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
);
540 /* Parse the user's idea of an offset for dynamic linking, into our idea
541 of how to represent it for fast symbol reading. This is the default
542 version of the sym_fns.sym_offsets function for symbol readers that
543 don't need to do anything special. It allocates a section_offsets table
544 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
547 default_symfile_offsets (struct objfile
*objfile
,
548 struct section_addr_info
*addrs
)
552 objfile
->num_sections
= bfd_count_sections (objfile
->obfd
);
553 objfile
->section_offsets
= (struct section_offsets
*)
554 obstack_alloc (&objfile
->objfile_obstack
,
555 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
556 memset (objfile
->section_offsets
, 0,
557 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
559 /* Now calculate offsets for section that were specified by the
561 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
563 struct other_sections
*osp
;
565 osp
= &addrs
->other
[i
] ;
569 /* Record all sections in offsets */
570 /* The section_offsets in the objfile are here filled in using
572 (objfile
->section_offsets
)->offsets
[osp
->sectindex
] = osp
->addr
;
575 /* For relocatable files, all loadable sections will start at zero.
576 The zero is meaningless, so try to pick arbitrary addresses such
577 that no loadable sections overlap. This algorithm is quadratic,
578 but the number of sections in a single object file is generally
580 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
582 struct place_section_arg arg
;
583 bfd
*abfd
= objfile
->obfd
;
585 CORE_ADDR lowest
= 0;
587 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
588 /* We do not expect this to happen; just skip this step if the
589 relocatable file has a section with an assigned VMA. */
590 if (bfd_section_vma (abfd
, cur_sec
) != 0)
595 CORE_ADDR
*offsets
= objfile
->section_offsets
->offsets
;
597 /* Pick non-overlapping offsets for sections the user did not
599 arg
.offsets
= objfile
->section_offsets
;
601 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
603 /* Correctly filling in the section offsets is not quite
604 enough. Relocatable files have two properties that
605 (most) shared objects do not:
607 - Their debug information will contain relocations. Some
608 shared libraries do also, but many do not, so this can not
611 - If there are multiple code sections they will be loaded
612 at different relative addresses in memory than they are
613 in the objfile, since all sections in the file will start
616 Because GDB has very limited ability to map from an
617 address in debug info to the correct code section,
618 it relies on adding SECT_OFF_TEXT to things which might be
619 code. If we clear all the section offsets, and set the
620 section VMAs instead, then symfile_relocate_debug_section
621 will return meaningful debug information pointing at the
624 GDB has too many different data structures for section
625 addresses - a bfd, objfile, and so_list all have section
626 tables, as does exec_ops. Some of these could probably
629 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
630 cur_sec
= cur_sec
->next
)
632 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
635 bfd_set_section_vma (abfd
, cur_sec
, offsets
[cur_sec
->index
]);
636 exec_set_section_address (bfd_get_filename (abfd
), cur_sec
->index
,
637 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
)
825 warning (_("no loadable sections found in added symbol-file %s"),
830 lower_offset
= bfd_section_vma (objfile
->obfd
, lower_sect
);
832 /* Calculate offsets for the loadable sections.
833 FIXME! Sections must be in order of increasing loadable section
834 so that contiguous sections can use the lower-offset!!!
836 Adjust offsets if the segments are not contiguous.
837 If the section is contiguous, its offset should be set to
838 the offset of the highest loadable section lower than it
839 (the loadable section directly below it in memory).
840 this_offset = lower_offset = lower_addr - lower_orig_addr */
842 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
844 if (addrs
->other
[i
].addr
!= 0)
846 sect
= bfd_get_section_by_name (objfile
->obfd
,
847 addrs
->other
[i
].name
);
851 -= bfd_section_vma (objfile
->obfd
, sect
);
852 lower_offset
= addrs
->other
[i
].addr
;
853 /* This is the index used by BFD. */
854 addrs
->other
[i
].sectindex
= sect
->index
;
858 warning (_("section %s not found in %s"),
859 addrs
->other
[i
].name
,
861 addrs
->other
[i
].addr
= 0;
865 addrs
->other
[i
].addr
= lower_offset
;
869 /* Initialize symbol reading routines for this objfile, allow complaints to
870 appear for this new file, and record how verbose to be, then do the
871 initial symbol reading for this file. */
873 (*objfile
->sf
->sym_init
) (objfile
);
874 clear_complaints (&symfile_complaints
, 1, verbo
);
877 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
880 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_offsets
);
882 /* Just copy in the offset table directly as given to us. */
883 objfile
->num_sections
= num_offsets
;
884 objfile
->section_offsets
885 = ((struct section_offsets
*)
886 obstack_alloc (&objfile
->objfile_obstack
, size
));
887 memcpy (objfile
->section_offsets
, offsets
, size
);
889 init_objfile_sect_indices (objfile
);
892 #ifndef DEPRECATED_IBM6000_TARGET
893 /* This is a SVR4/SunOS specific hack, I think. In any event, it
894 screws RS/6000. sym_offsets should be doing this sort of thing,
895 because it knows the mapping between bfd sections and
897 /* This is a hack. As far as I can tell, section offsets are not
898 target dependent. They are all set to addr with a couple of
899 exceptions. The exceptions are sysvr4 shared libraries, whose
900 offsets are kept in solib structures anyway and rs6000 xcoff
901 which handles shared libraries in a completely unique way.
903 Section offsets are built similarly, except that they are built
904 by adding addr in all cases because there is no clear mapping
905 from section_offsets into actual sections. Note that solib.c
906 has a different algorithm for finding section offsets.
908 These should probably all be collapsed into some target
909 independent form of shared library support. FIXME. */
913 struct obj_section
*s
;
915 /* Map section offsets in "addr" back to the object's
916 sections by comparing the section names with bfd's
917 section names. Then adjust the section address by
918 the offset. */ /* for gdb/13815 */
920 ALL_OBJFILE_OSECTIONS (objfile
, s
)
922 CORE_ADDR s_addr
= 0;
926 !s_addr
&& i
< addrs
->num_sections
&& addrs
->other
[i
].name
;
928 if (strcmp (bfd_section_name (s
->objfile
->obfd
,
930 addrs
->other
[i
].name
) == 0)
931 s_addr
= addrs
->other
[i
].addr
; /* end added for gdb/13815 */
933 s
->addr
-= s
->offset
;
935 s
->endaddr
-= s
->offset
;
936 s
->endaddr
+= s_addr
;
940 #endif /* not DEPRECATED_IBM6000_TARGET */
942 (*objfile
->sf
->sym_read
) (objfile
, mainline
);
944 /* Don't allow char * to have a typename (else would get caddr_t).
945 Ditto void *. FIXME: Check whether this is now done by all the
946 symbol readers themselves (many of them now do), and if so remove
949 TYPE_NAME (lookup_pointer_type (builtin_type_char
)) = 0;
950 TYPE_NAME (lookup_pointer_type (builtin_type_void
)) = 0;
952 /* Mark the objfile has having had initial symbol read attempted. Note
953 that this does not mean we found any symbols... */
955 objfile
->flags
|= OBJF_SYMS
;
957 /* Discard cleanups as symbol reading was successful. */
959 discard_cleanups (old_chain
);
962 /* Perform required actions after either reading in the initial
963 symbols for a new objfile, or mapping in the symbols from a reusable
967 new_symfile_objfile (struct objfile
*objfile
, int mainline
, int verbo
)
970 /* If this is the main symbol file we have to clean up all users of the
971 old main symbol file. Otherwise it is sufficient to fixup all the
972 breakpoints that may have been redefined by this symbol file. */
975 /* OK, make it the "real" symbol file. */
976 symfile_objfile
= objfile
;
978 clear_symtab_users ();
982 breakpoint_re_set ();
985 /* We're done reading the symbol file; finish off complaints. */
986 clear_complaints (&symfile_complaints
, 0, verbo
);
989 /* Process a symbol file, as either the main file or as a dynamically
992 ABFD is a BFD already open on the file, as from symfile_bfd_open.
993 This BFD will be closed on error, and is always consumed by this function.
995 FROM_TTY says how verbose to be.
997 MAINLINE specifies whether this is the main symbol file, or whether
998 it's an extra symbol file such as dynamically loaded code.
1000 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
1001 syms_from_objfile, above. ADDRS is ignored when MAINLINE is
1004 Upon success, returns a pointer to the objfile that was added.
1005 Upon failure, jumps back to command level (never returns). */
1006 static struct objfile
*
1007 symbol_file_add_with_addrs_or_offsets (bfd
*abfd
, int from_tty
,
1008 struct section_addr_info
*addrs
,
1009 struct section_offsets
*offsets
,
1011 int mainline
, int flags
)
1013 struct objfile
*objfile
;
1014 struct partial_symtab
*psymtab
;
1015 char *debugfile
= NULL
;
1016 struct section_addr_info
*orig_addrs
= NULL
;
1017 struct cleanup
*my_cleanups
;
1018 const char *name
= bfd_get_filename (abfd
);
1020 my_cleanups
= make_cleanup_bfd_close (abfd
);
1022 /* Give user a chance to burp if we'd be
1023 interactively wiping out any existing symbols. */
1025 if ((have_full_symbols () || have_partial_symbols ())
1028 && !query ("Load new symbol table from \"%s\"? ", name
))
1029 error (_("Not confirmed."));
1031 objfile
= allocate_objfile (abfd
, flags
);
1032 discard_cleanups (my_cleanups
);
1036 orig_addrs
= copy_section_addr_info (addrs
);
1037 make_cleanup_free_section_addr_info (orig_addrs
);
1040 /* We either created a new mapped symbol table, mapped an existing
1041 symbol table file which has not had initial symbol reading
1042 performed, or need to read an unmapped symbol table. */
1043 if (from_tty
|| info_verbose
)
1045 if (deprecated_pre_add_symbol_hook
)
1046 deprecated_pre_add_symbol_hook (name
);
1049 printf_unfiltered (_("Reading symbols from %s..."), name
);
1051 gdb_flush (gdb_stdout
);
1054 syms_from_objfile (objfile
, addrs
, offsets
, num_offsets
,
1055 mainline
, from_tty
);
1057 /* We now have at least a partial symbol table. Check to see if the
1058 user requested that all symbols be read on initial access via either
1059 the gdb startup command line or on a per symbol file basis. Expand
1060 all partial symbol tables for this objfile if so. */
1062 if ((flags
& OBJF_READNOW
) || readnow_symbol_files
)
1064 if (from_tty
|| info_verbose
)
1066 printf_unfiltered (_("expanding to full symbols..."));
1068 gdb_flush (gdb_stdout
);
1071 for (psymtab
= objfile
->psymtabs
;
1073 psymtab
= psymtab
->next
)
1075 psymtab_to_symtab (psymtab
);
1079 /* If the file has its own symbol tables it has no separate debug info.
1080 `.dynsym'/`.symtab' go to MSYMBOLS, `.debug_info' goes to SYMTABS/PSYMTABS.
1081 `.gnu_debuglink' may no longer be present with `.note.gnu.build-id'. */
1082 if (objfile
->psymtabs
== NULL
)
1083 debugfile
= find_separate_debug_file (objfile
);
1088 objfile
->separate_debug_objfile
1089 = symbol_file_add (debugfile
, from_tty
, orig_addrs
, 0, flags
);
1093 objfile
->separate_debug_objfile
1094 = symbol_file_add (debugfile
, from_tty
, NULL
, 0, flags
);
1096 objfile
->separate_debug_objfile
->separate_debug_objfile_backlink
1099 /* Put the separate debug object before the normal one, this is so that
1100 usage of the ALL_OBJFILES_SAFE macro will stay safe. */
1101 put_objfile_before (objfile
->separate_debug_objfile
, objfile
);
1106 if (!have_partial_symbols () && !have_full_symbols ())
1109 printf_filtered (_("(no debugging symbols found)"));
1110 if (from_tty
|| info_verbose
)
1111 printf_filtered ("...");
1113 printf_filtered ("\n");
1117 if (from_tty
|| info_verbose
)
1119 if (deprecated_post_add_symbol_hook
)
1120 deprecated_post_add_symbol_hook ();
1123 printf_unfiltered (_("done.\n"));
1127 /* We print some messages regardless of whether 'from_tty ||
1128 info_verbose' is true, so make sure they go out at the right
1130 gdb_flush (gdb_stdout
);
1132 do_cleanups (my_cleanups
);
1134 if (objfile
->sf
== NULL
)
1135 return objfile
; /* No symbols. */
1137 new_symfile_objfile (objfile
, mainline
, from_tty
);
1139 observer_notify_new_objfile (objfile
);
1141 bfd_cache_close_all ();
1146 /* Process the symbol file ABFD, as either the main file or as a
1147 dynamically loaded file.
