1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
5 Free Software Foundation, Inc.
7 Contributed by Cygnus Support, using pieces from other GDB modules.
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>. */
25 #include "arch-utils.h"
37 #include "breakpoint.h"
39 #include "complaints.h"
43 #include "filenames.h" /* for DOSish file names */
44 #include "gdb-stabs.h"
45 #include "gdb_obstack.h"
46 #include "completer.h"
49 #include "readline/readline.h"
50 #include "gdb_assert.h"
54 #include "parser-defs.h"
60 #include <sys/types.h>
62 #include "gdb_string.h"
70 int (*deprecated_ui_load_progress_hook
) (const char *section
,
72 void (*deprecated_show_load_progress
) (const char *section
,
73 unsigned long section_sent
,
74 unsigned long section_size
,
75 unsigned long total_sent
,
76 unsigned long total_size
);
77 void (*deprecated_pre_add_symbol_hook
) (const char *);
78 void (*deprecated_post_add_symbol_hook
) (void);
80 static void clear_symtab_users_cleanup (void *ignore
);
82 /* Global variables owned by this file */
83 int readnow_symbol_files
; /* Read full symbols immediately */
85 /* External variables and functions referenced. */
87 extern void report_transfer_performance (unsigned long, time_t, time_t);
89 /* Functions this file defines */
91 static void load_command (char *, int);
93 static void symbol_file_add_main_1 (char *args
, int from_tty
, int flags
);
95 static void add_symbol_file_command (char *, int);
97 bfd
*symfile_bfd_open (char *);
99 int get_section_index (struct objfile
*, char *);
101 static const struct sym_fns
*find_sym_fns (bfd
*);
103 static void decrement_reading_symtab (void *);
105 static void overlay_invalidate_all (void);
107 void list_overlays_command (char *, int);
109 void map_overlay_command (char *, int);
111 void unmap_overlay_command (char *, int);
113 static void overlay_auto_command (char *, int);
115 static void overlay_manual_command (char *, int);
117 static void overlay_off_command (char *, int);
119 static void overlay_load_command (char *, int);
121 static void overlay_command (char *, int);
123 static void simple_free_overlay_table (void);
125 static void read_target_long_array (CORE_ADDR
, unsigned int *, int, int,
128 static int simple_read_overlay_table (void);
130 static int simple_overlay_update_1 (struct obj_section
*);
132 static void add_filename_language (char *ext
, enum language lang
);
134 static void info_ext_lang_command (char *args
, int from_tty
);
136 static void init_filename_language_table (void);
138 static void symfile_find_segment_sections (struct objfile
*objfile
);
140 void _initialize_symfile (void);
142 /* List of all available sym_fns. On gdb startup, each object file reader
143 calls add_symtab_fns() to register information on each format it is
146 typedef const struct sym_fns
*sym_fns_ptr
;
147 DEF_VEC_P (sym_fns_ptr
);
149 static VEC (sym_fns_ptr
) *symtab_fns
= NULL
;
151 /* Flag for whether user will be reloading symbols multiple times.
152 Defaults to ON for VxWorks, otherwise OFF. */
154 #ifdef SYMBOL_RELOADING_DEFAULT
155 int symbol_reloading
= SYMBOL_RELOADING_DEFAULT
;
157 int symbol_reloading
= 0;
160 show_symbol_reloading (struct ui_file
*file
, int from_tty
,
161 struct cmd_list_element
*c
, const char *value
)
163 fprintf_filtered (file
, _("Dynamic symbol table reloading "
164 "multiple times in one run is %s.\n"),
168 /* If non-zero, shared library symbols will be added automatically
169 when the inferior is created, new libraries are loaded, or when
170 attaching to the inferior. This is almost always what users will
171 want to have happen; but for very large programs, the startup time
172 will be excessive, and so if this is a problem, the user can clear
173 this flag and then add the shared library symbols as needed. Note
174 that there is a potential for confusion, since if the shared
175 library symbols are not loaded, commands like "info fun" will *not*
176 report all the functions that are actually present. */
178 int auto_solib_add
= 1;
180 /* For systems that support it, a threshold size in megabytes. If
181 automatically adding a new library's symbol table to those already
182 known to the debugger would cause the total shared library symbol
183 size to exceed this threshhold, then the shlib's symbols are not
184 added. The threshold is ignored if the user explicitly asks for a
185 shlib to be added, such as when using the "sharedlibrary"
188 int auto_solib_limit
;
191 /* Make a null terminated copy of the string at PTR with SIZE characters in
192 the obstack pointed to by OBSTACKP . Returns the address of the copy.
193 Note that the string at PTR does not have to be null terminated, I.E. it
194 may be part of a larger string and we are only saving a substring. */
197 obsavestring (const char *ptr
, int size
, struct obstack
*obstackp
)
199 char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
200 /* Open-coded memcpy--saves function call time. These strings are usually
201 short. FIXME: Is this really still true with a compiler that can
204 const char *p1
= ptr
;
206 const char *end
= ptr
+ size
;
215 /* Concatenate NULL terminated variable argument list of `const char *'
216 strings; return the new string. Space is found in the OBSTACKP.
217 Argument list must be terminated by a sentinel expression `(char *)
221 obconcat (struct obstack
*obstackp
, ...)
225 va_start (ap
, obstackp
);
228 const char *s
= va_arg (ap
, const char *);
233 obstack_grow_str (obstackp
, s
);
236 obstack_1grow (obstackp
, 0);
238 return obstack_finish (obstackp
);
241 /* True if we are reading a symbol table. */
243 int currently_reading_symtab
= 0;
246 decrement_reading_symtab (void *dummy
)
248 currently_reading_symtab
--;
251 /* Increment currently_reading_symtab and return a cleanup that can be
252 used to decrement it. */
254 increment_reading_symtab (void)
256 ++currently_reading_symtab
;
257 return make_cleanup (decrement_reading_symtab
, NULL
);
260 /* Remember the lowest-addressed loadable section we've seen.
261 This function is called via bfd_map_over_sections.
263 In case of equal vmas, the section with the largest size becomes the
264 lowest-addressed loadable section.
266 If the vmas and sizes are equal, the last section is considered the
267 lowest-addressed loadable section. */
270 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
272 asection
**lowest
= (asection
**) obj
;
274 if (0 == (bfd_get_section_flags (abfd
, sect
) & (SEC_ALLOC
| SEC_LOAD
)))
277 *lowest
= sect
; /* First loadable section */
278 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
279 *lowest
= sect
; /* A lower loadable section */
280 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
281 && (bfd_section_size (abfd
, (*lowest
))
282 <= bfd_section_size (abfd
, sect
)))
286 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
288 struct section_addr_info
*
289 alloc_section_addr_info (size_t num_sections
)
291 struct section_addr_info
*sap
;
294 size
= (sizeof (struct section_addr_info
)
295 + sizeof (struct other_sections
) * (num_sections
- 1));
296 sap
= (struct section_addr_info
*) xmalloc (size
);
297 memset (sap
, 0, size
);
298 sap
->num_sections
= num_sections
;
303 /* Build (allocate and populate) a section_addr_info struct from
304 an existing section table. */
306 extern struct section_addr_info
*
307 build_section_addr_info_from_section_table (const struct target_section
*start
,
308 const struct target_section
*end
)
310 struct section_addr_info
*sap
;
311 const struct target_section
*stp
;
314 sap
= alloc_section_addr_info (end
- start
);
316 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
318 if (bfd_get_section_flags (stp
->bfd
,
319 stp
->the_bfd_section
) & (SEC_ALLOC
| SEC_LOAD
)
320 && oidx
< end
- start
)
322 sap
->other
[oidx
].addr
= stp
->addr
;
323 sap
->other
[oidx
].name
324 = xstrdup (bfd_section_name (stp
->bfd
, stp
->the_bfd_section
));
325 sap
->other
[oidx
].sectindex
= stp
->the_bfd_section
->index
;
333 /* Create a section_addr_info from section offsets in ABFD. */
335 static struct section_addr_info
*
336 build_section_addr_info_from_bfd (bfd
*abfd
)
338 struct section_addr_info
*sap
;
340 struct bfd_section
*sec
;
342 sap
= alloc_section_addr_info (bfd_count_sections (abfd
));
343 for (i
= 0, sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
344 if (bfd_get_section_flags (abfd
, sec
) & (SEC_ALLOC
| SEC_LOAD
))
346 sap
->other
[i
].addr
= bfd_get_section_vma (abfd
, sec
);
347 sap
->other
[i
].name
= xstrdup (bfd_get_section_name (abfd
, sec
));
348 sap
->other
[i
].sectindex
= sec
->index
;
354 /* Create a section_addr_info from section offsets in OBJFILE. */
356 struct section_addr_info
*
357 build_section_addr_info_from_objfile (const struct objfile
*objfile
)
359 struct section_addr_info
*sap
;
362 /* Before reread_symbols gets rewritten it is not safe to call:
363 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
365 sap
= build_section_addr_info_from_bfd (objfile
->obfd
);
366 for (i
= 0; i
< sap
->num_sections
&& sap
->other
[i
].name
; i
++)
368 int sectindex
= sap
->other
[i
].sectindex
;
370 sap
->other
[i
].addr
+= objfile
->section_offsets
->offsets
[sectindex
];
375 /* Free all memory allocated by build_section_addr_info_from_section_table. */
378 free_section_addr_info (struct section_addr_info
*sap
)
382 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
383 if (sap
->other
[idx
].name
)
384 xfree (sap
->other
[idx
].name
);
389 /* Initialize OBJFILE's sect_index_* members. */
391 init_objfile_sect_indices (struct objfile
*objfile
)
396 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
398 objfile
->sect_index_text
= sect
->index
;
400 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
402 objfile
->sect_index_data
= sect
->index
;
404 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
406 objfile
->sect_index_bss
= sect
->index
;
408 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
410 objfile
->sect_index_rodata
= sect
->index
;
412 /* This is where things get really weird... We MUST have valid
413 indices for the various sect_index_* members or gdb will abort.
