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"
57 #include <sys/types.h>
59 #include "gdb_string.h"
66 int (*deprecated_ui_load_progress_hook
) (const char *section
, unsigned long num
);
67 void (*deprecated_show_load_progress
) (const char *section
,
68 unsigned long section_sent
,
69 unsigned long section_size
,
70 unsigned long total_sent
,
71 unsigned long total_size
);
72 void (*deprecated_pre_add_symbol_hook
) (const char *);
73 void (*deprecated_post_add_symbol_hook
) (void);
75 static void clear_symtab_users_cleanup (void *ignore
);
77 /* Global variables owned by this file */
78 int readnow_symbol_files
; /* Read full symbols immediately */
80 /* External variables and functions referenced. */
82 extern void report_transfer_performance (unsigned long, time_t, time_t);
84 /* Functions this file defines */
87 static int simple_read_overlay_region_table (void);
88 static void simple_free_overlay_region_table (void);
91 static void load_command (char *, int);
93 static void symbol_file_add_main_1 (char *args
, int from_tty
, int flags
);
95 static void add_symbol_file_command (char *, int);
97 static void add_shared_symbol_files_command (char *, int);
99 static void reread_separate_symbols (struct objfile
*objfile
);
101 static void cashier_psymtab (struct partial_symtab
*);
103 bfd
*symfile_bfd_open (char *);
105 int get_section_index (struct objfile
*, char *);
107 static struct sym_fns
*find_sym_fns (bfd
*);
109 static void decrement_reading_symtab (void *);
111 static void overlay_invalidate_all (void);
113 static int overlay_is_mapped (struct obj_section
*);
115 void list_overlays_command (char *, int);
117 void map_overlay_command (char *, int);
119 void unmap_overlay_command (char *, int);
121 static void overlay_auto_command (char *, int);
123 static void overlay_manual_command (char *, int);
125 static void overlay_off_command (char *, int);
127 static void overlay_load_command (char *, int);
129 static void overlay_command (char *, int);
131 static void simple_free_overlay_table (void);
133 static void read_target_long_array (CORE_ADDR
, unsigned int *, int);
135 static int simple_read_overlay_table (void);
137 static int simple_overlay_update_1 (struct obj_section
*);
139 static void add_filename_language (char *ext
, enum language lang
);
141 static void info_ext_lang_command (char *args
, int from_tty
);
143 static char *find_separate_debug_file (struct objfile
*objfile
);
145 static void init_filename_language_table (void);
147 static void symfile_find_segment_sections (struct objfile
*objfile
);
149 void _initialize_symfile (void);
151 /* List of all available sym_fns. On gdb startup, each object file reader
152 calls add_symtab_fns() to register information on each format it is
155 static struct sym_fns
*symtab_fns
= NULL
;
157 /* Flag for whether user will be reloading symbols multiple times.
158 Defaults to ON for VxWorks, otherwise OFF. */
160 #ifdef SYMBOL_RELOADING_DEFAULT
161 int symbol_reloading
= SYMBOL_RELOADING_DEFAULT
;
163 int symbol_reloading
= 0;
166 show_symbol_reloading (struct ui_file
*file
, int from_tty
,
167 struct cmd_list_element
*c
, const char *value
)
169 fprintf_filtered (file
, _("\
170 Dynamic symbol table reloading multiple times in one run is %s.\n"),
175 /* If non-zero, shared library symbols will be added automatically
176 when the inferior is created, new libraries are loaded, or when
177 attaching to the inferior. This is almost always what users will
178 want to have happen; but for very large programs, the startup time
179 will be excessive, and so if this is a problem, the user can clear
180 this flag and then add the shared library symbols as needed. Note
181 that there is a potential for confusion, since if the shared
182 library symbols are not loaded, commands like "info fun" will *not*
183 report all the functions that are actually present. */
185 int auto_solib_add
= 1;
187 /* For systems that support it, a threshold size in megabytes. If
188 automatically adding a new library's symbol table to those already
189 known to the debugger would cause the total shared library symbol
190 size to exceed this threshhold, then the shlib's symbols are not
191 added. The threshold is ignored if the user explicitly asks for a
192 shlib to be added, such as when using the "sharedlibrary"
195 int auto_solib_limit
;
198 /* This compares two partial symbols by names, using strcmp_iw_ordered
199 for the comparison. */
202 compare_psymbols (const void *s1p
, const void *s2p
)
204 struct partial_symbol
*const *s1
= s1p
;
205 struct partial_symbol
*const *s2
= s2p
;
207 return strcmp_iw_ordered (SYMBOL_SEARCH_NAME (*s1
),
208 SYMBOL_SEARCH_NAME (*s2
));
212 sort_pst_symbols (struct partial_symtab
*pst
)
214 /* Sort the global list; don't sort the static list */
216 qsort (pst
->objfile
->global_psymbols
.list
+ pst
->globals_offset
,
217 pst
->n_global_syms
, sizeof (struct partial_symbol
*),
221 /* Make a null terminated copy of the string at PTR with SIZE characters in
222 the obstack pointed to by OBSTACKP . Returns the address of the copy.
223 Note that the string at PTR does not have to be null terminated, I.E. it
224 may be part of a larger string and we are only saving a substring. */
227 obsavestring (const char *ptr
, int size
, struct obstack
*obstackp
)
229 char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
230 /* Open-coded memcpy--saves function call time. These strings are usually
231 short. FIXME: Is this really still true with a compiler that can
234 const char *p1
= ptr
;
236 const char *end
= ptr
+ size
;
244 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
245 in the obstack pointed to by OBSTACKP. */
248 obconcat (struct obstack
*obstackp
, const char *s1
, const char *s2
,
251 int len
= strlen (s1
) + strlen (s2
) + strlen (s3
) + 1;
252 char *val
= (char *) obstack_alloc (obstackp
, len
);
259 /* True if we are nested inside psymtab_to_symtab. */
261 int currently_reading_symtab
= 0;
264 decrement_reading_symtab (void *dummy
)
266 currently_reading_symtab
--;
269 /* Get the symbol table that corresponds to a partial_symtab.
270 This is fast after the first time you do it. In fact, there
271 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
275 psymtab_to_symtab (struct partial_symtab
*pst
)
277 /* If it's been looked up before, return it. */
281 /* If it has not yet been read in, read it. */
284 struct cleanup
*back_to
= make_cleanup (decrement_reading_symtab
, NULL
);
285 currently_reading_symtab
++;
286 (*pst
->read_symtab
) (pst
);
287 do_cleanups (back_to
);
293 /* Remember the lowest-addressed loadable section we've seen.
294 This function is called via bfd_map_over_sections.
296 In case of equal vmas, the section with the largest size becomes the
297 lowest-addressed loadable section.
299 If the vmas and sizes are equal, the last section is considered the
300 lowest-addressed loadable section. */
303 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
305 asection
**lowest
= (asection
**) obj
;
307 if (0 == (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
))
310 *lowest
= sect
; /* First loadable section */
311 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
312 *lowest
= sect
; /* A lower loadable section */
313 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
314 && (bfd_section_size (abfd
, (*lowest
))
315 <= bfd_section_size (abfd
, sect
)))
319 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
321 struct section_addr_info
*
322 alloc_section_addr_info (size_t num_sections
)
324 struct section_addr_info
*sap
;
327 size
= (sizeof (struct section_addr_info
)
328 + sizeof (struct other_sections
) * (num_sections
- 1));
329 sap
= (struct section_addr_info
*) xmalloc (size
);
330 memset (sap
, 0, size
);
331 sap
->num_sections
= num_sections
;
337 /* Return a freshly allocated copy of ADDRS. The section names, if
338 any, are also freshly allocated copies of those in ADDRS. */
339 struct section_addr_info
*
340 copy_section_addr_info (struct section_addr_info
*addrs
)
342 struct section_addr_info
*copy
343 = alloc_section_addr_info (addrs
->num_sections
);
346 copy
->num_sections
= addrs
->num_sections
;
347 for (i
= 0; i
< addrs
->num_sections
; i
++)
349 copy
->other
[i
].addr
= addrs
->other
[i
].addr
;
350 if (addrs
->other
[i
].name
)
351 copy
->other
[i
].name
= xstrdup (addrs
->other
[i
].name
);
353 copy
->other
[i
].name
= NULL
;
354 copy
->other
[i
].sectindex
= addrs
->other
[i
].sectindex
;
362 /* Build (allocate and populate) a section_addr_info struct from
363 an existing section table. */
365 extern struct section_addr_info
*
366 build_section_addr_info_from_section_table (const struct section_table
*start
,
367 const struct section_table
*end
)
369 struct section_addr_info
*sap
;
370 const struct section_table
*stp
;
373 sap
= alloc_section_addr_info (end
- start
);
375 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
377 if (bfd_get_section_flags (stp
->bfd
,
378 stp
->the_bfd_section
) & (SEC_ALLOC
| SEC_LOAD
)
379 && oidx
< end
- start
)
381 sap
->other
[oidx
].addr
= stp
->addr
;
382 sap
->other
[oidx
].name
383 = xstrdup (bfd_section_name (stp
->bfd
, stp
->the_bfd_section
));
384 sap
->other
[oidx
].sectindex
= stp
->the_bfd_section
->index
;
393 /* Free all memory allocated by build_section_addr_info_from_section_table. */
396 free_section_addr_info (struct section_addr_info
*sap
)
400 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
401 if (sap
->other
[idx
].name
)
402 xfree (sap
->other
[idx
].name
);
407 /* Initialize OBJFILE's sect_index_* members. */
409 init_objfile_sect_indices (struct objfile
*objfile
)
414 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
416 objfile
->sect_index_text
= sect
->index
;
418 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
420 objfile
->sect_index_data
= sect
->index
;
422 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
424 objfile
->sect_index_bss
= sect
->index
;
426 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
428 objfile
->sect_index_rodata
= sect
->index
;
430 /* This is where things get really weird... We MUST have valid
431 indices for the various sect_index_* members or gdb will abort.
432 So if for example, there is no ".text" section, we have to
433 accomodate that. First, check for a file with the standard
434 one or two segments. */
436 symfile_find_segment_sections (objfile
);
438 /* Except when explicitly adding symbol files at some address,
439 section_offsets contains nothing but zeros, so it doesn't matter
440 which slot in section_offsets the individual sect_index_* members
441 index into. So if they are all zero, it is safe to just point
442 all the currently uninitialized indices to the first slot. But
443 beware: if this is the main executable, it may be relocated
444 later, e.g. by the remote qOffsets packet, and then this will
445 be wrong! That's why we try segments first. */
447 for (i
= 0; i
< objfile
->num_sections
; i
++)
449 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
454 if (i
== objfile
->num_sections
)
456 if (objfile
->sect_index_text
== -1)
457 objfile
->sect_index_text
= 0;
458 if (objfile
->sect_index_data
== -1)
459 objfile
->sect_index_data
= 0;
460 if (objfile
->sect_index_bss
== -1)
461 objfile
->sect_index_bss
= 0;
462 if (objfile
->sect_index_rodata
== -1)
463 objfile
->sect_index_rodata
= 0;
467 /* The arguments to place_section. */
469 struct place_section_arg
471 struct section_offsets
*offsets
;
475 /* Find a unique offset to use for loadable section SECT if
476 the user did not provide an offset. */
479 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
481 struct place_section_arg
*arg
= obj
;
482 CORE_ADDR
*offsets
= arg
->offsets
->offsets
, start_addr
;
484 ULONGEST align
= ((ULONGEST
) 1) << bfd_get_section_alignment (abfd
, sect
);
486 /* We are only interested in allocated sections. */
487 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
490 /* If the user specified an offset, honor it. */
491 if (offsets
[sect
->index
] != 0)
494 /* Otherwise, let's try to find a place for the section. */
495 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
502 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
504 int indx
= cur_sec
->index
;
505 CORE_ADDR cur_offset
;
507 /* We don't need to compare against ourself. */
511 /* We can only conflict with allocated sections. */
512 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
515 /* If the section offset is 0, either the section has not been placed
516 yet, or it was the lowest section placed (in which case LOWEST
517 will be past its end). */
518 if (offsets
[indx
] == 0)
521 /* If this section would overlap us, then we must move up. */
522 if (start_addr
+ bfd_get_section_size (sect
) > offsets
[indx
]
523 && start_addr
< offsets
[indx
] + bfd_get_section_size (cur_sec
))
525 start_addr
= offsets
[indx
] + bfd_get_section_size (cur_sec
);
526 start_addr
= (start_addr
+ align
- 1) & -align
;
531 /* Otherwise, we appear to be OK. So far. */
536 offsets
[sect
->index
] = start_addr
;
537 arg
->lowest
= start_addr
+ bfd_get_section_size (sect
);
539 exec_set_section_address (bfd_get_filename (abfd
), sect
->index
, start_addr
);
542 /* Parse the user's idea of an offset for dynamic linking, into our idea
543 of how to represent it for fast symbol reading. This is the default
544 version of the sym_fns.sym_offsets function for symbol readers that
545 don't need to do anything special. It allocates a section_offsets table
546 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
549 default_symfile_offsets (struct objfile
*objfile
,
550 struct section_addr_info
*addrs
)
554 objfile
->num_sections
= bfd_count_sections (objfile
->obfd
);
555 objfile
->section_offsets
= (struct section_offsets
*)
556 obstack_alloc (&objfile
->objfile_obstack
,
557 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
558 memset (objfile
->section_offsets
, 0,
559 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
561 /* Now calculate offsets for section that were specified by the
563 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
565 struct other_sections
*osp
;
567 osp
= &addrs
->other
[i
] ;
571 /* Record all sections in offsets */
572 /* The section_offsets in the objfile are here filled in using
574 (objfile
->section_offsets
)->offsets
[osp
->sectindex
] = osp
->addr
;
577 /* For relocatable files, all loadable sections will start at zero.
