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"
70 int (*deprecated_ui_load_progress_hook
) (const char *section
, unsigned long num
);
71 void (*deprecated_show_load_progress
) (const char *section
,
72 unsigned long section_sent
,
73 unsigned long section_size
,
74 unsigned long total_sent
,
75 unsigned long total_size
);
76 void (*deprecated_pre_add_symbol_hook
) (const char *);
77 void (*deprecated_post_add_symbol_hook
) (void);
79 static void clear_symtab_users_cleanup (void *ignore
);
81 /* Global variables owned by this file */
82 int readnow_symbol_files
; /* Read full symbols immediately */
84 /* External variables and functions referenced. */
86 extern void report_transfer_performance (unsigned long, time_t, time_t);
88 /* Functions this file defines */
91 static int simple_read_overlay_region_table (void);
92 static void simple_free_overlay_region_table (void);
95 static void load_command (char *, int);
97 static void symbol_file_add_main_1 (char *args
, int from_tty
, int flags
);
99 static void add_symbol_file_command (char *, int);
101 bfd
*symfile_bfd_open (char *);
103 int get_section_index (struct objfile
*, char *);
105 static struct sym_fns
*find_sym_fns (bfd
*);
107 static void decrement_reading_symtab (void *);
109 static void overlay_invalidate_all (void);
111 void list_overlays_command (char *, int);
113 void map_overlay_command (char *, int);
115 void unmap_overlay_command (char *, int);
117 static void overlay_auto_command (char *, int);
119 static void overlay_manual_command (char *, int);
121 static void overlay_off_command (char *, int);
123 static void overlay_load_command (char *, int);
125 static void overlay_command (char *, int);
127 static void simple_free_overlay_table (void);
129 static void read_target_long_array (CORE_ADDR
, unsigned int *, int, int,
132 static int simple_read_overlay_table (void);
134 static int simple_overlay_update_1 (struct obj_section
*);
136 static void add_filename_language (char *ext
, enum language lang
);
138 static void info_ext_lang_command (char *args
, int from_tty
);
140 static void init_filename_language_table (void);
142 static void symfile_find_segment_sections (struct objfile
*objfile
);
144 void _initialize_symfile (void);
146 /* List of all available sym_fns. On gdb startup, each object file reader
147 calls add_symtab_fns() to register information on each format it is
150 static struct sym_fns
*symtab_fns
= NULL
;
152 /* Flag for whether user will be reloading symbols multiple times.
153 Defaults to ON for VxWorks, otherwise OFF. */
155 #ifdef SYMBOL_RELOADING_DEFAULT
156 int symbol_reloading
= SYMBOL_RELOADING_DEFAULT
;
158 int symbol_reloading
= 0;
161 show_symbol_reloading (struct ui_file
*file
, int from_tty
,
162 struct cmd_list_element
*c
, const char *value
)
164 fprintf_filtered (file
, _("\
165 Dynamic symbol table reloading multiple times in one run is %s.\n"),
169 /* If non-zero, shared library symbols will be added automatically
170 when the inferior is created, new libraries are loaded, or when
171 attaching to the inferior. This is almost always what users will
172 want to have happen; but for very large programs, the startup time
173 will be excessive, and so if this is a problem, the user can clear
174 this flag and then add the shared library symbols as needed. Note
175 that there is a potential for confusion, since if the shared
176 library symbols are not loaded, commands like "info fun" will *not*
177 report all the functions that are actually present. */
179 int auto_solib_add
= 1;
181 /* For systems that support it, a threshold size in megabytes. If
182 automatically adding a new library's symbol table to those already
183 known to the debugger would cause the total shared library symbol
184 size to exceed this threshhold, then the shlib's symbols are not
185 added. The threshold is ignored if the user explicitly asks for a
186 shlib to be added, such as when using the "sharedlibrary"
189 int auto_solib_limit
;
192 /* Make a null terminated copy of the string at PTR with SIZE characters in
193 the obstack pointed to by OBSTACKP . Returns the address of the copy.
194 Note that the string at PTR does not have to be null terminated, I.E. it
195 may be part of a larger string and we are only saving a substring. */
198 obsavestring (const char *ptr
, int size
, struct obstack
*obstackp
)
200 char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
201 /* Open-coded memcpy--saves function call time. These strings are usually
202 short. FIXME: Is this really still true with a compiler that can
205 const char *p1
= ptr
;
207 const char *end
= ptr
+ size
;
216 /* Concatenate NULL terminated variable argument list of `const char *' strings;
217 return the new string. Space is found in the OBSTACKP. Argument list must
218 be terminated by a sentinel expression `(char *) NULL'. */
221 obconcat (struct obstack
*obstackp
, ...)
225 va_start (ap
, obstackp
);
228 const char *s
= va_arg (ap
, const char *);
233 obstack_grow_str (obstackp
, s
);
236 obstack_1grow (obstackp
, 0);
238 return obstack_finish (obstackp
);
241 /* True if we are reading a symbol table. */
243 int currently_reading_symtab
= 0;
246 decrement_reading_symtab (void *dummy
)
248 currently_reading_symtab
--;
251 /* Increment currently_reading_symtab and return a cleanup that can be
252 used to decrement it. */
254 increment_reading_symtab (void)
256 ++currently_reading_symtab
;
257 return make_cleanup (decrement_reading_symtab
, NULL
);
260 /* Remember the lowest-addressed loadable section we've seen.
261 This function is called via bfd_map_over_sections.
263 In case of equal vmas, the section with the largest size becomes the
264 lowest-addressed loadable section.
266 If the vmas and sizes are equal, the last section is considered the
267 lowest-addressed loadable section. */
270 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
272 asection
**lowest
= (asection
**) obj
;
274 if (0 == (bfd_get_section_flags (abfd
, sect
) & (SEC_ALLOC
| SEC_LOAD
)))
277 *lowest
= sect
; /* First loadable section */
278 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
279 *lowest
= sect
; /* A lower loadable section */
280 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
281 && (bfd_section_size (abfd
, (*lowest
))
282 <= bfd_section_size (abfd
, sect
)))
286 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
288 struct section_addr_info
*
289 alloc_section_addr_info (size_t num_sections
)
291 struct section_addr_info
*sap
;
294 size
= (sizeof (struct section_addr_info
)
295 + sizeof (struct other_sections
) * (num_sections
- 1));
296 sap
= (struct section_addr_info
*) xmalloc (size
);
297 memset (sap
, 0, size
);
298 sap
->num_sections
= num_sections
;
303 /* Build (allocate and populate) a section_addr_info struct from
304 an existing section table. */
306 extern struct section_addr_info
*
307 build_section_addr_info_from_section_table (const struct target_section
*start
,
308 const struct target_section
*end
)
310 struct section_addr_info
*sap
;
311 const struct target_section
*stp
;
314 sap
= alloc_section_addr_info (end
- start
);
316 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
318 if (bfd_get_section_flags (stp
->bfd
,
319 stp
->the_bfd_section
) & (SEC_ALLOC
| SEC_LOAD
)
320 && oidx
< end
- start
)
322 sap
->other
[oidx
].addr
= stp
->addr
;
323 sap
->other
[oidx
].name
324 = xstrdup (bfd_section_name (stp
->bfd
, stp
->the_bfd_section
));
325 sap
->other
[oidx
].sectindex
= stp
->the_bfd_section
->index
;
333 /* Create a section_addr_info from section offsets in ABFD. */
335 static struct section_addr_info
*
336 build_section_addr_info_from_bfd (bfd
*abfd
)
338 struct section_addr_info
*sap
;
340 struct bfd_section
*sec
;
342 sap
= alloc_section_addr_info (bfd_count_sections (abfd
));
343 for (i
= 0, sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
344 if (bfd_get_section_flags (abfd
, sec
) & (SEC_ALLOC
| SEC_LOAD
))
346 sap
->other
[i
].addr
= bfd_get_section_vma (abfd
, sec
);
347 sap
->other
[i
].name
= xstrdup (bfd_get_section_name (abfd
, sec
));
348 sap
->other
[i
].sectindex
= sec
->index
;
354 /* Create a section_addr_info from section offsets in OBJFILE. */
356 struct section_addr_info
*
357 build_section_addr_info_from_objfile (const struct objfile
*objfile
)
359 struct section_addr_info
*sap
;
362 /* Before reread_symbols gets rewritten it is not safe to call:
363 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
365 sap
= build_section_addr_info_from_bfd (objfile
->obfd
);
366 for (i
= 0; i
< sap
->num_sections
&& sap
->other
[i
].name
; i
++)
368 int sectindex
= sap
->other
[i
].sectindex
;
370 sap
->other
[i
].addr
+= objfile
->section_offsets
->offsets
[sectindex
];
375 /* Free all memory allocated by build_section_addr_info_from_section_table. */
378 free_section_addr_info (struct section_addr_info
*sap
)
382 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
383 if (sap
->other
[idx
].name
)
384 xfree (sap
->other
[idx
].name
);
389 /* Initialize OBJFILE's sect_index_* members. */
391 init_objfile_sect_indices (struct objfile
*objfile
)
396 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
398 objfile
->sect_index_text
= sect
->index
;
400 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
402 objfile
->sect_index_data
= sect
->index
;
404 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
406 objfile
->sect_index_bss
= sect
->index
;
408 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
410 objfile
->sect_index_rodata
= sect
->index
;
412 /* This is where things get really weird... We MUST have valid
413 indices for the various sect_index_* members or gdb will abort.
