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);
796 /* Call this after reading in a new symbol table to give target
797 dependent code a crack at the new symbols. For instance, this
798 could be used to update the values of target-specific symbols GDB
799 needs to keep track of (such as _sigtramp, or whatever). */
801 TARGET_SYMFILE_POSTREAD (objfile);
804 /* Perform required actions after either reading in the initial
805 symbols for a new objfile, or mapping in the symbols from a reusable
809 new_symfile_objfile (struct objfile *objfile, int mainline, int verbo)
812 /* If this is the main symbol file we have to clean up all users of the
813 old main symbol file. Otherwise it is sufficient to fixup all the
814 breakpoints that may have been redefined by this symbol file. */
817 /* OK, make it the "real" symbol file. */
818 symfile_objfile = objfile;
820 clear_symtab_users ();
824 breakpoint_re_set ();
827 /* We're done reading the symbol file; finish off complaints. */
828 clear_complaints (&symfile_complaints, 0, verbo);
831 /* Process a symbol file, as either the main file or as a dynamically
834 NAME is the file name (which will be tilde-expanded and made
835 absolute herein) (but we don't free or modify NAME itself).
837 FROM_TTY says how verbose to be.
839 MAINLINE specifies whether this is the main symbol file, or whether
840 it's an extra symbol file such as dynamically loaded code.
842 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
843 syms_from_objfile, above. ADDRS is ignored when MAINLINE is
846 Upon success, returns a pointer to the objfile that was added.
847 Upon failure, jumps back to command level (never returns). */
848 static struct objfile *
849 symbol_file_add_with_addrs_or_offsets (char *name, int from_tty,
850 struct section_addr_info *addrs,
851 struct section_offsets *offsets,
853 int mainline, int flags)
855 struct objfile *objfile;
856 struct partial_symtab *psymtab;
859 struct section_addr_info orig_addrs;
864 /* Open a bfd for the file, and give user a chance to burp if we'd be
865 interactively wiping out any existing symbols. */
867 abfd = symfile_bfd_open (name);
869 if ((have_full_symbols () || have_partial_symbols ())
872 && !query ("Load new symbol table from \"%s\"? ", name))
873 error ("Not confirmed.");
875 objfile = allocate_objfile (abfd, flags);
877 /* If the objfile uses a mapped symbol file, and we have a psymtab for
878 it, then skip reading any symbols at this time. */
880 if ((objfile->flags & OBJF_MAPPED) && (objfile->flags & OBJF_SYMS))
882 /* We mapped in an existing symbol table file that already has had
883 initial symbol reading performed, so we can skip that part. Notify
884 the user that instead of reading the symbols, they have been mapped.
886 if (from_tty || info_verbose)
888 printf_filtered ("Mapped symbols for %s...", name);
890 gdb_flush (gdb_stdout);
892 init_entry_point_info (objfile);
893 find_sym_fns (objfile);
897 /* We either created a new mapped symbol table, mapped an existing
898 symbol table file which has not had initial symbol reading
899 performed, or need to read an unmapped symbol table. */
900 if (from_tty || info_verbose)
902 if (pre_add_symbol_hook)
903 pre_add_symbol_hook (name);
906 printf_filtered ("Reading symbols from %s...", name);
908 gdb_flush (gdb_stdout);
911 syms_from_objfile (objfile, addrs, offsets, num_offsets,
915 /* We now have at least a partial symbol table. Check to see if the
916 user requested that all symbols be read on initial access via either
917 the gdb startup command line or on a per symbol file basis. Expand
918 all partial symbol tables for this objfile if so. */
920 if ((flags & OBJF_READNOW) || readnow_symbol_files)
922 if (from_tty || info_verbose)
924 printf_filtered ("expanding to full symbols...");
926 gdb_flush (gdb_stdout);
929 for (psymtab = objfile->psymtabs;
931 psymtab = psymtab->next)
933 psymtab_to_symtab (psymtab);
937 debugfile = find_separate_debug_file (objfile);
942 objfile->separate_debug_objfile
943 = symbol_file_add (debugfile, from_tty, &orig_addrs, 0, flags);
947 objfile->separate_debug_objfile
948 = symbol_file_add (debugfile, from_tty, NULL, 0, flags);
950 objfile->separate_debug_objfile->separate_debug_objfile_backlink
953 /* Put the separate debug object before the normal one, this is so that
954 usage of the ALL_OBJFILES_SAFE macro will stay safe. */
955 put_objfile_before (objfile->separate_debug_objfile, objfile);
960 if (!have_partial_symbols () && !have_full_symbols ())
963 printf_filtered ("(no debugging symbols found)...");
967 if (from_tty || info_verbose)
969 if (post_add_symbol_hook)
970 post_add_symbol_hook ();
973 printf_filtered ("done.\n");
977 /* We print some messages regardless of whether 'from_tty ||
978 info_verbose' is true, so make sure they go out at the right
980 gdb_flush (gdb_stdout);
982 if (objfile->sf == NULL)
983 return objfile; /* No symbols. */
985 new_symfile_objfile (objfile, mainline, from_tty);
987 if (target_new_objfile_hook)
988 target_new_objfile_hook (objfile);
994 /* Process a symbol file, as either the main file or as a dynamically
995 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
998 symbol_file_add (char *name, int from_tty, struct section_addr_info *addrs,
999 int mainline, int flags)
1001 return symbol_file_add_with_addrs_or_offsets (name, from_tty, addrs, 0, 0,
1006 /* Call symbol_file_add() with default values and update whatever is
1007 affected by the loading of a new main().
1008 Used when the file is supplied in the gdb command line
1009 and by some targets with special loading requirements.
1010 The auxiliary function, symbol_file_add_main_1(), has the flags
1011 argument for the switches that can only be specified in the symbol_file
1015 symbol_file_add_main (char *args, int from_tty)
1017 symbol_file_add_main_1 (args, from_tty, 0);
1021 symbol_file_add_main_1 (char *args, int from_tty, int flags)
1023 symbol_file_add (args, from_tty, NULL, 1, flags);
1026 RESET_HP_UX_GLOBALS ();
1029 /* Getting new symbols may change our opinion about
1030 what is frameless. */
1031 reinit_frame_cache ();
1033 set_initial_language ();
1037 symbol_file_clear (int from_tty)
1039 if ((have_full_symbols () || have_partial_symbols ())
1041 && !query ("Discard symbol table from `%s'? ",
1042 symfile_objfile->name))
1043 error ("Not confirmed.");
1044 free_all_objfiles ();
1046 /* solib descriptors may have handles to objfiles. Since their
1047 storage has just been released, we'd better wipe the solib
1048 descriptors as well.
1050 #if defined(SOLIB_RESTART)
1054 symfile_objfile = NULL;
1056 printf_unfiltered ("No symbol file now.\n");
1058 RESET_HP_UX_GLOBALS ();
1063 get_debug_link_info (struct objfile *objfile, unsigned long *crc32_out)
1066 bfd_size_type debuglink_size;
1067 unsigned long crc32;
1072 sect = bfd_get_section_by_name (objfile->obfd, ".gnu_debuglink");
1077 debuglink_size = bfd_section_size (objfile->obfd, sect);
1079 contents = xmalloc (debuglink_size);
1080 bfd_get_section_contents (objfile->obfd, sect, contents,
1081 (file_ptr)0, (bfd_size_type)debuglink_size);
1083 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1084 crc_offset = strlen (contents) + 1;
1085 crc_offset = (crc_offset + 3) & ~3;
1087 crc32 = bfd_get_32 (objfile->obfd, (bfd_byte *) (contents + crc_offset));
1094 separate_debug_file_exists (const char *name, unsigned long crc)
1096 unsigned long file_crc = 0;
1098 char buffer[8*1024];
1101 fd = open (name, O_RDONLY | O_BINARY);
1105 while ((count = read (fd, buffer, sizeof (buffer))) > 0)
1106 file_crc = gnu_debuglink_crc32 (file_crc, buffer, count);
1110 return crc == file_crc;
1113 static char *debug_file_directory = NULL;
1115 #if ! defined (DEBUG_SUBDIRECTORY)
1116 #define DEBUG_SUBDIRECTORY ".debug"
1120 find_separate_debug_file (struct objfile *objfile)
1127 bfd_size_type debuglink_size;
1128 unsigned long crc32;
1131 basename = get_debug_link_info (objfile, &crc32);
1133 if (basename == NULL)
1136 dir = xstrdup (objfile->name);
1138 /* Strip off the final filename part, leaving the directory name,
1139 followed by a slash. Objfile names should always be absolute and
1140 tilde-expanded, so there should always be a slash in there
1142 for (i = strlen(dir) - 1; i >= 0; i--)
1144 if (IS_DIR_SEPARATOR (dir[i]))
1147 gdb_assert (i >= 0 && IS_DIR_SEPARATOR (dir[i]));
1150 debugfile = alloca (strlen (debug_file_directory) + 1
1152 + strlen (DEBUG_SUBDIRECTORY)
1157 /* First try in the same directory as the original file. */
1158 strcpy (debugfile, dir);
1159 strcat (debugfile, basename);
1161 if (separate_debug_file_exists (debugfile, crc32))
1165 return xstrdup (debugfile);
1168 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1169 strcpy (debugfile, dir);
1170 strcat (debugfile, DEBUG_SUBDIRECTORY);
1171 strcat (debugfile, "/");
1172 strcat (debugfile, basename);
1174 if (separate_debug_file_exists (debugfile, crc32))
1178 return xstrdup (debugfile);
1181 /* Then try in the global debugfile directory. */
1182 strcpy (debugfile, debug_file_directory);
1183 strcat (debugfile, "/");
1184 strcat (debugfile, dir);
1185 strcat (debugfile, basename);
1187 if (separate_debug_file_exists (debugfile, crc32))
1191 return xstrdup (debugfile);
1200 /* This is the symbol-file command. Read the file, analyze its
1201 symbols, and add a struct symtab to a symtab list. The syntax of
1202 the command is rather bizarre--(1) buildargv implements various
1203 quoting conventions which are undocumented and have little or
1204 nothing in common with the way things are quoted (or not quoted)
1205 elsewhere in GDB, (2) options are used, which are not generally
1206 used in GDB (perhaps "set mapped on", "set readnow on" would be
1207 better), (3) the order of options matters, which is contrary to GNU
1208 conventions (because it is confusing and inconvenient). */
1209 /* Note: ezannoni 2000-04-17. This function used to have support for
1210 rombug (see remote-os9k.c). It consisted of a call to target_link()
1211 (target.c) to get the address of the text segment from the target,
1212 and pass that to symbol_file_add(). This is no longer supported. */
1215 symbol_file_command (char *args, int from_tty)
1219 struct cleanup *cleanups;
1220 int flags = OBJF_USERLOADED;
1226 symbol_file_clear (from_tty);
1230 if ((argv = buildargv (args)) == NULL)
1234 cleanups = make_cleanup_freeargv (argv);
1235 while (*argv != NULL)
1237 if (STREQ (*argv, "-mapped"))
1238 flags |= OBJF_MAPPED;
1240 if (STREQ (*argv, "-readnow"))
1241 flags |= OBJF_READNOW;
1244 error ("unknown option `%s'", *argv);
1249 symbol_file_add_main_1 (name, from_tty, flags);
1256 error ("no symbol file name was specified");
1258 do_cleanups (cleanups);
1262 /* Set the initial language.
