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, Boston, MA 02111-1307, USA. */
32 #include "breakpoint.h"
34 #include "complaints.h"
36 #include "inferior.h" /* for write_pc */
37 #include "gdb-stabs.h"
41 #include <sys/types.h>
43 #include "gdb_string.h"
56 extern int hpread_pxdb_check
PARAMS ((bfd
*, char *));
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
= {
77 "Replacing old symbols for `%s'", 0, 0
80 struct complaint empty_symtab_complaint
= {
81 "Empty symbol table found for `%s'", 0, 0
84 /* External variables and functions referenced. */
86 extern int info_verbose
;
88 extern void report_transfer_performance
PARAMS ((unsigned long,
91 /* Functions this file defines */
94 static int simple_read_overlay_region_table
PARAMS ((void));
95 static void simple_free_overlay_region_table
PARAMS ((void));
98 static void set_initial_language
PARAMS ((void));
100 static void load_command
PARAMS ((char *, int));
102 static void add_symbol_file_command
PARAMS ((char *, int));
104 static void add_shared_symbol_files_command
PARAMS ((char *, int));
106 static void cashier_psymtab
PARAMS ((struct partial_symtab
*));
108 static int compare_psymbols
PARAMS ((const void *, const void *));
110 static int compare_symbols
PARAMS ((const void *, const void *));
112 bfd
*symfile_bfd_open
PARAMS ((char *));
114 static void find_sym_fns
PARAMS ((struct objfile
*));
116 static void decrement_reading_symtab
PARAMS ((void *));
118 static void overlay_invalidate_all
PARAMS ((void));
120 static int overlay_is_mapped
PARAMS ((struct obj_section
*));
122 void list_overlays_command
PARAMS ((char *, int));
124 void map_overlay_command
PARAMS ((char *, int));
126 void unmap_overlay_command
PARAMS ((char *, int));
128 static void overlay_auto_command
PARAMS ((char *, int));
130 static void overlay_manual_command
PARAMS ((char *, int));
132 static void overlay_off_command
PARAMS ((char *, int));
134 static void overlay_load_command
PARAMS ((char *, int));
136 static void overlay_command
PARAMS ((char *, int));
138 static void simple_free_overlay_table
PARAMS ((void));
140 static void read_target_long_array
PARAMS ((CORE_ADDR
, unsigned int *, int));
142 static int simple_read_overlay_table
PARAMS ((void));
144 static int simple_overlay_update_1
PARAMS ((struct obj_section
*));
146 void _initialize_symfile
PARAMS ((void));
148 /* List of all available sym_fns. On gdb startup, each object file reader
149 calls add_symtab_fns() to register information on each format it is
152 static struct sym_fns
*symtab_fns
= NULL
;
154 /* Flag for whether user will be reloading symbols multiple times.
155 Defaults to ON for VxWorks, otherwise OFF. */
157 #ifdef SYMBOL_RELOADING_DEFAULT
158 int symbol_reloading
= SYMBOL_RELOADING_DEFAULT
;
160 int symbol_reloading
= 0;
163 /* If non-zero, then on HP-UX (i.e., platforms that use somsolib.c),
164 this variable is interpreted as a threshhold. If adding a new
165 library's symbol table to those already known to the debugger would
166 exceed this threshhold, then the shlib's symbols are not added.
168 If non-zero on other platforms, shared library symbols will be added
169 automatically when the inferior is created, new libraries are loaded,
170 or when attaching to the inferior. This is almost always what users
171 will want to have happen; but for very large programs, the startup
172 time will be excessive, and so if this is a problem, the user can
173 clear this flag and then add the shared library symbols as needed.
174 Note that there is a potential for confusion, since if the shared
175 library symbols are not loaded, commands like "info fun" will *not*
176 report all the functions that are actually present.
178 Note that HP-UX interprets this variable to mean, "threshhold size
179 in megabytes, where zero means never add". Other platforms interpret
180 this variable to mean, "always add if non-zero, never add if zero."
183 int auto_solib_add
= 1;
186 /* Since this function is called from within qsort, in an ANSI environment
187 it must conform to the prototype for qsort, which specifies that the
188 comparison function takes two "void *" pointers. */
191 compare_symbols (s1p
, s2p
)
195 register struct symbol
**s1
, **s2
;
197 s1
= (struct symbol
**) s1p
;
198 s2
= (struct symbol
**) s2p
;
200 return (STRCMP (SYMBOL_NAME (*s1
), SYMBOL_NAME (*s2
)));
207 compare_psymbols -- compare two partial symbols by name
211 Given pointers to pointers to two partial symbol table entries,
212 compare them by name and return -N, 0, or +N (ala strcmp).
213 Typically used by sorting routines like qsort().
217 Does direct compare of first two characters before punting
218 and passing to strcmp for longer compares. Note that the
219 original version had a bug whereby two null strings or two
220 identically named one character strings would return the
221 comparison of memory following the null byte.
226 compare_psymbols (s1p
, s2p
)
230 register char *st1
= SYMBOL_NAME (*(struct partial_symbol
**) s1p
);
231 register char *st2
= SYMBOL_NAME (*(struct partial_symbol
**) s2p
);
233 if ((st1
[0] - st2
[0]) || !st1
[0])
235 return (st1
[0] - st2
[0]);
237 else if ((st1
[1] - st2
[1]) || !st1
[1])
239 return (st1
[1] - st2
[1]);
243 /* Note: I replaced the STRCMP line (commented out below)
244 * with a simpler "strcmp()" which compares the 2 strings
245 * from the beginning. (STRCMP is a macro which first compares
246 * the initial characters, then falls back on strcmp).
