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 (*ui_load_progress_hook
) (const char *section
, unsigned long num
);
76 void (*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
) (char *);
82 void (*post_add_symbol_hook
) (void);
83 void (*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 NAME is the file name (which will be tilde-expanded and made
764 absolute herein) (but we don't free or modify NAME itself).
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 (char *name
, 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
;
788 struct section_addr_info
*orig_addrs
;
789 struct cleanup
*my_cleanups
;
791 /* Open a bfd for the file, and give user a chance to burp if we'd be
792 interactively wiping out any existing symbols. */
794 abfd
= symfile_bfd_open (name
);
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
);
804 orig_addrs
= alloc_section_addr_info (bfd_count_sections (abfd
));
805 my_cleanups
= make_cleanup (xfree
, orig_addrs
);
809 orig_addrs
->num_sections
= addrs
->num_sections
;
810 for (i
= 0; i
< addrs
->num_sections
; i
++)
811 orig_addrs
->other
[i
] = addrs
->other
[i
];
814 /* We either created a new mapped symbol table, mapped an existing
815 symbol table file which has not had initial symbol reading
816 performed, or need to read an unmapped symbol table. */
817 if (from_tty
|| info_verbose
)
819 if (pre_add_symbol_hook
)
820 pre_add_symbol_hook (name
);
823 printf_unfiltered ("Reading symbols from %s...", name
);
825 gdb_flush (gdb_stdout
);
828 syms_from_objfile (objfile
, addrs
, offsets
, num_offsets
,
831 /* We now have at least a partial symbol table. Check to see if the
832 user requested that all symbols be read on initial access via either
833 the gdb startup command line or on a per symbol file basis. Expand
834 all partial symbol tables for this objfile if so. */
836 if ((flags
& OBJF_READNOW
) || readnow_symbol_files
)
838 if (from_tty
|| info_verbose
)
840 printf_unfiltered ("expanding to full symbols...");
842 gdb_flush (gdb_stdout
);
845 for (psymtab
= objfile
->psymtabs
;
847 psymtab
= psymtab
->next
)
849 psymtab_to_symtab (psymtab
);
853 debugfile
= find_separate_debug_file (objfile
);
858 objfile
->separate_debug_objfile
859 = symbol_file_add (debugfile
, from_tty
, orig_addrs
, 0, flags
);
863 objfile
->separate_debug_objfile
864 = symbol_file_add (debugfile
, from_tty
, NULL
, 0, flags
);
866 objfile
->separate_debug_objfile
->separate_debug_objfile_backlink
869 /* Put the separate debug object before the normal one, this is so that
870 usage of the ALL_OBJFILES_SAFE macro will stay safe. */
871 put_objfile_before (objfile
->separate_debug_objfile
, objfile
);
876 if (!have_partial_symbols () && !have_full_symbols ())
879 printf_unfiltered ("(no debugging symbols found)...");
883 if (from_tty
|| info_verbose
)
885 if (post_add_symbol_hook
)
886 post_add_symbol_hook ();
889 printf_unfiltered ("done.\n");
893 /* We print some messages regardless of whether 'from_tty ||
894 info_verbose' is true, so make sure they go out at the right
896 gdb_flush (gdb_stdout
);
898 do_cleanups (my_cleanups
);
900 if (objfile
->sf
== NULL
)
901 return objfile
; /* No symbols. */
903 new_symfile_objfile (objfile
, mainline
, from_tty
);
905 if (target_new_objfile_hook
)
906 target_new_objfile_hook (objfile
);
912 /* Process a symbol file, as either the main file or as a dynamically
913 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
916 symbol_file_add (char *name
, int from_tty
, struct section_addr_info
*addrs
,
917 int mainline
, int flags
)
919 return symbol_file_add_with_addrs_or_offsets (name
, from_tty
, addrs
, 0, 0,
924 /* Call symbol_file_add() with default values and update whatever is
925 affected by the loading of a new main().
926 Used when the file is supplied in the gdb command line
927 and by some targets with special loading requirements.
928 The auxiliary function, symbol_file_add_main_1(), has the flags
929 argument for the switches that can only be specified in the symbol_file
933 symbol_file_add_main (char *args
, int from_tty
)
935 symbol_file_add_main_1 (args
, from_tty
, 0);
939 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
941 symbol_file_add (args
, from_tty
, NULL
, 1, flags
);
944 RESET_HP_UX_GLOBALS ();
947 /* Getting new symbols may change our opinion about
948 what is frameless. */
949 reinit_frame_cache ();
951 set_initial_language ();
955 symbol_file_clear (int from_tty
)
957 if ((have_full_symbols () || have_partial_symbols ())
959 && !query ("Discard symbol table from `%s'? ",
960 symfile_objfile
->name
))
961 error ("Not confirmed.");
962 free_all_objfiles ();
964 /* solib descriptors may have handles to objfiles. Since their
965 storage has just been released, we'd better wipe the solib
968 #if defined(SOLIB_RESTART)
972 symfile_objfile
= NULL
;
974 printf_unfiltered ("No symbol file now.\n");
976 RESET_HP_UX_GLOBALS ();
981 get_debug_link_info (struct objfile
*objfile
, unsigned long *crc32_out
)
984 bfd_size_type debuglink_size
;
990 sect
= bfd_get_section_by_name (objfile
->obfd
, ".gnu_debuglink");
995 debuglink_size
= bfd_section_size (objfile
->obfd
, sect
);
997 contents
= xmalloc (debuglink_size
);
998 bfd_get_section_contents (objfile
->obfd
, sect
, contents
,
999 (file_ptr
)0, (bfd_size_type
)debuglink_size
);
1001 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1002 crc_offset
= strlen (contents
) + 1;
1003 crc_offset
= (crc_offset
+ 3) & ~3;
1005 crc32
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) (contents
+ crc_offset
));
1012 separate_debug_file_exists (const char *name
, unsigned long crc
)
1014 unsigned long file_crc
= 0;
1016 char buffer
[8*1024];
1019 fd
= open (name
, O_RDONLY
| O_BINARY
);
1023 while ((count
= read (fd
, buffer
, sizeof (buffer
))) > 0)
1024 file_crc
= gnu_debuglink_crc32 (file_crc
, buffer
, count
);
1028 return crc
== file_crc
;
1031 static char *debug_file_directory
= NULL
;
1033 #if ! defined (DEBUG_SUBDIRECTORY)
1034 #define DEBUG_SUBDIRECTORY ".debug"
1038 find_separate_debug_file (struct objfile
*objfile
)
1045 bfd_size_type debuglink_size
;
1046 unsigned long crc32
;
1049 basename
= get_debug_link_info (objfile
, &crc32
);
1051 if (basename
== NULL
)
1054 dir
= xstrdup (objfile
->name
);
1056 /* Strip off the final filename part, leaving the directory name,
1057 followed by a slash. Objfile names should always be absolute and
1058 tilde-expanded, so there should always be a slash in there
1060 for (i
= strlen(dir
) - 1; i
>= 0; i
--)
1062 if (IS_DIR_SEPARATOR (dir
[i
]))
1065 gdb_assert (i
>= 0 && IS_DIR_SEPARATOR (dir
[i
]));
1068 debugfile
= alloca (strlen (debug_file_directory
) + 1
1070 + strlen (DEBUG_SUBDIRECTORY
)
1075 /* First try in the same directory as the original file. */
1076 strcpy (debugfile
, dir
);
1077 strcat (debugfile
, basename
);
1079 if (separate_debug_file_exists (debugfile
, crc32
))
1083 return xstrdup (debugfile
);
1086 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1087 strcpy (debugfile
, dir
);
1088 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1089 strcat (debugfile
, "/");
1090 strcat (debugfile
, basename
);
1092 if (separate_debug_file_exists (debugfile
, crc32
))
1096 return xstrdup (debugfile
);
1099 /* Then try in the global debugfile directory. */
1100 strcpy (debugfile
, debug_file_directory
);
1101 strcat (debugfile
, "/");
1102 strcat (debugfile
, dir
);
1103 strcat (debugfile
, basename
);
1105 if (separate_debug_file_exists (debugfile
, crc32
))
1109 return xstrdup (debugfile
);
1118 /* This is the symbol-file command. Read the file, analyze its
1119 symbols, and add a struct symtab to a symtab list. The syntax of
1120 the command is rather bizarre--(1) buildargv implements various
1121 quoting conventions which are undocumented and have little or
1122 nothing in common with the way things are quoted (or not quoted)
1123 elsewhere in GDB, (2) options are used, which are not generally
1124 used in GDB (perhaps "set mapped on", "set readnow on" would be
1125 better), (3) the order of options matters, which is contrary to GNU
1126 conventions (because it is confusing and inconvenient). */
1127 /* Note: ezannoni 2000-04-17. This function used to have support for
1128 rombug (see remote-os9k.c). It consisted of a call to target_link()
1129 (target.c) to get the address of the text segment from the target,
1130 and pass that to symbol_file_add(). This is no longer supported. */
1133 symbol_file_command (char *args
, int from_tty
)
1137 struct cleanup
*cleanups
;
1138 int flags
= OBJF_USERLOADED
;
1144 symbol_file_clear (from_tty
);
1148 if ((argv
= buildargv (args
)) == NULL
)
1152 cleanups
= make_cleanup_freeargv (argv
);
1153 while (*argv
!= NULL
)
1155 if (strcmp (*argv
, "-readnow") == 0)
1156 flags
|= OBJF_READNOW
;
1157 else if (**argv
== '-')
1158 error ("unknown option `%s'", *argv
);
1163 symbol_file_add_main_1 (name
, from_tty
, flags
);
1170 error ("no symbol file name was specified");
1172 do_cleanups (cleanups
);
1176 /* Set the initial language.
1178 A better solution would be to record the language in the psymtab when reading
1179 partial symbols, and then use it (if known) to set the language. This would
1180 be a win for formats that encode the language in an easily discoverable place,
1181 such as DWARF. For stabs, we can jump through hoops looking for specially
1182 named symbols or try to intuit the language from the specific type of stabs
1183 we find, but we can't do that until later when we read in full symbols.
