1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
4 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
6 Contributed by Cygnus Support, using pieces from other GDB modules.
8 This file is part of GDB.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 59 Temple Place - Suite 330,
23 Boston, MA 02111-1307, USA. */
37 #include "breakpoint.h"
39 #include "complaints.h"
41 #include "inferior.h" /* for write_pc */
42 #include "filenames.h" /* for DOSish file names */
43 #include "gdb-stabs.h"
44 #include "gdb_obstack.h"
45 #include "completer.h"
48 #include "readline/readline.h"
49 #include "gdb_assert.h"
52 #include <sys/types.h>
54 #include "gdb_string.h"
65 /* Some HP-UX related globals to clear when a new "main"
66 symbol file is loaded. HP-specific. */
68 extern int hp_cxx_exception_support_initialized
;
69 #define RESET_HP_UX_GLOBALS() do {\
70 deprecated_hp_som_som_object_present = 0; /* indicates HP-compiled code */ \
71 hp_cxx_exception_support_initialized = 0; /* must reinitialize exception stuff */ \
75 int (*deprecated_ui_load_progress_hook
) (const char *section
, unsigned long num
);
76 void (*deprecated_show_load_progress
) (const char *section
,
77 unsigned long section_sent
,
78 unsigned long section_size
,
79 unsigned long total_sent
,
80 unsigned long total_size
);
81 void (*pre_add_symbol_hook
) (const char *);
82 void (*post_add_symbol_hook
) (void);
83 void (*deprecated_target_new_objfile_hook
) (struct objfile
*);
85 static void clear_symtab_users_cleanup (void *ignore
);
87 /* Global variables owned by this file */
88 int readnow_symbol_files
; /* Read full symbols immediately */
90 /* External variables and functions referenced. */
92 extern void report_transfer_performance (unsigned long, time_t, time_t);
94 /* Functions this file defines */
97 static int simple_read_overlay_region_table (void);
98 static void simple_free_overlay_region_table (void);
101 static void set_initial_language (void);
103 static void load_command (char *, int);
105 static void symbol_file_add_main_1 (char *args
, int from_tty
, int flags
);
107 static void add_symbol_file_command (char *, int);
109 static void add_shared_symbol_files_command (char *, int);
111 static void reread_separate_symbols (struct objfile
*objfile
);
113 static void cashier_psymtab (struct partial_symtab
*);
115 bfd
*symfile_bfd_open (char *);
117 int get_section_index (struct objfile
*, char *);
119 static void find_sym_fns (struct objfile
*);
121 static void decrement_reading_symtab (void *);
123 static void overlay_invalidate_all (void);
125 static int overlay_is_mapped (struct obj_section
*);
127 void list_overlays_command (char *, int);
129 void map_overlay_command (char *, int);
131 void unmap_overlay_command (char *, int);
133 static void overlay_auto_command (char *, int);
135 static void overlay_manual_command (char *, int);
137 static void overlay_off_command (char *, int);
139 static void overlay_load_command (char *, int);
141 static void overlay_command (char *, int);
143 static void simple_free_overlay_table (void);
145 static void read_target_long_array (CORE_ADDR
, unsigned int *, int);
147 static int simple_read_overlay_table (void);
149 static int simple_overlay_update_1 (struct obj_section
*);
151 static void add_filename_language (char *ext
, enum language lang
);
153 static void set_ext_lang_command (char *args
, int from_tty
);
155 static void info_ext_lang_command (char *args
, int from_tty
);
157 static char *find_separate_debug_file (struct objfile
*objfile
);
159 static void init_filename_language_table (void);
161 void _initialize_symfile (void);
163 /* List of all available sym_fns. On gdb startup, each object file reader
164 calls add_symtab_fns() to register information on each format it is
167 static struct sym_fns
*symtab_fns
= NULL
;
169 /* Flag for whether user will be reloading symbols multiple times.
170 Defaults to ON for VxWorks, otherwise OFF. */
172 #ifdef SYMBOL_RELOADING_DEFAULT
173 int symbol_reloading
= SYMBOL_RELOADING_DEFAULT
;
175 int symbol_reloading
= 0;
178 /* If non-zero, shared library symbols will be added automatically
179 when the inferior is created, new libraries are loaded, or when
180 attaching to the inferior. This is almost always what users will
181 want to have happen; but for very large programs, the startup time
182 will be excessive, and so if this is a problem, the user can clear
183 this flag and then add the shared library symbols as needed. Note
184 that there is a potential for confusion, since if the shared
185 library symbols are not loaded, commands like "info fun" will *not*
186 report all the functions that are actually present. */
188 int auto_solib_add
= 1;
190 /* For systems that support it, a threshold size in megabytes. If
191 automatically adding a new library's symbol table to those already
192 known to the debugger would cause the total shared library symbol
193 size to exceed this threshhold, then the shlib's symbols are not
194 added. The threshold is ignored if the user explicitly asks for a
195 shlib to be added, such as when using the "sharedlibrary"
198 int auto_solib_limit
;
201 /* This compares two partial symbols by names, using strcmp_iw_ordered
202 for the comparison. */
205 compare_psymbols (const void *s1p
, const void *s2p
)
207 struct partial_symbol
*const *s1
= s1p
;
208 struct partial_symbol
*const *s2
= s2p
;
210 return strcmp_iw_ordered (SYMBOL_NATURAL_NAME (*s1
),
211 SYMBOL_NATURAL_NAME (*s2
));
215 sort_pst_symbols (struct partial_symtab
*pst
)
217 /* Sort the global list; don't sort the static list */
219 qsort (pst
->objfile
->global_psymbols
.list
+ pst
->globals_offset
,
220 pst
->n_global_syms
, sizeof (struct partial_symbol
*),
224 /* Make a null terminated copy of the string at PTR with SIZE characters in
225 the obstack pointed to by OBSTACKP . Returns the address of the copy.
226 Note that the string at PTR does not have to be null terminated, I.E. it
227 may be part of a larger string and we are only saving a substring. */
230 obsavestring (const char *ptr
, int size
, struct obstack
*obstackp
)
232 char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
233 /* Open-coded memcpy--saves function call time. These strings are usually
234 short. FIXME: Is this really still true with a compiler that can
237 const char *p1
= ptr
;
239 const char *end
= ptr
+ size
;
247 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
248 in the obstack pointed to by OBSTACKP. */
251 obconcat (struct obstack
*obstackp
, const char *s1
, const char *s2
,
254 int len
= strlen (s1
) + strlen (s2
) + strlen (s3
) + 1;
255 char *val
= (char *) obstack_alloc (obstackp
, len
);
262 /* True if we are nested inside psymtab_to_symtab. */
264 int currently_reading_symtab
= 0;
267 decrement_reading_symtab (void *dummy
)
269 currently_reading_symtab
--;
272 /* Get the symbol table that corresponds to a partial_symtab.
273 This is fast after the first time you do it. In fact, there
274 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
278 psymtab_to_symtab (struct partial_symtab
*pst
)
280 /* If it's been looked up before, return it. */
284 /* If it has not yet been read in, read it. */
287 struct cleanup
*back_to
= make_cleanup (decrement_reading_symtab
, NULL
);
288 currently_reading_symtab
++;
289 (*pst
->read_symtab
) (pst
);
290 do_cleanups (back_to
);
296 /* Remember the lowest-addressed loadable section we've seen.
297 This function is called via bfd_map_over_sections.
299 In case of equal vmas, the section with the largest size becomes the
300 lowest-addressed loadable section.
302 If the vmas and sizes are equal, the last section is considered the
303 lowest-addressed loadable section. */
306 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
308 asection
**lowest
= (asection
**) obj
;
310 if (0 == (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
))
313 *lowest
= sect
; /* First loadable section */
314 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
315 *lowest
= sect
; /* A lower loadable section */
316 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
317 && (bfd_section_size (abfd
, (*lowest
))
318 <= bfd_section_size (abfd
, sect
)))
322 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
324 struct section_addr_info
*
325 alloc_section_addr_info (size_t num_sections
)
327 struct section_addr_info
*sap
;
330 size
= (sizeof (struct section_addr_info
)
331 + sizeof (struct other_sections
) * (num_sections
- 1));
332 sap
= (struct section_addr_info
*) xmalloc (size
);
333 memset (sap
, 0, size
);
334 sap
->num_sections
= num_sections
;
339 /* Build (allocate and populate) a section_addr_info struct from
340 an existing section table. */
342 extern struct section_addr_info
*
343 build_section_addr_info_from_section_table (const struct section_table
*start
,
344 const struct section_table
*end
)
346 struct section_addr_info
*sap
;
347 const struct section_table
*stp
;
350 sap
= alloc_section_addr_info (end
- start
);
352 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
354 if (bfd_get_section_flags (stp
->bfd
,
355 stp
->the_bfd_section
) & (SEC_ALLOC
| SEC_LOAD
)
356 && oidx
< end
- start
)
358 sap
->other
[oidx
].addr
= stp
->addr
;
359 sap
->other
[oidx
].name
360 = xstrdup (bfd_section_name (stp
->bfd
, stp
->the_bfd_section
));
361 sap
->other
[oidx
].sectindex
= stp
->the_bfd_section
->index
;
370 /* Free all memory allocated by build_section_addr_info_from_section_table. */
373 free_section_addr_info (struct section_addr_info
*sap
)
377 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
378 if (sap
->other
[idx
].name
)
379 xfree (sap
->other
[idx
].name
);
384 /* Initialize OBJFILE's sect_index_* members. */
386 init_objfile_sect_indices (struct objfile
*objfile
)
391 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
393 objfile
->sect_index_text
= sect
->index
;
395 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
397 objfile
->sect_index_data
= sect
->index
;
399 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
401 objfile
->sect_index_bss
= sect
->index
;
403 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
405 objfile
->sect_index_rodata
= sect
->index
;
407 /* This is where things get really weird... We MUST have valid
408 indices for the various sect_index_* members or gdb will abort.
409 So if for example, there is no ".text" section, we have to
410 accomodate that. Except when explicitly adding symbol files at
411 some address, section_offsets contains nothing but zeros, so it
412 doesn't matter which slot in section_offsets the individual
413 sect_index_* members index into. So if they are all zero, it is
414 safe to just point all the currently uninitialized indices to the
417 for (i
= 0; i
< objfile
->num_sections
; i
++)
419 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
424 if (i
== objfile
->num_sections
)
426 if (objfile
->sect_index_text
== -1)
427 objfile
->sect_index_text
= 0;
428 if (objfile
->sect_index_data
== -1)
429 objfile
->sect_index_data
= 0;
430 if (objfile
->sect_index_bss
== -1)
431 objfile
->sect_index_bss
= 0;
432 if (objfile
->sect_index_rodata
== -1)
433 objfile
->sect_index_rodata
= 0;
438 /* Parse the user's idea of an offset for dynamic linking, into our idea
439 of how to represent it for fast symbol reading. This is the default
440 version of the sym_fns.sym_offsets function for symbol readers that
441 don't need to do anything special. It allocates a section_offsets table
442 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
445 default_symfile_offsets (struct objfile
*objfile
,
446 struct section_addr_info
*addrs
)
450 objfile
->num_sections
= bfd_count_sections (objfile
->obfd
);
451 objfile
->section_offsets
= (struct section_offsets
*)
452 obstack_alloc (&objfile
->objfile_obstack
,
453 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
454 memset (objfile
->section_offsets
, 0,
455 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
457 /* Now calculate offsets for section that were specified by the
459 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
461 struct other_sections
*osp
;
463 osp
= &addrs
->other
[i
] ;
467 /* Record all sections in offsets */
468 /* The section_offsets in the objfile are here filled in using
470 (objfile
->section_offsets
)->offsets
[osp
->sectindex
] = osp
->addr
;
473 /* Remember the bfd indexes for the .text, .data, .bss and
475 init_objfile_sect_indices (objfile
);
479 /* Process a symbol file, as either the main file or as a dynamically
482 OBJFILE is where the symbols are to be read from.
484 ADDRS is the list of section load addresses. If the user has given
485 an 'add-symbol-file' command, then this is the list of offsets and
486 addresses he or she provided as arguments to the command; or, if
487 we're handling a shared library, these are the actual addresses the
488 sections are loaded at, according to the inferior's dynamic linker
489 (as gleaned by GDB's shared library code). We convert each address
490 into an offset from the section VMA's as it appears in the object
491 file, and then call the file's sym_offsets function to convert this
492 into a format-specific offset table --- a `struct section_offsets'.
493 If ADDRS is non-zero, OFFSETS must be zero.
495 OFFSETS is a table of section offsets already in the right
496 format-specific representation. NUM_OFFSETS is the number of
497 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
498 assume this is the proper table the call to sym_offsets described
499 above would produce. Instead of calling sym_offsets, we just dump
500 it right into objfile->section_offsets. (When we're re-reading
501 symbols from an objfile, we don't have the original load address
502 list any more; all we have is the section offset table.) If
503 OFFSETS is non-zero, ADDRS must be zero.
505 MAINLINE is nonzero if this is the main symbol file, or zero if
506 it's an extra symbol file such as dynamically loaded code.
