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"
55 /* Some HP-UX related globals to clear when a new "main"
56 symbol file is loaded. HP-specific. */
58 extern int hp_som_som_object_present
;
59 extern int hp_cxx_exception_support_initialized
;
60 #define RESET_HP_UX_GLOBALS() do {\
61 hp_som_som_object_present = 0; /* indicates HP-compiled code */ \
62 hp_cxx_exception_support_initialized = 0; /* must reinitialize exception stuff */ \
66 int (*ui_load_progress_hook
) PARAMS ((char *, unsigned long));
67 void (*pre_add_symbol_hook
) PARAMS ((char *));
68 void (*post_add_symbol_hook
) PARAMS ((void));
70 /* Global variables owned by this file */
71 int readnow_symbol_files
; /* Read full symbols immediately */
73 struct complaint oldsyms_complaint
=
75 "Replacing old symbols for `%s'", 0, 0
78 struct complaint empty_symtab_complaint
=
80 "Empty symbol table found for `%s'", 0, 0
83 /* External variables and functions referenced. */
85 extern int info_verbose
;
87 extern void report_transfer_performance
PARAMS ((unsigned long,
90 /* Functions this file defines */
93 static int simple_read_overlay_region_table
PARAMS ((void));
94 static void simple_free_overlay_region_table
PARAMS ((void));
97 static void set_initial_language
PARAMS ((void));
99 static void load_command
PARAMS ((char *, int));
101 static void add_symbol_file_command
PARAMS ((char *, int));
103 static void add_shared_symbol_files_command
PARAMS ((char *, int));
105 static void cashier_psymtab
PARAMS ((struct partial_symtab
*));
107 static int compare_psymbols
PARAMS ((const void *, const void *));
109 static int compare_symbols
PARAMS ((const void *, const void *));
111 bfd
*symfile_bfd_open
PARAMS ((char *));
113 static void find_sym_fns
PARAMS ((struct objfile
*));
115 static void decrement_reading_symtab
PARAMS ((void *));
117 static void overlay_invalidate_all
PARAMS ((void));
119 static int overlay_is_mapped
PARAMS ((struct obj_section
*));
121 void list_overlays_command
PARAMS ((char *, int));
123 void map_overlay_command
PARAMS ((char *, int));
125 void unmap_overlay_command
PARAMS ((char *, int));
127 static void overlay_auto_command
PARAMS ((char *, int));
129 static void overlay_manual_command
PARAMS ((char *, int));
131 static void overlay_off_command
PARAMS ((char *, int));
133 static void overlay_load_command
PARAMS ((char *, int));
135 static void overlay_command
PARAMS ((char *, int));
137 static void simple_free_overlay_table
PARAMS ((void));
139 static void read_target_long_array
PARAMS ((CORE_ADDR
, unsigned int *, int));
141 static int simple_read_overlay_table
PARAMS ((void));
143 static int simple_overlay_update_1
PARAMS ((struct obj_section
*));
145 static void add_filename_language
PARAMS ((char *ext
, enum language lang
));
147 static void set_ext_lang_command
PARAMS ((char *args
, int from_tty
));
149 static void info_ext_lang_command
PARAMS ((char *args
, int from_tty
));
151 static void init_filename_language_table
PARAMS ((void));
153 void _initialize_symfile
PARAMS ((void));
155 /* List of all available sym_fns. On gdb startup, each object file reader
156 calls add_symtab_fns() to register information on each format it is
159 static struct sym_fns
*symtab_fns
= NULL
;
161 /* Flag for whether user will be reloading symbols multiple times.
162 Defaults to ON for VxWorks, otherwise OFF. */
164 #ifdef SYMBOL_RELOADING_DEFAULT
165 int symbol_reloading
= SYMBOL_RELOADING_DEFAULT
;
167 int symbol_reloading
= 0;
170 /* If non-zero, then on HP-UX (i.e., platforms that use somsolib.c),
171 this variable is interpreted as a threshhold. If adding a new
172 library's symbol table to those already known to the debugger would
173 exceed this threshhold, then the shlib's symbols are not added.
175 If non-zero on other platforms, shared library symbols will be added
176 automatically when the inferior is created, new libraries are loaded,
177 or when attaching to the inferior. This is almost always what users
178 will want to have happen; but for very large programs, the startup
179 time will be excessive, and so if this is a problem, the user can
180 clear this flag and then add the shared library symbols as needed.
181 Note that there is a potential for confusion, since if the shared
182 library symbols are not loaded, commands like "info fun" will *not*
183 report all the functions that are actually present.
185 Note that HP-UX interprets this variable to mean, "threshhold size
186 in megabytes, where zero means never add". Other platforms interpret
187 this variable to mean, "always add if non-zero, never add if zero."
190 int auto_solib_add
= 1;
193 /* Since this function is called from within qsort, in an ANSI environment
194 it must conform to the prototype for qsort, which specifies that the
195 comparison function takes two "void *" pointers. */
198 compare_symbols (s1p
, s2p
)
202 register struct symbol
**s1
, **s2
;
204 s1
= (struct symbol
**) s1p
;
205 s2
= (struct symbol
**) s2p
;
207 return (STRCMP (SYMBOL_NAME (*s1
), SYMBOL_NAME (*s2
)));
214 compare_psymbols -- compare two partial symbols by name
218 Given pointers to pointers to two partial symbol table entries,
219 compare them by name and return -N, 0, or +N (ala strcmp).
220 Typically used by sorting routines like qsort().
224 Does direct compare of first two characters before punting
225 and passing to strcmp for longer compares. Note that the
226 original version had a bug whereby two null strings or two
227 identically named one character strings would return the
228 comparison of memory following the null byte.
233 compare_psymbols (s1p
, s2p
)
237 register char *st1
= SYMBOL_NAME (*(struct partial_symbol
**) s1p
);
238 register char *st2
= SYMBOL_NAME (*(struct partial_symbol
**) s2p
);
240 if ((st1
[0] - st2
[0]) || !st1
[0])
242 return (st1
[0] - st2
[0]);
244 else if ((st1
[1] - st2
[1]) || !st1
[1])
246 return (st1
[1] - st2
[1]);
250 /* Note: I replaced the STRCMP line (commented out below)
251 * with a simpler "strcmp()" which compares the 2 strings
252 * from the beginning. (STRCMP is a macro which first compares
253 * the initial characters, then falls back on strcmp).
254 * The reason is that the STRCMP line was tickling a C compiler
255 * bug on HP-UX 10.30, which is avoided with the simpler
256 * code. The performance gain from the more complicated code
257 * is negligible, given that we have already checked the
258 * initial 2 characters above. I reported the compiler bug,
259 * and once it is fixed the original line can be put back. RT
261 /* return ( STRCMP (st1 + 2, st2 + 2)); */
262 return (strcmp (st1
, st2
));
267 sort_pst_symbols (pst
)
268 struct partial_symtab
*pst
;
270 /* Sort the global list; don't sort the static list */
272 qsort (pst
->objfile
->global_psymbols
.list
+ pst
->globals_offset
,
273 pst
->n_global_syms
, sizeof (struct partial_symbol
*),
277 /* Call sort_block_syms to sort alphabetically the symbols of one block. */
281 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. */
292 register struct symtab
*s
;
294 register struct blockvector
*bv
;
297 register struct block
*b
;
301 bv
= BLOCKVECTOR (s
);
302 nbl
= BLOCKVECTOR_NBLOCKS (bv
);
303 for (i
= 0; i
< nbl
; i
++)
305 b
= BLOCKVECTOR_BLOCK (bv
, i
);
306 if (BLOCK_SHOULD_SORT (b
))
311 /* Make a null terminated copy of the string at PTR with SIZE characters in
312 the obstack pointed to by OBSTACKP . Returns the address of the copy.
313 Note that the string at PTR does not have to be null terminated, I.E. it
314 may be part of a larger string and we are only saving a substring. */
317 obsavestring (ptr
, size
, obstackp
)
320 struct obstack
*obstackp
;
322 register char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
323 /* Open-coded memcpy--saves function call time. These strings are usually
324 short. FIXME: Is this really still true with a compiler that can
327 register char *p1
= ptr
;
328 register char *p2
= p
;
329 char *end
= ptr
+ size
;
337 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
338 in the obstack pointed to by OBSTACKP. */
341 obconcat (obstackp
, s1
, s2
, s3
)
342 struct obstack
*obstackp
;
343 const char *s1
, *s2
, *s3
;
345 register int len
= strlen (s1
) + strlen (s2
) + strlen (s3
) + 1;
346 register char *val
= (char *) obstack_alloc (obstackp
, len
);
353 /* True if we are nested inside psymtab_to_symtab. */
355 int currently_reading_symtab
= 0;
358 decrement_reading_symtab (dummy
)
361 currently_reading_symtab
--;
364 /* Get the symbol table that corresponds to a partial_symtab.
365 This is fast after the first time you do it. In fact, there
366 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
370 psymtab_to_symtab (pst
)
371 register struct partial_symtab
*pst
;
373 /* If it's been looked up before, return it. */
377 /* If it has not yet been read in, read it. */
380 struct cleanup
*back_to
= make_cleanup (decrement_reading_symtab
, NULL
);
381 currently_reading_symtab
++;
382 (*pst
->read_symtab
) (pst
);
383 do_cleanups (back_to
);
389 /* Initialize entry point information for this objfile. */
392 init_entry_point_info (objfile
)
393 struct objfile
*objfile
;
395 /* Save startup file's range of PC addresses to help blockframe.c
396 decide where the bottom of the stack is. */
398 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
400 /* Executable file -- record its entry point so we'll recognize
401 the startup file because it contains the entry point. */
402 objfile
->ei
.entry_point
= bfd_get_start_address (objfile
->obfd
);
406 /* Examination of non-executable.o files. Short-circuit this stuff. */
407 objfile
->ei
.entry_point
= INVALID_ENTRY_POINT
;
409 objfile
->ei
.entry_file_lowpc
= INVALID_ENTRY_LOWPC
;
410 objfile
->ei
.entry_file_highpc
= INVALID_ENTRY_HIGHPC
;
411 objfile
->ei
.entry_func_lowpc
= INVALID_ENTRY_LOWPC
;
412 objfile
->ei
.entry_func_highpc
= INVALID_ENTRY_HIGHPC
;
413 objfile
->ei
.main_func_lowpc
= INVALID_ENTRY_LOWPC
;
414 objfile
->ei
.main_func_highpc
= INVALID_ENTRY_HIGHPC
;
417 /* Get current entry point address. */
420 entry_point_address ()
422 return symfile_objfile
? symfile_objfile
->ei
.entry_point
: 0;
425 /* Remember the lowest-addressed loadable section we've seen.
426 This function is called via bfd_map_over_sections.
428 In case of equal vmas, the section with the largest size becomes the
429 lowest-addressed loadable section.