1187 set_initial_language (void)
1189 struct partial_symtab
*pst
;
1190 enum language lang
= language_unknown
;
1192 pst
= find_main_psymtab ();
1195 if (pst
->filename
!= NULL
)
1197 lang
= deduce_language_from_filename (pst
->filename
);
1199 if (lang
== language_unknown
)
1201 /* Make C the default language */
1204 set_language (lang
);
1205 expected_language
= current_language
; /* Don't warn the user */
1209 /* Open file specified by NAME and hand it off to BFD for preliminary
1210 analysis. Result is a newly initialized bfd *, which includes a newly
1211 malloc'd` copy of NAME (tilde-expanded and made absolute).
1212 In case of trouble, error() is called. */
1215 symfile_bfd_open (char *name
)
1219 char *absolute_name
;
1223 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy */
1225 /* Look down path for it, allocate 2nd new malloc'd copy. */
1226 desc
= openp (getenv ("PATH"), 1, name
, O_RDONLY
| O_BINARY
, 0, &absolute_name
);
1227 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1230 char *exename
= alloca (strlen (name
) + 5);
1231 strcat (strcpy (exename
, name
), ".exe");
1232 desc
= openp (getenv ("PATH"), 1, exename
, O_RDONLY
| O_BINARY
,
1238 make_cleanup (xfree
, name
);
1239 perror_with_name (name
);
1241 xfree (name
); /* Free 1st new malloc'd copy */
1242 name
= absolute_name
; /* Keep 2nd malloc'd copy in bfd */
1243 /* It'll be freed in free_objfile(). */
1245 sym_bfd
= bfd_fdopenr (name
, gnutarget
, desc
);
1249 make_cleanup (xfree
, name
);
1250 error ("\"%s\": can't open to read symbols: %s.", name
,
1251 bfd_errmsg (bfd_get_error ()));
1253 bfd_set_cacheable (sym_bfd
, 1);
1255 if (!bfd_check_format (sym_bfd
, bfd_object
))
1257 /* FIXME: should be checking for errors from bfd_close (for one thing,
1258 on error it does not free all the storage associated with the
1260 bfd_close (sym_bfd
); /* This also closes desc */
1261 make_cleanup (xfree
, name
);
1262 error ("\"%s\": can't read symbols: %s.", name
,
1263 bfd_errmsg (bfd_get_error ()));
1268 /* Return the section index for the given section name. Return -1 if
1269 the section was not found. */
1271 get_section_index (struct objfile
*objfile
, char *section_name
)
1273 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1280 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1281 startup by the _initialize routine in each object file format reader,
1282 to register information about each format the the reader is prepared
1286 add_symtab_fns (struct sym_fns
*sf
)
1288 sf
->next
= symtab_fns
;
1293 /* Initialize to read symbols from the symbol file sym_bfd. It either
1294 returns or calls error(). The result is an initialized struct sym_fns
1295 in the objfile structure, that contains cached information about the
1299 find_sym_fns (struct objfile
*objfile
)
1302 enum bfd_flavour our_flavour
= bfd_get_flavour (objfile
->obfd
);
1303 char *our_target
= bfd_get_target (objfile
->obfd
);
1305 if (our_flavour
== bfd_target_srec_flavour
1306 || our_flavour
== bfd_target_ihex_flavour
1307 || our_flavour
== bfd_target_tekhex_flavour
)
1308 return; /* No symbols. */
1310 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
->next
)
1312 if (our_flavour
== sf
->sym_flavour
)
1318 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
1319 bfd_get_target (objfile
->obfd
));
1322 /* This function runs the load command of our current target. */
1325 load_command (char *arg
, int from_tty
)
1328 arg
= get_exec_file (1);
1329 target_load (arg
, from_tty
);
1331 /* After re-loading the executable, we don't really know which
1332 overlays are mapped any more. */
1333 overlay_cache_invalid
= 1;
1336 /* This version of "load" should be usable for any target. Currently
1337 it is just used for remote targets, not inftarg.c or core files,
1338 on the theory that only in that case is it useful.
1340 Avoiding xmodem and the like seems like a win (a) because we don't have
1341 to worry about finding it, and (b) On VMS, fork() is very slow and so
1342 we don't want to run a subprocess. On the other hand, I'm not sure how
1343 performance compares. */
1345 static int download_write_size
= 512;
1346 static int validate_download
= 0;
1348 /* Callback service function for generic_load (bfd_map_over_sections). */
1351 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1353 bfd_size_type
*sum
= data
;
1355 *sum
+= bfd_get_section_size_before_reloc (asec
);
1358 /* Opaque data for load_section_callback. */
1359 struct load_section_data
{
1360 unsigned long load_offset
;
1361 unsigned long write_count
;
1362 unsigned long data_count
;
1363 bfd_size_type total_size
;
1366 /* Callback service function for generic_load (bfd_map_over_sections). */
1369 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1371 struct load_section_data
*args
= data
;
1373 if (bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
)
1375 bfd_size_type size
= bfd_get_section_size_before_reloc (asec
);
1379 struct cleanup
*old_chain
;
1380 CORE_ADDR lma
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1381 bfd_size_type block_size
;
1383 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1386 if (download_write_size
> 0 && size
> download_write_size
)
1387 block_size
= download_write_size
;
1391 buffer
= xmalloc (size
);
1392 old_chain
= make_cleanup (xfree
, buffer
);
1394 /* Is this really necessary? I guess it gives the user something
1395 to look at during a long download. */
1396 ui_out_message (uiout
, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1397 sect_name
, paddr_nz (size
), paddr_nz (lma
));
1399 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1405 bfd_size_type this_transfer
= size
- sent
;
1407 if (this_transfer
>= block_size
)
1408 this_transfer
= block_size
;
1409 len
= target_write_memory_partial (lma
, buffer
,
1410 this_transfer
, &err
);
1413 if (validate_download
)
1415 /* Broken memories and broken monitors manifest
1416 themselves here when bring new computers to
1417 life. This doubles already slow downloads. */
1418 /* NOTE: cagney/1999-10-18: A more efficient
1419 implementation might add a verify_memory()
1420 method to the target vector and then use
1421 that. remote.c could implement that method
1422 using the ``qCRC'' packet. */
1423 char *check
= xmalloc (len
);
1424 struct cleanup
*verify_cleanups
=
1425 make_cleanup (xfree
, check
);
1427 if (target_read_memory (lma
, check
, len
) != 0)
1428 error ("Download verify read failed at 0x%s",
1430 if (memcmp (buffer
, check
, len
) != 0)
1431 error ("Download verify compare failed at 0x%s",
1433 do_cleanups (verify_cleanups
);
1435 args
->data_count
+= len
;
1438 args
->write_count
+= 1;
1441 || (ui_load_progress_hook
!= NULL
1442 && ui_load_progress_hook (sect_name
, sent
)))
1443 error ("Canceled the download");
1445 if (show_load_progress
!= NULL
)
1446 show_load_progress (sect_name
, sent
, size
,
1447 args
->data_count
, args
->total_size
);
1449 while (sent
< size
);
1452 error ("Memory access error while loading section %s.", sect_name
);
1454 do_cleanups (old_chain
);
1460 generic_load (char *args
, int from_tty
)
1464 time_t start_time
, end_time
; /* Start and end times of download */
1466 struct cleanup
*old_cleanups
;
1468 struct load_section_data cbdata
;
1471 cbdata
.load_offset
= 0; /* Offset to add to vma for each section. */
1472 cbdata
.write_count
= 0; /* Number of writes needed. */
1473 cbdata
.data_count
= 0; /* Number of bytes written to target memory. */
1474 cbdata
.total_size
= 0; /* Total size of all bfd sectors. */
1476 /* Parse the input argument - the user can specify a load offset as
1477 a second argument. */
1478 filename
= xmalloc (strlen (args
) + 1);
1479 old_cleanups
= make_cleanup (xfree
, filename
);
1480 strcpy (filename
, args
);
1481 offptr
= strchr (filename
, ' ');
1486 cbdata
.load_offset
= strtoul (offptr
, &endptr
, 0);
1487 if (offptr
== endptr
)
1488 error ("Invalid download offset:%s\n", offptr
);
1492 cbdata
.load_offset
= 0;
1494 /* Open the file for loading. */
1495 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
1496 if (loadfile_bfd
== NULL
)
1498 perror_with_name (filename
);
1502 /* FIXME: should be checking for errors from bfd_close (for one thing,
1503 on error it does not free all the storage associated with the
1505 make_cleanup_bfd_close (loadfile_bfd
);
1507 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
1509 error ("\"%s\" is not an object file: %s", filename
,
1510 bfd_errmsg (bfd_get_error ()));
1513 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
1514 (void *) &cbdata
.total_size
);
1516 start_time
= time (NULL
);
1518 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
1520 end_time
= time (NULL
);
1522 entry
= bfd_get_start_address (loadfile_bfd
);
1523 ui_out_text (uiout
, "Start address ");
1524 ui_out_field_fmt (uiout
, "address", "0x%s", paddr_nz (entry
));
1525 ui_out_text (uiout
, ", load size ");
1526 ui_out_field_fmt (uiout
, "load-size", "%lu", cbdata
.data_count
);
1527 ui_out_text (uiout
, "\n");
1528 /* We were doing this in remote-mips.c, I suspect it is right
1529 for other targets too. */
1532 /* FIXME: are we supposed to call symbol_file_add or not? According
1533 to a comment from remote-mips.c (where a call to symbol_file_add
1534 was commented out), making the call confuses GDB if more than one
1535 file is loaded in. Some targets do (e.g., remote-vx.c) but
1536 others don't (or didn't - perhaphs they have all been deleted). */
1538 print_transfer_performance (gdb_stdout
, cbdata
.data_count
,
1539 cbdata
.write_count
, end_time
- start_time
);
1541 do_cleanups (old_cleanups
);
1544 /* Report how fast the transfer went. */
1546 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1547 replaced by print_transfer_performance (with a very different
1548 function signature). */
1551 report_transfer_performance (unsigned long data_count
, time_t start_time
,
1554 print_transfer_performance (gdb_stdout
, data_count
,
1555 end_time
- start_time
, 0);
1559 print_transfer_performance (struct ui_file
*stream
,
1560 unsigned long data_count
,
1561 unsigned long write_count
,
1562 unsigned long time_count
)
1564 ui_out_text (uiout
, "Transfer rate: ");
1567 ui_out_field_fmt (uiout
, "transfer-rate", "%lu",
1568 (data_count
* 8) / time_count
);
1569 ui_out_text (uiout
, " bits/sec");
1573 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
1574 ui_out_text (uiout
, " bits in <1 sec");
1576 if (write_count
> 0)
1578 ui_out_text (uiout
, ", ");
1579 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
1580 ui_out_text (uiout
, " bytes/write");
1582 ui_out_text (uiout
, ".\n");
1585 /* This function allows the addition of incrementally linked object files.
