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_som_som_object_present
;
69 extern int hp_cxx_exception_support_initialized
;
70 #define RESET_HP_UX_GLOBALS() do {\
71 hp_som_som_object_present = 0; /* indicates HP-compiled code */ \
72 hp_cxx_exception_support_initialized = 0; /* must reinitialize exception stuff */ \
76 int (*ui_load_progress_hook
) (const char *section
, unsigned long num
);
77 void (*show_load_progress
) (const char *section
,
78 unsigned long section_sent
,
79 unsigned long section_size
,
80 unsigned long total_sent
,
81 unsigned long total_size
);
82 void (*pre_add_symbol_hook
) (char *);
83 void (*post_add_symbol_hook
) (void);
84 void (*target_new_objfile_hook
) (struct objfile
*);
86 static void clear_symtab_users_cleanup (void *ignore
);
88 /* Global variables owned by this file */
89 int readnow_symbol_files
; /* Read full symbols immediately */
91 /* External variables and functions referenced. */
93 extern void report_transfer_performance (unsigned long, time_t, time_t);
95 /* Functions this file defines */
98 static int simple_read_overlay_region_table (void);
99 static void simple_free_overlay_region_table (void);
102 static void set_initial_language (void);
104 static void load_command (char *, int);
106 static void symbol_file_add_main_1 (char *args
, int from_tty
, int flags
);
108 static void add_symbol_file_command (char *, int);
110 static void add_shared_symbol_files_command (char *, int);
112 static void reread_separate_symbols (struct objfile
*objfile
);
114 static void cashier_psymtab (struct partial_symtab
*);
116 bfd
*symfile_bfd_open (char *);
118 int get_section_index (struct objfile
*, char *);
120 static void find_sym_fns (struct objfile
*);
122 static void decrement_reading_symtab (void *);
124 static void overlay_invalidate_all (void);
126 static int overlay_is_mapped (struct obj_section
*);
128 void list_overlays_command (char *, int);
130 void map_overlay_command (char *, int);
132 void unmap_overlay_command (char *, int);
134 static void overlay_auto_command (char *, int);
136 static void overlay_manual_command (char *, int);
138 static void overlay_off_command (char *, int);
140 static void overlay_load_command (char *, int);
142 static void overlay_command (char *, int);
144 static void simple_free_overlay_table (void);
146 static void read_target_long_array (CORE_ADDR
, unsigned int *, int);
148 static int simple_read_overlay_table (void);
150 static int simple_overlay_update_1 (struct obj_section
*);
152 static void add_filename_language (char *ext
, enum language lang
);
154 static void set_ext_lang_command (char *args
, int from_tty
);
156 static void info_ext_lang_command (char *args
, int from_tty
);
158 static char *find_separate_debug_file (struct objfile
*objfile
);
160 static void init_filename_language_table (void);
162 void _initialize_symfile (void);
164 /* List of all available sym_fns. On gdb startup, each object file reader
165 calls add_symtab_fns() to register information on each format it is
168 static struct sym_fns
*symtab_fns
= NULL
;
170 /* Flag for whether user will be reloading symbols multiple times.
171 Defaults to ON for VxWorks, otherwise OFF. */
173 #ifdef SYMBOL_RELOADING_DEFAULT
174 int symbol_reloading
= SYMBOL_RELOADING_DEFAULT
;
176 int symbol_reloading
= 0;
179 /* If non-zero, shared library symbols will be added automatically
180 when the inferior is created, new libraries are loaded, or when
181 attaching to the inferior. This is almost always what users will
182 want to have happen; but for very large programs, the startup time
183 will be excessive, and so if this is a problem, the user can clear
184 this flag and then add the shared library symbols as needed. Note
185 that there is a potential for confusion, since if the shared
186 library symbols are not loaded, commands like "info fun" will *not*
187 report all the functions that are actually present. */
189 int auto_solib_add
= 1;
191 /* For systems that support it, a threshold size in megabytes. If
192 automatically adding a new library's symbol table to those already
193 known to the debugger would cause the total shared library symbol
194 size to exceed this threshhold, then the shlib's symbols are not
195 added. The threshold is ignored if the user explicitly asks for a
196 shlib to be added, such as when using the "sharedlibrary"
199 int auto_solib_limit
;
202 /* This compares two partial symbols by names, using strcmp_iw_ordered
203 for the comparison. */
206 compare_psymbols (const void *s1p
, const void *s2p
)
208 struct partial_symbol
*const *s1
= s1p
;
209 struct partial_symbol
*const *s2
= s2p
;
211 return strcmp_iw_ordered (SYMBOL_NATURAL_NAME (*s1
),
212 SYMBOL_NATURAL_NAME (*s2
));
216 sort_pst_symbols (struct partial_symtab
*pst
)
218 /* Sort the global list; don't sort the static list */
220 qsort (pst
->objfile
->global_psymbols
.list
+ pst
->globals_offset
,
221 pst
->n_global_syms
, sizeof (struct partial_symbol
*),
225 /* Make a null terminated copy of the string at PTR with SIZE characters in
226 the obstack pointed to by OBSTACKP . Returns the address of the copy.
227 Note that the string at PTR does not have to be null terminated, I.E. it
228 may be part of a larger string and we are only saving a substring. */
231 obsavestring (const char *ptr
, int size
, struct obstack
*obstackp
)
233 char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
234 /* Open-coded memcpy--saves function call time. These strings are usually
235 short. FIXME: Is this really still true with a compiler that can
238 const char *p1
= ptr
;
240 const char *end
= ptr
+ size
;
248 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
249 in the obstack pointed to by OBSTACKP. */
252 obconcat (struct obstack
*obstackp
, const char *s1
, const char *s2
,
255 int len
= strlen (s1
) + strlen (s2
) + strlen (s3
) + 1;
256 char *val
= (char *) obstack_alloc (obstackp
, len
);
263 /* True if we are nested inside psymtab_to_symtab. */
265 int currently_reading_symtab
= 0;
268 decrement_reading_symtab (void *dummy
)
270 currently_reading_symtab
--;
273 /* Get the symbol table that corresponds to a partial_symtab.
274 This is fast after the first time you do it. In fact, there
275 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
279 psymtab_to_symtab (struct partial_symtab
*pst
)
281 /* If it's been looked up before, return it. */
285 /* If it has not yet been read in, read it. */
288 struct cleanup
*back_to
= make_cleanup (decrement_reading_symtab
, NULL
);
289 currently_reading_symtab
++;
290 (*pst
->read_symtab
) (pst
);
291 do_cleanups (back_to
);
297 /* Initialize entry point information for this objfile. */
300 init_entry_point_info (struct objfile
*objfile
)
302 /* Save startup file's range of PC addresses to help blockframe.c
303 decide where the bottom of the stack is. */
305 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
307 /* Executable file -- record its entry point so we'll recognize
308 the startup file because it contains the entry point. */
309 objfile
->ei
.entry_point
= bfd_get_start_address (objfile
->obfd
);
313 /* Examination of non-executable.o files. Short-circuit this stuff. */
314 objfile
->ei
.entry_point
= INVALID_ENTRY_POINT
;
316 objfile
->ei
.deprecated_entry_file_lowpc
= INVALID_ENTRY_LOWPC
;
317 objfile
->ei
.deprecated_entry_file_highpc
= INVALID_ENTRY_HIGHPC
;
318 objfile
->ei
.entry_func_lowpc
= INVALID_ENTRY_LOWPC
;
319 objfile
->ei
.entry_func_highpc
= INVALID_ENTRY_HIGHPC
;
320 objfile
->ei
.main_func_lowpc
= INVALID_ENTRY_LOWPC
;
321 objfile
->ei
.main_func_highpc
= INVALID_ENTRY_HIGHPC
;
324 /* Get current entry point address. */
327 entry_point_address (void)
329 return symfile_objfile
? symfile_objfile
->ei
.entry_point
: 0;
332 /* Remember the lowest-addressed loadable section we've seen.
333 This function is called via bfd_map_over_sections.
335 In case of equal vmas, the section with the largest size becomes the
336 lowest-addressed loadable section.
338 If the vmas and sizes are equal, the last section is considered the
339 lowest-addressed loadable section. */
342 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
344 asection
**lowest
= (asection
**) obj
;
346 if (0 == (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
))
349 *lowest
= sect
; /* First loadable section */
350 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
351 *lowest
= sect
; /* A lower loadable section */
352 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
353 && (bfd_section_size (abfd
, (*lowest
))
354 <= bfd_section_size (abfd
, sect
)))
358 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
360 struct section_addr_info
*
361 alloc_section_addr_info (size_t num_sections
)
363 struct section_addr_info
*sap
;
366 size
= (sizeof (struct section_addr_info
)
367 + sizeof (struct other_sections
) * (num_sections
- 1));
368 sap
= (struct section_addr_info
*) xmalloc (size
);
369 memset (sap
, 0, size
);
370 sap
->num_sections
= num_sections
;
375 /* Build (allocate and populate) a section_addr_info struct from
376 an existing section table. */
378 extern struct section_addr_info
*
379 build_section_addr_info_from_section_table (const struct section_table
*start
,
380 const struct section_table
*end
)
382 struct section_addr_info
*sap
;
383 const struct section_table
*stp
;
386 sap
= alloc_section_addr_info (end
- start
);
388 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
390 if (bfd_get_section_flags (stp
->bfd
,
391 stp
->the_bfd_section
) & (SEC_ALLOC
| SEC_LOAD
)
392 && oidx
< end
- start
)
394 sap
->other
[oidx
].addr
= stp
->addr
;
395 sap
->other
[oidx
].name
396 = xstrdup (bfd_section_name (stp
->bfd
, stp
->the_bfd_section
));
397 sap
->other
[oidx
].sectindex
= stp
->the_bfd_section
->index
;
406 /* Free all memory allocated by build_section_addr_info_from_section_table. */
409 free_section_addr_info (struct section_addr_info
*sap
)
413 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
414 if (sap
->other
[idx
].name
)
415 xfree (sap
->other
[idx
].name
);
420 /* Initialize OBJFILE's sect_index_* members. */
422 init_objfile_sect_indices (struct objfile
*objfile
)
427 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
429 objfile
->sect_index_text
= sect
->index
;
431 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
433 objfile
->sect_index_data
= sect
->index
;
435 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
437 objfile
->sect_index_bss
= sect
->index
;
439 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
441 objfile
->sect_index_rodata
= sect
->index
;
443 /* This is where things get really weird... We MUST have valid
444 indices for the various sect_index_* members or gdb will abort.
445 So if for example, there is no ".text" section, we have to
446 accomodate that. Except when explicitly adding symbol files at
447 some address, section_offsets contains nothing but zeros, so it
448 doesn't matter which slot in section_offsets the individual
449 sect_index_* members index into. So if they are all zero, it is
450 safe to just point all the currently uninitialized indices to the
453 for (i
= 0; i
< objfile
->num_sections
; i
++)
455 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
460 if (i
== objfile
->num_sections
)
462 if (objfile
->sect_index_text
== -1)
463 objfile
->sect_index_text
= 0;
464 if (objfile
->sect_index_data
== -1)
465 objfile
->sect_index_data
= 0;
466 if (objfile
->sect_index_bss
== -1)
467 objfile
->sect_index_bss
= 0;
468 if (objfile
->sect_index_rodata
== -1)
469 objfile
->sect_index_rodata
= 0;
474 /* Parse the user's idea of an offset for dynamic linking, into our idea
475 of how to represent it for fast symbol reading. This is the default
476 version of the sym_fns.sym_offsets function for symbol readers that
477 don't need to do anything special. It allocates a section_offsets table
478 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
481 default_symfile_offsets (struct objfile
*objfile
,
482 struct section_addr_info
*addrs
)
486 objfile
->num_sections
= bfd_count_sections (objfile
->obfd
);
487 objfile
->section_offsets
= (struct section_offsets
*)
488 obstack_alloc (&objfile
->objfile_obstack
,
489 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
490 memset (objfile
->section_offsets
, 0,
491 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
493 /* Now calculate offsets for section that were specified by the
495 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
497 struct other_sections
*osp
;
499 osp
= &addrs
->other
[i
] ;
503 /* Record all sections in offsets */
504 /* The section_offsets in the objfile are here filled in using
506 (objfile
->section_offsets
)->offsets
[osp
->sectindex
] = osp
->addr
;
509 /* Remember the bfd indexes for the .text, .data, .bss and
511 init_objfile_sect_indices (objfile
);
515 /* Process a symbol file, as either the main file or as a dynamically
518 OBJFILE is where the symbols are to be read from.
520 ADDRS is the list of section load addresses. If the user has given
521 an 'add-symbol-file' command, then this is the list of offsets and
522 addresses he or she provided as arguments to the command; or, if
523 we're handling a shared library, these are the actual addresses the
524 sections are loaded at, according to the inferior's dynamic linker
525 (as gleaned by GDB's shared library code). We convert each address
526 into an offset from the section VMA's as it appears in the object
527 file, and then call the file's sym_offsets function to convert this
528 into a format-specific offset table --- a `struct section_offsets'.
