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 OBJFILE is where the symbols are to be read from.
488 ADDR is the address where the text segment was loaded, unless the
489 objfile is the main symbol file, in which case it is zero.
491 MAINLINE is nonzero if this is the main symbol file, or zero if
492 it's an extra symbol file such as dynamically loaded code.
494 VERBO is nonzero if the caller has printed a verbose message about
495 the symbol reading (and complaints can be more terse about it). */
498 syms_from_objfile (objfile
, addr
, mainline
, verbo
)
499 struct objfile
*objfile
;
504 struct section_offsets
*section_offsets
;
505 asection
*lowest_sect
;
506 struct cleanup
*old_chain
;
508 init_entry_point_info (objfile
);
509 find_sym_fns (objfile
);
511 /* Make sure that partially constructed symbol tables will be cleaned up
512 if an error occurs during symbol reading. */
513 old_chain
= make_cleanup ((make_cleanup_func
) free_objfile
, objfile
);
517 /* We will modify the main symbol table, make sure that all its users
518 will be cleaned up if an error occurs during symbol reading. */
519 make_cleanup ((make_cleanup_func
) clear_symtab_users
, 0);
521 /* Since no error yet, throw away the old symbol table. */
523 if (symfile_objfile
!= NULL
)
525 free_objfile (symfile_objfile
);
526 symfile_objfile
= NULL
;
529 /* Currently we keep symbols from the add-symbol-file command.
530 If the user wants to get rid of them, they should do "symbol-file"
531 without arguments first. Not sure this is the best behavior
534 (*objfile
->sf
->sym_new_init
) (objfile
);
537 /* Convert addr into an offset rather than an absolute address.
538 We find the lowest address of a loaded segment in the objfile,
539 and assume that <addr> is where that got loaded.
541 We no longer warn if the lowest section is not a text segment (as
542 happens for the PA64 port. */
545 addr
= 0; /* No offset from objfile addresses. */
549 lowest_sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
550 if (lowest_sect
== NULL
)
551 bfd_map_over_sections (objfile
->obfd
, find_lowest_section
,
554 if (lowest_sect
== NULL
)
555 warning ("no loadable sections found in added symbol-file %s",
559 addr
-= bfd_section_vma (objfile
->obfd
, lowest_sect
);
562 /* Initialize symbol reading routines for this objfile, allow complaints to
563 appear for this new file, and record how verbose to be, then do the
564 initial symbol reading for this file. */
566 (*objfile
->sf
->sym_init
) (objfile
);
567 clear_complaints (1, verbo
);
569 section_offsets
= (*objfile
->sf
->sym_offsets
) (objfile
, addr
);
570 objfile
->section_offsets
= section_offsets
;
572 #ifndef IBM6000_TARGET
573 /* This is a SVR4/SunOS specific hack, I think. In any event, it
574 screws RS/6000. sym_offsets should be doing this sort of thing,
575 because it knows the mapping between bfd sections and
577 /* This is a hack. As far as I can tell, section offsets are not
578 target dependent. They are all set to addr with a couple of
579 exceptions. The exceptions are sysvr4 shared libraries, whose
580 offsets are kept in solib structures anyway and rs6000 xcoff
581 which handles shared libraries in a completely unique way.
583 Section offsets are built similarly, except that they are built
584 by adding addr in all cases because there is no clear mapping
585 from section_offsets into actual sections. Note that solib.c
586 has a different algorithm for finding section offsets.
588 These should probably all be collapsed into some target
589 independent form of shared library support. FIXME. */
593 struct obj_section
*s
;
595 ALL_OBJFILE_OSECTIONS (objfile
, s
)
597 s
->addr
-= s
->offset
;
599 s
->endaddr
-= s
->offset
;
604 #endif /* not IBM6000_TARGET */
606 (*objfile
->sf
->sym_read
) (objfile
, mainline
);
608 if (!have_partial_symbols () && !have_full_symbols ())
611 printf_filtered ("(no debugging symbols found)...");
615 /* Don't allow char * to have a typename (else would get caddr_t).
616 Ditto void *. FIXME: Check whether this is now done by all the
617 symbol readers themselves (many of them now do), and if so remove
620 TYPE_NAME (lookup_pointer_type (builtin_type_char
)) = 0;
621 TYPE_NAME (lookup_pointer_type (builtin_type_void
)) = 0;
623 /* Mark the objfile has having had initial symbol read attempted. Note
624 that this does not mean we found any symbols... */
626 objfile
->flags
|= OBJF_SYMS
;
628 /* Discard cleanups as symbol reading was successful. */
630 discard_cleanups (old_chain
);
632 /* Call this after reading in a new symbol table to give target
633 dependant code a crack at the new symbols. For instance, this
634 could be used to update the values of target-specific symbols GDB
635 needs to keep track of (such as _sigtramp, or whatever). */
637 TARGET_SYMFILE_POSTREAD (objfile
);
640 /* Perform required actions after either reading in the initial
641 symbols for a new objfile, or mapping in the symbols from a reusable
645 new_symfile_objfile (objfile
, mainline
, verbo
)
646 struct objfile
*objfile
;
651 /* If this is the main symbol file we have to clean up all users of the
652 old main symbol file. Otherwise it is sufficient to fixup all the
653 breakpoints that may have been redefined by this symbol file. */
656 /* OK, make it the "real" symbol file. */
657 symfile_objfile
= objfile
;
659 clear_symtab_users ();
663 breakpoint_re_set ();
666 /* We're done reading the symbol file; finish off complaints. */
667 clear_complaints (0, verbo
);
670 /* Process a symbol file, as either the main file or as a dynamically
673 NAME is the file name (which will be tilde-expanded and made
674 absolute herein) (but we don't free or modify NAME itself).
675 FROM_TTY says how verbose to be. MAINLINE specifies whether this
676 is the main symbol file, or whether it's an extra symbol file such
677 as dynamically loaded code. If !mainline, ADDR is the address
678 where the text segment was loaded.
680 USER_LOADED is TRUE if the add-symbol-file command was how this
681 symbol file came to be processed.
683 IS_SOLIB is TRUE if this symbol file represents a solib, as discovered
684 by the target's implementation of the solib package.
686 Upon success, returns a pointer to the objfile that was added.
687 Upon failure, jumps back to command level (never returns). */
690 symbol_file_add (name
, from_tty
, addr
, mainline
, mapped
, readnow
, user_loaded
, is_solib
)
700 struct objfile
*objfile
;
701 struct partial_symtab
*psymtab
;
704 /* Open a bfd for the file, and give user a chance to burp if we'd be
705 interactively wiping out any existing symbols. */
707 abfd
= symfile_bfd_open (name
);
709 if ((have_full_symbols () || have_partial_symbols ())
712 && !query ("Load new symbol table from \"%s\"? ", name
))
713 error ("Not confirmed.");
715 objfile
= allocate_objfile (abfd
, mapped
, user_loaded
, is_solib
);
717 /* If the objfile uses a mapped symbol file, and we have a psymtab for
718 it, then skip reading any symbols at this time. */
720 if ((objfile
->flags
& OBJF_MAPPED
) && (objfile
->flags
& OBJF_SYMS
))
722 /* We mapped in an existing symbol table file that already has had
723 initial symbol reading performed, so we can skip that part. Notify
724 the user that instead of reading the symbols, they have been mapped.
