1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
5 Free Software Foundation, Inc.
7 Contributed by Cygnus Support, using pieces from other GDB modules.
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>. */
25 #include "arch-utils.h"
37 #include "breakpoint.h"
39 #include "complaints.h"
43 #include "filenames.h" /* for DOSish file names */
44 #include "gdb-stabs.h"
45 #include "gdb_obstack.h"
46 #include "completer.h"
49 #include "readline/readline.h"
50 #include "gdb_assert.h"
54 #include "parser-defs.h"
60 #include <sys/types.h>
62 #include "gdb_string.h"
69 int (*deprecated_ui_load_progress_hook
) (const char *section
, unsigned long num
);
70 void (*deprecated_show_load_progress
) (const char *section
,
71 unsigned long section_sent
,
72 unsigned long section_size
,
73 unsigned long total_sent
,
74 unsigned long total_size
);
75 void (*deprecated_pre_add_symbol_hook
) (const char *);
76 void (*deprecated_post_add_symbol_hook
) (void);
78 static void clear_symtab_users_cleanup (void *ignore
);
80 /* Global variables owned by this file */
81 int readnow_symbol_files
; /* Read full symbols immediately */
83 /* External variables and functions referenced. */
85 extern void report_transfer_performance (unsigned long, time_t, time_t);
87 /* Functions this file defines */
90 static int simple_read_overlay_region_table (void);
91 static void simple_free_overlay_region_table (void);
94 static void load_command (char *, int);
96 static void symbol_file_add_main_1 (char *args
, int from_tty
, int flags
);
98 static void add_symbol_file_command (char *, int);
100 bfd
*symfile_bfd_open (char *);
102 int get_section_index (struct objfile
*, char *);
104 static struct sym_fns
*find_sym_fns (bfd
*);
106 static void decrement_reading_symtab (void *);
108 static void overlay_invalidate_all (void);
110 void list_overlays_command (char *, int);
112 void map_overlay_command (char *, int);
114 void unmap_overlay_command (char *, int);
116 static void overlay_auto_command (char *, int);
118 static void overlay_manual_command (char *, int);
120 static void overlay_off_command (char *, int);
122 static void overlay_load_command (char *, int);
124 static void overlay_command (char *, int);
126 static void simple_free_overlay_table (void);
128 static void read_target_long_array (CORE_ADDR
, unsigned int *, int, int,
131 static int simple_read_overlay_table (void);
133 static int simple_overlay_update_1 (struct obj_section
*);
135 static void add_filename_language (char *ext
, enum language lang
);
137 static void info_ext_lang_command (char *args
, int from_tty
);
139 static void init_filename_language_table (void);
141 static void symfile_find_segment_sections (struct objfile
*objfile
);
143 void _initialize_symfile (void);
145 /* List of all available sym_fns. On gdb startup, each object file reader
146 calls add_symtab_fns() to register information on each format it is
149 static struct sym_fns
*symtab_fns
= NULL
;
151 /* Flag for whether user will be reloading symbols multiple times.
152 Defaults to ON for VxWorks, otherwise OFF. */
154 #ifdef SYMBOL_RELOADING_DEFAULT
155 int symbol_reloading
= SYMBOL_RELOADING_DEFAULT
;
157 int symbol_reloading
= 0;
160 show_symbol_reloading (struct ui_file
*file
, int from_tty
,
161 struct cmd_list_element
*c
, const char *value
)
163 fprintf_filtered (file
, _("\
164 Dynamic symbol table reloading multiple times in one run is %s.\n"),
168 /* If non-zero, shared library symbols will be added automatically
169 when the inferior is created, new libraries are loaded, or when
170 attaching to the inferior. This is almost always what users will
171 want to have happen; but for very large programs, the startup time
172 will be excessive, and so if this is a problem, the user can clear
173 this flag and then add the shared library symbols as needed. Note
174 that there is a potential for confusion, since if the shared
175 library symbols are not loaded, commands like "info fun" will *not*
176 report all the functions that are actually present. */
178 int auto_solib_add
= 1;
180 /* For systems that support it, a threshold size in megabytes. If
181 automatically adding a new library's symbol table to those already
182 known to the debugger would cause the total shared library symbol
183 size to exceed this threshhold, then the shlib's symbols are not
184 added. The threshold is ignored if the user explicitly asks for a
185 shlib to be added, such as when using the "sharedlibrary"
188 int auto_solib_limit
;
191 /* This compares two partial symbols by names, using strcmp_iw_ordered
192 for the comparison. */
195 compare_psymbols (const void *s1p
, const void *s2p
)
197 struct partial_symbol
*const *s1
= s1p
;
198 struct partial_symbol
*const *s2
= s2p
;
200 return strcmp_iw_ordered (SYMBOL_SEARCH_NAME (*s1
),
201 SYMBOL_SEARCH_NAME (*s2
));
205 sort_pst_symbols (struct partial_symtab
*pst
)
207 /* Sort the global list; don't sort the static list */
209 qsort (pst
->objfile
->global_psymbols
.list
+ pst
->globals_offset
,
210 pst
->n_global_syms
, sizeof (struct partial_symbol
*),
214 /* Make a null terminated copy of the string at PTR with SIZE characters in
215 the obstack pointed to by OBSTACKP . Returns the address of the copy.
216 Note that the string at PTR does not have to be null terminated, I.E. it
217 may be part of a larger string and we are only saving a substring. */
220 obsavestring (const char *ptr
, int size
, struct obstack
*obstackp
)
222 char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
223 /* Open-coded memcpy--saves function call time. These strings are usually
224 short. FIXME: Is this really still true with a compiler that can
227 const char *p1
= ptr
;
229 const char *end
= ptr
+ size
;
237 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
238 in the obstack pointed to by OBSTACKP. */
241 obconcat (struct obstack
*obstackp
, const char *s1
, const char *s2
,
244 int len
= strlen (s1
) + strlen (s2
) + strlen (s3
) + 1;
245 char *val
= (char *) obstack_alloc (obstackp
, len
);
252 /* True if we are nested inside psymtab_to_symtab. */
254 int currently_reading_symtab
= 0;
257 decrement_reading_symtab (void *dummy
)
259 currently_reading_symtab
--;
262 /* Get the symbol table that corresponds to a partial_symtab.
263 This is fast after the first time you do it. In fact, there
264 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
268 psymtab_to_symtab (struct partial_symtab
*pst
)
270 /* If it's been looked up before, return it. */
274 /* If it has not yet been read in, read it. */
277 struct cleanup
*back_to
= make_cleanup (decrement_reading_symtab
, NULL
);
278 currently_reading_symtab
++;
279 (*pst
->read_symtab
) (pst
);
280 do_cleanups (back_to
);
286 /* Remember the lowest-addressed loadable section we've seen.
287 This function is called via bfd_map_over_sections.
289 In case of equal vmas, the section with the largest size becomes the
290 lowest-addressed loadable section.
292 If the vmas and sizes are equal, the last section is considered the
293 lowest-addressed loadable section. */
296 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
298 asection
**lowest
= (asection
**) obj
;
300 if (0 == (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
))
303 *lowest
= sect
; /* First loadable section */
304 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
305 *lowest
= sect
; /* A lower loadable section */
306 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
307 && (bfd_section_size (abfd
, (*lowest
))
308 <= bfd_section_size (abfd
, sect
)))
312 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
314 struct section_addr_info
*
315 alloc_section_addr_info (size_t num_sections
)
317 struct section_addr_info
*sap
;
320 size
= (sizeof (struct section_addr_info
)
321 + sizeof (struct other_sections
) * (num_sections
- 1));
322 sap
= (struct section_addr_info
*) xmalloc (size
);
323 memset (sap
, 0, size
);
324 sap
->num_sections
= num_sections
;
329 /* Build (allocate and populate) a section_addr_info struct from
330 an existing section table. */
332 extern struct section_addr_info
*
333 build_section_addr_info_from_section_table (const struct target_section
*start
,
334 const struct target_section
*end
)
336 struct section_addr_info
*sap
;
337 const struct target_section
*stp
;
340 sap
= alloc_section_addr_info (end
- start
);
342 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
344 if (bfd_get_section_flags (stp
->bfd
,
345 stp
->the_bfd_section
) & (SEC_ALLOC
| SEC_LOAD
)
346 && oidx
< end
- start
)
348 sap
->other
[oidx
].addr
= stp
->addr
;
349 sap
->other
[oidx
].name
350 = xstrdup (bfd_section_name (stp
->bfd
, stp
->the_bfd_section
));
351 sap
->other
[oidx
].sectindex
= stp
->the_bfd_section
->index
;
359 /* Create a section_addr_info from section offsets in OBJFILE. */
361 struct section_addr_info
*
362 build_section_addr_info_from_objfile (const struct objfile
*objfile
)
364 struct section_addr_info
*sap
;
366 struct bfd_section
*sec
;
367 int addr_bit
= gdbarch_addr_bit (objfile
->gdbarch
);
368 CORE_ADDR mask
= CORE_ADDR_MAX
;
370 if (addr_bit
< (sizeof (CORE_ADDR
) * HOST_CHAR_BIT
))
371 mask
= ((CORE_ADDR
) 1 << addr_bit
) - 1;
373 sap
= alloc_section_addr_info (objfile
->num_sections
);
374 for (i
= 0, sec
= objfile
->obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
375 if (bfd_get_section_flags (objfile
->obfd
, sec
) & (SEC_ALLOC
| SEC_LOAD
))
377 sap
->other
[i
].addr
= (bfd_get_section_vma (objfile
->obfd
, sec
)
378 + objfile
->section_offsets
->offsets
[i
]) & mask
;
379 sap
->other
[i
].name
= xstrdup (bfd_get_section_name (objfile
->obfd
,
381 sap
->other
[i
].sectindex
= sec
->index
;
388 /* Free all memory allocated by build_section_addr_info_from_section_table. */
391 free_section_addr_info (struct section_addr_info
*sap
)
395 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
396 if (sap
->other
[idx
].name
)
397 xfree (sap
->other
[idx
].name
);
402 /* Initialize OBJFILE's sect_index_* members. */
404 init_objfile_sect_indices (struct objfile
*objfile
)
409 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
411 objfile
->sect_index_text
= sect
->index
;
413 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
415 objfile
->sect_index_data
= sect
->index
;
417 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
419 objfile
->sect_index_bss
= sect
->index
;
421 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
423 objfile
->sect_index_rodata
= sect
->index
;
425 /* This is where things get really weird... We MUST have valid
426 indices for the various sect_index_* members or gdb will abort.
427 So if for example, there is no ".text" section, we have to
428 accomodate that. First, check for a file with the standard
429 one or two segments. */
431 symfile_find_segment_sections (objfile
);
433 /* Except when explicitly adding symbol files at some address,
434 section_offsets contains nothing but zeros, so it doesn't matter
435 which slot in section_offsets the individual sect_index_* members
436 index into. So if they are all zero, it is safe to just point
437 all the currently uninitialized indices to the first slot. But
438 beware: if this is the main executable, it may be relocated
439 later, e.g. by the remote qOffsets packet, and then this will
440 be wrong! That's why we try segments first. */
442 for (i
= 0; i
< objfile
->num_sections
; i
++)
444 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
449 if (i
== objfile
->num_sections
)
451 if (objfile
->sect_index_text
== -1)
452 objfile
->sect_index_text
= 0;
453 if (objfile
->sect_index_data
== -1)
454 objfile
->sect_index_data
= 0;
455 if (objfile
->sect_index_bss
== -1)
456 objfile
->sect_index_bss
= 0;
457 if (objfile
->sect_index_rodata
== -1)
458 objfile
->sect_index_rodata
= 0;
462 /* The arguments to place_section. */
464 struct place_section_arg
466 struct section_offsets
*offsets
;
470 /* Find a unique offset to use for loadable section SECT if
471 the user did not provide an offset. */
474 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
476 struct place_section_arg
*arg
= obj
;
477 CORE_ADDR
*offsets
= arg
->offsets
->offsets
, start_addr
;
479 ULONGEST align
= ((ULONGEST
) 1) << bfd_get_section_alignment (abfd
, sect
);
481 /* We are only interested in allocated sections. */
482 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
485 /* If the user specified an offset, honor it. */
486 if (offsets
[sect
->index
] != 0)
489 /* Otherwise, let's try to find a place for the section. */
490 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
497 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
499 int indx
= cur_sec
->index
;
500 CORE_ADDR cur_offset
;
502 /* We don't need to compare against ourself. */
506 /* We can only conflict with allocated sections. */
507 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
510 /* If the section offset is 0, either the section has not been placed
511 yet, or it was the lowest section placed (in which case LOWEST
512 will be past its end). */
513 if (offsets
[indx
] == 0)
516 /* If this section would overlap us, then we must move up. */
517 if (start_addr
+ bfd_get_section_size (sect
) > offsets
[indx
]
518 && start_addr
< offsets
[indx
] + bfd_get_section_size (cur_sec
))
520 start_addr
= offsets
[indx
] + bfd_get_section_size (cur_sec
);
521 start_addr
= (start_addr
+ align
- 1) & -align
;
526 /* Otherwise, we appear to be OK. So far. */
531 offsets
[sect
->index
] = start_addr
;
532 arg
->lowest
= start_addr
+ bfd_get_section_size (sect
);
535 /* Store struct section_addr_info as prepared (made relative and with SECTINDEX
536 filled-in) by addr_info_make_relative into SECTION_OFFSETS of NUM_SECTIONS
540 relative_addr_info_to_section_offsets (struct section_offsets
*section_offsets
,
542 struct section_addr_info
*addrs
)
546 memset (section_offsets
, 0, SIZEOF_N_SECTION_OFFSETS (num_sections
));
548 /* Now calculate offsets for section that were specified by the caller. */
549 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
551 struct other_sections
*osp
;
553 osp
= &addrs
->other
[i
];
557 /* Record all sections in offsets */
558 /* The section_offsets in the objfile are here filled in using
560 section_offsets
->offsets
[osp
->sectindex
] = osp
->addr
;
564 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
565 also SECTINDEXes there. */
568 addr_info_make_relative (struct section_addr_info
*addrs
, bfd
*abfd
)
570 asection
*lower_sect
;
572 CORE_ADDR lower_offset
;
575 /* Find lowest loadable section to be used as starting point for
576 continguous sections. */
578 bfd_map_over_sections (abfd
, find_lowest_section
, &lower_sect
);
579 if (lower_sect
== NULL
)
581 warning (_("no loadable sections found in added symbol-file %s"),
582 bfd_get_filename (abfd
));
586 lower_offset
= bfd_section_vma (bfd_get_filename (abfd
), lower_sect
);
588 /* Calculate offsets for the loadable sections.
