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"
61 #include <sys/types.h>
63 #include "gdb_string.h"
71 int (*deprecated_ui_load_progress_hook
) (const char *section
,
73 void (*deprecated_show_load_progress
) (const char *section
,
74 unsigned long section_sent
,
75 unsigned long section_size
,
76 unsigned long total_sent
,
77 unsigned long total_size
);
78 void (*deprecated_pre_add_symbol_hook
) (const char *);
79 void (*deprecated_post_add_symbol_hook
) (void);
81 static void clear_symtab_users_cleanup (void *ignore
);
83 /* Global variables owned by this file. */
84 int readnow_symbol_files
; /* Read full symbols immediately. */
86 /* External variables and functions referenced. */
88 extern void report_transfer_performance (unsigned long, time_t, time_t);
90 /* Functions this file defines. */
92 static void load_command (char *, int);
94 static void symbol_file_add_main_1 (char *args
, int from_tty
, int flags
);
96 static void add_symbol_file_command (char *, int);
98 bfd
*symfile_bfd_open (char *);
100 int get_section_index (struct objfile
*, char *);
102 static const struct sym_fns
*find_sym_fns (bfd
*);
104 static void decrement_reading_symtab (void *);
106 static void overlay_invalidate_all (void);
108 void list_overlays_command (char *, int);
110 void map_overlay_command (char *, int);
112 void unmap_overlay_command (char *, int);
114 static void overlay_auto_command (char *, int);
116 static void overlay_manual_command (char *, int);
118 static void overlay_off_command (char *, int);
120 static void overlay_load_command (char *, int);
122 static void overlay_command (char *, int);
124 static void simple_free_overlay_table (void);
126 static void read_target_long_array (CORE_ADDR
, unsigned int *, int, int,
129 static int simple_read_overlay_table (void);
131 static int simple_overlay_update_1 (struct obj_section
*);
133 static void add_filename_language (char *ext
, enum language lang
);
135 static void info_ext_lang_command (char *args
, int from_tty
);
137 static void init_filename_language_table (void);
139 static void symfile_find_segment_sections (struct objfile
*objfile
);
141 void _initialize_symfile (void);
143 /* List of all available sym_fns. On gdb startup, each object file reader
144 calls add_symtab_fns() to register information on each format it is
147 typedef const struct sym_fns
*sym_fns_ptr
;
148 DEF_VEC_P (sym_fns_ptr
);
150 static VEC (sym_fns_ptr
) *symtab_fns
= NULL
;
152 /* Flag for whether user will be reloading symbols multiple times.
153 Defaults to ON for VxWorks, otherwise OFF. */
155 #ifdef SYMBOL_RELOADING_DEFAULT
156 int symbol_reloading
= SYMBOL_RELOADING_DEFAULT
;
158 int symbol_reloading
= 0;
161 show_symbol_reloading (struct ui_file
*file
, int from_tty
,
162 struct cmd_list_element
*c
, const char *value
)
164 fprintf_filtered (file
, _("Dynamic symbol table reloading "
165 "multiple times in one run is %s.\n"),
169 /* If non-zero, shared library symbols will be added automatically
170 when the inferior is created, new libraries are loaded, or when
171 attaching to the inferior. This is almost always what users will
172 want to have happen; but for very large programs, the startup time
173 will be excessive, and so if this is a problem, the user can clear
174 this flag and then add the shared library symbols as needed. Note
175 that there is a potential for confusion, since if the shared
176 library symbols are not loaded, commands like "info fun" will *not*
177 report all the functions that are actually present. */
179 int auto_solib_add
= 1;
182 /* Make a null terminated copy of the string at PTR with SIZE characters in
183 the obstack pointed to by OBSTACKP . Returns the address of the copy.
184 Note that the string at PTR does not have to be null terminated, I.e. it
185 may be part of a larger string and we are only saving a substring. */
188 obsavestring (const char *ptr
, int size
, struct obstack
*obstackp
)
190 char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
191 /* Open-coded memcpy--saves function call time. These strings are usually
192 short. FIXME: Is this really still true with a compiler that can
195 const char *p1
= ptr
;
197 const char *end
= ptr
+ size
;
206 /* Concatenate NULL terminated variable argument list of `const char *'
207 strings; return the new string. Space is found in the OBSTACKP.
208 Argument list must be terminated by a sentinel expression `(char *)
212 obconcat (struct obstack
*obstackp
, ...)
216 va_start (ap
, obstackp
);
219 const char *s
= va_arg (ap
, const char *);
224 obstack_grow_str (obstackp
, s
);
227 obstack_1grow (obstackp
, 0);
229 return obstack_finish (obstackp
);
232 /* True if we are reading a symbol table. */
234 int currently_reading_symtab
= 0;
237 decrement_reading_symtab (void *dummy
)
239 currently_reading_symtab
--;
242 /* Increment currently_reading_symtab and return a cleanup that can be
243 used to decrement it. */
245 increment_reading_symtab (void)
247 ++currently_reading_symtab
;
248 return make_cleanup (decrement_reading_symtab
, NULL
);
251 /* Remember the lowest-addressed loadable section we've seen.
252 This function is called via bfd_map_over_sections.
254 In case of equal vmas, the section with the largest size becomes the
255 lowest-addressed loadable section.
257 If the vmas and sizes are equal, the last section is considered the
258 lowest-addressed loadable section. */
261 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
263 asection
**lowest
= (asection
**) obj
;
265 if (0 == (bfd_get_section_flags (abfd
, sect
) & (SEC_ALLOC
| SEC_LOAD
)))
268 *lowest
= sect
; /* First loadable section */
269 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
270 *lowest
= sect
; /* A lower loadable section */
271 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
272 && (bfd_section_size (abfd
, (*lowest
))
273 <= bfd_section_size (abfd
, sect
)))
277 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
279 struct section_addr_info
*
280 alloc_section_addr_info (size_t num_sections
)
282 struct section_addr_info
*sap
;
285 size
= (sizeof (struct section_addr_info
)
286 + sizeof (struct other_sections
) * (num_sections
- 1));
287 sap
= (struct section_addr_info
*) xmalloc (size
);
288 memset (sap
, 0, size
);
289 sap
->num_sections
= num_sections
;
294 /* Build (allocate and populate) a section_addr_info struct from
295 an existing section table. */
297 extern struct section_addr_info
*
298 build_section_addr_info_from_section_table (const struct target_section
*start
,
299 const struct target_section
*end
)
301 struct section_addr_info
*sap
;
302 const struct target_section
*stp
;
305 sap
= alloc_section_addr_info (end
- start
);
307 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
309 if (bfd_get_section_flags (stp
->bfd
,
310 stp
->the_bfd_section
) & (SEC_ALLOC
| SEC_LOAD
)
311 && oidx
< end
- start
)
313 sap
->other
[oidx
].addr
= stp
->addr
;
314 sap
->other
[oidx
].name
315 = xstrdup (bfd_section_name (stp
->bfd
, stp
->the_bfd_section
));
316 sap
->other
[oidx
].sectindex
= stp
->the_bfd_section
->index
;
324 /* Create a section_addr_info from section offsets in ABFD. */
326 static struct section_addr_info
*
327 build_section_addr_info_from_bfd (bfd
*abfd
)
329 struct section_addr_info
*sap
;
331 struct bfd_section
*sec
;
333 sap
= alloc_section_addr_info (bfd_count_sections (abfd
));
334 for (i
= 0, sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
335 if (bfd_get_section_flags (abfd
, sec
) & (SEC_ALLOC
| SEC_LOAD
))
337 sap
->other
[i
].addr
= bfd_get_section_vma (abfd
, sec
);
338 sap
->other
[i
].name
= xstrdup (bfd_get_section_name (abfd
, sec
));
339 sap
->other
[i
].sectindex
= sec
->index
;
345 /* Create a section_addr_info from section offsets in OBJFILE. */
347 struct section_addr_info
*
348 build_section_addr_info_from_objfile (const struct objfile
*objfile
)
350 struct section_addr_info
*sap
;
353 /* Before reread_symbols gets rewritten it is not safe to call:
354 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
356 sap
= build_section_addr_info_from_bfd (objfile
->obfd
);
357 for (i
= 0; i
< sap
->num_sections
&& sap
->other
[i
].name
; i
++)
359 int sectindex
= sap
->other
[i
].sectindex
;
361 sap
->other
[i
].addr
+= objfile
->section_offsets
->offsets
[sectindex
];
366 /* Free all memory allocated by build_section_addr_info_from_section_table. */
369 free_section_addr_info (struct section_addr_info
*sap
)
373 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
374 if (sap
->other
[idx
].name
)
375 xfree (sap
->other
[idx
].name
);
380 /* Initialize OBJFILE's sect_index_* members. */
382 init_objfile_sect_indices (struct objfile
*objfile
)
387 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
389 objfile
->sect_index_text
= sect
->index
;
391 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
393 objfile
->sect_index_data
= sect
->index
;
395 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
397 objfile
->sect_index_bss
= sect
->index
;
399 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
401 objfile
->sect_index_rodata
= sect
->index
;
403 /* This is where things get really weird... We MUST have valid
404 indices for the various sect_index_* members or gdb will abort.
405 So if for example, there is no ".text" section, we have to
406 accomodate that. First, check for a file with the standard
407 one or two segments. */
409 symfile_find_segment_sections (objfile
);
411 /* Except when explicitly adding symbol files at some address,
412 section_offsets contains nothing but zeros, so it doesn't matter
413 which slot in section_offsets the individual sect_index_* members
414 index into. So if they are all zero, it is safe to just point
415 all the currently uninitialized indices to the first slot. But
416 beware: if this is the main executable, it may be relocated
417 later, e.g. by the remote qOffsets packet, and then this will
418 be wrong! That's why we try segments first. */
420 for (i
= 0; i
< objfile
->num_sections
; i
++)
422 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
427 if (i
== objfile
->num_sections
)
429 if (objfile
->sect_index_text
== -1)
430 objfile
->sect_index_text
= 0;
431 if (objfile
->sect_index_data
== -1)
432 objfile
->sect_index_data
= 0;
433 if (objfile
->sect_index_bss
== -1)
434 objfile
->sect_index_bss
= 0;
435 if (objfile
->sect_index_rodata
== -1)
436 objfile
->sect_index_rodata
= 0;
440 /* The arguments to place_section. */
442 struct place_section_arg
444 struct section_offsets
*offsets
;
448 /* Find a unique offset to use for loadable section SECT if
449 the user did not provide an offset. */
452 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
454 struct place_section_arg
*arg
= obj
;
455 CORE_ADDR
*offsets
= arg
->offsets
->offsets
, start_addr
;
457 ULONGEST align
= ((ULONGEST
) 1) << bfd_get_section_alignment (abfd
, sect
);
459 /* We are only interested in allocated sections. */
460 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
463 /* If the user specified an offset, honor it. */
464 if (offsets
[sect
->index
] != 0)
467 /* Otherwise, let's try to find a place for the section. */
468 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
475 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
477 int indx
= cur_sec
->index
;
479 /* We don't need to compare against ourself. */
483 /* We can only conflict with allocated sections. */
484 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
487 /* If the section offset is 0, either the section has not been placed
488 yet, or it was the lowest section placed (in which case LOWEST
489 will be past its end). */
490 if (offsets
[indx
] == 0)
493 /* If this section would overlap us, then we must move up. */
494 if (start_addr
+ bfd_get_section_size (sect
) > offsets
[indx
]
495 && start_addr
< offsets
[indx
] + bfd_get_section_size (cur_sec
))
497 start_addr
= offsets
[indx
] + bfd_get_section_size (cur_sec
);
498 start_addr
= (start_addr
+ align
- 1) & -align
;
503 /* Otherwise, we appear to be OK. So far. */
508 offsets
[sect
->index
] = start_addr
;
509 arg
->lowest
= start_addr
+ bfd_get_section_size (sect
);
512 /* Store struct section_addr_info as prepared (made relative and with SECTINDEX
513 filled-in) by addr_info_make_relative into SECTION_OFFSETS of NUM_SECTIONS
517 relative_addr_info_to_section_offsets (struct section_offsets
*section_offsets
,
519 struct section_addr_info
*addrs
)
523 memset (section_offsets
, 0, SIZEOF_N_SECTION_OFFSETS (num_sections
));
525 /* Now calculate offsets for section that were specified by the caller. */
526 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
528 struct other_sections
*osp
;
530 osp
= &addrs
->other
[i
];
531 if (osp
->sectindex
== -1)
534 /* Record all sections in offsets. */
535 /* The section_offsets in the objfile are here filled in using
537 section_offsets
->offsets
[osp
->sectindex
] = osp
->addr
;
541 /* Transform section name S for a name comparison. prelink can split section
542 `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly
543 prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address
544 of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss'
545 (`.sbss') section has invalid (increased) virtual address. */
548 addr_section_name (const char *s
)
550 if (strcmp (s
, ".dynbss") == 0)
552 if (strcmp (s
, ".sdynbss") == 0)
558 /* qsort comparator for addrs_section_sort. Sort entries in ascending order by
559 their (name, sectindex) pair. sectindex makes the sort by name stable. */
562 addrs_section_compar (const void *ap
, const void *bp
)
564 const struct other_sections
*a
= *((struct other_sections
**) ap
);
565 const struct other_sections
*b
= *((struct other_sections
**) bp
);
566 int retval
, a_idx
, b_idx
;
568 retval
= strcmp (addr_section_name (a
->name
), addr_section_name (b
->name
));
572 return a
->sectindex
- b
->sectindex
;
575 /* Provide sorted array of pointers to sections of ADDRS. The array is
576 terminated by NULL. Caller is responsible to call xfree for it. */
578 static struct other_sections
**
579 addrs_section_sort (struct section_addr_info
*addrs
)
581 struct other_sections
**array
;
584 /* `+ 1' for the NULL terminator. */
585 array
= xmalloc (sizeof (*array
) * (addrs
->num_sections
+ 1));
586 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
587 array
[i
] = &addrs
->other
[i
];
590 qsort (array
, i
, sizeof (*array
), addrs_section_compar
);
595 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
596 also SECTINDEXes specific to ABFD there. This function can be used to
597 rebase ADDRS to start referencing different BFD than before. */
600 addr_info_make_relative (struct section_addr_info
*addrs
, bfd
*abfd
)
602 asection
*lower_sect
;
603 CORE_ADDR lower_offset
;
605 struct cleanup
*my_cleanup
;
606 struct section_addr_info
*abfd_addrs
;
607 struct other_sections
**addrs_sorted
, **abfd_addrs_sorted
;
608 struct other_sections
**addrs_to_abfd_addrs
;
610 /* Find lowest loadable section to be used as starting point for
611 continguous sections. */
613 bfd_map_over_sections (abfd
, find_lowest_section
, &lower_sect
);
614 if (lower_sect
== NULL
)
616 warning (_("no loadable sections found in added symbol-file %s"),
617 bfd_get_filename (abfd
));
621 lower_offset
= bfd_section_vma (bfd_get_filename (abfd
), lower_sect
);
623 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
624 in ABFD. Section names are not unique - there can be multiple sections of
625 the same name. Also the sections of the same name do not have to be
626 adjacent to each other. Some sections may be present only in one of the
627 files. Even sections present in both files do not have to be in the same
630 Use stable sort by name for the sections in both files. Then linearly
631 scan both lists matching as most of the entries as possible. */
633 addrs_sorted
= addrs_section_sort (addrs
);
634 my_cleanup
= make_cleanup (xfree
, addrs_sorted
);
636 abfd_addrs
= build_section_addr_info_from_bfd (abfd
);
637 make_cleanup_free_section_addr_info (abfd_addrs
);
638 abfd_addrs_sorted
= addrs_section_sort (abfd_addrs
);
639 make_cleanup (xfree
, abfd_addrs_sorted
);
641 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and
642 ABFD_ADDRS_SORTED. */
644 addrs_to_abfd_addrs
= xzalloc (sizeof (*addrs_to_abfd_addrs
)
645 * addrs
->num_sections
);
646 make_cleanup (xfree
, addrs_to_abfd_addrs
);
648 while (*addrs_sorted
)
650 const char *sect_name
= addr_section_name ((*addrs_sorted
)->name
);
652 while (*abfd_addrs_sorted
653 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
657 if (*abfd_addrs_sorted
658 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
663 /* Make the found item directly addressable from ADDRS. */
664 index_in_addrs
= *addrs_sorted
- addrs
->other
;
665 gdb_assert (addrs_to_abfd_addrs
[index_in_addrs
] == NULL
);
666 addrs_to_abfd_addrs
[index_in_addrs
] = *abfd_addrs_sorted
;
668 /* Never use the same ABFD entry twice. */
675 /* Calculate offsets for the loadable sections.
