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 PARENT is the original objfile if ABFD is a separate debug info file.
1071 Otherwise PARENT is NULL.
1073 Upon success, returns a pointer to the objfile that was added.
1074 Upon failure, jumps back to command level (never returns). */
1076 static struct objfile
*
1077 symbol_file_add_with_addrs_or_offsets (bfd
*abfd
,
1079 struct section_addr_info
*addrs
,
1080 struct section_offsets
*offsets
,
1082 int flags
, struct objfile
*parent
)
1084 struct objfile
*objfile
;
1085 struct cleanup
*my_cleanups
;
1086 const char *name
= bfd_get_filename (abfd
);
1087 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1088 const int should_print
= ((from_tty
|| info_verbose
)
1089 && (readnow_symbol_files
1090 || (add_flags
& SYMFILE_NO_READ
) == 0));
1092 if (readnow_symbol_files
)
1094 flags
|= OBJF_READNOW
;
1095 add_flags
&= ~SYMFILE_NO_READ
;
1098 my_cleanups
= make_cleanup_bfd_close (abfd
);
1100 /* Give user a chance to burp if we'd be
1101 interactively wiping out any existing symbols. */
1103 if ((have_full_symbols () || have_partial_symbols ())
1104 && (add_flags
& SYMFILE_MAINLINE
)
1106 && !query (_("Load new symbol table from \"%s\"? "), name
))
1107 error (_("Not confirmed."));
1109 objfile
= allocate_objfile (abfd
, flags
);
1110 discard_cleanups (my_cleanups
);
1113 add_separate_debug_objfile (objfile
, parent
);
1115 /* We either created a new mapped symbol table, mapped an existing
1116 symbol table file which has not had initial symbol reading
1117 performed, or need to read an unmapped symbol table. */
1120 if (deprecated_pre_add_symbol_hook
)
1121 deprecated_pre_add_symbol_hook (name
);
1124 printf_unfiltered (_("Reading symbols from %s..."), name
);
1126 gdb_flush (gdb_stdout
);
1129 syms_from_objfile (objfile
, addrs
, offsets
, num_offsets
,
1132 /* We now have at least a partial symbol table. Check to see if the
1133 user requested that all symbols be read on initial access via either
1134 the gdb startup command line or on a per symbol file basis. Expand
1135 all partial symbol tables for this objfile if so. */
1137 if ((flags
& OBJF_READNOW
))
1141 printf_unfiltered (_("expanding to full symbols..."));
1143 gdb_flush (gdb_stdout
);
1147 objfile
->sf
->qf
->expand_all_symtabs (objfile
);
1150 if (should_print
&& !objfile_has_symbols (objfile
))
1153 printf_unfiltered (_("(no debugging symbols found)..."));
1159 if (deprecated_post_add_symbol_hook
)
1160 deprecated_post_add_symbol_hook ();
1162 printf_unfiltered (_("done.\n"));
1165 /* We print some messages regardless of whether 'from_tty ||
1166 info_verbose' is true, so make sure they go out at the right
1168 gdb_flush (gdb_stdout
);
1170 do_cleanups (my_cleanups
);
1172 if (objfile
->sf
== NULL
)
1174 observer_notify_new_objfile (objfile
);
1175 return objfile
; /* No symbols. */
1178 new_symfile_objfile (objfile
, add_flags
);
1180 observer_notify_new_objfile (objfile
);
1182 bfd_cache_close_all ();
1186 /* Add BFD as a separate debug file for OBJFILE. */
1189 symbol_file_add_separate (bfd
*bfd
, int symfile_flags
, struct objfile
*objfile
)
1191 struct objfile
*new_objfile
;
1192 struct section_addr_info
*sap
;
1193 struct cleanup
*my_cleanup
;
1195 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1196 because sections of BFD may not match sections of OBJFILE and because
1197 vma may have been modified by tools such as prelink. */
1198 sap
= build_section_addr_info_from_objfile (objfile
);
1199 my_cleanup
= make_cleanup_free_section_addr_info (sap
);
1201 new_objfile
= symbol_file_add_with_addrs_or_offsets
1202 (bfd
, symfile_flags
,
1204 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1208 do_cleanups (my_cleanup
);
1211 /* Process the symbol file ABFD, as either the main file or as a
1212 dynamically loaded file.
1214 See symbol_file_add_with_addrs_or_offsets's comments for
1217 symbol_file_add_from_bfd (bfd
*abfd
, int add_flags
,
1218 struct section_addr_info
*addrs
,
1219 int flags
, struct objfile
*parent
)
1221 return symbol_file_add_with_addrs_or_offsets (abfd
, add_flags
, addrs
, 0, 0,
1226 /* Process a symbol file, as either the main file or as a dynamically
1227 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
1230 symbol_file_add (char *name
, int add_flags
, struct section_addr_info
*addrs
,
1233 return symbol_file_add_from_bfd (symfile_bfd_open (name
), add_flags
, addrs
,
1238 /* Call symbol_file_add() with default values and update whatever is
1239 affected by the loading of a new main().
1240 Used when the file is supplied in the gdb command line
1241 and by some targets with special loading requirements.
1242 The auxiliary function, symbol_file_add_main_1(), has the flags
1243 argument for the switches that can only be specified in the symbol_file
1247 symbol_file_add_main (char *args
, int from_tty
)
1249 symbol_file_add_main_1 (args
, from_tty
, 0);
1253 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
1255 const int add_flags
= SYMFILE_MAINLINE
| (from_tty
? SYMFILE_VERBOSE
: 0);
1256 symbol_file_add (args
, add_flags
, NULL
, flags
);
1258 /* Getting new symbols may change our opinion about
1259 what is frameless. */
1260 reinit_frame_cache ();
1262 set_initial_language ();
1266 symbol_file_clear (int from_tty
)
1268 if ((have_full_symbols () || have_partial_symbols ())
1271 ? !query (_("Discard symbol table from `%s'? "),
1272 symfile_objfile
->name
)
1273 : !query (_("Discard symbol table? "))))
1274 error (_("Not confirmed."));
1276 /* solib descriptors may have handles to objfiles. Wipe them before their
1277 objfiles get stale by free_all_objfiles. */
1278 no_shared_libraries (NULL
, from_tty
);
1280 free_all_objfiles ();
1282 gdb_assert (symfile_objfile
== NULL
);
1284 printf_unfiltered (_("No symbol file now.\n"));
1288 get_debug_link_info (struct objfile
*objfile
, unsigned long *crc32_out
)
1291 bfd_size_type debuglink_size
;
1292 unsigned long crc32
;
1296 sect
= bfd_get_section_by_name (objfile
->obfd
, ".gnu_debuglink");
1301 debuglink_size
= bfd_section_size (objfile
->obfd
, sect
);
1303 contents
= xmalloc (debuglink_size
);
1304 bfd_get_section_contents (objfile
->obfd
, sect
, contents
,
1305 (file_ptr
)0, (bfd_size_type
)debuglink_size
);
1307 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1308 crc_offset
= strlen (contents
) + 1;
1309 crc_offset
= (crc_offset
+ 3) & ~3;
1311 crc32
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) (contents
+ crc_offset
));
1318 separate_debug_file_exists (const char *name
, unsigned long crc
,
1319 struct objfile
*parent_objfile
)
1321 unsigned long file_crc
= 0;
1323 gdb_byte buffer
[8*1024];
1325 struct stat parent_stat
, abfd_stat
;
1327 /* Find a separate debug info file as if symbols would be present in
1328 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1329 section can contain just the basename of PARENT_OBJFILE without any
1330 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1331 the separate debug infos with the same basename can exist. */
1333 if (filename_cmp (name
, parent_objfile
->name
) == 0)
1336 abfd
= bfd_open_maybe_remote (name
);
1341 /* Verify symlinks were not the cause of filename_cmp name difference above.
1343 Some operating systems, e.g. Windows, do not provide a meaningful
1344 st_ino; they always set it to zero. (Windows does provide a
1345 meaningful st_dev.) Do not indicate a duplicate library in that
1346 case. While there is no guarantee that a system that provides
1347 meaningful inode numbers will never set st_ino to zero, this is
1348 merely an optimization, so we do not need to worry about false
1351 if (bfd_stat (abfd
, &abfd_stat
) == 0
1352 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0
1353 && abfd_stat
.st_dev
== parent_stat
.st_dev
1354 && abfd_stat
.st_ino
== parent_stat
.st_ino
1355 && abfd_stat
.st_ino
!= 0)
1361 while ((count
= bfd_bread (buffer
, sizeof (buffer
), abfd
)) > 0)
1362 file_crc
= gnu_debuglink_crc32 (file_crc
, buffer
, count
);
1366 if (crc
!= file_crc
)
1368 warning (_("the debug information found in \"%s\""
1369 " does not match \"%s\" (CRC mismatch).\n"),
1370 name
, parent_objfile
->name
);
1377 char *debug_file_directory
= NULL
;
1379 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1380 struct cmd_list_element
*c
, const char *value
)
1382 fprintf_filtered (file
,
1383 _("The directory where separate debug "
1384 "symbols are searched for is \"%s\".\n"),
1388 #if ! defined (DEBUG_SUBDIRECTORY)
1389 #define DEBUG_SUBDIRECTORY ".debug"
1393 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1395 char *basename
, *debugdir
;
1397 char *debugfile
= NULL
;
1398 char *canon_name
= NULL
;
1399 unsigned long crc32
;
1402 basename
= get_debug_link_info (objfile
, &crc32
);
1404 if (basename
== NULL
)
1405 /* There's no separate debug info, hence there's no way we could
1406 load it => no warning. */
1407 goto cleanup_return_debugfile
;
1409 dir
= xstrdup (objfile
->name
);
1411 /* Strip off the final filename part, leaving the directory name,
1412 followed by a slash. The directory can be relative or absolute. */
1413 for (i
= strlen(dir
) - 1; i
>= 0; i
--)
1415 if (IS_DIR_SEPARATOR (dir
[i
]))
1418 /* If I is -1 then no directory is present there and DIR will be "". */
1421 /* Set I to max (strlen (canon_name), strlen (dir)). */
1422 canon_name
= lrealpath (dir
);
1424 if (canon_name
&& strlen (canon_name
) > i
)
1425 i
= strlen (canon_name
);
1427 debugfile
= xmalloc (strlen (debug_file_directory
) + 1
1429 + strlen (DEBUG_SUBDIRECTORY
)
1434 /* First try in the same directory as the original file. */
1435 strcpy (debugfile
, dir
);
1436 strcat (debugfile
, basename
);
1438 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1439 goto cleanup_return_debugfile
;
1441 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1442 strcpy (debugfile
, dir
);
1443 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1444 strcat (debugfile
, "/");
1445 strcat (debugfile
, basename
);
1447 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1448 goto cleanup_return_debugfile
;
1450 /* Then try in the global debugfile directories.
