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 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 /* Since this function is called from within qsort, in an ANSI environment
203 it must conform to the prototype for qsort, which specifies that the
204 comparison function takes two "void *" pointers. */
207 compare_symbols (const void *s1p
, const void *s2p
)
209 register struct symbol
**s1
, **s2
;
211 s1
= (struct symbol
**) s1p
;
212 s2
= (struct symbol
**) s2p
;
213 return (strcmp (SYMBOL_NATURAL_NAME (*s1
), SYMBOL_NATURAL_NAME (*s2
)));
216 /* This compares two partial symbols by names, using strcmp_iw_ordered
217 for the comparison. */
220 compare_psymbols (const void *s1p
, const void *s2p
)
222 struct partial_symbol
*const *s1
= s1p
;
223 struct partial_symbol
*const *s2
= s2p
;
225 return strcmp_iw_ordered (SYMBOL_NATURAL_NAME (*s1
),
226 SYMBOL_NATURAL_NAME (*s2
));
230 sort_pst_symbols (struct partial_symtab
*pst
)
232 /* Sort the global list; don't sort the static list */
234 qsort (pst
->objfile
->global_psymbols
.list
+ pst
->globals_offset
,
235 pst
->n_global_syms
, sizeof (struct partial_symbol
*),
239 /* Make a null terminated copy of the string at PTR with SIZE characters in
240 the obstack pointed to by OBSTACKP . Returns the address of the copy.
241 Note that the string at PTR does not have to be null terminated, I.E. it
242 may be part of a larger string and we are only saving a substring. */
245 obsavestring (const char *ptr
, int size
, struct obstack
*obstackp
)
247 register char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
248 /* Open-coded memcpy--saves function call time. These strings are usually
249 short. FIXME: Is this really still true with a compiler that can
252 register const char *p1
= ptr
;
253 register char *p2
= p
;
254 const char *end
= ptr
+ size
;
262 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
263 in the obstack pointed to by OBSTACKP. */
266 obconcat (struct obstack
*obstackp
, const char *s1
, const char *s2
,
269 register int len
= strlen (s1
) + strlen (s2
) + strlen (s3
) + 1;
270 register char *val
= (char *) obstack_alloc (obstackp
, len
);
277 /* True if we are nested inside psymtab_to_symtab. */
279 int currently_reading_symtab
= 0;
282 decrement_reading_symtab (void *dummy
)
284 currently_reading_symtab
--;
287 /* Get the symbol table that corresponds to a partial_symtab.
288 This is fast after the first time you do it. In fact, there
289 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
293 psymtab_to_symtab (register struct partial_symtab
*pst
)
295 /* If it's been looked up before, return it. */
299 /* If it has not yet been read in, read it. */
302 struct cleanup
*back_to
= make_cleanup (decrement_reading_symtab
, NULL
);
303 currently_reading_symtab
++;
304 (*pst
->read_symtab
) (pst
);
305 do_cleanups (back_to
);
311 /* Initialize entry point information for this objfile. */
314 init_entry_point_info (struct objfile
*objfile
)
316 /* Save startup file's range of PC addresses to help blockframe.c
317 decide where the bottom of the stack is. */
319 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
321 /* Executable file -- record its entry point so we'll recognize
322 the startup file because it contains the entry point. */
323 objfile
->ei
.entry_point
= bfd_get_start_address (objfile
->obfd
);
327 /* Examination of non-executable.o files. Short-circuit this stuff. */
328 objfile
->ei
.entry_point
= INVALID_ENTRY_POINT
;
330 objfile
->ei
.entry_file_lowpc
= INVALID_ENTRY_LOWPC
;
331 objfile
->ei
.entry_file_highpc
= INVALID_ENTRY_HIGHPC
;
332 objfile
->ei
.entry_func_lowpc
= INVALID_ENTRY_LOWPC
;
333 objfile
->ei
.entry_func_highpc
= INVALID_ENTRY_HIGHPC
;
334 objfile
->ei
.main_func_lowpc
= INVALID_ENTRY_LOWPC
;
335 objfile
->ei
.main_func_highpc
= INVALID_ENTRY_HIGHPC
;
338 /* Get current entry point address. */
341 entry_point_address (void)
343 return symfile_objfile
? symfile_objfile
->ei
.entry_point
: 0;
346 /* Remember the lowest-addressed loadable section we've seen.
347 This function is called via bfd_map_over_sections.
349 In case of equal vmas, the section with the largest size becomes the
350 lowest-addressed loadable section.
352 If the vmas and sizes are equal, the last section is considered the
353 lowest-addressed loadable section. */
356 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
358 asection
**lowest
= (asection
**) obj
;
360 if (0 == (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
))
363 *lowest
= sect
; /* First loadable section */
364 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
365 *lowest
= sect
; /* A lower loadable section */
366 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
367 && (bfd_section_size (abfd
, (*lowest
))
368 <= bfd_section_size (abfd
, sect
)))
372 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
374 struct section_addr_info
*
375 alloc_section_addr_info (size_t num_sections
)
377 struct section_addr_info
*sap
;
380 size
= (sizeof (struct section_addr_info
)
381 + sizeof (struct other_sections
) * (num_sections
- 1));
382 sap
= (struct section_addr_info
*) xmalloc (size
);
383 memset (sap
, 0, size
);
384 sap
->num_sections
= num_sections
;
389 /* Build (allocate and populate) a section_addr_info struct from
390 an existing section table. */
392 extern struct section_addr_info
*
393 build_section_addr_info_from_section_table (const struct section_table
*start
,
394 const struct section_table
*end
)
396 struct section_addr_info
*sap
;
397 const struct section_table
*stp
;
400 sap
= alloc_section_addr_info (end
- start
);
402 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
404 if (bfd_get_section_flags (stp
->bfd
,
405 stp
->the_bfd_section
) & (SEC_ALLOC
| SEC_LOAD
)
406 && oidx
< end
- start
)
408 sap
->other
[oidx
].addr
= stp
->addr
;
409 sap
->other
[oidx
].name
410 = xstrdup (bfd_section_name (stp
->bfd
, stp
->the_bfd_section
));
411 sap
->other
[oidx
].sectindex
= stp
->the_bfd_section
->index
;
420 /* Free all memory allocated by build_section_addr_info_from_section_table. */
423 free_section_addr_info (struct section_addr_info
*sap
)
427 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
428 if (sap
->other
[idx
].name
)
429 xfree (sap
->other
[idx
].name
);
434 /* Initialize OBJFILE's sect_index_* members. */
436 init_objfile_sect_indices (struct objfile
*objfile
)
441 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
443 objfile
->sect_index_text
= sect
->index
;
445 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
447 objfile
->sect_index_data
= sect
->index
;
449 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
451 objfile
->sect_index_bss
= sect
->index
;
453 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
455 objfile
->sect_index_rodata
= sect
->index
;
457 /* This is where things get really weird... We MUST have valid
458 indices for the various sect_index_* members or gdb will abort.
459 So if for example, there is no ".text" section, we have to
460 accomodate that. Except when explicitly adding symbol files at
461 some address, section_offsets contains nothing but zeros, so it
462 doesn't matter which slot in section_offsets the individual
463 sect_index_* members index into. So if they are all zero, it is
464 safe to just point all the currently uninitialized indices to the
467 for (i
= 0; i
< objfile
->num_sections
; i
++)
469 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
474 if (i
== objfile
->num_sections
)
476 if (objfile
->sect_index_text
== -1)
477 objfile
->sect_index_text
= 0;
478 if (objfile
->sect_index_data
== -1)
479 objfile
->sect_index_data
= 0;
480 if (objfile
->sect_index_bss
== -1)
481 objfile
->sect_index_bss
= 0;
482 if (objfile
->sect_index_rodata
== -1)
483 objfile
->sect_index_rodata
= 0;
488 /* Parse the user's idea of an offset for dynamic linking, into our idea
489 of how to represent it for fast symbol reading. This is the default
490 version of the sym_fns.sym_offsets function for symbol readers that
491 don't need to do anything special. It allocates a section_offsets table
492 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
495 default_symfile_offsets (struct objfile
*objfile
,
496 struct section_addr_info
*addrs
)
500 objfile
->num_sections
= bfd_count_sections (objfile
->obfd
);
501 objfile
->section_offsets
= (struct section_offsets
*)
502 obstack_alloc (&objfile
->psymbol_obstack
,
503 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
504 memset (objfile
->section_offsets
, 0,
505 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
507 /* Now calculate offsets for section that were specified by the
509 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
511 struct other_sections
*osp
;
513 osp
= &addrs
->other
[i
] ;
517 /* Record all sections in offsets */
518 /* The section_offsets in the objfile are here filled in using
520 (objfile
->section_offsets
)->offsets
[osp
->sectindex
] = osp
->addr
;
523 /* Remember the bfd indexes for the .text, .data, .bss and
525 init_objfile_sect_indices (objfile
);
529 /* Process a symbol file, as either the main file or as a dynamically
532 OBJFILE is where the symbols are to be read from.
534 ADDRS is the list of section load addresses. If the user has given
535 an 'add-symbol-file' command, then this is the list of offsets and
536 addresses he or she provided as arguments to the command; or, if
537 we're handling a shared library, these are the actual addresses the
538 sections are loaded at, according to the inferior's dynamic linker
539 (as gleaned by GDB's shared library code). We convert each address
540 into an offset from the section VMA's as it appears in the object
541 file, and then call the file's sym_offsets function to convert this
542 into a format-specific offset table --- a `struct section_offsets'.
543 If ADDRS is non-zero, OFFSETS must be zero.
545 OFFSETS is a table of section offsets already in the right
546 format-specific representation. NUM_OFFSETS is the number of
547 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
548 assume this is the proper table the call to sym_offsets described
549 above would produce. Instead of calling sym_offsets, we just dump
550 it right into objfile->section_offsets. (When we're re-reading
551 symbols from an objfile, we don't have the original load address
552 list any more; all we have is the section offset table.) If
553 OFFSETS is non-zero, ADDRS must be zero.
555 MAINLINE is nonzero if this is the main symbol file, or zero if
556 it's an extra symbol file such as dynamically loaded code.
558 VERBO is nonzero if the caller has printed a verbose message about
559 the symbol reading (and complaints can be more terse about it). */
562 syms_from_objfile (struct objfile
*objfile
,
563 struct section_addr_info
*addrs
,
564 struct section_offsets
*offsets
,
569 asection
*lower_sect
;
571 CORE_ADDR lower_offset
;
572 struct section_addr_info
*local_addr
= NULL
;
573 struct cleanup
*old_chain
;
576 gdb_assert (! (addrs
&& offsets
));
578 init_entry_point_info (objfile
);
579 find_sym_fns (objfile
);
581 if (objfile
->sf
== NULL
)
582 return; /* No symbols. */
584 /* Make sure that partially constructed symbol tables will be cleaned up
585 if an error occurs during symbol reading. */
586 old_chain
= make_cleanup_free_objfile (objfile
);
588 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
589 list. We now establish the convention that an addr of zero means
590 no load address was specified. */
591 if (! addrs
&& ! offsets
)
594 = alloc_section_addr_info (bfd_count_sections (objfile
->obfd
));
595 make_cleanup (xfree
, local_addr
);
599 /* Now either addrs or offsets is non-zero. */
603 /* We will modify the main symbol table, make sure that all its users
604 will be cleaned up if an error occurs during symbol reading. */
605 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
607 /* Since no error yet, throw away the old symbol table. */
609 if (symfile_objfile
!= NULL
)
611 free_objfile (symfile_objfile
);
612 symfile_objfile
= NULL
;
615 /* Currently we keep symbols from the add-symbol-file command.
616 If the user wants to get rid of them, they should do "symbol-file"
617 without arguments first. Not sure this is the best behavior
620 (*objfile
->sf
->sym_new_init
) (objfile
);
623 /* Convert addr into an offset rather than an absolute address.
624 We find the lowest address of a loaded segment in the objfile,
625 and assume that <addr> is where that got loaded.
627 We no longer warn if the lowest section is not a text segment (as
628 happens for the PA64 port. */
631 /* Find lowest loadable section to be used as starting point for
632 continguous sections. FIXME!! won't work without call to find
633 .text first, but this assumes text is lowest section. */
634 lower_sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
635 if (lower_sect
== NULL
)
636 bfd_map_over_sections (objfile
->obfd
, find_lowest_section
,
638 if (lower_sect
== NULL
)
639 warning ("no loadable sections found in added symbol-file %s",
642 if ((bfd_get_section_flags (objfile
->obfd
, lower_sect
) & SEC_CODE
) == 0)
643 warning ("Lowest section in %s is %s at %s",
645 bfd_section_name (objfile
->obfd
, lower_sect
),
646 paddr (bfd_section_vma (objfile
->obfd
, lower_sect
)));
647 if (lower_sect
!= NULL
)
648 lower_offset
= bfd_section_vma (objfile
->obfd
, lower_sect
);
652 /* Calculate offsets for the loadable sections.
