1 /* Generic symbol file reading for the GNU debugger, GDB.
2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
3 2000, 2001 Free Software Foundation, Inc.
4 Contributed by Cygnus Support, using pieces from other GDB modules.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
33 #include "breakpoint.h"
35 #include "complaints.h"
37 #include "inferior.h" /* for write_pc */
38 #include "gdb-stabs.h"
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 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
);
114 static void add_symbol_file_command (char *, int);
116 static void add_shared_symbol_files_command (char *, int);
118 static void cashier_psymtab (struct partial_symtab
*);
120 static int compare_psymbols (const PTR
, const PTR
);
122 static int compare_symbols (const PTR
, const PTR
);
124 bfd
*symfile_bfd_open (char *);
126 static void find_sym_fns (struct objfile
*);
128 static void decrement_reading_symtab (void *);
130 static void overlay_invalidate_all (void);
132 static int overlay_is_mapped (struct obj_section
*);
134 void list_overlays_command (char *, int);
136 void map_overlay_command (char *, int);
138 void unmap_overlay_command (char *, int);
140 static void overlay_auto_command (char *, int);
142 static void overlay_manual_command (char *, int);
144 static void overlay_off_command (char *, int);
146 static void overlay_load_command (char *, int);
148 static void overlay_command (char *, int);
150 static void simple_free_overlay_table (void);
152 static void read_target_long_array (CORE_ADDR
, unsigned int *, int);
154 static int simple_read_overlay_table (void);
156 static int simple_overlay_update_1 (struct obj_section
*);
158 static void add_filename_language (char *ext
, enum language lang
);
160 static void set_ext_lang_command (char *args
, int from_tty
);
162 static void info_ext_lang_command (char *args
, int from_tty
);
164 static void init_filename_language_table (void);
166 void _initialize_symfile (void);
168 /* List of all available sym_fns. On gdb startup, each object file reader
169 calls add_symtab_fns() to register information on each format it is
172 static struct sym_fns
*symtab_fns
= NULL
;
174 /* Flag for whether user will be reloading symbols multiple times.
175 Defaults to ON for VxWorks, otherwise OFF. */
177 #ifdef SYMBOL_RELOADING_DEFAULT
178 int symbol_reloading
= SYMBOL_RELOADING_DEFAULT
;
180 int symbol_reloading
= 0;
183 /* If non-zero, then on HP-UX (i.e., platforms that use somsolib.c),
184 this variable is interpreted as a threshhold. If adding a new
185 library's symbol table to those already known to the debugger would
186 exceed this threshhold, then the shlib's symbols are not added.
188 If non-zero on other platforms, shared library symbols will be added
189 automatically when the inferior is created, new libraries are loaded,
190 or when attaching to the inferior. This is almost always what users
191 will want to have happen; but for very large programs, the startup
192 time will be excessive, and so if this is a problem, the user can
193 clear this flag and then add the shared library symbols as needed.
194 Note that there is a potential for confusion, since if the shared
195 library symbols are not loaded, commands like "info fun" will *not*
196 report all the functions that are actually present.
198 Note that HP-UX interprets this variable to mean, "threshhold size
199 in megabytes, where zero means never add". Other platforms interpret
200 this variable to mean, "always add if non-zero, never add if zero."
203 int auto_solib_add
= 1;
206 /* Since this function is called from within qsort, in an ANSI environment
207 it must conform to the prototype for qsort, which specifies that the
208 comparison function takes two "void *" pointers. */
211 compare_symbols (const PTR s1p
, const PTR s2p
)
213 register struct symbol
**s1
, **s2
;
215 s1
= (struct symbol
**) s1p
;
216 s2
= (struct symbol
**) s2p
;
217 return (strcmp (SYMBOL_SOURCE_NAME (*s1
), SYMBOL_SOURCE_NAME (*s2
)));
224 compare_psymbols -- compare two partial symbols by name
228 Given pointers to pointers to two partial symbol table entries,
229 compare them by name and return -N, 0, or +N (ala strcmp).
230 Typically used by sorting routines like qsort().
234 Does direct compare of first two characters before punting
235 and passing to strcmp for longer compares. Note that the
236 original version had a bug whereby two null strings or two
237 identically named one character strings would return the
238 comparison of memory following the null byte.
243 compare_psymbols (const PTR s1p
, const PTR s2p
)
245 register struct partial_symbol
**s1
, **s2
;
246 register char *st1
, *st2
;
248 s1
= (struct partial_symbol
**) s1p
;
249 s2
= (struct partial_symbol
**) s2p
;
250 st1
= SYMBOL_SOURCE_NAME (*s1
);
251 st2
= SYMBOL_SOURCE_NAME (*s2
);
254 if ((st1
[0] - st2
[0]) || !st1
[0])
256 return (st1
[0] - st2
[0]);
258 else if ((st1
[1] - st2
[1]) || !st1
[1])
260 return (st1
[1] - st2
[1]);
264 return (strcmp (st1
, st2
));
269 sort_pst_symbols (struct partial_symtab
*pst
)
271 /* Sort the global list; don't sort the static list */
273 qsort (pst
->objfile
->global_psymbols
.list
+ pst
->globals_offset
,
274 pst
->n_global_syms
, sizeof (struct partial_symbol
*),
278 /* Call sort_block_syms to sort alphabetically the symbols of one block. */
281 sort_block_syms (register struct block
*b
)
283 qsort (&BLOCK_SYM (b
, 0), BLOCK_NSYMS (b
),
284 sizeof (struct symbol
*), compare_symbols
);
287 /* Call sort_symtab_syms to sort alphabetically
288 the symbols of each block of one symtab. */
291 sort_symtab_syms (register struct symtab
*s
)
293 register struct blockvector
*bv
;
296 register struct block
*b
;
300 bv
= BLOCKVECTOR (s
);
301 nbl
= BLOCKVECTOR_NBLOCKS (bv
);
302 for (i
= 0; i
< nbl
; i
++)
304 b
= BLOCKVECTOR_BLOCK (bv
, i
);
305 if (BLOCK_SHOULD_SORT (b
))
310 /* Make a null terminated copy of the string at PTR with SIZE characters in
311 the obstack pointed to by OBSTACKP . Returns the address of the copy.
312 Note that the string at PTR does not have to be null terminated, I.E. it
313 may be part of a larger string and we are only saving a substring. */
316 obsavestring (char *ptr
, int size
, struct obstack
*obstackp
)
318 register char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
319 /* Open-coded memcpy--saves function call time. These strings are usually
320 short. FIXME: Is this really still true with a compiler that can
323 register char *p1
= ptr
;
324 register char *p2
= p
;
325 char *end
= ptr
+ size
;
333 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
334 in the obstack pointed to by OBSTACKP. */
337 obconcat (struct obstack
*obstackp
, const char *s1
, const char *s2
,
340 register int len
= strlen (s1
) + strlen (s2
) + strlen (s3
) + 1;
341 register char *val
= (char *) obstack_alloc (obstackp
, len
);
348 /* True if we are nested inside psymtab_to_symtab. */
350 int currently_reading_symtab
= 0;
353 decrement_reading_symtab (void *dummy
)
355 currently_reading_symtab
--;
358 /* Get the symbol table that corresponds to a partial_symtab.
359 This is fast after the first time you do it. In fact, there
360 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
364 psymtab_to_symtab (register struct partial_symtab
*pst
)
366 /* If it's been looked up before, return it. */
370 /* If it has not yet been read in, read it. */
373 struct cleanup
*back_to
= make_cleanup (decrement_reading_symtab
, NULL
);
374 currently_reading_symtab
++;
375 (*pst
->read_symtab
) (pst
);
376 do_cleanups (back_to
);
382 /* Initialize entry point information for this objfile. */
385 init_entry_point_info (struct objfile
*objfile
)
387 /* Save startup file's range of PC addresses to help blockframe.c
388 decide where the bottom of the stack is. */
390 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
392 /* Executable file -- record its entry point so we'll recognize
393 the startup file because it contains the entry point. */
394 objfile
->ei
.entry_point
= bfd_get_start_address (objfile
->obfd
);
398 /* Examination of non-executable.o files. Short-circuit this stuff. */
399 objfile
->ei
.entry_point
= INVALID_ENTRY_POINT
;
401 objfile
->ei
.entry_file_lowpc
= INVALID_ENTRY_LOWPC
;
402 objfile
->ei
.entry_file_highpc
= INVALID_ENTRY_HIGHPC
;
403 objfile
->ei
.entry_func_lowpc
= INVALID_ENTRY_LOWPC
;
404 objfile
->ei
.entry_func_highpc
= INVALID_ENTRY_HIGHPC
;
405 objfile
->ei
.main_func_lowpc
= INVALID_ENTRY_LOWPC
;
406 objfile
->ei
.main_func_highpc
= INVALID_ENTRY_HIGHPC
;
409 /* Get current entry point address. */
412 entry_point_address (void)
414 return symfile_objfile
? symfile_objfile
->ei
.entry_point
: 0;
417 /* Remember the lowest-addressed loadable section we've seen.
418 This function is called via bfd_map_over_sections.
420 In case of equal vmas, the section with the largest size becomes the
421 lowest-addressed loadable section.
423 If the vmas and sizes are equal, the last section is considered the
424 lowest-addressed loadable section. */
427 find_lowest_section (bfd
*abfd
, asection
*sect
, PTR obj
)
429 asection
**lowest
= (asection
**) obj
;
431 if (0 == (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
))
434 *lowest
= sect
; /* First loadable section */
435 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
436 *lowest
= sect
; /* A lower loadable section */
437 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
438 && (bfd_section_size (abfd
, (*lowest
))
439 <= bfd_section_size (abfd
, sect
)))
444 /* Build (allocate and populate) a section_addr_info struct from
445 an existing section table. */
447 extern struct section_addr_info
*
448 build_section_addr_info_from_section_table (const struct section_table
*start
,
449 const struct section_table
*end
)
451 struct section_addr_info
*sap
;
452 const struct section_table
*stp
;
455 sap
= xmalloc (sizeof (struct section_addr_info
));
456 memset (sap
, 0, sizeof (struct section_addr_info
));
458 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
460 if (stp
->the_bfd_section
->flags
& (SEC_ALLOC
| SEC_LOAD
)
461 && oidx
< MAX_SECTIONS
)
463 sap
->other
[oidx
].addr
= stp
->addr
;
464 sap
->other
[oidx
].name
= xstrdup (stp
->the_bfd_section
->name
);
465 sap
->other
[oidx
].sectindex
= stp
->the_bfd_section
->index
;
474 /* Free all memory allocated by build_section_addr_info_from_section_table. */
477 free_section_addr_info (struct section_addr_info
*sap
)
481 for (idx
= 0; idx
< MAX_SECTIONS
; idx
++)
482 if (sap
->other
[idx
].name
)
483 xfree (sap
->other
[idx
].name
);
488 /* Parse the user's idea of an offset for dynamic linking, into our idea
489 of how to represent it for fast symbol reading. This is the default
490 version of the sym_fns.sym_offsets function for symbol readers that
491 don't need to do anything special. It allocates a section_offsets table
492 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
495 default_symfile_offsets (struct objfile
*objfile
,
496 struct section_addr_info
*addrs
)
499 asection
*sect
= NULL
;
501 objfile
->num_sections
= SECT_OFF_MAX
;
502 objfile
->section_offsets
= (struct section_offsets
*)
503 obstack_alloc (&objfile
->psymbol_obstack
, SIZEOF_SECTION_OFFSETS
);
504 memset (objfile
->section_offsets
, 0, SIZEOF_SECTION_OFFSETS
);
506 /* Now calculate offsets for section that were specified by the
508 for (i
= 0; i
< MAX_SECTIONS
&& addrs
->other
[i
].name
; i
++)
510 struct other_sections
*osp
;
512 osp
= &addrs
->other
[i
] ;
516 /* Record all sections in offsets */
517 /* The section_offsets in the objfile are here filled in using
519 (objfile
->section_offsets
)->offsets
[osp
->sectindex
] = osp
->addr
;
522 /* Remember the bfd indexes for the .text, .data, .bss and
525 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
527 objfile
->sect_index_text
= sect
->index
;
529 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
531 objfile
->sect_index_data
= sect
->index
;
533 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
535 objfile
->sect_index_bss
= sect
->index
;
537 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
539 objfile
->sect_index_rodata
= sect
->index
;
543 /* Process a symbol file, as either the main file or as a dynamically
546 OBJFILE is where the symbols are to be read from.
548 ADDR is the address where the text segment was loaded, unless the
549 objfile is the main symbol file, in which case it is zero.
