than this, by only blowing away
2378 the things that really need to be blown. */
2379 clear_value_history ();
2381 clear_internalvars ();
2382 breakpoint_re_set ();
2383 set_default_breakpoint (0, 0, 0, 0);
2384 clear_current_source_symtab_and_line ();
2385 clear_pc_function_cache ();
2386 if (target_new_objfile_hook)
2387 target_new_objfile_hook (NULL);
2391 clear_symtab_users_cleanup (void *ignore)
2393 clear_symtab_users ();
2396 /* clear_symtab_users_once:
2398 This function is run after symbol reading, or from a cleanup.
2399 If an old symbol table was obsoleted, the old symbol table
2400 has been blown away, but the other GDB data structures that may
2401 reference it have not yet been cleared or re-directed. (The old
2402 symtab was zapped, and the cleanup queued, in free_named_symtab()
2405 This function can be queued N times as a cleanup, or called
2406 directly; it will do all the work the first time, and then will be a
2407 no-op until the next time it is queued. This works by bumping a
2408 counter at queueing time. Much later when the cleanup is run, or at
2409 the end of symbol processing (in case the cleanup is discarded), if
2410 the queued count is greater than the "done-count", we do the work
2411 and set the done-count to the queued count. If the queued count is
2412 less than or equal to the done-count, we just ignore the call. This
2413 is needed because reading a single .o file will often replace many
2414 symtabs (one per .h file, for example), and we don't want to reset
2415 the breakpoints N times in the user's face.
2417 The reason we both queue a cleanup, and call it directly after symbol
2418 reading, is because the cleanup protects us in case of errors, but is
2419 discarded if symbol reading is successful. */
2422 /* FIXME: As free_named_symtabs is currently a big noop this function
2423 is no longer needed. */
2424 static void clear_symtab_users_once (void);
2426 static int clear_symtab_users_queued;
2427 static int clear_symtab_users_done;
2430 clear_symtab_users_once (void)
2432 /* Enforce once-per-`do_cleanups'-semantics */
2433 if (clear_symtab_users_queued <= clear_symtab_users_done)
2435 clear_symtab_users_done = clear_symtab_users_queued;
2437 clear_symtab_users ();
2441 /* Delete the specified psymtab, and any others that reference it. */
2444 cashier_psymtab (struct partial_symtab *pst)
2446 struct partial_symtab *ps, *pprev = NULL;
2449 /* Find its previous psymtab in the chain */
2450 for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
2459 /* Unhook it from the chain. */
2460 if (ps == pst->objfile->psymtabs)
2461 pst->objfile->psymtabs = ps->next;
2463 pprev->next = ps->next;
2465 /* FIXME, we can't conveniently deallocate the entries in the
2466 partial_symbol lists (global_psymbols/static_psymbols) that
2467 this psymtab points to. These just take up space until all
2468 the psymtabs are reclaimed. Ditto the dependencies list and
2469 filename, which are all in the psymbol_obstack. */
2471 /* We need to cashier any psymtab that has this one as a dependency... */
2473 for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
2475 for (i = 0; i < ps->number_of_dependencies; i++)
2477 if (ps->dependencies[i] == pst)
2479 cashier_psymtab (ps);
2480 goto again; /* Must restart, chain has been munged. */
2487 /* If a symtab or psymtab for filename NAME is found, free it along
2488 with any dependent breakpoints, displays, etc.
2489 Used when loading new versions of object modules with the "add-file"
2490 command. This is only called on the top-level symtab or psymtab's name;
2491 it is not called for subsidiary files such as .h files.
2493 Return value is 1 if we blew away the environment, 0 if not.
2494 FIXME. The return value appears to never be used.
2496 FIXME. I think this is not the best way to do this. We should
2497 work on being gentler to the environment while still cleaning up
2498 all stray pointers into the freed symtab. */
2501 free_named_symtabs (char *name)
2504 /* FIXME: With the new method of each objfile having it's own
2505 psymtab list, this function needs serious rethinking. In particular,
2506 why was it ever necessary to toss psymtabs with specific compilation
2507 unit filenames, as opposed to all psymtabs from a particular symbol
2509 Well, the answer is that some systems permit reloading of particular
2510 compilation units. We want to blow away any old info about these
2511 compilation units, regardless of which objfiles they arrived in. --gnu. */
2513 register struct symtab *s;
2514 register struct symtab *prev;
2515 register struct partial_symtab *ps;
2516 struct blockvector *bv;
2519 /* We only wack things if the symbol-reload switch is set. */
2520 if (!symbol_reloading)
2523 /* Some symbol formats have trouble providing file names... */
2524 if (name == 0 || *name == '\0')
2527 /* Look for a psymtab with the specified name. */
2530 for (ps = partial_symtab_list; ps; ps = ps->next)
2532 if (STREQ (name, ps->filename))
2534 cashier_psymtab (ps); /* Blow it away...and its little dog, too. */
2535 goto again2; /* Must restart, chain has been munged */
2539 /* Look for a symtab with the specified name. */
2541 for (s = symtab_list; s; s = s->next)
2543 if (STREQ (name, s->filename))
2550 if (s == symtab_list)
2551 symtab_list = s->next;
2553 prev->next = s->next;
2555 /* For now, queue a delete for all breakpoints, displays, etc., whether
2556 or not they depend on the symtab being freed. This should be
2557 changed so that only those data structures affected are deleted. */
2559 /* But don't delete anything if the symtab is empty.