414 So if for example, there is no ".text" section, we have to
415 accomodate that. First, check for a file with the standard
416 one or two segments. */
418 symfile_find_segment_sections (objfile
);
420 /* Except when explicitly adding symbol files at some address,
421 section_offsets contains nothing but zeros, so it doesn't matter
422 which slot in section_offsets the individual sect_index_* members
423 index into. So if they are all zero, it is safe to just point
424 all the currently uninitialized indices to the first slot. But
425 beware: if this is the main executable, it may be relocated
426 later, e.g. by the remote qOffsets packet, and then this will
427 be wrong! That's why we try segments first. */
429 for (i
= 0; i
< objfile
->num_sections
; i
++)
431 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
436 if (i
== objfile
->num_sections
)
438 if (objfile
->sect_index_text
== -1)
439 objfile
->sect_index_text
= 0;
440 if (objfile
->sect_index_data
== -1)
441 objfile
->sect_index_data
= 0;
442 if (objfile
->sect_index_bss
== -1)
443 objfile
->sect_index_bss
= 0;
444 if (objfile
->sect_index_rodata
== -1)
445 objfile
->sect_index_rodata
= 0;
449 /* The arguments to place_section. */
451 struct place_section_arg
453 struct section_offsets
*offsets
;
457 /* Find a unique offset to use for loadable section SECT if
458 the user did not provide an offset. */
461 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
463 struct place_section_arg
*arg
= obj
;
464 CORE_ADDR
*offsets
= arg
->offsets
->offsets
, start_addr
;
466 ULONGEST align
= ((ULONGEST
) 1) << bfd_get_section_alignment (abfd
, sect
);
468 /* We are only interested in allocated sections. */
469 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
472 /* If the user specified an offset, honor it. */
473 if (offsets
[sect
->index
] != 0)
476 /* Otherwise, let's try to find a place for the section. */
477 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
484 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
486 int indx
= cur_sec
->index
;
488 /* We don't need to compare against ourself. */
492 /* We can only conflict with allocated sections. */
493 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
496 /* If the section offset is 0, either the section has not been placed
497 yet, or it was the lowest section placed (in which case LOWEST
498 will be past its end). */
499 if (offsets
[indx
] == 0)
502 /* If this section would overlap us, then we must move up. */
503 if (start_addr
+ bfd_get_section_size (sect
) > offsets
[indx
]
504 && start_addr
< offsets
[indx
] + bfd_get_section_size (cur_sec
))
506 start_addr
= offsets
[indx
] + bfd_get_section_size (cur_sec
);
507 start_addr
= (start_addr
+ align
- 1) & -align
;
512 /* Otherwise, we appear to be OK. So far. */
517 offsets
[sect
->index
] = start_addr
;
518 arg
->lowest
= start_addr
+ bfd_get_section_size (sect
);
521 /* Store struct section_addr_info as prepared (made relative and with SECTINDEX
522 filled-in) by addr_info_make_relative into SECTION_OFFSETS of NUM_SECTIONS
526 relative_addr_info_to_section_offsets (struct section_offsets
*section_offsets
,
528 struct section_addr_info
*addrs
)
532 memset (section_offsets
, 0, SIZEOF_N_SECTION_OFFSETS (num_sections
));
534 /* Now calculate offsets for section that were specified by the caller. */
535 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
537 struct other_sections
*osp
;
539 osp
= &addrs
->other
[i
];
543 /* Record all sections in offsets */
544 /* The section_offsets in the objfile are here filled in using
546 section_offsets
->offsets
[osp
->sectindex
] = osp
->addr
;
550 /* qsort comparator for addrs_section_sort. Sort entries in ascending order by
551 their (name, sectindex) pair. sectindex makes the sort by name stable. */
554 addrs_section_compar (const void *ap
, const void *bp
)
556 const struct other_sections
*a
= *((struct other_sections
**) ap
);
557 const struct other_sections
*b
= *((struct other_sections
**) bp
);
558 int retval
, a_idx
, b_idx
;
560 retval
= strcmp (a
->name
, b
->name
);
564 /* SECTINDEX is undefined iff ADDR is zero. */
565 a_idx
= a
->addr
== 0 ? 0 : a
->sectindex
;
566 b_idx
= b
->addr
== 0 ? 0 : b
->sectindex
;
567 return a_idx
- b_idx
;
570 /* Provide sorted array of pointers to sections of ADDRS. The array is
571 terminated by NULL. Caller is responsible to call xfree for it. */
573 static struct other_sections
**
574 addrs_section_sort (struct section_addr_info
*addrs
)
576 struct other_sections
**array
;
579 /* `+ 1' for the NULL terminator. */
580 array
= xmalloc (sizeof (*array
) * (addrs
->num_sections
+ 1));
581 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
582 array
[i
] = &addrs
->other
[i
];
585 qsort (array
, i
, sizeof (*array
), addrs_section_compar
);
590 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
591 also SECTINDEXes specific to ABFD there. This function can be used to
592 rebase ADDRS to start referencing different BFD than before. */
595 addr_info_make_relative (struct section_addr_info
*addrs
, bfd
*abfd
)
597 asection
*lower_sect
;
598 CORE_ADDR lower_offset
;
600 struct cleanup
*my_cleanup
;
601 struct section_addr_info
*abfd_addrs
;
602 struct other_sections
**addrs_sorted
, **abfd_addrs_sorted
;
603 struct other_sections
**addrs_to_abfd_addrs
;
605 /* Find lowest loadable section to be used as starting point for
606 continguous sections. */
608 bfd_map_over_sections (abfd
, find_lowest_section
, &lower_sect
);
609 if (lower_sect
== NULL
)
611 warning (_("no loadable sections found in added symbol-file %s"),
612 bfd_get_filename (abfd
));
616 lower_offset
= bfd_section_vma (bfd_get_filename (abfd
), lower_sect
);
618 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
619 in ABFD. Section names are not unique - there can be multiple sections of
620 the same name. Also the sections of the same name do not have to be
621 adjacent to each other. Some sections may be present only in one of the
622 files. Even sections present in both files do not have to be in the same
625 Use stable sort by name for the sections in both files. Then linearly
626 scan both lists matching as most of the entries as possible. */
628 addrs_sorted
= addrs_section_sort (addrs
);
629 my_cleanup
= make_cleanup (xfree
, addrs_sorted
);
631 abfd_addrs
= build_section_addr_info_from_bfd (abfd
);
632 make_cleanup_free_section_addr_info (abfd_addrs
);
633 abfd_addrs_sorted
= addrs_section_sort (abfd_addrs
);
634 make_cleanup (xfree
, abfd_addrs_sorted
);
636 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and ABFD_ADDRS_SORTED. */
638 addrs_to_abfd_addrs
= xzalloc (sizeof (*addrs_to_abfd_addrs
)
639 * addrs
->num_sections
);
640 make_cleanup (xfree
, addrs_to_abfd_addrs
);
642 while (*addrs_sorted
)
644 const char *sect_name
= (*addrs_sorted
)->name
;
646 while (*abfd_addrs_sorted
647 && strcmp ((*abfd_addrs_sorted
)->name
, sect_name
) < 0)
650 if (*abfd_addrs_sorted
651 && strcmp ((*abfd_addrs_sorted
)->name
, sect_name
) == 0)
655 /* Make the found item directly addressable from ADDRS. */
656 index_in_addrs
= *addrs_sorted
- addrs
->other
;
657 gdb_assert (addrs_to_abfd_addrs
[index_in_addrs
] == NULL
);
658 addrs_to_abfd_addrs
[index_in_addrs
] = *abfd_addrs_sorted
;
660 /* Never use the same ABFD entry twice. */
667 /* Calculate offsets for the loadable sections.
668 FIXME! Sections must be in order of increasing loadable section
669 so that contiguous sections can use the lower-offset!!!
671 Adjust offsets if the segments are not contiguous.
672 If the section is contiguous, its offset should be set to
673 the offset of the highest loadable section lower than it
674 (the loadable section directly below it in memory).
675 this_offset = lower_offset = lower_addr - lower_orig_addr */
677 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
679 const char *sect_name
= addrs
->other
[i
].name
;
680 struct other_sections
*sect
= addrs_to_abfd_addrs
[i
];
684 /* This is the index used by BFD. */
685 addrs
->other
[i
].sectindex
= sect
->sectindex
;
687 if (addrs
->other
[i
].addr
!= 0)
689 addrs
->other
[i
].addr
-= sect
->addr
;
690 lower_offset
= addrs
->other
[i
].addr
;
693 addrs
->other
[i
].addr
= lower_offset
;
697 /* This section does not exist in ABFD, which is normally
698 unexpected and we want to issue a warning.
700 However, the ELF prelinker does create a few sections which are
701 marked in the main executable as loadable (they are loaded in
702 memory from the DYNAMIC segment) and yet are not present in
703 separate debug info files. This is fine, and should not cause
704 a warning. Shared libraries contain just the section
705 ".gnu.liblist" but it is not marked as loadable there. There is
706 no other way to identify them than by their name as the sections
707 created by prelink have no special flags. */
709 if (!(strcmp (sect_name
, ".gnu.liblist") == 0
710 || strcmp (sect_name
, ".gnu.conflict") == 0
711 || strcmp (sect_name
, ".dynbss") == 0
712 || strcmp (sect_name
, ".sdynbss") == 0))
713 warning (_("section %s not found in %s"), sect_name
,
714 bfd_get_filename (abfd
));
716 addrs
->other
[i
].addr
= 0;
718 /* SECTINDEX is invalid if ADDR is zero. */
722 do_cleanups (my_cleanup
);
725 /* Parse the user's idea of an offset for dynamic linking, into our idea
726 of how to represent it for fast symbol reading. This is the default
727 version of the sym_fns.sym_offsets function for symbol readers that
728 don't need to do anything special. It allocates a section_offsets table
729 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
732 default_symfile_offsets (struct objfile
*objfile
,
733 struct section_addr_info
*addrs
)
735 objfile
->num_sections
= bfd_count_sections (objfile
->obfd
);
736 objfile
->section_offsets
= (struct section_offsets
*)
737 obstack_alloc (&objfile
->objfile_obstack
,
738 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
739 relative_addr_info_to_section_offsets (objfile
->section_offsets
,
740 objfile
->num_sections
, addrs
);
742 /* For relocatable files, all loadable sections will start at zero.
743 The zero is meaningless, so try to pick arbitrary addresses such
744 that no loadable sections overlap. This algorithm is quadratic,
745 but the number of sections in a single object file is generally
747 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
749 struct place_section_arg arg
;
750 bfd
*abfd
= objfile
->obfd
;
753 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
754 /* We do not expect this to happen; just skip this step if the
755 relocatable file has a section with an assigned VMA. */
756 if (bfd_section_vma (abfd
, cur_sec
) != 0)
761 CORE_ADDR
*offsets
= objfile
->section_offsets
->offsets
;
763 /* Pick non-overlapping offsets for sections the user did not
765 arg
.offsets
= objfile
->section_offsets
;
767 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
769 /* Correctly filling in the section offsets is not quite
770 enough. Relocatable files have two properties that
771 (most) shared objects do not:
773 - Their debug information will contain relocations. Some
774 shared libraries do also, but many do not, so this can not
777 - If there are multiple code sections they will be loaded
778 at different relative addresses in memory than they are
779 in the objfile, since all sections in the file will start
782 Because GDB has very limited ability to map from an
783 address in debug info to the correct code section,
784 it relies on adding SECT_OFF_TEXT to things which might be
785 code. If we clear all the section offsets, and set the
786 section VMAs instead, then symfile_relocate_debug_section
787 will return meaningful debug information pointing at the
790 GDB has too many different data structures for section
791 addresses - a bfd, objfile, and so_list all have section
792 tables, as does exec_ops. Some of these could probably
795 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
796 cur_sec
= cur_sec
->next
)
798 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
801 bfd_set_section_vma (abfd
, cur_sec
, offsets
[cur_sec
->index
]);
802 exec_set_section_address (bfd_get_filename (abfd
), cur_sec
->index
,
803 offsets
[cur_sec
->index
]);
804 offsets
[cur_sec
->index
] = 0;
809 /* Remember the bfd indexes for the .text, .data, .bss and
811 init_objfile_sect_indices (objfile
);
815 /* Divide the file into segments, which are individual relocatable units.
816 This is the default version of the sym_fns.sym_segments function for
817 symbol readers that do not have an explicit representation of segments.
818 It assumes that object files do not have segments, and fully linked
819 files have a single segment. */
821 struct symfile_segment_data
*
822 default_symfile_segments (bfd
*abfd
)
826 struct symfile_segment_data
*data
;
829 /* Relocatable files contain enough information to position each
830 loadable section independently; they should not be relocated
832 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
835 /* Make sure there is at least one loadable section in the file. */
836 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
838 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
846 low
= bfd_get_section_vma (abfd
, sect
);
847 high
= low
+ bfd_get_section_size (sect
);
849 data
= XZALLOC (struct symfile_segment_data
);
850 data
->num_segments
= 1;
851 data
->segment_bases
= XCALLOC (1, CORE_ADDR
);
852 data
->segment_sizes
= XCALLOC (1, CORE_ADDR
);
854 num_sections
= bfd_count_sections (abfd
);
855 data
->segment_info
= XCALLOC (num_sections
, int);
857 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
861 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
864 vma
= bfd_get_section_vma (abfd
, sect
);
867 if (vma
+ bfd_get_section_size (sect
) > high
)
868 high
= vma
+ bfd_get_section_size (sect
);
870 data
->segment_info
[i
] = 1;
873 data
->segment_bases
[0] = low
;
874 data
->segment_sizes
[0] = high
- low
;
879 /* Process a symbol file, as either the main file or as a dynamically
882 OBJFILE is where the symbols are to be read from.
884 ADDRS is the list of section load addresses. If the user has given
885 an 'add-symbol-file' command, then this is the list of offsets and
886 addresses he or she provided as arguments to the command; or, if
887 we're handling a shared library, these are the actual addresses the
888 sections are loaded at, according to the inferior's dynamic linker
889 (as gleaned by GDB's shared library code). We convert each address
890 into an offset from the section VMA's as it appears in the object
891 file, and then call the file's sym_offsets function to convert this
892 into a format-specific offset table --- a `struct section_offsets'.
893 If ADDRS is non-zero, OFFSETS must be zero.
895 OFFSETS is a table of section offsets already in the right
896 format-specific representation. NUM_OFFSETS is the number of
897 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
898 assume this is the proper table the call to sym_offsets described
899 above would produce. Instead of calling sym_offsets, we just dump
900 it right into objfile->section_offsets. (When we're re-reading
901 symbols from an objfile, we don't have the original load address
902 list any more; all we have is the section offset table.) If
903 OFFSETS is non-zero, ADDRS must be zero.
905 ADD_FLAGS encodes verbosity level, whether this is main symbol or
906 an extra symbol file such as dynamically loaded code, and wether
907 breakpoint reset should be deferred. */
910 syms_from_objfile (struct objfile
*objfile
,
911 struct section_addr_info
*addrs
,
912 struct section_offsets
*offsets
,
916 struct section_addr_info
*local_addr
= NULL
;
917 struct cleanup
*old_chain
;
918 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
920 gdb_assert (! (addrs
&& offsets
));
922 init_entry_point_info (objfile
);
923 objfile
->sf
= find_sym_fns (objfile
->obfd
);
925 if (objfile
->sf
== NULL
)
926 return; /* No symbols. */
928 /* Make sure that partially constructed symbol tables will be cleaned up
929 if an error occurs during symbol reading. */
930 old_chain
= make_cleanup_free_objfile (objfile
);
932 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
933 list. We now establish the convention that an addr of zero means
934 no load address was specified. */
935 if (! addrs
&& ! offsets
)
938 = alloc_section_addr_info (bfd_count_sections (objfile
->obfd
));
939 make_cleanup (xfree
, local_addr
);
943 /* Now either addrs or offsets is non-zero. */
947 /* We will modify the main symbol table, make sure that all its users
948 will be cleaned up if an error occurs during symbol reading. */
949 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
951 /* Since no error yet, throw away the old symbol table. */
953 if (symfile_objfile
!= NULL
)
955 free_objfile (symfile_objfile
);
956 gdb_assert (symfile_objfile
== NULL
);
959 /* Currently we keep symbols from the add-symbol-file command.
960 If the user wants to get rid of them, they should do "symbol-file"
961 without arguments first. Not sure this is the best behavior
964 (*objfile
->sf
->sym_new_init
) (objfile
);
967 /* Convert addr into an offset rather than an absolute address.
968 We find the lowest address of a loaded segment in the objfile,
969 and assume that <addr> is where that got loaded.