431 If the vmas and sizes are equal, the last section is considered the
432 lowest-addressed loadable section. */
435 find_lowest_section (abfd
, sect
, obj
)
440 asection
**lowest
= (asection
**) obj
;
442 if (0 == (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
))
445 *lowest
= sect
; /* First loadable section */
446 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
447 *lowest
= sect
; /* A lower loadable section */
448 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
449 && (bfd_section_size (abfd
, (*lowest
))
450 <= bfd_section_size (abfd
, sect
)))
454 /* Parse the user's idea of an offset for dynamic linking, into our idea
455 of how to represent it for fast symbol reading. This is the default
456 version of the sym_fns.sym_offsets function for symbol readers that
457 don't need to do anything special. It allocates a section_offsets table
458 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
461 default_symfile_offsets (objfile
, addr
)
462 struct objfile
*objfile
;
467 objfile
->num_sections
= SECT_OFF_MAX
;
468 objfile
->section_offsets
= (struct section_offsets
*)
469 obstack_alloc (&objfile
->psymbol_obstack
, SIZEOF_SECTION_OFFSETS
);
470 memset (objfile
->section_offsets
, 0, SIZEOF_SECTION_OFFSETS
);
472 for (i
= 0; i
< SECT_OFF_MAX
; i
++)
473 ANOFFSET (objfile
->section_offsets
, i
) = addr
;
477 /* Process a symbol file, as either the main file or as a dynamically
480 OBJFILE is where the symbols are to be read from.
482 ADDR is the address where the text segment was loaded, unless the
483 objfile is the main symbol file, in which case it is zero.
485 MAINLINE is nonzero if this is the main symbol file, or zero if
486 it's an extra symbol file such as dynamically loaded code.
488 VERBO is nonzero if the caller has printed a verbose message about
489 the symbol reading (and complaints can be more terse about it). */
492 syms_from_objfile (objfile
, addr
, mainline
, verbo
)
493 struct objfile
*objfile
;
498 struct section_offsets
*section_offsets
;
499 asection
*lowest_sect
;
500 struct cleanup
*old_chain
;
502 init_entry_point_info (objfile
);
503 find_sym_fns (objfile
);
505 /* Make sure that partially constructed symbol tables will be cleaned up
506 if an error occurs during symbol reading. */
507 old_chain
= make_cleanup ((make_cleanup_func
) free_objfile
, objfile
);
511 /* We will modify the main symbol table, make sure that all its users
512 will be cleaned up if an error occurs during symbol reading. */
513 make_cleanup ((make_cleanup_func
) clear_symtab_users
, 0);
515 /* Since no error yet, throw away the old symbol table. */
517 if (symfile_objfile
!= NULL
)
519 free_objfile (symfile_objfile
);
520 symfile_objfile
= NULL
;
523 /* Currently we keep symbols from the add-symbol-file command.
524 If the user wants to get rid of them, they should do "symbol-file"
525 without arguments first. Not sure this is the best behavior
528 (*objfile
->sf
->sym_new_init
) (objfile
);
531 /* Convert addr into an offset rather than an absolute address.
532 We find the lowest address of a loaded segment in the objfile,
533 and assume that <addr> is where that got loaded.
535 We no longer warn if the lowest section is not a text segment (as
536 happens for the PA64 port. */
539 addr
= 0; /* No offset from objfile addresses. */
543 lowest_sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
544 if (lowest_sect
== NULL
)
545 bfd_map_over_sections (objfile
->obfd
, find_lowest_section
,
548 if (lowest_sect
== NULL
)
549 warning ("no loadable sections found in added symbol-file %s",
553 addr
-= bfd_section_vma (objfile
->obfd
, lowest_sect
);
556 /* Initialize symbol reading routines for this objfile, allow complaints to
557 appear for this new file, and record how verbose to be, then do the
558 initial symbol reading for this file. */
560 (*objfile
->sf
->sym_init
) (objfile
);
561 clear_complaints (1, verbo
);
563 (*objfile
->sf
->sym_offsets
) (objfile
, addr
);
565 #ifndef IBM6000_TARGET
566 /* This is a SVR4/SunOS specific hack, I think. In any event, it
567 screws RS/6000. sym_offsets should be doing this sort of thing,
568 because it knows the mapping between bfd sections and
570 /* This is a hack. As far as I can tell, section offsets are not
571 target dependent. They are all set to addr with a couple of
572 exceptions. The exceptions are sysvr4 shared libraries, whose
573 offsets are kept in solib structures anyway and rs6000 xcoff
574 which handles shared libraries in a completely unique way.
576 Section offsets are built similarly, except that they are built
577 by adding addr in all cases because there is no clear mapping
578 from section_offsets into actual sections. Note that solib.c
579 has a different algorithm for finding section offsets.
581 These should probably all be collapsed into some target
582 independent form of shared library support. FIXME. */
586 struct obj_section
*s
;
588 ALL_OBJFILE_OSECTIONS (objfile
, s
)
590 s
->addr
-= s
->offset
;
592 s
->endaddr
-= s
->offset
;
597 #endif /* not IBM6000_TARGET */
599 (*objfile
->sf
->sym_read
) (objfile
, mainline
);
601 if (!have_partial_symbols () && !have_full_symbols ())
604 printf_filtered ("(no debugging symbols found)...");
608 /* Don't allow char * to have a typename (else would get caddr_t).
609 Ditto void *. FIXME: Check whether this is now done by all the
610 symbol readers themselves (many of them now do), and if so remove
613 TYPE_NAME (lookup_pointer_type (builtin_type_char
)) = 0;
614 TYPE_NAME (lookup_pointer_type (builtin_type_void
)) = 0;
616 /* Mark the objfile has having had initial symbol read attempted. Note
617 that this does not mean we found any symbols... */
619 objfile
->flags
|= OBJF_SYMS
;
621 /* Discard cleanups as symbol reading was successful. */
623 discard_cleanups (old_chain
);
625 /* Call this after reading in a new symbol table to give target
626 dependant code a crack at the new symbols. For instance, this
627 could be used to update the values of target-specific symbols GDB
628 needs to keep track of (such as _sigtramp, or whatever). */
630 TARGET_SYMFILE_POSTREAD (objfile
);
633 /* Perform required actions after either reading in the initial
634 symbols for a new objfile, or mapping in the symbols from a reusable
638 new_symfile_objfile (objfile
, mainline
, verbo
)
639 struct objfile
*objfile
;
644 /* If this is the main symbol file we have to clean up all users of the
645 old main symbol file. Otherwise it is sufficient to fixup all the
646 breakpoints that may have been redefined by this symbol file. */
649 /* OK, make it the "real" symbol file. */
650 symfile_objfile
= objfile
;
652 clear_symtab_users ();
656 breakpoint_re_set ();
659 /* We're done reading the symbol file; finish off complaints. */
660 clear_complaints (0, verbo
);
663 /* Process a symbol file, as either the main file or as a dynamically
666 NAME is the file name (which will be tilde-expanded and made
667 absolute herein) (but we don't free or modify NAME itself).
668 FROM_TTY says how verbose to be. MAINLINE specifies whether this
669 is the main symbol file, or whether it's an extra symbol file such
670 as dynamically loaded code. If !mainline, ADDR is the address
671 where the text segment was loaded.
673 USER_LOADED is TRUE if the add-symbol-file command was how this
674 symbol file came to be processed.
676 IS_SOLIB is TRUE if this symbol file represents a solib, as discovered
677 by the target's implementation of the solib package.
679 Upon success, returns a pointer to the objfile that was added.
680 Upon failure, jumps back to command level (never returns). */
683 symbol_file_add (name
, from_tty
, addr
, mainline
, mapped
, readnow
, user_loaded
, is_solib
)
693 struct objfile
*objfile
;
694 struct partial_symtab
*psymtab
;
697 /* Open a bfd for the file, and give user a chance to burp if we'd be
698 interactively wiping out any existing symbols. */
700 abfd
= symfile_bfd_open (name
);
702 if ((have_full_symbols () || have_partial_symbols ())
705 && !query ("Load new symbol table from \"%s\"? ", name
))
706 error ("Not confirmed.");
708 objfile
= allocate_objfile (abfd
, mapped
, user_loaded
, is_solib
);
710 /* If the objfile uses a mapped symbol file, and we have a psymtab for
711 it, then skip reading any symbols at this time. */
713 if ((objfile
->flags
& OBJF_MAPPED
) && (objfile
->flags
& OBJF_SYMS
))
715 /* We mapped in an existing symbol table file that already has had
716 initial symbol reading performed, so we can skip that part. Notify
717 the user that instead of reading the symbols, they have been mapped.
719 if (from_tty
|| info_verbose
)
721 printf_filtered ("Mapped symbols for %s...", name
);
723 gdb_flush (gdb_stdout
);
725 init_entry_point_info (objfile
);
726 find_sym_fns (objfile
);
730 /* We either created a new mapped symbol table, mapped an existing
731 symbol table file which has not had initial symbol reading
732 performed, or need to read an unmapped symbol table. */
733 if (from_tty
|| info_verbose
)
735 if (pre_add_symbol_hook
)
736 pre_add_symbol_hook (name
);
739 printf_filtered ("Reading symbols from %s...", name
);
741 gdb_flush (gdb_stdout
);
744 syms_from_objfile (objfile
, addr
, mainline
, from_tty
);
747 /* We now have at least a partial symbol table. Check to see if the
748 user requested that all symbols be read on initial access via either
749 the gdb startup command line or on a per symbol file basis. Expand
750 all partial symbol tables for this objfile if so. */
752 if (readnow
|| readnow_symbol_files
)
754 if (from_tty
|| info_verbose
)
756 printf_filtered ("expanding to full symbols...");
758 gdb_flush (gdb_stdout
);
761 for (psymtab
= objfile
->psymtabs
;
763 psymtab
= psymtab
->next
)
765 psymtab_to_symtab (psymtab
);
769 if (from_tty
|| info_verbose
)
771 if (post_add_symbol_hook
)
772 post_add_symbol_hook ();
775 printf_filtered ("done.\n");
776 gdb_flush (gdb_stdout
);
780 new_symfile_objfile (objfile
, mainline
, from_tty
);
782 target_new_objfile (objfile
);
787 /* This is the symbol-file command. Read the file, analyze its
788 symbols, and add a struct symtab to a symtab list. The syntax of
789 the command is rather bizarre--(1) buildargv implements various
790 quoting conventions which are undocumented and have little or
791 nothing in common with the way things are quoted (or not quoted)
792 elsewhere in GDB, (2) options are used, which are not generally
793 used in GDB (perhaps "set mapped on", "set readnow on" would be
794 better), (3) the order of options matters, which is contrary to GNU
795 conventions (because it is confusing and inconvenient). */
798 symbol_file_command (args
, from_tty
)
804 CORE_ADDR text_relocation
= 0; /* text_relocation */
805 struct cleanup
*cleanups
;
813 if ((have_full_symbols () || have_partial_symbols ())
815 && !query ("Discard symbol table from `%s'? ",
816 symfile_objfile
->name
))
817 error ("Not confirmed.");
818 free_all_objfiles ();
820 /* solib descriptors may have handles to objfiles. Since their
821 storage has just been released, we'd better wipe the solib
824 #if defined(SOLIB_RESTART)
828 symfile_objfile
= NULL
;
831 printf_unfiltered ("No symbol file now.\n");
834 RESET_HP_UX_GLOBALS ();
839 if ((argv
= buildargv (args
)) == NULL
)
843 cleanups
= make_cleanup_freeargv (argv
);
844 while (*argv
!= NULL
)
846 if (STREQ (*argv
, "-mapped"))
850 else if (STREQ (*argv
, "-readnow"))
854 else if (**argv
== '-')
856 error ("unknown option `%s'", *argv
);
864 /* this is for rombug remote only, to get the text relocation by
865 using link command */
866 p
= strrchr (name
, '/');
872 target_link (p
, &text_relocation
);
874 if (text_relocation
== (CORE_ADDR
) 0)
876 else if (text_relocation
== (CORE_ADDR
) -1)
878 symbol_file_add (name
, from_tty
, (CORE_ADDR
) 0,
879 1, mapped
, readnow
, 1, 0);
881 RESET_HP_UX_GLOBALS ();
885 symbol_file_add (name
, from_tty
, (CORE_ADDR
) text_relocation
,
886 0, mapped
, readnow
, 1, 0);
888 /* Getting new symbols may change our opinion about what is
890 reinit_frame_cache ();
892 set_initial_language ();
899 error ("no symbol file name was specified");
901 TUIDO (((TuiOpaqueFuncPtr
) tuiDisplayMainFunction
));
902 do_cleanups (cleanups
);
906 /* Set the initial language.
