1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
5 Free Software Foundation, Inc.
7 Contributed by Cygnus Support, using pieces from other GDB modules.
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>. */
25 #include "arch-utils.h"
37 #include "breakpoint.h"
39 #include "complaints.h"
43 #include "filenames.h" /* for DOSish file names */
44 #include "gdb-stabs.h"
45 #include "gdb_obstack.h"
46 #include "completer.h"
49 #include "readline/readline.h"
50 #include "gdb_assert.h"
54 #include "parser-defs.h"
60 #include <sys/types.h>
62 #include "gdb_string.h"
70 int (*deprecated_ui_load_progress_hook
) (const char *section
, 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 */
90 static void load_command (char *, int);
92 static void symbol_file_add_main_1 (char *args
, int from_tty
, int flags
);
94 static void add_symbol_file_command (char *, int);
96 bfd
*symfile_bfd_open (char *);
98 int get_section_index (struct objfile
*, char *);
100 static const struct sym_fns
*find_sym_fns (bfd
*);
102 static void decrement_reading_symtab (void *);
104 static void overlay_invalidate_all (void);
106 void list_overlays_command (char *, int);
108 void map_overlay_command (char *, int);
110 void unmap_overlay_command (char *, int);
112 static void overlay_auto_command (char *, int);
114 static void overlay_manual_command (char *, int);
116 static void overlay_off_command (char *, int);
118 static void overlay_load_command (char *, int);
120 static void overlay_command (char *, int);
122 static void simple_free_overlay_table (void);
124 static void read_target_long_array (CORE_ADDR
, unsigned int *, int, int,
127 static int simple_read_overlay_table (void);
129 static int simple_overlay_update_1 (struct obj_section
*);
131 static void add_filename_language (char *ext
, enum language lang
);
133 static void info_ext_lang_command (char *args
, int from_tty
);
135 static void init_filename_language_table (void);
137 static void symfile_find_segment_sections (struct objfile
*objfile
);
139 void _initialize_symfile (void);
141 /* List of all available sym_fns. On gdb startup, each object file reader
142 calls add_symtab_fns() to register information on each format it is
145 typedef const struct sym_fns
*sym_fns_ptr
;
146 DEF_VEC_P (sym_fns_ptr
);
148 static VEC (sym_fns_ptr
) *symtab_fns
= NULL
;
150 /* Flag for whether user will be reloading symbols multiple times.
151 Defaults to ON for VxWorks, otherwise OFF. */
153 #ifdef SYMBOL_RELOADING_DEFAULT
154 int symbol_reloading
= SYMBOL_RELOADING_DEFAULT
;
156 int symbol_reloading
= 0;
159 show_symbol_reloading (struct ui_file
*file
, int from_tty
,
160 struct cmd_list_element
*c
, const char *value
)
162 fprintf_filtered (file
, _("\
163 Dynamic symbol table reloading multiple times in one run is %s.\n"),
167 /* If non-zero, shared library symbols will be added automatically
168 when the inferior is created, new libraries are loaded, or when
169 attaching to the inferior. This is almost always what users will
170 want to have happen; but for very large programs, the startup time
171 will be excessive, and so if this is a problem, the user can clear
172 this flag and then add the shared library symbols as needed. Note
173 that there is a potential for confusion, since if the shared
174 library symbols are not loaded, commands like "info fun" will *not*
175 report all the functions that are actually present. */
177 int auto_solib_add
= 1;
179 /* For systems that support it, a threshold size in megabytes. If
180 automatically adding a new library's symbol table to those already
181 known to the debugger would cause the total shared library symbol
182 size to exceed this threshhold, then the shlib's symbols are not
183 added. The threshold is ignored if the user explicitly asks for a
184 shlib to be added, such as when using the "sharedlibrary"
187 int auto_solib_limit
;
190 /* Make a null terminated copy of the string at PTR with SIZE characters in
191 the obstack pointed to by OBSTACKP . Returns the address of the copy.
192 Note that the string at PTR does not have to be null terminated, I.E. it
193 may be part of a larger string and we are only saving a substring. */
196 obsavestring (const char *ptr
, int size
, struct obstack
*obstackp
)
198 char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
199 /* Open-coded memcpy--saves function call time. These strings are usually
200 short. FIXME: Is this really still true with a compiler that can
203 const char *p1
= ptr
;
205 const char *end
= ptr
+ size
;
214 /* Concatenate NULL terminated variable argument list of `const char *' strings;
215 return the new string. Space is found in the OBSTACKP. Argument list must
216 be terminated by a sentinel expression `(char *) NULL'. */
219 obconcat (struct obstack
*obstackp
, ...)
223 va_start (ap
, obstackp
);
226 const char *s
= va_arg (ap
, const char *);
231 obstack_grow_str (obstackp
, s
);
234 obstack_1grow (obstackp
, 0);
236 return obstack_finish (obstackp
);
239 /* True if we are reading a symbol table. */
241 int currently_reading_symtab
= 0;
244 decrement_reading_symtab (void *dummy
)
246 currently_reading_symtab
--;
249 /* Increment currently_reading_symtab and return a cleanup that can be
250 used to decrement it. */
252 increment_reading_symtab (void)
254 ++currently_reading_symtab
;
255 return make_cleanup (decrement_reading_symtab
, NULL
);
258 /* Remember the lowest-addressed loadable section we've seen.
259 This function is called via bfd_map_over_sections.
261 In case of equal vmas, the section with the largest size becomes the
262 lowest-addressed loadable section.
264 If the vmas and sizes are equal, the last section is considered the
265 lowest-addressed loadable section. */
268 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
270 asection
**lowest
= (asection
**) obj
;
272 if (0 == (bfd_get_section_flags (abfd
, sect
) & (SEC_ALLOC
| SEC_LOAD
)))
275 *lowest
= sect
; /* First loadable section */
276 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
277 *lowest
= sect
; /* A lower loadable section */
278 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
279 && (bfd_section_size (abfd
, (*lowest
))
280 <= bfd_section_size (abfd
, sect
)))
284 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
286 struct section_addr_info
*
287 alloc_section_addr_info (size_t num_sections
)
289 struct section_addr_info
*sap
;
292 size
= (sizeof (struct section_addr_info
)
293 + sizeof (struct other_sections
) * (num_sections
- 1));
294 sap
= (struct section_addr_info
*) xmalloc (size
);
295 memset (sap
, 0, size
);
296 sap
->num_sections
= num_sections
;
301 /* Build (allocate and populate) a section_addr_info struct from
302 an existing section table. */
304 extern struct section_addr_info
*
305 build_section_addr_info_from_section_table (const struct target_section
*start
,
306 const struct target_section
*end
)
308 struct section_addr_info
*sap
;
309 const struct target_section
*stp
;
312 sap
= alloc_section_addr_info (end
- start
);
314 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
316 if (bfd_get_section_flags (stp
->bfd
,
317 stp
->the_bfd_section
) & (SEC_ALLOC
| SEC_LOAD
)
318 && oidx
< end
- start
)
320 sap
->other
[oidx
].addr
= stp
->addr
;
321 sap
->other
[oidx
].name
322 = xstrdup (bfd_section_name (stp
->bfd
, stp
->the_bfd_section
));
323 sap
->other
[oidx
].sectindex
= stp
->the_bfd_section
->index
;
331 /* Create a section_addr_info from section offsets in ABFD. */
333 static struct section_addr_info
*
334 build_section_addr_info_from_bfd (bfd
*abfd
)
336 struct section_addr_info
*sap
;
338 struct bfd_section
*sec
;
340 sap
= alloc_section_addr_info (bfd_count_sections (abfd
));
341 for (i
= 0, sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
342 if (bfd_get_section_flags (abfd
, sec
) & (SEC_ALLOC
| SEC_LOAD
))
344 sap
->other
[i
].addr
= bfd_get_section_vma (abfd
, sec
);
345 sap
->other
[i
].name
= xstrdup (bfd_get_section_name (abfd
, sec
));
346 sap
->other
[i
].sectindex
= sec
->index
;
352 /* Create a section_addr_info from section offsets in OBJFILE. */
354 struct section_addr_info
*
355 build_section_addr_info_from_objfile (const struct objfile
*objfile
)
357 struct section_addr_info
*sap
;
360 /* Before reread_symbols gets rewritten it is not safe to call:
361 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
363 sap
= build_section_addr_info_from_bfd (objfile
->obfd
);
364 for (i
= 0; i
< sap
->num_sections
&& sap
->other
[i
].name
; i
++)
366 int sectindex
= sap
->other
[i
].sectindex
;
368 sap
->other
[i
].addr
+= objfile
->section_offsets
->offsets
[sectindex
];
373 /* Free all memory allocated by build_section_addr_info_from_section_table. */
376 free_section_addr_info (struct section_addr_info
*sap
)
380 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
381 if (sap
->other
[idx
].name
)
382 xfree (sap
->other
[idx
].name
);
387 /* Initialize OBJFILE's sect_index_* members. */
389 init_objfile_sect_indices (struct objfile
*objfile
)
394 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
396 objfile
->sect_index_text
= sect
->index
;
398 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
400 objfile
->sect_index_data
= sect
->index
;
402 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
404 objfile
->sect_index_bss
= sect
->index
;
406 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
408 objfile
->sect_index_rodata
= sect
->index
;
410 /* This is where things get really weird... We MUST have valid
411 indices for the various sect_index_* members or gdb will abort.