2560 This test is necessary due to a bug in "dbxread.c" that
2561 causes empty symtabs to be created for N_SO symbols that
2562 contain the pathname of the object file. (This problem
2563 has been fixed in GDB 3.9x). */
2565 bv = BLOCKVECTOR (s);
2566 if (BLOCKVECTOR_NBLOCKS (bv) > 2
2567 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK))
2568 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)))
2570 complaint (&symfile_complaints, "Replacing old symbols for `%s'",
2572 clear_symtab_users_queued++;
2573 make_cleanup (clear_symtab_users_once, 0);
2578 complaint (&symfile_complaints, "Empty symbol table found for `%s'",
2586 /* It is still possible that some breakpoints will be affected
2587 even though no symtab was found, since the file might have
2588 been compiled without debugging, and hence not be associated
2589 with a symtab. In order to handle this correctly, we would need
2590 to keep a list of text address ranges for undebuggable files.
2591 For now, we do nothing, since this is a fairly obscure case. */
2595 /* FIXME, what about the minimal symbol table? */
2602 /* Allocate and partially fill a partial symtab. It will be
2603 completely filled at the end of the symbol list.
2605 FILENAME is the name of the symbol-file we are reading from. */
2607 struct partial_symtab *
2608 start_psymtab_common (struct objfile *objfile,
2609 struct section_offsets *section_offsets, char *filename,
2610 CORE_ADDR textlow, struct partial_symbol **global_syms,
2611 struct partial_symbol **static_syms)
2613 struct partial_symtab *psymtab;
2615 psymtab = allocate_psymtab (filename, objfile);
2616 psymtab->section_offsets = section_offsets;
2617 psymtab->textlow = textlow;
2618 psymtab->texthigh = psymtab->textlow; /* default */
2619 psymtab->globals_offset = global_syms - objfile->global_psymbols.list;
2620 psymtab->statics_offset = static_syms - objfile->static_psymbols.list;
2624 /* Add a symbol with a long value to a psymtab.
2625 Since one arg is a struct, we pass in a ptr and deref it (sigh). */
2628 add_psymbol_to_list (char *name, int namelength, domain_enum domain,
2629 enum address_class class,
2630 struct psymbol_allocation_list *list, long val, /* Value as a long */
2631 CORE_ADDR coreaddr, /* Value as a CORE_ADDR */
2632 enum language language, struct objfile *objfile)
2634 register struct partial_symbol *psym;
2635 char *buf = alloca (namelength + 1);
2636 /* psymbol is static so that there will be no uninitialized gaps in the
2637 structure which might contain random data, causing cache misses in
2639 static struct partial_symbol psymbol;
2641 /* Create local copy of the partial symbol */
2642 memcpy (buf, name, namelength);
2643 buf[namelength] = '\0';
2644 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2647 SYMBOL_VALUE (&psymbol) = val;
2651 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
2653 SYMBOL_SECTION (&psymbol) = 0;
2654 SYMBOL_LANGUAGE (&psymbol) = language;
2655 PSYMBOL_DOMAIN (&psymbol) = domain;
2656 PSYMBOL_CLASS (&psymbol) = class;
2658 SYMBOL_SET_NAMES (&psymbol, buf, namelength, objfile);
2660 /* Stash the partial symbol away in the cache */
2661 psym = bcache (&psymbol, sizeof (struct partial_symbol), objfile->psymbol_cache);
2663 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2664 if (list->next >= list->list + list->size)
2666 extend_psymbol_list (list, objfile);
2668 *list->next++ = psym;
2669 OBJSTAT (objfile, n_psyms++);
2672 /* Add a symbol with a long value to a psymtab. This differs from
2673 * add_psymbol_to_list above in taking both a mangled and a demangled
2677 add_psymbol_with_dem_name_to_list (char *name, int namelength, char *dem_name,
2678 int dem_namelength, domain_enum domain,
2679 enum address_class class,
2680 struct psymbol_allocation_list *list, long val, /* Value as a long */
2681 CORE_ADDR coreaddr, /* Value as a CORE_ADDR */
2682 enum language language,
2683 struct objfile *objfile)
2685 register struct partial_symbol *psym;
2686 char *buf = alloca (namelength + 1);
2687 /* psymbol is static so that there will be no uninitialized gaps in the
2688 structure which might contain random data, causing cache misses in
2690 static struct partial_symbol psymbol;
2692 /* Create local copy of the partial symbol */
2694 memcpy (buf, name, namelength);
2695 buf[namelength] = '\0';
2696 DEPRECATED_SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, objfile->psymbol_cache);
2698 buf = alloca (dem_namelength + 1);
2699 memcpy (buf, dem_name, dem_namelength);
2700 buf[dem_namelength] = '\0';
2705 case language_cplus:
2706 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol) =
2707 bcache (buf, dem_namelength + 1, objfile->psymbol_cache);
2709 /* FIXME What should be done for the default case? Ignoring for now. */
2712 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2715 SYMBOL_VALUE (&psymbol) = val;