676 FIXME! Sections must be in order of increasing loadable section
677 so that contiguous sections can use the lower-offset!!!
679 Adjust offsets if the segments are not contiguous.
680 If the section is contiguous, its offset should be set to
681 the offset of the highest loadable section lower than it
682 (the loadable section directly below it in memory).
683 this_offset = lower_offset = lower_addr - lower_orig_addr */
685 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
687 struct other_sections
*sect
= addrs_to_abfd_addrs
[i
];
691 /* This is the index used by BFD. */
692 addrs
->other
[i
].sectindex
= sect
->sectindex
;
694 if (addrs
->other
[i
].addr
!= 0)
696 addrs
->other
[i
].addr
-= sect
->addr
;
697 lower_offset
= addrs
->other
[i
].addr
;
700 addrs
->other
[i
].addr
= lower_offset
;
704 /* addr_section_name transformation is not used for SECT_NAME. */
705 const char *sect_name
= addrs
->other
[i
].name
;
707 /* This section does not exist in ABFD, which is normally
708 unexpected and we want to issue a warning.
710 However, the ELF prelinker does create a few sections which are
711 marked in the main executable as loadable (they are loaded in
712 memory from the DYNAMIC segment) and yet are not present in
713 separate debug info files. This is fine, and should not cause
714 a warning. Shared libraries contain just the section
715 ".gnu.liblist" but it is not marked as loadable there. There is
716 no other way to identify them than by their name as the sections
717 created by prelink have no special flags.
719 For the sections `.bss' and `.sbss' see addr_section_name. */
721 if (!(strcmp (sect_name
, ".gnu.liblist") == 0
722 || strcmp (sect_name
, ".gnu.conflict") == 0
723 || (strcmp (sect_name
, ".bss") == 0
725 && strcmp (addrs
->other
[i
- 1].name
, ".dynbss") == 0
726 && addrs_to_abfd_addrs
[i
- 1] != NULL
)
727 || (strcmp (sect_name
, ".sbss") == 0
729 && strcmp (addrs
->other
[i
- 1].name
, ".sdynbss") == 0
730 && addrs_to_abfd_addrs
[i
- 1] != NULL
)))
731 warning (_("section %s not found in %s"), sect_name
,
732 bfd_get_filename (abfd
));
734 addrs
->other
[i
].addr
= 0;
735 addrs
->other
[i
].sectindex
= -1;
739 do_cleanups (my_cleanup
);
742 /* Parse the user's idea of an offset for dynamic linking, into our idea
743 of how to represent it for fast symbol reading. This is the default
744 version of the sym_fns.sym_offsets function for symbol readers that
745 don't need to do anything special. It allocates a section_offsets table
746 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
749 default_symfile_offsets (struct objfile
*objfile
,
750 struct section_addr_info
*addrs
)
752 objfile
->num_sections
= bfd_count_sections (objfile
->obfd
);
753 objfile
->section_offsets
= (struct section_offsets
*)
754 obstack_alloc (&objfile
->objfile_obstack
,
755 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
756 relative_addr_info_to_section_offsets (objfile
->section_offsets
,
757 objfile
->num_sections
, addrs
);
759 /* For relocatable files, all loadable sections will start at zero.
760 The zero is meaningless, so try to pick arbitrary addresses such
761 that no loadable sections overlap. This algorithm is quadratic,
762 but the number of sections in a single object file is generally
764 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
766 struct place_section_arg arg
;
767 bfd
*abfd
= objfile
->obfd
;
770 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
771 /* We do not expect this to happen; just skip this step if the
772 relocatable file has a section with an assigned VMA. */
773 if (bfd_section_vma (abfd
, cur_sec
) != 0)
778 CORE_ADDR
*offsets
= objfile
->section_offsets
->offsets
;
780 /* Pick non-overlapping offsets for sections the user did not
782 arg
.offsets
= objfile
->section_offsets
;
784 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
786 /* Correctly filling in the section offsets is not quite
787 enough. Relocatable files have two properties that
788 (most) shared objects do not:
790 - Their debug information will contain relocations. Some
791 shared libraries do also, but many do not, so this can not
794 - If there are multiple code sections they will be loaded
795 at different relative addresses in memory than they are
796 in the objfile, since all sections in the file will start
799 Because GDB has very limited ability to map from an
800 address in debug info to the correct code section,
801 it relies on adding SECT_OFF_TEXT to things which might be
802 code. If we clear all the section offsets, and set the
803 section VMAs instead, then symfile_relocate_debug_section
804 will return meaningful debug information pointing at the
807 GDB has too many different data structures for section
808 addresses - a bfd, objfile, and so_list all have section
809 tables, as does exec_ops. Some of these could probably
812 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
813 cur_sec
= cur_sec
->next
)
815 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
818 bfd_set_section_vma (abfd
, cur_sec
, offsets
[cur_sec
->index
]);
819 exec_set_section_address (bfd_get_filename (abfd
),
821 offsets
[cur_sec
->index
]);
822 offsets
[cur_sec
->index
] = 0;
827 /* Remember the bfd indexes for the .text, .data, .bss and
829 init_objfile_sect_indices (objfile
);
833 /* Divide the file into segments, which are individual relocatable units.
834 This is the default version of the sym_fns.sym_segments function for
835 symbol readers that do not have an explicit representation of segments.
836 It assumes that object files do not have segments, and fully linked
837 files have a single segment. */
839 struct symfile_segment_data
*
840 default_symfile_segments (bfd
*abfd
)
844 struct symfile_segment_data
*data
;
847 /* Relocatable files contain enough information to position each
848 loadable section independently; they should not be relocated
850 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
853 /* Make sure there is at least one loadable section in the file. */
854 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
856 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
864 low
= bfd_get_section_vma (abfd
, sect
);
865 high
= low
+ bfd_get_section_size (sect
);
867 data
= XZALLOC (struct symfile_segment_data
);
868 data
->num_segments
= 1;
869 data
->segment_bases
= XCALLOC (1, CORE_ADDR
);
870 data
->segment_sizes
= XCALLOC (1, CORE_ADDR
);
872 num_sections
= bfd_count_sections (abfd
);
873 data
->segment_info
= XCALLOC (num_sections
, int);
875 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
879 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
882 vma
= bfd_get_section_vma (abfd
, sect
);
885 if (vma
+ bfd_get_section_size (sect
) > high
)
886 high
= vma
+ bfd_get_section_size (sect
);
888 data
->segment_info
[i
] = 1;
891 data
->segment_bases
[0] = low
;
892 data
->segment_sizes
[0] = high
- low
;
897 /* Process a symbol file, as either the main file or as a dynamically
900 OBJFILE is where the symbols are to be read from.
902 ADDRS is the list of section load addresses. If the user has given
903 an 'add-symbol-file' command, then this is the list of offsets and
904 addresses he or she provided as arguments to the command; or, if
905 we're handling a shared library, these are the actual addresses the
906 sections are loaded at, according to the inferior's dynamic linker
907 (as gleaned by GDB's shared library code). We convert each address
908 into an offset from the section VMA's as it appears in the object
909 file, and then call the file's sym_offsets function to convert this
910 into a format-specific offset table --- a `struct section_offsets'.
911 If ADDRS is non-zero, OFFSETS must be zero.
913 OFFSETS is a table of section offsets already in the right
914 format-specific representation. NUM_OFFSETS is the number of
915 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
916 assume this is the proper table the call to sym_offsets described
917 above would produce. Instead of calling sym_offsets, we just dump
918 it right into objfile->section_offsets. (When we're re-reading
919 symbols from an objfile, we don't have the original load address
920 list any more; all we have is the section offset table.) If
921 OFFSETS is non-zero, ADDRS must be zero.
923 ADD_FLAGS encodes verbosity level, whether this is main symbol or
924 an extra symbol file such as dynamically loaded code, and wether
925 breakpoint reset should be deferred. */
928 syms_from_objfile (struct objfile
*objfile
,
929 struct section_addr_info
*addrs
,
930 struct section_offsets
*offsets
,
934 struct section_addr_info
*local_addr
= NULL
;
935 struct cleanup
*old_chain
;
936 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
938 gdb_assert (! (addrs
&& offsets
));
940 init_entry_point_info (objfile
);
941 objfile
->sf
= find_sym_fns (objfile
->obfd
);
943 if (objfile
->sf
== NULL
)
944 return; /* No symbols. */
946 /* Make sure that partially constructed symbol tables will be cleaned up
947 if an error occurs during symbol reading. */
948 old_chain
= make_cleanup_free_objfile (objfile
);
950 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
951 list. We now establish the convention that an addr of zero means
952 no load address was specified. */
953 if (! addrs
&& ! offsets
)
956 = alloc_section_addr_info (bfd_count_sections (objfile
->obfd
));
957 make_cleanup (xfree
, local_addr
);
961 /* Now either addrs or offsets is non-zero. */
965 /* We will modify the main symbol table, make sure that all its users
966 will be cleaned up if an error occurs during symbol reading. */
967 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
969 /* Since no error yet, throw away the old symbol table. */
971 if (symfile_objfile
!= NULL
)
973 free_objfile (symfile_objfile
);
974 gdb_assert (symfile_objfile
== NULL
);
977 /* Currently we keep symbols from the add-symbol-file command.
978 If the user wants to get rid of them, they should do "symbol-file"
979 without arguments first. Not sure this is the best behavior
982 (*objfile
->sf
->sym_new_init
) (objfile
);
985 /* Convert addr into an offset rather than an absolute address.
986 We find the lowest address of a loaded segment in the objfile,
987 and assume that <addr> is where that got loaded.
