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
654 ABFD_ADDRS_SORTED. */
656 addrs_to_abfd_addrs
= xzalloc (sizeof (*addrs_to_abfd_addrs
)
657 * addrs
->num_sections
);
658 make_cleanup (xfree
, addrs_to_abfd_addrs
);
660 while (*addrs_sorted
)
662 const char *sect_name
= addr_section_name ((*addrs_sorted
)->name
);
664 while (*abfd_addrs_sorted
665 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
669 if (*abfd_addrs_sorted
670 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
675 /* Make the found item directly addressable from ADDRS. */
676 index_in_addrs
= *addrs_sorted
- addrs
->other
;
677 gdb_assert (addrs_to_abfd_addrs
[index_in_addrs
] == NULL
);
678 addrs_to_abfd_addrs
[index_in_addrs
] = *abfd_addrs_sorted
;
680 /* Never use the same ABFD entry twice. */
687 /* Calculate offsets for the loadable sections.
688 FIXME! Sections must be in order of increasing loadable section
689 so that contiguous sections can use the lower-offset!!!
691 Adjust offsets if the segments are not contiguous.
692 If the section is contiguous, its offset should be set to
693 the offset of the highest loadable section lower than it
694 (the loadable section directly below it in memory).
695 this_offset = lower_offset = lower_addr - lower_orig_addr */
697 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
699 struct other_sections
*sect
= addrs_to_abfd_addrs
[i
];
703 /* This is the index used by BFD. */
704 addrs
->other
[i
].sectindex
= sect
->sectindex
;
706 if (addrs
->other
[i
].addr
!= 0)
708 addrs
->other
[i
].addr
-= sect
->addr
;
709 lower_offset
= addrs
->other
[i
].addr
;
712 addrs
->other
[i
].addr
= lower_offset
;
716 /* addr_section_name transformation is not used for SECT_NAME. */
717 const char *sect_name
= addrs
->other
[i
].name
;
719 /* This section does not exist in ABFD, which is normally
720 unexpected and we want to issue a warning.
722 However, the ELF prelinker does create a few sections which are
723 marked in the main executable as loadable (they are loaded in
724 memory from the DYNAMIC segment) and yet are not present in
725 separate debug info files. This is fine, and should not cause
726 a warning. Shared libraries contain just the section
727 ".gnu.liblist" but it is not marked as loadable there. There is
728 no other way to identify them than by their name as the sections
729 created by prelink have no special flags.
731 For the sections `.bss' and `.sbss' see addr_section_name. */
733 if (!(strcmp (sect_name
, ".gnu.liblist") == 0
734 || strcmp (sect_name
, ".gnu.conflict") == 0
735 || (strcmp (sect_name
, ".bss") == 0
737 && strcmp (addrs
->other
[i
- 1].name
, ".dynbss") == 0
738 && addrs_to_abfd_addrs
[i
- 1] != NULL
)
739 || (strcmp (sect_name
, ".sbss") == 0
741 && strcmp (addrs
->other
[i
- 1].name
, ".sdynbss") == 0
742 && addrs_to_abfd_addrs
[i
- 1] != NULL
)))
743 warning (_("section %s not found in %s"), sect_name
,
744 bfd_get_filename (abfd
));
746 addrs
->other
[i
].addr
= 0;
748 /* SECTINDEX is invalid if ADDR is zero. */
752 do_cleanups (my_cleanup
);
755 /* Parse the user's idea of an offset for dynamic linking, into our idea
756 of how to represent it for fast symbol reading. This is the default
757 version of the sym_fns.sym_offsets function for symbol readers that
758 don't need to do anything special. It allocates a section_offsets table
759 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
762 default_symfile_offsets (struct objfile
*objfile
,
763 struct section_addr_info
*addrs
)
765 objfile
->num_sections
= bfd_count_sections (objfile
->obfd
);
766 objfile
->section_offsets
= (struct section_offsets
*)
767 obstack_alloc (&objfile
->objfile_obstack
,
768 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
769 relative_addr_info_to_section_offsets (objfile
->section_offsets
,
770 objfile
->num_sections
, addrs
);
772 /* For relocatable files, all loadable sections will start at zero.
773 The zero is meaningless, so try to pick arbitrary addresses such
774 that no loadable sections overlap. This algorithm is quadratic,
775 but the number of sections in a single object file is generally
777 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
779 struct place_section_arg arg
;
780 bfd
*abfd
= objfile
->obfd
;
783 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
784 /* We do not expect this to happen; just skip this step if the
785 relocatable file has a section with an assigned VMA. */
786 if (bfd_section_vma (abfd
, cur_sec
) != 0)
791 CORE_ADDR
*offsets
= objfile
->section_offsets
->offsets
;
793 /* Pick non-overlapping offsets for sections the user did not
795 arg
.offsets
= objfile
->section_offsets
;
797 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
799 /* Correctly filling in the section offsets is not quite
800 enough. Relocatable files have two properties that
801 (most) shared objects do not:
803 - Their debug information will contain relocations. Some
804 shared libraries do also, but many do not, so this can not
807 - If there are multiple code sections they will be loaded
808 at different relative addresses in memory than they are
809 in the objfile, since all sections in the file will start
812 Because GDB has very limited ability to map from an
813 address in debug info to the correct code section,
814 it relies on adding SECT_OFF_TEXT to things which might be
815 code. If we clear all the section offsets, and set the
816 section VMAs instead, then symfile_relocate_debug_section
817 will return meaningful debug information pointing at the
820 GDB has too many different data structures for section
821 addresses - a bfd, objfile, and so_list all have section
822 tables, as does exec_ops. Some of these could probably
825 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
826 cur_sec
= cur_sec
->next
)
828 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
831 bfd_set_section_vma (abfd
, cur_sec
, offsets
[cur_sec
->index
]);
832 exec_set_section_address (bfd_get_filename (abfd
),
834 offsets
[cur_sec
->index
]);
835 offsets
[cur_sec
->index
] = 0;
840 /* Remember the bfd indexes for the .text, .data, .bss and
842 init_objfile_sect_indices (objfile
);
846 /* Divide the file into segments, which are individual relocatable units.
847 This is the default version of the sym_fns.sym_segments function for
848 symbol readers that do not have an explicit representation of segments.
849 It assumes that object files do not have segments, and fully linked
850 files have a single segment. */
852 struct symfile_segment_data
*
853 default_symfile_segments (bfd
*abfd
)
857 struct symfile_segment_data
*data
;
860 /* Relocatable files contain enough information to position each
861 loadable section independently; they should not be relocated
863 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
866 /* Make sure there is at least one loadable section in the file. */
867 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
869 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
877 low
= bfd_get_section_vma (abfd
, sect
);
878 high
= low
+ bfd_get_section_size (sect
);
880 data
= XZALLOC (struct symfile_segment_data
);
881 data
->num_segments
= 1;
882 data
->segment_bases
= XCALLOC (1, CORE_ADDR
);
883 data
->segment_sizes
= XCALLOC (1, CORE_ADDR
);
885 num_sections
= bfd_count_sections (abfd
);
886 data
->segment_info
= XCALLOC (num_sections
, int);
888 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
892 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
895 vma
= bfd_get_section_vma (abfd
, sect
);
898 if (vma
+ bfd_get_section_size (sect
) > high
)
899 high
= vma
+ bfd_get_section_size (sect
);
901 data
->segment_info
[i
] = 1;
904 data
->segment_bases
[0] = low
;
905 data
->segment_sizes
[0] = high
- low
;
910 /* Process a symbol file, as either the main file or as a dynamically
913 OBJFILE is where the symbols are to be read from.
915 ADDRS is the list of section load addresses. If the user has given
916 an 'add-symbol-file' command, then this is the list of offsets and
917 addresses he or she provided as arguments to the command; or, if
918 we're handling a shared library, these are the actual addresses the
919 sections are loaded at, according to the inferior's dynamic linker
920 (as gleaned by GDB's shared library code). We convert each address
921 into an offset from the section VMA's as it appears in the object
922 file, and then call the file's sym_offsets function to convert this
923 into a format-specific offset table --- a `struct section_offsets'.
924 If ADDRS is non-zero, OFFSETS must be zero.
926 OFFSETS is a table of section offsets already in the right
927 format-specific representation. NUM_OFFSETS is the number of
928 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
929 assume this is the proper table the call to sym_offsets described
930 above would produce. Instead of calling sym_offsets, we just dump
931 it right into objfile->section_offsets. (When we're re-reading
932 symbols from an objfile, we don't have the original load address
933 list any more; all we have is the section offset table.) If
934 OFFSETS is non-zero, ADDRS must be zero.
936 ADD_FLAGS encodes verbosity level, whether this is main symbol or
937 an extra symbol file such as dynamically loaded code, and wether
938 breakpoint reset should be deferred. */
941 syms_from_objfile (struct objfile
*objfile
,
942 struct section_addr_info
*addrs
,
943 struct section_offsets
*offsets
,
947 struct section_addr_info
*local_addr
= NULL
;
948 struct cleanup
*old_chain
;
949 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
951 gdb_assert (! (addrs
&& offsets
));
953 init_entry_point_info (objfile
);
954 objfile
->sf
= find_sym_fns (objfile
->obfd
);
956 if (objfile
->sf
== NULL
)
957 return; /* No symbols. */
959 /* Make sure that partially constructed symbol tables will be cleaned up
960 if an error occurs during symbol reading. */
961 old_chain
= make_cleanup_free_objfile (objfile
);
963 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
964 list. We now establish the convention that an addr of zero means
965 no load address was specified. */
966 if (! addrs
&& ! offsets
)
969 = alloc_section_addr_info (bfd_count_sections (objfile
->obfd
));
970 make_cleanup (xfree
, local_addr
);
974 /* Now either addrs or offsets is non-zero. */
978 /* We will modify the main symbol table, make sure that all its users
979 will be cleaned up if an error occurs during symbol reading. */
980 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
982 /* Since no error yet, throw away the old symbol table. */
984 if (symfile_objfile
!= NULL
)
986 free_objfile (symfile_objfile
);
987 gdb_assert (symfile_objfile
== NULL
);
990 /* Currently we keep symbols from the add-symbol-file command.
