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. */
36 #include "breakpoint.h"
38 #include "complaints.h"
40 #include "inferior.h" /* for write_pc */
41 #include "filenames.h" /* for DOSish file names */
42 #include "gdb-stabs.h"
43 #include "gdb_obstack.h"
44 #include "completer.h"
46 #include <readline/readline.h>
47 #include "gdb_assert.h"
49 #include <sys/types.h>
51 #include "gdb_string.h"
62 /* Some HP-UX related globals to clear when a new "main"
63 symbol file is loaded. HP-specific. */
65 extern int hp_som_som_object_present;
66 extern int hp_cxx_exception_support_initialized;
67 #define RESET_HP_UX_GLOBALS() do {\
68 hp_som_som_object_present = 0; /* indicates HP-compiled code */ \
69 hp_cxx_exception_support_initialized = 0; /* must reinitialize exception stuff */ \
73 int (*ui_load_progress_hook) (const char *section, unsigned long num);
74 void (*show_load_progress) (const char *section,
75 unsigned long section_sent,
76 unsigned long section_size,
77 unsigned long total_sent,
78 unsigned long total_size);
79 void (*pre_add_symbol_hook) (char *);
80 void (*post_add_symbol_hook) (void);
81 void (*target_new_objfile_hook) (struct objfile *);
83 static void clear_symtab_users_cleanup (void *ignore);
85 /* Global variables owned by this file */
86 int readnow_symbol_files; /* Read full symbols immediately */
88 /* External variables and functions referenced. */
90 extern void report_transfer_performance (unsigned long, time_t, time_t);
92 /* Functions this file defines */
95 static int simple_read_overlay_region_table (void);
96 static void simple_free_overlay_region_table (void);
99 static void set_initial_language (void);
101 static void load_command (char *, int);
103 static void symbol_file_add_main_1 (char *args, int from_tty, int flags);
105 static void add_symbol_file_command (char *, int);
107 static void add_shared_symbol_files_command (char *, int);
109 static void reread_separate_symbols (struct objfile *objfile);
111 static void cashier_psymtab (struct partial_symtab *);
113 bfd *symfile_bfd_open (char *);
115 int get_section_index (struct objfile *, char *);
117 static void find_sym_fns (struct objfile *);
119 static void decrement_reading_symtab (void *);
121 static void overlay_invalidate_all (void);
123 static int overlay_is_mapped (struct obj_section *);
125 void list_overlays_command (char *, int);
127 void map_overlay_command (char *, int);
129 void unmap_overlay_command (char *, int);
131 static void overlay_auto_command (char *, int);
133 static void overlay_manual_command (char *, int);
135 static void overlay_off_command (char *, int);
137 static void overlay_load_command (char *, int);
139 static void overlay_command (char *, int);
141 static void simple_free_overlay_table (void);
143 static void read_target_long_array (CORE_ADDR, unsigned int *, int);
145 static int simple_read_overlay_table (void);
147 static int simple_overlay_update_1 (struct obj_section *);
149 static void add_filename_language (char *ext, enum language lang);
151 static void set_ext_lang_command (char *args, int from_tty);
153 static void info_ext_lang_command (char *args, int from_tty);
155 static char *find_separate_debug_file (struct objfile *objfile);
157 static void init_filename_language_table (void);
159 void _initialize_symfile (void);
161 /* List of all available sym_fns. On gdb startup, each object file reader
162 calls add_symtab_fns() to register information on each format it is
165 static struct sym_fns *symtab_fns = NULL;
167 /* Flag for whether user will be reloading symbols multiple times.
168 Defaults to ON for VxWorks, otherwise OFF. */
170 #ifdef SYMBOL_RELOADING_DEFAULT
171 int symbol_reloading = SYMBOL_RELOADING_DEFAULT;
173 int symbol_reloading = 0;
176 /* If non-zero, shared library symbols will be added automatically
177 when the inferior is created, new libraries are loaded, or when
178 attaching to the inferior. This is almost always what users will
179 want to have happen; but for very large programs, the startup time
180 will be excessive, and so if this is a problem, the user can clear
181 this flag and then add the shared library symbols as needed. Note
182 that there is a potential for confusion, since if the shared
183 library symbols are not loaded, commands like "info fun" will *not*
184 report all the functions that are actually present. */
186 int auto_solib_add = 1;
188 /* For systems that support it, a threshold size in megabytes. If
189 automatically adding a new library's symbol table to those already
190 known to the debugger would cause the total shared library symbol
191 size to exceed this threshhold, then the shlib's symbols are not
192 added. The threshold is ignored if the user explicitly asks for a
193 shlib to be added, such as when using the "sharedlibrary"
196 int auto_solib_limit;
199 /* Since this function is called from within qsort, in an ANSI environment
200 it must conform to the prototype for qsort, which specifies that the
201 comparison function takes two "void *" pointers. */
204 compare_symbols (const void *s1p, const void *s2p)
206 register struct symbol **s1, **s2;
208 s1 = (struct symbol **) s1p;
209 s2 = (struct symbol **) s2p;
210 return (strcmp (SYMBOL_SOURCE_NAME (*s1), SYMBOL_SOURCE_NAME (*s2)));
217 compare_psymbols -- compare two partial symbols by name
221 Given pointers to pointers to two partial symbol table entries,
222 compare them by name and return -N, 0, or +N (ala strcmp).
223 Typically used by sorting routines like qsort().
227 Does direct compare of first two characters before punting
228 and passing to strcmp for longer compares. Note that the
229 original version had a bug whereby two null strings or two
230 identically named one character strings would return the
231 comparison of memory following the null byte.
236 compare_psymbols (const void *s1p, const void *s2p)
238 register struct partial_symbol **s1, **s2;
239 register char *st1, *st2;
241 s1 = (struct partial_symbol **) s1p;
242 s2 = (struct partial_symbol **) s2p;
243 st1 = SYMBOL_SOURCE_NAME (*s1);
244 st2 = SYMBOL_SOURCE_NAME (*s2);
247 if ((st1[0] - st2[0]) || !st1[0])
249 return (st1[0] - st2[0]);
251 else if ((st1[1] - st2[1]) || !st1[1])
253 return (st1[1] - st2[1]);
257 return (strcmp (st1, st2));
262 sort_pst_symbols (struct partial_symtab *pst)
264 /* Sort the global list; don't sort the static list */
266 qsort (pst->objfile->global_psymbols.list + pst->globals_offset,
267 pst->n_global_syms, sizeof (struct partial_symbol *),
271 /* Call sort_block_syms to sort alphabetically the symbols of one block. */
274 sort_block_syms (register struct block *b)
276 qsort (&BLOCK_SYM (b, 0), BLOCK_NSYMS (b),
277 sizeof (struct symbol *), compare_symbols);
280 /* Call sort_symtab_syms to sort alphabetically
281 the symbols of each block of one symtab. */
284 sort_symtab_syms (register struct symtab *s)
286 register struct blockvector *bv;
289 register struct block *b;
293 bv = BLOCKVECTOR (s);
294 nbl = BLOCKVECTOR_NBLOCKS (bv);
295 for (i = 0; i < nbl; i++)
297 b = BLOCKVECTOR_BLOCK (bv, i);
298 if (BLOCK_SHOULD_SORT (b))
303 /* Make a null terminated copy of the string at PTR with SIZE characters in
304 the obstack pointed to by OBSTACKP . Returns the address of the copy.
305 Note that the string at PTR does not have to be null terminated, I.E. it
306 may be part of a larger string and we are only saving a substring. */
309 obsavestring (const char *ptr, int size, struct obstack *obstackp)
311 register char *p = (char *) obstack_alloc (obstackp, size + 1);
312 /* Open-coded memcpy--saves function call time. These strings are usually
313 short. FIXME: Is this really still true with a compiler that can
316 register const char *p1 = ptr;
317 register char *p2 = p;
318 const char *end = ptr + size;
326 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
327 in the obstack pointed to by OBSTACKP. */
330 obconcat (struct obstack *obstackp, const char *s1, const char *s2,
333 register int len = strlen (s1) + strlen (s2) + strlen (s3) + 1;
334 register char *val = (char *) obstack_alloc (obstackp, len);
341 /* True if we are nested inside psymtab_to_symtab. */
343 int currently_reading_symtab = 0;
346 decrement_reading_symtab (void *dummy)
348 currently_reading_symtab--;
351 /* Get the symbol table that corresponds to a partial_symtab.
352 This is fast after the first time you do it. In fact, there
353 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
357 psymtab_to_symtab (register struct partial_symtab *pst)
359 /* If it's been looked up before, return it. */
363 /* If it has not yet been read in, read it. */
366 struct cleanup *back_to = make_cleanup (decrement_reading_symtab, NULL);
367 currently_reading_symtab++;
368 (*pst->read_symtab) (pst);
369 do_cleanups (back_to);
375 /* Initialize entry point information for this objfile. */
378 init_entry_point_info (struct objfile *objfile)
380 /* Save startup file's range of PC addresses to help blockframe.c
381 decide where the bottom of the stack is. */
383 if (bfd_get_file_flags (objfile->obfd) & EXEC_P)
385 /* Executable file -- record its entry point so we'll recognize
386 the startup file because it contains the entry point. */
387 objfile->ei.entry_point = bfd_get_start_address (objfile->obfd);
391 /* Examination of non-executable.o files. Short-circuit this stuff. */
392 objfile->ei.entry_point = INVALID_ENTRY_POINT;
394 objfile->ei.entry_file_lowpc = INVALID_ENTRY_LOWPC;
395 objfile->ei.entry_file_highpc = INVALID_ENTRY_HIGHPC;
396 objfile->ei.entry_func_lowpc = INVALID_ENTRY_LOWPC;
397 objfile->ei.entry_func_highpc = INVALID_ENTRY_HIGHPC;
398 objfile->ei.main_func_lowpc = INVALID_ENTRY_LOWPC;
399 objfile->ei.main_func_highpc = INVALID_ENTRY_HIGHPC;
402 /* Get current entry point address. */
405 entry_point_address (void)
407 return symfile_objfile ? symfile_objfile->ei.entry_point : 0;
410 /* Remember the lowest-addressed loadable section we've seen.
411 This function is called via bfd_map_over_sections.
413 In case of equal vmas, the section with the largest size becomes the
414 lowest-addressed loadable section.
416 If the vmas and sizes are equal, the last section is considered the
417 lowest-addressed loadable section. */
420 find_lowest_section (bfd *abfd, asection *sect, void *obj)
422 asection **lowest = (asection **) obj;
424 if (0 == (bfd_get_section_flags (abfd, sect) & SEC_LOAD))
427 *lowest = sect; /* First loadable section */
428 else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect))
429 *lowest = sect; /* A lower loadable section */
430 else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect)
431 && (bfd_section_size (abfd, (*lowest))
432 <= bfd_section_size (abfd, sect)))
437 /* Build (allocate and populate) a section_addr_info struct from
438 an existing section table. */
440 extern struct section_addr_info *
441 build_section_addr_info_from_section_table (const struct section_table *start,
442 const struct section_table *end)
444 struct section_addr_info *sap;
445 const struct section_table *stp;
448 sap = xmalloc (sizeof (struct section_addr_info));
449 memset (sap, 0, sizeof (struct section_addr_info));
451 for (stp = start, oidx = 0; stp != end; stp++)
453 if (bfd_get_section_flags (stp->bfd,
454 stp->the_bfd_section) & (SEC_ALLOC | SEC_LOAD)
455 && oidx < MAX_SECTIONS)
457 sap->other[oidx].addr = stp->addr;
458 sap->other[oidx].name
459 = xstrdup (bfd_section_name (stp->bfd, stp->the_bfd_section));
460 sap->other[oidx].sectindex = stp->the_bfd_section->index;
469 /* Free all memory allocated by build_section_addr_info_from_section_table. */
472 free_section_addr_info (struct section_addr_info *sap)
476 for (idx = 0; idx < MAX_SECTIONS; idx++)
477 if (sap->other[idx].name)
478 xfree (sap->other[idx].name);
483 /* Initialize OBJFILE's sect_index_* members. */
485 init_objfile_sect_indices (struct objfile *objfile)
490 sect = bfd_get_section_by_name (objfile->obfd, ".text");
492 objfile->sect_index_text = sect->index;
494 sect = bfd_get_section_by_name (objfile->obfd, ".data");
496 objfile->sect_index_data = sect->index;
498 sect = bfd_get_section_by_name (objfile->obfd, ".bss");
500 objfile->sect_index_bss = sect->index;
502 sect = bfd_get_section_by_name (objfile->obfd, ".rodata");
504 objfile->sect_index_rodata = sect->index;
506 /* This is where things get really weird... We MUST have valid
507 indices for the various sect_index_* members or gdb will abort.
