1 /* Generic symbol file reading for the GNU debugger, GDB.
2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
3 2000, 2001 Free Software Foundation, Inc.
4 Contributed by Cygnus Support, using pieces from other GDB modules.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
33 #include "breakpoint.h"
35 #include "complaints.h"
37 #include "inferior.h" /* for write_pc */
38 #include "gdb-stabs.h"
40 #include "completer.h"
42 #include <sys/types.h>
44 #include "gdb_string.h"
55 /* Some HP-UX related globals to clear when a new "main"
56 symbol file is loaded. HP-specific. */
58 extern int hp_som_som_object_present
;
59 extern int hp_cxx_exception_support_initialized
;
60 #define RESET_HP_UX_GLOBALS() do {\
61 hp_som_som_object_present = 0; /* indicates HP-compiled code */ \
62 hp_cxx_exception_support_initialized = 0; /* must reinitialize exception stuff */ \
66 int (*ui_load_progress_hook
) (const char *section
, unsigned long num
);
67 void (*show_load_progress
) (const char *section
,
68 unsigned long section_sent
,
69 unsigned long section_size
,
70 unsigned long total_sent
,
71 unsigned long total_size
);
72 void (*pre_add_symbol_hook
) (char *);
73 void (*post_add_symbol_hook
) (void);
74 void (*target_new_objfile_hook
) (struct objfile
*);
76 static void clear_symtab_users_cleanup (void *ignore
);
78 /* Global variables owned by this file */
79 int readnow_symbol_files
; /* Read full symbols immediately */
81 struct complaint oldsyms_complaint
=
83 "Replacing old symbols for `%s'", 0, 0
86 struct complaint empty_symtab_complaint
=
88 "Empty symbol table found for `%s'", 0, 0
91 struct complaint unknown_option_complaint
=
93 "Unknown option `%s' ignored", 0, 0
96 /* External variables and functions referenced. */
98 extern int info_verbose
;
100 extern void report_transfer_performance (unsigned long, time_t, time_t);
102 /* Functions this file defines */
105 static int simple_read_overlay_region_table (void);
106 static void simple_free_overlay_region_table (void);
109 static void set_initial_language (void);
111 static void load_command (char *, int);
113 static void symbol_file_add_main_1 (char *args
, int from_tty
, int flags
);
115 static void add_symbol_file_command (char *, int);
117 static void add_shared_symbol_files_command (char *, int);
119 static void cashier_psymtab (struct partial_symtab
*);
121 bfd
*symfile_bfd_open (char *);
123 static void find_sym_fns (struct objfile
*);
125 static void decrement_reading_symtab (void *);
127 static void overlay_invalidate_all (void);
129 static int overlay_is_mapped (struct obj_section
*);
131 void list_overlays_command (char *, int);
133 void map_overlay_command (char *, int);
135 void unmap_overlay_command (char *, int);
137 static void overlay_auto_command (char *, int);
139 static void overlay_manual_command (char *, int);
141 static void overlay_off_command (char *, int);
143 static void overlay_load_command (char *, int);
145 static void overlay_command (char *, int);
147 static void simple_free_overlay_table (void);
149 static void read_target_long_array (CORE_ADDR
, unsigned int *, int);
151 static int simple_read_overlay_table (void);
153 static int simple_overlay_update_1 (struct obj_section
*);
155 static void add_filename_language (char *ext
, enum language lang
);
157 static void set_ext_lang_command (char *args
, int from_tty
);
159 static void info_ext_lang_command (char *args
, int from_tty
);
161 static void init_filename_language_table (void);
163 void _initialize_symfile (void);
165 /* List of all available sym_fns. On gdb startup, each object file reader
166 calls add_symtab_fns() to register information on each format it is
169 static struct sym_fns
*symtab_fns
= NULL
;
171 /* Flag for whether user will be reloading symbols multiple times.
172 Defaults to ON for VxWorks, otherwise OFF. */
174 #ifdef SYMBOL_RELOADING_DEFAULT
175 int symbol_reloading
= SYMBOL_RELOADING_DEFAULT
;
177 int symbol_reloading
= 0;
180 /* If non-zero, then on HP-UX (i.e., platforms that use somsolib.c),
181 this variable is interpreted as a threshhold. If adding a new
182 library's symbol table to those already known to the debugger would
183 exceed this threshhold, then the shlib's symbols are not added.
185 If non-zero on other platforms, shared library symbols will be added
186 automatically when the inferior is created, new libraries are loaded,
187 or when attaching to the inferior. This is almost always what users
188 will want to have happen; but for very large programs, the startup
189 time will be excessive, and so if this is a problem, the user can
190 clear this flag and then add the shared library symbols as needed.
191 Note that there is a potential for confusion, since if the shared
192 library symbols are not loaded, commands like "info fun" will *not*
193 report all the functions that are actually present.
195 Note that HP-UX interprets this variable to mean, "threshhold size
196 in megabytes, where zero means never add". Other platforms interpret
197 this variable to mean, "always add if non-zero, never add if zero."
200 int auto_solib_add
= 1;
203 /* Since this function is called from within qsort, in an ANSI environment
204 it must conform to the prototype for qsort, which specifies that the
205 comparison function takes two "void *" pointers. */
208 compare_symbols (const void *s1p
, const void *s2p
)
210 register struct symbol
**s1
, **s2
;
212 s1
= (struct symbol
**) s1p
;
213 s2
= (struct symbol
**) s2p
;
214 return (strcmp (SYMBOL_SOURCE_NAME (*s1
), SYMBOL_SOURCE_NAME (*s2
)));
221 compare_psymbols -- compare two partial symbols by name
225 Given pointers to pointers to two partial symbol table entries,
226 compare them by name and return -N, 0, or +N (ala strcmp).
227 Typically used by sorting routines like qsort().
231 Does direct compare of first two characters before punting
232 and passing to strcmp for longer compares. Note that the
233 original version had a bug whereby two null strings or two
234 identically named one character strings would return the
235 comparison of memory following the null byte.
240 compare_psymbols (const void *s1p
, const void *s2p
)
242 register struct partial_symbol
**s1
, **s2
;
243 register char *st1
, *st2
;
245 s1
= (struct partial_symbol
**) s1p
;
246 s2
= (struct partial_symbol
**) s2p
;
247 st1
= SYMBOL_SOURCE_NAME (*s1
);
248 st2
= SYMBOL_SOURCE_NAME (*s2
);
251 if ((st1
[0] - st2
[0]) || !st1
[0])
253 return (st1
[0] - st2
[0]);
255 else if ((st1
[1] - st2
[1]) || !st1
[1])
257 return (st1
[1] - st2
[1]);
261 return (strcmp (st1
, st2
));
266 sort_pst_symbols (struct partial_symtab
*pst
)
268 /* Sort the global list; don't sort the static list */
270 qsort (pst
->objfile
->global_psymbols
.list
+ pst
->globals_offset
,
271 pst
->n_global_syms
, sizeof (struct partial_symbol
*),
275 /* Call sort_block_syms to sort alphabetically the symbols of one block. */
278 sort_block_syms (register struct block
*b
)
280 qsort (&BLOCK_SYM (b
, 0), BLOCK_NSYMS (b
),
281 sizeof (struct symbol
*), compare_symbols
);
284 /* Call sort_symtab_syms to sort alphabetically
285 the symbols of each block of one symtab. */
288 sort_symtab_syms (register struct symtab
*s
)
290 register struct blockvector
*bv
;
293 register struct block
*b
;
297 bv
= BLOCKVECTOR (s
);
298 nbl
= BLOCKVECTOR_NBLOCKS (bv
);
299 for (i
= 0; i
< nbl
; i
++)
301 b
= BLOCKVECTOR_BLOCK (bv
, i
);
302 if (BLOCK_SHOULD_SORT (b
))
307 /* Make a null terminated copy of the string at PTR with SIZE characters in
308 the obstack pointed to by OBSTACKP . Returns the address of the copy.
309 Note that the string at PTR does not have to be null terminated, I.E. it
310 may be part of a larger string and we are only saving a substring. */
313 obsavestring (char *ptr
, int size
, struct obstack
*obstackp
)
315 register char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
316 /* Open-coded memcpy--saves function call time. These strings are usually
317 short. FIXME: Is this really still true with a compiler that can
320 register char *p1
= ptr
;
321 register char *p2
= p
;
322 char *end
= ptr
+ size
;
330 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
331 in the obstack pointed to by OBSTACKP. */
334 obconcat (struct obstack
*obstackp
, const char *s1
, const char *s2
,
337 register int len
= strlen (s1
) + strlen (s2
) + strlen (s3
) + 1;
338 register char *val
= (char *) obstack_alloc (obstackp
, len
);
345 /* True if we are nested inside psymtab_to_symtab. */
347 int currently_reading_symtab
= 0;
350 decrement_reading_symtab (void *dummy
)
352 currently_reading_symtab
--;
355 /* Get the symbol table that corresponds to a partial_symtab.
356 This is fast after the first time you do it. In fact, there
357 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
361 psymtab_to_symtab (register struct partial_symtab
*pst
)
363 /* If it's been looked up before, return it. */
367 /* If it has not yet been read in, read it. */
370 struct cleanup
*back_to
= make_cleanup (decrement_reading_symtab
, NULL
);
371 currently_reading_symtab
++;
372 (*pst
->read_symtab
) (pst
);
373 do_cleanups (back_to
);
379 /* Initialize entry point information for this objfile. */
382 init_entry_point_info (struct objfile
*objfile
)
384 /* Save startup file's range of PC addresses to help blockframe.c
385 decide where the bottom of the stack is. */
387 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
389 /* Executable file -- record its entry point so we'll recognize
390 the startup file because it contains the entry point. */
391 objfile
->ei
.entry_point
= bfd_get_start_address (objfile
->obfd
);
395 /* Examination of non-executable.o files. Short-circuit this stuff. */
396 objfile
->ei
.entry_point
= INVALID_ENTRY_POINT
;
398 objfile
->ei
.entry_file_lowpc
= INVALID_ENTRY_LOWPC
;
399 objfile
->ei
.entry_file_highpc
= INVALID_ENTRY_HIGHPC
;
400 objfile
->ei
.entry_func_lowpc
= INVALID_ENTRY_LOWPC
;
401 objfile
->ei
.entry_func_highpc
= INVALID_ENTRY_HIGHPC
;
402 objfile
->ei
.main_func_lowpc
= INVALID_ENTRY_LOWPC
;
403 objfile
->ei
.main_func_highpc
= INVALID_ENTRY_HIGHPC
;
406 /* Get current entry point address. */
409 entry_point_address (void)
411 return symfile_objfile
? symfile_objfile
->ei
.entry_point
: 0;
414 /* Remember the lowest-addressed loadable section we've seen.
415 This function is called via bfd_map_over_sections.
417 In case of equal vmas, the section with the largest size becomes the
418 lowest-addressed loadable section.