989 We no longer warn if the lowest section is not a text segment (as
990 happens for the PA64 port. */
991 if (addrs
&& addrs
->other
[0].name
)
992 addr_info_make_relative (addrs
, objfile
->obfd
);
994 /* Initialize symbol reading routines for this objfile, allow complaints to
995 appear for this new file, and record how verbose to be, then do the
996 initial symbol reading for this file. */
998 (*objfile
->sf
->sym_init
) (objfile
);
999 clear_complaints (&symfile_complaints
, 1, add_flags
& SYMFILE_VERBOSE
);
1002 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
1005 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_offsets
);
1007 /* Just copy in the offset table directly as given to us. */
1008 objfile
->num_sections
= num_offsets
;
1009 objfile
->section_offsets
1010 = ((struct section_offsets
*)
1011 obstack_alloc (&objfile
->objfile_obstack
, size
));
1012 memcpy (objfile
->section_offsets
, offsets
, size
);
1014 init_objfile_sect_indices (objfile
);
1017 (*objfile
->sf
->sym_read
) (objfile
, add_flags
);
1019 if ((add_flags
& SYMFILE_NO_READ
) == 0)
1020 require_partial_symbols (objfile
, 0);
1022 /* Discard cleanups as symbol reading was successful. */
1024 discard_cleanups (old_chain
);
1028 /* Perform required actions after either reading in the initial
1029 symbols for a new objfile, or mapping in the symbols from a reusable
1030 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
1033 new_symfile_objfile (struct objfile
*objfile
, int add_flags
)
1035 /* If this is the main symbol file we have to clean up all users of the
1036 old main symbol file. Otherwise it is sufficient to fixup all the
1037 breakpoints that may have been redefined by this symbol file. */
1038 if (add_flags
& SYMFILE_MAINLINE
)
1040 /* OK, make it the "real" symbol file. */
1041 symfile_objfile
= objfile
;
1043 clear_symtab_users (add_flags
);
1045 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
1047 breakpoint_re_set ();
1050 /* We're done reading the symbol file; finish off complaints. */
1051 clear_complaints (&symfile_complaints
, 0, add_flags
& SYMFILE_VERBOSE
);
1054 /* Process a symbol file, as either the main file or as a dynamically
1057 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1058 This BFD will be closed on error, and is always consumed by this function.
1060 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1061 extra, such as dynamically loaded code, and what to do with breakpoins.
1063 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
1064 syms_from_objfile, above.
1065 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1067 PARENT is the original objfile if ABFD is a separate debug info file.
1068 Otherwise PARENT is NULL.
1070 Upon success, returns a pointer to the objfile that was added.
1071 Upon failure, jumps back to command level (never returns). */
1073 static struct objfile
*
1074 symbol_file_add_with_addrs_or_offsets (bfd
*abfd
,
1076 struct section_addr_info
*addrs
,
1077 struct section_offsets
*offsets
,
1079 int flags
, struct objfile
*parent
)
1081 struct objfile
*objfile
;
1082 struct cleanup
*my_cleanups
;
1083 const char *name
= bfd_get_filename (abfd
);
1084 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1085 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
1086 const int should_print
= ((from_tty
|| info_verbose
)
1087 && (readnow_symbol_files
1088 || (add_flags
& SYMFILE_NO_READ
) == 0));
1090 if (readnow_symbol_files
)
1092 flags
|= OBJF_READNOW
;
1093 add_flags
&= ~SYMFILE_NO_READ
;
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 ())
1104 && !query (_("Load new symbol table from \"%s\"? "), name
))
1105 error (_("Not confirmed."));
1107 objfile
= allocate_objfile (abfd
, flags
| (mainline
? OBJF_MAINLINE
: 0));
1108 discard_cleanups (my_cleanups
);
1111 add_separate_debug_objfile (objfile
, parent
);
1113 /* We either created a new mapped symbol table, mapped an existing
1114 symbol table file which has not had initial symbol reading
1115 performed, or need to read an unmapped symbol table. */
1118 if (deprecated_pre_add_symbol_hook
)
1119 deprecated_pre_add_symbol_hook (name
);
1122 printf_unfiltered (_("Reading symbols from %s..."), name
);
1124 gdb_flush (gdb_stdout
);
1127 syms_from_objfile (objfile
, addrs
, offsets
, num_offsets
,
1130 /* We now have at least a partial symbol table. Check to see if the
1131 user requested that all symbols be read on initial access via either
1132 the gdb startup command line or on a per symbol file basis. Expand
1133 all partial symbol tables for this objfile if so. */
1135 if ((flags
& OBJF_READNOW
))
1139 printf_unfiltered (_("expanding to full symbols..."));
1141 gdb_flush (gdb_stdout
);
1145 objfile
->sf
->qf
->expand_all_symtabs (objfile
);
1148 if (should_print
&& !objfile_has_symbols (objfile
))
1151 printf_unfiltered (_("(no debugging symbols found)..."));
1157 if (deprecated_post_add_symbol_hook
)
1158 deprecated_post_add_symbol_hook ();
1160 printf_unfiltered (_("done.\n"));
1163 /* We print some messages regardless of whether 'from_tty ||
1164 info_verbose' is true, so make sure they go out at the right
1166 gdb_flush (gdb_stdout
);
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
1204 do_cleanups (my_cleanup
);
1207 /* Process the symbol file ABFD, as either the main file or as a
1208 dynamically loaded file.
1210 See symbol_file_add_with_addrs_or_offsets's comments for
1213 symbol_file_add_from_bfd (bfd
*abfd
, int add_flags
,
1214 struct section_addr_info
*addrs
,
1215 int flags
, struct objfile
*parent
)
1217 return symbol_file_add_with_addrs_or_offsets (abfd
, add_flags
, addrs
, 0, 0,
1222 /* Process a symbol file, as either the main file or as a dynamically
1223 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
1226 symbol_file_add (char *name
, int add_flags
, struct section_addr_info
*addrs
,
1229 return symbol_file_add_from_bfd (symfile_bfd_open (name
), add_flags
, addrs
,
1234 /* Call symbol_file_add() with default values and update whatever is
1235 affected by the loading of a new main().
1236 Used when the file is supplied in the gdb command line
1237 and by some targets with special loading requirements.
1238 The auxiliary function, symbol_file_add_main_1(), has the flags
1239 argument for the switches that can only be specified in the symbol_file
1243 symbol_file_add_main (char *args
, int from_tty
)
1245 symbol_file_add_main_1 (args
, from_tty
, 0);
1249 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
1251 const int add_flags
= SYMFILE_MAINLINE
| (from_tty
? SYMFILE_VERBOSE
: 0);
1252 symbol_file_add (args
, add_flags
, NULL
, flags
);
1254 /* Getting new symbols may change our opinion about
1255 what is frameless. */
1256 reinit_frame_cache ();
1258 set_initial_language ();
1262 symbol_file_clear (int from_tty
)
1264 if ((have_full_symbols () || have_partial_symbols ())
1267 ? !query (_("Discard symbol table from `%s'? "),
1268 symfile_objfile
->name
)
1269 : !query (_("Discard symbol table? "))))
1270 error (_("Not confirmed."));
1272 /* solib descriptors may have handles to objfiles. Wipe them before their
1273 objfiles get stale by free_all_objfiles. */
1274 no_shared_libraries (NULL
, from_tty
);
1276 free_all_objfiles ();
1278 gdb_assert (symfile_objfile
== NULL
);
1280 printf_unfiltered (_("No symbol file now.\n"));
1284 get_debug_link_info (struct objfile
*objfile
, unsigned long *crc32_out
)
1287 bfd_size_type debuglink_size
;
1288 unsigned long crc32
;
1292 sect
= bfd_get_section_by_name (objfile
->obfd
, ".gnu_debuglink");
1297 debuglink_size
= bfd_section_size (objfile
->obfd
, sect
);
1299 contents
= xmalloc (debuglink_size
);
1300 bfd_get_section_contents (objfile
->obfd
, sect
, contents
,
1301 (file_ptr
)0, (bfd_size_type
)debuglink_size
);
1303 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1304 crc_offset
= strlen (contents
) + 1;
1305 crc_offset
= (crc_offset
+ 3) & ~3;
1307 crc32
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) (contents
+ crc_offset
));
1313 /* Return 32-bit CRC for ABFD. If successful store it to *FILE_CRC_RETURN and
1314 return 1. Otherwise print a warning and return 0. ABFD seek position is
1318 get_file_crc (bfd
*abfd
, unsigned long *file_crc_return
)
1320 unsigned long file_crc
= 0;
1322 if (bfd_seek (abfd
, 0, SEEK_SET
) != 0)
1324 warning (_("Problem reading \"%s\" for CRC: %s"),
1325 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1331 gdb_byte buffer
[8 * 1024];
1332 bfd_size_type count
;
1334 count
= bfd_bread (buffer
, sizeof (buffer
), abfd
);
1335 if (count
== (bfd_size_type
) -1)
1337 warning (_("Problem reading \"%s\" for CRC: %s"),
1338 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1343 file_crc
= gnu_debuglink_crc32 (file_crc
, buffer
, count
);
1346 *file_crc_return
= file_crc
;
1351 separate_debug_file_exists (const char *name
, unsigned long crc
,
1352 struct objfile
*parent_objfile
)
1354 unsigned long file_crc
;
1357 struct stat parent_stat
, abfd_stat
;
1358 int verified_as_different
;
1360 /* Find a separate debug info file as if symbols would be present in
1361 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1362 section can contain just the basename of PARENT_OBJFILE without any
1363 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1364 the separate debug infos with the same basename can exist. */
1366 if (filename_cmp (name
, parent_objfile
->name
) == 0)
1369 abfd
= bfd_open_maybe_remote (name
);
1374 /* Verify symlinks were not the cause of filename_cmp name difference above.
1376 Some operating systems, e.g. Windows, do not provide a meaningful
1377 st_ino; they always set it to zero. (Windows does provide a
1378 meaningful st_dev.) Do not indicate a duplicate library in that
1379 case. While there is no guarantee that a system that provides
1380 meaningful inode numbers will never set st_ino to zero, this is
1381 merely an optimization, so we do not need to worry about false
1384 if (bfd_stat (abfd
, &abfd_stat
) == 0
1385 && abfd_stat
.st_ino
!= 0
1386 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0)
1388 if (abfd_stat
.st_dev
== parent_stat
.st_dev
1389 && abfd_stat
.st_ino
== parent_stat
.st_ino
)
1394 verified_as_different
= 1;
1397 verified_as_different
= 0;
1399 file_crc_p
= get_file_crc (abfd
, &file_crc
);
1406 if (crc
!= file_crc
)
1408 /* If one (or both) the files are accessed for example the via "remote:"
1409 gdbserver way it does not support the bfd_stat operation. Verify
1410 whether those two files are not the same manually. */
1412 if (!verified_as_different
&& !parent_objfile
->crc32_p
)
1414 parent_objfile
->crc32_p
= get_file_crc (parent_objfile
->obfd
,
1415 &parent_objfile
->crc32
);
1416 if (!parent_objfile
->crc32_p
)
1420 if (verified_as_different
|| parent_objfile
->crc32
!= file_crc
)
1421 warning (_("the debug information found in \"%s\""
1422 " does not match \"%s\" (CRC mismatch).\n"),
1423 name
, parent_objfile
->name
);
1431 char *debug_file_directory
= NULL
;
1433 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1434 struct cmd_list_element
*c
, const char *value
)
1436 fprintf_filtered (file
,
1437 _("The directory where separate debug "
1438 "symbols are searched for is \"%s\".\n"),
1442 #if ! defined (DEBUG_SUBDIRECTORY)
1443 #define DEBUG_SUBDIRECTORY ".debug"
1447 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1449 char *basename
, *debugdir
;
1451 char *debugfile
= NULL
;
1452 char *canon_name
= NULL
;
1453 unsigned long crc32
;
1456 basename
= get_debug_link_info (objfile
, &crc32
);
1458 if (basename
== NULL
)
1459 /* There's no separate debug info, hence there's no way we could
1460 load it => no warning. */
1461 goto cleanup_return_debugfile
;
1463 dir
= xstrdup (objfile
->name
);
1465 /* Strip off the final filename part, leaving the directory name,
1466 followed by a slash. The directory can be relative or absolute. */
1467 for (i
= strlen(dir
) - 1; i
>= 0; i
--)
1469 if (IS_DIR_SEPARATOR (dir
[i
]))
1472 /* If I is -1 then no directory is present there and DIR will be "". */
1475 /* Set I to max (strlen (canon_name), strlen (dir)). */
1476 canon_name
= lrealpath (dir
);
1478 if (canon_name
&& strlen (canon_name
) > i
)
1479 i
= strlen (canon_name
);
1481 debugfile
= xmalloc (strlen (debug_file_directory
) + 1
1483 + strlen (DEBUG_SUBDIRECTORY
)
1488 /* First try in the same directory as the original file. */
1489 strcpy (debugfile
, dir
);
1490 strcat (debugfile
, basename
);
1492 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1493 goto cleanup_return_debugfile
;
1495 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1496 strcpy (debugfile
, dir
);
1497 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1498 strcat (debugfile
, "/");
1499 strcat (debugfile
, basename
);
1501 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1502 goto cleanup_return_debugfile
;
1504 /* Then try in the global debugfile directories.