971 We no longer warn if the lowest section is not a text segment (as
972 happens for the PA64 port. */
973 if (addrs
&& addrs
->other
[0].name
)
974 addr_info_make_relative (addrs
, objfile
->obfd
);
976 /* Initialize symbol reading routines for this objfile, allow complaints to
977 appear for this new file, and record how verbose to be, then do the
978 initial symbol reading for this file. */
980 (*objfile
->sf
->sym_init
) (objfile
);
981 clear_complaints (&symfile_complaints
, 1, add_flags
& SYMFILE_VERBOSE
);
984 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
987 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_offsets
);
989 /* Just copy in the offset table directly as given to us. */
990 objfile
->num_sections
= num_offsets
;
991 objfile
->section_offsets
992 = ((struct section_offsets
*)
993 obstack_alloc (&objfile
->objfile_obstack
, size
));
994 memcpy (objfile
->section_offsets
, offsets
, size
);
996 init_objfile_sect_indices (objfile
);
999 (*objfile
->sf
->sym_read
) (objfile
, add_flags
);
1001 /* Discard cleanups as symbol reading was successful. */
1003 discard_cleanups (old_chain
);
1007 /* Perform required actions after either reading in the initial
1008 symbols for a new objfile, or mapping in the symbols from a reusable
1012 new_symfile_objfile (struct objfile
*objfile
, int add_flags
)
1014 /* If this is the main symbol file we have to clean up all users of the
1015 old main symbol file. Otherwise it is sufficient to fixup all the
1016 breakpoints that may have been redefined by this symbol file. */
1017 if (add_flags
& SYMFILE_MAINLINE
)
1019 /* OK, make it the "real" symbol file. */
1020 symfile_objfile
= objfile
;
1022 clear_symtab_users ();
1024 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
1026 breakpoint_re_set ();
1029 /* We're done reading the symbol file; finish off complaints. */
1030 clear_complaints (&symfile_complaints
, 0, add_flags
& SYMFILE_VERBOSE
);
1033 /* Process a symbol file, as either the main file or as a dynamically
1036 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1037 This BFD will be closed on error, and is always consumed by this function.
1039 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1040 extra, such as dynamically loaded code, and what to do with breakpoins.
1042 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
1043 syms_from_objfile, above.
1044 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1046 Upon success, returns a pointer to the objfile that was added.
1047 Upon failure, jumps back to command level (never returns). */
1049 static struct objfile
*
1050 symbol_file_add_with_addrs_or_offsets (bfd
*abfd
,
1052 struct section_addr_info
*addrs
,
1053 struct section_offsets
*offsets
,
1057 struct objfile
*objfile
;
1058 struct cleanup
*my_cleanups
;
1059 const char *name
= bfd_get_filename (abfd
);
1060 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1062 if (readnow_symbol_files
)
1063 flags
|= OBJF_READNOW
;
1065 my_cleanups
= make_cleanup_bfd_close (abfd
);
1067 /* Give user a chance to burp if we'd be
1068 interactively wiping out any existing symbols. */
1070 if ((have_full_symbols () || have_partial_symbols ())
1071 && (add_flags
& SYMFILE_MAINLINE
)
1073 && !query (_("Load new symbol table from \"%s\"? "), name
))
1074 error (_("Not confirmed."));
1076 objfile
= allocate_objfile (abfd
, flags
);
1077 discard_cleanups (my_cleanups
);
1079 /* We either created a new mapped symbol table, mapped an existing
1080 symbol table file which has not had initial symbol reading
1081 performed, or need to read an unmapped symbol table. */
1082 if (from_tty
|| info_verbose
)
1084 if (deprecated_pre_add_symbol_hook
)
1085 deprecated_pre_add_symbol_hook (name
);
1088 printf_unfiltered (_("Reading symbols from %s..."), name
);
1090 gdb_flush (gdb_stdout
);
1093 syms_from_objfile (objfile
, addrs
, offsets
, num_offsets
,
1096 /* We now have at least a partial symbol table. Check to see if the
1097 user requested that all symbols be read on initial access via either
1098 the gdb startup command line or on a per symbol file basis. Expand
1099 all partial symbol tables for this objfile if so. */
1101 if ((flags
& OBJF_READNOW
))
1103 if (from_tty
|| info_verbose
)
1105 printf_unfiltered (_("expanding to full symbols..."));
1107 gdb_flush (gdb_stdout
);
1111 objfile
->sf
->qf
->expand_all_symtabs (objfile
);
1114 if ((from_tty
|| info_verbose
)
1115 && !objfile_has_symbols (objfile
))
1118 printf_unfiltered (_("(no debugging symbols found)..."));
1122 if (from_tty
|| info_verbose
)
1124 if (deprecated_post_add_symbol_hook
)
1125 deprecated_post_add_symbol_hook ();
1127 printf_unfiltered (_("done.\n"));
1130 /* We print some messages regardless of whether 'from_tty ||
1131 info_verbose' is true, so make sure they go out at the right
1133 gdb_flush (gdb_stdout
);
1135 do_cleanups (my_cleanups
);
1137 if (objfile
->sf
== NULL
)
1139 observer_notify_new_objfile (objfile
);
1140 return objfile
; /* No symbols. */
1143 new_symfile_objfile (objfile
, add_flags
);
1145 observer_notify_new_objfile (objfile
);
1147 bfd_cache_close_all ();
1151 /* Add BFD as a separate debug file for OBJFILE. */
1154 symbol_file_add_separate (bfd
*bfd
, int symfile_flags
, struct objfile
*objfile
)
1156 struct objfile
*new_objfile
;
1157 struct section_addr_info
*sap
;
1158 struct cleanup
*my_cleanup
;
1160 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1161 because sections of BFD may not match sections of OBJFILE and because
1162 vma may have been modified by tools such as prelink. */
1163 sap
= build_section_addr_info_from_objfile (objfile
);
1164 my_cleanup
= make_cleanup_free_section_addr_info (sap
);
1166 new_objfile
= symbol_file_add_with_addrs_or_offsets
1167 (bfd
, symfile_flags
,
1169 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1170 | OBJF_USERLOADED
));
1172 do_cleanups (my_cleanup
);
1174 add_separate_debug_objfile (new_objfile
, objfile
);
1177 /* Process the symbol file ABFD, as either the main file or as a
1178 dynamically loaded file.
1180 See symbol_file_add_with_addrs_or_offsets's comments for
1183 symbol_file_add_from_bfd (bfd
*abfd
, int add_flags
,
1184 struct section_addr_info
*addrs
,
1187 return symbol_file_add_with_addrs_or_offsets (abfd
, add_flags
, addrs
, 0, 0,
1192 /* Process a symbol file, as either the main file or as a dynamically
1193 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
1196 symbol_file_add (char *name
, int add_flags
, struct section_addr_info
*addrs
,
1199 return symbol_file_add_from_bfd (symfile_bfd_open (name
), add_flags
, addrs
,
1204 /* Call symbol_file_add() with default values and update whatever is
1205 affected by the loading of a new main().
1206 Used when the file is supplied in the gdb command line
1207 and by some targets with special loading requirements.
1208 The auxiliary function, symbol_file_add_main_1(), has the flags
1209 argument for the switches that can only be specified in the symbol_file
1213 symbol_file_add_main (char *args
, int from_tty
)
1215 symbol_file_add_main_1 (args
, from_tty
, 0);
1219 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
1221 const int add_flags
= SYMFILE_MAINLINE
| (from_tty
? SYMFILE_VERBOSE
: 0);
1222 symbol_file_add (args
, add_flags
, NULL
, flags
);
1224 /* Getting new symbols may change our opinion about
1225 what is frameless. */
1226 reinit_frame_cache ();
1228 set_initial_language ();
1232 symbol_file_clear (int from_tty
)
1234 if ((have_full_symbols () || have_partial_symbols ())
1237 ? !query (_("Discard symbol table from `%s'? "),
1238 symfile_objfile
->name
)
1239 : !query (_("Discard symbol table? "))))
1240 error (_("Not confirmed."));
1242 /* solib descriptors may have handles to objfiles. Wipe them before their
1243 objfiles get stale by free_all_objfiles. */
1244 no_shared_libraries (NULL
, from_tty
);
1246 free_all_objfiles ();
1248 gdb_assert (symfile_objfile
== NULL
);
1250 printf_unfiltered (_("No symbol file now.\n"));
1254 get_debug_link_info (struct objfile
*objfile
, unsigned long *crc32_out
)
1257 bfd_size_type debuglink_size
;
1258 unsigned long crc32
;
1262 sect
= bfd_get_section_by_name (objfile
->obfd
, ".gnu_debuglink");
1267 debuglink_size
= bfd_section_size (objfile
->obfd
, sect
);
1269 contents
= xmalloc (debuglink_size
);
1270 bfd_get_section_contents (objfile
->obfd
, sect
, contents
,
1271 (file_ptr
)0, (bfd_size_type
)debuglink_size
);
1273 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1274 crc_offset
= strlen (contents
) + 1;
1275 crc_offset
= (crc_offset
+ 3) & ~3;
1277 crc32
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) (contents
+ crc_offset
));
1284 separate_debug_file_exists (const char *name
, unsigned long crc
,
1285 struct objfile
*parent_objfile
)
1287 unsigned long file_crc
= 0;
1289 gdb_byte buffer
[8*1024];
1291 struct stat parent_stat
, abfd_stat
;
1293 /* Find a separate debug info file as if symbols would be present in
1294 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1295 section can contain just the basename of PARENT_OBJFILE without any
1296 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1297 the separate debug infos with the same basename can exist. */
1299 if (strcmp (name
, parent_objfile
->name
) == 0)
1302 abfd
= bfd_open_maybe_remote (name
);
1307 /* Verify symlinks were not the cause of strcmp name difference above.
1309 Some operating systems, e.g. Windows, do not provide a meaningful
1310 st_ino; they always set it to zero. (Windows does provide a
1311 meaningful st_dev.) Do not indicate a duplicate library in that
1312 case. While there is no guarantee that a system that provides
1313 meaningful inode numbers will never set st_ino to zero, this is
1314 merely an optimization, so we do not need to worry about false
1317 if (bfd_stat (abfd
, &abfd_stat
) == 0
1318 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0
1319 && abfd_stat
.st_dev
== parent_stat
.st_dev
1320 && abfd_stat
.st_ino
== parent_stat
.st_ino
1321 && abfd_stat
.st_ino
!= 0)
1327 while ((count
= bfd_bread (buffer
, sizeof (buffer
), abfd
)) > 0)
1328 file_crc
= gnu_debuglink_crc32 (file_crc
, buffer
, count
);
1332 if (crc
!= file_crc
)
1334 warning (_("the debug information found in \"%s\""
1335 " does not match \"%s\" (CRC mismatch).\n"),
1336 name
, parent_objfile
->name
);
1343 char *debug_file_directory
= NULL
;
1345 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1346 struct cmd_list_element
*c
, const char *value
)
1348 fprintf_filtered (file
, _("\
1349 The directory where separate debug symbols are searched for is \"%s\".\n"),
1353 #if ! defined (DEBUG_SUBDIRECTORY)
1354 #define DEBUG_SUBDIRECTORY ".debug"
1358 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1360 char *basename
, *debugdir
;
1362 char *debugfile
= NULL
;
1363 char *canon_name
= NULL
;
1364 unsigned long crc32
;
1367 basename
= get_debug_link_info (objfile
, &crc32
);
1369 if (basename
== NULL
)
1370 /* There's no separate debug info, hence there's no way we could
1371 load it => no warning. */
1372 goto cleanup_return_debugfile
;
1374 dir
= xstrdup (objfile
->name
);
1376 /* Strip off the final filename part, leaving the directory name,
1377 followed by a slash. Objfile names should always be absolute and
1378 tilde-expanded, so there should always be a slash in there
1380 for (i
= strlen(dir
) - 1; i
>= 0; i
--)
1382 if (IS_DIR_SEPARATOR (dir
[i
]))
1385 gdb_assert (i
>= 0 && IS_DIR_SEPARATOR (dir
[i
]));
1388 /* Set I to max (strlen (canon_name), strlen (dir)). */
1389 canon_name
= lrealpath (dir
);
1391 if (canon_name
&& strlen (canon_name
) > i
)
1392 i
= strlen (canon_name
);
1394 debugfile
= xmalloc (strlen (debug_file_directory
) + 1
1396 + strlen (DEBUG_SUBDIRECTORY
)
1401 /* First try in the same directory as the original file. */
1402 strcpy (debugfile
, dir
);
1403 strcat (debugfile
, basename
);
1405 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1406 goto cleanup_return_debugfile
;
1408 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1409 strcpy (debugfile
, dir
);
1410 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1411 strcat (debugfile
, "/");
1412 strcat (debugfile
, basename
);
1414 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1415 goto cleanup_return_debugfile
;
1417 /* Then try in the global debugfile directories.