508 So if for example, there is no ".text" section, we have to
509 accomodate that. Except when explicitly adding symbol files at
510 some address, section_offsets contains nothing but zeros, so it
511 doesn't matter which slot in section_offsets the individual
512 sect_index_* members index into. So if they are all zero, it is
513 safe to just point all the currently uninitialized indices to the
516 for (i = 0; i < objfile->num_sections; i++)
518 if (ANOFFSET (objfile->section_offsets, i) != 0)
523 if (i == objfile->num_sections)
525 if (objfile->sect_index_text == -1)
526 objfile->sect_index_text = 0;
527 if (objfile->sect_index_data == -1)
528 objfile->sect_index_data = 0;
529 if (objfile->sect_index_bss == -1)
530 objfile->sect_index_bss = 0;
531 if (objfile->sect_index_rodata == -1)
532 objfile->sect_index_rodata = 0;
537 /* Parse the user's idea of an offset for dynamic linking, into our idea
538 of how to represent it for fast symbol reading. This is the default
539 version of the sym_fns.sym_offsets function for symbol readers that
540 don't need to do anything special. It allocates a section_offsets table
541 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
544 default_symfile_offsets (struct objfile *objfile,
545 struct section_addr_info *addrs)
549 objfile->num_sections = SECT_OFF_MAX;
550 objfile->section_offsets = (struct section_offsets *)
551 obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS);
552 memset (objfile->section_offsets, 0, SIZEOF_SECTION_OFFSETS);
554 /* Now calculate offsets for section that were specified by the
556 for (i = 0; i < MAX_SECTIONS && addrs->other[i].name; i++)
558 struct other_sections *osp ;
560 osp = &addrs->other[i] ;
564 /* Record all sections in offsets */
565 /* The section_offsets in the objfile are here filled in using
567 (objfile->section_offsets)->offsets[osp->sectindex] = osp->addr;
570 /* Remember the bfd indexes for the .text, .data, .bss and
572 init_objfile_sect_indices (objfile);
576 /* Process a symbol file, as either the main file or as a dynamically
579 OBJFILE is where the symbols are to be read from.
581 ADDRS is the list of section load addresses. If the user has given
582 an 'add-symbol-file' command, then this is the list of offsets and
583 addresses he or she provided as arguments to the command; or, if
584 we're handling a shared library, these are the actual addresses the
585 sections are loaded at, according to the inferior's dynamic linker
586 (as gleaned by GDB's shared library code). We convert each address
587 into an offset from the section VMA's as it appears in the object
588 file, and then call the file's sym_offsets function to convert this
589 into a format-specific offset table --- a `struct section_offsets'.
590 If ADDRS is non-zero, OFFSETS must be zero.
592 OFFSETS is a table of section offsets already in the right
593 format-specific representation. NUM_OFFSETS is the number of
594 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
595 assume this is the proper table the call to sym_offsets described
596 above would produce. Instead of calling sym_offsets, we just dump
597 it right into objfile->section_offsets. (When we're re-reading
598 symbols from an objfile, we don't have the original load address
599 list any more; all we have is the section offset table.) If
600 OFFSETS is non-zero, ADDRS must be zero.
602 MAINLINE is nonzero if this is the main symbol file, or zero if
603 it's an extra symbol file such as dynamically loaded code.
605 VERBO is nonzero if the caller has printed a verbose message about
606 the symbol reading (and complaints can be more terse about it). */
609 syms_from_objfile (struct objfile *objfile,
610 struct section_addr_info *addrs,
611 struct section_offsets *offsets,
616 asection *lower_sect;
618 CORE_ADDR lower_offset;
619 struct section_addr_info local_addr;
620 struct cleanup *old_chain;
623 gdb_assert (! (addrs && offsets));
625 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
626 list. We now establish the convention that an addr of zero means
627 no load address was specified. */
628 if (! addrs && ! offsets)
630 memset (&local_addr, 0, sizeof (local_addr));
634 /* Now either addrs or offsets is non-zero. */
636 init_entry_point_info (objfile);
637 find_sym_fns (objfile);
639 if (objfile->sf == NULL)
640 return; /* No symbols. */
642 /* Make sure that partially constructed symbol tables will be cleaned up
643 if an error occurs during symbol reading. */
644 old_chain = make_cleanup_free_objfile (objfile);
648 /* We will modify the main symbol table, make sure that all its users
649 will be cleaned up if an error occurs during symbol reading. */
650 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
652 /* Since no error yet, throw away the old symbol table. */
654 if (symfile_objfile != NULL)
656 free_objfile (symfile_objfile);
657 symfile_objfile = NULL;
660 /* Currently we keep symbols from the add-symbol-file command.
661 If the user wants to get rid of them, they should do "symbol-file"
662 without arguments first. Not sure this is the best behavior
665 (*objfile->sf->sym_new_init) (objfile);
668 /* Convert addr into an offset rather than an absolute address.
669 We find the lowest address of a loaded segment in the objfile,
670 and assume that <addr> is where that got loaded.
672 We no longer warn if the lowest section is not a text segment (as
673 happens for the PA64 port. */
676 /* Find lowest loadable section to be used as starting point for
677 continguous sections. FIXME!! won't work without call to find
678 .text first, but this assumes text is lowest section. */
679 lower_sect = bfd_get_section_by_name (objfile->obfd, ".text");
680 if (lower_sect == NULL)
681 bfd_map_over_sections (objfile->obfd, find_lowest_section,
683 if (lower_sect == NULL)
684 warning ("no loadable sections found in added symbol-file %s",
687 if ((bfd_get_section_flags (objfile->obfd, lower_sect) & SEC_CODE) == 0)
688 warning ("Lowest section in %s is %s at %s",
690 bfd_section_name (objfile->obfd, lower_sect),
691 paddr (bfd_section_vma (objfile->obfd, lower_sect)));
692 if (lower_sect != NULL)
693 lower_offset = bfd_section_vma (objfile->obfd, lower_sect);
697 /* Calculate offsets for the loadable sections.
698 FIXME! Sections must be in order of increasing loadable section
699 so that contiguous sections can use the lower-offset!!!
701 Adjust offsets if the segments are not contiguous.
702 If the section is contiguous, its offset should be set to
703 the offset of the highest loadable section lower than it
704 (the loadable section directly below it in memory).
705 this_offset = lower_offset = lower_addr - lower_orig_addr */
707 /* Calculate offsets for sections. */
709 for (i=0 ; i < MAX_SECTIONS && addrs->other[i].name; i++)
711 if (addrs->other[i].addr != 0)
713 sect = bfd_get_section_by_name (objfile->obfd,
714 addrs->other[i].name);
718 -= bfd_section_vma (objfile->obfd, sect);
719 lower_offset = addrs->other[i].addr;
720 /* This is the index used by BFD. */
721 addrs->other[i].sectindex = sect->index ;
725 warning ("section %s not found in %s",
726 addrs->other[i].name,
728 addrs->other[i].addr = 0;
732 addrs->other[i].addr = lower_offset;
736 /* Initialize symbol reading routines for this objfile, allow complaints to
737 appear for this new file, and record how verbose to be, then do the
738 initial symbol reading for this file. */
740 (*objfile->sf->sym_init) (objfile);
741 clear_complaints (&symfile_complaints, 1, verbo);
744 (*objfile->sf->sym_offsets) (objfile, addrs);
747 size_t size = SIZEOF_N_SECTION_OFFSETS (num_offsets);
749 /* Just copy in the offset table directly as given to us. */
750 objfile->num_sections = num_offsets;
751 objfile->section_offsets
752 = ((struct section_offsets *)
753 obstack_alloc (&objfile->psymbol_obstack, size));
754 memcpy (objfile->section_offsets, offsets, size);
756 init_objfile_sect_indices (objfile);
759 #ifndef IBM6000_TARGET
760 /* This is a SVR4/SunOS specific hack, I think. In any event, it
761 screws RS/6000. sym_offsets should be doing this sort of thing,
762 because it knows the mapping between bfd sections and
764 /* This is a hack. As far as I can tell, section offsets are not
765 target dependent. They are all set to addr with a couple of
766 exceptions. The exceptions are sysvr4 shared libraries, whose
767 offsets are kept in solib structures anyway and rs6000 xcoff
768 which handles shared libraries in a completely unique way.
770 Section offsets are built similarly, except that they are built
771 by adding addr in all cases because there is no clear mapping
772 from section_offsets into actual sections. Note that solib.c
773 has a different algorithm for finding section offsets.
775 These should probably all be collapsed into some target
776 independent form of shared library support. FIXME. */
780 struct obj_section *s;
782 /* Map section offsets in "addr" back to the object's
783 sections by comparing the section names with bfd's
784 section names. Then adjust the section address by
785 the offset. */ /* for gdb/13815 */
787 ALL_OBJFILE_OSECTIONS (objfile, s)
789 CORE_ADDR s_addr = 0;
793 !s_addr && i < MAX_SECTIONS && addrs->other[i].name;
795 if (strcmp (bfd_section_name (s->objfile->obfd,
797 addrs->other[i].name) == 0)
798 s_addr = addrs->other[i].addr; /* end added for gdb/13815 */
800 s->addr -= s->offset;
802 s->endaddr -= s->offset;
803 s->endaddr += s_addr;
807 #endif /* not IBM6000_TARGET */
809 (*objfile->sf->sym_read) (objfile, mainline);
811 if (!have_partial_symbols () && !have_full_symbols ())
814 printf_filtered ("(no debugging symbols found)...");
818 /* Don't allow char * to have a typename (else would get caddr_t).
819 Ditto void *. FIXME: Check whether this is now done by all the
820 symbol readers themselves (many of them now do), and if so remove
823 TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0;
824 TYPE_NAME (lookup_pointer_type (builtin_type_void)) = 0;
826 /* Mark the objfile has having had initial symbol read attempted. Note
827 that this does not mean we found any symbols... */
829 objfile->flags |= OBJF_SYMS;
831 /* Discard cleanups as symbol reading was successful. */
833 discard_cleanups (old_chain);
835 /* Call this after reading in a new symbol table to give target
836 dependent code a crack at the new symbols. For instance, this
837 could be used to update the values of target-specific symbols GDB
838 needs to keep track of (such as _sigtramp, or whatever). */
840 TARGET_SYMFILE_POSTREAD (objfile);
843 /* Perform required actions after either reading in the initial
844 symbols for a new objfile, or mapping in the symbols from a reusable
848 new_symfile_objfile (struct objfile *objfile, int mainline, int verbo)
851 /* If this is the main symbol file we have to clean up all users of the
852 old main symbol file. Otherwise it is sufficient to fixup all the
853 breakpoints that may have been redefined by this symbol file. */
856 /* OK, make it the "real" symbol file. */
857 symfile_objfile = objfile;
859 clear_symtab_users ();
863 breakpoint_re_set ();
866 /* We're done reading the symbol file; finish off complaints. */
867 clear_complaints (&symfile_complaints, 0, verbo);
870 /* Process a symbol file, as either the main file or as a dynamically
873 NAME is the file name (which will be tilde-expanded and made
874 absolute herein) (but we don't free or modify NAME itself).
876 FROM_TTY says how verbose to be.
878 MAINLINE specifies whether this is the main symbol file, or whether
879 it's an extra symbol file such as dynamically loaded code.
881 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
882 syms_from_objfile, above. ADDRS is ignored when MAINLINE is
885 Upon success, returns a pointer to the objfile that was added.
886 Upon failure, jumps back to command level (never returns). */
887 static struct objfile *
888 symbol_file_add_with_addrs_or_offsets (char *name, int from_tty,
889 struct section_addr_info *addrs,
890 struct section_offsets *offsets,
892 int mainline, int flags)
894 struct objfile *objfile;
895 struct partial_symtab *psymtab;
898 struct section_addr_info orig_addrs;
903 /* Open a bfd for the file, and give user a chance to burp if we'd be
904 interactively wiping out any existing symbols. */
906 abfd = symfile_bfd_open (name);
908 if ((have_full_symbols () || have_partial_symbols ())
911 && !query ("Load new symbol table from \"%s\"? ", name))
912 error ("Not confirmed.");
914 objfile = allocate_objfile (abfd, flags);
916 /* If the objfile uses a mapped symbol file, and we have a psymtab for
917 it, then skip reading any symbols at this time. */
919 if ((objfile->flags & OBJF_MAPPED) && (objfile->flags & OBJF_SYMS))
921 /* We mapped in an existing symbol table file that already has had
922 initial symbol reading performed, so we can skip that part. Notify
923 the user that instead of reading the symbols, they have been mapped.