653 FIXME! Sections must be in order of increasing loadable section
654 so that contiguous sections can use the lower-offset!!!
656 Adjust offsets if the segments are not contiguous.
657 If the section is contiguous, its offset should be set to
658 the offset of the highest loadable section lower than it
659 (the loadable section directly below it in memory).
660 this_offset = lower_offset = lower_addr - lower_orig_addr */
662 /* Calculate offsets for sections. */
664 for (i
=0 ; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
666 if (addrs
->other
[i
].addr
!= 0)
668 sect
= bfd_get_section_by_name (objfile
->obfd
,
669 addrs
->other
[i
].name
);
673 -= bfd_section_vma (objfile
->obfd
, sect
);
674 lower_offset
= addrs
->other
[i
].addr
;
675 /* This is the index used by BFD. */
676 addrs
->other
[i
].sectindex
= sect
->index
;
680 warning ("section %s not found in %s",
681 addrs
->other
[i
].name
,
683 addrs
->other
[i
].addr
= 0;
687 addrs
->other
[i
].addr
= lower_offset
;
691 /* Initialize symbol reading routines for this objfile, allow complaints to
692 appear for this new file, and record how verbose to be, then do the
693 initial symbol reading for this file. */
695 (*objfile
->sf
->sym_init
) (objfile
);
696 clear_complaints (&symfile_complaints
, 1, verbo
);
699 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
702 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_offsets
);
704 /* Just copy in the offset table directly as given to us. */
705 objfile
->num_sections
= num_offsets
;
706 objfile
->section_offsets
707 = ((struct section_offsets
*)
708 obstack_alloc (&objfile
->psymbol_obstack
, size
));
709 memcpy (objfile
->section_offsets
, offsets
, size
);
711 init_objfile_sect_indices (objfile
);
714 #ifndef IBM6000_TARGET
715 /* This is a SVR4/SunOS specific hack, I think. In any event, it
716 screws RS/6000. sym_offsets should be doing this sort of thing,
717 because it knows the mapping between bfd sections and
719 /* This is a hack. As far as I can tell, section offsets are not
720 target dependent. They are all set to addr with a couple of
721 exceptions. The exceptions are sysvr4 shared libraries, whose
722 offsets are kept in solib structures anyway and rs6000 xcoff
723 which handles shared libraries in a completely unique way.
725 Section offsets are built similarly, except that they are built
726 by adding addr in all cases because there is no clear mapping
727 from section_offsets into actual sections. Note that solib.c
728 has a different algorithm for finding section offsets.
730 These should probably all be collapsed into some target
731 independent form of shared library support. FIXME. */
735 struct obj_section
*s
;
737 /* Map section offsets in "addr" back to the object's
738 sections by comparing the section names with bfd's
739 section names. Then adjust the section address by
740 the offset. */ /* for gdb/13815 */
742 ALL_OBJFILE_OSECTIONS (objfile
, s
)
744 CORE_ADDR s_addr
= 0;
748 !s_addr
&& i
< addrs
->num_sections
&& addrs
->other
[i
].name
;
750 if (strcmp (bfd_section_name (s
->objfile
->obfd
,
752 addrs
->other
[i
].name
) == 0)
753 s_addr
= addrs
->other
[i
].addr
; /* end added for gdb/13815 */
755 s
->addr
-= s
->offset
;
757 s
->endaddr
-= s
->offset
;
758 s
->endaddr
+= s_addr
;
762 #endif /* not IBM6000_TARGET */
764 (*objfile
->sf
->sym_read
) (objfile
, mainline
);
766 /* Don't allow char * to have a typename (else would get caddr_t).
767 Ditto void *. FIXME: Check whether this is now done by all the
768 symbol readers themselves (many of them now do), and if so remove
771 TYPE_NAME (lookup_pointer_type (builtin_type_char
)) = 0;
772 TYPE_NAME (lookup_pointer_type (builtin_type_void
)) = 0;
774 /* Mark the objfile has having had initial symbol read attempted. Note
775 that this does not mean we found any symbols... */
777 objfile
->flags
|= OBJF_SYMS
;
779 /* Discard cleanups as symbol reading was successful. */
781 discard_cleanups (old_chain
);
784 /* Perform required actions after either reading in the initial
785 symbols for a new objfile, or mapping in the symbols from a reusable
789 new_symfile_objfile (struct objfile
*objfile
, int mainline
, int verbo
)
792 /* If this is the main symbol file we have to clean up all users of the
793 old main symbol file. Otherwise it is sufficient to fixup all the
794 breakpoints that may have been redefined by this symbol file. */
797 /* OK, make it the "real" symbol file. */
798 symfile_objfile
= objfile
;
800 clear_symtab_users ();
804 breakpoint_re_set ();
807 /* We're done reading the symbol file; finish off complaints. */
808 clear_complaints (&symfile_complaints
, 0, verbo
);
811 /* Process a symbol file, as either the main file or as a dynamically
814 NAME is the file name (which will be tilde-expanded and made
815 absolute herein) (but we don't free or modify NAME itself).
817 FROM_TTY says how verbose to be.
819 MAINLINE specifies whether this is the main symbol file, or whether
820 it's an extra symbol file such as dynamically loaded code.
822 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
823 syms_from_objfile, above. ADDRS is ignored when MAINLINE is
826 Upon success, returns a pointer to the objfile that was added.
827 Upon failure, jumps back to command level (never returns). */
828 static struct objfile
*
829 symbol_file_add_with_addrs_or_offsets (char *name
, int from_tty
,
830 struct section_addr_info
*addrs
,
831 struct section_offsets
*offsets
,
833 int mainline
, int flags
)
835 struct objfile
*objfile
;
836 struct partial_symtab
*psymtab
;
839 struct section_addr_info
*orig_addrs
;
840 struct cleanup
*my_cleanups
;
842 /* Open a bfd for the file, and give user a chance to burp if we'd be
843 interactively wiping out any existing symbols. */
845 abfd
= symfile_bfd_open (name
);
847 if ((have_full_symbols () || have_partial_symbols ())
850 && !query ("Load new symbol table from \"%s\"? ", name
))
851 error ("Not confirmed.");
853 objfile
= allocate_objfile (abfd
, flags
);
855 orig_addrs
= alloc_section_addr_info (bfd_count_sections (abfd
));
856 my_cleanups
= make_cleanup (xfree
, orig_addrs
);
858 *orig_addrs
= *addrs
;
860 /* If the objfile uses a mapped symbol file, and we have a psymtab for
861 it, then skip reading any symbols at this time. */
863 if ((objfile
->flags
& OBJF_MAPPED
) && (objfile
->flags
& OBJF_SYMS
))
865 /* We mapped in an existing symbol table file that already has had
866 initial symbol reading performed, so we can skip that part. Notify
867 the user that instead of reading the symbols, they have been mapped.
869 if (from_tty
|| info_verbose
)
871 printf_filtered ("Mapped symbols for %s...", name
);
873 gdb_flush (gdb_stdout
);
875 init_entry_point_info (objfile
);
876 find_sym_fns (objfile
);
880 /* We either created a new mapped symbol table, mapped an existing
881 symbol table file which has not had initial symbol reading
882 performed, or need to read an unmapped symbol table. */
883 if (from_tty
|| info_verbose
)
885 if (pre_add_symbol_hook
)
886 pre_add_symbol_hook (name
);
889 printf_filtered ("Reading symbols from %s...", name
);
891 gdb_flush (gdb_stdout
);
894 syms_from_objfile (objfile
, addrs
, offsets
, num_offsets
,
898 /* We now have at least a partial symbol table. Check to see if the
899 user requested that all symbols be read on initial access via either
900 the gdb startup command line or on a per symbol file basis. Expand
901 all partial symbol tables for this objfile if so. */
903 if ((flags
& OBJF_READNOW
) || readnow_symbol_files
)
905 if (from_tty
|| info_verbose
)
907 printf_filtered ("expanding to full symbols...");
909 gdb_flush (gdb_stdout
);
912 for (psymtab
= objfile
->psymtabs
;
914 psymtab
= psymtab
->next
)
916 psymtab_to_symtab (psymtab
);
920 debugfile
= find_separate_debug_file (objfile
);
925 objfile
->separate_debug_objfile
926 = symbol_file_add (debugfile
, from_tty
, orig_addrs
, 0, flags
);
930 objfile
->separate_debug_objfile
931 = symbol_file_add (debugfile
, from_tty
, NULL
, 0, flags
);
933 objfile
->separate_debug_objfile
->separate_debug_objfile_backlink
936 /* Put the separate debug object before the normal one, this is so that
937 usage of the ALL_OBJFILES_SAFE macro will stay safe. */
938 put_objfile_before (objfile
->separate_debug_objfile
, objfile
);
943 if (!have_partial_symbols () && !have_full_symbols ())
946 printf_filtered ("(no debugging symbols found)...");
950 if (from_tty
|| info_verbose
)
952 if (post_add_symbol_hook
)
953 post_add_symbol_hook ();
956 printf_filtered ("done.\n");
960 /* We print some messages regardless of whether 'from_tty ||
961 info_verbose' is true, so make sure they go out at the right
963 gdb_flush (gdb_stdout
);
965 do_cleanups (my_cleanups
);
967 if (objfile
->sf
== NULL
)
968 return objfile
; /* No symbols. */
970 new_symfile_objfile (objfile
, mainline
, from_tty
);
972 if (target_new_objfile_hook
)
973 target_new_objfile_hook (objfile
);
979 /* Process a symbol file, as either the main file or as a dynamically
980 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
983 symbol_file_add (char *name
, int from_tty
, struct section_addr_info
*addrs
,
984 int mainline
, int flags
)
986 return symbol_file_add_with_addrs_or_offsets (name
, from_tty
, addrs
, 0, 0,
991 /* Call symbol_file_add() with default values and update whatever is
992 affected by the loading of a new main().
993 Used when the file is supplied in the gdb command line
994 and by some targets with special loading requirements.
995 The auxiliary function, symbol_file_add_main_1(), has the flags
996 argument for the switches that can only be specified in the symbol_file
1000 symbol_file_add_main (char *args
, int from_tty
)
1002 symbol_file_add_main_1 (args
, from_tty
, 0);
1006 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
1008 symbol_file_add (args
, from_tty
, NULL
, 1, flags
);
1011 RESET_HP_UX_GLOBALS ();
1014 /* Getting new symbols may change our opinion about
1015 what is frameless. */
1016 reinit_frame_cache ();
1018 set_initial_language ();
1022 symbol_file_clear (int from_tty
)
1024 if ((have_full_symbols () || have_partial_symbols ())
1026 && !query ("Discard symbol table from `%s'? ",
1027 symfile_objfile
->name
))
1028 error ("Not confirmed.");
1029 free_all_objfiles ();
1031 /* solib descriptors may have handles to objfiles. Since their
1032 storage has just been released, we'd better wipe the solib
1033 descriptors as well.