991 If the user wants to get rid of them, they should do "symbol-file"
992 without arguments first. Not sure this is the best behavior
995 (*objfile
->sf
->sym_new_init
) (objfile
);
998 /* Convert addr into an offset rather than an absolute address.
999 We find the lowest address of a loaded segment in the objfile,
1000 and assume that <addr> is where that got loaded.
1002 We no longer warn if the lowest section is not a text segment (as
1003 happens for the PA64 port. */
1004 if (addrs
&& addrs
->other
[0].name
)
1005 addr_info_make_relative (addrs
, objfile
->obfd
);
1007 /* Initialize symbol reading routines for this objfile, allow complaints to
1008 appear for this new file, and record how verbose to be, then do the
1009 initial symbol reading for this file. */
1011 (*objfile
->sf
->sym_init
) (objfile
);
1012 clear_complaints (&symfile_complaints
, 1, add_flags
& SYMFILE_VERBOSE
);
1015 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
1018 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_offsets
);
1020 /* Just copy in the offset table directly as given to us. */
1021 objfile
->num_sections
= num_offsets
;
1022 objfile
->section_offsets
1023 = ((struct section_offsets
*)
1024 obstack_alloc (&objfile
->objfile_obstack
, size
));
1025 memcpy (objfile
->section_offsets
, offsets
, size
);
1027 init_objfile_sect_indices (objfile
);
1030 (*objfile
->sf
->sym_read
) (objfile
, add_flags
);
1032 /* Discard cleanups as symbol reading was successful. */
1034 discard_cleanups (old_chain
);
1038 /* Perform required actions after either reading in the initial
1039 symbols for a new objfile, or mapping in the symbols from a reusable
1040 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
1043 new_symfile_objfile (struct objfile
*objfile
, int add_flags
)
1045 /* If this is the main symbol file we have to clean up all users of the
1046 old main symbol file. Otherwise it is sufficient to fixup all the
1047 breakpoints that may have been redefined by this symbol file. */
1048 if (add_flags
& SYMFILE_MAINLINE
)
1050 /* OK, make it the "real" symbol file. */
1051 symfile_objfile
= objfile
;
1053 clear_symtab_users (add_flags
);
1055 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
1057 breakpoint_re_set ();
1060 /* We're done reading the symbol file; finish off complaints. */
1061 clear_complaints (&symfile_complaints
, 0, add_flags
& SYMFILE_VERBOSE
);
1064 /* Process a symbol file, as either the main file or as a dynamically
1067 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1068 This BFD will be closed on error, and is always consumed by this function.
1070 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1071 extra, such as dynamically loaded code, and what to do with breakpoins.
1073 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
1074 syms_from_objfile, above.
1075 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1077 Upon success, returns a pointer to the objfile that was added.
1078 Upon failure, jumps back to command level (never returns). */
1080 static struct objfile
*
1081 symbol_file_add_with_addrs_or_offsets (bfd
*abfd
,
1083 struct section_addr_info
*addrs
,
1084 struct section_offsets
*offsets
,
1088 struct objfile
*objfile
;
1089 struct cleanup
*my_cleanups
;
1090 const char *name
= bfd_get_filename (abfd
);
1091 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1093 if (readnow_symbol_files
)
1094 flags
|= OBJF_READNOW
;
1096 my_cleanups
= make_cleanup_bfd_close (abfd
);
1098 /* Give user a chance to burp if we'd be
1099 interactively wiping out any existing symbols. */
1101 if ((have_full_symbols () || have_partial_symbols ())
1102 && (add_flags
& SYMFILE_MAINLINE
)
1104 && !query (_("Load new symbol table from \"%s\"? "), name
))
1105 error (_("Not confirmed."));
1107 objfile
= allocate_objfile (abfd
, flags
);
1108 discard_cleanups (my_cleanups
);
1110 /* We either created a new mapped symbol table, mapped an existing
1111 symbol table file which has not had initial symbol reading
1112 performed, or need to read an unmapped symbol table. */
1113 if (from_tty
|| info_verbose
)
1115 if (deprecated_pre_add_symbol_hook
)
1116 deprecated_pre_add_symbol_hook (name
);
1119 printf_unfiltered (_("Reading symbols from %s..."), name
);
1121 gdb_flush (gdb_stdout
);
1124 syms_from_objfile (objfile
, addrs
, offsets
, num_offsets
,
1127 /* We now have at least a partial symbol table. Check to see if the
1128 user requested that all symbols be read on initial access via either
1129 the gdb startup command line or on a per symbol file basis. Expand
1130 all partial symbol tables for this objfile if so. */
1132 if ((flags
& OBJF_READNOW
))
1134 if (from_tty
|| info_verbose
)
1136 printf_unfiltered (_("expanding to full symbols..."));
1138 gdb_flush (gdb_stdout
);
1142 objfile
->sf
->qf
->expand_all_symtabs (objfile
);
1145 if ((from_tty
|| info_verbose
)
1146 && !objfile_has_symbols (objfile
))
1149 printf_unfiltered (_("(no debugging symbols found)..."));
1153 if (from_tty
|| info_verbose
)
1155 if (deprecated_post_add_symbol_hook
)
1156 deprecated_post_add_symbol_hook ();
1158 printf_unfiltered (_("done.\n"));
1161 /* We print some messages regardless of whether 'from_tty ||
1162 info_verbose' is true, so make sure they go out at the right
1164 gdb_flush (gdb_stdout
);
1166 do_cleanups (my_cleanups
);
1168 if (objfile
->sf
== NULL
)
1170 observer_notify_new_objfile (objfile
);
1171 return objfile
; /* No symbols. */
1174 new_symfile_objfile (objfile
, add_flags
);
1176 observer_notify_new_objfile (objfile
);
1178 bfd_cache_close_all ();
1182 /* Add BFD as a separate debug file for OBJFILE. */
1185 symbol_file_add_separate (bfd
*bfd
, int symfile_flags
, struct objfile
*objfile
)
1187 struct objfile
*new_objfile
;
1188 struct section_addr_info
*sap
;
1189 struct cleanup
*my_cleanup
;
1191 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1192 because sections of BFD may not match sections of OBJFILE and because
1193 vma may have been modified by tools such as prelink. */
1194 sap
= build_section_addr_info_from_objfile (objfile
);
1195 my_cleanup
= make_cleanup_free_section_addr_info (sap
);
1197 new_objfile
= symbol_file_add_with_addrs_or_offsets
1198 (bfd
, symfile_flags
,
1200 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1201 | OBJF_USERLOADED
));
1203 do_cleanups (my_cleanup
);
1205 add_separate_debug_objfile (new_objfile
, objfile
);
1208 /* Process the symbol file ABFD, as either the main file or as a
1209 dynamically loaded file.
1211 See symbol_file_add_with_addrs_or_offsets's comments for
1214 symbol_file_add_from_bfd (bfd
*abfd
, int add_flags
,
1215 struct section_addr_info
*addrs
,
1218 return symbol_file_add_with_addrs_or_offsets (abfd
, add_flags
, addrs
, 0, 0,
1223 /* Process a symbol file, as either the main file or as a dynamically
1224 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
1227 symbol_file_add (char *name
, int add_flags
, struct section_addr_info
*addrs
,
1230 return symbol_file_add_from_bfd (symfile_bfd_open (name
), add_flags
, addrs
,
1235 /* Call symbol_file_add() with default values and update whatever is
1236 affected by the loading of a new main().
1237 Used when the file is supplied in the gdb command line
1238 and by some targets with special loading requirements.
1239 The auxiliary function, symbol_file_add_main_1(), has the flags
1240 argument for the switches that can only be specified in the symbol_file
1244 symbol_file_add_main (char *args
, int from_tty
)
1246 symbol_file_add_main_1 (args
, from_tty
, 0);
1250 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
1252 const int add_flags
= SYMFILE_MAINLINE
| (from_tty
? SYMFILE_VERBOSE
: 0);
1253 symbol_file_add (args
, add_flags
, NULL
, flags
);
1255 /* Getting new symbols may change our opinion about
1256 what is frameless. */
1257 reinit_frame_cache ();
1259 set_initial_language ();
1263 symbol_file_clear (int from_tty
)
1265 if ((have_full_symbols () || have_partial_symbols ())
1268 ? !query (_("Discard symbol table from `%s'? "),
1269 symfile_objfile
->name
)
1270 : !query (_("Discard symbol table? "))))
1271 error (_("Not confirmed."));
1273 /* solib descriptors may have handles to objfiles. Wipe them before their
1274 objfiles get stale by free_all_objfiles. */
1275 no_shared_libraries (NULL
, from_tty
);
1277 free_all_objfiles ();
1279 gdb_assert (symfile_objfile
== NULL
);
1281 printf_unfiltered (_("No symbol file now.\n"));
1285 get_debug_link_info (struct objfile
*objfile
, unsigned long *crc32_out
)
1288 bfd_size_type debuglink_size
;
1289 unsigned long crc32
;
1293 sect
= bfd_get_section_by_name (objfile
->obfd
, ".gnu_debuglink");
1298 debuglink_size
= bfd_section_size (objfile
->obfd
, sect
);
1300 contents
= xmalloc (debuglink_size
);
1301 bfd_get_section_contents (objfile
->obfd
, sect
, contents
,
1302 (file_ptr
)0, (bfd_size_type
)debuglink_size
);
1304 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1305 crc_offset
= strlen (contents
) + 1;
1306 crc_offset
= (crc_offset
+ 3) & ~3;
1308 crc32
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) (contents
+ crc_offset
));
1315 separate_debug_file_exists (const char *name
, unsigned long crc
,
1316 struct objfile
*parent_objfile
)
1318 unsigned long file_crc
= 0;
1320 gdb_byte buffer
[8*1024];
1322 struct stat parent_stat
, abfd_stat
;
1324 /* Find a separate debug info file as if symbols would be present in
1325 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1326 section can contain just the basename of PARENT_OBJFILE without any
1327 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1328 the separate debug infos with the same basename can exist. */
1330 if (strcmp (name
, parent_objfile
->name
) == 0)
1333 abfd
= bfd_open_maybe_remote (name
);
1338 /* Verify symlinks were not the cause of strcmp name difference above.
