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
;
215 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
216 in the obstack pointed to by OBSTACKP. */
219 obconcat (struct obstack
*obstackp
, const char *s1
, const char *s2
,
222 int len
= strlen (s1
) + strlen (s2
) + strlen (s3
) + 1;
223 char *val
= (char *) obstack_alloc (obstackp
, len
);
230 /* True if we are reading a symbol table. */
232 int currently_reading_symtab
= 0;
235 decrement_reading_symtab (void *dummy
)
237 currently_reading_symtab
--;
240 /* Increment currently_reading_symtab and return a cleanup that can be
241 used to decrement it. */
243 increment_reading_symtab (void)
245 ++currently_reading_symtab
;
246 return make_cleanup (decrement_reading_symtab
, NULL
);
249 /* Remember the lowest-addressed loadable section we've seen.
250 This function is called via bfd_map_over_sections.
252 In case of equal vmas, the section with the largest size becomes the
253 lowest-addressed loadable section.
255 If the vmas and sizes are equal, the last section is considered the
256 lowest-addressed loadable section. */
259 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
261 asection
**lowest
= (asection
**) obj
;
263 if (0 == (bfd_get_section_flags (abfd
, sect
) & (SEC_ALLOC
| SEC_LOAD
)))
266 *lowest
= sect
; /* First loadable section */
267 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
268 *lowest
= sect
; /* A lower loadable section */
269 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
270 && (bfd_section_size (abfd
, (*lowest
))
271 <= bfd_section_size (abfd
, sect
)))
275 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
277 struct section_addr_info
*
278 alloc_section_addr_info (size_t num_sections
)
280 struct section_addr_info
*sap
;
283 size
= (sizeof (struct section_addr_info
)
284 + sizeof (struct other_sections
) * (num_sections
- 1));
285 sap
= (struct section_addr_info
*) xmalloc (size
);
286 memset (sap
, 0, size
);
287 sap
->num_sections
= num_sections
;
292 /* Build (allocate and populate) a section_addr_info struct from
293 an existing section table. */
295 extern struct section_addr_info
*
296 build_section_addr_info_from_section_table (const struct target_section
*start
,
297 const struct target_section
*end
)
299 struct section_addr_info
*sap
;
300 const struct target_section
*stp
;
303 sap
= alloc_section_addr_info (end
- start
);
305 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
307 if (bfd_get_section_flags (stp
->bfd
,
308 stp
->the_bfd_section
) & (SEC_ALLOC
| SEC_LOAD
)
309 && oidx
< end
- start
)
311 sap
->other
[oidx
].addr
= stp
->addr
;
312 sap
->other
[oidx
].name
313 = xstrdup (bfd_section_name (stp
->bfd
, stp
->the_bfd_section
));
314 sap
->other
[oidx
].sectindex
= stp
->the_bfd_section
->index
;
322 /* Create a section_addr_info from section offsets in ABFD. */
324 static struct section_addr_info
*
325 build_section_addr_info_from_bfd (bfd
*abfd
)
327 struct section_addr_info
*sap
;
329 struct bfd_section
*sec
;
331 sap
= alloc_section_addr_info (bfd_count_sections (abfd
));
332 for (i
= 0, sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
333 if (bfd_get_section_flags (abfd
, sec
) & (SEC_ALLOC
| SEC_LOAD
))
335 sap
->other
[i
].addr
= bfd_get_section_vma (abfd
, sec
);
336 sap
->other
[i
].name
= xstrdup (bfd_get_section_name (abfd
, sec
));
337 sap
->other
[i
].sectindex
= sec
->index
;
343 /* Create a section_addr_info from section offsets in OBJFILE. */
345 struct section_addr_info
*
346 build_section_addr_info_from_objfile (const struct objfile
*objfile
)
348 struct section_addr_info
*sap
;
351 /* Before reread_symbols gets rewritten it is not safe to call:
352 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
354 sap
= build_section_addr_info_from_bfd (objfile
->obfd
);
355 for (i
= 0; i
< sap
->num_sections
&& sap
->other
[i
].name
; i
++)
357 int sectindex
= sap
->other
[i
].sectindex
;
359 sap
->other
[i
].addr
+= objfile
->section_offsets
->offsets
[sectindex
];
364 /* Free all memory allocated by build_section_addr_info_from_section_table. */
367 free_section_addr_info (struct section_addr_info
*sap
)
371 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
372 if (sap
->other
[idx
].name
)
373 xfree (sap
->other
[idx
].name
);
378 /* Initialize OBJFILE's sect_index_* members. */
380 init_objfile_sect_indices (struct objfile
*objfile
)
385 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
387 objfile
->sect_index_text
= sect
->index
;
389 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
391 objfile
->sect_index_data
= sect
->index
;
393 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
395 objfile
->sect_index_bss
= sect
->index
;
397 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
399 objfile
->sect_index_rodata
= sect
->index
;
401 /* This is where things get really weird... We MUST have valid
402 indices for the various sect_index_* members or gdb will abort.
403 So if for example, there is no ".text" section, we have to
404 accomodate that. First, check for a file with the standard
405 one or two segments. */
407 symfile_find_segment_sections (objfile
);
409 /* Except when explicitly adding symbol files at some address,
410 section_offsets contains nothing but zeros, so it doesn't matter
411 which slot in section_offsets the individual sect_index_* members
412 index into. So if they are all zero, it is safe to just point
413 all the currently uninitialized indices to the first slot. But
414 beware: if this is the main executable, it may be relocated
415 later, e.g. by the remote qOffsets packet, and then this will
416 be wrong! That's why we try segments first. */
418 for (i
= 0; i
< objfile
->num_sections
; i
++)
420 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
425 if (i
== objfile
->num_sections
)
427 if (objfile
->sect_index_text
== -1)
428 objfile
->sect_index_text
= 0;
429 if (objfile
->sect_index_data
== -1)
430 objfile
->sect_index_data
= 0;
431 if (objfile
->sect_index_bss
== -1)
432 objfile
->sect_index_bss
= 0;
433 if (objfile
->sect_index_rodata
== -1)
434 objfile
->sect_index_rodata
= 0;
438 /* The arguments to place_section. */
440 struct place_section_arg
442 struct section_offsets
*offsets
;
446 /* Find a unique offset to use for loadable section SECT if
447 the user did not provide an offset. */
450 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
452 struct place_section_arg
*arg
= obj
;
453 CORE_ADDR
*offsets
= arg
->offsets
->offsets
, start_addr
;
455 ULONGEST align
= ((ULONGEST
) 1) << bfd_get_section_alignment (abfd
, sect
);
457 /* We are only interested in allocated sections. */
458 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
461 /* If the user specified an offset, honor it. */
462 if (offsets
[sect
->index
] != 0)
465 /* Otherwise, let's try to find a place for the section. */
466 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
473 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
475 int indx
= cur_sec
->index
;
476 CORE_ADDR cur_offset
;
478 /* We don't need to compare against ourself. */
482 /* We can only conflict with allocated sections. */
483 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
486 /* If the section offset is 0, either the section has not been placed
487 yet, or it was the lowest section placed (in which case LOWEST
488 will be past its end). */
489 if (offsets
[indx
] == 0)
492 /* If this section would overlap us, then we must move up. */
493 if (start_addr
+ bfd_get_section_size (sect
) > offsets
[indx
]
494 && start_addr
< offsets
[indx
] + bfd_get_section_size (cur_sec
))
496 start_addr
= offsets
[indx
] + bfd_get_section_size (cur_sec
);
497 start_addr
= (start_addr
+ align
- 1) & -align
;
502 /* Otherwise, we appear to be OK. So far. */
507 offsets
[sect
->index
] = start_addr
;
508 arg
->lowest
= start_addr
+ bfd_get_section_size (sect
);
511 /* Store struct section_addr_info as prepared (made relative and with SECTINDEX
512 filled-in) by addr_info_make_relative into SECTION_OFFSETS of NUM_SECTIONS
516 relative_addr_info_to_section_offsets (struct section_offsets
*section_offsets
,
518 struct section_addr_info
*addrs
)
522 memset (section_offsets
, 0, SIZEOF_N_SECTION_OFFSETS (num_sections
));
524 /* Now calculate offsets for section that were specified by the caller. */
525 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
527 struct other_sections
*osp
;
529 osp
= &addrs
->other
[i
];
533 /* Record all sections in offsets */
534 /* The section_offsets in the objfile are here filled in using
536 section_offsets
->offsets
[osp
->sectindex
] = osp
->addr
;
540 /* qsort comparator for addrs_section_sort. Sort entries in ascending order by
541 their (name, sectindex) pair. sectindex makes the sort by name stable. */
544 addrs_section_compar (const void *ap
, const void *bp
)
546 const struct other_sections
*a
= *((struct other_sections
**) ap
);
547 const struct other_sections
*b
= *((struct other_sections
**) bp
);
548 int retval
, a_idx
, b_idx
;
550 retval
= strcmp (a
->name
, b
->name
);
554 /* SECTINDEX is undefined iff ADDR is zero. */
555 a_idx
= a
->addr
== 0 ? 0 : a
->sectindex
;
556 b_idx
= b
->addr
== 0 ? 0 : b
->sectindex
;
557 return a_idx
- b_idx
;
560 /* Provide sorted array of pointers to sections of ADDRS. The array is
561 terminated by NULL. Caller is responsible to call xfree for it. */
563 static struct other_sections
**
564 addrs_section_sort (struct section_addr_info
*addrs
)
566 struct other_sections
**array
;
569 /* `+ 1' for the NULL terminator. */
570 array
= xmalloc (sizeof (*array
) * (addrs
->num_sections
+ 1));
571 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
572 array
[i
] = &addrs
->other
[i
];
575 qsort (array
, i
, sizeof (*array
), addrs_section_compar
);
580 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
581 also SECTINDEXes specific to ABFD there. This function can be used to
582 rebase ADDRS to start referencing different BFD than before. */
585 addr_info_make_relative (struct section_addr_info
*addrs
, bfd
*abfd
)
587 asection
*lower_sect
;
588 CORE_ADDR lower_offset
;
590 struct cleanup
*my_cleanup
;
591 struct section_addr_info
*abfd_addrs
;
592 struct other_sections
**addrs_sorted
, **abfd_addrs_sorted
;
593 struct other_sections
**addrs_to_abfd_addrs
;
595 /* Find lowest loadable section to be used as starting point for
596 continguous sections. */
598 bfd_map_over_sections (abfd
, find_lowest_section
, &lower_sect
);
599 if (lower_sect
== NULL
)
601 warning (_("no loadable sections found in added symbol-file %s"),
602 bfd_get_filename (abfd
));
606 lower_offset
= bfd_section_vma (bfd_get_filename (abfd
), lower_sect
);
608 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
609 in ABFD. Section names are not unique - there can be multiple sections of
610 the same name. Also the sections of the same name do not have to be
611 adjacent to each other. Some sections may be present only in one of the
612 files. Even sections present in both files do not have to be in the same
615 Use stable sort by name for the sections in both files. Then linearly
616 scan both lists matching as most of the entries as possible. */
618 addrs_sorted
= addrs_section_sort (addrs
);
619 my_cleanup
= make_cleanup (xfree
, addrs_sorted
);
621 abfd_addrs
= build_section_addr_info_from_bfd (abfd
);
622 make_cleanup_free_section_addr_info (abfd_addrs
);
623 abfd_addrs_sorted
= addrs_section_sort (abfd_addrs
);
624 make_cleanup (xfree
, abfd_addrs_sorted
);
626 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and ABFD_ADDRS_SORTED. */
628 addrs_to_abfd_addrs
= xzalloc (sizeof (*addrs_to_abfd_addrs
)
629 * addrs
->num_sections
);
630 make_cleanup (xfree
, addrs_to_abfd_addrs
);
632 while (*addrs_sorted
)
634 const char *sect_name
= (*addrs_sorted
)->name
;
636 while (*abfd_addrs_sorted
637 && strcmp ((*abfd_addrs_sorted
)->name
, sect_name
) < 0)
640 if (*abfd_addrs_sorted
641 && strcmp ((*abfd_addrs_sorted
)->name
, sect_name
) == 0)
645 /* Make the found item directly addressable from ADDRS. */
646 index_in_addrs
= *addrs_sorted
- addrs
->other
;
647 gdb_assert (addrs_to_abfd_addrs
[index_in_addrs
] == NULL
);
648 addrs_to_abfd_addrs
[index_in_addrs
] = *abfd_addrs_sorted
;
650 /* Never use the same ABFD entry twice. */
657 /* Calculate offsets for the loadable sections.