1035 #if defined(SOLIB_RESTART)
1039 symfile_objfile
= NULL
;
1041 printf_unfiltered ("No symbol file now.\n");
1043 RESET_HP_UX_GLOBALS ();
1048 get_debug_link_info (struct objfile
*objfile
, unsigned long *crc32_out
)
1051 bfd_size_type debuglink_size
;
1052 unsigned long crc32
;
1057 sect
= bfd_get_section_by_name (objfile
->obfd
, ".gnu_debuglink");
1062 debuglink_size
= bfd_section_size (objfile
->obfd
, sect
);
1064 contents
= xmalloc (debuglink_size
);
1065 bfd_get_section_contents (objfile
->obfd
, sect
, contents
,
1066 (file_ptr
)0, (bfd_size_type
)debuglink_size
);
1068 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1069 crc_offset
= strlen (contents
) + 1;
1070 crc_offset
= (crc_offset
+ 3) & ~3;
1072 crc32
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) (contents
+ crc_offset
));
1079 separate_debug_file_exists (const char *name
, unsigned long crc
)
1081 unsigned long file_crc
= 0;
1083 char buffer
[8*1024];
1086 fd
= open (name
, O_RDONLY
| O_BINARY
);
1090 while ((count
= read (fd
, buffer
, sizeof (buffer
))) > 0)
1091 file_crc
= gnu_debuglink_crc32 (file_crc
, buffer
, count
);
1095 return crc
== file_crc
;
1098 static char *debug_file_directory
= NULL
;
1100 #if ! defined (DEBUG_SUBDIRECTORY)
1101 #define DEBUG_SUBDIRECTORY ".debug"
1105 find_separate_debug_file (struct objfile
*objfile
)
1112 bfd_size_type debuglink_size
;
1113 unsigned long crc32
;
1116 basename
= get_debug_link_info (objfile
, &crc32
);
1118 if (basename
== NULL
)
1121 dir
= xstrdup (objfile
->name
);
1123 /* Strip off the final filename part, leaving the directory name,
1124 followed by a slash. Objfile names should always be absolute and
1125 tilde-expanded, so there should always be a slash in there
1127 for (i
= strlen(dir
) - 1; i
>= 0; i
--)
1129 if (IS_DIR_SEPARATOR (dir
[i
]))
1132 gdb_assert (i
>= 0 && IS_DIR_SEPARATOR (dir
[i
]));
1135 debugfile
= alloca (strlen (debug_file_directory
) + 1
1137 + strlen (DEBUG_SUBDIRECTORY
)
1142 /* First try in the same directory as the original file. */
1143 strcpy (debugfile
, dir
);
1144 strcat (debugfile
, basename
);
1146 if (separate_debug_file_exists (debugfile
, crc32
))
1150 return xstrdup (debugfile
);
1153 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1154 strcpy (debugfile
, dir
);
1155 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1156 strcat (debugfile
, "/");
1157 strcat (debugfile
, basename
);
1159 if (separate_debug_file_exists (debugfile
, crc32
))
1163 return xstrdup (debugfile
);
1166 /* Then try in the global debugfile directory. */
1167 strcpy (debugfile
, debug_file_directory
);
1168 strcat (debugfile
, "/");
1169 strcat (debugfile
, dir
);
1170 strcat (debugfile
, basename
);
1172 if (separate_debug_file_exists (debugfile
, crc32
))
1176 return xstrdup (debugfile
);
1185 /* This is the symbol-file command. Read the file, analyze its
1186 symbols, and add a struct symtab to a symtab list. The syntax of
1187 the command is rather bizarre--(1) buildargv implements various
1188 quoting conventions which are undocumented and have little or
1189 nothing in common with the way things are quoted (or not quoted)
1190 elsewhere in GDB, (2) options are used, which are not generally
1191 used in GDB (perhaps "set mapped on", "set readnow on" would be
1192 better), (3) the order of options matters, which is contrary to GNU
1193 conventions (because it is confusing and inconvenient). */
1194 /* Note: ezannoni 2000-04-17. This function used to have support for
1195 rombug (see remote-os9k.c). It consisted of a call to target_link()
1196 (target.c) to get the address of the text segment from the target,
1197 and pass that to symbol_file_add(). This is no longer supported. */
1200 symbol_file_command (char *args
, int from_tty
)
1204 struct cleanup
*cleanups
;
1205 int flags
= OBJF_USERLOADED
;
1211 symbol_file_clear (from_tty
);
1215 if ((argv
= buildargv (args
)) == NULL
)
1219 cleanups
= make_cleanup_freeargv (argv
);
1220 while (*argv
!= NULL
)
1222 if (STREQ (*argv
, "-mapped"))
1223 flags
|= OBJF_MAPPED
;
1225 if (STREQ (*argv
, "-readnow"))
1226 flags
|= OBJF_READNOW
;
1229 error ("unknown option `%s'", *argv
);
1234 symbol_file_add_main_1 (name
, from_tty
, flags
);
1241 error ("no symbol file name was specified");
1243 do_cleanups (cleanups
);
1247 /* Set the initial language.
1249 A better solution would be to record the language in the psymtab when reading
1250 partial symbols, and then use it (if known) to set the language. This would
1251 be a win for formats that encode the language in an easily discoverable place,
1252 such as DWARF. For stabs, we can jump through hoops looking for specially
1253 named symbols or try to intuit the language from the specific type of stabs
1254 we find, but we can't do that until later when we read in full symbols.
1258 set_initial_language (void)
1260 struct partial_symtab
*pst
;
1261 enum language lang
= language_unknown
;
1263 pst
= find_main_psymtab ();
1266 if (pst
->filename
!= NULL
)
1268 lang
= deduce_language_from_filename (pst
->filename
);
1270 if (lang
== language_unknown
)
1272 /* Make C the default language */
1275 set_language (lang
);
1276 expected_language
= current_language
; /* Don't warn the user */
1280 /* Open file specified by NAME and hand it off to BFD for preliminary
1281 analysis. Result is a newly initialized bfd *, which includes a newly
1282 malloc'd` copy of NAME (tilde-expanded and made absolute).
1283 In case of trouble, error() is called. */
1286 symfile_bfd_open (char *name
)
1290 char *absolute_name
;
1294 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy */
1296 /* Look down path for it, allocate 2nd new malloc'd copy. */
1297 desc
= openp (getenv ("PATH"), 1, name
, O_RDONLY
| O_BINARY
, 0, &absolute_name
);
1298 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1301 char *exename
= alloca (strlen (name
) + 5);
1302 strcat (strcpy (exename
, name
), ".exe");
1303 desc
= openp (getenv ("PATH"), 1, exename
, O_RDONLY
| O_BINARY
,
1309 make_cleanup (xfree
, name
);
1310 perror_with_name (name
);
1312 xfree (name
); /* Free 1st new malloc'd copy */
1313 name
= absolute_name
; /* Keep 2nd malloc'd copy in bfd */
1314 /* It'll be freed in free_objfile(). */
1316 sym_bfd
= bfd_fdopenr (name
, gnutarget
, desc
);
1320 make_cleanup (xfree
, name
);
1321 error ("\"%s\": can't open to read symbols: %s.", name
,
1322 bfd_errmsg (bfd_get_error ()));
1324 sym_bfd
->cacheable
= 1;
1326 if (!bfd_check_format (sym_bfd
, bfd_object
))
1328 /* FIXME: should be checking for errors from bfd_close (for one thing,
1329 on error it does not free all the storage associated with the
1331 bfd_close (sym_bfd
); /* This also closes desc */
1332 make_cleanup (xfree
, name
);
1333 error ("\"%s\": can't read symbols: %s.", name
,
1334 bfd_errmsg (bfd_get_error ()));
1339 /* Return the section index for the given section name. Return -1 if
1340 the section was not found. */
1342 get_section_index (struct objfile
*objfile
, char *section_name
)
1344 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1351 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1352 startup by the _initialize routine in each object file format reader,
1353 to register information about each format the the reader is prepared
1357 add_symtab_fns (struct sym_fns
*sf
)
1359 sf
->next
= symtab_fns
;
1364 /* Initialize to read symbols from the symbol file sym_bfd. It either
1365 returns or calls error(). The result is an initialized struct sym_fns
1366 in the objfile structure, that contains cached information about the
1370 find_sym_fns (struct objfile
*objfile
)
1373 enum bfd_flavour our_flavour
= bfd_get_flavour (objfile
->obfd
);
1374 char *our_target
= bfd_get_target (objfile
->obfd
);
1376 if (our_flavour
== bfd_target_srec_flavour
1377 || our_flavour
== bfd_target_ihex_flavour
1378 || our_flavour
== bfd_target_tekhex_flavour
)
1379 return; /* No symbols. */
1381 /* Special kludge for apollo. See dstread.c. */
1382 if (STREQN (our_target
, "apollo", 6))
1383 our_flavour
= (enum bfd_flavour
) -2;
1385 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
->next
)
1387 if (our_flavour
== sf
->sym_flavour
)
1393 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
1394 bfd_get_target (objfile
->obfd
));
1397 /* This function runs the load command of our current target. */
1400 load_command (char *arg
, int from_tty
)
1403 arg
= get_exec_file (1);
1404 target_load (arg
, from_tty
);
1406 /* After re-loading the executable, we don't really know which
1407 overlays are mapped any more. */
1408 overlay_cache_invalid
= 1;
1411 /* This version of "load" should be usable for any target. Currently
1412 it is just used for remote targets, not inftarg.c or core files,
1413 on the theory that only in that case is it useful.
1415 Avoiding xmodem and the like seems like a win (a) because we don't have
1416 to worry about finding it, and (b) On VMS, fork() is very slow and so
1417 we don't want to run a subprocess. On the other hand, I'm not sure how
1418 performance compares. */
1420 static int download_write_size
= 512;
1421 static int validate_download
= 0;
1423 /* Callback service function for generic_load (bfd_map_over_sections). */
1426 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1428 bfd_size_type
*sum
= data
;
1430 *sum
+= bfd_get_section_size_before_reloc (asec
);
1433 /* Opaque data for load_section_callback. */
1434 struct load_section_data
{
1435 unsigned long load_offset
;
1436 unsigned long write_count
;
1437 unsigned long data_count
;
1438 bfd_size_type total_size
;
1441 /* Callback service function for generic_load (bfd_map_over_sections). */
1444 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1446 struct load_section_data
*args
= data
;
1448 if (bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
)
1450 bfd_size_type size
= bfd_get_section_size_before_reloc (asec
);
1454 struct cleanup
*old_chain
;
1455 CORE_ADDR lma
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1456 bfd_size_type block_size
;
1458 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1461 if (download_write_size
> 0 && size
> download_write_size
)
1462 block_size
= download_write_size
;
1466 buffer
= xmalloc (size
);
1467 old_chain
= make_cleanup (xfree
, buffer
);
1469 /* Is this really necessary? I guess it gives the user something
1470 to look at during a long download. */
1471 ui_out_message (uiout
, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1472 sect_name
, paddr_nz (size
), paddr_nz (lma
));
1474 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1480 bfd_size_type this_transfer
= size
- sent
;
1482 if (this_transfer
>= block_size
)
1483 this_transfer
= block_size
;
1484 len
= target_write_memory_partial (lma
, buffer
,
1485 this_transfer
, &err
);
1488 if (validate_download
)
1490 /* Broken memories and broken monitors manifest
1491 themselves here when bring new computers to
1492 life. This doubles already slow downloads. */
1493 /* NOTE: cagney/1999-10-18: A more efficient
1494 implementation might add a verify_memory()
1495 method to the target vector and then use
1496 that. remote.c could implement that method
1497 using the ``qCRC'' packet. */
1498 char *check
= xmalloc (len
);
1499 struct cleanup
*verify_cleanups
=
1500 make_cleanup (xfree
, check
);
1502 if (target_read_memory (lma
, check
, len
) != 0)
1503 error ("Download verify read failed at 0x%s",
1505 if (memcmp (buffer
, check
, len
) != 0)
1506 error ("Download verify compare failed at 0x%s",
1508 do_cleanups (verify_cleanups
);
1510 args
->data_count
+= len
;
1513 args
->write_count
+= 1;
1516 || (ui_load_progress_hook
!= NULL
1517 && ui_load_progress_hook (sect_name
, sent
)))
1518 error ("Canceled the download");
1520 if (show_load_progress
!= NULL
)
1521 show_load_progress (sect_name
, sent
, size
,
1522 args
->data_count
, args
->total_size
);
1524 while (sent
< size
);
1527 error ("Memory access error while loading section %s.", sect_name
);
1529 do_cleanups (old_chain
);
1535 generic_load (char *args
, int from_tty
)
1539 time_t start_time
, end_time
; /* Start and end times of download */
1541 struct cleanup
*old_cleanups
;
1543 struct load_section_data cbdata
;
1546 cbdata
.load_offset
= 0; /* Offset to add to vma for each section. */
1547 cbdata
.write_count
= 0; /* Number of writes needed. */
1548 cbdata
.data_count
= 0; /* Number of bytes written to target memory. */
1549 cbdata
.total_size
= 0; /* Total size of all bfd sectors. */
1551 /* Parse the input argument - the user can specify a load offset as
1552 a second argument. */
1553 filename
= xmalloc (strlen (args
) + 1);
1554 old_cleanups
= make_cleanup (xfree
, filename
);
1555 strcpy (filename
, args
);
1556 offptr
= strchr (filename
, ' ');
1561 cbdata
.load_offset
= strtoul (offptr
, &endptr
, 0);
1562 if (offptr
== endptr
)
1563 error ("Invalid download offset:%s\n", offptr
);
1567 cbdata
.load_offset
= 0;
1569 /* Open the file for loading. */
1570 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
1571 if (loadfile_bfd
== NULL
)
1573 perror_with_name (filename
);
1577 /* FIXME: should be checking for errors from bfd_close (for one thing,
1578 on error it does not free all the storage associated with the
1580 make_cleanup_bfd_close (loadfile_bfd
);
1582 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
1584 error ("\"%s\" is not an object file: %s", filename
,
1585 bfd_errmsg (bfd_get_error ()));
1588 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
1589 (void *) &cbdata
.total_size
);
1591 start_time
= time (NULL
);
1593 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
1595 end_time
= time (NULL
);
1597 entry
= bfd_get_start_address (loadfile_bfd
);
1598 ui_out_text (uiout
, "Start address ");
1599 ui_out_field_fmt (uiout
, "address", "0x%s", paddr_nz (entry
));
1600 ui_out_text (uiout
, ", load size ");
1601 ui_out_field_fmt (uiout
, "load-size", "%lu", cbdata
.data_count
);
1602 ui_out_text (uiout
, "\n");
1603 /* We were doing this in remote-mips.c, I suspect it is right
1604 for other targets too. */
1607 /* FIXME: are we supposed to call symbol_file_add or not? According
1608 to a comment from remote-mips.c (where a call to symbol_file_add
1609 was commented out), making the call confuses GDB if more than one
1610 file is loaded in. Some targets do (e.g., remote-vx.c) but
1611 others don't (or didn't - perhaphs they have all been deleted). */
1613 print_transfer_performance (gdb_stdout
, cbdata
.data_count
,
1614 cbdata
.write_count
, end_time
- start_time
);
1616 do_cleanups (old_cleanups
);
1619 /* Report how fast the transfer went. */
1621 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1622 replaced by print_transfer_performance (with a very different
1623 function signature). */
1626 report_transfer_performance (unsigned long data_count
, time_t start_time
,
1629 print_transfer_performance (gdb_stdout
, data_count
,
1630 end_time
- start_time
, 0);
1634 print_transfer_performance (struct ui_file
*stream
,
1635 unsigned long data_count
,
1636 unsigned long write_count
,
1637 unsigned long time_count
)
1639 ui_out_text (uiout
, "Transfer rate: ");
1642 ui_out_field_fmt (uiout
, "transfer-rate", "%lu",
1643 (data_count
* 8) / time_count
);
1644 ui_out_text (uiout
, " bits/sec");
1648 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
1649 ui_out_text (uiout
, " bits in <1 sec");
1651 if (write_count
> 0)
1653 ui_out_text (uiout
, ", ");
1654 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
1655 ui_out_text (uiout
, " bytes/write");
1657 ui_out_text (uiout
, ".\n");
1660 /* This function allows the addition of incrementally linked object files.