247 * The reason is that the STRCMP line was tickling a C compiler
248 * bug on HP-UX 10.30, which is avoided with the simpler
249 * code. The performance gain from the more complicated code
250 * is negligible, given that we have already checked the
251 * initial 2 characters above. I reported the compiler bug,
252 * and once it is fixed the original line can be put back. RT
254 /* return ( STRCMP (st1 + 2, st2 + 2)); */
255 return ( strcmp (st1
, st2
));
260 sort_pst_symbols (pst
)
261 struct partial_symtab
*pst
;
263 /* Sort the global list; don't sort the static list */
265 qsort (pst
-> objfile
-> global_psymbols
.list
+ pst
-> globals_offset
,
266 pst
-> n_global_syms
, sizeof (struct partial_symbol
*),
270 /* Call sort_block_syms to sort alphabetically the symbols of one block. */
274 register struct block
*b
;
276 qsort (&BLOCK_SYM (b
, 0), BLOCK_NSYMS (b
),
277 sizeof (struct symbol
*), compare_symbols
);
280 /* Call sort_symtab_syms to sort alphabetically
281 the symbols of each block of one symtab. */
285 register struct symtab
*s
;
287 register struct blockvector
*bv
;
290 register struct block
*b
;
294 bv
= BLOCKVECTOR (s
);
295 nbl
= BLOCKVECTOR_NBLOCKS (bv
);
296 for (i
= 0; i
< nbl
; i
++)
298 b
= BLOCKVECTOR_BLOCK (bv
, i
);
299 if (BLOCK_SHOULD_SORT (b
))
304 /* Make a null terminated copy of the string at PTR with SIZE characters in
305 the obstack pointed to by OBSTACKP . Returns the address of the copy.
306 Note that the string at PTR does not have to be null terminated, I.E. it
307 may be part of a larger string and we are only saving a substring. */
310 obsavestring (ptr
, size
, obstackp
)
313 struct obstack
*obstackp
;
315 register char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
316 /* Open-coded memcpy--saves function call time. These strings are usually
317 short. FIXME: Is this really still true with a compiler that can
320 register char *p1
= ptr
;
321 register char *p2
= p
;
322 char *end
= ptr
+ size
;
330 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
331 in the obstack pointed to by OBSTACKP. */
334 obconcat (obstackp
, s1
, s2
, s3
)
335 struct obstack
*obstackp
;
336 const char *s1
, *s2
, *s3
;
338 register int len
= strlen (s1
) + strlen (s2
) + strlen (s3
) + 1;
339 register char *val
= (char *) obstack_alloc (obstackp
, len
);
346 /* True if we are nested inside psymtab_to_symtab. */
348 int currently_reading_symtab
= 0;
351 decrement_reading_symtab (dummy
)
354 currently_reading_symtab
--;
357 /* Get the symbol table that corresponds to a partial_symtab.
358 This is fast after the first time you do it. In fact, there
359 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
363 psymtab_to_symtab (pst
)
364 register struct partial_symtab
*pst
;
366 /* If it's been looked up before, return it. */
370 /* If it has not yet been read in, read it. */
373 struct cleanup
*back_to
= make_cleanup (decrement_reading_symtab
, NULL
);
374 currently_reading_symtab
++;
375 (*pst
->read_symtab
) (pst
);
376 do_cleanups (back_to
);
382 /* Initialize entry point information for this objfile. */
385 init_entry_point_info (objfile
)
386 struct objfile
*objfile
;
388 /* Save startup file's range of PC addresses to help blockframe.c
389 decide where the bottom of the stack is. */
391 if (bfd_get_file_flags (objfile
-> obfd
) & EXEC_P
)
393 /* Executable file -- record its entry point so we'll recognize
394 the startup file because it contains the entry point. */
395 objfile
-> ei
.entry_point
= bfd_get_start_address (objfile
-> obfd
);
399 /* Examination of non-executable.o files. Short-circuit this stuff. */
400 objfile
-> ei
.entry_point
= INVALID_ENTRY_POINT
;
402 objfile
-> ei
.entry_file_lowpc
= INVALID_ENTRY_LOWPC
;
403 objfile
-> ei
.entry_file_highpc
= INVALID_ENTRY_HIGHPC
;
404 objfile
-> ei
.entry_func_lowpc
= INVALID_ENTRY_LOWPC
;
405 objfile
-> ei
.entry_func_highpc
= INVALID_ENTRY_HIGHPC
;
406 objfile
-> ei
.main_func_lowpc
= INVALID_ENTRY_LOWPC
;
407 objfile
-> ei
.main_func_highpc
= INVALID_ENTRY_HIGHPC
;
410 /* Get current entry point address. */
413 entry_point_address()
415 return symfile_objfile
? symfile_objfile
->ei
.entry_point
: 0;
418 /* Remember the lowest-addressed loadable section we've seen.
419 This function is called via bfd_map_over_sections.
421 In case of equal vmas, the section with the largest size becomes the
422 lowest-addressed loadable section.
424 If the vmas and sizes are equal, the last section is considered the
425 lowest-addressed loadable section. */
428 find_lowest_section (abfd
, sect
, obj
)
433 asection
**lowest
= (asection
**)obj
;
435 if (0 == (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
))
438 *lowest
= sect
; /* First loadable section */
439 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
440 *lowest
= sect
; /* A lower loadable section */
441 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
442 && (bfd_section_size (abfd
, (*lowest
))
443 <= bfd_section_size (abfd
, sect
)))
447 /* Parse the user's idea of an offset for dynamic linking, into our idea
448 of how to represent it for fast symbol reading. This is the default
449 version of the sym_fns.sym_offsets function for symbol readers that
450 don't need to do anything special. It allocates a section_offsets table
451 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
453 struct section_offsets
*
454 default_symfile_offsets (objfile
, addr
)
455 struct objfile
*objfile
;
458 struct section_offsets
*section_offsets
;
461 objfile
->num_sections
= SECT_OFF_MAX
;
462 section_offsets
= (struct section_offsets
*)
463 obstack_alloc (&objfile
-> psymbol_obstack
, SIZEOF_SECTION_OFFSETS
);
465 for (i
= 0; i
< SECT_OFF_MAX
; i
++)
466 ANOFFSET (section_offsets
, i
) = addr
;
468 return section_offsets
;
472 /* Process a symbol file, as either the main file or as a dynamically
475 NAME is the file name (which will be tilde-expanded and made
476 absolute herein) (but we don't free or modify NAME itself).