658 FIXME! Sections must be in order of increasing loadable section
659 so that contiguous sections can use the lower-offset!!!
661 Adjust offsets if the segments are not contiguous.
662 If the section is contiguous, its offset should be set to
663 the offset of the highest loadable section lower than it
664 (the loadable section directly below it in memory).
665 this_offset = lower_offset = lower_addr - lower_orig_addr */
667 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
669 const char *sect_name
= addrs
->other
[i
].name
;
670 struct other_sections
*sect
= addrs_to_abfd_addrs
[i
];
674 /* This is the index used by BFD. */
675 addrs
->other
[i
].sectindex
= sect
->sectindex
;
677 if (addrs
->other
[i
].addr
!= 0)
679 addrs
->other
[i
].addr
-= sect
->addr
;
680 lower_offset
= addrs
->other
[i
].addr
;
683 addrs
->other
[i
].addr
= lower_offset
;
687 /* This section does not exist in ABFD, which is normally
688 unexpected and we want to issue a warning.
690 However, the ELF prelinker does create a few sections which are
691 marked in the main executable as loadable (they are loaded in
692 memory from the DYNAMIC segment) and yet are not present in
693 separate debug info files. This is fine, and should not cause
694 a warning. Shared libraries contain just the section
695 ".gnu.liblist" but it is not marked as loadable there. There is
696 no other way to identify them than by their name as the sections
697 created by prelink have no special flags. */
699 if (!(strcmp (sect_name
, ".gnu.liblist") == 0
700 || strcmp (sect_name
, ".gnu.conflict") == 0
701 || strcmp (sect_name
, ".dynbss") == 0
702 || strcmp (sect_name
, ".sdynbss") == 0))
703 warning (_("section %s not found in %s"), sect_name
,
704 bfd_get_filename (abfd
));
706 addrs
->other
[i
].addr
= 0;
708 /* SECTINDEX is invalid if ADDR is zero. */
712 do_cleanups (my_cleanup
);
715 /* Parse the user's idea of an offset for dynamic linking, into our idea
716 of how to represent it for fast symbol reading. This is the default
717 version of the sym_fns.sym_offsets function for symbol readers that
718 don't need to do anything special. It allocates a section_offsets table
719 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
722 default_symfile_offsets (struct objfile
*objfile
,
723 struct section_addr_info
*addrs
)
725 objfile
->num_sections
= bfd_count_sections (objfile
->obfd
);
726 objfile
->section_offsets
= (struct section_offsets
*)
727 obstack_alloc (&objfile
->objfile_obstack
,
728 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
729 relative_addr_info_to_section_offsets (objfile
->section_offsets
,
730 objfile
->num_sections
, addrs
);
732 /* For relocatable files, all loadable sections will start at zero.
733 The zero is meaningless, so try to pick arbitrary addresses such
734 that no loadable sections overlap. This algorithm is quadratic,
735 but the number of sections in a single object file is generally
737 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
739 struct place_section_arg arg
;
740 bfd
*abfd
= objfile
->obfd
;
742 CORE_ADDR lowest
= 0;
744 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
745 /* We do not expect this to happen; just skip this step if the
746 relocatable file has a section with an assigned VMA. */
747 if (bfd_section_vma (abfd
, cur_sec
) != 0)
752 CORE_ADDR
*offsets
= objfile
->section_offsets
->offsets
;
754 /* Pick non-overlapping offsets for sections the user did not
756 arg
.offsets
= objfile
->section_offsets
;
758 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
760 /* Correctly filling in the section offsets is not quite
761 enough. Relocatable files have two properties that
762 (most) shared objects do not:
764 - Their debug information will contain relocations. Some
765 shared libraries do also, but many do not, so this can not
768 - If there are multiple code sections they will be loaded
769 at different relative addresses in memory than they are
770 in the objfile, since all sections in the file will start
773 Because GDB has very limited ability to map from an
774 address in debug info to the correct code section,
775 it relies on adding SECT_OFF_TEXT to things which might be
776 code. If we clear all the section offsets, and set the
777 section VMAs instead, then symfile_relocate_debug_section
778 will return meaningful debug information pointing at the
781 GDB has too many different data structures for section
782 addresses - a bfd, objfile, and so_list all have section
783 tables, as does exec_ops. Some of these could probably
786 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
787 cur_sec
= cur_sec
->next
)
789 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
792 bfd_set_section_vma (abfd
, cur_sec
, offsets
[cur_sec
->index
]);
793 exec_set_section_address (bfd_get_filename (abfd
), cur_sec
->index
,
794 offsets
[cur_sec
->index
]);
795 offsets
[cur_sec
->index
] = 0;
800 /* Remember the bfd indexes for the .text, .data, .bss and
802 init_objfile_sect_indices (objfile
);
806 /* Divide the file into segments, which are individual relocatable units.
807 This is the default version of the sym_fns.sym_segments function for
808 symbol readers that do not have an explicit representation of segments.
809 It assumes that object files do not have segments, and fully linked
810 files have a single segment. */
812 struct symfile_segment_data
*
813 default_symfile_segments (bfd
*abfd
)
817 struct symfile_segment_data
*data
;
820 /* Relocatable files contain enough information to position each
821 loadable section independently; they should not be relocated
823 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
826 /* Make sure there is at least one loadable section in the file. */
827 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
829 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
837 low
= bfd_get_section_vma (abfd
, sect
);
838 high
= low
+ bfd_get_section_size (sect
);
840 data
= XZALLOC (struct symfile_segment_data
);
841 data
->num_segments
= 1;
842 data
->segment_bases
= XCALLOC (1, CORE_ADDR
);
843 data
->segment_sizes
= XCALLOC (1, CORE_ADDR
);
845 num_sections
= bfd_count_sections (abfd
);
846 data
->segment_info
= XCALLOC (num_sections
, int);
848 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
852 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
855 vma
= bfd_get_section_vma (abfd
, sect
);
858 if (vma
+ bfd_get_section_size (sect
) > high
)
859 high
= vma
+ bfd_get_section_size (sect
);
861 data
->segment_info
[i
] = 1;
864 data
->segment_bases
[0] = low
;
865 data
->segment_sizes
[0] = high
- low
;
870 /* Process a symbol file, as either the main file or as a dynamically
873 OBJFILE is where the symbols are to be read from.
875 ADDRS is the list of section load addresses. If the user has given
876 an 'add-symbol-file' command, then this is the list of offsets and
877 addresses he or she provided as arguments to the command; or, if
878 we're handling a shared library, these are the actual addresses the
879 sections are loaded at, according to the inferior's dynamic linker
880 (as gleaned by GDB's shared library code). We convert each address
881 into an offset from the section VMA's as it appears in the object
882 file, and then call the file's sym_offsets function to convert this
883 into a format-specific offset table --- a `struct section_offsets'.
884 If ADDRS is non-zero, OFFSETS must be zero.
886 OFFSETS is a table of section offsets already in the right
887 format-specific representation. NUM_OFFSETS is the number of
888 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
889 assume this is the proper table the call to sym_offsets described
890 above would produce. Instead of calling sym_offsets, we just dump
891 it right into objfile->section_offsets. (When we're re-reading
892 symbols from an objfile, we don't have the original load address
893 list any more; all we have is the section offset table.) If
894 OFFSETS is non-zero, ADDRS must be zero.
896 ADD_FLAGS encodes verbosity level, whether this is main symbol or
897 an extra symbol file such as dynamically loaded code, and wether
898 breakpoint reset should be deferred. */
901 syms_from_objfile (struct objfile
*objfile
,
902 struct section_addr_info
*addrs
,
903 struct section_offsets
*offsets
,
907 struct section_addr_info
*local_addr
= NULL
;
908 struct cleanup
*old_chain
;
909 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
911 gdb_assert (! (addrs
&& offsets
));
913 init_entry_point_info (objfile
);
914 objfile
->sf
= find_sym_fns (objfile
->obfd
);
916 if (objfile
->sf
== NULL
)
917 return; /* No symbols. */
919 /* Make sure that partially constructed symbol tables will be cleaned up
920 if an error occurs during symbol reading. */
921 old_chain
= make_cleanup_free_objfile (objfile
);
923 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
924 list. We now establish the convention that an addr of zero means
925 no load address was specified. */
926 if (! addrs
&& ! offsets
)
929 = alloc_section_addr_info (bfd_count_sections (objfile
->obfd
));
930 make_cleanup (xfree
, local_addr
);
934 /* Now either addrs or offsets is non-zero. */
938 /* We will modify the main symbol table, make sure that all its users
939 will be cleaned up if an error occurs during symbol reading. */
940 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
942 /* Since no error yet, throw away the old symbol table. */
944 if (symfile_objfile
!= NULL
)
946 free_objfile (symfile_objfile
);
947 gdb_assert (symfile_objfile
== NULL
);
950 /* Currently we keep symbols from the add-symbol-file command.
951 If the user wants to get rid of them, they should do "symbol-file"
952 without arguments first. Not sure this is the best behavior
955 (*objfile
->sf
->sym_new_init
) (objfile
);
958 /* Convert addr into an offset rather than an absolute address.
959 We find the lowest address of a loaded segment in the objfile,
960 and assume that <addr> is where that got loaded.
962 We no longer warn if the lowest section is not a text segment (as
963 happens for the PA64 port. */
964 if (addrs
&& addrs
->other
[0].name
)
965 addr_info_make_relative (addrs
, objfile
->obfd
);
967 /* Initialize symbol reading routines for this objfile, allow complaints to
968 appear for this new file, and record how verbose to be, then do the
969 initial symbol reading for this file. */
971 (*objfile
->sf
->sym_init
) (objfile
);
972 clear_complaints (&symfile_complaints
, 1, add_flags
& SYMFILE_VERBOSE
);
975 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
978 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_offsets
);
980 /* Just copy in the offset table directly as given to us. */
981 objfile
->num_sections
= num_offsets
;
982 objfile
->section_offsets
983 = ((struct section_offsets
*)
984 obstack_alloc (&objfile
->objfile_obstack
, size
));
985 memcpy (objfile
->section_offsets
, offsets
, size
);
987 init_objfile_sect_indices (objfile
);
990 (*objfile
->sf
->sym_read
) (objfile
, add_flags
);
992 /* Discard cleanups as symbol reading was successful. */
994 discard_cleanups (old_chain
);
998 /* Perform required actions after either reading in the initial
999 symbols for a new objfile, or mapping in the symbols from a reusable
1003 new_symfile_objfile (struct objfile
*objfile
, int add_flags
)
1006 /* If this is the main symbol file we have to clean up all users of the
1007 old main symbol file. Otherwise it is sufficient to fixup all the
1008 breakpoints that may have been redefined by this symbol file. */
1009 if (add_flags
& SYMFILE_MAINLINE
)
1011 /* OK, make it the "real" symbol file. */
1012 symfile_objfile
= objfile
;
1014 clear_symtab_users ();
1016 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
1018 breakpoint_re_set ();
1021 /* We're done reading the symbol file; finish off complaints. */
1022 clear_complaints (&symfile_complaints
, 0, add_flags
& SYMFILE_VERBOSE
);
1025 /* Process a symbol file, as either the main file or as a dynamically
1028 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1029 This BFD will be closed on error, and is always consumed by this function.
1031 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1032 extra, such as dynamically loaded code, and what to do with breakpoins.
1034 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
1035 syms_from_objfile, above.
1036 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1038 Upon success, returns a pointer to the objfile that was added.