908 A better solution would be to record the language in the psymtab when reading
909 partial symbols, and then use it (if known) to set the language. This would
910 be a win for formats that encode the language in an easily discoverable place,
911 such as DWARF. For stabs, we can jump through hoops looking for specially
912 named symbols or try to intuit the language from the specific type of stabs
913 we find, but we can't do that until later when we read in full symbols.
917 set_initial_language ()
919 struct partial_symtab
*pst
;
920 enum language lang
= language_unknown
;
922 pst
= find_main_psymtab ();
925 if (pst
->filename
!= NULL
)
927 lang
= deduce_language_from_filename (pst
->filename
);
929 if (lang
== language_unknown
)
931 /* Make C the default language */
935 expected_language
= current_language
; /* Don't warn the user */
939 /* Open file specified by NAME and hand it off to BFD for preliminary
940 analysis. Result is a newly initialized bfd *, which includes a newly
941 malloc'd` copy of NAME (tilde-expanded and made absolute).
942 In case of trouble, error() is called. */
945 symfile_bfd_open (name
)
954 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy */
956 /* Look down path for it, allocate 2nd new malloc'd copy. */
957 desc
= openp (getenv ("PATH"), 1, name
, O_RDONLY
| O_BINARY
, 0, &absolute_name
);
958 #if defined(__GO32__) || defined(_WIN32)
961 char *exename
= alloca (strlen (name
) + 5);
962 strcat (strcpy (exename
, name
), ".exe");
963 desc
= openp (getenv ("PATH"), 1, exename
, O_RDONLY
| O_BINARY
,
969 make_cleanup (free
, name
);
970 perror_with_name (name
);
972 free (name
); /* Free 1st new malloc'd copy */
973 name
= absolute_name
; /* Keep 2nd malloc'd copy in bfd */
974 /* It'll be freed in free_objfile(). */
976 sym_bfd
= bfd_fdopenr (name
, gnutarget
, desc
);
980 make_cleanup (free
, name
);
981 error ("\"%s\": can't open to read symbols: %s.", name
,
982 bfd_errmsg (bfd_get_error ()));
984 sym_bfd
->cacheable
= true;
986 if (!bfd_check_format (sym_bfd
, bfd_object
))
988 /* FIXME: should be checking for errors from bfd_close (for one thing,
989 on error it does not free all the storage associated with the
991 bfd_close (sym_bfd
); /* This also closes desc */
992 make_cleanup (free
, name
);
993 error ("\"%s\": can't read symbols: %s.", name
,
994 bfd_errmsg (bfd_get_error ()));
999 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1000 startup by the _initialize routine in each object file format reader,
1001 to register information about each format the the reader is prepared
1008 sf
->next
= symtab_fns
;
1013 /* Initialize to read symbols from the symbol file sym_bfd. It either
1014 returns or calls error(). The result is an initialized struct sym_fns
1015 in the objfile structure, that contains cached information about the
1019 find_sym_fns (objfile
)
1020 struct objfile
*objfile
;
1023 enum bfd_flavour our_flavour
= bfd_get_flavour (objfile
->obfd
);
1024 char *our_target
= bfd_get_target (objfile
->obfd
);
1026 /* Special kludge for RS/6000 and PowerMac. See xcoffread.c. */
1027 if (STREQ (our_target
, "aixcoff-rs6000") ||
1028 STREQ (our_target
, "xcoff-powermac"))
1029 our_flavour
= (enum bfd_flavour
) -1;
1031 /* Special kludge for apollo. See dstread.c. */
1032 if (STREQN (our_target
, "apollo", 6))
1033 our_flavour
= (enum bfd_flavour
) -2;
1035 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
->next
)
1037 if (our_flavour
== sf
->sym_flavour
)
1043 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
1044 bfd_get_target (objfile
->obfd
));
1047 /* This function runs the load command of our current target. */
1050 load_command (arg
, from_tty
)
1055 arg
= get_exec_file (1);
1056 target_load (arg
, from_tty
);
1059 /* This version of "load" should be usable for any target. Currently
1060 it is just used for remote targets, not inftarg.c or core files,
1061 on the theory that only in that case is it useful.
1063 Avoiding xmodem and the like seems like a win (a) because we don't have
1064 to worry about finding it, and (b) On VMS, fork() is very slow and so
1065 we don't want to run a subprocess. On the other hand, I'm not sure how
1066 performance compares. */
1067 #define GENERIC_LOAD_CHUNK 256
1068 #define VALIDATE_DOWNLOAD 0
1070 generic_load (filename
, from_tty
)
1074 struct cleanup
*old_cleanups
;
1077 time_t start_time
, end_time
; /* Start and end times of download */
1078 unsigned long data_count
= 0; /* Number of bytes transferred to memory */
1080 unsigned long load_offset
= 0; /* offset to add to vma for each section */
1081 char buf
[GENERIC_LOAD_CHUNK
+ 8];
1082 #if VALIDATE_DOWNLOAD
1083 char verify_buffer
[GENERIC_LOAD_CHUNK
+ 8];
1086 /* enable user to specify address for downloading as 2nd arg to load */
1087 n
= sscanf (filename
, "%s 0x%lx", buf
, &load_offset
);
1093 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
1094 if (loadfile_bfd
== NULL
)
1096 perror_with_name (filename
);
1099 /* FIXME: should be checking for errors from bfd_close (for one thing,
1100 on error it does not free all the storage associated with the
1102 old_cleanups
= make_cleanup ((make_cleanup_func
) bfd_close
, loadfile_bfd
);
1104 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
1106 error ("\"%s\" is not an object file: %s", filename
,
1107 bfd_errmsg (bfd_get_error ()));
1110 start_time
= time (NULL
);
1112 for (s
= loadfile_bfd
->sections
; s
; s
= s
->next
)
1114 if (s
->flags
& SEC_LOAD
)
1118 size
= bfd_get_section_size_before_reloc (s
);
1122 struct cleanup
*old_chain
;
1124 unsigned long l
= size
;
1130 l
= l
> GENERIC_LOAD_CHUNK
? GENERIC_LOAD_CHUNK
: l
;
1132 buffer
= xmalloc (size
);
1133 old_chain
= make_cleanup (free
, buffer
);
1138 /* Is this really necessary? I guess it gives the user something
1139 to look at during a long download. */
1140 printf_filtered ("Loading section %s, size 0x%lx lma ",
1141 bfd_get_section_name (loadfile_bfd
, s
),
1142 (unsigned long) size
);
1143 print_address_numeric (lma
, 1, gdb_stdout
);
1144 printf_filtered ("\n");
1146 bfd_get_section_contents (loadfile_bfd
, s
, buffer
, 0, size
);
1148 sect
= (char *) bfd_get_section_name (loadfile_bfd
, s
);
1152 len
= (size
- sent
) < l
? (size
- sent
) : l
;
1154 err
= target_write_memory (lma
, buffer
, len
);
1155 if (ui_load_progress_hook
)
1156 if (ui_load_progress_hook (sect
, sent
))
1157 error ("Canceled the download");
1158 #if VALIDATE_DOWNLOAD
1159 /* Broken memories and broken monitors manifest themselves
1160 here when bring new computers to life.
1161 This doubles already slow downloads.
1166 target_read_memory (lma
, verify_buffer
, len
);
1167 if (0 != bcmp (buffer
, verify_buffer
, len
))
1168 error ("Download verify failed at %08x",
1169 (unsigned long) lma
);
1177 while (err
== 0 && sent
< size
);
1180 error ("Memory access error while loading section %s.",
1181 bfd_get_section_name (loadfile_bfd
, s
));
1183 do_cleanups (old_chain
);
1188 end_time
= time (NULL
);
1190 unsigned long entry
;
1191 entry
= bfd_get_start_address (loadfile_bfd
);
1192 printf_filtered ("Start address 0x%lx , load size %ld\n", entry
, data_count
);
1193 /* We were doing this in remote-mips.c, I suspect it is right
1194 for other targets too. */
1198 /* FIXME: are we supposed to call symbol_file_add or not? According to
1199 a comment from remote-mips.c (where a call to symbol_file_add was
1200 commented out), making the call confuses GDB if more than one file is
1201 loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c
1204 report_transfer_performance (data_count
, start_time
, end_time
);
1206 do_cleanups (old_cleanups
);
1209 /* Report how fast the transfer went. */
1212 report_transfer_performance (data_count
, start_time
, end_time
)
1213 unsigned long data_count
;
1214 time_t start_time
, end_time
;
1216 printf_filtered ("Transfer rate: ");
1217 if (end_time
!= start_time
)
1218 printf_filtered ("%ld bits/sec",
1219 (data_count
* 8) / (end_time
- start_time
));
1221 printf_filtered ("%ld bits in <1 sec", (data_count
* 8));
1222 printf_filtered (".\n");
1225 /* This function allows the addition of incrementally linked object files.