529 If ADDRS is non-zero, OFFSETS must be zero.
531 OFFSETS is a table of section offsets already in the right
532 format-specific representation. NUM_OFFSETS is the number of
533 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
534 assume this is the proper table the call to sym_offsets described
535 above would produce. Instead of calling sym_offsets, we just dump
536 it right into objfile->section_offsets. (When we're re-reading
537 symbols from an objfile, we don't have the original load address
538 list any more; all we have is the section offset table.) If
539 OFFSETS is non-zero, ADDRS must be zero.
541 MAINLINE is nonzero if this is the main symbol file, or zero if
542 it's an extra symbol file such as dynamically loaded code.
544 VERBO is nonzero if the caller has printed a verbose message about
545 the symbol reading (and complaints can be more terse about it). */
548 syms_from_objfile (struct objfile
*objfile
,
549 struct section_addr_info
*addrs
,
550 struct section_offsets
*offsets
,
555 struct section_addr_info
*local_addr
= NULL
;
556 struct cleanup
*old_chain
;
558 gdb_assert (! (addrs
&& offsets
));
560 init_entry_point_info (objfile
);
561 find_sym_fns (objfile
);
563 if (objfile
->sf
== NULL
)
564 return; /* No symbols. */
566 /* Make sure that partially constructed symbol tables will be cleaned up
567 if an error occurs during symbol reading. */
568 old_chain
= make_cleanup_free_objfile (objfile
);
570 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
571 list. We now establish the convention that an addr of zero means
572 no load address was specified. */
573 if (! addrs
&& ! offsets
)
576 = alloc_section_addr_info (bfd_count_sections (objfile
->obfd
));
577 make_cleanup (xfree
, local_addr
);
581 /* Now either addrs or offsets is non-zero. */
585 /* We will modify the main symbol table, make sure that all its users
586 will be cleaned up if an error occurs during symbol reading. */
587 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
589 /* Since no error yet, throw away the old symbol table. */
591 if (symfile_objfile
!= NULL
)
593 free_objfile (symfile_objfile
);
594 symfile_objfile
= NULL
;
597 /* Currently we keep symbols from the add-symbol-file command.
598 If the user wants to get rid of them, they should do "symbol-file"
599 without arguments first. Not sure this is the best behavior
602 (*objfile
->sf
->sym_new_init
) (objfile
);
605 /* Convert addr into an offset rather than an absolute address.
606 We find the lowest address of a loaded segment in the objfile,
607 and assume that <addr> is where that got loaded.
609 We no longer warn if the lowest section is not a text segment (as
610 happens for the PA64 port. */
611 if (!mainline
&& addrs
&& addrs
->other
[0].name
)
613 asection
*lower_sect
;
615 CORE_ADDR lower_offset
;
618 /* Find lowest loadable section to be used as starting point for
619 continguous sections. FIXME!! won't work without call to find
620 .text first, but this assumes text is lowest section. */
621 lower_sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
622 if (lower_sect
== NULL
)
623 bfd_map_over_sections (objfile
->obfd
, find_lowest_section
,
625 if (lower_sect
== NULL
)
626 warning ("no loadable sections found in added symbol-file %s",
629 if ((bfd_get_section_flags (objfile
->obfd
, lower_sect
) & SEC_CODE
) == 0)
630 warning ("Lowest section in %s is %s at %s",
632 bfd_section_name (objfile
->obfd
, lower_sect
),
633 paddr (bfd_section_vma (objfile
->obfd
, lower_sect
)));
634 if (lower_sect
!= NULL
)
635 lower_offset
= bfd_section_vma (objfile
->obfd
, lower_sect
);
639 /* Calculate offsets for the loadable sections.
640 FIXME! Sections must be in order of increasing loadable section
641 so that contiguous sections can use the lower-offset!!!
643 Adjust offsets if the segments are not contiguous.
644 If the section is contiguous, its offset should be set to
645 the offset of the highest loadable section lower than it
646 (the loadable section directly below it in memory).
647 this_offset = lower_offset = lower_addr - lower_orig_addr */
649 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
651 if (addrs
->other
[i
].addr
!= 0)
653 sect
= bfd_get_section_by_name (objfile
->obfd
,
654 addrs
->other
[i
].name
);
658 -= bfd_section_vma (objfile
->obfd
, sect
);
659 lower_offset
= addrs
->other
[i
].addr
;
660 /* This is the index used by BFD. */
661 addrs
->other
[i
].sectindex
= sect
->index
;
665 warning ("section %s not found in %s",
666 addrs
->other
[i
].name
,
668 addrs
->other
[i
].addr
= 0;
672 addrs
->other
[i
].addr
= lower_offset
;
676 /* Initialize symbol reading routines for this objfile, allow complaints to
677 appear for this new file, and record how verbose to be, then do the
678 initial symbol reading for this file. */
680 (*objfile
->sf
->sym_init
) (objfile
);
681 clear_complaints (&symfile_complaints
, 1, verbo
);
684 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
687 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_offsets
);
689 /* Just copy in the offset table directly as given to us. */
690 objfile
->num_sections
= num_offsets
;
691 objfile
->section_offsets
692 = ((struct section_offsets
*)
693 obstack_alloc (&objfile
->objfile_obstack
, size
));
694 memcpy (objfile
->section_offsets
, offsets
, size
);
696 init_objfile_sect_indices (objfile
);
699 #ifndef DEPRECATED_IBM6000_TARGET
700 /* This is a SVR4/SunOS specific hack, I think. In any event, it
701 screws RS/6000. sym_offsets should be doing this sort of thing,
702 because it knows the mapping between bfd sections and
704 /* This is a hack. As far as I can tell, section offsets are not
705 target dependent. They are all set to addr with a couple of
706 exceptions. The exceptions are sysvr4 shared libraries, whose
707 offsets are kept in solib structures anyway and rs6000 xcoff
708 which handles shared libraries in a completely unique way.
710 Section offsets are built similarly, except that they are built
711 by adding addr in all cases because there is no clear mapping
712 from section_offsets into actual sections. Note that solib.c
713 has a different algorithm for finding section offsets.
715 These should probably all be collapsed into some target
716 independent form of shared library support. FIXME. */
720 struct obj_section
*s
;
722 /* Map section offsets in "addr" back to the object's
723 sections by comparing the section names with bfd's
724 section names. Then adjust the section address by
725 the offset. */ /* for gdb/13815 */
727 ALL_OBJFILE_OSECTIONS (objfile
, s
)
729 CORE_ADDR s_addr
= 0;
733 !s_addr
&& i
< addrs
->num_sections
&& addrs
->other
[i
].name
;
735 if (strcmp (bfd_section_name (s
->objfile
->obfd
,
737 addrs
->other
[i
].name
) == 0)
738 s_addr
= addrs
->other
[i
].addr
; /* end added for gdb/13815 */
740 s
->addr
-= s
->offset
;
742 s
->endaddr
-= s
->offset
;
743 s
->endaddr
+= s_addr
;
747 #endif /* not DEPRECATED_IBM6000_TARGET */
749 (*objfile
->sf
->sym_read
) (objfile
, mainline
);
751 /* Don't allow char * to have a typename (else would get caddr_t).
752 Ditto void *. FIXME: Check whether this is now done by all the
753 symbol readers themselves (many of them now do), and if so remove
756 TYPE_NAME (lookup_pointer_type (builtin_type_char
)) = 0;
757 TYPE_NAME (lookup_pointer_type (builtin_type_void
)) = 0;
759 /* Mark the objfile has having had initial symbol read attempted. Note
760 that this does not mean we found any symbols... */
762 objfile
->flags
|= OBJF_SYMS
;
764 /* Discard cleanups as symbol reading was successful. */
766 discard_cleanups (old_chain
);
769 /* Perform required actions after either reading in the initial
770 symbols for a new objfile, or mapping in the symbols from a reusable
774 new_symfile_objfile (struct objfile
*objfile
, int mainline
, int verbo
)
777 /* If this is the main symbol file we have to clean up all users of the
778 old main symbol file. Otherwise it is sufficient to fixup all the
779 breakpoints that may have been redefined by this symbol file. */
782 /* OK, make it the "real" symbol file. */
783 symfile_objfile
= objfile
;
785 clear_symtab_users ();
789 breakpoint_re_set ();
792 /* We're done reading the symbol file; finish off complaints. */
793 clear_complaints (&symfile_complaints
, 0, verbo
);
796 /* Process a symbol file, as either the main file or as a dynamically
799 NAME is the file name (which will be tilde-expanded and made
800 absolute herein) (but we don't free or modify NAME itself).
802 FROM_TTY says how verbose to be.
804 MAINLINE specifies whether this is the main symbol file, or whether
805 it's an extra symbol file such as dynamically loaded code.
807 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
808 syms_from_objfile, above. ADDRS is ignored when MAINLINE is
811 Upon success, returns a pointer to the objfile that was added.
812 Upon failure, jumps back to command level (never returns). */
813 static struct objfile
*
814 symbol_file_add_with_addrs_or_offsets (char *name
, int from_tty
,
815 struct section_addr_info
*addrs
,
816 struct section_offsets
*offsets
,
818 int mainline
, int flags
)
820 struct objfile
*objfile
;
821 struct partial_symtab
*psymtab
;
824 struct section_addr_info
*orig_addrs
;
825 struct cleanup
*my_cleanups
;
827 /* Open a bfd for the file, and give user a chance to burp if we'd be
828 interactively wiping out any existing symbols. */
830 abfd
= symfile_bfd_open (name
);
832 if ((have_full_symbols () || have_partial_symbols ())
835 && !query ("Load new symbol table from \"%s\"? ", name
))
836 error ("Not confirmed.");
838 objfile
= allocate_objfile (abfd
, flags
);
840 orig_addrs
= alloc_section_addr_info (bfd_count_sections (abfd
));
841 my_cleanups
= make_cleanup (xfree
, orig_addrs
);
845 orig_addrs
->num_sections
= addrs
->num_sections
;
846 for (i
= 0; i
< addrs
->num_sections
; i
++)
847 orig_addrs
->other
[i
] = addrs
->other
[i
];
850 /* We either created a new mapped symbol table, mapped an existing
851 symbol table file which has not had initial symbol reading
852 performed, or need to read an unmapped symbol table. */
853 if (from_tty
|| info_verbose
)
855 if (pre_add_symbol_hook
)
856 pre_add_symbol_hook (name
);
859 printf_unfiltered ("Reading symbols from %s...", name
);
861 gdb_flush (gdb_stdout
);
864 syms_from_objfile (objfile
, addrs
, offsets
, num_offsets
,
867 /* We now have at least a partial symbol table. Check to see if the
868 user requested that all symbols be read on initial access via either
869 the gdb startup command line or on a per symbol file basis. Expand
870 all partial symbol tables for this objfile if so. */
872 if ((flags
& OBJF_READNOW
) || readnow_symbol_files
)
874 if (from_tty
|| info_verbose
)
876 printf_unfiltered ("expanding to full symbols...");
878 gdb_flush (gdb_stdout
);
881 for (psymtab
= objfile
->psymtabs
;
883 psymtab
= psymtab
->next
)
885 psymtab_to_symtab (psymtab
);
889 debugfile
= find_separate_debug_file (objfile
);
894 objfile
->separate_debug_objfile
895 = symbol_file_add (debugfile
, from_tty
, orig_addrs
, 0, flags
);
899 objfile
->separate_debug_objfile
900 = symbol_file_add (debugfile
, from_tty
, NULL
, 0, flags
);
902 objfile
->separate_debug_objfile
->separate_debug_objfile_backlink
905 /* Put the separate debug object before the normal one, this is so that
906 usage of the ALL_OBJFILES_SAFE macro will stay safe. */
907 put_objfile_before (objfile
->separate_debug_objfile
, objfile
);
912 if (!have_partial_symbols () && !have_full_symbols ())
915 printf_unfiltered ("(no debugging symbols found)...");
919 if (from_tty
|| info_verbose
)
921 if (post_add_symbol_hook
)
922 post_add_symbol_hook ();
925 printf_unfiltered ("done.\n");
929 /* We print some messages regardless of whether 'from_tty ||
930 info_verbose' is true, so make sure they go out at the right
932 gdb_flush (gdb_stdout
);
934 do_cleanups (my_cleanups
);
936 if (objfile
->sf
== NULL
)
937 return objfile
; /* No symbols. */
939 new_symfile_objfile (objfile
, mainline
, from_tty
);
941 if (target_new_objfile_hook
)
942 target_new_objfile_hook (objfile
);
948 /* Process a symbol file, as either the main file or as a dynamically
949 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
952 symbol_file_add (char *name
, int from_tty
, struct section_addr_info
*addrs
,
953 int mainline
, int flags
)
955 return symbol_file_add_with_addrs_or_offsets (name
, from_tty
, addrs
, 0, 0,
960 /* Call symbol_file_add() with default values and update whatever is
961 affected by the loading of a new main().
962 Used when the file is supplied in the gdb command line
963 and by some targets with special loading requirements.