477 FROM_TTY says how verbose to be. MAINLINE specifies whether this
478 is the main symbol file, or whether it's an extra symbol file such
479 as dynamically loaded code. If !mainline, ADDR is the address
480 where the text segment was loaded. If VERBO, the caller has printed
481 a verbose message about the symbol reading (and complaints can be
482 more terse about it). */
485 syms_from_objfile (objfile
, addr
, mainline
, verbo
)
486 struct objfile
*objfile
;
491 struct section_offsets
*section_offsets
;
492 asection
*lowest_sect
;
493 struct cleanup
*old_chain
;
495 init_entry_point_info (objfile
);
496 find_sym_fns (objfile
);
498 /* Make sure that partially constructed symbol tables will be cleaned up
499 if an error occurs during symbol reading. */
500 old_chain
= make_cleanup ((make_cleanup_func
) free_objfile
, objfile
);
504 /* We will modify the main symbol table, make sure that all its users
505 will be cleaned up if an error occurs during symbol reading. */
506 make_cleanup ((make_cleanup_func
) clear_symtab_users
, 0);
508 /* Since no error yet, throw away the old symbol table. */
510 if (symfile_objfile
!= NULL
)
512 free_objfile (symfile_objfile
);
513 symfile_objfile
= NULL
;
516 /* Currently we keep symbols from the add-symbol-file command.
517 If the user wants to get rid of them, they should do "symbol-file"
518 without arguments first. Not sure this is the best behavior
521 (*objfile
-> sf
-> sym_new_init
) (objfile
);
524 /* Convert addr into an offset rather than an absolute address.
525 We find the lowest address of a loaded segment in the objfile,
526 and assume that <addr> is where that got loaded. Due to historical
527 precedent, we warn if that doesn't happen to be a text segment. */
531 addr
= 0; /* No offset from objfile addresses. */
535 lowest_sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
536 if (lowest_sect
== NULL
)
537 bfd_map_over_sections (objfile
->obfd
, find_lowest_section
,
540 if (lowest_sect
== NULL
)
541 warning ("no loadable sections found in added symbol-file %s",
543 else if ((bfd_get_section_flags (objfile
->obfd
, lowest_sect
) & SEC_CODE
)
545 /* FIXME-32x64--assumes bfd_vma fits in long. */
546 warning ("Lowest section in %s is %s at 0x%lx",
548 bfd_section_name (objfile
->obfd
, lowest_sect
),
549 (unsigned long) bfd_section_vma (objfile
->obfd
, lowest_sect
));
552 addr
-= bfd_section_vma (objfile
->obfd
, lowest_sect
);
555 /* Initialize symbol reading routines for this objfile, allow complaints to
556 appear for this new file, and record how verbose to be, then do the
557 initial symbol reading for this file. */
559 (*objfile
-> sf
-> sym_init
) (objfile
);
560 clear_complaints (1, verbo
);
562 section_offsets
= (*objfile
-> sf
-> sym_offsets
) (objfile
, addr
);
563 objfile
->section_offsets
= section_offsets
;
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 algorythm 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 for (s
= objfile
->sections
; s
< objfile
->sections_end
; ++s
)
590 s
->addr
-= s
->offset
;
592 s
->endaddr
-= s
->offset
;
597 #endif /* not IBM6000_TARGET */
599 (*objfile
-> sf
-> sym_read
) (objfile
, section_offsets
, 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 dependant code
626 a crack at the new symbols. For instance, this could be used to update the
627 values of target-specific symbols GDB needs to keep track of (such as
628 _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
);
703 #ifdef GDB_TARGET_IS_HPPA
705 /********* TARGET SPECIFIC CODE (HACK!) **********
707 * The following code is HP-specific. The "right" way of
708 * doing this is unknown, but we bet would involve a target-
709 * specific pre-file-load check using a generic mechanism.
711 /* elz: I moved this code from inside the symfile_bfd_open function
712 this way we don't have to worry about recursion.
713 I also have taken out the call to pxdb from within the check
714 for pxdb processing. Seemed two logically unrelated things,
715 and I needed a pure checking later on anyway.
718 if( hpread_pxdb_needed( abfd
))
721 * This file has not been pre-processed.
725 if (hpread_call_pxdb(name
))
728 * call above has used "system" to pre-process
729 * the on-disk file, so we now need to close
730 * and re-open the file.
732 bfd_close (abfd
); /* This also closes 'desc', */
733 /* hence the recursion. */
734 abfd
= symfile_bfd_open( name
);
736 else /* we fail miserably without pxdb!!!*/
737 /* the warning to the user has already been given
738 from within the call_pxdb function
740 error("Command ignored.\n");
743 /*************** END HACK ********************/
748 if ((have_full_symbols () || have_partial_symbols ())
751 && !query ("Load new symbol table from \"%s\"? ", name
))
752 error ("Not confirmed.");
754 objfile
= allocate_objfile (abfd
, mapped
, user_loaded
, is_solib
);
756 /* If the objfile uses a mapped symbol file, and we have a psymtab for
757 it, then skip reading any symbols at this time. */
759 if ((objfile
-> flags
& OBJF_MAPPED
) && (objfile
-> flags
& OBJF_SYMS
))
761 /* We mapped in an existing symbol table file that already has had
762 initial symbol reading performed, so we can skip that part. Notify
763 the user that instead of reading the symbols, they have been mapped.