578 The zero is meaningless, so try to pick arbitrary addresses such
579 that no loadable sections overlap. This algorithm is quadratic,
580 but the number of sections in a single object file is generally
582 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
584 struct place_section_arg arg
;
585 bfd
*abfd
= objfile
->obfd
;
587 CORE_ADDR lowest
= 0;
589 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
590 /* We do not expect this to happen; just skip this step if the
591 relocatable file has a section with an assigned VMA. */
592 if (bfd_section_vma (abfd
, cur_sec
) != 0)
597 CORE_ADDR
*offsets
= objfile
->section_offsets
->offsets
;
599 /* Pick non-overlapping offsets for sections the user did not
601 arg
.offsets
= objfile
->section_offsets
;
603 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
605 /* Correctly filling in the section offsets is not quite
606 enough. Relocatable files have two properties that
607 (most) shared objects do not:
609 - Their debug information will contain relocations. Some
610 shared libraries do also, but many do not, so this can not
613 - If there are multiple code sections they will be loaded
614 at different relative addresses in memory than they are
615 in the objfile, since all sections in the file will start
618 Because GDB has very limited ability to map from an
619 address in debug info to the correct code section,
620 it relies on adding SECT_OFF_TEXT to things which might be
621 code. If we clear all the section offsets, and set the
622 section VMAs instead, then symfile_relocate_debug_section
623 will return meaningful debug information pointing at the
626 GDB has too many different data structures for section
627 addresses - a bfd, objfile, and so_list all have section
628 tables, as does exec_ops. Some of these could probably
631 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
632 cur_sec
= cur_sec
->next
)
634 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
637 bfd_set_section_vma (abfd
, cur_sec
, offsets
[cur_sec
->index
]);
638 offsets
[cur_sec
->index
] = 0;
643 /* Remember the bfd indexes for the .text, .data, .bss and
645 init_objfile_sect_indices (objfile
);
649 /* Divide the file into segments, which are individual relocatable units.
650 This is the default version of the sym_fns.sym_segments function for
651 symbol readers that do not have an explicit representation of segments.
652 It assumes that object files do not have segments, and fully linked
653 files have a single segment. */
655 struct symfile_segment_data
*
656 default_symfile_segments (bfd
*abfd
)
660 struct symfile_segment_data
*data
;
663 /* Relocatable files contain enough information to position each
664 loadable section independently; they should not be relocated
666 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
669 /* Make sure there is at least one loadable section in the file. */
670 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
672 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
680 low
= bfd_get_section_vma (abfd
, sect
);
681 high
= low
+ bfd_get_section_size (sect
);
683 data
= XZALLOC (struct symfile_segment_data
);
684 data
->num_segments
= 1;
685 data
->segment_bases
= XCALLOC (1, CORE_ADDR
);
686 data
->segment_sizes
= XCALLOC (1, CORE_ADDR
);
688 num_sections
= bfd_count_sections (abfd
);
689 data
->segment_info
= XCALLOC (num_sections
, int);
691 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
695 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
698 vma
= bfd_get_section_vma (abfd
, sect
);
701 if (vma
+ bfd_get_section_size (sect
) > high
)
702 high
= vma
+ bfd_get_section_size (sect
);
704 data
->segment_info
[i
] = 1;
707 data
->segment_bases
[0] = low
;
708 data
->segment_sizes
[0] = high
- low
;
713 /* Process a symbol file, as either the main file or as a dynamically
716 OBJFILE is where the symbols are to be read from.
718 ADDRS is the list of section load addresses. If the user has given
719 an 'add-symbol-file' command, then this is the list of offsets and
720 addresses he or she provided as arguments to the command; or, if
721 we're handling a shared library, these are the actual addresses the
722 sections are loaded at, according to the inferior's dynamic linker
723 (as gleaned by GDB's shared library code). We convert each address
724 into an offset from the section VMA's as it appears in the object
725 file, and then call the file's sym_offsets function to convert this
726 into a format-specific offset table --- a `struct section_offsets'.
727 If ADDRS is non-zero, OFFSETS must be zero.
729 OFFSETS is a table of section offsets already in the right
730 format-specific representation. NUM_OFFSETS is the number of
731 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
732 assume this is the proper table the call to sym_offsets described
733 above would produce. Instead of calling sym_offsets, we just dump
734 it right into objfile->section_offsets. (When we're re-reading
735 symbols from an objfile, we don't have the original load address
736 list any more; all we have is the section offset table.) If
737 OFFSETS is non-zero, ADDRS must be zero.
739 MAINLINE is nonzero if this is the main symbol file, or zero if
740 it's an extra symbol file such as dynamically loaded code.
742 VERBO is nonzero if the caller has printed a verbose message about
743 the symbol reading (and complaints can be more terse about it). */
746 syms_from_objfile (struct objfile
*objfile
,
747 struct section_addr_info
*addrs
,
748 struct section_offsets
*offsets
,
753 struct section_addr_info
*local_addr
= NULL
;
754 struct cleanup
*old_chain
;
756 gdb_assert (! (addrs
&& offsets
));
758 init_entry_point_info (objfile
);
759 objfile
->sf
= find_sym_fns (objfile
->obfd
);
761 if (objfile
->sf
== NULL
)
762 return; /* No symbols. */
764 /* Make sure that partially constructed symbol tables will be cleaned up
765 if an error occurs during symbol reading. */
766 old_chain
= make_cleanup_free_objfile (objfile
);
768 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
769 list. We now establish the convention that an addr of zero means
770 no load address was specified. */
771 if (! addrs
&& ! offsets
)
774 = alloc_section_addr_info (bfd_count_sections (objfile
->obfd
));
775 make_cleanup (xfree
, local_addr
);
779 /* Now either addrs or offsets is non-zero. */
783 /* We will modify the main symbol table, make sure that all its users
784 will be cleaned up if an error occurs during symbol reading. */
785 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
787 /* Since no error yet, throw away the old symbol table. */
789 if (symfile_objfile
!= NULL
)
791 free_objfile (symfile_objfile
);
792 symfile_objfile
= NULL
;
795 /* Currently we keep symbols from the add-symbol-file command.
796 If the user wants to get rid of them, they should do "symbol-file"
797 without arguments first. Not sure this is the best behavior
800 (*objfile
->sf
->sym_new_init
) (objfile
);
803 /* Convert addr into an offset rather than an absolute address.
804 We find the lowest address of a loaded segment in the objfile,
805 and assume that <addr> is where that got loaded.
807 We no longer warn if the lowest section is not a text segment (as
808 happens for the PA64 port. */
809 if (!mainline
&& addrs
&& addrs
->other
[0].name
)
811 asection
*lower_sect
;
813 CORE_ADDR lower_offset
;
816 /* Find lowest loadable section to be used as starting point for
817 continguous sections. FIXME!! won't work without call to find
818 .text first, but this assumes text is lowest section. */
819 lower_sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
820 if (lower_sect
== NULL
)
821 bfd_map_over_sections (objfile
->obfd
, find_lowest_section
,
823 if (lower_sect
== NULL
)
824 warning (_("no loadable sections found in added symbol-file %s"),
827 if ((bfd_get_section_flags (objfile
->obfd
, lower_sect
) & SEC_CODE
) == 0)
828 warning (_("Lowest section in %s is %s at %s"),
830 bfd_section_name (objfile
->obfd
, lower_sect
),
831 paddr (bfd_section_vma (objfile
->obfd
, lower_sect
)));
832 if (lower_sect
!= NULL
)
833 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 #ifndef DEPRECATED_IBM6000_TARGET
898 /* This is a SVR4/SunOS specific hack, I think. In any event, it
899 screws RS/6000. sym_offsets should be doing this sort of thing,
900 because it knows the mapping between bfd sections and
902 /* This is a hack. As far as I can tell, section offsets are not
903 target dependent. They are all set to addr with a couple of
904 exceptions. The exceptions are sysvr4 shared libraries, whose
905 offsets are kept in solib structures anyway and rs6000 xcoff
906 which handles shared libraries in a completely unique way.
908 Section offsets are built similarly, except that they are built
909 by adding addr in all cases because there is no clear mapping
910 from section_offsets into actual sections. Note that solib.c
911 has a different algorithm for finding section offsets.
913 These should probably all be collapsed into some target
914 independent form of shared library support. FIXME. */
918 struct obj_section
*s
;
920 /* Map section offsets in "addr" back to the object's
921 sections by comparing the section names with bfd's
922 section names. Then adjust the section address by
923 the offset. */ /* for gdb/13815 */
925 ALL_OBJFILE_OSECTIONS (objfile
, s
)
927 CORE_ADDR s_addr
= 0;
931 !s_addr
&& i
< addrs
->num_sections
&& addrs
->other
[i
].name
;
933 if (strcmp (bfd_section_name (s
->objfile
->obfd
,
935 addrs
->other
[i
].name
) == 0)
936 s_addr
= addrs
->other
[i
].addr
; /* end added for gdb/13815 */
938 s
->addr
-= s
->offset
;
940 s
->endaddr
-= s
->offset
;
941 s
->endaddr
+= s_addr
;
945 #endif /* not DEPRECATED_IBM6000_TARGET */
947 (*objfile
->sf
->sym_read
) (objfile
, mainline
);
949 /* Don't allow char * to have a typename (else would get caddr_t).
950 Ditto void *. FIXME: Check whether this is now done by all the
951 symbol readers themselves (many of them now do), and if so remove
954 TYPE_NAME (lookup_pointer_type (builtin_type_char
)) = 0;
955 TYPE_NAME (lookup_pointer_type (builtin_type_void
)) = 0;
957 /* Mark the objfile has having had initial symbol read attempted. Note
958 that this does not mean we found any symbols... */
960 objfile
->flags
|= OBJF_SYMS
;
962 /* Discard cleanups as symbol reading was successful. */
964 discard_cleanups (old_chain
);
967 /* Perform required actions after either reading in the initial
968 symbols for a new objfile, or mapping in the symbols from a reusable
972 new_symfile_objfile (struct objfile
*objfile
, int mainline
, int verbo
)
975 /* If this is the main symbol file we have to clean up all users of the
976 old main symbol file. Otherwise it is sufficient to fixup all the
977 breakpoints that may have been redefined by this symbol file. */
980 /* OK, make it the "real" symbol file. */
981 symfile_objfile
= objfile
;
983 clear_symtab_users ();
987 breakpoint_re_set ();
990 /* We're done reading the symbol file; finish off complaints. */
991 clear_complaints (&symfile_complaints
, 0, verbo
);
994 /* Process a symbol file, as either the main file or as a dynamically
997 ABFD is a BFD already open on the file, as from symfile_bfd_open.
998 This BFD will be closed on error, and is always consumed by this function.
1000 FROM_TTY says how verbose to be.
1002 MAINLINE specifies whether this is the main symbol file, or whether
1003 it's an extra symbol file such as dynamically loaded code.
1005 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
1006 syms_from_objfile, above. ADDRS is ignored when MAINLINE is
1009 Upon success, returns a pointer to the objfile that was added.
1010 Upon failure, jumps back to command level (never returns). */
1011 static struct objfile
*
1012 symbol_file_add_with_addrs_or_offsets (bfd
*abfd
, int from_tty
,
1013 struct section_addr_info
*addrs
,
1014 struct section_offsets
*offsets
,
1016 int mainline
, int flags
)
1018 struct objfile
*objfile
;
1019 struct partial_symtab
*psymtab
;
1020 char *debugfile
= NULL
;
1021 struct section_addr_info
*orig_addrs
= NULL
;
1022 struct cleanup
*my_cleanups
;
1023 const char *name
= bfd_get_filename (abfd
);
1025 my_cleanups
= make_cleanup_bfd_close (abfd
);
1027 /* Give user a chance to burp if we'd be
1028 interactively wiping out any existing symbols. */
1030 if ((have_full_symbols () || have_partial_symbols ())
1033 && !query ("Load new symbol table from \"%s\"? ", name
))
1034 error (_("Not confirmed."));
1036 objfile
= allocate_objfile (abfd
, flags
);
1037 discard_cleanups (my_cleanups
);
1041 orig_addrs
= copy_section_addr_info (addrs
);
1042 make_cleanup_free_section_addr_info (orig_addrs
);
1045 /* We either created a new mapped symbol table, mapped an existing
1046 symbol table file which has not had initial symbol reading
1047 performed, or need to read an unmapped symbol table. */
1048 if (from_tty
|| info_verbose
)
1050 if (deprecated_pre_add_symbol_hook
)
1051 deprecated_pre_add_symbol_hook (name
);
1054 printf_unfiltered (_("Reading symbols from %s..."), name
);
1056 gdb_flush (gdb_stdout
);
1059 syms_from_objfile (objfile
, addrs
, offsets
, num_offsets
,
1060 mainline
, from_tty
);
1062 /* We now have at least a partial symbol table. Check to see if the
1063 user requested that all symbols be read on initial access via either
1064 the gdb startup command line or on a per symbol file basis. Expand
1065 all partial symbol tables for this objfile if so. */
1067 if ((flags
& OBJF_READNOW
) || readnow_symbol_files
)
1069 if (from_tty
|| info_verbose
)
1071 printf_unfiltered (_("expanding to full symbols..."));
1073 gdb_flush (gdb_stdout
);
1076 for (psymtab
= objfile
->psymtabs
;
1078 psymtab
= psymtab
->next
)
1080 psymtab_to_symtab (psymtab
);
1084 /* If the file has its own symbol tables it has no separate debug info.
1085 `.dynsym'/`.symtab' go to MSYMBOLS, `.debug_info' goes to SYMTABS/PSYMTABS.
1086 `.gnu_debuglink' may no longer be present with `.note.gnu.build-id'. */
1087 if (objfile
->psymtabs
== NULL
)
1088 debugfile
= find_separate_debug_file (objfile
);
1093 objfile
->separate_debug_objfile
1094 = symbol_file_add (debugfile
, from_tty
, orig_addrs
, 0, flags
);
1098 objfile
->separate_debug_objfile
1099 = symbol_file_add (debugfile
, from_tty
, NULL
, 0, flags
);
1101 objfile
->separate_debug_objfile
->separate_debug_objfile_backlink
1104 /* Put the separate debug object before the normal one, this is so that
1105 usage of the ALL_OBJFILES_SAFE macro will stay safe. */
1106 put_objfile_before (objfile
->separate_debug_objfile
, objfile
);
1111 if (!have_partial_symbols () && !have_full_symbols ())
1114 printf_filtered (_("(no debugging symbols found)"));
1115 if (from_tty
|| info_verbose
)
1116 printf_filtered ("...");
1118 printf_filtered ("\n");
1122 if (from_tty
|| info_verbose
)
1124 if (deprecated_post_add_symbol_hook
)
1125 deprecated_post_add_symbol_hook ();
1128 printf_unfiltered (_("done.\n"));
1132 /* We print some messages regardless of whether 'from_tty ||
1133 info_verbose' is true, so make sure they go out at the right
1135 gdb_flush (gdb_stdout
);
1137 do_cleanups (my_cleanups
);
1139 if (objfile
->sf
== NULL
)
1140 return objfile
; /* No symbols. */
1142 new_symfile_objfile (objfile
, mainline
, from_tty
);
1144 observer_notify_new_objfile (objfile
);
1146 bfd_cache_close_all ();
1151 /* Process the symbol file ABFD, as either the main file or as a
1152 dynamically loaded file.