1039 Upon failure, jumps back to command level (never returns). */
1041 static struct objfile
*
1042 symbol_file_add_with_addrs_or_offsets (bfd
*abfd
,
1044 struct section_addr_info
*addrs
,
1045 struct section_offsets
*offsets
,
1049 struct objfile
*objfile
;
1050 struct cleanup
*my_cleanups
;
1051 const char *name
= bfd_get_filename (abfd
);
1052 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1054 my_cleanups
= make_cleanup_bfd_close (abfd
);
1056 /* Give user a chance to burp if we'd be
1057 interactively wiping out any existing symbols. */
1059 if ((have_full_symbols () || have_partial_symbols ())
1060 && (add_flags
& SYMFILE_MAINLINE
)
1062 && !query (_("Load new symbol table from \"%s\"? "), name
))
1063 error (_("Not confirmed."));
1065 objfile
= allocate_objfile (abfd
, flags
);
1066 discard_cleanups (my_cleanups
);
1068 /* We either created a new mapped symbol table, mapped an existing
1069 symbol table file which has not had initial symbol reading
1070 performed, or need to read an unmapped symbol table. */
1071 if (from_tty
|| info_verbose
)
1073 if (deprecated_pre_add_symbol_hook
)
1074 deprecated_pre_add_symbol_hook (name
);
1077 printf_unfiltered (_("Reading symbols from %s..."), name
);
1079 gdb_flush (gdb_stdout
);
1082 syms_from_objfile (objfile
, addrs
, offsets
, num_offsets
,
1085 /* We now have at least a partial symbol table. Check to see if the
1086 user requested that all symbols be read on initial access via either
1087 the gdb startup command line or on a per symbol file basis. Expand
1088 all partial symbol tables for this objfile if so. */
1090 if ((flags
& OBJF_READNOW
) || readnow_symbol_files
)
1092 if (from_tty
|| info_verbose
)
1094 printf_unfiltered (_("expanding to full symbols..."));
1096 gdb_flush (gdb_stdout
);
1100 objfile
->sf
->qf
->expand_all_symtabs (objfile
);
1103 if ((from_tty
|| info_verbose
)
1104 && !objfile_has_symbols (objfile
))
1107 printf_unfiltered (_("(no debugging symbols found)..."));
1111 if (from_tty
|| info_verbose
)
1113 if (deprecated_post_add_symbol_hook
)
1114 deprecated_post_add_symbol_hook ();
1116 printf_unfiltered (_("done.\n"));
1119 /* We print some messages regardless of whether 'from_tty ||
1120 info_verbose' is true, so make sure they go out at the right
1122 gdb_flush (gdb_stdout
);
1124 do_cleanups (my_cleanups
);
1126 if (objfile
->sf
== NULL
)
1128 observer_notify_new_objfile (objfile
);
1129 return objfile
; /* No symbols. */
1132 new_symfile_objfile (objfile
, add_flags
);
1134 observer_notify_new_objfile (objfile
);
1136 bfd_cache_close_all ();
1140 /* Add BFD as a separate debug file for OBJFILE. */
1143 symbol_file_add_separate (bfd
*bfd
, int symfile_flags
, struct objfile
*objfile
)
1145 struct objfile
*new_objfile
;
1146 struct section_addr_info
*sap
;
1147 struct cleanup
*my_cleanup
;
1149 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1150 because sections of BFD may not match sections of OBJFILE and because
1151 vma may have been modified by tools such as prelink. */
1152 sap
= build_section_addr_info_from_objfile (objfile
);
1153 my_cleanup
= make_cleanup_free_section_addr_info (sap
);
1155 new_objfile
= symbol_file_add_with_addrs_or_offsets
1156 (bfd
, symfile_flags
,
1158 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1159 | OBJF_USERLOADED
));
1161 do_cleanups (my_cleanup
);
1163 add_separate_debug_objfile (new_objfile
, objfile
);
1166 /* Process the symbol file ABFD, as either the main file or as a
1167 dynamically loaded file.
1169 See symbol_file_add_with_addrs_or_offsets's comments for
1172 symbol_file_add_from_bfd (bfd
*abfd
, int add_flags
,
1173 struct section_addr_info
*addrs
,
1176 return symbol_file_add_with_addrs_or_offsets (abfd
, add_flags
, addrs
, 0, 0,
1181 /* Process a symbol file, as either the main file or as a dynamically
1182 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
1185 symbol_file_add (char *name
, int add_flags
, struct section_addr_info
*addrs
,
1188 return symbol_file_add_from_bfd (symfile_bfd_open (name
), add_flags
, addrs
,
1193 /* Call symbol_file_add() with default values and update whatever is
1194 affected by the loading of a new main().
1195 Used when the file is supplied in the gdb command line
1196 and by some targets with special loading requirements.
1197 The auxiliary function, symbol_file_add_main_1(), has the flags
1198 argument for the switches that can only be specified in the symbol_file
1202 symbol_file_add_main (char *args
, int from_tty
)
1204 symbol_file_add_main_1 (args
, from_tty
, 0);
1208 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
1210 const int add_flags
= SYMFILE_MAINLINE
| (from_tty
? SYMFILE_VERBOSE
: 0);
1211 symbol_file_add (args
, add_flags
, NULL
, flags
);
1213 /* Getting new symbols may change our opinion about
1214 what is frameless. */
1215 reinit_frame_cache ();
1217 set_initial_language ();
1221 symbol_file_clear (int from_tty
)
1223 if ((have_full_symbols () || have_partial_symbols ())
1226 ? !query (_("Discard symbol table from `%s'? "),
1227 symfile_objfile
->name
)
1228 : !query (_("Discard symbol table? "))))
1229 error (_("Not confirmed."));
1231 free_all_objfiles ();
1233 /* solib descriptors may have handles to objfiles. Since their
1234 storage has just been released, we'd better wipe the solib
1235 descriptors as well. */
1236 no_shared_libraries (NULL
, from_tty
);
1238 gdb_assert (symfile_objfile
== NULL
);
1240 printf_unfiltered (_("No symbol file now.\n"));
1244 get_debug_link_info (struct objfile
*objfile
, unsigned long *crc32_out
)
1247 bfd_size_type debuglink_size
;
1248 unsigned long crc32
;
1253 sect
= bfd_get_section_by_name (objfile
->obfd
, ".gnu_debuglink");
1258 debuglink_size
= bfd_section_size (objfile
->obfd
, sect
);
1260 contents
= xmalloc (debuglink_size
);
1261 bfd_get_section_contents (objfile
->obfd
, sect
, contents
,
1262 (file_ptr
)0, (bfd_size_type
)debuglink_size
);
1264 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1265 crc_offset
= strlen (contents
) + 1;
1266 crc_offset
= (crc_offset
+ 3) & ~3;
1268 crc32
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) (contents
+ crc_offset
));
1275 separate_debug_file_exists (const char *name
, unsigned long crc
,
1276 struct objfile
*parent_objfile
)
1278 unsigned long file_crc
= 0;
1280 gdb_byte buffer
[8*1024];
1282 struct stat parent_stat
, abfd_stat
;
1284 /* Find a separate debug info file as if symbols would be present in
1285 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1286 section can contain just the basename of PARENT_OBJFILE without any
1287 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1288 the separate debug infos with the same basename can exist. */
1290 if (strcmp (name
, parent_objfile
->name
) == 0)
1293 abfd
= bfd_open_maybe_remote (name
);
1298 /* Verify symlinks were not the cause of strcmp name difference above.
1300 Some operating systems, e.g. Windows, do not provide a meaningful
1301 st_ino; they always set it to zero. (Windows does provide a
1302 meaningful st_dev.) Do not indicate a duplicate library in that
1303 case. While there is no guarantee that a system that provides
1304 meaningful inode numbers will never set st_ino to zero, this is
1305 merely an optimization, so we do not need to worry about false
1308 if (bfd_stat (abfd
, &abfd_stat
) == 0
1309 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0
1310 && abfd_stat
.st_dev
== parent_stat
.st_dev
1311 && abfd_stat
.st_ino
== parent_stat
.st_ino
1312 && abfd_stat
.st_ino
!= 0)
1318 while ((count
= bfd_bread (buffer
, sizeof (buffer
), abfd
)) > 0)
1319 file_crc
= gnu_debuglink_crc32 (file_crc
, buffer
, count
);
1323 if (crc
!= file_crc
)
1325 warning (_("the debug information found in \"%s\""
1326 " does not match \"%s\" (CRC mismatch).\n"),
1327 name
, parent_objfile
->name
);
1334 char *debug_file_directory
= NULL
;
1336 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1337 struct cmd_list_element
*c
, const char *value
)
1339 fprintf_filtered (file
, _("\
1340 The directory where separate debug symbols are searched for is \"%s\".\n"),
1344 #if ! defined (DEBUG_SUBDIRECTORY)
1345 #define DEBUG_SUBDIRECTORY ".debug"
1349 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1352 char *basename
, *name_copy
, *debugdir
;
1354 char *debugfile
= NULL
;
1355 char *canon_name
= NULL
;
1356 bfd_size_type debuglink_size
;
1357 unsigned long crc32
;
1360 basename
= get_debug_link_info (objfile
, &crc32
);
1362 if (basename
== NULL
)
1363 /* There's no separate debug info, hence there's no way we could
1364 load it => no warning. */
1365 goto cleanup_return_debugfile
;
1367 dir
= xstrdup (objfile
->name
);
1369 /* Strip off the final filename part, leaving the directory name,
1370 followed by a slash. Objfile names should always be absolute and
1371 tilde-expanded, so there should always be a slash in there
1373 for (i
= strlen(dir
) - 1; i
>= 0; i
--)
1375 if (IS_DIR_SEPARATOR (dir
[i
]))
1378 gdb_assert (i
>= 0 && IS_DIR_SEPARATOR (dir
[i
]));
1381 /* Set I to max (strlen (canon_name), strlen (dir)). */
1382 canon_name
= lrealpath (dir
);
1384 if (canon_name
&& strlen (canon_name
) > i
)
1385 i
= strlen (canon_name
);
1387 debugfile
= xmalloc (strlen (debug_file_directory
) + 1
1389 + strlen (DEBUG_SUBDIRECTORY
)
1394 /* First try in the same directory as the original file. */
1395 strcpy (debugfile
, dir
);
1396 strcat (debugfile
, basename
);
1398 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1399 goto cleanup_return_debugfile
;
1401 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1402 strcpy (debugfile
, dir
);
1403 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1404 strcat (debugfile
, "/");
1405 strcat (debugfile
, basename
);
1407 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1408 goto cleanup_return_debugfile
;
1410 /* Then try in the global debugfile directories.
1412 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1413 cause "/..." lookups. */
1415 debugdir
= debug_file_directory
;
1420 while (*debugdir
== DIRNAME_SEPARATOR
)
1423 debugdir_end
= strchr (debugdir
, DIRNAME_SEPARATOR
);
1424 if (debugdir_end
== NULL
)
1425 debugdir_end
= &debugdir
[strlen (debugdir
)];
1427 memcpy (debugfile
, debugdir
, debugdir_end
- debugdir
);
1428 debugfile
[debugdir_end
- debugdir
] = 0;
1429 strcat (debugfile
, "/");
1430 strcat (debugfile
, dir
);
1431 strcat (debugfile
, basename
);
1433 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1434 goto cleanup_return_debugfile
;
1436 /* If the file is in the sysroot, try using its base path in the
1437 global debugfile directory. */
1439 && strncmp (canon_name
, gdb_sysroot
, strlen (gdb_sysroot
)) == 0
1440 && IS_DIR_SEPARATOR (canon_name
[strlen (gdb_sysroot
)]))
1442 memcpy (debugfile
, debugdir
, debugdir_end
- debugdir
);
1443 debugfile
[debugdir_end
- debugdir
] = 0;
1444 strcat (debugfile
, canon_name
+ strlen (gdb_sysroot
));
1445 strcat (debugfile
, "/");
1446 strcat (debugfile
, basename
);
1448 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1449 goto cleanup_return_debugfile
;
1452 debugdir
= debugdir_end
;
1454 while (*debugdir
!= 0);
1459 cleanup_return_debugfile
:
1467 /* This is the symbol-file command. Read the file, analyze its
1468 symbols, and add a struct symtab to a symtab list. The syntax of
1469 the command is rather bizarre:
1471 1. The function buildargv implements various quoting conventions
1472 which are undocumented and have little or nothing in common with
1473 the way things are quoted (or not quoted) elsewhere in GDB.
1475 2. Options are used, which are not generally used in GDB (perhaps
1476 "set mapped on", "set readnow on" would be better)
1478 3. The order of options matters, which is contrary to GNU
1479 conventions (because it is confusing and inconvenient). */
1482 symbol_file_command (char *args
, int from_tty
)
1488 symbol_file_clear (from_tty
);
1492 char **argv
= gdb_buildargv (args
);
1493 int flags
= OBJF_USERLOADED
;
1494 struct cleanup
*cleanups
;
1497 cleanups
= make_cleanup_freeargv (argv
);
1498 while (*argv
!= NULL
)
1500 if (strcmp (*argv
, "-readnow") == 0)
1501 flags
|= OBJF_READNOW
;
1502 else if (**argv
== '-')
1503 error (_("unknown option `%s'"), *argv
);
1506 symbol_file_add_main_1 (*argv
, from_tty
, flags
);
1514 error (_("no symbol file name was specified"));
1516 do_cleanups (cleanups
);
1520 /* Set the initial language.