2719 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
2721 SYMBOL_SECTION (&psymbol) = 0;
2722 SYMBOL_LANGUAGE (&psymbol) = language;
2723 PSYMBOL_DOMAIN (&psymbol) = domain;
2724 PSYMBOL_CLASS (&psymbol) = class;
2725 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language);
2727 /* Stash the partial symbol away in the cache */
2728 psym = bcache (&psymbol, sizeof (struct partial_symbol), objfile->psymbol_cache);
2730 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2731 if (list->next >= list->list + list->size)
2733 extend_psymbol_list (list, objfile);
2735 *list->next++ = psym;
2736 OBJSTAT (objfile, n_psyms++);
2739 /* Initialize storage for partial symbols. */
2742 init_psymbol_list (struct objfile *objfile, int total_symbols)
2744 /* Free any previously allocated psymbol lists. */
2746 if (objfile->global_psymbols.list)
2748 xmfree (objfile->md, objfile->global_psymbols.list);
2750 if (objfile->static_psymbols.list)
2752 xmfree (objfile->md, objfile->static_psymbols.list);
2755 /* Current best guess is that approximately a twentieth
2756 of the total symbols (in a debugging file) are global or static
2759 objfile->global_psymbols.size = total_symbols / 10;
2760 objfile->static_psymbols.size = total_symbols / 10;
2762 if (objfile->global_psymbols.size > 0)
2764 objfile->global_psymbols.next =
2765 objfile->global_psymbols.list = (struct partial_symbol **)
2766 xmmalloc (objfile->md, (objfile->global_psymbols.size
2767 * sizeof (struct partial_symbol *)));
2769 if (objfile->static_psymbols.size > 0)
2771 objfile->static_psymbols.next =
2772 objfile->static_psymbols.list = (struct partial_symbol **)
2773 xmmalloc (objfile->md, (objfile->static_psymbols.size
2774 * sizeof (struct partial_symbol *)));
2779 The following code implements an abstraction for debugging overlay sections.
2781 The target model is as follows:
2782 1) The gnu linker will permit multiple sections to be mapped into the
2783 same VMA, each with its own unique LMA (or load address).
2784 2) It is assumed that some runtime mechanism exists for mapping the
2785 sections, one by one, from the load address into the VMA address.
2786 3) This code provides a mechanism for gdb to keep track of which
2787 sections should be considered to be mapped from the VMA to the LMA.
2788 This information is used for symbol lookup, and memory read/write.
2789 For instance, if a section has been mapped then its contents
2790 should be read from the VMA, otherwise from the LMA.
2792 Two levels of debugger support for overlays are available. One is
2793 "manual", in which the debugger relies on the user to tell it which
2794 overlays are currently mapped. This level of support is
2795 implemented entirely in the core debugger, and the information about
2796 whether a section is mapped is kept in the objfile->obj_section table.
2798 The second level of support is "automatic", and is only available if
2799 the target-specific code provides functionality to read the target's
2800 overlay mapping table, and translate its contents for the debugger
2801 (by updating the mapped state information in the obj_section tables).
2803 The interface is as follows:
2805 overlay map <name> -- tell gdb to consider this section mapped
2806 overlay unmap <name> -- tell gdb to consider this section unmapped
2807 overlay list -- list the sections that GDB thinks are mapped
2808 overlay read-target -- get the target's state of what's mapped
2809 overlay off/manual/auto -- set overlay debugging state
2810 Functional interface:
2811 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2812 section, return that section.
2813 find_pc_overlay(pc): find any overlay section that contains
2814 the pc, either in its VMA or its LMA
2815 overlay_is_mapped(sect): true if overlay is marked as mapped
2816 section_is_overlay(sect): true if section's VMA != LMA
2817 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2818 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2819 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2820 overlay_mapped_address(...): map an address from section's LMA to VMA
2821 overlay_unmapped_address(...): map an address from section's VMA to LMA
2822 symbol_overlayed_address(...): Return a "current" address for symbol:
2823 either in VMA or LMA depending on whether
2824 the symbol's section is currently mapped
2827 /* Overlay debugging state: */
2829 enum overlay_debugging_state overlay_debugging = ovly_off;
2830 int overlay_cache_invalid = 0; /* True if need to refresh mapped state */
2832 /* Target vector for refreshing overlay mapped state */
2833 static void simple_overlay_update (struct obj_section *);
2834 void (*target_overlay_update) (struct obj_section *) = simple_overlay_update;
2836 /* Function: section_is_overlay (SECTION)
