1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
5 Free Software Foundation, Inc.
7 Contributed by Cygnus Support, using pieces from other GDB modules.
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>. */
25 #include "arch-utils.h"
37 #include "breakpoint.h"
39 #include "complaints.h"
43 #include "filenames.h" /* for DOSish file names */
44 #include "gdb-stabs.h"
45 #include "gdb_obstack.h"
46 #include "completer.h"
49 #include "readline/readline.h"
50 #include "gdb_assert.h"
54 #include "parser-defs.h"
60 #include <sys/types.h>
62 #include "gdb_string.h"
69 int (*deprecated_ui_load_progress_hook
) (const char *section
, unsigned long num
);
70 void (*deprecated_show_load_progress
) (const char *section
,
71 unsigned long section_sent
,
72 unsigned long section_size
,
73 unsigned long total_sent
,
74 unsigned long total_size
);
75 void (*deprecated_pre_add_symbol_hook
) (const char *);
76 void (*deprecated_post_add_symbol_hook
) (void);
78 static void clear_symtab_users_cleanup (void *ignore
);
80 /* Global variables owned by this file */
81 int readnow_symbol_files
; /* Read full symbols immediately */
83 /* External variables and functions referenced. */
85 extern void report_transfer_performance (unsigned long, time_t, time_t);
87 /* Functions this file defines */
90 static int simple_read_overlay_region_table (void);
91 static void simple_free_overlay_region_table (void);
94 static void load_command (char *, int);
96 static void symbol_file_add_main_1 (char *args
, int from_tty
, int flags
);
98 static void add_symbol_file_command (char *, int);
100 static void reread_separate_symbols (struct objfile
*objfile
);
102 static void cashier_psymtab (struct partial_symtab
*);
104 bfd
*symfile_bfd_open (char *);
106 int get_section_index (struct objfile
*, char *);
108 static struct sym_fns
*find_sym_fns (bfd
*);
110 static void decrement_reading_symtab (void *);
112 static void overlay_invalidate_all (void);
114 void list_overlays_command (char *, int);
116 void map_overlay_command (char *, int);
118 void unmap_overlay_command (char *, int);
120 static void overlay_auto_command (char *, int);
122 static void overlay_manual_command (char *, int);
124 static void overlay_off_command (char *, int);
126 static void overlay_load_command (char *, int);
128 static void overlay_command (char *, int);
130 static void simple_free_overlay_table (void);
132 static void read_target_long_array (CORE_ADDR
, unsigned int *, int, 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"),
174 /* If non-zero, shared library symbols will be added automatically
175 when the inferior is created, new libraries are loaded, or when
176 attaching to the inferior. This is almost always what users will
177 want to have happen; but for very large programs, the startup time
178 will be excessive, and so if this is a problem, the user can clear
179 this flag and then add the shared library symbols as needed. Note
180 that there is a potential for confusion, since if the shared
181 library symbols are not loaded, commands like "info fun" will *not*
182 report all the functions that are actually present. */
184 int auto_solib_add
= 1;
186 /* For systems that support it, a threshold size in megabytes. If
187 automatically adding a new library's symbol table to those already
188 known to the debugger would cause the total shared library symbol
189 size to exceed this threshhold, then the shlib's symbols are not
190 added. The threshold is ignored if the user explicitly asks for a
191 shlib to be added, such as when using the "sharedlibrary"
194 int auto_solib_limit
;
197 /* This compares two partial symbols by names, using strcmp_iw_ordered
198 for the comparison. */
201 compare_psymbols (const void *s1p
, const void *s2p
)
203 struct partial_symbol
*const *s1
= s1p
;
204 struct partial_symbol
*const *s2
= s2p
;
206 return strcmp_iw_ordered (SYMBOL_SEARCH_NAME (*s1
),
207 SYMBOL_SEARCH_NAME (*s2
));
211 sort_pst_symbols (struct partial_symtab
*pst
)
213 /* Sort the global list; don't sort the static list */
215 qsort (pst
->objfile
->global_psymbols
.list
+ pst
->globals_offset
,
216 pst
->n_global_syms
, sizeof (struct partial_symbol
*),
220 /* Make a null terminated copy of the string at PTR with SIZE characters in
221 the obstack pointed to by OBSTACKP . Returns the address of the copy.
222 Note that the string at PTR does not have to be null terminated, I.E. it
223 may be part of a larger string and we are only saving a substring. */
226 obsavestring (const char *ptr
, int size
, struct obstack
*obstackp
)
228 char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
229 /* Open-coded memcpy--saves function call time. These strings are usually
230 short. FIXME: Is this really still true with a compiler that can
233 const char *p1
= ptr
;
235 const char *end
= ptr
+ size
;
243 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
244 in the obstack pointed to by OBSTACKP. */
247 obconcat (struct obstack
*obstackp
, const char *s1
, const char *s2
,
250 int len
= strlen (s1
) + strlen (s2
) + strlen (s3
) + 1;
251 char *val
= (char *) obstack_alloc (obstackp
, len
);
258 /* True if we are nested inside psymtab_to_symtab. */
260 int currently_reading_symtab
= 0;
263 decrement_reading_symtab (void *dummy
)
265 currently_reading_symtab
--;
268 /* Get the symbol table that corresponds to a partial_symtab.
269 This is fast after the first time you do it. In fact, there
270 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
274 psymtab_to_symtab (struct partial_symtab
*pst
)
276 /* If it's been looked up before, return it. */
280 /* If it has not yet been read in, read it. */
283 struct cleanup
*back_to
= make_cleanup (decrement_reading_symtab
, NULL
);
284 currently_reading_symtab
++;
285 (*pst
->read_symtab
) (pst
);
286 do_cleanups (back_to
);
292 /* Remember the lowest-addressed loadable section we've seen.
293 This function is called via bfd_map_over_sections.
295 In case of equal vmas, the section with the largest size becomes the
296 lowest-addressed loadable section.
298 If the vmas and sizes are equal, the last section is considered the
299 lowest-addressed loadable section. */
302 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
304 asection
**lowest
= (asection
**) obj
;
306 if (0 == (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
))
309 *lowest
= sect
; /* First loadable section */
310 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
311 *lowest
= sect
; /* A lower loadable section */
312 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
313 && (bfd_section_size (abfd
, (*lowest
))
314 <= bfd_section_size (abfd
, sect
)))
318 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
320 struct section_addr_info
*
321 alloc_section_addr_info (size_t num_sections
)
323 struct section_addr_info
*sap
;
326 size
= (sizeof (struct section_addr_info
)
327 + sizeof (struct other_sections
) * (num_sections
- 1));
328 sap
= (struct section_addr_info
*) xmalloc (size
);
329 memset (sap
, 0, size
);
330 sap
->num_sections
= num_sections
;
336 /* Return a freshly allocated copy of ADDRS. The section names, if
337 any, are also freshly allocated copies of those in ADDRS. */
338 struct section_addr_info
*
339 copy_section_addr_info (struct section_addr_info
*addrs
)
341 struct section_addr_info
*copy
342 = alloc_section_addr_info (addrs
->num_sections
);
345 copy
->num_sections
= addrs
->num_sections
;
346 for (i
= 0; i
< addrs
->num_sections
; i
++)
348 copy
->other
[i
].addr
= addrs
->other
[i
].addr
;
349 if (addrs
->other
[i
].name
)
350 copy
->other
[i
].name
= xstrdup (addrs
->other
[i
].name
);
352 copy
->other
[i
].name
= NULL
;
353 copy
->other
[i
].sectindex
= addrs
->other
[i
].sectindex
;
361 /* Build (allocate and populate) a section_addr_info struct from
362 an existing section table. */
364 extern struct section_addr_info
*
365 build_section_addr_info_from_section_table (const struct target_section
*start
,
366 const struct target_section
*end
)
368 struct section_addr_info
*sap
;
369 const struct target_section
*stp
;
372 sap
= alloc_section_addr_info (end
- start
);
374 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
376 if (bfd_get_section_flags (stp
->bfd
,
377 stp
->the_bfd_section
) & (SEC_ALLOC
| SEC_LOAD
)
378 && oidx
< end
- start
)
380 sap
->other
[oidx
].addr
= stp
->addr
;
381 sap
->other
[oidx
].name
382 = xstrdup (bfd_section_name (stp
->bfd
, stp
->the_bfd_section
));
383 sap
->other
[oidx
].sectindex
= stp
->the_bfd_section
->index
;
392 /* Free all memory allocated by build_section_addr_info_from_section_table. */
395 free_section_addr_info (struct section_addr_info
*sap
)
399 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
400 if (sap
->other
[idx
].name
)
401 xfree (sap
->other
[idx
].name
);
406 /* Initialize OBJFILE's sect_index_* members. */
408 init_objfile_sect_indices (struct objfile
*objfile
)
413 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
415 objfile
->sect_index_text
= sect
->index
;
417 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
419 objfile
->sect_index_data
= sect
->index
;
421 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
423 objfile
->sect_index_bss
= sect
->index
;
425 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
427 objfile
->sect_index_rodata
= sect
->index
;
429 /* This is where things get really weird... We MUST have valid
430 indices for the various sect_index_* members or gdb will abort.
431 So if for example, there is no ".text" section, we have to
432 accomodate that. First, check for a file with the standard
433 one or two segments. */
435 symfile_find_segment_sections (objfile
);
437 /* Except when explicitly adding symbol files at some address,
438 section_offsets contains nothing but zeros, so it doesn't matter
439 which slot in section_offsets the individual sect_index_* members
440 index into. So if they are all zero, it is safe to just point
441 all the currently uninitialized indices to the first slot. But
442 beware: if this is the main executable, it may be relocated
443 later, e.g. by the remote qOffsets packet, and then this will
444 be wrong! That's why we try segments first. */
446 for (i
= 0; i
< objfile
->num_sections
; i
++)
448 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
453 if (i
== objfile
->num_sections
)
455 if (objfile
->sect_index_text
== -1)
456 objfile
->sect_index_text
= 0;
457 if (objfile
->sect_index_data
== -1)
458 objfile
->sect_index_data
= 0;
459 if (objfile
->sect_index_bss
== -1)
460 objfile
->sect_index_bss
= 0;
461 if (objfile
->sect_index_rodata
== -1)
462 objfile
->sect_index_rodata
= 0;
466 /* The arguments to place_section. */
468 struct place_section_arg
470 struct section_offsets
*offsets
;
474 /* Find a unique offset to use for loadable section SECT if
475 the user did not provide an offset. */
478 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
480 struct place_section_arg
*arg
= obj
;
481 CORE_ADDR
*offsets
= arg
->offsets
->offsets
, start_addr
;
483 ULONGEST align
= ((ULONGEST
) 1) << bfd_get_section_alignment (abfd
, sect
);
485 /* We are only interested in allocated sections. */
486 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
489 /* If the user specified an offset, honor it. */
490 if (offsets
[sect
->index
] != 0)
493 /* Otherwise, let's try to find a place for the section. */
494 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
501 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
503 int indx
= cur_sec
->index
;
504 CORE_ADDR cur_offset
;
506 /* We don't need to compare against ourself. */
510 /* We can only conflict with allocated sections. */
511 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
514 /* If the section offset is 0, either the section has not been placed
515 yet, or it was the lowest section placed (in which case LOWEST
516 will be past its end). */
517 if (offsets
[indx
] == 0)
520 /* If this section would overlap us, then we must move up. */
521 if (start_addr
+ bfd_get_section_size (sect
) > offsets
[indx
]
522 && start_addr
< offsets
[indx
] + bfd_get_section_size (cur_sec
))
524 start_addr
= offsets
[indx
] + bfd_get_section_size (cur_sec
);
525 start_addr
= (start_addr
+ align
- 1) & -align
;
530 /* Otherwise, we appear to be OK. So far. */
535 offsets
[sect
->index
] = start_addr
;
536 arg
->lowest
= start_addr
+ bfd_get_section_size (sect
);
539 /* Parse the user's idea of an offset for dynamic linking, into our idea
540 of how to represent it for fast symbol reading. This is the default
541 version of the sym_fns.sym_offsets function for symbol readers that
542 don't need to do anything special. It allocates a section_offsets table
543 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
546 default_symfile_offsets (struct objfile
*objfile
,
547 struct section_addr_info
*addrs
)
551 objfile
->num_sections
= bfd_count_sections (objfile
->obfd
);
552 objfile
->section_offsets
= (struct section_offsets
*)
553 obstack_alloc (&objfile
->objfile_obstack
,
554 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
555 memset (objfile
->section_offsets
, 0,
556 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
558 /* Now calculate offsets for section that were specified by the
560 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
562 struct other_sections
*osp
;
564 osp
= &addrs
->other
[i
] ;
568 /* Record all sections in offsets */
569 /* The section_offsets in the objfile are here filled in using
571 (objfile
->section_offsets
)->offsets
[osp
->sectindex
] = osp
->addr
;
574 /* For relocatable files, all loadable sections will start at zero.
575 The zero is meaningless, so try to pick arbitrary addresses such
576 that no loadable sections overlap. This algorithm is quadratic,
577 but the number of sections in a single object file is generally
579 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
581 struct place_section_arg arg
;
582 bfd
*abfd
= objfile
->obfd
;
584 CORE_ADDR lowest
= 0;
586 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
587 /* We do not expect this to happen; just skip this step if the
588 relocatable file has a section with an assigned VMA. */
589 if (bfd_section_vma (abfd
, cur_sec
) != 0)
594 CORE_ADDR
*offsets
= objfile
->section_offsets
->offsets
;
596 /* Pick non-overlapping offsets for sections the user did not
598 arg
.offsets
= objfile
->section_offsets
;
600 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
602 /* Correctly filling in the section offsets is not quite
603 enough. Relocatable files have two properties that
604 (most) shared objects do not:
606 - Their debug information will contain relocations. Some
607 shared libraries do also, but many do not, so this can not
610 - If there are multiple code sections they will be loaded
611 at different relative addresses in memory than they are
612 in the objfile, since all sections in the file will start
615 Because GDB has very limited ability to map from an
616 address in debug info to the correct code section,
617 it relies on adding SECT_OFF_TEXT to things which might be
618 code. If we clear all the section offsets, and set the
619 section VMAs instead, then symfile_relocate_debug_section
620 will return meaningful debug information pointing at the
623 GDB has too many different data structures for section
624 addresses - a bfd, objfile, and so_list all have section
625 tables, as does exec_ops. Some of these could probably
628 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
629 cur_sec
= cur_sec
->next
)
631 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
634 bfd_set_section_vma (abfd
, cur_sec
, offsets
[cur_sec
->index
]);
635 exec_set_section_address (bfd_get_filename (abfd
), cur_sec
->index
,
636 offsets
[cur_sec
->index
]);
637 offsets
[cur_sec
->index
] = 0;
642 /* Remember the bfd indexes for the .text, .data, .bss and
644 init_objfile_sect_indices (objfile
);
648 /* Divide the file into segments, which are individual relocatable units.
