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
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/>. */
36 #include "breakpoint.h"
38 #include "complaints.h"
40 #include "inferior.h" /* for write_pc */
41 #include "filenames.h" /* for DOSish file names */
42 #include "gdb-stabs.h"
43 #include "gdb_obstack.h"
44 #include "completer.h"
47 #include "readline/readline.h"
48 #include "gdb_assert.h"
52 #include "parser-defs.h"
58 #include <sys/types.h>
60 #include "gdb_string.h"
67 int (*deprecated_ui_load_progress_hook
) (const char *section
, unsigned long num
);
68 void (*deprecated_show_load_progress
) (const char *section
,
69 unsigned long section_sent
,
70 unsigned long section_size
,
71 unsigned long total_sent
,
72 unsigned long total_size
);
73 void (*deprecated_pre_add_symbol_hook
) (const char *);
74 void (*deprecated_post_add_symbol_hook
) (void);
76 static void clear_symtab_users_cleanup (void *ignore
);
78 /* Global variables owned by this file */
79 int readnow_symbol_files
; /* Read full symbols immediately */
81 /* External variables and functions referenced. */
83 extern void report_transfer_performance (unsigned long, time_t, time_t);
85 /* Functions this file defines */
88 static int simple_read_overlay_region_table (void);
89 static void simple_free_overlay_region_table (void);
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 static void add_shared_symbol_files_command (char *, int);
100 static void reread_separate_symbols (struct objfile
*objfile
);
102 static void cashier_psymtab (struct partial_symtab
*);
104 bfd
*symfile_bfd_open (char *);
106 int get_section_index (struct objfile
*, char *);
108 static struct sym_fns
*find_sym_fns (bfd
*);
110 static void decrement_reading_symtab (void *);
112 static void overlay_invalidate_all (void);
114 void list_overlays_command (char *, int);
116 void map_overlay_command (char *, int);
118 void unmap_overlay_command (char *, int);
120 static void overlay_auto_command (char *, int);
122 static void overlay_manual_command (char *, int);
124 static void overlay_off_command (char *, int);
126 static void overlay_load_command (char *, int);
128 static void overlay_command (char *, int);
130 static void simple_free_overlay_table (void);
132 static void read_target_long_array (CORE_ADDR
, unsigned int *, int);
134 static int simple_read_overlay_table (void);
136 static int simple_overlay_update_1 (struct obj_section
*);
138 static void add_filename_language (char *ext
, enum language lang
);
140 static void info_ext_lang_command (char *args
, int from_tty
);
142 static char *find_separate_debug_file (struct objfile
*objfile
);
144 static void init_filename_language_table (void);
146 static void symfile_find_segment_sections (struct objfile
*objfile
);
148 void _initialize_symfile (void);
150 /* List of all available sym_fns. On gdb startup, each object file reader
151 calls add_symtab_fns() to register information on each format it is
154 static struct sym_fns
*symtab_fns
= NULL
;
156 /* Flag for whether user will be reloading symbols multiple times.
157 Defaults to ON for VxWorks, otherwise OFF. */
159 #ifdef SYMBOL_RELOADING_DEFAULT
160 int symbol_reloading
= SYMBOL_RELOADING_DEFAULT
;
162 int symbol_reloading
= 0;
165 show_symbol_reloading (struct ui_file
*file
, int from_tty
,
166 struct cmd_list_element
*c
, const char *value
)
168 fprintf_filtered (file
, _("\
169 Dynamic symbol table reloading multiple times in one run is %s.\n"),
173 /* If non-zero, gdb will notify the user when it is loading symbols
174 from a file. This is almost always what users will want to have happen;
175 but for programs with lots of dynamically linked libraries, the output
176 can be more noise than signal. */
178 int print_symbol_loading
= 1;
180 /* If non-zero, shared library symbols will be added automatically
181 when the inferior is created, new libraries are loaded, or when
182 attaching to the inferior. This is almost always what users will
183 want to have happen; but for very large programs, the startup time
184 will be excessive, and so if this is a problem, the user can clear
185 this flag and then add the shared library symbols as needed. Note
186 that there is a potential for confusion, since if the shared
187 library symbols are not loaded, commands like "info fun" will *not*
188 report all the functions that are actually present. */
190 int auto_solib_add
= 1;
192 /* For systems that support it, a threshold size in megabytes. If
193 automatically adding a new library's symbol table to those already
194 known to the debugger would cause the total shared library symbol
195 size to exceed this threshhold, then the shlib's symbols are not
196 added. The threshold is ignored if the user explicitly asks for a
197 shlib to be added, such as when using the "sharedlibrary"
200 int auto_solib_limit
;
203 /* This compares two partial symbols by names, using strcmp_iw_ordered
204 for the comparison. */
207 compare_psymbols (const void *s1p
, const void *s2p
)
209 struct partial_symbol
*const *s1
= s1p
;
210 struct partial_symbol
*const *s2
= s2p
;
212 return strcmp_iw_ordered (SYMBOL_SEARCH_NAME (*s1
),
213 SYMBOL_SEARCH_NAME (*s2
));
217 sort_pst_symbols (struct partial_symtab
*pst
)
219 /* Sort the global list; don't sort the static list */
221 qsort (pst
->objfile
->global_psymbols
.list
+ pst
->globals_offset
,
222 pst
->n_global_syms
, sizeof (struct partial_symbol
*),
226 /* Make a null terminated copy of the string at PTR with SIZE characters in
227 the obstack pointed to by OBSTACKP . Returns the address of the copy.
228 Note that the string at PTR does not have to be null terminated, I.E. it
229 may be part of a larger string and we are only saving a substring. */
232 obsavestring (const char *ptr
, int size
, struct obstack
*obstackp
)
234 char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
235 /* Open-coded memcpy--saves function call time. These strings are usually
236 short. FIXME: Is this really still true with a compiler that can
239 const char *p1
= ptr
;
241 const char *end
= ptr
+ size
;
249 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
250 in the obstack pointed to by OBSTACKP. */
253 obconcat (struct obstack
*obstackp
, const char *s1
, const char *s2
,
256 int len
= strlen (s1
) + strlen (s2
) + strlen (s3
) + 1;
257 char *val
= (char *) obstack_alloc (obstackp
, len
);
264 /* True if we are nested inside psymtab_to_symtab. */
266 int currently_reading_symtab
= 0;
269 decrement_reading_symtab (void *dummy
)
271 currently_reading_symtab
--;
274 /* Get the symbol table that corresponds to a partial_symtab.
275 This is fast after the first time you do it. In fact, there
276 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
280 psymtab_to_symtab (struct partial_symtab
*pst
)
282 /* If it's been looked up before, return it. */
286 /* If it has not yet been read in, read it. */
289 struct cleanup
*back_to
= make_cleanup (decrement_reading_symtab
, NULL
);
290 currently_reading_symtab
++;
291 (*pst
->read_symtab
) (pst
);
292 do_cleanups (back_to
);
298 /* Remember the lowest-addressed loadable section we've seen.
299 This function is called via bfd_map_over_sections.
301 In case of equal vmas, the section with the largest size becomes the
302 lowest-addressed loadable section.
304 If the vmas and sizes are equal, the last section is considered the
305 lowest-addressed loadable section. */
308 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
310 asection
**lowest
= (asection
**) obj
;
312 if (0 == (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
))
315 *lowest
= sect
; /* First loadable section */
316 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
317 *lowest
= sect
; /* A lower loadable section */
318 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
319 && (bfd_section_size (abfd
, (*lowest
))
320 <= bfd_section_size (abfd
, sect
)))
324 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
326 struct section_addr_info
*
327 alloc_section_addr_info (size_t num_sections
)
329 struct section_addr_info
*sap
;
332 size
= (sizeof (struct section_addr_info
)
333 + sizeof (struct other_sections
) * (num_sections
- 1));
334 sap
= (struct section_addr_info
*) xmalloc (size
);
335 memset (sap
, 0, size
);
336 sap
->num_sections
= num_sections
;
342 /* Return a freshly allocated copy of ADDRS. The section names, if
343 any, are also freshly allocated copies of those in ADDRS. */
344 struct section_addr_info
*
345 copy_section_addr_info (struct section_addr_info
*addrs
)
347 struct section_addr_info
*copy
348 = alloc_section_addr_info (addrs
->num_sections
);
351 copy
->num_sections
= addrs
->num_sections
;
352 for (i
= 0; i
< addrs
->num_sections
; i
++)
354 copy
->other
[i
].addr
= addrs
->other
[i
].addr
;
355 if (addrs
->other
[i
].name
)
356 copy
->other
[i
].name
= xstrdup (addrs
->other
[i
].name
);
358 copy
->other
[i
].name
= NULL
;
359 copy
->other
[i
].sectindex
= addrs
->other
[i
].sectindex
;
367 /* Build (allocate and populate) a section_addr_info struct from
368 an existing section table. */
370 extern struct section_addr_info
*
371 build_section_addr_info_from_section_table (const struct section_table
*start
,
372 const struct section_table
*end
)
374 struct section_addr_info
*sap
;
375 const struct section_table
*stp
;
378 sap
= alloc_section_addr_info (end
- start
);
380 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
382 if (bfd_get_section_flags (stp
->bfd
,
383 stp
->the_bfd_section
) & (SEC_ALLOC
| SEC_LOAD
)
384 && oidx
< end
- start
)
386 sap
->other
[oidx
].addr
= stp
->addr
;
387 sap
->other
[oidx
].name
388 = xstrdup (bfd_section_name (stp
->bfd
, stp
->the_bfd_section
));
389 sap
->other
[oidx
].sectindex
= stp
->the_bfd_section
->index
;
398 /* Free all memory allocated by build_section_addr_info_from_section_table. */
401 free_section_addr_info (struct section_addr_info
*sap
)
405 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
406 if (sap
->other
[idx
].name
)
407 xfree (sap
->other
[idx
].name
);
412 /* Initialize OBJFILE's sect_index_* members. */
414 init_objfile_sect_indices (struct objfile
*objfile
)
419 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
421 objfile
->sect_index_text
= sect
->index
;
423 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
425 objfile
->sect_index_data
= sect
->index
;
427 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
429 objfile
->sect_index_bss
= sect
->index
;
431 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
433 objfile
->sect_index_rodata
= sect
->index
;
435 /* This is where things get really weird... We MUST have valid
436 indices for the various sect_index_* members or gdb will abort.
437 So if for example, there is no ".text" section, we have to
438 accomodate that. First, check for a file with the standard
439 one or two segments. */
441 symfile_find_segment_sections (objfile
);
443 /* Except when explicitly adding symbol files at some address,
444 section_offsets contains nothing but zeros, so it doesn't matter
445 which slot in section_offsets the individual sect_index_* members
446 index into. So if they are all zero, it is safe to just point
447 all the currently uninitialized indices to the first slot. But
448 beware: if this is the main executable, it may be relocated
449 later, e.g. by the remote qOffsets packet, and then this will
450 be wrong! That's why we try segments first. */
452 for (i
= 0; i
< objfile
->num_sections
; i
++)
454 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
459 if (i
== objfile
->num_sections
)
461 if (objfile
->sect_index_text
== -1)
462 objfile
->sect_index_text
= 0;
463 if (objfile
->sect_index_data
== -1)
464 objfile
->sect_index_data
= 0;
465 if (objfile
->sect_index_bss
== -1)
466 objfile
->sect_index_bss
= 0;
467 if (objfile
->sect_index_rodata
== -1)
468 objfile
->sect_index_rodata
= 0;
472 /* The arguments to place_section. */
474 struct place_section_arg
476 struct section_offsets
*offsets
;
480 /* Find a unique offset to use for loadable section SECT if
481 the user did not provide an offset. */
484 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
486 struct place_section_arg
*arg
= obj
;
487 CORE_ADDR
*offsets
= arg
->offsets
->offsets
, start_addr
;
489 ULONGEST align
= ((ULONGEST
) 1) << bfd_get_section_alignment (abfd
, sect
);
491 /* We are only interested in allocated sections. */
492 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
495 /* If the user specified an offset, honor it. */
496 if (offsets
[sect
->index
] != 0)
499 /* Otherwise, let's try to find a place for the section. */
500 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
507 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
509 int indx
= cur_sec
->index
;
510 CORE_ADDR cur_offset
;
512 /* We don't need to compare against ourself. */
516 /* We can only conflict with allocated sections. */
517 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
520 /* If the section offset is 0, either the section has not been placed
521 yet, or it was the lowest section placed (in which case LOWEST
522 will be past its end). */
523 if (offsets
[indx
] == 0)
526 /* If this section would overlap us, then we must move up. */
527 if (start_addr
+ bfd_get_section_size (sect
) > offsets
[indx
]
528 && start_addr
< offsets
[indx
] + bfd_get_section_size (cur_sec
))
530 start_addr
= offsets
[indx
] + bfd_get_section_size (cur_sec
);
531 start_addr
= (start_addr
+ align
- 1) & -align
;
536 /* Otherwise, we appear to be OK. So far. */
541 offsets
[sect
->index
] = start_addr
;
542 arg
->lowest
= start_addr
+ bfd_get_section_size (sect
);
545 /* Parse the user's idea of an offset for dynamic linking, into our idea
546 of how to represent it for fast symbol reading. This is the default
547 version of the sym_fns.sym_offsets function for symbol readers that
548 don't need to do anything special. It allocates a section_offsets table
549 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
552 default_symfile_offsets (struct objfile
*objfile
,
553 struct section_addr_info
*addrs
)
557 objfile
->num_sections
= bfd_count_sections (objfile
->obfd
);
558 objfile
->section_offsets
= (struct section_offsets
*)
559 obstack_alloc (&objfile
->objfile_obstack
,
560 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
561 memset (objfile
->section_offsets
, 0,
562 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
564 /* Now calculate offsets for section that were specified by the
566 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
568 struct other_sections
*osp
;
570 osp
= &addrs
->other
[i
] ;
574 /* Record all sections in offsets */
575 /* The section_offsets in the objfile are here filled in using
577 (objfile
->section_offsets
)->offsets
[osp
->sectindex
] = osp
->addr
;
580 /* For relocatable files, all loadable sections will start at zero.