551 MAINLINE is nonzero if this is the main symbol file, or zero if
552 it's an extra symbol file such as dynamically loaded code.
554 VERBO is nonzero if the caller has printed a verbose message about
555 the symbol reading (and complaints can be more terse about it). */
558 syms_from_objfile (struct objfile
*objfile
, struct section_addr_info
*addrs
,
559 int mainline
, int verbo
)
561 asection
*lower_sect
;
563 CORE_ADDR lower_offset
;
564 struct section_addr_info local_addr
;
565 struct cleanup
*old_chain
;
568 /* If ADDRS is NULL, initialize the local section_addr_info struct and
569 point ADDRS to it. We now establish the convention that an addr of
570 zero means no load address was specified. */
574 memset (&local_addr
, 0, sizeof (local_addr
));
578 init_entry_point_info (objfile
);
579 find_sym_fns (objfile
);
581 /* Make sure that partially constructed symbol tables will be cleaned up
582 if an error occurs during symbol reading. */
583 old_chain
= make_cleanup_free_objfile (objfile
);
587 /* We will modify the main symbol table, make sure that all its users
588 will be cleaned up if an error occurs during symbol reading. */
589 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
591 /* Since no error yet, throw away the old symbol table. */
593 if (symfile_objfile
!= NULL
)
595 free_objfile (symfile_objfile
);
596 symfile_objfile
= NULL
;
599 /* Currently we keep symbols from the add-symbol-file command.
600 If the user wants to get rid of them, they should do "symbol-file"
601 without arguments first. Not sure this is the best behavior
604 (*objfile
->sf
->sym_new_init
) (objfile
);
607 /* Convert addr into an offset rather than an absolute address.
608 We find the lowest address of a loaded segment in the objfile,
609 and assume that <addr> is where that got loaded.
611 We no longer warn if the lowest section is not a text segment (as
612 happens for the PA64 port. */
615 /* Find lowest loadable section to be used as starting point for
616 continguous sections. FIXME!! won't work without call to find
617 .text first, but this assumes text is lowest section. */
618 lower_sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
619 if (lower_sect
== NULL
)
620 bfd_map_over_sections (objfile
->obfd
, find_lowest_section
,
622 if (lower_sect
== NULL
)
623 warning ("no loadable sections found in added symbol-file %s",
626 if ((bfd_get_section_flags (objfile
->obfd
, lower_sect
) & SEC_CODE
) == 0)
627 warning ("Lowest section in %s is %s at %s",
629 bfd_section_name (objfile
->obfd
, lower_sect
),
630 paddr (bfd_section_vma (objfile
->obfd
, lower_sect
)));
631 if (lower_sect
!= NULL
)
632 lower_offset
= bfd_section_vma (objfile
->obfd
, lower_sect
);
636 /* Calculate offsets for the loadable sections.
637 FIXME! Sections must be in order of increasing loadable section
638 so that contiguous sections can use the lower-offset!!!
640 Adjust offsets if the segments are not contiguous.
641 If the section is contiguous, its offset should be set to
642 the offset of the highest loadable section lower than it
643 (the loadable section directly below it in memory).
644 this_offset = lower_offset = lower_addr - lower_orig_addr */
646 /* Calculate offsets for sections. */
647 for (i
=0 ; i
< MAX_SECTIONS
&& addrs
->other
[i
].name
; i
++)
649 if (addrs
->other
[i
].addr
!= 0)
651 sect
= bfd_get_section_by_name (objfile
->obfd
, addrs
->other
[i
].name
);
654 addrs
->other
[i
].addr
-= bfd_section_vma (objfile
->obfd
, sect
);
655 lower_offset
= addrs
->other
[i
].addr
;
656 /* This is the index used by BFD. */
657 addrs
->other
[i
].sectindex
= sect
->index
;
661 warning ("section %s not found in %s", addrs
->other
[i
].name
,
663 addrs
->other
[i
].addr
= 0;
667 addrs
->other
[i
].addr
= lower_offset
;
671 /* Initialize symbol reading routines for this objfile, allow complaints to
672 appear for this new file, and record how verbose to be, then do the
673 initial symbol reading for this file. */
675 (*objfile
->sf
->sym_init
) (objfile
);
676 clear_complaints (1, verbo
);
678 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
680 #ifndef IBM6000_TARGET
681 /* This is a SVR4/SunOS specific hack, I think. In any event, it
682 screws RS/6000. sym_offsets should be doing this sort of thing,
683 because it knows the mapping between bfd sections and
685 /* This is a hack. As far as I can tell, section offsets are not
686 target dependent. They are all set to addr with a couple of
687 exceptions. The exceptions are sysvr4 shared libraries, whose
688 offsets are kept in solib structures anyway and rs6000 xcoff
689 which handles shared libraries in a completely unique way.
691 Section offsets are built similarly, except that they are built
692 by adding addr in all cases because there is no clear mapping
693 from section_offsets into actual sections. Note that solib.c
694 has a different algorithm for finding section offsets.
696 These should probably all be collapsed into some target
697 independent form of shared library support. FIXME. */
701 struct obj_section
*s
;
703 /* Map section offsets in "addr" back to the object's
704 sections by comparing the section names with bfd's
705 section names. Then adjust the section address by
706 the offset. */ /* for gdb/13815 */
708 ALL_OBJFILE_OSECTIONS (objfile
, s
)
710 CORE_ADDR s_addr
= 0;
714 !s_addr
&& i
< MAX_SECTIONS
&& addrs
->other
[i
].name
;
716 if (strcmp (s
->the_bfd_section
->name
, addrs
->other
[i
].name
) == 0)
717 s_addr
= addrs
->other
[i
].addr
; /* end added for gdb/13815 */
719 s
->addr
-= s
->offset
;
721 s
->endaddr
-= s
->offset
;
722 s
->endaddr
+= s_addr
;
726 #endif /* not IBM6000_TARGET */
728 (*objfile
->sf
->sym_read
) (objfile
, mainline
);
730 if (!have_partial_symbols () && !have_full_symbols ())
733 printf_filtered ("(no debugging symbols found)...");
737 /* Don't allow char * to have a typename (else would get caddr_t).
738 Ditto void *. FIXME: Check whether this is now done by all the
739 symbol readers themselves (many of them now do), and if so remove
742 TYPE_NAME (lookup_pointer_type (builtin_type_char
)) = 0;
743 TYPE_NAME (lookup_pointer_type (builtin_type_void
)) = 0;
745 /* Mark the objfile has having had initial symbol read attempted. Note
746 that this does not mean we found any symbols... */
748 objfile
->flags
|= OBJF_SYMS
;
750 /* Discard cleanups as symbol reading was successful. */
752 discard_cleanups (old_chain
);
754 /* Call this after reading in a new symbol table to give target
755 dependent code a crack at the new symbols. For instance, this
756 could be used to update the values of target-specific symbols GDB
757 needs to keep track of (such as _sigtramp, or whatever). */
759 TARGET_SYMFILE_POSTREAD (objfile
);
762 /* Perform required actions after either reading in the initial
763 symbols for a new objfile, or mapping in the symbols from a reusable
767 new_symfile_objfile (struct objfile
*objfile
, int mainline
, int verbo
)
770 /* If this is the main symbol file we have to clean up all users of the
771 old main symbol file. Otherwise it is sufficient to fixup all the
772 breakpoints that may have been redefined by this symbol file. */
775 /* OK, make it the "real" symbol file. */
776 symfile_objfile
= objfile
;
778 clear_symtab_users ();
782 breakpoint_re_set ();
785 /* We're done reading the symbol file; finish off complaints. */
786 clear_complaints (0, verbo
);
789 /* Process a symbol file, as either the main file or as a dynamically
792 NAME is the file name (which will be tilde-expanded and made
793 absolute herein) (but we don't free or modify NAME itself).
794 FROM_TTY says how verbose to be. MAINLINE specifies whether this
795 is the main symbol file, or whether it's an extra symbol file such
796 as dynamically loaded code. If !mainline, ADDR is the address
797 where the text segment was loaded.
799 Upon success, returns a pointer to the objfile that was added.
800 Upon failure, jumps back to command level (never returns). */
803 symbol_file_add (char *name
, int from_tty
, struct section_addr_info
*addrs
,
804 int mainline
, int flags
)
806 struct objfile
*objfile
;
807 struct partial_symtab
*psymtab
;
810 /* Open a bfd for the file, and give user a chance to burp if we'd be
811 interactively wiping out any existing symbols. */
813 abfd
= symfile_bfd_open (name
);
815 if ((have_full_symbols () || have_partial_symbols ())
818 && !query ("Load new symbol table from \"%s\"? ", name
))
819 error ("Not confirmed.");
821 objfile
= allocate_objfile (abfd
, flags
);
823 /* If the objfile uses a mapped symbol file, and we have a psymtab for
824 it, then skip reading any symbols at this time. */
826 if ((objfile
->flags
& OBJF_MAPPED
) && (objfile
->flags
& OBJF_SYMS
))
828 /* We mapped in an existing symbol table file that already has had
829 initial symbol reading performed, so we can skip that part. Notify
830 the user that instead of reading the symbols, they have been mapped.
832 if (from_tty
|| info_verbose
)
834 printf_filtered ("Mapped symbols for %s...", name
);
836 gdb_flush (gdb_stdout
);
838 init_entry_point_info (objfile
);
839 find_sym_fns (objfile
);
843 /* We either created a new mapped symbol table, mapped an existing
844 symbol table file which has not had initial symbol reading
845 performed, or need to read an unmapped symbol table. */
846 if (from_tty
|| info_verbose
)
848 if (pre_add_symbol_hook
)
849 pre_add_symbol_hook (name
);
852 printf_filtered ("Reading symbols from %s...", name
);
854 gdb_flush (gdb_stdout
);
857 syms_from_objfile (objfile
, addrs
, mainline
, from_tty
);
860 /* We now have at least a partial symbol table. Check to see if the
861 user requested that all symbols be read on initial access via either
862 the gdb startup command line or on a per symbol file basis. Expand
863 all partial symbol tables for this objfile if so. */
865 if ((flags
& OBJF_READNOW
) || readnow_symbol_files
)
867 if (from_tty
|| info_verbose
)
869 printf_filtered ("expanding to full symbols...");
871 gdb_flush (gdb_stdout
);
874 for (psymtab
= objfile
->psymtabs
;
876 psymtab
= psymtab
->next
)
878 psymtab_to_symtab (psymtab
);
882 if (from_tty
|| info_verbose
)
884 if (post_add_symbol_hook
)
885 post_add_symbol_hook ();
888 printf_filtered ("done.\n");
889 gdb_flush (gdb_stdout
);
893 new_symfile_objfile (objfile
, mainline
, from_tty
);
895 if (target_new_objfile_hook
)
896 target_new_objfile_hook (objfile
);
901 /* Call symbol_file_add() with default values and update whatever is
902 affected by the loading of a new main().
903 Used when the file is supplied in the gdb command line
904 and by some targets with special loading requirements.
