1 /* Generic symbol file reading for the GNU debugger, GDB.
2 Copyright 1990-1996, 1998, 2000 Free Software Foundation, Inc.
3 Contributed by Cygnus Support, using pieces from other GDB modules.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
32 #include "breakpoint.h"
34 #include "complaints.h"
36 #include "inferior.h" /* for write_pc */
37 #include "gdb-stabs.h"
41 #include <sys/types.h>
43 #include "gdb_string.h"
54 /* Some HP-UX related globals to clear when a new "main"
55 symbol file is loaded. HP-specific. */
57 extern int hp_som_som_object_present
;
58 extern int hp_cxx_exception_support_initialized
;
59 #define RESET_HP_UX_GLOBALS() do {\
60 hp_som_som_object_present = 0; /* indicates HP-compiled code */ \
61 hp_cxx_exception_support_initialized = 0; /* must reinitialize exception stuff */ \
65 int (*ui_load_progress_hook
) (const char *section
, unsigned long num
);
66 void (*show_load_progress
) (const char *section
,
67 unsigned long section_sent
,
68 unsigned long section_size
,
69 unsigned long total_sent
,
70 unsigned long total_size
);
71 void (*pre_add_symbol_hook
) (char *);
72 void (*post_add_symbol_hook
) (void);
73 void (*target_new_objfile_hook
) (struct objfile
*);
75 static void clear_symtab_users_cleanup (void *ignore
);
77 /* Global variables owned by this file */
78 int readnow_symbol_files
; /* Read full symbols immediately */
80 struct complaint oldsyms_complaint
=
82 "Replacing old symbols for `%s'", 0, 0
85 struct complaint empty_symtab_complaint
=
87 "Empty symbol table found for `%s'", 0, 0
90 struct complaint unknown_option_complaint
=
92 "Unknown option `%s' ignored", 0, 0
95 /* External variables and functions referenced. */
97 extern int info_verbose
;
99 extern void report_transfer_performance (unsigned long, time_t, time_t);
101 /* Functions this file defines */
104 static int simple_read_overlay_region_table (void);
105 static void simple_free_overlay_region_table (void);
108 static void set_initial_language (void);
110 static void load_command (char *, int);
112 static void add_symbol_file_command (char *, int);
114 static void add_shared_symbol_files_command (char *, int);
116 static void cashier_psymtab (struct partial_symtab
*);
118 static int compare_psymbols (const void *, const void *);
120 static int compare_symbols (const void *, const void *);
122 bfd
*symfile_bfd_open (char *);
124 static void find_sym_fns (struct objfile
*);
126 static void decrement_reading_symtab (void *);
128 static void overlay_invalidate_all (void);
130 static int overlay_is_mapped (struct obj_section
*);
132 void list_overlays_command (char *, int);
134 void map_overlay_command (char *, int);
136 void unmap_overlay_command (char *, int);
138 static void overlay_auto_command (char *, int);
140 static void overlay_manual_command (char *, int);
142 static void overlay_off_command (char *, int);
144 static void overlay_load_command (char *, int);
146 static void overlay_command (char *, int);
148 static void simple_free_overlay_table (void);
150 static void read_target_long_array (CORE_ADDR
, unsigned int *, int);
152 static int simple_read_overlay_table (void);
154 static int simple_overlay_update_1 (struct obj_section
*);
156 static void add_filename_language (char *ext
, enum language lang
);
158 static void set_ext_lang_command (char *args
, int from_tty
);
160 static void info_ext_lang_command (char *args
, int from_tty
);
162 static void init_filename_language_table (void);
164 void _initialize_symfile (void);
166 /* List of all available sym_fns. On gdb startup, each object file reader
167 calls add_symtab_fns() to register information on each format it is
170 static struct sym_fns
*symtab_fns
= NULL
;
172 /* Flag for whether user will be reloading symbols multiple times.
173 Defaults to ON for VxWorks, otherwise OFF. */
175 #ifdef SYMBOL_RELOADING_DEFAULT
176 int symbol_reloading
= SYMBOL_RELOADING_DEFAULT
;
178 int symbol_reloading
= 0;
181 /* If non-zero, then on HP-UX (i.e., platforms that use somsolib.c),
182 this variable is interpreted as a threshhold. If adding a new
183 library's symbol table to those already known to the debugger would
184 exceed this threshhold, then the shlib's symbols are not added.
186 If non-zero on other platforms, shared library symbols will be added
187 automatically when the inferior is created, new libraries are loaded,
188 or when attaching to the inferior. This is almost always what users
189 will want to have happen; but for very large programs, the startup
190 time will be excessive, and so if this is a problem, the user can
191 clear this flag and then add the shared library symbols as needed.
192 Note that there is a potential for confusion, since if the shared
193 library symbols are not loaded, commands like "info fun" will *not*
194 report all the functions that are actually present.
196 Note that HP-UX interprets this variable to mean, "threshhold size
197 in megabytes, where zero means never add". Other platforms interpret
198 this variable to mean, "always add if non-zero, never add if zero."
201 int auto_solib_add
= 1;
204 /* Since this function is called from within qsort, in an ANSI environment
205 it must conform to the prototype for qsort, which specifies that the
206 comparison function takes two "void *" pointers. */
209 compare_symbols (const PTR s1p
, const PTR s2p
)
211 register struct symbol
**s1
, **s2
;
213 s1
= (struct symbol
**) s1p
;
214 s2
= (struct symbol
**) s2p
;
215 return (STRCMP (SYMBOL_SOURCE_NAME (*s1
), SYMBOL_SOURCE_NAME (*s2
)));
222 compare_psymbols -- compare two partial symbols by name
226 Given pointers to pointers to two partial symbol table entries,
227 compare them by name and return -N, 0, or +N (ala strcmp).
228 Typically used by sorting routines like qsort().
232 Does direct compare of first two characters before punting
233 and passing to strcmp for longer compares. Note that the
234 original version had a bug whereby two null strings or two
235 identically named one character strings would return the
236 comparison of memory following the null byte.
241 compare_psymbols (const PTR s1p
, const PTR s2p
)
243 register struct partial_symbol
**s1
, **s2
;
244 register char *st1
, *st2
;
246 s1
= (struct partial_symbol
**) s1p
;
247 s2
= (struct partial_symbol
**) s2p
;
248 st1
= SYMBOL_SOURCE_NAME (*s1
);
249 st2
= SYMBOL_SOURCE_NAME (*s2
);
252 if ((st1
[0] - st2
[0]) || !st1
[0])
254 return (st1
[0] - st2
[0]);
256 else if ((st1
[1] - st2
[1]) || !st1
[1])
258 return (st1
[1] - st2
[1]);
262 /* Note: I replaced the STRCMP line (commented out below)
263 * with a simpler "strcmp()" which compares the 2 strings
264 * from the beginning. (STRCMP is a macro which first compares
265 * the initial characters, then falls back on strcmp).
266 * The reason is that the STRCMP line was tickling a C compiler
267 * bug on HP-UX 10.30, which is avoided with the simpler
268 * code. The performance gain from the more complicated code
269 * is negligible, given that we have already checked the
270 * initial 2 characters above. I reported the compiler bug,
271 * and once it is fixed the original line can be put back. RT
273 /* return ( STRCMP (st1 + 2, st2 + 2)); */
274 return (strcmp (st1
, st2
));
279 sort_pst_symbols (struct partial_symtab
*pst
)
281 /* Sort the global list; don't sort the static list */
283 qsort (pst
->objfile
->global_psymbols
.list
+ pst
->globals_offset
,
284 pst
->n_global_syms
, sizeof (struct partial_symbol
*),
288 /* Call sort_block_syms to sort alphabetically the symbols of one block. */
291 sort_block_syms (register struct block
*b
)
293 qsort (&BLOCK_SYM (b
, 0), BLOCK_NSYMS (b
),
294 sizeof (struct symbol
*), compare_symbols
);
297 /* Call sort_symtab_syms to sort alphabetically
298 the symbols of each block of one symtab. */
301 sort_symtab_syms (register struct symtab
*s
)
303 register struct blockvector
*bv
;
306 register struct block
*b
;
310 bv
= BLOCKVECTOR (s
);
311 nbl
= BLOCKVECTOR_NBLOCKS (bv
);
312 for (i
= 0; i
< nbl
; i
++)
314 b
= BLOCKVECTOR_BLOCK (bv
, i
);
315 if (BLOCK_SHOULD_SORT (b
))
320 /* Make a null terminated copy of the string at PTR with SIZE characters in
321 the obstack pointed to by OBSTACKP . Returns the address of the copy.
322 Note that the string at PTR does not have to be null terminated, I.E. it
323 may be part of a larger string and we are only saving a substring. */
326 obsavestring (char *ptr
, int size
, struct obstack
*obstackp
)
328 register char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
329 /* Open-coded memcpy--saves function call time. These strings are usually
330 short. FIXME: Is this really still true with a compiler that can
333 register char *p1
= ptr
;
334 register char *p2
= p
;
335 char *end
= ptr
+ size
;
343 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
344 in the obstack pointed to by OBSTACKP. */
347 obconcat (struct obstack
*obstackp
, const char *s1
, const char *s2
,
350 register int len
= strlen (s1
) + strlen (s2
) + strlen (s3
) + 1;
351 register char *val
= (char *) obstack_alloc (obstackp
, len
);
358 /* True if we are nested inside psymtab_to_symtab. */
360 int currently_reading_symtab
= 0;
363 decrement_reading_symtab (void *dummy
)
365 currently_reading_symtab
--;
368 /* Get the symbol table that corresponds to a partial_symtab.
369 This is fast after the first time you do it. In fact, there
370 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
374 psymtab_to_symtab (register struct partial_symtab
*pst
)
376 /* If it's been looked up before, return it. */
380 /* If it has not yet been read in, read it. */
383 struct cleanup
*back_to
= make_cleanup (decrement_reading_symtab
, NULL
);
384 currently_reading_symtab
++;
385 (*pst
->read_symtab
) (pst
);
386 do_cleanups (back_to
);
392 /* Initialize entry point information for this objfile. */
395 init_entry_point_info (struct objfile
*objfile
)
397 /* Save startup file's range of PC addresses to help blockframe.c
398 decide where the bottom of the stack is. */
400 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
402 /* Executable file -- record its entry point so we'll recognize
403 the startup file because it contains the entry point. */
404 objfile
->ei
.entry_point
= bfd_get_start_address (objfile
->obfd
);
408 /* Examination of non-executable.o files. Short-circuit this stuff. */
409 objfile
->ei
.entry_point
= INVALID_ENTRY_POINT
;
411 objfile
->ei
.entry_file_lowpc
= INVALID_ENTRY_LOWPC
;
412 objfile
->ei
.entry_file_highpc
= INVALID_ENTRY_HIGHPC
;
413 objfile
->ei
.entry_func_lowpc
= INVALID_ENTRY_LOWPC
;
414 objfile
->ei
.entry_func_highpc
= INVALID_ENTRY_HIGHPC
;
415 objfile
->ei
.main_func_lowpc
= INVALID_ENTRY_LOWPC
;
416 objfile
->ei
.main_func_highpc
= INVALID_ENTRY_HIGHPC
;
419 /* Get current entry point address. */
422 entry_point_address (void)
424 return symfile_objfile
? symfile_objfile
->ei
.entry_point
: 0;
427 /* Remember the lowest-addressed loadable section we've seen.
428 This function is called via bfd_map_over_sections.
430 In case of equal vmas, the section with the largest size becomes the
431 lowest-addressed loadable section.