1340 Some operating systems, e.g. Windows, do not provide a meaningful
1341 st_ino; they always set it to zero. (Windows does provide a
1342 meaningful st_dev.) Do not indicate a duplicate library in that
1343 case. While there is no guarantee that a system that provides
1344 meaningful inode numbers will never set st_ino to zero, this is
1345 merely an optimization, so we do not need to worry about false
1348 if (bfd_stat (abfd
, &abfd_stat
) == 0
1349 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0
1350 && abfd_stat
.st_dev
== parent_stat
.st_dev
1351 && abfd_stat
.st_ino
== parent_stat
.st_ino
1352 && abfd_stat
.st_ino
!= 0)
1358 while ((count
= bfd_bread (buffer
, sizeof (buffer
), abfd
)) > 0)
1359 file_crc
= gnu_debuglink_crc32 (file_crc
, buffer
, count
);
1363 if (crc
!= file_crc
)
1365 warning (_("the debug information found in \"%s\""
1366 " does not match \"%s\" (CRC mismatch).\n"),
1367 name
, parent_objfile
->name
);
1374 char *debug_file_directory
= NULL
;
1376 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1377 struct cmd_list_element
*c
, const char *value
)
1379 fprintf_filtered (file
,
1380 _("The directory where separate debug "
1381 "symbols are searched for is \"%s\".\n"),
1385 #if ! defined (DEBUG_SUBDIRECTORY)
1386 #define DEBUG_SUBDIRECTORY ".debug"
1390 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1392 char *basename
, *debugdir
;
1394 char *debugfile
= NULL
;
1395 char *canon_name
= NULL
;
1396 unsigned long crc32
;
1399 basename
= get_debug_link_info (objfile
, &crc32
);
1401 if (basename
== NULL
)
1402 /* There's no separate debug info, hence there's no way we could
1403 load it => no warning. */
1404 goto cleanup_return_debugfile
;
1406 dir
= xstrdup (objfile
->name
);
1408 /* Strip off the final filename part, leaving the directory name,
1409 followed by a slash. The directory can be relative or absolute. */
1410 for (i
= strlen(dir
) - 1; i
>= 0; i
--)
1412 if (IS_DIR_SEPARATOR (dir
[i
]))
1415 /* If I is -1 then no directory is present there and DIR will be "". */
1418 /* Set I to max (strlen (canon_name), strlen (dir)). */
1419 canon_name
= lrealpath (dir
);
1421 if (canon_name
&& strlen (canon_name
) > i
)
1422 i
= strlen (canon_name
);
1424 debugfile
= xmalloc (strlen (debug_file_directory
) + 1
1426 + strlen (DEBUG_SUBDIRECTORY
)
1431 /* First try in the same directory as the original file. */
1432 strcpy (debugfile
, dir
);
1433 strcat (debugfile
, basename
);
1435 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1436 goto cleanup_return_debugfile
;
1438 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1439 strcpy (debugfile
, dir
);
1440 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1441 strcat (debugfile
, "/");
1442 strcat (debugfile
, basename
);
1444 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1445 goto cleanup_return_debugfile
;
1447 /* Then try in the global debugfile directories.
1449 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1450 cause "/..." lookups. */
1452 debugdir
= debug_file_directory
;
1457 while (*debugdir
== DIRNAME_SEPARATOR
)
1460 debugdir_end
= strchr (debugdir
, DIRNAME_SEPARATOR
);
1461 if (debugdir_end
== NULL
)
1462 debugdir_end
= &debugdir
[strlen (debugdir
)];
1464 memcpy (debugfile
, debugdir
, debugdir_end
- debugdir
);
1465 debugfile
[debugdir_end
- debugdir
] = 0;
1466 strcat (debugfile
, "/");
1467 strcat (debugfile
, dir
);
1468 strcat (debugfile
, basename
);
1470 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1471 goto cleanup_return_debugfile
;
1473 /* If the file is in the sysroot, try using its base path in the
1474 global debugfile directory. */
1476 && strncmp (canon_name
, gdb_sysroot
, strlen (gdb_sysroot
)) == 0
1477 && IS_DIR_SEPARATOR (canon_name
[strlen (gdb_sysroot
)]))
1479 memcpy (debugfile
, debugdir
, debugdir_end
- debugdir
);
1480 debugfile
[debugdir_end
- debugdir
] = 0;
1481 strcat (debugfile
, canon_name
+ strlen (gdb_sysroot
));
1482 strcat (debugfile
, "/");
1483 strcat (debugfile
, basename
);
1485 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1486 goto cleanup_return_debugfile
;
1489 debugdir
= debugdir_end
;
1491 while (*debugdir
!= 0);
1496 cleanup_return_debugfile
:
1504 /* This is the symbol-file command. Read the file, analyze its
1505 symbols, and add a struct symtab to a symtab list. The syntax of
1506 the command is rather bizarre:
1508 1. The function buildargv implements various quoting conventions
1509 which are undocumented and have little or nothing in common with
1510 the way things are quoted (or not quoted) elsewhere in GDB.
1512 2. Options are used, which are not generally used in GDB (perhaps
1513 "set mapped on", "set readnow on" would be better)
1515 3. The order of options matters, which is contrary to GNU
1516 conventions (because it is confusing and inconvenient). */
1519 symbol_file_command (char *args
, int from_tty
)
1525 symbol_file_clear (from_tty
);
1529 char **argv
= gdb_buildargv (args
);
1530 int flags
= OBJF_USERLOADED
;
1531 struct cleanup
*cleanups
;
1534 cleanups
= make_cleanup_freeargv (argv
);
1535 while (*argv
!= NULL
)
1537 if (strcmp (*argv
, "-readnow") == 0)
1538 flags
|= OBJF_READNOW
;
1539 else if (**argv
== '-')
1540 error (_("unknown option `%s'"), *argv
);
1543 symbol_file_add_main_1 (*argv
, from_tty
, flags
);
1551 error (_("no symbol file name was specified"));
1553 do_cleanups (cleanups
);
1557 /* Set the initial language.
1559 FIXME: A better solution would be to record the language in the
1560 psymtab when reading partial symbols, and then use it (if known) to
1561 set the language. This would be a win for formats that encode the
1562 language in an easily discoverable place, such as DWARF. For
1563 stabs, we can jump through hoops looking for specially named
1564 symbols or try to intuit the language from the specific type of
1565 stabs we find, but we can't do that until later when we read in
1569 set_initial_language (void)
1571 enum language lang
= language_unknown
;
1573 if (language_of_main
!= language_unknown
)
1574 lang
= language_of_main
;
1577 const char *filename
;
1579 filename
= find_main_filename ();
1580 if (filename
!= NULL
)
1581 lang
= deduce_language_from_filename (filename
);
1584 if (lang
== language_unknown
)
1586 /* Make C the default language */
1590 set_language (lang
);
1591 expected_language
= current_language
; /* Don't warn the user. */
1594 /* If NAME is a remote name open the file using remote protocol, otherwise
1595 open it normally. */
1598 bfd_open_maybe_remote (const char *name
)
1600 if (remote_filename_p (name
))
1601 return remote_bfd_open (name
, gnutarget
);
1603 return bfd_openr (name
, gnutarget
);
1607 /* Open the file specified by NAME and hand it off to BFD for
1608 preliminary analysis. Return a newly initialized bfd *, which
1609 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1610 absolute). In case of trouble, error() is called. */
1613 symfile_bfd_open (char *name
)
1617 char *absolute_name
;
1619 if (remote_filename_p (name
))
1621 name
= xstrdup (name
);
1622 sym_bfd
= remote_bfd_open (name
, gnutarget
);
1625 make_cleanup (xfree
, name
);
1626 error (_("`%s': can't open to read symbols: %s."), name
,
1627 bfd_errmsg (bfd_get_error ()));
1630 if (!bfd_check_format (sym_bfd
, bfd_object
))
1632 bfd_close (sym_bfd
);
1633 make_cleanup (xfree
, name
);
1634 error (_("`%s': can't read symbols: %s."), name
,
1635 bfd_errmsg (bfd_get_error ()));
1641 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy. */
1643 /* Look down path for it, allocate 2nd new malloc'd copy. */
1644 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, name
,
1645 O_RDONLY
| O_BINARY
, &absolute_name
);
1646 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1649 char *exename
= alloca (strlen (name
) + 5);
1651 strcat (strcpy (exename
, name
), ".exe");
1652 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, exename
,
1653 O_RDONLY
| O_BINARY
, &absolute_name
);
1658 make_cleanup (xfree
, name
);
1659 perror_with_name (name
);
1662 /* Free 1st new malloc'd copy, but keep the 2nd malloc'd copy in
1663 bfd. It'll be freed in free_objfile(). */
1665 name
= absolute_name
;
1667 sym_bfd
= bfd_fopen (name
, gnutarget
, FOPEN_RB
, desc
);
1671 make_cleanup (xfree
, name
);
1672 error (_("`%s': can't open to read symbols: %s."), name
,
1673 bfd_errmsg (bfd_get_error ()));
1675 bfd_set_cacheable (sym_bfd
, 1);
1677 if (!bfd_check_format (sym_bfd
, bfd_object
))
1679 /* FIXME: should be checking for errors from bfd_close (for one
1680 thing, on error it does not free all the storage associated
1682 bfd_close (sym_bfd
); /* This also closes desc. */
1683 make_cleanup (xfree
, name
);
1684 error (_("`%s': can't read symbols: %s."), name
,
1685 bfd_errmsg (bfd_get_error ()));
1688 /* bfd_usrdata exists for applications and libbfd must not touch it. */
1689 gdb_assert (bfd_usrdata (sym_bfd
) == NULL
);
1694 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1695 the section was not found. */
1698 get_section_index (struct objfile
*objfile
, char *section_name
)
1700 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1708 /* Link SF into the global symtab_fns list. Called on startup by the
1709 _initialize routine in each object file format reader, to register
1710 information about each format the the reader is prepared to
1714 add_symtab_fns (const struct sym_fns
*sf
)
1716 VEC_safe_push (sym_fns_ptr
, symtab_fns
, sf
);
1719 /* Initialize OBJFILE to read symbols from its associated BFD. It
1720 either returns or calls error(). The result is an initialized
1721 struct sym_fns in the objfile structure, that contains cached
1722 information about the symbol file. */
1724 static const struct sym_fns
*
1725 find_sym_fns (bfd
*abfd
)
1727 const struct sym_fns
*sf
;
1728 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1731 if (our_flavour
== bfd_target_srec_flavour
1732 || our_flavour
== bfd_target_ihex_flavour
1733 || our_flavour
== bfd_target_tekhex_flavour
)
1734 return NULL
; /* No symbols. */
1736 for (i
= 0; VEC_iterate (sym_fns_ptr
, symtab_fns
, i
, sf
); ++i
)
1737 if (our_flavour
== sf
->sym_flavour
)
1740 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1741 bfd_get_target (abfd
));
1745 /* This function runs the load command of our current target. */
1748 load_command (char *arg
, int from_tty
)
1752 /* The user might be reloading because the binary has changed. Take
1753 this opportunity to check. */
1754 reopen_exec_file ();
1762 parg
= arg
= get_exec_file (1);
1764 /* Count how many \ " ' tab space there are in the name. */
1765 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1773 /* We need to quote this string so buildargv can pull it apart. */
1774 char *temp
= xmalloc (strlen (arg
) + count
+ 1 );
1778 make_cleanup (xfree
, temp
);
1781 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1783 strncpy (ptemp
, prev
, parg
- prev
);
1784 ptemp
+= parg
- prev
;
1788 strcpy (ptemp
, prev
);
1794 target_load (arg
, from_tty
);
1796 /* After re-loading the executable, we don't really know which
1797 overlays are mapped any more. */
1798 overlay_cache_invalid
= 1;
1801 /* This version of "load" should be usable for any target. Currently
1802 it is just used for remote targets, not inftarg.c or core files,
1803 on the theory that only in that case is it useful.