649 This is the default version of the sym_fns.sym_segments function for
650 symbol readers that do not have an explicit representation of segments.
651 It assumes that object files do not have segments, and fully linked
652 files have a single segment. */
654 struct symfile_segment_data
*
655 default_symfile_segments (bfd
*abfd
)
659 struct symfile_segment_data
*data
;
662 /* Relocatable files contain enough information to position each
663 loadable section independently; they should not be relocated
665 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
668 /* Make sure there is at least one loadable section in the file. */
669 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
671 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
679 low
= bfd_get_section_vma (abfd
, sect
);
680 high
= low
+ bfd_get_section_size (sect
);
682 data
= XZALLOC (struct symfile_segment_data
);
683 data
->num_segments
= 1;
684 data
->segment_bases
= XCALLOC (1, CORE_ADDR
);
685 data
->segment_sizes
= XCALLOC (1, CORE_ADDR
);
687 num_sections
= bfd_count_sections (abfd
);
688 data
->segment_info
= XCALLOC (num_sections
, int);
690 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
694 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
697 vma
= bfd_get_section_vma (abfd
, sect
);
700 if (vma
+ bfd_get_section_size (sect
) > high
)
701 high
= vma
+ bfd_get_section_size (sect
);
703 data
->segment_info
[i
] = 1;
706 data
->segment_bases
[0] = low
;
707 data
->segment_sizes
[0] = high
- low
;
712 /* Process a symbol file, as either the main file or as a dynamically
715 OBJFILE is where the symbols are to be read from.
717 ADDRS is the list of section load addresses. If the user has given
718 an 'add-symbol-file' command, then this is the list of offsets and
719 addresses he or she provided as arguments to the command; or, if
720 we're handling a shared library, these are the actual addresses the
721 sections are loaded at, according to the inferior's dynamic linker
722 (as gleaned by GDB's shared library code). We convert each address
723 into an offset from the section VMA's as it appears in the object
724 file, and then call the file's sym_offsets function to convert this
725 into a format-specific offset table --- a `struct section_offsets'.
726 If ADDRS is non-zero, OFFSETS must be zero.
728 OFFSETS is a table of section offsets already in the right
729 format-specific representation. NUM_OFFSETS is the number of
730 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
731 assume this is the proper table the call to sym_offsets described
732 above would produce. Instead of calling sym_offsets, we just dump
733 it right into objfile->section_offsets. (When we're re-reading
734 symbols from an objfile, we don't have the original load address
735 list any more; all we have is the section offset table.) If
736 OFFSETS is non-zero, ADDRS must be zero.
738 ADD_FLAGS encodes verbosity level, whether this is main symbol or
739 an extra symbol file such as dynamically loaded code, and wether
740 breakpoint reset should be deferred. */
743 syms_from_objfile (struct objfile
*objfile
,
744 struct section_addr_info
*addrs
,
745 struct section_offsets
*offsets
,
749 struct section_addr_info
*local_addr
= NULL
;
750 struct cleanup
*old_chain
;
751 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
753 gdb_assert (! (addrs
&& offsets
));
755 init_entry_point_info (objfile
);
756 objfile
->sf
= find_sym_fns (objfile
->obfd
);
758 if (objfile
->sf
== NULL
)
759 return; /* No symbols. */
761 /* Make sure that partially constructed symbol tables will be cleaned up
762 if an error occurs during symbol reading. */
763 old_chain
= make_cleanup_free_objfile (objfile
);
765 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
766 list. We now establish the convention that an addr of zero means
767 no load address was specified. */
768 if (! addrs
&& ! offsets
)
771 = alloc_section_addr_info (bfd_count_sections (objfile
->obfd
));
772 make_cleanup (xfree
, local_addr
);
776 /* Now either addrs or offsets is non-zero. */
780 /* We will modify the main symbol table, make sure that all its users
781 will be cleaned up if an error occurs during symbol reading. */
782 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
784 /* Since no error yet, throw away the old symbol table. */
786 if (symfile_objfile
!= NULL
)
788 free_objfile (symfile_objfile
);
789 gdb_assert (symfile_objfile
== NULL
);
792 /* Currently we keep symbols from the add-symbol-file command.
793 If the user wants to get rid of them, they should do "symbol-file"
794 without arguments first. Not sure this is the best behavior
797 (*objfile
->sf
->sym_new_init
) (objfile
);
800 /* Convert addr into an offset rather than an absolute address.
801 We find the lowest address of a loaded segment in the objfile,
802 and assume that <addr> is where that got loaded.
804 We no longer warn if the lowest section is not a text segment (as
805 happens for the PA64 port. */
806 if (!mainline
&& addrs
&& addrs
->other
[0].name
)
808 asection
*lower_sect
;
810 CORE_ADDR lower_offset
;
813 /* Find lowest loadable section to be used as starting point for
814 continguous sections. FIXME!! won't work without call to find
815 .text first, but this assumes text is lowest section. */
816 lower_sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
817 if (lower_sect
== NULL
)
818 bfd_map_over_sections (objfile
->obfd
, find_lowest_section
,
820 if (lower_sect
== NULL
)
822 warning (_("no loadable sections found in added symbol-file %s"),
827 lower_offset
= bfd_section_vma (objfile
->obfd
, lower_sect
);
829 /* Calculate offsets for the loadable sections.
830 FIXME! Sections must be in order of increasing loadable section
831 so that contiguous sections can use the lower-offset!!!
833 Adjust offsets if the segments are not contiguous.
834 If the section is contiguous, its offset should be set to
835 the offset of the highest loadable section lower than it
836 (the loadable section directly below it in memory).
837 this_offset = lower_offset = lower_addr - lower_orig_addr */
839 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
841 if (addrs
->other
[i
].addr
!= 0)
843 sect
= bfd_get_section_by_name (objfile
->obfd
,
844 addrs
->other
[i
].name
);
848 -= bfd_section_vma (objfile
->obfd
, sect
);
849 lower_offset
= addrs
->other
[i
].addr
;
850 /* This is the index used by BFD. */
851 addrs
->other
[i
].sectindex
= sect
->index
;
855 warning (_("section %s not found in %s"),
856 addrs
->other
[i
].name
,
858 addrs
->other
[i
].addr
= 0;
862 addrs
->other
[i
].addr
= lower_offset
;
866 /* Initialize symbol reading routines for this objfile, allow complaints to
867 appear for this new file, and record how verbose to be, then do the
868 initial symbol reading for this file. */
870 (*objfile
->sf
->sym_init
) (objfile
);
871 clear_complaints (&symfile_complaints
, 1, add_flags
& SYMFILE_VERBOSE
);
874 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
877 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_offsets
);
879 /* Just copy in the offset table directly as given to us. */
880 objfile
->num_sections
= num_offsets
;
881 objfile
->section_offsets
882 = ((struct section_offsets
*)
883 obstack_alloc (&objfile
->objfile_obstack
, size
));
884 memcpy (objfile
->section_offsets
, offsets
, size
);
886 init_objfile_sect_indices (objfile
);
889 (*objfile
->sf
->sym_read
) (objfile
, mainline
);
891 /* Discard cleanups as symbol reading was successful. */
893 discard_cleanups (old_chain
);
897 /* Perform required actions after either reading in the initial
898 symbols for a new objfile, or mapping in the symbols from a reusable
902 new_symfile_objfile (struct objfile
*objfile
, int add_flags
)
905 /* If this is the main symbol file we have to clean up all users of the
906 old main symbol file. Otherwise it is sufficient to fixup all the
907 breakpoints that may have been redefined by this symbol file. */
908 if (add_flags
& SYMFILE_MAINLINE
)
910 /* OK, make it the "real" symbol file. */
911 symfile_objfile
= objfile
;
913 clear_symtab_users ();
915 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
917 breakpoint_re_set ();
920 /* We're done reading the symbol file; finish off complaints. */
921 clear_complaints (&symfile_complaints
, 0, add_flags
& SYMFILE_VERBOSE
);
924 /* Process a symbol file, as either the main file or as a dynamically
927 ABFD is a BFD already open on the file, as from symfile_bfd_open.
928 This BFD will be closed on error, and is always consumed by this function.
930 ADD_FLAGS encodes verbosity, whether this is main symbol file or
931 extra, such as dynamically loaded code, and what to do with breakpoins.
933 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
934 syms_from_objfile, above.
935 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
937 Upon success, returns a pointer to the objfile that was added.
938 Upon failure, jumps back to command level (never returns). */
940 static struct objfile
*
941 symbol_file_add_with_addrs_or_offsets (bfd
*abfd
,
943 struct section_addr_info
*addrs
,
944 struct section_offsets
*offsets
,
948 struct objfile
*objfile
;
949 struct partial_symtab
*psymtab
;
950 char *debugfile
= NULL
;
951 struct section_addr_info
*orig_addrs
= NULL
;
952 struct cleanup
*my_cleanups
;
953 const char *name
= bfd_get_filename (abfd
);
954 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
956 my_cleanups
= make_cleanup_bfd_close (abfd
);
958 /* Give user a chance to burp if we'd be
959 interactively wiping out any existing symbols. */
961 if ((have_full_symbols () || have_partial_symbols ())
962 && (add_flags
& SYMFILE_MAINLINE
)
964 && !query (_("Load new symbol table from \"%s\"? "), name
))
965 error (_("Not confirmed."));
967 objfile
= allocate_objfile (abfd
, flags
);
968 discard_cleanups (my_cleanups
);
972 orig_addrs
= copy_section_addr_info (addrs
);
973 make_cleanup_free_section_addr_info (orig_addrs
);
976 /* We either created a new mapped symbol table, mapped an existing
977 symbol table file which has not had initial symbol reading
978 performed, or need to read an unmapped symbol table. */
979 if (from_tty
|| info_verbose
)
981 if (deprecated_pre_add_symbol_hook
)
982 deprecated_pre_add_symbol_hook (name
);
985 printf_unfiltered (_("Reading symbols from %s..."), name
);
987 gdb_flush (gdb_stdout
);
990 syms_from_objfile (objfile
, addrs
, offsets
, num_offsets
,
993 /* We now have at least a partial symbol table. Check to see if the
994 user requested that all symbols be read on initial access via either
995 the gdb startup command line or on a per symbol file basis. Expand
996 all partial symbol tables for this objfile if so. */
998 if ((flags
& OBJF_READNOW
) || readnow_symbol_files
)
1000 if (from_tty
|| info_verbose
)
1002 printf_unfiltered (_("expanding to full symbols..."));
1004 gdb_flush (gdb_stdout
);
1007 for (psymtab
= objfile
->psymtabs
;
1009 psymtab
= psymtab
->next
)
1011 psymtab_to_symtab (psymtab
);
1015 /* If the file has its own symbol tables it has no separate debug info.
1016 `.dynsym'/`.symtab' go to MSYMBOLS, `.debug_info' goes to SYMTABS/PSYMTABS.
1017 `.gnu_debuglink' may no longer be present with `.note.gnu.build-id'. */
1018 if (objfile
->psymtabs
== NULL
)
1019 debugfile
= find_separate_debug_file (objfile
);
1024 objfile
->separate_debug_objfile
1025 = symbol_file_add (debugfile
, add_flags
, orig_addrs
, flags
);
1029 objfile
->separate_debug_objfile
1030 = symbol_file_add (debugfile
, add_flags
, NULL
, flags
);
1032 objfile
->separate_debug_objfile
->separate_debug_objfile_backlink
1035 /* Put the separate debug object before the normal one, this is so that
1036 usage of the ALL_OBJFILES_SAFE macro will stay safe. */
1037 put_objfile_before (objfile
->separate_debug_objfile
, objfile
);
1042 if ((from_tty
|| info_verbose
)
1043 && !objfile_has_symbols (objfile
))
1046 printf_unfiltered (_("(no debugging symbols found)..."));
1050 if (from_tty
|| info_verbose
)
1052 if (deprecated_post_add_symbol_hook
)
1053 deprecated_post_add_symbol_hook ();
1055 printf_unfiltered (_("done.\n"));
1058 /* We print some messages regardless of whether 'from_tty ||
1059 info_verbose' is true, so make sure they go out at the right
1061 gdb_flush (gdb_stdout
);
1063 do_cleanups (my_cleanups
);
1065 if (objfile
->sf
== NULL
)
1067 observer_notify_new_objfile (objfile
);
1068 return objfile
; /* No symbols. */
1071 new_symfile_objfile (objfile
, add_flags
);
1073 observer_notify_new_objfile (objfile
);
1075 bfd_cache_close_all ();
1080 /* Process the symbol file ABFD, as either the main file or as a
1081 dynamically loaded file.
1083 See symbol_file_add_with_addrs_or_offsets's comments for
1086 symbol_file_add_from_bfd (bfd
*abfd
, int add_flags
,
1087 struct section_addr_info
*addrs
,
1090 return symbol_file_add_with_addrs_or_offsets (abfd
, add_flags
, addrs
, 0, 0,
1095 /* Process a symbol file, as either the main file or as a dynamically
1096 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
1099 symbol_file_add (char *name
, int add_flags
, struct section_addr_info
*addrs
,
1102 return symbol_file_add_from_bfd (symfile_bfd_open (name
), add_flags
, addrs
,
1107 /* Call symbol_file_add() with default values and update whatever is
1108 affected by the loading of a new main().
1109 Used when the file is supplied in the gdb command line
1110 and by some targets with special loading requirements.