925 if (from_tty || info_verbose)
927 printf_filtered ("Mapped symbols for %s...", name);
929 gdb_flush (gdb_stdout);
931 init_entry_point_info (objfile);
932 find_sym_fns (objfile);
936 /* We either created a new mapped symbol table, mapped an existing
937 symbol table file which has not had initial symbol reading
938 performed, or need to read an unmapped symbol table. */
939 if (from_tty || info_verbose)
941 if (pre_add_symbol_hook)
942 pre_add_symbol_hook (name);
945 printf_filtered ("Reading symbols from %s...", name);
947 gdb_flush (gdb_stdout);
950 syms_from_objfile (objfile, addrs, offsets, num_offsets,
954 /* We now have at least a partial symbol table. Check to see if the
955 user requested that all symbols be read on initial access via either
956 the gdb startup command line or on a per symbol file basis. Expand
957 all partial symbol tables for this objfile if so. */
959 if ((flags & OBJF_READNOW) || readnow_symbol_files)
961 if (from_tty || info_verbose)
963 printf_filtered ("expanding to full symbols...");
965 gdb_flush (gdb_stdout);
968 for (psymtab = objfile->psymtabs;
970 psymtab = psymtab->next)
972 psymtab_to_symtab (psymtab);
976 debugfile = find_separate_debug_file (objfile);
979 if (from_tty || info_verbose)
981 printf_filtered ("loading separate debug info from '%s'",
984 gdb_flush (gdb_stdout);
989 objfile->separate_debug_objfile
990 = symbol_file_add (debugfile, from_tty, &orig_addrs, 0, flags);
994 objfile->separate_debug_objfile
995 = symbol_file_add (debugfile, from_tty, NULL, 0, flags);
997 objfile->separate_debug_objfile->separate_debug_objfile_backlink
1000 /* Put the separate debug object before the normal one, this is so that
1001 usage of the ALL_OBJFILES_SAFE macro will stay safe. */
1002 put_objfile_before (objfile->separate_debug_objfile, objfile);
1007 if (from_tty || info_verbose)
1009 if (post_add_symbol_hook)
1010 post_add_symbol_hook ();
1013 printf_filtered ("done.\n");
1017 /* We print some messages regardless of whether 'from_tty ||
1018 info_verbose' is true, so make sure they go out at the right
1020 gdb_flush (gdb_stdout);
1022 if (objfile->sf == NULL)
1023 return objfile; /* No symbols. */
1025 new_symfile_objfile (objfile, mainline, from_tty);
1027 if (target_new_objfile_hook)
1028 target_new_objfile_hook (objfile);
1034 /* Process a symbol file, as either the main file or as a dynamically
1035 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
1038 symbol_file_add (char *name, int from_tty, struct section_addr_info *addrs,
1039 int mainline, int flags)
1041 return symbol_file_add_with_addrs_or_offsets (name, from_tty, addrs, 0, 0,
1046 /* Call symbol_file_add() with default values and update whatever is
1047 affected by the loading of a new main().
1048 Used when the file is supplied in the gdb command line
1049 and by some targets with special loading requirements.
1050 The auxiliary function, symbol_file_add_main_1(), has the flags
1051 argument for the switches that can only be specified in the symbol_file
1055 symbol_file_add_main (char *args, int from_tty)
1057 symbol_file_add_main_1 (args, from_tty, 0);
1061 symbol_file_add_main_1 (char *args, int from_tty, int flags)
1063 symbol_file_add (args, from_tty, NULL, 1, flags);
1066 RESET_HP_UX_GLOBALS ();
1069 /* Getting new symbols may change our opinion about
1070 what is frameless. */
1071 reinit_frame_cache ();
1073 set_initial_language ();
1077 symbol_file_clear (int from_tty)
1079 if ((have_full_symbols () || have_partial_symbols ())
1081 && !query ("Discard symbol table from `%s'? ",
1082 symfile_objfile->name))
1083 error ("Not confirmed.");
1084 free_all_objfiles ();
1086 /* solib descriptors may have handles to objfiles. Since their
1087 storage has just been released, we'd better wipe the solib
1088 descriptors as well.
1090 #if defined(SOLIB_RESTART)
1094 symfile_objfile = NULL;
1096 printf_unfiltered ("No symbol file now.\n");
1098 RESET_HP_UX_GLOBALS ();
1103 get_debug_link_info (struct objfile *objfile, unsigned long *crc32_out)
1106 bfd_size_type debuglink_size;
1107 unsigned long crc32;
1112 sect = bfd_get_section_by_name (objfile->obfd, ".gnu_debuglink");
1117 debuglink_size = bfd_section_size (objfile->obfd, sect);
1119 contents = xmalloc (debuglink_size);
1120 bfd_get_section_contents (objfile->obfd, sect, contents,
1121 (file_ptr)0, (bfd_size_type)debuglink_size);
1123 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1124 crc_offset = strlen (contents) + 1;
1125 crc_offset = (crc_offset + 3) & ~3;
1127 crc32 = bfd_get_32 (objfile->obfd, (bfd_byte *) (contents + crc_offset));
1134 separate_debug_file_exists (const char *name, unsigned long crc)
1136 unsigned long file_crc = 0;
1138 char buffer[8*1024];
1141 fd = open (name, O_RDONLY | O_BINARY);
1145 while ((count = read (fd, buffer, sizeof (buffer))) > 0)
1146 file_crc = gnu_debuglink_crc32 (file_crc, buffer, count);
1150 return crc == file_crc;
1153 static char *debug_file_directory = NULL;
1155 #if ! defined (DEBUG_SUBDIRECTORY)
1156 #define DEBUG_SUBDIRECTORY ".debug"
1160 find_separate_debug_file (struct objfile *objfile)
1167 bfd_size_type debuglink_size;
1168 unsigned long crc32;
1171 basename = get_debug_link_info (objfile, &crc32);
1173 if (basename == NULL)
1176 dir = xstrdup (objfile->name);
1178 /* Strip off filename part */
1179 for (i = strlen(dir) - 1; i >= 0; i--)
1181 if (IS_DIR_SEPARATOR (dir[i]))
1186 debugfile = alloca (strlen (debug_file_directory) + 1
1188 + strlen (DEBUG_SUBDIRECTORY)
1193 /* First try in the same directory as the original file. */
1194 strcpy (debugfile, dir);
1195 strcat (debugfile, basename);
1197 if (separate_debug_file_exists (debugfile, crc32))
1201 return xstrdup (debugfile);
1204 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1205 strcpy (debugfile, dir);
1206 strcat (debugfile, DEBUG_SUBDIRECTORY);
1207 strcat (debugfile, "/");
1208 strcat (debugfile, basename);
1210 if (separate_debug_file_exists (debugfile, crc32))
1214 return xstrdup (debugfile);
1217 /* Then try in the global debugfile directory. */
1218 strcpy (debugfile, debug_file_directory);
1219 strcat (debugfile, "/");
1220 strcat (debugfile, dir);
1221 strcat (debugfile, "/");
1222 strcat (debugfile, basename);
1224 if (separate_debug_file_exists (debugfile, crc32))
1228 return xstrdup (debugfile);
1237 /* This is the symbol-file command. Read the file, analyze its
1238 symbols, and add a struct symtab to a symtab list. The syntax of
1239 the command is rather bizarre--(1) buildargv implements various
1240 quoting conventions which are undocumented and have little or
1241 nothing in common with the way things are quoted (or not quoted)
1242 elsewhere in GDB, (2) options are used, which are not generally
1243 used in GDB (perhaps "set mapped on", "set readnow on" would be
1244 better), (3) the order of options matters, which is contrary to GNU
1245 conventions (because it is confusing and inconvenient). */
1246 /* Note: ezannoni 2000-04-17. This function used to have support for
1247 rombug (see remote-os9k.c). It consisted of a call to target_link()
1248 (target.c) to get the address of the text segment from the target,
1249 and pass that to symbol_file_add(). This is no longer supported. */
1252 symbol_file_command (char *args, int from_tty)
1256 struct cleanup *cleanups;
1257 int flags = OBJF_USERLOADED;
1263 symbol_file_clear (from_tty);
1267 if ((argv = buildargv (args)) == NULL)
1271 cleanups = make_cleanup_freeargv (argv);
1272 while (*argv != NULL)
1274 if (STREQ (*argv, "-mapped"))
1275 flags |= OBJF_MAPPED;
1277 if (STREQ (*argv, "-readnow"))
1278 flags |= OBJF_READNOW;
1281 error ("unknown option `%s'", *argv);
1286 symbol_file_add_main_1 (name, from_tty, flags);
1293 error ("no symbol file name was specified");
1295 do_cleanups (cleanups);
1299 /* Set the initial language.
1301 A better solution would be to record the language in the psymtab when reading
1302 partial symbols, and then use it (if known) to set the language. This would
1303 be a win for formats that encode the language in an easily discoverable place,
1304 such as DWARF. For stabs, we can jump through hoops looking for specially
1305 named symbols or try to intuit the language from the specific type of stabs
1306 we find, but we can't do that until later when we read in full symbols.
1310 set_initial_language (void)
1312 struct partial_symtab *pst;
1313 enum language lang = language_unknown;
1315 pst = find_main_psymtab ();
1318 if (pst->filename != NULL)
1320 lang = deduce_language_from_filename (pst->filename);
1322 if (lang == language_unknown)
1324 /* Make C the default language */
1327 set_language (lang);
1328 expected_language = current_language; /* Don't warn the user */
1332 /* Open file specified by NAME and hand it off to BFD for preliminary
1333 analysis. Result is a newly initialized bfd *, which includes a newly
1334 malloc'd` copy of NAME (tilde-expanded and made absolute).
1335 In case of trouble, error() is called. */
1338 symfile_bfd_open (char *name)
1342 char *absolute_name;
1346 name = tilde_expand (name); /* Returns 1st new malloc'd copy */
1348 /* Look down path for it, allocate 2nd new malloc'd copy. */
1349 desc = openp (getenv ("PATH"), 1, name, O_RDONLY | O_BINARY, 0, &absolute_name);
1350 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1353 char *exename = alloca (strlen (name) + 5);
1354 strcat (strcpy (exename, name), ".exe");
1355 desc = openp (getenv ("PATH"), 1, exename, O_RDONLY | O_BINARY,
1361 make_cleanup (xfree, name);
1362 perror_with_name (name);
1364 xfree (name); /* Free 1st new malloc'd copy */
1365 name = absolute_name; /* Keep 2nd malloc'd copy in bfd */
1366 /* It'll be freed in free_objfile(). */
1368 sym_bfd = bfd_fdopenr (name, gnutarget, desc);
1372 make_cleanup (xfree, name);
1373 error ("\"%s\": can't open to read symbols: %s.", name,
1374 bfd_errmsg (bfd_get_error ()));
1376 sym_bfd->cacheable = 1;
1378 if (!bfd_check_format (sym_bfd, bfd_object))
1380 /* FIXME: should be checking for errors from bfd_close (for one thing,
1381 on error it does not free all the storage associated with the
1383 bfd_close (sym_bfd); /* This also closes desc */
1384 make_cleanup (xfree, name);
1385 error ("\"%s\": can't read symbols: %s.", name,
1386 bfd_errmsg (bfd_get_error ()));
1391 /* Return the section index for the given section name. Return -1 if
1392 the section was not found. */
1394 get_section_index (struct objfile *objfile, char *section_name)
1396 asection *sect = bfd_get_section_by_name (objfile->obfd, section_name);
1403 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1404 startup by the _initialize routine in each object file format reader,
1405 to register information about each format the the reader is prepared
1409 add_symtab_fns (struct sym_fns *sf)
1411 sf->next = symtab_fns;
1416 /* Initialize to read symbols from the symbol file sym_bfd. It either
1417 returns or calls error(). The result is an initialized struct sym_fns
1418 in the objfile structure, that contains cached information about the
1422 find_sym_fns (struct objfile *objfile)
1425 enum bfd_flavour our_flavour = bfd_get_flavour (objfile->obfd);
1426 char *our_target = bfd_get_target (objfile->obfd);
1428 if (our_flavour == bfd_target_srec_flavour
1429 || our_flavour == bfd_target_ihex_flavour
1430 || our_flavour == bfd_target_tekhex_flavour)
1431 return; /* No symbols. */
1433 /* Special kludge for apollo. See dstread.c. */
1434 if (STREQN (our_target, "apollo", 6))
1435 our_flavour = (enum bfd_flavour) -2;
1437 for (sf = symtab_fns; sf != NULL; sf = sf->next)
1439 if (our_flavour == sf->sym_flavour)
1445 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
1446 bfd_get_target (objfile->obfd));
1449 /* This function runs the load command of our current target. */
1452 load_command (char *arg, int from_tty)
1455 arg = get_exec_file (1);
1456 target_load (arg, from_tty);
1458 /* After re-loading the executable, we don't really know which
1459 overlays are mapped any more. */
1460 overlay_cache_invalid = 1;
1463 /* This version of "load" should be usable for any target. Currently
1464 it is just used for remote targets, not inftarg.c or core files,
1465 on the theory that only in that case is it useful.