1805 Avoiding xmodem and the like seems like a win (a) because we don't have
1806 to worry about finding it, and (b) On VMS, fork() is very slow and so
1807 we don't want to run a subprocess. On the other hand, I'm not sure how
1808 performance compares. */
1810 static int validate_download
= 0;
1812 /* Callback service function for generic_load (bfd_map_over_sections). */
1815 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1817 bfd_size_type
*sum
= data
;
1819 *sum
+= bfd_get_section_size (asec
);
1822 /* Opaque data for load_section_callback. */
1823 struct load_section_data
{
1824 unsigned long load_offset
;
1825 struct load_progress_data
*progress_data
;
1826 VEC(memory_write_request_s
) *requests
;
1829 /* Opaque data for load_progress. */
1830 struct load_progress_data
{
1831 /* Cumulative data. */
1832 unsigned long write_count
;
1833 unsigned long data_count
;
1834 bfd_size_type total_size
;
1837 /* Opaque data for load_progress for a single section. */
1838 struct load_progress_section_data
{
1839 struct load_progress_data
*cumulative
;
1841 /* Per-section data. */
1842 const char *section_name
;
1843 ULONGEST section_sent
;
1844 ULONGEST section_size
;
1849 /* Target write callback routine for progress reporting. */
1852 load_progress (ULONGEST bytes
, void *untyped_arg
)
1854 struct load_progress_section_data
*args
= untyped_arg
;
1855 struct load_progress_data
*totals
;
1858 /* Writing padding data. No easy way to get at the cumulative
1859 stats, so just ignore this. */
1862 totals
= args
->cumulative
;
1864 if (bytes
== 0 && args
->section_sent
== 0)
1866 /* The write is just starting. Let the user know we've started
1868 ui_out_message (uiout
, 0, "Loading section %s, size %s lma %s\n",
1869 args
->section_name
, hex_string (args
->section_size
),
1870 paddress (target_gdbarch
, args
->lma
));
1874 if (validate_download
)
1876 /* Broken memories and broken monitors manifest themselves here
1877 when bring new computers to life. This doubles already slow
1879 /* NOTE: cagney/1999-10-18: A more efficient implementation
1880 might add a verify_memory() method to the target vector and
1881 then use that. remote.c could implement that method using
1882 the ``qCRC'' packet. */
1883 gdb_byte
*check
= xmalloc (bytes
);
1884 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
1886 if (target_read_memory (args
->lma
, check
, bytes
) != 0)
1887 error (_("Download verify read failed at %s"),
1888 paddress (target_gdbarch
, args
->lma
));
1889 if (memcmp (args
->buffer
, check
, bytes
) != 0)
1890 error (_("Download verify compare failed at %s"),
1891 paddress (target_gdbarch
, args
->lma
));
1892 do_cleanups (verify_cleanups
);
1894 totals
->data_count
+= bytes
;
1896 args
->buffer
+= bytes
;
1897 totals
->write_count
+= 1;
1898 args
->section_sent
+= bytes
;
1900 || (deprecated_ui_load_progress_hook
!= NULL
1901 && deprecated_ui_load_progress_hook (args
->section_name
,
1902 args
->section_sent
)))
1903 error (_("Canceled the download"));
1905 if (deprecated_show_load_progress
!= NULL
)
1906 deprecated_show_load_progress (args
->section_name
,
1910 totals
->total_size
);
1913 /* Callback service function for generic_load (bfd_map_over_sections). */
1916 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1918 struct memory_write_request
*new_request
;
1919 struct load_section_data
*args
= data
;
1920 struct load_progress_section_data
*section_data
;
1921 bfd_size_type size
= bfd_get_section_size (asec
);
1923 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1925 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
1931 new_request
= VEC_safe_push (memory_write_request_s
,
1932 args
->requests
, NULL
);
1933 memset (new_request
, 0, sizeof (struct memory_write_request
));
1934 section_data
= xcalloc (1, sizeof (struct load_progress_section_data
));
1935 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1936 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size
1938 new_request
->data
= xmalloc (size
);
1939 new_request
->baton
= section_data
;
1941 buffer
= new_request
->data
;
1943 section_data
->cumulative
= args
->progress_data
;
1944 section_data
->section_name
= sect_name
;
1945 section_data
->section_size
= size
;
1946 section_data
->lma
= new_request
->begin
;
1947 section_data
->buffer
= buffer
;
1949 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1952 /* Clean up an entire memory request vector, including load
1953 data and progress records. */
1956 clear_memory_write_data (void *arg
)
1958 VEC(memory_write_request_s
) **vec_p
= arg
;
1959 VEC(memory_write_request_s
) *vec
= *vec_p
;
1961 struct memory_write_request
*mr
;
1963 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
1968 VEC_free (memory_write_request_s
, vec
);
1972 generic_load (char *args
, int from_tty
)
1975 struct timeval start_time
, end_time
;
1977 struct cleanup
*old_cleanups
= make_cleanup (null_cleanup
, 0);
1978 struct load_section_data cbdata
;
1979 struct load_progress_data total_progress
;
1984 memset (&cbdata
, 0, sizeof (cbdata
));
1985 memset (&total_progress
, 0, sizeof (total_progress
));
1986 cbdata
.progress_data
= &total_progress
;
1988 make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
1991 error_no_arg (_("file to load"));
1993 argv
= gdb_buildargv (args
);
1994 make_cleanup_freeargv (argv
);
1996 filename
= tilde_expand (argv
[0]);
1997 make_cleanup (xfree
, filename
);
1999 if (argv
[1] != NULL
)
2003 cbdata
.load_offset
= strtoul (argv
[1], &endptr
, 0);
2005 /* If the last word was not a valid number then
2006 treat it as a file name with spaces in. */
2007 if (argv
[1] == endptr
)
2008 error (_("Invalid download offset:%s."), argv
[1]);
2010 if (argv
[2] != NULL
)
2011 error (_("Too many parameters."));
2014 /* Open the file for loading. */
2015 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
2016 if (loadfile_bfd
== NULL
)
2018 perror_with_name (filename
);
2022 /* FIXME: should be checking for errors from bfd_close (for one thing,
2023 on error it does not free all the storage associated with the
2025 make_cleanup_bfd_close (loadfile_bfd
);
2027 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
2029 error (_("\"%s\" is not an object file: %s"), filename
,
2030 bfd_errmsg (bfd_get_error ()));
2033 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
2034 (void *) &total_progress
.total_size
);
2036 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
2038 gettimeofday (&start_time
, NULL
);
2040 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2041 load_progress
) != 0)
2042 error (_("Load failed"));
2044 gettimeofday (&end_time
, NULL
);
2046 entry
= bfd_get_start_address (loadfile_bfd
);
2047 ui_out_text (uiout
, "Start address ");
2048 ui_out_field_fmt (uiout
, "address", "%s", paddress (target_gdbarch
, entry
));
2049 ui_out_text (uiout
, ", load size ");
2050 ui_out_field_fmt (uiout
, "load-size", "%lu", total_progress
.data_count
);
2051 ui_out_text (uiout
, "\n");
2052 /* We were doing this in remote-mips.c, I suspect it is right
2053 for other targets too. */
2054 regcache_write_pc (get_current_regcache (), entry
);
2056 /* Reset breakpoints, now that we have changed the load image. For
2057 instance, breakpoints may have been set (or reset, by
2058 post_create_inferior) while connected to the target but before we
2059 loaded the program. In that case, the prologue analyzer could
2060 have read instructions from the target to find the right
2061 breakpoint locations. Loading has changed the contents of that
2064 breakpoint_re_set ();
2066 /* FIXME: are we supposed to call symbol_file_add or not? According
2067 to a comment from remote-mips.c (where a call to symbol_file_add
2068 was commented out), making the call confuses GDB if more than one
2069 file is loaded in. Some targets do (e.g., remote-vx.c) but
2070 others don't (or didn't - perhaps they have all been deleted). */
2072 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2073 total_progress
.write_count
,
2074 &start_time
, &end_time
);
2076 do_cleanups (old_cleanups
);
2079 /* Report how fast the transfer went. */
2081 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
2082 replaced by print_transfer_performance (with a very different
2083 function signature). */
2086 report_transfer_performance (unsigned long data_count
, time_t start_time
,
2089 struct timeval start
, end
;
2091 start
.tv_sec
= start_time
;
2093 end
.tv_sec
= end_time
;
2096 print_transfer_performance (gdb_stdout
, data_count
, 0, &start
, &end
);
2100 print_transfer_performance (struct ui_file
*stream
,
2101 unsigned long data_count
,
2102 unsigned long write_count
,
2103 const struct timeval
*start_time
,
2104 const struct timeval
*end_time
)
2106 ULONGEST time_count
;
2108 /* Compute the elapsed time in milliseconds, as a tradeoff between
2109 accuracy and overflow. */
2110 time_count
= (end_time
->tv_sec
- start_time
->tv_sec
) * 1000;
2111 time_count
+= (end_time
->tv_usec
- start_time
->tv_usec
) / 1000;
2113 ui_out_text (uiout
, "Transfer rate: ");
2116 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / time_count
;
2118 if (ui_out_is_mi_like_p (uiout
))
2120 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
* 8);
2121 ui_out_text (uiout
, " bits/sec");
2123 else if (rate
< 1024)
2125 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
);
2126 ui_out_text (uiout
, " bytes/sec");
2130 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
/ 1024);
2131 ui_out_text (uiout
, " KB/sec");
2136 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
2137 ui_out_text (uiout
, " bits in <1 sec");
2139 if (write_count
> 0)
2141 ui_out_text (uiout
, ", ");
2142 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
2143 ui_out_text (uiout
, " bytes/write");
2145 ui_out_text (uiout
, ".\n");
2148 /* This function allows the addition of incrementally linked object files.