1586 It does not modify any state in the target, only in the debugger. */
1587 /* Note: ezannoni 2000-04-13 This function/command used to have a
1588 special case syntax for the rombug target (Rombug is the boot
1589 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
1590 rombug case, the user doesn't need to supply a text address,
1591 instead a call to target_link() (in target.c) would supply the
1592 value to use. We are now discontinuing this type of ad hoc syntax. */
1595 add_symbol_file_command (char *args
, int from_tty
)
1597 char *filename
= NULL
;
1598 int flags
= OBJF_USERLOADED
;
1600 int expecting_option
= 0;
1601 int section_index
= 0;
1605 int expecting_sec_name
= 0;
1606 int expecting_sec_addr
= 0;
1614 struct section_addr_info
*section_addrs
;
1615 struct sect_opt
*sect_opts
= NULL
;
1616 size_t num_sect_opts
= 0;
1617 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
1620 sect_opts
= (struct sect_opt
*) xmalloc (num_sect_opts
1621 * sizeof (struct sect_opt
));
1626 error ("add-symbol-file takes a file name and an address");
1628 /* Make a copy of the string that we can safely write into. */
1629 args
= xstrdup (args
);
1631 while (*args
!= '\000')
1633 /* Any leading spaces? */
1634 while (isspace (*args
))
1637 /* Point arg to the beginning of the argument. */
1640 /* Move args pointer over the argument. */
1641 while ((*args
!= '\000') && !isspace (*args
))
1644 /* If there are more arguments, terminate arg and
1646 if (*args
!= '\000')
1649 /* Now process the argument. */
1652 /* The first argument is the file name. */
1653 filename
= tilde_expand (arg
);
1654 make_cleanup (xfree
, filename
);
1659 /* The second argument is always the text address at which
1660 to load the program. */
1661 sect_opts
[section_index
].name
= ".text";
1662 sect_opts
[section_index
].value
= arg
;
1663 if (++section_index
> num_sect_opts
)
1666 sect_opts
= ((struct sect_opt
*)
1667 xrealloc (sect_opts
,
1669 * sizeof (struct sect_opt
)));
1674 /* It's an option (starting with '-') or it's an argument
1679 if (strcmp (arg
, "-readnow") == 0)
1680 flags
|= OBJF_READNOW
;
1681 else if (strcmp (arg
, "-s") == 0)
1683 expecting_sec_name
= 1;
1684 expecting_sec_addr
= 1;
1689 if (expecting_sec_name
)
1691 sect_opts
[section_index
].name
= arg
;
1692 expecting_sec_name
= 0;
1695 if (expecting_sec_addr
)
1697 sect_opts
[section_index
].value
= arg
;
1698 expecting_sec_addr
= 0;
1699 if (++section_index
> num_sect_opts
)
1702 sect_opts
= ((struct sect_opt
*)
1703 xrealloc (sect_opts
,
1705 * sizeof (struct sect_opt
)));
1709 error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*");
1715 /* Print the prompt for the query below. And save the arguments into
1716 a sect_addr_info structure to be passed around to other
1717 functions. We have to split this up into separate print
1718 statements because local_hex_string returns a local static
1721 printf_unfiltered ("add symbol table from file \"%s\" at\n", filename
);
1722 section_addrs
= alloc_section_addr_info (section_index
);
1723 make_cleanup (xfree
, section_addrs
);
1724 for (i
= 0; i
< section_index
; i
++)
1727 char *val
= sect_opts
[i
].value
;
1728 char *sec
= sect_opts
[i
].name
;
1730 addr
= parse_and_eval_address (val
);
1732 /* Here we store the section offsets in the order they were
1733 entered on the command line. */
1734 section_addrs
->other
[sec_num
].name
= sec
;
1735 section_addrs
->other
[sec_num
].addr
= addr
;
1736 printf_unfiltered ("\t%s_addr = %s\n",
1738 local_hex_string ((unsigned long)addr
));
1741 /* The object's sections are initialized when a
1742 call is made to build_objfile_section_table (objfile).
1743 This happens in reread_symbols.
1744 At this point, we don't know what file type this is,
1745 so we can't determine what section names are valid. */
1748 if (from_tty
&& (!query ("%s", "")))
1749 error ("Not confirmed.");
1751 symbol_file_add (filename
, from_tty
, section_addrs
, 0, flags
);
1753 /* Getting new symbols may change our opinion about what is
1755 reinit_frame_cache ();
1756 do_cleanups (my_cleanups
);
1760 add_shared_symbol_files_command (char *args
, int from_tty
)
1762 #ifdef ADD_SHARED_SYMBOL_FILES
1763 ADD_SHARED_SYMBOL_FILES (args
, from_tty
);
1765 error ("This command is not available in this configuration of GDB.");
1769 /* Re-read symbols if a symbol-file has changed. */
1771 reread_symbols (void)
1773 struct objfile
*objfile
;
1776 struct stat new_statbuf
;
1779 /* With the addition of shared libraries, this should be modified,
1780 the load time should be saved in the partial symbol tables, since
1781 different tables may come from different source files. FIXME.
1782 This routine should then walk down each partial symbol table
1783 and see if the symbol table that it originates from has been changed */
1785 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
1789 #ifdef DEPRECATED_IBM6000_TARGET
1790 /* If this object is from a shared library, then you should
1791 stat on the library name, not member name. */
1793 if (objfile
->obfd
->my_archive
)
1794 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
1797 res
= stat (objfile
->name
, &new_statbuf
);
1800 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1801 printf_unfiltered ("`%s' has disappeared; keeping its symbols.\n",
1805 new_modtime
= new_statbuf
.st_mtime
;
1806 if (new_modtime
!= objfile
->mtime
)
1808 struct cleanup
*old_cleanups
;
1809 struct section_offsets
*offsets
;
1811 char *obfd_filename
;
1813 printf_unfiltered ("`%s' has changed; re-reading symbols.\n",
1816 /* There are various functions like symbol_file_add,
1817 symfile_bfd_open, syms_from_objfile, etc., which might
1818 appear to do what we want. But they have various other
1819 effects which we *don't* want. So we just do stuff
1820 ourselves. We don't worry about mapped files (for one thing,
1821 any mapped file will be out of date). */
1823 /* If we get an error, blow away this objfile (not sure if
1824 that is the correct response for things like shared
1826 old_cleanups
= make_cleanup_free_objfile (objfile
);
1827 /* We need to do this whenever any symbols go away. */
1828 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
1830 /* Clean up any state BFD has sitting around. We don't need
1831 to close the descriptor but BFD lacks a way of closing the
1832 BFD without closing the descriptor. */
1833 obfd_filename
= bfd_get_filename (objfile
->obfd
);
1834 if (!bfd_close (objfile
->obfd
))
1835 error ("Can't close BFD for %s: %s", objfile
->name
,
1836 bfd_errmsg (bfd_get_error ()));
1837 objfile
->obfd
= bfd_openr (obfd_filename
, gnutarget
);
1838 if (objfile
->obfd
== NULL
)
1839 error ("Can't open %s to read symbols.", objfile
->name
);
1840 /* bfd_openr sets cacheable to true, which is what we want. */
1841 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
1842 error ("Can't read symbols from %s: %s.", objfile
->name
,
1843 bfd_errmsg (bfd_get_error ()));
1845 /* Save the offsets, we will nuke them with the rest of the
1847 num_offsets
= objfile
->num_sections
;
1848 offsets
= ((struct section_offsets
*)
1849 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
1850 memcpy (offsets
, objfile
->section_offsets
,
1851 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
1853 /* Nuke all the state that we will re-read. Much of the following
1854 code which sets things to NULL really is necessary to tell
1855 other parts of GDB that there is nothing currently there. */
1857 /* FIXME: Do we have to free a whole linked list, or is this
1859 if (objfile
->global_psymbols
.list
)
1860 xmfree (objfile
->md
, objfile
->global_psymbols
.list
);
1861 memset (&objfile
->global_psymbols
, 0,
1862 sizeof (objfile
->global_psymbols
));
1863 if (objfile
->static_psymbols
.list
)
1864 xmfree (objfile
->md
, objfile
->static_psymbols
.list
);
1865 memset (&objfile
->static_psymbols
, 0,
1866 sizeof (objfile
->static_psymbols
));
1868 /* Free the obstacks for non-reusable objfiles */
1869 bcache_xfree (objfile
->psymbol_cache
);
1870 objfile
->psymbol_cache
= bcache_xmalloc ();
1871 bcache_xfree (objfile
->macro_cache
);
1872 objfile
->macro_cache
= bcache_xmalloc ();
1873 if (objfile
->demangled_names_hash
!= NULL
)
1875 htab_delete (objfile
->demangled_names_hash
);
1876 objfile
->demangled_names_hash
= NULL
;
1878 obstack_free (&objfile
->objfile_obstack
, 0);
1879 objfile
->sections
= NULL
;
1880 objfile
->symtabs
= NULL
;
1881 objfile
->psymtabs
= NULL
;
1882 objfile
->free_psymtabs
= NULL
;
1883 objfile
->cp_namespace_symtab
= NULL
;
1884 objfile
->msymbols
= NULL
;
1885 objfile
->sym_private
= NULL
;
1886 objfile
->minimal_symbol_count
= 0;
1887 memset (&objfile
->msymbol_hash
, 0,
1888 sizeof (objfile
->msymbol_hash
));
1889 memset (&objfile
->msymbol_demangled_hash
, 0,
1890 sizeof (objfile
->msymbol_demangled_hash
));
1891 objfile
->fundamental_types
= NULL
;
1892 clear_objfile_data (objfile
);
1893 if (objfile
->sf
!= NULL
)
1895 (*objfile
->sf
->sym_finish
) (objfile
);
1898 /* We never make this a mapped file. */
1900 objfile
->psymbol_cache
= bcache_xmalloc ();
1901 objfile
->macro_cache
= bcache_xmalloc ();
1902 /* obstack_init also initializes the obstack so it is
1903 empty. We could use obstack_specify_allocation but
1904 gdb_obstack.h specifies the alloc/dealloc
1906 obstack_init (&objfile
->objfile_obstack
);
1907 if (build_objfile_section_table (objfile
))
1909 error ("Can't find the file sections in `%s': %s",
1910 objfile
->name
, bfd_errmsg (bfd_get_error ()));
1912 terminate_minimal_symbol_table (objfile
);
1914 /* We use the same section offsets as from last time. I'm not
1915 sure whether that is always correct for shared libraries. */
1916 objfile
->section_offsets
= (struct section_offsets
*)
1917 obstack_alloc (&objfile
->objfile_obstack
,
1918 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
1919 memcpy (objfile
->section_offsets
, offsets
,
1920 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
1921 objfile
->num_sections
= num_offsets
;
1923 /* What the hell is sym_new_init for, anyway? The concept of
1924 distinguishing between the main file and additional files
1925 in this way seems rather dubious. */
1926 if (objfile
== symfile_objfile
)
1928 (*objfile
->sf
->sym_new_init
) (objfile
);
1930 RESET_HP_UX_GLOBALS ();
1934 (*objfile
->sf
->sym_init
) (objfile
);
1935 clear_complaints (&symfile_complaints
, 1, 1);
1936 /* The "mainline" parameter is a hideous hack; I think leaving it
1937 zero is OK since dbxread.c also does what it needs to do if
1938 objfile->global_psymbols.size is 0. */
1939 (*objfile
->sf
->sym_read
) (objfile
, 0);
1940 if (!have_partial_symbols () && !have_full_symbols ())
1943 printf_unfiltered ("(no debugging symbols found)\n");
1946 objfile
->flags
|= OBJF_SYMS
;
1948 /* We're done reading the symbol file; finish off complaints. */
1949 clear_complaints (&symfile_complaints
, 0, 1);
1951 /* Getting new symbols may change our opinion about what is
1954 reinit_frame_cache ();
1956 /* Discard cleanups as symbol reading was successful. */
1957 discard_cleanups (old_cleanups
);
1959 /* If the mtime has changed between the time we set new_modtime
1960 and now, we *want* this to be out of date, so don't call stat
1962 objfile
->mtime
= new_modtime
;
1964 reread_separate_symbols (objfile
);
1970 clear_symtab_users ();
1974 /* Handle separate debug info for OBJFILE, which has just been
1976 - If we had separate debug info before, but now we don't, get rid
1977 of the separated objfile.