1419 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1420 cause "/..." lookups. */
1422 debugdir
= debug_file_directory
;
1427 while (*debugdir
== DIRNAME_SEPARATOR
)
1430 debugdir_end
= strchr (debugdir
, DIRNAME_SEPARATOR
);
1431 if (debugdir_end
== NULL
)
1432 debugdir_end
= &debugdir
[strlen (debugdir
)];
1434 memcpy (debugfile
, debugdir
, debugdir_end
- debugdir
);
1435 debugfile
[debugdir_end
- debugdir
] = 0;
1436 strcat (debugfile
, "/");
1437 strcat (debugfile
, dir
);
1438 strcat (debugfile
, basename
);
1440 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1441 goto cleanup_return_debugfile
;
1443 /* If the file is in the sysroot, try using its base path in the
1444 global debugfile directory. */
1446 && strncmp (canon_name
, gdb_sysroot
, strlen (gdb_sysroot
)) == 0
1447 && IS_DIR_SEPARATOR (canon_name
[strlen (gdb_sysroot
)]))
1449 memcpy (debugfile
, debugdir
, debugdir_end
- debugdir
);
1450 debugfile
[debugdir_end
- debugdir
] = 0;
1451 strcat (debugfile
, canon_name
+ strlen (gdb_sysroot
));
1452 strcat (debugfile
, "/");
1453 strcat (debugfile
, basename
);
1455 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1456 goto cleanup_return_debugfile
;
1459 debugdir
= debugdir_end
;
1461 while (*debugdir
!= 0);
1466 cleanup_return_debugfile
:
1474 /* This is the symbol-file command. Read the file, analyze its
1475 symbols, and add a struct symtab to a symtab list. The syntax of
1476 the command is rather bizarre:
1478 1. The function buildargv implements various quoting conventions
1479 which are undocumented and have little or nothing in common with
1480 the way things are quoted (or not quoted) elsewhere in GDB.
1482 2. Options are used, which are not generally used in GDB (perhaps
1483 "set mapped on", "set readnow on" would be better)
1485 3. The order of options matters, which is contrary to GNU
1486 conventions (because it is confusing and inconvenient). */
1489 symbol_file_command (char *args
, int from_tty
)
1495 symbol_file_clear (from_tty
);
1499 char **argv
= gdb_buildargv (args
);
1500 int flags
= OBJF_USERLOADED
;
1501 struct cleanup
*cleanups
;
1504 cleanups
= make_cleanup_freeargv (argv
);
1505 while (*argv
!= NULL
)
1507 if (strcmp (*argv
, "-readnow") == 0)
1508 flags
|= OBJF_READNOW
;
1509 else if (**argv
== '-')
1510 error (_("unknown option `%s'"), *argv
);
1513 symbol_file_add_main_1 (*argv
, from_tty
, flags
);
1521 error (_("no symbol file name was specified"));
1523 do_cleanups (cleanups
);
1527 /* Set the initial language.
1529 FIXME: A better solution would be to record the language in the
1530 psymtab when reading partial symbols, and then use it (if known) to
1531 set the language. This would be a win for formats that encode the
1532 language in an easily discoverable place, such as DWARF. For
1533 stabs, we can jump through hoops looking for specially named
1534 symbols or try to intuit the language from the specific type of
1535 stabs we find, but we can't do that until later when we read in
1539 set_initial_language (void)
1542 enum language lang
= language_unknown
;
1544 filename
= find_main_filename ();
1545 if (filename
!= NULL
)
1546 lang
= deduce_language_from_filename (filename
);
1548 if (lang
== language_unknown
)
1550 /* Make C the default language */
1554 set_language (lang
);
1555 expected_language
= current_language
; /* Don't warn the user. */
1558 /* If NAME is a remote name open the file using remote protocol, otherwise
1559 open it normally. */
1562 bfd_open_maybe_remote (const char *name
)
1564 if (remote_filename_p (name
))
1565 return remote_bfd_open (name
, gnutarget
);
1567 return bfd_openr (name
, gnutarget
);
1571 /* Open the file specified by NAME and hand it off to BFD for
1572 preliminary analysis. Return a newly initialized bfd *, which
1573 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1574 absolute). In case of trouble, error() is called. */
1577 symfile_bfd_open (char *name
)
1581 char *absolute_name
;
1583 if (remote_filename_p (name
))
1585 name
= xstrdup (name
);
1586 sym_bfd
= remote_bfd_open (name
, gnutarget
);
1589 make_cleanup (xfree
, name
);
1590 error (_("`%s': can't open to read symbols: %s."), name
,
1591 bfd_errmsg (bfd_get_error ()));
1594 if (!bfd_check_format (sym_bfd
, bfd_object
))
1596 bfd_close (sym_bfd
);
1597 make_cleanup (xfree
, name
);
1598 error (_("`%s': can't read symbols: %s."), name
,
1599 bfd_errmsg (bfd_get_error ()));
1605 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy. */
1607 /* Look down path for it, allocate 2nd new malloc'd copy. */
1608 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, name
,
1609 O_RDONLY
| O_BINARY
, &absolute_name
);
1610 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1613 char *exename
= alloca (strlen (name
) + 5);
1615 strcat (strcpy (exename
, name
), ".exe");
1616 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, exename
,
1617 O_RDONLY
| O_BINARY
, &absolute_name
);
1622 make_cleanup (xfree
, name
);
1623 perror_with_name (name
);
1626 /* Free 1st new malloc'd copy, but keep the 2nd malloc'd copy in
1627 bfd. It'll be freed in free_objfile(). */
1629 name
= absolute_name
;
1631 sym_bfd
= bfd_fopen (name
, gnutarget
, FOPEN_RB
, desc
);
1635 make_cleanup (xfree
, name
);
1636 error (_("`%s': can't open to read symbols: %s."), name
,
1637 bfd_errmsg (bfd_get_error ()));
1639 bfd_set_cacheable (sym_bfd
, 1);
1641 if (!bfd_check_format (sym_bfd
, bfd_object
))
1643 /* FIXME: should be checking for errors from bfd_close (for one
1644 thing, on error it does not free all the storage associated
1646 bfd_close (sym_bfd
); /* This also closes desc. */
1647 make_cleanup (xfree
, name
);
1648 error (_("`%s': can't read symbols: %s."), name
,
1649 bfd_errmsg (bfd_get_error ()));
1652 /* bfd_usrdata exists for applications and libbfd must not touch it. */
1653 gdb_assert (bfd_usrdata (sym_bfd
) == NULL
);
1658 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1659 the section was not found. */
1662 get_section_index (struct objfile
*objfile
, char *section_name
)
1664 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1672 /* Link SF into the global symtab_fns list. Called on startup by the
1673 _initialize routine in each object file format reader, to register
1674 information about each format the the reader is prepared to
1678 add_symtab_fns (struct sym_fns
*sf
)
1680 sf
->next
= symtab_fns
;
1684 /* Initialize OBJFILE to read symbols from its associated BFD. It
1685 either returns or calls error(). The result is an initialized
1686 struct sym_fns in the objfile structure, that contains cached
1687 information about the symbol file. */
1689 static struct sym_fns
*
1690 find_sym_fns (bfd
*abfd
)
1693 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1695 if (our_flavour
== bfd_target_srec_flavour
1696 || our_flavour
== bfd_target_ihex_flavour
1697 || our_flavour
== bfd_target_tekhex_flavour
)
1698 return NULL
; /* No symbols. */
1700 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
->next
)
1701 if (our_flavour
== sf
->sym_flavour
)
1704 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1705 bfd_get_target (abfd
));
1709 /* This function runs the load command of our current target. */
1712 load_command (char *arg
, int from_tty
)
1714 /* The user might be reloading because the binary has changed. Take
1715 this opportunity to check. */
1716 reopen_exec_file ();
1724 parg
= arg
= get_exec_file (1);
1726 /* Count how many \ " ' tab space there are in the name. */
1727 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1735 /* We need to quote this string so buildargv can pull it apart. */
1736 char *temp
= xmalloc (strlen (arg
) + count
+ 1 );
1740 make_cleanup (xfree
, temp
);
1743 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1745 strncpy (ptemp
, prev
, parg
- prev
);
1746 ptemp
+= parg
- prev
;
1750 strcpy (ptemp
, prev
);
1756 target_load (arg
, from_tty
);
1758 /* After re-loading the executable, we don't really know which
1759 overlays are mapped any more. */
1760 overlay_cache_invalid
= 1;
1763 /* This version of "load" should be usable for any target. Currently
1764 it is just used for remote targets, not inftarg.c or core files,
1765 on the theory that only in that case is it useful.
1767 Avoiding xmodem and the like seems like a win (a) because we don't have
1768 to worry about finding it, and (b) On VMS, fork() is very slow and so
1769 we don't want to run a subprocess. On the other hand, I'm not sure how
1770 performance compares. */
1772 static int validate_download
= 0;
1774 /* Callback service function for generic_load (bfd_map_over_sections). */
1777 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1779 bfd_size_type
*sum
= data
;
1781 *sum
+= bfd_get_section_size (asec
);
1784 /* Opaque data for load_section_callback. */
1785 struct load_section_data
{
1786 unsigned long load_offset
;
1787 struct load_progress_data
*progress_data
;
1788 VEC(memory_write_request_s
) *requests
;
1791 /* Opaque data for load_progress. */
1792 struct load_progress_data
{
1793 /* Cumulative data. */
1794 unsigned long write_count
;
1795 unsigned long data_count
;
1796 bfd_size_type total_size
;
1799 /* Opaque data for load_progress for a single section. */
1800 struct load_progress_section_data
{
1801 struct load_progress_data
*cumulative
;
1803 /* Per-section data. */
1804 const char *section_name
;
1805 ULONGEST section_sent
;
1806 ULONGEST section_size
;
1811 /* Target write callback routine for progress reporting. */
1814 load_progress (ULONGEST bytes
, void *untyped_arg
)
1816 struct load_progress_section_data
*args
= untyped_arg
;
1817 struct load_progress_data
*totals
;
1820 /* Writing padding data. No easy way to get at the cumulative
1821 stats, so just ignore this. */
1824 totals
= args
->cumulative
;
1826 if (bytes
== 0 && args
->section_sent
== 0)
1828 /* The write is just starting. Let the user know we've started
1830 ui_out_message (uiout
, 0, "Loading section %s, size %s lma %s\n",
1831 args
->section_name
, hex_string (args
->section_size
),
1832 paddress (target_gdbarch
, args
->lma
));
1836 if (validate_download
)
1838 /* Broken memories and broken monitors manifest themselves here
1839 when bring new computers to life. This doubles already slow
1841 /* NOTE: cagney/1999-10-18: A more efficient implementation
1842 might add a verify_memory() method to the target vector and
1843 then use that. remote.c could implement that method using
1844 the ``qCRC'' packet. */
1845 gdb_byte
*check
= xmalloc (bytes
);
1846 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
1848 if (target_read_memory (args
->lma
, check
, bytes
) != 0)
1849 error (_("Download verify read failed at %s"),
1850 paddress (target_gdbarch
, args
->lma
));
1851 if (memcmp (args
->buffer
, check
, bytes
) != 0)
1852 error (_("Download verify compare failed at %s"),
1853 paddress (target_gdbarch
, args
->lma
));
1854 do_cleanups (verify_cleanups
);
1856 totals
->data_count
+= bytes
;
1858 args
->buffer
+= bytes
;
1859 totals
->write_count
+= 1;
1860 args
->section_sent
+= bytes
;
1862 || (deprecated_ui_load_progress_hook
!= NULL
1863 && deprecated_ui_load_progress_hook (args
->section_name
,
1864 args
->section_sent
)))
1865 error (_("Canceled the download"));
1867 if (deprecated_show_load_progress
!= NULL
)
1868 deprecated_show_load_progress (args
->section_name
,
1872 totals
->total_size
);
1875 /* Callback service function for generic_load (bfd_map_over_sections). */
1878 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1880 struct memory_write_request
*new_request
;
1881 struct load_section_data
*args
= data
;
1882 struct load_progress_section_data
*section_data
;
1883 bfd_size_type size
= bfd_get_section_size (asec
);
1885 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1887 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
1893 new_request
= VEC_safe_push (memory_write_request_s
,
1894 args
->requests
, NULL
);
1895 memset (new_request
, 0, sizeof (struct memory_write_request
));
1896 section_data
= xcalloc (1, sizeof (struct load_progress_section_data
));
1897 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1898 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size be in instead? */
1899 new_request
->data
= xmalloc (size
);
1900 new_request
->baton
= section_data
;
1902 buffer
= new_request
->data
;
1904 section_data
->cumulative
= args
->progress_data
;
1905 section_data
->section_name
= sect_name
;
1906 section_data
->section_size
= size
;
1907 section_data
->lma
= new_request
->begin
;
1908 section_data
->buffer
= buffer
;
1910 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1913 /* Clean up an entire memory request vector, including load
1914 data and progress records. */
1917 clear_memory_write_data (void *arg
)
1919 VEC(memory_write_request_s
) **vec_p
= arg
;
1920 VEC(memory_write_request_s
) *vec
= *vec_p
;
1922 struct memory_write_request
*mr
;
1924 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
1929 VEC_free (memory_write_request_s
, vec
);
1933 generic_load (char *args
