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 /* Don't allow char * to have a typename (else would get caddr_t).
812 Ditto void *. FIXME: Check whether this is now done by all the
813 symbol readers themselves (many of them now do), and if so remove
816 TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0;
817 TYPE_NAME (lookup_pointer_type (builtin_type_void)) = 0;
819 /* Mark the objfile has having had initial symbol read attempted. Note
820 that this does not mean we found any symbols... */
822 objfile->flags |= OBJF_SYMS;
824 /* Discard cleanups as symbol reading was successful. */
826 discard_cleanups (old_chain);
828 /* Call this after reading in a new symbol table to give target
829 dependent code a crack at the new symbols. For instance, this
830 could be used to update the values of target-specific symbols GDB
831 needs to keep track of (such as _sigtramp, or whatever). */
833 TARGET_SYMFILE_POSTREAD (objfile);
836 /* Perform required actions after either reading in the initial
837 symbols for a new objfile, or mapping in the symbols from a reusable
841 new_symfile_objfile (struct objfile *objfile, int mainline, int verbo)
844 /* If this is the main symbol file we have to clean up all users of the
845 old main symbol file. Otherwise it is sufficient to fixup all the
846 breakpoints that may have been redefined by this symbol file. */
849 /* OK, make it the "real" symbol file. */
850 symfile_objfile = objfile;
852 clear_symtab_users ();
856 breakpoint_re_set ();
859 /* We're done reading the symbol file; finish off complaints. */
860 clear_complaints (&symfile_complaints, 0, verbo);
863 /* Process a symbol file, as either the main file or as a dynamically
866 NAME is the file name (which will be tilde-expanded and made
867 absolute herein) (but we don't free or modify NAME itself).
869 FROM_TTY says how verbose to be.
871 MAINLINE specifies whether this is the main symbol file, or whether
872 it's an extra symbol file such as dynamically loaded code.
874 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
875 syms_from_objfile, above. ADDRS is ignored when MAINLINE is
878 Upon success, returns a pointer to the objfile that was added.
879 Upon failure, jumps back to command level (never returns). */
880 static struct objfile *
881 symbol_file_add_with_addrs_or_offsets (char *name, int from_tty,
882 struct section_addr_info *addrs,
883 struct section_offsets *offsets,
885 int mainline, int flags)
887 struct objfile *objfile;
888 struct partial_symtab *psymtab;
891 struct section_addr_info orig_addrs;
896 /* Open a bfd for the file, and give user a chance to burp if we'd be
897 interactively wiping out any existing symbols. */
899 abfd = symfile_bfd_open (name);
901 if ((have_full_symbols () || have_partial_symbols ())
904 && !query ("Load new symbol table from \"%s\"? ", name))
905 error ("Not confirmed.");
907 objfile = allocate_objfile (abfd, flags);
909 /* If the objfile uses a mapped symbol file, and we have a psymtab for
910 it, then skip reading any symbols at this time. */
912 if ((objfile->flags & OBJF_MAPPED) && (objfile->flags & OBJF_SYMS))
914 /* We mapped in an existing symbol table file that already has had
915 initial symbol reading performed, so we can skip that part. Notify
916 the user that instead of reading the symbols, they have been mapped.
918 if (from_tty || info_verbose)
920 printf_filtered ("Mapped symbols for %s...", name);
922 gdb_flush (gdb_stdout);
924 init_entry_point_info (objfile);
925 find_sym_fns (objfile);
929 /* We either created a new mapped symbol table, mapped an existing
930 symbol table file which has not had initial symbol reading
931 performed, or need to read an unmapped symbol table. */
932 if (from_tty || info_verbose)
934 if (pre_add_symbol_hook)
935 pre_add_symbol_hook (name);
938 printf_filtered ("Reading symbols from %s...", name);
940 gdb_flush (gdb_stdout);
943 syms_from_objfile (objfile, addrs, offsets, num_offsets,
947 /* We now have at least a partial symbol table. Check to see if the
948 user requested that all symbols be read on initial access via either
949 the gdb startup command line or on a per symbol file basis. Expand
950 all partial symbol tables for this objfile if so. */
952 if ((flags & OBJF_READNOW) || readnow_symbol_files)
954 if (from_tty || info_verbose)
956 printf_filtered ("expanding to full symbols...");
958 gdb_flush (gdb_stdout);
961 for (psymtab = objfile->psymtabs;
963 psymtab = psymtab->next)
965 psymtab_to_symtab (psymtab);
969 debugfile = find_separate_debug_file (objfile);
974 objfile->separate_debug_objfile
975 = symbol_file_add (debugfile, from_tty, &orig_addrs, 0, flags);
979 objfile->separate_debug_objfile
980 = symbol_file_add (debugfile, from_tty, NULL, 0, flags);
982 objfile->separate_debug_objfile->separate_debug_objfile_backlink
985 /* Put the separate debug object before the normal one, this is so that
986 usage of the ALL_OBJFILES_SAFE macro will stay safe. */
987 put_objfile_before (objfile->separate_debug_objfile, objfile);
992 if (!have_partial_symbols () && !have_full_symbols ())
995 printf_filtered ("(no debugging symbols found)...");
999 if (from_tty || info_verbose)
1001 if (post_add_symbol_hook)
1002 post_add_symbol_hook ();
1005 printf_filtered ("done.\n");
1009 /* We print some messages regardless of whether 'from_tty ||
1010 info_verbose' is true, so make sure they go out at the right
1012 gdb_flush (gdb_stdout);
1014 if (objfile->sf == NULL)
1015 return objfile; /* No symbols. */
1017 new_symfile_objfile (objfile, mainline, from_tty);
1019 if (target_new_objfile_hook)
1020 target_new_objfile_hook (objfile);
1026 /* Process a symbol file, as either the main file or as a dynamically
1027 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
1030 symbol_file_add (char *name, int from_tty, struct section_addr_info *addrs,
1031 int mainline, int flags)
1033 return symbol_file_add_with_addrs_or_offsets (name, from_tty, addrs, 0, 0,
1038 /* Call symbol_file_add() with default values and update whatever is
1039 affected by the loading of a new main().
1040 Used when the file is supplied in the gdb command line
1041 and by some targets with special loading requirements.
1042 The auxiliary function, symbol_file_add_main_1(), has the flags
1043 argument for the switches that can only be specified in the symbol_file
1047 symbol_file_add_main (char *args, int from_tty)
1049 symbol_file_add_main_1 (args, from_tty, 0);
1053 symbol_file_add_main_1 (char *args, int from_tty, int flags)
1055 symbol_file_add (args, from_tty, NULL, 1, flags);
1058 RESET_HP_UX_GLOBALS ();
1061 /* Getting new symbols may change our opinion about
1062 what is frameless. */
1063 reinit_frame_cache ();
1065 set_initial_language ();
1069 symbol_file_clear (int from_tty)
1071 if ((have_full_symbols () || have_partial_symbols ())
1073 && !query ("Discard symbol table from `%s'? ",
1074 symfile_objfile->name))
1075 error ("Not confirmed.");
1076 free_all_objfiles ();
1078 /* solib descriptors may have handles to objfiles. Since their
1079 storage has just been released, we'd better wipe the solib
1080 descriptors as well.
1082 #if defined(SOLIB_RESTART)
1086 symfile_objfile = NULL;
1088 printf_unfiltered ("No symbol file now.\n");
1090 RESET_HP_UX_GLOBALS ();
1095 get_debug_link_info (struct objfile *objfile, unsigned long *crc32_out)
1098 bfd_size_type debuglink_size;
1099 unsigned long crc32;
1104 sect = bfd_get_section_by_name (objfile->obfd, ".gnu_debuglink");
1109 debuglink_size = bfd_section_size (objfile->obfd, sect);
1111 contents = xmalloc (debuglink_size);
1112 bfd_get_section_contents (objfile->obfd, sect, contents,
1113 (file_ptr)0, (bfd_size_type)debuglink_size);
1115 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1116 crc_offset = strlen (contents) + 1;
1117 crc_offset = (crc_offset + 3) & ~3;
1119 crc32 = bfd_get_32 (objfile->obfd, (bfd_byte *) (contents + crc_offset));
1126 separate_debug_file_exists (const char *name, unsigned long crc)
1128 unsigned long file_crc = 0;
1130 char buffer[8*1024];
1133 fd = open (name, O_RDONLY | O_BINARY);
1137 while ((count = read (fd, buffer, sizeof (buffer))) > 0)
1138 file_crc = gnu_debuglink_crc32 (file_crc, buffer, count);
1142 return crc == file_crc;
1145 static char *debug_file_directory = NULL;
1147 #if ! defined (DEBUG_SUBDIRECTORY)
1148 #define DEBUG_SUBDIRECTORY ".debug"
1152 find_separate_debug_file (struct objfile *objfile)
1159 bfd_size_type debuglink_size;
1160 unsigned long crc32;
1163 basename = get_debug_link_info (objfile, &crc32);
1165 if (basename == NULL)
1168 dir = xstrdup (objfile->name);
1170 /* Strip off the final filename part, leaving the directory name,
1171 followed by a slash. Objfile names should always be absolute and
1172 tilde-expanded, so there should always be a slash in there
1174 for (i = strlen(dir) - 1; i >= 0; i--)
1176 if (IS_DIR_SEPARATOR (dir[i]))
1179 gdb_assert (i >= 0 && IS_DIR_SEPARATOR (dir[i]));
1182 debugfile = alloca (strlen (debug_file_directory) + 1
1184 + strlen (DEBUG_SUBDIRECTORY)
1189 /* First try in the same directory as the original file. */
1190 strcpy (debugfile, dir);
1191 strcat (debugfile, basename);
1193 if (separate_debug_file_exists (debugfile, crc32))
1197 return xstrdup (debugfile);
1200 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1201 strcpy (debugfile, dir);
1202 strcat (debugfile, DEBUG_SUBDIRECTORY);
1203 strcat (debugfile, "/");
1204 strcat (debugfile, basename);
1206 if (separate_debug_file_exists (debugfile, crc32))
1210 return xstrdup (debugfile);
1213 /* Then try in the global debugfile directory. */
1214 strcpy (debugfile, debug_file_directory);
1215 strcat (debugfile, "/");
1216 strcat (debugfile, dir);
1217 strcat (debugfile, basename);
1219 if (separate_debug_file_exists (debugfile, crc32))
1223 return xstrdup (debugfile);
1232 /* This is the symbol-file command. Read the file, analyze its
1233 symbols, and add a struct symtab to a symtab list. The syntax of
1234 the command is rather bizarre--(1) buildargv implements various
1235 quoting conventions which are undocumented and have little or
1236 nothing in common with the way things are quoted (or not quoted)
1237 elsewhere in GDB, (2) options are used, which are not generally
1238 used in GDB (perhaps "set mapped on", "set readnow on" would be
1239 better), (3) the order of options matters, which is contrary to GNU
1240 conventions (because it is confusing and inconvenient). */
1241 /* Note: ezannoni 2000-04-17. This function used to have support for
1242 rombug (see remote-os9k.c). It consisted of a call to target_link()
1243 (target.c) to get the address of the text segment from the target,
1244 and pass that to symbol_file_add(). This is no longer supported. */
1247 symbol_file_command (char *args, int from_tty)
1251 struct cleanup *cleanups;
1252 int flags = OBJF_USERLOADED;
1258 symbol_file_clear (from_tty);
1262 if ((argv = buildargv (args)) == NULL)
1266 cleanups = make_cleanup_freeargv (argv);
1267 while (*argv != NULL)
1269 if (STREQ (*argv, "-mapped"))
1270 flags |= OBJF_MAPPED;
1272 if (STREQ (*argv, "-readnow"))
1273 flags |= OBJF_READNOW;
1276 error ("unknown option `%s'", *argv);
1281 symbol_file_add_main_1 (name, from_tty, flags);
1288 error ("no symbol file name was specified");
1290 do_cleanups (cleanups);
1294 /* Set the initial language.
