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, 2011
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
,
72 void (*deprecated_show_load_progress
) (const char *section
,
73 unsigned long section_sent
,
74 unsigned long section_size
,
75 unsigned long total_sent
,
76 unsigned long total_size
);
77 void (*deprecated_pre_add_symbol_hook
) (const char *);
78 void (*deprecated_post_add_symbol_hook
) (void);
80 static void clear_symtab_users_cleanup (void *ignore
);
82 /* Global variables owned by this file. */
83 int readnow_symbol_files
; /* Read full symbols immediately. */
85 /* External variables and functions referenced. */
87 extern void report_transfer_performance (unsigned long, time_t, time_t);
89 /* Functions this file defines. */
91 static void load_command (char *, int);
93 static void symbol_file_add_main_1 (char *args
, int from_tty
, int flags
);
95 static void add_symbol_file_command (char *, int);
97 bfd
*symfile_bfd_open (char *);
99 int get_section_index (struct objfile
*, char *);
101 static const struct sym_fns
*find_sym_fns (bfd
*);
103 static void decrement_reading_symtab (void *);
105 static void overlay_invalidate_all (void);
107 void list_overlays_command (char *, int);
109 void map_overlay_command (char *, int);
111 void unmap_overlay_command (char *, int);
113 static void overlay_auto_command (char *, int);
115 static void overlay_manual_command (char *, int);
117 static void overlay_off_command (char *, int);
119 static void overlay_load_command (char *, int);
121 static void overlay_command (char *, int);
123 static void simple_free_overlay_table (void);
125 static void read_target_long_array (CORE_ADDR
, unsigned int *, int, int,
128 static int simple_read_overlay_table (void);
130 static int simple_overlay_update_1 (struct obj_section
*);
132 static void add_filename_language (char *ext
, enum language lang
);
134 static void info_ext_lang_command (char *args
, int from_tty
);
136 static void init_filename_language_table (void);
138 static void symfile_find_segment_sections (struct objfile
*objfile
);
140 void _initialize_symfile (void);
142 /* List of all available sym_fns. On gdb startup, each object file reader
143 calls add_symtab_fns() to register information on each format it is
146 typedef const struct sym_fns
*sym_fns_ptr
;
147 DEF_VEC_P (sym_fns_ptr
);
149 static VEC (sym_fns_ptr
) *symtab_fns
= NULL
;
151 /* Flag for whether user will be reloading symbols multiple times.
152 Defaults to ON for VxWorks, otherwise OFF. */
154 #ifdef SYMBOL_RELOADING_DEFAULT
155 int symbol_reloading
= SYMBOL_RELOADING_DEFAULT
;
157 int symbol_reloading
= 0;
160 show_symbol_reloading (struct ui_file
*file
, int from_tty
,
161 struct cmd_list_element
*c
, const char *value
)
163 fprintf_filtered (file
, _("Dynamic symbol table reloading "
164 "multiple times in one run is %s.\n"),
168 /* If non-zero, shared library symbols will be added automatically
169 when the inferior is created, new libraries are loaded, or when
170 attaching to the inferior. This is almost always what users will
171 want to have happen; but for very large programs, the startup time
172 will be excessive, and so if this is a problem, the user can clear
173 this flag and then add the shared library symbols as needed. Note
174 that there is a potential for confusion, since if the shared
175 library symbols are not loaded, commands like "info fun" will *not*
176 report all the functions that are actually present. */
178 int auto_solib_add
= 1;
181 /* Make a null terminated copy of the string at PTR with SIZE characters in
182 the obstack pointed to by OBSTACKP . Returns the address of the copy.
183 Note that the string at PTR does not have to be null terminated, I.e. it
184 may be part of a larger string and we are only saving a substring. */
187 obsavestring (const char *ptr
, int size
, struct obstack
*obstackp
)
189 char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
190 /* Open-coded memcpy--saves function call time. These strings are usually
191 short. FIXME: Is this really still true with a compiler that can
194 const char *p1
= ptr
;
196 const char *end
= ptr
+ size
;
205 /* Concatenate NULL terminated variable argument list of `const char *'
206 strings; return the new string. Space is found in the OBSTACKP.
207 Argument list must be terminated by a sentinel expression `(char *)
211 obconcat (struct obstack
*obstackp
, ...)
215 va_start (ap
, obstackp
);
218 const char *s
= va_arg (ap
, const char *);
223 obstack_grow_str (obstackp
, s
);
226 obstack_1grow (obstackp
, 0);
228 return obstack_finish (obstackp
);
231 /* True if we are reading a symbol table. */
233 int currently_reading_symtab
= 0;
236 decrement_reading_symtab (void *dummy
)
238 currently_reading_symtab
--;
241 /* Increment currently_reading_symtab and return a cleanup that can be
242 used to decrement it. */
244 increment_reading_symtab (void)
246 ++currently_reading_symtab
;
247 return make_cleanup (decrement_reading_symtab
, NULL
);
250 /* Remember the lowest-addressed loadable section we've seen.
251 This function is called via bfd_map_over_sections.
253 In case of equal vmas, the section with the largest size becomes the
254 lowest-addressed loadable section.
256 If the vmas and sizes are equal, the last section is considered the
257 lowest-addressed loadable section. */
260 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
262 asection
**lowest
= (asection
**) obj
;
264 if (0 == (bfd_get_section_flags (abfd
, sect
) & (SEC_ALLOC
| SEC_LOAD
)))
267 *lowest
= sect
; /* First loadable section */
268 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
269 *lowest
= sect
; /* A lower loadable section */
270 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
271 && (bfd_section_size (abfd
, (*lowest
))
272 <= bfd_section_size (abfd
, sect
)))
276 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
278 struct section_addr_info
*
279 alloc_section_addr_info (size_t num_sections
)
281 struct section_addr_info
*sap
;
284 size
= (sizeof (struct section_addr_info
)
285 + sizeof (struct other_sections
) * (num_sections
- 1));
286 sap
= (struct section_addr_info
*) xmalloc (size
);
287 memset (sap
, 0, size
);
288 sap
->num_sections
= num_sections
;
293 /* Build (allocate and populate) a section_addr_info struct from
294 an existing section table. */
296 extern struct section_addr_info
*
297 build_section_addr_info_from_section_table (const struct target_section
*start
,
298 const struct target_section
*end
)
300 struct section_addr_info
*sap
;
301 const struct target_section
*stp
;
304 sap
= alloc_section_addr_info (end
- start
);
306 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
308 if (bfd_get_section_flags (stp
->bfd
,
309 stp
->the_bfd_section
) & (SEC_ALLOC
| SEC_LOAD
)
310 && oidx
< end
- start
)
312 sap
->other
[oidx
].addr
= stp
->addr
;
313 sap
->other
[oidx
].name
314 = xstrdup (bfd_section_name (stp
->bfd
, stp
->the_bfd_section
));
315 sap
->other
[oidx
].sectindex
= stp
->the_bfd_section
->index
;
323 /* Create a section_addr_info from section offsets in ABFD. */
325 static struct section_addr_info
*
326 build_section_addr_info_from_bfd (bfd
*abfd
)
328 struct section_addr_info
*sap
;
330 struct bfd_section
*sec
;
332 sap
= alloc_section_addr_info (bfd_count_sections (abfd
));
333 for (i
= 0, sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
334 if (bfd_get_section_flags (abfd
, sec
) & (SEC_ALLOC
| SEC_LOAD
))
336 sap
->other
[i
].addr
= bfd_get_section_vma (abfd
, sec
);
337 sap
->other
[i
].name
= xstrdup (bfd_get_section_name (abfd
, sec
));
338 sap
->other
[i
].sectindex
= sec
->index
;
344 /* Create a section_addr_info from section offsets in OBJFILE. */
346 struct section_addr_info
*
347 build_section_addr_info_from_objfile (const struct objfile
*objfile
)
349 struct section_addr_info
*sap
;
352 /* Before reread_symbols gets rewritten it is not safe to call:
353 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
355 sap
= build_section_addr_info_from_bfd (objfile
->obfd
);
356 for (i
= 0; i
< sap
->num_sections
&& sap
->other
[i
].name
; i
++)
358 int sectindex
= sap
->other
[i
].sectindex
;
360 sap
->other
[i
].addr
+= objfile
->section_offsets
->offsets
[sectindex
];
365 /* Free all memory allocated by build_section_addr_info_from_section_table. */
368 free_section_addr_info (struct section_addr_info
*sap
)
372 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
373 if (sap
->other
[idx
].name
)
374 xfree (sap
->other
[idx
].name
);
379 /* Initialize OBJFILE's sect_index_* members. */
381 init_objfile_sect_indices (struct objfile
*objfile
)
386 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
388 objfile
->sect_index_text
= sect
->index
;
390 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
392 objfile
->sect_index_data
= sect
->index
;
394 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
396 objfile
->sect_index_bss
= sect
->index
;
398 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
400 objfile
->sect_index_rodata
= sect
->index
;
402 /* This is where things get really weird... We MUST have valid
403 indices for the various sect_index_* members or gdb will abort.
404 So if for example, there is no ".text" section, we have to
405 accomodate that. First, check for a file with the standard
406 one or two segments. */
408 symfile_find_segment_sections (objfile
);
410 /* Except when explicitly adding symbol files at some address,
411 section_offsets contains nothing but zeros, so it doesn't matter
412 which slot in section_offsets the individual sect_index_* members
413 index into. So if they are all zero, it is safe to just point
414 all the currently uninitialized indices to the first slot. But
415 beware: if this is the main executable, it may be relocated
416 later, e.g. by the remote qOffsets packet, and then this will
417 be wrong! That's why we try segments first. */
419 for (i
= 0; i
< objfile
->num_sections
; i
++)
421 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
426 if (i
== objfile
->num_sections
)
428 if (objfile
->sect_index_text
== -1)
429 objfile
->sect_index_text
= 0;
430 if (objfile
->sect_index_data
== -1)
431 objfile
->sect_index_data
= 0;
432 if (objfile
->sect_index_bss
== -1)
433 objfile
->sect_index_bss
= 0;
434 if (objfile
->sect_index_rodata
== -1)
435 objfile
->sect_index_rodata
= 0;
439 /* The arguments to place_section. */
441 struct place_section_arg
443 struct section_offsets
*offsets
;
447 /* Find a unique offset to use for loadable section SECT if
448 the user did not provide an offset. */
451 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
453 struct place_section_arg
*arg
= obj
;
454 CORE_ADDR
*offsets
= arg
->offsets
->offsets
, start_addr
;
456 ULONGEST align
= ((ULONGEST
) 1) << bfd_get_section_alignment (abfd
, sect
);
458 /* We are only interested in allocated sections. */
459 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
462 /* If the user specified an offset, honor it. */
463 if (offsets
[sect
->index
] != 0)
466 /* Otherwise, let's try to find a place for the section. */
467 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
474 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
476 int indx
= cur_sec
->index
;
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 /* Transform section name S for a name comparison. prelink can split section
541 `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly
542 prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address
543 of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss'
544 (`.sbss') section has invalid (increased) virtual address. */
547 addr_section_name (const char *s
)
549 if (strcmp (s
, ".dynbss") == 0)
551 if (strcmp (s
, ".sdynbss") == 0)
557 /* qsort comparator for addrs_section_sort. Sort entries in ascending order by
558 their (name, sectindex) pair. sectindex makes the sort by name stable. */
561 addrs_section_compar (const void *ap
, const void *bp
)
563 const struct other_sections
*a
= *((struct other_sections
**) ap
);
564 const struct other_sections
*b
= *((struct other_sections
**) bp
);
565 int retval
, a_idx
, b_idx
;
567 retval
= strcmp (addr_section_name (a
->name
), addr_section_name (b
->name
));
571 /* SECTINDEX is undefined iff ADDR is zero. */
572 a_idx
= a
->addr
== 0 ? 0 : a
->sectindex
;
573 b_idx
= b
->addr
== 0 ? 0 : b
->sectindex
;
574 return a_idx
- b_idx
;
577 /* Provide sorted array of pointers to sections of ADDRS. The array is
578 terminated by NULL. Caller is responsible to call xfree for it. */
580 static struct other_sections
**
581 addrs_section_sort (struct section_addr_info
*addrs
)
583 struct other_sections
**array
;
586 /* `+ 1' for the NULL terminator. */
587 array
= xmalloc (sizeof (*array
) * (addrs
->num_sections
+ 1));
588 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
589 array
[i
] = &addrs
->other
[i
];
592 qsort (array
, i
, sizeof (*array
), addrs_section_compar
);
597 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
598 also SECTINDEXes specific to ABFD there. This function can be used to
599 rebase ADDRS to start referencing different BFD than before. */
602 addr_info_make_relative (struct section_addr_info
*addrs
, bfd
*abfd
)
604 asection
*lower_sect
;
605 CORE_ADDR lower_offset
;
607 struct cleanup
*my_cleanup
;
608 struct section_addr_info
*abfd_addrs
;
609 struct other_sections
**addrs_sorted
, **abfd_addrs_sorted
;
610 struct other_sections
**addrs_to_abfd_addrs
;
612 /* Find lowest loadable section to be used as starting point for
613 continguous sections. */
615 bfd_map_over_sections (abfd
, find_lowest_section
, &lower_sect
);
616 if (lower_sect
== NULL
)
618 warning (_("no loadable sections found in added symbol-file %s"),
619 bfd_get_filename (abfd
));
623 lower_offset
= bfd_section_vma (bfd_get_filename (abfd
), lower_sect
);
625 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
626 in ABFD. Section names are not unique - there can be multiple sections of
627 the same name. Also the sections of the same name do not have to be
628 adjacent to each other. Some sections may be present only in one of the
629 files. Even sections present in both files do not have to be in the same
632 Use stable sort by name for the sections in both files. Then linearly
633 scan both lists matching as most of the entries as possible. */
635 addrs_sorted
= addrs_section_sort (addrs
);
636 my_cleanup
= make_cleanup (xfree
, addrs_sorted
);
638 abfd_addrs
= build_section_addr_info_from_bfd (abfd
);
639 make_cleanup_free_section_addr_info (abfd_addrs
);
640 abfd_addrs_sorted
= addrs_section_sort (abfd_addrs
);
641 make_cleanup (xfree
, abfd_addrs_sorted
);
643 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and
644 ABFD_ADDRS_SORTED. */
646 addrs_to_abfd_addrs
= xzalloc (sizeof (*addrs_to_abfd_addrs
)
647 * addrs
->num_sections
);
648 make_cleanup (xfree
, addrs_to_abfd_addrs
);
650 while (*addrs_sorted
)
652 const char *sect_name
= addr_section_name ((*addrs_sorted
)->name
);
654 while (*abfd_addrs_sorted
655 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
659 if (*abfd_addrs_sorted
660 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
665 /* Make the found item directly addressable from ADDRS. */
666 index_in_addrs
= *addrs_sorted
- addrs
->other
;
667 gdb_assert (addrs_to_abfd_addrs
[index_in_addrs
] == NULL
);
668 addrs_to_abfd_addrs
[index_in_addrs
] = *abfd_addrs_sorted
;
670 /* Never use the same ABFD entry twice. */
677 /* Calculate offsets for the loadable sections.