581 The zero is meaningless, so try to pick arbitrary addresses such
582 that no loadable sections overlap. This algorithm is quadratic,
583 but the number of sections in a single object file is generally
585 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
587 struct place_section_arg arg
;
588 bfd
*abfd
= objfile
->obfd
;
590 CORE_ADDR lowest
= 0;
592 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
593 /* We do not expect this to happen; just skip this step if the
594 relocatable file has a section with an assigned VMA. */
595 if (bfd_section_vma (abfd
, cur_sec
) != 0)
600 CORE_ADDR
*offsets
= objfile
->section_offsets
->offsets
;
602 /* Pick non-overlapping offsets for sections the user did not
604 arg
.offsets
= objfile
->section_offsets
;
606 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
608 /* Correctly filling in the section offsets is not quite
609 enough. Relocatable files have two properties that
610 (most) shared objects do not:
612 - Their debug information will contain relocations. Some
613 shared libraries do also, but many do not, so this can not
616 - If there are multiple code sections they will be loaded
617 at different relative addresses in memory than they are
618 in the objfile, since all sections in the file will start
621 Because GDB has very limited ability to map from an
622 address in debug info to the correct code section,
623 it relies on adding SECT_OFF_TEXT to things which might be
624 code. If we clear all the section offsets, and set the
625 section VMAs instead, then symfile_relocate_debug_section
626 will return meaningful debug information pointing at the
629 GDB has too many different data structures for section
630 addresses - a bfd, objfile, and so_list all have section
631 tables, as does exec_ops. Some of these could probably
634 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
635 cur_sec
= cur_sec
->next
)
637 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
640 bfd_set_section_vma (abfd
, cur_sec
, offsets
[cur_sec
->index
]);
641 exec_set_section_address (bfd_get_filename (abfd
), cur_sec
->index
,
642 offsets
[cur_sec
->index
]);
643 offsets
[cur_sec
->index
] = 0;
648 /* Remember the bfd indexes for the .text, .data, .bss and
650 init_objfile_sect_indices (objfile
);
654 /* Divide the file into segments, which are individual relocatable units.
655 This is the default version of the sym_fns.sym_segments function for
656 symbol readers that do not have an explicit representation of segments.
657 It assumes that object files do not have segments, and fully linked
658 files have a single segment. */
660 struct symfile_segment_data
*
661 default_symfile_segments (bfd
*abfd
)
665 struct symfile_segment_data
*data
;
668 /* Relocatable files contain enough information to position each
669 loadable section independently; they should not be relocated
671 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
674 /* Make sure there is at least one loadable section in the file. */
675 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
677 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
685 low
= bfd_get_section_vma (abfd
, sect
);
686 high
= low
+ bfd_get_section_size (sect
);
688 data
= XZALLOC (struct symfile_segment_data
);
689 data
->num_segments
= 1;
690 data
->segment_bases
= XCALLOC (1, CORE_ADDR
);
691 data
->segment_sizes
= XCALLOC (1, CORE_ADDR
);
693 num_sections
= bfd_count_sections (abfd
);
694 data
->segment_info
= XCALLOC (num_sections
, int);
696 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
700 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
703 vma
= bfd_get_section_vma (abfd
, sect
);
706 if (vma
+ bfd_get_section_size (sect
) > high
)
707 high
= vma
+ bfd_get_section_size (sect
);
709 data
->segment_info
[i
] = 1;
712 data
->segment_bases
[0] = low
;
713 data
->segment_sizes
[0] = high
- low
;
718 /* Process a symbol file, as either the main file or as a dynamically
721 OBJFILE is where the symbols are to be read from.
723 ADDRS is the list of section load addresses. If the user has given
724 an 'add-symbol-file' command, then this is the list of offsets and
725 addresses he or she provided as arguments to the command; or, if
726 we're handling a shared library, these are the actual addresses the
727 sections are loaded at, according to the inferior's dynamic linker
728 (as gleaned by GDB's shared library code). We convert each address
729 into an offset from the section VMA's as it appears in the object
730 file, and then call the file's sym_offsets function to convert this
731 into a format-specific offset table --- a `struct section_offsets'.
732 If ADDRS is non-zero, OFFSETS must be zero.
734 OFFSETS is a table of section offsets already in the right
735 format-specific representation. NUM_OFFSETS is the number of
736 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
737 assume this is the proper table the call to sym_offsets described
738 above would produce. Instead of calling sym_offsets, we just dump
739 it right into objfile->section_offsets. (When we're re-reading
740 symbols from an objfile, we don't have the original load address
741 list any more; all we have is the section offset table.) If
742 OFFSETS is non-zero, ADDRS must be zero.
744 MAINLINE is nonzero if this is the main symbol file, or zero if
745 it's an extra symbol file such as dynamically loaded code.
747 VERBO is nonzero if the caller has printed a verbose message about
748 the symbol reading (and complaints can be more terse about it). */
751 syms_from_objfile (struct objfile
*objfile
,
752 struct section_addr_info
*addrs
,
753 struct section_offsets
*offsets
,
758 struct section_addr_info
*local_addr
= NULL
;
759 struct cleanup
*old_chain
;
761 gdb_assert (! (addrs
&& offsets
));
763 init_entry_point_info (objfile
);
764 objfile
->sf
= find_sym_fns (objfile
->obfd
);
766 if (objfile
->sf
== NULL
)
767 return; /* No symbols. */
769 /* Make sure that partially constructed symbol tables will be cleaned up
770 if an error occurs during symbol reading. */
771 old_chain
= make_cleanup_free_objfile (objfile
);
773 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
774 list. We now establish the convention that an addr of zero means
775 no load address was specified. */
776 if (! addrs
&& ! offsets
)
779 = alloc_section_addr_info (bfd_count_sections (objfile
->obfd
));
780 make_cleanup (xfree
, local_addr
);
784 /* Now either addrs or offsets is non-zero. */
788 /* We will modify the main symbol table, make sure that all its users
789 will be cleaned up if an error occurs during symbol reading. */
790 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
792 /* Since no error yet, throw away the old symbol table. */
794 if (symfile_objfile
!= NULL
)
796 free_objfile (symfile_objfile
);
797 symfile_objfile
= NULL
;
800 /* Currently we keep symbols from the add-symbol-file command.
801 If the user wants to get rid of them, they should do "symbol-file"
802 without arguments first. Not sure this is the best behavior
805 (*objfile
->sf
->sym_new_init
) (objfile
);
808 /* Convert addr into an offset rather than an absolute address.
809 We find the lowest address of a loaded segment in the objfile,
810 and assume that <addr> is where that got loaded.
812 We no longer warn if the lowest section is not a text segment (as
813 happens for the PA64 port. */
814 if (!mainline
&& addrs
&& addrs
->other
[0].name
)
816 asection
*lower_sect
;
818 CORE_ADDR lower_offset
;
821 /* Find lowest loadable section to be used as starting point for
822 continguous sections. FIXME!! won't work without call to find
823 .text first, but this assumes text is lowest section. */
824 lower_sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
825 if (lower_sect
== NULL
)
826 bfd_map_over_sections (objfile
->obfd
, find_lowest_section
,
828 if (lower_sect
== NULL
)
830 warning (_("no loadable sections found in added symbol-file %s"),
835 lower_offset
= bfd_section_vma (objfile
->obfd
, lower_sect
);
837 /* Calculate offsets for the loadable sections.
838 FIXME! Sections must be in order of increasing loadable section
839 so that contiguous sections can use the lower-offset!!!
841 Adjust offsets if the segments are not contiguous.
842 If the section is contiguous, its offset should be set to
843 the offset of the highest loadable section lower than it
844 (the loadable section directly below it in memory).
845 this_offset = lower_offset = lower_addr - lower_orig_addr */
847 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
849 if (addrs
->other
[i
].addr
!= 0)
851 sect
= bfd_get_section_by_name (objfile
->obfd
,
852 addrs
->other
[i
].name
);
856 -= bfd_section_vma (objfile
->obfd
, sect
);
857 lower_offset
= addrs
->other
[i
].addr
;
858 /* This is the index used by BFD. */
859 addrs
->other
[i
].sectindex
= sect
->index
;
863 warning (_("section %s not found in %s"),
864 addrs
->other
[i
].name
,
866 addrs
->other
[i
].addr
= 0;
870 addrs
->other
[i
].addr
= lower_offset
;
874 /* Initialize symbol reading routines for this objfile, allow complaints to
875 appear for this new file, and record how verbose to be, then do the
876 initial symbol reading for this file. */
878 (*objfile
->sf
->sym_init
) (objfile
);
879 clear_complaints (&symfile_complaints
, 1, verbo
);
882 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
885 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_offsets
);
887 /* Just copy in the offset table directly as given to us. */
888 objfile
->num_sections
= num_offsets
;
889 objfile
->section_offsets
890 = ((struct section_offsets
*)
891 obstack_alloc (&objfile
->objfile_obstack
, size
));
892 memcpy (objfile
->section_offsets
, offsets
, size
);
894 init_objfile_sect_indices (objfile
);
897 (*objfile
->sf
->sym_read
) (objfile
, mainline
);
899 /* Don't allow char * to have a typename (else would get caddr_t).
900 Ditto void *. FIXME: Check whether this is now done by all the
901 symbol readers themselves (many of them now do), and if so remove
904 TYPE_NAME (lookup_pointer_type (builtin_type_char
)) = 0;
905 TYPE_NAME (lookup_pointer_type (builtin_type_void
)) = 0;
907 /* Mark the objfile has having had initial symbol read attempted. Note
908 that this does not mean we found any symbols... */
910 objfile
->flags
|= OBJF_SYMS
;
912 /* Discard cleanups as symbol reading was successful. */
914 discard_cleanups (old_chain
);
917 /* Perform required actions after either reading in the initial
918 symbols for a new objfile, or mapping in the symbols from a reusable
922 new_symfile_objfile (struct objfile
*objfile
, int mainline
, int verbo
)
925 /* If this is the main symbol file we have to clean up all users of the
926 old main symbol file. Otherwise it is sufficient to fixup all the
927 breakpoints that may have been redefined by this symbol file. */
930 /* OK, make it the "real" symbol file. */
931 symfile_objfile
= objfile
;
933 clear_symtab_users ();
937 breakpoint_re_set ();
940 /* We're done reading the symbol file; finish off complaints. */
941 clear_complaints (&symfile_complaints
, 0, verbo
);
944 /* Process a symbol file, as either the main file or as a dynamically
947 ABFD is a BFD already open on the file, as from symfile_bfd_open.
948 This BFD will be closed on error, and is always consumed by this function.
950 FROM_TTY says how verbose to be.
952 MAINLINE specifies whether this is the main symbol file, or whether
953 it's an extra symbol file such as dynamically loaded code.
955 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
956 syms_from_objfile, above. ADDRS is ignored when MAINLINE is
959 Upon success, returns a pointer to the objfile that was added.
960 Upon failure, jumps back to command level (never returns). */
961 static struct objfile
*
962 symbol_file_add_with_addrs_or_offsets (bfd
*abfd
, int from_tty
,
963 struct section_addr_info
*addrs
,
964 struct section_offsets
*offsets
,
966 int mainline
, int flags
)
968 struct objfile
*objfile
;
969 struct partial_symtab
*psymtab
;
970 char *debugfile
= NULL
;
971 struct section_addr_info
*orig_addrs
= NULL
;
972 struct cleanup
*my_cleanups
;
973 const char *name
= bfd_get_filename (abfd
);
975 my_cleanups
= make_cleanup_bfd_close (abfd
);
977 /* Give user a chance to burp if we'd be
978 interactively wiping out any existing symbols. */
980 if ((have_full_symbols () || have_partial_symbols ())
983 && !query ("Load new symbol table from \"%s\"? ", name
))
984 error (_("Not confirmed."));
986 objfile
= allocate_objfile (abfd
, flags
);
987 discard_cleanups (my_cleanups
);
991 orig_addrs
= copy_section_addr_info (addrs
);
992 make_cleanup_free_section_addr_info (orig_addrs
);
995 /* We either created a new mapped symbol table, mapped an existing
996 symbol table file which has not had initial symbol reading
997 performed, or need to read an unmapped symbol table. */
998 if (from_tty
|| info_verbose
)
1000 if (deprecated_pre_add_symbol_hook
)
1001 deprecated_pre_add_symbol_hook (name
);
1004 if (print_symbol_loading
)
1006 printf_unfiltered (_("Reading symbols from %s..."), name
);
1008 gdb_flush (gdb_stdout
);
1012 syms_from_objfile (objfile
, addrs
, offsets
, num_offsets
,
1013 mainline
, from_tty
);
1015 /* We now have at least a partial symbol table. Check to see if the
1016 user requested that all symbols be read on initial access via either
1017 the gdb startup command line or on a per symbol file basis. Expand
1018 all partial symbol tables for this objfile if so. */
1020 if ((flags
& OBJF_READNOW
) || readnow_symbol_files
)
1022 if ((from_tty
|| info_verbose
) && print_symbol_loading
)
1024 printf_unfiltered (_("expanding to full symbols..."));
1026 gdb_flush (gdb_stdout
);
1029 for (psymtab
= objfile
->psymtabs
;
1031 psymtab
= psymtab
->next
)
1033 psymtab_to_symtab (psymtab
);
1037 /* If the file has its own symbol tables it has no separate debug info.
1038 `.dynsym'/`.symtab' go to MSYMBOLS, `.debug_info' goes to SYMTABS/PSYMTABS.
1039 `.gnu_debuglink' may no longer be present with `.note.gnu.build-id'. */
1040 if (objfile
->psymtabs
== NULL
)
1041 debugfile
= find_separate_debug_file (objfile
);
1046 objfile
->separate_debug_objfile
1047 = symbol_file_add (debugfile
, from_tty
, orig_addrs
, 0, flags
);
1051 objfile
->separate_debug_objfile
1052 = symbol_file_add (debugfile
, from_tty
, NULL
, 0, flags
);
1054 objfile
->separate_debug_objfile
->separate_debug_objfile_backlink
1057 /* Put the separate debug object before the normal one, this is so that
1058 usage of the ALL_OBJFILES_SAFE macro will stay safe. */
1059 put_objfile_before (objfile
->separate_debug_objfile
, objfile
);
1064 if (!have_partial_symbols () && !have_full_symbols ()
1065 && print_symbol_loading
)
1068 printf_filtered (_("(no debugging symbols found)"));
1069 if (from_tty
|| info_verbose
)
1070 printf_filtered ("...");
1072 printf_filtered ("\n");
1076 if (from_tty
|| info_verbose
)
1078 if (deprecated_post_add_symbol_hook
)
1079 deprecated_post_add_symbol_hook ();
1082 if (print_symbol_loading
)
1083 printf_unfiltered (_("done.\n"));
1087 /* We print some messages regardless of whether 'from_tty ||
1088 info_verbose' is true, so make sure they go out at the right
1090 gdb_flush (gdb_stdout
);
1092 do_cleanups (my_cleanups
);
1094 if (objfile
->sf
== NULL
)
1095 return objfile
; /* No symbols. */
1097 new_symfile_objfile (objfile
, mainline
, from_tty
);
1099 observer_notify_new_objfile (objfile
);
1101 bfd_cache_close_all ();
1106 /* Process the symbol file ABFD, as either the main file or as a
1107 dynamically loaded file.