964 The auxiliary function, symbol_file_add_main_1(), has the flags
965 argument for the switches that can only be specified in the symbol_file
969 symbol_file_add_main (char *args
, int from_tty
)
971 symbol_file_add_main_1 (args
, from_tty
, 0);
975 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
977 symbol_file_add (args
, from_tty
, NULL
, 1, flags
);
980 RESET_HP_UX_GLOBALS ();
983 /* Getting new symbols may change our opinion about
984 what is frameless. */
985 reinit_frame_cache ();
987 set_initial_language ();
991 symbol_file_clear (int from_tty
)
993 if ((have_full_symbols () || have_partial_symbols ())
995 && !query ("Discard symbol table from `%s'? ",
996 symfile_objfile
->name
))
997 error ("Not confirmed.");
998 free_all_objfiles ();
1000 /* solib descriptors may have handles to objfiles. Since their
1001 storage has just been released, we'd better wipe the solib
1002 descriptors as well.
1004 #if defined(SOLIB_RESTART)
1008 symfile_objfile
= NULL
;
1010 printf_unfiltered ("No symbol file now.\n");
1012 RESET_HP_UX_GLOBALS ();
1017 get_debug_link_info (struct objfile
*objfile
, unsigned long *crc32_out
)
1020 bfd_size_type debuglink_size
;
1021 unsigned long crc32
;
1026 sect
= bfd_get_section_by_name (objfile
->obfd
, ".gnu_debuglink");
1031 debuglink_size
= bfd_section_size (objfile
->obfd
, sect
);
1033 contents
= xmalloc (debuglink_size
);
1034 bfd_get_section_contents (objfile
->obfd
, sect
, contents
,
1035 (file_ptr
)0, (bfd_size_type
)debuglink_size
);
1037 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1038 crc_offset
= strlen (contents
) + 1;
1039 crc_offset
= (crc_offset
+ 3) & ~3;
1041 crc32
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) (contents
+ crc_offset
));
1048 separate_debug_file_exists (const char *name
, unsigned long crc
)
1050 unsigned long file_crc
= 0;
1052 char buffer
[8*1024];
1055 fd
= open (name
, O_RDONLY
| O_BINARY
);
1059 while ((count
= read (fd
, buffer
, sizeof (buffer
))) > 0)
1060 file_crc
= gnu_debuglink_crc32 (file_crc
, buffer
, count
);
1064 return crc
== file_crc
;
1067 static char *debug_file_directory
= NULL
;
1069 #if ! defined (DEBUG_SUBDIRECTORY)
1070 #define DEBUG_SUBDIRECTORY ".debug"
1074 find_separate_debug_file (struct objfile
*objfile
)
1081 bfd_size_type debuglink_size
;
1082 unsigned long crc32
;
1085 basename
= get_debug_link_info (objfile
, &crc32
);
1087 if (basename
== NULL
)
1090 dir
= xstrdup (objfile
->name
);
1092 /* Strip off the final filename part, leaving the directory name,
1093 followed by a slash. Objfile names should always be absolute and
1094 tilde-expanded, so there should always be a slash in there
1096 for (i
= strlen(dir
) - 1; i
>= 0; i
--)
1098 if (IS_DIR_SEPARATOR (dir
[i
]))
1101 gdb_assert (i
>= 0 && IS_DIR_SEPARATOR (dir
[i
]));
1104 debugfile
= alloca (strlen (debug_file_directory
) + 1
1106 + strlen (DEBUG_SUBDIRECTORY
)
1111 /* First try in the same directory as the original file. */
1112 strcpy (debugfile
, dir
);
1113 strcat (debugfile
, basename
);
1115 if (separate_debug_file_exists (debugfile
, crc32
))
1119 return xstrdup (debugfile
);
1122 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1123 strcpy (debugfile
, dir
);
1124 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1125 strcat (debugfile
, "/");
1126 strcat (debugfile
, basename
);
1128 if (separate_debug_file_exists (debugfile
, crc32
))
1132 return xstrdup (debugfile
);
1135 /* Then try in the global debugfile directory. */
1136 strcpy (debugfile
, debug_file_directory
);
1137 strcat (debugfile
, "/");
1138 strcat (debugfile
, dir
);
1139 strcat (debugfile
, basename
);
1141 if (separate_debug_file_exists (debugfile
, crc32
))
1145 return xstrdup (debugfile
);
1154 /* This is the symbol-file command. Read the file, analyze its
1155 symbols, and add a struct symtab to a symtab list. The syntax of
1156 the command is rather bizarre--(1) buildargv implements various
1157 quoting conventions which are undocumented and have little or
1158 nothing in common with the way things are quoted (or not quoted)
1159 elsewhere in GDB, (2) options are used, which are not generally
1160 used in GDB (perhaps "set mapped on", "set readnow on" would be
1161 better), (3) the order of options matters, which is contrary to GNU
1162 conventions (because it is confusing and inconvenient). */
1163 /* Note: ezannoni 2000-04-17. This function used to have support for
1164 rombug (see remote-os9k.c). It consisted of a call to target_link()
1165 (target.c) to get the address of the text segment from the target,
1166 and pass that to symbol_file_add(). This is no longer supported. */
1169 symbol_file_command (char *args
, int from_tty
)
1173 struct cleanup
*cleanups
;
1174 int flags
= OBJF_USERLOADED
;
1180 symbol_file_clear (from_tty
);
1184 if ((argv
= buildargv (args
)) == NULL
)
1188 cleanups
= make_cleanup_freeargv (argv
);
1189 while (*argv
!= NULL
)
1191 if (strcmp (*argv
, "-readnow") == 0)
1192 flags
|= OBJF_READNOW
;
1193 else if (**argv
== '-')
1194 error ("unknown option `%s'", *argv
);
1199 symbol_file_add_main_1 (name
, from_tty
, flags
);
1206 error ("no symbol file name was specified");
1208 do_cleanups (cleanups
);
1212 /* Set the initial language.
1214 A better solution would be to record the language in the psymtab when reading
1215 partial symbols, and then use it (if known) to set the language. This would
1216 be a win for formats that encode the language in an easily discoverable place,
1217 such as DWARF. For stabs, we can jump through hoops looking for specially
1218 named symbols or try to intuit the language from the specific type of stabs
1219 we find, but we can't do that until later when we read in full symbols.
1223 set_initial_language (void)
1225 struct partial_symtab
*pst
;
1226 enum language lang
= language_unknown
;
1228 pst
= find_main_psymtab ();
1231 if (pst
->filename
!= NULL
)
1233 lang
= deduce_language_from_filename (pst
->filename
);
1235 if (lang
== language_unknown
)
1237 /* Make C the default language */
1240 set_language (lang
);
1241 expected_language
= current_language
; /* Don't warn the user */
1245 /* Open file specified by NAME and hand it off to BFD for preliminary
1246 analysis. Result is a newly initialized bfd *, which includes a newly
1247 malloc'd` copy of NAME (tilde-expanded and made absolute).
1248 In case of trouble, error() is called. */
1251 symfile_bfd_open (char *name
)
1255 char *absolute_name
;
1259 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy */
1261 /* Look down path for it, allocate 2nd new malloc'd copy. */
1262 desc
= openp (getenv ("PATH"), 1, name
, O_RDONLY
| O_BINARY
, 0, &absolute_name
);
1263 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1266 char *exename
= alloca (strlen (name
) + 5);
1267 strcat (strcpy (exename
, name
), ".exe");
1268 desc
= openp (getenv ("PATH"), 1, exename
, O_RDONLY
| O_BINARY
,
1274 make_cleanup (xfree
, name
);
1275 perror_with_name (name
);
1277 xfree (name
); /* Free 1st new malloc'd copy */
1278 name
= absolute_name
; /* Keep 2nd malloc'd copy in bfd */
1279 /* It'll be freed in free_objfile(). */
1281 sym_bfd
= bfd_fdopenr (name
, gnutarget
, desc
);
1285 make_cleanup (xfree
, name
);
1286 error ("\"%s\": can't open to read symbols: %s.", name
,
1287 bfd_errmsg (bfd_get_error ()));
1289 sym_bfd
->cacheable
= 1;
1291 if (!bfd_check_format (sym_bfd
, bfd_object
))
1293 /* FIXME: should be checking for errors from bfd_close (for one thing,
1294 on error it does not free all the storage associated with the
1296 bfd_close (sym_bfd
); /* This also closes desc */
1297 make_cleanup (xfree
, name
);
1298 error ("\"%s\": can't read symbols: %s.", name
,
1299 bfd_errmsg (bfd_get_error ()));
1304 /* Return the section index for the given section name. Return -1 if
1305 the section was not found. */
1307 get_section_index (struct objfile
*objfile
, char *section_name
)
1309 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1316 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1317 startup by the _initialize routine in each object file format reader,
1318 to register information about each format the the reader is prepared
1322 add_symtab_fns (struct sym_fns
*sf
)
1324 sf
->next
= symtab_fns
;
1329 /* Initialize to read symbols from the symbol file sym_bfd. It either
1330 returns or calls error(). The result is an initialized struct sym_fns
1331 in the objfile structure, that contains cached information about the
1335 find_sym_fns (struct objfile
*objfile
)
1338 enum bfd_flavour our_flavour
= bfd_get_flavour (objfile
->obfd
);
1339 char *our_target
= bfd_get_target (objfile
->obfd
);
1341 if (our_flavour
== bfd_target_srec_flavour
1342 || our_flavour
== bfd_target_ihex_flavour
1343 || our_flavour
== bfd_target_tekhex_flavour
)
1344 return; /* No symbols. */
1346 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
->next
)
1348 if (our_flavour
== sf
->sym_flavour
)
1354 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
1355 bfd_get_target (objfile
->obfd
));
1358 /* This function runs the load command of our current target. */
1361 load_command (char *arg
, int from_tty
)
1364 arg
= get_exec_file (1);
1365 target_load (arg
, from_tty
);
1367 /* After re-loading the executable, we don't really know which
1368 overlays are mapped any more. */
1369 overlay_cache_invalid
= 1;
1372 /* This version of "load" should be usable for any target. Currently
1373 it is just used for remote targets, not inftarg.c or core files,
1374 on the theory that only in that case is it useful.