678 FIXME! Sections must be in order of increasing loadable section
679 so that contiguous sections can use the lower-offset!!!
681 Adjust offsets if the segments are not contiguous.
682 If the section is contiguous, its offset should be set to
683 the offset of the highest loadable section lower than it
684 (the loadable section directly below it in memory).
685 this_offset = lower_offset = lower_addr - lower_orig_addr */
687 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
689 struct other_sections
*sect
= addrs_to_abfd_addrs
[i
];
693 /* This is the index used by BFD. */
694 addrs
->other
[i
].sectindex
= sect
->sectindex
;
696 if (addrs
->other
[i
].addr
!= 0)
698 addrs
->other
[i
].addr
-= sect
->addr
;
699 lower_offset
= addrs
->other
[i
].addr
;
702 addrs
->other
[i
].addr
= lower_offset
;
706 /* addr_section_name transformation is not used for SECT_NAME. */
707 const char *sect_name
= addrs
->other
[i
].name
;
709 /* This section does not exist in ABFD, which is normally
710 unexpected and we want to issue a warning.
712 However, the ELF prelinker does create a few sections which are
713 marked in the main executable as loadable (they are loaded in
714 memory from the DYNAMIC segment) and yet are not present in
715 separate debug info files. This is fine, and should not cause
716 a warning. Shared libraries contain just the section
717 ".gnu.liblist" but it is not marked as loadable there. There is
718 no other way to identify them than by their name as the sections
719 created by prelink have no special flags.
721 For the sections `.bss' and `.sbss' see addr_section_name. */
723 if (!(strcmp (sect_name
, ".gnu.liblist") == 0
724 || strcmp (sect_name
, ".gnu.conflict") == 0
725 || (strcmp (sect_name
, ".bss") == 0
727 && strcmp (addrs
->other
[i
- 1].name
, ".dynbss") == 0
728 && addrs_to_abfd_addrs
[i
- 1] != NULL
)
729 || (strcmp (sect_name
, ".sbss") == 0
731 && strcmp (addrs
->other
[i
- 1].name
, ".sdynbss") == 0
732 && addrs_to_abfd_addrs
[i
- 1] != NULL
)))
733 warning (_("section %s not found in %s"), sect_name
,
734 bfd_get_filename (abfd
));
736 addrs
->other
[i
].addr
= 0;
738 /* SECTINDEX is invalid if ADDR is zero. */
742 do_cleanups (my_cleanup
);
745 /* Parse the user's idea of an offset for dynamic linking, into our idea
746 of how to represent it for fast symbol reading. This is the default
747 version of the sym_fns.sym_offsets function for symbol readers that
748 don't need to do anything special. It allocates a section_offsets table
749 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
752 default_symfile_offsets (struct objfile
*objfile
,
753 struct section_addr_info
*addrs
)
755 objfile
->num_sections
= bfd_count_sections (objfile
->obfd
);
756 objfile
->section_offsets
= (struct section_offsets
*)
757 obstack_alloc (&objfile
->objfile_obstack
,
758 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
759 relative_addr_info_to_section_offsets (objfile
->section_offsets
,
760 objfile
->num_sections
, addrs
);
762 /* For relocatable files, all loadable sections will start at zero.
763 The zero is meaningless, so try to pick arbitrary addresses such
764 that no loadable sections overlap. This algorithm is quadratic,
765 but the number of sections in a single object file is generally
767 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
769 struct place_section_arg arg
;
770 bfd
*abfd
= objfile
->obfd
;
773 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
774 /* We do not expect this to happen; just skip this step if the
775 relocatable file has a section with an assigned VMA. */
776 if (bfd_section_vma (abfd
, cur_sec
) != 0)
781 CORE_ADDR
*offsets
= objfile
->section_offsets
->offsets
;
783 /* Pick non-overlapping offsets for sections the user did not
785 arg
.offsets
= objfile
->section_offsets
;
787 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
789 /* Correctly filling in the section offsets is not quite
790 enough. Relocatable files have two properties that
791 (most) shared objects do not:
793 - Their debug information will contain relocations. Some
794 shared libraries do also, but many do not, so this can not
797 - If there are multiple code sections they will be loaded
798 at different relative addresses in memory than they are
799 in the objfile, since all sections in the file will start
802 Because GDB has very limited ability to map from an
803 address in debug info to the correct code section,
804 it relies on adding SECT_OFF_TEXT to things which might be
805 code. If we clear all the section offsets, and set the
806 section VMAs instead, then symfile_relocate_debug_section
807 will return meaningful debug information pointing at the
810 GDB has too many different data structures for section
811 addresses - a bfd, objfile, and so_list all have section
812 tables, as does exec_ops. Some of these could probably
815 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
816 cur_sec
= cur_sec
->next
)
818 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
821 bfd_set_section_vma (abfd
, cur_sec
, offsets
[cur_sec
->index
]);
822 exec_set_section_address (bfd_get_filename (abfd
),
824 offsets
[cur_sec
->index
]);
825 offsets
[cur_sec
->index
] = 0;
830 /* Remember the bfd indexes for the .text, .data, .bss and
832 init_objfile_sect_indices (objfile
);
836 /* Divide the file into segments, which are individual relocatable units.
837 This is the default version of the sym_fns.sym_segments function for
838 symbol readers that do not have an explicit representation of segments.
839 It assumes that object files do not have segments, and fully linked
840 files have a single segment. */
842 struct symfile_segment_data
*
843 default_symfile_segments (bfd
*abfd
)
847 struct symfile_segment_data
*data
;
850 /* Relocatable files contain enough information to position each
851 loadable section independently; they should not be relocated
853 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
856 /* Make sure there is at least one loadable section in the file. */
857 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
859 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
867 low
= bfd_get_section_vma (abfd
, sect
);
868 high
= low
+ bfd_get_section_size (sect
);
870 data
= XZALLOC (struct symfile_segment_data
);
871 data
->num_segments
= 1;
872 data
->segment_bases
= XCALLOC (1, CORE_ADDR
);
873 data
->segment_sizes
= XCALLOC (1, CORE_ADDR
);
875 num_sections
= bfd_count_sections (abfd
);
876 data
->segment_info
= XCALLOC (num_sections
, int);
878 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
882 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
885 vma
= bfd_get_section_vma (abfd
, sect
);
888 if (vma
+ bfd_get_section_size (sect
) > high
)
889 high
= vma
+ bfd_get_section_size (sect
);
891 data
->segment_info
[i
] = 1;
894 data
->segment_bases
[0] = low
;
895 data
->segment_sizes
[0] = high
- low
;
900 /* Process a symbol file, as either the main file or as a dynamically
903 OBJFILE is where the symbols are to be read from.
905 ADDRS is the list of section load addresses. If the user has given
906 an 'add-symbol-file' command, then this is the list of offsets and
907 addresses he or she provided as arguments to the command; or, if
908 we're handling a shared library, these are the actual addresses the
909 sections are loaded at, according to the inferior's dynamic linker
910 (as gleaned by GDB's shared library code). We convert each address
911 into an offset from the section VMA's as it appears in the object
912 file, and then call the file's sym_offsets function to convert this
913 into a format-specific offset table --- a `struct section_offsets'.
914 If ADDRS is non-zero, OFFSETS must be zero.
916 OFFSETS is a table of section offsets already in the right
917 format-specific representation. NUM_OFFSETS is the number of
918 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
919 assume this is the proper table the call to sym_offsets described
920 above would produce. Instead of calling sym_offsets, we just dump
921 it right into objfile->section_offsets. (When we're re-reading
922 symbols from an objfile, we don't have the original load address
923 list any more; all we have is the section offset table.) If
924 OFFSETS is non-zero, ADDRS must be zero.
926 ADD_FLAGS encodes verbosity level, whether this is main symbol or
927 an extra symbol file such as dynamically loaded code, and wether
928 breakpoint reset should be deferred. */
931 syms_from_objfile (struct objfile
*objfile
,
932 struct section_addr_info
*addrs
,
933 struct section_offsets
*offsets
,
937 struct section_addr_info
*local_addr
= NULL
;
938 struct cleanup
*old_chain
;
939 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
941 gdb_assert (! (addrs
&& offsets
));
943 init_entry_point_info (objfile
);
944 objfile
->sf
= find_sym_fns (objfile
->obfd
);
946 if (objfile
->sf
== NULL
)
947 return; /* No symbols. */
949 /* Make sure that partially constructed symbol tables will be cleaned up
950 if an error occurs during symbol reading. */
951 old_chain
= make_cleanup_free_objfile (objfile
);
953 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
954 list. We now establish the convention that an addr of zero means
955 no load address was specified. */
956 if (! addrs
&& ! offsets
)
959 = alloc_section_addr_info (bfd_count_sections (objfile
->obfd
));
960 make_cleanup (xfree
, local_addr
);
964 /* Now either addrs or offsets is non-zero. */
968 /* We will modify the main symbol table, make sure that all its users
969 will be cleaned up if an error occurs during symbol reading. */
970 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
972 /* Since no error yet, throw away the old symbol table. */
974 if (symfile_objfile
!= NULL
)
976 free_objfile (symfile_objfile
);
977 gdb_assert (symfile_objfile
== NULL
);
980 /* Currently we keep symbols from the add-symbol-file command.
981 If the user wants to get rid of them, they should do "symbol-file"
982 without arguments first. Not sure this is the best behavior
985 (*objfile
->sf
->sym_new_init
) (objfile
);
988 /* Convert addr into an offset rather than an absolute address.
989 We find the lowest address of a loaded segment in the objfile,
990 and assume that <addr> is where that got loaded.
992 We no longer warn if the lowest section is not a text segment (as
993 happens for the PA64 port. */
994 if (addrs
&& addrs
->other
[0].name
)
995 addr_info_make_relative (addrs
, objfile
->obfd
);
997 /* Initialize symbol reading routines for this objfile, allow complaints to
998 appear for this new file, and record how verbose to be, then do the
999 initial symbol reading for this file. */
1001 (*objfile
->sf
->sym_init
) (objfile
);
1002 clear_complaints (&symfile_complaints
, 1, add_flags
& SYMFILE_VERBOSE
);
1005 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
1008 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_offsets
);
1010 /* Just copy in the offset table directly as given to us. */
1011 objfile
->num_sections
= num_offsets
;
1012 objfile
->section_offsets
1013 = ((struct section_offsets
*)
1014 obstack_alloc (&objfile
->objfile_obstack
, size
));
1015 memcpy (objfile
->section_offsets
, offsets
, size
);
1017 init_objfile_sect_indices (objfile
);
1020 (*objfile
->sf
->sym_read
) (objfile
, add_flags
);
1022 if ((add_flags
& SYMFILE_NO_READ
) == 0)
1023 require_partial_symbols (objfile
, 0);
1025 /* Discard cleanups as symbol reading was successful. */
1027 discard_cleanups (old_chain
);
1031 /* Perform required actions after either reading in the initial
1032 symbols for a new objfile, or mapping in the symbols from a reusable
1033 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
1036 new_symfile_objfile (struct objfile
*objfile
, int add_flags
)
1038 /* If this is the main symbol file we have to clean up all users of the
1039 old main symbol file. Otherwise it is sufficient to fixup all the
1040 breakpoints that may have been redefined by this symbol file. */
1041 if (add_flags
& SYMFILE_MAINLINE
)
1043 /* OK, make it the "real" symbol file. */
1044 symfile_objfile
= objfile
;
1046 clear_symtab_users (add_flags
);
1048 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
1050 breakpoint_re_set ();
1053 /* We're done reading the symbol file; finish off complaints. */
1054 clear_complaints (&symfile_complaints
, 0, add_flags
& SYMFILE_VERBOSE
);
1057 /* Process a symbol file, as either the main file or as a dynamically
1060 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1061 This BFD will be closed on error, and is always consumed by this function.