1109 See symbol_file_add_with_addrs_or_offsets's comments for
1112 symbol_file_add_from_bfd (bfd
*abfd
, int from_tty
,
1113 struct section_addr_info
*addrs
,
1114 int mainline
, int flags
)
1116 return symbol_file_add_with_addrs_or_offsets (abfd
,
1117 from_tty
, addrs
, 0, 0,
1122 /* Process a symbol file, as either the main file or as a dynamically
1123 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
1126 symbol_file_add (char *name
, int from_tty
, struct section_addr_info
*addrs
,
1127 int mainline
, int flags
)
1129 return symbol_file_add_from_bfd (symfile_bfd_open (name
), from_tty
,
1130 addrs
, mainline
, flags
);
1134 /* Call symbol_file_add() with default values and update whatever is
1135 affected by the loading of a new main().
1136 Used when the file is supplied in the gdb command line
1137 and by some targets with special loading requirements.
1138 The auxiliary function, symbol_file_add_main_1(), has the flags
1139 argument for the switches that can only be specified in the symbol_file
1143 symbol_file_add_main (char *args
, int from_tty
)
1145 symbol_file_add_main_1 (args
, from_tty
, 0);
1149 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
1151 symbol_file_add (args
, from_tty
, NULL
, 1, flags
);
1153 /* Getting new symbols may change our opinion about
1154 what is frameless. */
1155 reinit_frame_cache ();
1157 set_initial_language ();
1161 symbol_file_clear (int from_tty
)
1163 if ((have_full_symbols () || have_partial_symbols ())
1166 ? !query (_("Discard symbol table from `%s'? "),
1167 symfile_objfile
->name
)
1168 : !query (_("Discard symbol table? "))))
1169 error (_("Not confirmed."));
1170 free_all_objfiles ();
1172 /* solib descriptors may have handles to objfiles. Since their
1173 storage has just been released, we'd better wipe the solib
1174 descriptors as well.
1176 no_shared_libraries (NULL
, from_tty
);
1178 symfile_objfile
= NULL
;
1180 printf_unfiltered (_("No symbol file now.\n"));
1189 /* Locate NT_GNU_BUILD_ID from ABFD and return its content. */
1191 static struct build_id
*
1192 build_id_bfd_get (bfd
*abfd
)
1194 struct build_id
*retval
;
1196 if (!bfd_check_format (abfd
, bfd_object
)
1197 || bfd_get_flavour (abfd
) != bfd_target_elf_flavour
1198 || elf_tdata (abfd
)->build_id
== NULL
)
1201 retval
= xmalloc (sizeof *retval
- 1 + elf_tdata (abfd
)->build_id_size
);
1202 retval
->size
= elf_tdata (abfd
)->build_id_size
;
1203 memcpy (retval
->data
, elf_tdata (abfd
)->build_id
, retval
->size
);
1208 /* Return if FILENAME has NT_GNU_BUILD_ID matching the CHECK value. */
1211 build_id_verify (const char *filename
, struct build_id
*check
)
1214 struct build_id
*found
= NULL
;
1217 /* We expect to be silent on the non-existing files. */
1218 if (remote_filename_p (filename
))
1219 abfd
= remote_bfd_open (filename
, gnutarget
);
1221 abfd
= bfd_openr (filename
, gnutarget
);
1225 found
= build_id_bfd_get (abfd
);
1228 warning (_("File \"%s\" has no build-id, file skipped"), filename
);
1229 else if (found
->size
!= check
->size
1230 || memcmp (found
->data
, check
->data
, found
->size
) != 0)
1231 warning (_("File \"%s\" has a different build-id, file skipped"), filename
);
1235 if (!bfd_close (abfd
))
1236 warning (_("cannot close \"%s\": %s"), filename
,
1237 bfd_errmsg (bfd_get_error ()));
1242 build_id_to_debug_filename (struct build_id
*build_id
)
1244 char *link
, *s
, *retval
= NULL
;
1245 gdb_byte
*data
= build_id
->data
;
1246 size_t size
= build_id
->size
;
1248 /* DEBUG_FILE_DIRECTORY/.build-id/ab/cdef */
1249 link
= xmalloc (strlen (debug_file_directory
) + (sizeof "/.build-id/" - 1) + 1
1250 + 2 * size
+ (sizeof ".debug" - 1) + 1);
1251 s
= link
+ sprintf (link
, "%s/.build-id/", debug_file_directory
);
1255 s
+= sprintf (s
, "%02x", (unsigned) *data
++);
1260 s
+= sprintf (s
, "%02x", (unsigned) *data
++);
1261 strcpy (s
, ".debug");
1263 /* lrealpath() is expensive even for the usually non-existent files. */
1264 if (access (link
, F_OK
) == 0)
1265 retval
= lrealpath (link
);
1268 if (retval
!= NULL
&& !build_id_verify (retval
, build_id
))
1278 get_debug_link_info (struct objfile
*objfile
, unsigned long *crc32_out
)
1281 bfd_size_type debuglink_size
;
1282 unsigned long crc32
;
1287 sect
= bfd_get_section_by_name (objfile
->obfd
, ".gnu_debuglink");
1292 debuglink_size
= bfd_section_size (objfile
->obfd
, sect
);
1294 contents
= xmalloc (debuglink_size
);
1295 bfd_get_section_contents (objfile
->obfd
, sect
, contents
,
1296 (file_ptr
)0, (bfd_size_type
)debuglink_size
);
1298 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1299 crc_offset
= strlen (contents
) + 1;
1300 crc_offset
= (crc_offset
+ 3) & ~3;
1302 crc32
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) (contents
+ crc_offset
));
1309 separate_debug_file_exists (const char *name
, unsigned long crc
)
1311 unsigned long file_crc
= 0;
1313 gdb_byte buffer
[8*1024];
1316 if (remote_filename_p (name
))
1317 abfd
= remote_bfd_open (name
, gnutarget
);
1319 abfd
= bfd_openr (name
, gnutarget
);
1324 while ((count
= bfd_bread (buffer
, sizeof (buffer
), abfd
)) > 0)
1325 file_crc
= gnu_debuglink_crc32 (file_crc
, buffer
, count
);
1329 return crc
== file_crc
;
1332 char *debug_file_directory
= NULL
;
1334 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1335 struct cmd_list_element
*c
, const char *value
)
1337 fprintf_filtered (file
, _("\
1338 The directory where separate debug symbols are searched for is \"%s\".\n"),
1342 #if ! defined (DEBUG_SUBDIRECTORY)
1343 #define DEBUG_SUBDIRECTORY ".debug"
1347 find_separate_debug_file (struct objfile
*objfile
)
1355 bfd_size_type debuglink_size
;
1356 unsigned long crc32
;
1358 struct build_id
*build_id
;
1360 build_id
= build_id_bfd_get (objfile
->obfd
);
1361 if (build_id
!= NULL
)
1363 char *build_id_name
;
1365 build_id_name
= build_id_to_debug_filename (build_id
);
1367 /* Prevent looping on a stripped .debug file. */
1368 if (build_id_name
!= NULL
&& strcmp (build_id_name
, objfile
->name
) == 0)
1370 warning (_("\"%s\": separate debug info file has no debug info"),
1372 xfree (build_id_name
);
1374 else if (build_id_name
!= NULL
)
1375 return build_id_name
;
1378 basename
= get_debug_link_info (objfile
, &crc32
);
1380 if (basename
== NULL
)
1383 dir
= xstrdup (objfile
->name
);
1385 /* Strip off the final filename part, leaving the directory name,
1386 followed by a slash. Objfile names should always be absolute and
1387 tilde-expanded, so there should always be a slash in there
1389 for (i
= strlen(dir
) - 1; i
>= 0; i
--)
1391 if (IS_DIR_SEPARATOR (dir
[i
]))
1394 gdb_assert (i
>= 0 && IS_DIR_SEPARATOR (dir
[i
]));
1397 debugfile
= alloca (strlen (debug_file_directory
) + 1
1399 + strlen (DEBUG_SUBDIRECTORY
)
1404 /* First try in the same directory as the original file. */
1405 strcpy (debugfile
, dir
);
1406 strcat (debugfile
, basename
);
1408 if (separate_debug_file_exists (debugfile
, crc32
))
1412 return xstrdup (debugfile
);
1415 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1416 strcpy (debugfile
, dir
);
1417 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1418 strcat (debugfile
, "/");
1419 strcat (debugfile
, basename
);
1421 if (separate_debug_file_exists (debugfile
, crc32
))
1425 return xstrdup (debugfile
);
1428 /* Then try in the global debugfile directory. */
1429 strcpy (debugfile
, debug_file_directory
);
1430 strcat (debugfile
, "/");
1431 strcat (debugfile
, dir
);
1432 strcat (debugfile
, basename
);
1434 if (separate_debug_file_exists (debugfile
, crc32
))
1438 return xstrdup (debugfile
);
1441 /* If the file is in the sysroot, try using its base path in the
1442 global debugfile directory. */
1443 canon_name
= lrealpath (dir
);
1445 && strncmp (canon_name
, gdb_sysroot
, strlen (gdb_sysroot
)) == 0
1446 && IS_DIR_SEPARATOR (canon_name
[strlen (gdb_sysroot
)]))
1448 strcpy (debugfile
, debug_file_directory
);
1449 strcat (debugfile
, canon_name
+ strlen (gdb_sysroot
));
1450 strcat (debugfile
, "/");
1451 strcat (debugfile
, basename
);
1453 if (separate_debug_file_exists (debugfile
, crc32
))
1458 return xstrdup (debugfile
);
1471 /* This is the symbol-file command. Read the file, analyze its
1472 symbols, and add a struct symtab to a symtab list. The syntax of
1473 the command is rather bizarre:
1475 1. The function buildargv implements various quoting conventions
1476 which are undocumented and have little or nothing in common with
1477 the way things are quoted (or not quoted) elsewhere in GDB.
1479 2. Options are used, which are not generally used in GDB (perhaps
1480 "set mapped on", "set readnow on" would be better)
1482 3. The order of options matters, which is contrary to GNU
1483 conventions (because it is confusing and inconvenient). */
1486 symbol_file_command (char *args
, int from_tty
)
1492 symbol_file_clear (from_tty
);
1496 char **argv
= buildargv (args
);
1497 int flags
= OBJF_USERLOADED
;
1498 struct cleanup
*cleanups
;
1504 cleanups
= make_cleanup_freeargv (argv
);
1505 while (*argv
!= NULL
)
1507 if (strcmp (*argv
, "-readnow") == 0)
1508 flags
|= OBJF_READNOW
;
1509 else if (**argv
== '-')
1510 error (_("unknown option `%s'"), *argv
);
1513 symbol_file_add_main_1 (*argv
, from_tty
, flags
);
1521 error (_("no symbol file name was specified"));
1523 do_cleanups (cleanups
);
1527 /* Set the initial language.
1529 FIXME: A better solution would be to record the language in the
1530 psymtab when reading partial symbols, and then use it (if known) to
1531 set the language. This would be a win for formats that encode the
1532 language in an easily discoverable place, such as DWARF. For
1533 stabs, we can jump through hoops looking for specially named
1534 symbols or try to intuit the language from the specific type of
1535 stabs we find, but we can't do that until later when we read in
1539 set_initial_language (void)
1541 struct partial_symtab
*pst
;
1542 enum language lang
= language_unknown
;
1544 pst
= find_main_psymtab ();
1547 if (pst
->filename
!= NULL
)
1548 lang
= deduce_language_from_filename (pst
->filename
);
1550 if (lang
== language_unknown
)
1552 /* Make C the default language */
1556 set_language (lang
);
1557 expected_language
= current_language
; /* Don't warn the user. */
1561 /* Open the file specified by NAME and hand it off to BFD for
1562 preliminary analysis. Return a newly initialized bfd *, which
1563 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1564 absolute). In case of trouble, error() is called. */
1567 symfile_bfd_open (char *name
)
1571 char *absolute_name
;
1573 if (remote_filename_p (name
))
1575 name
= xstrdup (name
);
1576 sym_bfd
= remote_bfd_open (name
, gnutarget
);
1579 make_cleanup (xfree
, name
);
1580 error (_("`%s': can't open to read symbols: %s."), name
,
1581 bfd_errmsg (bfd_get_error ()));
1584 if (!bfd_check_format (sym_bfd
, bfd_object
))
1586 bfd_close (sym_bfd
);
1587 make_cleanup (xfree
, name
);
1588 error (_("`%s': can't read symbols: %s."), name
,
1589 bfd_errmsg (bfd_get_error ()));
1595 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy. */
1597 /* Look down path for it, allocate 2nd new malloc'd copy. */
1598 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, name
,
1599 O_RDONLY
| O_BINARY
, 0, &absolute_name
);
1600 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1603 char *exename
= alloca (strlen (name
) + 5);
1604 strcat (strcpy (exename
, name
), ".exe");
1605 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, exename
,
1606 O_RDONLY
| O_BINARY
, 0, &absolute_name
);
1611 make_cleanup (xfree
, name
);
1612 perror_with_name (name
);
1615 /* Free 1st new malloc'd copy, but keep the 2nd malloc'd copy in
1616 bfd. It'll be freed in free_objfile(). */
1618 name
= absolute_name
;
1620 sym_bfd
= bfd_fopen (name
, gnutarget
, FOPEN_RB
, desc
);
1624 make_cleanup (xfree
, name
);
1625 error (_("`%s': can't open to read symbols: %s."), name
,
1626 bfd_errmsg (bfd_get_error ()));
1628 bfd_set_cacheable (sym_bfd
, 1);
1630 if (!bfd_check_format (sym_bfd
, bfd_object
))
1632 /* FIXME: should be checking for errors from bfd_close (for one
1633 thing, on error it does not free all the storage associated
1635 bfd_close (sym_bfd
); /* This also closes desc. */
1636 make_cleanup (xfree
, name
);
1637 error (_("`%s': can't read symbols: %s."), name
,
1638 bfd_errmsg (bfd_get_error ()));
1644 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1645 the section was not found. */
1648 get_section_index (struct objfile
*objfile
, char *section_name
)
1650 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1658 /* Link SF into the global symtab_fns list. Called on startup by the
1659 _initialize routine in each object file format reader, to register
1660 information about each format the the reader is prepared to
1664 add_symtab_fns (struct sym_fns
*sf
)
1666 sf
->next
= symtab_fns
;
1670 /* Initialize OBJFILE to read symbols from its associated BFD. It
1671 either returns or calls error(). The result is an initialized
1672 struct sym_fns in the objfile structure, that contains cached
1673 information about the symbol file. */
1675 static struct sym_fns
*
1676 find_sym_fns (bfd
*abfd
)
1679 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1681 if (our_flavour
== bfd_target_srec_flavour
1682 || our_flavour
== bfd_target_ihex_flavour
1683 || our_flavour
== bfd_target_tekhex_flavour
)
1684 return NULL
; /* No symbols. */
1686 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
->next
)
1687 if (our_flavour
== sf
->sym_flavour
)
1690 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1691 bfd_get_target (abfd
));
1695 /* This function runs the load command of our current target. */
1698 load_command (char *arg
, int from_tty
)
1700 /* The user might be reloading because the binary has changed. Take
1701 this opportunity to check. */
1702 reopen_exec_file ();
1710 parg
= arg
= get_exec_file (1);
1712 /* Count how many \ " ' tab space there are in the name. */
1713 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1721 /* We need to quote this string so buildargv can pull it apart. */
1722 char *temp
= xmalloc (strlen (arg
) + count
+ 1 );
1726 make_cleanup (xfree
, temp
);
1729 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1731 strncpy (ptemp
, prev
, parg
- prev
);
1732 ptemp
+= parg
- prev
;
1736 strcpy (ptemp
, prev
);
1742 target_load (arg
, from_tty
);
1744 /* After re-loading the executable, we don't really know which
1745 overlays are mapped any more. */
1746 overlay_cache_invalid
= 1;
1749 /* This version of "load" should be usable for any target. Currently
1750 it is just used for remote targets, not inftarg.c or core files,
1751 on the theory that only in that case is it useful.