2837 Returns true if SECTION has VMA not equal to LMA, ie.
2838 SECTION is loaded at an address different from where it will "run". */
2841 section_is_overlay (asection *section)
2843 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2845 if (overlay_debugging)
2846 if (section && section->lma != 0 &&
2847 section->vma != section->lma)
2853 /* Function: overlay_invalidate_all (void)
2854 Invalidate the mapped state of all overlay sections (mark it as stale). */
2857 overlay_invalidate_all (void)
2859 struct objfile *objfile;
2860 struct obj_section *sect;
2862 ALL_OBJSECTIONS (objfile, sect)
2863 if (section_is_overlay (sect->the_bfd_section))
2864 sect->ovly_mapped = -1;
2867 /* Function: overlay_is_mapped (SECTION)
2868 Returns true if section is an overlay, and is currently mapped.
2869 Private: public access is thru function section_is_mapped.
2871 Access to the ovly_mapped flag is restricted to this function, so
2872 that we can do automatic update. If the global flag
2873 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2874 overlay_invalidate_all. If the mapped state of the particular
2875 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2878 overlay_is_mapped (struct obj_section *osect)
2880 if (osect == 0 || !section_is_overlay (osect->the_bfd_section))
2883 switch (overlay_debugging)
2887 return 0; /* overlay debugging off */
2888 case ovly_auto: /* overlay debugging automatic */
2889 /* Unles there is a target_overlay_update function,
2890 there's really nothing useful to do here (can't really go auto) */
2891 if (target_overlay_update)
2893 if (overlay_cache_invalid)
2895 overlay_invalidate_all ();
2896 overlay_cache_invalid = 0;
2898 if (osect->ovly_mapped == -1)
2899 (*target_overlay_update) (osect);
2901 /* fall thru to manual case */
2902 case ovly_on: /* overlay debugging manual */
2903 return osect->ovly_mapped == 1;
2907 /* Function: section_is_mapped
2908 Returns true if section is an overlay, and is currently mapped. */
2911 section_is_mapped (asection *section)
2913 struct objfile *objfile;
2914 struct obj_section *osect;
2916 if (overlay_debugging)
2917 if (section && section_is_overlay (section))
2918 ALL_OBJSECTIONS (objfile, osect)
2919 if (osect->the_bfd_section == section)
2920 return overlay_is_mapped (osect);
2925 /* Function: pc_in_unmapped_range
2926 If PC falls into the lma range of SECTION, return true, else false. */
2929 pc_in_unmapped_range (CORE_ADDR pc, asection *section)
2931 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2935 if (overlay_debugging)
2936 if (section && section_is_overlay (section))
2938 size = bfd_get_section_size_before_reloc (section);
2939 if (section->lma <= pc && pc < section->lma + size)
2945 /* Function: pc_in_mapped_range
2946 If PC falls into the vma range of SECTION, return true, else false. */
2949 pc_in_mapped_range (CORE_ADDR pc, asection *section)
2951 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2955 if (overlay_debugging)
2956 if (section && section_is_overlay (section))
2958 size = bfd_get_section_size_before_reloc (section);
2959 if (section->vma <= pc && pc < section->vma + size)
2966 /* Return true if the mapped ranges of sections A and B overlap, false
2969 sections_overlap (asection *a, asection *b)
2971 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2973 CORE_ADDR a_start = a->vma;
2974 CORE_ADDR a_end = a->vma + bfd_get_section_size_before_reloc (a);
2975 CORE_ADDR b_start = b->vma;
2976 CORE_ADDR b_end = b->vma + bfd_get_section_size_before_reloc (b);
2978 return (a_start < b_end && b_start < a_end);
2981 /* Function: overlay_unmapped_address (PC, SECTION)
2982 Returns the address corresponding to PC in the unmapped (load) range.
2983 May be the same as PC. */
2986 overlay_unmapped_address (CORE_ADDR pc, asection *section)
2988 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2990 if (overlay_debugging)
2991 if (section && section_is_overlay (section) &&
2992 pc_in_mapped_range (pc, section))
2993 return pc + section->lma - section->vma;
2998 /* Function: overlay_mapped_address (PC, SECTION)
2999 Returns the address corresponding to PC in the mapped (runtime) range.
3000 May be the same as PC. */
3003 overlay_mapped_address (CORE_ADDR pc, asection *section)
3005 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3007 if (overlay_debugging)
3008 if (section && section_is_overlay (section) &&
3009 pc_in_unmapped_range (pc, section))
3010 return pc + section->vma - section->lma;
3016 /* Function: symbol_overlayed_address
3017 Return one of two addresses (relative to the VMA or to the LMA),
3018 depending on whether the section is mapped or not. */
3021 symbol_overlayed_address (CORE_ADDR address, asection *section)
3023 if (overlay_debugging)
3025 /* If the symbol has no section, just return its regular address. */
3028 /* If the symbol's section is not an overlay, just return its address */
3029 if (!section_is_overlay (section))
3031 /* If the symbol's section is mapped, just return its address */
3032 if (section_is_mapped (section))
3035 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3036 * then return its LOADED address rather than its vma address!!