1661 It does not modify any state in the target, only in the debugger. */
1662 /* Note: ezannoni 2000-04-13 This function/command used to have a
1663 special case syntax for the rombug target (Rombug is the boot
1664 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
1665 rombug case, the user doesn't need to supply a text address,
1666 instead a call to target_link() (in target.c) would supply the
1667 value to use. We are now discontinuing this type of ad hoc syntax. */
1671 add_symbol_file_command (char *args
, int from_tty
)
1673 char *filename
= NULL
;
1674 int flags
= OBJF_USERLOADED
;
1676 int expecting_option
= 0;
1677 int section_index
= 0;
1681 int expecting_sec_name
= 0;
1682 int expecting_sec_addr
= 0;
1690 struct section_addr_info
*section_addrs
;
1691 struct sect_opt
*sect_opts
= NULL
;
1692 size_t num_sect_opts
= 0;
1693 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
1696 sect_opts
= (struct sect_opt
*) xmalloc (num_sect_opts
1697 * sizeof (struct sect_opt
));
1702 error ("add-symbol-file takes a file name and an address");
1704 /* Make a copy of the string that we can safely write into. */
1705 args
= xstrdup (args
);
1707 while (*args
!= '\000')
1709 /* Any leading spaces? */
1710 while (isspace (*args
))
1713 /* Point arg to the beginning of the argument. */
1716 /* Move args pointer over the argument. */
1717 while ((*args
!= '\000') && !isspace (*args
))
1720 /* If there are more arguments, terminate arg and
1722 if (*args
!= '\000')
1725 /* Now process the argument. */
1728 /* The first argument is the file name. */
1729 filename
= tilde_expand (arg
);
1730 make_cleanup (xfree
, filename
);
1735 /* The second argument is always the text address at which
1736 to load the program. */
1737 sect_opts
[section_index
].name
= ".text";
1738 sect_opts
[section_index
].value
= arg
;
1739 if (++section_index
> num_sect_opts
)
1742 sect_opts
= ((struct sect_opt
*)
1743 xrealloc (sect_opts
,
1745 * sizeof (struct sect_opt
)));
1750 /* It's an option (starting with '-') or it's an argument
1755 if (strcmp (arg
, "-mapped") == 0)
1756 flags
|= OBJF_MAPPED
;
1758 if (strcmp (arg
, "-readnow") == 0)
1759 flags
|= OBJF_READNOW
;
1761 if (strcmp (arg
, "-s") == 0)
1763 expecting_sec_name
= 1;
1764 expecting_sec_addr
= 1;
1769 if (expecting_sec_name
)
1771 sect_opts
[section_index
].name
= arg
;
1772 expecting_sec_name
= 0;
1775 if (expecting_sec_addr
)
1777 sect_opts
[section_index
].value
= arg
;
1778 expecting_sec_addr
= 0;
1779 if (++section_index
> num_sect_opts
)
1782 sect_opts
= ((struct sect_opt
*)
1783 xrealloc (sect_opts
,
1785 * sizeof (struct sect_opt
)));
1789 error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*");
1795 /* Print the prompt for the query below. And save the arguments into
1796 a sect_addr_info structure to be passed around to other
1797 functions. We have to split this up into separate print
1798 statements because local_hex_string returns a local static
1801 printf_filtered ("add symbol table from file \"%s\" at\n", filename
);
1802 section_addrs
= alloc_section_addr_info (section_index
);
1803 make_cleanup (xfree
, section_addrs
);
1804 for (i
= 0; i
< section_index
; i
++)
1807 char *val
= sect_opts
[i
].value
;
1808 char *sec
= sect_opts
[i
].name
;
1810 val
= sect_opts
[i
].value
;
1811 if (val
[0] == '0' && val
[1] == 'x')
1812 addr
= strtoul (val
+2, NULL
, 16);
1814 addr
= strtoul (val
, NULL
, 10);
1816 /* Here we store the section offsets in the order they were
1817 entered on the command line. */
1818 section_addrs
->other
[sec_num
].name
= sec
;
1819 section_addrs
->other
[sec_num
].addr
= addr
;
1820 printf_filtered ("\t%s_addr = %s\n",
1822 local_hex_string ((unsigned long)addr
));
1825 /* The object's sections are initialized when a
1826 call is made to build_objfile_section_table (objfile).
1827 This happens in reread_symbols.
1828 At this point, we don't know what file type this is,
1829 so we can't determine what section names are valid. */
1832 if (from_tty
&& (!query ("%s", "")))
1833 error ("Not confirmed.");
1835 symbol_file_add (filename
, from_tty
, section_addrs
, 0, flags
);
1837 /* Getting new symbols may change our opinion about what is
1839 reinit_frame_cache ();
1840 do_cleanups (my_cleanups
);
1844 add_shared_symbol_files_command (char *args
, int from_tty
)
1846 #ifdef ADD_SHARED_SYMBOL_FILES
1847 ADD_SHARED_SYMBOL_FILES (args
, from_tty
);
1849 error ("This command is not available in this configuration of GDB.");
1853 /* Re-read symbols if a symbol-file has changed. */
1855 reread_symbols (void)
1857 struct objfile
*objfile
;
1860 struct stat new_statbuf
;
1863 /* With the addition of shared libraries, this should be modified,
1864 the load time should be saved in the partial symbol tables, since
1865 different tables may come from different source files. FIXME.
1866 This routine should then walk down each partial symbol table
1867 and see if the symbol table that it originates from has been changed */
1869 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
1873 #ifdef IBM6000_TARGET
1874 /* If this object is from a shared library, then you should
1875 stat on the library name, not member name. */
1877 if (objfile
->obfd
->my_archive
)
1878 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
1881 res
= stat (objfile
->name
, &new_statbuf
);
1884 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1885 printf_filtered ("`%s' has disappeared; keeping its symbols.\n",
1889 new_modtime
= new_statbuf
.st_mtime
;
1890 if (new_modtime
!= objfile
->mtime
)
1892 struct cleanup
*old_cleanups
;
1893 struct section_offsets
*offsets
;
1895 char *obfd_filename
;
1897 printf_filtered ("`%s' has changed; re-reading symbols.\n",
1900 /* There are various functions like symbol_file_add,
1901 symfile_bfd_open, syms_from_objfile, etc., which might
1902 appear to do what we want. But they have various other
1903 effects which we *don't* want. So we just do stuff
1904 ourselves. We don't worry about mapped files (for one thing,
1905 any mapped file will be out of date). */
1907 /* If we get an error, blow away this objfile (not sure if
1908 that is the correct response for things like shared
1910 old_cleanups
= make_cleanup_free_objfile (objfile
);
1911 /* We need to do this whenever any symbols go away. */
1912 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
1914 /* Clean up any state BFD has sitting around. We don't need
1915 to close the descriptor but BFD lacks a way of closing the
1916 BFD without closing the descriptor. */
1917 obfd_filename
= bfd_get_filename (objfile
->obfd
);
1918 if (!bfd_close (objfile
->obfd
))
1919 error ("Can't close BFD for %s: %s", objfile
->name
,
1920 bfd_errmsg (bfd_get_error ()));
1921 objfile
->obfd
= bfd_openr (obfd_filename
, gnutarget
);
1922 if (objfile
->obfd
== NULL
)
1923 error ("Can't open %s to read symbols.", objfile
->name
);
1924 /* bfd_openr sets cacheable to true, which is what we want. */
1925 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
1926 error ("Can't read symbols from %s: %s.", objfile
->name
,
1927 bfd_errmsg (bfd_get_error ()));
1929 /* Save the offsets, we will nuke them with the rest of the
1931 num_offsets
= objfile
->num_sections
;
1932 offsets
= ((struct section_offsets
*)
1933 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
1934 memcpy (offsets
, objfile
->section_offsets
,
1935 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
1937 /* Nuke all the state that we will re-read. Much of the following
1938 code which sets things to NULL really is necessary to tell
1939 other parts of GDB that there is nothing currently there. */
1941 /* FIXME: Do we have to free a whole linked list, or is this
1943 if (objfile
->global_psymbols
.list
)
1944 xmfree (objfile
->md
, objfile
->global_psymbols
.list
);
1945 memset (&objfile
->global_psymbols
, 0,
1946 sizeof (objfile
->global_psymbols
));
1947 if (objfile
->static_psymbols
.list
)
1948 xmfree (objfile
->md
, objfile
->static_psymbols
.list
);
1949 memset (&objfile
->static_psymbols
, 0,
1950 sizeof (objfile
->static_psymbols
));
1952 /* Free the obstacks for non-reusable objfiles */
1953 bcache_xfree (objfile
->psymbol_cache
);
1954 objfile
->psymbol_cache
= bcache_xmalloc ();
1955 bcache_xfree (objfile
->macro_cache
);
1956 objfile
->macro_cache
= bcache_xmalloc ();
1957 if (objfile
->demangled_names_hash
!= NULL
)
1959 htab_delete (objfile
->demangled_names_hash
);
1960 objfile
->demangled_names_hash
= NULL
;
1962 obstack_free (&objfile
->psymbol_obstack
, 0);
1963 obstack_free (&objfile
->symbol_obstack
, 0);
1964 obstack_free (&objfile
->type_obstack
, 0);
1965 objfile
->sections
= NULL
;
1966 objfile
->symtabs
= NULL
;
1967 objfile
->psymtabs
= NULL
;
1968 objfile
->free_psymtabs
= NULL
;
1969 objfile
->msymbols
= NULL
;
1970 objfile
->minimal_symbol_count
= 0;
1971 memset (&objfile
->msymbol_hash
, 0,
1972 sizeof (objfile
->msymbol_hash
));
1973 memset (&objfile
->msymbol_demangled_hash
, 0,
1974 sizeof (objfile
->msymbol_demangled_hash
));
1975 objfile
->fundamental_types
= NULL
;
1976 if (objfile
->sf
!= NULL
)
1978 (*objfile
->sf
->sym_finish
) (objfile
);
1981 /* We never make this a mapped file. */
1983 /* obstack_specify_allocation also initializes the obstack so
1985 objfile
->psymbol_cache
= bcache_xmalloc ();
1986 objfile
->macro_cache
= bcache_xmalloc ();
1987 obstack_specify_allocation (&objfile
->psymbol_obstack
, 0, 0,
1989 obstack_specify_allocation (&objfile
->symbol_obstack
, 0, 0,
1991 obstack_specify_allocation (&objfile
->type_obstack
, 0, 0,
1993 if (build_objfile_section_table (objfile
))
1995 error ("Can't find the file sections in `%s': %s",
1996 objfile
->name
, bfd_errmsg (bfd_get_error ()));
1998 terminate_minimal_symbol_table (objfile
);
2000 /* We use the same section offsets as from last time. I'm not
2001 sure whether that is always correct for shared libraries. */
2002 objfile
->section_offsets
= (struct section_offsets
*)
2003 obstack_alloc (&objfile
->psymbol_obstack
,
2004 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2005 memcpy (objfile
->section_offsets
, offsets
,
2006 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2007 objfile
->num_sections
= num_offsets
;
2009 /* What the hell is sym_new_init for, anyway? The concept of
2010 distinguishing between the main file and additional files
2011 in this way seems rather dubious. */
2012 if (objfile
== symfile_objfile
)
2014 (*objfile
->sf
->sym_new_init
) (objfile
);
2016 RESET_HP_UX_GLOBALS ();
2020 (*objfile
->sf
->sym_init
) (objfile
);
2021 clear_complaints (&symfile_complaints
, 1, 1);
2022 /* The "mainline" parameter is a hideous hack; I think leaving it
2023 zero is OK since dbxread.c also does what it needs to do if
2024 objfile->global_psymbols.size is 0. */
2025 (*objfile
->sf
->sym_read
) (objfile
, 0);
2026 if (!have_partial_symbols () && !have_full_symbols ())
2029 printf_filtered ("(no debugging symbols found)\n");
2032 objfile
->flags
|= OBJF_SYMS
;
2034 /* We're done reading the symbol file; finish off complaints. */
2035 clear_complaints (&symfile_complaints
, 0, 1);
2037 /* Getting new symbols may change our opinion about what is
2040 reinit_frame_cache ();
2042 /* Discard cleanups as symbol reading was successful. */
2043 discard_cleanups (old_cleanups
);
2045 /* If the mtime has changed between the time we set new_modtime
2046 and now, we *want* this to be out of date, so don't call stat
2048 objfile
->mtime
= new_modtime
;
2050 reread_separate_symbols (objfile
);
2056 clear_symtab_users ();
2060 /* Handle separate debug info for OBJFILE, which has just been
2062 - If we had separate debug info before, but now we don't, get rid
2063 of the separated objfile.