905 The auxiliary function, symbol_file_add_main_1(), has the flags
906 argument for the switches that can only be specified in the symbol_file
910 symbol_file_add_main (char *args
, int from_tty
)
912 symbol_file_add_main_1 (args
, from_tty
, 0);
916 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
918 symbol_file_add (args
, from_tty
, NULL
, 1, flags
);
921 RESET_HP_UX_GLOBALS ();
924 /* Getting new symbols may change our opinion about
925 what is frameless. */
926 reinit_frame_cache ();
928 set_initial_language ();
932 symbol_file_clear (int from_tty
)
934 if ((have_full_symbols () || have_partial_symbols ())
936 && !query ("Discard symbol table from `%s'? ",
937 symfile_objfile
->name
))
938 error ("Not confirmed.");
939 free_all_objfiles ();
941 /* solib descriptors may have handles to objfiles. Since their
942 storage has just been released, we'd better wipe the solib
945 #if defined(SOLIB_RESTART)
949 symfile_objfile
= NULL
;
951 printf_unfiltered ("No symbol file now.\n");
953 RESET_HP_UX_GLOBALS ();
957 /* This is the symbol-file command. Read the file, analyze its
958 symbols, and add a struct symtab to a symtab list. The syntax of
959 the command is rather bizarre--(1) buildargv implements various
960 quoting conventions which are undocumented and have little or
961 nothing in common with the way things are quoted (or not quoted)
962 elsewhere in GDB, (2) options are used, which are not generally
963 used in GDB (perhaps "set mapped on", "set readnow on" would be
964 better), (3) the order of options matters, which is contrary to GNU
965 conventions (because it is confusing and inconvenient). */
966 /* Note: ezannoni 2000-04-17. This function used to have support for
967 rombug (see remote-os9k.c). It consisted of a call to target_link()
968 (target.c) to get the address of the text segment from the target,
969 and pass that to symbol_file_add(). This is no longer supported. */
972 symbol_file_command (char *args
, int from_tty
)
976 struct cleanup
*cleanups
;
977 int flags
= OBJF_USERLOADED
;
983 symbol_file_clear (from_tty
);
987 if ((argv
= buildargv (args
)) == NULL
)
991 cleanups
= make_cleanup_freeargv (argv
);
992 while (*argv
!= NULL
)
994 if (STREQ (*argv
, "-mapped"))
995 flags
|= OBJF_MAPPED
;
997 if (STREQ (*argv
, "-readnow"))
998 flags
|= OBJF_READNOW
;
1001 error ("unknown option `%s'", *argv
);
1006 symbol_file_add_main_1 (name
, from_tty
, flags
);
1013 error ("no symbol file name was specified");
1015 TUIDO (((TuiOpaqueFuncPtr
) tuiDisplayMainFunction
));
1016 do_cleanups (cleanups
);
1020 /* Set the initial language.
1022 A better solution would be to record the language in the psymtab when reading
1023 partial symbols, and then use it (if known) to set the language. This would
1024 be a win for formats that encode the language in an easily discoverable place,
1025 such as DWARF. For stabs, we can jump through hoops looking for specially
1026 named symbols or try to intuit the language from the specific type of stabs
1027 we find, but we can't do that until later when we read in full symbols.
1031 set_initial_language (void)
1033 struct partial_symtab
*pst
;
1034 enum language lang
= language_unknown
;
1036 pst
= find_main_psymtab ();
1039 if (pst
->filename
!= NULL
)
1041 lang
= deduce_language_from_filename (pst
->filename
);
1043 if (lang
== language_unknown
)
1045 /* Make C the default language */
1048 set_language (lang
);
1049 expected_language
= current_language
; /* Don't warn the user */
1053 /* Open file specified by NAME and hand it off to BFD for preliminary
1054 analysis. Result is a newly initialized bfd *, which includes a newly
1055 malloc'd` copy of NAME (tilde-expanded and made absolute).
1056 In case of trouble, error() is called. */
1059 symfile_bfd_open (char *name
)
1063 char *absolute_name
;
1067 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy */
1069 /* Look down path for it, allocate 2nd new malloc'd copy. */
1070 desc
= openp (getenv ("PATH"), 1, name
, O_RDONLY
| O_BINARY
, 0, &absolute_name
);
1071 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1074 char *exename
= alloca (strlen (name
) + 5);
1075 strcat (strcpy (exename
, name
), ".exe");
1076 desc
= openp (getenv ("PATH"), 1, exename
, O_RDONLY
| O_BINARY
,
1082 make_cleanup (xfree
, name
);
1083 perror_with_name (name
);
1085 xfree (name
); /* Free 1st new malloc'd copy */
1086 name
= absolute_name
; /* Keep 2nd malloc'd copy in bfd */
1087 /* It'll be freed in free_objfile(). */
1089 sym_bfd
= bfd_fdopenr (name
, gnutarget
, desc
);
1093 make_cleanup (xfree
, name
);
1094 error ("\"%s\": can't open to read symbols: %s.", name
,
1095 bfd_errmsg (bfd_get_error ()));
1097 sym_bfd
->cacheable
= true;
1099 if (!bfd_check_format (sym_bfd
, bfd_object
))
1101 /* FIXME: should be checking for errors from bfd_close (for one thing,
1102 on error it does not free all the storage associated with the
1104 bfd_close (sym_bfd
); /* This also closes desc */
1105 make_cleanup (xfree
, name
);
1106 error ("\"%s\": can't read symbols: %s.", name
,
1107 bfd_errmsg (bfd_get_error ()));
1112 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1113 startup by the _initialize routine in each object file format reader,
1114 to register information about each format the the reader is prepared
1118 add_symtab_fns (struct sym_fns
*sf
)
1120 sf
->next
= symtab_fns
;
1125 /* Initialize to read symbols from the symbol file sym_bfd. It either
1126 returns or calls error(). The result is an initialized struct sym_fns
1127 in the objfile structure, that contains cached information about the
1131 find_sym_fns (struct objfile
*objfile
)
1134 enum bfd_flavour our_flavour
= bfd_get_flavour (objfile
->obfd
);
1135 char *our_target
= bfd_get_target (objfile
->obfd
);
1137 /* Special kludge for apollo. See dstread.c. */
1138 if (STREQN (our_target
, "apollo", 6))
1139 our_flavour
= (enum bfd_flavour
) -2;
1141 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
->next
)
1143 if (our_flavour
== sf
->sym_flavour
)
1149 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
1150 bfd_get_target (objfile
->obfd
));
1153 /* This function runs the load command of our current target. */
1156 load_command (char *arg
, int from_tty
)
1159 arg
= get_exec_file (1);
1160 target_load (arg
, from_tty
);
1163 /* This version of "load" should be usable for any target. Currently
1164 it is just used for remote targets, not inftarg.c or core files,
1165 on the theory that only in that case is it useful.
1167 Avoiding xmodem and the like seems like a win (a) because we don't have
1168 to worry about finding it, and (b) On VMS, fork() is very slow and so
1169 we don't want to run a subprocess. On the other hand, I'm not sure how
1170 performance compares. */
1172 static int download_write_size
= 512;
1173 static int validate_download
= 0;
1176 generic_load (char *args
, int from_tty
)
1180 time_t start_time
, end_time
; /* Start and end times of download */
1181 unsigned long data_count
= 0; /* Number of bytes transferred to memory */
1182 unsigned long write_count
= 0; /* Number of writes needed. */
1183 unsigned long load_offset
; /* offset to add to vma for each section */
1185 struct cleanup
*old_cleanups
;
1187 CORE_ADDR total_size
= 0;
1188 CORE_ADDR total_sent
= 0;
1190 /* Parse the input argument - the user can specify a load offset as
1191 a second argument. */
1192 filename
= xmalloc (strlen (args
) + 1);
1193 old_cleanups
= make_cleanup (xfree
, filename
);
1194 strcpy (filename
, args
);
1195 offptr
= strchr (filename
, ' ');
1199 load_offset
= strtoul (offptr
, &endptr
, 0);
1200 if (offptr
== endptr
)
1201 error ("Invalid download offset:%s\n", offptr
);
1207 /* Open the file for loading. */
1208 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
1209 if (loadfile_bfd
== NULL
)
1211 perror_with_name (filename
);
1215 /* FIXME: should be checking for errors from bfd_close (for one thing,
1216 on error it does not free all the storage associated with the
1218 make_cleanup_bfd_close (loadfile_bfd
);
1220 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
1222 error ("\"%s\" is not an object file: %s", filename
,
1223 bfd_errmsg (bfd_get_error ()));
1226 for (s
= loadfile_bfd
->sections
; s
; s
= s
->next
)
1227 if (s
->flags
& SEC_LOAD
)
1228 total_size
+= bfd_get_section_size_before_reloc (s
);
1230 start_time
= time (NULL
);
1232 for (s
= loadfile_bfd
->sections
; s
; s
= s
->next
)
1234 if (s
->flags
& SEC_LOAD
)
1236 CORE_ADDR size
= bfd_get_section_size_before_reloc (s
);
1240 struct cleanup
*old_chain
;
1241 CORE_ADDR lma
= s
->lma
+ load_offset
;
1242 CORE_ADDR block_size
;
1244 const char *sect_name
= bfd_get_section_name (loadfile_bfd
, s
);
1247 if (download_write_size
> 0 && size
> download_write_size
)
1248 block_size
= download_write_size
;
1252 buffer
= xmalloc (size
);
1253 old_chain
= make_cleanup (xfree
, buffer
);
1255 /* Is this really necessary? I guess it gives the user something
1256 to look at during a long download. */
1258 ui_out_message (uiout
, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1259 sect_name
, paddr_nz (size
), paddr_nz (lma
));
1261 fprintf_unfiltered (gdb_stdout
,
1262 "Loading section %s, size 0x%s lma 0x%s\n",
1263 sect_name
, paddr_nz (size
), paddr_nz (lma
));
1266 bfd_get_section_contents (loadfile_bfd
, s
, buffer
, 0, size
);
1272 CORE_ADDR this_transfer
= size
- sent
;
1273 if (this_transfer
>= block_size
)
1274 this_transfer
= block_size
;
1275 len
= target_write_memory_partial (lma
, buffer
,
1276 this_transfer
, &err
);
1279 if (validate_download
)
1281 /* Broken memories and broken monitors manifest
1282 themselves here when bring new computers to
1283 life. This doubles already slow downloads. */
1284 /* NOTE: cagney/1999-10-18: A more efficient
1285 implementation might add a verify_memory()
1286 method to the target vector and then use
1287 that. remote.c could implement that method
1288 using the ``qCRC'' packet. */
1289 char *check
= xmalloc (len
);
1290 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
1291 if (target_read_memory (lma
, check
, len
) != 0)
1292 error ("Download verify read failed at 0x%s",
1294 if (memcmp (buffer
, check
, len
) != 0)
1295 error ("Download verify compare failed at 0x%s",
1297 do_cleanups (verify_cleanups
);
1306 || (ui_load_progress_hook
!= NULL
1307 && ui_load_progress_hook (sect_name
, sent
)))
1308 error ("Canceled the download");
1310 if (show_load_progress
!= NULL
)
1311 show_load_progress (sect_name
, sent
, size
, total_sent
, total_size
);
1313 while (sent
< size
);
1316 error ("Memory access error while loading section %s.", sect_name
);
1318 do_cleanups (old_chain
);
1323 end_time
= time (NULL
);
1326 entry
= bfd_get_start_address (loadfile_bfd
);
1328 ui_out_text (uiout
, "Start address ");
1329 ui_out_field_fmt (uiout
, "address", "0x%s" , paddr_nz (entry
));
1330 ui_out_text (uiout
, ", load size ");
1331 ui_out_field_fmt (uiout
, "load-size", "%ld" , data_count
);
1332 ui_out_text (uiout
, "\n");
1335 fprintf_unfiltered (gdb_stdout
,
1336 "Start address 0x%s , load size %ld\n",
1337 paddr_nz (entry
), data_count
);
1339 /* We were doing this in remote-mips.c, I suspect it is right
1340 for other targets too. */
1344 /* FIXME: are we supposed to call symbol_file_add or not? According to
1345 a comment from remote-mips.c (where a call to symbol_file_add was
1346 commented out), making the call confuses GDB if more than one file is
1347 loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c
1350 print_transfer_performance (gdb_stdout
, data_count
, write_count
,
1351 end_time
- start_time
);
1353 do_cleanups (old_cleanups
);
1356 /* Report how fast the transfer went. */
1358 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1359 replaced by print_transfer_performance (with a very different
1360 function signature). */
1363 report_transfer_performance (unsigned long data_count
, time_t start_time
,
1366 print_transfer_performance (gdb_stdout
, data_count
, end_time
- start_time
, 0);
1370 print_transfer_performance (struct ui_file
*stream
,
1371 unsigned long data_count
,
1372 unsigned long write_count
,
1373 unsigned long time_count
)
1376 ui_out_text (uiout
, "Transfer rate: ");
1379 ui_out_field_fmt (uiout
, "transfer-rate", "%ld",
1380 (data_count
* 8) / time_count
);
1381 ui_out_text (uiout
, " bits/sec");
1385 ui_out_field_fmt (uiout
, "transferred-bits", "%ld", (data_count
* 8));
1386 ui_out_text (uiout
, " bits in <1 sec");
1388 if (write_count
> 0)
1390 ui_out_text (uiout
, ", ");
1391 ui_out_field_fmt (uiout
, "write-rate", "%ld", data_count
/ write_count
);
1392 ui_out_text (uiout
, " bytes/write");
1394 ui_out_text (uiout
, ".\n");
1396 fprintf_unfiltered (stream
, "Transfer rate: ");
1398 fprintf_unfiltered (stream
, "%ld bits/sec", (data_count
* 8) / time_count
);
1400 fprintf_unfiltered (stream
, "%ld bits in <1 sec", (data_count
* 8));
1401 if (write_count
> 0)
1402 fprintf_unfiltered (stream
, ", %ld bytes/write", data_count
/ write_count
);
1403 fprintf_unfiltered (stream
, ".\n");
1407 /* This function allows the addition of incrementally linked object files.