1264 A better solution would be to record the language in the psymtab when reading
1265 partial symbols, and then use it (if known) to set the language. This would
1266 be a win for formats that encode the language in an easily discoverable place,
1267 such as DWARF. For stabs, we can jump through hoops looking for specially
1268 named symbols or try to intuit the language from the specific type of stabs
1269 we find, but we can't do that until later when we read in full symbols.
1273 set_initial_language (void)
1275 struct partial_symtab *pst;
1276 enum language lang = language_unknown;
1278 pst = find_main_psymtab ();
1281 if (pst->filename != NULL)
1283 lang = deduce_language_from_filename (pst->filename);
1285 if (lang == language_unknown)
1287 /* Make C the default language */
1290 set_language (lang);
1291 expected_language = current_language; /* Don't warn the user */
1295 /* Open file specified by NAME and hand it off to BFD for preliminary
1296 analysis. Result is a newly initialized bfd *, which includes a newly
1297 malloc'd` copy of NAME (tilde-expanded and made absolute).
1298 In case of trouble, error() is called. */
1301 symfile_bfd_open (char *name)
1305 char *absolute_name;
1309 name = tilde_expand (name); /* Returns 1st new malloc'd copy */
1311 /* Look down path for it, allocate 2nd new malloc'd copy. */
1312 desc = openp (getenv ("PATH"), 1, name, O_RDONLY | O_BINARY, 0, &absolute_name);
1313 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1316 char *exename = alloca (strlen (name) + 5);
1317 strcat (strcpy (exename, name), ".exe");
1318 desc = openp (getenv ("PATH"), 1, exename, O_RDONLY | O_BINARY,
1324 make_cleanup (xfree, name);
1325 perror_with_name (name);
1327 xfree (name); /* Free 1st new malloc'd copy */
1328 name = absolute_name; /* Keep 2nd malloc'd copy in bfd */
1329 /* It'll be freed in free_objfile(). */
1331 sym_bfd = bfd_fdopenr (name, gnutarget, desc);
1335 make_cleanup (xfree, name);
1336 error ("\"%s\": can't open to read symbols: %s.", name,
1337 bfd_errmsg (bfd_get_error ()));
1339 sym_bfd->cacheable = 1;
1341 if (!bfd_check_format (sym_bfd, bfd_object))
1343 /* FIXME: should be checking for errors from bfd_close (for one thing,
1344 on error it does not free all the storage associated with the
1346 bfd_close (sym_bfd); /* This also closes desc */
1347 make_cleanup (xfree, name);
1348 error ("\"%s\": can't read symbols: %s.", name,
1349 bfd_errmsg (bfd_get_error ()));
1354 /* Return the section index for the given section name. Return -1 if
1355 the section was not found. */
1357 get_section_index (struct objfile *objfile, char *section_name)
1359 asection *sect = bfd_get_section_by_name (objfile->obfd, section_name);
1366 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1367 startup by the _initialize routine in each object file format reader,
1368 to register information about each format the the reader is prepared
1372 add_symtab_fns (struct sym_fns *sf)
1374 sf->next = symtab_fns;
1379 /* Initialize to read symbols from the symbol file sym_bfd. It either
1380 returns or calls error(). The result is an initialized struct sym_fns
1381 in the objfile structure, that contains cached information about the
1385 find_sym_fns (struct objfile *objfile)
1388 enum bfd_flavour our_flavour = bfd_get_flavour (objfile->obfd);
1389 char *our_target = bfd_get_target (objfile->obfd);
1391 if (our_flavour == bfd_target_srec_flavour
1392 || our_flavour == bfd_target_ihex_flavour
1393 || our_flavour == bfd_target_tekhex_flavour)
1394 return; /* No symbols. */
1396 /* Special kludge for apollo. See dstread.c. */
1397 if (STREQN (our_target, "apollo", 6))
1398 our_flavour = (enum bfd_flavour) -2;
1400 for (sf = symtab_fns; sf != NULL; sf = sf->next)
1402 if (our_flavour == sf->sym_flavour)
1408 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
1409 bfd_get_target (objfile->obfd));
1412 /* This function runs the load command of our current target. */
1415 load_command (char *arg, int from_tty)
1418 arg = get_exec_file (1);
1419 target_load (arg, from_tty);
1421 /* After re-loading the executable, we don't really know which
1422 overlays are mapped any more. */
1423 overlay_cache_invalid = 1;
1426 /* This version of "load" should be usable for any target. Currently
1427 it is just used for remote targets, not inftarg.c or core files,
1428 on the theory that only in that case is it useful.
1430 Avoiding xmodem and the like seems like a win (a) because we don't have
1431 to worry about finding it, and (b) On VMS, fork() is very slow and so
1432 we don't want to run a subprocess. On the other hand, I'm not sure how
1433 performance compares. */
1435 static int download_write_size = 512;
1436 static int validate_download = 0;
1438 /* Callback service function for generic_load (bfd_map_over_sections). */
1441 add_section_size_callback (bfd *abfd, asection *asec, void *data)
1443 bfd_size_type *sum = data;
1445 *sum += bfd_get_section_size_before_reloc (asec);
1448 /* Opaque data for load_section_callback. */
1449 struct load_section_data {
1450 unsigned long load_offset;
1451 unsigned long write_count;
1452 unsigned long data_count;
1453 bfd_size_type total_size;
1456 /* Callback service function for generic_load (bfd_map_over_sections). */
1459 load_section_callback (bfd *abfd, asection *asec, void *data)
1461 struct load_section_data *args = data;
1463 if (bfd_get_section_flags (abfd, asec) & SEC_LOAD)
1465 bfd_size_type size = bfd_get_section_size_before_reloc (asec);
1469 struct cleanup *old_chain;
1470 CORE_ADDR lma = bfd_section_lma (abfd, asec) + args->load_offset;
1471 bfd_size_type block_size;
1473 const char *sect_name = bfd_get_section_name (abfd, asec);
1476 if (download_write_size > 0 && size > download_write_size)
1477 block_size = download_write_size;
1481 buffer = xmalloc (size);
1482 old_chain = make_cleanup (xfree, buffer);
1484 /* Is this really necessary? I guess it gives the user something
1485 to look at during a long download. */
1486 ui_out_message (uiout, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1487 sect_name, paddr_nz (size), paddr_nz (lma));
1489 bfd_get_section_contents (abfd, asec, buffer, 0, size);
1495 bfd_size_type this_transfer = size - sent;
1497 if (this_transfer >= block_size)
1498 this_transfer = block_size;
1499 len = target_write_memory_partial (lma, buffer,
1500 this_transfer, &err);
1503 if (validate_download)
1505 /* Broken memories and broken monitors manifest
1506 themselves here when bring new computers to
1507 life. This doubles already slow downloads. */
1508 /* NOTE: cagney/1999-10-18: A more efficient
1509 implementation might add a verify_memory()
1510 method to the target vector and then use
1511 that. remote.c could implement that method
1512 using the ``qCRC'' packet. */
1513 char *check = xmalloc (len);
1514 struct cleanup *verify_cleanups =
1515 make_cleanup (xfree, check);
1517 if (target_read_memory (lma, check, len) != 0)
1518 error ("Download verify read failed at 0x%s",
1520 if (memcmp (buffer, check, len) != 0)
1521 error ("Download verify compare failed at 0x%s",
1523 do_cleanups (verify_cleanups);
1525 args->data_count += len;
1528 args->write_count += 1;
1531 || (ui_load_progress_hook != NULL
1532 && ui_load_progress_hook (sect_name, sent)))
1533 error ("Canceled the download");
1535 if (show_load_progress != NULL)
1536 show_load_progress (sect_name, sent, size,
1537 args->data_count, args->total_size);
1539 while (sent < size);
1542 error ("Memory access error while loading section %s.", sect_name);
1544 do_cleanups (old_chain);
1550 generic_load (char *args, int from_tty)
1554 time_t start_time, end_time; /* Start and end times of download */
1556 struct cleanup *old_cleanups;
1558 struct load_section_data cbdata;
1561 cbdata.load_offset = 0; /* Offset to add to vma for each section. */
1562 cbdata.write_count = 0; /* Number of writes needed. */
1563 cbdata.data_count = 0; /* Number of bytes written to target memory. */
1564 cbdata.total_size = 0; /* Total size of all bfd sectors. */
1566 /* Parse the input argument - the user can specify a load offset as
1567 a second argument. */
1568 filename = xmalloc (strlen (args) + 1);
1569 old_cleanups = make_cleanup (xfree, filename);
1570 strcpy (filename, args);
1571 offptr = strchr (filename, ' ');
1576 cbdata.load_offset = strtoul (offptr, &endptr, 0);
1577 if (offptr == endptr)
1578 error ("Invalid download offset:%s\n", offptr);
1582 cbdata.load_offset = 0;
1584 /* Open the file for loading. */
1585 loadfile_bfd = bfd_openr (filename, gnutarget);
1586 if (loadfile_bfd == NULL)
1588 perror_with_name (filename);
1592 /* FIXME: should be checking for errors from bfd_close (for one thing,
1593 on error it does not free all the storage associated with the
1595 make_cleanup_bfd_close (loadfile_bfd);
1597 if (!bfd_check_format (loadfile_bfd, bfd_object))
1599 error ("\"%s\" is not an object file: %s", filename,
1600 bfd_errmsg (bfd_get_error ()));
1603 bfd_map_over_sections (loadfile_bfd, add_section_size_callback,
1604 (void *) &cbdata.total_size);
1606 start_time = time (NULL);
1608 bfd_map_over_sections (loadfile_bfd, load_section_callback, &cbdata);
1610 end_time = time (NULL);
1612 entry = bfd_get_start_address (loadfile_bfd);
1613 ui_out_text (uiout, "Start address ");
1614 ui_out_field_fmt (uiout, "address", "0x%s", paddr_nz (entry));
1615 ui_out_text (uiout, ", load size ");
1616 ui_out_field_fmt (uiout, "load-size", "%lu", cbdata.data_count);
1617 ui_out_text (uiout, "\n");
1618 /* We were doing this in remote-mips.c, I suspect it is right
1619 for other targets too. */
1622 /* FIXME: are we supposed to call symbol_file_add or not? According
1623 to a comment from remote-mips.c (where a call to symbol_file_add
1624 was commented out), making the call confuses GDB if more than one
1625 file is loaded in. Some targets do (e.g., remote-vx.c) but
1626 others don't (or didn't - perhaphs they have all been deleted). */
1628 print_transfer_performance (gdb_stdout, cbdata.data_count,
1629 cbdata.write_count, end_time - start_time);
1631 do_cleanups (old_cleanups);
1634 /* Report how fast the transfer went. */
1636 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1637 replaced by print_transfer_performance (with a very different
1638 function signature). */
1641 report_transfer_performance (unsigned long data_count, time_t start_time,
1644 print_transfer_performance (gdb_stdout, data_count,
1645 end_time - start_time, 0);
1649 print_transfer_performance (struct ui_file *stream,
1650 unsigned long data_count,
1651 unsigned long write_count,
1652 unsigned long time_count)
1654 ui_out_text (uiout, "Transfer rate: ");
1657 ui_out_field_fmt (uiout, "transfer-rate", "%lu",
1658 (data_count * 8) / time_count);
1659 ui_out_text (uiout, " bits/sec");
1663 ui_out_field_fmt (uiout, "transferred-bits", "%lu", (data_count * 8));
1664 ui_out_text (uiout, " bits in <1 sec");
1666 if (write_count > 0)
1668 ui_out_text (uiout, ", ");
1669 ui_out_field_fmt (uiout, "write-rate", "%lu", data_count / write_count);
1670 ui_out_text (uiout, " bytes/write");
1672 ui_out_text (uiout, ".\n");
1675 /* This function allows the addition of incrementally linked object files.