412 So if for example, there is no ".text" section, we have to
413 accomodate that. First, check for a file with the standard
414 one or two segments. */
416 symfile_find_segment_sections (objfile
);
418 /* Except when explicitly adding symbol files at some address,
419 section_offsets contains nothing but zeros, so it doesn't matter
420 which slot in section_offsets the individual sect_index_* members
421 index into. So if they are all zero, it is safe to just point
422 all the currently uninitialized indices to the first slot. But
423 beware: if this is the main executable, it may be relocated
424 later, e.g. by the remote qOffsets packet, and then this will
425 be wrong! That's why we try segments first. */
427 for (i
= 0; i
< objfile
->num_sections
; i
++)
429 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
434 if (i
== objfile
->num_sections
)
436 if (objfile
->sect_index_text
== -1)
437 objfile
->sect_index_text
= 0;
438 if (objfile
->sect_index_data
== -1)
439 objfile
->sect_index_data
= 0;
440 if (objfile
->sect_index_bss
== -1)
441 objfile
->sect_index_bss
= 0;
442 if (objfile
->sect_index_rodata
== -1)
443 objfile
->sect_index_rodata
= 0;
447 /* The arguments to place_section. */
449 struct place_section_arg
451 struct section_offsets
*offsets
;
455 /* Find a unique offset to use for loadable section SECT if
456 the user did not provide an offset. */
459 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
461 struct place_section_arg
*arg
= obj
;
462 CORE_ADDR
*offsets
= arg
->offsets
->offsets
, start_addr
;
464 ULONGEST align
= ((ULONGEST
) 1) << bfd_get_section_alignment (abfd
, sect
);
466 /* We are only interested in allocated sections. */
467 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
470 /* If the user specified an offset, honor it. */
471 if (offsets
[sect
->index
] != 0)
474 /* Otherwise, let's try to find a place for the section. */
475 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
482 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
484 int indx
= cur_sec
->index
;
486 /* We don't need to compare against ourself. */
490 /* We can only conflict with allocated sections. */
491 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
494 /* If the section offset is 0, either the section has not been placed
495 yet, or it was the lowest section placed (in which case LOWEST
496 will be past its end). */
497 if (offsets
[indx
] == 0)
500 /* If this section would overlap us, then we must move up. */
501 if (start_addr
+ bfd_get_section_size (sect
) > offsets
[indx
]
502 && start_addr
< offsets
[indx
] + bfd_get_section_size (cur_sec
))
504 start_addr
= offsets
[indx
] + bfd_get_section_size (cur_sec
);
505 start_addr
= (start_addr
+ align
- 1) & -align
;
510 /* Otherwise, we appear to be OK. So far. */
515 offsets
[sect
->index
] = start_addr
;
516 arg
->lowest
= start_addr
+ bfd_get_section_size (sect
);
519 /* Store struct section_addr_info as prepared (made relative and with SECTINDEX
520 filled-in) by addr_info_make_relative into SECTION_OFFSETS of NUM_SECTIONS
524 relative_addr_info_to_section_offsets (struct section_offsets
*section_offsets
,
526 struct section_addr_info
*addrs
)
530 memset (section_offsets
, 0, SIZEOF_N_SECTION_OFFSETS (num_sections
));
532 /* Now calculate offsets for section that were specified by the caller. */
533 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
535 struct other_sections
*osp
;
537 osp
= &addrs
->other
[i
];
541 /* Record all sections in offsets */
542 /* The section_offsets in the objfile are here filled in using
544 section_offsets
->offsets
[osp
->sectindex
] = osp
->addr
;
548 /* Transform section name S for a name comparison. prelink can split section
549 `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly
550 prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address
551 of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss'
552 (`.sbss') section has invalid (increased) virtual address. */
555 addr_section_name (const char *s
)
557 if (strcmp (s
, ".dynbss") == 0)
559 if (strcmp (s
, ".sdynbss") == 0)
565 /* qsort comparator for addrs_section_sort. Sort entries in ascending order by
566 their (name, sectindex) pair. sectindex makes the sort by name stable. */
569 addrs_section_compar (const void *ap
, const void *bp
)
571 const struct other_sections
*a
= *((struct other_sections
**) ap
);
572 const struct other_sections
*b
= *((struct other_sections
**) bp
);
573 int retval
, a_idx
, b_idx
;
575 retval
= strcmp (addr_section_name (a
->name
), addr_section_name (b
->name
));
579 /* SECTINDEX is undefined iff ADDR is zero. */
580 a_idx
= a
->addr
== 0 ? 0 : a
->sectindex
;
581 b_idx
= b
->addr
== 0 ? 0 : b
->sectindex
;
582 return a_idx
- b_idx
;
585 /* Provide sorted array of pointers to sections of ADDRS. The array is
586 terminated by NULL. Caller is responsible to call xfree for it. */
588 static struct other_sections
**
589 addrs_section_sort (struct section_addr_info
*addrs
)
591 struct other_sections
**array
;
594 /* `+ 1' for the NULL terminator. */
595 array
= xmalloc (sizeof (*array
) * (addrs
->num_sections
+ 1));
596 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
597 array
[i
] = &addrs
->other
[i
];
600 qsort (array
, i
, sizeof (*array
), addrs_section_compar
);
605 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
606 also SECTINDEXes specific to ABFD there. This function can be used to
607 rebase ADDRS to start referencing different BFD than before. */
610 addr_info_make_relative (struct section_addr_info
*addrs
, bfd
*abfd
)
612 asection
*lower_sect
;
613 CORE_ADDR lower_offset
;
615 struct cleanup
*my_cleanup
;
616 struct section_addr_info
*abfd_addrs
;
617 struct other_sections
**addrs_sorted
, **abfd_addrs_sorted
;
618 struct other_sections
**addrs_to_abfd_addrs
;
620 /* Find lowest loadable section to be used as starting point for
621 continguous sections. */
623 bfd_map_over_sections (abfd
, find_lowest_section
, &lower_sect
);
624 if (lower_sect
== NULL
)
626 warning (_("no loadable sections found in added symbol-file %s"),
627 bfd_get_filename (abfd
));
631 lower_offset
= bfd_section_vma (bfd_get_filename (abfd
), lower_sect
);
633 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
634 in ABFD. Section names are not unique - there can be multiple sections of
635 the same name. Also the sections of the same name do not have to be
636 adjacent to each other. Some sections may be present only in one of the
637 files. Even sections present in both files do not have to be in the same
640 Use stable sort by name for the sections in both files. Then linearly
641 scan both lists matching as most of the entries as possible. */
643 addrs_sorted
= addrs_section_sort (addrs
);
644 my_cleanup
= make_cleanup (xfree
, addrs_sorted
);
646 abfd_addrs
= build_section_addr_info_from_bfd (abfd
);
647 make_cleanup_free_section_addr_info (abfd_addrs
);
648 abfd_addrs_sorted
= addrs_section_sort (abfd_addrs
);
649 make_cleanup (xfree
, abfd_addrs_sorted
);
651 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and ABFD_ADDRS_SORTED. */
653 addrs_to_abfd_addrs
= xzalloc (sizeof (*addrs_to_abfd_addrs
)
654 * addrs
->num_sections
);
655 make_cleanup (xfree
, addrs_to_abfd_addrs
);
657 while (*addrs_sorted
)
659 const char *sect_name
= addr_section_name ((*addrs_sorted
)->name
);
661 while (*abfd_addrs_sorted
662 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
666 if (*abfd_addrs_sorted
667 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
672 /* Make the found item directly addressable from ADDRS. */
673 index_in_addrs
= *addrs_sorted
- addrs
->other
;
674 gdb_assert (addrs_to_abfd_addrs
[index_in_addrs
] == NULL
);
675 addrs_to_abfd_addrs
[index_in_addrs
] = *abfd_addrs_sorted
;
677 /* Never use the same ABFD entry twice. */
684 /* Calculate offsets for the loadable sections.
685 FIXME! Sections must be in order of increasing loadable section
686 so that contiguous sections can use the lower-offset!!!
688 Adjust offsets if the segments are not contiguous.
689 If the section is contiguous, its offset should be set to
690 the offset of the highest loadable section lower than it
691 (the loadable section directly below it in memory).
692 this_offset = lower_offset = lower_addr - lower_orig_addr */
694 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
696 struct other_sections
*sect
= addrs_to_abfd_addrs
[i
];
700 /* This is the index used by BFD. */
701 addrs
->other
[i
].sectindex
= sect
->sectindex
;
703 if (addrs
->other
[i
].addr
!= 0)
705 addrs
->other
[i
].addr
-= sect
->addr
;
706 lower_offset
= addrs
->other
[i
].addr
;
709 addrs
->other
[i
].addr
= lower_offset
;
713 /* addr_section_name transformation is not used for SECT_NAME. */
714 const char *sect_name
= addrs
->other
[i
].name
;
716 /* This section does not exist in ABFD, which is normally
717 unexpected and we want to issue a warning.
719 However, the ELF prelinker does create a few sections which are
720 marked in the main executable as loadable (they are loaded in
721 memory from the DYNAMIC segment) and yet are not present in
722 separate debug info files. This is fine, and should not cause
723 a warning. Shared libraries contain just the section
724 ".gnu.liblist" but it is not marked as loadable there. There is
725 no other way to identify them than by their name as the sections
726 created by prelink have no special flags.
728 For the sections `.bss' and `.sbss' see addr_section_name. */
730 if (!(strcmp (sect_name
, ".gnu.liblist") == 0
731 || strcmp (sect_name
, ".gnu.conflict") == 0
732 || (strcmp (sect_name
, ".bss") == 0
734 && strcmp (addrs
->other
[i
- 1].name
, ".dynbss") == 0
735 && addrs_to_abfd_addrs
[i
- 1] != NULL
)
736 || (strcmp (sect_name
, ".sbss") == 0
738 && strcmp (addrs
->other
[i
- 1].name
, ".sdynbss") == 0
739 && addrs_to_abfd_addrs
[i
- 1] != NULL
)))
740 warning (_("section %s not found in %s"), sect_name
,
741 bfd_get_filename (abfd
));
743 addrs
->other
[i
].addr
= 0;
745 /* SECTINDEX is invalid if ADDR is zero. */
749 do_cleanups (my_cleanup
);
752 /* Parse the user's idea of an offset for dynamic linking, into our idea
753 of how to represent it for fast symbol reading. This is the default
754 version of the sym_fns.sym_offsets function for symbol readers that
755 don't need to do anything special. It allocates a section_offsets table
756 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
759 default_symfile_offsets (struct objfile
*objfile
,
760 struct section_addr_info
*addrs
)
762 objfile
->num_sections
= bfd_count_sections (objfile
->obfd
);
763 objfile
->section_offsets
= (struct section_offsets
*)
764 obstack_alloc (&objfile
->objfile_obstack
,
765 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
766 relative_addr_info_to_section_offsets (objfile
->section_offsets
,
767 objfile
->num_sections
, addrs
);
769 /* For relocatable files, all loadable sections will start at zero.
770 The zero is meaningless, so try to pick arbitrary addresses such
771 that no loadable sections overlap. This algorithm is quadratic,
772 but the number of sections in a single object file is generally
774 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
776 struct place_section_arg arg
;
777 bfd
*abfd
= objfile
->obfd
;
780 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
781 /* We do not expect this to happen; just skip this step if the
782 relocatable file has a section with an assigned VMA. */
783 if (bfd_section_vma (abfd
, cur_sec
) != 0)
788 CORE_ADDR
*offsets
= objfile
->section_offsets
->offsets
;
790 /* Pick non-overlapping offsets for sections the user did not
792 arg
.offsets
= objfile
->section_offsets
;
794 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
796 /* Correctly filling in the section offsets is not quite
797 enough. Relocatable files have two properties that
798 (most) shared objects do not:
800 - Their debug information will contain relocations. Some
801 shared libraries do also, but many do not, so this can not
804 - If there are multiple code sections they will be loaded
805 at different relative addresses in memory than they are
806 in the objfile, since all sections in the file will start
809 Because GDB has very limited ability to map from an
810 address in debug info to the correct code section,
811 it relies on adding SECT_OFF_TEXT to things which might be
812 code. If we clear all the section offsets, and set the
813 section VMAs instead, then symfile_relocate_debug_section
814 will return meaningful debug information pointing at the
817 GDB has too many different data structures for section
818 addresses - a bfd, objfile, and so_list all have section
819 tables, as does exec_ops. Some of these could probably
822 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
823 cur_sec
= cur_sec
->next
)
825 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
828 bfd_set_section_vma (abfd
, cur_sec
, offsets
[cur_sec
->index
]);
829 exec_set_section_address (bfd_get_filename (abfd
), cur_sec
->index
,
830 offsets
[cur_sec
->index
]);
831 offsets
[cur_sec
->index
] = 0;
836 /* Remember the bfd indexes for the .text, .data, .bss and
838 init_objfile_sect_indices (objfile
);
842 /* Divide the file into segments, which are individual relocatable units.
843 This is the default version of the sym_fns.sym_segments function for
844 symbol readers that do not have an explicit representation of segments.
845 It assumes that object files do not have segments, and fully linked
846 files have a single segment. */
848 struct symfile_segment_data
*
849 default_symfile_segments (bfd
*abfd
)
853 struct symfile_segment_data
*data
;
856 /* Relocatable files contain enough information to position each
857 loadable section independently; they should not be relocated
859 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
862 /* Make sure there is at least one loadable section in the file. */
863 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
865 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
873 low
= bfd_get_section_vma (abfd
, sect
);
874 high
= low
+ bfd_get_section_size (sect
);
876 data
= XZALLOC (struct symfile_segment_data
);
877 data
->num_segments
= 1;
878 data
->segment_bases
= XCALLOC (1, CORE_ADDR
);
879 data
->segment_sizes
= XCALLOC (1, CORE_ADDR
);
881 num_sections
= bfd_count_sections (abfd
);
882 data
->segment_info
= XCALLOC (num_sections
, int);
884 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
888 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
891 vma
= bfd_get_section_vma (abfd
, sect
);
894 if (vma
+ bfd_get_section_size (sect
) > high
)
895 high
= vma
+ bfd_get_section_size (sect
);
897 data
->segment_info
[i
] = 1;
900 data
->segment_bases
[0] = low
;
901 data
->segment_sizes
[0] = high
- low
;
906 /* Process a symbol file, as either the main file or as a dynamically
909 OBJFILE is where the symbols are to be read from.
911 ADDRS is the list of section load addresses. If the user has given
912 an 'add-symbol-file' command, then this is the list of offsets and
913 addresses he or she provided as arguments to the command; or, if
914 we're handling a shared library, these are the actual addresses the
915 sections are loaded at, according to the inferior's dynamic linker
916 (as gleaned by GDB's shared library code). We convert each address
917 into an offset from the section VMA's as it appears in the object
918 file, and then call the file's sym_offsets function to convert this
919 into a format-specific offset table --- a `struct section_offsets'.
920 If ADDRS is non-zero, OFFSETS must be zero.
922 OFFSETS is a table of section offsets already in the right
923 format-specific representation. NUM_OFFSETS is the number of
924 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
925 assume this is the proper table the call to sym_offsets described
926 above would produce. Instead of calling sym_offsets, we just dump
927 it right into objfile->section_offsets. (When we're re-reading
928 symbols from an objfile, we don't have the original load address
929 list any more; all we have is the section offset table.) If
930 OFFSETS is non-zero, ADDRS must be zero.
932 ADD_FLAGS encodes verbosity level, whether this is main symbol or
933 an extra symbol file such as dynamically loaded code, and wether
934 breakpoint reset should be deferred. */
937 syms_from_objfile (struct objfile
*objfile
,
938 struct section_addr_info
*addrs
,
939 struct section_offsets
*offsets
,
943 struct section_addr_info
*local_addr
= NULL
;
944 struct cleanup
*old_chain
;
945 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
947 gdb_assert (! (addrs
&& offsets
));
949 init_entry_point_info (objfile
);
950 objfile
->sf
= find_sym_fns (objfile
->obfd
);
952 if (objfile
->sf
== NULL
)
953 return; /* No symbols. */
955 /* Make sure that partially constructed symbol tables will be cleaned up
956 if an error occurs during symbol reading. */
957 old_chain
= make_cleanup_free_objfile (objfile
);
959 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
960 list. We now establish the convention that an addr of zero means
961 no load address was specified. */
962 if (! addrs
&& ! offsets
)
965 = alloc_section_addr_info (bfd_count_sections (objfile
->obfd
));
966 make_cleanup (xfree
, local_addr
);
970 /* Now either addrs or offsets is non-zero. */
974 /* We will modify the main symbol table, make sure that all its users
975 will be cleaned up if an error occurs during symbol reading. */
976 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
978 /* Since no error yet, throw away the old symbol table. */
980 if (symfile_objfile
!= NULL
)
982 free_objfile (symfile_objfile
);
983 gdb_assert (symfile_objfile
== NULL
);
986 /* Currently we keep symbols from the add-symbol-file command.