420 If the vmas and sizes are equal, the last section is considered the
421 lowest-addressed loadable section. */
424 find_lowest_section (bfd
*abfd
, asection
*sect
, PTR obj
)
426 asection
**lowest
= (asection
**) obj
;
428 if (0 == (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
))
431 *lowest
= sect
; /* First loadable section */
432 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
433 *lowest
= sect
; /* A lower loadable section */
434 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
435 && (bfd_section_size (abfd
, (*lowest
))
436 <= bfd_section_size (abfd
, sect
)))
441 /* Build (allocate and populate) a section_addr_info struct from
442 an existing section table. */
444 extern struct section_addr_info
*
445 build_section_addr_info_from_section_table (const struct section_table
*start
,
446 const struct section_table
*end
)
448 struct section_addr_info
*sap
;
449 const struct section_table
*stp
;
452 sap
= xmalloc (sizeof (struct section_addr_info
));
453 memset (sap
, 0, sizeof (struct section_addr_info
));
455 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
457 if (stp
->the_bfd_section
->flags
& (SEC_ALLOC
| SEC_LOAD
)
458 && oidx
< MAX_SECTIONS
)
460 sap
->other
[oidx
].addr
= stp
->addr
;
461 sap
->other
[oidx
].name
= xstrdup (stp
->the_bfd_section
->name
);
462 sap
->other
[oidx
].sectindex
= stp
->the_bfd_section
->index
;
471 /* Free all memory allocated by build_section_addr_info_from_section_table. */
474 free_section_addr_info (struct section_addr_info
*sap
)
478 for (idx
= 0; idx
< MAX_SECTIONS
; idx
++)
479 if (sap
->other
[idx
].name
)
480 xfree (sap
->other
[idx
].name
);
485 /* Parse the user's idea of an offset for dynamic linking, into our idea
486 of how to represent it for fast symbol reading. This is the default
487 version of the sym_fns.sym_offsets function for symbol readers that
488 don't need to do anything special. It allocates a section_offsets table
489 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
492 default_symfile_offsets (struct objfile
*objfile
,
493 struct section_addr_info
*addrs
)
496 asection
*sect
= NULL
;
498 objfile
->num_sections
= SECT_OFF_MAX
;
499 objfile
->section_offsets
= (struct section_offsets
*)
500 obstack_alloc (&objfile
->psymbol_obstack
, SIZEOF_SECTION_OFFSETS
);
501 memset (objfile
->section_offsets
, 0, SIZEOF_SECTION_OFFSETS
);
503 /* Now calculate offsets for section that were specified by the
505 for (i
= 0; i
< MAX_SECTIONS
&& addrs
->other
[i
].name
; i
++)
507 struct other_sections
*osp
;
509 osp
= &addrs
->other
[i
] ;
513 /* Record all sections in offsets */
514 /* The section_offsets in the objfile are here filled in using
516 (objfile
->section_offsets
)->offsets
[osp
->sectindex
] = osp
->addr
;
519 /* Remember the bfd indexes for the .text, .data, .bss and
522 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
524 objfile
->sect_index_text
= sect
->index
;
526 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
528 objfile
->sect_index_data
= sect
->index
;
530 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
532 objfile
->sect_index_bss
= sect
->index
;
534 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
536 objfile
->sect_index_rodata
= sect
->index
;
540 /* Process a symbol file, as either the main file or as a dynamically
543 OBJFILE is where the symbols are to be read from.
545 ADDR is the address where the text segment was loaded, unless the
546 objfile is the main symbol file, in which case it is zero.
548 MAINLINE is nonzero if this is the main symbol file, or zero if
549 it's an extra symbol file such as dynamically loaded code.
551 VERBO is nonzero if the caller has printed a verbose message about
552 the symbol reading (and complaints can be more terse about it). */
555 syms_from_objfile (struct objfile
*objfile
, struct section_addr_info
*addrs
,
556 int mainline
, int verbo
)
558 asection
*lower_sect
;
560 CORE_ADDR lower_offset
;
561 struct section_addr_info local_addr
;
562 struct cleanup
*old_chain
;
565 /* If ADDRS is NULL, initialize the local section_addr_info struct and
566 point ADDRS to it. We now establish the convention that an addr of
567 zero means no load address was specified. */
571 memset (&local_addr
, 0, sizeof (local_addr
));
575 init_entry_point_info (objfile
);
576 find_sym_fns (objfile
);
578 /* Make sure that partially constructed symbol tables will be cleaned up
579 if an error occurs during symbol reading. */
580 old_chain
= make_cleanup_free_objfile (objfile
);
584 /* We will modify the main symbol table, make sure that all its users
585 will be cleaned up if an error occurs during symbol reading. */
586 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
588 /* Since no error yet, throw away the old symbol table. */
590 if (symfile_objfile
!= NULL
)
592 free_objfile (symfile_objfile
);
593 symfile_objfile
= NULL
;
596 /* Currently we keep symbols from the add-symbol-file command.
597 If the user wants to get rid of them, they should do "symbol-file"
598 without arguments first. Not sure this is the best behavior
601 (*objfile
->sf
->sym_new_init
) (objfile
);
604 /* Convert addr into an offset rather than an absolute address.
605 We find the lowest address of a loaded segment in the objfile,
606 and assume that <addr> is where that got loaded.
608 We no longer warn if the lowest section is not a text segment (as
609 happens for the PA64 port. */
612 /* Find lowest loadable section to be used as starting point for
613 continguous sections. FIXME!! won't work without call to find
614 .text first, but this assumes text is lowest section. */
615 lower_sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
616 if (lower_sect
== NULL
)
617 bfd_map_over_sections (objfile
->obfd
, find_lowest_section
,
619 if (lower_sect
== NULL
)
620 warning ("no loadable sections found in added symbol-file %s",
623 if ((bfd_get_section_flags (objfile
->obfd
, lower_sect
) & SEC_CODE
) == 0)
624 warning ("Lowest section in %s is %s at %s",
626 bfd_section_name (objfile
->obfd
, lower_sect
),
627 paddr (bfd_section_vma (objfile
->obfd
, lower_sect
)));
628 if (lower_sect
!= NULL
)
629 lower_offset
= bfd_section_vma (objfile
->obfd
, lower_sect
);
633 /* Calculate offsets for the loadable sections.
634 FIXME! Sections must be in order of increasing loadable section
635 so that contiguous sections can use the lower-offset!!!
637 Adjust offsets if the segments are not contiguous.
638 If the section is contiguous, its offset should be set to
639 the offset of the highest loadable section lower than it
640 (the loadable section directly below it in memory).
641 this_offset = lower_offset = lower_addr - lower_orig_addr */
643 /* Calculate offsets for sections. */
644 for (i
=0 ; i
< MAX_SECTIONS
&& addrs
->other
[i
].name
; i
++)
646 if (addrs
->other
[i
].addr
!= 0)
648 sect
= bfd_get_section_by_name (objfile
->obfd
, addrs
->other
[i
].name
);
651 addrs
->other
[i
].addr
-= bfd_section_vma (objfile
->obfd
, sect
);
652 lower_offset
= addrs
->other
[i
].addr
;
653 /* This is the index used by BFD. */
654 addrs
->other
[i
].sectindex
= sect
->index
;
658 warning ("section %s not found in %s", addrs
->other
[i
].name
,
660 addrs
->other
[i
].addr
= 0;
664 addrs
->other
[i
].addr
= lower_offset
;
668 /* Initialize symbol reading routines for this objfile, allow complaints to
669 appear for this new file, and record how verbose to be, then do the
670 initial symbol reading for this file. */
672 (*objfile
->sf
->sym_init
) (objfile
);
673 clear_complaints (1, verbo
);
675 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
677 #ifndef IBM6000_TARGET
678 /* This is a SVR4/SunOS specific hack, I think. In any event, it
679 screws RS/6000. sym_offsets should be doing this sort of thing,
680 because it knows the mapping between bfd sections and
682 /* This is a hack. As far as I can tell, section offsets are not
683 target dependent. They are all set to addr with a couple of
684 exceptions. The exceptions are sysvr4 shared libraries, whose
685 offsets are kept in solib structures anyway and rs6000 xcoff
686 which handles shared libraries in a completely unique way.
688 Section offsets are built similarly, except that they are built
689 by adding addr in all cases because there is no clear mapping
690 from section_offsets into actual sections. Note that solib.c
691 has a different algorithm for finding section offsets.
693 These should probably all be collapsed into some target
694 independent form of shared library support. FIXME. */
698 struct obj_section
*s
;
700 /* Map section offsets in "addr" back to the object's
701 sections by comparing the section names with bfd's
702 section names. Then adjust the section address by
703 the offset. */ /* for gdb/13815 */
705 ALL_OBJFILE_OSECTIONS (objfile
, s
)
707 CORE_ADDR s_addr
= 0;
711 !s_addr
&& i
< MAX_SECTIONS
&& addrs
->other
[i
].name
;
713 if (strcmp (s
->the_bfd_section
->name
, addrs
->other
[i
].name
) == 0)
714 s_addr
= addrs
->other
[i
].addr
; /* end added for gdb/13815 */
716 s
->addr
-= s
->offset
;
718 s
->endaddr
-= s
->offset
;
719 s
->endaddr
+= s_addr
;
723 #endif /* not IBM6000_TARGET */
725 (*objfile
->sf
->sym_read
) (objfile
, mainline
);
727 if (!have_partial_symbols () && !have_full_symbols ())
730 printf_filtered ("(no debugging symbols found)...");
734 /* Don't allow char * to have a typename (else would get caddr_t).
735 Ditto void *. FIXME: Check whether this is now done by all the
736 symbol readers themselves (many of them now do), and if so remove
739 TYPE_NAME (lookup_pointer_type (builtin_type_char
)) = 0;
740 TYPE_NAME (lookup_pointer_type (builtin_type_void
)) = 0;
742 /* Mark the objfile has having had initial symbol read attempted. Note
743 that this does not mean we found any symbols... */
745 objfile
->flags
|= OBJF_SYMS
;
747 /* Discard cleanups as symbol reading was successful. */
749 discard_cleanups (old_chain
);
751 /* Call this after reading in a new symbol table to give target
752 dependent code a crack at the new symbols. For instance, this
753 could be used to update the values of target-specific symbols GDB
754 needs to keep track of (such as _sigtramp, or whatever). */
756 TARGET_SYMFILE_POSTREAD (objfile
);
759 /* Perform required actions after either reading in the initial
760 symbols for a new objfile, or mapping in the symbols from a reusable
764 new_symfile_objfile (struct objfile
*objfile
, int mainline
, int verbo
)
767 /* If this is the main symbol file we have to clean up all users of the
768 old main symbol file. Otherwise it is sufficient to fixup all the
769 breakpoints that may have been redefined by this symbol file. */
772 /* OK, make it the "real" symbol file. */
773 symfile_objfile
= objfile
;
775 clear_symtab_users ();
779 breakpoint_re_set ();
782 /* We're done reading the symbol file; finish off complaints. */
783 clear_complaints (0, verbo
);
786 /* Process a symbol file, as either the main file or as a dynamically
789 NAME is the file name (which will be tilde-expanded and made
790 absolute herein) (but we don't free or modify NAME itself).
791 FROM_TTY says how verbose to be. MAINLINE specifies whether this
792 is the main symbol file, or whether it's an extra symbol file such
793 as dynamically loaded code. If !mainline, ADDR is the address
794 where the text segment was loaded.
796 Upon success, returns a pointer to the objfile that was added.
797 Upon failure, jumps back to command level (never returns). */
800 symbol_file_add (char *name
, int from_tty
, struct section_addr_info
*addrs
,
801 int mainline
, int flags
)
803 struct objfile
*objfile
;
804 struct partial_symtab
*psymtab
;
807 /* Open a bfd for the file, and give user a chance to burp if we'd be
808 interactively wiping out any existing symbols. */
810 abfd
= symfile_bfd_open (name
);
812 if ((have_full_symbols () || have_partial_symbols ())
815 && !query ("Load new symbol table from \"%s\"? ", name
))
816 error ("Not confirmed.");
818 objfile
= allocate_objfile (abfd
, flags
);
820 /* If the objfile uses a mapped symbol file, and we have a psymtab for
821 it, then skip reading any symbols at this time. */
823 if ((objfile
->flags
& OBJF_MAPPED
) && (objfile
->flags
& OBJF_SYMS
))
825 /* We mapped in an existing symbol table file that already has had
826 initial symbol reading performed, so we can skip that part. Notify
827 the user that instead of reading the symbols, they have been mapped.