508 VERBO is nonzero if the caller has printed a verbose message about
509 the symbol reading (and complaints can be more terse about it). */
512 syms_from_objfile (struct objfile
*objfile
,
513 struct section_addr_info
*addrs
,
514 struct section_offsets
*offsets
,
519 struct section_addr_info
*local_addr
= NULL
;
520 struct cleanup
*old_chain
;
522 gdb_assert (! (addrs
&& offsets
));
524 init_entry_point_info (objfile
);
525 find_sym_fns (objfile
);
527 if (objfile
->sf
== NULL
)
528 return; /* No symbols. */
530 /* Make sure that partially constructed symbol tables will be cleaned up
531 if an error occurs during symbol reading. */
532 old_chain
= make_cleanup_free_objfile (objfile
);
534 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
535 list. We now establish the convention that an addr of zero means
536 no load address was specified. */
537 if (! addrs
&& ! offsets
)
540 = alloc_section_addr_info (bfd_count_sections (objfile
->obfd
));
541 make_cleanup (xfree
, local_addr
);
545 /* Now either addrs or offsets is non-zero. */
549 /* We will modify the main symbol table, make sure that all its users
550 will be cleaned up if an error occurs during symbol reading. */
551 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
553 /* Since no error yet, throw away the old symbol table. */
555 if (symfile_objfile
!= NULL
)
557 free_objfile (symfile_objfile
);
558 symfile_objfile
= NULL
;
561 /* Currently we keep symbols from the add-symbol-file command.
562 If the user wants to get rid of them, they should do "symbol-file"
563 without arguments first. Not sure this is the best behavior
566 (*objfile
->sf
->sym_new_init
) (objfile
);
569 /* Convert addr into an offset rather than an absolute address.
570 We find the lowest address of a loaded segment in the objfile,
571 and assume that <addr> is where that got loaded.
573 We no longer warn if the lowest section is not a text segment (as
574 happens for the PA64 port. */
575 if (!mainline
&& addrs
&& addrs
->other
[0].name
)
577 asection
*lower_sect
;
579 CORE_ADDR lower_offset
;
582 /* Find lowest loadable section to be used as starting point for
583 continguous sections. FIXME!! won't work without call to find
584 .text first, but this assumes text is lowest section. */
585 lower_sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
586 if (lower_sect
== NULL
)
587 bfd_map_over_sections (objfile
->obfd
, find_lowest_section
,
589 if (lower_sect
== NULL
)
590 warning ("no loadable sections found in added symbol-file %s",
593 if ((bfd_get_section_flags (objfile
->obfd
, lower_sect
) & SEC_CODE
) == 0)
594 warning ("Lowest section in %s is %s at %s",
596 bfd_section_name (objfile
->obfd
, lower_sect
),
597 paddr (bfd_section_vma (objfile
->obfd
, lower_sect
)));
598 if (lower_sect
!= NULL
)
599 lower_offset
= bfd_section_vma (objfile
->obfd
, lower_sect
);
603 /* Calculate offsets for the loadable sections.
604 FIXME! Sections must be in order of increasing loadable section
605 so that contiguous sections can use the lower-offset!!!
607 Adjust offsets if the segments are not contiguous.
608 If the section is contiguous, its offset should be set to
609 the offset of the highest loadable section lower than it
610 (the loadable section directly below it in memory).
611 this_offset = lower_offset = lower_addr - lower_orig_addr */
613 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
615 if (addrs
->other
[i
].addr
!= 0)
617 sect
= bfd_get_section_by_name (objfile
->obfd
,
618 addrs
->other
[i
].name
);
622 -= bfd_section_vma (objfile
->obfd
, sect
);
623 lower_offset
= addrs
->other
[i
].addr
;
624 /* This is the index used by BFD. */
625 addrs
->other
[i
].sectindex
= sect
->index
;
629 warning ("section %s not found in %s",
630 addrs
->other
[i
].name
,
632 addrs
->other
[i
].addr
= 0;
636 addrs
->other
[i
].addr
= lower_offset
;
640 /* Initialize symbol reading routines for this objfile, allow complaints to
641 appear for this new file, and record how verbose to be, then do the
642 initial symbol reading for this file. */
644 (*objfile
->sf
->sym_init
) (objfile
);
645 clear_complaints (&symfile_complaints
, 1, verbo
);
648 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
651 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_offsets
);
653 /* Just copy in the offset table directly as given to us. */
654 objfile
->num_sections
= num_offsets
;
655 objfile
->section_offsets
656 = ((struct section_offsets
*)
657 obstack_alloc (&objfile
->objfile_obstack
, size
));
658 memcpy (objfile
->section_offsets
, offsets
, size
);
660 init_objfile_sect_indices (objfile
);
663 #ifndef DEPRECATED_IBM6000_TARGET
664 /* This is a SVR4/SunOS specific hack, I think. In any event, it
665 screws RS/6000. sym_offsets should be doing this sort of thing,
666 because it knows the mapping between bfd sections and
668 /* This is a hack. As far as I can tell, section offsets are not
669 target dependent. They are all set to addr with a couple of
670 exceptions. The exceptions are sysvr4 shared libraries, whose
671 offsets are kept in solib structures anyway and rs6000 xcoff
672 which handles shared libraries in a completely unique way.
674 Section offsets are built similarly, except that they are built
675 by adding addr in all cases because there is no clear mapping
676 from section_offsets into actual sections. Note that solib.c
677 has a different algorithm for finding section offsets.
679 These should probably all be collapsed into some target
680 independent form of shared library support. FIXME. */
684 struct obj_section
*s
;
686 /* Map section offsets in "addr" back to the object's
687 sections by comparing the section names with bfd's
688 section names. Then adjust the section address by
689 the offset. */ /* for gdb/13815 */
691 ALL_OBJFILE_OSECTIONS (objfile
, s
)
693 CORE_ADDR s_addr
= 0;
697 !s_addr
&& i
< addrs
->num_sections
&& addrs
->other
[i
].name
;
699 if (strcmp (bfd_section_name (s
->objfile
->obfd
,
701 addrs
->other
[i
].name
) == 0)
702 s_addr
= addrs
->other
[i
].addr
; /* end added for gdb/13815 */
704 s
->addr
-= s
->offset
;
706 s
->endaddr
-= s
->offset
;
707 s
->endaddr
+= s_addr
;
711 #endif /* not DEPRECATED_IBM6000_TARGET */
713 (*objfile
->sf
->sym_read
) (objfile
, mainline
);
715 /* Don't allow char * to have a typename (else would get caddr_t).
716 Ditto void *. FIXME: Check whether this is now done by all the
717 symbol readers themselves (many of them now do), and if so remove
720 TYPE_NAME (lookup_pointer_type (builtin_type_char
)) = 0;
721 TYPE_NAME (lookup_pointer_type (builtin_type_void
)) = 0;
723 /* Mark the objfile has having had initial symbol read attempted. Note
724 that this does not mean we found any symbols... */
726 objfile
->flags
|= OBJF_SYMS
;
728 /* Discard cleanups as symbol reading was successful. */
730 discard_cleanups (old_chain
);
733 /* Perform required actions after either reading in the initial
734 symbols for a new objfile, or mapping in the symbols from a reusable
738 new_symfile_objfile (struct objfile
*objfile
, int mainline
, int verbo
)
741 /* If this is the main symbol file we have to clean up all users of the
742 old main symbol file. Otherwise it is sufficient to fixup all the
743 breakpoints that may have been redefined by this symbol file. */
746 /* OK, make it the "real" symbol file. */
747 symfile_objfile
= objfile
;
749 clear_symtab_users ();
753 breakpoint_re_set ();
756 /* We're done reading the symbol file; finish off complaints. */
757 clear_complaints (&symfile_complaints
, 0, verbo
);
760 /* Process a symbol file, as either the main file or as a dynamically
763 ABFD is a BFD already open on the file, as from symfile_bfd_open.
764 This BFD will be closed on error, and is always consumed by this function.
766 FROM_TTY says how verbose to be.
768 MAINLINE specifies whether this is the main symbol file, or whether
769 it's an extra symbol file such as dynamically loaded code.
771 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
772 syms_from_objfile, above. ADDRS is ignored when MAINLINE is
775 Upon success, returns a pointer to the objfile that was added.
776 Upon failure, jumps back to command level (never returns). */
777 static struct objfile
*
778 symbol_file_add_with_addrs_or_offsets (bfd
*abfd
, int from_tty
,
779 struct section_addr_info
*addrs
,
780 struct section_offsets
*offsets
,
782 int mainline
, int flags
)
784 struct objfile
*objfile
;
785 struct partial_symtab
*psymtab
;
787 struct section_addr_info
*orig_addrs
;
788 struct cleanup
*my_cleanups
;
789 const char *name
= bfd_get_filename (abfd
);
791 my_cleanups
= make_cleanup_bfd_close (abfd
);
793 /* Give user a chance to burp if we'd be
794 interactively wiping out any existing symbols. */
796 if ((have_full_symbols () || have_partial_symbols ())
799 && !query ("Load new symbol table from \"%s\"? ", name
))
800 error ("Not confirmed.");
802 objfile
= allocate_objfile (abfd
, flags
);
803 discard_cleanups (my_cleanups
);
805 orig_addrs
= alloc_section_addr_info (bfd_count_sections (abfd
));
806 my_cleanups
= make_cleanup (xfree
, orig_addrs
);
810 orig_addrs
->num_sections
= addrs
->num_sections
;
811 for (i
= 0; i
< addrs
->num_sections
; i
++)
812 orig_addrs
->other
[i
] = addrs
->other
[i
];
815 /* We either created a new mapped symbol table, mapped an existing
816 symbol table file which has not had initial symbol reading
817 performed, or need to read an unmapped symbol table. */
818 if (from_tty
|| info_verbose
)
820 if (pre_add_symbol_hook
)
821 pre_add_symbol_hook (name
);
824 printf_unfiltered ("Reading symbols from %s...", name
);
826 gdb_flush (gdb_stdout
);
829 syms_from_objfile (objfile
, addrs
, offsets
, num_offsets
,
832 /* We now have at least a partial symbol table. Check to see if the
833 user requested that all symbols be read on initial access via either
834 the gdb startup command line or on a per symbol file basis. Expand
835 all partial symbol tables for this objfile if so. */
837 if ((flags
& OBJF_READNOW
) || readnow_symbol_files
)
839 if (from_tty
|| info_verbose
)
841 printf_unfiltered ("expanding to full symbols...");
843 gdb_flush (gdb_stdout
);
846 for (psymtab
= objfile
->psymtabs
;
848 psymtab
= psymtab
->next
)
850 psymtab_to_symtab (psymtab
);
854 debugfile
= find_separate_debug_file (objfile
);
859 objfile
->separate_debug_objfile
860 = symbol_file_add (debugfile
, from_tty
, orig_addrs
, 0, flags
);
864 objfile
->separate_debug_objfile
865 = symbol_file_add (debugfile
, from_tty
, NULL
, 0, flags
);
867 objfile
->separate_debug_objfile
->separate_debug_objfile_backlink
870 /* Put the separate debug object before the normal one, this is so that
871 usage of the ALL_OBJFILES_SAFE macro will stay safe. */
872 put_objfile_before (objfile
->separate_debug_objfile
, objfile
);
877 if (!have_partial_symbols () && !have_full_symbols ())
880 printf_unfiltered ("(no debugging symbols found)...");
884 if (from_tty
|| info_verbose
)
886 if (post_add_symbol_hook
)
887 post_add_symbol_hook ();
890 printf_unfiltered ("done.\n");
894 /* We print some messages regardless of whether 'from_tty ||
895 info_verbose' is true, so make sure they go out at the right
897 gdb_flush (gdb_stdout
);
899 do_cleanups (my_cleanups
);
901 if (objfile
->sf
== NULL
)
902 return objfile
; /* No symbols. */
904 new_symfile_objfile (objfile
, mainline
, from_tty
);
906 if (deprecated_target_new_objfile_hook
)
907 deprecated_target_new_objfile_hook (objfile
);
913 /* Process a symbol file, as either the main file or as a dynamically
914 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
917 symbol_file_add (char *name
, int from_tty
, struct section_addr_info
*addrs
,
918 int mainline
, int flags
)
920 return symbol_file_add_with_addrs_or_offsets (symfile_bfd_open (name
),
921 from_tty
, addrs
, 0, 0,
926 /* Call symbol_file_add() with default values and update whatever is
927 affected by the loading of a new main().
928 Used when the file is supplied in the gdb command line
929 and by some targets with special loading requirements.