414 So if for example, there is no ".text" section, we have to
415 accomodate that. First, check for a file with the standard
416 one or two segments. */
418 symfile_find_segment_sections (objfile
);
420 /* Except when explicitly adding symbol files at some address,
421 section_offsets contains nothing but zeros, so it doesn't matter
422 which slot in section_offsets the individual sect_index_* members
423 index into. So if they are all zero, it is safe to just point
424 all the currently uninitialized indices to the first slot. But
425 beware: if this is the main executable, it may be relocated
426 later, e.g. by the remote qOffsets packet, and then this will
427 be wrong! That's why we try segments first. */
429 for (i
= 0; i
< objfile
->num_sections
; i
++)
431 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
436 if (i
== objfile
->num_sections
)
438 if (objfile
->sect_index_text
== -1)
439 objfile
->sect_index_text
= 0;
440 if (objfile
->sect_index_data
== -1)
441 objfile
->sect_index_data
= 0;
442 if (objfile
->sect_index_bss
== -1)
443 objfile
->sect_index_bss
= 0;
444 if (objfile
->sect_index_rodata
== -1)
445 objfile
->sect_index_rodata
= 0;
449 /* The arguments to place_section. */
451 struct place_section_arg
453 struct section_offsets
*offsets
;
457 /* Find a unique offset to use for loadable section SECT if
458 the user did not provide an offset. */
461 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
463 struct place_section_arg
*arg
= obj
;
464 CORE_ADDR
*offsets
= arg
->offsets
->offsets
, start_addr
;
466 ULONGEST align
= ((ULONGEST
) 1) << bfd_get_section_alignment (abfd
, sect
);
468 /* We are only interested in allocated sections. */
469 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
472 /* If the user specified an offset, honor it. */
473 if (offsets
[sect
->index
] != 0)
476 /* Otherwise, let's try to find a place for the section. */
477 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
484 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
486 int indx
= cur_sec
->index
;
488 /* We don't need to compare against ourself. */
492 /* We can only conflict with allocated sections. */
493 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
496 /* If the section offset is 0, either the section has not been placed
497 yet, or it was the lowest section placed (in which case LOWEST
498 will be past its end). */
499 if (offsets
[indx
] == 0)
502 /* If this section would overlap us, then we must move up. */
503 if (start_addr
+ bfd_get_section_size (sect
) > offsets
[indx
]
504 && start_addr
< offsets
[indx
] + bfd_get_section_size (cur_sec
))
506 start_addr
= offsets
[indx
] + bfd_get_section_size (cur_sec
);
507 start_addr
= (start_addr
+ align
- 1) & -align
;
512 /* Otherwise, we appear to be OK. So far. */
517 offsets
[sect
->index
] = start_addr
;
518 arg
->lowest
= start_addr
+ bfd_get_section_size (sect
);
521 /* Store struct section_addr_info as prepared (made relative and with SECTINDEX
522 filled-in) by addr_info_make_relative into SECTION_OFFSETS of NUM_SECTIONS
526 relative_addr_info_to_section_offsets (struct section_offsets
*section_offsets
,
528 struct section_addr_info
*addrs
)
532 memset (section_offsets
, 0, SIZEOF_N_SECTION_OFFSETS (num_sections
));
534 /* Now calculate offsets for section that were specified by the caller. */
535 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
537 struct other_sections
*osp
;
539 osp
= &addrs
->other
[i
];
543 /* Record all sections in offsets */
544 /* The section_offsets in the objfile are here filled in using
546 section_offsets
->offsets
[osp
->sectindex
] = osp
->addr
;
550 /* Transform section name S for a name comparison. prelink can split section
551 `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly
552 prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address
553 of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss'
554 (`.sbss') section has invalid (increased) virtual address. */
557 addr_section_name (const char *s
)
559 if (strcmp (s
, ".dynbss") == 0)
561 if (strcmp (s
, ".sdynbss") == 0)
567 /* qsort comparator for addrs_section_sort. Sort entries in ascending order by
568 their (name, sectindex) pair. sectindex makes the sort by name stable. */
571 addrs_section_compar (const void *ap
, const void *bp
)
573 const struct other_sections
*a
= *((struct other_sections
**) ap
);
574 const struct other_sections
*b
= *((struct other_sections
**) bp
);
575 int retval
, a_idx
, b_idx
;
577 retval
= strcmp (addr_section_name (a
->name
), addr_section_name (b
->name
));
581 /* SECTINDEX is undefined iff ADDR is zero. */
582 a_idx
= a
->addr
== 0 ? 0 : a
->sectindex
;
583 b_idx
= b
->addr
== 0 ? 0 : b
->sectindex
;
584 return a_idx
- b_idx
;
587 /* Provide sorted array of pointers to sections of ADDRS. The array is
588 terminated by NULL. Caller is responsible to call xfree for it. */
590 static struct other_sections
**
591 addrs_section_sort (struct section_addr_info
*addrs
)
593 struct other_sections
**array
;
596 /* `+ 1' for the NULL terminator. */
597 array
= xmalloc (sizeof (*array
) * (addrs
->num_sections
+ 1));
598 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
599 array
[i
] = &addrs
->other
[i
];
602 qsort (array
, i
, sizeof (*array
), addrs_section_compar
);
607 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
608 also SECTINDEXes specific to ABFD there. This function can be used to
609 rebase ADDRS to start referencing different BFD than before. */
612 addr_info_make_relative (struct section_addr_info
*addrs
, bfd
*abfd
)
614 asection
*lower_sect
;
615 CORE_ADDR lower_offset
;
617 struct cleanup
*my_cleanup
;
618 struct section_addr_info
*abfd_addrs
;
619 struct other_sections
**addrs_sorted
, **abfd_addrs_sorted
;
620 struct other_sections
**addrs_to_abfd_addrs
;
622 /* Find lowest loadable section to be used as starting point for
623 continguous sections. */
625 bfd_map_over_sections (abfd
, find_lowest_section
, &lower_sect
);
626 if (lower_sect
== NULL
)
628 warning (_("no loadable sections found in added symbol-file %s"),
629 bfd_get_filename (abfd
));
633 lower_offset
= bfd_section_vma (bfd_get_filename (abfd
), lower_sect
);
635 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
636 in ABFD. Section names are not unique - there can be multiple sections of
637 the same name. Also the sections of the same name do not have to be
638 adjacent to each other. Some sections may be present only in one of the
639 files. Even sections present in both files do not have to be in the same
642 Use stable sort by name for the sections in both files. Then linearly
643 scan both lists matching as most of the entries as possible. */
645 addrs_sorted
= addrs_section_sort (addrs
);
646 my_cleanup
= make_cleanup (xfree
, addrs_sorted
);
648 abfd_addrs
= build_section_addr_info_from_bfd (abfd
);
649 make_cleanup_free_section_addr_info (abfd_addrs
);
650 abfd_addrs_sorted
= addrs_section_sort (abfd_addrs
);
651 make_cleanup (xfree
, abfd_addrs_sorted
);
653 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and ABFD_ADDRS_SORTED. */
655 addrs_to_abfd_addrs
= xzalloc (sizeof (*addrs_to_abfd_addrs
)
656 * addrs
->num_sections
);
657 make_cleanup (xfree
, addrs_to_abfd_addrs
);
659 while (*addrs_sorted
)
661 const char *sect_name
= addr_section_name ((*addrs_sorted
)->name
);
663 while (*abfd_addrs_sorted
664 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
668 if (*abfd_addrs_sorted
669 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
674 /* Make the found item directly addressable from ADDRS. */
675 index_in_addrs
= *addrs_sorted
- addrs
->other
;
676 gdb_assert (addrs_to_abfd_addrs
[index_in_addrs
] == NULL
);
677 addrs_to_abfd_addrs
[index_in_addrs
] = *abfd_addrs_sorted
;
679 /* Never use the same ABFD entry twice. */
686 /* Calculate offsets for the loadable sections.
687 FIXME! Sections must be in order of increasing loadable section
688 so that contiguous sections can use the lower-offset!!!
690 Adjust offsets if the segments are not contiguous.
691 If the section is contiguous, its offset should be set to
692 the offset of the highest loadable section lower than it
693 (the loadable section directly below it in memory).
694 this_offset = lower_offset = lower_addr - lower_orig_addr */
696 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
698 struct other_sections
*sect
= addrs_to_abfd_addrs
[i
];
702 /* This is the index used by BFD. */
703 addrs
->other
[i
].sectindex
= sect
->sectindex
;
705 if (addrs
->other
[i
].addr
!= 0)
707 addrs
->other
[i
].addr
-= sect
->addr
;
708 lower_offset
= addrs
->other
[i
].addr
;
711 addrs
->other
[i
].addr
= lower_offset
;
715 /* addr_section_name transformation is not used for SECT_NAME. */
716 const char *sect_name
= addrs
->other
[i
].name
;
718 /* This section does not exist in ABFD, which is normally
719 unexpected and we want to issue a warning.
721 However, the ELF prelinker does create a few sections which are
722 marked in the main executable as loadable (they are loaded in
723 memory from the DYNAMIC segment) and yet are not present in
724 separate debug info files. This is fine, and should not cause
725 a warning. Shared libraries contain just the section
726 ".gnu.liblist" but it is not marked as loadable there. There is
727 no other way to identify them than by their name as the sections
728 created by prelink have no special flags.
730 For the sections `.bss' and `.sbss' see addr_section_name. */
732 if (!(strcmp (sect_name
, ".gnu.liblist") == 0
733 || strcmp (sect_name
, ".gnu.conflict") == 0
734 || (strcmp (sect_name
, ".bss") == 0
736 && strcmp (addrs
->other
[i
- 1].name
, ".dynbss") == 0
737 && addrs_to_abfd_addrs
[i
- 1] != NULL
)
738 || (strcmp (sect_name
, ".sbss") == 0
740 && strcmp (addrs
->other
[i
- 1].name
, ".sdynbss") == 0
741 && addrs_to_abfd_addrs
[i
- 1] != NULL
)))
742 warning (_("section %s not found in %s"), sect_name
,
743 bfd_get_filename (abfd
));
745 addrs
->other
[i
].addr
= 0;
747 /* SECTINDEX is invalid if ADDR is zero. */
751 do_cleanups (my_cleanup
);
754 /* Parse the user's idea of an offset for dynamic linking, into our idea
755 of how to represent it for fast symbol reading. This is the default
756 version of the sym_fns.sym_offsets function for symbol readers that
757 don't need to do anything special. It allocates a section_offsets table
758 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
761 default_symfile_offsets (struct objfile
*objfile
,
762 struct section_addr_info
*addrs
)
764 objfile
->num_sections
= bfd_count_sections (objfile
->obfd
);
765 objfile
->section_offsets
= (struct section_offsets
*)
766 obstack_alloc (&objfile
->objfile_obstack
,
767 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
768 relative_addr_info_to_section_offsets (objfile
->section_offsets
,
769 objfile
->num_sections
, addrs
);
771 /* For relocatable files, all loadable sections will start at zero.
772 The zero is meaningless, so try to pick arbitrary addresses such
773 that no loadable sections overlap. This algorithm is quadratic,
774 but the number of sections in a single object file is generally
776 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
778 struct place_section_arg arg
;
779 bfd
*abfd
= objfile
->obfd
;
782 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
783 /* We do not expect this to happen; just skip this step if the
784 relocatable file has a section with an assigned VMA. */
785 if (bfd_section_vma (abfd
, cur_sec
) != 0)
790 CORE_ADDR
*offsets
= objfile
->section_offsets
->offsets
;
792 /* Pick non-overlapping offsets for sections the user did not
794 arg
.offsets
= objfile
->section_offsets
;
796 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
798 /* Correctly filling in the section offsets is not quite
799 enough. Relocatable files have two properties that
800 (most) shared objects do not:
802 - Their debug information will contain relocations. Some
803 shared libraries do also, but many do not, so this can not
806 - If there are multiple code sections they will be loaded
807 at different relative addresses in memory than they are
808 in the objfile, since all sections in the file will start
811 Because GDB has very limited ability to map from an
812 address in debug info to the correct code section,
813 it relies on adding SECT_OFF_TEXT to things which might be
814 code. If we clear all the section offsets, and set the
815 section VMAs instead, then symfile_relocate_debug_section
816 will return meaningful debug information pointing at the
819 GDB has too many different data structures for section
820 addresses - a bfd, objfile, and so_list all have section
821 tables, as does exec_ops. Some of these could probably
824 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
825 cur_sec
= cur_sec
->next
)
827 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
830 bfd_set_section_vma (abfd
, cur_sec
, offsets
[cur_sec
->index
]);
831 exec_set_section_address (bfd_get_filename (abfd
),
833 offsets
[cur_sec
->index
]);
834 offsets
[cur_sec
->index
] = 0;
839 /* Remember the bfd indexes for the .text, .data, .bss and
841 init_objfile_sect_indices (objfile
);
845 /* Divide the file into segments, which are individual relocatable units.
846 This is the default version of the sym_fns.sym_segments function for
847 symbol readers that do not have an explicit representation of segments.
848 It assumes that object files do not have segments, and fully linked
849 files have a single segment. */
851 struct symfile_segment_data
*
852 default_symfile_segments (bfd
*abfd
)
856 struct symfile_segment_data
*data
;
859 /* Relocatable files contain enough information to position each
860 loadable section independently; they should not be relocated
862 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
865 /* Make sure there is at least one loadable section in the file. */
866 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
868 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
876 low
= bfd_get_section_vma (abfd
, sect
);
877 high
= low
+ bfd_get_section_size (sect
);
879 data
= XZALLOC (struct symfile_segment_data
);
880 data
->num_segments
= 1;
881 data
->segment_bases
= XCALLOC (1, CORE_ADDR
);
882 data
->segment_sizes
= XCALLOC (1, CORE_ADDR
);
884 num_sections
= bfd_count_sections (abfd
);
885 data
->segment_info
= XCALLOC (num_sections
, int);
887 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
891 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
894 vma
= bfd_get_section_vma (abfd
, sect
);
897 if (vma
+ bfd_get_section_size (sect
) > high
)
898 high
= vma
+ bfd_get_section_size (sect
);
900 data
->segment_info
[i
] = 1;
903 data
->segment_bases
[0] = low
;
904 data
->segment_sizes
[0] = high
- low
;
909 /* Process a symbol file, as either the main file or as a dynamically
912 OBJFILE is where the symbols are to be read from.
914 ADDRS is the list of section load addresses. If the user has given
915 an 'add-symbol-file' command, then this is the list of offsets and
916 addresses he or she provided as arguments to the command; or, if
917 we're handling a shared library, these are the actual addresses the
918 sections are loaded at, according to the inferior's dynamic linker
919 (as gleaned by GDB's shared library code). We convert each address
920 into an offset from the section VMA's as it appears in the object
921 file, and then call the file's sym_offsets function to convert this
922 into a format-specific offset table --- a `struct section_offsets'.
923 If ADDRS is non-zero, OFFSETS must be zero.
925 OFFSETS is a table of section offsets already in the right
926 format-specific representation. NUM_OFFSETS is the number of
927 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
928 assume this is the proper table the call to sym_offsets described
929 above would produce. Instead of calling sym_offsets, we just dump
930 it right into objfile->section_offsets. (When we're re-reading
931 symbols from an objfile, we don't have the original load address
932 list any more; all we have is the section offset table.) If
933 OFFSETS is non-zero, ADDRS must be zero.
935 ADD_FLAGS encodes verbosity level, whether this is main symbol or
936 an extra symbol file such as dynamically loaded code, and wether
937 breakpoint reset should be deferred. */
940 syms_from_objfile (struct objfile
*objfile
,
941 struct section_addr_info
*addrs
,
942 struct section_offsets
*offsets
,
946 struct section_addr_info
*local_addr
= NULL
;
947 struct cleanup
*old_chain
;
948 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
950 gdb_assert (! (addrs
&& offsets
));
952 init_entry_point_info (objfile
);
953 objfile
->sf
= find_sym_fns (objfile
->obfd
);
955 if (objfile
->sf
== NULL
)
956 return; /* No symbols. */
958 /* Make sure that partially constructed symbol tables will be cleaned up
959 if an error occurs during symbol reading. */
960 old_chain
= make_cleanup_free_objfile (objfile
);
962 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
963 list. We now establish the convention that an addr of zero means
964 no load address was specified. */
965 if (! addrs
&& ! offsets
)
968 = alloc_section_addr_info (bfd_count_sections (objfile
->obfd
));
969 make_cleanup (xfree
, local_addr
);
973 /* Now either addrs or offsets is non-zero. */
977 /* We will modify the main symbol table, make sure that all its users
978 will be cleaned up if an error occurs during symbol reading. */
979 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
981 /* Since no error yet, throw away the old symbol table. */
983 if (symfile_objfile
!= NULL
)
985 free_objfile (symfile_objfile
);
986 gdb_assert (symfile_objfile
== NULL
);
989 /* Currently we keep symbols from the add-symbol-file command.