1452 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1453 cause "/..." lookups. */
1455 debugdir
= debug_file_directory
;
1460 while (*debugdir
== DIRNAME_SEPARATOR
)
1463 debugdir_end
= strchr (debugdir
, DIRNAME_SEPARATOR
);
1464 if (debugdir_end
== NULL
)
1465 debugdir_end
= &debugdir
[strlen (debugdir
)];
1467 memcpy (debugfile
, debugdir
, debugdir_end
- debugdir
);
1468 debugfile
[debugdir_end
- debugdir
] = 0;
1469 strcat (debugfile
, "/");
1470 strcat (debugfile
, dir
);
1471 strcat (debugfile
, basename
);
1473 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1474 goto cleanup_return_debugfile
;
1476 /* If the file is in the sysroot, try using its base path in the
1477 global debugfile directory. */
1479 && filename_ncmp (canon_name
, gdb_sysroot
,
1480 strlen (gdb_sysroot
)) == 0
1481 && IS_DIR_SEPARATOR (canon_name
[strlen (gdb_sysroot
)]))
1483 memcpy (debugfile
, debugdir
, debugdir_end
- debugdir
);
1484 debugfile
[debugdir_end
- debugdir
] = 0;
1485 strcat (debugfile
, canon_name
+ strlen (gdb_sysroot
));
1486 strcat (debugfile
, "/");
1487 strcat (debugfile
, basename
);
1489 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1490 goto cleanup_return_debugfile
;
1493 debugdir
= debugdir_end
;
1495 while (*debugdir
!= 0);
1500 cleanup_return_debugfile
:
1508 /* This is the symbol-file command. Read the file, analyze its
1509 symbols, and add a struct symtab to a symtab list. The syntax of
1510 the command is rather bizarre:
1512 1. The function buildargv implements various quoting conventions
1513 which are undocumented and have little or nothing in common with
1514 the way things are quoted (or not quoted) elsewhere in GDB.
1516 2. Options are used, which are not generally used in GDB (perhaps
1517 "set mapped on", "set readnow on" would be better)
1519 3. The order of options matters, which is contrary to GNU
1520 conventions (because it is confusing and inconvenient). */
1523 symbol_file_command (char *args
, int from_tty
)
1529 symbol_file_clear (from_tty
);
1533 char **argv
= gdb_buildargv (args
);
1534 int flags
= OBJF_USERLOADED
;
1535 struct cleanup
*cleanups
;
1538 cleanups
= make_cleanup_freeargv (argv
);
1539 while (*argv
!= NULL
)
1541 if (strcmp (*argv
, "-readnow") == 0)
1542 flags
|= OBJF_READNOW
;
1543 else if (**argv
== '-')
1544 error (_("unknown option `%s'"), *argv
);
1547 symbol_file_add_main_1 (*argv
, from_tty
, flags
);
1555 error (_("no symbol file name was specified"));
1557 do_cleanups (cleanups
);
1561 /* Set the initial language.
1563 FIXME: A better solution would be to record the language in the
1564 psymtab when reading partial symbols, and then use it (if known) to
1565 set the language. This would be a win for formats that encode the
1566 language in an easily discoverable place, such as DWARF. For
1567 stabs, we can jump through hoops looking for specially named
1568 symbols or try to intuit the language from the specific type of
1569 stabs we find, but we can't do that until later when we read in
1573 set_initial_language (void)
1575 enum language lang
= language_unknown
;
1577 if (language_of_main
!= language_unknown
)
1578 lang
= language_of_main
;
1581 const char *filename
;
1583 filename
= find_main_filename ();
1584 if (filename
!= NULL
)
1585 lang
= deduce_language_from_filename (filename
);
1588 if (lang
== language_unknown
)
1590 /* Make C the default language */
1594 set_language (lang
);
1595 expected_language
= current_language
; /* Don't warn the user. */
1598 /* If NAME is a remote name open the file using remote protocol, otherwise
1599 open it normally. */
1602 bfd_open_maybe_remote (const char *name
)
1604 if (remote_filename_p (name
))
1605 return remote_bfd_open (name
, gnutarget
);
1607 return bfd_openr (name
, gnutarget
);
1611 /* Open the file specified by NAME and hand it off to BFD for
1612 preliminary analysis. Return a newly initialized bfd *, which
1613 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1614 absolute). In case of trouble, error() is called. */
1617 symfile_bfd_open (char *name
)
1621 char *absolute_name
;
1623 if (remote_filename_p (name
))
1625 name
= xstrdup (name
);
1626 sym_bfd
= remote_bfd_open (name
, gnutarget
);
1629 make_cleanup (xfree
, name
);
1630 error (_("`%s': can't open to read symbols: %s."), name
,
1631 bfd_errmsg (bfd_get_error ()));
1634 if (!bfd_check_format (sym_bfd
, bfd_object
))
1636 bfd_close (sym_bfd
);
1637 make_cleanup (xfree
, name
);
1638 error (_("`%s': can't read symbols: %s."), name
,
1639 bfd_errmsg (bfd_get_error ()));
1645 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy. */
1647 /* Look down path for it, allocate 2nd new malloc'd copy. */
1648 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, name
,
1649 O_RDONLY
| O_BINARY
, &absolute_name
);
1650 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1653 char *exename
= alloca (strlen (name
) + 5);
1655 strcat (strcpy (exename
, name
), ".exe");
1656 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, exename
,
1657 O_RDONLY
| O_BINARY
, &absolute_name
);
1662 make_cleanup (xfree
, name
);
1663 perror_with_name (name
);
1666 /* Free 1st new malloc'd copy, but keep the 2nd malloc'd copy in
1667 bfd. It'll be freed in free_objfile(). */
1669 name
= absolute_name
;
1671 sym_bfd
= bfd_fopen (name
, gnutarget
, FOPEN_RB
, desc
);
1675 make_cleanup (xfree
, name
);
1676 error (_("`%s': can't open to read symbols: %s."), name
,
1677 bfd_errmsg (bfd_get_error ()));
1679 bfd_set_cacheable (sym_bfd
, 1);
1681 if (!bfd_check_format (sym_bfd
, bfd_object
))
1683 /* FIXME: should be checking for errors from bfd_close (for one
1684 thing, on error it does not free all the storage associated
1686 bfd_close (sym_bfd
); /* This also closes desc. */
1687 make_cleanup (xfree
, name
);
1688 error (_("`%s': can't read symbols: %s."), name
,
1689 bfd_errmsg (bfd_get_error ()));
1692 /* bfd_usrdata exists for applications and libbfd must not touch it. */
1693 gdb_assert (bfd_usrdata (sym_bfd
) == NULL
);
1698 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1699 the section was not found. */
1702 get_section_index (struct objfile
*objfile
, char *section_name
)
1704 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1712 /* Link SF into the global symtab_fns list. Called on startup by the
1713 _initialize routine in each object file format reader, to register
1714 information about each format the reader is prepared to handle. */
1717 add_symtab_fns (const struct sym_fns
*sf
)
1719 VEC_safe_push (sym_fns_ptr
, symtab_fns
, sf
);
1722 /* Initialize OBJFILE to read symbols from its associated BFD. It
1723 either returns or calls error(). The result is an initialized
1724 struct sym_fns in the objfile structure, that contains cached
1725 information about the symbol file. */
1727 static const struct sym_fns
*
1728 find_sym_fns (bfd
*abfd
)
1730 const struct sym_fns
*sf
;
1731 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1734 if (our_flavour
== bfd_target_srec_flavour
1735 || our_flavour
== bfd_target_ihex_flavour
1736 || our_flavour
== bfd_target_tekhex_flavour
)
1737 return NULL
; /* No symbols. */
1739 for (i
= 0; VEC_iterate (sym_fns_ptr
, symtab_fns
, i
, sf
); ++i
)
1740 if (our_flavour
== sf
->sym_flavour
)
1743 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1744 bfd_get_target (abfd
));
1748 /* This function runs the load command of our current target. */
1751 load_command (char *arg
, int from_tty
)
1755 /* The user might be reloading because the binary has changed. Take
1756 this opportunity to check. */
1757 reopen_exec_file ();
1765 parg
= arg
= get_exec_file (1);
1767 /* Count how many \ " ' tab space there are in the name. */
1768 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1776 /* We need to quote this string so buildargv can pull it apart. */
1777 char *temp
= xmalloc (strlen (arg
) + count
+ 1 );
1781 make_cleanup (xfree
, temp
);
1784 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1786 strncpy (ptemp
, prev
, parg
- prev
);
1787 ptemp
+= parg
- prev
;
1791 strcpy (ptemp
, prev
);
1797 target_load (arg
, from_tty
);
1799 /* After re-loading the executable, we don't really know which
1800 overlays are mapped any more. */
1801 overlay_cache_invalid
= 1;
1804 /* This version of "load" should be usable for any target. Currently
1805 it is just used for remote targets, not inftarg.c or core files,
1806 on the theory that only in that case is it useful.