1522 FIXME: A better solution would be to record the language in the
1523 psymtab when reading partial symbols, and then use it (if known) to
1524 set the language. This would be a win for formats that encode the
1525 language in an easily discoverable place, such as DWARF. For
1526 stabs, we can jump through hoops looking for specially named
1527 symbols or try to intuit the language from the specific type of
1528 stabs we find, but we can't do that until later when we read in
1532 set_initial_language (void)
1535 enum language lang
= language_unknown
;
1537 filename
= find_main_filename ();
1538 if (filename
!= NULL
)
1539 lang
= deduce_language_from_filename (filename
);
1541 if (lang
== language_unknown
)
1543 /* Make C the default language */
1547 set_language (lang
);
1548 expected_language
= current_language
; /* Don't warn the user. */
1551 /* If NAME is a remote name open the file using remote protocol, otherwise
1552 open it normally. */
1555 bfd_open_maybe_remote (const char *name
)
1557 if (remote_filename_p (name
))
1558 return remote_bfd_open (name
, gnutarget
);
1560 return bfd_openr (name
, gnutarget
);
1564 /* Open the file specified by NAME and hand it off to BFD for
1565 preliminary analysis. Return a newly initialized bfd *, which
1566 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1567 absolute). In case of trouble, error() is called. */
1570 symfile_bfd_open (char *name
)
1574 char *absolute_name
;
1576 if (remote_filename_p (name
))
1578 name
= xstrdup (name
);
1579 sym_bfd
= remote_bfd_open (name
, gnutarget
);
1582 make_cleanup (xfree
, name
);
1583 error (_("`%s': can't open to read symbols: %s."), name
,
1584 bfd_errmsg (bfd_get_error ()));
1587 if (!bfd_check_format (sym_bfd
, bfd_object
))
1589 bfd_close (sym_bfd
);
1590 make_cleanup (xfree
, name
);
1591 error (_("`%s': can't read symbols: %s."), name
,
1592 bfd_errmsg (bfd_get_error ()));
1598 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy. */
1600 /* Look down path for it, allocate 2nd new malloc'd copy. */
1601 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, name
,
1602 O_RDONLY
| O_BINARY
, &absolute_name
);
1603 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1606 char *exename
= alloca (strlen (name
) + 5);
1607 strcat (strcpy (exename
, name
), ".exe");
1608 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, exename
,
1609 O_RDONLY
| O_BINARY
, &absolute_name
);
1614 make_cleanup (xfree
, name
);
1615 perror_with_name (name
);
1618 /* Free 1st new malloc'd copy, but keep the 2nd malloc'd copy in
1619 bfd. It'll be freed in free_objfile(). */
1621 name
= absolute_name
;
1623 sym_bfd
= bfd_fopen (name
, gnutarget
, FOPEN_RB
, desc
);
1627 make_cleanup (xfree
, name
);
1628 error (_("`%s': can't open to read symbols: %s."), name
,
1629 bfd_errmsg (bfd_get_error ()));
1631 bfd_set_cacheable (sym_bfd
, 1);
1633 if (!bfd_check_format (sym_bfd
, bfd_object
))
1635 /* FIXME: should be checking for errors from bfd_close (for one
1636 thing, on error it does not free all the storage associated
1638 bfd_close (sym_bfd
); /* This also closes desc. */
1639 make_cleanup (xfree
, name
);
1640 error (_("`%s': can't read symbols: %s."), name
,
1641 bfd_errmsg (bfd_get_error ()));
1644 /* bfd_usrdata exists for applications and libbfd must not touch it. */
1645 gdb_assert (bfd_usrdata (sym_bfd
) == NULL
);
1650 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1651 the section was not found. */
1654 get_section_index (struct objfile
*objfile
, char *section_name
)
1656 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1664 /* Link SF into the global symtab_fns list. Called on startup by the
1665 _initialize routine in each object file format reader, to register
1666 information about each format the the reader is prepared to
1670 add_symtab_fns (struct sym_fns
*sf
)
1672 sf
->next
= symtab_fns
;
1676 /* Initialize OBJFILE to read symbols from its associated BFD. It
1677 either returns or calls error(). The result is an initialized
1678 struct sym_fns in the objfile structure, that contains cached
1679 information about the symbol file. */
1681 static struct sym_fns
*
1682 find_sym_fns (bfd
*abfd
)
1685 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1687 if (our_flavour
== bfd_target_srec_flavour
1688 || our_flavour
== bfd_target_ihex_flavour
1689 || our_flavour
== bfd_target_tekhex_flavour
)
1690 return NULL
; /* No symbols. */
1692 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
->next
)
1693 if (our_flavour
== sf
->sym_flavour
)
1696 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1697 bfd_get_target (abfd
));
1701 /* This function runs the load command of our current target. */
1704 load_command (char *arg
, int from_tty
)
1706 /* The user might be reloading because the binary has changed. Take
1707 this opportunity to check. */
1708 reopen_exec_file ();
1716 parg
= arg
= get_exec_file (1);
1718 /* Count how many \ " ' tab space there are in the name. */
1719 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1727 /* We need to quote this string so buildargv can pull it apart. */
1728 char *temp
= xmalloc (strlen (arg
) + count
+ 1 );
1732 make_cleanup (xfree
, temp
);
1735 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1737 strncpy (ptemp
, prev
, parg
- prev
);
1738 ptemp
+= parg
- prev
;
1742 strcpy (ptemp
, prev
);
1748 target_load (arg
, from_tty
);
1750 /* After re-loading the executable, we don't really know which
1751 overlays are mapped any more. */
1752 overlay_cache_invalid
= 1;
1755 /* This version of "load" should be usable for any target. Currently
1756 it is just used for remote targets, not inftarg.c or core files,
1757 on the theory that only in that case is it useful.
1759 Avoiding xmodem and the like seems like a win (a) because we don't have
1760 to worry about finding it, and (b) On VMS, fork() is very slow and so
1761 we don't want to run a subprocess. On the other hand, I'm not sure how
1762 performance compares. */
1764 static int validate_download
= 0;
1766 /* Callback service function for generic_load (bfd_map_over_sections). */
1769 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1771 bfd_size_type
*sum
= data
;
1773 *sum
+= bfd_get_section_size (asec
);
1776 /* Opaque data for load_section_callback. */
1777 struct load_section_data
{
1778 unsigned long load_offset
;
1779 struct load_progress_data
*progress_data
;
1780 VEC(memory_write_request_s
) *requests
;
1783 /* Opaque data for load_progress. */
1784 struct load_progress_data
{
1785 /* Cumulative data. */
1786 unsigned long write_count
;
1787 unsigned long data_count
;
1788 bfd_size_type total_size
;
1791 /* Opaque data for load_progress for a single section. */
1792 struct load_progress_section_data
{
1793 struct load_progress_data
*cumulative
;
1795 /* Per-section data. */
1796 const char *section_name
;
1797 ULONGEST section_sent
;
1798 ULONGEST section_size
;
1803 /* Target write callback routine for progress reporting. */
1806 load_progress (ULONGEST bytes
, void *untyped_arg
)
1808 struct load_progress_section_data
*args
= untyped_arg
;
1809 struct load_progress_data
*totals
;
1812 /* Writing padding data. No easy way to get at the cumulative
1813 stats, so just ignore this. */
1816 totals
= args
->cumulative
;
1818 if (bytes
== 0 && args
->section_sent
== 0)
1820 /* The write is just starting. Let the user know we've started
1822 ui_out_message (uiout
, 0, "Loading section %s, size %s lma %s\n",
1823 args
->section_name
, hex_string (args
->section_size
),
1824 paddress (target_gdbarch
, args
->lma
));
1828 if (validate_download
)
1830 /* Broken memories and broken monitors manifest themselves here
1831 when bring new computers to life. This doubles already slow
1833 /* NOTE: cagney/1999-10-18: A more efficient implementation
1834 might add a verify_memory() method to the target vector and
1835 then use that. remote.c could implement that method using
1836 the ``qCRC'' packet. */
1837 gdb_byte
*check
= xmalloc (bytes
);
1838 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
1840 if (target_read_memory (args
->lma
, check
, bytes
) != 0)
1841 error (_("Download verify read failed at %s"),
1842 paddress (target_gdbarch
, args
->lma
));
1843 if (memcmp (args
->buffer
, check
, bytes
) != 0)
1844 error (_("Download verify compare failed at %s"),
1845 paddress (target_gdbarch
, args
->lma
));
1846 do_cleanups (verify_cleanups
);
1848 totals
->data_count
+= bytes
;
1850 args
->buffer
+= bytes
;
1851 totals
->write_count
+= 1;
1852 args
->section_sent
+= bytes
;
1854 || (deprecated_ui_load_progress_hook
!= NULL
1855 && deprecated_ui_load_progress_hook (args
->section_name
,
1856 args
->section_sent
)))
1857 error (_("Canceled the download"));
1859 if (deprecated_show_load_progress
!= NULL
)
1860 deprecated_show_load_progress (args
->section_name
,
1864 totals
->total_size
);
1867 /* Callback service function for generic_load (bfd_map_over_sections). */
1870 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1872 struct memory_write_request
*new_request
;
1873 struct load_section_data
*args
= data
;
1874 struct load_progress_section_data
*section_data
;
1875 bfd_size_type size
= bfd_get_section_size (asec
);
1877 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1879 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
1885 new_request
= VEC_safe_push (memory_write_request_s
,
1886 args
->requests
, NULL
);
1887 memset (new_request
, 0, sizeof (struct memory_write_request
));
1888 section_data
= xcalloc (1, sizeof (struct load_progress_section_data
));
1889 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1890 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size be in instead? */
1891 new_request
->data
= xmalloc (size
);
1892 new_request
->baton
= section_data
;
1894 buffer
= new_request
->data
;
1896 section_data
->cumulative
= args
->progress_data
;
1897 section_data
->section_name
= sect_name
;
1898 section_data
->section_size
= size
;
1899 section_data
->lma
= new_request
->begin
;
1900 section_data
->buffer
= buffer
;
1902 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1905 /* Clean up an entire memory request vector, including load
1906 data and progress records. */
1909 clear_memory_write_data (void *arg
)
1911 VEC(memory_write_request_s
) **vec_p
= arg
;
1912 VEC(memory_write_request_s
) *vec
= *vec_p
;
1914 struct memory_write_request
*mr
;
1916 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
1921 VEC_free (memory_write_request_s
, vec
);
1925 generic_load (char *args
, int from_tty
)
1928 struct timeval start_time
, end_time
;
1930 struct cleanup
*old_cleanups
= make_cleanup (null_cleanup
, 0);
1931 struct load_section_data cbdata
;
1932 struct load_progress_data total_progress
;
1937 memset (&cbdata
, 0, sizeof (cbdata
));
1938 memset (&total_progress
, 0, sizeof (total_progress
));
1939 cbdata
.progress_data
= &total_progress
;
1941 make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
1944 error_no_arg (_("file to load"));
1946 argv
= gdb_buildargv (args
);
1947 make_cleanup_freeargv (argv
);
1949 filename
= tilde_expand (argv
[0]);
1950 make_cleanup (xfree
, filename
);
1952 if (argv
[1] != NULL
)
1956 cbdata
.load_offset
= strtoul (argv
[1], &endptr
, 0);
1958 /* If the last word was not a valid number then
1959 treat it as a file name with spaces in. */
1960 if (argv
[1] == endptr
)
1961 error (_("Invalid download offset:%s."), argv
[1]);
1963 if (argv
[2] != NULL
)
1964 error (_("Too many parameters."));
1967 /* Open the file for loading. */
1968 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
1969 if (loadfile_bfd
== NULL
)
1971 perror_with_name (filename
);
1975 /* FIXME: should be checking for errors from bfd_close (for one thing,
1976 on error it does not free all the storage associated with the
1978 make_cleanup_bfd_close (loadfile_bfd
);
1980 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
1982 error (_("\"%s\" is not an object file: %s"), filename
,
1983 bfd_errmsg (bfd_get_error ()));
1986 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
1987 (void *) &total_progress
.total_size
);
1989 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
1991 gettimeofday (&start_time
, NULL
);
1993 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
1994 load_progress
) != 0)
1995 error (_("Load failed"));
1997 gettimeofday (&end_time
, NULL
);
1999 entry
= bfd_get_start_address (loadfile_bfd
);
2000 ui_out_text (uiout
, "Start address ");
2001 ui_out_field_fmt (uiout
, "address", "%s", paddress (target_gdbarch
, entry
));
2002 ui_out_text (uiout
, ", load size ");
2003 ui_out_field_fmt (uiout
, "load-size", "%lu", total_progress
.data_count
);
2004 ui_out_text (uiout
, "\n");
2005 /* We were doing this in remote-mips.c, I suspect it is right
2006 for other targets too. */
2007 regcache_write_pc (get_current_regcache (), entry
);
2009 /* Reset breakpoints, now that we have changed the load image. For
2010 instance, breakpoints may have been set (or reset, by
2011 post_create_inferior) while connected to the target but before we
2012 loaded the program. In that case, the prologue analyzer could
2013 have read instructions from the target to find the right
2014 breakpoint locations. Loading has changed the contents of that
2017 breakpoint_re_set ();
2019 /* FIXME: are we supposed to call symbol_file_add or not? According
2020 to a comment from remote-mips.c (where a call to symbol_file_add
2021 was commented out), making the call confuses GDB if more than one
2022 file is loaded in. Some targets do (e.g., remote-vx.c) but
2023 others don't (or didn't - perhaps they have all been deleted). */
2025 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2026 total_progress
.write_count
,
2027 &start_time
, &end_time
);
2029 do_cleanups (old_cleanups
);
2032 /* Report how fast the transfer went. */
2034 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
2035 replaced by print_transfer_performance (with a very different
2036 function signature). */
2039 report_transfer_performance (unsigned long data_count
, time_t start_time
,
2042 struct timeval start
, end
;
2044 start
.tv_sec
= start_time
;
2046 end
.tv_sec
= end_time
;
2049 print_transfer_performance (gdb_stdout
, data_count
, 0, &start
, &end
);
2053 print_transfer_performance (struct ui_file
*stream
,
2054 unsigned long data_count
,
2055 unsigned long write_count
,
2056 const struct timeval
*start_time
,
2057 const struct timeval
*end_time
)
2059 ULONGEST time_count
;
2061 /* Compute the elapsed time in milliseconds, as a tradeoff between
2062 accuracy and overflow. */
2063 time_count
= (end_time
->tv_sec
- start_time
->tv_sec
) * 1000;
2064 time_count
+= (end_time
->tv_usec
- start_time
->tv_usec
) / 1000;
2066 ui_out_text (uiout
, "Transfer rate: ");
2069 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / time_count
;
2071 if (ui_out_is_mi_like_p (uiout
))
2073 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
* 8);
2074 ui_out_text (uiout
, " bits/sec");
2076 else if (rate
< 1024)
2078 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
);
2079 ui_out_text (uiout
, " bytes/sec");
2083 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
/ 1024);
2084 ui_out_text (uiout
, " KB/sec");
2089 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
2090 ui_out_text (uiout
, " bits in <1 sec");
2092 if (write_count
> 0)
2094 ui_out_text (uiout
, ", ");
2095 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
2096 ui_out_text (uiout
, " bytes/write");
2098 ui_out_text (uiout
, ".\n");
2101 /* This function allows the addition of incrementally linked object files.