1111 The auxiliary function, symbol_file_add_main_1(), has the flags
1112 argument for the switches that can only be specified in the symbol_file
1116 symbol_file_add_main (char *args
, int from_tty
)
1118 symbol_file_add_main_1 (args
, from_tty
, 0);
1122 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
1124 const int add_flags
= SYMFILE_MAINLINE
| (from_tty
? SYMFILE_VERBOSE
: 0);
1125 symbol_file_add (args
, add_flags
, NULL
, flags
);
1127 /* Getting new symbols may change our opinion about
1128 what is frameless. */
1129 reinit_frame_cache ();
1131 set_initial_language ();
1135 symbol_file_clear (int from_tty
)
1137 if ((have_full_symbols () || have_partial_symbols ())
1140 ? !query (_("Discard symbol table from `%s'? "),
1141 symfile_objfile
->name
)
1142 : !query (_("Discard symbol table? "))))
1143 error (_("Not confirmed."));
1145 free_all_objfiles ();
1147 /* solib descriptors may have handles to objfiles. Since their
1148 storage has just been released, we'd better wipe the solib
1149 descriptors as well. */
1150 no_shared_libraries (NULL
, from_tty
);
1152 gdb_assert (symfile_objfile
== NULL
);
1154 printf_unfiltered (_("No symbol file now.\n"));
1163 /* Locate NT_GNU_BUILD_ID from ABFD and return its content. */
1165 static struct build_id
*
1166 build_id_bfd_get (bfd
*abfd
)
1168 struct build_id
*retval
;
1170 if (!bfd_check_format (abfd
, bfd_object
)
1171 || bfd_get_flavour (abfd
) != bfd_target_elf_flavour
1172 || elf_tdata (abfd
)->build_id
== NULL
)
1175 retval
= xmalloc (sizeof *retval
- 1 + elf_tdata (abfd
)->build_id_size
);
1176 retval
->size
= elf_tdata (abfd
)->build_id_size
;
1177 memcpy (retval
->data
, elf_tdata (abfd
)->build_id
, retval
->size
);
1182 /* Return if FILENAME has NT_GNU_BUILD_ID matching the CHECK value. */
1185 build_id_verify (const char *filename
, struct build_id
*check
)
1188 struct build_id
*found
= NULL
;
1191 /* We expect to be silent on the non-existing files. */
1192 if (remote_filename_p (filename
))
1193 abfd
= remote_bfd_open (filename
, gnutarget
);
1195 abfd
= bfd_openr (filename
, gnutarget
);
1199 found
= build_id_bfd_get (abfd
);
1202 warning (_("File \"%s\" has no build-id, file skipped"), filename
);
1203 else if (found
->size
!= check
->size
1204 || memcmp (found
->data
, check
->data
, found
->size
) != 0)
1205 warning (_("File \"%s\" has a different build-id, file skipped"), filename
);
1209 if (!bfd_close (abfd
))
1210 warning (_("cannot close \"%s\": %s"), filename
,
1211 bfd_errmsg (bfd_get_error ()));
1219 build_id_to_debug_filename (struct build_id
*build_id
)
1221 char *link
, *debugdir
, *retval
= NULL
;
1223 /* DEBUG_FILE_DIRECTORY/.build-id/ab/cdef */
1224 link
= alloca (strlen (debug_file_directory
) + (sizeof "/.build-id/" - 1) + 1
1225 + 2 * build_id
->size
+ (sizeof ".debug" - 1) + 1);
1227 /* Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1228 cause "/.build-id/..." lookups. */
1230 debugdir
= debug_file_directory
;
1233 char *s
, *debugdir_end
;
1234 gdb_byte
*data
= build_id
->data
;
1235 size_t size
= build_id
->size
;
1237 while (*debugdir
== DIRNAME_SEPARATOR
)
1240 debugdir_end
= strchr (debugdir
, DIRNAME_SEPARATOR
);
1241 if (debugdir_end
== NULL
)
1242 debugdir_end
= &debugdir
[strlen (debugdir
)];
1244 memcpy (link
, debugdir
, debugdir_end
- debugdir
);
1245 s
= &link
[debugdir_end
- debugdir
];
1246 s
+= sprintf (s
, "/.build-id/");
1250 s
+= sprintf (s
, "%02x", (unsigned) *data
++);
1255 s
+= sprintf (s
, "%02x", (unsigned) *data
++);
1256 strcpy (s
, ".debug");
1258 /* lrealpath() is expensive even for the usually non-existent files. */
1259 if (access (link
, F_OK
) == 0)
1260 retval
= lrealpath (link
);
1262 if (retval
!= NULL
&& !build_id_verify (retval
, build_id
))
1271 debugdir
= debugdir_end
;
1273 while (*debugdir
!= 0);
1279 get_debug_link_info (struct objfile
*objfile
, unsigned long *crc32_out
)
1282 bfd_size_type debuglink_size
;
1283 unsigned long crc32
;
1288 sect
= bfd_get_section_by_name (objfile
->obfd
, ".gnu_debuglink");
1293 debuglink_size
= bfd_section_size (objfile
->obfd
, sect
);
1295 contents
= xmalloc (debuglink_size
);
1296 bfd_get_section_contents (objfile
->obfd
, sect
, contents
,
1297 (file_ptr
)0, (bfd_size_type
)debuglink_size
);
1299 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1300 crc_offset
= strlen (contents
) + 1;
1301 crc_offset
= (crc_offset
+ 3) & ~3;
1303 crc32
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) (contents
+ crc_offset
));
1310 separate_debug_file_exists (const char *name
, unsigned long crc
,
1311 const char *parent_name
)
1313 unsigned long file_crc
= 0;
1315 gdb_byte buffer
[8*1024];
1318 if (remote_filename_p (name
))
1319 abfd
= remote_bfd_open (name
, gnutarget
);
1321 abfd
= bfd_openr (name
, gnutarget
);
1326 while ((count
= bfd_bread (buffer
, sizeof (buffer
), abfd
)) > 0)
1327 file_crc
= gnu_debuglink_crc32 (file_crc
, buffer
, count
);
1331 if (crc
!= file_crc
)
1333 warning (_("the debug information found in \"%s\""
1334 " does not match \"%s\" (CRC mismatch).\n"),
1342 char *debug_file_directory
= NULL
;
1344 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1345 struct cmd_list_element
*c
, const char *value
)
1347 fprintf_filtered (file
, _("\
1348 The directory where separate debug symbols are searched for is \"%s\".\n"),
1352 #if ! defined (DEBUG_SUBDIRECTORY)
1353 #define DEBUG_SUBDIRECTORY ".debug"
1357 find_separate_debug_file (struct objfile
*objfile
)
1360 char *basename
, *name_copy
, *debugdir
;
1362 char *debugfile
= NULL
;
1363 char *canon_name
= NULL
;
1364 bfd_size_type debuglink_size
;
1365 unsigned long crc32
;
1367 struct build_id
*build_id
;
1369 build_id
= build_id_bfd_get (objfile
->obfd
);
1370 if (build_id
!= NULL
)
1372 char *build_id_name
;
1374 build_id_name
= build_id_to_debug_filename (build_id
);
1376 /* Prevent looping on a stripped .debug file. */
1377 if (build_id_name
!= NULL
&& strcmp (build_id_name
, objfile
->name
) == 0)
1379 warning (_("\"%s\": separate debug info file has no debug info"),
1381 xfree (build_id_name
);
1383 else if (build_id_name
!= NULL
)
1384 return build_id_name
;
1387 basename
= get_debug_link_info (objfile
, &crc32
);
1389 if (basename
== NULL
)
1390 /* There's no separate debug info, hence there's no way we could
1391 load it => no warning. */
1392 goto cleanup_return_debugfile
;
1394 dir
= xstrdup (objfile
->name
);
1396 /* Strip off the final filename part, leaving the directory name,
1397 followed by a slash. Objfile names should always be absolute and
1398 tilde-expanded, so there should always be a slash in there
1400 for (i
= strlen(dir
) - 1; i
>= 0; i
--)
1402 if (IS_DIR_SEPARATOR (dir
[i
]))
1405 gdb_assert (i
>= 0 && IS_DIR_SEPARATOR (dir
[i
]));
1408 /* Set I to max (strlen (canon_name), strlen (dir)). */
1409 canon_name
= lrealpath (dir
);
1411 if (canon_name
&& strlen (canon_name
) > i
)
1412 i
= strlen (canon_name
);
1414 debugfile
= xmalloc (strlen (debug_file_directory
) + 1
1416 + strlen (DEBUG_SUBDIRECTORY
)
1421 /* First try in the same directory as the original file. */
1422 strcpy (debugfile
, dir
);
1423 strcat (debugfile
, basename
);
1425 if (separate_debug_file_exists (debugfile
, crc32
, objfile
->name
))
1426 goto cleanup_return_debugfile
;
1428 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1429 strcpy (debugfile
, dir
);
1430 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1431 strcat (debugfile
, "/");
1432 strcat (debugfile
, basename
);
1434 if (separate_debug_file_exists (debugfile
, crc32
, objfile
->name
))
1435 goto cleanup_return_debugfile
;
1437 /* Then try in the global debugfile directories.
1439 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1440 cause "/..." lookups. */
1442 debugdir
= debug_file_directory
;
1447 while (*debugdir
== DIRNAME_SEPARATOR
)
1450 debugdir_end
= strchr (debugdir
, DIRNAME_SEPARATOR
);
1451 if (debugdir_end
== NULL
)
1452 debugdir_end
= &debugdir
[strlen (debugdir
)];
1454 memcpy (debugfile
, debugdir
, debugdir_end
- debugdir
);
1455 debugfile
[debugdir_end
- debugdir
] = 0;
1456 strcat (debugfile
, "/");
1457 strcat (debugfile
, dir
);
1458 strcat (debugfile
, basename
);
1460 if (separate_debug_file_exists (debugfile
, crc32
, objfile
->name
))
1461 goto cleanup_return_debugfile
;
1463 /* If the file is in the sysroot, try using its base path in the
1464 global debugfile directory. */
1466 && strncmp (canon_name
, gdb_sysroot
, strlen (gdb_sysroot
)) == 0
1467 && IS_DIR_SEPARATOR (canon_name
[strlen (gdb_sysroot
)]))
1469 memcpy (debugfile
, debugdir
, debugdir_end
- debugdir
);
1470 debugfile
[debugdir_end
- debugdir
] = 0;
1471 strcat (debugfile
, canon_name
+ strlen (gdb_sysroot
));
1472 strcat (debugfile
, "/");
1473 strcat (debugfile
, basename
);
1475 if (separate_debug_file_exists (debugfile
, crc32
, objfile
->name
))
1476 goto cleanup_return_debugfile
;
1479 debugdir
= debugdir_end
;
1481 while (*debugdir
!= 0);
1486 cleanup_return_debugfile
:
1494 /* This is the symbol-file command. Read the file, analyze its
1495 symbols, and add a struct symtab to a symtab list. The syntax of
1496 the command is rather bizarre:
1498 1. The function buildargv implements various quoting conventions
1499 which are undocumented and have little or nothing in common with
1500 the way things are quoted (or not quoted) elsewhere in GDB.
1502 2. Options are used, which are not generally used in GDB (perhaps
1503 "set mapped on", "set readnow on" would be better)
1505 3. The order of options matters, which is contrary to GNU
1506 conventions (because it is confusing and inconvenient). */
1509 symbol_file_command (char *args
, int from_tty
)
1515 symbol_file_clear (from_tty
);
1519 char **argv
= gdb_buildargv (args
);
1520 int flags
= OBJF_USERLOADED
;
1521 struct cleanup
*cleanups
;
1524 cleanups
= make_cleanup_freeargv (argv
);
1525 while (*argv
!= NULL
)
1527 if (strcmp (*argv
, "-readnow") == 0)
1528 flags
|= OBJF_READNOW
;
1529 else if (**argv
== '-')
1530 error (_("unknown option `%s'"), *argv
);
1533 symbol_file_add_main_1 (*argv
, from_tty
, flags
);
1541 error (_("no symbol file name was specified"));
1543 do_cleanups (cleanups
);
1547 /* Set the initial language.
1549 FIXME: A better solution would be to record the language in the
1550 psymtab when reading partial symbols, and then use it (if known) to
1551 set the language. This would be a win for formats that encode the
1552 language in an easily discoverable place, such as DWARF. For
1553 stabs, we can jump through hoops looking for specially named
1554 symbols or try to intuit the language from the specific type of
1555 stabs we find, but we can't do that until later when we read in
1559 set_initial_language (void)
1561 struct partial_symtab
*pst
;
1562 enum language lang
= language_unknown
;
1564 pst
= find_main_psymtab ();
1567 if (pst
->filename
!= NULL
)
1568 lang
= deduce_language_from_filename (pst
->filename
);
1570 if (lang
== language_unknown
)
1572 /* Make C the default language */
1576 set_language (lang
);
1577 expected_language
= current_language
; /* Don't warn the user. */
1581 /* Open the file specified by NAME and hand it off to BFD for
1582 preliminary analysis. Return a newly initialized bfd *, which
1583 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1584 absolute). In case of trouble, error() is called. */
1587 symfile_bfd_open (char *name
)
1591 char *absolute_name
;
1593 if (remote_filename_p (name
))
1595 name
= xstrdup (name
);
1596 sym_bfd
= remote_bfd_open (name
, gnutarget
);
1599 make_cleanup (xfree
, name
);
1600 error (_("`%s': can't open to read symbols: %s."), name
,
1601 bfd_errmsg (bfd_get_error ()));
1604 if (!bfd_check_format (sym_bfd
, bfd_object
))
1606 bfd_close (sym_bfd
);
1607 make_cleanup (xfree
, name
);
1608 error (_("`%s': can't read symbols: %s."), name
,
1609 bfd_errmsg (bfd_get_error ()));
1615 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy. */
1617 /* Look down path for it, allocate 2nd new malloc'd copy. */
1618 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, name
,
1619 O_RDONLY
| O_BINARY
, &absolute_name
);
1620 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1623 char *exename
= alloca (strlen (name
) + 5);
1624 strcat (strcpy (exename
, name
), ".exe");
1625 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, exename
,
1626 O_RDONLY
| O_BINARY
, &absolute_name
);
1631 make_cleanup (xfree
, name
);
1632 perror_with_name (name
);
1635 /* Free 1st new malloc'd copy, but keep the 2nd malloc'd copy in
1636 bfd. It'll be freed in free_objfile(). */
1638 name
= absolute_name
;
1640 sym_bfd
= bfd_fopen (name
, gnutarget
, FOPEN_RB
, desc
);
1644 make_cleanup (xfree
, name
);
1645 error (_("`%s': can't open to read symbols: %s."), name
,
1646 bfd_errmsg (bfd_get_error ()));
1648 bfd_set_cacheable (sym_bfd
, 1);
1650 if (!bfd_check_format (sym_bfd
, bfd_object
))
1652 /* FIXME: should be checking for errors from bfd_close (for one
1653 thing, on error it does not free all the storage associated
1655 bfd_close (sym_bfd
); /* This also closes desc. */
1656 make_cleanup (xfree
, name
);
1657 error (_("`%s': can't read symbols: %s."), name
,
1658 bfd_errmsg (bfd_get_error ()));
1661 /* bfd_usrdata exists for applications and libbfd must not touch it. */
1662 gdb_assert (bfd_usrdata (sym_bfd
) == NULL
);
1667 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1668 the section was not found. */
1671 get_section_index (struct objfile
*objfile
, char *section_name
)
1673 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1681 /* Link SF into the global symtab_fns list. Called on startup by the
1682 _initialize routine in each object file format reader, to register
1683 information about each format the the reader is prepared to
1687 add_symtab_fns (struct sym_fns
*sf
)
1689 sf
->next
= symtab_fns
;
1693 /* Initialize OBJFILE to read symbols from its associated BFD. It
1694 either returns or calls error(). The result is an initialized
1695 struct sym_fns in the objfile structure, that contains cached
1696 information about the symbol file. */
1698 static struct sym_fns
*
1699 find_sym_fns (bfd
*abfd
)
1702 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1704 if (our_flavour
== bfd_target_srec_flavour
1705 || our_flavour
== bfd_target_ihex_flavour
1706 || our_flavour
== bfd_target_tekhex_flavour
)
1707 return NULL
; /* No symbols. */
1709 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
->next
)
1710 if (our_flavour
== sf
->sym_flavour
)
1713 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1714 bfd_get_target (abfd
));
1718 /* This function runs the load command of our current target. */
1721 load_command (char *arg
, int from_tty
)
1723 /* The user might be reloading because the binary has changed. Take
1724 this opportunity to check. */
1725 reopen_exec_file ();
1733 parg
= arg
= get_exec_file (1);
1735 /* Count how many \ " ' tab space there are in the name. */
1736 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1744 /* We need to quote this string so buildargv can pull it apart. */
1745 char *temp
= xmalloc (strlen (arg
) + count
+ 1 );
1749 make_cleanup (xfree
, temp
);
1752 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1754 strncpy (ptemp
, prev
, parg
- prev
);
1755 ptemp
+= parg
- prev
;
1759 strcpy (ptemp
, prev
);
1765 target_load (arg
, from_tty
);
1767 /* After re-loading the executable, we don't really know which
1768 overlays are mapped any more. */
1769 overlay_cache_invalid
= 1;
1772 /* This version of "load" should be usable for any target. Currently
1773 it is just used for remote targets, not inftarg.c or core files,
1774 on the theory that only in that case is it useful.