1978 - If we didn't have separated debug info before, but now we do,
1979 read in the new separated debug info file.
1980 - If the debug link points to a different file, toss the old one
1981 and read the new one.
1982 This function does *not* handle the case where objfile is still
1983 using the same separate debug info file, but that file's timestamp
1984 has changed. That case should be handled by the loop in
1985 reread_symbols already. */
1987 reread_separate_symbols (struct objfile
*objfile
)
1990 unsigned long crc32
;
1992 /* Does the updated objfile's debug info live in a
1994 debug_file
= find_separate_debug_file (objfile
);
1996 if (objfile
->separate_debug_objfile
)
1998 /* There are two cases where we need to get rid of
1999 the old separated debug info objfile:
2000 - if the new primary objfile doesn't have
2001 separated debug info, or
2002 - if the new primary objfile has separate debug
2003 info, but it's under a different filename.
2005 If the old and new objfiles both have separate
2006 debug info, under the same filename, then we're
2007 okay --- if the separated file's contents have
2008 changed, we will have caught that when we
2009 visited it in this function's outermost
2012 || strcmp (debug_file
, objfile
->separate_debug_objfile
->name
) != 0)
2013 free_objfile (objfile
->separate_debug_objfile
);
2016 /* If the new objfile has separate debug info, and we
2017 haven't loaded it already, do so now. */
2019 && ! objfile
->separate_debug_objfile
)
2021 /* Use the same section offset table as objfile itself.
2022 Preserve the flags from objfile that make sense. */
2023 objfile
->separate_debug_objfile
2024 = (symbol_file_add_with_addrs_or_offsets
2026 info_verbose
, /* from_tty: Don't override the default. */
2027 0, /* No addr table. */
2028 objfile
->section_offsets
, objfile
->num_sections
,
2029 0, /* Not mainline. See comments about this above. */
2030 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
2031 | OBJF_USERLOADED
)));
2032 objfile
->separate_debug_objfile
->separate_debug_objfile_backlink
2048 static filename_language
*filename_language_table
;
2049 static int fl_table_size
, fl_table_next
;
2052 add_filename_language (char *ext
, enum language lang
)
2054 if (fl_table_next
>= fl_table_size
)
2056 fl_table_size
+= 10;
2057 filename_language_table
=
2058 xrealloc (filename_language_table
,
2059 fl_table_size
* sizeof (*filename_language_table
));
2062 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2063 filename_language_table
[fl_table_next
].lang
= lang
;
2067 static char *ext_args
;
2070 set_ext_lang_command (char *args
, int from_tty
)
2073 char *cp
= ext_args
;
2076 /* First arg is filename extension, starting with '.' */
2078 error ("'%s': Filename extension must begin with '.'", ext_args
);
2080 /* Find end of first arg. */
2081 while (*cp
&& !isspace (*cp
))
2085 error ("'%s': two arguments required -- filename extension and language",
2088 /* Null-terminate first arg */
2091 /* Find beginning of second arg, which should be a source language. */
2092 while (*cp
&& isspace (*cp
))
2096 error ("'%s': two arguments required -- filename extension and language",
2099 /* Lookup the language from among those we know. */
2100 lang
= language_enum (cp
);
2102 /* Now lookup the filename extension: do we already know it? */
2103 for (i
= 0; i
< fl_table_next
; i
++)
2104 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2107 if (i
>= fl_table_next
)
2109 /* new file extension */
2110 add_filename_language (ext_args
, lang
);
2114 /* redefining a previously known filename extension */
2117 /* query ("Really make files of type %s '%s'?", */
2118 /* ext_args, language_str (lang)); */
2120 xfree (filename_language_table
[i
].ext
);
2121 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2122 filename_language_table
[i
].lang
= lang
;
2127 info_ext_lang_command (char *args
, int from_tty
)
2131 printf_filtered ("Filename extensions and the languages they represent:");
2132 printf_filtered ("\n\n");
2133 for (i
= 0; i
< fl_table_next
; i
++)
2134 printf_filtered ("\t%s\t- %s\n",
2135 filename_language_table
[i
].ext
,
2136 language_str (filename_language_table
[i
].lang
));
2140 init_filename_language_table (void)
2142 if (fl_table_size
== 0) /* protect against repetition */
2146 filename_language_table
=
2147 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
2148 add_filename_language (".c", language_c
);
2149 add_filename_language (".C", language_cplus
);
2150 add_filename_language (".cc", language_cplus
);
2151 add_filename_language (".cp", language_cplus
);
2152 add_filename_language (".cpp", language_cplus
);
2153 add_filename_language (".cxx", language_cplus
);
2154 add_filename_language (".c++", language_cplus
);
2155 add_filename_language (".java", language_java
);
2156 add_filename_language (".class", language_java
);
2157 add_filename_language (".m", language_objc
);
2158 add_filename_language (".f", language_fortran
);
2159 add_filename_language (".F", language_fortran
);
2160 add_filename_language (".s", language_asm
);
2161 add_filename_language (".S", language_asm
);
2162 add_filename_language (".pas", language_pascal
);
2163 add_filename_language (".p", language_pascal
);
2164 add_filename_language (".pp", language_pascal
);
2169 deduce_language_from_filename (char *filename
)
2174 if (filename
!= NULL
)
2175 if ((cp
= strrchr (filename
, '.')) != NULL
)
2176 for (i
= 0; i
< fl_table_next
; i
++)
2177 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2178 return filename_language_table
[i
].lang
;
2180 return language_unknown
;
2185 Allocate and partly initialize a new symbol table. Return a pointer
2186 to it. error() if no space.
2188 Caller must set these fields:
2194 possibly free_named_symtabs (symtab->filename);
2198 allocate_symtab (char *filename
, struct objfile
*objfile
)
2200 struct symtab
*symtab
;
2202 symtab
= (struct symtab
*)
2203 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symtab
));
2204 memset (symtab
, 0, sizeof (*symtab
));
2205 symtab
->filename
= obsavestring (filename
, strlen (filename
),
2206 &objfile
->objfile_obstack
);
2207 symtab
->fullname
= NULL
;
2208 symtab
->language
= deduce_language_from_filename (filename
);
2209 symtab
->debugformat
= obsavestring ("unknown", 7,
2210 &objfile
->objfile_obstack
);
2212 /* Hook it to the objfile it comes from */
2214 symtab
->objfile
= objfile
;
2215 symtab
->next
= objfile
->symtabs
;
2216 objfile
->symtabs
= symtab
;
2218 /* FIXME: This should go away. It is only defined for the Z8000,
2219 and the Z8000 definition of this macro doesn't have anything to
2220 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
2221 here for convenience. */
2222 #ifdef INIT_EXTRA_SYMTAB_INFO
2223 INIT_EXTRA_SYMTAB_INFO (symtab
);
2229 struct partial_symtab
*
2230 allocate_psymtab (char *filename
, struct objfile
*objfile
)
2232 struct partial_symtab
*psymtab
;
2234 if (objfile
->free_psymtabs
)
2236 psymtab
= objfile
->free_psymtabs
;
2237 objfile
->free_psymtabs
= psymtab
->next
;
2240 psymtab
= (struct partial_symtab
*)
2241 obstack_alloc (&objfile
->objfile_obstack
,
2242 sizeof (struct partial_symtab
));
2244 memset (psymtab
, 0, sizeof (struct partial_symtab
));
2245 psymtab
->filename
= obsavestring (filename
, strlen (filename
),
2246 &objfile
->objfile_obstack
);
2247 psymtab
->symtab
= NULL
;
2249 /* Prepend it to the psymtab list for the objfile it belongs to.