433 If the vmas and sizes are equal, the last section is considered the
434 lowest-addressed loadable section. */
437 find_lowest_section (bfd
*abfd
, asection
*sect
, PTR obj
)
439 asection
**lowest
= (asection
**) obj
;
441 if (0 == (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
))
444 *lowest
= sect
; /* First loadable section */
445 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
446 *lowest
= sect
; /* A lower loadable section */
447 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
448 && (bfd_section_size (abfd
, (*lowest
))
449 <= bfd_section_size (abfd
, sect
)))
454 /* Build (allocate and populate) a section_addr_info struct from
455 an existing section table. */
457 extern struct section_addr_info
*
458 build_section_addr_info_from_section_table (const struct section_table
*start
,
459 const struct section_table
*end
)
461 struct section_addr_info
*sap
;
462 const struct section_table
*stp
;
465 sap
= xmalloc (sizeof (struct section_addr_info
));
466 memset (sap
, 0, sizeof (struct section_addr_info
));
468 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
470 if (stp
->the_bfd_section
->flags
& (SEC_ALLOC
| SEC_LOAD
)
471 && oidx
< MAX_SECTIONS
)
473 sap
->other
[oidx
].addr
= stp
->addr
;
474 sap
->other
[oidx
].name
= xstrdup (stp
->the_bfd_section
->name
);
475 sap
->other
[oidx
].sectindex
= stp
->the_bfd_section
->index
;
484 /* Free all memory allocated by build_section_addr_info_from_section_table. */
487 free_section_addr_info (struct section_addr_info
*sap
)
491 for (idx
= 0; idx
< MAX_SECTIONS
; idx
++)
492 if (sap
->other
[idx
].name
)
493 free (sap
->other
[idx
].name
);
498 /* Parse the user's idea of an offset for dynamic linking, into our idea
499 of how to represent it for fast symbol reading. This is the default
500 version of the sym_fns.sym_offsets function for symbol readers that
501 don't need to do anything special. It allocates a section_offsets table
502 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
505 default_symfile_offsets (struct objfile
*objfile
,
506 struct section_addr_info
*addrs
)
509 asection
*sect
= NULL
;
511 objfile
->num_sections
= SECT_OFF_MAX
;
512 objfile
->section_offsets
= (struct section_offsets
*)
513 obstack_alloc (&objfile
->psymbol_obstack
, SIZEOF_SECTION_OFFSETS
);
514 memset (objfile
->section_offsets
, 0, SIZEOF_SECTION_OFFSETS
);
516 /* Now calculate offsets for section that were specified by the
518 for (i
= 0; i
< MAX_SECTIONS
&& addrs
->other
[i
].name
; i
++)
520 struct other_sections
*osp
;
522 osp
= &addrs
->other
[i
] ;
526 /* Record all sections in offsets */
527 /* The section_offsets in the objfile are here filled in using
529 (objfile
->section_offsets
)->offsets
[osp
->sectindex
] = osp
->addr
;
532 /* Remember the bfd indexes for the .text, .data, .bss and
535 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
537 objfile
->sect_index_text
= sect
->index
;
539 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
541 objfile
->sect_index_data
= sect
->index
;
543 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
545 objfile
->sect_index_bss
= sect
->index
;
547 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
549 objfile
->sect_index_rodata
= sect
->index
;
553 /* Process a symbol file, as either the main file or as a dynamically
556 OBJFILE is where the symbols are to be read from.
558 ADDR is the address where the text segment was loaded, unless the
559 objfile is the main symbol file, in which case it is zero.
561 MAINLINE is nonzero if this is the main symbol file, or zero if
562 it's an extra symbol file such as dynamically loaded code.
564 VERBO is nonzero if the caller has printed a verbose message about
565 the symbol reading (and complaints can be more terse about it). */
568 syms_from_objfile (struct objfile
*objfile
, struct section_addr_info
*addrs
,
569 int mainline
, int verbo
)
571 asection
*lower_sect
;
573 CORE_ADDR lower_offset
;
574 struct section_addr_info local_addr
;
575 struct cleanup
*old_chain
;
578 /* If ADDRS is NULL, initialize the local section_addr_info struct and
579 point ADDRS to it. We now establish the convention that an addr of
580 zero means no load address was specified. */
584 memset (&local_addr
, 0, sizeof (local_addr
));
588 init_entry_point_info (objfile
);
589 find_sym_fns (objfile
);
591 /* Make sure that partially constructed symbol tables will be cleaned up
592 if an error occurs during symbol reading. */
593 old_chain
= make_cleanup_free_objfile (objfile
);
597 /* We will modify the main symbol table, make sure that all its users
598 will be cleaned up if an error occurs during symbol reading. */
599 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
601 /* Since no error yet, throw away the old symbol table. */
603 if (symfile_objfile
!= NULL
)
605 free_objfile (symfile_objfile
);
606 symfile_objfile
= NULL
;
609 /* Currently we keep symbols from the add-symbol-file command.
610 If the user wants to get rid of them, they should do "symbol-file"
611 without arguments first. Not sure this is the best behavior
614 (*objfile
->sf
->sym_new_init
) (objfile
);
617 /* Convert addr into an offset rather than an absolute address.
618 We find the lowest address of a loaded segment in the objfile,
619 and assume that <addr> is where that got loaded.
621 We no longer warn if the lowest section is not a text segment (as
622 happens for the PA64 port. */
625 /* Find lowest loadable section to be used as starting point for
626 continguous sections. FIXME!! won't work without call to find
627 .text first, but this assumes text is lowest section. */
628 lower_sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
629 if (lower_sect
== NULL
)
630 bfd_map_over_sections (objfile
->obfd
, find_lowest_section
,
632 if (lower_sect
== NULL
)
633 warning ("no loadable sections found in added symbol-file %s",
636 if ((bfd_get_section_flags (objfile
->obfd
, lower_sect
) & SEC_CODE
) == 0)
637 warning ("Lowest section in %s is %s at %s",
639 bfd_section_name (objfile
->obfd
, lower_sect
),
640 paddr (bfd_section_vma (objfile
->obfd
, lower_sect
)));
641 if (lower_sect
!= NULL
)
642 lower_offset
= bfd_section_vma (objfile
->obfd
, lower_sect
);
646 /* Calculate offsets for the loadable sections.
647 FIXME! Sections must be in order of increasing loadable section
648 so that contiguous sections can use the lower-offset!!!
650 Adjust offsets if the segments are not contiguous.
651 If the section is contiguous, its offset should be set to
652 the offset of the highest loadable section lower than it
653 (the loadable section directly below it in memory).
654 this_offset = lower_offset = lower_addr - lower_orig_addr */
656 /* Calculate offsets for sections. */
657 for (i
=0 ; i
< MAX_SECTIONS
&& addrs
->other
[i
].name
; i
++)
659 if (addrs
->other
[i
].addr
!= 0)
661 sect
= bfd_get_section_by_name (objfile
->obfd
, addrs
->other
[i
].name
);
664 addrs
->other
[i
].addr
-= bfd_section_vma (objfile
->obfd
, sect
);
665 lower_offset
= addrs
->other
[i
].addr
;
666 /* This is the index used by BFD. */
667 addrs
->other
[i
].sectindex
= sect
->index
;
671 warning ("section %s not found in %s", addrs
->other
[i
].name
,
673 addrs
->other
[i
].addr
= 0;
677 addrs
->other
[i
].addr
= lower_offset
;
681 /* Initialize symbol reading routines for this objfile, allow complaints to
682 appear for this new file, and record how verbose to be, then do the
683 initial symbol reading for this file. */
685 (*objfile
->sf
->sym_init
) (objfile
);
686 clear_complaints (1, verbo
);
688 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
690 #ifndef IBM6000_TARGET
691 /* This is a SVR4/SunOS specific hack, I think. In any event, it
692 screws RS/6000. sym_offsets should be doing this sort of thing,
693 because it knows the mapping between bfd sections and
695 /* This is a hack. As far as I can tell, section offsets are not
696 target dependent. They are all set to addr with a couple of
697 exceptions. The exceptions are sysvr4 shared libraries, whose
698 offsets are kept in solib structures anyway and rs6000 xcoff
699 which handles shared libraries in a completely unique way.
701 Section offsets are built similarly, except that they are built
702 by adding addr in all cases because there is no clear mapping
703 from section_offsets into actual sections. Note that solib.c
704 has a different algorithm for finding section offsets.
706 These should probably all be collapsed into some target
707 independent form of shared library support. FIXME. */
711 struct obj_section
*s
;
713 /* Map section offsets in "addr" back to the object's
714 sections by comparing the section names with bfd's
715 section names. Then adjust the section address by
716 the offset. */ /* for gdb/13815 */
718 ALL_OBJFILE_OSECTIONS (objfile
, s
)
720 CORE_ADDR s_addr
= 0;
724 !s_addr
&& i
< MAX_SECTIONS
&& addrs
->other
[i
].name
;
726 if (strcmp (s
->the_bfd_section
->name
, addrs
->other
[i
].name
) == 0)
727 s_addr
= addrs
->other
[i
].addr
; /* end added for gdb/13815 */
729 s
->addr
-= s
->offset
;
731 s
->endaddr
-= s
->offset
;
732 s
->endaddr
+= s_addr
;
736 #endif /* not IBM6000_TARGET */
738 (*objfile
->sf
->sym_read
) (objfile
, mainline
);
740 if (!have_partial_symbols () && !have_full_symbols ())
743 printf_filtered ("(no debugging symbols found)...");
747 /* Don't allow char * to have a typename (else would get caddr_t).
748 Ditto void *. FIXME: Check whether this is now done by all the
749 symbol readers themselves (many of them now do), and if so remove
752 TYPE_NAME (lookup_pointer_type (builtin_type_char
)) = 0;
753 TYPE_NAME (lookup_pointer_type (builtin_type_void
)) = 0;
755 /* Mark the objfile has having had initial symbol read attempted. Note
756 that this does not mean we found any symbols... */
758 objfile
->flags
|= OBJF_SYMS
;
760 /* Discard cleanups as symbol reading was successful. */
762 discard_cleanups (old_chain
);
764 /* Call this after reading in a new symbol table to give target
765 dependent code a crack at the new symbols. For instance, this
766 could be used to update the values of target-specific symbols GDB
767 needs to keep track of (such as _sigtramp, or whatever). */
769 TARGET_SYMFILE_POSTREAD (objfile
);
772 /* Perform required actions after either reading in the initial
773 symbols for a new objfile, or mapping in the symbols from a reusable
777 new_symfile_objfile (struct objfile
*objfile
, int mainline
, int verbo
)
780 /* If this is the main symbol file we have to clean up all users of the
781 old main symbol file. Otherwise it is sufficient to fixup all the
782 breakpoints that may have been redefined by this symbol file. */
785 /* OK, make it the "real" symbol file. */
786 symfile_objfile
= objfile
;
788 clear_symtab_users ();
792 breakpoint_re_set ();
795 /* We're done reading the symbol file; finish off complaints. */
796 clear_complaints (0, verbo
);
799 /* Process a symbol file, as either the main file or as a dynamically
802 NAME is the file name (which will be tilde-expanded and made
803 absolute herein) (but we don't free or modify NAME itself).
804 FROM_TTY says how verbose to be. MAINLINE specifies whether this
805 is the main symbol file, or whether it's an extra symbol file such
806 as dynamically loaded code. If !mainline, ADDR is the address
807 where the text segment was loaded.
809 Upon success, returns a pointer to the objfile that was added.
810 Upon failure, jumps back to command level (never returns). */
813 symbol_file_add (char *name
, int from_tty
, struct section_addr_info
*addrs
,
814 int mainline
, int flags
)
816 struct objfile
*objfile
;
817 struct partial_symtab
*psymtab
;
820 /* Open a bfd for the file, and give user a chance to burp if we'd be
821 interactively wiping out any existing symbols. */
823 abfd
= symfile_bfd_open (name
);
825 if ((have_full_symbols () || have_partial_symbols ())
828 && !query ("Load new symbol table from \"%s\"? ", name
))
829 error ("Not confirmed.");
831 objfile
= allocate_objfile (abfd
, flags
);
833 /* If the objfile uses a mapped symbol file, and we have a psymtab for
834 it, then skip reading any symbols at this time. */
836 if ((objfile
->flags
& OBJF_MAPPED
) && (objfile
->flags
& OBJF_SYMS
))
838 /* We mapped in an existing symbol table file that already has had
839 initial symbol reading performed, so we can skip that part. Notify
840 the user that instead of reading the symbols, they have been mapped.