765 if (from_tty
|| info_verbose
)
767 printf_filtered ("Mapped symbols for %s...", name
);
769 gdb_flush (gdb_stdout
);
771 init_entry_point_info (objfile
);
772 find_sym_fns (objfile
);
776 /* We either created a new mapped symbol table, mapped an existing
777 symbol table file which has not had initial symbol reading
778 performed, or need to read an unmapped symbol table. */
779 if (from_tty
|| info_verbose
)
781 if (pre_add_symbol_hook
)
782 pre_add_symbol_hook (name
);
785 printf_filtered ("Reading symbols from %s...", name
);
787 gdb_flush (gdb_stdout
);
790 syms_from_objfile (objfile
, addr
, mainline
, from_tty
);
793 /* We now have at least a partial symbol table. Check to see if the
794 user requested that all symbols be read on initial access via either
795 the gdb startup command line or on a per symbol file basis. Expand
796 all partial symbol tables for this objfile if so. */
798 if (readnow
|| readnow_symbol_files
)
800 if (from_tty
|| info_verbose
)
802 printf_filtered ("expanding to full symbols...");
804 gdb_flush (gdb_stdout
);
807 for (psymtab
= objfile
-> psymtabs
;
809 psymtab
= psymtab
-> next
)
811 psymtab_to_symtab (psymtab
);
815 if (from_tty
|| info_verbose
)
817 if (post_add_symbol_hook
)
818 post_add_symbol_hook ();
821 printf_filtered ("done.\n");
822 gdb_flush (gdb_stdout
);
826 new_symfile_objfile (objfile
, mainline
, from_tty
);
828 target_new_objfile (objfile
);
833 /* This is the symbol-file command. Read the file, analyze its
834 symbols, and add a struct symtab to a symtab list. The syntax of
835 the command is rather bizarre--(1) buildargv implements various
836 quoting conventions which are undocumented and have little or
837 nothing in common with the way things are quoted (or not quoted)
838 elsewhere in GDB, (2) options are used, which are not generally
839 used in GDB (perhaps "set mapped on", "set readnow on" would be
840 better), (3) the order of options matters, which is contrary to GNU
841 conventions (because it is confusing and inconvenient). */
844 symbol_file_command (args
, from_tty
)
850 CORE_ADDR text_relocation
= 0; /* text_relocation */
851 struct cleanup
*cleanups
;
859 if ((have_full_symbols () || have_partial_symbols ())
861 && !query ("Discard symbol table from `%s'? ",
862 symfile_objfile
-> name
))
863 error ("Not confirmed.");
864 free_all_objfiles ();
866 /* solib descriptors may have handles to objfiles. Since their
867 storage has just been released, we'd better wipe the solib
870 #if defined(SOLIB_RESTART)
874 symfile_objfile
= NULL
;
877 printf_unfiltered ("No symbol file now.\n");
880 RESET_HP_UX_GLOBALS ();
885 if ((argv
= buildargv (args
)) == NULL
)
889 cleanups
= make_cleanup ((make_cleanup_func
) freeargv
, (char *) argv
);
890 while (*argv
!= NULL
)
892 if (STREQ (*argv
, "-mapped"))
896 else if (STREQ (*argv
, "-readnow"))
900 else if (**argv
== '-')
902 error ("unknown option `%s'", *argv
);
910 /* this is for rombug remote only, to get the text relocation by
911 using link command */
912 p
= strrchr(name
, '/');
916 target_link(p
, &text_relocation
);
918 if (text_relocation
== (CORE_ADDR
)0)
920 else if (text_relocation
== (CORE_ADDR
)-1)
922 symbol_file_add (name
, from_tty
, (CORE_ADDR
)0,
923 1, mapped
, readnow
, 1, 0);
925 RESET_HP_UX_GLOBALS ();
929 symbol_file_add (name
, from_tty
, (CORE_ADDR
)text_relocation
,
930 0, mapped
, readnow
, 1, 0);
932 /* Getting new symbols may change our opinion about what is
934 reinit_frame_cache ();
936 set_initial_language ();
943 error ("no symbol file name was specified");
945 TUIDO(((TuiOpaqueFuncPtr
)tuiDisplayMainFunction
));
946 do_cleanups (cleanups
);
950 /* Set the initial language.
952 A better solution would be to record the language in the psymtab when reading
953 partial symbols, and then use it (if known) to set the language. This would
954 be a win for formats that encode the language in an easily discoverable place,
955 such as DWARF. For stabs, we can jump through hoops looking for specially
956 named symbols or try to intuit the language from the specific type of stabs
957 we find, but we can't do that until later when we read in full symbols.
961 set_initial_language ()
963 struct partial_symtab
*pst
;
964 enum language lang
= language_unknown
;
966 pst
= find_main_psymtab ();
969 if (pst
-> filename
!= NULL
)
971 lang
= deduce_language_from_filename (pst
-> filename
);
973 if (lang
== language_unknown
)
975 /* Make C the default language */
979 expected_language
= current_language
; /* Don't warn the user */
983 /* Open file specified by NAME and hand it off to BFD for preliminary
984 analysis. Result is a newly initialized bfd *, which includes a newly
985 malloc'd` copy of NAME (tilde-expanded and made absolute).