726 if (from_tty
|| info_verbose
)
728 printf_filtered ("Mapped symbols for %s...", name
);
730 gdb_flush (gdb_stdout
);
732 init_entry_point_info (objfile
);
733 find_sym_fns (objfile
);
737 /* We either created a new mapped symbol table, mapped an existing
738 symbol table file which has not had initial symbol reading
739 performed, or need to read an unmapped symbol table. */
740 if (from_tty
|| info_verbose
)
742 if (pre_add_symbol_hook
)
743 pre_add_symbol_hook (name
);
746 printf_filtered ("Reading symbols from %s...", name
);
748 gdb_flush (gdb_stdout
);
751 syms_from_objfile (objfile
, addr
, mainline
, from_tty
);
754 /* We now have at least a partial symbol table. Check to see if the
755 user requested that all symbols be read on initial access via either
756 the gdb startup command line or on a per symbol file basis. Expand
757 all partial symbol tables for this objfile if so. */
759 if (readnow
|| readnow_symbol_files
)
761 if (from_tty
|| info_verbose
)
763 printf_filtered ("expanding to full symbols...");
765 gdb_flush (gdb_stdout
);
768 for (psymtab
= objfile
->psymtabs
;
770 psymtab
= psymtab
->next
)
772 psymtab_to_symtab (psymtab
);
776 if (from_tty
|| info_verbose
)
778 if (post_add_symbol_hook
)
779 post_add_symbol_hook ();
782 printf_filtered ("done.\n");
783 gdb_flush (gdb_stdout
);
787 new_symfile_objfile (objfile
, mainline
, from_tty
);
789 target_new_objfile (objfile
);
794 /* This is the symbol-file command. Read the file, analyze its
795 symbols, and add a struct symtab to a symtab list. The syntax of
796 the command is rather bizarre--(1) buildargv implements various
797 quoting conventions which are undocumented and have little or
798 nothing in common with the way things are quoted (or not quoted)
799 elsewhere in GDB, (2) options are used, which are not generally
800 used in GDB (perhaps "set mapped on", "set readnow on" would be
801 better), (3) the order of options matters, which is contrary to GNU
802 conventions (because it is confusing and inconvenient). */
805 symbol_file_command (args
, from_tty
)
811 CORE_ADDR text_relocation
= 0; /* text_relocation */
812 struct cleanup
*cleanups
;
820 if ((have_full_symbols () || have_partial_symbols ())
822 && !query ("Discard symbol table from `%s'? ",
823 symfile_objfile
->name
))
824 error ("Not confirmed.");
825 free_all_objfiles ();
827 /* solib descriptors may have handles to objfiles. Since their
828 storage has just been released, we'd better wipe the solib
831 #if defined(SOLIB_RESTART)
835 symfile_objfile
= NULL
;
838 printf_unfiltered ("No symbol file now.\n");
841 RESET_HP_UX_GLOBALS ();
846 if ((argv
= buildargv (args
)) == NULL
)
850 cleanups
= make_cleanup_freeargv (argv
);
851 while (*argv
!= NULL
)
853 if (STREQ (*argv
, "-mapped"))
857 else if (STREQ (*argv
, "-readnow"))
861 else if (**argv
== '-')
863 error ("unknown option `%s'", *argv
);
871 /* this is for rombug remote only, to get the text relocation by
872 using link command */
873 p
= strrchr (name
, '/');
879 target_link (p
, &text_relocation
);
881 if (text_relocation
== (CORE_ADDR
) 0)
883 else if (text_relocation
== (CORE_ADDR
) -1)
885 symbol_file_add (name
, from_tty
, (CORE_ADDR
) 0,
886 1, mapped
, readnow
, 1, 0);
888 RESET_HP_UX_GLOBALS ();
892 symbol_file_add (name
, from_tty
, (CORE_ADDR
) text_relocation
,
893 0, mapped
, readnow
, 1, 0);
895 /* Getting new symbols may change our opinion about what is
897 reinit_frame_cache ();
899 set_initial_language ();
906 error ("no symbol file name was specified");
908 TUIDO (((TuiOpaqueFuncPtr
) tuiDisplayMainFunction
));
909 do_cleanups (cleanups
);
913 /* Set the initial language.
915 A better solution would be to record the language in the psymtab when reading
916 partial symbols, and then use it (if known) to set the language. This would
917 be a win for formats that encode the language in an easily discoverable place,
918 such as DWARF. For stabs, we can jump through hoops looking for specially
919 named symbols or try to intuit the language from the specific type of stabs
920 we find, but we can't do that until later when we read in full symbols.
924 set_initial_language ()
926 struct partial_symtab
*pst
;
927 enum language lang
= language_unknown
;
929 pst
= find_main_psymtab ();
932 if (pst
->filename
!= NULL
)
934 lang
= deduce_language_from_filename (pst
->filename
);
936 if (lang
== language_unknown
)
938 /* Make C the default language */
942 expected_language
= current_language
; /* Don't warn the user */
946 /* Open file specified by NAME and hand it off to BFD for preliminary
947 analysis. Result is a newly initialized bfd *, which includes a newly
948 malloc'd` copy of NAME (tilde-expanded and made absolute).
949 In case of trouble, error() is called. */
952 symfile_bfd_open (name
)
961 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy */
963 /* Look down path for it, allocate 2nd new malloc'd copy. */
964 desc
= openp (getenv ("PATH"), 1, name
, O_RDONLY
| O_BINARY
, 0, &absolute_name
);
965 #if defined(__GO32__) || defined(_WIN32)
968 char *exename
= alloca (strlen (name
) + 5);
969 strcat (strcpy (exename
, name
), ".exe");
970 desc
= openp (getenv ("PATH"), 1, exename
, O_RDONLY
| O_BINARY
,
976 make_cleanup (free
, name
);
977 perror_with_name (name
);
979 free (name
); /* Free 1st new malloc'd copy */
980 name
= absolute_name
; /* Keep 2nd malloc'd copy in bfd */
981 /* It'll be freed in free_objfile(). */
983 sym_bfd
= bfd_fdopenr (name
, gnutarget
, desc
);
987 make_cleanup (free
, name
);
988 error ("\"%s\": can't open to read symbols: %s.", name
,
989 bfd_errmsg (bfd_get_error ()));
991 sym_bfd
->cacheable
= true;
993 if (!bfd_check_format (sym_bfd
, bfd_object
))
995 /* FIXME: should be checking for errors from bfd_close (for one thing,
996 on error it does not free all the storage associated with the
998 bfd_close (sym_bfd
); /* This also closes desc */
999 make_cleanup (free
, name
);
1000 error ("\"%s\": can't read symbols: %s.", name
,
1001 bfd_errmsg (bfd_get_error ()));
1006 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1007 startup by the _initialize routine in each object file format reader,
1008 to register information about each format the the reader is prepared
1015 sf
->next
= symtab_fns
;
1020 /* Initialize to read symbols from the symbol file sym_bfd. It either
1021 returns or calls error(). The result is an initialized struct sym_fns
1022 in the objfile structure, that contains cached information about the
1026 find_sym_fns (objfile
)
1027 struct objfile
*objfile
;
1030 enum bfd_flavour our_flavour
= bfd_get_flavour (objfile
->obfd
);
1031 char *our_target
= bfd_get_target (objfile
->obfd
);
1033 /* Special kludge for RS/6000 and PowerMac. See xcoffread.c. */
1034 if (STREQ (our_target
, "aixcoff-rs6000") ||
1035 STREQ (our_target
, "xcoff-powermac"))
1036 our_flavour
= (enum bfd_flavour
) -1;
1038 /* Special kludge for apollo. See dstread.c. */
1039 if (STREQN (our_target
, "apollo", 6))
1040 our_flavour
= (enum bfd_flavour
) -2;
1042 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
->next
)
1044 if (our_flavour
== sf
->sym_flavour
)
1050 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
1051 bfd_get_target (objfile
->obfd
));
1054 /* This function runs the load command of our current target. */
1057 load_command (arg
, from_tty
)
1062 arg
= get_exec_file (1);
1063 target_load (arg
, from_tty
);
1066 /* This version of "load" should be usable for any target. Currently
1067 it is just used for remote targets, not inftarg.c or core files,
1068 on the theory that only in that case is it useful.
1070 Avoiding xmodem and the like seems like a win (a) because we don't have
1071 to worry about finding it, and (b) On VMS, fork() is very slow and so
1072 we don't want to run a subprocess. On the other hand, I'm not sure how
1073 performance compares. */
1074 #define GENERIC_LOAD_CHUNK 256
1075 #define VALIDATE_DOWNLOAD 0
1077 generic_load (filename
, from_tty
)
1081 struct cleanup
*old_cleanups
;
1084 time_t start_time
, end_time
; /* Start and end times of download */
1085 unsigned long data_count
= 0; /* Number of bytes transferred to memory */
1087 unsigned long load_offset
= 0; /* offset to add to vma for each section */
1088 char buf
[GENERIC_LOAD_CHUNK
+ 8];
1089 #if VALIDATE_DOWNLOAD
1090 char verify_buffer
[GENERIC_LOAD_CHUNK
+ 8];
1093 /* enable user to specify address for downloading as 2nd arg to load */
1094 n
= sscanf (filename
, "%s 0x%lx", buf
, &load_offset
);
1100 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
1101 if (loadfile_bfd
== NULL
)
1103 perror_with_name (filename
);
1106 /* FIXME: should be checking for errors from bfd_close (for one thing,
1107 on error it does not free all the storage associated with the
1109 old_cleanups
= make_cleanup ((make_cleanup_func
) bfd_close
, loadfile_bfd
);
1111 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
1113 error ("\"%s\" is not an object file: %s", filename
,
1114 bfd_errmsg (bfd_get_error ()));
1117 start_time
= time (NULL
);
1119 for (s
= loadfile_bfd
->sections
; s
; s
= s
->next
)
1121 if (s
->flags
& SEC_LOAD
)
1125 size
= bfd_get_section_size_before_reloc (s
);
1129 struct cleanup
*old_chain
;
1131 unsigned long l
= size
;
1137 l
= l
> GENERIC_LOAD_CHUNK
? GENERIC_LOAD_CHUNK
: l
;
1139 buffer
= xmalloc (size
);
1140 old_chain
= make_cleanup (free
, buffer
);
1145 /* Is this really necessary? I guess it gives the user something
1146 to look at during a long download. */
1147 printf_filtered ("Loading section %s, size 0x%lx lma ",
1148 bfd_get_section_name (loadfile_bfd
, s
),
1149 (unsigned long) size
);
1150 print_address_numeric (lma
, 1, gdb_stdout
);
1151 printf_filtered ("\n");
1153 bfd_get_section_contents (loadfile_bfd
, s
, buffer
, 0, size
);
1155 sect
= (char *) bfd_get_section_name (loadfile_bfd
, s
);
1159 len
= (size
- sent
) < l
? (size
- sent
) : l
;
1161 err
= target_write_memory (lma
, buffer
, len
);
1162 if (ui_load_progress_hook
)
1163 if (ui_load_progress_hook (sect
, sent
))
1164 error ("Canceled the download");
1165 #if VALIDATE_DOWNLOAD
1166 /* Broken memories and broken monitors manifest themselves
1167 here when bring new computers to life.
