1 /* Generic symbol file reading for the GNU debugger, GDB.
2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998
3 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"
42 #include <sys/types.h>
44 #include "gdb_string.h"
58 /* Some HP-UX related globals to clear when a new "main"
59 symbol file is loaded. HP-specific. */
61 extern int hp_som_som_object_present
;
62 extern int hp_cxx_exception_support_initialized
;
63 #define RESET_HP_UX_GLOBALS() do {\
64 hp_som_som_object_present = 0; /* indicates HP-compiled code */ \
65 hp_cxx_exception_support_initialized = 0; /* must reinitialize exception stuff */ \
69 int (*ui_load_progress_hook
) PARAMS ((char *, unsigned long));
70 void (*pre_add_symbol_hook
) PARAMS ((char *));
71 void (*post_add_symbol_hook
) PARAMS ((void));
73 /* Global variables owned by this file */
74 int readnow_symbol_files
; /* Read full symbols immediately */
76 struct complaint oldsyms_complaint
=
78 "Replacing old symbols for `%s'", 0, 0
81 struct complaint empty_symtab_complaint
=
83 "Empty symbol table found for `%s'", 0, 0
86 /* External variables and functions referenced. */
88 extern int info_verbose
;
90 extern void report_transfer_performance
PARAMS ((unsigned long,
93 /* Functions this file defines */
96 static int simple_read_overlay_region_table
PARAMS ((void));
97 static void simple_free_overlay_region_table
PARAMS ((void));
100 static void set_initial_language
PARAMS ((void));
102 static void load_command
PARAMS ((char *, int));
104 static void add_symbol_file_command
PARAMS ((char *, int));
106 static void add_shared_symbol_files_command
PARAMS ((char *, int));
108 static void cashier_psymtab
PARAMS ((struct partial_symtab
*));
110 static int compare_psymbols
PARAMS ((const void *, const void *));
112 static int compare_symbols
PARAMS ((const void *, const void *));
114 bfd
*symfile_bfd_open
PARAMS ((char *));
116 static void find_sym_fns
PARAMS ((struct objfile
*));
118 static void decrement_reading_symtab
PARAMS ((void *));
120 static void overlay_invalidate_all
PARAMS ((void));
122 static int overlay_is_mapped
PARAMS ((struct obj_section
*));
124 void list_overlays_command
PARAMS ((char *, int));
126 void map_overlay_command
PARAMS ((char *, int));
128 void unmap_overlay_command
PARAMS ((char *, int));
130 static void overlay_auto_command
PARAMS ((char *, int));
132 static void overlay_manual_command
PARAMS ((char *, int));
134 static void overlay_off_command
PARAMS ((char *, int));
136 static void overlay_load_command
PARAMS ((char *, int));
138 static void overlay_command
PARAMS ((char *, int));
140 static void simple_free_overlay_table
PARAMS ((void));
142 static void read_target_long_array
PARAMS ((CORE_ADDR
, unsigned int *, int));
144 static int simple_read_overlay_table
PARAMS ((void));
146 static int simple_overlay_update_1
PARAMS ((struct obj_section
*));
148 static void add_filename_language
PARAMS ((char *ext
, enum language lang
));
150 static void set_ext_lang_command
PARAMS ((char *args
, int from_tty
));
152 static void info_ext_lang_command
PARAMS ((char *args
, int from_tty
));
154 static void init_filename_language_table
PARAMS ((void));
156 void _initialize_symfile
PARAMS ((void));
158 /* List of all available sym_fns. On gdb startup, each object file reader
159 calls add_symtab_fns() to register information on each format it is
162 static struct sym_fns
*symtab_fns
= NULL
;
164 /* Flag for whether user will be reloading symbols multiple times.
165 Defaults to ON for VxWorks, otherwise OFF. */
167 #ifdef SYMBOL_RELOADING_DEFAULT
168 int symbol_reloading
= SYMBOL_RELOADING_DEFAULT
;
170 int symbol_reloading
= 0;
173 /* If non-zero, then on HP-UX (i.e., platforms that use somsolib.c),
174 this variable is interpreted as a threshhold. If adding a new
175 library's symbol table to those already known to the debugger would
176 exceed this threshhold, then the shlib's symbols are not added.
178 If non-zero on other platforms, shared library symbols will be added
179 automatically when the inferior is created, new libraries are loaded,
180 or when attaching to the inferior. This is almost always what users
181 will want to have happen; but for very large programs, the startup
182 time will be excessive, and so if this is a problem, the user can
183 clear this flag and then add the shared library symbols as needed.
184 Note that there is a potential for confusion, since if the shared
185 library symbols are not loaded, commands like "info fun" will *not*
186 report all the functions that are actually present.
188 Note that HP-UX interprets this variable to mean, "threshhold size
189 in megabytes, where zero means never add". Other platforms interpret
190 this variable to mean, "always add if non-zero, never add if zero."
193 int auto_solib_add
= 1;
196 /* Since this function is called from within qsort, in an ANSI environment
197 it must conform to the prototype for qsort, which specifies that the
198 comparison function takes two "void *" pointers. */
201 compare_symbols (s1p
, s2p
)
205 register struct symbol
**s1
, **s2
;
207 s1
= (struct symbol
**) s1p
;
208 s2
= (struct symbol
**) s2p
;
210 return (STRCMP (SYMBOL_NAME (*s1
), SYMBOL_NAME (*s2
)));
217 compare_psymbols -- compare two partial symbols by name
221 Given pointers to pointers to two partial symbol table entries,
222 compare them by name and return -N, 0, or +N (ala strcmp).
223 Typically used by sorting routines like qsort().
227 Does direct compare of first two characters before punting
228 and passing to strcmp for longer compares. Note that the
229 original version had a bug whereby two null strings or two
230 identically named one character strings would return the
231 comparison of memory following the null byte.
236 compare_psymbols (s1p
, s2p
)
240 register char *st1
= SYMBOL_NAME (*(struct partial_symbol
**) s1p
);
241 register char *st2
= SYMBOL_NAME (*(struct partial_symbol
**) s2p
);
243 if ((st1
[0] - st2
[0]) || !st1
[0])
245 return (st1
[0] - st2
[0]);
247 else if ((st1
[1] - st2
[1]) || !st1
[1])
249 return (st1
[1] - st2
[1]);
253 /* Note: I replaced the STRCMP line (commented out below)
254 * with a simpler "strcmp()" which compares the 2 strings
255 * from the beginning. (STRCMP is a macro which first compares
256 * the initial characters, then falls back on strcmp).
257 * The reason is that the STRCMP line was tickling a C compiler
258 * bug on HP-UX 10.30, which is avoided with the simpler
259 * code. The performance gain from the more complicated code
260 * is negligible, given that we have already checked the
261 * initial 2 characters above. I reported the compiler bug,
262 * and once it is fixed the original line can be put back. RT
264 /* return ( STRCMP (st1 + 2, st2 + 2)); */
265 return (strcmp (st1
, st2
));
270 sort_pst_symbols (pst
)
271 struct partial_symtab
*pst
;
273 /* Sort the global list; don't sort the static list */
275 qsort (pst
->objfile
->global_psymbols
.list
+ pst
->globals_offset
,
276 pst
->n_global_syms
, sizeof (struct partial_symbol
*),
280 /* Call sort_block_syms to sort alphabetically the symbols of one block. */
284 register struct block
*b
;
286 qsort (&BLOCK_SYM (b
, 0), BLOCK_NSYMS (b
),
287 sizeof (struct symbol
*), compare_symbols
);
290 /* Call sort_symtab_syms to sort alphabetically
291 the symbols of each block of one symtab. */
295 register struct symtab
*s
;
297 register struct blockvector
*bv
;
300 register struct block
*b
;
304 bv
= BLOCKVECTOR (s
);
305 nbl
= BLOCKVECTOR_NBLOCKS (bv
);
306 for (i
= 0; i
< nbl
; i
++)
308 b
= BLOCKVECTOR_BLOCK (bv
, i
);
309 if (BLOCK_SHOULD_SORT (b
))
314 /* Make a null terminated copy of the string at PTR with SIZE characters in
315 the obstack pointed to by OBSTACKP . Returns the address of the copy.
316 Note that the string at PTR does not have to be null terminated, I.E. it
317 may be part of a larger string and we are only saving a substring. */
320 obsavestring (ptr
, size
, obstackp
)
323 struct obstack
*obstackp
;
325 register char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
326 /* Open-coded memcpy--saves function call time. These strings are usually
327 short. FIXME: Is this really still true with a compiler that can
330 register char *p1
= ptr
;
331 register char *p2
= p
;
332 char *end
= ptr
+ size
;
340 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
341 in the obstack pointed to by OBSTACKP. */
344 obconcat (obstackp
, s1
, s2
, s3
)
345 struct obstack
*obstackp
;
346 const char *s1
, *s2
, *s3
;
348 register int len
= strlen (s1
) + strlen (s2
) + strlen (s3
) + 1;
349 register char *val
= (char *) obstack_alloc (obstackp
, len
);
356 /* True if we are nested inside psymtab_to_symtab. */
358 int currently_reading_symtab
= 0;
361 decrement_reading_symtab (dummy
)
364 currently_reading_symtab
--;
367 /* Get the symbol table that corresponds to a partial_symtab.
368 This is fast after the first time you do it. In fact, there
369 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
373 psymtab_to_symtab (pst
)
374 register struct partial_symtab
*pst
;
376 /* If it's been looked up before, return it. */
380 /* If it has not yet been read in, read it. */
383 struct cleanup
*back_to
= make_cleanup (decrement_reading_symtab
, NULL
);
384 currently_reading_symtab
++;
385 (*pst
->read_symtab
) (pst
);
386 do_cleanups (back_to
);
392 /* Initialize entry point information for this objfile. */
395 init_entry_point_info (objfile
)
396 struct objfile
*objfile
;
398 /* Save startup file's range of PC addresses to help blockframe.c
399 decide where the bottom of the stack is. */
401 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
403 /* Executable file -- record its entry point so we'll recognize
404 the startup file because it contains the entry point. */
405 objfile
->ei
.entry_point
= bfd_get_start_address (objfile
->obfd
);
409 /* Examination of non-executable.o files. Short-circuit this stuff. */
410 objfile
->ei
.entry_point
= INVALID_ENTRY_POINT
;
412 objfile
->ei
.entry_file_lowpc
= INVALID_ENTRY_LOWPC
;
413 objfile
->ei
.entry_file_highpc
= INVALID_ENTRY_HIGHPC
;
414 objfile
->ei
.entry_func_lowpc
= INVALID_ENTRY_LOWPC
;
415 objfile
->ei
.entry_func_highpc
= INVALID_ENTRY_HIGHPC
;
416 objfile
->ei
.main_func_lowpc
= INVALID_ENTRY_LOWPC
;
417 objfile
->ei
.main_func_highpc
= INVALID_ENTRY_HIGHPC
;
420 /* Get current entry point address. */
423 entry_point_address ()
425 return symfile_objfile
? symfile_objfile
->ei
.entry_point
: 0;
428 /* Remember the lowest-addressed loadable section we've seen.