1226 It does not modify any state in the target, only in the debugger. */
1230 add_symbol_file_command (args
, from_tty
)
1235 CORE_ADDR text_addr
;
1244 error ("add-symbol-file takes a file name and an address");
1247 /* Make a copy of the string that we can safely write into. */
1249 args
= strdup (args
);
1250 make_cleanup (free
, args
);
1252 /* Pick off any -option args and the file name. */
1254 while ((*args
!= '\000') && (name
== NULL
))
1256 while (isspace (*args
))
1261 while ((*args
!= '\000') && !isspace (*args
))
1265 if (*args
!= '\000')
1273 else if (STREQ (arg
, "-mapped"))
1277 else if (STREQ (arg
, "-readnow"))
1283 error ("unknown option `%s'", arg
);
1287 /* After picking off any options and the file name, args should be
1288 left pointing at the remainder of the command line, which should
1289 be the address expression to evaluate. */
1293 error ("add-symbol-file takes a file name");
1295 name
= tilde_expand (name
);
1296 make_cleanup (free
, name
);
1298 if (*args
!= '\000')
1300 text_addr
= parse_and_eval_address (args
);
1304 target_link (name
, &text_addr
);
1305 if (text_addr
== (CORE_ADDR
) -1)
1306 error ("Don't know how to get text start location for this file");
1309 /* FIXME-32x64: Assumes text_addr fits in a long. */
1311 && (!query ("add symbol table from file \"%s\" at text_addr = %s?\n",
1312 name
, local_hex_string ((unsigned long) text_addr
))))
1313 error ("Not confirmed.");
1315 symbol_file_add (name
, from_tty
, text_addr
, 0, mapped
, readnow
,
1316 1, /* user_loaded */
1317 0); /* We'll guess it's ! is_solib */
1319 /* Getting new symbols may change our opinion about what is
1321 reinit_frame_cache ();
1325 add_shared_symbol_files_command (args
, from_tty
)
1329 #ifdef ADD_SHARED_SYMBOL_FILES
1330 ADD_SHARED_SYMBOL_FILES (args
, from_tty
);
1332 error ("This command is not available in this configuration of GDB.");
1336 /* Re-read symbols if a symbol-file has changed. */
1340 struct objfile
*objfile
;
1343 struct stat new_statbuf
;
1346 /* With the addition of shared libraries, this should be modified,
1347 the load time should be saved in the partial symbol tables, since
1348 different tables may come from different source files. FIXME.
1349 This routine should then walk down each partial symbol table
1350 and see if the symbol table that it originates from has been changed */
1352 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
1356 #ifdef IBM6000_TARGET
1357 /* If this object is from a shared library, then you should
1358 stat on the library name, not member name. */
1360 if (objfile
->obfd
->my_archive
)
1361 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
1364 res
= stat (objfile
->name
, &new_statbuf
);
1367 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1368 printf_filtered ("`%s' has disappeared; keeping its symbols.\n",
1372 new_modtime
= new_statbuf
.st_mtime
;
1373 if (new_modtime
!= objfile
->mtime
)
1375 struct cleanup
*old_cleanups
;
1376 struct section_offsets
*offsets
;
1378 char *obfd_filename
;
1380 printf_filtered ("`%s' has changed; re-reading symbols.\n",
1383 /* There are various functions like symbol_file_add,
1384 symfile_bfd_open, syms_from_objfile, etc., which might
1385 appear to do what we want. But they have various other
1386 effects which we *don't* want. So we just do stuff
1387 ourselves. We don't worry about mapped files (for one thing,
1388 any mapped file will be out of date). */
1390 /* If we get an error, blow away this objfile (not sure if
1391 that is the correct response for things like shared
1393 old_cleanups
= make_cleanup ((make_cleanup_func
) free_objfile
,
1395 /* We need to do this whenever any symbols go away. */
1396 make_cleanup ((make_cleanup_func
) clear_symtab_users
, 0);
1398 /* Clean up any state BFD has sitting around. We don't need
1399 to close the descriptor but BFD lacks a way of closing the
1400 BFD without closing the descriptor. */
1401 obfd_filename
= bfd_get_filename (objfile
->obfd
);
1402 if (!bfd_close (objfile
->obfd
))
1403 error ("Can't close BFD for %s: %s", objfile
->name
,
1404 bfd_errmsg (bfd_get_error ()));
1405 objfile
->obfd
= bfd_openr (obfd_filename
, gnutarget
);
1406 if (objfile
->obfd
== NULL
)
1407 error ("Can't open %s to read symbols.", objfile
->name
);
1408 /* bfd_openr sets cacheable to true, which is what we want. */
1409 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
1410 error ("Can't read symbols from %s: %s.", objfile
->name
,
1411 bfd_errmsg (bfd_get_error ()));
1413 /* Save the offsets, we will nuke them with the rest of the
1415 num_offsets
= objfile
->num_sections
;
1416 offsets
= (struct section_offsets
*) alloca (SIZEOF_SECTION_OFFSETS
);
1417 memcpy (offsets
, objfile
->section_offsets
, SIZEOF_SECTION_OFFSETS
);
1419 /* Nuke all the state that we will re-read. Much of the following
1420 code which sets things to NULL really is necessary to tell
1421 other parts of GDB that there is nothing currently there. */
1423 /* FIXME: Do we have to free a whole linked list, or is this
1425 if (objfile
->global_psymbols
.list
)
1426 mfree (objfile
->md
, objfile
->global_psymbols
.list
);
1427 memset (&objfile
->global_psymbols
, 0,
1428 sizeof (objfile
->global_psymbols
));
1429 if (objfile
->static_psymbols
.list
)
1430 mfree (objfile
->md
, objfile
->static_psymbols
.list
);
1431 memset (&objfile
->static_psymbols
, 0,
1432 sizeof (objfile
->static_psymbols
));
1434 /* Free the obstacks for non-reusable objfiles */
1435 obstack_free (&objfile
->psymbol_cache
.cache
, 0);
1436 memset (&objfile
->psymbol_cache
, 0,
1437 sizeof (objfile
->psymbol_cache
));
1438 obstack_free (&objfile
->psymbol_obstack
, 0);
1439 obstack_free (&objfile
->symbol_obstack
, 0);
1440 obstack_free (&objfile
->type_obstack
, 0);
1441 objfile
->sections
= NULL
;
1442 objfile
->symtabs
= NULL
;
1443 objfile
->psymtabs
= NULL
;
1444 objfile
->free_psymtabs
= NULL
;
1445 objfile
->msymbols
= NULL
;
1446 objfile
->minimal_symbol_count
= 0;
1447 objfile
->fundamental_types
= NULL
;
1448 if (objfile
->sf
!= NULL
)
1450 (*objfile
->sf
->sym_finish
) (objfile
);
1453 /* We never make this a mapped file. */
1455 /* obstack_specify_allocation also initializes the obstack so
1457 obstack_specify_allocation (&objfile
->psymbol_cache
.cache
, 0, 0,
1459 obstack_specify_allocation (&objfile
->psymbol_obstack
, 0, 0,
1461 obstack_specify_allocation (&objfile
->symbol_obstack
, 0, 0,
1463 obstack_specify_allocation (&objfile
->type_obstack
, 0, 0,
1465 if (build_objfile_section_table (objfile
))
1467 error ("Can't find the file sections in `%s': %s",
1468 objfile
->name
, bfd_errmsg (bfd_get_error ()));
1471 /* We use the same section offsets as from last time. I'm not
1472 sure whether that is always correct for shared libraries. */
1473 objfile
->section_offsets
= (struct section_offsets
*)
1474 obstack_alloc (&objfile
->psymbol_obstack
, SIZEOF_SECTION_OFFSETS
);
1475 memcpy (objfile
->section_offsets
, offsets
, SIZEOF_SECTION_OFFSETS
);
1476 objfile
->num_sections
= num_offsets
;
1478 /* What the hell is sym_new_init for, anyway? The concept of
1479 distinguishing between the main file and additional files
1480 in this way seems rather dubious. */
1481 if (objfile
== symfile_objfile
)
1483 (*objfile
->sf
->sym_new_init
) (objfile
);
1485 RESET_HP_UX_GLOBALS ();
1489 (*objfile
->sf
->sym_init
) (objfile
);
1490 clear_complaints (1, 1);
1491 /* The "mainline" parameter is a hideous hack; I think leaving it
1492 zero is OK since dbxread.c also does what it needs to do if
1493 objfile->global_psymbols.size is 0. */
1494 (*objfile
->sf
->sym_read
) (objfile
, 0);
1495 if (!have_partial_symbols () && !have_full_symbols ())
1498 printf_filtered ("(no debugging symbols found)\n");
1501 objfile
->flags
|= OBJF_SYMS
;
1503 /* We're done reading the symbol file; finish off complaints. */
1504 clear_complaints (0, 1);
1506 /* Getting new symbols may change our opinion about what is
1509 reinit_frame_cache ();
1511 /* Discard cleanups as symbol reading was successful. */
1512 discard_cleanups (old_cleanups
);
1514 /* If the mtime has changed between the time we set new_modtime
1515 and now, we *want* this to be out of date, so don't call stat
1517 objfile
->mtime
= new_modtime
;
1520 /* Call this after reading in a new symbol table to give target
1521 dependant code a crack at the new symbols. For instance, this
1522 could be used to update the values of target-specific symbols GDB
1523 needs to keep track of (such as _sigtramp, or whatever). */
1525 TARGET_SYMFILE_POSTREAD (objfile
);
1531 clear_symtab_users ();
1543 static filename_language
*filename_language_table
;
1544 static int fl_table_size
, fl_table_next
;
1547 add_filename_language (ext
, lang
)
1551 if (fl_table_next
>= fl_table_size
)
1553 fl_table_size
+= 10;
1554 filename_language_table
= realloc (filename_language_table
,
1558 filename_language_table
[fl_table_next
].ext
= strsave (ext
);
1559 filename_language_table
[fl_table_next
].lang
= lang
;
1563 static char *ext_args
;
1566 set_ext_lang_command (args
, from_tty
)
1571 char *cp
= ext_args
;
1574 /* First arg is filename extension, starting with '.' */
1576 error ("'%s': Filename extension must begin with '.'", ext_args
);
1578 /* Find end of first arg. */
1579 while (*cp
&& !isspace (*cp
))
1583 error ("'%s': two arguments required -- filename extension and language",
1586 /* Null-terminate first arg */
1589 /* Find beginning of second arg, which should be a source language. */
1590 while (*cp
&& isspace (*cp
))
1594 error ("'%s': two arguments required -- filename extension and language",
1597 /* Lookup the language from among those we know. */
1598 lang
= language_enum (cp
);
1600 /* Now lookup the filename extension: do we already know it? */
1601 for (i
= 0; i
< fl_table_next
; i
++)
1602 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
1605 if (i
>= fl_table_next
)
1607 /* new file extension */
1608 add_filename_language (ext_args
, lang
);
1612 /* redefining a previously known filename extension */
1615 /* query ("Really make files of type %s '%s'?", */
1616 /* ext_args, language_str (lang)); */
1618 free (filename_language_table
[i
].ext
);
1619 filename_language_table
[i
].ext
= strsave (ext_args
);
1620 filename_language_table
[i
].lang
= lang
;
1625 info_ext_lang_command (args
, from_tty
)
1631 printf_filtered ("Filename extensions and the languages they represent:");
1632 printf_filtered ("\n\n");
1633 for (i
= 0; i
< fl_table_next
; i
++)
1634 printf_filtered ("\t%s\t- %s\n",
1635 filename_language_table
[i
].ext
,
1636 language_str (filename_language_table
[i
].lang
));
1640 init_filename_language_table ()
1642 if (fl_table_size
== 0) /* protect against repetition */
1646 filename_language_table
=
1647 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
1648 add_filename_language (".c", language_c
);
1649 add_filename_language (".C", language_cplus
);
1650 add_filename_language (".cc", language_cplus
);
1651 add_filename_language (".cp", language_cplus
);
1652 add_filename_language (".cpp", language_cplus
);
1653 add_filename_language (".cxx", language_cplus
);
1654 add_filename_language (".c++", language_cplus
);
1655 add_filename_language (".java", language_java
);
1656 add_filename_language (".class", language_java
);
1657 add_filename_language (".ch", language_chill
);
1658 add_filename_language (".c186", language_chill
);
1659 add_filename_language (".c286", language_chill
);
1660 add_filename_language (".f", language_fortran
);
1661 add_filename_language (".F", language_fortran
);
1662 add_filename_language (".s", language_asm
);
1663 add_filename_language (".S", language_asm
);
1668 deduce_language_from_filename (filename
)
1674 if (filename
!= NULL
)
1675 if ((cp
= strrchr (filename
, '.')) != NULL
)
1676 for (i
= 0; i
< fl_table_next
; i
++)
1677 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
1678 return filename_language_table
[i
].lang
;
1680 return language_unknown
;
1685 Allocate and partly initialize a new symbol table. Return a pointer
1686 to it. error() if no space.
