1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
4 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
6 Contributed by Cygnus Support, using pieces from other GDB modules.
8 This file is part of GDB.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 59 Temple Place - Suite 330,
23 Boston, MA 02111-1307, USA. */
37 #include "breakpoint.h"
39 #include "complaints.h"
41 #include "inferior.h" /* for write_pc */
42 #include "filenames.h" /* for DOSish file names */
43 #include "gdb-stabs.h"
44 #include "gdb_obstack.h"
45 #include "completer.h"
48 #include "readline/readline.h"
49 #include "gdb_assert.h"
52 #include <sys/types.h>
54 #include "gdb_string.h"
63 int (*deprecated_ui_load_progress_hook
) (const char *section
, unsigned long num
);
64 void (*deprecated_show_load_progress
) (const char *section
,
65 unsigned long section_sent
,
66 unsigned long section_size
,
67 unsigned long total_sent
,
68 unsigned long total_size
);
69 void (*deprecated_pre_add_symbol_hook
) (const char *);
70 void (*deprecated_post_add_symbol_hook
) (void);
71 void (*deprecated_target_new_objfile_hook
) (struct objfile
*);
73 static void clear_symtab_users_cleanup (void *ignore
);
75 /* Global variables owned by this file */
76 int readnow_symbol_files
; /* Read full symbols immediately */
78 /* External variables and functions referenced. */
80 extern void report_transfer_performance (unsigned long, time_t, time_t);
82 /* Functions this file defines */
85 static int simple_read_overlay_region_table (void);
86 static void simple_free_overlay_region_table (void);
89 static void set_initial_language (void);
91 static void load_command (char *, int);
93 static void symbol_file_add_main_1 (char *args
, int from_tty
, int flags
);
95 static void add_symbol_file_command (char *, int);
97 static void add_shared_symbol_files_command (char *, int);
99 static void reread_separate_symbols (struct objfile
*objfile
);
101 static void cashier_psymtab (struct partial_symtab
*);
103 bfd
*symfile_bfd_open (char *);
105 int get_section_index (struct objfile
*, char *);
107 static void find_sym_fns (struct objfile
*);
109 static void decrement_reading_symtab (void *);
111 static void overlay_invalidate_all (void);
113 static int overlay_is_mapped (struct obj_section
*);
115 void list_overlays_command (char *, int);
117 void map_overlay_command (char *, int);
119 void unmap_overlay_command (char *, int);
121 static void overlay_auto_command (char *, int);
123 static void overlay_manual_command (char *, int);
125 static void overlay_off_command (char *, int);
127 static void overlay_load_command (char *, int);
129 static void overlay_command (char *, int);
131 static void simple_free_overlay_table (void);
133 static void read_target_long_array (CORE_ADDR
, unsigned int *, int);
135 static int simple_read_overlay_table (void);
137 static int simple_overlay_update_1 (struct obj_section
*);
139 static void add_filename_language (char *ext
, enum language lang
);
141 static void set_ext_lang_command (char *args
, int from_tty
);
143 static void info_ext_lang_command (char *args
, int from_tty
);
145 static char *find_separate_debug_file (struct objfile
*objfile
);
147 static void init_filename_language_table (void);
149 void _initialize_symfile (void);
151 /* List of all available sym_fns. On gdb startup, each object file reader
152 calls add_symtab_fns() to register information on each format it is
155 static struct sym_fns
*symtab_fns
= NULL
;
157 /* Flag for whether user will be reloading symbols multiple times.
158 Defaults to ON for VxWorks, otherwise OFF. */
160 #ifdef SYMBOL_RELOADING_DEFAULT
161 int symbol_reloading
= SYMBOL_RELOADING_DEFAULT
;
163 int symbol_reloading
= 0;
166 /* If non-zero, shared library symbols will be added automatically
167 when the inferior is created, new libraries are loaded, or when
168 attaching to the inferior. This is almost always what users will
169 want to have happen; but for very large programs, the startup time
170 will be excessive, and so if this is a problem, the user can clear
171 this flag and then add the shared library symbols as needed. Note
172 that there is a potential for confusion, since if the shared
173 library symbols are not loaded, commands like "info fun" will *not*
174 report all the functions that are actually present. */
176 int auto_solib_add
= 1;
178 /* For systems that support it, a threshold size in megabytes. If
179 automatically adding a new library's symbol table to those already
180 known to the debugger would cause the total shared library symbol
181 size to exceed this threshhold, then the shlib's symbols are not
182 added. The threshold is ignored if the user explicitly asks for a
183 shlib to be added, such as when using the "sharedlibrary"
186 int auto_solib_limit
;
189 /* This compares two partial symbols by names, using strcmp_iw_ordered
190 for the comparison. */
193 compare_psymbols (const void *s1p
, const void *s2p
)
195 struct partial_symbol
*const *s1
= s1p
;
196 struct partial_symbol
*const *s2
= s2p
;
198 return strcmp_iw_ordered (SYMBOL_SEARCH_NAME (*s1
),
199 SYMBOL_SEARCH_NAME (*s2
));
203 sort_pst_symbols (struct partial_symtab
*pst
)
205 /* Sort the global list; don't sort the static list */
207 qsort (pst
->objfile
->global_psymbols
.list
+ pst
->globals_offset
,
208 pst
->n_global_syms
, sizeof (struct partial_symbol
*),
212 /* Make a null terminated copy of the string at PTR with SIZE characters in
213 the obstack pointed to by OBSTACKP . Returns the address of the copy.
214 Note that the string at PTR does not have to be null terminated, I.E. it
215 may be part of a larger string and we are only saving a substring. */
218 obsavestring (const char *ptr
, int size
, struct obstack
*obstackp
)
220 char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
221 /* Open-coded memcpy--saves function call time. These strings are usually
222 short. FIXME: Is this really still true with a compiler that can
225 const char *p1
= ptr
;
227 const char *end
= ptr
+ size
;
235 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
236 in the obstack pointed to by OBSTACKP. */
239 obconcat (struct obstack
*obstackp
, const char *s1
, const char *s2
,
242 int len
= strlen (s1
) + strlen (s2
) + strlen (s3
) + 1;
243 char *val
= (char *) obstack_alloc (obstackp
, len
);
250 /* True if we are nested inside psymtab_to_symtab. */
252 int currently_reading_symtab
= 0;
255 decrement_reading_symtab (void *dummy
)
257 currently_reading_symtab
--;
260 /* Get the symbol table that corresponds to a partial_symtab.
261 This is fast after the first time you do it. In fact, there
262 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
266 psymtab_to_symtab (struct partial_symtab
*pst
)
268 /* If it's been looked up before, return it. */
272 /* If it has not yet been read in, read it. */
275 struct cleanup
*back_to
= make_cleanup (decrement_reading_symtab
, NULL
);
276 currently_reading_symtab
++;
277 (*pst
->read_symtab
) (pst
);
278 do_cleanups (back_to
);
284 /* Remember the lowest-addressed loadable section we've seen.
285 This function is called via bfd_map_over_sections.
287 In case of equal vmas, the section with the largest size becomes the
288 lowest-addressed loadable section.
290 If the vmas and sizes are equal, the last section is considered the
291 lowest-addressed loadable section. */
294 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
296 asection
**lowest
= (asection
**) obj
;
298 if (0 == (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
))
301 *lowest
= sect
; /* First loadable section */
302 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
303 *lowest
= sect
; /* A lower loadable section */
304 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
305 && (bfd_section_size (abfd
, (*lowest
))
306 <= bfd_section_size (abfd
, sect
)))
310 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
312 struct section_addr_info
*
313 alloc_section_addr_info (size_t num_sections
)
315 struct section_addr_info
*sap
;
318 size
= (sizeof (struct section_addr_info
)
319 + sizeof (struct other_sections
) * (num_sections
- 1));
320 sap
= (struct section_addr_info
*) xmalloc (size
);
321 memset (sap
, 0, size
);
322 sap
->num_sections
= num_sections
;
328 /* Return a freshly allocated copy of ADDRS. The section names, if
329 any, are also freshly allocated copies of those in ADDRS. */
330 struct section_addr_info
*
331 copy_section_addr_info (struct section_addr_info
*addrs
)
333 struct section_addr_info
*copy
334 = alloc_section_addr_info (addrs
->num_sections
);
337 copy
->num_sections
= addrs
->num_sections
;
338 for (i
= 0; i
< addrs
->num_sections
; i
++)
340 copy
->other
[i
].addr
= addrs
->other
[i
].addr
;
341 if (addrs
->other
[i
].name
)
342 copy
->other
[i
].name
= xstrdup (addrs
->other
[i
].name
);
344 copy
->other
[i
].name
= NULL
;
345 copy
->other
[i
].sectindex
= addrs
->other
[i
].sectindex
;
353 /* Build (allocate and populate) a section_addr_info struct from
354 an existing section table. */
356 extern struct section_addr_info
*
357 build_section_addr_info_from_section_table (const struct section_table
*start
,
358 const struct section_table
*end
)
360 struct section_addr_info
*sap
;
361 const struct section_table
*stp
;
364 sap
= alloc_section_addr_info (end
- start
);
366 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
368 if (bfd_get_section_flags (stp
->bfd
,
369 stp
->the_bfd_section
) & (SEC_ALLOC
| SEC_LOAD
)
370 && oidx
< end
- start
)
372 sap
->other
[oidx
].addr
= stp
->addr
;
373 sap
->other
[oidx
].name
374 = xstrdup (bfd_section_name (stp
->bfd
, stp
->the_bfd_section
));
375 sap
->other
[oidx
].sectindex
= stp
->the_bfd_section
->index
;
384 /* Free all memory allocated by build_section_addr_info_from_section_table. */
387 free_section_addr_info (struct section_addr_info
*sap
)
391 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
392 if (sap
->other
[idx
].name
)
393 xfree (sap
->other
[idx
].name
);
398 /* Initialize OBJFILE's sect_index_* members. */
400 init_objfile_sect_indices (struct objfile
*objfile
)
405 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
407 objfile
->sect_index_text
= sect
->index
;
409 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
411 objfile
->sect_index_data
= sect
->index
;
413 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
415 objfile
->sect_index_bss
= sect
->index
;
417 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
419 objfile
->sect_index_rodata
= sect
->index
;
421 /* This is where things get really weird... We MUST have valid
422 indices for the various sect_index_* members or gdb will abort.
423 So if for example, there is no ".text" section, we have to
424 accomodate that. Except when explicitly adding symbol files at
425 some address, section_offsets contains nothing but zeros, so it
426 doesn't matter which slot in section_offsets the individual
427 sect_index_* members index into. So if they are all zero, it is
428 safe to just point all the currently uninitialized indices to the
431 for (i
= 0; i
< objfile
->num_sections
; i
++)
433 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
438 if (i
== objfile
->num_sections
)
440 if (objfile
->sect_index_text
== -1)
441 objfile
->sect_index_text
= 0;
442 if (objfile
->sect_index_data
== -1)
443 objfile
->sect_index_data
= 0;
444 if (objfile
->sect_index_bss
== -1)
445 objfile
->sect_index_bss
= 0;
446 if (objfile
->sect_index_rodata
== -1)
447 objfile
->sect_index_rodata
= 0;
452 /* Parse the user's idea of an offset for dynamic linking, into our idea
453 of how to represent it for fast symbol reading. This is the default
454 version of the sym_fns.sym_offsets function for symbol readers that
455 don't need to do anything special. It allocates a section_offsets table
456 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
459 default_symfile_offsets (struct objfile
*objfile
,
460 struct section_addr_info
*addrs
)
464 objfile
->num_sections
= bfd_count_sections (objfile
->obfd
);
465 objfile
->section_offsets
= (struct section_offsets
*)
466 obstack_alloc (&objfile
->objfile_obstack
,
467 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
468 memset (objfile
->section_offsets
, 0,
469 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
471 /* Now calculate offsets for section that were specified by the
473 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
475 struct other_sections
*osp
;
477 osp
= &addrs
->other
[i
] ;
481 /* Record all sections in offsets */
482 /* The section_offsets in the objfile are here filled in using
484 (objfile
->section_offsets
)->offsets
[osp
->sectindex
] = osp
->addr
;
487 /* Remember the bfd indexes for the .text, .data, .bss and
489 init_objfile_sect_indices (objfile
);
493 /* Process a symbol file, as either the main file or as a dynamically
496 OBJFILE is where the symbols are to be read from.
498 ADDRS is the list of section load addresses. If the user has given
499 an 'add-symbol-file' command, then this is the list of offsets and
500 addresses he or she provided as arguments to the command; or, if
501 we're handling a shared library, these are the actual addresses the
502 sections are loaded at, according to the inferior's dynamic linker
503 (as gleaned by GDB's shared library code). We convert each address
504 into an offset from the section VMA's as it appears in the object
505 file, and then call the file's sym_offsets function to convert this
506 into a format-specific offset table --- a `struct section_offsets'.