429 This function is called via bfd_map_over_sections.
431 In case of equal vmas, the section with the largest size becomes the
432 lowest-addressed loadable section.
434 If the vmas and sizes are equal, the last section is considered the
435 lowest-addressed loadable section. */
438 find_lowest_section (abfd
, sect
, obj
)
443 asection
**lowest
= (asection
**) obj
;
445 if (0 == (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
))
448 *lowest
= sect
; /* First loadable section */
449 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
450 *lowest
= sect
; /* A lower loadable section */
451 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
452 && (bfd_section_size (abfd
, (*lowest
))
453 <= bfd_section_size (abfd
, sect
)))
457 /* Parse the user's idea of an offset for dynamic linking, into our idea
458 of how to represent it for fast symbol reading. This is the default
459 version of the sym_fns.sym_offsets function for symbol readers that
460 don't need to do anything special. It allocates a section_offsets table
461 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
463 struct section_offsets
*
464 default_symfile_offsets (objfile
, addr
)
465 struct objfile
*objfile
;
468 struct section_offsets
*section_offsets
;
471 objfile
->num_sections
= SECT_OFF_MAX
;
472 section_offsets
= (struct section_offsets
*)
473 obstack_alloc (&objfile
->psymbol_obstack
, SIZEOF_SECTION_OFFSETS
);
474 memset (section_offsets
, 0, SIZEOF_SECTION_OFFSETS
);
476 for (i
= 0; i
< SECT_OFF_MAX
; i
++)
477 ANOFFSET (section_offsets
, i
) = addr
;
479 return section_offsets
;
483 /* Process a symbol file, as either the main file or as a dynamically
486 NAME is the file name (which will be tilde-expanded and made
487 absolute herein) (but we don't free or modify NAME itself).
488 FROM_TTY says how verbose to be. MAINLINE specifies whether this
489 is the main symbol file, or whether it's an extra symbol file such
490 as dynamically loaded code. If !mainline, ADDR is the address
491 where the text segment was loaded. If VERBO, the caller has printed
492 a verbose message about the symbol reading (and complaints can be
493 more terse about it). */
496 syms_from_objfile (objfile
, addr
, mainline
, verbo
)
497 struct objfile
*objfile
;
502 struct section_offsets
*section_offsets
;
503 asection
*lowest_sect
;
504 struct cleanup
*old_chain
;
506 init_entry_point_info (objfile
);
507 find_sym_fns (objfile
);
509 /* Make sure that partially constructed symbol tables will be cleaned up
510 if an error occurs during symbol reading. */
511 old_chain
= make_cleanup ((make_cleanup_func
) free_objfile
, objfile
);
515 /* We will modify the main symbol table, make sure that all its users
516 will be cleaned up if an error occurs during symbol reading. */
517 make_cleanup ((make_cleanup_func
) clear_symtab_users
, 0);
519 /* Since no error yet, throw away the old symbol table. */
521 if (symfile_objfile
!= NULL
)
523 free_objfile (symfile_objfile
);
524 symfile_objfile
= NULL
;
527 /* Currently we keep symbols from the add-symbol-file command.
528 If the user wants to get rid of them, they should do "symbol-file"
529 without arguments first. Not sure this is the best behavior
532 (*objfile
->sf
->sym_new_init
) (objfile
);
535 /* Convert addr into an offset rather than an absolute address.
536 We find the lowest address of a loaded segment in the objfile,
537 and assume that <addr> is where that got loaded. Due to historical
538 precedent, we warn if that doesn't happen to be a text segment. */
542 addr
= 0; /* No offset from objfile addresses. */
546 lowest_sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
547 if (lowest_sect
== NULL
)
548 bfd_map_over_sections (objfile
->obfd
, find_lowest_section
,
549 (PTR
) & lowest_sect
);
551 if (lowest_sect
== NULL
)
552 warning ("no loadable sections found in added symbol-file %s",
554 else if ((bfd_get_section_flags (objfile
->obfd
, lowest_sect
) & SEC_CODE
)
556 /* FIXME-32x64--assumes bfd_vma fits in long. */
557 warning ("Lowest section in %s is %s at 0x%lx",
559 bfd_section_name (objfile
->obfd
, lowest_sect
),
560 (unsigned long) bfd_section_vma (objfile
->obfd
, lowest_sect
));
563 addr
-= bfd_section_vma (objfile
->obfd
, lowest_sect
);
566 /* Initialize symbol reading routines for this objfile, allow complaints to
567 appear for this new file, and record how verbose to be, then do the
568 initial symbol reading for this file. */
570 (*objfile
->sf
->sym_init
) (objfile
);
571 clear_complaints (1, verbo
);
573 section_offsets
= (*objfile
->sf
->sym_offsets
) (objfile
, addr
);
574 objfile
->section_offsets
= section_offsets
;
576 #ifndef IBM6000_TARGET
577 /* This is a SVR4/SunOS specific hack, I think. In any event, it
578 screws RS/6000. sym_offsets should be doing this sort of thing,
579 because it knows the mapping between bfd sections and
581 /* This is a hack. As far as I can tell, section offsets are not
582 target dependent. They are all set to addr with a couple of
583 exceptions. The exceptions are sysvr4 shared libraries, whose
584 offsets are kept in solib structures anyway and rs6000 xcoff
585 which handles shared libraries in a completely unique way.
587 Section offsets are built similarly, except that they are built
588 by adding addr in all cases because there is no clear mapping
589 from section_offsets into actual sections. Note that solib.c
590 has a different algorythm for finding section offsets.
592 These should probably all be collapsed into some target
593 independent form of shared library support. FIXME. */
597 struct obj_section
*s
;
599 for (s
= objfile
->sections
; s
< objfile
->sections_end
; ++s
)
601 s
->addr
-= s
->offset
;
603 s
->endaddr
-= s
->offset
;
608 #endif /* not IBM6000_TARGET */
610 (*objfile
->sf
->sym_read
) (objfile
, section_offsets
, mainline
);
612 if (!have_partial_symbols () && !have_full_symbols ())
615 printf_filtered ("(no debugging symbols found)...");
619 /* Don't allow char * to have a typename (else would get caddr_t).
620 Ditto void *. FIXME: Check whether this is now done by all the
621 symbol readers themselves (many of them now do), and if so remove
624 TYPE_NAME (lookup_pointer_type (builtin_type_char
)) = 0;
625 TYPE_NAME (lookup_pointer_type (builtin_type_void
)) = 0;
627 /* Mark the objfile has having had initial symbol read attempted. Note
628 that this does not mean we found any symbols... */
630 objfile
->flags
|= OBJF_SYMS
;
632 /* Discard cleanups as symbol reading was successful. */
634 discard_cleanups (old_chain
);
636 /* Call this after reading in a new symbol table to give target dependant code
637 a crack at the new symbols. For instance, this could be used to update the
638 values of target-specific symbols GDB needs to keep track of (such as
639 _sigtramp, or whatever). */
641 TARGET_SYMFILE_POSTREAD (objfile
);
644 /* Perform required actions after either reading in the initial
645 symbols for a new objfile, or mapping in the symbols from a reusable
649 new_symfile_objfile (objfile
, mainline
, verbo
)
650 struct objfile
*objfile
;
655 /* If this is the main symbol file we have to clean up all users of the
656 old main symbol file. Otherwise it is sufficient to fixup all the
657 breakpoints that may have been redefined by this symbol file. */
660 /* OK, make it the "real" symbol file. */
661 symfile_objfile
= objfile
;
663 clear_symtab_users ();
667 breakpoint_re_set ();
670 /* We're done reading the symbol file; finish off complaints. */
671 clear_complaints (0, verbo
);
674 /* Process a symbol file, as either the main file or as a dynamically
677 NAME is the file name (which will be tilde-expanded and made
678 absolute herein) (but we don't free or modify NAME itself).
679 FROM_TTY says how verbose to be. MAINLINE specifies whether this
680 is the main symbol file, or whether it's an extra symbol file such
681 as dynamically loaded code. If !mainline, ADDR is the address
682 where the text segment was loaded.
684 USER_LOADED is TRUE if the add-symbol-file command was how this
685 symbol file came to be processed.
687 IS_SOLIB is TRUE if this symbol file represents a solib, as discovered
688 by the target's implementation of the solib package.
690 Upon success, returns a pointer to the objfile that was added.
691 Upon failure, jumps back to command level (never returns). */
694 symbol_file_add (name
, from_tty
, addr
, mainline
, mapped
, readnow
, user_loaded
, is_solib
)
704 struct objfile
*objfile
;
705 struct partial_symtab
*psymtab
;
708 /* Open a bfd for the file, and give user a chance to burp if we'd be
709 interactively wiping out any existing symbols. */
711 abfd
= symfile_bfd_open (name
);
713 if ((have_full_symbols () || have_partial_symbols ())
716 && !query ("Load new symbol table from \"%s\"? ", name
))
717 error ("Not confirmed.");
719 objfile
= allocate_objfile (abfd
, mapped
, user_loaded
, is_solib
);
721 /* If the objfile uses a mapped symbol file, and we have a psymtab for
722 it, then skip reading any symbols at this time. */
724 if ((objfile
->flags
& OBJF_MAPPED
) && (objfile
->flags
& OBJF_SYMS
))
726 /* We mapped in an existing symbol table file that already has had
727 initial symbol reading performed, so we can skip that part. Notify
728 the user that instead of reading the symbols, they have been mapped.