1063 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1064 extra, such as dynamically loaded code, and what to do with breakpoins.
1066 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
1067 syms_from_objfile, above.
1068 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1070 Upon success, returns a pointer to the objfile that was added.
1071 Upon failure, jumps back to command level (never returns). */
1073 static struct objfile
*
1074 symbol_file_add_with_addrs_or_offsets (bfd
*abfd
,
1076 struct section_addr_info
*addrs
,
1077 struct section_offsets
*offsets
,
1081 struct objfile
*objfile
;
1082 struct cleanup
*my_cleanups
;
1083 const char *name
= bfd_get_filename (abfd
);
1084 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1085 const int should_print
= ((from_tty
|| info_verbose
)
1086 && (readnow_symbol_files
1087 || (add_flags
& SYMFILE_NO_READ
) == 0));
1089 if (readnow_symbol_files
)
1091 flags
|= OBJF_READNOW
;
1092 add_flags
&= ~SYMFILE_NO_READ
;
1095 my_cleanups
= make_cleanup_bfd_close (abfd
);
1097 /* Give user a chance to burp if we'd be
1098 interactively wiping out any existing symbols. */
1100 if ((have_full_symbols () || have_partial_symbols ())
1101 && (add_flags
& SYMFILE_MAINLINE
)
1103 && !query (_("Load new symbol table from \"%s\"? "), name
))
1104 error (_("Not confirmed."));
1106 objfile
= allocate_objfile (abfd
, flags
);
1107 discard_cleanups (my_cleanups
);
1109 /* We either created a new mapped symbol table, mapped an existing
1110 symbol table file which has not had initial symbol reading
1111 performed, or need to read an unmapped symbol table. */
1114 if (deprecated_pre_add_symbol_hook
)
1115 deprecated_pre_add_symbol_hook (name
);
1118 printf_unfiltered (_("Reading symbols from %s..."), name
);
1120 gdb_flush (gdb_stdout
);
1123 syms_from_objfile (objfile
, addrs
, offsets
, num_offsets
,
1126 /* We now have at least a partial symbol table. Check to see if the
1127 user requested that all symbols be read on initial access via either
1128 the gdb startup command line or on a per symbol file basis. Expand
1129 all partial symbol tables for this objfile if so. */
1131 if ((flags
& OBJF_READNOW
))
1135 printf_unfiltered (_("expanding to full symbols..."));
1137 gdb_flush (gdb_stdout
);
1141 objfile
->sf
->qf
->expand_all_symtabs (objfile
);
1144 if (should_print
&& !objfile_has_symbols (objfile
))
1147 printf_unfiltered (_("(no debugging symbols found)..."));
1153 if (deprecated_post_add_symbol_hook
)
1154 deprecated_post_add_symbol_hook ();
1156 printf_unfiltered (_("done.\n"));
1159 /* We print some messages regardless of whether 'from_tty ||
1160 info_verbose' is true, so make sure they go out at the right
1162 gdb_flush (gdb_stdout
);
1164 do_cleanups (my_cleanups
);
1166 if (objfile
->sf
== NULL
)
1168 observer_notify_new_objfile (objfile
);
1169 return objfile
; /* No symbols. */
1172 new_symfile_objfile (objfile
, add_flags
);
1174 observer_notify_new_objfile (objfile
);
1176 bfd_cache_close_all ();
1180 /* Add BFD as a separate debug file for OBJFILE. */
1183 symbol_file_add_separate (bfd
*bfd
, int symfile_flags
, struct objfile
*objfile
)
1185 struct objfile
*new_objfile
;
1186 struct section_addr_info
*sap
;
1187 struct cleanup
*my_cleanup
;
1189 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1190 because sections of BFD may not match sections of OBJFILE and because
1191 vma may have been modified by tools such as prelink. */
1192 sap
= build_section_addr_info_from_objfile (objfile
);
1193 my_cleanup
= make_cleanup_free_section_addr_info (sap
);
1195 new_objfile
= symbol_file_add_with_addrs_or_offsets
1196 (bfd
, symfile_flags
,
1198 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1199 | OBJF_USERLOADED
));
1201 do_cleanups (my_cleanup
);
1203 add_separate_debug_objfile (new_objfile
, objfile
);
1206 /* Process the symbol file ABFD, as either the main file or as a
1207 dynamically loaded file.
1209 See symbol_file_add_with_addrs_or_offsets's comments for
1212 symbol_file_add_from_bfd (bfd
*abfd
, int add_flags
,
1213 struct section_addr_info
*addrs
,
1216 return symbol_file_add_with_addrs_or_offsets (abfd
, add_flags
, addrs
, 0, 0,
1221 /* Process a symbol file, as either the main file or as a dynamically
1222 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
1225 symbol_file_add (char *name
, int add_flags
, struct section_addr_info
*addrs
,
1228 return symbol_file_add_from_bfd (symfile_bfd_open (name
), add_flags
, addrs
,
1233 /* Call symbol_file_add() with default values and update whatever is
1234 affected by the loading of a new main().
1235 Used when the file is supplied in the gdb command line
1236 and by some targets with special loading requirements.
1237 The auxiliary function, symbol_file_add_main_1(), has the flags
1238 argument for the switches that can only be specified in the symbol_file
1242 symbol_file_add_main (char *args
, int from_tty
)
1244 symbol_file_add_main_1 (args
, from_tty
, 0);
1248 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
1250 const int add_flags
= SYMFILE_MAINLINE
| (from_tty
? SYMFILE_VERBOSE
: 0);
1251 symbol_file_add (args
, add_flags
, NULL
, flags
);
1253 /* Getting new symbols may change our opinion about
1254 what is frameless. */
1255 reinit_frame_cache ();
1257 set_initial_language ();
1261 symbol_file_clear (int from_tty
)
1263 if ((have_full_symbols () || have_partial_symbols ())
1266 ? !query (_("Discard symbol table from `%s'? "),
1267 symfile_objfile
->name
)
1268 : !query (_("Discard symbol table? "))))
1269 error (_("Not confirmed."));
1271 /* solib descriptors may have handles to objfiles. Wipe them before their
1272 objfiles get stale by free_all_objfiles. */
1273 no_shared_libraries (NULL
, from_tty
);
1275 free_all_objfiles ();
1277 gdb_assert (symfile_objfile
== NULL
);
1279 printf_unfiltered (_("No symbol file now.\n"));
1283 get_debug_link_info (struct objfile
*objfile
, unsigned long *crc32_out
)
1286 bfd_size_type debuglink_size
;
1287 unsigned long crc32
;
1291 sect
= bfd_get_section_by_name (objfile
->obfd
, ".gnu_debuglink");
1296 debuglink_size
= bfd_section_size (objfile
->obfd
, sect
);
1298 contents
= xmalloc (debuglink_size
);
1299 bfd_get_section_contents (objfile
->obfd
, sect
, contents
,
1300 (file_ptr
)0, (bfd_size_type
)debuglink_size
);
1302 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1303 crc_offset
= strlen (contents
) + 1;
1304 crc_offset
= (crc_offset
+ 3) & ~3;
1306 crc32
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) (contents
+ crc_offset
));
1313 separate_debug_file_exists (const char *name
, unsigned long crc
,
1314 struct objfile
*parent_objfile
)
1316 unsigned long file_crc
= 0;
1318 gdb_byte buffer
[8*1024];
1320 struct stat parent_stat
, abfd_stat
;
1322 /* Find a separate debug info file as if symbols would be present in
1323 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1324 section can contain just the basename of PARENT_OBJFILE without any
1325 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1326 the separate debug infos with the same basename can exist. */
1328 if (strcmp (name
, parent_objfile
->name
) == 0)
1331 abfd
= bfd_open_maybe_remote (name
);
1336 /* Verify symlinks were not the cause of strcmp name difference above.
1338 Some operating systems, e.g. Windows, do not provide a meaningful
1339 st_ino; they always set it to zero. (Windows does provide a
1340 meaningful st_dev.) Do not indicate a duplicate library in that
1341 case. While there is no guarantee that a system that provides
1342 meaningful inode numbers will never set st_ino to zero, this is
1343 merely an optimization, so we do not need to worry about false
1346 if (bfd_stat (abfd
, &abfd_stat
) == 0
1347 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0
1348 && abfd_stat
.st_dev
== parent_stat
.st_dev
1349 && abfd_stat
.st_ino
== parent_stat
.st_ino
1350 && abfd_stat
.st_ino
!= 0)
1356 while ((count
= bfd_bread (buffer
, sizeof (buffer
), abfd
)) > 0)
1357 file_crc
= gnu_debuglink_crc32 (file_crc
, buffer
, count
);
1361 if (crc
!= file_crc
)
1363 warning (_("the debug information found in \"%s\""
1364 " does not match \"%s\" (CRC mismatch).\n"),
1365 name
, parent_objfile
->name
);
1372 char *debug_file_directory
= NULL
;
1374 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1375 struct cmd_list_element
*c
, const char *value
)
1377 fprintf_filtered (file
,
1378 _("The directory where separate debug "
1379 "symbols are searched for is \"%s\".\n"),
1383 #if ! defined (DEBUG_SUBDIRECTORY)
1384 #define DEBUG_SUBDIRECTORY ".debug"
1388 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1390 char *basename
, *debugdir
;
1392 char *debugfile
= NULL
;
1393 char *canon_name
= NULL
;
1394 unsigned long crc32
;
1397 basename
= get_debug_link_info (objfile
, &crc32
);
1399 if (basename
== NULL
)
1400 /* There's no separate debug info, hence there's no way we could
1401 load it => no warning. */
1402 goto cleanup_return_debugfile
;
1404 dir
= xstrdup (objfile
->name
);
1406 /* Strip off the final filename part, leaving the directory name,
1407 followed by a slash. The directory can be relative or absolute. */
1408 for (i
= strlen(dir
) - 1; i
>= 0; i
--)
1410 if (IS_DIR_SEPARATOR (dir
[i
]))
1413 /* If I is -1 then no directory is present there and DIR will be "". */
1416 /* Set I to max (strlen (canon_name), strlen (dir)). */
1417 canon_name
= lrealpath (dir
);
1419 if (canon_name
&& strlen (canon_name
) > i
)
1420 i
= strlen (canon_name
);
1422 debugfile
= xmalloc (strlen (debug_file_directory
) + 1
1424 + strlen (DEBUG_SUBDIRECTORY
)
1429 /* First try in the same directory as the original file. */
1430 strcpy (debugfile
, dir
);
1431 strcat (debugfile
, basename
);
1433 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1434 goto cleanup_return_debugfile
;
1436 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1437 strcpy (debugfile
, dir
);
1438 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1439 strcat (debugfile
, "/");
1440 strcat (debugfile
, basename
);
1442 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1443 goto cleanup_return_debugfile
;
1445 /* Then try in the global debugfile directories.
1447 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1448 cause "/..." lookups. */
1450 debugdir
= debug_file_directory
;
1455 while (*debugdir
== DIRNAME_SEPARATOR
)
1458 debugdir_end
= strchr (debugdir
, DIRNAME_SEPARATOR
);
1459 if (debugdir_end
== NULL
)
1460 debugdir_end
= &debugdir
[strlen (debugdir
)];
1462 memcpy (debugfile
, debugdir
, debugdir_end
- debugdir
);
1463 debugfile
[debugdir_end
- debugdir
] = 0;
1464 strcat (debugfile
, "/");
1465 strcat (debugfile
, dir
);
1466 strcat (debugfile
, basename
);
1468 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1469 goto cleanup_return_debugfile
;
1471 /* If the file is in the sysroot, try using its base path in the
1472 global debugfile directory. */
1474 && strncmp (canon_name
, gdb_sysroot
, strlen (gdb_sysroot
)) == 0
1475 && IS_DIR_SEPARATOR (canon_name
[strlen (gdb_sysroot
)]))
1477 memcpy (debugfile
, debugdir
, debugdir_end
- debugdir
);
1478 debugfile
[debugdir_end
- debugdir
] = 0;
1479 strcat (debugfile
, canon_name
+ strlen (gdb_sysroot
));
1480 strcat (debugfile
, "/");
1481 strcat (debugfile
, basename
);
1483 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1484 goto cleanup_return_debugfile
;
1487 debugdir
= debugdir_end
;
1489 while (*debugdir
!= 0);
1494 cleanup_return_debugfile
:
1502 /* This is the symbol-file command. Read the file, analyze its
1503 symbols, and add a struct symtab to a symtab list. The syntax of
1504 the command is rather bizarre:
1506 1. The function buildargv implements various quoting conventions
1507 which are undocumented and have little or nothing in common with
1508 the way things are quoted (or not quoted) elsewhere in GDB.