1149 See symbol_file_add_with_addrs_or_offsets's comments for
1152 symbol_file_add_from_bfd (bfd
*abfd
, int from_tty
,
1153 struct section_addr_info
*addrs
,
1154 int mainline
, int flags
)
1156 return symbol_file_add_with_addrs_or_offsets (abfd
,
1157 from_tty
, addrs
, 0, 0,
1162 /* Process a symbol file, as either the main file or as a dynamically
1163 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
1166 symbol_file_add (char *name
, int from_tty
, struct section_addr_info
*addrs
,
1167 int mainline
, int flags
)
1169 return symbol_file_add_from_bfd (symfile_bfd_open (name
), from_tty
,
1170 addrs
, mainline
, flags
);
1174 /* Call symbol_file_add() with default values and update whatever is
1175 affected by the loading of a new main().
1176 Used when the file is supplied in the gdb command line
1177 and by some targets with special loading requirements.
1178 The auxiliary function, symbol_file_add_main_1(), has the flags
1179 argument for the switches that can only be specified in the symbol_file
1183 symbol_file_add_main (char *args
, int from_tty
)
1185 symbol_file_add_main_1 (args
, from_tty
, 0);
1189 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
1191 symbol_file_add (args
, from_tty
, NULL
, 1, flags
);
1193 /* Getting new symbols may change our opinion about
1194 what is frameless. */
1195 reinit_frame_cache ();
1197 set_initial_language ();
1201 symbol_file_clear (int from_tty
)
1203 if ((have_full_symbols () || have_partial_symbols ())
1206 ? !query (_("Discard symbol table from `%s'? "),
1207 symfile_objfile
->name
)
1208 : !query (_("Discard symbol table? "))))
1209 error (_("Not confirmed."));
1210 free_all_objfiles ();
1212 /* solib descriptors may have handles to objfiles. Since their
1213 storage has just been released, we'd better wipe the solib
1214 descriptors as well.
1216 no_shared_libraries (NULL
, from_tty
);
1218 symfile_objfile
= NULL
;
1220 printf_unfiltered (_("No symbol file now.\n"));
1229 /* Locate NT_GNU_BUILD_ID from ABFD and return its content. */
1231 static struct build_id
*
1232 build_id_bfd_get (bfd
*abfd
)
1234 struct build_id
*retval
;
1236 if (!bfd_check_format (abfd
, bfd_object
)
1237 || bfd_get_flavour (abfd
) != bfd_target_elf_flavour
1238 || elf_tdata (abfd
)->build_id
== NULL
)
1241 retval
= xmalloc (sizeof *retval
- 1 + elf_tdata (abfd
)->build_id_size
);
1242 retval
->size
= elf_tdata (abfd
)->build_id_size
;
1243 memcpy (retval
->data
, elf_tdata (abfd
)->build_id
, retval
->size
);
1248 /* Return if FILENAME has NT_GNU_BUILD_ID matching the CHECK value. */
1251 build_id_verify (const char *filename
, struct build_id
*check
)
1254 struct build_id
*found
= NULL
;
1257 /* We expect to be silent on the non-existing files. */
1258 abfd
= bfd_openr (filename
, gnutarget
);
1262 found
= build_id_bfd_get (abfd
);
1265 warning (_("File \"%s\" has no build-id, file skipped"), filename
);
1266 else if (found
->size
!= check
->size
1267 || memcmp (found
->data
, check
->data
, found
->size
) != 0)
1268 warning (_("File \"%s\" has a different build-id, file skipped"), filename
);
1272 if (!bfd_close (abfd
))
1273 warning (_("cannot close \"%s\": %s"), filename
,
1274 bfd_errmsg (bfd_get_error ()));
1279 build_id_to_debug_filename (struct build_id
*build_id
)
1281 char *link
, *s
, *retval
= NULL
;
1282 gdb_byte
*data
= build_id
->data
;
1283 size_t size
= build_id
->size
;
1285 /* DEBUG_FILE_DIRECTORY/.build-id/ab/cdef */
1286 link
= xmalloc (strlen (debug_file_directory
) + (sizeof "/.build-id/" - 1) + 1
1287 + 2 * size
+ (sizeof ".debug" - 1) + 1);
1288 s
= link
+ sprintf (link
, "%s/.build-id/", debug_file_directory
);
1292 s
+= sprintf (s
, "%02x", (unsigned) *data
++);
1297 s
+= sprintf (s
, "%02x", (unsigned) *data
++);
1298 strcpy (s
, ".debug");
1300 /* lrealpath() is expensive even for the usually non-existent files. */
1301 if (access (link
, F_OK
) == 0)
1302 retval
= lrealpath (link
);
1305 if (retval
!= NULL
&& !build_id_verify (retval
, build_id
))
1315 get_debug_link_info (struct objfile
*objfile
, unsigned long *crc32_out
)
1318 bfd_size_type debuglink_size
;
1319 unsigned long crc32
;
1324 sect
= bfd_get_section_by_name (objfile
->obfd
, ".gnu_debuglink");
1329 debuglink_size
= bfd_section_size (objfile
->obfd
, sect
);
1331 contents
= xmalloc (debuglink_size
);
1332 bfd_get_section_contents (objfile
->obfd
, sect
, contents
,
1333 (file_ptr
)0, (bfd_size_type
)debuglink_size
);
1335 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1336 crc_offset
= strlen (contents
) + 1;
1337 crc_offset
= (crc_offset
+ 3) & ~3;
1339 crc32
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) (contents
+ crc_offset
));
1346 separate_debug_file_exists (const char *name
, unsigned long crc
)
1348 unsigned long file_crc
= 0;
1350 gdb_byte buffer
[8*1024];
1353 fd
= open (name
, O_RDONLY
| O_BINARY
);
1357 while ((count
= read (fd
, buffer
, sizeof (buffer
))) > 0)
1358 file_crc
= gnu_debuglink_crc32 (file_crc
, buffer
, count
);
1362 return crc
== file_crc
;
1365 char *debug_file_directory
= NULL
;
1367 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1368 struct cmd_list_element
*c
, const char *value
)
1370 fprintf_filtered (file
, _("\
1371 The directory where separate debug symbols are searched for is \"%s\".\n"),
1375 #if ! defined (DEBUG_SUBDIRECTORY)
1376 #define DEBUG_SUBDIRECTORY ".debug"
1380 find_separate_debug_file (struct objfile
*objfile
)
1388 bfd_size_type debuglink_size
;
1389 unsigned long crc32
;
1391 struct build_id
*build_id
;
1393 build_id
= build_id_bfd_get (objfile
->obfd
);
1394 if (build_id
!= NULL
)
1396 char *build_id_name
;
1398 build_id_name
= build_id_to_debug_filename (build_id
);
1400 /* Prevent looping on a stripped .debug file. */
1401 if (build_id_name
!= NULL
&& strcmp (build_id_name
, objfile
->name
) == 0)
1403 warning (_("\"%s\": separate debug info file has no debug info"),
1405 xfree (build_id_name
);
1407 else if (build_id_name
!= NULL
)
1408 return build_id_name
;
1411 basename
= get_debug_link_info (objfile
, &crc32
);
1413 if (basename
== NULL
)
1416 dir
= xstrdup (objfile
->name
);
1418 /* Strip off the final filename part, leaving the directory name,
1419 followed by a slash. Objfile names should always be absolute and
1420 tilde-expanded, so there should always be a slash in there
1422 for (i
= strlen(dir
) - 1; i
>= 0; i
--)
1424 if (IS_DIR_SEPARATOR (dir
[i
]))
1427 gdb_assert (i
>= 0 && IS_DIR_SEPARATOR (dir
[i
]));
1430 debugfile
= alloca (strlen (debug_file_directory
) + 1
1432 + strlen (DEBUG_SUBDIRECTORY
)
1437 /* First try in the same directory as the original file. */
1438 strcpy (debugfile
, dir
);
1439 strcat (debugfile
, basename
);
1441 if (separate_debug_file_exists (debugfile
, crc32
))
1445 return xstrdup (debugfile
);
1448 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1449 strcpy (debugfile
, dir
);
1450 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1451 strcat (debugfile
, "/");
1452 strcat (debugfile
, basename
);
1454 if (separate_debug_file_exists (debugfile
, crc32
))
1458 return xstrdup (debugfile
);
1461 /* Then try in the global debugfile directory. */
1462 strcpy (debugfile
, debug_file_directory
);
1463 strcat (debugfile
, "/");
1464 strcat (debugfile
, dir
);
1465 strcat (debugfile
, basename
);
1467 if (separate_debug_file_exists (debugfile
, crc32
))
1471 return xstrdup (debugfile
);
1474 /* If the file is in the sysroot, try using its base path in the
1475 global debugfile directory. */
1476 canon_name
= lrealpath (dir
);
1478 && strncmp (canon_name
, gdb_sysroot
, strlen (gdb_sysroot
)) == 0
1479 && IS_DIR_SEPARATOR (canon_name
[strlen (gdb_sysroot
)]))
1481 strcpy (debugfile
, debug_file_directory
);
1482 strcat (debugfile
, canon_name
+ strlen (gdb_sysroot
));
1483 strcat (debugfile
, "/");
1484 strcat (debugfile
, basename
);
1486 if (separate_debug_file_exists (debugfile
, crc32
))
1491 return xstrdup (debugfile
);
1504 /* This is the symbol-file command. Read the file, analyze its
1505 symbols, and add a struct symtab to a symtab list. The syntax of
1506 the command is rather bizarre:
1508 1. The function buildargv implements various quoting conventions
1509 which are undocumented and have little or nothing in common with
1510 the way things are quoted (or not quoted) elsewhere in GDB.
1512 2. Options are used, which are not generally used in GDB (perhaps
1513 "set mapped on", "set readnow on" would be better)
1515 3. The order of options matters, which is contrary to GNU
1516 conventions (because it is confusing and inconvenient). */
1519 symbol_file_command (char *args
, int from_tty
)
1525 symbol_file_clear (from_tty
);
1529 char **argv
= buildargv (args
);
1530 int flags
= OBJF_USERLOADED
;
1531 struct cleanup
*cleanups
;
1537 cleanups
= make_cleanup_freeargv (argv
);
1538 while (*argv
!= NULL
)
1540 if (strcmp (*argv
, "-readnow") == 0)
1541 flags
|= OBJF_READNOW
;
1542 else if (**argv
== '-')
1543 error (_("unknown option `%s'"), *argv
);
1546 symbol_file_add_main_1 (*argv
, from_tty
, flags
);
1554 error (_("no symbol file name was specified"));
1556 do_cleanups (cleanups
);
1560 /* Set the initial language.