730 if (from_tty
|| info_verbose
)
732 printf_filtered ("Mapped symbols for %s...", name
);
734 gdb_flush (gdb_stdout
);
736 init_entry_point_info (objfile
);
737 find_sym_fns (objfile
);
741 /* We either created a new mapped symbol table, mapped an existing
742 symbol table file which has not had initial symbol reading
743 performed, or need to read an unmapped symbol table. */
744 if (from_tty
|| info_verbose
)
746 if (pre_add_symbol_hook
)
747 pre_add_symbol_hook (name
);
750 printf_filtered ("Reading symbols from %s...", name
);
752 gdb_flush (gdb_stdout
);
755 syms_from_objfile (objfile
, addr
, mainline
, from_tty
);
758 /* We now have at least a partial symbol table. Check to see if the
759 user requested that all symbols be read on initial access via either
760 the gdb startup command line or on a per symbol file basis. Expand
761 all partial symbol tables for this objfile if so. */
763 if (readnow
|| readnow_symbol_files
)
765 if (from_tty
|| info_verbose
)
767 printf_filtered ("expanding to full symbols...");
769 gdb_flush (gdb_stdout
);
772 for (psymtab
= objfile
->psymtabs
;
774 psymtab
= psymtab
->next
)
776 psymtab_to_symtab (psymtab
);
780 if (from_tty
|| info_verbose
)
782 if (post_add_symbol_hook
)
783 post_add_symbol_hook ();
786 printf_filtered ("done.\n");
787 gdb_flush (gdb_stdout
);
791 new_symfile_objfile (objfile
, mainline
, from_tty
);
793 target_new_objfile (objfile
);
798 /* This is the symbol-file command. Read the file, analyze its
799 symbols, and add a struct symtab to a symtab list. The syntax of
800 the command is rather bizarre--(1) buildargv implements various
801 quoting conventions which are undocumented and have little or
802 nothing in common with the way things are quoted (or not quoted)
803 elsewhere in GDB, (2) options are used, which are not generally
804 used in GDB (perhaps "set mapped on", "set readnow on" would be
805 better), (3) the order of options matters, which is contrary to GNU
806 conventions (because it is confusing and inconvenient). */
809 symbol_file_command (args
, from_tty
)
815 CORE_ADDR text_relocation
= 0; /* text_relocation */
816 struct cleanup
*cleanups
;
824 if ((have_full_symbols () || have_partial_symbols ())
826 && !query ("Discard symbol table from `%s'? ",
827 symfile_objfile
->name
))
828 error ("Not confirmed.");
829 free_all_objfiles ();
831 /* solib descriptors may have handles to objfiles. Since their
832 storage has just been released, we'd better wipe the solib
835 #if defined(SOLIB_RESTART)
839 symfile_objfile
= NULL
;
842 printf_unfiltered ("No symbol file now.\n");
845 RESET_HP_UX_GLOBALS ();
850 if ((argv
= buildargv (args
)) == NULL
)
854 cleanups
= make_cleanup_freeargv (argv
);
855 while (*argv
!= NULL
)
857 if (STREQ (*argv
, "-mapped"))
861 else if (STREQ (*argv
, "-readnow"))
865 else if (**argv
== '-')
867 error ("unknown option `%s'", *argv
);
875 /* this is for rombug remote only, to get the text relocation by
876 using link command */
877 p
= strrchr (name
, '/');
883 target_link (p
, &text_relocation
);
885 if (text_relocation
== (CORE_ADDR
) 0)
887 else if (text_relocation
== (CORE_ADDR
) - 1)
889 symbol_file_add (name
, from_tty
, (CORE_ADDR
) 0,
890 1, mapped
, readnow
, 1, 0);
892 RESET_HP_UX_GLOBALS ();
896 symbol_file_add (name
, from_tty
, (CORE_ADDR
) text_relocation
,
897 0, mapped
, readnow
, 1, 0);
899 /* Getting new symbols may change our opinion about what is
901 reinit_frame_cache ();
903 set_initial_language ();
910 error ("no symbol file name was specified");
912 TUIDO (((TuiOpaqueFuncPtr
) tuiDisplayMainFunction
));
913 do_cleanups (cleanups
);
917 /* Set the initial language.
919 A better solution would be to record the language in the psymtab when reading
920 partial symbols, and then use it (if known) to set the language. This would
921 be a win for formats that encode the language in an easily discoverable place,
922 such as DWARF. For stabs, we can jump through hoops looking for specially
923 named symbols or try to intuit the language from the specific type of stabs
924 we find, but we can't do that until later when we read in full symbols.
928 set_initial_language ()
930 struct partial_symtab
*pst
;
931 enum language lang
= language_unknown
;
933 pst
= find_main_psymtab ();
936 if (pst
->filename
!= NULL
)
938 lang
= deduce_language_from_filename (pst
->filename
);
940 if (lang
== language_unknown
)
942 /* Make C the default language */
946 expected_language
= current_language
; /* Don't warn the user */
950 /* Open file specified by NAME and hand it off to BFD for preliminary
951 analysis. Result is a newly initialized bfd *, which includes a newly
952 malloc'd` copy of NAME (tilde-expanded and made absolute).
953 In case of trouble, error() is called. */
956 symfile_bfd_open (name
)
965 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy */
967 /* Look down path for it, allocate 2nd new malloc'd copy. */
968 desc
= openp (getenv ("PATH"), 1, name
, O_RDONLY
| O_BINARY
, 0, &absolute_name
);
969 #if defined(__GO32__) || defined(_WIN32)
972 char *exename
= alloca (strlen (name
) + 5);
973 strcat (strcpy (exename
, name
), ".exe");
974 desc
= openp (getenv ("PATH"), 1, exename
, O_RDONLY
| O_BINARY
,
980 make_cleanup (free
, name
);
981 perror_with_name (name
);
983 free (name
); /* Free 1st new malloc'd copy */
984 name
= absolute_name
; /* Keep 2nd malloc'd copy in bfd */
985 /* It'll be freed in free_objfile(). */
987 sym_bfd
= bfd_fdopenr (name
, gnutarget
, desc
);
991 make_cleanup (free
, name
);
992 error ("\"%s\": can't open to read symbols: %s.", name
,
993 bfd_errmsg (bfd_get_error ()));
995 sym_bfd
->cacheable
= true;
997 if (!bfd_check_format (sym_bfd
, bfd_object
))
999 /* FIXME: should be checking for errors from bfd_close (for one thing,
1000 on error it does not free all the storage associated with the
1002 bfd_close (sym_bfd
); /* This also closes desc */
1003 make_cleanup (free
, name
);
1004 error ("\"%s\": can't read symbols: %s.", name
,
1005 bfd_errmsg (bfd_get_error ()));
1010 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1011 startup by the _initialize routine in each object file format reader,
1012 to register information about each format the the reader is prepared
1019 sf
->next
= symtab_fns
;
1024 /* Initialize to read symbols from the symbol file sym_bfd. It either
1025 returns or calls error(). The result is an initialized struct sym_fns
1026 in the objfile structure, that contains cached information about the
1030 find_sym_fns (objfile
)
1031 struct objfile
*objfile
;
1034 enum bfd_flavour our_flavour
= bfd_get_flavour (objfile
->obfd
);
1035 char *our_target
= bfd_get_target (objfile
->obfd
);
1037 /* Special kludge for RS/6000 and PowerMac. See xcoffread.c. */
1038 if (STREQ (our_target
, "aixcoff-rs6000") ||
1039 STREQ (our_target
, "xcoff-powermac"))
1040 our_flavour
= (enum bfd_flavour
) -1;
1042 /* Special kludge for apollo. See dstread.c. */
1043 if (STREQN (our_target
, "apollo", 6))
1044 our_flavour
= (enum bfd_flavour
) -2;
1046 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
->next
)
1048 if (our_flavour
== sf
->sym_flavour
)
1054 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
1055 bfd_get_target (objfile
->obfd
));
1058 /* This function runs the load command of our current target. */
1061 load_command (arg
, from_tty
)
1066 arg
= get_exec_file (1);
1067 target_load (arg
, from_tty
);
1070 /* This version of "load" should be usable for any target. Currently
1071 it is just used for remote targets, not inftarg.c or core files,
1072 on the theory that only in that case is it useful.
1074 Avoiding xmodem and the like seems like a win (a) because we don't have
1075 to worry about finding it, and (b) On VMS, fork() is very slow and so
1076 we don't want to run a subprocess. On the other hand, I'm not sure how
1077 performance compares. */
1078 #define GENERIC_LOAD_CHUNK 256
1079 #define VALIDATE_DOWNLOAD 0
1081 generic_load (filename
, from_tty
)
1085 struct cleanup
*old_cleanups
;
1088 time_t start_time
, end_time
; /* Start and end times of download */
1089 unsigned long data_count
= 0; /* Number of bytes transferred to memory */
1091 unsigned long load_offset
= 0; /* offset to add to vma for each section */
1092 char buf
[GENERIC_LOAD_CHUNK
+ 8];
1093 #if VALIDATE_DOWNLOAD
1094 char verify_buffer
[GENERIC_LOAD_CHUNK
+ 8];
1097 /* enable user to specify address for downloading as 2nd arg to load */
1098 n
= sscanf (filename
, "%s 0x%lx", buf
, &load_offset
);
1104 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
1105 if (loadfile_bfd
== NULL
)
1107 perror_with_name (filename
);
1110 /* FIXME: should be checking for errors from bfd_close (for one thing,
1111 on error it does not free all the storage associated with the
1113 old_cleanups
= make_cleanup ((make_cleanup_func
) bfd_close
, loadfile_bfd
);
1115 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
1117 error ("\"%s\" is not an object file: %s", filename
,
1118 bfd_errmsg (bfd_get_error ()));
1121 start_time
= time (NULL
);
1123 for (s
= loadfile_bfd
->sections
; s
; s
= s
->next
)
1125 if (s
->flags
& SEC_LOAD
)
1129 size
= bfd_get_section_size_before_reloc (s
);
1133 struct cleanup
*old_chain
;
1135 unsigned long l
= size
;
1141 l
= l
> GENERIC_LOAD_CHUNK
? GENERIC_LOAD_CHUNK
: l
;
1143 buffer
= xmalloc (size
);
1144 old_chain
= make_cleanup (free
, buffer
);
1149 /* Is this really necessary? I guess it gives the user something
1150 to look at during a long download. */
1151 printf_filtered ("Loading section %s, size 0x%lx lma ",
1152 bfd_get_section_name (loadfile_bfd
, s
),
1153 (unsigned long) size
);
1154 print_address_numeric (lma
, 1, gdb_stdout
);
1155 printf_filtered ("\n");
1157 bfd_get_section_contents (loadfile_bfd
, s
, buffer
, 0, size
);
1159 sect
= (char *) bfd_get_section_name (loadfile_bfd
, s
);
1163 len
= (size
- sent
) < l
? (size
- sent
) : l
;
1165 err
= target_write_memory (lma
, buffer
, len
);
1166 if (ui_load_progress_hook
)
1167 if (ui_load_progress_hook (sect
, sent
))
1168 error ("Canceled the download");
1169 #if VALIDATE_DOWNLOAD
1170 /* Broken memories and broken monitors manifest themselves
1171 here when bring new computers to life.
1172 This doubles already slow downloads.
1177 target_read_memory (lma
, verify_buffer
, len
);
1178 if (0 != bcmp (buffer
, verify_buffer
, len
))
1179 error ("Download verify failed at %08x",
1180 (unsigned long) lma
);
1188 while (err
== 0 && sent
< size
);
1191 error ("Memory access error while loading section %s.",
1192 bfd_get_section_name (loadfile_bfd
, s
));
1194 do_cleanups (old_chain
);
1199 end_time
= time (NULL
);
1201 unsigned long entry
;
1202 entry
= bfd_get_start_address (loadfile_bfd
);
1203 printf_filtered ("Start address 0x%lx , load size %d\n", entry
, data_count
);
1204 /* We were doing this in remote-mips.c, I suspect it is right
1205 for other targets too. */
1209 /* FIXME: are we supposed to call symbol_file_add or not? According to
1210 a comment from remote-mips.c (where a call to symbol_file_add was
1211 commented out), making the call confuses GDB if more than one file is
1212 loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c
1215 report_transfer_performance (data_count
, start_time
, end_time
);
1217 do_cleanups (old_cleanups
);
1220 /* Report how fast the transfer went. */
1223 report_transfer_performance (data_count
, start_time
, end_time
)
1224 unsigned long data_count
;
1225 time_t start_time
, end_time
;
1227 printf_filtered ("Transfer rate: ");
1228 if (end_time
!= start_time
)
1229 printf_filtered ("%d bits/sec",
1230 (data_count
* 8) / (end_time
- start_time
));
1232 printf_filtered ("%d bits in <1 sec", (data_count
* 8));
1233 printf_filtered (".\n");
1236 /* This function allows the addition of incrementally linked object files.