1510 2. Options are used, which are not generally used in GDB (perhaps
1511 "set mapped on", "set readnow on" would be better)
1513 3. The order of options matters, which is contrary to GNU
1514 conventions (because it is confusing and inconvenient). */
1517 symbol_file_command (char *args
, int from_tty
)
1523 symbol_file_clear (from_tty
);
1527 char **argv
= gdb_buildargv (args
);
1528 int flags
= OBJF_USERLOADED
;
1529 struct cleanup
*cleanups
;
1532 cleanups
= make_cleanup_freeargv (argv
);
1533 while (*argv
!= NULL
)
1535 if (strcmp (*argv
, "-readnow") == 0)
1536 flags
|= OBJF_READNOW
;
1537 else if (**argv
== '-')
1538 error (_("unknown option `%s'"), *argv
);
1541 symbol_file_add_main_1 (*argv
, from_tty
, flags
);
1549 error (_("no symbol file name was specified"));
1551 do_cleanups (cleanups
);
1555 /* Set the initial language.
1557 FIXME: A better solution would be to record the language in the
1558 psymtab when reading partial symbols, and then use it (if known) to
1559 set the language. This would be a win for formats that encode the
1560 language in an easily discoverable place, such as DWARF. For
1561 stabs, we can jump through hoops looking for specially named
1562 symbols or try to intuit the language from the specific type of
1563 stabs we find, but we can't do that until later when we read in
1567 set_initial_language (void)
1569 enum language lang
= language_unknown
;
1571 if (language_of_main
!= language_unknown
)
1572 lang
= language_of_main
;
1575 const char *filename
;
1577 filename
= find_main_filename ();
1578 if (filename
!= NULL
)
1579 lang
= deduce_language_from_filename (filename
);
1582 if (lang
== language_unknown
)
1584 /* Make C the default language */
1588 set_language (lang
);
1589 expected_language
= current_language
; /* Don't warn the user. */
1592 /* If NAME is a remote name open the file using remote protocol, otherwise
1593 open it normally. */
1596 bfd_open_maybe_remote (const char *name
)
1598 if (remote_filename_p (name
))
1599 return remote_bfd_open (name
, gnutarget
);
1601 return bfd_openr (name
, gnutarget
);
1605 /* Open the file specified by NAME and hand it off to BFD for
1606 preliminary analysis. Return a newly initialized bfd *, which
1607 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1608 absolute). In case of trouble, error() is called. */
1611 symfile_bfd_open (char *name
)
1615 char *absolute_name
;
1617 if (remote_filename_p (name
))
1619 name
= xstrdup (name
);
1620 sym_bfd
= remote_bfd_open (name
, gnutarget
);
1623 make_cleanup (xfree
, name
);
1624 error (_("`%s': can't open to read symbols: %s."), name
,
1625 bfd_errmsg (bfd_get_error ()));
1628 if (!bfd_check_format (sym_bfd
, bfd_object
))
1630 bfd_close (sym_bfd
);
1631 make_cleanup (xfree
, name
);
1632 error (_("`%s': can't read symbols: %s."), name
,
1633 bfd_errmsg (bfd_get_error ()));
1639 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy. */
1641 /* Look down path for it, allocate 2nd new malloc'd copy. */
1642 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, name
,
1643 O_RDONLY
| O_BINARY
, &absolute_name
);
1644 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1647 char *exename
= alloca (strlen (name
) + 5);
1649 strcat (strcpy (exename
, name
), ".exe");
1650 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, exename
,
1651 O_RDONLY
| O_BINARY
, &absolute_name
);
1656 make_cleanup (xfree
, name
);
1657 perror_with_name (name
);
1660 /* Free 1st new malloc'd copy, but keep the 2nd malloc'd copy in
1661 bfd. It'll be freed in free_objfile(). */
1663 name
= absolute_name
;
1665 sym_bfd
= bfd_fopen (name
, gnutarget
, FOPEN_RB
, desc
);
1669 make_cleanup (xfree
, name
);
1670 error (_("`%s': can't open to read symbols: %s."), name
,
1671 bfd_errmsg (bfd_get_error ()));
1673 bfd_set_cacheable (sym_bfd
, 1);
1675 if (!bfd_check_format (sym_bfd
, bfd_object
))
1677 /* FIXME: should be checking for errors from bfd_close (for one
1678 thing, on error it does not free all the storage associated
1680 bfd_close (sym_bfd
); /* This also closes desc. */
1681 make_cleanup (xfree
, name
);
1682 error (_("`%s': can't read symbols: %s."), name
,
1683 bfd_errmsg (bfd_get_error ()));
1686 /* bfd_usrdata exists for applications and libbfd must not touch it. */
1687 gdb_assert (bfd_usrdata (sym_bfd
) == NULL
);
1692 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1693 the section was not found. */
1696 get_section_index (struct objfile
*objfile
, char *section_name
)
1698 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1706 /* Link SF into the global symtab_fns list. Called on startup by the
1707 _initialize routine in each object file format reader, to register
1708 information about each format the reader is prepared to handle. */
1711 add_symtab_fns (const struct sym_fns
*sf
)
1713 VEC_safe_push (sym_fns_ptr
, symtab_fns
, sf
);
1716 /* Initialize OBJFILE to read symbols from its associated BFD. It
1717 either returns or calls error(). The result is an initialized
1718 struct sym_fns in the objfile structure, that contains cached
1719 information about the symbol file. */
1721 static const struct sym_fns
*
1722 find_sym_fns (bfd
*abfd
)
1724 const struct sym_fns
*sf
;
1725 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1728 if (our_flavour
== bfd_target_srec_flavour
1729 || our_flavour
== bfd_target_ihex_flavour
1730 || our_flavour
== bfd_target_tekhex_flavour
)
1731 return NULL
; /* No symbols. */
1733 for (i
= 0; VEC_iterate (sym_fns_ptr
, symtab_fns
, i
, sf
); ++i
)
1734 if (our_flavour
== sf
->sym_flavour
)
1737 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1738 bfd_get_target (abfd
));
1742 /* This function runs the load command of our current target. */
1745 load_command (char *arg
, int from_tty
)
1749 /* The user might be reloading because the binary has changed. Take
1750 this opportunity to check. */
1751 reopen_exec_file ();
1759 parg
= arg
= get_exec_file (1);
1761 /* Count how many \ " ' tab space there are in the name. */
1762 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1770 /* We need to quote this string so buildargv can pull it apart. */
1771 char *temp
= xmalloc (strlen (arg
) + count
+ 1 );
1775 make_cleanup (xfree
, temp
);
1778 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1780 strncpy (ptemp
, prev
, parg
- prev
);
1781 ptemp
+= parg
- prev
;
1785 strcpy (ptemp
, prev
);
1791 target_load (arg
, from_tty
);
1793 /* After re-loading the executable, we don't really know which
1794 overlays are mapped any more. */
1795 overlay_cache_invalid
= 1;
1798 /* This version of "load" should be usable for any target. Currently
1799 it is just used for remote targets, not inftarg.c or core files,
1800 on the theory that only in that case is it useful.
1802 Avoiding xmodem and the like seems like a win (a) because we don't have
1803 to worry about finding it, and (b) On VMS, fork() is very slow and so
1804 we don't want to run a subprocess. On the other hand, I'm not sure how
1805 performance compares. */
1807 static int validate_download
= 0;
1809 /* Callback service function for generic_load (bfd_map_over_sections). */
1812 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1814 bfd_size_type
*sum
= data
;
1816 *sum
+= bfd_get_section_size (asec
);
1819 /* Opaque data for load_section_callback. */
1820 struct load_section_data
{
1821 unsigned long load_offset
;
1822 struct load_progress_data
*progress_data
;
1823 VEC(memory_write_request_s
) *requests
;
1826 /* Opaque data for load_progress. */
1827 struct load_progress_data
{
1828 /* Cumulative data. */
1829 unsigned long write_count
;
1830 unsigned long data_count
;
1831 bfd_size_type total_size
;
1834 /* Opaque data for load_progress for a single section. */
1835 struct load_progress_section_data
{
1836 struct load_progress_data
*cumulative
;
1838 /* Per-section data. */
1839 const char *section_name
;
1840 ULONGEST section_sent
;
1841 ULONGEST section_size
;
1846 /* Target write callback routine for progress reporting. */
1849 load_progress (ULONGEST bytes
, void *untyped_arg
)
1851 struct load_progress_section_data
*args
= untyped_arg
;
1852 struct load_progress_data
*totals
;
1855 /* Writing padding data. No easy way to get at the cumulative
1856 stats, so just ignore this. */
1859 totals
= args
->cumulative
;
1861 if (bytes
== 0 && args
->section_sent
== 0)
1863 /* The write is just starting. Let the user know we've started
1865 ui_out_message (uiout
, 0, "Loading section %s, size %s lma %s\n",
1866 args
->section_name
, hex_string (args
->section_size
),
1867 paddress (target_gdbarch
, args
->lma
));
1871 if (validate_download
)
1873 /* Broken memories and broken monitors manifest themselves here
1874 when bring new computers to life. This doubles already slow
1876 /* NOTE: cagney/1999-10-18: A more efficient implementation
1877 might add a verify_memory() method to the target vector and
1878 then use that. remote.c could implement that method using
1879 the ``qCRC'' packet. */
1880 gdb_byte
*check
= xmalloc (bytes
);
1881 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
1883 if (target_read_memory (args
->lma
, check
, bytes
) != 0)
1884 error (_("Download verify read failed at %s"),
1885 paddress (target_gdbarch
, args
->lma
));
1886 if (memcmp (args
->buffer
, check
, bytes
) != 0)
1887 error (_("Download verify compare failed at %s"),
1888 paddress (target_gdbarch
, args
->lma
));
1889 do_cleanups (verify_cleanups
);
1891 totals
->data_count
+= bytes
;
1893 args
->buffer
+= bytes
;
1894 totals
->write_count
+= 1;
1895 args
->section_sent
+= bytes
;
1897 || (deprecated_ui_load_progress_hook
!= NULL
1898 && deprecated_ui_load_progress_hook (args
->section_name
,
1899 args
->section_sent
)))
1900 error (_("Canceled the download"));
1902 if (deprecated_show_load_progress
!= NULL
)
1903 deprecated_show_load_progress (args
->section_name
,
1907 totals
->total_size
);
1910 /* Callback service function for generic_load (bfd_map_over_sections). */
1913 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1915 struct memory_write_request
*new_request
;
1916 struct load_section_data
*args
= data
;
1917 struct load_progress_section_data
*section_data
;
1918 bfd_size_type size
= bfd_get_section_size (asec
);
1920 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1922 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
1928 new_request
= VEC_safe_push (memory_write_request_s
,
1929 args
->requests
, NULL
);
1930 memset (new_request
, 0, sizeof (struct memory_write_request
));
1931 section_data
= xcalloc (1, sizeof (struct load_progress_section_data
));
1932 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1933 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size
1935 new_request
->data
= xmalloc (size
);
1936 new_request
->baton
= section_data
;
1938 buffer
= new_request
->data
;
1940 section_data
->cumulative
= args
->progress_data
;
1941 section_data
->section_name
= sect_name
;
1942 section_data
->section_size
= size
;
1943 section_data
->lma
= new_request
->begin
;
1944 section_data
->buffer
= buffer
;
1946 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1949 /* Clean up an entire memory request vector, including load
1950 data and progress records. */
1953 clear_memory_write_data (void *arg
)
1955 VEC(memory_write_request_s
) **vec_p
= arg
;
1956 VEC(memory_write_request_s
) *vec
= *vec_p
;
1958 struct memory_write_request
*mr
;
1960 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
1965 VEC_free (memory_write_request_s
, vec
);
1969 generic_load (char *args
, int from_tty
)
1972 struct timeval start_time
, end_time
;
1974 struct cleanup
*old_cleanups
= make_cleanup (null_cleanup
, 0);
1975 struct load_section_data cbdata
;
1976 struct load_progress_data total_progress
;
1981 memset (&cbdata
, 0, sizeof (cbdata
));
1982 memset (&total_progress
, 0, sizeof (total_progress
));
1983 cbdata
.progress_data
= &total_progress
;
1985 make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
1988 error_no_arg (_("file to load"));
1990 argv
= gdb_buildargv (args
);
1991 make_cleanup_freeargv (argv
);
1993 filename
= tilde_expand (argv
[0]);
1994 make_cleanup (xfree
, filename
);
1996 if (argv
[1] != NULL
)
2000 cbdata
.load_offset
= strtoul (argv
[1], &endptr
, 0);
2002 /* If the last word was not a valid number then