1376 Avoiding xmodem and the like seems like a win (a) because we don't have
1377 to worry about finding it, and (b) On VMS, fork() is very slow and so
1378 we don't want to run a subprocess. On the other hand, I'm not sure how
1379 performance compares. */
1381 static int download_write_size
= 512;
1382 static int validate_download
= 0;
1384 /* Callback service function for generic_load (bfd_map_over_sections). */
1387 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1389 bfd_size_type
*sum
= data
;
1391 *sum
+= bfd_get_section_size_before_reloc (asec
);
1394 /* Opaque data for load_section_callback. */
1395 struct load_section_data
{
1396 unsigned long load_offset
;
1397 unsigned long write_count
;
1398 unsigned long data_count
;
1399 bfd_size_type total_size
;
1402 /* Callback service function for generic_load (bfd_map_over_sections). */
1405 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1407 struct load_section_data
*args
= data
;
1409 if (bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
)
1411 bfd_size_type size
= bfd_get_section_size_before_reloc (asec
);
1415 struct cleanup
*old_chain
;
1416 CORE_ADDR lma
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1417 bfd_size_type block_size
;
1419 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1422 if (download_write_size
> 0 && size
> download_write_size
)
1423 block_size
= download_write_size
;
1427 buffer
= xmalloc (size
);
1428 old_chain
= make_cleanup (xfree
, buffer
);
1430 /* Is this really necessary? I guess it gives the user something
1431 to look at during a long download. */
1432 ui_out_message (uiout
, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1433 sect_name
, paddr_nz (size
), paddr_nz (lma
));
1435 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1441 bfd_size_type this_transfer
= size
- sent
;
1443 if (this_transfer
>= block_size
)
1444 this_transfer
= block_size
;
1445 len
= target_write_memory_partial (lma
, buffer
,
1446 this_transfer
, &err
);
1449 if (validate_download
)
1451 /* Broken memories and broken monitors manifest
1452 themselves here when bring new computers to
1453 life. This doubles already slow downloads. */
1454 /* NOTE: cagney/1999-10-18: A more efficient
1455 implementation might add a verify_memory()
1456 method to the target vector and then use
1457 that. remote.c could implement that method
1458 using the ``qCRC'' packet. */
1459 char *check
= xmalloc (len
);
1460 struct cleanup
*verify_cleanups
=
1461 make_cleanup (xfree
, check
);
1463 if (target_read_memory (lma
, check
, len
) != 0)
1464 error ("Download verify read failed at 0x%s",
1466 if (memcmp (buffer
, check
, len
) != 0)
1467 error ("Download verify compare failed at 0x%s",
1469 do_cleanups (verify_cleanups
);
1471 args
->data_count
+= len
;
1474 args
->write_count
+= 1;
1477 || (ui_load_progress_hook
!= NULL
1478 && ui_load_progress_hook (sect_name
, sent
)))
1479 error ("Canceled the download");
1481 if (show_load_progress
!= NULL
)
1482 show_load_progress (sect_name
, sent
, size
,
1483 args
->data_count
, args
->total_size
);
1485 while (sent
< size
);
1488 error ("Memory access error while loading section %s.", sect_name
);
1490 do_cleanups (old_chain
);
1496 generic_load (char *args
, int from_tty
)
1500 time_t start_time
, end_time
; /* Start and end times of download */
1502 struct cleanup
*old_cleanups
;
1504 struct load_section_data cbdata
;
1507 cbdata
.load_offset
= 0; /* Offset to add to vma for each section. */
1508 cbdata
.write_count
= 0; /* Number of writes needed. */
1509 cbdata
.data_count
= 0; /* Number of bytes written to target memory. */
1510 cbdata
.total_size
= 0; /* Total size of all bfd sectors. */
1512 /* Parse the input argument - the user can specify a load offset as
1513 a second argument. */
1514 filename
= xmalloc (strlen (args
) + 1);
1515 old_cleanups
= make_cleanup (xfree
, filename
);
1516 strcpy (filename
, args
);
1517 offptr
= strchr (filename
, ' ');
1522 cbdata
.load_offset
= strtoul (offptr
, &endptr
, 0);
1523 if (offptr
== endptr
)
1524 error ("Invalid download offset:%s\n", offptr
);
1528 cbdata
.load_offset
= 0;
1530 /* Open the file for loading. */
1531 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
1532 if (loadfile_bfd
== NULL
)
1534 perror_with_name (filename
);
1538 /* FIXME: should be checking for errors from bfd_close (for one thing,
1539 on error it does not free all the storage associated with the
1541 make_cleanup_bfd_close (loadfile_bfd
);
1543 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
1545 error ("\"%s\" is not an object file: %s", filename
,
1546 bfd_errmsg (bfd_get_error ()));
1549 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
1550 (void *) &cbdata
.total_size
);
1552 start_time
= time (NULL
);
1554 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
1556 end_time
= time (NULL
);
1558 entry
= bfd_get_start_address (loadfile_bfd
);
1559 ui_out_text (uiout
, "Start address ");
1560 ui_out_field_fmt (uiout
, "address", "0x%s", paddr_nz (entry
));
1561 ui_out_text (uiout
, ", load size ");
1562 ui_out_field_fmt (uiout
, "load-size", "%lu", cbdata
.data_count
);
1563 ui_out_text (uiout
, "\n");
1564 /* We were doing this in remote-mips.c, I suspect it is right
1565 for other targets too. */
1568 /* FIXME: are we supposed to call symbol_file_add or not? According
1569 to a comment from remote-mips.c (where a call to symbol_file_add
1570 was commented out), making the call confuses GDB if more than one
1571 file is loaded in. Some targets do (e.g., remote-vx.c) but
1572 others don't (or didn't - perhaphs they have all been deleted). */
1574 print_transfer_performance (gdb_stdout
, cbdata
.data_count
,
1575 cbdata
.write_count
, end_time
- start_time
);
1577 do_cleanups (old_cleanups
);
1580 /* Report how fast the transfer went. */
1582 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1583 replaced by print_transfer_performance (with a very different
1584 function signature). */
1587 report_transfer_performance (unsigned long data_count
, time_t start_time
,
1590 print_transfer_performance (gdb_stdout
, data_count
,
1591 end_time
- start_time
, 0);
1595 print_transfer_performance (struct ui_file
*stream
,
1596 unsigned long data_count
,
1597 unsigned long write_count
,
1598 unsigned long time_count
)
1600 ui_out_text (uiout
, "Transfer rate: ");
1603 ui_out_field_fmt (uiout
, "transfer-rate", "%lu",
1604 (data_count
* 8) / time_count
);
1605 ui_out_text (uiout
, " bits/sec");
1609 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
1610 ui_out_text (uiout
, " bits in <1 sec");
1612 if (write_count
> 0)
1614 ui_out_text (uiout
, ", ");
1615 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
1616 ui_out_text (uiout
, " bytes/write");
1618 ui_out_text (uiout
, ".\n");
1621 /* This function allows the addition of incrementally linked object files.
1622 It does not modify any state in the target, only in the debugger. */
1623 /* Note: ezannoni 2000-04-13 This function/command used to have a
1624 special case syntax for the rombug target (Rombug is the boot
1625 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
1626 rombug case, the user doesn't need to supply a text address,
1627 instead a call to target_link() (in target.c) would supply the
1628 value to use. We are now discontinuing this type of ad hoc syntax. */
1631 add_symbol_file_command (char *args
, int from_tty
)
1633 char *filename
= NULL
;
1634 int flags
= OBJF_USERLOADED
;
1636 int expecting_option
= 0;
1637 int section_index
= 0;
1641 int expecting_sec_name
= 0;
1642 int expecting_sec_addr
= 0;
1650 struct section_addr_info
*section_addrs
;
1651 struct sect_opt
*sect_opts
= NULL
;
1652 size_t num_sect_opts
= 0;
1653 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
1656 sect_opts
= (struct sect_opt
*) xmalloc (num_sect_opts
1657 * sizeof (struct sect_opt
));
1662 error ("add-symbol-file takes a file name and an address");
1664 /* Make a copy of the string that we can safely write into. */
1665 args
= xstrdup (args
);
1667 while (*args
!= '\000')
1669 /* Any leading spaces? */
1670 while (isspace (*args
))
1673 /* Point arg to the beginning of the argument. */
1676 /* Move args pointer over the argument. */
1677 while ((*args
!= '\000') && !isspace (*args
))
1680 /* If there are more arguments, terminate arg and
1682 if (*args
!= '\000')
1685 /* Now process the argument. */
1688 /* The first argument is the file name. */
1689 filename
= tilde_expand (arg
);
1690 make_cleanup (xfree
, filename
);
1695 /* The second argument is always the text address at which
1696 to load the program. */
1697 sect_opts
[section_index
].name
= ".text";
1698 sect_opts
[section_index
].value
= arg
;
1699 if (++section_index
> num_sect_opts
)
1702 sect_opts
= ((struct sect_opt
*)
1703 xrealloc (sect_opts
,
1705 * sizeof (struct sect_opt
)));
1710 /* It's an option (starting with '-') or it's an argument
1715 if (strcmp (arg
, "-readnow") == 0)
1716 flags
|= OBJF_READNOW
;
1717 else if (strcmp (arg
, "-s") == 0)
1719 expecting_sec_name
= 1;
1720 expecting_sec_addr
= 1;
1725 if (expecting_sec_name
)
1727 sect_opts
[section_index
].name
= arg
;
1728 expecting_sec_name
= 0;
1731 if (expecting_sec_addr
)
1733 sect_opts
[section_index
].value
= arg
;
1734 expecting_sec_addr
= 0;
1735 if (++section_index
> num_sect_opts
)
1738 sect_opts
= ((struct sect_opt
*)
1739 xrealloc (sect_opts
,
1741 * sizeof (struct sect_opt
)));
1745 error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*");
1751 /* Print the prompt for the query below. And save the arguments into
1752 a sect_addr_info structure to be passed around to other
1753 functions. We have to split this up into separate print
1754 statements because local_hex_string returns a local static
1757 printf_unfiltered ("add symbol table from file \"%s\" at\n", filename
);
1758 section_addrs
= alloc_section_addr_info (section_index
);
1759 make_cleanup (xfree
, section_addrs
);
1760 for (i
= 0; i
< section_index
; i
++)
1763 char *val
= sect_opts
[i
].value
;
1764 char *sec
= sect_opts
[i
].name
;
1766 addr
= parse_and_eval_address (val
);
1768 /* Here we store the section offsets in the order they were
1769 entered on the command line. */
1770 section_addrs
->other
[sec_num
].name
= sec
;
1771 section_addrs
->other
[sec_num
].addr
= addr
;
1772 printf_unfiltered ("\t%s_addr = %s\n",
1774 local_hex_string ((unsigned long)addr
));
1777 /* The object's sections are initialized when a
1778 call is made to build_objfile_section_table (objfile).
1779 This happens in reread_symbols.
1780 At this point, we don't know what file type this is,
1781 so we can't determine what section names are valid. */
1784 if (from_tty
&& (!query ("%s", "")))
1785 error ("Not confirmed.");
1787 symbol_file_add (filename
, from_tty
, section_addrs
, 0, flags
);
1789 /* Getting new symbols may change our opinion about what is
1791 reinit_frame_cache ();
1792 do_cleanups (my_cleanups
);
1796 add_shared_symbol_files_command (char *args
, int from_tty
)
1798 #ifdef ADD_SHARED_SYMBOL_FILES
1799 ADD_SHARED_SYMBOL_FILES (args
, from_tty
);
1801 error ("This command is not available in this configuration of GDB.");
1805 /* Re-read symbols if a symbol-file has changed. */
1807 reread_symbols (void)
1809 struct objfile
*objfile
;
1812 struct stat new_statbuf
;
1815 /* With the addition of shared libraries, this should be modified,
1816 the load time should be saved in the partial symbol tables, since
1817 different tables may come from different source files. FIXME.
1818 This routine should then walk down each partial symbol table
1819 and see if the symbol table that it originates from has been changed */
1821 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
1825 #ifdef DEPRECATED_IBM6000_TARGET
1826 /* If this object is from a shared library, then you should
1827 stat on the library name, not member name. */
1829 if (objfile
->obfd
->my_archive
)
1830 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
1833 res
= stat (objfile
->name
, &new_statbuf
);
1836 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1837 printf_unfiltered ("`%s' has disappeared; keeping its symbols.\n",
1841 new_modtime
= new_statbuf
.st_mtime
;
1842 if (new_modtime
!= objfile
->mtime
)
1844 struct cleanup
*old_cleanups
;
1845 struct section_offsets
*offsets
;
1847 char *obfd_filename
;
1849 printf_unfiltered ("`%s' has changed; re-reading symbols.\n",
1852 /* There are various functions like symbol_file_add,
1853 symfile_bfd_open, syms_from_objfile, etc., which might
1854 appear to do what we want. But they have various other
1855 effects which we *don't* want. So we just do stuff
1856 ourselves. We don't worry about mapped files (for one thing,
1857 any mapped file will be out of date). */
1859 /* If we get an error, blow away this objfile (not sure if
1860 that is the correct response for things like shared
1862 old_cleanups
= make_cleanup_free_objfile (objfile
);
1863 /* We need to do this whenever any symbols go away. */
1864 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
1866 /* Clean up any state BFD has sitting around. We don't need
1867 to close the descriptor but BFD lacks a way of closing the
1868 BFD without closing the descriptor. */
1869 obfd_filename
= bfd_get_filename (objfile
->obfd
);
1870 if (!bfd_close (objfile
->obfd
))
1871 error ("Can't close BFD for %s: %s", objfile
->name
,
1872 bfd_errmsg (bfd_get_error ()));
1873 objfile
->obfd
= bfd_openr (obfd_filename
, gnutarget
);
1874 if (objfile
->obfd
== NULL
)
1875 error ("Can't open %s to read symbols.", objfile
->name
);
1876 /* bfd_openr sets cacheable to true, which is what we want. */
1877 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
1878 error ("Can't read symbols from %s: %s.", objfile
->name
,
1879 bfd_errmsg (bfd_get_error ()));
1881 /* Save the offsets, we will nuke them with the rest of the
1883 num_offsets
= objfile
->num_sections
;
1884 offsets
= ((struct section_offsets
*)
1885 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
1886 memcpy (offsets
, objfile
->section_offsets
,
1887 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
1889 /* Nuke all the state that we will re-read. Much of the following
1890 code which sets things to NULL really is necessary to tell
1891 other parts of GDB that there is nothing currently there. */
1893 /* FIXME: Do we have to free a whole linked list, or is this
1895 if (objfile
->global_psymbols
.list
)
1896 xmfree (objfile
->md
, objfile
->global_psymbols
.list
);
1897 memset (&objfile
->global_psymbols
, 0,
1898 sizeof (objfile
->global_psymbols
));
1899 if (objfile
->static_psymbols
.list
)
1900 xmfree (objfile
->md
, objfile
->static_psymbols
.list
);
1901 memset (&objfile
->static_psymbols
, 0,
1902 sizeof (objfile
->static_psymbols
));
1904 /* Free the obstacks for non-reusable objfiles */
1905 bcache_xfree (objfile
->psymbol_cache
);
1906 objfile
->psymbol_cache
= bcache_xmalloc ();
1907 bcache_xfree (objfile
->macro_cache
);
1908 objfile
->macro_cache
= bcache_xmalloc ();
1909 if (objfile
->demangled_names_hash
!= NULL
)
1911 htab_delete (objfile
->demangled_names_hash
);
1912 objfile
->demangled_names_hash
= NULL
;
1914 obstack_free (&objfile
->objfile_obstack
, 0);
1915 obstack_free (&objfile
->symbol_obstack
, 0);
1916 objfile
->sections
= NULL
;
1917 objfile
->symtabs
= NULL
;
1918 objfile
->psymtabs
= NULL
;
1919 objfile
->free_psymtabs
= NULL
;
1920 objfile
->cp_namespace_symtab
= NULL
;
1921 objfile
->msymbols
= NULL
;
1922 objfile
->sym_private
= NULL
;
1923 objfile
->minimal_symbol_count
= 0;
1924 memset (&objfile
->msymbol_hash
, 0,
1925 sizeof (objfile
->msymbol_hash
));
1926 memset (&objfile
->msymbol_demangled_hash
, 0,
1927 sizeof (objfile
->msymbol_demangled_hash
));
1928 objfile
->fundamental_types
= NULL
;
1929 clear_objfile_data (objfile
);
1930 if (objfile
->sf
!= NULL
)
1932 (*objfile
->sf
->sym_finish
) (objfile
);
1935 /* We never make this a mapped file. */
1937 /* obstack_specify_allocation also initializes the obstack so
1939 objfile
->psymbol_cache
= bcache_xmalloc ();
1940 objfile
->macro_cache
= bcache_xmalloc ();
1941 obstack_specify_allocation (&objfile
->objfile_obstack
, 0, 0,
1943 obstack_specify_allocation (&objfile
->symbol_obstack
, 0, 0,
1945 if (build_objfile_section_table (objfile
))
1947 error ("Can't find the file sections in `%s': %s",
1948 objfile
->name
, bfd_errmsg (bfd_get_error ()));
1950 terminate_minimal_symbol_table (objfile
);
1952 /* We use the same section offsets as from last time. I'm not
1953 sure whether that is always correct for shared libraries. */
1954 objfile
->section_offsets
= (struct section_offsets
*)
1955 obstack_alloc (&objfile
->objfile_obstack
,
1956 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
1957 memcpy (objfile
->section_offsets
, offsets
,
1958 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
1959 objfile
->num_sections
= num_offsets
;
1961 /* What the hell is sym_new_init for, anyway? The concept of
1962 distinguishing between the main file and additional files
1963 in this way seems rather dubious. */
1964 if (objfile
== symfile_objfile
)
1966 (*objfile
->sf
->sym_new_init
) (objfile
);
1968 RESET_HP_UX_GLOBALS ();
1972 (*objfile
->sf
->sym_init
) (objfile
);
1973 clear_complaints (&symfile_complaints
, 1, 1);
1974 /* The "mainline" parameter is a hideous hack; I think leaving it
1975 zero is OK since dbxread.c also does what it needs to do if
1976 objfile->global_psymbols.size is 0. */
1977 (*objfile
->sf
->sym_read
) (objfile
, 0);
1978 if (!have_partial_symbols () && !have_full_symbols ())
1981 printf_unfiltered ("(no debugging symbols found)\n");
1984 objfile
->flags
|= OBJF_SYMS
;
1986 /* We're done reading the symbol file; finish off complaints. */
1987 clear_complaints (&symfile_complaints
, 0, 1);
1989 /* Getting new symbols may change our opinion about what is
1992 reinit_frame_cache ();
1994 /* Discard cleanups as symbol reading was successful. */
1995 discard_cleanups (old_cleanups
);
1997 /* If the mtime has changed between the time we set new_modtime
1998 and now, we *want* this to be out of date, so don't call stat
2000 objfile
->mtime
= new_modtime
;
2002 reread_separate_symbols (objfile
);
2008 clear_symtab_users ();
2012 /* Handle separate debug info for OBJFILE, which has just been
2014 - If we had separate debug info before, but now we don't, get rid
2015 of the separated objfile.