1237 It does not modify any state in the target, only in the debugger. */
1241 add_symbol_file_command (args
, from_tty
)
1246 CORE_ADDR text_addr
;
1255 error ("add-symbol-file takes a file name and an address");
1258 /* Make a copy of the string that we can safely write into. */
1260 args
= strdup (args
);
1261 make_cleanup (free
, args
);
1263 /* Pick off any -option args and the file name. */
1265 while ((*args
!= '\000') && (name
== NULL
))
1267 while (isspace (*args
))
1272 while ((*args
!= '\000') && !isspace (*args
))
1276 if (*args
!= '\000')
1284 else if (STREQ (arg
, "-mapped"))
1288 else if (STREQ (arg
, "-readnow"))
1294 error ("unknown option `%s'", arg
);
1298 /* After picking off any options and the file name, args should be
1299 left pointing at the remainder of the command line, which should
1300 be the address expression to evaluate. */
1304 error ("add-symbol-file takes a file name");
1306 name
= tilde_expand (name
);
1307 make_cleanup (free
, name
);
1309 if (*args
!= '\000')
1311 text_addr
= parse_and_eval_address (args
);
1315 target_link (name
, &text_addr
);
1316 if (text_addr
== (CORE_ADDR
) - 1)
1317 error ("Don't know how to get text start location for this file");
1320 /* FIXME-32x64: Assumes text_addr fits in a long. */
1322 && (!query ("add symbol table from file \"%s\" at text_addr = %s?\n",
1323 name
, local_hex_string ((unsigned long) text_addr
))))
1324 error ("Not confirmed.");
1326 symbol_file_add (name
, from_tty
, text_addr
, 0, mapped
, readnow
,
1327 1, /* user_loaded */
1328 0); /* We'll guess it's ! is_solib */
1330 /* Getting new symbols may change our opinion about what is
1332 reinit_frame_cache ();
1336 add_shared_symbol_files_command (args
, from_tty
)
1340 #ifdef ADD_SHARED_SYMBOL_FILES
1341 ADD_SHARED_SYMBOL_FILES (args
, from_tty
);
1343 error ("This command is not available in this configuration of GDB.");
1347 /* Re-read symbols if a symbol-file has changed. */
1351 struct objfile
*objfile
;
1354 struct stat new_statbuf
;
1357 /* With the addition of shared libraries, this should be modified,
1358 the load time should be saved in the partial symbol tables, since
1359 different tables may come from different source files. FIXME.
1360 This routine should then walk down each partial symbol table
1361 and see if the symbol table that it originates from has been changed */
1363 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
1367 #ifdef IBM6000_TARGET
1368 /* If this object is from a shared library, then you should
1369 stat on the library name, not member name. */
1371 if (objfile
->obfd
->my_archive
)
1372 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
1375 res
= stat (objfile
->name
, &new_statbuf
);
1378 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1379 printf_filtered ("`%s' has disappeared; keeping its symbols.\n",
1383 new_modtime
= new_statbuf
.st_mtime
;
1384 if (new_modtime
!= objfile
->mtime
)
1386 struct cleanup
*old_cleanups
;
1387 struct section_offsets
*offsets
;
1389 int section_offsets_size
;
1390 char *obfd_filename
;
1392 printf_filtered ("`%s' has changed; re-reading symbols.\n",
1395 /* There are various functions like symbol_file_add,
1396 symfile_bfd_open, syms_from_objfile, etc., which might
1397 appear to do what we want. But they have various other
1398 effects which we *don't* want. So we just do stuff
1399 ourselves. We don't worry about mapped files (for one thing,
1400 any mapped file will be out of date). */
1402 /* If we get an error, blow away this objfile (not sure if
1403 that is the correct response for things like shared
1405 old_cleanups
= make_cleanup ((make_cleanup_func
) free_objfile
,
1407 /* We need to do this whenever any symbols go away. */
1408 make_cleanup ((make_cleanup_func
) clear_symtab_users
, 0);
1410 /* Clean up any state BFD has sitting around. We don't need
1411 to close the descriptor but BFD lacks a way of closing the
1412 BFD without closing the descriptor. */
1413 obfd_filename
= bfd_get_filename (objfile
->obfd
);
1414 if (!bfd_close (objfile
->obfd
))
1415 error ("Can't close BFD for %s: %s", objfile
->name
,
1416 bfd_errmsg (bfd_get_error ()));
1417 objfile
->obfd
= bfd_openr (obfd_filename
, gnutarget
);
1418 if (objfile
->obfd
== NULL
)
1419 error ("Can't open %s to read symbols.", objfile
->name
);
1420 /* bfd_openr sets cacheable to true, which is what we want. */
1421 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
1422 error ("Can't read symbols from %s: %s.", objfile
->name
,
1423 bfd_errmsg (bfd_get_error ()));
1425 /* Save the offsets, we will nuke them with the rest of the
1427 num_offsets
= objfile
->num_sections
;
1428 section_offsets_size
=
1429 sizeof (struct section_offsets
)
1430 + sizeof (objfile
->section_offsets
->offsets
) * num_offsets
;
1431 offsets
= (struct section_offsets
*) alloca (section_offsets_size
);
1432 memcpy (offsets
, objfile
->section_offsets
, section_offsets_size
);
1434 /* Nuke all the state that we will re-read. Much of the following
1435 code which sets things to NULL really is necessary to tell
1436 other parts of GDB that there is nothing currently there. */
1438 /* FIXME: Do we have to free a whole linked list, or is this
1440 if (objfile
->global_psymbols
.list
)
1441 mfree (objfile
->md
, objfile
->global_psymbols
.list
);
1442 memset (&objfile
->global_psymbols
, 0,
1443 sizeof (objfile
->global_psymbols
));
1444 if (objfile
->static_psymbols
.list
)
1445 mfree (objfile
->md
, objfile
->static_psymbols
.list
);
1446 memset (&objfile
->static_psymbols
, 0,
1447 sizeof (objfile
->static_psymbols
));
1449 /* Free the obstacks for non-reusable objfiles */
1450 obstack_free (&objfile
->psymbol_cache
.cache
, 0);
1451 memset (&objfile
->psymbol_cache
, 0,
1452 sizeof (objfile
->psymbol_cache
));
1453 obstack_free (&objfile
->psymbol_obstack
, 0);
1454 obstack_free (&objfile
->symbol_obstack
, 0);
1455 obstack_free (&objfile
->type_obstack
, 0);
1456 objfile
->sections
= NULL
;
1457 objfile
->symtabs
= NULL
;
1458 objfile
->psymtabs
= NULL
;
1459 objfile
->free_psymtabs
= NULL
;
1460 objfile
->msymbols
= NULL
;
1461 objfile
->minimal_symbol_count
= 0;
1462 objfile
->fundamental_types
= NULL
;
1463 if (objfile
->sf
!= NULL
)
1465 (*objfile
->sf
->sym_finish
) (objfile
);
1468 /* We never make this a mapped file. */
1470 /* obstack_specify_allocation also initializes the obstack so
1472 obstack_specify_allocation (&objfile
->psymbol_cache
.cache
, 0, 0,
1474 obstack_specify_allocation (&objfile
->psymbol_obstack
, 0, 0,
1476 obstack_specify_allocation (&objfile
->symbol_obstack
, 0, 0,
1478 obstack_specify_allocation (&objfile
->type_obstack
, 0, 0,
1480 if (build_objfile_section_table (objfile
))
1482 error ("Can't find the file sections in `%s': %s",
1483 objfile
->name
, bfd_errmsg (bfd_get_error ()));
1486 /* We use the same section offsets as from last time. I'm not
1487 sure whether that is always correct for shared libraries. */
1488 objfile
->section_offsets
= (struct section_offsets
*)
1489 obstack_alloc (&objfile
->psymbol_obstack
, section_offsets_size
);
1490 memcpy (objfile
->section_offsets
, offsets
, section_offsets_size
);
1491 objfile
->num_sections
= num_offsets
;
1493 /* What the hell is sym_new_init for, anyway? The concept of
1494 distinguishing between the main file and additional files
1495 in this way seems rather dubious. */
1496 if (objfile
== symfile_objfile
)
1498 (*objfile
->sf
->sym_new_init
) (objfile
);
1500 RESET_HP_UX_GLOBALS ();
1504 (*objfile
->sf
->sym_init
) (objfile
);
1505 clear_complaints (1, 1);
1506 /* The "mainline" parameter is a hideous hack; I think leaving it
1507 zero is OK since dbxread.c also does what it needs to do if
1508 objfile->global_psymbols.size is 0. */
1509 (*objfile
->sf
->sym_read
) (objfile
, objfile
->section_offsets
, 0);
1510 if (!have_partial_symbols () && !have_full_symbols ())
1513 printf_filtered ("(no debugging symbols found)\n");
1516 objfile
->flags
|= OBJF_SYMS
;
1518 /* We're done reading the symbol file; finish off complaints. */
1519 clear_complaints (0, 1);
1521 /* Getting new symbols may change our opinion about what is
1524 reinit_frame_cache ();
1526 /* Discard cleanups as symbol reading was successful. */
1527 discard_cleanups (old_cleanups
);
1529 /* If the mtime has changed between the time we set new_modtime
1530 and now, we *want* this to be out of date, so don't call stat
1532 objfile
->mtime
= new_modtime
;
1535 /* Call this after reading in a new symbol table to give target
1536 dependant code a crack at the new symbols. For instance, this
1537 could be used to update the values of target-specific symbols GDB
1538 needs to keep track of (such as _sigtramp, or whatever). */
1540 TARGET_SYMFILE_POSTREAD (objfile
);
1546 clear_symtab_users ();
1558 static filename_language
*filename_language_table
;
1559 static int fl_table_size
, fl_table_next
;
1562 add_filename_language (ext
, lang
)
1566 if (fl_table_next
>= fl_table_size
)
1568 fl_table_size
+= 10;
1569 filename_language_table
= realloc (filename_language_table
,
1573 filename_language_table
[fl_table_next
].ext
= strsave (ext
);
1574 filename_language_table
[fl_table_next
].lang
= lang
;
1578 static char *ext_args
;
1581 set_ext_lang_command (args
, from_tty
)
1586 char *cp
= ext_args
;
1589 /* First arg is filename extension, starting with '.' */
1591 error ("'%s': Filename extension must begin with '.'", ext_args
);
1593 /* Find end of first arg. */
1594 while (*cp
&& !isspace (*cp
))
1598 error ("'%s': two arguments required -- filename extension and language",
1601 /* Null-terminate first arg */
1604 /* Find beginning of second arg, which should be a source language. */
1605 while (*cp
&& isspace (*cp
))
1609 error ("'%s': two arguments required -- filename extension and language",
1612 /* Lookup the language from among those we know. */
1613 lang
= language_enum (cp
);
1615 /* Now lookup the filename extension: do we already know it? */
1616 for (i
= 0; i
< fl_table_next
; i
++)
1617 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
1620 if (i
>= fl_table_next
)
1622 /* new file extension */
1623 add_filename_language (ext_args
, lang
);
1627 /* redefining a previously known filename extension */
1630 /* query ("Really make files of type %s '%s'?", */
1631 /* ext_args, language_str (lang)); */
1633 free (filename_language_table
[i
].ext
);
1634 filename_language_table
[i
].ext
= strsave (ext_args
);
1635 filename_language_table
[i
].lang
= lang
;
1640 info_ext_lang_command (args
, from_tty
)
1646 printf_filtered ("Filename extensions and the languages they represent:");
1647 printf_filtered ("\n\n");
1648 for (i
= 0; i
< fl_table_next
; i
++)
1649 printf_filtered ("\t%s\t- %s\n",
1650 filename_language_table
[i
].ext
,
1651 language_str (filename_language_table
[i
].lang
));
1655 init_filename_language_table ()
1657 if (fl_table_size
== 0) /* protect against repetition */
1661 filename_language_table
=
1662 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
1663 add_filename_language (".c", language_c
);
1664 add_filename_language (".C", language_cplus
);
1665 add_filename_language (".cc", language_cplus
);
1666 add_filename_language (".cp", language_cplus
);
1667 add_filename_language (".cpp", language_cplus
);
1668 add_filename_language (".cxx", language_cplus
);
1669 add_filename_language (".c++", language_cplus
);
1670 add_filename_language (".java", language_java
);
1671 add_filename_language (".class", language_java
);
1672 add_filename_language (".ch", language_chill
);
1673 add_filename_language (".c186", language_chill
);
1674 add_filename_language (".c286", language_chill
);
1675 add_filename_language (".f", language_fortran
);
1676 add_filename_language (".F", language_fortran
);
1677 add_filename_language (".s", language_asm
);
1678 add_filename_language (".S", language_asm
);
1683 deduce_language_from_filename (filename
)
1689 if (filename
!= NULL
)
1690 if ((cp
= strrchr (filename
, '.')) != NULL
)
1691 for (i
= 0; i
< fl_table_next
; i
++)
1692 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
1693 return filename_language_table
[i
].lang
;
1695 return language_unknown
;
1700 Allocate and partly initialize a new symbol table. Return a pointer
1701 to it. error() if no space.