1506 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1507 cause "/..." lookups. */
1509 debugdir
= debug_file_directory
;
1514 while (*debugdir
== DIRNAME_SEPARATOR
)
1517 debugdir_end
= strchr (debugdir
, DIRNAME_SEPARATOR
);
1518 if (debugdir_end
== NULL
)
1519 debugdir_end
= &debugdir
[strlen (debugdir
)];
1521 memcpy (debugfile
, debugdir
, debugdir_end
- debugdir
);
1522 debugfile
[debugdir_end
- debugdir
] = 0;
1523 strcat (debugfile
, "/");
1524 strcat (debugfile
, dir
);
1525 strcat (debugfile
, basename
);
1527 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1528 goto cleanup_return_debugfile
;
1530 /* If the file is in the sysroot, try using its base path in the
1531 global debugfile directory. */
1533 && filename_ncmp (canon_name
, gdb_sysroot
,
1534 strlen (gdb_sysroot
)) == 0
1535 && IS_DIR_SEPARATOR (canon_name
[strlen (gdb_sysroot
)]))
1537 memcpy (debugfile
, debugdir
, debugdir_end
- debugdir
);
1538 debugfile
[debugdir_end
- debugdir
] = 0;
1539 strcat (debugfile
, canon_name
+ strlen (gdb_sysroot
));
1540 strcat (debugfile
, "/");
1541 strcat (debugfile
, basename
);
1543 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1544 goto cleanup_return_debugfile
;
1547 debugdir
= debugdir_end
;
1549 while (*debugdir
!= 0);
1554 cleanup_return_debugfile
:
1562 /* This is the symbol-file command. Read the file, analyze its
1563 symbols, and add a struct symtab to a symtab list. The syntax of
1564 the command is rather bizarre:
1566 1. The function buildargv implements various quoting conventions
1567 which are undocumented and have little or nothing in common with
1568 the way things are quoted (or not quoted) elsewhere in GDB.
1570 2. Options are used, which are not generally used in GDB (perhaps
1571 "set mapped on", "set readnow on" would be better)
1573 3. The order of options matters, which is contrary to GNU
1574 conventions (because it is confusing and inconvenient). */
1577 symbol_file_command (char *args
, int from_tty
)
1583 symbol_file_clear (from_tty
);
1587 char **argv
= gdb_buildargv (args
);
1588 int flags
= OBJF_USERLOADED
;
1589 struct cleanup
*cleanups
;
1592 cleanups
= make_cleanup_freeargv (argv
);
1593 while (*argv
!= NULL
)
1595 if (strcmp (*argv
, "-readnow") == 0)
1596 flags
|= OBJF_READNOW
;
1597 else if (**argv
== '-')
1598 error (_("unknown option `%s'"), *argv
);
1601 symbol_file_add_main_1 (*argv
, from_tty
, flags
);
1609 error (_("no symbol file name was specified"));
1611 do_cleanups (cleanups
);
1615 /* Set the initial language.
1617 FIXME: A better solution would be to record the language in the
1618 psymtab when reading partial symbols, and then use it (if known) to
1619 set the language. This would be a win for formats that encode the
1620 language in an easily discoverable place, such as DWARF. For
1621 stabs, we can jump through hoops looking for specially named
1622 symbols or try to intuit the language from the specific type of
1623 stabs we find, but we can't do that until later when we read in
1627 set_initial_language (void)
1629 enum language lang
= language_unknown
;
1631 if (language_of_main
!= language_unknown
)
1632 lang
= language_of_main
;
1635 const char *filename
;
1637 filename
= find_main_filename ();
1638 if (filename
!= NULL
)
1639 lang
= deduce_language_from_filename (filename
);
1642 if (lang
== language_unknown
)
1644 /* Make C the default language */
1648 set_language (lang
);
1649 expected_language
= current_language
; /* Don't warn the user. */
1652 /* If NAME is a remote name open the file using remote protocol, otherwise
1653 open it normally. */
1656 bfd_open_maybe_remote (const char *name
)
1658 if (remote_filename_p (name
))
1659 return remote_bfd_open (name
, gnutarget
);
1661 return bfd_openr (name
, gnutarget
);
1665 /* Open the file specified by NAME and hand it off to BFD for
1666 preliminary analysis. Return a newly initialized bfd *, which
1667 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1668 absolute). In case of trouble, error() is called. */
1671 symfile_bfd_open (char *name
)
1675 char *absolute_name
;
1677 if (remote_filename_p (name
))
1679 name
= xstrdup (name
);
1680 sym_bfd
= remote_bfd_open (name
, gnutarget
);
1683 make_cleanup (xfree
, name
);
1684 error (_("`%s': can't open to read symbols: %s."), name
,
1685 bfd_errmsg (bfd_get_error ()));
1688 if (!bfd_check_format (sym_bfd
, bfd_object
))
1690 bfd_close (sym_bfd
);
1691 make_cleanup (xfree
, name
);
1692 error (_("`%s': can't read symbols: %s."), name
,
1693 bfd_errmsg (bfd_get_error ()));
1699 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy. */
1701 /* Look down path for it, allocate 2nd new malloc'd copy. */
1702 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, name
,
1703 O_RDONLY
| O_BINARY
, &absolute_name
);
1704 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1707 char *exename
= alloca (strlen (name
) + 5);
1709 strcat (strcpy (exename
, name
), ".exe");
1710 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, exename
,
1711 O_RDONLY
| O_BINARY
, &absolute_name
);
1716 make_cleanup (xfree
, name
);
1717 perror_with_name (name
);
1720 /* Free 1st new malloc'd copy, but keep the 2nd malloc'd copy in
1721 bfd. It'll be freed in free_objfile(). */
1723 name
= absolute_name
;
1725 sym_bfd
= bfd_fopen (name
, gnutarget
, FOPEN_RB
, desc
);
1729 make_cleanup (xfree
, name
);
1730 error (_("`%s': can't open to read symbols: %s."), name
,
1731 bfd_errmsg (bfd_get_error ()));
1733 bfd_set_cacheable (sym_bfd
, 1);
1735 if (!bfd_check_format (sym_bfd
, bfd_object
))
1737 /* FIXME: should be checking for errors from bfd_close (for one
1738 thing, on error it does not free all the storage associated
1740 bfd_close (sym_bfd
); /* This also closes desc. */
1741 make_cleanup (xfree
, name
);
1742 error (_("`%s': can't read symbols: %s."), name
,
1743 bfd_errmsg (bfd_get_error ()));
1746 /* bfd_usrdata exists for applications and libbfd must not touch it. */
1747 gdb_assert (bfd_usrdata (sym_bfd
) == NULL
);
1752 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1753 the section was not found. */
1756 get_section_index (struct objfile
*objfile
, char *section_name
)
1758 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1766 /* Link SF into the global symtab_fns list. Called on startup by the
1767 _initialize routine in each object file format reader, to register
1768 information about each format the reader is prepared to handle. */
1771 add_symtab_fns (const struct sym_fns
*sf
)
1773 VEC_safe_push (sym_fns_ptr
, symtab_fns
, sf
);
1776 /* Initialize OBJFILE to read symbols from its associated BFD. It
1777 either returns or calls error(). The result is an initialized
1778 struct sym_fns in the objfile structure, that contains cached
1779 information about the symbol file. */
1781 static const struct sym_fns
*
1782 find_sym_fns (bfd
*abfd
)
1784 const struct sym_fns
*sf
;
1785 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1788 if (our_flavour
== bfd_target_srec_flavour
1789 || our_flavour
== bfd_target_ihex_flavour
1790 || our_flavour
== bfd_target_tekhex_flavour
)
1791 return NULL
; /* No symbols. */
1793 for (i
= 0; VEC_iterate (sym_fns_ptr
, symtab_fns
, i
, sf
); ++i
)
1794 if (our_flavour
== sf
->sym_flavour
)
1797 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1798 bfd_get_target (abfd
));
1802 /* This function runs the load command of our current target. */
1805 load_command (char *arg
, int from_tty
)
1809 /* The user might be reloading because the binary has changed. Take
1810 this opportunity to check. */
1811 reopen_exec_file ();
1819 parg
= arg
= get_exec_file (1);
1821 /* Count how many \ " ' tab space there are in the name. */
1822 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1830 /* We need to quote this string so buildargv can pull it apart. */
1831 char *temp
= xmalloc (strlen (arg
) + count
+ 1 );
1835 make_cleanup (xfree
, temp
);
1838 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1840 strncpy (ptemp
, prev
, parg
- prev
);
1841 ptemp
+= parg
- prev
;
1845 strcpy (ptemp
, prev
);
1851 target_load (arg
, from_tty
);
1853 /* After re-loading the executable, we don't really know which
1854 overlays are mapped any more. */
1855 overlay_cache_invalid
= 1;
1858 /* This version of "load" should be usable for any target. Currently
1859 it is just used for remote targets, not inftarg.c or core files,
1860 on the theory that only in that case is it useful.
1862 Avoiding xmodem and the like seems like a win (a) because we don't have
1863 to worry about finding it, and (b) On VMS, fork() is very slow and so
1864 we don't want to run a subprocess. On the other hand, I'm not sure how
1865 performance compares. */
1867 static int validate_download
= 0;
1869 /* Callback service function for generic_load (bfd_map_over_sections). */
1872 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1874 bfd_size_type
*sum
= data
;
1876 *sum
+= bfd_get_section_size (asec
);
1879 /* Opaque data for load_section_callback. */
1880 struct load_section_data
{
1881 unsigned long load_offset
;
1882 struct load_progress_data
*progress_data
;
1883 VEC(memory_write_request_s
) *requests
;
1886 /* Opaque data for load_progress. */
1887 struct load_progress_data
{
1888 /* Cumulative data. */
1889 unsigned long write_count
;
1890 unsigned long data_count
;
1891 bfd_size_type total_size
;
1894 /* Opaque data for load_progress for a single section. */
1895 struct load_progress_section_data
{
1896 struct load_progress_data
*cumulative
;
1898 /* Per-section data. */
1899 const char *section_name
;
1900 ULONGEST section_sent
;
1901 ULONGEST section_size
;
1906 /* Target write callback routine for progress reporting. */
1909 load_progress (ULONGEST bytes
, void *untyped_arg
)
1911 struct load_progress_section_data
*args
= untyped_arg
;
1912 struct load_progress_data
*totals
;
1915 /* Writing padding data. No easy way to get at the cumulative
1916 stats, so just ignore this. */
1919 totals
= args
->cumulative
;
1921 if (bytes
== 0 && args
->section_sent
== 0)
1923 /* The write is just starting. Let the user know we've started
1925 ui_out_message (current_uiout
, 0, "Loading section %s, size %s lma %s\n",
1926 args
->section_name
, hex_string (args
->section_size
),
1927 paddress (target_gdbarch
, args
->lma
));
1931 if (validate_download
)
1933 /* Broken memories and broken monitors manifest themselves here
1934 when bring new computers to life. This doubles already slow
1936 /* NOTE: cagney/1999-10-18: A more efficient implementation
1937 might add a verify_memory() method to the target vector and
1938 then use that. remote.c could implement that method using
1939 the ``qCRC'' packet. */
1940 gdb_byte
*check
= xmalloc (bytes
);
1941 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
1943 if (target_read_memory (args
->lma
, check
, bytes
) != 0)
1944 error (_("Download verify read failed at %s"),
1945 paddress (target_gdbarch
, args
->lma
));
1946 if (memcmp (args
->buffer
, check
, bytes
) != 0)
1947 error (_("Download verify compare failed at %s"),
1948 paddress (target_gdbarch
, args
->lma
));
1949 do_cleanups (verify_cleanups
);
1951 totals
->data_count
+= bytes
;
1953 args
->buffer
+= bytes
;
1954 totals
->write_count
+= 1;
1955 args
->section_sent
+= bytes
;
1957 || (deprecated_ui_load_progress_hook
!= NULL
1958 && deprecated_ui_load_progress_hook (args
->section_name
,
1959 args
->section_sent
)))
1960 error (_("Canceled the download"));
1962 if (deprecated_show_load_progress
!= NULL
)
1963 deprecated_show_load_progress (args
->section_name
,
1967 totals
->total_size
);
1970 /* Callback service function for generic_load (bfd_map_over_sections). */
1973 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1975 struct memory_write_request
*new_request
;
1976 struct load_section_data
*args
= data
;
1977 struct load_progress_section_data
*section_data
;
1978 bfd_size_type size
= bfd_get_section_size (asec
);
1980 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1982 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
1988 new_request
= VEC_safe_push (memory_write_request_s
,
1989 args
->requests
, NULL
);
1990 memset (new_request
, 0, sizeof (struct memory_write_request
));
1991 section_data
= xcalloc (1, sizeof (struct load_progress_section_data
));
1992 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1993 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size
1995 new_request
->data
= xmalloc (size
);
1996 new_request
->baton
= section_data
;
1998 buffer
= new_request
->data
;
2000 section_data
->cumulative
= args
->progress_data
;
2001 section_data
->section_name
= sect_name
;
2002 section_data
->section_size
= size
;
2003 section_data
->lma
= new_request
->begin
;
2004 section_data