990 If the user wants to get rid of them, they should do "symbol-file"
991 without arguments first. Not sure this is the best behavior
994 (*objfile
->sf
->sym_new_init
) (objfile
);
997 /* Convert addr into an offset rather than an absolute address.
998 We find the lowest address of a loaded segment in the objfile,
999 and assume that <addr> is where that got loaded.
1001 We no longer warn if the lowest section is not a text segment (as
1002 happens for the PA64 port. */
1003 if (addrs
&& addrs
->other
[0].name
)
1004 addr_info_make_relative (addrs
, objfile
->obfd
);
1006 /* Initialize symbol reading routines for this objfile, allow complaints to
1007 appear for this new file, and record how verbose to be, then do the
1008 initial symbol reading for this file. */
1010 (*objfile
->sf
->sym_init
) (objfile
);
1011 clear_complaints (&symfile_complaints
, 1, add_flags
& SYMFILE_VERBOSE
);
1014 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
1017 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_offsets
);
1019 /* Just copy in the offset table directly as given to us. */
1020 objfile
->num_sections
= num_offsets
;
1021 objfile
->section_offsets
1022 = ((struct section_offsets
*)
1023 obstack_alloc (&objfile
->objfile_obstack
, size
));
1024 memcpy (objfile
->section_offsets
, offsets
, size
);
1026 init_objfile_sect_indices (objfile
);
1029 (*objfile
->sf
->sym_read
) (objfile
, add_flags
);
1031 /* Discard cleanups as symbol reading was successful. */
1033 discard_cleanups (old_chain
);
1037 /* Perform required actions after either reading in the initial
1038 symbols for a new objfile, or mapping in the symbols from a reusable
1039 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
1042 new_symfile_objfile (struct objfile
*objfile
, int add_flags
)
1044 /* If this is the main symbol file we have to clean up all users of the
1045 old main symbol file. Otherwise it is sufficient to fixup all the
1046 breakpoints that may have been redefined by this symbol file. */
1047 if (add_flags
& SYMFILE_MAINLINE
)
1049 /* OK, make it the "real" symbol file. */
1050 symfile_objfile
= objfile
;
1052 clear_symtab_users (add_flags
);
1054 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
1056 breakpoint_re_set ();
1059 /* We're done reading the symbol file; finish off complaints. */
1060 clear_complaints (&symfile_complaints
, 0, add_flags
& SYMFILE_VERBOSE
);
1063 /* Process a symbol file, as either the main file or as a dynamically
1066 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1067 This BFD will be closed on error, and is always consumed by this function.
1069 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1070 extra, such as dynamically loaded code, and what to do with breakpoins.
1072 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
1073 syms_from_objfile, above.
1074 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1076 Upon success, returns a pointer to the objfile that was added.
1077 Upon failure, jumps back to command level (never returns). */
1079 static struct objfile
*
1080 symbol_file_add_with_addrs_or_offsets (bfd
*abfd
,
1082 struct section_addr_info
*addrs
,
1083 struct section_offsets
*offsets
,
1087 struct objfile
*objfile
;
1088 struct cleanup
*my_cleanups
;
1089 const char *name
= bfd_get_filename (abfd
);
1090 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1092 if (readnow_symbol_files
)
1093 flags
|= OBJF_READNOW
;
1095 my_cleanups
= make_cleanup_bfd_close (abfd
);
1097 /* Give user a chance to burp if we'd be
1098 interactively wiping out any existing symbols. */
1100 if ((have_full_symbols () || have_partial_symbols ())
1101 && (add_flags
& SYMFILE_MAINLINE
)
1103 && !query (_("Load new symbol table from \"%s\"? "), name
))
1104 error (_("Not confirmed."));
1106 objfile
= allocate_objfile (abfd
, flags
);
1107 discard_cleanups (my_cleanups
);
1109 /* We either created a new mapped symbol table, mapped an existing
1110 symbol table file which has not had initial symbol reading
1111 performed, or need to read an unmapped symbol table. */
1112 if (from_tty
|| info_verbose
)
1114 if (deprecated_pre_add_symbol_hook
)
1115 deprecated_pre_add_symbol_hook (name
);
1118 printf_unfiltered (_("Reading symbols from %s..."), name
);
1120 gdb_flush (gdb_stdout
);
1123 syms_from_objfile (objfile
, addrs
, offsets
, num_offsets
,
1126 /* We now have at least a partial symbol table. Check to see if the
1127 user requested that all symbols be read on initial access via either
1128 the gdb startup command line or on a per symbol file basis. Expand
1129 all partial symbol tables for this objfile if so. */
1131 if ((flags
& OBJF_READNOW
))
1133 if (from_tty
|| info_verbose
)
1135 printf_unfiltered (_("expanding to full symbols..."));
1137 gdb_flush (gdb_stdout
);
1141 objfile
->sf
->qf
->expand_all_symtabs (objfile
);
1144 if ((from_tty
|| info_verbose
)
1145 && !objfile_has_symbols (objfile
))
1148 printf_unfiltered (_("(no debugging symbols found)..."));
1152 if (from_tty
|| info_verbose
)
1154 if (deprecated_post_add_symbol_hook
)
1155 deprecated_post_add_symbol_hook ();
1157 printf_unfiltered (_("done.\n"));
1160 /* We print some messages regardless of whether 'from_tty ||
1161 info_verbose' is true, so make sure they go out at the right
1163 gdb_flush (gdb_stdout
);
1165 do_cleanups (my_cleanups
);
1167 if (objfile
->sf
== NULL
)
1169 observer_notify_new_objfile (objfile
);
1170 return objfile
; /* No symbols. */
1173 new_symfile_objfile (objfile
, add_flags
);
1175 observer_notify_new_objfile (objfile
);
1177 bfd_cache_close_all ();
1181 /* Add BFD as a separate debug file for OBJFILE. */
1184 symbol_file_add_separate (bfd
*bfd
, int symfile_flags
, struct objfile
*objfile
)
1186 struct objfile
*new_objfile
;
1187 struct section_addr_info
*sap
;
1188 struct cleanup
*my_cleanup
;
1190 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1191 because sections of BFD may not match sections of OBJFILE and because
1192 vma may have been modified by tools such as prelink. */
1193 sap
= build_section_addr_info_from_objfile (objfile
);
1194 my_cleanup
= make_cleanup_free_section_addr_info (sap
);
1196 new_objfile
= symbol_file_add_with_addrs_or_offsets
1197 (bfd
, symfile_flags
,
1199 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1200 | OBJF_USERLOADED
));
1202 do_cleanups (my_cleanup
);
1204 add_separate_debug_objfile (new_objfile
, objfile
);
1207 /* Process the symbol file ABFD, as either the main file or as a
1208 dynamically loaded file.
1210 See symbol_file_add_with_addrs_or_offsets's comments for
1213 symbol_file_add_from_bfd (bfd
*abfd
, int add_flags
,
1214 struct section_addr_info
*addrs
,
1217 return symbol_file_add_with_addrs_or_offsets (abfd
, add_flags
, addrs
, 0, 0,
1222 /* Process a symbol file, as either the main file or as a dynamically
1223 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
1226 symbol_file_add (char *name
, int add_flags
, struct section_addr_info
*addrs
,
1229 return symbol_file_add_from_bfd (symfile_bfd_open (name
), add_flags
, addrs
,
1234 /* Call symbol_file_add() with default values and update whatever is
1235 affected by the loading of a new main().
1236 Used when the file is supplied in the gdb command line
1237 and by some targets with special loading requirements.
1238 The auxiliary function, symbol_file_add_main_1(), has the flags
1239 argument for the switches that can only be specified in the symbol_file
1243 symbol_file_add_main (char *args
, int from_tty
)
1245 symbol_file_add_main_1 (args
, from_tty
, 0);
1249 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
1251 const int add_flags
= SYMFILE_MAINLINE
| (from_tty
? SYMFILE_VERBOSE
: 0);
1252 symbol_file_add (args
, add_flags
, NULL
, flags
);
1254 /* Getting new symbols may change our opinion about
1255 what is frameless. */
1256 reinit_frame_cache ();
1258 set_initial_language ();
1262 symbol_file_clear (int from_tty
)
1264 if ((have_full_symbols () || have_partial_symbols ())
1267 ? !query (_("Discard symbol table from `%s'? "),
1268 symfile_objfile
->name
)
1269 : !query (_("Discard symbol table? "))))
1270 error (_("Not confirmed."));
1272 /* solib descriptors may have handles to objfiles. Wipe them before their
1273 objfiles get stale by free_all_objfiles. */
1274 no_shared_libraries (NULL
, from_tty
);
1276 free_all_objfiles ();
1278 gdb_assert (symfile_objfile
== NULL
);
1280 printf_unfiltered (_("No symbol file now.\n"));
1284 get_debug_link_info (struct objfile
*objfile
, unsigned long *crc32_out
)
1287 bfd_size_type debuglink_size
;
1288 unsigned long crc32
;
1292 sect
= bfd_get_section_by_name (objfile
->obfd
, ".gnu_debuglink");
1297 debuglink_size
= bfd_section_size (objfile
->obfd
, sect
);
1299 contents
= xmalloc (debuglink_size
);
1300 bfd_get_section_contents (objfile
->obfd
, sect
, contents
,
1301 (file_ptr
)0, (bfd_size_type
)debuglink_size
);
1303 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1304 crc_offset
= strlen (contents
) + 1;
1305 crc_offset
= (crc_offset
+ 3) & ~3;
1307 crc32
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) (contents
+ crc_offset
));
1314 separate_debug_file_exists (const char *name
, unsigned long crc
,
1315 struct objfile
*parent_objfile
)
1317 unsigned long file_crc
= 0;
1319 gdb_byte buffer
[8*1024];
1321 struct stat parent_stat
, abfd_stat
;
1323 /* Find a separate debug info file as if symbols would be present in
1324 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1325 section can contain just the basename of PARENT_OBJFILE without any
1326 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1327 the separate debug infos with the same basename can exist. */
1329 if (strcmp (name
, parent_objfile
->name
) == 0)
1332 abfd
= bfd_open_maybe_remote (name
);
1337 /* Verify symlinks were not the cause of strcmp name difference above.
1339 Some operating systems, e.g. Windows, do not provide a meaningful
1340 st_ino; they always set it to zero. (Windows does provide a
1341 meaningful st_dev.) Do not indicate a duplicate library in that
1342 case. While there is no guarantee that a system that provides
1343 meaningful inode numbers will never set st_ino to zero, this is
1344 merely an optimization, so we do not need to worry about false
1347 if (bfd_stat (abfd
, &abfd_stat
) == 0
1348 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0
1349 && abfd_stat
.st_dev
== parent_stat
.st_dev
1350 && abfd_stat
.st_ino
== parent_stat
.st_ino
1351 && abfd_stat
.st_ino
!= 0)
1357 while ((count
= bfd_bread (buffer
, sizeof (buffer
), abfd
)) > 0)
1358 file_crc
= gnu_debuglink_crc32 (file_crc
, buffer
, count
);
1362 if (crc
!= file_crc
)
1364 warning (_("the debug information found in \"%s\""
1365 " does not match \"%s\" (CRC mismatch).\n"),
1366 name
, parent_objfile
->name
);
1373 char *debug_file_directory
= NULL
;
1375 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1376 struct cmd_list_element
*c
, const char *value
)
1378 fprintf_filtered (file
,
1379 _("The directory where separate debug "
1380 "symbols are searched for is \"%s\".\n"),
1384 #if ! defined (DEBUG_SUBDIRECTORY)
1385 #define DEBUG_SUBDIRECTORY ".debug"
1389 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1391 char *basename
, *debugdir
;
1393 char *debugfile
= NULL
;
1394 char *canon_name
= NULL
;
1395 unsigned long crc32
;
1398 basename
= get_debug_link_info (objfile
, &crc32
);
1400 if (basename
== NULL
)
1401 /* There's no separate debug info, hence there's no way we could
1402 load it => no warning. */
1403 goto cleanup_return_debugfile
;
1405 dir
= xstrdup (objfile
->name
);
1407 /* Strip off the final filename part, leaving the directory name,
1408 followed by a slash. The directory can be relative or absolute. */
1409 for (i
= strlen(dir
) - 1; i
>= 0; i
--)
1411 if (IS_DIR_SEPARATOR (dir
[i
]))
1414 /* If I is -1 then no directory is present there and DIR will be "". */
1417 /* Set I to max (strlen (canon_name), strlen (dir)). */
1418 canon_name
= lrealpath (dir
);
1420 if (canon_name
&& strlen (canon_name
) > i
)
1421 i
= strlen (canon_name
);
1423 debugfile
= xmalloc (strlen (debug_file_directory
) + 1
1425 + strlen (DEBUG_SUBDIRECTORY
)
1430 /* First try in the same directory as the original file. */
1431 strcpy (debugfile
, dir
);
1432 strcat (debugfile
, basename
);
1434 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1435 goto cleanup_return_debugfile
;
1437 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1438 strcpy (debugfile
, dir
);
1439 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1440 strcat (debugfile
, "/");
1441 strcat (debugfile
, basename
);
1443 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1444 goto cleanup_return_debugfile
;
1446 /* Then try in the global debugfile directories.