1703 Caller must set these fields:
1709 possibly free_named_symtabs (symtab->filename);
1713 allocate_symtab (filename
, objfile
)
1715 struct objfile
*objfile
;
1717 register struct symtab
*symtab
;
1719 symtab
= (struct symtab
*)
1720 obstack_alloc (&objfile
->symbol_obstack
, sizeof (struct symtab
));
1721 memset (symtab
, 0, sizeof (*symtab
));
1722 symtab
->filename
= obsavestring (filename
, strlen (filename
),
1723 &objfile
->symbol_obstack
);
1724 symtab
->fullname
= NULL
;
1725 symtab
->language
= deduce_language_from_filename (filename
);
1726 symtab
->debugformat
= obsavestring ("unknown", 7,
1727 &objfile
->symbol_obstack
);
1729 /* Hook it to the objfile it comes from */
1731 symtab
->objfile
= objfile
;
1732 symtab
->next
= objfile
->symtabs
;
1733 objfile
->symtabs
= symtab
;
1735 /* FIXME: This should go away. It is only defined for the Z8000,
1736 and the Z8000 definition of this macro doesn't have anything to
1737 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
1738 here for convenience. */
1739 #ifdef INIT_EXTRA_SYMTAB_INFO
1740 INIT_EXTRA_SYMTAB_INFO (symtab
);
1746 struct partial_symtab
*
1747 allocate_psymtab (filename
, objfile
)
1749 struct objfile
*objfile
;
1751 struct partial_symtab
*psymtab
;
1753 if (objfile
->free_psymtabs
)
1755 psymtab
= objfile
->free_psymtabs
;
1756 objfile
->free_psymtabs
= psymtab
->next
;
1759 psymtab
= (struct partial_symtab
*)
1760 obstack_alloc (&objfile
->psymbol_obstack
,
1761 sizeof (struct partial_symtab
));
1763 memset (psymtab
, 0, sizeof (struct partial_symtab
));
1764 psymtab
->filename
= obsavestring (filename
, strlen (filename
),
1765 &objfile
->psymbol_obstack
);
1766 psymtab
->symtab
= NULL
;
1768 /* Prepend it to the psymtab list for the objfile it belongs to.
1769 Psymtabs are searched in most recent inserted -> least recent
1772 psymtab
->objfile
= objfile
;
1773 psymtab
->next
= objfile
->psymtabs
;
1774 objfile
->psymtabs
= psymtab
;
1777 struct partial_symtab
**prev_pst
;
1778 psymtab
->objfile
= objfile
;
1779 psymtab
->next
= NULL
;
1780 prev_pst
= &(objfile
->psymtabs
);
1781 while ((*prev_pst
) != NULL
)
1782 prev_pst
= &((*prev_pst
)->next
);
1783 (*prev_pst
) = psymtab
;
1791 discard_psymtab (pst
)
1792 struct partial_symtab
*pst
;
1794 struct partial_symtab
**prev_pst
;
1797 Empty psymtabs happen as a result of header files which don't
1798 have any symbols in them. There can be a lot of them. But this
1799 check is wrong, in that a psymtab with N_SLINE entries but
1800 nothing else is not empty, but we don't realize that. Fixing
1801 that without slowing things down might be tricky. */
1803 /* First, snip it out of the psymtab chain */
1805 prev_pst
= &(pst
->objfile
->psymtabs
);
1806 while ((*prev_pst
) != pst
)
1807 prev_pst
= &((*prev_pst
)->next
);
1808 (*prev_pst
) = pst
->next
;
1810 /* Next, put it on a free list for recycling */
1812 pst
->next
= pst
->objfile
->free_psymtabs
;
1813 pst
->objfile
->free_psymtabs
= pst
;
1817 /* Reset all data structures in gdb which may contain references to symbol
1821 clear_symtab_users ()
1823 /* Someday, we should do better than this, by only blowing away
1824 the things that really need to be blown. */
1825 clear_value_history ();
1827 clear_internalvars ();
1828 breakpoint_re_set ();
1829 set_default_breakpoint (0, 0, 0, 0);
1830 current_source_symtab
= 0;
1831 current_source_line
= 0;
1832 clear_pc_function_cache ();
1833 target_new_objfile (NULL
);
1836 /* clear_symtab_users_once:
1838 This function is run after symbol reading, or from a cleanup.
1839 If an old symbol table was obsoleted, the old symbol table
1840 has been blown away, but the other GDB data structures that may
1841 reference it have not yet been cleared or re-directed. (The old
1842 symtab was zapped, and the cleanup queued, in free_named_symtab()
1845 This function can be queued N times as a cleanup, or called
1846 directly; it will do all the work the first time, and then will be a
1847 no-op until the next time it is queued. This works by bumping a
1848 counter at queueing time. Much later when the cleanup is run, or at
1849 the end of symbol processing (in case the cleanup is discarded), if
1850 the queued count is greater than the "done-count", we do the work
1851 and set the done-count to the queued count. If the queued count is
1852 less than or equal to the done-count, we just ignore the call. This
1853 is needed because reading a single .o file will often replace many
1854 symtabs (one per .h file, for example), and we don't want to reset
1855 the breakpoints N times in the user's face.
1857 The reason we both queue a cleanup, and call it directly after symbol
1858 reading, is because the cleanup protects us in case of errors, but is
1859 discarded if symbol reading is successful. */
1862 /* FIXME: As free_named_symtabs is currently a big noop this function
1863 is no longer needed. */
1865 clear_symtab_users_once
PARAMS ((void));
1867 static int clear_symtab_users_queued
;
1868 static int clear_symtab_users_done
;
1871 clear_symtab_users_once ()
1873 /* Enforce once-per-`do_cleanups'-semantics */
1874 if (clear_symtab_users_queued
<= clear_symtab_users_done
)
1876 clear_symtab_users_done
= clear_symtab_users_queued
;
1878 clear_symtab_users ();
1882 /* Delete the specified psymtab, and any others that reference it. */
1885 cashier_psymtab (pst
)
1886 struct partial_symtab
*pst
;
1888 struct partial_symtab
*ps
, *pprev
= NULL
;
1891 /* Find its previous psymtab in the chain */
1892 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
1901 /* Unhook it from the chain. */
1902 if (ps
== pst
->objfile
->psymtabs
)
1903 pst
->objfile
->psymtabs
= ps
->next
;
1905 pprev
->next
= ps
->next
;
1907 /* FIXME, we can't conveniently deallocate the entries in the
1908 partial_symbol lists (global_psymbols/static_psymbols) that
1909 this psymtab points to. These just take up space until all
1910 the psymtabs are reclaimed. Ditto the dependencies list and
1911 filename, which are all in the psymbol_obstack. */
1913 /* We need to cashier any psymtab that has this one as a dependency... */
1915 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
1917 for (i
= 0; i
< ps
->number_of_dependencies
; i
++)
1919 if (ps
->dependencies
[i
] == pst
)
1921 cashier_psymtab (ps
);
1922 goto again
; /* Must restart, chain has been munged. */
1929 /* If a symtab or psymtab for filename NAME is found, free it along
1930 with any dependent breakpoints, displays, etc.
1931 Used when loading new versions of object modules with the "add-file"
1932 command. This is only called on the top-level symtab or psymtab's name;
1933 it is not called for subsidiary files such as .h files.
1935 Return value is 1 if we blew away the environment, 0 if not.
1936 FIXME. The return valu appears to never be used.
1938 FIXME. I think this is not the best way to do this. We should
1939 work on being gentler to the environment while still cleaning up
1940 all stray pointers into the freed symtab. */
1943 free_named_symtabs (name
)
1947 /* FIXME: With the new method of each objfile having it's own
1948 psymtab list, this function needs serious rethinking. In particular,
1949 why was it ever necessary to toss psymtabs with specific compilation
1950 unit filenames, as opposed to all psymtabs from a particular symbol
1952 Well, the answer is that some systems permit reloading of particular
1953 compilation units. We want to blow away any old info about these
1954 compilation units, regardless of which objfiles they arrived in. --gnu. */
1956 register struct symtab
*s
;
1957 register struct symtab
*prev
;
1958 register struct partial_symtab
*ps
;
1959 struct blockvector
*bv
;
1962 /* We only wack things if the symbol-reload switch is set. */
1963 if (!symbol_reloading
)
1966 /* Some symbol formats have trouble providing file names... */
1967 if (name
== 0 || *name
== '\0')
1970 /* Look for a psymtab with the specified name. */
1973 for (ps
= partial_symtab_list
; ps
; ps
= ps
->next
)
1975 if (STREQ (name
, ps
->filename
))
1977 cashier_psymtab (ps
); /* Blow it away...and its little dog, too. */
1978 goto again2
; /* Must restart, chain has been munged */
1982 /* Look for a symtab with the specified name. */
1984 for (s
= symtab_list
; s
; s
= s
->next
)
1986 if (STREQ (name
, s
->filename
))
1993 if (s
== symtab_list
)
1994 symtab_list
= s
->next
;
1996 prev
->next
= s
->next
;
1998 /* For now, queue a delete for all breakpoints, displays, etc., whether
1999 or not they depend on the symtab being freed. This should be
2000 changed so that only those data structures affected are deleted. */
2002 /* But don't delete anything if the symtab is empty.