1676 It does not modify any state in the target, only in the debugger. */
1677 /* Note: ezannoni 2000-04-13 This function/command used to have a
1678 special case syntax for the rombug target (Rombug is the boot
1679 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
1680 rombug case, the user doesn't need to supply a text address,
1681 instead a call to target_link() (in target.c) would supply the
1682 value to use. We are now discontinuing this type of ad hoc syntax. */
1686 add_symbol_file_command (char *args, int from_tty)
1688 char *filename = NULL;
1689 int flags = OBJF_USERLOADED;
1691 int expecting_option = 0;
1692 int section_index = 0;
1696 int expecting_sec_name = 0;
1697 int expecting_sec_addr = 0;
1703 } sect_opts[SECT_OFF_MAX];
1705 struct section_addr_info section_addrs;
1706 struct cleanup *my_cleanups = make_cleanup (null_cleanup, NULL);
1711 error ("add-symbol-file takes a file name and an address");
1713 /* Make a copy of the string that we can safely write into. */
1714 args = xstrdup (args);
1716 /* Ensure section_addrs is initialized */
1717 memset (§ion_addrs, 0, sizeof (section_addrs));
1719 while (*args != '\000')
1721 /* Any leading spaces? */
1722 while (isspace (*args))
1725 /* Point arg to the beginning of the argument. */
1728 /* Move args pointer over the argument. */
1729 while ((*args != '\000') && !isspace (*args))
1732 /* If there are more arguments, terminate arg and
1734 if (*args != '\000')
1737 /* Now process the argument. */
1740 /* The first argument is the file name. */
1741 filename = tilde_expand (arg);
1742 make_cleanup (xfree, filename);
1747 /* The second argument is always the text address at which
1748 to load the program. */
1749 sect_opts[section_index].name = ".text";
1750 sect_opts[section_index].value = arg;
1755 /* It's an option (starting with '-') or it's an argument
1760 if (strcmp (arg, "-mapped") == 0)
1761 flags |= OBJF_MAPPED;
1763 if (strcmp (arg, "-readnow") == 0)
1764 flags |= OBJF_READNOW;
1766 if (strcmp (arg, "-s") == 0)
1768 if (section_index >= SECT_OFF_MAX)
1769 error ("Too many sections specified.");
1770 expecting_sec_name = 1;
1771 expecting_sec_addr = 1;
1776 if (expecting_sec_name)
1778 sect_opts[section_index].name = arg;
1779 expecting_sec_name = 0;
1782 if (expecting_sec_addr)
1784 sect_opts[section_index].value = arg;
1785 expecting_sec_addr = 0;
1789 error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*");
1795 /* Print the prompt for the query below. And save the arguments into
1796 a sect_addr_info structure to be passed around to other
1797 functions. We have to split this up into separate print
1798 statements because local_hex_string returns a local static
1801 printf_filtered ("add symbol table from file \"%s\" at\n", filename);
1802 for (i = 0; i < section_index; i++)
1805 char *val = sect_opts[i].value;
1806 char *sec = sect_opts[i].name;
1808 val = sect_opts[i].value;
1809 if (val[0] == '0' && val[1] == 'x')
1810 addr = strtoul (val+2, NULL, 16);
1812 addr = strtoul (val, NULL, 10);
1814 /* Here we store the section offsets in the order they were
1815 entered on the command line. */
1816 section_addrs.other[sec_num].name = sec;
1817 section_addrs.other[sec_num].addr = addr;
1818 printf_filtered ("\t%s_addr = %s\n",
1820 local_hex_string ((unsigned long)addr));
1823 /* The object's sections are initialized when a
1824 call is made to build_objfile_section_table (objfile).
1825 This happens in reread_symbols.
1826 At this point, we don't know what file type this is,
1827 so we can't determine what section names are valid. */
1830 if (from_tty && (!query ("%s", "")))
1831 error ("Not confirmed.");
1833 symbol_file_add (filename, from_tty, §ion_addrs, 0, flags);
1835 /* Getting new symbols may change our opinion about what is
1837 reinit_frame_cache ();
1838 do_cleanups (my_cleanups);
1842 add_shared_symbol_files_command (char *args, int from_tty)
1844 #ifdef ADD_SHARED_SYMBOL_FILES
1845 ADD_SHARED_SYMBOL_FILES (args, from_tty);
1847 error ("This command is not available in this configuration of GDB.");
1851 /* Re-read symbols if a symbol-file has changed. */
1853 reread_symbols (void)
1855 struct objfile *objfile;
1858 struct stat new_statbuf;
1861 /* With the addition of shared libraries, this should be modified,
1862 the load time should be saved in the partial symbol tables, since
1863 different tables may come from different source files. FIXME.
1864 This routine should then walk down each partial symbol table
1865 and see if the symbol table that it originates from has been changed */
1867 for (objfile = object_files; objfile; objfile = objfile->next)
1871 #ifdef IBM6000_TARGET
1872 /* If this object is from a shared library, then you should
1873 stat on the library name, not member name. */
1875 if (objfile->obfd->my_archive)
1876 res = stat (objfile->obfd->my_archive->filename, &new_statbuf);
1879 res = stat (objfile->name, &new_statbuf);
1882 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1883 printf_filtered ("`%s' has disappeared; keeping its symbols.\n",
1887 new_modtime = new_statbuf.st_mtime;
1888 if (new_modtime != objfile->mtime)
1890 struct cleanup *old_cleanups;
1891 struct section_offsets *offsets;
1893 char *obfd_filename;
1895 printf_filtered ("`%s' has changed; re-reading symbols.\n",
1898 /* There are various functions like symbol_file_add,
1899 symfile_bfd_open, syms_from_objfile, etc., which might
1900 appear to do what we want. But they have various other
1901 effects which we *don't* want. So we just do stuff
1902 ourselves. We don't worry about mapped files (for one thing,
1903 any mapped file will be out of date). */
1905 /* If we get an error, blow away this objfile (not sure if
1906 that is the correct response for things like shared
1908 old_cleanups = make_cleanup_free_objfile (objfile);
1909 /* We need to do this whenever any symbols go away. */
1910 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
1912 /* Clean up any state BFD has sitting around. We don't need
1913 to close the descriptor but BFD lacks a way of closing the
1914 BFD without closing the descriptor. */
1915 obfd_filename = bfd_get_filename (objfile->obfd);
1916 if (!bfd_close (objfile->obfd))
1917 error ("Can't close BFD for %s: %s", objfile->name,
1918 bfd_errmsg (bfd_get_error ()));
1919 objfile->obfd = bfd_openr (obfd_filename, gnutarget);
1920 if (objfile->obfd == NULL)
1921 error ("Can't open %s to read symbols.", objfile->name);
1922 /* bfd_openr sets cacheable to true, which is what we want. */
1923 if (!bfd_check_format (objfile->obfd, bfd_object))
1924 error ("Can't read symbols from %s: %s.", objfile->name,
1925 bfd_errmsg (bfd_get_error ()));
1927 /* Save the offsets, we will nuke them with the rest of the
1929 num_offsets = objfile->num_sections;
1930 offsets = (struct section_offsets *) alloca (SIZEOF_SECTION_OFFSETS);
1931 memcpy (offsets, objfile->section_offsets, SIZEOF_SECTION_OFFSETS);
1933 /* Nuke all the state that we will re-read. Much of the following
1934 code which sets things to NULL really is necessary to tell
1935 other parts of GDB that there is nothing currently there. */
1937 /* FIXME: Do we have to free a whole linked list, or is this
1939 if (objfile->global_psymbols.list)
1940 xmfree (objfile->md, objfile->global_psymbols.list);
1941 memset (&objfile->global_psymbols, 0,
1942 sizeof (objfile->global_psymbols));
1943 if (objfile->static_psymbols.list)
1944 xmfree (objfile->md, objfile->static_psymbols.list);
1945 memset (&objfile->static_psymbols, 0,
1946 sizeof (objfile->static_psymbols));
1948 /* Free the obstacks for non-reusable objfiles */
1949 bcache_xfree (objfile->psymbol_cache);
1950 objfile->psymbol_cache = bcache_xmalloc ();
1951 bcache_xfree (objfile->macro_cache);
1952 objfile->macro_cache = bcache_xmalloc ();
1953 if (objfile->demangled_names_hash != NULL)
1955 htab_delete (objfile->demangled_names_hash);
1956 objfile->demangled_names_hash = NULL;
1958 obstack_free (&objfile->psymbol_obstack, 0);
1959 obstack_free (&objfile->symbol_obstack, 0);
1960 obstack_free (&objfile->type_obstack, 0);
1961 objfile->sections = NULL;
1962 objfile->symtabs = NULL;
1963 objfile->psymtabs = NULL;
1964 objfile->free_psymtabs = NULL;
1965 objfile->msymbols = NULL;
1966 objfile->minimal_symbol_count = 0;
1967 memset (&objfile->msymbol_hash, 0,
1968 sizeof (objfile->msymbol_hash));
1969 memset (&objfile->msymbol_demangled_hash, 0,
1970 sizeof (objfile->msymbol_demangled_hash));
1971 objfile->fundamental_types = NULL;