1408 It does not modify any state in the target, only in the debugger. */
1409 /* Note: ezannoni 2000-04-13 This function/command used to have a
1410 special case syntax for the rombug target (Rombug is the boot
1411 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
1412 rombug case, the user doesn't need to supply a text address,
1413 instead a call to target_link() (in target.c) would supply the
1414 value to use. We are now discontinuing this type of ad hoc syntax. */
1418 add_symbol_file_command (char *args
, int from_tty
)
1420 char *filename
= NULL
;
1421 int flags
= OBJF_USERLOADED
;
1423 int expecting_option
= 0;
1424 int section_index
= 0;
1428 int expecting_sec_name
= 0;
1429 int expecting_sec_addr
= 0;
1435 } sect_opts
[SECT_OFF_MAX
];
1437 struct section_addr_info section_addrs
;
1438 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
1443 error ("add-symbol-file takes a file name and an address");
1445 /* Make a copy of the string that we can safely write into. */
1446 args
= xstrdup (args
);
1448 /* Ensure section_addrs is initialized */
1449 memset (§ion_addrs
, 0, sizeof (section_addrs
));
1451 while (*args
!= '\000')
1453 /* Any leading spaces? */
1454 while (isspace (*args
))
1457 /* Point arg to the beginning of the argument. */
1460 /* Move args pointer over the argument. */
1461 while ((*args
!= '\000') && !isspace (*args
))
1464 /* If there are more arguments, terminate arg and
1466 if (*args
!= '\000')
1469 /* Now process the argument. */
1472 /* The first argument is the file name. */
1473 filename
= tilde_expand (arg
);
1474 make_cleanup (xfree
, filename
);
1479 /* The second argument is always the text address at which
1480 to load the program. */
1481 sect_opts
[section_index
].name
= ".text";
1482 sect_opts
[section_index
].value
= arg
;
1487 /* It's an option (starting with '-') or it's an argument
1492 if (strcmp (arg
, "-mapped") == 0)
1493 flags
|= OBJF_MAPPED
;
1495 if (strcmp (arg
, "-readnow") == 0)
1496 flags
|= OBJF_READNOW
;
1498 if (strcmp (arg
, "-s") == 0)
1500 if (section_index
>= SECT_OFF_MAX
)
1501 error ("Too many sections specified.");
1502 expecting_sec_name
= 1;
1503 expecting_sec_addr
= 1;
1508 if (expecting_sec_name
)
1510 sect_opts
[section_index
].name
= arg
;
1511 expecting_sec_name
= 0;
1514 if (expecting_sec_addr
)
1516 sect_opts
[section_index
].value
= arg
;
1517 expecting_sec_addr
= 0;
1521 error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*");
1527 /* Print the prompt for the query below. And save the arguments into
1528 a sect_addr_info structure to be passed around to other
1529 functions. We have to split this up into separate print
1530 statements because local_hex_string returns a local static
1533 printf_filtered ("add symbol table from file \"%s\" at\n", filename
);
1534 for (i
= 0; i
< section_index
; i
++)
1537 char *val
= sect_opts
[i
].value
;
1538 char *sec
= sect_opts
[i
].name
;
1540 val
= sect_opts
[i
].value
;
1541 if (val
[0] == '0' && val
[1] == 'x')
1542 addr
= strtoul (val
+2, NULL
, 16);
1544 addr
= strtoul (val
, NULL
, 10);
1546 /* Here we store the section offsets in the order they were
1547 entered on the command line. */
1548 section_addrs
.other
[sec_num
].name
= sec
;
1549 section_addrs
.other
[sec_num
].addr
= addr
;
1550 printf_filtered ("\t%s_addr = %s\n",
1552 local_hex_string ((unsigned long)addr
));
1555 /* The object's sections are initialized when a
1556 call is made to build_objfile_section_table (objfile).
1557 This happens in reread_symbols.
1558 At this point, we don't know what file type this is,
1559 so we can't determine what section names are valid. */
1562 if (from_tty
&& (!query ("%s", "")))
1563 error ("Not confirmed.");
1565 symbol_file_add (filename
, from_tty
, §ion_addrs
, 0, flags
);
1567 /* Getting new symbols may change our opinion about what is
1569 reinit_frame_cache ();
1570 do_cleanups (my_cleanups
);
1574 add_shared_symbol_files_command (char *args
, int from_tty
)
1576 #ifdef ADD_SHARED_SYMBOL_FILES
1577 ADD_SHARED_SYMBOL_FILES (args
, from_tty
);
1579 error ("This command is not available in this configuration of GDB.");
1583 /* Re-read symbols if a symbol-file has changed. */
1585 reread_symbols (void)
1587 struct objfile
*objfile
;
1590 struct stat new_statbuf
;
1593 /* With the addition of shared libraries, this should be modified,
1594 the load time should be saved in the partial symbol tables, since
1595 different tables may come from different source files. FIXME.
1596 This routine should then walk down each partial symbol table
1597 and see if the symbol table that it originates from has been changed */
1599 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
1603 #ifdef IBM6000_TARGET
1604 /* If this object is from a shared library, then you should
1605 stat on the library name, not member name. */
1607 if (objfile
->obfd
->my_archive
)
1608 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
1611 res
= stat (objfile
->name
, &new_statbuf
);
1614 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1615 printf_filtered ("`%s' has disappeared; keeping its symbols.\n",
1619 new_modtime
= new_statbuf
.st_mtime
;
1620 if (new_modtime
!= objfile
->mtime
)
1622 struct cleanup
*old_cleanups
;
1623 struct section_offsets
*offsets
;
1625 char *obfd_filename
;
1627 printf_filtered ("`%s' has changed; re-reading symbols.\n",
1630 /* There are various functions like symbol_file_add,
1631 symfile_bfd_open, syms_from_objfile, etc., which might
1632 appear to do what we want. But they have various other
1633 effects which we *don't* want. So we just do stuff
1634 ourselves. We don't worry about mapped files (for one thing,
1635 any mapped file will be out of date). */
1637 /* If we get an error, blow away this objfile (not sure if
1638 that is the correct response for things like shared
1640 old_cleanups
= make_cleanup_free_objfile (objfile
);
1641 /* We need to do this whenever any symbols go away. */
1642 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
1644 /* Clean up any state BFD has sitting around. We don't need
1645 to close the descriptor but BFD lacks a way of closing the
1646 BFD without closing the descriptor. */
1647 obfd_filename
= bfd_get_filename (objfile
->obfd
);
1648 if (!bfd_close (objfile
->obfd
))
1649 error ("Can't close BFD for %s: %s", objfile
->name
,
1650 bfd_errmsg (bfd_get_error ()));
1651 objfile
->obfd
= bfd_openr (obfd_filename
, gnutarget
);
1652 if (objfile
->obfd
== NULL
)
1653 error ("Can't open %s to read symbols.", objfile
->name
);
1654 /* bfd_openr sets cacheable to true, which is what we want. */
1655 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
1656 error ("Can't read symbols from %s: %s.", objfile
->name
,
1657 bfd_errmsg (bfd_get_error ()));
1659 /* Save the offsets, we will nuke them with the rest of the
1661 num_offsets
= objfile
->num_sections
;
1662 offsets
= (struct section_offsets
*) alloca (SIZEOF_SECTION_OFFSETS
);
1663 memcpy (offsets
, objfile
->section_offsets
, SIZEOF_SECTION_OFFSETS
);
1665 /* Nuke all the state that we will re-read. Much of the following
1666 code which sets things to NULL really is necessary to tell
1667 other parts of GDB that there is nothing currently there. */
1669 /* FIXME: Do we have to free a whole linked list, or is this
1671 if (objfile
->global_psymbols
.list
)
1672 mfree (objfile
->md
, objfile
->global_psymbols
.list
);
1673 memset (&objfile
->global_psymbols
, 0,
1674 sizeof (objfile
->global_psymbols
));
1675 if (objfile
->static_psymbols
.list
)
1676 mfree (objfile
->md
, objfile
->static_psymbols
.list
);
1677 memset (&objfile
->static_psymbols
, 0,
1678 sizeof (objfile
->static_psymbols
));
1680 /* Free the obstacks for non-reusable objfiles */
1681 free_bcache (&objfile
->psymbol_cache
);
1682 obstack_free (&objfile
->psymbol_obstack
, 0);
1683 obstack_free (&objfile
->symbol_obstack
, 0);
1684 obstack_free (&objfile
->type_obstack
, 0);
1685 objfile
->sections
= NULL
;
1686 objfile
->symtabs
= NULL
;
1687 objfile
->psymtabs
= NULL
;
1688 objfile
->free_psymtabs
= NULL
;
1689 objfile
->msymbols
= NULL
;
1690 objfile
->minimal_symbol_count
= 0;
1691 memset (&objfile
->msymbol_hash
, 0,
1692 sizeof (objfile
->msymbol_hash
));
1693 memset (&objfile
->msymbol_demangled_hash
, 0,
1694 sizeof (objfile
->msymbol_demangled_hash
));
1695 objfile
->fundamental_types
= NULL
;
1696 if (objfile
->sf
!= NULL
)
1698 (*objfile
->sf
->sym_finish
) (objfile
);
1701 /* We never make this a mapped file. */
1703 /* obstack_specify_allocation also initializes the obstack so
1705 obstack_specify_allocation (&objfile
->psymbol_cache
.cache
, 0, 0,
1707 obstack_specify_allocation (&objfile
->psymbol_obstack
, 0, 0,
1709 obstack_specify_allocation (&objfile
->symbol_obstack
, 0, 0,
1711 obstack_specify_allocation (&objfile
->type_obstack
, 0, 0,
1713 if (build_objfile_section_table (objfile
))
1715 error ("Can't find the file sections in `%s': %s",
1716 objfile
->name
, bfd_errmsg (bfd_get_error ()));
1719 /* We use the same section offsets as from last time. I'm not
1720 sure whether that is always correct for shared libraries. */
1721 objfile
->section_offsets
= (struct section_offsets
*)
1722 obstack_alloc (&objfile
->psymbol_obstack
, SIZEOF_SECTION_OFFSETS
);
1723 memcpy (objfile
->section_offsets
, offsets
, SIZEOF_SECTION_OFFSETS
);
1724 objfile
->num_sections
= num_offsets
;
1726 /* What the hell is sym_new_init for, anyway? The concept of
1727 distinguishing between the main file and additional files
1728 in this way seems rather dubious. */
1729 if (objfile
== symfile_objfile
)
1731 (*objfile
->sf
->sym_new_init
) (objfile
);
1733 RESET_HP_UX_GLOBALS ();