1688 Caller must set these fields:
1694 possibly free_named_symtabs (symtab->filename);
1698 allocate_symtab (filename
, objfile
)
1700 struct objfile
*objfile
;
1702 register struct symtab
*symtab
;
1704 symtab
= (struct symtab
*)
1705 obstack_alloc (&objfile
->symbol_obstack
, sizeof (struct symtab
));
1706 memset (symtab
, 0, sizeof (*symtab
));
1707 symtab
->filename
= obsavestring (filename
, strlen (filename
),
1708 &objfile
->symbol_obstack
);
1709 symtab
->fullname
= NULL
;
1710 symtab
->language
= deduce_language_from_filename (filename
);
1711 symtab
->debugformat
= obsavestring ("unknown", 7,
1712 &objfile
->symbol_obstack
);
1714 /* Hook it to the objfile it comes from */
1716 symtab
->objfile
= objfile
;
1717 symtab
->next
= objfile
->symtabs
;
1718 objfile
->symtabs
= symtab
;
1720 /* FIXME: This should go away. It is only defined for the Z8000,
1721 and the Z8000 definition of this macro doesn't have anything to
1722 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
1723 here for convenience. */
1724 #ifdef INIT_EXTRA_SYMTAB_INFO
1725 INIT_EXTRA_SYMTAB_INFO (symtab
);
1731 struct partial_symtab
*
1732 allocate_psymtab (filename
, objfile
)
1734 struct objfile
*objfile
;
1736 struct partial_symtab
*psymtab
;
1738 if (objfile
->free_psymtabs
)
1740 psymtab
= objfile
->free_psymtabs
;
1741 objfile
->free_psymtabs
= psymtab
->next
;
1744 psymtab
= (struct partial_symtab
*)
1745 obstack_alloc (&objfile
->psymbol_obstack
,
1746 sizeof (struct partial_symtab
));
1748 memset (psymtab
, 0, sizeof (struct partial_symtab
));
1749 psymtab
->filename
= obsavestring (filename
, strlen (filename
),
1750 &objfile
->psymbol_obstack
);
1751 psymtab
->symtab
= NULL
;
1753 /* Prepend it to the psymtab list for the objfile it belongs to.
1754 Psymtabs are searched in most recent inserted -> least recent
1757 psymtab
->objfile
= objfile
;
1758 psymtab
->next
= objfile
->psymtabs
;
1759 objfile
->psymtabs
= psymtab
;
1762 struct partial_symtab
**prev_pst
;
1763 psymtab
->objfile
= objfile
;
1764 psymtab
->next
= NULL
;
1765 prev_pst
= &(objfile
->psymtabs
);
1766 while ((*prev_pst
) != NULL
)
1767 prev_pst
= &((*prev_pst
)->next
);
1768 (*prev_pst
) = psymtab
;
1776 discard_psymtab (pst
)
1777 struct partial_symtab
*pst
;
1779 struct partial_symtab
**prev_pst
;
1782 Empty psymtabs happen as a result of header files which don't
1783 have any symbols in them. There can be a lot of them. But this
1784 check is wrong, in that a psymtab with N_SLINE entries but
1785 nothing else is not empty, but we don't realize that. Fixing
1786 that without slowing things down might be tricky. */
1788 /* First, snip it out of the psymtab chain */
1790 prev_pst
= &(pst
->objfile
->psymtabs
);
1791 while ((*prev_pst
) != pst
)
1792 prev_pst
= &((*prev_pst
)->next
);
1793 (*prev_pst
) = pst
->next
;
1795 /* Next, put it on a free list for recycling */
1797 pst
->next
= pst
->objfile
->free_psymtabs
;
1798 pst
->objfile
->free_psymtabs
= pst
;
1802 /* Reset all data structures in gdb which may contain references to symbol
1806 clear_symtab_users ()
1808 /* Someday, we should do better than this, by only blowing away
1809 the things that really need to be blown. */
1810 clear_value_history ();
1812 clear_internalvars ();
1813 breakpoint_re_set ();
1814 set_default_breakpoint (0, 0, 0, 0);
1815 current_source_symtab
= 0;
1816 current_source_line
= 0;
1817 clear_pc_function_cache ();
1818 target_new_objfile (NULL
);
1821 /* clear_symtab_users_once:
1823 This function is run after symbol reading, or from a cleanup.
1824 If an old symbol table was obsoleted, the old symbol table
1825 has been blown away, but the other GDB data structures that may
1826 reference it have not yet been cleared or re-directed. (The old
1827 symtab was zapped, and the cleanup queued, in free_named_symtab()
1830 This function can be queued N times as a cleanup, or called
1831 directly; it will do all the work the first time, and then will be a
1832 no-op until the next time it is queued. This works by bumping a
1833 counter at queueing time. Much later when the cleanup is run, or at
1834 the end of symbol processing (in case the cleanup is discarded), if
1835 the queued count is greater than the "done-count", we do the work
1836 and set the done-count to the queued count. If the queued count is
1837 less than or equal to the done-count, we just ignore the call. This
1838 is needed because reading a single .o file will often replace many
1839 symtabs (one per .h file, for example), and we don't want to reset
1840 the breakpoints N times in the user's face.
1842 The reason we both queue a cleanup, and call it directly after symbol
1843 reading, is because the cleanup protects us in case of errors, but is
1844 discarded if symbol reading is successful. */
1847 /* FIXME: As free_named_symtabs is currently a big noop this function
1848 is no longer needed. */
1850 clear_symtab_users_once
PARAMS ((void));
1852 static int clear_symtab_users_queued
;
1853 static int clear_symtab_users_done
;
1856 clear_symtab_users_once ()
1858 /* Enforce once-per-`do_cleanups'-semantics */
1859 if (clear_symtab_users_queued
<= clear_symtab_users_done
)
1861 clear_symtab_users_done
= clear_symtab_users_queued
;
1863 clear_symtab_users ();
1867 /* Delete the specified psymtab, and any others that reference it. */
1870 cashier_psymtab (pst
)
1871 struct partial_symtab
*pst
;
1873 struct partial_symtab
*ps
, *pprev
= NULL
;
1876 /* Find its previous psymtab in the chain */
1877 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
1886 /* Unhook it from the chain. */
1887 if (ps
== pst
->objfile
->psymtabs
)
1888 pst
->objfile
->psymtabs
= ps
->next
;
1890 pprev
->next
= ps
->next
;
1892 /* FIXME, we can't conveniently deallocate the entries in the
1893 partial_symbol lists (global_psymbols/static_psymbols) that
1894 this psymtab points to. These just take up space until all
1895 the psymtabs are reclaimed. Ditto the dependencies list and
1896 filename, which are all in the psymbol_obstack. */
1898 /* We need to cashier any psymtab that has this one as a dependency... */
1900 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
1902 for (i
= 0; i
< ps
->number_of_dependencies
; i
++)
1904 if (ps
->dependencies
[i
] == pst
)
1906 cashier_psymtab (ps
);
1907 goto again
; /* Must restart, chain has been munged. */
1914 /* If a symtab or psymtab for filename NAME is found, free it along
1915 with any dependent breakpoints, displays, etc.
1916 Used when loading new versions of object modules with the "add-file"
1917 command. This is only called on the top-level symtab or psymtab's name;
1918 it is not called for subsidiary files such as .h files.
1920 Return value is 1 if we blew away the environment, 0 if not.
1921 FIXME. The return valu appears to never be used.
1923 FIXME. I think this is not the best way to do this. We should
1924 work on being gentler to the environment while still cleaning up
1925 all stray pointers into the freed symtab. */
1928 free_named_symtabs (name
)
1932 /* FIXME: With the new method of each objfile having it's own
1933 psymtab list, this function needs serious rethinking. In particular,
1934 why was it ever necessary to toss psymtabs with specific compilation
1935 unit filenames, as opposed to all psymtabs from a particular symbol
1937 Well, the answer is that some systems permit reloading of particular
1938 compilation units. We want to blow away any old info about these
1939 compilation units, regardless of which objfiles they arrived in. --gnu. */
1941 register struct symtab
*s
;
1942 register struct symtab
*prev
;
1943 register struct partial_symtab
*ps
;
1944 struct blockvector
*bv
;
1947 /* We only wack things if the symbol-reload switch is set. */
1948 if (!symbol_reloading
)
1951 /* Some symbol formats have trouble providing file names... */
1952 if (name
== 0 || *name
== '\0')
1955 /* Look for a psymtab with the specified name. */
1958 for (ps
= partial_symtab_list
; ps
; ps
= ps
->next
)
1960 if (STREQ (name
, ps
->filename
))
1962 cashier_psymtab (ps
); /* Blow it away...and its little dog, too. */
1963 goto again2
; /* Must restart, chain has been munged */
1967 /* Look for a symtab with the specified name. */
1969 for (s
= symtab_list
; s
; s
= s
->next
)
1971 if (STREQ (name
, s
->filename
))
1978 if (s
== symtab_list
)
1979 symtab_list
= s
->next
;
1981 prev
->next
= s
->next
;
1983 /* For now, queue a delete for all breakpoints, displays, etc., whether
1984 or not they depend on the symtab being freed. This should be
1985 changed so that only those data structures affected are deleted. */
1987 /* But don't delete anything if the symtab is empty.