, int from_tty
)
1936 struct timeval start_time
, end_time
;
1938 struct cleanup
*old_cleanups
= make_cleanup (null_cleanup
, 0);
1939 struct load_section_data cbdata
;
1940 struct load_progress_data total_progress
;
1945 memset (&cbdata
, 0, sizeof (cbdata
));
1946 memset (&total_progress
, 0, sizeof (total_progress
));
1947 cbdata
.progress_data
= &total_progress
;
1949 make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
1952 error_no_arg (_("file to load"));
1954 argv
= gdb_buildargv (args
);
1955 make_cleanup_freeargv (argv
);
1957 filename
= tilde_expand (argv
[0]);
1958 make_cleanup (xfree
, filename
);
1960 if (argv
[1] != NULL
)
1964 cbdata
.load_offset
= strtoul (argv
[1], &endptr
, 0);
1966 /* If the last word was not a valid number then
1967 treat it as a file name with spaces in. */
1968 if (argv
[1] == endptr
)
1969 error (_("Invalid download offset:%s."), argv
[1]);
1971 if (argv
[2] != NULL
)
1972 error (_("Too many parameters."));
1975 /* Open the file for loading. */
1976 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
1977 if (loadfile_bfd
== NULL
)
1979 perror_with_name (filename
);
1983 /* FIXME: should be checking for errors from bfd_close (for one thing,
1984 on error it does not free all the storage associated with the
1986 make_cleanup_bfd_close (loadfile_bfd
);
1988 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
1990 error (_("\"%s\" is not an object file: %s"), filename
,
1991 bfd_errmsg (bfd_get_error ()));
1994 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
1995 (void *) &total_progress
.total_size
);
1997 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
1999 gettimeofday (&start_time
, NULL
);
2001 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2002 load_progress
) != 0)
2003 error (_("Load failed"));
2005 gettimeofday (&end_time
, NULL
);
2007 entry
= bfd_get_start_address (loadfile_bfd
);
2008 ui_out_text (uiout
, "Start address ");
2009 ui_out_field_fmt (uiout
, "address", "%s", paddress (target_gdbarch
, entry
));
2010 ui_out_text (uiout
, ", load size ");
2011 ui_out_field_fmt (uiout
, "load-size", "%lu", total_progress
.data_count
);
2012 ui_out_text (uiout
, "\n");
2013 /* We were doing this in remote-mips.c, I suspect it is right
2014 for other targets too. */
2015 regcache_write_pc (get_current_regcache (), entry
);
2017 /* Reset breakpoints, now that we have changed the load image. For
2018 instance, breakpoints may have been set (or reset, by
2019 post_create_inferior) while connected to the target but before we
2020 loaded the program. In that case, the prologue analyzer could
2021 have read instructions from the target to find the right
2022 breakpoint locations. Loading has changed the contents of that
2025 breakpoint_re_set ();
2027 /* FIXME: are we supposed to call symbol_file_add or not? According
2028 to a comment from remote-mips.c (where a call to symbol_file_add
2029 was commented out), making the call confuses GDB if more than one
2030 file is loaded in. Some targets do (e.g., remote-vx.c) but
2031 others don't (or didn't - perhaps they have all been deleted). */
2033 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2034 total_progress
.write_count
,
2035 &start_time
, &end_time
);
2037 do_cleanups (old_cleanups
);
2040 /* Report how fast the transfer went. */
2042 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
2043 replaced by print_transfer_performance (with a very different
2044 function signature). */
2047 report_transfer_performance (unsigned long data_count
, time_t start_time
,
2050 struct timeval start
, end
;
2052 start
.tv_sec
= start_time
;
2054 end
.tv_sec
= end_time
;
2057 print_transfer_performance (gdb_stdout
, data_count
, 0, &start
, &end
);
2061 print_transfer_performance (struct ui_file
*stream
,
2062 unsigned long data_count
,
2063 unsigned long write_count
,
2064 const struct timeval
*start_time
,
2065 const struct timeval
*end_time
)
2067 ULONGEST time_count
;
2069 /* Compute the elapsed time in milliseconds, as a tradeoff between
2070 accuracy and overflow. */
2071 time_count
= (end_time
->tv_sec
- start_time
->tv_sec
) * 1000;
2072 time_count
+= (end_time
->tv_usec
- start_time
->tv_usec
) / 1000;
2074 ui_out_text (uiout
, "Transfer rate: ");
2077 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / time_count
;
2079 if (ui_out_is_mi_like_p (uiout
))
2081 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
* 8);
2082 ui_out_text (uiout
, " bits/sec");
2084 else if (rate
< 1024)
2086 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
);
2087 ui_out_text (uiout
, " bytes/sec");
2091 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
/ 1024);
2092 ui_out_text (uiout
, " KB/sec");
2097 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
2098 ui_out_text (uiout
, " bits in <1 sec");
2100 if (write_count
> 0)
2102 ui_out_text (uiout
, ", ");
2103 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
2104 ui_out_text (uiout
, " bytes/write");
2106 ui_out_text (uiout
, ".\n");
2109 /* This function allows the addition of incrementally linked object files.
2110 It does not modify any state in the target, only in the debugger. */
2111 /* Note: ezannoni 2000-04-13 This function/command used to have a
2112 special case syntax for the rombug target (Rombug is the boot
2113 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2114 rombug case, the user doesn't need to supply a text address,
2115 instead a call to target_link() (in target.c) would supply the
2116 value to use. We are now discontinuing this type of ad hoc syntax. */
2119 add_symbol_file_command (char *args
, int from_tty
)
2121 struct gdbarch
*gdbarch
= get_current_arch ();
2122 char *filename
= NULL
;
2123 int flags
= OBJF_USERLOADED
;
2125 int section_index
= 0;
2129 int expecting_sec_name
= 0;
2130 int expecting_sec_addr
= 0;
2139 struct section_addr_info
*section_addrs
;
2140 struct sect_opt
*sect_opts
= NULL
;
2141 size_t num_sect_opts
= 0;
2142 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2145 sect_opts
= (struct sect_opt
*) xmalloc (num_sect_opts
2146 * sizeof (struct sect_opt
));
2151 error (_("add-symbol-file takes a file name and an address"));
2153 argv
= gdb_buildargv (args
);
2154 make_cleanup_freeargv (argv
);
2156 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2158 /* Process the argument. */
2161 /* The first argument is the file name. */
2162 filename
= tilde_expand (arg
);
2163 make_cleanup (xfree
, filename
);
2168 /* The second argument is always the text address at which
2169 to load the program. */
2170 sect_opts
[section_index
].name
= ".text";
2171 sect_opts
[section_index
].value
= arg
;
2172 if (++section_index
>= num_sect_opts
)
2175 sect_opts
= ((struct sect_opt
*)
2176 xrealloc (sect_opts
,
2178 * sizeof (struct sect_opt
)));
2183 /* It's an option (starting with '-') or it's an argument
2188 if (strcmp (arg
, "-readnow") == 0)
2189 flags
|= OBJF_READNOW
;
2190 else if (strcmp (arg
, "-s") == 0)
2192 expecting_sec_name
= 1;
2193 expecting_sec_addr
= 1;
2198 if (expecting_sec_name
)
2200 sect_opts
[section_index
].name
= arg
;
2201 expecting_sec_name
= 0;
2204 if (expecting_sec_addr
)
2206 sect_opts
[section_index
].value
= arg
;
2207 expecting_sec_addr
= 0;
2208 if (++section_index
>= num_sect_opts
)
2211 sect_opts
= ((struct sect_opt
*)
2212 xrealloc (sect_opts
,
2214 * sizeof (struct sect_opt
)));
2218 error (_("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*"));
2223 /* This command takes at least two arguments. The first one is a
2224 filename, and the second is the address where this file has been
2225 loaded. Abort now if this address hasn't been provided by the
2227 if (section_index
< 1)
2228 error (_("The address where %s has been loaded is missing"), filename
);
2230 /* Print the prompt for the query below. And save the arguments into
2231 a sect_addr_info structure to be passed around to other
2232 functions. We have to split this up into separate print
2233 statements because hex_string returns a local static
2236 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename
);
2237 section_addrs
= alloc_section_addr_info (section_index
);
2238 make_cleanup (xfree
, section_addrs
);
2239 for (i
= 0; i
< section_index
; i
++)
2242 char *val
= sect_opts
[i
].value
;
2243 char *sec
= sect_opts
[i
].name
;
2245 addr
= parse_and_eval_address (val
);
2247 /* Here we store the section offsets in the order they were
2248 entered on the command line. */
2249 section_addrs
->other
[sec_num
].name
= sec
;
2250 section_addrs
->other
[sec_num
].addr
= addr
;
2251 printf_unfiltered ("\t%s_addr = %s\n", sec
,
2252 paddress (gdbarch
, addr
));
2255 /* The object's sections are initialized when a
2256 call is made to build_objfile_section_table (objfile).
2257 This happens in reread_symbols.
2258 At this point, we don't know what file type this is,
2259 so we can't determine what section names are valid. */
2262 if (from_tty
&& (!query ("%s", "")))
2263 error (_("Not confirmed."));
2265 symbol_file_add (filename
, from_tty
? SYMFILE_VERBOSE
: 0,
2266 section_addrs
, flags
);
2268 /* Getting new symbols may change our opinion about what is
2270 reinit_frame_cache ();
2271 do_cleanups (my_cleanups
);
2275 /* Re-read symbols if a symbol-file has changed. */
2277 reread_symbols (void)
2279 struct objfile
*objfile
;
2282 struct stat new_statbuf
;
2285 /* With the addition of shared libraries, this should be modified,
2286 the load time should be saved in the partial symbol tables, since
2287 different tables may come from different source files. FIXME.
2288 This routine should then walk down each partial symbol table
2289 and see if the symbol table that it originates from has been changed */
2291 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2293 /* solib-sunos.c creates one objfile with obfd. */
2294 if (objfile
->obfd
== NULL
)
2297 /* Separate debug objfiles are handled in the main objfile. */
2298 if (objfile
->separate_debug_objfile_backlink
)
2301 /* If this object is from an archive (what you usually create with
2302 `ar', often called a `static library' on most systems, though
2303 a `shared library' on AIX is also an archive), then you should
2304 stat on the archive name, not member name. */
2305 if (objfile
->obfd
->my_archive
)
2306 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2308 res
= stat (objfile
->name
, &new_statbuf
);
2311 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2312 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2316 new_modtime
= new_statbuf
.st_mtime
;
2317 if (new_modtime
!= objfile
->mtime
)
2319 struct cleanup
*old_cleanups
;
2320 struct section_offsets
*offsets
;
2322 char *obfd_filename
;
2324 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2327 /* There are various functions like symbol_file_add,
2328 symfile_bfd_open, syms_from_objfile, etc., which might
2329 appear to do what we want. But they have various other
2330 effects which we *don't* want. So we just do stuff
2331 ourselves. We don't worry about mapped files (for one thing,
2332 any mapped file will be out of date). */
2334 /* If we get an error, blow away this objfile (not sure if
2335 that is the correct response for things like shared
2337 old_cleanups
= make_cleanup_free_objfile (objfile
);
2338 /* We need to do this whenever any symbols go away. */
2339 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2341 if (exec_bfd
!= NULL
&& strcmp (bfd_get_filename (objfile
->obfd
),
2342 bfd_get_filename (exec_bfd
)) == 0)
2344 /* Reload EXEC_BFD without asking anything. */
2346 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2349 /* Clean up any state BFD has sitting around. We don't need
2350 to close the descriptor but BFD lacks a way of closing the
2351 BFD without closing the descriptor. */
2352 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2353 if (!bfd_close (objfile
->obfd
))
2354 error (_("Can't close BFD for %s: %s"), objfile
->name
,
2355 bfd_errmsg (bfd_get_error ()));
2356 objfile
->obfd
= bfd_open_maybe_remote (obfd_filename
);
2357 if (objfile
->obfd
== NULL
)
2358 error (_("Can't open %s to read symbols."), objfile
->name
);
2360 objfile
->obfd
= gdb_bfd_ref (objfile
->obfd
);
2361 /* bfd_openr sets cacheable to true, which is what we want. */
2362 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2363 error (_("Can't read symbols from %s: %s."), objfile
->name
,
2364 bfd_errmsg (bfd_get_error ()));
2366 /* Save the offsets, we will nuke them with the rest of the
2368 num_offsets
= objfile
->num_sections
;
2369 offsets
= ((struct section_offsets
*)
2370 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2371 memcpy (offsets
, objfile
->section_offsets
,
2372 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2374 /* Remove any references to this objfile in the global
2376 preserve_values (objfile
);
2378 /* Nuke all the state that we will re-read. Much of the following
2379 code which sets things to NULL really is necessary to tell
2380 other parts of GDB that there is nothing currently there.