842 if (from_tty
|| info_verbose
)
844 printf_filtered ("Mapped symbols for %s...", name
);
846 gdb_flush (gdb_stdout
);
848 init_entry_point_info (objfile
);
849 find_sym_fns (objfile
);
853 /* We either created a new mapped symbol table, mapped an existing
854 symbol table file which has not had initial symbol reading
855 performed, or need to read an unmapped symbol table. */
856 if (from_tty
|| info_verbose
)
858 if (pre_add_symbol_hook
)
859 pre_add_symbol_hook (name
);
862 printf_filtered ("Reading symbols from %s...", name
);
864 gdb_flush (gdb_stdout
);
867 syms_from_objfile (objfile
, addrs
, mainline
, from_tty
);
870 /* We now have at least a partial symbol table. Check to see if the
871 user requested that all symbols be read on initial access via either
872 the gdb startup command line or on a per symbol file basis. Expand
873 all partial symbol tables for this objfile if so. */
875 if ((flags
& OBJF_READNOW
) || readnow_symbol_files
)
877 if (from_tty
|| info_verbose
)
879 printf_filtered ("expanding to full symbols...");
881 gdb_flush (gdb_stdout
);
884 for (psymtab
= objfile
->psymtabs
;
886 psymtab
= psymtab
->next
)
888 psymtab_to_symtab (psymtab
);
892 if (from_tty
|| info_verbose
)
894 if (post_add_symbol_hook
)
895 post_add_symbol_hook ();
898 printf_filtered ("done.\n");
899 gdb_flush (gdb_stdout
);
903 new_symfile_objfile (objfile
, mainline
, from_tty
);
905 if (target_new_objfile_hook
)
906 target_new_objfile_hook (objfile
);
911 /* This is the symbol-file command. Read the file, analyze its
912 symbols, and add a struct symtab to a symtab list. The syntax of
913 the command is rather bizarre--(1) buildargv implements various
914 quoting conventions which are undocumented and have little or
915 nothing in common with the way things are quoted (or not quoted)
916 elsewhere in GDB, (2) options are used, which are not generally
917 used in GDB (perhaps "set mapped on", "set readnow on" would be
918 better), (3) the order of options matters, which is contrary to GNU
919 conventions (because it is confusing and inconvenient). */
920 /* Note: ezannoni 2000-04-17. This function used to have support for
921 rombug (see remote-os9k.c). It consisted of a call to target_link()
922 (target.c) to get the address of the text segment from the target,
923 and pass that to symbol_file_add(). This is no longer supported. */
926 symbol_file_command (char *args
, int from_tty
)
930 struct cleanup
*cleanups
;
931 int flags
= OBJF_USERLOADED
;
937 if ((have_full_symbols () || have_partial_symbols ())
939 && !query ("Discard symbol table from `%s'? ",
940 symfile_objfile
->name
))
941 error ("Not confirmed.");
942 free_all_objfiles ();
944 /* solib descriptors may have handles to objfiles. Since their
945 storage has just been released, we'd better wipe the solib
948 #if defined(SOLIB_RESTART)
952 symfile_objfile
= NULL
;
954 printf_unfiltered ("No symbol file now.\n");
956 RESET_HP_UX_GLOBALS ();
961 if ((argv
= buildargv (args
)) == NULL
)
965 cleanups
= make_cleanup_freeargv (argv
);
966 while (*argv
!= NULL
)
968 if (STREQ (*argv
, "-mapped"))
969 flags
|= OBJF_MAPPED
;
971 if (STREQ (*argv
, "-readnow"))
972 flags
|= OBJF_READNOW
;
975 error ("unknown option `%s'", *argv
);
979 symbol_file_add (name
, from_tty
, NULL
, 1, flags
);
981 RESET_HP_UX_GLOBALS ();
983 /* Getting new symbols may change our opinion about
984 what is frameless. */
985 reinit_frame_cache ();
987 set_initial_language ();
994 error ("no symbol file name was specified");
996 TUIDO (((TuiOpaqueFuncPtr
) tuiDisplayMainFunction
));
997 do_cleanups (cleanups
);
1001 /* Set the initial language.
1003 A better solution would be to record the language in the psymtab when reading
1004 partial symbols, and then use it (if known) to set the language. This would
1005 be a win for formats that encode the language in an easily discoverable place,
1006 such as DWARF. For stabs, we can jump through hoops looking for specially
1007 named symbols or try to intuit the language from the specific type of stabs
1008 we find, but we can't do that until later when we read in full symbols.
1012 set_initial_language (void)
1014 struct partial_symtab
*pst
;
1015 enum language lang
= language_unknown
;
1017 pst
= find_main_psymtab ();
1020 if (pst
->filename
!= NULL
)
1022 lang
= deduce_language_from_filename (pst
->filename
);
1024 if (lang
== language_unknown
)
1026 /* Make C the default language */
1029 set_language (lang
);
1030 expected_language
= current_language
; /* Don't warn the user */
1034 /* Open file specified by NAME and hand it off to BFD for preliminary
1035 analysis. Result is a newly initialized bfd *, which includes a newly
1036 malloc'd` copy of NAME (tilde-expanded and made absolute).
1037 In case of trouble, error() is called. */
1040 symfile_bfd_open (char *name
)
1044 char *absolute_name
;
1048 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy */
1050 /* Look down path for it, allocate 2nd new malloc'd copy. */
1051 desc
= openp (getenv ("PATH"), 1, name
, O_RDONLY
| O_BINARY
, 0, &absolute_name
);
1052 #if defined(__GO32__) || defined(_WIN32)
1055 char *exename
= alloca (strlen (name
) + 5);
1056 strcat (strcpy (exename
, name
), ".exe");
1057 desc
= openp (getenv ("PATH"), 1, exename
, O_RDONLY
| O_BINARY
,
1063 make_cleanup (free
, name
);
1064 perror_with_name (name
);
1066 free (name
); /* Free 1st new malloc'd copy */
1067 name
= absolute_name
; /* Keep 2nd malloc'd copy in bfd */
1068 /* It'll be freed in free_objfile(). */
1070 sym_bfd
= bfd_fdopenr (name
, gnutarget
, desc
);
1074 make_cleanup (free
, name
);
1075 error ("\"%s\": can't open to read symbols: %s.", name
,
1076 bfd_errmsg (bfd_get_error ()));
1078 sym_bfd
->cacheable
= true;
1080 if (!bfd_check_format (sym_bfd
, bfd_object
))
1082 /* FIXME: should be checking for errors from bfd_close (for one thing,
1083 on error it does not free all the storage associated with the
1085 bfd_close (sym_bfd
); /* This also closes desc */
1086 make_cleanup (free
, name
);
1087 error ("\"%s\": can't read symbols: %s.", name
,
1088 bfd_errmsg (bfd_get_error ()));
1093 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1094 startup by the _initialize routine in each object file format reader,
1095 to register information about each format the the reader is prepared
1099 add_symtab_fns (struct sym_fns
*sf
)
1101 sf
->next
= symtab_fns
;
1106 /* Initialize to read symbols from the symbol file sym_bfd. It either
1107 returns or calls error(). The result is an initialized struct sym_fns
1108 in the objfile structure, that contains cached information about the
1112 find_sym_fns (struct objfile
*objfile
)
1115 enum bfd_flavour our_flavour
= bfd_get_flavour (objfile
->obfd
);
1116 char *our_target
= bfd_get_target (objfile
->obfd
);
1118 /* Special kludge for apollo. See dstread.c. */
1119 if (STREQN (our_target
, "apollo", 6))
1120 our_flavour
= (enum bfd_flavour
) -2;
1122 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
->next
)
1124 if (our_flavour
== sf
->sym_flavour
)
1130 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
1131 bfd_get_target (objfile
->obfd
));
1134 /* This function runs the load command of our current target. */
1137 load_command (char *arg
, int from_tty
)
1140 arg
= get_exec_file (1);
1141 target_load (arg
, from_tty
);
1144 /* This version of "load" should be usable for any target. Currently
1145 it is just used for remote targets, not inftarg.c or core files,
1146 on the theory that only in that case is it useful.
1148 Avoiding xmodem and the like seems like a win (a) because we don't have
1149 to worry about finding it, and (b) On VMS, fork() is very slow and so
1150 we don't want to run a subprocess. On the other hand, I'm not sure how
1151 performance compares. */
1153 static int download_write_size
= 512;
1154 static int validate_download
= 0;
1157 generic_load (char *args
, int from_tty
)
1161 time_t start_time
, end_time
; /* Start and end times of download */
1162 unsigned long data_count
= 0; /* Number of bytes transferred to memory */
1163 unsigned long write_count
= 0; /* Number of writes needed. */
1164 unsigned long load_offset
; /* offset to add to vma for each section */
1166 struct cleanup
*old_cleanups
;
1168 CORE_ADDR total_size
= 0;
1169 CORE_ADDR total_sent
= 0;
1171 /* Parse the input argument - the user can specify a load offset as
1172 a second argument. */
1173 filename
= xmalloc (strlen (args
) + 1);
1174 old_cleanups
= make_cleanup (free
, filename
);
1175 strcpy (filename
, args
);
1176 offptr
= strchr (filename
, ' ');
1180 load_offset
= strtoul (offptr
, &endptr
, 0);
1181 if (offptr
== endptr
)
1182 error ("Invalid download offset:%s\n", offptr
);
1188 /* Open the file for loading. */
1189 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
1190 if (loadfile_bfd
== NULL
)
1192 perror_with_name (filename
);
1196 /* FIXME: should be checking for errors from bfd_close (for one thing,
1197 on error it does not free all the storage associated with the
1199 make_cleanup_bfd_close (loadfile_bfd
);
1201 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
1203 error ("\"%s\" is not an object file: %s", filename
,
1204 bfd_errmsg (bfd_get_error ()));
1207 for (s
= loadfile_bfd
->sections
; s
; s
= s
->next
)
1208 if (s
->flags
& SEC_LOAD
)
1209 total_size
+= bfd_get_section_size_before_reloc (s
);
1211 start_time
= time (NULL
);
1213 for (s
= loadfile_bfd
->sections
; s
; s
= s
->next
)
1215 if (s
->flags
& SEC_LOAD
)
1217 CORE_ADDR size
= bfd_get_section_size_before_reloc (s
);
1221 struct cleanup
*old_chain
;
1222 CORE_ADDR lma
= s
->lma
+ load_offset
;
1223 CORE_ADDR block_size
;
1225 const char *sect_name
= bfd_get_section_name (loadfile_bfd
, s
);
1228 if (download_write_size
> 0 && size
> download_write_size
)
1229 block_size
= download_write_size
;
1233 buffer
= xmalloc (size
);
1234 old_chain
= make_cleanup (free
, buffer
);
1236 /* Is this really necessary? I guess it gives the user something
1237 to look at during a long download. */
1239 ui_out_message (uiout
, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1240 sect_name
, paddr_nz (size
), paddr_nz (lma
));
1242 fprintf_unfiltered (gdb_stdout
,
1243 "Loading section %s, size 0x%s lma 0x%s\n",
1244 sect_name
, paddr_nz (size
), paddr_nz (lma
));
1247 bfd_get_section_contents (loadfile_bfd
, s
, buffer
, 0, size
);
1253 CORE_ADDR this_transfer
= size
- sent
;
1254 if (this_transfer
>= block_size
)
1255 this_transfer
= block_size
;
1256 len
= target_write_memory_partial (lma
, buffer
,
1257 this_transfer
, &err
);
1260 if (validate_download
)
1262 /* Broken memories and broken monitors manifest
1263 themselves here when bring new computers to
1264 life. This doubles already slow downloads. */
1265 /* NOTE: cagney/1999-10-18: A more efficient
1266 implementation might add a verify_memory()
1267 method to the target vector and then use
1268 that. remote.c could implement that method
1269 using the ``qCRC'' packet. */
1270 char *check
= xmalloc (len
);
1271 struct cleanup
*verify_cleanups
= make_cleanup (free
, check
);
1272 if (target_read_memory (lma
, check
, len
) != 0)
1273 error ("Download verify read failed at 0x%s",
1275 if (memcmp (buffer
, check
, len
) != 0)
1276 error ("Download verify compare failed at 0x%s",
1278 do_cleanups (verify_cleanups
);
1287 || (ui_load_progress_hook
!= NULL
1288 && ui_load_progress_hook (sect_name
, sent
)))
1289 error ("Canceled the download");
1291 if (show_load_progress
!= NULL
)
1292 show_load_progress (sect_name
, sent
, size
, total_sent
, total_size
);
1294 while (sent
< size
);
1297 error ("Memory access error while loading section %s.", sect_name
);
1299 do_cleanups (old_chain
);
1304 end_time
= time (NULL
);
1307 entry
= bfd_get_start_address (loadfile_bfd
);
1309 ui_out_text (uiout
, "Start address ");
1310 ui_out_field_fmt (uiout
, "address", "0x%s" , paddr_nz (entry
));
1311 ui_out_text (uiout
, ", load size ");
1312 ui_out_field_fmt (uiout
, "load-size", "%ld" , data_count
);
1313 ui_out_text (uiout
, "\n");
1316 fprintf_unfiltered (gdb_stdout
,
1317 "Start address 0x%s , load size %ld\n",
1318 paddr_nz (entry
), data_count
);
1320 /* We were doing this in remote-mips.c, I suspect it is right
1321 for other targets too. */
1325 /* FIXME: are we supposed to call symbol_file_add or not? According to
1326 a comment from remote-mips.c (where a call to symbol_file_add was
1327 commented out), making the call confuses GDB if more than one file is
1328 loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c
1331 print_transfer_performance (gdb_stdout
, data_count
, write_count
,
1332 end_time
- start_time
);
1334 do_cleanups (old_cleanups
);
1337 /* Report how fast the transfer went. */
1339 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1340 replaced by print_transfer_performance (with a very different
1341 function signature). */
1344 report_transfer_performance (unsigned long data_count
, time_t start_time
,
1347 print_transfer_performance (gdb_stdout
, data_count
, end_time
- start_time
, 0);
1351 print_transfer_performance (struct ui_file
*stream
,
1352 unsigned long data_count
,
1353 unsigned long write_count
,
1354 unsigned long time_count
)
1357 ui_out_text (uiout
, "Transfer rate: ");
1360 ui_out_field_fmt (uiout
, "transfer-rate", "%ld",
1361 (data_count
* 8) / time_count
);
1362 ui_out_text (uiout
, " bits/sec");
1366 ui_out_field_fmt (uiout
, "transferred-bits", "%ld", (data_count
* 8));
1367 ui_out_text (uiout
, " bits in <1 sec");
1369 if (write_count
> 0)
1371 ui_out_text (uiout
, ", ");
1372 ui_out_field_fmt (uiout
, "write-rate", "%ld", data_count
/ write_count
);
1373 ui_out_text (uiout
, " bytes/write");
1375 ui_out_text (uiout
, ".\n");
1377 fprintf_unfiltered (stream
, "Transfer rate: ");
1379 fprintf_unfiltered (stream
, "%ld bits/sec", (data_count
* 8) / time_count
);
1381 fprintf_unfiltered (stream
, "%ld bits in <1 sec", (data_count
* 8));
1382 if (write_count
> 0)
1383 fprintf_unfiltered (stream
, ", %ld bytes/write", data_count
/ write_count
);
1384 fprintf_unfiltered (stream
, ".\n");
1388 /* This function allows the addition of incrementally linked object files.
