1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
5 Free Software Foundation, Inc.
7 Contributed by Cygnus Support, using pieces from other GDB modules.
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>. */
25 #include "arch-utils.h"
37 #include "breakpoint.h"
39 #include "complaints.h"
43 #include "filenames.h" /* for DOSish file names */
44 #include "gdb-stabs.h"
45 #include "gdb_obstack.h"
46 #include "completer.h"
49 #include "readline/readline.h"
50 #include "gdb_assert.h"
54 #include "parser-defs.h"
60 #include <sys/types.h>
62 #include "gdb_string.h"
70 int (*deprecated_ui_load_progress_hook
) (const char *section
, unsigned long num
);
71 void (*deprecated_show_load_progress
) (const char *section
,
72 unsigned long section_sent
,
73 unsigned long section_size
,
74 unsigned long total_sent
,
75 unsigned long total_size
);
76 void (*deprecated_pre_add_symbol_hook
) (const char *);
77 void (*deprecated_post_add_symbol_hook
) (void);
79 static void clear_symtab_users_cleanup (void *ignore
);
81 /* Global variables owned by this file */
82 int readnow_symbol_files
; /* Read full symbols immediately */
84 /* External variables and functions referenced. */
86 extern void report_transfer_performance (unsigned long, time_t, time_t);
88 /* Functions this file defines */
91 static int simple_read_overlay_region_table (void);
92 static void simple_free_overlay_region_table (void);
95 static void load_command (char *, int);
97 static void symbol_file_add_main_1 (char *args
, int from_tty
, int flags
);
99 static void add_symbol_file_command (char *, int);
101 bfd
*symfile_bfd_open (char *);
103 int get_section_index (struct objfile
*, char *);
105 static struct sym_fns
*find_sym_fns (bfd
*);
107 static void decrement_reading_symtab (void *);
109 static void overlay_invalidate_all (void);
111 void list_overlays_command (char *, int);
113 void map_overlay_command (char *, int);
115 void unmap_overlay_command (char *, int);
117 static void overlay_auto_command (char *, int);
119 static void overlay_manual_command (char *, int);
121 static void overlay_off_command (char *, int);
123 static void overlay_load_command (char *, int);
125 static void overlay_command (char *, int);
127 static void simple_free_overlay_table (void);
129 static void read_target_long_array (CORE_ADDR
, unsigned int *, int, int,
132 static int simple_read_overlay_table (void);
134 static int simple_overlay_update_1 (struct obj_section
*);
136 static void add_filename_language (char *ext
, enum language lang
);
138 static void info_ext_lang_command (char *args
, int from_tty
);
140 static void init_filename_language_table (void);
142 static void symfile_find_segment_sections (struct objfile
*objfile
);
144 void _initialize_symfile (void);
146 /* List of all available sym_fns. On gdb startup, each object file reader
147 calls add_symtab_fns() to register information on each format it is
150 static struct sym_fns
*symtab_fns
= NULL
;
152 /* Flag for whether user will be reloading symbols multiple times.
153 Defaults to ON for VxWorks, otherwise OFF. */
155 #ifdef SYMBOL_RELOADING_DEFAULT
156 int symbol_reloading
= SYMBOL_RELOADING_DEFAULT
;
158 int symbol_reloading
= 0;
161 show_symbol_reloading (struct ui_file
*file
, int from_tty
,
162 struct cmd_list_element
*c
, const char *value
)
164 fprintf_filtered (file
, _("\
165 Dynamic symbol table reloading multiple times in one run is %s.\n"),
169 /* If non-zero, shared library symbols will be added automatically
170 when the inferior is created, new libraries are loaded, or when
171 attaching to the inferior. This is almost always what users will
172 want to have happen; but for very large programs, the startup time
173 will be excessive, and so if this is a problem, the user can clear
174 this flag and then add the shared library symbols as needed. Note
175 that there is a potential for confusion, since if the shared
176 library symbols are not loaded, commands like "info fun" will *not*
177 report all the functions that are actually present. */
179 int auto_solib_add
= 1;
181 /* For systems that support it, a threshold size in megabytes. If
182 automatically adding a new library's symbol table to those already
183 known to the debugger would cause the total shared library symbol
184 size to exceed this threshhold, then the shlib's symbols are not
185 added. The threshold is ignored if the user explicitly asks for a
186 shlib to be added, such as when using the "sharedlibrary"
189 int auto_solib_limit
;
192 /* Make a null terminated copy of the string at PTR with SIZE characters in
193 the obstack pointed to by OBSTACKP . Returns the address of the copy.
194 Note that the string at PTR does not have to be null terminated, I.E. it
195 may be part of a larger string and we are only saving a substring. */
198 obsavestring (const char *ptr
, int size
, struct obstack
*obstackp
)
200 char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
201 /* Open-coded memcpy--saves function call time. These strings are usually
202 short. FIXME: Is this really still true with a compiler that can
205 const char *p1
= ptr
;
207 const char *end
= ptr
+ size
;
216 /* Concatenate NULL terminated variable argument list of `const char *' strings;
217 return the new string. Space is found in the OBSTACKP. Argument list must
218 be terminated by a sentinel expression `(char *) NULL'. */
221 obconcat (struct obstack
*obstackp
, ...)
225 va_start (ap
, obstackp
);
228 const char *s
= va_arg (ap
, const char *);
233 obstack_grow_str (obstackp
, s
);
236 obstack_1grow (obstackp
, 0);
238 return obstack_finish (obstackp
);
241 /* True if we are reading a symbol table. */
243 int currently_reading_symtab
= 0;
246 decrement_reading_symtab (void *dummy
)
248 currently_reading_symtab
--;
251 /* Increment currently_reading_symtab and return a cleanup that can be
252 used to decrement it. */
254 increment_reading_symtab (void)
256 ++currently_reading_symtab
;
257 return make_cleanup (decrement_reading_symtab
, NULL
);
260 /* Remember the lowest-addressed loadable section we've seen.
261 This function is called via bfd_map_over_sections.
263 In case of equal vmas, the section with the largest size becomes the
264 lowest-addressed loadable section.
266 If the vmas and sizes are equal, the last section is considered the
267 lowest-addressed loadable section. */
270 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
272 asection
**lowest
= (asection
**) obj
;
274 if (0 == (bfd_get_section_flags (abfd
, sect
) & (SEC_ALLOC
| SEC_LOAD
)))
277 *lowest
= sect
; /* First loadable section */
278 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
279 *lowest
= sect
; /* A lower loadable section */
280 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
281 && (bfd_section_size (abfd
, (*lowest
))
282 <= bfd_section_size (abfd
, sect
)))
286 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
288 struct section_addr_info
*
289 alloc_section_addr_info (size_t num_sections
)
291 struct section_addr_info
*sap
;
294 size
= (sizeof (struct section_addr_info
)
295 + sizeof (struct other_sections
) * (num_sections
- 1));
296 sap
= (struct section_addr_info
*) xmalloc (size
);
297 memset (sap
, 0, size
);
298 sap
->num_sections
= num_sections
;
303 /* Build (allocate and populate) a section_addr_info struct from
304 an existing section table. */
306 extern struct section_addr_info
*
307 build_section_addr_info_from_section_table (const struct target_section
*start
,
308 const struct target_section
*end
)
310 struct section_addr_info
*sap
;
311 const struct target_section
*stp
;
314 sap
= alloc_section_addr_info (end
- start
);
316 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
318 if (bfd_get_section_flags (stp
->bfd
,
319 stp
->the_bfd_section
) & (SEC_ALLOC
| SEC_LOAD
)
320 && oidx
< end
- start
)
322 sap
->other
[oidx
].addr
= stp
->addr
;
323 sap
->other
[oidx
].name
324 = xstrdup (bfd_section_name (stp
->bfd
, stp
->the_bfd_section
));
325 sap
->other
[oidx
].sectindex
= stp
->the_bfd_section
->index
;
333 /* Create a section_addr_info from section offsets in ABFD. */
335 static struct section_addr_info
*
336 build_section_addr_info_from_bfd (bfd
*abfd
)
338 struct section_addr_info
*sap
;
340 struct bfd_section
*sec
;
342 sap
= alloc_section_addr_info (bfd_count_sections (abfd
));
343 for (i
= 0, sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
344 if (bfd_get_section_flags (abfd
, sec
) & (SEC_ALLOC
| SEC_LOAD
))
346 sap
->other
[i
].addr
= bfd_get_section_vma (abfd
, sec
);
347 sap
->other
[i
].name
= xstrdup (bfd_get_section_name (abfd
, sec
));
348 sap
->other
[i
].sectindex
= sec
->index
;
354 /* Create a section_addr_info from section offsets in OBJFILE. */
356 struct section_addr_info
*
357 build_section_addr_info_from_objfile (const struct objfile
*objfile
)
359 struct section_addr_info
*sap
;
362 /* Before reread_symbols gets rewritten it is not safe to call:
363 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
365 sap
= build_section_addr_info_from_bfd (objfile
->obfd
);
366 for (i
= 0; i
< sap
->num_sections
&& sap
->other
[i
].name
; i
++)
368 int sectindex
= sap
->other
[i
].sectindex
;
370 sap
->other
[i
].addr
+= objfile
->section_offsets
->offsets
[sectindex
];
375 /* Free all memory allocated by build_section_addr_info_from_section_table. */
378 free_section_addr_info (struct section_addr_info
*sap
)
382 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
383 if (sap
->other
[idx
].name
)
384 xfree (sap
->other
[idx
].name
);
389 /* Initialize OBJFILE's sect_index_* members. */
391 init_objfile_sect_indices (struct objfile
*objfile
)
396 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
398 objfile
->sect_index_text
= sect
->index
;
400 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
402 objfile
->sect_index_data
= sect
->index
;
404 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
406 objfile
->sect_index_bss
= sect
->index
;
408 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
410 objfile
->sect_index_rodata
= sect
->index
;
412 /* This is where things get really weird... We MUST have valid
413 indices for the various sect_index_* members or gdb will abort.