1448 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1449 cause "/..." lookups. */
1451 debugdir
= debug_file_directory
;
1456 while (*debugdir
== DIRNAME_SEPARATOR
)
1459 debugdir_end
= strchr (debugdir
, DIRNAME_SEPARATOR
);
1460 if (debugdir_end
== NULL
)
1461 debugdir_end
= &debugdir
[strlen (debugdir
)];
1463 memcpy (debugfile
, debugdir
, debugdir_end
- debugdir
);
1464 debugfile
[debugdir_end
- debugdir
] = 0;
1465 strcat (debugfile
, "/");
1466 strcat (debugfile
, dir
);
1467 strcat (debugfile
, basename
);
1469 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1470 goto cleanup_return_debugfile
;
1472 /* If the file is in the sysroot, try using its base path in the
1473 global debugfile directory. */
1475 && strncmp (canon_name
, gdb_sysroot
, strlen (gdb_sysroot
)) == 0
1476 && IS_DIR_SEPARATOR (canon_name
[strlen (gdb_sysroot
)]))
1478 memcpy (debugfile
, debugdir
, debugdir_end
- debugdir
);
1479 debugfile
[debugdir_end
- debugdir
] = 0;
1480 strcat (debugfile
, canon_name
+ strlen (gdb_sysroot
));
1481 strcat (debugfile
, "/");
1482 strcat (debugfile
, basename
);
1484 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1485 goto cleanup_return_debugfile
;
1488 debugdir
= debugdir_end
;
1490 while (*debugdir
!= 0);
1495 cleanup_return_debugfile
:
1503 /* This is the symbol-file command. Read the file, analyze its
1504 symbols, and add a struct symtab to a symtab list. The syntax of
1505 the command is rather bizarre:
1507 1. The function buildargv implements various quoting conventions
1508 which are undocumented and have little or nothing in common with
1509 the way things are quoted (or not quoted) elsewhere in GDB.
1511 2. Options are used, which are not generally used in GDB (perhaps
1512 "set mapped on", "set readnow on" would be better)
1514 3. The order of options matters, which is contrary to GNU
1515 conventions (because it is confusing and inconvenient). */
1518 symbol_file_command (char *args
, int from_tty
)
1524 symbol_file_clear (from_tty
);
1528 char **argv
= gdb_buildargv (args
);
1529 int flags
= OBJF_USERLOADED
;
1530 struct cleanup
*cleanups
;
1533 cleanups
= make_cleanup_freeargv (argv
);
1534 while (*argv
!= NULL
)
1536 if (strcmp (*argv
, "-readnow") == 0)
1537 flags
|= OBJF_READNOW
;
1538 else if (**argv
== '-')
1539 error (_("unknown option `%s'"), *argv
);
1542 symbol_file_add_main_1 (*argv
, from_tty
, flags
);
1550 error (_("no symbol file name was specified"));
1552 do_cleanups (cleanups
);
1556 /* Set the initial language.
1558 FIXME: A better solution would be to record the language in the
1559 psymtab when reading partial symbols, and then use it (if known) to
1560 set the language. This would be a win for formats that encode the
1561 language in an easily discoverable place, such as DWARF. For
1562 stabs, we can jump through hoops looking for specially named
1563 symbols or try to intuit the language from the specific type of
1564 stabs we find, but we can't do that until later when we read in
1568 set_initial_language (void)
1570 enum language lang
= language_unknown
;
1572 if (language_of_main
!= language_unknown
)
1573 lang
= language_of_main
;
1576 const char *filename
;
1578 filename
= find_main_filename ();
1579 if (filename
!= NULL
)
1580 lang
= deduce_language_from_filename (filename
);
1583 if (lang
== language_unknown
)
1585 /* Make C the default language */
1589 set_language (lang
);
1590 expected_language
= current_language
; /* Don't warn the user. */
1593 /* If NAME is a remote name open the file using remote protocol, otherwise
1594 open it normally. */
1597 bfd_open_maybe_remote (const char *name
)
1599 if (remote_filename_p (name
))
1600 return remote_bfd_open (name
, gnutarget
);
1602 return bfd_openr (name
, gnutarget
);
1606 /* Open the file specified by NAME and hand it off to BFD for
1607 preliminary analysis. Return a newly initialized bfd *, which
1608 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1609 absolute). In case of trouble, error() is called. */
1612 symfile_bfd_open (char *name
)
1616 char *absolute_name
;
1618 if (remote_filename_p (name
))
1620 name
= xstrdup (name
);
1621 sym_bfd
= remote_bfd_open (name
, gnutarget
);
1624 make_cleanup (xfree
, name
);
1625 error (_("`%s': can't open to read symbols: %s."), name
,
1626 bfd_errmsg (bfd_get_error ()));
1629 if (!bfd_check_format (sym_bfd
, bfd_object
))
1631 bfd_close (sym_bfd
);
1632 make_cleanup (xfree
, name
);
1633 error (_("`%s': can't read symbols: %s."), name
,
1634 bfd_errmsg (bfd_get_error ()));
1640 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy. */
1642 /* Look down path for it, allocate 2nd new malloc'd copy. */
1643 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, name
,
1644 O_RDONLY
| O_BINARY
, &absolute_name
);
1645 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1648 char *exename
= alloca (strlen (name
) + 5);
1650 strcat (strcpy (exename
, name
), ".exe");
1651 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, exename
,
1652 O_RDONLY
| O_BINARY
, &absolute_name
);
1657 make_cleanup (xfree
, name
);
1658 perror_with_name (name
);
1661 /* Free 1st new malloc'd copy, but keep the 2nd malloc'd copy in
1662 bfd. It'll be freed in free_objfile(). */
1664 name
= absolute_name
;
1666 sym_bfd
= bfd_fopen (name
, gnutarget
, FOPEN_RB
, desc
);
1670 make_cleanup (xfree
, name
);
1671 error (_("`%s': can't open to read symbols: %s."), name
,
1672 bfd_errmsg (bfd_get_error ()));
1674 bfd_set_cacheable (sym_bfd
, 1);
1676 if (!bfd_check_format (sym_bfd
, bfd_object
))
1678 /* FIXME: should be checking for errors from bfd_close (for one
1679 thing, on error it does not free all the storage associated
1681 bfd_close (sym_bfd
); /* This also closes desc. */
1682 make_cleanup (xfree
, name
);
1683 error (_("`%s': can't read symbols: %s."), name
,
1684 bfd_errmsg (bfd_get_error ()));
1687 /* bfd_usrdata exists for applications and libbfd must not touch it. */
1688 gdb_assert (bfd_usrdata (sym_bfd
) == NULL
);
1693 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1694 the section was not found. */
1697 get_section_index (struct objfile
*objfile
, char *section_name
)
1699 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1707 /* Link SF into the global symtab_fns list. Called on startup by the
1708 _initialize routine in each object file format reader, to register
1709 information about each format the the reader is prepared to
1713 add_symtab_fns (const struct sym_fns
*sf
)
1715 VEC_safe_push (sym_fns_ptr
, symtab_fns
, sf
);
1718 /* Initialize OBJFILE to read symbols from its associated BFD. It
1719 either returns or calls error(). The result is an initialized
1720 struct sym_fns in the objfile structure, that contains cached
1721 information about the symbol file. */
1723 static const struct sym_fns
*
1724 find_sym_fns (bfd
*abfd
)
1726 const struct sym_fns
*sf
;
1727 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1730 if (our_flavour
== bfd_target_srec_flavour
1731 || our_flavour
== bfd_target_ihex_flavour
1732 || our_flavour
== bfd_target_tekhex_flavour
)
1733 return NULL
; /* No symbols. */
1735 for (i
= 0; VEC_iterate (sym_fns_ptr
, symtab_fns
, i
, sf
); ++i
)
1736 if (our_flavour
== sf
->sym_flavour
)
1739 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1740 bfd_get_target (abfd
));
1744 /* This function runs the load command of our current target. */
1747 load_command (char *arg
, int from_tty
)
1751 /* The user might be reloading because the binary has changed. Take
1752 this opportunity to check. */
1753 reopen_exec_file ();
1761 parg
= arg
= get_exec_file (1);
1763 /* Count how many \ " ' tab space there are in the name. */
1764 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1772 /* We need to quote this string so buildargv can pull it apart. */
1773 char *temp
= xmalloc (strlen (arg
) + count
+ 1 );
1777 make_cleanup (xfree
, temp
);
1780 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1782 strncpy (ptemp
, prev
, parg
- prev
);
1783 ptemp
+= parg
- prev
;
1787 strcpy (ptemp
, prev
);
1793 target_load (arg
, from_tty
);
1795 /* After re-loading the executable, we don't really know which
1796 overlays are mapped any more. */
1797 overlay_cache_invalid
= 1;
1800 /* This version of "load" should be usable for any target. Currently
1801 it is just used for remote targets, not inftarg.c or core files,
1802 on the theory that only in that case is it useful.