1737 (*objfile
->sf
->sym_init
) (objfile
);
1738 clear_complaints (1, 1);
1739 /* The "mainline" parameter is a hideous hack; I think leaving it
1740 zero is OK since dbxread.c also does what it needs to do if
1741 objfile->global_psymbols.size is 0. */
1742 (*objfile
->sf
->sym_read
) (objfile
, 0);
1743 if (!have_partial_symbols () && !have_full_symbols ())
1746 printf_filtered ("(no debugging symbols found)\n");
1749 objfile
->flags
|= OBJF_SYMS
;
1751 /* We're done reading the symbol file; finish off complaints. */
1752 clear_complaints (0, 1);
1754 /* Getting new symbols may change our opinion about what is
1757 reinit_frame_cache ();
1759 /* Discard cleanups as symbol reading was successful. */
1760 discard_cleanups (old_cleanups
);
1762 /* If the mtime has changed between the time we set new_modtime
1763 and now, we *want* this to be out of date, so don't call stat
1765 objfile
->mtime
= new_modtime
;
1768 /* Call this after reading in a new symbol table to give target
1769 dependent code a crack at the new symbols. For instance, this
1770 could be used to update the values of target-specific symbols GDB
1771 needs to keep track of (such as _sigtramp, or whatever). */
1773 TARGET_SYMFILE_POSTREAD (objfile
);
1779 clear_symtab_users ();
1791 static filename_language
*filename_language_table
;
1792 static int fl_table_size
, fl_table_next
;
1795 add_filename_language (char *ext
, enum language lang
)
1797 if (fl_table_next
>= fl_table_size
)
1799 fl_table_size
+= 10;
1800 filename_language_table
= xrealloc (filename_language_table
,
1804 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
1805 filename_language_table
[fl_table_next
].lang
= lang
;
1809 static char *ext_args
;
1812 set_ext_lang_command (char *args
, int from_tty
)
1815 char *cp
= ext_args
;
1818 /* First arg is filename extension, starting with '.' */
1820 error ("'%s': Filename extension must begin with '.'", ext_args
);
1822 /* Find end of first arg. */
1823 while (*cp
&& !isspace (*cp
))
1827 error ("'%s': two arguments required -- filename extension and language",
1830 /* Null-terminate first arg */
1833 /* Find beginning of second arg, which should be a source language. */
1834 while (*cp
&& isspace (*cp
))
1838 error ("'%s': two arguments required -- filename extension and language",
1841 /* Lookup the language from among those we know. */
1842 lang
= language_enum (cp
);
1844 /* Now lookup the filename extension: do we already know it? */
1845 for (i
= 0; i
< fl_table_next
; i
++)
1846 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
1849 if (i
>= fl_table_next
)
1851 /* new file extension */
1852 add_filename_language (ext_args
, lang
);
1856 /* redefining a previously known filename extension */
1859 /* query ("Really make files of type %s '%s'?", */
1860 /* ext_args, language_str (lang)); */
1862 xfree (filename_language_table
[i
].ext
);
1863 filename_language_table
[i
].ext
= xstrdup (ext_args
);
1864 filename_language_table
[i
].lang
= lang
;
1869 info_ext_lang_command (char *args
, int from_tty
)
1873 printf_filtered ("Filename extensions and the languages they represent:");
1874 printf_filtered ("\n\n");
1875 for (i
= 0; i
< fl_table_next
; i
++)
1876 printf_filtered ("\t%s\t- %s\n",
1877 filename_language_table
[i
].ext
,
1878 language_str (filename_language_table
[i
].lang
));
1882 init_filename_language_table (void)
1884 if (fl_table_size
== 0) /* protect against repetition */
1888 filename_language_table
=
1889 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
1890 add_filename_language (".c", language_c
);
1891 add_filename_language (".C", language_cplus
);
1892 add_filename_language (".cc", language_cplus
);
1893 add_filename_language (".cp", language_cplus
);
1894 add_filename_language (".cpp", language_cplus
);
1895 add_filename_language (".cxx", language_cplus
);
1896 add_filename_language (".c++", language_cplus
);
1897 add_filename_language (".java", language_java
);
1898 add_filename_language (".class", language_java
);
1899 add_filename_language (".ch", language_chill
);
1900 add_filename_language (".c186", language_chill
);
1901 add_filename_language (".c286", language_chill
);
1902 add_filename_language (".f", language_fortran
);
1903 add_filename_language (".F", language_fortran
);
1904 add_filename_language (".s", language_asm
);
1905 add_filename_language (".S", language_asm
);
1906 add_filename_language (".pas", language_pascal
);
1907 add_filename_language (".p", language_pascal
);
1908 add_filename_language (".pp", language_pascal
);
1913 deduce_language_from_filename (char *filename
)
1918 if (filename
!= NULL
)
1919 if ((cp
= strrchr (filename
, '.')) != NULL
)
1920 for (i
= 0; i
< fl_table_next
; i
++)
1921 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
1922 return filename_language_table
[i
].lang
;
1924 return language_unknown
;
1929 Allocate and partly initialize a new symbol table. Return a pointer
1930 to it. error() if no space.
1932 Caller must set these fields:
1938 possibly free_named_symtabs (symtab->filename);
1942 allocate_symtab (char *filename
, struct objfile
*objfile
)
1944 register struct symtab
*symtab
;
1946 symtab
= (struct symtab
*)
1947 obstack_alloc (&objfile
->symbol_obstack
, sizeof (struct symtab
));
1948 memset (symtab
, 0, sizeof (*symtab
));
1949 symtab
->filename
= obsavestring (filename
, strlen (filename
),
1950 &objfile
->symbol_obstack
);
1951 symtab
->fullname
= NULL
;
1952 symtab
->language
= deduce_language_from_filename (filename
);
1953 symtab
->debugformat
= obsavestring ("unknown", 7,
1954 &objfile
->symbol_obstack
);
1956 /* Hook it to the objfile it comes from */
1958 symtab
->objfile
= objfile
;
1959 symtab
->next
= objfile
->symtabs
;
1960 objfile
->symtabs
= symtab
;
1962 /* FIXME: This should go away. It is only defined for the Z8000,
1963 and the Z8000 definition of this macro doesn't have anything to
1964 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
1965 here for convenience. */
1966 #ifdef INIT_EXTRA_SYMTAB_INFO
1967 INIT_EXTRA_SYMTAB_INFO (symtab
);
1973 struct partial_symtab
*
1974 allocate_psymtab (char *filename
, struct objfile
*objfile
)
1976 struct partial_symtab
*psymtab
;
1978 if (objfile
->free_psymtabs
)
1980 psymtab
= objfile
->free_psymtabs
;
1981 objfile
->free_psymtabs
= psymtab
->next
;
1984 psymtab
= (struct partial_symtab
*)
1985 obstack_alloc (&objfile
->psymbol_obstack
,
1986 sizeof (struct partial_symtab
));
1988 memset (psymtab
, 0, sizeof (struct partial_symtab
));
1989 psymtab
->filename
= obsavestring (filename
, strlen (filename
),
1990 &objfile
->psymbol_obstack
);
1991 psymtab
->symtab
= NULL
;
1993 /* Prepend it to the psymtab list for the objfile it belongs to.
1994 Psymtabs are searched in most recent inserted -> least recent
1997 psymtab
->objfile
= objfile
;
1998 psymtab
->next
= objfile
->psymtabs
;
1999 objfile
->psymtabs
= psymtab
;
2002 struct partial_symtab
**prev_pst
;
2003 psymtab
->objfile
= objfile
;
2004 psymtab
->next
= NULL
;
2005 prev_pst
= &(objfile
->psymtabs
);
2006 while ((*prev_pst
) != NULL
)
2007 prev_pst
= &((*prev_pst
)->next
);
2008 (*prev_pst
) = psymtab
;
2016 discard_psymtab (struct partial_symtab
*pst
)
2018 struct partial_symtab
**prev_pst
;
2021 Empty psymtabs happen as a result of header files which don't
2022 have any symbols in them. There can be a lot of them. But this
2023 check is wrong, in that a psymtab with N_SLINE entries but
2024 nothing else is not empty, but we don't realize that. Fixing
2025 that without slowing things down might be tricky. */
2027 /* First, snip it out of the psymtab chain */
2029 prev_pst
= &(pst
->objfile
->psymtabs
);
2030 while ((*prev_pst
) != pst
)
2031 prev_pst
= &((*prev_pst
)->next
);
2032 (*prev_pst
) = pst
->next
;
2034 /* Next, put it on a free list for recycling */
2036 pst
->next
= pst
->objfile
->free_psymtabs
;
2037 pst
->objfile
->free_psymtabs
= pst
;
2041 /* Reset all data structures in gdb which may contain references to symbol
2045 clear_symtab_users (void)
2047 /* Someday, we should do better than this, by only blowing away
2048 the things that really need to be blown. */
2049 clear_value_history ();
2051 clear_internalvars ();
2052 breakpoint_re_set ();
2053 set_default_breakpoint (0, 0, 0, 0);
2054 current_source_symtab
= 0;
2055 current_source_line
= 0;
2056 clear_pc_function_cache ();
2057 if (target_new_objfile_hook
)
2058 target_new_objfile_hook (NULL
);
2062 clear_symtab_users_cleanup (void *ignore
)
2064 clear_symtab_users ();
2067 /* clear_symtab_users_once:
2069 This function is run after symbol reading, or from a cleanup.
2070 If an old symbol table was obsoleted, the old symbol table
2071 has been blown away, but the other GDB data structures that may
2072 reference it have not yet been cleared or re-directed. (The old
2073 symtab was zapped, and the cleanup queued, in free_named_symtab()
2076 This function can be queued N times as a cleanup, or called
2077 directly; it will do all the work the first time, and then will be a
2078 no-op until the next time it is queued. This works by bumping a
2079 counter at queueing time. Much later when the cleanup is run, or at
2080 the end of symbol processing (in case the cleanup is discarded), if
2081 the queued count is greater than the "done-count", we do the work
2082 and set the done-count to the queued count. If the queued count is
2083 less than or equal to the done-count, we just ignore the call. This
2084 is needed because reading a single .o file will often replace many
2085 symtabs (one per .h file, for example), and we don't want to reset
2086 the breakpoints N times in the user's face.