1168 This doubles already slow downloads.
1173 target_read_memory (lma
, verify_buffer
, len
);
1174 if (0 != bcmp (buffer
, verify_buffer
, len
))
1175 error ("Download verify failed at %08x",
1176 (unsigned long) lma
);
1184 while (err
== 0 && sent
< size
);
1187 error ("Memory access error while loading section %s.",
1188 bfd_get_section_name (loadfile_bfd
, s
));
1190 do_cleanups (old_chain
);
1195 end_time
= time (NULL
);
1197 unsigned long entry
;
1198 entry
= bfd_get_start_address (loadfile_bfd
);
1199 printf_filtered ("Start address 0x%lx , load size %d\n", entry
, data_count
);
1200 /* We were doing this in remote-mips.c, I suspect it is right
1201 for other targets too. */
1205 /* FIXME: are we supposed to call symbol_file_add or not? According to
1206 a comment from remote-mips.c (where a call to symbol_file_add was
1207 commented out), making the call confuses GDB if more than one file is
1208 loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c
1211 report_transfer_performance (data_count
, start_time
, end_time
);
1213 do_cleanups (old_cleanups
);
1216 /* Report how fast the transfer went. */
1219 report_transfer_performance (data_count
, start_time
, end_time
)
1220 unsigned long data_count
;
1221 time_t start_time
, end_time
;
1223 printf_filtered ("Transfer rate: ");
1224 if (end_time
!= start_time
)
1225 printf_filtered ("%d bits/sec",
1226 (data_count
* 8) / (end_time
- start_time
));
1228 printf_filtered ("%d bits in <1 sec", (data_count
* 8));
1229 printf_filtered (".\n");
1232 /* This function allows the addition of incrementally linked object files.
1233 It does not modify any state in the target, only in the debugger. */
1237 add_symbol_file_command (args
, from_tty
)
1242 CORE_ADDR text_addr
;
1251 error ("add-symbol-file takes a file name and an address");
1254 /* Make a copy of the string that we can safely write into. */
1256 args
= strdup (args
);
1257 make_cleanup (free
, args
);
1259 /* Pick off any -option args and the file name. */
1261 while ((*args
!= '\000') && (name
== NULL
))
1263 while (isspace (*args
))
1268 while ((*args
!= '\000') && !isspace (*args
))
1272 if (*args
!= '\000')
1280 else if (STREQ (arg
, "-mapped"))
1284 else if (STREQ (arg
, "-readnow"))
1290 error ("unknown option `%s'", arg
);
1294 /* After picking off any options and the file name, args should be
1295 left pointing at the remainder of the command line, which should
1296 be the address expression to evaluate. */
1300 error ("add-symbol-file takes a file name");
1302 name
= tilde_expand (name
);
1303 make_cleanup (free
, name
);
1305 if (*args
!= '\000')
1307 text_addr
= parse_and_eval_address (args
);
1311 target_link (name
, &text_addr
);
1312 if (text_addr
== (CORE_ADDR
) -1)
1313 error ("Don't know how to get text start location for this file");
1316 /* FIXME-32x64: Assumes text_addr fits in a long. */
1318 && (!query ("add symbol table from file \"%s\" at text_addr = %s?\n",
1319 name
, local_hex_string ((unsigned long) text_addr
))))
1320 error ("Not confirmed.");
1322 symbol_file_add (name
, from_tty
, text_addr
, 0, mapped
, readnow
,
1323 1, /* user_loaded */
1324 0); /* We'll guess it's ! is_solib */
1326 /* Getting new symbols may change our opinion about what is
1328 reinit_frame_cache ();
1332 add_shared_symbol_files_command (args
, from_tty
)
1336 #ifdef ADD_SHARED_SYMBOL_FILES
1337 ADD_SHARED_SYMBOL_FILES (args
, from_tty
);
1339 error ("This command is not available in this configuration of GDB.");
1343 /* Re-read symbols if a symbol-file has changed. */
1347 struct objfile
*objfile
;
1350 struct stat new_statbuf
;
1353 /* With the addition of shared libraries, this should be modified,
1354 the load time should be saved in the partial symbol tables, since
1355 different tables may come from different source files. FIXME.
1356 This routine should then walk down each partial symbol table
1357 and see if the symbol table that it originates from has been changed */
1359 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
1363 #ifdef IBM6000_TARGET
1364 /* If this object is from a shared library, then you should
1365 stat on the library name, not member name. */
1367 if (objfile
->obfd
->my_archive
)
1368 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
1371 res
= stat (objfile
->name
, &new_statbuf
);
1374 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1375 printf_filtered ("`%s' has disappeared; keeping its symbols.\n",
1379 new_modtime
= new_statbuf
.st_mtime
;
1380 if (new_modtime
!= objfile
->mtime
)
1382 struct cleanup
*old_cleanups
;
1383 struct section_offsets
*offsets
;
1385 int section_offsets_size
;
1386 char *obfd_filename
;
1388 printf_filtered ("`%s' has changed; re-reading symbols.\n",
1391 /* There are various functions like symbol_file_add,
1392 symfile_bfd_open, syms_from_objfile, etc., which might
1393 appear to do what we want. But they have various other
1394 effects which we *don't* want. So we just do stuff
1395 ourselves. We don't worry about mapped files (for one thing,
1396 any mapped file will be out of date). */
1398 /* If we get an error, blow away this objfile (not sure if
1399 that is the correct response for things like shared
1401 old_cleanups
= make_cleanup ((make_cleanup_func
) free_objfile
,
1403 /* We need to do this whenever any symbols go away. */
1404 make_cleanup ((make_cleanup_func
) clear_symtab_users
, 0);
1406 /* Clean up any state BFD has sitting around. We don't need
1407 to close the descriptor but BFD lacks a way of closing the
1408 BFD without closing the descriptor. */
1409 obfd_filename
= bfd_get_filename (objfile
->obfd
);
1410 if (!bfd_close (objfile
->obfd
))
1411 error ("Can't close BFD for %s: %s", objfile
->name
,
1412 bfd_errmsg (bfd_get_error ()));
1413 objfile
->obfd
= bfd_openr (obfd_filename
, gnutarget
);
1414 if (objfile
->obfd
== NULL
)
1415 error ("Can't open %s to read symbols.", objfile
->name
);
1416 /* bfd_openr sets cacheable to true, which is what we want. */
1417 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
1418 error ("Can't read symbols from %s: %s.", objfile
->name
,
1419 bfd_errmsg (bfd_get_error ()));
1421 /* Save the offsets, we will nuke them with the rest of the
1423 num_offsets
= objfile
->num_sections
;
1424 section_offsets_size
=
1425 sizeof (struct section_offsets
)
1426 + sizeof (objfile
->section_offsets
->offsets
) * num_offsets
;
1427 offsets
= (struct section_offsets
*) alloca (section_offsets_size
);
1428 memcpy (offsets
, objfile
->section_offsets
, section_offsets_size
);
1430 /* Nuke all the state that we will re-read. Much of the following
1431 code which sets things to NULL really is necessary to tell
1432 other parts of GDB that there is nothing currently there. */
1434 /* FIXME: Do we have to free a whole linked list, or is this
1436 if (objfile
->global_psymbols
.list
)
1437 mfree (objfile
->md
, objfile
->global_psymbols
.list
);
1438 memset (&objfile
->global_psymbols
, 0,
1439 sizeof (objfile
->global_psymbols
));
1440 if (objfile
->static_psymbols
.list
)
1441 mfree (objfile
->md
, objfile
->static_psymbols
.list
);
1442 memset (&objfile
->static_psymbols
, 0,
1443 sizeof (objfile
->static_psymbols
));
1445 /* Free the obstacks for non-reusable objfiles */
1446 obstack_free (&objfile
->psymbol_cache
.cache
, 0);
1447 memset (&objfile
->psymbol_cache
, 0,
1448 sizeof (objfile
->psymbol_cache
));
1449 obstack_free (&objfile
->psymbol_obstack
, 0);
1450 obstack_free (&objfile
->symbol_obstack
, 0);
1451 obstack_free (&objfile
->type_obstack
, 0);
1452 objfile
->sections
= NULL
;
1453 objfile
->symtabs
= NULL
;
1454 objfile
->psymtabs
= NULL
;
1455 objfile
->free_psymtabs
= NULL
;
1456 objfile
->msymbols
= NULL
;
1457 objfile
->minimal_symbol_count
= 0;
1458 objfile
->fundamental_types
= NULL
;
1459 if (objfile
->sf
!= NULL
)
1461 (*objfile
->sf
->sym_finish
) (objfile
);
1464 /* We never make this a mapped file. */
1466 /* obstack_specify_allocation also initializes the obstack so
1468 obstack_specify_allocation (&objfile
->psymbol_cache
.cache
, 0, 0,
1470 obstack_specify_allocation (&objfile
->psymbol_obstack
, 0, 0,
1472 obstack_specify_allocation (&objfile
->symbol_obstack
, 0, 0,
1474 obstack_specify_allocation (&objfile
->type_obstack
, 0, 0,
1476 if (build_objfile_section_table (objfile
))
1478 error ("Can't find the file sections in `%s': %s",
1479 objfile
->name
, bfd_errmsg (bfd_get_error ()));
1482 /* We use the same section offsets as from last time. I'm not
1483 sure whether that is always correct for shared libraries. */
1484 objfile
->section_offsets
= (struct section_offsets
*)
1485 obstack_alloc (&objfile
->psymbol_obstack
, section_offsets_size
);
1486 memcpy (objfile
->section_offsets
, offsets
, section_offsets_size
);
1487 objfile
->num_sections
= num_offsets
;
1489 /* What the hell is sym_new_init for, anyway? The concept of
1490 distinguishing between the main file and additional files
1491 in this way seems rather dubious. */
1492 if (objfile
== symfile_objfile
)
1494 (*objfile
->sf
->sym_new_init
) (objfile
);
1496 RESET_HP_UX_GLOBALS ();
1500 (*objfile
->sf
->sym_init
) (objfile
);
1501 clear_complaints (1, 1);
1502 /* The "mainline" parameter is a hideous hack; I think leaving it