1972 if (objfile->sf != NULL)
1974 (*objfile->sf->sym_finish) (objfile);
1977 /* We never make this a mapped file. */
1979 /* obstack_specify_allocation also initializes the obstack so
1981 objfile->psymbol_cache = bcache_xmalloc ();
1982 objfile->macro_cache = bcache_xmalloc ();
1983 obstack_specify_allocation (&objfile->psymbol_obstack, 0, 0,
1985 obstack_specify_allocation (&objfile->symbol_obstack, 0, 0,
1987 obstack_specify_allocation (&objfile->type_obstack, 0, 0,
1989 if (build_objfile_section_table (objfile))
1991 error ("Can't find the file sections in `%s': %s",
1992 objfile->name, bfd_errmsg (bfd_get_error ()));
1994 terminate_minimal_symbol_table (objfile);
1996 /* We use the same section offsets as from last time. I'm not
1997 sure whether that is always correct for shared libraries. */
1998 objfile->section_offsets = (struct section_offsets *)
1999 obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS);
2000 memcpy (objfile->section_offsets, offsets, SIZEOF_SECTION_OFFSETS);
2001 objfile->num_sections = num_offsets;
2003 /* What the hell is sym_new_init for, anyway? The concept of
2004 distinguishing between the main file and additional files
2005 in this way seems rather dubious. */
2006 if (objfile == symfile_objfile)
2008 (*objfile->sf->sym_new_init) (objfile);
2010 RESET_HP_UX_GLOBALS ();
2014 (*objfile->sf->sym_init) (objfile);
2015 clear_complaints (&symfile_complaints, 1, 1);
2016 /* The "mainline" parameter is a hideous hack; I think leaving it
2017 zero is OK since dbxread.c also does what it needs to do if
2018 objfile->global_psymbols.size is 0. */
2019 (*objfile->sf->sym_read) (objfile, 0);
2020 if (!have_partial_symbols () && !have_full_symbols ())
2023 printf_filtered ("(no debugging symbols found)\n");
2026 objfile->flags |= OBJF_SYMS;
2028 /* We're done reading the symbol file; finish off complaints. */
2029 clear_complaints (&symfile_complaints, 0, 1);
2031 /* Getting new symbols may change our opinion about what is
2034 reinit_frame_cache ();
2036 /* Discard cleanups as symbol reading was successful. */
2037 discard_cleanups (old_cleanups);
2039 /* If the mtime has changed between the time we set new_modtime
2040 and now, we *want* this to be out of date, so don't call stat
2042 objfile->mtime = new_modtime;
2045 /* Call this after reading in a new symbol table to give target
2046 dependent code a crack at the new symbols. For instance, this
2047 could be used to update the values of target-specific symbols GDB
2048 needs to keep track of (such as _sigtramp, or whatever). */
2050 TARGET_SYMFILE_POSTREAD (objfile);
2052 reread_separate_symbols (objfile);
2058 clear_symtab_users ();
2062 /* Handle separate debug info for OBJFILE, which has just been
2064 - If we had separate debug info before, but now we don't, get rid
2065 of the separated objfile.
2066 - If we didn't have separated debug info before, but now we do,
2067 read in the new separated debug info file.
2068 - If the debug link points to a different file, toss the old one
2069 and read the new one.
2070 This function does *not* handle the case where objfile is still
2071 using the same separate debug info file, but that file's timestamp
2072 has changed. That case should be handled by the loop in
2073 reread_symbols already. */
2075 reread_separate_symbols (struct objfile *objfile)
2078 unsigned long crc32;
2080 /* Does the updated objfile's debug info live in a
2082 debug_file = find_separate_debug_file (objfile);
2084 if (objfile->separate_debug_objfile)
2086 /* There are two cases where we need to get rid of
2087 the old separated debug info objfile:
2088 - if the new primary objfile doesn't have
2089 separated debug info, or
2090 - if the new primary objfile has separate debug
2091 info, but it's under a different filename.
2093 If the old and new objfiles both have separate
2094 debug info, under the same filename, then we're
2095 okay --- if the separated file's contents have
2096 changed, we will have caught that when we
2097 visited it in this function's outermost
2100 || strcmp (debug_file, objfile->separate_debug_objfile->name) != 0)
2101 free_objfile (objfile->separate_debug_objfile);
2104 /* If the new objfile has separate debug info, and we
2105 haven't loaded it already, do so now. */
2107 && ! objfile->separate_debug_objfile)
2109 /* Use the same section offset table as objfile itself.
2110 Preserve the flags from objfile that make sense. */
2111 objfile->separate_debug_objfile
2112 = (symbol_file_add_with_addrs_or_offsets
2114 info_verbose, /* from_tty: Don't override the default. */
2115 0, /* No addr table. */
2116 objfile->section_offsets, objfile->num_sections,
2117 0, /* Not mainline. See comments about this above. */
2118 objfile->flags & (OBJF_MAPPED | OBJF_REORDERED
2119 | OBJF_SHARED | OBJF_READNOW
2120 | OBJF_USERLOADED)));
2121 objfile->separate_debug_objfile->separate_debug_objfile_backlink
2137 static filename_language *filename_language_table;
2138 static int fl_table_size, fl_table_next;
2141 add_filename_language (char *ext, enum language lang)
2143 if (fl_table_next >= fl_table_size)
2145 fl_table_size += 10;
2146 filename_language_table =
2147 xrealloc (filename_language_table,
2148 fl_table_size * sizeof (*filename_language_table));
2151 filename_language_table[fl_table_next].ext = xstrdup (ext);
2152 filename_language_table[fl_table_next].lang = lang;
2156 static char *ext_args;
2159 set_ext_lang_command (char *args, int from_tty)
2162 char *cp = ext_args;
2165 /* First arg is filename extension, starting with '.' */
2167 error ("'%s': Filename extension must begin with '.'", ext_args);
2169 /* Find end of first arg. */
2170 while (*cp && !isspace (*cp))
2174 error ("'%s': two arguments required -- filename extension and language",
2177 /* Null-terminate first arg */
2180 /* Find beginning of second arg, which should be a source language. */
2181 while (*cp && isspace (*cp))
2185 error ("'%s': two arguments required -- filename extension and language",
2188 /* Lookup the language from among those we know. */
2189 lang = language_enum (cp);
2191 /* Now lookup the filename extension: do we already know it? */
2192 for (i = 0; i < fl_table_next; i++)
2193 if (0 == strcmp (ext_args, filename_language_table[i].ext))
2196 if (i >= fl_table_next)
2198 /* new file extension */
2199 add_filename_language (ext_args, lang);
2203 /* redefining a previously known filename extension */
2206 /* query ("Really make files of type %s '%s'?", */
2207 /* ext_args, language_str (lang)); */
2209 xfree (filename_language_table[i].ext);
2210 filename_language_table[i].ext = xstrdup (ext_args);
2211 filename_language_table[i].lang = lang;
2216 info_ext_lang_command (char *args, int from_tty)
2220 printf_filtered ("Filename extensions and the languages they represent:");
2221 printf_filtered ("\n\n");
2222 for (i = 0; i < fl_table_next; i++)
2223 printf_filtered ("\t%s\t- %s\n",
2224 filename_language_table[i].ext,
2225 language_str (filename_language_table[i].lang));
2229 init_filename_language_table (void)
2231 if (fl_table_size == 0) /* protect against repetition */
2235 filename_language_table =
2236 xmalloc (fl_table_size * sizeof (*filename_language_table));
2237 add_filename_language (".c", language_c);
2238 add_filename_language (".C", language_cplus);
2239 add_filename_language (".cc", language_cplus);
2240 add_filename_language (".cp", language_cplus);
2241 add_filename_language (".cpp", language_cplus);
2242 add_filename_language (".cxx", language_cplus);
2243 add_filename_language (".c++", language_cplus);
2244 add_filename_language (".java", language_java);
2245 add_filename_language (".class", language_java);
2246 add_filename_language (".m", language_objc);
2247 add_filename_language (".f", language_fortran);
2248 add_filename_language (".F", language_fortran);
2249 add_filename_language (".s", language_asm);
2250 add_filename_language (".S", language_asm);
2251 add_filename_language (".pas", language_pascal);
2252 add_filename_language (".p", language_pascal);
2253 add_filename_language (".pp", language_pascal);
2258 deduce_language_from_filename (char *filename)
2263 if (filename != NULL)
2264 if ((cp = strrchr (filename, '.')) != NULL)
2265 for (i = 0; i < fl_table_next; i++)
2266 if (strcmp (cp, filename_language_table[i].ext) == 0)
2267 return filename_language_table[i].lang;
2269 return language_unknown;
2274 Allocate and partly initialize a new symbol table. Return a pointer
2275 to it. error() if no space.