987 If the user wants to get rid of them, they should do "symbol-file"
988 without arguments first. Not sure this is the best behavior
991 (*objfile
->sf
->sym_new_init
) (objfile
);
994 /* Convert addr into an offset rather than an absolute address.
995 We find the lowest address of a loaded segment in the objfile,
996 and assume that <addr> is where that got loaded.
998 We no longer warn if the lowest section is not a text segment (as
999 happens for the PA64 port. */
1000 if (addrs
&& addrs
->other
[0].name
)
1001 addr_info_make_relative (addrs
, objfile
->obfd
);
1003 /* Initialize symbol reading routines for this objfile, allow complaints to
1004 appear for this new file, and record how verbose to be, then do the
1005 initial symbol reading for this file. */
1007 (*objfile
->sf
->sym_init
) (objfile
);
1008 clear_complaints (&symfile_complaints
, 1, add_flags
& SYMFILE_VERBOSE
);
1011 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
1014 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_offsets
);
1016 /* Just copy in the offset table directly as given to us. */
1017 objfile
->num_sections
= num_offsets
;
1018 objfile
->section_offsets
1019 = ((struct section_offsets
*)
1020 obstack_alloc (&objfile
->objfile_obstack
, size
));
1021 memcpy (objfile
->section_offsets
, offsets
, size
);
1023 init_objfile_sect_indices (objfile
);
1026 (*objfile
->sf
->sym_read
) (objfile
, add_flags
);
1028 /* Discard cleanups as symbol reading was successful. */
1030 discard_cleanups (old_chain
);
1034 /* Perform required actions after either reading in the initial
1035 symbols for a new objfile, or mapping in the symbols from a reusable
1036 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
1039 new_symfile_objfile (struct objfile
*objfile
, int add_flags
)
1041 /* If this is the main symbol file we have to clean up all users of the
1042 old main symbol file. Otherwise it is sufficient to fixup all the
1043 breakpoints that may have been redefined by this symbol file. */
1044 if (add_flags
& SYMFILE_MAINLINE
)
1046 /* OK, make it the "real" symbol file. */
1047 symfile_objfile
= objfile
;
1049 clear_symtab_users (add_flags
);
1051 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
1053 breakpoint_re_set ();
1056 /* We're done reading the symbol file; finish off complaints. */
1057 clear_complaints (&symfile_complaints
, 0, add_flags
& SYMFILE_VERBOSE
);
1060 /* Process a symbol file, as either the main file or as a dynamically
1063 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1064 This BFD will be closed on error, and is always consumed by this function.
1066 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1067 extra, such as dynamically loaded code, and what to do with breakpoins.
1069 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
1070 syms_from_objfile, above.
1071 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1073 Upon success, returns a pointer to the objfile that was added.
1074 Upon failure, jumps back to command level (never returns). */
1076 static struct objfile
*
1077 symbol_file_add_with_addrs_or_offsets (bfd
*abfd
,
1079 struct section_addr_info
*addrs
,
1080 struct section_offsets
*offsets
,
1084 struct objfile
*objfile
;
1085 struct cleanup
*my_cleanups
;
1086 const char *name
= bfd_get_filename (abfd
);
1087 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1089 if (readnow_symbol_files
)
1090 flags
|= OBJF_READNOW
;
1092 my_cleanups
= make_cleanup_bfd_close (abfd
);
1094 /* Give user a chance to burp if we'd be
1095 interactively wiping out any existing symbols. */
1097 if ((have_full_symbols () || have_partial_symbols ())
1098 && (add_flags
& SYMFILE_MAINLINE
)
1100 && !query (_("Load new symbol table from \"%s\"? "), name
))
1101 error (_("Not confirmed."));
1103 objfile
= allocate_objfile (abfd
, flags
);
1104 discard_cleanups (my_cleanups
);
1106 /* We either created a new mapped symbol table, mapped an existing
1107 symbol table file which has not had initial symbol reading
1108 performed, or need to read an unmapped symbol table. */
1109 if (from_tty
|| info_verbose
)
1111 if (deprecated_pre_add_symbol_hook
)
1112 deprecated_pre_add_symbol_hook (name
);
1115 printf_unfiltered (_("Reading symbols from %s..."), name
);
1117 gdb_flush (gdb_stdout
);
1120 syms_from_objfile (objfile
, addrs
, offsets
, num_offsets
,
1123 /* We now have at least a partial symbol table. Check to see if the
1124 user requested that all symbols be read on initial access via either
1125 the gdb startup command line or on a per symbol file basis. Expand
1126 all partial symbol tables for this objfile if so. */
1128 if ((flags
& OBJF_READNOW
))
1130 if (from_tty
|| info_verbose
)
1132 printf_unfiltered (_("expanding to full symbols..."));
1134 gdb_flush (gdb_stdout
);
1138 objfile
->sf
->qf
->expand_all_symtabs (objfile
);
1141 if ((from_tty
|| info_verbose
)
1142 && !objfile_has_symbols (objfile
))
1145 printf_unfiltered (_("(no debugging symbols found)..."));
1149 if (from_tty
|| info_verbose
)
1151 if (deprecated_post_add_symbol_hook
)
1152 deprecated_post_add_symbol_hook ();
1154 printf_unfiltered (_("done.\n"));
1157 /* We print some messages regardless of whether 'from_tty ||
1158 info_verbose' is true, so make sure they go out at the right
1160 gdb_flush (gdb_stdout
);
1162 do_cleanups (my_cleanups
);
1164 if (objfile
->sf
== NULL
)
1166 observer_notify_new_objfile (objfile
);
1167 return objfile
; /* No symbols. */
1170 new_symfile_objfile (objfile
, add_flags
);
1172 observer_notify_new_objfile (objfile
);
1174 bfd_cache_close_all ();
1178 /* Add BFD as a separate debug file for OBJFILE. */
1181 symbol_file_add_separate (bfd
*bfd
, int symfile_flags
, struct objfile
*objfile
)
1183 struct objfile
*new_objfile
;
1184 struct section_addr_info
*sap
;
1185 struct cleanup
*my_cleanup
;
1187 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1188 because sections of BFD may not match sections of OBJFILE and because
1189 vma may have been modified by tools such as prelink. */
1190 sap
= build_section_addr_info_from_objfile (objfile
);
1191 my_cleanup
= make_cleanup_free_section_addr_info (sap
);
1193 new_objfile
= symbol_file_add_with_addrs_or_offsets
1194 (bfd
, symfile_flags
,
1196 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1197 | OBJF_USERLOADED
));
1199 do_cleanups (my_cleanup
);
1201 add_separate_debug_objfile (new_objfile
, objfile
);
1204 /* Process the symbol file ABFD, as either the main file or as a
1205 dynamically loaded file.
1207 See symbol_file_add_with_addrs_or_offsets's comments for
1210 symbol_file_add_from_bfd (bfd
*abfd
, int add_flags
,
1211 struct section_addr_info
*addrs
,
1214 return symbol_file_add_with_addrs_or_offsets (abfd
, add_flags
, addrs
, 0, 0,
1219 /* Process a symbol file, as either the main file or as a dynamically
1220 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
1223 symbol_file_add (char *name
, int add_flags
, struct section_addr_info
*addrs
,
1226 return symbol_file_add_from_bfd (symfile_bfd_open (name
), add_flags
, addrs
,
1231 /* Call symbol_file_add() with default values and update whatever is
1232 affected by the loading of a new main().
1233 Used when the file is supplied in the gdb command line
1234 and by some targets with special loading requirements.
1235 The auxiliary function, symbol_file_add_main_1(), has the flags
1236 argument for the switches that can only be specified in the symbol_file
1240 symbol_file_add_main (char *args
, int from_tty
)
1242 symbol_file_add_main_1 (args
, from_tty
, 0);
1246 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
1248 const int add_flags
= SYMFILE_MAINLINE
| (from_tty
? SYMFILE_VERBOSE
: 0);
1249 symbol_file_add (args
, add_flags
, NULL
, flags
);
1251 /* Getting new symbols may change our opinion about
1252 what is frameless. */
1253 reinit_frame_cache ();
1255 set_initial_language ();
1259 symbol_file_clear (int from_tty
)
1261 if ((have_full_symbols () || have_partial_symbols ())
1264 ? !query (_("Discard symbol table from `%s'? "),
1265 symfile_objfile
->name
)
1266 : !query (_("Discard symbol table? "))))
1267 error (_("Not confirmed."));
1269 /* solib descriptors may have handles to objfiles. Wipe them before their
1270 objfiles get stale by free_all_objfiles. */
1271 no_shared_libraries (NULL
, from_tty
);
1273 free_all_objfiles ();
1275 gdb_assert (symfile_objfile
== NULL
);
1277 printf_unfiltered (_("No symbol file now.\n"));
1281 get_debug_link_info (struct objfile
*objfile
, unsigned long *crc32_out
)
1284 bfd_size_type debuglink_size
;
1285 unsigned long crc32
;
1289 sect
= bfd_get_section_by_name (objfile
->obfd
, ".gnu_debuglink");
1294 debuglink_size
= bfd_section_size (objfile
->obfd
, sect
);
1296 contents
= xmalloc (debuglink_size
);
1297 bfd_get_section_contents (objfile
->obfd
, sect
, contents
,
1298 (file_ptr
)0, (bfd_size_type
)debuglink_size
);
1300 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1301 crc_offset
= strlen (contents
) + 1;
1302 crc_offset
= (crc_offset
+ 3) & ~3;
1304 crc32
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) (contents
+ crc_offset
));
1311 separate_debug_file_exists (const char *name
, unsigned long crc
,
1312 struct objfile
*parent_objfile
)
1314 unsigned long file_crc
= 0;
1316 gdb_byte buffer
[8*1024];
1318 struct stat parent_stat
, abfd_stat
;
1320 /* Find a separate debug info file as if symbols would be present in
1321 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1322 section can contain just the basename of PARENT_OBJFILE without any
1323 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1324 the separate debug infos with the same basename can exist. */
1326 if (strcmp (name
, parent_objfile
->name
) == 0)
1329 abfd
= bfd_open_maybe_remote (name
);
1334 /* Verify symlinks were not the cause of strcmp name difference above.
1336 Some operating systems, e.g. Windows, do not provide a meaningful
1337 st_ino; they always set it to zero. (Windows does provide a
1338 meaningful st_dev.) Do not indicate a duplicate library in that
1339 case. While there is no guarantee that a system that provides
1340 meaningful inode numbers will never set st_ino to zero, this is
1341 merely an optimization, so we do not need to worry about false
1344 if (bfd_stat (abfd
, &abfd_stat
) == 0
1345 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0
1346 && abfd_stat
.st_dev
== parent_stat
.st_dev
1347 && abfd_stat
.st_ino
== parent_stat
.st_ino
1348 && abfd_stat
.st_ino
!= 0)
1354 while ((count
= bfd_bread (buffer
, sizeof (buffer
), abfd
)) > 0)
1355 file_crc
= gnu_debuglink_crc32 (file_crc
, buffer
, count
);
1359 if (crc
!= file_crc
)
1361 warning (_("the debug information found in \"%s\""
1362 " does not match \"%s\" (CRC mismatch).\n"),
1363 name
, parent_objfile
->name
);
1370 char *debug_file_directory
= NULL
;
1372 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1373 struct cmd_list_element
*c
, const char *value
)
1375 fprintf_filtered (file
, _("\
1376 The directory where separate debug symbols are searched for is \"%s\".\n"),
1380 #if ! defined (DEBUG_SUBDIRECTORY)
1381 #define DEBUG_SUBDIRECTORY ".debug"
1385 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1387 char *basename
, *debugdir
;
1389 char *debugfile
= NULL
;
1390 char *canon_name
= NULL
;
1391 unsigned long crc32
;
1394 basename
= get_debug_link_info (objfile
, &crc32
);
1396 if (basename
== NULL
)
1397 /* There's no separate debug info, hence there's no way we could
1398 load it => no warning. */
1399 goto cleanup_return_debugfile
;
1401 dir
= xstrdup (objfile
->name
);
1403 /* Strip off the final filename part, leaving the directory name,
1404 followed by a slash. The directory can be relative or absolute. */
1405 for (i
= strlen(dir
) - 1; i
>= 0; i
--)
1407 if (IS_DIR_SEPARATOR (dir
[i
]))
1410 /* If I is -1 then no directory is present there and DIR will be "". */
1413 /* Set I to max (strlen (canon_name), strlen (dir)). */
1414 canon_name
= lrealpath (dir
);
1416 if (canon_name
&& strlen (canon_name
) > i
)
1417 i
= strlen (canon_name
);
1419 debugfile
= xmalloc (strlen (debug_file_directory
) + 1
1421 + strlen (DEBUG_SUBDIRECTORY
)
1426 /* First try in the same directory as the original file. */
1427 strcpy (debugfile
, dir
);
1428 strcat (debugfile
, basename
);
1430 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1431 goto cleanup_return_debugfile
;
1433 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1434 strcpy (debugfile
, dir
);
1435 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1436 strcat (debugfile
, "/");
1437 strcat (debugfile
, basename
);
1439 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1440 goto cleanup_return_debugfile
;
1442 /* Then try in the global debugfile directories.