1467 Avoiding xmodem and the like seems like a win (a) because we don't have
1468 to worry about finding it, and (b) On VMS, fork() is very slow and so
1469 we don't want to run a subprocess. On the other hand, I'm not sure how
1470 performance compares. */
1472 static int download_write_size = 512;
1473 static int validate_download = 0;
1475 /* Callback service function for generic_load (bfd_map_over_sections). */
1478 add_section_size_callback (bfd *abfd, asection *asec, void *data)
1480 bfd_size_type *sum = data;
1482 *sum += bfd_get_section_size_before_reloc (asec);
1485 /* Opaque data for load_section_callback. */
1486 struct load_section_data {
1487 unsigned long load_offset;
1488 unsigned long write_count;
1489 unsigned long data_count;
1490 bfd_size_type total_size;
1493 /* Callback service function for generic_load (bfd_map_over_sections). */
1496 load_section_callback (bfd *abfd, asection *asec, void *data)
1498 struct load_section_data *args = data;
1500 if (bfd_get_section_flags (abfd, asec) & SEC_LOAD)
1502 bfd_size_type size = bfd_get_section_size_before_reloc (asec);
1506 struct cleanup *old_chain;
1507 CORE_ADDR lma = bfd_section_lma (abfd, asec) + args->load_offset;
1508 bfd_size_type block_size;
1510 const char *sect_name = bfd_get_section_name (abfd, asec);
1513 if (download_write_size > 0 && size > download_write_size)
1514 block_size = download_write_size;
1518 buffer = xmalloc (size);
1519 old_chain = make_cleanup (xfree, buffer);
1521 /* Is this really necessary? I guess it gives the user something
1522 to look at during a long download. */
1523 ui_out_message (uiout, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1524 sect_name, paddr_nz (size), paddr_nz (lma));
1526 bfd_get_section_contents (abfd, asec, buffer, 0, size);
1532 bfd_size_type this_transfer = size - sent;
1534 if (this_transfer >= block_size)
1535 this_transfer = block_size;
1536 len = target_write_memory_partial (lma, buffer,
1537 this_transfer, &err);
1540 if (validate_download)
1542 /* Broken memories and broken monitors manifest
1543 themselves here when bring new computers to
1544 life. This doubles already slow downloads. */
1545 /* NOTE: cagney/1999-10-18: A more efficient
1546 implementation might add a verify_memory()
1547 method to the target vector and then use
1548 that. remote.c could implement that method
1549 using the ``qCRC'' packet. */
1550 char *check = xmalloc (len);
1551 struct cleanup *verify_cleanups =
1552 make_cleanup (xfree, check);
1554 if (target_read_memory (lma, check, len) != 0)
1555 error ("Download verify read failed at 0x%s",
1557 if (memcmp (buffer, check, len) != 0)
1558 error ("Download verify compare failed at 0x%s",
1560 do_cleanups (verify_cleanups);
1562 args->data_count += len;
1565 args->write_count += 1;
1568 || (ui_load_progress_hook != NULL
1569 && ui_load_progress_hook (sect_name, sent)))
1570 error ("Canceled the download");
1572 if (show_load_progress != NULL)
1573 show_load_progress (sect_name, sent, size,
1574 args->data_count, args->total_size);
1576 while (sent < size);
1579 error ("Memory access error while loading section %s.", sect_name);
1581 do_cleanups (old_chain);
1587 generic_load (char *args, int from_tty)
1591 time_t start_time, end_time; /* Start and end times of download */
1593 struct cleanup *old_cleanups;
1595 struct load_section_data cbdata;
1598 cbdata.load_offset = 0; /* Offset to add to vma for each section. */
1599 cbdata.write_count = 0; /* Number of writes needed. */
1600 cbdata.data_count = 0; /* Number of bytes written to target memory. */
1601 cbdata.total_size = 0; /* Total size of all bfd sectors. */
1603 /* Parse the input argument - the user can specify a load offset as
1604 a second argument. */
1605 filename = xmalloc (strlen (args) + 1);
1606 old_cleanups = make_cleanup (xfree, filename);
1607 strcpy (filename, args);
1608 offptr = strchr (filename, ' ');
1613 cbdata.load_offset = strtoul (offptr, &endptr, 0);
1614 if (offptr == endptr)
1615 error ("Invalid download offset:%s\n", offptr);
1619 cbdata.load_offset = 0;
1621 /* Open the file for loading. */
1622 loadfile_bfd = bfd_openr (filename, gnutarget);
1623 if (loadfile_bfd == NULL)
1625 perror_with_name (filename);
1629 /* FIXME: should be checking for errors from bfd_close (for one thing,
1630 on error it does not free all the storage associated with the
1632 make_cleanup_bfd_close (loadfile_bfd);
1634 if (!bfd_check_format (loadfile_bfd, bfd_object))
1636 error ("\"%s\" is not an object file: %s", filename,
1637 bfd_errmsg (bfd_get_error ()));
1640 bfd_map_over_sections (loadfile_bfd, add_section_size_callback,
1641 (void *) &cbdata.total_size);
1643 start_time = time (NULL);
1645 bfd_map_over_sections (loadfile_bfd, load_section_callback, &cbdata);
1647 end_time = time (NULL);
1649 entry = bfd_get_start_address (loadfile_bfd);
1650 ui_out_text (uiout, "Start address ");
1651 ui_out_field_fmt (uiout, "address", "0x%s", paddr_nz (entry));
1652 ui_out_text (uiout, ", load size ");
1653 ui_out_field_fmt (uiout, "load-size", "%lu", cbdata.data_count);
1654 ui_out_text (uiout, "\n");
1655 /* We were doing this in remote-mips.c, I suspect it is right
1656 for other targets too. */
1659 /* FIXME: are we supposed to call symbol_file_add or not? According to
1660 a comment from remote-mips.c (where a call to symbol_file_add was
1661 commented out), making the call confuses GDB if more than one file is
1662 loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c
1665 print_transfer_performance (gdb_stdout, cbdata.data_count,
1666 cbdata.write_count, end_time - start_time);
1668 do_cleanups (old_cleanups);
1671 /* Report how fast the transfer went. */
1673 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1674 replaced by print_transfer_performance (with a very different
1675 function signature). */
1678 report_transfer_performance (unsigned long data_count, time_t start_time,
1681 print_transfer_performance (gdb_stdout, data_count,
1682 end_time - start_time, 0);
1686 print_transfer_performance (struct ui_file *stream,
1687 unsigned long data_count,
1688 unsigned long write_count,
1689 unsigned long time_count)
1691 ui_out_text (uiout, "Transfer rate: ");
1694 ui_out_field_fmt (uiout, "transfer-rate", "%lu",
1695 (data_count * 8) / time_count);
1696 ui_out_text (uiout, " bits/sec");
1700 ui_out_field_fmt (uiout, "transferred-bits", "%lu", (data_count * 8));
1701 ui_out_text (uiout, " bits in <1 sec");
1703 if (write_count > 0)
1705 ui_out_text (uiout, ", ");
1706 ui_out_field_fmt (uiout, "write-rate", "%lu", data_count / write_count);
1707 ui_out_text (uiout, " bytes/write");
1709 ui_out_text (uiout, ".\n");
1712 /* This function allows the addition of incrementally linked object files.
1713 It does not modify any state in the target, only in the debugger. */
1714 /* Note: ezannoni 2000-04-13 This function/command used to have a
1715 special case syntax for the rombug target (Rombug is the boot
1716 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
1717 rombug case, the user doesn't need to supply a text address,
1718 instead a call to target_link() (in target.c) would supply the
1719 value to use. We are now discontinuing this type of ad hoc syntax. */
1723 add_symbol_file_command (char *args, int from_tty)
1725 char *filename = NULL;
1726 int flags = OBJF_USERLOADED;
1728 int expecting_option = 0;
1729 int section_index = 0;
1733 int expecting_sec_name = 0;
1734 int expecting_sec_addr = 0;
1740 } sect_opts[SECT_OFF_MAX];
1742 struct section_addr_info section_addrs;
1743 struct cleanup *my_cleanups = make_cleanup (null_cleanup, NULL);
1748 error ("add-symbol-file takes a file name and an address");
1750 /* Make a copy of the string that we can safely write into. */
1751 args = xstrdup (args);
1753 /* Ensure section_addrs is initialized */
1754 memset (§ion_addrs, 0, sizeof (section_addrs));
1756 while (*args != '\000')
1758 /* Any leading spaces? */
1759 while (isspace (*args))
1762 /* Point arg to the beginning of the argument. */
1765 /* Move args pointer over the argument. */
1766 while ((*args != '\000') && !isspace (*args))
1769 /* If there are more arguments, terminate arg and
1771 if (*args != '\000')
1774 /* Now process the argument. */
1777 /* The first argument is the file name. */
1778 filename = tilde_expand (arg);
1779 make_cleanup (xfree, filename);
1784 /* The second argument is always the text address at which
1785 to load the program. */
1786 sect_opts[section_index].name = ".text";
1787 sect_opts[section_index].value = arg;
1792 /* It's an option (starting with '-') or it's an argument
1797 if (strcmp (arg, "-mapped") == 0)
1798 flags |= OBJF_MAPPED;
1800 if (strcmp (arg, "-readnow") == 0)
1801 flags |= OBJF_READNOW;
1803 if (strcmp (arg, "-s") == 0)
1805 if (section_index >= SECT_OFF_MAX)
1806 error ("Too many sections specified.");
1807 expecting_sec_name = 1;
1808 expecting_sec_addr = 1;
1813 if (expecting_sec_name)
1815 sect_opts[section_index].name = arg;
1816 expecting_sec_name = 0;
1819 if (expecting_sec_addr)
1821 sect_opts[section_index].value = arg;
1822 expecting_sec_addr = 0;
1826 error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*");
1832 /* Print the prompt for the query below. And save the arguments into
1833 a sect_addr_info structure to be passed around to other
1834 functions. We have to split this up into separate print
1835 statements because local_hex_string returns a local static
1838 printf_filtered ("add symbol table from file \"%s\" at\n", filename);
1839 for (i = 0; i < section_index; i++)
1842 char *val = sect_opts[i].value;
1843 char *sec = sect_opts[i].name;
1845 val = sect_opts[i].value;
1846 if (val[0] == '0' && val[1] == 'x')
1847 addr = strtoul (val+2, NULL, 16);
1849 addr = strtoul (val, NULL, 10);
1851 /* Here we store the section offsets in the order they were
1852 entered on the command line. */
1853 section_addrs.other[sec_num].name = sec;
1854 section_addrs.other[sec_num].addr = addr;
1855 printf_filtered ("\t%s_addr = %s\n",
1857 local_hex_string ((unsigned long)addr));
1860 /* The object's sections are initialized when a
1861 call is made to build_objfile_section_table (objfile).
1862 This happens in reread_symbols.
1863 At this point, we don't know what file type this is,
1864 so we can't determine what section names are valid. */
1867 if (from_tty && (!query ("%s", "")))
1868 error ("Not confirmed.");
1870 symbol_file_add (filename, from_tty, §ion_addrs, 0, flags);
1872 /* Getting new symbols may change our opinion about what is
1874 reinit_frame_cache ();
1875 do_cleanups (my_cleanups);
1879 add_shared_symbol_files_command (char *args, int from_tty)
1881 #ifdef ADD_SHARED_SYMBOL_FILES
1882 ADD_SHARED_SYMBOL_FILES (args, from_tty);
1884 error ("This command is not available in this configuration of GDB.");
1888 /* Re-read symbols if a symbol-file has changed. */
1890 reread_symbols (void)
1892 struct objfile *objfile;
1895 struct stat new_statbuf;
1898 /* With the addition of shared libraries, this should be modified,
1899 the load time should be saved in the partial symbol tables, since
1900 different tables may come from different source files. FIXME.