2003 This test is necessary due to a bug in "dbxread.c" that
2004 causes empty symtabs to be created for N_SO symbols that
2005 contain the pathname of the object file. (This problem
2006 has been fixed in GDB 3.9x). */
2008 bv
= BLOCKVECTOR (s
);
2009 if (BLOCKVECTOR_NBLOCKS (bv
) > 2
2010 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
))
2011 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)))
2013 complain (&oldsyms_complaint
, name
);
2015 clear_symtab_users_queued
++;
2016 make_cleanup (clear_symtab_users_once
, 0);
2021 complain (&empty_symtab_complaint
, name
);
2028 /* It is still possible that some breakpoints will be affected
2029 even though no symtab was found, since the file might have
2030 been compiled without debugging, and hence not be associated
2031 with a symtab. In order to handle this correctly, we would need
2032 to keep a list of text address ranges for undebuggable files.
2033 For now, we do nothing, since this is a fairly obscure case. */
2037 /* FIXME, what about the minimal symbol table? */
2044 /* Allocate and partially fill a partial symtab. It will be
2045 completely filled at the end of the symbol list.
2047 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2048 is the address relative to which its symbols are (incremental) or 0
2052 struct partial_symtab
*
2053 start_psymtab_common (objfile
, section_offsets
,
2054 filename
, textlow
, global_syms
, static_syms
)
2055 struct objfile
*objfile
;
2056 struct section_offsets
*section_offsets
;
2059 struct partial_symbol
**global_syms
;
2060 struct partial_symbol
**static_syms
;
2062 struct partial_symtab
*psymtab
;
2064 psymtab
= allocate_psymtab (filename
, objfile
);
2065 psymtab
->section_offsets
= section_offsets
;
2066 psymtab
->textlow
= textlow
;
2067 psymtab
->texthigh
= psymtab
->textlow
; /* default */
2068 psymtab
->globals_offset
= global_syms
- objfile
->global_psymbols
.list
;
2069 psymtab
->statics_offset
= static_syms
- objfile
->static_psymbols
.list
;
2073 /* Add a symbol with a long value to a psymtab.
2074 Since one arg is a struct, we pass in a ptr and deref it (sigh). */
2077 add_psymbol_to_list (name
, namelength
, namespace, class, list
, val
, coreaddr
,
2081 namespace_enum
namespace;
2082 enum address_class
class;
2083 struct psymbol_allocation_list
*list
;
2084 long val
; /* Value as a long */
2085 CORE_ADDR coreaddr
; /* Value as a CORE_ADDR */
2086 enum language language
;
2087 struct objfile
*objfile
;
2089 register struct partial_symbol
*psym
;
2090 char *buf
= alloca (namelength
+ 1);
2091 /* psymbol is static so that there will be no uninitialized gaps in the
2092 structure which might contain random data, causing cache misses in
2094 static struct partial_symbol psymbol
;
2096 /* Create local copy of the partial symbol */
2097 memcpy (buf
, name
, namelength
);
2098 buf
[namelength
] = '\0';
2099 SYMBOL_NAME (&psymbol
) = bcache (buf
, namelength
+ 1, &objfile
->psymbol_cache
);
2100 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2103 SYMBOL_VALUE (&psymbol
) = val
;
2107 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2109 SYMBOL_SECTION (&psymbol
) = 0;
2110 SYMBOL_LANGUAGE (&psymbol
) = language
;
2111 PSYMBOL_NAMESPACE (&psymbol
) = namespace;
2112 PSYMBOL_CLASS (&psymbol
) = class;
2113 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2115 /* Stash the partial symbol away in the cache */
2116 psym
= bcache (&psymbol
, sizeof (struct partial_symbol
), &objfile
->psymbol_cache
);
2118 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2119 if (list
->next
>= list
->list
+ list
->size
)
2121 extend_psymbol_list (list
, objfile
);
2123 *list
->next
++ = psym
;
2124 OBJSTAT (objfile
, n_psyms
++);
2127 /* Add a symbol with a long value to a psymtab. This differs from
2128 * add_psymbol_to_list above in taking both a mangled and a demangled
2132 add_psymbol_with_dem_name_to_list (name
, namelength
, dem_name
, dem_namelength
,
2133 namespace, class, list
, val
, coreaddr
, language
, objfile
)
2138 namespace_enum
namespace;
2139 enum address_class
class;
2140 struct psymbol_allocation_list
*list
;
2141 long val
; /* Value as a long */
2142 CORE_ADDR coreaddr
; /* Value as a CORE_ADDR */
2143 enum language language
;
2144 struct objfile
*objfile
;
2146 register struct partial_symbol
*psym
;
2147 char *buf
= alloca (namelength
+ 1);
2148 /* psymbol is static so that there will be no uninitialized gaps in the
2149 structure which might contain random data, causing cache misses in
2151 static struct partial_symbol psymbol
;
2153 /* Create local copy of the partial symbol */
2155 memcpy (buf
, name
, namelength
);
2156 buf
[namelength
] = '\0';
2157 SYMBOL_NAME (&psymbol
) = bcache (buf
, namelength
+ 1, &objfile
->psymbol_cache
);
2159 buf
= alloca (dem_namelength
+ 1);
2160 memcpy (buf
, dem_name
, dem_namelength
);
2161 buf
[dem_namelength
] = '\0';
2166 case language_cplus
:
2167 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol
) =
2168 bcache (buf
, dem_namelength
+ 1, &objfile
->psymbol_cache
);
2170 case language_chill
:
2171 SYMBOL_CHILL_DEMANGLED_NAME (&psymbol
) =
2172 bcache (buf
, dem_namelength
+ 1, &objfile
->psymbol_cache
);
2174 /* FIXME What should be done for the default case? Ignoring for now. */
2177 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2180 SYMBOL_VALUE (&psymbol
) = val
;
2184 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2186 SYMBOL_SECTION (&psymbol
) = 0;
2187 SYMBOL_LANGUAGE (&psymbol
) = language
;
2188 PSYMBOL_NAMESPACE (&psymbol
) = namespace;
2189 PSYMBOL_CLASS (&psymbol
) = class;
2190 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2192 /* Stash the partial symbol away in the cache */
2193 psym
= bcache (&psymbol
, sizeof (struct partial_symbol
), &objfile
->psymbol_cache
);
2195 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2196 if (list
->next
>= list
->list
+ list
->size
)
2198 extend_psymbol_list (list
, objfile
);
2200 *list
->next
++ = psym
;
2201 OBJSTAT (objfile
, n_psyms
++);
2204 /* Initialize storage for partial symbols. */
2207 init_psymbol_list (objfile
, total_symbols
)
2208 struct objfile
*objfile
;
2211 /* Free any previously allocated psymbol lists. */
2213 if (objfile
->global_psymbols
.list
)
2215 mfree (objfile
->md
, (PTR
) objfile
->global_psymbols
.list
);
2217 if (objfile
->static_psymbols
.list
)
2219 mfree (objfile
->md
, (PTR
) objfile
->static_psymbols
.list
);
2222 /* Current best guess is that approximately a twentieth
2223 of the total symbols (in a debugging file) are global or static
2226 objfile
->global_psymbols
.size
= total_symbols
/ 10;
2227 objfile
->static_psymbols
.size
= total_symbols
/ 10;
2229 if (objfile
->global_psymbols
.size
> 0)
2231 objfile
->global_psymbols
.next
=
2232 objfile
->global_psymbols
.list
= (struct partial_symbol
**)
2233 xmmalloc (objfile
->md
, (objfile
->global_psymbols
.size
2234 * sizeof (struct partial_symbol
*)));
2236 if (objfile
->static_psymbols
.size
> 0)
2238 objfile
->static_psymbols
.next
=
2239 objfile
->static_psymbols
.list
= (struct partial_symbol
**)
2240 xmmalloc (objfile
->md
, (objfile
->static_psymbols
.size
2241 * sizeof (struct partial_symbol
*)));
2246 The following code implements an abstraction for debugging overlay sections.
2248 The target model is as follows:
2249 1) The gnu linker will permit multiple sections to be mapped into the
2250 same VMA, each with its own unique LMA (or load address).
2251 2) It is assumed that some runtime mechanism exists for mapping the
2252 sections, one by one, from the load address into the VMA address.
2253 3) This code provides a mechanism for gdb to keep track of which
2254 sections should be considered to be mapped from the VMA to the LMA.
2255 This information is used for symbol lookup, and memory read/write.
2256 For instance, if a section has been mapped then its contents
2257 should be read from the VMA, otherwise from the LMA.
2259 Two levels of debugger support for overlays are available. One is
2260 "manual", in which the debugger relies on the user to tell it which
2261 overlays are currently mapped. This level of support is
2262 implemented entirely in the core debugger, and the information about
2263 whether a section is mapped is kept in the objfile->obj_section table.
2265 The second level of support is "automatic", and is only available if
2266 the target-specific code provides functionality to read the target's
2267 overlay mapping table, and translate its contents for the debugger
2268 (by updating the mapped state information in the obj_section tables).
2270 The interface is as follows:
2272 overlay map <name> -- tell gdb to consider this section mapped
2273 overlay unmap <name> -- tell gdb to consider this section unmapped
2274 overlay list -- list the sections that GDB thinks are mapped
2275 overlay read-target -- get the target's state of what's mapped
2276 overlay off/manual/auto -- set overlay debugging state
2277 Functional interface:
2278 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2279 section, return that section.