1808 Avoiding xmodem and the like seems like a win (a) because we don't have
1809 to worry about finding it, and (b) On VMS, fork() is very slow and so
1810 we don't want to run a subprocess. On the other hand, I'm not sure how
1811 performance compares. */
1813 static int validate_download
= 0;
1815 /* Callback service function for generic_load (bfd_map_over_sections). */
1818 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1820 bfd_size_type
*sum
= data
;
1822 *sum
+= bfd_get_section_size (asec
);
1825 /* Opaque data for load_section_callback. */
1826 struct load_section_data
{
1827 unsigned long load_offset
;
1828 struct load_progress_data
*progress_data
;
1829 VEC(memory_write_request_s
) *requests
;
1832 /* Opaque data for load_progress. */
1833 struct load_progress_data
{
1834 /* Cumulative data. */
1835 unsigned long write_count
;
1836 unsigned long data_count
;
1837 bfd_size_type total_size
;
1840 /* Opaque data for load_progress for a single section. */
1841 struct load_progress_section_data
{
1842 struct load_progress_data
*cumulative
;
1844 /* Per-section data. */
1845 const char *section_name
;
1846 ULONGEST section_sent
;
1847 ULONGEST section_size
;
1852 /* Target write callback routine for progress reporting. */
1855 load_progress (ULONGEST bytes
, void *untyped_arg
)
1857 struct load_progress_section_data
*args
= untyped_arg
;
1858 struct load_progress_data
*totals
;
1861 /* Writing padding data. No easy way to get at the cumulative
1862 stats, so just ignore this. */
1865 totals
= args
->cumulative
;
1867 if (bytes
== 0 && args
->section_sent
== 0)
1869 /* The write is just starting. Let the user know we've started
1871 ui_out_message (uiout
, 0, "Loading section %s, size %s lma %s\n",
1872 args
->section_name
, hex_string (args
->section_size
),
1873 paddress (target_gdbarch
, args
->lma
));
1877 if (validate_download
)
1879 /* Broken memories and broken monitors manifest themselves here
1880 when bring new computers to life. This doubles already slow
1882 /* NOTE: cagney/1999-10-18: A more efficient implementation
1883 might add a verify_memory() method to the target vector and
1884 then use that. remote.c could implement that method using
1885 the ``qCRC'' packet. */
1886 gdb_byte
*check
= xmalloc (bytes
);
1887 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
1889 if (target_read_memory (args
->lma
, check
, bytes
) != 0)
1890 error (_("Download verify read failed at %s"),
1891 paddress (target_gdbarch
, args
->lma
));
1892 if (memcmp (args
->buffer
, check
, bytes
) != 0)
1893 error (_("Download verify compare failed at %s"),
1894 paddress (target_gdbarch
, args
->lma
));
1895 do_cleanups (verify_cleanups
);
1897 totals
->data_count
+= bytes
;
1899 args
->buffer
+= bytes
;
1900 totals
->write_count
+= 1;
1901 args
->section_sent
+= bytes
;
1903 || (deprecated_ui_load_progress_hook
!= NULL
1904 && deprecated_ui_load_progress_hook (args
->section_name
,
1905 args
->section_sent
)))
1906 error (_("Canceled the download"));
1908 if (deprecated_show_load_progress
!= NULL
)
1909 deprecated_show_load_progress (args
->section_name
,
1913 totals
->total_size
);
1916 /* Callback service function for generic_load (bfd_map_over_sections). */
1919 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1921 struct memory_write_request
*new_request
;
1922 struct load_section_data
*args
= data
;
1923 struct load_progress_section_data
*section_data
;
1924 bfd_size_type size
= bfd_get_section_size (asec
);
1926 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1928 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
1934 new_request
= VEC_safe_push (memory_write_request_s
,
1935 args
->requests
, NULL
);
1936 memset (new_request
, 0, sizeof (struct memory_write_request
));
1937 section_data
= xcalloc (1, sizeof (struct load_progress_section_data
));
1938 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1939 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size
1941 new_request
->data
= xmalloc (size
);
1942 new_request
->baton
= section_data
;
1944 buffer
= new_request
->data
;
1946 section_data
->cumulative
= args
->progress_data
;
1947 section_data
->section_name
= sect_name
;
1948 section_data
->section_size
= size
;
1949 section_data
->lma
= new_request
->begin
;
1950 section_data
->buffer
= buffer
;
1952 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1955 /* Clean up an entire memory request vector, including load
1956 data and progress records. */
1959 clear_memory_write_data (void *arg
)
1961 VEC(memory_write_request_s
) **vec_p
= arg
;
1962 VEC(memory_write_request_s
) *vec
= *vec_p
;
1964 struct memory_write_request
*mr
;
1966 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
1971 VEC_free (memory_write_request_s
, vec
);
1975 generic_load (char *args
, int from_tty
)
1978 struct timeval start_time
, end_time
;
1980 struct cleanup
*old_cleanups
= make_cleanup (null_cleanup
, 0);
1981 struct load_section_data cbdata
;
1982 struct load_progress_data total_progress
;
1987 memset (&cbdata
, 0, sizeof (cbdata
));
1988 memset (&total_progress
, 0, sizeof (total_progress
));
1989 cbdata
.progress_data
= &total_progress
;
1991 make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
1994 error_no_arg (_("file to load"));
1996 argv
= gdb_buildargv (args
);
1997 make_cleanup_freeargv (argv
);
1999 filename
= tilde_expand (argv
[0]);
2000 make_cleanup (xfree
, filename
);
2002 if (argv
[1] != NULL
)
2006 cbdata
.load_offset
= strtoul (argv
[1], &endptr
, 0);
2008 /* If the last word was not a valid number then
2009 treat it as a file name with spaces in. */
2010 if (argv
[1] == endptr
)
2011 error (_("Invalid download offset:%s."), argv
[1]);
2013 if (argv
[2] != NULL
)
2014 error (_("Too many parameters."));
2017 /* Open the file for loading. */
2018 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
2019 if (loadfile_bfd
== NULL
)
2021 perror_with_name (filename
);
2025 /* FIXME: should be checking for errors from bfd_close (for one thing,
2026 on error it does not free all the storage associated with the
2028 make_cleanup_bfd_close (loadfile_bfd
);
2030 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
2032 error (_("\"%s\" is not an object file: %s"), filename
,
2033 bfd_errmsg (bfd_get_error ()));
2036 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
2037 (void *) &total_progress
.total_size
);
2039 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
2041 gettimeofday (&start_time
, NULL
);
2043 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2044 load_progress
) != 0)
2045 error (_("Load failed"));
2047 gettimeofday (&end_time
, NULL
);
2049 entry
= bfd_get_start_address (loadfile_bfd
);
2050 ui_out_text (uiout
, "Start address ");
2051 ui_out_field_fmt (uiout
, "address", "%s", paddress (target_gdbarch
, entry
));
2052 ui_out_text (uiout
, ", load size ");
2053 ui_out_field_fmt (uiout
, "load-size", "%lu", total_progress
.data_count
);
2054 ui_out_text (uiout
, "\n");
2055 /* We were doing this in remote-mips.c, I suspect it is right
2056 for other targets too. */
2057 regcache_write_pc (get_current_regcache (), entry
);
2059 /* Reset breakpoints, now that we have changed the load image. For
2060 instance, breakpoints may have been set (or reset, by
2061 post_create_inferior) while connected to the target but before we
2062 loaded the program. In that case, the prologue analyzer could
2063 have read instructions from the target to find the right
2064 breakpoint locations. Loading has changed the contents of that
2067 breakpoint_re_set ();
2069 /* FIXME: are we supposed to call symbol_file_add or not? According
2070 to a comment from remote-mips.c (where a call to symbol_file_add
2071 was commented out), making the call confuses GDB if more than one
2072 file is loaded in. Some targets do (e.g., remote-vx.c) but
2073 others don't (or didn't - perhaps they have all been deleted). */
2075 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2076 total_progress
.write_count
,
2077 &start_time
, &end_time
);
2079 do_cleanups (old_cleanups
);
2082 /* Report how fast the transfer went. */
2084 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
2085 replaced by print_transfer_performance (with a very different
2086 function signature). */
2089 report_transfer_performance (unsigned long data_count
, time_t start_time
,
2092 struct timeval start
, end
;
2094 start
.tv_sec
= start_time
;
2096 end
.tv_sec
= end_time
;
2099 print_transfer_performance (gdb_stdout
, data_count
, 0, &start
, &end
);
2103 print_transfer_performance (struct ui_file
*stream
,
2104 unsigned long data_count
,
2105 unsigned long write_count
,
2106 const struct timeval
*start_time
,
2107 const struct timeval
*end_time
)
2109 ULONGEST time_count
;
2111 /* Compute the elapsed time in milliseconds, as a tradeoff between
2112 accuracy and overflow. */
2113 time_count
= (end_time
->tv_sec
- start_time
->tv_sec
) * 1000;
2114 time_count
+= (end_time
->tv_usec
- start_time
->tv_usec
) / 1000;
2116 ui_out_text (uiout
, "Transfer rate: ");
2119 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / time_count
;
2121 if (ui_out_is_mi_like_p (uiout
))
2123 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
* 8);
2124 ui_out_text (uiout
, " bits/sec");
2126 else if (rate
< 1024)
2128 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
);
2129 ui_out_text (uiout
, " bytes/sec");
2133 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
/ 1024);
2134 ui_out_text (uiout
, " KB/sec");
2139 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
2140 ui_out_text (uiout
, " bits in <1 sec");
2142 if (write_count
> 0)
2144 ui_out_text (uiout
, ", ");
2145 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
2146 ui_out_text (uiout
, " bytes/write");
2148 ui_out_text (uiout
, ".\n");
2151 /* This function allows the addition of incrementally linked object files.