829 if (from_tty
|| info_verbose
)
831 printf_filtered ("Mapped symbols for %s...", name
);
833 gdb_flush (gdb_stdout
);
835 init_entry_point_info (objfile
);
836 find_sym_fns (objfile
);
840 /* We either created a new mapped symbol table, mapped an existing
841 symbol table file which has not had initial symbol reading
842 performed, or need to read an unmapped symbol table. */
843 if (from_tty
|| info_verbose
)
845 if (pre_add_symbol_hook
)
846 pre_add_symbol_hook (name
);
849 printf_filtered ("Reading symbols from %s...", name
);
851 gdb_flush (gdb_stdout
);
854 syms_from_objfile (objfile
, addrs
, mainline
, from_tty
);
857 /* We now have at least a partial symbol table. Check to see if the
858 user requested that all symbols be read on initial access via either
859 the gdb startup command line or on a per symbol file basis. Expand
860 all partial symbol tables for this objfile if so. */
862 if ((flags
& OBJF_READNOW
) || readnow_symbol_files
)
864 if (from_tty
|| info_verbose
)
866 printf_filtered ("expanding to full symbols...");
868 gdb_flush (gdb_stdout
);
871 for (psymtab
= objfile
->psymtabs
;
873 psymtab
= psymtab
->next
)
875 psymtab_to_symtab (psymtab
);
879 if (from_tty
|| info_verbose
)
881 if (post_add_symbol_hook
)
882 post_add_symbol_hook ();
885 printf_filtered ("done.\n");
886 gdb_flush (gdb_stdout
);
890 new_symfile_objfile (objfile
, mainline
, from_tty
);
892 if (target_new_objfile_hook
)
893 target_new_objfile_hook (objfile
);
898 /* Call symbol_file_add() with default values and update whatever is
899 affected by the loading of a new main().
900 Used when the file is supplied in the gdb command line
901 and by some targets with special loading requirements.
902 The auxiliary function, symbol_file_add_main_1(), has the flags
903 argument for the switches that can only be specified in the symbol_file
907 symbol_file_add_main (char *args
, int from_tty
)
909 symbol_file_add_main_1 (args
, from_tty
, 0);
913 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
915 symbol_file_add (args
, from_tty
, NULL
, 1, flags
);
918 RESET_HP_UX_GLOBALS ();
921 /* Getting new symbols may change our opinion about
922 what is frameless. */
923 reinit_frame_cache ();
925 set_initial_language ();
929 symbol_file_clear (int from_tty
)
931 if ((have_full_symbols () || have_partial_symbols ())
933 && !query ("Discard symbol table from `%s'? ",
934 symfile_objfile
->name
))
935 error ("Not confirmed.");
936 free_all_objfiles ();
938 /* solib descriptors may have handles to objfiles. Since their
939 storage has just been released, we'd better wipe the solib
942 #if defined(SOLIB_RESTART)
946 symfile_objfile
= NULL
;
948 printf_unfiltered ("No symbol file now.\n");
950 RESET_HP_UX_GLOBALS ();
954 /* This is the symbol-file command. Read the file, analyze its
955 symbols, and add a struct symtab to a symtab list. The syntax of
956 the command is rather bizarre--(1) buildargv implements various
957 quoting conventions which are undocumented and have little or
958 nothing in common with the way things are quoted (or not quoted)
959 elsewhere in GDB, (2) options are used, which are not generally
960 used in GDB (perhaps "set mapped on", "set readnow on" would be
961 better), (3) the order of options matters, which is contrary to GNU
962 conventions (because it is confusing and inconvenient). */
963 /* Note: ezannoni 2000-04-17. This function used to have support for
964 rombug (see remote-os9k.c). It consisted of a call to target_link()
965 (target.c) to get the address of the text segment from the target,
966 and pass that to symbol_file_add(). This is no longer supported. */
969 symbol_file_command (char *args
, int from_tty
)
973 struct cleanup
*cleanups
;
974 int flags
= OBJF_USERLOADED
;
980 symbol_file_clear (from_tty
);
984 if ((argv
= buildargv (args
)) == NULL
)
988 cleanups
= make_cleanup_freeargv (argv
);
989 while (*argv
!= NULL
)
991 if (STREQ (*argv
, "-mapped"))
992 flags
|= OBJF_MAPPED
;
994 if (STREQ (*argv
, "-readnow"))
995 flags
|= OBJF_READNOW
;
998 error ("unknown option `%s'", *argv
);
1003 symbol_file_add_main_1 (name
, from_tty
, flags
);
1010 error ("no symbol file name was specified");
1012 do_cleanups (cleanups
);
1016 /* Set the initial language.
1018 A better solution would be to record the language in the psymtab when reading
1019 partial symbols, and then use it (if known) to set the language. This would
1020 be a win for formats that encode the language in an easily discoverable place,
1021 such as DWARF. For stabs, we can jump through hoops looking for specially
1022 named symbols or try to intuit the language from the specific type of stabs
1023 we find, but we can't do that until later when we read in full symbols.
1027 set_initial_language (void)
1029 struct partial_symtab
*pst
;
1030 enum language lang
= language_unknown
;
1032 pst
= find_main_psymtab ();
1035 if (pst
->filename
!= NULL
)
1037 lang
= deduce_language_from_filename (pst
->filename
);
1039 if (lang
== language_unknown
)
1041 /* Make C the default language */
1044 set_language (lang
);
1045 expected_language
= current_language
; /* Don't warn the user */
1049 /* Open file specified by NAME and hand it off to BFD for preliminary
1050 analysis. Result is a newly initialized bfd *, which includes a newly
1051 malloc'd` copy of NAME (tilde-expanded and made absolute).
1052 In case of trouble, error() is called. */
1055 symfile_bfd_open (char *name
)
1059 char *absolute_name
;
1063 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy */
1065 /* Look down path for it, allocate 2nd new malloc'd copy. */
1066 desc
= openp (getenv ("PATH"), 1, name
, O_RDONLY
| O_BINARY
, 0, &absolute_name
);
1067 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1070 char *exename
= alloca (strlen (name
) + 5);
1071 strcat (strcpy (exename
, name
), ".exe");
1072 desc
= openp (getenv ("PATH"), 1, exename
, O_RDONLY
| O_BINARY
,
1078 make_cleanup (xfree
, name
);
1079 perror_with_name (name
);
1081 xfree (name
); /* Free 1st new malloc'd copy */
1082 name
= absolute_name
; /* Keep 2nd malloc'd copy in bfd */
1083 /* It'll be freed in free_objfile(). */
1085 sym_bfd
= bfd_fdopenr (name
, gnutarget
, desc
);
1089 make_cleanup (xfree
, name
);
1090 error ("\"%s\": can't open to read symbols: %s.", name
,
1091 bfd_errmsg (bfd_get_error ()));
1093 sym_bfd
->cacheable
= true;
1095 if (!bfd_check_format (sym_bfd
, bfd_object
))
1097 /* FIXME: should be checking for errors from bfd_close (for one thing,
1098 on error it does not free all the storage associated with the
1100 bfd_close (sym_bfd
); /* This also closes desc */
1101 make_cleanup (xfree
, name
);
1102 error ("\"%s\": can't read symbols: %s.", name
,
1103 bfd_errmsg (bfd_get_error ()));
1108 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1109 startup by the _initialize routine in each object file format reader,
1110 to register information about each format the the reader is prepared
1114 add_symtab_fns (struct sym_fns
*sf
)
1116 sf
->next
= symtab_fns
;
1121 /* Initialize to read symbols from the symbol file sym_bfd. It either
1122 returns or calls error(). The result is an initialized struct sym_fns
1123 in the objfile structure, that contains cached information about the
1127 find_sym_fns (struct objfile
*objfile
)
1130 enum bfd_flavour our_flavour
= bfd_get_flavour (objfile
->obfd
);
1131 char *our_target
= bfd_get_target (objfile
->obfd
);
1133 /* Special kludge for apollo. See dstread.c. */
1134 if (STREQN (our_target
, "apollo", 6))
1135 our_flavour
= (enum bfd_flavour
) -2;
1137 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
->next
)
1139 if (our_flavour
== sf
->sym_flavour
)
1145 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
1146 bfd_get_target (objfile
->obfd
));
1149 /* This function runs the load command of our current target. */
1152 load_command (char *arg
, int from_tty
)
1155 arg
= get_exec_file (1);
1156 target_load (arg
, from_tty
);
1158 /* After re-loading the executable, we don't really know which
1159 overlays are mapped any more. */
1160 overlay_cache_invalid
= 1;
1163 /* This version of "load" should be usable for any target. Currently
1164 it is just used for remote targets, not inftarg.c or core files,
1165 on the theory that only in that case is it useful.
1167 Avoiding xmodem and the like seems like a win (a) because we don't have
1168 to worry about finding it, and (b) On VMS, fork() is very slow and so
1169 we don't want to run a subprocess. On the other hand, I'm not sure how
1170 performance compares. */
1172 static int download_write_size
= 512;
1173 static int validate_download
= 0;
1176 generic_load (char *args
, int from_tty
)
1180 time_t start_time
, end_time
; /* Start and end times of download */
1181 unsigned long data_count
= 0; /* Number of bytes transferred to memory */
1182 unsigned long write_count
= 0; /* Number of writes needed. */
1183 unsigned long load_offset
; /* offset to add to vma for each section */
1185 struct cleanup
*old_cleanups
;
1187 CORE_ADDR total_size
= 0;
1188 CORE_ADDR total_sent
= 0;
1190 /* Parse the input argument - the user can specify a load offset as
1191 a second argument. */
1192 filename
= xmalloc (strlen (args
) + 1);
1193 old_cleanups
= make_cleanup (xfree
, filename
);
1194 strcpy (filename
, args
);
1195 offptr
= strchr (filename
, ' ');
1199 load_offset
= strtoul (offptr
, &endptr
, 0);
1200 if (offptr
== endptr
)
1201 error ("Invalid download offset:%s\n", offptr
);
1207 /* Open the file for loading. */
1208 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
1209 if (loadfile_bfd
== NULL
)
1211 perror_with_name (filename
);
1215 /* FIXME: should be checking for errors from bfd_close (for one thing,
1216 on error it does not free all the storage associated with the
1218 make_cleanup_bfd_close (loadfile_bfd
);
1220 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
1222 error ("\"%s\" is not an object file: %s", filename
,
1223 bfd_errmsg (bfd_get_error ()));
1226 for (s
= loadfile_bfd
->sections
; s
; s
= s
->next
)
1227 if (s
->flags
& SEC_LOAD
)
1228 total_size
+= bfd_get_section_size_before_reloc (s
);
1230 start_time
= time (NULL
);
1232 for (s
= loadfile_bfd
->sections
; s
; s
= s
->next
)
1234 if (s
->flags
& SEC_LOAD
)
1236 CORE_ADDR size
= bfd_get_section_size_before_reloc (s
);
1240 struct cleanup
*old_chain
;
1241 CORE_ADDR lma
= s
->lma
+ load_offset
;
1242 CORE_ADDR block_size
;
1244 const char *sect_name
= bfd_get_section_name (loadfile_bfd
, s
);
1247 if (download_write_size
> 0 && size
> download_write_size
)
1248 block_size
= download_write_size
;
1252 buffer
= xmalloc (size
);
1253 old_chain
= make_cleanup (xfree
, buffer
);
1255 /* Is this really necessary? I guess it gives the user something
1256 to look at during a long download. */
1258 ui_out_message (uiout
, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1259 sect_name
, paddr_nz (size
), paddr_nz (lma
));
1261 fprintf_unfiltered (gdb_stdout
,
1262 "Loading section %s, size 0x%s lma 0x%s\n",
1263 sect_name
, paddr_nz (size
), paddr_nz (lma
));
1266 bfd_get_section_contents (loadfile_bfd
, s
, buffer
, 0, size
);
1272 CORE_ADDR this_transfer
= size
- sent
;
1273 if (this_transfer
>= block_size
)
1274 this_transfer
= block_size
;
1275 len
= target_write_memory_partial (lma
, buffer
,
1276 this_transfer
, &err
);
1279 if (validate_download
)
1281 /* Broken memories and broken monitors manifest
1282 themselves here when bring new computers to
1283 life. This doubles already slow downloads. */
1284 /* NOTE: cagney/1999-10-18: A more efficient
1285 implementation might add a verify_memory()
1286 method to the target vector and then use
1287 that. remote.c could implement that method
1288 using the ``qCRC'' packet. */
1289 char *check
= xmalloc (len
);
1290 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
1291 if (target_read_memory (lma
, check
, len
) != 0)
1292 error ("Download verify read failed at 0x%s",
1294 if (memcmp (buffer
, check
, len
) != 0)
1295 error ("Download verify compare failed at 0x%s",
1297 do_cleanups (verify_cleanups
);
1306 || (ui_load_progress_hook
!= NULL
1307 && ui_load_progress_hook (sect_name
, sent
)))
1308 error ("Canceled the download");
1310 if (show_load_progress
!= NULL
)
1311 show_load_progress (sect_name
, sent
, size
, total_sent
, total_size
);
1313 while (sent
< size
);
1316 error ("Memory access error while loading section %s.", sect_name
);
1318 do_cleanups (old_chain
);
1323 end_time
= time (NULL
);
1326 entry
= bfd_get_start_address (loadfile_bfd
);
1328 ui_out_text (uiout
, "Start address ");
1329 ui_out_field_fmt (uiout
, "address", "0x%s" , paddr_nz (entry
));
1330 ui_out_text (uiout
, ", load size ");
1331 ui_out_field_fmt (uiout
, "load-size", "%ld" , data_count
);
1332 ui_out_text (uiout
, "\n");
1335 fprintf_unfiltered (gdb_stdout
,
1336 "Start address 0x%s , load size %ld\n",
1337 paddr_nz (entry
), data_count
);
1339 /* We were doing this in remote-mips.c, I suspect it is right
1340 for other targets too. */
1344 /* FIXME: are we supposed to call symbol_file_add or not? According to
1345 a comment from remote-mips.c (where a call to symbol_file_add was
1346 commented out), making the call confuses GDB if more than one file is
1347 loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c
1350 print_transfer_performance (gdb_stdout
, data_count
, write_count
,
1351 end_time
- start_time
);
1353 do_cleanups (old_cleanups
);
1356 /* Report how fast the transfer went. */
1358 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1359 replaced by print_transfer_performance (with a very different
1360 function signature). */
1363 report_transfer_performance (unsigned long data_count
, time_t start_time
,
1366 print_transfer_performance (gdb_stdout
, data_count
, end_time
- start_time
, 0);
1370 print_transfer_performance (struct ui_file
*stream
,
1371 unsigned long data_count
,
1372 unsigned long write_count
,
1373 unsigned long time_count
)
1376 ui_out_text (uiout
, "Transfer rate: ");
1379 ui_out_field_fmt (uiout
, "transfer-rate", "%ld",
1380 (data_count
* 8) / time_count
);
1381 ui_out_text (uiout
, " bits/sec");
1385 ui_out_field_fmt (uiout
, "transferred-bits", "%ld", (data_count
* 8));
1386 ui_out_text (uiout
, " bits in <1 sec");
1388 if (write_count
> 0)
1390 ui_out_text (uiout
, ", ");
1391 ui_out_field_fmt (uiout
, "write-rate", "%ld", data_count
/ write_count
);
1392 ui_out_text (uiout
, " bytes/write");
1394 ui_out_text (uiout
, ".\n");
1396 fprintf_unfiltered (stream
, "Transfer rate: ");
1398 fprintf_unfiltered (stream
, "%ld bits/sec", (data_count
* 8) / time_count
);
1400 fprintf_unfiltered (stream
, "%ld bits in <1 sec", (data_count
* 8));
1401 if (write_count
> 0)
1402 fprintf_unfiltered (stream
, ", %ld bytes/write", data_count
/ write_count
);
1403 fprintf_unfiltered (stream
, ".\n");
1407 /* This function allows the addition of incrementally linked object files.