2064 - If we didn't have separated debug info before, but now we do,
2065 read in the new separated debug info file.
2066 - If the debug link points to a different file, toss the old one
2067 and read the new one.
2068 This function does *not* handle the case where objfile is still
2069 using the same separate debug info file, but that file's timestamp
2070 has changed. That case should be handled by the loop in
2071 reread_symbols already. */
2073 reread_separate_symbols (struct objfile
*objfile
)
2076 unsigned long crc32
;
2078 /* Does the updated objfile's debug info live in a
2080 debug_file
= find_separate_debug_file (objfile
);
2082 if (objfile
->separate_debug_objfile
)
2084 /* There are two cases where we need to get rid of
2085 the old separated debug info objfile:
2086 - if the new primary objfile doesn't have
2087 separated debug info, or
2088 - if the new primary objfile has separate debug
2089 info, but it's under a different filename.
2091 If the old and new objfiles both have separate
2092 debug info, under the same filename, then we're
2093 okay --- if the separated file's contents have
2094 changed, we will have caught that when we
2095 visited it in this function's outermost
2098 || strcmp (debug_file
, objfile
->separate_debug_objfile
->name
) != 0)
2099 free_objfile (objfile
->separate_debug_objfile
);
2102 /* If the new objfile has separate debug info, and we
2103 haven't loaded it already, do so now. */
2105 && ! objfile
->separate_debug_objfile
)
2107 /* Use the same section offset table as objfile itself.
2108 Preserve the flags from objfile that make sense. */
2109 objfile
->separate_debug_objfile
2110 = (symbol_file_add_with_addrs_or_offsets
2112 info_verbose
, /* from_tty: Don't override the default. */
2113 0, /* No addr table. */
2114 objfile
->section_offsets
, objfile
->num_sections
,
2115 0, /* Not mainline. See comments about this above. */
2116 objfile
->flags
& (OBJF_MAPPED
| OBJF_REORDERED
2117 | OBJF_SHARED
| OBJF_READNOW
2118 | OBJF_USERLOADED
)));
2119 objfile
->separate_debug_objfile
->separate_debug_objfile_backlink
2135 static filename_language
*filename_language_table
;
2136 static int fl_table_size
, fl_table_next
;
2139 add_filename_language (char *ext
, enum language lang
)
2141 if (fl_table_next
>= fl_table_size
)
2143 fl_table_size
+= 10;
2144 filename_language_table
=
2145 xrealloc (filename_language_table
,
2146 fl_table_size
* sizeof (*filename_language_table
));
2149 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2150 filename_language_table
[fl_table_next
].lang
= lang
;
2154 static char *ext_args
;
2157 set_ext_lang_command (char *args
, int from_tty
)
2160 char *cp
= ext_args
;
2163 /* First arg is filename extension, starting with '.' */
2165 error ("'%s': Filename extension must begin with '.'", ext_args
);
2167 /* Find end of first arg. */
2168 while (*cp
&& !isspace (*cp
))
2172 error ("'%s': two arguments required -- filename extension and language",
2175 /* Null-terminate first arg */
2178 /* Find beginning of second arg, which should be a source language. */
2179 while (*cp
&& isspace (*cp
))
2183 error ("'%s': two arguments required -- filename extension and language",
2186 /* Lookup the language from among those we know. */
2187 lang
= language_enum (cp
);
2189 /* Now lookup the filename extension: do we already know it? */
2190 for (i
= 0; i
< fl_table_next
; i
++)
2191 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2194 if (i
>= fl_table_next
)
2196 /* new file extension */
2197 add_filename_language (ext_args
, lang
);
2201 /* redefining a previously known filename extension */
2204 /* query ("Really make files of type %s '%s'?", */
2205 /* ext_args, language_str (lang)); */
2207 xfree (filename_language_table
[i
].ext
);
2208 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2209 filename_language_table
[i
].lang
= lang
;
2214 info_ext_lang_command (char *args
, int from_tty
)
2218 printf_filtered ("Filename extensions and the languages they represent:");
2219 printf_filtered ("\n\n");
2220 for (i
= 0; i
< fl_table_next
; i
++)
2221 printf_filtered ("\t%s\t- %s\n",
2222 filename_language_table
[i
].ext
,
2223 language_str (filename_language_table
[i
].lang
));
2227 init_filename_language_table (void)
2229 if (fl_table_size
== 0) /* protect against repetition */
2233 filename_language_table
=
2234 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
2235 add_filename_language (".c", language_c
);
2236 add_filename_language (".C", language_cplus
);
2237 add_filename_language (".cc", language_cplus
);
2238 add_filename_language (".cp", language_cplus
);
2239 add_filename_language (".cpp", language_cplus
);
2240 add_filename_language (".cxx", language_cplus
);
2241 add_filename_language (".c++", language_cplus
);
2242 add_filename_language (".java", language_java
);
2243 add_filename_language (".class", language_java
);
2244 add_filename_language (".m", language_objc
);
2245 add_filename_language (".f", language_fortran
);
2246 add_filename_language (".F", language_fortran
);
2247 add_filename_language (".s", language_asm
);
2248 add_filename_language (".S", language_asm
);
2249 add_filename_language (".pas", language_pascal
);
2250 add_filename_language (".p", language_pascal
);
2251 add_filename_language (".pp", language_pascal
);
2256 deduce_language_from_filename (char *filename
)
2261 if (filename
!= NULL
)
2262 if ((cp
= strrchr (filename
, '.')) != NULL
)
2263 for (i
= 0; i
< fl_table_next
; i
++)
2264 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2265 return filename_language_table
[i
].lang
;
2267 return language_unknown
;
2272 Allocate and partly initialize a new symbol table. Return a pointer
2273 to it. error() if no space.
2275 Caller must set these fields:
2281 possibly free_named_symtabs (symtab->filename);
2285 allocate_symtab (char *filename
, struct objfile
*objfile
)
2287 register struct symtab
*symtab
;
2289 symtab
= (struct symtab
*)
2290 obstack_alloc (&objfile
->symbol_obstack
, sizeof (struct symtab
));
2291 memset (symtab
, 0, sizeof (*symtab
));
2292 symtab
->filename
= obsavestring (filename
, strlen (filename
),
2293 &objfile
->symbol_obstack
);
2294 symtab
->fullname
= NULL
;
2295 symtab
->language
= deduce_language_from_filename (filename
);
2296 symtab
->debugformat
= obsavestring ("unknown", 7,
2297 &objfile
->symbol_obstack
);
2299 /* Hook it to the objfile it comes from */
2301 symtab
->objfile
= objfile
;
2302 symtab
->next
= objfile
->symtabs
;
2303 objfile
->symtabs
= symtab
;
2305 /* FIXME: This should go away. It is only defined for the Z8000,
2306 and the Z8000 definition of this macro doesn't have anything to
2307 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
2308 here for convenience. */
2309 #ifdef INIT_EXTRA_SYMTAB_INFO
2310 INIT_EXTRA_SYMTAB_INFO (symtab
);
2316 struct partial_symtab
*
2317 allocate_psymtab (char *filename
, struct objfile
*objfile
)
2319 struct partial_symtab
*psymtab
;
2321 if (objfile
->free_psymtabs
)
2323 psymtab
= objfile
->free_psymtabs
;
2324 objfile
->free_psymtabs
= psymtab
->next
;
2327 psymtab
= (struct partial_symtab
*)
2328 obstack_alloc (&objfile
->psymbol_obstack
,
2329 sizeof (struct partial_symtab
));
2331 memset (psymtab
, 0, sizeof (struct partial_symtab
));
2332 psymtab
->filename
= obsavestring (filename
, strlen (filename
),
2333 &objfile
->psymbol_obstack
);
2334 psymtab
->symtab
= NULL
;
2336 /* Prepend it to the psymtab list for the objfile it belongs to.
2337 Psymtabs are searched in most recent inserted -> least recent
2340 psymtab
->objfile
= objfile
;
2341 psymtab
->next
= objfile
->psymtabs
;
2342 objfile
->psymtabs
= psymtab
;
2345 struct partial_symtab
**prev_pst
;
2346 psymtab
->objfile
= objfile
;
2347 psymtab
->next
= NULL
;
2348 prev_pst
= &(objfile
->psymtabs
);
2349 while ((*prev_pst
) != NULL
)
2350 prev_pst
= &((*prev_pst
)->next
);
2351 (*prev_pst
) = psymtab
;
2359 discard_psymtab (struct partial_symtab
*pst
)
2361 struct partial_symtab
**prev_pst
;
2364 Empty psymtabs happen as a result of header files which don't
2365 have any symbols in them. There can be a lot of them. But this
2366 check is wrong, in that a psymtab with N_SLINE entries but
2367 nothing else is not empty, but we don't realize that. Fixing
2368 that without slowing things down might be tricky. */
2370 /* First, snip it out of the psymtab chain */
2372 prev_pst
= &(pst
->objfile
->psymtabs
);
2373 while ((*prev_pst
) != pst
)
2374 prev_pst
= &((*prev_pst
)->next
);
2375 (*prev_pst
) = pst
->next
;
2377 /* Next, put it on a free list for recycling */
2379 pst
->next
= pst
->objfile
->free_psymtabs
;
2380 pst
->objfile
->free_psymtabs
= pst
;
2384 /* Reset all data structures in gdb which may contain references to symbol
2388 clear_symtab_users (void)
2390 /* Someday, we should do better than this, by only blowing away
2391 the things that really need to be blown. */
2392 clear_value_history ();
2394 clear_internalvars ();
2395 breakpoint_re_set ();
2396 set_default_breakpoint (0, 0, 0, 0);
2397 clear_current_source_symtab_and_line ();
2398 clear_pc_function_cache ();
2399 if (target_new_objfile_hook
)
2400 target_new_objfile_hook (NULL
);
2404 clear_symtab_users_cleanup (void *ignore
)
2406 clear_symtab_users ();
2409 /* clear_symtab_users_once:
2411 This function is run after symbol reading, or from a cleanup.
2412 If an old symbol table was obsoleted, the old symbol table
2413 has been blown away, but the other GDB data structures that may
2414 reference it have not yet been cleared or re-directed. (The old
2415 symtab was zapped, and the cleanup queued, in free_named_symtab()
2418 This function can be queued N times as a cleanup, or called
2419 directly; it will do all the work the first time, and then will be a
2420 no-op until the next time it is queued. This works by bumping a
2421 counter at queueing time. Much later when the cleanup is run, or at
2422 the end of symbol processing (in case the cleanup is discarded), if
2423 the queued count is greater than the "done-count", we do the work
2424 and set the done-count to the queued count. If the queued count is
2425 less than or equal to the done-count, we just ignore the call. This
2426 is needed because reading a single .o file will often replace many
2427 symtabs (one per .h file, for example), and we don't want to reset
2428 the breakpoints N times in the user's face.