1988 This test is necessary due to a bug in "dbxread.c" that
1989 causes empty symtabs to be created for N_SO symbols that
1990 contain the pathname of the object file. (This problem
1991 has been fixed in GDB 3.9x). */
1993 bv
= BLOCKVECTOR (s
);
1994 if (BLOCKVECTOR_NBLOCKS (bv
) > 2
1995 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
))
1996 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)))
1998 complain (&oldsyms_complaint
, name
);
2000 clear_symtab_users_queued
++;
2001 make_cleanup (clear_symtab_users_once
, 0);
2006 complain (&empty_symtab_complaint
, name
);
2013 /* It is still possible that some breakpoints will be affected
2014 even though no symtab was found, since the file might have
2015 been compiled without debugging, and hence not be associated
2016 with a symtab. In order to handle this correctly, we would need
2017 to keep a list of text address ranges for undebuggable files.
2018 For now, we do nothing, since this is a fairly obscure case. */
2022 /* FIXME, what about the minimal symbol table? */
2029 /* Allocate and partially fill a partial symtab. It will be
2030 completely filled at the end of the symbol list.
2032 FILENAME is the name of the symbol-file we are reading from. */
2034 struct partial_symtab
*
2035 start_psymtab_common (objfile
, section_offsets
,
2036 filename
, textlow
, global_syms
, static_syms
)
2037 struct objfile
*objfile
;
2038 struct section_offsets
*section_offsets
;
2041 struct partial_symbol
**global_syms
;
2042 struct partial_symbol
**static_syms
;
2044 struct partial_symtab
*psymtab
;
2046 psymtab
= allocate_psymtab (filename
, objfile
);
2047 psymtab
->section_offsets
= section_offsets
;
2048 psymtab
->textlow
= textlow
;
2049 psymtab
->texthigh
= psymtab
->textlow
; /* default */
2050 psymtab
->globals_offset
= global_syms
- objfile
->global_psymbols
.list
;
2051 psymtab
->statics_offset
= static_syms
- objfile
->static_psymbols
.list
;
2055 /* Add a symbol with a long value to a psymtab.
2056 Since one arg is a struct, we pass in a ptr and deref it (sigh). */
2059 add_psymbol_to_list (name
, namelength
, namespace, class, list
, val
, coreaddr
,
2063 namespace_enum
namespace;
2064 enum address_class
class;
2065 struct psymbol_allocation_list
*list
;
2066 long val
; /* Value as a long */
2067 CORE_ADDR coreaddr
; /* Value as a CORE_ADDR */
2068 enum language language
;
2069 struct objfile
*objfile
;
2071 register struct partial_symbol
*psym
;
2072 char *buf
= alloca (namelength
+ 1);
2073 /* psymbol is static so that there will be no uninitialized gaps in the
2074 structure which might contain random data, causing cache misses in
2076 static struct partial_symbol psymbol
;
2078 /* Create local copy of the partial symbol */
2079 memcpy (buf
, name
, namelength
);
2080 buf
[namelength
] = '\0';
2081 SYMBOL_NAME (&psymbol
) = bcache (buf
, namelength
+ 1, &objfile
->psymbol_cache
);
2082 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2085 SYMBOL_VALUE (&psymbol
) = val
;
2089 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2091 SYMBOL_SECTION (&psymbol
) = 0;
2092 SYMBOL_LANGUAGE (&psymbol
) = language
;
2093 PSYMBOL_NAMESPACE (&psymbol
) = namespace;
2094 PSYMBOL_CLASS (&psymbol
) = class;
2095 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2097 /* Stash the partial symbol away in the cache */
2098 psym
= bcache (&psymbol
, sizeof (struct partial_symbol
), &objfile
->psymbol_cache
);
2100 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2101 if (list
->next
>= list
->list
+ list
->size
)
2103 extend_psymbol_list (list
, objfile
);
2105 *list
->next
++ = psym
;
2106 OBJSTAT (objfile
, n_psyms
++);
2109 /* Add a symbol with a long value to a psymtab. This differs from
2110 * add_psymbol_to_list above in taking both a mangled and a demangled
2114 add_psymbol_with_dem_name_to_list (name
, namelength
, dem_name
, dem_namelength
,
2115 namespace, class, list
, val
, coreaddr
, language
, objfile
)
2120 namespace_enum
namespace;
2121 enum address_class
class;
2122 struct psymbol_allocation_list
*list
;
2123 long val
; /* Value as a long */
2124 CORE_ADDR coreaddr
; /* Value as a CORE_ADDR */
2125 enum language language
;
2126 struct objfile
*objfile
;
2128 register struct partial_symbol
*psym
;
2129 char *buf
= alloca (namelength
+ 1);
2130 /* psymbol is static so that there will be no uninitialized gaps in the
2131 structure which might contain random data, causing cache misses in
2133 static struct partial_symbol psymbol
;
2135 /* Create local copy of the partial symbol */
2137 memcpy (buf
, name
, namelength
);
2138 buf
[namelength
] = '\0';
2139 SYMBOL_NAME (&psymbol
) = bcache (buf
, namelength
+ 1, &objfile
->psymbol_cache
);
2141 buf
= alloca (dem_namelength
+ 1);
2142 memcpy (buf
, dem_name
, dem_namelength
);
2143 buf
[dem_namelength
] = '\0';
2148 case language_cplus
:
2149 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol
) =
2150 bcache (buf
, dem_namelength
+ 1, &objfile
->psymbol_cache
);
2152 case language_chill
:
2153 SYMBOL_CHILL_DEMANGLED_NAME (&psymbol
) =
2154 bcache (buf
, dem_namelength
+ 1, &objfile
->psymbol_cache
);
2156 /* FIXME What should be done for the default case? Ignoring for now. */
2159 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2162 SYMBOL_VALUE (&psymbol
) = val
;
2166 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2168 SYMBOL_SECTION (&psymbol
) = 0;
2169 SYMBOL_LANGUAGE (&psymbol
) = language
;
2170 PSYMBOL_NAMESPACE (&psymbol
) = namespace;
2171 PSYMBOL_CLASS (&psymbol
) = class;
2172 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2174 /* Stash the partial symbol away in the cache */
2175 psym
= bcache (&psymbol
, sizeof (struct partial_symbol
), &objfile
->psymbol_cache
);
2177 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2178 if (list
->next
>= list
->list
+ list
->size
)
2180 extend_psymbol_list (list
, objfile
);
2182 *list
->next
++ = psym
;
2183 OBJSTAT (objfile
, n_psyms
++);
2186 /* Initialize storage for partial symbols. */
2189 init_psymbol_list (objfile
, total_symbols
)
2190 struct objfile
*objfile
;
2193 /* Free any previously allocated psymbol lists. */
2195 if (objfile
->global_psymbols
.list
)
2197 mfree (objfile
->md
, (PTR
) objfile
->global_psymbols
.list
);
2199 if (objfile
->static_psymbols
.list
)
2201 mfree (objfile
->md
, (PTR
) objfile
->static_psymbols
.list
);
2204 /* Current best guess is that approximately a twentieth
2205 of the total symbols (in a debugging file) are global or static
2208 objfile
->global_psymbols
.size
= total_symbols
/ 10;
2209 objfile
->static_psymbols
.size
= total_symbols
/ 10;
2211 if (objfile
->global_psymbols
.size
> 0)
2213 objfile
->global_psymbols
.next
=
2214 objfile
->global_psymbols
.list
= (struct partial_symbol
**)
2215 xmmalloc (objfile
->md
, (objfile
->global_psymbols
.size
2216 * sizeof (struct partial_symbol
*)));
2218 if (objfile
->static_psymbols
.size
> 0)
2220 objfile
->static_psymbols
.next
=
2221 objfile
->static_psymbols
.list
= (struct partial_symbol
**)
2222 xmmalloc (objfile
->md
, (objfile
->static_psymbols
.size
2223 * sizeof (struct partial_symbol
*)));
2228 The following code implements an abstraction for debugging overlay sections.
2230 The target model is as follows:
2231 1) The gnu linker will permit multiple sections to be mapped into the
2232 same VMA, each with its own unique LMA (or load address).
2233 2) It is assumed that some runtime mechanism exists for mapping the
2234 sections, one by one, from the load address into the VMA address.
2235 3) This code provides a mechanism for gdb to keep track of which
2236 sections should be considered to be mapped from the VMA to the LMA.
2237 This information is used for symbol lookup, and memory read/write.
2238 For instance, if a section has been mapped then its contents
2239 should be read from the VMA, otherwise from the LMA.
2241 Two levels of debugger support for overlays are available. One is
2242 "manual", in which the debugger relies on the user to tell it which
2243 overlays are currently mapped. This level of support is
2244 implemented entirely in the core debugger, and the information about
2245 whether a section is mapped is kept in the objfile->obj_section table.
2247 The second level of support is "automatic", and is only available if
2248 the target-specific code provides functionality to read the target's
2249 overlay mapping table, and translate its contents for the debugger
2250 (by updating the mapped state information in the obj_section tables).
2252 The interface is as follows:
2254 overlay map <name> -- tell gdb to consider this section mapped
2255 overlay unmap <name> -- tell gdb to consider this section unmapped
2256 overlay list -- list the sections that GDB thinks are mapped
2257 overlay read-target -- get the target's state of what's mapped
2258 overlay off/manual/auto -- set overlay debugging state
2259 Functional interface:
2260 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2261 section, return that section.