986 In case of trouble, error() is called. */
989 symfile_bfd_open (name
)
998 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy */
1000 /* Look down path for it, allocate 2nd new malloc'd copy. */
1001 desc
= openp (getenv ("PATH"), 1, name
, O_RDONLY
| O_BINARY
, 0, &absolute_name
);
1002 #if defined(__GO32__) || defined(_WIN32)
1005 char *exename
= alloca (strlen (name
) + 5);
1006 strcat (strcpy (exename
, name
), ".exe");
1007 desc
= openp (getenv ("PATH"), 1, exename
, O_RDONLY
| O_BINARY
,
1013 make_cleanup (free
, name
);
1014 perror_with_name (name
);
1016 free (name
); /* Free 1st new malloc'd copy */
1017 name
= absolute_name
; /* Keep 2nd malloc'd copy in bfd */
1018 /* It'll be freed in free_objfile(). */
1020 sym_bfd
= bfd_fdopenr (name
, gnutarget
, desc
);
1024 make_cleanup (free
, name
);
1025 error ("\"%s\": can't open to read symbols: %s.", name
,
1026 bfd_errmsg (bfd_get_error ()));
1028 sym_bfd
->cacheable
= true;
1030 if (!bfd_check_format (sym_bfd
, bfd_object
))
1032 /* FIXME: should be checking for errors from bfd_close (for one thing,
1033 on error it does not free all the storage associated with the
1035 bfd_close (sym_bfd
); /* This also closes desc */
1036 make_cleanup (free
, name
);
1037 error ("\"%s\": can't read symbols: %s.", name
,
1038 bfd_errmsg (bfd_get_error ()));
1043 /********* TARGET SPECIFIC CODE (HACK!) **********
1045 * The following code is HP-specific. The "right" way of
1046 * doing this is unknown, but we bet would involve a target-
1047 * specific pre-file-load check using a generic mechanism.
1049 static prevent_recursion
= 0; /* Needed for hack below! HP-specific */
1051 if( prevent_recursion
== 0 ) {
1052 if( hpread_pxdb_needed (sym_bfd
, name
)) {
1054 * This file has not been pre-processed.
1058 if (hpread_call_pxdb(name
))
1061 * call above has used "system" to pre-process
1062 * the on-disk file, so we now need to close
1063 * and re-open the file.
1065 bfd_close (sym_bfd
); /* This also closes 'desc', */
1066 /* hence the recursion. */
1067 prevent_recursion
++;
1068 sym_bfd
= symfile_bfd_open( name
);
1069 prevent_recursion
--;
1074 /*************** END HACK ********************/
1080 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1081 startup by the _initialize routine in each object file format reader,
1082 to register information about each format the the reader is prepared
1089 sf
->next
= symtab_fns
;
1094 /* Initialize to read symbols from the symbol file sym_bfd. It either
1095 returns or calls error(). The result is an initialized struct sym_fns
1096 in the objfile structure, that contains cached information about the
1100 find_sym_fns (objfile
)
1101 struct objfile
*objfile
;
1104 enum bfd_flavour our_flavour
= bfd_get_flavour (objfile
-> obfd
);
1105 char *our_target
= bfd_get_target (objfile
-> obfd
);
1107 /* Special kludge for RS/6000 and PowerMac. See xcoffread.c. */
1108 if (STREQ (our_target
, "aixcoff-rs6000") ||
1109 STREQ (our_target
, "xcoff-powermac"))
1110 our_flavour
= (enum bfd_flavour
)-1;
1112 /* Special kludge for apollo. See dstread.c. */
1113 if (STREQN (our_target
, "apollo", 6))
1114 our_flavour
= (enum bfd_flavour
)-2;
1116 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
-> next
)
1118 if (our_flavour
== sf
-> sym_flavour
)
1124 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
1125 bfd_get_target (objfile
-> obfd
));
1128 /* This function runs the load command of our current target. */
1131 load_command (arg
, from_tty
)
1136 arg
= get_exec_file (1);
1137 target_load (arg
, from_tty
);
1140 /* This version of "load" should be usable for any target. Currently
1141 it is just used for remote targets, not inftarg.c or core files,
1142 on the theory that only in that case is it useful.
1144 Avoiding xmodem and the like seems like a win (a) because we don't have
1145 to worry about finding it, and (b) On VMS, fork() is very slow and so
1146 we don't want to run a subprocess. On the other hand, I'm not sure how
1147 performance compares. */
1148 #define GENERIC_LOAD_CHUNK 256
1149 #define VALIDATE_DOWNLOAD 0
1151 generic_load (filename
, from_tty
)
1155 struct cleanup
*old_cleanups
;
1158 time_t start_time
, end_time
; /* Start and end times of download */
1159 unsigned long data_count
= 0; /* Number of bytes transferred to memory */
1161 unsigned long load_offset
= 0; /* offset to add to vma for each section */
1162 char buf
[GENERIC_LOAD_CHUNK
+8];
1163 #if VALIDATE_DOWNLOAD
1164 char verify_buffer
[GENERIC_LOAD_CHUNK
+8] ;
1167 /* enable user to specify address for downloading as 2nd arg to load */
1168 n
= sscanf(filename
, "%s 0x%lx", buf
, &load_offset
);
1174 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
1175 if (loadfile_bfd
== NULL
)
1177 perror_with_name (filename
);
1180 /* FIXME: should be checking for errors from bfd_close (for one thing,
1181 on error it does not free all the storage associated with the
1183 old_cleanups
= make_cleanup ((make_cleanup_func
) bfd_close
, loadfile_bfd
);
1185 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
1187 error ("\"%s\" is not an object file: %s", filename
,
1188 bfd_errmsg (bfd_get_error ()));
1191 start_time
= time (NULL
);
1193 for (s
= loadfile_bfd
->sections
; s
; s
= s
->next
)
1195 if (s
->flags
& SEC_LOAD
)
1199 size
= bfd_get_section_size_before_reloc (s
);
1203 struct cleanup
*old_chain
;
1205 unsigned long l
= size
;
1211 l
= l
> GENERIC_LOAD_CHUNK
? GENERIC_LOAD_CHUNK
: l
;
1213 buffer
= xmalloc (size
);
1214 old_chain
= make_cleanup (free
, buffer
);
1219 /* Is this really necessary? I guess it gives the user something
1220 to look at during a long download. */
1221 printf_filtered ("Loading section %s, size 0x%lx lma ",
1222 bfd_get_section_name (loadfile_bfd
, s
),
1223 (unsigned long) size
);
1224 print_address_numeric (lma
, 1, gdb_stdout
);
1225 printf_filtered ("\n");
1227 bfd_get_section_contents (loadfile_bfd
, s
, buffer
, 0, size
);
1229 sect
= (char *) bfd_get_section_name (loadfile_bfd
, s
);
1233 len
= (size
- sent
) < l
? (size
- sent
) : l
;
1235 err
= target_write_memory (lma
, buffer
, len
);
1236 if (ui_load_progress_hook
)
1237 if (ui_load_progress_hook (sect
, sent
))
1238 error ("Canceled the download");
1239 #if VALIDATE_DOWNLOAD
1240 /* Broken memories and broken monitors manifest themselves
1241 here when bring new computers to life.