414 So if for example, there is no ".text" section, we have to
415 accomodate that. First, check for a file with the standard
416 one or two segments. */
418 symfile_find_segment_sections (objfile
);
420 /* Except when explicitly adding symbol files at some address,
421 section_offsets contains nothing but zeros, so it doesn't matter
422 which slot in section_offsets the individual sect_index_* members
423 index into. So if they are all zero, it is safe to just point
424 all the currently uninitialized indices to the first slot. But
425 beware: if this is the main executable, it may be relocated
426 later, e.g. by the remote qOffsets packet, and then this will
427 be wrong! That's why we try segments first. */
429 for (i
= 0; i
< objfile
->num_sections
; i
++)
431 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
436 if (i
== objfile
->num_sections
)
438 if (objfile
->sect_index_text
== -1)
439 objfile
->sect_index_text
= 0;
440 if (objfile
->sect_index_data
== -1)
441 objfile
->sect_index_data
= 0;
442 if (objfile
->sect_index_bss
== -1)
443 objfile
->sect_index_bss
= 0;
444 if (objfile
->sect_index_rodata
== -1)
445 objfile
->sect_index_rodata
= 0;
449 /* The arguments to place_section. */
451 struct place_section_arg
453 struct section_offsets
*offsets
;
457 /* Find a unique offset to use for loadable section SECT if
458 the user did not provide an offset. */
461 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
463 struct place_section_arg
*arg
= obj
;
464 CORE_ADDR
*offsets
= arg
->offsets
->offsets
, start_addr
;
466 ULONGEST align
= ((ULONGEST
) 1) << bfd_get_section_alignment (abfd
, sect
);
468 /* We are only interested in allocated sections. */
469 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
472 /* If the user specified an offset, honor it. */
473 if (offsets
[sect
->index
] != 0)
476 /* Otherwise, let's try to find a place for the section. */
477 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
484 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
486 int indx
= cur_sec
->index
;
488 /* We don't need to compare against ourself. */
492 /* We can only conflict with allocated sections. */
493 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
496 /* If the section offset is 0, either the section has not been placed
497 yet, or it was the lowest section placed (in which case LOWEST
498 will be past its end). */
499 if (offsets
[indx
] == 0)
502 /* If this section would overlap us, then we must move up. */
503 if (start_addr
+ bfd_get_section_size (sect
) > offsets
[indx
]
504 && start_addr
< offsets
[indx
] + bfd_get_section_size (cur_sec
))
506 start_addr
= offsets
[indx
] + bfd_get_section_size (cur_sec
);
507 start_addr
= (start_addr
+ align
- 1) & -align
;
512 /* Otherwise, we appear to be OK. So far. */
517 offsets
[sect
->index
] = start_addr
;
518 arg
->lowest
= start_addr
+ bfd_get_section_size (sect
);
521 /* Store struct section_addr_info as prepared (made relative and with SECTINDEX
522 filled-in) by addr_info_make_relative into SECTION_OFFSETS of NUM_SECTIONS
526 relative_addr_info_to_section_offsets (struct section_offsets
*section_offsets
,
528 struct section_addr_info
*addrs
)
532 memset (section_offsets
, 0, SIZEOF_N_SECTION_OFFSETS (num_sections
));
534 /* Now calculate offsets for section that were specified by the caller. */
535 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
537 struct other_sections
*osp
;
539 osp
= &addrs
->other
[i
];
543 /* Record all sections in offsets */
544 /* The section_offsets in the objfile are here filled in using
546 section_offsets
->offsets
[osp
->sectindex
] = osp
->addr
;
550 /* Transform section name S for a name comparison. prelink can split section
551 `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly
552 prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address
553 of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss'
554 (`.sbss') section has invalid (increased) virtual address. */
557 addr_section_name (const char *s
)
559 if (strcmp (s
, ".dynbss") == 0)
561 if (strcmp (s
, ".sdynbss") == 0)
567 /* qsort comparator for addrs_section_sort. Sort entries in ascending order by
568 their (name, sectindex) pair. sectindex makes the sort by name stable. */
571 addrs_section_compar (const void *ap
, const void *bp
)
573 const struct other_sections
*a
= *((struct other_sections
**) ap
);
574 const struct other_sections
*b
= *((struct other_sections
**) bp
);
575 int retval
, a_idx
, b_idx
;
577 retval
= strcmp (addr_section_name (a
->name
), addr_section_name (b
->name
));
581 /* SECTINDEX is undefined iff ADDR is zero. */
582 a_idx
= a
->addr
== 0 ? 0 : a
->sectindex
;
583 b_idx
= b
->addr
== 0 ? 0 : b
->sectindex
;
584 return a_idx
- b_idx
;
587 /* Provide sorted array of pointers to sections of ADDRS. The array is
588 terminated by NULL. Caller is responsible to call xfree for it. */
590 static struct other_sections
**
591 addrs_section_sort (struct section_addr_info
*addrs
)
593 struct other_sections
**array
;
596 /* `+ 1' for the NULL terminator. */
597 array
= xmalloc (sizeof (*array
) * (addrs
->num_sections
+ 1));
598 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
599 array
[i
] = &addrs
->other
[i
];
602 qsort (array
, i
, sizeof (*array
), addrs_section_compar
);
607 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
608 also SECTINDEXes specific to ABFD there. This function can be used to
609 rebase ADDRS to start referencing different BFD than before. */
612 addr_info_make_relative (struct section_addr_info
*addrs
, bfd
*abfd
)
614 asection
*lower_sect
;
615 CORE_ADDR lower_offset
;
617 struct cleanup
*my_cleanup
;
618 struct section_addr_info
*abfd_addrs
;
619 struct other_sections
**addrs_sorted
, **abfd_addrs_sorted
;
620 struct other_sections
**addrs_to_abfd_addrs
;
622 /* Find lowest loadable section to be used as starting point for
623 continguous sections. */
625 bfd_map_over_sections (abfd
, find_lowest_section
, &lower_sect
);
626 if (lower_sect
== NULL
)
628 warning (_("no loadable sections found in added symbol-file %s"),
629 bfd_get_filename (abfd
));
633 lower_offset
= bfd_section_vma (bfd_get_filename (abfd
), lower_sect
);
635 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
636 in ABFD. Section names are not unique - there can be multiple sections of
637 the same name. Also the sections of the same name do not have to be
638 adjacent to each other. Some sections may be present only in one of the
639 files. Even sections present in both files do not have to be in the same
642 Use stable sort by name for the sections in both files. Then linearly
643 scan both lists matching as most of the entries as possible. */
645 addrs_sorted
= addrs_section_sort (addrs
);
646 my_cleanup
= make_cleanup (xfree
, addrs_sorted
);
648 abfd_addrs
= build_section_addr_info_from_bfd (abfd
);
649 make_cleanup_free_section_addr_info (abfd_addrs
);
650 abfd_addrs_sorted
= addrs_section_sort (abfd_addrs
);
651 make_cleanup (xfree
, abfd_addrs_sorted
);
653 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and ABFD_ADDRS_SORTED. */
655 addrs_to_abfd_addrs
= xzalloc (sizeof (*addrs_to_abfd_addrs
)
656 * addrs
->num_sections
);
657 make_cleanup (xfree
, addrs_to_abfd_addrs
);
659 while (*addrs_sorted
)
661 const char *sect_name
= addr_section_name ((*addrs_sorted
)->name
);
663 while (*abfd_addrs_sorted
664 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
668 if (*abfd_addrs_sorted
669 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
674 /* Make the found item directly addressable from ADDRS. */
675 index_in_addrs
= *addrs_sorted
- addrs
->other
;
676 gdb_assert (addrs_to_abfd_addrs
[index_in_addrs
] == NULL
);
677 addrs_to_abfd_addrs
[index_in_addrs
] = *abfd_addrs_sorted
;
679 /* Never use the same ABFD entry twice. */
686 /* Calculate offsets for the loadable sections.
687 FIXME! Sections must be in order of increasing loadable section
688 so that contiguous sections can use the lower-offset!!!
690 Adjust offsets if the segments are not contiguous.
691 If the section is contiguous, its offset should be set to
692 the offset of the highest loadable section lower than it
693 (the loadable section directly below it in memory).
694 this_offset = lower_offset = lower_addr - lower_orig_addr */
696 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
698 struct other_sections
*sect
= addrs_to_abfd_addrs
[i
];
702 /* This is the index used by BFD. */
703 addrs
->other
[i
].sectindex
= sect
->sectindex
;
705 if (addrs
->other
[i
].addr
!= 0)
707 addrs
->other
[i
].addr
-= sect
->addr
;
708 lower_offset
= addrs
->other
[i
].addr
;
711 addrs
->other
[i
].addr
= lower_offset
;
715 /* addr_section_name transformation is not used for SECT_NAME. */
716 const char *sect_name
= addrs
->other
[i
].name
;
718 /* This section does not exist in ABFD, which is normally
719 unexpected and we want to issue a warning.
721 However, the ELF prelinker does create a few sections which are
722 marked in the main executable as loadable (they are loaded in
723 memory from the DYNAMIC segment) and yet are not present in
724 separate debug info files. This is fine, and should not cause
725 a warning. Shared libraries contain just the section
726 ".gnu.liblist" but it is not marked as loadable there. There is
727 no other way to identify them than by their name as the sections
728 created by prelink have no special flags.
730 For the sections `.bss' and `.sbss' see addr_section_name. */
732 if (!(strcmp (sect_name
, ".gnu.liblist") == 0
733 || strcmp (sect_name
, ".gnu.conflict") == 0
734 || (strcmp (sect_name
, ".bss") == 0
736 && strcmp (addrs
->other
[i
- 1].name
, ".dynbss") == 0
737 && addrs_to_abfd_addrs
[i
- 1] != NULL
)
738 || (strcmp (sect_name
, ".sbss") == 0
740 && strcmp (addrs
->other
[i
- 1].name
, ".sdynbss") == 0
741 && addrs_to_abfd_addrs
[i
- 1] != NULL
)))
742 warning (_("section %s not found in %s"), sect_name
,
743 bfd_get_filename (abfd
));
745 addrs
->other
[i
].addr
= 0;
747 /* SECTINDEX is invalid if ADDR is zero. */
751 do_cleanups (my_cleanup
);
754 /* Parse the user's idea of an offset for dynamic linking, into our idea
755 of how to represent it for fast symbol reading. This is the default
756 version of the sym_fns.sym_offsets function for symbol readers that
757 don't need to do anything special. It allocates a section_offsets table
758 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
761 default_symfile_offsets (struct objfile
*objfile
,
762 struct section_addr_info
*addrs
)
764 objfile
->num_sections
= bfd_count_sections (objfile
->obfd
);
765 objfile
->section_offsets
= (struct section_offsets
*)
766 obstack_alloc (&objfile
->objfile_obstack
,
767 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
768 relative_addr_info_to_section_offsets (objfile
->section_offsets
,
769 objfile
->num_sections
, addrs
);
771 /* For relocatable files, all loadable sections will start at zero.
772 The zero is meaningless, so try to pick arbitrary addresses such
773 that no loadable sections overlap. This algorithm is quadratic,
774 but the number of sections in a single object file is generally
776 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
778 struct place_section_arg arg
;
779 bfd
*abfd
= objfile
->obfd
;
782 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
783 /* We do not expect this to happen; just skip this step if the
784 relocatable file has a section with an assigned VMA. */
785 if (bfd_section_vma (abfd
, cur_sec
) != 0)
790 CORE_ADDR
*offsets
= objfile
->section_offsets
->offsets
;
792 /* Pick non-overlapping offsets for sections the user did not
794 arg
.offsets
= objfile
->section_offsets
;
796 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
798 /* Correctly filling in the section offsets is not quite
799 enough. Relocatable files have two properties that
800 (most) shared objects do not:
802 - Their debug information will contain relocations. Some
803 shared libraries do also, but many do not, so this can not
806 - If there are multiple code sections they will be loaded
807 at different relative addresses in memory than they are
808 in the objfile, since all sections in the file will start
811 Because GDB has very limited ability to map from an
812 address in debug info to the correct code section,
813 it relies on adding SECT_OFF_TEXT to things which might be
814 code. If we clear all the section offsets, and set the
815 section VMAs instead, then symfile_relocate_debug_section
816 will return meaningful debug information pointing at the
819 GDB has too many different data structures for section
820 addresses - a bfd, objfile, and so_list all have section
821 tables, as does exec_ops. Some of these could probably
824 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
825 cur_sec
= cur_sec
->next
)
827 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
830 bfd_set_section_vma (abfd
, cur_sec
, offsets
[cur_sec
->index
]);
831 exec_set_section_address (bfd_get_filename (abfd
), cur_sec
->index
,
832 offsets
[cur_sec
->index
]);
833 offsets
[cur_sec
->index
] = 0;
838 /* Remember the bfd indexes for the .text, .data, .bss and
840 init_objfile_sect_indices (objfile
);
844 /* Divide the file into segments, which are individual relocatable units.
845 This is the default version of the sym_fns.sym_segments function for
846 symbol readers that do not have an explicit representation of segments.
847 It assumes that object files do not have segments, and fully linked
848 files have a single segment. */
850 struct symfile_segment_data
*
851 default_symfile_segments (bfd
*abfd
)
855 struct symfile_segment_data
*data
;
858 /* Relocatable files contain enough information to position each
859 loadable section independently; they should not be relocated
861 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
864 /* Make sure there is at least one loadable section in the file. */
865 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
867 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
875 low
= bfd_get_section_vma (abfd
, sect
);
876 high
= low
+ bfd_get_section_size (sect
);
878 data
= XZALLOC (struct symfile_segment_data
);
879 data
->num_segments
= 1;
880 data
->segment_bases
= XCALLOC (1, CORE_ADDR
);
881 data
->segment_sizes
= XCALLOC (1, CORE_ADDR
);
883 num_sections
= bfd_count_sections (abfd
);
884 data
->segment_info
= XCALLOC (num_sections
, int);
886 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
890 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
893 vma
= bfd_get_section_vma (abfd
, sect
);
896 if (vma
+ bfd_get_section_size (sect
) > high
)
897 high
= vma
+ bfd_get_section_size (sect
);
899 data
->segment_info
[i
] = 1;
902 data
->segment_bases
[0] = low
;
903 data
->segment_sizes
[0] = high
- low
;
908 /* Process a symbol file, as either the main file or as a dynamically
911 OBJFILE is where the symbols are to be read from.
913 ADDRS is the list of section load addresses. If the user has given
914 an 'add-symbol-file' command, then this is the list of offsets and
915 addresses he or she provided as arguments to the command; or, if
916 we're handling a shared library, these are the actual addresses the
917 sections are loaded at, according to the inferior's dynamic linker
918 (as gleaned by GDB's shared library code). We convert each address
919 into an offset from the section VMA's as it appears in the object
920 file, and then call the file's sym_offsets function to convert this
921 into a format-specific offset table --- a `struct section_offsets'.
922 If ADDRS is non-zero, OFFSETS must be zero.
924 OFFSETS is a table of section offsets already in the right
925 format-specific representation. NUM_OFFSETS is the number of
926 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
927 assume this is the proper table the call to sym_offsets described
928 above would produce. Instead of calling sym_offsets, we just dump
929 it right into objfile->section_offsets. (When we're re-reading
930 symbols from an objfile, we don't have the original load address
931 list any more; all we have is the section offset table.) If
932 OFFSETS is non-zero, ADDRS must be zero.
934 ADD_FLAGS encodes verbosity level, whether this is main symbol or
935 an extra symbol file such as dynamically loaded code, and wether
936 breakpoint reset should be deferred. */
939 syms_from_objfile (struct objfile
*objfile
,
940 struct section_addr_info
*addrs
,
941 struct section_offsets
*offsets
,
945 struct section_addr_info
*local_addr
= NULL
;
946 struct cleanup
*old_chain
;
947 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
949 gdb_assert (! (addrs
&& offsets
));
951 init_entry_point_info (objfile
);
952 objfile
->sf
= find_sym_fns (objfile
->obfd
);
954 if (objfile
->sf
== NULL
)
955 return; /* No symbols. */
957 /* Make sure that partially constructed symbol tables will be cleaned up
958 if an error occurs during symbol reading. */
959 old_chain
= make_cleanup_free_objfile (objfile
);
961 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
962 list. We now establish the convention that an addr of zero means
963 no load address was specified. */
964 if (! addrs
&& ! offsets
)
967 = alloc_section_addr_info (bfd_count_sections (objfile
->obfd
));
968 make_cleanup (xfree
, local_addr
);
972 /* Now either addrs or offsets is non-zero. */
976 /* We will modify the main symbol table, make sure that all its users
977 will be cleaned up if an error occurs during symbol reading. */
978 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
980 /* Since no error yet, throw away the old symbol table. */
982 if (symfile_objfile
!= NULL
)
984 free_objfile (symfile_objfile
);
985 gdb_assert (symfile_objfile
== NULL
);
988 /* Currently we keep symbols from the add-symbol-file command.