1296 A better solution would be to record the language in the psymtab when reading
1297 partial symbols, and then use it (if known) to set the language. This would
1298 be a win for formats that encode the language in an easily discoverable place,
1299 such as DWARF. For stabs, we can jump through hoops looking for specially
1300 named symbols or try to intuit the language from the specific type of stabs
1301 we find, but we can't do that until later when we read in full symbols.
1305 set_initial_language (void)
1307 struct partial_symtab *pst;
1308 enum language lang = language_unknown;
1310 pst = find_main_psymtab ();
1313 if (pst->filename != NULL)
1315 lang = deduce_language_from_filename (pst->filename);
1317 if (lang == language_unknown)
1319 /* Make C the default language */
1322 set_language (lang);
1323 expected_language = current_language; /* Don't warn the user */
1327 /* Open file specified by NAME and hand it off to BFD for preliminary
1328 analysis. Result is a newly initialized bfd *, which includes a newly
1329 malloc'd` copy of NAME (tilde-expanded and made absolute).
1330 In case of trouble, error() is called. */
1333 symfile_bfd_open (char *name)
1337 char *absolute_name;
1341 name = tilde_expand (name); /* Returns 1st new malloc'd copy */
1343 /* Look down path for it, allocate 2nd new malloc'd copy. */
1344 desc = openp (getenv ("PATH"), 1, name, O_RDONLY | O_BINARY, 0, &absolute_name);
1345 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1348 char *exename = alloca (strlen (name) + 5);
1349 strcat (strcpy (exename, name), ".exe");
1350 desc = openp (getenv ("PATH"), 1, exename, O_RDONLY | O_BINARY,
1356 make_cleanup (xfree, name);
1357 perror_with_name (name);
1359 xfree (name); /* Free 1st new malloc'd copy */
1360 name = absolute_name; /* Keep 2nd malloc'd copy in bfd */
1361 /* It'll be freed in free_objfile(). */
1363 sym_bfd = bfd_fdopenr (name, gnutarget, desc);
1367 make_cleanup (xfree, name);
1368 error ("\"%s\": can't open to read symbols: %s.", name,
1369 bfd_errmsg (bfd_get_error ()));
1371 sym_bfd->cacheable = 1;
1373 if (!bfd_check_format (sym_bfd, bfd_object))
1375 /* FIXME: should be checking for errors from bfd_close (for one thing,
1376 on error it does not free all the storage associated with the
1378 bfd_close (sym_bfd); /* This also closes desc */
1379 make_cleanup (xfree, name);
1380 error ("\"%s\": can't read symbols: %s.", name,
1381 bfd_errmsg (bfd_get_error ()));
1386 /* Return the section index for the given section name. Return -1 if
1387 the section was not found. */
1389 get_section_index (struct objfile *objfile, char *section_name)
1391 asection *sect = bfd_get_section_by_name (objfile->obfd, section_name);
1398 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1399 startup by the _initialize routine in each object file format reader,
1400 to register information about each format the the reader is prepared
1404 add_symtab_fns (struct sym_fns *sf)
1406 sf->next = symtab_fns;
1411 /* Initialize to read symbols from the symbol file sym_bfd. It either
1412 returns or calls error(). The result is an initialized struct sym_fns
1413 in the objfile structure, that contains cached information about the
1417 find_sym_fns (struct objfile *objfile)
1420 enum bfd_flavour our_flavour = bfd_get_flavour (objfile->obfd);
1421 char *our_target = bfd_get_target (objfile->obfd);
1423 if (our_flavour == bfd_target_srec_flavour
1424 || our_flavour == bfd_target_ihex_flavour
1425 || our_flavour == bfd_target_tekhex_flavour)
1426 return; /* No symbols. */
1428 /* Special kludge for apollo. See dstread.c. */
1429 if (STREQN (our_target, "apollo", 6))
1430 our_flavour = (enum bfd_flavour) -2;
1432 for (sf = symtab_fns; sf != NULL; sf = sf->next)
1434 if (our_flavour == sf->sym_flavour)
1440 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
1441 bfd_get_target (objfile->obfd));
1444 /* This function runs the load command of our current target. */
1447 load_command (char *arg, int from_tty)
1450 arg = get_exec_file (1);
1451 target_load (arg, from_tty);
1453 /* After re-loading the executable, we don't really know which
1454 overlays are mapped any more. */
1455 overlay_cache_invalid = 1;
1458 /* This version of "load" should be usable for any target. Currently
1459 it is just used for remote targets, not inftarg.c or core files,
1460 on the theory that only in that case is it useful.
1462 Avoiding xmodem and the like seems like a win (a) because we don't have
1463 to worry about finding it, and (b) On VMS, fork() is very slow and so
1464 we don't want to run a subprocess. On the other hand, I'm not sure how
1465 performance compares. */
1467 static int download_write_size = 512;
1468 static int validate_download = 0;
1470 /* Callback service function for generic_load (bfd_map_over_sections). */
1473 add_section_size_callback (bfd *abfd, asection *asec, void *data)
1475 bfd_size_type *sum = data;
1477 *sum += bfd_get_section_size_before_reloc (asec);
1480 /* Opaque data for load_section_callback. */
1481 struct load_section_data {
1482 unsigned long load_offset;
1483 unsigned long write_count;
1484 unsigned long data_count;
1485 bfd_size_type total_size;
1488 /* Callback service function for generic_load (bfd_map_over_sections). */
1491 load_section_callback (bfd *abfd, asection *asec, void *data)
1493 struct load_section_data *args = data;
1495 if (bfd_get_section_flags (abfd, asec) & SEC_LOAD)
1497 bfd_size_type size = bfd_get_section_size_before_reloc (asec);
1501 struct cleanup *old_chain;
1502 CORE_ADDR lma = bfd_section_lma (abfd, asec) + args->load_offset;
1503 bfd_size_type block_size;
1505 const char *sect_name = bfd_get_section_name (abfd, asec);
1508 if (download_write_size > 0 && size > download_write_size)
1509 block_size = download_write_size;
1513 buffer = xmalloc (size);
1514 old_chain = make_cleanup (xfree, buffer);
1516 /* Is this really necessary? I guess it gives the user something
1517 to look at during a long download. */
1518 ui_out_message (uiout, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1519 sect_name, paddr_nz (size), paddr_nz (lma));
1521 bfd_get_section_contents (abfd, asec, buffer, 0, size);
1527 bfd_size_type this_transfer = size - sent;
1529 if (this_transfer >= block_size)
1530 this_transfer = block_size;
1531 len = target_write_memory_partial (lma, buffer,
1532 this_transfer, &err);
1535 if (validate_download)
1537 /* Broken memories and broken monitors manifest
1538 themselves here when bring new computers to
1539 life. This doubles already slow downloads. */
1540 /* NOTE: cagney/1999-10-18: A more efficient
1541 implementation might add a verify_memory()
1542 method to the target vector and then use
1543 that. remote.c could implement that method
1544 using the ``qCRC'' packet. */
1545 char *check = xmalloc (len);
1546 struct cleanup *verify_cleanups =
1547 make_cleanup (xfree, check);
1549 if (target_read_memory (lma, check, len) != 0)
1550 error ("Download verify read failed at 0x%s",
1552 if (memcmp (buffer, check, len) != 0)
1553 error ("Download verify compare failed at 0x%s",
1555 do_cleanups (verify_cleanups);
1557 args->data_count += len;
1560 args->write_count += 1;
1563 || (ui_load_progress_hook != NULL
1564 && ui_load_progress_hook (sect_name, sent)))
1565 error ("Canceled the download");
1567 if (show_load_progress != NULL)
1568 show_load_progress (sect_name, sent, size,
1569 args->data_count, args->total_size);
1571 while (sent < size);
1574 error ("Memory access error while loading section %s.", sect_name);
1576 do_cleanups (old_chain);
1582 generic_load (char *args, int from_tty)
1586 time_t start_time, end_time; /* Start and end times of download */
1588 struct cleanup *old_cleanups;
1590 struct load_section_data cbdata;
1593 cbdata.load_offset = 0; /* Offset to add to vma for each section. */
1594 cbdata.write_count = 0; /* Number of writes needed. */
1595 cbdata.data_count = 0; /* Number of bytes written to target memory. */
1596 cbdata.total_size = 0; /* Total size of all bfd sectors. */
1598 /* Parse the input argument - the user can specify a load offset as
1599 a second argument. */
1600 filename = xmalloc (strlen (args) + 1);
1601 old_cleanups = make_cleanup (xfree, filename);
1602 strcpy (filename, args);
1603 offptr = strchr (filename, ' ');
1608 cbdata.load_offset = strtoul (offptr, &endptr, 0);
1609 if (offptr == endptr)
1610 error ("Invalid download offset:%s\n", offptr);
1614 cbdata.load_offset = 0;
1616 /* Open the file for loading. */
1617 loadfile_bfd = bfd_openr (filename, gnutarget);
1618 if (loadfile_bfd == NULL)
1620 perror_with_name (filename);
1624 /* FIXME: should be checking for errors from bfd_close (for one thing,
1625 on error it does not free all the storage associated with the
1627 make_cleanup_bfd_close (loadfile_bfd);
1629 if (!bfd_check_format (loadfile_bfd, bfd_object))
1631 error ("\"%s\" is not an object file: %s", filename,
1632 bfd_errmsg (bfd_get_error ()));
1635 bfd_map_over_sections (loadfile_bfd, add_section_size_callback,
1636 (void *) &cbdata.total_size);
1638 start_time = time (NULL);
1640 bfd_map_over_sections (loadfile_bfd, load_section_callback, &cbdata);
1642 end_time = time (NULL);
1644 entry = bfd_get_start_address (loadfile_bfd);
1645 ui_out_text (uiout, "Start address ");
1646 ui_out_field_fmt (uiout, "address", "0x%s", paddr_nz (entry));
1647 ui_out_text (uiout, ", load size ");
1648 ui_out_field_fmt (uiout, "load-size", "%lu", cbdata.data_count);
1649 ui_out_text (uiout, "\n");
1650 /* We were doing this in remote-mips.c, I suspect it is right
1651 for other targets too. */
1654 /* FIXME: are we supposed to call symbol_file_add or not? According to
1655 a comment from remote-mips.c (where a call to symbol_file_add was
1656 commented out), making the call confuses GDB if more than one file is
1657 loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c
1660 print_transfer_performance (gdb_stdout, cbdata.data_count,
1661 cbdata.write_count, end_time - start_time);
1663 do_cleanups (old_cleanups);
1666 /* Report how fast the transfer went. */
1668 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1669 replaced by print_transfer_performance (with a very different
1670 function signature). */
1673 report_transfer_performance (unsigned long data_count, time_t start_time,
1676 print_transfer_performance (gdb_stdout, data_count,
1677 end_time - start_time, 0);
1681 print_transfer_performance (struct ui_file *stream,
1682 unsigned long data_count,
1683 unsigned long write_count,
1684 unsigned long time_count)
1686 ui_out_text (uiout, "Transfer rate: ");
1689 ui_out_field_fmt (uiout, "transfer-rate", "%lu",
1690 (data_count * 8) / time_count);
1691 ui_out_text (uiout, " bits/sec");
1695 ui_out_field_fmt (uiout, "transferred-bits", "%lu", (data_count * 8));
1696 ui_out_text (uiout, " bits in <1 sec");
1698 if (write_count > 0)
1700 ui_out_text (uiout, ", ");
1701 ui_out_field_fmt (uiout, "write-rate", "%lu", data_count / write_count);
1702 ui_out_text (uiout, " bytes/write");
1704 ui_out_text (uiout, ".\n");
1707 /* This function allows the addition of incrementally linked object files.