507 If ADDRS is non-zero, OFFSETS must be zero.
509 OFFSETS is a table of section offsets already in the right
510 format-specific representation. NUM_OFFSETS is the number of
511 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
512 assume this is the proper table the call to sym_offsets described
513 above would produce. Instead of calling sym_offsets, we just dump
514 it right into objfile->section_offsets. (When we're re-reading
515 symbols from an objfile, we don't have the original load address
516 list any more; all we have is the section offset table.) If
517 OFFSETS is non-zero, ADDRS must be zero.
519 MAINLINE is nonzero if this is the main symbol file, or zero if
520 it's an extra symbol file such as dynamically loaded code.
522 VERBO is nonzero if the caller has printed a verbose message about
523 the symbol reading (and complaints can be more terse about it). */
526 syms_from_objfile (struct objfile
*objfile
,
527 struct section_addr_info
*addrs
,
528 struct section_offsets
*offsets
,
533 struct section_addr_info
*local_addr
= NULL
;
534 struct cleanup
*old_chain
;
536 gdb_assert (! (addrs
&& offsets
));
538 init_entry_point_info (objfile
);
539 find_sym_fns (objfile
);
541 if (objfile
->sf
== NULL
)
542 return; /* No symbols. */
544 /* Make sure that partially constructed symbol tables will be cleaned up
545 if an error occurs during symbol reading. */
546 old_chain
= make_cleanup_free_objfile (objfile
);
548 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
549 list. We now establish the convention that an addr of zero means
550 no load address was specified. */
551 if (! addrs
&& ! offsets
)
554 = alloc_section_addr_info (bfd_count_sections (objfile
->obfd
));
555 make_cleanup (xfree
, local_addr
);
559 /* Now either addrs or offsets is non-zero. */
563 /* We will modify the main symbol table, make sure that all its users
564 will be cleaned up if an error occurs during symbol reading. */
565 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
567 /* Since no error yet, throw away the old symbol table. */
569 if (symfile_objfile
!= NULL
)
571 free_objfile (symfile_objfile
);
572 symfile_objfile
= NULL
;
575 /* Currently we keep symbols from the add-symbol-file command.
576 If the user wants to get rid of them, they should do "symbol-file"
577 without arguments first. Not sure this is the best behavior
580 (*objfile
->sf
->sym_new_init
) (objfile
);
583 /* Convert addr into an offset rather than an absolute address.
584 We find the lowest address of a loaded segment in the objfile,
585 and assume that <addr> is where that got loaded.
587 We no longer warn if the lowest section is not a text segment (as
588 happens for the PA64 port. */
589 if (!mainline
&& addrs
&& addrs
->other
[0].name
)
591 asection
*lower_sect
;
593 CORE_ADDR lower_offset
;
596 /* Find lowest loadable section to be used as starting point for
597 continguous sections. FIXME!! won't work without call to find
598 .text first, but this assumes text is lowest section. */
599 lower_sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
600 if (lower_sect
== NULL
)
601 bfd_map_over_sections (objfile
->obfd
, find_lowest_section
,
603 if (lower_sect
== NULL
)
604 warning ("no loadable sections found in added symbol-file %s",
607 if ((bfd_get_section_flags (objfile
->obfd
, lower_sect
) & SEC_CODE
) == 0)
608 warning ("Lowest section in %s is %s at %s",
610 bfd_section_name (objfile
->obfd
, lower_sect
),
611 paddr (bfd_section_vma (objfile
->obfd
, lower_sect
)));
612 if (lower_sect
!= NULL
)
613 lower_offset
= bfd_section_vma (objfile
->obfd
, lower_sect
);
617 /* Calculate offsets for the loadable sections.
618 FIXME! Sections must be in order of increasing loadable section
619 so that contiguous sections can use the lower-offset!!!
621 Adjust offsets if the segments are not contiguous.
622 If the section is contiguous, its offset should be set to
623 the offset of the highest loadable section lower than it
624 (the loadable section directly below it in memory).
625 this_offset = lower_offset = lower_addr - lower_orig_addr */
627 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
629 if (addrs
->other
[i
].addr
!= 0)
631 sect
= bfd_get_section_by_name (objfile
->obfd
,
632 addrs
->other
[i
].name
);
636 -= bfd_section_vma (objfile
->obfd
, sect
);
637 lower_offset
= addrs
->other
[i
].addr
;
638 /* This is the index used by BFD. */
639 addrs
->other
[i
].sectindex
= sect
->index
;
643 warning ("section %s not found in %s",
644 addrs
->other
[i
].name
,
646 addrs
->other
[i
].addr
= 0;
650 addrs
->other
[i
].addr
= lower_offset
;
654 /* Initialize symbol reading routines for this objfile, allow complaints to
655 appear for this new file, and record how verbose to be, then do the
656 initial symbol reading for this file. */
658 (*objfile
->sf
->sym_init
) (objfile
);
659 clear_complaints (&symfile_complaints
, 1, verbo
);
662 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
665 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_offsets
);
667 /* Just copy in the offset table directly as given to us. */
668 objfile
->num_sections
= num_offsets
;
669 objfile
->section_offsets
670 = ((struct section_offsets
*)
671 obstack_alloc (&objfile
->objfile_obstack
, size
));
672 memcpy (objfile
->section_offsets
, offsets
, size
);
674 init_objfile_sect_indices (objfile
);
677 #ifndef DEPRECATED_IBM6000_TARGET
678 /* This is a SVR4/SunOS specific hack, I think. In any event, it
679 screws RS/6000. sym_offsets should be doing this sort of thing,
680 because it knows the mapping between bfd sections and
682 /* This is a hack. As far as I can tell, section offsets are not
683 target dependent. They are all set to addr with a couple of
684 exceptions. The exceptions are sysvr4 shared libraries, whose
685 offsets are kept in solib structures anyway and rs6000 xcoff
686 which handles shared libraries in a completely unique way.
688 Section offsets are built similarly, except that they are built
689 by adding addr in all cases because there is no clear mapping
690 from section_offsets into actual sections. Note that solib.c
691 has a different algorithm for finding section offsets.
693 These should probably all be collapsed into some target
694 independent form of shared library support. FIXME. */
698 struct obj_section
*s
;
700 /* Map section offsets in "addr" back to the object's
701 sections by comparing the section names with bfd's
702 section names. Then adjust the section address by
703 the offset. */ /* for gdb/13815 */
705 ALL_OBJFILE_OSECTIONS (objfile
, s
)
707 CORE_ADDR s_addr
= 0;
711 !s_addr
&& i
< addrs
->num_sections
&& addrs
->other
[i
].name
;
713 if (strcmp (bfd_section_name (s
->objfile
->obfd
,
715 addrs
->other
[i
].name
) == 0)
716 s_addr
= addrs
->other
[i
].addr
; /* end added for gdb/13815 */
718 s
->addr
-= s
->offset
;
720 s
->endaddr
-= s
->offset
;
721 s
->endaddr
+= s_addr
;
725 #endif /* not DEPRECATED_IBM6000_TARGET */
727 (*objfile
->sf
->sym_read
) (objfile
, mainline
);
729 /* Don't allow char * to have a typename (else would get caddr_t).
730 Ditto void *. FIXME: Check whether this is now done by all the
731 symbol readers themselves (many of them now do), and if so remove
734 TYPE_NAME (lookup_pointer_type (builtin_type_char
)) = 0;
735 TYPE_NAME (lookup_pointer_type (builtin_type_void
)) = 0;
737 /* Mark the objfile has having had initial symbol read attempted. Note
738 that this does not mean we found any symbols... */
740 objfile
->flags
|= OBJF_SYMS
;
742 /* Discard cleanups as symbol reading was successful. */
744 discard_cleanups (old_chain
);
747 /* Perform required actions after either reading in the initial
748 symbols for a new objfile, or mapping in the symbols from a reusable
752 new_symfile_objfile (struct objfile
*objfile
, int mainline
, int verbo
)
755 /* If this is the main symbol file we have to clean up all users of the
756 old main symbol file. Otherwise it is sufficient to fixup all the
757 breakpoints that may have been redefined by this symbol file. */
760 /* OK, make it the "real" symbol file. */
761 symfile_objfile
= objfile
;
763 clear_symtab_users ();
767 breakpoint_re_set ();
770 /* We're done reading the symbol file; finish off complaints. */
771 clear_complaints (&symfile_complaints
, 0, verbo
);
774 /* Process a symbol file, as either the main file or as a dynamically
777 ABFD is a BFD already open on the file, as from symfile_bfd_open.
778 This BFD will be closed on error, and is always consumed by this function.
780 FROM_TTY says how verbose to be.
782 MAINLINE specifies whether this is the main symbol file, or whether
783 it's an extra symbol file such as dynamically loaded code.
785 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
786 syms_from_objfile, above. ADDRS is ignored when MAINLINE is
789 Upon success, returns a pointer to the objfile that was added.
790 Upon failure, jumps back to command level (never returns). */
791 static struct objfile
*
792 symbol_file_add_with_addrs_or_offsets (bfd
*abfd
, int from_tty
,
793 struct section_addr_info
*addrs
,
794 struct section_offsets
*offsets
,
796 int mainline
, int flags
)
798 struct objfile
*objfile
;
799 struct partial_symtab
*psymtab
;
801 struct section_addr_info
*orig_addrs
= NULL
;
802 struct cleanup
*my_cleanups
;
803 const char *name
= bfd_get_filename (abfd
);
805 my_cleanups
= make_cleanup_bfd_close (abfd
);
807 /* Give user a chance to burp if we'd be
808 interactively wiping out any existing symbols. */
810 if ((have_full_symbols () || have_partial_symbols ())
813 && !query ("Load new symbol table from \"%s\"? ", name
))
814 error ("Not confirmed.");
816 objfile
= allocate_objfile (abfd
, flags
);
817 discard_cleanups (my_cleanups
);
821 orig_addrs
= copy_section_addr_info (addrs
);
822 make_cleanup_free_section_addr_info (orig_addrs
);
825 /* We either created a new mapped symbol table, mapped an existing
826 symbol table file which has not had initial symbol reading
827 performed, or need to read an unmapped symbol table. */
828 if (from_tty
|| info_verbose
)
830 if (deprecated_pre_add_symbol_hook
)
831 deprecated_pre_add_symbol_hook (name
);
834 printf_unfiltered ("Reading symbols from %s...", name
);
836 gdb_flush (gdb_stdout
);
839 syms_from_objfile (objfile
, addrs
, offsets
, num_offsets
,
842 /* We now have at least a partial symbol table. Check to see if the
843 user requested that all symbols be read on initial access via either
844 the gdb startup command line or on a per symbol file basis. Expand
845 all partial symbol tables for this objfile if so. */
847 if ((flags
& OBJF_READNOW
) || readnow_symbol_files
)
849 if (from_tty
|| info_verbose
)
851 printf_unfiltered ("expanding to full symbols...");
853 gdb_flush (gdb_stdout
);
856 for (psymtab
= objfile
->psymtabs
;
858 psymtab
= psymtab
->next
)
860 psymtab_to_symtab (psymtab
);
864 debugfile
= find_separate_debug_file (objfile
);
869 objfile
->separate_debug_objfile
870 = symbol_file_add (debugfile
, from_tty
, orig_addrs
, 0, flags
);
874 objfile
->separate_debug_objfile
875 = symbol_file_add (debugfile
, from_tty
, NULL
, 0, flags
);
877 objfile
->separate_debug_objfile
->separate_debug_objfile_backlink
880 /* Put the separate debug object before the normal one, this is so that
881 usage of the ALL_OBJFILES_SAFE macro will stay safe. */
882 put_objfile_before (objfile
->separate_debug_objfile
, objfile
);
887 if (!have_partial_symbols () && !have_full_symbols ())
890 printf_filtered ("(no debugging symbols found)");
891 if (from_tty
|| info_verbose
)
892 printf_filtered ("...");
894 printf_filtered ("\n");
898 if (from_tty
|| info_verbose
)
900 if (deprecated_post_add_symbol_hook
)
901 deprecated_post_add_symbol_hook ();
904 printf_unfiltered ("done.\n");
908 /* We print some messages regardless of whether 'from_tty ||
909 info_verbose' is true, so make sure they go out at the right
911 gdb_flush (gdb_stdout
);
913 do_cleanups (my_cleanups
);
915 if (objfile
->sf
== NULL
)
916 return objfile
; /* No symbols. */
918 new_symfile_objfile (objfile
, mainline
, from_tty
);
920 if (deprecated_target_new_objfile_hook
)
921 deprecated_target_new_objfile_hook (objfile
);
923 bfd_cache_close_all ();
928 /* Process the symbol file ABFD, as either the main file or as a
929 dynamically loaded file.
931 See symbol_file_add_with_addrs_or_offsets's comments for
934 symbol_file_add_from_bfd (bfd
*abfd
, int from_tty
,
935 struct section_addr_info
*addrs
,
936 int mainline
, int flags
)
938 return symbol_file_add_with_addrs_or_offsets (abfd
,
939 from_tty
, addrs
, 0, 0,
944 /* Process a symbol file, as either the main file or as a dynamically
945 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
948 symbol_file_add (char *name
, int from_tty
, struct section_addr_info
*addrs
,
949 int mainline
, int flags
)
951 return symbol_file_add_from_bfd (symfile_bfd_open (name
), from_tty
,
952 addrs
, mainline
, flags
);
956 /* Call symbol_file_add() with default values and update whatever is
957 affected by the loading of a new main().