1242 This doubles already slow downloads.
1246 target_read_memory(lma
,verify_buffer
,len
) ;
1247 if (0 != bcmp(buffer
,verify_buffer
,len
))
1248 error("Download verify failed at %08x",
1249 (unsigned long)lma
) ;
1257 while (err
== 0 && sent
< size
);
1260 error ("Memory access error while loading section %s.",
1261 bfd_get_section_name (loadfile_bfd
, s
));
1263 do_cleanups (old_chain
);
1268 end_time
= time (NULL
);
1270 unsigned long entry
;
1271 entry
= bfd_get_start_address(loadfile_bfd
) ;
1272 printf_filtered ("Start address 0x%lx , load size %d\n", entry
,data_count
);
1273 /* We were doing this in remote-mips.c, I suspect it is right
1274 for other targets too. */
1278 /* FIXME: are we supposed to call symbol_file_add or not? According to
1279 a comment from remote-mips.c (where a call to symbol_file_add was
1280 commented out), making the call confuses GDB if more than one file is
1281 loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c
1284 report_transfer_performance (data_count
, start_time
, end_time
);
1286 do_cleanups (old_cleanups
);
1289 /* Report how fast the transfer went. */
1292 report_transfer_performance (data_count
, start_time
, end_time
)
1293 unsigned long data_count
;
1294 time_t start_time
, end_time
;
1296 printf_filtered ("Transfer rate: ");
1297 if (end_time
!= start_time
)
1298 printf_filtered ("%d bits/sec",
1299 (data_count
* 8) / (end_time
- start_time
));
1301 printf_filtered ("%d bits in <1 sec", (data_count
* 8));
1302 printf_filtered (".\n");
1305 /* This function allows the addition of incrementally linked object files.
1306 It does not modify any state in the target, only in the debugger. */
1310 add_symbol_file_command (args
, from_tty
)
1315 CORE_ADDR text_addr
;
1324 error ("add-symbol-file takes a file name and an address");
1327 /* Make a copy of the string that we can safely write into. */
1329 args
= strdup (args
);
1330 make_cleanup (free
, args
);
1332 /* Pick off any -option args and the file name. */
1334 while ((*args
!= '\000') && (name
== NULL
))
1336 while (isspace (*args
)) {args
++;}
1338 while ((*args
!= '\000') && !isspace (*args
)) {args
++;}
1339 if (*args
!= '\000')
1347 else if (STREQ (arg
, "-mapped"))
1351 else if (STREQ (arg
, "-readnow"))
1357 error ("unknown option `%s'", arg
);
1361 /* After picking off any options and the file name, args should be
1362 left pointing at the remainder of the command line, which should
1363 be the address expression to evaluate. */
1367 error ("add-symbol-file takes a file name");
1369 name
= tilde_expand (name
);
1370 make_cleanup (free
, name
);
1372 if (*args
!= '\000')
1374 text_addr
= parse_and_eval_address (args
);
1378 target_link(name
, &text_addr
);
1379 if (text_addr
== (CORE_ADDR
)-1)
1380 error("Don't know how to get text start location for this file");
1383 /* FIXME-32x64: Assumes text_addr fits in a long. */
1385 && (!query ("add symbol table from file \"%s\" at text_addr = %s?\n",
1386 name
, local_hex_string ((unsigned long)text_addr
))))
1387 error ("Not confirmed.");
1389 symbol_file_add (name
, from_tty
, text_addr
, 0, mapped
, readnow
,
1390 1, /* user_loaded */
1391 0); /* We'll guess it's ! is_solib */
1393 /* Getting new symbols may change our opinion about what is
1395 reinit_frame_cache ();
1399 add_shared_symbol_files_command (args
, from_tty
)
1403 #ifdef ADD_SHARED_SYMBOL_FILES
1404 ADD_SHARED_SYMBOL_FILES (args
, from_tty
);
1406 error ("This command is not available in this configuration of GDB.");
1410 /* Re-read symbols if a symbol-file has changed. */
1414 struct objfile
*objfile
;
1417 struct stat new_statbuf
;
1420 /* With the addition of shared libraries, this should be modified,
1421 the load time should be saved in the partial symbol tables, since
1422 different tables may come from different source files. FIXME.