2152 It does not modify any state in the target, only in the debugger. */
2153 /* Note: ezannoni 2000-04-13 This function/command used to have a
2154 special case syntax for the rombug target (Rombug is the boot
2155 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2156 rombug case, the user doesn't need to supply a text address,
2157 instead a call to target_link() (in target.c) would supply the
2158 value to use. We are now discontinuing this type of ad hoc syntax. */
2161 add_symbol_file_command (char *args
, int from_tty
)
2163 struct gdbarch
*gdbarch
= get_current_arch ();
2164 char *filename
= NULL
;
2165 int flags
= OBJF_USERLOADED
;
2167 int section_index
= 0;
2171 int expecting_sec_name
= 0;
2172 int expecting_sec_addr
= 0;
2181 struct section_addr_info
*section_addrs
;
2182 struct sect_opt
*sect_opts
= NULL
;
2183 size_t num_sect_opts
= 0;
2184 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2187 sect_opts
= (struct sect_opt
*) xmalloc (num_sect_opts
2188 * sizeof (struct sect_opt
));
2193 error (_("add-symbol-file takes a file name and an address"));
2195 argv
= gdb_buildargv (args
);
2196 make_cleanup_freeargv (argv
);
2198 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2200 /* Process the argument. */
2203 /* The first argument is the file name. */
2204 filename
= tilde_expand (arg
);
2205 make_cleanup (xfree
, filename
);
2210 /* The second argument is always the text address at which
2211 to load the program. */
2212 sect_opts
[section_index
].name
= ".text";
2213 sect_opts
[section_index
].value
= arg
;
2214 if (++section_index
>= num_sect_opts
)
2217 sect_opts
= ((struct sect_opt
*)
2218 xrealloc (sect_opts
,
2220 * sizeof (struct sect_opt
)));
2225 /* It's an option (starting with '-') or it's an argument
2230 if (strcmp (arg
, "-readnow") == 0)
2231 flags
|= OBJF_READNOW
;
2232 else if (strcmp (arg
, "-s") == 0)
2234 expecting_sec_name
= 1;
2235 expecting_sec_addr
= 1;
2240 if (expecting_sec_name
)
2242 sect_opts
[section_index
].name
= arg
;
2243 expecting_sec_name
= 0;
2246 if (expecting_sec_addr
)
2248 sect_opts
[section_index
].value
= arg
;
2249 expecting_sec_addr
= 0;
2250 if (++section_index
>= num_sect_opts
)
2253 sect_opts
= ((struct sect_opt
*)
2254 xrealloc (sect_opts
,
2256 * sizeof (struct sect_opt
)));
2260 error (_("USAGE: add-symbol-file <filename> <textaddress>"
2261 " [-mapped] [-readnow] [-s <secname> <addr>]*"));
2266 /* This command takes at least two arguments. The first one is a
2267 filename, and the second is the address where this file has been
2268 loaded. Abort now if this address hasn't been provided by the
2270 if (section_index
< 1)
2271 error (_("The address where %s has been loaded is missing"), filename
);
2273 /* Print the prompt for the query below. And save the arguments into
2274 a sect_addr_info structure to be passed around to other
2275 functions. We have to split this up into separate print
2276 statements because hex_string returns a local static
2279 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename
);
2280 section_addrs
= alloc_section_addr_info (section_index
);
2281 make_cleanup (xfree
, section_addrs
);
2282 for (i
= 0; i
< section_index
; i
++)
2285 char *val
= sect_opts
[i
].value
;
2286 char *sec
= sect_opts
[i
].name
;
2288 addr
= parse_and_eval_address (val
);
2290 /* Here we store the section offsets in the order they were
2291 entered on the command line. */
2292 section_addrs
->other
[sec_num
].name
= sec
;
2293 section_addrs
->other
[sec_num
].addr
= addr
;
2294 printf_unfiltered ("\t%s_addr = %s\n", sec
,
2295 paddress (gdbarch
, addr
));
2298 /* The object's sections are initialized when a
2299 call is made to build_objfile_section_table (objfile).
2300 This happens in reread_symbols.
2301 At this point, we don't know what file type this is,
2302 so we can't determine what section names are valid. */
2305 if (from_tty
&& (!query ("%s", "")))
2306 error (_("Not confirmed."));
2308 symbol_file_add (filename
, from_tty
? SYMFILE_VERBOSE
: 0,
2309 section_addrs
, flags
);
2311 /* Getting new symbols may change our opinion about what is
2313 reinit_frame_cache ();
2314 do_cleanups (my_cleanups
);
2318 /* Re-read symbols if a symbol-file has changed. */
2320 reread_symbols (void)
2322 struct objfile
*objfile
;
2325 struct stat new_statbuf
;
2328 /* With the addition of shared libraries, this should be modified,
2329 the load time should be saved in the partial symbol tables, since
2330 different tables may come from different source files. FIXME.
2331 This routine should then walk down each partial symbol table
2332 and see if the symbol table that it originates from has been changed. */
2334 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2336 /* solib-sunos.c creates one objfile with obfd. */
2337 if (objfile
->obfd
== NULL
)
2340 /* Separate debug objfiles are handled in the main objfile. */
2341 if (objfile
->separate_debug_objfile_backlink
)
2344 /* If this object is from an archive (what you usually create with
2345 `ar', often called a `static library' on most systems, though
2346 a `shared library' on AIX is also an archive), then you should
2347 stat on the archive name, not member name. */
2348 if (objfile
->obfd
->my_archive
)
2349 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2351 res
= stat (objfile
->name
, &new_statbuf
);
2354 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2355 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2359 new_modtime
= new_statbuf
.st_mtime
;
2360 if (new_modtime
!= objfile
->mtime
)
2362 struct cleanup
*old_cleanups
;
2363 struct section_offsets
*offsets
;
2365 char *obfd_filename
;
2367 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2370 /* There are various functions like symbol_file_add,
2371 symfile_bfd_open, syms_from_objfile, etc., which might
2372 appear to do what we want. But they have various other
2373 effects which we *don't* want. So we just do stuff
2374 ourselves. We don't worry about mapped files (for one thing,
2375 any mapped file will be out of date). */
2377 /* If we get an error, blow away this objfile (not sure if
2378 that is the correct response for things like shared
2380 old_cleanups
= make_cleanup_free_objfile (objfile
);
2381 /* We need to do this whenever any symbols go away. */
2382 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2384 if (exec_bfd
!= NULL
2385 && filename_cmp (bfd_get_filename (objfile
->obfd
),
2386 bfd_get_filename (exec_bfd
)) == 0)
2388 /* Reload EXEC_BFD without asking anything. */
2390 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2393 /* Clean up any state BFD has sitting around. We don't need
2394 to close the descriptor but BFD lacks a way of closing the
2395 BFD without closing the descriptor. */
2396 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2397 if (!bfd_close (objfile
->obfd
))
2398 error (_("Can't close BFD for %s: %s"), objfile
->name
,
2399 bfd_errmsg (bfd_get_error ()));
2400 objfile
->obfd
= bfd_open_maybe_remote (obfd_filename
);
2401 if (objfile
->obfd
== NULL
)
2402 error (_("Can't open %s to read symbols."), objfile
->name
);
2404 objfile
->obfd
= gdb_bfd_ref (objfile
->obfd
);
2405 /* bfd_openr sets cacheable to true, which is what we want. */
2406 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2407 error (_("Can't read symbols from %s: %s."), objfile
->name
,
2408 bfd_errmsg (bfd_get_error ()));
2410 /* Save the offsets, we will nuke them with the rest of the
2412 num_offsets
= objfile
->num_sections
;
2413 offsets
= ((struct section_offsets
*)
2414 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2415 memcpy (offsets
, objfile
->section_offsets
,
2416 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2418 /* Remove any references to this objfile in the global
2420 preserve_values (objfile
);
2422 /* Nuke all the state that we will re-read. Much of the following
2423 code which sets things to NULL really is necessary to tell
2424 other parts of GDB that there is nothing currently there.