958 Used when the file is supplied in the gdb command line
959 and by some targets with special loading requirements.
960 The auxiliary function, symbol_file_add_main_1(), has the flags
961 argument for the switches that can only be specified in the symbol_file
965 symbol_file_add_main (char *args
, int from_tty
)
967 symbol_file_add_main_1 (args
, from_tty
, 0);
971 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
973 symbol_file_add (args
, from_tty
, NULL
, 1, flags
);
975 /* Getting new symbols may change our opinion about
976 what is frameless. */
977 reinit_frame_cache ();
979 set_initial_language ();
983 symbol_file_clear (int from_tty
)
985 if ((have_full_symbols () || have_partial_symbols ())
987 && !query ("Discard symbol table from `%s'? ",
988 symfile_objfile
->name
))
989 error ("Not confirmed.");
990 free_all_objfiles ();
992 /* solib descriptors may have handles to objfiles. Since their
993 storage has just been released, we'd better wipe the solib
996 #if defined(SOLIB_RESTART)
1000 symfile_objfile
= NULL
;
1002 printf_unfiltered ("No symbol file now.\n");
1006 get_debug_link_info (struct objfile
*objfile
, unsigned long *crc32_out
)
1009 bfd_size_type debuglink_size
;
1010 unsigned long crc32
;
1015 sect
= bfd_get_section_by_name (objfile
->obfd
, ".gnu_debuglink");
1020 debuglink_size
= bfd_section_size (objfile
->obfd
, sect
);
1022 contents
= xmalloc (debuglink_size
);
1023 bfd_get_section_contents (objfile
->obfd
, sect
, contents
,
1024 (file_ptr
)0, (bfd_size_type
)debuglink_size
);
1026 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1027 crc_offset
= strlen (contents
) + 1;
1028 crc_offset
= (crc_offset
+ 3) & ~3;
1030 crc32
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) (contents
+ crc_offset
));
1037 separate_debug_file_exists (const char *name
, unsigned long crc
)
1039 unsigned long file_crc
= 0;
1041 char buffer
[8*1024];
1044 fd
= open (name
, O_RDONLY
| O_BINARY
);
1048 while ((count
= read (fd
, buffer
, sizeof (buffer
))) > 0)
1049 file_crc
= gnu_debuglink_crc32 (file_crc
, buffer
, count
);
1053 return crc
== file_crc
;
1056 static char *debug_file_directory
= NULL
;
1058 #if ! defined (DEBUG_SUBDIRECTORY)
1059 #define DEBUG_SUBDIRECTORY ".debug"
1063 find_separate_debug_file (struct objfile
*objfile
)
1070 bfd_size_type debuglink_size
;
1071 unsigned long crc32
;
1074 basename
= get_debug_link_info (objfile
, &crc32
);
1076 if (basename
== NULL
)
1079 dir
= xstrdup (objfile
->name
);
1081 /* Strip off the final filename part, leaving the directory name,
1082 followed by a slash. Objfile names should always be absolute and
1083 tilde-expanded, so there should always be a slash in there
1085 for (i
= strlen(dir
) - 1; i
>= 0; i
--)
1087 if (IS_DIR_SEPARATOR (dir
[i
]))
1090 gdb_assert (i
>= 0 && IS_DIR_SEPARATOR (dir
[i
]));
1093 debugfile
= alloca (strlen (debug_file_directory
) + 1
1095 + strlen (DEBUG_SUBDIRECTORY
)
1100 /* First try in the same directory as the original file. */
1101 strcpy (debugfile
, dir
);
1102 strcat (debugfile
, basename
);
1104 if (separate_debug_file_exists (debugfile
, crc32
))
1108 return xstrdup (debugfile
);
1111 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1112 strcpy (debugfile
, dir
);
1113 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1114 strcat (debugfile
, "/");
1115 strcat (debugfile
, basename
);
1117 if (separate_debug_file_exists (debugfile
, crc32
))
1121 return xstrdup (debugfile
);
1124 /* Then try in the global debugfile directory. */
1125 strcpy (debugfile
, debug_file_directory
);
1126 strcat (debugfile
, "/");
1127 strcat (debugfile
, dir
);
1128 strcat (debugfile
, basename
);
1130 if (separate_debug_file_exists (debugfile
, crc32
))
1134 return xstrdup (debugfile
);
1143 /* This is the symbol-file command. Read the file, analyze its
1144 symbols, and add a struct symtab to a symtab list. The syntax of
1145 the command is rather bizarre--(1) buildargv implements various
1146 quoting conventions which are undocumented and have little or
1147 nothing in common with the way things are quoted (or not quoted)
1148 elsewhere in GDB, (2) options are used, which are not generally
1149 used in GDB (perhaps "set mapped on", "set readnow on" would be
1150 better), (3) the order of options matters, which is contrary to GNU
1151 conventions (because it is confusing and inconvenient). */
1152 /* Note: ezannoni 2000-04-17. This function used to have support for
1153 rombug (see remote-os9k.c). It consisted of a call to target_link()
1154 (target.c) to get the address of the text segment from the target,
1155 and pass that to symbol_file_add(). This is no longer supported. */
1158 symbol_file_command (char *args
, int from_tty
)
1162 struct cleanup
*cleanups
;
1163 int flags
= OBJF_USERLOADED
;
1169 symbol_file_clear (from_tty
);
1173 if ((argv
= buildargv (args
)) == NULL
)
1177 cleanups
= make_cleanup_freeargv (argv
);
1178 while (*argv
!= NULL
)
1180 if (strcmp (*argv
, "-readnow") == 0)
1181 flags
|= OBJF_READNOW
;
1182 else if (**argv
== '-')
1183 error ("unknown option `%s'", *argv
);
1188 symbol_file_add_main_1 (name
, from_tty
, flags
);
1195 error ("no symbol file name was specified");
1197 do_cleanups (cleanups
);
1201 /* Set the initial language.
1203 A better solution would be to record the language in the psymtab when reading
1204 partial symbols, and then use it (if known) to set the language. This would
1205 be a win for formats that encode the language in an easily discoverable place,
1206 such as DWARF. For stabs, we can jump through hoops looking for specially
1207 named symbols or try to intuit the language from the specific type of stabs
1208 we find, but we can't do that until later when we read in full symbols.
1212 set_initial_language (void)
1214 struct partial_symtab
*pst
;
1215 enum language lang
= language_unknown
;
1217 pst
= find_main_psymtab ();
1220 if (pst
->filename
!= NULL
)
1222 lang
= deduce_language_from_filename (pst
->filename
);
1224 if (lang
== language_unknown
)
1226 /* Make C the default language */
1229 set_language (lang
);
1230 expected_language
= current_language
; /* Don't warn the user */
1234 /* Open file specified by NAME and hand it off to BFD for preliminary
1235 analysis. Result is a newly initialized bfd *, which includes a newly
1236 malloc'd` copy of NAME (tilde-expanded and made absolute).
1237 In case of trouble, error() is called. */
1240 symfile_bfd_open (char *name
)
1244 char *absolute_name
;
1248 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy */
1250 /* Look down path for it, allocate 2nd new malloc'd copy. */
1251 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, name
, O_RDONLY
| O_BINARY
,
1253 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1256 char *exename
= alloca (strlen (name
) + 5);
1257 strcat (strcpy (exename
, name
), ".exe");
1258 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, exename
,
1259 O_RDONLY
| O_BINARY
, 0, &absolute_name
);
1264 make_cleanup (xfree
, name
);
1265 perror_with_name (name
);
1267 xfree (name
); /* Free 1st new malloc'd copy */
1268 name
= absolute_name
; /* Keep 2nd malloc'd copy in bfd */
1269 /* It'll be freed in free_objfile(). */
1271 sym_bfd
= bfd_fdopenr (name
, gnutarget
, desc
);
1275 make_cleanup (xfree
, name
);
1276 error ("\"%s\": can't open to read symbols: %s.", name
,
1277 bfd_errmsg (bfd_get_error ()));
1279 bfd_set_cacheable (sym_bfd
, 1);
1281 if (!bfd_check_format (sym_bfd
, bfd_object
))
1283 /* FIXME: should be checking for errors from bfd_close (for one thing,
1284 on error it does not free all the storage associated with the
1286 bfd_close (sym_bfd
); /* This also closes desc */
1287 make_cleanup (xfree
, name
);
1288 error ("\"%s\": can't read symbols: %s.", name
,
1289 bfd_errmsg (bfd_get_error ()));
1294 /* Return the section index for the given section name. Return -1 if
1295 the section was not found. */
1297 get_section_index (struct objfile
*objfile
, char *section_name
)
1299 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1306 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1307 startup by the _initialize routine in each object file format reader,
1308 to register information about each format the the reader is prepared
1312 add_symtab_fns (struct sym_fns
*sf
)
1314 sf
->next
= symtab_fns
;
1319 /* Initialize to read symbols from the symbol file sym_bfd. It either
1320 returns or calls error(). The result is an initialized struct sym_fns
1321 in the objfile structure, that contains cached information about the
1325 find_sym_fns (struct objfile
*objfile
)
1328 enum bfd_flavour our_flavour
= bfd_get_flavour (objfile
->obfd
);
1329 char *our_target
= bfd_get_target (objfile
->obfd
);
1331 if (our_flavour
== bfd_target_srec_flavour
1332 || our_flavour
== bfd_target_ihex_flavour
1333 || our_flavour
== bfd_target_tekhex_flavour
)
1334 return; /* No symbols. */
1336 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
->next
)
1338 if (our_flavour
== sf
->sym_flavour
)
1344 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
1345 bfd_get_target (objfile
->obfd
));
1348 /* This function runs the load command of our current target. */
1351 load_command (char *arg
, int from_tty
)
1354 arg
= get_exec_file (1);
1355 target_load (arg
, from_tty
);
1357 /* After re-loading the executable, we don't really know which
1358 overlays are mapped any more. */
1359 overlay_cache_invalid
= 1;
1362 /* This version of "load" should be usable for any target. Currently
1363 it is just used for remote targets, not inftarg.c or core files,
1364 on the theory that only in that case is it useful.