2149 It does not modify any state in the target, only in the debugger. */
2150 /* Note: ezannoni 2000-04-13 This function/command used to have a
2151 special case syntax for the rombug target (Rombug is the boot
2152 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2153 rombug case, the user doesn't need to supply a text address,
2154 instead a call to target_link() (in target.c) would supply the
2155 value to use. We are now discontinuing this type of ad hoc syntax. */
2158 add_symbol_file_command (char *args
, int from_tty
)
2160 struct gdbarch
*gdbarch
= get_current_arch ();
2161 char *filename
= NULL
;
2162 int flags
= OBJF_USERLOADED
;
2164 int section_index
= 0;
2168 int expecting_sec_name
= 0;
2169 int expecting_sec_addr
= 0;
2178 struct section_addr_info
*section_addrs
;
2179 struct sect_opt
*sect_opts
= NULL
;
2180 size_t num_sect_opts
= 0;
2181 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2184 sect_opts
= (struct sect_opt
*) xmalloc (num_sect_opts
2185 * sizeof (struct sect_opt
));
2190 error (_("add-symbol-file takes a file name and an address"));
2192 argv
= gdb_buildargv (args
);
2193 make_cleanup_freeargv (argv
);
2195 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2197 /* Process the argument. */
2200 /* The first argument is the file name. */
2201 filename
= tilde_expand (arg
);
2202 make_cleanup (xfree
, filename
);
2207 /* The second argument is always the text address at which
2208 to load the program. */
2209 sect_opts
[section_index
].name
= ".text";
2210 sect_opts
[section_index
].value
= arg
;
2211 if (++section_index
>= num_sect_opts
)
2214 sect_opts
= ((struct sect_opt
*)
2215 xrealloc (sect_opts
,
2217 * sizeof (struct sect_opt
)));
2222 /* It's an option (starting with '-') or it's an argument
2227 if (strcmp (arg
, "-readnow") == 0)
2228 flags
|= OBJF_READNOW
;
2229 else if (strcmp (arg
, "-s") == 0)
2231 expecting_sec_name
= 1;
2232 expecting_sec_addr
= 1;
2237 if (expecting_sec_name
)
2239 sect_opts
[section_index
].name
= arg
;
2240 expecting_sec_name
= 0;
2243 if (expecting_sec_addr
)
2245 sect_opts
[section_index
].value
= arg
;
2246 expecting_sec_addr
= 0;
2247 if (++section_index
>= num_sect_opts
)
2250 sect_opts
= ((struct sect_opt
*)
2251 xrealloc (sect_opts
,
2253 * sizeof (struct sect_opt
)));
2257 error (_("USAGE: add-symbol-file <filename> <textaddress>"
2258 " [-mapped] [-readnow] [-s <secname> <addr>]*"));
2263 /* This command takes at least two arguments. The first one is a
2264 filename, and the second is the address where this file has been
2265 loaded. Abort now if this address hasn't been provided by the
2267 if (section_index
< 1)
2268 error (_("The address where %s has been loaded is missing"), filename
);
2270 /* Print the prompt for the query below. And save the arguments into
2271 a sect_addr_info structure to be passed around to other
2272 functions. We have to split this up into separate print
2273 statements because hex_string returns a local static
2276 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename
);
2277 section_addrs
= alloc_section_addr_info (section_index
);
2278 make_cleanup (xfree
, section_addrs
);
2279 for (i
= 0; i
< section_index
; i
++)
2282 char *val
= sect_opts
[i
].value
;
2283 char *sec
= sect_opts
[i
].name
;
2285 addr
= parse_and_eval_address (val
);
2287 /* Here we store the section offsets in the order they were
2288 entered on the command line. */
2289 section_addrs
->other
[sec_num
].name
= sec
;
2290 section_addrs
->other
[sec_num
].addr
= addr
;
2291 printf_unfiltered ("\t%s_addr = %s\n", sec
,
2292 paddress (gdbarch
, addr
));
2295 /* The object's sections are initialized when a
2296 call is made to build_objfile_section_table (objfile).
2297 This happens in reread_symbols.
2298 At this point, we don't know what file type this is,
2299 so we can't determine what section names are valid. */
2302 if (from_tty
&& (!query ("%s", "")))
2303 error (_("Not confirmed."));
2305 symbol_file_add (filename
, from_tty
? SYMFILE_VERBOSE
: 0,
2306 section_addrs
, flags
);
2308 /* Getting new symbols may change our opinion about what is
2310 reinit_frame_cache ();
2311 do_cleanups (my_cleanups
);
2315 /* Re-read symbols if a symbol-file has changed. */
2317 reread_symbols (void)
2319 struct objfile
*objfile
;
2322 struct stat new_statbuf
;
2325 /* With the addition of shared libraries, this should be modified,
2326 the load time should be saved in the partial symbol tables, since
2327 different tables may come from different source files. FIXME.
2328 This routine should then walk down each partial symbol table
2329 and see if the symbol table that it originates from has been changed. */
2331 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2333 /* solib-sunos.c creates one objfile with obfd. */
2334 if (objfile
->obfd
== NULL
)
2337 /* Separate debug objfiles are handled in the main objfile. */
2338 if (objfile
->separate_debug_objfile_backlink
)
2341 /* If this object is from an archive (what you usually create with
2342 `ar', often called a `static library' on most systems, though
2343 a `shared library' on AIX is also an archive), then you should
2344 stat on the archive name, not member name. */
2345 if (objfile
->obfd
->my_archive
)
2346 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2348 res
= stat (objfile
->name
, &new_statbuf
);
2351 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2352 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2356 new_modtime
= new_statbuf
.st_mtime
;
2357 if (new_modtime
!= objfile
->mtime
)
2359 struct cleanup
*old_cleanups
;
2360 struct section_offsets
*offsets
;
2362 char *obfd_filename
;
2364 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2367 /* There are various functions like symbol_file_add,
2368 symfile_bfd_open, syms_from_objfile, etc., which might
2369 appear to do what we want. But they have various other
2370 effects which we *don't* want. So we just do stuff
2371 ourselves. We don't worry about mapped files (for one thing,
2372 any mapped file will be out of date). */
2374 /* If we get an error, blow away this objfile (not sure if
2375 that is the correct response for things like shared
2377 old_cleanups
= make_cleanup_free_objfile (objfile
);
2378 /* We need to do this whenever any symbols go away. */
2379 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2381 if (exec_bfd
!= NULL
&& strcmp (bfd_get_filename (objfile
->obfd
),
2382 bfd_get_filename (exec_bfd
)) == 0)
2384 /* Reload EXEC_BFD without asking anything. */
2386 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2389 /* Clean up any state BFD has sitting around. We don't need
2390 to close the descriptor but BFD lacks a way of closing the
2391 BFD without closing the descriptor. */
2392 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2393 if (!bfd_close (objfile
->obfd
))
2394 error (_("Can't close BFD for %s: %s"), objfile
->name
,
2395 bfd_errmsg (bfd_get_error ()));
2396 objfile
->obfd
= bfd_open_maybe_remote (obfd_filename
);
2397 if (objfile
->obfd
== NULL
)
2398 error (_("Can't open %s to read symbols."), objfile
->name
);
2400 objfile
->obfd
= gdb_bfd_ref (objfile
->obfd
);
2401 /* bfd_openr sets cacheable to true, which is what we want. */
2402 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2403 error (_("Can't read symbols from %s: %s."), objfile
->name
,
2404 bfd_errmsg (bfd_get_error ()));
2406 /* Save the offsets, we will nuke them with the rest of the
2408 num_offsets
= objfile
->num_sections
;
2409 offsets
= ((struct section_offsets
*)
2410 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2411 memcpy (offsets
, objfile
->section_offsets
,
2412 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2414 /* Remove any references to this objfile in the global
2416 preserve_values (objfile
);
2418 /* Nuke all the state that we will re-read. Much of the following
2419 code which sets things to NULL really is necessary to tell
2420 other parts of GDB that there is nothing currently there.