1408 It does not modify any state in the target, only in the debugger. */
1409 /* Note: ezannoni 2000-04-13 This function/command used to have a
1410 special case syntax for the rombug target (Rombug is the boot
1411 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
1412 rombug case, the user doesn't need to supply a text address,
1413 instead a call to target_link() (in target.c) would supply the
1414 value to use. We are now discontinuing this type of ad hoc syntax. */
1418 add_symbol_file_command (char *args
, int from_tty
)
1420 char *filename
= NULL
;
1421 int flags
= OBJF_USERLOADED
;
1423 int expecting_option
= 0;
1424 int section_index
= 0;
1428 int expecting_sec_name
= 0;
1429 int expecting_sec_addr
= 0;
1435 } sect_opts
[SECT_OFF_MAX
];
1437 struct section_addr_info section_addrs
;
1438 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
1443 error ("add-symbol-file takes a file name and an address");
1445 /* Make a copy of the string that we can safely write into. */
1446 args
= xstrdup (args
);
1448 /* Ensure section_addrs is initialized */
1449 memset (§ion_addrs
, 0, sizeof (section_addrs
));
1451 while (*args
!= '\000')
1453 /* Any leading spaces? */
1454 while (isspace (*args
))
1457 /* Point arg to the beginning of the argument. */
1460 /* Move args pointer over the argument. */
1461 while ((*args
!= '\000') && !isspace (*args
))
1464 /* If there are more arguments, terminate arg and
1466 if (*args
!= '\000')
1469 /* Now process the argument. */
1472 /* The first argument is the file name. */
1473 filename
= tilde_expand (arg
);
1474 make_cleanup (xfree
, filename
);
1479 /* The second argument is always the text address at which
1480 to load the program. */
1481 sect_opts
[section_index
].name
= ".text";
1482 sect_opts
[section_index
].value
= arg
;
1487 /* It's an option (starting with '-') or it's an argument
1492 if (strcmp (arg
, "-mapped") == 0)
1493 flags
|= OBJF_MAPPED
;
1495 if (strcmp (arg
, "-readnow") == 0)
1496 flags
|= OBJF_READNOW
;
1498 if (strcmp (arg
, "-s") == 0)
1500 if (section_index
>= SECT_OFF_MAX
)
1501 error ("Too many sections specified.");
1502 expecting_sec_name
= 1;
1503 expecting_sec_addr
= 1;
1508 if (expecting_sec_name
)
1510 sect_opts
[section_index
].name
= arg
;
1511 expecting_sec_name
= 0;
1514 if (expecting_sec_addr
)
1516 sect_opts
[section_index
].value
= arg
;
1517 expecting_sec_addr
= 0;
1521 error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*");
1527 /* Print the prompt for the query below. And save the arguments into
1528 a sect_addr_info structure to be passed around to other
1529 functions. We have to split this up into separate print
1530 statements because local_hex_string returns a local static
1533 printf_filtered ("add symbol table from file \"%s\" at\n", filename
);
1534 for (i
= 0; i
< section_index
; i
++)
1537 char *val
= sect_opts
[i
].value
;
1538 char *sec
= sect_opts
[i
].name
;
1540 val
= sect_opts
[i
].value
;
1541 if (val
[0] == '0' && val
[1] == 'x')
1542 addr
= strtoul (val
+2, NULL
, 16);
1544 addr
= strtoul (val
, NULL
, 10);
1546 /* Here we store the section offsets in the order they were
1547 entered on the command line. */
1548 section_addrs
.other
[sec_num
].name
= sec
;
1549 section_addrs
.other
[sec_num
].addr
= addr
;
1550 printf_filtered ("\t%s_addr = %s\n",
1552 local_hex_string ((unsigned long)addr
));
1555 /* The object's sections are initialized when a
1556 call is made to build_objfile_section_table (objfile).
1557 This happens in reread_symbols.
1558 At this point, we don't know what file type this is,
1559 so we can't determine what section names are valid. */
1562 if (from_tty
&& (!query ("%s", "")))
1563 error ("Not confirmed.");
1565 symbol_file_add (filename
, from_tty
, §ion_addrs
, 0, flags
);
1567 /* Getting new symbols may change our opinion about what is
1569 reinit_frame_cache ();
1570 do_cleanups (my_cleanups
);
1574 add_shared_symbol_files_command (char *args
, int from_tty
)
1576 #ifdef ADD_SHARED_SYMBOL_FILES
1577 ADD_SHARED_SYMBOL_FILES (args
, from_tty
);
1579 error ("This command is not available in this configuration of GDB.");
1583 /* Re-read symbols if a symbol-file has changed. */
1585 reread_symbols (void)
1587 struct objfile
*objfile
;
1590 struct stat new_statbuf
;
1593 /* With the addition of shared libraries, this should be modified,
1594 the load time should be saved in the partial symbol tables, since
1595 different tables may come from different source files. FIXME.
1596 This routine should then walk down each partial symbol table
1597 and see if the symbol table that it originates from has been changed */
1599 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
1603 #ifdef IBM6000_TARGET
1604 /* If this object is from a shared library, then you should
1605 stat on the library name, not member name. */
1607 if (objfile
->obfd
->my_archive
)
1608 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
1611 res
= stat (objfile
->name
, &new_statbuf
);
1614 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1615 printf_filtered ("`%s' has disappeared; keeping its symbols.\n",
1619 new_modtime
= new_statbuf
.st_mtime
;
1620 if (new_modtime
!= objfile
->mtime
)
1622 struct cleanup
*old_cleanups
;
1623 struct section_offsets
*offsets
;
1625 char *obfd_filename
;
1627 printf_filtered ("`%s' has changed; re-reading symbols.\n",
1630 /* There are various functions like symbol_file_add,
1631 symfile_bfd_open, syms_from_objfile, etc., which might
1632 appear to do what we want. But they have various other
1633 effects which we *don't* want. So we just do stuff
1634 ourselves. We don't worry about mapped files (for one thing,
1635 any mapped file will be out of date). */
1637 /* If we get an error, blow away this objfile (not sure if
1638 that is the correct response for things like shared
1640 old_cleanups
= make_cleanup_free_objfile (objfile
);
1641 /* We need to do this whenever any symbols go away. */
1642 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
1644 /* Clean up any state BFD has sitting around. We don't need
1645 to close the descriptor but BFD lacks a way of closing the
1646 BFD without closing the descriptor. */
1647 obfd_filename
= bfd_get_filename (objfile
->obfd
);
1648 if (!bfd_close (objfile
->obfd
))
1649 error ("Can't close BFD for %s: %s", objfile
->name
,
1650 bfd_errmsg (bfd_get_error ()));
1651 objfile
->obfd
= bfd_openr (obfd_filename
, gnutarget
);
1652 if (objfile
->obfd
== NULL
)
1653 error ("Can't open %s to read symbols.", objfile
->name
);
1654 /* bfd_openr sets cacheable to true, which is what we want. */
1655 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
1656 error ("Can't read symbols from %s: %s.", objfile
->name
,
1657 bfd_errmsg (bfd_get_error ()));
1659 /* Save the offsets, we will nuke them with the rest of the
1661 num_offsets
= objfile
->num_sections
;
1662 offsets
= (struct section_offsets
*) alloca (SIZEOF_SECTION_OFFSETS
);
1663 memcpy (offsets
, objfile
->section_offsets
, SIZEOF_SECTION_OFFSETS
);
1665 /* Nuke all the state that we will re-read. Much of the following
1666 code which sets things to NULL really is necessary to tell
1667 other parts of GDB that there is nothing currently there. */
1669 /* FIXME: Do we have to free a whole linked list, or is this
1671 if (objfile
->global_psymbols
.list
)
1672 mfree (objfile
->md
, objfile
->global_psymbols
.list
);
1673 memset (&objfile
->global_psymbols
, 0,
1674 sizeof (objfile
->global_psymbols
));
1675 if (objfile
->static_psymbols
.list
)
1676 mfree (objfile
->md
, objfile
->static_psymbols
.list
);
1677 memset (&objfile
->static_psymbols
, 0,
1678 sizeof (objfile
->static_psymbols
));
1680 /* Free the obstacks for non-reusable objfiles */
1681 free_bcache (&objfile
->psymbol_cache
);
1682 obstack_free (&objfile
->psymbol_obstack
, 0);
1683 obstack_free (&objfile
->symbol_obstack
, 0);
1684 obstack_free (&objfile
->type_obstack
, 0);
1685 objfile
->sections
= NULL
;
1686 objfile
->symtabs
= NULL
;
1687 objfile
->psymtabs
= NULL
;
1688 objfile
->free_psymtabs
= NULL
;
1689 objfile
->msymbols
= NULL
;
1690 objfile
->minimal_symbol_count
= 0;
1691 memset (&objfile
->msymbol_hash
, 0,
1692 sizeof (objfile
->msymbol_hash
));
1693 memset (&objfile
->msymbol_demangled_hash
, 0,
1694 sizeof (objfile
->msymbol_demangled_hash
));
1695 objfile
->fundamental_types
= NULL
;
1696 if (objfile
->sf
!= NULL
)
1698 (*objfile
->sf
->sym_finish
) (objfile
);
1701 /* We never make this a mapped file. */
1703 /* obstack_specify_allocation also initializes the obstack so
1705 obstack_specify_allocation (&objfile
->psymbol_cache
.cache
, 0, 0,
1707 obstack_specify_allocation (&objfile
->psymbol_obstack
, 0, 0,
1709 obstack_specify_allocation (&objfile
->symbol_obstack
, 0, 0,
1711 obstack_specify_allocation (&objfile
->type_obstack
, 0, 0,
1713 if (build_objfile_section_table (objfile
))
1715 error ("Can't find the file sections in `%s': %s",
1716 objfile
->name
, bfd_errmsg (bfd_get_error ()));
1719 /* We use the same section offsets as from last time. I'm not
1720 sure whether that is always correct for shared libraries. */
1721 objfile
->section_offsets
= (struct section_offsets
*)
1722 obstack_alloc (&objfile
->psymbol_obstack
, SIZEOF_SECTION_OFFSETS
);
1723 memcpy (objfile
->section_offsets
, offsets
, SIZEOF_SECTION_OFFSETS
);
1724 objfile
->num_sections
= num_offsets
;
1726 /* What the hell is sym_new_init for, anyway? The concept of
1727 distinguishing between the main file and additional files
1728 in this way seems rather dubious. */
1729 if (objfile
== symfile_objfile
)
1731 (*objfile
->sf
->sym_new_init
) (objfile
);
1733 RESET_HP_UX_GLOBALS ();
1737 (*objfile
->sf