1804 Avoiding xmodem and the like seems like a win (a) because we don't have
1805 to worry about finding it, and (b) On VMS, fork() is very slow and so
1806 we don't want to run a subprocess. On the other hand, I'm not sure how
1807 performance compares. */
1809 static int validate_download
= 0;
1811 /* Callback service function for generic_load (bfd_map_over_sections). */
1814 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1816 bfd_size_type
*sum
= data
;
1818 *sum
+= bfd_get_section_size (asec
);
1821 /* Opaque data for load_section_callback. */
1822 struct load_section_data
{
1823 unsigned long load_offset
;
1824 struct load_progress_data
*progress_data
;
1825 VEC(memory_write_request_s
) *requests
;
1828 /* Opaque data for load_progress. */
1829 struct load_progress_data
{
1830 /* Cumulative data. */
1831 unsigned long write_count
;
1832 unsigned long data_count
;
1833 bfd_size_type total_size
;
1836 /* Opaque data for load_progress for a single section. */
1837 struct load_progress_section_data
{
1838 struct load_progress_data
*cumulative
;
1840 /* Per-section data. */
1841 const char *section_name
;
1842 ULONGEST section_sent
;
1843 ULONGEST section_size
;
1848 /* Target write callback routine for progress reporting. */
1851 load_progress (ULONGEST bytes
, void *untyped_arg
)
1853 struct load_progress_section_data
*args
= untyped_arg
;
1854 struct load_progress_data
*totals
;
1857 /* Writing padding data. No easy way to get at the cumulative
1858 stats, so just ignore this. */
1861 totals
= args
->cumulative
;
1863 if (bytes
== 0 && args
->section_sent
== 0)
1865 /* The write is just starting. Let the user know we've started
1867 ui_out_message (uiout
, 0, "Loading section %s, size %s lma %s\n",
1868 args
->section_name
, hex_string (args
->section_size
),
1869 paddress (target_gdbarch
, args
->lma
));
1873 if (validate_download
)
1875 /* Broken memories and broken monitors manifest themselves here
1876 when bring new computers to life. This doubles already slow
1878 /* NOTE: cagney/1999-10-18: A more efficient implementation
1879 might add a verify_memory() method to the target vector and
1880 then use that. remote.c could implement that method using
1881 the ``qCRC'' packet. */
1882 gdb_byte
*check
= xmalloc (bytes
);
1883 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
1885 if (target_read_memory (args
->lma
, check
, bytes
) != 0)
1886 error (_("Download verify read failed at %s"),
1887 paddress (target_gdbarch
, args
->lma
));
1888 if (memcmp (args
->buffer
, check
, bytes
) != 0)
1889 error (_("Download verify compare failed at %s"),
1890 paddress (target_gdbarch
, args
->lma
));
1891 do_cleanups (verify_cleanups
);
1893 totals
->data_count
+= bytes
;
1895 args
->buffer
+= bytes
;
1896 totals
->write_count
+= 1;
1897 args
->section_sent
+= bytes
;
1899 || (deprecated_ui_load_progress_hook
!= NULL
1900 && deprecated_ui_load_progress_hook (args
->section_name
,
1901 args
->section_sent
)))
1902 error (_("Canceled the download"));
1904 if (deprecated_show_load_progress
!= NULL
)
1905 deprecated_show_load_progress (args
->section_name
,
1909 totals
->total_size
);
1912 /* Callback service function for generic_load (bfd_map_over_sections). */
1915 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1917 struct memory_write_request
*new_request
;
1918 struct load_section_data
*args
= data
;
1919 struct load_progress_section_data
*section_data
;
1920 bfd_size_type size
= bfd_get_section_size (asec
);
1922 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1924 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
1930 new_request
= VEC_safe_push (memory_write_request_s
,
1931 args
->requests
, NULL
);
1932 memset (new_request
, 0, sizeof (struct memory_write_request
));
1933 section_data
= xcalloc (1, sizeof (struct load_progress_section_data
));
1934 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1935 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size
1937 new_request
->data
= xmalloc (size
);
1938 new_request
->baton
= section_data
;
1940 buffer
= new_request
->data
;
1942 section_data
->cumulative
= args
->progress_data
;
1943 section_data
->section_name
= sect_name
;
1944 section_data
->section_size
= size
;
1945 section_data
->lma
= new_request
->begin
;
1946 section_data
->buffer
= buffer
;
1948 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1951 /* Clean up an entire memory request vector, including load
1952 data and progress records. */
1955 clear_memory_write_data (void *arg
)
1957 VEC(memory_write_request_s
) **vec_p
= arg
;
1958 VEC(memory_write_request_s
) *vec
= *vec_p
;
1960 struct memory_write_request
*mr
;
1962 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
1967 VEC_free (memory_write_request_s
, vec
);
1971 generic_load (char *args
, int from_tty
)
1974 struct timeval start_time
, end_time
;
1976 struct cleanup
*old_cleanups
= make_cleanup (null_cleanup
, 0);
1977 struct load_section_data cbdata
;
1978 struct load_progress_data total_progress
;
1983 memset (&cbdata
, 0, sizeof (cbdata
));
1984 memset (&total_progress
, 0, sizeof (total_progress
));
1985 cbdata
.progress_data
= &total_progress
;
1987 make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
1990 error_no_arg (_("file to load"));
1992 argv
= gdb_buildargv (args
);
1993 make_cleanup_freeargv (argv
);
1995 filename
= tilde_expand (argv
[0]);
1996 make_cleanup (xfree
, filename
);
1998 if (argv
[1] != NULL
)
2002 cbdata
.load_offset
= strtoul (argv
[1], &endptr
, 0);
2004 /* If the last word was not a valid number then
2005 treat it as a file name with spaces in. */
2006 if (argv
[1] == endptr
)
2007 error (_("Invalid download offset:%s."), argv
[1]);
2009 if (argv
[2] != NULL
)
2010 error (_("Too many parameters."));
2013 /* Open the file for loading. */
2014 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
2015 if (loadfile_bfd
== NULL
)
2017 perror_with_name (filename
);
2021 /* FIXME: should be checking for errors from bfd_close (for one thing,
2022 on error it does not free all the storage associated with the
2024 make_cleanup_bfd_close (loadfile_bfd
);
2026 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
2028 error (_("\"%s\" is not an object file: %s"), filename
,
2029 bfd_errmsg (bfd_get_error ()));
2032 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
2033 (void *) &total_progress
.total_size
);
2035 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
2037 gettimeofday (&start_time
, NULL
);
2039 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2040 load_progress
) != 0)
2041 error (_("Load failed"));
2043 gettimeofday (&end_time
, NULL
);
2045 entry
= bfd_get_start_address (loadfile_bfd
);
2046 ui_out_text (uiout
, "Start address ");
2047 ui_out_field_fmt (uiout
, "address", "%s", paddress (target_gdbarch
, entry
));
2048 ui_out_text (uiout
, ", load size ");
2049 ui_out_field_fmt (uiout
, "load-size", "%lu", total_progress
.data_count
);
2050 ui_out_text (uiout
, "\n");
2051 /* We were doing this in remote-mips.c, I suspect it is right
2052 for other targets too. */
2053 regcache_write_pc (get_current_regcache (), entry
);
2055 /* Reset breakpoints, now that we have changed the load image. For
2056 instance, breakpoints may have been set (or reset, by
2057 post_create_inferior) while connected to the target but before we
2058 loaded the program. In that case, the prologue analyzer could
2059 have read instructions from the target to find the right
2060 breakpoint locations. Loading has changed the contents of that
2063 breakpoint_re_set ();
2065 /* FIXME: are we supposed to call symbol_file_add or not? According
2066 to a comment from remote-mips.c (where a call to symbol_file_add
2067 was commented out), making the call confuses GDB if more than one
2068 file is loaded in. Some targets do (e.g., remote-vx.c) but
2069 others don't (or didn't - perhaps they have all been deleted). */
2071 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2072 total_progress
.write_count
,
2073 &start_time
, &end_time
);
2075 do_cleanups (old_cleanups
);
2078 /* Report how fast the transfer went. */
2080 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
2081 replaced by print_transfer_performance (with a very different
2082 function signature). */
2085 report_transfer_performance (unsigned long data_count
, time_t start_time
,
2088 struct timeval start
, end
;
2090 start
.tv_sec
= start_time
;
2092 end
.tv_sec
= end_time
;
2095 print_transfer_performance (gdb_stdout
, data_count
, 0, &start
, &end
);
2099 print_transfer_performance (struct ui_file
*stream
,
2100 unsigned long data_count
,
2101 unsigned long write_count
,
2102 const struct timeval
*start_time
,
2103 const struct timeval
*end_time
)
2105 ULONGEST time_count
;
2107 /* Compute the elapsed time in milliseconds, as a tradeoff between
2108 accuracy and overflow. */
2109 time_count
= (end_time
->tv_sec
- start_time
->tv_sec
) * 1000;
2110 time_count
+= (end_time
->tv_usec
- start_time
->tv_usec
) / 1000;
2112 ui_out_text (uiout
, "Transfer rate: ");
2115 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / time_count
;
2117 if (ui_out_is_mi_like_p (uiout
))
2119 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
* 8);
2120 ui_out_text (uiout
, " bits/sec");
2122 else if (rate
< 1024)
2124 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
);
2125 ui_out_text (uiout
, " bytes/sec");
2129 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
/ 1024);
2130 ui_out_text (uiout
, " KB/sec");
2135 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
2136 ui_out_text (uiout
, " bits in <1 sec");
2138 if (write_count
> 0)
2140 ui_out_text (uiout
, ", ");
2141 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
2142 ui_out_text (uiout
, " bytes/write");
2144 ui_out_text (uiout
, ".\n");
2147 /* This function allows the addition of incrementally linked object files.
2148 It does not modify any state in the target, only in the debugger. */
2149 /* Note: ezannoni 2000-04-13 This function/command used to have a
2150 special case syntax for the rombug target (Rombug is the boot
2151 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2152 rombug case, the user doesn't need to supply a text address,
2153 instead a call to target_link() (in target.c) would supply the
2154 value to use. We are now discontinuing this type of ad hoc syntax. */
2157 add_symbol_file_command (char *args
, int from_tty
)
2159 struct gdbarch
*gdbarch
= get_current_arch ();
2160 char *filename
= NULL
;
2161 int flags
= OBJF_USERLOADED
;
2163 int section_index
= 0;
2167 int expecting_sec_name
= 0;
2168 int expecting_sec_addr
= 0;
2177 struct section_addr_info
*section_addrs
;
2178 struct sect_opt
*sect_opts
= NULL
;
2179 size_t num_sect_opts
= 0;
2180 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2183 sect_opts
= (struct sect_opt
*) xmalloc (num_sect_opts
2184 * sizeof (struct sect_opt
));
2189 error (_("add-symbol-file takes a file name and an address"));
2191 argv
= gdb_buildargv (args
);
2192 make_cleanup_freeargv (argv
);
2194 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2196 /* Process the argument. */
2199 /* The first argument is the file name. */
2200 filename
= tilde_expand (arg
);
2201 make_cleanup (xfree
, filename
);
2206 /* The second argument is always the text address at which
2207 to load the program. */
2208 sect_opts
[section_index
].name
= ".text";
2209 sect_opts
[section_index
].value
= arg
;
2210 if (++section_index
>= num_sect_opts
)
2213 sect_opts
= ((struct sect_opt
*)
2214 xrealloc (sect_opts
,
2216 * sizeof (struct sect_opt
)));
2221 /* It's an option (starting with '-') or it's an argument
2226 if (strcmp (arg
, "-readnow") == 0)
2227 flags
|= OBJF_READNOW
;
2228 else if (strcmp (arg
, "-s") == 0)
2230 expecting_sec_name
= 1;
2231 expecting_sec_addr
= 1;
2236 if (expecting_sec_name
)
2238 sect_opts
[section_index
].name
= arg
;
2239 expecting_sec_name
= 0;
2242 if (expecting_sec_addr
)
2244 sect_opts
[section_index
].value
= arg
;
2245 expecting_sec_addr
= 0;
2246 if (++section_index
>= num_sect_opts
)
2249 sect_opts
= ((struct sect_opt
*)
2250 xrealloc (sect_opts
,
2252 * sizeof (struct sect_opt
)));
2256 error (_("USAGE: add-symbol-file <filename> <textaddress>"
2257 " [-mapped] [-readnow] [-s <secname> <addr>]*"));
2262 /* This command takes at least two arguments. The first one is a
2263 filename, and the second is the address where this file has been
2264 loaded. Abort now if this address hasn't been provided by the
2266 if (section_index
< 1)
2267 error (_("The address where %s has been loaded is missing"), filename
);
2269 /* Print the prompt for the query below. And save the arguments into
2270 a sect_addr_info structure to be passed around to other
2271 functions. We have to split this up into separate print
2272 statements because hex_string returns a local static
2275 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename
);
2276 section_addrs
= alloc_section_addr_info (section_index
);
2277 make_cleanup (xfree
, section_addrs
);
2278 for (i
= 0; i
< section_index
; i
++)
2281 char *val
= sect_opts
[i
].value
;
2282 char *sec
= sect_opts
[i
].name
;
2284 addr
= parse_and_eval_address (val
);
2286 /* Here we store the section offsets in the order they were
2287 entered on the command line. */
2288 section_addrs
->other
[sec_num
].name
= sec
;
2289 section_addrs
->other
[sec_num
].addr
= addr
;
2290 printf_unfiltered ("\t%s_addr = %s\n", sec
,
2291 paddress (gdbarch
, addr
));
2294 /* The object's sections are initialized when a
2295 call is made to build_objfile_section_table (objfile).
2296 This happens in reread_symbols.
2297 At this point, we don't know what file type this is,
2298 so we can't determine what section names are valid. */
2301 if (from_tty
&& (!query ("%s", "")))
2302 error (_("Not confirmed."));
2304 symbol_file_add (filename
, from_tty
? SYMFILE_VERBOSE
: 0,
2305 section_addrs
, flags
);
2307 /* Getting new symbols may change our opinion about what is
2309 reinit_frame_cache ();
2310 do_cleanups (my_cleanups
);
2314 /* Re-read symbols if a symbol-file has changed. */
2316 reread_symbols (void)
2318 struct objfile
*objfile
;
2321 struct stat new_statbuf
;
2324 /* With the addition of shared libraries, this should be modified,
2325 the load time should be saved in the partial symbol tables, since
2326 different tables may come from different source files. FIXME.
2327 This routine should then walk down each partial symbol table
2328 and see if the symbol table that it originates from has been changed */
2330 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2332 /* solib-sunos.c creates one objfile with obfd. */
2333 if (objfile
->obfd
== NULL
)
2336 /* Separate debug objfiles are handled in the main objfile. */
2337 if (objfile
->separate_debug_objfile_backlink
)
2340 /* If this object is from an archive (what you usually create with
2341 `ar', often called a `static library' on most systems, though
2342 a `shared library' on AIX is also an archive), then you should
2343 stat on the archive name, not member name. */
2344 if (objfile
->obfd
->my_archive
)
2345 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2347 res
= stat (objfile
->name
, &new_statbuf
);
2350 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2351 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2355 new_modtime
= new_statbuf
.st_mtime
;
2356 if (new_modtime
!= objfile
->mtime
)
2358 struct cleanup
*old_cleanups
;
2359 struct section_offsets
*offsets
;
2361 char *obfd_filename
;
2363 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2366 /* There are various functions like symbol_file_add,
2367 symfile_bfd_open, syms_from_objfile, etc., which might
2368 appear to do what we want. But they have various other
2369 effects which we *don't* want. So we just do stuff
2370 ourselves. We don't worry about mapped files (for one thing,
2371 any mapped file will be out of date). */
2373 /* If we get an error, blow away this objfile (not sure if
2374 that is the correct response for things like shared
2376 old_cleanups
= make_cleanup_free_objfile (objfile
);
2377 /* We need to do this whenever any symbols go away. */
2378 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2380 if (exec_bfd
!= NULL
&& strcmp (bfd_get_filename (objfile
->obfd
),
2381 bfd_get_filename (exec_bfd
)) == 0)
2383 /* Reload EXEC_BFD without asking anything. */
2385 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2388 /* Clean up any state BFD has sitting around. We don't need
2389 to close the descriptor but BFD lacks a way of closing the
2390 BFD without closing the descriptor. */
2391 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2392 if (!bfd_close (objfile
->obfd
))
2393 error (_("Can't close BFD for %s: %s"), objfile
->name
,
2394 bfd_errmsg (bfd_get_error ()));
2395 objfile
->obfd
= bfd_open_maybe_remote (obfd_filename
);
2396 if (objfile
->obfd
== NULL
)
2397 error (_("Can't open %s to read symbols."), objfile
->name
);
2399 objfile
->obfd
= gdb_bfd_ref (objfile
->obfd
);
2400 /* bfd_openr sets cacheable to true, which is what we want. */
2401 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2402 error (_("Can't read symbols from %s: %s."), objfile
->name
,
2403 bfd_errmsg (bfd_get_error ()));
2405 /* Save the offsets, we will nuke them with the rest of the
2407 num_offsets
= objfile
->num_sections
;
2408 offsets
= ((struct section_offsets
*)
2409 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2410 memcpy (offsets
, objfile
->section_offsets
,
2411 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2413 /* Remove any references to this objfile in the global
2415 preserve_values (objfile
);
2417 /* Nuke all the state that we will re-read. Much of the following
2418 code which sets things to NULL really is necessary to tell
2419 other parts of GDB that there is nothing currently there.