1444 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1445 cause "/..." lookups. */
1447 debugdir
= debug_file_directory
;
1452 while (*debugdir
== DIRNAME_SEPARATOR
)
1455 debugdir_end
= strchr (debugdir
, DIRNAME_SEPARATOR
);
1456 if (debugdir_end
== NULL
)
1457 debugdir_end
= &debugdir
[strlen (debugdir
)];
1459 memcpy (debugfile
, debugdir
, debugdir_end
- debugdir
);
1460 debugfile
[debugdir_end
- debugdir
] = 0;
1461 strcat (debugfile
, "/");
1462 strcat (debugfile
, dir
);
1463 strcat (debugfile
, basename
);
1465 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1466 goto cleanup_return_debugfile
;
1468 /* If the file is in the sysroot, try using its base path in the
1469 global debugfile directory. */
1471 && strncmp (canon_name
, gdb_sysroot
, strlen (gdb_sysroot
)) == 0
1472 && IS_DIR_SEPARATOR (canon_name
[strlen (gdb_sysroot
)]))
1474 memcpy (debugfile
, debugdir
, debugdir_end
- debugdir
);
1475 debugfile
[debugdir_end
- debugdir
] = 0;
1476 strcat (debugfile
, canon_name
+ strlen (gdb_sysroot
));
1477 strcat (debugfile
, "/");
1478 strcat (debugfile
, basename
);
1480 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1481 goto cleanup_return_debugfile
;
1484 debugdir
= debugdir_end
;
1486 while (*debugdir
!= 0);
1491 cleanup_return_debugfile
:
1499 /* This is the symbol-file command. Read the file, analyze its
1500 symbols, and add a struct symtab to a symtab list. The syntax of
1501 the command is rather bizarre:
1503 1. The function buildargv implements various quoting conventions
1504 which are undocumented and have little or nothing in common with
1505 the way things are quoted (or not quoted) elsewhere in GDB.
1507 2. Options are used, which are not generally used in GDB (perhaps
1508 "set mapped on", "set readnow on" would be better)
1510 3. The order of options matters, which is contrary to GNU
1511 conventions (because it is confusing and inconvenient). */
1514 symbol_file_command (char *args
, int from_tty
)
1520 symbol_file_clear (from_tty
);
1524 char **argv
= gdb_buildargv (args
);
1525 int flags
= OBJF_USERLOADED
;
1526 struct cleanup
*cleanups
;
1529 cleanups
= make_cleanup_freeargv (argv
);
1530 while (*argv
!= NULL
)
1532 if (strcmp (*argv
, "-readnow") == 0)
1533 flags
|= OBJF_READNOW
;
1534 else if (**argv
== '-')
1535 error (_("unknown option `%s'"), *argv
);
1538 symbol_file_add_main_1 (*argv
, from_tty
, flags
);
1546 error (_("no symbol file name was specified"));
1548 do_cleanups (cleanups
);
1552 /* Set the initial language.
1554 FIXME: A better solution would be to record the language in the
1555 psymtab when reading partial symbols, and then use it (if known) to
1556 set the language. This would be a win for formats that encode the
1557 language in an easily discoverable place, such as DWARF. For
1558 stabs, we can jump through hoops looking for specially named
1559 symbols or try to intuit the language from the specific type of
1560 stabs we find, but we can't do that until later when we read in
1564 set_initial_language (void)
1566 enum language lang
= language_unknown
;
1568 if (language_of_main
!= language_unknown
)
1569 lang
= language_of_main
;
1572 const char *filename
;
1574 filename
= find_main_filename ();
1575 if (filename
!= NULL
)
1576 lang
= deduce_language_from_filename (filename
);
1579 if (lang
== language_unknown
)
1581 /* Make C the default language */
1585 set_language (lang
);
1586 expected_language
= current_language
; /* Don't warn the user. */
1589 /* If NAME is a remote name open the file using remote protocol, otherwise
1590 open it normally. */
1593 bfd_open_maybe_remote (const char *name
)
1595 if (remote_filename_p (name
))
1596 return remote_bfd_open (name
, gnutarget
);
1598 return bfd_openr (name
, gnutarget
);
1602 /* Open the file specified by NAME and hand it off to BFD for
1603 preliminary analysis. Return a newly initialized bfd *, which
1604 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1605 absolute). In case of trouble, error() is called. */
1608 symfile_bfd_open (char *name
)
1612 char *absolute_name
;
1614 if (remote_filename_p (name
))
1616 name
= xstrdup (name
);
1617 sym_bfd
= remote_bfd_open (name
, gnutarget
);
1620 make_cleanup (xfree
, name
);
1621 error (_("`%s': can't open to read symbols: %s."), name
,
1622 bfd_errmsg (bfd_get_error ()));
1625 if (!bfd_check_format (sym_bfd
, bfd_object
))
1627 bfd_close (sym_bfd
);
1628 make_cleanup (xfree
, name
);
1629 error (_("`%s': can't read symbols: %s."), name
,
1630 bfd_errmsg (bfd_get_error ()));
1636 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy. */
1638 /* Look down path for it, allocate 2nd new malloc'd copy. */
1639 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, name
,
1640 O_RDONLY
| O_BINARY
, &absolute_name
);
1641 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1644 char *exename
= alloca (strlen (name
) + 5);
1646 strcat (strcpy (exename
, name
), ".exe");
1647 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, exename
,
1648 O_RDONLY
| O_BINARY
, &absolute_name
);
1653 make_cleanup (xfree
, name
);
1654 perror_with_name (name
);
1657 /* Free 1st new malloc'd copy, but keep the 2nd malloc'd copy in
1658 bfd. It'll be freed in free_objfile(). */
1660 name
= absolute_name
;
1662 sym_bfd
= bfd_fopen (name
, gnutarget
, FOPEN_RB
, desc
);
1666 make_cleanup (xfree
, name
);
1667 error (_("`%s': can't open to read symbols: %s."), name
,
1668 bfd_errmsg (bfd_get_error ()));
1670 bfd_set_cacheable (sym_bfd
, 1);
1672 if (!bfd_check_format (sym_bfd
, bfd_object
))
1674 /* FIXME: should be checking for errors from bfd_close (for one
1675 thing, on error it does not free all the storage associated
1677 bfd_close (sym_bfd
); /* This also closes desc. */
1678 make_cleanup (xfree
, name
);
1679 error (_("`%s': can't read symbols: %s."), name
,
1680 bfd_errmsg (bfd_get_error ()));
1683 /* bfd_usrdata exists for applications and libbfd must not touch it. */
1684 gdb_assert (bfd_usrdata (sym_bfd
) == NULL
);
1689 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1690 the section was not found. */
1693 get_section_index (struct objfile
*objfile
, char *section_name
)
1695 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1703 /* Link SF into the global symtab_fns list. Called on startup by the
1704 _initialize routine in each object file format reader, to register
1705 information about each format the the reader is prepared to
1709 add_symtab_fns (const struct sym_fns
*sf
)
1711 VEC_safe_push (sym_fns_ptr
, symtab_fns
, sf
);
1714 /* Initialize OBJFILE to read symbols from its associated BFD. It
1715 either returns or calls error(). The result is an initialized
1716 struct sym_fns in the objfile structure, that contains cached
1717 information about the symbol file. */
1719 static const struct sym_fns
*
1720 find_sym_fns (bfd
*abfd
)
1722 const struct sym_fns
*sf
;
1723 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1726 if (our_flavour
== bfd_target_srec_flavour
1727 || our_flavour
== bfd_target_ihex_flavour
1728 || our_flavour
== bfd_target_tekhex_flavour
)
1729 return NULL
; /* No symbols. */
1731 for (i
= 0; VEC_iterate (sym_fns_ptr
, symtab_fns
, i
, sf
); ++i
)
1732 if (our_flavour
== sf
->sym_flavour
)
1735 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1736 bfd_get_target (abfd
));
1740 /* This function runs the load command of our current target. */
1743 load_command (char *arg
, int from_tty
)
1747 /* The user might be reloading because the binary has changed. Take
1748 this opportunity to check. */
1749 reopen_exec_file ();
1757 parg
= arg
= get_exec_file (1);
1759 /* Count how many \ " ' tab space there are in the name. */
1760 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1768 /* We need to quote this string so buildargv can pull it apart. */
1769 char *temp
= xmalloc (strlen (arg
) + count
+ 1 );
1773 make_cleanup (xfree
, temp
);
1776 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1778 strncpy (ptemp
, prev
, parg
- prev
);
1779 ptemp
+= parg
- prev
;
1783 strcpy (ptemp
, prev
);
1789 target_load (arg
, from_tty
);
1791 /* After re-loading the executable, we don't really know which
1792 overlays are mapped any more. */
1793 overlay_cache_invalid
= 1;
1796 /* This version of "load" should be usable for any target. Currently
1797 it is just used for remote targets, not inftarg.c or core files,
1798 on the theory that only in that case is it useful.