1562 FIXME: A better solution would be to record the language in the
1563 psymtab when reading partial symbols, and then use it (if known) to
1564 set the language. This would be a win for formats that encode the
1565 language in an easily discoverable place, such as DWARF. For
1566 stabs, we can jump through hoops looking for specially named
1567 symbols or try to intuit the language from the specific type of
1568 stabs we find, but we can't do that until later when we read in
1572 set_initial_language (void)
1574 struct partial_symtab
*pst
;
1575 enum language lang
= language_unknown
;
1577 pst
= find_main_psymtab ();
1580 if (pst
->filename
!= NULL
)
1581 lang
= deduce_language_from_filename (pst
->filename
);
1583 if (lang
== language_unknown
)
1585 /* Make C the default language */
1589 set_language (lang
);
1590 expected_language
= current_language
; /* Don't warn the user. */
1594 /* Open the file specified by NAME and hand it off to BFD for
1595 preliminary analysis. Return a newly initialized bfd *, which
1596 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1597 absolute). In case of trouble, error() is called. */
1600 symfile_bfd_open (char *name
)
1604 char *absolute_name
;
1606 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy. */
1608 /* Look down path for it, allocate 2nd new malloc'd copy. */
1609 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, name
,
1610 O_RDONLY
| O_BINARY
, 0, &absolute_name
);
1611 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1614 char *exename
= alloca (strlen (name
) + 5);
1615 strcat (strcpy (exename
, name
), ".exe");
1616 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, exename
,
1617 O_RDONLY
| O_BINARY
, 0, &absolute_name
);
1622 make_cleanup (xfree
, name
);
1623 perror_with_name (name
);
1626 /* Free 1st new malloc'd copy, but keep the 2nd malloc'd copy in
1627 bfd. It'll be freed in free_objfile(). */
1629 name
= absolute_name
;
1631 sym_bfd
= bfd_fopen (name
, gnutarget
, FOPEN_RB
, desc
);
1635 make_cleanup (xfree
, name
);
1636 error (_("\"%s\": can't open to read symbols: %s."), name
,
1637 bfd_errmsg (bfd_get_error ()));
1639 bfd_set_cacheable (sym_bfd
, 1);
1641 if (!bfd_check_format (sym_bfd
, bfd_object
))
1643 /* FIXME: should be checking for errors from bfd_close (for one
1644 thing, on error it does not free all the storage associated
1646 bfd_close (sym_bfd
); /* This also closes desc. */
1647 make_cleanup (xfree
, name
);
1648 error (_("\"%s\": can't read symbols: %s."), name
,
1649 bfd_errmsg (bfd_get_error ()));
1655 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1656 the section was not found. */
1659 get_section_index (struct objfile
*objfile
, char *section_name
)
1661 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1669 /* Link SF into the global symtab_fns list. Called on startup by the
1670 _initialize routine in each object file format reader, to register
1671 information about each format the the reader is prepared to
1675 add_symtab_fns (struct sym_fns
*sf
)
1677 sf
->next
= symtab_fns
;
1681 /* Initialize OBJFILE to read symbols from its associated BFD. It
1682 either returns or calls error(). The result is an initialized
1683 struct sym_fns in the objfile structure, that contains cached
1684 information about the symbol file. */
1686 static struct sym_fns
*
1687 find_sym_fns (bfd
*abfd
)
1690 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1692 if (our_flavour
== bfd_target_srec_flavour
1693 || our_flavour
== bfd_target_ihex_flavour
1694 || our_flavour
== bfd_target_tekhex_flavour
)
1695 return NULL
; /* No symbols. */
1697 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
->next
)
1698 if (our_flavour
== sf
->sym_flavour
)
1701 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1702 bfd_get_target (abfd
));
1706 /* This function runs the load command of our current target. */
1709 load_command (char *arg
, int from_tty
)
1716 parg
= arg
= get_exec_file (1);
1718 /* Count how many \ " ' tab space there are in the name. */
1719 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1727 /* We need to quote this string so buildargv can pull it apart. */
1728 char *temp
= xmalloc (strlen (arg
) + count
+ 1 );
1732 make_cleanup (xfree
, temp
);
1735 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1737 strncpy (ptemp
, prev
, parg
- prev
);
1738 ptemp
+= parg
- prev
;
1742 strcpy (ptemp
, prev
);
1748 /* The user might be reloading because the binary has changed. Take
1749 this opportunity to check. */
1750 reopen_exec_file ();
1753 target_load (arg
, from_tty
);
1755 /* After re-loading the executable, we don't really know which
1756 overlays are mapped any more. */
1757 overlay_cache_invalid
= 1;
1760 /* This version of "load" should be usable for any target. Currently
1761 it is just used for remote targets, not inftarg.c or core files,
1762 on the theory that only in that case is it useful.
1764 Avoiding xmodem and the like seems like a win (a) because we don't have
1765 to worry about finding it, and (b) On VMS, fork() is very slow and so
1766 we don't want to run a subprocess. On the other hand, I'm not sure how
1767 performance compares. */
1769 static int validate_download
= 0;
1771 /* Callback service function for generic_load (bfd_map_over_sections). */
1774 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1776 bfd_size_type
*sum
= data
;
1778 *sum
+= bfd_get_section_size (asec
);
1781 /* Opaque data for load_section_callback. */
1782 struct load_section_data
{
1783 unsigned long load_offset
;
1784 struct load_progress_data
*progress_data
;
1785 VEC(memory_write_request_s
) *requests
;
1788 /* Opaque data for load_progress. */
1789 struct load_progress_data
{
1790 /* Cumulative data. */
1791 unsigned long write_count
;
1792 unsigned long data_count
;
1793 bfd_size_type total_size
;
1796 /* Opaque data for load_progress for a single section. */
1797 struct load_progress_section_data
{
1798 struct load_progress_data
*cumulative
;
1800 /* Per-section data. */
1801 const char *section_name
;
1802 ULONGEST section_sent
;
1803 ULONGEST section_size
;
1808 /* Target write callback routine for progress reporting. */
1811 load_progress (ULONGEST bytes
, void *untyped_arg
)
1813 struct load_progress_section_data
*args
= untyped_arg
;
1814 struct load_progress_data
*totals
;
1817 /* Writing padding data. No easy way to get at the cumulative
1818 stats, so just ignore this. */
1821 totals
= args
->cumulative
;
1823 if (bytes
== 0 && args
->section_sent
== 0)
1825 /* The write is just starting. Let the user know we've started
1827 ui_out_message (uiout
, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1828 args
->section_name
, paddr_nz (args
->section_size
),
1829 paddr_nz (args
->lma
));
1833 if (validate_download
)
1835 /* Broken memories and broken monitors manifest themselves here
1836 when bring new computers to life. This doubles already slow
1838 /* NOTE: cagney/1999-10-18: A more efficient implementation
1839 might add a verify_memory() method to the target vector and
1840 then use that. remote.c could implement that method using
1841 the ``qCRC'' packet. */
1842 gdb_byte
*check
= xmalloc (bytes
);
1843 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
1845 if (target_read_memory (args
->lma
, check
, bytes
) != 0)
1846 error (_("Download verify read failed at 0x%s"),
1848 if (memcmp (args
->buffer
, check
, bytes
) != 0)
1849 error (_("Download verify compare failed at 0x%s"),
1851 do_cleanups (verify_cleanups
);
1853 totals
->data_count
+= bytes
;
1855 args
->buffer
+= bytes
;
1856 totals
->write_count
+= 1;
1857 args
->section_sent
+= bytes
;
1859 || (deprecated_ui_load_progress_hook
!= NULL
1860 && deprecated_ui_load_progress_hook (args
->section_name
,
1861 args
->section_sent
)))
1862 error (_("Canceled the download"));
1864 if (deprecated_show_load_progress
!= NULL
)
1865 deprecated_show_load_progress (args
->section_name
,
1869 totals
->total_size
);
1872 /* Callback service function for generic_load (bfd_map_over_sections). */
1875 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1877 struct memory_write_request
*new_request
;
1878 struct load_section_data
*args
= data
;
1879 struct load_progress_section_data
*section_data
;
1880 bfd_size_type size
= bfd_get_section_size (asec
);
1882 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1884 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
1890 new_request
= VEC_safe_push (memory_write_request_s
,
1891 args
->requests
, NULL
);
1892 memset (new_request
, 0, sizeof (struct memory_write_request
));
1893 section_data
= xcalloc (1, sizeof (struct load_progress_section_data
));
1894 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1895 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size be in instead? */
1896 new_request
->data
= xmalloc (size
);
1897 new_request
->baton
= section_data
;
1899 buffer
= new_request
->data
;
1901 section_data
->cumulative
= args
->progress_data
;
1902 section_data
->section_name
= sect_name
;
1903 section_data
->section_size
= size
;
1904 section_data
->lma
= new_request
->begin
;
1905 section_data
->buffer
= buffer
;
1907 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1910 /* Clean up an entire memory request vector, including load
1911 data and progress records. */
1914 clear_memory_write_data (void *arg
)
1916 VEC(memory_write_request_s
) **vec_p
= arg
;
1917 VEC(memory_write_request_s
) *vec
= *vec_p
;
1919 struct memory_write_request
*mr
;
1921 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
1926 VEC_free (memory_write_request_s
, vec
);
1930 generic_load (char *args
, int from_tty
)
1933 struct timeval start_time
, end_time
;
1935 struct cleanup
*old_cleanups
= make_cleanup (null_cleanup
, 0);
1936 struct load_section_data cbdata
;
1937 struct load_progress_data total_progress
;
1942 memset (&cbdata
, 0, sizeof (cbdata
));
1943 memset (&total_progress
, 0, sizeof (total_progress
));
1944 cbdata
.progress_data
= &total_progress
;
1946 make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
1948 argv
= buildargv (args
);
1953 make_cleanup_freeargv (argv
);
1955 filename
= tilde_expand (argv
[0]);
1956 make_cleanup (xfree
, filename
);
1958 if (argv
[1] != NULL
)
1962 cbdata
.load_offset
= strtoul (argv
[1], &endptr
, 0);
1964 /* If the last word was not a valid number then
1965 treat it as a file name with spaces in. */
1966 if (argv
[1] == endptr
)
1967 error (_("Invalid download offset:%s."), argv
[1]);
1969 if (argv
[2] != NULL
)
1970 error (_("Too many parameters."));
1973 /* Open the file for loading. */
1974 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
1975 if (loadfile_bfd
== NULL
)
1977 perror_with_name (filename
);
1981 /* FIXME: should be checking for errors from bfd_close (for one thing,
1982 on error it does not free all the storage associated with the
1984 make_cleanup_bfd_close (loadfile_bfd
);
1986 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
1988 error (_("\"%s\" is not an object file: %s"), filename
,
1989 bfd_errmsg (bfd_get_error ()));
1992 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
1993 (void *) &total_progress
.total_size
);
1995 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
1997 gettimeofday (&start_time
, NULL
);
1999 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2000 load_progress
) != 0)
2001 error (_("Load failed"));
2003 gettimeofday (&end_time
, NULL
);
2005 entry
= bfd_get_start_address (loadfile_bfd
);
2006 ui_out_text (uiout
, "Start address ");
2007 ui_out_field_fmt (uiout
, "address", "0x%s", paddr_nz (entry
));
2008 ui_out_text (uiout
, ", load size ");
2009 ui_out_field_fmt (uiout
, "load-size", "%lu", total_progress
.data_count
);
2010 ui_out_text (uiout
, "\n");
2011 /* We were doing this in remote-mips.c, I suspect it is right
2012 for other targets too. */
2015 /* FIXME: are we supposed to call symbol_file_add or not? According
2016 to a comment from remote-mips.c (where a call to symbol_file_add
2017 was commented out), making the call confuses GDB if more than one
2018 file is loaded in. Some targets do (e.g., remote-vx.c) but
2019 others don't (or didn't - perhaps they have all been deleted). */
2021 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2022 total_progress
.write_count
,
2023 &start_time
, &end_time
);
2025 do_cleanups (old_cleanups
);
2028 /* Report how fast the transfer went. */
2030 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
2031 replaced by print_transfer_performance (with a very different
2032 function signature). */
2035 report_transfer_performance (unsigned long data_count
, time_t start_time
,
2038 struct timeval start
, end
;
2040 start
.tv_sec
= start_time
;
2042 end
.tv_sec
= end_time
;
2045 print_transfer_performance (gdb_stdout
, data_count
, 0, &start
, &end
);
2049 print_transfer_performance (struct ui_file
*stream
,
2050 unsigned long data_count
,
2051 unsigned long write_count
,
2052 const struct timeval
*start_time
,
2053 const struct timeval
*end_time
)
2055 ULONGEST time_count
;
2057 /* Compute the elapsed time in milliseconds, as a tradeoff between
2058 accuracy and overflow. */
2059 time_count
= (end_time
->tv_sec
- start_time
->tv_sec
) * 1000;
2060 time_count
+= (end_time
->tv_usec
- start_time
->tv_usec
) / 1000;
2062 ui_out_text (uiout
, "Transfer rate: ");
2065 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / time_count
;
2067 if (ui_out_is_mi_like_p (uiout
))
2069 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
* 8);
2070 ui_out_text (uiout
, " bits/sec");
2072 else if (rate
< 1024)
2074 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
);
2075 ui_out_text (uiout
, " bytes/sec");
2079 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
/ 1024);
2080 ui_out_text (uiout
, " KB/sec");
2085 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
2086 ui_out_text (uiout
, " bits in <1 sec");
2088 if (write_count
> 0)
2090 ui_out_text (uiout
, ", ");
2091 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
2092 ui_out_text (uiout
, " bytes/write");
2094 ui_out_text (uiout
, ".\n");
2097 /* This function allows the addition of incrementally linked object files.