1423 This routine should then walk down each partial symbol table
1424 and see if the symbol table that it originates from has been changed */
1426 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
) {
1427 if (objfile
->obfd
) {
1428 #ifdef IBM6000_TARGET
1429 /* If this object is from a shared library, then you should
1430 stat on the library name, not member name. */
1432 if (objfile
->obfd
->my_archive
)
1433 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
1436 res
= stat (objfile
->name
, &new_statbuf
);
1438 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1439 printf_filtered ("`%s' has disappeared; keeping its symbols.\n",
1443 new_modtime
= new_statbuf
.st_mtime
;
1444 if (new_modtime
!= objfile
->mtime
)
1446 struct cleanup
*old_cleanups
;
1447 struct section_offsets
*offsets
;
1449 int section_offsets_size
;
1450 char *obfd_filename
;
1452 printf_filtered ("`%s' has changed; re-reading symbols.\n",
1455 /* There are various functions like symbol_file_add,
1456 symfile_bfd_open, syms_from_objfile, etc., which might
1457 appear to do what we want. But they have various other
1458 effects which we *don't* want. So we just do stuff
1459 ourselves. We don't worry about mapped files (for one thing,
1460 any mapped file will be out of date). */
1462 /* If we get an error, blow away this objfile (not sure if
1463 that is the correct response for things like shared
1465 old_cleanups
= make_cleanup ((make_cleanup_func
) free_objfile
,
1467 /* We need to do this whenever any symbols go away. */
1468 make_cleanup ((make_cleanup_func
) clear_symtab_users
, 0);
1470 /* Clean up any state BFD has sitting around. We don't need
1471 to close the descriptor but BFD lacks a way of closing the
1472 BFD without closing the descriptor. */
1473 obfd_filename
= bfd_get_filename (objfile
->obfd
);
1474 if (!bfd_close (objfile
->obfd
))
1475 error ("Can't close BFD for %s: %s", objfile
->name
,
1476 bfd_errmsg (bfd_get_error ()));
1477 objfile
->obfd
= bfd_openr (obfd_filename
, gnutarget
);
1478 if (objfile
->obfd
== NULL
)
1479 error ("Can't open %s to read symbols.", objfile
->name
);
1480 /* bfd_openr sets cacheable to true, which is what we want. */
1481 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
1482 error ("Can't read symbols from %s: %s.", objfile
->name
,
1483 bfd_errmsg (bfd_get_error ()));
1485 /* Save the offsets, we will nuke them with the rest of the
1487 num_offsets
= objfile
->num_sections
;
1488 section_offsets_size
=
1489 sizeof (struct section_offsets
)
1490 + sizeof (objfile
->section_offsets
->offsets
) * num_offsets
;
1491 offsets
= (struct section_offsets
*) alloca (section_offsets_size
);
1492 memcpy (offsets
, objfile
->section_offsets
, section_offsets_size
);
1494 /* Nuke all the state that we will re-read. Much of the following
1495 code which sets things to NULL really is necessary to tell
1496 other parts of GDB that there is nothing currently there. */
1498 /* FIXME: Do we have to free a whole linked list, or is this
1500 if (objfile
->global_psymbols
.list
)
1501 mfree (objfile
->md
, objfile
->global_psymbols
.list
);
1502 memset (&objfile
-> global_psymbols
, 0,
1503 sizeof (objfile
-> global_psymbols
));
1504 if (objfile
->static_psymbols
.list
)
1505 mfree (objfile
->md
, objfile
->static_psymbols
.list
);
1506 memset (&objfile
-> static_psymbols
, 0,
1507 sizeof (objfile
-> static_psymbols
));
1509 /* Free the obstacks for non-reusable objfiles */
1510 obstack_free (&objfile
-> psymbol_cache
.cache
, 0);
1511 memset (&objfile
-> psymbol_cache
, 0,
1512 sizeof (objfile
-> psymbol_cache
));
1513 obstack_free (&objfile
-> psymbol_obstack
, 0);
1514 obstack_free (&objfile
-> symbol_obstack
, 0);
1515 obstack_free (&objfile
-> type_obstack
, 0);
1516 objfile
->sections
= NULL
;
1517 objfile
->symtabs
= NULL
;
1518 objfile
->psymtabs
= NULL
;
1519 objfile
->free_psymtabs
= NULL
;
1520 objfile
->msymbols
= NULL
;
1521 objfile
->minimal_symbol_count
= 0;
1522 objfile
->fundamental_types
= NULL
;
1523 if (objfile
-> sf
!= NULL
)
1525 (*objfile
-> sf
-> sym_finish
) (objfile
);
1528 /* We never make this a mapped file. */
1529 objfile
-> md
= NULL
;
1530 /* obstack_specify_allocation also initializes the obstack so
1532 obstack_specify_allocation (&objfile
-> psymbol_cache
.cache
, 0, 0,
1534 obstack_specify_allocation (&objfile
-> psymbol_obstack
, 0, 0,
1536 obstack_specify_allocation (&objfile
-> symbol_obstack
, 0, 0,
1538 obstack_specify_allocation (&objfile
-> type_obstack
, 0, 0,
1540 if (build_objfile_section_table (objfile
))
1542 error ("Can't find the file sections in `%s': %s",
1543 objfile
-> name
, bfd_errmsg (bfd_get_error ()));
1546 /* We use the same section offsets as from last time. I'm not
1547 sure whether that is always correct for shared libraries. */
1548 objfile
->section_offsets
= (struct section_offsets
*)
1549 obstack_alloc (&objfile
-> psymbol_obstack
, section_offsets_size
);
1550 memcpy (objfile
->section_offsets
, offsets
, section_offsets_size
);
1551 objfile
->num_sections
= num_offsets
;
1553 /* What the hell is sym_new_init for, anyway? The concept of
1554 distinguishing between the main file and additional files
1555 in this way seems rather dubious. */
1556 if (objfile
== symfile_objfile
)
1558 (*objfile
->sf
->sym_new_init
) (objfile
);
1560 RESET_HP_UX_GLOBALS ();
1564 (*objfile
->sf
->sym_init
) (objfile
);
1565 clear_complaints (1, 1);
1566 /* The "mainline" parameter is a hideous hack; I think leaving it
1567 zero is OK since dbxread.c also does what it needs to do if