1154 See symbol_file_add_with_addrs_or_offsets's comments for
1157 symbol_file_add_from_bfd (bfd
*abfd
, int from_tty
,
1158 struct section_addr_info
*addrs
,
1159 int mainline
, int flags
)
1161 return symbol_file_add_with_addrs_or_offsets (abfd
,
1162 from_tty
, addrs
, 0, 0,
1167 /* Process a symbol file, as either the main file or as a dynamically
1168 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
1171 symbol_file_add (char *name
, int from_tty
, struct section_addr_info
*addrs
,
1172 int mainline
, int flags
)
1174 return symbol_file_add_from_bfd (symfile_bfd_open (name
), from_tty
,
1175 addrs
, mainline
, flags
);
1179 /* Call symbol_file_add() with default values and update whatever is
1180 affected by the loading of a new main().
1181 Used when the file is supplied in the gdb command line
1182 and by some targets with special loading requirements.
1183 The auxiliary function, symbol_file_add_main_1(), has the flags
1184 argument for the switches that can only be specified in the symbol_file
1188 symbol_file_add_main (char *args
, int from_tty
)
1190 symbol_file_add_main_1 (args
, from_tty
, 0);
1194 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
1196 symbol_file_add (args
, from_tty
, NULL
, 1, flags
);
1198 /* Getting new symbols may change our opinion about
1199 what is frameless. */
1200 reinit_frame_cache ();
1202 set_initial_language ();
1206 symbol_file_clear (int from_tty
)
1208 if ((have_full_symbols () || have_partial_symbols ())
1211 ? !query (_("Discard symbol table from `%s'? "),
1212 symfile_objfile
->name
)
1213 : !query (_("Discard symbol table? "))))
1214 error (_("Not confirmed."));
1215 free_all_objfiles ();
1217 /* solib descriptors may have handles to objfiles. Since their
1218 storage has just been released, we'd better wipe the solib
1219 descriptors as well.
1221 no_shared_libraries (NULL
, from_tty
);
1223 symfile_objfile
= NULL
;
1225 printf_unfiltered (_("No symbol file now.\n"));
1234 /* Locate NT_GNU_BUILD_ID from ABFD and return its content. */
1236 static struct build_id
*
1237 build_id_bfd_get (bfd
*abfd
)
1239 struct build_id
*retval
;
1241 if (!bfd_check_format (abfd
, bfd_object
)
1242 || bfd_get_flavour (abfd
) != bfd_target_elf_flavour
1243 || elf_tdata (abfd
)->build_id
== NULL
)
1246 retval
= xmalloc (sizeof *retval
- 1 + elf_tdata (abfd
)->build_id_size
);
1247 retval
->size
= elf_tdata (abfd
)->build_id_size
;
1248 memcpy (retval
->data
, elf_tdata (abfd
)->build_id
, retval
->size
);
1253 /* Return if FILENAME has NT_GNU_BUILD_ID matching the CHECK value. */
1256 build_id_verify (const char *filename
, struct build_id
*check
)
1259 struct build_id
*found
= NULL
;
1262 /* We expect to be silent on the non-existing files. */
1263 abfd
= bfd_openr (filename
, gnutarget
);
1267 found
= build_id_bfd_get (abfd
);
1270 warning (_("File \"%s\" has no build-id, file skipped"), filename
);
1271 else if (found
->size
!= check
->size
1272 || memcmp (found
->data
, check
->data
, found
->size
) != 0)
1273 warning (_("File \"%s\" has a different build-id, file skipped"), filename
);
1277 if (!bfd_close (abfd
))
1278 warning (_("cannot close \"%s\": %s"), filename
,
1279 bfd_errmsg (bfd_get_error ()));
1284 build_id_to_debug_filename (struct build_id
*build_id
)
1286 char *link
, *s
, *retval
= NULL
;
1287 gdb_byte
*data
= build_id
->data
;
1288 size_t size
= build_id
->size
;
1290 /* DEBUG_FILE_DIRECTORY/.build-id/ab/cdef */
1291 link
= xmalloc (strlen (debug_file_directory
) + (sizeof "/.build-id/" - 1) + 1
1292 + 2 * size
+ (sizeof ".debug" - 1) + 1);
1293 s
= link
+ sprintf (link
, "%s/.build-id/", debug_file_directory
);
1297 s
+= sprintf (s
, "%02x", (unsigned) *data
++);
1302 s
+= sprintf (s
, "%02x", (unsigned) *data
++);
1303 strcpy (s
, ".debug");
1305 /* lrealpath() is expensive even for the usually non-existent files. */
1306 if (access (link
, F_OK
) == 0)
1307 retval
= lrealpath (link
);
1310 if (retval
!= NULL
&& !build_id_verify (retval
, build_id
))
1320 get_debug_link_info (struct objfile
*objfile
, unsigned long *crc32_out
)
1323 bfd_size_type debuglink_size
;
1324 unsigned long crc32
;
1329 sect
= bfd_get_section_by_name (objfile
->obfd
, ".gnu_debuglink");
1334 debuglink_size
= bfd_section_size (objfile
->obfd
, sect
);
1336 contents
= xmalloc (debuglink_size
);
1337 bfd_get_section_contents (objfile
->obfd
, sect
, contents
,
1338 (file_ptr
)0, (bfd_size_type
)debuglink_size
);
1340 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1341 crc_offset
= strlen (contents
) + 1;
1342 crc_offset
= (crc_offset
+ 3) & ~3;
1344 crc32
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) (contents
+ crc_offset
));
1351 separate_debug_file_exists (const char *name
, unsigned long crc
)
1353 unsigned long file_crc
= 0;
1355 gdb_byte buffer
[8*1024];
1358 fd
= open (name
, O_RDONLY
| O_BINARY
);
1362 while ((count
= read (fd
, buffer
, sizeof (buffer
))) > 0)
1363 file_crc
= gnu_debuglink_crc32 (file_crc
, buffer
, count
);
1367 return crc
== file_crc
;
1370 char *debug_file_directory
= NULL
;
1372 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1373 struct cmd_list_element
*c
, const char *value
)
1375 fprintf_filtered (file
, _("\
1376 The directory where separate debug symbols are searched for is \"%s\".\n"),
1380 #if ! defined (DEBUG_SUBDIRECTORY)
1381 #define DEBUG_SUBDIRECTORY ".debug"
1385 find_separate_debug_file (struct objfile
*objfile
)
1393 bfd_size_type debuglink_size
;
1394 unsigned long crc32
;
1396 struct build_id
*build_id
;
1398 build_id
= build_id_bfd_get (objfile
->obfd
);
1399 if (build_id
!= NULL
)
1401 char *build_id_name
;
1403 build_id_name
= build_id_to_debug_filename (build_id
);
1405 /* Prevent looping on a stripped .debug file. */
1406 if (build_id_name
!= NULL
&& strcmp (build_id_name
, objfile
->name
) == 0)
1408 warning (_("\"%s\": separate debug info file has no debug info"),
1410 xfree (build_id_name
);
1412 else if (build_id_name
!= NULL
)
1413 return build_id_name
;
1416 basename
= get_debug_link_info (objfile
, &crc32
);
1418 if (basename
== NULL
)
1421 dir
= xstrdup (objfile
->name
);
1423 /* Strip off the final filename part, leaving the directory name,
1424 followed by a slash. Objfile names should always be absolute and
1425 tilde-expanded, so there should always be a slash in there
1427 for (i
= strlen(dir
) - 1; i
>= 0; i
--)
1429 if (IS_DIR_SEPARATOR (dir
[i
]))
1432 gdb_assert (i
>= 0 && IS_DIR_SEPARATOR (dir
[i
]));
1435 debugfile
= alloca (strlen (debug_file_directory
) + 1
1437 + strlen (DEBUG_SUBDIRECTORY
)
1442 /* First try in the same directory as the original file. */
1443 strcpy (debugfile
, dir
);
1444 strcat (debugfile
, basename
);
1446 if (separate_debug_file_exists (debugfile
, crc32
))
1450 return xstrdup (debugfile
);
1453 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1454 strcpy (debugfile
, dir
);
1455 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1456 strcat (debugfile
, "/");
1457 strcat (debugfile
, basename
);
1459 if (separate_debug_file_exists (debugfile
, crc32
))
1463 return xstrdup (debugfile
);
1466 /* Then try in the global debugfile directory. */
1467 strcpy (debugfile
, debug_file_directory
);
1468 strcat (debugfile
, "/");
1469 strcat (debugfile
, dir
);
1470 strcat (debugfile
, basename
);
1472 if (separate_debug_file_exists (debugfile
, crc32
))
1476 return xstrdup (debugfile
);
1479 /* If the file is in the sysroot, try using its base path in the
1480 global debugfile directory. */
1481 canon_name
= lrealpath (dir
);
1483 && strncmp (canon_name
, gdb_sysroot
, strlen (gdb_sysroot
)) == 0
1484 && IS_DIR_SEPARATOR (canon_name
[strlen (gdb_sysroot
)]))
1486 strcpy (debugfile
, debug_file_directory
);
1487 strcat (debugfile
, canon_name
+ strlen (gdb_sysroot
));
1488 strcat (debugfile
, "/");
1489 strcat (debugfile
, basename
);
1491 if (separate_debug_file_exists (debugfile
, crc32
))
1496 return xstrdup (debugfile
);
1509 /* This is the symbol-file command. Read the file, analyze its
1510 symbols, and add a struct symtab to a symtab list. The syntax of
1511 the command is rather bizarre:
1513 1. The function buildargv implements various quoting conventions
1514 which are undocumented and have little or nothing in common with
1515 the way things are quoted (or not quoted) elsewhere in GDB.
1517 2. Options are used, which are not generally used in GDB (perhaps
1518 "set mapped on", "set readnow on" would be better)
1520 3. The order of options matters, which is contrary to GNU
1521 conventions (because it is confusing and inconvenient). */
1524 symbol_file_command (char *args
, int from_tty
)
1530 symbol_file_clear (from_tty
);
1534 char **argv
= buildargv (args
);
1535 int flags
= OBJF_USERLOADED
;
1536 struct cleanup
*cleanups
;
1542 cleanups
= make_cleanup_freeargv (argv
);
1543 while (*argv
!= NULL
)
1545 if (strcmp (*argv
, "-readnow") == 0)
1546 flags
|= OBJF_READNOW
;
1547 else if (**argv
== '-')
1548 error (_("unknown option `%s'"), *argv
);
1551 symbol_file_add_main_1 (*argv
, from_tty
, flags
);
1559 error (_("no symbol file name was specified"));
1561 do_cleanups (cleanups
);
1565 /* Set the initial language.
1567 FIXME: A better solution would be to record the language in the
1568 psymtab when reading partial symbols, and then use it (if known) to
1569 set the language. This would be a win for formats that encode the
1570 language in an easily discoverable place, such as DWARF. For
1571 stabs, we can jump through hoops looking for specially named
1572 symbols or try to intuit the language from the specific type of
1573 stabs we find, but we can't do that until later when we read in
1577 set_initial_language (void)
1579 struct partial_symtab
*pst
;
1580 enum language lang
= language_unknown
;
1582 pst
= find_main_psymtab ();
1585 if (pst
->filename
!= NULL
)
1586 lang
= deduce_language_from_filename (pst
->filename
);
1588 if (lang
== language_unknown
)
1590 /* Make C the default language */
1594 set_language (lang
);
1595 expected_language
= current_language
; /* Don't warn the user. */
1599 /* Open the file specified by NAME and hand it off to BFD for
1600 preliminary analysis. Return a newly initialized bfd *, which
1601 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1602 absolute). In case of trouble, error() is called. */
1605 symfile_bfd_open (char *name
)
1609 char *absolute_name
;
1611 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy. */
1613 /* Look down path for it, allocate 2nd new malloc'd copy. */
1614 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, name
,
1615 O_RDONLY
| O_BINARY
, 0, &absolute_name
);
1616 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1619 char *exename
= alloca (strlen (name
) + 5);
1620 strcat (strcpy (exename
, name
), ".exe");
1621 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, exename
,
1622 O_RDONLY
| O_BINARY
, 0, &absolute_name
);
1627 make_cleanup (xfree
, name
);
1628 perror_with_name (name
);
1631 /* Free 1st new malloc'd copy, but keep the 2nd malloc'd copy in
1632 bfd. It'll be freed in free_objfile(). */
1634 name
= absolute_name
;
1636 sym_bfd
= bfd_fopen (name
, gnutarget
, FOPEN_RB
, desc
);
1640 make_cleanup (xfree
, name
);
1641 error (_("\"%s\": can't open to read symbols: %s."), name
,
1642 bfd_errmsg (bfd_get_error ()));
1644 bfd_set_cacheable (sym_bfd
, 1);
1646 if (!bfd_check_format (sym_bfd
, bfd_object
))
1648 /* FIXME: should be checking for errors from bfd_close (for one
1649 thing, on error it does not free all the storage associated
1651 bfd_close (sym_bfd
); /* This also closes desc. */
1652 make_cleanup (xfree
, name
);
1653 error (_("\"%s\": can't read symbols: %s."), name
,
1654 bfd_errmsg (bfd_get_error ()));
1660 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1661 the section was not found. */
1664 get_section_index (struct objfile
*objfile
, char *section_name
)
1666 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1674 /* Link SF into the global symtab_fns list. Called on startup by the
1675 _initialize routine in each object file format reader, to register
1676 information about each format the the reader is prepared to
1680 add_symtab_fns (struct sym_fns
*sf
)
1682 sf
->next
= symtab_fns
;
1686 /* Initialize OBJFILE to read symbols from its associated BFD. It
1687 either returns or calls error(). The result is an initialized
1688 struct sym_fns in the objfile structure, that contains cached
1689 information about the symbol file. */
1691 static struct sym_fns
*
1692 find_sym_fns (bfd
*abfd
)
1695 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1697 if (our_flavour
== bfd_target_srec_flavour
1698 || our_flavour
== bfd_target_ihex_flavour
1699 || our_flavour
== bfd_target_tekhex_flavour
)
1700 return NULL
; /* No symbols. */
1702 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
->next
)
1703 if (our_flavour
== sf
->sym_flavour
)
1706 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1707 bfd_get_target (abfd
));
1711 /* This function runs the load command of our current target. */
1714 load_command (char *arg
, int from_tty
)
1721 parg
= arg
= get_exec_file (1);
1723 /* Count how many \ " ' tab space there are in the name. */
1724 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1732 /* We need to quote this string so buildargv can pull it apart. */
1733 char *temp
= xmalloc (strlen (arg
) + count
+ 1 );
1737 make_cleanup (xfree
, temp
);
1740 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1742 strncpy (ptemp
, prev
, parg
- prev
);
1743 ptemp
+= parg
- prev
;
1747 strcpy (ptemp
, prev
);
1753 /* The user might be reloading because the binary has changed. Take
1754 this opportunity to check. */
1755 reopen_exec_file ();
1758 target_load (arg
, from_tty
);
1760 /* After re-loading the executable, we don't really know which
1761 overlays are mapped any more. */
1762 overlay_cache_invalid
= 1;
1765 /* This version of "load" should be usable for any target. Currently
1766 it is just used for remote targets, not inftarg.c or core files,
1767 on the theory that only in that case is it useful.