1776 Avoiding xmodem and the like seems like a win (a) because we don't have
1777 to worry about finding it, and (b) On VMS, fork() is very slow and so
1778 we don't want to run a subprocess. On the other hand, I'm not sure how
1779 performance compares. */
1781 static int validate_download
= 0;
1783 /* Callback service function for generic_load (bfd_map_over_sections). */
1786 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1788 bfd_size_type
*sum
= data
;
1790 *sum
+= bfd_get_section_size (asec
);
1793 /* Opaque data for load_section_callback. */
1794 struct load_section_data
{
1795 unsigned long load_offset
;
1796 struct load_progress_data
*progress_data
;
1797 VEC(memory_write_request_s
) *requests
;
1800 /* Opaque data for load_progress. */
1801 struct load_progress_data
{
1802 /* Cumulative data. */
1803 unsigned long write_count
;
1804 unsigned long data_count
;
1805 bfd_size_type total_size
;
1808 /* Opaque data for load_progress for a single section. */
1809 struct load_progress_section_data
{
1810 struct load_progress_data
*cumulative
;
1812 /* Per-section data. */
1813 const char *section_name
;
1814 ULONGEST section_sent
;
1815 ULONGEST section_size
;
1820 /* Target write callback routine for progress reporting. */
1823 load_progress (ULONGEST bytes
, void *untyped_arg
)
1825 struct load_progress_section_data
*args
= untyped_arg
;
1826 struct load_progress_data
*totals
;
1829 /* Writing padding data. No easy way to get at the cumulative
1830 stats, so just ignore this. */
1833 totals
= args
->cumulative
;
1835 if (bytes
== 0 && args
->section_sent
== 0)
1837 /* The write is just starting. Let the user know we've started
1839 ui_out_message (uiout
, 0, "Loading section %s, size %s lma %s\n",
1840 args
->section_name
, hex_string (args
->section_size
),
1841 paddress (target_gdbarch
, args
->lma
));
1845 if (validate_download
)
1847 /* Broken memories and broken monitors manifest themselves here
1848 when bring new computers to life. This doubles already slow
1850 /* NOTE: cagney/1999-10-18: A more efficient implementation
1851 might add a verify_memory() method to the target vector and
1852 then use that. remote.c could implement that method using
1853 the ``qCRC'' packet. */
1854 gdb_byte
*check
= xmalloc (bytes
);
1855 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
1857 if (target_read_memory (args
->lma
, check
, bytes
) != 0)
1858 error (_("Download verify read failed at %s"),
1859 paddress (target_gdbarch
, args
->lma
));
1860 if (memcmp (args
->buffer
, check
, bytes
) != 0)
1861 error (_("Download verify compare failed at %s"),
1862 paddress (target_gdbarch
, args
->lma
));
1863 do_cleanups (verify_cleanups
);
1865 totals
->data_count
+= bytes
;
1867 args
->buffer
+= bytes
;
1868 totals
->write_count
+= 1;
1869 args
->section_sent
+= bytes
;
1871 || (deprecated_ui_load_progress_hook
!= NULL
1872 && deprecated_ui_load_progress_hook (args
->section_name
,
1873 args
->section_sent
)))
1874 error (_("Canceled the download"));
1876 if (deprecated_show_load_progress
!= NULL
)
1877 deprecated_show_load_progress (args
->section_name
,
1881 totals
->total_size
);
1884 /* Callback service function for generic_load (bfd_map_over_sections). */
1887 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1889 struct memory_write_request
*new_request
;
1890 struct load_section_data
*args
= data
;
1891 struct load_progress_section_data
*section_data
;
1892 bfd_size_type size
= bfd_get_section_size (asec
);
1894 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1896 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
1902 new_request
= VEC_safe_push (memory_write_request_s
,
1903 args
->requests
, NULL
);
1904 memset (new_request
, 0, sizeof (struct memory_write_request
));
1905 section_data
= xcalloc (1, sizeof (struct load_progress_section_data
));
1906 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1907 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size be in instead? */
1908 new_request
->data
= xmalloc (size
);
1909 new_request
->baton
= section_data
;
1911 buffer
= new_request
->data
;
1913 section_data
->cumulative
= args
->progress_data
;
1914 section_data
->section_name
= sect_name
;
1915 section_data
->section_size
= size
;
1916 section_data
->lma
= new_request
->begin
;
1917 section_data
->buffer
= buffer
;
1919 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1922 /* Clean up an entire memory request vector, including load
1923 data and progress records. */
1926 clear_memory_write_data (void *arg
)
1928 VEC(memory_write_request_s
) **vec_p
= arg
;
1929 VEC(memory_write_request_s
) *vec
= *vec_p
;
1931 struct memory_write_request
*mr
;
1933 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
1938 VEC_free (memory_write_request_s
, vec
);
1942 generic_load (char *args
, int from_tty
)
1945 struct timeval start_time
, end_time
;
1947 struct cleanup
*old_cleanups
= make_cleanup (null_cleanup
, 0);
1948 struct load_section_data cbdata
;
1949 struct load_progress_data total_progress
;
1954 memset (&cbdata
, 0, sizeof (cbdata
));
1955 memset (&total_progress
, 0, sizeof (total_progress
));
1956 cbdata
.progress_data
= &total_progress
;
1958 make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
1961 error_no_arg (_("file to load"));
1963 argv
= gdb_buildargv (args
);
1964 make_cleanup_freeargv (argv
);
1966 filename
= tilde_expand (argv
[0]);
1967 make_cleanup (xfree
, filename
);
1969 if (argv
[1] != NULL
)
1973 cbdata
.load_offset
= strtoul (argv
[1], &endptr
, 0);
1975 /* If the last word was not a valid number then
1976 treat it as a file name with spaces in. */
1977 if (argv
[1] == endptr
)
1978 error (_("Invalid download offset:%s."), argv
[1]);
1980 if (argv
[2] != NULL
)
1981 error (_("Too many parameters."));
1984 /* Open the file for loading. */
1985 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
1986 if (loadfile_bfd
== NULL
)
1988 perror_with_name (filename
);
1992 /* FIXME: should be checking for errors from bfd_close (for one thing,
1993 on error it does not free all the storage associated with the
1995 make_cleanup_bfd_close (loadfile_bfd
);
1997 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
1999 error (_("\"%s\" is not an object file: %s"), filename
,
2000 bfd_errmsg (bfd_get_error ()));
2003 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
2004 (void *) &total_progress
.total_size
);
2006 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
2008 gettimeofday (&start_time
, NULL
);
2010 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2011 load_progress
) != 0)
2012 error (_("Load failed"));
2014 gettimeofday (&end_time
, NULL
);
2016 entry
= bfd_get_start_address (loadfile_bfd
);
2017 ui_out_text (uiout
, "Start address ");
2018 ui_out_field_fmt (uiout
, "address", "%s", paddress (target_gdbarch
, entry
));
2019 ui_out_text (uiout
, ", load size ");
2020 ui_out_field_fmt (uiout
, "load-size", "%lu", total_progress
.data_count
);
2021 ui_out_text (uiout
, "\n");
2022 /* We were doing this in remote-mips.c, I suspect it is right
2023 for other targets too. */
2024 regcache_write_pc (get_current_regcache (), entry
);
2026 /* FIXME: are we supposed to call symbol_file_add or not? According
2027 to a comment from remote-mips.c (where a call to symbol_file_add
2028 was commented out), making the call confuses GDB if more than one
2029 file is loaded in. Some targets do (e.g., remote-vx.c) but
2030 others don't (or didn't - perhaps they have all been deleted). */
2032 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2033 total_progress
.write_count
,
2034 &start_time
, &end_time
);
2036 do_cleanups (old_cleanups
);
2039 /* Report how fast the transfer went. */
2041 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
2042 replaced by print_transfer_performance (with a very different
2043 function signature). */
2046 report_transfer_performance (unsigned long data_count
, time_t start_time
,
2049 struct timeval start
, end
;
2051 start
.tv_sec
= start_time
;
2053 end
.tv_sec
= end_time
;
2056 print_transfer_performance (gdb_stdout
, data_count
, 0, &start
, &end
);
2060 print_transfer_performance (struct ui_file
*stream
,
2061 unsigned long data_count
,
2062 unsigned long write_count
,
2063 const struct timeval
*start_time
,
2064 const struct timeval
*end_time
)
2066 ULONGEST time_count
;
2068 /* Compute the elapsed time in milliseconds, as a tradeoff between
2069 accuracy and overflow. */
2070 time_count
= (end_time
->tv_sec
- start_time
->tv_sec
) * 1000;
2071 time_count
+= (end_time
->tv_usec
- start_time
->tv_usec
) / 1000;
2073 ui_out_text (uiout
, "Transfer rate: ");
2076 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / time_count
;
2078 if (ui_out_is_mi_like_p (uiout
))
2080 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
* 8);
2081 ui_out_text (uiout
, " bits/sec");
2083 else if (rate
< 1024)
2085 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
);
2086 ui_out_text (uiout
, " bytes/sec");
2090 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
/ 1024);
2091 ui_out_text (uiout
, " KB/sec");
2096 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
2097 ui_out_text (uiout
, " bits in <1 sec");
2099 if (write_count
> 0)
2101 ui_out_text (uiout
, ", ");
2102 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
2103 ui_out_text (uiout
, " bytes/write");
2105 ui_out_text (uiout
, ".\n");
2108 /* This function allows the addition of incrementally linked object files.
2109 It does not modify any state in the target, only in the debugger. */
2110 /* Note: ezannoni 2000-04-13 This function/command used to have a
2111 special case syntax for the rombug target (Rombug is the boot
2112 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2113 rombug case, the user doesn't need to supply a text address,
2114 instead a call to target_link() (in target.c) would supply the
2115 value to use. We are now discontinuing this type of ad hoc syntax. */
2118 add_symbol_file_command (char *args
, int from_tty
)
2120 struct gdbarch
*gdbarch
= get_current_arch ();
2121 char *filename
= NULL
;
2122 int flags
= OBJF_USERLOADED
;
2124 int expecting_option
= 0;
2125 int section_index
= 0;
2129 int expecting_sec_name
= 0;
2130 int expecting_sec_addr
= 0;
2139 struct section_addr_info
*section_addrs
;
2140 struct sect_opt
*sect_opts
= NULL
;
2141 size_t num_sect_opts
= 0;
2142 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2145 sect_opts
= (struct sect_opt
*) xmalloc (num_sect_opts
2146 * sizeof (struct sect_opt
));
2151 error (_("add-symbol-file takes a file name and an address"));
2153 argv
= gdb_buildargv (args
);
2154 make_cleanup_freeargv (argv
);
2156 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2158 /* Process the argument. */
2161 /* The first argument is the file name. */
2162 filename
= tilde_expand (arg
);
2163 make_cleanup (xfree
, filename
);
2168 /* The second argument is always the text address at which
2169 to load the program. */
2170 sect_opts
[section_index
].name
= ".text";
2171 sect_opts
[section_index
].value
= arg
;
2172 if (++section_index
>= num_sect_opts
)
2175 sect_opts
= ((struct sect_opt
*)
2176 xrealloc (sect_opts
,
2178 * sizeof (struct sect_opt
)));
2183 /* It's an option (starting with '-') or it's an argument
2188 if (strcmp (arg
, "-readnow") == 0)
2189 flags
|= OBJF_READNOW
;
2190 else if (strcmp (arg
, "-s") == 0)
2192 expecting_sec_name
= 1;
2193 expecting_sec_addr
= 1;
2198 if (expecting_sec_name
)
2200 sect_opts
[section_index
].name
= arg
;
2201 expecting_sec_name
= 0;
2204 if (expecting_sec_addr
)
2206 sect_opts
[section_index
].value
= arg
;
2207 expecting_sec_addr
= 0;
2208 if (++section_index
>= num_sect_opts
)
2211 sect_opts
= ((struct sect_opt
*)
2212 xrealloc (sect_opts
,
2214 * sizeof (struct sect_opt
)));
2218 error (_("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*"));
2223 /* This command takes at least two arguments. The first one is a
2224 filename, and the second is the address where this file has been
2225 loaded. Abort now if this address hasn't been provided by the
2227 if (section_index
< 1)
2228 error (_("The address where %s has been loaded is missing"), filename
);
2230 /* Print the prompt for the query below. And save the arguments into
2231 a sect_addr_info structure to be passed around to other
2232 functions. We have to split this up into separate print
2233 statements because hex_string returns a local static
2236 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename
);
2237 section_addrs
= alloc_section_addr_info (section_index
);
2238 make_cleanup (xfree
, section_addrs
);
2239 for (i
= 0; i
< section_index
; i
++)
2242 char *val
= sect_opts
[i
].value
;
2243 char *sec
= sect_opts
[i
].name
;
2245 addr
= parse_and_eval_address (val
);
2247 /* Here we store the section offsets in the order they were
2248 entered on the command line. */
2249 section_addrs
->other
[sec_num
].name
= sec
;
2250 section_addrs
->other
[sec_num
].addr
= addr
;
2251 printf_unfiltered ("\t%s_addr = %s\n", sec
,
2252 paddress (gdbarch
, addr
));
2255 /* The object's sections are initialized when a
2256 call is made to build_objfile_section_table (objfile).