589 FIXME! Sections must be in order of increasing loadable section
590 so that contiguous sections can use the lower-offset!!!
592 Adjust offsets if the segments are not contiguous.
593 If the section is contiguous, its offset should be set to
594 the offset of the highest loadable section lower than it
595 (the loadable section directly below it in memory).
596 this_offset = lower_offset = lower_addr - lower_orig_addr */
598 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
600 if (addrs
->other
[i
].addr
!= 0)
602 sect
= bfd_get_section_by_name (abfd
, addrs
->other
[i
].name
);
605 addrs
->other
[i
].addr
-= bfd_section_vma (abfd
, sect
);
606 lower_offset
= addrs
->other
[i
].addr
;
607 /* This is the index used by BFD. */
608 addrs
->other
[i
].sectindex
= sect
->index
;
612 warning (_("section %s not found in %s"), addrs
->other
[i
].name
,
613 bfd_get_filename (abfd
));
614 addrs
->other
[i
].addr
= 0;
618 addrs
->other
[i
].addr
= lower_offset
;
622 /* Parse the user's idea of an offset for dynamic linking, into our idea
623 of how to represent it for fast symbol reading. This is the default
624 version of the sym_fns.sym_offsets function for symbol readers that
625 don't need to do anything special. It allocates a section_offsets table
626 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
629 default_symfile_offsets (struct objfile
*objfile
,
630 struct section_addr_info
*addrs
)
632 objfile
->num_sections
= bfd_count_sections (objfile
->obfd
);
633 objfile
->section_offsets
= (struct section_offsets
*)
634 obstack_alloc (&objfile
->objfile_obstack
,
635 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
636 relative_addr_info_to_section_offsets (objfile
->section_offsets
,
637 objfile
->num_sections
, addrs
);
639 /* For relocatable files, all loadable sections will start at zero.
640 The zero is meaningless, so try to pick arbitrary addresses such
641 that no loadable sections overlap. This algorithm is quadratic,
642 but the number of sections in a single object file is generally
644 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
646 struct place_section_arg arg
;
647 bfd
*abfd
= objfile
->obfd
;
649 CORE_ADDR lowest
= 0;
651 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
652 /* We do not expect this to happen; just skip this step if the
653 relocatable file has a section with an assigned VMA. */
654 if (bfd_section_vma (abfd
, cur_sec
) != 0)
659 CORE_ADDR
*offsets
= objfile
->section_offsets
->offsets
;
661 /* Pick non-overlapping offsets for sections the user did not
663 arg
.offsets
= objfile
->section_offsets
;
665 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
667 /* Correctly filling in the section offsets is not quite
668 enough. Relocatable files have two properties that
669 (most) shared objects do not:
671 - Their debug information will contain relocations. Some
672 shared libraries do also, but many do not, so this can not
675 - If there are multiple code sections they will be loaded
676 at different relative addresses in memory than they are
677 in the objfile, since all sections in the file will start
680 Because GDB has very limited ability to map from an
681 address in debug info to the correct code section,
682 it relies on adding SECT_OFF_TEXT to things which might be
683 code. If we clear all the section offsets, and set the
684 section VMAs instead, then symfile_relocate_debug_section
685 will return meaningful debug information pointing at the
688 GDB has too many different data structures for section
689 addresses - a bfd, objfile, and so_list all have section
690 tables, as does exec_ops. Some of these could probably
693 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
694 cur_sec
= cur_sec
->next
)
696 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
699 bfd_set_section_vma (abfd
, cur_sec
, offsets
[cur_sec
->index
]);
700 exec_set_section_address (bfd_get_filename (abfd
), cur_sec
->index
,
701 offsets
[cur_sec
->index
]);
702 offsets
[cur_sec
->index
] = 0;
707 /* Remember the bfd indexes for the .text, .data, .bss and
709 init_objfile_sect_indices (objfile
);
713 /* Divide the file into segments, which are individual relocatable units.
714 This is the default version of the sym_fns.sym_segments function for
715 symbol readers that do not have an explicit representation of segments.
716 It assumes that object files do not have segments, and fully linked
717 files have a single segment. */
719 struct symfile_segment_data
*
720 default_symfile_segments (bfd
*abfd
)
724 struct symfile_segment_data
*data
;
727 /* Relocatable files contain enough information to position each
728 loadable section independently; they should not be relocated
730 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
733 /* Make sure there is at least one loadable section in the file. */
734 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
736 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
744 low
= bfd_get_section_vma (abfd
, sect
);
745 high
= low
+ bfd_get_section_size (sect
);
747 data
= XZALLOC (struct symfile_segment_data
);
748 data
->num_segments
= 1;
749 data
->segment_bases
= XCALLOC (1, CORE_ADDR
);
750 data
->segment_sizes
= XCALLOC (1, CORE_ADDR
);
752 num_sections
= bfd_count_sections (abfd
);
753 data
->segment_info
= XCALLOC (num_sections
, int);
755 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
759 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
762 vma
= bfd_get_section_vma (abfd
, sect
);
765 if (vma
+ bfd_get_section_size (sect
) > high
)
766 high
= vma
+ bfd_get_section_size (sect
);
768 data
->segment_info
[i
] = 1;
771 data
->segment_bases
[0] = low
;
772 data
->segment_sizes
[0] = high
- low
;
777 /* Process a symbol file, as either the main file or as a dynamically
780 OBJFILE is where the symbols are to be read from.
782 ADDRS is the list of section load addresses. If the user has given
783 an 'add-symbol-file' command, then this is the list of offsets and
784 addresses he or she provided as arguments to the command; or, if
785 we're handling a shared library, these are the actual addresses the
786 sections are loaded at, according to the inferior's dynamic linker
787 (as gleaned by GDB's shared library code). We convert each address
788 into an offset from the section VMA's as it appears in the object
789 file, and then call the file's sym_offsets function to convert this
790 into a format-specific offset table --- a `struct section_offsets'.
791 If ADDRS is non-zero, OFFSETS must be zero.
793 OFFSETS is a table of section offsets already in the right
794 format-specific representation. NUM_OFFSETS is the number of
795 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
796 assume this is the proper table the call to sym_offsets described
797 above would produce. Instead of calling sym_offsets, we just dump
798 it right into objfile->section_offsets. (When we're re-reading
799 symbols from an objfile, we don't have the original load address
800 list any more; all we have is the section offset table.) If
801 OFFSETS is non-zero, ADDRS must be zero.
803 ADD_FLAGS encodes verbosity level, whether this is main symbol or
804 an extra symbol file such as dynamically loaded code, and wether
805 breakpoint reset should be deferred. */
808 syms_from_objfile (struct objfile
*objfile
,
809 struct section_addr_info
*addrs
,
810 struct section_offsets
*offsets
,
814 struct section_addr_info
*local_addr
= NULL
;
815 struct cleanup
*old_chain
;
816 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
818 gdb_assert (! (addrs
&& offsets
));
820 init_entry_point_info (objfile
);
821 objfile
->sf
= find_sym_fns (objfile
->obfd
);
823 if (objfile
->sf
== NULL
)
824 return; /* No symbols. */
826 /* Make sure that partially constructed symbol tables will be cleaned up
827 if an error occurs during symbol reading. */
828 old_chain
= make_cleanup_free_objfile (objfile
);
830 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
831 list. We now establish the convention that an addr of zero means
832 no load address was specified. */
833 if (! addrs
&& ! offsets
)
836 = alloc_section_addr_info (bfd_count_sections (objfile
->obfd
));
837 make_cleanup (xfree
, local_addr
);
841 /* Now either addrs or offsets is non-zero. */
845 /* We will modify the main symbol table, make sure that all its users
846 will be cleaned up if an error occurs during symbol reading. */
847 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
849 /* Since no error yet, throw away the old symbol table. */
851 if (symfile_objfile
!= NULL
)
853 free_objfile (symfile_objfile
);
854 gdb_assert (symfile_objfile
== NULL
);
857 /* Currently we keep symbols from the add-symbol-file command.
858 If the user wants to get rid of them, they should do "symbol-file"
859 without arguments first. Not sure this is the best behavior
862 (*objfile
->sf
->sym_new_init
) (objfile
);
865 /* Convert addr into an offset rather than an absolute address.
866 We find the lowest address of a loaded segment in the objfile,
867 and assume that <addr> is where that got loaded.
869 We no longer warn if the lowest section is not a text segment (as
870 happens for the PA64 port. */
871 if (addrs
&& addrs
->other
[0].name
)
872 addr_info_make_relative (addrs
, objfile
->obfd
);
874 /* Initialize symbol reading routines for this objfile, allow complaints to
875 appear for this new file, and record how verbose to be, then do the
876 initial symbol reading for this file. */
878 (*objfile
->sf
->sym_init
) (objfile
);
879 clear_complaints (&symfile_complaints
, 1, add_flags
& SYMFILE_VERBOSE
);
882 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
885 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_offsets
);
887 /* Just copy in the offset table directly as given to us. */
888 objfile
->num_sections
= num_offsets
;
889 objfile
->section_offsets
890 = ((struct section_offsets
*)
891 obstack_alloc (&objfile
->objfile_obstack
, size
));
892 memcpy (objfile
->section_offsets
, offsets
, size
);
894 init_objfile_sect_indices (objfile
);
897 (*objfile
->sf
->sym_read
) (objfile
, add_flags
);
899 /* Discard cleanups as symbol reading was successful. */
901 discard_cleanups (old_chain
);
905 /* Perform required actions after either reading in the initial
906 symbols for a new objfile, or mapping in the symbols from a reusable
910 new_symfile_objfile (struct objfile
*objfile
, int add_flags
)
913 /* If this is the main symbol file we have to clean up all users of the
914 old main symbol file. Otherwise it is sufficient to fixup all the
915 breakpoints that may have been redefined by this symbol file. */
916 if (add_flags
& SYMFILE_MAINLINE
)
918 /* OK, make it the "real" symbol file. */
919 symfile_objfile
= objfile
;
921 clear_symtab_users ();
923 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
925 breakpoint_re_set ();
928 /* We're done reading the symbol file; finish off complaints. */
929 clear_complaints (&symfile_complaints
, 0, add_flags
& SYMFILE_VERBOSE
);
932 /* Process a symbol file, as either the main file or as a dynamically
935 ABFD is a BFD already open on the file, as from symfile_bfd_open.
936 This BFD will be closed on error, and is always consumed by this function.
938 ADD_FLAGS encodes verbosity, whether this is main symbol file or
939 extra, such as dynamically loaded code, and what to do with breakpoins.
941 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
942 syms_from_objfile, above.
943 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
945 Upon success, returns a pointer to the objfile that was added.
946 Upon failure, jumps back to command level (never returns). */
948 static struct objfile
*
949 symbol_file_add_with_addrs_or_offsets (bfd
*abfd
,
951 struct section_addr_info
*addrs
,
952 struct section_offsets
*offsets
,
956 struct objfile
*objfile
;
957 struct partial_symtab
*psymtab
;
958 struct cleanup
*my_cleanups
;
959 const char *name
= bfd_get_filename (abfd
);
960 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
962 my_cleanups
= make_cleanup_bfd_close (abfd
);
964 /* Give user a chance to burp if we'd be
965 interactively wiping out any existing symbols. */
967 if ((have_full_symbols () || have_partial_symbols ())
968 && (add_flags
& SYMFILE_MAINLINE
)
970 && !query (_("Load new symbol table from \"%s\"? "), name
))
971 error (_("Not confirmed."));
973 objfile
= allocate_objfile (abfd
, flags
);
974 discard_cleanups (my_cleanups
);
976 /* We either created a new mapped symbol table, mapped an existing
977 symbol table file which has not had initial symbol reading
978 performed, or need to read an unmapped symbol table. */
979 if (from_tty
|| info_verbose
)
981 if (deprecated_pre_add_symbol_hook
)
982 deprecated_pre_add_symbol_hook (name
);
985 printf_unfiltered (_("Reading symbols from %s..."), name
);
987 gdb_flush (gdb_stdout
);
990 syms_from_objfile (objfile
, addrs
, offsets
, num_offsets
,
993 /* We now have at least a partial symbol table. Check to see if the
994 user requested that all symbols be read on initial access via either
995 the gdb startup command line or on a per symbol file basis. Expand
996 all partial symbol tables for this objfile if so. */
998 if ((flags
& OBJF_READNOW
) || readnow_symbol_files
)
1000 if (from_tty
|| info_verbose
)
1002 printf_unfiltered (_("expanding to full symbols..."));
1004 gdb_flush (gdb_stdout
);
1007 for (psymtab
= objfile
->psymtabs
;
1009 psymtab
= psymtab
->next
)
1011 psymtab_to_symtab (psymtab
);
1015 if ((from_tty
|| info_verbose
)
1016 && !objfile_has_symbols (objfile
))
1019 printf_unfiltered (_("(no debugging symbols found)..."));
1023 if (from_tty
|| info_verbose
)
1025 if (deprecated_post_add_symbol_hook
)
1026 deprecated_post_add_symbol_hook ();
1028 printf_unfiltered (_("done.\n"));
1031 /* We print some messages regardless of whether 'from_tty ||
1032 info_verbose' is true, so make sure they go out at the right
1034 gdb_flush (gdb_stdout
);
1036 do_cleanups (my_cleanups
);
1038 if (objfile
->sf
== NULL
)
1040 observer_notify_new_objfile (objfile
);
1041 return objfile
; /* No symbols. */
1044 new_symfile_objfile (objfile
, add_flags
);
1046 observer_notify_new_objfile (objfile
);
1048 bfd_cache_close_all ();
1052 /* Add BFD as a separate debug file for OBJFILE. */
1055 symbol_file_add_separate (bfd
*bfd
, int symfile_flags
, struct objfile
*objfile
)
1057 struct objfile
*new_objfile
;
1058 struct section_addr_info
*sap
;
1059 struct cleanup
*my_cleanup
;
1061 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1062 because sections of BFD may not match sections of OBJFILE and because
1063 vma may have been modified by tools such as prelink. */
1064 sap
= build_section_addr_info_from_objfile (objfile
);
1065 my_cleanup
= make_cleanup_free_section_addr_info (sap
);
1067 new_objfile
= symbol_file_add_with_addrs_or_offsets
1068 (bfd
, symfile_flags
,
1070 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1071 | OBJF_USERLOADED
));
1073 do_cleanups (my_cleanup
);
1075 add_separate_debug_objfile (new_objfile
, objfile
);
1078 /* Process the symbol file ABFD, as either the main file or as a
1079 dynamically loaded file.