1901 This routine should then walk down each partial symbol table
1902 and see if the symbol table that it originates from has been changed */
1904 for (objfile = object_files; objfile; objfile = objfile->next)
1908 #ifdef IBM6000_TARGET
1909 /* If this object is from a shared library, then you should
1910 stat on the library name, not member name. */
1912 if (objfile->obfd->my_archive)
1913 res = stat (objfile->obfd->my_archive->filename, &new_statbuf);
1916 res = stat (objfile->name, &new_statbuf);
1919 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1920 printf_filtered ("`%s' has disappeared; keeping its symbols.\n",
1924 new_modtime = new_statbuf.st_mtime;
1925 if (new_modtime != objfile->mtime)
1927 struct cleanup *old_cleanups;
1928 struct section_offsets *offsets;
1930 char *obfd_filename;
1932 printf_filtered ("`%s' has changed; re-reading symbols.\n",
1935 /* There are various functions like symbol_file_add,
1936 symfile_bfd_open, syms_from_objfile, etc., which might
1937 appear to do what we want. But they have various other
1938 effects which we *don't* want. So we just do stuff
1939 ourselves. We don't worry about mapped files (for one thing,
1940 any mapped file will be out of date). */
1942 /* If we get an error, blow away this objfile (not sure if
1943 that is the correct response for things like shared
1945 old_cleanups = make_cleanup_free_objfile (objfile);
1946 /* We need to do this whenever any symbols go away. */
1947 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
1949 /* Clean up any state BFD has sitting around. We don't need
1950 to close the descriptor but BFD lacks a way of closing the
1951 BFD without closing the descriptor. */
1952 obfd_filename = bfd_get_filename (objfile->obfd);
1953 if (!bfd_close (objfile->obfd))
1954 error ("Can't close BFD for %s: %s", objfile->name,
1955 bfd_errmsg (bfd_get_error ()));
1956 objfile->obfd = bfd_openr (obfd_filename, gnutarget);
1957 if (objfile->obfd == NULL)
1958 error ("Can't open %s to read symbols.", objfile->name);
1959 /* bfd_openr sets cacheable to true, which is what we want. */
1960 if (!bfd_check_format (objfile->obfd, bfd_object))
1961 error ("Can't read symbols from %s: %s.", objfile->name,
1962 bfd_errmsg (bfd_get_error ()));
1964 /* Save the offsets, we will nuke them with the rest of the
1966 num_offsets = objfile->num_sections;
1967 offsets = (struct section_offsets *) alloca (SIZEOF_SECTION_OFFSETS);
1968 memcpy (offsets, objfile->section_offsets, SIZEOF_SECTION_OFFSETS);
1970 /* Nuke all the state that we will re-read. Much of the following
1971 code which sets things to NULL really is necessary to tell
1972 other parts of GDB that there is nothing currently there. */
1974 /* FIXME: Do we have to free a whole linked list, or is this
1976 if (objfile->global_psymbols.list)
1977 xmfree (objfile->md, objfile->global_psymbols.list);
1978 memset (&objfile->global_psymbols, 0,
1979 sizeof (objfile->global_psymbols));
1980 if (objfile->static_psymbols.list)
1981 xmfree (objfile->md, objfile->static_psymbols.list);
1982 memset (&objfile->static_psymbols, 0,
1983 sizeof (objfile->static_psymbols));
1985 /* Free the obstacks for non-reusable objfiles */
1986 bcache_xfree (objfile->psymbol_cache);
1987 objfile->psymbol_cache = bcache_xmalloc ();
1988 bcache_xfree (objfile->macro_cache);
1989 objfile->macro_cache = bcache_xmalloc ();
1990 obstack_free (&objfile->psymbol_obstack, 0);
1991 obstack_free (&objfile->symbol_obstack, 0);
1992 obstack_free (&objfile->type_obstack, 0);
1993 objfile->sections = NULL;
1994 objfile->symtabs = NULL;
1995 objfile->psymtabs = NULL;
1996 objfile->free_psymtabs = NULL;
1997 objfile->msymbols = NULL;
1998 objfile->minimal_symbol_count = 0;
1999 memset (&objfile->msymbol_hash, 0,
2000 sizeof (objfile->msymbol_hash));
2001 memset (&objfile->msymbol_demangled_hash, 0,
2002 sizeof (objfile->msymbol_demangled_hash));
2003 objfile->fundamental_types = NULL;
2004 if (objfile->sf != NULL)
2006 (*objfile->sf->sym_finish) (objfile);
2009 /* We never make this a mapped file. */
2011 /* obstack_specify_allocation also initializes the obstack so
2013 objfile->psymbol_cache = bcache_xmalloc ();
2014 objfile->macro_cache = bcache_xmalloc ();
2015 obstack_specify_allocation (&objfile->psymbol_obstack, 0, 0,
2017 obstack_specify_allocation (&objfile->symbol_obstack, 0, 0,
2019 obstack_specify_allocation (&objfile->type_obstack, 0, 0,
2021 if (build_objfile_section_table (objfile))
2023 error ("Can't find the file sections in `%s': %s",
2024 objfile->name, bfd_errmsg (bfd_get_error ()));
2027 /* We use the same section offsets as from last time. I'm not
2028 sure whether that is always correct for shared libraries. */
2029 objfile->section_offsets = (struct section_offsets *)
2030 obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS);
2031 memcpy (objfile->section_offsets, offsets, SIZEOF_SECTION_OFFSETS);
2032 objfile->num_sections = num_offsets;
2034 /* What the hell is sym_new_init for, anyway? The concept of
2035 distinguishing between the main file and additional files
2036 in this way seems rather dubious. */
2037 if (objfile == symfile_objfile)
2039 (*objfile->sf->sym_new_init) (objfile);
2041 RESET_HP_UX_GLOBALS ();
2045 (*objfile->sf->sym_init) (objfile);
2046 clear_complaints (&symfile_complaints, 1, 1);
2047 /* The "mainline" parameter is a hideous hack; I think leaving it
2048 zero is OK since dbxread.c also does what it needs to do if
2049 objfile->global_psymbols.size is 0. */
2050 (*objfile->sf->sym_read) (objfile, 0);
2051 if (!have_partial_symbols () && !have_full_symbols ())
2054 printf_filtered ("(no debugging symbols found)\n");
2057 objfile->flags |= OBJF_SYMS;
2059 /* We're done reading the symbol file; finish off complaints. */
2060 clear_complaints (&symfile_complaints, 0, 1);
2062 /* Getting new symbols may change our opinion about what is
2065 reinit_frame_cache ();
2067 /* Discard cleanups as symbol reading was successful. */
2068 discard_cleanups (old_cleanups);
2070 /* If the mtime has changed between the time we set new_modtime
2071 and now, we *want* this to be out of date, so don't call stat
2073 objfile->mtime = new_modtime;
2076 /* Call this after reading in a new symbol table to give target
2077 dependent code a crack at the new symbols. For instance, this
2078 could be used to update the values of target-specific symbols GDB
2079 needs to keep track of (such as _sigtramp, or whatever). */
2081 TARGET_SYMFILE_POSTREAD (objfile);
2083 reread_separate_symbols (objfile);
2089 clear_symtab_users ();
2093 /* Handle separate debug info for OBJFILE, which has just been
2095 - If we had separate debug info before, but now we don't, get rid
2096 of the separated objfile.
2097 - If we didn't have separated debug info before, but now we do,
2098 read in the new separated debug info file.
2099 - If the debug link points to a different file, toss the old one
2100 and read the new one.
2101 This function does *not* handle the case where objfile is still
2102 using the same separate debug info file, but that file's timestamp
2103 has changed. That case should be handled by the loop in
2104 reread_symbols already. */
2106 reread_separate_symbols (struct objfile *objfile)
2109 unsigned long crc32;
2111 /* Does the updated objfile's debug info live in a
2113 debug_file = find_separate_debug_file (objfile);
2115 if (objfile->separate_debug_objfile)
2117 /* There are two cases where we need to get rid of
2118 the old separated debug info objfile:
2119 - if the new primary objfile doesn't have
2120 separated debug info, or
2121 - if the new primary objfile has separate debug
2122 info, but it's under a different filename.
2124 If the old and new objfiles both have separate
2125 debug info, under the same filename, then we're
2126 okay --- if the separated file's contents have
2127 changed, we will have caught that when we
2128 visited it in this function's outermost
2131 || strcmp (debug_file, objfile->separate_debug_objfile->name) != 0)
2132 free_objfile (objfile->separate_debug_objfile);
2135 /* If the new objfile has separate debug info, and we
2136 haven't loaded it already, do so now. */
2138 && ! objfile->separate_debug_objfile)
2140 /* Use the same section offset table as objfile itself.
2141 Preserve the flags from objfile that make sense. */
2142 objfile->separate_debug_objfile
2143 = (symbol_file_add_with_addrs_or_offsets
2145 info_verbose, /* from_tty: Don't override the default. */
2146 0, /* No addr table. */
2147 objfile->section_offsets, objfile->num_sections,
2148 0, /* Not mainline. See comments about this above. */
2149 objfile->flags & (OBJF_MAPPED | OBJF_REORDERED
2150 | OBJF_SHARED | OBJF_READNOW
2151 | OBJF_USERLOADED)));
2152 objfile->separate_debug_objfile->separate_debug_objfile_backlink
2168 static filename_language *filename_language_table;
2169 static int fl_table_size, fl_table_next;
2172 add_filename_language (char *ext, enum language lang)
2174 if (fl_table_next >= fl_table_size)
2176 fl_table_size += 10;
2177 filename_language_table =
2178 xrealloc (filename_language_table,
2179 fl_table_size * sizeof (*filename_language_table));
2182 filename_language_table[fl_table_next].ext = xstrdup (ext);
2183 filename_language_table[fl_table_next].lang = lang;
2187 static char *ext_args;
2190 set_ext_lang_command (char *args, int from_tty)
2193 char *cp = ext_args;
2196 /* First arg is filename extension, starting with '.' */
2198 error ("'%s': Filename extension must begin with '.'", ext_args);
2200 /* Find end of first arg. */
2201 while (*cp && !isspace (*cp))
2205 error ("'%s': two arguments required -- filename extension and language",
2208 /* Null-terminate first arg */
2211 /* Find beginning of second arg, which should be a source language. */
2212 while (*cp && isspace (*cp))
2216 error ("'%s': two arguments required -- filename extension and language",
2219 /* Lookup the language from among those we know. */
2220 lang = language_enum (cp);
2222 /* Now lookup the filename extension: do we already know it? */
2223 for (i = 0; i < fl_table_next; i++)
2224 if (0 == strcmp (ext_args, filename_language_table[i].ext))
2227 if (i >= fl_table_next)
2229 /* new file extension */
2230 add_filename_language (ext_args, lang);
2234 /* redefining a previously known filename extension */
2237 /* query ("Really make files of type %s '%s'?", */
2238 /* ext_args, language_str (lang)); */
2240 xfree (filename_language_table[i].ext);
2241 filename_language_table[i].ext = xstrdup (ext_args);
2242 filename_language_table[i].lang = lang;
2247 info_ext_lang_command (char *args, int from_tty)
2251 printf_filtered ("Filename extensions and the languages they represent:");
2252 printf_filtered ("\n\n");
2253 for (i = 0; i < fl_table_next; i++)
2254 printf_filtered ("\t%s\t- %s\n",
2255 filename_language_table[i].ext,
2256 language_str (filename_language_table[i].lang));
2260 init_filename_language_table (void)
2262 if (fl_table_size == 0) /* protect against repetition */
2266 filename_language_table =
2267 xmalloc (fl_table_size * sizeof (*filename_language_table));
2268 add_filename_language (".c", language_c);
2269 add_filename_language (".C", language_cplus);
2270 add_filename_language (".cc", language_cplus);
2271 add_filename_language (".cp", language_cplus);
2272 add_filename_language (".cpp", language_cplus);
2273 add_filename_language (".cxx", language_cplus);
2274 add_filename_language (".c++", language_cplus);
2275 add_filename_language (".java", language_java);
2276 add_filename_language (".class", language_java);
2277 add_filename_language (".m", language_objc);
2278 add_filename_language (".f", language_fortran);
2279 add_filename_language (".F", language_fortran);
2280 add_filename_language (".s", language_asm);
2281 add_filename_language (".S", language_asm);
2282 add_filename_language (".pas", language_pascal);
2283 add_filename_language (".p", language_pascal);
2284 add_filename_language (".pp", language_pascal);
2289 deduce_language_from_filename (char *filename)
2294 if (filename != NULL)
2295 if ((cp = strrchr (filename, '.')) != NULL)
2296 for (i = 0; i < fl_table_next; i++)
2297 if (strcmp (cp, filename_language_table[i].ext) == 0)
2298 return filename_language_table[i].lang;
2300 return language_unknown;
2305 Allocate and partly initialize a new symbol table. Return a pointer
2306 to it. error() if no space.
2308 Caller must set these fields:
2314 possibly free_named_symtabs (symtab->filename);
2318 allocate_symtab (char *filename, struct objfile *objfile)
2320 register struct symtab *symtab;
2322 symtab = (struct symtab *)
2323 obstack_alloc (&objfile->symbol_obstack, sizeof (struct symtab));
2324 memset (symtab, 0, sizeof (*symtab));
2325 symtab->filename = obsavestring (filename, strlen (filename),
2326 &objfile->symbol_obstack);
2327 symtab->fullname = NULL;
2328 symtab->language = deduce_language_from_filename (filename);
2329 symtab->debugformat = obsavestring ("unknown", 7,
2330 &objfile->symbol_obstack);
2332 /* Hook it to the objfile it comes from */
2334 symtab->objfile = objfile;
2335 symtab->next = objfile->symtabs;
2336 objfile->symtabs = symtab;
2338 /* FIXME: This should go away. It is only defined for the Z8000,
2339 and the Z8000 definition of this macro doesn't have anything to
2340 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
2341 here for convenience. */
2342 #ifdef INIT_EXTRA_SYMTAB_INFO
2343 INIT_EXTRA_SYMTAB_INFO (symtab);
2349 struct partial_symtab *
2350 allocate_psymtab (char *filename, struct objfile *objfile)
2352 struct partial_symtab *psymtab;
2354 if (objfile->free_psymtabs)
2356 psymtab = objfile->free_psymtabs;
2357 objfile->free_psymtabs = psymtab->next;
2360 psymtab = (struct partial_symtab *)
2361 obstack_alloc (&objfile->psymbol_obstack,
2362 sizeof (struct partial_symtab));
2364 memset (psymtab, 0, sizeof (struct partial_symtab));
2365 psymtab->filename = obsavestring (filename, strlen (filename),
2366 &objfile->psymbol_obstack);
2367 psymtab->symtab = NULL;
2369 /* Prepend it to the psymtab list for the objfile it belongs to.