1708 It does not modify any state in the target, only in the debugger. */
1709 /* Note: ezannoni 2000-04-13 This function/command used to have a
1710 special case syntax for the rombug target (Rombug is the boot
1711 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
1712 rombug case, the user doesn't need to supply a text address,
1713 instead a call to target_link() (in target.c) would supply the
1714 value to use. We are now discontinuing this type of ad hoc syntax. */
1718 add_symbol_file_command (char *args, int from_tty)
1720 char *filename = NULL;
1721 int flags = OBJF_USERLOADED;
1723 int expecting_option = 0;
1724 int section_index = 0;
1728 int expecting_sec_name = 0;
1729 int expecting_sec_addr = 0;
1735 } sect_opts[SECT_OFF_MAX];
1737 struct section_addr_info section_addrs;
1738 struct cleanup *my_cleanups = make_cleanup (null_cleanup, NULL);
1743 error ("add-symbol-file takes a file name and an address");
1745 /* Make a copy of the string that we can safely write into. */
1746 args = xstrdup (args);
1748 /* Ensure section_addrs is initialized */
1749 memset (§ion_addrs, 0, sizeof (section_addrs));
1751 while (*args != '\000')
1753 /* Any leading spaces? */
1754 while (isspace (*args))
1757 /* Point arg to the beginning of the argument. */
1760 /* Move args pointer over the argument. */
1761 while ((*args != '\000') && !isspace (*args))
1764 /* If there are more arguments, terminate arg and
1766 if (*args != '\000')
1769 /* Now process the argument. */
1772 /* The first argument is the file name. */
1773 filename = tilde_expand (arg);
1774 make_cleanup (xfree, filename);
1779 /* The second argument is always the text address at which
1780 to load the program. */
1781 sect_opts[section_index].name = ".text";
1782 sect_opts[section_index].value = arg;
1787 /* It's an option (starting with '-') or it's an argument
1792 if (strcmp (arg, "-mapped") == 0)
1793 flags |= OBJF_MAPPED;
1795 if (strcmp (arg, "-readnow") == 0)
1796 flags |= OBJF_READNOW;
1798 if (strcmp (arg, "-s") == 0)
1800 if (section_index >= SECT_OFF_MAX)
1801 error ("Too many sections specified.");
1802 expecting_sec_name = 1;
1803 expecting_sec_addr = 1;
1808 if (expecting_sec_name)
1810 sect_opts[section_index].name = arg;
1811 expecting_sec_name = 0;
1814 if (expecting_sec_addr)
1816 sect_opts[section_index].value = arg;
1817 expecting_sec_addr = 0;
1821 error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*");
1827 /* Print the prompt for the query below. And save the arguments into
1828 a sect_addr_info structure to be passed around to other
1829 functions. We have to split this up into separate print
1830 statements because local_hex_string returns a local static
1833 printf_filtered ("add symbol table from file \"%s\" at\n", filename);
1834 for (i = 0; i < section_index; i++)
1837 char *val = sect_opts[i].value;
1838 char *sec = sect_opts[i].name;
1840 val = sect_opts[i].value;
1841 if (val[0] == '0' && val[1] == 'x')
1842 addr = strtoul (val+2, NULL, 16);
1844 addr = strtoul (val, NULL, 10);
1846 /* Here we store the section offsets in the order they were
1847 entered on the command line. */
1848 section_addrs.other[sec_num].name = sec;
1849 section_addrs.other[sec_num].addr = addr;
1850 printf_filtered ("\t%s_addr = %s\n",
1852 local_hex_string ((unsigned long)addr));
1855 /* The object's sections are initialized when a
1856 call is made to build_objfile_section_table (objfile).
1857 This happens in reread_symbols.
1858 At this point, we don't know what file type this is,
1859 so we can't determine what section names are valid. */
1862 if (from_tty && (!query ("%s", "")))
1863 error ("Not confirmed.");
1865 symbol_file_add (filename, from_tty, §ion_addrs, 0, flags);
1867 /* Getting new symbols may change our opinion about what is
1869 reinit_frame_cache ();
1870 do_cleanups (my_cleanups);
1874 add_shared_symbol_files_command (char *args, int from_tty)
1876 #ifdef ADD_SHARED_SYMBOL_FILES
1877 ADD_SHARED_SYMBOL_FILES (args, from_tty);
1879 error ("This command is not available in this configuration of GDB.");
1883 /* Re-read symbols if a symbol-file has changed. */
1885 reread_symbols (void)
1887 struct objfile *objfile;
1890 struct stat new_statbuf;
1893 /* With the addition of shared libraries, this should be modified,
1894 the load time should be saved in the partial symbol tables, since
1895 different tables may come from different source files. FIXME.