2102 It does not modify any state in the target, only in the debugger. */
2103 /* Note: ezannoni 2000-04-13 This function/command used to have a
2104 special case syntax for the rombug target (Rombug is the boot
2105 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2106 rombug case, the user doesn't need to supply a text address,
2107 instead a call to target_link() (in target.c) would supply the
2108 value to use. We are now discontinuing this type of ad hoc syntax. */
2111 add_symbol_file_command (char *args
, int from_tty
)
2113 struct gdbarch
*gdbarch
= get_current_arch ();
2114 char *filename
= NULL
;
2115 int flags
= OBJF_USERLOADED
;
2117 int expecting_option
= 0;
2118 int section_index
= 0;
2122 int expecting_sec_name
= 0;
2123 int expecting_sec_addr
= 0;
2132 struct section_addr_info
*section_addrs
;
2133 struct sect_opt
*sect_opts
= NULL
;
2134 size_t num_sect_opts
= 0;
2135 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2138 sect_opts
= (struct sect_opt
*) xmalloc (num_sect_opts
2139 * sizeof (struct sect_opt
));
2144 error (_("add-symbol-file takes a file name and an address"));
2146 argv
= gdb_buildargv (args
);
2147 make_cleanup_freeargv (argv
);
2149 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2151 /* Process the argument. */
2154 /* The first argument is the file name. */
2155 filename
= tilde_expand (arg
);
2156 make_cleanup (xfree
, filename
);
2161 /* The second argument is always the text address at which
2162 to load the program. */
2163 sect_opts
[section_index
].name
= ".text";
2164 sect_opts
[section_index
].value
= arg
;
2165 if (++section_index
>= num_sect_opts
)
2168 sect_opts
= ((struct sect_opt
*)
2169 xrealloc (sect_opts
,
2171 * sizeof (struct sect_opt
)));
2176 /* It's an option (starting with '-') or it's an argument
2181 if (strcmp (arg
, "-readnow") == 0)
2182 flags
|= OBJF_READNOW
;
2183 else if (strcmp (arg
, "-s") == 0)
2185 expecting_sec_name
= 1;
2186 expecting_sec_addr
= 1;
2191 if (expecting_sec_name
)
2193 sect_opts
[section_index
].name
= arg
;
2194 expecting_sec_name
= 0;
2197 if (expecting_sec_addr
)
2199 sect_opts
[section_index
].value
= arg
;
2200 expecting_sec_addr
= 0;
2201 if (++section_index
>= num_sect_opts
)
2204 sect_opts
= ((struct sect_opt
*)
2205 xrealloc (sect_opts
,
2207 * sizeof (struct sect_opt
)));
2211 error (_("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*"));
2216 /* This command takes at least two arguments. The first one is a
2217 filename, and the second is the address where this file has been
2218 loaded. Abort now if this address hasn't been provided by the
2220 if (section_index
< 1)
2221 error (_("The address where %s has been loaded is missing"), filename
);
2223 /* Print the prompt for the query below. And save the arguments into
2224 a sect_addr_info structure to be passed around to other
2225 functions. We have to split this up into separate print
2226 statements because hex_string returns a local static
2229 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename
);
2230 section_addrs
= alloc_section_addr_info (section_index
);
2231 make_cleanup (xfree
, section_addrs
);
2232 for (i
= 0; i
< section_index
; i
++)
2235 char *val
= sect_opts
[i
].value
;
2236 char *sec
= sect_opts
[i
].name
;
2238 addr
= parse_and_eval_address (val
);
2240 /* Here we store the section offsets in the order they were
2241 entered on the command line. */
2242 section_addrs
->other
[sec_num
].name
= sec
;
2243 section_addrs
->other
[sec_num
].addr
= addr
;
2244 printf_unfiltered ("\t%s_addr = %s\n", sec
,
2245 paddress (gdbarch
, addr
));
2248 /* The object's sections are initialized when a
2249 call is made to build_objfile_section_table (objfile).
2250 This happens in reread_symbols.
2251 At this point, we don't know what file type this is,
2252 so we can't determine what section names are valid. */
2255 if (from_tty
&& (!query ("%s", "")))
2256 error (_("Not confirmed."));
2258 symbol_file_add (filename
, from_tty
? SYMFILE_VERBOSE
: 0,
2259 section_addrs
, flags
);
2261 /* Getting new symbols may change our opinion about what is
2263 reinit_frame_cache ();
2264 do_cleanups (my_cleanups
);
2268 /* Re-read symbols if a symbol-file has changed. */
2270 reread_symbols (void)
2272 struct objfile
*objfile
;
2275 struct stat new_statbuf
;
2278 /* With the addition of shared libraries, this should be modified,
2279 the load time should be saved in the partial symbol tables, since
2280 different tables may come from different source files. FIXME.
2281 This routine should then walk down each partial symbol table
2282 and see if the symbol table that it originates from has been changed */
2284 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2286 /* solib-sunos.c creates one objfile with obfd. */
2287 if (objfile
->obfd
== NULL
)
2290 /* Separate debug objfiles are handled in the main objfile. */
2291 if (objfile
->separate_debug_objfile_backlink
)
2294 #ifdef DEPRECATED_IBM6000_TARGET
2295 /* If this object is from a shared library, then you should
2296 stat on the library name, not member name. */
2298 if (objfile
->obfd
->my_archive
)
2299 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2302 res
= stat (objfile
->name
, &new_statbuf
);
2305 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2306 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2310 new_modtime
= new_statbuf
.st_mtime
;
2311 if (new_modtime
!= objfile
->mtime
)
2313 struct cleanup
*old_cleanups
;
2314 struct section_offsets
*offsets
;
2316 char *obfd_filename
;
2318 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2321 /* There are various functions like symbol_file_add,
2322 symfile_bfd_open, syms_from_objfile, etc., which might
2323 appear to do what we want. But they have various other
2324 effects which we *don't* want. So we just do stuff
2325 ourselves. We don't worry about mapped files (for one thing,
2326 any mapped file will be out of date). */
2328 /* If we get an error, blow away this objfile (not sure if
2329 that is the correct response for things like shared
2331 old_cleanups
= make_cleanup_free_objfile (objfile
);
2332 /* We need to do this whenever any symbols go away. */
2333 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2335 if (exec_bfd
!= NULL
&& strcmp (bfd_get_filename (objfile
->obfd
),
2336 bfd_get_filename (exec_bfd
)) == 0)
2338 /* Reload EXEC_BFD without asking anything. */
2340 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2343 /* Clean up any state BFD has sitting around. We don't need
2344 to close the descriptor but BFD lacks a way of closing the
2345 BFD without closing the descriptor. */
2346 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2347 if (!bfd_close (objfile
->obfd
))
2348 error (_("Can't close BFD for %s: %s"), objfile
->name
,
2349 bfd_errmsg (bfd_get_error ()));
2350 objfile
->obfd
= bfd_open_maybe_remote (obfd_filename
);
2351 if (objfile
->obfd
== NULL
)
2352 error (_("Can't open %s to read symbols."), objfile
->name
);
2354 objfile
->obfd
= gdb_bfd_ref (objfile
->obfd
);
2355 /* bfd_openr sets cacheable to true, which is what we want. */
2356 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2357 error (_("Can't read symbols from %s: %s."), objfile
->name
,
2358 bfd_errmsg (bfd_get_error ()));
2360 /* Save the offsets, we will nuke them with the rest of the
2362 num_offsets
= objfile
->num_sections
;
2363 offsets
= ((struct section_offsets
*)
2364 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2365 memcpy (offsets
, objfile
->section_offsets
,
2366 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2368 /* Remove any references to this objfile in the global
2370 preserve_values (objfile
);
2372 /* Nuke all the state that we will re-read. Much of the following
2373 code which sets things to NULL really is necessary to tell
2374 other parts of GDB that there is nothing currently there.