1769 Avoiding xmodem and the like seems like a win (a) because we don't have
1770 to worry about finding it, and (b) On VMS, fork() is very slow and so
1771 we don't want to run a subprocess. On the other hand, I'm not sure how
1772 performance compares. */
1774 static int validate_download
= 0;
1776 /* Callback service function for generic_load (bfd_map_over_sections). */
1779 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1781 bfd_size_type
*sum
= data
;
1783 *sum
+= bfd_get_section_size (asec
);
1786 /* Opaque data for load_section_callback. */
1787 struct load_section_data
{
1788 unsigned long load_offset
;
1789 struct load_progress_data
*progress_data
;
1790 VEC(memory_write_request_s
) *requests
;
1793 /* Opaque data for load_progress. */
1794 struct load_progress_data
{
1795 /* Cumulative data. */
1796 unsigned long write_count
;
1797 unsigned long data_count
;
1798 bfd_size_type total_size
;
1801 /* Opaque data for load_progress for a single section. */
1802 struct load_progress_section_data
{
1803 struct load_progress_data
*cumulative
;
1805 /* Per-section data. */
1806 const char *section_name
;
1807 ULONGEST section_sent
;
1808 ULONGEST section_size
;
1813 /* Target write callback routine for progress reporting. */
1816 load_progress (ULONGEST bytes
, void *untyped_arg
)
1818 struct load_progress_section_data
*args
= untyped_arg
;
1819 struct load_progress_data
*totals
;
1822 /* Writing padding data. No easy way to get at the cumulative
1823 stats, so just ignore this. */
1826 totals
= args
->cumulative
;
1828 if (bytes
== 0 && args
->section_sent
== 0)
1830 /* The write is just starting. Let the user know we've started
1832 ui_out_message (uiout
, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1833 args
->section_name
, paddr_nz (args
->section_size
),
1834 paddr_nz (args
->lma
));
1838 if (validate_download
)
1840 /* Broken memories and broken monitors manifest themselves here
1841 when bring new computers to life. This doubles already slow
1843 /* NOTE: cagney/1999-10-18: A more efficient implementation
1844 might add a verify_memory() method to the target vector and
1845 then use that. remote.c could implement that method using
1846 the ``qCRC'' packet. */
1847 gdb_byte
*check
= xmalloc (bytes
);
1848 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
1850 if (target_read_memory (args
->lma
, check
, bytes
) != 0)
1851 error (_("Download verify read failed at 0x%s"),
1853 if (memcmp (args
->buffer
, check
, bytes
) != 0)
1854 error (_("Download verify compare failed at 0x%s"),
1856 do_cleanups (verify_cleanups
);
1858 totals
->data_count
+= bytes
;
1860 args
->buffer
+= bytes
;
1861 totals
->write_count
+= 1;
1862 args
->section_sent
+= bytes
;
1864 || (deprecated_ui_load_progress_hook
!= NULL
1865 && deprecated_ui_load_progress_hook (args
->section_name
,
1866 args
->section_sent
)))
1867 error (_("Canceled the download"));
1869 if (deprecated_show_load_progress
!= NULL
)
1870 deprecated_show_load_progress (args
->section_name
,
1874 totals
->total_size
);
1877 /* Callback service function for generic_load (bfd_map_over_sections). */
1880 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1882 struct memory_write_request
*new_request
;
1883 struct load_section_data
*args
= data
;
1884 struct load_progress_section_data
*section_data
;
1885 bfd_size_type size
= bfd_get_section_size (asec
);
1887 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1889 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
1895 new_request
= VEC_safe_push (memory_write_request_s
,
1896 args
->requests
, NULL
);
1897 memset (new_request
, 0, sizeof (struct memory_write_request
));
1898 section_data
= xcalloc (1, sizeof (struct load_progress_section_data
));
1899 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1900 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size be in instead? */
1901 new_request
->data
= xmalloc (size
);
1902 new_request
->baton
= section_data
;
1904 buffer
= new_request
->data
;
1906 section_data
->cumulative
= args
->progress_data
;
1907 section_data
->section_name
= sect_name
;
1908 section_data
->section_size
= size
;
1909 section_data
->lma
= new_request
->begin
;
1910 section_data
->buffer
= buffer
;
1912 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1915 /* Clean up an entire memory request vector, including load
1916 data and progress records. */
1919 clear_memory_write_data (void *arg
)
1921 VEC(memory_write_request_s
) **vec_p
= arg
;
1922 VEC(memory_write_request_s
) *vec
= *vec_p
;
1924 struct memory_write_request
*mr
;
1926 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
1931 VEC_free (memory_write_request_s
, vec
);
1935 generic_load (char *args
, int from_tty
)
1938 struct timeval start_time
, end_time
;
1940 struct cleanup
*old_cleanups
= make_cleanup (null_cleanup
, 0);
1941 struct load_section_data cbdata
;
1942 struct load_progress_data total_progress
;
1947 memset (&cbdata
, 0, sizeof (cbdata
));
1948 memset (&total_progress
, 0, sizeof (total_progress
));
1949 cbdata
.progress_data
= &total_progress
;
1951 make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
1953 argv
= buildargv (args
);
1958 make_cleanup_freeargv (argv
);
1960 filename
= tilde_expand (argv
[0]);
1961 make_cleanup (xfree
, filename
);
1963 if (argv
[1] != NULL
)
1967 cbdata
.load_offset
= strtoul (argv
[1], &endptr
, 0);
1969 /* If the last word was not a valid number then
1970 treat it as a file name with spaces in. */
1971 if (argv
[1] == endptr
)
1972 error (_("Invalid download offset:%s."), argv
[1]);
1974 if (argv
[2] != NULL
)
1975 error (_("Too many parameters."));
1978 /* Open the file for loading. */
1979 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
1980 if (loadfile_bfd
== NULL
)
1982 perror_with_name (filename
);
1986 /* FIXME: should be checking for errors from bfd_close (for one thing,
1987 on error it does not free all the storage associated with the
1989 make_cleanup_bfd_close (loadfile_bfd
);
1991 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
1993 error (_("\"%s\" is not an object file: %s"), filename
,
1994 bfd_errmsg (bfd_get_error ()));
1997 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
1998 (void *) &total_progress
.total_size
);
2000 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
2002 gettimeofday (&start_time
, NULL
);
2004 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2005 load_progress
) != 0)
2006 error (_("Load failed"));
2008 gettimeofday (&end_time
, NULL
);
2010 entry
= bfd_get_start_address (loadfile_bfd
);
2011 ui_out_text (uiout
, "Start address ");
2012 ui_out_field_fmt (uiout
, "address", "0x%s", paddr_nz (entry
));
2013 ui_out_text (uiout
, ", load size ");
2014 ui_out_field_fmt (uiout
, "load-size", "%lu", total_progress
.data_count
);
2015 ui_out_text (uiout
, "\n");
2016 /* We were doing this in remote-mips.c, I suspect it is right
2017 for other targets too. */
2020 /* FIXME: are we supposed to call symbol_file_add or not? According
2021 to a comment from remote-mips.c (where a call to symbol_file_add
2022 was commented out), making the call confuses GDB if more than one
2023 file is loaded in. Some targets do (e.g., remote-vx.c) but
2024 others don't (or didn't - perhaps they have all been deleted). */
2026 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2027 total_progress
.write_count
,
2028 &start_time
, &end_time
);
2030 do_cleanups (old_cleanups
);
2033 /* Report how fast the transfer went. */
2035 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
2036 replaced by print_transfer_performance (with a very different
2037 function signature). */
2040 report_transfer_performance (unsigned long data_count
, time_t start_time
,
2043 struct timeval start
, end
;
2045 start
.tv_sec
= start_time
;
2047 end
.tv_sec
= end_time
;
2050 print_transfer_performance (gdb_stdout
, data_count
, 0, &start
, &end
);
2054 print_transfer_performance (struct ui_file
*stream
,
2055 unsigned long data_count
,
2056 unsigned long write_count
,
2057 const struct timeval
*start_time
,
2058 const struct timeval
*end_time
)
2060 ULONGEST time_count
;
2062 /* Compute the elapsed time in milliseconds, as a tradeoff between
2063 accuracy and overflow. */
2064 time_count
= (end_time
->tv_sec
- start_time
->tv_sec
) * 1000;
2065 time_count
+= (end_time
->tv_usec
- start_time
->tv_usec
) / 1000;
2067 ui_out_text (uiout
, "Transfer rate: ");
2070 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / time_count
;
2072 if (ui_out_is_mi_like_p (uiout
))
2074 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
* 8);
2075 ui_out_text (uiout
, " bits/sec");
2077 else if (rate
< 1024)
2079 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
);
2080 ui_out_text (uiout
, " bytes/sec");
2084 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
/ 1024);
2085 ui_out_text (uiout
, " KB/sec");
2090 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
2091 ui_out_text (uiout
, " bits in <1 sec");
2093 if (write_count
> 0)
2095 ui_out_text (uiout
, ", ");
2096 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
2097 ui_out_text (uiout
, " bytes/write");
2099 ui_out_text (uiout
, ".\n");
2102 /* This function allows the addition of incrementally linked object files.
2103 It does not modify any state in the target, only in the debugger. */
2104 /* Note: ezannoni 2000-04-13 This function/command used to have a
2105 special case syntax for the rombug target (Rombug is the boot
2106 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2107 rombug case, the user doesn't need to supply a text address,
2108 instead a call to target_link() (in target.c) would supply the
2109 value to use. We are now discontinuing this type of ad hoc syntax. */
2112 add_symbol_file_command (char *args
, int from_tty
)
2114 char *filename
= NULL
;
2115 int flags
= OBJF_USERLOADED
;
2117 int expecting_option
= 0;
2118 int section_index
= 0;
2122 int expecting_sec_name
= 0;
2123 int expecting_sec_addr
= 0;
2132 struct section_addr_info
*section_addrs
;
2133 struct sect_opt
*sect_opts
= NULL
;
2134 size_t num_sect_opts
= 0;
2135 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2138 sect_opts
= (struct sect_opt
*) xmalloc (num_sect_opts
2139 * sizeof (struct sect_opt
));
2144 error (_("add-symbol-file takes a file name and an address"));
2146 argv
= buildargv (args
);
2147 make_cleanup_freeargv (argv
);
2152 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2154 /* Process the argument. */
2157 /* The first argument is the file name. */
2158 filename
= tilde_expand (arg
);
2159 make_cleanup (xfree
, filename
);
2164 /* The second argument is always the text address at which
2165 to load the program. */
2166 sect_opts
[section_index
].name
= ".text";
2167 sect_opts
[section_index
].value
= arg
;
2168 if (++section_index
>= num_sect_opts
)
2171 sect_opts
= ((struct sect_opt
*)
2172 xrealloc (sect_opts
,
2174 * sizeof (struct sect_opt
)));
2179 /* It's an option (starting with '-') or it's an argument
2184 if (strcmp (arg
, "-readnow") == 0)
2185 flags
|= OBJF_READNOW
;
2186 else if (strcmp (arg
, "-s") == 0)
2188 expecting_sec_name
= 1;
2189 expecting_sec_addr
= 1;
2194 if (expecting_sec_name
)
2196 sect_opts
[section_index
].name
= arg
;
2197 expecting_sec_name
= 0;
2200 if (expecting_sec_addr
)
2202 sect_opts
[section_index
].value
= arg
;
2203 expecting_sec_addr
= 0;
2204 if (++section_index
>= num_sect_opts
)
2207 sect_opts
= ((struct sect_opt
*)
2208 xrealloc (sect_opts
,
2210 * sizeof (struct sect_opt
)));
2214 error (_("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*"));
2219 /* This command takes at least two arguments. The first one is a
2220 filename, and the second is the address where this file has been
2221 loaded. Abort now if this address hasn't been provided by the
2223 if (section_index
< 1)
2224 error (_("The address where %s has been loaded is missing"), filename
);
2226 /* Print the prompt for the query below. And save the arguments into
2227 a sect_addr_info structure to be passed around to other
2228 functions. We have to split this up into separate print
2229 statements because hex_string returns a local static
2232 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename
);
2233 section_addrs
= alloc_section_addr_info (section_index
);
2234 make_cleanup (xfree
, section_addrs
);
2235 for (i
= 0; i
< section_index
; i
++)
2238 char *val
= sect_opts
[i
].value
;
2239 char *sec
= sect_opts
[i
].name
;
2241 addr
= parse_and_eval_address (val
);
2243 /* Here we store the section offsets in the order they were
2244 entered on the command line. */
2245 section_addrs
->other
[sec_num
].name
= sec
;
2246 section_addrs
->other
[sec_num
].addr
= addr
;
2247 printf_unfiltered ("\t%s_addr = %s\n",
2248 sec
, hex_string ((unsigned long)addr
));
2251 /* The object's sections are initialized when a
2252 call is made to build_objfile_section_table (objfile).
2253 This happens in reread_symbols.
2254 At this point, we don't know what file type this is,
2255 so we can't determine what section names are valid. */
2258 if (from_tty
&& (!query ("%s", "")))
2259 error (_("Not confirmed."));
2261 symbol_file_add (filename
, from_tty
, section_addrs
, 0, flags
);
2263 /* Getting new symbols may change our opinion about what is
2265 reinit_frame_cache ();
2266 do_cleanups (my_cleanups
);
2270 add_shared_symbol_files_command (char *args
, int from_tty
)
2272 #ifdef ADD_SHARED_SYMBOL_FILES
2273 ADD_SHARED_SYMBOL_FILES (args
, from_tty
);
2275 error (_("This command is not available in this configuration of GDB."));
2279 /* Re-read symbols if a symbol-file has changed. */
2281 reread_symbols (void)
2283 struct objfile
*objfile
;
2286 struct stat new_statbuf
;
2289 /* With the addition of shared libraries, this should be modified,
2290 the load time should be saved in the partial symbol tables, since
2291 different tables may come from different source files. FIXME.