1081 See symbol_file_add_with_addrs_or_offsets's comments for
1084 symbol_file_add_from_bfd (bfd
*abfd
, int add_flags
,
1085 struct section_addr_info
*addrs
,
1088 return symbol_file_add_with_addrs_or_offsets (abfd
, add_flags
, addrs
, 0, 0,
1093 /* Process a symbol file, as either the main file or as a dynamically
1094 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
1097 symbol_file_add (char *name
, int add_flags
, struct section_addr_info
*addrs
,
1100 return symbol_file_add_from_bfd (symfile_bfd_open (name
), add_flags
, addrs
,
1105 /* Call symbol_file_add() with default values and update whatever is
1106 affected by the loading of a new main().
1107 Used when the file is supplied in the gdb command line
1108 and by some targets with special loading requirements.
1109 The auxiliary function, symbol_file_add_main_1(), has the flags
1110 argument for the switches that can only be specified in the symbol_file
1114 symbol_file_add_main (char *args
, int from_tty
)
1116 symbol_file_add_main_1 (args
, from_tty
, 0);
1120 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
1122 const int add_flags
= SYMFILE_MAINLINE
| (from_tty
? SYMFILE_VERBOSE
: 0);
1123 symbol_file_add (args
, add_flags
, NULL
, flags
);
1125 /* Getting new symbols may change our opinion about
1126 what is frameless. */
1127 reinit_frame_cache ();
1129 set_initial_language ();
1133 symbol_file_clear (int from_tty
)
1135 if ((have_full_symbols () || have_partial_symbols ())
1138 ? !query (_("Discard symbol table from `%s'? "),
1139 symfile_objfile
->name
)
1140 : !query (_("Discard symbol table? "))))
1141 error (_("Not confirmed."));
1143 free_all_objfiles ();
1145 /* solib descriptors may have handles to objfiles. Since their
1146 storage has just been released, we'd better wipe the solib
1147 descriptors as well. */
1148 no_shared_libraries (NULL
, from_tty
);
1150 gdb_assert (symfile_objfile
== NULL
);
1152 printf_unfiltered (_("No symbol file now.\n"));
1156 get_debug_link_info (struct objfile
*objfile
, unsigned long *crc32_out
)
1159 bfd_size_type debuglink_size
;
1160 unsigned long crc32
;
1165 sect
= bfd_get_section_by_name (objfile
->obfd
, ".gnu_debuglink");
1170 debuglink_size
= bfd_section_size (objfile
->obfd
, sect
);
1172 contents
= xmalloc (debuglink_size
);
1173 bfd_get_section_contents (objfile
->obfd
, sect
, contents
,
1174 (file_ptr
)0, (bfd_size_type
)debuglink_size
);
1176 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1177 crc_offset
= strlen (contents
) + 1;
1178 crc_offset
= (crc_offset
+ 3) & ~3;
1180 crc32
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) (contents
+ crc_offset
));
1187 separate_debug_file_exists (const char *name
, unsigned long crc
,
1188 struct objfile
*parent_objfile
)
1190 unsigned long file_crc
= 0;
1192 gdb_byte buffer
[8*1024];
1194 struct stat parent_stat
, abfd_stat
;
1196 /* Find a separate debug info file as if symbols would be present in
1197 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1198 section can contain just the basename of PARENT_OBJFILE without any
1199 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1200 the separate debug infos with the same basename can exist. */
1202 if (strcmp (name
, parent_objfile
->name
) == 0)
1205 abfd
= bfd_open_maybe_remote (name
);
1210 /* Verify symlinks were not the cause of strcmp name difference above.
1212 Some operating systems, e.g. Windows, do not provide a meaningful
1213 st_ino; they always set it to zero. (Windows does provide a
1214 meaningful st_dev.) Do not indicate a duplicate library in that
1215 case. While there is no guarantee that a system that provides
1216 meaningful inode numbers will never set st_ino to zero, this is
1217 merely an optimization, so we do not need to worry about false
1220 if (bfd_stat (abfd
, &abfd_stat
) == 0
1221 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0
1222 && abfd_stat
.st_dev
== parent_stat
.st_dev
1223 && abfd_stat
.st_ino
== parent_stat
.st_ino
1224 && abfd_stat
.st_ino
!= 0)
1230 while ((count
= bfd_bread (buffer
, sizeof (buffer
), abfd
)) > 0)
1231 file_crc
= gnu_debuglink_crc32 (file_crc
, buffer
, count
);
1235 if (crc
!= file_crc
)
1237 warning (_("the debug information found in \"%s\""
1238 " does not match \"%s\" (CRC mismatch).\n"),
1239 name
, parent_objfile
->name
);
1246 char *debug_file_directory
= NULL
;
1248 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1249 struct cmd_list_element
*c
, const char *value
)
1251 fprintf_filtered (file
, _("\
1252 The directory where separate debug symbols are searched for is \"%s\".\n"),
1256 #if ! defined (DEBUG_SUBDIRECTORY)
1257 #define DEBUG_SUBDIRECTORY ".debug"
1261 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1264 char *basename
, *name_copy
, *debugdir
;
1266 char *debugfile
= NULL
;
1267 char *canon_name
= NULL
;
1268 bfd_size_type debuglink_size
;
1269 unsigned long crc32
;
1272 basename
= get_debug_link_info (objfile
, &crc32
);
1274 if (basename
== NULL
)
1275 /* There's no separate debug info, hence there's no way we could
1276 load it => no warning. */
1277 goto cleanup_return_debugfile
;
1279 dir
= xstrdup (objfile
->name
);
1281 /* Strip off the final filename part, leaving the directory name,
1282 followed by a slash. Objfile names should always be absolute and
1283 tilde-expanded, so there should always be a slash in there
1285 for (i
= strlen(dir
) - 1; i
>= 0; i
--)
1287 if (IS_DIR_SEPARATOR (dir
[i
]))
1290 gdb_assert (i
>= 0 && IS_DIR_SEPARATOR (dir
[i
]));
1293 /* Set I to max (strlen (canon_name), strlen (dir)). */
1294 canon_name
= lrealpath (dir
);
1296 if (canon_name
&& strlen (canon_name
) > i
)
1297 i
= strlen (canon_name
);
1299 debugfile
= xmalloc (strlen (debug_file_directory
) + 1
1301 + strlen (DEBUG_SUBDIRECTORY
)
1306 /* First try in the same directory as the original file. */
1307 strcpy (debugfile
, dir
);
1308 strcat (debugfile
, basename
);
1310 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1311 goto cleanup_return_debugfile
;
1313 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1314 strcpy (debugfile
, dir
);
1315 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1316 strcat (debugfile
, "/");
1317 strcat (debugfile
, basename
);
1319 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1320 goto cleanup_return_debugfile
;
1322 /* Then try in the global debugfile directories.
1324 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1325 cause "/..." lookups. */
1327 debugdir
= debug_file_directory
;
1332 while (*debugdir
== DIRNAME_SEPARATOR
)
1335 debugdir_end
= strchr (debugdir
, DIRNAME_SEPARATOR
);
1336 if (debugdir_end
== NULL
)
1337 debugdir_end
= &debugdir
[strlen (debugdir
)];
1339 memcpy (debugfile
, debugdir
, debugdir_end
- debugdir
);
1340 debugfile
[debugdir_end
- debugdir
] = 0;
1341 strcat (debugfile
, "/");
1342 strcat (debugfile
, dir
);
1343 strcat (debugfile
, basename
);
1345 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1346 goto cleanup_return_debugfile
;
1348 /* If the file is in the sysroot, try using its base path in the
1349 global debugfile directory. */
1351 && strncmp (canon_name
, gdb_sysroot
, strlen (gdb_sysroot
)) == 0
1352 && IS_DIR_SEPARATOR (canon_name
[strlen (gdb_sysroot
)]))
1354 memcpy (debugfile
, debugdir
, debugdir_end
- debugdir
);
1355 debugfile
[debugdir_end
- debugdir
] = 0;
1356 strcat (debugfile
, canon_name
+ strlen (gdb_sysroot
));
1357 strcat (debugfile
, "/");
1358 strcat (debugfile
, basename
);
1360 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1361 goto cleanup_return_debugfile
;
1364 debugdir
= debugdir_end
;
1366 while (*debugdir
!= 0);
1371 cleanup_return_debugfile
:
1379 /* This is the symbol-file command. Read the file, analyze its
1380 symbols, and add a struct symtab to a symtab list. The syntax of
1381 the command is rather bizarre:
1383 1. The function buildargv implements various quoting conventions
1384 which are undocumented and have little or nothing in common with
1385 the way things are quoted (or not quoted) elsewhere in GDB.
1387 2. Options are used, which are not generally used in GDB (perhaps
1388 "set mapped on", "set readnow on" would be better)
1390 3. The order of options matters, which is contrary to GNU
1391 conventions (because it is confusing and inconvenient). */
1394 symbol_file_command (char *args
, int from_tty
)
1400 symbol_file_clear (from_tty
);
1404 char **argv
= gdb_buildargv (args
);
1405 int flags
= OBJF_USERLOADED
;
1406 struct cleanup
*cleanups
;
1409 cleanups
= make_cleanup_freeargv (argv
);
1410 while (*argv
!= NULL
)
1412 if (strcmp (*argv
, "-readnow") == 0)
1413 flags
|= OBJF_READNOW
;
1414 else if (**argv
== '-')
1415 error (_("unknown option `%s'"), *argv
);
1418 symbol_file_add_main_1 (*argv
, from_tty
, flags
);
1426 error (_("no symbol file name was specified"));
1428 do_cleanups (cleanups
);
1432 /* Set the initial language.