1503 zero is OK since dbxread.c also does what it needs to do if
1504 objfile->global_psymbols.size is 0. */
1505 (*objfile
->sf
->sym_read
) (objfile
, 0);
1506 if (!have_partial_symbols () && !have_full_symbols ())
1509 printf_filtered ("(no debugging symbols found)\n");
1512 objfile
->flags
|= OBJF_SYMS
;
1514 /* We're done reading the symbol file; finish off complaints. */
1515 clear_complaints (0, 1);
1517 /* Getting new symbols may change our opinion about what is
1520 reinit_frame_cache ();
1522 /* Discard cleanups as symbol reading was successful. */
1523 discard_cleanups (old_cleanups
);
1525 /* If the mtime has changed between the time we set new_modtime
1526 and now, we *want* this to be out of date, so don't call stat
1528 objfile
->mtime
= new_modtime
;
1531 /* Call this after reading in a new symbol table to give target
1532 dependant code a crack at the new symbols. For instance, this
1533 could be used to update the values of target-specific symbols GDB
1534 needs to keep track of (such as _sigtramp, or whatever). */
1536 TARGET_SYMFILE_POSTREAD (objfile
);
1542 clear_symtab_users ();
1554 static filename_language
*filename_language_table
;
1555 static int fl_table_size
, fl_table_next
;
1558 add_filename_language (ext
, lang
)
1562 if (fl_table_next
>= fl_table_size
)
1564 fl_table_size
+= 10;
1565 filename_language_table
= realloc (filename_language_table
,
1569 filename_language_table
[fl_table_next
].ext
= strsave (ext
);
1570 filename_language_table
[fl_table_next
].lang
= lang
;
1574 static char *ext_args
;
1577 set_ext_lang_command (args
, from_tty
)
1582 char *cp
= ext_args
;
1585 /* First arg is filename extension, starting with '.' */
1587 error ("'%s': Filename extension must begin with '.'", ext_args
);
1589 /* Find end of first arg. */
1590 while (*cp
&& !isspace (*cp
))
1594 error ("'%s': two arguments required -- filename extension and language",
1597 /* Null-terminate first arg */
1600 /* Find beginning of second arg, which should be a source language. */
1601 while (*cp
&& isspace (*cp
))
1605 error ("'%s': two arguments required -- filename extension and language",
1608 /* Lookup the language from among those we know. */
1609 lang
= language_enum (cp
);
1611 /* Now lookup the filename extension: do we already know it? */
1612 for (i
= 0; i
< fl_table_next
; i
++)
1613 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
1616 if (i
>= fl_table_next
)
1618 /* new file extension */
1619 add_filename_language (ext_args
, lang
);
1623 /* redefining a previously known filename extension */
1626 /* query ("Really make files of type %s '%s'?", */
1627 /* ext_args, language_str (lang)); */
1629 free (filename_language_table
[i
].ext
);
1630 filename_language_table
[i
].ext
= strsave (ext_args
);
1631 filename_language_table
[i
].lang
= lang
;
1636 info_ext_lang_command (args
, from_tty
)
1642 printf_filtered ("Filename extensions and the languages they represent:");
1643 printf_filtered ("\n\n");
1644 for (i
= 0; i
< fl_table_next
; i
++)
1645 printf_filtered ("\t%s\t- %s\n",
1646 filename_language_table
[i
].ext
,
1647 language_str (filename_language_table
[i
].lang
));
1651 init_filename_language_table ()
1653 if (fl_table_size
== 0) /* protect against repetition */
1657 filename_language_table
=
1658 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
1659 add_filename_language (".c", language_c
);
1660 add_filename_language (".C", language_cplus
);
1661 add_filename_language (".cc", language_cplus
);
1662 add_filename_language (".cp", language_cplus
);
1663 add_filename_language (".cpp", language_cplus
);
1664 add_filename_language (".cxx", language_cplus
);
1665 add_filename_language (".c++", language_cplus
);
1666 add_filename_language (".java", language_java
);
1667 add_filename_language (".class", language_java
);
1668 add_filename_language (".ch", language_chill
);
1669 add_filename_language (".c186", language_chill
);
1670 add_filename_language (".c286", language_chill
);
1671 add_filename_language (".f", language_fortran
);
1672 add_filename_language (".F", language_fortran
);
1673 add_filename_language (".s", language_asm
);
1674 add_filename_language (".S", language_asm
);
1679 deduce_language_from_filename (filename
)
1685 if (filename
!= NULL
)
1686 if ((cp
= strrchr (filename
, '.')) != NULL
)
1687 for (i
= 0; i
< fl_table_next
; i
++)
1688 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
1689 return filename_language_table
[i
].lang
;
1691 return language_unknown
;
1696 Allocate and partly initialize a new symbol table. Return a pointer
1697 to it. error() if no space.
1699 Caller must set these fields:
1705 possibly free_named_symtabs (symtab->filename);
1709 allocate_symtab (filename
, objfile
)
1711 struct objfile
*objfile
;
1713 register struct symtab
*symtab
;
1715 symtab
= (struct symtab
*)
1716 obstack_alloc (&objfile
->symbol_obstack
, sizeof (struct symtab
));
1717 memset (symtab
, 0, sizeof (*symtab
));
1718 symtab
->filename
= obsavestring (filename
, strlen (filename
),
1719 &objfile
->symbol_obstack
);
1720 symtab
->fullname
= NULL
;
1721 symtab
->language
= deduce_language_from_filename (filename
);
1722 symtab
->debugformat
= obsavestring ("unknown", 7,
1723 &objfile
->symbol_obstack
);
1725 /* Hook it to the objfile it comes from */
1727 symtab
->objfile
= objfile
;
1728 symtab
->next
= objfile
->symtabs
;
1729 objfile
->symtabs
= symtab
;
1731 /* FIXME: This should go away. It is only defined for the Z8000,
1732 and the Z8000 definition of this macro doesn't have anything to
1733 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
1734 here for convenience. */
1735 #ifdef INIT_EXTRA_SYMTAB_INFO
1736 INIT_EXTRA_SYMTAB_INFO (symtab
);
1742 struct partial_symtab
*
1743 allocate_psymtab (filename
, objfile
)
1745 struct objfile
*objfile
;
1747 struct partial_symtab
*psymtab
;
1749 if (objfile
->free_psymtabs
)
1751 psymtab
= objfile
->free_psymtabs
;
1752 objfile
->free_psymtabs
= psymtab
->next
;
1755 psymtab
= (struct partial_symtab
*)
1756 obstack_alloc (&objfile
->psymbol_obstack
,
1757 sizeof (struct partial_symtab
));
1759 memset (psymtab
, 0, sizeof (struct partial_symtab
));
1760 psymtab
->filename
= obsavestring (filename
, strlen (filename
),
1761 &objfile
->psymbol_obstack
);
1762 psymtab
->symtab
= NULL
;
1764 /* Prepend it to the psymtab list for the objfile it belongs to.
1765 Psymtabs are searched in most recent inserted -> least recent
1768 psymtab
->objfile
= objfile
;
1769 psymtab
->next
= objfile
->psymtabs
;
1770 objfile
->psymtabs
= psymtab
;
1773 struct partial_symtab
**prev_pst
;
1774 psymtab
->objfile
= objfile
;
1775 psymtab
->next
= NULL
;
1776 prev_pst
= &(objfile
->psymtabs
);
1777 while ((*prev_pst
) != NULL
)
1778 prev_pst
= &((*prev_pst
)->next
);
1779 (*prev_pst
) = psymtab
;
1787 discard_psymtab (pst
)
1788 struct partial_symtab
*pst
;
1790 struct partial_symtab
**prev_pst
;
1793 Empty psymtabs happen as a result of header files which don't
1794 have any symbols in them. There can be a lot of them. But this
1795 check is wrong, in that a psymtab with N_SLINE entries but
1796 nothing else is not empty, but we don't realize that. Fixing
1797 that without slowing things down might be tricky. */
1799 /* First, snip it out of the psymtab chain */
1801 prev_pst
= &(pst
->objfile
->psymtabs
);
1802 while ((*prev_pst
) != pst
)
1803 prev_pst
= &((*prev_pst
)->next
);
1804 (*prev_pst
) = pst
->next
;
1806 /* Next, put it on a free list for recycling */
1808 pst
->next
= pst
->objfile
->free_psymtabs
;
1809 pst
->objfile
->free_psymtabs
= pst
;
1813 /* Reset all data structures in gdb which may contain references to symbol
1817 clear_symtab_users ()
1819 /* Someday, we should do better than this, by only blowing away
1820 the things that really need to be blown. */
1821 clear_value_history ();
1823 clear_internalvars ();
1824 breakpoint_re_set ();
1825 set_default_breakpoint (0, 0, 0, 0);
1826 current_source_symtab
= 0;
1827 current_source_line
= 0;
1828 clear_pc_function_cache ();
1829 target_new_objfile (NULL
);
1832 /* clear_symtab_users_once:
1834 This function is run after symbol reading, or from a cleanup.
1835 If an old symbol table was obsoleted, the old symbol table
1836 has been blown away, but the other GDB data structures that may
1837 reference it have not yet been cleared or re-directed. (The old
1838 symtab was zapped, and the cleanup queued, in free_named_symtab()
1841 This function can be queued N times as a cleanup, or called
1842 directly; it will do all the work the first time, and then will be a
1843 no-op until the next time it is queued. This works by bumping a
1844 counter at queueing time. Much later when the cleanup is run, or at
1845 the end of symbol processing (in case the cleanup is discarded), if
1846 the queued count is greater than the "done-count", we do the work
1847 and set the done-count to the queued count. If the queued count is
1848 less than or equal to the done-count, we just ignore the call. This
1849 is needed because reading a single .o file will often replace many
1850 symtabs (one per .h file, for example), and we don't want to reset
1851 the breakpoints N times in the user's face.