2257 This happens in reread_symbols.
2258 At this point, we don't know what file type this is,
2259 so we can't determine what section names are valid. */
2262 if (from_tty
&& (!query ("%s", "")))
2263 error (_("Not confirmed."));
2265 symbol_file_add (filename
, from_tty
? SYMFILE_VERBOSE
: 0,
2266 section_addrs
, flags
);
2268 /* Getting new symbols may change our opinion about what is
2270 reinit_frame_cache ();
2271 do_cleanups (my_cleanups
);
2275 /* Re-read symbols if a symbol-file has changed. */
2277 reread_symbols (void)
2279 struct objfile
*objfile
;
2282 struct stat new_statbuf
;
2285 /* With the addition of shared libraries, this should be modified,
2286 the load time should be saved in the partial symbol tables, since
2287 different tables may come from different source files. FIXME.
2288 This routine should then walk down each partial symbol table
2289 and see if the symbol table that it originates from has been changed */
2291 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2295 #ifdef DEPRECATED_IBM6000_TARGET
2296 /* If this object is from a shared library, then you should
2297 stat on the library name, not member name. */
2299 if (objfile
->obfd
->my_archive
)
2300 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2303 res
= stat (objfile
->name
, &new_statbuf
);
2306 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2307 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2311 new_modtime
= new_statbuf
.st_mtime
;
2312 if (new_modtime
!= objfile
->mtime
)
2314 struct cleanup
*old_cleanups
;
2315 struct section_offsets
*offsets
;
2317 char *obfd_filename
;
2319 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2322 /* There are various functions like symbol_file_add,
2323 symfile_bfd_open, syms_from_objfile, etc., which might
2324 appear to do what we want. But they have various other
2325 effects which we *don't* want. So we just do stuff
2326 ourselves. We don't worry about mapped files (for one thing,
2327 any mapped file will be out of date). */
2329 /* If we get an error, blow away this objfile (not sure if
2330 that is the correct response for things like shared
2332 old_cleanups
= make_cleanup_free_objfile (objfile
);
2333 /* We need to do this whenever any symbols go away. */
2334 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2336 if (exec_bfd
!= NULL
&& strcmp (bfd_get_filename (objfile
->obfd
),
2337 bfd_get_filename (exec_bfd
)) == 0)
2339 /* Reload EXEC_BFD without asking anything. */
2341 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2344 /* Clean up any state BFD has sitting around. We don't need
2345 to close the descriptor but BFD lacks a way of closing the
2346 BFD without closing the descriptor. */
2347 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2348 if (!bfd_close (objfile
->obfd
))
2349 error (_("Can't close BFD for %s: %s"), objfile
->name
,
2350 bfd_errmsg (bfd_get_error ()));
2351 if (remote_filename_p (obfd_filename
))
2352 objfile
->obfd
= remote_bfd_open (obfd_filename
, gnutarget
);
2354 objfile
->obfd
= bfd_openr (obfd_filename
, gnutarget
);
2355 if (objfile
->obfd
== NULL
)
2356 error (_("Can't open %s to read symbols."), objfile
->name
);
2358 objfile
->obfd
= gdb_bfd_ref (objfile
->obfd
);
2359 /* bfd_openr sets cacheable to true, which is what we want. */
2360 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2361 error (_("Can't read symbols from %s: %s."), objfile
->name
,
2362 bfd_errmsg (bfd_get_error ()));
2364 /* Save the offsets, we will nuke them with the rest of the
2366 num_offsets
= objfile
->num_sections
;
2367 offsets
= ((struct section_offsets
*)
2368 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2369 memcpy (offsets
, objfile
->section_offsets
,
2370 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2372 /* Remove any references to this objfile in the global
2374 preserve_values (objfile
);
2376 /* Nuke all the state that we will re-read. Much of the following
2377 code which sets things to NULL really is necessary to tell
2378 other parts of GDB that there is nothing currently there.
2380 Try to keep the freeing order compatible with free_objfile. */
2382 if (objfile
->sf
!= NULL
)
2384 (*objfile
->sf
->sym_finish
) (objfile
);
2387 clear_objfile_data (objfile
);
2389 /* FIXME: Do we have to free a whole linked list, or is this
2391 if (objfile
->global_psymbols
.list
)
2392 xfree (objfile
->global_psymbols
.list
);
2393 memset (&objfile
->global_psymbols
, 0,
2394 sizeof (objfile
->global_psymbols
));
2395 if (objfile
->static_psymbols
.list
)
2396 xfree (objfile
->static_psymbols
.list
);
2397 memset (&objfile
->static_psymbols
, 0,
2398 sizeof (objfile
->static_psymbols
));
2400 /* Free the obstacks for non-reusable objfiles */
2401 bcache_xfree (objfile
->psymbol_cache
);
2402 objfile
->psymbol_cache
= bcache_xmalloc ();
2403 bcache_xfree (objfile
->macro_cache
);
2404 objfile
->macro_cache
= bcache_xmalloc ();
2405 bcache_xfree (objfile
->filename_cache
);
2406 objfile
->filename_cache
= bcache_xmalloc ();
2407 if (objfile
->demangled_names_hash
!= NULL
)
2409 htab_delete (objfile
->demangled_names_hash
);
2410 objfile
->demangled_names_hash
= NULL
;
2412 obstack_free (&objfile
->objfile_obstack
, 0);
2413 objfile
->sections
= NULL
;
2414 objfile
->symtabs
= NULL
;
2415 objfile
->psymtabs
= NULL
;
2416 objfile
->psymtabs_addrmap
= NULL
;
2417 objfile
->free_psymtabs
= NULL
;
2418 objfile
->cp_namespace_symtab
= NULL
;
2419 objfile
->msymbols
= NULL
;
2420 objfile
->deprecated_sym_private
= NULL
;
2421 objfile
->minimal_symbol_count
= 0;
2422 memset (&objfile
->msymbol_hash
, 0,
2423 sizeof (objfile
->msymbol_hash
));
2424 memset (&objfile
->msymbol_demangled_hash
, 0,
2425 sizeof (objfile
->msymbol_demangled_hash
));
2427 objfile
->psymbol_cache
= bcache_xmalloc ();
2428 objfile
->macro_cache
= bcache_xmalloc ();
2429 objfile
->filename_cache
= bcache_xmalloc ();
2430 /* obstack_init also initializes the obstack so it is
2431 empty. We could use obstack_specify_allocation but
2432 gdb_obstack.h specifies the alloc/dealloc
2434 obstack_init (&objfile
->objfile_obstack
);
2435 if (build_objfile_section_table (objfile
))
2437 error (_("Can't find the file sections in `%s': %s"),
2438 objfile
->name
, bfd_errmsg (bfd_get_error ()));
2440 terminate_minimal_symbol_table (objfile
);
2442 /* We use the same section offsets as from last time. I'm not
2443 sure whether that is always correct for shared libraries. */
2444 objfile
->section_offsets
= (struct section_offsets
*)
2445 obstack_alloc (&objfile
->objfile_obstack
,
2446 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2447 memcpy (objfile
->section_offsets
, offsets
,
2448 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2449 objfile
->num_sections
= num_offsets
;
2451 /* What the hell is sym_new_init for, anyway? The concept of
2452 distinguishing between the main file and additional files
2453 in this way seems rather dubious. */
2454 if (objfile
== symfile_objfile
)
2456 (*objfile
->sf
->sym_new_init
) (objfile
);
2459 (*objfile
->sf
->sym_init
) (objfile
);
2460 clear_complaints (&symfile_complaints
, 1, 1);
2461 /* The "mainline" parameter is a hideous hack; I think leaving it
2462 zero is OK since dbxread.c also does what it needs to do if
2463 objfile->global_psymbols.size is 0. */
2464 (*objfile
->sf
->sym_read
) (objfile
, 0);
2465 if (!objfile_has_symbols (objfile
))
2468 printf_unfiltered (_("(no debugging symbols found)\n"));
2472 /* We're done reading the symbol file; finish off complaints. */
2473 clear_complaints (&symfile_complaints
, 0, 1);
2475 /* Getting new symbols may change our opinion about what is
2478 reinit_frame_cache ();
2480 /* Discard cleanups as symbol reading was successful. */
2481 discard_cleanups (old_cleanups
);
2483 /* If the mtime has changed between the time we set new_modtime
2484 and now, we *want* this to be out of date, so don't call stat
2486 objfile
->mtime
= new_modtime
;
2488 reread_separate_symbols (objfile
);
2489 init_entry_point_info (objfile
);
2496 /* Notify objfiles that we've modified objfile sections. */
2497 objfiles_changed ();
2499 clear_symtab_users ();
2500 /* At least one objfile has changed, so we can consider that
2501 the executable we're debugging has changed too. */
2502 observer_notify_executable_changed ();
2507 /* Handle separate debug info for OBJFILE, which has just been
2509 - If we had separate debug info before, but now we don't, get rid
2510 of the separated objfile.
2511 - If we didn't have separated debug info before, but now we do,
2512 read in the new separated debug info file.
2513 - If the debug link points to a different file, toss the old one
2514 and read the new one.
2515 This function does *not* handle the case where objfile is still
2516 using the same separate debug info file, but that file's timestamp
2517 has changed. That case should be handled by the loop in
2518 reread_symbols already. */
2520 reread_separate_symbols (struct objfile
*objfile
)
2523 unsigned long crc32
;
2525 /* Does the updated objfile's debug info live in a
2527 debug_file
= find_separate_debug_file (objfile
);
2529 if (objfile
->separate_debug_objfile
)
2531 /* There are two cases where we need to get rid of
2532 the old separated debug info objfile:
2533 - if the new primary objfile doesn't have
2534 separated debug info, or
2535 - if the new primary objfile has separate debug
2536 info, but it's under a different filename.
2538 If the old and new objfiles both have separate
2539 debug info, under the same filename, then we're
2540 okay --- if the separated file's contents have
2541 changed, we will have caught that when we
2542 visited it in this function's outermost
2545 || strcmp (debug_file
, objfile
->separate_debug_objfile
->name
) != 0)
2546 free_objfile (objfile
->separate_debug_objfile
);
2549 /* If the new objfile has separate debug info, and we
2550 haven't loaded it already, do so now. */
2552 && ! objfile
->separate_debug_objfile
)
2554 /* Use the same section offset table as objfile itself.
2555 Preserve the flags from objfile that make sense. */
2556 objfile
->separate_debug_objfile
2557 = (symbol_file_add_with_addrs_or_offsets
2558 (symfile_bfd_open (debug_file
),
2559 info_verbose
? SYMFILE_VERBOSE
: 0,
2560 0, /* No addr table. */
2561 objfile
->section_offsets
, objfile
->num_sections
,
2562 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
2563 | OBJF_USERLOADED
)));
2564 objfile
->separate_debug_objfile
->separate_debug_objfile_backlink
2582 static filename_language
*filename_language_table
;
2583 static int fl_table_size
, fl_table_next
;
2586 add_filename_language (char *ext
, enum language lang
)
2588 if (fl_table_next
>= fl_table_size
)
2590 fl_table_size
+= 10;
2591 filename_language_table
=
2592 xrealloc (filename_language_table
,
2593 fl_table_size
* sizeof (*filename_language_table
));
2596 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2597 filename_language_table
[fl_table_next
].lang
= lang
;
2601 static char *ext_args
;
2603 show_ext_args (struct ui_file
*file
, int from_tty
,
2604 struct cmd_list_element
*c
, const char *value
)
2606 fprintf_filtered (file
, _("\
2607 Mapping between filename extension and source language is \"%s\".\n"),
2612 set_ext_lang_command (char *args
, int from_tty
, struct cmd_list_element
*e
)
2615 char *cp
= ext_args
;
2618 /* First arg is filename extension, starting with '.' */
2620 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2622 /* Find end of first arg. */
2623 while (*cp
&& !isspace (*cp
))
2627 error (_("'%s': two arguments required -- filename extension and language"),
2630 /* Null-terminate first arg */
2633 /* Find beginning of second arg, which should be a source language. */
2634 while (*cp
&& isspace (*cp
))
2638 error (_("'%s': two arguments required -- filename extension and language"),
2641 /* Lookup the language from among those we know. */
2642 lang
= language_enum (cp
);
2644 /* Now lookup the filename extension: do we already know it? */
2645 for (i
= 0; i
< fl_table_next
; i
++)
2646 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2649 if (i
>= fl_table_next
)
2651 /* new file extension */
2652 add_filename_language (ext_args
, lang
);
2656 /* redefining a previously known filename extension */
2659 /* query ("Really make files of type %s '%s'?", */
2660 /* ext_args, language_str (lang)); */
2662 xfree (filename_language_table
[i
].ext
);
2663 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2664 filename_language_table
[i
].lang
= lang
;
2669 info_ext_lang_command (char *args
, int from_tty
)
2673 printf_filtered (_("Filename extensions and the languages they represent:"));
2674 printf_filtered ("\n\n");
2675 for (i
= 0; i
< fl_table_next
; i
++)
2676 printf_filtered ("\t%s\t- %s\n",
2677 filename_language_table
[i
].ext
,
2678 language_str (filename_language_table
[i
].lang
));
2682 init_filename_language_table (void)
2684 if (fl_table_size
== 0) /* protect against repetition */
2688 filename_language_table
=
2689 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
2690 add_filename_language (".c", language_c
);
2691 add_filename_language (".C", language_cplus
);
2692 add_filename_language (".cc", language_cplus
);
2693 add_filename_language (".cp", language_cplus
);
2694 add_filename_language (".cpp", language_cplus
);
2695 add_filename_language (".cxx", language_cplus
);
2696 add_filename_language (".c++", language_cplus
);
2697 add_filename_language (".java", language_java
);
2698 add_filename_language (".class", language_java
);
2699 add_filename_language (".m", language_objc
);
2700 add_filename_language (".f", language_fortran
);
2701 add_filename_language (".F", language_fortran
);
2702 add_filename_language (".s", language_asm
);
2703 add_filename_language (".sx", language_asm
);
2704 add_filename_language (".S", language_asm
);
2705 add_filename_language (".pas", language_pascal
);
2706 add_filename_language (".p", language_pascal
);
2707 add_filename_language (".pp", language_pascal
);
2708 add_filename_language (".adb", language_ada
);
2709 add_filename_language (".ads", language_ada
);
2710 add_filename_language (".a", language_ada
);
2711 add_filename_language (".ada", language_ada
);
2716 deduce_language_from_filename (char *filename
)
2721 if (filename
!= NULL
)
2722 if ((cp
= strrchr (filename
, '.')) != NULL
)
2723 for (i
= 0; i
< fl_table_next
; i
++)
2724 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2725 return filename_language_table
[i
].lang
;
2727 return language_unknown
;
2732 Allocate and partly initialize a new symbol table. Return a pointer
2733 to it. error() if no space.