1389 It does not modify any state in the target, only in the debugger. */
1390 /* Note: ezannoni 2000-04-13 This function/command used to have a
1391 special case syntax for the rombug target (Rombug is the boot
1392 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
1393 rombug case, the user doesn't need to supply a text address,
1394 instead a call to target_link() (in target.c) would supply the
1395 value to use. We are now discontinuing this type of ad hoc syntax. */
1399 add_symbol_file_command (char *args
, int from_tty
)
1401 char *filename
= NULL
;
1402 int flags
= OBJF_USERLOADED
;
1404 int expecting_option
= 0;
1405 int section_index
= 0;
1409 int expecting_sec_name
= 0;
1410 int expecting_sec_addr
= 0;
1416 } sect_opts
[SECT_OFF_MAX
];
1418 struct section_addr_info section_addrs
;
1419 struct cleanup
*my_cleanups
;
1424 error ("add-symbol-file takes a file name and an address");
1426 /* Make a copy of the string that we can safely write into. */
1427 args
= xstrdup (args
);
1429 /* Ensure section_addrs is initialized */
1430 memset (§ion_addrs
, 0, sizeof (section_addrs
));
1432 while (*args
!= '\000')
1434 /* Any leading spaces? */
1435 while (isspace (*args
))
1438 /* Point arg to the beginning of the argument. */
1441 /* Move args pointer over the argument. */
1442 while ((*args
!= '\000') && !isspace (*args
))
1445 /* If there are more arguments, terminate arg and
1447 if (*args
!= '\000')
1450 /* Now process the argument. */
1453 /* The first argument is the file name. */
1454 filename
= tilde_expand (arg
);
1455 my_cleanups
= make_cleanup (free
, filename
);
1460 /* The second argument is always the text address at which
1461 to load the program. */
1462 sect_opts
[section_index
].name
= ".text";
1463 sect_opts
[section_index
].value
= arg
;
1468 /* It's an option (starting with '-') or it's an argument
1473 if (strcmp (arg
, "-mapped") == 0)
1474 flags
|= OBJF_MAPPED
;
1476 if (strcmp (arg
, "-readnow") == 0)
1477 flags
|= OBJF_READNOW
;
1479 if (strcmp (arg
, "-s") == 0)
1481 if (section_index
>= SECT_OFF_MAX
)
1482 error ("Too many sections specified.");
1483 expecting_sec_name
= 1;
1484 expecting_sec_addr
= 1;
1489 if (expecting_sec_name
)
1491 sect_opts
[section_index
].name
= arg
;
1492 expecting_sec_name
= 0;
1495 if (expecting_sec_addr
)
1497 sect_opts
[section_index
].value
= arg
;
1498 expecting_sec_addr
= 0;
1502 error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*");
1508 /* Print the prompt for the query below. And save the arguments into
1509 a sect_addr_info structure to be passed around to other
1510 functions. We have to split this up into separate print
1511 statements because local_hex_string returns a local static
1514 printf_filtered ("add symbol table from file \"%s\" at\n", filename
);
1515 for (i
= 0; i
< section_index
; i
++)
1518 char *val
= sect_opts
[i
].value
;
1519 char *sec
= sect_opts
[i
].name
;
1521 val
= sect_opts
[i
].value
;
1522 if (val
[0] == '0' && val
[1] == 'x')
1523 addr
= strtoul (val
+2, NULL
, 16);
1525 addr
= strtoul (val
, NULL
, 10);
1527 /* Here we store the section offsets in the order they were
1528 entered on the command line. */
1529 section_addrs
.other
[sec_num
].name
= sec
;
1530 section_addrs
.other
[sec_num
].addr
= addr
;
1531 printf_filtered ("\t%s_addr = %s\n",
1533 local_hex_string ((unsigned long)addr
));
1536 /* The object's sections are initialized when a
1537 call is made to build_objfile_section_table (objfile).
1538 This happens in reread_symbols.
1539 At this point, we don't know what file type this is,
1540 so we can't determine what section names are valid. */
1543 if (from_tty
&& (!query ("%s", "")))
1544 error ("Not confirmed.");
1546 symbol_file_add (filename
, from_tty
, §ion_addrs
, 0, flags
);
1548 /* Getting new symbols may change our opinion about what is
1550 reinit_frame_cache ();
1551 do_cleanups (my_cleanups
);
1555 add_shared_symbol_files_command (char *args
, int from_tty
)
1557 #ifdef ADD_SHARED_SYMBOL_FILES
1558 ADD_SHARED_SYMBOL_FILES (args
, from_tty
);
1560 error ("This command is not available in this configuration of GDB.");
1564 /* Re-read symbols if a symbol-file has changed. */
1566 reread_symbols (void)
1568 struct objfile
*objfile
;
1571 struct stat new_statbuf
;
1574 /* With the addition of shared libraries, this should be modified,
1575 the load time should be saved in the partial symbol tables, since
1576 different tables may come from different source files. FIXME.
1577 This routine should then walk down each partial symbol table
1578 and see if the symbol table that it originates from has been changed */
1580 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
1584 #ifdef IBM6000_TARGET
1585 /* If this object is from a shared library, then you should
1586 stat on the library name, not member name. */
1588 if (objfile
->obfd
->my_archive
)
1589 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
1592 res
= stat (objfile
->name
, &new_statbuf
);
1595 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1596 printf_filtered ("`%s' has disappeared; keeping its symbols.\n",
1600 new_modtime
= new_statbuf
.st_mtime
;
1601 if (new_modtime
!= objfile
->mtime
)
1603 struct cleanup
*old_cleanups
;
1604 struct section_offsets
*offsets
;
1606 char *obfd_filename
;
1608 printf_filtered ("`%s' has changed; re-reading symbols.\n",
1611 /* There are various functions like symbol_file_add,
1612 symfile_bfd_open, syms_from_objfile, etc., which might
1613 appear to do what we want. But they have various other
1614 effects which we *don't* want. So we just do stuff
1615 ourselves. We don't worry about mapped files (for one thing,
1616 any mapped file will be out of date). */
1618 /* If we get an error, blow away this objfile (not sure if
1619 that is the correct response for things like shared
1621 old_cleanups
= make_cleanup_free_objfile (objfile
);
1622 /* We need to do this whenever any symbols go away. */
1623 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
1625 /* Clean up any state BFD has sitting around. We don't need
1626 to close the descriptor but BFD lacks a way of closing the
1627 BFD without closing the descriptor. */
1628 obfd_filename
= bfd_get_filename (objfile
->obfd
);
1629 if (!bfd_close (objfile
->obfd
))
1630 error ("Can't close BFD for %s: %s", objfile
->name
,
1631 bfd_errmsg (bfd_get_error ()));
1632 objfile
->obfd
= bfd_openr (obfd_filename
, gnutarget
);
1633 if (objfile
->obfd
== NULL
)
1634 error ("Can't open %s to read symbols.", objfile
->name
);
1635 /* bfd_openr sets cacheable to true, which is what we want. */
1636 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
1637 error ("Can't read symbols from %s: %s.", objfile
->name
,
1638 bfd_errmsg (bfd_get_error ()));
1640 /* Save the offsets, we will nuke them with the rest of the
1642 num_offsets
= objfile
->num_sections
;
1643 offsets
= (struct section_offsets
*) alloca (SIZEOF_SECTION_OFFSETS
);
1644 memcpy (offsets
, objfile
->section_offsets
, SIZEOF_SECTION_OFFSETS
);
1646 /* Nuke all the state that we will re-read. Much of the following
1647 code which sets things to NULL really is necessary to tell
1648 other parts of GDB that there is nothing currently there. */
1650 /* FIXME: Do we have to free a whole linked list, or is this
1652 if (objfile
->global_psymbols
.list
)
1653 mfree (objfile
->md
, objfile
->global_psymbols
.list
);
1654 memset (&objfile
->global_psymbols
, 0,
1655 sizeof (objfile
->global_psymbols
));
1656 if (objfile
->static_psymbols
.list
)
1657 mfree (objfile
->md
, objfile
->static_psymbols
.list
);
1658 memset (&objfile
->static_psymbols
, 0,
1659 sizeof (objfile
->static_psymbols
));
1661 /* Free the obstacks for non-reusable objfiles */
1662 free_bcache (&objfile
->psymbol_cache
);
1663 obstack_free (&objfile
->psymbol_obstack
, 0);
1664 obstack_free (&objfile
->symbol_obstack
, 0);
1665 obstack_free (&objfile
->type_obstack
, 0);
1666 objfile
->sections
= NULL
;
1667 objfile
->symtabs
= NULL
;
1668 objfile
->psymtabs
= NULL
;
1669 objfile
->free_psymtabs
= NULL
;
1670 objfile
->msymbols
= NULL
;
1671 objfile
->minimal_symbol_count
= 0;
1672 memset (&objfile
->msymbol_hash
, 0,
1673 sizeof (objfile
->msymbol_hash
));
1674 memset (&objfile
->msymbol_demangled_hash
, 0,
1675 sizeof (objfile
->msymbol_demangled_hash
));
1676 objfile
->fundamental_types
= NULL
;
1677 if (objfile
->sf
!= NULL
)
1679 (*objfile
->sf
->sym_finish
) (objfile
);
1682 /* We never make this a mapped file. */
1684 /* obstack_specify_allocation also initializes the obstack so
1686 obstack_specify_allocation (&objfile
->psymbol_cache
.cache
, 0, 0,
1688 obstack_specify_allocation (&objfile
->psymbol_obstack
, 0, 0,
1690 obstack_specify_allocation (&objfile
->symbol_obstack
, 0, 0,
1692 obstack_specify_allocation (&objfile
->type_obstack
, 0, 0,
1694 if (build_objfile_section_table (objfile
))
1696 error ("Can't find the file sections in `%s': %s",
1697 objfile
->name
, bfd_errmsg (bfd_get_error ()));
1700 /* We use the same section offsets as from last time. I'm not
1701 sure whether that is always correct for shared libraries. */
1702 objfile
->section_offsets
= (struct section_offsets
*)
1703 obstack_alloc (&objfile
->psymbol_obstack
, SIZEOF_SECTION_OFFSETS
);
1704 memcpy (objfile
->section_offsets
, offsets
, SIZEOF_SECTION_OFFSETS
);
1705 objfile
->num_sections
= num_offsets
;
1707 /* What the hell is sym_new_init for, anyway? The concept of
1708 distinguishing between the main file and additional files
1709 in this way seems rather dubious. */
1710 if (objfile
== symfile_objfile
)
1712 (*objfile
->sf
->sym_new_init
) (objfile
);
1714 RESET_HP_UX_GLOBALS ();