989 If the user wants to get rid of them, they should do "symbol-file"
990 without arguments first. Not sure this is the best behavior
993 (*objfile
->sf
->sym_new_init
) (objfile
);
996 /* Convert addr into an offset rather than an absolute address.
997 We find the lowest address of a loaded segment in the objfile,
998 and assume that <addr> is where that got loaded.
1000 We no longer warn if the lowest section is not a text segment (as
1001 happens for the PA64 port. */
1002 if (addrs
&& addrs
->other
[0].name
)
1003 addr_info_make_relative (addrs
, objfile
->obfd
);
1005 /* Initialize symbol reading routines for this objfile, allow complaints to
1006 appear for this new file, and record how verbose to be, then do the
1007 initial symbol reading for this file. */
1009 (*objfile
->sf
->sym_init
) (objfile
);
1010 clear_complaints (&symfile_complaints
, 1, add_flags
& SYMFILE_VERBOSE
);
1013 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
1016 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_offsets
);
1018 /* Just copy in the offset table directly as given to us. */
1019 objfile
->num_sections
= num_offsets
;
1020 objfile
->section_offsets
1021 = ((struct section_offsets
*)
1022 obstack_alloc (&objfile
->objfile_obstack
, size
));
1023 memcpy (objfile
->section_offsets
, offsets
, size
);
1025 init_objfile_sect_indices (objfile
);
1028 (*objfile
->sf
->sym_read
) (objfile
, add_flags
);
1030 /* Discard cleanups as symbol reading was successful. */
1032 discard_cleanups (old_chain
);
1036 /* Perform required actions after either reading in the initial
1037 symbols for a new objfile, or mapping in the symbols from a reusable
1041 new_symfile_objfile (struct objfile
*objfile
, int add_flags
)
1043 /* If this is the main symbol file we have to clean up all users of the
1044 old main symbol file. Otherwise it is sufficient to fixup all the
1045 breakpoints that may have been redefined by this symbol file. */
1046 if (add_flags
& SYMFILE_MAINLINE
)
1048 /* OK, make it the "real" symbol file. */
1049 symfile_objfile
= objfile
;
1051 clear_symtab_users ();
1053 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
1055 breakpoint_re_set ();
1058 /* We're done reading the symbol file; finish off complaints. */
1059 clear_complaints (&symfile_complaints
, 0, add_flags
& SYMFILE_VERBOSE
);
1062 /* Process a symbol file, as either the main file or as a dynamically
1065 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1066 This BFD will be closed on error, and is always consumed by this function.
1068 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1069 extra, such as dynamically loaded code, and what to do with breakpoins.
1071 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
1072 syms_from_objfile, above.
1073 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1075 Upon success, returns a pointer to the objfile that was added.
1076 Upon failure, jumps back to command level (never returns). */
1078 static struct objfile
*
1079 symbol_file_add_with_addrs_or_offsets (bfd
*abfd
,
1081 struct section_addr_info
*addrs
,
1082 struct section_offsets
*offsets
,
1086 struct objfile
*objfile
;
1087 struct cleanup
*my_cleanups
;
1088 const char *name
= bfd_get_filename (abfd
);
1089 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1091 if (readnow_symbol_files
)
1092 flags
|= OBJF_READNOW
;
1094 my_cleanups
= make_cleanup_bfd_close (abfd
);
1096 /* Give user a chance to burp if we'd be
1097 interactively wiping out any existing symbols. */
1099 if ((have_full_symbols () || have_partial_symbols ())
1100 && (add_flags
& SYMFILE_MAINLINE
)
1102 && !query (_("Load new symbol table from \"%s\"? "), name
))
1103 error (_("Not confirmed."));
1105 objfile
= allocate_objfile (abfd
, flags
);
1106 discard_cleanups (my_cleanups
);
1108 /* We either created a new mapped symbol table, mapped an existing
1109 symbol table file which has not had initial symbol reading
1110 performed, or need to read an unmapped symbol table. */
1111 if (from_tty
|| info_verbose
)
1113 if (deprecated_pre_add_symbol_hook
)
1114 deprecated_pre_add_symbol_hook (name
);
1117 printf_unfiltered (_("Reading symbols from %s..."), name
);
1119 gdb_flush (gdb_stdout
);
1122 syms_from_objfile (objfile
, addrs
, offsets
, num_offsets
,
1125 /* We now have at least a partial symbol table. Check to see if the
1126 user requested that all symbols be read on initial access via either
1127 the gdb startup command line or on a per symbol file basis. Expand
1128 all partial symbol tables for this objfile if so. */
1130 if ((flags
& OBJF_READNOW
))
1132 if (from_tty
|| info_verbose
)
1134 printf_unfiltered (_("expanding to full symbols..."));
1136 gdb_flush (gdb_stdout
);
1140 objfile
->sf
->qf
->expand_all_symtabs (objfile
);
1143 if ((from_tty
|| info_verbose
)
1144 && !objfile_has_symbols (objfile
))
1147 printf_unfiltered (_("(no debugging symbols found)..."));
1151 if (from_tty
|| info_verbose
)
1153 if (deprecated_post_add_symbol_hook
)
1154 deprecated_post_add_symbol_hook ();
1156 printf_unfiltered (_("done.\n"));
1159 /* We print some messages regardless of whether 'from_tty ||
1160 info_verbose' is true, so make sure they go out at the right
1162 gdb_flush (gdb_stdout
);
1164 do_cleanups (my_cleanups
);
1166 if (objfile
->sf
== NULL
)
1168 observer_notify_new_objfile (objfile
);
1169 return objfile
; /* No symbols. */
1172 new_symfile_objfile (objfile
, add_flags
);
1174 observer_notify_new_objfile (objfile
);
1176 bfd_cache_close_all ();
1180 /* Add BFD as a separate debug file for OBJFILE. */
1183 symbol_file_add_separate (bfd
*bfd
, int symfile_flags
, struct objfile
*objfile
)
1185 struct objfile
*new_objfile
;
1186 struct section_addr_info
*sap
;
1187 struct cleanup
*my_cleanup
;
1189 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1190 because sections of BFD may not match sections of OBJFILE and because
1191 vma may have been modified by tools such as prelink. */
1192 sap
= build_section_addr_info_from_objfile (objfile
);
1193 my_cleanup
= make_cleanup_free_section_addr_info (sap
);
1195 new_objfile
= symbol_file_add_with_addrs_or_offsets
1196 (bfd
, symfile_flags
,
1198 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1199 | OBJF_USERLOADED
));
1201 do_cleanups (my_cleanup
);
1203 add_separate_debug_objfile (new_objfile
, objfile
);
1206 /* Process the symbol file ABFD, as either the main file or as a
1207 dynamically loaded file.
1209 See symbol_file_add_with_addrs_or_offsets's comments for
1212 symbol_file_add_from_bfd (bfd
*abfd
, int add_flags
,
1213 struct section_addr_info
*addrs
,
1216 return symbol_file_add_with_addrs_or_offsets (abfd
, add_flags
, addrs
, 0, 0,
1221 /* Process a symbol file, as either the main file or as a dynamically
1222 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
1225 symbol_file_add (char *name
, int add_flags
, struct section_addr_info
*addrs
,
1228 return symbol_file_add_from_bfd (symfile_bfd_open (name
), add_flags
, addrs
,
1233 /* Call symbol_file_add() with default values and update whatever is
1234 affected by the loading of a new main().
1235 Used when the file is supplied in the gdb command line
1236 and by some targets with special loading requirements.
1237 The auxiliary function, symbol_file_add_main_1(), has the flags
1238 argument for the switches that can only be specified in the symbol_file
1242 symbol_file_add_main (char *args
, int from_tty
)
1244 symbol_file_add_main_1 (args
, from_tty
, 0);
1248 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
1250 const int add_flags
= SYMFILE_MAINLINE
| (from_tty
? SYMFILE_VERBOSE
: 0);
1251 symbol_file_add (args
, add_flags
, NULL
, flags
);
1253 /* Getting new symbols may change our opinion about
1254 what is frameless. */
1255 reinit_frame_cache ();
1257 set_initial_language ();
1261 symbol_file_clear (int from_tty
)
1263 if ((have_full_symbols () || have_partial_symbols ())
1266 ? !query (_("Discard symbol table from `%s'? "),
1267 symfile_objfile
->name
)
1268 : !query (_("Discard symbol table? "))))
1269 error (_("Not confirmed."));
1271 /* solib descriptors may have handles to objfiles. Wipe them before their
1272 objfiles get stale by free_all_objfiles. */
1273 no_shared_libraries (NULL
, from_tty
);
1275 free_all_objfiles ();
1277 gdb_assert (symfile_objfile
== NULL
);
1279 printf_unfiltered (_("No symbol file now.\n"));
1283 get_debug_link_info (struct objfile
*objfile
, unsigned long *crc32_out
)
1286 bfd_size_type debuglink_size
;
1287 unsigned long crc32
;
1291 sect
= bfd_get_section_by_name (objfile
->obfd
, ".gnu_debuglink");
1296 debuglink_size
= bfd_section_size (objfile
->obfd
, sect
);
1298 contents
= xmalloc (debuglink_size
);
1299 bfd_get_section_contents (objfile
->obfd
, sect
, contents
,
1300 (file_ptr
)0, (bfd_size_type
)debuglink_size
);
1302 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1303 crc_offset
= strlen (contents
) + 1;
1304 crc_offset
= (crc_offset
+ 3) & ~3;
1306 crc32
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) (contents
+ crc_offset
));
1313 separate_debug_file_exists (const char *name
, unsigned long crc
,
1314 struct objfile
*parent_objfile
)
1316 unsigned long file_crc
= 0;
1318 gdb_byte buffer
[8*1024];
1320 struct stat parent_stat
, abfd_stat
;
1322 /* Find a separate debug info file as if symbols would be present in
1323 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1324 section can contain just the basename of PARENT_OBJFILE without any
1325 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1326 the separate debug infos with the same basename can exist. */
1328 if (strcmp (name
, parent_objfile
->name
) == 0)
1331 abfd
= bfd_open_maybe_remote (name
);
1336 /* Verify symlinks were not the cause of strcmp name difference above.
1338 Some operating systems, e.g. Windows, do not provide a meaningful
1339 st_ino; they always set it to zero. (Windows does provide a
1340 meaningful st_dev.) Do not indicate a duplicate library in that
1341 case. While there is no guarantee that a system that provides
1342 meaningful inode numbers will never set st_ino to zero, this is
1343 merely an optimization, so we do not need to worry about false
1346 if (bfd_stat (abfd
, &abfd_stat
) == 0
1347 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0
1348 && abfd_stat
.st_dev
== parent_stat
.st_dev
1349 && abfd_stat
.st_ino
== parent_stat
.st_ino
1350 && abfd_stat
.st_ino
!= 0)
1356 while ((count
= bfd_bread (buffer
, sizeof (buffer
), abfd
)) > 0)
1357 file_crc
= gnu_debuglink_crc32 (file_crc
, buffer
, count
);
1361 if (crc
!= file_crc
)
1363 warning (_("the debug information found in \"%s\""
1364 " does not match \"%s\" (CRC mismatch).\n"),
1365 name
, parent_objfile
->name
);
1372 char *debug_file_directory
= NULL
;
1374 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1375 struct cmd_list_element
*c
, const char *value
)
1377 fprintf_filtered (file
, _("\
1378 The directory where separate debug symbols are searched for is \"%s\".\n"),
1382 #if ! defined (DEBUG_SUBDIRECTORY)
1383 #define DEBUG_SUBDIRECTORY ".debug"
1387 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1389 char *basename
, *debugdir
;
1391 char *debugfile
= NULL
;
1392 char *canon_name
= NULL
;
1393 unsigned long crc32
;
1396 basename
= get_debug_link_info (objfile
, &crc32
);
1398 if (basename
== NULL
)
1399 /* There's no separate debug info, hence there's no way we could
1400 load it => no warning. */
1401 goto cleanup_return_debugfile
;
1403 dir
= xstrdup (objfile
->name
);
1405 /* Strip off the final filename part, leaving the directory name,
1406 followed by a slash. The directory can be relative or absolute. */
1407 for (i
= strlen(dir
) - 1; i
>= 0; i
--)
1409 if (IS_DIR_SEPARATOR (dir
[i
]))
1412 /* If I is -1 then no directory is present there and DIR will be "". */
1415 /* Set I to max (strlen (canon_name), strlen (dir)). */
1416 canon_name
= lrealpath (dir
);
1418 if (canon_name
&& strlen (canon_name
) > i
)
1419 i
= strlen (canon_name
);
1421 debugfile
= xmalloc (strlen (debug_file_directory
) + 1
1423 + strlen (DEBUG_SUBDIRECTORY
)
1428 /* First try in the same directory as the original file. */
1429 strcpy (debugfile
, dir
);
1430 strcat (debugfile
, basename
);
1432 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1433 goto cleanup_return_debugfile
;
1435 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1436 strcpy (debugfile
, dir
);
1437 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1438 strcat (debugfile
, "/");
1439 strcat (debugfile
, basename
);
1441 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1442 goto cleanup_return_debugfile
;
1444 /* Then try in the global debugfile directories.