2430 The reason we both queue a cleanup, and call it directly after symbol
2431 reading, is because the cleanup protects us in case of errors, but is
2432 discarded if symbol reading is successful. */
2435 /* FIXME: As free_named_symtabs is currently a big noop this function
2436 is no longer needed. */
2437 static void clear_symtab_users_once (void);
2439 static int clear_symtab_users_queued
;
2440 static int clear_symtab_users_done
;
2443 clear_symtab_users_once (void)
2445 /* Enforce once-per-`do_cleanups'-semantics */
2446 if (clear_symtab_users_queued
<= clear_symtab_users_done
)
2448 clear_symtab_users_done
= clear_symtab_users_queued
;
2450 clear_symtab_users ();
2454 /* Delete the specified psymtab, and any others that reference it. */
2457 cashier_psymtab (struct partial_symtab
*pst
)
2459 struct partial_symtab
*ps
, *pprev
= NULL
;
2462 /* Find its previous psymtab in the chain */
2463 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2472 /* Unhook it from the chain. */
2473 if (ps
== pst
->objfile
->psymtabs
)
2474 pst
->objfile
->psymtabs
= ps
->next
;
2476 pprev
->next
= ps
->next
;
2478 /* FIXME, we can't conveniently deallocate the entries in the
2479 partial_symbol lists (global_psymbols/static_psymbols) that
2480 this psymtab points to. These just take up space until all
2481 the psymtabs are reclaimed. Ditto the dependencies list and
2482 filename, which are all in the psymbol_obstack. */
2484 /* We need to cashier any psymtab that has this one as a dependency... */
2486 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2488 for (i
= 0; i
< ps
->number_of_dependencies
; i
++)
2490 if (ps
->dependencies
[i
] == pst
)
2492 cashier_psymtab (ps
);
2493 goto again
; /* Must restart, chain has been munged. */
2500 /* If a symtab or psymtab for filename NAME is found, free it along
2501 with any dependent breakpoints, displays, etc.
2502 Used when loading new versions of object modules with the "add-file"
2503 command. This is only called on the top-level symtab or psymtab's name;
2504 it is not called for subsidiary files such as .h files.
2506 Return value is 1 if we blew away the environment, 0 if not.
2507 FIXME. The return value appears to never be used.
2509 FIXME. I think this is not the best way to do this. We should
2510 work on being gentler to the environment while still cleaning up
2511 all stray pointers into the freed symtab. */
2514 free_named_symtabs (char *name
)
2517 /* FIXME: With the new method of each objfile having it's own
2518 psymtab list, this function needs serious rethinking. In particular,
2519 why was it ever necessary to toss psymtabs with specific compilation
2520 unit filenames, as opposed to all psymtabs from a particular symbol
2522 Well, the answer is that some systems permit reloading of particular
2523 compilation units. We want to blow away any old info about these
2524 compilation units, regardless of which objfiles they arrived in. --gnu. */
2526 register struct symtab
*s
;
2527 register struct symtab
*prev
;
2528 register struct partial_symtab
*ps
;
2529 struct blockvector
*bv
;
2532 /* We only wack things if the symbol-reload switch is set. */
2533 if (!symbol_reloading
)
2536 /* Some symbol formats have trouble providing file names... */
2537 if (name
== 0 || *name
== '\0')
2540 /* Look for a psymtab with the specified name. */
2543 for (ps
= partial_symtab_list
; ps
; ps
= ps
->next
)
2545 if (STREQ (name
, ps
->filename
))
2547 cashier_psymtab (ps
); /* Blow it away...and its little dog, too. */
2548 goto again2
; /* Must restart, chain has been munged */
2552 /* Look for a symtab with the specified name. */
2554 for (s
= symtab_list
; s
; s
= s
->next
)
2556 if (STREQ (name
, s
->filename
))
2563 if (s
== symtab_list
)
2564 symtab_list
= s
->next
;
2566 prev
->next
= s
->next
;
2568 /* For now, queue a delete for all breakpoints, displays, etc., whether
2569 or not they depend on the symtab being freed. This should be
2570 changed so that only those data structures affected are deleted. */
2572 /* But don't delete anything if the symtab is empty.
2573 This test is necessary due to a bug in "dbxread.c" that
2574 causes empty symtabs to be created for N_SO symbols that
2575 contain the pathname of the object file. (This problem
2576 has been fixed in GDB 3.9x). */
2578 bv
= BLOCKVECTOR (s
);
2579 if (BLOCKVECTOR_NBLOCKS (bv
) > 2
2580 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
))
2581 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)))
2583 complaint (&symfile_complaints
, "Replacing old symbols for `%s'",
2585 clear_symtab_users_queued
++;
2586 make_cleanup (clear_symtab_users_once
, 0);
2591 complaint (&symfile_complaints
, "Empty symbol table found for `%s'",
2599 /* It is still possible that some breakpoints will be affected
2600 even though no symtab was found, since the file might have
2601 been compiled without debugging, and hence not be associated
2602 with a symtab. In order to handle this correctly, we would need
2603 to keep a list of text address ranges for undebuggable files.
2604 For now, we do nothing, since this is a fairly obscure case. */
2608 /* FIXME, what about the minimal symbol table? */
2615 /* Allocate and partially fill a partial symtab. It will be
2616 completely filled at the end of the symbol list.
2618 FILENAME is the name of the symbol-file we are reading from. */
2620 struct partial_symtab
*
2621 start_psymtab_common (struct objfile
*objfile
,
2622 struct section_offsets
*section_offsets
, char *filename
,
2623 CORE_ADDR textlow
, struct partial_symbol
**global_syms
,
2624 struct partial_symbol
**static_syms
)
2626 struct partial_symtab
*psymtab
;
2628 psymtab
= allocate_psymtab (filename
, objfile
);
2629 psymtab
->section_offsets
= section_offsets
;
2630 psymtab
->textlow
= textlow
;
2631 psymtab
->texthigh
= psymtab
->textlow
; /* default */
2632 psymtab
->globals_offset
= global_syms
- objfile
->global_psymbols
.list
;
2633 psymtab
->statics_offset
= static_syms
- objfile
->static_psymbols
.list
;
2637 /* Add a symbol with a long value to a psymtab.
2638 Since one arg is a struct, we pass in a ptr and deref it (sigh). */
2641 add_psymbol_to_list (char *name
, int namelength
, domain_enum domain
,
2642 enum address_class
class,
2643 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2644 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2645 enum language language
, struct objfile
*objfile
)
2647 register struct partial_symbol
*psym
;
2648 char *buf
= alloca (namelength
+ 1);
2649 /* psymbol is static so that there will be no uninitialized gaps in the
2650 structure which might contain random data, causing cache misses in
2652 static struct partial_symbol psymbol
;
2654 /* Create local copy of the partial symbol */
2655 memcpy (buf
, name
, namelength
);
2656 buf
[namelength
] = '\0';
2657 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2660 SYMBOL_VALUE (&psymbol
) = val
;
2664 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2666 SYMBOL_SECTION (&psymbol
) = 0;
2667 SYMBOL_LANGUAGE (&psymbol
) = language
;
2668 PSYMBOL_DOMAIN (&psymbol
) = domain
;
2669 PSYMBOL_CLASS (&psymbol
) = class;
2671 SYMBOL_SET_NAMES (&psymbol
, buf
, namelength
, objfile
);
2673 /* Stash the partial symbol away in the cache */
2674 psym
= bcache (&psymbol
, sizeof (struct partial_symbol
), objfile
->psymbol_cache
);
2676 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2677 if (list
->next
>= list
->list
+ list
->size
)
2679 extend_psymbol_list (list
, objfile
);
2681 *list
->next
++ = psym
;
2682 OBJSTAT (objfile
, n_psyms
++);
2685 /* Add a symbol with a long value to a psymtab. This differs from
2686 * add_psymbol_to_list above in taking both a mangled and a demangled
2690 add_psymbol_with_dem_name_to_list (char *name
, int namelength
, char *dem_name
,
2691 int dem_namelength
, domain_enum domain
,
2692 enum address_class
class,
2693 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2694 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2695 enum language language
,
2696 struct objfile
*objfile
)
2698 register struct partial_symbol
*psym
;
2699 char *buf
= alloca (namelength
+ 1);
2700 /* psymbol is static so that there will be no uninitialized gaps in the
2701 structure which might contain random data, causing cache misses in
2703 static struct partial_symbol psymbol
;
2705 /* Create local copy of the partial symbol */
2707 memcpy (buf
, name
, namelength
);
2708 buf
[namelength
] = '\0';
2709 DEPRECATED_SYMBOL_NAME (&psymbol
) = bcache (buf
, namelength
+ 1, objfile
->psymbol_cache
);
2711 buf
= alloca (dem_namelength
+ 1);
2712 memcpy (buf
, dem_name
, dem_namelength
);
2713 buf
[dem_namelength
] = '\0';
2718 case language_cplus
:
2719 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol
) =
2720 bcache (buf
, dem_namelength
+ 1, objfile
->psymbol_cache
);
2722 /* FIXME What should be done for the default case? Ignoring for now. */
2725 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2728 SYMBOL_VALUE (&psymbol
) = val
;
2732 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2734 SYMBOL_SECTION (&psymbol
) = 0;
2735 SYMBOL_LANGUAGE (&psymbol
) = language
;
2736 PSYMBOL_DOMAIN (&psymbol
) = domain
;
2737 PSYMBOL_CLASS (&psymbol
) = class;
2738 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2740 /* Stash the partial symbol away in the cache */
2741 psym
= bcache (&psymbol
, sizeof (struct partial_symbol
), objfile
->psymbol_cache
);
2743 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2744 if (list
->next
>= list
->list
+ list
->size
)
2746 extend_psymbol_list (list
, objfile
);
2748 *list
->next
++ = psym
;
2749 OBJSTAT (objfile
, n_psyms
++);
2752 /* Initialize storage for partial symbols. */
2755 init_psymbol_list (struct objfile
*objfile
, int total_symbols
)
2757 /* Free any previously allocated psymbol lists. */
2759 if (objfile
->global_psymbols
.list
)
2761 xmfree (objfile
->md
, objfile
->global_psymbols
.list
);
2763 if (objfile
->static_psymbols
.list
)
2765 xmfree (objfile
->md
, objfile
->static_psymbols
.list
);
2768 /* Current best guess is that approximately a twentieth
2769 of the total symbols (in a debugging file) are global or static
2772 objfile
->global_psymbols
.size
= total_symbols
/ 10;
2773 objfile
->static_psymbols
.size
= total_symbols
/ 10;
2775 if (objfile
->global_psymbols
.size
> 0)
2777 objfile
->global_psymbols
.next
=
2778 objfile
->global_psymbols
.list
= (struct partial_symbol
**)
2779 xmmalloc (objfile
->md
, (objfile
->global_psymbols
.size
2780 * sizeof (struct partial_symbol
*)));
2782 if (objfile
->static_psymbols
.size
> 0)
2784 objfile
->static_psymbols
.next
=
2785 objfile
->static_psymbols
.list
= (struct partial_symbol
**)
2786 xmmalloc (objfile
->md
, (objfile
->static_psymbols
.size
2787 * sizeof (struct partial_symbol
*)));
2792 The following code implements an abstraction for debugging overlay sections.
2794 The target model is as follows:
2795 1) The gnu linker will permit multiple sections to be mapped into the
2796 same VMA, each with its own unique LMA (or load address).
2797 2) It is assumed that some runtime mechanism exists for mapping the
2798 sections, one by one, from the load address into the VMA address.
2799 3) This code provides a mechanism for gdb to keep track of which
2800 sections should be considered to be mapped from the VMA to the LMA.
2801 This information is used for symbol lookup, and memory read/write.
2802 For instance, if a section has been mapped then its contents
2803 should be read from the VMA, otherwise from the LMA.
2805 Two levels of debugger support for overlays are available. One is
2806 "manual", in which the debugger relies on the user to tell it which
2807 overlays are currently mapped. This level of support is
2808 implemented entirely in the core debugger, and the information about
2809 whether a section is mapped is kept in the objfile->obj_section table.
2811 The second level of support is "automatic", and is only available if
2812 the target-specific code provides functionality to read the target's
2813 overlay mapping table, and translate its contents for the debugger
2814 (by updating the mapped state information in the obj_section tables).
2816 The interface is as follows:
2818 overlay map <name> -- tell gdb to consider this section mapped
2819 overlay unmap <name> -- tell gdb to consider this section unmapped
2820 overlay list -- list the sections that GDB thinks are mapped
2821 overlay read-target -- get the target's state of what's mapped
2822 overlay off/manual/auto -- set overlay debugging state
2823 Functional interface:
2824 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2825 section, return that section.