1434 FIXME: A better solution would be to record the language in the
1435 psymtab when reading partial symbols, and then use it (if known) to
1436 set the language. This would be a win for formats that encode the
1437 language in an easily discoverable place, such as DWARF. For
1438 stabs, we can jump through hoops looking for specially named
1439 symbols or try to intuit the language from the specific type of
1440 stabs we find, but we can't do that until later when we read in
1444 set_initial_language (void)
1446 struct partial_symtab
*pst
;
1447 enum language lang
= language_unknown
;
1449 pst
= find_main_psymtab ();
1452 if (pst
->filename
!= NULL
)
1453 lang
= deduce_language_from_filename (pst
->filename
);
1455 if (lang
== language_unknown
)
1457 /* Make C the default language */
1461 set_language (lang
);
1462 expected_language
= current_language
; /* Don't warn the user. */
1466 /* If NAME is a remote name open the file using remote protocol, otherwise
1467 open it normally. */
1470 bfd_open_maybe_remote (const char *name
)
1472 if (remote_filename_p (name
))
1473 return remote_bfd_open (name
, gnutarget
);
1475 return bfd_openr (name
, gnutarget
);
1479 /* Open the file specified by NAME and hand it off to BFD for
1480 preliminary analysis. Return a newly initialized bfd *, which
1481 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1482 absolute). In case of trouble, error() is called. */
1485 symfile_bfd_open (char *name
)
1489 char *absolute_name
;
1491 if (remote_filename_p (name
))
1493 name
= xstrdup (name
);
1494 sym_bfd
= remote_bfd_open (name
, gnutarget
);
1497 make_cleanup (xfree
, name
);
1498 error (_("`%s': can't open to read symbols: %s."), name
,
1499 bfd_errmsg (bfd_get_error ()));
1502 if (!bfd_check_format (sym_bfd
, bfd_object
))
1504 bfd_close (sym_bfd
);
1505 make_cleanup (xfree
, name
);
1506 error (_("`%s': can't read symbols: %s."), name
,
1507 bfd_errmsg (bfd_get_error ()));
1513 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy. */
1515 /* Look down path for it, allocate 2nd new malloc'd copy. */
1516 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, name
,
1517 O_RDONLY
| O_BINARY
, &absolute_name
);
1518 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1521 char *exename
= alloca (strlen (name
) + 5);
1522 strcat (strcpy (exename
, name
), ".exe");
1523 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, exename
,
1524 O_RDONLY
| O_BINARY
, &absolute_name
);
1529 make_cleanup (xfree
, name
);
1530 perror_with_name (name
);
1533 /* Free 1st new malloc'd copy, but keep the 2nd malloc'd copy in
1534 bfd. It'll be freed in free_objfile(). */
1536 name
= absolute_name
;
1538 sym_bfd
= bfd_fopen (name
, gnutarget
, FOPEN_RB
, desc
);
1542 make_cleanup (xfree
, name
);
1543 error (_("`%s': can't open to read symbols: %s."), name
,
1544 bfd_errmsg (bfd_get_error ()));
1546 bfd_set_cacheable (sym_bfd
, 1);
1548 if (!bfd_check_format (sym_bfd
, bfd_object
))
1550 /* FIXME: should be checking for errors from bfd_close (for one
1551 thing, on error it does not free all the storage associated
1553 bfd_close (sym_bfd
); /* This also closes desc. */
1554 make_cleanup (xfree
, name
);
1555 error (_("`%s': can't read symbols: %s."), name
,
1556 bfd_errmsg (bfd_get_error ()));
1559 /* bfd_usrdata exists for applications and libbfd must not touch it. */
1560 gdb_assert (bfd_usrdata (sym_bfd
) == NULL
);
1565 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1566 the section was not found. */
1569 get_section_index (struct objfile
*objfile
, char *section_name
)
1571 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1579 /* Link SF into the global symtab_fns list. Called on startup by the
1580 _initialize routine in each object file format reader, to register
1581 information about each format the the reader is prepared to
1585 add_symtab_fns (struct sym_fns
*sf
)
1587 sf
->next
= symtab_fns
;
1591 /* Initialize OBJFILE to read symbols from its associated BFD. It
1592 either returns or calls error(). The result is an initialized
1593 struct sym_fns in the objfile structure, that contains cached
1594 information about the symbol file. */
1596 static struct sym_fns
*
1597 find_sym_fns (bfd
*abfd
)
1600 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1602 if (our_flavour
== bfd_target_srec_flavour
1603 || our_flavour
== bfd_target_ihex_flavour
1604 || our_flavour
== bfd_target_tekhex_flavour
)
1605 return NULL
; /* No symbols. */
1607 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
->next
)
1608 if (our_flavour
== sf
->sym_flavour
)
1611 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1612 bfd_get_target (abfd
));
1616 /* This function runs the load command of our current target. */
1619 load_command (char *arg
, int from_tty
)
1621 /* The user might be reloading because the binary has changed. Take
1622 this opportunity to check. */
1623 reopen_exec_file ();
1631 parg
= arg
= get_exec_file (1);
1633 /* Count how many \ " ' tab space there are in the name. */
1634 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1642 /* We need to quote this string so buildargv can pull it apart. */
1643 char *temp
= xmalloc (strlen (arg
) + count
+ 1 );
1647 make_cleanup (xfree
, temp
);
1650 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1652 strncpy (ptemp
, prev
, parg
- prev
);
1653 ptemp
+= parg
- prev
;
1657 strcpy (ptemp
, prev
);
1663 target_load (arg
, from_tty
);
1665 /* After re-loading the executable, we don't really know which
1666 overlays are mapped any more. */
1667 overlay_cache_invalid
= 1;
1670 /* This version of "load" should be usable for any target. Currently
1671 it is just used for remote targets, not inftarg.c or core files,
1672 on the theory that only in that case is it useful.
1674 Avoiding xmodem and the like seems like a win (a) because we don't have
1675 to worry about finding it, and (b) On VMS, fork() is very slow and so
1676 we don't want to run a subprocess. On the other hand, I'm not sure how
1677 performance compares. */
1679 static int validate_download
= 0;
1681 /* Callback service function for generic_load (bfd_map_over_sections). */
1684 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1686 bfd_size_type
*sum
= data
;
1688 *sum
+= bfd_get_section_size (asec
);
1691 /* Opaque data for load_section_callback. */
1692 struct load_section_data
{
1693 unsigned long load_offset
;
1694 struct load_progress_data
*progress_data
;
1695 VEC(memory_write_request_s
) *requests
;
1698 /* Opaque data for load_progress. */
1699 struct load_progress_data
{
1700 /* Cumulative data. */
1701 unsigned long write_count
;
1702 unsigned long data_count
;
1703 bfd_size_type total_size
;
1706 /* Opaque data for load_progress for a single section. */
1707 struct load_progress_section_data
{
1708 struct load_progress_data
*cumulative
;
1710 /* Per-section data. */
1711 const char *section_name
;
1712 ULONGEST section_sent
;
1713 ULONGEST section_size
;
1718 /* Target write callback routine for progress reporting. */
1721 load_progress (ULONGEST bytes
, void *untyped_arg
)
1723 struct load_progress_section_data
*args
= untyped_arg
;
1724 struct load_progress_data
*totals
;
1727 /* Writing padding data. No easy way to get at the cumulative
1728 stats, so just ignore this. */
1731 totals
= args
->cumulative
;
1733 if (bytes
== 0 && args
->section_sent
== 0)
1735 /* The write is just starting. Let the user know we've started
1737 ui_out_message (uiout
, 0, "Loading section %s, size %s lma %s\n",
1738 args
->section_name
, hex_string (args
->section_size
),
1739 paddress (target_gdbarch
, args
->lma
));
1743 if (validate_download
)
1745 /* Broken memories and broken monitors manifest themselves here
1746 when bring new computers to life. This doubles already slow
1748 /* NOTE: cagney/1999-10-18: A more efficient implementation
1749 might add a verify_memory() method to the target vector and
1750 then use that. remote.c could implement that method using
1751 the ``qCRC'' packet. */
1752 gdb_byte
*check
= xmalloc (bytes
);
1753 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
1755 if (target_read_memory (args
->lma
, check
, bytes
) != 0)
1756 error (_("Download verify read failed at %s"),
1757 paddress (target_gdbarch
, args
->lma
));
1758 if (memcmp (args
->buffer
, check
, bytes
) != 0)
1759 error (_("Download verify compare failed at %s"),
1760 paddress (target_gdbarch
, args
->lma
));
1761 do_cleanups (verify_cleanups
);
1763 totals
->data_count
+= bytes
;
1765 args
->buffer
+= bytes
;
1766 totals
->write_count
+= 1;
1767 args
->section_sent
+= bytes
;
1769 || (deprecated_ui_load_progress_hook
!= NULL
1770 && deprecated_ui_load_progress_hook (args
->section_name
,
1771 args
->section_sent
)))
1772 error (_("Canceled the download"));
1774 if (deprecated_show_load_progress
!= NULL
)
1775 deprecated_show_load_progress (args
->section_name
,
1779 totals
->total_size
);
1782 /* Callback service function for generic_load (bfd_map_over_sections). */
1785 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1787 struct memory_write_request
*new_request
;
1788 struct load_section_data
*args
= data
;
1789 struct load_progress_section_data
*section_data
;
1790 bfd_size_type size
= bfd_get_section_size (asec
);
1792 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1794 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
1800 new_request
= VEC_safe_push (memory_write_request_s
,
1801 args
->requests
, NULL
);
1802 memset (new_request
, 0, sizeof (struct memory_write_request
));
1803 section_data
= xcalloc (1, sizeof (struct load_progress_section_data
));
1804 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1805 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size be in instead? */
1806 new_request
->data
= xmalloc (size
);
1807 new_request
->baton
= section_data
;
1809 buffer
= new_request
->data
;
1811 section_data
->cumulative
= args
->progress_data
;
1812 section_data
->section_name
= sect_name
;
1813 section_data
->section_size
= size
;
1814 section_data
->lma
= new_request
->begin
;
1815 section_data
->buffer
= buffer
;
1817 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1820 /* Clean up an entire memory request vector, including load
1821 data and progress records. */
1824 clear_memory_write_data (void *arg
)
1826 VEC(memory_write_request_s
) **vec_p
= arg
;
1827 VEC(memory_write_request_s
) *vec
= *vec_p
;
1829 struct memory_write_request
*mr
;
1831 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
1836 VEC_free (memory_write_request_s
, vec
);
1840 generic_load (char *args
, int from_tty
)
1843 struct timeval start_time
, end_time
;
1845 struct cleanup
*old_cleanups
= make_cleanup (null_cleanup
, 0);
1846 struct load_section_data cbdata
;
1847 struct load_progress_data total_progress
;
1852 memset (&cbdata
, 0, sizeof (cbdata
));
1853 memset (&total_progress
, 0, sizeof (total_progress
));
1854 cbdata
.progress_data
= &total_progress
;
1856 make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
1859 error_no_arg (_("file to load"));
1861 argv
= gdb_buildargv (args
);
1862 make_cleanup_freeargv (argv
);
1864 filename
= tilde_expand (argv
[0]);
1865 make_cleanup (xfree
, filename
);
1867 if (argv
[1] != NULL
)
1871 cbdata
.load_offset
= strtoul (argv
[1], &endptr
, 0);
1873 /* If the last word was not a valid number then
1874 treat it as a file name with spaces in. */
1875 if (argv
[1] == endptr
)
1876 error (_("Invalid download offset:%s."), argv
[1]);
1878 if (argv
[2] != NULL
)
1879 error (_("Too many parameters."));
1882 /* Open the file for loading. */
1883 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
1884 if (loadfile_bfd
== NULL
)
1886 perror_with_name (filename
);
1890 /* FIXME: should be checking for errors from bfd_close (for one thing,
1891 on error it does not free all the storage associated with the
1893 make_cleanup_bfd_close (loadfile_bfd
);
1895 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
1897 error (_("\"%s\" is not an object file: %s"), filename
,
1898 bfd_errmsg (bfd_get_error ()));
1901 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
1902 (void *) &total_progress
.total_size
);
1904 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
1906 gettimeofday (&start_time
, NULL
);
1908 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
1909 load_progress
) != 0)
1910 error (_("Load failed"));
1912 gettimeofday (&end_time
, NULL
);
1914 entry
= bfd_get_start_address (loadfile_bfd
);
1915 ui_out_text (uiout
, "Start address ");
1916 ui_out_field_fmt (uiout
, "address", "%s", paddress (target_gdbarch
, entry
));
1917 ui_out_text (uiout
, ", load size ");
1918 ui_out_field_fmt (uiout
, "load-size", "%lu", total_progress
.data_count
);
1919 ui_out_text (uiout
, "\n");
1920 /* We were doing this in remote-mips.c, I suspect it is right
1921 for other targets too. */
1922 regcache_write_pc (get_current_regcache (), entry
);
1924 /* FIXME: are we supposed to call symbol_file_add or not? According
1925 to a comment from remote-mips.c (where a call to symbol_file_add
1926 was commented out), making the call confuses GDB if more than one
1927 file is loaded in. Some targets do (e.g., remote-vx.c) but
1928 others don't (or didn't - perhaps they have all been deleted). */
1930 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
1931 total_progress
.write_count
,
1932 &start_time
, &end_time
);
1934 do_cleanups (old_cleanups
);
1937 /* Report how fast the transfer went. */
1939 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1940 replaced by print_transfer_performance (with a very different
1941 function signature). */
1944 report_transfer_performance (unsigned long data_count
, time_t start_time
,
1947 struct timeval start
, end
;
1949 start
.tv_sec
= start_time
;
1951 end
.tv_sec
= end_time
;
1954 print_transfer_performance (gdb_stdout
, data_count
, 0, &start
, &end
);
1958 print_transfer_performance (struct ui_file
*stream
,
1959 unsigned long data_count
,
1960 unsigned long write_count
,
1961 const struct timeval
*start_time
,
1962 const struct timeval
*end_time
)
1964 ULONGEST time_count
;
1966 /* Compute the elapsed time in milliseconds, as a tradeoff between
1967 accuracy and overflow. */
1968 time_count
= (end_time
->tv_sec
- start_time
->tv_sec
) * 1000;
1969 time_count
+= (end_time
->tv_usec
- start_time
->tv_usec
) / 1000;
1971 ui_out_text (uiout
, "Transfer rate: ");
1974 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / time_count
;
1976 if (ui_out_is_mi_like_p (uiout
))
1978 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
* 8);
1979 ui_out_text (uiout
, " bits/sec");
1981 else if (rate
< 1024)
1983 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
);
1984 ui_out_text (uiout
, " bytes/sec");
1988 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
/ 1024);
1989 ui_out_text (uiout
, " KB/sec");
1994 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
1995 ui_out_text (uiout
, " bits in <1 sec");
1997 if (write_count
> 0)
1999 ui_out_text (uiout
, ", ");
2000 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
2001 ui_out_text (uiout
, " bytes/write");
2003 ui_out_text (uiout
, ".\n");
2006 /* This function allows the addition of incrementally linked object files.