1446 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1447 cause "/..." lookups. */
1449 debugdir
= debug_file_directory
;
1454 while (*debugdir
== DIRNAME_SEPARATOR
)
1457 debugdir_end
= strchr (debugdir
, DIRNAME_SEPARATOR
);
1458 if (debugdir_end
== NULL
)
1459 debugdir_end
= &debugdir
[strlen (debugdir
)];
1461 memcpy (debugfile
, debugdir
, debugdir_end
- debugdir
);
1462 debugfile
[debugdir_end
- debugdir
] = 0;
1463 strcat (debugfile
, "/");
1464 strcat (debugfile
, dir
);
1465 strcat (debugfile
, basename
);
1467 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1468 goto cleanup_return_debugfile
;
1470 /* If the file is in the sysroot, try using its base path in the
1471 global debugfile directory. */
1473 && strncmp (canon_name
, gdb_sysroot
, strlen (gdb_sysroot
)) == 0
1474 && IS_DIR_SEPARATOR (canon_name
[strlen (gdb_sysroot
)]))
1476 memcpy (debugfile
, debugdir
, debugdir_end
- debugdir
);
1477 debugfile
[debugdir_end
- debugdir
] = 0;
1478 strcat (debugfile
, canon_name
+ strlen (gdb_sysroot
));
1479 strcat (debugfile
, "/");
1480 strcat (debugfile
, basename
);
1482 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1483 goto cleanup_return_debugfile
;
1486 debugdir
= debugdir_end
;
1488 while (*debugdir
!= 0);
1493 cleanup_return_debugfile
:
1501 /* This is the symbol-file command. Read the file, analyze its
1502 symbols, and add a struct symtab to a symtab list. The syntax of
1503 the command is rather bizarre:
1505 1. The function buildargv implements various quoting conventions
1506 which are undocumented and have little or nothing in common with
1507 the way things are quoted (or not quoted) elsewhere in GDB.
1509 2. Options are used, which are not generally used in GDB (perhaps
1510 "set mapped on", "set readnow on" would be better)
1512 3. The order of options matters, which is contrary to GNU
1513 conventions (because it is confusing and inconvenient). */
1516 symbol_file_command (char *args
, int from_tty
)
1522 symbol_file_clear (from_tty
);
1526 char **argv
= gdb_buildargv (args
);
1527 int flags
= OBJF_USERLOADED
;
1528 struct cleanup
*cleanups
;
1531 cleanups
= make_cleanup_freeargv (argv
);
1532 while (*argv
!= NULL
)
1534 if (strcmp (*argv
, "-readnow") == 0)
1535 flags
|= OBJF_READNOW
;
1536 else if (**argv
== '-')
1537 error (_("unknown option `%s'"), *argv
);
1540 symbol_file_add_main_1 (*argv
, from_tty
, flags
);
1548 error (_("no symbol file name was specified"));
1550 do_cleanups (cleanups
);
1554 /* Set the initial language.
1556 FIXME: A better solution would be to record the language in the
1557 psymtab when reading partial symbols, and then use it (if known) to
1558 set the language. This would be a win for formats that encode the
1559 language in an easily discoverable place, such as DWARF. For
1560 stabs, we can jump through hoops looking for specially named
1561 symbols or try to intuit the language from the specific type of
1562 stabs we find, but we can't do that until later when we read in
1566 set_initial_language (void)
1568 const char *filename
;
1569 enum language lang
= language_unknown
;
1571 filename
= find_main_filename ();
1572 if (filename
!= NULL
)
1573 lang
= deduce_language_from_filename (filename
);
1575 if (lang
== language_unknown
)
1577 /* Make C the default language */
1581 set_language (lang
);
1582 expected_language
= current_language
; /* Don't warn the user. */
1585 /* If NAME is a remote name open the file using remote protocol, otherwise
1586 open it normally. */
1589 bfd_open_maybe_remote (const char *name
)
1591 if (remote_filename_p (name
))
1592 return remote_bfd_open (name
, gnutarget
);
1594 return bfd_openr (name
, gnutarget
);
1598 /* Open the file specified by NAME and hand it off to BFD for
1599 preliminary analysis. Return a newly initialized bfd *, which
1600 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1601 absolute). In case of trouble, error() is called. */
1604 symfile_bfd_open (char *name
)
1608 char *absolute_name
;
1610 if (remote_filename_p (name
))
1612 name
= xstrdup (name
);
1613 sym_bfd
= remote_bfd_open (name
, gnutarget
);
1616 make_cleanup (xfree
, name
);
1617 error (_("`%s': can't open to read symbols: %s."), name
,
1618 bfd_errmsg (bfd_get_error ()));
1621 if (!bfd_check_format (sym_bfd
, bfd_object
))
1623 bfd_close (sym_bfd
);
1624 make_cleanup (xfree
, name
);
1625 error (_("`%s': can't read symbols: %s."), name
,
1626 bfd_errmsg (bfd_get_error ()));
1632 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy. */
1634 /* Look down path for it, allocate 2nd new malloc'd copy. */
1635 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, name
,
1636 O_RDONLY
| O_BINARY
, &absolute_name
);
1637 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1640 char *exename
= alloca (strlen (name
) + 5);
1642 strcat (strcpy (exename
, name
), ".exe");
1643 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, exename
,
1644 O_RDONLY
| O_BINARY
, &absolute_name
);
1649 make_cleanup (xfree
, name
);
1650 perror_with_name (name
);
1653 /* Free 1st new malloc'd copy, but keep the 2nd malloc'd copy in
1654 bfd. It'll be freed in free_objfile(). */
1656 name
= absolute_name
;
1658 sym_bfd
= bfd_fopen (name
, gnutarget
, FOPEN_RB
, desc
);
1662 make_cleanup (xfree
, name
);
1663 error (_("`%s': can't open to read symbols: %s."), name
,
1664 bfd_errmsg (bfd_get_error ()));
1666 bfd_set_cacheable (sym_bfd
, 1);
1668 if (!bfd_check_format (sym_bfd
, bfd_object
))
1670 /* FIXME: should be checking for errors from bfd_close (for one
1671 thing, on error it does not free all the storage associated
1673 bfd_close (sym_bfd
); /* This also closes desc. */
1674 make_cleanup (xfree
, name
);
1675 error (_("`%s': can't read symbols: %s."), name
,
1676 bfd_errmsg (bfd_get_error ()));
1679 /* bfd_usrdata exists for applications and libbfd must not touch it. */
1680 gdb_assert (bfd_usrdata (sym_bfd
) == NULL
);
1685 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1686 the section was not found. */
1689 get_section_index (struct objfile
*objfile
, char *section_name
)
1691 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1699 /* Link SF into the global symtab_fns list. Called on startup by the
1700 _initialize routine in each object file format reader, to register
1701 information about each format the the reader is prepared to
1705 add_symtab_fns (struct sym_fns
*sf
)
1707 sf
->next
= symtab_fns
;
1711 /* Initialize OBJFILE to read symbols from its associated BFD. It
1712 either returns or calls error(). The result is an initialized
1713 struct sym_fns in the objfile structure, that contains cached
1714 information about the symbol file. */
1716 static struct sym_fns
*
1717 find_sym_fns (bfd
*abfd
)
1720 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1722 if (our_flavour
== bfd_target_srec_flavour
1723 || our_flavour
== bfd_target_ihex_flavour
1724 || our_flavour
== bfd_target_tekhex_flavour
)
1725 return NULL
; /* No symbols. */
1727 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
->next
)
1728 if (our_flavour
== sf
->sym_flavour
)
1731 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1732 bfd_get_target (abfd
));
1736 /* This function runs the load command of our current target. */
1739 load_command (char *arg
, int from_tty
)
1741 /* The user might be reloading because the binary has changed. Take
1742 this opportunity to check. */
1743 reopen_exec_file ();
1751 parg
= arg
= get_exec_file (1);
1753 /* Count how many \ " ' tab space there are in the name. */
1754 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1762 /* We need to quote this string so buildargv can pull it apart. */
1763 char *temp
= xmalloc (strlen (arg
) + count
+ 1 );
1767 make_cleanup (xfree
, temp
);
1770 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1772 strncpy (ptemp
, prev
, parg
- prev
);
1773 ptemp
+= parg
- prev
;
1777 strcpy (ptemp
, prev
);
1783 target_load (arg
, from_tty
);
1785 /* After re-loading the executable, we don't really know which
1786 overlays are mapped any more. */
1787 overlay_cache_invalid
= 1;
1790 /* This version of "load" should be usable for any target. Currently
1791 it is just used for remote targets, not inftarg.c or core files,
1792 on the theory that only in that case is it useful.
1794 Avoiding xmodem and the like seems like a win (a) because we don't have
1795 to worry about finding it, and (b) On VMS, fork() is very slow and so
1796 we don't want to run a subprocess. On the other hand, I'm not sure how
1797 performance compares. */
1799 static int validate_download
= 0;
1801 /* Callback service function for generic_load (bfd_map_over_sections). */
1804 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1806 bfd_size_type
*sum
= data
;
1808 *sum
+= bfd_get_section_size (asec
);
1811 /* Opaque data for load_section_callback. */
1812 struct load_section_data
{
1813 unsigned long load_offset
;
1814 struct load_progress_data
*progress_data
;
1815 VEC(memory_write_request_s
) *requests
;
1818 /* Opaque data for load_progress. */
1819 struct load_progress_data
{
1820 /* Cumulative data. */
1821 unsigned long write_count
;
1822 unsigned long data_count
;
1823 bfd_size_type total_size
;
1826 /* Opaque data for load_progress for a single section. */
1827 struct load_progress_section_data
{
1828 struct load_progress_data
*cumulative
;
1830 /* Per-section data. */
1831 const char *section_name
;
1832 ULONGEST section_sent
;
1833 ULONGEST section_size
;
1838 /* Target write callback routine for progress reporting. */
1841 load_progress (ULONGEST bytes
, void *untyped_arg
)
1843 struct load_progress_section_data
*args
= untyped_arg
;
1844 struct load_progress_data
*totals
;
1847 /* Writing padding data. No easy way to get at the cumulative
1848 stats, so just ignore this. */
1851 totals
= args
->cumulative
;
1853 if (bytes
== 0 && args
->section_sent
== 0)
1855 /* The write is just starting. Let the user know we've started
1857 ui_out_message (uiout
, 0, "Loading section %s, size %s lma %s\n",
1858 args
->section_name
, hex_string (args
->section_size
),
1859 paddress (target_gdbarch
, args
->lma
));
1863 if (validate_download
)
1865 /* Broken memories and broken monitors manifest themselves here
1866 when bring new computers to life. This doubles already slow
1868 /* NOTE: cagney/1999-10-18: A more efficient implementation
1869 might add a verify_memory() method to the target vector and
1870 then use that. remote.c could implement that method using
1871 the ``qCRC'' packet. */
1872 gdb_byte
*check
= xmalloc (bytes
);
1873 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
1875 if (target_read_memory (args
->lma
, check
, bytes
) != 0)
1876 error (_("Download verify read failed at %s"),
1877 paddress (target_gdbarch
, args
->lma
));
1878 if (memcmp (args
->buffer
, check
, bytes
) != 0)
1879 error (_("Download verify compare failed at %s"),
1880 paddress (target_gdbarch
, args
->lma
));
1881 do_cleanups (verify_cleanups
);
1883 totals
->data_count
+= bytes
;
1885 args
->buffer
+= bytes
;
1886 totals
->write_count
+= 1;
1887 args
->section_sent
+= bytes
;
1889 || (deprecated_ui_load_progress_hook
!= NULL
1890 && deprecated_ui_load_progress_hook (args
->section_name
,
1891 args
->section_sent
)))
1892 error (_("Canceled the download"));
1894 if (deprecated_show_load_progress
!= NULL
)
1895 deprecated_show_load_progress (args
->section_name
,
1899 totals
->total_size
);
1902 /* Callback service function for generic_load (bfd_map_over_sections). */
1905 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1907 struct memory_write_request
*new_request
;
1908 struct load_section_data
*args
= data
;
1909 struct load_progress_section_data
*section_data
;
1910 bfd_size_type size
= bfd_get_section_size (asec
);
1912 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1914 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
1920 new_request
= VEC_safe_push (memory_write_request_s
,
1921 args
->requests
, NULL
);
1922 memset (new_request
, 0, sizeof (struct memory_write_request
));
1923 section_data
= xcalloc (1, sizeof (struct load_progress_section_data
));
1924 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1925 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size be in instead? */
1926 new_request
->data
= xmalloc (size
);
1927 new_request
->baton
= section_data
;
1929 buffer
= new_request
->data
;
1931 section_data
->cumulative
= args
->progress_data
;
1932 section_data
->section_name
= sect_name
;
1933 section_data
->section_size
= size
;
1934 section_data
->lma
= new_request
->begin
;
1935 section_data
->buffer
= buffer
;
1937 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1940 /* Clean up an entire memory request vector, including load
1941 data and progress records. */
1944 clear_memory_write_data (void *arg
)
1946 VEC(memory_write_request_s
) **vec_p
= arg
;
1947 VEC(memory_write_request_s
) *vec
= *vec_p
;
1949 struct memory_write_request
*mr
;
1951 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
1956 VEC_free (memory_write_request_s
, vec
);