930 The auxiliary function, symbol_file_add_main_1(), has the flags
931 argument for the switches that can only be specified in the symbol_file
935 symbol_file_add_main (char *args
, int from_tty
)
937 symbol_file_add_main_1 (args
, from_tty
, 0);
941 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
943 symbol_file_add (args
, from_tty
, NULL
, 1, flags
);
946 RESET_HP_UX_GLOBALS ();
949 /* Getting new symbols may change our opinion about
950 what is frameless. */
951 reinit_frame_cache ();
953 set_initial_language ();
957 symbol_file_clear (int from_tty
)
959 if ((have_full_symbols () || have_partial_symbols ())
961 && !query ("Discard symbol table from `%s'? ",
962 symfile_objfile
->name
))
963 error ("Not confirmed.");
964 free_all_objfiles ();
966 /* solib descriptors may have handles to objfiles. Since their
967 storage has just been released, we'd better wipe the solib
970 #if defined(SOLIB_RESTART)
974 symfile_objfile
= NULL
;
976 printf_unfiltered ("No symbol file now.\n");
978 RESET_HP_UX_GLOBALS ();
983 get_debug_link_info (struct objfile
*objfile
, unsigned long *crc32_out
)
986 bfd_size_type debuglink_size
;
992 sect
= bfd_get_section_by_name (objfile
->obfd
, ".gnu_debuglink");
997 debuglink_size
= bfd_section_size (objfile
->obfd
, sect
);
999 contents
= xmalloc (debuglink_size
);
1000 bfd_get_section_contents (objfile
->obfd
, sect
, contents
,
1001 (file_ptr
)0, (bfd_size_type
)debuglink_size
);
1003 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1004 crc_offset
= strlen (contents
) + 1;
1005 crc_offset
= (crc_offset
+ 3) & ~3;
1007 crc32
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) (contents
+ crc_offset
));
1014 separate_debug_file_exists (const char *name
, unsigned long crc
)
1016 unsigned long file_crc
= 0;
1018 char buffer
[8*1024];
1021 fd
= open (name
, O_RDONLY
| O_BINARY
);
1025 while ((count
= read (fd
, buffer
, sizeof (buffer
))) > 0)
1026 file_crc
= gnu_debuglink_crc32 (file_crc
, buffer
, count
);
1030 return crc
== file_crc
;
1033 static char *debug_file_directory
= NULL
;
1035 #if ! defined (DEBUG_SUBDIRECTORY)
1036 #define DEBUG_SUBDIRECTORY ".debug"
1040 find_separate_debug_file (struct objfile
*objfile
)
1047 bfd_size_type debuglink_size
;
1048 unsigned long crc32
;
1051 basename
= get_debug_link_info (objfile
, &crc32
);
1053 if (basename
== NULL
)
1056 dir
= xstrdup (objfile
->name
);
1058 /* Strip off the final filename part, leaving the directory name,
1059 followed by a slash. Objfile names should always be absolute and
1060 tilde-expanded, so there should always be a slash in there
1062 for (i
= strlen(dir
) - 1; i
>= 0; i
--)
1064 if (IS_DIR_SEPARATOR (dir
[i
]))
1067 gdb_assert (i
>= 0 && IS_DIR_SEPARATOR (dir
[i
]));
1070 debugfile
= alloca (strlen (debug_file_directory
) + 1
1072 + strlen (DEBUG_SUBDIRECTORY
)
1077 /* First try in the same directory as the original file. */
1078 strcpy (debugfile
, dir
);
1079 strcat (debugfile
, basename
);
1081 if (separate_debug_file_exists (debugfile
, crc32
))
1085 return xstrdup (debugfile
);
1088 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1089 strcpy (debugfile
, dir
);
1090 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1091 strcat (debugfile
, "/");
1092 strcat (debugfile
, basename
);
1094 if (separate_debug_file_exists (debugfile
, crc32
))
1098 return xstrdup (debugfile
);
1101 /* Then try in the global debugfile directory. */
1102 strcpy (debugfile
, debug_file_directory
);
1103 strcat (debugfile
, "/");
1104 strcat (debugfile
, dir
);
1105 strcat (debugfile
, basename
);
1107 if (separate_debug_file_exists (debugfile
, crc32
))
1111 return xstrdup (debugfile
);
1120 /* This is the symbol-file command. Read the file, analyze its
1121 symbols, and add a struct symtab to a symtab list. The syntax of
1122 the command is rather bizarre--(1) buildargv implements various
1123 quoting conventions which are undocumented and have little or
1124 nothing in common with the way things are quoted (or not quoted)
1125 elsewhere in GDB, (2) options are used, which are not generally
1126 used in GDB (perhaps "set mapped on", "set readnow on" would be
1127 better), (3) the order of options matters, which is contrary to GNU
1128 conventions (because it is confusing and inconvenient). */
1129 /* Note: ezannoni 2000-04-17. This function used to have support for
1130 rombug (see remote-os9k.c). It consisted of a call to target_link()
1131 (target.c) to get the address of the text segment from the target,
1132 and pass that to symbol_file_add(). This is no longer supported. */
1135 symbol_file_command (char *args
, int from_tty
)
1139 struct cleanup
*cleanups
;
1140 int flags
= OBJF_USERLOADED
;
1146 symbol_file_clear (from_tty
);
1150 if ((argv
= buildargv (args
)) == NULL
)
1154 cleanups
= make_cleanup_freeargv (argv
);
1155 while (*argv
!= NULL
)
1157 if (strcmp (*argv
, "-readnow") == 0)
1158 flags
|= OBJF_READNOW
;
1159 else if (**argv
== '-')
1160 error ("unknown option `%s'", *argv
);
1165 symbol_file_add_main_1 (name
, from_tty
, flags
);
1172 error ("no symbol file name was specified");
1174 do_cleanups (cleanups
);
1178 /* Set the initial language.
1180 A better solution would be to record the language in the psymtab when reading
1181 partial symbols, and then use it (if known) to set the language. This would
1182 be a win for formats that encode the language in an easily discoverable place,
1183 such as DWARF. For stabs, we can jump through hoops looking for specially
1184 named symbols or try to intuit the language from the specific type of stabs
1185 we find, but we can't do that until later when we read in full symbols.
1189 set_initial_language (void)
1191 struct partial_symtab
*pst
;
1192 enum language lang
= language_unknown
;
1194 pst
= find_main_psymtab ();
1197 if (pst
->filename
!= NULL
)
1199 lang
= deduce_language_from_filename (pst
->filename
);
1201 if (lang
== language_unknown
)
1203 /* Make C the default language */
1206 set_language (lang
);
1207 expected_language
= current_language
; /* Don't warn the user */
1211 /* Open file specified by NAME and hand it off to BFD for preliminary
1212 analysis. Result is a newly initialized bfd *, which includes a newly
1213 malloc'd` copy of NAME (tilde-expanded and made absolute).
1214 In case of trouble, error() is called. */
1217 symfile_bfd_open (char *name
)
1221 char *absolute_name
;
1225 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy */
1227 /* Look down path for it, allocate 2nd new malloc'd copy. */
1228 desc
= openp (getenv ("PATH"), 1, name
, O_RDONLY
| O_BINARY
, 0, &absolute_name
);
1229 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1232 char *exename
= alloca (strlen (name
) + 5);
1233 strcat (strcpy (exename
, name
), ".exe");
1234 desc
= openp (getenv ("PATH"), 1, exename
, O_RDONLY
| O_BINARY
,
1240 make_cleanup (xfree
, name
);
1241 perror_with_name (name
);
1243 xfree (name
); /* Free 1st new malloc'd copy */
1244 name
= absolute_name
; /* Keep 2nd malloc'd copy in bfd */
1245 /* It'll be freed in free_objfile(). */
1247 sym_bfd
= bfd_fdopenr (name
, gnutarget
, desc
);
1251 make_cleanup (xfree
, name
);
1252 error ("\"%s\": can't open to read symbols: %s.", name
,
1253 bfd_errmsg (bfd_get_error ()));
1255 bfd_set_cacheable (sym_bfd
, 1);
1257 if (!bfd_check_format (sym_bfd
, bfd_object
))
1259 /* FIXME: should be checking for errors from bfd_close (for one thing,
1260 on error it does not free all the storage associated with the
1262 bfd_close (sym_bfd
); /* This also closes desc */
1263 make_cleanup (xfree
, name
);
1264 error ("\"%s\": can't read symbols: %s.", name
,
1265 bfd_errmsg (bfd_get_error ()));
1270 /* Return the section index for the given section name. Return -1 if
1271 the section was not found. */
1273 get_section_index (struct objfile
*objfile
, char *section_name
)
1275 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1282 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1283 startup by the _initialize routine in each object file format reader,
1284 to register information about each format the the reader is prepared
1288 add_symtab_fns (struct sym_fns
*sf
)
1290 sf
->next
= symtab_fns
;
1295 /* Initialize to read symbols from the symbol file sym_bfd. It either
1296 returns or calls error(). The result is an initialized struct sym_fns
1297 in the objfile structure, that contains cached information about the
1301 find_sym_fns (struct objfile
*objfile
)
1304 enum bfd_flavour our_flavour
= bfd_get_flavour (objfile
->obfd
);
1305 char *our_target
= bfd_get_target (objfile
->obfd
);
1307 if (our_flavour
== bfd_target_srec_flavour
1308 || our_flavour
== bfd_target_ihex_flavour
1309 || our_flavour
== bfd_target_tekhex_flavour
)
1310 return; /* No symbols. */
1312 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
->next
)
1314 if (our_flavour
== sf
->sym_flavour
)
1320 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
1321 bfd_get_target (objfile
->obfd
));
1324 /* This function runs the load command of our current target. */
1327 load_command (char *arg
, int from_tty
)
1330 arg
= get_exec_file (1);
1331 target_load (arg
, from_tty
);
1333 /* After re-loading the executable, we don't really know which
1334 overlays are mapped any more. */
1335 overlay_cache_invalid
= 1;
1338 /* This version of "load" should be usable for any target. Currently
1339 it is just used for remote targets, not inftarg.c or core files,
1340 on the theory that only in that case is it useful.
1342 Avoiding xmodem and the like seems like a win (a) because we don't have
1343 to worry about finding it, and (b) On VMS, fork() is very slow and so
1344 we don't want to run a subprocess. On the other hand, I'm not sure how
1345 performance compares. */
1347 static int download_write_size
= 512;
1348 static int validate_download
= 0;
1350 /* Callback service function for generic_load (bfd_map_over_sections). */
1353 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1355 bfd_size_type
*sum
= data
;
1357 *sum
+= bfd_get_section_size_before_reloc (asec
);
1360 /* Opaque data for load_section_callback. */
1361 struct load_section_data
{
1362 unsigned long load_offset
;
1363 unsigned long write_count
;
1364 unsigned long data_count
;
1365 bfd_size_type total_size
;
1368 /* Callback service function for generic_load (bfd_map_over_sections). */
1371 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1373 struct load_section_data
*args
= data
;
1375 if (bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
)
1377 bfd_size_type size
= bfd_get_section_size_before_reloc (asec
);
1381 struct cleanup
*old_chain
;
1382 CORE_ADDR lma
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1383 bfd_size_type block_size
;
1385 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1388 if (download_write_size
> 0 && size
> download_write_size
)
1389 block_size
= download_write_size
;
1393 buffer
= xmalloc (size
);
1394 old_chain
= make_cleanup (xfree
, buffer
);
1396 /* Is this really necessary? I guess it gives the user something
1397 to look at during a long download. */
1398 ui_out_message (uiout
, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1399 sect_name
, paddr_nz (size
), paddr_nz (lma
));
1401 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1407 bfd_size_type this_transfer
= size
- sent
;
1409 if (this_transfer
>= block_size
)
1410 this_transfer
= block_size
;
1411 len
= target_write_memory_partial (lma
, buffer
,
1412 this_transfer
, &err
);
1415 if (validate_download
)
1417 /* Broken memories and broken monitors manifest
1418 themselves here when bring new computers to
1419 life. This doubles already slow downloads. */
1420 /* NOTE: cagney/1999-10-18: A more efficient
1421 implementation might add a verify_memory()
1422 method to the target vector and then use
1423 that. remote.c could implement that method
1424 using the ``qCRC'' packet. */
1425 char *check
= xmalloc (len
);
1426 struct cleanup
*verify_cleanups
=
1427 make_cleanup (xfree
, check
);
1429 if (target_read_memory (lma
, check
, len
) != 0)
1430 error ("Download verify read failed at 0x%s",
1432 if (memcmp (buffer
, check
, len
) != 0)
1433 error ("Download verify compare failed at 0x%s",
1435 do_cleanups (verify_cleanups
);
1437 args
->data_count
+= len
;
1440 args
->write_count
+= 1;
1443 || (deprecated_ui_load_progress_hook
!= NULL
1444 && deprecated_ui_load_progress_hook (sect_name
, sent
)))
1445 error ("Canceled the download");
1447 if (deprecated_show_load_progress
!= NULL
)
1448 deprecated_show_load_progress (sect_name
, sent
, size
,
1452 while (sent
< size
);
1455 error ("Memory access error while loading section %s.", sect_name
);
1457 do_cleanups (old_chain
);
1463 generic_load (char *args
, int from_tty
)
1467 time_t start_time
, end_time
; /* Start and end times of download */
1469 struct cleanup
*old_cleanups
;
1471 struct load_section_data cbdata
;
1474 cbdata
.load_offset
= 0; /* Offset to add to vma for each section. */
1475 cbdata
.write_count
= 0; /* Number of writes needed. */
1476 cbdata
.data_count
= 0; /* Number of bytes written to target memory. */
1477 cbdata
.total_size
= 0; /* Total size of all bfd sectors. */
1479 /* Parse the input argument - the user can specify a load offset as
1480 a second argument. */
1481 filename
= xmalloc (strlen (args
) + 1);
1482 old_cleanups
= make_cleanup (xfree
, filename
);
1483 strcpy (filename
, args
);
1484 offptr
= strchr (filename
, ' ');
1489 cbdata
.load_offset
= strtoul (offptr
, &endptr
, 0);
1490 if (offptr
== endptr
)
1491 error ("Invalid download offset:%s\n", offptr
);
1495 cbdata
.load_offset
= 0;
1497 /* Open the file for loading. */
1498 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
1499 if (loadfile_bfd
== NULL
)
1501 perror_with_name (filename
);
1505 /* FIXME: should be checking for errors from bfd_close (for one thing,
1506 on error it does not free all the storage associated with the
1508 make_cleanup_bfd_close (loadfile_bfd
);
1510 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
1512 error ("\"%s\" is not an object file: %s", filename
,
1513 bfd_errmsg (bfd_get_error ()));
1516 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
1517 (void *) &cbdata
.total_size
);
1519 start_time
= time (NULL
);
1521 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
1523 end_time
= time (NULL
);
1525 entry
= bfd_get_start_address (loadfile_bfd
);
1526 ui_out_text (uiout
, "Start address ");
1527 ui_out_field_fmt (uiout
, "address", "0x%s", paddr_nz (entry
));
1528 ui_out_text (uiout
, ", load size ");
1529 ui_out_field_fmt (uiout
, "load-size", "%lu", cbdata
.data_count
);
1530 ui_out_text (uiout
, "\n");
1531 /* We were doing this in remote-mips.c, I suspect it is right
1532 for other targets too. */
1535 /* FIXME: are we supposed to call symbol_file_add or not? According
1536 to a comment from remote-mips.c (where a call to symbol_file_add
1537 was commented out), making the call confuses GDB if more than one
1538 file is loaded in. Some targets do (e.g., remote-vx.c) but
1539 others don't (or didn't - perhaphs they have all been deleted). */
1541 print_transfer_performance (gdb_stdout
, cbdata
.data_count
,
1542 cbdata
.write_count
, end_time
- start_time
);
1544 do_cleanups (old_cleanups
);
1547 /* Report how fast the transfer went. */
1549 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1550 replaced by print_transfer_performance (with a very different
1551 function signature). */
1554 report_transfer_performance (unsigned long data_count
, time_t start_time
,
1557 print_transfer_performance (gdb_stdout
, data_count
,
1558 end_time
- start_time
, 0);
1562 print_transfer_performance (struct ui_file
*stream
,
1563 unsigned long data_count
,
1564 unsigned long write_count
,
1565 unsigned long time_count
)
1567 ui_out_text (uiout
, "Transfer rate: ");
1570 ui_out_field_fmt (uiout
, "transfer-rate", "%lu",
1571 (data_count
* 8) / time_count
);
1572 ui_out_text (uiout
, " bits/sec");
1576 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
1577 ui_out_text (uiout
, " bits in <1 sec");
1579 if (write_count
> 0)
1581 ui_out_text (uiout
, ", ");
1582 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
1583 ui_out_text (uiout
, " bytes/write");
1585 ui_out_text (uiout
, ".\n");
1588 /* This function allows the addition of incrementally linked object files.