2426 Try to keep the freeing order compatible with free_objfile. */
2428 if (objfile
->sf
!= NULL
)
2430 (*objfile
->sf
->sym_finish
) (objfile
);
2433 clear_objfile_data (objfile
);
2435 /* Free the separate debug objfiles. It will be
2436 automatically recreated by sym_read. */
2437 free_objfile_separate_debug (objfile
);
2439 /* FIXME: Do we have to free a whole linked list, or is this
2441 if (objfile
->global_psymbols
.list
)
2442 xfree (objfile
->global_psymbols
.list
);
2443 memset (&objfile
->global_psymbols
, 0,
2444 sizeof (objfile
->global_psymbols
));
2445 if (objfile
->static_psymbols
.list
)
2446 xfree (objfile
->static_psymbols
.list
);
2447 memset (&objfile
->static_psymbols
, 0,
2448 sizeof (objfile
->static_psymbols
));
2450 /* Free the obstacks for non-reusable objfiles. */
2451 psymbol_bcache_free (objfile
->psymbol_cache
);
2452 objfile
->psymbol_cache
= psymbol_bcache_init ();
2453 bcache_xfree (objfile
->macro_cache
);
2454 objfile
->macro_cache
= bcache_xmalloc (NULL
, NULL
);
2455 bcache_xfree (objfile
->filename_cache
);
2456 objfile
->filename_cache
= bcache_xmalloc (NULL
,NULL
);
2457 if (objfile
->demangled_names_hash
!= NULL
)
2459 htab_delete (objfile
->demangled_names_hash
);
2460 objfile
->demangled_names_hash
= NULL
;
2462 obstack_free (&objfile
->objfile_obstack
, 0);
2463 objfile
->sections
= NULL
;
2464 objfile
->symtabs
= NULL
;
2465 objfile
->psymtabs
= NULL
;
2466 objfile
->psymtabs_addrmap
= NULL
;
2467 objfile
->free_psymtabs
= NULL
;
2468 objfile
->template_symbols
= NULL
;
2469 objfile
->msymbols
= NULL
;
2470 objfile
->deprecated_sym_private
= NULL
;
2471 objfile
->minimal_symbol_count
= 0;
2472 memset (&objfile
->msymbol_hash
, 0,
2473 sizeof (objfile
->msymbol_hash
));
2474 memset (&objfile
->msymbol_demangled_hash
, 0,
2475 sizeof (objfile
->msymbol_demangled_hash
));
2477 objfile
->psymbol_cache
= psymbol_bcache_init ();
2478 objfile
->macro_cache
= bcache_xmalloc (NULL
, NULL
);
2479 objfile
->filename_cache
= bcache_xmalloc (NULL
, NULL
);
2480 /* obstack_init also initializes the obstack so it is
2481 empty. We could use obstack_specify_allocation but
2482 gdb_obstack.h specifies the alloc/dealloc
2484 obstack_init (&objfile
->objfile_obstack
);
2485 if (build_objfile_section_table (objfile
))
2487 error (_("Can't find the file sections in `%s': %s"),
2488 objfile
->name
, bfd_errmsg (bfd_get_error ()));
2490 terminate_minimal_symbol_table (objfile
);
2492 /* We use the same section offsets as from last time. I'm not
2493 sure whether that is always correct for shared libraries. */
2494 objfile
->section_offsets
= (struct section_offsets
*)
2495 obstack_alloc (&objfile
->objfile_obstack
,
2496 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2497 memcpy (objfile
->section_offsets
, offsets
,
2498 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2499 objfile
->num_sections
= num_offsets
;
2501 /* What the hell is sym_new_init for, anyway? The concept of
2502 distinguishing between the main file and additional files
2503 in this way seems rather dubious. */
2504 if (objfile
== symfile_objfile
)
2506 (*objfile
->sf
->sym_new_init
) (objfile
);
2509 (*objfile
->sf
->sym_init
) (objfile
);
2510 clear_complaints (&symfile_complaints
, 1, 1);
2511 /* Do not set flags as this is safe and we don't want to be
2513 (*objfile
->sf
->sym_read
) (objfile
, 0);
2514 if ((objfile
->flags
& OBJF_PSYMTABS_READ
) != 0)
2516 objfile
->flags
&= ~OBJF_PSYMTABS_READ
;
2517 require_partial_symbols (objfile
, 0);
2520 if (!objfile_has_symbols (objfile
))
2523 printf_unfiltered (_("(no debugging symbols found)\n"));
2527 /* We're done reading the symbol file; finish off complaints. */
2528 clear_complaints (&symfile_complaints
, 0, 1);
2530 /* Getting new symbols may change our opinion about what is
2533 reinit_frame_cache ();
2535 /* Discard cleanups as symbol reading was successful. */
2536 discard_cleanups (old_cleanups
);
2538 /* If the mtime has changed between the time we set new_modtime
2539 and now, we *want* this to be out of date, so don't call stat
2541 objfile
->mtime
= new_modtime
;
2543 init_entry_point_info (objfile
);
2549 /* Notify objfiles that we've modified objfile sections. */
2550 objfiles_changed ();
2552 clear_symtab_users (0);
2553 /* At least one objfile has changed, so we can consider that
2554 the executable we're debugging has changed too. */
2555 observer_notify_executable_changed ();
2568 static filename_language
*filename_language_table
;
2569 static int fl_table_size
, fl_table_next
;
2572 add_filename_language (char *ext
, enum language lang
)
2574 if (fl_table_next
>= fl_table_size
)
2576 fl_table_size
+= 10;
2577 filename_language_table
=
2578 xrealloc (filename_language_table
,
2579 fl_table_size
* sizeof (*filename_language_table
));
2582 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2583 filename_language_table
[fl_table_next
].lang
= lang
;
2587 static char *ext_args
;
2589 show_ext_args (struct ui_file
*file
, int from_tty
,
2590 struct cmd_list_element
*c
, const char *value
)
2592 fprintf_filtered (file
,
2593 _("Mapping between filename extension "
2594 "and source language is \"%s\".\n"),
2599 set_ext_lang_command (char *args
, int from_tty
, struct cmd_list_element
*e
)
2602 char *cp
= ext_args
;
2605 /* First arg is filename extension, starting with '.' */
2607 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2609 /* Find end of first arg. */
2610 while (*cp
&& !isspace (*cp
))
2614 error (_("'%s': two arguments required -- "
2615 "filename extension and language"),
2618 /* Null-terminate first arg. */
2621 /* Find beginning of second arg, which should be a source language. */
2622 while (*cp
&& isspace (*cp
))
2626 error (_("'%s': two arguments required -- "
2627 "filename extension and language"),
2630 /* Lookup the language from among those we know. */
2631 lang
= language_enum (cp
);
2633 /* Now lookup the filename extension: do we already know it? */
2634 for (i
= 0; i
< fl_table_next
; i
++)
2635 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2638 if (i
>= fl_table_next
)
2640 /* New file extension. */
2641 add_filename_language (ext_args
, lang
);
2645 /* Redefining a previously known filename extension. */
2648 /* query ("Really make files of type %s '%s'?", */
2649 /* ext_args, language_str (lang)); */
2651 xfree (filename_language_table
[i
].ext
);
2652 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2653 filename_language_table
[i
].lang
= lang
;
2658 info_ext_lang_command (char *args
, int from_tty
)
2662 printf_filtered (_("Filename extensions and the languages they represent:"));
2663 printf_filtered ("\n\n");
2664 for (i
= 0; i
< fl_table_next
; i
++)
2665 printf_filtered ("\t%s\t- %s\n",
2666 filename_language_table
[i
].ext
,
2667 language_str (filename_language_table
[i
].lang
));
2671 init_filename_language_table (void)
2673 if (fl_table_size
== 0) /* Protect against repetition. */
2677 filename_language_table
=
2678 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
2679 add_filename_language (".c", language_c
);
2680 add_filename_language (".d", language_d
);
2681 add_filename_language (".C", language_cplus
);
2682 add_filename_language (".cc", language_cplus
);
2683 add_filename_language (".cp", language_cplus
);
2684 add_filename_language (".cpp", language_cplus
);
2685 add_filename_language (".cxx", language_cplus
);
2686 add_filename_language (".c++", language_cplus
);
2687 add_filename_language (".java", language_java
);
2688 add_filename_language (".class", language_java
);
2689 add_filename_language (".m", language_objc
);
2690 add_filename_language (".f", language_fortran
);
2691 add_filename_language (".F", language_fortran
);
2692 add_filename_language (".for", language_fortran
);
2693 add_filename_language (".FOR", language_fortran
);
2694 add_filename_language (".ftn", language_fortran
);
2695 add_filename_language (".FTN", language_fortran
);
2696 add_filename_language (".fpp", language_fortran
);
2697 add_filename_language (".FPP", language_fortran
);
2698 add_filename_language (".f90", language_fortran
);
2699 add_filename_language (".F90", language_fortran
);
2700 add_filename_language (".f95", language_fortran
);
2701 add_filename_language (".F95", language_fortran
);
2702 add_filename_language (".f03", language_fortran
);
2703 add_filename_language (".F03", language_fortran
);
2704 add_filename_language (".f08", language_fortran
);
2705 add_filename_language (".F08", language_fortran
);
2706 add_filename_language (".s", language_asm
);
2707 add_filename_language (".sx", language_asm
);
2708 add_filename_language (".S", language_asm
);
2709 add_filename_language (".pas", language_pascal
);
2710 add_filename_language (".p", language_pascal
);
2711 add_filename_language (".pp", language_pascal
);
2712 add_filename_language (".adb", language_ada
);
2713 add_filename_language (".ads", language_ada
);
2714 add_filename_language (".a", language_ada
);
2715 add_filename_language (".ada", language_ada
);
2716 add_filename_language (".dg", language_ada
);
2721 deduce_language_from_filename (const char *filename
)
2726 if (filename
!= NULL
)
2727 if ((cp
= strrchr (filename
, '.')) != NULL
)
2728 for (i
= 0; i
< fl_table_next
; i
++)
2729 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2730 return filename_language_table
[i
].lang
;
2732 return language_unknown
;
2737 Allocate and partly initialize a new symbol table. Return a pointer
2738 to it. error() if no space.