2376 Try to keep the freeing order compatible with free_objfile. */
2378 if (objfile
->sf
!= NULL
)
2380 (*objfile
->sf
->sym_finish
) (objfile
);
2383 clear_objfile_data (objfile
);
2385 /* Free the separate debug objfiles. It will be
2386 automatically recreated by sym_read. */
2387 free_objfile_separate_debug (objfile
);
2389 /* FIXME: Do we have to free a whole linked list, or is this
2391 if (objfile
->global_psymbols
.list
)
2392 xfree (objfile
->global_psymbols
.list
);
2393 memset (&objfile
->global_psymbols
, 0,
2394 sizeof (objfile
->global_psymbols
));
2395 if (objfile
->static_psymbols
.list
)
2396 xfree (objfile
->static_psymbols
.list
);
2397 memset (&objfile
->static_psymbols
, 0,
2398 sizeof (objfile
->static_psymbols
));
2400 /* Free the obstacks for non-reusable objfiles */
2401 bcache_xfree (objfile
->psymbol_cache
);
2402 objfile
->psymbol_cache
= bcache_xmalloc ();
2403 bcache_xfree (objfile
->macro_cache
);
2404 objfile
->macro_cache
= bcache_xmalloc ();
2405 bcache_xfree (objfile
->filename_cache
);
2406 objfile
->filename_cache
= bcache_xmalloc ();
2407 if (objfile
->demangled_names_hash
!= NULL
)
2409 htab_delete (objfile
->demangled_names_hash
);
2410 objfile
->demangled_names_hash
= NULL
;
2412 obstack_free (&objfile
->objfile_obstack
, 0);
2413 objfile
->sections
= NULL
;
2414 objfile
->symtabs
= NULL
;
2415 objfile
->psymtabs
= NULL
;
2416 objfile
->psymtabs_addrmap
= NULL
;
2417 objfile
->free_psymtabs
= NULL
;
2418 objfile
->cp_namespace_symtab
= NULL
;
2419 objfile
->msymbols
= NULL
;
2420 objfile
->deprecated_sym_private
= NULL
;
2421 objfile
->minimal_symbol_count
= 0;
2422 memset (&objfile
->msymbol_hash
, 0,
2423 sizeof (objfile
->msymbol_hash
));
2424 memset (&objfile
->msymbol_demangled_hash
, 0,
2425 sizeof (objfile
->msymbol_demangled_hash
));
2427 objfile
->psymbol_cache
= bcache_xmalloc ();
2428 objfile
->macro_cache
= bcache_xmalloc ();
2429 objfile
->filename_cache
= bcache_xmalloc ();
2430 /* obstack_init also initializes the obstack so it is
2431 empty. We could use obstack_specify_allocation but
2432 gdb_obstack.h specifies the alloc/dealloc
2434 obstack_init (&objfile
->objfile_obstack
);
2435 if (build_objfile_section_table (objfile
))
2437 error (_("Can't find the file sections in `%s': %s"),
2438 objfile
->name
, bfd_errmsg (bfd_get_error ()));
2440 terminate_minimal_symbol_table (objfile
);
2442 /* We use the same section offsets as from last time. I'm not
2443 sure whether that is always correct for shared libraries. */
2444 objfile
->section_offsets
= (struct section_offsets
*)
2445 obstack_alloc (&objfile
->objfile_obstack
,
2446 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2447 memcpy (objfile
->section_offsets
, offsets
,
2448 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2449 objfile
->num_sections
= num_offsets
;
2451 /* What the hell is sym_new_init for, anyway? The concept of
2452 distinguishing between the main file and additional files
2453 in this way seems rather dubious. */
2454 if (objfile
== symfile_objfile
)
2456 (*objfile
->sf
->sym_new_init
) (objfile
);
2459 (*objfile
->sf
->sym_init
) (objfile
);
2460 clear_complaints (&symfile_complaints
, 1, 1);
2461 /* Do not set flags as this is safe and we don't want to be
2463 (*objfile
->sf
->sym_read
) (objfile
, 0);
2464 if (!objfile_has_symbols (objfile
))
2467 printf_unfiltered (_("(no debugging symbols found)\n"));
2471 /* We're done reading the symbol file; finish off complaints. */
2472 clear_complaints (&symfile_complaints
, 0, 1);
2474 /* Getting new symbols may change our opinion about what is
2477 reinit_frame_cache ();
2479 /* Discard cleanups as symbol reading was successful. */
2480 discard_cleanups (old_cleanups
);
2482 /* If the mtime has changed between the time we set new_modtime
2483 and now, we *want* this to be out of date, so don't call stat
2485 objfile
->mtime
= new_modtime
;
2487 init_entry_point_info (objfile
);
2493 /* Notify objfiles that we've modified objfile sections. */
2494 objfiles_changed ();
2496 clear_symtab_users ();
2497 /* At least one objfile has changed, so we can consider that
2498 the executable we're debugging has changed too. */
2499 observer_notify_executable_changed ();
2512 static filename_language
*filename_language_table
;
2513 static int fl_table_size
, fl_table_next
;
2516 add_filename_language (char *ext
, enum language lang
)
2518 if (fl_table_next
>= fl_table_size
)
2520 fl_table_size
+= 10;
2521 filename_language_table
=
2522 xrealloc (filename_language_table
,
2523 fl_table_size
* sizeof (*filename_language_table
));
2526 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2527 filename_language_table
[fl_table_next
].lang
= lang
;
2531 static char *ext_args
;
2533 show_ext_args (struct ui_file
*file
, int from_tty
,
2534 struct cmd_list_element
*c
, const char *value
)
2536 fprintf_filtered (file
, _("\
2537 Mapping between filename extension and source language is \"%s\".\n"),
2542 set_ext_lang_command (char *args
, int from_tty
, struct cmd_list_element
*e
)
2545 char *cp
= ext_args
;
2548 /* First arg is filename extension, starting with '.' */
2550 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2552 /* Find end of first arg. */
2553 while (*cp
&& !isspace (*cp
))
2557 error (_("'%s': two arguments required -- filename extension and language"),
2560 /* Null-terminate first arg */
2563 /* Find beginning of second arg, which should be a source language. */
2564 while (*cp
&& isspace (*cp
))
2568 error (_("'%s': two arguments required -- filename extension and language"),
2571 /* Lookup the language from among those we know. */
2572 lang
= language_enum (cp
);
2574 /* Now lookup the filename extension: do we already know it? */
2575 for (i
= 0; i
< fl_table_next
; i
++)
2576 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2579 if (i
>= fl_table_next
)
2581 /* new file extension */
2582 add_filename_language (ext_args
, lang
);
2586 /* redefining a previously known filename extension */
2589 /* query ("Really make files of type %s '%s'?", */
2590 /* ext_args, language_str (lang)); */
2592 xfree (filename_language_table
[i
].ext
);
2593 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2594 filename_language_table
[i
].lang
= lang
;
2599 info_ext_lang_command (char *args
, int from_tty
)
2603 printf_filtered (_("Filename extensions and the languages they represent:"));
2604 printf_filtered ("\n\n");
2605 for (i
= 0; i
< fl_table_next
; i
++)
2606 printf_filtered ("\t%s\t- %s\n",
2607 filename_language_table
[i
].ext
,
2608 language_str (filename_language_table
[i
].lang
));
2612 init_filename_language_table (void)
2614 if (fl_table_size
== 0) /* protect against repetition */
2618 filename_language_table
=
2619 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
2620 add_filename_language (".c", language_c
);
2621 add_filename_language (".C", language_cplus
);
2622 add_filename_language (".cc", language_cplus
);
2623 add_filename_language (".cp", language_cplus
);
2624 add_filename_language (".cpp", language_cplus
);
2625 add_filename_language (".cxx", language_cplus
);
2626 add_filename_language (".c++", language_cplus
);
2627 add_filename_language (".java", language_java
);
2628 add_filename_language (".class", language_java
);
2629 add_filename_language (".m", language_objc
);
2630 add_filename_language (".f", language_fortran
);
2631 add_filename_language (".F", language_fortran
);
2632 add_filename_language (".s", language_asm
);
2633 add_filename_language (".sx", language_asm
);
2634 add_filename_language (".S", language_asm
);
2635 add_filename_language (".pas", language_pascal
);
2636 add_filename_language (".p", language_pascal
);
2637 add_filename_language (".pp", language_pascal
);
2638 add_filename_language (".adb", language_ada
);
2639 add_filename_language (".ads", language_ada
);
2640 add_filename_language (".a", language_ada
);
2641 add_filename_language (".ada", language_ada
);
2646 deduce_language_from_filename (char *filename
)
2651 if (filename
!= NULL
)
2652 if ((cp
= strrchr (filename
, '.')) != NULL
)
2653 for (i
= 0; i
< fl_table_next
; i
++)
2654 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2655 return filename_language_table
[i
].lang
;
2657 return language_unknown
;
2662 Allocate and partly initialize a new symbol table. Return a pointer
2663 to it. error() if no space.
2665 Caller must set these fields:
2674 allocate_symtab (char *filename
, struct objfile
*objfile
)
2676 struct symtab
*symtab
;
2678 symtab
= (struct symtab
*)
2679 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symtab
));
2680 memset (symtab
, 0, sizeof (*symtab
));
2681 symtab
->filename
= (char *) bcache (filename
, strlen (filename
) + 1,
2682 objfile
->filename_cache
);
2683 symtab
->fullname
= NULL
;
2684 symtab
->language
= deduce_language_from_filename (filename
);
2685 symtab
->debugformat
= "unknown";
2687 /* Hook it to the objfile it comes from */
2689 symtab
->objfile
= objfile
;
2690 symtab
->next
= objfile
->symtabs
;
2691 objfile
->symtabs
= symtab
;
2697 /* Reset all data structures in gdb which may contain references to symbol
2701 clear_symtab_users (void)
2703 /* Someday, we should do better than this, by only blowing away
2704 the things that really need to be blown. */
2706 /* Clear the "current" symtab first, because it is no longer valid.
2707 breakpoint_re_set may try to access the current symtab. */
2708 clear_current_source_symtab_and_line ();
2711 breakpoint_re_set ();
2712 set_default_breakpoint (0, NULL
, 0, 0, 0);
2713 clear_pc_function_cache ();
2714 observer_notify_new_objfile (NULL
);
2716 /* Clear globals which might have pointed into a removed objfile.
2717 FIXME: It's not clear which of these are supposed to persist
2718 between expressions and which ought to be reset each time. */
2719 expression_context_block
= NULL
;
2720 innermost_block
= NULL
;
2722 /* Varobj may refer to old symbols, perform a cleanup. */
2723 varobj_invalidate ();
2728 clear_symtab_users_cleanup (void *ignore
)
2730 clear_symtab_users ();
2734 The following code implements an abstraction for debugging overlay sections.
2736 The target model is as follows:
2737 1) The gnu linker will permit multiple sections to be mapped into the
2738 same VMA, each with its own unique LMA (or load address).
2739 2) It is assumed that some runtime mechanism exists for mapping the
2740 sections, one by one, from the load address into the VMA address.
2741 3) This code provides a mechanism for gdb to keep track of which
2742 sections should be considered to be mapped from the VMA to the LMA.
2743 This information is used for symbol lookup, and memory read/write.
2744 For instance, if a section has been mapped then its contents
2745 should be read from the VMA, otherwise from the LMA.
2747 Two levels of debugger support for overlays are available. One is
2748 "manual", in which the debugger relies on the user to tell it which
2749 overlays are currently mapped. This level of support is
2750 implemented entirely in the core debugger, and the information about
2751 whether a section is mapped is kept in the objfile->obj_section table.
2753 The second level of support is "automatic", and is only available if
2754 the target-specific code provides functionality to read the target's
2755 overlay mapping table, and translate its contents for the debugger
2756 (by updating the mapped state information in the obj_section tables).
2758 The interface is as follows:
2760 overlay map <name> -- tell gdb to consider this section mapped
2761 overlay unmap <name> -- tell gdb to consider this section unmapped
2762 overlay list -- list the sections that GDB thinks are mapped
2763 overlay read-target -- get the target's state of what's mapped
2764 overlay off/manual/auto -- set overlay debugging state
2765 Functional interface:
2766 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2767 section, return that section.
2768 find_pc_overlay(pc): find any overlay section that contains
2769 the pc, either in its VMA or its LMA
2770 section_is_mapped(sect): true if overlay is marked as mapped
2771 section_is_overlay(sect): true if section's VMA != LMA
2772 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2773 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2774 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2775 overlay_mapped_address(...): map an address from section's LMA to VMA
2776 overlay_unmapped_address(...): map an address from section's VMA to LMA
2777 symbol_overlayed_address(...): Return a "current" address for symbol:
2778 either in VMA or LMA depending on whether
2779 the symbol's section is currently mapped
2782 /* Overlay debugging state: */
2784 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2785 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
2787 /* Function: section_is_overlay (SECTION)
2788 Returns true if SECTION has VMA not equal to LMA, ie.
2789 SECTION is loaded at an address different from where it will "run". */
2792 section_is_overlay (struct obj_section
*section
)
2794 if (overlay_debugging
&& section
)
2796 bfd
*abfd
= section
->objfile
->obfd
;
2797 asection
*bfd_section
= section
->the_bfd_section
;
2799 if (bfd_section_lma (abfd
, bfd_section
) != 0
2800 && bfd_section_lma (abfd
, bfd_section
)
2801 != bfd_section_vma (abfd
, bfd_section
))
2808 /* Function: overlay_invalidate_all (void)
2809 Invalidate the mapped state of all overlay sections (mark it as stale). */
2812 overlay_invalidate_all (void)
2814 struct objfile
*objfile
;
2815 struct obj_section
*sect
;
2817 ALL_OBJSECTIONS (objfile
, sect
)
2818 if (section_is_overlay (sect
))
2819 sect
->ovly_mapped
= -1;
2822 /* Function: section_is_mapped (SECTION)