3038 return overlay_unmapped_address (address, section);
3043 /* Function: find_pc_overlay (PC)
3044 Return the best-match overlay section for PC:
3045 If PC matches a mapped overlay section's VMA, return that section.
3046 Else if PC matches an unmapped section's VMA, return that section.
3047 Else if PC matches an unmapped section's LMA, return that section. */
3050 find_pc_overlay (CORE_ADDR pc)
3052 struct objfile *objfile;
3053 struct obj_section *osect, *best_match = NULL;
3055 if (overlay_debugging)
3056 ALL_OBJSECTIONS (objfile, osect)
3057 if (section_is_overlay (osect->the_bfd_section))
3059 if (pc_in_mapped_range (pc, osect->the_bfd_section))
3061 if (overlay_is_mapped (osect))
3062 return osect->the_bfd_section;
3066 else if (pc_in_unmapped_range (pc, osect->the_bfd_section))
3069 return best_match ? best_match->the_bfd_section : NULL;
3072 /* Function: find_pc_mapped_section (PC)
3073 If PC falls into the VMA address range of an overlay section that is
3074 currently marked as MAPPED, return that section. Else return NULL. */
3077 find_pc_mapped_section (CORE_ADDR pc)
3079 struct objfile *objfile;
3080 struct obj_section *osect;
3082 if (overlay_debugging)
3083 ALL_OBJSECTIONS (objfile, osect)
3084 if (pc_in_mapped_range (pc, osect->the_bfd_section) &&
3085 overlay_is_mapped (osect))
3086 return osect->the_bfd_section;
3091 /* Function: list_overlays_command
3092 Print a list of mapped sections and their PC ranges */
3095 list_overlays_command (char *args, int from_tty)
3098 struct objfile *objfile;
3099 struct obj_section *osect;
3101 if (overlay_debugging)
3102 ALL_OBJSECTIONS (objfile, osect)
3103 if (overlay_is_mapped (osect))
3109 vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section);
3110 lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section);
3111 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
3112 name = bfd_section_name (objfile->obfd, osect->the_bfd_section);
3114 printf_filtered ("Section %s, loaded at ", name);
3115 print_address_numeric (lma, 1, gdb_stdout);
3116 puts_filtered (" - ");
3117 print_address_numeric (lma + size, 1, gdb_stdout);
3118 printf_filtered (", mapped at ");
3119 print_address_numeric (vma, 1, gdb_stdout);
3120 puts_filtered (" - ");
3121 print_address_numeric (vma + size, 1, gdb_stdout);
3122 puts_filtered ("\n");
3127 printf_filtered ("No sections are mapped.\n");
3130 /* Function: map_overlay_command
3131 Mark the named section as mapped (ie. residing at its VMA address). */
3134 map_overlay_command (char *args, int from_tty)
3136 struct objfile *objfile, *objfile2;
3137 struct obj_section *sec, *sec2;
3140 if (!overlay_debugging)
3142 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3143 the 'overlay manual' command.");
3145 if (args == 0 || *args == 0)
3146 error ("Argument required: name of an overlay section");
3148 /* First, find a section matching the user supplied argument */
3149 ALL_OBJSECTIONS (objfile, sec)
3150 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
3152 /* Now, check to see if the section is an overlay. */
3153 bfdsec = sec->the_bfd_section;
3154 if (!section_is_overlay (bfdsec))
3155 continue; /* not an overlay section */
3157 /* Mark the overlay as "mapped" */
3158 sec->ovly_mapped = 1;
3160 /* Next, make a pass and unmap any sections that are
3161 overlapped by this new section: */
3162 ALL_OBJSECTIONS (objfile2, sec2)
3163 if (sec2->ovly_mapped
3165 && sec->the_bfd_section != sec2->the_bfd_section
3166 && sections_overlap (sec->the_bfd_section,
3167 sec2->the_bfd_section))
3170 printf_filtered ("Note: section %s unmapped by overlap\n",
3171 bfd_section_name (objfile->obfd,
3172 sec2->the_bfd_section));
3173 sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2 */
3177 error ("No overlay section called %s", args);
3180 /* Function: unmap_overlay_command
3181 Mark the overlay section as unmapped
3182 (ie. resident in its LMA address range, rather than the VMA range). */
3185 unmap_overlay_command (char *args, int from_tty)
3187 struct objfile *objfile;
3188 struct obj_section *sec;
3190 if (!overlay_debugging)
3192 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3193 the 'overlay manual' command.");
3195 if (args == 0 || *args == 0)
3196 error ("Argument required: name of an overlay section");
3198 /* First, find a section matching the user supplied argument */
3199 ALL_OBJSECTIONS (objfile, sec)
3200 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
3202 if (!sec->ovly_mapped)
3203 error ("Section %s is not mapped", args);
3204 sec->ovly_mapped = 0;
3207 error ("No overlay section called %s", args);