2292 This routine should then walk down each partial symbol table
2293 and see if the symbol table that it originates from has been changed */
2295 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2299 #ifdef DEPRECATED_IBM6000_TARGET
2300 /* If this object is from a shared library, then you should
2301 stat on the library name, not member name. */
2303 if (objfile
->obfd
->my_archive
)
2304 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2307 res
= stat (objfile
->name
, &new_statbuf
);
2310 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2311 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2315 new_modtime
= new_statbuf
.st_mtime
;
2316 if (new_modtime
!= objfile
->mtime
)
2318 struct cleanup
*old_cleanups
;
2319 struct section_offsets
*offsets
;
2321 char *obfd_filename
;
2323 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2326 /* There are various functions like symbol_file_add,
2327 symfile_bfd_open, syms_from_objfile, etc., which might
2328 appear to do what we want. But they have various other
2329 effects which we *don't* want. So we just do stuff
2330 ourselves. We don't worry about mapped files (for one thing,
2331 any mapped file will be out of date). */
2333 /* If we get an error, blow away this objfile (not sure if
2334 that is the correct response for things like shared
2336 old_cleanups
= make_cleanup_free_objfile (objfile
);
2337 /* We need to do this whenever any symbols go away. */
2338 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2340 /* Clean up any state BFD has sitting around. We don't need
2341 to close the descriptor but BFD lacks a way of closing the
2342 BFD without closing the descriptor. */
2343 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2344 if (!bfd_close (objfile
->obfd
))
2345 error (_("Can't close BFD for %s: %s"), objfile
->name
,
2346 bfd_errmsg (bfd_get_error ()));
2347 objfile
->obfd
= bfd_openr (obfd_filename
, gnutarget
);
2348 if (objfile
->obfd
== NULL
)
2349 error (_("Can't open %s to read symbols."), objfile
->name
);
2350 /* bfd_openr sets cacheable to true, which is what we want. */
2351 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2352 error (_("Can't read symbols from %s: %s."), objfile
->name
,
2353 bfd_errmsg (bfd_get_error ()));
2355 /* Save the offsets, we will nuke them with the rest of the
2357 num_offsets
= objfile
->num_sections
;
2358 offsets
= ((struct section_offsets
*)
2359 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2360 memcpy (offsets
, objfile
->section_offsets
,
2361 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2363 /* Remove any references to this objfile in the global
2365 preserve_values (objfile
);
2367 /* Nuke all the state that we will re-read. Much of the following
2368 code which sets things to NULL really is necessary to tell
2369 other parts of GDB that there is nothing currently there. */
2371 /* FIXME: Do we have to free a whole linked list, or is this
2373 if (objfile
->global_psymbols
.list
)
2374 xfree (objfile
->global_psymbols
.list
);
2375 memset (&objfile
->global_psymbols
, 0,
2376 sizeof (objfile
->global_psymbols
));
2377 if (objfile
->static_psymbols
.list
)
2378 xfree (objfile
->static_psymbols
.list
);
2379 memset (&objfile
->static_psymbols
, 0,
2380 sizeof (objfile
->static_psymbols
));
2382 /* Free the obstacks for non-reusable objfiles */
2383 bcache_xfree (objfile
->psymbol_cache
);
2384 objfile
->psymbol_cache
= bcache_xmalloc ();
2385 bcache_xfree (objfile
->macro_cache
);
2386 objfile
->macro_cache
= bcache_xmalloc ();
2387 if (objfile
->demangled_names_hash
!= NULL
)
2389 htab_delete (objfile
->demangled_names_hash
);
2390 objfile
->demangled_names_hash
= NULL
;
2392 obstack_free (&objfile
->objfile_obstack
, 0);
2393 objfile
->sections
= NULL
;
2394 objfile
->symtabs
= NULL
;
2395 objfile
->psymtabs
= NULL
;
2396 objfile
->free_psymtabs
= NULL
;
2397 objfile
->cp_namespace_symtab
= NULL
;
2398 objfile
->msymbols
= NULL
;
2399 objfile
->deprecated_sym_private
= NULL
;
2400 objfile
->minimal_symbol_count
= 0;
2401 memset (&objfile
->msymbol_hash
, 0,
2402 sizeof (objfile
->msymbol_hash
));
2403 memset (&objfile
->msymbol_demangled_hash
, 0,
2404 sizeof (objfile
->msymbol_demangled_hash
));
2405 clear_objfile_data (objfile
);
2406 if (objfile
->sf
!= NULL
)
2408 (*objfile
->sf
->sym_finish
) (objfile
);
2411 /* We never make this a mapped file. */
2413 objfile
->psymbol_cache
= bcache_xmalloc ();
2414 objfile
->macro_cache
= bcache_xmalloc ();
2415 /* obstack_init also initializes the obstack so it is
2416 empty. We could use obstack_specify_allocation but
2417 gdb_obstack.h specifies the alloc/dealloc
2419 obstack_init (&objfile
->objfile_obstack
);
2420 if (build_objfile_section_table (objfile
))
2422 error (_("Can't find the file sections in `%s': %s"),
2423 objfile
->name
, bfd_errmsg (bfd_get_error ()));
2425 terminate_minimal_symbol_table (objfile
);
2427 /* We use the same section offsets as from last time. I'm not
2428 sure whether that is always correct for shared libraries. */
2429 objfile
->section_offsets
= (struct section_offsets
*)
2430 obstack_alloc (&objfile
->objfile_obstack
,
2431 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2432 memcpy (objfile
->section_offsets
, offsets
,
2433 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2434 objfile
->num_sections
= num_offsets
;
2436 /* What the hell is sym_new_init for, anyway? The concept of
2437 distinguishing between the main file and additional files
2438 in this way seems rather dubious. */
2439 if (objfile
== symfile_objfile
)
2441 (*objfile
->sf
->sym_new_init
) (objfile
);
2444 (*objfile
->sf
->sym_init
) (objfile
);
2445 clear_complaints (&symfile_complaints
, 1, 1);
2446 /* The "mainline" parameter is a hideous hack; I think leaving it
2447 zero is OK since dbxread.c also does what it needs to do if
2448 objfile->global_psymbols.size is 0. */
2449 (*objfile
->sf
->sym_read
) (objfile
, 0);
2450 if (!have_partial_symbols () && !have_full_symbols ())
2453 printf_unfiltered (_("(no debugging symbols found)\n"));
2456 objfile
->flags
|= OBJF_SYMS
;
2458 /* We're done reading the symbol file; finish off complaints. */
2459 clear_complaints (&symfile_complaints
, 0, 1);
2461 /* Getting new symbols may change our opinion about what is
2464 reinit_frame_cache ();
2466 /* Discard cleanups as symbol reading was successful. */
2467 discard_cleanups (old_cleanups
);
2469 /* If the mtime has changed between the time we set new_modtime
2470 and now, we *want* this to be out of date, so don't call stat
2472 objfile
->mtime
= new_modtime
;
2474 reread_separate_symbols (objfile
);
2481 clear_symtab_users ();
2482 /* At least one objfile has changed, so we can consider that
2483 the executable we're debugging has changed too. */
2484 observer_notify_executable_changed (NULL
);
2490 /* Handle separate debug info for OBJFILE, which has just been
2492 - If we had separate debug info before, but now we don't, get rid
2493 of the separated objfile.
2494 - If we didn't have separated debug info before, but now we do,
2495 read in the new separated debug info file.
2496 - If the debug link points to a different file, toss the old one
2497 and read the new one.
2498 This function does *not* handle the case where objfile is still
2499 using the same separate debug info file, but that file's timestamp
2500 has changed. That case should be handled by the loop in
2501 reread_symbols already. */
2503 reread_separate_symbols (struct objfile
*objfile
)
2506 unsigned long crc32
;
2508 /* Does the updated objfile's debug info live in a
2510 debug_file
= find_separate_debug_file (objfile
);
2512 if (objfile
->separate_debug_objfile
)
2514 /* There are two cases where we need to get rid of
2515 the old separated debug info objfile:
2516 - if the new primary objfile doesn't have
2517 separated debug info, or
2518 - if the new primary objfile has separate debug
2519 info, but it's under a different filename.
2521 If the old and new objfiles both have separate
2522 debug info, under the same filename, then we're
2523 okay --- if the separated file's contents have
2524 changed, we will have caught that when we
2525 visited it in this function's outermost
2528 || strcmp (debug_file
, objfile
->separate_debug_objfile
->name
) != 0)
2529 free_objfile (objfile
->separate_debug_objfile
);
2532 /* If the new objfile has separate debug info, and we
2533 haven't loaded it already, do so now. */
2535 && ! objfile
->separate_debug_objfile
)
2537 /* Use the same section offset table as objfile itself.
2538 Preserve the flags from objfile that make sense. */
2539 objfile
->separate_debug_objfile
2540 = (symbol_file_add_with_addrs_or_offsets
2541 (symfile_bfd_open (debug_file
),
2542 info_verbose
, /* from_tty: Don't override the default. */
2543 0, /* No addr table. */
2544 objfile
->section_offsets
, objfile
->num_sections
,
2545 0, /* Not mainline. See comments about this above. */
2546 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
2547 | OBJF_USERLOADED
)));
2548 objfile
->separate_debug_objfile
->separate_debug_objfile_backlink
2566 static filename_language
*filename_language_table
;
2567 static int fl_table_size
, fl_table_next
;
2570 add_filename_language (char *ext
, enum language lang
)
2572 if (fl_table_next
>= fl_table_size
)
2574 fl_table_size
+= 10;
2575 filename_language_table
=
2576 xrealloc (filename_language_table
,
2577 fl_table_size
* sizeof (*filename_language_table
));
2580 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2581 filename_language_table
[fl_table_next
].lang
= lang
;
2585 static char *ext_args
;
2587 show_ext_args (struct ui_file
*file
, int from_tty
,
2588 struct cmd_list_element
*c
, const char *value
)
2590 fprintf_filtered (file
, _("\
2591 Mapping between filename extension and source language is \"%s\".\n"),
2596 set_ext_lang_command (char *args
, int from_tty
, struct cmd_list_element
*e
)
2599 char *cp
= ext_args
;
2602 /* First arg is filename extension, starting with '.' */
2604 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2606 /* Find end of first arg. */
2607 while (*cp
&& !isspace (*cp
))
2611 error (_("'%s': two arguments required -- filename extension and language"),
2614 /* Null-terminate first arg */
2617 /* Find beginning of second arg, which should be a source language. */
2618 while (*cp
&& isspace (*cp
))
2622 error (_("'%s': two arguments required -- filename extension and language"),
2625 /* Lookup the language from among those we know. */
2626 lang
= language_enum (cp
);
2628 /* Now lookup the filename extension: do we already know it? */
2629 for (i
= 0; i
< fl_table_next
; i
++)
2630 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2633 if (i
>= fl_table_next
)
2635 /* new file extension */
2636 add_filename_language (ext_args
, lang
);
2640 /* redefining a previously known filename extension */
2643 /* query ("Really make files of type %s '%s'?", */
2644 /* ext_args, language_str (lang)); */
2646 xfree (filename_language_table
[i
].ext
);
2647 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2648 filename_language_table
[i
].lang
= lang
;
2653 info_ext_lang_command (char *args
, int from_tty
)
2657 printf_filtered (_("Filename extensions and the languages they represent:"));
2658 printf_filtered ("\n\n");
2659 for (i
= 0; i
< fl_table_next
; i
++)
2660 printf_filtered ("\t%s\t- %s\n",
2661 filename_language_table
[i
].ext
,
2662 language_str (filename_language_table
[i
].lang
));
2666 init_filename_language_table (void)
2668 if (fl_table_size
== 0) /* protect against repetition */
2672 filename_language_table
=
2673 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
2674 add_filename_language (".c", language_c
);
2675 add_filename_language (".C", language_cplus
);
2676 add_filename_language (".cc", language_cplus
);
2677 add_filename_language (".cp", language_cplus
);
2678 add_filename_language (".cpp", language_cplus
);
2679 add_filename_language (".cxx", language_cplus
);
2680 add_filename_language (".c++", language_cplus
);
2681 add_filename_language (".java", language_java
);
2682 add_filename_language (".class", language_java
);
2683 add_filename_language (".m", language_objc
);
2684 add_filename_language (".f", language_fortran
);
2685 add_filename_language (".F", language_fortran
);
2686 add_filename_language (".s", language_asm
);
2687 add_filename_language (".sx", language_asm
);
2688 add_filename_language (".S", language_asm
);
2689 add_filename_language (".pas", language_pascal
);
2690 add_filename_language (".p", language_pascal
);
2691 add_filename_language (".pp", language_pascal
);
2692 add_filename_language (".adb", language_ada
);
2693 add_filename_language (".ads", language_ada
);
2694 add_filename_language (".a", language_ada
);
2695 add_filename_language (".ada", language_ada
);
2700 deduce_language_from_filename (char *filename
)
2705 if (filename
!= NULL
)
2706 if ((cp
= strrchr (filename
, '.')) != NULL
)
2707 for (i
= 0; i
< fl_table_next
; i
++)
2708 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2709 return filename_language_table
[i
].lang
;
2711 return language_unknown
;
2716 Allocate and partly initialize a new symbol table. Return a pointer
2717 to it. error() if no space.
2719 Caller must set these fields:
2725 possibly free_named_symtabs (symtab->filename);
2729 allocate_symtab (char *filename
, struct objfile
*objfile
)
2731 struct symtab
*symtab
;
2733 symtab
= (struct symtab
*)
2734 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symtab
));
2735 memset (symtab
, 0, sizeof (*symtab
));
2736 symtab
->filename
= obsavestring (filename
, strlen (filename
),
2737 &objfile
->objfile_obstack
);
2738 symtab
->fullname
= NULL
;
2739 symtab
->language
= deduce_language_from_filename (filename
);
2740 symtab
->debugformat
= obsavestring ("unknown", 7,
2741 &objfile
->objfile_obstack
);
2743 /* Hook it to the objfile it comes from */
2745 symtab
->objfile
= objfile
;
2746 symtab
->next
= objfile
->symtabs
;
2747 objfile
->symtabs
= symtab
;
2752 struct partial_symtab
*
2753 allocate_psymtab (char *filename
, struct objfile
*objfile
)
2755 struct partial_symtab
*psymtab
;
2757 if (objfile
->free_psymtabs
)
2759 psymtab
= objfile
->free_psymtabs
;
2760 objfile
->free_psymtabs
= psymtab
->next
;
2763 psymtab
= (struct partial_symtab
*)
2764 obstack_alloc (&objfile
->objfile_obstack
,
2765 sizeof (struct partial_symtab
));
2767 memset (psymtab
, 0, sizeof (struct partial_symtab
));
2768 psymtab
->filename
= obsavestring (filename
, strlen (filename
),
2769 &objfile
->objfile_obstack
);
2770 psymtab
->symtab
= NULL
;
2772 /* Prepend it to the psymtab list for the objfile it belongs to.