1800 Avoiding xmodem and the like seems like a win (a) because we don't have
1801 to worry about finding it, and (b) On VMS, fork() is very slow and so
1802 we don't want to run a subprocess. On the other hand, I'm not sure how
1803 performance compares. */
1805 static int validate_download
= 0;
1807 /* Callback service function for generic_load (bfd_map_over_sections). */
1810 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1812 bfd_size_type
*sum
= data
;
1814 *sum
+= bfd_get_section_size (asec
);
1817 /* Opaque data for load_section_callback. */
1818 struct load_section_data
{
1819 unsigned long load_offset
;
1820 struct load_progress_data
*progress_data
;
1821 VEC(memory_write_request_s
) *requests
;
1824 /* Opaque data for load_progress. */
1825 struct load_progress_data
{
1826 /* Cumulative data. */
1827 unsigned long write_count
;
1828 unsigned long data_count
;
1829 bfd_size_type total_size
;
1832 /* Opaque data for load_progress for a single section. */
1833 struct load_progress_section_data
{
1834 struct load_progress_data
*cumulative
;
1836 /* Per-section data. */
1837 const char *section_name
;
1838 ULONGEST section_sent
;
1839 ULONGEST section_size
;
1844 /* Target write callback routine for progress reporting. */
1847 load_progress (ULONGEST bytes
, void *untyped_arg
)
1849 struct load_progress_section_data
*args
= untyped_arg
;
1850 struct load_progress_data
*totals
;
1853 /* Writing padding data. No easy way to get at the cumulative
1854 stats, so just ignore this. */
1857 totals
= args
->cumulative
;
1859 if (bytes
== 0 && args
->section_sent
== 0)
1861 /* The write is just starting. Let the user know we've started
1863 ui_out_message (uiout
, 0, "Loading section %s, size %s lma %s\n",
1864 args
->section_name
, hex_string (args
->section_size
),
1865 paddress (target_gdbarch
, args
->lma
));
1869 if (validate_download
)
1871 /* Broken memories and broken monitors manifest themselves here
1872 when bring new computers to life. This doubles already slow
1874 /* NOTE: cagney/1999-10-18: A more efficient implementation
1875 might add a verify_memory() method to the target vector and
1876 then use that. remote.c could implement that method using
1877 the ``qCRC'' packet. */
1878 gdb_byte
*check
= xmalloc (bytes
);
1879 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
1881 if (target_read_memory (args
->lma
, check
, bytes
) != 0)
1882 error (_("Download verify read failed at %s"),
1883 paddress (target_gdbarch
, args
->lma
));
1884 if (memcmp (args
->buffer
, check
, bytes
) != 0)
1885 error (_("Download verify compare failed at %s"),
1886 paddress (target_gdbarch
, args
->lma
));
1887 do_cleanups (verify_cleanups
);
1889 totals
->data_count
+= bytes
;
1891 args
->buffer
+= bytes
;
1892 totals
->write_count
+= 1;
1893 args
->section_sent
+= bytes
;
1895 || (deprecated_ui_load_progress_hook
!= NULL
1896 && deprecated_ui_load_progress_hook (args
->section_name
,
1897 args
->section_sent
)))
1898 error (_("Canceled the download"));
1900 if (deprecated_show_load_progress
!= NULL
)
1901 deprecated_show_load_progress (args
->section_name
,
1905 totals
->total_size
);
1908 /* Callback service function for generic_load (bfd_map_over_sections). */
1911 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1913 struct memory_write_request
*new_request
;
1914 struct load_section_data
*args
= data
;
1915 struct load_progress_section_data
*section_data
;
1916 bfd_size_type size
= bfd_get_section_size (asec
);
1918 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1920 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
1926 new_request
= VEC_safe_push (memory_write_request_s
,
1927 args
->requests
, NULL
);
1928 memset (new_request
, 0, sizeof (struct memory_write_request
));
1929 section_data
= xcalloc (1, sizeof (struct load_progress_section_data
));
1930 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1931 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size be in instead? */
1932 new_request
->data
= xmalloc (size
);
1933 new_request
->baton
= section_data
;
1935 buffer
= new_request
->data
;
1937 section_data
->cumulative
= args
->progress_data
;
1938 section_data
->section_name
= sect_name
;
1939 section_data
->section_size
= size
;
1940 section_data
->lma
= new_request
->begin
;
1941 section_data
->buffer
= buffer
;
1943 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1946 /* Clean up an entire memory request vector, including load
1947 data and progress records. */
1950 clear_memory_write_data (void *arg
)
1952 VEC(memory_write_request_s
) **vec_p
= arg
;
1953 VEC(memory_write_request_s
) *vec
= *vec_p
;
1955 struct memory_write_request
*mr
;
1957 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
1962 VEC_free (memory_write_request_s
, vec
);
1966 generic_load (char *args
, int from_tty
)
1969 struct timeval start_time
, end_time
;
1971 struct cleanup
*old_cleanups
= make_cleanup (null_cleanup
, 0);
1972 struct load_section_data cbdata
;
1973 struct load_progress_data total_progress
;
1978 memset (&cbdata
, 0, sizeof (cbdata
));
1979 memset (&total_progress
, 0, sizeof (total_progress
));
1980 cbdata
.progress_data
= &total_progress
;
1982 make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
1985 error_no_arg (_("file to load"));
1987 argv
= gdb_buildargv (args
);
1988 make_cleanup_freeargv (argv
);
1990 filename
= tilde_expand (argv
[0]);
1991 make_cleanup (xfree
, filename
);
1993 if (argv
[1] != NULL
)
1997 cbdata
.load_offset
= strtoul (argv
[1], &endptr
, 0);
1999 /* If the last word was not a valid number then
2000 treat it as a file name with spaces in. */
2001 if (argv
[1] == endptr
)
2002 error (_("Invalid download offset:%s."), argv
[1]);
2004 if (argv
[2] != NULL
)
2005 error (_("Too many parameters."));
2008 /* Open the file for loading. */
2009 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
2010 if (loadfile_bfd
== NULL
)
2012 perror_with_name (filename
);
2016 /* FIXME: should be checking for errors from bfd_close (for one thing,
2017 on error it does not free all the storage associated with the
2019 make_cleanup_bfd_close (loadfile_bfd
);
2021 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
2023 error (_("\"%s\" is not an object file: %s"), filename
,
2024 bfd_errmsg (bfd_get_error ()));
2027 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
2028 (void *) &total_progress
.total_size
);
2030 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
2032 gettimeofday (&start_time
, NULL
);
2034 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2035 load_progress
) != 0)
2036 error (_("Load failed"));
2038 gettimeofday (&end_time
, NULL
);
2040 entry
= bfd_get_start_address (loadfile_bfd
);
2041 ui_out_text (uiout
, "Start address ");
2042 ui_out_field_fmt (uiout
, "address", "%s", paddress (target_gdbarch
, entry
));
2043 ui_out_text (uiout
, ", load size ");
2044 ui_out_field_fmt (uiout
, "load-size", "%lu", total_progress
.data_count
);
2045 ui_out_text (uiout
, "\n");
2046 /* We were doing this in remote-mips.c, I suspect it is right
2047 for other targets too. */
2048 regcache_write_pc (get_current_regcache (), entry
);
2050 /* Reset breakpoints, now that we have changed the load image. For
2051 instance, breakpoints may have been set (or reset, by
2052 post_create_inferior) while connected to the target but before we
2053 loaded the program. In that case, the prologue analyzer could
2054 have read instructions from the target to find the right
2055 breakpoint locations. Loading has changed the contents of that
2058 breakpoint_re_set ();
2060 /* FIXME: are we supposed to call symbol_file_add or not? According
2061 to a comment from remote-mips.c (where a call to symbol_file_add
2062 was commented out), making the call confuses GDB if more than one
2063 file is loaded in. Some targets do (e.g., remote-vx.c) but
2064 others don't (or didn't - perhaps they have all been deleted). */
2066 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2067 total_progress
.write_count
,
2068 &start_time
, &end_time
);
2070 do_cleanups (old_cleanups
);
2073 /* Report how fast the transfer went. */
2075 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
2076 replaced by print_transfer_performance (with a very different
2077 function signature). */
2080 report_transfer_performance (unsigned long data_count
, time_t start_time
,
2083 struct timeval start
, end
;
2085 start
.tv_sec
= start_time
;
2087 end
.tv_sec
= end_time
;
2090 print_transfer_performance (gdb_stdout
, data_count
, 0, &start
, &end
);
2094 print_transfer_performance (struct ui_file
*stream
,
2095 unsigned long data_count
,
2096 unsigned long write_count
,
2097 const struct timeval
*start_time
,
2098 const struct timeval
*end_time
)
2100 ULONGEST time_count
;
2102 /* Compute the elapsed time in milliseconds, as a tradeoff between
2103 accuracy and overflow. */
2104 time_count
= (end_time
->tv_sec
- start_time
->tv_sec
) * 1000;
2105 time_count
+= (end_time
->tv_usec
- start_time
->tv_usec
) / 1000;
2107 ui_out_text (uiout
, "Transfer rate: ");
2110 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / time_count
;
2112 if (ui_out_is_mi_like_p (uiout
))
2114 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
* 8);
2115 ui_out_text (uiout
, " bits/sec");
2117 else if (rate
< 1024)
2119 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
);
2120 ui_out_text (uiout
, " bytes/sec");
2124 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
/ 1024);
2125 ui_out_text (uiout
, " KB/sec");
2130 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
2131 ui_out_text (uiout
, " bits in <1 sec");
2133 if (write_count
> 0)
2135 ui_out_text (uiout
, ", ");
2136 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
2137 ui_out_text (uiout
, " bytes/write");
2139 ui_out_text (uiout
, ".\n");
2142 /* This function allows the addition of incrementally linked object files.
2143 It does not modify any state in the target, only in the debugger. */
2144 /* Note: ezannoni 2000-04-13 This function/command used to have a
2145 special case syntax for the rombug target (Rombug is the boot
2146 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2147 rombug case, the user doesn't need to supply a text address,
2148 instead a call to target_link() (in target.c) would supply the
2149 value to use. We are now discontinuing this type of ad hoc syntax. */
2152 add_symbol_file_command (char *args
, int from_tty
)
2154 struct gdbarch
*gdbarch
= get_current_arch ();
2155 char *filename
= NULL
;
2156 int flags
= OBJF_USERLOADED
;
2158 int section_index
= 0;
2162 int expecting_sec_name
= 0;
2163 int expecting_sec_addr
= 0;
2172 struct section_addr_info
*section_addrs
;
2173 struct sect_opt
*sect_opts
= NULL
;
2174 size_t num_sect_opts
= 0;
2175 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2178 sect_opts
= (struct sect_opt
*) xmalloc (num_sect_opts
2179 * sizeof (struct sect_opt
));
2184 error (_("add-symbol-file takes a file name and an address"));
2186 argv
= gdb_buildargv (args
);
2187 make_cleanup_freeargv (argv
);
2189 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2191 /* Process the argument. */
2194 /* The first argument is the file name. */
2195 filename
= tilde_expand (arg
);
2196 make_cleanup (xfree
, filename
);
2201 /* The second argument is always the text address at which
2202 to load the program. */
2203 sect_opts
[section_index
].name
= ".text";
2204 sect_opts
[section_index
].value
= arg
;
2205 if (++section_index
>= num_sect_opts
)
2208 sect_opts
= ((struct sect_opt
*)
2209 xrealloc (sect_opts
,
2211 * sizeof (struct sect_opt
)));
2216 /* It's an option (starting with '-') or it's an argument
2221 if (strcmp (arg
, "-readnow") == 0)
2222 flags
|= OBJF_READNOW
;
2223 else if (strcmp (arg
, "-s") == 0)
2225 expecting_sec_name
= 1;
2226 expecting_sec_addr
= 1;
2231 if (expecting_sec_name
)
2233 sect_opts
[section_index
].name
= arg
;
2234 expecting_sec_name
= 0;
2237 if (expecting_sec_addr
)
2239 sect_opts
[section_index
].value
= arg
;
2240 expecting_sec_addr
= 0;
2241 if (++section_index
>= num_sect_opts
)
2244 sect_opts
= ((struct sect_opt
*)
2245 xrealloc (sect_opts
,
2247 * sizeof (struct sect_opt
)));
2251 error (_("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*"));
2256 /* This command takes at least two arguments. The first one is a
2257 filename, and the second is the address where this file has been
2258 loaded. Abort now if this address hasn't been provided by the
2260 if (section_index
< 1)
2261 error (_("The address where %s has been loaded is missing"), filename
);
2263 /* Print the prompt for the query below. And save the arguments into
2264 a sect_addr_info structure to be passed around to other
2265 functions. We have to split this up into separate print
2266 statements because hex_string returns a local static
2269 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename
);
2270 section_addrs
= alloc_section_addr_info (section_index
);
2271 make_cleanup (xfree
, section_addrs
);
2272 for (i
= 0; i
< section_index
; i
++)
2275 char *val
= sect_opts
[i
].value
;
2276 char *sec
= sect_opts
[i
].name
;
2278 addr
= parse_and_eval_address (val
);
2280 /* Here we store the section offsets in the order they were
2281 entered on the command line. */
2282 section_addrs
->other
[sec_num
].name
= sec
;
2283 section_addrs
->other
[sec_num
].addr
= addr
;
2284 printf_unfiltered ("\t%s_addr = %s\n", sec
,
2285 paddress (gdbarch
, addr
));
2288 /* The object's sections are initialized when a
2289 call is made to build_objfile_section_table (objfile).
2290 This happens in reread_symbols.
2291 At this point, we don't know what file type this is,
2292 so we can't determine what section names are valid. */
2295 if (from_tty
&& (!query ("%s", "")))
2296 error (_("Not confirmed."));
2298 symbol_file_add (filename
, from_tty
? SYMFILE_VERBOSE
: 0,
2299 section_addrs
, flags
);
2301 /* Getting new symbols may change our opinion about what is
2303 reinit_frame_cache ();
2304 do_cleanups (my_cleanups
);
2308 /* Re-read symbols if a symbol-file has changed. */
2310 reread_symbols (void)
2312 struct objfile
*objfile
;
2315 struct stat new_statbuf
;
2318 /* With the addition of shared libraries, this should be modified,
2319 the load time should be saved in the partial symbol tables, since
2320 different tables may come from different source files. FIXME.
2321 This routine should then walk down each partial symbol table
2322 and see if the symbol table that it originates from has been changed */
2324 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2326 /* solib-sunos.c creates one objfile with obfd. */
2327 if (objfile
->obfd
== NULL
)
2330 /* Separate debug objfiles are handled in the main objfile. */
2331 if (objfile
->separate_debug_objfile_backlink
)
2334 /* If this object is from an archive (what you usually create with
2335 `ar', often called a `static library' on most systems, though
2336 a `shared library' on AIX is also an archive), then you should
2337 stat on the archive name, not member name. */
2338 if (objfile
->obfd
->my_archive
)
2339 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2341 res
= stat (objfile
->name
, &new_statbuf
);
2344 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2345 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2349 new_modtime
= new_statbuf
.st_mtime
;
2350 if (new_modtime
!= objfile
->mtime
)
2352 struct cleanup
*old_cleanups
;
2353 struct section_offsets
*offsets
;
2355 char *obfd_filename
;
2357 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2360 /* There are various functions like symbol_file_add,
2361 symfile_bfd_open, syms_from_objfile, etc., which might
2362 appear to do what we want. But they have various other
2363 effects which we *don't* want. So we just do stuff
2364 ourselves. We don't worry about mapped files (for one thing,
2365 any mapped file will be out of date). */
2367 /* If we get an error, blow away this objfile (not sure if
2368 that is the correct response for things like shared
2370 old_cleanups
= make_cleanup_free_objfile (objfile
);
2371 /* We need to do this whenever any symbols go away. */
2372 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2374 if (exec_bfd
!= NULL
&& strcmp (bfd_get_filename (objfile
->obfd
),
2375 bfd_get_filename (exec_bfd
)) == 0)
2377 /* Reload EXEC_BFD without asking anything. */
2379 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2382 /* Clean up any state BFD has sitting around. We don't need
2383 to close the descriptor but BFD lacks a way of closing the
2384 BFD without closing the descriptor. */
2385 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2386 if (!bfd_close (objfile
->obfd
))
2387 error (_("Can't close BFD for %s: %s"), objfile
->name
,
2388 bfd_errmsg (bfd_get_error ()));
2389 objfile
->obfd
= bfd_open_maybe_remote (obfd_filename
);
2390 if (objfile
->obfd
== NULL
)
2391 error (_("Can't open %s to read symbols."), objfile
->name
);
2393 objfile
->obfd
= gdb_bfd_ref (objfile
->obfd
);
2394 /* bfd_openr sets cacheable to true, which is what we want. */
2395 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2396 error (_("Can't read symbols from %s: %s."), objfile
->name
,
2397 bfd_errmsg (bfd_get_error ()));
2399 /* Save the offsets, we will nuke them with the rest of the
2401 num_offsets
= objfile
->num_sections
;
2402 offsets
= ((struct section_offsets
*)
2403 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2404 memcpy (offsets
, objfile
->section_offsets
,
2405 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2407 /* Remove any references to this objfile in the global
2409 preserve_values (objfile
);
2411 /* Nuke all the state that we will re-read. Much of the following
2412 code which sets things to NULL really is necessary to tell
2413 other parts of GDB that there is nothing currently there.