2735 Caller must set these fields:
2741 possibly free_named_symtabs (symtab->filename);
2745 allocate_symtab (char *filename
, struct objfile
*objfile
)
2747 struct symtab
*symtab
;
2749 symtab
= (struct symtab
*)
2750 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symtab
));
2751 memset (symtab
, 0, sizeof (*symtab
));
2752 symtab
->filename
= (char *) bcache (filename
, strlen (filename
) + 1,
2753 objfile
->filename_cache
);
2754 symtab
->fullname
= NULL
;
2755 symtab
->language
= deduce_language_from_filename (filename
);
2756 symtab
->debugformat
= "unknown";
2758 /* Hook it to the objfile it comes from */
2760 symtab
->objfile
= objfile
;
2761 symtab
->next
= objfile
->symtabs
;
2762 objfile
->symtabs
= symtab
;
2767 struct partial_symtab
*
2768 allocate_psymtab (char *filename
, struct objfile
*objfile
)
2770 struct partial_symtab
*psymtab
;
2772 if (objfile
->free_psymtabs
)
2774 psymtab
= objfile
->free_psymtabs
;
2775 objfile
->free_psymtabs
= psymtab
->next
;
2778 psymtab
= (struct partial_symtab
*)
2779 obstack_alloc (&objfile
->objfile_obstack
,
2780 sizeof (struct partial_symtab
));
2782 memset (psymtab
, 0, sizeof (struct partial_symtab
));
2783 psymtab
->filename
= (char *) bcache (filename
, strlen (filename
) + 1,
2784 objfile
->filename_cache
);
2785 psymtab
->symtab
= NULL
;
2787 /* Prepend it to the psymtab list for the objfile it belongs to.
2788 Psymtabs are searched in most recent inserted -> least recent
2791 psymtab
->objfile
= objfile
;
2792 psymtab
->next
= objfile
->psymtabs
;
2793 objfile
->psymtabs
= psymtab
;
2796 struct partial_symtab
**prev_pst
;
2797 psymtab
->objfile
= objfile
;
2798 psymtab
->next
= NULL
;
2799 prev_pst
= &(objfile
->psymtabs
);
2800 while ((*prev_pst
) != NULL
)
2801 prev_pst
= &((*prev_pst
)->next
);
2802 (*prev_pst
) = psymtab
;
2810 discard_psymtab (struct partial_symtab
*pst
)
2812 struct partial_symtab
**prev_pst
;
2815 Empty psymtabs happen as a result of header files which don't
2816 have any symbols in them. There can be a lot of them. But this
2817 check is wrong, in that a psymtab with N_SLINE entries but
2818 nothing else is not empty, but we don't realize that. Fixing
2819 that without slowing things down might be tricky. */
2821 /* First, snip it out of the psymtab chain */
2823 prev_pst
= &(pst
->objfile
->psymtabs
);
2824 while ((*prev_pst
) != pst
)
2825 prev_pst
= &((*prev_pst
)->next
);
2826 (*prev_pst
) = pst
->next
;
2828 /* Next, put it on a free list for recycling */
2830 pst
->next
= pst
->objfile
->free_psymtabs
;
2831 pst
->objfile
->free_psymtabs
= pst
;
2835 /* Reset all data structures in gdb which may contain references to symbol
2839 clear_symtab_users (void)
2841 /* Someday, we should do better than this, by only blowing away
2842 the things that really need to be blown. */
2844 /* Clear the "current" symtab first, because it is no longer valid.
2845 breakpoint_re_set may try to access the current symtab. */
2846 clear_current_source_symtab_and_line ();
2849 breakpoint_re_set ();
2850 set_default_breakpoint (0, NULL
, 0, 0, 0);
2851 clear_pc_function_cache ();
2852 observer_notify_new_objfile (NULL
);
2854 /* Clear globals which might have pointed into a removed objfile.
2855 FIXME: It's not clear which of these are supposed to persist
2856 between expressions and which ought to be reset each time. */
2857 expression_context_block
= NULL
;
2858 innermost_block
= NULL
;
2860 /* Varobj may refer to old symbols, perform a cleanup. */
2861 varobj_invalidate ();
2866 clear_symtab_users_cleanup (void *ignore
)
2868 clear_symtab_users ();
2871 /* clear_symtab_users_once:
2873 This function is run after symbol reading, or from a cleanup.
2874 If an old symbol table was obsoleted, the old symbol table
2875 has been blown away, but the other GDB data structures that may
2876 reference it have not yet been cleared or re-directed. (The old
2877 symtab was zapped, and the cleanup queued, in free_named_symtab()
2880 This function can be queued N times as a cleanup, or called
2881 directly; it will do all the work the first time, and then will be a
2882 no-op until the next time it is queued. This works by bumping a
2883 counter at queueing time. Much later when the cleanup is run, or at
2884 the end of symbol processing (in case the cleanup is discarded), if
2885 the queued count is greater than the "done-count", we do the work
2886 and set the done-count to the queued count. If the queued count is
2887 less than or equal to the done-count, we just ignore the call. This
2888 is needed because reading a single .o file will often replace many
2889 symtabs (one per .h file, for example), and we don't want to reset
2890 the breakpoints N times in the user's face.
2892 The reason we both queue a cleanup, and call it directly after symbol
2893 reading, is because the cleanup protects us in case of errors, but is
2894 discarded if symbol reading is successful. */
2897 /* FIXME: As free_named_symtabs is currently a big noop this function
2898 is no longer needed. */
2899 static void clear_symtab_users_once (void);
2901 static int clear_symtab_users_queued
;
2902 static int clear_symtab_users_done
;
2905 clear_symtab_users_once (void)
2907 /* Enforce once-per-`do_cleanups'-semantics */
2908 if (clear_symtab_users_queued
<= clear_symtab_users_done
)
2910 clear_symtab_users_done
= clear_symtab_users_queued
;
2912 clear_symtab_users ();
2916 /* Delete the specified psymtab, and any others that reference it. */
2919 cashier_psymtab (struct partial_symtab
*pst
)
2921 struct partial_symtab
*ps
, *pprev
= NULL
;
2924 /* Find its previous psymtab in the chain */
2925 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2934 /* Unhook it from the chain. */
2935 if (ps
== pst
->objfile
->psymtabs
)
2936 pst
->objfile
->psymtabs
= ps
->next
;
2938 pprev
->next
= ps
->next
;
2940 /* FIXME, we can't conveniently deallocate the entries in the
2941 partial_symbol lists (global_psymbols/static_psymbols) that
2942 this psymtab points to. These just take up space until all
2943 the psymtabs are reclaimed. Ditto the dependencies list and
2944 filename, which are all in the objfile_obstack. */
2946 /* We need to cashier any psymtab that has this one as a dependency... */
2948 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2950 for (i
= 0; i
< ps
->number_of_dependencies
; i
++)
2952 if (ps
->dependencies
[i
] == pst
)
2954 cashier_psymtab (ps
);
2955 goto again
; /* Must restart, chain has been munged. */
2962 /* If a symtab or psymtab for filename NAME is found, free it along
2963 with any dependent breakpoints, displays, etc.
2964 Used when loading new versions of object modules with the "add-file"
2965 command. This is only called on the top-level symtab or psymtab's name;
2966 it is not called for subsidiary files such as .h files.
2968 Return value is 1 if we blew away the environment, 0 if not.
2969 FIXME. The return value appears to never be used.
2971 FIXME. I think this is not the best way to do this. We should
2972 work on being gentler to the environment while still cleaning up
2973 all stray pointers into the freed symtab. */
2976 free_named_symtabs (char *name
)
2979 /* FIXME: With the new method of each objfile having it's own
2980 psymtab list, this function needs serious rethinking. In particular,
2981 why was it ever necessary to toss psymtabs with specific compilation
2982 unit filenames, as opposed to all psymtabs from a particular symbol
2984 Well, the answer is that some systems permit reloading of particular
2985 compilation units. We want to blow away any old info about these
2986 compilation units, regardless of which objfiles they arrived in. --gnu. */
2989 struct symtab
*prev
;
2990 struct partial_symtab
*ps
;
2991 struct blockvector
*bv
;
2994 /* We only wack things if the symbol-reload switch is set. */
2995 if (!symbol_reloading
)
2998 /* Some symbol formats have trouble providing file names... */
2999 if (name
== 0 || *name
== '\0')
3002 /* Look for a psymtab with the specified name. */
3005 for (ps
= partial_symtab_list
; ps
; ps
= ps
->next
)
3007 if (strcmp (name
, ps
->filename
) == 0)
3009 cashier_psymtab (ps
); /* Blow it away...and its little dog, too. */
3010 goto again2
; /* Must restart, chain has been munged */
3014 /* Look for a symtab with the specified name. */
3016 for (s
= symtab_list
; s
; s
= s
->next
)
3018 if (strcmp (name
, s
->filename
) == 0)
3025 if (s
== symtab_list
)
3026 symtab_list
= s
->next
;
3028 prev
->next
= s
->next
;
3030 /* For now, queue a delete for all breakpoints, displays, etc., whether
3031 or not they depend on the symtab being freed. This should be
3032 changed so that only those data structures affected are deleted. */
3034 /* But don't delete anything if the symtab is empty.
3035 This test is necessary due to a bug in "dbxread.c" that
3036 causes empty symtabs to be created for N_SO symbols that
3037 contain the pathname of the object file. (This problem
3038 has been fixed in GDB 3.9x). */
3040 bv
= BLOCKVECTOR (s
);
3041 if (BLOCKVECTOR_NBLOCKS (bv
) > 2
3042 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
))
3043 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)))
3045 complaint (&symfile_complaints
, _("Replacing old symbols for `%s'"),
3047 clear_symtab_users_queued
++;
3048 make_cleanup (clear_symtab_users_once
, 0);
3052 complaint (&symfile_complaints
, _("Empty symbol table found for `%s'"),
3059 /* It is still possible that some breakpoints will be affected
3060 even though no symtab was found, since the file might have
3061 been compiled without debugging, and hence not be associated
3062 with a symtab. In order to handle this correctly, we would need
3063 to keep a list of text address ranges for undebuggable files.
3064 For now, we do nothing, since this is a fairly obscure case. */
3068 /* FIXME, what about the minimal symbol table? */
3075 /* Allocate and partially fill a partial symtab. It will be
3076 completely filled at the end of the symbol list.
3078 FILENAME is the name of the symbol-file we are reading from. */
3080 struct partial_symtab
*
3081 start_psymtab_common (struct objfile
*objfile
,
3082 struct section_offsets
*section_offsets
, char *filename
,
3083 CORE_ADDR textlow
, struct partial_symbol
**global_syms
,
3084 struct partial_symbol
**static_syms
)
3086 struct partial_symtab
*psymtab
;
3088 psymtab
= allocate_psymtab (filename
, objfile
);
3089 psymtab
->section_offsets
= section_offsets
;
3090 psymtab
->textlow
= textlow
;
3091 psymtab
->texthigh
= psymtab
->textlow
; /* default */
3092 psymtab
->globals_offset
= global_syms
- objfile
->global_psymbols
.list
;
3093 psymtab
->statics_offset
= static_syms
- objfile
->static_psymbols
.list
;
3097 /* Helper function, initialises partial symbol structure and stashes
3098 it into objfile's bcache. Note that our caching mechanism will
3099 use all fields of struct partial_symbol to determine hash value of the
3100 structure. In other words, having two symbols with the same name but
3101 different domain (or address) is possible and correct. */
3103 static const struct partial_symbol
*
3104 add_psymbol_to_bcache (char *name
, int namelength
, domain_enum domain
,
3105 enum address_class
class,
3106 long val
, /* Value as a long */
3107 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
3108 enum language language
, struct objfile
*objfile
,
3111 /* psymbol is static so that there will be no uninitialized gaps in the
3112 structure which might contain random data, causing cache misses in
3114 static struct partial_symbol psymbol
;
3116 /* However, we must ensure that the entire 'value' field has been
3117 zeroed before assigning to it, because an assignment may not
3118 write the entire field. */
3119 memset (&psymbol
.ginfo
.value
, 0, sizeof (psymbol
.ginfo
.value
));
3120 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
3123 SYMBOL_VALUE (&psymbol
) = val
;
3127 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
3129 SYMBOL_SECTION (&psymbol
) = 0;
3130 SYMBOL_LANGUAGE (&psymbol
) = language
;
3131 PSYMBOL_DOMAIN (&psymbol
) = domain
;
3132 PSYMBOL_CLASS (&psymbol
) = class;
3134 SYMBOL_SET_NAMES (&psymbol
, name
, namelength
, objfile
);
3136 /* Stash the partial symbol away in the cache */
3137 return bcache_full (&psymbol
, sizeof (struct partial_symbol
),
3138 objfile
->psymbol_cache
, added
);
3141 /* Helper function, adds partial symbol to the given partial symbol
3145 append_psymbol_to_list (struct psymbol_allocation_list
*list
,
3146 const struct partial_symbol
*psym
,
3147 struct objfile
*objfile
)
3149 if (list
->next
>= list
->list
+ list
->size
)
3150 extend_psymbol_list (list
, objfile
);
3151 *list
->next
++ = (struct partial_symbol
*) psym
;
3152 OBJSTAT (objfile
, n_psyms
++);
3155 /* Add a symbol with a long value to a psymtab.
3156 Since one arg is a struct, we pass in a ptr and deref it (sigh).
3157 Return the partial symbol that has been added. */
3159 /* NOTE: carlton/2003-09-11: The reason why we return the partial
3160 symbol is so that callers can get access to the symbol's demangled
3161 name, which they don't have any cheap way to determine otherwise.
3162 (Currenly, dwarf2read.c is the only file who uses that information,
3163 though it's possible that other readers might in the future.)
3164 Elena wasn't thrilled about that, and I don't blame her, but we
3165 couldn't come up with a better way to get that information. If
3166 it's needed in other situations, we could consider breaking up
3167 SYMBOL_SET_NAMES to provide access to the demangled name lookup
3170 const struct partial_symbol
*
3171 add_psymbol_to_list (char *name
, int namelength
, domain_enum domain
,
3172 enum address_class
class,
3173 struct psymbol_allocation_list
*list
,
3174 long val
, /* Value as a long */
3175 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
3176 enum language language
, struct objfile
*objfile
)
3178 const struct partial_symbol
*psym
;
3182 /* Stash the partial symbol away in the cache */
3183 psym
= add_psymbol_to_bcache (name
, namelength
, domain
, class,
3184 val
, coreaddr
, language
, objfile
, &added
);
3186 /* Do not duplicate global partial symbols. */
3187 if (list
== &objfile
->global_psymbols
3191 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
3192 append_psymbol_to_list (list
, psym
, objfile
);
3196 /* Initialize storage for partial symbols. */
3199 init_psymbol_list (struct objfile
*objfile
, int total_symbols
)
3201 /* Free any previously allocated psymbol lists. */
3203 if (objfile
->global_psymbols
.list
)
3205 xfree (objfile
->global_psymbols
.list
);
3207 if (objfile
->static_psymbols
.list
)
3209 xfree (objfile
->static_psymbols
.list
);
3212 /* Current best guess is that approximately a twentieth
3213 of the total symbols (in a debugging file) are global or static
3216 objfile
->global_psymbols
.size
= total_symbols
/ 10;
3217 objfile
->static_psymbols
.size
= total_symbols
/ 10;
3219 if (objfile
->global_psymbols
.size
> 0)
3221 objfile
->global_psymbols
.next
=
3222 objfile
->global_psymbols
.list
= (struct partial_symbol
**)
3223 xmalloc ((objfile
->global_psymbols
.size
3224 * sizeof (struct partial_symbol
*)));
3226 if (objfile
->static_psymbols
.size
> 0)
3228 objfile
->static_psymbols
.next
=
3229 objfile
->static_psymbols
.list
= (struct partial_symbol
**)
3230 xmalloc ((objfile
->static_psymbols
.size
3231 * sizeof (struct partial_symbol
*)));
3236 The following code implements an abstraction for debugging overlay sections.
3238 The target model is as follows:
3239 1) The gnu linker will permit multiple sections to be mapped into the
3240 same VMA, each with its own unique LMA (or load address).