->sym_init
) (objfile
);
1738 clear_complaints (1, 1);
1739 /* The "mainline" parameter is a hideous hack; I think leaving it
1740 zero is OK since dbxread.c also does what it needs to do if
1741 objfile->global_psymbols.size is 0. */
1742 (*objfile
->sf
->sym_read
) (objfile
, 0);
1743 if (!have_partial_symbols () && !have_full_symbols ())
1746 printf_filtered ("(no debugging symbols found)\n");
1749 objfile
->flags
|= OBJF_SYMS
;
1751 /* We're done reading the symbol file; finish off complaints. */
1752 clear_complaints (0, 1);
1754 /* Getting new symbols may change our opinion about what is
1757 reinit_frame_cache ();
1759 /* Discard cleanups as symbol reading was successful. */
1760 discard_cleanups (old_cleanups
);
1762 /* If the mtime has changed between the time we set new_modtime
1763 and now, we *want* this to be out of date, so don't call stat
1765 objfile
->mtime
= new_modtime
;
1768 /* Call this after reading in a new symbol table to give target
1769 dependent code a crack at the new symbols. For instance, this
1770 could be used to update the values of target-specific symbols GDB
1771 needs to keep track of (such as _sigtramp, or whatever). */
1773 TARGET_SYMFILE_POSTREAD (objfile
);
1779 clear_symtab_users ();
1791 static filename_language
*filename_language_table
;
1792 static int fl_table_size
, fl_table_next
;
1795 add_filename_language (char *ext
, enum language lang
)
1797 if (fl_table_next
>= fl_table_size
)
1799 fl_table_size
+= 10;
1800 filename_language_table
= xrealloc (filename_language_table
,
1804 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
1805 filename_language_table
[fl_table_next
].lang
= lang
;
1809 static char *ext_args
;
1812 set_ext_lang_command (char *args
, int from_tty
)
1815 char *cp
= ext_args
;
1818 /* First arg is filename extension, starting with '.' */
1820 error ("'%s': Filename extension must begin with '.'", ext_args
);
1822 /* Find end of first arg. */
1823 while (*cp
&& !isspace (*cp
))
1827 error ("'%s': two arguments required -- filename extension and language",
1830 /* Null-terminate first arg */
1833 /* Find beginning of second arg, which should be a source language. */
1834 while (*cp
&& isspace (*cp
))
1838 error ("'%s': two arguments required -- filename extension and language",
1841 /* Lookup the language from among those we know. */
1842 lang
= language_enum (cp
);
1844 /* Now lookup the filename extension: do we already know it? */
1845 for (i
= 0; i
< fl_table_next
; i
++)
1846 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
1849 if (i
>= fl_table_next
)
1851 /* new file extension */
1852 add_filename_language (ext_args
, lang
);
1856 /* redefining a previously known filename extension */
1859 /* query ("Really make files of type %s '%s'?", */
1860 /* ext_args, language_str (lang)); */
1862 xfree (filename_language_table
[i
].ext
);
1863 filename_language_table
[i
].ext
= xstrdup (ext_args
);
1864 filename_language_table
[i
].lang
= lang
;
1869 info_ext_lang_command (char *args
, int from_tty
)
1873 printf_filtered ("Filename extensions and the languages they represent:");
1874 printf_filtered ("\n\n");
1875 for (i
= 0; i
< fl_table_next
; i
++)
1876 printf_filtered ("\t%s\t- %s\n",
1877 filename_language_table
[i
].ext
,
1878 language_str (filename_language_table
[i
].lang
));
1882 init_filename_language_table (void)
1884 if (fl_table_size
== 0) /* protect against repetition */
1888 filename_language_table
=
1889 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
1890 add_filename_language (".c", language_c
);
1891 add_filename_language (".C", language_cplus
);
1892 add_filename_language (".cc", language_cplus
);
1893 add_filename_language (".cp", language_cplus
);
1894 add_filename_language (".cpp", language_cplus
);
1895 add_filename_language (".cxx", language_cplus
);
1896 add_filename_language (".c++", language_cplus
);
1897 add_filename_language (".java", language_java
);
1898 add_filename_language (".class", language_java
);
1899 add_filename_language (".ch", language_chill
);
1900 add_filename_language (".c186", language_chill
);
1901 add_filename_language (".c286", language_chill
);
1902 add_filename_language (".f", language_fortran
);
1903 add_filename_language (".F", language_fortran
);
1904 add_filename_language (".s", language_asm
);
1905 add_filename_language (".S", language_asm
);
1906 add_filename_language (".pas", language_pascal
);
1907 add_filename_language (".p", language_pascal
);
1908 add_filename_language (".pp", language_pascal
);
1913 deduce_language_from_filename (char *filename
)
1918 if (filename
!= NULL
)
1919 if ((cp
= strrchr (filename
, '.')) != NULL
)
1920 for (i
= 0; i
< fl_table_next
; i
++)
1921 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
1922 return filename_language_table
[i
].lang
;
1924 return language_unknown
;
1929 Allocate and partly initialize a new symbol table. Return a pointer
1930 to it. error() if no space.
1932 Caller must set these fields:
1938 possibly free_named_symtabs (symtab->filename);
1942 allocate_symtab (char *filename
, struct objfile
*objfile
)
1944 register struct symtab
*symtab
;
1946 symtab
= (struct symtab
*)
1947 obstack_alloc (&objfile
->symbol_obstack
, sizeof (struct symtab
));
1948 memset (symtab
, 0, sizeof (*symtab
));
1949 symtab
->filename
= obsavestring (filename
, strlen (filename
),
1950 &objfile
->symbol_obstack
);
1951 symtab
->fullname
= NULL
;
1952 symtab
->language
= deduce_language_from_filename (filename
);
1953 symtab
->debugformat
= obsavestring ("unknown", 7,
1954 &objfile
->symbol_obstack
);
1956 /* Hook it to the objfile it comes from */
1958 symtab
->objfile
= objfile
;
1959 symtab
->next
= objfile
->symtabs
;
1960 objfile
->symtabs
= symtab
;
1962 /* FIXME: This should go away. It is only defined for the Z8000,
1963 and the Z8000 definition of this macro doesn't have anything to
1964 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
1965 here for convenience. */
1966 #ifdef INIT_EXTRA_SYMTAB_INFO
1967 INIT_EXTRA_SYMTAB_INFO (symtab
);
1973 struct partial_symtab
*
1974 allocate_psymtab (char *filename
, struct objfile
*objfile
)
1976 struct partial_symtab
*psymtab
;
1978 if (objfile
->free_psymtabs
)
1980 psymtab
= objfile
->free_psymtabs
;
1981 objfile
->free_psymtabs
= psymtab
->next
;
1984 psymtab
= (struct partial_symtab
*)
1985 obstack_alloc (&objfile
->psymbol_obstack
,
1986 sizeof (struct partial_symtab
));
1988 memset (psymtab
, 0, sizeof (struct partial_symtab
));
1989 psymtab
->filename
= obsavestring (filename
, strlen (filename
),
1990 &objfile
->psymbol_obstack
);
1991 psymtab
->symtab
= NULL
;
1992 psymtab
->text_addrs
= addrset_new (&objfile
->psymbol_obstack
);
1994 /* Prepend it to the psymtab list for the objfile it belongs to.
1995 Psymtabs are searched in most recent inserted -> least recent
1998 psymtab
->objfile
= objfile
;
1999 psymtab
->next
= objfile
->psymtabs
;
2000 objfile
->psymtabs
= psymtab
;
2003 struct partial_symtab
**prev_pst
;
2004 psymtab
->objfile
= objfile
;
2005 psymtab
->next
= NULL
;
2006 prev_pst
= &(objfile
->psymtabs
);
2007 while ((*prev_pst
) != NULL
)
2008 prev_pst
= &((*prev_pst
)->next
);
2009 (*prev_pst
) = psymtab
;
2017 discard_psymtab (struct partial_symtab
*pst
)
2019 struct partial_symtab
**prev_pst
;
2022 Empty psymtabs happen as a result of header files which don't
2023 have any symbols in them. There can be a lot of them. But this
2024 check is wrong, in that a psymtab with N_SLINE entries but
2025 nothing else is not empty, but we don't realize that. Fixing
2026 that without slowing things down might be tricky. */
2028 /* First, snip it out of the psymtab chain */
2030 prev_pst
= &(pst
->objfile
->psymtabs
);
2031 while ((*prev_pst
) != pst
)
2032 prev_pst
= &((*prev_pst
)->next
);
2033 (*prev_pst
) = pst
->next
;
2035 /* Next, put it on a free list for recycling */
2037 pst
->next
= pst
->objfile
->free_psymtabs
;
2038 pst
->objfile
->free_psymtabs
= pst
;
2042 /* Reset all data structures in gdb which may contain references to symbol
2046 clear_symtab_users (void)
2048 /* Someday, we should do better than this, by only blowing away
2049 the things that really need to be blown. */
2050 clear_value_history ();
2052 clear_internalvars ();
2053 breakpoint_re_set ();
2054 set_default_breakpoint (0, 0, 0, 0);
2055 current_source_symtab
= 0;
2056 current_source_line
= 0;
2057 clear_pc_function_cache ();
2058 if (target_new_objfile_hook
)
2059 target_new_objfile_hook (NULL
);
2063 clear_symtab_users_cleanup (void *ignore
)
2065 clear_symtab_users ();
2068 /* clear_symtab_users_once:
2070 This function is run after symbol reading, or from a cleanup.
2071 If an old symbol table was obsoleted, the old symbol table
2072 has been blown away, but the other GDB data structures that may
2073 reference it have not yet been cleared or re-directed. (The old
2074 symtab was zapped, and the cleanup queued, in free_named_symtab()
2077 This function can be queued N times as a cleanup, or called
2078 directly; it will do all the work the first time, and then will be a
2079 no-op until the next time it is queued. This works by bumping a
2080 counter at queueing time. Much later when the cleanup is run, or at
2081 the end of symbol processing (in case the cleanup is discarded), if
2082 the queued count is greater than the "done-count", we do the work
2083 and set the done-count to the queued count. If the queued count is
2084 less than or equal to the done-count, we just ignore the call. This
2085 is needed because reading a single .o file will often replace many
2086 symtabs (one per .h file, for example), and we don't want to reset
2087 the breakpoints N times in the user's face.