2016 - If we didn't have separated debug info before, but now we do,
2017 read in the new separated debug info file.
2018 - If the debug link points to a different file, toss the old one
2019 and read the new one.
2020 This function does *not* handle the case where objfile is still
2021 using the same separate debug info file, but that file's timestamp
2022 has changed. That case should be handled by the loop in
2023 reread_symbols already. */
2025 reread_separate_symbols (struct objfile
*objfile
)
2028 unsigned long crc32
;
2030 /* Does the updated objfile's debug info live in a
2032 debug_file
= find_separate_debug_file (objfile
);
2034 if (objfile
->separate_debug_objfile
)
2036 /* There are two cases where we need to get rid of
2037 the old separated debug info objfile:
2038 - if the new primary objfile doesn't have
2039 separated debug info, or
2040 - if the new primary objfile has separate debug
2041 info, but it's under a different filename.
2043 If the old and new objfiles both have separate
2044 debug info, under the same filename, then we're
2045 okay --- if the separated file's contents have
2046 changed, we will have caught that when we
2047 visited it in this function's outermost
2050 || strcmp (debug_file
, objfile
->separate_debug_objfile
->name
) != 0)
2051 free_objfile (objfile
->separate_debug_objfile
);
2054 /* If the new objfile has separate debug info, and we
2055 haven't loaded it already, do so now. */
2057 && ! objfile
->separate_debug_objfile
)
2059 /* Use the same section offset table as objfile itself.
2060 Preserve the flags from objfile that make sense. */
2061 objfile
->separate_debug_objfile
2062 = (symbol_file_add_with_addrs_or_offsets
2064 info_verbose
, /* from_tty: Don't override the default. */
2065 0, /* No addr table. */
2066 objfile
->section_offsets
, objfile
->num_sections
,
2067 0, /* Not mainline. See comments about this above. */
2068 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
2069 | OBJF_USERLOADED
)));
2070 objfile
->separate_debug_objfile
->separate_debug_objfile_backlink
2086 static filename_language
*filename_language_table
;
2087 static int fl_table_size
, fl_table_next
;
2090 add_filename_language (char *ext
, enum language lang
)
2092 if (fl_table_next
>= fl_table_size
)
2094 fl_table_size
+= 10;
2095 filename_language_table
=
2096 xrealloc (filename_language_table
,
2097 fl_table_size
* sizeof (*filename_language_table
));
2100 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2101 filename_language_table
[fl_table_next
].lang
= lang
;
2105 static char *ext_args
;
2108 set_ext_lang_command (char *args
, int from_tty
)
2111 char *cp
= ext_args
;
2114 /* First arg is filename extension, starting with '.' */
2116 error ("'%s': Filename extension must begin with '.'", ext_args
);
2118 /* Find end of first arg. */
2119 while (*cp
&& !isspace (*cp
))
2123 error ("'%s': two arguments required -- filename extension and language",
2126 /* Null-terminate first arg */
2129 /* Find beginning of second arg, which should be a source language. */
2130 while (*cp
&& isspace (*cp
))
2134 error ("'%s': two arguments required -- filename extension and language",
2137 /* Lookup the language from among those we know. */
2138 lang
= language_enum (cp
);
2140 /* Now lookup the filename extension: do we already know it? */
2141 for (i
= 0; i
< fl_table_next
; i
++)
2142 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2145 if (i
>= fl_table_next
)
2147 /* new file extension */
2148 add_filename_language (ext_args
, lang
);
2152 /* redefining a previously known filename extension */
2155 /* query ("Really make files of type %s '%s'?", */
2156 /* ext_args, language_str (lang)); */
2158 xfree (filename_language_table
[i
].ext
);
2159 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2160 filename_language_table
[i
].lang
= lang
;
2165 info_ext_lang_command (char *args
, int from_tty
)
2169 printf_filtered ("Filename extensions and the languages they represent:");
2170 printf_filtered ("\n\n");
2171 for (i
= 0; i
< fl_table_next
; i
++)
2172 printf_filtered ("\t%s\t- %s\n",
2173 filename_language_table
[i
].ext
,
2174 language_str (filename_language_table
[i
].lang
));
2178 init_filename_language_table (void)
2180 if (fl_table_size
== 0) /* protect against repetition */
2184 filename_language_table
=
2185 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
2186 add_filename_language (".c", language_c
);
2187 add_filename_language (".C", language_cplus
);
2188 add_filename_language (".cc", language_cplus
);
2189 add_filename_language (".cp", language_cplus
);
2190 add_filename_language (".cpp", language_cplus
);
2191 add_filename_language (".cxx", language_cplus
);
2192 add_filename_language (".c++", language_cplus
);
2193 add_filename_language (".java", language_java
);
2194 add_filename_language (".class", language_java
);
2195 add_filename_language (".m", language_objc
);
2196 add_filename_language (".f", language_fortran
);
2197 add_filename_language (".F", language_fortran
);
2198 add_filename_language (".s", language_asm
);
2199 add_filename_language (".S", language_asm
);
2200 add_filename_language (".pas", language_pascal
);
2201 add_filename_language (".p", language_pascal
);
2202 add_filename_language (".pp", language_pascal
);
2207 deduce_language_from_filename (char *filename
)
2212 if (filename
!= NULL
)
2213 if ((cp
= strrchr (filename
, '.')) != NULL
)
2214 for (i
= 0; i
< fl_table_next
; i
++)
2215 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2216 return filename_language_table
[i
].lang
;
2218 return language_unknown
;
2223 Allocate and partly initialize a new symbol table. Return a pointer
2224 to it. error() if no space.
2226 Caller must set these fields:
2232 possibly free_named_symtabs (symtab->filename);
2236 allocate_symtab (char *filename
, struct objfile
*objfile
)
2238 struct symtab
*symtab
;
2240 symtab
= (struct symtab
*)
2241 obstack_alloc (&objfile
->symbol_obstack
, sizeof (struct symtab
));
2242 memset (symtab
, 0, sizeof (*symtab
));
2243 symtab
->filename
= obsavestring (filename
, strlen (filename
),
2244 &objfile
->symbol_obstack
);
2245 symtab
->fullname
= NULL
;
2246 symtab
->language
= deduce_language_from_filename (filename
);
2247 symtab
->debugformat
= obsavestring ("unknown", 7,
2248 &objfile
->symbol_obstack
);
2250 /* Hook it to the objfile it comes from */
2252 symtab
->objfile
= objfile
;
2253 symtab
->next
= objfile
->symtabs
;
2254 objfile
->symtabs
= symtab
;
2256 /* FIXME: This should go away. It is only defined for the Z8000,
2257 and the Z8000 definition of this macro doesn't have anything to
2258 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
2259 here for convenience. */
2260 #ifdef INIT_EXTRA_SYMTAB_INFO
2261 INIT_EXTRA_SYMTAB_INFO (symtab
);
2267 struct partial_symtab
*
2268 allocate_psymtab (char *filename
, struct objfile
*objfile
)
2270 struct partial_symtab
*psymtab
;
2272 if (objfile
->free_psymtabs
)
2274 psymtab
= objfile
->free_psymtabs
;
2275 objfile
->free_psymtabs
= psymtab
->next
;
2278 psymtab
= (struct partial_symtab
*)
2279 obstack_alloc (&objfile
->objfile_obstack
,
2280 sizeof (struct partial_symtab
));
2282 memset (psymtab
, 0, sizeof (struct partial_symtab
));
2283 psymtab
->filename
= obsavestring (filename
, strlen (filename
),
2284 &objfile
->objfile_obstack
);
2285 psymtab
->symtab
= NULL
;
2287 /* Prepend it to the psymtab list for the objfile it belongs to.
2288 Psymtabs are searched in most recent inserted -> least recent
2291 psymtab
->objfile
= objfile
;
2292 psymtab
->next
= objfile
->psymtabs
;
2293 objfile
->psymtabs
= psymtab
;
2296 struct partial_symtab
**prev_pst
;
2297 psymtab
->objfile
= objfile
;
2298 psymtab
->next
= NULL
;
2299 prev_pst
= &(objfile
->psymtabs
);
2300 while ((*prev_pst
) != NULL
)
2301 prev_pst
= &((*prev_pst
)->next
);
2302 (*prev_pst
) = psymtab
;
2310 discard_psymtab (struct partial_symtab
*pst
)
2312 struct partial_symtab
**prev_pst
;
2315 Empty psymtabs happen as a result of header files which don't
2316 have any symbols in them. There can be a lot of them. But this
2317 check is wrong, in that a psymtab with N_SLINE entries but
2318 nothing else is not empty, but we don't realize that. Fixing
2319 that without slowing things down might be tricky. */
2321 /* First, snip it out of the psymtab chain */
2323 prev_pst
= &(pst
->objfile
->psymtabs
);
2324 while ((*prev_pst
) != pst
)
2325 prev_pst
= &((*prev_pst
)->next
);
2326 (*prev_pst
) = pst
->next
;
2328 /* Next, put it on a free list for recycling */
2330 pst
->next
= pst
->objfile
->free_psymtabs
;
2331 pst
->objfile
->free_psymtabs
= pst
;
2335 /* Reset all data structures in gdb which may contain references to symbol
2339 clear_symtab_users (void)
2341 /* Someday, we should do better than this, by only blowing away
2342 the things that really need to be blown. */
2343 clear_value_history ();
2345 clear_internalvars ();
2346 breakpoint_re_set ();
2347 set_default_breakpoint (0, 0, 0, 0);
2348 clear_current_source_symtab_and_line ();
2349 clear_pc_function_cache ();
2350 if (target_new_objfile_hook
)
2351 target_new_objfile_hook (NULL
);
2355 clear_symtab_users_cleanup (void *ignore
)
2357 clear_symtab_users ();
2360 /* clear_symtab_users_once:
2362 This function is run after symbol reading, or from a cleanup.
2363 If an old symbol table was obsoleted, the old symbol table
2364 has been blown away, but the other GDB data structures that may
2365 reference it have not yet been cleared or re-directed. (The old
2366 symtab was zapped, and the cleanup queued, in free_named_symtab()
2369 This function can be queued N times as a cleanup, or called
2370 directly; it will do all the work the first time, and then will be a
2371 no-op until the next time it is queued. This works by bumping a
2372 counter at queueing time. Much later when the cleanup is run, or at
2373 the end of symbol processing (in case the cleanup is discarded), if
2374 the queued count is greater than the "done-count", we do the work
2375 and set the done-count to the queued count. If the queued count is
2376 less than or equal to the done-count, we just ignore the call. This
2377 is needed because reading a single .o file will often replace many
2378 symtabs (one per .h file, for example), and we don't want to reset
2379 the breakpoints N times in the user's face.