2421 Try to keep the freeing order compatible with free_objfile. */
2423 if (objfile
->sf
!= NULL
)
2425 (*objfile
->sf
->sym_finish
) (objfile
);
2428 clear_objfile_data (objfile
);
2430 /* Free the separate debug objfiles. It will be
2431 automatically recreated by sym_read. */
2432 free_objfile_separate_debug (objfile
);
2434 /* FIXME: Do we have to free a whole linked list, or is this
2436 if (objfile
->global_psymbols
.list
)
2437 xfree (objfile
->global_psymbols
.list
);
2438 memset (&objfile
->global_psymbols
, 0,
2439 sizeof (objfile
->global_psymbols
));
2440 if (objfile
->static_psymbols
.list
)
2441 xfree (objfile
->static_psymbols
.list
);
2442 memset (&objfile
->static_psymbols
, 0,
2443 sizeof (objfile
->static_psymbols
));
2445 /* Free the obstacks for non-reusable objfiles */
2446 psymbol_bcache_free (objfile
->psymbol_cache
);
2447 objfile
->psymbol_cache
= psymbol_bcache_init ();
2448 bcache_xfree (objfile
->macro_cache
);
2449 objfile
->macro_cache
= bcache_xmalloc (NULL
, NULL
);
2450 bcache_xfree (objfile
->filename_cache
);
2451 objfile
->filename_cache
= bcache_xmalloc (NULL
,NULL
);
2452 if (objfile
->demangled_names_hash
!= NULL
)
2454 htab_delete (objfile
->demangled_names_hash
);
2455 objfile
->demangled_names_hash
= NULL
;
2457 obstack_free (&objfile
->objfile_obstack
, 0);
2458 objfile
->sections
= NULL
;
2459 objfile
->symtabs
= NULL
;
2460 objfile
->psymtabs
= NULL
;
2461 objfile
->psymtabs_addrmap
= NULL
;
2462 objfile
->free_psymtabs
= NULL
;
2463 objfile
->cp_namespace_symtab
= NULL
;
2464 objfile
->template_symbols
= NULL
;
2465 objfile
->msymbols
= NULL
;
2466 objfile
->deprecated_sym_private
= NULL
;
2467 objfile
->minimal_symbol_count
= 0;
2468 memset (&objfile
->msymbol_hash
, 0,
2469 sizeof (objfile
->msymbol_hash
));
2470 memset (&objfile
->msymbol_demangled_hash
, 0,
2471 sizeof (objfile
->msymbol_demangled_hash
));
2473 objfile
->psymbol_cache
= psymbol_bcache_init ();
2474 objfile
->macro_cache
= bcache_xmalloc (NULL
, NULL
);
2475 objfile
->filename_cache
= bcache_xmalloc (NULL
, NULL
);
2476 /* obstack_init also initializes the obstack so it is
2477 empty. We could use obstack_specify_allocation but
2478 gdb_obstack.h specifies the alloc/dealloc
2480 obstack_init (&objfile
->objfile_obstack
);
2481 if (build_objfile_section_table (objfile
))
2483 error (_("Can't find the file sections in `%s': %s"),
2484 objfile
->name
, bfd_errmsg (bfd_get_error ()));
2486 terminate_minimal_symbol_table (objfile
);
2488 /* We use the same section offsets as from last time. I'm not
2489 sure whether that is always correct for shared libraries. */
2490 objfile
->section_offsets
= (struct section_offsets
*)
2491 obstack_alloc (&objfile
->objfile_obstack
,
2492 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2493 memcpy (objfile
->section_offsets
, offsets
,
2494 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2495 objfile
->num_sections
= num_offsets
;
2497 /* What the hell is sym_new_init for, anyway? The concept of
2498 distinguishing between the main file and additional files
2499 in this way seems rather dubious. */
2500 if (objfile
== symfile_objfile
)
2502 (*objfile
->sf
->sym_new_init
) (objfile
);
2505 (*objfile
->sf
->sym_init
) (objfile
);
2506 clear_complaints (&symfile_complaints
, 1, 1);
2507 /* Do not set flags as this is safe and we don't want to be
2509 (*objfile
->sf
->sym_read
) (objfile
, 0);
2510 if (!objfile_has_symbols (objfile
))
2513 printf_unfiltered (_("(no debugging symbols found)\n"));
2517 /* We're done reading the symbol file; finish off complaints. */
2518 clear_complaints (&symfile_complaints
, 0, 1);
2520 /* Getting new symbols may change our opinion about what is
2523 reinit_frame_cache ();
2525 /* Discard cleanups as symbol reading was successful. */
2526 discard_cleanups (old_cleanups
);
2528 /* If the mtime has changed between the time we set new_modtime
2529 and now, we *want* this to be out of date, so don't call stat
2531 objfile
->mtime
= new_modtime
;
2533 init_entry_point_info (objfile
);
2539 /* Notify objfiles that we've modified objfile sections. */
2540 objfiles_changed ();
2542 clear_symtab_users (0);
2543 /* At least one objfile has changed, so we can consider that
2544 the executable we're debugging has changed too. */
2545 observer_notify_executable_changed ();
2558 static filename_language
*filename_language_table
;
2559 static int fl_table_size
, fl_table_next
;
2562 add_filename_language (char *ext
, enum language lang
)
2564 if (fl_table_next
>= fl_table_size
)
2566 fl_table_size
+= 10;
2567 filename_language_table
=
2568 xrealloc (filename_language_table
,
2569 fl_table_size
* sizeof (*filename_language_table
));
2572 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2573 filename_language_table
[fl_table_next
].lang
= lang
;
2577 static char *ext_args
;
2579 show_ext_args (struct ui_file
*file
, int from_tty
,
2580 struct cmd_list_element
*c
, const char *value
)
2582 fprintf_filtered (file
,
2583 _("Mapping between filename extension "
2584 "and source language is \"%s\".\n"),
2589 set_ext_lang_command (char *args
, int from_tty
, struct cmd_list_element
*e
)
2592 char *cp
= ext_args
;
2595 /* First arg is filename extension, starting with '.' */
2597 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2599 /* Find end of first arg. */
2600 while (*cp
&& !isspace (*cp
))
2604 error (_("'%s': two arguments required -- "
2605 "filename extension and language"),
2608 /* Null-terminate first arg */
2611 /* Find beginning of second arg, which should be a source language. */
2612 while (*cp
&& isspace (*cp
))
2616 error (_("'%s': two arguments required -- "
2617 "filename extension and language"),
2620 /* Lookup the language from among those we know. */
2621 lang
= language_enum (cp
);
2623 /* Now lookup the filename extension: do we already know it? */
2624 for (i
= 0; i
< fl_table_next
; i
++)
2625 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2628 if (i
>= fl_table_next
)
2630 /* new file extension */
2631 add_filename_language (ext_args
, lang
);
2635 /* redefining a previously known filename extension */
2638 /* query ("Really make files of type %s '%s'?", */
2639 /* ext_args, language_str (lang)); */
2641 xfree (filename_language_table
[i
].ext
);
2642 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2643 filename_language_table
[i
].lang
= lang
;
2648 info_ext_lang_command (char *args
, int from_tty
)
2652 printf_filtered (_("Filename extensions and the languages they represent:"));
2653 printf_filtered ("\n\n");
2654 for (i
= 0; i
< fl_table_next
; i
++)
2655 printf_filtered ("\t%s\t- %s\n",
2656 filename_language_table
[i
].ext
,
2657 language_str (filename_language_table
[i
].lang
));
2661 init_filename_language_table (void)
2663 if (fl_table_size
== 0) /* protect against repetition */
2667 filename_language_table
=
2668 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
2669 add_filename_language (".c", language_c
);
2670 add_filename_language (".d", language_d
);
2671 add_filename_language (".C", language_cplus
);
2672 add_filename_language (".cc", language_cplus
);
2673 add_filename_language (".cp", language_cplus
);
2674 add_filename_language (".cpp", language_cplus
);
2675 add_filename_language (".cxx", language_cplus
);
2676 add_filename_language (".c++", language_cplus
);
2677 add_filename_language (".java", language_java
);
2678 add_filename_language (".class", language_java
);
2679 add_filename_language (".m", language_objc
);
2680 add_filename_language (".f", language_fortran
);
2681 add_filename_language (".F", language_fortran
);
2682 add_filename_language (".for", language_fortran
);
2683 add_filename_language (".FOR", language_fortran
);
2684 add_filename_language (".ftn", language_fortran
);
2685 add_filename_language (".FTN", language_fortran
);
2686 add_filename_language (".fpp", language_fortran
);
2687 add_filename_language (".FPP", language_fortran
);
2688 add_filename_language (".f90", language_fortran
);
2689 add_filename_language (".F90", language_fortran
);
2690 add_filename_language (".f95", language_fortran
);
2691 add_filename_language (".F95", language_fortran
);
2692 add_filename_language (".f03", language_fortran
);
2693 add_filename_language (".F03", language_fortran
);
2694 add_filename_language (".f08", language_fortran
);
2695 add_filename_language (".F08", language_fortran
);
2696 add_filename_language (".s", language_asm
);
2697 add_filename_language (".sx", language_asm
);
2698 add_filename_language (".S", language_asm
);
2699 add_filename_language (".pas", language_pascal
);
2700 add_filename_language (".p", language_pascal
);
2701 add_filename_language (".pp", language_pascal
);
2702 add_filename_language (".adb", language_ada
);
2703 add_filename_language (".ads", language_ada
);
2704 add_filename_language (".a", language_ada
);
2705 add_filename_language (".ada", language_ada
);
2706 add_filename_language (".dg", language_ada
);
2711 deduce_language_from_filename (const char *filename
)
2716 if (filename
!= NULL
)
2717 if ((cp
= strrchr (filename
, '.')) != NULL
)
2718 for (i
= 0; i
< fl_table_next
; i
++)
2719 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2720 return filename_language_table
[i
].lang
;
2722 return language_unknown
;
2727 Allocate and partly initialize a new symbol table. Return a pointer
2728 to it. error() if no space.
2730 Caller must set these fields:
2739 allocate_symtab (const char *filename
, struct objfile
*objfile
)
2741 struct symtab
*symtab
;
2743 symtab
= (struct symtab
*)
2744 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symtab
));
2745 memset (symtab
, 0, sizeof (*symtab
));
2746 symtab
->filename
= (char *) bcache (filename
, strlen (filename
) + 1,
2747 objfile
->filename_cache
);
2748 symtab
->fullname
= NULL
;
2749 symtab
->language
= deduce_language_from_filename (filename
);
2750 symtab
->debugformat
= "unknown";
2752 /* Hook it to the objfile it comes from */
2754 symtab
->objfile
= objfile
;
2755 symtab
->next
= objfile
->symtabs
;
2756 objfile
->symtabs
= symtab
;
2762 /* Reset all data structures in gdb which may contain references to symbol
2763 table data. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
2766 clear_symtab_users (int add_flags
)
2768 /* Someday, we should do better than this, by only blowing away
2769 the things that really need to be blown. */
2771 /* Clear the "current" symtab first, because it is no longer valid.
2772 breakpoint_re_set may try to access the current symtab. */
2773 clear_current_source_symtab_and_line ();
2776 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
2777 breakpoint_re_set ();
2778 set_default_breakpoint (0, NULL
, 0, 0, 0);
2779 clear_pc_function_cache ();
2780 observer_notify_new_objfile (NULL
);
2782 /* Clear globals which might have pointed into a removed objfile.
2783 FIXME: It's not clear which of these are supposed to persist
2784 between expressions and which ought to be reset each time. */
2785 expression_context_block
= NULL
;
2786 innermost_block
= NULL
;
2788 /* Varobj may refer to old symbols, perform a cleanup. */
2789 varobj_invalidate ();
2794 clear_symtab_users_cleanup (void *ignore
)
2796 clear_symtab_users (0);
2800 The following code implements an abstraction for debugging overlay sections.
2802 The target model is as follows:
2803 1) The gnu linker will permit multiple sections to be mapped into the
2804 same VMA, each with its own unique LMA (or load address).
2805 2) It is assumed that some runtime mechanism exists for mapping the
2806 sections, one by one, from the load address into the VMA address.
2807 3) This code provides a mechanism for gdb to keep track of which
2808 sections should be considered to be mapped from the VMA to the LMA.
2809 This information is used for symbol lookup, and memory read/write.
2810 For instance, if a section has been mapped then its contents
2811 should be read from the VMA, otherwise from the LMA.