2003 treat it as a file name with spaces in. */
2004 if (argv
[1] == endptr
)
2005 error (_("Invalid download offset:%s."), argv
[1]);
2007 if (argv
[2] != NULL
)
2008 error (_("Too many parameters."));
2011 /* Open the file for loading. */
2012 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
2013 if (loadfile_bfd
== NULL
)
2015 perror_with_name (filename
);
2019 /* FIXME: should be checking for errors from bfd_close (for one thing,
2020 on error it does not free all the storage associated with the
2022 make_cleanup_bfd_close (loadfile_bfd
);
2024 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
2026 error (_("\"%s\" is not an object file: %s"), filename
,
2027 bfd_errmsg (bfd_get_error ()));
2030 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
2031 (void *) &total_progress
.total_size
);
2033 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
2035 gettimeofday (&start_time
, NULL
);
2037 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2038 load_progress
) != 0)
2039 error (_("Load failed"));
2041 gettimeofday (&end_time
, NULL
);
2043 entry
= bfd_get_start_address (loadfile_bfd
);
2044 ui_out_text (uiout
, "Start address ");
2045 ui_out_field_fmt (uiout
, "address", "%s", paddress (target_gdbarch
, entry
));
2046 ui_out_text (uiout
, ", load size ");
2047 ui_out_field_fmt (uiout
, "load-size", "%lu", total_progress
.data_count
);
2048 ui_out_text (uiout
, "\n");
2049 /* We were doing this in remote-mips.c, I suspect it is right
2050 for other targets too. */
2051 regcache_write_pc (get_current_regcache (), entry
);
2053 /* Reset breakpoints, now that we have changed the load image. For
2054 instance, breakpoints may have been set (or reset, by
2055 post_create_inferior) while connected to the target but before we
2056 loaded the program. In that case, the prologue analyzer could
2057 have read instructions from the target to find the right
2058 breakpoint locations. Loading has changed the contents of that
2061 breakpoint_re_set ();
2063 /* FIXME: are we supposed to call symbol_file_add or not? According
2064 to a comment from remote-mips.c (where a call to symbol_file_add
2065 was commented out), making the call confuses GDB if more than one
2066 file is loaded in. Some targets do (e.g., remote-vx.c) but
2067 others don't (or didn't - perhaps they have all been deleted). */
2069 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2070 total_progress
.write_count
,
2071 &start_time
, &end_time
);
2073 do_cleanups (old_cleanups
);
2076 /* Report how fast the transfer went. */
2078 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
2079 replaced by print_transfer_performance (with a very different
2080 function signature). */
2083 report_transfer_performance (unsigned long data_count
, time_t start_time
,
2086 struct timeval start
, end
;
2088 start
.tv_sec
= start_time
;
2090 end
.tv_sec
= end_time
;
2093 print_transfer_performance (gdb_stdout
, data_count
, 0, &start
, &end
);
2097 print_transfer_performance (struct ui_file
*stream
,
2098 unsigned long data_count
,
2099 unsigned long write_count
,
2100 const struct timeval
*start_time
,
2101 const struct timeval
*end_time
)
2103 ULONGEST time_count
;
2105 /* Compute the elapsed time in milliseconds, as a tradeoff between
2106 accuracy and overflow. */
2107 time_count
= (end_time
->tv_sec
- start_time
->tv_sec
) * 1000;
2108 time_count
+= (end_time
->tv_usec
- start_time
->tv_usec
) / 1000;
2110 ui_out_text (uiout
, "Transfer rate: ");
2113 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / time_count
;
2115 if (ui_out_is_mi_like_p (uiout
))
2117 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
* 8);
2118 ui_out_text (uiout
, " bits/sec");
2120 else if (rate
< 1024)
2122 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
);
2123 ui_out_text (uiout
, " bytes/sec");
2127 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
/ 1024);
2128 ui_out_text (uiout
, " KB/sec");
2133 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
2134 ui_out_text (uiout
, " bits in <1 sec");
2136 if (write_count
> 0)
2138 ui_out_text (uiout
, ", ");
2139 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
2140 ui_out_text (uiout
, " bytes/write");
2142 ui_out_text (uiout
, ".\n");
2145 /* This function allows the addition of incrementally linked object files.
2146 It does not modify any state in the target, only in the debugger. */
2147 /* Note: ezannoni 2000-04-13 This function/command used to have a
2148 special case syntax for the rombug target (Rombug is the boot
2149 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2150 rombug case, the user doesn't need to supply a text address,
2151 instead a call to target_link() (in target.c) would supply the
2152 value to use. We are now discontinuing this type of ad hoc syntax. */
2155 add_symbol_file_command (char *args
, int from_tty
)
2157 struct gdbarch
*gdbarch
= get_current_arch ();
2158 char *filename
= NULL
;
2159 int flags
= OBJF_USERLOADED
;
2161 int section_index
= 0;
2165 int expecting_sec_name
= 0;
2166 int expecting_sec_addr
= 0;
2175 struct section_addr_info
*section_addrs
;
2176 struct sect_opt
*sect_opts
= NULL
;
2177 size_t num_sect_opts
= 0;
2178 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2181 sect_opts
= (struct sect_opt
*) xmalloc (num_sect_opts
2182 * sizeof (struct sect_opt
));
2187 error (_("add-symbol-file takes a file name and an address"));
2189 argv
= gdb_buildargv (args
);
2190 make_cleanup_freeargv (argv
);
2192 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2194 /* Process the argument. */
2197 /* The first argument is the file name. */
2198 filename
= tilde_expand (arg
);
2199 make_cleanup (xfree
, filename
);
2204 /* The second argument is always the text address at which
2205 to load the program. */
2206 sect_opts
[section_index
].name
= ".text";
2207 sect_opts
[section_index
].value
= arg
;
2208 if (++section_index
>= num_sect_opts
)
2211 sect_opts
= ((struct sect_opt
*)
2212 xrealloc (sect_opts
,
2214 * sizeof (struct sect_opt
)));
2219 /* It's an option (starting with '-') or it's an argument
2224 if (strcmp (arg
, "-readnow") == 0)
2225 flags
|= OBJF_READNOW
;
2226 else if (strcmp (arg
, "-s") == 0)
2228 expecting_sec_name
= 1;
2229 expecting_sec_addr
= 1;
2234 if (expecting_sec_name
)
2236 sect_opts
[section_index
].name
= arg
;
2237 expecting_sec_name
= 0;
2240 if (expecting_sec_addr
)
2242 sect_opts
[section_index
].value
= arg
;
2243 expecting_sec_addr
= 0;
2244 if (++section_index
>= num_sect_opts
)
2247 sect_opts
= ((struct sect_opt
*)
2248 xrealloc (sect_opts
,
2250 * sizeof (struct sect_opt
)));
2254 error (_("USAGE: add-symbol-file <filename> <textaddress>"
2255 " [-mapped] [-readnow] [-s <secname> <addr>]*"));
2260 /* This command takes at least two arguments. The first one is a
2261 filename, and the second is the address where this file has been
2262 loaded. Abort now if this address hasn't been provided by the
2264 if (section_index
< 1)
2265 error (_("The address where %s has been loaded is missing"), filename
);
2267 /* Print the prompt for the query below. And save the arguments into
2268 a sect_addr_info structure to be passed around to other
2269 functions. We have to split this up into separate print
2270 statements because hex_string returns a local static
2273 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename
);
2274 section_addrs
= alloc_section_addr_info (section_index
);
2275 make_cleanup (xfree
, section_addrs
);
2276 for (i
= 0; i
< section_index
; i
++)
2279 char *val
= sect_opts
[i
].value
;
2280 char *sec
= sect_opts
[i
].name
;
2282 addr
= parse_and_eval_address (val
);
2284 /* Here we store the section offsets in the order they were
2285 entered on the command line. */
2286 section_addrs
->other
[sec_num
].name
= sec
;
2287 section_addrs
->other
[sec_num
].addr
= addr
;
2288 printf_unfiltered ("\t%s_addr = %s\n", sec
,
2289 paddress (gdbarch
, addr
));
2292 /* The object's sections are initialized when a
2293 call is made to build_objfile_section_table (objfile).
2294 This happens in reread_symbols.
2295 At this point, we don't know what file type this is,
2296 so we can't determine what section names are valid. */
2299 if (from_tty
&& (!query ("%s", "")))
2300 error (_("Not confirmed."));
2302 symbol_file_add (filename
, from_tty
? SYMFILE_VERBOSE
: 0,
2303 section_addrs
, flags
);
2305 /* Getting new symbols may change our opinion about what is
2307 reinit_frame_cache ();
2308 do_cleanups (my_cleanups
);
2312 /* Re-read symbols if a symbol-file has changed. */
2314 reread_symbols (void)
2316 struct objfile
*objfile
;
2319 struct stat new_statbuf
;
2322 /* With the addition of shared libraries, this should be modified,
2323 the load time should be saved in the partial symbol tables, since
2324 different tables may come from different source files. FIXME.
2325 This routine should then walk down each partial symbol table
2326 and see if the symbol table that it originates from has been changed. */
2328 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2330 /* solib-sunos.c creates one objfile with obfd. */
2331 if (objfile
->obfd
== NULL
)
2334 /* Separate debug objfiles are handled in the main objfile. */
2335 if (objfile
->separate_debug_objfile_backlink
)
2338 /* If this object is from an archive (what you usually create with
2339 `ar', often called a `static library' on most systems, though
2340 a `shared library' on AIX is also an archive), then you should
2341 stat on the archive name, not member name. */
2342 if (objfile
->obfd
->my_archive
)
2343 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2345 res
= stat (objfile
->name
, &new_statbuf
);
2348 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2349 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2353 new_modtime
= new_statbuf
.st_mtime
;
2354 if (new_modtime
!= objfile
->mtime
)
2356 struct cleanup
*old_cleanups
;
2357 struct section_offsets
*offsets
;
2359 char *obfd_filename
;
2361 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2364 /* There are various functions like symbol_file_add,
2365 symfile_bfd_open, syms_from_objfile, etc., which might
2366 appear to do what we want. But they have various other
2367 effects which we *don't* want. So we just do stuff
2368 ourselves. We don't worry about mapped files (for one thing,
2369 any mapped file will be out of date). */
2371 /* If we get an error, blow away this objfile (not sure if
2372 that is the correct response for things like shared
2374 old_cleanups
= make_cleanup_free_objfile (objfile
);
2375 /* We need to do this whenever any symbols go away. */
2376 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2378 if (exec_bfd
!= NULL
&& strcmp (bfd_get_filename (objfile
->obfd
),
2379 bfd_get_filename (exec_bfd
)) == 0)
2381 /* Reload EXEC_BFD without asking anything. */
2383 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2386 /* Clean up any state BFD has sitting around. We don't need
2387 to close the descriptor but BFD lacks a way of closing the
2388 BFD without closing the descriptor. */
2389 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2390 if (!bfd_close (objfile
->obfd
))
2391 error (_("Can't close BFD for %s: %s"), objfile
->name
,
2392 bfd_errmsg (bfd_get_error ()));
2393 objfile
->obfd
= bfd_open_maybe_remote (obfd_filename
);
2394 if (objfile
->obfd
== NULL
)
2395 error (_("Can't open %s to read symbols."), objfile
->name
);
2397 objfile
->obfd
= gdb_bfd_ref (objfile
->obfd
);
2398 /* bfd_openr sets cacheable to true, which is what we want. */
2399 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2400 error (_("Can't read symbols from %s: %s."), objfile
->name
,
2401 bfd_errmsg (bfd_get_error ()));
2403 /* Save the offsets, we will nuke them with the rest of the
2405 num_offsets
= objfile
->num_sections
;
2406 offsets
= ((struct section_offsets
*)
2407 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2408 memcpy (offsets
, objfile
->section_offsets
,
2409 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2411 /* Remove any references to this objfile in the global
2413 preserve_values (objfile
);
2415 /* Nuke all the state that we will re-read. Much of the following
2416 code which sets things to NULL really is necessary to tell
2417 other parts of GDB that there is nothing currently there.