1896 This routine should then walk down each partial symbol table
1897 and see if the symbol table that it originates from has been changed */
1899 for (objfile = object_files; objfile; objfile = objfile->next)
1903 #ifdef IBM6000_TARGET
1904 /* If this object is from a shared library, then you should
1905 stat on the library name, not member name. */
1907 if (objfile->obfd->my_archive)
1908 res = stat (objfile->obfd->my_archive->filename, &new_statbuf);
1911 res = stat (objfile->name, &new_statbuf);
1914 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1915 printf_filtered ("`%s' has disappeared; keeping its symbols.\n",
1919 new_modtime = new_statbuf.st_mtime;
1920 if (new_modtime != objfile->mtime)
1922 struct cleanup *old_cleanups;
1923 struct section_offsets *offsets;
1925 char *obfd_filename;
1927 printf_filtered ("`%s' has changed; re-reading symbols.\n",
1930 /* There are various functions like symbol_file_add,
1931 symfile_bfd_open, syms_from_objfile, etc., which might
1932 appear to do what we want. But they have various other
1933 effects which we *don't* want. So we just do stuff
1934 ourselves. We don't worry about mapped files (for one thing,
1935 any mapped file will be out of date). */
1937 /* If we get an error, blow away this objfile (not sure if
1938 that is the correct response for things like shared
1940 old_cleanups = make_cleanup_free_objfile (objfile);
1941 /* We need to do this whenever any symbols go away. */
1942 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
1944 /* Clean up any state BFD has sitting around. We don't need
1945 to close the descriptor but BFD lacks a way of closing the
1946 BFD without closing the descriptor. */
1947 obfd_filename = bfd_get_filename (objfile->obfd);
1948 if (!bfd_close (objfile->obfd))
1949 error ("Can't close BFD for %s: %s", objfile->name,
1950 bfd_errmsg (bfd_get_error ()));
1951 objfile->obfd = bfd_openr (obfd_filename, gnutarget);
1952 if (objfile->obfd == NULL)
1953 error ("Can't open %s to read symbols.", objfile->name);
1954 /* bfd_openr sets cacheable to true, which is what we want. */
1955 if (!bfd_check_format (objfile->obfd, bfd_object))
1956 error ("Can't read symbols from %s: %s.", objfile->name,
1957 bfd_errmsg (bfd_get_error ()));
1959 /* Save the offsets, we will nuke them with the rest of the
1961 num_offsets = objfile->num_sections;
1962 offsets = (struct section_offsets *) alloca (SIZEOF_SECTION_OFFSETS);
1963 memcpy (offsets, objfile->section_offsets, SIZEOF_SECTION_OFFSETS);
1965 /* Nuke all the state that we will re-read. Much of the following
1966 code which sets things to NULL really is necessary to tell
1967 other parts of GDB that there is nothing currently there. */
1969 /* FIXME: Do we have to free a whole linked list, or is this
1971 if (objfile->global_psymbols.list)
1972 xmfree (objfile->md, objfile->global_psymbols.list);
1973 memset (&objfile->global_psymbols, 0,
1974 sizeof (objfile->global_psymbols));
1975 if (objfile->static_psymbols.list)
1976 xmfree (objfile->md, objfile->static_psymbols.list);
1977 memset (&objfile->static_psymbols, 0,
1978 sizeof (objfile->static_psymbols));
1980 /* Free the obstacks for non-reusable objfiles */
1981 bcache_xfree (objfile->psymbol_cache);
1982 objfile->psymbol_cache = bcache_xmalloc ();
1983 bcache_xfree (objfile->macro_cache);
1984 objfile->macro_cache = bcache_xmalloc ();
1985 obstack_free (&objfile->psymbol_obstack, 0);
1986 obstack_free (&objfile->symbol_obstack, 0);
1987 obstack_free (&objfile->type_obstack, 0);
1988 objfile->sections = NULL;
1989 objfile->symtabs = NULL;
1990 objfile->psymtabs = NULL;
1991 objfile->free_psymtabs = NULL;
1992 objfile->msymbols = NULL;
1993 objfile->minimal_symbol_count = 0;
1994 memset (&objfile->msymbol_hash, 0,
1995 sizeof (objfile->msymbol_hash));
1996 memset (&objfile->msymbol_demangled_hash, 0,
1997 sizeof (objfile->msymbol_demangled_hash));
1998 objfile->fundamental_types = NULL;
1999 if (objfile->sf != NULL)
2001 (*objfile->sf->sym_finish) (objfile);
2004 /* We never make this a mapped file. */
2006 /* obstack_specify_allocation also initializes the obstack so
2008 objfile->psymbol_cache = bcache_xmalloc ();
2009 objfile->macro_cache = bcache_xmalloc ();
2010 obstack_specify_allocation (&objfile->psymbol_obstack, 0, 0,
2012 obstack_specify_allocation (&objfile->symbol_obstack, 0, 0,
2014 obstack_specify_allocation (&objfile->type_obstack, 0, 0,
2016 if (build_objfile_section_table (objfile))
2018 error ("Can't find the file sections in `%s': %s",
2019 objfile->name, bfd_errmsg (bfd_get_error ()));
2022 /* We use the same section offsets as from last time. I'm not
2023 sure whether that is always correct for shared libraries. */
2024 objfile->section_offsets = (struct section_offsets *)
2025 obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS);
2026 memcpy (objfile->section_offsets, offsets, SIZEOF_SECTION_OFFSETS);
2027 objfile->num_sections = num_offsets;
2029 /* What the hell is sym_new_init for, anyway? The concept of
2030 distinguishing between the main file and additional files
2031 in this way seems rather dubious. */
2032 if (objfile == symfile_objfile)
2034 (*objfile->sf->sym_new_init) (objfile);
2036 RESET_HP_UX_GLOBALS ();
2040 (*objfile->sf->sym_init) (objfile);
2041 clear_complaints (&symfile_complaints, 1, 1);
2042 /* The "mainline" parameter is a hideous hack; I think leaving it
2043 zero is OK since dbxread.c also does what it needs to do if
2044 objfile->global_psymbols.size is 0. */
2045 (*objfile->sf->sym_read) (objfile, 0);
2046 if (!have_partial_symbols () && !have_full_symbols ())
2049 printf_filtered ("(no debugging symbols found)\n");
2052 objfile->flags |= OBJF_SYMS;
2054 /* We're done reading the symbol file; finish off complaints. */
2055 clear_complaints (&symfile_complaints, 0, 1);
2057 /* Getting new symbols may change our opinion about what is
2060 reinit_frame_cache ();
2062 /* Discard cleanups as symbol reading was successful. */
2063 discard_cleanups (old_cleanups);
2065 /* If the mtime has changed between the time we set new_modtime
2066 and now, we *want* this to be out of date, so don't call stat
2068 objfile->mtime = new_modtime;
2071 /* Call this after reading in a new symbol table to give target
2072 dependent code a crack at the new symbols. For instance, this
2073 could be used to update the values of target-specific symbols GDB
2074 needs to keep track of (such as _sigtramp, or whatever). */
2076 TARGET_SYMFILE_POSTREAD (objfile);
2078 reread_separate_symbols (objfile);
2084 clear_symtab_users ();
2088 /* Handle separate debug info for OBJFILE, which has just been
2090 - If we had separate debug info before, but now we don't, get rid
2091 of the separated objfile.
2092 - If we didn't have separated debug info before, but now we do,
2093 read in the new separated debug info file.
2094 - If the debug link points to a different file, toss the old one
2095 and read the new one.
2096 This function does *not* handle the case where objfile is still
2097 using the same separate debug info file, but that file's timestamp
2098 has changed. That case should be handled by the loop in
2099 reread_symbols already. */
2101 reread_separate_symbols (struct objfile *objfile)
2104 unsigned long crc32;
2106 /* Does the updated objfile's debug info live in a
2108 debug_file = find_separate_debug_file (objfile);
2110 if (objfile->separate_debug_objfile)
2112 /* There are two cases where we need to get rid of
2113 the old separated debug info objfile:
2114 - if the new primary objfile doesn't have
2115 separated debug info, or
2116 - if the new primary objfile has separate debug
2117 info, but it's under a different filename.
2119 If the old and new objfiles both have separate
2120 debug info, under the same filename, then we're
2121 okay --- if the separated file's contents have
2122 changed, we will have caught that when we
2123 visited it in this function's outermost
2126 || strcmp (debug_file, objfile->separate_debug_objfile->name) != 0)
2127 free_objfile (objfile->separate_debug_objfile);
2130 /* If the new objfile has separate debug info, and we
2131 haven't loaded it already, do so now. */
2133 && ! objfile->separate_debug_objfile)
2135 /* Use the same section offset table as objfile itself.
2136 Preserve the flags from objfile that make sense. */
2137 objfile->separate_debug_objfile
2138 = (symbol_file_add_with_addrs_or_offsets
2140 info_verbose, /* from_tty: Don't override the default. */
2141 0, /* No addr table. */
2142 objfile->section_offsets, objfile->num_sections,
2143 0, /* Not mainline. See comments about this above. */
2144 objfile->flags & (OBJF_MAPPED | OBJF_REORDERED
2145 | OBJF_SHARED | OBJF_READNOW
2146 | OBJF_USERLOADED)));
2147 objfile->separate_debug_objfile->separate_debug_objfile_backlink
2163 static filename_language *filename_language_table;
2164 static int fl_table_size, fl_table_next;
2167 add_filename_language (char *ext, enum language lang)
2169 if (fl_table_next >= fl_table_size)
2171 fl_table_size += 10;
2172 filename_language_table =
2173 xrealloc (filename_language_table,
2174 fl_table_size * sizeof (*filename_language_table));
2177 filename_language_table[fl_table_next].ext = xstrdup (ext);
2178 filename_language_table[fl_table_next].lang = lang;
2182 static char *ext_args;
2185 set_ext_lang_command (char *args, int from_tty)
2188 char *cp = ext_args;
2191 /* First arg is filename extension, starting with '.' */
2193 error ("'%s': Filename extension must begin with '.'", ext_args);
2195 /* Find end of first arg. */
2196 while (*cp && !isspace (*cp))
2200 error ("'%s': two arguments required -- filename extension and language",
2203 /* Null-terminate first arg */
2206 /* Find beginning of second arg, which should be a source language. */
2207 while (*cp && isspace (*cp))
2211 error ("'%s': two arguments required -- filename extension and language",
2214 /* Lookup the language from among those we know. */
2215 lang = language_enum (cp);
2217 /* Now lookup the filename extension: do we already know it? */
2218 for (i = 0; i < fl_table_next; i++)
2219 if (0 == strcmp (ext_args, filename_language_table[i].ext))
2222 if (i >= fl_table_next)
2224 /* new file extension */
2225 add_filename_language (ext_args, lang);
2229 /* redefining a previously known filename extension */
2232 /* query ("Really make files of type %s '%s'?", */
2233 /* ext_args, language_str (lang)); */
2235 xfree (filename_language_table[i].ext);
2236 filename_language_table[i].ext = xstrdup (ext_args);
2237 filename_language_table[i].lang = lang;
2242 info_ext_lang_command (char *args, int from_tty)
2246 printf_filtered ("Filename extensions and the languages they represent:");
2247 printf_filtered ("\n\n");
2248 for (i = 0; i < fl_table_next; i++)
2249 printf_filtered ("\t%s\t- %s\n",
2250 filename_language_table[i].ext,
2251 language_str (filename_language_table[i].lang));
2255 init_filename_language_table (void)
2257 if (fl_table_size == 0) /* protect against repetition */
2261 filename_language_table =
2262 xmalloc (fl_table_size * sizeof (*filename_language_table));
2263 add_filename_language (".c", language_c);
2264 add_filename_language (".C", language_cplus);
2265 add_filename_language (".cc", language_cplus);
2266 add_filename_language (".cp", language_cplus);
2267 add_filename_language (".cpp", language_cplus);
2268 add_filename_language (".cxx", language_cplus);
2269 add_filename_language (".c++", language_cplus);
2270 add_filename_language (".java", language_java);
2271 add_filename_language (".class", language_java);
2272 add_filename_language (".m", language_objc);
2273 add_filename_language (".f", language_fortran);
2274 add_filename_language (".F", language_fortran);
2275 add_filename_language (".s", language_asm);
2276 add_filename_language (".S", language_asm);
2277 add_filename_language (".pas", language_pascal);
2278 add_filename_language (".p", language_pascal);
2279 add_filename_language (".pp", language_pascal);
2284 deduce_language_from_filename (char *filename)
2289 if (filename != NULL)
2290 if ((cp = strrchr (filename, '.')) != NULL)
2291 for (i = 0; i < fl_table_next; i++)
2292 if (strcmp (cp, filename_language_table[i].ext) == 0)
2293 return filename_language_table[i].lang;
2295 return language_unknown;
2300 Allocate and partly initialize a new symbol table. Return a pointer
2301 to it. error() if no space.