3241 2) It is assumed that some runtime mechanism exists for mapping the
3242 sections, one by one, from the load address into the VMA address.
3243 3) This code provides a mechanism for gdb to keep track of which
3244 sections should be considered to be mapped from the VMA to the LMA.
3245 This information is used for symbol lookup, and memory read/write.
3246 For instance, if a section has been mapped then its contents
3247 should be read from the VMA, otherwise from the LMA.
3249 Two levels of debugger support for overlays are available. One is
3250 "manual", in which the debugger relies on the user to tell it which
3251 overlays are currently mapped. This level of support is
3252 implemented entirely in the core debugger, and the information about
3253 whether a section is mapped is kept in the objfile->obj_section table.
3255 The second level of support is "automatic", and is only available if
3256 the target-specific code provides functionality to read the target's
3257 overlay mapping table, and translate its contents for the debugger
3258 (by updating the mapped state information in the obj_section tables).
3260 The interface is as follows:
3262 overlay map <name> -- tell gdb to consider this section mapped
3263 overlay unmap <name> -- tell gdb to consider this section unmapped
3264 overlay list -- list the sections that GDB thinks are mapped
3265 overlay read-target -- get the target's state of what's mapped
3266 overlay off/manual/auto -- set overlay debugging state
3267 Functional interface:
3268 find_pc_mapped_section(pc): if the pc is in the range of a mapped
3269 section, return that section.
3270 find_pc_overlay(pc): find any overlay section that contains
3271 the pc, either in its VMA or its LMA
3272 section_is_mapped(sect): true if overlay is marked as mapped
3273 section_is_overlay(sect): true if section's VMA != LMA
3274 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
3275 pc_in_unmapped_range(...): true if pc belongs to section's LMA
3276 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
3277 overlay_mapped_address(...): map an address from section's LMA to VMA
3278 overlay_unmapped_address(...): map an address from section's VMA to LMA
3279 symbol_overlayed_address(...): Return a "current" address for symbol:
3280 either in VMA or LMA depending on whether
3281 the symbol's section is currently mapped
3284 /* Overlay debugging state: */
3286 enum overlay_debugging_state overlay_debugging
= ovly_off
;
3287 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
3289 /* Function: section_is_overlay (SECTION)
3290 Returns true if SECTION has VMA not equal to LMA, ie.
3291 SECTION is loaded at an address different from where it will "run". */
3294 section_is_overlay (struct obj_section
*section
)
3296 if (overlay_debugging
&& section
)
3298 bfd
*abfd
= section
->objfile
->obfd
;
3299 asection
*bfd_section
= section
->the_bfd_section
;
3301 if (bfd_section_lma (abfd
, bfd_section
) != 0
3302 && bfd_section_lma (abfd
, bfd_section
)
3303 != bfd_section_vma (abfd
, bfd_section
))
3310 /* Function: overlay_invalidate_all (void)
3311 Invalidate the mapped state of all overlay sections (mark it as stale). */
3314 overlay_invalidate_all (void)
3316 struct objfile
*objfile
;
3317 struct obj_section
*sect
;
3319 ALL_OBJSECTIONS (objfile
, sect
)
3320 if (section_is_overlay (sect
))
3321 sect
->ovly_mapped
= -1;
3324 /* Function: section_is_mapped (SECTION)
3325 Returns true if section is an overlay, and is currently mapped.
3327 Access to the ovly_mapped flag is restricted to this function, so
3328 that we can do automatic update. If the global flag
3329 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
3330 overlay_invalidate_all. If the mapped state of the particular
3331 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
3334 section_is_mapped (struct obj_section
*osect
)
3336 struct gdbarch
*gdbarch
;
3338 if (osect
== 0 || !section_is_overlay (osect
))
3341 switch (overlay_debugging
)
3345 return 0; /* overlay debugging off */
3346 case ovly_auto
: /* overlay debugging automatic */
3347 /* Unles there is a gdbarch_overlay_update function,
3348 there's really nothing useful to do here (can't really go auto) */
3349 gdbarch
= get_objfile_arch (osect
->objfile
);
3350 if (gdbarch_overlay_update_p (gdbarch
))
3352 if (overlay_cache_invalid
)
3354 overlay_invalidate_all ();
3355 overlay_cache_invalid
= 0;
3357 if (osect
->ovly_mapped
== -1)
3358 gdbarch_overlay_update (gdbarch
, osect
);
3360 /* fall thru to manual case */
3361 case ovly_on
: /* overlay debugging manual */
3362 return osect
->ovly_mapped
== 1;
3366 /* Function: pc_in_unmapped_range
3367 If PC falls into the lma range of SECTION, return true, else false. */
3370 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3372 if (section_is_overlay (section
))
3374 bfd
*abfd
= section
->objfile
->obfd
;
3375 asection
*bfd_section
= section
->the_bfd_section
;
3377 /* We assume the LMA is relocated by the same offset as the VMA. */
3378 bfd_vma size
= bfd_get_section_size (bfd_section
);
3379 CORE_ADDR offset
= obj_section_offset (section
);
3381 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
3382 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
3389 /* Function: pc_in_mapped_range
3390 If PC falls into the vma range of SECTION, return true, else false. */
3393 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3395 if (section_is_overlay (section
))
3397 if (obj_section_addr (section
) <= pc
3398 && pc
< obj_section_endaddr (section
))
3406 /* Return true if the mapped ranges of sections A and B overlap, false
3409 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
3411 CORE_ADDR a_start
= obj_section_addr (a
);
3412 CORE_ADDR a_end
= obj_section_endaddr (a
);
3413 CORE_ADDR b_start
= obj_section_addr (b
);
3414 CORE_ADDR b_end
= obj_section_endaddr (b
);
3416 return (a_start
< b_end
&& b_start
< a_end
);
3419 /* Function: overlay_unmapped_address (PC, SECTION)
3420 Returns the address corresponding to PC in the unmapped (load) range.
3421 May be the same as PC. */
3424 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3426 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
3428 bfd
*abfd
= section
->objfile
->obfd
;
3429 asection
*bfd_section
= section
->the_bfd_section
;
3431 return pc
+ bfd_section_lma (abfd
, bfd_section
)
3432 - bfd_section_vma (abfd
, bfd_section
);
3438 /* Function: overlay_mapped_address (PC, SECTION)
3439 Returns the address corresponding to PC in the mapped (runtime) range.
3440 May be the same as PC. */
3443 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3445 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3447 bfd
*abfd
= section
->objfile
->obfd
;
3448 asection
*bfd_section
= section
->the_bfd_section
;
3450 return pc
+ bfd_section_vma (abfd
, bfd_section
)
3451 - bfd_section_lma (abfd
, bfd_section
);
3458 /* Function: symbol_overlayed_address
3459 Return one of two addresses (relative to the VMA or to the LMA),
3460 depending on whether the section is mapped or not. */
3463 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3465 if (overlay_debugging
)
3467 /* If the symbol has no section, just return its regular address. */
3470 /* If the symbol's section is not an overlay, just return its address */
3471 if (!section_is_overlay (section
))
3473 /* If the symbol's section is mapped, just return its address */
3474 if (section_is_mapped (section
))
3477 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3478 * then return its LOADED address rather than its vma address!!
3480 return overlay_unmapped_address (address
, section
);
3485 /* Function: find_pc_overlay (PC)
3486 Return the best-match overlay section for PC:
3487 If PC matches a mapped overlay section's VMA, return that section.
3488 Else if PC matches an unmapped section's VMA, return that section.
3489 Else if PC matches an unmapped section's LMA, return that section. */
3491 struct obj_section
*
3492 find_pc_overlay (CORE_ADDR pc
)
3494 struct objfile
*objfile
;
3495 struct obj_section
*osect
, *best_match
= NULL
;
3497 if (overlay_debugging
)
3498 ALL_OBJSECTIONS (objfile
, osect
)
3499 if (section_is_overlay (osect
))
3501 if (pc_in_mapped_range (pc
, osect
))
3503 if (section_is_mapped (osect
))
3508 else if (pc_in_unmapped_range (pc
, osect
))
3514 /* Function: find_pc_mapped_section (PC)
3515 If PC falls into the VMA address range of an overlay section that is
3516 currently marked as MAPPED, return that section. Else return NULL. */
3518 struct obj_section
*
3519 find_pc_mapped_section (CORE_ADDR pc
)
3521 struct objfile
*objfile
;
3522 struct obj_section
*osect
;
3524 if (overlay_debugging
)
3525 ALL_OBJSECTIONS (objfile
, osect
)
3526 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3532 /* Function: list_overlays_command
3533 Print a list of mapped sections and their PC ranges */
3536 list_overlays_command (char *args
, int from_tty
)
3539 struct objfile
*objfile
;
3540 struct obj_section
*osect
;
3542 if (overlay_debugging
)
3543 ALL_OBJSECTIONS (objfile
, osect
)
3544 if (section_is_mapped (osect
))
3546 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3551 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3552 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3553 size
= bfd_get_section_size (osect
->the_bfd_section
);
3554 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3556 printf_filtered ("Section %s, loaded at ", name
);
3557 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3558 puts_filtered (" - ");
3559 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3560 printf_filtered (", mapped at ");
3561 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3562 puts_filtered (" - ");
3563 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3564 puts_filtered ("\n");
3569 printf_filtered (_("No sections are mapped.\n"));
3572 /* Function: map_overlay_command
3573 Mark the named section as mapped (ie. residing at its VMA address). */
3576 map_overlay_command (char *args
, int from_tty
)
3578 struct objfile
*objfile
, *objfile2
;
3579 struct obj_section
*sec
, *sec2
;
3581 if (!overlay_debugging
)
3583 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3584 the 'overlay manual' command."));
3586 if (args
== 0 || *args
== 0)
3587 error (_("Argument required: name of an overlay section"));
3589 /* First, find a section matching the user supplied argument */
3590 ALL_OBJSECTIONS (objfile
, sec
)
3591 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3593 /* Now, check to see if the section is an overlay. */
3594 if (!section_is_overlay (sec
))
3595 continue; /* not an overlay section */
3597 /* Mark the overlay as "mapped" */
3598 sec
->ovly_mapped
= 1;
3600 /* Next, make a pass and unmap any sections that are
3601 overlapped by this new section: */
3602 ALL_OBJSECTIONS (objfile2
, sec2
)
3603 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
, sec2
))
3606 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3607 bfd_section_name (objfile
->obfd
,
3608 sec2
->the_bfd_section
));
3609 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
3613 error (_("No overlay section called %s"), args
);
3616 /* Function: unmap_overlay_command
3617 Mark the overlay section as unmapped
3618 (ie. resident in its LMA address range, rather than the VMA range). */
3621 unmap_overlay_command (char *args
, int from_tty
)
3623 struct objfile
*objfile
;
3624 struct obj_section
*sec
;
3626 if (!overlay_debugging
)
3628 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3629 the 'overlay manual' command."));
3631 if (args
== 0 || *args
== 0)
3632 error (_("Argument required: name of an overlay section"));
3634 /* First, find a section matching the user supplied argument */
3635 ALL_OBJSECTIONS (objfile
, sec
)
3636 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3638 if (!sec
->ovly_mapped
)
3639 error (_("Section %s is not mapped"), args
);
3640 sec
->ovly_mapped
= 0;
3643 error (_("No overlay section called %s"), args
);
3646 /* Function: overlay_auto_command
3647 A utility command to turn on overlay debugging.
3648 Possibly this should be done via a set/show command. */
3651 overlay_auto_command (char *args
, int from_tty
)
3653 overlay_debugging
= ovly_auto
;
3654 enable_overlay_breakpoints ();
3656 printf_unfiltered (_("Automatic overlay debugging enabled."));
3659 /* Function: overlay_manual_command
3660 A utility command to turn on overlay debugging.
3661 Possibly this should be done via a set/show command. */
3664 overlay_manual_command (char *args
, int from_tty
)
3666 overlay_debugging
= ovly_on
;
3667 disable_overlay_breakpoints ();
3669 printf_unfiltered (_("Overlay debugging enabled."));
3672 /* Function: overlay_off_command
3673 A utility command to turn on overlay debugging.
3674 Possibly this should be done via a set/show command. */
3677 overlay_off_command (char *args
, int from_tty
)
3679 overlay_debugging
= ovly_off
;
3680 disable_overlay_breakpoints ();
3682 printf_unfiltered (_("Overlay debugging disabled."));
3686 overlay_load_command (char *args
, int from_tty
)
3688 struct gdbarch
*gdbarch
= get_current_arch ();
3690 if (gdbarch_overlay_update_p (gdbarch
))
3691 gdbarch_overlay_update (gdbarch
, NULL
);
3693 error (_("This target does not know how to read its overlay state."));
3696 /* Function: overlay_command
3697 A place-holder for a mis-typed command */
3699 /* Command list chain containing all defined "overlay" subcommands. */
3700 struct cmd_list_element
*overlaylist
;
3703 overlay_command (char *args
, int from_tty
)
3706 ("\"overlay\" must be followed by the name of an overlay command.\n");
3707 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3711 /* Target Overlays for the "Simplest" overlay manager:
3713 This is GDB's default target overlay layer. It works with the
3714 minimal overlay manager supplied as an example by Cygnus. The
3715 entry point is via a function pointer "gdbarch_overlay_update",
3716 so targets that use a different runtime overlay manager can
3717 substitute their own overlay_update function and take over the
3720 The overlay_update function pokes around in the target's data structures
3721 to see what overlays are mapped, and updates GDB's overlay mapping with
3724 In this simple implementation, the target data structures are as follows:
3725 unsigned _novlys; /# number of overlay sections #/
3726 unsigned _ovly_table[_novlys][4] = {
3727 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3728 {..., ..., ..., ...},
3730 unsigned _novly_regions; /# number of overlay regions #/
3731 unsigned _ovly_region_table[_novly_regions][3] = {
3732 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3735 These functions will attempt to update GDB's mappedness state in the
3736 symbol section table, based on the target's mappedness state.