1960 generic_load (char *args
, int from_tty
)
1963 struct timeval start_time
, end_time
;
1965 struct cleanup
*old_cleanups
= make_cleanup (null_cleanup
, 0);
1966 struct load_section_data cbdata
;
1967 struct load_progress_data total_progress
;
1972 memset (&cbdata
, 0, sizeof (cbdata
));
1973 memset (&total_progress
, 0, sizeof (total_progress
));
1974 cbdata
.progress_data
= &total_progress
;
1976 make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
1979 error_no_arg (_("file to load"));
1981 argv
= gdb_buildargv (args
);
1982 make_cleanup_freeargv (argv
);
1984 filename
= tilde_expand (argv
[0]);
1985 make_cleanup (xfree
, filename
);
1987 if (argv
[1] != NULL
)
1991 cbdata
.load_offset
= strtoul (argv
[1], &endptr
, 0);
1993 /* If the last word was not a valid number then
1994 treat it as a file name with spaces in. */
1995 if (argv
[1] == endptr
)
1996 error (_("Invalid download offset:%s."), argv
[1]);
1998 if (argv
[2] != NULL
)
1999 error (_("Too many parameters."));
2002 /* Open the file for loading. */
2003 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
2004 if (loadfile_bfd
== NULL
)
2006 perror_with_name (filename
);
2010 /* FIXME: should be checking for errors from bfd_close (for one thing,
2011 on error it does not free all the storage associated with the
2013 make_cleanup_bfd_close (loadfile_bfd
);
2015 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
2017 error (_("\"%s\" is not an object file: %s"), filename
,
2018 bfd_errmsg (bfd_get_error ()));
2021 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
2022 (void *) &total_progress
.total_size
);
2024 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
2026 gettimeofday (&start_time
, NULL
);
2028 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2029 load_progress
) != 0)
2030 error (_("Load failed"));
2032 gettimeofday (&end_time
, NULL
);
2034 entry
= bfd_get_start_address (loadfile_bfd
);
2035 ui_out_text (uiout
, "Start address ");
2036 ui_out_field_fmt (uiout
, "address", "%s", paddress (target_gdbarch
, entry
));
2037 ui_out_text (uiout
, ", load size ");
2038 ui_out_field_fmt (uiout
, "load-size", "%lu", total_progress
.data_count
);
2039 ui_out_text (uiout
, "\n");
2040 /* We were doing this in remote-mips.c, I suspect it is right
2041 for other targets too. */
2042 regcache_write_pc (get_current_regcache (), entry
);
2044 /* Reset breakpoints, now that we have changed the load image. For
2045 instance, breakpoints may have been set (or reset, by
2046 post_create_inferior) while connected to the target but before we
2047 loaded the program. In that case, the prologue analyzer could
2048 have read instructions from the target to find the right
2049 breakpoint locations. Loading has changed the contents of that
2052 breakpoint_re_set ();
2054 /* FIXME: are we supposed to call symbol_file_add or not? According
2055 to a comment from remote-mips.c (where a call to symbol_file_add
2056 was commented out), making the call confuses GDB if more than one
2057 file is loaded in. Some targets do (e.g., remote-vx.c) but
2058 others don't (or didn't - perhaps they have all been deleted). */
2060 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2061 total_progress
.write_count
,
2062 &start_time
, &end_time
);
2064 do_cleanups (old_cleanups
);
2067 /* Report how fast the transfer went. */
2069 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
2070 replaced by print_transfer_performance (with a very different
2071 function signature). */
2074 report_transfer_performance (unsigned long data_count
, time_t start_time
,
2077 struct timeval start
, end
;
2079 start
.tv_sec
= start_time
;
2081 end
.tv_sec
= end_time
;
2084 print_transfer_performance (gdb_stdout
, data_count
, 0, &start
, &end
);
2088 print_transfer_performance (struct ui_file
*stream
,
2089 unsigned long data_count
,
2090 unsigned long write_count
,
2091 const struct timeval
*start_time
,
2092 const struct timeval
*end_time
)
2094 ULONGEST time_count
;
2096 /* Compute the elapsed time in milliseconds, as a tradeoff between
2097 accuracy and overflow. */
2098 time_count
= (end_time
->tv_sec
- start_time
->tv_sec
) * 1000;
2099 time_count
+= (end_time
->tv_usec
- start_time
->tv_usec
) / 1000;
2101 ui_out_text (uiout
, "Transfer rate: ");
2104 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / time_count
;
2106 if (ui_out_is_mi_like_p (uiout
))
2108 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
* 8);
2109 ui_out_text (uiout
, " bits/sec");
2111 else if (rate
< 1024)
2113 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
);
2114 ui_out_text (uiout
, " bytes/sec");
2118 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
/ 1024);
2119 ui_out_text (uiout
, " KB/sec");
2124 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
2125 ui_out_text (uiout
, " bits in <1 sec");
2127 if (write_count
> 0)
2129 ui_out_text (uiout
, ", ");
2130 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
2131 ui_out_text (uiout
, " bytes/write");
2133 ui_out_text (uiout
, ".\n");
2136 /* This function allows the addition of incrementally linked object files.
2137 It does not modify any state in the target, only in the debugger. */
2138 /* Note: ezannoni 2000-04-13 This function/command used to have a
2139 special case syntax for the rombug target (Rombug is the boot
2140 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2141 rombug case, the user doesn't need to supply a text address,
2142 instead a call to target_link() (in target.c) would supply the
2143 value to use. We are now discontinuing this type of ad hoc syntax. */
2146 add_symbol_file_command (char *args
, int from_tty
)
2148 struct gdbarch
*gdbarch
= get_current_arch ();
2149 char *filename
= NULL
;
2150 int flags
= OBJF_USERLOADED
;
2152 int section_index
= 0;
2156 int expecting_sec_name
= 0;
2157 int expecting_sec_addr
= 0;
2166 struct section_addr_info
*section_addrs
;
2167 struct sect_opt
*sect_opts
= NULL
;
2168 size_t num_sect_opts
= 0;
2169 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2172 sect_opts
= (struct sect_opt
*) xmalloc (num_sect_opts
2173 * sizeof (struct sect_opt
));
2178 error (_("add-symbol-file takes a file name and an address"));
2180 argv
= gdb_buildargv (args
);
2181 make_cleanup_freeargv (argv
);
2183 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2185 /* Process the argument. */
2188 /* The first argument is the file name. */
2189 filename
= tilde_expand (arg
);
2190 make_cleanup (xfree
, filename
);
2195 /* The second argument is always the text address at which
2196 to load the program. */
2197 sect_opts
[section_index
].name
= ".text";
2198 sect_opts
[section_index
].value
= arg
;
2199 if (++section_index
>= num_sect_opts
)
2202 sect_opts
= ((struct sect_opt
*)
2203 xrealloc (sect_opts
,
2205 * sizeof (struct sect_opt
)));
2210 /* It's an option (starting with '-') or it's an argument
2215 if (strcmp (arg
, "-readnow") == 0)
2216 flags
|= OBJF_READNOW
;
2217 else if (strcmp (arg
, "-s") == 0)
2219 expecting_sec_name
= 1;
2220 expecting_sec_addr
= 1;
2225 if (expecting_sec_name
)
2227 sect_opts
[section_index
].name
= arg
;
2228 expecting_sec_name
= 0;
2231 if (expecting_sec_addr
)
2233 sect_opts
[section_index
].value
= arg
;
2234 expecting_sec_addr
= 0;
2235 if (++section_index
>= num_sect_opts
)
2238 sect_opts
= ((struct sect_opt
*)
2239 xrealloc (sect_opts
,
2241 * sizeof (struct sect_opt
)));
2245 error (_("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*"));
2250 /* This command takes at least two arguments. The first one is a
2251 filename, and the second is the address where this file has been
2252 loaded. Abort now if this address hasn't been provided by the
2254 if (section_index
< 1)
2255 error (_("The address where %s has been loaded is missing"), filename
);
2257 /* Print the prompt for the query below. And save the arguments into
2258 a sect_addr_info structure to be passed around to other
2259 functions. We have to split this up into separate print
2260 statements because hex_string returns a local static
2263 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename
);
2264 section_addrs
= alloc_section_addr_info (section_index
);
2265 make_cleanup (xfree
, section_addrs
);
2266 for (i
= 0; i
< section_index
; i
++)
2269 char *val
= sect_opts
[i
].value
;
2270 char *sec
= sect_opts
[i
].name
;
2272 addr
= parse_and_eval_address (val
);
2274 /* Here we store the section offsets in the order they were
2275 entered on the command line. */
2276 section_addrs
->other
[sec_num
].name
= sec
;
2277 section_addrs
->other
[sec_num
].addr
= addr
;
2278 printf_unfiltered ("\t%s_addr = %s\n", sec
,
2279 paddress (gdbarch
, addr
));
2282 /* The object's sections are initialized when a
2283 call is made to build_objfile_section_table (objfile).
2284 This happens in reread_symbols.
2285 At this point, we don't know what file type this is,
2286 so we can't determine what section names are valid. */
2289 if (from_tty
&& (!query ("%s", "")))
2290 error (_("Not confirmed."));
2292 symbol_file_add (filename
, from_tty
? SYMFILE_VERBOSE
: 0,
2293 section_addrs
, flags
);
2295 /* Getting new symbols may change our opinion about what is
2297 reinit_frame_cache ();
2298 do_cleanups (my_cleanups
);
2302 /* Re-read symbols if a symbol-file has changed. */
2304 reread_symbols (void)
2306 struct objfile
*objfile
;
2309 struct stat new_statbuf
;
2312 /* With the addition of shared libraries, this should be modified,
2313 the load time should be saved in the partial symbol tables, since
2314 different tables may come from different source files. FIXME.
2315 This routine should then walk down each partial symbol table
2316 and see if the symbol table that it originates from has been changed */
2318 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2320 /* solib-sunos.c creates one objfile with obfd. */
2321 if (objfile
->obfd
== NULL
)
2324 /* Separate debug objfiles are handled in the main objfile. */
2325 if (objfile
->separate_debug_objfile_backlink
)
2328 /* If this object is from an archive (what you usually create with
2329 `ar', often called a `static library' on most systems, though
2330 a `shared library' on AIX is also an archive), then you should
2331 stat on the archive name, not member name. */
2332 if (objfile
->obfd
->my_archive
)
2333 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2335 res
= stat (objfile
->name
, &new_statbuf
);
2338 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2339 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2343 new_modtime
= new_statbuf
.st_mtime
;
2344 if (new_modtime
!= objfile
->mtime
)
2346 struct cleanup
*old_cleanups
;
2347 struct section_offsets
*offsets
;
2349 char *obfd_filename
;
2351 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2354 /* There are various functions like symbol_file_add,
2355 symfile_bfd_open, syms_from_objfile, etc., which might
2356 appear to do what we want. But they have various other
2357 effects which we *don't* want. So we just do stuff
2358 ourselves. We don't worry about mapped files (for one thing,
2359 any mapped file will be out of date). */
2361 /* If we get an error, blow away this objfile (not sure if
2362 that is the correct response for things like shared
2364 old_cleanups
= make_cleanup_free_objfile (objfile
);
2365 /* We need to do this whenever any symbols go away. */
2366 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2368 if (exec_bfd
!= NULL
&& strcmp (bfd_get_filename (objfile
->obfd
),
2369 bfd_get_filename (exec_bfd
)) == 0)
2371 /* Reload EXEC_BFD without asking anything. */
2373 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2376 /* Clean up any state BFD has sitting around. We don't need
2377 to close the descriptor but BFD lacks a way of closing the
2378 BFD without closing the descriptor. */
2379 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2380 if (!bfd_close (objfile
->obfd
))
2381 error (_("Can't close BFD for %s: %s"), objfile
->name
,
2382 bfd_errmsg (bfd_get_error ()));
2383 objfile
->obfd
= bfd_open_maybe_remote (obfd_filename
);
2384 if (objfile
->obfd
== NULL
)
2385 error (_("Can't open %s to read symbols."), objfile
->name
);
2387 objfile
->obfd
= gdb_bfd_ref (objfile
->obfd
);
2388 /* bfd_openr sets cacheable to true, which is what we want. */
2389 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2390 error (_("Can't read symbols from %s: %s."), objfile
->name
,
2391 bfd_errmsg (bfd_get_error ()));
2393 /* Save the offsets, we will nuke them with the rest of the
2395 num_offsets
= objfile
->num_sections
;
2396 offsets
= ((struct section_offsets
*)
2397 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2398 memcpy (offsets
, objfile
->section_offsets
,
2399 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2401 /* Remove any references to this objfile in the global
2403 preserve_values (objfile
);
2405 /* Nuke all the state that we will re-read. Much of the following
2406 code which sets things to NULL really is necessary to tell
2407 other parts of GDB that there is nothing currently there.