2250 Psymtabs are searched in most recent inserted -> least recent
2253 psymtab
->objfile
= objfile
;
2254 psymtab
->next
= objfile
->psymtabs
;
2255 objfile
->psymtabs
= psymtab
;
2258 struct partial_symtab
**prev_pst
;
2259 psymtab
->objfile
= objfile
;
2260 psymtab
->next
= NULL
;
2261 prev_pst
= &(objfile
->psymtabs
);
2262 while ((*prev_pst
) != NULL
)
2263 prev_pst
= &((*prev_pst
)->next
);
2264 (*prev_pst
) = psymtab
;
2272 discard_psymtab (struct partial_symtab
*pst
)
2274 struct partial_symtab
**prev_pst
;
2277 Empty psymtabs happen as a result of header files which don't
2278 have any symbols in them. There can be a lot of them. But this
2279 check is wrong, in that a psymtab with N_SLINE entries but
2280 nothing else is not empty, but we don't realize that. Fixing
2281 that without slowing things down might be tricky. */
2283 /* First, snip it out of the psymtab chain */
2285 prev_pst
= &(pst
->objfile
->psymtabs
);
2286 while ((*prev_pst
) != pst
)
2287 prev_pst
= &((*prev_pst
)->next
);
2288 (*prev_pst
) = pst
->next
;
2290 /* Next, put it on a free list for recycling */
2292 pst
->next
= pst
->objfile
->free_psymtabs
;
2293 pst
->objfile
->free_psymtabs
= pst
;
2297 /* Reset all data structures in gdb which may contain references to symbol
2301 clear_symtab_users (void)
2303 /* Someday, we should do better than this, by only blowing away
2304 the things that really need to be blown. */
2305 clear_value_history ();
2307 clear_internalvars ();
2308 breakpoint_re_set ();
2309 set_default_breakpoint (0, 0, 0, 0);
2310 clear_current_source_symtab_and_line ();
2311 clear_pc_function_cache ();
2312 if (target_new_objfile_hook
)
2313 target_new_objfile_hook (NULL
);
2317 clear_symtab_users_cleanup (void *ignore
)
2319 clear_symtab_users ();
2322 /* clear_symtab_users_once:
2324 This function is run after symbol reading, or from a cleanup.
2325 If an old symbol table was obsoleted, the old symbol table
2326 has been blown away, but the other GDB data structures that may
2327 reference it have not yet been cleared or re-directed. (The old
2328 symtab was zapped, and the cleanup queued, in free_named_symtab()
2331 This function can be queued N times as a cleanup, or called
2332 directly; it will do all the work the first time, and then will be a
2333 no-op until the next time it is queued. This works by bumping a
2334 counter at queueing time. Much later when the cleanup is run, or at
2335 the end of symbol processing (in case the cleanup is discarded), if
2336 the queued count is greater than the "done-count", we do the work
2337 and set the done-count to the queued count. If the queued count is
2338 less than or equal to the done-count, we just ignore the call. This
2339 is needed because reading a single .o file will often replace many
2340 symtabs (one per .h file, for example), and we don't want to reset
2341 the breakpoints N times in the user's face.
2343 The reason we both queue a cleanup, and call it directly after symbol
2344 reading, is because the cleanup protects us in case of errors, but is
2345 discarded if symbol reading is successful. */
2348 /* FIXME: As free_named_symtabs is currently a big noop this function
2349 is no longer needed. */
2350 static void clear_symtab_users_once (void);
2352 static int clear_symtab_users_queued
;
2353 static int clear_symtab_users_done
;
2356 clear_symtab_users_once (void)
2358 /* Enforce once-per-`do_cleanups'-semantics */
2359 if (clear_symtab_users_queued
<= clear_symtab_users_done
)
2361 clear_symtab_users_done
= clear_symtab_users_queued
;
2363 clear_symtab_users ();
2367 /* Delete the specified psymtab, and any others that reference it. */
2370 cashier_psymtab (struct partial_symtab
*pst
)
2372 struct partial_symtab
*ps
, *pprev
= NULL
;
2375 /* Find its previous psymtab in the chain */
2376 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2385 /* Unhook it from the chain. */
2386 if (ps
== pst
->objfile
->psymtabs
)
2387 pst
->objfile
->psymtabs
= ps
->next
;
2389 pprev
->next
= ps
->next
;
2391 /* FIXME, we can't conveniently deallocate the entries in the
2392 partial_symbol lists (global_psymbols/static_psymbols) that
2393 this psymtab points to. These just take up space until all
2394 the psymtabs are reclaimed. Ditto the dependencies list and
2395 filename, which are all in the objfile_obstack. */
2397 /* We need to cashier any psymtab that has this one as a dependency... */
2399 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2401 for (i
= 0; i
< ps
->number_of_dependencies
; i
++)
2403 if (ps
->dependencies
[i
] == pst
)
2405 cashier_psymtab (ps
);
2406 goto again
; /* Must restart, chain has been munged. */
2413 /* If a symtab or psymtab for filename NAME is found, free it along
2414 with any dependent breakpoints, displays, etc.
2415 Used when loading new versions of object modules with the "add-file"
2416 command. This is only called on the top-level symtab or psymtab's name;
2417 it is not called for subsidiary files such as .h files.
2419 Return value is 1 if we blew away the environment, 0 if not.
2420 FIXME. The return value appears to never be used.
2422 FIXME. I think this is not the best way to do this. We should
2423 work on being gentler to the environment while still cleaning up
2424 all stray pointers into the freed symtab. */
2427 free_named_symtabs (char *name
)
2430 /* FIXME: With the new method of each objfile having it's own
2431 psymtab list, this function needs serious rethinking. In particular,
2432 why was it ever necessary to toss psymtabs with specific compilation
2433 unit filenames, as opposed to all psymtabs from a particular symbol
2435 Well, the answer is that some systems permit reloading of particular
2436 compilation units. We want to blow away any old info about these
2437 compilation units, regardless of which objfiles they arrived in. --gnu. */
2440 struct symtab
*prev
;
2441 struct partial_symtab
*ps
;
2442 struct blockvector
*bv
;
2445 /* We only wack things if the symbol-reload switch is set. */
2446 if (!symbol_reloading
)
2449 /* Some symbol formats have trouble providing file names... */
2450 if (name
== 0 || *name
== '\0')
2453 /* Look for a psymtab with the specified name. */
2456 for (ps
= partial_symtab_list
; ps
; ps
= ps
->next
)
2458 if (strcmp (name
, ps
->filename
) == 0)
2460 cashier_psymtab (ps
); /* Blow it away...and its little dog, too. */
2461 goto again2
; /* Must restart, chain has been munged */
2465 /* Look for a symtab with the specified name. */
2467 for (s
= symtab_list
; s
; s
= s
->next
)
2469 if (strcmp (name
, s
->filename
) == 0)
2476 if (s
== symtab_list
)
2477 symtab_list
= s
->next
;
2479 prev
->next
= s
->next
;
2481 /* For now, queue a delete for all breakpoints, displays, etc., whether
2482 or not they depend on the symtab being freed. This should be
2483 changed so that only those data structures affected are deleted. */
2485 /* But don't delete anything if the symtab is empty.
2486 This test is necessary due to a bug in "dbxread.c" that
2487 causes empty symtabs to be created for N_SO symbols that
2488 contain the pathname of the object file. (This problem
2489 has been fixed in GDB 3.9x). */
2491 bv
= BLOCKVECTOR (s
);
2492 if (BLOCKVECTOR_NBLOCKS (bv
) > 2
2493 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
))
2494 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)))
2496 complaint (&symfile_complaints
, "Replacing old symbols for `%s'",
2498 clear_symtab_users_queued
++;
2499 make_cleanup (clear_symtab_users_once
, 0);
2504 complaint (&symfile_complaints
, "Empty symbol table found for `%s'",
2512 /* It is still possible that some breakpoints will be affected
2513 even though no symtab was found, since the file might have
2514 been compiled without debugging, and hence not be associated
2515 with a symtab. In order to handle this correctly, we would need
2516 to keep a list of text address ranges for undebuggable files.
2517 For now, we do nothing, since this is a fairly obscure case. */
2521 /* FIXME, what about the minimal symbol table? */
2528 /* Allocate and partially fill a partial symtab. It will be
2529 completely filled at the end of the symbol list.
2531 FILENAME is the name of the symbol-file we are reading from. */
2533 struct partial_symtab
*
2534 start_psymtab_common (struct objfile
*objfile
,
2535 struct section_offsets
*section_offsets
, char *filename
,
2536 CORE_ADDR textlow
, struct partial_symbol
**global_syms
,
2537 struct partial_symbol
**static_syms
)
2539 struct partial_symtab
*psymtab
;
2541 psymtab
= allocate_psymtab (filename
, objfile
);
2542 psymtab
->section_offsets
= section_offsets
;
2543 psymtab
->textlow
= textlow
;
2544 psymtab
->texthigh
= psymtab
->textlow
; /* default */
2545 psymtab
->globals_offset
= global_syms
- objfile
->global_psymbols
.list
;
2546 psymtab
->statics_offset
= static_syms
- objfile
->static_psymbols
.list
;
2550 /* Add a symbol with a long value to a psymtab.
2551 Since one arg is a struct, we pass in a ptr and deref it (sigh).
2552 Return the partial symbol that has been added. */
2554 /* NOTE: carlton/2003-09-11: The reason why we return the partial
2555 symbol is so that callers can get access to the symbol's demangled
2556 name, which they don't have any cheap way to determine otherwise.
2557 (Currenly, dwarf2read.c is the only file who uses that information,
2558 though it's possible that other readers might in the future.)