2823 Returns true if section is an overlay, and is currently mapped.
2825 Access to the ovly_mapped flag is restricted to this function, so
2826 that we can do automatic update. If the global flag
2827 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2828 overlay_invalidate_all. If the mapped state of the particular
2829 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2832 section_is_mapped (struct obj_section
*osect
)
2834 struct gdbarch
*gdbarch
;
2836 if (osect
== 0 || !section_is_overlay (osect
))
2839 switch (overlay_debugging
)
2843 return 0; /* overlay debugging off */
2844 case ovly_auto
: /* overlay debugging automatic */
2845 /* Unles there is a gdbarch_overlay_update function,
2846 there's really nothing useful to do here (can't really go auto) */
2847 gdbarch
= get_objfile_arch (osect
->objfile
);
2848 if (gdbarch_overlay_update_p (gdbarch
))
2850 if (overlay_cache_invalid
)
2852 overlay_invalidate_all ();
2853 overlay_cache_invalid
= 0;
2855 if (osect
->ovly_mapped
== -1)
2856 gdbarch_overlay_update (gdbarch
, osect
);
2858 /* fall thru to manual case */
2859 case ovly_on
: /* overlay debugging manual */
2860 return osect
->ovly_mapped
== 1;
2864 /* Function: pc_in_unmapped_range
2865 If PC falls into the lma range of SECTION, return true, else false. */
2868 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
2870 if (section_is_overlay (section
))
2872 bfd
*abfd
= section
->objfile
->obfd
;
2873 asection
*bfd_section
= section
->the_bfd_section
;
2875 /* We assume the LMA is relocated by the same offset as the VMA. */
2876 bfd_vma size
= bfd_get_section_size (bfd_section
);
2877 CORE_ADDR offset
= obj_section_offset (section
);
2879 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
2880 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
2887 /* Function: pc_in_mapped_range
2888 If PC falls into the vma range of SECTION, return true, else false. */
2891 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
2893 if (section_is_overlay (section
))
2895 if (obj_section_addr (section
) <= pc
2896 && pc
< obj_section_endaddr (section
))
2904 /* Return true if the mapped ranges of sections A and B overlap, false
2907 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
2909 CORE_ADDR a_start
= obj_section_addr (a
);
2910 CORE_ADDR a_end
= obj_section_endaddr (a
);
2911 CORE_ADDR b_start
= obj_section_addr (b
);
2912 CORE_ADDR b_end
= obj_section_endaddr (b
);
2914 return (a_start
< b_end
&& b_start
< a_end
);
2917 /* Function: overlay_unmapped_address (PC, SECTION)
2918 Returns the address corresponding to PC in the unmapped (load) range.
2919 May be the same as PC. */
2922 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
2924 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
2926 bfd
*abfd
= section
->objfile
->obfd
;
2927 asection
*bfd_section
= section
->the_bfd_section
;
2929 return pc
+ bfd_section_lma (abfd
, bfd_section
)
2930 - bfd_section_vma (abfd
, bfd_section
);
2936 /* Function: overlay_mapped_address (PC, SECTION)
2937 Returns the address corresponding to PC in the mapped (runtime) range.
2938 May be the same as PC. */
2941 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
2943 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
2945 bfd
*abfd
= section
->objfile
->obfd
;
2946 asection
*bfd_section
= section
->the_bfd_section
;
2948 return pc
+ bfd_section_vma (abfd
, bfd_section
)
2949 - bfd_section_lma (abfd
, bfd_section
);
2956 /* Function: symbol_overlayed_address
2957 Return one of two addresses (relative to the VMA or to the LMA),
2958 depending on whether the section is mapped or not. */
2961 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
2963 if (overlay_debugging
)
2965 /* If the symbol has no section, just return its regular address. */
2968 /* If the symbol's section is not an overlay, just return its address */
2969 if (!section_is_overlay (section
))
2971 /* If the symbol's section is mapped, just return its address */
2972 if (section_is_mapped (section
))
2975 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
2976 * then return its LOADED address rather than its vma address!!
2978 return overlay_unmapped_address (address
, section
);
2983 /* Function: find_pc_overlay (PC)
2984 Return the best-match overlay section for PC:
2985 If PC matches a mapped overlay section's VMA, return that section.
2986 Else if PC matches an unmapped section's VMA, return that section.
2987 Else if PC matches an unmapped section's LMA, return that section. */
2989 struct obj_section
*
2990 find_pc_overlay (CORE_ADDR pc
)
2992 struct objfile
*objfile
;
2993 struct obj_section
*osect
, *best_match
= NULL
;
2995 if (overlay_debugging
)
2996 ALL_OBJSECTIONS (objfile
, osect
)
2997 if (section_is_overlay (osect
))
2999 if (pc_in_mapped_range (pc
, osect
))
3001 if (section_is_mapped (osect
))
3006 else if (pc_in_unmapped_range (pc
, osect
))
3012 /* Function: find_pc_mapped_section (PC)
3013 If PC falls into the VMA address range of an overlay section that is
3014 currently marked as MAPPED, return that section. Else return NULL. */
3016 struct obj_section
*
3017 find_pc_mapped_section (CORE_ADDR pc
)
3019 struct objfile
*objfile
;
3020 struct obj_section
*osect
;
3022 if (overlay_debugging
)
3023 ALL_OBJSECTIONS (objfile
, osect
)
3024 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3030 /* Function: list_overlays_command
3031 Print a list of mapped sections and their PC ranges */
3034 list_overlays_command (char *args
, int from_tty
)
3037 struct objfile
*objfile
;
3038 struct obj_section
*osect
;
3040 if (overlay_debugging
)
3041 ALL_OBJSECTIONS (objfile
, osect
)
3042 if (section_is_mapped (osect
))
3044 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3049 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3050 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3051 size
= bfd_get_section_size (osect
->the_bfd_section
);
3052 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3054 printf_filtered ("Section %s, loaded at ", name
);
3055 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3056 puts_filtered (" - ");
3057 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3058 printf_filtered (", mapped at ");
3059 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3060 puts_filtered (" - ");
3061 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3062 puts_filtered ("\n");
3067 printf_filtered (_("No sections are mapped.\n"));
3070 /* Function: map_overlay_command
3071 Mark the named section as mapped (ie. residing at its VMA address). */
3074 map_overlay_command (char *args
, int from_tty
)
3076 struct objfile
*objfile
, *objfile2
;
3077 struct obj_section
*sec
, *sec2
;
3079 if (!overlay_debugging
)
3081 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3082 the 'overlay manual' command."));
3084 if (args
== 0 || *args
== 0)
3085 error (_("Argument required: name of an overlay section"));
3087 /* First, find a section matching the user supplied argument */
3088 ALL_OBJSECTIONS (objfile
, sec
)
3089 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3091 /* Now, check to see if the section is an overlay. */
3092 if (!section_is_overlay (sec
))
3093 continue; /* not an overlay section */
3095 /* Mark the overlay as "mapped" */
3096 sec
->ovly_mapped
= 1;
3098 /* Next, make a pass and unmap any sections that are
3099 overlapped by this new section: */
3100 ALL_OBJSECTIONS (objfile2
, sec2
)
3101 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
, sec2
))
3104 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3105 bfd_section_name (objfile
->obfd
,
3106 sec2
->the_bfd_section
));
3107 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
3111 error (_("No overlay section called %s"), args
);
3114 /* Function: unmap_overlay_command
3115 Mark the overlay section as unmapped
3116 (ie. resident in its LMA address range, rather than the VMA range). */
3119 unmap_overlay_command (char *args
, int from_tty
)
3121 struct objfile
*objfile
;
3122 struct obj_section
*sec
;
3124 if (!overlay_debugging
)
3126 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3127 the 'overlay manual' command."));
3129 if (args
== 0 || *args
== 0)
3130 error (_("Argument required: name of an overlay section"));
3132 /* First, find a section matching the user supplied argument */
3133 ALL_OBJSECTIONS (objfile
, sec
)
3134 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3136 if (!sec
->ovly_mapped
)
3137 error (_("Section %s is not mapped"), args
);
3138 sec
->ovly_mapped
= 0;
3141 error (_("No overlay section called %s"), args
);
3144 /* Function: overlay_auto_command
3145 A utility command to turn on overlay debugging.
3146 Possibly this should be done via a set/show command. */
3149 overlay_auto_command (char *args
, int from_tty
)
3151 overlay_debugging
= ovly_auto
;
3152 enable_overlay_breakpoints ();
3154 printf_unfiltered (_("Automatic overlay debugging enabled."));
3157 /* Function: overlay_manual_command
3158 A utility command to turn on overlay debugging.
3159 Possibly this should be done via a set/show command. */
3162 overlay_manual_command (char *args
, int from_tty
)
3164 overlay_debugging
= ovly_on
;
3165 disable_overlay_breakpoints ();
3167 printf_unfiltered (_("Overlay debugging enabled."));
3170 /* Function: overlay_off_command
3171 A utility command to turn on overlay debugging.
3172 Possibly this should be done via a set/show command. */
3175 overlay_off_command (char *args
, int from_tty
)
3177 overlay_debugging
= ovly_off
;
3178 disable_overlay_breakpoints ();
3180 printf_unfiltered (_("Overlay debugging disabled."));
3184 overlay_load_command (char *args
, int from_tty
)
3186 struct gdbarch
*gdbarch
= get_current_arch ();
3188 if (gdbarch_overlay_update_p (gdbarch
))
3189 gdbarch_overlay_update (gdbarch
, NULL
);
3191 error (_("This target does not know how to read its overlay state."));
3194 /* Function: overlay_command
3195 A place-holder for a mis-typed command */
3197 /* Command list chain containing all defined "overlay" subcommands. */
3198 struct cmd_list_element
*overlaylist
;
3201 overlay_command (char *args
, int from_tty
)
3204 ("\"overlay\" must be followed by the name of an overlay command.\n");
3205 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3209 /* Target Overlays for the "Simplest" overlay manager:
3211 This is GDB's default target overlay layer. It works with the
3212 minimal overlay manager supplied as an example by Cygnus. The
3213 entry point is via a function pointer "gdbarch_overlay_update",
3214 so targets that use a different runtime overlay manager can
3215 substitute their own overlay_update function and take over the
3218 The overlay_update function pokes around in the target's data structures
3219 to see what overlays are mapped, and updates GDB's overlay mapping with
3222 In this simple implementation, the target data structures are as follows:
3223 unsigned _novlys; /# number of overlay sections #/
3224 unsigned _ovly_table[_novlys][4] = {
3225 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3226 {..., ..., ..., ...},
3228 unsigned _novly_regions; /# number of overlay regions #/
3229 unsigned _ovly_region_table[_novly_regions][3] = {
3230 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3233 These functions will attempt to update GDB's mappedness state in the
3234 symbol section table, based on the target's mappedness state.
3236 To do this, we keep a cached copy of the target's _ovly_table, and
3237 attempt to detect when the cached copy is invalidated. The main
3238 entry point is "simple_overlay_update(SECT), which looks up SECT in
3239 the cached table and re-reads only the entry for that section from
3240 the target (whenever possible).
3243 /* Cached, dynamically allocated copies of the target data structures: */
3244 static unsigned (*cache_ovly_table
)[4] = 0;
3246 static unsigned (*cache_ovly_region_table
)[3] = 0;
3248 static unsigned cache_novlys
= 0;
3250 static unsigned cache_novly_regions
= 0;
3252 static CORE_ADDR cache_ovly_table_base
= 0;
3254 static CORE_ADDR cache_ovly_region_table_base
= 0;
3258 VMA
, SIZE
, LMA
, MAPPED
3261 /* Throw away the cached copy of _ovly_table */
3263 simple_free_overlay_table (void)
3265 if (cache_ovly_table
)
3266 xfree (cache_ovly_table
);
3268 cache_ovly_table
= NULL
;
3269 cache_ovly_table_base
= 0;
3273 /* Throw away the cached copy of _ovly_region_table */
3275 simple_free_overlay_region_table (void)
3277 if (cache_ovly_region_table
)
3278 xfree (cache_ovly_region_table
);
3279 cache_novly_regions
= 0;
3280 cache_ovly_region_table
= NULL
;
3281 cache_ovly_region_table_base
= 0;
3285 /* Read an array of ints of size SIZE from the target into a local buffer.