2277 Caller must set these fields:
2283 possibly free_named_symtabs (symtab->filename);
2287 allocate_symtab (char *filename, struct objfile *objfile)
2289 register struct symtab *symtab;
2291 symtab = (struct symtab *)
2292 obstack_alloc (&objfile->symbol_obstack, sizeof (struct symtab));
2293 memset (symtab, 0, sizeof (*symtab));
2294 symtab->filename = obsavestring (filename, strlen (filename),
2295 &objfile->symbol_obstack);
2296 symtab->fullname = NULL;
2297 symtab->language = deduce_language_from_filename (filename);
2298 symtab->debugformat = obsavestring ("unknown", 7,
2299 &objfile->symbol_obstack);
2301 /* Hook it to the objfile it comes from */
2303 symtab->objfile = objfile;
2304 symtab->next = objfile->symtabs;
2305 objfile->symtabs = symtab;
2307 /* FIXME: This should go away. It is only defined for the Z8000,
2308 and the Z8000 definition of this macro doesn't have anything to
2309 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
2310 here for convenience. */
2311 #ifdef INIT_EXTRA_SYMTAB_INFO
2312 INIT_EXTRA_SYMTAB_INFO (symtab);
2318 struct partial_symtab *
2319 allocate_psymtab (char *filename, struct objfile *objfile)
2321 struct partial_symtab *psymtab;
2323 if (objfile->free_psymtabs)
2325 psymtab = objfile->free_psymtabs;
2326 objfile->free_psymtabs = psymtab->next;
2329 psymtab = (struct partial_symtab *)
2330 obstack_alloc (&objfile->psymbol_obstack,
2331 sizeof (struct partial_symtab));
2333 memset (psymtab, 0, sizeof (struct partial_symtab));
2334 psymtab->filename = obsavestring (filename, strlen (filename),
2335 &objfile->psymbol_obstack);
2336 psymtab->symtab = NULL;
2338 /* Prepend it to the psymtab list for the objfile it belongs to.
2339 Psymtabs are searched in most recent inserted -> least recent
2342 psymtab->objfile = objfile;
2343 psymtab->next = objfile->psymtabs;
2344 objfile->psymtabs = psymtab;
2347 struct partial_symtab **prev_pst;
2348 psymtab->objfile = objfile;
2349 psymtab->next = NULL;
2350 prev_pst = &(objfile->psymtabs);
2351 while ((*prev_pst) != NULL)
2352 prev_pst = &((*prev_pst)->next);
2353 (*prev_pst) = psymtab;
2361 discard_psymtab (struct partial_symtab *pst)
2363 struct partial_symtab **prev_pst;
2366 Empty psymtabs happen as a result of header files which don't
2367 have any symbols in them. There can be a lot of them. But this
2368 check is wrong, in that a psymtab with N_SLINE entries but
2369 nothing else is not empty, but we don't realize that. Fixing
2370 that without slowing things down might be tricky. */
2372 /* First, snip it out of the psymtab chain */
2374 prev_pst = &(pst->objfile->psymtabs);
2375 while ((*prev_pst) != pst)
2376 prev_pst = &((*prev_pst)->next);
2377 (*prev_pst) = pst->next;
2379 /* Next, put it on a free list for recycling */
2381 pst->next = pst->objfile->free_psymtabs;
2382 pst->objfile->free_psymtabs = pst;
2386 /* Reset all data structures in gdb which may contain references to symbol
2390 clear_symtab_users (void)
2392 /* Someday, we should do better than this, by only blowing away
2393 the things that really need to be blown. */
2394 clear_value_history ();
2396 clear_internalvars ();
2397 breakpoint_re_set ();
2398 set_default_breakpoint (0, 0, 0, 0);
2399 clear_current_source_symtab_and_line ();
2400 clear_pc_function_cache ();
2401 if (target_new_objfile_hook)
2402 target_new_objfile_hook (NULL);
2406 clear_symtab_users_cleanup (void *ignore)
2408 clear_symtab_users ();
2411 /* clear_symtab_users_once:
2413 This function is run after symbol reading, or from a cleanup.
2414 If an old symbol table was obsoleted, the old symbol table
2415 has been blown away, but the other GDB data structures that may
2416 reference it have not yet been cleared or re-directed. (The old
2417 symtab was zapped, and the cleanup queued, in free_named_symtab()
2420 This function can be queued N times as a cleanup, or called
2421 directly; it will do all the work the first time, and then will be a
2422 no-op until the next time it is queued. This works by bumping a
2423 counter at queueing time. Much later when the cleanup is run, or at
2424 the end of symbol processing (in case the cleanup is discarded), if
2425 the queued count is greater than the "done-count", we do the work
2426 and set the done-count to the queued count. If the queued count is
2427 less than or equal to the done-count, we just ignore the call. This
2428 is needed because reading a single .o file will often replace many
2429 symtabs (one per .h file, for example), and we don't want to reset
2430 the breakpoints N times in the user's face.
2432 The reason we both queue a cleanup, and call it directly after symbol
2433 reading, is because the cleanup protects us in case of errors, but is
2434 discarded if symbol reading is successful. */
2437 /* FIXME: As free_named_symtabs is currently a big noop this function
2438 is no longer needed. */
2439 static void clear_symtab_users_once (void);
2441 static int clear_symtab_users_queued;
2442 static int clear_symtab_users_done;
2445 clear_symtab_users_once (void)
2447 /* Enforce once-per-`do_cleanups'-semantics */
2448 if (clear_symtab_users_queued <= clear_symtab_users_done)
2450 clear_symtab_users_done = clear_symtab_users_queued;
2452 clear_symtab_users ();
2456 /* Delete the specified psymtab, and any others that reference it. */
2459 cashier_psymtab (struct partial_symtab *pst)
2461 struct partial_symtab *ps, *pprev = NULL;
2464 /* Find its previous psymtab in the chain */
2465 for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
2474 /* Unhook it from the chain. */
2475 if (ps == pst->objfile->psymtabs)
2476 pst->objfile->psymtabs = ps->next;
2478 pprev->next = ps->next;
2480 /* FIXME, we can't conveniently deallocate the entries in the
2481 partial_symbol lists (global_psymbols/static_psymbols) that
2482 this psymtab points to. These just take up space until all
2483 the psymtabs are reclaimed. Ditto the dependencies list and
2484 filename, which are all in the psymbol_obstack. */
2486 /* We need to cashier any psymtab that has this one as a dependency... */
2488 for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
2490 for (i = 0; i < ps->number_of_dependencies; i++)
2492 if (ps->dependencies[i] == pst)
2494 cashier_psymtab (ps);
2495 goto again; /* Must restart, chain has been munged. */
2502 /* If a symtab or psymtab for filename NAME is found, free it along
2503 with any dependent breakpoints, displays, etc.
2504 Used when loading new versions of object modules with the "add-file"
2505 command. This is only called on the top-level symtab or psymtab's name;
2506 it is not called for subsidiary files such as .h files.
2508 Return value is 1 if we blew away the environment, 0 if not.
2509 FIXME. The return value appears to never be used.
2511 FIXME. I think this is not the best way to do this. We should
2512 work on being gentler to the environment while still cleaning up
2513 all stray pointers into the freed symtab. */
2516 free_named_symtabs (char *name)
2519 /* FIXME: With the new method of each objfile having it's own
2520 psymtab list, this function needs serious rethinking. In particular,
2521 why was it ever necessary to toss psymtabs with specific compilation
2522 unit filenames, as opposed to all psymtabs from a particular symbol
2524 Well, the answer is that some systems permit reloading of particular
2525 compilation units. We want to blow away any old info about these
2526 compilation units, regardless of which objfiles they arrived in. --gnu. */
2528 register struct symtab *s;
2529 register struct symtab *prev;
2530 register struct partial_symtab *ps;
2531 struct blockvector *bv;
2534 /* We only wack things if the symbol-reload switch is set. */
2535 if (!symbol_reloading)
2538 /* Some symbol formats have trouble providing file names... */
2539 if (name == 0 || *name == '\0')
2542 /* Look for a psymtab with the specified name. */
2545 for (ps = partial_symtab_list; ps; ps = ps->next)
2547 if (STREQ (name, ps->filename))
2549 cashier_psymtab (ps); /* Blow it away...and its little dog, too. */
2550 goto again2; /* Must restart, chain has been munged */
2554 /* Look for a symtab with the specified name. */
2556 for (s = symtab_list; s; s = s->next)
2558 if (STREQ (name, s->filename))
2565 if (s == symtab_list)
2566 symtab_list = s->next;
2568 prev->next = s->next;
2570 /* For now, queue a delete for all breakpoints, displays, etc., whether
2571 or not they depend on the symtab being freed. This should be
2572 changed so that only those data structures affected are deleted. */
2574 /* But don't delete anything if the symtab is empty.
2575 This test is necessary due to a bug in "dbxread.c" that
2576 causes empty symtabs to be created for N_SO symbols that
2577 contain the pathname of the object file. (This problem
2578 has been fixed in GDB 3.9x). */
2580 bv = BLOCKVECTOR (s);
2581 if (BLOCKVECTOR_NBLOCKS (bv) > 2
2582 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK))
2583 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)))
2585 complaint (&symfile_complaints, "Replacing old symbols for `%s'",
2587 clear_symtab_users_queued++;
2588 make_cleanup (clear_symtab_users_once, 0);
2593 complaint (&symfile_complaints, "Empty symbol table found for `%s'",
2601 /* It is still possible that some breakpoints will be affected
2602 even though no symtab was found, since the file might have
2603 been compiled without debugging, and hence not be associated
2604 with a symtab. In order to handle this correctly, we would need
2605 to keep a list of text address ranges for undebuggable files.
2606 For now, we do nothing, since this is a fairly obscure case. */
2610 /* FIXME, what about the minimal symbol table? */
2617 /* Allocate and partially fill a partial symtab. It will be
2618 completely filled at the end of the symbol list.
2620 FILENAME is the name of the symbol-file we are reading from. */
2622 struct partial_symtab *
2623 start_psymtab_common (struct objfile *objfile,
2624 struct section_offsets *section_offsets, char *filename,
2625 CORE_ADDR textlow, struct partial_symbol **global_syms,
2626 struct partial_symbol **static_syms)
2628 struct partial_symtab *psymtab;
2630 psymtab = allocate_psymtab (filename, objfile);
2631 psymtab->section_offsets = section_offsets;
2632 psymtab->textlow = textlow;
2633 psymtab->texthigh = psymtab->textlow; /* default */
2634 psymtab->globals_offset = global_syms - objfile->global_psymbols.list;
2635 psymtab->statics_offset = static_syms - objfile->static_psymbols.list;
2639 /* Add a symbol with a long value to a psymtab.