1853 The reason we both queue a cleanup, and call it directly after symbol
1854 reading, is because the cleanup protects us in case of errors, but is
1855 discarded if symbol reading is successful. */
1858 /* FIXME: As free_named_symtabs is currently a big noop this function
1859 is no longer needed. */
1861 clear_symtab_users_once
PARAMS ((void));
1863 static int clear_symtab_users_queued
;
1864 static int clear_symtab_users_done
;
1867 clear_symtab_users_once ()
1869 /* Enforce once-per-`do_cleanups'-semantics */
1870 if (clear_symtab_users_queued
<= clear_symtab_users_done
)
1872 clear_symtab_users_done
= clear_symtab_users_queued
;
1874 clear_symtab_users ();
1878 /* Delete the specified psymtab, and any others that reference it. */
1881 cashier_psymtab (pst
)
1882 struct partial_symtab
*pst
;
1884 struct partial_symtab
*ps
, *pprev
= NULL
;
1887 /* Find its previous psymtab in the chain */
1888 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
1897 /* Unhook it from the chain. */
1898 if (ps
== pst
->objfile
->psymtabs
)
1899 pst
->objfile
->psymtabs
= ps
->next
;
1901 pprev
->next
= ps
->next
;
1903 /* FIXME, we can't conveniently deallocate the entries in the
1904 partial_symbol lists (global_psymbols/static_psymbols) that
1905 this psymtab points to. These just take up space until all
1906 the psymtabs are reclaimed. Ditto the dependencies list and
1907 filename, which are all in the psymbol_obstack. */
1909 /* We need to cashier any psymtab that has this one as a dependency... */
1911 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
1913 for (i
= 0; i
< ps
->number_of_dependencies
; i
++)
1915 if (ps
->dependencies
[i
] == pst
)
1917 cashier_psymtab (ps
);
1918 goto again
; /* Must restart, chain has been munged. */
1925 /* If a symtab or psymtab for filename NAME is found, free it along
1926 with any dependent breakpoints, displays, etc.
1927 Used when loading new versions of object modules with the "add-file"
1928 command. This is only called on the top-level symtab or psymtab's name;
1929 it is not called for subsidiary files such as .h files.
1931 Return value is 1 if we blew away the environment, 0 if not.
1932 FIXME. The return valu appears to never be used.
1934 FIXME. I think this is not the best way to do this. We should
1935 work on being gentler to the environment while still cleaning up
1936 all stray pointers into the freed symtab. */
1939 free_named_symtabs (name
)
1943 /* FIXME: With the new method of each objfile having it's own
1944 psymtab list, this function needs serious rethinking. In particular,
1945 why was it ever necessary to toss psymtabs with specific compilation
1946 unit filenames, as opposed to all psymtabs from a particular symbol
1948 Well, the answer is that some systems permit reloading of particular
1949 compilation units. We want to blow away any old info about these
1950 compilation units, regardless of which objfiles they arrived in. --gnu. */
1952 register struct symtab
*s
;
1953 register struct symtab
*prev
;
1954 register struct partial_symtab
*ps
;
1955 struct blockvector
*bv
;
1958 /* We only wack things if the symbol-reload switch is set. */
1959 if (!symbol_reloading
)
1962 /* Some symbol formats have trouble providing file names... */
1963 if (name
== 0 || *name
== '\0')
1966 /* Look for a psymtab with the specified name. */
1969 for (ps
= partial_symtab_list
; ps
; ps
= ps
->next
)
1971 if (STREQ (name
, ps
->filename
))
1973 cashier_psymtab (ps
); /* Blow it away...and its little dog, too. */
1974 goto again2
; /* Must restart, chain has been munged */
1978 /* Look for a symtab with the specified name. */
1980 for (s
= symtab_list
; s
; s
= s
->next
)
1982 if (STREQ (name
, s
->filename
))
1989 if (s
== symtab_list
)
1990 symtab_list
= s
->next
;
1992 prev
->next
= s
->next
;
1994 /* For now, queue a delete for all breakpoints, displays, etc., whether
1995 or not they depend on the symtab being freed. This should be
1996 changed so that only those data structures affected are deleted. */
1998 /* But don't delete anything if the symtab is empty.
1999 This test is necessary due to a bug in "dbxread.c" that
2000 causes empty symtabs to be created for N_SO symbols that
2001 contain the pathname of the object file. (This problem
2002 has been fixed in GDB 3.9x). */
2004 bv
= BLOCKVECTOR (s
);
2005 if (BLOCKVECTOR_NBLOCKS (bv
) > 2
2006 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
))
2007 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)))
2009 complain (&oldsyms_complaint
, name
);
2011 clear_symtab_users_queued
++;
2012 make_cleanup (clear_symtab_users_once
, 0);
2017 complain (&empty_symtab_complaint
, name
);
2024 /* It is still possible that some breakpoints will be affected
2025 even though no symtab was found, since the file might have
2026 been compiled without debugging, and hence not be associated
2027 with a symtab. In order to handle this correctly, we would need
2028 to keep a list of text address ranges for undebuggable files.
2029 For now, we do nothing, since this is a fairly obscure case. */
2033 /* FIXME, what about the minimal symbol table? */
2040 /* Allocate and partially fill a partial symtab. It will be
2041 completely filled at the end of the symbol list.
2043 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2044 is the address relative to which its symbols are (incremental) or 0
2048 struct partial_symtab
*
2049 start_psymtab_common (objfile
, section_offsets
,
2050 filename
, textlow
, global_syms
, static_syms
)
2051 struct objfile
*objfile
;
2052 struct section_offsets
*section_offsets
;
2055 struct partial_symbol
**global_syms
;
2056 struct partial_symbol
**static_syms
;
2058 struct partial_symtab
*psymtab
;
2060 psymtab
= allocate_psymtab (filename
, objfile
);
2061 psymtab
->section_offsets
= section_offsets
;
2062 psymtab
->textlow
= textlow
;
2063 psymtab
->texthigh
= psymtab
->textlow
; /* default */
2064 psymtab
->globals_offset
= global_syms
- objfile
->global_psymbols
.list
;
2065 psymtab
->statics_offset
= static_syms
- objfile
->static_psymbols
.list
;
2069 /* Add a symbol with a long value to a psymtab.