2381 The reason we both queue a cleanup, and call it directly after symbol
2382 reading, is because the cleanup protects us in case of errors, but is
2383 discarded if symbol reading is successful. */
2386 /* FIXME: As free_named_symtabs is currently a big noop this function
2387 is no longer needed. */
2388 static void clear_symtab_users_once (void);
2390 static int clear_symtab_users_queued
;
2391 static int clear_symtab_users_done
;
2394 clear_symtab_users_once (void)
2396 /* Enforce once-per-`do_cleanups'-semantics */
2397 if (clear_symtab_users_queued
<= clear_symtab_users_done
)
2399 clear_symtab_users_done
= clear_symtab_users_queued
;
2401 clear_symtab_users ();
2405 /* Delete the specified psymtab, and any others that reference it. */
2408 cashier_psymtab (struct partial_symtab
*pst
)
2410 struct partial_symtab
*ps
, *pprev
= NULL
;
2413 /* Find its previous psymtab in the chain */
2414 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2423 /* Unhook it from the chain. */
2424 if (ps
== pst
->objfile
->psymtabs
)
2425 pst
->objfile
->psymtabs
= ps
->next
;
2427 pprev
->next
= ps
->next
;
2429 /* FIXME, we can't conveniently deallocate the entries in the
2430 partial_symbol lists (global_psymbols/static_psymbols) that
2431 this psymtab points to. These just take up space until all
2432 the psymtabs are reclaimed. Ditto the dependencies list and
2433 filename, which are all in the objfile_obstack. */
2435 /* We need to cashier any psymtab that has this one as a dependency... */
2437 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2439 for (i
= 0; i
< ps
->number_of_dependencies
; i
++)
2441 if (ps
->dependencies
[i
] == pst
)
2443 cashier_psymtab (ps
);
2444 goto again
; /* Must restart, chain has been munged. */
2451 /* If a symtab or psymtab for filename NAME is found, free it along
2452 with any dependent breakpoints, displays, etc.
2453 Used when loading new versions of object modules with the "add-file"
2454 command. This is only called on the top-level symtab or psymtab's name;
2455 it is not called for subsidiary files such as .h files.
2457 Return value is 1 if we blew away the environment, 0 if not.
2458 FIXME. The return value appears to never be used.
2460 FIXME. I think this is not the best way to do this. We should
2461 work on being gentler to the environment while still cleaning up
2462 all stray pointers into the freed symtab. */
2465 free_named_symtabs (char *name
)
2468 /* FIXME: With the new method of each objfile having it's own
2469 psymtab list, this function needs serious rethinking. In particular,
2470 why was it ever necessary to toss psymtabs with specific compilation
2471 unit filenames, as opposed to all psymtabs from a particular symbol
2473 Well, the answer is that some systems permit reloading of particular
2474 compilation units. We want to blow away any old info about these
2475 compilation units, regardless of which objfiles they arrived in. --gnu. */
2478 struct symtab
*prev
;
2479 struct partial_symtab
*ps
;
2480 struct blockvector
*bv
;
2483 /* We only wack things if the symbol-reload switch is set. */
2484 if (!symbol_reloading
)
2487 /* Some symbol formats have trouble providing file names... */
2488 if (name
== 0 || *name
== '\0')
2491 /* Look for a psymtab with the specified name. */
2494 for (ps
= partial_symtab_list
; ps
; ps
= ps
->next
)
2496 if (strcmp (name
, ps
->filename
) == 0)
2498 cashier_psymtab (ps
); /* Blow it away...and its little dog, too. */
2499 goto again2
; /* Must restart, chain has been munged */
2503 /* Look for a symtab with the specified name. */
2505 for (s
= symtab_list
; s
; s
= s
->next
)
2507 if (strcmp (name
, s
->filename
) == 0)
2514 if (s
== symtab_list
)
2515 symtab_list
= s
->next
;
2517 prev
->next
= s
->next
;
2519 /* For now, queue a delete for all breakpoints, displays, etc., whether
2520 or not they depend on the symtab being freed. This should be
2521 changed so that only those data structures affected are deleted. */
2523 /* But don't delete anything if the symtab is empty.
2524 This test is necessary due to a bug in "dbxread.c" that
2525 causes empty symtabs to be created for N_SO symbols that
2526 contain the pathname of the object file. (This problem
2527 has been fixed in GDB 3.9x). */
2529 bv
= BLOCKVECTOR (s
);
2530 if (BLOCKVECTOR_NBLOCKS (bv
) > 2
2531 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
))
2532 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)))
2534 complaint (&symfile_complaints
, "Replacing old symbols for `%s'",
2536 clear_symtab_users_queued
++;
2537 make_cleanup (clear_symtab_users_once
, 0);
2542 complaint (&symfile_complaints
, "Empty symbol table found for `%s'",
2550 /* It is still possible that some breakpoints will be affected
2551 even though no symtab was found, since the file might have
2552 been compiled without debugging, and hence not be associated
2553 with a symtab. In order to handle this correctly, we would need
2554 to keep a list of text address ranges for undebuggable files.
2555 For now, we do nothing, since this is a fairly obscure case. */
2559 /* FIXME, what about the minimal symbol table? */
2566 /* Allocate and partially fill a partial symtab. It will be
2567 completely filled at the end of the symbol list.
2569 FILENAME is the name of the symbol-file we are reading from. */
2571 struct partial_symtab
*
2572 start_psymtab_common (struct objfile
*objfile
,
2573 struct section_offsets
*section_offsets
, char *filename
,
2574 CORE_ADDR textlow
, struct partial_symbol
**global_syms
,
2575 struct partial_symbol
**static_syms
)
2577 struct partial_symtab
*psymtab
;
2579 psymtab
= allocate_psymtab (filename
, objfile
);
2580 psymtab
->section_offsets
= section_offsets
;
2581 psymtab
->textlow
= textlow
;
2582 psymtab
->texthigh
= psymtab
->textlow
; /* default */
2583 psymtab
->globals_offset
= global_syms
- objfile
->global_psymbols
.list
;
2584 psymtab
->statics_offset
= static_syms
- objfile
->static_psymbols
.list
;
2588 /* Add a symbol with a long value to a psymtab.
2589 Since one arg is a struct, we pass in a ptr and deref it (sigh).
2590 Return the partial symbol that has been added. */
2592 /* NOTE: carlton/2003-09-11: The reason why we return the partial
2593 symbol is so that callers can get access to the symbol's demangled
2594 name, which they don't have any cheap way to determine otherwise.
2595 (Currenly, dwarf2read.c is the only file who uses that information,
2596 though it's possible that other readers might in the future.)
2597 Elena wasn't thrilled about that, and I don't blame her, but we
2598 couldn't come up with a better way to get that information. If
2599 it's needed in other situations, we could consider breaking up
2600 SYMBOL_SET_NAMES to provide access to the demangled name lookup
2603 const struct partial_symbol
*
2604 add_psymbol_to_list (char *name
, int namelength
, domain_enum domain
,
2605 enum address_class
class,
2606 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2607 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2608 enum language language
, struct objfile
*objfile
)
2610 struct partial_symbol
*psym
;
2611 char *buf
= alloca (namelength
+ 1);
2612 /* psymbol is static so that there will be no uninitialized gaps in the
2613 structure which might contain random data, causing cache misses in
2615 static struct partial_symbol psymbol
;
2617 /* Create local copy of the partial symbol */
2618 memcpy (buf
, name
, namelength
);
2619 buf
[namelength
] = '\0';
2620 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2623 SYMBOL_VALUE (&psymbol
) = val
;
2627 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2629 SYMBOL_SECTION (&psymbol
) = 0;
2630 SYMBOL_LANGUAGE (&psymbol
) = language
;
2631 PSYMBOL_DOMAIN (&psymbol
) = domain
;
2632 PSYMBOL_CLASS (&psymbol
) = class;
2634 SYMBOL_SET_NAMES (&psymbol
, buf
, namelength
, objfile
);
2636 /* Stash the partial symbol away in the cache */
2637 psym
= deprecated_bcache (&psymbol
, sizeof (struct partial_symbol
),
2638 objfile
->psymbol_cache
);
2640 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2641 if (list
->next
>= list
->list
+ list
->size
)
2643 extend_psymbol_list (list
, objfile
);
2645 *list
->next
++ = psym
;
2646 OBJSTAT (objfile
, n_psyms
++);
2651 /* Add a symbol with a long value to a psymtab. This differs from
2652 * add_psymbol_to_list above in taking both a mangled and a demangled
2656 add_psymbol_with_dem_name_to_list (char *name
, int namelength
, char *dem_name
,
2657 int dem_namelength
, domain_enum domain
,
2658 enum address_class
class,
2659 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2660 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2661 enum language language
,
2662 struct objfile
*objfile
)
2664 struct partial_symbol
*psym
;
2665 char *buf
= alloca (namelength
+ 1);
2666 /* psymbol is static so that there will be no uninitialized gaps in the
2667 structure which might contain random data, causing cache misses in
2669 static struct partial_symbol psymbol
;
2671 /* Create local copy of the partial symbol */
2673 memcpy (buf
, name
, namelength
);
2674 buf
[namelength
] = '\0';
2675 DEPRECATED_SYMBOL_NAME (&psymbol
) = deprecated_bcache (buf
, namelength
+ 1,
2676 objfile
->psymbol_cache
);
2678 buf
= alloca (dem_namelength
+ 1);
2679 memcpy (buf
, dem_name
, dem_namelength
);
2680 buf
[dem_namelength
] = '\0';
2685 case language_cplus
:
2686 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol
) =
2687 deprecated_bcache (buf
, dem_namelength
+ 1, objfile
->psymbol_cache
);
2689 /* FIXME What should be done for the default case? Ignoring for now. */
2692 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2695 SYMBOL_VALUE (&psymbol
) = val
;
2699 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2701 SYMBOL_SECTION (&psymbol
) = 0;
2702 SYMBOL_LANGUAGE (&psymbol
) = language
;
2703 PSYMBOL_DOMAIN (&psymbol
) = domain
;
2704 PSYMBOL_CLASS (&psymbol
) = class;
2705 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2707 /* Stash the partial symbol away in the cache */
2708 psym
= deprecated_bcache (&psymbol
, sizeof (struct partial_symbol
),
2709 objfile
->psymbol_cache
);
2711 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2712 if (list
->next
>= list
->list
+ list
->size
)
2714 extend_psymbol_list (list
, objfile
);
2716 *list
->next
++ = psym
;
2717 OBJSTAT (objfile
, n_psyms
++);
2720 /* Initialize storage for partial symbols. */
2723 init_psymbol_list (struct objfile
*objfile
, int total_symbols
)
2725 /* Free any previously allocated psymbol lists. */
2727 if (objfile
->global_psymbols
.list
)
2729 xmfree (objfile
->md
, objfile
->global_psymbols
.list
);
2731 if (objfile
->static_psymbols
.list
)
2733 xmfree (objfile
->md
, objfile
->static_psymbols
.list
);
2736 /* Current best guess is that approximately a twentieth
2737 of the total symbols (in a debugging file) are global or static
2740 objfile
->global_psymbols
.size
= total_symbols
/ 10;
2741 objfile
->static_psymbols
.size
= total_symbols
/ 10;
2743 if (objfile
->global_psymbols
.size
> 0)
2745 objfile
->global_psymbols
.next
=
2746 objfile
->global_psymbols
.list
= (struct partial_symbol
**)
2747 xmmalloc (objfile
->md
, (objfile
->global_psymbols
.size
2748 * sizeof (struct partial_symbol
*)));
2750 if (objfile
->static_psymbols
.size
> 0)
2752 objfile
->static_psymbols
.next
=
2753 objfile
->static_psymbols
.list
= (struct partial_symbol
**)
2754 xmmalloc (objfile
->md
, (objfile
->static_psymbols
.size
2755 * sizeof (struct partial_symbol
*)));
2760 The following code implements an abstraction for debugging overlay sections.
2762 The target model is as follows:
2763 1) The gnu linker will permit multiple sections to be mapped into the
2764 same VMA, each with its own unique LMA (or load address).
2765 2) It is assumed that some runtime mechanism exists for mapping the
2766 sections, one by one, from the load address into the VMA address.
2767 3) This code provides a mechanism for gdb to keep track of which
2768 sections should be considered to be mapped from the VMA to the LMA.
2769 This information is used for symbol lookup, and memory read/write.
2770 For instance, if a section has been mapped then its contents
2771 should be read from the VMA, otherwise from the LMA.
2773 Two levels of debugger support for overlays are available. One is
2774 "manual", in which the debugger relies on the user to tell it which
2775 overlays are currently mapped. This level of support is
2776 implemented entirely in the core debugger, and the information about
2777 whether a section is mapped is kept in the objfile->obj_section table.