1366 Avoiding xmodem and the like seems like a win (a) because we don't have
1367 to worry about finding it, and (b) On VMS, fork() is very slow and so
1368 we don't want to run a subprocess. On the other hand, I'm not sure how
1369 performance compares. */
1371 static int download_write_size
= 512;
1372 static int validate_download
= 0;
1374 /* Callback service function for generic_load (bfd_map_over_sections). */
1377 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1379 bfd_size_type
*sum
= data
;
1381 *sum
+= bfd_get_section_size (asec
);
1384 /* Opaque data for load_section_callback. */
1385 struct load_section_data
{
1386 unsigned long load_offset
;
1387 unsigned long write_count
;
1388 unsigned long data_count
;
1389 bfd_size_type total_size
;
1392 /* Callback service function for generic_load (bfd_map_over_sections). */
1395 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1397 struct load_section_data
*args
= data
;
1399 if (bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
)
1401 bfd_size_type size
= bfd_get_section_size (asec
);
1405 struct cleanup
*old_chain
;
1406 CORE_ADDR lma
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1407 bfd_size_type block_size
;
1409 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1412 if (download_write_size
> 0 && size
> download_write_size
)
1413 block_size
= download_write_size
;
1417 buffer
= xmalloc (size
);
1418 old_chain
= make_cleanup (xfree
, buffer
);
1420 /* Is this really necessary? I guess it gives the user something
1421 to look at during a long download. */
1422 ui_out_message (uiout
, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1423 sect_name
, paddr_nz (size
), paddr_nz (lma
));
1425 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1431 bfd_size_type this_transfer
= size
- sent
;
1433 if (this_transfer
>= block_size
)
1434 this_transfer
= block_size
;
1435 len
= target_write_memory_partial (lma
, buffer
,
1436 this_transfer
, &err
);
1439 if (validate_download
)
1441 /* Broken memories and broken monitors manifest
1442 themselves here when bring new computers to
1443 life. This doubles already slow downloads. */
1444 /* NOTE: cagney/1999-10-18: A more efficient
1445 implementation might add a verify_memory()
1446 method to the target vector and then use
1447 that. remote.c could implement that method
1448 using the ``qCRC'' packet. */
1449 char *check
= xmalloc (len
);
1450 struct cleanup
*verify_cleanups
=
1451 make_cleanup (xfree
, check
);
1453 if (target_read_memory (lma
, check
, len
) != 0)
1454 error ("Download verify read failed at 0x%s",
1456 if (memcmp (buffer
, check
, len
) != 0)
1457 error ("Download verify compare failed at 0x%s",
1459 do_cleanups (verify_cleanups
);
1461 args
->data_count
+= len
;
1464 args
->write_count
+= 1;
1467 || (deprecated_ui_load_progress_hook
!= NULL
1468 && deprecated_ui_load_progress_hook (sect_name
, sent
)))
1469 error ("Canceled the download");
1471 if (deprecated_show_load_progress
!= NULL
)
1472 deprecated_show_load_progress (sect_name
, sent
, size
,
1476 while (sent
< size
);
1479 error ("Memory access error while loading section %s.", sect_name
);
1481 do_cleanups (old_chain
);
1487 generic_load (char *args
, int from_tty
)
1491 time_t start_time
, end_time
; /* Start and end times of download */
1493 struct cleanup
*old_cleanups
;
1495 struct load_section_data cbdata
;
1498 cbdata
.load_offset
= 0; /* Offset to add to vma for each section. */
1499 cbdata
.write_count
= 0; /* Number of writes needed. */
1500 cbdata
.data_count
= 0; /* Number of bytes written to target memory. */
1501 cbdata
.total_size
= 0; /* Total size of all bfd sectors. */
1503 /* Parse the input argument - the user can specify a load offset as
1504 a second argument. */
1505 filename
= xmalloc (strlen (args
) + 1);
1506 old_cleanups
= make_cleanup (xfree
, filename
);
1507 strcpy (filename
, args
);
1508 offptr
= strchr (filename
, ' ');
1513 cbdata
.load_offset
= strtoul (offptr
, &endptr
, 0);
1514 if (offptr
== endptr
)
1515 error ("Invalid download offset:%s\n", offptr
);
1519 cbdata
.load_offset
= 0;
1521 /* Open the file for loading. */
1522 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
1523 if (loadfile_bfd
== NULL
)
1525 perror_with_name (filename
);
1529 /* FIXME: should be checking for errors from bfd_close (for one thing,
1530 on error it does not free all the storage associated with the
1532 make_cleanup_bfd_close (loadfile_bfd
);
1534 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
1536 error ("\"%s\" is not an object file: %s", filename
,
1537 bfd_errmsg (bfd_get_error ()));
1540 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
1541 (void *) &cbdata
.total_size
);
1543 start_time
= time (NULL
);
1545 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
1547 end_time
= time (NULL
);
1549 entry
= bfd_get_start_address (loadfile_bfd
);
1550 ui_out_text (uiout
, "Start address ");
1551 ui_out_field_fmt (uiout
, "address", "0x%s", paddr_nz (entry
));
1552 ui_out_text (uiout
, ", load size ");
1553 ui_out_field_fmt (uiout
, "load-size", "%lu", cbdata
.data_count
);
1554 ui_out_text (uiout
, "\n");
1555 /* We were doing this in remote-mips.c, I suspect it is right
1556 for other targets too. */
1559 /* FIXME: are we supposed to call symbol_file_add or not? According
1560 to a comment from remote-mips.c (where a call to symbol_file_add
1561 was commented out), making the call confuses GDB if more than one
1562 file is loaded in. Some targets do (e.g., remote-vx.c) but
1563 others don't (or didn't - perhaps they have all been deleted). */
1565 print_transfer_performance (gdb_stdout
, cbdata
.data_count
,
1566 cbdata
.write_count
, end_time
- start_time
);
1568 do_cleanups (old_cleanups
);
1571 /* Report how fast the transfer went. */
1573 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1574 replaced by print_transfer_performance (with a very different
1575 function signature). */
1578 report_transfer_performance (unsigned long data_count
, time_t start_time
,
1581 print_transfer_performance (gdb_stdout
, data_count
,
1582 end_time
- start_time
, 0);
1586 print_transfer_performance (struct ui_file
*stream
,
1587 unsigned long data_count
,
1588 unsigned long write_count
,
1589 unsigned long time_count
)
1591 ui_out_text (uiout
, "Transfer rate: ");
1594 ui_out_field_fmt (uiout
, "transfer-rate", "%lu",
1595 (data_count
* 8) / time_count
);
1596 ui_out_text (uiout
, " bits/sec");
1600 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
1601 ui_out_text (uiout
, " bits in <1 sec");
1603 if (write_count
> 0)
1605 ui_out_text (uiout
, ", ");
1606 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
1607 ui_out_text (uiout
, " bytes/write");
1609 ui_out_text (uiout
, ".\n");
1612 /* This function allows the addition of incrementally linked object files.
1613 It does not modify any state in the target, only in the debugger. */
1614 /* Note: ezannoni 2000-04-13 This function/command used to have a
1615 special case syntax for the rombug target (Rombug is the boot
1616 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
1617 rombug case, the user doesn't need to supply a text address,
1618 instead a call to target_link() (in target.c) would supply the
1619 value to use. We are now discontinuing this type of ad hoc syntax. */
1622 add_symbol_file_command (char *args
, int from_tty
)
1624 char *filename
= NULL
;
1625 int flags
= OBJF_USERLOADED
;
1627 int expecting_option
= 0;
1628 int section_index
= 0;
1632 int expecting_sec_name
= 0;
1633 int expecting_sec_addr
= 0;
1641 struct section_addr_info
*section_addrs
;
1642 struct sect_opt
*sect_opts
= NULL
;
1643 size_t num_sect_opts
= 0;
1644 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
1647 sect_opts
= (struct sect_opt
*) xmalloc (num_sect_opts
1648 * sizeof (struct sect_opt
));
1653 error ("add-symbol-file takes a file name and an address");
1655 /* Make a copy of the string that we can safely write into. */
1656 args
= xstrdup (args
);
1658 while (*args
!= '\000')
1660 /* Any leading spaces? */
1661 while (isspace (*args
))
1664 /* Point arg to the beginning of the argument. */
1667 /* Move args pointer over the argument. */
1668 while ((*args
!= '\000') && !isspace (*args
))
1671 /* If there are more arguments, terminate arg and
1673 if (*args
!= '\000')
1676 /* Now process the argument. */
1679 /* The first argument is the file name. */
1680 filename
= tilde_expand (arg
);
1681 make_cleanup (xfree
, filename
);
1686 /* The second argument is always the text address at which
1687 to load the program. */
1688 sect_opts
[section_index
].name
= ".text";
1689 sect_opts
[section_index
].value
= arg
;
1690 if (++section_index
> num_sect_opts
)
1693 sect_opts
= ((struct sect_opt
*)
1694 xrealloc (sect_opts
,
1696 * sizeof (struct sect_opt
)));
1701 /* It's an option (starting with '-') or it's an argument
1706 if (strcmp (arg
, "-readnow") == 0)
1707 flags
|= OBJF_READNOW
;
1708 else if (strcmp (arg
, "-s") == 0)
1710 expecting_sec_name
= 1;
1711 expecting_sec_addr
= 1;
1716 if (expecting_sec_name
)
1718 sect_opts
[section_index
].name
= arg
;
1719 expecting_sec_name
= 0;
1722 if (expecting_sec_addr
)
1724 sect_opts
[section_index
].value
= arg
;
1725 expecting_sec_addr
= 0;
1726 if (++section_index
> num_sect_opts
)
1729 sect_opts
= ((struct sect_opt
*)
1730 xrealloc (sect_opts
,
1732 * sizeof (struct sect_opt
)));
1736 error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*");
1742 /* Print the prompt for the query below. And save the arguments into
1743 a sect_addr_info structure to be passed around to other
1744 functions. We have to split this up into separate print
1745 statements because local_hex_string returns a local static
1748 printf_unfiltered ("add symbol table from file \"%s\" at\n", filename
);
1749 section_addrs
= alloc_section_addr_info (section_index
);
1750 make_cleanup (xfree
, section_addrs
);
1751 for (i
= 0; i
< section_index
; i
++)
1754 char *val
= sect_opts
[i
].value
;
1755 char *sec
= sect_opts
[i
].name
;
1757 addr
= parse_and_eval_address (val
);
1759 /* Here we store the section offsets in the order they were
1760 entered on the command line. */
1761 section_addrs
->other
[sec_num
].name
= sec
;
1762 section_addrs
->other
[sec_num
].addr
= addr
;
1763 printf_unfiltered ("\t%s_addr = %s\n",
1765 local_hex_string ((unsigned long)addr
));
1768 /* The object's sections are initialized when a
1769 call is made to build_objfile_section_table (objfile).
1770 This happens in reread_symbols.
1771 At this point, we don't know what file type this is,
1772 so we can't determine what section names are valid. */
1775 if (from_tty
&& (!query ("%s", "")))
1776 error ("Not confirmed.");
1778 symbol_file_add (filename
, from_tty
, section_addrs
, 0, flags
);
1780 /* Getting new symbols may change our opinion about what is
1782 reinit_frame_cache ();
1783 do_cleanups (my_cleanups
);
1787 add_shared_symbol_files_command (char *args
, int from_tty
)
1789 #ifdef ADD_SHARED_SYMBOL_FILES
1790 ADD_SHARED_SYMBOL_FILES (args
, from_tty
);
1792 error ("This command is not available in this configuration of GDB.");
1796 /* Re-read symbols if a symbol-file has changed. */
1798 reread_symbols (void)
1800 struct objfile
*objfile
;
1803 struct stat new_statbuf
;
1806 /* With the addition of shared libraries, this should be modified,
1807 the load time should be saved in the partial symbol tables, since
1808 different tables may come from different source files. FIXME.
1809 This routine should then walk down each partial symbol table
1810 and see if the symbol table that it originates from has been changed */
1812 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
1816 #ifdef DEPRECATED_IBM6000_TARGET
1817 /* If this object is from a shared library, then you should
1818 stat on the library name, not member name. */
1820 if (objfile
->obfd
->my_archive
)
1821 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
1824 res
= stat (objfile
->name
, &new_statbuf
);
1827 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1828 printf_unfiltered ("`%s' has disappeared; keeping its symbols.\n",
1832 new_modtime
= new_statbuf
.st_mtime
;
1833 if (new_modtime
!= objfile
->mtime
)
1835 struct cleanup
*old_cleanups
;
1836 struct section_offsets
*offsets
;
1838 char *obfd_filename
;
1840 printf_unfiltered ("`%s' has changed; re-reading symbols.\n",
1843 /* There are various functions like symbol_file_add,
1844 symfile_bfd_open, syms_from_objfile, etc., which might
1845 appear to do what we want. But they have various other
1846 effects which we *don't* want. So we just do stuff
1847 ourselves. We don't worry about mapped files (for one thing,
1848 any mapped file will be out of date). */
1850 /* If we get an error, blow away this objfile (not sure if
1851 that is the correct response for things like shared
1853 old_cleanups
= make_cleanup_free_objfile (objfile
);
1854 /* We need to do this whenever any symbols go away. */
1855 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
1857 /* Clean up any state BFD has sitting around. We don't need
1858 to close the descriptor but BFD lacks a way of closing the
1859 BFD without closing the descriptor. */
1860 obfd_filename
= bfd_get_filename (objfile
->obfd
);
1861 if (!bfd_close (objfile
->obfd
))
1862 error ("Can't close BFD for %s: %s", objfile
->name
,
1863 bfd_errmsg (bfd_get_error ()));
1864 objfile
->obfd
= bfd_openr (obfd_filename
, gnutarget
);
1865 if (objfile
->obfd
== NULL
)
1866 error ("Can't open %s to read symbols.", objfile
->name
);
1867 /* bfd_openr sets cacheable to true, which is what we want. */
1868 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
1869 error ("Can't read symbols from %s: %s.", objfile
->name
,
1870 bfd_errmsg (bfd_get_error ()));
1872 /* Save the offsets, we will nuke them with the rest of the
1874 num_offsets
= objfile
->num_sections
;
1875 offsets
= ((struct section_offsets
*)
1876 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
1877 memcpy (offsets
, objfile
->section_offsets
,
1878 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
1880 /* Nuke all the state that we will re-read. Much of the following
1881 code which sets things to NULL really is necessary to tell
1882 other parts of GDB that there is nothing currently there. */
1884 /* FIXME: Do we have to free a whole linked list, or is this
1886 if (objfile
->global_psymbols
.list
)
1887 xfree (objfile
->global_psymbols
.list
);
1888 memset (&objfile
->global_psymbols
, 0,
1889 sizeof (objfile
->global_psymbols
));
1890 if (objfile
->static_psymbols
.list
)
1891 xfree (objfile
->static_psymbols
.list
);
1892 memset (&objfile
->static_psymbols
, 0,
1893 sizeof (objfile
->static_psymbols
));
1895 /* Free the obstacks for non-reusable objfiles */
1896 bcache_xfree (objfile
->psymbol_cache
);
1897 objfile
->psymbol_cache
= bcache_xmalloc ();
1898 bcache_xfree (objfile
->macro_cache
);
1899 objfile
->macro_cache
= bcache_xmalloc ();
1900 if (objfile
->demangled_names_hash
!= NULL
)
1902 htab_delete (objfile
->demangled_names_hash
);
1903 objfile
->demangled_names_hash
= NULL
;
1905 obstack_free (&objfile
->objfile_obstack
, 0);
1906 objfile
->sections
= NULL
;
1907 objfile
->symtabs
= NULL
;
1908 objfile
->psymtabs
= NULL
;
1909 objfile
->free_psymtabs
= NULL
;
1910 objfile
->cp_namespace_symtab
= NULL
;
1911 objfile
->msymbols
= NULL
;
1912 objfile
->sym_private
= NULL
;
1913 objfile
->minimal_symbol_count
= 0;
1914 memset (&objfile
->msymbol_hash
, 0,
1915 sizeof (objfile
->msymbol_hash
));
1916 memset (&objfile
->msymbol_demangled_hash
, 0,
1917 sizeof (objfile
->msymbol_demangled_hash
));
1918 objfile
->fundamental_types
= NULL
;
1919 clear_objfile_data (objfile
);
1920 if (objfile
->sf
!= NULL
)
1922 (*objfile
->sf
->sym_finish
) (objfile
);
1925 /* We never make this a mapped file. */
1927 objfile
->psymbol_cache
= bcache_xmalloc ();
1928 objfile
->macro_cache
= bcache_xmalloc ();
1929 /* obstack_init also initializes the obstack so it is
1930 empty. We could use obstack_specify_allocation but
1931 gdb_obstack.h specifies the alloc/dealloc
1933 obstack_init (&objfile
->objfile_obstack
);
1934 if (build_objfile_section_table (objfile
))
1936 error ("Can't find the file sections in `%s': %s",
1937 objfile
->name
, bfd_errmsg (bfd_get_error ()));
1939 terminate_minimal_symbol_table (objfile
);
1941 /* We use the same section offsets as from last time. I'm not
1942 sure whether that is always correct for shared libraries. */
1943 objfile
->section_offsets
= (struct section_offsets
*)
1944 obstack_alloc (&objfile
->objfile_obstack
,
1945 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
1946 memcpy (objfile
->section_offsets
, offsets
,
1947 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
1948 objfile
->num_sections
= num_offsets
;
1950 /* What the hell is sym_new_init for, anyway? The concept of
1951 distinguishing between the main file and additional files
1952 in this way seems rather dubious. */
1953 if (objfile
== symfile_objfile
)
1955 (*objfile
->sf
->sym_new_init
) (objfile
);
1958 (*objfile
->sf
->sym_init
) (objfile
);
1959 clear_complaints (&symfile_complaints
, 1, 1);
1960 /* The "mainline" parameter is a hideous hack; I think leaving it
1961 zero is OK since dbxread.c also does what it needs to do if
1962 objfile->global_psymbols.size is 0. */
1963 (*objfile
->sf
->sym_read
) (objfile
, 0);
1964 if (!have_partial_symbols () && !have_full_symbols ())
1967 printf_unfiltered ("(no debugging symbols found)\n");
1970 objfile
->flags
|= OBJF_SYMS
;
1972 /* We're done reading the symbol file; finish off complaints. */
1973 clear_complaints (&symfile_complaints
, 0, 1);
1975 /* Getting new symbols may change our opinion about what is
1978 reinit_frame_cache ();
1980 /* Discard cleanups as symbol reading was successful. */
1981 discard_cleanups (old_cleanups
);
1983 /* If the mtime has changed between the time we set new_modtime
1984 and now, we *want* this to be out of date, so don't call stat
1986 objfile
->mtime
= new_modtime
;
1988 reread_separate_symbols (objfile
);
1994 clear_symtab_users ();
1998 /* Handle separate debug info for OBJFILE, which has just been
2000 - If we had separate debug info before, but now we don't, get rid
2001 of the separated objfile.