2070 Since one arg is a struct, we pass in a ptr and deref it (sigh). */
2073 add_psymbol_to_list (name
, namelength
, namespace, class, list
, val
, coreaddr
,
2077 namespace_enum
namespace;
2078 enum address_class
class;
2079 struct psymbol_allocation_list
*list
;
2080 long val
; /* Value as a long */
2081 CORE_ADDR coreaddr
; /* Value as a CORE_ADDR */
2082 enum language language
;
2083 struct objfile
*objfile
;
2085 register struct partial_symbol
*psym
;
2086 char *buf
= alloca (namelength
+ 1);
2087 /* psymbol is static so that there will be no uninitialized gaps in the
2088 structure which might contain random data, causing cache misses in
2090 static struct partial_symbol psymbol
;
2092 /* Create local copy of the partial symbol */
2093 memcpy (buf
, name
, namelength
);
2094 buf
[namelength
] = '\0';
2095 SYMBOL_NAME (&psymbol
) = bcache (buf
, namelength
+ 1, &objfile
->psymbol_cache
);
2096 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2099 SYMBOL_VALUE (&psymbol
) = val
;
2103 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2105 SYMBOL_SECTION (&psymbol
) = 0;
2106 SYMBOL_LANGUAGE (&psymbol
) = language
;
2107 PSYMBOL_NAMESPACE (&psymbol
) = namespace;
2108 PSYMBOL_CLASS (&psymbol
) = class;
2109 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2111 /* Stash the partial symbol away in the cache */
2112 psym
= bcache (&psymbol
, sizeof (struct partial_symbol
), &objfile
->psymbol_cache
);
2114 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2115 if (list
->next
>= list
->list
+ list
->size
)
2117 extend_psymbol_list (list
, objfile
);
2119 *list
->next
++ = psym
;
2120 OBJSTAT (objfile
, n_psyms
++);
2123 /* Add a symbol with a long value to a psymtab. This differs from
2124 * add_psymbol_to_list above in taking both a mangled and a demangled
2128 add_psymbol_with_dem_name_to_list (name
, namelength
, dem_name
, dem_namelength
,
2129 namespace, class, list
, val
, coreaddr
, language
, objfile
)
2134 namespace_enum
namespace;
2135 enum address_class
class;
2136 struct psymbol_allocation_list
*list
;
2137 long val
; /* Value as a long */
2138 CORE_ADDR coreaddr
; /* Value as a CORE_ADDR */
2139 enum language language
;
2140 struct objfile
*objfile
;
2142 register struct partial_symbol
*psym
;
2143 char *buf
= alloca (namelength
+ 1);
2144 /* psymbol is static so that there will be no uninitialized gaps in the
2145 structure which might contain random data, causing cache misses in
2147 static struct partial_symbol psymbol
;
2149 /* Create local copy of the partial symbol */
2151 memcpy (buf
, name
, namelength
);
2152 buf
[namelength
] = '\0';
2153 SYMBOL_NAME (&psymbol
) = bcache (buf
, namelength
+ 1, &objfile
->psymbol_cache
);
2155 buf
= alloca (dem_namelength
+ 1);
2156 memcpy (buf
, dem_name
, dem_namelength
);
2157 buf
[dem_namelength
] = '\0';
2162 case language_cplus
:
2163 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol
) =
2164 bcache (buf
, dem_namelength
+ 1, &objfile
->psymbol_cache
);
2166 case language_chill
:
2167 SYMBOL_CHILL_DEMANGLED_NAME (&psymbol
) =
2168 bcache (buf
, dem_namelength
+ 1, &objfile
->psymbol_cache
);
2170 /* FIXME What should be done for the default case? Ignoring for now. */
2173 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2176 SYMBOL_VALUE (&psymbol
) = val
;
2180 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2182 SYMBOL_SECTION (&psymbol
) = 0;
2183 SYMBOL_LANGUAGE (&psymbol
) = language
;
2184 PSYMBOL_NAMESPACE (&psymbol
) = namespace;
2185 PSYMBOL_CLASS (&psymbol
) = class;
2186 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2188 /* Stash the partial symbol away in the cache */
2189 psym
= bcache (&psymbol
, sizeof (struct partial_symbol
), &objfile
->psymbol_cache
);
2191 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2192 if (list
->next
>= list
->list
+ list
->size
)
2194 extend_psymbol_list (list
, objfile
);
2196 *list
->next
++ = psym
;
2197 OBJSTAT (objfile
, n_psyms
++);
2200 /* Initialize storage for partial symbols. */
2203 init_psymbol_list (objfile
, total_symbols
)
2204 struct objfile
*objfile
;
2207 /* Free any previously allocated psymbol lists. */
2209 if (objfile
->global_psymbols
.list
)
2211 mfree (objfile
->md
, (PTR
) objfile
->global_psymbols
.list
);
2213 if (objfile
->static_psymbols
.list
)
2215 mfree (objfile
->md
, (PTR
) objfile
->static_psymbols
.list
);
2218 /* Current best guess is that approximately a twentieth
2219 of the total symbols (in a debugging file) are global or static
2222 objfile
->global_psymbols
.size
= total_symbols
/ 10;
2223 objfile
->static_psymbols
.size
= total_symbols
/ 10;
2225 if (objfile
->global_psymbols
.size
> 0)
2227 objfile
->global_psymbols
.next
=
2228 objfile
->global_psymbols
.list
= (struct partial_symbol
**)
2229 xmmalloc (objfile
->md
, (objfile
->global_psymbols
.size
2230 * sizeof (struct partial_symbol
*)));
2232 if (objfile
->static_psymbols
.size
> 0)
2234 objfile
->static_psymbols
.next
=
2235 objfile
->static_psymbols
.list
= (struct partial_symbol
**)
2236 xmmalloc (objfile
->md
, (objfile
->static_psymbols
.size
2237 * sizeof (struct partial_symbol
*)));
2242 The following code implements an abstraction for debugging overlay sections.
2244 The target model is as follows:
2245 1) The gnu linker will permit multiple sections to be mapped into the
2246 same VMA, each with its own unique LMA (or load address).
2247 2) It is assumed that some runtime mechanism exists for mapping the
2248 sections, one by one, from the load address into the VMA address.
2249 3) This code provides a mechanism for gdb to keep track of which
2250 sections should be considered to be mapped from the VMA to the LMA.
2251 This information is used for symbol lookup, and memory read/write.
2252 For instance, if a section has been mapped then its contents
2253 should be read from the VMA, otherwise from the LMA.
2255 Two levels of debugger support for overlays are available. One is
2256 "manual", in which the debugger relies on the user to tell it which
2257 overlays are currently mapped. This level of support is
2258 implemented entirely in the core debugger, and the information about
2259 whether a section is mapped is kept in the objfile->obj_section table.
2261 The second level of support is "automatic", and is only available if
2262 the target-specific code provides functionality to read the target's
2263 overlay mapping table, and translate its contents for the debugger
2264 (by updating the mapped state information in the obj_section tables).
2266 The interface is as follows:
2268 overlay map <name> -- tell gdb to consider this section mapped
2269 overlay unmap <name> -- tell gdb to consider this section unmapped
2270 overlay list -- list the sections that GDB thinks are mapped
2271 overlay read-target -- get the target's state of what's mapped
2272 overlay off/manual/auto -- set overlay debugging state
2273 Functional interface:
2274 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2275 section, return that section.
2276 find_pc_overlay(pc): find any overlay section that contains
2277 the pc, either in its VMA or its LMA
2278 overlay_is_mapped(sect): true if overlay is marked as mapped
2279 section_is_overlay(sect): true if section's VMA != LMA
2280 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2281 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2282 overlay_mapped_address(...): map an address from section's LMA to VMA
2283 overlay_unmapped_address(...): map an address from section's VMA to LMA
2284 symbol_overlayed_address(...): Return a "current" address for symbol:
2285 either in VMA or LMA depending on whether
2286 the symbol's section is currently mapped
2289 /* Overlay debugging state: */
2291 int overlay_debugging
= 0; /* 0 == off, 1 == manual, -1 == auto */
2292 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
2294 /* Target vector for refreshing overlay mapped state */
2295 static void simple_overlay_update
PARAMS ((struct obj_section
*));
2296 void (*target_overlay_update
) PARAMS ((struct obj_section
*))
2297 = simple_overlay_update
;
2299 /* Function: section_is_overlay (SECTION)
2300 Returns true if SECTION has VMA not equal to LMA, ie.
2301 SECTION is loaded at an address different from where it will "run". */
2304 section_is_overlay (section
)
2307 if (overlay_debugging
)
2308 if (section
&& section
->lma
!= 0 &&
2309 section
->vma
!= section
->lma
)
2315 /* Function: overlay_invalidate_all (void)
2316 Invalidate the mapped state of all overlay sections (mark it as stale). */
2319 overlay_invalidate_all ()
2321 struct objfile
*objfile
;
2322 struct obj_section
*sect
;
2324 ALL_OBJSECTIONS (objfile
, sect
)
2325 if (section_is_overlay (sect
->the_bfd_section
))
2326 sect
->ovly_mapped
= -1;
2329 /* Function: overlay_is_mapped (SECTION)
2330 Returns true if section is an overlay, and is currently mapped.
2331 Private: public access is thru function section_is_mapped.
2333 Access to the ovly_mapped flag is restricted to this function, so
2334 that we can do automatic update. If the global flag
2335 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2336 overlay_invalidate_all. If the mapped state of the particular
2337 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2340 overlay_is_mapped (osect
)
2341 struct obj_section
*osect
;
2343 if (osect
== 0 || !section_is_overlay (osect
->the_bfd_section
))
2346 switch (overlay_debugging
)
2350 return 0; /* overlay debugging off */
2351 case -1: /* overlay debugging automatic */
2352 /* Unles there is a target_overlay_update function,
2353 there's really nothing useful to do here (can't really go auto) */
2354 if (target_overlay_update
)
2356 if (overlay_cache_invalid
)
2358 overlay_invalidate_all ();
2359 overlay_cache_invalid
= 0;
2361 if (osect
->ovly_mapped
== -1)
2362 (*target_overlay_update
) (osect
);
2364 /* fall thru to manual case */
2365 case 1: /* overlay debugging manual */
2366 return osect
->ovly_mapped
== 1;
2370 /* Function: section_is_mapped
2371 Returns true if section is an overlay, and is currently mapped. */
2374 section_is_mapped (section
)
2377 struct objfile
*objfile
;
2378 struct obj_section
*osect
;
2380 if (overlay_debugging
)
2381 if (section
&& section_is_overlay (section
))
2382 ALL_OBJSECTIONS (objfile
, osect
)
2383 if (osect
->the_bfd_section
== section
)
2384 return overlay_is_mapped (osect
);
2389 /* Function: pc_in_unmapped_range
2390 If PC falls into the lma range of SECTION, return true, else false. */
2393 pc_in_unmapped_range (pc
, section
)
2399 if (overlay_debugging
)
2400 if (section
&& section_is_overlay (section
))
2402 size
= bfd_get_section_size_before_reloc (section
);
2403 if (section
->lma
<= pc
&& pc
< section
->lma
+ size
)
2409 /* Function: pc_in_mapped_range
2410 If PC falls into the vma range of SECTION, return true, else false. */
2413 pc_in_mapped_range (pc
, section
)
2419 if (overlay_debugging
)
2420 if (section
&& section_is_overlay (section
))
2422 size
= bfd_get_section_size_before_reloc (section
);
2423 if (section
->vma
<= pc
&& pc
< section
->vma
+ size
)
2429 /* Function: overlay_unmapped_address (PC, SECTION)