2826 find_pc_overlay(pc): find any overlay section that contains
2827 the pc, either in its VMA or its LMA
2828 overlay_is_mapped(sect): true if overlay is marked as mapped
2829 section_is_overlay(sect): true if section's VMA != LMA
2830 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2831 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2832 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2833 overlay_mapped_address(...): map an address from section's LMA to VMA
2834 overlay_unmapped_address(...): map an address from section's VMA to LMA
2835 symbol_overlayed_address(...): Return a "current" address for symbol:
2836 either in VMA or LMA depending on whether
2837 the symbol's section is currently mapped
2840 /* Overlay debugging state: */
2842 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2843 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
2845 /* Target vector for refreshing overlay mapped state */
2846 static void simple_overlay_update (struct obj_section
*);
2847 void (*target_overlay_update
) (struct obj_section
*) = simple_overlay_update
;
2849 /* Function: section_is_overlay (SECTION)
2850 Returns true if SECTION has VMA not equal to LMA, ie.
2851 SECTION is loaded at an address different from where it will "run". */
2854 section_is_overlay (asection
*section
)
2856 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2858 if (overlay_debugging
)
2859 if (section
&& section
->lma
!= 0 &&
2860 section
->vma
!= section
->lma
)
2866 /* Function: overlay_invalidate_all (void)
2867 Invalidate the mapped state of all overlay sections (mark it as stale). */
2870 overlay_invalidate_all (void)
2872 struct objfile
*objfile
;
2873 struct obj_section
*sect
;
2875 ALL_OBJSECTIONS (objfile
, sect
)
2876 if (section_is_overlay (sect
->the_bfd_section
))
2877 sect
->ovly_mapped
= -1;
2880 /* Function: overlay_is_mapped (SECTION)
2881 Returns true if section is an overlay, and is currently mapped.
2882 Private: public access is thru function section_is_mapped.
2884 Access to the ovly_mapped flag is restricted to this function, so
2885 that we can do automatic update. If the global flag
2886 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2887 overlay_invalidate_all. If the mapped state of the particular
2888 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2891 overlay_is_mapped (struct obj_section
*osect
)
2893 if (osect
== 0 || !section_is_overlay (osect
->the_bfd_section
))
2896 switch (overlay_debugging
)
2900 return 0; /* overlay debugging off */
2901 case ovly_auto
: /* overlay debugging automatic */
2902 /* Unles there is a target_overlay_update function,
2903 there's really nothing useful to do here (can't really go auto) */
2904 if (target_overlay_update
)
2906 if (overlay_cache_invalid
)
2908 overlay_invalidate_all ();
2909 overlay_cache_invalid
= 0;
2911 if (osect
->ovly_mapped
== -1)
2912 (*target_overlay_update
) (osect
);
2914 /* fall thru to manual case */
2915 case ovly_on
: /* overlay debugging manual */
2916 return osect
->ovly_mapped
== 1;
2920 /* Function: section_is_mapped
2921 Returns true if section is an overlay, and is currently mapped. */
2924 section_is_mapped (asection
*section
)
2926 struct objfile
*objfile
;
2927 struct obj_section
*osect
;
2929 if (overlay_debugging
)
2930 if (section
&& section_is_overlay (section
))
2931 ALL_OBJSECTIONS (objfile
, osect
)
2932 if (osect
->the_bfd_section
== section
)
2933 return overlay_is_mapped (osect
);
2938 /* Function: pc_in_unmapped_range
2939 If PC falls into the lma range of SECTION, return true, else false. */
2942 pc_in_unmapped_range (CORE_ADDR pc
, asection
*section
)
2944 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2948 if (overlay_debugging
)
2949 if (section
&& section_is_overlay (section
))
2951 size
= bfd_get_section_size_before_reloc (section
);
2952 if (section
->lma
<= pc
&& pc
< section
->lma
+ size
)
2958 /* Function: pc_in_mapped_range
2959 If PC falls into the vma range of SECTION, return true, else false. */
2962 pc_in_mapped_range (CORE_ADDR pc
, asection
*section
)
2964 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2968 if (overlay_debugging
)
2969 if (section
&& section_is_overlay (section
))
2971 size
= bfd_get_section_size_before_reloc (section
);
2972 if (section
->vma
<= pc
&& pc
< section
->vma
+ size
)
2979 /* Return true if the mapped ranges of sections A and B overlap, false
2982 sections_overlap (asection
*a
, asection
*b
)
2984 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2986 CORE_ADDR a_start
= a
->vma
;
2987 CORE_ADDR a_end
= a
->vma
+ bfd_get_section_size_before_reloc (a
);
2988 CORE_ADDR b_start
= b
->vma
;
2989 CORE_ADDR b_end
= b
->vma
+ bfd_get_section_size_before_reloc (b
);
2991 return (a_start
< b_end
&& b_start
< a_end
);
2994 /* Function: overlay_unmapped_address (PC, SECTION)
2995 Returns the address corresponding to PC in the unmapped (load) range.
2996 May be the same as PC. */
2999 overlay_unmapped_address (CORE_ADDR pc
, asection
*section
)
3001 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
3003 if (overlay_debugging
)
3004 if (section
&& section_is_overlay (section
) &&
3005 pc_in_mapped_range (pc
, section
))
3006 return pc
+ section
->lma
- section
->vma
;
3011 /* Function: overlay_mapped_address (PC, SECTION)
3012 Returns the address corresponding to PC in the mapped (runtime) range.
3013 May be the same as PC. */
3016 overlay_mapped_address (CORE_ADDR pc
, asection
*section
)
3018 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3020 if (overlay_debugging
)
3021 if (section
&& section_is_overlay (section
) &&
3022 pc_in_unmapped_range (pc
, section
))
3023 return pc
+ section
->vma
- section
->lma
;
3029 /* Function: symbol_overlayed_address
3030 Return one of two addresses (relative to the VMA or to the LMA),
3031 depending on whether the section is mapped or not. */
3034 symbol_overlayed_address (CORE_ADDR address
, asection
*section
)
3036 if (overlay_debugging
)
3038 /* If the symbol has no section, just return its regular address. */
3041 /* If the symbol's section is not an overlay, just return its address */
3042 if (!section_is_overlay (section
))
3044 /* If the symbol's section is mapped, just return its address */
3045 if (section_is_mapped (section
))
3048 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3049 * then return its LOADED address rather than its vma address!!
3051 return overlay_unmapped_address (address
, section
);
3056 /* Function: find_pc_overlay (PC)
3057 Return the best-match overlay section for PC:
3058 If PC matches a mapped overlay section's VMA, return that section.
3059 Else if PC matches an unmapped section's VMA, return that section.
3060 Else if PC matches an unmapped section's LMA, return that section. */
3063 find_pc_overlay (CORE_ADDR pc
)
3065 struct objfile
*objfile
;
3066 struct obj_section
*osect
, *best_match
= NULL
;
3068 if (overlay_debugging
)
3069 ALL_OBJSECTIONS (objfile
, osect
)
3070 if (section_is_overlay (osect
->the_bfd_section
))
3072 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
))
3074 if (overlay_is_mapped (osect
))
3075 return osect
->the_bfd_section
;
3079 else if (pc_in_unmapped_range (pc
, osect
->the_bfd_section
))
3082 return best_match
? best_match
->the_bfd_section
: NULL
;
3085 /* Function: find_pc_mapped_section (PC)
3086 If PC falls into the VMA address range of an overlay section that is
3087 currently marked as MAPPED, return that section. Else return NULL. */
3090 find_pc_mapped_section (CORE_ADDR pc
)
3092 struct objfile
*objfile
;
3093 struct obj_section
*osect
;
3095 if (overlay_debugging
)
3096 ALL_OBJSECTIONS (objfile
, osect
)
3097 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
) &&
3098 overlay_is_mapped (osect
))
3099 return osect
->the_bfd_section
;
3104 /* Function: list_overlays_command
3105 Print a list of mapped sections and their PC ranges */
3108 list_overlays_command (char *args
, int from_tty
)
3111 struct objfile
*objfile
;
3112 struct obj_section
*osect
;
3114 if (overlay_debugging
)
3115 ALL_OBJSECTIONS (objfile
, osect
)
3116 if (overlay_is_mapped (osect
))
3122 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3123 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3124 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3125 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3127 printf_filtered ("Section %s, loaded at ", name
);
3128 print_address_numeric (lma
, 1, gdb_stdout
);
3129 puts_filtered (" - ");
3130 print_address_numeric (lma
+ size
, 1, gdb_stdout
);
3131 printf_filtered (", mapped at ");
3132 print_address_numeric (vma
, 1, gdb_stdout
);
3133 puts_filtered (" - ");
3134 print_address_numeric (vma
+ size
, 1, gdb_stdout
);
3135 puts_filtered ("\n");
3140 printf_filtered ("No sections are mapped.\n");
3143 /* Function: map_overlay_command
3144 Mark the named section as mapped (ie. residing at its VMA address). */
3147 map_overlay_command (char *args
, int from_tty
)
3149 struct objfile
*objfile
, *objfile2
;
3150 struct obj_section
*sec
, *sec2
;
3153 if (!overlay_debugging
)
3155 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3156 the 'overlay manual' command.");
3158 if (args
== 0 || *args
== 0)
3159 error ("Argument required: name of an overlay section");
3161 /* First, find a section matching the user supplied argument */
3162 ALL_OBJSECTIONS (objfile
, sec
)
3163 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3165 /* Now, check to see if the section is an overlay. */
3166 bfdsec
= sec
->the_bfd_section
;
3167 if (!section_is_overlay (bfdsec
))
3168 continue; /* not an overlay section */
3170 /* Mark the overlay as "mapped" */
3171 sec
->ovly_mapped
= 1;
3173 /* Next, make a pass and unmap any sections that are
3174 overlapped by this new section: */
3175 ALL_OBJSECTIONS (objfile2
, sec2
)
3176 if (sec2
->ovly_mapped
3178 && sec
->the_bfd_section
!= sec2
->the_bfd_section
3179 && sections_overlap (sec
->the_bfd_section
,
3180 sec2
->the_bfd_section
))
3183 printf_filtered ("Note: section %s unmapped by overlap\n",
3184 bfd_section_name (objfile
->obfd
,
3185 sec2
->the_bfd_section
));
3186 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
3190 error ("No overlay section called %s", args
);
3193 /* Function: unmap_overlay_command
3194 Mark the overlay section as unmapped
3195 (ie. resident in its LMA address range, rather than the VMA range). */
3198 unmap_overlay_command (char *args
, int from_tty
)
3200 struct objfile
*objfile
;
3201 struct obj_section
*sec
;
3203 if (!overlay_debugging
)
3205 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3206 the 'overlay manual' command.");
3208 if (args
== 0 || *args
== 0)
3209 error ("Argument required: name of an overlay section");
3211 /* First, find a section matching the user supplied argument */
3212 ALL_OBJSECTIONS (objfile
, sec
)
3213 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3215 if (!sec
->ovly_mapped
)
3216 error ("Section %s is not mapped", args
);
3217 sec
->ovly_mapped
= 0;
3220 error ("No overlay section called %s", args
);
3223 /* Function: overlay_auto_command
3224 A utility command to turn on overlay debugging.
3225 Possibly this should be done via a set/show command. */
3228 overlay_auto_command (char *args
, int from_tty
)
3230 overlay_debugging
= ovly_auto
;
3231 enable_overlay_breakpoints ();
3233 printf_filtered ("Automatic overlay debugging enabled.");
3236 /* Function: overlay_manual_command
3237 A utility command to turn on overlay debugging.
3238 Possibly this should be done via a set/show command. */
3241 overlay_manual_command (char *args
, int from_tty
)
3243 overlay_debugging
= ovly_on
;
3244 disable_overlay_breakpoints ();
3246 printf_filtered ("Overlay debugging enabled.");
3249 /* Function: overlay_off_command
3250 A utility command to turn on overlay debugging.
3251 Possibly this should be done via a set/show command. */
3254 overlay_off_command (char *args
, int from_tty
)
3256 overlay_debugging
= ovly_off
;
3257 disable_overlay_breakpoints ();
3259 printf_filtered ("Overlay debugging disabled.");
3263 overlay_load_command (char *args
, int from_tty
)
3265 if (target_overlay_update
)
3266 (*target_overlay_update
) (NULL
);
3268 error ("This target does not know how to read its overlay state.");
3271 /* Function: overlay_command
3272 A place-holder for a mis-typed command */
3274 /* Command list chain containing all defined "overlay" subcommands. */
3275 struct cmd_list_element
*overlaylist
;
3278 overlay_command (char *args
, int from_tty
)
3281 ("\"overlay\" must be followed by the name of an overlay command.\n");
3282 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3286 /* Target Overlays for the "Simplest" overlay manager:
3288 This is GDB's default target overlay layer. It works with the
3289 minimal overlay manager supplied as an example by Cygnus. The
3290 entry point is via a function pointer "target_overlay_update",
3291 so targets that use a different runtime overlay manager can
3292 substitute their own overlay_update function and take over the
3295 The overlay_update function pokes around in the target's data structures
3296 to see what overlays are mapped, and updates GDB's overlay mapping with
3299 In this simple implementation, the target data structures are as follows:
3300 unsigned _novlys; /# number of overlay sections #/
3301 unsigned _ovly_table[_novlys][4] = {
3302 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3303 {..., ..., ..., ...},
3305 unsigned _novly_regions; /# number of overlay regions #/
3306 unsigned _ovly_region_table[_novly_regions][3] = {
3307 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3310 These functions will attempt to update GDB's mappedness state in the
3311 symbol section table, based on the target's mappedness state.