2813 Two levels of debugger support for overlays are available. One is
2814 "manual", in which the debugger relies on the user to tell it which
2815 overlays are currently mapped. This level of support is
2816 implemented entirely in the core debugger, and the information about
2817 whether a section is mapped is kept in the objfile->obj_section table.
2819 The second level of support is "automatic", and is only available if
2820 the target-specific code provides functionality to read the target's
2821 overlay mapping table, and translate its contents for the debugger
2822 (by updating the mapped state information in the obj_section tables).
2824 The interface is as follows:
2826 overlay map <name> -- tell gdb to consider this section mapped
2827 overlay unmap <name> -- tell gdb to consider this section unmapped
2828 overlay list -- list the sections that GDB thinks are mapped
2829 overlay read-target -- get the target's state of what's mapped
2830 overlay off/manual/auto -- set overlay debugging state
2831 Functional interface:
2832 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2833 section, return that section.
2834 find_pc_overlay(pc): find any overlay section that contains
2835 the pc, either in its VMA or its LMA
2836 section_is_mapped(sect): true if overlay is marked as mapped
2837 section_is_overlay(sect): true if section's VMA != LMA
2838 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2839 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2840 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2841 overlay_mapped_address(...): map an address from section's LMA to VMA
2842 overlay_unmapped_address(...): map an address from section's VMA to LMA
2843 symbol_overlayed_address(...): Return a "current" address for symbol:
2844 either in VMA or LMA depending on whether
2845 the symbol's section is currently mapped
2848 /* Overlay debugging state: */
2850 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2851 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
2853 /* Function: section_is_overlay (SECTION)
2854 Returns true if SECTION has VMA not equal to LMA, ie.
2855 SECTION is loaded at an address different from where it will "run". */
2858 section_is_overlay (struct obj_section
*section
)
2860 if (overlay_debugging
&& section
)
2862 bfd
*abfd
= section
->objfile
->obfd
;
2863 asection
*bfd_section
= section
->the_bfd_section
;
2865 if (bfd_section_lma (abfd
, bfd_section
) != 0
2866 && bfd_section_lma (abfd
, bfd_section
)
2867 != bfd_section_vma (abfd
, bfd_section
))
2874 /* Function: overlay_invalidate_all (void)
2875 Invalidate the mapped state of all overlay sections (mark it as stale). */
2878 overlay_invalidate_all (void)
2880 struct objfile
*objfile
;
2881 struct obj_section
*sect
;
2883 ALL_OBJSECTIONS (objfile
, sect
)
2884 if (section_is_overlay (sect
))
2885 sect
->ovly_mapped
= -1;
2888 /* Function: section_is_mapped (SECTION)
2889 Returns true if section is an overlay, and is currently mapped.
2891 Access to the ovly_mapped flag is restricted to this function, so
2892 that we can do automatic update. If the global flag
2893 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2894 overlay_invalidate_all. If the mapped state of the particular
2895 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2898 section_is_mapped (struct obj_section
*osect
)
2900 struct gdbarch
*gdbarch
;
2902 if (osect
== 0 || !section_is_overlay (osect
))
2905 switch (overlay_debugging
)
2909 return 0; /* overlay debugging off */
2910 case ovly_auto
: /* overlay debugging automatic */
2911 /* Unles there is a gdbarch_overlay_update function,
2912 there's really nothing useful to do here (can't really go auto) */
2913 gdbarch
= get_objfile_arch (osect
->objfile
);
2914 if (gdbarch_overlay_update_p (gdbarch
))
2916 if (overlay_cache_invalid
)
2918 overlay_invalidate_all ();
2919 overlay_cache_invalid
= 0;
2921 if (osect
->ovly_mapped
== -1)
2922 gdbarch_overlay_update (gdbarch
, osect
);
2924 /* fall thru to manual case */
2925 case ovly_on
: /* overlay debugging manual */
2926 return osect
->ovly_mapped
== 1;
2930 /* Function: pc_in_unmapped_range
2931 If PC falls into the lma range of SECTION, return true, else false. */
2934 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
2936 if (section_is_overlay (section
))
2938 bfd
*abfd
= section
->objfile
->obfd
;
2939 asection
*bfd_section
= section
->the_bfd_section
;
2941 /* We assume the LMA is relocated by the same offset as the VMA. */
2942 bfd_vma size
= bfd_get_section_size (bfd_section
);
2943 CORE_ADDR offset
= obj_section_offset (section
);
2945 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
2946 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
2953 /* Function: pc_in_mapped_range
2954 If PC falls into the vma range of SECTION, return true, else false. */
2957 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
2959 if (section_is_overlay (section
))
2961 if (obj_section_addr (section
) <= pc
2962 && pc
< obj_section_endaddr (section
))
2970 /* Return true if the mapped ranges of sections A and B overlap, false
2973 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
2975 CORE_ADDR a_start
= obj_section_addr (a
);
2976 CORE_ADDR a_end
= obj_section_endaddr (a
);
2977 CORE_ADDR b_start
= obj_section_addr (b
);
2978 CORE_ADDR b_end
= obj_section_endaddr (b
);
2980 return (a_start
< b_end
&& b_start
< a_end
);
2983 /* Function: overlay_unmapped_address (PC, SECTION)
2984 Returns the address corresponding to PC in the unmapped (load) range.
2985 May be the same as PC. */
2988 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
2990 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
2992 bfd
*abfd
= section
->objfile
->obfd
;
2993 asection
*bfd_section
= section
->the_bfd_section
;
2995 return pc
+ bfd_section_lma (abfd
, bfd_section
)
2996 - bfd_section_vma (abfd
, bfd_section
);
3002 /* Function: overlay_mapped_address (PC, SECTION)
3003 Returns the address corresponding to PC in the mapped (runtime) range.
3004 May be the same as PC. */
3007 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3009 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3011 bfd
*abfd
= section
->objfile
->obfd
;
3012 asection
*bfd_section
= section
->the_bfd_section
;
3014 return pc
+ bfd_section_vma (abfd
, bfd_section
)
3015 - bfd_section_lma (abfd
, bfd_section
);
3022 /* Function: symbol_overlayed_address
3023 Return one of two addresses (relative to the VMA or to the LMA),
3024 depending on whether the section is mapped or not. */
3027 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3029 if (overlay_debugging
)
3031 /* If the symbol has no section, just return its regular address. */
3034 /* If the symbol's section is not an overlay, just return its address */
3035 if (!section_is_overlay (section
))
3037 /* If the symbol's section is mapped, just return its address */
3038 if (section_is_mapped (section
))
3041 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3042 * then return its LOADED address rather than its vma address!!
3044 return overlay_unmapped_address (address
, section
);
3049 /* Function: find_pc_overlay (PC)
3050 Return the best-match overlay section for PC:
3051 If PC matches a mapped overlay section's VMA, return that section.
3052 Else if PC matches an unmapped section's VMA, return that section.
3053 Else if PC matches an unmapped section's LMA, return that section. */
3055 struct obj_section
*
3056 find_pc_overlay (CORE_ADDR pc
)
3058 struct objfile
*objfile
;
3059 struct obj_section
*osect
, *best_match
= NULL
;
3061 if (overlay_debugging
)
3062 ALL_OBJSECTIONS (objfile
, osect
)
3063 if (section_is_overlay (osect
))
3065 if (pc_in_mapped_range (pc
, osect
))
3067 if (section_is_mapped (osect
))
3072 else if (pc_in_unmapped_range (pc
, osect
))
3078 /* Function: find_pc_mapped_section (PC)
3079 If PC falls into the VMA address range of an overlay section that is
3080 currently marked as MAPPED, return that section. Else return NULL. */
3082 struct obj_section
*
3083 find_pc_mapped_section (CORE_ADDR pc
)
3085 struct objfile
*objfile
;
3086 struct obj_section
*osect
;
3088 if (overlay_debugging
)
3089 ALL_OBJSECTIONS (objfile
, osect
)
3090 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3096 /* Function: list_overlays_command
3097 Print a list of mapped sections and their PC ranges */
3100 list_overlays_command (char *args
, int from_tty
)
3103 struct objfile
*objfile
;
3104 struct obj_section
*osect
;
3106 if (overlay_debugging
)
3107 ALL_OBJSECTIONS (objfile
, osect
)
3108 if (section_is_mapped (osect
))
3110 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3115 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3116 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3117 size
= bfd_get_section_size (osect
->the_bfd_section
);
3118 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3120 printf_filtered ("Section %s, loaded at ", name
);
3121 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3122 puts_filtered (" - ");
3123 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3124 printf_filtered (", mapped at ");
3125 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3126 puts_filtered (" - ");
3127 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3128 puts_filtered ("\n");
3133 printf_filtered (_("No sections are mapped.\n"));
3136 /* Function: map_overlay_command
3137 Mark the named section as mapped (ie. residing at its VMA address). */
3140 map_overlay_command (char *args
, int from_tty
)
3142 struct objfile
*objfile
, *objfile2
;
3143 struct obj_section
*sec
, *sec2
;
3145 if (!overlay_debugging
)
3146 error (_("Overlay debugging not enabled. Use "
3147 "either the 'overlay auto' or\n"
3148 "the 'overlay manual' command."));
3150 if (args
== 0 || *args
== 0)
3151 error (_("Argument required: name of an overlay section"));
3153 /* First, find a section matching the user supplied argument */
3154 ALL_OBJSECTIONS (objfile
, sec
)
3155 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3157 /* Now, check to see if the section is an overlay. */
3158 if (!section_is_overlay (sec
))
3159 continue; /* not an overlay section */
3161 /* Mark the overlay as "mapped" */
3162 sec
->ovly_mapped
= 1;
3164 /* Next, make a pass and unmap any sections that are
3165 overlapped by this new section: */
3166 ALL_OBJSECTIONS (objfile2
, sec2
)
3167 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
, sec2
))
3170 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3171 bfd_section_name (objfile
->obfd
,
3172 sec2
->the_bfd_section
));
3173 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
3177 error (_("No overlay section called %s"), args
);
3180 /* Function: unmap_overlay_command
3181 Mark the overlay section as unmapped
3182 (ie. resident in its LMA address range, rather than the VMA range). */
3185 unmap_overlay_command (char *args
, int from_tty
)
3187 struct objfile
*objfile
;
3188 struct obj_section
*sec
;
3190 if (!overlay_debugging
)
3191 error (_("Overlay debugging not enabled. "
3192 "Use either the 'overlay auto' or\n"
3193 "the 'overlay manual' command."));
3195 if (args
== 0 || *args
== 0)
3196 error (_("Argument required: name of an overlay section"));
3198 /* First, find a section matching the user supplied argument */
3199 ALL_OBJSECTIONS (objfile
, sec
)
3200 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3202 if (!sec
->ovly_mapped
)
3203 error (_("Section %s is not mapped"), args
);
3204 sec
->ovly_mapped
= 0;
3207 error (_("No overlay section called %s"), args
);
3210 /* Function: overlay_auto_command
3211 A utility command to turn on overlay debugging.
3212 Possibly this should be done via a set/show command. */
3215 overlay_auto_command (char *args
, int from_tty
)
3217 overlay_debugging
= ovly_auto
;
3218 enable_overlay_breakpoints ();
3220 printf_unfiltered (_("Automatic overlay debugging enabled."));
3223 /* Function: overlay_manual_command
3224 A utility command to turn on overlay debugging.
3225 Possibly this should be done via a set/show command. */
3228 overlay_manual_command (char *args
, int from_tty
)
3230 overlay_debugging
= ovly_on
;
3231 disable_overlay_breakpoints ();
3233 printf_unfiltered (_("Overlay debugging enabled."));
3236 /* Function: overlay_off_command
3237 A utility command to turn on overlay debugging.
3238 Possibly this should be done via a set/show command. */
3241 overlay_off_command (char *args
, int from_tty
)
3243 overlay_debugging
= ovly_off
;
3244 disable_overlay_breakpoints ();
3246 printf_unfiltered (_("Overlay debugging disabled."));
3250 overlay_load_command (char *args
, int from_tty
)
3252 struct gdbarch
*gdbarch
= get_current_arch ();
3254 if (gdbarch_overlay_update_p (gdbarch
))
3255 gdbarch_overlay_update (gdbarch
, NULL
);
3257 error (_("This target does not know how to read its overlay state."));
3260 /* Function: overlay_command
3261 A place-holder for a mis-typed command */
3263 /* Command list chain containing all defined "overlay" subcommands. */
3264 struct cmd_list_element
*overlaylist
;
3267 overlay_command (char *args
, int from_tty
)
3270 ("\"overlay\" must be followed by the name of an overlay command.\n");
3271 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3275 /* Target Overlays for the "Simplest" overlay manager:
3277 This is GDB's default target overlay layer. It works with the
3278 minimal overlay manager supplied as an example by Cygnus. The
3279 entry point is via a function pointer "gdbarch_overlay_update",
3280 so targets that use a different runtime overlay manager can
3281 substitute their own overlay_update function and take over the
3284 The overlay_update function pokes around in the target's data structures
3285 to see what overlays are mapped, and updates GDB's overlay mapping with
3288 In this simple implementation, the target data structures are as follows:
3289 unsigned _novlys; /# number of overlay sections #/
3290 unsigned _ovly_table[_novlys][4] = {
3291 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3292 {..., ..., ..., ...},
3294 unsigned _novly_regions; /# number of overlay regions #/
3295 unsigned _ovly_region_table[_novly_regions][3] = {
3296 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3299 These functions will attempt to update GDB's mappedness state in the
3300 symbol section table, based on the target's mappedness state.