2303 Caller must set these fields:
2309 possibly free_named_symtabs (symtab->filename);
2313 allocate_symtab (char *filename, struct objfile *objfile)
2315 register struct symtab *symtab;
2317 symtab = (struct symtab *)
2318 obstack_alloc (&objfile->symbol_obstack, sizeof (struct symtab));
2319 memset (symtab, 0, sizeof (*symtab));
2320 symtab->filename = obsavestring (filename, strlen (filename),
2321 &objfile->symbol_obstack);
2322 symtab->fullname = NULL;
2323 symtab->language = deduce_language_from_filename (filename);
2324 symtab->debugformat = obsavestring ("unknown", 7,
2325 &objfile->symbol_obstack);
2327 /* Hook it to the objfile it comes from */
2329 symtab->objfile = objfile;
2330 symtab->next = objfile->symtabs;
2331 objfile->symtabs = symtab;
2333 /* FIXME: This should go away. It is only defined for the Z8000,
2334 and the Z8000 definition of this macro doesn't have anything to
2335 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
2336 here for convenience. */
2337 #ifdef INIT_EXTRA_SYMTAB_INFO
2338 INIT_EXTRA_SYMTAB_INFO (symtab);
2344 struct partial_symtab *
2345 allocate_psymtab (char *filename, struct objfile *objfile)
2347 struct partial_symtab *psymtab;
2349 if (objfile->free_psymtabs)
2351 psymtab = objfile->free_psymtabs;
2352 objfile->free_psymtabs = psymtab->next;
2355 psymtab = (struct partial_symtab *)
2356 obstack_alloc (&objfile->psymbol_obstack,
2357 sizeof (struct partial_symtab));
2359 memset (psymtab, 0, sizeof (struct partial_symtab));
2360 psymtab->filename = obsavestring (filename, strlen (filename),
2361 &objfile->psymbol_obstack);
2362 psymtab->symtab = NULL;
2364 /* Prepend it to the psymtab list for the objfile it belongs to.
2365 Psymtabs are searched in most recent inserted -> least recent
2368 psymtab->objfile = objfile;
2369 psymtab->next = objfile->psymtabs;
2370 objfile->psymtabs = psymtab;
2373 struct partial_symtab **prev_pst;
2374 psymtab->objfile = objfile;
2375 psymtab->next = NULL;
2376 prev_pst = &(objfile->psymtabs);
2377 while ((*prev_pst) != NULL)
2378 prev_pst = &((*prev_pst)->next);
2379 (*prev_pst) = psymtab;
2387 discard_psymtab (struct partial_symtab *pst)
2389 struct partial_symtab **prev_pst;
2392 Empty psymtabs happen as a result of header files which don't
2393 have any symbols in them. There can be a lot of them. But this
2394 check is wrong, in that a psymtab with N_SLINE entries but
2395 nothing else is not empty, but we don't realize that. Fixing
2396 that without slowing things down might be tricky. */
2398 /* First, snip it out of the psymtab chain */
2400 prev_pst = &(pst->objfile->psymtabs);
2401 while ((*prev_pst) != pst)
2402 prev_pst = &((*prev_pst)->next);
2403 (*prev_pst) = pst->next;
2405 /* Next, put it on a free list for recycling */
2407 pst->next = pst->objfile->free_psymtabs;
2408 pst->objfile->free_psymtabs = pst;
2412 /* Reset all data structures in gdb which may contain references to symbol
2416 clear_symtab_users (void)
2418 /* Someday, we should do better than this, by only blowing away
2419 the things that really need to be blown. */
2420 clear_value_history ();
2422 clear_internalvars ();
2423 breakpoint_re_set ();
2424 set_default_breakpoint (0, 0, 0, 0);
2425 clear_current_source_symtab_and_line ();
2426 clear_pc_function_cache ();
2427 if (target_new_objfile_hook)
2428 target_new_objfile_hook (NULL);
2432 clear_symtab_users_cleanup (void *ignore)
2434 clear_symtab_users ();
2437 /* clear_symtab_users_once:
2439 This function is run after symbol reading, or from a cleanup.
2440 If an old symbol table was obsoleted, the old symbol table
2441 has been blown away, but the other GDB data structures that may
2442 reference it have not yet been cleared or re-directed. (The old
2443 symtab was zapped, and the cleanup queued, in free_named_symtab()
2446 This function can be queued N times as a cleanup, or called
2447 directly; it will do all the work the first time, and then will be a
2448 no-op until the next time it is queued. This works by bumping a
2449 counter at queueing time. Much later when the cleanup is run, or at
2450 the end of symbol processing (in case the cleanup is discarded), if
2451 the queued count is greater than the "done-count", we do the work
2452 and set the done-count to the queued count. If the queued count is
2453 less than or equal to the done-count, we just ignore the call. This
2454 is needed because reading a single .o file will often replace many
2455 symtabs (one per .h file, for example), and we don't want to reset
2456 the breakpoints N times in the user's face.
2458 The reason we both queue a cleanup, and call it directly after symbol
2459 reading, is because the cleanup protects us in case of errors, but is
2460 discarded if symbol reading is successful. */
2463 /* FIXME: As free_named_symtabs is currently a big noop this function
2464 is no longer needed. */
2465 static void clear_symtab_users_once (void);
2467 static int clear_symtab_users_queued;
2468 static int clear_symtab_users_done;
2471 clear_symtab_users_once (void)
2473 /* Enforce once-per-`do_cleanups'-semantics */
2474 if (clear_symtab_users_queued <= clear_symtab_users_done)
2476 clear_symtab_users_done = clear_symtab_users_queued;
2478 clear_symtab_users ();
2482 /* Delete the specified psymtab, and any others that reference it. */
2485 cashier_psymtab (struct partial_symtab *pst)
2487 struct partial_symtab *ps, *pprev = NULL;
2490 /* Find its previous psymtab in the chain */
2491 for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
2500 /* Unhook it from the chain. */
2501 if (ps == pst->objfile->psymtabs)
2502 pst->objfile->psymtabs = ps->next;
2504 pprev->next = ps->next;
2506 /* FIXME, we can't conveniently deallocate the entries in the
2507 partial_symbol lists (global_psymbols/static_psymbols) that
2508 this psymtab points to. These just take up space until all
2509 the psymtabs are reclaimed. Ditto the dependencies list and
2510 filename, which are all in the psymbol_obstack. */
2512 /* We need to cashier any psymtab that has this one as a dependency... */
2514 for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
2516 for (i = 0; i < ps->number_of_dependencies; i++)
2518 if (ps->dependencies[i] == pst)
2520 cashier_psymtab (ps);
2521 goto again; /* Must restart, chain has been munged. */
2528 /* If a symtab or psymtab for filename NAME is found, free it along
2529 with any dependent breakpoints, displays, etc.
2530 Used when loading new versions of object modules with the "add-file"
2531 command. This is only called on the top-level symtab or psymtab's name;
2532 it is not called for subsidiary files such as .h files.
2534 Return value is 1 if we blew away the environment, 0 if not.
2535 FIXME. The return value appears to never be used.
2537 FIXME. I think this is not the best way to do this. We should
2538 work on being gentler to the environment while still cleaning up
2539 all stray pointers into the freed symtab. */
2542 free_named_symtabs (char *name)
2545 /* FIXME: With the new method of each objfile having it's own
2546 psymtab list, this function needs serious rethinking. In particular,
2547 why was it ever necessary to toss psymtabs with specific compilation
2548 unit filenames, as opposed to all psymtabs from a particular symbol
2550 Well, the answer is that some systems permit reloading of particular
2551 compilation units. We want to blow away any old info about these
2552 compilation units, regardless of which objfiles they arrived in. --gnu. */
2554 register struct symtab *s;
2555 register struct symtab *prev;
2556 register struct partial_symtab *ps;
2557 struct blockvector *bv;
2560 /* We only wack things if the symbol-reload switch is set. */
2561 if (!symbol_reloading)
2564 /* Some symbol formats have trouble providing file names... */
2565 if (name == 0 || *name == '\0')
2568 /* Look for a psymtab with the specified name. */
2571 for (ps = partial_symtab_list; ps; ps = ps->next)
2573 if (STREQ (name, ps->filename))
2575 cashier_psymtab (ps); /* Blow it away...and its little dog, too. */
2576 goto again2; /* Must restart, chain has been munged */
2580 /* Look for a symtab with the specified name. */
2582 for (s = symtab_list; s; s = s->next)
2584 if (STREQ (name, s->filename))
2591 if (s == symtab_list)
2592 symtab_list = s->next;
2594 prev->next = s->next;
2596 /* For now, queue a delete for all breakpoints, displays, etc., whether
2597 or not they depend on the symtab being freed. This should be
2598 changed so that only those data structures affected are deleted. */
2600 /* But don't delete anything if the symtab is empty.
2601 This test is necessary due to a bug in "dbxread.c" that
2602 causes empty symtabs to be created for N_SO symbols that
2603 contain the pathname of the object file. (This problem
2604 has been fixed in GDB 3.9x). */
2606 bv = BLOCKVECTOR (s);
2607 if (BLOCKVECTOR_NBLOCKS (bv) > 2
2608 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK))
2609 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)))
2611 complaint (&symfile_complaints, "Replacing old symbols for `%s'",
2613 clear_symtab_users_queued++;
2614 make_cleanup (clear_symtab_users_once, 0);
2619 complaint (&symfile_complaints, "Empty symbol table found for `%s'",
2627 /* It is still possible that some breakpoints will be affected
2628 even though no symtab was found, since the file might have
2629 been compiled without debugging, and hence not be associated
2630 with a symtab. In order to handle this correctly, we would need
2631 to keep a list of text address ranges for undebuggable files.
2632 For now, we do nothing, since this is a fairly obscure case. */
2636 /* FIXME, what about the minimal symbol table? */
2643 /* Allocate and partially fill a partial symtab. It will be
2644 completely filled at the end of the symbol list.
2646 FILENAME is the name of the symbol-file we are reading from. */
2648 struct partial_symtab *
2649 start_psymtab_common (struct objfile *objfile,
2650 struct section_offsets *section_offsets, char *filename,
2651 CORE_ADDR textlow, struct partial_symbol **global_syms,
2652 struct partial_symbol **static_syms)
2654 struct partial_symtab *psymtab;
2656 psymtab = allocate_psymtab (filename, objfile);
2657 psymtab->section_offsets = section_offsets;
2658 psymtab->textlow = textlow;
2659 psymtab->texthigh = psymtab->textlow; /* default */
2660 psymtab->globals_offset = global_syms - objfile->global_psymbols.list;
2661 psymtab->statics_offset = static_syms - objfile->static_psymbols.list;
2665 /* Add a symbol with a long value to a psymtab.