2007 It does not modify any state in the target, only in the debugger. */
2008 /* Note: ezannoni 2000-04-13 This function/command used to have a
2009 special case syntax for the rombug target (Rombug is the boot
2010 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2011 rombug case, the user doesn't need to supply a text address,
2012 instead a call to target_link() (in target.c) would supply the
2013 value to use. We are now discontinuing this type of ad hoc syntax. */
2016 add_symbol_file_command (char *args
, int from_tty
)
2018 struct gdbarch
*gdbarch
= get_current_arch ();
2019 char *filename
= NULL
;
2020 int flags
= OBJF_USERLOADED
;
2022 int expecting_option
= 0;
2023 int section_index
= 0;
2027 int expecting_sec_name
= 0;
2028 int expecting_sec_addr
= 0;
2037 struct section_addr_info
*section_addrs
;
2038 struct sect_opt
*sect_opts
= NULL
;
2039 size_t num_sect_opts
= 0;
2040 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2043 sect_opts
= (struct sect_opt
*) xmalloc (num_sect_opts
2044 * sizeof (struct sect_opt
));
2049 error (_("add-symbol-file takes a file name and an address"));
2051 argv
= gdb_buildargv (args
);
2052 make_cleanup_freeargv (argv
);
2054 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2056 /* Process the argument. */
2059 /* The first argument is the file name. */
2060 filename
= tilde_expand (arg
);
2061 make_cleanup (xfree
, filename
);
2066 /* The second argument is always the text address at which
2067 to load the program. */
2068 sect_opts
[section_index
].name
= ".text";
2069 sect_opts
[section_index
].value
= arg
;
2070 if (++section_index
>= num_sect_opts
)
2073 sect_opts
= ((struct sect_opt
*)
2074 xrealloc (sect_opts
,
2076 * sizeof (struct sect_opt
)));
2081 /* It's an option (starting with '-') or it's an argument
2086 if (strcmp (arg
, "-readnow") == 0)
2087 flags
|= OBJF_READNOW
;
2088 else if (strcmp (arg
, "-s") == 0)
2090 expecting_sec_name
= 1;
2091 expecting_sec_addr
= 1;
2096 if (expecting_sec_name
)
2098 sect_opts
[section_index
].name
= arg
;
2099 expecting_sec_name
= 0;
2102 if (expecting_sec_addr
)
2104 sect_opts
[section_index
].value
= arg
;
2105 expecting_sec_addr
= 0;
2106 if (++section_index
>= num_sect_opts
)
2109 sect_opts
= ((struct sect_opt
*)
2110 xrealloc (sect_opts
,
2112 * sizeof (struct sect_opt
)));
2116 error (_("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*"));
2121 /* This command takes at least two arguments. The first one is a
2122 filename, and the second is the address where this file has been
2123 loaded. Abort now if this address hasn't been provided by the
2125 if (section_index
< 1)
2126 error (_("The address where %s has been loaded is missing"), filename
);
2128 /* Print the prompt for the query below. And save the arguments into
2129 a sect_addr_info structure to be passed around to other
2130 functions. We have to split this up into separate print
2131 statements because hex_string returns a local static
2134 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename
);
2135 section_addrs
= alloc_section_addr_info (section_index
);
2136 make_cleanup (xfree
, section_addrs
);
2137 for (i
= 0; i
< section_index
; i
++)
2140 char *val
= sect_opts
[i
].value
;
2141 char *sec
= sect_opts
[i
].name
;
2143 addr
= parse_and_eval_address (val
);
2145 /* Here we store the section offsets in the order they were
2146 entered on the command line. */
2147 section_addrs
->other
[sec_num
].name
= sec
;
2148 section_addrs
->other
[sec_num
].addr
= addr
;
2149 printf_unfiltered ("\t%s_addr = %s\n", sec
,
2150 paddress (gdbarch
, addr
));
2153 /* The object's sections are initialized when a
2154 call is made to build_objfile_section_table (objfile).
2155 This happens in reread_symbols.
2156 At this point, we don't know what file type this is,
2157 so we can't determine what section names are valid. */
2160 if (from_tty
&& (!query ("%s", "")))
2161 error (_("Not confirmed."));
2163 symbol_file_add (filename
, from_tty
? SYMFILE_VERBOSE
: 0,
2164 section_addrs
, flags
);
2166 /* Getting new symbols may change our opinion about what is
2168 reinit_frame_cache ();
2169 do_cleanups (my_cleanups
);
2173 /* Re-read symbols if a symbol-file has changed. */
2175 reread_symbols (void)
2177 struct objfile
*objfile
;
2180 struct stat new_statbuf
;
2183 /* With the addition of shared libraries, this should be modified,
2184 the load time should be saved in the partial symbol tables, since
2185 different tables may come from different source files. FIXME.
2186 This routine should then walk down each partial symbol table
2187 and see if the symbol table that it originates from has been changed */
2189 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2191 /* solib-sunos.c creates one objfile with obfd. */
2192 if (objfile
->obfd
== NULL
)
2195 /* Separate debug objfiles are handled in the main objfile. */
2196 if (objfile
->separate_debug_objfile_backlink
)
2199 #ifdef DEPRECATED_IBM6000_TARGET
2200 /* If this object is from a shared library, then you should
2201 stat on the library name, not member name. */
2203 if (objfile
->obfd
->my_archive
)
2204 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2207 res
= stat (objfile
->name
, &new_statbuf
);
2210 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2211 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2215 new_modtime
= new_statbuf
.st_mtime
;
2216 if (new_modtime
!= objfile
->mtime
)
2218 struct cleanup
*old_cleanups
;
2219 struct section_offsets
*offsets
;
2221 char *obfd_filename
;
2223 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2226 /* There are various functions like symbol_file_add,
2227 symfile_bfd_open, syms_from_objfile, etc., which might
2228 appear to do what we want. But they have various other
2229 effects which we *don't* want. So we just do stuff
2230 ourselves. We don't worry about mapped files (for one thing,
2231 any mapped file will be out of date). */
2233 /* If we get an error, blow away this objfile (not sure if
2234 that is the correct response for things like shared
2236 old_cleanups
= make_cleanup_free_objfile (objfile
);
2237 /* We need to do this whenever any symbols go away. */
2238 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2240 if (exec_bfd
!= NULL
&& strcmp (bfd_get_filename (objfile
->obfd
),
2241 bfd_get_filename (exec_bfd
)) == 0)
2243 /* Reload EXEC_BFD without asking anything. */
2245 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2248 /* Clean up any state BFD has sitting around. We don't need
2249 to close the descriptor but BFD lacks a way of closing the
2250 BFD without closing the descriptor. */
2251 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2252 if (!bfd_close (objfile
->obfd
))
2253 error (_("Can't close BFD for %s: %s"), objfile
->name
,
2254 bfd_errmsg (bfd_get_error ()));
2255 objfile
->obfd
= bfd_open_maybe_remote (obfd_filename
);
2256 if (objfile
->obfd
== NULL
)
2257 error (_("Can't open %s to read symbols."), objfile
->name
);
2259 objfile
->obfd
= gdb_bfd_ref (objfile
->obfd
);
2260 /* bfd_openr sets cacheable to true, which is what we want. */
2261 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2262 error (_("Can't read symbols from %s: %s."), objfile
->name
,
2263 bfd_errmsg (bfd_get_error ()));
2265 /* Save the offsets, we will nuke them with the rest of the
2267 num_offsets
= objfile
->num_sections
;
2268 offsets
= ((struct section_offsets
*)
2269 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2270 memcpy (offsets
, objfile
->section_offsets
,
2271 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2273 /* Remove any references to this objfile in the global
2275 preserve_values (objfile
);
2277 /* Nuke all the state that we will re-read. Much of the following
2278 code which sets things to NULL really is necessary to tell
2279 other parts of GDB that there is nothing currently there.
2281 Try to keep the freeing order compatible with free_objfile. */
2283 if (objfile
->sf
!= NULL
)
2285 (*objfile
->sf
->sym_finish
) (objfile
);
2288 clear_objfile_data (objfile
);
2290 /* Free the separate debug objfiles. It will be
2291 automatically recreated by sym_read. */
2292 free_objfile_separate_debug (objfile
);
2294 /* FIXME: Do we have to free a whole linked list, or is this
2296 if (objfile
->global_psymbols
.list
)
2297 xfree (objfile
->global_psymbols
.list
);
2298 memset (&objfile
->global_psymbols
, 0,
2299 sizeof (objfile
->global_psymbols
));
2300 if (objfile
->static_psymbols
.list
)
2301 xfree (objfile
->static_psymbols
.list
);
2302 memset (&objfile
->static_psymbols
, 0,
2303 sizeof (objfile
->static_psymbols
));
2305 /* Free the obstacks for non-reusable objfiles */
2306 bcache_xfree (objfile
->psymbol_cache
);
2307 objfile
->psymbol_cache
= bcache_xmalloc ();
2308 bcache_xfree (objfile
->macro_cache
);
2309 objfile
->macro_cache
= bcache_xmalloc ();
2310 bcache_xfree (objfile
->filename_cache
);
2311 objfile
->filename_cache
= bcache_xmalloc ();
2312 if (objfile
->demangled_names_hash
!= NULL
)
2314 htab_delete (objfile
->demangled_names_hash
);
2315 objfile
->demangled_names_hash
= NULL
;
2317 obstack_free (&objfile
->objfile_obstack
, 0);
2318 objfile
->sections
= NULL
;
2319 objfile
->symtabs
= NULL
;
2320 objfile
->psymtabs
= NULL
;
2321 objfile
->psymtabs_addrmap
= NULL
;
2322 objfile
->free_psymtabs
= NULL
;
2323 objfile
->cp_namespace_symtab
= NULL
;
2324 objfile
->msymbols
= NULL
;
2325 objfile
->deprecated_sym_private
= NULL
;
2326 objfile
->minimal_symbol_count
= 0;
2327 memset (&objfile
->msymbol_hash
, 0,
2328 sizeof (objfile
->msymbol_hash
));
2329 memset (&objfile
->msymbol_demangled_hash
, 0,
2330 sizeof (objfile
->msymbol_demangled_hash
));
2332 objfile
->psymbol_cache
= bcache_xmalloc ();
2333 objfile
->macro_cache
= bcache_xmalloc ();
2334 objfile
->filename_cache
= bcache_xmalloc ();
2335 /* obstack_init also initializes the obstack so it is
2336 empty. We could use obstack_specify_allocation but
2337 gdb_obstack.h specifies the alloc/dealloc
2339 obstack_init (&objfile
->objfile_obstack
);
2340 if (build_objfile_section_table (objfile
))
2342 error (_("Can't find the file sections in `%s': %s"),
2343 objfile
->name
, bfd_errmsg (bfd_get_error ()));
2345 terminate_minimal_symbol_table (objfile
);
2347 /* We use the same section offsets as from last time. I'm not
2348 sure whether that is always correct for shared libraries. */
2349 objfile
->section_offsets
= (struct section_offsets
*)
2350 obstack_alloc (&objfile
->objfile_obstack
,
2351 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2352 memcpy (objfile
->section_offsets
, offsets
,
2353 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2354 objfile
->num_sections
= num_offsets
;
2356 /* What the hell is sym_new_init for, anyway? The concept of
2357 distinguishing between the main file and additional files
2358 in this way seems rather dubious. */
2359 if (objfile
== symfile_objfile
)
2361 (*objfile
->sf
->sym_new_init
) (objfile
);
2364 (*objfile
->sf
->sym_init
) (objfile
);
2365 clear_complaints (&symfile_complaints
, 1, 1);
2366 /* Do not set flags as this is safe and we don't want to be
2368 (*objfile
->sf
->sym_read
) (objfile
, 0);
2369 if (!objfile_has_symbols (objfile
))
2372 printf_unfiltered (_("(no debugging symbols found)\n"));
2376 /* We're done reading the symbol file; finish off complaints. */
2377 clear_complaints (&symfile_complaints
, 0, 1);
2379 /* Getting new symbols may change our opinion about what is
2382 reinit_frame_cache ();
2384 /* Discard cleanups as symbol reading was successful. */
2385 discard_cleanups (old_cleanups
);
2387 /* If the mtime has changed between the time we set new_modtime
2388 and now, we *want* this to be out of date, so don't call stat
2390 objfile
->mtime
= new_modtime
;
2392 init_entry_point_info (objfile
);
2398 /* Notify objfiles that we've modified objfile sections. */
2399 objfiles_changed ();
2401 clear_symtab_users ();
2402 /* At least one objfile has changed, so we can consider that
2403 the executable we're debugging has changed too. */
2404 observer_notify_executable_changed ();
2417 static filename_language
*filename_language_table
;
2418 static int fl_table_size
, fl_table_next
;
2421 add_filename_language (char *ext
, enum language lang
)
2423 if (fl_table_next
>= fl_table_size
)
2425 fl_table_size
+= 10;
2426 filename_language_table
=
2427 xrealloc (filename_language_table
,
2428 fl_table_size
* sizeof (*filename_language_table
));
2431 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2432 filename_language_table
[fl_table_next
].lang
= lang
;
2436 static char *ext_args
;
2438 show_ext_args (struct ui_file
*file
, int from_tty
,
2439 struct cmd_list_element
*c
, const char *value
)
2441 fprintf_filtered (file
, _("\
2442 Mapping between filename extension and source language is \"%s\".\n"),
2447 set_ext_lang_command (char *args
, int from_tty
, struct cmd_list_element
*e
)
2450 char *cp
= ext_args
;
2453 /* First arg is filename extension, starting with '.' */
2455 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2457 /* Find end of first arg. */
2458 while (*cp
&& !isspace (*cp
))
2462 error (_("'%s': two arguments required -- filename extension and language"),
2465 /* Null-terminate first arg */
2468 /* Find beginning of second arg, which should be a source language. */
2469 while (*cp
&& isspace (*cp
))
2473 error (_("'%s': two arguments required -- filename extension and language"),
2476 /* Lookup the language from among those we know. */
2477 lang
= language_enum (cp
);
2479 /* Now lookup the filename extension: do we already know it? */
2480 for (i
= 0; i
< fl_table_next
; i
++)
2481 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2484 if (i
>= fl_table_next
)
2486 /* new file extension */
2487 add_filename_language (ext_args
, lang
);
2491 /* redefining a previously known filename extension */
2494 /* query ("Really make files of type %s '%s'?", */
2495 /* ext_args, language_str (lang)); */
2497 xfree (filename_language_table
[i
].ext
);
2498 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2499 filename_language_table
[i
].lang
= lang
;
2504 info_ext_lang_command (char *args
, int from_tty
)
2508 printf_filtered (_("Filename extensions and the languages they represent:"));
2509 printf_filtered ("\n\n");
2510 for (i
= 0; i
< fl_table_next
; i
++)
2511 printf_filtered ("\t%s\t- %s\n",
2512 filename_language_table
[i
].ext
,
2513 language_str (filename_language_table
[i
].lang
));
2517 init_filename_language_table (void)
2519 if (fl_table_size
== 0) /* protect against repetition */
2523 filename_language_table
=
2524 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
2525 add_filename_language (".c", language_c
);
2526 add_filename_language (".C", language_cplus
);
2527 add_filename_language (".cc", language_cplus
);
2528 add_filename_language (".cp", language_cplus
);
2529 add_filename_language (".cpp", language_cplus
);
2530 add_filename_language (".cxx", language_cplus
);
2531 add_filename_language (".c++", language_cplus
);
2532 add_filename_language (".java", language_java
);
2533 add_filename_language (".class", language_java
);
2534 add_filename_language (".m", language_objc
);
2535 add_filename_language (".f", language_fortran
);
2536 add_filename_language (".F", language_fortran
);
2537 add_filename_language (".s", language_asm
);
2538 add_filename_language (".sx", language_asm
);
2539 add_filename_language (".S", language_asm
);
2540 add_filename_language (".pas", language_pascal
);
2541 add_filename_language (".p", language_pascal
);
2542 add_filename_language (".pp", language_pascal
);
2543 add_filename_language (".adb", language_ada
);
2544 add_filename_language (".ads", language_ada
);
2545 add_filename_language (".a", language_ada
);
2546 add_filename_language (".ada", language_ada
);
2551 deduce_language_from_filename (char *filename
)
2556 if (filename
!= NULL
)
2557 if ((cp
= strrchr (filename
, '.')) != NULL
)
2558 for (i
= 0; i
< fl_table_next
; i
++)
2559 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2560 return filename_language_table
[i
].lang
;
2562 return language_unknown
;
2567 Allocate and partly initialize a new symbol table. Return a pointer
2568 to it. error() if no space.