->buffer
= buffer
;
2006 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
2009 /* Clean up an entire memory request vector, including load
2010 data and progress records. */
2013 clear_memory_write_data (void *arg
)
2015 VEC(memory_write_request_s
) **vec_p
= arg
;
2016 VEC(memory_write_request_s
) *vec
= *vec_p
;
2018 struct memory_write_request
*mr
;
2020 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
2025 VEC_free (memory_write_request_s
, vec
);
2029 generic_load (char *args
, int from_tty
)
2032 struct timeval start_time
, end_time
;
2034 struct cleanup
*old_cleanups
= make_cleanup (null_cleanup
, 0);
2035 struct load_section_data cbdata
;
2036 struct load_progress_data total_progress
;
2037 struct ui_out
*uiout
= current_uiout
;
2042 memset (&cbdata
, 0, sizeof (cbdata
));
2043 memset (&total_progress
, 0, sizeof (total_progress
));
2044 cbdata
.progress_data
= &total_progress
;
2046 make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
2049 error_no_arg (_("file to load"));
2051 argv
= gdb_buildargv (args
);
2052 make_cleanup_freeargv (argv
);
2054 filename
= tilde_expand (argv
[0]);
2055 make_cleanup (xfree
, filename
);
2057 if (argv
[1] != NULL
)
2061 cbdata
.load_offset
= strtoul (argv
[1], &endptr
, 0);
2063 /* If the last word was not a valid number then
2064 treat it as a file name with spaces in. */
2065 if (argv
[1] == endptr
)
2066 error (_("Invalid download offset:%s."), argv
[1]);
2068 if (argv
[2] != NULL
)
2069 error (_("Too many parameters."));
2072 /* Open the file for loading. */
2073 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
2074 if (loadfile_bfd
== NULL
)
2076 perror_with_name (filename
);
2080 /* FIXME: should be checking for errors from bfd_close (for one thing,
2081 on error it does not free all the storage associated with the
2083 make_cleanup_bfd_close (loadfile_bfd
);
2085 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
2087 error (_("\"%s\" is not an object file: %s"), filename
,
2088 bfd_errmsg (bfd_get_error ()));
2091 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
2092 (void *) &total_progress
.total_size
);
2094 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
2096 gettimeofday (&start_time
, NULL
);
2098 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2099 load_progress
) != 0)
2100 error (_("Load failed"));
2102 gettimeofday (&end_time
, NULL
);
2104 entry
= bfd_get_start_address (loadfile_bfd
);
2105 ui_out_text (uiout
, "Start address ");
2106 ui_out_field_fmt (uiout
, "address", "%s", paddress (target_gdbarch
, entry
));
2107 ui_out_text (uiout
, ", load size ");
2108 ui_out_field_fmt (uiout
, "load-size", "%lu", total_progress
.data_count
);
2109 ui_out_text (uiout
, "\n");
2110 /* We were doing this in remote-mips.c, I suspect it is right
2111 for other targets too. */
2112 regcache_write_pc (get_current_regcache (), entry
);
2114 /* Reset breakpoints, now that we have changed the load image. For
2115 instance, breakpoints may have been set (or reset, by
2116 post_create_inferior) while connected to the target but before we
2117 loaded the program. In that case, the prologue analyzer could
2118 have read instructions from the target to find the right
2119 breakpoint locations. Loading has changed the contents of that
2122 breakpoint_re_set ();
2124 /* FIXME: are we supposed to call symbol_file_add or not? According
2125 to a comment from remote-mips.c (where a call to symbol_file_add
2126 was commented out), making the call confuses GDB if more than one
2127 file is loaded in. Some targets do (e.g., remote-vx.c) but
2128 others don't (or didn't - perhaps they have all been deleted). */
2130 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2131 total_progress
.write_count
,
2132 &start_time
, &end_time
);
2134 do_cleanups (old_cleanups
);
2137 /* Report how fast the transfer went. */
2139 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
2140 replaced by print_transfer_performance (with a very different
2141 function signature). */
2144 report_transfer_performance (unsigned long data_count
, time_t start_time
,
2147 struct timeval start
, end
;
2149 start
.tv_sec
= start_time
;
2151 end
.tv_sec
= end_time
;
2154 print_transfer_performance (gdb_stdout
, data_count
, 0, &start
, &end
);
2158 print_transfer_performance (struct ui_file
*stream
,
2159 unsigned long data_count
,
2160 unsigned long write_count
,
2161 const struct timeval
*start_time
,
2162 const struct timeval
*end_time
)
2164 ULONGEST time_count
;
2165 struct ui_out
*uiout
= current_uiout
;
2167 /* Compute the elapsed time in milliseconds, as a tradeoff between
2168 accuracy and overflow. */
2169 time_count
= (end_time
->tv_sec
- start_time
->tv_sec
) * 1000;
2170 time_count
+= (end_time
->tv_usec
- start_time
->tv_usec
) / 1000;
2172 ui_out_text (uiout
, "Transfer rate: ");
2175 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / time_count
;
2177 if (ui_out_is_mi_like_p (uiout
))
2179 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
* 8);
2180 ui_out_text (uiout
, " bits/sec");
2182 else if (rate
< 1024)
2184 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
);
2185 ui_out_text (uiout
, " bytes/sec");
2189 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
/ 1024);
2190 ui_out_text (uiout
, " KB/sec");
2195 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
2196 ui_out_text (uiout
, " bits in <1 sec");
2198 if (write_count
> 0)
2200 ui_out_text (uiout
, ", ");
2201 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
2202 ui_out_text (uiout
, " bytes/write");
2204 ui_out_text (uiout
, ".\n");
2207 /* This function allows the addition of incrementally linked object files.
2208 It does not modify any state in the target, only in the debugger. */
2209 /* Note: ezannoni 2000-04-13 This function/command used to have a
2210 special case syntax for the rombug target (Rombug is the boot
2211 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2212 rombug case, the user doesn't need to supply a text address,
2213 instead a call to target_link() (in target.c) would supply the
2214 value to use. We are now discontinuing this type of ad hoc syntax. */
2217 add_symbol_file_command (char *args
, int from_tty
)
2219 struct gdbarch
*gdbarch
= get_current_arch ();
2220 char *filename
= NULL
;
2221 int flags
= OBJF_USERLOADED
;
2223 int section_index
= 0;
2227 int expecting_sec_name
= 0;
2228 int expecting_sec_addr
= 0;
2237 struct section_addr_info
*section_addrs
;
2238 struct sect_opt
*sect_opts
= NULL
;
2239 size_t num_sect_opts
= 0;
2240 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2243 sect_opts
= (struct sect_opt
*) xmalloc (num_sect_opts
2244 * sizeof (struct sect_opt
));
2249 error (_("add-symbol-file takes a file name and an address"));
2251 argv
= gdb_buildargv (args
);
2252 make_cleanup_freeargv (argv
);
2254 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2256 /* Process the argument. */
2259 /* The first argument is the file name. */
2260 filename
= tilde_expand (arg
);
2261 make_cleanup (xfree
, filename
);
2266 /* The second argument is always the text address at which
2267 to load the program. */
2268 sect_opts
[section_index
].name
= ".text";
2269 sect_opts
[section_index
].value
= arg
;
2270 if (++section_index
>= num_sect_opts
)
2273 sect_opts
= ((struct sect_opt
*)
2274 xrealloc (sect_opts
,
2276 * sizeof (struct sect_opt
)));
2281 /* It's an option (starting with '-') or it's an argument
2286 if (strcmp (arg
, "-readnow") == 0)
2287 flags
|= OBJF_READNOW
;
2288 else if (strcmp (arg
, "-s") == 0)
2290 expecting_sec_name
= 1;
2291 expecting_sec_addr
= 1;
2296 if (expecting_sec_name
)
2298 sect_opts
[section_index
].name
= arg
;
2299 expecting_sec_name
= 0;
2302 if (expecting_sec_addr
)
2304 sect_opts
[section_index
].value
= arg
;
2305 expecting_sec_addr
= 0;
2306 if (++section_index
>= num_sect_opts
)
2309 sect_opts
= ((struct sect_opt
*)
2310 xrealloc (sect_opts
,
2312 * sizeof (struct sect_opt
)));
2316 error (_("USAGE: add-symbol-file <filename> <textaddress>"
2317 " [-readnow] [-s <secname> <addr>]*"));
2322 /* This command takes at least two arguments. The first one is a
2323 filename, and the second is the address where this file has been
2324 loaded. Abort now if this address hasn't been provided by the
2326 if (section_index
< 1)
2327 error (_("The address where %s has been loaded is missing"), filename
);
2329 /* Print the prompt for the query below. And save the arguments into
2330 a sect_addr_info structure to be passed around to other
2331 functions. We have to split this up into separate print
2332 statements because hex_string returns a local static
2335 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename
);
2336 section_addrs
= alloc_section_addr_info (section_index
);
2337 make_cleanup (xfree
, section_addrs
);
2338 for (i
= 0; i
< section_index
; i
++)
2341 char *val
= sect_opts
[i
].value
;
2342 char *sec
= sect_opts
[i
].name
;
2344 addr
= parse_and_eval_address (val
);
2346 /* Here we store the section offsets in the order they were
2347 entered on the command line. */
2348 section_addrs
->other
[sec_num
].name
= sec
;
2349 section_addrs
->other
[sec_num
].addr
= addr
;
2350 printf_unfiltered ("\t%s_addr = %s\n", sec
,
2351 paddress (gdbarch
, addr
));
2354 /* The object's sections are initialized when a
2355 call is made to build_objfile_section_table (objfile).
2356 This happens in reread_symbols.
2357 At this point, we don't know what file type this is,
2358 so we can't determine what section names are valid. */
2361 if (from_tty
&& (!query ("%s", "")))
2362 error (_("Not confirmed."));
2364 symbol_file_add (filename
, from_tty
? SYMFILE_VERBOSE
: 0,
2365 section_addrs
, flags
);
2367 /* Getting new symbols may change our opinion about what is
2369 reinit_frame_cache ();
2370 do_cleanups (my_cleanups
);
2374 /* Re-read symbols if a symbol-file has changed. */
2376 reread_symbols (void)
2378 struct objfile
*objfile
;
2381 struct stat new_statbuf
;
2384 /* With the addition of shared libraries, this should be modified,
2385 the load time should be saved in the partial symbol tables, since
2386 different tables may come from different source files. FIXME.
2387 This routine should then walk down each partial symbol table
2388 and see if the symbol table that it originates from has been changed. */
2390 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2392 /* solib-sunos.c creates one objfile with obfd. */
2393 if (objfile
->obfd
== NULL
)
2396 /* Separate debug objfiles are handled in the main objfile. */
2397 if (objfile
->separate_debug_objfile_backlink
)
2400 /* If this object is from an archive (what you usually create with
2401 `ar', often called a `static library' on most systems, though
2402 a `shared library' on AIX is also an archive), then you should
2403 stat on the archive name, not member name. */
2404 if (objfile
->obfd
->my_archive
)
2405 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2407 res
= stat (objfile
->name
, &new_statbuf
);
2410 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2411 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2415 new_modtime
= new_statbuf
.st_mtime
;
2416 if (new_modtime
!= objfile
->mtime
)
2418 struct cleanup
*old_cleanups
;
2419 struct section_offsets
*offsets
;
2421 char *obfd_filename
;
2423 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2426 /* There are various functions like symbol_file_add,
2427 symfile_bfd_open, syms_from_objfile, etc., which might
2428 appear to do what we want. But they have various other
2429 effects which we *don't* want. So we just do stuff
2430 ourselves. We don't worry about mapped files (for one thing,
2431 any mapped file will be out of date). */
2433 /* If we get an error, blow away this objfile (not sure if
2434 that is the correct response for things like shared
2436 old_cleanups
= make_cleanup_free_objfile (objfile
);
2437 /* We need to do this whenever any symbols go away. */
2438 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2440 if (exec_bfd
!= NULL
2441 && filename_cmp (bfd_get_filename (objfile
->obfd
),
2442 bfd_get_filename (exec_bfd
)) == 0)
2444 /* Reload EXEC_BFD without asking anything. */
2446 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2449 /* Keep the calls order approx. the same as in free_objfile. */
2451 /* Free the separate debug objfiles. It will be
2452 automatically recreated by sym_read. */
2453 free_objfile_separate_debug (objfile
);
2455 /* Remove any references to this objfile in the global
2457 preserve_values (objfile
);
2459 /* Nuke all the state that we will re-read. Much of the following
2460 code which sets things to NULL really is necessary to tell
2461 other parts of GDB that there is nothing currently there.