2773 Psymtabs are searched in most recent inserted -> least recent
2776 psymtab
->objfile
= objfile
;
2777 psymtab
->next
= objfile
->psymtabs
;
2778 objfile
->psymtabs
= psymtab
;
2781 struct partial_symtab
**prev_pst
;
2782 psymtab
->objfile
= objfile
;
2783 psymtab
->next
= NULL
;
2784 prev_pst
= &(objfile
->psymtabs
);
2785 while ((*prev_pst
) != NULL
)
2786 prev_pst
= &((*prev_pst
)->next
);
2787 (*prev_pst
) = psymtab
;
2795 discard_psymtab (struct partial_symtab
*pst
)
2797 struct partial_symtab
**prev_pst
;
2800 Empty psymtabs happen as a result of header files which don't
2801 have any symbols in them. There can be a lot of them. But this
2802 check is wrong, in that a psymtab with N_SLINE entries but
2803 nothing else is not empty, but we don't realize that. Fixing
2804 that without slowing things down might be tricky. */
2806 /* First, snip it out of the psymtab chain */
2808 prev_pst
= &(pst
->objfile
->psymtabs
);
2809 while ((*prev_pst
) != pst
)
2810 prev_pst
= &((*prev_pst
)->next
);
2811 (*prev_pst
) = pst
->next
;
2813 /* Next, put it on a free list for recycling */
2815 pst
->next
= pst
->objfile
->free_psymtabs
;
2816 pst
->objfile
->free_psymtabs
= pst
;
2820 /* Reset all data structures in gdb which may contain references to symbol
2824 clear_symtab_users (void)
2826 /* Someday, we should do better than this, by only blowing away
2827 the things that really need to be blown. */
2829 /* Clear the "current" symtab first, because it is no longer valid.
2830 breakpoint_re_set may try to access the current symtab. */
2831 clear_current_source_symtab_and_line ();
2834 breakpoint_re_set ();
2835 set_default_breakpoint (0, 0, 0, 0);
2836 clear_pc_function_cache ();
2837 observer_notify_new_objfile (NULL
);
2839 /* Clear globals which might have pointed into a removed objfile.
2840 FIXME: It's not clear which of these are supposed to persist
2841 between expressions and which ought to be reset each time. */
2842 expression_context_block
= NULL
;
2843 innermost_block
= NULL
;
2845 /* Varobj may refer to old symbols, perform a cleanup. */
2846 varobj_invalidate ();
2851 clear_symtab_users_cleanup (void *ignore
)
2853 clear_symtab_users ();
2856 /* clear_symtab_users_once:
2858 This function is run after symbol reading, or from a cleanup.
2859 If an old symbol table was obsoleted, the old symbol table
2860 has been blown away, but the other GDB data structures that may
2861 reference it have not yet been cleared or re-directed. (The old
2862 symtab was zapped, and the cleanup queued, in free_named_symtab()
2865 This function can be queued N times as a cleanup, or called
2866 directly; it will do all the work the first time, and then will be a
2867 no-op until the next time it is queued. This works by bumping a
2868 counter at queueing time. Much later when the cleanup is run, or at
2869 the end of symbol processing (in case the cleanup is discarded), if
2870 the queued count is greater than the "done-count", we do the work
2871 and set the done-count to the queued count. If the queued count is
2872 less than or equal to the done-count, we just ignore the call. This
2873 is needed because reading a single .o file will often replace many
2874 symtabs (one per .h file, for example), and we don't want to reset
2875 the breakpoints N times in the user's face.
2877 The reason we both queue a cleanup, and call it directly after symbol
2878 reading, is because the cleanup protects us in case of errors, but is
2879 discarded if symbol reading is successful. */
2882 /* FIXME: As free_named_symtabs is currently a big noop this function
2883 is no longer needed. */
2884 static void clear_symtab_users_once (void);
2886 static int clear_symtab_users_queued
;
2887 static int clear_symtab_users_done
;
2890 clear_symtab_users_once (void)
2892 /* Enforce once-per-`do_cleanups'-semantics */
2893 if (clear_symtab_users_queued
<= clear_symtab_users_done
)
2895 clear_symtab_users_done
= clear_symtab_users_queued
;
2897 clear_symtab_users ();
2901 /* Delete the specified psymtab, and any others that reference it. */
2904 cashier_psymtab (struct partial_symtab
*pst
)
2906 struct partial_symtab
*ps
, *pprev
= NULL
;
2909 /* Find its previous psymtab in the chain */
2910 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2919 /* Unhook it from the chain. */
2920 if (ps
== pst
->objfile
->psymtabs
)
2921 pst
->objfile
->psymtabs
= ps
->next
;
2923 pprev
->next
= ps
->next
;
2925 /* FIXME, we can't conveniently deallocate the entries in the
2926 partial_symbol lists (global_psymbols/static_psymbols) that
2927 this psymtab points to. These just take up space until all
2928 the psymtabs are reclaimed. Ditto the dependencies list and
2929 filename, which are all in the objfile_obstack. */
2931 /* We need to cashier any psymtab that has this one as a dependency... */
2933 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2935 for (i
= 0; i
< ps
->number_of_dependencies
; i
++)
2937 if (ps
->dependencies
[i
] == pst
)
2939 cashier_psymtab (ps
);
2940 goto again
; /* Must restart, chain has been munged. */
2947 /* If a symtab or psymtab for filename NAME is found, free it along
2948 with any dependent breakpoints, displays, etc.
2949 Used when loading new versions of object modules with the "add-file"
2950 command. This is only called on the top-level symtab or psymtab's name;
2951 it is not called for subsidiary files such as .h files.
2953 Return value is 1 if we blew away the environment, 0 if not.
2954 FIXME. The return value appears to never be used.
2956 FIXME. I think this is not the best way to do this. We should
2957 work on being gentler to the environment while still cleaning up
2958 all stray pointers into the freed symtab. */
2961 free_named_symtabs (char *name
)
2964 /* FIXME: With the new method of each objfile having it's own
2965 psymtab list, this function needs serious rethinking. In particular,
2966 why was it ever necessary to toss psymtabs with specific compilation
2967 unit filenames, as opposed to all psymtabs from a particular symbol
2969 Well, the answer is that some systems permit reloading of particular
2970 compilation units. We want to blow away any old info about these
2971 compilation units, regardless of which objfiles they arrived in. --gnu. */
2974 struct symtab
*prev
;
2975 struct partial_symtab
*ps
;
2976 struct blockvector
*bv
;
2979 /* We only wack things if the symbol-reload switch is set. */
2980 if (!symbol_reloading
)
2983 /* Some symbol formats have trouble providing file names... */
2984 if (name
== 0 || *name
== '\0')
2987 /* Look for a psymtab with the specified name. */
2990 for (ps
= partial_symtab_list
; ps
; ps
= ps
->next
)
2992 if (strcmp (name
, ps
->filename
) == 0)
2994 cashier_psymtab (ps
); /* Blow it away...and its little dog, too. */
2995 goto again2
; /* Must restart, chain has been munged */
2999 /* Look for a symtab with the specified name. */
3001 for (s
= symtab_list
; s
; s
= s
->next
)
3003 if (strcmp (name
, s
->filename
) == 0)
3010 if (s
== symtab_list
)
3011 symtab_list
= s
->next
;
3013 prev
->next
= s
->next
;
3015 /* For now, queue a delete for all breakpoints, displays, etc., whether
3016 or not they depend on the symtab being freed. This should be
3017 changed so that only those data structures affected are deleted. */
3019 /* But don't delete anything if the symtab is empty.
3020 This test is necessary due to a bug in "dbxread.c" that
3021 causes empty symtabs to be created for N_SO symbols that
3022 contain the pathname of the object file. (This problem
3023 has been fixed in GDB 3.9x). */
3025 bv
= BLOCKVECTOR (s
);
3026 if (BLOCKVECTOR_NBLOCKS (bv
) > 2
3027 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
))
3028 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)))
3030 complaint (&symfile_complaints
, _("Replacing old symbols for `%s'"),
3032 clear_symtab_users_queued
++;
3033 make_cleanup (clear_symtab_users_once
, 0);
3037 complaint (&symfile_complaints
, _("Empty symbol table found for `%s'"),
3044 /* It is still possible that some breakpoints will be affected
3045 even though no symtab was found, since the file might have
3046 been compiled without debugging, and hence not be associated
3047 with a symtab. In order to handle this correctly, we would need
3048 to keep a list of text address ranges for undebuggable files.
3049 For now, we do nothing, since this is a fairly obscure case. */
3053 /* FIXME, what about the minimal symbol table? */
3060 /* Allocate and partially fill a partial symtab. It will be
3061 completely filled at the end of the symbol list.
3063 FILENAME is the name of the symbol-file we are reading from. */
3065 struct partial_symtab
*
3066 start_psymtab_common (struct objfile
*objfile
,
3067 struct section_offsets
*section_offsets
, char *filename
,
3068 CORE_ADDR textlow
, struct partial_symbol
**global_syms
,
3069 struct partial_symbol
**static_syms
)
3071 struct partial_symtab
*psymtab
;
3073 psymtab
= allocate_psymtab (filename
, objfile
);
3074 psymtab
->section_offsets
= section_offsets
;
3075 psymtab
->textlow
= textlow
;
3076 psymtab
->texthigh
= psymtab
->textlow
; /* default */
3077 psymtab
->globals_offset
= global_syms
- objfile
->global_psymbols
.list
;
3078 psymtab
->statics_offset
= static_syms
- objfile
->static_psymbols
.list
;
3082 /* Add a symbol with a long value to a psymtab.
3083 Since one arg is a struct, we pass in a ptr and deref it (sigh).
3084 Return the partial symbol that has been added. */
3086 /* NOTE: carlton/2003-09-11: The reason why we return the partial
3087 symbol is so that callers can get access to the symbol's demangled
3088 name, which they don't have any cheap way to determine otherwise.
3089 (Currenly, dwarf2read.c is the only file who uses that information,
3090 though it's possible that other readers might in the future.)
3091 Elena wasn't thrilled about that, and I don't blame her, but we
3092 couldn't come up with a better way to get that information. If
3093 it's needed in other situations, we could consider breaking up
3094 SYMBOL_SET_NAMES to provide access to the demangled name lookup
3097 const struct partial_symbol
*
3098 add_psymbol_to_list (char *name
, int namelength
, domain_enum domain
,
3099 enum address_class
class,
3100 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
3101 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
3102 enum language language
, struct objfile
*objfile
)
3104 struct partial_symbol
*psym
;
3105 char *buf
= alloca (namelength
+ 1);
3106 /* psymbol is static so that there will be no uninitialized gaps in the
3107 structure which might contain random data, causing cache misses in
3109 static struct partial_symbol psymbol
;
3111 /* Create local copy of the partial symbol */
3112 memcpy (buf
, name
, namelength
);
3113 buf
[namelength
] = '\0';
3114 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
3117 SYMBOL_VALUE (&psymbol
) = val
;
3121 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
3123 SYMBOL_SECTION (&psymbol
) = 0;
3124 SYMBOL_LANGUAGE (&psymbol
) = language
;
3125 PSYMBOL_DOMAIN (&psymbol
) = domain
;
3126 PSYMBOL_CLASS (&psymbol
) = class;
3128 SYMBOL_SET_NAMES (&psymbol
, buf
, namelength
, objfile
);
3130 /* Stash the partial symbol away in the cache */
3131 psym
= deprecated_bcache (&psymbol
, sizeof (struct partial_symbol
),
3132 objfile
->psymbol_cache
);
3134 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
3135 if (list
->next
>= list
->list
+ list
->size
)
3137 extend_psymbol_list (list
, objfile
);
3139 *list
->next
++ = psym
;
3140 OBJSTAT (objfile
, n_psyms
++);
3145 /* Initialize storage for partial symbols. */
3148 init_psymbol_list (struct objfile
*objfile
, int total_symbols
)
3150 /* Free any previously allocated psymbol lists. */
3152 if (objfile
->global_psymbols
.list
)
3154 xfree (objfile
->global_psymbols
.list
);
3156 if (objfile
->static_psymbols
.list
)
3158 xfree (objfile
->static_psymbols
.list
);
3161 /* Current best guess is that approximately a twentieth
3162 of the total symbols (in a debugging file) are global or static
3165 objfile
->global_psymbols
.size
= total_symbols
/ 10;
3166 objfile
->static_psymbols
.size
= total_symbols
/ 10;
3168 if (objfile
->global_psymbols
.size
> 0)
3170 objfile
->global_psymbols
.next
=
3171 objfile
->global_psymbols
.list
= (struct partial_symbol
**)
3172 xmalloc ((objfile
->global_psymbols
.size
3173 * sizeof (struct partial_symbol
*)));
3175 if (objfile
->static_psymbols
.size
> 0)
3177 objfile
->static_psymbols
.next
=
3178 objfile
->static_psymbols
.list
= (struct partial_symbol
**)
3179 xmalloc ((objfile
->static_psymbols
.size
3180 * sizeof (struct partial_symbol
*)));
3185 The following code implements an abstraction for debugging overlay sections.
3187 The target model is as follows:
3188 1) The gnu linker will permit multiple sections to be mapped into the
3189 same VMA, each with its own unique LMA (or load address).
3190 2) It is assumed that some runtime mechanism exists for mapping the
3191 sections, one by one, from the load address into the VMA address.
3192 3) This code provides a mechanism for gdb to keep track of which
3193 sections should be considered to be mapped from the VMA to the LMA.
3194 This information is used for symbol lookup, and memory read/write.
3195 For instance, if a section has been mapped then its contents
3196 should be read from the VMA, otherwise from the LMA.
3198 Two levels of debugger support for overlays are available. One is
3199 "manual", in which the debugger relies on the user to tell it which
3200 overlays are currently mapped. This level of support is
3201 implemented entirely in the core debugger, and the information about
3202 whether a section is mapped is kept in the objfile->obj_section table.
3204 The second level of support is "automatic", and is only available if
3205 the target-specific code provides functionality to read the target's
3206 overlay mapping table, and translate its contents for the debugger
3207 (by updating the mapped state information in the obj_section tables).