2640 Since one arg is a struct, we pass in a ptr and deref it (sigh). */
2643 add_psymbol_to_list (char *name, int namelength, namespace_enum namespace,
2644 enum address_class class,
2645 struct psymbol_allocation_list *list, long val, /* Value as a long */
2646 CORE_ADDR coreaddr, /* Value as a CORE_ADDR */
2647 enum language language, struct objfile *objfile)
2649 register struct partial_symbol *psym;
2650 char *buf = alloca (namelength + 1);
2651 /* psymbol is static so that there will be no uninitialized gaps in the
2652 structure which might contain random data, causing cache misses in
2654 static struct partial_symbol psymbol;
2656 /* Create local copy of the partial symbol */
2657 memcpy (buf, name, namelength);
2658 buf[namelength] = '\0';
2659 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2662 SYMBOL_VALUE (&psymbol) = val;
2666 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
2668 SYMBOL_SECTION (&psymbol) = 0;
2669 SYMBOL_LANGUAGE (&psymbol) = language;
2670 PSYMBOL_NAMESPACE (&psymbol) = namespace;
2671 PSYMBOL_CLASS (&psymbol) = class;
2673 SYMBOL_SET_NAMES (&psymbol, buf, namelength, objfile);
2675 /* Stash the partial symbol away in the cache */
2676 psym = bcache (&psymbol, sizeof (struct partial_symbol), objfile->psymbol_cache);
2678 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2679 if (list->next >= list->list + list->size)
2681 extend_psymbol_list (list, objfile);
2683 *list->next++ = psym;
2684 OBJSTAT (objfile, n_psyms++);
2687 /* Add a symbol with a long value to a psymtab. This differs from
2688 * add_psymbol_to_list above in taking both a mangled and a demangled
2692 add_psymbol_with_dem_name_to_list (char *name, int namelength, char *dem_name,
2693 int dem_namelength, namespace_enum namespace,
2694 enum address_class class,
2695 struct psymbol_allocation_list *list, long val, /* Value as a long */
2696 CORE_ADDR coreaddr, /* Value as a CORE_ADDR */
2697 enum language language,
2698 struct objfile *objfile)
2700 register struct partial_symbol *psym;
2701 char *buf = alloca (namelength + 1);
2702 /* psymbol is static so that there will be no uninitialized gaps in the
2703 structure which might contain random data, causing cache misses in
2705 static struct partial_symbol psymbol;
2707 /* Create local copy of the partial symbol */
2709 memcpy (buf, name, namelength);
2710 buf[namelength] = '\0';
2711 DEPRECATED_SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, objfile->psymbol_cache);
2713 buf = alloca (dem_namelength + 1);
2714 memcpy (buf, dem_name, dem_namelength);
2715 buf[dem_namelength] = '\0';
2720 case language_cplus:
2721 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol) =
2722 bcache (buf, dem_namelength + 1, objfile->psymbol_cache);
2724 /* FIXME What should be done for the default case? Ignoring for now. */
2727 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2730 SYMBOL_VALUE (&psymbol) = val;
2734 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
2736 SYMBOL_SECTION (&psymbol) = 0;
2737 SYMBOL_LANGUAGE (&psymbol) = language;
2738 PSYMBOL_NAMESPACE (&psymbol) = namespace;
2739 PSYMBOL_CLASS (&psymbol) = class;
2740 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language);
2742 /* Stash the partial symbol away in the cache */
2743 psym = bcache (&psymbol, sizeof (struct partial_symbol), objfile->psymbol_cache);
2745 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2746 if (list->next >= list->list + list->size)
2748 extend_psymbol_list (list, objfile);
2750 *list->next++ = psym;
2751 OBJSTAT (objfile, n_psyms++);
2754 /* Initialize storage for partial symbols. */
2757 init_psymbol_list (struct objfile *objfile, int total_symbols)
2759 /* Free any previously allocated psymbol lists. */
2761 if (objfile->global_psymbols.list)
2763 xmfree (objfile->md, objfile->global_psymbols.list);
2765 if (objfile->static_psymbols.list)
2767 xmfree (objfile->md, objfile->static_psymbols.list);
2770 /* Current best guess is that approximately a twentieth
2771 of the total symbols (in a debugging file) are global or static
2774 objfile->global_psymbols.size = total_symbols / 10;
2775 objfile->static_psymbols.size = total_symbols / 10;
2777 if (objfile->global_psymbols.size > 0)
2779 objfile->global_psymbols.next =
2780 objfile->global_psymbols.list = (struct partial_symbol **)
2781 xmmalloc (objfile->md, (objfile->global_psymbols.size
2782 * sizeof (struct partial_symbol *)));
2784 if (objfile->static_psymbols.size > 0)
2786 objfile->static_psymbols.next =
2787 objfile->static_psymbols.list = (struct partial_symbol **)
2788 xmmalloc (objfile->md, (objfile->static_psymbols.size
2789 * sizeof (struct partial_symbol *)));
2794 The following code implements an abstraction for debugging overlay sections.
2796 The target model is as follows:
2797 1) The gnu linker will permit multiple sections to be mapped into the
2798 same VMA, each with its own unique LMA (or load address).
2799 2) It is assumed that some runtime mechanism exists for mapping the
2800 sections, one by one, from the load address into the VMA address.
2801 3) This code provides a mechanism for gdb to keep track of which
2802 sections should be considered to be mapped from the VMA to the LMA.
2803 This information is used for symbol lookup, and memory read/write.
2804 For instance, if a section has been mapped then its contents
2805 should be read from the VMA, otherwise from the LMA.
2807 Two levels of debugger support for overlays are available. One is
2808 "manual", in which the debugger relies on the user to tell it which
2809 overlays are currently mapped. This level of support is
2810 implemented entirely in the core debugger, and the information about
2811 whether a section is mapped is kept in the objfile->obj_section table.
2813 The second level of support is "automatic", and is only available if
2814 the target-specific code provides functionality to read the target's
2815 overlay mapping table, and translate its contents for the debugger
2816 (by updating the mapped state information in the obj_section tables).
2818 The interface is as follows:
2820 overlay map <name> -- tell gdb to consider this section mapped
2821 overlay unmap <name> -- tell gdb to consider this section unmapped
2822 overlay list -- list the sections that GDB thinks are mapped
2823 overlay read-target -- get the target's state of what's mapped
2824 overlay off/manual/auto -- set overlay debugging state
2825 Functional interface:
2826 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2827 section, return that section.
2828 find_pc_overlay(pc): find any overlay section that contains
2829 the pc, either in its VMA or its LMA
2830 overlay_is_mapped(sect): true if overlay is marked as mapped
2831 section_is_overlay(sect): true if section's VMA != LMA
2832 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2833 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2834 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2835 overlay_mapped_address(...): map an address from section's LMA to VMA
2836 overlay_unmapped_address(...): map an address from section's VMA to LMA
2837 symbol_overlayed_address(...): Return a "current" address for symbol:
2838 either in VMA or LMA depending on whether
2839 the symbol's section is currently mapped
2842 /* Overlay debugging state: */
2844 enum overlay_debugging_state overlay_debugging = ovly_off;
2845 int overlay_cache_invalid = 0; /* True if need to refresh mapped state */
2847 /* Target vector for refreshing overlay mapped state */
2848 static void simple_overlay_update (struct obj_section *);
2849 void (*target_overlay_update) (struct obj_section *) = simple_overlay_update;
2851 /* Function: section_is_overlay (SECTION)
2852 Returns true if SECTION has VMA not equal to LMA, ie.
2853 SECTION is loaded at an address different from where it will "run". */
2856 section_is_overlay (asection *section)
2858 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2860 if (overlay_debugging)
2861 if (section && section->lma != 0 &&
2862 section->vma != section->lma)
2868 /* Function: overlay_invalidate_all (void)
2869 Invalidate the mapped state of all overlay sections (mark it as stale). */
2872 overlay_invalidate_all (void)
2874 struct objfile *objfile;
2875 struct obj_section *sect;
2877 ALL_OBJSECTIONS (objfile, sect)
2878 if (section_is_overlay (sect->the_bfd_section))
2879 sect->ovly_mapped = -1;
2882 /* Function: overlay_is_mapped (SECTION)
2883 Returns true if section is an overlay, and is currently mapped.
2884 Private: public access is thru function section_is_mapped.
2886 Access to the ovly_mapped flag is restricted to this function, so
2887 that we can do automatic update. If the global flag
2888 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2889 overlay_invalidate_all. If the mapped state of the particular
2890 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2893 overlay_is_mapped (struct obj_section *osect)
2895 if (osect == 0 || !section_is_overlay (osect->the_bfd_section))
2898 switch (overlay_debugging)
2902 return 0; /* overlay debugging off */
2903 case ovly_auto: /* overlay debugging automatic */
2904 /* Unles there is a target_overlay_update function,
2905 there's really nothing useful to do here (can't really go auto) */
2906 if (target_overlay_update)
2908 if (overlay_cache_invalid)
2910 overlay_invalidate_all ();
2911 overlay_cache_invalid = 0;
2913 if (osect->ovly_mapped == -1)
2914 (*target_overlay_update) (osect);
2916 /* fall thru to manual case */
2917 case ovly_on: /* overlay debugging manual */
2918 return osect->ovly_mapped == 1;
2922 /* Function: section_is_mapped
2923 Returns true if section is an overlay, and is currently mapped. */
2926 section_is_mapped (asection *section)
2928 struct objfile *objfile;
2929 struct obj_section *osect;
2931 if (overlay_debugging)
2932 if (section && section_is_overlay (section))
2933 ALL_OBJSECTIONS (objfile, osect)
2934 if (osect->the_bfd_section == section)
2935 return overlay_is_mapped (osect);
2940 /* Function: pc_in_unmapped_range
2941 If PC falls into the lma range of SECTION, return true, else false. */
2944 pc_in_unmapped_range (CORE_ADDR pc, asection *section)
2946 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2950 if (overlay_debugging)
2951 if (section && section_is_overlay (section))
2953 size = bfd_get_section_size_before_reloc (section);
2954 if (section->lma <= pc && pc < section->lma + size)
2960 /* Function: pc_in_mapped_range
2961 If PC falls into the vma range of SECTION, return true, else false. */
2964 pc_in_mapped_range (CORE_ADDR pc, asection *section)
2966 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2970 if (overlay_debugging)
2971 if (section && section_is_overlay (section))
2973 size = bfd_get_section_size_before_reloc (section);
2974 if (section->vma <= pc && pc < section->vma + size)
2981 /* Return true if the mapped ranges of sections A and B overlap, false
2984 sections_overlap (asection *a, asection *b)
2986 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2988 CORE_ADDR a_start = a->vma;
2989 CORE_ADDR a_end = a->vma + bfd_get_section_size_before_reloc (a);
2990 CORE_ADDR b_start = b->vma;
2991 CORE_ADDR b_end = b->vma + bfd_get_section_size_before_reloc (b);
2993 return (a_start < b_end && b_start < a_end);
2996 /* Function: overlay_unmapped_address (PC, SECTION)
2997 Returns the address corresponding to PC in the unmapped (load) range.
2998 May be the same as PC. */
3001 overlay_unmapped_address (CORE_ADDR pc, asection *section)
3003 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
3005 if (overlay_debugging)
3006 if (section && section_is_overlay (section) &&
3007 pc_in_mapped_range (pc, section))
3008 return pc + section->lma - section->vma;
3013 /* Function: overlay_mapped_address (PC, SECTION)
3014 Returns the address corresponding to PC in the mapped (runtime) range.
3015 May be the same as PC. */
3018 overlay_mapped_address (CORE_ADDR pc, asection *section)
3020 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3022 if (overlay_debugging)
3023 if (section && section_is_overlay (section) &&
3024 pc_in_unmapped_range (pc, section))
3025 return pc + section->vma - section->lma;
3031 /* Function: symbol_overlayed_address
3032 Return one of two addresses (relative to the VMA or to the LMA),
3033 depending on whether the section is mapped or not. */
3036 symbol_overlayed_address (CORE_ADDR address, asection *section)
3038 if (overlay_debugging)
3040 /* If the symbol has no section, just return its regular address. */
3043 /* If the symbol's section is not an overlay, just return its address */
3044 if (!section_is_overlay (section))
3046 /* If the symbol's section is mapped, just return its address */
3047 if (section_is_mapped (section))
3050 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3051 * then return its LOADED address rather than its vma address!!