2415 Try to keep the freeing order compatible with free_objfile. */
2417 if (objfile
->sf
!= NULL
)
2419 (*objfile
->sf
->sym_finish
) (objfile
);
2422 clear_objfile_data (objfile
);
2424 /* Free the separate debug objfiles. It will be
2425 automatically recreated by sym_read. */
2426 free_objfile_separate_debug (objfile
);
2428 /* FIXME: Do we have to free a whole linked list, or is this
2430 if (objfile
->global_psymbols
.list
)
2431 xfree (objfile
->global_psymbols
.list
);
2432 memset (&objfile
->global_psymbols
, 0,
2433 sizeof (objfile
->global_psymbols
));
2434 if (objfile
->static_psymbols
.list
)
2435 xfree (objfile
->static_psymbols
.list
);
2436 memset (&objfile
->static_psymbols
, 0,
2437 sizeof (objfile
->static_psymbols
));
2439 /* Free the obstacks for non-reusable objfiles */
2440 psymbol_bcache_free (objfile
->psymbol_cache
);
2441 objfile
->psymbol_cache
= psymbol_bcache_init ();
2442 bcache_xfree (objfile
->macro_cache
);
2443 objfile
->macro_cache
= bcache_xmalloc (NULL
, NULL
);
2444 bcache_xfree (objfile
->filename_cache
);
2445 objfile
->filename_cache
= bcache_xmalloc (NULL
,NULL
);
2446 if (objfile
->demangled_names_hash
!= NULL
)
2448 htab_delete (objfile
->demangled_names_hash
);
2449 objfile
->demangled_names_hash
= NULL
;
2451 obstack_free (&objfile
->objfile_obstack
, 0);
2452 objfile
->sections
= NULL
;
2453 objfile
->symtabs
= NULL
;
2454 objfile
->psymtabs
= NULL
;
2455 objfile
->psymtabs_addrmap
= NULL
;
2456 objfile
->free_psymtabs
= NULL
;
2457 objfile
->cp_namespace_symtab
= NULL
;
2458 objfile
->template_symbols
= NULL
;
2459 objfile
->msymbols
= NULL
;
2460 objfile
->deprecated_sym_private
= NULL
;
2461 objfile
->minimal_symbol_count
= 0;
2462 memset (&objfile
->msymbol_hash
, 0,
2463 sizeof (objfile
->msymbol_hash
));
2464 memset (&objfile
->msymbol_demangled_hash
, 0,
2465 sizeof (objfile
->msymbol_demangled_hash
));
2467 objfile
->psymbol_cache
= psymbol_bcache_init ();
2468 objfile
->macro_cache
= bcache_xmalloc (NULL
, NULL
);
2469 objfile
->filename_cache
= bcache_xmalloc (NULL
, NULL
);
2470 /* obstack_init also initializes the obstack so it is
2471 empty. We could use obstack_specify_allocation but
2472 gdb_obstack.h specifies the alloc/dealloc
2474 obstack_init (&objfile
->objfile_obstack
);
2475 if (build_objfile_section_table (objfile
))
2477 error (_("Can't find the file sections in `%s': %s"),
2478 objfile
->name
, bfd_errmsg (bfd_get_error ()));
2480 terminate_minimal_symbol_table (objfile
);
2482 /* We use the same section offsets as from last time. I'm not
2483 sure whether that is always correct for shared libraries. */
2484 objfile
->section_offsets
= (struct section_offsets
*)
2485 obstack_alloc (&objfile
->objfile_obstack
,
2486 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2487 memcpy (objfile
->section_offsets
, offsets
,
2488 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2489 objfile
->num_sections
= num_offsets
;
2491 /* What the hell is sym_new_init for, anyway? The concept of
2492 distinguishing between the main file and additional files
2493 in this way seems rather dubious. */
2494 if (objfile
== symfile_objfile
)
2496 (*objfile
->sf
->sym_new_init
) (objfile
);
2499 (*objfile
->sf
->sym_init
) (objfile
);
2500 clear_complaints (&symfile_complaints
, 1, 1);
2501 /* Do not set flags as this is safe and we don't want to be
2503 (*objfile
->sf
->sym_read
) (objfile
, 0);
2504 if (!objfile_has_symbols (objfile
))
2507 printf_unfiltered (_("(no debugging symbols found)\n"));
2511 /* We're done reading the symbol file; finish off complaints. */
2512 clear_complaints (&symfile_complaints
, 0, 1);
2514 /* Getting new symbols may change our opinion about what is
2517 reinit_frame_cache ();
2519 /* Discard cleanups as symbol reading was successful. */
2520 discard_cleanups (old_cleanups
);
2522 /* If the mtime has changed between the time we set new_modtime
2523 and now, we *want* this to be out of date, so don't call stat
2525 objfile
->mtime
= new_modtime
;
2527 init_entry_point_info (objfile
);
2533 /* Notify objfiles that we've modified objfile sections. */
2534 objfiles_changed ();
2536 clear_symtab_users (0);
2537 /* At least one objfile has changed, so we can consider that
2538 the executable we're debugging has changed too. */
2539 observer_notify_executable_changed ();
2552 static filename_language
*filename_language_table
;
2553 static int fl_table_size
, fl_table_next
;
2556 add_filename_language (char *ext
, enum language lang
)
2558 if (fl_table_next
>= fl_table_size
)
2560 fl_table_size
+= 10;
2561 filename_language_table
=
2562 xrealloc (filename_language_table
,
2563 fl_table_size
* sizeof (*filename_language_table
));
2566 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2567 filename_language_table
[fl_table_next
].lang
= lang
;
2571 static char *ext_args
;
2573 show_ext_args (struct ui_file
*file
, int from_tty
,
2574 struct cmd_list_element
*c
, const char *value
)
2576 fprintf_filtered (file
, _("\
2577 Mapping between filename extension and source language is \"%s\".\n"),
2582 set_ext_lang_command (char *args
, int from_tty
, struct cmd_list_element
*e
)
2585 char *cp
= ext_args
;
2588 /* First arg is filename extension, starting with '.' */
2590 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2592 /* Find end of first arg. */
2593 while (*cp
&& !isspace (*cp
))
2597 error (_("'%s': two arguments required -- filename extension and language"),
2600 /* Null-terminate first arg */
2603 /* Find beginning of second arg, which should be a source language. */
2604 while (*cp
&& isspace (*cp
))
2608 error (_("'%s': two arguments required -- filename extension and language"),
2611 /* Lookup the language from among those we know. */
2612 lang
= language_enum (cp
);
2614 /* Now lookup the filename extension: do we already know it? */
2615 for (i
= 0; i
< fl_table_next
; i
++)
2616 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2619 if (i
>= fl_table_next
)
2621 /* new file extension */
2622 add_filename_language (ext_args
, lang
);
2626 /* redefining a previously known filename extension */
2629 /* query ("Really make files of type %s '%s'?", */
2630 /* ext_args, language_str (lang)); */
2632 xfree (filename_language_table
[i
].ext
);
2633 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2634 filename_language_table
[i
].lang
= lang
;
2639 info_ext_lang_command (char *args
, int from_tty
)
2643 printf_filtered (_("Filename extensions and the languages they represent:"));
2644 printf_filtered ("\n\n");
2645 for (i
= 0; i
< fl_table_next
; i
++)
2646 printf_filtered ("\t%s\t- %s\n",
2647 filename_language_table
[i
].ext
,
2648 language_str (filename_language_table
[i
].lang
));
2652 init_filename_language_table (void)
2654 if (fl_table_size
== 0) /* protect against repetition */
2658 filename_language_table
=
2659 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
2660 add_filename_language (".c", language_c
);
2661 add_filename_language (".d", language_d
);
2662 add_filename_language (".C", language_cplus
);
2663 add_filename_language (".cc", language_cplus
);
2664 add_filename_language (".cp", language_cplus
);
2665 add_filename_language (".cpp", language_cplus
);
2666 add_filename_language (".cxx", language_cplus
);
2667 add_filename_language (".c++", language_cplus
);
2668 add_filename_language (".java", language_java
);
2669 add_filename_language (".class", language_java
);
2670 add_filename_language (".m", language_objc
);
2671 add_filename_language (".f", language_fortran
);
2672 add_filename_language (".F", language_fortran
);
2673 add_filename_language (".for", language_fortran
);
2674 add_filename_language (".FOR", language_fortran
);
2675 add_filename_language (".ftn", language_fortran
);
2676 add_filename_language (".FTN", language_fortran
);
2677 add_filename_language (".fpp", language_fortran
);
2678 add_filename_language (".FPP", language_fortran
);
2679 add_filename_language (".f90", language_fortran
);
2680 add_filename_language (".F90", language_fortran
);
2681 add_filename_language (".f95", language_fortran
);
2682 add_filename_language (".F95", language_fortran
);
2683 add_filename_language (".f03", language_fortran
);
2684 add_filename_language (".F03", language_fortran
);
2685 add_filename_language (".f08", language_fortran
);
2686 add_filename_language (".F08", language_fortran
);
2687 add_filename_language (".s", language_asm
);
2688 add_filename_language (".sx", language_asm
);
2689 add_filename_language (".S", language_asm
);
2690 add_filename_language (".pas", language_pascal
);
2691 add_filename_language (".p", language_pascal
);
2692 add_filename_language (".pp", language_pascal
);
2693 add_filename_language (".adb", language_ada
);
2694 add_filename_language (".ads", language_ada
);
2695 add_filename_language (".a", language_ada
);
2696 add_filename_language (".ada", language_ada
);
2697 add_filename_language (".dg", language_ada
);
2702 deduce_language_from_filename (const char *filename
)
2707 if (filename
!= NULL
)
2708 if ((cp
= strrchr (filename
, '.')) != NULL
)
2709 for (i
= 0; i
< fl_table_next
; i
++)
2710 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2711 return filename_language_table
[i
].lang
;
2713 return language_unknown
;
2718 Allocate and partly initialize a new symbol table. Return a pointer
2719 to it. error() if no space.
2721 Caller must set these fields:
2730 allocate_symtab (const char *filename
, struct objfile
*objfile
)
2732 struct symtab
*symtab
;
2734 symtab
= (struct symtab
*)
2735 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symtab
));
2736 memset (symtab
, 0, sizeof (*symtab
));
2737 symtab
->filename
= (char *) bcache (filename
, strlen (filename
) + 1,
2738 objfile
->filename_cache
);
2739 symtab
->fullname
= NULL
;
2740 symtab
->language
= deduce_language_from_filename (filename
);
2741 symtab
->debugformat
= "unknown";
2743 /* Hook it to the objfile it comes from */
2745 symtab
->objfile
= objfile
;
2746 symtab
->next
= objfile
->symtabs
;
2747 objfile
->symtabs
= symtab
;
2753 /* Reset all data structures in gdb which may contain references to symbol
2754 table data. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
2757 clear_symtab_users (int add_flags
)
2759 /* Someday, we should do better than this, by only blowing away
2760 the things that really need to be blown. */
2762 /* Clear the "current" symtab first, because it is no longer valid.
2763 breakpoint_re_set may try to access the current symtab. */
2764 clear_current_source_symtab_and_line ();
2767 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
2768 breakpoint_re_set ();
2769 set_default_breakpoint (0, NULL
, 0, 0, 0);
2770 clear_pc_function_cache ();
2771 observer_notify_new_objfile (NULL
);
2773 /* Clear globals which might have pointed into a removed objfile.
2774 FIXME: It's not clear which of these are supposed to persist
2775 between expressions and which ought to be reset each time. */
2776 expression_context_block
= NULL
;
2777 innermost_block
= NULL
;
2779 /* Varobj may refer to old symbols, perform a cleanup. */
2780 varobj_invalidate ();
2785 clear_symtab_users_cleanup (void *ignore
)
2787 clear_symtab_users (0);
2791 The following code implements an abstraction for debugging overlay sections.
2793 The target model is as follows:
2794 1) The gnu linker will permit multiple sections to be mapped into the
2795 same VMA, each with its own unique LMA (or load address).
2796 2) It is assumed that some runtime mechanism exists for mapping the
2797 sections, one by one, from the load address into the VMA address.
2798 3) This code provides a mechanism for gdb to keep track of which
2799 sections should be considered to be mapped from the VMA to the LMA.
2800 This information is used for symbol lookup, and memory read/write.
2801 For instance, if a section has been mapped then its contents
2802 should be read from the VMA, otherwise from the LMA.