2666 Since one arg is a struct, we pass in a ptr and deref it (sigh). */
2669 add_psymbol_to_list (char *name, int namelength, namespace_enum namespace,
2670 enum address_class class,
2671 struct psymbol_allocation_list *list, long val, /* Value as a long */
2672 CORE_ADDR coreaddr, /* Value as a CORE_ADDR */
2673 enum language language, struct objfile *objfile)
2675 register struct partial_symbol *psym;
2676 char *buf = alloca (namelength + 1);
2677 /* psymbol is static so that there will be no uninitialized gaps in the
2678 structure which might contain random data, causing cache misses in
2680 static struct partial_symbol psymbol;
2682 /* Create local copy of the partial symbol */
2683 memcpy (buf, name, namelength);
2684 buf[namelength] = '\0';
2685 SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, objfile->psymbol_cache);
2686 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2689 SYMBOL_VALUE (&psymbol) = val;
2693 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
2695 SYMBOL_SECTION (&psymbol) = 0;
2696 SYMBOL_LANGUAGE (&psymbol) = language;
2697 PSYMBOL_NAMESPACE (&psymbol) = namespace;
2698 PSYMBOL_CLASS (&psymbol) = class;
2699 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language);
2701 /* Stash the partial symbol away in the cache */
2702 psym = bcache (&psymbol, sizeof (struct partial_symbol), objfile->psymbol_cache);
2704 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2705 if (list->next >= list->list + list->size)
2707 extend_psymbol_list (list, objfile);
2709 *list->next++ = psym;
2710 OBJSTAT (objfile, n_psyms++);
2713 /* Add a symbol with a long value to a psymtab. This differs from
2714 * add_psymbol_to_list above in taking both a mangled and a demangled
2718 add_psymbol_with_dem_name_to_list (char *name, int namelength, char *dem_name,
2719 int dem_namelength, namespace_enum namespace,
2720 enum address_class class,
2721 struct psymbol_allocation_list *list, long val, /* Value as a long */
2722 CORE_ADDR coreaddr, /* Value as a CORE_ADDR */
2723 enum language language,
2724 struct objfile *objfile)
2726 register struct partial_symbol *psym;
2727 char *buf = alloca (namelength + 1);
2728 /* psymbol is static so that there will be no uninitialized gaps in the
2729 structure which might contain random data, causing cache misses in
2731 static struct partial_symbol psymbol;
2733 /* Create local copy of the partial symbol */
2735 memcpy (buf, name, namelength);
2736 buf[namelength] = '\0';
2737 SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, objfile->psymbol_cache);
2739 buf = alloca (dem_namelength + 1);
2740 memcpy (buf, dem_name, dem_namelength);
2741 buf[dem_namelength] = '\0';
2746 case language_cplus:
2747 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol) =
2748 bcache (buf, dem_namelength + 1, objfile->psymbol_cache);
2750 /* FIXME What should be done for the default case? Ignoring for now. */
2753 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2756 SYMBOL_VALUE (&psymbol) = val;
2760 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
2762 SYMBOL_SECTION (&psymbol) = 0;
2763 SYMBOL_LANGUAGE (&psymbol) = language;
2764 PSYMBOL_NAMESPACE (&psymbol) = namespace;
2765 PSYMBOL_CLASS (&psymbol) = class;
2766 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language);
2768 /* Stash the partial symbol away in the cache */
2769 psym = bcache (&psymbol, sizeof (struct partial_symbol), objfile->psymbol_cache);
2771 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2772 if (list->next >= list->list + list->size)
2774 extend_psymbol_list (list, objfile);
2776 *list->next++ = psym;
2777 OBJSTAT (objfile, n_psyms++);
2780 /* Initialize storage for partial symbols. */
2783 init_psymbol_list (struct objfile *objfile, int total_symbols)
2785 /* Free any previously allocated psymbol lists. */
2787 if (objfile->global_psymbols.list)
2789 xmfree (objfile->md, objfile->global_psymbols.list);
2791 if (objfile->static_psymbols.list)
2793 xmfree (objfile->md, objfile->static_psymbols.list);
2796 /* Current best guess is that approximately a twentieth
2797 of the total symbols (in a debugging file) are global or static
2800 objfile->global_psymbols.size = total_symbols / 10;
2801 objfile->static_psymbols.size = total_symbols / 10;
2803 if (objfile->global_psymbols.size > 0)
2805 objfile->global_psymbols.next =
2806 objfile->global_psymbols.list = (struct partial_symbol **)
2807 xmmalloc (objfile->md, (objfile->global_psymbols.size
2808 * sizeof (struct partial_symbol *)));
2810 if (objfile->static_psymbols.size > 0)
2812 objfile->static_psymbols.next =
2813 objfile->static_psymbols.list = (struct partial_symbol **)
2814 xmmalloc (objfile->md, (objfile->static_psymbols.size
2815 * sizeof (struct partial_symbol *)));
2820 The following code implements an abstraction for debugging overlay sections.
2822 The target model is as follows:
2823 1) The gnu linker will permit multiple sections to be mapped into the
2824 same VMA, each with its own unique LMA (or load address).
2825 2) It is assumed that some runtime mechanism exists for mapping the
2826 sections, one by one, from the load address into the VMA address.
2827 3) This code provides a mechanism for gdb to keep track of which
2828 sections should be considered to be mapped from the VMA to the LMA.
2829 This information is used for symbol lookup, and memory read/write.
2830 For instance, if a section has been mapped then its contents
2831 should be read from the VMA, otherwise from the LMA.
2833 Two levels of debugger support for overlays are available. One is
2834 "manual", in which the debugger relies on the user to tell it which
2835 overlays are currently mapped. This level of support is
2836 implemented entirely in the core debugger, and the information about
2837 whether a section is mapped is kept in the objfile->obj_section table.
2839 The second level of support is "automatic", and is only available if
2840 the target-specific code provides functionality to read the target's
2841 overlay mapping table, and translate its contents for the debugger
2842 (by updating the mapped state information in the obj_section tables).
2844 The interface is as follows:
2846 overlay map <name> -- tell gdb to consider this section mapped
2847 overlay unmap <name> -- tell gdb to consider this section unmapped
2848 overlay list -- list the sections that GDB thinks are mapped
2849 overlay read-target -- get the target's state of what's mapped
2850 overlay off/manual/auto -- set overlay debugging state
2851 Functional interface:
2852 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2853 section, return that section.
2854 find_pc_overlay(pc): find any overlay section that contains
2855 the pc, either in its VMA or its LMA
2856 overlay_is_mapped(sect): true if overlay is marked as mapped
2857 section_is_overlay(sect): true if section's VMA != LMA
2858 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2859 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2860 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2861 overlay_mapped_address(...): map an address from section's LMA to VMA
2862 overlay_unmapped_address(...): map an address from section's VMA to LMA
2863 symbol_overlayed_address(...): Return a "current" address for symbol:
2864 either in VMA or LMA depending on whether
2865 the symbol's section is currently mapped
2868 /* Overlay debugging state: */
2870 enum overlay_debugging_state overlay_debugging = ovly_off;
2871 int overlay_cache_invalid = 0; /* True if need to refresh mapped state */
2873 /* Target vector for refreshing overlay mapped state */
2874 static void simple_overlay_update (struct obj_section *);
2875 void (*target_overlay_update) (struct obj_section *) = simple_overlay_update;
2877 /* Function: section_is_overlay (SECTION)
2878 Returns true if SECTION has VMA not equal to LMA, ie.
2879 SECTION is loaded at an address different from where it will "run". */
2882 section_is_overlay (asection *section)
2884 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2886 if (overlay_debugging)
2887 if (section && section->lma != 0 &&
2888 section->vma != section->lma)
2894 /* Function: overlay_invalidate_all (void)
2895 Invalidate the mapped state of all overlay sections (mark it as stale). */
2898 overlay_invalidate_all (void)
2900 struct objfile *objfile;
2901 struct obj_section *sect;
2903 ALL_OBJSECTIONS (objfile, sect)
2904 if (section_is_overlay (sect->the_bfd_section))
2905 sect->ovly_mapped = -1;
2908 /* Function: overlay_is_mapped (SECTION)
2909 Returns true if section is an overlay, and is currently mapped.
2910 Private: public access is thru function section_is_mapped.
2912 Access to the ovly_mapped flag is restricted to this function, so
2913 that we can do automatic update. If the global flag
2914 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2915 overlay_invalidate_all. If the mapped state of the particular
2916 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2919 overlay_is_mapped (struct obj_section *osect)
2921 if (osect == 0 || !section_is_overlay (osect->the_bfd_section))
2924 switch (overlay_debugging)
2928 return 0; /* overlay debugging off */
2929 case ovly_auto: /* overlay debugging automatic */
2930 /* Unles there is a target_overlay_update function,
2931 there's really nothing useful to do here (can't really go auto) */
2932 if (target_overlay_update)
2934 if (overlay_cache_invalid)
2936 overlay_invalidate_all ();
2937 overlay_cache_invalid = 0;
2939 if (osect->ovly_mapped == -1)
2940 (*target_overlay_update) (osect);
2942 /* fall thru to manual case */
2943 case ovly_on: /* overlay debugging manual */
2944 return osect->ovly_mapped == 1;
2948 /* Function: section_is_mapped
2949 Returns true if section is an overlay, and is currently mapped. */
2952 section_is_mapped (asection *section)
2954 struct objfile *objfile;
2955 struct obj_section *osect;
2957 if (overlay_debugging)
2958 if (section && section_is_overlay (section))
2959 ALL_OBJSECTIONS (objfile, osect)
2960 if (osect->the_bfd_section == section)
2961 return overlay_is_mapped (osect);
2966 /* Function: pc_in_unmapped_range
2967 If PC falls into the lma range of SECTION, return true, else false. */
2970 pc_in_unmapped_range (CORE_ADDR pc, asection *section)
2972 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2976 if (overlay_debugging)
2977 if (section && section_is_overlay (section))
2979 size = bfd_get_section_size_before_reloc (section);
2980 if (section->lma <= pc && pc < section->lma + size)
2986 /* Function: pc_in_mapped_range
2987 If PC falls into the vma range of SECTION, return true, else false. */
2990 pc_in_mapped_range (CORE_ADDR pc, asection *section)
2992 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2996 if (overlay_debugging)
2997 if (section && section_is_overlay (section))
2999 size = bfd_get_section_size_before_reloc (section);
3000 if (section->vma <= pc && pc < section->vma + size)
3007 /* Return true if the mapped ranges of sections A and B overlap, false
3010 sections_overlap (asection *a, asection *b)
3012 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3014 CORE_ADDR a_start = a->vma;
3015 CORE_ADDR a_end = a->vma + bfd_get_section_size_before_reloc (a);
3016 CORE_ADDR b_start = b->vma;
3017 CORE_ADDR b_end = b->vma + bfd_get_section_size_before_reloc (b);
3019 return (a_start < b_end && b_start < a_end);
3022 /* Function: overlay_unmapped_address (PC, SECTION)