1753 Avoiding xmodem and the like seems like a win (a) because we don't have
1754 to worry about finding it, and (b) On VMS, fork() is very slow and so
1755 we don't want to run a subprocess. On the other hand, I'm not sure how
1756 performance compares. */
1758 static int validate_download
= 0;
1760 /* Callback service function for generic_load (bfd_map_over_sections). */
1763 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1765 bfd_size_type
*sum
= data
;
1767 *sum
+= bfd_get_section_size (asec
);
1770 /* Opaque data for load_section_callback. */
1771 struct load_section_data
{
1772 unsigned long load_offset
;
1773 struct load_progress_data
*progress_data
;
1774 VEC(memory_write_request_s
) *requests
;
1777 /* Opaque data for load_progress. */
1778 struct load_progress_data
{
1779 /* Cumulative data. */
1780 unsigned long write_count
;
1781 unsigned long data_count
;
1782 bfd_size_type total_size
;
1785 /* Opaque data for load_progress for a single section. */
1786 struct load_progress_section_data
{
1787 struct load_progress_data
*cumulative
;
1789 /* Per-section data. */
1790 const char *section_name
;
1791 ULONGEST section_sent
;
1792 ULONGEST section_size
;
1797 /* Target write callback routine for progress reporting. */
1800 load_progress (ULONGEST bytes
, void *untyped_arg
)
1802 struct load_progress_section_data
*args
= untyped_arg
;
1803 struct load_progress_data
*totals
;
1806 /* Writing padding data. No easy way to get at the cumulative
1807 stats, so just ignore this. */
1810 totals
= args
->cumulative
;
1812 if (bytes
== 0 && args
->section_sent
== 0)
1814 /* The write is just starting. Let the user know we've started
1816 ui_out_message (uiout
, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1817 args
->section_name
, paddr_nz (args
->section_size
),
1818 paddr_nz (args
->lma
));
1822 if (validate_download
)
1824 /* Broken memories and broken monitors manifest themselves here
1825 when bring new computers to life. This doubles already slow
1827 /* NOTE: cagney/1999-10-18: A more efficient implementation
1828 might add a verify_memory() method to the target vector and
1829 then use that. remote.c could implement that method using
1830 the ``qCRC'' packet. */
1831 gdb_byte
*check
= xmalloc (bytes
);
1832 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
1834 if (target_read_memory (args
->lma
, check
, bytes
) != 0)
1835 error (_("Download verify read failed at 0x%s"),
1837 if (memcmp (args
->buffer
, check
, bytes
) != 0)
1838 error (_("Download verify compare failed at 0x%s"),
1840 do_cleanups (verify_cleanups
);
1842 totals
->data_count
+= bytes
;
1844 args
->buffer
+= bytes
;
1845 totals
->write_count
+= 1;
1846 args
->section_sent
+= bytes
;
1848 || (deprecated_ui_load_progress_hook
!= NULL
1849 && deprecated_ui_load_progress_hook (args
->section_name
,
1850 args
->section_sent
)))
1851 error (_("Canceled the download"));
1853 if (deprecated_show_load_progress
!= NULL
)
1854 deprecated_show_load_progress (args
->section_name
,
1858 totals
->total_size
);
1861 /* Callback service function for generic_load (bfd_map_over_sections). */
1864 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1866 struct memory_write_request
*new_request
;
1867 struct load_section_data
*args
= data
;
1868 struct load_progress_section_data
*section_data
;
1869 bfd_size_type size
= bfd_get_section_size (asec
);
1871 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1873 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
1879 new_request
= VEC_safe_push (memory_write_request_s
,
1880 args
->requests
, NULL
);
1881 memset (new_request
, 0, sizeof (struct memory_write_request
));
1882 section_data
= xcalloc (1, sizeof (struct load_progress_section_data
));
1883 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1884 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size be in instead? */
1885 new_request
->data
= xmalloc (size
);
1886 new_request
->baton
= section_data
;
1888 buffer
= new_request
->data
;
1890 section_data
->cumulative
= args
->progress_data
;
1891 section_data
->section_name
= sect_name
;
1892 section_data
->section_size
= size
;
1893 section_data
->lma
= new_request
->begin
;
1894 section_data
->buffer
= buffer
;
1896 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1899 /* Clean up an entire memory request vector, including load
1900 data and progress records. */
1903 clear_memory_write_data (void *arg
)
1905 VEC(memory_write_request_s
) **vec_p
= arg
;
1906 VEC(memory_write_request_s
) *vec
= *vec_p
;
1908 struct memory_write_request
*mr
;
1910 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
1915 VEC_free (memory_write_request_s
, vec
);
1919 generic_load (char *args
, int from_tty
)
1922 struct timeval start_time
, end_time
;
1924 struct cleanup
*old_cleanups
= make_cleanup (null_cleanup
, 0);
1925 struct load_section_data cbdata
;
1926 struct load_progress_data total_progress
;
1931 memset (&cbdata
, 0, sizeof (cbdata
));
1932 memset (&total_progress
, 0, sizeof (total_progress
));
1933 cbdata
.progress_data
= &total_progress
;
1935 make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
1937 argv
= buildargv (args
);
1942 make_cleanup_freeargv (argv
);
1944 filename
= tilde_expand (argv
[0]);
1945 make_cleanup (xfree
, filename
);
1947 if (argv
[1] != NULL
)
1951 cbdata
.load_offset
= strtoul (argv
[1], &endptr
, 0);
1953 /* If the last word was not a valid number then
1954 treat it as a file name with spaces in. */
1955 if (argv
[1] == endptr
)
1956 error (_("Invalid download offset:%s."), argv
[1]);
1958 if (argv
[2] != NULL
)
1959 error (_("Too many parameters."));
1962 /* Open the file for loading. */
1963 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
1964 if (loadfile_bfd
== NULL
)
1966 perror_with_name (filename
);
1970 /* FIXME: should be checking for errors from bfd_close (for one thing,
1971 on error it does not free all the storage associated with the
1973 make_cleanup_bfd_close (loadfile_bfd
);
1975 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
1977 error (_("\"%s\" is not an object file: %s"), filename
,
1978 bfd_errmsg (bfd_get_error ()));
1981 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
1982 (void *) &total_progress
.total_size
);
1984 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
1986 gettimeofday (&start_time
, NULL
);
1988 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
1989 load_progress
) != 0)
1990 error (_("Load failed"));
1992 gettimeofday (&end_time
, NULL
);
1994 entry
= bfd_get_start_address (loadfile_bfd
);
1995 ui_out_text (uiout
, "Start address ");
1996 ui_out_field_fmt (uiout
, "address", "0x%s", paddr_nz (entry
));
1997 ui_out_text (uiout
, ", load size ");
1998 ui_out_field_fmt (uiout
, "load-size", "%lu", total_progress
.data_count
);
1999 ui_out_text (uiout
, "\n");
2000 /* We were doing this in remote-mips.c, I suspect it is right
2001 for other targets too. */
2004 /* FIXME: are we supposed to call symbol_file_add or not? According
2005 to a comment from remote-mips.c (where a call to symbol_file_add
2006 was commented out), making the call confuses GDB if more than one
2007 file is loaded in. Some targets do (e.g., remote-vx.c) but
2008 others don't (or didn't - perhaps they have all been deleted). */
2010 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2011 total_progress
.write_count
,
2012 &start_time
, &end_time
);
2014 do_cleanups (old_cleanups
);
2017 /* Report how fast the transfer went. */
2019 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
2020 replaced by print_transfer_performance (with a very different
2021 function signature). */
2024 report_transfer_performance (unsigned long data_count
, time_t start_time
,
2027 struct timeval start
, end
;
2029 start
.tv_sec
= start_time
;
2031 end
.tv_sec
= end_time
;
2034 print_transfer_performance (gdb_stdout
, data_count
, 0, &start
, &end
);
2038 print_transfer_performance (struct ui_file
*stream
,
2039 unsigned long data_count
,
2040 unsigned long write_count
,
2041 const struct timeval
*start_time
,
2042 const struct timeval
*end_time
)
2044 ULONGEST time_count
;
2046 /* Compute the elapsed time in milliseconds, as a tradeoff between
2047 accuracy and overflow. */
2048 time_count
= (end_time
->tv_sec
- start_time
->tv_sec
) * 1000;
2049 time_count
+= (end_time
->tv_usec
- start_time
->tv_usec
) / 1000;
2051 ui_out_text (uiout
, "Transfer rate: ");
2054 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / time_count
;
2056 if (ui_out_is_mi_like_p (uiout
))
2058 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
* 8);
2059 ui_out_text (uiout
, " bits/sec");
2061 else if (rate
< 1024)
2063 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
);
2064 ui_out_text (uiout
, " bytes/sec");
2068 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
/ 1024);
2069 ui_out_text (uiout
, " KB/sec");
2074 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
2075 ui_out_text (uiout
, " bits in <1 sec");
2077 if (write_count
> 0)
2079 ui_out_text (uiout
, ", ");
2080 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
2081 ui_out_text (uiout
, " bytes/write");
2083 ui_out_text (uiout
, ".\n");
2086 /* This function allows the addition of incrementally linked object files.
2087 It does not modify any state in the target, only in the debugger. */
2088 /* Note: ezannoni 2000-04-13 This function/command used to have a
2089 special case syntax for the rombug target (Rombug is the boot
2090 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2091 rombug case, the user doesn't need to supply a text address,
2092 instead a call to target_link() (in target.c) would supply the
2093 value to use. We are now discontinuing this type of ad hoc syntax. */
2096 add_symbol_file_command (char *args
, int from_tty
)
2098 char *filename
= NULL
;
2099 int flags
= OBJF_USERLOADED
;
2101 int expecting_option
= 0;
2102 int section_index
= 0;
2106 int expecting_sec_name
= 0;
2107 int expecting_sec_addr
= 0;
2116 struct section_addr_info
*section_addrs
;
2117 struct sect_opt
*sect_opts
= NULL
;
2118 size_t num_sect_opts
= 0;
2119 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2122 sect_opts
= (struct sect_opt
*) xmalloc (num_sect_opts
2123 * sizeof (struct sect_opt
));
2128 error (_("add-symbol-file takes a file name and an address"));
2130 argv
= buildargv (args
);
2131 make_cleanup_freeargv (argv
);
2136 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2138 /* Process the argument. */
2141 /* The first argument is the file name. */
2142 filename
= tilde_expand (arg
);
2143 make_cleanup (xfree
, filename
);
2148 /* The second argument is always the text address at which
2149 to load the program. */
2150 sect_opts
[section_index
].name
= ".text";
2151 sect_opts
[section_index
].value
= arg
;
2152 if (++section_index
>= num_sect_opts
)
2155 sect_opts
= ((struct sect_opt
*)
2156 xrealloc (sect_opts
,
2158 * sizeof (struct sect_opt
)));
2163 /* It's an option (starting with '-') or it's an argument
2168 if (strcmp (arg
, "-readnow") == 0)
2169 flags
|= OBJF_READNOW
;
2170 else if (strcmp (arg
, "-s") == 0)
2172 expecting_sec_name
= 1;
2173 expecting_sec_addr
= 1;
2178 if (expecting_sec_name
)
2180 sect_opts
[section_index
].name
= arg
;
2181 expecting_sec_name
= 0;
2184 if (expecting_sec_addr
)
2186 sect_opts
[section_index
].value
= arg
;
2187 expecting_sec_addr
= 0;
2188 if (++section_index
>= num_sect_opts
)
2191 sect_opts
= ((struct sect_opt
*)
2192 xrealloc (sect_opts
,
2194 * sizeof (struct sect_opt
)));
2198 error (_("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*"));
2203 /* This command takes at least two arguments. The first one is a
2204 filename, and the second is the address where this file has been
2205 loaded. Abort now if this address hasn't been provided by the
2207 if (section_index
< 1)
2208 error (_("The address where %s has been loaded is missing"), filename
);
2210 /* Print the prompt for the query below. And save the arguments into
2211 a sect_addr_info structure to be passed around to other
2212 functions. We have to split this up into separate print
2213 statements because hex_string returns a local static
2216 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename
);
2217 section_addrs
= alloc_section_addr_info (section_index
);
2218 make_cleanup (xfree
, section_addrs
);
2219 for (i
= 0; i
< section_index
; i
++)
2222 char *val
= sect_opts
[i
].value
;
2223 char *sec
= sect_opts
[i
].name
;
2225 addr
= parse_and_eval_address (val
);
2227 /* Here we store the section offsets in the order they were
2228 entered on the command line. */
2229 section_addrs
->other
[sec_num
].name
= sec
;
2230 section_addrs
->other
[sec_num
].addr
= addr
;
2231 printf_unfiltered ("\t%s_addr = %s\n", sec
, paddress (addr
));
2234 /* The object's sections are initialized when a
2235 call is made to build_objfile_section_table (objfile).
2236 This happens in reread_symbols.
2237 At this point, we don't know what file type this is,
2238 so we can't determine what section names are valid. */
2241 if (from_tty
&& (!query ("%s", "")))
2242 error (_("Not confirmed."));
2244 symbol_file_add (filename
, from_tty
, section_addrs
, 0, flags
);
2246 /* Getting new symbols may change our opinion about what is
2248 reinit_frame_cache ();
2249 do_cleanups (my_cleanups
);
2253 add_shared_symbol_files_command (char *args
, int from_tty
)
2255 #ifdef ADD_SHARED_SYMBOL_FILES
2256 ADD_SHARED_SYMBOL_FILES (args
, from_tty
);
2258 error (_("This command is not available in this configuration of GDB."));
2262 /* Re-read symbols if a symbol-file has changed. */
2264 reread_symbols (void)
2266 struct objfile
*objfile
;
2269 struct stat new_statbuf
;
2272 /* With the addition of shared libraries, this should be modified,
2273 the load time should be saved in the partial symbol tables, since
2274 different tables may come from different source files. FIXME.