2463 Try to keep the freeing order compatible with free_objfile. */
2465 if (objfile
->sf
!= NULL
)
2467 (*objfile
->sf
->sym_finish
) (objfile
);
2470 clear_objfile_data (objfile
);
2472 /* Clean up any state BFD has sitting around. We don't need
2473 to close the descriptor but BFD lacks a way of closing the
2474 BFD without closing the descriptor. */
2475 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2476 if (!bfd_close (objfile
->obfd
))
2477 error (_("Can't close BFD for %s: %s"), objfile
->name
,
2478 bfd_errmsg (bfd_get_error ()));
2479 objfile
->obfd
= bfd_open_maybe_remote (obfd_filename
);
2480 if (objfile
->obfd
== NULL
)
2481 error (_("Can't open %s to read symbols."), objfile
->name
);
2483 objfile
->obfd
= gdb_bfd_ref (objfile
->obfd
);
2484 /* bfd_openr sets cacheable to true, which is what we want. */
2485 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2486 error (_("Can't read symbols from %s: %s."), objfile
->name
,
2487 bfd_errmsg (bfd_get_error ()));
2489 /* Save the offsets, we will nuke them with the rest of the
2491 num_offsets
= objfile
->num_sections
;
2492 offsets
= ((struct section_offsets
*)
2493 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2494 memcpy (offsets
, objfile
->section_offsets
,
2495 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2497 /* FIXME: Do we have to free a whole linked list, or is this
2499 if (objfile
->global_psymbols
.list
)
2500 xfree (objfile
->global_psymbols
.list
);
2501 memset (&objfile
->global_psymbols
, 0,
2502 sizeof (objfile
->global_psymbols
));
2503 if (objfile
->static_psymbols
.list
)
2504 xfree (objfile
->static_psymbols
.list
);
2505 memset (&objfile
->static_psymbols
, 0,
2506 sizeof (objfile
->static_psymbols
));
2508 /* Free the obstacks for non-reusable objfiles. */
2509 psymbol_bcache_free (objfile
->psymbol_cache
);
2510 objfile
->psymbol_cache
= psymbol_bcache_init ();
2511 bcache_xfree (objfile
->macro_cache
);
2512 objfile
->macro_cache
= bcache_xmalloc (NULL
, NULL
);
2513 bcache_xfree (objfile
->filename_cache
);
2514 objfile
->filename_cache
= bcache_xmalloc (NULL
,NULL
);
2515 if (objfile
->demangled_names_hash
!= NULL
)
2517 htab_delete (objfile
->demangled_names_hash
);
2518 objfile
->demangled_names_hash
= NULL
;
2520 obstack_free (&objfile
->objfile_obstack
, 0);
2521 objfile
->sections
= NULL
;
2522 objfile
->symtabs
= NULL
;
2523 objfile
->psymtabs
= NULL
;
2524 objfile
->psymtabs_addrmap
= NULL
;
2525 objfile
->free_psymtabs
= NULL
;
2526 objfile
->template_symbols
= NULL
;
2527 objfile
->msymbols
= NULL
;
2528 objfile
->deprecated_sym_private
= NULL
;
2529 objfile
->minimal_symbol_count
= 0;
2530 memset (&objfile
->msymbol_hash
, 0,
2531 sizeof (objfile
->msymbol_hash
));
2532 memset (&objfile
->msymbol_demangled_hash
, 0,
2533 sizeof (objfile
->msymbol_demangled_hash
));
2535 /* obstack_init also initializes the obstack so it is
2536 empty. We could use obstack_specify_allocation but
2537 gdb_obstack.h specifies the alloc/dealloc
2539 obstack_init (&objfile
->objfile_obstack
);
2540 if (build_objfile_section_table (objfile
))
2542 error (_("Can't find the file sections in `%s': %s"),
2543 objfile
->name
, bfd_errmsg (bfd_get_error ()));
2545 terminate_minimal_symbol_table (objfile
);
2547 /* We use the same section offsets as from last time. I'm not
2548 sure whether that is always correct for shared libraries. */
2549 objfile
->section_offsets
= (struct section_offsets
*)
2550 obstack_alloc (&objfile
->objfile_obstack
,
2551 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2552 memcpy (objfile
->section_offsets
, offsets
,
2553 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2554 objfile
->num_sections
= num_offsets
;
2556 /* What the hell is sym_new_init for, anyway? The concept of
2557 distinguishing between the main file and additional files
2558 in this way seems rather dubious. */
2559 if (objfile
== symfile_objfile
)
2561 (*objfile
->sf
->sym_new_init
) (objfile
);
2564 (*objfile
->sf
->sym_init
) (objfile
);
2565 clear_complaints (&symfile_complaints
, 1, 1);
2566 /* Do not set flags as this is safe and we don't want to be
2568 (*objfile
->sf
->sym_read
) (objfile
, 0);
2569 if ((objfile
->flags
& OBJF_PSYMTABS_READ
) != 0)
2571 objfile
->flags
&= ~OBJF_PSYMTABS_READ
;
2572 require_partial_symbols (objfile
, 0);
2575 if (!objfile_has_symbols (objfile
))
2578 printf_unfiltered (_("(no debugging symbols found)\n"));
2582 /* We're done reading the symbol file; finish off complaints. */
2583 clear_complaints (&symfile_complaints
, 0, 1);
2585 /* Getting new symbols may change our opinion about what is
2588 reinit_frame_cache ();
2590 /* Discard cleanups as symbol reading was successful. */
2591 discard_cleanups (old_cleanups
);
2593 /* If the mtime has changed between the time we set new_modtime
2594 and now, we *want* this to be out of date, so don't call stat
2596 objfile
->mtime
= new_modtime
;
2598 init_entry_point_info (objfile
);
2604 /* Notify objfiles that we've modified objfile sections. */
2605 objfiles_changed ();
2607 clear_symtab_users (0);
2608 /* At least one objfile has changed, so we can consider that
2609 the executable we're debugging has changed too. */
2610 observer_notify_executable_changed ();
2623 static filename_language
*filename_language_table
;
2624 static int fl_table_size
, fl_table_next
;
2627 add_filename_language (char *ext
, enum language lang
)
2629 if (fl_table_next
>= fl_table_size
)
2631 fl_table_size
+= 10;
2632 filename_language_table
=
2633 xrealloc (filename_language_table
,
2634 fl_table_size
* sizeof (*filename_language_table
));
2637 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2638 filename_language_table
[fl_table_next
].lang
= lang
;
2642 static char *ext_args
;
2644 show_ext_args (struct ui_file
*file
, int from_tty
,
2645 struct cmd_list_element
*c
, const char *value
)
2647 fprintf_filtered (file
,
2648 _("Mapping between filename extension "
2649 "and source language is \"%s\".\n"),
2654 set_ext_lang_command (char *args
, int from_tty
, struct cmd_list_element
*e
)
2657 char *cp
= ext_args
;
2660 /* First arg is filename extension, starting with '.' */
2662 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2664 /* Find end of first arg. */
2665 while (*cp
&& !isspace (*cp
))
2669 error (_("'%s': two arguments required -- "
2670 "filename extension and language"),
2673 /* Null-terminate first arg. */
2676 /* Find beginning of second arg, which should be a source language. */
2677 while (*cp
&& isspace (*cp
))
2681 error (_("'%s': two arguments required -- "
2682 "filename extension and language"),
2685 /* Lookup the language from among those we know. */
2686 lang
= language_enum (cp
);
2688 /* Now lookup the filename extension: do we already know it? */
2689 for (i
= 0; i
< fl_table_next
; i
++)
2690 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2693 if (i
>= fl_table_next
)
2695 /* New file extension. */
2696 add_filename_language (ext_args
, lang
);
2700 /* Redefining a previously known filename extension. */
2703 /* query ("Really make files of type %s '%s'?", */
2704 /* ext_args, language_str (lang)); */
2706 xfree (filename_language_table
[i
].ext
);
2707 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2708 filename_language_table
[i
].lang
= lang
;
2713 info_ext_lang_command (char *args
, int from_tty
)
2717 printf_filtered (_("Filename extensions and the languages they represent:"));
2718 printf_filtered ("\n\n");
2719 for (i
= 0; i
< fl_table_next
; i
++)
2720 printf_filtered ("\t%s\t- %s\n",
2721 filename_language_table
[i
].ext
,
2722 language_str (filename_language_table
[i
].lang
));
2726 init_filename_language_table (void)
2728 if (fl_table_size
== 0) /* Protect against repetition. */
2732 filename_language_table
=
2733 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
2734 add_filename_language (".c", language_c
);
2735 add_filename_language (".d", language_d
);
2736 add_filename_language (".C", language_cplus
);
2737 add_filename_language (".cc", language_cplus
);
2738 add_filename_language (".cp", language_cplus
);
2739 add_filename_language (".cpp", language_cplus
);
2740 add_filename_language (".cxx", language_cplus
);
2741 add_filename_language (".c++", language_cplus
);
2742 add_filename_language (".java", language_java
);
2743 add_filename_language (".class", language_java
);
2744 add_filename_language (".m", language_objc
);
2745 add_filename_language (".f", language_fortran
);
2746 add_filename_language (".F", language_fortran
);
2747 add_filename_language (".for", language_fortran
);
2748 add_filename_language (".FOR", language_fortran
);
2749 add_filename_language (".ftn", language_fortran
);
2750 add_filename_language (".FTN", language_fortran
);
2751 add_filename_language (".fpp", language_fortran
);
2752 add_filename_language (".FPP", language_fortran
);
2753 add_filename_language (".f90", language_fortran
);
2754 add_filename_language (".F90", language_fortran
);
2755 add_filename_language (".f95", language_fortran
);
2756 add_filename_language (".F95", language_fortran
);
2757 add_filename_language (".f03", language_fortran
);
2758 add_filename_language (".F03", language_fortran
);
2759 add_filename_language (".f08", language_fortran
);
2760 add_filename_language (".F08", language_fortran
);
2761 add_filename_language (".s", language_asm
);
2762 add_filename_language (".sx", language_asm
);
2763 add_filename_language (".S", language_asm
);
2764 add_filename_language (".pas", language_pascal
);
2765 add_filename_language (".p", language_pascal
);
2766 add_filename_language (".pp", language_pascal
);
2767 add_filename_language (".adb", language_ada
);
2768 add_filename_language (".ads", language_ada
);
2769 add_filename_language (".a", language_ada
);
2770 add_filename_language (".ada", language_ada
);
2771 add_filename_language (".dg", language_ada
);
2776 deduce_language_from_filename (const char *filename
)
2781 if (filename
!= NULL
)
2782 if ((cp
= strrchr (filename
, '.')) != NULL
)
2783 for (i
= 0; i
< fl_table_next
; i
++)
2784 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2785 return filename_language_table
[i
].lang
;
2787 return language_unknown
;
2792 Allocate and partly initialize a new symbol table. Return a pointer
2793 to it. error() if no space.
2795 Caller must set these fields:
2804 allocate_symtab (const char *filename
, struct objfile
*objfile
)
2806 struct symtab
*symtab
;
2808 symtab
= (struct symtab
*)
2809 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symtab
));
2810 memset (symtab
, 0, sizeof (*symtab
));
2811 symtab
->filename
= (char *) bcache (filename
, strlen (filename
) + 1,
2812 objfile
->filename_cache
);
2813 symtab
->fullname
= NULL
;
2814 symtab
->language
= deduce_language_from_filename (filename
);
2815 symtab
->debugformat
= "unknown";
2817 /* Hook it to the objfile it comes from. */
2819 symtab
->objfile
= objfile
;
2820 symtab
->next
= objfile
->symtabs
;
2821 objfile
->symtabs
= symtab
;
2827 /* Reset all data structures in gdb which may contain references to symbol
2828 table data. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
2831 clear_symtab_users (int add_flags
)
2833 /* Someday, we should do better than this, by only blowing away
2834 the things that really need to be blown. */
2836 /* Clear the "current" symtab first, because it is no longer valid.
2837 breakpoint_re_set may try to access the current symtab. */
2838 clear_current_source_symtab_and_line ();
2841 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
2842 breakpoint_re_set ();
2843 clear_last_displayed_sal ();
2844 clear_pc_function_cache ();
2845 observer_notify_new_objfile (NULL
);
2847 /* Clear globals which might have pointed into a removed objfile.
2848 FIXME: It's not clear which of these are supposed to persist
2849 between expressions and which ought to be reset each time. */
2850 expression_context_block
= NULL
;
2851 innermost_block
= NULL
;
2853 /* Varobj may refer to old symbols, perform a cleanup. */
2854 varobj_invalidate ();
2859 clear_symtab_users_cleanup (void *ignore
)
2861 clear_symtab_users (0);
2865 The following code implements an abstraction for debugging overlay sections.
2867 The target model is as follows:
2868 1) The gnu linker will permit multiple sections to be mapped into the
2869 same VMA, each with its own unique LMA (or load address).
2870 2) It is assumed that some runtime mechanism exists for mapping the
2871 sections, one by one, from the load address into the VMA address.
2872 3) This code provides a mechanism for gdb to keep track of which
2873 sections should be considered to be mapped from the VMA to the LMA.
2874 This information is used for symbol lookup, and memory read/write.
2875 For instance, if a section has been mapped then its contents
2876 should be read from the VMA, otherwise from the LMA.
2878 Two levels of debugger support for overlays are available. One is
2879 "manual", in which the debugger relies on the user to tell it which
2880 overlays are currently mapped. This level of support is
2881 implemented entirely in the core debugger, and the information about
2882 whether a section is mapped is kept in the objfile->obj_section table.