3313 To do this, we keep a cached copy of the target's _ovly_table, and
3314 attempt to detect when the cached copy is invalidated. The main
3315 entry point is "simple_overlay_update(SECT), which looks up SECT in
3316 the cached table and re-reads only the entry for that section from
3317 the target (whenever possible).
3320 /* Cached, dynamically allocated copies of the target data structures: */
3321 static unsigned (*cache_ovly_table
)[4] = 0;
3323 static unsigned (*cache_ovly_region_table
)[3] = 0;
3325 static unsigned cache_novlys
= 0;
3327 static unsigned cache_novly_regions
= 0;
3329 static CORE_ADDR cache_ovly_table_base
= 0;
3331 static CORE_ADDR cache_ovly_region_table_base
= 0;
3335 VMA
, SIZE
, LMA
, MAPPED
3337 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
3339 /* Throw away the cached copy of _ovly_table */
3341 simple_free_overlay_table (void)
3343 if (cache_ovly_table
)
3344 xfree (cache_ovly_table
);
3346 cache_ovly_table
= NULL
;
3347 cache_ovly_table_base
= 0;
3351 /* Throw away the cached copy of _ovly_region_table */
3353 simple_free_overlay_region_table (void)
3355 if (cache_ovly_region_table
)
3356 xfree (cache_ovly_region_table
);
3357 cache_novly_regions
= 0;
3358 cache_ovly_region_table
= NULL
;
3359 cache_ovly_region_table_base
= 0;
3363 /* Read an array of ints from the target into a local buffer.
3364 Convert to host order. int LEN is number of ints */
3366 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
, int len
)
3368 /* FIXME (alloca): Not safe if array is very large. */
3369 char *buf
= alloca (len
* TARGET_LONG_BYTES
);
3372 read_memory (memaddr
, buf
, len
* TARGET_LONG_BYTES
);
3373 for (i
= 0; i
< len
; i
++)
3374 myaddr
[i
] = extract_unsigned_integer (TARGET_LONG_BYTES
* i
+ buf
,
3378 /* Find and grab a copy of the target _ovly_table
3379 (and _novlys, which is needed for the table's size) */
3381 simple_read_overlay_table (void)
3383 struct minimal_symbol
*novlys_msym
, *ovly_table_msym
;
3385 simple_free_overlay_table ();
3386 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3389 error ("Error reading inferior's overlay table: "
3390 "couldn't find `_novlys' variable\n"
3391 "in inferior. Use `overlay manual' mode.");
3395 ovly_table_msym
= lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3396 if (! ovly_table_msym
)
3398 error ("Error reading inferior's overlay table: couldn't find "
3399 "`_ovly_table' array\n"
3400 "in inferior. Use `overlay manual' mode.");
3404 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
), 4);
3406 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3407 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3408 read_target_long_array (cache_ovly_table_base
,
3409 (int *) cache_ovly_table
,
3412 return 1; /* SUCCESS */
3416 /* Find and grab a copy of the target _ovly_region_table
3417 (and _novly_regions, which is needed for the table's size) */
3419 simple_read_overlay_region_table (void)
3421 struct minimal_symbol
*msym
;
3423 simple_free_overlay_region_table ();
3424 msym
= lookup_minimal_symbol ("_novly_regions", NULL
, NULL
);
3426 cache_novly_regions
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
3428 return 0; /* failure */
3429 cache_ovly_region_table
= (void *) xmalloc (cache_novly_regions
* 12);
3430 if (cache_ovly_region_table
!= NULL
)
3432 msym
= lookup_minimal_symbol ("_ovly_region_table", NULL
, NULL
);
3435 cache_ovly_region_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3436 read_target_long_array (cache_ovly_region_table_base
,
3437 (int *) cache_ovly_region_table
,
3438 cache_novly_regions
* 3);
3441 return 0; /* failure */
3444 return 0; /* failure */
3445 return 1; /* SUCCESS */
3449 /* Function: simple_overlay_update_1
3450 A helper function for simple_overlay_update. Assuming a cached copy
3451 of _ovly_table exists, look through it to find an entry whose vma,
3452 lma and size match those of OSECT. Re-read the entry and make sure
3453 it still matches OSECT (else the table may no longer be valid).
3454 Set OSECT's mapped state to match the entry. Return: 1 for
3455 success, 0 for failure. */
3458 simple_overlay_update_1 (struct obj_section
*osect
)
3461 bfd
*obfd
= osect
->objfile
->obfd
;
3462 asection
*bsect
= osect
->the_bfd_section
;
3464 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3465 for (i
= 0; i
< cache_novlys
; i
++)
3466 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3467 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3468 /* && cache_ovly_table[i][SIZE] == size */ )
3470 read_target_long_array (cache_ovly_table_base
+ i
* TARGET_LONG_BYTES
,
3471 (int *) cache_ovly_table
[i
], 4);
3472 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3473 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3474 /* && cache_ovly_table[i][SIZE] == size */ )
3476 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3479 else /* Warning! Warning! Target's ovly table has changed! */
3485 /* Function: simple_overlay_update
3486 If OSECT is NULL, then update all sections' mapped state
3487 (after re-reading the entire target _ovly_table).
3488 If OSECT is non-NULL, then try to find a matching entry in the
3489 cached ovly_table and update only OSECT's mapped state.
3490 If a cached entry can't be found or the cache isn't valid, then
3491 re-read the entire cache, and go ahead and update all sections. */
3494 simple_overlay_update (struct obj_section
*osect
)
3496 struct objfile
*objfile
;
3498 /* Were we given an osect to look up? NULL means do all of them. */
3500 /* Have we got a cached copy of the target's overlay table? */
3501 if (cache_ovly_table
!= NULL
)
3502 /* Does its cached location match what's currently in the symtab? */
3503 if (cache_ovly_table_base
==
3504 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL
, NULL
)))
3505 /* Then go ahead and try to look up this single section in the cache */
3506 if (simple_overlay_update_1 (osect
))
3507 /* Found it! We're done. */
3510 /* Cached table no good: need to read the entire table anew.
3511 Or else we want all the sections, in which case it's actually
3512 more efficient to read the whole table in one block anyway. */
3514 if (! simple_read_overlay_table ())
3517 /* Now may as well update all sections, even if only one was requested. */
3518 ALL_OBJSECTIONS (objfile
, osect
)
3519 if (section_is_overlay (osect
->the_bfd_section
))
3522 bfd
*obfd
= osect
->objfile
->obfd
;
3523 asection
*bsect
= osect
->the_bfd_section
;
3525 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3526 for (i
= 0; i
< cache_novlys
; i
++)
3527 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3528 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3529 /* && cache_ovly_table[i][SIZE] == size */ )
3530 { /* obj_section matches i'th entry in ovly_table */
3531 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3532 break; /* finished with inner for loop: break out */
3537 /* Set the output sections and output offsets for section SECTP in
3538 ABFD. The relocation code in BFD will read these offsets, so we
3539 need to be sure they're initialized. We map each section to itself,
3540 with no offset; this means that SECTP->vma will be honored. */
3543 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3545 sectp
->output_section
= sectp
;
3546 sectp
->output_offset
= 0;
3549 /* Relocate the contents of a debug section SECTP in ABFD. The
3550 contents are stored in BUF if it is non-NULL, or returned in a
3551 malloc'd buffer otherwise.
3553 For some platforms and debug info formats, shared libraries contain
3554 relocations against the debug sections (particularly for DWARF-2;
3555 one affected platform is PowerPC GNU/Linux, although it depends on
3556 the version of the linker in use). Also, ELF object files naturally
3557 have unresolved relocations for their debug sections. We need to apply
3558 the relocations in order to get the locations of symbols correct. */
3561 symfile_relocate_debug_section (bfd
*abfd
, asection
*sectp
, bfd_byte
*buf
)
3563 /* We're only interested in debugging sections with relocation
3565 if ((sectp
->flags
& SEC_RELOC
) == 0)
3567 if ((sectp
->flags
& SEC_DEBUGGING
) == 0)
3570 /* We will handle section offsets properly elsewhere, so relocate as if
3571 all sections begin at 0. */
3572 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3574 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3578 _initialize_symfile (void)
3580 struct cmd_list_element
*c
;
3582 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
,
3583 "Load symbol table from executable file FILE.\n\
3584 The `file' command can also load symbol tables, as well as setting the file\n\
3585 to execute.", &cmdlist
);
3586 set_cmd_completer (c
, filename_completer
);
3588 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
,
3589 "Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3590 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3591 ADDR is the starting address of the file's text.\n\
3592 The optional arguments are section-name section-address pairs and\n\
3593 should be specified if the data and bss segments are not contiguous\n\
3594 with the text. SECT is a section name to be loaded at SECT_ADDR.",
3596 set_cmd_completer (c
, filename_completer
);
3598 c
= add_cmd ("add-shared-symbol-files", class_files
,
3599 add_shared_symbol_files_command
,
3600 "Load the symbols from shared objects in the dynamic linker's link map.",
3602 c
= add_alias_cmd ("assf", "add-shared-symbol-files", class_files
, 1,
3605 c
= add_cmd ("load", class_files
, load_command
,
3606 "Dynamically load FILE into the running program, and record its symbols\n\
3607 for access from GDB.", &cmdlist
);
3608 set_cmd_completer (c
, filename_completer
);
3611 (add_set_cmd ("symbol-reloading", class_support
, var_boolean
,
3612 (char *) &symbol_reloading
,
3613 "Set dynamic symbol table reloading multiple times in one run.",
3617 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3618 "Commands for debugging overlays.", &overlaylist
,
3619 "overlay ", 0, &cmdlist
);
3621 add_com_alias ("ovly", "overlay", class_alias
, 1);
3622 add_com_alias ("ov", "overlay", class_alias
, 1);
3624 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3625 "Assert that an overlay section is mapped.", &overlaylist
);
3627 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3628 "Assert that an overlay section is unmapped.", &overlaylist
);
3630 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3631 "List mappings of overlay sections.", &overlaylist
);
3633 add_cmd ("manual", class_support
, overlay_manual_command
,
3634 "Enable overlay debugging.", &overlaylist
);
3635 add_cmd ("off", class_support
, overlay_off_command
,
3636 "Disable overlay debugging.", &overlaylist
);
3637 add_cmd ("auto", class_support
, overlay_auto_command
,
3638 "Enable automatic overlay debugging.", &overlaylist
);
3639 add_cmd ("load-target", class_support
, overlay_load_command
,
3640 "Read the overlay mapping state from the target.", &overlaylist
);
3642 /* Filename extension to source language lookup table: */
3643 init_filename_language_table ();
3644 c
= add_set_cmd ("extension-language", class_files
, var_string_noescape
,
3646 "Set mapping between filename extension and source language.\n\
3647 Usage: set extension-language .foo bar",
3649 set_cmd_cfunc (c
, set_ext_lang_command
);
3651 add_info ("extensions", info_ext_lang_command
,
3652 "All filename extensions associated with a source language.");
3655 (add_set_cmd ("download-write-size", class_obscure
,
3656 var_integer
, (char *) &download_write_size
,
3657 "Set the write size used when downloading a program.\n"
3658 "Only used when downloading a program onto a remote\n"
3659 "target. Specify zero, or a negative value, to disable\n"
3660 "blocked writes. The actual size of each transfer is also\n"
3661 "limited by the size of the target packet and the memory\n"
3666 debug_file_directory
= xstrdup (DEBUGDIR
);
3668 ("debug-file-directory", class_support
, var_string
,
3669 (char *) &debug_file_directory
,
3670 "Set the directory where separate debug symbols are searched for.\n"
3671 "Separate debug symbols are first searched for in the same\n"
3672 "directory as the binary, then in the `" DEBUG_SUBDIRECTORY
3674 "and lastly at the path of the directory of the binary with\n"
3675 "the global debug-file directory prepended\n",
3677 add_show_from_set (c
, &showlist
);
3678 set_cmd_completer (c
, filename_completer
);