2779 The second level of support is "automatic", and is only available if
2780 the target-specific code provides functionality to read the target's
2781 overlay mapping table, and translate its contents for the debugger
2782 (by updating the mapped state information in the obj_section tables).
2784 The interface is as follows:
2786 overlay map <name> -- tell gdb to consider this section mapped
2787 overlay unmap <name> -- tell gdb to consider this section unmapped
2788 overlay list -- list the sections that GDB thinks are mapped
2789 overlay read-target -- get the target's state of what's mapped
2790 overlay off/manual/auto -- set overlay debugging state
2791 Functional interface:
2792 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2793 section, return that section.
2794 find_pc_overlay(pc): find any overlay section that contains
2795 the pc, either in its VMA or its LMA
2796 overlay_is_mapped(sect): true if overlay is marked as mapped
2797 section_is_overlay(sect): true if section's VMA != LMA
2798 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2799 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2800 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2801 overlay_mapped_address(...): map an address from section's LMA to VMA
2802 overlay_unmapped_address(...): map an address from section's VMA to LMA
2803 symbol_overlayed_address(...): Return a "current" address for symbol:
2804 either in VMA or LMA depending on whether
2805 the symbol's section is currently mapped
2808 /* Overlay debugging state: */
2810 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2811 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
2813 /* Target vector for refreshing overlay mapped state */
2814 static void simple_overlay_update (struct obj_section
*);
2815 void (*target_overlay_update
) (struct obj_section
*) = simple_overlay_update
;
2817 /* Function: section_is_overlay (SECTION)
2818 Returns true if SECTION has VMA not equal to LMA, ie.
2819 SECTION is loaded at an address different from where it will "run". */
2822 section_is_overlay (asection
*section
)
2824 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2826 if (overlay_debugging
)
2827 if (section
&& section
->lma
!= 0 &&
2828 section
->vma
!= section
->lma
)
2834 /* Function: overlay_invalidate_all (void)
2835 Invalidate the mapped state of all overlay sections (mark it as stale). */
2838 overlay_invalidate_all (void)
2840 struct objfile
*objfile
;
2841 struct obj_section
*sect
;
2843 ALL_OBJSECTIONS (objfile
, sect
)
2844 if (section_is_overlay (sect
->the_bfd_section
))
2845 sect
->ovly_mapped
= -1;
2848 /* Function: overlay_is_mapped (SECTION)
2849 Returns true if section is an overlay, and is currently mapped.
2850 Private: public access is thru function section_is_mapped.
2852 Access to the ovly_mapped flag is restricted to this function, so
2853 that we can do automatic update. If the global flag
2854 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2855 overlay_invalidate_all. If the mapped state of the particular
2856 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2859 overlay_is_mapped (struct obj_section
*osect
)
2861 if (osect
== 0 || !section_is_overlay (osect
->the_bfd_section
))
2864 switch (overlay_debugging
)
2868 return 0; /* overlay debugging off */
2869 case ovly_auto
: /* overlay debugging automatic */
2870 /* Unles there is a target_overlay_update function,
2871 there's really nothing useful to do here (can't really go auto) */
2872 if (target_overlay_update
)
2874 if (overlay_cache_invalid
)
2876 overlay_invalidate_all ();
2877 overlay_cache_invalid
= 0;
2879 if (osect
->ovly_mapped
== -1)
2880 (*target_overlay_update
) (osect
);
2882 /* fall thru to manual case */
2883 case ovly_on
: /* overlay debugging manual */
2884 return osect
->ovly_mapped
== 1;
2888 /* Function: section_is_mapped
2889 Returns true if section is an overlay, and is currently mapped. */
2892 section_is_mapped (asection
*section
)
2894 struct objfile
*objfile
;
2895 struct obj_section
*osect
;
2897 if (overlay_debugging
)
2898 if (section
&& section_is_overlay (section
))
2899 ALL_OBJSECTIONS (objfile
, osect
)
2900 if (osect
->the_bfd_section
== section
)
2901 return overlay_is_mapped (osect
);
2906 /* Function: pc_in_unmapped_range
2907 If PC falls into the lma range of SECTION, return true, else false. */
2910 pc_in_unmapped_range (CORE_ADDR pc
, asection
*section
)
2912 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2916 if (overlay_debugging
)
2917 if (section
&& section_is_overlay (section
))
2919 size
= bfd_get_section_size_before_reloc (section
);
2920 if (section
->lma
<= pc
&& pc
< section
->lma
+ size
)
2926 /* Function: pc_in_mapped_range
2927 If PC falls into the vma range of SECTION, return true, else false. */
2930 pc_in_mapped_range (CORE_ADDR pc
, asection
*section
)
2932 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2936 if (overlay_debugging
)
2937 if (section
&& section_is_overlay (section
))
2939 size
= bfd_get_section_size_before_reloc (section
);
2940 if (section
->vma
<= pc
&& pc
< section
->vma
+ size
)
2947 /* Return true if the mapped ranges of sections A and B overlap, false
2950 sections_overlap (asection
*a
, asection
*b
)
2952 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2954 CORE_ADDR a_start
= a
->vma
;
2955 CORE_ADDR a_end
= a
->vma
+ bfd_get_section_size_before_reloc (a
);
2956 CORE_ADDR b_start
= b
->vma
;
2957 CORE_ADDR b_end
= b
->vma
+ bfd_get_section_size_before_reloc (b
);
2959 return (a_start
< b_end
&& b_start
< a_end
);
2962 /* Function: overlay_unmapped_address (PC, SECTION)
2963 Returns the address corresponding to PC in the unmapped (load) range.
2964 May be the same as PC. */
2967 overlay_unmapped_address (CORE_ADDR pc
, asection
*section
)
2969 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2971 if (overlay_debugging
)
2972 if (section
&& section_is_overlay (section
) &&
2973 pc_in_mapped_range (pc
, section
))
2974 return pc
+ section
->lma
- section
->vma
;
2979 /* Function: overlay_mapped_address (PC, SECTION)
2980 Returns the address corresponding to PC in the mapped (runtime) range.
2981 May be the same as PC. */
2984 overlay_mapped_address (CORE_ADDR pc
, asection
*section
)
2986 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2988 if (overlay_debugging
)
2989 if (section
&& section_is_overlay (section
) &&
2990 pc_in_unmapped_range (pc
, section
))
2991 return pc
+ section
->vma
- section
->lma
;
2997 /* Function: symbol_overlayed_address
2998 Return one of two addresses (relative to the VMA or to the LMA),
2999 depending on whether the section is mapped or not. */
3002 symbol_overlayed_address (CORE_ADDR address
, asection
*section
)
3004 if (overlay_debugging
)
3006 /* If the symbol has no section, just return its regular address. */
3009 /* If the symbol's section is not an overlay, just return its address */
3010 if (!section_is_overlay (section
))
3012 /* If the symbol's section is mapped, just return its address */
3013 if (section_is_mapped (section
))
3016 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3017 * then return its LOADED address rather than its vma address!!
3019 return overlay_unmapped_address (address
, section
);
3024 /* Function: find_pc_overlay (PC)
3025 Return the best-match overlay section for PC:
3026 If PC matches a mapped overlay section's VMA, return that section.
3027 Else if PC matches an unmapped section's VMA, return that section.
3028 Else if PC matches an unmapped section's LMA, return that section. */
3031 find_pc_overlay (CORE_ADDR pc
)
3033 struct objfile
*objfile
;
3034 struct obj_section
*osect
, *best_match
= NULL
;
3036 if (overlay_debugging
)
3037 ALL_OBJSECTIONS (objfile
, osect
)
3038 if (section_is_overlay (osect
->the_bfd_section
))
3040 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
))
3042 if (overlay_is_mapped (osect
))
3043 return osect
->the_bfd_section
;
3047 else if (pc_in_unmapped_range (pc
, osect
->the_bfd_section
))
3050 return best_match
? best_match
->the_bfd_section
: NULL
;
3053 /* Function: find_pc_mapped_section (PC)
3054 If PC falls into the VMA address range of an overlay section that is
3055 currently marked as MAPPED, return that section. Else return NULL. */
3058 find_pc_mapped_section (CORE_ADDR pc
)
3060 struct objfile
*objfile
;
3061 struct obj_section
*osect
;
3063 if (overlay_debugging
)
3064 ALL_OBJSECTIONS (objfile
, osect
)
3065 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
) &&
3066 overlay_is_mapped (osect
))
3067 return osect
->the_bfd_section
;
3072 /* Function: list_overlays_command
3073 Print a list of mapped sections and their PC ranges */
3076 list_overlays_command (char *args
, int from_tty
)
3079 struct objfile
*objfile
;
3080 struct obj_section
*osect
;
3082 if (overlay_debugging
)
3083 ALL_OBJSECTIONS (objfile
, osect
)
3084 if (overlay_is_mapped (osect
))
3090 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3091 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3092 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3093 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3095 printf_filtered ("Section %s, loaded at ", name
);
3096 print_address_numeric (lma
, 1, gdb_stdout
);
3097 puts_filtered (" - ");
3098 print_address_numeric (lma
+ size
, 1, gdb_stdout
);
3099 printf_filtered (", mapped at ");
3100 print_address_numeric (vma
, 1, gdb_stdout
);
3101 puts_filtered (" - ");
3102 print_address_numeric (vma
+ size
, 1, gdb_stdout
);
3103 puts_filtered ("\n");
3108 printf_filtered ("No sections are mapped.\n");
3111 /* Function: map_overlay_command
3112 Mark the named section as mapped (ie. residing at its VMA address). */
3115 map_overlay_command (char *args
, int from_tty
)
3117 struct objfile
*objfile
, *objfile2
;
3118 struct obj_section
*sec
, *sec2
;
3121 if (!overlay_debugging
)
3123 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3124 the 'overlay manual' command.");
3126 if (args
== 0 || *args
== 0)
3127 error ("Argument required: name of an overlay section");
3129 /* First, find a section matching the user supplied argument */
3130 ALL_OBJSECTIONS (objfile
, sec
)
3131 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3133 /* Now, check to see if the section is an overlay. */
3134 bfdsec
= sec
->the_bfd_section
;
3135 if (!section_is_overlay (bfdsec
))
3136 continue; /* not an overlay section */
3138 /* Mark the overlay as "mapped" */
3139 sec
->ovly_mapped
= 1;
3141 /* Next, make a pass and unmap any sections that are
3142 overlapped by this new section: */
3143 ALL_OBJSECTIONS (objfile2
, sec2
)
3144 if (sec2
->ovly_mapped
3146 && sec
->the_bfd_section
!= sec2
->the_bfd_section
3147 && sections_overlap (sec
->the_bfd_section
,
3148 sec2
->the_bfd_section
))
3151 printf_unfiltered ("Note: section %s unmapped by overlap\n",
3152 bfd_section_name (objfile
->obfd
,
3153 sec2
->the_bfd_section
));
3154 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
3158 error ("No overlay section called %s", args
);
3161 /* Function: unmap_overlay_command
3162 Mark the overlay section as unmapped
3163 (ie. resident in its LMA address range, rather than the VMA range). */
3166 unmap_overlay_command (char *args
, int from_tty
)
3168 struct objfile
*objfile
;
3169 struct obj_section
*sec
;
3171 if (!overlay_debugging
)
3173 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3174 the 'overlay manual' command.");
3176 if (args
== 0 || *args
== 0)
3177 error ("Argument required: name of an overlay section");
3179 /* First, find a section matching the user supplied argument */
3180 ALL_OBJSECTIONS (objfile
, sec
)
3181 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3183 if (!sec
->ovly_mapped
)
3184 error ("Section %s is not mapped", args
);
3185 sec
->ovly_mapped
= 0;
3188 error ("No overlay section called %s", args
);
3191 /* Function: overlay_auto_command
3192 A utility command to turn on overlay debugging.
3193 Possibly this should be done via a set/show command. */
3196 overlay_auto_command (char *args
, int from_tty
)
3198 overlay_debugging
= ovly_auto
;
3199 enable_overlay_breakpoints ();
3201 printf_unfiltered ("Automatic overlay debugging enabled.");
3204 /* Function: overlay_manual_command
3205 A utility command to turn on overlay debugging.
3206 Possibly this should be done via a set/show command. */
3209 overlay_manual_command (char *args
, int from_tty
)
3211 overlay_debugging
= ovly_on
;
3212 disable_overlay_breakpoints ();
3214 printf_unfiltered ("Overlay debugging enabled.");
3217 /* Function: overlay_off_command
3218 A utility command to turn on overlay debugging.
3219 Possibly this should be done via a set/show command. */
3222 overlay_off_command (char *args
, int from_tty
)
3224 overlay_debugging
= ovly_off
;
3225 disable_overlay_breakpoints ();
3227 printf_unfiltered ("Overlay debugging disabled.");
3231 overlay_load_command (char *args
, int from_tty
)
3233 if (target_overlay_update
)
3234 (*target_overlay_update
) (NULL
);
3236 error ("This target does not know how to read its overlay state.");
3239 /* Function: overlay_command
3240 A place-holder for a mis-typed command */
3242 /* Command list chain containing all defined "overlay" subcommands. */
3243 struct cmd_list_element
*overlaylist
;
3246 overlay_command (char *args
, int from_tty
)
3249 ("\"overlay\" must be followed by the name of an overlay command.\n");
3250 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3254 /* Target Overlays for the "Simplest" overlay manager:
3256 This is GDB's default target overlay layer. It works with the
3257 minimal overlay manager supplied as an example by Cygnus. The
3258 entry point is via a function pointer "target_overlay_update",
3259 so targets that use a different runtime overlay manager can
3260 substitute their own overlay_update function and take over the
3263 The overlay_update function pokes around in the target's data structures
3264 to see what overlays are mapped, and updates GDB's overlay mapping with
3267 In this simple implementation, the target data structures are as follows:
3268 unsigned _novlys; /# number of overlay sections #/
3269 unsigned _ovly_table[_novlys][4] = {
3270 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3271 {..., ..., ..., ...},
3273 unsigned _novly_regions; /# number of overlay regions #/
3274 unsigned _ovly_region_table[_novly_regions][3] = {
3275 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3278 These functions will attempt to update GDB's mappedness state in the
3279 symbol section table, based on the target's mappedness state.