2280 find_pc_overlay(pc): find any overlay section that contains
2281 the pc, either in its VMA or its LMA
2282 overlay_is_mapped(sect): true if overlay is marked as mapped
2283 section_is_overlay(sect): true if section's VMA != LMA
2284 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2285 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2286 overlay_mapped_address(...): map an address from section's LMA to VMA
2287 overlay_unmapped_address(...): map an address from section's VMA to LMA
2288 symbol_overlayed_address(...): Return a "current" address for symbol:
2289 either in VMA or LMA depending on whether
2290 the symbol's section is currently mapped
2293 /* Overlay debugging state: */
2295 int overlay_debugging
= 0; /* 0 == off, 1 == manual, -1 == auto */
2296 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
2298 /* Target vector for refreshing overlay mapped state */
2299 static void simple_overlay_update
PARAMS ((struct obj_section
*));
2300 void (*target_overlay_update
) PARAMS ((struct obj_section
*))
2301 = simple_overlay_update
;
2303 /* Function: section_is_overlay (SECTION)
2304 Returns true if SECTION has VMA not equal to LMA, ie.
2305 SECTION is loaded at an address different from where it will "run". */
2308 section_is_overlay (section
)
2311 if (overlay_debugging
)
2312 if (section
&& section
->lma
!= 0 &&
2313 section
->vma
!= section
->lma
)
2319 /* Function: overlay_invalidate_all (void)
2320 Invalidate the mapped state of all overlay sections (mark it as stale). */
2323 overlay_invalidate_all ()
2325 struct objfile
*objfile
;
2326 struct obj_section
*sect
;
2328 ALL_OBJSECTIONS (objfile
, sect
)
2329 if (section_is_overlay (sect
->the_bfd_section
))
2330 sect
->ovly_mapped
= -1;
2333 /* Function: overlay_is_mapped (SECTION)
2334 Returns true if section is an overlay, and is currently mapped.
2335 Private: public access is thru function section_is_mapped.
2337 Access to the ovly_mapped flag is restricted to this function, so
2338 that we can do automatic update. If the global flag
2339 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2340 overlay_invalidate_all. If the mapped state of the particular
2341 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2344 overlay_is_mapped (osect
)
2345 struct obj_section
*osect
;
2347 if (osect
== 0 || !section_is_overlay (osect
->the_bfd_section
))
2350 switch (overlay_debugging
)
2354 return 0; /* overlay debugging off */
2355 case -1: /* overlay debugging automatic */
2356 /* Unles there is a target_overlay_update function,
2357 there's really nothing useful to do here (can't really go auto) */
2358 if (target_overlay_update
)
2360 if (overlay_cache_invalid
)
2362 overlay_invalidate_all ();
2363 overlay_cache_invalid
= 0;
2365 if (osect
->ovly_mapped
== -1)
2366 (*target_overlay_update
) (osect
);
2368 /* fall thru to manual case */
2369 case 1: /* overlay debugging manual */
2370 return osect
->ovly_mapped
== 1;
2374 /* Function: section_is_mapped
2375 Returns true if section is an overlay, and is currently mapped. */
2378 section_is_mapped (section
)
2381 struct objfile
*objfile
;
2382 struct obj_section
*osect
;
2384 if (overlay_debugging
)
2385 if (section
&& section_is_overlay (section
))
2386 ALL_OBJSECTIONS (objfile
, osect
)
2387 if (osect
->the_bfd_section
== section
)
2388 return overlay_is_mapped (osect
);
2393 /* Function: pc_in_unmapped_range
2394 If PC falls into the lma range of SECTION, return true, else false. */
2397 pc_in_unmapped_range (pc
, section
)
2403 if (overlay_debugging
)
2404 if (section
&& section_is_overlay (section
))
2406 size
= bfd_get_section_size_before_reloc (section
);
2407 if (section
->lma
<= pc
&& pc
< section
->lma
+ size
)
2413 /* Function: pc_in_mapped_range
2414 If PC falls into the vma range of SECTION, return true, else false. */
2417 pc_in_mapped_range (pc
, section
)
2423 if (overlay_debugging
)
2424 if (section
&& section_is_overlay (section
))
2426 size
= bfd_get_section_size_before_reloc (section
);
2427 if (section
->vma
<= pc
&& pc
< section
->vma
+ size
)
2433 /* Function: overlay_unmapped_address (PC, SECTION)
2434 Returns the address corresponding to PC in the unmapped (load) range.
2435 May be the same as PC. */
2438 overlay_unmapped_address (pc
, section
)
2442 if (overlay_debugging
)
2443 if (section
&& section_is_overlay (section
) &&
2444 pc_in_mapped_range (pc
, section
))
2445 return pc
+ section
->lma
- section
->vma
;
2450 /* Function: overlay_mapped_address (PC, SECTION)
2451 Returns the address corresponding to PC in the mapped (runtime) range.
2452 May be the same as PC. */
2455 overlay_mapped_address (pc
, section
)
2459 if (overlay_debugging
)
2460 if (section
&& section_is_overlay (section
) &&
2461 pc_in_unmapped_range (pc
, section
))
2462 return pc
+ section
->vma
- section
->lma
;
2468 /* Function: symbol_overlayed_address
2469 Return one of two addresses (relative to the VMA or to the LMA),
2470 depending on whether the section is mapped or not. */
2473 symbol_overlayed_address (address
, section
)
2477 if (overlay_debugging
)
2479 /* If the symbol has no section, just return its regular address. */
2482 /* If the symbol's section is not an overlay, just return its address */
2483 if (!section_is_overlay (section
))
2485 /* If the symbol's section is mapped, just return its address */
2486 if (section_is_mapped (section
))
2489 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
2490 * then return its LOADED address rather than its vma address!!
2492 return overlay_unmapped_address (address
, section
);
2497 /* Function: find_pc_overlay (PC)
2498 Return the best-match overlay section for PC:
2499 If PC matches a mapped overlay section's VMA, return that section.
2500 Else if PC matches an unmapped section's VMA, return that section.
2501 Else if PC matches an unmapped section's LMA, return that section. */
2504 find_pc_overlay (pc
)
2507 struct objfile
*objfile
;
2508 struct obj_section
*osect
, *best_match
= NULL
;
2510 if (overlay_debugging
)
2511 ALL_OBJSECTIONS (objfile
, osect
)
2512 if (section_is_overlay (osect
->the_bfd_section
))
2514 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
))
2516 if (overlay_is_mapped (osect
))
2517 return osect
->the_bfd_section
;
2521 else if (pc_in_unmapped_range (pc
, osect
->the_bfd_section
))
2524 return best_match
? best_match
->the_bfd_section
: NULL
;
2527 /* Function: find_pc_mapped_section (PC)
2528 If PC falls into the VMA address range of an overlay section that is
2529 currently marked as MAPPED, return that section. Else return NULL. */
2532 find_pc_mapped_section (pc
)
2535 struct objfile
*objfile
;
2536 struct obj_section
*osect
;
2538 if (overlay_debugging
)
2539 ALL_OBJSECTIONS (objfile
, osect
)
2540 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
) &&
2541 overlay_is_mapped (osect
))
2542 return osect
->the_bfd_section
;
2547 /* Function: list_overlays_command
2548 Print a list of mapped sections and their PC ranges */
2551 list_overlays_command (args
, from_tty
)
2556 struct objfile
*objfile
;
2557 struct obj_section
*osect
;
2559 if (overlay_debugging
)
2560 ALL_OBJSECTIONS (objfile
, osect
)
2561 if (overlay_is_mapped (osect
))
2567 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
2568 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
2569 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
2570 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
2572 printf_filtered ("Section %s, loaded at ", name
);
2573 print_address_numeric (lma
, 1, gdb_stdout
);
2574 puts_filtered (" - ");
2575 print_address_numeric (lma
+ size
, 1, gdb_stdout
);
2576 printf_filtered (", mapped at ");
2577 print_address_numeric (vma
, 1, gdb_stdout
);
2578 puts_filtered (" - ");
2579 print_address_numeric (vma
+ size
, 1, gdb_stdout
);
2580 puts_filtered ("\n");
2585 printf_filtered ("No sections are mapped.\n");
2588 /* Function: map_overlay_command
2589 Mark the named section as mapped (ie. residing at its VMA address). */
2592 map_overlay_command (args
, from_tty
)
2596 struct objfile
*objfile
, *objfile2
;
2597 struct obj_section
*sec
, *sec2
;
2600 if (!overlay_debugging
)
2601 error ("Overlay debugging not enabled. Use the 'OVERLAY ON' command.");
2603 if (args
== 0 || *args
== 0)
2604 error ("Argument required: name of an overlay section");
2606 /* First, find a section matching the user supplied argument */
2607 ALL_OBJSECTIONS (objfile
, sec
)
2608 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
2610 /* Now, check to see if the section is an overlay. */
2611 bfdsec
= sec
->the_bfd_section
;
2612 if (!section_is_overlay (bfdsec
))
2613 continue; /* not an overlay section */
2615 /* Mark the overlay as "mapped" */
2616 sec
->ovly_mapped
= 1;
2618 /* Next, make a pass and unmap any sections that are
2619 overlapped by this new section: */
2620 ALL_OBJSECTIONS (objfile2
, sec2
)
2621 if (sec2
->ovly_mapped
&&
2623 sec
->the_bfd_section
!= sec2
->the_bfd_section
&&
2624 (pc_in_mapped_range (sec2
->addr
, sec
->the_bfd_section
) ||
2625 pc_in_mapped_range (sec2
->endaddr
, sec
->the_bfd_section
)))
2628 printf_filtered ("Note: section %s unmapped by overlap\n",
2629 bfd_section_name (objfile
->obfd
,
2630 sec2
->the_bfd_section
));
2631 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
2635 error ("No overlay section called %s", args
);
2638 /* Function: unmap_overlay_command
2639 Mark the overlay section as unmapped
2640 (ie. resident in its LMA address range, rather than the VMA range). */
2643 unmap_overlay_command (args
, from_tty
)
2647 struct objfile
*objfile
;
2648 struct obj_section
*sec
;
2650 if (!overlay_debugging
)
2651 error ("Overlay debugging not enabled. Use the 'OVERLAY ON' command.");
2653 if (args
== 0 || *args
== 0)
2654 error ("Argument required: name of an overlay section");
2656 /* First, find a section matching the user supplied argument */
2657 ALL_OBJSECTIONS (objfile
, sec
)
2658 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
2660 if (!sec
->ovly_mapped
)
2661 error ("Section %s is not mapped", args
);
2662 sec
->ovly_mapped
= 0;
2665 error ("No overlay section called %s", args
);
2668 /* Function: overlay_auto_command
2669 A utility command to turn on overlay debugging.
2670 Possibly this should be done via a set/show command. */
2673 overlay_auto_command (args
, from_tty
)
2677 overlay_debugging
= -1;
2679 printf_filtered ("Automatic overlay debugging enabled.");
2682 /* Function: overlay_manual_command
2683 A utility command to turn on overlay debugging.
2684 Possibly this should be done via a set/show command. */
2687 overlay_manual_command (args
, from_tty
)
2691 overlay_debugging
= 1;
2693 printf_filtered ("Overlay debugging enabled.");
2696 /* Function: overlay_off_command
2697 A utility command to turn on overlay debugging.
2698 Possibly this should be done via a set/show command. */
2701 overlay_off_command (args
, from_tty
)
2705 overlay_debugging
= 0;
2707 printf_filtered ("Overlay debugging disabled.");
2711 overlay_load_command (args
, from_tty
)
2715 if (target_overlay_update
)
2716 (*target_overlay_update
) (NULL
);
2718 error ("This target does not know how to read its overlay state.");
2721 /* Function: overlay_command
2722 A place-holder for a mis-typed command */
2724 /* Command list chain containing all defined "overlay" subcommands. */
2725 struct cmd_list_element
*overlaylist
;
2728 overlay_command (args
, from_tty
)
2733 ("\"overlay\" must be followed by the name of an overlay command.\n");
2734 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
2738 /* Target Overlays for the "Simplest" overlay manager:
2740 This is GDB's default target overlay layer. It works with the
2741 minimal overlay manager supplied as an example by Cygnus. The
2742 entry point is via a function pointer "target_overlay_update",
2743 so targets that use a different runtime overlay manager can
2744 substitute their own overlay_update function and take over the
2747 The overlay_update function pokes around in the target's data structures
2748 to see what overlays are mapped, and updates GDB's overlay mapping with
2751 In this simple implementation, the target data structures are as follows:
2752 unsigned _novlys; /# number of overlay sections #/
2753 unsigned _ovly_table[_novlys][4] = {
2754 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
2755 {..., ..., ..., ...},
2757 unsigned _novly_regions; /# number of overlay regions #/
2758 unsigned _ovly_region_table[_novly_regions][3] = {
2759 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
2762 These functions will attempt to update GDB's mappedness state in the
2763 symbol section table, based on the target's mappedness state.