3302 To do this, we keep a cached copy of the target's _ovly_table, and
3303 attempt to detect when the cached copy is invalidated. The main
3304 entry point is "simple_overlay_update(SECT), which looks up SECT in
3305 the cached table and re-reads only the entry for that section from
3306 the target (whenever possible).
3309 /* Cached, dynamically allocated copies of the target data structures: */
3310 static unsigned (*cache_ovly_table
)[4] = 0;
3311 static unsigned cache_novlys
= 0;
3312 static CORE_ADDR cache_ovly_table_base
= 0;
3315 VMA
, SIZE
, LMA
, MAPPED
3318 /* Throw away the cached copy of _ovly_table */
3320 simple_free_overlay_table (void)
3322 if (cache_ovly_table
)
3323 xfree (cache_ovly_table
);
3325 cache_ovly_table
= NULL
;
3326 cache_ovly_table_base
= 0;
3329 /* Read an array of ints of size SIZE from the target into a local buffer.
3330 Convert to host order. int LEN is number of ints */
3332 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3333 int len
, int size
, enum bfd_endian byte_order
)
3335 /* FIXME (alloca): Not safe if array is very large. */
3336 gdb_byte
*buf
= alloca (len
* size
);
3339 read_memory (memaddr
, buf
, len
* size
);
3340 for (i
= 0; i
< len
; i
++)
3341 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3344 /* Find and grab a copy of the target _ovly_table
3345 (and _novlys, which is needed for the table's size) */
3347 simple_read_overlay_table (void)
3349 struct minimal_symbol
*novlys_msym
, *ovly_table_msym
;
3350 struct gdbarch
*gdbarch
;
3352 enum bfd_endian byte_order
;
3354 simple_free_overlay_table ();
3355 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3358 error (_("Error reading inferior's overlay table: "
3359 "couldn't find `_novlys' variable\n"
3360 "in inferior. Use `overlay manual' mode."));
3364 ovly_table_msym
= lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3365 if (! ovly_table_msym
)
3367 error (_("Error reading inferior's overlay table: couldn't find "
3368 "`_ovly_table' array\n"
3369 "in inferior. Use `overlay manual' mode."));
3373 gdbarch
= get_objfile_arch (msymbol_objfile (ovly_table_msym
));
3374 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3375 byte_order
= gdbarch_byte_order (gdbarch
);
3377 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
),
3380 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3381 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3382 read_target_long_array (cache_ovly_table_base
,
3383 (unsigned int *) cache_ovly_table
,
3384 cache_novlys
* 4, word_size
, byte_order
);
3386 return 1; /* SUCCESS */
3389 /* Function: simple_overlay_update_1
3390 A helper function for simple_overlay_update. Assuming a cached copy
3391 of _ovly_table exists, look through it to find an entry whose vma,
3392 lma and size match those of OSECT. Re-read the entry and make sure
3393 it still matches OSECT (else the table may no longer be valid).
3394 Set OSECT's mapped state to match the entry. Return: 1 for
3395 success, 0 for failure. */
3398 simple_overlay_update_1 (struct obj_section
*osect
)
3401 bfd
*obfd
= osect
->objfile
->obfd
;
3402 asection
*bsect
= osect
->the_bfd_section
;
3403 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3404 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3405 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3407 size
= bfd_get_section_size (osect
->the_bfd_section
);
3408 for (i
= 0; i
< cache_novlys
; i
++)
3409 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3410 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3411 /* && cache_ovly_table[i][SIZE] == size */ )
3413 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3414 (unsigned int *) cache_ovly_table
[i
],
3415 4, word_size
, byte_order
);
3416 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3417 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3418 /* && cache_ovly_table[i][SIZE] == size */ )
3420 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3423 else /* Warning! Warning! Target's ovly table has changed! */
3429 /* Function: simple_overlay_update
3430 If OSECT is NULL, then update all sections' mapped state
3431 (after re-reading the entire target _ovly_table).
3432 If OSECT is non-NULL, then try to find a matching entry in the
3433 cached ovly_table and update only OSECT's mapped state.
3434 If a cached entry can't be found or the cache isn't valid, then
3435 re-read the entire cache, and go ahead and update all sections. */
3438 simple_overlay_update (struct obj_section
*osect
)
3440 struct objfile
*objfile
;
3442 /* Were we given an osect to look up? NULL means do all of them. */
3444 /* Have we got a cached copy of the target's overlay table? */
3445 if (cache_ovly_table
!= NULL
)
3446 /* Does its cached location match what's currently in the symtab? */
3447 if (cache_ovly_table_base
==
3448 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table",
3450 /* Then go ahead and try to look up this single section in the cache */
3451 if (simple_overlay_update_1 (osect
))
3452 /* Found it! We're done. */
3455 /* Cached table no good: need to read the entire table anew.
3456 Or else we want all the sections, in which case it's actually
3457 more efficient to read the whole table in one block anyway. */
3459 if (! simple_read_overlay_table ())
3462 /* Now may as well update all sections, even if only one was requested. */
3463 ALL_OBJSECTIONS (objfile
, osect
)
3464 if (section_is_overlay (osect
))
3467 bfd
*obfd
= osect
->objfile
->obfd
;
3468 asection
*bsect
= osect
->the_bfd_section
;
3470 size
= bfd_get_section_size (bsect
);
3471 for (i
= 0; i
< cache_novlys
; i
++)
3472 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3473 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3474 /* && cache_ovly_table[i][SIZE] == size */ )
3475 { /* obj_section matches i'th entry in ovly_table */
3476 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3477 break; /* finished with inner for loop: break out */
3482 /* Set the output sections and output offsets for section SECTP in
3483 ABFD. The relocation code in BFD will read these offsets, so we
3484 need to be sure they're initialized. We map each section to itself,
3485 with no offset; this means that SECTP->vma will be honored. */
3488 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3490 sectp
->output_section
= sectp
;
3491 sectp
->output_offset
= 0;
3494 /* Default implementation for sym_relocate. */
3498 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3501 bfd
*abfd
= objfile
->obfd
;
3503 /* We're only interested in sections with relocation
3505 if ((sectp
->flags
& SEC_RELOC
) == 0)
3508 /* We will handle section offsets properly elsewhere, so relocate as if
3509 all sections begin at 0. */
3510 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3512 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3515 /* Relocate the contents of a debug section SECTP in ABFD. The
3516 contents are stored in BUF if it is non-NULL, or returned in a
3517 malloc'd buffer otherwise.
3519 For some platforms and debug info formats, shared libraries contain
3520 relocations against the debug sections (particularly for DWARF-2;
3521 one affected platform is PowerPC GNU/Linux, although it depends on
3522 the version of the linker in use). Also, ELF object files naturally
3523 have unresolved relocations for their debug sections. We need to apply
3524 the relocations in order to get the locations of symbols correct.
3525 Another example that may require relocation processing, is the
3526 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3530 symfile_relocate_debug_section (struct objfile
*objfile
,
3531 asection
*sectp
, bfd_byte
*buf
)
3533 gdb_assert (objfile
->sf
->sym_relocate
);
3535 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3538 struct symfile_segment_data
*
3539 get_symfile_segment_data (bfd
*abfd
)
3541 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3546 return sf
->sym_segments (abfd
);
3550 free_symfile_segment_data (struct symfile_segment_data
*data
)
3552 xfree (data
->segment_bases
);
3553 xfree (data
->segment_sizes
);
3554 xfree (data
->segment_info
);
3560 - DATA, containing segment addresses from the object file ABFD, and
3561 the mapping from ABFD's sections onto the segments that own them,
3563 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3564 segment addresses reported by the target,
3565 store the appropriate offsets for each section in OFFSETS.
3567 If there are fewer entries in SEGMENT_BASES than there are segments
3568 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3570 If there are more entries, then ignore the extra. The target may
3571 not be able to distinguish between an empty data segment and a
3572 missing data segment; a missing text segment is less plausible. */
3574 symfile_map_offsets_to_segments (bfd
*abfd
, struct symfile_segment_data
*data
,
3575 struct section_offsets
*offsets
,
3576 int num_segment_bases
,
3577 const CORE_ADDR
*segment_bases
)
3582 /* It doesn't make sense to call this function unless you have some
3583 segment base addresses. */
3584 gdb_assert (num_segment_bases
> 0);
3586 /* If we do not have segment mappings for the object file, we
3587 can not relocate it by segments. */
3588 gdb_assert (data
!= NULL
);
3589 gdb_assert (data
->num_segments
> 0);
3591 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3593 int which
= data
->segment_info
[i
];
3595 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
3597 /* Don't bother computing offsets for sections that aren't
3598 loaded as part of any segment. */
3602 /* Use the last SEGMENT_BASES entry as the address of any extra
3603 segments mentioned in DATA->segment_info. */
3604 if (which
> num_segment_bases
)
3605 which
= num_segment_bases
;
3607 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
3608 - data
->segment_bases
[which
- 1]);
3615 symfile_find_segment_sections (struct objfile
*objfile
)
3617 bfd
*abfd
= objfile
->obfd
;
3620 struct symfile_segment_data
*data
;
3622 data
= get_symfile_segment_data (objfile
->obfd
);
3626 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
3628 free_symfile_segment_data (data
);
3632 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3634 int which
= data
->segment_info
[i
];
3638 if (objfile
->sect_index_text
== -1)
3639 objfile
->sect_index_text
= sect
->index
;
3641 if (objfile
->sect_index_rodata
== -1)
3642 objfile
->sect_index_rodata
= sect
->index
;
3644 else if (which
== 2)
3646 if (objfile
->sect_index_data
== -1)
3647 objfile
->sect_index_data
= sect
->index
;
3649 if (objfile
->sect_index_bss
== -1)
3650 objfile
->sect_index_bss
= sect
->index
;
3654 free_symfile_segment_data (data
);
3658 _initialize_symfile (void)
3660 struct cmd_list_element
*c
;
3662 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3663 Load symbol table from executable file FILE.\n\
3664 The `file' command can also load symbol tables, as well as setting the file\n\
3665 to execute."), &cmdlist
);
3666 set_cmd_completer (c
, filename_completer
);
3668 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3669 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3670 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR>\
3671 ...]\nADDR is the starting address of the file's text.\n\
3672 The optional arguments are section-name section-address pairs and\n\
3673 should be specified if the data and bss segments are not contiguous\n\
3674 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3676 set_cmd_completer (c
, filename_completer
);
3678 c
= add_cmd ("load", class_files
, load_command
, _("\
3679 Dynamically load FILE into the running program, and record its symbols\n\
3680 for access from GDB.\n\
3681 A load OFFSET may also be given."), &cmdlist
);
3682 set_cmd_completer (c
, filename_completer
);
3684 add_setshow_boolean_cmd ("symbol-reloading", class_support
,
3685 &symbol_reloading
, _("\
3686 Set dynamic symbol table reloading multiple times in one run."), _("\
3687 Show dynamic symbol table reloading multiple times in one run."), NULL
,
3689 show_symbol_reloading
,
3690 &setlist
, &showlist
);
3692 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3693 _("Commands for debugging overlays."), &overlaylist
,
3694 "overlay ", 0, &cmdlist
);
3696 add_com_alias ("ovly", "overlay", class_alias
, 1);
3697 add_com_alias ("ov", "overlay", class_alias
, 1);
3699 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3700 _("Assert that an overlay section is mapped."), &overlaylist
);
3702 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3703 _("Assert that an overlay section is unmapped."), &overlaylist
);
3705 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3706 _("List mappings of overlay sections."), &overlaylist
);
3708 add_cmd ("manual", class_support
, overlay_manual_command
,
3709 _("Enable overlay debugging."), &overlaylist
);
3710 add_cmd ("off", class_support
, overlay_off_command
,
3711 _("Disable overlay debugging."), &overlaylist
);
3712 add_cmd ("auto", class_support
, overlay_auto_command
,
3713 _("Enable automatic overlay debugging."), &overlaylist
);
3714 add_cmd ("load-target", class_support
, overlay_load_command
,
3715 _("Read the overlay mapping state from the target."), &overlaylist
);
3717 /* Filename extension to source language lookup table: */
3718 init_filename_language_table ();
3719 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3721 Set mapping between filename extension and source language."), _("\
3722 Show mapping between filename extension and source language."), _("\
3723 Usage: set extension-language .foo bar"),
3724 set_ext_lang_command
,
3726 &setlist
, &showlist
);
3728 add_info ("extensions", info_ext_lang_command
,
3729 _("All filename extensions associated with a source language."));
3731 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3732 &debug_file_directory
, _("\
3733 Set the directories where separate debug symbols are searched for."), _("\
3734 Show the directories where separate debug symbols are searched for."), _("\
3735 Separate debug symbols are first searched for in the same\n\
3736 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3737 and lastly at the path of the directory of the binary with\n\
3738 each global debug-file-directory component prepended."),
3740 show_debug_file_directory
,
3741 &setlist
, &showlist
);