2419 Try to keep the freeing order compatible with free_objfile. */
2421 if (objfile
->sf
!= NULL
)
2423 (*objfile
->sf
->sym_finish
) (objfile
);
2426 clear_objfile_data (objfile
);
2428 /* Free the separate debug objfiles. It will be
2429 automatically recreated by sym_read. */
2430 free_objfile_separate_debug (objfile
);
2432 /* FIXME: Do we have to free a whole linked list, or is this
2434 if (objfile
->global_psymbols
.list
)
2435 xfree (objfile
->global_psymbols
.list
);
2436 memset (&objfile
->global_psymbols
, 0,
2437 sizeof (objfile
->global_psymbols
));
2438 if (objfile
->static_psymbols
.list
)
2439 xfree (objfile
->static_psymbols
.list
);
2440 memset (&objfile
->static_psymbols
, 0,
2441 sizeof (objfile
->static_psymbols
));
2443 /* Free the obstacks for non-reusable objfiles. */
2444 psymbol_bcache_free (objfile
->psymbol_cache
);
2445 objfile
->psymbol_cache
= psymbol_bcache_init ();
2446 bcache_xfree (objfile
->macro_cache
);
2447 objfile
->macro_cache
= bcache_xmalloc (NULL
, NULL
);
2448 bcache_xfree (objfile
->filename_cache
);
2449 objfile
->filename_cache
= bcache_xmalloc (NULL
,NULL
);
2450 if (objfile
->demangled_names_hash
!= NULL
)
2452 htab_delete (objfile
->demangled_names_hash
);
2453 objfile
->demangled_names_hash
= NULL
;
2455 obstack_free (&objfile
->objfile_obstack
, 0);
2456 objfile
->sections
= NULL
;
2457 objfile
->symtabs
= NULL
;
2458 objfile
->psymtabs
= NULL
;
2459 objfile
->psymtabs_addrmap
= NULL
;
2460 objfile
->free_psymtabs
= NULL
;
2461 objfile
->cp_namespace_symtab
= NULL
;
2462 objfile
->template_symbols
= NULL
;
2463 objfile
->msymbols
= NULL
;
2464 objfile
->deprecated_sym_private
= NULL
;
2465 objfile
->minimal_symbol_count
= 0;
2466 memset (&objfile
->msymbol_hash
, 0,
2467 sizeof (objfile
->msymbol_hash
));
2468 memset (&objfile
->msymbol_demangled_hash
, 0,
2469 sizeof (objfile
->msymbol_demangled_hash
));
2471 objfile
->psymbol_cache
= psymbol_bcache_init ();
2472 objfile
->macro_cache
= bcache_xmalloc (NULL
, NULL
);
2473 objfile
->filename_cache
= bcache_xmalloc (NULL
, NULL
);
2474 /* obstack_init also initializes the obstack so it is
2475 empty. We could use obstack_specify_allocation but
2476 gdb_obstack.h specifies the alloc/dealloc
2478 obstack_init (&objfile
->objfile_obstack
);
2479 if (build_objfile_section_table (objfile
))
2481 error (_("Can't find the file sections in `%s': %s"),
2482 objfile
->name
, bfd_errmsg (bfd_get_error ()));
2484 terminate_minimal_symbol_table (objfile
);
2486 /* We use the same section offsets as from last time. I'm not
2487 sure whether that is always correct for shared libraries. */
2488 objfile
->section_offsets
= (struct section_offsets
*)
2489 obstack_alloc (&objfile
->objfile_obstack
,
2490 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2491 memcpy (objfile
->section_offsets
, offsets
,
2492 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2493 objfile
->num_sections
= num_offsets
;
2495 /* What the hell is sym_new_init for, anyway? The concept of
2496 distinguishing between the main file and additional files
2497 in this way seems rather dubious. */
2498 if (objfile
== symfile_objfile
)
2500 (*objfile
->sf
->sym_new_init
) (objfile
);
2503 (*objfile
->sf
->sym_init
) (objfile
);
2504 clear_complaints (&symfile_complaints
, 1, 1);
2505 /* Do not set flags as this is safe and we don't want to be
2507 (*objfile
->sf
->sym_read
) (objfile
, 0);
2508 if ((objfile
->flags
& OBJF_PSYMTABS_READ
) != 0)
2510 objfile
->flags
&= ~OBJF_PSYMTABS_READ
;
2511 require_partial_symbols (objfile
, 0);
2514 if (!objfile_has_symbols (objfile
))
2517 printf_unfiltered (_("(no debugging symbols found)\n"));
2521 /* We're done reading the symbol file; finish off complaints. */
2522 clear_complaints (&symfile_complaints
, 0, 1);
2524 /* Getting new symbols may change our opinion about what is
2527 reinit_frame_cache ();
2529 /* Discard cleanups as symbol reading was successful. */
2530 discard_cleanups (old_cleanups
);
2532 /* If the mtime has changed between the time we set new_modtime
2533 and now, we *want* this to be out of date, so don't call stat
2535 objfile
->mtime
= new_modtime
;
2537 init_entry_point_info (objfile
);
2543 /* Notify objfiles that we've modified objfile sections. */
2544 objfiles_changed ();
2546 clear_symtab_users (0);
2547 /* At least one objfile has changed, so we can consider that
2548 the executable we're debugging has changed too. */
2549 observer_notify_executable_changed ();
2562 static filename_language
*filename_language_table
;
2563 static int fl_table_size
, fl_table_next
;
2566 add_filename_language (char *ext
, enum language lang
)
2568 if (fl_table_next
>= fl_table_size
)
2570 fl_table_size
+= 10;
2571 filename_language_table
=
2572 xrealloc (filename_language_table
,
2573 fl_table_size
* sizeof (*filename_language_table
));
2576 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2577 filename_language_table
[fl_table_next
].lang
= lang
;
2581 static char *ext_args
;
2583 show_ext_args (struct ui_file
*file
, int from_tty
,
2584 struct cmd_list_element
*c
, const char *value
)
2586 fprintf_filtered (file
,
2587 _("Mapping between filename extension "
2588 "and source language is \"%s\".\n"),
2593 set_ext_lang_command (char *args
, int from_tty
, struct cmd_list_element
*e
)
2596 char *cp
= ext_args
;
2599 /* First arg is filename extension, starting with '.' */
2601 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2603 /* Find end of first arg. */
2604 while (*cp
&& !isspace (*cp
))
2608 error (_("'%s': two arguments required -- "
2609 "filename extension and language"),
2612 /* Null-terminate first arg. */
2615 /* Find beginning of second arg, which should be a source language. */
2616 while (*cp
&& isspace (*cp
))
2620 error (_("'%s': two arguments required -- "
2621 "filename extension and language"),
2624 /* Lookup the language from among those we know. */
2625 lang
= language_enum (cp
);
2627 /* Now lookup the filename extension: do we already know it? */
2628 for (i
= 0; i
< fl_table_next
; i
++)
2629 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2632 if (i
>= fl_table_next
)
2634 /* New file extension. */
2635 add_filename_language (ext_args
, lang
);
2639 /* Redefining a previously known filename extension. */
2642 /* query ("Really make files of type %s '%s'?", */
2643 /* ext_args, language_str (lang)); */
2645 xfree (filename_language_table
[i
].ext
);
2646 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2647 filename_language_table
[i
].lang
= lang
;
2652 info_ext_lang_command (char *args
, int from_tty
)
2656 printf_filtered (_("Filename extensions and the languages they represent:"));
2657 printf_filtered ("\n\n");
2658 for (i
= 0; i
< fl_table_next
; i
++)
2659 printf_filtered ("\t%s\t- %s\n",
2660 filename_language_table
[i
].ext
,
2661 language_str (filename_language_table
[i
].lang
));
2665 init_filename_language_table (void)
2667 if (fl_table_size
== 0) /* Protect against repetition. */
2671 filename_language_table
=
2672 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
2673 add_filename_language (".c", language_c
);
2674 add_filename_language (".d", language_d
);
2675 add_filename_language (".C", language_cplus
);
2676 add_filename_language (".cc", language_cplus
);
2677 add_filename_language (".cp", language_cplus
);
2678 add_filename_language (".cpp", language_cplus
);
2679 add_filename_language (".cxx", language_cplus
);
2680 add_filename_language (".c++", language_cplus
);
2681 add_filename_language (".java", language_java
);
2682 add_filename_language (".class", language_java
);
2683 add_filename_language (".m", language_objc
);
2684 add_filename_language (".f", language_fortran
);
2685 add_filename_language (".F", language_fortran
);
2686 add_filename_language (".for", language_fortran
);
2687 add_filename_language (".FOR", language_fortran
);
2688 add_filename_language (".ftn", language_fortran
);
2689 add_filename_language (".FTN", language_fortran
);
2690 add_filename_language (".fpp", language_fortran
);
2691 add_filename_language (".FPP", language_fortran
);
2692 add_filename_language (".f90", language_fortran
);
2693 add_filename_language (".F90", language_fortran
);
2694 add_filename_language (".f95", language_fortran
);
2695 add_filename_language (".F95", language_fortran
);
2696 add_filename_language (".f03", language_fortran
);
2697 add_filename_language (".F03", language_fortran
);
2698 add_filename_language (".f08", language_fortran
);
2699 add_filename_language (".F08", language_fortran
);
2700 add_filename_language (".s", language_asm
);
2701 add_filename_language (".sx", language_asm
);
2702 add_filename_language (".S", language_asm
);
2703 add_filename_language (".pas", language_pascal
);
2704 add_filename_language (".p", language_pascal
);
2705 add_filename_language (".pp", language_pascal
);
2706 add_filename_language (".adb", language_ada
);
2707 add_filename_language (".ads", language_ada
);
2708 add_filename_language (".a", language_ada
);
2709 add_filename_language (".ada", language_ada
);
2710 add_filename_language (".dg", language_ada
);
2715 deduce_language_from_filename (const char *filename
)
2720 if (filename
!= NULL
)
2721 if ((cp
= strrchr (filename
, '.')) != NULL
)
2722 for (i
= 0; i
< fl_table_next
; i
++)
2723 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2724 return filename_language_table
[i
].lang
;
2726 return language_unknown
;
2731 Allocate and partly initialize a new symbol table. Return a pointer
2732 to it. error() if no space.
2734 Caller must set these fields:
2743 allocate_symtab (const char *filename
, struct objfile
*objfile
)
2745 struct symtab
*symtab
;
2747 symtab
= (struct symtab
*)
2748 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symtab
));
2749 memset (symtab
, 0, sizeof (*symtab
));
2750 symtab
->filename
= (char *) bcache (filename
, strlen (filename
) + 1,
2751 objfile
->filename_cache
);
2752 symtab
->fullname
= NULL
;
2753 symtab
->language
= deduce_language_from_filename (filename
);
2754 symtab
->debugformat
= "unknown";
2756 /* Hook it to the objfile it comes from. */
2758 symtab
->objfile
= objfile
;
2759 symtab
->next
= objfile
->symtabs
;
2760 objfile
->symtabs
= symtab
;
2766 /* Reset all data structures in gdb which may contain references to symbol
2767 table data. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
2770 clear_symtab_users (int add_flags
)
2772 /* Someday, we should do better than this, by only blowing away
2773 the things that really need to be blown. */
2775 /* Clear the "current" symtab first, because it is no longer valid.
2776 breakpoint_re_set may try to access the current symtab. */
2777 clear_current_source_symtab_and_line ();
2780 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
2781 breakpoint_re_set ();
2782 set_default_breakpoint (0, NULL
, 0, 0, 0);
2783 clear_pc_function_cache ();
2784 observer_notify_new_objfile (NULL
);
2786 /* Clear globals which might have pointed into a removed objfile.
2787 FIXME: It's not clear which of these are supposed to persist
2788 between expressions and which ought to be reset each time. */
2789 expression_context_block
= NULL
;
2790 innermost_block
= NULL
;
2792 /* Varobj may refer to old symbols, perform a cleanup. */
2793 varobj_invalidate ();
2798 clear_symtab_users_cleanup (void *ignore
)
2800 clear_symtab_users (0);
2804 The following code implements an abstraction for debugging overlay sections.
2806 The target model is as follows:
2807 1) The gnu linker will permit multiple sections to be mapped into the
2808 same VMA, each with its own unique LMA (or load address).
2809 2) It is assumed that some runtime mechanism exists for mapping the
2810 sections, one by one, from the load address into the VMA address.
2811 3) This code provides a mechanism for gdb to keep track of which
2812 sections should be considered to be mapped from the VMA to the LMA.
2813 This information is used for symbol lookup, and memory read/write.
2814 For instance, if a section has been mapped then its contents
2815 should be read from the VMA, otherwise from the LMA.
2817 Two levels of debugger support for overlays are available. One is
2818 "manual", in which the debugger relies on the user to tell it which
2819 overlays are currently mapped. This level of support is
2820 implemented entirely in the core debugger, and the information about
2821 whether a section is mapped is kept in the objfile->obj_section table.
2823 The second level of support is "automatic", and is only available if
2824 the target-specific code provides functionality to read the target's
2825 overlay mapping table, and translate its contents for the debugger
2826 (by updating the mapped state information in the obj_section tables).
2828 The interface is as follows:
2830 overlay map <name> -- tell gdb to consider this section mapped
2831 overlay unmap <name> -- tell gdb to consider this section unmapped
2832 overlay list -- list the sections that GDB thinks are mapped
2833 overlay read-target -- get the target's state of what's mapped
2834 overlay off/manual/auto -- set overlay debugging state
2835 Functional interface:
2836 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2837 section, return that section.