2370 Psymtabs are searched in most recent inserted -> least recent
2373 psymtab->objfile = objfile;
2374 psymtab->next = objfile->psymtabs;
2375 objfile->psymtabs = psymtab;
2378 struct partial_symtab **prev_pst;
2379 psymtab->objfile = objfile;
2380 psymtab->next = NULL;
2381 prev_pst = &(objfile->psymtabs);
2382 while ((*prev_pst) != NULL)
2383 prev_pst = &((*prev_pst)->next);
2384 (*prev_pst) = psymtab;
2392 discard_psymtab (struct partial_symtab *pst)
2394 struct partial_symtab **prev_pst;
2397 Empty psymtabs happen as a result of header files which don't
2398 have any symbols in them. There can be a lot of them. But this
2399 check is wrong, in that a psymtab with N_SLINE entries but
2400 nothing else is not empty, but we don't realize that. Fixing
2401 that without slowing things down might be tricky. */
2403 /* First, snip it out of the psymtab chain */
2405 prev_pst = &(pst->objfile->psymtabs);
2406 while ((*prev_pst) != pst)
2407 prev_pst = &((*prev_pst)->next);
2408 (*prev_pst) = pst->next;
2410 /* Next, put it on a free list for recycling */
2412 pst->next = pst->objfile->free_psymtabs;
2413 pst->objfile->free_psymtabs = pst;
2417 /* Reset all data structures in gdb which may contain references to symbol
2421 clear_symtab_users (void)
2423 /* Someday, we should do better than this, by only blowing away
2424 the things that really need to be blown. */
2425 clear_value_history ();
2427 clear_internalvars ();
2428 breakpoint_re_set ();
2429 set_default_breakpoint (0, 0, 0, 0);
2430 clear_current_source_symtab_and_line ();
2431 clear_pc_function_cache ();
2432 if (target_new_objfile_hook)
2433 target_new_objfile_hook (NULL);
2437 clear_symtab_users_cleanup (void *ignore)
2439 clear_symtab_users ();
2442 /* clear_symtab_users_once:
2444 This function is run after symbol reading, or from a cleanup.
2445 If an old symbol table was obsoleted, the old symbol table
2446 has been blown away, but the other GDB data structures that may
2447 reference it have not yet been cleared or re-directed. (The old
2448 symtab was zapped, and the cleanup queued, in free_named_symtab()
2451 This function can be queued N times as a cleanup, or called
2452 directly; it will do all the work the first time, and then will be a
2453 no-op until the next time it is queued. This works by bumping a
2454 counter at queueing time. Much later when the cleanup is run, or at
2455 the end of symbol processing (in case the cleanup is discarded), if
2456 the queued count is greater than the "done-count", we do the work
2457 and set the done-count to the queued count. If the queued count is
2458 less than or equal to the done-count, we just ignore the call. This
2459 is needed because reading a single .o file will often replace many
2460 symtabs (one per .h file, for example), and we don't want to reset
2461 the breakpoints N times in the user's face.
2463 The reason we both queue a cleanup, and call it directly after symbol
2464 reading, is because the cleanup protects us in case of errors, but is
2465 discarded if symbol reading is successful. */
2468 /* FIXME: As free_named_symtabs is currently a big noop this function
2469 is no longer needed. */
2470 static void clear_symtab_users_once (void);
2472 static int clear_symtab_users_queued;
2473 static int clear_symtab_users_done;
2476 clear_symtab_users_once (void)
2478 /* Enforce once-per-`do_cleanups'-semantics */
2479 if (clear_symtab_users_queued <= clear_symtab_users_done)
2481 clear_symtab_users_done = clear_symtab_users_queued;
2483 clear_symtab_users ();
2487 /* Delete the specified psymtab, and any others that reference it. */
2490 cashier_psymtab (struct partial_symtab *pst)
2492 struct partial_symtab *ps, *pprev = NULL;
2495 /* Find its previous psymtab in the chain */
2496 for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
2505 /* Unhook it from the chain. */
2506 if (ps == pst->objfile->psymtabs)
2507 pst->objfile->psymtabs = ps->next;
2509 pprev->next = ps->next;
2511 /* FIXME, we can't conveniently deallocate the entries in the
2512 partial_symbol lists (global_psymbols/static_psymbols) that
2513 this psymtab points to. These just take up space until all
2514 the psymtabs are reclaimed. Ditto the dependencies list and
2515 filename, which are all in the psymbol_obstack. */
2517 /* We need to cashier any psymtab that has this one as a dependency... */
2519 for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
2521 for (i = 0; i < ps->number_of_dependencies; i++)
2523 if (ps->dependencies[i] == pst)
2525 cashier_psymtab (ps);
2526 goto again; /* Must restart, chain has been munged. */
2533 /* If a symtab or psymtab for filename NAME is found, free it along
2534 with any dependent breakpoints, displays, etc.
2535 Used when loading new versions of object modules with the "add-file"
2536 command. This is only called on the top-level symtab or psymtab's name;
2537 it is not called for subsidiary files such as .h files.
2539 Return value is 1 if we blew away the environment, 0 if not.
2540 FIXME. The return value appears to never be used.
2542 FIXME. I think this is not the best way to do this. We should
2543 work on being gentler to the environment while still cleaning up
2544 all stray pointers into the freed symtab. */
2547 free_named_symtabs (char *name)
2550 /* FIXME: With the new method of each objfile having it's own
2551 psymtab list, this function needs serious rethinking. In particular,
2552 why was it ever necessary to toss psymtabs with specific compilation
2553 unit filenames, as opposed to all psymtabs from a particular symbol
2555 Well, the answer is that some systems permit reloading of particular
2556 compilation units. We want to blow away any old info about these
2557 compilation units, regardless of which objfiles they arrived in. --gnu. */
2559 register struct symtab *s;
2560 register struct symtab *prev;
2561 register struct partial_symtab *ps;
2562 struct blockvector *bv;
2565 /* We only wack things if the symbol-reload switch is set. */
2566 if (!symbol_reloading)
2569 /* Some symbol formats have trouble providing file names... */
2570 if (name == 0 || *name == '\0')
2573 /* Look for a psymtab with the specified name. */
2576 for (ps = partial_symtab_list; ps; ps = ps->next)
2578 if (STREQ (name, ps->filename))
2580 cashier_psymtab (ps); /* Blow it away...and its little dog, too. */
2581 goto again2; /* Must restart, chain has been munged */
2585 /* Look for a symtab with the specified name. */
2587 for (s = symtab_list; s; s = s->next)
2589 if (STREQ (name, s->filename))
2596 if (s == symtab_list)
2597 symtab_list = s->next;
2599 prev->next = s->next;
2601 /* For now, queue a delete for all breakpoints, displays, etc., whether
2602 or not they depend on the symtab being freed. This should be
2603 changed so that only those data structures affected are deleted. */
2605 /* But don't delete anything if the symtab is empty.
2606 This test is necessary due to a bug in "dbxread.c" that
2607 causes empty symtabs to be created for N_SO symbols that
2608 contain the pathname of the object file. (This problem
2609 has been fixed in GDB 3.9x). */
2611 bv = BLOCKVECTOR (s);
2612 if (BLOCKVECTOR_NBLOCKS (bv) > 2
2613 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK))
2614 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)))
2616 complaint (&symfile_complaints, "Replacing old symbols for `%s'",
2618 clear_symtab_users_queued++;
2619 make_cleanup (clear_symtab_users_once, 0);
2624 complaint (&symfile_complaints, "Empty symbol table found for `%s'",
2632 /* It is still possible that some breakpoints will be affected
2633 even though no symtab was found, since the file might have
2634 been compiled without debugging, and hence not be associated
2635 with a symtab. In order to handle this correctly, we would need
2636 to keep a list of text address ranges for undebuggable files.
2637 For now, we do nothing, since this is a fairly obscure case. */
2641 /* FIXME, what about the minimal symbol table? */
2648 /* Allocate and partially fill a partial symtab. It will be
2649 completely filled at the end of the symbol list.
2651 FILENAME is the name of the symbol-file we are reading from. */
2653 struct partial_symtab *
2654 start_psymtab_common (struct objfile *objfile,
2655 struct section_offsets *section_offsets, char *filename,
2656 CORE_ADDR textlow, struct partial_symbol **global_syms,
2657 struct partial_symbol **static_syms)
2659 struct partial_symtab *psymtab;
2661 psymtab = allocate_psymtab (filename, objfile);
2662 psymtab->section_offsets = section_offsets;
2663 psymtab->textlow = textlow;
2664 psymtab->texthigh = psymtab->textlow; /* default */
2665 psymtab->globals_offset = global_syms - objfile->global_psymbols.list;
2666 psymtab->statics_offset = static_syms - objfile->static_psymbols.list;
2670 /* Add a symbol with a long value to a psymtab.
2671 Since one arg is a struct, we pass in a ptr and deref it (sigh). */
2674 add_psymbol_to_list (char *name, int namelength, namespace_enum namespace,
2675 enum address_class class,
2676 struct psymbol_allocation_list *list, long val, /* Value as a long */
2677 CORE_ADDR coreaddr, /* Value as a CORE_ADDR */
2678 enum language language, struct objfile *objfile)
2680 register struct partial_symbol *psym;
2681 char *buf = alloca (namelength + 1);
2682 /* psymbol is static so that there will be no uninitialized gaps in the
2683 structure which might contain random data, causing cache misses in
2685 static struct partial_symbol psymbol;
2687 /* Create local copy of the partial symbol */
2688 memcpy (buf, name, namelength);
2689 buf[namelength] = '\0';
2690 SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, objfile->psymbol_cache);
2691 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2694 SYMBOL_VALUE (&psymbol) = val;
2698 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
2700 SYMBOL_SECTION (&psymbol) = 0;
2701 SYMBOL_LANGUAGE (&psymbol) = language;
2702 PSYMBOL_NAMESPACE (&psymbol) = namespace;
2703 PSYMBOL_CLASS (&psymbol) = class;
2704 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language);
2706 /* Stash the partial symbol away in the cache */
2707 psym = bcache (&psymbol, sizeof (struct partial_symbol), objfile->psymbol_cache);
2709 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2710 if (list->next >= list->list + list->size)
2712 extend_psymbol_list (list, objfile);
2714 *list->next++ = psym;
2715 OBJSTAT (objfile, n_psyms++);
2718 /* Add a symbol with a long value to a psymtab. This differs from
2719 * add_psymbol_to_list above in taking both a mangled and a demangled
2723 add_psymbol_with_dem_name_to_list (char *name, int namelength, char *dem_name,
2724 int dem_namelength, namespace_enum namespace,
2725 enum address_class class,
2726 struct psymbol_allocation_list *list, long val, /* Value as a long */
2727 CORE_ADDR coreaddr, /* Value as a CORE_ADDR */
2728 enum language language,
2729 struct objfile *objfile)
2731 register struct partial_symbol *psym;
2732 char *buf = alloca (namelength + 1);
2733 /* psymbol is static so that there will be no uninitialized gaps in the
2734 structure which might contain random data, causing cache misses in
2736 static struct partial_symbol psymbol;
2738 /* Create local copy of the partial symbol */
2740 memcpy (buf, name, namelength);
2741 buf[namelength] = '\0';
2742 SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, objfile->psymbol_cache);
2744 buf = alloca (dem_namelength + 1);
2745 memcpy (buf, dem_name, dem_namelength);
2746 buf[dem_namelength] = '\0';
2751 case language_cplus:
2752 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol) =
2753 bcache (buf, dem_namelength + 1, objfile->psymbol_cache);
2755 /* FIXME What should be done for the default case? Ignoring for now. */
2758 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2761 SYMBOL_VALUE (&psymbol) = val;
2765 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
2767 SYMBOL_SECTION (&psymbol) = 0;
2768 SYMBOL_LANGUAGE (&psymbol) = language;
2769 PSYMBOL_NAMESPACE (&psymbol) = namespace;
2770 PSYMBOL_CLASS (&psymbol) = class;
2771 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language);
2773 /* Stash the partial symbol away in the cache */
2774 psym = bcache (&psymbol, sizeof (struct partial_symbol), objfile->psymbol_cache);
2776 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2777 if (list->next >= list->list + list->size)
2779 extend_psymbol_list (list, objfile);
2781 *list->next++ = psym;
2782 OBJSTAT (objfile, n_psyms++);
2785 /* Initialize storage for partial symbols. */
2788 init_psymbol_list (struct objfile *objfile, int total_symbols)
2790 /* Free any previously allocated psymbol lists. */
2792 if (objfile->global_psymbols.list)
2794 xmfree (objfile->md, objfile->global_psymbols.list);
2796 if (objfile->static_psymbols.list)
2798 xmfree (objfile->md, objfile->static_psymbols.list);
2801 /* Current best guess is that approximately a twentieth
2802 of the total symbols (in a debugging file) are global or static
2805 objfile->global_psymbols.size = total_symbols / 10;
2806 objfile->static_psymbols.size = total_symbols / 10;
2808 if (objfile->global_psymbols.size > 0)
2810 objfile->global_psymbols.next =
2811 objfile->global_psymbols.list = (struct partial_symbol **)
2812 xmmalloc (objfile->md, (objfile->global_psymbols.size
2813 * sizeof (struct partial_symbol *)));
2815 if (objfile->static_psymbols.size > 0)
2817 objfile->static_psymbols.next =
2818 objfile->static_psymbols.list = (struct partial_symbol **)
2819 xmmalloc (objfile->md, (objfile->static_psymbols.size
2820 * sizeof (struct partial_symbol *)));
2825 The following code implements an abstraction for debugging overlay sections.
2827 The target model is as follows:
2828 1) The gnu linker will permit multiple sections to be mapped into the
2829 same VMA, each with its own unique LMA (or load address).