3209 The interface is as follows:
3211 overlay map <name> -- tell gdb to consider this section mapped
3212 overlay unmap <name> -- tell gdb to consider this section unmapped
3213 overlay list -- list the sections that GDB thinks are mapped
3214 overlay read-target -- get the target's state of what's mapped
3215 overlay off/manual/auto -- set overlay debugging state
3216 Functional interface:
3217 find_pc_mapped_section(pc): if the pc is in the range of a mapped
3218 section, return that section.
3219 find_pc_overlay(pc): find any overlay section that contains
3220 the pc, either in its VMA or its LMA
3221 overlay_is_mapped(sect): true if overlay is marked as mapped
3222 section_is_overlay(sect): true if section's VMA != LMA
3223 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
3224 pc_in_unmapped_range(...): true if pc belongs to section's LMA
3225 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
3226 overlay_mapped_address(...): map an address from section's LMA to VMA
3227 overlay_unmapped_address(...): map an address from section's VMA to LMA
3228 symbol_overlayed_address(...): Return a "current" address for symbol:
3229 either in VMA or LMA depending on whether
3230 the symbol's section is currently mapped
3233 /* Overlay debugging state: */
3235 enum overlay_debugging_state overlay_debugging
= ovly_off
;
3236 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
3238 /* Function: section_is_overlay (SECTION)
3239 Returns true if SECTION has VMA not equal to LMA, ie.
3240 SECTION is loaded at an address different from where it will "run". */
3243 section_is_overlay (asection
*section
)
3245 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
3247 if (overlay_debugging
)
3248 if (section
&& section
->lma
!= 0 &&
3249 section
->vma
!= section
->lma
)
3255 /* Function: overlay_invalidate_all (void)
3256 Invalidate the mapped state of all overlay sections (mark it as stale). */
3259 overlay_invalidate_all (void)
3261 struct objfile
*objfile
;
3262 struct obj_section
*sect
;
3264 ALL_OBJSECTIONS (objfile
, sect
)
3265 if (section_is_overlay (sect
->the_bfd_section
))
3266 sect
->ovly_mapped
= -1;
3269 /* Function: overlay_is_mapped (SECTION)
3270 Returns true if section is an overlay, and is currently mapped.
3271 Private: public access is thru function section_is_mapped.
3273 Access to the ovly_mapped flag is restricted to this function, so
3274 that we can do automatic update. If the global flag
3275 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
3276 overlay_invalidate_all. If the mapped state of the particular
3277 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
3280 overlay_is_mapped (struct obj_section
*osect
)
3282 if (osect
== 0 || !section_is_overlay (osect
->the_bfd_section
))
3285 switch (overlay_debugging
)
3289 return 0; /* overlay debugging off */
3290 case ovly_auto
: /* overlay debugging automatic */
3291 /* Unles there is a gdbarch_overlay_update function,
3292 there's really nothing useful to do here (can't really go auto) */
3293 if (gdbarch_overlay_update_p (current_gdbarch
))
3295 if (overlay_cache_invalid
)
3297 overlay_invalidate_all ();
3298 overlay_cache_invalid
= 0;
3300 if (osect
->ovly_mapped
== -1)
3301 gdbarch_overlay_update (current_gdbarch
, osect
);
3303 /* fall thru to manual case */
3304 case ovly_on
: /* overlay debugging manual */
3305 return osect
->ovly_mapped
== 1;
3309 /* Function: section_is_mapped
3310 Returns true if section is an overlay, and is currently mapped. */
3313 section_is_mapped (asection
*section
)
3315 struct objfile
*objfile
;
3316 struct obj_section
*osect
;
3318 if (overlay_debugging
)
3319 if (section
&& section_is_overlay (section
))
3320 ALL_OBJSECTIONS (objfile
, osect
)
3321 if (osect
->the_bfd_section
== section
)
3322 return overlay_is_mapped (osect
);
3327 /* Function: pc_in_unmapped_range
3328 If PC falls into the lma range of SECTION, return true, else false. */
3331 pc_in_unmapped_range (CORE_ADDR pc
, asection
*section
)
3333 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
3337 if (overlay_debugging
)
3338 if (section
&& section_is_overlay (section
))
3340 size
= bfd_get_section_size (section
);
3341 if (section
->lma
<= pc
&& pc
< section
->lma
+ size
)
3347 /* Function: pc_in_mapped_range
3348 If PC falls into the vma range of SECTION, return true, else false. */
3351 pc_in_mapped_range (CORE_ADDR pc
, asection
*section
)
3353 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3357 if (overlay_debugging
)
3358 if (section
&& section_is_overlay (section
))
3360 size
= bfd_get_section_size (section
);
3361 if (section
->vma
<= pc
&& pc
< section
->vma
+ size
)
3368 /* Return true if the mapped ranges of sections A and B overlap, false
3371 sections_overlap (asection
*a
, asection
*b
)
3373 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3375 CORE_ADDR a_start
= a
->vma
;
3376 CORE_ADDR a_end
= a
->vma
+ bfd_get_section_size (a
);
3377 CORE_ADDR b_start
= b
->vma
;
3378 CORE_ADDR b_end
= b
->vma
+ bfd_get_section_size (b
);
3380 return (a_start
< b_end
&& b_start
< a_end
);
3383 /* Function: overlay_unmapped_address (PC, SECTION)
3384 Returns the address corresponding to PC in the unmapped (load) range.
3385 May be the same as PC. */
3388 overlay_unmapped_address (CORE_ADDR pc
, asection
*section
)
3390 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
3392 if (overlay_debugging
)
3393 if (section
&& section_is_overlay (section
) &&
3394 pc_in_mapped_range (pc
, section
))
3395 return pc
+ section
->lma
- section
->vma
;
3400 /* Function: overlay_mapped_address (PC, SECTION)
3401 Returns the address corresponding to PC in the mapped (runtime) range.
3402 May be the same as PC. */
3405 overlay_mapped_address (CORE_ADDR pc
, asection
*section
)
3407 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3409 if (overlay_debugging
)
3410 if (section
&& section_is_overlay (section
) &&
3411 pc_in_unmapped_range (pc
, section
))
3412 return pc
+ section
->vma
- section
->lma
;
3418 /* Function: symbol_overlayed_address
3419 Return one of two addresses (relative to the VMA or to the LMA),
3420 depending on whether the section is mapped or not. */
3423 symbol_overlayed_address (CORE_ADDR address
, asection
*section
)
3425 if (overlay_debugging
)
3427 /* If the symbol has no section, just return its regular address. */
3430 /* If the symbol's section is not an overlay, just return its address */
3431 if (!section_is_overlay (section
))
3433 /* If the symbol's section is mapped, just return its address */
3434 if (section_is_mapped (section
))
3437 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3438 * then return its LOADED address rather than its vma address!!
3440 return overlay_unmapped_address (address
, section
);
3445 /* Function: find_pc_overlay (PC)
3446 Return the best-match overlay section for PC:
3447 If PC matches a mapped overlay section's VMA, return that section.
3448 Else if PC matches an unmapped section's VMA, return that section.
3449 Else if PC matches an unmapped section's LMA, return that section. */
3452 find_pc_overlay (CORE_ADDR pc
)
3454 struct objfile
*objfile
;
3455 struct obj_section
*osect
, *best_match
= NULL
;
3457 if (overlay_debugging
)
3458 ALL_OBJSECTIONS (objfile
, osect
)
3459 if (section_is_overlay (osect
->the_bfd_section
))
3461 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
))
3463 if (overlay_is_mapped (osect
))
3464 return osect
->the_bfd_section
;
3468 else if (pc_in_unmapped_range (pc
, osect
->the_bfd_section
))
3471 return best_match
? best_match
->the_bfd_section
: NULL
;
3474 /* Function: find_pc_mapped_section (PC)
3475 If PC falls into the VMA address range of an overlay section that is
3476 currently marked as MAPPED, return that section. Else return NULL. */
3479 find_pc_mapped_section (CORE_ADDR pc
)
3481 struct objfile
*objfile
;
3482 struct obj_section
*osect
;
3484 if (overlay_debugging
)
3485 ALL_OBJSECTIONS (objfile
, osect
)
3486 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
) &&
3487 overlay_is_mapped (osect
))
3488 return osect
->the_bfd_section
;
3493 /* Function: list_overlays_command
3494 Print a list of mapped sections and their PC ranges */
3497 list_overlays_command (char *args
, int from_tty
)
3500 struct objfile
*objfile
;
3501 struct obj_section
*osect
;
3503 if (overlay_debugging
)
3504 ALL_OBJSECTIONS (objfile
, osect
)
3505 if (overlay_is_mapped (osect
))
3511 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3512 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3513 size
= bfd_get_section_size (osect
->the_bfd_section
);
3514 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3516 printf_filtered ("Section %s, loaded at ", name
);
3517 fputs_filtered (paddress (lma
), gdb_stdout
);
3518 puts_filtered (" - ");
3519 fputs_filtered (paddress (lma
+ size
), gdb_stdout
);
3520 printf_filtered (", mapped at ");
3521 fputs_filtered (paddress (vma
), gdb_stdout
);
3522 puts_filtered (" - ");
3523 fputs_filtered (paddress (vma
+ size
), gdb_stdout
);
3524 puts_filtered ("\n");
3529 printf_filtered (_("No sections are mapped.\n"));
3532 /* Function: map_overlay_command
3533 Mark the named section as mapped (ie. residing at its VMA address). */
3536 map_overlay_command (char *args
, int from_tty
)
3538 struct objfile
*objfile
, *objfile2
;
3539 struct obj_section
*sec
, *sec2
;
3542 if (!overlay_debugging
)
3544 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3545 the 'overlay manual' command."));
3547 if (args
== 0 || *args
== 0)
3548 error (_("Argument required: name of an overlay section"));
3550 /* First, find a section matching the user supplied argument */
3551 ALL_OBJSECTIONS (objfile
, sec
)
3552 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3554 /* Now, check to see if the section is an overlay. */
3555 bfdsec
= sec
->the_bfd_section
;
3556 if (!section_is_overlay (bfdsec
))
3557 continue; /* not an overlay section */
3559 /* Mark the overlay as "mapped" */
3560 sec
->ovly_mapped
= 1;
3562 /* Next, make a pass and unmap any sections that are
3563 overlapped by this new section: */
3564 ALL_OBJSECTIONS (objfile2
, sec2
)
3565 if (sec2
->ovly_mapped
3567 && sec
->the_bfd_section
!= sec2
->the_bfd_section
3568 && sections_overlap (sec
->the_bfd_section
,
3569 sec2
->the_bfd_section
))
3572 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3573 bfd_section_name (objfile
->obfd
,
3574 sec2
->the_bfd_section
));
3575 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
3579 error (_("No overlay section called %s"), args
);
3582 /* Function: unmap_overlay_command
3583 Mark the overlay section as unmapped
3584 (ie. resident in its LMA address range, rather than the VMA range). */
3587 unmap_overlay_command (char *args
, int from_tty
)
3589 struct objfile
*objfile
;
3590 struct obj_section
*sec
;
3592 if (!overlay_debugging
)
3594 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3595 the 'overlay manual' command."));
3597 if (args
== 0 || *args
== 0)
3598 error (_("Argument required: name of an overlay section"));
3600 /* First, find a section matching the user supplied argument */
3601 ALL_OBJSECTIONS (objfile
, sec
)
3602 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3604 if (!sec
->ovly_mapped
)
3605 error (_("Section %s is not mapped"), args
);
3606 sec
->ovly_mapped
= 0;
3609 error (_("No overlay section called %s"), args
);
3612 /* Function: overlay_auto_command
3613 A utility command to turn on overlay debugging.
3614 Possibly this should be done via a set/show command. */
3617 overlay_auto_command (char *args
, int from_tty
)
3619 overlay_debugging
= ovly_auto
;
3620 enable_overlay_breakpoints ();
3622 printf_unfiltered (_("Automatic overlay debugging enabled."));
3625 /* Function: overlay_manual_command
3626 A utility command to turn on overlay debugging.
3627 Possibly this should be done via a set/show command. */
3630 overlay_manual_command (char *args
, int from_tty
)
3632 overlay_debugging
= ovly_on
;
3633 disable_overlay_breakpoints ();
3635 printf_unfiltered (_("Overlay debugging enabled."));
3638 /* Function: overlay_off_command
3639 A utility command to turn on overlay debugging.
3640 Possibly this should be done via a set/show command. */
3643 overlay_off_command (char *args
, int from_tty
)
3645 overlay_debugging
= ovly_off
;
3646 disable_overlay_breakpoints ();
3648 printf_unfiltered (_("Overlay debugging disabled."));
3652 overlay_load_command (char *args
, int from_tty
)
3654 if (gdbarch_overlay_update_p (current_gdbarch
))
3655 gdbarch_overlay_update (current_gdbarch
, NULL
);
3657 error (_("This target does not know how to read its overlay state."));
3660 /* Function: overlay_command
3661 A place-holder for a mis-typed command */
3663 /* Command list chain containing all defined "overlay" subcommands. */
3664 struct cmd_list_element
*overlaylist
;
3667 overlay_command (char *args
, int from_tty
)
3670 ("\"overlay\" must be followed by the name of an overlay command.\n");
3671 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3675 /* Target Overlays for the "Simplest" overlay manager:
3677 This is GDB's default target overlay layer. It works with the
3678 minimal overlay manager supplied as an example by Cygnus. The
3679 entry point is via a function pointer "gdbarch_overlay_update",
3680 so targets that use a different runtime overlay manager can
3681 substitute their own overlay_update function and take over the
3684 The overlay_update function pokes around in the target's data structures
3685 to see what overlays are mapped, and updates GDB's overlay mapping with
3688 In this simple implementation, the target data structures are as follows:
3689 unsigned _novlys; /# number of overlay sections #/
3690 unsigned _ovly_table[_novlys][4] = {
3691 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3692 {..., ..., ..., ...},
3694 unsigned _novly_regions; /# number of overlay regions #/
3695 unsigned _ovly_region_table[_novly_regions][3] = {
3696 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3699 These functions will attempt to update GDB's mappedness state in the
3700 symbol section table, based on the target's mappedness state.
3702 To do this, we keep a cached copy of the target's _ovly_table, and
3703 attempt to detect when the cached copy is invalidated. The main
3704 entry point is "simple_overlay_update(SECT), which looks up SECT in
3705 the cached table and re-reads only the entry for that section from
3706 the target (whenever possible).