2275 This routine should then walk down each partial symbol table
2276 and see if the symbol table that it originates from has been changed */
2278 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2282 #ifdef DEPRECATED_IBM6000_TARGET
2283 /* If this object is from a shared library, then you should
2284 stat on the library name, not member name. */
2286 if (objfile
->obfd
->my_archive
)
2287 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2290 res
= stat (objfile
->name
, &new_statbuf
);
2293 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2294 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2298 new_modtime
= new_statbuf
.st_mtime
;
2299 if (new_modtime
!= objfile
->mtime
)
2301 struct cleanup
*old_cleanups
;
2302 struct section_offsets
*offsets
;
2304 char *obfd_filename
;
2306 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2309 /* There are various functions like symbol_file_add,
2310 symfile_bfd_open, syms_from_objfile, etc., which might
2311 appear to do what we want. But they have various other
2312 effects which we *don't* want. So we just do stuff
2313 ourselves. We don't worry about mapped files (for one thing,
2314 any mapped file will be out of date). */
2316 /* If we get an error, blow away this objfile (not sure if
2317 that is the correct response for things like shared
2319 old_cleanups
= make_cleanup_free_objfile (objfile
);
2320 /* We need to do this whenever any symbols go away. */
2321 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2323 if (exec_bfd
!= NULL
&& strcmp (bfd_get_filename (objfile
->obfd
),
2324 bfd_get_filename (exec_bfd
)) == 0)
2326 /* Reload EXEC_BFD without asking anything. */
2328 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2331 /* Clean up any state BFD has sitting around. We don't need
2332 to close the descriptor but BFD lacks a way of closing the
2333 BFD without closing the descriptor. */
2334 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2335 if (!bfd_close (objfile
->obfd
))
2336 error (_("Can't close BFD for %s: %s"), objfile
->name
,
2337 bfd_errmsg (bfd_get_error ()));
2338 if (remote_filename_p (obfd_filename
))
2339 objfile
->obfd
= remote_bfd_open (obfd_filename
, gnutarget
);
2341 objfile
->obfd
= bfd_openr (obfd_filename
, gnutarget
);
2342 if (objfile
->obfd
== NULL
)
2343 error (_("Can't open %s to read symbols."), objfile
->name
);
2344 /* bfd_openr sets cacheable to true, which is what we want. */
2345 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2346 error (_("Can't read symbols from %s: %s."), objfile
->name
,
2347 bfd_errmsg (bfd_get_error ()));
2349 /* Save the offsets, we will nuke them with the rest of the
2351 num_offsets
= objfile
->num_sections
;
2352 offsets
= ((struct section_offsets
*)
2353 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2354 memcpy (offsets
, objfile
->section_offsets
,
2355 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2357 /* Remove any references to this objfile in the global
2359 preserve_values (objfile
);
2361 /* Nuke all the state that we will re-read. Much of the following
2362 code which sets things to NULL really is necessary to tell
2363 other parts of GDB that there is nothing currently there. */
2365 /* FIXME: Do we have to free a whole linked list, or is this
2367 if (objfile
->global_psymbols
.list
)
2368 xfree (objfile
->global_psymbols
.list
);
2369 memset (&objfile
->global_psymbols
, 0,
2370 sizeof (objfile
->global_psymbols
));
2371 if (objfile
->static_psymbols
.list
)
2372 xfree (objfile
->static_psymbols
.list
);
2373 memset (&objfile
->static_psymbols
, 0,
2374 sizeof (objfile
->static_psymbols
));
2376 /* Free the obstacks for non-reusable objfiles */
2377 bcache_xfree (objfile
->psymbol_cache
);
2378 objfile
->psymbol_cache
= bcache_xmalloc ();
2379 bcache_xfree (objfile
->macro_cache
);
2380 objfile
->macro_cache
= bcache_xmalloc ();
2381 if (objfile
->demangled_names_hash
!= NULL
)
2383 htab_delete (objfile
->demangled_names_hash
);
2384 objfile
->demangled_names_hash
= NULL
;
2386 obstack_free (&objfile
->objfile_obstack
, 0);
2387 objfile
->sections
= NULL
;
2388 objfile
->symtabs
= NULL
;
2389 objfile
->psymtabs
= NULL
;
2390 objfile
->free_psymtabs
= NULL
;
2391 objfile
->cp_namespace_symtab
= NULL
;
2392 objfile
->msymbols
= NULL
;
2393 objfile
->deprecated_sym_private
= NULL
;
2394 objfile
->minimal_symbol_count
= 0;
2395 memset (&objfile
->msymbol_hash
, 0,
2396 sizeof (objfile
->msymbol_hash
));
2397 memset (&objfile
->msymbol_demangled_hash
, 0,
2398 sizeof (objfile
->msymbol_demangled_hash
));
2399 clear_objfile_data (objfile
);
2400 if (objfile
->sf
!= NULL
)
2402 (*objfile
->sf
->sym_finish
) (objfile
);
2405 objfile
->psymbol_cache
= bcache_xmalloc ();
2406 objfile
->macro_cache
= bcache_xmalloc ();
2407 /* obstack_init also initializes the obstack so it is
2408 empty. We could use obstack_specify_allocation but
2409 gdb_obstack.h specifies the alloc/dealloc
2411 obstack_init (&objfile
->objfile_obstack
);
2412 if (build_objfile_section_table (objfile
))
2414 error (_("Can't find the file sections in `%s': %s"),
2415 objfile
->name
, bfd_errmsg (bfd_get_error ()));
2417 terminate_minimal_symbol_table (objfile
);
2419 /* We use the same section offsets as from last time. I'm not
2420 sure whether that is always correct for shared libraries. */
2421 objfile
->section_offsets
= (struct section_offsets
*)
2422 obstack_alloc (&objfile
->objfile_obstack
,
2423 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2424 memcpy (objfile
->section_offsets
, offsets
,
2425 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2426 objfile
->num_sections
= num_offsets
;
2428 /* What the hell is sym_new_init for, anyway? The concept of
2429 distinguishing between the main file and additional files
2430 in this way seems rather dubious. */
2431 if (objfile
== symfile_objfile
)
2433 (*objfile
->sf
->sym_new_init
) (objfile
);
2436 (*objfile
->sf
->sym_init
) (objfile
);
2437 clear_complaints (&symfile_complaints
, 1, 1);
2438 /* The "mainline" parameter is a hideous hack; I think leaving it
2439 zero is OK since dbxread.c also does what it needs to do if
2440 objfile->global_psymbols.size is 0. */
2441 (*objfile
->sf
->sym_read
) (objfile
, 0);
2442 if (!have_partial_symbols () && !have_full_symbols ())
2445 printf_unfiltered (_("(no debugging symbols found)\n"));
2448 objfile
->flags
|= OBJF_SYMS
;
2450 /* We're done reading the symbol file; finish off complaints. */
2451 clear_complaints (&symfile_complaints
, 0, 1);
2453 /* Getting new symbols may change our opinion about what is
2456 reinit_frame_cache ();
2458 /* Discard cleanups as symbol reading was successful. */
2459 discard_cleanups (old_cleanups
);
2461 /* If the mtime has changed between the time we set new_modtime
2462 and now, we *want* this to be out of date, so don't call stat
2464 objfile
->mtime
= new_modtime
;
2466 reread_separate_symbols (objfile
);
2467 init_entry_point_info (objfile
);
2474 clear_symtab_users ();
2475 /* At least one objfile has changed, so we can consider that
2476 the executable we're debugging has changed too. */
2477 observer_notify_executable_changed ();
2483 /* Handle separate debug info for OBJFILE, which has just been
2485 - If we had separate debug info before, but now we don't, get rid
2486 of the separated objfile.
2487 - If we didn't have separated debug info before, but now we do,
2488 read in the new separated debug info file.
2489 - If the debug link points to a different file, toss the old one
2490 and read the new one.
2491 This function does *not* handle the case where objfile is still
2492 using the same separate debug info file, but that file's timestamp
2493 has changed. That case should be handled by the loop in
2494 reread_symbols already. */
2496 reread_separate_symbols (struct objfile
*objfile
)
2499 unsigned long crc32
;
2501 /* Does the updated objfile's debug info live in a
2503 debug_file
= find_separate_debug_file (objfile
);
2505 if (objfile
->separate_debug_objfile
)
2507 /* There are two cases where we need to get rid of
2508 the old separated debug info objfile:
2509 - if the new primary objfile doesn't have
2510 separated debug info, or
2511 - if the new primary objfile has separate debug
2512 info, but it's under a different filename.
2514 If the old and new objfiles both have separate
2515 debug info, under the same filename, then we're
2516 okay --- if the separated file's contents have
2517 changed, we will have caught that when we
2518 visited it in this function's outermost
2521 || strcmp (debug_file
, objfile
->separate_debug_objfile
->name
) != 0)
2522 free_objfile (objfile
->separate_debug_objfile
);
2525 /* If the new objfile has separate debug info, and we
2526 haven't loaded it already, do so now. */
2528 && ! objfile
->separate_debug_objfile
)
2530 /* Use the same section offset table as objfile itself.
2531 Preserve the flags from objfile that make sense. */
2532 objfile
->separate_debug_objfile
2533 = (symbol_file_add_with_addrs_or_offsets
2534 (symfile_bfd_open (debug_file
),
2535 info_verbose
, /* from_tty: Don't override the default. */
2536 0, /* No addr table. */
2537 objfile
->section_offsets
, objfile
->num_sections
,
2538 0, /* Not mainline. See comments about this above. */
2539 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
2540 | OBJF_USERLOADED
)));
2541 objfile
->separate_debug_objfile
->separate_debug_objfile_backlink
2559 static filename_language
*filename_language_table
;
2560 static int fl_table_size
, fl_table_next
;
2563 add_filename_language (char *ext
, enum language lang
)
2565 if (fl_table_next
>= fl_table_size
)
2567 fl_table_size
+= 10;
2568 filename_language_table
=
2569 xrealloc (filename_language_table
,
2570 fl_table_size
* sizeof (*filename_language_table
));
2573 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2574 filename_language_table
[fl_table_next
].lang
= lang
;
2578 static char *ext_args
;
2580 show_ext_args (struct ui_file
*file
, int from_tty
,
2581 struct cmd_list_element
*c
, const char *value
)
2583 fprintf_filtered (file
, _("\
2584 Mapping between filename extension and source language is \"%s\".\n"),
2589 set_ext_lang_command (char *args
, int from_tty
, struct cmd_list_element
*e
)
2592 char *cp
= ext_args
;
2595 /* First arg is filename extension, starting with '.' */
2597 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2599 /* Find end of first arg. */
2600 while (*cp
&& !isspace (*cp
))
2604 error (_("'%s': two arguments required -- filename extension and language"),
2607 /* Null-terminate first arg */
2610 /* Find beginning of second arg, which should be a source language. */
2611 while (*cp
&& isspace (*cp
))
2615 error (_("'%s': two arguments required -- filename extension and language"),
2618 /* Lookup the language from among those we know. */
2619 lang
= language_enum (cp
);
2621 /* Now lookup the filename extension: do we already know it? */
2622 for (i
= 0; i
< fl_table_next
; i
++)
2623 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2626 if (i
>= fl_table_next
)
2628 /* new file extension */
2629 add_filename_language (ext_args
, lang
);
2633 /* redefining a previously known filename extension */
2636 /* query ("Really make files of type %s '%s'?", */
2637 /* ext_args, language_str (lang)); */
2639 xfree (filename_language_table
[i
].ext
);
2640 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2641 filename_language_table
[i
].lang
= lang
;
2646 info_ext_lang_command (char *args
, int from_tty
)
2650 printf_filtered (_("Filename extensions and the languages they represent:"));
2651 printf_filtered ("\n\n");
2652 for (i
= 0; i
< fl_table_next
; i
++)
2653 printf_filtered ("\t%s\t- %s\n",
2654 filename_language_table
[i
].ext
,
2655 language_str (filename_language_table
[i
].lang
));
2659 init_filename_language_table (void)
2661 if (fl_table_size
== 0) /* protect against repetition */
2665 filename_language_table
=
2666 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
2667 add_filename_language (".c", language_c
);
2668 add_filename_language (".C", language_cplus
);
2669 add_filename_language (".cc", language_cplus
);
2670 add_filename_language (".cp", language_cplus
);
2671 add_filename_language (".cpp", language_cplus
);
2672 add_filename_language (".cxx", language_cplus
);
2673 add_filename_language (".c++", language_cplus
);
2674 add_filename_language (".java", language_java
);
2675 add_filename_language (".class", language_java
);
2676 add_filename_language (".m", language_objc
);
2677 add_filename_language (".f", language_fortran
);
2678 add_filename_language (".F", language_fortran
);
2679 add_filename_language (".s", language_asm
);
2680 add_filename_language (".sx", language_asm
);
2681 add_filename_language (".S", language_asm
);
2682 add_filename_language (".pas", language_pascal
);
2683 add_filename_language (".p", language_pascal
);
2684 add_filename_language (".pp", language_pascal
);
2685 add_filename_language (".adb", language_ada
);
2686 add_filename_language (".ads", language_ada
);
2687 add_filename_language (".a", language_ada
);
2688 add_filename_language (".ada", language_ada
);
2693 deduce_language_from_filename (char *filename
)
2698 if (filename
!= NULL
)
2699 if ((cp
= strrchr (filename
, '.')) != NULL
)
2700 for (i
= 0; i
< fl_table_next
; i
++)
2701 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2702 return filename_language_table
[i
].lang
;
2704 return language_unknown
;
2709 Allocate and partly initialize a new symbol table. Return a pointer
2710 to it. error() if no space.
2712 Caller must set these fields:
2718 possibly free_named_symtabs (symtab->filename);
2722 allocate_symtab (char *filename
, struct objfile
*objfile
)
2724 struct symtab
*symtab
;
2726 symtab
= (struct symtab
*)
2727 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symtab
));
2728 memset (symtab
, 0, sizeof (*symtab
));
2729 symtab
->filename
= obsavestring (filename
, strlen (filename
),
2730 &objfile
->objfile_obstack
);
2731 symtab
->fullname
= NULL
;
2732 symtab
->language
= deduce_language_from_filename (filename
);
2733 symtab
->debugformat
= obsavestring ("unknown", 7,
2734 &objfile
->objfile_obstack
);
2736 /* Hook it to the objfile it comes from */
2738 symtab
->objfile
= objfile
;
2739 symtab
->next
= objfile
->symtabs
;
2740 objfile
->symtabs
= symtab
;
2745 struct partial_symtab
*
2746 allocate_psymtab (char *filename
, struct objfile
*objfile
)
2748 struct partial_symtab
*psymtab
;
2750 if (objfile
->free_psymtabs
)
2752 psymtab
= objfile
->free_psymtabs
;
2753 objfile
->free_psymtabs
= psymtab
->next
;
2756 psymtab
= (struct partial_symtab
*)
2757 obstack_alloc (&objfile
->objfile_obstack
,
2758 sizeof (struct partial_symtab
));
2760 memset (psymtab
, 0, sizeof (struct partial_symtab
));
2761 psymtab
->filename
= obsavestring (filename
, strlen (filename
),
2762 &objfile
->objfile_obstack
);
2763 psymtab
->symtab
= NULL
;
2765 /* Prepend it to the psymtab list for the objfile it belongs to.