1589 It does not modify any state in the target, only in the debugger. */
1590 /* Note: ezannoni 2000-04-13 This function/command used to have a
1591 special case syntax for the rombug target (Rombug is the boot
1592 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
1593 rombug case, the user doesn't need to supply a text address,
1594 instead a call to target_link() (in target.c) would supply the
1595 value to use. We are now discontinuing this type of ad hoc syntax. */
1598 add_symbol_file_command (char *args
, int from_tty
)
1600 char *filename
= NULL
;
1601 int flags
= OBJF_USERLOADED
;
1603 int expecting_option
= 0;
1604 int section_index
= 0;
1608 int expecting_sec_name
= 0;
1609 int expecting_sec_addr
= 0;
1617 struct section_addr_info
*section_addrs
;
1618 struct sect_opt
*sect_opts
= NULL
;
1619 size_t num_sect_opts
= 0;
1620 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
1623 sect_opts
= (struct sect_opt
*) xmalloc (num_sect_opts
1624 * sizeof (struct sect_opt
));
1629 error ("add-symbol-file takes a file name and an address");
1631 /* Make a copy of the string that we can safely write into. */
1632 args
= xstrdup (args
);
1634 while (*args
!= '\000')
1636 /* Any leading spaces? */
1637 while (isspace (*args
))
1640 /* Point arg to the beginning of the argument. */
1643 /* Move args pointer over the argument. */
1644 while ((*args
!= '\000') && !isspace (*args
))
1647 /* If there are more arguments, terminate arg and
1649 if (*args
!= '\000')
1652 /* Now process the argument. */
1655 /* The first argument is the file name. */
1656 filename
= tilde_expand (arg
);
1657 make_cleanup (xfree
, filename
);
1662 /* The second argument is always the text address at which
1663 to load the program. */
1664 sect_opts
[section_index
].name
= ".text";
1665 sect_opts
[section_index
].value
= arg
;
1666 if (++section_index
> num_sect_opts
)
1669 sect_opts
= ((struct sect_opt
*)
1670 xrealloc (sect_opts
,
1672 * sizeof (struct sect_opt
)));
1677 /* It's an option (starting with '-') or it's an argument
1682 if (strcmp (arg
, "-readnow") == 0)
1683 flags
|= OBJF_READNOW
;
1684 else if (strcmp (arg
, "-s") == 0)
1686 expecting_sec_name
= 1;
1687 expecting_sec_addr
= 1;
1692 if (expecting_sec_name
)
1694 sect_opts
[section_index
].name
= arg
;
1695 expecting_sec_name
= 0;
1698 if (expecting_sec_addr
)
1700 sect_opts
[section_index
].value
= arg
;
1701 expecting_sec_addr
= 0;
1702 if (++section_index
> num_sect_opts
)
1705 sect_opts
= ((struct sect_opt
*)
1706 xrealloc (sect_opts
,
1708 * sizeof (struct sect_opt
)));
1712 error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*");
1718 /* Print the prompt for the query below. And save the arguments into
1719 a sect_addr_info structure to be passed around to other
1720 functions. We have to split this up into separate print
1721 statements because local_hex_string returns a local static
1724 printf_unfiltered ("add symbol table from file \"%s\" at\n", filename
);
1725 section_addrs
= alloc_section_addr_info (section_index
);
1726 make_cleanup (xfree
, section_addrs
);
1727 for (i
= 0; i
< section_index
; i
++)
1730 char *val
= sect_opts
[i
].value
;
1731 char *sec
= sect_opts
[i
].name
;
1733 addr
= parse_and_eval_address (val
);
1735 /* Here we store the section offsets in the order they were
1736 entered on the command line. */
1737 section_addrs
->other
[sec_num
].name
= sec
;
1738 section_addrs
->other
[sec_num
].addr
= addr
;
1739 printf_unfiltered ("\t%s_addr = %s\n",
1741 local_hex_string ((unsigned long)addr
));
1744 /* The object's sections are initialized when a
1745 call is made to build_objfile_section_table (objfile).
1746 This happens in reread_symbols.
1747 At this point, we don't know what file type this is,
1748 so we can't determine what section names are valid. */
1751 if (from_tty
&& (!query ("%s", "")))
1752 error ("Not confirmed.");
1754 symbol_file_add (filename
, from_tty
, section_addrs
, 0, flags
);
1756 /* Getting new symbols may change our opinion about what is
1758 reinit_frame_cache ();
1759 do_cleanups (my_cleanups
);
1763 add_shared_symbol_files_command (char *args
, int from_tty
)
1765 #ifdef ADD_SHARED_SYMBOL_FILES
1766 ADD_SHARED_SYMBOL_FILES (args
, from_tty
);
1768 error ("This command is not available in this configuration of GDB.");
1773 /* Read inferior memory at ADDR to find the header of a loaded object file
1774 and read its in-core symbols out of inferior memory. TEMPL is a bfd
1775 representing the target's format. */
1777 symbol_file_add_from_memory (bfd
*templ
, CORE_ADDR addr
, int from_tty
)
1779 struct objfile
*objf
;
1783 struct section_addr_info
*sai
;
1786 if (bfd_get_flavour (templ
) != bfd_target_elf_flavour
)
1787 error ("add-symbol-file-from-memory not supported for this target");
1789 nbfd
= bfd_elf_bfd_from_remote_memory (templ
, addr
, &loadbase
,
1790 target_read_memory
);
1793 error ("Failed to read a valid object file image from memory.");
1797 nbfd
->filename
= xstrdup ("shared object read from target memory");
1799 if (!bfd_check_format (nbfd
, bfd_object
))
1801 /* FIXME: should be checking for errors from bfd_close (for one thing,
1802 on error it does not free all the storage associated with the
1805 error ("Got object file from memory but can't read symbols: %s.",
1806 bfd_errmsg (bfd_get_error ()));
1810 sai
= alloc_section_addr_info (bfd_count_sections (nbfd
));
1811 make_cleanup (xfree
, sai
);
1813 for (sec
= nbfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
1814 if ((bfd_get_section_flags (nbfd
, sec
) & (SEC_ALLOC
|SEC_LOAD
)) != 0)
1816 sai
->other
[i
].addr
= bfd_get_section_vma (nbfd
, sec
) + loadbase
;
1817 sai
->other
[i
].name
= (char *) bfd_get_section_name (nbfd
, sec
);
1818 sai
->other
[i
].sectindex
= sec
->index
;
1822 objf
= symbol_file_add_with_addrs_or_offsets (nbfd
, from_tty
,
1823 sai
, NULL
, 0, 0, OBJF_SHARED
);
1825 /* This might change our ideas about frames already looked at. */
1826 reinit_frame_cache ();
1833 add_symbol_file_from_memory_command (char *args
, int from_tty
)
1840 error ("add-symbol-file-from-memory requires an expression argument");
1842 addr
= parse_and_eval_address (args
);
1844 /* We need some representative bfd to know the target we are looking at. */
1845 if (symfile_objfile
!= NULL
)
1846 templ
= symfile_objfile
->obfd
;
1851 Must use symbol-file or exec-file before add-symbol-file-from-memory.");
1853 symbol_file_add_from_memory (templ
, addr
, from_tty
);
1855 error ("add-symbol-file-from-memory not implemented");
1859 /* Re-read symbols if a symbol-file has changed. */
1861 reread_symbols (void)
1863 struct objfile
*objfile
;
1866 struct stat new_statbuf
;
1869 /* With the addition of shared libraries, this should be modified,
1870 the load time should be saved in the partial symbol tables, since
1871 different tables may come from different source files. FIXME.