3709 /* Cached, dynamically allocated copies of the target data structures: */
3710 static unsigned (*cache_ovly_table
)[4] = 0;
3712 static unsigned (*cache_ovly_region_table
)[3] = 0;
3714 static unsigned cache_novlys
= 0;
3716 static unsigned cache_novly_regions
= 0;
3718 static CORE_ADDR cache_ovly_table_base
= 0;
3720 static CORE_ADDR cache_ovly_region_table_base
= 0;
3724 VMA
, SIZE
, LMA
, MAPPED
3726 #define TARGET_LONG_BYTES (gdbarch_long_bit (current_gdbarch) \
3729 /* Throw away the cached copy of _ovly_table */
3731 simple_free_overlay_table (void)
3733 if (cache_ovly_table
)
3734 xfree (cache_ovly_table
);
3736 cache_ovly_table
= NULL
;
3737 cache_ovly_table_base
= 0;
3741 /* Throw away the cached copy of _ovly_region_table */
3743 simple_free_overlay_region_table (void)
3745 if (cache_ovly_region_table
)
3746 xfree (cache_ovly_region_table
);
3747 cache_novly_regions
= 0;
3748 cache_ovly_region_table
= NULL
;
3749 cache_ovly_region_table_base
= 0;
3753 /* Read an array of ints from the target into a local buffer.
3754 Convert to host order. int LEN is number of ints */
3756 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
, int len
)
3758 /* FIXME (alloca): Not safe if array is very large. */
3759 gdb_byte
*buf
= alloca (len
* TARGET_LONG_BYTES
);
3762 read_memory (memaddr
, buf
, len
* TARGET_LONG_BYTES
);
3763 for (i
= 0; i
< len
; i
++)
3764 myaddr
[i
] = extract_unsigned_integer (TARGET_LONG_BYTES
* i
+ buf
,
3768 /* Find and grab a copy of the target _ovly_table
3769 (and _novlys, which is needed for the table's size) */
3771 simple_read_overlay_table (void)
3773 struct minimal_symbol
*novlys_msym
, *ovly_table_msym
;
3775 simple_free_overlay_table ();
3776 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3779 error (_("Error reading inferior's overlay table: "
3780 "couldn't find `_novlys' variable\n"
3781 "in inferior. Use `overlay manual' mode."));
3785 ovly_table_msym
= lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3786 if (! ovly_table_msym
)
3788 error (_("Error reading inferior's overlay table: couldn't find "
3789 "`_ovly_table' array\n"
3790 "in inferior. Use `overlay manual' mode."));
3794 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
), 4);
3796 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3797 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3798 read_target_long_array (cache_ovly_table_base
,
3799 (unsigned int *) cache_ovly_table
,
3802 return 1; /* SUCCESS */
3806 /* Find and grab a copy of the target _ovly_region_table
3807 (and _novly_regions, which is needed for the table's size) */
3809 simple_read_overlay_region_table (void)
3811 struct minimal_symbol
*msym
;
3813 simple_free_overlay_region_table ();
3814 msym
= lookup_minimal_symbol ("_novly_regions", NULL
, NULL
);
3816 cache_novly_regions
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
3818 return 0; /* failure */
3819 cache_ovly_region_table
= (void *) xmalloc (cache_novly_regions
* 12);
3820 if (cache_ovly_region_table
!= NULL
)
3822 msym
= lookup_minimal_symbol ("_ovly_region_table", NULL
, NULL
);
3825 cache_ovly_region_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3826 read_target_long_array (cache_ovly_region_table_base
,
3827 (unsigned int *) cache_ovly_region_table
,
3828 cache_novly_regions
* 3);
3831 return 0; /* failure */
3834 return 0; /* failure */
3835 return 1; /* SUCCESS */
3839 /* Function: simple_overlay_update_1
3840 A helper function for simple_overlay_update. Assuming a cached copy
3841 of _ovly_table exists, look through it to find an entry whose vma,
3842 lma and size match those of OSECT. Re-read the entry and make sure
3843 it still matches OSECT (else the table may no longer be valid).
3844 Set OSECT's mapped state to match the entry. Return: 1 for
3845 success, 0 for failure. */
3848 simple_overlay_update_1 (struct obj_section
*osect
)
3851 bfd
*obfd
= osect
->objfile
->obfd
;
3852 asection
*bsect
= osect
->the_bfd_section
;
3854 size
= bfd_get_section_size (osect
->the_bfd_section
);
3855 for (i
= 0; i
< cache_novlys
; i
++)
3856 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3857 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3858 /* && cache_ovly_table[i][SIZE] == size */ )
3860 read_target_long_array (cache_ovly_table_base
+ i
* TARGET_LONG_BYTES
,
3861 (unsigned int *) cache_ovly_table
[i
], 4);
3862 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3863 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3864 /* && cache_ovly_table[i][SIZE] == size */ )
3866 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3869 else /* Warning! Warning! Target's ovly table has changed! */
3875 /* Function: simple_overlay_update
3876 If OSECT is NULL, then update all sections' mapped state
3877 (after re-reading the entire target _ovly_table).
3878 If OSECT is non-NULL, then try to find a matching entry in the
3879 cached ovly_table and update only OSECT's mapped state.
3880 If a cached entry can't be found or the cache isn't valid, then
3881 re-read the entire cache, and go ahead and update all sections. */
3884 simple_overlay_update (struct obj_section
*osect
)
3886 struct objfile
*objfile
;
3888 /* Were we given an osect to look up? NULL means do all of them. */
3890 /* Have we got a cached copy of the target's overlay table? */
3891 if (cache_ovly_table
!= NULL
)
3892 /* Does its cached location match what's currently in the symtab? */
3893 if (cache_ovly_table_base
==
3894 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL
, NULL
)))
3895 /* Then go ahead and try to look up this single section in the cache */
3896 if (simple_overlay_update_1 (osect
))
3897 /* Found it! We're done. */
3900 /* Cached table no good: need to read the entire table anew.
3901 Or else we want all the sections, in which case it's actually
3902 more efficient to read the whole table in one block anyway. */
3904 if (! simple_read_overlay_table ())
3907 /* Now may as well update all sections, even if only one was requested. */
3908 ALL_OBJSECTIONS (objfile
, osect
)
3909 if (section_is_overlay (osect
->the_bfd_section
))
3912 bfd
*obfd
= osect
->objfile
->obfd
;
3913 asection
*bsect
= osect
->the_bfd_section
;
3915 size
= bfd_get_section_size (bsect
);
3916 for (i
= 0; i
< cache_novlys
; i
++)
3917 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3918 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3919 /* && cache_ovly_table[i][SIZE] == size */ )
3920 { /* obj_section matches i'th entry in ovly_table */
3921 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3922 break; /* finished with inner for loop: break out */
3927 /* Set the output sections and output offsets for section SECTP in
3928 ABFD. The relocation code in BFD will read these offsets, so we
3929 need to be sure they're initialized. We map each section to itself,
3930 with no offset; this means that SECTP->vma will be honored. */
3933 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3935 sectp
->output_section
= sectp
;
3936 sectp
->output_offset
= 0;
3939 /* Relocate the contents of a debug section SECTP in ABFD. The
3940 contents are stored in BUF if it is non-NULL, or returned in a
3941 malloc'd buffer otherwise.
3943 For some platforms and debug info formats, shared libraries contain
3944 relocations against the debug sections (particularly for DWARF-2;
3945 one affected platform is PowerPC GNU/Linux, although it depends on
3946 the version of the linker in use). Also, ELF object files naturally
3947 have unresolved relocations for their debug sections. We need to apply
3948 the relocations in order to get the locations of symbols correct. */
3951 symfile_relocate_debug_section (bfd
*abfd
, asection
*sectp
, bfd_byte
*buf
)
3953 /* We're only interested in debugging sections with relocation
3955 if ((sectp
->flags
& SEC_RELOC
) == 0)
3957 if ((sectp
->flags
& SEC_DEBUGGING
) == 0)
3960 /* We will handle section offsets properly elsewhere, so relocate as if
3961 all sections begin at 0. */
3962 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3964 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3967 struct symfile_segment_data
*
3968 get_symfile_segment_data (bfd
*abfd
)
3970 struct sym_fns
*sf
= find_sym_fns (abfd
);
3975 return sf
->sym_segments (abfd
);
3979 free_symfile_segment_data (struct symfile_segment_data
*data
)
3981 xfree (data
->segment_bases
);
3982 xfree (data
->segment_sizes
);
3983 xfree (data
->segment_info
);
3989 - DATA, containing segment addresses from the object file ABFD, and
3990 the mapping from ABFD's sections onto the segments that own them,
3992 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3993 segment addresses reported by the target,
3994 store the appropriate offsets for each section in OFFSETS.
3996 If there are fewer entries in SEGMENT_BASES than there are segments
3997 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3999 If there are more, then verify that all the excess addresses are
4000 the same as the last legitimate one, and then ignore them. This
4001 allows "TextSeg=X;DataSeg=X" qOffset replies for files which have
4002 only a single segment. */
4004 symfile_map_offsets_to_segments (bfd
*abfd
, struct symfile_segment_data
*data
,
4005 struct section_offsets
*offsets
,
4006 int num_segment_bases
,
4007 const CORE_ADDR
*segment_bases
)
4012 /* It doesn't make sense to call this function unless you have some
4013 segment base addresses. */
4014 gdb_assert (segment_bases
> 0);
4016 /* If we do not have segment mappings for the object file, we
4017 can not relocate it by segments. */
4018 gdb_assert (data
!= NULL
);
4019 gdb_assert (data
->num_segments
> 0);
4021 /* Check any extra SEGMENT_BASES entries. */
4022 if (num_segment_bases
> data
->num_segments
)
4023 for (i
= data
->num_segments
; i
< num_segment_bases
; i
++)
4024 if (segment_bases
[i
] != segment_bases
[data
->num_segments
- 1])
4027 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
4029 int which
= data
->segment_info
[i
];
4031 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
4033 /* Don't bother computing offsets for sections that aren't
4034 loaded as part of any segment. */
4038 /* Use the last SEGMENT_BASES entry as the address of any extra
4039 segments mentioned in DATA->segment_info. */
4040 if (which
> num_segment_bases
)
4041 which
= num_segment_bases
;
4043 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
4044 - data
->segment_bases
[which
- 1]);
4051 symfile_find_segment_sections (struct objfile
*objfile
)
4053 bfd
*abfd
= objfile
->obfd
;
4056 struct symfile_segment_data
*data
;
4058 data
= get_symfile_segment_data (objfile
->obfd
);
4062 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
4064 free_symfile_segment_data (data
);
4068 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
4071 int which
= data
->segment_info
[i
];
4075 if (objfile
->sect_index_text
== -1)
4076 objfile
->sect_index_text
= sect
->index
;
4078 if (objfile
->sect_index_rodata
== -1)
4079 objfile
->sect_index_rodata
= sect
->index
;
4081 else if (which
== 2)
4083 if (objfile
->sect_index_data
== -1)
4084 objfile
->sect_index_data
= sect
->index
;
4086 if (objfile
->sect_index_bss
== -1)
4087 objfile
->sect_index_bss
= sect
->index
;
4091 free_symfile_segment_data (data
);
4095 _initialize_symfile (void)
4097 struct cmd_list_element
*c
;
4099 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
4100 Load symbol table from executable file FILE.\n\
4101 The `file' command can also load symbol tables, as well as setting the file\n\
4102 to execute."), &cmdlist
);
4103 set_cmd_completer (c
, filename_completer
);
4105 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
4106 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
4107 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
4108 ADDR is the starting address of the file's text.\n\
4109 The optional arguments are section-name section-address pairs and\n\
4110 should be specified if the data and bss segments are not contiguous\n\
4111 with the text. SECT is a section name to be loaded at SECT_ADDR."),
4113 set_cmd_completer (c
, filename_completer
);
4115 c
= add_cmd ("add-shared-symbol-files", class_files
,
4116 add_shared_symbol_files_command
, _("\
4117 Load the symbols from shared objects in the dynamic linker's link map."),
4119 c
= add_alias_cmd ("assf", "add-shared-symbol-files", class_files
, 1,
4122 c
= add_cmd ("load", class_files
, load_command
, _("\
4123 Dynamically load FILE into the running program, and record its symbols\n\
4124 for access from GDB.\n\
4125 A load OFFSET may also be given."), &cmdlist
);
4126 set_cmd_completer (c
, filename_completer
);
4128 add_setshow_boolean_cmd ("symbol-reloading", class_support
,
4129 &symbol_reloading
, _("\
4130 Set dynamic symbol table reloading multiple times in one run."), _("\
4131 Show dynamic symbol table reloading multiple times in one run."), NULL
,
4133 show_symbol_reloading
,
4134 &setlist
, &showlist
);
4136 add_prefix_cmd ("overlay", class_support
, overlay_command
,
4137 _("Commands for debugging overlays."), &overlaylist
,
4138 "overlay ", 0, &cmdlist
);
4140 add_com_alias ("ovly", "overlay", class_alias
, 1);
4141 add_com_alias ("ov", "overlay", class_alias
, 1);
4143 add_cmd ("map-overlay", class_support
, map_overlay_command
,
4144 _("Assert that an overlay section is mapped."), &overlaylist
);
4146 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
4147 _("Assert that an overlay section is unmapped."), &overlaylist
);
4149 add_cmd ("list-overlays", class_support
, list_overlays_command
,
4150 _("List mappings of overlay sections."), &overlaylist
);
4152 add_cmd ("manual", class_support
, overlay_manual_command
,
4153 _("Enable overlay debugging."), &overlaylist
);
4154 add_cmd ("off", class_support
, overlay_off_command
,
4155 _("Disable overlay debugging."), &overlaylist
);
4156 add_cmd ("auto", class_support
, overlay_auto_command
,
4157 _("Enable automatic overlay debugging."), &overlaylist
);
4158 add_cmd ("load-target", class_support
, overlay_load_command
,
4159 _("Read the overlay mapping state from the target."), &overlaylist
);
4161 /* Filename extension to source language lookup table: */
4162 init_filename_language_table ();
4163 add_setshow_string_noescape_cmd ("extension-language", class_files
,
4165 Set mapping between filename extension and source language."), _("\
4166 Show mapping between filename extension and source language."), _("\
4167 Usage: set extension-language .foo bar"),
4168 set_ext_lang_command
,
4170 &setlist
, &showlist
);
4172 add_info ("extensions", info_ext_lang_command
,
4173 _("All filename extensions associated with a source language."));
4175 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
4176 &debug_file_directory
, _("\
4177 Set the directory where separate debug symbols are searched for."), _("\
4178 Show the directory where separate debug symbols are searched for."), _("\
4179 Separate debug symbols are first searched for in the same\n\
4180 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
4181 and lastly at the path of the directory of the binary with\n\
4182 the global debug-file directory prepended."),
4184 show_debug_file_directory
,
4185 &setlist
, &showlist
);