2830 2) It is assumed that some runtime mechanism exists for mapping the
2831 sections, one by one, from the load address into the VMA address.
2832 3) This code provides a mechanism for gdb to keep track of which
2833 sections should be considered to be mapped from the VMA to the LMA.
2834 This information is used for symbol lookup, and memory read/write.
2835 For instance, if a section has been mapped then its contents
2836 should be read from the VMA, otherwise from the LMA.
2838 Two levels of debugger support for overlays are available. One is
2839 "manual", in which the debugger relies on the user to tell it which
2840 overlays are currently mapped. This level of support is
2841 implemented entirely in the core debugger, and the information about
2842 whether a section is mapped is kept in the objfile->obj_section table.
2844 The second level of support is "automatic", and is only available if
2845 the target-specific code provides functionality to read the target's
2846 overlay mapping table, and translate its contents for the debugger
2847 (by updating the mapped state information in the obj_section tables).
2849 The interface is as follows:
2851 overlay map <name> -- tell gdb to consider this section mapped
2852 overlay unmap <name> -- tell gdb to consider this section unmapped
2853 overlay list -- list the sections that GDB thinks are mapped
2854 overlay read-target -- get the target's state of what's mapped
2855 overlay off/manual/auto -- set overlay debugging state
2856 Functional interface:
2857 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2858 section, return that section.
2859 find_pc_overlay(pc): find any overlay section that contains
2860 the pc, either in its VMA or its LMA
2861 overlay_is_mapped(sect): true if overlay is marked as mapped
2862 section_is_overlay(sect): true if section's VMA != LMA
2863 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2864 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2865 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2866 overlay_mapped_address(...): map an address from section's LMA to VMA
2867 overlay_unmapped_address(...): map an address from section's VMA to LMA
2868 symbol_overlayed_address(...): Return a "current" address for symbol:
2869 either in VMA or LMA depending on whether
2870 the symbol's section is currently mapped
2873 /* Overlay debugging state: */
2875 enum overlay_debugging_state overlay_debugging = ovly_off;
2876 int overlay_cache_invalid = 0; /* True if need to refresh mapped state */
2878 /* Target vector for refreshing overlay mapped state */
2879 static void simple_overlay_update (struct obj_section *);
2880 void (*target_overlay_update) (struct obj_section *) = simple_overlay_update;
2882 /* Function: section_is_overlay (SECTION)
2883 Returns true if SECTION has VMA not equal to LMA, ie.
2884 SECTION is loaded at an address different from where it will "run". */
2887 section_is_overlay (asection *section)
2889 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2891 if (overlay_debugging)
2892 if (section && section->lma != 0 &&
2893 section->vma != section->lma)
2899 /* Function: overlay_invalidate_all (void)
2900 Invalidate the mapped state of all overlay sections (mark it as stale). */
2903 overlay_invalidate_all (void)
2905 struct objfile *objfile;
2906 struct obj_section *sect;
2908 ALL_OBJSECTIONS (objfile, sect)
2909 if (section_is_overlay (sect->the_bfd_section))
2910 sect->ovly_mapped = -1;
2913 /* Function: overlay_is_mapped (SECTION)
2914 Returns true if section is an overlay, and is currently mapped.
2915 Private: public access is thru function section_is_mapped.
2917 Access to the ovly_mapped flag is restricted to this function, so
2918 that we can do automatic update. If the global flag
2919 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2920 overlay_invalidate_all. If the mapped state of the particular
2921 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2924 overlay_is_mapped (struct obj_section *osect)
2926 if (osect == 0 || !section_is_overlay (osect->the_bfd_section))
2929 switch (overlay_debugging)
2933 return 0; /* overlay debugging off */
2934 case ovly_auto: /* overlay debugging automatic */
2935 /* Unles there is a target_overlay_update function,
2936 there's really nothing useful to do here (can't really go auto) */
2937 if (target_overlay_update)
2939 if (overlay_cache_invalid)
2941 overlay_invalidate_all ();
2942 overlay_cache_invalid = 0;
2944 if (osect->ovly_mapped == -1)
2945 (*target_overlay_update) (osect);
2947 /* fall thru to manual case */
2948 case ovly_on: /* overlay debugging manual */
2949 return osect->ovly_mapped == 1;
2953 /* Function: section_is_mapped
2954 Returns true if section is an overlay, and is currently mapped. */
2957 section_is_mapped (asection *section)
2959 struct objfile *objfile;
2960 struct obj_section *osect;
2962 if (overlay_debugging)
2963 if (section && section_is_overlay (section))
2964 ALL_OBJSECTIONS (objfile, osect)
2965 if (osect->the_bfd_section == section)
2966 return overlay_is_mapped (osect);
2971 /* Function: pc_in_unmapped_range
2972 If PC falls into the lma range of SECTION, return true, else false. */
2975 pc_in_unmapped_range (CORE_ADDR pc, asection *section)
2977 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2981 if (overlay_debugging)
2982 if (section && section_is_overlay (section))
2984 size = bfd_get_section_size_before_reloc (section);
2985 if (section->lma <= pc && pc < section->lma + size)
2991 /* Function: pc_in_mapped_range
2992 If PC falls into the vma range of SECTION, return true, else false. */
2995 pc_in_mapped_range (CORE_ADDR pc, asection *section)
2997 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3001 if (overlay_debugging)
3002 if (section && section_is_overlay (section))
3004 size = bfd_get_section_size_before_reloc (section);
3005 if (section->vma <= pc && pc < section->vma + size)
3012 /* Return true if the mapped ranges of sections A and B overlap, false
3015 sections_overlap (asection *a, asection *b)
3017 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3019 CORE_ADDR a_start = a->vma;
3020 CORE_ADDR a_end = a->vma + bfd_get_section_size_before_reloc (a);
3021 CORE_ADDR b_start = b->vma;
3022 CORE_ADDR b_end = b->vma + bfd_get_section_size_before_reloc (b);
3024 return (a_start < b_end && b_start < a_end);
3027 /* Function: overlay_unmapped_address (PC, SECTION)
3028 Returns the address corresponding to PC in the unmapped (load) range.
3029 May be the same as PC. */
3032 overlay_unmapped_address (CORE_ADDR pc, asection *section)
3034 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
3036 if (overlay_debugging)
3037 if (section && section_is_overlay (section) &&
3038 pc_in_mapped_range (pc, section))
3039 return pc + section->lma - section->vma;
3044 /* Function: overlay_mapped_address (PC, SECTION)
3045 Returns the address corresponding to PC in the mapped (runtime) range.
3046 May be the same as PC. */
3049 overlay_mapped_address (CORE_ADDR pc, asection *section)
3051 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3053 if (overlay_debugging)
3054 if (section && section_is_overlay (section) &&
3055 pc_in_unmapped_range (pc, section))
3056 return pc + section->vma - section->lma;
3062 /* Function: symbol_overlayed_address
3063 Return one of two addresses (relative to the VMA or to the LMA),
3064 depending on whether the section is mapped or not. */
3067 symbol_overlayed_address (CORE_ADDR address, asection *section)
3069 if (overlay_debugging)
3071 /* If the symbol has no section, just return its regular address. */
3074 /* If the symbol's section is not an overlay, just return its address */
3075 if (!section_is_overlay (section))
3077 /* If the symbol's section is mapped, just return its address */
3078 if (section_is_mapped (section))
3081 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3082 * then return its LOADED address rather than its vma address!!
3084 return overlay_unmapped_address (address, section);
3089 /* Function: find_pc_overlay (PC)
3090 Return the best-match overlay section for PC:
3091 If PC matches a mapped overlay section's VMA, return that section.
3092 Else if PC matches an unmapped section's VMA, return that section.
3093 Else if PC matches an unmapped section's LMA, return that section. */
3096 find_pc_overlay (CORE_ADDR pc)
3098 struct objfile *objfile;
3099 struct obj_section *osect, *best_match = NULL;
3101 if (overlay_debugging)
3102 ALL_OBJSECTIONS (objfile, osect)
3103 if (section_is_overlay (osect->the_bfd_section))
3105 if (pc_in_mapped_range (pc, osect->the_bfd_section))
3107 if (overlay_is_mapped (osect))
3108 return osect->the_bfd_section;
3112 else if (pc_in_unmapped_range (pc, osect->the_bfd_section))
3115 return best_match ? best_match->the_bfd_section : NULL;
3118 /* Function: find_pc_mapped_section (PC)
3119 If PC falls into the VMA address range of an overlay section that is
3120 currently marked as MAPPED, return that section. Else return NULL. */
3123 find_pc_mapped_section (CORE_ADDR pc)
3125 struct objfile *objfile;
3126 struct obj_section *osect;
3128 if (overlay_debugging)
3129 ALL_OBJSECTIONS (objfile, osect)
3130 if (pc_in_mapped_range (pc, osect->the_bfd_section) &&
3131 overlay_is_mapped (osect))
3132 return osect->the_bfd_section;
3137 /* Function: list_overlays_command
3138 Print a list of mapped sections and their PC ranges */
3141 list_overlays_command (char *args, int from_tty)
3144 struct objfile *objfile;
3145 struct obj_section *osect;
3147 if (overlay_debugging)
3148 ALL_OBJSECTIONS (objfile, osect)
3149 if (overlay_is_mapped (osect))
3155 vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section);
3156 lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section);
3157 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
3158 name = bfd_section_name (objfile->obfd, osect->the_bfd_section);
3160 printf_filtered ("Section %s, loaded at ", name);
3161 print_address_numeric (lma, 1, gdb_stdout);
3162 puts_filtered (" - ");
3163 print_address_numeric (lma + size, 1, gdb_stdout);
3164 printf_filtered (", mapped at ");
3165 print_address_numeric (vma, 1, gdb_stdout);
3166 puts_filtered (" - ");
3167 print_address_numeric (vma + size, 1, gdb_stdout);
3168 puts_filtered ("\n");
3173 printf_filtered ("No sections are mapped.\n");
3176 /* Function: map_overlay_command
3177 Mark the named section as mapped (ie. residing at its VMA address). */
3180 map_overlay_command (char *args, int from_tty)
3182 struct objfile *objfile, *objfile2;
3183 struct obj_section *sec, *sec2;
3186 if (!overlay_debugging)
3188 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3189 the 'overlay manual' command.");
3191 if (args == 0 || *args == 0)
3192 error ("Argument required: name of an overlay section");
3194 /* First, find a section matching the user supplied argument */
3195 ALL_OBJSECTIONS (objfile, sec)
3196 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
3198 /* Now, check to see if the section is an overlay. */
3199 bfdsec = sec->the_bfd_section;
3200 if (!section_is_overlay (bfdsec))
3201 continue; /* not an overlay section */
3203 /* Mark the overlay as "mapped" */
3204 sec->ovly_mapped = 1;
3206 /* Next, make a pass and unmap any sections that are
3207 overlapped by this new section: */
3208 ALL_OBJSECTIONS (objfile2, sec2)
3209 if (sec2->ovly_mapped
3211 && sec->the_bfd_section != sec2->the_bfd_section
3212 && sections_overlap (sec->the_bfd_section,
3213 sec2->the_bfd_section))
3216 printf_filtered ("Note: section %s unmapped by overlap\n",
3217 bfd_section_name (objfile->obfd,
3218 sec2->the_bfd_section));
3219 sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2 */
3223 error ("No overlay section called %s", args);
3226 /* Function: unmap_overlay_command
3227 Mark the overlay section as unmapped
3228 (ie. resident in its LMA address range, rather than the VMA range). */
3231 unmap_overlay_command (char *args, int from_tty)
3233 struct objfile *objfile;
3234 struct obj_section *sec;
3236 if (!overlay_debugging)
3238 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3239 the 'overlay manual' command.");
3241 if (args == 0 || *args == 0)
3242 error ("Argument required: name of an overlay section");
3244 /* First, find a section matching the user supplied argument */
3245 ALL_OBJSECTIONS (objfile, sec)
3246 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
3248 if (!sec->ovly_mapped)
3249 error ("Section %s is not mapped", args);
3250 sec->ovly_mapped = 0;
3253 error ("No overlay section called %s", args);
3256 /* Function: overlay_auto_command
3257 A utility command to turn on overlay debugging.
3258 Possibly this should be done via a set/show command. */
3261 overlay_auto_command (char *args, int from_tty)
3263 overlay_debugging = ovly_auto;
3264 enable_overlay_breakpoints ();
3266 printf_filtered ("Automatic overlay debugging enabled.");