2409 Try to keep the freeing order compatible with free_objfile. */
2411 if (objfile
->sf
!= NULL
)
2413 (*objfile
->sf
->sym_finish
) (objfile
);
2416 clear_objfile_data (objfile
);
2418 /* Free the separate debug objfiles. It will be
2419 automatically recreated by sym_read. */
2420 free_objfile_separate_debug (objfile
);
2422 /* FIXME: Do we have to free a whole linked list, or is this
2424 if (objfile
->global_psymbols
.list
)
2425 xfree (objfile
->global_psymbols
.list
);
2426 memset (&objfile
->global_psymbols
, 0,
2427 sizeof (objfile
->global_psymbols
));
2428 if (objfile
->static_psymbols
.list
)
2429 xfree (objfile
->static_psymbols
.list
);
2430 memset (&objfile
->static_psymbols
, 0,
2431 sizeof (objfile
->static_psymbols
));
2433 /* Free the obstacks for non-reusable objfiles */
2434 bcache_xfree (objfile
->psymbol_cache
);
2435 objfile
->psymbol_cache
= bcache_xmalloc (psymbol_hash
,
2437 bcache_xfree (objfile
->macro_cache
);
2438 objfile
->macro_cache
= bcache_xmalloc (NULL
, NULL
);
2439 bcache_xfree (objfile
->filename_cache
);
2440 objfile
->filename_cache
= bcache_xmalloc (NULL
,NULL
);
2441 if (objfile
->demangled_names_hash
!= NULL
)
2443 htab_delete (objfile
->demangled_names_hash
);
2444 objfile
->demangled_names_hash
= NULL
;
2446 obstack_free (&objfile
->objfile_obstack
, 0);
2447 objfile
->sections
= NULL
;
2448 objfile
->symtabs
= NULL
;
2449 objfile
->psymtabs
= NULL
;
2450 objfile
->psymtabs_addrmap
= NULL
;
2451 objfile
->free_psymtabs
= NULL
;
2452 objfile
->cp_namespace_symtab
= NULL
;
2453 objfile
->template_symbols
= NULL
;
2454 objfile
->msymbols
= NULL
;
2455 objfile
->deprecated_sym_private
= NULL
;
2456 objfile
->minimal_symbol_count
= 0;
2457 memset (&objfile
->msymbol_hash
, 0,
2458 sizeof (objfile
->msymbol_hash
));
2459 memset (&objfile
->msymbol_demangled_hash
, 0,
2460 sizeof (objfile
->msymbol_demangled_hash
));
2462 objfile
->psymbol_cache
= bcache_xmalloc (psymbol_hash
,
2464 objfile
->macro_cache
= bcache_xmalloc (NULL
, NULL
);
2465 objfile
->filename_cache
= bcache_xmalloc (NULL
, NULL
);
2466 /* obstack_init also initializes the obstack so it is
2467 empty. We could use obstack_specify_allocation but
2468 gdb_obstack.h specifies the alloc/dealloc
2470 obstack_init (&objfile
->objfile_obstack
);
2471 if (build_objfile_section_table (objfile
))
2473 error (_("Can't find the file sections in `%s': %s"),
2474 objfile
->name
, bfd_errmsg (bfd_get_error ()));
2476 terminate_minimal_symbol_table (objfile
);
2478 /* We use the same section offsets as from last time. I'm not
2479 sure whether that is always correct for shared libraries. */
2480 objfile
->section_offsets
= (struct section_offsets
*)
2481 obstack_alloc (&objfile
->objfile_obstack
,
2482 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2483 memcpy (objfile
->section_offsets
, offsets
,
2484 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2485 objfile
->num_sections
= num_offsets
;
2487 /* What the hell is sym_new_init for, anyway? The concept of
2488 distinguishing between the main file and additional files
2489 in this way seems rather dubious. */
2490 if (objfile
== symfile_objfile
)
2492 (*objfile
->sf
->sym_new_init
) (objfile
);
2495 (*objfile
->sf
->sym_init
) (objfile
);
2496 clear_complaints (&symfile_complaints
, 1, 1);
2497 /* Do not set flags as this is safe and we don't want to be
2499 (*objfile
->sf
->sym_read
) (objfile
, 0);
2500 if (!objfile_has_symbols (objfile
))
2503 printf_unfiltered (_("(no debugging symbols found)\n"));
2507 /* We're done reading the symbol file; finish off complaints. */
2508 clear_complaints (&symfile_complaints
, 0, 1);
2510 /* Getting new symbols may change our opinion about what is
2513 reinit_frame_cache ();
2515 /* Discard cleanups as symbol reading was successful. */
2516 discard_cleanups (old_cleanups
);
2518 /* If the mtime has changed between the time we set new_modtime
2519 and now, we *want* this to be out of date, so don't call stat
2521 objfile
->mtime
= new_modtime
;
2523 init_entry_point_info (objfile
);
2529 /* Notify objfiles that we've modified objfile sections. */
2530 objfiles_changed ();
2532 clear_symtab_users ();
2533 /* At least one objfile has changed, so we can consider that
2534 the executable we're debugging has changed too. */
2535 observer_notify_executable_changed ();
2548 static filename_language
*filename_language_table
;
2549 static int fl_table_size
, fl_table_next
;
2552 add_filename_language (char *ext
, enum language lang
)
2554 if (fl_table_next
>= fl_table_size
)
2556 fl_table_size
+= 10;
2557 filename_language_table
=
2558 xrealloc (filename_language_table
,
2559 fl_table_size
* sizeof (*filename_language_table
));
2562 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2563 filename_language_table
[fl_table_next
].lang
= lang
;
2567 static char *ext_args
;
2569 show_ext_args (struct ui_file
*file
, int from_tty
,
2570 struct cmd_list_element
*c
, const char *value
)
2572 fprintf_filtered (file
, _("\
2573 Mapping between filename extension and source language is \"%s\".\n"),
2578 set_ext_lang_command (char *args
, int from_tty
, struct cmd_list_element
*e
)
2581 char *cp
= ext_args
;
2584 /* First arg is filename extension, starting with '.' */
2586 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2588 /* Find end of first arg. */
2589 while (*cp
&& !isspace (*cp
))
2593 error (_("'%s': two arguments required -- filename extension and language"),
2596 /* Null-terminate first arg */
2599 /* Find beginning of second arg, which should be a source language. */
2600 while (*cp
&& isspace (*cp
))
2604 error (_("'%s': two arguments required -- filename extension and language"),
2607 /* Lookup the language from among those we know. */
2608 lang
= language_enum (cp
);
2610 /* Now lookup the filename extension: do we already know it? */
2611 for (i
= 0; i
< fl_table_next
; i
++)
2612 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2615 if (i
>= fl_table_next
)
2617 /* new file extension */
2618 add_filename_language (ext_args
, lang
);
2622 /* redefining a previously known filename extension */
2625 /* query ("Really make files of type %s '%s'?", */
2626 /* ext_args, language_str (lang)); */
2628 xfree (filename_language_table
[i
].ext
);
2629 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2630 filename_language_table
[i
].lang
= lang
;
2635 info_ext_lang_command (char *args
, int from_tty
)
2639 printf_filtered (_("Filename extensions and the languages they represent:"));
2640 printf_filtered ("\n\n");
2641 for (i
= 0; i
< fl_table_next
; i
++)
2642 printf_filtered ("\t%s\t- %s\n",
2643 filename_language_table
[i
].ext
,
2644 language_str (filename_language_table
[i
].lang
));
2648 init_filename_language_table (void)
2650 if (fl_table_size
== 0) /* protect against repetition */
2654 filename_language_table
=
2655 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
2656 add_filename_language (".c", language_c
);
2657 add_filename_language (".d", language_d
);
2658 add_filename_language (".C", language_cplus
);
2659 add_filename_language (".cc", language_cplus
);
2660 add_filename_language (".cp", language_cplus
);
2661 add_filename_language (".cpp", language_cplus
);
2662 add_filename_language (".cxx", language_cplus
);
2663 add_filename_language (".c++", language_cplus
);
2664 add_filename_language (".java", language_java
);
2665 add_filename_language (".class", language_java
);
2666 add_filename_language (".m", language_objc
);
2667 add_filename_language (".f", language_fortran
);
2668 add_filename_language (".F", language_fortran
);
2669 add_filename_language (".for", language_fortran
);
2670 add_filename_language (".FOR", language_fortran
);
2671 add_filename_language (".ftn", language_fortran
);
2672 add_filename_language (".FTN", language_fortran
);
2673 add_filename_language (".fpp", language_fortran
);
2674 add_filename_language (".FPP", language_fortran
);
2675 add_filename_language (".f90", language_fortran
);
2676 add_filename_language (".F90", language_fortran
);
2677 add_filename_language (".f95", language_fortran
);
2678 add_filename_language (".F95", language_fortran
);
2679 add_filename_language (".f03", language_fortran
);
2680 add_filename_language (".F03", language_fortran
);
2681 add_filename_language (".f08", language_fortran
);
2682 add_filename_language (".F08", language_fortran
);
2683 add_filename_language (".s", language_asm
);
2684 add_filename_language (".sx", language_asm
);
2685 add_filename_language (".S", language_asm
);
2686 add_filename_language (".pas", language_pascal
);
2687 add_filename_language (".p", language_pascal
);
2688 add_filename_language (".pp", language_pascal
);
2689 add_filename_language (".adb", language_ada
);
2690 add_filename_language (".ads", language_ada
);
2691 add_filename_language (".a", language_ada
);
2692 add_filename_language (".ada", language_ada
);
2693 add_filename_language (".dg", language_ada
);
2698 deduce_language_from_filename (const char *filename
)
2703 if (filename
!= NULL
)
2704 if ((cp
= strrchr (filename
, '.')) != NULL
)
2705 for (i
= 0; i
< fl_table_next
; i
++)
2706 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2707 return filename_language_table
[i
].lang
;
2709 return language_unknown
;
2714 Allocate and partly initialize a new symbol table. Return a pointer
2715 to it. error() if no space.
2717 Caller must set these fields:
2726 allocate_symtab (char *filename
, struct objfile
*objfile
)
2728 struct symtab
*symtab
;
2730 symtab
= (struct symtab
*)
2731 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symtab
));
2732 memset (symtab
, 0, sizeof (*symtab
));
2733 symtab
->filename
= (char *) bcache (filename
, strlen (filename
) + 1,
2734 objfile
->filename_cache
);
2735 symtab
->fullname
= NULL
;
2736 symtab
->language
= deduce_language_from_filename (filename
);
2737 symtab
->debugformat
= "unknown";
2739 /* Hook it to the objfile it comes from */
2741 symtab
->objfile
= objfile
;
2742 symtab
->next
= objfile
->symtabs
;
2743 objfile
->symtabs
= symtab
;
2749 /* Reset all data structures in gdb which may contain references to symbol
2753 clear_symtab_users (void)
2755 /* Someday, we should do better than this, by only blowing away
2756 the things that really need to be blown. */
2758 /* Clear the "current" symtab first, because it is no longer valid.
2759 breakpoint_re_set may try to access the current symtab. */
2760 clear_current_source_symtab_and_line ();
2763 breakpoint_re_set ();
2764 set_default_breakpoint (0, NULL
, 0, 0, 0);
2765 clear_pc_function_cache ();
2766 observer_notify_new_objfile (NULL
);
2768 /* Clear globals which might have pointed into a removed objfile.
2769 FIXME: It's not clear which of these are supposed to persist
2770 between expressions and which ought to be reset each time. */
2771 expression_context_block
= NULL
;
2772 innermost_block
= NULL
;
2774 /* Varobj may refer to old symbols, perform a cleanup. */
2775 varobj_invalidate ();
2780 clear_symtab_users_cleanup (void *ignore
)
2782 clear_symtab_users ();
2786 The following code implements an abstraction for debugging overlay sections.
2788 The target model is as follows:
2789 1) The gnu linker will permit multiple sections to be mapped into the
2790 same VMA, each with its own unique LMA (or load address).
2791 2) It is assumed that some runtime mechanism exists for mapping the
2792 sections, one by one, from the load address into the VMA address.
2793 3) This code provides a mechanism for gdb to keep track of which
2794 sections should be considered to be mapped from the VMA to the LMA.
2795 This information is used for symbol lookup, and memory read/write.
2796 For instance, if a section has been mapped then its contents
2797 should be read from the VMA, otherwise from the LMA.
2799 Two levels of debugger support for overlays are available. One is
2800 "manual", in which the debugger relies on the user to tell it which
2801 overlays are currently mapped. This level of support is
2802 implemented entirely in the core debugger, and the information about
2803 whether a section is mapped is kept in the objfile->obj_section table.
2805 The second level of support is "automatic", and is only available if
2806 the target-specific code provides functionality to read the target's
2807 overlay mapping table, and translate its contents for the debugger
2808 (by updating the mapped state information in the obj_section tables).
2810 The interface is as follows:
2812 overlay map <name> -- tell gdb to consider this section mapped
2813 overlay unmap <name> -- tell gdb to consider this section unmapped
2814 overlay list -- list the sections that GDB thinks are mapped
2815 overlay read-target -- get the target's state of what's mapped
2816 overlay off/manual/auto -- set overlay debugging state
2817 Functional interface:
2818 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2819 section, return that section.