2422 Try to keep the freeing order compatible with free_objfile. */
2424 if (objfile
->sf
!= NULL
)
2426 (*objfile
->sf
->sym_finish
) (objfile
);
2429 clear_objfile_data (objfile
);
2431 /* Free the separate debug objfiles. It will be
2432 automatically recreated by sym_read. */
2433 free_objfile_separate_debug (objfile
);
2435 /* FIXME: Do we have to free a whole linked list, or is this
2437 if (objfile
->global_psymbols
.list
)
2438 xfree (objfile
->global_psymbols
.list
);
2439 memset (&objfile
->global_psymbols
, 0,
2440 sizeof (objfile
->global_psymbols
));
2441 if (objfile
->static_psymbols
.list
)
2442 xfree (objfile
->static_psymbols
.list
);
2443 memset (&objfile
->static_psymbols
, 0,
2444 sizeof (objfile
->static_psymbols
));
2446 /* Free the obstacks for non-reusable objfiles. */
2447 psymbol_bcache_free (objfile
->psymbol_cache
);
2448 objfile
->psymbol_cache
= psymbol_bcache_init ();
2449 bcache_xfree (objfile
->macro_cache
);
2450 objfile
->macro_cache
= bcache_xmalloc (NULL
, NULL
);
2451 bcache_xfree (objfile
->filename_cache
);
2452 objfile
->filename_cache
= bcache_xmalloc (NULL
,NULL
);
2453 if (objfile
->demangled_names_hash
!= NULL
)
2455 htab_delete (objfile
->demangled_names_hash
);
2456 objfile
->demangled_names_hash
= NULL
;
2458 obstack_free (&objfile
->objfile_obstack
, 0);
2459 objfile
->sections
= NULL
;
2460 objfile
->symtabs
= NULL
;
2461 objfile
->psymtabs
= NULL
;
2462 objfile
->psymtabs_addrmap
= NULL
;
2463 objfile
->free_psymtabs
= NULL
;
2464 objfile
->cp_namespace_symtab
= NULL
;
2465 objfile
->template_symbols
= NULL
;
2466 objfile
->msymbols
= NULL
;
2467 objfile
->deprecated_sym_private
= NULL
;
2468 objfile
->minimal_symbol_count
= 0;
2469 memset (&objfile
->msymbol_hash
, 0,
2470 sizeof (objfile
->msymbol_hash
));
2471 memset (&objfile
->msymbol_demangled_hash
, 0,
2472 sizeof (objfile
->msymbol_demangled_hash
));
2474 objfile
->psymbol_cache
= psymbol_bcache_init ();
2475 objfile
->macro_cache
= bcache_xmalloc (NULL
, NULL
);
2476 objfile
->filename_cache
= bcache_xmalloc (NULL
, NULL
);
2477 /* obstack_init also initializes the obstack so it is
2478 empty. We could use obstack_specify_allocation but
2479 gdb_obstack.h specifies the alloc/dealloc
2481 obstack_init (&objfile
->objfile_obstack
);
2482 if (build_objfile_section_table (objfile
))
2484 error (_("Can't find the file sections in `%s': %s"),
2485 objfile
->name
, bfd_errmsg (bfd_get_error ()));
2487 terminate_minimal_symbol_table (objfile
);
2489 /* We use the same section offsets as from last time. I'm not
2490 sure whether that is always correct for shared libraries. */
2491 objfile
->section_offsets
= (struct section_offsets
*)
2492 obstack_alloc (&objfile
->objfile_obstack
,
2493 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2494 memcpy (objfile
->section_offsets
, offsets
,
2495 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2496 objfile
->num_sections
= num_offsets
;
2498 /* What the hell is sym_new_init for, anyway? The concept of
2499 distinguishing between the main file and additional files
2500 in this way seems rather dubious. */
2501 if (objfile
== symfile_objfile
)
2503 (*objfile
->sf
->sym_new_init
) (objfile
);
2506 (*objfile
->sf
->sym_init
) (objfile
);
2507 clear_complaints (&symfile_complaints
, 1, 1);
2508 /* Do not set flags as this is safe and we don't want to be
2510 (*objfile
->sf
->sym_read
) (objfile
, 0);
2511 if (!objfile_has_symbols (objfile
))
2514 printf_unfiltered (_("(no debugging symbols found)\n"));
2518 /* We're done reading the symbol file; finish off complaints. */
2519 clear_complaints (&symfile_complaints
, 0, 1);
2521 /* Getting new symbols may change our opinion about what is
2524 reinit_frame_cache ();
2526 /* Discard cleanups as symbol reading was successful. */
2527 discard_cleanups (old_cleanups
);
2529 /* If the mtime has changed between the time we set new_modtime
2530 and now, we *want* this to be out of date, so don't call stat
2532 objfile
->mtime
= new_modtime
;
2534 init_entry_point_info (objfile
);
2540 /* Notify objfiles that we've modified objfile sections. */
2541 objfiles_changed ();
2543 clear_symtab_users (0);
2544 /* At least one objfile has changed, so we can consider that
2545 the executable we're debugging has changed too. */
2546 observer_notify_executable_changed ();
2559 static filename_language
*filename_language_table
;
2560 static int fl_table_size
, fl_table_next
;
2563 add_filename_language (char *ext
, enum language lang
)
2565 if (fl_table_next
>= fl_table_size
)
2567 fl_table_size
+= 10;
2568 filename_language_table
=
2569 xrealloc (filename_language_table
,
2570 fl_table_size
* sizeof (*filename_language_table
));
2573 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2574 filename_language_table
[fl_table_next
].lang
= lang
;
2578 static char *ext_args
;
2580 show_ext_args (struct ui_file
*file
, int from_tty
,
2581 struct cmd_list_element
*c
, const char *value
)
2583 fprintf_filtered (file
,
2584 _("Mapping between filename extension "
2585 "and source language is \"%s\".\n"),
2590 set_ext_lang_command (char *args
, int from_tty
, struct cmd_list_element
*e
)
2593 char *cp
= ext_args
;
2596 /* First arg is filename extension, starting with '.' */
2598 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2600 /* Find end of first arg. */
2601 while (*cp
&& !isspace (*cp
))
2605 error (_("'%s': two arguments required -- "
2606 "filename extension and language"),
2609 /* Null-terminate first arg. */
2612 /* Find beginning of second arg, which should be a source language. */
2613 while (*cp
&& isspace (*cp
))
2617 error (_("'%s': two arguments required -- "
2618 "filename extension and language"),
2621 /* Lookup the language from among those we know. */
2622 lang
= language_enum (cp
);
2624 /* Now lookup the filename extension: do we already know it? */
2625 for (i
= 0; i
< fl_table_next
; i
++)
2626 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2629 if (i
>= fl_table_next
)
2631 /* New file extension. */
2632 add_filename_language (ext_args
, lang
);
2636 /* Redefining a previously known filename extension. */
2639 /* query ("Really make files of type %s '%s'?", */
2640 /* ext_args, language_str (lang)); */
2642 xfree (filename_language_table
[i
].ext
);
2643 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2644 filename_language_table
[i
].lang
= lang
;
2649 info_ext_lang_command (char *args
, int from_tty
)
2653 printf_filtered (_("Filename extensions and the languages they represent:"));
2654 printf_filtered ("\n\n");
2655 for (i
= 0; i
< fl_table_next
; i
++)
2656 printf_filtered ("\t%s\t- %s\n",
2657 filename_language_table
[i
].ext
,
2658 language_str (filename_language_table
[i
].lang
));
2662 init_filename_language_table (void)
2664 if (fl_table_size
== 0) /* Protect against repetition. */
2668 filename_language_table
=
2669 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
2670 add_filename_language (".c", language_c
);
2671 add_filename_language (".d", language_d
);
2672 add_filename_language (".C", language_cplus
);
2673 add_filename_language (".cc", language_cplus
);
2674 add_filename_language (".cp", language_cplus
);
2675 add_filename_language (".cpp", language_cplus
);
2676 add_filename_language (".cxx", language_cplus
);
2677 add_filename_language (".c++", language_cplus
);
2678 add_filename_language (".java", language_java
);
2679 add_filename_language (".class", language_java
);
2680 add_filename_language (".m", language_objc
);
2681 add_filename_language (".f", language_fortran
);
2682 add_filename_language (".F", language_fortran
);
2683 add_filename_language (".for", language_fortran
);
2684 add_filename_language (".FOR", language_fortran
);
2685 add_filename_language (".ftn", language_fortran
);
2686 add_filename_language (".FTN", language_fortran
);
2687 add_filename_language (".fpp", language_fortran
);
2688 add_filename_language (".FPP", language_fortran
);
2689 add_filename_language (".f90", language_fortran
);
2690 add_filename_language (".F90", language_fortran
);
2691 add_filename_language (".f95", language_fortran
);
2692 add_filename_language (".F95", language_fortran
);
2693 add_filename_language (".f03", language_fortran
);
2694 add_filename_language (".F03", language_fortran
);
2695 add_filename_language (".f08", language_fortran
);
2696 add_filename_language (".F08", language_fortran
);
2697 add_filename_language (".s", language_asm
);
2698 add_filename_language (".sx", language_asm
);
2699 add_filename_language (".S", language_asm
);
2700 add_filename_language (".pas", language_pascal
);
2701 add_filename_language (".p", language_pascal
);
2702 add_filename_language (".pp", language_pascal
);
2703 add_filename_language (".adb", language_ada
);
2704 add_filename_language (".ads", language_ada
);
2705 add_filename_language (".a", language_ada
);
2706 add_filename_language (".ada", language_ada
);
2707 add_filename_language (".dg", language_ada
);
2712 deduce_language_from_filename (const char *filename
)
2717 if (filename
!= NULL
)
2718 if ((cp
= strrchr (filename
, '.')) != NULL
)
2719 for (i
= 0; i
< fl_table_next
; i
++)
2720 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2721 return filename_language_table
[i
].lang
;
2723 return language_unknown
;
2728 Allocate and partly initialize a new symbol table. Return a pointer
2729 to it. error() if no space.