2088 The reason we both queue a cleanup, and call it directly after symbol
2089 reading, is because the cleanup protects us in case of errors, but is
2090 discarded if symbol reading is successful. */
2093 /* FIXME: As free_named_symtabs is currently a big noop this function
2094 is no longer needed. */
2095 static void clear_symtab_users_once (void);
2097 static int clear_symtab_users_queued
;
2098 static int clear_symtab_users_done
;
2101 clear_symtab_users_once (void)
2103 /* Enforce once-per-`do_cleanups'-semantics */
2104 if (clear_symtab_users_queued
<= clear_symtab_users_done
)
2106 clear_symtab_users_done
= clear_symtab_users_queued
;
2108 clear_symtab_users ();
2112 /* Delete the specified psymtab, and any others that reference it. */
2115 cashier_psymtab (struct partial_symtab
*pst
)
2117 struct partial_symtab
*ps
, *pprev
= NULL
;
2120 /* Find its previous psymtab in the chain */
2121 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2130 /* Unhook it from the chain. */
2131 if (ps
== pst
->objfile
->psymtabs
)
2132 pst
->objfile
->psymtabs
= ps
->next
;
2134 pprev
->next
= ps
->next
;
2136 /* FIXME, we can't conveniently deallocate the entries in the
2137 partial_symbol lists (global_psymbols/static_psymbols) that
2138 this psymtab points to. These just take up space until all
2139 the psymtabs are reclaimed. Ditto the dependencies list and
2140 filename, which are all in the psymbol_obstack. */
2142 /* We need to cashier any psymtab that has this one as a dependency... */
2144 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2146 for (i
= 0; i
< ps
->number_of_dependencies
; i
++)
2148 if (ps
->dependencies
[i
] == pst
)
2150 cashier_psymtab (ps
);
2151 goto again
; /* Must restart, chain has been munged. */
2158 /* If a symtab or psymtab for filename NAME is found, free it along
2159 with any dependent breakpoints, displays, etc.
2160 Used when loading new versions of object modules with the "add-file"
2161 command. This is only called on the top-level symtab or psymtab's name;
2162 it is not called for subsidiary files such as .h files.
2164 Return value is 1 if we blew away the environment, 0 if not.
2165 FIXME. The return value appears to never be used.
2167 FIXME. I think this is not the best way to do this. We should
2168 work on being gentler to the environment while still cleaning up
2169 all stray pointers into the freed symtab. */
2172 free_named_symtabs (char *name
)
2175 /* FIXME: With the new method of each objfile having it's own
2176 psymtab list, this function needs serious rethinking. In particular,
2177 why was it ever necessary to toss psymtabs with specific compilation
2178 unit filenames, as opposed to all psymtabs from a particular symbol
2180 Well, the answer is that some systems permit reloading of particular
2181 compilation units. We want to blow away any old info about these
2182 compilation units, regardless of which objfiles they arrived in. --gnu. */
2184 register struct symtab
*s
;
2185 register struct symtab
*prev
;
2186 register struct partial_symtab
*ps
;
2187 struct blockvector
*bv
;
2190 /* We only wack things if the symbol-reload switch is set. */
2191 if (!symbol_reloading
)
2194 /* Some symbol formats have trouble providing file names... */
2195 if (name
== 0 || *name
== '\0')
2198 /* Look for a psymtab with the specified name. */
2201 for (ps
= partial_symtab_list
; ps
; ps
= ps
->next
)
2203 if (STREQ (name
, ps
->filename
))
2205 cashier_psymtab (ps
); /* Blow it away...and its little dog, too. */
2206 goto again2
; /* Must restart, chain has been munged */
2210 /* Look for a symtab with the specified name. */
2212 for (s
= symtab_list
; s
; s
= s
->next
)
2214 if (STREQ (name
, s
->filename
))
2221 if (s
== symtab_list
)
2222 symtab_list
= s
->next
;
2224 prev
->next
= s
->next
;
2226 /* For now, queue a delete for all breakpoints, displays, etc., whether
2227 or not they depend on the symtab being freed. This should be
2228 changed so that only those data structures affected are deleted. */
2230 /* But don't delete anything if the symtab is empty.
2231 This test is necessary due to a bug in "dbxread.c" that
2232 causes empty symtabs to be created for N_SO symbols that
2233 contain the pathname of the object file. (This problem
2234 has been fixed in GDB 3.9x). */
2236 bv
= BLOCKVECTOR (s
);
2237 if (BLOCKVECTOR_NBLOCKS (bv
) > 2
2238 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
))
2239 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)))
2241 complain (&oldsyms_complaint
, name
);
2243 clear_symtab_users_queued
++;
2244 make_cleanup (clear_symtab_users_once
, 0);
2249 complain (&empty_symtab_complaint
, name
);
2256 /* It is still possible that some breakpoints will be affected
2257 even though no symtab was found, since the file might have
2258 been compiled without debugging, and hence not be associated
2259 with a symtab. In order to handle this correctly, we would need
2260 to keep a list of text address ranges for undebuggable files.
2261 For now, we do nothing, since this is a fairly obscure case. */
2265 /* FIXME, what about the minimal symbol table? */
2272 /* Allocate and partially fill a partial symtab. It will be
2273 completely filled at the end of the symbol list.
2275 FILENAME is the name of the symbol-file we are reading from. */
2277 struct partial_symtab
*
2278 start_psymtab_common (struct objfile
*objfile
,
2279 struct section_offsets
*section_offsets
, char *filename
,
2280 CORE_ADDR textlow
, struct partial_symbol
**global_syms
,
2281 struct partial_symbol
**static_syms
)
2283 struct partial_symtab
*psymtab
;
2285 psymtab
= allocate_psymtab (filename
, objfile
);
2286 psymtab
->section_offsets
= section_offsets
;
2287 psymtab
->textlow
= textlow
;
2288 psymtab
->texthigh
= psymtab
->textlow
; /* default */
2289 psymtab
->globals_offset
= global_syms
- objfile
->global_psymbols
.list
;
2290 psymtab
->statics_offset
= static_syms
- objfile
->static_psymbols
.list
;
2294 /* Add a symbol with a long value to a psymtab.
2295 Since one arg is a struct, we pass in a ptr and deref it (sigh). */
2298 add_psymbol_to_list (char *name
, int namelength
, namespace_enum
namespace,
2299 enum address_class
class,
2300 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2301 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2302 enum language language
, struct objfile
*objfile
)
2304 register struct partial_symbol
*psym
;
2305 char *buf
= alloca (namelength
+ 1);
2306 /* psymbol is static so that there will be no uninitialized gaps in the
2307 structure which might contain random data, causing cache misses in
2309 static struct partial_symbol psymbol
;
2311 /* Create local copy of the partial symbol */
2312 memcpy (buf
, name
, namelength
);
2313 buf
[namelength
] = '\0';
2314 SYMBOL_NAME (&psymbol
) = bcache (buf
, namelength
+ 1, &objfile
->psymbol_cache
);
2315 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2318 SYMBOL_VALUE (&psymbol
) = val
;
2322 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2324 SYMBOL_SECTION (&psymbol
) = 0;
2325 SYMBOL_LANGUAGE (&psymbol
) = language
;
2326 PSYMBOL_NAMESPACE (&psymbol
) = namespace;
2327 PSYMBOL_CLASS (&psymbol
) = class;
2328 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2330 /* Stash the partial symbol away in the cache */
2331 psym
= bcache (&psymbol
, sizeof (struct partial_symbol
), &objfile
->psymbol_cache
);
2333 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2334 if (list
->next
>= list
->list
+ list
->size
)
2336 extend_psymbol_list (list
, objfile
);
2338 *list
->next
++ = psym
;
2339 OBJSTAT (objfile
, n_psyms
++);
2342 /* Add a symbol with a long value to a psymtab. This differs from
2343 * add_psymbol_to_list above in taking both a mangled and a demangled
2347 add_psymbol_with_dem_name_to_list (char *name
, int namelength
, char *dem_name
,
2348 int dem_namelength
, namespace_enum
namespace,
2349 enum address_class
class,
2350 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2351 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2352 enum language language
,
2353 struct objfile
*objfile
)
2355 register struct partial_symbol
*psym
;
2356 char *buf
= alloca (namelength
+ 1);
2357 /* psymbol is static so that there will be no uninitialized gaps in the
2358 structure which might contain random data, causing cache misses in
2360 static struct partial_symbol psymbol
;
2362 /* Create local copy of the partial symbol */
2364 memcpy (buf
, name
, namelength
);
2365 buf
[namelength
] = '\0';
2366 SYMBOL_NAME (&psymbol
) = bcache (buf
, namelength
+ 1, &objfile
->psymbol_cache
);
2368 buf
= alloca (dem_namelength
+ 1);
2369 memcpy (buf
, dem_name
, dem_namelength
);
2370 buf
[dem_namelength
] = '\0';
2375 case language_cplus
:
2376 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol
) =
2377 bcache (buf
, dem_namelength
+ 1, &objfile
->psymbol_cache
);
2379 case language_chill
:
2380 SYMBOL_CHILL_DEMANGLED_NAME (&psymbol
) =
2381 bcache (buf
, dem_namelength
+ 1, &objfile
->psymbol_cache
);
2383 /* FIXME What should be done for the default case? Ignoring for now. */
2386 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2389 SYMBOL_VALUE (&psymbol
) = val
;
2393 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2395 SYMBOL_SECTION (&psymbol
) = 0;
2396 SYMBOL_LANGUAGE (&psymbol
) = language
;
2397 PSYMBOL_NAMESPACE (&psymbol
) = namespace;
2398 PSYMBOL_CLASS (&psymbol
) = class;
2399 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2401 /* Stash the partial symbol away in the cache */
2402 psym
= bcache (&psymbol
, sizeof (struct partial_symbol
), &objfile
->psymbol_cache
);
2404 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2405 if (list
->next
>= list
->list
+ list
->size
)
2407 extend_psymbol_list (list
, objfile
);
2409 *list
->next
++ = psym
;
2410 OBJSTAT (objfile
, n_psyms
++);
2413 /* Initialize storage for partial symbols. */
2416 init_psymbol_list (struct objfile
*objfile
, int total_symbols
)
2418 /* Free any previously allocated psymbol lists. */
2420 if (objfile
->global_psymbols
.list
)
2422 mfree (objfile
->md
, (PTR
) objfile
->global_psymbols
.list
);
2424 if (objfile
->static_psymbols
.list
)
2426 mfree (objfile
->md
, (PTR
) objfile
->static_psymbols
.list
);
2429 /* Current best guess is that approximately a twentieth
2430 of the total symbols (in a debugging file) are global or static
2433 objfile
->global_psymbols
.size
= total_symbols
/ 10;
2434 objfile
->static_psymbols
.size
= total_symbols
/ 10;
2436 if (objfile
->global_psymbols
.size
> 0)
2438 objfile
->global_psymbols
.next
=
2439 objfile
->global_psymbols
.list
= (struct partial_symbol
**)
2440 xmmalloc (objfile
->md
, (objfile
->global_psymbols
.size
2441 * sizeof (struct partial_symbol
*)));
2443 if (objfile
->static_psymbols
.size
> 0)
2445 objfile
->static_psymbols
.next
=
2446 objfile
->static_psymbols
.list
= (struct partial_symbol
**)
2447 xmmalloc (objfile
->md
, (objfile
->static_psymbols
.size
2448 * sizeof (struct partial_symbol
*)));
2453 The following code implements an abstraction for debugging overlay sections.
2455 The target model is as follows:
2456 1) The gnu linker will permit multiple sections to be mapped into the
2457 same VMA, each with its own unique LMA (or load address).
2458 2) It is assumed that some runtime mechanism exists for mapping the
2459 sections, one by one, from the load address into the VMA address.
2460 3) This code provides a mechanism for gdb to keep track of which
2461 sections should be considered to be mapped from the VMA to the LMA.
2462 This information is used for symbol lookup, and memory read/write.
2463 For instance, if a section has been mapped then its contents
2464 should be read from the VMA, otherwise from the LMA.
2466 Two levels of debugger support for overlays are available. One is
2467 "manual", in which the debugger relies on the user to tell it which
2468 overlays are currently mapped. This level of support is
2469 implemented entirely in the core debugger, and the information about
2470 whether a section is mapped is kept in the objfile->obj_section table.
2472 The second level of support is "automatic", and is only available if
2473 the target-specific code provides functionality to read the target's
2474 overlay mapping table, and translate its contents for the debugger
2475 (by updating the mapped state information in the obj_section tables).