3281 To do this, we keep a cached copy of the target's _ovly_table, and
3282 attempt to detect when the cached copy is invalidated. The main
3283 entry point is "simple_overlay_update(SECT), which looks up SECT in
3284 the cached table and re-reads only the entry for that section from
3285 the target (whenever possible).
3288 /* Cached, dynamically allocated copies of the target data structures: */
3289 static unsigned (*cache_ovly_table
)[4] = 0;
3291 static unsigned (*cache_ovly_region_table
)[3] = 0;
3293 static unsigned cache_novlys
= 0;
3295 static unsigned cache_novly_regions
= 0;
3297 static CORE_ADDR cache_ovly_table_base
= 0;
3299 static CORE_ADDR cache_ovly_region_table_base
= 0;
3303 VMA
, SIZE
, LMA
, MAPPED
3305 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
3307 /* Throw away the cached copy of _ovly_table */
3309 simple_free_overlay_table (void)
3311 if (cache_ovly_table
)
3312 xfree (cache_ovly_table
);
3314 cache_ovly_table
= NULL
;
3315 cache_ovly_table_base
= 0;
3319 /* Throw away the cached copy of _ovly_region_table */
3321 simple_free_overlay_region_table (void)
3323 if (cache_ovly_region_table
)
3324 xfree (cache_ovly_region_table
);
3325 cache_novly_regions
= 0;
3326 cache_ovly_region_table
= NULL
;
3327 cache_ovly_region_table_base
= 0;
3331 /* Read an array of ints from the target into a local buffer.
3332 Convert to host order. int LEN is number of ints */
3334 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
, int len
)
3336 /* FIXME (alloca): Not safe if array is very large. */
3337 char *buf
= alloca (len
* TARGET_LONG_BYTES
);
3340 read_memory (memaddr
, buf
, len
* TARGET_LONG_BYTES
);
3341 for (i
= 0; i
< len
; i
++)
3342 myaddr
[i
] = extract_unsigned_integer (TARGET_LONG_BYTES
* i
+ buf
,
3346 /* Find and grab a copy of the target _ovly_table
3347 (and _novlys, which is needed for the table's size) */
3349 simple_read_overlay_table (void)
3351 struct minimal_symbol
*novlys_msym
, *ovly_table_msym
;
3353 simple_free_overlay_table ();
3354 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3357 error ("Error reading inferior's overlay table: "
3358 "couldn't find `_novlys' variable\n"
3359 "in inferior. Use `overlay manual' mode.");
3363 ovly_table_msym
= lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3364 if (! ovly_table_msym
)
3366 error ("Error reading inferior's overlay table: couldn't find "
3367 "`_ovly_table' array\n"
3368 "in inferior. Use `overlay manual' mode.");
3372 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
), 4);
3374 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3375 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3376 read_target_long_array (cache_ovly_table_base
,
3377 (int *) cache_ovly_table
,
3380 return 1; /* SUCCESS */
3384 /* Find and grab a copy of the target _ovly_region_table
3385 (and _novly_regions, which is needed for the table's size) */
3387 simple_read_overlay_region_table (void)
3389 struct minimal_symbol
*msym
;
3391 simple_free_overlay_region_table ();
3392 msym
= lookup_minimal_symbol ("_novly_regions", NULL
, NULL
);
3394 cache_novly_regions
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
3396 return 0; /* failure */
3397 cache_ovly_region_table
= (void *) xmalloc (cache_novly_regions
* 12);
3398 if (cache_ovly_region_table
!= NULL
)
3400 msym
= lookup_minimal_symbol ("_ovly_region_table", NULL
, NULL
);
3403 cache_ovly_region_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3404 read_target_long_array (cache_ovly_region_table_base
,
3405 (int *) cache_ovly_region_table
,
3406 cache_novly_regions
* 3);
3409 return 0; /* failure */
3412 return 0; /* failure */
3413 return 1; /* SUCCESS */
3417 /* Function: simple_overlay_update_1
3418 A helper function for simple_overlay_update. Assuming a cached copy
3419 of _ovly_table exists, look through it to find an entry whose vma,
3420 lma and size match those of OSECT. Re-read the entry and make sure
3421 it still matches OSECT (else the table may no longer be valid).
3422 Set OSECT's mapped state to match the entry. Return: 1 for
3423 success, 0 for failure. */
3426 simple_overlay_update_1 (struct obj_section
*osect
)
3429 bfd
*obfd
= osect
->objfile
->obfd
;
3430 asection
*bsect
= osect
->the_bfd_section
;
3432 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3433 for (i
= 0; i
< cache_novlys
; i
++)
3434 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3435 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3436 /* && cache_ovly_table[i][SIZE] == size */ )
3438 read_target_long_array (cache_ovly_table_base
+ i
* TARGET_LONG_BYTES
,
3439 (int *) cache_ovly_table
[i
], 4);
3440 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3441 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3442 /* && cache_ovly_table[i][SIZE] == size */ )
3444 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3447 else /* Warning! Warning! Target's ovly table has changed! */
3453 /* Function: simple_overlay_update
3454 If OSECT is NULL, then update all sections' mapped state
3455 (after re-reading the entire target _ovly_table).
3456 If OSECT is non-NULL, then try to find a matching entry in the
3457 cached ovly_table and update only OSECT's mapped state.
3458 If a cached entry can't be found or the cache isn't valid, then
3459 re-read the entire cache, and go ahead and update all sections. */
3462 simple_overlay_update (struct obj_section
*osect
)
3464 struct objfile
*objfile
;
3466 /* Were we given an osect to look up? NULL means do all of them. */
3468 /* Have we got a cached copy of the target's overlay table? */
3469 if (cache_ovly_table
!= NULL
)
3470 /* Does its cached location match what's currently in the symtab? */
3471 if (cache_ovly_table_base
==
3472 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL
, NULL
)))
3473 /* Then go ahead and try to look up this single section in the cache */
3474 if (simple_overlay_update_1 (osect
))
3475 /* Found it! We're done. */
3478 /* Cached table no good: need to read the entire table anew.
3479 Or else we want all the sections, in which case it's actually
3480 more efficient to read the whole table in one block anyway. */
3482 if (! simple_read_overlay_table ())
3485 /* Now may as well update all sections, even if only one was requested. */
3486 ALL_OBJSECTIONS (objfile
, osect
)
3487 if (section_is_overlay (osect
->the_bfd_section
))
3490 bfd
*obfd
= osect
->objfile
->obfd
;
3491 asection
*bsect
= osect
->the_bfd_section
;
3493 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3494 for (i
= 0; i
< cache_novlys
; i
++)
3495 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3496 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3497 /* && cache_ovly_table[i][SIZE] == size */ )
3498 { /* obj_section matches i'th entry in ovly_table */
3499 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3500 break; /* finished with inner for loop: break out */
3505 /* Set the output sections and output offsets for section SECTP in
3506 ABFD. The relocation code in BFD will read these offsets, so we
3507 need to be sure they're initialized. We map each section to itself,
3508 with no offset; this means that SECTP->vma will be honored. */
3511 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3513 sectp
->output_section
= sectp
;
3514 sectp
->output_offset
= 0;
3517 /* Relocate the contents of a debug section SECTP in ABFD. The
3518 contents are stored in BUF if it is non-NULL, or returned in a
3519 malloc'd buffer otherwise.
3521 For some platforms and debug info formats, shared libraries contain
3522 relocations against the debug sections (particularly for DWARF-2;
3523 one affected platform is PowerPC GNU/Linux, although it depends on
3524 the version of the linker in use). Also, ELF object files naturally
3525 have unresolved relocations for their debug sections. We need to apply
3526 the relocations in order to get the locations of symbols correct. */
3529 symfile_relocate_debug_section (bfd
*abfd
, asection
*sectp
, bfd_byte
*buf
)
3531 /* We're only interested in debugging sections with relocation
3533 if ((sectp
->flags
& SEC_RELOC
) == 0)
3535 if ((sectp
->flags
& SEC_DEBUGGING
) == 0)
3538 /* We will handle section offsets properly elsewhere, so relocate as if
3539 all sections begin at 0. */
3540 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3542 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3546 _initialize_symfile (void)
3548 struct cmd_list_element
*c
;
3550 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
,
3551 "Load symbol table from executable file FILE.\n\
3552 The `file' command can also load symbol tables, as well as setting the file\n\
3553 to execute.", &cmdlist
);
3554 set_cmd_completer (c
, filename_completer
);
3556 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
,
3557 "Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3558 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3559 ADDR is the starting address of the file's text.\n\
3560 The optional arguments are section-name section-address pairs and\n\
3561 should be specified if the data and bss segments are not contiguous\n\
3562 with the text. SECT is a section name to be loaded at SECT_ADDR.",
3564 set_cmd_completer (c
, filename_completer
);
3566 c
= add_cmd ("add-shared-symbol-files", class_files
,
3567 add_shared_symbol_files_command
,
3568 "Load the symbols from shared objects in the dynamic linker's link map.",
3570 c
= add_alias_cmd ("assf", "add-shared-symbol-files", class_files
, 1,
3573 c
= add_cmd ("load", class_files
, load_command
,
3574 "Dynamically load FILE into the running program, and record its symbols\n\
3575 for access from GDB.", &cmdlist
);
3576 set_cmd_completer (c
, filename_completer
);
3579 (add_set_cmd ("symbol-reloading", class_support
, var_boolean
,
3580 (char *) &symbol_reloading
,
3581 "Set dynamic symbol table reloading multiple times in one run.",
3585 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3586 "Commands for debugging overlays.", &overlaylist
,
3587 "overlay ", 0, &cmdlist
);
3589 add_com_alias ("ovly", "overlay", class_alias
, 1);
3590 add_com_alias ("ov", "overlay", class_alias
, 1);
3592 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3593 "Assert that an overlay section is mapped.", &overlaylist
);
3595 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3596 "Assert that an overlay section is unmapped.", &overlaylist
);
3598 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3599 "List mappings of overlay sections.", &overlaylist
);
3601 add_cmd ("manual", class_support
, overlay_manual_command
,
3602 "Enable overlay debugging.", &overlaylist
);
3603 add_cmd ("off", class_support
, overlay_off_command
,
3604 "Disable overlay debugging.", &overlaylist
);
3605 add_cmd ("auto", class_support
, overlay_auto_command
,
3606 "Enable automatic overlay debugging.", &overlaylist
);
3607 add_cmd ("load-target", class_support
, overlay_load_command
,
3608 "Read the overlay mapping state from the target.", &overlaylist
);
3610 /* Filename extension to source language lookup table: */
3611 init_filename_language_table ();
3612 c
= add_set_cmd ("extension-language", class_files
, var_string_noescape
,
3614 "Set mapping between filename extension and source language.\n\
3615 Usage: set extension-language .foo bar",
3617 set_cmd_cfunc (c
, set_ext_lang_command
);
3619 add_info ("extensions", info_ext_lang_command
,
3620 "All filename extensions associated with a source language.");
3623 (add_set_cmd ("download-write-size", class_obscure
,
3624 var_integer
, (char *) &download_write_size
,
3625 "Set the write size used when downloading a program.\n"
3626 "Only used when downloading a program onto a remote\n"
3627 "target. Specify zero, or a negative value, to disable\n"
3628 "blocked writes. The actual size of each transfer is also\n"
3629 "limited by the size of the target packet and the memory\n"
3634 debug_file_directory
= xstrdup (DEBUGDIR
);
3636 ("debug-file-directory", class_support
, var_string
,
3637 (char *) &debug_file_directory
,
3638 "Set the directory where separate debug symbols are searched for.\n"
3639 "Separate debug symbols are first searched for in the same\n"
3640 "directory as the binary, then in the `" DEBUG_SUBDIRECTORY
3642 "and lastly at the path of the directory of the binary with\n"
3643 "the global debug-file directory prepended\n",
3645 add_show_from_set (c
, &showlist
);
3646 set_cmd_completer (c
, filename_completer
);