2766 Psymtabs are searched in most recent inserted -> least recent
2769 psymtab
->objfile
= objfile
;
2770 psymtab
->next
= objfile
->psymtabs
;
2771 objfile
->psymtabs
= psymtab
;
2774 struct partial_symtab
**prev_pst
;
2775 psymtab
->objfile
= objfile
;
2776 psymtab
->next
= NULL
;
2777 prev_pst
= &(objfile
->psymtabs
);
2778 while ((*prev_pst
) != NULL
)
2779 prev_pst
= &((*prev_pst
)->next
);
2780 (*prev_pst
) = psymtab
;
2788 discard_psymtab (struct partial_symtab
*pst
)
2790 struct partial_symtab
**prev_pst
;
2793 Empty psymtabs happen as a result of header files which don't
2794 have any symbols in them. There can be a lot of them. But this
2795 check is wrong, in that a psymtab with N_SLINE entries but
2796 nothing else is not empty, but we don't realize that. Fixing
2797 that without slowing things down might be tricky. */
2799 /* First, snip it out of the psymtab chain */
2801 prev_pst
= &(pst
->objfile
->psymtabs
);
2802 while ((*prev_pst
) != pst
)
2803 prev_pst
= &((*prev_pst
)->next
);
2804 (*prev_pst
) = pst
->next
;
2806 /* Next, put it on a free list for recycling */
2808 pst
->next
= pst
->objfile
->free_psymtabs
;
2809 pst
->objfile
->free_psymtabs
= pst
;
2813 /* Reset all data structures in gdb which may contain references to symbol
2817 clear_symtab_users (void)
2819 /* Someday, we should do better than this, by only blowing away
2820 the things that really need to be blown. */
2822 /* Clear the "current" symtab first, because it is no longer valid.
2823 breakpoint_re_set may try to access the current symtab. */
2824 clear_current_source_symtab_and_line ();
2827 breakpoint_re_set ();
2828 set_default_breakpoint (0, 0, 0, 0);
2829 clear_pc_function_cache ();
2830 observer_notify_new_objfile (NULL
);
2832 /* Clear globals which might have pointed into a removed objfile.
2833 FIXME: It's not clear which of these are supposed to persist
2834 between expressions and which ought to be reset each time. */
2835 expression_context_block
= NULL
;
2836 innermost_block
= NULL
;
2838 /* Varobj may refer to old symbols, perform a cleanup. */
2839 varobj_invalidate ();
2844 clear_symtab_users_cleanup (void *ignore
)
2846 clear_symtab_users ();
2849 /* clear_symtab_users_once:
2851 This function is run after symbol reading, or from a cleanup.
2852 If an old symbol table was obsoleted, the old symbol table
2853 has been blown away, but the other GDB data structures that may
2854 reference it have not yet been cleared or re-directed. (The old
2855 symtab was zapped, and the cleanup queued, in free_named_symtab()
2858 This function can be queued N times as a cleanup, or called
2859 directly; it will do all the work the first time, and then will be a
2860 no-op until the next time it is queued. This works by bumping a
2861 counter at queueing time. Much later when the cleanup is run, or at
2862 the end of symbol processing (in case the cleanup is discarded), if
2863 the queued count is greater than the "done-count", we do the work
2864 and set the done-count to the queued count. If the queued count is
2865 less than or equal to the done-count, we just ignore the call. This
2866 is needed because reading a single .o file will often replace many
2867 symtabs (one per .h file, for example), and we don't want to reset
2868 the breakpoints N times in the user's face.
2870 The reason we both queue a cleanup, and call it directly after symbol
2871 reading, is because the cleanup protects us in case of errors, but is
2872 discarded if symbol reading is successful. */
2875 /* FIXME: As free_named_symtabs is currently a big noop this function
2876 is no longer needed. */
2877 static void clear_symtab_users_once (void);
2879 static int clear_symtab_users_queued
;
2880 static int clear_symtab_users_done
;
2883 clear_symtab_users_once (void)
2885 /* Enforce once-per-`do_cleanups'-semantics */
2886 if (clear_symtab_users_queued
<= clear_symtab_users_done
)
2888 clear_symtab_users_done
= clear_symtab_users_queued
;
2890 clear_symtab_users ();
2894 /* Delete the specified psymtab, and any others that reference it. */
2897 cashier_psymtab (struct partial_symtab
*pst
)
2899 struct partial_symtab
*ps
, *pprev
= NULL
;
2902 /* Find its previous psymtab in the chain */
2903 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2912 /* Unhook it from the chain. */
2913 if (ps
== pst
->objfile
->psymtabs
)
2914 pst
->objfile
->psymtabs
= ps
->next
;
2916 pprev
->next
= ps
->next
;
2918 /* FIXME, we can't conveniently deallocate the entries in the
2919 partial_symbol lists (global_psymbols/static_psymbols) that
2920 this psymtab points to. These just take up space until all
2921 the psymtabs are reclaimed. Ditto the dependencies list and
2922 filename, which are all in the objfile_obstack. */
2924 /* We need to cashier any psymtab that has this one as a dependency... */
2926 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2928 for (i
= 0; i
< ps
->number_of_dependencies
; i
++)
2930 if (ps
->dependencies
[i
] == pst
)
2932 cashier_psymtab (ps
);
2933 goto again
; /* Must restart, chain has been munged. */
2940 /* If a symtab or psymtab for filename NAME is found, free it along
2941 with any dependent breakpoints, displays, etc.
2942 Used when loading new versions of object modules with the "add-file"
2943 command. This is only called on the top-level symtab or psymtab's name;
2944 it is not called for subsidiary files such as .h files.
2946 Return value is 1 if we blew away the environment, 0 if not.
2947 FIXME. The return value appears to never be used.
2949 FIXME. I think this is not the best way to do this. We should
2950 work on being gentler to the environment while still cleaning up
2951 all stray pointers into the freed symtab. */
2954 free_named_symtabs (char *name
)
2957 /* FIXME: With the new method of each objfile having it's own
2958 psymtab list, this function needs serious rethinking. In particular,
2959 why was it ever necessary to toss psymtabs with specific compilation
2960 unit filenames, as opposed to all psymtabs from a particular symbol
2962 Well, the answer is that some systems permit reloading of particular
2963 compilation units. We want to blow away any old info about these
2964 compilation units, regardless of which objfiles they arrived in. --gnu. */
2967 struct symtab
*prev
;
2968 struct partial_symtab
*ps
;
2969 struct blockvector
*bv
;
2972 /* We only wack things if the symbol-reload switch is set. */
2973 if (!symbol_reloading
)
2976 /* Some symbol formats have trouble providing file names... */
2977 if (name
== 0 || *name
== '\0')
2980 /* Look for a psymtab with the specified name. */
2983 for (ps
= partial_symtab_list
; ps
; ps
= ps
->next
)
2985 if (strcmp (name
, ps
->filename
) == 0)
2987 cashier_psymtab (ps
); /* Blow it away...and its little dog, too. */
2988 goto again2
; /* Must restart, chain has been munged */
2992 /* Look for a symtab with the specified name. */
2994 for (s
= symtab_list
; s
; s
= s
->next
)
2996 if (strcmp (name
, s
->filename
) == 0)
3003 if (s
== symtab_list
)
3004 symtab_list
= s
->next
;
3006 prev
->next
= s
->next
;
3008 /* For now, queue a delete for all breakpoints, displays, etc., whether
3009 or not they depend on the symtab being freed. This should be
3010 changed so that only those data structures affected are deleted. */
3012 /* But don't delete anything if the symtab is empty.
3013 This test is necessary due to a bug in "dbxread.c" that
3014 causes empty symtabs to be created for N_SO symbols that
3015 contain the pathname of the object file. (This problem
3016 has been fixed in GDB 3.9x). */
3018 bv
= BLOCKVECTOR (s
);
3019 if (BLOCKVECTOR_NBLOCKS (bv
) > 2
3020 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
))
3021 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)))
3023 complaint (&symfile_complaints
, _("Replacing old symbols for `%s'"),
3025 clear_symtab_users_queued
++;
3026 make_cleanup (clear_symtab_users_once
, 0);
3030 complaint (&symfile_complaints
, _("Empty symbol table found for `%s'"),
3037 /* It is still possible that some breakpoints will be affected
3038 even though no symtab was found, since the file might have
3039 been compiled without debugging, and hence not be associated
3040 with a symtab. In order to handle this correctly, we would need
3041 to keep a list of text address ranges for undebuggable files.
3042 For now, we do nothing, since this is a fairly obscure case. */
3046 /* FIXME, what about the minimal symbol table? */
3053 /* Allocate and partially fill a partial symtab. It will be
3054 completely filled at the end of the symbol list.
3056 FILENAME is the name of the symbol-file we are reading from. */
3058 struct partial_symtab
*
3059 start_psymtab_common (struct objfile
*objfile
,
3060 struct section_offsets
*section_offsets
, char *filename
,
3061 CORE_ADDR textlow
, struct partial_symbol
**global_syms
,
3062 struct partial_symbol
**static_syms
)
3064 struct partial_symtab
*psymtab
;
3066 psymtab
= allocate_psymtab (filename
, objfile
);
3067 psymtab
->section_offsets
= section_offsets
;
3068 psymtab
->textlow
= textlow
;
3069 psymtab
->texthigh
= psymtab
->textlow
; /* default */
3070 psymtab
->globals_offset
= global_syms
- objfile
->global_psymbols
.list
;
3071 psymtab
->statics_offset
= static_syms
- objfile
->static_psymbols
.list
;
3075 /* Helper function, initialises partial symbol structure and stashes
3076 it into objfile's bcache. Note that our caching mechanism will
3077 use all fields of struct partial_symbol to determine hash value of the
3078 structure. In other words, having two symbols with the same name but
3079 different domain (or address) is possible and correct. */
3081 static const struct partial_symbol
*
3082 add_psymbol_to_bcache (char *name
, int namelength
, domain_enum domain
,
3083 enum address_class
class,
3084 long val
, /* Value as a long */
3085 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
3086 enum language language
, struct objfile
*objfile
,
3090 /* psymbol is static so that there will be no uninitialized gaps in the
3091 structure which might contain random data, causing cache misses in
3093 static struct partial_symbol psymbol
;
3095 if (name
[namelength
] != '\0')
3097 buf
= alloca (namelength
+ 1);
3098 /* Create local copy of the partial symbol */
3099 memcpy (buf
, name
, namelength
);
3100 buf
[namelength
] = '\0';
3102 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
3105 SYMBOL_VALUE (&psymbol
) = val
;
3109 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
3111 SYMBOL_SECTION (&psymbol
) = 0;
3112 SYMBOL_LANGUAGE (&psymbol
) = language
;
3113 PSYMBOL_DOMAIN (&psymbol
) = domain
;
3114 PSYMBOL_CLASS (&psymbol
) = class;
3116 SYMBOL_SET_NAMES (&psymbol
, buf
, namelength
, objfile
);
3118 /* Stash the partial symbol away in the cache */
3119 return bcache_full (&psymbol
, sizeof (struct partial_symbol
),
3120 objfile
->psymbol_cache
, added
);
3123 /* Helper function, adds partial symbol to the given partial symbol
3127 append_psymbol_to_list (struct psymbol_allocation_list
*list
,
3128 const struct partial_symbol
*psym
,
3129 struct objfile
*objfile
)
3131 if (list
->next
>= list
->list
+ list
->size
)
3132 extend_psymbol_list (list
, objfile
);
3133 *list
->next
++ = (struct partial_symbol
*) psym
;
3134 OBJSTAT (objfile
, n_psyms
++);
3137 /* Add a symbol with a long value to a psymtab.
3138 Since one arg is a struct, we pass in a ptr and deref it (sigh).
3139 Return the partial symbol that has been added. */
3141 /* NOTE: carlton/2003-09-11: The reason why we return the partial
3142 symbol is so that callers can get access to the symbol's demangled
3143 name, which they don't have any cheap way to determine otherwise.
3144 (Currenly, dwarf2read.c is the only file who uses that information,
3145 though it's possible that other readers might in the future.)
3146 Elena wasn't thrilled about that, and I don't blame her, but we
3147 couldn't come up with a better way to get that information. If
3148 it's needed in other situations, we could consider breaking up
3149 SYMBOL_SET_NAMES to provide access to the demangled name lookup
3152 const struct partial_symbol
*
3153 add_psymbol_to_list (char *name
, int namelength
, domain_enum domain
,
3154 enum address_class
class,
3155 struct psymbol_allocation_list
*list
,
3156 long val
, /* Value as a long */
3157 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
3158 enum language language
, struct objfile
*objfile
)
3160 const struct partial_symbol
*psym
;
3164 /* Stash the partial symbol away in the cache */
3165 psym
= add_psymbol_to_bcache (name
, namelength
, domain
, class,
3166 val
, coreaddr
, language
, objfile
, &added
);
3168 /* Do not duplicate global partial symbols. */
3169 if (list
== &objfile
->global_psymbols
3173 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
3174 append_psymbol_to_list (list
, psym
, objfile
);
3178 /* Initialize storage for partial symbols. */
3181 init_psymbol_list (struct objfile
*objfile
, int total_symbols
)
3183 /* Free any previously allocated psymbol lists. */
3185 if (objfile
->global_psymbols
.list
)
3187 xfree (objfile
->global_psymbols
.list
);
3189 if (objfile
->static_psymbols
.list
)
3191 xfree (objfile
->static_psymbols
.list
);
3194 /* Current best guess is that approximately a twentieth
3195 of the total symbols (in a debugging file) are global or static
3198 objfile
->global_psymbols
.size
= total_symbols
/ 10;
3199 objfile
->static_psymbols
.size
= total_symbols
/ 10;
3201 if (objfile
->global_psymbols
.size
> 0)
3203 objfile
->global_psymbols
.next
=
3204 objfile
->global_psymbols
.list
= (struct partial_symbol
**)
3205 xmalloc ((objfile
->global_psymbols
.size
3206 * sizeof (struct partial_symbol
*)));
3208 if (objfile
->static_psymbols
.size
> 0)
3210 objfile
->static_psymbols
.next
=
3211 objfile
->static_psymbols
.list
= (struct partial_symbol
**)
3212 xmalloc ((objfile
->static_psymbols
.size
3213 * sizeof (struct partial_symbol
*)));
3218 The following code implements an abstraction for debugging overlay sections.
3220 The target model is as follows:
3221 1) The gnu linker will permit multiple sections to be mapped into the
3222 same VMA, each with its own unique LMA (or load address).