2838 find_pc_overlay(pc): find any overlay section that contains
2839 the pc, either in its VMA or its LMA
2840 section_is_mapped(sect): true if overlay is marked as mapped
2841 section_is_overlay(sect): true if section's VMA != LMA
2842 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2843 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2844 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2845 overlay_mapped_address(...): map an address from section's LMA to VMA
2846 overlay_unmapped_address(...): map an address from section's VMA to LMA
2847 symbol_overlayed_address(...): Return a "current" address for symbol:
2848 either in VMA or LMA depending on whether
2849 the symbol's section is currently mapped. */
2851 /* Overlay debugging state: */
2853 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2854 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state. */
2856 /* Function: section_is_overlay (SECTION)
2857 Returns true if SECTION has VMA not equal to LMA, ie.
2858 SECTION is loaded at an address different from where it will "run". */
2861 section_is_overlay (struct obj_section
*section
)
2863 if (overlay_debugging
&& section
)
2865 bfd
*abfd
= section
->objfile
->obfd
;
2866 asection
*bfd_section
= section
->the_bfd_section
;
2868 if (bfd_section_lma (abfd
, bfd_section
) != 0
2869 && bfd_section_lma (abfd
, bfd_section
)
2870 != bfd_section_vma (abfd
, bfd_section
))
2877 /* Function: overlay_invalidate_all (void)
2878 Invalidate the mapped state of all overlay sections (mark it as stale). */
2881 overlay_invalidate_all (void)
2883 struct objfile
*objfile
;
2884 struct obj_section
*sect
;
2886 ALL_OBJSECTIONS (objfile
, sect
)
2887 if (section_is_overlay (sect
))
2888 sect
->ovly_mapped
= -1;
2891 /* Function: section_is_mapped (SECTION)
2892 Returns true if section is an overlay, and is currently mapped.
2894 Access to the ovly_mapped flag is restricted to this function, so
2895 that we can do automatic update. If the global flag
2896 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2897 overlay_invalidate_all. If the mapped state of the particular
2898 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2901 section_is_mapped (struct obj_section
*osect
)
2903 struct gdbarch
*gdbarch
;
2905 if (osect
== 0 || !section_is_overlay (osect
))
2908 switch (overlay_debugging
)
2912 return 0; /* overlay debugging off */
2913 case ovly_auto
: /* overlay debugging automatic */
2914 /* Unles there is a gdbarch_overlay_update function,
2915 there's really nothing useful to do here (can't really go auto). */
2916 gdbarch
= get_objfile_arch (osect
->objfile
);
2917 if (gdbarch_overlay_update_p (gdbarch
))
2919 if (overlay_cache_invalid
)
2921 overlay_invalidate_all ();
2922 overlay_cache_invalid
= 0;
2924 if (osect
->ovly_mapped
== -1)
2925 gdbarch_overlay_update (gdbarch
, osect
);
2927 /* fall thru to manual case */
2928 case ovly_on
: /* overlay debugging manual */
2929 return osect
->ovly_mapped
== 1;
2933 /* Function: pc_in_unmapped_range
2934 If PC falls into the lma range of SECTION, return true, else false. */
2937 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
2939 if (section_is_overlay (section
))
2941 bfd
*abfd
= section
->objfile
->obfd
;
2942 asection
*bfd_section
= section
->the_bfd_section
;
2944 /* We assume the LMA is relocated by the same offset as the VMA. */
2945 bfd_vma size
= bfd_get_section_size (bfd_section
);
2946 CORE_ADDR offset
= obj_section_offset (section
);
2948 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
2949 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
2956 /* Function: pc_in_mapped_range
2957 If PC falls into the vma range of SECTION, return true, else false. */
2960 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
2962 if (section_is_overlay (section
))
2964 if (obj_section_addr (section
) <= pc
2965 && pc
< obj_section_endaddr (section
))
2973 /* Return true if the mapped ranges of sections A and B overlap, false
2976 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
2978 CORE_ADDR a_start
= obj_section_addr (a
);
2979 CORE_ADDR a_end
= obj_section_endaddr (a
);
2980 CORE_ADDR b_start
= obj_section_addr (b
);
2981 CORE_ADDR b_end
= obj_section_endaddr (b
);
2983 return (a_start
< b_end
&& b_start
< a_end
);
2986 /* Function: overlay_unmapped_address (PC, SECTION)
2987 Returns the address corresponding to PC in the unmapped (load) range.
2988 May be the same as PC. */
2991 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
2993 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
2995 bfd
*abfd
= section
->objfile
->obfd
;
2996 asection
*bfd_section
= section
->the_bfd_section
;
2998 return pc
+ bfd_section_lma (abfd
, bfd_section
)
2999 - bfd_section_vma (abfd
, bfd_section
);
3005 /* Function: overlay_mapped_address (PC, SECTION)
3006 Returns the address corresponding to PC in the mapped (runtime) range.
3007 May be the same as PC. */
3010 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3012 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3014 bfd
*abfd
= section
->objfile
->obfd
;
3015 asection
*bfd_section
= section
->the_bfd_section
;
3017 return pc
+ bfd_section_vma (abfd
, bfd_section
)
3018 - bfd_section_lma (abfd
, bfd_section
);
3025 /* Function: symbol_overlayed_address
3026 Return one of two addresses (relative to the VMA or to the LMA),
3027 depending on whether the section is mapped or not. */
3030 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3032 if (overlay_debugging
)
3034 /* If the symbol has no section, just return its regular address. */
3037 /* If the symbol's section is not an overlay, just return its
3039 if (!section_is_overlay (section
))
3041 /* If the symbol's section is mapped, just return its address. */
3042 if (section_is_mapped (section
))
3045 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3046 * then return its LOADED address rather than its vma address!!
3048 return overlay_unmapped_address (address
, section
);
3053 /* Function: find_pc_overlay (PC)
3054 Return the best-match overlay section for PC:
3055 If PC matches a mapped overlay section's VMA, return that section.
3056 Else if PC matches an unmapped section's VMA, return that section.
3057 Else if PC matches an unmapped section's LMA, return that section. */
3059 struct obj_section
*
3060 find_pc_overlay (CORE_ADDR pc
)
3062 struct objfile
*objfile
;
3063 struct obj_section
*osect
, *best_match
= NULL
;
3065 if (overlay_debugging
)
3066 ALL_OBJSECTIONS (objfile
, osect
)
3067 if (section_is_overlay (osect
))
3069 if (pc_in_mapped_range (pc
, osect
))
3071 if (section_is_mapped (osect
))
3076 else if (pc_in_unmapped_range (pc
, osect
))
3082 /* Function: find_pc_mapped_section (PC)
3083 If PC falls into the VMA address range of an overlay section that is
3084 currently marked as MAPPED, return that section. Else return NULL. */
3086 struct obj_section
*
3087 find_pc_mapped_section (CORE_ADDR pc
)
3089 struct objfile
*objfile
;
3090 struct obj_section
*osect
;
3092 if (overlay_debugging
)
3093 ALL_OBJSECTIONS (objfile
, osect
)
3094 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3100 /* Function: list_overlays_command
3101 Print a list of mapped sections and their PC ranges. */
3104 list_overlays_command (char *args
, int from_tty
)
3107 struct objfile
*objfile
;
3108 struct obj_section
*osect
;
3110 if (overlay_debugging
)
3111 ALL_OBJSECTIONS (objfile
, osect
)
3112 if (section_is_mapped (osect
))
3114 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3119 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3120 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3121 size
= bfd_get_section_size (osect
->the_bfd_section
);
3122 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3124 printf_filtered ("Section %s, loaded at ", name
);
3125 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3126 puts_filtered (" - ");
3127 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3128 printf_filtered (", mapped at ");
3129 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3130 puts_filtered (" - ");
3131 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3132 puts_filtered ("\n");
3137 printf_filtered (_("No sections are mapped.\n"));
3140 /* Function: map_overlay_command
3141 Mark the named section as mapped (ie. residing at its VMA address). */
3144 map_overlay_command (char *args
, int from_tty
)
3146 struct objfile
*objfile
, *objfile2
;
3147 struct obj_section
*sec
, *sec2
;
3149 if (!overlay_debugging
)
3150 error (_("Overlay debugging not enabled. Use "
3151 "either the 'overlay auto' or\n"
3152 "the 'overlay manual' command."));
3154 if (args
== 0 || *args
== 0)
3155 error (_("Argument required: name of an overlay section"));
3157 /* First, find a section matching the user supplied argument. */
3158 ALL_OBJSECTIONS (objfile
, sec
)
3159 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3161 /* Now, check to see if the section is an overlay. */
3162 if (!section_is_overlay (sec
))
3163 continue; /* not an overlay section */
3165 /* Mark the overlay as "mapped". */
3166 sec
->ovly_mapped
= 1;
3168 /* Next, make a pass and unmap any sections that are
3169 overlapped by this new section: */
3170 ALL_OBJSECTIONS (objfile2
, sec2
)
3171 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
, sec2
))
3174 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3175 bfd_section_name (objfile
->obfd
,
3176 sec2
->the_bfd_section
));
3177 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2. */
3181 error (_("No overlay section called %s"), args
);
3184 /* Function: unmap_overlay_command
3185 Mark the overlay section as unmapped
3186 (ie. resident in its LMA address range, rather than the VMA range). */
3189 unmap_overlay_command (char *args
, int from_tty
)
3191 struct objfile
*objfile
;
3192 struct obj_section
*sec
;
3194 if (!overlay_debugging
)
3195 error (_("Overlay debugging not enabled. "
3196 "Use either the 'overlay auto' or\n"
3197 "the 'overlay manual' command."));
3199 if (args
== 0 || *args
== 0)
3200 error (_("Argument required: name of an overlay section"));
3202 /* First, find a section matching the user supplied argument. */
3203 ALL_OBJSECTIONS (objfile
, sec
)
3204 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3206 if (!sec
->ovly_mapped
)
3207 error (_("Section %s is not mapped"), args
);
3208 sec
->ovly_mapped
= 0;
3211 error (_("No overlay section called %s"), args
);
3214 /* Function: overlay_auto_command
3215 A utility command to turn on overlay debugging.
3216 Possibly this should be done via a set/show command. */
3219 overlay_auto_command (char *args
, int from_tty
)
3221 overlay_debugging
= ovly_auto
;
3222 enable_overlay_breakpoints ();
3224 printf_unfiltered (_("Automatic overlay debugging enabled."));
3227 /* Function: overlay_manual_command
3228 A utility command to turn on overlay debugging.
3229 Possibly this should be done via a set/show command. */
3232 overlay_manual_command (char *args
, int from_tty
)
3234 overlay_debugging
= ovly_on
;
3235 disable_overlay_breakpoints ();
3237 printf_unfiltered (_("Overlay debugging enabled."));
3240 /* Function: overlay_off_command
3241 A utility command to turn on overlay debugging.
3242 Possibly this should be done via a set/show command. */
3245 overlay_off_command (char *args
, int from_tty
)
3247 overlay_debugging
= ovly_off
;
3248 disable_overlay_breakpoints ();
3250 printf_unfiltered (_("Overlay debugging disabled."));
3254 overlay_load_command (char *args
, int from_tty
)
3256 struct gdbarch
*gdbarch
= get_current_arch ();
3258 if (gdbarch_overlay_update_p (gdbarch
))
3259 gdbarch_overlay_update (gdbarch
, NULL
);
3261 error (_("This target does not know how to read its overlay state."));
3264 /* Function: overlay_command
3265 A place-holder for a mis-typed command. */
3267 /* Command list chain containing all defined "overlay" subcommands. */
3268 struct cmd_list_element
*overlaylist
;
3271 overlay_command (char *args
, int from_tty
)
3274 ("\"overlay\" must be followed by the name of an overlay command.\n");
3275 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3279 /* Target Overlays for the "Simplest" overlay manager:
3281 This is GDB's default target overlay layer. It works with the
3282 minimal overlay manager supplied as an example by Cygnus. The
3283 entry point is via a function pointer "gdbarch_overlay_update",
3284 so targets that use a different runtime overlay manager can
3285 substitute their own overlay_update function and take over the
3288 The overlay_update function pokes around in the target's data structures
3289 to see what overlays are mapped, and updates GDB's overlay mapping with
3292 In this simple implementation, the target data structures are as follows:
3293 unsigned _novlys; /# number of overlay sections #/
3294 unsigned _ovly_table[_novlys][4] = {
3295 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3296 {..., ..., ..., ...},
3298 unsigned _novly_regions; /# number of overlay regions #/
3299 unsigned _ovly_region_table[_novly_regions][3] = {
3300 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3303 These functions will attempt to update GDB's mappedness state in the
3304 symbol section table, based on the target's mappedness state.