2740 Caller must set these fields:
2749 allocate_symtab (const char *filename
, struct objfile
*objfile
)
2751 struct symtab
*symtab
;
2753 symtab
= (struct symtab
*)
2754 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symtab
));
2755 memset (symtab
, 0, sizeof (*symtab
));
2756 symtab
->filename
= (char *) bcache (filename
, strlen (filename
) + 1,
2757 objfile
->filename_cache
);
2758 symtab
->fullname
= NULL
;
2759 symtab
->language
= deduce_language_from_filename (filename
);
2760 symtab
->debugformat
= "unknown";
2762 /* Hook it to the objfile it comes from. */
2764 symtab
->objfile
= objfile
;
2765 symtab
->next
= objfile
->symtabs
;
2766 objfile
->symtabs
= symtab
;
2772 /* Reset all data structures in gdb which may contain references to symbol
2773 table data. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
2776 clear_symtab_users (int add_flags
)
2778 /* Someday, we should do better than this, by only blowing away
2779 the things that really need to be blown. */
2781 /* Clear the "current" symtab first, because it is no longer valid.
2782 breakpoint_re_set may try to access the current symtab. */
2783 clear_current_source_symtab_and_line ();
2786 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
2787 breakpoint_re_set ();
2788 set_default_breakpoint (0, NULL
, 0, 0, 0);
2789 clear_pc_function_cache ();
2790 observer_notify_new_objfile (NULL
);
2792 /* Clear globals which might have pointed into a removed objfile.
2793 FIXME: It's not clear which of these are supposed to persist
2794 between expressions and which ought to be reset each time. */
2795 expression_context_block
= NULL
;
2796 innermost_block
= NULL
;
2798 /* Varobj may refer to old symbols, perform a cleanup. */
2799 varobj_invalidate ();
2804 clear_symtab_users_cleanup (void *ignore
)
2806 clear_symtab_users (0);
2810 The following code implements an abstraction for debugging overlay sections.
2812 The target model is as follows:
2813 1) The gnu linker will permit multiple sections to be mapped into the
2814 same VMA, each with its own unique LMA (or load address).
2815 2) It is assumed that some runtime mechanism exists for mapping the
2816 sections, one by one, from the load address into the VMA address.
2817 3) This code provides a mechanism for gdb to keep track of which
2818 sections should be considered to be mapped from the VMA to the LMA.
2819 This information is used for symbol lookup, and memory read/write.
2820 For instance, if a section has been mapped then its contents
2821 should be read from the VMA, otherwise from the LMA.
2823 Two levels of debugger support for overlays are available. One is
2824 "manual", in which the debugger relies on the user to tell it which
2825 overlays are currently mapped. This level of support is
2826 implemented entirely in the core debugger, and the information about
2827 whether a section is mapped is kept in the objfile->obj_section table.
2829 The second level of support is "automatic", and is only available if
2830 the target-specific code provides functionality to read the target's
2831 overlay mapping table, and translate its contents for the debugger
2832 (by updating the mapped state information in the obj_section tables).
2834 The interface is as follows:
2836 overlay map <name> -- tell gdb to consider this section mapped
2837 overlay unmap <name> -- tell gdb to consider this section unmapped
2838 overlay list -- list the sections that GDB thinks are mapped
2839 overlay read-target -- get the target's state of what's mapped
2840 overlay off/manual/auto -- set overlay debugging state
2841 Functional interface:
2842 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2843 section, return that section.
2844 find_pc_overlay(pc): find any overlay section that contains
2845 the pc, either in its VMA or its LMA
2846 section_is_mapped(sect): true if overlay is marked as mapped
2847 section_is_overlay(sect): true if section's VMA != LMA
2848 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2849 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2850 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2851 overlay_mapped_address(...): map an address from section's LMA to VMA
2852 overlay_unmapped_address(...): map an address from section's VMA to LMA
2853 symbol_overlayed_address(...): Return a "current" address for symbol:
2854 either in VMA or LMA depending on whether
2855 the symbol's section is currently mapped. */
2857 /* Overlay debugging state: */
2859 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2860 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state. */
2862 /* Function: section_is_overlay (SECTION)
2863 Returns true if SECTION has VMA not equal to LMA, ie.
2864 SECTION is loaded at an address different from where it will "run". */
2867 section_is_overlay (struct obj_section
*section
)
2869 if (overlay_debugging
&& section
)
2871 bfd
*abfd
= section
->objfile
->obfd
;
2872 asection
*bfd_section
= section
->the_bfd_section
;
2874 if (bfd_section_lma (abfd
, bfd_section
) != 0
2875 && bfd_section_lma (abfd
, bfd_section
)
2876 != bfd_section_vma (abfd
, bfd_section
))
2883 /* Function: overlay_invalidate_all (void)
2884 Invalidate the mapped state of all overlay sections (mark it as stale). */
2887 overlay_invalidate_all (void)
2889 struct objfile
*objfile
;
2890 struct obj_section
*sect
;
2892 ALL_OBJSECTIONS (objfile
, sect
)
2893 if (section_is_overlay (sect
))
2894 sect
->ovly_mapped
= -1;
2897 /* Function: section_is_mapped (SECTION)
2898 Returns true if section is an overlay, and is currently mapped.
2900 Access to the ovly_mapped flag is restricted to this function, so
2901 that we can do automatic update. If the global flag
2902 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2903 overlay_invalidate_all. If the mapped state of the particular
2904 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2907 section_is_mapped (struct obj_section
*osect
)
2909 struct gdbarch
*gdbarch
;
2911 if (osect
== 0 || !section_is_overlay (osect
))
2914 switch (overlay_debugging
)
2918 return 0; /* overlay debugging off */
2919 case ovly_auto
: /* overlay debugging automatic */
2920 /* Unles there is a gdbarch_overlay_update function,
2921 there's really nothing useful to do here (can't really go auto). */
2922 gdbarch
= get_objfile_arch (osect
->objfile
);
2923 if (gdbarch_overlay_update_p (gdbarch
))
2925 if (overlay_cache_invalid
)
2927 overlay_invalidate_all ();
2928 overlay_cache_invalid
= 0;
2930 if (osect
->ovly_mapped
== -1)
2931 gdbarch_overlay_update (gdbarch
, osect
);
2933 /* fall thru to manual case */
2934 case ovly_on
: /* overlay debugging manual */
2935 return osect
->ovly_mapped
== 1;
2939 /* Function: pc_in_unmapped_range
2940 If PC falls into the lma range of SECTION, return true, else false. */
2943 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
2945 if (section_is_overlay (section
))
2947 bfd
*abfd
= section
->objfile
->obfd
;
2948 asection
*bfd_section
= section
->the_bfd_section
;
2950 /* We assume the LMA is relocated by the same offset as the VMA. */
2951 bfd_vma size
= bfd_get_section_size (bfd_section
);
2952 CORE_ADDR offset
= obj_section_offset (section
);
2954 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
2955 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
2962 /* Function: pc_in_mapped_range
2963 If PC falls into the vma range of SECTION, return true, else false. */
2966 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
2968 if (section_is_overlay (section
))
2970 if (obj_section_addr (section
) <= pc
2971 && pc
< obj_section_endaddr (section
))
2979 /* Return true if the mapped ranges of sections A and B overlap, false
2982 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
2984 CORE_ADDR a_start
= obj_section_addr (a
);
2985 CORE_ADDR a_end
= obj_section_endaddr (a
);
2986 CORE_ADDR b_start
= obj_section_addr (b
);
2987 CORE_ADDR b_end
= obj_section_endaddr (b
);
2989 return (a_start
< b_end
&& b_start
< a_end
);
2992 /* Function: overlay_unmapped_address (PC, SECTION)
2993 Returns the address corresponding to PC in the unmapped (load) range.
2994 May be the same as PC. */
2997 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
2999 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
3001 bfd
*abfd
= section
->objfile
->obfd
;
3002 asection
*bfd_section
= section
->the_bfd_section
;
3004 return pc
+ bfd_section_lma (abfd
, bfd_section
)
3005 - bfd_section_vma (abfd
, bfd_section
);
3011 /* Function: overlay_mapped_address (PC, SECTION)
3012 Returns the address corresponding to PC in the mapped (runtime) range.
3013 May be the same as PC. */
3016 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3018 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3020 bfd
*abfd
= section
->objfile
->obfd
;
3021 asection
*bfd_section
= section
->the_bfd_section
;
3023 return pc
+ bfd_section_vma (abfd
, bfd_section
)
3024 - bfd_section_lma (abfd
, bfd_section
);
3031 /* Function: symbol_overlayed_address
3032 Return one of two addresses (relative to the VMA or to the LMA),
3033 depending on whether the section is mapped or not. */
3036 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3038 if (overlay_debugging
)
3040 /* If the symbol has no section, just return its regular address. */
3043 /* If the symbol's section is not an overlay, just return its
3045 if (!section_is_overlay (section
))
3047 /* If the symbol's section is mapped, just return its address. */
3048 if (section_is_mapped (section
))
3051 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3052 * then return its LOADED address rather than its vma address!!