3223 2) It is assumed that some runtime mechanism exists for mapping the
3224 sections, one by one, from the load address into the VMA address.
3225 3) This code provides a mechanism for gdb to keep track of which
3226 sections should be considered to be mapped from the VMA to the LMA.
3227 This information is used for symbol lookup, and memory read/write.
3228 For instance, if a section has been mapped then its contents
3229 should be read from the VMA, otherwise from the LMA.
3231 Two levels of debugger support for overlays are available. One is
3232 "manual", in which the debugger relies on the user to tell it which
3233 overlays are currently mapped. This level of support is
3234 implemented entirely in the core debugger, and the information about
3235 whether a section is mapped is kept in the objfile->obj_section table.
3237 The second level of support is "automatic", and is only available if
3238 the target-specific code provides functionality to read the target's
3239 overlay mapping table, and translate its contents for the debugger
3240 (by updating the mapped state information in the obj_section tables).
3242 The interface is as follows:
3244 overlay map <name> -- tell gdb to consider this section mapped
3245 overlay unmap <name> -- tell gdb to consider this section unmapped
3246 overlay list -- list the sections that GDB thinks are mapped
3247 overlay read-target -- get the target's state of what's mapped
3248 overlay off/manual/auto -- set overlay debugging state
3249 Functional interface:
3250 find_pc_mapped_section(pc): if the pc is in the range of a mapped
3251 section, return that section.
3252 find_pc_overlay(pc): find any overlay section that contains
3253 the pc, either in its VMA or its LMA
3254 section_is_mapped(sect): true if overlay is marked as mapped
3255 section_is_overlay(sect): true if section's VMA != LMA
3256 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
3257 pc_in_unmapped_range(...): true if pc belongs to section's LMA
3258 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
3259 overlay_mapped_address(...): map an address from section's LMA to VMA
3260 overlay_unmapped_address(...): map an address from section's VMA to LMA
3261 symbol_overlayed_address(...): Return a "current" address for symbol:
3262 either in VMA or LMA depending on whether
3263 the symbol's section is currently mapped
3266 /* Overlay debugging state: */
3268 enum overlay_debugging_state overlay_debugging
= ovly_off
;
3269 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
3271 /* Function: section_is_overlay (SECTION)
3272 Returns true if SECTION has VMA not equal to LMA, ie.
3273 SECTION is loaded at an address different from where it will "run". */
3276 section_is_overlay (struct obj_section
*section
)
3278 if (overlay_debugging
&& section
)
3280 bfd
*abfd
= section
->objfile
->obfd
;
3281 asection
*bfd_section
= section
->the_bfd_section
;
3283 if (bfd_section_lma (abfd
, bfd_section
) != 0
3284 && bfd_section_lma (abfd
, bfd_section
)
3285 != bfd_section_vma (abfd
, bfd_section
))
3292 /* Function: overlay_invalidate_all (void)
3293 Invalidate the mapped state of all overlay sections (mark it as stale). */
3296 overlay_invalidate_all (void)
3298 struct objfile
*objfile
;
3299 struct obj_section
*sect
;
3301 ALL_OBJSECTIONS (objfile
, sect
)
3302 if (section_is_overlay (sect
))
3303 sect
->ovly_mapped
= -1;
3306 /* Function: section_is_mapped (SECTION)
3307 Returns true if section is an overlay, and is currently mapped.
3309 Access to the ovly_mapped flag is restricted to this function, so
3310 that we can do automatic update. If the global flag
3311 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
3312 overlay_invalidate_all. If the mapped state of the particular
3313 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
3316 section_is_mapped (struct obj_section
*osect
)
3318 if (osect
== 0 || !section_is_overlay (osect
))
3321 switch (overlay_debugging
)
3325 return 0; /* overlay debugging off */
3326 case ovly_auto
: /* overlay debugging automatic */
3327 /* Unles there is a gdbarch_overlay_update function,
3328 there's really nothing useful to do here (can't really go auto) */
3329 if (gdbarch_overlay_update_p (current_gdbarch
))
3331 if (overlay_cache_invalid
)
3333 overlay_invalidate_all ();
3334 overlay_cache_invalid
= 0;
3336 if (osect
->ovly_mapped
== -1)
3337 gdbarch_overlay_update (current_gdbarch
, osect
);
3339 /* fall thru to manual case */
3340 case ovly_on
: /* overlay debugging manual */
3341 return osect
->ovly_mapped
== 1;
3345 /* Function: pc_in_unmapped_range
3346 If PC falls into the lma range of SECTION, return true, else false. */
3349 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3351 if (section_is_overlay (section
))
3353 bfd
*abfd
= section
->objfile
->obfd
;
3354 asection
*bfd_section
= section
->the_bfd_section
;
3356 /* We assume the LMA is relocated by the same offset as the VMA. */
3357 bfd_vma size
= bfd_get_section_size (bfd_section
);
3358 CORE_ADDR offset
= obj_section_offset (section
);
3360 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
3361 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
3368 /* Function: pc_in_mapped_range
3369 If PC falls into the vma range of SECTION, return true, else false. */
3372 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3374 if (section_is_overlay (section
))
3376 if (obj_section_addr (section
) <= pc
3377 && pc
< obj_section_endaddr (section
))
3385 /* Return true if the mapped ranges of sections A and B overlap, false
3388 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
3390 CORE_ADDR a_start
= obj_section_addr (a
);
3391 CORE_ADDR a_end
= obj_section_endaddr (a
);
3392 CORE_ADDR b_start
= obj_section_addr (b
);
3393 CORE_ADDR b_end
= obj_section_endaddr (b
);
3395 return (a_start
< b_end
&& b_start
< a_end
);
3398 /* Function: overlay_unmapped_address (PC, SECTION)
3399 Returns the address corresponding to PC in the unmapped (load) range.
3400 May be the same as PC. */
3403 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3405 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
3407 bfd
*abfd
= section
->objfile
->obfd
;
3408 asection
*bfd_section
= section
->the_bfd_section
;
3410 return pc
+ bfd_section_lma (abfd
, bfd_section
)
3411 - bfd_section_vma (abfd
, bfd_section
);
3417 /* Function: overlay_mapped_address (PC, SECTION)
3418 Returns the address corresponding to PC in the mapped (runtime) range.
3419 May be the same as PC. */
3422 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3424 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3426 bfd
*abfd
= section
->objfile
->obfd
;
3427 asection
*bfd_section
= section
->the_bfd_section
;
3429 return pc
+ bfd_section_vma (abfd
, bfd_section
)
3430 - bfd_section_lma (abfd
, bfd_section
);
3437 /* Function: symbol_overlayed_address
3438 Return one of two addresses (relative to the VMA or to the LMA),
3439 depending on whether the section is mapped or not. */
3442 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3444 if (overlay_debugging
)
3446 /* If the symbol has no section, just return its regular address. */
3449 /* If the symbol's section is not an overlay, just return its address */
3450 if (!section_is_overlay (section
))
3452 /* If the symbol's section is mapped, just return its address */
3453 if (section_is_mapped (section
))
3456 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3457 * then return its LOADED address rather than its vma address!!
3459 return overlay_unmapped_address (address
, section
);
3464 /* Function: find_pc_overlay (PC)
3465 Return the best-match overlay section for PC:
3466 If PC matches a mapped overlay section's VMA, return that section.
3467 Else if PC matches an unmapped section's VMA, return that section.
3468 Else if PC matches an unmapped section's LMA, return that section. */
3470 struct obj_section
*
3471 find_pc_overlay (CORE_ADDR pc
)
3473 struct objfile
*objfile
;
3474 struct obj_section
*osect
, *best_match
= NULL
;
3476 if (overlay_debugging
)
3477 ALL_OBJSECTIONS (objfile
, osect
)
3478 if (section_is_overlay (osect
))
3480 if (pc_in_mapped_range (pc
, osect
))
3482 if (section_is_mapped (osect
))
3487 else if (pc_in_unmapped_range (pc
, osect
))
3493 /* Function: find_pc_mapped_section (PC)
3494 If PC falls into the VMA address range of an overlay section that is
3495 currently marked as MAPPED, return that section. Else return NULL. */
3497 struct obj_section
*
3498 find_pc_mapped_section (CORE_ADDR pc
)
3500 struct objfile
*objfile
;
3501 struct obj_section
*osect
;
3503 if (overlay_debugging
)
3504 ALL_OBJSECTIONS (objfile
, osect
)
3505 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3511 /* Function: list_overlays_command
3512 Print a list of mapped sections and their PC ranges */
3515 list_overlays_command (char *args
, int from_tty
)
3518 struct objfile
*objfile
;
3519 struct obj_section
*osect
;
3521 if (overlay_debugging
)
3522 ALL_OBJSECTIONS (objfile
, osect
)
3523 if (section_is_mapped (osect
))
3529 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3530 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3531 size
= bfd_get_section_size (osect
->the_bfd_section
);
3532 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3534 printf_filtered ("Section %s, loaded at ", name
);
3535 fputs_filtered (paddress (lma
), gdb_stdout
);
3536 puts_filtered (" - ");
3537 fputs_filtered (paddress (lma
+ size
), gdb_stdout
);
3538 printf_filtered (", mapped at ");
3539 fputs_filtered (paddress (vma
), gdb_stdout
);
3540 puts_filtered (" - ");
3541 fputs_filtered (paddress (vma
+ size
), gdb_stdout
);
3542 puts_filtered ("\n");
3547 printf_filtered (_("No sections are mapped.\n"));
3550 /* Function: map_overlay_command
3551 Mark the named section as mapped (ie. residing at its VMA address). */
3554 map_overlay_command (char *args
, int from_tty
)
3556 struct objfile
*objfile
, *objfile2
;
3557 struct obj_section
*sec
, *sec2
;
3559 if (!overlay_debugging
)
3561 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3562 the 'overlay manual' command."));
3564 if (args
== 0 || *args
== 0)
3565 error (_("Argument required: name of an overlay section"));
3567 /* First, find a section matching the user supplied argument */
3568 ALL_OBJSECTIONS (objfile
, sec
)
3569 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3571 /* Now, check to see if the section is an overlay. */
3572 if (!section_is_overlay (sec
))
3573 continue; /* not an overlay section */
3575 /* Mark the overlay as "mapped" */
3576 sec
->ovly_mapped
= 1;
3578 /* Next, make a pass and unmap any sections that are
3579 overlapped by this new section: */
3580 ALL_OBJSECTIONS (objfile2
, sec2
)
3581 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
, sec2
))
3584 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3585 bfd_section_name (objfile
->obfd
,
3586 sec2
->the_bfd_section
));
3587 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
3591 error (_("No overlay section called %s"), args
);
3594 /* Function: unmap_overlay_command
3595 Mark the overlay section as unmapped
3596 (ie. resident in its LMA address range, rather than the VMA range). */
3599 unmap_overlay_command (char *args
, int from_tty
)
3601 struct objfile
*objfile
;
3602 struct obj_section
*sec
;
3604 if (!overlay_debugging
)
3606 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3607 the 'overlay manual' command."));
3609 if (args
== 0 || *args
== 0)
3610 error (_("Argument required: name of an overlay section"));
3612 /* First, find a section matching the user supplied argument */
3613 ALL_OBJSECTIONS (objfile
, sec
)
3614 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3616 if (!sec
->ovly_mapped
)
3617 error (_("Section %s is not mapped"), args
);
3618 sec
->ovly_mapped
= 0;
3621 error (_("No overlay section called %s"), args
);
3624 /* Function: overlay_auto_command
3625 A utility command to turn on overlay debugging.
3626 Possibly this should be done via a set/show command. */
3629 overlay_auto_command (char *args
, int from_tty
)
3631 overlay_debugging
= ovly_auto
;
3632 enable_overlay_breakpoints ();
3634 printf_unfiltered (_("Automatic overlay debugging enabled."));
3637 /* Function: overlay_manual_command
3638 A utility command to turn on overlay debugging.
3639 Possibly this should be done via a set/show command. */
3642 overlay_manual_command (char *args
, int from_tty
)
3644 overlay_debugging
= ovly_on
;
3645 disable_overlay_breakpoints ();
3647 printf_unfiltered (_("Overlay debugging enabled."));
3650 /* Function: overlay_off_command
3651 A utility command to turn on overlay debugging.
3652 Possibly this should be done via a set/show command. */
3655 overlay_off_command (char *args
, int from_tty
)
3657 overlay_debugging
= ovly_off
;
3658 disable_overlay_breakpoints ();
3660 printf_unfiltered (_("Overlay debugging disabled."));
3664 overlay_load_command (char *args
, int from_tty
)
3666 if (gdbarch_overlay_update_p (current_gdbarch
))
3667 gdbarch_overlay_update (current_gdbarch
, NULL
);
3669 error (_("This target does not know how to read its overlay state."));
3672 /* Function: overlay_command
3673 A place-holder for a mis-typed command */
3675 /* Command list chain containing all defined "overlay" subcommands. */
3676 struct cmd_list_element
*overlaylist
;
3679 overlay_command (char *args
, int from_tty
)
3682 ("\"overlay\" must be followed by the name of an overlay command.\n");
3683 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3687 /* Target Overlays for the "Simplest" overlay manager:
3689 This is GDB's default target overlay layer. It works with the
3690 minimal overlay manager supplied as an example by Cygnus. The
3691 entry point is via a function pointer "gdbarch_overlay_update",
3692 so targets that use a different runtime overlay manager can
3693 substitute their own overlay_update function and take over the
3696 The overlay_update function pokes around in the target's data structures
3697 to see what overlays are mapped, and updates GDB's overlay mapping with
3700 In this simple implementation, the target data structures are as follows:
3701 unsigned _novlys; /# number of overlay sections #/
3702 unsigned _ovly_table[_novlys][4] = {
3703 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3704 {..., ..., ..., ...},
3706 unsigned _novly_regions; /# number of overlay regions #/
3707 unsigned _ovly_region_table[_novly_regions][3] = {
3708 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3711 These functions will attempt to update GDB's mappedness state in the
3712 symbol section table, based on the target's mappedness state.
3714 To do this, we keep a cached copy of the target's _ovly_table, and
3715 attempt to detect when the cached copy is invalidated. The main
3716 entry point is "simple_overlay_update(SECT), which looks up SECT in
3717 the cached table and re-reads only the entry for that section from
3718 the target (whenever possible).