2262 find_pc_overlay(pc): find any overlay section that contains
2263 the pc, either in its VMA or its LMA
2264 overlay_is_mapped(sect): true if overlay is marked as mapped
2265 section_is_overlay(sect): true if section's VMA != LMA
2266 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2267 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2268 overlay_mapped_address(...): map an address from section's LMA to VMA
2269 overlay_unmapped_address(...): map an address from section's VMA to LMA
2270 symbol_overlayed_address(...): Return a "current" address for symbol:
2271 either in VMA or LMA depending on whether
2272 the symbol's section is currently mapped
2275 /* Overlay debugging state: */
2277 int overlay_debugging
= 0; /* 0 == off, 1 == manual, -1 == auto */
2278 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
2280 /* Target vector for refreshing overlay mapped state */
2281 static void simple_overlay_update
PARAMS ((struct obj_section
*));
2282 void (*target_overlay_update
) PARAMS ((struct obj_section
*))
2283 = simple_overlay_update
;
2285 /* Function: section_is_overlay (SECTION)
2286 Returns true if SECTION has VMA not equal to LMA, ie.
2287 SECTION is loaded at an address different from where it will "run". */
2290 section_is_overlay (section
)
2293 if (overlay_debugging
)
2294 if (section
&& section
->lma
!= 0 &&
2295 section
->vma
!= section
->lma
)
2301 /* Function: overlay_invalidate_all (void)
2302 Invalidate the mapped state of all overlay sections (mark it as stale). */
2305 overlay_invalidate_all ()
2307 struct objfile
*objfile
;
2308 struct obj_section
*sect
;
2310 ALL_OBJSECTIONS (objfile
, sect
)
2311 if (section_is_overlay (sect
->the_bfd_section
))
2312 sect
->ovly_mapped
= -1;
2315 /* Function: overlay_is_mapped (SECTION)
2316 Returns true if section is an overlay, and is currently mapped.
2317 Private: public access is thru function section_is_mapped.
2319 Access to the ovly_mapped flag is restricted to this function, so
2320 that we can do automatic update. If the global flag
2321 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2322 overlay_invalidate_all. If the mapped state of the particular
2323 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2326 overlay_is_mapped (osect
)
2327 struct obj_section
*osect
;
2329 if (osect
== 0 || !section_is_overlay (osect
->the_bfd_section
))
2332 switch (overlay_debugging
)
2336 return 0; /* overlay debugging off */
2337 case -1: /* overlay debugging automatic */
2338 /* Unles there is a target_overlay_update function,
2339 there's really nothing useful to do here (can't really go auto) */
2340 if (target_overlay_update
)
2342 if (overlay_cache_invalid
)
2344 overlay_invalidate_all ();
2345 overlay_cache_invalid
= 0;
2347 if (osect
->ovly_mapped
== -1)
2348 (*target_overlay_update
) (osect
);
2350 /* fall thru to manual case */
2351 case 1: /* overlay debugging manual */
2352 return osect
->ovly_mapped
== 1;
2356 /* Function: section_is_mapped
2357 Returns true if section is an overlay, and is currently mapped. */
2360 section_is_mapped (section
)
2363 struct objfile
*objfile
;
2364 struct obj_section
*osect
;
2366 if (overlay_debugging
)
2367 if (section
&& section_is_overlay (section
))
2368 ALL_OBJSECTIONS (objfile
, osect
)
2369 if (osect
->the_bfd_section
== section
)
2370 return overlay_is_mapped (osect
);
2375 /* Function: pc_in_unmapped_range
2376 If PC falls into the lma range of SECTION, return true, else false. */
2379 pc_in_unmapped_range (pc
, section
)
2385 if (overlay_debugging
)
2386 if (section
&& section_is_overlay (section
))
2388 size
= bfd_get_section_size_before_reloc (section
);
2389 if (section
->lma
<= pc
&& pc
< section
->lma
+ size
)
2395 /* Function: pc_in_mapped_range
2396 If PC falls into the vma range of SECTION, return true, else false. */
2399 pc_in_mapped_range (pc
, section
)
2405 if (overlay_debugging
)
2406 if (section
&& section_is_overlay (section
))
2408 size
= bfd_get_section_size_before_reloc (section
);
2409 if (section
->vma
<= pc
&& pc
< section
->vma
+ size
)
2415 /* Function: overlay_unmapped_address (PC, SECTION)
2416 Returns the address corresponding to PC in the unmapped (load) range.
2417 May be the same as PC. */
2420 overlay_unmapped_address (pc
, section
)
2424 if (overlay_debugging
)
2425 if (section
&& section_is_overlay (section
) &&
2426 pc_in_mapped_range (pc
, section
))
2427 return pc
+ section
->lma
- section
->vma
;
2432 /* Function: overlay_mapped_address (PC, SECTION)
2433 Returns the address corresponding to PC in the mapped (runtime) range.
2434 May be the same as PC. */
2437 overlay_mapped_address (pc
, section
)
2441 if (overlay_debugging
)
2442 if (section
&& section_is_overlay (section
) &&
2443 pc_in_unmapped_range (pc
, section
))
2444 return pc
+ section
->vma
- section
->lma
;
2450 /* Function: symbol_overlayed_address
2451 Return one of two addresses (relative to the VMA or to the LMA),
2452 depending on whether the section is mapped or not. */
2455 symbol_overlayed_address (address
, section
)
2459 if (overlay_debugging
)
2461 /* If the symbol has no section, just return its regular address. */
2464 /* If the symbol's section is not an overlay, just return its address */
2465 if (!section_is_overlay (section
))
2467 /* If the symbol's section is mapped, just return its address */
2468 if (section_is_mapped (section
))
2471 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
2472 * then return its LOADED address rather than its vma address!!
2474 return overlay_unmapped_address (address
, section
);
2479 /* Function: find_pc_overlay (PC)
2480 Return the best-match overlay section for PC:
2481 If PC matches a mapped overlay section's VMA, return that section.
2482 Else if PC matches an unmapped section's VMA, return that section.
2483 Else if PC matches an unmapped section's LMA, return that section. */
2486 find_pc_overlay (pc
)
2489 struct objfile
*objfile
;
2490 struct obj_section
*osect
, *best_match
= NULL
;
2492 if (overlay_debugging
)
2493 ALL_OBJSECTIONS (objfile
, osect
)
2494 if (section_is_overlay (osect
->the_bfd_section
))
2496 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
))
2498 if (overlay_is_mapped (osect
))
2499 return osect
->the_bfd_section
;
2503 else if (pc_in_unmapped_range (pc
, osect
->the_bfd_section
))
2506 return best_match
? best_match
->the_bfd_section
: NULL
;
2509 /* Function: find_pc_mapped_section (PC)
2510 If PC falls into the VMA address range of an overlay section that is
2511 currently marked as MAPPED, return that section. Else return NULL. */
2514 find_pc_mapped_section (pc
)
2517 struct objfile
*objfile
;
2518 struct obj_section
*osect
;
2520 if (overlay_debugging
)
2521 ALL_OBJSECTIONS (objfile
, osect
)
2522 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
) &&
2523 overlay_is_mapped (osect
))
2524 return osect
->the_bfd_section
;
2529 /* Function: list_overlays_command
2530 Print a list of mapped sections and their PC ranges */
2533 list_overlays_command (args
, from_tty
)
2538 struct objfile
*objfile
;
2539 struct obj_section
*osect
;
2541 if (overlay_debugging
)
2542 ALL_OBJSECTIONS (objfile
, osect
)
2543 if (overlay_is_mapped (osect
))
2549 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
2550 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
2551 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
2552 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
2554 printf_filtered ("Section %s, loaded at ", name
);
2555 print_address_numeric (lma
, 1, gdb_stdout
);
2556 puts_filtered (" - ");
2557 print_address_numeric (lma
+ size
, 1, gdb_stdout
);
2558 printf_filtered (", mapped at ");
2559 print_address_numeric (vma
, 1, gdb_stdout
);
2560 puts_filtered (" - ");
2561 print_address_numeric (vma
+ size
, 1, gdb_stdout
);
2562 puts_filtered ("\n");
2567 printf_filtered ("No sections are mapped.\n");
2570 /* Function: map_overlay_command
2571 Mark the named section as mapped (ie. residing at its VMA address). */
2574 map_overlay_command (args
, from_tty
)
2578 struct objfile
*objfile
, *objfile2
;
2579 struct obj_section
*sec
, *sec2
;
2582 if (!overlay_debugging
)
2583 error ("Overlay debugging not enabled. Use the 'OVERLAY ON' command.");
2585 if (args
== 0 || *args
== 0)
2586 error ("Argument required: name of an overlay section");
2588 /* First, find a section matching the user supplied argument */
2589 ALL_OBJSECTIONS (objfile
, sec
)
2590 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
2592 /* Now, check to see if the section is an overlay. */
2593 bfdsec
= sec
->the_bfd_section
;
2594 if (!section_is_overlay (bfdsec
))
2595 continue; /* not an overlay section */
2597 /* Mark the overlay as "mapped" */
2598 sec
->ovly_mapped
= 1;
2600 /* Next, make a pass and unmap any sections that are
2601 overlapped by this new section: */
2602 ALL_OBJSECTIONS (objfile2
, sec2
)
2603 if (sec2
->ovly_mapped
&&
2605 sec
->the_bfd_section
!= sec2
->the_bfd_section
&&
2606 (pc_in_mapped_range (sec2
->addr
, sec
->the_bfd_section
) ||
2607 pc_in_mapped_range (sec2
->endaddr
, sec
->the_bfd_section
)))
2610 printf_filtered ("Note: section %s unmapped by overlap\n",
2611 bfd_section_name (objfile
->obfd
,
2612 sec2
->the_bfd_section
));
2613 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
2617 error ("No overlay section called %s", args
);
2620 /* Function: unmap_overlay_command
2621 Mark the overlay section as unmapped
2622 (ie. resident in its LMA address range, rather than the VMA range). */
2625 unmap_overlay_command (args
, from_tty
)
2629 struct objfile
*objfile
;
2630 struct obj_section
*sec
;
2632 if (!overlay_debugging
)
2633 error ("Overlay debugging not enabled. Use the 'OVERLAY ON' command.");
2635 if (args
== 0 || *args
== 0)
2636 error ("Argument required: name of an overlay section");
2638 /* First, find a section matching the user supplied argument */
2639 ALL_OBJSECTIONS (objfile
, sec
)
2640 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
2642 if (!sec
->ovly_mapped
)
2643 error ("Section %s is not mapped", args
);
2644 sec
->ovly_mapped
= 0;
2647 error ("No overlay section called %s", args
);
2650 /* Function: overlay_auto_command
2651 A utility command to turn on overlay debugging.
2652 Possibly this should be done via a set/show command. */
2655 overlay_auto_command (args
, from_tty
)
2659 overlay_debugging
= -1;
2661 printf_filtered ("Automatic overlay debugging enabled.");
2664 /* Function: overlay_manual_command
2665 A utility command to turn on overlay debugging.
2666 Possibly this should be done via a set/show command. */
2669 overlay_manual_command (args
, from_tty
)
2673 overlay_debugging
= 1;
2675 printf_filtered ("Overlay debugging enabled.");
2678 /* Function: overlay_off_command
2679 A utility command to turn on overlay debugging.
2680 Possibly this should be done via a set/show command. */
2683 overlay_off_command (args
, from_tty
)
2687 overlay_debugging
= 0;
2689 printf_filtered ("Overlay debugging disabled.");
2693 overlay_load_command (args
, from_tty
)
2697 if (target_overlay_update
)
2698 (*target_overlay_update
) (NULL
);
2700 error ("This target does not know how to read its overlay state.");
2703 /* Function: overlay_command
2704 A place-holder for a mis-typed command */
2706 /* Command list chain containing all defined "overlay" subcommands. */
2707 struct cmd_list_element
*overlaylist
;
2710 overlay_command (args
, from_tty
)
2715 ("\"overlay\" must be followed by the name of an overlay command.\n");
2716 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
2720 /* Target Overlays for the "Simplest" overlay manager:
2722 This is GDB's default target overlay layer. It works with the
2723 minimal overlay manager supplied as an example by Cygnus. The
2724 entry point is via a function pointer "target_overlay_update",
2725 so targets that use a different runtime overlay manager can
2726 substitute their own overlay_update function and take over the
2729 The overlay_update function pokes around in the target's data structures
2730 to see what overlays are mapped, and updates GDB's overlay mapping with
2733 In this simple implementation, the target data structures are as follows:
2734 unsigned _novlys; /# number of overlay sections #/
2735 unsigned _ovly_table[_novlys][4] = {
2736 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
2737 {..., ..., ..., ...},
2739 unsigned _novly_regions; /# number of overlay regions #/
2740 unsigned _ovly_region_table[_novly_regions][3] = {
2741 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
2744 These functions will attempt to update GDB's mappedness state in the
2745 symbol section table, based on the target's mappedness state.