3210 /* Function: overlay_auto_command
3211 A utility command to turn on overlay debugging.
3212 Possibly this should be done via a set/show command. */
3215 overlay_auto_command (char *args, int from_tty)
3217 overlay_debugging = ovly_auto;
3218 enable_overlay_breakpoints ();
3220 printf_filtered ("Automatic overlay debugging enabled.");
3223 /* Function: overlay_manual_command
3224 A utility command to turn on overlay debugging.
3225 Possibly this should be done via a set/show command. */
3228 overlay_manual_command (char *args, int from_tty)
3230 overlay_debugging = ovly_on;
3231 disable_overlay_breakpoints ();
3233 printf_filtered ("Overlay debugging enabled.");
3236 /* Function: overlay_off_command
3237 A utility command to turn on overlay debugging.
3238 Possibly this should be done via a set/show command. */
3241 overlay_off_command (char *args, int from_tty)
3243 overlay_debugging = ovly_off;
3244 disable_overlay_breakpoints ();
3246 printf_filtered ("Overlay debugging disabled.");
3250 overlay_load_command (char *args, int from_tty)
3252 if (target_overlay_update)
3253 (*target_overlay_update) (NULL);
3255 error ("This target does not know how to read its overlay state.");
3258 /* Function: overlay_command
3259 A place-holder for a mis-typed command */
3261 /* Command list chain containing all defined "overlay" subcommands. */
3262 struct cmd_list_element *overlaylist;
3265 overlay_command (char *args, int from_tty)
3268 ("\"overlay\" must be followed by the name of an overlay command.\n");
3269 help_list (overlaylist, "overlay ", -1, gdb_stdout);
3273 /* Target Overlays for the "Simplest" overlay manager:
3275 This is GDB's default target overlay layer. It works with the
3276 minimal overlay manager supplied as an example by Cygnus. The
3277 entry point is via a function pointer "target_overlay_update",
3278 so targets that use a different runtime overlay manager can
3279 substitute their own overlay_update function and take over the
3282 The overlay_update function pokes around in the target's data structures
3283 to see what overlays are mapped, and updates GDB's overlay mapping with
3286 In this simple implementation, the target data structures are as follows:
3287 unsigned _novlys; /# number of overlay sections #/
3288 unsigned _ovly_table[_novlys][4] = {
3289 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3290 {..., ..., ..., ...},
3292 unsigned _novly_regions; /# number of overlay regions #/
3293 unsigned _ovly_region_table[_novly_regions][3] = {
3294 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3297 These functions will attempt to update GDB's mappedness state in the
3298 symbol section table, based on the target's mappedness state.
3300 To do this, we keep a cached copy of the target's _ovly_table, and
3301 attempt to detect when the cached copy is invalidated. The main
3302 entry point is "simple_overlay_update(SECT), which looks up SECT in
3303 the cached table and re-reads only the entry for that section from
3304 the target (whenever possible).
3307 /* Cached, dynamically allocated copies of the target data structures: */
3308 static unsigned (*cache_ovly_table)[4] = 0;
3310 static unsigned (*cache_ovly_region_table)[3] = 0;
3312 static unsigned cache_novlys = 0;
3314 static unsigned cache_novly_regions = 0;
3316 static CORE_ADDR cache_ovly_table_base = 0;
3318 static CORE_ADDR cache_ovly_region_table_base = 0;
3322 VMA, SIZE, LMA, MAPPED
3324 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
3326 /* Throw away the cached copy of _ovly_table */
3328 simple_free_overlay_table (void)
3330 if (cache_ovly_table)
3331 xfree (cache_ovly_table);
3333 cache_ovly_table = NULL;
3334 cache_ovly_table_base = 0;
3338 /* Throw away the cached copy of _ovly_region_table */
3340 simple_free_overlay_region_table (void)
3342 if (cache_ovly_region_table)
3343 xfree (cache_ovly_region_table);
3344 cache_novly_regions = 0;
3345 cache_ovly_region_table = NULL;
3346 cache_ovly_region_table_base = 0;
3350 /* Read an array of ints from the target into a local buffer.