2089 The reason we both queue a cleanup, and call it directly after symbol
2090 reading, is because the cleanup protects us in case of errors, but is
2091 discarded if symbol reading is successful. */
2094 /* FIXME: As free_named_symtabs is currently a big noop this function
2095 is no longer needed. */
2096 static void clear_symtab_users_once (void);
2098 static int clear_symtab_users_queued
;
2099 static int clear_symtab_users_done
;
2102 clear_symtab_users_once (void)
2104 /* Enforce once-per-`do_cleanups'-semantics */
2105 if (clear_symtab_users_queued
<= clear_symtab_users_done
)
2107 clear_symtab_users_done
= clear_symtab_users_queued
;
2109 clear_symtab_users ();
2113 /* Delete the specified psymtab, and any others that reference it. */
2116 cashier_psymtab (struct partial_symtab
*pst
)
2118 struct partial_symtab
*ps
, *pprev
= NULL
;
2121 /* Find its previous psymtab in the chain */
2122 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2131 /* Unhook it from the chain. */
2132 if (ps
== pst
->objfile
->psymtabs
)
2133 pst
->objfile
->psymtabs
= ps
->next
;
2135 pprev
->next
= ps
->next
;
2137 /* FIXME, we can't conveniently deallocate the entries in the
2138 partial_symbol lists (global_psymbols/static_psymbols) that
2139 this psymtab points to. These just take up space until all
2140 the psymtabs are reclaimed. Ditto the dependencies list and
2141 filename, which are all in the psymbol_obstack. */
2143 /* We need to cashier any psymtab that has this one as a dependency... */
2145 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2147 for (i
= 0; i
< ps
->number_of_dependencies
; i
++)
2149 if (ps
->dependencies
[i
] == pst
)
2151 cashier_psymtab (ps
);
2152 goto again
; /* Must restart, chain has been munged. */
2159 /* If a symtab or psymtab for filename NAME is found, free it along
2160 with any dependent breakpoints, displays, etc.
2161 Used when loading new versions of object modules with the "add-file"
2162 command. This is only called on the top-level symtab or psymtab's name;
2163 it is not called for subsidiary files such as .h files.
2165 Return value is 1 if we blew away the environment, 0 if not.
2166 FIXME. The return value appears to never be used.
2168 FIXME. I think this is not the best way to do this. We should
2169 work on being gentler to the environment while still cleaning up
2170 all stray pointers into the freed symtab. */
2173 free_named_symtabs (char *name
)
2176 /* FIXME: With the new method of each objfile having it's own
2177 psymtab list, this function needs serious rethinking. In particular,
2178 why was it ever necessary to toss psymtabs with specific compilation
2179 unit filenames, as opposed to all psymtabs from a particular symbol
2181 Well, the answer is that some systems permit reloading of particular
2182 compilation units. We want to blow away any old info about these
2183 compilation units, regardless of which objfiles they arrived in. --gnu. */
2185 register struct symtab
*s
;
2186 register struct symtab
*prev
;
2187 register struct partial_symtab
*ps
;
2188 struct blockvector
*bv
;
2191 /* We only wack things if the symbol-reload switch is set. */
2192 if (!symbol_reloading
)
2195 /* Some symbol formats have trouble providing file names... */
2196 if (name
== 0 || *name
== '\0')
2199 /* Look for a psymtab with the specified name. */
2202 for (ps
= partial_symtab_list
; ps
; ps
= ps
->next
)
2204 if (STREQ (name
, ps
->filename
))
2206 cashier_psymtab (ps
); /* Blow it away...and its little dog, too. */
2207 goto again2
; /* Must restart, chain has been munged */
2211 /* Look for a symtab with the specified name. */
2213 for (s
= symtab_list
; s
; s
= s
->next
)
2215 if (STREQ (name
, s
->filename
))
2222 if (s
== symtab_list
)
2223 symtab_list
= s
->next
;
2225 prev
->next
= s
->next
;
2227 /* For now, queue a delete for all breakpoints, displays, etc., whether
2228 or not they depend on the symtab being freed. This should be
2229 changed so that only those data structures affected are deleted. */
2231 /* But don't delete anything if the symtab is empty.
2232 This test is necessary due to a bug in "dbxread.c" that
2233 causes empty symtabs to be created for N_SO symbols that
2234 contain the pathname of the object file. (This problem
2235 has been fixed in GDB 3.9x). */
2237 bv
= BLOCKVECTOR (s
);
2238 if (BLOCKVECTOR_NBLOCKS (bv
) > 2
2239 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
))
2240 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)))
2242 complain (&oldsyms_complaint
, name
);
2244 clear_symtab_users_queued
++;
2245 make_cleanup (clear_symtab_users_once
, 0);
2250 complain (&empty_symtab_complaint
, name
);
2257 /* It is still possible that some breakpoints will be affected
2258 even though no symtab was found, since the file might have
2259 been compiled without debugging, and hence not be associated
2260 with a symtab. In order to handle this correctly, we would need
2261 to keep a list of text address ranges for undebuggable files.
2262 For now, we do nothing, since this is a fairly obscure case. */
2266 /* FIXME, what about the minimal symbol table? */
2273 /* Allocate and partially fill a partial symtab. It will be
2274 completely filled at the end of the symbol list.
2276 FILENAME is the name of the symbol-file we are reading from. */
2278 struct partial_symtab
*
2279 start_psymtab_common (struct objfile
*objfile
,
2280 struct section_offsets
*section_offsets
, char *filename
,
2281 CORE_ADDR textlow
, struct partial_symbol
**global_syms
,
2282 struct partial_symbol
**static_syms
)
2284 struct partial_symtab
*psymtab
;
2286 psymtab
= allocate_psymtab (filename
, objfile
);
2287 psymtab
->section_offsets
= section_offsets
;
2288 psymtab
->textlow
= textlow
;
2289 psymtab
->texthigh
= psymtab
->textlow
; /* default */
2290 psymtab
->globals_offset
= global_syms
- objfile
->global_psymbols
.list
;
2291 psymtab
->statics_offset
= static_syms
- objfile
->static_psymbols
.list
;
2295 /* Add a symbol with a long value to a psymtab.
2296 Since one arg is a struct, we pass in a ptr and deref it (sigh). */
2299 add_psymbol_to_list (char *name
, int namelength
, namespace_enum
namespace,
2300 enum address_class
class,
2301 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2302 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2303 enum language language
, struct objfile
*objfile
)
2305 register struct partial_symbol
*psym
;
2306 char *buf
= alloca (namelength
+ 1);
2307 /* psymbol is static so that there will be no uninitialized gaps in the
2308 structure which might contain random data, causing cache misses in
2310 static struct partial_symbol psymbol
;
2312 /* Create local copy of the partial symbol */
2313 memcpy (buf
, name
, namelength
);
2314 buf
[namelength
] = '\0';
2315 SYMBOL_NAME (&psymbol
) = bcache (buf
, namelength
+ 1, &objfile
->psymbol_cache
);
2316 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2319 SYMBOL_VALUE (&psymbol
) = val
;
2323 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2325 SYMBOL_SECTION (&psymbol
) = 0;
2326 SYMBOL_LANGUAGE (&psymbol
) = language
;
2327 PSYMBOL_NAMESPACE (&psymbol
) = namespace;
2328 PSYMBOL_CLASS (&psymbol
) = class;
2329 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2331 /* Stash the partial symbol away in the cache */
2332 psym
= bcache (&psymbol
, sizeof (struct partial_symbol
), &objfile
->psymbol_cache
);
2334 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2335 if (list
->next
>= list
->list
+ list
->size
)
2337 extend_psymbol_list (list
, objfile
);
2339 *list
->next
++ = psym
;
2340 OBJSTAT (objfile
, n_psyms
++);
2343 /* Add a symbol with a long value to a psymtab. This differs from
2344 * add_psymbol_to_list above in taking both a mangled and a demangled
2348 add_psymbol_with_dem_name_to_list (char *name
, int namelength
, char *dem_name
,
2349 int dem_namelength
, namespace_enum
namespace,
2350 enum address_class
class,
2351 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2352 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2353 enum language language
,
2354 struct objfile
*objfile
)
2356 register struct partial_symbol
*psym
;
2357 char *buf
= alloca (namelength
+ 1);
2358 /* psymbol is static so that there will be no uninitialized gaps in the
2359 structure which might contain random data, causing cache misses in
2361 static struct partial_symbol psymbol
;
2363 /* Create local copy of the partial symbol */
2365 memcpy (buf
, name
, namelength
);
2366 buf
[namelength
] = '\0';
2367 SYMBOL_NAME (&psymbol
) = bcache (buf
, namelength
+ 1, &objfile
->psymbol_cache
);
2369 buf
= alloca (dem_namelength
+ 1);
2370 memcpy (buf
, dem_name
, dem_namelength
);
2371 buf
[dem_namelength
] = '\0';
2376 case language_cplus
:
2377 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol
) =
2378 bcache (buf
, dem_namelength
+ 1, &objfile
->psymbol_cache
);
2380 case language_chill
:
2381 SYMBOL_CHILL_DEMANGLED_NAME (&psymbol
) =
2382 bcache (buf
, dem_namelength
+ 1, &objfile
->psymbol_cache
);
2384 /* FIXME What should be done for the default case? Ignoring for now. */
2387 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2390 SYMBOL_VALUE (&psymbol
) = val
;
2394 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2396 SYMBOL_SECTION (&psymbol
) = 0;
2397 SYMBOL_LANGUAGE (&psymbol
) = language
;
2398 PSYMBOL_NAMESPACE (&psymbol
) = namespace;
2399 PSYMBOL_CLASS (&psymbol
) = class;
2400 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2402 /* Stash the partial symbol away in the cache */
2403 psym
= bcache (&psymbol
, sizeof (struct partial_symbol
), &objfile
->psymbol_cache
);
2405 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2406 if (list
->next
>= list
->list
+ list
->size
)
2408 extend_psymbol_list (list
, objfile
);
2410 *list
->next
++ = psym
;
2411 OBJSTAT (objfile
, n_psyms
++);
2414 /* Initialize storage for partial symbols. */
2417 init_psymbol_list (struct objfile
*objfile
, int total_symbols
)
2419 /* Free any previously allocated psymbol lists. */
2421 if (objfile
->global_psymbols
.list
)
2423 mfree (objfile
->md
, (PTR
) objfile
->global_psymbols
.list
);
2425 if (objfile
->static_psymbols
.list
)
2427 mfree (objfile
->md
, (PTR
) objfile
->static_psymbols
.list
);
2430 /* Current best guess is that approximately a twentieth
2431 of the total symbols (in a debugging file) are global or static
2434 objfile
->global_psymbols
.size
= total_symbols
/ 10;
2435 objfile
->static_psymbols
.size
= total_symbols
/ 10;
2437 if (objfile
->global_psymbols
.size
> 0)
2439 objfile
->global_psymbols
.next
=
2440 objfile
->global_psymbols
.list
= (struct partial_symbol
**)
2441 xmmalloc (objfile
->md
, (objfile
->global_psymbols
.size
2442 * sizeof (struct partial_symbol
*)));
2444 if (objfile
->static_psymbols
.size
> 0)
2446 objfile
->static_psymbols
.next
=
2447 objfile
->static_psymbols
.list
= (struct partial_symbol
**)
2448 xmmalloc (objfile
->md
, (objfile
->static_psymbols
.size
2449 * sizeof (struct partial_symbol
*)));
2454 The following code implements an abstraction for debugging overlay sections.
2456 The target model is as follows:
2457 1) The gnu linker will permit multiple sections to be mapped into the
2458 same VMA, each with its own unique LMA (or load address).
2459 2) It is assumed that some runtime mechanism exists for mapping the
2460 sections, one by one, from the load address into the VMA address.
2461 3) This code provides a mechanism for gdb to keep track of which
2462 sections should be considered to be mapped from the VMA to the LMA.
2463 This information is used for symbol lookup, and memory read/write.
2464 For instance, if a section has been mapped then its contents
2465 should be read from the VMA, otherwise from the LMA.
2467 Two levels of debugger support for overlays are available. One is
2468 "manual", in which the debugger relies on the user to tell it which
2469 overlays are currently mapped. This level of support is
2470 implemented entirely in the core debugger, and the information about
2471 whether a section is mapped is kept in the objfile->obj_section table.