2098 It does not modify any state in the target, only in the debugger. */
2099 /* Note: ezannoni 2000-04-13 This function/command used to have a
2100 special case syntax for the rombug target (Rombug is the boot
2101 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2102 rombug case, the user doesn't need to supply a text address,
2103 instead a call to target_link() (in target.c) would supply the
2104 value to use. We are now discontinuing this type of ad hoc syntax. */
2107 add_symbol_file_command (char *args
, int from_tty
)
2109 char *filename
= NULL
;
2110 int flags
= OBJF_USERLOADED
;
2112 int expecting_option
= 0;
2113 int section_index
= 0;
2117 int expecting_sec_name
= 0;
2118 int expecting_sec_addr
= 0;
2127 struct section_addr_info
*section_addrs
;
2128 struct sect_opt
*sect_opts
= NULL
;
2129 size_t num_sect_opts
= 0;
2130 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2133 sect_opts
= (struct sect_opt
*) xmalloc (num_sect_opts
2134 * sizeof (struct sect_opt
));
2139 error (_("add-symbol-file takes a file name and an address"));
2141 argv
= buildargv (args
);
2142 make_cleanup_freeargv (argv
);
2147 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2149 /* Process the argument. */
2152 /* The first argument is the file name. */
2153 filename
= tilde_expand (arg
);
2154 make_cleanup (xfree
, filename
);
2159 /* The second argument is always the text address at which
2160 to load the program. */
2161 sect_opts
[section_index
].name
= ".text";
2162 sect_opts
[section_index
].value
= arg
;
2163 if (++section_index
>= num_sect_opts
)
2166 sect_opts
= ((struct sect_opt
*)
2167 xrealloc (sect_opts
,
2169 * sizeof (struct sect_opt
)));
2174 /* It's an option (starting with '-') or it's an argument
2179 if (strcmp (arg
, "-readnow") == 0)
2180 flags
|= OBJF_READNOW
;
2181 else if (strcmp (arg
, "-s") == 0)
2183 expecting_sec_name
= 1;
2184 expecting_sec_addr
= 1;
2189 if (expecting_sec_name
)
2191 sect_opts
[section_index
].name
= arg
;
2192 expecting_sec_name
= 0;
2195 if (expecting_sec_addr
)
2197 sect_opts
[section_index
].value
= arg
;
2198 expecting_sec_addr
= 0;
2199 if (++section_index
>= num_sect_opts
)
2202 sect_opts
= ((struct sect_opt
*)
2203 xrealloc (sect_opts
,
2205 * sizeof (struct sect_opt
)));
2209 error (_("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*"));
2214 /* This command takes at least two arguments. The first one is a
2215 filename, and the second is the address where this file has been
2216 loaded. Abort now if this address hasn't been provided by the
2218 if (section_index
< 1)
2219 error (_("The address where %s has been loaded is missing"), filename
);
2221 /* Print the prompt for the query below. And save the arguments into
2222 a sect_addr_info structure to be passed around to other
2223 functions. We have to split this up into separate print
2224 statements because hex_string returns a local static
2227 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename
);
2228 section_addrs
= alloc_section_addr_info (section_index
);
2229 make_cleanup (xfree
, section_addrs
);
2230 for (i
= 0; i
< section_index
; i
++)
2233 char *val
= sect_opts
[i
].value
;
2234 char *sec
= sect_opts
[i
].name
;
2236 addr
= parse_and_eval_address (val
);
2238 /* Here we store the section offsets in the order they were
2239 entered on the command line. */
2240 section_addrs
->other
[sec_num
].name
= sec
;
2241 section_addrs
->other
[sec_num
].addr
= addr
;
2242 printf_unfiltered ("\t%s_addr = %s\n", sec
, paddress (addr
));
2245 /* The object's sections are initialized when a
2246 call is made to build_objfile_section_table (objfile).
2247 This happens in reread_symbols.
2248 At this point, we don't know what file type this is,
2249 so we can't determine what section names are valid. */
2252 if (from_tty
&& (!query ("%s", "")))
2253 error (_("Not confirmed."));
2255 symbol_file_add (filename
, from_tty
, section_addrs
, 0, flags
);
2257 /* Getting new symbols may change our opinion about what is
2259 reinit_frame_cache ();
2260 do_cleanups (my_cleanups
);
2264 add_shared_symbol_files_command (char *args
, int from_tty
)
2266 #ifdef ADD_SHARED_SYMBOL_FILES
2267 ADD_SHARED_SYMBOL_FILES (args
, from_tty
);
2269 error (_("This command is not available in this configuration of GDB."));
2273 /* Re-read symbols if a symbol-file has changed. */
2275 reread_symbols (void)
2277 struct objfile
*objfile
;
2280 struct stat new_statbuf
;
2283 /* With the addition of shared libraries, this should be modified,
2284 the load time should be saved in the partial symbol tables, since
2285 different tables may come from different source files. FIXME.
2286 This routine should then walk down each partial symbol table
2287 and see if the symbol table that it originates from has been changed */
2289 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2293 #ifdef DEPRECATED_IBM6000_TARGET
2294 /* If this object is from a shared library, then you should
2295 stat on the library name, not member name. */
2297 if (objfile
->obfd
->my_archive
)
2298 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2301 res
= stat (objfile
->name
, &new_statbuf
);
2304 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2305 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2309 new_modtime
= new_statbuf
.st_mtime
;
2310 if (new_modtime
!= objfile
->mtime
)
2312 struct cleanup
*old_cleanups
;
2313 struct section_offsets
*offsets
;
2315 char *obfd_filename
;
2317 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2320 /* There are various functions like symbol_file_add,
2321 symfile_bfd_open, syms_from_objfile, etc., which might
2322 appear to do what we want. But they have various other
2323 effects which we *don't* want. So we just do stuff
2324 ourselves. We don't worry about mapped files (for one thing,
2325 any mapped file will be out of date). */
2327 /* If we get an error, blow away this objfile (not sure if
2328 that is the correct response for things like shared
2330 old_cleanups
= make_cleanup_free_objfile (objfile
);
2331 /* We need to do this whenever any symbols go away. */
2332 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2334 if (exec_bfd
!= NULL
&& strcmp (bfd_get_filename (objfile
->obfd
),
2335 bfd_get_filename (exec_bfd
)) == 0)
2337 /* Reload EXEC_BFD without asking anything. */
2339 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2342 /* Clean up any state BFD has sitting around. We don't need
2343 to close the descriptor but BFD lacks a way of closing the
2344 BFD without closing the descriptor. */
2345 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2346 if (!bfd_close (objfile
->obfd
))
2347 error (_("Can't close BFD for %s: %s"), objfile
->name
,
2348 bfd_errmsg (bfd_get_error ()));
2349 objfile
->obfd
= bfd_openr (obfd_filename
, gnutarget
);
2350 if (objfile
->obfd
== NULL
)
2351 error (_("Can't open %s to read symbols."), objfile
->name
);
2352 /* bfd_openr sets cacheable to true, which is what we want. */
2353 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2354 error (_("Can't read symbols from %s: %s."), objfile
->name
,
2355 bfd_errmsg (bfd_get_error ()));
2357 /* Save the offsets, we will nuke them with the rest of the
2359 num_offsets
= objfile
->num_sections
;
2360 offsets
= ((struct section_offsets
*)
2361 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2362 memcpy (offsets
, objfile
->section_offsets
,
2363 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2365 /* Remove any references to this objfile in the global
2367 preserve_values (objfile
);
2369 /* Nuke all the state that we will re-read. Much of the following
2370 code which sets things to NULL really is necessary to tell
2371 other parts of GDB that there is nothing currently there. */
2373 /* FIXME: Do we have to free a whole linked list, or is this
2375 if (objfile
->global_psymbols
.list
)
2376 xfree (objfile
->global_psymbols
.list
);
2377 memset (&objfile
->global_psymbols
, 0,
2378 sizeof (objfile
->global_psymbols
));
2379 if (objfile
->static_psymbols
.list
)
2380 xfree (objfile
->static_psymbols
.list
);
2381 memset (&objfile
->static_psymbols
, 0,
2382 sizeof (objfile
->static_psymbols
));
2384 /* Free the obstacks for non-reusable objfiles */
2385 bcache_xfree (objfile
->psymbol_cache
);
2386 objfile
->psymbol_cache
= bcache_xmalloc ();
2387 bcache_xfree (objfile
->macro_cache
);
2388 objfile
->macro_cache
= bcache_xmalloc ();
2389 if (objfile
->demangled_names_hash
!= NULL
)
2391 htab_delete (objfile
->demangled_names_hash
);
2392 objfile
->demangled_names_hash
= NULL
;
2394 obstack_free (&objfile
->objfile_obstack
, 0);
2395 objfile
->sections
= NULL
;
2396 objfile
->symtabs
= NULL
;
2397 objfile
->psymtabs
= NULL
;
2398 objfile
->free_psymtabs
= NULL
;
2399 objfile
->cp_namespace_symtab
= NULL
;
2400 objfile
->msymbols
= NULL
;
2401 objfile
->deprecated_sym_private
= NULL
;
2402 objfile
->minimal_symbol_count
= 0;
2403 memset (&objfile
->msymbol_hash
, 0,
2404 sizeof (objfile
->msymbol_hash
));
2405 memset (&objfile
->msymbol_demangled_hash
, 0,
2406 sizeof (objfile
->msymbol_demangled_hash
));
2407 clear_objfile_data (objfile
);
2408 if (objfile
->sf
!= NULL
)
2410 (*objfile
->sf
->sym_finish
) (objfile
);
2413 /* We never make this a mapped file. */
2415 objfile
->psymbol_cache
= bcache_xmalloc ();
2416 objfile
->macro_cache
= bcache_xmalloc ();
2417 /* obstack_init also initializes the obstack so it is
2418 empty. We could use obstack_specify_allocation but
2419 gdb_obstack.h specifies the alloc/dealloc
2421 obstack_init (&objfile
->objfile_obstack
);
2422 if (build_objfile_section_table (objfile
))
2424 error (_("Can't find the file sections in `%s': %s"),
2425 objfile
->name
, bfd_errmsg (bfd_get_error ()));
2427 terminate_minimal_symbol_table (objfile
);
2429 /* We use the same section offsets as from last time. I'm not
2430 sure whether that is always correct for shared libraries. */
2431 objfile
->section_offsets
= (struct section_offsets
*)
2432 obstack_alloc (&objfile
->objfile_obstack
,
2433 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2434 memcpy (objfile
->section_offsets
, offsets
,
2435 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2436 objfile
->num_sections
= num_offsets
;
2438 /* What the hell is sym_new_init for, anyway? The concept of
2439 distinguishing between the main file and additional files
2440 in this way seems rather dubious. */
2441 if (objfile
== symfile_objfile
)
2443 (*objfile
->sf
->sym_new_init
) (objfile
);
2446 (*objfile
->sf
->sym_init
) (objfile
);
2447 clear_complaints (&symfile_complaints
, 1, 1);
2448 /* The "mainline" parameter is a hideous hack; I think leaving it
2449 zero is OK since dbxread.c also does what it needs to do if
2450 objfile->global_psymbols.size is 0. */
2451 (*objfile
->sf
->sym_read
) (objfile
, 0);
2452 if (!have_partial_symbols () && !have_full_symbols ())
2455 printf_unfiltered (_("(no debugging symbols found)\n"));
2458 objfile
->flags
|= OBJF_SYMS
;
2460 /* We're done reading the symbol file; finish off complaints. */
2461 clear_complaints (&symfile_complaints
, 0, 1);
2463 /* Getting new symbols may change our opinion about what is
2466 reinit_frame_cache ();
2468 /* Discard cleanups as symbol reading was successful. */
2469 discard_cleanups (old_cleanups
);
2471 /* If the mtime has changed between the time we set new_modtime
2472 and now, we *want* this to be out of date, so don't call stat
2474 objfile
->mtime
= new_modtime
;
2476 reread_separate_symbols (objfile
);
2477 init_entry_point_info (objfile
);
2484 clear_symtab_users ();
2485 /* At least one objfile has changed, so we can consider that
2486 the executable we're debugging has changed too. */
2487 observer_notify_executable_changed (NULL
);
2493 /* Handle separate debug info for OBJFILE, which has just been
2495 - If we had separate debug info before, but now we don't, get rid
2496 of the separated objfile.
2497 - If we didn't have separated debug info before, but now we do,
2498 read in the new separated debug info file.
2499 - If the debug link points to a different file, toss the old one
2500 and read the new one.
2501 This function does *not* handle the case where objfile is still
2502 using the same separate debug info file, but that file's timestamp
2503 has changed. That case should be handled by the loop in
2504 reread_symbols already. */
2506 reread_separate_symbols (struct objfile
*objfile
)
2509 unsigned long crc32
;
2511 /* Does the updated objfile's debug info live in a
2513 debug_file
= find_separate_debug_file (objfile
);
2515 if (objfile
->separate_debug_objfile
)
2517 /* There are two cases where we need to get rid of
2518 the old separated debug info objfile:
2519 - if the new primary objfile doesn't have
2520 separated debug info, or
2521 - if the new primary objfile has separate debug
2522 info, but it's under a different filename.
2524 If the old and new objfiles both have separate
2525 debug info, under the same filename, then we're
2526 okay --- if the separated file's contents have
2527 changed, we will have caught that when we
2528 visited it in this function's outermost
2531 || strcmp (debug_file
, objfile
->separate_debug_objfile
->name
) != 0)
2532 free_objfile (objfile
->separate_debug_objfile
);
2535 /* If the new objfile has separate debug info, and we
2536 haven't loaded it already, do so now. */
2538 && ! objfile
->separate_debug_objfile
)
2540 /* Use the same section offset table as objfile itself.