2804 Two levels of debugger support for overlays are available. One is
2805 "manual", in which the debugger relies on the user to tell it which
2806 overlays are currently mapped. This level of support is
2807 implemented entirely in the core debugger, and the information about
2808 whether a section is mapped is kept in the objfile->obj_section table.
2810 The second level of support is "automatic", and is only available if
2811 the target-specific code provides functionality to read the target's
2812 overlay mapping table, and translate its contents for the debugger
2813 (by updating the mapped state information in the obj_section tables).
2815 The interface is as follows:
2817 overlay map <name> -- tell gdb to consider this section mapped
2818 overlay unmap <name> -- tell gdb to consider this section unmapped
2819 overlay list -- list the sections that GDB thinks are mapped
2820 overlay read-target -- get the target's state of what's mapped
2821 overlay off/manual/auto -- set overlay debugging state
2822 Functional interface:
2823 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2824 section, return that section.
2825 find_pc_overlay(pc): find any overlay section that contains
2826 the pc, either in its VMA or its LMA
2827 section_is_mapped(sect): true if overlay is marked as mapped
2828 section_is_overlay(sect): true if section's VMA != LMA
2829 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2830 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2831 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2832 overlay_mapped_address(...): map an address from section's LMA to VMA
2833 overlay_unmapped_address(...): map an address from section's VMA to LMA
2834 symbol_overlayed_address(...): Return a "current" address for symbol:
2835 either in VMA or LMA depending on whether
2836 the symbol's section is currently mapped
2839 /* Overlay debugging state: */
2841 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2842 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
2844 /* Function: section_is_overlay (SECTION)
2845 Returns true if SECTION has VMA not equal to LMA, ie.
2846 SECTION is loaded at an address different from where it will "run". */
2849 section_is_overlay (struct obj_section
*section
)
2851 if (overlay_debugging
&& section
)
2853 bfd
*abfd
= section
->objfile
->obfd
;
2854 asection
*bfd_section
= section
->the_bfd_section
;
2856 if (bfd_section_lma (abfd
, bfd_section
) != 0
2857 && bfd_section_lma (abfd
, bfd_section
)
2858 != bfd_section_vma (abfd
, bfd_section
))
2865 /* Function: overlay_invalidate_all (void)
2866 Invalidate the mapped state of all overlay sections (mark it as stale). */
2869 overlay_invalidate_all (void)
2871 struct objfile
*objfile
;
2872 struct obj_section
*sect
;
2874 ALL_OBJSECTIONS (objfile
, sect
)
2875 if (section_is_overlay (sect
))
2876 sect
->ovly_mapped
= -1;
2879 /* Function: section_is_mapped (SECTION)
2880 Returns true if section is an overlay, and is currently mapped.
2882 Access to the ovly_mapped flag is restricted to this function, so
2883 that we can do automatic update. If the global flag
2884 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2885 overlay_invalidate_all. If the mapped state of the particular
2886 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2889 section_is_mapped (struct obj_section
*osect
)
2891 struct gdbarch
*gdbarch
;
2893 if (osect
== 0 || !section_is_overlay (osect
))
2896 switch (overlay_debugging
)
2900 return 0; /* overlay debugging off */
2901 case ovly_auto
: /* overlay debugging automatic */
2902 /* Unles there is a gdbarch_overlay_update function,
2903 there's really nothing useful to do here (can't really go auto) */
2904 gdbarch
= get_objfile_arch (osect
->objfile
);
2905 if (gdbarch_overlay_update_p (gdbarch
))
2907 if (overlay_cache_invalid
)
2909 overlay_invalidate_all ();
2910 overlay_cache_invalid
= 0;
2912 if (osect
->ovly_mapped
== -1)
2913 gdbarch_overlay_update (gdbarch
, osect
);
2915 /* fall thru to manual case */
2916 case ovly_on
: /* overlay debugging manual */
2917 return osect
->ovly_mapped
== 1;
2921 /* Function: pc_in_unmapped_range
2922 If PC falls into the lma range of SECTION, return true, else false. */
2925 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
2927 if (section_is_overlay (section
))
2929 bfd
*abfd
= section
->objfile
->obfd
;
2930 asection
*bfd_section
= section
->the_bfd_section
;
2932 /* We assume the LMA is relocated by the same offset as the VMA. */
2933 bfd_vma size
= bfd_get_section_size (bfd_section
);
2934 CORE_ADDR offset
= obj_section_offset (section
);
2936 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
2937 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
2944 /* Function: pc_in_mapped_range
2945 If PC falls into the vma range of SECTION, return true, else false. */
2948 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
2950 if (section_is_overlay (section
))
2952 if (obj_section_addr (section
) <= pc
2953 && pc
< obj_section_endaddr (section
))
2961 /* Return true if the mapped ranges of sections A and B overlap, false
2964 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
2966 CORE_ADDR a_start
= obj_section_addr (a
);
2967 CORE_ADDR a_end
= obj_section_endaddr (a
);
2968 CORE_ADDR b_start
= obj_section_addr (b
);
2969 CORE_ADDR b_end
= obj_section_endaddr (b
);
2971 return (a_start
< b_end
&& b_start
< a_end
);
2974 /* Function: overlay_unmapped_address (PC, SECTION)
2975 Returns the address corresponding to PC in the unmapped (load) range.
2976 May be the same as PC. */
2979 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
2981 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
2983 bfd
*abfd
= section
->objfile
->obfd
;
2984 asection
*bfd_section
= section
->the_bfd_section
;
2986 return pc
+ bfd_section_lma (abfd
, bfd_section
)
2987 - bfd_section_vma (abfd
, bfd_section
);
2993 /* Function: overlay_mapped_address (PC, SECTION)
2994 Returns the address corresponding to PC in the mapped (runtime) range.
2995 May be the same as PC. */
2998 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3000 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3002 bfd
*abfd
= section
->objfile
->obfd
;
3003 asection
*bfd_section
= section
->the_bfd_section
;
3005 return pc
+ bfd_section_vma (abfd
, bfd_section
)
3006 - bfd_section_lma (abfd
, bfd_section
);
3013 /* Function: symbol_overlayed_address
3014 Return one of two addresses (relative to the VMA or to the LMA),
3015 depending on whether the section is mapped or not. */
3018 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3020 if (overlay_debugging
)
3022 /* If the symbol has no section, just return its regular address. */
3025 /* If the symbol's section is not an overlay, just return its address */
3026 if (!section_is_overlay (section
))
3028 /* If the symbol's section is mapped, just return its address */
3029 if (section_is_mapped (section
))
3032 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3033 * then return its LOADED address rather than its vma address!!
3035 return overlay_unmapped_address (address
, section
);
3040 /* Function: find_pc_overlay (PC)
3041 Return the best-match overlay section for PC:
3042 If PC matches a mapped overlay section's VMA, return that section.
3043 Else if PC matches an unmapped section's VMA, return that section.
3044 Else if PC matches an unmapped section's LMA, return that section. */
3046 struct obj_section
*
3047 find_pc_overlay (CORE_ADDR pc
)
3049 struct objfile
*objfile
;
3050 struct obj_section
*osect
, *best_match
= NULL
;
3052 if (overlay_debugging
)
3053 ALL_OBJSECTIONS (objfile
, osect
)
3054 if (section_is_overlay (osect
))
3056 if (pc_in_mapped_range (pc
, osect
))
3058 if (section_is_mapped (osect
))
3063 else if (pc_in_unmapped_range (pc
, osect
))
3069 /* Function: find_pc_mapped_section (PC)
3070 If PC falls into the VMA address range of an overlay section that is
3071 currently marked as MAPPED, return that section. Else return NULL. */
3073 struct obj_section
*
3074 find_pc_mapped_section (CORE_ADDR pc
)
3076 struct objfile
*objfile
;
3077 struct obj_section
*osect
;
3079 if (overlay_debugging
)
3080 ALL_OBJSECTIONS (objfile
, osect
)
3081 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3087 /* Function: list_overlays_command
3088 Print a list of mapped sections and their PC ranges */
3091 list_overlays_command (char *args
, int from_tty
)
3094 struct objfile
*objfile
;
3095 struct obj_section
*osect
;
3097 if (overlay_debugging
)
3098 ALL_OBJSECTIONS (objfile
, osect
)
3099 if (section_is_mapped (osect
))
3101 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3106 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3107 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3108 size
= bfd_get_section_size (osect
->the_bfd_section
);
3109 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3111 printf_filtered ("Section %s, loaded at ", name
);
3112 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3113 puts_filtered (" - ");
3114 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3115 printf_filtered (", mapped at ");
3116 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3117 puts_filtered (" - ");
3118 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3119 puts_filtered ("\n");
3124 printf_filtered (_("No sections are mapped.\n"));
3127 /* Function: map_overlay_command
3128 Mark the named section as mapped (ie. residing at its VMA address). */
3131 map_overlay_command (char *args
, int from_tty
)
3133 struct objfile
*objfile
, *objfile2
;
3134 struct obj_section
*sec
, *sec2
;
3136 if (!overlay_debugging
)
3138 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3139 the 'overlay manual' command."));
3141 if (args
== 0 || *args
== 0)
3142 error (_("Argument required: name of an overlay section"));
3144 /* First, find a section matching the user supplied argument */
3145 ALL_OBJSECTIONS (objfile
, sec
)
3146 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3148 /* Now, check to see if the section is an overlay. */
3149 if (!section_is_overlay (sec
))
3150 continue; /* not an overlay section */
3152 /* Mark the overlay as "mapped" */
3153 sec
->ovly_mapped
= 1;
3155 /* Next, make a pass and unmap any sections that are
3156 overlapped by this new section: */
3157 ALL_OBJSECTIONS (objfile2
, sec2
)
3158 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
, sec2
))
3161 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3162 bfd_section_name (objfile
->obfd
,
3163 sec2
->the_bfd_section
));
3164 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
3168 error (_("No overlay section called %s"), args
);
3171 /* Function: unmap_overlay_command
3172 Mark the overlay section as unmapped
3173 (ie. resident in its LMA address range, rather than the VMA range). */
3176 unmap_overlay_command (char *args
, int from_tty
)
3178 struct objfile
*objfile
;
3179 struct obj_section
*sec
;
3181 if (!overlay_debugging
)
3183 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3184 the 'overlay manual' command."));
3186 if (args
== 0 || *args
== 0)
3187 error (_("Argument required: name of an overlay section"));
3189 /* First, find a section matching the user supplied argument */
3190 ALL_OBJSECTIONS (objfile
, sec
)
3191 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3193 if (!sec
->ovly_mapped
)
3194 error (_("Section %s is not mapped"), args
);
3195 sec
->ovly_mapped
= 0;
3198 error (_("No overlay section called %s"), args
);
3201 /* Function: overlay_auto_command
3202 A utility command to turn on overlay debugging.
3203 Possibly this should be done via a set/show command. */
3206 overlay_auto_command (char *args
, int from_tty
)
3208 overlay_debugging
= ovly_auto
;
3209 enable_overlay_breakpoints ();
3211 printf_unfiltered (_("Automatic overlay debugging enabled."));
3214 /* Function: overlay_manual_command
3215 A utility command to turn on overlay debugging.
3216 Possibly this should be done via a set/show command. */
3219 overlay_manual_command (char *args
, int from_tty
)
3221 overlay_debugging
= ovly_on
;
3222 disable_overlay_breakpoints ();
3224 printf_unfiltered (_("Overlay debugging enabled."));
3227 /* Function: overlay_off_command
3228 A utility command to turn on overlay debugging.
3229 Possibly this should be done via a set/show command. */
3232 overlay_off_command (char *args
, int from_tty
)
3234 overlay_debugging
= ovly_off
;
3235 disable_overlay_breakpoints ();
3237 printf_unfiltered (_("Overlay debugging disabled."));
3241 overlay_load_command (char *args
, int from_tty
)
3243 struct gdbarch
*gdbarch
= get_current_arch ();
3245 if (gdbarch_overlay_update_p (gdbarch
))
3246 gdbarch_overlay_update (gdbarch
, NULL
);
3248 error (_("This target does not know how to read its overlay state."));
3251 /* Function: overlay_command
3252 A place-holder for a mis-typed command */
3254 /* Command list chain containing all defined "overlay" subcommands. */
3255 struct cmd_list_element
*overlaylist
;
3258 overlay_command (char *args
, int from_tty
)
3261 ("\"overlay\" must be followed by the name of an overlay command.\n");
3262 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3266 /* Target Overlays for the "Simplest" overlay manager:
3268 This is GDB's default target overlay layer. It works with the
3269 minimal overlay manager supplied as an example by Cygnus. The
3270 entry point is via a function pointer "gdbarch_overlay_update",
3271 so targets that use a different runtime overlay manager can
3272 substitute their own overlay_update function and take over the
3275 The overlay_update function pokes around in the target's data structures
3276 to see what overlays are mapped, and updates GDB's overlay mapping with
3279 In this simple implementation, the target data structures are as follows:
3280 unsigned _novlys; /# number of overlay sections #/
3281 unsigned _ovly_table[_novlys][4] = {
3282 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3283 {..., ..., ..., ...},
3285 unsigned _novly_regions; /# number of overlay regions #/
3286 unsigned _ovly_region_table[_novly_regions][3] = {
3287 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3290 These functions will attempt to update GDB's mappedness state in the
3291 symbol section table, based on the target's mappedness state.