3351 Convert to host order. int LEN is number of ints */
3353 read_target_long_array (CORE_ADDR memaddr, unsigned int *myaddr, int len)
3355 /* FIXME (alloca): Not safe if array is very large. */
3356 char *buf = alloca (len * TARGET_LONG_BYTES);
3359 read_memory (memaddr, buf, len * TARGET_LONG_BYTES);
3360 for (i = 0; i < len; i++)
3361 myaddr[i] = extract_unsigned_integer (TARGET_LONG_BYTES * i + buf,
3365 /* Find and grab a copy of the target _ovly_table
3366 (and _novlys, which is needed for the table's size) */
3368 simple_read_overlay_table (void)
3370 struct minimal_symbol *novlys_msym, *ovly_table_msym;
3372 simple_free_overlay_table ();
3373 novlys_msym = lookup_minimal_symbol ("_novlys", NULL, NULL);
3376 error ("Error reading inferior's overlay table: "
3377 "couldn't find `_novlys' variable\n"
3378 "in inferior. Use `overlay manual' mode.");
3382 ovly_table_msym = lookup_minimal_symbol ("_ovly_table", NULL, NULL);
3383 if (! ovly_table_msym)
3385 error ("Error reading inferior's overlay table: couldn't find "
3386 "`_ovly_table' array\n"
3387 "in inferior. Use `overlay manual' mode.");
3391 cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym), 4);
3393 = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table));
3394 cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (ovly_table_msym);
3395 read_target_long_array (cache_ovly_table_base,
3396 (int *) cache_ovly_table,
3399 return 1; /* SUCCESS */
3403 /* Find and grab a copy of the target _ovly_region_table
3404 (and _novly_regions, which is needed for the table's size) */
3406 simple_read_overlay_region_table (void)
3408 struct minimal_symbol *msym;
3410 simple_free_overlay_region_table ();
3411 msym = lookup_minimal_symbol ("_novly_regions", NULL, NULL);
3413 cache_novly_regions = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4);
3415 return 0; /* failure */
3416 cache_ovly_region_table = (void *) xmalloc (cache_novly_regions * 12);
3417 if (cache_ovly_region_table != NULL)
3419 msym = lookup_minimal_symbol ("_ovly_region_table", NULL, NULL);
3422 cache_ovly_region_table_base = SYMBOL_VALUE_ADDRESS (msym);
3423 read_target_long_array (cache_ovly_region_table_base,
3424 (int *) cache_ovly_region_table,
3425 cache_novly_regions * 3);
3428 return 0; /* failure */
3431 return 0; /* failure */
3432 return 1; /* SUCCESS */
3436 /* Function: simple_overlay_update_1
3437 A helper function for simple_overlay_update. Assuming a cached copy
3438 of _ovly_table exists, look through it to find an entry whose vma,
3439 lma and size match those of OSECT. Re-read the entry and make sure
3440 it still matches OSECT (else the table may no longer be valid).
3441 Set OSECT's mapped state to match the entry. Return: 1 for
3442 success, 0 for failure. */
3445 simple_overlay_update_1 (struct obj_section *osect)
3448 bfd *obfd = osect->objfile->obfd;
3449 asection *bsect = osect->the_bfd_section;
3451 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
3452 for (i = 0; i < cache_novlys; i++)
3453 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3454 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3455 /* && cache_ovly_table[i][SIZE] == size */ )
3457 read_target_long_array (cache_ovly_table_base + i * TARGET_LONG_BYTES,
3458 (int *) cache_ovly_table[i], 4);
3459 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3460 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3461 /* && cache_ovly_table[i][SIZE] == size */ )
3463 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3466 else /* Warning! Warning! Target's ovly table has changed! */
3472 /* Function: simple_overlay_update
3473 If OSECT is NULL, then update all sections' mapped state
3474 (after re-reading the entire target _ovly_table).
3475 If OSECT is non-NULL, then try to find a matching entry in the
3476 cached ovly_table and update only OSECT's mapped state.
3477 If a cached entry can't be found or the cache isn't valid, then
3478 re-read the entire cache, and go ahead and update all sections. */
3481 simple_overlay_update (struct obj_section *osect)
3483 struct objfile *objfile;
3485 /* Were we given an osect to look up? NULL means do all of them. */
3487 /* Have we got a cached copy of the target's overlay table? */
3488 if (cache_ovly_table != NULL)
3489 /* Does its cached location match what's currently in the symtab? */
3490 if (cache_ovly_table_base ==
3491 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL, NULL)))
3492 /* Then go ahead and try to look up this single section in the cache */
3493 if (simple_overlay_update_1 (osect))
3494 /* Found it! We're done. */
3497 /* Cached table no good: need to read the entire table anew.
3498 Or else we want all the sections, in which case it's actually
3499 more efficient to read the whole table in one block anyway. */
3501 if (! simple_read_overlay_table ())
3504 /* Now may as well update all sections, even if only one was requested. */
3505 ALL_OBJSECTIONS (objfile, osect)
3506 if (section_is_overlay (osect->the_bfd_section))
3509 bfd *obfd = osect->objfile->obfd;
3510 asection *bsect = osect->the_bfd_section;
3512 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
3513 for (i = 0; i < cache_novlys; i++)
3514 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3515 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3516 /* && cache_ovly_table[i][SIZE] == size */ )
3517 { /* obj_section matches i'th entry in ovly_table */
3518 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3519 break; /* finished with inner for loop: break out */
3524 /* Set the output sections and output offsets for section SECTP in
3525 ABFD. The relocation code in BFD will read these offsets, so we
3526 need to be sure they're initialized. We map each section to itself,
3527 with no offset; this means that SECTP->vma will be honored. */
3530 symfile_dummy_outputs (bfd *abfd, asection *sectp, void *dummy)
3532 sectp->output_section = sectp;
3533 sectp->output_offset = 0;
3536 /* Relocate the contents of a debug section SECTP in ABFD. The
3537 contents are stored in BUF if it is non-NULL, or returned in a
3538 malloc'd buffer otherwise.