2559 Elena wasn't thrilled about that, and I don't blame her, but we
2560 couldn't come up with a better way to get that information. If
2561 it's needed in other situations, we could consider breaking up
2562 SYMBOL_SET_NAMES to provide access to the demangled name lookup
2565 const struct partial_symbol
*
2566 add_psymbol_to_list (char *name
, int namelength
, domain_enum domain
,
2567 enum address_class
class,
2568 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2569 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2570 enum language language
, struct objfile
*objfile
)
2572 struct partial_symbol
*psym
;
2573 char *buf
= alloca (namelength
+ 1);
2574 /* psymbol is static so that there will be no uninitialized gaps in the
2575 structure which might contain random data, causing cache misses in
2577 static struct partial_symbol psymbol
;
2579 /* Create local copy of the partial symbol */
2580 memcpy (buf
, name
, namelength
);
2581 buf
[namelength
] = '\0';
2582 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2585 SYMBOL_VALUE (&psymbol
) = val
;
2589 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2591 SYMBOL_SECTION (&psymbol
) = 0;
2592 SYMBOL_LANGUAGE (&psymbol
) = language
;
2593 PSYMBOL_DOMAIN (&psymbol
) = domain
;
2594 PSYMBOL_CLASS (&psymbol
) = class;
2596 SYMBOL_SET_NAMES (&psymbol
, buf
, namelength
, objfile
);
2598 /* Stash the partial symbol away in the cache */
2599 psym
= deprecated_bcache (&psymbol
, sizeof (struct partial_symbol
),
2600 objfile
->psymbol_cache
);
2602 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2603 if (list
->next
>= list
->list
+ list
->size
)
2605 extend_psymbol_list (list
, objfile
);
2607 *list
->next
++ = psym
;
2608 OBJSTAT (objfile
, n_psyms
++);
2613 /* Add a symbol with a long value to a psymtab. This differs from
2614 * add_psymbol_to_list above in taking both a mangled and a demangled
2618 add_psymbol_with_dem_name_to_list (char *name
, int namelength
, char *dem_name
,
2619 int dem_namelength
, domain_enum domain
,
2620 enum address_class
class,
2621 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2622 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2623 enum language language
,
2624 struct objfile
*objfile
)
2626 struct partial_symbol
*psym
;
2627 char *buf
= alloca (namelength
+ 1);
2628 /* psymbol is static so that there will be no uninitialized gaps in the
2629 structure which might contain random data, causing cache misses in
2631 static struct partial_symbol psymbol
;
2633 /* Create local copy of the partial symbol */
2635 memcpy (buf
, name
, namelength
);
2636 buf
[namelength
] = '\0';
2637 DEPRECATED_SYMBOL_NAME (&psymbol
) = deprecated_bcache (buf
, namelength
+ 1,
2638 objfile
->psymbol_cache
);
2640 buf
= alloca (dem_namelength
+ 1);
2641 memcpy (buf
, dem_name
, dem_namelength
);
2642 buf
[dem_namelength
] = '\0';
2647 case language_cplus
:
2648 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol
) =
2649 deprecated_bcache (buf
, dem_namelength
+ 1, objfile
->psymbol_cache
);
2651 /* FIXME What should be done for the default case? Ignoring for now. */
2654 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2657 SYMBOL_VALUE (&psymbol
) = val
;
2661 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2663 SYMBOL_SECTION (&psymbol
) = 0;
2664 SYMBOL_LANGUAGE (&psymbol
) = language
;
2665 PSYMBOL_DOMAIN (&psymbol
) = domain
;
2666 PSYMBOL_CLASS (&psymbol
) = class;
2667 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2669 /* Stash the partial symbol away in the cache */
2670 psym
= deprecated_bcache (&psymbol
, sizeof (struct partial_symbol
),
2671 objfile
->psymbol_cache
);
2673 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2674 if (list
->next
>= list
->list
+ list
->size
)
2676 extend_psymbol_list (list
, objfile
);
2678 *list
->next
++ = psym
;
2679 OBJSTAT (objfile
, n_psyms
++);
2682 /* Initialize storage for partial symbols. */
2685 init_psymbol_list (struct objfile
*objfile
, int total_symbols
)
2687 /* Free any previously allocated psymbol lists. */
2689 if (objfile
->global_psymbols
.list
)
2691 xmfree (objfile
->md
, objfile
->global_psymbols
.list
);
2693 if (objfile
->static_psymbols
.list
)
2695 xmfree (objfile
->md
, objfile
->static_psymbols
.list
);
2698 /* Current best guess is that approximately a twentieth
2699 of the total symbols (in a debugging file) are global or static
2702 objfile
->global_psymbols
.size
= total_symbols
/ 10;
2703 objfile
->static_psymbols
.size
= total_symbols
/ 10;
2705 if (objfile
->global_psymbols
.size
> 0)
2707 objfile
->global_psymbols
.next
=
2708 objfile
->global_psymbols
.list
= (struct partial_symbol
**)
2709 xmmalloc (objfile
->md
, (objfile
->global_psymbols
.size
2710 * sizeof (struct partial_symbol
*)));
2712 if (objfile
->static_psymbols
.size
> 0)
2714 objfile
->static_psymbols
.next
=
2715 objfile
->static_psymbols
.list
= (struct partial_symbol
**)
2716 xmmalloc (objfile
->md
, (objfile
->static_psymbols
.size
2717 * sizeof (struct partial_symbol
*)));
2722 The following code implements an abstraction for debugging overlay sections.
2724 The target model is as follows:
2725 1) The gnu linker will permit multiple sections to be mapped into the
2726 same VMA, each with its own unique LMA (or load address).
2727 2) It is assumed that some runtime mechanism exists for mapping the
2728 sections, one by one, from the load address into the VMA address.
2729 3) This code provides a mechanism for gdb to keep track of which
2730 sections should be considered to be mapped from the VMA to the LMA.
2731 This information is used for symbol lookup, and memory read/write.
2732 For instance, if a section has been mapped then its contents
2733 should be read from the VMA, otherwise from the LMA.
2735 Two levels of debugger support for overlays are available. One is
2736 "manual", in which the debugger relies on the user to tell it which
2737 overlays are currently mapped. This level of support is
2738 implemented entirely in the core debugger, and the information about
2739 whether a section is mapped is kept in the objfile->obj_section table.
2741 The second level of support is "automatic", and is only available if
2742 the target-specific code provides functionality to read the target's
2743 overlay mapping table, and translate its contents for the debugger
2744 (by updating the mapped state information in the obj_section tables).
2746 The interface is as follows:
2748 overlay map <name> -- tell gdb to consider this section mapped
2749 overlay unmap <name> -- tell gdb to consider this section unmapped
2750 overlay list -- list the sections that GDB thinks are mapped
2751 overlay read-target -- get the target's state of what's mapped
2752 overlay off/manual/auto -- set overlay debugging state
2753 Functional interface:
2754 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2755 section, return that section.
2756 find_pc_overlay(pc): find any overlay section that contains
2757 the pc, either in its VMA or its LMA
2758 overlay_is_mapped(sect): true if overlay is marked as mapped
2759 section_is_overlay(sect): true if section's VMA != LMA
2760 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2761 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2762 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2763 overlay_mapped_address(...): map an address from section's LMA to VMA
2764 overlay_unmapped_address(...): map an address from section's VMA to LMA
2765 symbol_overlayed_address(...): Return a "current" address for symbol:
2766 either in VMA or LMA depending on whether
2767 the symbol's section is currently mapped
2770 /* Overlay debugging state: */
2772 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2773 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
2775 /* Target vector for refreshing overlay mapped state */
2776 static void simple_overlay_update (struct obj_section
*);
2777 void (*target_overlay_update
) (struct obj_section
*) = simple_overlay_update
;
2779 /* Function: section_is_overlay (SECTION)
2780 Returns true if SECTION has VMA not equal to LMA, ie.
2781 SECTION is loaded at an address different from where it will "run". */
2784 section_is_overlay (asection
*section
)
2786 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2788 if (overlay_debugging
)
2789 if (section
&& section
->lma
!= 0 &&
2790 section
->vma
!= section
->lma
)
2796 /* Function: overlay_invalidate_all (void)
2797 Invalidate the mapped state of all overlay sections (mark it as stale). */
2800 overlay_invalidate_all (void)
2802 struct objfile
*objfile
;
2803 struct obj_section
*sect
;
2805 ALL_OBJSECTIONS (objfile
, sect
)
2806 if (section_is_overlay (sect
->the_bfd_section
))
2807 sect
->ovly_mapped
= -1;
2810 /* Function: overlay_is_mapped (SECTION)
2811 Returns true if section is an overlay, and is currently mapped.
2812 Private: public access is thru function section_is_mapped.
2814 Access to the ovly_mapped flag is restricted to this function, so
2815 that we can do automatic update. If the global flag
2816 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2817 overlay_invalidate_all. If the mapped state of the particular
2818 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2821 overlay_is_mapped (struct obj_section
*osect
)
2823 if (osect
== 0 || !section_is_overlay (osect
->the_bfd_section
))
2826 switch (overlay_debugging
)
2830 return 0; /* overlay debugging off */
2831 case ovly_auto
: /* overlay debugging automatic */
2832 /* Unles there is a target_overlay_update function,
2833 there's really nothing useful to do here (can't really go auto) */
2834 if (target_overlay_update
)
2836 if (overlay_cache_invalid
)
2838 overlay_invalidate_all ();
2839 overlay_cache_invalid
= 0;
2841 if (osect
->ovly_mapped
== -1)
2842 (*target_overlay_update
) (osect
);
2844 /* fall thru to manual case */
2845 case ovly_on
: /* overlay debugging manual */
2846 return osect
->ovly_mapped
== 1;
2850 /* Function: section_is_mapped
2851 Returns true if section is an overlay, and is currently mapped. */
2854 section_is_mapped (asection
*section
)
2856 struct objfile
*objfile
;
2857 struct obj_section
*osect
;
2859 if (overlay_debugging
)
2860 if (section
&& section_is_overlay (section
))
2861 ALL_OBJSECTIONS (objfile
, osect
)
2862 if (osect
->the_bfd_section
== section
)
2863 return overlay_is_mapped (osect
);
2868 /* Function: pc_in_unmapped_range
2869 If PC falls into the lma range of SECTION, return true, else false. */
2872 pc_in_unmapped_range (CORE_ADDR pc
, asection
*section
)
2874 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2878 if (overlay_debugging
)
2879 if (section
&& section_is_overlay (section
))
2881 size
= bfd_get_section_size_before_reloc (section
);
2882 if (section
->lma
<= pc
&& pc
< section
->lma
+ size
)
2888 /* Function: pc_in_mapped_range
2889 If PC falls into the vma range of SECTION, return true, else false. */
2892 pc_in_mapped_range (CORE_ADDR pc
, asection
*section
)
2894 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2898 if (overlay_debugging
)
2899 if (section
&& section_is_overlay (section
))
2901 size
= bfd_get_section_size_before_reloc (section
);
2902 if (section
->vma
<= pc
&& pc
< section
->vma
+ size
)
2909 /* Return true if the mapped ranges of sections A and B overlap, false
2912 sections_overlap (asection
*a
, asection
*b
)
2914 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2916 CORE_ADDR a_start
= a
->vma
;
2917 CORE_ADDR a_end
= a
->vma
+ bfd_get_section_size_before_reloc (a
);
2918 CORE_ADDR b_start
= b
->vma
;
2919 CORE_ADDR b_end
= b
->vma
+ bfd_get_section_size_before_reloc (b
);
2921 return (a_start
< b_end
&& b_start
< a_end
);
2924 /* Function: overlay_unmapped_address (PC, SECTION)
2925 Returns the address corresponding to PC in the unmapped (load) range.
2926 May be the same as PC. */
2929 overlay_unmapped_address (CORE_ADDR pc
, asection
*section
)
2931 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2933 if (overlay_debugging
)
2934 if (section
&& section_is_overlay (section
) &&
2935 pc_in_mapped_range (pc
, section
))
2936 return pc
+ section
->lma
- section
->vma
;
2941 /* Function: overlay_mapped_address (PC, SECTION)
2942 Returns the address corresponding to PC in the mapped (runtime) range.
2943 May be the same as PC. */
2946 overlay_mapped_address (CORE_ADDR pc
, asection
*section
)
2948 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2950 if (overlay_debugging
)
2951 if (section
&& section_is_overlay (section
) &&
2952 pc_in_unmapped_range (pc
, section
))
2953 return pc
+ section
->vma
- section
->lma
;
2959 /* Function: symbol_overlayed_address
2960 Return one of two addresses (relative to the VMA or to the LMA),
2961 depending on whether the section is mapped or not. */
2964 symbol_overlayed_address (CORE_ADDR address
, asection
*section
)
2966 if (overlay_debugging
)
2968 /* If the symbol has no section, just return its regular address. */
2971 /* If the symbol's section is not an overlay, just return its address */
2972 if (!section_is_overlay (section
))
2974 /* If the symbol's section is mapped, just return its address */
2975 if (section_is_mapped (section
))
2978 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
2979 * then return its LOADED address rather than its vma address!!