2541 Preserve the flags from objfile that make sense. */
2542 objfile
->separate_debug_objfile
2543 = (symbol_file_add_with_addrs_or_offsets
2544 (symfile_bfd_open (debug_file
),
2545 info_verbose
, /* from_tty: Don't override the default. */
2546 0, /* No addr table. */
2547 objfile
->section_offsets
, objfile
->num_sections
,
2548 0, /* Not mainline. See comments about this above. */
2549 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
2550 | OBJF_USERLOADED
)));
2551 objfile
->separate_debug_objfile
->separate_debug_objfile_backlink
2569 static filename_language
*filename_language_table
;
2570 static int fl_table_size
, fl_table_next
;
2573 add_filename_language (char *ext
, enum language lang
)
2575 if (fl_table_next
>= fl_table_size
)
2577 fl_table_size
+= 10;
2578 filename_language_table
=
2579 xrealloc (filename_language_table
,
2580 fl_table_size
* sizeof (*filename_language_table
));
2583 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2584 filename_language_table
[fl_table_next
].lang
= lang
;
2588 static char *ext_args
;
2590 show_ext_args (struct ui_file
*file
, int from_tty
,
2591 struct cmd_list_element
*c
, const char *value
)
2593 fprintf_filtered (file
, _("\
2594 Mapping between filename extension and source language is \"%s\".\n"),
2599 set_ext_lang_command (char *args
, int from_tty
, struct cmd_list_element
*e
)
2602 char *cp
= ext_args
;
2605 /* First arg is filename extension, starting with '.' */
2607 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2609 /* Find end of first arg. */
2610 while (*cp
&& !isspace (*cp
))
2614 error (_("'%s': two arguments required -- filename extension and language"),
2617 /* Null-terminate first arg */
2620 /* Find beginning of second arg, which should be a source language. */
2621 while (*cp
&& isspace (*cp
))
2625 error (_("'%s': two arguments required -- filename extension and language"),
2628 /* Lookup the language from among those we know. */
2629 lang
= language_enum (cp
);
2631 /* Now lookup the filename extension: do we already know it? */
2632 for (i
= 0; i
< fl_table_next
; i
++)
2633 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2636 if (i
>= fl_table_next
)
2638 /* new file extension */
2639 add_filename_language (ext_args
, lang
);
2643 /* redefining a previously known filename extension */
2646 /* query ("Really make files of type %s '%s'?", */
2647 /* ext_args, language_str (lang)); */
2649 xfree (filename_language_table
[i
].ext
);
2650 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2651 filename_language_table
[i
].lang
= lang
;
2656 info_ext_lang_command (char *args
, int from_tty
)
2660 printf_filtered (_("Filename extensions and the languages they represent:"));
2661 printf_filtered ("\n\n");
2662 for (i
= 0; i
< fl_table_next
; i
++)
2663 printf_filtered ("\t%s\t- %s\n",
2664 filename_language_table
[i
].ext
,
2665 language_str (filename_language_table
[i
].lang
));
2669 init_filename_language_table (void)
2671 if (fl_table_size
== 0) /* protect against repetition */
2675 filename_language_table
=
2676 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
2677 add_filename_language (".c", language_c
);
2678 add_filename_language (".C", language_cplus
);
2679 add_filename_language (".cc", language_cplus
);
2680 add_filename_language (".cp", language_cplus
);
2681 add_filename_language (".cpp", language_cplus
);
2682 add_filename_language (".cxx", language_cplus
);
2683 add_filename_language (".c++", language_cplus
);
2684 add_filename_language (".java", language_java
);
2685 add_filename_language (".class", language_java
);
2686 add_filename_language (".m", language_objc
);
2687 add_filename_language (".f", language_fortran
);
2688 add_filename_language (".F", language_fortran
);
2689 add_filename_language (".s", language_asm
);
2690 add_filename_language (".sx", language_asm
);
2691 add_filename_language (".S", language_asm
);
2692 add_filename_language (".pas", language_pascal
);
2693 add_filename_language (".p", language_pascal
);
2694 add_filename_language (".pp", language_pascal
);
2695 add_filename_language (".adb", language_ada
);
2696 add_filename_language (".ads", language_ada
);
2697 add_filename_language (".a", language_ada
);
2698 add_filename_language (".ada", language_ada
);
2703 deduce_language_from_filename (char *filename
)
2708 if (filename
!= NULL
)
2709 if ((cp
= strrchr (filename
, '.')) != NULL
)
2710 for (i
= 0; i
< fl_table_next
; i
++)
2711 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2712 return filename_language_table
[i
].lang
;
2714 return language_unknown
;
2719 Allocate and partly initialize a new symbol table. Return a pointer
2720 to it. error() if no space.
2722 Caller must set these fields:
2728 possibly free_named_symtabs (symtab->filename);
2732 allocate_symtab (char *filename
, struct objfile
*objfile
)
2734 struct symtab
*symtab
;
2736 symtab
= (struct symtab
*)
2737 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symtab
));
2738 memset (symtab
, 0, sizeof (*symtab
));
2739 symtab
->filename
= obsavestring (filename
, strlen (filename
),
2740 &objfile
->objfile_obstack
);
2741 symtab
->fullname
= NULL
;
2742 symtab
->language
= deduce_language_from_filename (filename
);
2743 symtab
->debugformat
= obsavestring ("unknown", 7,
2744 &objfile
->objfile_obstack
);
2746 /* Hook it to the objfile it comes from */
2748 symtab
->objfile
= objfile
;
2749 symtab
->next
= objfile
->symtabs
;
2750 objfile
->symtabs
= symtab
;
2755 struct partial_symtab
*
2756 allocate_psymtab (char *filename
, struct objfile
*objfile
)
2758 struct partial_symtab
*psymtab
;
2760 if (objfile
->free_psymtabs
)
2762 psymtab
= objfile
->free_psymtabs
;
2763 objfile
->free_psymtabs
= psymtab
->next
;
2766 psymtab
= (struct partial_symtab
*)
2767 obstack_alloc (&objfile
->objfile_obstack
,
2768 sizeof (struct partial_symtab
));
2770 memset (psymtab
, 0, sizeof (struct partial_symtab
));
2771 psymtab
->filename
= obsavestring (filename
, strlen (filename
),
2772 &objfile
->objfile_obstack
);
2773 psymtab
->symtab
= NULL
;
2775 /* Prepend it to the psymtab list for the objfile it belongs to.
2776 Psymtabs are searched in most recent inserted -> least recent
2779 psymtab
->objfile
= objfile
;
2780 psymtab
->next
= objfile
->psymtabs
;
2781 objfile
->psymtabs
= psymtab
;
2784 struct partial_symtab
**prev_pst
;
2785 psymtab
->objfile
= objfile
;
2786 psymtab
->next
= NULL
;
2787 prev_pst
= &(objfile
->psymtabs
);
2788 while ((*prev_pst
) != NULL
)
2789 prev_pst
= &((*prev_pst
)->next
);
2790 (*prev_pst
) = psymtab
;
2798 discard_psymtab (struct partial_symtab
*pst
)
2800 struct partial_symtab
**prev_pst
;
2803 Empty psymtabs happen as a result of header files which don't
2804 have any symbols in them. There can be a lot of them. But this
2805 check is wrong, in that a psymtab with N_SLINE entries but
2806 nothing else is not empty, but we don't realize that. Fixing
2807 that without slowing things down might be tricky. */
2809 /* First, snip it out of the psymtab chain */
2811 prev_pst
= &(pst
->objfile
->psymtabs
);
2812 while ((*prev_pst
) != pst
)
2813 prev_pst
= &((*prev_pst
)->next
);
2814 (*prev_pst
) = pst
->next
;
2816 /* Next, put it on a free list for recycling */
2818 pst
->next
= pst
->objfile
->free_psymtabs
;
2819 pst
->objfile
->free_psymtabs
= pst
;
2823 /* Reset all data structures in gdb which may contain references to symbol
2827 clear_symtab_users (void)
2829 /* Someday, we should do better than this, by only blowing away
2830 the things that really need to be blown. */
2832 /* Clear the "current" symtab first, because it is no longer valid.
2833 breakpoint_re_set may try to access the current symtab. */
2834 clear_current_source_symtab_and_line ();
2837 breakpoint_re_set ();
2838 set_default_breakpoint (0, 0, 0, 0);
2839 clear_pc_function_cache ();
2840 observer_notify_new_objfile (NULL
);
2842 /* Clear globals which might have pointed into a removed objfile.
2843 FIXME: It's not clear which of these are supposed to persist
2844 between expressions and which ought to be reset each time. */
2845 expression_context_block
= NULL
;
2846 innermost_block
= NULL
;
2848 /* Varobj may refer to old symbols, perform a cleanup. */
2849 varobj_invalidate ();
2854 clear_symtab_users_cleanup (void *ignore
)
2856 clear_symtab_users ();
2859 /* clear_symtab_users_once:
2861 This function is run after symbol reading, or from a cleanup.
2862 If an old symbol table was obsoleted, the old symbol table
2863 has been blown away, but the other GDB data structures that may
2864 reference it have not yet been cleared or re-directed. (The old
2865 symtab was zapped, and the cleanup queued, in free_named_symtab()
2868 This function can be queued N times as a cleanup, or called
2869 directly; it will do all the work the first time, and then will be a
2870 no-op until the next time it is queued. This works by bumping a
2871 counter at queueing time. Much later when the cleanup is run, or at
2872 the end of symbol processing (in case the cleanup is discarded), if
2873 the queued count is greater than the "done-count", we do the work
2874 and set the done-count to the queued count. If the queued count is
2875 less than or equal to the done-count, we just ignore the call. This
2876 is needed because reading a single .o file will often replace many
2877 symtabs (one per .h file, for example), and we don't want to reset
2878 the breakpoints N times in the user's face.
2880 The reason we both queue a cleanup, and call it directly after symbol
2881 reading, is because the cleanup protects us in case of errors, but is
2882 discarded if symbol reading is successful. */
2885 /* FIXME: As free_named_symtabs is currently a big noop this function
2886 is no longer needed. */
2887 static void clear_symtab_users_once (void);
2889 static int clear_symtab_users_queued
;
2890 static int clear_symtab_users_done
;
2893 clear_symtab_users_once (void)
2895 /* Enforce once-per-`do_cleanups'-semantics */
2896 if (clear_symtab_users_queued
<= clear_symtab_users_done
)
2898 clear_symtab_users_done
= clear_symtab_users_queued
;
2900 clear_symtab_users ();
2904 /* Delete the specified psymtab, and any others that reference it. */
2907 cashier_psymtab (struct partial_symtab
*pst
)
2909 struct partial_symtab
*ps
, *pprev
= NULL
;
2912 /* Find its previous psymtab in the chain */
2913 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2922 /* Unhook it from the chain. */
2923 if (ps
== pst
->objfile
->psymtabs
)
2924 pst
->objfile
->psymtabs
= ps
->next
;
2926 pprev
->next
= ps
->next
;
2928 /* FIXME, we can't conveniently deallocate the entries in the
2929 partial_symbol lists (global_psymbols/static_psymbols) that
2930 this psymtab points to. These just take up space until all
2931 the psymtabs are reclaimed. Ditto the dependencies list and
2932 filename, which are all in the objfile_obstack. */
2934 /* We need to cashier any psymtab that has this one as a dependency... */
2936 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2938 for (i
= 0; i
< ps
->number_of_dependencies
; i
++)
2940 if (ps
->dependencies
[i
] == pst
)
2942 cashier_psymtab (ps
);
2943 goto again
; /* Must restart, chain has been munged. */
2950 /* If a symtab or psymtab for filename NAME is found, free it along
2951 with any dependent breakpoints, displays, etc.
2952 Used when loading new versions of object modules with the "add-file"
2953 command. This is only called on the top-level symtab or psymtab's name;
2954 it is not called for subsidiary files such as .h files.