3306 To do this, we keep a cached copy of the target's _ovly_table, and
3307 attempt to detect when the cached copy is invalidated. The main
3308 entry point is "simple_overlay_update(SECT), which looks up SECT in
3309 the cached table and re-reads only the entry for that section from
3310 the target (whenever possible). */
3312 /* Cached, dynamically allocated copies of the target data structures: */
3313 static unsigned (*cache_ovly_table
)[4] = 0;
3314 static unsigned cache_novlys
= 0;
3315 static CORE_ADDR cache_ovly_table_base
= 0;
3318 VMA
, SIZE
, LMA
, MAPPED
3321 /* Throw away the cached copy of _ovly_table. */
3323 simple_free_overlay_table (void)
3325 if (cache_ovly_table
)
3326 xfree (cache_ovly_table
);
3328 cache_ovly_table
= NULL
;
3329 cache_ovly_table_base
= 0;
3332 /* Read an array of ints of size SIZE from the target into a local buffer.
3333 Convert to host order. int LEN is number of ints. */
3335 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3336 int len
, int size
, enum bfd_endian byte_order
)
3338 /* FIXME (alloca): Not safe if array is very large. */
3339 gdb_byte
*buf
= alloca (len
* size
);
3342 read_memory (memaddr
, buf
, len
* size
);
3343 for (i
= 0; i
< len
; i
++)
3344 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3347 /* Find and grab a copy of the target _ovly_table
3348 (and _novlys, which is needed for the table's size). */
3350 simple_read_overlay_table (void)
3352 struct minimal_symbol
*novlys_msym
, *ovly_table_msym
;
3353 struct gdbarch
*gdbarch
;
3355 enum bfd_endian byte_order
;
3357 simple_free_overlay_table ();
3358 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3361 error (_("Error reading inferior's overlay table: "
3362 "couldn't find `_novlys' variable\n"
3363 "in inferior. Use `overlay manual' mode."));
3367 ovly_table_msym
= lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3368 if (! ovly_table_msym
)
3370 error (_("Error reading inferior's overlay table: couldn't find "
3371 "`_ovly_table' array\n"
3372 "in inferior. Use `overlay manual' mode."));
3376 gdbarch
= get_objfile_arch (msymbol_objfile (ovly_table_msym
));
3377 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3378 byte_order
= gdbarch_byte_order (gdbarch
);
3380 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
),
3383 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3384 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3385 read_target_long_array (cache_ovly_table_base
,
3386 (unsigned int *) cache_ovly_table
,
3387 cache_novlys
* 4, word_size
, byte_order
);
3389 return 1; /* SUCCESS */
3392 /* Function: simple_overlay_update_1
3393 A helper function for simple_overlay_update. Assuming a cached copy
3394 of _ovly_table exists, look through it to find an entry whose vma,
3395 lma and size match those of OSECT. Re-read the entry and make sure
3396 it still matches OSECT (else the table may no longer be valid).
3397 Set OSECT's mapped state to match the entry. Return: 1 for
3398 success, 0 for failure. */
3401 simple_overlay_update_1 (struct obj_section
*osect
)
3404 bfd
*obfd
= osect
->objfile
->obfd
;
3405 asection
*bsect
= osect
->the_bfd_section
;
3406 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3407 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3408 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3410 size
= bfd_get_section_size (osect
->the_bfd_section
);
3411 for (i
= 0; i
< cache_novlys
; i
++)
3412 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3413 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3414 /* && cache_ovly_table[i][SIZE] == size */ )
3416 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3417 (unsigned int *) cache_ovly_table
[i
],
3418 4, word_size
, byte_order
);
3419 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3420 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3421 /* && cache_ovly_table[i][SIZE] == size */ )
3423 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3426 else /* Warning! Warning! Target's ovly table has changed! */
3432 /* Function: simple_overlay_update
3433 If OSECT is NULL, then update all sections' mapped state
3434 (after re-reading the entire target _ovly_table).
3435 If OSECT is non-NULL, then try to find a matching entry in the
3436 cached ovly_table and update only OSECT's mapped state.
3437 If a cached entry can't be found or the cache isn't valid, then
3438 re-read the entire cache, and go ahead and update all sections. */
3441 simple_overlay_update (struct obj_section
*osect
)
3443 struct objfile
*objfile
;
3445 /* Were we given an osect to look up? NULL means do all of them. */
3447 /* Have we got a cached copy of the target's overlay table? */
3448 if (cache_ovly_table
!= NULL
)
3450 /* Does its cached location match what's currently in the
3452 struct minimal_symbol
*minsym
3453 = lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3456 error (_("Error reading inferior's overlay table: couldn't "
3457 "find `_ovly_table' array\n"
3458 "in inferior. Use `overlay manual' mode."));
3460 if (cache_ovly_table_base
== SYMBOL_VALUE_ADDRESS (minsym
))
3461 /* Then go ahead and try to look up this single section in
3463 if (simple_overlay_update_1 (osect
))
3464 /* Found it! We're done. */
3468 /* Cached table no good: need to read the entire table anew.
3469 Or else we want all the sections, in which case it's actually
3470 more efficient to read the whole table in one block anyway. */
3472 if (! simple_read_overlay_table ())
3475 /* Now may as well update all sections, even if only one was requested. */
3476 ALL_OBJSECTIONS (objfile
, osect
)
3477 if (section_is_overlay (osect
))
3480 bfd
*obfd
= osect
->objfile
->obfd
;
3481 asection
*bsect
= osect
->the_bfd_section
;
3483 size
= bfd_get_section_size (bsect
);
3484 for (i
= 0; i
< cache_novlys
; i
++)
3485 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3486 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3487 /* && cache_ovly_table[i][SIZE] == size */ )
3488 { /* obj_section matches i'th entry in ovly_table. */
3489 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3490 break; /* finished with inner for loop: break out. */
3495 /* Set the output sections and output offsets for section SECTP in
3496 ABFD. The relocation code in BFD will read these offsets, so we
3497 need to be sure they're initialized. We map each section to itself,
3498 with no offset; this means that SECTP->vma will be honored. */
3501 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3503 sectp
->output_section
= sectp
;
3504 sectp
->output_offset
= 0;
3507 /* Default implementation for sym_relocate. */
3511 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3514 bfd
*abfd
= objfile
->obfd
;
3516 /* We're only interested in sections with relocation
3518 if ((sectp
->flags
& SEC_RELOC
) == 0)
3521 /* We will handle section offsets properly elsewhere, so relocate as if
3522 all sections begin at 0. */
3523 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3525 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3528 /* Relocate the contents of a debug section SECTP in ABFD. The
3529 contents are stored in BUF if it is non-NULL, or returned in a
3530 malloc'd buffer otherwise.
3532 For some platforms and debug info formats, shared libraries contain
3533 relocations against the debug sections (particularly for DWARF-2;
3534 one affected platform is PowerPC GNU/Linux, although it depends on
3535 the version of the linker in use). Also, ELF object files naturally
3536 have unresolved relocations for their debug sections. We need to apply
3537 the relocations in order to get the locations of symbols correct.
3538 Another example that may require relocation processing, is the
3539 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3543 symfile_relocate_debug_section (struct objfile
*objfile
,
3544 asection
*sectp
, bfd_byte
*buf
)
3546 gdb_assert (objfile
->sf
->sym_relocate
);
3548 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3551 struct symfile_segment_data
*
3552 get_symfile_segment_data (bfd
*abfd
)
3554 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3559 return sf
->sym_segments (abfd
);
3563 free_symfile_segment_data (struct symfile_segment_data
*data
)
3565 xfree (data
->segment_bases
);
3566 xfree (data
->segment_sizes
);
3567 xfree (data
->segment_info
);
3573 - DATA, containing segment addresses from the object file ABFD, and
3574 the mapping from ABFD's sections onto the segments that own them,
3576 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3577 segment addresses reported by the target,
3578 store the appropriate offsets for each section in OFFSETS.
3580 If there are fewer entries in SEGMENT_BASES than there are segments
3581 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3583 If there are more entries, then ignore the extra. The target may
3584 not be able to distinguish between an empty data segment and a
3585 missing data segment; a missing text segment is less plausible. */
3587 symfile_map_offsets_to_segments (bfd
*abfd
, struct symfile_segment_data
*data
,
3588 struct section_offsets
*offsets
,
3589 int num_segment_bases
,
3590 const CORE_ADDR
*segment_bases
)
3595 /* It doesn't make sense to call this function unless you have some
3596 segment base addresses. */
3597 gdb_assert (num_segment_bases
> 0);
3599 /* If we do not have segment mappings for the object file, we
3600 can not relocate it by segments. */
3601 gdb_assert (data
!= NULL
);
3602 gdb_assert (data
->num_segments
> 0);
3604 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3606 int which
= data
->segment_info
[i
];
3608 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
3610 /* Don't bother computing offsets for sections that aren't
3611 loaded as part of any segment. */
3615 /* Use the last SEGMENT_BASES entry as the address of any extra
3616 segments mentioned in DATA->segment_info. */
3617 if (which
> num_segment_bases
)
3618 which
= num_segment_bases
;
3620 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
3621 - data
->segment_bases
[which
- 1]);
3628 symfile_find_segment_sections (struct objfile
*objfile
)
3630 bfd
*abfd
= objfile
->obfd
;
3633 struct symfile_segment_data
*data
;
3635 data
= get_symfile_segment_data (objfile
->obfd
);
3639 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
3641 free_symfile_segment_data (data
);
3645 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3647 int which
= data
->segment_info
[i
];
3651 if (objfile
->sect_index_text
== -1)
3652 objfile
->sect_index_text
= sect
->index
;
3654 if (objfile
->sect_index_rodata
== -1)
3655 objfile
->sect_index_rodata
= sect
->index
;
3657 else if (which
== 2)
3659 if (objfile
->sect_index_data
== -1)
3660 objfile
->sect_index_data
= sect
->index
;
3662 if (objfile
->sect_index_bss
== -1)
3663 objfile
->sect_index_bss
= sect
->index
;
3667 free_symfile_segment_data (data
);
3671 _initialize_symfile (void)
3673 struct cmd_list_element
*c
;
3675 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3676 Load symbol table from executable file FILE.\n\
3677 The `file' command can also load symbol tables, as well as setting the file\n\
3678 to execute."), &cmdlist
);
3679 set_cmd_completer (c
, filename_completer
);
3681 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3682 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3683 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR>\
3684 ...]\nADDR is the starting address of the file's text.\n\
3685 The optional arguments are section-name section-address pairs and\n\
3686 should be specified if the data and bss segments are not contiguous\n\
3687 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3689 set_cmd_completer (c
, filename_completer
);
3691 c
= add_cmd ("load", class_files
, load_command
, _("\
3692 Dynamically load FILE into the running program, and record its symbols\n\
3693 for access from GDB.\n\
3694 A load OFFSET may also be given."), &cmdlist
);
3695 set_cmd_completer (c
, filename_completer
);
3697 add_setshow_boolean_cmd ("symbol-reloading", class_support
,
3698 &symbol_reloading
, _("\
3699 Set dynamic symbol table reloading multiple times in one run."), _("\
3700 Show dynamic symbol table reloading multiple times in one run."), NULL
,
3702 show_symbol_reloading
,
3703 &setlist
, &showlist
);
3705 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3706 _("Commands for debugging overlays."), &overlaylist
,
3707 "overlay ", 0, &cmdlist
);
3709 add_com_alias ("ovly", "overlay", class_alias
, 1);
3710 add_com_alias ("ov", "overlay", class_alias
, 1);
3712 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3713 _("Assert that an overlay section is mapped."), &overlaylist
);
3715 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3716 _("Assert that an overlay section is unmapped."), &overlaylist
);
3718 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3719 _("List mappings of overlay sections."), &overlaylist
);
3721 add_cmd ("manual", class_support
, overlay_manual_command
,
3722 _("Enable overlay debugging."), &overlaylist
);
3723 add_cmd ("off", class_support
, overlay_off_command
,
3724 _("Disable overlay debugging."), &overlaylist
);
3725 add_cmd ("auto", class_support
, overlay_auto_command
,
3726 _("Enable automatic overlay debugging."), &overlaylist
);
3727 add_cmd ("load-target", class_support
, overlay_load_command
,
3728 _("Read the overlay mapping state from the target."), &overlaylist
);
3730 /* Filename extension to source language lookup table: */
3731 init_filename_language_table ();
3732 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3734 Set mapping between filename extension and source language."), _("\
3735 Show mapping between filename extension and source language."), _("\
3736 Usage: set extension-language .foo bar"),
3737 set_ext_lang_command
,
3739 &setlist
, &showlist
);
3741 add_info ("extensions", info_ext_lang_command
,
3742 _("All filename extensions associated with a source language."));
3744 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3745 &debug_file_directory
, _("\
3746 Set the directories where separate debug symbols are searched for."), _("\
3747 Show the directories where separate debug symbols are searched for."), _("\
3748 Separate debug symbols are first searched for in the same\n\
3749 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3750 and lastly at the path of the directory of the binary with\n\
3751 each global debug-file-directory component prepended."),
3753 show_debug_file_directory
,
3754 &setlist
, &showlist
);