3293 To do this, we keep a cached copy of the target's _ovly_table, and
3294 attempt to detect when the cached copy is invalidated. The main
3295 entry point is "simple_overlay_update(SECT), which looks up SECT in
3296 the cached table and re-reads only the entry for that section from
3297 the target (whenever possible).
3300 /* Cached, dynamically allocated copies of the target data structures: */
3301 static unsigned (*cache_ovly_table
)[4] = 0;
3302 static unsigned cache_novlys
= 0;
3303 static CORE_ADDR cache_ovly_table_base
= 0;
3306 VMA
, SIZE
, LMA
, MAPPED
3309 /* Throw away the cached copy of _ovly_table */
3311 simple_free_overlay_table (void)
3313 if (cache_ovly_table
)
3314 xfree (cache_ovly_table
);
3316 cache_ovly_table
= NULL
;
3317 cache_ovly_table_base
= 0;
3320 /* Read an array of ints of size SIZE from the target into a local buffer.
3321 Convert to host order. int LEN is number of ints */
3323 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3324 int len
, int size
, enum bfd_endian byte_order
)
3326 /* FIXME (alloca): Not safe if array is very large. */
3327 gdb_byte
*buf
= alloca (len
* size
);
3330 read_memory (memaddr
, buf
, len
* size
);
3331 for (i
= 0; i
< len
; i
++)
3332 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3335 /* Find and grab a copy of the target _ovly_table
3336 (and _novlys, which is needed for the table's size) */
3338 simple_read_overlay_table (void)
3340 struct minimal_symbol
*novlys_msym
, *ovly_table_msym
;
3341 struct gdbarch
*gdbarch
;
3343 enum bfd_endian byte_order
;
3345 simple_free_overlay_table ();
3346 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3349 error (_("Error reading inferior's overlay table: "
3350 "couldn't find `_novlys' variable\n"
3351 "in inferior. Use `overlay manual' mode."));
3355 ovly_table_msym
= lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3356 if (! ovly_table_msym
)
3358 error (_("Error reading inferior's overlay table: couldn't find "
3359 "`_ovly_table' array\n"
3360 "in inferior. Use `overlay manual' mode."));
3364 gdbarch
= get_objfile_arch (msymbol_objfile (ovly_table_msym
));
3365 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3366 byte_order
= gdbarch_byte_order (gdbarch
);
3368 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
),
3371 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3372 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3373 read_target_long_array (cache_ovly_table_base
,
3374 (unsigned int *) cache_ovly_table
,
3375 cache_novlys
* 4, word_size
, byte_order
);
3377 return 1; /* SUCCESS */
3380 /* Function: simple_overlay_update_1
3381 A helper function for simple_overlay_update. Assuming a cached copy
3382 of _ovly_table exists, look through it to find an entry whose vma,
3383 lma and size match those of OSECT. Re-read the entry and make sure
3384 it still matches OSECT (else the table may no longer be valid).
3385 Set OSECT's mapped state to match the entry. Return: 1 for
3386 success, 0 for failure. */
3389 simple_overlay_update_1 (struct obj_section
*osect
)
3392 bfd
*obfd
= osect
->objfile
->obfd
;
3393 asection
*bsect
= osect
->the_bfd_section
;
3394 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3395 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3396 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3398 size
= bfd_get_section_size (osect
->the_bfd_section
);
3399 for (i
= 0; i
< cache_novlys
; i
++)
3400 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3401 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3402 /* && cache_ovly_table[i][SIZE] == size */ )
3404 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3405 (unsigned int *) cache_ovly_table
[i
],
3406 4, word_size
, byte_order
);
3407 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3408 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3409 /* && cache_ovly_table[i][SIZE] == size */ )
3411 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3414 else /* Warning! Warning! Target's ovly table has changed! */
3420 /* Function: simple_overlay_update
3421 If OSECT is NULL, then update all sections' mapped state
3422 (after re-reading the entire target _ovly_table).
3423 If OSECT is non-NULL, then try to find a matching entry in the
3424 cached ovly_table and update only OSECT's mapped state.
3425 If a cached entry can't be found or the cache isn't valid, then
3426 re-read the entire cache, and go ahead and update all sections. */
3429 simple_overlay_update (struct obj_section
*osect
)
3431 struct objfile
*objfile
;
3433 /* Were we given an osect to look up? NULL means do all of them. */
3435 /* Have we got a cached copy of the target's overlay table? */
3436 if (cache_ovly_table
!= NULL
)
3437 /* Does its cached location match what's currently in the symtab? */
3438 if (cache_ovly_table_base
==
3439 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL
, NULL
)))
3440 /* Then go ahead and try to look up this single section in the cache */
3441 if (simple_overlay_update_1 (osect
))
3442 /* Found it! We're done. */
3445 /* Cached table no good: need to read the entire table anew.
3446 Or else we want all the sections, in which case it's actually
3447 more efficient to read the whole table in one block anyway. */
3449 if (! simple_read_overlay_table ())
3452 /* Now may as well update all sections, even if only one was requested. */
3453 ALL_OBJSECTIONS (objfile
, osect
)
3454 if (section_is_overlay (osect
))
3457 bfd
*obfd
= osect
->objfile
->obfd
;
3458 asection
*bsect
= osect
->the_bfd_section
;
3460 size
= bfd_get_section_size (bsect
);
3461 for (i
= 0; i
< cache_novlys
; i
++)
3462 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3463 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3464 /* && cache_ovly_table[i][SIZE] == size */ )
3465 { /* obj_section matches i'th entry in ovly_table */
3466 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3467 break; /* finished with inner for loop: break out */
3472 /* Set the output sections and output offsets for section SECTP in
3473 ABFD. The relocation code in BFD will read these offsets, so we
3474 need to be sure they're initialized. We map each section to itself,
3475 with no offset; this means that SECTP->vma will be honored. */
3478 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3480 sectp
->output_section
= sectp
;
3481 sectp
->output_offset
= 0;
3484 /* Default implementation for sym_relocate. */
3488 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3491 bfd
*abfd
= objfile
->obfd
;
3493 /* We're only interested in sections with relocation
3495 if ((sectp
->flags
& SEC_RELOC
) == 0)
3498 /* We will handle section offsets properly elsewhere, so relocate as if
3499 all sections begin at 0. */
3500 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3502 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3505 /* Relocate the contents of a debug section SECTP in ABFD. The
3506 contents are stored in BUF if it is non-NULL, or returned in a
3507 malloc'd buffer otherwise.
3509 For some platforms and debug info formats, shared libraries contain
3510 relocations against the debug sections (particularly for DWARF-2;
3511 one affected platform is PowerPC GNU/Linux, although it depends on
3512 the version of the linker in use). Also, ELF object files naturally
3513 have unresolved relocations for their debug sections. We need to apply
3514 the relocations in order to get the locations of symbols correct.
3515 Another example that may require relocation processing, is the
3516 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3520 symfile_relocate_debug_section (struct objfile
*objfile
,
3521 asection
*sectp
, bfd_byte
*buf
)
3523 gdb_assert (objfile
->sf
->sym_relocate
);
3525 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3528 struct symfile_segment_data
*
3529 get_symfile_segment_data (bfd
*abfd
)
3531 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3536 return sf
->sym_segments (abfd
);
3540 free_symfile_segment_data (struct symfile_segment_data
*data
)
3542 xfree (data
->segment_bases
);
3543 xfree (data
->segment_sizes
);
3544 xfree (data
->segment_info
);
3550 - DATA, containing segment addresses from the object file ABFD, and
3551 the mapping from ABFD's sections onto the segments that own them,
3553 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3554 segment addresses reported by the target,
3555 store the appropriate offsets for each section in OFFSETS.
3557 If there are fewer entries in SEGMENT_BASES than there are segments
3558 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3560 If there are more entries, then ignore the extra. The target may
3561 not be able to distinguish between an empty data segment and a
3562 missing data segment; a missing text segment is less plausible. */
3564 symfile_map_offsets_to_segments (bfd
*abfd
, struct symfile_segment_data
*data
,
3565 struct section_offsets
*offsets
,
3566 int num_segment_bases
,
3567 const CORE_ADDR
*segment_bases
)
3572 /* It doesn't make sense to call this function unless you have some
3573 segment base addresses. */
3574 gdb_assert (num_segment_bases
> 0);
3576 /* If we do not have segment mappings for the object file, we
3577 can not relocate it by segments. */
3578 gdb_assert (data
!= NULL
);
3579 gdb_assert (data
->num_segments
> 0);
3581 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3583 int which
= data
->segment_info
[i
];
3585 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
3587 /* Don't bother computing offsets for sections that aren't
3588 loaded as part of any segment. */
3592 /* Use the last SEGMENT_BASES entry as the address of any extra
3593 segments mentioned in DATA->segment_info. */
3594 if (which
> num_segment_bases
)
3595 which
= num_segment_bases
;
3597 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
3598 - data
->segment_bases
[which
- 1]);
3605 symfile_find_segment_sections (struct objfile
*objfile
)
3607 bfd
*abfd
= objfile
->obfd
;
3610 struct symfile_segment_data
*data
;
3612 data
= get_symfile_segment_data (objfile
->obfd
);
3616 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
3618 free_symfile_segment_data (data
);
3622 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3624 int which
= data
->segment_info
[i
];
3628 if (objfile
->sect_index_text
== -1)
3629 objfile
->sect_index_text
= sect
->index
;
3631 if (objfile
->sect_index_rodata
== -1)
3632 objfile
->sect_index_rodata
= sect
->index
;
3634 else if (which
== 2)
3636 if (objfile
->sect_index_data
== -1)
3637 objfile
->sect_index_data
= sect
->index
;
3639 if (objfile
->sect_index_bss
== -1)
3640 objfile
->sect_index_bss
= sect
->index
;
3644 free_symfile_segment_data (data
);
3648 _initialize_symfile (void)
3650 struct cmd_list_element
*c
;
3652 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3653 Load symbol table from executable file FILE.\n\
3654 The `file' command can also load symbol tables, as well as setting the file\n\
3655 to execute."), &cmdlist
);
3656 set_cmd_completer (c
, filename_completer
);
3658 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3659 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3660 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3661 ADDR is the starting address of the file's text.\n\
3662 The optional arguments are section-name section-address pairs and\n\
3663 should be specified if the data and bss segments are not contiguous\n\
3664 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3666 set_cmd_completer (c
, filename_completer
);
3668 c
= add_cmd ("load", class_files
, load_command
, _("\
3669 Dynamically load FILE into the running program, and record its symbols\n\
3670 for access from GDB.\n\
3671 A load OFFSET may also be given."), &cmdlist
);
3672 set_cmd_completer (c
, filename_completer
);
3674 add_setshow_boolean_cmd ("symbol-reloading", class_support
,
3675 &symbol_reloading
, _("\
3676 Set dynamic symbol table reloading multiple times in one run."), _("\
3677 Show dynamic symbol table reloading multiple times in one run."), NULL
,
3679 show_symbol_reloading
,
3680 &setlist
, &showlist
);
3682 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3683 _("Commands for debugging overlays."), &overlaylist
,
3684 "overlay ", 0, &cmdlist
);
3686 add_com_alias ("ovly", "overlay", class_alias
, 1);
3687 add_com_alias ("ov", "overlay", class_alias
, 1);
3689 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3690 _("Assert that an overlay section is mapped."), &overlaylist
);
3692 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3693 _("Assert that an overlay section is unmapped."), &overlaylist
);
3695 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3696 _("List mappings of overlay sections."), &overlaylist
);
3698 add_cmd ("manual", class_support
, overlay_manual_command
,
3699 _("Enable overlay debugging."), &overlaylist
);
3700 add_cmd ("off", class_support
, overlay_off_command
,
3701 _("Disable overlay debugging."), &overlaylist
);
3702 add_cmd ("auto", class_support
, overlay_auto_command
,
3703 _("Enable automatic overlay debugging."), &overlaylist
);
3704 add_cmd ("load-target", class_support
, overlay_load_command
,
3705 _("Read the overlay mapping state from the target."), &overlaylist
);
3707 /* Filename extension to source language lookup table: */
3708 init_filename_language_table ();
3709 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3711 Set mapping between filename extension and source language."), _("\
3712 Show mapping between filename extension and source language."), _("\
3713 Usage: set extension-language .foo bar"),
3714 set_ext_lang_command
,
3716 &setlist
, &showlist
);
3718 add_info ("extensions", info_ext_lang_command
,
3719 _("All filename extensions associated with a source language."));
3721 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3722 &debug_file_directory
, _("\
3723 Set the directories where separate debug symbols are searched for."), _("\
3724 Show the directories where separate debug symbols are searched for."), _("\
3725 Separate debug symbols are first searched for in the same\n\
3726 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3727 and lastly at the path of the directory of the binary with\n\
3728 each global debug-file-directory component prepended."),
3730 show_debug_file_directory
,
3731 &setlist
, &showlist
);