2731 Caller must set these fields:
2740 allocate_symtab (const char *filename
, struct objfile
*objfile
)
2742 struct symtab
*symtab
;
2744 symtab
= (struct symtab
*)
2745 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symtab
));
2746 memset (symtab
, 0, sizeof (*symtab
));
2747 symtab
->filename
= (char *) bcache (filename
, strlen (filename
) + 1,
2748 objfile
->filename_cache
);
2749 symtab
->fullname
= NULL
;
2750 symtab
->language
= deduce_language_from_filename (filename
);
2751 symtab
->debugformat
= "unknown";
2753 /* Hook it to the objfile it comes from. */
2755 symtab
->objfile
= objfile
;
2756 symtab
->next
= objfile
->symtabs
;
2757 objfile
->symtabs
= symtab
;
2763 /* Reset all data structures in gdb which may contain references to symbol
2764 table data. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
2767 clear_symtab_users (int add_flags
)
2769 /* Someday, we should do better than this, by only blowing away
2770 the things that really need to be blown. */
2772 /* Clear the "current" symtab first, because it is no longer valid.
2773 breakpoint_re_set may try to access the current symtab. */
2774 clear_current_source_symtab_and_line ();
2777 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
2778 breakpoint_re_set ();
2779 set_default_breakpoint (0, NULL
, 0, 0, 0);
2780 clear_pc_function_cache ();
2781 observer_notify_new_objfile (NULL
);
2783 /* Clear globals which might have pointed into a removed objfile.
2784 FIXME: It's not clear which of these are supposed to persist
2785 between expressions and which ought to be reset each time. */
2786 expression_context_block
= NULL
;
2787 innermost_block
= NULL
;
2789 /* Varobj may refer to old symbols, perform a cleanup. */
2790 varobj_invalidate ();
2795 clear_symtab_users_cleanup (void *ignore
)
2797 clear_symtab_users (0);
2801 The following code implements an abstraction for debugging overlay sections.
2803 The target model is as follows:
2804 1) The gnu linker will permit multiple sections to be mapped into the
2805 same VMA, each with its own unique LMA (or load address).
2806 2) It is assumed that some runtime mechanism exists for mapping the
2807 sections, one by one, from the load address into the VMA address.
2808 3) This code provides a mechanism for gdb to keep track of which
2809 sections should be considered to be mapped from the VMA to the LMA.
2810 This information is used for symbol lookup, and memory read/write.
2811 For instance, if a section has been mapped then its contents
2812 should be read from the VMA, otherwise from the LMA.
2814 Two levels of debugger support for overlays are available. One is
2815 "manual", in which the debugger relies on the user to tell it which
2816 overlays are currently mapped. This level of support is
2817 implemented entirely in the core debugger, and the information about
2818 whether a section is mapped is kept in the objfile->obj_section table.
2820 The second level of support is "automatic", and is only available if
2821 the target-specific code provides functionality to read the target's
2822 overlay mapping table, and translate its contents for the debugger
2823 (by updating the mapped state information in the obj_section tables).
2825 The interface is as follows:
2827 overlay map <name> -- tell gdb to consider this section mapped
2828 overlay unmap <name> -- tell gdb to consider this section unmapped
2829 overlay list -- list the sections that GDB thinks are mapped
2830 overlay read-target -- get the target's state of what's mapped
2831 overlay off/manual/auto -- set overlay debugging state
2832 Functional interface:
2833 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2834 section, return that section.
2835 find_pc_overlay(pc): find any overlay section that contains
2836 the pc, either in its VMA or its LMA
2837 section_is_mapped(sect): true if overlay is marked as mapped
2838 section_is_overlay(sect): true if section's VMA != LMA
2839 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2840 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2841 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2842 overlay_mapped_address(...): map an address from section's LMA to VMA
2843 overlay_unmapped_address(...): map an address from section's VMA to LMA
2844 symbol_overlayed_address(...): Return a "current" address for symbol:
2845 either in VMA or LMA depending on whether
2846 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
3036 if (!section_is_overlay (section
))
3038 /* If the symbol's section is mapped, just return its address. */
3039 if (section_is_mapped (section
))
3042 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3043 * then return its LOADED address rather than its vma address!!
3045 return overlay_unmapped_address (address
, section
);
3050 /* Function: find_pc_overlay (PC)
3051 Return the best-match overlay section for PC:
3052 If PC matches a mapped overlay section's VMA, return that section.
3053 Else if PC matches an unmapped section's VMA, return that section.
3054 Else if PC matches an unmapped section's LMA, return that section. */
3056 struct obj_section
*
3057 find_pc_overlay (CORE_ADDR pc
)
3059 struct objfile
*objfile
;
3060 struct obj_section
*osect
, *best_match
= NULL
;
3062 if (overlay_debugging
)
3063 ALL_OBJSECTIONS (objfile
, osect
)
3064 if (section_is_overlay (osect
))
3066 if (pc_in_mapped_range (pc
, osect
))
3068 if (section_is_mapped (osect
))
3073 else if (pc_in_unmapped_range (pc
, osect
))
3079 /* Function: find_pc_mapped_section (PC)
3080 If PC falls into the VMA address range of an overlay section that is
3081 currently marked as MAPPED, return that section. Else return NULL. */
3083 struct obj_section
*
3084 find_pc_mapped_section (CORE_ADDR pc
)
3086 struct objfile
*objfile
;
3087 struct obj_section
*osect
;
3089 if (overlay_debugging
)
3090 ALL_OBJSECTIONS (objfile
, osect
)
3091 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3097 /* Function: list_overlays_command
3098 Print a list of mapped sections and their PC ranges. */
3101 list_overlays_command (char *args
, int from_tty
)
3104 struct objfile
*objfile
;
3105 struct obj_section
*osect
;
3107 if (overlay_debugging
)
3108 ALL_OBJSECTIONS (objfile
, osect
)
3109 if (section_is_mapped (osect
))
3111 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3116 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3117 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3118 size
= bfd_get_section_size (osect
->the_bfd_section
);
3119 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3121 printf_filtered ("Section %s, loaded at ", name
);
3122 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3123 puts_filtered (" - ");
3124 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3125 printf_filtered (", mapped at ");
3126 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3127 puts_filtered (" - ");
3128 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3129 puts_filtered ("\n");
3134 printf_filtered (_("No sections are mapped.\n"));
3137 /* Function: map_overlay_command
3138 Mark the named section as mapped (ie. residing at its VMA address). */
3141 map_overlay_command (char *args
, int from_tty
)
3143 struct objfile
*objfile
, *objfile2
;
3144 struct obj_section
*sec
, *sec2
;
3146 if (!overlay_debugging
)
3147 error (_("Overlay debugging not enabled. Use "
3148 "either the 'overlay auto' or\n"
3149 "the 'overlay manual' command."));
3151 if (args
== 0 || *args
== 0)
3152 error (_("Argument required: name of an overlay section"));
3154 /* First, find a section matching the user supplied argument. */
3155 ALL_OBJSECTIONS (objfile
, sec
)
3156 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3158 /* Now, check to see if the section is an overlay. */
3159 if (!section_is_overlay (sec
))
3160 continue; /* not an overlay section */
3162 /* Mark the overlay as "mapped". */
3163 sec
->ovly_mapped
= 1;
3165 /* Next, make a pass and unmap any sections that are
3166 overlapped by this new section: */
3167 ALL_OBJSECTIONS (objfile2
, sec2
)
3168 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
, sec2
))
3171 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3172 bfd_section_name (objfile
->obfd
,
3173 sec2
->the_bfd_section
));
3174 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2. */
3178 error (_("No overlay section called %s"), args
);
3181 /* Function: unmap_overlay_command
3182 Mark the overlay section as unmapped
3183 (ie. resident in its LMA address range, rather than the VMA range). */
3186 unmap_overlay_command (char *args
, int from_tty
)
3188 struct objfile
*objfile
;
3189 struct obj_section
*sec
;
3191 if (!overlay_debugging
)
3192 error (_("Overlay debugging not enabled. "
3193 "Use either the 'overlay auto' or\n"
3194 "the 'overlay manual' command."));
3196 if (args
== 0 || *args
== 0)
3197 error (_("Argument required: name of an overlay section"));
3199 /* First, find a section matching the user supplied argument. */
3200 ALL_OBJSECTIONS (objfile
, sec
)
3201 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3203 if (!sec
->ovly_mapped
)
3204 error (_("Section %s is not mapped"), args
);
3205 sec
->ovly_mapped
= 0;
3208 error (_("No overlay section called %s"), args
);
3211 /* Function: overlay_auto_command
3212 A utility command to turn on overlay debugging.
3213 Possibly this should be done via a set/show command. */
3216 overlay_auto_command (char *args
, int from_tty
)
3218 overlay_debugging
= ovly_auto
;
3219 enable_overlay_breakpoints ();
3221 printf_unfiltered (_("Automatic overlay debugging enabled."));
3224 /* Function: overlay_manual_command
3225 A utility command to turn on overlay debugging.
3226 Possibly this should be done via a set/show command. */
3229 overlay_manual_command (char *args
, int from_tty
)
3231 overlay_debugging
= ovly_on
;
3232 disable_overlay_breakpoints ();
3234 printf_unfiltered (_("Overlay debugging enabled."));
3237 /* Function: overlay_off_command
3238 A utility command to turn on overlay debugging.
3239 Possibly this should be done via a set/show command. */
3242 overlay_off_command (char *args
, int from_tty
)
3244 overlay_debugging
= ovly_off
;
3245 disable_overlay_breakpoints ();
3247 printf_unfiltered (_("Overlay debugging disabled."));
3251 overlay_load_command (char *args
, int from_tty
)
3253 struct gdbarch
*gdbarch
= get_current_arch ();
3255 if (gdbarch_overlay_update_p (gdbarch
))
3256 gdbarch_overlay_update (gdbarch
, NULL
);
3258 error (_("This target does not know how to read its overlay state."));
3261 /* Function: overlay_command
3262 A place-holder for a mis-typed command. */
3264 /* Command list chain containing all defined "overlay" subcommands. */
3265 struct cmd_list_element
*overlaylist
;
3268 overlay_command (char *args
, int from_tty
)
3271 ("\"overlay\" must be followed by the name of an overlay command.\n");
3272 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3276 /* Target Overlays for the "Simplest" overlay manager:
3278 This is GDB's default target overlay layer. It works with the
3279 minimal overlay manager supplied as an example by Cygnus. The
3280 entry point is via a function pointer "gdbarch_overlay_update",
3281 so targets that use a different runtime overlay manager can
3282 substitute their own overlay_update function and take over the
3285 The overlay_update function pokes around in the target's data structures
3286 to see what overlays are mapped, and updates GDB's overlay mapping with
3289 In this simple implementation, the target data structures are as follows:
3290 unsigned _novlys; /# number of overlay sections #/
3291 unsigned _ovly_table[_novlys][4] = {
3292 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3293 {..., ..., ..., ...},
3295 unsigned _novly_regions; /# number of overlay regions #/
3296 unsigned _ovly_region_table[_novly_regions][3] = {
3297 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3300 These functions will attempt to update GDB's mappedness state in the
3301 symbol section table, based on the target's mappedness state.