2956 Return value is 1 if we blew away the environment, 0 if not.
2957 FIXME. The return value appears to never be used.
2959 FIXME. I think this is not the best way to do this. We should
2960 work on being gentler to the environment while still cleaning up
2961 all stray pointers into the freed symtab. */
2964 free_named_symtabs (char *name
)
2967 /* FIXME: With the new method of each objfile having it's own
2968 psymtab list, this function needs serious rethinking. In particular,
2969 why was it ever necessary to toss psymtabs with specific compilation
2970 unit filenames, as opposed to all psymtabs from a particular symbol
2972 Well, the answer is that some systems permit reloading of particular
2973 compilation units. We want to blow away any old info about these
2974 compilation units, regardless of which objfiles they arrived in. --gnu. */
2977 struct symtab
*prev
;
2978 struct partial_symtab
*ps
;
2979 struct blockvector
*bv
;
2982 /* We only wack things if the symbol-reload switch is set. */
2983 if (!symbol_reloading
)
2986 /* Some symbol formats have trouble providing file names... */
2987 if (name
== 0 || *name
== '\0')
2990 /* Look for a psymtab with the specified name. */
2993 for (ps
= partial_symtab_list
; ps
; ps
= ps
->next
)
2995 if (strcmp (name
, ps
->filename
) == 0)
2997 cashier_psymtab (ps
); /* Blow it away...and its little dog, too. */
2998 goto again2
; /* Must restart, chain has been munged */
3002 /* Look for a symtab with the specified name. */
3004 for (s
= symtab_list
; s
; s
= s
->next
)
3006 if (strcmp (name
, s
->filename
) == 0)
3013 if (s
== symtab_list
)
3014 symtab_list
= s
->next
;
3016 prev
->next
= s
->next
;
3018 /* For now, queue a delete for all breakpoints, displays, etc., whether
3019 or not they depend on the symtab being freed. This should be
3020 changed so that only those data structures affected are deleted. */
3022 /* But don't delete anything if the symtab is empty.
3023 This test is necessary due to a bug in "dbxread.c" that
3024 causes empty symtabs to be created for N_SO symbols that
3025 contain the pathname of the object file. (This problem
3026 has been fixed in GDB 3.9x). */
3028 bv
= BLOCKVECTOR (s
);
3029 if (BLOCKVECTOR_NBLOCKS (bv
) > 2
3030 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
))
3031 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)))
3033 complaint (&symfile_complaints
, _("Replacing old symbols for `%s'"),
3035 clear_symtab_users_queued
++;
3036 make_cleanup (clear_symtab_users_once
, 0);
3040 complaint (&symfile_complaints
, _("Empty symbol table found for `%s'"),
3047 /* It is still possible that some breakpoints will be affected
3048 even though no symtab was found, since the file might have
3049 been compiled without debugging, and hence not be associated
3050 with a symtab. In order to handle this correctly, we would need
3051 to keep a list of text address ranges for undebuggable files.
3052 For now, we do nothing, since this is a fairly obscure case. */
3056 /* FIXME, what about the minimal symbol table? */
3063 /* Allocate and partially fill a partial symtab. It will be
3064 completely filled at the end of the symbol list.
3066 FILENAME is the name of the symbol-file we are reading from. */
3068 struct partial_symtab
*
3069 start_psymtab_common (struct objfile
*objfile
,
3070 struct section_offsets
*section_offsets
, char *filename
,
3071 CORE_ADDR textlow
, struct partial_symbol
**global_syms
,
3072 struct partial_symbol
**static_syms
)
3074 struct partial_symtab
*psymtab
;
3076 psymtab
= allocate_psymtab (filename
, objfile
);
3077 psymtab
->section_offsets
= section_offsets
;
3078 psymtab
->textlow
= textlow
;
3079 psymtab
->texthigh
= psymtab
->textlow
; /* default */
3080 psymtab
->globals_offset
= global_syms
- objfile
->global_psymbols
.list
;
3081 psymtab
->statics_offset
= static_syms
- objfile
->static_psymbols
.list
;
3085 /* Helper function, initialises partial symbol structure and stashes
3086 it into objfile's bcache. Note that our caching mechanism will
3087 use all fields of struct partial_symbol to determine hash value of the
3088 structure. In other words, having two symbols with the same name but
3089 different domain (or address) is possible and correct. */
3091 static struct partial_symbol
*
3092 add_psymbol_to_bcache (char *name
, int namelength
, domain_enum domain
,
3093 enum address_class
class,
3094 long val
, /* Value as a long */
3095 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
3096 enum language language
, struct objfile
*objfile
,
3100 /* psymbol is static so that there will be no uninitialized gaps in the
3101 structure which might contain random data, causing cache misses in
3103 static struct partial_symbol psymbol
;
3105 if (name
[namelength
] != '\0')
3107 buf
= alloca (namelength
+ 1);
3108 /* Create local copy of the partial symbol */
3109 memcpy (buf
, name
, namelength
);
3110 buf
[namelength
] = '\0';
3112 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
3115 SYMBOL_VALUE (&psymbol
) = val
;
3119 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
3121 SYMBOL_SECTION (&psymbol
) = 0;
3122 SYMBOL_LANGUAGE (&psymbol
) = language
;
3123 PSYMBOL_DOMAIN (&psymbol
) = domain
;
3124 PSYMBOL_CLASS (&psymbol
) = class;
3126 SYMBOL_SET_NAMES (&psymbol
, buf
, namelength
, objfile
);
3128 /* Stash the partial symbol away in the cache */
3129 return deprecated_bcache_added (&psymbol
, sizeof (struct partial_symbol
),
3130 objfile
->psymbol_cache
, added
);
3133 /* Helper function, adds partial symbol to the given partial symbol
3137 append_psymbol_to_list (struct psymbol_allocation_list
*list
,
3138 struct partial_symbol
*psym
,
3139 struct objfile
*objfile
)
3141 if (list
->next
>= list
->list
+ list
->size
)
3142 extend_psymbol_list (list
, objfile
);
3143 *list
->next
++ = psym
;
3144 OBJSTAT (objfile
, n_psyms
++);
3147 /* Add a symbol with a long value to a psymtab.
3148 Since one arg is a struct, we pass in a ptr and deref it (sigh).
3149 Return the partial symbol that has been added. */
3151 /* NOTE: carlton/2003-09-11: The reason why we return the partial
3152 symbol is so that callers can get access to the symbol's demangled
3153 name, which they don't have any cheap way to determine otherwise.
3154 (Currenly, dwarf2read.c is the only file who uses that information,
3155 though it's possible that other readers might in the future.)
3156 Elena wasn't thrilled about that, and I don't blame her, but we
3157 couldn't come up with a better way to get that information. If
3158 it's needed in other situations, we could consider breaking up
3159 SYMBOL_SET_NAMES to provide access to the demangled name lookup
3162 const struct partial_symbol
*
3163 add_psymbol_to_list (char *name
, int namelength
, domain_enum domain
,
3164 enum address_class
class,
3165 struct psymbol_allocation_list
*list
,
3166 long val
, /* Value as a long */
3167 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
3168 enum language language
, struct objfile
*objfile
)
3170 struct partial_symbol
*psym
;
3174 /* Stash the partial symbol away in the cache */
3175 psym
= add_psymbol_to_bcache (name
, namelength
, domain
, class,
3176 val
, coreaddr
, language
, objfile
, &added
);
3178 /* Do not duplicate global partial symbols. */
3179 if (list
== &objfile
->global_psymbols
3183 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
3184 append_psymbol_to_list (list
, psym
, objfile
);
3188 /* Initialize storage for partial symbols. */
3191 init_psymbol_list (struct objfile
*objfile
, int total_symbols
)
3193 /* Free any previously allocated psymbol lists. */
3195 if (objfile
->global_psymbols
.list
)
3197 xfree (objfile
->global_psymbols
.list
);
3199 if (objfile
->static_psymbols
.list
)
3201 xfree (objfile
->static_psymbols
.list
);
3204 /* Current best guess is that approximately a twentieth
3205 of the total symbols (in a debugging file) are global or static
3208 objfile
->global_psymbols
.size
= total_symbols
/ 10;
3209 objfile
->static_psymbols
.size
= total_symbols
/ 10;
3211 if (objfile
->global_psymbols
.size
> 0)
3213 objfile
->global_psymbols
.next
=
3214 objfile
->global_psymbols
.list
= (struct partial_symbol
**)
3215 xmalloc ((objfile
->global_psymbols
.size
3216 * sizeof (struct partial_symbol
*)));
3218 if (objfile
->static_psymbols
.size
> 0)
3220 objfile
->static_psymbols
.next
=
3221 objfile
->static_psymbols
.list
= (struct partial_symbol
**)
3222 xmalloc ((objfile
->static_psymbols
.size
3223 * sizeof (struct partial_symbol
*)));
3228 The following code implements an abstraction for debugging overlay sections.
3230 The target model is as follows:
3231 1) The gnu linker will permit multiple sections to be mapped into the
3232 same VMA, each with its own unique LMA (or load address).
3233 2) It is assumed that some runtime mechanism exists for mapping the
3234 sections, one by one, from the load address into the VMA address.
3235 3) This code provides a mechanism for gdb to keep track of which
3236 sections should be considered to be mapped from the VMA to the LMA.
3237 This information is used for symbol lookup, and memory read/write.
3238 For instance, if a section has been mapped then its contents
3239 should be read from the VMA, otherwise from the LMA.
3241 Two levels of debugger support for overlays are available. One is
3242 "manual", in which the debugger relies on the user to tell it which
3243 overlays are currently mapped. This level of support is
3244 implemented entirely in the core debugger, and the information about
3245 whether a section is mapped is kept in the objfile->obj_section table.
3247 The second level of support is "automatic", and is only available if
3248 the target-specific code provides functionality to read the target's
3249 overlay mapping table, and translate its contents for the debugger
3250 (by updating the mapped state information in the obj_section tables).
3252 The interface is as follows:
3254 overlay map <name> -- tell gdb to consider this section mapped
3255 overlay unmap <name> -- tell gdb to consider this section unmapped
3256 overlay list -- list the sections that GDB thinks are mapped
3257 overlay read-target -- get the target's state of what's mapped
3258 overlay off/manual/auto -- set overlay debugging state
3259 Functional interface:
3260 find_pc_mapped_section(pc): if the pc is in the range of a mapped
3261 section, return that section.
3262 find_pc_overlay(pc): find any overlay section that contains
3263 the pc, either in its VMA or its LMA
3264 overlay_is_mapped(sect): true if overlay is marked as mapped
3265 section_is_overlay(sect): true if section's VMA != LMA
3266 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
3267 pc_in_unmapped_range(...): true if pc belongs to section's LMA
3268 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
3269 overlay_mapped_address(...): map an address from section's LMA to VMA
3270 overlay_unmapped_address(...): map an address from section's VMA to LMA
3271 symbol_overlayed_address(...): Return a "current" address for symbol:
3272 either in VMA or LMA depending on whether
3273 the symbol's section is currently mapped
3276 /* Overlay debugging state: */
3278 enum overlay_debugging_state overlay_debugging
= ovly_off
;
3279 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
3281 /* Function: section_is_overlay (SECTION)
3282 Returns true if SECTION has VMA not equal to LMA, ie.
3283 SECTION is loaded at an address different from where it will "run". */
3286 section_is_overlay (asection
*section
)
3288 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
3290 if (overlay_debugging
)
3291 if (section
&& section
->lma
!= 0 &&
3292 section
->vma
!= section
->lma
)
3298 /* Function: overlay_invalidate_all (void)
3299 Invalidate the mapped state of all overlay sections (mark it as stale). */
3302 overlay_invalidate_all (void)
3304 struct objfile
*objfile
;
3305 struct obj_section
*sect
;
3307 ALL_OBJSECTIONS (objfile
, sect
)
3308 if (section_is_overlay (sect
->the_bfd_section
))
3309 sect
->ovly_mapped
= -1;
3312 /* Function: overlay_is_mapped (SECTION)