2002 - If we didn't have separated debug info before, but now we do,
2003 read in the new separated debug info file.
2004 - If the debug link points to a different file, toss the old one
2005 and read the new one.
2006 This function does *not* handle the case where objfile is still
2007 using the same separate debug info file, but that file's timestamp
2008 has changed. That case should be handled by the loop in
2009 reread_symbols already. */
2011 reread_separate_symbols (struct objfile
*objfile
)
2014 unsigned long crc32
;
2016 /* Does the updated objfile's debug info live in a
2018 debug_file
= find_separate_debug_file (objfile
);
2020 if (objfile
->separate_debug_objfile
)
2022 /* There are two cases where we need to get rid of
2023 the old separated debug info objfile:
2024 - if the new primary objfile doesn't have
2025 separated debug info, or
2026 - if the new primary objfile has separate debug
2027 info, but it's under a different filename.
2029 If the old and new objfiles both have separate
2030 debug info, under the same filename, then we're
2031 okay --- if the separated file's contents have
2032 changed, we will have caught that when we
2033 visited it in this function's outermost
2036 || strcmp (debug_file
, objfile
->separate_debug_objfile
->name
) != 0)
2037 free_objfile (objfile
->separate_debug_objfile
);
2040 /* If the new objfile has separate debug info, and we
2041 haven't loaded it already, do so now. */
2043 && ! objfile
->separate_debug_objfile
)
2045 /* Use the same section offset table as objfile itself.
2046 Preserve the flags from objfile that make sense. */
2047 objfile
->separate_debug_objfile
2048 = (symbol_file_add_with_addrs_or_offsets
2049 (symfile_bfd_open (debug_file
),
2050 info_verbose
, /* from_tty: Don't override the default. */
2051 0, /* No addr table. */
2052 objfile
->section_offsets
, objfile
->num_sections
,
2053 0, /* Not mainline. See comments about this above. */
2054 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
2055 | OBJF_USERLOADED
)));
2056 objfile
->separate_debug_objfile
->separate_debug_objfile_backlink
2072 static filename_language
*filename_language_table
;
2073 static int fl_table_size
, fl_table_next
;
2076 add_filename_language (char *ext
, enum language lang
)
2078 if (fl_table_next
>= fl_table_size
)
2080 fl_table_size
+= 10;
2081 filename_language_table
=
2082 xrealloc (filename_language_table
,
2083 fl_table_size
* sizeof (*filename_language_table
));
2086 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2087 filename_language_table
[fl_table_next
].lang
= lang
;
2091 static char *ext_args
;
2094 set_ext_lang_command (char *args
, int from_tty
)
2097 char *cp
= ext_args
;
2100 /* First arg is filename extension, starting with '.' */
2102 error ("'%s': Filename extension must begin with '.'", ext_args
);
2104 /* Find end of first arg. */
2105 while (*cp
&& !isspace (*cp
))
2109 error ("'%s': two arguments required -- filename extension and language",
2112 /* Null-terminate first arg */
2115 /* Find beginning of second arg, which should be a source language. */
2116 while (*cp
&& isspace (*cp
))
2120 error ("'%s': two arguments required -- filename extension and language",
2123 /* Lookup the language from among those we know. */
2124 lang
= language_enum (cp
);
2126 /* Now lookup the filename extension: do we already know it? */
2127 for (i
= 0; i
< fl_table_next
; i
++)
2128 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2131 if (i
>= fl_table_next
)
2133 /* new file extension */
2134 add_filename_language (ext_args
, lang
);
2138 /* redefining a previously known filename extension */
2141 /* query ("Really make files of type %s '%s'?", */
2142 /* ext_args, language_str (lang)); */
2144 xfree (filename_language_table
[i
].ext
);
2145 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2146 filename_language_table
[i
].lang
= lang
;
2151 info_ext_lang_command (char *args
, int from_tty
)
2155 printf_filtered ("Filename extensions and the languages they represent:");
2156 printf_filtered ("\n\n");
2157 for (i
= 0; i
< fl_table_next
; i
++)
2158 printf_filtered ("\t%s\t- %s\n",
2159 filename_language_table
[i
].ext
,
2160 language_str (filename_language_table
[i
].lang
));
2164 init_filename_language_table (void)
2166 if (fl_table_size
== 0) /* protect against repetition */
2170 filename_language_table
=
2171 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
2172 add_filename_language (".c", language_c
);
2173 add_filename_language (".C", language_cplus
);
2174 add_filename_language (".cc", language_cplus
);
2175 add_filename_language (".cp", language_cplus
);
2176 add_filename_language (".cpp", language_cplus
);
2177 add_filename_language (".cxx", language_cplus
);
2178 add_filename_language (".c++", language_cplus
);
2179 add_filename_language (".java", language_java
);
2180 add_filename_language (".class", language_java
);
2181 add_filename_language (".m", language_objc
);
2182 add_filename_language (".f", language_fortran
);
2183 add_filename_language (".F", language_fortran
);
2184 add_filename_language (".s", language_asm
);
2185 add_filename_language (".S", language_asm
);
2186 add_filename_language (".pas", language_pascal
);
2187 add_filename_language (".p", language_pascal
);
2188 add_filename_language (".pp", language_pascal
);
2193 deduce_language_from_filename (char *filename
)
2198 if (filename
!= NULL
)
2199 if ((cp
= strrchr (filename
, '.')) != NULL
)
2200 for (i
= 0; i
< fl_table_next
; i
++)
2201 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2202 return filename_language_table
[i
].lang
;
2204 return language_unknown
;
2209 Allocate and partly initialize a new symbol table. Return a pointer
2210 to it. error() if no space.
2212 Caller must set these fields:
2218 possibly free_named_symtabs (symtab->filename);
2222 allocate_symtab (char *filename
, struct objfile
*objfile
)
2224 struct symtab
*symtab
;
2226 symtab
= (struct symtab
*)
2227 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symtab
));
2228 memset (symtab
, 0, sizeof (*symtab
));
2229 symtab
->filename
= obsavestring (filename
, strlen (filename
),
2230 &objfile
->objfile_obstack
);
2231 symtab
->fullname
= NULL
;
2232 symtab
->language
= deduce_language_from_filename (filename
);
2233 symtab
->debugformat
= obsavestring ("unknown", 7,
2234 &objfile
->objfile_obstack
);
2236 /* Hook it to the objfile it comes from */
2238 symtab
->objfile
= objfile
;
2239 symtab
->next
= objfile
->symtabs
;
2240 objfile
->symtabs
= symtab
;
2242 /* FIXME: This should go away. It is only defined for the Z8000,
2243 and the Z8000 definition of this macro doesn't have anything to
2244 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
2245 here for convenience. */
2246 #ifdef INIT_EXTRA_SYMTAB_INFO
2247 INIT_EXTRA_SYMTAB_INFO (symtab
);
2253 struct partial_symtab
*
2254 allocate_psymtab (char *filename
, struct objfile
*objfile
)
2256 struct partial_symtab
*psymtab
;
2258 if (objfile
->free_psymtabs
)
2260 psymtab
= objfile
->free_psymtabs
;
2261 objfile
->free_psymtabs
= psymtab
->next
;
2264 psymtab
= (struct partial_symtab
*)
2265 obstack_alloc (&objfile
->objfile_obstack
,
2266 sizeof (struct partial_symtab
));
2268 memset (psymtab
, 0, sizeof (struct partial_symtab
));
2269 psymtab
->filename
= obsavestring (filename
, strlen (filename
),
2270 &objfile
->objfile_obstack
);
2271 psymtab
->symtab
= NULL
;
2273 /* Prepend it to the psymtab list for the objfile it belongs to.
2274 Psymtabs are searched in most recent inserted -> least recent
2277 psymtab
->objfile
= objfile
;
2278 psymtab
->next
= objfile
->psymtabs
;
2279 objfile
->psymtabs
= psymtab
;
2282 struct partial_symtab
**prev_pst
;
2283 psymtab
->objfile
= objfile
;
2284 psymtab
->next
= NULL
;
2285 prev_pst
= &(objfile
->psymtabs
);
2286 while ((*prev_pst
) != NULL
)
2287 prev_pst
= &((*prev_pst
)->next
);
2288 (*prev_pst
) = psymtab
;
2296 discard_psymtab (struct partial_symtab
*pst
)
2298 struct partial_symtab
**prev_pst
;
2301 Empty psymtabs happen as a result of header files which don't
2302 have any symbols in them. There can be a lot of them. But this
2303 check is wrong, in that a psymtab with N_SLINE entries but
2304 nothing else is not empty, but we don't realize that. Fixing
2305 that without slowing things down might be tricky. */
2307 /* First, snip it out of the psymtab chain */
2309 prev_pst
= &(pst
->objfile
->psymtabs
);
2310 while ((*prev_pst
) != pst
)
2311 prev_pst
= &((*prev_pst
)->next
);
2312 (*prev_pst
) = pst
->next
;
2314 /* Next, put it on a free list for recycling */
2316 pst
->next
= pst
->objfile
->free_psymtabs
;
2317 pst
->objfile
->free_psymtabs
= pst
;
2321 /* Reset all data structures in gdb which may contain references to symbol
2325 clear_symtab_users (void)
2327 /* Someday, we should do better than this, by only blowing away
2328 the things that really need to be blown. */
2329 clear_value_history ();
2331 clear_internalvars ();
2332 breakpoint_re_set ();
2333 set_default_breakpoint (0, 0, 0, 0);
2334 clear_current_source_symtab_and_line ();
2335 clear_pc_function_cache ();
2336 if (deprecated_target_new_objfile_hook
)
2337 deprecated_target_new_objfile_hook (NULL
);
2341 clear_symtab_users_cleanup (void *ignore
)
2343 clear_symtab_users ();
2346 /* clear_symtab_users_once:
2348 This function is run after symbol reading, or from a cleanup.
2349 If an old symbol table was obsoleted, the old symbol table
2350 has been blown away, but the other GDB data structures that may
2351 reference it have not yet been cleared or re-directed. (The old
2352 symtab was zapped, and the cleanup queued, in free_named_symtab()
2355 This function can be queued N times as a cleanup, or called
2356 directly; it will do all the work the first time, and then will be a
2357 no-op until the next time it is queued. This works by bumping a
2358 counter at queueing time. Much later when the cleanup is run, or at
2359 the end of symbol processing (in case the cleanup is discarded), if
2360 the queued count is greater than the "done-count", we do the work
2361 and set the done-count to the queued count. If the queued count is
2362 less than or equal to the done-count, we just ignore the call. This
2363 is needed because reading a single .o file will often replace many
2364 symtabs (one per .h file, for example), and we don't want to reset
2365 the breakpoints N times in the user's face.