2477 The interface is as follows:
2479 overlay map <name> -- tell gdb to consider this section mapped
2480 overlay unmap <name> -- tell gdb to consider this section unmapped
2481 overlay list -- list the sections that GDB thinks are mapped
2482 overlay read-target -- get the target's state of what's mapped
2483 overlay off/manual/auto -- set overlay debugging state
2484 Functional interface:
2485 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2486 section, return that section.
2487 find_pc_overlay(pc): find any overlay section that contains
2488 the pc, either in its VMA or its LMA
2489 overlay_is_mapped(sect): true if overlay is marked as mapped
2490 section_is_overlay(sect): true if section's VMA != LMA
2491 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2492 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2493 overlay_mapped_address(...): map an address from section's LMA to VMA
2494 overlay_unmapped_address(...): map an address from section's VMA to LMA
2495 symbol_overlayed_address(...): Return a "current" address for symbol:
2496 either in VMA or LMA depending on whether
2497 the symbol's section is currently mapped
2500 /* Overlay debugging state: */
2502 int overlay_debugging
= 0; /* 0 == off, 1 == manual, -1 == auto */
2503 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
2505 /* Target vector for refreshing overlay mapped state */
2506 static void simple_overlay_update (struct obj_section
*);
2507 void (*target_overlay_update
) (struct obj_section
*) = simple_overlay_update
;
2509 /* Function: section_is_overlay (SECTION)
2510 Returns true if SECTION has VMA not equal to LMA, ie.
2511 SECTION is loaded at an address different from where it will "run". */
2514 section_is_overlay (asection
*section
)
2516 if (overlay_debugging
)
2517 if (section
&& section
->lma
!= 0 &&
2518 section
->vma
!= section
->lma
)
2524 /* Function: overlay_invalidate_all (void)
2525 Invalidate the mapped state of all overlay sections (mark it as stale). */
2528 overlay_invalidate_all (void)
2530 struct objfile
*objfile
;
2531 struct obj_section
*sect
;
2533 ALL_OBJSECTIONS (objfile
, sect
)
2534 if (section_is_overlay (sect
->the_bfd_section
))
2535 sect
->ovly_mapped
= -1;
2538 /* Function: overlay_is_mapped (SECTION)
2539 Returns true if section is an overlay, and is currently mapped.
2540 Private: public access is thru function section_is_mapped.
2542 Access to the ovly_mapped flag is restricted to this function, so
2543 that we can do automatic update. If the global flag
2544 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2545 overlay_invalidate_all. If the mapped state of the particular
2546 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2549 overlay_is_mapped (struct obj_section
*osect
)
2551 if (osect
== 0 || !section_is_overlay (osect
->the_bfd_section
))
2554 switch (overlay_debugging
)
2558 return 0; /* overlay debugging off */
2559 case -1: /* overlay debugging automatic */
2560 /* Unles there is a target_overlay_update function,
2561 there's really nothing useful to do here (can't really go auto) */
2562 if (target_overlay_update
)
2564 if (overlay_cache_invalid
)
2566 overlay_invalidate_all ();
2567 overlay_cache_invalid
= 0;
2569 if (osect
->ovly_mapped
== -1)
2570 (*target_overlay_update
) (osect
);
2572 /* fall thru to manual case */
2573 case 1: /* overlay debugging manual */
2574 return osect
->ovly_mapped
== 1;
2578 /* Function: section_is_mapped
2579 Returns true if section is an overlay, and is currently mapped. */
2582 section_is_mapped (asection
*section
)
2584 struct objfile
*objfile
;
2585 struct obj_section
*osect
;
2587 if (overlay_debugging
)
2588 if (section
&& section_is_overlay (section
))
2589 ALL_OBJSECTIONS (objfile
, osect
)
2590 if (osect
->the_bfd_section
== section
)
2591 return overlay_is_mapped (osect
);
2596 /* Function: pc_in_unmapped_range
2597 If PC falls into the lma range of SECTION, return true, else false. */
2600 pc_in_unmapped_range (CORE_ADDR pc
, asection
*section
)
2604 if (overlay_debugging
)
2605 if (section
&& section_is_overlay (section
))
2607 size
= bfd_get_section_size_before_reloc (section
);
2608 if (section
->lma
<= pc
&& pc
< section
->lma
+ size
)
2614 /* Function: pc_in_mapped_range
2615 If PC falls into the vma range of SECTION, return true, else false. */
2618 pc_in_mapped_range (CORE_ADDR pc
, asection
*section
)
2622 if (overlay_debugging
)
2623 if (section
&& section_is_overlay (section
))
2625 size
= bfd_get_section_size_before_reloc (section
);
2626 if (section
->vma
<= pc
&& pc
< section
->vma
+ size
)
2632 /* Function: overlay_unmapped_address (PC, SECTION)
2633 Returns the address corresponding to PC in the unmapped (load) range.
2634 May be the same as PC. */
2637 overlay_unmapped_address (CORE_ADDR pc
, asection
*section
)
2639 if (overlay_debugging
)
2640 if (section
&& section_is_overlay (section
) &&
2641 pc_in_mapped_range (pc
, section
))
2642 return pc
+ section
->lma
- section
->vma
;
2647 /* Function: overlay_mapped_address (PC, SECTION)
2648 Returns the address corresponding to PC in the mapped (runtime) range.
2649 May be the same as PC. */
2652 overlay_mapped_address (CORE_ADDR pc
, asection
*section
)
2654 if (overlay_debugging
)
2655 if (section
&& section_is_overlay (section
) &&
2656 pc_in_unmapped_range (pc
, section
))
2657 return pc
+ section
->vma
- section
->lma
;
2663 /* Function: symbol_overlayed_address
2664 Return one of two addresses (relative to the VMA or to the LMA),
2665 depending on whether the section is mapped or not. */
2668 symbol_overlayed_address (CORE_ADDR address
, asection
*section
)
2670 if (overlay_debugging
)
2672 /* If the symbol has no section, just return its regular address. */
2675 /* If the symbol's section is not an overlay, just return its address */
2676 if (!section_is_overlay (section
))
2678 /* If the symbol's section is mapped, just return its address */
2679 if (section_is_mapped (section
))
2682 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
2683 * then return its LOADED address rather than its vma address!!
2685 return overlay_unmapped_address (address
, section
);
2690 /* Function: find_pc_overlay (PC)
2691 Return the best-match overlay section for PC:
2692 If PC matches a mapped overlay section's VMA, return that section.
2693 Else if PC matches an unmapped section's VMA, return that section.
2694 Else if PC matches an unmapped section's LMA, return that section. */
2697 find_pc_overlay (CORE_ADDR pc
)
2699 struct objfile
*objfile
;
2700 struct obj_section
*osect
, *best_match
= NULL
;
2702 if (overlay_debugging
)
2703 ALL_OBJSECTIONS (objfile
, osect
)
2704 if (section_is_overlay (osect
->the_bfd_section
))
2706 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
))
2708 if (overlay_is_mapped (osect
))
2709 return osect
->the_bfd_section
;
2713 else if (pc_in_unmapped_range (pc
, osect
->the_bfd_section
))
2716 return best_match
? best_match
->the_bfd_section
: NULL
;
2719 /* Function: find_pc_mapped_section (PC)
2720 If PC falls into the VMA address range of an overlay section that is
2721 currently marked as MAPPED, return that section. Else return NULL. */
2724 find_pc_mapped_section (CORE_ADDR pc
)
2726 struct objfile
*objfile
;
2727 struct obj_section
*osect
;
2729 if (overlay_debugging
)
2730 ALL_OBJSECTIONS (objfile
, osect
)
2731 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
) &&
2732 overlay_is_mapped (osect
))
2733 return osect
->the_bfd_section
;
2738 /* Function: list_overlays_command
2739 Print a list of mapped sections and their PC ranges */
2742 list_overlays_command (char *args
, int from_tty
)
2745 struct objfile
*objfile
;
2746 struct obj_section
*osect
;
2748 if (overlay_debugging
)
2749 ALL_OBJSECTIONS (objfile
, osect
)
2750 if (overlay_is_mapped (osect
))
2756 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
2757 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
2758 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
2759 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
2761 printf_filtered ("Section %s, loaded at ", name
);
2762 print_address_numeric (lma
, 1, gdb_stdout
);
2763 puts_filtered (" - ");
2764 print_address_numeric (lma
+ size
, 1, gdb_stdout
);
2765 printf_filtered (", mapped at ");
2766 print_address_numeric (vma
, 1, gdb_stdout
);
2767 puts_filtered (" - ");
2768 print_address_numeric (vma
+ size
, 1, gdb_stdout
);
2769 puts_filtered ("\n");
2774 printf_filtered ("No sections are mapped.\n");
2777 /* Function: map_overlay_command
2778 Mark the named section as mapped (ie. residing at its VMA address). */
2781 map_overlay_command (char *args
, int from_tty
)
2783 struct objfile
*objfile
, *objfile2
;
2784 struct obj_section
*sec
, *sec2
;
2787 if (!overlay_debugging
)
2789 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
2790 the 'overlay manual' command.");
2792 if (args
== 0 || *args
== 0)
2793 error ("Argument required: name of an overlay section");
2795 /* First, find a section matching the user supplied argument */
2796 ALL_OBJSECTIONS (objfile
, sec
)
2797 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
2799 /* Now, check to see if the section is an overlay. */
2800 bfdsec
= sec
->the_bfd_section
;
2801 if (!section_is_overlay (bfdsec
))
2802 continue; /* not an overlay section */
2804 /* Mark the overlay as "mapped" */
2805 sec
->ovly_mapped
= 1;
2807 /* Next, make a pass and unmap any sections that are
2808 overlapped by this new section: */
2809 ALL_OBJSECTIONS (objfile2
, sec2
)
2810 if (sec2
->ovly_mapped
&&
2812 sec
->the_bfd_section
!= sec2
->the_bfd_section
&&
2813 (pc_in_mapped_range (sec2
->addr
, sec
->the_bfd_section
) ||
2814 pc_in_mapped_range (sec2
->endaddr
, sec
->the_bfd_section
)))
2817 printf_filtered ("Note: section %s unmapped by overlap\n",
2818 bfd_section_name (objfile
->obfd
,
2819 sec2
->the_bfd_section
));
2820 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
2824 error ("No overlay section called %s", args
);
2827 /* Function: unmap_overlay_command
2828 Mark the overlay section as unmapped
2829 (ie. resident in its LMA address range, rather than the VMA range). */
2832 unmap_overlay_command (char *args
, int from_tty
)
2834 struct objfile
*objfile
;
2835 struct obj_section
*sec
;
2837 if (!overlay_debugging
)
2839 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
2840 the 'overlay manual' command.");
2842 if (args
== 0 || *args
== 0)
2843 error ("Argument required: name of an overlay section");
2845 /* First, find a section matching the user supplied argument */
2846 ALL_OBJSECTIONS (objfile
, sec
)
2847 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
2849 if (!sec
->ovly_mapped
)
2850 error ("Section %s is not mapped", args
);
2851 sec
->ovly_mapped
= 0;
2854 error ("No overlay section called %s", args
);
2857 /* Function: overlay_auto_command
2858 A utility command to turn on overlay debugging.
2859 Possibly this should be done via a set/show command. */
2862 overlay_auto_command (char *args
, int from_tty
)
2864 overlay_debugging
= -1;
2866 printf_filtered ("Automatic overlay debugging enabled.");
2869 /* Function: overlay_manual_command
2870 A utility command to turn on overlay debugging.
2871 Possibly this should be done via a set/show command. */
2874 overlay_manual_command (char *args
, int from_tty
)
2876 overlay_debugging
= 1;
2878 printf_filtered ("Overlay debugging enabled.");
2881 /* Function: overlay_off_command
2882 A utility command to turn on overlay debugging.
2883 Possibly this should be done via a set/show command. */
2886 overlay_off_command (char *args
, int from_tty
)
2888 overlay_debugging
= 0;
2890 printf_filtered ("Overlay debugging disabled.");
2894 overlay_load_command (char *args
, int from_tty
)
2896 if (target_overlay_update
)
2897 (*target_overlay_update
) (NULL
);
2899 error ("This target does not know how to read its overlay state.");
2902 /* Function: overlay_command
2903 A place-holder for a mis-typed command */
2905 /* Command list chain containing all defined "overlay" subcommands. */
2906 struct cmd_list_element
*overlaylist
;
2909 overlay_command (char *args
, int from_tty
)
2912 ("\"overlay\" must be followed by the name of an overlay command.\n");
2913 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
2917 /* Target Overlays for the "Simplest" overlay manager:
2919 This is GDB's default target overlay layer. It works with the
2920 minimal overlay manager supplied as an example by Cygnus. The
2921 entry point is via a function pointer "target_overlay_update",
2922 so targets that use a different runtime overlay manager can
2923 substitute their own overlay_update function and take over the
2926 The overlay_update function pokes around in the target's data structures
2927 to see what overlays are mapped, and updates GDB's overlay mapping with
2930 In this simple implementation, the target data structures are as follows:
2931 unsigned _novlys; /# number of overlay sections #/
2932 unsigned _ovly_table[_novlys][4] = {
2933 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
2934 {..., ..., ..., ...},
2936 unsigned _novly_regions; /# number of overlay regions #/
2937 unsigned _ovly_region_table[_novly_regions][3] = {
2938 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
2941 These functions will attempt to update GDB's mappedness state in the
2942 symbol section table, based on the target's mappedness state.