3313 Returns true if section is an overlay, and is currently mapped.
3314 Private: public access is thru function section_is_mapped.
3316 Access to the ovly_mapped flag is restricted to this function, so
3317 that we can do automatic update. If the global flag
3318 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
3319 overlay_invalidate_all. If the mapped state of the particular
3320 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
3323 overlay_is_mapped (struct obj_section
*osect
)
3325 if (osect
== 0 || !section_is_overlay (osect
->the_bfd_section
))
3328 switch (overlay_debugging
)
3332 return 0; /* overlay debugging off */
3333 case ovly_auto
: /* overlay debugging automatic */
3334 /* Unles there is a gdbarch_overlay_update function,
3335 there's really nothing useful to do here (can't really go auto) */
3336 if (gdbarch_overlay_update_p (current_gdbarch
))
3338 if (overlay_cache_invalid
)
3340 overlay_invalidate_all ();
3341 overlay_cache_invalid
= 0;
3343 if (osect
->ovly_mapped
== -1)
3344 gdbarch_overlay_update (current_gdbarch
, osect
);
3346 /* fall thru to manual case */
3347 case ovly_on
: /* overlay debugging manual */
3348 return osect
->ovly_mapped
== 1;
3352 /* Function: section_is_mapped
3353 Returns true if section is an overlay, and is currently mapped. */
3356 section_is_mapped (asection
*section
)
3358 struct objfile
*objfile
;
3359 struct obj_section
*osect
;
3361 if (overlay_debugging
)
3362 if (section
&& section_is_overlay (section
))
3363 ALL_OBJSECTIONS (objfile
, osect
)
3364 if (osect
->the_bfd_section
== section
)
3365 return overlay_is_mapped (osect
);
3370 /* Function: pc_in_unmapped_range
3371 If PC falls into the lma range of SECTION, return true, else false. */
3374 pc_in_unmapped_range (CORE_ADDR pc
, asection
*section
)
3376 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
3380 if (overlay_debugging
)
3381 if (section
&& section_is_overlay (section
))
3383 size
= bfd_get_section_size (section
);
3384 if (section
->lma
<= pc
&& pc
< section
->lma
+ size
)
3390 /* Function: pc_in_mapped_range
3391 If PC falls into the vma range of SECTION, return true, else false. */
3394 pc_in_mapped_range (CORE_ADDR pc
, asection
*section
)
3396 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3400 if (overlay_debugging
)
3401 if (section
&& section_is_overlay (section
))
3403 size
= bfd_get_section_size (section
);
3404 if (section
->vma
<= pc
&& pc
< section
->vma
+ size
)
3411 /* Return true if the mapped ranges of sections A and B overlap, false
3414 sections_overlap (asection
*a
, asection
*b
)
3416 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3418 CORE_ADDR a_start
= a
->vma
;
3419 CORE_ADDR a_end
= a
->vma
+ bfd_get_section_size (a
);
3420 CORE_ADDR b_start
= b
->vma
;
3421 CORE_ADDR b_end
= b
->vma
+ bfd_get_section_size (b
);
3423 return (a_start
< b_end
&& b_start
< a_end
);
3426 /* Function: overlay_unmapped_address (PC, SECTION)
3427 Returns the address corresponding to PC in the unmapped (load) range.
3428 May be the same as PC. */
3431 overlay_unmapped_address (CORE_ADDR pc
, asection
*section
)
3433 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
3435 if (overlay_debugging
)
3436 if (section
&& section_is_overlay (section
) &&
3437 pc_in_mapped_range (pc
, section
))
3438 return pc
+ section
->lma
- section
->vma
;
3443 /* Function: overlay_mapped_address (PC, SECTION)
3444 Returns the address corresponding to PC in the mapped (runtime) range.
3445 May be the same as PC. */
3448 overlay_mapped_address (CORE_ADDR pc
, asection
*section
)
3450 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3452 if (overlay_debugging
)
3453 if (section
&& section_is_overlay (section
) &&
3454 pc_in_unmapped_range (pc
, section
))
3455 return pc
+ section
->vma
- section
->lma
;
3461 /* Function: symbol_overlayed_address
3462 Return one of two addresses (relative to the VMA or to the LMA),
3463 depending on whether the section is mapped or not. */
3466 symbol_overlayed_address (CORE_ADDR address
, asection
*section
)
3468 if (overlay_debugging
)
3470 /* If the symbol has no section, just return its regular address. */
3473 /* If the symbol's section is not an overlay, just return its address */
3474 if (!section_is_overlay (section
))
3476 /* If the symbol's section is mapped, just return its address */
3477 if (section_is_mapped (section
))
3480 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3481 * then return its LOADED address rather than its vma address!!
3483 return overlay_unmapped_address (address
, section
);
3488 /* Function: find_pc_overlay (PC)
3489 Return the best-match overlay section for PC:
3490 If PC matches a mapped overlay section's VMA, return that section.
3491 Else if PC matches an unmapped section's VMA, return that section.
3492 Else if PC matches an unmapped section's LMA, return that section. */
3495 find_pc_overlay (CORE_ADDR pc
)
3497 struct objfile
*objfile
;
3498 struct obj_section
*osect
, *best_match
= NULL
;
3500 if (overlay_debugging
)
3501 ALL_OBJSECTIONS (objfile
, osect
)
3502 if (section_is_overlay (osect
->the_bfd_section
))
3504 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
))
3506 if (overlay_is_mapped (osect
))
3507 return osect
->the_bfd_section
;
3511 else if (pc_in_unmapped_range (pc
, osect
->the_bfd_section
))
3514 return best_match
? best_match
->the_bfd_section
: NULL
;
3517 /* Function: find_pc_mapped_section (PC)
3518 If PC falls into the VMA address range of an overlay section that is
3519 currently marked as MAPPED, return that section. Else return NULL. */
3522 find_pc_mapped_section (CORE_ADDR pc
)
3524 struct objfile
*objfile
;
3525 struct obj_section
*osect
;
3527 if (overlay_debugging
)
3528 ALL_OBJSECTIONS (objfile
, osect
)
3529 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
) &&
3530 overlay_is_mapped (osect
))
3531 return osect
->the_bfd_section
;
3536 /* Function: list_overlays_command
3537 Print a list of mapped sections and their PC ranges */
3540 list_overlays_command (char *args
, int from_tty
)
3543 struct objfile
*objfile
;
3544 struct obj_section
*osect
;
3546 if (overlay_debugging
)
3547 ALL_OBJSECTIONS (objfile
, osect
)
3548 if (overlay_is_mapped (osect
))
3554 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3555 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3556 size
= bfd_get_section_size (osect
->the_bfd_section
);
3557 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3559 printf_filtered ("Section %s, loaded at ", name
);
3560 fputs_filtered (paddress (lma
), gdb_stdout
);
3561 puts_filtered (" - ");
3562 fputs_filtered (paddress (lma
+ size
), gdb_stdout
);
3563 printf_filtered (", mapped at ");
3564 fputs_filtered (paddress (vma
), gdb_stdout
);
3565 puts_filtered (" - ");
3566 fputs_filtered (paddress (vma
+ size
), gdb_stdout
);
3567 puts_filtered ("\n");
3572 printf_filtered (_("No sections are mapped.\n"));
3575 /* Function: map_overlay_command
3576 Mark the named section as mapped (ie. residing at its VMA address). */
3579 map_overlay_command (char *args
, int from_tty
)
3581 struct objfile
*objfile
, *objfile2
;
3582 struct obj_section
*sec
, *sec2
;
3585 if (!overlay_debugging
)
3587 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3588 the 'overlay manual' command."));
3590 if (args
== 0 || *args
== 0)
3591 error (_("Argument required: name of an overlay section"));
3593 /* First, find a section matching the user supplied argument */
3594 ALL_OBJSECTIONS (objfile
, sec
)
3595 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3597 /* Now, check to see if the section is an overlay. */
3598 bfdsec
= sec
->the_bfd_section
;
3599 if (!section_is_overlay (bfdsec
))
3600 continue; /* not an overlay section */
3602 /* Mark the overlay as "mapped" */
3603 sec
->ovly_mapped
= 1;
3605 /* Next, make a pass and unmap any sections that are
3606 overlapped by this new section: */
3607 ALL_OBJSECTIONS (objfile2
, sec2
)
3608 if (sec2
->ovly_mapped
3610 && sec
->the_bfd_section
!= sec2
->the_bfd_section
3611 && sections_overlap (sec
->the_bfd_section
,
3612 sec2
->the_bfd_section
))
3615 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3616 bfd_section_name (objfile
->obfd
,
3617 sec2
->the_bfd_section
));
3618 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
3622 error (_("No overlay section called %s"), args
);
3625 /* Function: unmap_overlay_command
3626 Mark the overlay section as unmapped
3627 (ie. resident in its LMA address range, rather than the VMA range). */
3630 unmap_overlay_command (char *args
, int from_tty
)
3632 struct objfile
*objfile
;
3633 struct obj_section
*sec
;
3635 if (!overlay_debugging
)
3637 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3638 the 'overlay manual' command."));
3640 if (args
== 0 || *args
== 0)
3641 error (_("Argument required: name of an overlay section"));
3643 /* First, find a section matching the user supplied argument */
3644 ALL_OBJSECTIONS (objfile
, sec
)
3645 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3647 if (!sec
->ovly_mapped
)
3648 error (_("Section %s is not mapped"), args
);
3649 sec
->ovly_mapped
= 0;
3652 error (_("No overlay section called %s"), args
);
3655 /* Function: overlay_auto_command
3656 A utility command to turn on overlay debugging.
3657 Possibly this should be done via a set/show command. */
3660 overlay_auto_command (char *args
, int from_tty
)
3662 overlay_debugging
= ovly_auto
;
3663 enable_overlay_breakpoints ();
3665 printf_unfiltered (_("Automatic overlay debugging enabled."));
3668 /* Function: overlay_manual_command
3669 A utility command to turn on overlay debugging.
3670 Possibly this should be done via a set/show command. */
3673 overlay_manual_command (char *args
, int from_tty
)
3675 overlay_debugging
= ovly_on
;
3676 disable_overlay_breakpoints ();
3678 printf_unfiltered (_("Overlay debugging enabled."));
3681 /* Function: overlay_off_command
3682 A utility command to turn on overlay debugging.
3683 Possibly this should be done via a set/show command. */
3686 overlay_off_command (char *args
, int from_tty
)
3688 overlay_debugging
= ovly_off
;
3689 disable_overlay_breakpoints ();
3691 printf_unfiltered (_("Overlay debugging disabled."));
3695 overlay_load_command (char *args
, int from_tty
)
3697 if (gdbarch_overlay_update_p (current_gdbarch
))
3698 gdbarch_overlay_update (current_gdbarch
, NULL
);
3700 error (_("This target does not know how to read its overlay state."));
3703 /* Function: overlay_command
3704 A place-holder for a mis-typed command */
3706 /* Command list chain containing all defined "overlay" subcommands. */
3707 struct cmd_list_element
*overlaylist
;
3710 overlay_command (char *args
, int from_tty
)
3713 ("\"overlay\" must be followed by the name of an overlay command.\n");
3714 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3718 /* Target Overlays for the "Simplest" overlay manager:
3720 This is GDB's default target overlay layer. It works with the
3721 minimal overlay manager supplied as an example by Cygnus. The
3722 entry point is via a function pointer "gdbarch_overlay_update",
3723 so targets that use a different runtime overlay manager can
3724 substitute their own overlay_update function and take over the
3727 The overlay_update function pokes around in the target's data structures
3728 to see what overlays are mapped, and updates GDB's overlay mapping with
3731 In this simple implementation, the target data structures are as follows:
3732 unsigned _novlys; /# number of overlay sections #/
3733 unsigned _ovly_table[_novlys][4] = {
3734 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3735 {..., ..., ..., ...},
3737 unsigned _novly_regions; /# number of overlay regions #/
3738 unsigned _ovly_region_table[_novly_regions][3] = {
3739 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3742 These functions will attempt to update GDB's mappedness state in the
3743 symbol section table, based on the target's mappedness state.
3745 To do this, we keep a cached copy of the target's _ovly_table, and
3746 attempt to detect when the cached copy is invalidated. The main
3747 entry point is "simple_overlay_update(SECT), which looks up SECT in
3748 the cached table and re-reads only the entry for that section from
3749 the target (whenever possible).
3752 /* Cached, dynamically allocated copies of the target data structures: */
3753 static unsigned (*cache_ovly_table
)[4] = 0;
3755 static unsigned (*cache_ovly_region_table
)[3] = 0;
3757 static unsigned cache_novlys
= 0;
3759 static unsigned cache_novly_regions
= 0;
3761 static CORE_ADDR cache_ovly_table_base
= 0;
3763 static CORE_ADDR cache_ovly_region_table_base
= 0;
3767 VMA
, SIZE
, LMA
, MAPPED
3769 #define TARGET_LONG_BYTES (gdbarch_long_bit (current_gdbarch) \
3772 /* Throw away the cached copy of _ovly_table */
3774 simple_free_overlay_table (void)
3776 if (cache_ovly_table
)
3777 xfree (cache_ovly_table
);
3779 cache_ovly_table
= NULL
;
3780 cache_ovly_table_base
= 0;
3784 /* Throw away the cached copy of _ovly_region_table */
3786 simple_free_overlay_region_table (void)
3788 if (cache_ovly_region_table
)
3789 xfree (cache_ovly_region_table
);
3790 cache_novly_regions
= 0;
3791 cache_ovly_region_table
= NULL
;
3792 cache_ovly_region_table_base
= 0;
3796 /* Read an array of ints from the target into a local buffer.