3053 return overlay_unmapped_address (address, section);
3058 /* Function: find_pc_overlay (PC)
3059 Return the best-match overlay section for PC:
3060 If PC matches a mapped overlay section's VMA, return that section.
3061 Else if PC matches an unmapped section's VMA, return that section.
3062 Else if PC matches an unmapped section's LMA, return that section. */
3065 find_pc_overlay (CORE_ADDR pc)
3067 struct objfile *objfile;
3068 struct obj_section *osect, *best_match = NULL;
3070 if (overlay_debugging)
3071 ALL_OBJSECTIONS (objfile, osect)
3072 if (section_is_overlay (osect->the_bfd_section))
3074 if (pc_in_mapped_range (pc, osect->the_bfd_section))
3076 if (overlay_is_mapped (osect))
3077 return osect->the_bfd_section;
3081 else if (pc_in_unmapped_range (pc, osect->the_bfd_section))
3084 return best_match ? best_match->the_bfd_section : NULL;
3087 /* Function: find_pc_mapped_section (PC)
3088 If PC falls into the VMA address range of an overlay section that is
3089 currently marked as MAPPED, return that section. Else return NULL. */
3092 find_pc_mapped_section (CORE_ADDR pc)
3094 struct objfile *objfile;
3095 struct obj_section *osect;
3097 if (overlay_debugging)
3098 ALL_OBJSECTIONS (objfile, osect)
3099 if (pc_in_mapped_range (pc, osect->the_bfd_section) &&
3100 overlay_is_mapped (osect))
3101 return osect->the_bfd_section;
3106 /* Function: list_overlays_command
3107 Print a list of mapped sections and their PC ranges */
3110 list_overlays_command (char *args, int from_tty)
3113 struct objfile *objfile;
3114 struct obj_section *osect;
3116 if (overlay_debugging)
3117 ALL_OBJSECTIONS (objfile, osect)
3118 if (overlay_is_mapped (osect))
3124 vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section);
3125 lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section);
3126 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
3127 name = bfd_section_name (objfile->obfd, osect->the_bfd_section);
3129 printf_filtered ("Section %s, loaded at ", name);
3130 print_address_numeric (lma, 1, gdb_stdout);
3131 puts_filtered (" - ");
3132 print_address_numeric (lma + size, 1, gdb_stdout);
3133 printf_filtered (", mapped at ");
3134 print_address_numeric (vma, 1, gdb_stdout);
3135 puts_filtered (" - ");
3136 print_address_numeric (vma + size, 1, gdb_stdout);
3137 puts_filtered ("\n");
3142 printf_filtered ("No sections are mapped.\n");
3145 /* Function: map_overlay_command
3146 Mark the named section as mapped (ie. residing at its VMA address). */
3149 map_overlay_command (char *args, int from_tty)
3151 struct objfile *objfile, *objfile2;
3152 struct obj_section *sec, *sec2;
3155 if (!overlay_debugging)
3157 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3158 the 'overlay manual' command.");
3160 if (args == 0 || *args == 0)
3161 error ("Argument required: name of an overlay section");
3163 /* First, find a section matching the user supplied argument */
3164 ALL_OBJSECTIONS (objfile, sec)
3165 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
3167 /* Now, check to see if the section is an overlay. */
3168 bfdsec = sec->the_bfd_section;
3169 if (!section_is_overlay (bfdsec))
3170 continue; /* not an overlay section */
3172 /* Mark the overlay as "mapped" */
3173 sec->ovly_mapped = 1;
3175 /* Next, make a pass and unmap any sections that are
3176 overlapped by this new section: */
3177 ALL_OBJSECTIONS (objfile2, sec2)
3178 if (sec2->ovly_mapped
3180 && sec->the_bfd_section != sec2->the_bfd_section
3181 && sections_overlap (sec->the_bfd_section,
3182 sec2->the_bfd_section))
3185 printf_filtered ("Note: section %s unmapped by overlap\n",
3186 bfd_section_name (objfile->obfd,
3187 sec2->the_bfd_section));
3188 sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2 */
3192 error ("No overlay section called %s", args);
3195 /* Function: unmap_overlay_command
3196 Mark the overlay section as unmapped
3197 (ie. resident in its LMA address range, rather than the VMA range). */
3200 unmap_overlay_command (char *args, int from_tty)
3202 struct objfile *objfile;
3203 struct obj_section *sec;
3205 if (!overlay_debugging)
3207 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3208 the 'overlay manual' command.");
3210 if (args == 0 || *args == 0)
3211 error ("Argument required: name of an overlay section");
3213 /* First, find a section matching the user supplied argument */
3214 ALL_OBJSECTIONS (objfile, sec)
3215 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
3217 if (!sec->ovly_mapped)
3218 error ("Section %s is not mapped", args);
3219 sec->ovly_mapped = 0;
3222 error ("No overlay section called %s", args);
3225 /* Function: overlay_auto_command
3226 A utility command to turn on overlay debugging.
3227 Possibly this should be done via a set/show command. */
3230 overlay_auto_command (char *args, int from_tty)
3232 overlay_debugging = ovly_auto;
3233 enable_overlay_breakpoints ();
3235 printf_filtered ("Automatic overlay debugging enabled.");
3238 /* Function: overlay_manual_command
3239 A utility command to turn on overlay debugging.
3240 Possibly this should be done via a set/show command. */
3243 overlay_manual_command (char *args, int from_tty)
3245 overlay_debugging = ovly_on;
3246 disable_overlay_breakpoints ();
3248 printf_filtered ("Overlay debugging enabled.");
3251 /* Function: overlay_off_command
3252 A utility command to turn on overlay debugging.
3253 Possibly this should be done via a set/show command. */
3256 overlay_off_command (char *args, int from_tty)
3258 overlay_debugging = ovly_off;
3259 disable_overlay_breakpoints ();
3261 printf_filtered ("Overlay debugging disabled.");
3265 overlay_load_command (char *args, int from_tty)
3267 if (target_overlay_update)
3268 (*target_overlay_update) (NULL);
3270 error ("This target does not know how to read its overlay state.");
3273 /* Function: overlay_command
3274 A place-holder for a mis-typed command */
3276 /* Command list chain containing all defined "overlay" subcommands. */
3277 struct cmd_list_element *overlaylist;
3280 overlay_command (char *args, int from_tty)
3283 ("\"overlay\" must be followed by the name of an overlay command.\n");
3284 help_list (overlaylist, "overlay ", -1, gdb_stdout);
3288 /* Target Overlays for the "Simplest" overlay manager:
3290 This is GDB's default target overlay layer. It works with the
3291 minimal overlay manager supplied as an example by Cygnus. The
3292 entry point is via a function pointer "target_overlay_update",
3293 so targets that use a different runtime overlay manager can
3294 substitute their own overlay_update function and take over the
3297 The overlay_update function pokes around in the target's data structures
3298 to see what overlays are mapped, and updates GDB's overlay mapping with
3301 In this simple implementation, the target data structures are as follows:
3302 unsigned _novlys; /# number of overlay sections #/
3303 unsigned _ovly_table[_novlys][4] = {
3304 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3305 {..., ..., ..., ...},
3307 unsigned _novly_regions; /# number of overlay regions #/
3308 unsigned _ovly_region_table[_novly_regions][3] = {
3309 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3312 These functions will attempt to update GDB's mappedness state in the
3313 symbol section table, based on the target's mappedness state.
3315 To do this, we keep a cached copy of the target's _ovly_table, and
3316 attempt to detect when the cached copy is invalidated. The main
3317 entry point is "simple_overlay_update(SECT), which looks up SECT in
3318 the cached table and re-reads only the entry for that section from
3319 the target (whenever possible).
3322 /* Cached, dynamically allocated copies of the target data structures: */
3323 static unsigned (*cache_ovly_table)[4] = 0;
3325 static unsigned (*cache_ovly_region_table)[3] = 0;
3327 static unsigned cache_novlys = 0;
3329 static unsigned cache_novly_regions = 0;
3331 static CORE_ADDR cache_ovly_table_base = 0;
3333 static CORE_ADDR cache_ovly_region_table_base = 0;
3337 VMA, SIZE, LMA, MAPPED
3339 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
3341 /* Throw away the cached copy of _ovly_table */
3343 simple_free_overlay_table (void)
3345 if (cache_ovly_table)
3346 xfree (cache_ovly_table);
3348 cache_ovly_table = NULL;
3349 cache_ovly_table_base = 0;
3353 /* Throw away the cached copy of _ovly_region_table */
3355 simple_free_overlay_region_table (void)
3357 if (cache_ovly_region_table)
3358 xfree (cache_ovly_region_table);
3359 cache_novly_regions = 0;
3360 cache_ovly_region_table = NULL;
3361 cache_ovly_region_table_base = 0;
3365 /* Read an array of ints from the target into a local buffer.