3738 To do this, we keep a cached copy of the target's _ovly_table, and
3739 attempt to detect when the cached copy is invalidated. The main
3740 entry point is "simple_overlay_update(SECT), which looks up SECT in
3741 the cached table and re-reads only the entry for that section from
3742 the target (whenever possible).
3745 /* Cached, dynamically allocated copies of the target data structures: */
3746 static unsigned (*cache_ovly_table
)[4] = 0;
3748 static unsigned (*cache_ovly_region_table
)[3] = 0;
3750 static unsigned cache_novlys
= 0;
3752 static unsigned cache_novly_regions
= 0;
3754 static CORE_ADDR cache_ovly_table_base
= 0;
3756 static CORE_ADDR cache_ovly_region_table_base
= 0;
3760 VMA
, SIZE
, LMA
, MAPPED
3763 /* Throw away the cached copy of _ovly_table */
3765 simple_free_overlay_table (void)
3767 if (cache_ovly_table
)
3768 xfree (cache_ovly_table
);
3770 cache_ovly_table
= NULL
;
3771 cache_ovly_table_base
= 0;
3775 /* Throw away the cached copy of _ovly_region_table */
3777 simple_free_overlay_region_table (void)
3779 if (cache_ovly_region_table
)
3780 xfree (cache_ovly_region_table
);
3781 cache_novly_regions
= 0;
3782 cache_ovly_region_table
= NULL
;
3783 cache_ovly_region_table_base
= 0;
3787 /* Read an array of ints of size SIZE from the target into a local buffer.
3788 Convert to host order. int LEN is number of ints */
3790 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3791 int len
, int size
, enum bfd_endian byte_order
)
3793 /* FIXME (alloca): Not safe if array is very large. */
3794 gdb_byte
*buf
= alloca (len
* size
);
3797 read_memory (memaddr
, buf
, len
* size
);
3798 for (i
= 0; i
< len
; i
++)
3799 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3802 /* Find and grab a copy of the target _ovly_table
3803 (and _novlys, which is needed for the table's size) */
3805 simple_read_overlay_table (void)
3807 struct minimal_symbol
*novlys_msym
, *ovly_table_msym
;
3808 struct gdbarch
*gdbarch
;
3810 enum bfd_endian byte_order
;
3812 simple_free_overlay_table ();
3813 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3816 error (_("Error reading inferior's overlay table: "
3817 "couldn't find `_novlys' variable\n"
3818 "in inferior. Use `overlay manual' mode."));
3822 ovly_table_msym
= lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3823 if (! ovly_table_msym
)
3825 error (_("Error reading inferior's overlay table: couldn't find "
3826 "`_ovly_table' array\n"
3827 "in inferior. Use `overlay manual' mode."));
3831 gdbarch
= get_objfile_arch (msymbol_objfile (ovly_table_msym
));
3832 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3833 byte_order
= gdbarch_byte_order (gdbarch
);
3835 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
),
3838 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3839 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3840 read_target_long_array (cache_ovly_table_base
,
3841 (unsigned int *) cache_ovly_table
,
3842 cache_novlys
* 4, word_size
, byte_order
);
3844 return 1; /* SUCCESS */
3848 /* Find and grab a copy of the target _ovly_region_table
3849 (and _novly_regions, which is needed for the table's size) */
3851 simple_read_overlay_region_table (void)
3853 struct minimal_symbol
*msym
;
3854 struct gdbarch
*gdbarch
;
3856 enum bfd_endian byte_order
;
3858 simple_free_overlay_region_table ();
3859 msym
= lookup_minimal_symbol ("_novly_regions", NULL
, NULL
);
3861 return 0; /* failure */
3863 gdbarch
= get_objfile_arch (msymbol_objfile (msym
));
3864 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3865 byte_order
= gdbarch_byte_order (gdbarch
);
3867 cache_novly_regions
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
),
3870 cache_ovly_region_table
= (void *) xmalloc (cache_novly_regions
* 12);
3871 if (cache_ovly_region_table
!= NULL
)
3873 msym
= lookup_minimal_symbol ("_ovly_region_table", NULL
, NULL
);
3876 cache_ovly_region_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3877 read_target_long_array (cache_ovly_region_table_base
,
3878 (unsigned int *) cache_ovly_region_table
,
3879 cache_novly_regions
* 3,
3880 word_size
, byte_order
);
3883 return 0; /* failure */
3886 return 0; /* failure */
3887 return 1; /* SUCCESS */
3891 /* Function: simple_overlay_update_1
3892 A helper function for simple_overlay_update. Assuming a cached copy
3893 of _ovly_table exists, look through it to find an entry whose vma,
3894 lma and size match those of OSECT. Re-read the entry and make sure
3895 it still matches OSECT (else the table may no longer be valid).
3896 Set OSECT's mapped state to match the entry. Return: 1 for
3897 success, 0 for failure. */
3900 simple_overlay_update_1 (struct obj_section
*osect
)
3903 bfd
*obfd
= osect
->objfile
->obfd
;
3904 asection
*bsect
= osect
->the_bfd_section
;
3905 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3906 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3907 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3909 size
= bfd_get_section_size (osect
->the_bfd_section
);
3910 for (i
= 0; i
< cache_novlys
; i
++)
3911 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3912 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3913 /* && cache_ovly_table[i][SIZE] == size */ )
3915 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3916 (unsigned int *) cache_ovly_table
[i
],
3917 4, word_size
, byte_order
);
3918 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3919 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3920 /* && cache_ovly_table[i][SIZE] == size */ )
3922 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3925 else /* Warning! Warning! Target's ovly table has changed! */
3931 /* Function: simple_overlay_update
3932 If OSECT is NULL, then update all sections' mapped state
3933 (after re-reading the entire target _ovly_table).
3934 If OSECT is non-NULL, then try to find a matching entry in the
3935 cached ovly_table and update only OSECT's mapped state.
3936 If a cached entry can't be found or the cache isn't valid, then
3937 re-read the entire cache, and go ahead and update all sections. */
3940 simple_overlay_update (struct obj_section
*osect
)
3942 struct objfile
*objfile
;
3944 /* Were we given an osect to look up? NULL means do all of them. */
3946 /* Have we got a cached copy of the target's overlay table? */
3947 if (cache_ovly_table
!= NULL
)
3948 /* Does its cached location match what's currently in the symtab? */
3949 if (cache_ovly_table_base
==
3950 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL
, NULL
)))
3951 /* Then go ahead and try to look up this single section in the cache */
3952 if (simple_overlay_update_1 (osect
))
3953 /* Found it! We're done. */
3956 /* Cached table no good: need to read the entire table anew.
3957 Or else we want all the sections, in which case it's actually
3958 more efficient to read the whole table in one block anyway. */
3960 if (! simple_read_overlay_table ())
3963 /* Now may as well update all sections, even if only one was requested. */
3964 ALL_OBJSECTIONS (objfile
, osect
)
3965 if (section_is_overlay (osect
))
3968 bfd
*obfd
= osect
->objfile
->obfd
;
3969 asection
*bsect
= osect
->the_bfd_section
;
3971 size
= bfd_get_section_size (bsect
);
3972 for (i
= 0; i
< cache_novlys
; i
++)
3973 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3974 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3975 /* && cache_ovly_table[i][SIZE] == size */ )
3976 { /* obj_section matches i'th entry in ovly_table */
3977 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3978 break; /* finished with inner for loop: break out */
3983 /* Set the output sections and output offsets for section SECTP in
3984 ABFD. The relocation code in BFD will read these offsets, so we
3985 need to be sure they're initialized. We map each section to itself,
3986 with no offset; this means that SECTP->vma will be honored. */
3989 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3991 sectp
->output_section
= sectp
;
3992 sectp
->output_offset
= 0;
3995 /* Relocate the contents of a debug section SECTP in ABFD. The
3996 contents are stored in BUF if it is non-NULL, or returned in a
3997 malloc'd buffer otherwise.
3999 For some platforms and debug info formats, shared libraries contain
4000 relocations against the debug sections (particularly for DWARF-2;
4001 one affected platform is PowerPC GNU/Linux, although it depends on
4002 the version of the linker in use). Also, ELF object files naturally
4003 have unresolved relocations for their debug sections. We need to apply
4004 the relocations in order to get the locations of symbols correct.
4005 Another example that may require relocation processing, is the
4006 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
4010 symfile_relocate_debug_section (bfd
*abfd
, asection
*sectp
, bfd_byte
*buf
)
4012 /* We're only interested in sections with relocation
4014 if ((sectp
->flags
& SEC_RELOC
) == 0)
4017 /* We will handle section offsets properly elsewhere, so relocate as if
4018 all sections begin at 0. */
4019 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
4021 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
4024 struct symfile_segment_data
*
4025 get_symfile_segment_data (bfd
*abfd
)
4027 struct sym_fns
*sf
= find_sym_fns (abfd
);
4032 return sf
->sym_segments (abfd
);
4036 free_symfile_segment_data (struct symfile_segment_data
*data
)
4038 xfree (data
->segment_bases
);
4039 xfree (data
->segment_sizes
);
4040 xfree (data
->segment_info
);
4046 - DATA, containing segment addresses from the object file ABFD, and
4047 the mapping from ABFD's sections onto the segments that own them,
4049 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
4050 segment addresses reported by the target,
4051 store the appropriate offsets for each section in OFFSETS.
4053 If there are fewer entries in SEGMENT_BASES than there are segments
4054 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
4056 If there are more entries, then ignore the extra. The target may
4057 not be able to distinguish between an empty data segment and a
4058 missing data segment; a missing text segment is less plausible. */
4060 symfile_map_offsets_to_segments (bfd
*abfd
, struct symfile_segment_data
*data
,
4061 struct section_offsets
*offsets
,
4062 int num_segment_bases
,
4063 const CORE_ADDR
*segment_bases
)
4068 /* It doesn't make sense to call this function unless you have some
4069 segment base addresses. */
4070 gdb_assert (segment_bases
> 0);
4072 /* If we do not have segment mappings for the object file, we
4073 can not relocate it by segments. */
4074 gdb_assert (data
!= NULL
);
4075 gdb_assert (data
->num_segments
> 0);
4077 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
4079 int which
= data
->segment_info
[i
];
4081 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
4083 /* Don't bother computing offsets for sections that aren't
4084 loaded as part of any segment. */
4088 /* Use the last SEGMENT_BASES entry as the address of any extra
4089 segments mentioned in DATA->segment_info. */
4090 if (which
> num_segment_bases
)
4091 which
= num_segment_bases
;
4093 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
4094 - data
->segment_bases
[which
- 1]);
4101 symfile_find_segment_sections (struct objfile
*objfile
)
4103 bfd
*abfd
= objfile
->obfd
;
4106 struct symfile_segment_data
*data
;
4108 data
= get_symfile_segment_data (objfile
->obfd
);
4112 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
4114 free_symfile_segment_data (data
);
4118 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
4121 int which
= data
->segment_info
[i
];
4125 if (objfile
->sect_index_text
== -1)
4126 objfile
->sect_index_text
= sect
->index
;
4128 if (objfile
->sect_index_rodata
== -1)
4129 objfile
->sect_index_rodata
= sect
->index
;
4131 else if (which
== 2)
4133 if (objfile
->sect_index_data
== -1)
4134 objfile
->sect_index_data
= sect
->index
;
4136 if (objfile
->sect_index_bss
== -1)
4137 objfile
->sect_index_bss
= sect
->index
;
4141 free_symfile_segment_data (data
);
4145 _initialize_symfile (void)
4147 struct cmd_list_element
*c
;
4149 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
4150 Load symbol table from executable file FILE.\n\
4151 The `file' command can also load symbol tables, as well as setting the file\n\
4152 to execute."), &cmdlist
);
4153 set_cmd_completer (c
, filename_completer
);
4155 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
4156 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
4157 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
4158 ADDR is the starting address of the file's text.\n\
4159 The optional arguments are section-name section-address pairs and\n\
4160 should be specified if the data and bss segments are not contiguous\n\
4161 with the text. SECT is a section name to be loaded at SECT_ADDR."),
4163 set_cmd_completer (c
, filename_completer
);
4165 c
= add_cmd ("load", class_files
, load_command
, _("\
4166 Dynamically load FILE into the running program, and record its symbols\n\
4167 for access from GDB.\n\
4168 A load OFFSET may also be given."), &cmdlist
);
4169 set_cmd_completer (c
, filename_completer
);
4171 add_setshow_boolean_cmd ("symbol-reloading", class_support
,
4172 &symbol_reloading
, _("\
4173 Set dynamic symbol table reloading multiple times in one run."), _("\
4174 Show dynamic symbol table reloading multiple times in one run."), NULL
,
4176 show_symbol_reloading
,
4177 &setlist
, &showlist
);
4179 add_prefix_cmd ("overlay", class_support
, overlay_command
,
4180 _("Commands for debugging overlays."), &overlaylist
,
4181 "overlay ", 0, &cmdlist
);
4183 add_com_alias ("ovly", "overlay", class_alias
, 1);
4184 add_com_alias ("ov", "overlay", class_alias
, 1);
4186 add_cmd ("map-overlay", class_support
, map_overlay_command
,
4187 _("Assert that an overlay section is mapped."), &overlaylist
);
4189 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
4190 _("Assert that an overlay section is unmapped."), &overlaylist
);
4192 add_cmd ("list-overlays", class_support
, list_overlays_command
,
4193 _("List mappings of overlay sections."), &overlaylist
);
4195 add_cmd ("manual", class_support
, overlay_manual_command
,
4196 _("Enable overlay debugging."), &overlaylist
);
4197 add_cmd ("off", class_support
, overlay_off_command
,
4198 _("Disable overlay debugging."), &overlaylist
);
4199 add_cmd ("auto", class_support
, overlay_auto_command
,
4200 _("Enable automatic overlay debugging."), &overlaylist
);
4201 add_cmd ("load-target", class_support
, overlay_load_command
,
4202 _("Read the overlay mapping state from the target."), &overlaylist
);
4204 /* Filename extension to source language lookup table: */
4205 init_filename_language_table ();
4206 add_setshow_string_noescape_cmd ("extension-language", class_files
,
4208 Set mapping between filename extension and source language."), _("\
4209 Show mapping between filename extension and source language."), _("\
4210 Usage: set extension-language .foo bar"),
4211 set_ext_lang_command
,
4213 &setlist
, &showlist
);
4215 add_info ("extensions", info_ext_lang_command
,
4216 _("All filename extensions associated with a source language."));
4218 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
4219 &debug_file_directory
, _("\
4220 Set the directories where separate debug symbols are searched for."), _("\
4221 Show the directories where separate debug symbols are searched for."), _("\
4222 Separate debug symbols are first searched for in the same\n\
4223 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
4224 and lastly at the path of the directory of the binary with\n\
4225 each global debug-file-directory component prepended."),
4227 show_debug_file_directory
,
4228 &setlist
, &showlist
);