1872 This routine should then walk down each partial symbol table
1873 and see if the symbol table that it originates from has been changed */
1875 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
1879 #ifdef DEPRECATED_IBM6000_TARGET
1880 /* If this object is from a shared library, then you should
1881 stat on the library name, not member name. */
1883 if (objfile
->obfd
->my_archive
)
1884 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
1887 res
= stat (objfile
->name
, &new_statbuf
);
1890 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1891 printf_unfiltered ("`%s' has disappeared; keeping its symbols.\n",
1895 new_modtime
= new_statbuf
.st_mtime
;
1896 if (new_modtime
!= objfile
->mtime
)
1898 struct cleanup
*old_cleanups
;
1899 struct section_offsets
*offsets
;
1901 char *obfd_filename
;
1903 printf_unfiltered ("`%s' has changed; re-reading symbols.\n",
1906 /* There are various functions like symbol_file_add,
1907 symfile_bfd_open, syms_from_objfile, etc., which might
1908 appear to do what we want. But they have various other
1909 effects which we *don't* want. So we just do stuff
1910 ourselves. We don't worry about mapped files (for one thing,
1911 any mapped file will be out of date). */
1913 /* If we get an error, blow away this objfile (not sure if
1914 that is the correct response for things like shared
1916 old_cleanups
= make_cleanup_free_objfile (objfile
);
1917 /* We need to do this whenever any symbols go away. */
1918 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
1920 /* Clean up any state BFD has sitting around. We don't need
1921 to close the descriptor but BFD lacks a way of closing the
1922 BFD without closing the descriptor. */
1923 obfd_filename
= bfd_get_filename (objfile
->obfd
);
1924 if (!bfd_close (objfile
->obfd
))
1925 error ("Can't close BFD for %s: %s", objfile
->name
,
1926 bfd_errmsg (bfd_get_error ()));
1927 objfile
->obfd
= bfd_openr (obfd_filename
, gnutarget
);
1928 if (objfile
->obfd
== NULL
)
1929 error ("Can't open %s to read symbols.", objfile
->name
);
1930 /* bfd_openr sets cacheable to true, which is what we want. */
1931 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
1932 error ("Can't read symbols from %s: %s.", objfile
->name
,
1933 bfd_errmsg (bfd_get_error ()));
1935 /* Save the offsets, we will nuke them with the rest of the
1937 num_offsets
= objfile
->num_sections
;
1938 offsets
= ((struct section_offsets
*)
1939 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
1940 memcpy (offsets
, objfile
->section_offsets
,
1941 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
1943 /* Nuke all the state that we will re-read. Much of the following
1944 code which sets things to NULL really is necessary to tell
1945 other parts of GDB that there is nothing currently there. */
1947 /* FIXME: Do we have to free a whole linked list, or is this
1949 if (objfile
->global_psymbols
.list
)
1950 xmfree (objfile
->md
, objfile
->global_psymbols
.list
);
1951 memset (&objfile
->global_psymbols
, 0,
1952 sizeof (objfile
->global_psymbols
));
1953 if (objfile
->static_psymbols
.list
)
1954 xmfree (objfile
->md
, objfile
->static_psymbols
.list
);
1955 memset (&objfile
->static_psymbols
, 0,
1956 sizeof (objfile
->static_psymbols
));
1958 /* Free the obstacks for non-reusable objfiles */
1959 bcache_xfree (objfile
->psymbol_cache
);
1960 objfile
->psymbol_cache
= bcache_xmalloc ();
1961 bcache_xfree (objfile
->macro_cache
);
1962 objfile
->macro_cache
= bcache_xmalloc ();
1963 if (objfile
->demangled_names_hash
!= NULL
)
1965 htab_delete (objfile
->demangled_names_hash
);
1966 objfile
->demangled_names_hash
= NULL
;
1968 obstack_free (&objfile
->objfile_obstack
, 0);
1969 objfile
->sections
= NULL
;
1970 objfile
->symtabs
= NULL
;
1971 objfile
->psymtabs
= NULL
;
1972 objfile
->free_psymtabs
= NULL
;
1973 objfile
->cp_namespace_symtab
= NULL
;
1974 objfile
->msymbols
= NULL
;
1975 objfile
->sym_private
= NULL
;
1976 objfile
->minimal_symbol_count
= 0;
1977 memset (&objfile
->msymbol_hash
, 0,
1978 sizeof (objfile
->msymbol_hash
));
1979 memset (&objfile
->msymbol_demangled_hash
, 0,
1980 sizeof (objfile
->msymbol_demangled_hash
));
1981 objfile
->fundamental_types
= NULL
;
1982 clear_objfile_data (objfile
);
1983 if (objfile
->sf
!= NULL
)
1985 (*objfile
->sf
->sym_finish
) (objfile
);
1988 /* We never make this a mapped file. */
1990 objfile
->psymbol_cache
= bcache_xmalloc ();
1991 objfile
->macro_cache
= bcache_xmalloc ();
1992 /* obstack_init also initializes the obstack so it is
1993 empty. We could use obstack_specify_allocation but
1994 gdb_obstack.h specifies the alloc/dealloc
1996 obstack_init (&objfile
->objfile_obstack
);
1997 if (build_objfile_section_table (objfile
))
1999 error ("Can't find the file sections in `%s': %s",
2000 objfile
->name
, bfd_errmsg (bfd_get_error ()));
2002 terminate_minimal_symbol_table (objfile
);
2004 /* We use the same section offsets as from last time. I'm not
2005 sure whether that is always correct for shared libraries. */
2006 objfile
->section_offsets
= (struct section_offsets
*)
2007 obstack_alloc (&objfile
->objfile_obstack
,
2008 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2009 memcpy (objfile
->section_offsets
, offsets
,
2010 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2011 objfile
->num_sections
= num_offsets
;
2013 /* What the hell is sym_new_init for, anyway? The concept of
2014 distinguishing between the main file and additional files
2015 in this way seems rather dubious. */
2016 if (objfile
== symfile_objfile
)
2018 (*objfile
->sf
->sym_new_init
) (objfile
);
2020 RESET_HP_UX_GLOBALS ();
2024 (*objfile
->sf
->sym_init
) (objfile
);
2025 clear_complaints (&symfile_complaints
, 1, 1);
2026 /* The "mainline" parameter is a hideous hack; I think leaving it
2027 zero is OK since dbxread.c also does what it needs to do if
2028 objfile->global_psymbols.size is 0. */
2029 (*objfile
->sf
->sym_read
) (objfile
, 0);
2030 if (!have_partial_symbols () && !have_full_symbols ())
2033 printf_unfiltered ("(no debugging symbols found)\n");
2036 objfile
->flags
|= OBJF_SYMS
;
2038 /* We're done reading the symbol file; finish off complaints. */
2039 clear_complaints (&symfile_complaints
, 0, 1);
2041 /* Getting new symbols may change our opinion about what is
2044 reinit_frame_cache ();
2046 /* Discard cleanups as symbol reading was successful. */
2047 discard_cleanups (old_cleanups
);
2049 /* If the mtime has changed between the time we set new_modtime
2050 and now, we *want* this to be out of date, so don't call stat
2052 objfile
->mtime
= new_modtime
;
2054 reread_separate_symbols (objfile
);
2060 clear_symtab_users ();
2064 /* Handle separate debug info for OBJFILE, which has just been
2066 - If we had separate debug info before, but now we don't, get rid
2067 of the separated objfile.
2068 - If we didn't have separated debug info before, but now we do,
2069 read in the new separated debug info file.
2070 - If the debug link points to a different file, toss the old one
2071 and read the new one.
2072 This function does *not* handle the case where objfile is still
2073 using the same separate debug info file, but that file's timestamp
2074 has changed. That case should be handled by the loop in
2075 reread_symbols already. */
2077 reread_separate_symbols (struct objfile
*objfile
)
2080 unsigned long crc32
;
2082 /* Does the updated objfile's debug info live in a
2084 debug_file
= find_separate_debug_file (objfile
);
2086 if (objfile
->separate_debug_objfile
)
2088 /* There are two cases where we need to get rid of
2089 the old separated debug info objfile:
2090 - if the new primary objfile doesn't have
2091 separated debug info, or
2092 - if the new primary objfile has separate debug
2093 info, but it's under a different filename.
2095 If the old and new objfiles both have separate
2096 debug info, under the same filename, then we're
2097 okay --- if the separated file's contents have
2098 changed, we will have caught that when we
2099 visited it in this function's outermost
2102 || strcmp (debug_file
, objfile
->separate_debug_objfile
->name
) != 0)
2103 free_objfile (objfile
->separate_debug_objfile
);
2106 /* If the new objfile has separate debug info, and we
2107 haven't loaded it already, do so now. */
2109 && ! objfile
->separate_debug_objfile
)
2111 /* Use the same section offset table as objfile itself.
2112 Preserve the flags from objfile that make sense. */
2113 objfile
->separate_debug_objfile
2114 = (symbol_file_add_with_addrs_or_offsets
2115 (symfile_bfd_open (debug_file
),
2116 info_verbose
, /* from_tty: Don't override the default. */
2117 0, /* No addr table. */
2118 objfile
->section_offsets
, objfile
->num_sections
,
2119 0, /* Not mainline. See comments about this above. */
2120 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
2121 | OBJF_USERLOADED
)));
2122 objfile
->separate_debug_objfile
->separate_debug_objfile_backlink
2138 static filename_language
*filename_language_table
;
2139 static int fl_table_size
, fl_table_next
;
2142 add_filename_language (char *ext
, enum language lang
)
2144 if (fl_table_next
>= fl_table_size
)
2146 fl_table_size
+= 10;
2147 filename_language_table
=
2148 xrealloc (filename_language_table
,
2149 fl_table_size
* sizeof (*filename_language_table
));
2152 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2153 filename_language_table
[fl_table_next
].lang
= lang
;
2157 static char *ext_args
;
2160 set_ext_lang_command (char *args
, int from_tty
)
2163 char *cp
= ext_args
;
2166 /* First arg is filename extension, starting with '.' */
2168 error ("'%s': Filename extension must begin with '.'", ext_args
);
2170 /* Find end of first arg. */
2171 while (*cp
&& !isspace (*cp
))
2175 error ("'%s': two arguments required -- filename extension and language",
2178 /* Null-terminate first arg */
2181 /* Find beginning of second arg, which should be a source language. */
2182 while (*cp
&& isspace (*cp
))
2186 error ("'%s': two arguments required -- filename extension and language",
2189 /* Lookup the language from among those we know. */
2190 lang
= language_enum (cp
);
2192 /* Now lookup the filename extension: do we already know it? */
2193 for (i
= 0; i
< fl_table_next
; i
++)
2194 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2197 if (i
>= fl_table_next
)
2199 /* new file extension */
2200 add_filename_language (ext_args
, lang
);
2204 /* redefining a previously known filename extension */
2207 /* query ("Really make files of type %s '%s'?", */
2208 /* ext_args, language_str (lang)); */
2210 xfree (filename_language_table
[i
].ext
);
2211 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2212 filename_language_table
[i
].lang
= lang
;
2217 info_ext_lang_command (char *args
, int from_tty
)
2221 printf_filtered ("Filename extensions and the languages they represent:");
2222 printf_filtered ("\n\n");
2223 for (i
= 0; i
< fl_table_next
; i
++)
2224 printf_filtered ("\t%s\t- %s\n",
2225 filename_language_table
[i
].ext
,
2226 language_str (filename_language_table
[i
].lang
));
2230 init_filename_language_table (void)
2232 if (fl_table_size
== 0) /* protect against repetition */
2236 filename_language_table
=
2237 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
2238 add_filename_language (".c", language_c
);
2239 add_filename_language (".C", language_cplus
);
2240 add_filename_language (".cc", language_cplus
);
2241 add_filename_language (".cp", language_cplus
);
2242 add_filename_language (".cpp", language_cplus
);
2243 add_filename_language (".cxx", language_cplus
);
2244 add_filename_language (".c++", language_cplus
);
2245 add_filename_language (".java", language_java
);
2246 add_filename_language (".class", language_java
);
2247 add_filename_language (".m", language_objc
);
2248 add_filename_language (".f", language_fortran
);
2249 add_filename_language (".F", language_fortran
);
2250 add_filename_language (".s", language_asm
);
2251 add_filename_language (".S", language_asm
);
2252 add_filename_language (".pas", language_pascal
);
2253 add_filename_language (".p", language_pascal
);
2254 add_filename_language (".pp", language_pascal
);
2259 deduce_language_from_filename (char *filename
)
2264 if (filename
!= NULL
)
2265 if ((cp
= strrchr (filename
, '.')) != NULL
)
2266 for (i
= 0; i
< fl_table_next
; i
++)
2267 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2268 return filename_language_table
[i
].lang
;
2270 return language_unknown
;
2275 Allocate and partly initialize a new symbol table. Return a pointer
2276 to it. error() if no space.
2278 Caller must set these fields:
2284 possibly free_named_symtabs (symtab->filename);
2288 allocate_symtab (char *filename
, struct objfile
*objfile
)
2290 struct symtab
*symtab
;
2292 symtab
= (struct symtab
*)
2293 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symtab
));
2294 memset (symtab
, 0, sizeof (*symtab
));
2295 symtab
->filename
= obsavestring (filename
, strlen (filename
),
2296 &objfile
->objfile_obstack
);
2297 symtab
->fullname
= NULL
;
2298 symtab
->language
= deduce_language_from_filename (filename
);
2299 symtab
->debugformat
= obsavestring ("unknown", 7,
2300 &objfile
->objfile_obstack
);
2302 /* Hook it to the objfile it comes from */
2304 symtab
->objfile
= objfile
;
2305 symtab
->next
= objfile
->symtabs
;
2306 objfile
->symtabs
= symtab
;
2308 /* FIXME: This should go away. It is only defined for the Z8000,
2309 and the Z8000 definition of this macro doesn't have anything to
2310 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
2311 here for convenience. */
2312 #ifdef INIT_EXTRA_SYMTAB_INFO
2313 INIT_EXTRA_SYMTAB_INFO (symtab
);
2319 struct partial_symtab
*
2320 allocate_psymtab (char *filename
, struct objfile
*objfile
)
2322 struct partial_symtab
*psymtab
;
2324 if (objfile
->free_psymtabs
)
2326 psymtab
= objfile
->free_psymtabs
;
2327 objfile
->free_psymtabs
= psymtab
->next
;
2330 psymtab
= (struct partial_symtab
*)
2331 obstack_alloc (&objfile
->objfile_obstack
,
2332 sizeof (struct partial_symtab
));
2334 memset (psymtab
, 0, sizeof (struct partial_symtab
));
2335 psymtab
->filename
= obsavestring (filename
, strlen (filename
),
2336 &objfile
->objfile_obstack
);
2337 psymtab
->symtab
= NULL
;
2339 /* Prepend it to the psymtab list for the objfile it belongs to.
2340 Psymtabs are searched in most recent inserted -> least recent
2343 psymtab
->objfile
= objfile
;
2344 psymtab
->next
= objfile
->psymtabs
;
2345 objfile
->psymtabs
= psymtab
;
2348 struct partial_symtab
**prev_pst
;
2349 psymtab
->objfile
= objfile
;
2350 psymtab
->next
= NULL
;
2351 prev_pst
= &(objfile
->psymtabs
);
2352 while ((*prev_pst
) != NULL
)
2353 prev_pst
= &((*prev_pst
)->next
);
2354 (*prev_pst
) = psymtab
;
2362 discard_psymtab (struct partial_symtab
*pst
)
2364 struct partial_symtab
**prev_pst
;
2367 Empty psymtabs happen as a result of header files which don't
2368 have any symbols in them. There can be a lot of them. But this
2369 check is wrong, in that a psymtab with N_SLINE entries but
2370 nothing else is not empty, but we don't realize that. Fixing
2371 that without slowing things down might be tricky. */
2373 /* First, snip it out of the psymtab chain */
2375 prev_pst
= &(pst
->objfile
->psymtabs
);
2376 while ((*prev_pst
) != pst
)
2377 prev_pst
= &((*prev_pst
)->next
);
2378 (*prev_pst
) = pst
->next
;
2380 /* Next, put it on a free list for recycling */
2382 pst
->next
= pst
->objfile
->free_psymtabs
;
2383 pst
->objfile
->free_psymtabs
= pst
;
2387 /* Reset all data structures in gdb which may contain references to symbol
2391 clear_symtab_users (void)
2393 /* Someday, we should do better than this, by only blowing away
2394 the things that really need to be blown. */
2395 clear_value_history ();
2397 clear_internalvars ();
2398 breakpoint_re_set ();
2399 set_default_breakpoint (0, 0, 0, 0);
2400 clear_current_source_symtab_and_line ();
2401 clear_pc_function_cache ();
2402 if (deprecated_target_new_objfile_hook
)
2403 deprecated_target_new_objfile_hook (NULL
);
2407 clear_symtab_users_cleanup (void *ignore
)
2409 clear_symtab_users ();
2412 /* clear_symtab_users_once:
2414 This function is run after symbol reading, or from a cleanup.
2415 If an old symbol table was obsoleted, the old symbol table
2416 has been blown away, but the other GDB data structures that may
2417 reference it have not yet been cleared or re-directed. (The old
2418 symtab was zapped, and the cleanup queued, in free_named_symtab()
2421 This function can be queued N times as a cleanup, or called
2422 directly; it will do all the work the first time, and then will be a
2423 no-op until the next time it is queued. This works by bumping a
2424 counter at queueing time. Much later when the cleanup is run, or at
2425 the end of symbol processing (in case the cleanup is discarded), if
2426 the queued count is greater than the "done-count", we do the work
2427 and set the done-count to the queued count. If the queued count is
2428 less than or equal to the done-count, we just ignore the call. This
2429 is needed because reading a single .o file will often replace many
2430 symtabs (one per .h file, for example), and we don't want to reset
2431 the breakpoints N times in the user's face.