2473 The second level of support is "automatic", and is only available if
2474 the target-specific code provides functionality to read the target's
2475 overlay mapping table, and translate its contents for the debugger
2476 (by updating the mapped state information in the obj_section tables).
2478 The interface is as follows:
2480 overlay map <name> -- tell gdb to consider this section mapped
2481 overlay unmap <name> -- tell gdb to consider this section unmapped
2482 overlay list -- list the sections that GDB thinks are mapped
2483 overlay read-target -- get the target's state of what's mapped
2484 overlay off/manual/auto -- set overlay debugging state
2485 Functional interface:
2486 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2487 section, return that section.
2488 find_pc_overlay(pc): find any overlay section that contains
2489 the pc, either in its VMA or its LMA
2490 overlay_is_mapped(sect): true if overlay is marked as mapped
2491 section_is_overlay(sect): true if section's VMA != LMA
2492 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2493 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2494 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2495 overlay_mapped_address(...): map an address from section's LMA to VMA
2496 overlay_unmapped_address(...): map an address from section's VMA to LMA
2497 symbol_overlayed_address(...): Return a "current" address for symbol:
2498 either in VMA or LMA depending on whether
2499 the symbol's section is currently mapped
2502 /* Overlay debugging state: */
2504 int overlay_debugging
= 0; /* 0 == off, 1 == manual, -1 == auto */
2505 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
2507 /* Target vector for refreshing overlay mapped state */
2508 static void simple_overlay_update (struct obj_section
*);
2509 void (*target_overlay_update
) (struct obj_section
*) = simple_overlay_update
;
2511 /* Function: section_is_overlay (SECTION)
2512 Returns true if SECTION has VMA not equal to LMA, ie.
2513 SECTION is loaded at an address different from where it will "run". */
2516 section_is_overlay (asection
*section
)
2518 if (overlay_debugging
)
2519 if (section
&& section
->lma
!= 0 &&
2520 section
->vma
!= section
->lma
)
2526 /* Function: overlay_invalidate_all (void)
2527 Invalidate the mapped state of all overlay sections (mark it as stale). */
2530 overlay_invalidate_all (void)
2532 struct objfile
*objfile
;
2533 struct obj_section
*sect
;
2535 ALL_OBJSECTIONS (objfile
, sect
)
2536 if (section_is_overlay (sect
->the_bfd_section
))
2537 sect
->ovly_mapped
= -1;
2540 /* Function: overlay_is_mapped (SECTION)
2541 Returns true if section is an overlay, and is currently mapped.
2542 Private: public access is thru function section_is_mapped.
2544 Access to the ovly_mapped flag is restricted to this function, so
2545 that we can do automatic update. If the global flag
2546 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2547 overlay_invalidate_all. If the mapped state of the particular
2548 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2551 overlay_is_mapped (struct obj_section
*osect
)
2553 if (osect
== 0 || !section_is_overlay (osect
->the_bfd_section
))
2556 switch (overlay_debugging
)
2560 return 0; /* overlay debugging off */
2561 case -1: /* overlay debugging automatic */
2562 /* Unles there is a target_overlay_update function,
2563 there's really nothing useful to do here (can't really go auto) */
2564 if (target_overlay_update
)
2566 if (overlay_cache_invalid
)
2568 overlay_invalidate_all ();
2569 overlay_cache_invalid
= 0;
2571 if (osect
->ovly_mapped
== -1)
2572 (*target_overlay_update
) (osect
);
2574 /* fall thru to manual case */
2575 case 1: /* overlay debugging manual */
2576 return osect
->ovly_mapped
== 1;
2580 /* Function: section_is_mapped
2581 Returns true if section is an overlay, and is currently mapped. */
2584 section_is_mapped (asection
*section
)
2586 struct objfile
*objfile
;
2587 struct obj_section
*osect
;
2589 if (overlay_debugging
)
2590 if (section
&& section_is_overlay (section
))
2591 ALL_OBJSECTIONS (objfile
, osect
)
2592 if (osect
->the_bfd_section
== section
)
2593 return overlay_is_mapped (osect
);
2598 /* Function: pc_in_unmapped_range
2599 If PC falls into the lma range of SECTION, return true, else false. */
2602 pc_in_unmapped_range (CORE_ADDR pc
, asection
*section
)
2606 if (overlay_debugging
)
2607 if (section
&& section_is_overlay (section
))
2609 size
= bfd_get_section_size_before_reloc (section
);
2610 if (section
->lma
<= pc
&& pc
< section
->lma
+ size
)
2616 /* Function: pc_in_mapped_range
2617 If PC falls into the vma range of SECTION, return true, else false. */
2620 pc_in_mapped_range (CORE_ADDR pc
, asection
*section
)
2624 if (overlay_debugging
)
2625 if (section
&& section_is_overlay (section
))
2627 size
= bfd_get_section_size_before_reloc (section
);
2628 if (section
->vma
<= pc
&& pc
< section
->vma
+ size
)
2635 /* Return true if the mapped ranges of sections A and B overlap, false
2638 sections_overlap (asection
*a
, asection
*b
)
2640 CORE_ADDR a_start
= a
->vma
;
2641 CORE_ADDR a_end
= a
->vma
+ bfd_get_section_size_before_reloc (a
);
2642 CORE_ADDR b_start
= b
->vma
;
2643 CORE_ADDR b_end
= b
->vma
+ bfd_get_section_size_before_reloc (b
);
2645 return (a_start
< b_end
&& b_start
< a_end
);
2648 /* Function: overlay_unmapped_address (PC, SECTION)
2649 Returns the address corresponding to PC in the unmapped (load) range.
2650 May be the same as PC. */
2653 overlay_unmapped_address (CORE_ADDR pc
, asection
*section
)
2655 if (overlay_debugging
)
2656 if (section
&& section_is_overlay (section
) &&
2657 pc_in_mapped_range (pc
, section
))
2658 return pc
+ section
->lma
- section
->vma
;
2663 /* Function: overlay_mapped_address (PC, SECTION)
2664 Returns the address corresponding to PC in the mapped (runtime) range.
2665 May be the same as PC. */
2668 overlay_mapped_address (CORE_ADDR pc
, asection
*section
)
2670 if (overlay_debugging
)
2671 if (section
&& section_is_overlay (section
) &&
2672 pc_in_unmapped_range (pc
, section
))
2673 return pc
+ section
->vma
- section
->lma
;
2679 /* Function: symbol_overlayed_address
2680 Return one of two addresses (relative to the VMA or to the LMA),
2681 depending on whether the section is mapped or not. */
2684 symbol_overlayed_address (CORE_ADDR address
, asection
*section
)
2686 if (overlay_debugging
)
2688 /* If the symbol has no section, just return its regular address. */
2691 /* If the symbol's section is not an overlay, just return its address */
2692 if (!section_is_overlay (section
))
2694 /* If the symbol's section is mapped, just return its address */
2695 if (section_is_mapped (section
))
2698 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
2699 * then return its LOADED address rather than its vma address!!
2701 return overlay_unmapped_address (address
, section
);
2706 /* Function: find_pc_overlay (PC)
2707 Return the best-match overlay section for PC:
2708 If PC matches a mapped overlay section's VMA, return that section.
2709 Else if PC matches an unmapped section's VMA, return that section.
2710 Else if PC matches an unmapped section's LMA, return that section. */
2713 find_pc_overlay (CORE_ADDR pc
)
2715 struct objfile
*objfile
;
2716 struct obj_section
*osect
, *best_match
= NULL
;
2718 if (overlay_debugging
)
2719 ALL_OBJSECTIONS (objfile
, osect
)
2720 if (section_is_overlay (osect
->the_bfd_section
))
2722 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
))
2724 if (overlay_is_mapped (osect
))
2725 return osect
->the_bfd_section
;
2729 else if (pc_in_unmapped_range (pc
, osect
->the_bfd_section
))
2732 return best_match
? best_match
->the_bfd_section
: NULL
;
2735 /* Function: find_pc_mapped_section (PC)
2736 If PC falls into the VMA address range of an overlay section that is
2737 currently marked as MAPPED, return that section. Else return NULL. */
2740 find_pc_mapped_section (CORE_ADDR pc
)
2742 struct objfile
*objfile
;
2743 struct obj_section
*osect
;
2745 if (overlay_debugging
)
2746 ALL_OBJSECTIONS (objfile
, osect
)
2747 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
) &&
2748 overlay_is_mapped (osect
))
2749 return osect
->the_bfd_section
;
2754 /* Function: list_overlays_command
2755 Print a list of mapped sections and their PC ranges */
2758 list_overlays_command (char *args
, int from_tty
)
2761 struct objfile
*objfile
;
2762 struct obj_section
*osect
;
2764 if (overlay_debugging
)
2765 ALL_OBJSECTIONS (objfile
, osect
)
2766 if (overlay_is_mapped (osect
))
2772 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
2773 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
2774 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
2775 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
2777 printf_filtered ("Section %s, loaded at ", name
);
2778 print_address_numeric (lma
, 1, gdb_stdout
);
2779 puts_filtered (" - ");
2780 print_address_numeric (lma
+ size
, 1, gdb_stdout
);
2781 printf_filtered (", mapped at ");
2782 print_address_numeric (vma
, 1, gdb_stdout
);
2783 puts_filtered (" - ");
2784 print_address_numeric (vma
+ size
, 1, gdb_stdout
);
2785 puts_filtered ("\n");
2790 printf_filtered ("No sections are mapped.\n");
2793 /* Function: map_overlay_command
2794 Mark the named section as mapped (ie. residing at its VMA address). */
2797 map_overlay_command (char *args
, int from_tty
)
2799 struct objfile
*objfile
, *objfile2
;
2800 struct obj_section
*sec
, *sec2
;
2803 if (!overlay_debugging
)
2805 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
2806 the 'overlay manual' command.");
2808 if (args
== 0 || *args
== 0)
2809 error ("Argument required: name of an overlay section");
2811 /* First, find a section matching the user supplied argument */
2812 ALL_OBJSECTIONS (objfile
, sec
)
2813 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
2815 /* Now, check to see if the section is an overlay. */
2816 bfdsec
= sec
->the_bfd_section
;
2817 if (!section_is_overlay (bfdsec
))
2818 continue; /* not an overlay section */
2820 /* Mark the overlay as "mapped" */
2821 sec
->ovly_mapped
= 1;
2823 /* Next, make a pass and unmap any sections that are
2824 overlapped by this new section: */
2825 ALL_OBJSECTIONS (objfile2
, sec2
)
2826 if (sec2
->ovly_mapped
2828 && sec
->the_bfd_section
!= sec2
->the_bfd_section
2829 && sections_overlap (sec
->the_bfd_section
,
2830 sec2
->the_bfd_section
))
2833 printf_filtered ("Note: section %s unmapped by overlap\n",
2834 bfd_section_name (objfile
->obfd
,
2835 sec2
->the_bfd_section
));
2836 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
2840 error ("No overlay section called %s", args
);
2843 /* Function: unmap_overlay_command
2844 Mark the overlay section as unmapped
2845 (ie. resident in its LMA address range, rather than the VMA range). */
2848 unmap_overlay_command (char *args
, int from_tty
)
2850 struct objfile
*objfile
;
2851 struct obj_section
*sec
;
2853 if (!overlay_debugging
)
2855 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
2856 the 'overlay manual' command.");
2858 if (args
== 0 || *args
== 0)
2859 error ("Argument required: name of an overlay section");
2861 /* First, find a section matching the user supplied argument */
2862 ALL_OBJSECTIONS (objfile
, sec
)
2863 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
2865 if (!sec
->ovly_mapped
)
2866 error ("Section %s is not mapped", args
);
2867 sec
->ovly_mapped
= 0;
2870 error ("No overlay section called %s", args
);
2873 /* Function: overlay_auto_command
2874 A utility command to turn on overlay debugging.
2875 Possibly this should be done via a set/show command. */
2878 overlay_auto_command (char *args
, int from_tty
)
2880 overlay_debugging
= -1;
2882 printf_filtered ("Automatic overlay debugging enabled.");