1718 (*objfile
->sf
->sym_init
) (objfile
);
1719 clear_complaints (1, 1);
1720 /* The "mainline" parameter is a hideous hack; I think leaving it
1721 zero is OK since dbxread.c also does what it needs to do if
1722 objfile->global_psymbols.size is 0. */
1723 (*objfile
->sf
->sym_read
) (objfile
, 0);
1724 if (!have_partial_symbols () && !have_full_symbols ())
1727 printf_filtered ("(no debugging symbols found)\n");
1730 objfile
->flags
|= OBJF_SYMS
;
1732 /* We're done reading the symbol file; finish off complaints. */
1733 clear_complaints (0, 1);
1735 /* Getting new symbols may change our opinion about what is
1738 reinit_frame_cache ();
1740 /* Discard cleanups as symbol reading was successful. */
1741 discard_cleanups (old_cleanups
);
1743 /* If the mtime has changed between the time we set new_modtime
1744 and now, we *want* this to be out of date, so don't call stat
1746 objfile
->mtime
= new_modtime
;
1749 /* Call this after reading in a new symbol table to give target
1750 dependent code a crack at the new symbols. For instance, this
1751 could be used to update the values of target-specific symbols GDB
1752 needs to keep track of (such as _sigtramp, or whatever). */
1754 TARGET_SYMFILE_POSTREAD (objfile
);
1760 clear_symtab_users ();
1772 static filename_language
*filename_language_table
;
1773 static int fl_table_size
, fl_table_next
;
1776 add_filename_language (char *ext
, enum language lang
)
1778 if (fl_table_next
>= fl_table_size
)
1780 fl_table_size
+= 10;
1781 filename_language_table
= realloc (filename_language_table
,
1785 filename_language_table
[fl_table_next
].ext
= strsave (ext
);
1786 filename_language_table
[fl_table_next
].lang
= lang
;
1790 static char *ext_args
;
1793 set_ext_lang_command (char *args
, int from_tty
)
1796 char *cp
= ext_args
;
1799 /* First arg is filename extension, starting with '.' */
1801 error ("'%s': Filename extension must begin with '.'", ext_args
);
1803 /* Find end of first arg. */
1804 while (*cp
&& !isspace (*cp
))
1808 error ("'%s': two arguments required -- filename extension and language",
1811 /* Null-terminate first arg */
1814 /* Find beginning of second arg, which should be a source language. */
1815 while (*cp
&& isspace (*cp
))
1819 error ("'%s': two arguments required -- filename extension and language",
1822 /* Lookup the language from among those we know. */
1823 lang
= language_enum (cp
);
1825 /* Now lookup the filename extension: do we already know it? */
1826 for (i
= 0; i
< fl_table_next
; i
++)
1827 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
1830 if (i
>= fl_table_next
)
1832 /* new file extension */
1833 add_filename_language (ext_args
, lang
);
1837 /* redefining a previously known filename extension */
1840 /* query ("Really make files of type %s '%s'?", */
1841 /* ext_args, language_str (lang)); */
1843 free (filename_language_table
[i
].ext
);
1844 filename_language_table
[i
].ext
= strsave (ext_args
);
1845 filename_language_table
[i
].lang
= lang
;
1850 info_ext_lang_command (char *args
, int from_tty
)
1854 printf_filtered ("Filename extensions and the languages they represent:");
1855 printf_filtered ("\n\n");
1856 for (i
= 0; i
< fl_table_next
; i
++)
1857 printf_filtered ("\t%s\t- %s\n",
1858 filename_language_table
[i
].ext
,
1859 language_str (filename_language_table
[i
].lang
));
1863 init_filename_language_table (void)
1865 if (fl_table_size
== 0) /* protect against repetition */
1869 filename_language_table
=
1870 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
1871 add_filename_language (".c", language_c
);
1872 add_filename_language (".C", language_cplus
);
1873 add_filename_language (".cc", language_cplus
);
1874 add_filename_language (".cp", language_cplus
);
1875 add_filename_language (".cpp", language_cplus
);
1876 add_filename_language (".cxx", language_cplus
);
1877 add_filename_language (".c++", language_cplus
);
1878 add_filename_language (".java", language_java
);
1879 add_filename_language (".class", language_java
);
1880 add_filename_language (".ch", language_chill
);
1881 add_filename_language (".c186", language_chill
);
1882 add_filename_language (".c286", language_chill
);
1883 add_filename_language (".f", language_fortran
);
1884 add_filename_language (".F", language_fortran
);
1885 add_filename_language (".s", language_asm
);
1886 add_filename_language (".S", language_asm
);
1887 add_filename_language (".pas", language_pascal
);
1888 add_filename_language (".p", language_pascal
);
1889 add_filename_language (".pp", language_pascal
);
1894 deduce_language_from_filename (char *filename
)
1899 if (filename
!= NULL
)
1900 if ((cp
= strrchr (filename
, '.')) != NULL
)
1901 for (i
= 0; i
< fl_table_next
; i
++)
1902 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
1903 return filename_language_table
[i
].lang
;
1905 return language_unknown
;
1910 Allocate and partly initialize a new symbol table. Return a pointer
1911 to it. error() if no space.
1913 Caller must set these fields:
1919 possibly free_named_symtabs (symtab->filename);
1923 allocate_symtab (char *filename
, struct objfile
*objfile
)
1925 register struct symtab
*symtab
;
1927 symtab
= (struct symtab
*)
1928 obstack_alloc (&objfile
->symbol_obstack
, sizeof (struct symtab
));
1929 memset (symtab
, 0, sizeof (*symtab
));
1930 symtab
->filename
= obsavestring (filename
, strlen (filename
),
1931 &objfile
->symbol_obstack
);
1932 symtab
->fullname
= NULL
;
1933 symtab
->language
= deduce_language_from_filename (filename
);
1934 symtab
->debugformat
= obsavestring ("unknown", 7,
1935 &objfile
->symbol_obstack
);
1937 /* Hook it to the objfile it comes from */
1939 symtab
->objfile
= objfile
;
1940 symtab
->next
= objfile
->symtabs
;
1941 objfile
->symtabs
= symtab
;
1943 /* FIXME: This should go away. It is only defined for the Z8000,
1944 and the Z8000 definition of this macro doesn't have anything to
1945 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
1946 here for convenience. */
1947 #ifdef INIT_EXTRA_SYMTAB_INFO
1948 INIT_EXTRA_SYMTAB_INFO (symtab
);
1954 struct partial_symtab
*
1955 allocate_psymtab (char *filename
, struct objfile
*objfile
)
1957 struct partial_symtab
*psymtab
;
1959 if (objfile
->free_psymtabs
)
1961 psymtab
= objfile
->free_psymtabs
;
1962 objfile
->free_psymtabs
= psymtab
->next
;
1965 psymtab
= (struct partial_symtab
*)
1966 obstack_alloc (&objfile
->psymbol_obstack
,
1967 sizeof (struct partial_symtab
));
1969 memset (psymtab
, 0, sizeof (struct partial_symtab
));
1970 psymtab
->filename
= obsavestring (filename
, strlen (filename
),
1971 &objfile
->psymbol_obstack
);
1972 psymtab
->symtab
= NULL
;
1974 /* Prepend it to the psymtab list for the objfile it belongs to.
1975 Psymtabs are searched in most recent inserted -> least recent
1978 psymtab
->objfile
= objfile
;
1979 psymtab
->next
= objfile
->psymtabs
;
1980 objfile
->psymtabs
= psymtab
;
1983 struct partial_symtab
**prev_pst
;
1984 psymtab
->objfile
= objfile
;
1985 psymtab
->next
= NULL
;
1986 prev_pst
= &(objfile
->psymtabs
);
1987 while ((*prev_pst
) != NULL
)
1988 prev_pst
= &((*prev_pst
)->next
);
1989 (*prev_pst
) = psymtab
;
1997 discard_psymtab (struct partial_symtab
*pst
)
1999 struct partial_symtab
**prev_pst
;
2002 Empty psymtabs happen as a result of header files which don't
2003 have any symbols in them. There can be a lot of them. But this
2004 check is wrong, in that a psymtab with N_SLINE entries but
2005 nothing else is not empty, but we don't realize that. Fixing
2006 that without slowing things down might be tricky. */
2008 /* First, snip it out of the psymtab chain */
2010 prev_pst
= &(pst
->objfile
->psymtabs
);
2011 while ((*prev_pst
) != pst
)
2012 prev_pst
= &((*prev_pst
)->next
);
2013 (*prev_pst
) = pst
->next
;
2015 /* Next, put it on a free list for recycling */
2017 pst
->next
= pst
->objfile
->free_psymtabs
;
2018 pst
->objfile
->free_psymtabs
= pst
;
2022 /* Reset all data structures in gdb which may contain references to symbol
2026 clear_symtab_users (void)
2028 /* Someday, we should do better than this, by only blowing away
2029 the things that really need to be blown. */
2030 clear_value_history ();
2032 clear_internalvars ();
2033 breakpoint_re_set ();
2034 set_default_breakpoint (0, 0, 0, 0);
2035 current_source_symtab
= 0;
2036 current_source_line
= 0;
2037 clear_pc_function_cache ();
2038 if (target_new_objfile_hook
)
2039 target_new_objfile_hook (NULL
);
2043 clear_symtab_users_cleanup (void *ignore
)
2045 clear_symtab_users ();
2048 /* clear_symtab_users_once:
2050 This function is run after symbol reading, or from a cleanup.
2051 If an old symbol table was obsoleted, the old symbol table
2052 has been blown away, but the other GDB data structures that may
2053 reference it have not yet been cleared or re-directed. (The old
2054 symtab was zapped, and the cleanup queued, in free_named_symtab()
2057 This function can be queued N times as a cleanup, or called
2058 directly; it will do all the work the first time, and then will be a
2059 no-op until the next time it is queued. This works by bumping a
2060 counter at queueing time. Much later when the cleanup is run, or at
2061 the end of symbol processing (in case the cleanup is discarded), if
2062 the queued count is greater than the "done-count", we do the work
2063 and set the done-count to the queued count. If the queued count is
2064 less than or equal to the done-count, we just ignore the call. This
2065 is needed because reading a single .o file will often replace many
2066 symtabs (one per .h file, for example), and we don't want to reset
2067 the breakpoints N times in the user's face.