2433 The reason we both queue a cleanup, and call it directly after symbol
2434 reading, is because the cleanup protects us in case of errors, but is
2435 discarded if symbol reading is successful. */
2438 /* FIXME: As free_named_symtabs is currently a big noop this function
2439 is no longer needed. */
2440 static void clear_symtab_users_once (void);
2442 static int clear_symtab_users_queued
;
2443 static int clear_symtab_users_done
;
2446 clear_symtab_users_once (void)
2448 /* Enforce once-per-`do_cleanups'-semantics */
2449 if (clear_symtab_users_queued
<= clear_symtab_users_done
)
2451 clear_symtab_users_done
= clear_symtab_users_queued
;
2453 clear_symtab_users ();
2457 /* Delete the specified psymtab, and any others that reference it. */
2460 cashier_psymtab (struct partial_symtab
*pst
)
2462 struct partial_symtab
*ps
, *pprev
= NULL
;
2465 /* Find its previous psymtab in the chain */
2466 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2475 /* Unhook it from the chain. */
2476 if (ps
== pst
->objfile
->psymtabs
)
2477 pst
->objfile
->psymtabs
= ps
->next
;
2479 pprev
->next
= ps
->next
;
2481 /* FIXME, we can't conveniently deallocate the entries in the
2482 partial_symbol lists (global_psymbols/static_psymbols) that
2483 this psymtab points to. These just take up space until all
2484 the psymtabs are reclaimed. Ditto the dependencies list and
2485 filename, which are all in the objfile_obstack. */
2487 /* We need to cashier any psymtab that has this one as a dependency... */
2489 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2491 for (i
= 0; i
< ps
->number_of_dependencies
; i
++)
2493 if (ps
->dependencies
[i
] == pst
)
2495 cashier_psymtab (ps
);
2496 goto again
; /* Must restart, chain has been munged. */
2503 /* If a symtab or psymtab for filename NAME is found, free it along
2504 with any dependent breakpoints, displays, etc.
2505 Used when loading new versions of object modules with the "add-file"
2506 command. This is only called on the top-level symtab or psymtab's name;
2507 it is not called for subsidiary files such as .h files.
2509 Return value is 1 if we blew away the environment, 0 if not.
2510 FIXME. The return value appears to never be used.
2512 FIXME. I think this is not the best way to do this. We should
2513 work on being gentler to the environment while still cleaning up
2514 all stray pointers into the freed symtab. */
2517 free_named_symtabs (char *name
)
2520 /* FIXME: With the new method of each objfile having it's own
2521 psymtab list, this function needs serious rethinking. In particular,
2522 why was it ever necessary to toss psymtabs with specific compilation
2523 unit filenames, as opposed to all psymtabs from a particular symbol
2525 Well, the answer is that some systems permit reloading of particular
2526 compilation units. We want to blow away any old info about these
2527 compilation units, regardless of which objfiles they arrived in. --gnu. */
2530 struct symtab
*prev
;
2531 struct partial_symtab
*ps
;
2532 struct blockvector
*bv
;
2535 /* We only wack things if the symbol-reload switch is set. */
2536 if (!symbol_reloading
)
2539 /* Some symbol formats have trouble providing file names... */
2540 if (name
== 0 || *name
== '\0')
2543 /* Look for a psymtab with the specified name. */
2546 for (ps
= partial_symtab_list
; ps
; ps
= ps
->next
)
2548 if (strcmp (name
, ps
->filename
) == 0)
2550 cashier_psymtab (ps
); /* Blow it away...and its little dog, too. */
2551 goto again2
; /* Must restart, chain has been munged */
2555 /* Look for a symtab with the specified name. */
2557 for (s
= symtab_list
; s
; s
= s
->next
)
2559 if (strcmp (name
, s
->filename
) == 0)
2566 if (s
== symtab_list
)
2567 symtab_list
= s
->next
;
2569 prev
->next
= s
->next
;
2571 /* For now, queue a delete for all breakpoints, displays, etc., whether
2572 or not they depend on the symtab being freed. This should be
2573 changed so that only those data structures affected are deleted. */
2575 /* But don't delete anything if the symtab is empty.
2576 This test is necessary due to a bug in "dbxread.c" that
2577 causes empty symtabs to be created for N_SO symbols that
2578 contain the pathname of the object file. (This problem
2579 has been fixed in GDB 3.9x). */
2581 bv
= BLOCKVECTOR (s
);
2582 if (BLOCKVECTOR_NBLOCKS (bv
) > 2
2583 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
))
2584 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)))
2586 complaint (&symfile_complaints
, "Replacing old symbols for `%s'",
2588 clear_symtab_users_queued
++;
2589 make_cleanup (clear_symtab_users_once
, 0);
2594 complaint (&symfile_complaints
, "Empty symbol table found for `%s'",
2602 /* It is still possible that some breakpoints will be affected
2603 even though no symtab was found, since the file might have
2604 been compiled without debugging, and hence not be associated
2605 with a symtab. In order to handle this correctly, we would need
2606 to keep a list of text address ranges for undebuggable files.
2607 For now, we do nothing, since this is a fairly obscure case. */
2611 /* FIXME, what about the minimal symbol table? */
2618 /* Allocate and partially fill a partial symtab. It will be
2619 completely filled at the end of the symbol list.
2621 FILENAME is the name of the symbol-file we are reading from. */
2623 struct partial_symtab
*
2624 start_psymtab_common (struct objfile
*objfile
,
2625 struct section_offsets
*section_offsets
, char *filename
,
2626 CORE_ADDR textlow
, struct partial_symbol
**global_syms
,
2627 struct partial_symbol
**static_syms
)
2629 struct partial_symtab
*psymtab
;
2631 psymtab
= allocate_psymtab (filename
, objfile
);
2632 psymtab
->section_offsets
= section_offsets
;
2633 psymtab
->textlow
= textlow
;
2634 psymtab
->texthigh
= psymtab
->textlow
; /* default */
2635 psymtab
->globals_offset
= global_syms
- objfile
->global_psymbols
.list
;
2636 psymtab
->statics_offset
= static_syms
- objfile
->static_psymbols
.list
;
2640 /* Add a symbol with a long value to a psymtab.
2641 Since one arg is a struct, we pass in a ptr and deref it (sigh).
2642 Return the partial symbol that has been added. */
2644 /* NOTE: carlton/2003-09-11: The reason why we return the partial
2645 symbol is so that callers can get access to the symbol's demangled
2646 name, which they don't have any cheap way to determine otherwise.
2647 (Currenly, dwarf2read.c is the only file who uses that information,
2648 though it's possible that other readers might in the future.)
2649 Elena wasn't thrilled about that, and I don't blame her, but we
2650 couldn't come up with a better way to get that information. If
2651 it's needed in other situations, we could consider breaking up
2652 SYMBOL_SET_NAMES to provide access to the demangled name lookup
2655 const struct partial_symbol
*
2656 add_psymbol_to_list (char *name
, int namelength
, domain_enum domain
,
2657 enum address_class
class,
2658 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2659 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2660 enum language language
, struct objfile
*objfile
)
2662 struct partial_symbol
*psym
;
2663 char *buf
= alloca (namelength
+ 1);
2664 /* psymbol is static so that there will be no uninitialized gaps in the
2665 structure which might contain random data, causing cache misses in
2667 static struct partial_symbol psymbol
;
2669 /* Create local copy of the partial symbol */
2670 memcpy (buf
, name
, namelength
);
2671 buf
[namelength
] = '\0';
2672 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2675 SYMBOL_VALUE (&psymbol
) = val
;
2679 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2681 SYMBOL_SECTION (&psymbol
) = 0;
2682 SYMBOL_LANGUAGE (&psymbol
) = language
;
2683 PSYMBOL_DOMAIN (&psymbol
) = domain
;
2684 PSYMBOL_CLASS (&psymbol
) = class;
2686 SYMBOL_SET_NAMES (&psymbol
, buf
, namelength
, objfile
);
2688 /* Stash the partial symbol away in the cache */
2689 psym
= deprecated_bcache (&psymbol
, sizeof (struct partial_symbol
),
2690 objfile
->psymbol_cache
);
2692 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2693 if (list
->next
>= list
->list
+ list
->size
)
2695 extend_psymbol_list (list
, objfile
);
2697 *list
->next
++ = psym
;
2698 OBJSTAT (objfile
, n_psyms
++);
2703 /* Add a symbol with a long value to a psymtab. This differs from
2704 * add_psymbol_to_list above in taking both a mangled and a demangled
2708 add_psymbol_with_dem_name_to_list (char *name
, int namelength
, char *dem_name
,
2709 int dem_namelength
, domain_enum domain
,
2710 enum address_class
class,
2711 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2712 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2713 enum language language
,
2714 struct objfile
*objfile
)
2716 struct partial_symbol
*psym
;
2717 char *buf
= alloca (namelength
+ 1);
2718 /* psymbol is static so that there will be no uninitialized gaps in the
2719 structure which might contain random data, causing cache misses in
2721 static struct partial_symbol psymbol
;
2723 /* Create local copy of the partial symbol */
2725 memcpy (buf
, name
, namelength
);
2726 buf
[namelength
] = '\0';
2727 DEPRECATED_SYMBOL_NAME (&psymbol
) = deprecated_bcache (buf
, namelength
+ 1,
2728 objfile
->psymbol_cache
);
2730 buf
= alloca (dem_namelength
+ 1);
2731 memcpy (buf
, dem_name
, dem_namelength
);
2732 buf
[dem_namelength
] = '\0';
2737 case language_cplus
:
2738 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol
) =
2739 deprecated_bcache (buf
, dem_namelength
+ 1, objfile
->psymbol_cache
);
2741 /* FIXME What should be done for the default case? Ignoring for now. */
2744 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2747 SYMBOL_VALUE (&psymbol
) = val
;
2751 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2753 SYMBOL_SECTION (&psymbol
) = 0;
2754 SYMBOL_LANGUAGE (&psymbol
) = language
;
2755 PSYMBOL_DOMAIN (&psymbol
) = domain
;
2756 PSYMBOL_CLASS (&psymbol
) = class;
2757 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2759 /* Stash the partial symbol away in the cache */
2760 psym
= deprecated_bcache (&psymbol
, sizeof (struct partial_symbol
),
2761 objfile
->psymbol_cache
);
2763 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2764 if (list
->next
>= list
->list
+ list
->size
)
2766 extend_psymbol_list (list
, objfile
);
2768 *list
->next
++ = psym
;
2769 OBJSTAT (objfile
, n_psyms
++);
2772 /* Initialize storage for partial symbols. */
2775 init_psymbol_list (struct objfile
*objfile
, int total_symbols
)
2777 /* Free any previously allocated psymbol lists. */
2779 if (objfile
->global_psymbols
.list
)
2781 xmfree (objfile
->md
, objfile
->global_psymbols
.list
);
2783 if (objfile
->static_psymbols
.list
)
2785 xmfree (objfile
->md
, objfile
->static_psymbols
.list
);
2788 /* Current best guess is that approximately a twentieth
2789 of the total symbols (in a debugging file) are global or static
2792 objfile
->global_psymbols
.size
= total_symbols
/ 10;
2793 objfile
->static_psymbols
.size
= total_symbols
/ 10;
2795 if (objfile
->global_psymbols
.size
> 0)
2797 objfile
->global_psymbols
.next
=
2798 objfile
->global_psymbols
.list
= (struct partial_symbol
**)
2799 xmmalloc (objfile
->md
, (objfile
->global_psymbols
.size
2800 * sizeof (struct partial_symbol
*)));
2802 if (objfile
->static_psymbols
.size
> 0)
2804 objfile
->static_psymbols
.next
=
2805 objfile
->static_psymbols
.list
= (struct partial_symbol
**)
2806 xmmalloc (objfile
->md
, (objfile
->static_psymbols
.size
2807 * sizeof (struct partial_symbol
*)));
2812 The following code implements an abstraction for debugging overlay sections.
2814 The target model is as follows:
2815 1) The gnu linker will permit multiple sections to be mapped into the
2816 same VMA, each with its own unique LMA (or load address).
2817 2) It is assumed that some runtime mechanism exists for mapping the
2818 sections, one by one, from the load address into the VMA address.
2819 3) This code provides a mechanism for gdb to keep track of which
2820 sections should be considered to be mapped from the VMA to the LMA.