3721 /* Cached, dynamically allocated copies of the target data structures: */
3722 static unsigned (*cache_ovly_table
)[4] = 0;
3724 static unsigned (*cache_ovly_region_table
)[3] = 0;
3726 static unsigned cache_novlys
= 0;
3728 static unsigned cache_novly_regions
= 0;
3730 static CORE_ADDR cache_ovly_table_base
= 0;
3732 static CORE_ADDR cache_ovly_region_table_base
= 0;
3736 VMA
, SIZE
, LMA
, MAPPED
3738 #define TARGET_LONG_BYTES (gdbarch_long_bit (current_gdbarch) \
3741 /* Throw away the cached copy of _ovly_table */
3743 simple_free_overlay_table (void)
3745 if (cache_ovly_table
)
3746 xfree (cache_ovly_table
);
3748 cache_ovly_table
= NULL
;
3749 cache_ovly_table_base
= 0;
3753 /* Throw away the cached copy of _ovly_region_table */
3755 simple_free_overlay_region_table (void)
3757 if (cache_ovly_region_table
)
3758 xfree (cache_ovly_region_table
);
3759 cache_novly_regions
= 0;
3760 cache_ovly_region_table
= NULL
;
3761 cache_ovly_region_table_base
= 0;
3765 /* Read an array of ints from the target into a local buffer.
3766 Convert to host order. int LEN is number of ints */
3768 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
, int len
)
3770 /* FIXME (alloca): Not safe if array is very large. */
3771 gdb_byte
*buf
= alloca (len
* TARGET_LONG_BYTES
);
3774 read_memory (memaddr
, buf
, len
* TARGET_LONG_BYTES
);
3775 for (i
= 0; i
< len
; i
++)
3776 myaddr
[i
] = extract_unsigned_integer (TARGET_LONG_BYTES
* i
+ buf
,
3780 /* Find and grab a copy of the target _ovly_table
3781 (and _novlys, which is needed for the table's size) */
3783 simple_read_overlay_table (void)
3785 struct minimal_symbol
*novlys_msym
, *ovly_table_msym
;
3787 simple_free_overlay_table ();
3788 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3791 error (_("Error reading inferior's overlay table: "
3792 "couldn't find `_novlys' variable\n"
3793 "in inferior. Use `overlay manual' mode."));
3797 ovly_table_msym
= lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3798 if (! ovly_table_msym
)
3800 error (_("Error reading inferior's overlay table: couldn't find "
3801 "`_ovly_table' array\n"
3802 "in inferior. Use `overlay manual' mode."));
3806 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
), 4);
3808 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3809 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3810 read_target_long_array (cache_ovly_table_base
,
3811 (unsigned int *) cache_ovly_table
,
3814 return 1; /* SUCCESS */
3818 /* Find and grab a copy of the target _ovly_region_table
3819 (and _novly_regions, which is needed for the table's size) */
3821 simple_read_overlay_region_table (void)
3823 struct minimal_symbol
*msym
;
3825 simple_free_overlay_region_table ();
3826 msym
= lookup_minimal_symbol ("_novly_regions", NULL
, NULL
);
3828 cache_novly_regions
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
3830 return 0; /* failure */
3831 cache_ovly_region_table
= (void *) xmalloc (cache_novly_regions
* 12);
3832 if (cache_ovly_region_table
!= NULL
)
3834 msym
= lookup_minimal_symbol ("_ovly_region_table", NULL
, NULL
);
3837 cache_ovly_region_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3838 read_target_long_array (cache_ovly_region_table_base
,
3839 (unsigned int *) cache_ovly_region_table
,
3840 cache_novly_regions
* 3);
3843 return 0; /* failure */
3846 return 0; /* failure */
3847 return 1; /* SUCCESS */
3851 /* Function: simple_overlay_update_1
3852 A helper function for simple_overlay_update. Assuming a cached copy
3853 of _ovly_table exists, look through it to find an entry whose vma,
3854 lma and size match those of OSECT. Re-read the entry and make sure
3855 it still matches OSECT (else the table may no longer be valid).
3856 Set OSECT's mapped state to match the entry. Return: 1 for
3857 success, 0 for failure. */
3860 simple_overlay_update_1 (struct obj_section
*osect
)
3863 bfd
*obfd
= osect
->objfile
->obfd
;
3864 asection
*bsect
= osect
->the_bfd_section
;
3866 size
= bfd_get_section_size (osect
->the_bfd_section
);
3867 for (i
= 0; i
< cache_novlys
; i
++)
3868 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3869 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3870 /* && cache_ovly_table[i][SIZE] == size */ )
3872 read_target_long_array (cache_ovly_table_base
+ i
* TARGET_LONG_BYTES
,
3873 (unsigned int *) cache_ovly_table
[i
], 4);
3874 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3875 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3876 /* && cache_ovly_table[i][SIZE] == size */ )
3878 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3881 else /* Warning! Warning! Target's ovly table has changed! */
3887 /* Function: simple_overlay_update
3888 If OSECT is NULL, then update all sections' mapped state
3889 (after re-reading the entire target _ovly_table).
3890 If OSECT is non-NULL, then try to find a matching entry in the
3891 cached ovly_table and update only OSECT's mapped state.
3892 If a cached entry can't be found or the cache isn't valid, then
3893 re-read the entire cache, and go ahead and update all sections. */
3896 simple_overlay_update (struct obj_section
*osect
)
3898 struct objfile
*objfile
;
3900 /* Were we given an osect to look up? NULL means do all of them. */
3902 /* Have we got a cached copy of the target's overlay table? */
3903 if (cache_ovly_table
!= NULL
)
3904 /* Does its cached location match what's currently in the symtab? */
3905 if (cache_ovly_table_base
==
3906 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL
, NULL
)))
3907 /* Then go ahead and try to look up this single section in the cache */
3908 if (simple_overlay_update_1 (osect
))
3909 /* Found it! We're done. */
3912 /* Cached table no good: need to read the entire table anew.
3913 Or else we want all the sections, in which case it's actually
3914 more efficient to read the whole table in one block anyway. */
3916 if (! simple_read_overlay_table ())
3919 /* Now may as well update all sections, even if only one was requested. */
3920 ALL_OBJSECTIONS (objfile
, osect
)
3921 if (section_is_overlay (osect
))
3924 bfd
*obfd
= osect
->objfile
->obfd
;
3925 asection
*bsect
= osect
->the_bfd_section
;
3927 size
= bfd_get_section_size (bsect
);
3928 for (i
= 0; i
< cache_novlys
; i
++)
3929 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3930 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3931 /* && cache_ovly_table[i][SIZE] == size */ )
3932 { /* obj_section matches i'th entry in ovly_table */
3933 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3934 break; /* finished with inner for loop: break out */
3939 /* Set the output sections and output offsets for section SECTP in
3940 ABFD. The relocation code in BFD will read these offsets, so we
3941 need to be sure they're initialized. We map each section to itself,
3942 with no offset; this means that SECTP->vma will be honored. */
3945 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3947 sectp
->output_section
= sectp
;
3948 sectp
->output_offset
= 0;
3951 /* Relocate the contents of a debug section SECTP in ABFD. The
3952 contents are stored in BUF if it is non-NULL, or returned in a
3953 malloc'd buffer otherwise.
3955 For some platforms and debug info formats, shared libraries contain
3956 relocations against the debug sections (particularly for DWARF-2;
3957 one affected platform is PowerPC GNU/Linux, although it depends on
3958 the version of the linker in use). Also, ELF object files naturally
3959 have unresolved relocations for their debug sections. We need to apply
3960 the relocations in order to get the locations of symbols correct. */
3963 symfile_relocate_debug_section (bfd
*abfd
, asection
*sectp
, bfd_byte
*buf
)
3965 /* We're only interested in debugging sections with relocation
3967 if ((sectp
->flags
& SEC_RELOC
) == 0)
3969 if ((sectp
->flags
& SEC_DEBUGGING
) == 0)
3972 /* We will handle section offsets properly elsewhere, so relocate as if
3973 all sections begin at 0. */
3974 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3976 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3979 struct symfile_segment_data
*
3980 get_symfile_segment_data (bfd
*abfd
)
3982 struct sym_fns
*sf
= find_sym_fns (abfd
);
3987 return sf
->sym_segments (abfd
);
3991 free_symfile_segment_data (struct symfile_segment_data
*data
)
3993 xfree (data
->segment_bases
);
3994 xfree (data
->segment_sizes
);
3995 xfree (data
->segment_info
);
4001 - DATA, containing segment addresses from the object file ABFD, and
4002 the mapping from ABFD's sections onto the segments that own them,
4004 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
4005 segment addresses reported by the target,
4006 store the appropriate offsets for each section in OFFSETS.
4008 If there are fewer entries in SEGMENT_BASES than there are segments
4009 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
4011 If there are more entries, then ignore the extra. The target may
4012 not be able to distinguish between an empty data segment and a
4013 missing data segment; a missing text segment is less plausible. */
4015 symfile_map_offsets_to_segments (bfd
*abfd
, struct symfile_segment_data
*data
,
4016 struct section_offsets
*offsets
,
4017 int num_segment_bases
,
4018 const CORE_ADDR
*segment_bases
)
4023 /* It doesn't make sense to call this function unless you have some
4024 segment base addresses. */
4025 gdb_assert (segment_bases
> 0);
4027 /* If we do not have segment mappings for the object file, we
4028 can not relocate it by segments. */
4029 gdb_assert (data
!= NULL
);
4030 gdb_assert (data
->num_segments
> 0);
4032 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
4034 int which
= data
->segment_info
[i
];
4036 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
4038 /* Don't bother computing offsets for sections that aren't
4039 loaded as part of any segment. */
4043 /* Use the last SEGMENT_BASES entry as the address of any extra
4044 segments mentioned in DATA->segment_info. */
4045 if (which
> num_segment_bases
)
4046 which
= num_segment_bases
;
4048 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
4049 - data
->segment_bases
[which
- 1]);
4056 symfile_find_segment_sections (struct objfile
*objfile
)
4058 bfd
*abfd
= objfile
->obfd
;
4061 struct symfile_segment_data
*data
;
4063 data
= get_symfile_segment_data (objfile
->obfd
);
4067 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
4069 free_symfile_segment_data (data
);
4073 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
4076 int which
= data
->segment_info
[i
];
4080 if (objfile
->sect_index_text
== -1)
4081 objfile
->sect_index_text
= sect
->index
;
4083 if (objfile
->sect_index_rodata
== -1)
4084 objfile
->sect_index_rodata
= sect
->index
;
4086 else if (which
== 2)
4088 if (objfile
->sect_index_data
== -1)
4089 objfile
->sect_index_data
= sect
->index
;
4091 if (objfile
->sect_index_bss
== -1)
4092 objfile
->sect_index_bss
= sect
->index
;
4096 free_symfile_segment_data (data
);
4100 _initialize_symfile (void)
4102 struct cmd_list_element
*c
;
4104 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
4105 Load symbol table from executable file FILE.\n\
4106 The `file' command can also load symbol tables, as well as setting the file\n\
4107 to execute."), &cmdlist
);
4108 set_cmd_completer (c
, filename_completer
);
4110 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
4111 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
4112 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
4113 ADDR is the starting address of the file's text.\n\
4114 The optional arguments are section-name section-address pairs and\n\
4115 should be specified if the data and bss segments are not contiguous\n\
4116 with the text. SECT is a section name to be loaded at SECT_ADDR."),
4118 set_cmd_completer (c
, filename_completer
);
4120 c
= add_cmd ("add-shared-symbol-files", class_files
,
4121 add_shared_symbol_files_command
, _("\
4122 Load the symbols from shared objects in the dynamic linker's link map."),
4124 c
= add_alias_cmd ("assf", "add-shared-symbol-files", class_files
, 1,
4127 c
= add_cmd ("load", class_files
, load_command
, _("\
4128 Dynamically load FILE into the running program, and record its symbols\n\
4129 for access from GDB.\n\
4130 A load OFFSET may also be given."), &cmdlist
);
4131 set_cmd_completer (c
, filename_completer
);
4133 add_setshow_boolean_cmd ("symbol-reloading", class_support
,
4134 &symbol_reloading
, _("\
4135 Set dynamic symbol table reloading multiple times in one run."), _("\
4136 Show dynamic symbol table reloading multiple times in one run."), NULL
,
4138 show_symbol_reloading
,
4139 &setlist
, &showlist
);
4141 add_prefix_cmd ("overlay", class_support
, overlay_command
,
4142 _("Commands for debugging overlays."), &overlaylist
,
4143 "overlay ", 0, &cmdlist
);
4145 add_com_alias ("ovly", "overlay", class_alias
, 1);
4146 add_com_alias ("ov", "overlay", class_alias
, 1);
4148 add_cmd ("map-overlay", class_support
, map_overlay_command
,
4149 _("Assert that an overlay section is mapped."), &overlaylist
);
4151 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
4152 _("Assert that an overlay section is unmapped."), &overlaylist
);
4154 add_cmd ("list-overlays", class_support
, list_overlays_command
,
4155 _("List mappings of overlay sections."), &overlaylist
);
4157 add_cmd ("manual", class_support
, overlay_manual_command
,
4158 _("Enable overlay debugging."), &overlaylist
);
4159 add_cmd ("off", class_support
, overlay_off_command
,
4160 _("Disable overlay debugging."), &overlaylist
);
4161 add_cmd ("auto", class_support
, overlay_auto_command
,
4162 _("Enable automatic overlay debugging."), &overlaylist
);
4163 add_cmd ("load-target", class_support
, overlay_load_command
,
4164 _("Read the overlay mapping state from the target."), &overlaylist
);
4166 /* Filename extension to source language lookup table: */
4167 init_filename_language_table ();
4168 add_setshow_string_noescape_cmd ("extension-language", class_files
,
4170 Set mapping between filename extension and source language."), _("\
4171 Show mapping between filename extension and source language."), _("\
4172 Usage: set extension-language .foo bar"),
4173 set_ext_lang_command
,
4175 &setlist
, &showlist
);
4177 add_info ("extensions", info_ext_lang_command
,
4178 _("All filename extensions associated with a source language."));
4180 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
4181 &debug_file_directory
, _("\
4182 Set the directory where separate debug symbols are searched for."), _("\
4183 Show the directory where separate debug symbols are searched for."), _("\
4184 Separate debug symbols are first searched for in the same\n\
4185 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
4186 and lastly at the path of the directory of the binary with\n\
4187 the global debug-file directory prepended."),
4189 show_debug_file_directory
,
4190 &setlist
, &showlist
);
4192 add_setshow_boolean_cmd ("symbol-loading", no_class
,
4193 &print_symbol_loading
, _("\
4194 Set printing of symbol loading messages."), _("\
4195 Show printing of symbol loading messages."), NULL
,
4198 &setprintlist
, &showprintlist
);