2747 To do this, we keep a cached copy of the target's _ovly_table, and
2748 attempt to detect when the cached copy is invalidated. The main
2749 entry point is "simple_overlay_update(SECT), which looks up SECT in
2750 the cached table and re-reads only the entry for that section from
2751 the target (whenever possible).
2754 /* Cached, dynamically allocated copies of the target data structures: */
2755 static unsigned (*cache_ovly_table
)[4] = 0;
2757 static unsigned (*cache_ovly_region_table
)[3] = 0;
2759 static unsigned cache_novlys
= 0;
2761 static unsigned cache_novly_regions
= 0;
2763 static CORE_ADDR cache_ovly_table_base
= 0;
2765 static CORE_ADDR cache_ovly_region_table_base
= 0;
2769 VMA
, SIZE
, LMA
, MAPPED
2771 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
2773 /* Throw away the cached copy of _ovly_table */
2775 simple_free_overlay_table ()
2777 if (cache_ovly_table
)
2778 free (cache_ovly_table
);
2780 cache_ovly_table
= NULL
;
2781 cache_ovly_table_base
= 0;
2785 /* Throw away the cached copy of _ovly_region_table */
2787 simple_free_overlay_region_table ()
2789 if (cache_ovly_region_table
)
2790 free (cache_ovly_region_table
);
2791 cache_novly_regions
= 0;
2792 cache_ovly_region_table
= NULL
;
2793 cache_ovly_region_table_base
= 0;
2797 /* Read an array of ints from the target into a local buffer.
2798 Convert to host order. int LEN is number of ints */
2800 read_target_long_array (memaddr
, myaddr
, len
)
2802 unsigned int *myaddr
;
2805 char *buf
= alloca (len
* TARGET_LONG_BYTES
);
2808 read_memory (memaddr
, buf
, len
* TARGET_LONG_BYTES
);
2809 for (i
= 0; i
< len
; i
++)
2810 myaddr
[i
] = extract_unsigned_integer (TARGET_LONG_BYTES
* i
+ buf
,
2814 /* Find and grab a copy of the target _ovly_table
2815 (and _novlys, which is needed for the table's size) */
2817 simple_read_overlay_table ()
2819 struct minimal_symbol
*msym
;
2821 simple_free_overlay_table ();
2822 msym
= lookup_minimal_symbol ("_novlys", 0, 0);
2824 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
2826 return 0; /* failure */
2827 cache_ovly_table
= (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
2828 if (cache_ovly_table
!= NULL
)
2830 msym
= lookup_minimal_symbol ("_ovly_table", 0, 0);
2833 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
2834 read_target_long_array (cache_ovly_table_base
,
2835 (int *) cache_ovly_table
,
2839 return 0; /* failure */
2842 return 0; /* failure */
2843 return 1; /* SUCCESS */
2847 /* Find and grab a copy of the target _ovly_region_table
2848 (and _novly_regions, which is needed for the table's size) */
2850 simple_read_overlay_region_table ()
2852 struct minimal_symbol
*msym
;
2854 simple_free_overlay_region_table ();
2855 msym
= lookup_minimal_symbol ("_novly_regions", 0, 0);
2857 cache_novly_regions
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
2859 return 0; /* failure */
2860 cache_ovly_region_table
= (void *) xmalloc (cache_novly_regions
* 12);
2861 if (cache_ovly_region_table
!= NULL
)
2863 msym
= lookup_minimal_symbol ("_ovly_region_table", 0, 0);
2866 cache_ovly_region_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
2867 read_target_long_array (cache_ovly_region_table_base
,
2868 (int *) cache_ovly_region_table
,
2869 cache_novly_regions
* 3);
2872 return 0; /* failure */
2875 return 0; /* failure */
2876 return 1; /* SUCCESS */
2880 /* Function: simple_overlay_update_1
2881 A helper function for simple_overlay_update. Assuming a cached copy
2882 of _ovly_table exists, look through it to find an entry whose vma,
2883 lma and size match those of OSECT. Re-read the entry and make sure
2884 it still matches OSECT (else the table may no longer be valid).
2885 Set OSECT's mapped state to match the entry. Return: 1 for
2886 success, 0 for failure. */
2889 simple_overlay_update_1 (osect
)
2890 struct obj_section
*osect
;
2894 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
2895 for (i
= 0; i
< cache_novlys
; i
++)
2896 if (cache_ovly_table
[i
][VMA
] == osect
->the_bfd_section
->vma
&&
2897 cache_ovly_table
[i
][LMA
] == osect
->the_bfd_section
->lma
/* &&
2898 cache_ovly_table[i][SIZE] == size */ )
2900 read_target_long_array (cache_ovly_table_base
+ i
* TARGET_LONG_BYTES
,
2901 (int *) cache_ovly_table
[i
], 4);
2902 if (cache_ovly_table
[i
][VMA
] == osect
->the_bfd_section
->vma
&&
2903 cache_ovly_table
[i
][LMA
] == osect
->the_bfd_section
->lma
/* &&
2904 cache_ovly_table[i][SIZE] == size */ )
2906 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
2909 else /* Warning! Warning! Target's ovly table has changed! */
2915 /* Function: simple_overlay_update
2916 If OSECT is NULL, then update all sections' mapped state
2917 (after re-reading the entire target _ovly_table).
2918 If OSECT is non-NULL, then try to find a matching entry in the
2919 cached ovly_table and update only OSECT's mapped state.
2920 If a cached entry can't be found or the cache isn't valid, then
2921 re-read the entire cache, and go ahead and update all sections. */
2924 simple_overlay_update (osect
)
2925 struct obj_section
*osect
;
2927 struct objfile
*objfile
;
2929 /* Were we given an osect to look up? NULL means do all of them. */
2931 /* Have we got a cached copy of the target's overlay table? */
2932 if (cache_ovly_table
!= NULL
)
2933 /* Does its cached location match what's currently in the symtab? */
2934 if (cache_ovly_table_base
==
2935 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", 0, 0)))
2936 /* Then go ahead and try to look up this single section in the cache */
2937 if (simple_overlay_update_1 (osect
))
2938 /* Found it! We're done. */
2941 /* Cached table no good: need to read the entire table anew.
2942 Or else we want all the sections, in which case it's actually
2943 more efficient to read the whole table in one block anyway. */
2945 if (simple_read_overlay_table () == 0) /* read failed? No table? */
2947 warning ("Failed to read the target overlay mapping table.");
2950 /* Now may as well update all sections, even if only one was requested. */
2951 ALL_OBJSECTIONS (objfile
, osect
)
2952 if (section_is_overlay (osect
->the_bfd_section
))
2956 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
2957 for (i
= 0; i
< cache_novlys
; i
++)
2958 if (cache_ovly_table
[i
][VMA
] == osect
->the_bfd_section
->vma
&&
2959 cache_ovly_table
[i
][LMA
] == osect
->the_bfd_section
->lma
/* &&
2960 cache_ovly_table[i][SIZE] == size */ )
2961 { /* obj_section matches i'th entry in ovly_table */
2962 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
2963 break; /* finished with inner for loop: break out */
2970 _initialize_symfile ()
2972 struct cmd_list_element
*c
;
2974 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
,
2975 "Load symbol table from executable file FILE.\n\
2976 The `file' command can also load symbol tables, as well as setting the file\n\
2977 to execute.", &cmdlist
);
2978 c
->completer
= filename_completer
;
2980 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
,
2981 "Usage: add-symbol-file FILE ADDR\n\
2982 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
2983 ADDR is the starting address of the file's text.",
2985 c
->completer
= filename_completer
;
2987 c
= add_cmd ("add-shared-symbol-files", class_files
,
2988 add_shared_symbol_files_command
,
2989 "Load the symbols from shared objects in the dynamic linker's link map.",
2991 c
= add_alias_cmd ("assf", "add-shared-symbol-files", class_files
, 1,
2994 c
= add_cmd ("load", class_files
, load_command
,
2995 "Dynamically load FILE into the running program, and record its symbols\n\
2996 for access from GDB.", &cmdlist
);
2997 c
->completer
= filename_completer
;
3000 (add_set_cmd ("symbol-reloading", class_support
, var_boolean
,
3001 (char *) &symbol_reloading
,
3002 "Set dynamic symbol table reloading multiple times in one run.",
3006 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3007 "Commands for debugging overlays.", &overlaylist
,
3008 "overlay ", 0, &cmdlist
);
3010 add_com_alias ("ovly", "overlay", class_alias
, 1);
3011 add_com_alias ("ov", "overlay", class_alias
, 1);
3013 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3014 "Assert that an overlay section is mapped.", &overlaylist
);
3016 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3017 "Assert that an overlay section is unmapped.", &overlaylist
);
3019 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3020 "List mappings of overlay sections.", &overlaylist
);
3022 add_cmd ("manual", class_support
, overlay_manual_command
,
3023 "Enable overlay debugging.", &overlaylist
);
3024 add_cmd ("off", class_support
, overlay_off_command
,
3025 "Disable overlay debugging.", &overlaylist
);
3026 add_cmd ("auto", class_support
, overlay_auto_command
,
3027 "Enable automatic overlay debugging.", &overlaylist
);
3028 add_cmd ("load-target", class_support
, overlay_load_command
,
3029 "Read the overlay mapping state from the target.", &overlaylist
);
3031 /* Filename extension to source language lookup table: */
3032 init_filename_language_table ();
3033 c
= add_set_cmd ("extension-language", class_files
, var_string_noescape
,
3035 "Set mapping between filename extension and source language.\n\
3036 Usage: set extension-language .foo bar",
3038 c
->function
.cfunc
= set_ext_lang_command
;
3040 add_info ("extensions", info_ext_lang_command
,
3041 "All filename extensions associated with a source language.");