3023 Returns the address corresponding to PC in the unmapped (load) range.
3024 May be the same as PC. */
3027 overlay_unmapped_address (CORE_ADDR pc, asection *section)
3029 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
3031 if (overlay_debugging)
3032 if (section && section_is_overlay (section) &&
3033 pc_in_mapped_range (pc, section))
3034 return pc + section->lma - section->vma;
3039 /* Function: overlay_mapped_address (PC, SECTION)
3040 Returns the address corresponding to PC in the mapped (runtime) range.
3041 May be the same as PC. */
3044 overlay_mapped_address (CORE_ADDR pc, asection *section)
3046 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3048 if (overlay_debugging)
3049 if (section && section_is_overlay (section) &&
3050 pc_in_unmapped_range (pc, section))
3051 return pc + section->vma - section->lma;
3057 /* Function: symbol_overlayed_address
3058 Return one of two addresses (relative to the VMA or to the LMA),
3059 depending on whether the section is mapped or not. */
3062 symbol_overlayed_address (CORE_ADDR address, asection *section)
3064 if (overlay_debugging)
3066 /* If the symbol has no section, just return its regular address. */
3069 /* If the symbol's section is not an overlay, just return its address */
3070 if (!section_is_overlay (section))
3072 /* If the symbol's section is mapped, just return its address */
3073 if (section_is_mapped (section))
3076 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3077 * then return its LOADED address rather than its vma address!!
3079 return overlay_unmapped_address (address, section);
3084 /* Function: find_pc_overlay (PC)
3085 Return the best-match overlay section for PC:
3086 If PC matches a mapped overlay section's VMA, return that section.
3087 Else if PC matches an unmapped section's VMA, return that section.
3088 Else if PC matches an unmapped section's LMA, return that section. */
3091 find_pc_overlay (CORE_ADDR pc)
3093 struct objfile *objfile;
3094 struct obj_section *osect, *best_match = NULL;
3096 if (overlay_debugging)
3097 ALL_OBJSECTIONS (objfile, osect)
3098 if (section_is_overlay (osect->the_bfd_section))
3100 if (pc_in_mapped_range (pc, osect->the_bfd_section))
3102 if (overlay_is_mapped (osect))
3103 return osect->the_bfd_section;
3107 else if (pc_in_unmapped_range (pc, osect->the_bfd_section))
3110 return best_match ? best_match->the_bfd_section : NULL;
3113 /* Function: find_pc_mapped_section (PC)
3114 If PC falls into the VMA address range of an overlay section that is
3115 currently marked as MAPPED, return that section. Else return NULL. */
3118 find_pc_mapped_section (CORE_ADDR pc)
3120 struct objfile *objfile;
3121 struct obj_section *osect;
3123 if (overlay_debugging)
3124 ALL_OBJSECTIONS (objfile, osect)
3125 if (pc_in_mapped_range (pc, osect->the_bfd_section) &&
3126 overlay_is_mapped (osect))
3127 return osect->the_bfd_section;
3132 /* Function: list_overlays_command
3133 Print a list of mapped sections and their PC ranges */
3136 list_overlays_command (char *args, int from_tty)
3139 struct objfile *objfile;
3140 struct obj_section *osect;
3142 if (overlay_debugging)
3143 ALL_OBJSECTIONS (objfile, osect)
3144 if (overlay_is_mapped (osect))
3150 vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section);
3151 lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section);
3152 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
3153 name = bfd_section_name (objfile->obfd, osect->the_bfd_section);
3155 printf_filtered ("Section %s, loaded at ", name);
3156 print_address_numeric (lma, 1, gdb_stdout);
3157 puts_filtered (" - ");
3158 print_address_numeric (lma + size, 1, gdb_stdout);
3159 printf_filtered (", mapped at ");
3160 print_address_numeric (vma, 1, gdb_stdout);
3161 puts_filtered (" - ");
3162 print_address_numeric (vma + size, 1, gdb_stdout);
3163 puts_filtered ("\n");
3168 printf_filtered ("No sections are mapped.\n");
3171 /* Function: map_overlay_command
3172 Mark the named section as mapped (ie. residing at its VMA address). */
3175 map_overlay_command (char *args, int from_tty)
3177 struct objfile *objfile, *objfile2;
3178 struct obj_section *sec, *sec2;
3181 if (!overlay_debugging)
3183 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3184 the 'overlay manual' command.");
3186 if (args == 0 || *args == 0)
3187 error ("Argument required: name of an overlay section");
3189 /* First, find a section matching the user supplied argument */
3190 ALL_OBJSECTIONS (objfile, sec)
3191 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
3193 /* Now, check to see if the section is an overlay. */
3194 bfdsec = sec->the_bfd_section;
3195 if (!section_is_overlay (bfdsec))
3196 continue; /* not an overlay section */
3198 /* Mark the overlay as "mapped" */
3199 sec->ovly_mapped = 1;
3201 /* Next, make a pass and unmap any sections that are
3202 overlapped by this new section: */
3203 ALL_OBJSECTIONS (objfile2, sec2)
3204 if (sec2->ovly_mapped
3206 && sec->the_bfd_section != sec2->the_bfd_section
3207 && sections_overlap (sec->the_bfd_section,
3208 sec2->the_bfd_section))
3211 printf_filtered ("Note: section %s unmapped by overlap\n",
3212 bfd_section_name (objfile->obfd,
3213 sec2->the_bfd_section));
3214 sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2 */
3218 error ("No overlay section called %s", args);
3221 /* Function: unmap_overlay_command
3222 Mark the overlay section as unmapped
3223 (ie. resident in its LMA address range, rather than the VMA range). */
3226 unmap_overlay_command (char *args, int from_tty)
3228 struct objfile *objfile;
3229 struct obj_section *sec;
3231 if (!overlay_debugging)
3233 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3234 the 'overlay manual' command.");
3236 if (args == 0 || *args == 0)
3237 error ("Argument required: name of an overlay section");
3239 /* First, find a section matching the user supplied argument */
3240 ALL_OBJSECTIONS (objfile, sec)
3241 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
3243 if (!sec->ovly_mapped)
3244 error ("Section %s is not mapped", args);
3245 sec->ovly_mapped = 0;
3248 error ("No overlay section called %s", args);
3251 /* Function: overlay_auto_command
3252 A utility command to turn on overlay debugging.
3253 Possibly this should be done via a set/show command. */
3256 overlay_auto_command (char *args, int from_tty)
3258 overlay_debugging = ovly_auto;
3259 enable_overlay_breakpoints ();
3261 printf_filtered ("Automatic overlay debugging enabled.");
3264 /* Function: overlay_manual_command
3265 A utility command to turn on overlay debugging.
3266 Possibly this should be done via a set/show command. */
3269 overlay_manual_command (char *args, int from_tty)
3271 overlay_debugging = ovly_on;
3272 disable_overlay_breakpoints ();
3274 printf_filtered ("Overlay debugging enabled.");
3277 /* Function: overlay_off_command
3278 A utility command to turn on overlay debugging.
3279 Possibly this should be done via a set/show command. */
3282 overlay_off_command (char *args, int from_tty)
3284 overlay_debugging = ovly_off;
3285 disable_overlay_breakpoints ();
3287 printf_filtered ("Overlay debugging disabled.");
3291 overlay_load_command (char *args, int from_tty)
3293 if (target_overlay_update)
3294 (*target_overlay_update) (NULL);
3296 error ("This target does not know how to read its overlay state.");
3299 /* Function: overlay_command
3300 A place-holder for a mis-typed command */
3302 /* Command list chain containing all defined "overlay" subcommands. */
3303 struct cmd_list_element *overlaylist;
3306 overlay_command (char *args, int from_tty)
3309 ("\"overlay\" must be followed by the name of an overlay command.\n");
3310 help_list (overlaylist, "overlay ", -1, gdb_stdout);
3314 /* Target Overlays for the "Simplest" overlay manager:
3316 This is GDB's default target overlay layer. It works with the
3317 minimal overlay manager supplied as an example by Cygnus. The
3318 entry point is via a function pointer "target_overlay_update",
3319 so targets that use a different runtime overlay manager can
3320 substitute their own overlay_update function and take over the
3323 The overlay_update function pokes around in the target's data structures
3324 to see what overlays are mapped, and updates GDB's overlay mapping with
3327 In this simple implementation, the target data structures are as follows:
3328 unsigned _novlys; /# number of overlay sections #/
3329 unsigned _ovly_table[_novlys][4] = {
3330 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3331 {..., ..., ..., ...},
3333 unsigned _novly_regions; /# number of overlay regions #/
3334 unsigned _ovly_region_table[_novly_regions][3] = {
3335 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3338 These functions will attempt to update GDB's mappedness state in the
3339 symbol section table, based on the target's mappedness state.
3341 To do this, we keep a cached copy of the target's _ovly_table, and
3342 attempt to detect when the cached copy is invalidated. The main
3343 entry point is "simple_overlay_update(SECT), which looks up SECT in
3344 the cached table and re-reads only the entry for that section from
3345 the target (whenever possible).