3054 return overlay_unmapped_address (address
, section
);
3059 /* Function: find_pc_overlay (PC)
3060 Return the best-match overlay section for PC:
3061 If PC matches a mapped overlay section's VMA, return that section.
3062 Else if PC matches an unmapped section's VMA, return that section.
3063 Else if PC matches an unmapped section's LMA, return that section. */
3065 struct obj_section
*
3066 find_pc_overlay (CORE_ADDR pc
)
3068 struct objfile
*objfile
;
3069 struct obj_section
*osect
, *best_match
= NULL
;
3071 if (overlay_debugging
)
3072 ALL_OBJSECTIONS (objfile
, osect
)
3073 if (section_is_overlay (osect
))
3075 if (pc_in_mapped_range (pc
, osect
))
3077 if (section_is_mapped (osect
))
3082 else if (pc_in_unmapped_range (pc
, osect
))
3088 /* Function: find_pc_mapped_section (PC)
3089 If PC falls into the VMA address range of an overlay section that is
3090 currently marked as MAPPED, return that section. Else return NULL. */
3092 struct obj_section
*
3093 find_pc_mapped_section (CORE_ADDR pc
)
3095 struct objfile
*objfile
;
3096 struct obj_section
*osect
;
3098 if (overlay_debugging
)
3099 ALL_OBJSECTIONS (objfile
, osect
)
3100 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3106 /* Function: list_overlays_command
3107 Print a list of mapped sections and their PC ranges. */
3110 list_overlays_command (char *args
, int from_tty
)
3113 struct objfile
*objfile
;
3114 struct obj_section
*osect
;
3116 if (overlay_debugging
)
3117 ALL_OBJSECTIONS (objfile
, osect
)
3118 if (section_is_mapped (osect
))
3120 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3125 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3126 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3127 size
= bfd_get_section_size (osect
->the_bfd_section
);
3128 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3130 printf_filtered ("Section %s, loaded at ", name
);
3131 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3132 puts_filtered (" - ");
3133 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3134 printf_filtered (", mapped at ");
3135 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3136 puts_filtered (" - ");
3137 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3138 puts_filtered ("\n");
3143 printf_filtered (_("No sections are mapped.\n"));
3146 /* Function: map_overlay_command
3147 Mark the named section as mapped (ie. residing at its VMA address). */
3150 map_overlay_command (char *args
, int from_tty
)
3152 struct objfile
*objfile
, *objfile2
;
3153 struct obj_section
*sec
, *sec2
;
3155 if (!overlay_debugging
)
3156 error (_("Overlay debugging not enabled. Use "
3157 "either the 'overlay auto' or\n"
3158 "the 'overlay manual' command."));
3160 if (args
== 0 || *args
== 0)
3161 error (_("Argument required: name of an overlay section"));
3163 /* First, find a section matching the user supplied argument. */
3164 ALL_OBJSECTIONS (objfile
, sec
)
3165 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3167 /* Now, check to see if the section is an overlay. */
3168 if (!section_is_overlay (sec
))
3169 continue; /* not an overlay section */
3171 /* Mark the overlay as "mapped". */
3172 sec
->ovly_mapped
= 1;
3174 /* Next, make a pass and unmap any sections that are
3175 overlapped by this new section: */
3176 ALL_OBJSECTIONS (objfile2
, sec2
)
3177 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
, sec2
))
3180 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3181 bfd_section_name (objfile
->obfd
,
3182 sec2
->the_bfd_section
));
3183 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2. */
3187 error (_("No overlay section called %s"), args
);
3190 /* Function: unmap_overlay_command
3191 Mark the overlay section as unmapped
3192 (ie. resident in its LMA address range, rather than the VMA range). */
3195 unmap_overlay_command (char *args
, int from_tty
)
3197 struct objfile
*objfile
;
3198 struct obj_section
*sec
;
3200 if (!overlay_debugging
)
3201 error (_("Overlay debugging not enabled. "
3202 "Use either the 'overlay auto' or\n"
3203 "the 'overlay manual' command."));
3205 if (args
== 0 || *args
== 0)
3206 error (_("Argument required: name of an overlay section"));
3208 /* First, find a section matching the user supplied argument. */
3209 ALL_OBJSECTIONS (objfile
, sec
)
3210 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3212 if (!sec
->ovly_mapped
)
3213 error (_("Section %s is not mapped"), args
);
3214 sec
->ovly_mapped
= 0;
3217 error (_("No overlay section called %s"), args
);
3220 /* Function: overlay_auto_command
3221 A utility command to turn on overlay debugging.
3222 Possibly this should be done via a set/show command. */
3225 overlay_auto_command (char *args
, int from_tty
)
3227 overlay_debugging
= ovly_auto
;
3228 enable_overlay_breakpoints ();
3230 printf_unfiltered (_("Automatic overlay debugging enabled."));
3233 /* Function: overlay_manual_command
3234 A utility command to turn on overlay debugging.
3235 Possibly this should be done via a set/show command. */
3238 overlay_manual_command (char *args
, int from_tty
)
3240 overlay_debugging
= ovly_on
;
3241 disable_overlay_breakpoints ();
3243 printf_unfiltered (_("Overlay debugging enabled."));
3246 /* Function: overlay_off_command
3247 A utility command to turn on overlay debugging.
3248 Possibly this should be done via a set/show command. */
3251 overlay_off_command (char *args
, int from_tty
)
3253 overlay_debugging
= ovly_off
;
3254 disable_overlay_breakpoints ();
3256 printf_unfiltered (_("Overlay debugging disabled."));
3260 overlay_load_command (char *args
, int from_tty
)
3262 struct gdbarch
*gdbarch
= get_current_arch ();
3264 if (gdbarch_overlay_update_p (gdbarch
))
3265 gdbarch_overlay_update (gdbarch
, NULL
);
3267 error (_("This target does not know how to read its overlay state."));
3270 /* Function: overlay_command
3271 A place-holder for a mis-typed command. */
3273 /* Command list chain containing all defined "overlay" subcommands. */
3274 struct cmd_list_element
*overlaylist
;
3277 overlay_command (char *args
, int from_tty
)
3280 ("\"overlay\" must be followed by the name of an overlay command.\n");
3281 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3285 /* Target Overlays for the "Simplest" overlay manager:
3287 This is GDB's default target overlay layer. It works with the
3288 minimal overlay manager supplied as an example by Cygnus. The
3289 entry point is via a function pointer "gdbarch_overlay_update",
3290 so targets that use a different runtime overlay manager can
3291 substitute their own overlay_update function and take over the
3294 The overlay_update function pokes around in the target's data structures
3295 to see what overlays are mapped, and updates GDB's overlay mapping with
3298 In this simple implementation, the target data structures are as follows:
3299 unsigned _novlys; /# number of overlay sections #/
3300 unsigned _ovly_table[_novlys][4] = {
3301 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3302 {..., ..., ..., ...},
3304 unsigned _novly_regions; /# number of overlay regions #/
3305 unsigned _ovly_region_table[_novly_regions][3] = {
3306 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3309 These functions will attempt to update GDB's mappedness state in the
3310 symbol section table, based on the target's mappedness state.
3312 To do this, we keep a cached copy of the target's _ovly_table, and
3313 attempt to detect when the cached copy is invalidated. The main
3314 entry point is "simple_overlay_update(SECT), which looks up SECT in
3315 the cached table and re-reads only the entry for that section from
3316 the target (whenever possible). */
3318 /* Cached, dynamically allocated copies of the target data structures: */
3319 static unsigned (*cache_ovly_table
)[4] = 0;
3320 static unsigned cache_novlys
= 0;
3321 static CORE_ADDR cache_ovly_table_base
= 0;
3324 VMA
, SIZE
, LMA
, MAPPED
3327 /* Throw away the cached copy of _ovly_table. */
3329 simple_free_overlay_table (void)
3331 if (cache_ovly_table
)
3332 xfree (cache_ovly_table
);
3334 cache_ovly_table
= NULL
;
3335 cache_ovly_table_base
= 0;
3338 /* Read an array of ints of size SIZE from the target into a local buffer.
3339 Convert to host order. int LEN is number of ints. */
3341 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3342 int len
, int size
, enum bfd_endian byte_order
)
3344 /* FIXME (alloca): Not safe if array is very large. */
3345 gdb_byte
*buf
= alloca (len
* size
);
3348 read_memory (memaddr
, buf
, len
* size
);
3349 for (i
= 0; i
< len
; i
++)
3350 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3353 /* Find and grab a copy of the target _ovly_table
3354 (and _novlys, which is needed for the table's size). */
3356 simple_read_overlay_table (void)
3358 struct minimal_symbol
*novlys_msym
, *ovly_table_msym
;
3359 struct gdbarch
*gdbarch
;
3361 enum bfd_endian byte_order
;
3363 simple_free_overlay_table ();
3364 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3367 error (_("Error reading inferior's overlay table: "
3368 "couldn't find `_novlys' variable\n"
3369 "in inferior. Use `overlay manual' mode."));
3373 ovly_table_msym
= lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3374 if (! ovly_table_msym
)
3376 error (_("Error reading inferior's overlay table: couldn't find "
3377 "`_ovly_table' array\n"
3378 "in inferior. Use `overlay manual' mode."));
3382 gdbarch
= get_objfile_arch (msymbol_objfile (ovly_table_msym
));
3383 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3384 byte_order
= gdbarch_byte_order (gdbarch
);
3386 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
),
3389 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3390 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3391 read_target_long_array (cache_ovly_table_base
,
3392 (unsigned int *) cache_ovly_table
,
3393 cache_novlys
* 4, word_size
, byte_order
);
3395 return 1; /* SUCCESS */
3398 /* Function: simple_overlay_update_1
3399 A helper function for simple_overlay_update. Assuming a cached copy
3400 of _ovly_table exists, look through it to find an entry whose vma,
3401 lma and size match those of OSECT. Re-read the entry and make sure
3402 it still matches OSECT (else the table may no longer be valid).
3403 Set OSECT's mapped state to match the entry. Return: 1 for
3404 success, 0 for failure. */
3407 simple_overlay_update_1 (struct obj_section
*osect
)
3410 bfd
*obfd
= osect
->objfile
->obfd
;
3411 asection
*bsect
= osect
->the_bfd_section
;
3412 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3413 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3414 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3416 size
= bfd_get_section_size (osect
->the_bfd_section
);
3417 for (i
= 0; i
< cache_novlys
; i
++)
3418 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3419 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3420 /* && cache_ovly_table[i][SIZE] == size */ )
3422 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3423 (unsigned int *) cache_ovly_table
[i
],
3424 4, word_size
, byte_order
);
3425 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3426 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3427 /* && cache_ovly_table[i][SIZE] == size */ )
3429 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3432 else /* Warning! Warning! Target's ovly table has changed! */
3438 /* Function: simple_overlay_update
3439 If OSECT is NULL, then update all sections' mapped state
3440 (after re-reading the entire target _ovly_table).