2069 The reason we both queue a cleanup, and call it directly after symbol
2070 reading, is because the cleanup protects us in case of errors, but is
2071 discarded if symbol reading is successful. */
2074 /* FIXME: As free_named_symtabs is currently a big noop this function
2075 is no longer needed. */
2076 static void clear_symtab_users_once (void);
2078 static int clear_symtab_users_queued
;
2079 static int clear_symtab_users_done
;
2082 clear_symtab_users_once (void)
2084 /* Enforce once-per-`do_cleanups'-semantics */
2085 if (clear_symtab_users_queued
<= clear_symtab_users_done
)
2087 clear_symtab_users_done
= clear_symtab_users_queued
;
2089 clear_symtab_users ();
2093 /* Delete the specified psymtab, and any others that reference it. */
2096 cashier_psymtab (struct partial_symtab
*pst
)
2098 struct partial_symtab
*ps
, *pprev
= NULL
;
2101 /* Find its previous psymtab in the chain */
2102 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2111 /* Unhook it from the chain. */
2112 if (ps
== pst
->objfile
->psymtabs
)
2113 pst
->objfile
->psymtabs
= ps
->next
;
2115 pprev
->next
= ps
->next
;
2117 /* FIXME, we can't conveniently deallocate the entries in the
2118 partial_symbol lists (global_psymbols/static_psymbols) that
2119 this psymtab points to. These just take up space until all
2120 the psymtabs are reclaimed. Ditto the dependencies list and
2121 filename, which are all in the psymbol_obstack. */
2123 /* We need to cashier any psymtab that has this one as a dependency... */
2125 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2127 for (i
= 0; i
< ps
->number_of_dependencies
; i
++)
2129 if (ps
->dependencies
[i
] == pst
)
2131 cashier_psymtab (ps
);
2132 goto again
; /* Must restart, chain has been munged. */
2139 /* If a symtab or psymtab for filename NAME is found, free it along
2140 with any dependent breakpoints, displays, etc.
2141 Used when loading new versions of object modules with the "add-file"
2142 command. This is only called on the top-level symtab or psymtab's name;
2143 it is not called for subsidiary files such as .h files.
2145 Return value is 1 if we blew away the environment, 0 if not.
2146 FIXME. The return value appears to never be used.
2148 FIXME. I think this is not the best way to do this. We should
2149 work on being gentler to the environment while still cleaning up
2150 all stray pointers into the freed symtab. */
2153 free_named_symtabs (char *name
)
2156 /* FIXME: With the new method of each objfile having it's own
2157 psymtab list, this function needs serious rethinking. In particular,
2158 why was it ever necessary to toss psymtabs with specific compilation
2159 unit filenames, as opposed to all psymtabs from a particular symbol
2161 Well, the answer is that some systems permit reloading of particular
2162 compilation units. We want to blow away any old info about these
2163 compilation units, regardless of which objfiles they arrived in. --gnu. */
2165 register struct symtab
*s
;
2166 register struct symtab
*prev
;
2167 register struct partial_symtab
*ps
;
2168 struct blockvector
*bv
;
2171 /* We only wack things if the symbol-reload switch is set. */
2172 if (!symbol_reloading
)
2175 /* Some symbol formats have trouble providing file names... */
2176 if (name
== 0 || *name
== '\0')
2179 /* Look for a psymtab with the specified name. */
2182 for (ps
= partial_symtab_list
; ps
; ps
= ps
->next
)
2184 if (STREQ (name
, ps
->filename
))
2186 cashier_psymtab (ps
); /* Blow it away...and its little dog, too. */
2187 goto again2
; /* Must restart, chain has been munged */
2191 /* Look for a symtab with the specified name. */
2193 for (s
= symtab_list
; s
; s
= s
->next
)
2195 if (STREQ (name
, s
->filename
))
2202 if (s
== symtab_list
)
2203 symtab_list
= s
->next
;
2205 prev
->next
= s
->next
;
2207 /* For now, queue a delete for all breakpoints, displays, etc., whether
2208 or not they depend on the symtab being freed. This should be
2209 changed so that only those data structures affected are deleted. */
2211 /* But don't delete anything if the symtab is empty.
2212 This test is necessary due to a bug in "dbxread.c" that
2213 causes empty symtabs to be created for N_SO symbols that
2214 contain the pathname of the object file. (This problem
2215 has been fixed in GDB 3.9x). */
2217 bv
= BLOCKVECTOR (s
);
2218 if (BLOCKVECTOR_NBLOCKS (bv
) > 2
2219 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
))
2220 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)))
2222 complain (&oldsyms_complaint
, name
);
2224 clear_symtab_users_queued
++;
2225 make_cleanup (clear_symtab_users_once
, 0);
2230 complain (&empty_symtab_complaint
, name
);
2237 /* It is still possible that some breakpoints will be affected
2238 even though no symtab was found, since the file might have
2239 been compiled without debugging, and hence not be associated
2240 with a symtab. In order to handle this correctly, we would need
2241 to keep a list of text address ranges for undebuggable files.
2242 For now, we do nothing, since this is a fairly obscure case. */
2246 /* FIXME, what about the minimal symbol table? */
2253 /* Allocate and partially fill a partial symtab. It will be
2254 completely filled at the end of the symbol list.
2256 FILENAME is the name of the symbol-file we are reading from. */
2258 struct partial_symtab
*
2259 start_psymtab_common (struct objfile
*objfile
,
2260 struct section_offsets
*section_offsets
, char *filename
,
2261 CORE_ADDR textlow
, struct partial_symbol
**global_syms
,
2262 struct partial_symbol
**static_syms
)
2264 struct partial_symtab
*psymtab
;
2266 psymtab
= allocate_psymtab (filename
, objfile
);
2267 psymtab
->section_offsets
= section_offsets
;
2268 psymtab
->textlow
= textlow
;
2269 psymtab
->texthigh
= psymtab
->textlow
; /* default */
2270 psymtab
->globals_offset
= global_syms
- objfile
->global_psymbols
.list
;
2271 psymtab
->statics_offset
= static_syms
- objfile
->static_psymbols
.list
;
2275 /* Add a symbol with a long value to a psymtab.
2276 Since one arg is a struct, we pass in a ptr and deref it (sigh). */
2279 add_psymbol_to_list (char *name
, int namelength
, namespace_enum
namespace,
2280 enum address_class
class,
2281 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2282 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2283 enum language language
, struct objfile
*objfile
)
2285 register struct partial_symbol
*psym
;
2286 char *buf
= alloca (namelength
+ 1);
2287 /* psymbol is static so that there will be no uninitialized gaps in the
2288 structure which might contain random data, causing cache misses in
2290 static struct partial_symbol psymbol
;
2292 /* Create local copy of the partial symbol */
2293 memcpy (buf
, name
, namelength
);
2294 buf
[namelength
] = '\0';
2295 SYMBOL_NAME (&psymbol
) = bcache (buf
, namelength
+ 1, &objfile
->psymbol_cache
);
2296 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2299 SYMBOL_VALUE (&psymbol
) = val
;
2303 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2305 SYMBOL_SECTION (&psymbol
) = 0;
2306 SYMBOL_LANGUAGE (&psymbol
) = language
;
2307 PSYMBOL_NAMESPACE (&psymbol
) = namespace;
2308 PSYMBOL_CLASS (&psymbol
) = class;
2309 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2311 /* Stash the partial symbol away in the cache */
2312 psym
= bcache (&psymbol
, sizeof (struct partial_symbol
), &objfile
->psymbol_cache
);
2314 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2315 if (list
->next
>= list
->list
+ list
->size
)
2317 extend_psymbol_list (list
, objfile
);
2319 *list
->next
++ = psym
;
2320 OBJSTAT (objfile
, n_psyms
++);
2323 /* Add a symbol with a long value to a psymtab. This differs from
2324 * add_psymbol_to_list above in taking both a mangled and a demangled
2328 add_psymbol_with_dem_name_to_list (char *name
, int namelength
, char *dem_name
,
2329 int dem_namelength
, namespace_enum
namespace,
2330 enum address_class
class,
2331 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2332 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2333 enum language language
,
2334 struct objfile
*objfile
)
2336 register struct partial_symbol
*psym
;
2337 char *buf
= alloca (namelength
+ 1);
2338 /* psymbol is static so that there will be no uninitialized gaps in the
2339 structure which might contain random data, causing cache misses in
2341 static struct partial_symbol psymbol
;
2343 /* Create local copy of the partial symbol */
2345 memcpy (buf
, name
, namelength
);
2346 buf
[namelength
] = '\0';
2347 SYMBOL_NAME (&psymbol
) = bcache (buf
, namelength
+ 1, &objfile
->psymbol_cache
);
2349 buf
= alloca (dem_namelength
+ 1);
2350 memcpy (buf
, dem_name
, dem_namelength
);
2351 buf
[dem_namelength
] = '\0';
2356 case language_cplus
:
2357 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol
) =
2358 bcache (buf
, dem_namelength
+ 1, &objfile
->psymbol_cache
);
2360 case language_chill
:
2361 SYMBOL_CHILL_DEMANGLED_NAME (&psymbol
) =
2362 bcache (buf
, dem_namelength
+ 1, &objfile
->psymbol_cache
);
2364 /* FIXME What should be done for the default case? Ignoring for now. */
2367 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2370 SYMBOL_VALUE (&psymbol
) = val
;
2374 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2376 SYMBOL_SECTION (&psymbol
) = 0;
2377 SYMBOL_LANGUAGE (&psymbol
) = language
;
2378 PSYMBOL_NAMESPACE (&psymbol
) = namespace;
2379 PSYMBOL_CLASS (&psymbol
) = class;
2380 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2382 /* Stash the partial symbol away in the cache */
2383 psym
= bcache (&psymbol
, sizeof (struct partial_symbol
), &objfile
->psymbol_cache
);
2385 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2386 if (list
->next
>= list
->list
+ list
->size
)
2388 extend_psymbol_list (list
, objfile
);
2390 *list
->next
++ = psym
;
2391 OBJSTAT (objfile
, n_psyms
++);
2394 /* Initialize storage for partial symbols. */
2397 init_psymbol_list (struct objfile
*objfile
, int total_symbols
)
2399 /* Free any previously allocated psymbol lists. */
2401 if (objfile
->global_psymbols
.list
)
2403 mfree (objfile
->md
, (PTR
) objfile
->global_psymbols
.list
);
2405 if (objfile
->static_psymbols
.list
)
2407 mfree (objfile
->md
, (PTR
) objfile
->static_psymbols
.list
);
2410 /* Current best guess is that approximately a twentieth
2411 of the total symbols (in a debugging file) are global or static
2414 objfile
->global_psymbols
.size
= total_symbols
/ 10;
2415 objfile
->static_psymbols
.size
= total_symbols
/ 10;
2417 if (objfile
->global_psymbols
.size
> 0)
2419 objfile
->global_psymbols
.next
=
2420 objfile
->global_psymbols
.list
= (struct partial_symbol
**)
2421 xmmalloc (objfile
->md
, (objfile
->global_psymbols
.size
2422 * sizeof (struct partial_symbol
*)));
2424 if (objfile
->static_psymbols
.size
> 0)
2426 objfile
->static_psymbols
.next
=
2427 objfile
->static_psymbols
.list
= (struct partial_symbol
**)
2428 xmmalloc (objfile
->md
, (objfile
->static_psymbols
.size
2429 * sizeof (struct partial_symbol
*)));
2434 The following code implements an abstraction for debugging overlay sections.
2436 The target model is as follows:
2437 1) The gnu linker will permit multiple sections to be mapped into the
2438 same VMA, each with its own unique LMA (or load address).
2439 2) It is assumed that some runtime mechanism exists for mapping the
2440 sections, one by one, from the load address into the VMA address.
2441 3) This code provides a mechanism for gdb to keep track of which
2442 sections should be considered to be mapped from the VMA to the LMA.
2443 This information is used for symbol lookup, and memory read/write.
2444 For instance, if a section has been mapped then its contents
2445 should be read from the VMA, otherwise from the LMA.