3303 To do this, we keep a cached copy of the target's _ovly_table, and
3304 attempt to detect when the cached copy is invalidated. The main
3305 entry point is "simple_overlay_update(SECT), which looks up SECT in
3306 the cached table and re-reads only the entry for that section from
3307 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
3452 if (simple_overlay_update_1 (osect
))
3453 /* Found it! We're done. */
3456 /* Cached table no good: need to read the entire table anew.
3457 Or else we want all the sections, in which case it's actually
3458 more efficient to read the whole table in one block anyway. */
3460 if (! simple_read_overlay_table ())
3463 /* Now may as well update all sections, even if only one was requested. */
3464 ALL_OBJSECTIONS (objfile
, osect
)
3465 if (section_is_overlay (osect
))
3468 bfd
*obfd
= osect
->objfile
->obfd
;
3469 asection
*bsect
= osect
->the_bfd_section
;
3471 size
= bfd_get_section_size (bsect
);
3472 for (i
= 0; i
< cache_novlys
; i
++)
3473 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3474 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3475 /* && cache_ovly_table[i][SIZE] == size */ )
3476 { /* obj_section matches i'th entry in ovly_table. */
3477 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3478 break; /* finished with inner for loop: break out. */
3483 /* Set the output sections and output offsets for section SECTP in
3484 ABFD. The relocation code in BFD will read these offsets, so we
3485 need to be sure they're initialized. We map each section to itself,
3486 with no offset; this means that SECTP->vma will be honored. */
3489 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3491 sectp
->output_section
= sectp
;
3492 sectp
->output_offset
= 0;
3495 /* Default implementation for sym_relocate. */
3499 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3502 bfd
*abfd
= objfile
->obfd
;
3504 /* We're only interested in sections with relocation
3506 if ((sectp
->flags
& SEC_RELOC
) == 0)
3509 /* We will handle section offsets properly elsewhere, so relocate as if
3510 all sections begin at 0. */
3511 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3513 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3516 /* Relocate the contents of a debug section SECTP in ABFD. The
3517 contents are stored in BUF if it is non-NULL, or returned in a
3518 malloc'd buffer otherwise.
3520 For some platforms and debug info formats, shared libraries contain
3521 relocations against the debug sections (particularly for DWARF-2;
3522 one affected platform is PowerPC GNU/Linux, although it depends on
3523 the version of the linker in use). Also, ELF object files naturally
3524 have unresolved relocations for their debug sections. We need to apply
3525 the relocations in order to get the locations of symbols correct.
3526 Another example that may require relocation processing, is the
3527 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3531 symfile_relocate_debug_section (struct objfile
*objfile
,
3532 asection
*sectp
, bfd_byte
*buf
)
3534 gdb_assert (objfile
->sf
->sym_relocate
);
3536 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3539 struct symfile_segment_data
*
3540 get_symfile_segment_data (bfd
*abfd
)
3542 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3547 return sf
->sym_segments (abfd
);
3551 free_symfile_segment_data (struct symfile_segment_data
*data
)
3553 xfree (data
->segment_bases
);
3554 xfree (data
->segment_sizes
);
3555 xfree (data
->segment_info
);
3561 - DATA, containing segment addresses from the object file ABFD, and
3562 the mapping from ABFD's sections onto the segments that own them,
3564 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3565 segment addresses reported by the target,
3566 store the appropriate offsets for each section in OFFSETS.
3568 If there are fewer entries in SEGMENT_BASES than there are segments
3569 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3571 If there are more entries, then ignore the extra. The target may
3572 not be able to distinguish between an empty data segment and a
3573 missing data segment; a missing text segment is less plausible. */
3575 symfile_map_offsets_to_segments (bfd
*abfd
, struct symfile_segment_data
*data
,
3576 struct section_offsets
*offsets
,
3577 int num_segment_bases
,
3578 const CORE_ADDR
*segment_bases
)
3583 /* It doesn't make sense to call this function unless you have some
3584 segment base addresses. */
3585 gdb_assert (num_segment_bases
> 0);
3587 /* If we do not have segment mappings for the object file, we
3588 can not relocate it by segments. */
3589 gdb_assert (data
!= NULL
);
3590 gdb_assert (data
->num_segments
> 0);
3592 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3594 int which
= data
->segment_info
[i
];
3596 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
3598 /* Don't bother computing offsets for sections that aren't
3599 loaded as part of any segment. */
3603 /* Use the last SEGMENT_BASES entry as the address of any extra
3604 segments mentioned in DATA->segment_info. */
3605 if (which
> num_segment_bases
)
3606 which
= num_segment_bases
;
3608 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
3609 - data
->segment_bases
[which
- 1]);
3616 symfile_find_segment_sections (struct objfile
*objfile
)
3618 bfd
*abfd
= objfile
->obfd
;
3621 struct symfile_segment_data
*data
;
3623 data
= get_symfile_segment_data (objfile
->obfd
);
3627 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
3629 free_symfile_segment_data (data
);
3633 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3635 int which
= data
->segment_info
[i
];
3639 if (objfile
->sect_index_text
== -1)
3640 objfile
->sect_index_text
= sect
->index
;
3642 if (objfile
->sect_index_rodata
== -1)
3643 objfile
->sect_index_rodata
= sect
->index
;
3645 else if (which
== 2)
3647 if (objfile
->sect_index_data
== -1)
3648 objfile
->sect_index_data
= sect
->index
;
3650 if (objfile
->sect_index_bss
== -1)
3651 objfile
->sect_index_bss
= sect
->index
;
3655 free_symfile_segment_data (data
);
3659 _initialize_symfile (void)
3661 struct cmd_list_element
*c
;
3663 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3664 Load symbol table from executable file FILE.\n\
3665 The `file' command can also load symbol tables, as well as setting the file\n\
3666 to execute."), &cmdlist
);
3667 set_cmd_completer (c
, filename_completer
);
3669 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3670 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3671 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR>\
3672 ...]\nADDR is the starting address of the file's text.\n\
3673 The optional arguments are section-name section-address pairs and\n\
3674 should be specified if the data and bss segments are not contiguous\n\
3675 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3677 set_cmd_completer (c
, filename_completer
);
3679 c
= add_cmd ("load", class_files
, load_command
, _("\
3680 Dynamically load FILE into the running program, and record its symbols\n\
3681 for access from GDB.\n\
3682 A load OFFSET may also be given."), &cmdlist
);
3683 set_cmd_completer (c
, filename_completer
);
3685 add_setshow_boolean_cmd ("symbol-reloading", class_support
,
3686 &symbol_reloading
, _("\
3687 Set dynamic symbol table reloading multiple times in one run."), _("\
3688 Show dynamic symbol table reloading multiple times in one run."), NULL
,
3690 show_symbol_reloading
,
3691 &setlist
, &showlist
);
3693 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3694 _("Commands for debugging overlays."), &overlaylist
,
3695 "overlay ", 0, &cmdlist
);
3697 add_com_alias ("ovly", "overlay", class_alias
, 1);
3698 add_com_alias ("ov", "overlay", class_alias
, 1);
3700 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3701 _("Assert that an overlay section is mapped."), &overlaylist
);
3703 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3704 _("Assert that an overlay section is unmapped."), &overlaylist
);
3706 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3707 _("List mappings of overlay sections."), &overlaylist
);
3709 add_cmd ("manual", class_support
, overlay_manual_command
,
3710 _("Enable overlay debugging."), &overlaylist
);
3711 add_cmd ("off", class_support
, overlay_off_command
,
3712 _("Disable overlay debugging."), &overlaylist
);
3713 add_cmd ("auto", class_support
, overlay_auto_command
,
3714 _("Enable automatic overlay debugging."), &overlaylist
);
3715 add_cmd ("load-target", class_support
, overlay_load_command
,
3716 _("Read the overlay mapping state from the target."), &overlaylist
);
3718 /* Filename extension to source language lookup table: */
3719 init_filename_language_table ();
3720 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3722 Set mapping between filename extension and source language."), _("\
3723 Show mapping between filename extension and source language."), _("\
3724 Usage: set extension-language .foo bar"),
3725 set_ext_lang_command
,
3727 &setlist
, &showlist
);
3729 add_info ("extensions", info_ext_lang_command
,
3730 _("All filename extensions associated with a source language."));
3732 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3733 &debug_file_directory
, _("\
3734 Set the directories where separate debug symbols are searched for."), _("\
3735 Show the directories where separate debug symbols are searched for."), _("\
3736 Separate debug symbols are first searched for in the same\n\
3737 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3738 and lastly at the path of the directory of the binary with\n\
3739 each global debug-file-directory component prepended."),
3741 show_debug_file_directory
,
3742 &setlist
, &showlist
);