3269 /* Function: overlay_manual_command
3270 A utility command to turn on overlay debugging.
3271 Possibly this should be done via a set/show command. */
3274 overlay_manual_command (char *args, int from_tty)
3276 overlay_debugging = ovly_on;
3277 disable_overlay_breakpoints ();
3279 printf_filtered ("Overlay debugging enabled.");
3282 /* Function: overlay_off_command
3283 A utility command to turn on overlay debugging.
3284 Possibly this should be done via a set/show command. */
3287 overlay_off_command (char *args, int from_tty)
3289 overlay_debugging = ovly_off;
3290 disable_overlay_breakpoints ();
3292 printf_filtered ("Overlay debugging disabled.");
3296 overlay_load_command (char *args, int from_tty)
3298 if (target_overlay_update)
3299 (*target_overlay_update) (NULL);
3301 error ("This target does not know how to read its overlay state.");
3304 /* Function: overlay_command
3305 A place-holder for a mis-typed command */
3307 /* Command list chain containing all defined "overlay" subcommands. */
3308 struct cmd_list_element *overlaylist;
3311 overlay_command (char *args, int from_tty)
3314 ("\"overlay\" must be followed by the name of an overlay command.\n");
3315 help_list (overlaylist, "overlay ", -1, gdb_stdout);
3319 /* Target Overlays for the "Simplest" overlay manager:
3321 This is GDB's default target overlay layer. It works with the
3322 minimal overlay manager supplied as an example by Cygnus. The
3323 entry point is via a function pointer "target_overlay_update",
3324 so targets that use a different runtime overlay manager can
3325 substitute their own overlay_update function and take over the
3328 The overlay_update function pokes around in the target's data structures
3329 to see what overlays are mapped, and updates GDB's overlay mapping with
3332 In this simple implementation, the target data structures are as follows:
3333 unsigned _novlys; /# number of overlay sections #/
3334 unsigned _ovly_table[_novlys][4] = {
3335 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3336 {..., ..., ..., ...},
3338 unsigned _novly_regions; /# number of overlay regions #/
3339 unsigned _ovly_region_table[_novly_regions][3] = {
3340 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3343 These functions will attempt to update GDB's mappedness state in the
3344 symbol section table, based on the target's mappedness state.
3346 To do this, we keep a cached copy of the target's _ovly_table, and
3347 attempt to detect when the cached copy is invalidated. The main
3348 entry point is "simple_overlay_update(SECT), which looks up SECT in
3349 the cached table and re-reads only the entry for that section from
3350 the target (whenever possible).
3353 /* Cached, dynamically allocated copies of the target data structures: */
3354 static unsigned (*cache_ovly_table)[4] = 0;
3356 static unsigned (*cache_ovly_region_table)[3] = 0;
3358 static unsigned cache_novlys = 0;
3360 static unsigned cache_novly_regions = 0;
3362 static CORE_ADDR cache_ovly_table_base = 0;
3364 static CORE_ADDR cache_ovly_region_table_base = 0;
3368 VMA, SIZE, LMA, MAPPED
3370 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
3372 /* Throw away the cached copy of _ovly_table */
3374 simple_free_overlay_table (void)
3376 if (cache_ovly_table)
3377 xfree (cache_ovly_table);
3379 cache_ovly_table = NULL;
3380 cache_ovly_table_base = 0;
3384 /* Throw away the cached copy of _ovly_region_table */
3386 simple_free_overlay_region_table (void)
3388 if (cache_ovly_region_table)
3389 xfree (cache_ovly_region_table);
3390 cache_novly_regions = 0;
3391 cache_ovly_region_table = NULL;
3392 cache_ovly_region_table_base = 0;
3396 /* Read an array of ints from the target into a local buffer.
3397 Convert to host order. int LEN is number of ints */
3399 read_target_long_array (CORE_ADDR memaddr, unsigned int *myaddr, int len)
3401 /* FIXME (alloca): Not safe if array is very large. */
3402 char *buf = alloca (len * TARGET_LONG_BYTES);
3405 read_memory (memaddr, buf, len * TARGET_LONG_BYTES);
3406 for (i = 0; i < len; i++)
3407 myaddr[i] = extract_unsigned_integer (TARGET_LONG_BYTES * i + buf,
3411 /* Find and grab a copy of the target _ovly_table
3412 (and _novlys, which is needed for the table's size) */
3414 simple_read_overlay_table (void)
3416 struct minimal_symbol *novlys_msym, *ovly_table_msym;
3418 simple_free_overlay_table ();
3419 novlys_msym = lookup_minimal_symbol ("_novlys", NULL, NULL);
3422 error ("Error reading inferior's overlay table: "
3423 "couldn't find `_novlys' variable\n"
3424 "in inferior. Use `overlay manual' mode.");
3428 ovly_table_msym = lookup_minimal_symbol ("_ovly_table", NULL, NULL);
3429 if (! ovly_table_msym)
3431 error ("Error reading inferior's overlay table: couldn't find "
3432 "`_ovly_table' array\n"
3433 "in inferior. Use `overlay manual' mode.");
3437 cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym), 4);
3439 = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table));
3440 cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (ovly_table_msym);
3441 read_target_long_array (cache_ovly_table_base,
3442 (int *) cache_ovly_table,
3445 return 1; /* SUCCESS */
3449 /* Find and grab a copy of the target _ovly_region_table
3450 (and _novly_regions, which is needed for the table's size) */
3452 simple_read_overlay_region_table (void)
3454 struct minimal_symbol *msym;
3456 simple_free_overlay_region_table ();
3457 msym = lookup_minimal_symbol ("_novly_regions", NULL, NULL);
3459 cache_novly_regions = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4);
3461 return 0; /* failure */
3462 cache_ovly_region_table = (void *) xmalloc (cache_novly_regions * 12);
3463 if (cache_ovly_region_table != NULL)
3465 msym = lookup_minimal_symbol ("_ovly_region_table", NULL, NULL);
3468 cache_ovly_region_table_base = SYMBOL_VALUE_ADDRESS (msym);
3469 read_target_long_array (cache_ovly_region_table_base,
3470 (int *) cache_ovly_region_table,
3471 cache_novly_regions * 3);
3474 return 0; /* failure */
3477 return 0; /* failure */
3478 return 1; /* SUCCESS */
3482 /* Function: simple_overlay_update_1
3483 A helper function for simple_overlay_update. Assuming a cached copy
3484 of _ovly_table exists, look through it to find an entry whose vma,
3485 lma and size match those of OSECT. Re-read the entry and make sure
3486 it still matches OSECT (else the table may no longer be valid).
3487 Set OSECT's mapped state to match the entry. Return: 1 for
3488 success, 0 for failure. */
3491 simple_overlay_update_1 (struct obj_section *osect)
3494 bfd *obfd = osect->objfile->obfd;
3495 asection *bsect = osect->the_bfd_section;
3497 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
3498 for (i = 0; i < cache_novlys; i++)
3499 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3500 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3501 /* && cache_ovly_table[i][SIZE] == size */ )
3503 read_target_long_array (cache_ovly_table_base + i * TARGET_LONG_BYTES,
3504 (int *) cache_ovly_table[i], 4);
3505 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3506 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3507 /* && cache_ovly_table[i][SIZE] == size */ )
3509 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3512 else /* Warning! Warning! Target's ovly table has changed! */
3518 /* Function: simple_overlay_update
3519 If OSECT is NULL, then update all sections' mapped state
3520 (after re-reading the entire target _ovly_table).
3521 If OSECT is non-NULL, then try to find a matching entry in the
3522 cached ovly_table and update only OSECT's mapped state.
3523 If a cached entry can't be found or the cache isn't valid, then
3524 re-read the entire cache, and go ahead and update all sections. */
3527 simple_overlay_update (struct obj_section *osect)
3529 struct objfile *objfile;
3531 /* Were we given an osect to look up? NULL means do all of them. */
3533 /* Have we got a cached copy of the target's overlay table? */
3534 if (cache_ovly_table != NULL)
3535 /* Does its cached location match what's currently in the symtab? */
3536 if (cache_ovly_table_base ==
3537 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL, NULL)))
3538 /* Then go ahead and try to look up this single section in the cache */
3539 if (simple_overlay_update_1 (osect))
3540 /* Found it! We're done. */
3543 /* Cached table no good: need to read the entire table anew.
3544 Or else we want all the sections, in which case it's actually
3545 more efficient to read the whole table in one block anyway. */
3547 if (! simple_read_overlay_table ())
3550 /* Now may as well update all sections, even if only one was requested. */
3551 ALL_OBJSECTIONS (objfile, osect)
3552 if (section_is_overlay (osect->the_bfd_section))
3555 bfd *obfd = osect->objfile->obfd;
3556 asection *bsect = osect->the_bfd_section;
3558 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
3559 for (i = 0; i < cache_novlys; i++)
3560 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3561 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3562 /* && cache_ovly_table[i][SIZE] == size */ )
3563 { /* obj_section matches i'th entry in ovly_table */
3564 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3565 break; /* finished with inner for loop: break out */
3572 _initialize_symfile (void)
3574 struct cmd_list_element *c;
3576 c = add_cmd ("symbol-file", class_files, symbol_file_command,
3577 "Load symbol table from executable file FILE.\n\
3578 The `file' command can also load symbol tables, as well as setting the file\n\
3579 to execute.", &cmdlist);
3580 set_cmd_completer (c, filename_completer);
3582 c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command,
3583 "Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3584 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3585 ADDR is the starting address of the file's text.\n\
3586 The optional arguments are section-name section-address pairs and\n\
3587 should be specified if the data and bss segments are not contiguous\n\
3588 with the text. SECT is a section name to be loaded at SECT_ADDR.",
3590 set_cmd_completer (c, filename_completer);
3592 c = add_cmd ("add-shared-symbol-files", class_files,
3593 add_shared_symbol_files_command,
3594 "Load the symbols from shared objects in the dynamic linker's link map.",
3596 c = add_alias_cmd ("assf", "add-shared-symbol-files", class_files, 1,
3599 c = add_cmd ("load", class_files, load_command,
3600 "Dynamically load FILE into the running program, and record its symbols\n\
3601 for access from GDB.", &cmdlist);
3602 set_cmd_completer (c, filename_completer);
3605 (add_set_cmd ("symbol-reloading", class_support, var_boolean,
3606 (char *) &symbol_reloading,
3607 "Set dynamic symbol table reloading multiple times in one run.",
3611 add_prefix_cmd ("overlay", class_support, overlay_command,
3612 "Commands for debugging overlays.", &overlaylist,
3613 "overlay ", 0, &cmdlist);
3615 add_com_alias ("ovly", "overlay", class_alias, 1);
3616 add_com_alias ("ov", "overlay", class_alias, 1);
3618 add_cmd ("map-overlay", class_support, map_overlay_command,
3619 "Assert that an overlay section is mapped.", &overlaylist);
3621 add_cmd ("unmap-overlay", class_support, unmap_overlay_command,
3622 "Assert that an overlay section is unmapped.", &overlaylist);
3624 add_cmd ("list-overlays", class_support, list_overlays_command,
3625 "List mappings of overlay sections.", &overlaylist);
3627 add_cmd ("manual", class_support, overlay_manual_command,
3628 "Enable overlay debugging.", &overlaylist);
3629 add_cmd ("off", class_support, overlay_off_command,
3630 "Disable overlay debugging.", &overlaylist);
3631 add_cmd ("auto", class_support, overlay_auto_command,
3632 "Enable automatic overlay debugging.", &overlaylist);
3633 add_cmd ("load-target", class_support, overlay_load_command,
3634 "Read the overlay mapping state from the target.", &overlaylist);
3636 /* Filename extension to source language lookup table: */
3637 init_filename_language_table ();
3638 c = add_set_cmd ("extension-language", class_files, var_string_noescape,
3640 "Set mapping between filename extension and source language.\n\
3641 Usage: set extension-language .foo bar",
3643 set_cmd_cfunc (c, set_ext_lang_command);
3645 add_info ("extensions", info_ext_lang_command,
3646 "All filename extensions associated with a source language.");
3649 (add_set_cmd ("download-write-size", class_obscure,
3650 var_integer, (char *) &download_write_size,
3651 "Set the write size used when downloading a program.\n"
3652 "Only used when downloading a program onto a remote\n"
3653 "target. Specify zero, or a negative value, to disable\n"
3654 "blocked writes. The actual size of each transfer is also\n"
3655 "limited by the size of the target packet and the memory\n"
3660 debug_file_directory = xstrdup (DEBUGDIR);
3662 ("debug-file-directory", class_support, var_string,
3663 (char *) &debug_file_directory,
3664 "Set the directory where separate debug symbols are searched for.\n"
3665 "Separate debug symbols are first searched for in the same\n"
3666 "directory as the binary, then in the `" DEBUG_SUBDIRECTORY
3668 "and lastly at the path of the directory of the binary with\n"
3669 "the global debug-file directory prepended\n",
3671 add_show_from_set (c, &showlist);
3672 set_cmd_completer (c, filename_completer);