3366 Convert to host order. int LEN is number of ints */
3368 read_target_long_array (CORE_ADDR memaddr, unsigned int *myaddr, int len)
3370 /* FIXME (alloca): Not safe if array is very large. */
3371 char *buf = alloca (len * TARGET_LONG_BYTES);
3374 read_memory (memaddr, buf, len * TARGET_LONG_BYTES);
3375 for (i = 0; i < len; i++)
3376 myaddr[i] = extract_unsigned_integer (TARGET_LONG_BYTES * i + buf,
3380 /* Find and grab a copy of the target _ovly_table
3381 (and _novlys, which is needed for the table's size) */
3383 simple_read_overlay_table (void)
3385 struct minimal_symbol *novlys_msym, *ovly_table_msym;
3387 simple_free_overlay_table ();
3388 novlys_msym = lookup_minimal_symbol ("_novlys", NULL, NULL);
3391 error ("Error reading inferior's overlay table: "
3392 "couldn't find `_novlys' variable\n"
3393 "in inferior. Use `overlay manual' mode.");
3397 ovly_table_msym = lookup_minimal_symbol ("_ovly_table", NULL, NULL);
3398 if (! ovly_table_msym)
3400 error ("Error reading inferior's overlay table: couldn't find "
3401 "`_ovly_table' array\n"
3402 "in inferior. Use `overlay manual' mode.");
3406 cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym), 4);
3408 = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table));
3409 cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (ovly_table_msym);
3410 read_target_long_array (cache_ovly_table_base,
3411 (int *) cache_ovly_table,
3414 return 1; /* SUCCESS */
3418 /* Find and grab a copy of the target _ovly_region_table
3419 (and _novly_regions, which is needed for the table's size) */
3421 simple_read_overlay_region_table (void)
3423 struct minimal_symbol *msym;
3425 simple_free_overlay_region_table ();
3426 msym = lookup_minimal_symbol ("_novly_regions", NULL, NULL);
3428 cache_novly_regions = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4);
3430 return 0; /* failure */
3431 cache_ovly_region_table = (void *) xmalloc (cache_novly_regions * 12);
3432 if (cache_ovly_region_table != NULL)
3434 msym = lookup_minimal_symbol ("_ovly_region_table", NULL, NULL);
3437 cache_ovly_region_table_base = SYMBOL_VALUE_ADDRESS (msym);
3438 read_target_long_array (cache_ovly_region_table_base,
3439 (int *) cache_ovly_region_table,
3440 cache_novly_regions * 3);
3443 return 0; /* failure */
3446 return 0; /* failure */
3447 return 1; /* SUCCESS */
3451 /* Function: simple_overlay_update_1
3452 A helper function for simple_overlay_update. Assuming a cached copy
3453 of _ovly_table exists, look through it to find an entry whose vma,
3454 lma and size match those of OSECT. Re-read the entry and make sure
3455 it still matches OSECT (else the table may no longer be valid).
3456 Set OSECT's mapped state to match the entry. Return: 1 for
3457 success, 0 for failure. */
3460 simple_overlay_update_1 (struct obj_section *osect)
3463 bfd *obfd = osect->objfile->obfd;
3464 asection *bsect = osect->the_bfd_section;
3466 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
3467 for (i = 0; i < cache_novlys; i++)
3468 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3469 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3470 /* && cache_ovly_table[i][SIZE] == size */ )
3472 read_target_long_array (cache_ovly_table_base + i * TARGET_LONG_BYTES,
3473 (int *) cache_ovly_table[i], 4);
3474 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3475 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3476 /* && cache_ovly_table[i][SIZE] == size */ )
3478 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3481 else /* Warning! Warning! Target's ovly table has changed! */
3487 /* Function: simple_overlay_update
3488 If OSECT is NULL, then update all sections' mapped state
3489 (after re-reading the entire target _ovly_table).
3490 If OSECT is non-NULL, then try to find a matching entry in the
3491 cached ovly_table and update only OSECT's mapped state.
3492 If a cached entry can't be found or the cache isn't valid, then
3493 re-read the entire cache, and go ahead and update all sections. */
3496 simple_overlay_update (struct obj_section *osect)
3498 struct objfile *objfile;
3500 /* Were we given an osect to look up? NULL means do all of them. */
3502 /* Have we got a cached copy of the target's overlay table? */
3503 if (cache_ovly_table != NULL)
3504 /* Does its cached location match what's currently in the symtab? */
3505 if (cache_ovly_table_base ==
3506 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL, NULL)))
3507 /* Then go ahead and try to look up this single section in the cache */
3508 if (simple_overlay_update_1 (osect))
3509 /* Found it! We're done. */
3512 /* Cached table no good: need to read the entire table anew.
3513 Or else we want all the sections, in which case it's actually
3514 more efficient to read the whole table in one block anyway. */
3516 if (! simple_read_overlay_table ())
3519 /* Now may as well update all sections, even if only one was requested. */
3520 ALL_OBJSECTIONS (objfile, osect)
3521 if (section_is_overlay (osect->the_bfd_section))
3524 bfd *obfd = osect->objfile->obfd;
3525 asection *bsect = osect->the_bfd_section;
3527 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
3528 for (i = 0; i < cache_novlys; i++)
3529 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3530 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3531 /* && cache_ovly_table[i][SIZE] == size */ )
3532 { /* obj_section matches i'th entry in ovly_table */
3533 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3534 break; /* finished with inner for loop: break out */
3539 /* Set the output sections and output offsets for section SECTP in
3540 ABFD. The relocation code in BFD will read these offsets, so we
3541 need to be sure they're initialized. We map each section to itself,
3542 with no offset; this means that SECTP->vma will be honored. */
3545 symfile_dummy_outputs (bfd *abfd, asection *sectp, void *dummy)
3547 sectp->output_section = sectp;
3548 sectp->output_offset = 0;
3551 /* Relocate the contents of a debug section SECTP in ABFD. The
3552 contents are stored in BUF if it is non-NULL, or returned in a
3553 malloc'd buffer otherwise.
3555 For some platforms and debug info formats, shared libraries contain
3556 relocations against the debug sections (particularly for DWARF-2;
3557 one affected platform is PowerPC GNU/Linux, although it depends on
3558 the version of the linker in use). Also, ELF object files naturally
3559 have unresolved relocations for their debug sections. We need to apply
3560 the relocations in order to get the locations of symbols correct. */
3563 symfile_relocate_debug_section (bfd *abfd, asection *sectp, bfd_byte *buf)
3565 /* We're only interested in debugging sections with relocation
3567 if ((sectp->flags & SEC_RELOC) == 0)
3569 if ((sectp->flags & SEC_DEBUGGING) == 0)
3572 /* We will handle section offsets properly elsewhere, so relocate as if
3573 all sections begin at 0. */
3574 bfd_map_over_sections (abfd, symfile_dummy_outputs, NULL);
3576 return bfd_simple_get_relocated_section_contents (abfd, sectp, buf, NULL);
3580 _initialize_symfile (void)
3582 struct cmd_list_element *c;
3584 c = add_cmd ("symbol-file", class_files, symbol_file_command,
3585 "Load symbol table from executable file FILE.\n\
3586 The `file' command can also load symbol tables, as well as setting the file\n\
3587 to execute.", &cmdlist);
3588 set_cmd_completer (c, filename_completer);
3590 c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command,
3591 "Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3592 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3593 ADDR is the starting address of the file's text.\n\
3594 The optional arguments are section-name section-address pairs and\n\
3595 should be specified if the data and bss segments are not contiguous\n\
3596 with the text. SECT is a section name to be loaded at SECT_ADDR.",
3598 set_cmd_completer (c, filename_completer);
3600 c = add_cmd ("add-shared-symbol-files", class_files,
3601 add_shared_symbol_files_command,
3602 "Load the symbols from shared objects in the dynamic linker's link map.",
3604 c = add_alias_cmd ("assf", "add-shared-symbol-files", class_files, 1,
3607 c = add_cmd ("load", class_files, load_command,
3608 "Dynamically load FILE into the running program, and record its symbols\n\
3609 for access from GDB.", &cmdlist);
3610 set_cmd_completer (c, filename_completer);
3613 (add_set_cmd ("symbol-reloading", class_support, var_boolean,
3614 (char *) &symbol_reloading,
3615 "Set dynamic symbol table reloading multiple times in one run.",
3619 add_prefix_cmd ("overlay", class_support, overlay_command,
3620 "Commands for debugging overlays.", &overlaylist,
3621 "overlay ", 0, &cmdlist);
3623 add_com_alias ("ovly", "overlay", class_alias, 1);
3624 add_com_alias ("ov", "overlay", class_alias, 1);
3626 add_cmd ("map-overlay", class_support, map_overlay_command,
3627 "Assert that an overlay section is mapped.", &overlaylist);
3629 add_cmd ("unmap-overlay", class_support, unmap_overlay_command,
3630 "Assert that an overlay section is unmapped.", &overlaylist);
3632 add_cmd ("list-overlays", class_support, list_overlays_command,
3633 "List mappings of overlay sections.", &overlaylist);
3635 add_cmd ("manual", class_support, overlay_manual_command,
3636 "Enable overlay debugging.", &overlaylist);
3637 add_cmd ("off", class_support, overlay_off_command,
3638 "Disable overlay debugging.", &overlaylist);
3639 add_cmd ("auto", class_support, overlay_auto_command,
3640 "Enable automatic overlay debugging.", &overlaylist);
3641 add_cmd ("load-target", class_support, overlay_load_command,
3642 "Read the overlay mapping state from the target.", &overlaylist);
3644 /* Filename extension to source language lookup table: */
3645 init_filename_language_table ();
3646 c = add_set_cmd ("extension-language", class_files, var_string_noescape,
3648 "Set mapping between filename extension and source language.\n\
3649 Usage: set extension-language .foo bar",
3651 set_cmd_cfunc (c, set_ext_lang_command);
3653 add_info ("extensions", info_ext_lang_command,
3654 "All filename extensions associated with a source language.");
3657 (add_set_cmd ("download-write-size", class_obscure,
3658 var_integer, (char *) &download_write_size,
3659 "Set the write size used when downloading a program.\n"
3660 "Only used when downloading a program onto a remote\n"
3661 "target. Specify zero, or a negative value, to disable\n"
3662 "blocked writes. The actual size of each transfer is also\n"
3663 "limited by the size of the target packet and the memory\n"
3668 debug_file_directory = xstrdup (DEBUGDIR);
3670 ("debug-file-directory", class_support, var_string,
3671 (char *) &debug_file_directory,
3672 "Set the directory where separate debug symbols are searched for.\n"
3673 "Separate debug symbols are first searched for in the same\n"
3674 "directory as the binary, then in the `" DEBUG_SUBDIRECTORY
3676 "and lastly at the path of the directory of the binary with\n"
3677 "the global debug-file directory prepended\n",
3679 add_show_from_set (c, &showlist);
3680 set_cmd_completer (c, filename_completer);