3797 Convert to host order. int LEN is number of ints */
3799 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
, int len
)
3801 /* FIXME (alloca): Not safe if array is very large. */
3802 gdb_byte
*buf
= alloca (len
* TARGET_LONG_BYTES
);
3805 read_memory (memaddr
, buf
, len
* TARGET_LONG_BYTES
);
3806 for (i
= 0; i
< len
; i
++)
3807 myaddr
[i
] = extract_unsigned_integer (TARGET_LONG_BYTES
* i
+ buf
,
3811 /* Find and grab a copy of the target _ovly_table
3812 (and _novlys, which is needed for the table's size) */
3814 simple_read_overlay_table (void)
3816 struct minimal_symbol
*novlys_msym
, *ovly_table_msym
;
3818 simple_free_overlay_table ();
3819 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3822 error (_("Error reading inferior's overlay table: "
3823 "couldn't find `_novlys' variable\n"
3824 "in inferior. Use `overlay manual' mode."));
3828 ovly_table_msym
= lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3829 if (! ovly_table_msym
)
3831 error (_("Error reading inferior's overlay table: couldn't find "
3832 "`_ovly_table' array\n"
3833 "in inferior. Use `overlay manual' mode."));
3837 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
), 4);
3839 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3840 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3841 read_target_long_array (cache_ovly_table_base
,
3842 (unsigned int *) cache_ovly_table
,
3845 return 1; /* SUCCESS */
3849 /* Find and grab a copy of the target _ovly_region_table
3850 (and _novly_regions, which is needed for the table's size) */
3852 simple_read_overlay_region_table (void)
3854 struct minimal_symbol
*msym
;
3856 simple_free_overlay_region_table ();
3857 msym
= lookup_minimal_symbol ("_novly_regions", NULL
, NULL
);
3859 cache_novly_regions
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
3861 return 0; /* failure */
3862 cache_ovly_region_table
= (void *) xmalloc (cache_novly_regions
* 12);
3863 if (cache_ovly_region_table
!= NULL
)
3865 msym
= lookup_minimal_symbol ("_ovly_region_table", NULL
, NULL
);
3868 cache_ovly_region_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3869 read_target_long_array (cache_ovly_region_table_base
,
3870 (unsigned int *) cache_ovly_region_table
,
3871 cache_novly_regions
* 3);
3874 return 0; /* failure */
3877 return 0; /* failure */
3878 return 1; /* SUCCESS */
3882 /* Function: simple_overlay_update_1
3883 A helper function for simple_overlay_update. Assuming a cached copy
3884 of _ovly_table exists, look through it to find an entry whose vma,
3885 lma and size match those of OSECT. Re-read the entry and make sure
3886 it still matches OSECT (else the table may no longer be valid).
3887 Set OSECT's mapped state to match the entry. Return: 1 for
3888 success, 0 for failure. */
3891 simple_overlay_update_1 (struct obj_section
*osect
)
3894 bfd
*obfd
= osect
->objfile
->obfd
;
3895 asection
*bsect
= osect
->the_bfd_section
;
3897 size
= bfd_get_section_size (osect
->the_bfd_section
);
3898 for (i
= 0; i
< cache_novlys
; i
++)
3899 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3900 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3901 /* && cache_ovly_table[i][SIZE] == size */ )
3903 read_target_long_array (cache_ovly_table_base
+ i
* TARGET_LONG_BYTES
,
3904 (unsigned int *) cache_ovly_table
[i
], 4);
3905 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3906 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3907 /* && cache_ovly_table[i][SIZE] == size */ )
3909 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3912 else /* Warning! Warning! Target's ovly table has changed! */
3918 /* Function: simple_overlay_update
3919 If OSECT is NULL, then update all sections' mapped state
3920 (after re-reading the entire target _ovly_table).
3921 If OSECT is non-NULL, then try to find a matching entry in the
3922 cached ovly_table and update only OSECT's mapped state.
3923 If a cached entry can't be found or the cache isn't valid, then
3924 re-read the entire cache, and go ahead and update all sections. */
3927 simple_overlay_update (struct obj_section
*osect
)
3929 struct objfile
*objfile
;
3931 /* Were we given an osect to look up? NULL means do all of them. */
3933 /* Have we got a cached copy of the target's overlay table? */
3934 if (cache_ovly_table
!= NULL
)
3935 /* Does its cached location match what's currently in the symtab? */
3936 if (cache_ovly_table_base
==
3937 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL
, NULL
)))
3938 /* Then go ahead and try to look up this single section in the cache */
3939 if (simple_overlay_update_1 (osect
))
3940 /* Found it! We're done. */
3943 /* Cached table no good: need to read the entire table anew.
3944 Or else we want all the sections, in which case it's actually
3945 more efficient to read the whole table in one block anyway. */
3947 if (! simple_read_overlay_table ())
3950 /* Now may as well update all sections, even if only one was requested. */
3951 ALL_OBJSECTIONS (objfile
, osect
)
3952 if (section_is_overlay (osect
->the_bfd_section
))
3955 bfd
*obfd
= osect
->objfile
->obfd
;
3956 asection
*bsect
= osect
->the_bfd_section
;
3958 size
= bfd_get_section_size (bsect
);
3959 for (i
= 0; i
< cache_novlys
; i
++)
3960 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3961 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3962 /* && cache_ovly_table[i][SIZE] == size */ )
3963 { /* obj_section matches i'th entry in ovly_table */
3964 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3965 break; /* finished with inner for loop: break out */
3970 /* Set the output sections and output offsets for section SECTP in
3971 ABFD. The relocation code in BFD will read these offsets, so we
3972 need to be sure they're initialized. We map each section to itself,
3973 with no offset; this means that SECTP->vma will be honored. */
3976 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3978 sectp
->output_section
= sectp
;
3979 sectp
->output_offset
= 0;
3982 /* Relocate the contents of a debug section SECTP in ABFD. The
3983 contents are stored in BUF if it is non-NULL, or returned in a
3984 malloc'd buffer otherwise.
3986 For some platforms and debug info formats, shared libraries contain
3987 relocations against the debug sections (particularly for DWARF-2;
3988 one affected platform is PowerPC GNU/Linux, although it depends on
3989 the version of the linker in use). Also, ELF object files naturally
3990 have unresolved relocations for their debug sections. We need to apply
3991 the relocations in order to get the locations of symbols correct. */
3994 symfile_relocate_debug_section (bfd
*abfd
, asection
*sectp
, bfd_byte
*buf
)
3996 /* We're only interested in debugging sections with relocation
3998 if ((sectp
->flags
& SEC_RELOC
) == 0)
4000 if ((sectp
->flags
& SEC_DEBUGGING
) == 0)
4003 /* We will handle section offsets properly elsewhere, so relocate as if
4004 all sections begin at 0. */
4005 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
4007 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
4010 struct symfile_segment_data
*
4011 get_symfile_segment_data (bfd
*abfd
)
4013 struct sym_fns
*sf
= find_sym_fns (abfd
);
4018 return sf
->sym_segments (abfd
);
4022 free_symfile_segment_data (struct symfile_segment_data
*data
)
4024 xfree (data
->segment_bases
);
4025 xfree (data
->segment_sizes
);
4026 xfree (data
->segment_info
);
4032 - DATA, containing segment addresses from the object file ABFD, and
4033 the mapping from ABFD's sections onto the segments that own them,
4035 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
4036 segment addresses reported by the target,
4037 store the appropriate offsets for each section in OFFSETS.
4039 If there are fewer entries in SEGMENT_BASES than there are segments
4040 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
4042 If there are more entries, then ignore the extra. The target may
4043 not be able to distinguish between an empty data segment and a
4044 missing data segment; a missing text segment is less plausible. */
4046 symfile_map_offsets_to_segments (bfd
*abfd
, struct symfile_segment_data
*data
,
4047 struct section_offsets
*offsets
,
4048 int num_segment_bases
,
4049 const CORE_ADDR
*segment_bases
)
4054 /* It doesn't make sense to call this function unless you have some
4055 segment base addresses. */
4056 gdb_assert (segment_bases
> 0);
4058 /* If we do not have segment mappings for the object file, we
4059 can not relocate it by segments. */
4060 gdb_assert (data
!= NULL
);
4061 gdb_assert (data
->num_segments
> 0);
4063 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
4065 int which
= data
->segment_info
[i
];
4067 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
4069 /* Don't bother computing offsets for sections that aren't
4070 loaded as part of any segment. */
4074 /* Use the last SEGMENT_BASES entry as the address of any extra
4075 segments mentioned in DATA->segment_info. */
4076 if (which
> num_segment_bases
)
4077 which
= num_segment_bases
;
4079 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
4080 - data
->segment_bases
[which
- 1]);
4087 symfile_find_segment_sections (struct objfile
*objfile
)
4089 bfd
*abfd
= objfile
->obfd
;
4092 struct symfile_segment_data
*data
;
4094 data
= get_symfile_segment_data (objfile
->obfd
);
4098 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
4100 free_symfile_segment_data (data
);
4104 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
4107 int which
= data
->segment_info
[i
];
4111 if (objfile
->sect_index_text
== -1)
4112 objfile
->sect_index_text
= sect
->index
;
4114 if (objfile
->sect_index_rodata
== -1)
4115 objfile
->sect_index_rodata
= sect
->index
;
4117 else if (which
== 2)
4119 if (objfile
->sect_index_data
== -1)
4120 objfile
->sect_index_data
= sect
->index
;
4122 if (objfile
->sect_index_bss
== -1)
4123 objfile
->sect_index_bss
= sect
->index
;
4127 free_symfile_segment_data (data
);
4131 _initialize_symfile (void)
4133 struct cmd_list_element
*c
;
4135 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
4136 Load symbol table from executable file FILE.\n\
4137 The `file' command can also load symbol tables, as well as setting the file\n\
4138 to execute."), &cmdlist
);
4139 set_cmd_completer (c
, filename_completer
);
4141 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
4142 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
4143 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
4144 ADDR is the starting address of the file's text.\n\
4145 The optional arguments are section-name section-address pairs and\n\
4146 should be specified if the data and bss segments are not contiguous\n\
4147 with the text. SECT is a section name to be loaded at SECT_ADDR."),
4149 set_cmd_completer (c
, filename_completer
);
4151 c
= add_cmd ("add-shared-symbol-files", class_files
,
4152 add_shared_symbol_files_command
, _("\
4153 Load the symbols from shared objects in the dynamic linker's link map."),
4155 c
= add_alias_cmd ("assf", "add-shared-symbol-files", class_files
, 1,
4158 c
= add_cmd ("load", class_files
, load_command
, _("\
4159 Dynamically load FILE into the running program, and record its symbols\n\
4160 for access from GDB.\n\
4161 A load OFFSET may also be given."), &cmdlist
);
4162 set_cmd_completer (c
, filename_completer
);
4164 add_setshow_boolean_cmd ("symbol-reloading", class_support
,
4165 &symbol_reloading
, _("\
4166 Set dynamic symbol table reloading multiple times in one run."), _("\
4167 Show dynamic symbol table reloading multiple times in one run."), NULL
,
4169 show_symbol_reloading
,
4170 &setlist
, &showlist
);
4172 add_prefix_cmd ("overlay", class_support
, overlay_command
,
4173 _("Commands for debugging overlays."), &overlaylist
,
4174 "overlay ", 0, &cmdlist
);
4176 add_com_alias ("ovly", "overlay", class_alias
, 1);
4177 add_com_alias ("ov", "overlay", class_alias
, 1);
4179 add_cmd ("map-overlay", class_support
, map_overlay_command
,
4180 _("Assert that an overlay section is mapped."), &overlaylist
);
4182 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
4183 _("Assert that an overlay section is unmapped."), &overlaylist
);
4185 add_cmd ("list-overlays", class_support
, list_overlays_command
,
4186 _("List mappings of overlay sections."), &overlaylist
);
4188 add_cmd ("manual", class_support
, overlay_manual_command
,
4189 _("Enable overlay debugging."), &overlaylist
);
4190 add_cmd ("off", class_support
, overlay_off_command
,
4191 _("Disable overlay debugging."), &overlaylist
);
4192 add_cmd ("auto", class_support
, overlay_auto_command
,
4193 _("Enable automatic overlay debugging."), &overlaylist
);
4194 add_cmd ("load-target", class_support
, overlay_load_command
,
4195 _("Read the overlay mapping state from the target."), &overlaylist
);
4197 /* Filename extension to source language lookup table: */
4198 init_filename_language_table ();
4199 add_setshow_string_noescape_cmd ("extension-language", class_files
,
4201 Set mapping between filename extension and source language."), _("\
4202 Show mapping between filename extension and source language."), _("\
4203 Usage: set extension-language .foo bar"),
4204 set_ext_lang_command
,
4206 &setlist
, &showlist
);
4208 add_info ("extensions", info_ext_lang_command
,
4209 _("All filename extensions associated with a source language."));
4211 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
4212 &debug_file_directory
, _("\
4213 Set the directory where separate debug symbols are searched for."), _("\
4214 Show the directory where separate debug symbols are searched for."), _("\
4215 Separate debug symbols are first searched for in the same\n\
4216 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
4217 and lastly at the path of the directory of the binary with\n\
4218 the global debug-file directory prepended."),
4220 show_debug_file_directory
,
4221 &setlist
, &showlist
);