2570 Caller must set these fields:
2579 allocate_symtab (char *filename
, struct objfile
*objfile
)
2581 struct symtab
*symtab
;
2583 symtab
= (struct symtab
*)
2584 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symtab
));
2585 memset (symtab
, 0, sizeof (*symtab
));
2586 symtab
->filename
= (char *) bcache (filename
, strlen (filename
) + 1,
2587 objfile
->filename_cache
);
2588 symtab
->fullname
= NULL
;
2589 symtab
->language
= deduce_language_from_filename (filename
);
2590 symtab
->debugformat
= "unknown";
2592 /* Hook it to the objfile it comes from */
2594 symtab
->objfile
= objfile
;
2595 symtab
->next
= objfile
->symtabs
;
2596 objfile
->symtabs
= symtab
;
2601 struct partial_symtab
*
2602 allocate_psymtab (const char *filename
, struct objfile
*objfile
)
2604 struct partial_symtab
*psymtab
;
2606 if (objfile
->free_psymtabs
)
2608 psymtab
= objfile
->free_psymtabs
;
2609 objfile
->free_psymtabs
= psymtab
->next
;
2612 psymtab
= (struct partial_symtab
*)
2613 obstack_alloc (&objfile
->objfile_obstack
,
2614 sizeof (struct partial_symtab
));
2616 memset (psymtab
, 0, sizeof (struct partial_symtab
));
2617 psymtab
->filename
= (char *) bcache (filename
, strlen (filename
) + 1,
2618 objfile
->filename_cache
);
2619 psymtab
->symtab
= NULL
;
2621 /* Prepend it to the psymtab list for the objfile it belongs to.
2622 Psymtabs are searched in most recent inserted -> least recent
2625 psymtab
->objfile
= objfile
;
2626 psymtab
->next
= objfile
->psymtabs
;
2627 objfile
->psymtabs
= psymtab
;
2630 struct partial_symtab
**prev_pst
;
2631 psymtab
->objfile
= objfile
;
2632 psymtab
->next
= NULL
;
2633 prev_pst
= &(objfile
->psymtabs
);
2634 while ((*prev_pst
) != NULL
)
2635 prev_pst
= &((*prev_pst
)->next
);
2636 (*prev_pst
) = psymtab
;
2644 discard_psymtab (struct partial_symtab
*pst
)
2646 struct partial_symtab
**prev_pst
;
2649 Empty psymtabs happen as a result of header files which don't
2650 have any symbols in them. There can be a lot of them. But this
2651 check is wrong, in that a psymtab with N_SLINE entries but
2652 nothing else is not empty, but we don't realize that. Fixing
2653 that without slowing things down might be tricky. */
2655 /* First, snip it out of the psymtab chain */
2657 prev_pst
= &(pst
->objfile
->psymtabs
);
2658 while ((*prev_pst
) != pst
)
2659 prev_pst
= &((*prev_pst
)->next
);
2660 (*prev_pst
) = pst
->next
;
2662 /* Next, put it on a free list for recycling */
2664 pst
->next
= pst
->objfile
->free_psymtabs
;
2665 pst
->objfile
->free_psymtabs
= pst
;
2669 /* Reset all data structures in gdb which may contain references to symbol
2673 clear_symtab_users (void)
2675 /* Someday, we should do better than this, by only blowing away
2676 the things that really need to be blown. */
2678 /* Clear the "current" symtab first, because it is no longer valid.
2679 breakpoint_re_set may try to access the current symtab. */
2680 clear_current_source_symtab_and_line ();
2683 breakpoint_re_set ();
2684 set_default_breakpoint (0, NULL
, 0, 0, 0);
2685 clear_pc_function_cache ();
2686 observer_notify_new_objfile (NULL
);
2688 /* Clear globals which might have pointed into a removed objfile.
2689 FIXME: It's not clear which of these are supposed to persist
2690 between expressions and which ought to be reset each time. */
2691 expression_context_block
= NULL
;
2692 innermost_block
= NULL
;
2694 /* Varobj may refer to old symbols, perform a cleanup. */
2695 varobj_invalidate ();
2700 clear_symtab_users_cleanup (void *ignore
)
2702 clear_symtab_users ();
2705 /* Allocate and partially fill a partial symtab. It will be
2706 completely filled at the end of the symbol list.
2708 FILENAME is the name of the symbol-file we are reading from. */
2710 struct partial_symtab
*
2711 start_psymtab_common (struct objfile
*objfile
,
2712 struct section_offsets
*section_offsets
,
2713 const char *filename
,
2714 CORE_ADDR textlow
, struct partial_symbol
**global_syms
,
2715 struct partial_symbol
**static_syms
)
2717 struct partial_symtab
*psymtab
;
2719 psymtab
= allocate_psymtab (filename
, objfile
);
2720 psymtab
->section_offsets
= section_offsets
;
2721 psymtab
->textlow
= textlow
;
2722 psymtab
->texthigh
= psymtab
->textlow
; /* default */
2723 psymtab
->globals_offset
= global_syms
- objfile
->global_psymbols
.list
;
2724 psymtab
->statics_offset
= static_syms
- objfile
->static_psymbols
.list
;
2728 /* Helper function, initialises partial symbol structure and stashes
2729 it into objfile's bcache. Note that our caching mechanism will
2730 use all fields of struct partial_symbol to determine hash value of the
2731 structure. In other words, having two symbols with the same name but
2732 different domain (or address) is possible and correct. */
2734 static const struct partial_symbol
*
2735 add_psymbol_to_bcache (char *name
, int namelength
, int copy_name
,
2737 enum address_class
class,
2738 long val
, /* Value as a long */
2739 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2740 enum language language
, struct objfile
*objfile
,
2743 /* psymbol is static so that there will be no uninitialized gaps in the
2744 structure which might contain random data, causing cache misses in
2746 static struct partial_symbol psymbol
;
2748 /* However, we must ensure that the entire 'value' field has been
2749 zeroed before assigning to it, because an assignment may not
2750 write the entire field. */
2751 memset (&psymbol
.ginfo
.value
, 0, sizeof (psymbol
.ginfo
.value
));
2752 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2755 SYMBOL_VALUE (&psymbol
) = val
;
2759 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2761 SYMBOL_SECTION (&psymbol
) = 0;
2762 SYMBOL_LANGUAGE (&psymbol
) = language
;
2763 PSYMBOL_DOMAIN (&psymbol
) = domain
;
2764 PSYMBOL_CLASS (&psymbol
) = class;
2766 SYMBOL_SET_NAMES (&psymbol
, name
, namelength
, copy_name
, objfile
);
2768 /* Stash the partial symbol away in the cache */
2769 return bcache_full (&psymbol
, sizeof (struct partial_symbol
),
2770 objfile
->psymbol_cache
, added
);
2773 /* Helper function, adds partial symbol to the given partial symbol
2777 append_psymbol_to_list (struct psymbol_allocation_list
*list
,
2778 const struct partial_symbol
*psym
,
2779 struct objfile
*objfile
)
2781 if (list
->next
>= list
->list
+ list
->size
)
2782 extend_psymbol_list (list
, objfile
);
2783 *list
->next
++ = (struct partial_symbol
*) psym
;
2784 OBJSTAT (objfile
, n_psyms
++);
2787 /* Add a symbol with a long value to a psymtab.
2788 Since one arg is a struct, we pass in a ptr and deref it (sigh).
2789 Return the partial symbol that has been added. */
2791 /* NOTE: carlton/2003-09-11: The reason why we return the partial
2792 symbol is so that callers can get access to the symbol's demangled
2793 name, which they don't have any cheap way to determine otherwise.
2794 (Currenly, dwarf2read.c is the only file who uses that information,
2795 though it's possible that other readers might in the future.)
2796 Elena wasn't thrilled about that, and I don't blame her, but we
2797 couldn't come up with a better way to get that information. If
2798 it's needed in other situations, we could consider breaking up
2799 SYMBOL_SET_NAMES to provide access to the demangled name lookup
2802 const struct partial_symbol
*
2803 add_psymbol_to_list (char *name
, int namelength
, int copy_name
,
2805 enum address_class
class,
2806 struct psymbol_allocation_list
*list
,
2807 long val
, /* Value as a long */
2808 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2809 enum language language
, struct objfile
*objfile
)
2811 const struct partial_symbol
*psym
;
2815 /* Stash the partial symbol away in the cache */
2816 psym
= add_psymbol_to_bcache (name
, namelength
, copy_name
, domain
, class,
2817 val
, coreaddr
, language
, objfile
, &added
);
2819 /* Do not duplicate global partial symbols. */
2820 if (list
== &objfile
->global_psymbols
2824 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2825 append_psymbol_to_list (list
, psym
, objfile
);
2829 /* Initialize storage for partial symbols. */
2832 init_psymbol_list (struct objfile
*objfile
, int total_symbols
)
2834 /* Free any previously allocated psymbol lists. */
2836 if (objfile
->global_psymbols
.list
)
2838 xfree (objfile
->global_psymbols
.list
);
2840 if (objfile
->static_psymbols
.list
)
2842 xfree (objfile
->static_psymbols
.list
);
2845 /* Current best guess is that approximately a twentieth
2846 of the total symbols (in a debugging file) are global or static
2849 objfile
->global_psymbols
.size
= total_symbols
/ 10;
2850 objfile
->static_psymbols
.size
= total_symbols
/ 10;
2852 if (objfile
->global_psymbols
.size
> 0)
2854 objfile
->global_psymbols
.next
=
2855 objfile
->global_psymbols
.list
= (struct partial_symbol
**)
2856 xmalloc ((objfile
->global_psymbols
.size
2857 * sizeof (struct partial_symbol
*)));
2859 if (objfile
->static_psymbols
.size
> 0)
2861 objfile
->static_psymbols
.next
=
2862 objfile
->static_psymbols
.list
= (struct partial_symbol
**)
2863 xmalloc ((objfile
->static_psymbols
.size
2864 * sizeof (struct partial_symbol
*)));
2869 The following code implements an abstraction for debugging overlay sections.
2871 The target model is as follows:
2872 1) The gnu linker will permit multiple sections to be mapped into the
2873 same VMA, each with its own unique LMA (or load address).
2874 2) It is assumed that some runtime mechanism exists for mapping the
2875 sections, one by one, from the load address into the VMA address.
2876 3) This code provides a mechanism for gdb to keep track of which
2877 sections should be considered to be mapped from the VMA to the LMA.
2878 This information is used for symbol lookup, and memory read/write.
2879 For instance, if a section has been mapped then its contents
2880 should be read from the VMA, otherwise from the LMA.
2882 Two levels of debugger support for overlays are available. One is
2883 "manual", in which the debugger relies on the user to tell it which
2884 overlays are currently mapped. This level of support is
2885 implemented entirely in the core debugger, and the information about
2886 whether a section is mapped is kept in the objfile->obj_section table.
2888 The second level of support is "automatic", and is only available if
2889 the target-specific code provides functionality to read the target's
2890 overlay mapping table, and translate its contents for the debugger
2891 (by updating the mapped state information in the obj_section tables).
2893 The interface is as follows:
2895 overlay map <name> -- tell gdb to consider this section mapped
2896 overlay unmap <name> -- tell gdb to consider this section unmapped
2897 overlay list -- list the sections that GDB thinks are mapped
2898 overlay read-target -- get the target's state of what's mapped
2899 overlay off/manual/auto -- set overlay debugging state
2900 Functional interface:
2901 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2902 section, return that section.