2382 Try to keep the freeing order compatible with free_objfile. */
2384 if (objfile
->sf
!= NULL
)
2386 (*objfile
->sf
->sym_finish
) (objfile
);
2389 clear_objfile_data (objfile
);
2391 /* Free the separate debug objfiles. It will be
2392 automatically recreated by sym_read. */
2393 free_objfile_separate_debug (objfile
);
2395 /* FIXME: Do we have to free a whole linked list, or is this
2397 if (objfile
->global_psymbols
.list
)
2398 xfree (objfile
->global_psymbols
.list
);
2399 memset (&objfile
->global_psymbols
, 0,
2400 sizeof (objfile
->global_psymbols
));
2401 if (objfile
->static_psymbols
.list
)
2402 xfree (objfile
->static_psymbols
.list
);
2403 memset (&objfile
->static_psymbols
, 0,
2404 sizeof (objfile
->static_psymbols
));
2406 /* Free the obstacks for non-reusable objfiles */
2407 bcache_xfree (objfile
->psymbol_cache
);
2408 objfile
->psymbol_cache
= bcache_xmalloc ();
2409 bcache_xfree (objfile
->macro_cache
);
2410 objfile
->macro_cache
= bcache_xmalloc ();
2411 bcache_xfree (objfile
->filename_cache
);
2412 objfile
->filename_cache
= bcache_xmalloc ();
2413 if (objfile
->demangled_names_hash
!= NULL
)
2415 htab_delete (objfile
->demangled_names_hash
);
2416 objfile
->demangled_names_hash
= NULL
;
2418 obstack_free (&objfile
->objfile_obstack
, 0);
2419 objfile
->sections
= NULL
;
2420 objfile
->symtabs
= NULL
;
2421 objfile
->psymtabs
= NULL
;
2422 objfile
->psymtabs_addrmap
= NULL
;
2423 objfile
->free_psymtabs
= NULL
;
2424 objfile
->cp_namespace_symtab
= NULL
;
2425 objfile
->msymbols
= NULL
;
2426 objfile
->deprecated_sym_private
= NULL
;
2427 objfile
->minimal_symbol_count
= 0;
2428 memset (&objfile
->msymbol_hash
, 0,
2429 sizeof (objfile
->msymbol_hash
));
2430 memset (&objfile
->msymbol_demangled_hash
, 0,
2431 sizeof (objfile
->msymbol_demangled_hash
));
2433 objfile
->psymbol_cache
= bcache_xmalloc ();
2434 objfile
->macro_cache
= bcache_xmalloc ();
2435 objfile
->filename_cache
= bcache_xmalloc ();
2436 /* obstack_init also initializes the obstack so it is
2437 empty. We could use obstack_specify_allocation but
2438 gdb_obstack.h specifies the alloc/dealloc
2440 obstack_init (&objfile
->objfile_obstack
);
2441 if (build_objfile_section_table (objfile
))
2443 error (_("Can't find the file sections in `%s': %s"),
2444 objfile
->name
, bfd_errmsg (bfd_get_error ()));
2446 terminate_minimal_symbol_table (objfile
);
2448 /* We use the same section offsets as from last time. I'm not
2449 sure whether that is always correct for shared libraries. */
2450 objfile
->section_offsets
= (struct section_offsets
*)
2451 obstack_alloc (&objfile
->objfile_obstack
,
2452 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2453 memcpy (objfile
->section_offsets
, offsets
,
2454 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2455 objfile
->num_sections
= num_offsets
;
2457 /* What the hell is sym_new_init for, anyway? The concept of
2458 distinguishing between the main file and additional files
2459 in this way seems rather dubious. */
2460 if (objfile
== symfile_objfile
)
2462 (*objfile
->sf
->sym_new_init
) (objfile
);
2465 (*objfile
->sf
->sym_init
) (objfile
);
2466 clear_complaints (&symfile_complaints
, 1, 1);
2467 /* Do not set flags as this is safe and we don't want to be
2469 (*objfile
->sf
->sym_read
) (objfile
, 0);
2470 if (!objfile_has_symbols (objfile
))
2473 printf_unfiltered (_("(no debugging symbols found)\n"));
2477 /* We're done reading the symbol file; finish off complaints. */
2478 clear_complaints (&symfile_complaints
, 0, 1);
2480 /* Getting new symbols may change our opinion about what is
2483 reinit_frame_cache ();
2485 /* Discard cleanups as symbol reading was successful. */
2486 discard_cleanups (old_cleanups
);
2488 /* If the mtime has changed between the time we set new_modtime
2489 and now, we *want* this to be out of date, so don't call stat
2491 objfile
->mtime
= new_modtime
;
2493 init_entry_point_info (objfile
);
2499 /* Notify objfiles that we've modified objfile sections. */
2500 objfiles_changed ();
2502 clear_symtab_users ();
2503 /* At least one objfile has changed, so we can consider that
2504 the executable we're debugging has changed too. */
2505 observer_notify_executable_changed ();
2518 static filename_language
*filename_language_table
;
2519 static int fl_table_size
, fl_table_next
;
2522 add_filename_language (char *ext
, enum language lang
)
2524 if (fl_table_next
>= fl_table_size
)
2526 fl_table_size
+= 10;
2527 filename_language_table
=
2528 xrealloc (filename_language_table
,
2529 fl_table_size
* sizeof (*filename_language_table
));
2532 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2533 filename_language_table
[fl_table_next
].lang
= lang
;
2537 static char *ext_args
;
2539 show_ext_args (struct ui_file
*file
, int from_tty
,
2540 struct cmd_list_element
*c
, const char *value
)
2542 fprintf_filtered (file
, _("\
2543 Mapping between filename extension and source language is \"%s\".\n"),
2548 set_ext_lang_command (char *args
, int from_tty
, struct cmd_list_element
*e
)
2551 char *cp
= ext_args
;
2554 /* First arg is filename extension, starting with '.' */
2556 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2558 /* Find end of first arg. */
2559 while (*cp
&& !isspace (*cp
))
2563 error (_("'%s': two arguments required -- filename extension and language"),
2566 /* Null-terminate first arg */
2569 /* Find beginning of second arg, which should be a source language. */
2570 while (*cp
&& isspace (*cp
))
2574 error (_("'%s': two arguments required -- filename extension and language"),
2577 /* Lookup the language from among those we know. */
2578 lang
= language_enum (cp
);
2580 /* Now lookup the filename extension: do we already know it? */
2581 for (i
= 0; i
< fl_table_next
; i
++)
2582 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2585 if (i
>= fl_table_next
)
2587 /* new file extension */
2588 add_filename_language (ext_args
, lang
);
2592 /* redefining a previously known filename extension */
2595 /* query ("Really make files of type %s '%s'?", */
2596 /* ext_args, language_str (lang)); */
2598 xfree (filename_language_table
[i
].ext
);
2599 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2600 filename_language_table
[i
].lang
= lang
;
2605 info_ext_lang_command (char *args
, int from_tty
)
2609 printf_filtered (_("Filename extensions and the languages they represent:"));
2610 printf_filtered ("\n\n");
2611 for (i
= 0; i
< fl_table_next
; i
++)
2612 printf_filtered ("\t%s\t- %s\n",
2613 filename_language_table
[i
].ext
,
2614 language_str (filename_language_table
[i
].lang
));
2618 init_filename_language_table (void)
2620 if (fl_table_size
== 0) /* protect against repetition */
2624 filename_language_table
=
2625 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
2626 add_filename_language (".c", language_c
);
2627 add_filename_language (".d", language_d
);
2628 add_filename_language (".C", language_cplus
);
2629 add_filename_language (".cc", language_cplus
);
2630 add_filename_language (".cp", language_cplus
);
2631 add_filename_language (".cpp", language_cplus
);
2632 add_filename_language (".cxx", language_cplus
);
2633 add_filename_language (".c++", language_cplus
);
2634 add_filename_language (".java", language_java
);
2635 add_filename_language (".class", language_java
);
2636 add_filename_language (".m", language_objc
);
2637 add_filename_language (".f", language_fortran
);
2638 add_filename_language (".F", language_fortran
);
2639 add_filename_language (".for", language_fortran
);
2640 add_filename_language (".FOR", language_fortran
);
2641 add_filename_language (".ftn", language_fortran
);
2642 add_filename_language (".FTN", language_fortran
);
2643 add_filename_language (".fpp", language_fortran
);
2644 add_filename_language (".FPP", language_fortran
);
2645 add_filename_language (".f90", language_fortran
);
2646 add_filename_language (".F90", language_fortran
);
2647 add_filename_language (".f95", language_fortran
);
2648 add_filename_language (".F95", language_fortran
);
2649 add_filename_language (".f03", language_fortran
);
2650 add_filename_language (".F03", language_fortran
);
2651 add_filename_language (".f08", language_fortran
);
2652 add_filename_language (".F08", language_fortran
);
2653 add_filename_language (".s", language_asm
);
2654 add_filename_language (".sx", language_asm
);
2655 add_filename_language (".S", language_asm
);
2656 add_filename_language (".pas", language_pascal
);
2657 add_filename_language (".p", language_pascal
);
2658 add_filename_language (".pp", language_pascal
);
2659 add_filename_language (".adb", language_ada
);
2660 add_filename_language (".ads", language_ada
);
2661 add_filename_language (".a", language_ada
);
2662 add_filename_language (".ada", language_ada
);
2663 add_filename_language (".dg", language_ada
);
2668 deduce_language_from_filename (char *filename
)
2673 if (filename
!= NULL
)
2674 if ((cp
= strrchr (filename
, '.')) != NULL
)
2675 for (i
= 0; i
< fl_table_next
; i
++)
2676 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2677 return filename_language_table
[i
].lang
;
2679 return language_unknown
;
2684 Allocate and partly initialize a new symbol table. Return a pointer
2685 to it. error() if no space.
2687 Caller must set these fields:
2696 allocate_symtab (char *filename
, struct objfile
*objfile
)
2698 struct symtab
*symtab
;
2700 symtab
= (struct symtab
*)
2701 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symtab
));
2702 memset (symtab
, 0, sizeof (*symtab
));
2703 symtab
->filename
= (char *) bcache (filename
, strlen (filename
) + 1,
2704 objfile
->filename_cache
);
2705 symtab
->fullname
= NULL
;
2706 symtab
->language
= deduce_language_from_filename (filename
);
2707 symtab
->debugformat
= "unknown";
2709 /* Hook it to the objfile it comes from */
2711 symtab
->objfile
= objfile
;
2712 symtab
->next
= objfile
->symtabs
;
2713 objfile
->symtabs
= symtab
;
2719 /* Reset all data structures in gdb which may contain references to symbol
2723 clear_symtab_users (void)
2725 /* Someday, we should do better than this, by only blowing away
2726 the things that really need to be blown. */
2728 /* Clear the "current" symtab first, because it is no longer valid.
2729 breakpoint_re_set may try to access the current symtab. */
2730 clear_current_source_symtab_and_line ();
2733 breakpoint_re_set ();
2734 set_default_breakpoint (0, NULL
, 0, 0, 0);
2735 clear_pc_function_cache ();
2736 observer_notify_new_objfile (NULL
);
2738 /* Clear globals which might have pointed into a removed objfile.
2739 FIXME: It's not clear which of these are supposed to persist
2740 between expressions and which ought to be reset each time. */
2741 expression_context_block
= NULL
;
2742 innermost_block
= NULL
;
2744 /* Varobj may refer to old symbols, perform a cleanup. */
2745 varobj_invalidate ();
2750 clear_symtab_users_cleanup (void *ignore
)
2752 clear_symtab_users ();
2756 The following code implements an abstraction for debugging overlay sections.
2758 The target model is as follows:
2759 1) The gnu linker will permit multiple sections to be mapped into the
2760 same VMA, each with its own unique LMA (or load address).
2761 2) It is assumed that some runtime mechanism exists for mapping the
2762 sections, one by one, from the load address into the VMA address.
2763 3) This code provides a mechanism for gdb to keep track of which
2764 sections should be considered to be mapped from the VMA to the LMA.
2765 This information is used for symbol lookup, and memory read/write.
2766 For instance, if a section has been mapped then its contents
2767 should be read from the VMA, otherwise from the LMA.
2769 Two levels of debugger support for overlays are available. One is
2770 "manual", in which the debugger relies on the user to tell it which
2771 overlays are currently mapped. This level of support is
2772 implemented entirely in the core debugger, and the information about
2773 whether a section is mapped is kept in the objfile->obj_section table.
2775 The second level of support is "automatic", and is only available if
2776 the target-specific code provides functionality to read the target's
2777 overlay mapping table, and translate its contents for the debugger
2778 (by updating the mapped state information in the obj_section tables).
2780 The interface is as follows:
2782 overlay map <name> -- tell gdb to consider this section mapped
2783 overlay unmap <name> -- tell gdb to consider this section unmapped
2784 overlay list -- list the sections that GDB thinks are mapped
2785 overlay read-target -- get the target's state of what's mapped
2786 overlay off/manual/auto -- set overlay debugging state
2787 Functional interface:
2788 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2789 section, return that section.