2447 Two levels of debugger support for overlays are available. One is
2448 "manual", in which the debugger relies on the user to tell it which
2449 overlays are currently mapped. This level of support is
2450 implemented entirely in the core debugger, and the information about
2451 whether a section is mapped is kept in the objfile->obj_section table.
2453 The second level of support is "automatic", and is only available if
2454 the target-specific code provides functionality to read the target's
2455 overlay mapping table, and translate its contents for the debugger
2456 (by updating the mapped state information in the obj_section tables).
2458 The interface is as follows:
2460 overlay map <name> -- tell gdb to consider this section mapped
2461 overlay unmap <name> -- tell gdb to consider this section unmapped
2462 overlay list -- list the sections that GDB thinks are mapped
2463 overlay read-target -- get the target's state of what's mapped
2464 overlay off/manual/auto -- set overlay debugging state
2465 Functional interface:
2466 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2467 section, return that section.
2468 find_pc_overlay(pc): find any overlay section that contains
2469 the pc, either in its VMA or its LMA
2470 overlay_is_mapped(sect): true if overlay is marked as mapped
2471 section_is_overlay(sect): true if section's VMA != LMA
2472 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2473 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2474 overlay_mapped_address(...): map an address from section's LMA to VMA
2475 overlay_unmapped_address(...): map an address from section's VMA to LMA
2476 symbol_overlayed_address(...): Return a "current" address for symbol:
2477 either in VMA or LMA depending on whether
2478 the symbol's section is currently mapped
2481 /* Overlay debugging state: */
2483 int overlay_debugging
= 0; /* 0 == off, 1 == manual, -1 == auto */
2484 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
2486 /* Target vector for refreshing overlay mapped state */
2487 static void simple_overlay_update (struct obj_section
*);
2488 void (*target_overlay_update
) (struct obj_section
*) = simple_overlay_update
;
2490 /* Function: section_is_overlay (SECTION)
2491 Returns true if SECTION has VMA not equal to LMA, ie.
2492 SECTION is loaded at an address different from where it will "run". */
2495 section_is_overlay (asection
*section
)
2497 if (overlay_debugging
)
2498 if (section
&& section
->lma
!= 0 &&
2499 section
->vma
!= section
->lma
)
2505 /* Function: overlay_invalidate_all (void)
2506 Invalidate the mapped state of all overlay sections (mark it as stale). */
2509 overlay_invalidate_all (void)
2511 struct objfile
*objfile
;
2512 struct obj_section
*sect
;
2514 ALL_OBJSECTIONS (objfile
, sect
)
2515 if (section_is_overlay (sect
->the_bfd_section
))
2516 sect
->ovly_mapped
= -1;
2519 /* Function: overlay_is_mapped (SECTION)
2520 Returns true if section is an overlay, and is currently mapped.
2521 Private: public access is thru function section_is_mapped.
2523 Access to the ovly_mapped flag is restricted to this function, so
2524 that we can do automatic update. If the global flag
2525 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2526 overlay_invalidate_all. If the mapped state of the particular
2527 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2530 overlay_is_mapped (struct obj_section
*osect
)
2532 if (osect
== 0 || !section_is_overlay (osect
->the_bfd_section
))
2535 switch (overlay_debugging
)
2539 return 0; /* overlay debugging off */
2540 case -1: /* overlay debugging automatic */
2541 /* Unles there is a target_overlay_update function,
2542 there's really nothing useful to do here (can't really go auto) */
2543 if (target_overlay_update
)
2545 if (overlay_cache_invalid
)
2547 overlay_invalidate_all ();
2548 overlay_cache_invalid
= 0;
2550 if (osect
->ovly_mapped
== -1)
2551 (*target_overlay_update
) (osect
);
2553 /* fall thru to manual case */
2554 case 1: /* overlay debugging manual */
2555 return osect
->ovly_mapped
== 1;
2559 /* Function: section_is_mapped
2560 Returns true if section is an overlay, and is currently mapped. */
2563 section_is_mapped (asection
*section
)
2565 struct objfile
*objfile
;
2566 struct obj_section
*osect
;
2568 if (overlay_debugging
)
2569 if (section
&& section_is_overlay (section
))
2570 ALL_OBJSECTIONS (objfile
, osect
)
2571 if (osect
->the_bfd_section
== section
)
2572 return overlay_is_mapped (osect
);
2577 /* Function: pc_in_unmapped_range
2578 If PC falls into the lma range of SECTION, return true, else false. */
2581 pc_in_unmapped_range (CORE_ADDR pc
, asection
*section
)
2585 if (overlay_debugging
)
2586 if (section
&& section_is_overlay (section
))
2588 size
= bfd_get_section_size_before_reloc (section
);
2589 if (section
->lma
<= pc
&& pc
< section
->lma
+ size
)
2595 /* Function: pc_in_mapped_range
2596 If PC falls into the vma range of SECTION, return true, else false. */
2599 pc_in_mapped_range (CORE_ADDR pc
, asection
*section
)
2603 if (overlay_debugging
)
2604 if (section
&& section_is_overlay (section
))
2606 size
= bfd_get_section_size_before_reloc (section
);
2607 if (section
->vma
<= pc
&& pc
< section
->vma
+ size
)
2613 /* Function: overlay_unmapped_address (PC, SECTION)
2614 Returns the address corresponding to PC in the unmapped (load) range.
2615 May be the same as PC. */
2618 overlay_unmapped_address (CORE_ADDR pc
, asection
*section
)
2620 if (overlay_debugging
)
2621 if (section
&& section_is_overlay (section
) &&
2622 pc_in_mapped_range (pc
, section
))
2623 return pc
+ section
->lma
- section
->vma
;
2628 /* Function: overlay_mapped_address (PC, SECTION)
2629 Returns the address corresponding to PC in the mapped (runtime) range.
2630 May be the same as PC. */
2633 overlay_mapped_address (CORE_ADDR pc
, asection
*section
)
2635 if (overlay_debugging
)
2636 if (section
&& section_is_overlay (section
) &&
2637 pc_in_unmapped_range (pc
, section
))
2638 return pc
+ section
->vma
- section
->lma
;
2644 /* Function: symbol_overlayed_address
2645 Return one of two addresses (relative to the VMA or to the LMA),
2646 depending on whether the section is mapped or not. */
2649 symbol_overlayed_address (CORE_ADDR address
, asection
*section
)
2651 if (overlay_debugging
)
2653 /* If the symbol has no section, just return its regular address. */
2656 /* If the symbol's section is not an overlay, just return its address */
2657 if (!section_is_overlay (section
))
2659 /* If the symbol's section is mapped, just return its address */
2660 if (section_is_mapped (section
))
2663 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
2664 * then return its LOADED address rather than its vma address!!
2666 return overlay_unmapped_address (address
, section
);
2671 /* Function: find_pc_overlay (PC)
2672 Return the best-match overlay section for PC:
2673 If PC matches a mapped overlay section's VMA, return that section.
2674 Else if PC matches an unmapped section's VMA, return that section.
2675 Else if PC matches an unmapped section's LMA, return that section. */
2678 find_pc_overlay (CORE_ADDR pc
)
2680 struct objfile
*objfile
;
2681 struct obj_section
*osect
, *best_match
= NULL
;
2683 if (overlay_debugging
)
2684 ALL_OBJSECTIONS (objfile
, osect
)
2685 if (section_is_overlay (osect
->the_bfd_section
))
2687 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
))
2689 if (overlay_is_mapped (osect
))
2690 return osect
->the_bfd_section
;
2694 else if (pc_in_unmapped_range (pc
, osect
->the_bfd_section
))
2697 return best_match
? best_match
->the_bfd_section
: NULL
;
2700 /* Function: find_pc_mapped_section (PC)
2701 If PC falls into the VMA address range of an overlay section that is
2702 currently marked as MAPPED, return that section. Else return NULL. */
2705 find_pc_mapped_section (CORE_ADDR pc
)
2707 struct objfile
*objfile
;
2708 struct obj_section
*osect
;
2710 if (overlay_debugging
)
2711 ALL_OBJSECTIONS (objfile
, osect
)
2712 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
) &&
2713 overlay_is_mapped (osect
))
2714 return osect
->the_bfd_section
;
2719 /* Function: list_overlays_command
2720 Print a list of mapped sections and their PC ranges */
2723 list_overlays_command (char *args
, int from_tty
)
2726 struct objfile
*objfile
;
2727 struct obj_section
*osect
;
2729 if (overlay_debugging
)
2730 ALL_OBJSECTIONS (objfile
, osect
)
2731 if (overlay_is_mapped (osect
))
2737 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
2738 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
2739 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
2740 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
2742 printf_filtered ("Section %s, loaded at ", name
);
2743 print_address_numeric (lma
, 1, gdb_stdout
);
2744 puts_filtered (" - ");
2745 print_address_numeric (lma
+ size
, 1, gdb_stdout
);
2746 printf_filtered (", mapped at ");
2747 print_address_numeric (vma
, 1, gdb_stdout
);
2748 puts_filtered (" - ");
2749 print_address_numeric (vma
+ size
, 1, gdb_stdout
);
2750 puts_filtered ("\n");
2755 printf_filtered ("No sections are mapped.\n");
2758 /* Function: map_overlay_command
2759 Mark the named section as mapped (ie. residing at its VMA address). */
2762 map_overlay_command (char *args
, int from_tty
)
2764 struct objfile
*objfile
, *objfile2
;
2765 struct obj_section
*sec
, *sec2
;
2768 if (!overlay_debugging
)
2770 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
2771 the 'overlay manual' command.");
2773 if (args
== 0 || *args
== 0)
2774 error ("Argument required: name of an overlay section");
2776 /* First, find a section matching the user supplied argument */
2777 ALL_OBJSECTIONS (objfile
, sec
)
2778 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
2780 /* Now, check to see if the section is an overlay. */
2781 bfdsec
= sec
->the_bfd_section
;
2782 if (!section_is_overlay (bfdsec
))
2783 continue; /* not an overlay section */
2785 /* Mark the overlay as "mapped" */
2786 sec
->ovly_mapped
= 1;
2788 /* Next, make a pass and unmap any sections that are
2789 overlapped by this new section: */
2790 ALL_OBJSECTIONS (objfile2
, sec2
)
2791 if (sec2
->ovly_mapped
&&
2793 sec
->the_bfd_section
!= sec2
->the_bfd_section
&&
2794 (pc_in_mapped_range (sec2
->addr
, sec
->the_bfd_section
) ||
2795 pc_in_mapped_range (sec2
->endaddr
, sec
->the_bfd_section
)))
2798 printf_filtered ("Note: section %s unmapped by overlap\n",
2799 bfd_section_name (objfile
->obfd
,
2800 sec2
->the_bfd_section
));
2801 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
2805 error ("No overlay section called %s", args
);
2808 /* Function: unmap_overlay_command
2809 Mark the overlay section as unmapped
2810 (ie. resident in its LMA address range, rather than the VMA range). */
2813 unmap_overlay_command (char *args
, int from_tty
)
2815 struct objfile
*objfile
;
2816 struct obj_section
*sec
;
2818 if (!overlay_debugging
)
2820 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
2821 the 'overlay manual' command.");
2823 if (args
== 0 || *args
== 0)
2824 error ("Argument required: name of an overlay section");
2826 /* First, find a section matching the user supplied argument */
2827 ALL_OBJSECTIONS (objfile
, sec
)
2828 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
2830 if (!sec
->ovly_mapped
)
2831 error ("Section %s is not mapped", args
);
2832 sec
->ovly_mapped
= 0;
2835 error ("No overlay section called %s", args
);
2838 /* Function: overlay_auto_command
2839 A utility command to turn on overlay debugging.
2840 Possibly this should be done via a set/show command. */
2843 overlay_auto_command (char *args
, int from_tty
)
2845 overlay_debugging
= -1;
2847 printf_filtered ("Automatic overlay debugging enabled.");