3286 Convert to host order. int LEN is number of ints */
3288 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3289 int len
, int size
, enum bfd_endian byte_order
)
3291 /* FIXME (alloca): Not safe if array is very large. */
3292 gdb_byte
*buf
= alloca (len
* size
);
3295 read_memory (memaddr
, buf
, len
* size
);
3296 for (i
= 0; i
< len
; i
++)
3297 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3300 /* Find and grab a copy of the target _ovly_table
3301 (and _novlys, which is needed for the table's size) */
3303 simple_read_overlay_table (void)
3305 struct minimal_symbol
*novlys_msym
, *ovly_table_msym
;
3306 struct gdbarch
*gdbarch
;
3308 enum bfd_endian byte_order
;
3310 simple_free_overlay_table ();
3311 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3314 error (_("Error reading inferior's overlay table: "
3315 "couldn't find `_novlys' variable\n"
3316 "in inferior. Use `overlay manual' mode."));
3320 ovly_table_msym
= lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3321 if (! ovly_table_msym
)
3323 error (_("Error reading inferior's overlay table: couldn't find "
3324 "`_ovly_table' array\n"
3325 "in inferior. Use `overlay manual' mode."));
3329 gdbarch
= get_objfile_arch (msymbol_objfile (ovly_table_msym
));
3330 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3331 byte_order
= gdbarch_byte_order (gdbarch
);
3333 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
),
3336 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3337 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3338 read_target_long_array (cache_ovly_table_base
,
3339 (unsigned int *) cache_ovly_table
,
3340 cache_novlys
* 4, word_size
, byte_order
);
3342 return 1; /* SUCCESS */
3346 /* Find and grab a copy of the target _ovly_region_table
3347 (and _novly_regions, which is needed for the table's size) */
3349 simple_read_overlay_region_table (void)
3351 struct minimal_symbol
*msym
;
3352 struct gdbarch
*gdbarch
;
3354 enum bfd_endian byte_order
;
3356 simple_free_overlay_region_table ();
3357 msym
= lookup_minimal_symbol ("_novly_regions", NULL
, NULL
);
3359 return 0; /* failure */
3361 gdbarch
= get_objfile_arch (msymbol_objfile (msym
));
3362 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3363 byte_order
= gdbarch_byte_order (gdbarch
);
3365 cache_novly_regions
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
),
3368 cache_ovly_region_table
= (void *) xmalloc (cache_novly_regions
* 12);
3369 if (cache_ovly_region_table
!= NULL
)
3371 msym
= lookup_minimal_symbol ("_ovly_region_table", NULL
, NULL
);
3374 cache_ovly_region_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3375 read_target_long_array (cache_ovly_region_table_base
,
3376 (unsigned int *) cache_ovly_region_table
,
3377 cache_novly_regions
* 3,
3378 word_size
, byte_order
);
3381 return 0; /* failure */
3384 return 0; /* failure */
3385 return 1; /* SUCCESS */
3389 /* Function: simple_overlay_update_1
3390 A helper function for simple_overlay_update. Assuming a cached copy
3391 of _ovly_table exists, look through it to find an entry whose vma,
3392 lma and size match those of OSECT. Re-read the entry and make sure
3393 it still matches OSECT (else the table may no longer be valid).
3394 Set OSECT's mapped state to match the entry. Return: 1 for
3395 success, 0 for failure. */
3398 simple_overlay_update_1 (struct obj_section
*osect
)
3401 bfd
*obfd
= osect
->objfile
->obfd
;
3402 asection
*bsect
= osect
->the_bfd_section
;
3403 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3404 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3405 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3407 size
= bfd_get_section_size (osect
->the_bfd_section
);
3408 for (i
= 0; i
< cache_novlys
; i
++)
3409 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3410 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3411 /* && cache_ovly_table[i][SIZE] == size */ )
3413 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3414 (unsigned int *) cache_ovly_table
[i
],
3415 4, word_size
, byte_order
);
3416 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3417 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3418 /* && cache_ovly_table[i][SIZE] == size */ )
3420 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3423 else /* Warning! Warning! Target's ovly table has changed! */
3429 /* Function: simple_overlay_update
3430 If OSECT is NULL, then update all sections' mapped state
3431 (after re-reading the entire target _ovly_table).
3432 If OSECT is non-NULL, then try to find a matching entry in the
3433 cached ovly_table and update only OSECT's mapped state.
3434 If a cached entry can't be found or the cache isn't valid, then
3435 re-read the entire cache, and go ahead and update all sections. */
3438 simple_overlay_update (struct obj_section
*osect
)
3440 struct objfile
*objfile
;
3442 /* Were we given an osect to look up? NULL means do all of them. */
3444 /* Have we got a cached copy of the target's overlay table? */
3445 if (cache_ovly_table
!= NULL
)
3446 /* Does its cached location match what's currently in the symtab? */
3447 if (cache_ovly_table_base
==
3448 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL
, NULL
)))
3449 /* Then go ahead and try to look up this single section in the cache */
3450 if (simple_overlay_update_1 (osect
))
3451 /* Found it! We're done. */
3454 /* Cached table no good: need to read the entire table anew.
3455 Or else we want all the sections, in which case it's actually
3456 more efficient to read the whole table in one block anyway. */
3458 if (! simple_read_overlay_table ())
3461 /* Now may as well update all sections, even if only one was requested. */
3462 ALL_OBJSECTIONS (objfile
, osect
)
3463 if (section_is_overlay (osect
))
3466 bfd
*obfd
= osect
->objfile
->obfd
;
3467 asection
*bsect
= osect
->the_bfd_section
;
3469 size
= bfd_get_section_size (bsect
);
3470 for (i
= 0; i
< cache_novlys
; i
++)
3471 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3472 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3473 /* && cache_ovly_table[i][SIZE] == size */ )
3474 { /* obj_section matches i'th entry in ovly_table */
3475 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3476 break; /* finished with inner for loop: break out */
3481 /* Set the output sections and output offsets for section SECTP in
3482 ABFD. The relocation code in BFD will read these offsets, so we
3483 need to be sure they're initialized. We map each section to itself,
3484 with no offset; this means that SECTP->vma will be honored. */
3487 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3489 sectp
->output_section
= sectp
;
3490 sectp
->output_offset
= 0;
3493 /* Default implementation for sym_relocate. */
3497 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3500 bfd
*abfd
= objfile
->obfd
;
3502 /* We're only interested in sections with relocation
3504 if ((sectp
->flags
& SEC_RELOC
) == 0)
3507 /* We will handle section offsets properly elsewhere, so relocate as if
3508 all sections begin at 0. */
3509 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3511 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3514 /* Relocate the contents of a debug section SECTP in ABFD. The
3515 contents are stored in BUF if it is non-NULL, or returned in a
3516 malloc'd buffer otherwise.
3518 For some platforms and debug info formats, shared libraries contain
3519 relocations against the debug sections (particularly for DWARF-2;
3520 one affected platform is PowerPC GNU/Linux, although it depends on
3521 the version of the linker in use). Also, ELF object files naturally
3522 have unresolved relocations for their debug sections. We need to apply
3523 the relocations in order to get the locations of symbols correct.
3524 Another example that may require relocation processing, is the
3525 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3529 symfile_relocate_debug_section (struct objfile
*objfile
,
3530 asection
*sectp
, bfd_byte
*buf
)
3532 gdb_assert (objfile
->sf
->sym_relocate
);
3534 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3537 struct symfile_segment_data
*
3538 get_symfile_segment_data (bfd
*abfd
)
3540 struct sym_fns
*sf
= find_sym_fns (abfd
);
3545 return sf
->sym_segments (abfd
);
3549 free_symfile_segment_data (struct symfile_segment_data
*data
)
3551 xfree (data
->segment_bases
);
3552 xfree (data
->segment_sizes
);
3553 xfree (data
->segment_info
);
3559 - DATA, containing segment addresses from the object file ABFD, and
3560 the mapping from ABFD's sections onto the segments that own them,
3562 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3563 segment addresses reported by the target,
3564 store the appropriate offsets for each section in OFFSETS.
3566 If there are fewer entries in SEGMENT_BASES than there are segments
3567 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3569 If there are more entries, then ignore the extra. The target may
3570 not be able to distinguish between an empty data segment and a
3571 missing data segment; a missing text segment is less plausible. */
3573 symfile_map_offsets_to_segments (bfd
*abfd
, struct symfile_segment_data
*data
,
3574 struct section_offsets
*offsets
,
3575 int num_segment_bases
,
3576 const CORE_ADDR
*segment_bases
)
3581 /* It doesn't make sense to call this function unless you have some
3582 segment base addresses. */
3583 gdb_assert (num_segment_bases
> 0);
3585 /* If we do not have segment mappings for the object file, we
3586 can not relocate it by segments. */
3587 gdb_assert (data
!= NULL
);
3588 gdb_assert (data
->num_segments
> 0);
3590 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3592 int which
= data
->segment_info
[i
];
3594 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
3596 /* Don't bother computing offsets for sections that aren't
3597 loaded as part of any segment. */
3601 /* Use the last SEGMENT_BASES entry as the address of any extra
3602 segments mentioned in DATA->segment_info. */
3603 if (which
> num_segment_bases
)
3604 which
= num_segment_bases
;
3606 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
3607 - data
->segment_bases
[which
- 1]);
3614 symfile_find_segment_sections (struct objfile
*objfile
)
3616 bfd
*abfd
= objfile
->obfd
;
3619 struct symfile_segment_data
*data
;
3621 data
= get_symfile_segment_data (objfile
->obfd
);
3625 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
3627 free_symfile_segment_data (data
);
3631 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3634 int which
= data
->segment_info
[i
];
3638 if (objfile
->sect_index_text
== -1)
3639 objfile
->sect_index_text
= sect
->index
;
3641 if (objfile
->sect_index_rodata
== -1)
3642 objfile
->sect_index_rodata
= sect
->index
;
3644 else if (which
== 2)
3646 if (objfile
->sect_index_data
== -1)
3647 objfile
->sect_index_data
= sect
->index
;
3649 if (objfile
->sect_index_bss
== -1)
3650 objfile
->sect_index_bss
= sect
->index
;
3654 free_symfile_segment_data (data
);
3658 _initialize_symfile (void)
3660 struct cmd_list_element
*c
;
3662 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3663 Load symbol table from executable file FILE.\n\
3664 The `file' command can also load symbol tables, as well as setting the file\n\
3665 to execute."), &cmdlist
);
3666 set_cmd_completer (c
, filename_completer
);
3668 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3669 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3670 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3671 ADDR is the starting address of the file's text.\n\
3672 The optional arguments are section-name section-address pairs and\n\
3673 should be specified if the data and bss segments are not contiguous\n\
3674 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3676 set_cmd_completer (c
, filename_completer
);
3678 c
= add_cmd ("load", class_files
, load_command
, _("\
3679 Dynamically load FILE into the running program, and record its symbols\n\
3680 for access from GDB.\n\
3681 A load OFFSET may also be given."), &cmdlist
);
3682 set_cmd_completer (c
, filename_completer
);
3684 add_setshow_boolean_cmd ("symbol-reloading", class_support
,
3685 &symbol_reloading
, _("\
3686 Set dynamic symbol table reloading multiple times in one run."), _("\
3687 Show dynamic symbol table reloading multiple times in one run."), NULL
,
3689 show_symbol_reloading
,
3690 &setlist
, &showlist
);
3692 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3693 _("Commands for debugging overlays."), &overlaylist
,
3694 "overlay ", 0, &cmdlist
);
3696 add_com_alias ("ovly", "overlay", class_alias
, 1);
3697 add_com_alias ("ov", "overlay", class_alias
, 1);
3699 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3700 _("Assert that an overlay section is mapped."), &overlaylist
);
3702 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3703 _("Assert that an overlay section is unmapped."), &overlaylist
);
3705 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3706 _("List mappings of overlay sections."), &overlaylist
);
3708 add_cmd ("manual", class_support
, overlay_manual_command
,
3709 _("Enable overlay debugging."), &overlaylist
);
3710 add_cmd ("off", class_support
, overlay_off_command
,
3711 _("Disable overlay debugging."), &overlaylist
);
3712 add_cmd ("auto", class_support
, overlay_auto_command
,
3713 _("Enable automatic overlay debugging."), &overlaylist
);
3714 add_cmd ("load-target", class_support
, overlay_load_command
,
3715 _("Read the overlay mapping state from the target."), &overlaylist
);
3717 /* Filename extension to source language lookup table: */
3718 init_filename_language_table ();
3719 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3721 Set mapping between filename extension and source language."), _("\
3722 Show mapping between filename extension and source language."), _("\
3723 Usage: set extension-language .foo bar"),
3724 set_ext_lang_command
,
3726 &setlist
, &showlist
);
3728 add_info ("extensions", info_ext_lang_command
,
3729 _("All filename extensions associated with a source language."));
3731 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3732 &debug_file_directory
, _("\
3733 Set the directories where separate debug symbols are searched for."), _("\
3734 Show the directories where separate debug symbols are searched for."), _("\
3735 Separate debug symbols are first searched for in the same\n\
3736 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3737 and lastly at the path of the directory of the binary with\n\
3738 each global debug-file-directory component prepended."),
3740 show_debug_file_directory
,
3741 &setlist
, &showlist
);