2790 find_pc_overlay(pc): find any overlay section that contains
2791 the pc, either in its VMA or its LMA
2792 section_is_mapped(sect): true if overlay is marked as mapped
2793 section_is_overlay(sect): true if section's VMA != LMA
2794 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2795 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2796 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2797 overlay_mapped_address(...): map an address from section's LMA to VMA
2798 overlay_unmapped_address(...): map an address from section's VMA to LMA
2799 symbol_overlayed_address(...): Return a "current" address for symbol:
2800 either in VMA or LMA depending on whether
2801 the symbol's section is currently mapped
2804 /* Overlay debugging state: */
2806 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2807 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
2809 /* Function: section_is_overlay (SECTION)
2810 Returns true if SECTION has VMA not equal to LMA, ie.
2811 SECTION is loaded at an address different from where it will "run". */
2814 section_is_overlay (struct obj_section
*section
)
2816 if (overlay_debugging
&& section
)
2818 bfd
*abfd
= section
->objfile
->obfd
;
2819 asection
*bfd_section
= section
->the_bfd_section
;
2821 if (bfd_section_lma (abfd
, bfd_section
) != 0
2822 && bfd_section_lma (abfd
, bfd_section
)
2823 != bfd_section_vma (abfd
, bfd_section
))
2830 /* Function: overlay_invalidate_all (void)
2831 Invalidate the mapped state of all overlay sections (mark it as stale). */
2834 overlay_invalidate_all (void)
2836 struct objfile
*objfile
;
2837 struct obj_section
*sect
;
2839 ALL_OBJSECTIONS (objfile
, sect
)
2840 if (section_is_overlay (sect
))
2841 sect
->ovly_mapped
= -1;
2844 /* Function: section_is_mapped (SECTION)
2845 Returns true if section is an overlay, and is currently mapped.
2847 Access to the ovly_mapped flag is restricted to this function, so
2848 that we can do automatic update. If the global flag
2849 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2850 overlay_invalidate_all. If the mapped state of the particular
2851 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2854 section_is_mapped (struct obj_section
*osect
)
2856 struct gdbarch
*gdbarch
;
2858 if (osect
== 0 || !section_is_overlay (osect
))
2861 switch (overlay_debugging
)
2865 return 0; /* overlay debugging off */
2866 case ovly_auto
: /* overlay debugging automatic */
2867 /* Unles there is a gdbarch_overlay_update function,
2868 there's really nothing useful to do here (can't really go auto) */
2869 gdbarch
= get_objfile_arch (osect
->objfile
);
2870 if (gdbarch_overlay_update_p (gdbarch
))
2872 if (overlay_cache_invalid
)
2874 overlay_invalidate_all ();
2875 overlay_cache_invalid
= 0;
2877 if (osect
->ovly_mapped
== -1)
2878 gdbarch_overlay_update (gdbarch
, osect
);
2880 /* fall thru to manual case */
2881 case ovly_on
: /* overlay debugging manual */
2882 return osect
->ovly_mapped
== 1;
2886 /* Function: pc_in_unmapped_range
2887 If PC falls into the lma range of SECTION, return true, else false. */
2890 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
2892 if (section_is_overlay (section
))
2894 bfd
*abfd
= section
->objfile
->obfd
;
2895 asection
*bfd_section
= section
->the_bfd_section
;
2897 /* We assume the LMA is relocated by the same offset as the VMA. */
2898 bfd_vma size
= bfd_get_section_size (bfd_section
);
2899 CORE_ADDR offset
= obj_section_offset (section
);
2901 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
2902 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
2909 /* Function: pc_in_mapped_range
2910 If PC falls into the vma range of SECTION, return true, else false. */
2913 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
2915 if (section_is_overlay (section
))
2917 if (obj_section_addr (section
) <= pc
2918 && pc
< obj_section_endaddr (section
))
2926 /* Return true if the mapped ranges of sections A and B overlap, false
2929 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
2931 CORE_ADDR a_start
= obj_section_addr (a
);
2932 CORE_ADDR a_end
= obj_section_endaddr (a
);
2933 CORE_ADDR b_start
= obj_section_addr (b
);
2934 CORE_ADDR b_end
= obj_section_endaddr (b
);
2936 return (a_start
< b_end
&& b_start
< a_end
);
2939 /* Function: overlay_unmapped_address (PC, SECTION)
2940 Returns the address corresponding to PC in the unmapped (load) range.
2941 May be the same as PC. */
2944 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
2946 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
2948 bfd
*abfd
= section
->objfile
->obfd
;
2949 asection
*bfd_section
= section
->the_bfd_section
;
2951 return pc
+ bfd_section_lma (abfd
, bfd_section
)
2952 - bfd_section_vma (abfd
, bfd_section
);
2958 /* Function: overlay_mapped_address (PC, SECTION)
2959 Returns the address corresponding to PC in the mapped (runtime) range.
2960 May be the same as PC. */
2963 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
2965 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
2967 bfd
*abfd
= section
->objfile
->obfd
;
2968 asection
*bfd_section
= section
->the_bfd_section
;
2970 return pc
+ bfd_section_vma (abfd
, bfd_section
)
2971 - bfd_section_lma (abfd
, bfd_section
);
2978 /* Function: symbol_overlayed_address
2979 Return one of two addresses (relative to the VMA or to the LMA),
2980 depending on whether the section is mapped or not. */
2983 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
2985 if (overlay_debugging
)
2987 /* If the symbol has no section, just return its regular address. */
2990 /* If the symbol's section is not an overlay, just return its address */
2991 if (!section_is_overlay (section
))
2993 /* If the symbol's section is mapped, just return its address */
2994 if (section_is_mapped (section
))
2997 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
2998 * then return its LOADED address rather than its vma address!!
3000 return overlay_unmapped_address (address
, section
);
3005 /* Function: find_pc_overlay (PC)
3006 Return the best-match overlay section for PC:
3007 If PC matches a mapped overlay section's VMA, return that section.
3008 Else if PC matches an unmapped section's VMA, return that section.
3009 Else if PC matches an unmapped section's LMA, return that section. */
3011 struct obj_section
*
3012 find_pc_overlay (CORE_ADDR pc
)
3014 struct objfile
*objfile
;
3015 struct obj_section
*osect
, *best_match
= NULL
;
3017 if (overlay_debugging
)
3018 ALL_OBJSECTIONS (objfile
, osect
)
3019 if (section_is_overlay (osect
))
3021 if (pc_in_mapped_range (pc
, osect
))
3023 if (section_is_mapped (osect
))
3028 else if (pc_in_unmapped_range (pc
, osect
))
3034 /* Function: find_pc_mapped_section (PC)
3035 If PC falls into the VMA address range of an overlay section that is
3036 currently marked as MAPPED, return that section. Else return NULL. */
3038 struct obj_section
*
3039 find_pc_mapped_section (CORE_ADDR pc
)
3041 struct objfile
*objfile
;
3042 struct obj_section
*osect
;
3044 if (overlay_debugging
)
3045 ALL_OBJSECTIONS (objfile
, osect
)
3046 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3052 /* Function: list_overlays_command
3053 Print a list of mapped sections and their PC ranges */
3056 list_overlays_command (char *args
, int from_tty
)
3059 struct objfile
*objfile
;
3060 struct obj_section
*osect
;
3062 if (overlay_debugging
)
3063 ALL_OBJSECTIONS (objfile
, osect
)
3064 if (section_is_mapped (osect
))
3066 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3071 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3072 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3073 size
= bfd_get_section_size (osect
->the_bfd_section
);
3074 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3076 printf_filtered ("Section %s, loaded at ", name
);
3077 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3078 puts_filtered (" - ");
3079 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3080 printf_filtered (", mapped at ");
3081 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3082 puts_filtered (" - ");
3083 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3084 puts_filtered ("\n");
3089 printf_filtered (_("No sections are mapped.\n"));
3092 /* Function: map_overlay_command
3093 Mark the named section as mapped (ie. residing at its VMA address). */
3096 map_overlay_command (char *args
, int from_tty
)
3098 struct objfile
*objfile
, *objfile2
;
3099 struct obj_section
*sec
, *sec2
;
3101 if (!overlay_debugging
)
3103 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3104 the 'overlay manual' command."));
3106 if (args
== 0 || *args
== 0)
3107 error (_("Argument required: name of an overlay section"));
3109 /* First, find a section matching the user supplied argument */
3110 ALL_OBJSECTIONS (objfile
, sec
)
3111 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3113 /* Now, check to see if the section is an overlay. */
3114 if (!section_is_overlay (sec
))
3115 continue; /* not an overlay section */
3117 /* Mark the overlay as "mapped" */
3118 sec
->ovly_mapped
= 1;
3120 /* Next, make a pass and unmap any sections that are
3121 overlapped by this new section: */
3122 ALL_OBJSECTIONS (objfile2
, sec2
)
3123 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
, sec2
))
3126 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3127 bfd_section_name (objfile
->obfd
,
3128 sec2
->the_bfd_section
));
3129 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
3133 error (_("No overlay section called %s"), args
);
3136 /* Function: unmap_overlay_command
3137 Mark the overlay section as unmapped
3138 (ie. resident in its LMA address range, rather than the VMA range). */
3141 unmap_overlay_command (char *args
, int from_tty
)
3143 struct objfile
*objfile
;
3144 struct obj_section
*sec
;
3146 if (!overlay_debugging
)
3148 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3149 the 'overlay manual' command."));
3151 if (args
== 0 || *args
== 0)
3152 error (_("Argument required: name of an overlay section"));
3154 /* First, find a section matching the user supplied argument */
3155 ALL_OBJSECTIONS (objfile
, sec
)
3156 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3158 if (!sec
->ovly_mapped
)
3159 error (_("Section %s is not mapped"), args
);
3160 sec
->ovly_mapped
= 0;
3163 error (_("No overlay section called %s"), args
);
3166 /* Function: overlay_auto_command
3167 A utility command to turn on overlay debugging.
3168 Possibly this should be done via a set/show command. */
3171 overlay_auto_command (char *args
, int from_tty
)
3173 overlay_debugging
= ovly_auto
;
3174 enable_overlay_breakpoints ();
3176 printf_unfiltered (_("Automatic overlay debugging enabled."));
3179 /* Function: overlay_manual_command
3180 A utility command to turn on overlay debugging.
3181 Possibly this should be done via a set/show command. */
3184 overlay_manual_command (char *args
, int from_tty
)
3186 overlay_debugging
= ovly_on
;
3187 disable_overlay_breakpoints ();
3189 printf_unfiltered (_("Overlay debugging enabled."));
3192 /* Function: overlay_off_command
3193 A utility command to turn on overlay debugging.
3194 Possibly this should be done via a set/show command. */
3197 overlay_off_command (char *args
, int from_tty
)
3199 overlay_debugging
= ovly_off
;
3200 disable_overlay_breakpoints ();
3202 printf_unfiltered (_("Overlay debugging disabled."));
3206 overlay_load_command (char *args
, int from_tty
)
3208 struct gdbarch
*gdbarch
= get_current_arch ();
3210 if (gdbarch_overlay_update_p (gdbarch
))
3211 gdbarch_overlay_update (gdbarch
, NULL
);
3213 error (_("This target does not know how to read its overlay state."));
3216 /* Function: overlay_command
3217 A place-holder for a mis-typed command */
3219 /* Command list chain containing all defined "overlay" subcommands. */
3220 struct cmd_list_element
*overlaylist
;
3223 overlay_command (char *args
, int from_tty
)
3226 ("\"overlay\" must be followed by the name of an overlay command.\n");
3227 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3231 /* Target Overlays for the "Simplest" overlay manager:
3233 This is GDB's default target overlay layer. It works with the
3234 minimal overlay manager supplied as an example by Cygnus. The
3235 entry point is via a function pointer "gdbarch_overlay_update",
3236 so targets that use a different runtime overlay manager can
3237 substitute their own overlay_update function and take over the
3240 The overlay_update function pokes around in the target's data structures
3241 to see what overlays are mapped, and updates GDB's overlay mapping with
3244 In this simple implementation, the target data structures are as follows:
3245 unsigned _novlys; /# number of overlay sections #/
3246 unsigned _ovly_table[_novlys][4] = {
3247 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3248 {..., ..., ..., ...},
3250 unsigned _novly_regions; /# number of overlay regions #/
3251 unsigned _ovly_region_table[_novly_regions][3] = {
3252 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3255 These functions will attempt to update GDB's mappedness state in the
3256 symbol section table, based on the target's mappedness state.
3258 To do this, we keep a cached copy of the target's _ovly_table, and
3259 attempt to detect when the cached copy is invalidated. The main
3260 entry point is "simple_overlay_update(SECT), which looks up SECT in
3261 the cached table and re-reads only the entry for that section from
3262 the target (whenever possible).
3265 /* Cached, dynamically allocated copies of the target data structures: */
3266 static unsigned (*cache_ovly_table
)[4] = 0;
3268 static unsigned (*cache_ovly_region_table
)[3] = 0;
3270 static unsigned cache_novlys
= 0;
3272 static unsigned cache_novly_regions
= 0;
3274 static CORE_ADDR cache_ovly_table_base
= 0;
3276 static CORE_ADDR cache_ovly_region_table_base
= 0;
3280 VMA
, SIZE
, LMA
, MAPPED
3283 /* Throw away the cached copy of _ovly_table */
3285 simple_free_overlay_table (void)
3287 if (cache_ovly_table
)
3288 xfree (cache_ovly_table
);
3290 cache_ovly_table
= NULL
;
3291 cache_ovly_table_base
= 0;
3295 /* Throw away the cached copy of _ovly_region_table */
3297 simple_free_overlay_region_table (void)
3299 if (cache_ovly_region_table
)
3300 xfree (cache_ovly_region_table
);
3301 cache_novly_regions
= 0;
3302 cache_ovly_region_table
= NULL
;
3303 cache_ovly_region_table_base
= 0;
3307 /* Read an array of ints of size SIZE from the target into a local buffer.