2821 This information is used for symbol lookup, and memory read/write.
2822 For instance, if a section has been mapped then its contents
2823 should be read from the VMA, otherwise from the LMA.
2825 Two levels of debugger support for overlays are available. One is
2826 "manual", in which the debugger relies on the user to tell it which
2827 overlays are currently mapped. This level of support is
2828 implemented entirely in the core debugger, and the information about
2829 whether a section is mapped is kept in the objfile->obj_section table.
2831 The second level of support is "automatic", and is only available if
2832 the target-specific code provides functionality to read the target's
2833 overlay mapping table, and translate its contents for the debugger
2834 (by updating the mapped state information in the obj_section tables).
2836 The interface is as follows:
2838 overlay map <name> -- tell gdb to consider this section mapped
2839 overlay unmap <name> -- tell gdb to consider this section unmapped
2840 overlay list -- list the sections that GDB thinks are mapped
2841 overlay read-target -- get the target's state of what's mapped
2842 overlay off/manual/auto -- set overlay debugging state
2843 Functional interface:
2844 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2845 section, return that section.
2846 find_pc_overlay(pc): find any overlay section that contains
2847 the pc, either in its VMA or its LMA
2848 overlay_is_mapped(sect): true if overlay is marked as mapped
2849 section_is_overlay(sect): true if section's VMA != LMA
2850 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2851 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2852 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2853 overlay_mapped_address(...): map an address from section's LMA to VMA
2854 overlay_unmapped_address(...): map an address from section's VMA to LMA
2855 symbol_overlayed_address(...): Return a "current" address for symbol:
2856 either in VMA or LMA depending on whether
2857 the symbol's section is currently mapped
2860 /* Overlay debugging state: */
2862 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2863 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
2865 /* Target vector for refreshing overlay mapped state */
2866 static void simple_overlay_update (struct obj_section
*);
2867 void (*target_overlay_update
) (struct obj_section
*) = simple_overlay_update
;
2869 /* Function: section_is_overlay (SECTION)
2870 Returns true if SECTION has VMA not equal to LMA, ie.
2871 SECTION is loaded at an address different from where it will "run". */
2874 section_is_overlay (asection
*section
)
2876 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2878 if (overlay_debugging
)
2879 if (section
&& section
->lma
!= 0 &&
2880 section
->vma
!= section
->lma
)
2886 /* Function: overlay_invalidate_all (void)
2887 Invalidate the mapped state of all overlay sections (mark it as stale). */
2890 overlay_invalidate_all (void)
2892 struct objfile
*objfile
;
2893 struct obj_section
*sect
;
2895 ALL_OBJSECTIONS (objfile
, sect
)
2896 if (section_is_overlay (sect
->the_bfd_section
))
2897 sect
->ovly_mapped
= -1;
2900 /* Function: overlay_is_mapped (SECTION)
2901 Returns true if section is an overlay, and is currently mapped.
2902 Private: public access is thru function section_is_mapped.
2904 Access to the ovly_mapped flag is restricted to this function, so
2905 that we can do automatic update. If the global flag
2906 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2907 overlay_invalidate_all. If the mapped state of the particular
2908 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2911 overlay_is_mapped (struct obj_section
*osect
)
2913 if (osect
== 0 || !section_is_overlay (osect
->the_bfd_section
))
2916 switch (overlay_debugging
)
2920 return 0; /* overlay debugging off */
2921 case ovly_auto
: /* overlay debugging automatic */
2922 /* Unles there is a target_overlay_update function,
2923 there's really nothing useful to do here (can't really go auto) */
2924 if (target_overlay_update
)
2926 if (overlay_cache_invalid
)
2928 overlay_invalidate_all ();
2929 overlay_cache_invalid
= 0;
2931 if (osect
->ovly_mapped
== -1)
2932 (*target_overlay_update
) (osect
);
2934 /* fall thru to manual case */
2935 case ovly_on
: /* overlay debugging manual */
2936 return osect
->ovly_mapped
== 1;
2940 /* Function: section_is_mapped
2941 Returns true if section is an overlay, and is currently mapped. */
2944 section_is_mapped (asection
*section
)
2946 struct objfile
*objfile
;
2947 struct obj_section
*osect
;
2949 if (overlay_debugging
)
2950 if (section
&& section_is_overlay (section
))
2951 ALL_OBJSECTIONS (objfile
, osect
)
2952 if (osect
->the_bfd_section
== section
)
2953 return overlay_is_mapped (osect
);
2958 /* Function: pc_in_unmapped_range
2959 If PC falls into the lma range of SECTION, return true, else false. */
2962 pc_in_unmapped_range (CORE_ADDR pc
, asection
*section
)
2964 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2968 if (overlay_debugging
)
2969 if (section
&& section_is_overlay (section
))
2971 size
= bfd_get_section_size_before_reloc (section
);
2972 if (section
->lma
<= pc
&& pc
< section
->lma
+ size
)
2978 /* Function: pc_in_mapped_range
2979 If PC falls into the vma range of SECTION, return true, else false. */
2982 pc_in_mapped_range (CORE_ADDR pc
, asection
*section
)
2984 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2988 if (overlay_debugging
)
2989 if (section
&& section_is_overlay (section
))
2991 size
= bfd_get_section_size_before_reloc (section
);
2992 if (section
->vma
<= pc
&& pc
< section
->vma
+ size
)
2999 /* Return true if the mapped ranges of sections A and B overlap, false
3002 sections_overlap (asection
*a
, asection
*b
)
3004 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3006 CORE_ADDR a_start
= a
->vma
;
3007 CORE_ADDR a_end
= a
->vma
+ bfd_get_section_size_before_reloc (a
);
3008 CORE_ADDR b_start
= b
->vma
;
3009 CORE_ADDR b_end
= b
->vma
+ bfd_get_section_size_before_reloc (b
);
3011 return (a_start
< b_end
&& b_start
< a_end
);
3014 /* Function: overlay_unmapped_address (PC, SECTION)
3015 Returns the address corresponding to PC in the unmapped (load) range.
3016 May be the same as PC. */
3019 overlay_unmapped_address (CORE_ADDR pc
, asection
*section
)
3021 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
3023 if (overlay_debugging
)
3024 if (section
&& section_is_overlay (section
) &&
3025 pc_in_mapped_range (pc
, section
))
3026 return pc
+ section
->lma
- section
->vma
;
3031 /* Function: overlay_mapped_address (PC, SECTION)
3032 Returns the address corresponding to PC in the mapped (runtime) range.
3033 May be the same as PC. */
3036 overlay_mapped_address (CORE_ADDR pc
, asection
*section
)
3038 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3040 if (overlay_debugging
)
3041 if (section
&& section_is_overlay (section
) &&
3042 pc_in_unmapped_range (pc
, section
))
3043 return pc
+ section
->vma
- section
->lma
;
3049 /* Function: symbol_overlayed_address
3050 Return one of two addresses (relative to the VMA or to the LMA),
3051 depending on whether the section is mapped or not. */
3054 symbol_overlayed_address (CORE_ADDR address
, asection
*section
)
3056 if (overlay_debugging
)
3058 /* If the symbol has no section, just return its regular address. */
3061 /* If the symbol's section is not an overlay, just return its address */
3062 if (!section_is_overlay (section
))
3064 /* If the symbol's section is mapped, just return its address */
3065 if (section_is_mapped (section
))
3068 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3069 * then return its LOADED address rather than its vma address!!
3071 return overlay_unmapped_address (address
, section
);
3076 /* Function: find_pc_overlay (PC)
3077 Return the best-match overlay section for PC:
3078 If PC matches a mapped overlay section's VMA, return that section.
3079 Else if PC matches an unmapped section's VMA, return that section.
3080 Else if PC matches an unmapped section's LMA, return that section. */
3083 find_pc_overlay (CORE_ADDR pc
)
3085 struct objfile
*objfile
;
3086 struct obj_section
*osect
, *best_match
= NULL
;
3088 if (overlay_debugging
)
3089 ALL_OBJSECTIONS (objfile
, osect
)
3090 if (section_is_overlay (osect
->the_bfd_section
))
3092 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
))
3094 if (overlay_is_mapped (osect
))
3095 return osect
->the_bfd_section
;
3099 else if (pc_in_unmapped_range (pc
, osect
->the_bfd_section
))
3102 return best_match
? best_match
->the_bfd_section
: NULL
;
3105 /* Function: find_pc_mapped_section (PC)
3106 If PC falls into the VMA address range of an overlay section that is
3107 currently marked as MAPPED, return that section. Else return NULL. */
3110 find_pc_mapped_section (CORE_ADDR pc
)
3112 struct objfile
*objfile
;
3113 struct obj_section
*osect
;
3115 if (overlay_debugging
)
3116 ALL_OBJSECTIONS (objfile
, osect
)
3117 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
) &&
3118 overlay_is_mapped (osect
))
3119 return osect
->the_bfd_section
;
3124 /* Function: list_overlays_command
3125 Print a list of mapped sections and their PC ranges */
3128 list_overlays_command (char *args
, int from_tty
)
3131 struct objfile
*objfile
;
3132 struct obj_section
*osect
;
3134 if (overlay_debugging
)
3135 ALL_OBJSECTIONS (objfile
, osect
)
3136 if (overlay_is_mapped (osect
))
3142 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3143 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3144 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3145 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3147 printf_filtered ("Section %s, loaded at ", name
);
3148 print_address_numeric (lma
, 1, gdb_stdout
);
3149 puts_filtered (" - ");
3150 print_address_numeric (lma
+ size
, 1, gdb_stdout
);
3151 printf_filtered (", mapped at ");
3152 print_address_numeric (vma
, 1, gdb_stdout
);
3153 puts_filtered (" - ");
3154 print_address_numeric (vma
+ size
, 1, gdb_stdout
);
3155 puts_filtered ("\n");
3160 printf_filtered ("No sections are mapped.\n");
3163 /* Function: map_overlay_command
3164 Mark the named section as mapped (ie. residing at its VMA address). */
3167 map_overlay_command (char *args
, int from_tty
)
3169 struct objfile
*objfile
, *objfile2
;
3170 struct obj_section
*sec
, *sec2
;
3173 if (!overlay_debugging
)
3175 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3176 the 'overlay manual' command.");
3178 if (args
== 0 || *args
== 0)
3179 error ("Argument required: name of an overlay section");
3181 /* First, find a section matching the user supplied argument */
3182 ALL_OBJSECTIONS (objfile
, sec
)
3183 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3185 /* Now, check to see if the section is an overlay. */
3186 bfdsec
= sec
->the_bfd_section
;
3187 if (!section_is_overlay (bfdsec
))
3188 continue; /* not an overlay section */
3190 /* Mark the overlay as "mapped" */
3191 sec
->ovly_mapped
= 1;
3193 /* Next, make a pass and unmap any sections that are
3194 overlapped by this new section: */
3195 ALL_OBJSECTIONS (objfile2
, sec2
)
3196 if (sec2
->ovly_mapped
3198 && sec
->the_bfd_section
!= sec2
->the_bfd_section
3199 && sections_overlap (sec
->the_bfd_section
,
3200 sec2
->the_bfd_section
))
3203 printf_unfiltered ("Note: section %s unmapped by overlap\n",
3204 bfd_section_name (objfile
->obfd
,
3205 sec2
->the_bfd_section
));
3206 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
3210 error ("No overlay section called %s", args
);
3213 /* Function: unmap_overlay_command
3214 Mark the overlay section as unmapped
3215 (ie. resident in its LMA address range, rather than the VMA range). */
3218 unmap_overlay_command (char *args
, int from_tty
)
3220 struct objfile
*objfile
;
3221 struct obj_section
*sec
;
3223 if (!overlay_debugging
)
3225 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3226 the 'overlay manual' command.");
3228 if (args
== 0 || *args
== 0)
3229 error ("Argument required: name of an overlay section");
3231 /* First, find a section matching the user supplied argument */
3232 ALL_OBJSECTIONS (objfile
, sec
)
3233 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3235 if (!sec
->ovly_mapped
)
3236 error ("Section %s is not mapped", args
);
3237 sec
->ovly_mapped
= 0;
3240 error ("No overlay section called %s", args
);
3243 /* Function: overlay_auto_command
3244 A utility command to turn on overlay debugging.
3245 Possibly this should be done via a set/show command. */
3248 overlay_auto_command (char *args
, int from_tty
)
3250 overlay_debugging
= ovly_auto
;
3251 enable_overlay_breakpoints ();
3253 printf_unfiltered ("Automatic overlay debugging enabled.");
3256 /* Function: overlay_manual_command
3257 A utility command to turn on overlay debugging.
3258 Possibly this should be done via a set/show command. */
3261 overlay_manual_command (char *args
, int from_tty
)
3263 overlay_debugging
= ovly_on
;
3264 disable_overlay_breakpoints ();
3266 printf_unfiltered ("Overlay debugging enabled.");
3269 /* Function: overlay_off_command
3270 A utility command to turn on overlay debugging.
3271 Possibly this should be done via a set/show command. */
3274 overlay_off_command (char *args
, int from_tty
)
3276 overlay_debugging
= ovly_off
;
3277 disable_overlay_breakpoints ();
3279 printf_unfiltered ("Overlay debugging disabled.");
3283 overlay_load_command (char *args
, int from_tty
)
3285 if (target_overlay_update
)
3286 (*target_overlay_update
) (NULL
);
3288 error ("This target does not know how to read its overlay state.");
3291 /* Function: overlay_command
3292 A place-holder for a mis-typed command */
3294 /* Command list chain containing all defined "overlay" subcommands. */
3295 struct cmd_list_element
*overlaylist
;
3298 overlay_command (char *args
, int from_tty
)
3301 ("\"overlay\" must be followed by the name of an overlay command.\n");
3302 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3306 /* Target Overlays for the "Simplest" overlay manager:
3308 This is GDB's default target overlay layer. It works with the
3309 minimal overlay manager supplied as an example by Cygnus. The
3310 entry point is via a function pointer "target_overlay_update",
3311 so targets that use a different runtime overlay manager can
3312 substitute their own overlay_update function and take over the
3315 The overlay_update function pokes around in the target's data structures
3316 to see what overlays are mapped, and updates GDB's overlay mapping with
3319 In this simple implementation, the target data structures are as follows:
3320 unsigned _novlys; /# number of overlay sections #/
3321 unsigned _ovly_table[_novlys][4] = {
3322 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3323 {..., ..., ..., ...},
3325 unsigned _novly_regions; /# number of overlay regions #/
3326 unsigned _ovly_region_table[_novly_regions][3] = {
3327 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3330 These functions will attempt to update GDB's mappedness state in the
3331 symbol section table, based on the target's mappedness state.