2367 The reason we both queue a cleanup, and call it directly after symbol
2368 reading, is because the cleanup protects us in case of errors, but is
2369 discarded if symbol reading is successful. */
2372 /* FIXME: As free_named_symtabs is currently a big noop this function
2373 is no longer needed. */
2374 static void clear_symtab_users_once (void);
2376 static int clear_symtab_users_queued
;
2377 static int clear_symtab_users_done
;
2380 clear_symtab_users_once (void)
2382 /* Enforce once-per-`do_cleanups'-semantics */
2383 if (clear_symtab_users_queued
<= clear_symtab_users_done
)
2385 clear_symtab_users_done
= clear_symtab_users_queued
;
2387 clear_symtab_users ();
2391 /* Delete the specified psymtab, and any others that reference it. */
2394 cashier_psymtab (struct partial_symtab
*pst
)
2396 struct partial_symtab
*ps
, *pprev
= NULL
;
2399 /* Find its previous psymtab in the chain */
2400 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2409 /* Unhook it from the chain. */
2410 if (ps
== pst
->objfile
->psymtabs
)
2411 pst
->objfile
->psymtabs
= ps
->next
;
2413 pprev
->next
= ps
->next
;
2415 /* FIXME, we can't conveniently deallocate the entries in the
2416 partial_symbol lists (global_psymbols/static_psymbols) that
2417 this psymtab points to. These just take up space until all
2418 the psymtabs are reclaimed. Ditto the dependencies list and
2419 filename, which are all in the objfile_obstack. */
2421 /* We need to cashier any psymtab that has this one as a dependency... */
2423 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2425 for (i
= 0; i
< ps
->number_of_dependencies
; i
++)
2427 if (ps
->dependencies
[i
] == pst
)
2429 cashier_psymtab (ps
);
2430 goto again
; /* Must restart, chain has been munged. */
2437 /* If a symtab or psymtab for filename NAME is found, free it along
2438 with any dependent breakpoints, displays, etc.
2439 Used when loading new versions of object modules with the "add-file"
2440 command. This is only called on the top-level symtab or psymtab's name;
2441 it is not called for subsidiary files such as .h files.
2443 Return value is 1 if we blew away the environment, 0 if not.
2444 FIXME. The return value appears to never be used.
2446 FIXME. I think this is not the best way to do this. We should
2447 work on being gentler to the environment while still cleaning up
2448 all stray pointers into the freed symtab. */
2451 free_named_symtabs (char *name
)
2454 /* FIXME: With the new method of each objfile having it's own
2455 psymtab list, this function needs serious rethinking. In particular,
2456 why was it ever necessary to toss psymtabs with specific compilation
2457 unit filenames, as opposed to all psymtabs from a particular symbol
2459 Well, the answer is that some systems permit reloading of particular
2460 compilation units. We want to blow away any old info about these
2461 compilation units, regardless of which objfiles they arrived in. --gnu. */
2464 struct symtab
*prev
;
2465 struct partial_symtab
*ps
;
2466 struct blockvector
*bv
;
2469 /* We only wack things if the symbol-reload switch is set. */
2470 if (!symbol_reloading
)
2473 /* Some symbol formats have trouble providing file names... */
2474 if (name
== 0 || *name
== '\0')
2477 /* Look for a psymtab with the specified name. */
2480 for (ps
= partial_symtab_list
; ps
; ps
= ps
->next
)
2482 if (strcmp (name
, ps
->filename
) == 0)
2484 cashier_psymtab (ps
); /* Blow it away...and its little dog, too. */
2485 goto again2
; /* Must restart, chain has been munged */
2489 /* Look for a symtab with the specified name. */
2491 for (s
= symtab_list
; s
; s
= s
->next
)
2493 if (strcmp (name
, s
->filename
) == 0)
2500 if (s
== symtab_list
)
2501 symtab_list
= s
->next
;
2503 prev
->next
= s
->next
;
2505 /* For now, queue a delete for all breakpoints, displays, etc., whether
2506 or not they depend on the symtab being freed. This should be
2507 changed so that only those data structures affected are deleted. */
2509 /* But don't delete anything if the symtab is empty.
2510 This test is necessary due to a bug in "dbxread.c" that
2511 causes empty symtabs to be created for N_SO symbols that
2512 contain the pathname of the object file. (This problem
2513 has been fixed in GDB 3.9x). */
2515 bv
= BLOCKVECTOR (s
);
2516 if (BLOCKVECTOR_NBLOCKS (bv
) > 2
2517 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
))
2518 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)))
2520 complaint (&symfile_complaints
, "Replacing old symbols for `%s'",
2522 clear_symtab_users_queued
++;
2523 make_cleanup (clear_symtab_users_once
, 0);
2528 complaint (&symfile_complaints
, "Empty symbol table found for `%s'",
2536 /* It is still possible that some breakpoints will be affected
2537 even though no symtab was found, since the file might have
2538 been compiled without debugging, and hence not be associated
2539 with a symtab. In order to handle this correctly, we would need
2540 to keep a list of text address ranges for undebuggable files.
2541 For now, we do nothing, since this is a fairly obscure case. */
2545 /* FIXME, what about the minimal symbol table? */
2552 /* Allocate and partially fill a partial symtab. It will be
2553 completely filled at the end of the symbol list.
2555 FILENAME is the name of the symbol-file we are reading from. */
2557 struct partial_symtab
*
2558 start_psymtab_common (struct objfile
*objfile
,
2559 struct section_offsets
*section_offsets
, char *filename
,
2560 CORE_ADDR textlow
, struct partial_symbol
**global_syms
,
2561 struct partial_symbol
**static_syms
)
2563 struct partial_symtab
*psymtab
;
2565 psymtab
= allocate_psymtab (filename
, objfile
);
2566 psymtab
->section_offsets
= section_offsets
;
2567 psymtab
->textlow
= textlow
;
2568 psymtab
->texthigh
= psymtab
->textlow
; /* default */
2569 psymtab
->globals_offset
= global_syms
- objfile
->global_psymbols
.list
;
2570 psymtab
->statics_offset
= static_syms
- objfile
->static_psymbols
.list
;
2574 /* Add a symbol with a long value to a psymtab.
2575 Since one arg is a struct, we pass in a ptr and deref it (sigh).
2576 Return the partial symbol that has been added. */
2578 /* NOTE: carlton/2003-09-11: The reason why we return the partial
2579 symbol is so that callers can get access to the symbol's demangled
2580 name, which they don't have any cheap way to determine otherwise.
2581 (Currenly, dwarf2read.c is the only file who uses that information,
2582 though it's possible that other readers might in the future.)
2583 Elena wasn't thrilled about that, and I don't blame her, but we
2584 couldn't come up with a better way to get that information. If
2585 it's needed in other situations, we could consider breaking up
2586 SYMBOL_SET_NAMES to provide access to the demangled name lookup
2589 const struct partial_symbol
*
2590 add_psymbol_to_list (char *name
, int namelength
, domain_enum domain
,
2591 enum address_class
class,
2592 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2593 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2594 enum language language
, struct objfile
*objfile
)
2596 struct partial_symbol
*psym
;
2597 char *buf
= alloca (namelength
+ 1);
2598 /* psymbol is static so that there will be no uninitialized gaps in the
2599 structure which might contain random data, causing cache misses in
2601 static struct partial_symbol psymbol
;
2603 /* Create local copy of the partial symbol */
2604 memcpy (buf
, name
, namelength
);
2605 buf
[namelength
] = '\0';
2606 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2609 SYMBOL_VALUE (&psymbol
) = val
;
2613 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2615 SYMBOL_SECTION (&psymbol
) = 0;
2616 SYMBOL_LANGUAGE (&psymbol
) = language
;
2617 PSYMBOL_DOMAIN (&psymbol
) = domain
;
2618 PSYMBOL_CLASS (&psymbol
) = class;
2620 SYMBOL_SET_NAMES (&psymbol
, buf
, namelength
, objfile
);
2622 /* Stash the partial symbol away in the cache */
2623 psym
= deprecated_bcache (&psymbol
, sizeof (struct partial_symbol
),
2624 objfile
->psymbol_cache
);
2626 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2627 if (list
->next
>= list
->list
+ list
->size
)
2629 extend_psymbol_list (list
, objfile
);
2631 *list
->next
++ = psym
;
2632 OBJSTAT (objfile
, n_psyms
++);
2637 /* Add a symbol with a long value to a psymtab. This differs from
2638 * add_psymbol_to_list above in taking both a mangled and a demangled
2642 add_psymbol_with_dem_name_to_list (char *name
, int namelength
, char *dem_name
,
2643 int dem_namelength
, domain_enum domain
,
2644 enum address_class
class,
2645 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2646 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2647 enum language language
,
2648 struct objfile
*objfile
)
2650 struct partial_symbol
*psym
;
2651 char *buf
= alloca (namelength
+ 1);
2652 /* psymbol is static so that there will be no uninitialized gaps in the
2653 structure which might contain random data, causing cache misses in
2655 static struct partial_symbol psymbol
;
2657 /* Create local copy of the partial symbol */
2659 memcpy (buf
, name
, namelength
);
2660 buf
[namelength
] = '\0';
2661 DEPRECATED_SYMBOL_NAME (&psymbol
) = deprecated_bcache (buf
, namelength
+ 1,
2662 objfile
->psymbol_cache
);
2664 buf
= alloca (dem_namelength
+ 1);
2665 memcpy (buf
, dem_name
, dem_namelength
);
2666 buf
[dem_namelength
] = '\0';
2671 case language_cplus
:
2672 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol
) =
2673 deprecated_bcache (buf
, dem_namelength
+ 1, objfile
->psymbol_cache
);
2675 /* FIXME What should be done for the default case? Ignoring for now. */
2678 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2681 SYMBOL_VALUE (&psymbol
) = val
;
2685 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2687 SYMBOL_SECTION (&psymbol
) = 0;
2688 SYMBOL_LANGUAGE (&psymbol
) = language
;
2689 PSYMBOL_DOMAIN (&psymbol
) = domain
;
2690 PSYMBOL_CLASS (&psymbol
) = class;
2691 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2693 /* Stash the partial symbol away in the cache */
2694 psym
= deprecated_bcache (&psymbol
, sizeof (struct partial_symbol
),
2695 objfile
->psymbol_cache
);
2697 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2698 if (list
->next
>= list
->list
+ list
->size
)
2700 extend_psymbol_list (list
, objfile
);
2702 *list
->next
++ = psym
;
2703 OBJSTAT (objfile
, n_psyms
++);
2706 /* Initialize storage for partial symbols. */
2709 init_psymbol_list (struct objfile
*objfile
, int total_symbols
)
2711 /* Free any previously allocated psymbol lists. */
2713 if (objfile
->global_psymbols
.list
)
2715 xfree (objfile
->global_psymbols
.list
);
2717 if (objfile
->static_psymbols
.list
)
2719 xfree (objfile
->static_psymbols
.list
);
2722 /* Current best guess is that approximately a twentieth
2723 of the total symbols (in a debugging file) are global or static
2726 objfile
->global_psymbols
.size
= total_symbols
/ 10;
2727 objfile
->static_psymbols
.size
= total_symbols
/ 10;
2729 if (objfile
->global_psymbols
.size
> 0)
2731 objfile
->global_psymbols
.next
=
2732 objfile
->global_psymbols
.list
= (struct partial_symbol
**)
2733 xmalloc ((objfile
->global_psymbols
.size
2734 * sizeof (struct partial_symbol
*)));
2736 if (objfile
->static_psymbols
.size
> 0)
2738 objfile
->static_psymbols
.next
=
2739 objfile
->static_psymbols
.list
= (struct partial_symbol
**)
2740 xmalloc ((objfile
->static_psymbols
.size
2741 * sizeof (struct partial_symbol
*)));
2746 The following code implements an abstraction for debugging overlay sections.
2748 The target model is as follows:
2749 1) The gnu linker will permit multiple sections to be mapped into the
2750 same VMA, each with its own unique LMA (or load address).
2751 2) It is assumed that some runtime mechanism exists for mapping the
2752 sections, one by one, from the load address into the VMA address.
2753 3) This code provides a mechanism for gdb to keep track of which
2754 sections should be considered to be mapped from the VMA to the LMA.
2755 This information is used for symbol lookup, and memory read/write.
2756 For instance, if a section has been mapped then its contents
2757 should be read from the VMA, otherwise from the LMA.
2759 Two levels of debugger support for overlays are available. One is
2760 "manual", in which the debugger relies on the user to tell it which
2761 overlays are currently mapped. This level of support is
2762 implemented entirely in the core debugger, and the information about
2763 whether a section is mapped is kept in the objfile->obj_section table.