2820 find_pc_overlay(pc): find any overlay section that contains
2821 the pc, either in its VMA or its LMA
2822 section_is_mapped(sect): true if overlay is marked as mapped
2823 section_is_overlay(sect): true if section's VMA != LMA
2824 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2825 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2826 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2827 overlay_mapped_address(...): map an address from section's LMA to VMA
2828 overlay_unmapped_address(...): map an address from section's VMA to LMA
2829 symbol_overlayed_address(...): Return a "current" address for symbol:
2830 either in VMA or LMA depending on whether
2831 the symbol's section is currently mapped
2834 /* Overlay debugging state: */
2836 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2837 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
2839 /* Function: section_is_overlay (SECTION)
2840 Returns true if SECTION has VMA not equal to LMA, ie.
2841 SECTION is loaded at an address different from where it will "run". */
2844 section_is_overlay (struct obj_section
*section
)
2846 if (overlay_debugging
&& section
)
2848 bfd
*abfd
= section
->objfile
->obfd
;
2849 asection
*bfd_section
= section
->the_bfd_section
;
2851 if (bfd_section_lma (abfd
, bfd_section
) != 0
2852 && bfd_section_lma (abfd
, bfd_section
)
2853 != bfd_section_vma (abfd
, bfd_section
))
2860 /* Function: overlay_invalidate_all (void)
2861 Invalidate the mapped state of all overlay sections (mark it as stale). */
2864 overlay_invalidate_all (void)
2866 struct objfile
*objfile
;
2867 struct obj_section
*sect
;
2869 ALL_OBJSECTIONS (objfile
, sect
)
2870 if (section_is_overlay (sect
))
2871 sect
->ovly_mapped
= -1;
2874 /* Function: section_is_mapped (SECTION)
2875 Returns true if section is an overlay, and is currently mapped.
2877 Access to the ovly_mapped flag is restricted to this function, so
2878 that we can do automatic update. If the global flag
2879 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2880 overlay_invalidate_all. If the mapped state of the particular
2881 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2884 section_is_mapped (struct obj_section
*osect
)
2886 struct gdbarch
*gdbarch
;
2888 if (osect
== 0 || !section_is_overlay (osect
))
2891 switch (overlay_debugging
)
2895 return 0; /* overlay debugging off */
2896 case ovly_auto
: /* overlay debugging automatic */
2897 /* Unles there is a gdbarch_overlay_update function,
2898 there's really nothing useful to do here (can't really go auto) */
2899 gdbarch
= get_objfile_arch (osect
->objfile
);
2900 if (gdbarch_overlay_update_p (gdbarch
))
2902 if (overlay_cache_invalid
)
2904 overlay_invalidate_all ();
2905 overlay_cache_invalid
= 0;
2907 if (osect
->ovly_mapped
== -1)
2908 gdbarch_overlay_update (gdbarch
, osect
);
2910 /* fall thru to manual case */
2911 case ovly_on
: /* overlay debugging manual */
2912 return osect
->ovly_mapped
== 1;
2916 /* Function: pc_in_unmapped_range
2917 If PC falls into the lma range of SECTION, return true, else false. */
2920 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
2922 if (section_is_overlay (section
))
2924 bfd
*abfd
= section
->objfile
->obfd
;
2925 asection
*bfd_section
= section
->the_bfd_section
;
2927 /* We assume the LMA is relocated by the same offset as the VMA. */
2928 bfd_vma size
= bfd_get_section_size (bfd_section
);
2929 CORE_ADDR offset
= obj_section_offset (section
);
2931 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
2932 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
2939 /* Function: pc_in_mapped_range
2940 If PC falls into the vma range of SECTION, return true, else false. */
2943 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
2945 if (section_is_overlay (section
))
2947 if (obj_section_addr (section
) <= pc
2948 && pc
< obj_section_endaddr (section
))
2956 /* Return true if the mapped ranges of sections A and B overlap, false
2959 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
2961 CORE_ADDR a_start
= obj_section_addr (a
);
2962 CORE_ADDR a_end
= obj_section_endaddr (a
);
2963 CORE_ADDR b_start
= obj_section_addr (b
);
2964 CORE_ADDR b_end
= obj_section_endaddr (b
);
2966 return (a_start
< b_end
&& b_start
< a_end
);
2969 /* Function: overlay_unmapped_address (PC, SECTION)
2970 Returns the address corresponding to PC in the unmapped (load) range.
2971 May be the same as PC. */
2974 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
2976 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
2978 bfd
*abfd
= section
->objfile
->obfd
;
2979 asection
*bfd_section
= section
->the_bfd_section
;
2981 return pc
+ bfd_section_lma (abfd
, bfd_section
)
2982 - bfd_section_vma (abfd
, bfd_section
);
2988 /* Function: overlay_mapped_address (PC, SECTION)
2989 Returns the address corresponding to PC in the mapped (runtime) range.
2990 May be the same as PC. */
2993 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
2995 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
2997 bfd
*abfd
= section
->objfile
->obfd
;
2998 asection
*bfd_section
= section
->the_bfd_section
;
3000 return pc
+ bfd_section_vma (abfd
, bfd_section
)
3001 - bfd_section_lma (abfd
, bfd_section
);
3008 /* Function: symbol_overlayed_address
3009 Return one of two addresses (relative to the VMA or to the LMA),
3010 depending on whether the section is mapped or not. */
3013 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3015 if (overlay_debugging
)
3017 /* If the symbol has no section, just return its regular address. */
3020 /* If the symbol's section is not an overlay, just return its address */
3021 if (!section_is_overlay (section
))
3023 /* If the symbol's section is mapped, just return its address */
3024 if (section_is_mapped (section
))
3027 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3028 * then return its LOADED address rather than its vma address!!
3030 return overlay_unmapped_address (address
, section
);
3035 /* Function: find_pc_overlay (PC)
3036 Return the best-match overlay section for PC:
3037 If PC matches a mapped overlay section's VMA, return that section.
3038 Else if PC matches an unmapped section's VMA, return that section.
3039 Else if PC matches an unmapped section's LMA, return that section. */
3041 struct obj_section
*
3042 find_pc_overlay (CORE_ADDR pc
)
3044 struct objfile
*objfile
;
3045 struct obj_section
*osect
, *best_match
= NULL
;
3047 if (overlay_debugging
)
3048 ALL_OBJSECTIONS (objfile
, osect
)
3049 if (section_is_overlay (osect
))
3051 if (pc_in_mapped_range (pc
, osect
))
3053 if (section_is_mapped (osect
))
3058 else if (pc_in_unmapped_range (pc
, osect
))
3064 /* Function: find_pc_mapped_section (PC)
3065 If PC falls into the VMA address range of an overlay section that is
3066 currently marked as MAPPED, return that section. Else return NULL. */
3068 struct obj_section
*
3069 find_pc_mapped_section (CORE_ADDR pc
)
3071 struct objfile
*objfile
;
3072 struct obj_section
*osect
;
3074 if (overlay_debugging
)
3075 ALL_OBJSECTIONS (objfile
, osect
)
3076 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3082 /* Function: list_overlays_command
3083 Print a list of mapped sections and their PC ranges */
3086 list_overlays_command (char *args
, int from_tty
)
3089 struct objfile
*objfile
;
3090 struct obj_section
*osect
;
3092 if (overlay_debugging
)
3093 ALL_OBJSECTIONS (objfile
, osect
)
3094 if (section_is_mapped (osect
))
3096 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3101 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3102 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3103 size
= bfd_get_section_size (osect
->the_bfd_section
);
3104 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3106 printf_filtered ("Section %s, loaded at ", name
);
3107 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3108 puts_filtered (" - ");
3109 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3110 printf_filtered (", mapped at ");
3111 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3112 puts_filtered (" - ");
3113 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3114 puts_filtered ("\n");
3119 printf_filtered (_("No sections are mapped.\n"));
3122 /* Function: map_overlay_command
3123 Mark the named section as mapped (ie. residing at its VMA address). */
3126 map_overlay_command (char *args
, int from_tty
)
3128 struct objfile
*objfile
, *objfile2
;
3129 struct obj_section
*sec
, *sec2
;
3131 if (!overlay_debugging
)
3133 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3134 the 'overlay manual' command."));
3136 if (args
== 0 || *args
== 0)
3137 error (_("Argument required: name of an overlay section"));
3139 /* First, find a section matching the user supplied argument */
3140 ALL_OBJSECTIONS (objfile
, sec
)
3141 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3143 /* Now, check to see if the section is an overlay. */
3144 if (!section_is_overlay (sec
))
3145 continue; /* not an overlay section */
3147 /* Mark the overlay as "mapped" */
3148 sec
->ovly_mapped
= 1;
3150 /* Next, make a pass and unmap any sections that are
3151 overlapped by this new section: */
3152 ALL_OBJSECTIONS (objfile2
, sec2
)
3153 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
, sec2
))
3156 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3157 bfd_section_name (objfile
->obfd
,
3158 sec2
->the_bfd_section
));
3159 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
3163 error (_("No overlay section called %s"), args
);
3166 /* Function: unmap_overlay_command
3167 Mark the overlay section as unmapped
3168 (ie. resident in its LMA address range, rather than the VMA range). */
3171 unmap_overlay_command (char *args
, int from_tty
)
3173 struct objfile
*objfile
;
3174 struct obj_section
*sec
;
3176 if (!overlay_debugging
)
3178 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3179 the 'overlay manual' command."));
3181 if (args
== 0 || *args
== 0)
3182 error (_("Argument required: name of an overlay section"));
3184 /* First, find a section matching the user supplied argument */
3185 ALL_OBJSECTIONS (objfile
, sec
)
3186 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3188 if (!sec
->ovly_mapped
)
3189 error (_("Section %s is not mapped"), args
);
3190 sec
->ovly_mapped
= 0;
3193 error (_("No overlay section called %s"), args
);
3196 /* Function: overlay_auto_command
3197 A utility command to turn on overlay debugging.
3198 Possibly this should be done via a set/show command. */
3201 overlay_auto_command (char *args
, int from_tty
)
3203 overlay_debugging
= ovly_auto
;
3204 enable_overlay_breakpoints ();
3206 printf_unfiltered (_("Automatic overlay debugging enabled."));
3209 /* Function: overlay_manual_command
3210 A utility command to turn on overlay debugging.
3211 Possibly this should be done via a set/show command. */
3214 overlay_manual_command (char *args
, int from_tty
)
3216 overlay_debugging
= ovly_on
;
3217 disable_overlay_breakpoints ();
3219 printf_unfiltered (_("Overlay debugging enabled."));
3222 /* Function: overlay_off_command
3223 A utility command to turn on overlay debugging.
3224 Possibly this should be done via a set/show command. */
3227 overlay_off_command (char *args
, int from_tty
)
3229 overlay_debugging
= ovly_off
;
3230 disable_overlay_breakpoints ();
3232 printf_unfiltered (_("Overlay debugging disabled."));
3236 overlay_load_command (char *args
, int from_tty
)
3238 struct gdbarch
*gdbarch
= get_current_arch ();
3240 if (gdbarch_overlay_update_p (gdbarch
))
3241 gdbarch_overlay_update (gdbarch
, NULL
);
3243 error (_("This target does not know how to read its overlay state."));
3246 /* Function: overlay_command
3247 A place-holder for a mis-typed command */
3249 /* Command list chain containing all defined "overlay" subcommands. */
3250 struct cmd_list_element
*overlaylist
;
3253 overlay_command (char *args
, int from_tty
)
3256 ("\"overlay\" must be followed by the name of an overlay command.\n");
3257 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3261 /* Target Overlays for the "Simplest" overlay manager:
3263 This is GDB's default target overlay layer. It works with the
3264 minimal overlay manager supplied as an example by Cygnus. The
3265 entry point is via a function pointer "gdbarch_overlay_update",
3266 so targets that use a different runtime overlay manager can
3267 substitute their own overlay_update function and take over the
3270 The overlay_update function pokes around in the target's data structures
3271 to see what overlays are mapped, and updates GDB's overlay mapping with
3274 In this simple implementation, the target data structures are as follows:
3275 unsigned _novlys; /# number of overlay sections #/
3276 unsigned _ovly_table[_novlys][4] = {
3277 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3278 {..., ..., ..., ...},
3280 unsigned _novly_regions; /# number of overlay regions #/
3281 unsigned _ovly_region_table[_novly_regions][3] = {
3282 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3285 These functions will attempt to update GDB's mappedness state in the
3286 symbol section table, based on the target's mappedness state.
3288 To do this, we keep a cached copy of the target's _ovly_table, and
3289 attempt to detect when the cached copy is invalidated. The main
3290 entry point is "simple_overlay_update(SECT), which looks up SECT in
3291 the cached table and re-reads only the entry for that section from
3292 the target (whenever possible).
3295 /* Cached, dynamically allocated copies of the target data structures: */
3296 static unsigned (*cache_ovly_table
)[4] = 0;
3298 static unsigned (*cache_ovly_region_table
)[3] = 0;
3300 static unsigned cache_novlys
= 0;
3302 static unsigned cache_novly_regions
= 0;
3304 static CORE_ADDR cache_ovly_table_base
= 0;
3306 static CORE_ADDR cache_ovly_region_table_base
= 0;
3310 VMA
, SIZE
, LMA
, MAPPED
3313 /* Throw away the cached copy of _ovly_table */
3315 simple_free_overlay_table (void)
3317 if (cache_ovly_table
)
3318 xfree (cache_ovly_table
);
3320 cache_ovly_table
= NULL
;
3321 cache_ovly_table_base
= 0;
3325 /* Throw away the cached copy of _ovly_region_table */
3327 simple_free_overlay_region_table (void)
3329 if (cache_ovly_region_table
)
3330 xfree (cache_ovly_region_table
);
3331 cache_novly_regions
= 0;
3332 cache_ovly_region_table
= NULL
;
3333 cache_ovly_region_table_base
= 0;
3337 /* Read an array of ints of size SIZE from the target into a local buffer.