3333 To do this, we keep a cached copy of the target's _ovly_table, and
3334 attempt to detect when the cached copy is invalidated. The main
3335 entry point is "simple_overlay_update(SECT), which looks up SECT in
3336 the cached table and re-reads only the entry for that section from
3337 the target (whenever possible).
3340 /* Cached, dynamically allocated copies of the target data structures: */
3341 static unsigned (*cache_ovly_table
)[4] = 0;
3343 static unsigned (*cache_ovly_region_table
)[3] = 0;
3345 static unsigned cache_novlys
= 0;
3347 static unsigned cache_novly_regions
= 0;
3349 static CORE_ADDR cache_ovly_table_base
= 0;
3351 static CORE_ADDR cache_ovly_region_table_base
= 0;
3355 VMA
, SIZE
, LMA
, MAPPED
3357 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
3359 /* Throw away the cached copy of _ovly_table */
3361 simple_free_overlay_table (void)
3363 if (cache_ovly_table
)
3364 xfree (cache_ovly_table
);
3366 cache_ovly_table
= NULL
;
3367 cache_ovly_table_base
= 0;
3371 /* Throw away the cached copy of _ovly_region_table */
3373 simple_free_overlay_region_table (void)
3375 if (cache_ovly_region_table
)
3376 xfree (cache_ovly_region_table
);
3377 cache_novly_regions
= 0;
3378 cache_ovly_region_table
= NULL
;
3379 cache_ovly_region_table_base
= 0;
3383 /* Read an array of ints from the target into a local buffer.
3384 Convert to host order. int LEN is number of ints */
3386 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
, int len
)
3388 /* FIXME (alloca): Not safe if array is very large. */
3389 char *buf
= alloca (len
* TARGET_LONG_BYTES
);
3392 read_memory (memaddr
, buf
, len
* TARGET_LONG_BYTES
);
3393 for (i
= 0; i
< len
; i
++)
3394 myaddr
[i
] = extract_unsigned_integer (TARGET_LONG_BYTES
* i
+ buf
,
3398 /* Find and grab a copy of the target _ovly_table
3399 (and _novlys, which is needed for the table's size) */
3401 simple_read_overlay_table (void)
3403 struct minimal_symbol
*novlys_msym
, *ovly_table_msym
;
3405 simple_free_overlay_table ();
3406 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3409 error ("Error reading inferior's overlay table: "
3410 "couldn't find `_novlys' variable\n"
3411 "in inferior. Use `overlay manual' mode.");
3415 ovly_table_msym
= lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3416 if (! ovly_table_msym
)
3418 error ("Error reading inferior's overlay table: couldn't find "
3419 "`_ovly_table' array\n"
3420 "in inferior. Use `overlay manual' mode.");
3424 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
), 4);
3426 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3427 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3428 read_target_long_array (cache_ovly_table_base
,
3429 (int *) cache_ovly_table
,
3432 return 1; /* SUCCESS */
3436 /* Find and grab a copy of the target _ovly_region_table
3437 (and _novly_regions, which is needed for the table's size) */
3439 simple_read_overlay_region_table (void)
3441 struct minimal_symbol
*msym
;
3443 simple_free_overlay_region_table ();
3444 msym
= lookup_minimal_symbol ("_novly_regions", NULL
, NULL
);
3446 cache_novly_regions
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
3448 return 0; /* failure */
3449 cache_ovly_region_table
= (void *) xmalloc (cache_novly_regions
* 12);
3450 if (cache_ovly_region_table
!= NULL
)
3452 msym
= lookup_minimal_symbol ("_ovly_region_table", NULL
, NULL
);
3455 cache_ovly_region_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3456 read_target_long_array (cache_ovly_region_table_base
,
3457 (int *) cache_ovly_region_table
,
3458 cache_novly_regions
* 3);
3461 return 0; /* failure */
3464 return 0; /* failure */
3465 return 1; /* SUCCESS */
3469 /* Function: simple_overlay_update_1
3470 A helper function for simple_overlay_update. Assuming a cached copy
3471 of _ovly_table exists, look through it to find an entry whose vma,
3472 lma and size match those of OSECT. Re-read the entry and make sure
3473 it still matches OSECT (else the table may no longer be valid).
3474 Set OSECT's mapped state to match the entry. Return: 1 for
3475 success, 0 for failure. */
3478 simple_overlay_update_1 (struct obj_section
*osect
)
3481 bfd
*obfd
= osect
->objfile
->obfd
;
3482 asection
*bsect
= osect
->the_bfd_section
;
3484 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3485 for (i
= 0; i
< cache_novlys
; i
++)
3486 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3487 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3488 /* && cache_ovly_table[i][SIZE] == size */ )
3490 read_target_long_array (cache_ovly_table_base
+ i
* TARGET_LONG_BYTES
,
3491 (int *) cache_ovly_table
[i
], 4);
3492 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3493 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3494 /* && cache_ovly_table[i][SIZE] == size */ )
3496 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3499 else /* Warning! Warning! Target's ovly table has changed! */
3505 /* Function: simple_overlay_update
3506 If OSECT is NULL, then update all sections' mapped state
3507 (after re-reading the entire target _ovly_table).
3508 If OSECT is non-NULL, then try to find a matching entry in the
3509 cached ovly_table and update only OSECT's mapped state.
3510 If a cached entry can't be found or the cache isn't valid, then
3511 re-read the entire cache, and go ahead and update all sections. */
3514 simple_overlay_update (struct obj_section
*osect
)
3516 struct objfile
*objfile
;
3518 /* Were we given an osect to look up? NULL means do all of them. */
3520 /* Have we got a cached copy of the target's overlay table? */
3521 if (cache_ovly_table
!= NULL
)
3522 /* Does its cached location match what's currently in the symtab? */
3523 if (cache_ovly_table_base
==
3524 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL
, NULL
)))
3525 /* Then go ahead and try to look up this single section in the cache */
3526 if (simple_overlay_update_1 (osect
))
3527 /* Found it! We're done. */
3530 /* Cached table no good: need to read the entire table anew.
3531 Or else we want all the sections, in which case it's actually
3532 more efficient to read the whole table in one block anyway. */
3534 if (! simple_read_overlay_table ())
3537 /* Now may as well update all sections, even if only one was requested. */
3538 ALL_OBJSECTIONS (objfile
, osect
)
3539 if (section_is_overlay (osect
->the_bfd_section
))
3542 bfd
*obfd
= osect
->objfile
->obfd
;
3543 asection
*bsect
= osect
->the_bfd_section
;
3545 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3546 for (i
= 0; i
< cache_novlys
; i
++)
3547 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3548 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3549 /* && cache_ovly_table[i][SIZE] == size */ )
3550 { /* obj_section matches i'th entry in ovly_table */
3551 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3552 break; /* finished with inner for loop: break out */
3557 /* Set the output sections and output offsets for section SECTP in
3558 ABFD. The relocation code in BFD will read these offsets, so we
3559 need to be sure they're initialized. We map each section to itself,
3560 with no offset; this means that SECTP->vma will be honored. */
3563 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3565 sectp
->output_section
= sectp
;
3566 sectp
->output_offset
= 0;
3569 /* Relocate the contents of a debug section SECTP in ABFD. The
3570 contents are stored in BUF if it is non-NULL, or returned in a
3571 malloc'd buffer otherwise.
3573 For some platforms and debug info formats, shared libraries contain
3574 relocations against the debug sections (particularly for DWARF-2;
3575 one affected platform is PowerPC GNU/Linux, although it depends on
3576 the version of the linker in use). Also, ELF object files naturally
3577 have unresolved relocations for their debug sections. We need to apply
3578 the relocations in order to get the locations of symbols correct. */
3581 symfile_relocate_debug_section (bfd
*abfd
, asection
*sectp
, bfd_byte
*buf
)
3583 /* We're only interested in debugging sections with relocation
3585 if ((sectp
->flags
& SEC_RELOC
) == 0)
3587 if ((sectp
->flags
& SEC_DEBUGGING
) == 0)
3590 /* We will handle section offsets properly elsewhere, so relocate as if
3591 all sections begin at 0. */
3592 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3594 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3598 _initialize_symfile (void)
3600 struct cmd_list_element
*c
;
3602 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
,
3603 "Load symbol table from executable file FILE.\n\
3604 The `file' command can also load symbol tables, as well as setting the file\n\
3605 to execute.", &cmdlist
);
3606 set_cmd_completer (c
, filename_completer
);
3608 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
,
3609 "Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3610 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3611 ADDR is the starting address of the file's text.\n\
3612 The optional arguments are section-name section-address pairs and\n\
3613 should be specified if the data and bss segments are not contiguous\n\
3614 with the text. SECT is a section name to be loaded at SECT_ADDR.",
3616 set_cmd_completer (c
, filename_completer
);
3618 c
= add_cmd ("add-symbol-file-from-memory", class_files
,
3619 add_symbol_file_from_memory_command
,
3621 Load the symbols out of memory from a dynamically loaded object file.\n\
3622 Give an expression for the address of the file's shared object file header.",
3625 c
= add_cmd ("add-shared-symbol-files", class_files
,
3626 add_shared_symbol_files_command
,
3627 "Load the symbols from shared objects in the dynamic linker's link map.",
3629 c
= add_alias_cmd ("assf", "add-shared-symbol-files", class_files
, 1,
3632 c
= add_cmd ("load", class_files
, load_command
,
3633 "Dynamically load FILE into the running program, and record its symbols\n\
3634 for access from GDB.", &cmdlist
);
3635 set_cmd_completer (c
, filename_completer
);
3638 (add_set_cmd ("symbol-reloading", class_support
, var_boolean
,
3639 (char *) &symbol_reloading
,
3640 "Set dynamic symbol table reloading multiple times in one run.",
3644 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3645 "Commands for debugging overlays.", &overlaylist
,
3646 "overlay ", 0, &cmdlist
);
3648 add_com_alias ("ovly", "overlay", class_alias
, 1);
3649 add_com_alias ("ov", "overlay", class_alias
, 1);
3651 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3652 "Assert that an overlay section is mapped.", &overlaylist
);
3654 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3655 "Assert that an overlay section is unmapped.", &overlaylist
);
3657 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3658 "List mappings of overlay sections.", &overlaylist
);
3660 add_cmd ("manual", class_support
, overlay_manual_command
,
3661 "Enable overlay debugging.", &overlaylist
);
3662 add_cmd ("off", class_support
, overlay_off_command
,
3663 "Disable overlay debugging.", &overlaylist
);
3664 add_cmd ("auto", class_support
, overlay_auto_command
,
3665 "Enable automatic overlay debugging.", &overlaylist
);
3666 add_cmd ("load-target", class_support
, overlay_load_command
,
3667 "Read the overlay mapping state from the target.", &overlaylist
);
3669 /* Filename extension to source language lookup table: */
3670 init_filename_language_table ();
3671 c
= add_set_cmd ("extension-language", class_files
, var_string_noescape
,
3673 "Set mapping between filename extension and source language.\n\
3674 Usage: set extension-language .foo bar",
3676 set_cmd_cfunc (c
, set_ext_lang_command
);
3678 add_info ("extensions", info_ext_lang_command
,
3679 "All filename extensions associated with a source language.");
3682 (add_set_cmd ("download-write-size", class_obscure
,
3683 var_integer
, (char *) &download_write_size
,
3684 "Set the write size used when downloading a program.\n"
3685 "Only used when downloading a program onto a remote\n"
3686 "target. Specify zero, or a negative value, to disable\n"
3687 "blocked writes. The actual size of each transfer is also\n"
3688 "limited by the size of the target packet and the memory\n"
3693 debug_file_directory
= xstrdup (DEBUGDIR
);
3695 ("debug-file-directory", class_support
, var_string
,
3696 (char *) &debug_file_directory
,
3697 "Set the directory where separate debug symbols are searched for.\n"
3698 "Separate debug symbols are first searched for in the same\n"
3699 "directory as the binary, then in the `" DEBUG_SUBDIRECTORY
3701 "and lastly at the path of the directory of the binary with\n"
3702 "the global debug-file directory prepended\n",
3704 add_show_from_set (c
, &showlist
);
3705 set_cmd_completer (c
, filename_completer
);