2903 find_pc_overlay(pc): find any overlay section that contains
2904 the pc, either in its VMA or its LMA
2905 section_is_mapped(sect): true if overlay is marked as mapped
2906 section_is_overlay(sect): true if section's VMA != LMA
2907 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2908 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2909 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2910 overlay_mapped_address(...): map an address from section's LMA to VMA
2911 overlay_unmapped_address(...): map an address from section's VMA to LMA
2912 symbol_overlayed_address(...): Return a "current" address for symbol:
2913 either in VMA or LMA depending on whether
2914 the symbol's section is currently mapped
2917 /* Overlay debugging state: */
2919 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2920 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
2922 /* Function: section_is_overlay (SECTION)
2923 Returns true if SECTION has VMA not equal to LMA, ie.
2924 SECTION is loaded at an address different from where it will "run". */
2927 section_is_overlay (struct obj_section
*section
)
2929 if (overlay_debugging
&& section
)
2931 bfd
*abfd
= section
->objfile
->obfd
;
2932 asection
*bfd_section
= section
->the_bfd_section
;
2934 if (bfd_section_lma (abfd
, bfd_section
) != 0
2935 && bfd_section_lma (abfd
, bfd_section
)
2936 != bfd_section_vma (abfd
, bfd_section
))
2943 /* Function: overlay_invalidate_all (void)
2944 Invalidate the mapped state of all overlay sections (mark it as stale). */
2947 overlay_invalidate_all (void)
2949 struct objfile
*objfile
;
2950 struct obj_section
*sect
;
2952 ALL_OBJSECTIONS (objfile
, sect
)
2953 if (section_is_overlay (sect
))
2954 sect
->ovly_mapped
= -1;
2957 /* Function: section_is_mapped (SECTION)
2958 Returns true if section is an overlay, and is currently mapped.
2960 Access to the ovly_mapped flag is restricted to this function, so
2961 that we can do automatic update. If the global flag
2962 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2963 overlay_invalidate_all. If the mapped state of the particular
2964 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2967 section_is_mapped (struct obj_section
*osect
)
2969 struct gdbarch
*gdbarch
;
2971 if (osect
== 0 || !section_is_overlay (osect
))
2974 switch (overlay_debugging
)
2978 return 0; /* overlay debugging off */
2979 case ovly_auto
: /* overlay debugging automatic */
2980 /* Unles there is a gdbarch_overlay_update function,
2981 there's really nothing useful to do here (can't really go auto) */
2982 gdbarch
= get_objfile_arch (osect
->objfile
);
2983 if (gdbarch_overlay_update_p (gdbarch
))
2985 if (overlay_cache_invalid
)
2987 overlay_invalidate_all ();
2988 overlay_cache_invalid
= 0;
2990 if (osect
->ovly_mapped
== -1)
2991 gdbarch_overlay_update (gdbarch
, osect
);
2993 /* fall thru to manual case */
2994 case ovly_on
: /* overlay debugging manual */
2995 return osect
->ovly_mapped
== 1;
2999 /* Function: pc_in_unmapped_range
3000 If PC falls into the lma range of SECTION, return true, else false. */
3003 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3005 if (section_is_overlay (section
))
3007 bfd
*abfd
= section
->objfile
->obfd
;
3008 asection
*bfd_section
= section
->the_bfd_section
;
3010 /* We assume the LMA is relocated by the same offset as the VMA. */
3011 bfd_vma size
= bfd_get_section_size (bfd_section
);
3012 CORE_ADDR offset
= obj_section_offset (section
);
3014 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
3015 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
3022 /* Function: pc_in_mapped_range
3023 If PC falls into the vma range of SECTION, return true, else false. */
3026 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3028 if (section_is_overlay (section
))
3030 if (obj_section_addr (section
) <= pc
3031 && pc
< obj_section_endaddr (section
))
3039 /* Return true if the mapped ranges of sections A and B overlap, false
3042 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
3044 CORE_ADDR a_start
= obj_section_addr (a
);
3045 CORE_ADDR a_end
= obj_section_endaddr (a
);
3046 CORE_ADDR b_start
= obj_section_addr (b
);
3047 CORE_ADDR b_end
= obj_section_endaddr (b
);
3049 return (a_start
< b_end
&& b_start
< a_end
);
3052 /* Function: overlay_unmapped_address (PC, SECTION)
3053 Returns the address corresponding to PC in the unmapped (load) range.
3054 May be the same as PC. */
3057 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3059 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
3061 bfd
*abfd
= section
->objfile
->obfd
;
3062 asection
*bfd_section
= section
->the_bfd_section
;
3064 return pc
+ bfd_section_lma (abfd
, bfd_section
)
3065 - bfd_section_vma (abfd
, bfd_section
);
3071 /* Function: overlay_mapped_address (PC, SECTION)
3072 Returns the address corresponding to PC in the mapped (runtime) range.
3073 May be the same as PC. */
3076 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3078 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3080 bfd
*abfd
= section
->objfile
->obfd
;
3081 asection
*bfd_section
= section
->the_bfd_section
;
3083 return pc
+ bfd_section_vma (abfd
, bfd_section
)
3084 - bfd_section_lma (abfd
, bfd_section
);
3091 /* Function: symbol_overlayed_address
3092 Return one of two addresses (relative to the VMA or to the LMA),
3093 depending on whether the section is mapped or not. */
3096 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3098 if (overlay_debugging
)
3100 /* If the symbol has no section, just return its regular address. */
3103 /* If the symbol's section is not an overlay, just return its address */
3104 if (!section_is_overlay (section
))
3106 /* If the symbol's section is mapped, just return its address */
3107 if (section_is_mapped (section
))
3110 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3111 * then return its LOADED address rather than its vma address!!
3113 return overlay_unmapped_address (address
, section
);
3118 /* Function: find_pc_overlay (PC)
3119 Return the best-match overlay section for PC:
3120 If PC matches a mapped overlay section's VMA, return that section.
3121 Else if PC matches an unmapped section's VMA, return that section.
3122 Else if PC matches an unmapped section's LMA, return that section. */
3124 struct obj_section
*
3125 find_pc_overlay (CORE_ADDR pc
)
3127 struct objfile
*objfile
;
3128 struct obj_section
*osect
, *best_match
= NULL
;
3130 if (overlay_debugging
)
3131 ALL_OBJSECTIONS (objfile
, osect
)
3132 if (section_is_overlay (osect
))
3134 if (pc_in_mapped_range (pc
, osect
))
3136 if (section_is_mapped (osect
))
3141 else if (pc_in_unmapped_range (pc
, osect
))
3147 /* Function: find_pc_mapped_section (PC)
3148 If PC falls into the VMA address range of an overlay section that is
3149 currently marked as MAPPED, return that section. Else return NULL. */
3151 struct obj_section
*
3152 find_pc_mapped_section (CORE_ADDR pc
)
3154 struct objfile
*objfile
;
3155 struct obj_section
*osect
;
3157 if (overlay_debugging
)
3158 ALL_OBJSECTIONS (objfile
, osect
)
3159 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3165 /* Function: list_overlays_command
3166 Print a list of mapped sections and their PC ranges */
3169 list_overlays_command (char *args
, int from_tty
)
3172 struct objfile
*objfile
;
3173 struct obj_section
*osect
;
3175 if (overlay_debugging
)
3176 ALL_OBJSECTIONS (objfile
, osect
)
3177 if (section_is_mapped (osect
))
3179 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3184 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3185 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3186 size
= bfd_get_section_size (osect
->the_bfd_section
);
3187 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3189 printf_filtered ("Section %s, loaded at ", name
);
3190 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3191 puts_filtered (" - ");
3192 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3193 printf_filtered (", mapped at ");
3194 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3195 puts_filtered (" - ");
3196 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3197 puts_filtered ("\n");
3202 printf_filtered (_("No sections are mapped.\n"));
3205 /* Function: map_overlay_command
3206 Mark the named section as mapped (ie. residing at its VMA address). */
3209 map_overlay_command (char *args
, int from_tty
)
3211 struct objfile
*objfile
, *objfile2
;
3212 struct obj_section
*sec
, *sec2
;
3214 if (!overlay_debugging
)
3216 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3217 the 'overlay manual' command."));
3219 if (args
== 0 || *args
== 0)
3220 error (_("Argument required: name of an overlay section"));
3222 /* First, find a section matching the user supplied argument */
3223 ALL_OBJSECTIONS (objfile
, sec
)
3224 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3226 /* Now, check to see if the section is an overlay. */
3227 if (!section_is_overlay (sec
))
3228 continue; /* not an overlay section */
3230 /* Mark the overlay as "mapped" */
3231 sec
->ovly_mapped
= 1;
3233 /* Next, make a pass and unmap any sections that are
3234 overlapped by this new section: */
3235 ALL_OBJSECTIONS (objfile2
, sec2
)
3236 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
, sec2
))
3239 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3240 bfd_section_name (objfile
->obfd
,
3241 sec2
->the_bfd_section
));
3242 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
3246 error (_("No overlay section called %s"), args
);
3249 /* Function: unmap_overlay_command
3250 Mark the overlay section as unmapped
3251 (ie. resident in its LMA address range, rather than the VMA range). */
3254 unmap_overlay_command (char *args
, int from_tty
)
3256 struct objfile
*objfile
;
3257 struct obj_section
*sec
;
3259 if (!overlay_debugging
)
3261 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3262 the 'overlay manual' command."));
3264 if (args
== 0 || *args
== 0)
3265 error (_("Argument required: name of an overlay section"));
3267 /* First, find a section matching the user supplied argument */
3268 ALL_OBJSECTIONS (objfile
, sec
)
3269 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3271 if (!sec
->ovly_mapped
)
3272 error (_("Section %s is not mapped"), args
);
3273 sec
->ovly_mapped
= 0;
3276 error (_("No overlay section called %s"), args
);
3279 /* Function: overlay_auto_command
3280 A utility command to turn on overlay debugging.
3281 Possibly this should be done via a set/show command. */
3284 overlay_auto_command (char *args
, int from_tty
)
3286 overlay_debugging
= ovly_auto
;
3287 enable_overlay_breakpoints ();
3289 printf_unfiltered (_("Automatic overlay debugging enabled."));
3292 /* Function: overlay_manual_command
3293 A utility command to turn on overlay debugging.
3294 Possibly this should be done via a set/show command. */
3297 overlay_manual_command (char *args
, int from_tty
)
3299 overlay_debugging
= ovly_on
;
3300 disable_overlay_breakpoints ();
3302 printf_unfiltered (_("Overlay debugging enabled."));
3305 /* Function: overlay_off_command
3306 A utility command to turn on overlay debugging.
3307 Possibly this should be done via a set/show command. */
3310 overlay_off_command (char *args
, int from_tty
)
3312 overlay_debugging
= ovly_off
;
3313 disable_overlay_breakpoints ();
3315 printf_unfiltered (_("Overlay debugging disabled."));
3319 overlay_load_command (char *args
, int from_tty
)
3321 struct gdbarch
*gdbarch
= get_current_arch ();
3323 if (gdbarch_overlay_update_p (gdbarch
))
3324 gdbarch_overlay_update (gdbarch
, NULL
);
3326 error (_("This target does not know how to read its overlay state."));
3329 /* Function: overlay_command
3330 A place-holder for a mis-typed command */
3332 /* Command list chain containing all defined "overlay" subcommands. */
3333 struct cmd_list_element
*overlaylist
;
3336 overlay_command (char *args
, int from_tty
)
3339 ("\"overlay\" must be followed by the name of an overlay command.\n");
3340 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3344 /* Target Overlays for the "Simplest" overlay manager:
3346 This is GDB's default target overlay layer. It works with the
3347 minimal overlay manager supplied as an example by Cygnus. The
3348 entry point is via a function pointer "gdbarch_overlay_update",
3349 so targets that use a different runtime overlay manager can
3350 substitute their own overlay_update function and take over the
3353 The overlay_update function pokes around in the target's data structures
3354 to see what overlays are mapped, and updates GDB's overlay mapping with
3357 In this simple implementation, the target data structures are as follows:
3358 unsigned _novlys; /# number of overlay sections #/
3359 unsigned _ovly_table[_novlys][4] = {
3360 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3361 {..., ..., ..., ...},
3363 unsigned _novly_regions; /# number of overlay regions #/
3364 unsigned _ovly_region_table[_novly_regions][3] = {
3365 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3368 These functions will attempt to update GDB's mappedness state in the
3369 symbol section table, based on the target's mappedness state.
3371 To do this, we keep a cached copy of the target's _ovly_table, and
3372 attempt to detect when the cached copy is invalidated. The main
3373 entry point is "simple_overlay_update(SECT), which looks up SECT in
3374 the cached table and re-reads only the entry for that section from
3375 the target (whenever possible).
3378 /* Cached, dynamically allocated copies of the target data structures: */
3379 static unsigned (*cache_ovly_table
)[4] = 0;
3381 static unsigned (*cache_ovly_region_table
)[3] = 0;
3383 static unsigned cache_novlys
= 0;
3385 static unsigned cache_novly_regions
= 0;
3387 static CORE_ADDR cache_ovly_table_base
= 0;
3389 static CORE_ADDR cache_ovly_region_table_base
= 0;
3393 VMA
, SIZE
, LMA
, MAPPED
3396 /* Throw away the cached copy of _ovly_table */
3398 simple_free_overlay_table (void)
3400 if (cache_ovly_table
)
3401 xfree (cache_ovly_table
);
3403 cache_ovly_table
= NULL
;
3404 cache_ovly_table_base
= 0;
3408 /* Throw away the cached copy of _ovly_region_table */
3410 simple_free_overlay_region_table (void)
3412 if (cache_ovly_region_table
)
3413 xfree (cache_ovly_region_table
);
3414 cache_novly_regions
= 0;
3415 cache_ovly_region_table
= NULL
;
3416 cache_ovly_region_table_base
= 0;
3420 /* Read an array of ints of size SIZE from the target into a local buffer.