2765 The second level of support is "automatic", and is only available if
2766 the target-specific code provides functionality to read the target's
2767 overlay mapping table, and translate its contents for the debugger
2768 (by updating the mapped state information in the obj_section tables).
2770 The interface is as follows:
2772 overlay map <name> -- tell gdb to consider this section mapped
2773 overlay unmap <name> -- tell gdb to consider this section unmapped
2774 overlay list -- list the sections that GDB thinks are mapped
2775 overlay read-target -- get the target's state of what's mapped
2776 overlay off/manual/auto -- set overlay debugging state
2777 Functional interface:
2778 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2779 section, return that section.
2780 find_pc_overlay(pc): find any overlay section that contains
2781 the pc, either in its VMA or its LMA
2782 overlay_is_mapped(sect): true if overlay is marked as mapped
2783 section_is_overlay(sect): true if section's VMA != LMA
2784 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2785 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2786 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2787 overlay_mapped_address(...): map an address from section's LMA to VMA
2788 overlay_unmapped_address(...): map an address from section's VMA to LMA
2789 symbol_overlayed_address(...): Return a "current" address for symbol:
2790 either in VMA or LMA depending on whether
2791 the symbol's section is currently mapped
2794 /* Overlay debugging state: */
2796 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2797 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
2799 /* Target vector for refreshing overlay mapped state */
2800 static void simple_overlay_update (struct obj_section
*);
2801 void (*target_overlay_update
) (struct obj_section
*) = simple_overlay_update
;
2803 /* Function: section_is_overlay (SECTION)
2804 Returns true if SECTION has VMA not equal to LMA, ie.
2805 SECTION is loaded at an address different from where it will "run". */
2808 section_is_overlay (asection
*section
)
2810 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2812 if (overlay_debugging
)
2813 if (section
&& section
->lma
!= 0 &&
2814 section
->vma
!= section
->lma
)
2820 /* Function: overlay_invalidate_all (void)
2821 Invalidate the mapped state of all overlay sections (mark it as stale). */
2824 overlay_invalidate_all (void)
2826 struct objfile
*objfile
;
2827 struct obj_section
*sect
;
2829 ALL_OBJSECTIONS (objfile
, sect
)
2830 if (section_is_overlay (sect
->the_bfd_section
))
2831 sect
->ovly_mapped
= -1;
2834 /* Function: overlay_is_mapped (SECTION)
2835 Returns true if section is an overlay, and is currently mapped.
2836 Private: public access is thru function section_is_mapped.
2838 Access to the ovly_mapped flag is restricted to this function, so
2839 that we can do automatic update. If the global flag
2840 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2841 overlay_invalidate_all. If the mapped state of the particular
2842 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2845 overlay_is_mapped (struct obj_section
*osect
)
2847 if (osect
== 0 || !section_is_overlay (osect
->the_bfd_section
))
2850 switch (overlay_debugging
)
2854 return 0; /* overlay debugging off */
2855 case ovly_auto
: /* overlay debugging automatic */
2856 /* Unles there is a target_overlay_update function,
2857 there's really nothing useful to do here (can't really go auto) */
2858 if (target_overlay_update
)
2860 if (overlay_cache_invalid
)
2862 overlay_invalidate_all ();
2863 overlay_cache_invalid
= 0;
2865 if (osect
->ovly_mapped
== -1)
2866 (*target_overlay_update
) (osect
);
2868 /* fall thru to manual case */
2869 case ovly_on
: /* overlay debugging manual */
2870 return osect
->ovly_mapped
== 1;
2874 /* Function: section_is_mapped
2875 Returns true if section is an overlay, and is currently mapped. */
2878 section_is_mapped (asection
*section
)
2880 struct objfile
*objfile
;
2881 struct obj_section
*osect
;
2883 if (overlay_debugging
)
2884 if (section
&& section_is_overlay (section
))
2885 ALL_OBJSECTIONS (objfile
, osect
)
2886 if (osect
->the_bfd_section
== section
)
2887 return overlay_is_mapped (osect
);
2892 /* Function: pc_in_unmapped_range
2893 If PC falls into the lma range of SECTION, return true, else false. */
2896 pc_in_unmapped_range (CORE_ADDR pc
, asection
*section
)
2898 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2902 if (overlay_debugging
)
2903 if (section
&& section_is_overlay (section
))
2905 size
= bfd_get_section_size (section
);
2906 if (section
->lma
<= pc
&& pc
< section
->lma
+ size
)
2912 /* Function: pc_in_mapped_range
2913 If PC falls into the vma range of SECTION, return true, else false. */
2916 pc_in_mapped_range (CORE_ADDR pc
, asection
*section
)
2918 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2922 if (overlay_debugging
)
2923 if (section
&& section_is_overlay (section
))
2925 size
= bfd_get_section_size (section
);
2926 if (section
->vma
<= pc
&& pc
< section
->vma
+ size
)
2933 /* Return true if the mapped ranges of sections A and B overlap, false
2936 sections_overlap (asection
*a
, asection
*b
)
2938 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2940 CORE_ADDR a_start
= a
->vma
;
2941 CORE_ADDR a_end
= a
->vma
+ bfd_get_section_size (a
);
2942 CORE_ADDR b_start
= b
->vma
;
2943 CORE_ADDR b_end
= b
->vma
+ bfd_get_section_size (b
);
2945 return (a_start
< b_end
&& b_start
< a_end
);
2948 /* Function: overlay_unmapped_address (PC, SECTION)
2949 Returns the address corresponding to PC in the unmapped (load) range.
2950 May be the same as PC. */
2953 overlay_unmapped_address (CORE_ADDR pc
, asection
*section
)
2955 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2957 if (overlay_debugging
)
2958 if (section
&& section_is_overlay (section
) &&
2959 pc_in_mapped_range (pc
, section
))
2960 return pc
+ section
->lma
- section
->vma
;
2965 /* Function: overlay_mapped_address (PC, SECTION)
2966 Returns the address corresponding to PC in the mapped (runtime) range.
2967 May be the same as PC. */
2970 overlay_mapped_address (CORE_ADDR pc
, asection
*section
)
2972 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2974 if (overlay_debugging
)
2975 if (section
&& section_is_overlay (section
) &&
2976 pc_in_unmapped_range (pc
, section
))
2977 return pc
+ section
->vma
- section
->lma
;
2983 /* Function: symbol_overlayed_address
2984 Return one of two addresses (relative to the VMA or to the LMA),
2985 depending on whether the section is mapped or not. */
2988 symbol_overlayed_address (CORE_ADDR address
, asection
*section
)
2990 if (overlay_debugging
)
2992 /* If the symbol has no section, just return its regular address. */
2995 /* If the symbol's section is not an overlay, just return its address */
2996 if (!section_is_overlay (section
))
2998 /* If the symbol's section is mapped, just return its address */
2999 if (section_is_mapped (section
))
3002 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3003 * then return its LOADED address rather than its vma address!!
3005 return overlay_unmapped_address (address
, section
);
3010 /* Function: find_pc_overlay (PC)
3011 Return the best-match overlay section for PC:
3012 If PC matches a mapped overlay section's VMA, return that section.
3013 Else if PC matches an unmapped section's VMA, return that section.
3014 Else if PC matches an unmapped section's LMA, return that section. */
3017 find_pc_overlay (CORE_ADDR pc
)
3019 struct objfile
*objfile
;
3020 struct obj_section
*osect
, *best_match
= NULL
;
3022 if (overlay_debugging
)
3023 ALL_OBJSECTIONS (objfile
, osect
)
3024 if (section_is_overlay (osect
->the_bfd_section
))
3026 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
))
3028 if (overlay_is_mapped (osect
))
3029 return osect
->the_bfd_section
;
3033 else if (pc_in_unmapped_range (pc
, osect
->the_bfd_section
))
3036 return best_match
? best_match
->the_bfd_section
: NULL
;
3039 /* Function: find_pc_mapped_section (PC)
3040 If PC falls into the VMA address range of an overlay section that is
3041 currently marked as MAPPED, return that section. Else return NULL. */
3044 find_pc_mapped_section (CORE_ADDR pc
)
3046 struct objfile
*objfile
;
3047 struct obj_section
*osect
;
3049 if (overlay_debugging
)
3050 ALL_OBJSECTIONS (objfile
, osect
)
3051 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
) &&
3052 overlay_is_mapped (osect
))
3053 return osect
->the_bfd_section
;
3058 /* Function: list_overlays_command
3059 Print a list of mapped sections and their PC ranges */
3062 list_overlays_command (char *args
, int from_tty
)
3065 struct objfile
*objfile
;
3066 struct obj_section
*osect
;
3068 if (overlay_debugging
)
3069 ALL_OBJSECTIONS (objfile
, osect
)
3070 if (overlay_is_mapped (osect
))
3076 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3077 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3078 size
= bfd_get_section_size (osect
->the_bfd_section
);
3079 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3081 printf_filtered ("Section %s, loaded at ", name
);
3082 print_address_numeric (lma
, 1, gdb_stdout
);
3083 puts_filtered (" - ");
3084 print_address_numeric (lma
+ size
, 1, gdb_stdout
);
3085 printf_filtered (", mapped at ");
3086 print_address_numeric (vma
, 1, gdb_stdout
);
3087 puts_filtered (" - ");
3088 print_address_numeric (vma
+ size
, 1, gdb_stdout
);
3089 puts_filtered ("\n");
3094 printf_filtered ("No sections are mapped.\n");
3097 /* Function: map_overlay_command
3098 Mark the named section as mapped (ie. residing at its VMA address). */
3101 map_overlay_command (char *args
, int from_tty
)
3103 struct objfile
*objfile
, *objfile2
;
3104 struct obj_section
*sec
, *sec2
;
3107 if (!overlay_debugging
)
3109 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3110 the 'overlay manual' command.");
3112 if (args
== 0 || *args
== 0)
3113 error ("Argument required: name of an overlay section");
3115 /* First, find a section matching the user supplied argument */
3116 ALL_OBJSECTIONS (objfile
, sec
)
3117 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3119 /* Now, check to see if the section is an overlay. */
3120 bfdsec
= sec
->the_bfd_section
;
3121 if (!section_is_overlay (bfdsec
))
3122 continue; /* not an overlay section */
3124 /* Mark the overlay as "mapped" */
3125 sec
->ovly_mapped
= 1;
3127 /* Next, make a pass and unmap any sections that are
3128 overlapped by this new section: */
3129 ALL_OBJSECTIONS (objfile2
, sec2
)
3130 if (sec2
->ovly_mapped
3132 && sec
->the_bfd_section
!= sec2
->the_bfd_section
3133 && sections_overlap (sec
->the_bfd_section
,
3134 sec2
->the_bfd_section
))
3137 printf_unfiltered ("Note: section %s unmapped by overlap\n",
3138 bfd_section_name (objfile
->obfd
,
3139 sec2
->the_bfd_section
));
3140 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
3144 error ("No overlay section called %s", args
);
3147 /* Function: unmap_overlay_command
3148 Mark the overlay section as unmapped
3149 (ie. resident in its LMA address range, rather than the VMA range). */
3152 unmap_overlay_command (char *args
, int from_tty
)
3154 struct objfile
*objfile
;
3155 struct obj_section
*sec
;
3157 if (!overlay_debugging
)
3159 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3160 the 'overlay manual' command.");
3162 if (args
== 0 || *args
== 0)
3163 error ("Argument required: name of an overlay section");
3165 /* First, find a section matching the user supplied argument */
3166 ALL_OBJSECTIONS (objfile
, sec
)
3167 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3169 if (!sec
->ovly_mapped
)
3170 error ("Section %s is not mapped", args
);
3171 sec
->ovly_mapped
= 0;
3174 error ("No overlay section called %s", args
);
3177 /* Function: overlay_auto_command
3178 A utility command to turn on overlay debugging.
3179 Possibly this should be done via a set/show command. */
3182 overlay_auto_command (char *args
, int from_tty
)
3184 overlay_debugging
= ovly_auto
;
3185 enable_overlay_breakpoints ();
3187 printf_unfiltered ("Automatic overlay debugging enabled.");
3190 /* Function: overlay_manual_command
3191 A utility command to turn on overlay debugging.
3192 Possibly this should be done via a set/show command. */
3195 overlay_manual_command (char *args
, int from_tty
)
3197 overlay_debugging
= ovly_on
;
3198 disable_overlay_breakpoints ();
3200 printf_unfiltered ("Overlay debugging enabled.");
3203 /* Function: overlay_off_command
3204 A utility command to turn on overlay debugging.
3205 Possibly this should be done via a set/show command. */
3208 overlay_off_command (char *args
, int from_tty
)
3210 overlay_debugging
= ovly_off
;
3211 disable_overlay_breakpoints ();
3213 printf_unfiltered ("Overlay debugging disabled.");
3217 overlay_load_command (char *args
, int from_tty
)
3219 if (target_overlay_update
)
3220 (*target_overlay_update
) (NULL
);
3222 error ("This target does not know how to read its overlay state.");
3225 /* Function: overlay_command
3226 A place-holder for a mis-typed command */
3228 /* Command list chain containing all defined "overlay" subcommands. */
3229 struct cmd_list_element
*overlaylist
;
3232 overlay_command (char *args
, int from_tty
)
3235 ("\"overlay\" must be followed by the name of an overlay command.\n");
3236 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3240 /* Target Overlays for the "Simplest" overlay manager:
3242 This is GDB's default target overlay layer. It works with the
3243 minimal overlay manager supplied as an example by Cygnus. The
3244 entry point is via a function pointer "target_overlay_update",
3245 so targets that use a different runtime overlay manager can
3246 substitute their own overlay_update function and take over the
3249 The overlay_update function pokes around in the target's data structures
3250 to see what overlays are mapped, and updates GDB's overlay mapping with
3253 In this simple implementation, the target data structures are as follows:
3254 unsigned _novlys; /# number of overlay sections #/
3255 unsigned _ovly_table[_novlys][4] = {
3256 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3257 {..., ..., ..., ...},
3259 unsigned _novly_regions; /# number of overlay regions #/
3260 unsigned _ovly_region_table[_novly_regions][3] = {
3261 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3264 These functions will attempt to update GDB's mappedness state in the
3265 symbol section table, based on the target's mappedness state.