3441 If OSECT is non-NULL, then try to find a matching entry in the
3442 cached ovly_table and update only OSECT's mapped state.
3443 If a cached entry can't be found or the cache isn't valid, then
3444 re-read the entire cache, and go ahead and update all sections. */
3447 simple_overlay_update (struct obj_section
*osect
)
3449 struct objfile
*objfile
;
3451 /* Were we given an osect to look up? NULL means do all of them. */
3453 /* Have we got a cached copy of the target's overlay table? */
3454 if (cache_ovly_table
!= NULL
)
3456 /* Does its cached location match what's currently in the
3458 struct minimal_symbol
*minsym
3459 = lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3462 error (_("Error reading inferior's overlay table: couldn't "
3463 "find `_ovly_table' array\n"
3464 "in inferior. Use `overlay manual' mode."));
3466 if (cache_ovly_table_base
== SYMBOL_VALUE_ADDRESS (minsym
))
3467 /* Then go ahead and try to look up this single section in
3469 if (simple_overlay_update_1 (osect
))
3470 /* Found it! We're done. */
3474 /* Cached table no good: need to read the entire table anew.
3475 Or else we want all the sections, in which case it's actually
3476 more efficient to read the whole table in one block anyway. */
3478 if (! simple_read_overlay_table ())
3481 /* Now may as well update all sections, even if only one was requested. */
3482 ALL_OBJSECTIONS (objfile
, osect
)
3483 if (section_is_overlay (osect
))
3486 bfd
*obfd
= osect
->objfile
->obfd
;
3487 asection
*bsect
= osect
->the_bfd_section
;
3489 size
= bfd_get_section_size (bsect
);
3490 for (i
= 0; i
< cache_novlys
; i
++)
3491 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3492 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3493 /* && cache_ovly_table[i][SIZE] == size */ )
3494 { /* obj_section matches i'th entry in ovly_table. */
3495 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3496 break; /* finished with inner for loop: break out. */
3501 /* Set the output sections and output offsets for section SECTP in
3502 ABFD. The relocation code in BFD will read these offsets, so we
3503 need to be sure they're initialized. We map each section to itself,
3504 with no offset; this means that SECTP->vma will be honored. */
3507 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3509 sectp
->output_section
= sectp
;
3510 sectp
->output_offset
= 0;
3513 /* Default implementation for sym_relocate. */
3517 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3520 bfd
*abfd
= objfile
->obfd
;
3522 /* We're only interested in sections with relocation
3524 if ((sectp
->flags
& SEC_RELOC
) == 0)
3527 /* We will handle section offsets properly elsewhere, so relocate as if
3528 all sections begin at 0. */
3529 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3531 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3534 /* Relocate the contents of a debug section SECTP in ABFD. The
3535 contents are stored in BUF if it is non-NULL, or returned in a
3536 malloc'd buffer otherwise.
3538 For some platforms and debug info formats, shared libraries contain
3539 relocations against the debug sections (particularly for DWARF-2;
3540 one affected platform is PowerPC GNU/Linux, although it depends on
3541 the version of the linker in use). Also, ELF object files naturally
3542 have unresolved relocations for their debug sections. We need to apply
3543 the relocations in order to get the locations of symbols correct.
3544 Another example that may require relocation processing, is the
3545 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3549 symfile_relocate_debug_section (struct objfile
*objfile
,
3550 asection
*sectp
, bfd_byte
*buf
)
3552 gdb_assert (objfile
->sf
->sym_relocate
);
3554 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3557 struct symfile_segment_data
*
3558 get_symfile_segment_data (bfd
*abfd
)
3560 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3565 return sf
->sym_segments (abfd
);
3569 free_symfile_segment_data (struct symfile_segment_data
*data
)
3571 xfree (data
->segment_bases
);
3572 xfree (data
->segment_sizes
);
3573 xfree (data
->segment_info
);
3579 - DATA, containing segment addresses from the object file ABFD, and
3580 the mapping from ABFD's sections onto the segments that own them,
3582 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3583 segment addresses reported by the target,
3584 store the appropriate offsets for each section in OFFSETS.
3586 If there are fewer entries in SEGMENT_BASES than there are segments
3587 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3589 If there are more entries, then ignore the extra. The target may
3590 not be able to distinguish between an empty data segment and a
3591 missing data segment; a missing text segment is less plausible. */
3593 symfile_map_offsets_to_segments (bfd
*abfd
, struct symfile_segment_data
*data
,
3594 struct section_offsets
*offsets
,
3595 int num_segment_bases
,
3596 const CORE_ADDR
*segment_bases
)
3601 /* It doesn't make sense to call this function unless you have some
3602 segment base addresses. */
3603 gdb_assert (num_segment_bases
> 0);
3605 /* If we do not have segment mappings for the object file, we
3606 can not relocate it by segments. */
3607 gdb_assert (data
!= NULL
);
3608 gdb_assert (data
->num_segments
> 0);
3610 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3612 int which
= data
->segment_info
[i
];
3614 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
3616 /* Don't bother computing offsets for sections that aren't
3617 loaded as part of any segment. */
3621 /* Use the last SEGMENT_BASES entry as the address of any extra
3622 segments mentioned in DATA->segment_info. */
3623 if (which
> num_segment_bases
)
3624 which
= num_segment_bases
;
3626 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
3627 - data
->segment_bases
[which
- 1]);
3634 symfile_find_segment_sections (struct objfile
*objfile
)
3636 bfd
*abfd
= objfile
->obfd
;
3639 struct symfile_segment_data
*data
;
3641 data
= get_symfile_segment_data (objfile
->obfd
);
3645 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
3647 free_symfile_segment_data (data
);
3651 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3653 int which
= data
->segment_info
[i
];
3657 if (objfile
->sect_index_text
== -1)
3658 objfile
->sect_index_text
= sect
->index
;
3660 if (objfile
->sect_index_rodata
== -1)
3661 objfile
->sect_index_rodata
= sect
->index
;
3663 else if (which
== 2)
3665 if (objfile
->sect_index_data
== -1)
3666 objfile
->sect_index_data
= sect
->index
;
3668 if (objfile
->sect_index_bss
== -1)
3669 objfile
->sect_index_bss
= sect
->index
;
3673 free_symfile_segment_data (data
);
3677 _initialize_symfile (void)
3679 struct cmd_list_element
*c
;
3681 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3682 Load symbol table from executable file FILE.\n\
3683 The `file' command can also load symbol tables, as well as setting the file\n\
3684 to execute."), &cmdlist
);
3685 set_cmd_completer (c
, filename_completer
);
3687 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3688 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3689 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR>\
3690 ...]\nADDR is the starting address of the file's text.\n\
3691 The optional arguments are section-name section-address pairs and\n\
3692 should be specified if the data and bss segments are not contiguous\n\
3693 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3695 set_cmd_completer (c
, filename_completer
);
3697 c
= add_cmd ("load", class_files
, load_command
, _("\
3698 Dynamically load FILE into the running program, and record its symbols\n\
3699 for access from GDB.\n\
3700 A load OFFSET may also be given."), &cmdlist
);
3701 set_cmd_completer (c
, filename_completer
);
3703 add_setshow_boolean_cmd ("symbol-reloading", class_support
,
3704 &symbol_reloading
, _("\
3705 Set dynamic symbol table reloading multiple times in one run."), _("\
3706 Show dynamic symbol table reloading multiple times in one run."), NULL
,
3708 show_symbol_reloading
,
3709 &setlist
, &showlist
);
3711 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3712 _("Commands for debugging overlays."), &overlaylist
,
3713 "overlay ", 0, &cmdlist
);
3715 add_com_alias ("ovly", "overlay", class_alias
, 1);
3716 add_com_alias ("ov", "overlay", class_alias
, 1);
3718 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3719 _("Assert that an overlay section is mapped."), &overlaylist
);
3721 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3722 _("Assert that an overlay section is unmapped."), &overlaylist
);
3724 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3725 _("List mappings of overlay sections."), &overlaylist
);
3727 add_cmd ("manual", class_support
, overlay_manual_command
,
3728 _("Enable overlay debugging."), &overlaylist
);
3729 add_cmd ("off", class_support
, overlay_off_command
,
3730 _("Disable overlay debugging."), &overlaylist
);
3731 add_cmd ("auto", class_support
, overlay_auto_command
,
3732 _("Enable automatic overlay debugging."), &overlaylist
);
3733 add_cmd ("load-target", class_support
, overlay_load_command
,
3734 _("Read the overlay mapping state from the target."), &overlaylist
);
3736 /* Filename extension to source language lookup table: */
3737 init_filename_language_table ();
3738 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3740 Set mapping between filename extension and source language."), _("\
3741 Show mapping between filename extension and source language."), _("\
3742 Usage: set extension-language .foo bar"),
3743 set_ext_lang_command
,
3745 &setlist
, &showlist
);
3747 add_info ("extensions", info_ext_lang_command
,
3748 _("All filename extensions associated with a source language."));
3750 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3751 &debug_file_directory
, _("\
3752 Set the directories where separate debug symbols are searched for."), _("\
3753 Show the directories where separate debug symbols are searched for."), _("\
3754 Separate debug symbols are first searched for in the same\n\
3755 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3756 and lastly at the path of the directory of the binary with\n\
3757 each global debug-file-directory component prepended."),
3759 show_debug_file_directory
,
3760 &setlist
, &showlist
);