2981 return overlay_unmapped_address (address
, section
);
2986 /* Function: find_pc_overlay (PC)
2987 Return the best-match overlay section for PC:
2988 If PC matches a mapped overlay section's VMA, return that section.
2989 Else if PC matches an unmapped section's VMA, return that section.
2990 Else if PC matches an unmapped section's LMA, return that section. */
2993 find_pc_overlay (CORE_ADDR pc
)
2995 struct objfile
*objfile
;
2996 struct obj_section
*osect
, *best_match
= NULL
;
2998 if (overlay_debugging
)
2999 ALL_OBJSECTIONS (objfile
, osect
)
3000 if (section_is_overlay (osect
->the_bfd_section
))
3002 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
))
3004 if (overlay_is_mapped (osect
))
3005 return osect
->the_bfd_section
;
3009 else if (pc_in_unmapped_range (pc
, osect
->the_bfd_section
))
3012 return best_match
? best_match
->the_bfd_section
: NULL
;
3015 /* Function: find_pc_mapped_section (PC)
3016 If PC falls into the VMA address range of an overlay section that is
3017 currently marked as MAPPED, return that section. Else return NULL. */
3020 find_pc_mapped_section (CORE_ADDR pc
)
3022 struct objfile
*objfile
;
3023 struct obj_section
*osect
;
3025 if (overlay_debugging
)
3026 ALL_OBJSECTIONS (objfile
, osect
)
3027 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
) &&
3028 overlay_is_mapped (osect
))
3029 return osect
->the_bfd_section
;
3034 /* Function: list_overlays_command
3035 Print a list of mapped sections and their PC ranges */
3038 list_overlays_command (char *args
, int from_tty
)
3041 struct objfile
*objfile
;
3042 struct obj_section
*osect
;
3044 if (overlay_debugging
)
3045 ALL_OBJSECTIONS (objfile
, osect
)
3046 if (overlay_is_mapped (osect
))
3052 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3053 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3054 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3055 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3057 printf_filtered ("Section %s, loaded at ", name
);
3058 print_address_numeric (lma
, 1, gdb_stdout
);
3059 puts_filtered (" - ");
3060 print_address_numeric (lma
+ size
, 1, gdb_stdout
);
3061 printf_filtered (", mapped at ");
3062 print_address_numeric (vma
, 1, gdb_stdout
);
3063 puts_filtered (" - ");
3064 print_address_numeric (vma
+ size
, 1, gdb_stdout
);
3065 puts_filtered ("\n");
3070 printf_filtered ("No sections are mapped.\n");
3073 /* Function: map_overlay_command
3074 Mark the named section as mapped (ie. residing at its VMA address). */
3077 map_overlay_command (char *args
, int from_tty
)
3079 struct objfile
*objfile
, *objfile2
;
3080 struct obj_section
*sec
, *sec2
;
3083 if (!overlay_debugging
)
3085 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3086 the 'overlay manual' command.");
3088 if (args
== 0 || *args
== 0)
3089 error ("Argument required: name of an overlay section");
3091 /* First, find a section matching the user supplied argument */
3092 ALL_OBJSECTIONS (objfile
, sec
)
3093 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3095 /* Now, check to see if the section is an overlay. */
3096 bfdsec
= sec
->the_bfd_section
;
3097 if (!section_is_overlay (bfdsec
))
3098 continue; /* not an overlay section */
3100 /* Mark the overlay as "mapped" */
3101 sec
->ovly_mapped
= 1;
3103 /* Next, make a pass and unmap any sections that are
3104 overlapped by this new section: */
3105 ALL_OBJSECTIONS (objfile2
, sec2
)
3106 if (sec2
->ovly_mapped
3108 && sec
->the_bfd_section
!= sec2
->the_bfd_section
3109 && sections_overlap (sec
->the_bfd_section
,
3110 sec2
->the_bfd_section
))
3113 printf_unfiltered ("Note: section %s unmapped by overlap\n",
3114 bfd_section_name (objfile
->obfd
,
3115 sec2
->the_bfd_section
));
3116 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
3120 error ("No overlay section called %s", args
);
3123 /* Function: unmap_overlay_command
3124 Mark the overlay section as unmapped
3125 (ie. resident in its LMA address range, rather than the VMA range). */
3128 unmap_overlay_command (char *args
, int from_tty
)
3130 struct objfile
*objfile
;
3131 struct obj_section
*sec
;
3133 if (!overlay_debugging
)
3135 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3136 the 'overlay manual' command.");
3138 if (args
== 0 || *args
== 0)
3139 error ("Argument required: name of an overlay section");
3141 /* First, find a section matching the user supplied argument */
3142 ALL_OBJSECTIONS (objfile
, sec
)
3143 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3145 if (!sec
->ovly_mapped
)
3146 error ("Section %s is not mapped", args
);
3147 sec
->ovly_mapped
= 0;
3150 error ("No overlay section called %s", args
);
3153 /* Function: overlay_auto_command
3154 A utility command to turn on overlay debugging.
3155 Possibly this should be done via a set/show command. */
3158 overlay_auto_command (char *args
, int from_tty
)
3160 overlay_debugging
= ovly_auto
;
3161 enable_overlay_breakpoints ();
3163 printf_unfiltered ("Automatic overlay debugging enabled.");
3166 /* Function: overlay_manual_command
3167 A utility command to turn on overlay debugging.
3168 Possibly this should be done via a set/show command. */
3171 overlay_manual_command (char *args
, int from_tty
)
3173 overlay_debugging
= ovly_on
;
3174 disable_overlay_breakpoints ();
3176 printf_unfiltered ("Overlay debugging enabled.");
3179 /* Function: overlay_off_command
3180 A utility command to turn on overlay debugging.
3181 Possibly this should be done via a set/show command. */
3184 overlay_off_command (char *args
, int from_tty
)
3186 overlay_debugging
= ovly_off
;
3187 disable_overlay_breakpoints ();
3189 printf_unfiltered ("Overlay debugging disabled.");
3193 overlay_load_command (char *args
, int from_tty
)
3195 if (target_overlay_update
)
3196 (*target_overlay_update
) (NULL
);
3198 error ("This target does not know how to read its overlay state.");
3201 /* Function: overlay_command
3202 A place-holder for a mis-typed command */
3204 /* Command list chain containing all defined "overlay" subcommands. */
3205 struct cmd_list_element
*overlaylist
;
3208 overlay_command (char *args
, int from_tty
)
3211 ("\"overlay\" must be followed by the name of an overlay command.\n");
3212 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3216 /* Target Overlays for the "Simplest" overlay manager:
3218 This is GDB's default target overlay layer. It works with the
3219 minimal overlay manager supplied as an example by Cygnus. The
3220 entry point is via a function pointer "target_overlay_update",
3221 so targets that use a different runtime overlay manager can
3222 substitute their own overlay_update function and take over the
3225 The overlay_update function pokes around in the target's data structures
3226 to see what overlays are mapped, and updates GDB's overlay mapping with
3229 In this simple implementation, the target data structures are as follows:
3230 unsigned _novlys; /# number of overlay sections #/
3231 unsigned _ovly_table[_novlys][4] = {
3232 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3233 {..., ..., ..., ...},
3235 unsigned _novly_regions; /# number of overlay regions #/
3236 unsigned _ovly_region_table[_novly_regions][3] = {
3237 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3240 These functions will attempt to update GDB's mappedness state in the
3241 symbol section table, based on the target's mappedness state.
3243 To do this, we keep a cached copy of the target's _ovly_table, and
3244 attempt to detect when the cached copy is invalidated. The main
3245 entry point is "simple_overlay_update(SECT), which looks up SECT in
3246 the cached table and re-reads only the entry for that section from
3247 the target (whenever possible).
3250 /* Cached, dynamically allocated copies of the target data structures: */
3251 static unsigned (*cache_ovly_table
)[4] = 0;
3253 static unsigned (*cache_ovly_region_table
)[3] = 0;
3255 static unsigned cache_novlys
= 0;
3257 static unsigned cache_novly_regions
= 0;
3259 static CORE_ADDR cache_ovly_table_base
= 0;
3261 static CORE_ADDR cache_ovly_region_table_base
= 0;
3265 VMA
, SIZE
, LMA
, MAPPED
3267 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
3269 /* Throw away the cached copy of _ovly_table */
3271 simple_free_overlay_table (void)
3273 if (cache_ovly_table
)
3274 xfree (cache_ovly_table
);
3276 cache_ovly_table
= NULL
;
3277 cache_ovly_table_base
= 0;
3281 /* Throw away the cached copy of _ovly_region_table */
3283 simple_free_overlay_region_table (void)
3285 if (cache_ovly_region_table
)
3286 xfree (cache_ovly_region_table
);
3287 cache_novly_regions
= 0;
3288 cache_ovly_region_table
= NULL
;
3289 cache_ovly_region_table_base
= 0;
3293 /* Read an array of ints from the target into a local buffer.