3267 To do this, we keep a cached copy of the target's _ovly_table, and
3268 attempt to detect when the cached copy is invalidated. The main
3269 entry point is "simple_overlay_update(SECT), which looks up SECT in
3270 the cached table and re-reads only the entry for that section from
3271 the target (whenever possible).
3274 /* Cached, dynamically allocated copies of the target data structures: */
3275 static unsigned (*cache_ovly_table
)[4] = 0;
3277 static unsigned (*cache_ovly_region_table
)[3] = 0;
3279 static unsigned cache_novlys
= 0;
3281 static unsigned cache_novly_regions
= 0;
3283 static CORE_ADDR cache_ovly_table_base
= 0;
3285 static CORE_ADDR cache_ovly_region_table_base
= 0;
3289 VMA
, SIZE
, LMA
, MAPPED
3291 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
3293 /* Throw away the cached copy of _ovly_table */
3295 simple_free_overlay_table (void)
3297 if (cache_ovly_table
)
3298 xfree (cache_ovly_table
);
3300 cache_ovly_table
= NULL
;
3301 cache_ovly_table_base
= 0;
3305 /* Throw away the cached copy of _ovly_region_table */
3307 simple_free_overlay_region_table (void)
3309 if (cache_ovly_region_table
)
3310 xfree (cache_ovly_region_table
);
3311 cache_novly_regions
= 0;
3312 cache_ovly_region_table
= NULL
;
3313 cache_ovly_region_table_base
= 0;
3317 /* Read an array of ints from the target into a local buffer.
3318 Convert to host order. int LEN is number of ints */
3320 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
, int len
)
3322 /* FIXME (alloca): Not safe if array is very large. */
3323 char *buf
= alloca (len
* TARGET_LONG_BYTES
);
3326 read_memory (memaddr
, buf
, len
* TARGET_LONG_BYTES
);
3327 for (i
= 0; i
< len
; i
++)
3328 myaddr
[i
] = extract_unsigned_integer (TARGET_LONG_BYTES
* i
+ buf
,
3332 /* Find and grab a copy of the target _ovly_table
3333 (and _novlys, which is needed for the table's size) */
3335 simple_read_overlay_table (void)
3337 struct minimal_symbol
*novlys_msym
, *ovly_table_msym
;
3339 simple_free_overlay_table ();
3340 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3343 error ("Error reading inferior's overlay table: "
3344 "couldn't find `_novlys' variable\n"
3345 "in inferior. Use `overlay manual' mode.");
3349 ovly_table_msym
= lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3350 if (! ovly_table_msym
)
3352 error ("Error reading inferior's overlay table: couldn't find "
3353 "`_ovly_table' array\n"
3354 "in inferior. Use `overlay manual' mode.");
3358 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
), 4);
3360 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3361 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3362 read_target_long_array (cache_ovly_table_base
,
3363 (int *) cache_ovly_table
,
3366 return 1; /* SUCCESS */
3370 /* Find and grab a copy of the target _ovly_region_table
3371 (and _novly_regions, which is needed for the table's size) */
3373 simple_read_overlay_region_table (void)
3375 struct minimal_symbol
*msym
;
3377 simple_free_overlay_region_table ();
3378 msym
= lookup_minimal_symbol ("_novly_regions", NULL
, NULL
);
3380 cache_novly_regions
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
3382 return 0; /* failure */
3383 cache_ovly_region_table
= (void *) xmalloc (cache_novly_regions
* 12);
3384 if (cache_ovly_region_table
!= NULL
)
3386 msym
= lookup_minimal_symbol ("_ovly_region_table", NULL
, NULL
);
3389 cache_ovly_region_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3390 read_target_long_array (cache_ovly_region_table_base
,
3391 (int *) cache_ovly_region_table
,
3392 cache_novly_regions
* 3);
3395 return 0; /* failure */
3398 return 0; /* failure */
3399 return 1; /* SUCCESS */
3403 /* Function: simple_overlay_update_1
3404 A helper function for simple_overlay_update. Assuming a cached copy
3405 of _ovly_table exists, look through it to find an entry whose vma,
3406 lma and size match those of OSECT. Re-read the entry and make sure
3407 it still matches OSECT (else the table may no longer be valid).
3408 Set OSECT's mapped state to match the entry. Return: 1 for
3409 success, 0 for failure. */
3412 simple_overlay_update_1 (struct obj_section
*osect
)
3415 bfd
*obfd
= osect
->objfile
->obfd
;
3416 asection
*bsect
= osect
->the_bfd_section
;
3418 size
= bfd_get_section_size (osect
->the_bfd_section
);
3419 for (i
= 0; i
< cache_novlys
; i
++)
3420 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3421 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3422 /* && cache_ovly_table[i][SIZE] == size */ )
3424 read_target_long_array (cache_ovly_table_base
+ i
* TARGET_LONG_BYTES
,
3425 (int *) cache_ovly_table
[i
], 4);
3426 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3427 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3428 /* && cache_ovly_table[i][SIZE] == size */ )
3430 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3433 else /* Warning! Warning! Target's ovly table has changed! */
3439 /* Function: simple_overlay_update
3440 If OSECT is NULL, then update all sections' mapped state
3441 (after re-reading the entire target _ovly_table).
3442 If OSECT is non-NULL, then try to find a matching entry in the
3443 cached ovly_table and update only OSECT's mapped state.
3444 If a cached entry can't be found or the cache isn't valid, then
3445 re-read the entire cache, and go ahead and update all sections. */
3448 simple_overlay_update (struct obj_section
*osect
)
3450 struct objfile
*objfile
;
3452 /* Were we given an osect to look up? NULL means do all of them. */
3454 /* Have we got a cached copy of the target's overlay table? */
3455 if (cache_ovly_table
!= NULL
)
3456 /* Does its cached location match what's currently in the symtab? */
3457 if (cache_ovly_table_base
==
3458 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL
, NULL
)))
3459 /* Then go ahead and try to look up this single section in the cache */
3460 if (simple_overlay_update_1 (osect
))
3461 /* Found it! We're done. */
3464 /* Cached table no good: need to read the entire table anew.
3465 Or else we want all the sections, in which case it's actually
3466 more efficient to read the whole table in one block anyway. */
3468 if (! simple_read_overlay_table ())
3471 /* Now may as well update all sections, even if only one was requested. */
3472 ALL_OBJSECTIONS (objfile
, osect
)
3473 if (section_is_overlay (osect
->the_bfd_section
))
3476 bfd
*obfd
= osect
->objfile
->obfd
;
3477 asection
*bsect
= osect
->the_bfd_section
;
3479 size
= bfd_get_section_size (bsect
);
3480 for (i
= 0; i
< cache_novlys
; i
++)
3481 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3482 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3483 /* && cache_ovly_table[i][SIZE] == size */ )
3484 { /* obj_section matches i'th entry in ovly_table */
3485 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3486 break; /* finished with inner for loop: break out */
3491 /* Set the output sections and output offsets for section SECTP in
3492 ABFD. The relocation code in BFD will read these offsets, so we
3493 need to be sure they're initialized. We map each section to itself,
3494 with no offset; this means that SECTP->vma will be honored. */
3497 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3499 sectp
->output_section
= sectp
;
3500 sectp
->output_offset
= 0;
3503 /* Relocate the contents of a debug section SECTP in ABFD. The
3504 contents are stored in BUF if it is non-NULL, or returned in a
3505 malloc'd buffer otherwise.
3507 For some platforms and debug info formats, shared libraries contain
3508 relocations against the debug sections (particularly for DWARF-2;
3509 one affected platform is PowerPC GNU/Linux, although it depends on
3510 the version of the linker in use). Also, ELF object files naturally
3511 have unresolved relocations for their debug sections. We need to apply
3512 the relocations in order to get the locations of symbols correct. */
3515 symfile_relocate_debug_section (bfd
*abfd
, asection
*sectp
, bfd_byte
*buf
)
3517 /* We're only interested in debugging sections with relocation
3519 if ((sectp
->flags
& SEC_RELOC
) == 0)
3521 if ((sectp
->flags
& SEC_DEBUGGING
) == 0)
3524 /* We will handle section offsets properly elsewhere, so relocate as if
3525 all sections begin at 0. */
3526 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3528 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3532 _initialize_symfile (void)
3534 struct cmd_list_element
*c
;
3536 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
,
3537 "Load symbol table from executable file FILE.\n\
3538 The `file' command can also load symbol tables, as well as setting the file\n\
3539 to execute.", &cmdlist
);
3540 set_cmd_completer (c
, filename_completer
);
3542 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
,
3543 "Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3544 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3545 ADDR is the starting address of the file's text.\n\
3546 The optional arguments are section-name section-address pairs and\n\
3547 should be specified if the data and bss segments are not contiguous\n\
3548 with the text. SECT is a section name to be loaded at SECT_ADDR.",
3550 set_cmd_completer (c
, filename_completer
);
3552 c
= add_cmd ("add-shared-symbol-files", class_files
,
3553 add_shared_symbol_files_command
,
3554 "Load the symbols from shared objects in the dynamic linker's link map.",
3556 c
= add_alias_cmd ("assf", "add-shared-symbol-files", class_files
, 1,
3559 c
= add_cmd ("load", class_files
, load_command
,
3560 "Dynamically load FILE into the running program, and record its symbols\n\
3561 for access from GDB.", &cmdlist
);
3562 set_cmd_completer (c
, filename_completer
);
3564 deprecated_add_show_from_set
3565 (add_set_cmd ("symbol-reloading", class_support
, var_boolean
,
3566 (char *) &symbol_reloading
,
3567 "Set dynamic symbol table reloading multiple times in one run.",
3571 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3572 "Commands for debugging overlays.", &overlaylist
,
3573 "overlay ", 0, &cmdlist
);
3575 add_com_alias ("ovly", "overlay", class_alias
, 1);
3576 add_com_alias ("ov", "overlay", class_alias
, 1);
3578 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3579 "Assert that an overlay section is mapped.", &overlaylist
);
3581 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3582 "Assert that an overlay section is unmapped.", &overlaylist
);
3584 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3585 "List mappings of overlay sections.", &overlaylist
);
3587 add_cmd ("manual", class_support
, overlay_manual_command
,
3588 "Enable overlay debugging.", &overlaylist
);
3589 add_cmd ("off", class_support
, overlay_off_command
,
3590 "Disable overlay debugging.", &overlaylist
);
3591 add_cmd ("auto", class_support
, overlay_auto_command
,
3592 "Enable automatic overlay debugging.", &overlaylist
);
3593 add_cmd ("load-target", class_support
, overlay_load_command
,
3594 "Read the overlay mapping state from the target.", &overlaylist
);
3596 /* Filename extension to source language lookup table: */
3597 init_filename_language_table ();
3598 c
= add_set_cmd ("extension-language", class_files
, var_string_noescape
,
3600 "Set mapping between filename extension and source language.\n\
3601 Usage: set extension-language .foo bar",
3603 set_cmd_cfunc (c
, set_ext_lang_command
);
3605 add_info ("extensions", info_ext_lang_command
,
3606 "All filename extensions associated with a source language.");
3608 deprecated_add_show_from_set
3609 (add_set_cmd ("download-write-size", class_obscure
,
3610 var_integer
, (char *) &download_write_size
,
3611 "Set the write size used when downloading a program.\n"
3612 "Only used when downloading a program onto a remote\n"
3613 "target. Specify zero, or a negative value, to disable\n"
3614 "blocked writes. The actual size of each transfer is also\n"
3615 "limited by the size of the target packet and the memory\n"
3620 debug_file_directory
= xstrdup (DEBUGDIR
);
3622 ("debug-file-directory", class_support
, var_string
,
3623 (char *) &debug_file_directory
,
3624 "Set the directory where separate debug symbols are searched for.\n"
3625 "Separate debug symbols are first searched for in the same\n"
3626 "directory as the binary, then in the `" DEBUG_SUBDIRECTORY
3628 "and lastly at the path of the directory of the binary with\n"
3629 "the global debug-file directory prepended\n",
3631 deprecated_add_show_from_set (c
, &showlist
);
3632 set_cmd_completer (c
, filename_completer
);