3421 Convert to host order. int LEN is number of ints */
3423 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3424 int len
, int size
, enum bfd_endian byte_order
)
3426 /* FIXME (alloca): Not safe if array is very large. */
3427 gdb_byte
*buf
= alloca (len
* size
);
3430 read_memory (memaddr
, buf
, len
* size
);
3431 for (i
= 0; i
< len
; i
++)
3432 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3435 /* Find and grab a copy of the target _ovly_table
3436 (and _novlys, which is needed for the table's size) */
3438 simple_read_overlay_table (void)
3440 struct minimal_symbol
*novlys_msym
, *ovly_table_msym
;
3441 struct gdbarch
*gdbarch
;
3443 enum bfd_endian byte_order
;
3445 simple_free_overlay_table ();
3446 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3449 error (_("Error reading inferior's overlay table: "
3450 "couldn't find `_novlys' variable\n"
3451 "in inferior. Use `overlay manual' mode."));
3455 ovly_table_msym
= lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3456 if (! ovly_table_msym
)
3458 error (_("Error reading inferior's overlay table: couldn't find "
3459 "`_ovly_table' array\n"
3460 "in inferior. Use `overlay manual' mode."));
3464 gdbarch
= get_objfile_arch (msymbol_objfile (ovly_table_msym
));
3465 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3466 byte_order
= gdbarch_byte_order (gdbarch
);
3468 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
),
3471 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3472 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3473 read_target_long_array (cache_ovly_table_base
,
3474 (unsigned int *) cache_ovly_table
,
3475 cache_novlys
* 4, word_size
, byte_order
);
3477 return 1; /* SUCCESS */
3481 /* Find and grab a copy of the target _ovly_region_table
3482 (and _novly_regions, which is needed for the table's size) */
3484 simple_read_overlay_region_table (void)
3486 struct minimal_symbol
*msym
;
3487 struct gdbarch
*gdbarch
;
3489 enum bfd_endian byte_order
;
3491 simple_free_overlay_region_table ();
3492 msym
= lookup_minimal_symbol ("_novly_regions", NULL
, NULL
);
3494 return 0; /* failure */
3496 gdbarch
= get_objfile_arch (msymbol_objfile (msym
));
3497 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3498 byte_order
= gdbarch_byte_order (gdbarch
);
3500 cache_novly_regions
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
),
3503 cache_ovly_region_table
= (void *) xmalloc (cache_novly_regions
* 12);
3504 if (cache_ovly_region_table
!= NULL
)
3506 msym
= lookup_minimal_symbol ("_ovly_region_table", NULL
, NULL
);
3509 cache_ovly_region_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3510 read_target_long_array (cache_ovly_region_table_base
,
3511 (unsigned int *) cache_ovly_region_table
,
3512 cache_novly_regions
* 3,
3513 word_size
, byte_order
);
3516 return 0; /* failure */
3519 return 0; /* failure */
3520 return 1; /* SUCCESS */
3524 /* Function: simple_overlay_update_1
3525 A helper function for simple_overlay_update. Assuming a cached copy
3526 of _ovly_table exists, look through it to find an entry whose vma,
3527 lma and size match those of OSECT. Re-read the entry and make sure
3528 it still matches OSECT (else the table may no longer be valid).
3529 Set OSECT's mapped state to match the entry. Return: 1 for
3530 success, 0 for failure. */
3533 simple_overlay_update_1 (struct obj_section
*osect
)
3536 bfd
*obfd
= osect
->objfile
->obfd
;
3537 asection
*bsect
= osect
->the_bfd_section
;
3538 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3539 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3540 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3542 size
= bfd_get_section_size (osect
->the_bfd_section
);
3543 for (i
= 0; i
< cache_novlys
; i
++)
3544 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3545 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3546 /* && cache_ovly_table[i][SIZE] == size */ )
3548 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3549 (unsigned int *) cache_ovly_table
[i
],
3550 4, word_size
, byte_order
);
3551 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3552 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3553 /* && cache_ovly_table[i][SIZE] == size */ )
3555 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3558 else /* Warning! Warning! Target's ovly table has changed! */
3564 /* Function: simple_overlay_update
3565 If OSECT is NULL, then update all sections' mapped state
3566 (after re-reading the entire target _ovly_table).
3567 If OSECT is non-NULL, then try to find a matching entry in the
3568 cached ovly_table and update only OSECT's mapped state.
3569 If a cached entry can't be found or the cache isn't valid, then
3570 re-read the entire cache, and go ahead and update all sections. */
3573 simple_overlay_update (struct obj_section
*osect
)
3575 struct objfile
*objfile
;
3577 /* Were we given an osect to look up? NULL means do all of them. */
3579 /* Have we got a cached copy of the target's overlay table? */
3580 if (cache_ovly_table
!= NULL
)
3581 /* Does its cached location match what's currently in the symtab? */
3582 if (cache_ovly_table_base
==
3583 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL
, NULL
)))
3584 /* Then go ahead and try to look up this single section in the cache */
3585 if (simple_overlay_update_1 (osect
))
3586 /* Found it! We're done. */
3589 /* Cached table no good: need to read the entire table anew.
3590 Or else we want all the sections, in which case it's actually
3591 more efficient to read the whole table in one block anyway. */
3593 if (! simple_read_overlay_table ())
3596 /* Now may as well update all sections, even if only one was requested. */
3597 ALL_OBJSECTIONS (objfile
, osect
)
3598 if (section_is_overlay (osect
))
3601 bfd
*obfd
= osect
->objfile
->obfd
;
3602 asection
*bsect
= osect
->the_bfd_section
;
3604 size
= bfd_get_section_size (bsect
);
3605 for (i
= 0; i
< cache_novlys
; i
++)
3606 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3607 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3608 /* && cache_ovly_table[i][SIZE] == size */ )
3609 { /* obj_section matches i'th entry in ovly_table */
3610 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3611 break; /* finished with inner for loop: break out */
3616 /* Set the output sections and output offsets for section SECTP in
3617 ABFD. The relocation code in BFD will read these offsets, so we
3618 need to be sure they're initialized. We map each section to itself,
3619 with no offset; this means that SECTP->vma will be honored. */
3622 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3624 sectp
->output_section
= sectp
;
3625 sectp
->output_offset
= 0;
3628 /* Default implementation for sym_relocate. */
3632 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3635 bfd
*abfd
= objfile
->obfd
;
3637 /* We're only interested in sections with relocation
3639 if ((sectp
->flags
& SEC_RELOC
) == 0)
3642 /* We will handle section offsets properly elsewhere, so relocate as if
3643 all sections begin at 0. */
3644 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3646 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3649 /* Relocate the contents of a debug section SECTP in ABFD. The
3650 contents are stored in BUF if it is non-NULL, or returned in a
3651 malloc'd buffer otherwise.
3653 For some platforms and debug info formats, shared libraries contain
3654 relocations against the debug sections (particularly for DWARF-2;
3655 one affected platform is PowerPC GNU/Linux, although it depends on
3656 the version of the linker in use). Also, ELF object files naturally
3657 have unresolved relocations for their debug sections. We need to apply
3658 the relocations in order to get the locations of symbols correct.
3659 Another example that may require relocation processing, is the
3660 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3664 symfile_relocate_debug_section (struct objfile
*objfile
,
3665 asection
*sectp
, bfd_byte
*buf
)
3667 gdb_assert (objfile
->sf
->sym_relocate
);
3669 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3672 struct symfile_segment_data
*
3673 get_symfile_segment_data (bfd
*abfd
)
3675 struct sym_fns
*sf
= find_sym_fns (abfd
);
3680 return sf
->sym_segments (abfd
);
3684 free_symfile_segment_data (struct symfile_segment_data
*data
)
3686 xfree (data
->segment_bases
);
3687 xfree (data
->segment_sizes
);
3688 xfree (data
->segment_info
);
3694 - DATA, containing segment addresses from the object file ABFD, and
3695 the mapping from ABFD's sections onto the segments that own them,
3697 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3698 segment addresses reported by the target,
3699 store the appropriate offsets for each section in OFFSETS.
3701 If there are fewer entries in SEGMENT_BASES than there are segments
3702 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3704 If there are more entries, then ignore the extra. The target may
3705 not be able to distinguish between an empty data segment and a
3706 missing data segment; a missing text segment is less plausible. */
3708 symfile_map_offsets_to_segments (bfd
*abfd
, struct symfile_segment_data
*data
,
3709 struct section_offsets
*offsets
,
3710 int num_segment_bases
,
3711 const CORE_ADDR
*segment_bases
)
3716 /* It doesn't make sense to call this function unless you have some
3717 segment base addresses. */
3718 gdb_assert (segment_bases
> 0);
3720 /* If we do not have segment mappings for the object file, we
3721 can not relocate it by segments. */
3722 gdb_assert (data
!= NULL
);
3723 gdb_assert (data
->num_segments
> 0);
3725 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3727 int which
= data
->segment_info
[i
];
3729 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
3731 /* Don't bother computing offsets for sections that aren't
3732 loaded as part of any segment. */
3736 /* Use the last SEGMENT_BASES entry as the address of any extra
3737 segments mentioned in DATA->segment_info. */
3738 if (which
> num_segment_bases
)
3739 which
= num_segment_bases
;
3741 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
3742 - data
->segment_bases
[which
- 1]);
3749 symfile_find_segment_sections (struct objfile
*objfile
)
3751 bfd
*abfd
= objfile
->obfd
;
3754 struct symfile_segment_data
*data
;
3756 data
= get_symfile_segment_data (objfile
->obfd
);
3760 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
3762 free_symfile_segment_data (data
);
3766 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3769 int which
= data
->segment_info
[i
];
3773 if (objfile
->sect_index_text
== -1)
3774 objfile
->sect_index_text
= sect
->index
;
3776 if (objfile
->sect_index_rodata
== -1)
3777 objfile
->sect_index_rodata
= sect
->index
;
3779 else if (which
== 2)
3781 if (objfile
->sect_index_data
== -1)
3782 objfile
->sect_index_data
= sect
->index
;
3784 if (objfile
->sect_index_bss
== -1)
3785 objfile
->sect_index_bss
= sect
->index
;
3789 free_symfile_segment_data (data
);
3793 _initialize_symfile (void)
3795 struct cmd_list_element
*c
;
3797 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3798 Load symbol table from executable file FILE.\n\
3799 The `file' command can also load symbol tables, as well as setting the file\n\
3800 to execute."), &cmdlist
);
3801 set_cmd_completer (c
, filename_completer
);
3803 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3804 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3805 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3806 ADDR is the starting address of the file's text.\n\
3807 The optional arguments are section-name section-address pairs and\n\
3808 should be specified if the data and bss segments are not contiguous\n\
3809 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3811 set_cmd_completer (c
, filename_completer
);
3813 c
= add_cmd ("load", class_files
, load_command
, _("\
3814 Dynamically load FILE into the running program, and record its symbols\n\
3815 for access from GDB.\n\
3816 A load OFFSET may also be given."), &cmdlist
);
3817 set_cmd_completer (c
, filename_completer
);
3819 add_setshow_boolean_cmd ("symbol-reloading", class_support
,
3820 &symbol_reloading
, _("\
3821 Set dynamic symbol table reloading multiple times in one run."), _("\
3822 Show dynamic symbol table reloading multiple times in one run."), NULL
,
3824 show_symbol_reloading
,
3825 &setlist
, &showlist
);
3827 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3828 _("Commands for debugging overlays."), &overlaylist
,
3829 "overlay ", 0, &cmdlist
);
3831 add_com_alias ("ovly", "overlay", class_alias
, 1);
3832 add_com_alias ("ov", "overlay", class_alias
, 1);
3834 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3835 _("Assert that an overlay section is mapped."), &overlaylist
);
3837 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3838 _("Assert that an overlay section is unmapped."), &overlaylist
);
3840 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3841 _("List mappings of overlay sections."), &overlaylist
);
3843 add_cmd ("manual", class_support
, overlay_manual_command
,
3844 _("Enable overlay debugging."), &overlaylist
);
3845 add_cmd ("off", class_support
, overlay_off_command
,
3846 _("Disable overlay debugging."), &overlaylist
);
3847 add_cmd ("auto", class_support
, overlay_auto_command
,
3848 _("Enable automatic overlay debugging."), &overlaylist
);
3849 add_cmd ("load-target", class_support
, overlay_load_command
,
3850 _("Read the overlay mapping state from the target."), &overlaylist
);
3852 /* Filename extension to source language lookup table: */
3853 init_filename_language_table ();
3854 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3856 Set mapping between filename extension and source language."), _("\
3857 Show mapping between filename extension and source language."), _("\
3858 Usage: set extension-language .foo bar"),
3859 set_ext_lang_command
,
3861 &setlist
, &showlist
);
3863 add_info ("extensions", info_ext_lang_command
,
3864 _("All filename extensions associated with a source language."));
3866 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3867 &debug_file_directory
, _("\
3868 Set the directories where separate debug symbols are searched for."), _("\
3869 Show the directories where separate debug symbols are searched for."), _("\
3870 Separate debug symbols are first searched for in the same\n\
3871 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3872 and lastly at the path of the directory of the binary with\n\
3873 each global debug-file-directory component prepended."),
3875 show_debug_file_directory
,
3876 &setlist
, &showlist
);