2765 To do this, we keep a cached copy of the target's _ovly_table, and
2766 attempt to detect when the cached copy is invalidated. The main
2767 entry point is "simple_overlay_update(SECT), which looks up SECT in
2768 the cached table and re-reads only the entry for that section from
2769 the target (whenever possible).
2772 /* Cached, dynamically allocated copies of the target data structures: */
2773 static unsigned (*cache_ovly_table
)[4] = 0;
2775 static unsigned (*cache_ovly_region_table
)[3] = 0;
2777 static unsigned cache_novlys
= 0;
2779 static unsigned cache_novly_regions
= 0;
2781 static CORE_ADDR cache_ovly_table_base
= 0;
2783 static CORE_ADDR cache_ovly_region_table_base
= 0;
2787 VMA
, SIZE
, LMA
, MAPPED
2789 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
2791 /* Throw away the cached copy of _ovly_table */
2793 simple_free_overlay_table ()
2795 if (cache_ovly_table
)
2796 free (cache_ovly_table
);
2798 cache_ovly_table
= NULL
;
2799 cache_ovly_table_base
= 0;
2803 /* Throw away the cached copy of _ovly_region_table */
2805 simple_free_overlay_region_table ()
2807 if (cache_ovly_region_table
)
2808 free (cache_ovly_region_table
);
2809 cache_novly_regions
= 0;
2810 cache_ovly_region_table
= NULL
;
2811 cache_ovly_region_table_base
= 0;
2815 /* Read an array of ints from the target into a local buffer.
2816 Convert to host order. int LEN is number of ints */
2818 read_target_long_array (memaddr
, myaddr
, len
)
2820 unsigned int *myaddr
;
2823 char *buf
= alloca (len
* TARGET_LONG_BYTES
);
2826 read_memory (memaddr
, buf
, len
* TARGET_LONG_BYTES
);
2827 for (i
= 0; i
< len
; i
++)
2828 myaddr
[i
] = extract_unsigned_integer (TARGET_LONG_BYTES
* i
+ buf
,
2832 /* Find and grab a copy of the target _ovly_table
2833 (and _novlys, which is needed for the table's size) */
2835 simple_read_overlay_table ()
2837 struct minimal_symbol
*msym
;
2839 simple_free_overlay_table ();
2840 msym
= lookup_minimal_symbol ("_novlys", 0, 0);
2842 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
2844 return 0; /* failure */
2845 cache_ovly_table
= (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
2846 if (cache_ovly_table
!= NULL
)
2848 msym
= lookup_minimal_symbol ("_ovly_table", 0, 0);
2851 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
2852 read_target_long_array (cache_ovly_table_base
,
2853 (int *) cache_ovly_table
,
2857 return 0; /* failure */
2860 return 0; /* failure */
2861 return 1; /* SUCCESS */
2865 /* Find and grab a copy of the target _ovly_region_table
2866 (and _novly_regions, which is needed for the table's size) */
2868 simple_read_overlay_region_table ()
2870 struct minimal_symbol
*msym
;
2872 simple_free_overlay_region_table ();
2873 msym
= lookup_minimal_symbol ("_novly_regions", 0, 0);
2875 cache_novly_regions
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
2877 return 0; /* failure */
2878 cache_ovly_region_table
= (void *) xmalloc (cache_novly_regions
* 12);
2879 if (cache_ovly_region_table
!= NULL
)
2881 msym
= lookup_minimal_symbol ("_ovly_region_table", 0, 0);
2884 cache_ovly_region_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
2885 read_target_long_array (cache_ovly_region_table_base
,
2886 (int *) cache_ovly_region_table
,
2887 cache_novly_regions
* 3);
2890 return 0; /* failure */
2893 return 0; /* failure */
2894 return 1; /* SUCCESS */
2898 /* Function: simple_overlay_update_1
2899 A helper function for simple_overlay_update. Assuming a cached copy
2900 of _ovly_table exists, look through it to find an entry whose vma,
2901 lma and size match those of OSECT. Re-read the entry and make sure
2902 it still matches OSECT (else the table may no longer be valid).
2903 Set OSECT's mapped state to match the entry. Return: 1 for
2904 success, 0 for failure. */
2907 simple_overlay_update_1 (osect
)
2908 struct obj_section
*osect
;
2912 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
2913 for (i
= 0; i
< cache_novlys
; i
++)
2914 if (cache_ovly_table
[i
][VMA
] == osect
->the_bfd_section
->vma
&&
2915 cache_ovly_table
[i
][LMA
] == osect
->the_bfd_section
->lma
/* &&
2916 cache_ovly_table[i][SIZE] == size */ )
2918 read_target_long_array (cache_ovly_table_base
+ i
* TARGET_LONG_BYTES
,
2919 (int *) cache_ovly_table
[i
], 4);
2920 if (cache_ovly_table
[i
][VMA
] == osect
->the_bfd_section
->vma
&&
2921 cache_ovly_table
[i
][LMA
] == osect
->the_bfd_section
->lma
/* &&
2922 cache_ovly_table[i][SIZE] == size */ )
2924 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
2927 else /* Warning! Warning! Target's ovly table has changed! */
2933 /* Function: simple_overlay_update
2934 If OSECT is NULL, then update all sections' mapped state
2935 (after re-reading the entire target _ovly_table).
2936 If OSECT is non-NULL, then try to find a matching entry in the
2937 cached ovly_table and update only OSECT's mapped state.
2938 If a cached entry can't be found or the cache isn't valid, then
2939 re-read the entire cache, and go ahead and update all sections. */
2942 simple_overlay_update (osect
)
2943 struct obj_section
*osect
;
2945 struct objfile
*objfile
;
2947 /* Were we given an osect to look up? NULL means do all of them. */
2949 /* Have we got a cached copy of the target's overlay table? */
2950 if (cache_ovly_table
!= NULL
)
2951 /* Does its cached location match what's currently in the symtab? */
2952 if (cache_ovly_table_base
==
2953 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", 0, 0)))
2954 /* Then go ahead and try to look up this single section in the cache */
2955 if (simple_overlay_update_1 (osect
))
2956 /* Found it! We're done. */
2959 /* Cached table no good: need to read the entire table anew.
2960 Or else we want all the sections, in which case it's actually
2961 more efficient to read the whole table in one block anyway. */
2963 if (simple_read_overlay_table () == 0) /* read failed? No table? */
2965 warning ("Failed to read the target overlay mapping table.");
2968 /* Now may as well update all sections, even if only one was requested. */
2969 ALL_OBJSECTIONS (objfile
, osect
)
2970 if (section_is_overlay (osect
->the_bfd_section
))
2974 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
2975 for (i
= 0; i
< cache_novlys
; i
++)
2976 if (cache_ovly_table
[i
][VMA
] == osect
->the_bfd_section
->vma
&&
2977 cache_ovly_table
[i
][LMA
] == osect
->the_bfd_section
->lma
/* &&
2978 cache_ovly_table[i][SIZE] == size */ )
2979 { /* obj_section matches i'th entry in ovly_table */
2980 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
2981 break; /* finished with inner for loop: break out */
2988 _initialize_symfile ()
2990 struct cmd_list_element
*c
;
2992 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
,
2993 "Load symbol table from executable file FILE.\n\
2994 The `file' command can also load symbol tables, as well as setting the file\n\
2995 to execute.", &cmdlist
);
2996 c
->completer
= filename_completer
;
2998 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
,
2999 "Usage: add-symbol-file FILE ADDR\n\
3000 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3001 ADDR is the starting address of the file's text.",
3003 c
->completer
= filename_completer
;
3005 c
= add_cmd ("add-shared-symbol-files", class_files
,
3006 add_shared_symbol_files_command
,
3007 "Load the symbols from shared objects in the dynamic linker's link map.",
3009 c
= add_alias_cmd ("assf", "add-shared-symbol-files", class_files
, 1,
3012 c
= add_cmd ("load", class_files
, load_command
,
3013 "Dynamically load FILE into the running program, and record its symbols\n\
3014 for access from GDB.", &cmdlist
);
3015 c
->completer
= filename_completer
;
3018 (add_set_cmd ("symbol-reloading", class_support
, var_boolean
,
3019 (char *) &symbol_reloading
,
3020 "Set dynamic symbol table reloading multiple times in one run.",
3024 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3025 "Commands for debugging overlays.", &overlaylist
,
3026 "overlay ", 0, &cmdlist
);
3028 add_com_alias ("ovly", "overlay", class_alias
, 1);
3029 add_com_alias ("ov", "overlay", class_alias
, 1);
3031 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3032 "Assert that an overlay section is mapped.", &overlaylist
);
3034 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3035 "Assert that an overlay section is unmapped.", &overlaylist
);
3037 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3038 "List mappings of overlay sections.", &overlaylist
);
3040 add_cmd ("manual", class_support
, overlay_manual_command
,
3041 "Enable overlay debugging.", &overlaylist
);
3042 add_cmd ("off", class_support
, overlay_off_command
,
3043 "Disable overlay debugging.", &overlaylist
);
3044 add_cmd ("auto", class_support
, overlay_auto_command
,
3045 "Enable automatic overlay debugging.", &overlaylist
);
3046 add_cmd ("load-target", class_support
, overlay_load_command
,
3047 "Read the overlay mapping state from the target.", &overlaylist
);
3049 /* Filename extension to source language lookup table: */
3050 init_filename_language_table ();
3051 c
= add_set_cmd ("extension-language", class_files
, var_string_noescape
,
3053 "Set mapping between filename extension and source language.\n\
3054 Usage: set extension-language .foo bar",
3056 c
->function
.cfunc
= set_ext_lang_command
;
3058 add_info ("extensions", info_ext_lang_command
,
3059 "All filename extensions associated with a source language.");