2430 Returns the address corresponding to PC in the unmapped (load) range.
2431 May be the same as PC. */
2434 overlay_unmapped_address (pc
, section
)
2438 if (overlay_debugging
)
2439 if (section
&& section_is_overlay (section
) &&
2440 pc_in_mapped_range (pc
, section
))
2441 return pc
+ section
->lma
- section
->vma
;
2446 /* Function: overlay_mapped_address (PC, SECTION)
2447 Returns the address corresponding to PC in the mapped (runtime) range.
2448 May be the same as PC. */
2451 overlay_mapped_address (pc
, section
)
2455 if (overlay_debugging
)
2456 if (section
&& section_is_overlay (section
) &&
2457 pc_in_unmapped_range (pc
, section
))
2458 return pc
+ section
->vma
- section
->lma
;
2464 /* Function: symbol_overlayed_address
2465 Return one of two addresses (relative to the VMA or to the LMA),
2466 depending on whether the section is mapped or not. */
2469 symbol_overlayed_address (address
, section
)
2473 if (overlay_debugging
)
2475 /* If the symbol has no section, just return its regular address. */
2478 /* If the symbol's section is not an overlay, just return its address */
2479 if (!section_is_overlay (section
))
2481 /* If the symbol's section is mapped, just return its address */
2482 if (section_is_mapped (section
))
2485 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
2486 * then return its LOADED address rather than its vma address!!
2488 return overlay_unmapped_address (address
, section
);
2493 /* Function: find_pc_overlay (PC)
2494 Return the best-match overlay section for PC:
2495 If PC matches a mapped overlay section's VMA, return that section.
2496 Else if PC matches an unmapped section's VMA, return that section.
2497 Else if PC matches an unmapped section's LMA, return that section. */
2500 find_pc_overlay (pc
)
2503 struct objfile
*objfile
;
2504 struct obj_section
*osect
, *best_match
= NULL
;
2506 if (overlay_debugging
)
2507 ALL_OBJSECTIONS (objfile
, osect
)
2508 if (section_is_overlay (osect
->the_bfd_section
))
2510 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
))
2512 if (overlay_is_mapped (osect
))
2513 return osect
->the_bfd_section
;
2517 else if (pc_in_unmapped_range (pc
, osect
->the_bfd_section
))
2520 return best_match
? best_match
->the_bfd_section
: NULL
;
2523 /* Function: find_pc_mapped_section (PC)
2524 If PC falls into the VMA address range of an overlay section that is
2525 currently marked as MAPPED, return that section. Else return NULL. */
2528 find_pc_mapped_section (pc
)
2531 struct objfile
*objfile
;
2532 struct obj_section
*osect
;
2534 if (overlay_debugging
)
2535 ALL_OBJSECTIONS (objfile
, osect
)
2536 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
) &&
2537 overlay_is_mapped (osect
))
2538 return osect
->the_bfd_section
;
2543 /* Function: list_overlays_command
2544 Print a list of mapped sections and their PC ranges */
2547 list_overlays_command (args
, from_tty
)
2552 struct objfile
*objfile
;
2553 struct obj_section
*osect
;
2555 if (overlay_debugging
)
2556 ALL_OBJSECTIONS (objfile
, osect
)
2557 if (overlay_is_mapped (osect
))
2563 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
2564 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
2565 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
2566 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
2568 printf_filtered ("Section %s, loaded at ", name
);
2569 print_address_numeric (lma
, 1, gdb_stdout
);
2570 puts_filtered (" - ");
2571 print_address_numeric (lma
+ size
, 1, gdb_stdout
);
2572 printf_filtered (", mapped at ");
2573 print_address_numeric (vma
, 1, gdb_stdout
);
2574 puts_filtered (" - ");
2575 print_address_numeric (vma
+ size
, 1, gdb_stdout
);
2576 puts_filtered ("\n");
2581 printf_filtered ("No sections are mapped.\n");
2584 /* Function: map_overlay_command
2585 Mark the named section as mapped (ie. residing at its VMA address). */
2588 map_overlay_command (args
, from_tty
)
2592 struct objfile
*objfile
, *objfile2
;
2593 struct obj_section
*sec
, *sec2
;
2596 if (!overlay_debugging
)
2597 error ("Overlay debugging not enabled. Use the 'OVERLAY ON' command.");
2599 if (args
== 0 || *args
== 0)
2600 error ("Argument required: name of an overlay section");
2602 /* First, find a section matching the user supplied argument */
2603 ALL_OBJSECTIONS (objfile
, sec
)
2604 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
2606 /* Now, check to see if the section is an overlay. */
2607 bfdsec
= sec
->the_bfd_section
;
2608 if (!section_is_overlay (bfdsec
))
2609 continue; /* not an overlay section */
2611 /* Mark the overlay as "mapped" */
2612 sec
->ovly_mapped
= 1;
2614 /* Next, make a pass and unmap any sections that are
2615 overlapped by this new section: */
2616 ALL_OBJSECTIONS (objfile2
, sec2
)
2617 if (sec2
->ovly_mapped
&&
2619 sec
->the_bfd_section
!= sec2
->the_bfd_section
&&
2620 (pc_in_mapped_range (sec2
->addr
, sec
->the_bfd_section
) ||
2621 pc_in_mapped_range (sec2
->endaddr
, sec
->the_bfd_section
)))
2624 printf_filtered ("Note: section %s unmapped by overlap\n",
2625 bfd_section_name (objfile
->obfd
,
2626 sec2
->the_bfd_section
));
2627 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
2631 error ("No overlay section called %s", args
);
2634 /* Function: unmap_overlay_command
2635 Mark the overlay section as unmapped
2636 (ie. resident in its LMA address range, rather than the VMA range). */
2639 unmap_overlay_command (args
, from_tty
)
2643 struct objfile
*objfile
;
2644 struct obj_section
*sec
;
2646 if (!overlay_debugging
)
2647 error ("Overlay debugging not enabled. Use the 'OVERLAY ON' command.");
2649 if (args
== 0 || *args
== 0)
2650 error ("Argument required: name of an overlay section");
2652 /* First, find a section matching the user supplied argument */
2653 ALL_OBJSECTIONS (objfile
, sec
)
2654 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
2656 if (!sec
->ovly_mapped
)
2657 error ("Section %s is not mapped", args
);
2658 sec
->ovly_mapped
= 0;
2661 error ("No overlay section called %s", args
);
2664 /* Function: overlay_auto_command
2665 A utility command to turn on overlay debugging.
2666 Possibly this should be done via a set/show command. */
2669 overlay_auto_command (args
, from_tty
)
2673 overlay_debugging
= -1;
2675 printf_filtered ("Automatic overlay debugging enabled.");
2678 /* Function: overlay_manual_command
2679 A utility command to turn on overlay debugging.
2680 Possibly this should be done via a set/show command. */
2683 overlay_manual_command (args
, from_tty
)
2687 overlay_debugging
= 1;
2689 printf_filtered ("Overlay debugging enabled.");
2692 /* Function: overlay_off_command
2693 A utility command to turn on overlay debugging.
2694 Possibly this should be done via a set/show command. */
2697 overlay_off_command (args
, from_tty
)
2701 overlay_debugging
= 0;
2703 printf_filtered ("Overlay debugging disabled.");
2707 overlay_load_command (args
, from_tty
)
2711 if (target_overlay_update
)
2712 (*target_overlay_update
) (NULL
);
2714 error ("This target does not know how to read its overlay state.");
2717 /* Function: overlay_command
2718 A place-holder for a mis-typed command */
2720 /* Command list chain containing all defined "overlay" subcommands. */
2721 struct cmd_list_element
*overlaylist
;
2724 overlay_command (args
, from_tty
)
2729 ("\"overlay\" must be followed by the name of an overlay command.\n");
2730 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
2734 /* Target Overlays for the "Simplest" overlay manager:
2736 This is GDB's default target overlay layer. It works with the
2737 minimal overlay manager supplied as an example by Cygnus. The
2738 entry point is via a function pointer "target_overlay_update",
2739 so targets that use a different runtime overlay manager can
2740 substitute their own overlay_update function and take over the
2743 The overlay_update function pokes around in the target's data structures
2744 to see what overlays are mapped, and updates GDB's overlay mapping with
2747 In this simple implementation, the target data structures are as follows:
2748 unsigned _novlys; /# number of overlay sections #/
2749 unsigned _ovly_table[_novlys][4] = {
2750 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
2751 {..., ..., ..., ...},
2753 unsigned _novly_regions; /# number of overlay regions #/
2754 unsigned _ovly_region_table[_novly_regions][3] = {
2755 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
2758 These functions will attempt to update GDB's mappedness state in the
2759 symbol section table, based on the target's mappedness state.
2761 To do this, we keep a cached copy of the target's _ovly_table, and
2762 attempt to detect when the cached copy is invalidated. The main
2763 entry point is "simple_overlay_update(SECT), which looks up SECT in
2764 the cached table and re-reads only the entry for that section from
2765 the target (whenever possible).