2884 The second level of support is "automatic", and is only available if
2885 the target-specific code provides functionality to read the target's
2886 overlay mapping table, and translate its contents for the debugger
2887 (by updating the mapped state information in the obj_section tables).
2889 The interface is as follows:
2891 overlay map <name> -- tell gdb to consider this section mapped
2892 overlay unmap <name> -- tell gdb to consider this section unmapped
2893 overlay list -- list the sections that GDB thinks are mapped
2894 overlay read-target -- get the target's state of what's mapped
2895 overlay off/manual/auto -- set overlay debugging state
2896 Functional interface:
2897 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2898 section, return that section.
2899 find_pc_overlay(pc): find any overlay section that contains
2900 the pc, either in its VMA or its LMA
2901 section_is_mapped(sect): true if overlay is marked as mapped
2902 section_is_overlay(sect): true if section's VMA != LMA
2903 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2904 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2905 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2906 overlay_mapped_address(...): map an address from section's LMA to VMA
2907 overlay_unmapped_address(...): map an address from section's VMA to LMA
2908 symbol_overlayed_address(...): Return a "current" address for symbol:
2909 either in VMA or LMA depending on whether
2910 the symbol's section is currently mapped. */
2912 /* Overlay debugging state: */
2914 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2915 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state. */
2917 /* Function: section_is_overlay (SECTION)
2918 Returns true if SECTION has VMA not equal to LMA, ie.
2919 SECTION is loaded at an address different from where it will "run". */
2922 section_is_overlay (struct obj_section
*section
)
2924 if (overlay_debugging
&& section
)
2926 bfd
*abfd
= section
->objfile
->obfd
;
2927 asection
*bfd_section
= section
->the_bfd_section
;
2929 if (bfd_section_lma (abfd
, bfd_section
) != 0
2930 && bfd_section_lma (abfd
, bfd_section
)
2931 != bfd_section_vma (abfd
, bfd_section
))
2938 /* Function: overlay_invalidate_all (void)
2939 Invalidate the mapped state of all overlay sections (mark it as stale). */
2942 overlay_invalidate_all (void)
2944 struct objfile
*objfile
;
2945 struct obj_section
*sect
;
2947 ALL_OBJSECTIONS (objfile
, sect
)
2948 if (section_is_overlay (sect
))
2949 sect
->ovly_mapped
= -1;
2952 /* Function: section_is_mapped (SECTION)
2953 Returns true if section is an overlay, and is currently mapped.
2955 Access to the ovly_mapped flag is restricted to this function, so
2956 that we can do automatic update. If the global flag
2957 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2958 overlay_invalidate_all. If the mapped state of the particular
2959 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2962 section_is_mapped (struct obj_section
*osect
)
2964 struct gdbarch
*gdbarch
;
2966 if (osect
== 0 || !section_is_overlay (osect
))
2969 switch (overlay_debugging
)
2973 return 0; /* overlay debugging off */
2974 case ovly_auto
: /* overlay debugging automatic */
2975 /* Unles there is a gdbarch_overlay_update function,
2976 there's really nothing useful to do here (can't really go auto). */
2977 gdbarch
= get_objfile_arch (osect
->objfile
);
2978 if (gdbarch_overlay_update_p (gdbarch
))
2980 if (overlay_cache_invalid
)
2982 overlay_invalidate_all ();
2983 overlay_cache_invalid
= 0;
2985 if (osect
->ovly_mapped
== -1)
2986 gdbarch_overlay_update (gdbarch
, osect
);
2988 /* fall thru to manual case */
2989 case ovly_on
: /* overlay debugging manual */
2990 return osect
->ovly_mapped
== 1;
2994 /* Function: pc_in_unmapped_range
2995 If PC falls into the lma range of SECTION, return true, else false. */
2998 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3000 if (section_is_overlay (section
))
3002 bfd
*abfd
= section
->objfile
->obfd
;
3003 asection
*bfd_section
= section
->the_bfd_section
;
3005 /* We assume the LMA is relocated by the same offset as the VMA. */
3006 bfd_vma size
= bfd_get_section_size (bfd_section
);
3007 CORE_ADDR offset
= obj_section_offset (section
);
3009 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
3010 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
3017 /* Function: pc_in_mapped_range
3018 If PC falls into the vma range of SECTION, return true, else false. */
3021 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3023 if (section_is_overlay (section
))
3025 if (obj_section_addr (section
) <= pc
3026 && pc
< obj_section_endaddr (section
))
3034 /* Return true if the mapped ranges of sections A and B overlap, false
3037 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
3039 CORE_ADDR a_start
= obj_section_addr (a
);
3040 CORE_ADDR a_end
= obj_section_endaddr (a
);
3041 CORE_ADDR b_start
= obj_section_addr (b
);
3042 CORE_ADDR b_end
= obj_section_endaddr (b
);
3044 return (a_start
< b_end
&& b_start
< a_end
);
3047 /* Function: overlay_unmapped_address (PC, SECTION)
3048 Returns the address corresponding to PC in the unmapped (load) range.
3049 May be the same as PC. */
3052 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3054 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
3056 bfd
*abfd
= section
->objfile
->obfd
;
3057 asection
*bfd_section
= section
->the_bfd_section
;
3059 return pc
+ bfd_section_lma (abfd
, bfd_section
)
3060 - bfd_section_vma (abfd
, bfd_section
);
3066 /* Function: overlay_mapped_address (PC, SECTION)
3067 Returns the address corresponding to PC in the mapped (runtime) range.
3068 May be the same as PC. */
3071 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3073 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3075 bfd
*abfd
= section
->objfile
->obfd
;
3076 asection
*bfd_section
= section
->the_bfd_section
;
3078 return pc
+ bfd_section_vma (abfd
, bfd_section
)
3079 - bfd_section_lma (abfd
, bfd_section
);
3086 /* Function: symbol_overlayed_address
3087 Return one of two addresses (relative to the VMA or to the LMA),
3088 depending on whether the section is mapped or not. */
3091 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3093 if (overlay_debugging
)
3095 /* If the symbol has no section, just return its regular address. */
3098 /* If the symbol's section is not an overlay, just return its
3100 if (!section_is_overlay (section
))
3102 /* If the symbol's section is mapped, just return its address. */
3103 if (section_is_mapped (section
))
3106 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3107 * then return its LOADED address rather than its vma address!!
3109 return overlay_unmapped_address (address
, section
);
3114 /* Function: find_pc_overlay (PC)
3115 Return the best-match overlay section for PC:
3116 If PC matches a mapped overlay section's VMA, return that section.
3117 Else if PC matches an unmapped section's VMA, return that section.
3118 Else if PC matches an unmapped section's LMA, return that section. */
3120 struct obj_section
*
3121 find_pc_overlay (CORE_ADDR pc
)
3123 struct objfile
*objfile
;
3124 struct obj_section
*osect
, *best_match
= NULL
;
3126 if (overlay_debugging
)
3127 ALL_OBJSECTIONS (objfile
, osect
)
3128 if (section_is_overlay (osect
))
3130 if (pc_in_mapped_range (pc
, osect
))
3132 if (section_is_mapped (osect
))
3137 else if (pc_in_unmapped_range (pc
, osect
))
3143 /* Function: find_pc_mapped_section (PC)
3144 If PC falls into the VMA address range of an overlay section that is
3145 currently marked as MAPPED, return that section. Else return NULL. */
3147 struct obj_section
*
3148 find_pc_mapped_section (CORE_ADDR pc
)
3150 struct objfile
*objfile
;
3151 struct obj_section
*osect
;
3153 if (overlay_debugging
)
3154 ALL_OBJSECTIONS (objfile
, osect
)
3155 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3161 /* Function: list_overlays_command
3162 Print a list of mapped sections and their PC ranges. */
3165 list_overlays_command (char *args
, int from_tty
)
3168 struct objfile
*objfile
;
3169 struct obj_section
*osect
;
3171 if (overlay_debugging
)
3172 ALL_OBJSECTIONS (objfile
, osect
)
3173 if (section_is_mapped (osect
))
3175 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3180 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3181 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3182 size
= bfd_get_section_size (osect
->the_bfd_section
);
3183 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3185 printf_filtered ("Section %s, loaded at ", name
);
3186 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3187 puts_filtered (" - ");
3188 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3189 printf_filtered (", mapped at ");
3190 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3191 puts_filtered (" - ");
3192 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3193 puts_filtered ("\n");
3198 printf_filtered (_("No sections are mapped.\n"));
3201 /* Function: map_overlay_command
3202 Mark the named section as mapped (ie. residing at its VMA address). */
3205 map_overlay_command (char *args
, int from_tty
)
3207 struct objfile
*objfile
, *objfile2
;
3208 struct obj_section
*sec
, *sec2
;
3210 if (!overlay_debugging
)
3211 error (_("Overlay debugging not enabled. Use "
3212 "either the 'overlay auto' or\n"
3213 "the 'overlay manual' command."));
3215 if (args
== 0 || *args
== 0)
3216 error (_("Argument required: name of an overlay section"));
3218 /* First, find a section matching the user supplied argument. */
3219 ALL_OBJSECTIONS (objfile
, sec
)
3220 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3222 /* Now, check to see if the section is an overlay. */
3223 if (!section_is_overlay (sec
))
3224 continue; /* not an overlay section */
3226 /* Mark the overlay as "mapped". */
3227 sec
->ovly_mapped
= 1;
3229 /* Next, make a pass and unmap any sections that are
3230 overlapped by this new section: */
3231 ALL_OBJSECTIONS (objfile2
, sec2
)
3232 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
, sec2
))
3235 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3236 bfd_section_name (objfile
->obfd
,
3237 sec2
->the_bfd_section
));
3238 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2. */
3242 error (_("No overlay section called %s"), args
);
3245 /* Function: unmap_overlay_command
3246 Mark the overlay section as unmapped
3247 (ie. resident in its LMA address range, rather than the VMA range). */
3250 unmap_overlay_command (char *args
, int from_tty
)
3252 struct objfile
*objfile
;
3253 struct obj_section
*sec
;
3255 if (!overlay_debugging
)
3256 error (_("Overlay debugging not enabled. "
3257 "Use either the 'overlay auto' or\n"
3258 "the 'overlay manual' command."));
3260 if (args
== 0 || *args
== 0)
3261 error (_("Argument required: name of an overlay section"));
3263 /* First, find a section matching the user supplied argument. */
3264 ALL_OBJSECTIONS (objfile
, sec
)
3265 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3267 if (!sec
->ovly_mapped
)
3268 error (_("Section %s is not mapped"), args
);
3269 sec
->ovly_mapped
= 0;
3272 error (_("No overlay section called %s"), args
);
3275 /* Function: overlay_auto_command
3276 A utility command to turn on overlay debugging.
3277 Possibly this should be done via a set/show command. */
3280 overlay_auto_command (char *args
, int from_tty
)
3282 overlay_debugging
= ovly_auto
;
3283 enable_overlay_breakpoints ();
3285 printf_unfiltered (_("Automatic overlay debugging enabled."));
3288 /* Function: overlay_manual_command
3289 A utility command to turn on overlay debugging.
3290 Possibly this should be done via a set/show command. */
3293 overlay_manual_command (char *args
, int from_tty
)
3295 overlay_debugging
= ovly_on
;
3296 disable_overlay_breakpoints ();
3298 printf_unfiltered (_("Overlay debugging enabled."));
3301 /* Function: overlay_off_command
3302 A utility command to turn on overlay debugging.
3303 Possibly this should be done via a set/show command. */
3306 overlay_off_command (char *args
, int from_tty
)
3308 overlay_debugging
= ovly_off
;
3309 disable_overlay_breakpoints ();
3311 printf_unfiltered (_("Overlay debugging disabled."));
3315 overlay_load_command (char *args
, int from_tty
)
3317 struct gdbarch
*gdbarch
= get_current_arch ();
3319 if (gdbarch_overlay_update_p (gdbarch
))
3320 gdbarch_overlay_update (gdbarch
, NULL
);
3322 error (_("This target does not know how to read its overlay state."));
3325 /* Function: overlay_command
3326 A place-holder for a mis-typed command. */
3328 /* Command list chain containing all defined "overlay" subcommands. */
3329 struct cmd_list_element
*overlaylist
;
3332 overlay_command (char *args
, int from_tty
)
3335 ("\"overlay\" must be followed by the name of an overlay command.\n");
3336 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3340 /* Target Overlays for the "Simplest" overlay manager:
3342 This is GDB's default target overlay layer. It works with the
3343 minimal overlay manager supplied as an example by Cygnus. The
3344 entry point is via a function pointer "gdbarch_overlay_update",
3345 so targets that use a different runtime overlay manager can
3346 substitute their own overlay_update function and take over the
3349 The overlay_update function pokes around in the target's data structures
3350 to see what overlays are mapped, and updates GDB's overlay mapping with
3353 In this simple implementation, the target data structures are as follows:
3354 unsigned _novlys; /# number of overlay sections #/
3355 unsigned _ovly_table[_novlys][4] = {
3356 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3357 {..., ..., ..., ...},
3359 unsigned _novly_regions; /# number of overlay regions #/
3360 unsigned _ovly_region_table[_novly_regions][3] = {
3361 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3364 These functions will attempt to update GDB's mappedness state in the
3365 symbol section table, based on the target's mappedness state.