3294 Convert to host order. int LEN is number of ints */
3296 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
, int len
)
3298 /* FIXME (alloca): Not safe if array is very large. */
3299 char *buf
= alloca (len
* TARGET_LONG_BYTES
);
3302 read_memory (memaddr
, buf
, len
* TARGET_LONG_BYTES
);
3303 for (i
= 0; i
< len
; i
++)
3304 myaddr
[i
] = extract_unsigned_integer (TARGET_LONG_BYTES
* i
+ buf
,
3308 /* Find and grab a copy of the target _ovly_table
3309 (and _novlys, which is needed for the table's size) */
3311 simple_read_overlay_table (void)
3313 struct minimal_symbol
*novlys_msym
, *ovly_table_msym
;
3315 simple_free_overlay_table ();
3316 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3319 error ("Error reading inferior's overlay table: "
3320 "couldn't find `_novlys' variable\n"
3321 "in inferior. Use `overlay manual' mode.");
3325 ovly_table_msym
= lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3326 if (! ovly_table_msym
)
3328 error ("Error reading inferior's overlay table: couldn't find "
3329 "`_ovly_table' array\n"
3330 "in inferior. Use `overlay manual' mode.");
3334 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
), 4);
3336 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3337 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3338 read_target_long_array (cache_ovly_table_base
,
3339 (int *) cache_ovly_table
,
3342 return 1; /* SUCCESS */
3346 /* Find and grab a copy of the target _ovly_region_table
3347 (and _novly_regions, which is needed for the table's size) */
3349 simple_read_overlay_region_table (void)
3351 struct minimal_symbol
*msym
;
3353 simple_free_overlay_region_table ();
3354 msym
= lookup_minimal_symbol ("_novly_regions", NULL
, NULL
);
3356 cache_novly_regions
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
3358 return 0; /* failure */
3359 cache_ovly_region_table
= (void *) xmalloc (cache_novly_regions
* 12);
3360 if (cache_ovly_region_table
!= NULL
)
3362 msym
= lookup_minimal_symbol ("_ovly_region_table", NULL
, NULL
);
3365 cache_ovly_region_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3366 read_target_long_array (cache_ovly_region_table_base
,
3367 (int *) cache_ovly_region_table
,
3368 cache_novly_regions
* 3);
3371 return 0; /* failure */
3374 return 0; /* failure */
3375 return 1; /* SUCCESS */
3379 /* Function: simple_overlay_update_1
3380 A helper function for simple_overlay_update. Assuming a cached copy
3381 of _ovly_table exists, look through it to find an entry whose vma,
3382 lma and size match those of OSECT. Re-read the entry and make sure
3383 it still matches OSECT (else the table may no longer be valid).
3384 Set OSECT's mapped state to match the entry. Return: 1 for
3385 success, 0 for failure. */
3388 simple_overlay_update_1 (struct obj_section
*osect
)
3391 bfd
*obfd
= osect
->objfile
->obfd
;
3392 asection
*bsect
= osect
->the_bfd_section
;
3394 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3395 for (i
= 0; i
< cache_novlys
; i
++)
3396 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3397 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3398 /* && cache_ovly_table[i][SIZE] == size */ )
3400 read_target_long_array (cache_ovly_table_base
+ i
* TARGET_LONG_BYTES
,
3401 (int *) cache_ovly_table
[i
], 4);
3402 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3403 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3404 /* && cache_ovly_table[i][SIZE] == size */ )
3406 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3409 else /* Warning! Warning! Target's ovly table has changed! */
3415 /* Function: simple_overlay_update
3416 If OSECT is NULL, then update all sections' mapped state
3417 (after re-reading the entire target _ovly_table).
3418 If OSECT is non-NULL, then try to find a matching entry in the
3419 cached ovly_table and update only OSECT's mapped state.
3420 If a cached entry can't be found or the cache isn't valid, then
3421 re-read the entire cache, and go ahead and update all sections. */
3424 simple_overlay_update (struct obj_section
*osect
)
3426 struct objfile
*objfile
;
3428 /* Were we given an osect to look up? NULL means do all of them. */
3430 /* Have we got a cached copy of the target's overlay table? */
3431 if (cache_ovly_table
!= NULL
)
3432 /* Does its cached location match what's currently in the symtab? */
3433 if (cache_ovly_table_base
==
3434 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL
, NULL
)))
3435 /* Then go ahead and try to look up this single section in the cache */
3436 if (simple_overlay_update_1 (osect
))
3437 /* Found it! We're done. */
3440 /* Cached table no good: need to read the entire table anew.
3441 Or else we want all the sections, in which case it's actually
3442 more efficient to read the whole table in one block anyway. */
3444 if (! simple_read_overlay_table ())
3447 /* Now may as well update all sections, even if only one was requested. */
3448 ALL_OBJSECTIONS (objfile
, osect
)
3449 if (section_is_overlay (osect
->the_bfd_section
))
3452 bfd
*obfd
= osect
->objfile
->obfd
;
3453 asection
*bsect
= osect
->the_bfd_section
;
3455 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3456 for (i
= 0; i
< cache_novlys
; i
++)
3457 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3458 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3459 /* && cache_ovly_table[i][SIZE] == size */ )
3460 { /* obj_section matches i'th entry in ovly_table */
3461 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3462 break; /* finished with inner for loop: break out */
3467 /* Set the output sections and output offsets for section SECTP in
3468 ABFD. The relocation code in BFD will read these offsets, so we
3469 need to be sure they're initialized. We map each section to itself,
3470 with no offset; this means that SECTP->vma will be honored. */
3473 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3475 sectp
->output_section
= sectp
;
3476 sectp
->output_offset
= 0;
3479 /* Relocate the contents of a debug section SECTP in ABFD. The
3480 contents are stored in BUF if it is non-NULL, or returned in a
3481 malloc'd buffer otherwise.
3483 For some platforms and debug info formats, shared libraries contain
3484 relocations against the debug sections (particularly for DWARF-2;
3485 one affected platform is PowerPC GNU/Linux, although it depends on
3486 the version of the linker in use). Also, ELF object files naturally
3487 have unresolved relocations for their debug sections. We need to apply
3488 the relocations in order to get the locations of symbols correct. */
3491 symfile_relocate_debug_section (bfd
*abfd
, asection
*sectp
, bfd_byte
*buf
)
3493 /* We're only interested in debugging sections with relocation
3495 if ((sectp
->flags
& SEC_RELOC
) == 0)
3497 if ((sectp
->flags
& SEC_DEBUGGING
) == 0)
3500 /* We will handle section offsets properly elsewhere, so relocate as if
3501 all sections begin at 0. */
3502 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3504 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3508 _initialize_symfile (void)
3510 struct cmd_list_element
*c
;
3512 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
,
3513 "Load symbol table from executable file FILE.\n\
3514 The `file' command can also load symbol tables, as well as setting the file\n\
3515 to execute.", &cmdlist
);
3516 set_cmd_completer (c
, filename_completer
);
3518 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
,
3519 "Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3520 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3521 ADDR is the starting address of the file's text.\n\
3522 The optional arguments are section-name section-address pairs and\n\
3523 should be specified if the data and bss segments are not contiguous\n\
3524 with the text. SECT is a section name to be loaded at SECT_ADDR.",
3526 set_cmd_completer (c
, filename_completer
);
3528 c
= add_cmd ("add-shared-symbol-files", class_files
,
3529 add_shared_symbol_files_command
,
3530 "Load the symbols from shared objects in the dynamic linker's link map.",
3532 c
= add_alias_cmd ("assf", "add-shared-symbol-files", class_files
, 1,
3535 c
= add_cmd ("load", class_files
, load_command
,
3536 "Dynamically load FILE into the running program, and record its symbols\n\
3537 for access from GDB.", &cmdlist
);
3538 set_cmd_completer (c
, filename_completer
);
3541 (add_set_cmd ("symbol-reloading", class_support
, var_boolean
,
3542 (char *) &symbol_reloading
,
3543 "Set dynamic symbol table reloading multiple times in one run.",
3547 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3548 "Commands for debugging overlays.", &overlaylist
,
3549 "overlay ", 0, &cmdlist
);
3551 add_com_alias ("ovly", "overlay", class_alias
, 1);
3552 add_com_alias ("ov", "overlay", class_alias
, 1);
3554 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3555 "Assert that an overlay section is mapped.", &overlaylist
);
3557 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3558 "Assert that an overlay section is unmapped.", &overlaylist
);
3560 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3561 "List mappings of overlay sections.", &overlaylist
);
3563 add_cmd ("manual", class_support
, overlay_manual_command
,
3564 "Enable overlay debugging.", &overlaylist
);
3565 add_cmd ("off", class_support
, overlay_off_command
,
3566 "Disable overlay debugging.", &overlaylist
);
3567 add_cmd ("auto", class_support
, overlay_auto_command
,
3568 "Enable automatic overlay debugging.", &overlaylist
);
3569 add_cmd ("load-target", class_support
, overlay_load_command
,
3570 "Read the overlay mapping state from the target.", &overlaylist
);
3572 /* Filename extension to source language lookup table: */
3573 init_filename_language_table ();
3574 c
= add_set_cmd ("extension-language", class_files
, var_string_noescape
,
3576 "Set mapping between filename extension and source language.\n\
3577 Usage: set extension-language .foo bar",
3579 set_cmd_cfunc (c
, set_ext_lang_command
);
3581 add_info ("extensions", info_ext_lang_command
,
3582 "All filename extensions associated with a source language.");
3585 (add_set_cmd ("download-write-size", class_obscure
,
3586 var_integer
, (char *) &download_write_size
,
3587 "Set the write size used when downloading a program.\n"
3588 "Only used when downloading a program onto a remote\n"
3589 "target. Specify zero, or a negative value, to disable\n"
3590 "blocked writes. The actual size of each transfer is also\n"
3591 "limited by the size of the target packet and the memory\n"
3596 debug_file_directory
= xstrdup (DEBUGDIR
);
3598 ("debug-file-directory", class_support
, var_string
,
3599 (char *) &debug_file_directory
,
3600 "Set the directory where separate debug symbols are searched for.\n"
3601 "Separate debug symbols are first searched for in the same\n"
3602 "directory as the binary, then in the `" DEBUG_SUBDIRECTORY
3604 "and lastly at the path of the directory of the binary with\n"
3605 "the global debug-file directory prepended\n",
3607 add_show_from_set (c
, &showlist
);
3608 set_cmd_completer (c
, filename_completer
);