3308 Convert to host order. int LEN is number of ints */
3310 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3311 int len
, int size
, enum bfd_endian byte_order
)
3313 /* FIXME (alloca): Not safe if array is very large. */
3314 gdb_byte
*buf
= alloca (len
* size
);
3317 read_memory (memaddr
, buf
, len
* size
);
3318 for (i
= 0; i
< len
; i
++)
3319 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3322 /* Find and grab a copy of the target _ovly_table
3323 (and _novlys, which is needed for the table's size) */
3325 simple_read_overlay_table (void)
3327 struct minimal_symbol
*novlys_msym
, *ovly_table_msym
;
3328 struct gdbarch
*gdbarch
;
3330 enum bfd_endian byte_order
;
3332 simple_free_overlay_table ();
3333 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3336 error (_("Error reading inferior's overlay table: "
3337 "couldn't find `_novlys' variable\n"
3338 "in inferior. Use `overlay manual' mode."));
3342 ovly_table_msym
= lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3343 if (! ovly_table_msym
)
3345 error (_("Error reading inferior's overlay table: couldn't find "
3346 "`_ovly_table' array\n"
3347 "in inferior. Use `overlay manual' mode."));
3351 gdbarch
= get_objfile_arch (msymbol_objfile (ovly_table_msym
));
3352 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3353 byte_order
= gdbarch_byte_order (gdbarch
);
3355 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
),
3358 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3359 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3360 read_target_long_array (cache_ovly_table_base
,
3361 (unsigned int *) cache_ovly_table
,
3362 cache_novlys
* 4, word_size
, byte_order
);
3364 return 1; /* SUCCESS */
3368 /* Find and grab a copy of the target _ovly_region_table
3369 (and _novly_regions, which is needed for the table's size) */
3371 simple_read_overlay_region_table (void)
3373 struct minimal_symbol
*msym
;
3374 struct gdbarch
*gdbarch
;
3376 enum bfd_endian byte_order
;
3378 simple_free_overlay_region_table ();
3379 msym
= lookup_minimal_symbol ("_novly_regions", NULL
, NULL
);
3381 return 0; /* failure */
3383 gdbarch
= get_objfile_arch (msymbol_objfile (msym
));
3384 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3385 byte_order
= gdbarch_byte_order (gdbarch
);
3387 cache_novly_regions
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
),
3390 cache_ovly_region_table
= (void *) xmalloc (cache_novly_regions
* 12);
3391 if (cache_ovly_region_table
!= NULL
)
3393 msym
= lookup_minimal_symbol ("_ovly_region_table", NULL
, NULL
);
3396 cache_ovly_region_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3397 read_target_long_array (cache_ovly_region_table_base
,
3398 (unsigned int *) cache_ovly_region_table
,
3399 cache_novly_regions
* 3,
3400 word_size
, byte_order
);
3403 return 0; /* failure */
3406 return 0; /* failure */
3407 return 1; /* SUCCESS */
3411 /* Function: simple_overlay_update_1
3412 A helper function for simple_overlay_update. Assuming a cached copy
3413 of _ovly_table exists, look through it to find an entry whose vma,
3414 lma and size match those of OSECT. Re-read the entry and make sure
3415 it still matches OSECT (else the table may no longer be valid).
3416 Set OSECT's mapped state to match the entry. Return: 1 for
3417 success, 0 for failure. */
3420 simple_overlay_update_1 (struct obj_section
*osect
)
3423 bfd
*obfd
= osect
->objfile
->obfd
;
3424 asection
*bsect
= osect
->the_bfd_section
;
3425 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3426 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3427 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3429 size
= bfd_get_section_size (osect
->the_bfd_section
);
3430 for (i
= 0; i
< cache_novlys
; i
++)
3431 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3432 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3433 /* && cache_ovly_table[i][SIZE] == size */ )
3435 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3436 (unsigned int *) cache_ovly_table
[i
],
3437 4, word_size
, byte_order
);
3438 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3439 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3440 /* && cache_ovly_table[i][SIZE] == size */ )
3442 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3445 else /* Warning! Warning! Target's ovly table has changed! */
3451 /* Function: simple_overlay_update
3452 If OSECT is NULL, then update all sections' mapped state
3453 (after re-reading the entire target _ovly_table).
3454 If OSECT is non-NULL, then try to find a matching entry in the
3455 cached ovly_table and update only OSECT's mapped state.
3456 If a cached entry can't be found or the cache isn't valid, then
3457 re-read the entire cache, and go ahead and update all sections. */
3460 simple_overlay_update (struct obj_section
*osect
)
3462 struct objfile
*objfile
;
3464 /* Were we given an osect to look up? NULL means do all of them. */
3466 /* Have we got a cached copy of the target's overlay table? */
3467 if (cache_ovly_table
!= NULL
)
3468 /* Does its cached location match what's currently in the symtab? */
3469 if (cache_ovly_table_base
==
3470 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL
, NULL
)))
3471 /* Then go ahead and try to look up this single section in the cache */
3472 if (simple_overlay_update_1 (osect
))
3473 /* Found it! We're done. */
3476 /* Cached table no good: need to read the entire table anew.
3477 Or else we want all the sections, in which case it's actually
3478 more efficient to read the whole table in one block anyway. */
3480 if (! simple_read_overlay_table ())
3483 /* Now may as well update all sections, even if only one was requested. */
3484 ALL_OBJSECTIONS (objfile
, osect
)
3485 if (section_is_overlay (osect
))
3488 bfd
*obfd
= osect
->objfile
->obfd
;
3489 asection
*bsect
= osect
->the_bfd_section
;
3491 size
= bfd_get_section_size (bsect
);
3492 for (i
= 0; i
< cache_novlys
; i
++)
3493 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3494 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3495 /* && cache_ovly_table[i][SIZE] == size */ )
3496 { /* obj_section matches i'th entry in ovly_table */
3497 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3498 break; /* finished with inner for loop: break out */
3503 /* Set the output sections and output offsets for section SECTP in
3504 ABFD. The relocation code in BFD will read these offsets, so we
3505 need to be sure they're initialized. We map each section to itself,
3506 with no offset; this means that SECTP->vma will be honored. */
3509 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3511 sectp
->output_section
= sectp
;
3512 sectp
->output_offset
= 0;
3515 /* Default implementation for sym_relocate. */
3519 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3522 bfd
*abfd
= objfile
->obfd
;
3524 /* We're only interested in sections with relocation
3526 if ((sectp
->flags
& SEC_RELOC
) == 0)
3529 /* We will handle section offsets properly elsewhere, so relocate as if
3530 all sections begin at 0. */
3531 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3533 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3536 /* Relocate the contents of a debug section SECTP in ABFD. The
3537 contents are stored in BUF if it is non-NULL, or returned in a
3538 malloc'd buffer otherwise.
3540 For some platforms and debug info formats, shared libraries contain
3541 relocations against the debug sections (particularly for DWARF-2;
3542 one affected platform is PowerPC GNU/Linux, although it depends on
3543 the version of the linker in use). Also, ELF object files naturally
3544 have unresolved relocations for their debug sections. We need to apply
3545 the relocations in order to get the locations of symbols correct.
3546 Another example that may require relocation processing, is the
3547 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3551 symfile_relocate_debug_section (struct objfile
*objfile
,
3552 asection
*sectp
, bfd_byte
*buf
)
3554 gdb_assert (objfile
->sf
->sym_relocate
);
3556 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3559 struct symfile_segment_data
*
3560 get_symfile_segment_data (bfd
*abfd
)
3562 struct sym_fns
*sf
= find_sym_fns (abfd
);
3567 return sf
->sym_segments (abfd
);
3571 free_symfile_segment_data (struct symfile_segment_data
*data
)
3573 xfree (data
->segment_bases
);
3574 xfree (data
->segment_sizes
);
3575 xfree (data
->segment_info
);
3581 - DATA, containing segment addresses from the object file ABFD, and
3582 the mapping from ABFD's sections onto the segments that own them,
3584 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3585 segment addresses reported by the target,
3586 store the appropriate offsets for each section in OFFSETS.
3588 If there are fewer entries in SEGMENT_BASES than there are segments
3589 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3591 If there are more entries, then ignore the extra. The target may
3592 not be able to distinguish between an empty data segment and a
3593 missing data segment; a missing text segment is less plausible. */
3595 symfile_map_offsets_to_segments (bfd
*abfd
, struct symfile_segment_data
*data
,
3596 struct section_offsets
*offsets
,
3597 int num_segment_bases
,
3598 const CORE_ADDR
*segment_bases
)
3603 /* It doesn't make sense to call this function unless you have some
3604 segment base addresses. */
3605 gdb_assert (num_segment_bases
> 0);
3607 /* If we do not have segment mappings for the object file, we
3608 can not relocate it by segments. */
3609 gdb_assert (data
!= NULL
);
3610 gdb_assert (data
->num_segments
> 0);
3612 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3614 int which
= data
->segment_info
[i
];
3616 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
3618 /* Don't bother computing offsets for sections that aren't
3619 loaded as part of any segment. */
3623 /* Use the last SEGMENT_BASES entry as the address of any extra
3624 segments mentioned in DATA->segment_info. */
3625 if (which
> num_segment_bases
)
3626 which
= num_segment_bases
;
3628 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
3629 - data
->segment_bases
[which
- 1]);
3636 symfile_find_segment_sections (struct objfile
*objfile
)
3638 bfd
*abfd
= objfile
->obfd
;
3641 struct symfile_segment_data
*data
;
3643 data
= get_symfile_segment_data (objfile
->obfd
);
3647 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
3649 free_symfile_segment_data (data
);
3653 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3655 int which
= data
->segment_info
[i
];
3659 if (objfile
->sect_index_text
== -1)
3660 objfile
->sect_index_text
= sect
->index
;
3662 if (objfile
->sect_index_rodata
== -1)
3663 objfile
->sect_index_rodata
= sect
->index
;
3665 else if (which
== 2)
3667 if (objfile
->sect_index_data
== -1)
3668 objfile
->sect_index_data
= sect
->index
;
3670 if (objfile
->sect_index_bss
== -1)
3671 objfile
->sect_index_bss
= sect
->index
;
3675 free_symfile_segment_data (data
);
3679 _initialize_symfile (void)
3681 struct cmd_list_element
*c
;
3683 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3684 Load symbol table from executable file FILE.\n\
3685 The `file' command can also load symbol tables, as well as setting the file\n\
3686 to execute."), &cmdlist
);
3687 set_cmd_completer (c
, filename_completer
);
3689 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3690 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3691 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3692 ADDR is the starting address of the file's text.\n\
3693 The optional arguments are section-name section-address pairs and\n\
3694 should be specified if the data and bss segments are not contiguous\n\
3695 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3697 set_cmd_completer (c
, filename_completer
);
3699 c
= add_cmd ("load", class_files
, load_command
, _("\
3700 Dynamically load FILE into the running program, and record its symbols\n\
3701 for access from GDB.\n\
3702 A load OFFSET may also be given."), &cmdlist
);
3703 set_cmd_completer (c
, filename_completer
);
3705 add_setshow_boolean_cmd ("symbol-reloading", class_support
,
3706 &symbol_reloading
, _("\
3707 Set dynamic symbol table reloading multiple times in one run."), _("\
3708 Show dynamic symbol table reloading multiple times in one run."), NULL
,
3710 show_symbol_reloading
,
3711 &setlist
, &showlist
);
3713 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3714 _("Commands for debugging overlays."), &overlaylist
,
3715 "overlay ", 0, &cmdlist
);
3717 add_com_alias ("ovly", "overlay", class_alias
, 1);
3718 add_com_alias ("ov", "overlay", class_alias
, 1);
3720 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3721 _("Assert that an overlay section is mapped."), &overlaylist
);
3723 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3724 _("Assert that an overlay section is unmapped."), &overlaylist
);
3726 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3727 _("List mappings of overlay sections."), &overlaylist
);
3729 add_cmd ("manual", class_support
, overlay_manual_command
,
3730 _("Enable overlay debugging."), &overlaylist
);
3731 add_cmd ("off", class_support
, overlay_off_command
,
3732 _("Disable overlay debugging."), &overlaylist
);
3733 add_cmd ("auto", class_support
, overlay_auto_command
,
3734 _("Enable automatic overlay debugging."), &overlaylist
);
3735 add_cmd ("load-target", class_support
, overlay_load_command
,
3736 _("Read the overlay mapping state from the target."), &overlaylist
);
3738 /* Filename extension to source language lookup table: */
3739 init_filename_language_table ();
3740 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3742 Set mapping between filename extension and source language."), _("\
3743 Show mapping between filename extension and source language."), _("\
3744 Usage: set extension-language .foo bar"),
3745 set_ext_lang_command
,
3747 &setlist
, &showlist
);
3749 add_info ("extensions", info_ext_lang_command
,
3750 _("All filename extensions associated with a source language."));
3752 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3753 &debug_file_directory
, _("\
3754 Set the directories where separate debug symbols are searched for."), _("\
3755 Show the directories where separate debug symbols are searched for."), _("\
3756 Separate debug symbols are first searched for in the same\n\
3757 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3758 and lastly at the path of the directory of the binary with\n\
3759 each global debug-file-directory component prepended."),
3761 show_debug_file_directory
,
3762 &setlist
, &showlist
);