3338 Convert to host order. int LEN is number of ints */
3340 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3341 int len
, int size
, enum bfd_endian byte_order
)
3343 /* FIXME (alloca): Not safe if array is very large. */
3344 gdb_byte
*buf
= alloca (len
* size
);
3347 read_memory (memaddr
, buf
, len
* size
);
3348 for (i
= 0; i
< len
; i
++)
3349 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3352 /* Find and grab a copy of the target _ovly_table
3353 (and _novlys, which is needed for the table's size) */
3355 simple_read_overlay_table (void)
3357 struct minimal_symbol
*novlys_msym
, *ovly_table_msym
;
3358 struct gdbarch
*gdbarch
;
3360 enum bfd_endian byte_order
;
3362 simple_free_overlay_table ();
3363 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3366 error (_("Error reading inferior's overlay table: "
3367 "couldn't find `_novlys' variable\n"
3368 "in inferior. Use `overlay manual' mode."));
3372 ovly_table_msym
= lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3373 if (! ovly_table_msym
)
3375 error (_("Error reading inferior's overlay table: couldn't find "
3376 "`_ovly_table' array\n"
3377 "in inferior. Use `overlay manual' mode."));
3381 gdbarch
= get_objfile_arch (msymbol_objfile (ovly_table_msym
));
3382 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3383 byte_order
= gdbarch_byte_order (gdbarch
);
3385 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
),
3388 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3389 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3390 read_target_long_array (cache_ovly_table_base
,
3391 (unsigned int *) cache_ovly_table
,
3392 cache_novlys
* 4, word_size
, byte_order
);
3394 return 1; /* SUCCESS */
3398 /* Find and grab a copy of the target _ovly_region_table
3399 (and _novly_regions, which is needed for the table's size) */
3401 simple_read_overlay_region_table (void)
3403 struct minimal_symbol
*msym
;
3404 struct gdbarch
*gdbarch
;
3406 enum bfd_endian byte_order
;
3408 simple_free_overlay_region_table ();
3409 msym
= lookup_minimal_symbol ("_novly_regions", NULL
, NULL
);
3411 return 0; /* failure */
3413 gdbarch
= get_objfile_arch (msymbol_objfile (msym
));
3414 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3415 byte_order
= gdbarch_byte_order (gdbarch
);
3417 cache_novly_regions
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
),
3420 cache_ovly_region_table
= (void *) xmalloc (cache_novly_regions
* 12);
3421 if (cache_ovly_region_table
!= NULL
)
3423 msym
= lookup_minimal_symbol ("_ovly_region_table", NULL
, NULL
);
3426 cache_ovly_region_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3427 read_target_long_array (cache_ovly_region_table_base
,
3428 (unsigned int *) cache_ovly_region_table
,
3429 cache_novly_regions
* 3,
3430 word_size
, byte_order
);
3433 return 0; /* failure */
3436 return 0; /* failure */
3437 return 1; /* SUCCESS */
3441 /* Function: simple_overlay_update_1
3442 A helper function for simple_overlay_update. Assuming a cached copy
3443 of _ovly_table exists, look through it to find an entry whose vma,
3444 lma and size match those of OSECT. Re-read the entry and make sure
3445 it still matches OSECT (else the table may no longer be valid).
3446 Set OSECT's mapped state to match the entry. Return: 1 for
3447 success, 0 for failure. */
3450 simple_overlay_update_1 (struct obj_section
*osect
)
3453 bfd
*obfd
= osect
->objfile
->obfd
;
3454 asection
*bsect
= osect
->the_bfd_section
;
3455 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3456 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3457 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3459 size
= bfd_get_section_size (osect
->the_bfd_section
);
3460 for (i
= 0; i
< cache_novlys
; i
++)
3461 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3462 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3463 /* && cache_ovly_table[i][SIZE] == size */ )
3465 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3466 (unsigned int *) cache_ovly_table
[i
],
3467 4, word_size
, byte_order
);
3468 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3469 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3470 /* && cache_ovly_table[i][SIZE] == size */ )
3472 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3475 else /* Warning! Warning! Target's ovly table has changed! */
3481 /* Function: simple_overlay_update
3482 If OSECT is NULL, then update all sections' mapped state
3483 (after re-reading the entire target _ovly_table).
3484 If OSECT is non-NULL, then try to find a matching entry in the
3485 cached ovly_table and update only OSECT's mapped state.
3486 If a cached entry can't be found or the cache isn't valid, then
3487 re-read the entire cache, and go ahead and update all sections. */
3490 simple_overlay_update (struct obj_section
*osect
)
3492 struct objfile
*objfile
;
3494 /* Were we given an osect to look up? NULL means do all of them. */
3496 /* Have we got a cached copy of the target's overlay table? */
3497 if (cache_ovly_table
!= NULL
)
3498 /* Does its cached location match what's currently in the symtab? */
3499 if (cache_ovly_table_base
==
3500 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL
, NULL
)))
3501 /* Then go ahead and try to look up this single section in the cache */
3502 if (simple_overlay_update_1 (osect
))
3503 /* Found it! We're done. */
3506 /* Cached table no good: need to read the entire table anew.
3507 Or else we want all the sections, in which case it's actually
3508 more efficient to read the whole table in one block anyway. */
3510 if (! simple_read_overlay_table ())
3513 /* Now may as well update all sections, even if only one was requested. */
3514 ALL_OBJSECTIONS (objfile
, osect
)
3515 if (section_is_overlay (osect
))
3518 bfd
*obfd
= osect
->objfile
->obfd
;
3519 asection
*bsect
= osect
->the_bfd_section
;
3521 size
= bfd_get_section_size (bsect
);
3522 for (i
= 0; i
< cache_novlys
; i
++)
3523 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3524 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3525 /* && cache_ovly_table[i][SIZE] == size */ )
3526 { /* obj_section matches i'th entry in ovly_table */
3527 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3528 break; /* finished with inner for loop: break out */
3533 /* Set the output sections and output offsets for section SECTP in
3534 ABFD. The relocation code in BFD will read these offsets, so we
3535 need to be sure they're initialized. We map each section to itself,
3536 with no offset; this means that SECTP->vma will be honored. */
3539 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3541 sectp
->output_section
= sectp
;
3542 sectp
->output_offset
= 0;
3545 /* Default implementation for sym_relocate. */
3549 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3552 bfd
*abfd
= objfile
->obfd
;
3554 /* We're only interested in sections with relocation
3556 if ((sectp
->flags
& SEC_RELOC
) == 0)
3559 /* We will handle section offsets properly elsewhere, so relocate as if
3560 all sections begin at 0. */
3561 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3563 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3566 /* Relocate the contents of a debug section SECTP in ABFD. The
3567 contents are stored in BUF if it is non-NULL, or returned in a
3568 malloc'd buffer otherwise.
3570 For some platforms and debug info formats, shared libraries contain
3571 relocations against the debug sections (particularly for DWARF-2;
3572 one affected platform is PowerPC GNU/Linux, although it depends on
3573 the version of the linker in use). Also, ELF object files naturally
3574 have unresolved relocations for their debug sections. We need to apply
3575 the relocations in order to get the locations of symbols correct.
3576 Another example that may require relocation processing, is the
3577 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3581 symfile_relocate_debug_section (struct objfile
*objfile
,
3582 asection
*sectp
, bfd_byte
*buf
)
3584 gdb_assert (objfile
->sf
->sym_relocate
);
3586 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3589 struct symfile_segment_data
*
3590 get_symfile_segment_data (bfd
*abfd
)
3592 struct sym_fns
*sf
= find_sym_fns (abfd
);
3597 return sf
->sym_segments (abfd
);
3601 free_symfile_segment_data (struct symfile_segment_data
*data
)
3603 xfree (data
->segment_bases
);
3604 xfree (data
->segment_sizes
);
3605 xfree (data
->segment_info
);
3611 - DATA, containing segment addresses from the object file ABFD, and
3612 the mapping from ABFD's sections onto the segments that own them,
3614 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3615 segment addresses reported by the target,
3616 store the appropriate offsets for each section in OFFSETS.
3618 If there are fewer entries in SEGMENT_BASES than there are segments
3619 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3621 If there are more entries, then ignore the extra. The target may
3622 not be able to distinguish between an empty data segment and a
3623 missing data segment; a missing text segment is less plausible. */
3625 symfile_map_offsets_to_segments (bfd
*abfd
, struct symfile_segment_data
*data
,
3626 struct section_offsets
*offsets
,
3627 int num_segment_bases
,
3628 const CORE_ADDR
*segment_bases
)
3633 /* It doesn't make sense to call this function unless you have some
3634 segment base addresses. */
3635 gdb_assert (num_segment_bases
> 0);
3637 /* If we do not have segment mappings for the object file, we
3638 can not relocate it by segments. */
3639 gdb_assert (data
!= NULL
);
3640 gdb_assert (data
->num_segments
> 0);
3642 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3644 int which
= data
->segment_info
[i
];
3646 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
3648 /* Don't bother computing offsets for sections that aren't
3649 loaded as part of any segment. */
3653 /* Use the last SEGMENT_BASES entry as the address of any extra
3654 segments mentioned in DATA->segment_info. */
3655 if (which
> num_segment_bases
)
3656 which
= num_segment_bases
;
3658 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
3659 - data
->segment_bases
[which
- 1]);
3666 symfile_find_segment_sections (struct objfile
*objfile
)
3668 bfd
*abfd
= objfile
->obfd
;
3671 struct symfile_segment_data
*data
;
3673 data
= get_symfile_segment_data (objfile
->obfd
);
3677 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
3679 free_symfile_segment_data (data
);
3683 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3685 int which
= data
->segment_info
[i
];
3689 if (objfile
->sect_index_text
== -1)
3690 objfile
->sect_index_text
= sect
->index
;
3692 if (objfile
->sect_index_rodata
== -1)
3693 objfile
->sect_index_rodata
= sect
->index
;
3695 else if (which
== 2)
3697 if (objfile
->sect_index_data
== -1)
3698 objfile
->sect_index_data
= sect
->index
;
3700 if (objfile
->sect_index_bss
== -1)
3701 objfile
->sect_index_bss
= sect
->index
;
3705 free_symfile_segment_data (data
);
3709 _initialize_symfile (void)
3711 struct cmd_list_element
*c
;
3713 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3714 Load symbol table from executable file FILE.\n\
3715 The `file' command can also load symbol tables, as well as setting the file\n\
3716 to execute."), &cmdlist
);
3717 set_cmd_completer (c
, filename_completer
);
3719 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3720 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3721 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3722 ADDR is the starting address of the file's text.\n\
3723 The optional arguments are section-name section-address pairs and\n\
3724 should be specified if the data and bss segments are not contiguous\n\
3725 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3727 set_cmd_completer (c
, filename_completer
);
3729 c
= add_cmd ("load", class_files
, load_command
, _("\
3730 Dynamically load FILE into the running program, and record its symbols\n\
3731 for access from GDB.\n\
3732 A load OFFSET may also be given."), &cmdlist
);
3733 set_cmd_completer (c
, filename_completer
);
3735 add_setshow_boolean_cmd ("symbol-reloading", class_support
,
3736 &symbol_reloading
, _("\
3737 Set dynamic symbol table reloading multiple times in one run."), _("\
3738 Show dynamic symbol table reloading multiple times in one run."), NULL
,
3740 show_symbol_reloading
,
3741 &setlist
, &showlist
);
3743 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3744 _("Commands for debugging overlays."), &overlaylist
,
3745 "overlay ", 0, &cmdlist
);
3747 add_com_alias ("ovly", "overlay", class_alias
, 1);
3748 add_com_alias ("ov", "overlay", class_alias
, 1);
3750 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3751 _("Assert that an overlay section is mapped."), &overlaylist
);
3753 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3754 _("Assert that an overlay section is unmapped."), &overlaylist
);
3756 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3757 _("List mappings of overlay sections."), &overlaylist
);
3759 add_cmd ("manual", class_support
, overlay_manual_command
,
3760 _("Enable overlay debugging."), &overlaylist
);
3761 add_cmd ("off", class_support
, overlay_off_command
,
3762 _("Disable overlay debugging."), &overlaylist
);
3763 add_cmd ("auto", class_support
, overlay_auto_command
,
3764 _("Enable automatic overlay debugging."), &overlaylist
);
3765 add_cmd ("load-target", class_support
, overlay_load_command
,
3766 _("Read the overlay mapping state from the target."), &overlaylist
);
3768 /* Filename extension to source language lookup table: */
3769 init_filename_language_table ();
3770 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3772 Set mapping between filename extension and source language."), _("\
3773 Show mapping between filename extension and source language."), _("\
3774 Usage: set extension-language .foo bar"),
3775 set_ext_lang_command
,
3777 &setlist
, &showlist
);
3779 add_info ("extensions", info_ext_lang_command
,
3780 _("All filename extensions associated with a source language."));
3782 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3783 &debug_file_directory
, _("\
3784 Set the directories where separate debug symbols are searched for."), _("\
3785 Show the directories where separate debug symbols are searched for."), _("\
3786 Separate debug symbols are first searched for in the same\n\
3787 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3788 and lastly at the path of the directory of the binary with\n\
3789 each global debug-file-directory component prepended."),
3791 show_debug_file_directory
,
3792 &setlist
, &showlist
);