2944 To do this, we keep a cached copy of the target's _ovly_table, and
2945 attempt to detect when the cached copy is invalidated. The main
2946 entry point is "simple_overlay_update(SECT), which looks up SECT in
2947 the cached table and re-reads only the entry for that section from
2948 the target (whenever possible).
2951 /* Cached, dynamically allocated copies of the target data structures: */
2952 static unsigned (*cache_ovly_table
)[4] = 0;
2954 static unsigned (*cache_ovly_region_table
)[3] = 0;
2956 static unsigned cache_novlys
= 0;
2958 static unsigned cache_novly_regions
= 0;
2960 static CORE_ADDR cache_ovly_table_base
= 0;
2962 static CORE_ADDR cache_ovly_region_table_base
= 0;
2966 VMA
, SIZE
, LMA
, MAPPED
2968 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
2970 /* Throw away the cached copy of _ovly_table */
2972 simple_free_overlay_table (void)
2974 if (cache_ovly_table
)
2975 xfree (cache_ovly_table
);
2977 cache_ovly_table
= NULL
;
2978 cache_ovly_table_base
= 0;
2982 /* Throw away the cached copy of _ovly_region_table */
2984 simple_free_overlay_region_table (void)
2986 if (cache_ovly_region_table
)
2987 xfree (cache_ovly_region_table
);
2988 cache_novly_regions
= 0;
2989 cache_ovly_region_table
= NULL
;
2990 cache_ovly_region_table_base
= 0;
2994 /* Read an array of ints from the target into a local buffer.
2995 Convert to host order. int LEN is number of ints */
2997 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
, int len
)
2999 char *buf
= alloca (len
* TARGET_LONG_BYTES
);
3002 read_memory (memaddr
, buf
, len
* TARGET_LONG_BYTES
);
3003 for (i
= 0; i
< len
; i
++)
3004 myaddr
[i
] = extract_unsigned_integer (TARGET_LONG_BYTES
* i
+ buf
,
3008 /* Find and grab a copy of the target _ovly_table
3009 (and _novlys, which is needed for the table's size) */
3011 simple_read_overlay_table (void)
3013 struct minimal_symbol
*msym
;
3015 simple_free_overlay_table ();
3016 msym
= lookup_minimal_symbol ("_novlys", 0, 0);
3018 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
3020 return 0; /* failure */
3021 cache_ovly_table
= (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3022 if (cache_ovly_table
!= NULL
)
3024 msym
= lookup_minimal_symbol ("_ovly_table", 0, 0);
3027 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3028 read_target_long_array (cache_ovly_table_base
,
3029 (int *) cache_ovly_table
,
3033 return 0; /* failure */
3036 return 0; /* failure */
3037 return 1; /* SUCCESS */
3041 /* Find and grab a copy of the target _ovly_region_table
3042 (and _novly_regions, which is needed for the table's size) */
3044 simple_read_overlay_region_table (void)
3046 struct minimal_symbol
*msym
;
3048 simple_free_overlay_region_table ();
3049 msym
= lookup_minimal_symbol ("_novly_regions", 0, 0);
3051 cache_novly_regions
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
3053 return 0; /* failure */
3054 cache_ovly_region_table
= (void *) xmalloc (cache_novly_regions
* 12);
3055 if (cache_ovly_region_table
!= NULL
)
3057 msym
= lookup_minimal_symbol ("_ovly_region_table", 0, 0);
3060 cache_ovly_region_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3061 read_target_long_array (cache_ovly_region_table_base
,
3062 (int *) cache_ovly_region_table
,
3063 cache_novly_regions
* 3);
3066 return 0; /* failure */
3069 return 0; /* failure */
3070 return 1; /* SUCCESS */
3074 /* Function: simple_overlay_update_1
3075 A helper function for simple_overlay_update. Assuming a cached copy
3076 of _ovly_table exists, look through it to find an entry whose vma,
3077 lma and size match those of OSECT. Re-read the entry and make sure
3078 it still matches OSECT (else the table may no longer be valid).
3079 Set OSECT's mapped state to match the entry. Return: 1 for
3080 success, 0 for failure. */
3083 simple_overlay_update_1 (struct obj_section
*osect
)
3087 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3088 for (i
= 0; i
< cache_novlys
; i
++)
3089 if (cache_ovly_table
[i
][VMA
] == osect
->the_bfd_section
->vma
&&
3090 cache_ovly_table
[i
][LMA
] == osect
->the_bfd_section
->lma
/* &&
3091 cache_ovly_table[i][SIZE] == size */ )
3093 read_target_long_array (cache_ovly_table_base
+ i
* TARGET_LONG_BYTES
,
3094 (int *) cache_ovly_table
[i
], 4);
3095 if (cache_ovly_table
[i
][VMA
] == osect
->the_bfd_section
->vma
&&
3096 cache_ovly_table
[i
][LMA
] == osect
->the_bfd_section
->lma
/* &&
3097 cache_ovly_table[i][SIZE] == size */ )
3099 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3102 else /* Warning! Warning! Target's ovly table has changed! */
3108 /* Function: simple_overlay_update
3109 If OSECT is NULL, then update all sections' mapped state
3110 (after re-reading the entire target _ovly_table).
3111 If OSECT is non-NULL, then try to find a matching entry in the
3112 cached ovly_table and update only OSECT's mapped state.
3113 If a cached entry can't be found or the cache isn't valid, then
3114 re-read the entire cache, and go ahead and update all sections. */
3117 simple_overlay_update (struct obj_section
*osect
)
3119 struct objfile
*objfile
;
3121 /* Were we given an osect to look up? NULL means do all of them. */
3123 /* Have we got a cached copy of the target's overlay table? */
3124 if (cache_ovly_table
!= NULL
)
3125 /* Does its cached location match what's currently in the symtab? */
3126 if (cache_ovly_table_base
==
3127 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", 0, 0)))
3128 /* Then go ahead and try to look up this single section in the cache */
3129 if (simple_overlay_update_1 (osect
))
3130 /* Found it! We're done. */
3133 /* Cached table no good: need to read the entire table anew.
3134 Or else we want all the sections, in which case it's actually
3135 more efficient to read the whole table in one block anyway. */
3137 if (simple_read_overlay_table () == 0) /* read failed? No table? */
3139 warning ("Failed to read the target overlay mapping table.");
3142 /* Now may as well update all sections, even if only one was requested. */
3143 ALL_OBJSECTIONS (objfile
, osect
)
3144 if (section_is_overlay (osect
->the_bfd_section
))
3148 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3149 for (i
= 0; i
< cache_novlys
; i
++)
3150 if (cache_ovly_table
[i
][VMA
] == osect
->the_bfd_section
->vma
&&
3151 cache_ovly_table
[i
][LMA
] == osect
->the_bfd_section
->lma
/* &&
3152 cache_ovly_table[i][SIZE] == size */ )
3153 { /* obj_section matches i'th entry in ovly_table */
3154 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3155 break; /* finished with inner for loop: break out */
3162 _initialize_symfile (void)
3164 struct cmd_list_element
*c
;
3166 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
,
3167 "Load symbol table from executable file FILE.\n\
3168 The `file' command can also load symbol tables, as well as setting the file\n\
3169 to execute.", &cmdlist
);
3170 c
->completer
= filename_completer
;
3172 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
,
3173 "Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3174 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3175 ADDR is the starting address of the file's text.\n\
3176 The optional arguments are section-name section-address pairs and\n\
3177 should be specified if the data and bss segments are not contiguous\n\
3178 with the text. SECT is a section name to be loaded at SECT_ADDR.",
3180 c
->completer
= filename_completer
;
3182 c
= add_cmd ("add-shared-symbol-files", class_files
,
3183 add_shared_symbol_files_command
,
3184 "Load the symbols from shared objects in the dynamic linker's link map.",
3186 c
= add_alias_cmd ("assf", "add-shared-symbol-files", class_files
, 1,
3189 c
= add_cmd ("load", class_files
, load_command
,
3190 "Dynamically load FILE into the running program, and record its symbols\n\
3191 for access from GDB.", &cmdlist
);
3192 c
->completer
= filename_completer
;
3195 (add_set_cmd ("symbol-reloading", class_support
, var_boolean
,
3196 (char *) &symbol_reloading
,
3197 "Set dynamic symbol table reloading multiple times in one run.",
3201 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3202 "Commands for debugging overlays.", &overlaylist
,
3203 "overlay ", 0, &cmdlist
);
3205 add_com_alias ("ovly", "overlay", class_alias
, 1);
3206 add_com_alias ("ov", "overlay", class_alias
, 1);
3208 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3209 "Assert that an overlay section is mapped.", &overlaylist
);
3211 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3212 "Assert that an overlay section is unmapped.", &overlaylist
);
3214 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3215 "List mappings of overlay sections.", &overlaylist
);
3217 add_cmd ("manual", class_support
, overlay_manual_command
,
3218 "Enable overlay debugging.", &overlaylist
);
3219 add_cmd ("off", class_support
, overlay_off_command
,
3220 "Disable overlay debugging.", &overlaylist
);
3221 add_cmd ("auto", class_support
, overlay_auto_command
,
3222 "Enable automatic overlay debugging.", &overlaylist
);
3223 add_cmd ("load-target", class_support
, overlay_load_command
,
3224 "Read the overlay mapping state from the target.", &overlaylist
);
3226 /* Filename extension to source language lookup table: */
3227 init_filename_language_table ();
3228 c
= add_set_cmd ("extension-language", class_files
, var_string_noescape
,
3230 "Set mapping between filename extension and source language.\n\
3231 Usage: set extension-language .foo bar",
3233 c
->function
.cfunc
= set_ext_lang_command
;
3235 add_info ("extensions", info_ext_lang_command
,
3236 "All filename extensions associated with a source language.");
3239 (add_set_cmd ("download-write-size", class_obscure
,
3240 var_integer
, (char *) &download_write_size
,
3241 "Set the write size used when downloading a program.\n"
3242 "Only used when downloading a program onto a remote\n"
3243 "target. Specify zero, or a negative value, to disable\n"
3244 "blocked writes. The actual size of each transfer is also\n"
3245 "limited by the size of the target packet and the memory\n"