2850 /* Function: overlay_manual_command
2851 A utility command to turn on overlay debugging.
2852 Possibly this should be done via a set/show command. */
2855 overlay_manual_command (char *args
, int from_tty
)
2857 overlay_debugging
= 1;
2859 printf_filtered ("Overlay debugging enabled.");
2862 /* Function: overlay_off_command
2863 A utility command to turn on overlay debugging.
2864 Possibly this should be done via a set/show command. */
2867 overlay_off_command (char *args
, int from_tty
)
2869 overlay_debugging
= 0;
2871 printf_filtered ("Overlay debugging disabled.");
2875 overlay_load_command (char *args
, int from_tty
)
2877 if (target_overlay_update
)
2878 (*target_overlay_update
) (NULL
);
2880 error ("This target does not know how to read its overlay state.");
2883 /* Function: overlay_command
2884 A place-holder for a mis-typed command */
2886 /* Command list chain containing all defined "overlay" subcommands. */
2887 struct cmd_list_element
*overlaylist
;
2890 overlay_command (char *args
, int from_tty
)
2893 ("\"overlay\" must be followed by the name of an overlay command.\n");
2894 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
2898 /* Target Overlays for the "Simplest" overlay manager:
2900 This is GDB's default target overlay layer. It works with the
2901 minimal overlay manager supplied as an example by Cygnus. The
2902 entry point is via a function pointer "target_overlay_update",
2903 so targets that use a different runtime overlay manager can
2904 substitute their own overlay_update function and take over the
2907 The overlay_update function pokes around in the target's data structures
2908 to see what overlays are mapped, and updates GDB's overlay mapping with
2911 In this simple implementation, the target data structures are as follows:
2912 unsigned _novlys; /# number of overlay sections #/
2913 unsigned _ovly_table[_novlys][4] = {
2914 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
2915 {..., ..., ..., ...},
2917 unsigned _novly_regions; /# number of overlay regions #/
2918 unsigned _ovly_region_table[_novly_regions][3] = {
2919 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
2922 These functions will attempt to update GDB's mappedness state in the
2923 symbol section table, based on the target's mappedness state.
2925 To do this, we keep a cached copy of the target's _ovly_table, and
2926 attempt to detect when the cached copy is invalidated. The main
2927 entry point is "simple_overlay_update(SECT), which looks up SECT in
2928 the cached table and re-reads only the entry for that section from
2929 the target (whenever possible).
2932 /* Cached, dynamically allocated copies of the target data structures: */
2933 static unsigned (*cache_ovly_table
)[4] = 0;
2935 static unsigned (*cache_ovly_region_table
)[3] = 0;
2937 static unsigned cache_novlys
= 0;
2939 static unsigned cache_novly_regions
= 0;
2941 static CORE_ADDR cache_ovly_table_base
= 0;
2943 static CORE_ADDR cache_ovly_region_table_base
= 0;
2947 VMA
, SIZE
, LMA
, MAPPED
2949 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
2951 /* Throw away the cached copy of _ovly_table */
2953 simple_free_overlay_table (void)
2955 if (cache_ovly_table
)
2956 free (cache_ovly_table
);
2958 cache_ovly_table
= NULL
;
2959 cache_ovly_table_base
= 0;
2963 /* Throw away the cached copy of _ovly_region_table */
2965 simple_free_overlay_region_table (void)
2967 if (cache_ovly_region_table
)
2968 free (cache_ovly_region_table
);
2969 cache_novly_regions
= 0;
2970 cache_ovly_region_table
= NULL
;
2971 cache_ovly_region_table_base
= 0;
2975 /* Read an array of ints from the target into a local buffer.
2976 Convert to host order. int LEN is number of ints */
2978 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
, int len
)
2980 char *buf
= alloca (len
* TARGET_LONG_BYTES
);
2983 read_memory (memaddr
, buf
, len
* TARGET_LONG_BYTES
);
2984 for (i
= 0; i
< len
; i
++)
2985 myaddr
[i
] = extract_unsigned_integer (TARGET_LONG_BYTES
* i
+ buf
,
2989 /* Find and grab a copy of the target _ovly_table
2990 (and _novlys, which is needed for the table's size) */
2992 simple_read_overlay_table (void)
2994 struct minimal_symbol
*msym
;
2996 simple_free_overlay_table ();
2997 msym
= lookup_minimal_symbol ("_novlys", 0, 0);
2999 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
3001 return 0; /* failure */
3002 cache_ovly_table
= (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3003 if (cache_ovly_table
!= NULL
)
3005 msym
= lookup_minimal_symbol ("_ovly_table", 0, 0);
3008 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3009 read_target_long_array (cache_ovly_table_base
,
3010 (int *) cache_ovly_table
,
3014 return 0; /* failure */
3017 return 0; /* failure */
3018 return 1; /* SUCCESS */
3022 /* Find and grab a copy of the target _ovly_region_table
3023 (and _novly_regions, which is needed for the table's size) */
3025 simple_read_overlay_region_table (void)
3027 struct minimal_symbol
*msym
;
3029 simple_free_overlay_region_table ();
3030 msym
= lookup_minimal_symbol ("_novly_regions", 0, 0);
3032 cache_novly_regions
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
3034 return 0; /* failure */
3035 cache_ovly_region_table
= (void *) xmalloc (cache_novly_regions
* 12);
3036 if (cache_ovly_region_table
!= NULL
)
3038 msym
= lookup_minimal_symbol ("_ovly_region_table", 0, 0);
3041 cache_ovly_region_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3042 read_target_long_array (cache_ovly_region_table_base
,
3043 (int *) cache_ovly_region_table
,
3044 cache_novly_regions
* 3);
3047 return 0; /* failure */
3050 return 0; /* failure */
3051 return 1; /* SUCCESS */
3055 /* Function: simple_overlay_update_1
3056 A helper function for simple_overlay_update. Assuming a cached copy
3057 of _ovly_table exists, look through it to find an entry whose vma,
3058 lma and size match those of OSECT. Re-read the entry and make sure
3059 it still matches OSECT (else the table may no longer be valid).
3060 Set OSECT's mapped state to match the entry. Return: 1 for
3061 success, 0 for failure. */
3064 simple_overlay_update_1 (struct obj_section
*osect
)
3068 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3069 for (i
= 0; i
< cache_novlys
; i
++)
3070 if (cache_ovly_table
[i
][VMA
] == osect
->the_bfd_section
->vma
&&
3071 cache_ovly_table
[i
][LMA
] == osect
->the_bfd_section
->lma
/* &&
3072 cache_ovly_table[i][SIZE] == size */ )
3074 read_target_long_array (cache_ovly_table_base
+ i
* TARGET_LONG_BYTES
,
3075 (int *) cache_ovly_table
[i
], 4);
3076 if (cache_ovly_table
[i
][VMA
] == osect
->the_bfd_section
->vma
&&
3077 cache_ovly_table
[i
][LMA
] == osect
->the_bfd_section
->lma
/* &&
3078 cache_ovly_table[i][SIZE] == size */ )
3080 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3083 else /* Warning! Warning! Target's ovly table has changed! */
3089 /* Function: simple_overlay_update
3090 If OSECT is NULL, then update all sections' mapped state
3091 (after re-reading the entire target _ovly_table).
3092 If OSECT is non-NULL, then try to find a matching entry in the
3093 cached ovly_table and update only OSECT's mapped state.
3094 If a cached entry can't be found or the cache isn't valid, then
3095 re-read the entire cache, and go ahead and update all sections. */
3098 simple_overlay_update (struct obj_section
*osect
)
3100 struct objfile
*objfile
;
3102 /* Were we given an osect to look up? NULL means do all of them. */
3104 /* Have we got a cached copy of the target's overlay table? */
3105 if (cache_ovly_table
!= NULL
)
3106 /* Does its cached location match what's currently in the symtab? */
3107 if (cache_ovly_table_base
==
3108 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", 0, 0)))
3109 /* Then go ahead and try to look up this single section in the cache */
3110 if (simple_overlay_update_1 (osect
))
3111 /* Found it! We're done. */
3114 /* Cached table no good: need to read the entire table anew.
3115 Or else we want all the sections, in which case it's actually
3116 more efficient to read the whole table in one block anyway. */
3118 if (simple_read_overlay_table () == 0) /* read failed? No table? */
3120 warning ("Failed to read the target overlay mapping table.");
3123 /* Now may as well update all sections, even if only one was requested. */
3124 ALL_OBJSECTIONS (objfile
, osect
)
3125 if (section_is_overlay (osect
->the_bfd_section
))
3129 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3130 for (i
= 0; i
< cache_novlys
; i
++)
3131 if (cache_ovly_table
[i
][VMA
] == osect
->the_bfd_section
->vma
&&
3132 cache_ovly_table
[i
][LMA
] == osect
->the_bfd_section
->lma
/* &&
3133 cache_ovly_table[i][SIZE] == size */ )
3134 { /* obj_section matches i'th entry in ovly_table */
3135 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3136 break; /* finished with inner for loop: break out */
3143 _initialize_symfile (void)
3145 struct cmd_list_element
*c
;
3147 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
,
3148 "Load symbol table from executable file FILE.\n\
3149 The `file' command can also load symbol tables, as well as setting the file\n\
3150 to execute.", &cmdlist
);
3151 c
->completer
= filename_completer
;
3153 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
,
3154 "Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3155 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3156 ADDR is the starting address of the file's text.\n\
3157 The optional arguments are section-name section-address pairs and\n\
3158 should be specified if the data and bss segments are not contiguous\n\
3159 with the text. SECT is a section name to be loaded at SECT_ADDR.",
3161 c
->completer
= filename_completer
;
3163 c
= add_cmd ("add-shared-symbol-files", class_files
,
3164 add_shared_symbol_files_command
,
3165 "Load the symbols from shared objects in the dynamic linker's link map.",
3167 c
= add_alias_cmd ("assf", "add-shared-symbol-files", class_files
, 1,
3170 c
= add_cmd ("load", class_files
, load_command
,
3171 "Dynamically load FILE into the running program, and record its symbols\n\
3172 for access from GDB.", &cmdlist
);
3173 c
->completer
= filename_completer
;
3176 (add_set_cmd ("symbol-reloading", class_support
, var_boolean
,
3177 (char *) &symbol_reloading
,
3178 "Set dynamic symbol table reloading multiple times in one run.",
3182 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3183 "Commands for debugging overlays.", &overlaylist
,
3184 "overlay ", 0, &cmdlist
);
3186 add_com_alias ("ovly", "overlay", class_alias
, 1);
3187 add_com_alias ("ov", "overlay", class_alias
, 1);
3189 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3190 "Assert that an overlay section is mapped.", &overlaylist
);
3192 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3193 "Assert that an overlay section is unmapped.", &overlaylist
);
3195 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3196 "List mappings of overlay sections.", &overlaylist
);
3198 add_cmd ("manual", class_support
, overlay_manual_command
,
3199 "Enable overlay debugging.", &overlaylist
);
3200 add_cmd ("off", class_support
, overlay_off_command
,
3201 "Disable overlay debugging.", &overlaylist
);
3202 add_cmd ("auto", class_support
, overlay_auto_command
,
3203 "Enable automatic overlay debugging.", &overlaylist
);
3204 add_cmd ("load-target", class_support
, overlay_load_command
,
3205 "Read the overlay mapping state from the target.", &overlaylist
);
3207 /* Filename extension to source language lookup table: */
3208 init_filename_language_table ();
3209 c
= add_set_cmd ("extension-language", class_files
, var_string_noescape
,
3211 "Set mapping between filename extension and source language.\n\
3212 Usage: set extension-language .foo bar",
3214 c
->function
.cfunc
= set_ext_lang_command
;
3216 add_info ("extensions", info_ext_lang_command
,
3217 "All filename extensions associated with a source language.");
3220 (add_set_cmd ("download-write-size", class_obscure
,
3221 var_integer
, (char *) &download_write_size
,
3222 "Set the write size used when downloading a program.\n"
3223 "Only used when downloading a program onto a remote\n"
3224 "target. Specify zero, or a negative value, to disable\n"
3225 "blocked writes. The actual size of each transfer is also\n"
3226 "limited by the size of the target packet and the memory\n"