2768 /* Cached, dynamically allocated copies of the target data structures: */
2769 static unsigned (*cache_ovly_table
)[4] = 0;
2771 static unsigned (*cache_ovly_region_table
)[3] = 0;
2773 static unsigned cache_novlys
= 0;
2775 static unsigned cache_novly_regions
= 0;
2777 static CORE_ADDR cache_ovly_table_base
= 0;
2779 static CORE_ADDR cache_ovly_region_table_base
= 0;
2783 VMA
, SIZE
, LMA
, MAPPED
2785 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
2787 /* Throw away the cached copy of _ovly_table */
2789 simple_free_overlay_table ()
2791 if (cache_ovly_table
)
2792 free (cache_ovly_table
);
2794 cache_ovly_table
= NULL
;
2795 cache_ovly_table_base
= 0;
2799 /* Throw away the cached copy of _ovly_region_table */
2801 simple_free_overlay_region_table ()
2803 if (cache_ovly_region_table
)
2804 free (cache_ovly_region_table
);
2805 cache_novly_regions
= 0;
2806 cache_ovly_region_table
= NULL
;
2807 cache_ovly_region_table_base
= 0;
2811 /* Read an array of ints from the target into a local buffer.
2812 Convert to host order. int LEN is number of ints */
2814 read_target_long_array (memaddr
, myaddr
, len
)
2816 unsigned int *myaddr
;
2819 char *buf
= alloca (len
* TARGET_LONG_BYTES
);
2822 read_memory (memaddr
, buf
, len
* TARGET_LONG_BYTES
);
2823 for (i
= 0; i
< len
; i
++)
2824 myaddr
[i
] = extract_unsigned_integer (TARGET_LONG_BYTES
* i
+ buf
,
2828 /* Find and grab a copy of the target _ovly_table
2829 (and _novlys, which is needed for the table's size) */
2831 simple_read_overlay_table ()
2833 struct minimal_symbol
*msym
;
2835 simple_free_overlay_table ();
2836 msym
= lookup_minimal_symbol ("_novlys", 0, 0);
2838 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
2840 return 0; /* failure */
2841 cache_ovly_table
= (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
2842 if (cache_ovly_table
!= NULL
)
2844 msym
= lookup_minimal_symbol ("_ovly_table", 0, 0);
2847 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
2848 read_target_long_array (cache_ovly_table_base
,
2849 (int *) cache_ovly_table
,
2853 return 0; /* failure */
2856 return 0; /* failure */
2857 return 1; /* SUCCESS */
2861 /* Find and grab a copy of the target _ovly_region_table
2862 (and _novly_regions, which is needed for the table's size) */
2864 simple_read_overlay_region_table ()
2866 struct minimal_symbol
*msym
;
2868 simple_free_overlay_region_table ();
2869 msym
= lookup_minimal_symbol ("_novly_regions", 0, 0);
2871 cache_novly_regions
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
2873 return 0; /* failure */
2874 cache_ovly_region_table
= (void *) xmalloc (cache_novly_regions
* 12);
2875 if (cache_ovly_region_table
!= NULL
)
2877 msym
= lookup_minimal_symbol ("_ovly_region_table", 0, 0);
2880 cache_ovly_region_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
2881 read_target_long_array (cache_ovly_region_table_base
,
2882 (int *) cache_ovly_region_table
,
2883 cache_novly_regions
* 3);
2886 return 0; /* failure */
2889 return 0; /* failure */
2890 return 1; /* SUCCESS */
2894 /* Function: simple_overlay_update_1
2895 A helper function for simple_overlay_update. Assuming a cached copy
2896 of _ovly_table exists, look through it to find an entry whose vma,
2897 lma and size match those of OSECT. Re-read the entry and make sure
2898 it still matches OSECT (else the table may no longer be valid).
2899 Set OSECT's mapped state to match the entry. Return: 1 for
2900 success, 0 for failure. */
2903 simple_overlay_update_1 (osect
)
2904 struct obj_section
*osect
;
2908 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
2909 for (i
= 0; i
< cache_novlys
; i
++)
2910 if (cache_ovly_table
[i
][VMA
] == osect
->the_bfd_section
->vma
&&
2911 cache_ovly_table
[i
][LMA
] == osect
->the_bfd_section
->lma
/* &&
2912 cache_ovly_table[i][SIZE] == size */ )
2914 read_target_long_array (cache_ovly_table_base
+ i
* TARGET_LONG_BYTES
,
2915 (int *) cache_ovly_table
[i
], 4);
2916 if (cache_ovly_table
[i
][VMA
] == osect
->the_bfd_section
->vma
&&
2917 cache_ovly_table
[i
][LMA
] == osect
->the_bfd_section
->lma
/* &&
2918 cache_ovly_table[i][SIZE] == size */ )
2920 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
2923 else /* Warning! Warning! Target's ovly table has changed! */
2929 /* Function: simple_overlay_update
2930 If OSECT is NULL, then update all sections' mapped state
2931 (after re-reading the entire target _ovly_table).
2932 If OSECT is non-NULL, then try to find a matching entry in the
2933 cached ovly_table and update only OSECT's mapped state.
2934 If a cached entry can't be found or the cache isn't valid, then
2935 re-read the entire cache, and go ahead and update all sections. */
2938 simple_overlay_update (osect
)
2939 struct obj_section
*osect
;
2941 struct objfile
*objfile
;
2943 /* Were we given an osect to look up? NULL means do all of them. */
2945 /* Have we got a cached copy of the target's overlay table? */
2946 if (cache_ovly_table
!= NULL
)
2947 /* Does its cached location match what's currently in the symtab? */
2948 if (cache_ovly_table_base
==
2949 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", 0, 0)))
2950 /* Then go ahead and try to look up this single section in the cache */
2951 if (simple_overlay_update_1 (osect
))
2952 /* Found it! We're done. */
2955 /* Cached table no good: need to read the entire table anew.
2956 Or else we want all the sections, in which case it's actually
2957 more efficient to read the whole table in one block anyway. */
2959 if (simple_read_overlay_table () == 0) /* read failed? No table? */
2961 warning ("Failed to read the target overlay mapping table.");
2964 /* Now may as well update all sections, even if only one was requested. */
2965 ALL_OBJSECTIONS (objfile
, osect
)
2966 if (section_is_overlay (osect
->the_bfd_section
))
2970 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
2971 for (i
= 0; i
< cache_novlys
; i
++)
2972 if (cache_ovly_table
[i
][VMA
] == osect
->the_bfd_section
->vma
&&
2973 cache_ovly_table
[i
][LMA
] == osect
->the_bfd_section
->lma
/* &&
2974 cache_ovly_table[i][SIZE] == size */ )
2975 { /* obj_section matches i'th entry in ovly_table */
2976 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
2977 break; /* finished with inner for loop: break out */
2984 _initialize_symfile ()
2986 struct cmd_list_element
*c
;
2988 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
,
2989 "Load symbol table from executable file FILE.\n\
2990 The `file' command can also load symbol tables, as well as setting the file\n\
2991 to execute.", &cmdlist
);
2992 c
->completer
= filename_completer
;
2994 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
,
2995 "Usage: add-symbol-file FILE ADDR\n\
2996 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
2997 ADDR is the starting address of the file's text.",
2999 c
->completer
= filename_completer
;
3001 c
= add_cmd ("add-shared-symbol-files", class_files
,
3002 add_shared_symbol_files_command
,
3003 "Load the symbols from shared objects in the dynamic linker's link map.",
3005 c
= add_alias_cmd ("assf", "add-shared-symbol-files", class_files
, 1,
3008 c
= add_cmd ("load", class_files
, load_command
,
3009 "Dynamically load FILE into the running program, and record its symbols\n\
3010 for access from GDB.", &cmdlist
);
3011 c
->completer
= filename_completer
;
3014 (add_set_cmd ("symbol-reloading", class_support
, var_boolean
,
3015 (char *) &symbol_reloading
,
3016 "Set dynamic symbol table reloading multiple times in one run.",
3020 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3021 "Commands for debugging overlays.", &overlaylist
,
3022 "overlay ", 0, &cmdlist
);
3024 add_com_alias ("ovly", "overlay", class_alias
, 1);
3025 add_com_alias ("ov", "overlay", class_alias
, 1);
3027 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3028 "Assert that an overlay section is mapped.", &overlaylist
);
3030 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3031 "Assert that an overlay section is unmapped.", &overlaylist
);
3033 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3034 "List mappings of overlay sections.", &overlaylist
);
3036 add_cmd ("manual", class_support
, overlay_manual_command
,
3037 "Enable overlay debugging.", &overlaylist
);
3038 add_cmd ("off", class_support
, overlay_off_command
,
3039 "Disable overlay debugging.", &overlaylist
);
3040 add_cmd ("auto", class_support
, overlay_auto_command
,
3041 "Enable automatic overlay debugging.", &overlaylist
);
3042 add_cmd ("load-target", class_support
, overlay_load_command
,
3043 "Read the overlay mapping state from the target.", &overlaylist
);
3045 /* Filename extension to source language lookup table: */
3046 init_filename_language_table ();
3047 c
= add_set_cmd ("extension-language", class_files
, var_string_noescape
,
3049 "Set mapping between filename extension and source language.\n\
3050 Usage: set extension-language .foo bar",
3052 c
->function
.cfunc
= set_ext_lang_command
;
3054 add_info ("extensions", info_ext_lang_command
,
3055 "All filename extensions associated with a source language.");