3348 /* Cached, dynamically allocated copies of the target data structures: */
3349 static unsigned (*cache_ovly_table)[4] = 0;
3351 static unsigned (*cache_ovly_region_table)[3] = 0;
3353 static unsigned cache_novlys = 0;
3355 static unsigned cache_novly_regions = 0;
3357 static CORE_ADDR cache_ovly_table_base = 0;
3359 static CORE_ADDR cache_ovly_region_table_base = 0;
3363 VMA, SIZE, LMA, MAPPED
3365 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
3367 /* Throw away the cached copy of _ovly_table */
3369 simple_free_overlay_table (void)
3371 if (cache_ovly_table)
3372 xfree (cache_ovly_table);
3374 cache_ovly_table = NULL;
3375 cache_ovly_table_base = 0;
3379 /* Throw away the cached copy of _ovly_region_table */
3381 simple_free_overlay_region_table (void)
3383 if (cache_ovly_region_table)
3384 xfree (cache_ovly_region_table);
3385 cache_novly_regions = 0;
3386 cache_ovly_region_table = NULL;
3387 cache_ovly_region_table_base = 0;
3391 /* Read an array of ints from the target into a local buffer.
3392 Convert to host order. int LEN is number of ints */
3394 read_target_long_array (CORE_ADDR memaddr, unsigned int *myaddr, int len)
3396 /* FIXME (alloca): Not safe if array is very large. */
3397 char *buf = alloca (len * TARGET_LONG_BYTES);
3400 read_memory (memaddr, buf, len * TARGET_LONG_BYTES);
3401 for (i = 0; i < len; i++)
3402 myaddr[i] = extract_unsigned_integer (TARGET_LONG_BYTES * i + buf,
3406 /* Find and grab a copy of the target _ovly_table
3407 (and _novlys, which is needed for the table's size) */
3409 simple_read_overlay_table (void)
3411 struct minimal_symbol *novlys_msym, *ovly_table_msym;
3413 simple_free_overlay_table ();
3414 novlys_msym = lookup_minimal_symbol ("_novlys", NULL, NULL);
3417 error ("Error reading inferior's overlay table: "
3418 "couldn't find `_novlys' variable\n"
3419 "in inferior. Use `overlay manual' mode.");
3423 ovly_table_msym = lookup_minimal_symbol ("_ovly_table", NULL, NULL);
3424 if (! ovly_table_msym)
3426 error ("Error reading inferior's overlay table: couldn't find "
3427 "`_ovly_table' array\n"
3428 "in inferior. Use `overlay manual' mode.");
3432 cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym), 4);
3434 = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table));
3435 cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (ovly_table_msym);
3436 read_target_long_array (cache_ovly_table_base,
3437 (int *) cache_ovly_table,
3440 return 1; /* SUCCESS */
3444 /* Find and grab a copy of the target _ovly_region_table
3445 (and _novly_regions, which is needed for the table's size) */
3447 simple_read_overlay_region_table (void)
3449 struct minimal_symbol *msym;
3451 simple_free_overlay_region_table ();
3452 msym = lookup_minimal_symbol ("_novly_regions", NULL, NULL);
3454 cache_novly_regions = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4);
3456 return 0; /* failure */
3457 cache_ovly_region_table = (void *) xmalloc (cache_novly_regions * 12);
3458 if (cache_ovly_region_table != NULL)
3460 msym = lookup_minimal_symbol ("_ovly_region_table", NULL, NULL);
3463 cache_ovly_region_table_base = SYMBOL_VALUE_ADDRESS (msym);
3464 read_target_long_array (cache_ovly_region_table_base,
3465 (int *) cache_ovly_region_table,
3466 cache_novly_regions * 3);
3469 return 0; /* failure */
3472 return 0; /* failure */
3473 return 1; /* SUCCESS */
3477 /* Function: simple_overlay_update_1
3478 A helper function for simple_overlay_update. Assuming a cached copy
3479 of _ovly_table exists, look through it to find an entry whose vma,
3480 lma and size match those of OSECT. Re-read the entry and make sure
3481 it still matches OSECT (else the table may no longer be valid).
3482 Set OSECT's mapped state to match the entry. Return: 1 for
3483 success, 0 for failure. */
3486 simple_overlay_update_1 (struct obj_section *osect)
3489 bfd *obfd = osect->objfile->obfd;
3490 asection *bsect = osect->the_bfd_section;
3492 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
3493 for (i = 0; i < cache_novlys; i++)
3494 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3495 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3496 /* && cache_ovly_table[i][SIZE] == size */ )
3498 read_target_long_array (cache_ovly_table_base + i * TARGET_LONG_BYTES,
3499 (int *) cache_ovly_table[i], 4);
3500 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3501 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3502 /* && cache_ovly_table[i][SIZE] == size */ )
3504 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3507 else /* Warning! Warning! Target's ovly table has changed! */
3513 /* Function: simple_overlay_update
3514 If OSECT is NULL, then update all sections' mapped state
3515 (after re-reading the entire target _ovly_table).
3516 If OSECT is non-NULL, then try to find a matching entry in the
3517 cached ovly_table and update only OSECT's mapped state.
3518 If a cached entry can't be found or the cache isn't valid, then
3519 re-read the entire cache, and go ahead and update all sections. */
3522 simple_overlay_update (struct obj_section *osect)
3524 struct objfile *objfile;
3526 /* Were we given an osect to look up? NULL means do all of them. */
3528 /* Have we got a cached copy of the target's overlay table? */
3529 if (cache_ovly_table != NULL)
3530 /* Does its cached location match what's currently in the symtab? */
3531 if (cache_ovly_table_base ==
3532 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL, NULL)))
3533 /* Then go ahead and try to look up this single section in the cache */
3534 if (simple_overlay_update_1 (osect))
3535 /* Found it! We're done. */
3538 /* Cached table no good: need to read the entire table anew.
3539 Or else we want all the sections, in which case it's actually
3540 more efficient to read the whole table in one block anyway. */
3542 if (! simple_read_overlay_table ())
3545 /* Now may as well update all sections, even if only one was requested. */
3546 ALL_OBJSECTIONS (objfile, osect)
3547 if (section_is_overlay (osect->the_bfd_section))
3550 bfd *obfd = osect->objfile->obfd;
3551 asection *bsect = osect->the_bfd_section;
3553 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
3554 for (i = 0; i < cache_novlys; i++)
3555 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3556 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3557 /* && cache_ovly_table[i][SIZE] == size */ )
3558 { /* obj_section matches i'th entry in ovly_table */
3559 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3560 break; /* finished with inner for loop: break out */
3567 _initialize_symfile (void)
3569 struct cmd_list_element *c;
3571 c = add_cmd ("symbol-file", class_files, symbol_file_command,
3572 "Load symbol table from executable file FILE.\n\
3573 The `file' command can also load symbol tables, as well as setting the file\n\
3574 to execute.", &cmdlist);
3575 set_cmd_completer (c, filename_completer);
3577 c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command,
3578 "Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3579 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3580 ADDR is the starting address of the file's text.\n\
3581 The optional arguments are section-name section-address pairs and\n\
3582 should be specified if the data and bss segments are not contiguous\n\
3583 with the text. SECT is a section name to be loaded at SECT_ADDR.",
3585 set_cmd_completer (c, filename_completer);
3587 c = add_cmd ("add-shared-symbol-files", class_files,
3588 add_shared_symbol_files_command,
3589 "Load the symbols from shared objects in the dynamic linker's link map.",
3591 c = add_alias_cmd ("assf", "add-shared-symbol-files", class_files, 1,
3594 c = add_cmd ("load", class_files, load_command,
3595 "Dynamically load FILE into the running program, and record its symbols\n\
3596 for access from GDB.", &cmdlist);
3597 set_cmd_completer (c, filename_completer);
3600 (add_set_cmd ("symbol-reloading", class_support, var_boolean,
3601 (char *) &symbol_reloading,
3602 "Set dynamic symbol table reloading multiple times in one run.",
3606 add_prefix_cmd ("overlay", class_support, overlay_command,
3607 "Commands for debugging overlays.", &overlaylist,
3608 "overlay ", 0, &cmdlist);
3610 add_com_alias ("ovly", "overlay", class_alias, 1);
3611 add_com_alias ("ov", "overlay", class_alias, 1);
3613 add_cmd ("map-overlay", class_support, map_overlay_command,
3614 "Assert that an overlay section is mapped.", &overlaylist);
3616 add_cmd ("unmap-overlay", class_support, unmap_overlay_command,
3617 "Assert that an overlay section is unmapped.", &overlaylist);
3619 add_cmd ("list-overlays", class_support, list_overlays_command,
3620 "List mappings of overlay sections.", &overlaylist);
3622 add_cmd ("manual", class_support, overlay_manual_command,
3623 "Enable overlay debugging.", &overlaylist);
3624 add_cmd ("off", class_support, overlay_off_command,
3625 "Disable overlay debugging.", &overlaylist);
3626 add_cmd ("auto", class_support, overlay_auto_command,
3627 "Enable automatic overlay debugging.", &overlaylist);
3628 add_cmd ("load-target", class_support, overlay_load_command,
3629 "Read the overlay mapping state from the target.", &overlaylist);
3631 /* Filename extension to source language lookup table: */
3632 init_filename_language_table ();
3633 c = add_set_cmd ("extension-language", class_files, var_string_noescape,
3635 "Set mapping between filename extension and source language.\n\
3636 Usage: set extension-language .foo bar",
3638 set_cmd_cfunc (c, set_ext_lang_command);
3640 add_info ("extensions", info_ext_lang_command,
3641 "All filename extensions associated with a source language.");
3644 (add_set_cmd ("download-write-size", class_obscure,
3645 var_integer, (char *) &download_write_size,
3646 "Set the write size used when downloading a program.\n"
3647 "Only used when downloading a program onto a remote\n"
3648 "target. Specify zero, or a negative value, to disable\n"
3649 "blocked writes. The actual size of each transfer is also\n"
3650 "limited by the size of the target packet and the memory\n"
3655 debug_file_directory = xstrdup (DEBUGDIR);
3657 ("debug-file-directory", class_support, var_string,
3658 (char *) &debug_file_directory,
3659 "Set the directory where separate debug symbols are searched for.\n"
3660 "Separate debug symbols are first searched for in the same\n"
3661 "directory as the binary, then in the `" DEBUG_SUBDIRECTORY
3663 "and lastly at the path of the directory of the binary with\n"
3664 "the global debug-file directory prepended\n",
3666 add_show_from_set (c, &showlist);
3667 set_cmd_completer (c, filename_completer);