3540 For some platforms and debug info formats, shared libraries contain
3541 relocations against the debug sections (particularly for DWARF-2;
3542 one affected platform is PowerPC GNU/Linux, although it depends on
3543 the version of the linker in use). Also, ELF object files naturally
3544 have unresolved relocations for their debug sections. We need to apply
3545 the relocations in order to get the locations of symbols correct. */
3548 symfile_relocate_debug_section (bfd *abfd, asection *sectp, bfd_byte *buf)
3550 /* We're only interested in debugging sections with relocation
3552 if ((sectp->flags & SEC_RELOC) == 0)
3554 if ((sectp->flags & SEC_DEBUGGING) == 0)
3557 /* We will handle section offsets properly elsewhere, so relocate as if
3558 all sections begin at 0. */
3559 bfd_map_over_sections (abfd, symfile_dummy_outputs, NULL);
3561 return bfd_simple_get_relocated_section_contents (abfd, sectp, buf, NULL);
3565 _initialize_symfile (void)
3567 struct cmd_list_element *c;
3569 c = add_cmd ("symbol-file", class_files, symbol_file_command,
3570 "Load symbol table from executable file FILE.\n\
3571 The `file' command can also load symbol tables, as well as setting the file\n\
3572 to execute.", &cmdlist);
3573 set_cmd_completer (c, filename_completer);
3575 c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command,
3576 "Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3577 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3578 ADDR is the starting address of the file's text.\n\
3579 The optional arguments are section-name section-address pairs and\n\
3580 should be specified if the data and bss segments are not contiguous\n\
3581 with the text. SECT is a section name to be loaded at SECT_ADDR.",
3583 set_cmd_completer (c, filename_completer);
3585 c = add_cmd ("add-shared-symbol-files", class_files,
3586 add_shared_symbol_files_command,
3587 "Load the symbols from shared objects in the dynamic linker's link map.",
3589 c = add_alias_cmd ("assf", "add-shared-symbol-files", class_files, 1,
3592 c = add_cmd ("load", class_files, load_command,
3593 "Dynamically load FILE into the running program, and record its symbols\n\
3594 for access from GDB.", &cmdlist);
3595 set_cmd_completer (c, filename_completer);
3598 (add_set_cmd ("symbol-reloading", class_support, var_boolean,
3599 (char *) &symbol_reloading,
3600 "Set dynamic symbol table reloading multiple times in one run.",
3604 add_prefix_cmd ("overlay", class_support, overlay_command,
3605 "Commands for debugging overlays.", &overlaylist,
3606 "overlay ", 0, &cmdlist);
3608 add_com_alias ("ovly", "overlay", class_alias, 1);
3609 add_com_alias ("ov", "overlay", class_alias, 1);
3611 add_cmd ("map-overlay", class_support, map_overlay_command,
3612 "Assert that an overlay section is mapped.", &overlaylist);
3614 add_cmd ("unmap-overlay", class_support, unmap_overlay_command,
3615 "Assert that an overlay section is unmapped.", &overlaylist);
3617 add_cmd ("list-overlays", class_support, list_overlays_command,
3618 "List mappings of overlay sections.", &overlaylist);
3620 add_cmd ("manual", class_support, overlay_manual_command,
3621 "Enable overlay debugging.", &overlaylist);
3622 add_cmd ("off", class_support, overlay_off_command,
3623 "Disable overlay debugging.", &overlaylist);
3624 add_cmd ("auto", class_support, overlay_auto_command,
3625 "Enable automatic overlay debugging.", &overlaylist);
3626 add_cmd ("load-target", class_support, overlay_load_command,
3627 "Read the overlay mapping state from the target.", &overlaylist);
3629 /* Filename extension to source language lookup table: */
3630 init_filename_language_table ();
3631 c = add_set_cmd ("extension-language", class_files, var_string_noescape,
3633 "Set mapping between filename extension and source language.\n\
3634 Usage: set extension-language .foo bar",
3636 set_cmd_cfunc (c, set_ext_lang_command);
3638 add_info ("extensions", info_ext_lang_command,
3639 "All filename extensions associated with a source language.");
3642 (add_set_cmd ("download-write-size", class_obscure,
3643 var_integer, (char *) &download_write_size,
3644 "Set the write size used when downloading a program.\n"
3645 "Only used when downloading a program onto a remote\n"
3646 "target. Specify zero, or a negative value, to disable\n"
3647 "blocked writes. The actual size of each transfer is also\n"
3648 "limited by the size of the target packet and the memory\n"
3653 debug_file_directory = xstrdup (DEBUGDIR);
3655 ("debug-file-directory", class_support, var_string,
3656 (char *) &debug_file_directory,
3657 "Set the directory where separate debug symbols are searched for.\n"
3658 "Separate debug symbols are first searched for in the same\n"
3659 "directory as the binary, then in the `" DEBUG_SUBDIRECTORY
3661 "and lastly at the path of the directory of the binary with\n"
3662 "the global debug-file directory prepended\n",
3664 add_show_from_set (c, &showlist);
3665 set_cmd_completer (c, filename_completer);