2885 /* Function: overlay_manual_command
2886 A utility command to turn on overlay debugging.
2887 Possibly this should be done via a set/show command. */
2890 overlay_manual_command (char *args
, int from_tty
)
2892 overlay_debugging
= 1;
2894 printf_filtered ("Overlay debugging enabled.");
2897 /* Function: overlay_off_command
2898 A utility command to turn on overlay debugging.
2899 Possibly this should be done via a set/show command. */
2902 overlay_off_command (char *args
, int from_tty
)
2904 overlay_debugging
= 0;
2906 printf_filtered ("Overlay debugging disabled.");
2910 overlay_load_command (char *args
, int from_tty
)
2912 if (target_overlay_update
)
2913 (*target_overlay_update
) (NULL
);
2915 error ("This target does not know how to read its overlay state.");
2918 /* Function: overlay_command
2919 A place-holder for a mis-typed command */
2921 /* Command list chain containing all defined "overlay" subcommands. */
2922 struct cmd_list_element
*overlaylist
;
2925 overlay_command (char *args
, int from_tty
)
2928 ("\"overlay\" must be followed by the name of an overlay command.\n");
2929 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
2933 /* Target Overlays for the "Simplest" overlay manager:
2935 This is GDB's default target overlay layer. It works with the
2936 minimal overlay manager supplied as an example by Cygnus. The
2937 entry point is via a function pointer "target_overlay_update",
2938 so targets that use a different runtime overlay manager can
2939 substitute their own overlay_update function and take over the
2942 The overlay_update function pokes around in the target's data structures
2943 to see what overlays are mapped, and updates GDB's overlay mapping with
2946 In this simple implementation, the target data structures are as follows:
2947 unsigned _novlys; /# number of overlay sections #/
2948 unsigned _ovly_table[_novlys][4] = {
2949 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
2950 {..., ..., ..., ...},
2952 unsigned _novly_regions; /# number of overlay regions #/
2953 unsigned _ovly_region_table[_novly_regions][3] = {
2954 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
2957 These functions will attempt to update GDB's mappedness state in the
2958 symbol section table, based on the target's mappedness state.
2960 To do this, we keep a cached copy of the target's _ovly_table, and
2961 attempt to detect when the cached copy is invalidated. The main
2962 entry point is "simple_overlay_update(SECT), which looks up SECT in
2963 the cached table and re-reads only the entry for that section from
2964 the target (whenever possible).
2967 /* Cached, dynamically allocated copies of the target data structures: */
2968 static unsigned (*cache_ovly_table
)[4] = 0;
2970 static unsigned (*cache_ovly_region_table
)[3] = 0;
2972 static unsigned cache_novlys
= 0;
2974 static unsigned cache_novly_regions
= 0;
2976 static CORE_ADDR cache_ovly_table_base
= 0;
2978 static CORE_ADDR cache_ovly_region_table_base
= 0;
2982 VMA
, SIZE
, LMA
, MAPPED
2984 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
2986 /* Throw away the cached copy of _ovly_table */
2988 simple_free_overlay_table (void)
2990 if (cache_ovly_table
)
2991 xfree (cache_ovly_table
);
2993 cache_ovly_table
= NULL
;
2994 cache_ovly_table_base
= 0;
2998 /* Throw away the cached copy of _ovly_region_table */
3000 simple_free_overlay_region_table (void)
3002 if (cache_ovly_region_table
)
3003 xfree (cache_ovly_region_table
);
3004 cache_novly_regions
= 0;
3005 cache_ovly_region_table
= NULL
;
3006 cache_ovly_region_table_base
= 0;
3010 /* Read an array of ints from the target into a local buffer.
3011 Convert to host order. int LEN is number of ints */
3013 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
, int len
)
3015 char *buf
= alloca (len
* TARGET_LONG_BYTES
);
3018 read_memory (memaddr
, buf
, len
* TARGET_LONG_BYTES
);
3019 for (i
= 0; i
< len
; i
++)
3020 myaddr
[i
] = extract_unsigned_integer (TARGET_LONG_BYTES
* i
+ buf
,
3024 /* Find and grab a copy of the target _ovly_table
3025 (and _novlys, which is needed for the table's size) */
3027 simple_read_overlay_table (void)
3029 struct minimal_symbol
*msym
;
3031 simple_free_overlay_table ();
3032 msym
= lookup_minimal_symbol ("_novlys", 0, 0);
3034 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
3036 return 0; /* failure */
3037 cache_ovly_table
= (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3038 if (cache_ovly_table
!= NULL
)
3040 msym
= lookup_minimal_symbol ("_ovly_table", 0, 0);
3043 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3044 read_target_long_array (cache_ovly_table_base
,
3045 (int *) cache_ovly_table
,
3049 return 0; /* failure */
3052 return 0; /* failure */
3053 return 1; /* SUCCESS */
3057 /* Find and grab a copy of the target _ovly_region_table
3058 (and _novly_regions, which is needed for the table's size) */
3060 simple_read_overlay_region_table (void)
3062 struct minimal_symbol
*msym
;
3064 simple_free_overlay_region_table ();
3065 msym
= lookup_minimal_symbol ("_novly_regions", 0, 0);
3067 cache_novly_regions
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
3069 return 0; /* failure */
3070 cache_ovly_region_table
= (void *) xmalloc (cache_novly_regions
* 12);
3071 if (cache_ovly_region_table
!= NULL
)
3073 msym
= lookup_minimal_symbol ("_ovly_region_table", 0, 0);
3076 cache_ovly_region_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3077 read_target_long_array (cache_ovly_region_table_base
,
3078 (int *) cache_ovly_region_table
,
3079 cache_novly_regions
* 3);
3082 return 0; /* failure */
3085 return 0; /* failure */
3086 return 1; /* SUCCESS */
3090 /* Function: simple_overlay_update_1
3091 A helper function for simple_overlay_update. Assuming a cached copy
3092 of _ovly_table exists, look through it to find an entry whose vma,
3093 lma and size match those of OSECT. Re-read the entry and make sure
3094 it still matches OSECT (else the table may no longer be valid).
3095 Set OSECT's mapped state to match the entry. Return: 1 for
3096 success, 0 for failure. */
3099 simple_overlay_update_1 (struct obj_section
*osect
)
3103 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3104 for (i
= 0; i
< cache_novlys
; i
++)
3105 if (cache_ovly_table
[i
][VMA
] == osect
->the_bfd_section
->vma
&&
3106 cache_ovly_table
[i
][LMA
] == osect
->the_bfd_section
->lma
/* &&
3107 cache_ovly_table[i][SIZE] == size */ )
3109 read_target_long_array (cache_ovly_table_base
+ i
* TARGET_LONG_BYTES
,
3110 (int *) cache_ovly_table
[i
], 4);
3111 if (cache_ovly_table
[i
][VMA
] == osect
->the_bfd_section
->vma
&&
3112 cache_ovly_table
[i
][LMA
] == osect
->the_bfd_section
->lma
/* &&
3113 cache_ovly_table[i][SIZE] == size */ )
3115 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3118 else /* Warning! Warning! Target's ovly table has changed! */
3124 /* Function: simple_overlay_update
3125 If OSECT is NULL, then update all sections' mapped state
3126 (after re-reading the entire target _ovly_table).
3127 If OSECT is non-NULL, then try to find a matching entry in the
3128 cached ovly_table and update only OSECT's mapped state.
3129 If a cached entry can't be found or the cache isn't valid, then
3130 re-read the entire cache, and go ahead and update all sections. */
3133 simple_overlay_update (struct obj_section
*osect
)
3135 struct objfile
*objfile
;
3137 /* Were we given an osect to look up? NULL means do all of them. */
3139 /* Have we got a cached copy of the target's overlay table? */
3140 if (cache_ovly_table
!= NULL
)
3141 /* Does its cached location match what's currently in the symtab? */
3142 if (cache_ovly_table_base
==
3143 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", 0, 0)))
3144 /* Then go ahead and try to look up this single section in the cache */
3145 if (simple_overlay_update_1 (osect
))
3146 /* Found it! We're done. */
3149 /* Cached table no good: need to read the entire table anew.
3150 Or else we want all the sections, in which case it's actually
3151 more efficient to read the whole table in one block anyway. */
3153 if (simple_read_overlay_table () == 0) /* read failed? No table? */
3155 warning ("Failed to read the target overlay mapping table.");
3158 /* Now may as well update all sections, even if only one was requested. */
3159 ALL_OBJSECTIONS (objfile
, osect
)
3160 if (section_is_overlay (osect
->the_bfd_section
))
3164 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3165 for (i
= 0; i
< cache_novlys
; i
++)
3166 if (cache_ovly_table
[i
][VMA
] == osect
->the_bfd_section
->vma
&&
3167 cache_ovly_table
[i
][LMA
] == osect
->the_bfd_section
->lma
/* &&
3168 cache_ovly_table[i][SIZE] == size */ )
3169 { /* obj_section matches i'th entry in ovly_table */
3170 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3171 break; /* finished with inner for loop: break out */
3178 _initialize_symfile (void)
3180 struct cmd_list_element
*c
;
3182 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
,
3183 "Load symbol table from executable file FILE.\n\
3184 The `file' command can also load symbol tables, as well as setting the file\n\
3185 to execute.", &cmdlist
);
3186 c
->completer
= filename_completer
;
3188 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
,
3189 "Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3190 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3191 ADDR is the starting address of the file's text.\n\
3192 The optional arguments are section-name section-address pairs and\n\
3193 should be specified if the data and bss segments are not contiguous\n\
3194 with the text. SECT is a section name to be loaded at SECT_ADDR.",
3196 c
->completer
= filename_completer
;
3198 c
= add_cmd ("add-shared-symbol-files", class_files
,
3199 add_shared_symbol_files_command
,
3200 "Load the symbols from shared objects in the dynamic linker's link map.",
3202 c
= add_alias_cmd ("assf", "add-shared-symbol-files", class_files
, 1,
3205 c
= add_cmd ("load", class_files
, load_command
,
3206 "Dynamically load FILE into the running program, and record its symbols\n\
3207 for access from GDB.", &cmdlist
);
3208 c
->completer
= filename_completer
;
3211 (add_set_cmd ("symbol-reloading", class_support
, var_boolean
,
3212 (char *) &symbol_reloading
,
3213 "Set dynamic symbol table reloading multiple times in one run.",
3217 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3218 "Commands for debugging overlays.", &overlaylist
,
3219 "overlay ", 0, &cmdlist
);
3221 add_com_alias ("ovly", "overlay", class_alias
, 1);
3222 add_com_alias ("ov", "overlay", class_alias
, 1);
3224 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3225 "Assert that an overlay section is mapped.", &overlaylist
);
3227 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3228 "Assert that an overlay section is unmapped.", &overlaylist
);
3230 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3231 "List mappings of overlay sections.", &overlaylist
);
3233 add_cmd ("manual", class_support
, overlay_manual_command
,
3234 "Enable overlay debugging.", &overlaylist
);
3235 add_cmd ("off", class_support
, overlay_off_command
,
3236 "Disable overlay debugging.", &overlaylist
);
3237 add_cmd ("auto", class_support
, overlay_auto_command
,
3238 "Enable automatic overlay debugging.", &overlaylist
);
3239 add_cmd ("load-target", class_support
, overlay_load_command
,
3240 "Read the overlay mapping state from the target.", &overlaylist
);
3242 /* Filename extension to source language lookup table: */
3243 init_filename_language_table ();
3244 c
= add_set_cmd ("extension-language", class_files
, var_string_noescape
,
3246 "Set mapping between filename extension and source language.\n\
3247 Usage: set extension-language .foo bar",
3249 c
->function
.cfunc
= set_ext_lang_command
;
3251 add_info ("extensions", info_ext_lang_command
,
3252 "All filename extensions associated with a source language.");
3255 (add_set_cmd ("download-write-size", class_obscure
,
3256 var_integer
, (char *) &download_write_size
,
3257 "Set the write size used when downloading a program.\n"
3258 "Only used when downloading a program onto a remote\n"
3259 "target. Specify zero, or a negative value, to disable\n"
3260 "blocked writes. The actual size of each transfer is also\n"
3261 "limited by the size of the target packet and the memory\n"