3367 To do this, we keep a cached copy of the target's _ovly_table, and
3368 attempt to detect when the cached copy is invalidated. The main
3369 entry point is "simple_overlay_update(SECT), which looks up SECT in
3370 the cached table and re-reads only the entry for that section from
3371 the target (whenever possible). */
3373 /* Cached, dynamically allocated copies of the target data structures: */
3374 static unsigned (*cache_ovly_table
)[4] = 0;
3375 static unsigned cache_novlys
= 0;
3376 static CORE_ADDR cache_ovly_table_base
= 0;
3379 VMA
, SIZE
, LMA
, MAPPED
3382 /* Throw away the cached copy of _ovly_table. */
3384 simple_free_overlay_table (void)
3386 if (cache_ovly_table
)
3387 xfree (cache_ovly_table
);
3389 cache_ovly_table
= NULL
;
3390 cache_ovly_table_base
= 0;
3393 /* Read an array of ints of size SIZE from the target into a local buffer.
3394 Convert to host order. int LEN is number of ints. */
3396 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3397 int len
, int size
, enum bfd_endian byte_order
)
3399 /* FIXME (alloca): Not safe if array is very large. */
3400 gdb_byte
*buf
= alloca (len
* size
);
3403 read_memory (memaddr
, buf
, len
* size
);
3404 for (i
= 0; i
< len
; i
++)
3405 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3408 /* Find and grab a copy of the target _ovly_table
3409 (and _novlys, which is needed for the table's size). */
3411 simple_read_overlay_table (void)
3413 struct minimal_symbol
*novlys_msym
, *ovly_table_msym
;
3414 struct gdbarch
*gdbarch
;
3416 enum bfd_endian byte_order
;
3418 simple_free_overlay_table ();
3419 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3422 error (_("Error reading inferior's overlay table: "
3423 "couldn't find `_novlys' variable\n"
3424 "in inferior. Use `overlay manual' mode."));
3428 ovly_table_msym
= lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3429 if (! ovly_table_msym
)
3431 error (_("Error reading inferior's overlay table: couldn't find "
3432 "`_ovly_table' array\n"
3433 "in inferior. Use `overlay manual' mode."));
3437 gdbarch
= get_objfile_arch (msymbol_objfile (ovly_table_msym
));
3438 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3439 byte_order
= gdbarch_byte_order (gdbarch
);
3441 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
),
3444 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3445 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3446 read_target_long_array (cache_ovly_table_base
,
3447 (unsigned int *) cache_ovly_table
,
3448 cache_novlys
* 4, word_size
, byte_order
);
3450 return 1; /* SUCCESS */
3453 /* Function: simple_overlay_update_1
3454 A helper function for simple_overlay_update. Assuming a cached copy
3455 of _ovly_table exists, look through it to find an entry whose vma,
3456 lma and size match those of OSECT. Re-read the entry and make sure
3457 it still matches OSECT (else the table may no longer be valid).
3458 Set OSECT's mapped state to match the entry. Return: 1 for
3459 success, 0 for failure. */
3462 simple_overlay_update_1 (struct obj_section
*osect
)
3465 bfd
*obfd
= osect
->objfile
->obfd
;
3466 asection
*bsect
= osect
->the_bfd_section
;
3467 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3468 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3469 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3471 size
= bfd_get_section_size (osect
->the_bfd_section
);
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 */ )
3477 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3478 (unsigned int *) cache_ovly_table
[i
],
3479 4, word_size
, byte_order
);
3480 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3481 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3482 /* && cache_ovly_table[i][SIZE] == size */ )
3484 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3487 else /* Warning! Warning! Target's ovly table has changed! */
3493 /* Function: simple_overlay_update
3494 If OSECT is NULL, then update all sections' mapped state
3495 (after re-reading the entire target _ovly_table).
3496 If OSECT is non-NULL, then try to find a matching entry in the
3497 cached ovly_table and update only OSECT's mapped state.
3498 If a cached entry can't be found or the cache isn't valid, then
3499 re-read the entire cache, and go ahead and update all sections. */
3502 simple_overlay_update (struct obj_section
*osect
)
3504 struct objfile
*objfile
;
3506 /* Were we given an osect to look up? NULL means do all of them. */
3508 /* Have we got a cached copy of the target's overlay table? */
3509 if (cache_ovly_table
!= NULL
)
3511 /* Does its cached location match what's currently in the
3513 struct minimal_symbol
*minsym
3514 = lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3517 error (_("Error reading inferior's overlay table: couldn't "
3518 "find `_ovly_table' array\n"
3519 "in inferior. Use `overlay manual' mode."));
3521 if (cache_ovly_table_base
== SYMBOL_VALUE_ADDRESS (minsym
))
3522 /* Then go ahead and try to look up this single section in
3524 if (simple_overlay_update_1 (osect
))
3525 /* Found it! We're done. */
3529 /* Cached table no good: need to read the entire table anew.
3530 Or else we want all the sections, in which case it's actually
3531 more efficient to read the whole table in one block anyway. */
3533 if (! simple_read_overlay_table ())
3536 /* Now may as well update all sections, even if only one was requested. */
3537 ALL_OBJSECTIONS (objfile
, osect
)
3538 if (section_is_overlay (osect
))
3541 bfd
*obfd
= osect
->objfile
->obfd
;
3542 asection
*bsect
= osect
->the_bfd_section
;
3544 size
= bfd_get_section_size (bsect
);
3545 for (i
= 0; i
< cache_novlys
; i
++)
3546 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3547 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3548 /* && cache_ovly_table[i][SIZE] == size */ )
3549 { /* obj_section matches i'th entry in ovly_table. */
3550 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3551 break; /* finished with inner for loop: break out. */
3556 /* Set the output sections and output offsets for section SECTP in
3557 ABFD. The relocation code in BFD will read these offsets, so we
3558 need to be sure they're initialized. We map each section to itself,
3559 with no offset; this means that SECTP->vma will be honored. */
3562 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3564 sectp
->output_section
= sectp
;
3565 sectp
->output_offset
= 0;
3568 /* Default implementation for sym_relocate. */
3572 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3575 bfd
*abfd
= objfile
->obfd
;
3577 /* We're only interested in sections with relocation
3579 if ((sectp
->flags
& SEC_RELOC
) == 0)
3582 /* We will handle section offsets properly elsewhere, so relocate as if
3583 all sections begin at 0. */
3584 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3586 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3589 /* Relocate the contents of a debug section SECTP in ABFD. The
3590 contents are stored in BUF if it is non-NULL, or returned in a
3591 malloc'd buffer otherwise.
3593 For some platforms and debug info formats, shared libraries contain
3594 relocations against the debug sections (particularly for DWARF-2;
3595 one affected platform is PowerPC GNU/Linux, although it depends on
3596 the version of the linker in use). Also, ELF object files naturally
3597 have unresolved relocations for their debug sections. We need to apply
3598 the relocations in order to get the locations of symbols correct.
3599 Another example that may require relocation processing, is the
3600 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3604 symfile_relocate_debug_section (struct objfile
*objfile
,
3605 asection
*sectp
, bfd_byte
*buf
)
3607 gdb_assert (objfile
->sf
->sym_relocate
);
3609 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3612 struct symfile_segment_data
*
3613 get_symfile_segment_data (bfd
*abfd
)
3615 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3620 return sf
->sym_segments (abfd
);
3624 free_symfile_segment_data (struct symfile_segment_data
*data
)
3626 xfree (data
->segment_bases
);
3627 xfree (data
->segment_sizes
);
3628 xfree (data
->segment_info
);
3634 - DATA, containing segment addresses from the object file ABFD, and
3635 the mapping from ABFD's sections onto the segments that own them,
3637 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3638 segment addresses reported by the target,
3639 store the appropriate offsets for each section in OFFSETS.
3641 If there are fewer entries in SEGMENT_BASES than there are segments
3642 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3644 If there are more entries, then ignore the extra. The target may
3645 not be able to distinguish between an empty data segment and a
3646 missing data segment; a missing text segment is less plausible. */
3648 symfile_map_offsets_to_segments (bfd
*abfd
, struct symfile_segment_data
*data
,
3649 struct section_offsets
*offsets
,
3650 int num_segment_bases
,
3651 const CORE_ADDR
*segment_bases
)
3656 /* It doesn't make sense to call this function unless you have some
3657 segment base addresses. */
3658 gdb_assert (num_segment_bases
> 0);
3660 /* If we do not have segment mappings for the object file, we
3661 can not relocate it by segments. */
3662 gdb_assert (data
!= NULL
);
3663 gdb_assert (data
->num_segments
> 0);
3665 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3667 int which
= data
->segment_info
[i
];
3669 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
3671 /* Don't bother computing offsets for sections that aren't
3672 loaded as part of any segment. */
3676 /* Use the last SEGMENT_BASES entry as the address of any extra
3677 segments mentioned in DATA->segment_info. */
3678 if (which
> num_segment_bases
)
3679 which
= num_segment_bases
;
3681 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
3682 - data
->segment_bases
[which
- 1]);
3689 symfile_find_segment_sections (struct objfile
*objfile
)
3691 bfd
*abfd
= objfile
->obfd
;
3694 struct symfile_segment_data
*data
;
3696 data
= get_symfile_segment_data (objfile
->obfd
);
3700 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
3702 free_symfile_segment_data (data
);
3706 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3708 int which
= data
->segment_info
[i
];
3712 if (objfile
->sect_index_text
== -1)
3713 objfile
->sect_index_text
= sect
->index
;
3715 if (objfile
->sect_index_rodata
== -1)
3716 objfile
->sect_index_rodata
= sect
->index
;
3718 else if (which
== 2)
3720 if (objfile
->sect_index_data
== -1)
3721 objfile
->sect_index_data
= sect
->index
;
3723 if (objfile
->sect_index_bss
== -1)
3724 objfile
->sect_index_bss
= sect
->index
;
3728 free_symfile_segment_data (data
);
3732 _initialize_symfile (void)
3734 struct cmd_list_element
*c
;
3736 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3737 Load symbol table from executable file FILE.\n\
3738 The `file' command can also load symbol tables, as well as setting the file\n\
3739 to execute."), &cmdlist
);
3740 set_cmd_completer (c
, filename_completer
);
3742 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3743 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3744 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR>\
3745 ...]\nADDR is the starting address of the file's text.\n\
3746 The optional arguments are section-name section-address pairs and\n\
3747 should be specified if the data and bss segments are not contiguous\n\
3748 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3750 set_cmd_completer (c
, filename_completer
);
3752 c
= add_cmd ("load", class_files
, load_command
, _("\
3753 Dynamically load FILE into the running program, and record its symbols\n\
3754 for access from GDB.\n\
3755 A load OFFSET may also be given."), &cmdlist
);
3756 set_cmd_completer (c
, filename_completer
);
3758 add_setshow_boolean_cmd ("symbol-reloading", class_support
,
3759 &symbol_reloading
, _("\
3760 Set dynamic symbol table reloading multiple times in one run."), _("\
3761 Show dynamic symbol table reloading multiple times in one run."), NULL
,
3763 show_symbol_reloading
,
3764 &setlist
, &showlist
);
3766 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3767 _("Commands for debugging overlays."), &overlaylist
,
3768 "overlay ", 0, &cmdlist
);
3770 add_com_alias ("ovly", "overlay", class_alias
, 1);
3771 add_com_alias ("ov", "overlay", class_alias
, 1);
3773 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3774 _("Assert that an overlay section is mapped."), &overlaylist
);
3776 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3777 _("Assert that an overlay section is unmapped."), &overlaylist
);
3779 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3780 _("List mappings of overlay sections."), &overlaylist
);
3782 add_cmd ("manual", class_support
, overlay_manual_command
,
3783 _("Enable overlay debugging."), &overlaylist
);
3784 add_cmd ("off", class_support
, overlay_off_command
,
3785 _("Disable overlay debugging."), &overlaylist
);
3786 add_cmd ("auto", class_support
, overlay_auto_command
,
3787 _("Enable automatic overlay debugging."), &overlaylist
);
3788 add_cmd ("load-target", class_support
, overlay_load_command
,
3789 _("Read the overlay mapping state from the target."), &overlaylist
);
3791 /* Filename extension to source language lookup table: */
3792 init_filename_language_table ();
3793 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3795 Set mapping between filename extension and source language."), _("\
3796 Show mapping between filename extension and source language."), _("\
3797 Usage: set extension-language .foo bar"),
3798 set_ext_lang_command
,
3800 &setlist
, &showlist
);
3802 add_info ("extensions", info_ext_lang_command
,
3803 _("All filename extensions associated with a source language."));
3805 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3806 &debug_file_directory
, _("\
3807 Set the directories where separate debug symbols are searched for."), _("\
3808 Show the directories where separate debug symbols are searched for."), _("\
3809 Separate debug symbols are first searched for in the same\n\
3810 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3811 and lastly at the path of the directory of the binary with\n\
3812 each global debug-file-directory component prepended."),
3814 show_debug_file_directory
,
3815 &setlist
, &showlist
);