1568 objfile->global_psymbols.size is 0. */
1569 (*objfile
->sf
->sym_read
) (objfile
, objfile
->section_offsets
, 0);
1570 if (!have_partial_symbols () && !have_full_symbols ())
1573 printf_filtered ("(no debugging symbols found)\n");
1576 objfile
-> flags
|= OBJF_SYMS
;
1578 /* We're done reading the symbol file; finish off complaints. */
1579 clear_complaints (0, 1);
1581 /* Getting new symbols may change our opinion about what is
1584 reinit_frame_cache ();
1586 /* Discard cleanups as symbol reading was successful. */
1587 discard_cleanups (old_cleanups
);
1589 /* If the mtime has changed between the time we set new_modtime
1590 and now, we *want* this to be out of date, so don't call stat
1592 objfile
->mtime
= new_modtime
;
1595 /* Call this after reading in a new symbol table to give target
1596 dependant code a crack at the new symbols. For instance, this
1597 could be used to update the values of target-specific symbols GDB
1598 needs to keep track of (such as _sigtramp, or whatever). */
1600 TARGET_SYMFILE_POSTREAD (objfile
);
1606 clear_symtab_users ();
1614 } filename_language
;
1616 static filename_language
* filename_language_table
;
1617 static int fl_table_size
, fl_table_next
;
1620 add_filename_language (ext
, lang
)
1624 if (fl_table_next
>= fl_table_size
)
1626 fl_table_size
+= 10;
1627 filename_language_table
= realloc (filename_language_table
,
1631 filename_language_table
[fl_table_next
].ext
= strsave (ext
);
1632 filename_language_table
[fl_table_next
].lang
= lang
;
1636 static char *ext_args
;
1639 set_ext_lang_command (args
, from_tty
)
1644 char *cp
= ext_args
;
1647 /* First arg is filename extension, starting with '.' */
1649 error ("'%s': Filename extension must begin with '.'", ext_args
);
1651 /* Find end of first arg. */
1652 while (*cp
&& !isspace (*cp
))
1656 error ("'%s': two arguments required -- filename extension and language",
1659 /* Null-terminate first arg */
1662 /* Find beginning of second arg, which should be a source language. */
1663 while (*cp
&& isspace (*cp
))
1667 error ("'%s': two arguments required -- filename extension and language",
1670 /* Lookup the language from among those we know. */
1671 lang
= language_enum (cp
);
1673 /* Now lookup the filename extension: do we already know it? */
1674 for (i
= 0; i
< fl_table_next
; i
++)
1675 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
1678 if (i
>= fl_table_next
)
1680 /* new file extension */
1681 add_filename_language (ext_args
, lang
);
1685 /* redefining a previously known filename extension */
1688 /* query ("Really make files of type %s '%s'?", */
1689 /* ext_args, language_str (lang)); */
1691 free (filename_language_table
[i
].ext
);
1692 filename_language_table
[i
].ext
= strsave (ext_args
);
1693 filename_language_table
[i
].lang
= lang
;
1698 info_ext_lang_command (args
, from_tty
)
1704 printf_filtered ("Filename extensions and the languages they represent:");
1705 printf_filtered ("\n\n");
1706 for (i
= 0; i
< fl_table_next
; i
++)
1707 printf_filtered ("\t%s\t- %s\n",
1708 filename_language_table
[i
].ext
,
1709 language_str (filename_language_table
[i
].lang
));
1713 init_filename_language_table ()
1715 if (fl_table_size
== 0) /* protect against repetition */
1719 filename_language_table
=
1720 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
1721 add_filename_language (".c", language_c
);
1722 add_filename_language (".C", language_cplus
);
1723 add_filename_language (".cc", language_cplus
);
1724 add_filename_language (".cp", language_cplus
);
1725 add_filename_language (".cpp", language_cplus
);
1726 add_filename_language (".cxx", language_cplus
);
1727 add_filename_language (".c++", language_cplus
);
1728 /* start-sanitize-java */
1729 add_filename_language (".java", language_java
);
1730 add_filename_language (".class", language_java
);
1731 /* end-sanitize-java */
1732 add_filename_language (".ch", language_chill
);
1733 add_filename_language (".c186", language_chill
);
1734 add_filename_language (".c286", language_chill
);
1735 add_filename_language (".f", language_fortran
);
1736 add_filename_language (".F", language_fortran
);
1737 add_filename_language (".s", language_asm
);
1738 add_filename_language (".S", language_asm
);
1743 deduce_language_from_filename (filename
)
1749 if (filename
!= NULL
)
1750 if ((cp
= strrchr (filename
, '.')) != NULL
)
1751 for (i
= 0; i
< fl_table_next
; i
++)
1752 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
1753 return filename_language_table
[i
].lang
;
1755 return language_unknown
;
1760 Allocate and partly initialize a new symbol table. Return a pointer
1761 to it. error() if no space.
1763 Caller must set these fields:
1769 possibly free_named_symtabs (symtab->filename);
1773 allocate_symtab (filename
, objfile
)
1775 struct objfile
*objfile
;
1777 register struct symtab
*symtab
;
1779 symtab
= (struct symtab
*)
1780 obstack_alloc (&objfile
-> symbol_obstack
, sizeof (struct symtab
));
1781 memset (symtab
, 0, sizeof (*symtab
));
1782 symtab
-> filename
= obsavestring (filename
, strlen (filename
),
1783 &objfile
-> symbol_obstack
);
1784 symtab
-> fullname
= NULL
;
1785 symtab
-> language
= deduce_language_from_filename (filename
);
1786 symtab
-> debugformat
= obsavestring ("unknown", 7,
1787 &objfile
-> symbol_obstack
);
1789 /* Hook it to the objfile it comes from */
1791 symtab
-> objfile
= objfile
;
1792 symtab
-> next
= objfile
-> symtabs
;
1793 objfile
-> symtabs
= symtab
;
1795 /* FIXME: This should go away. It is only defined for the Z8000,
1796 and the Z8000 definition of this macro doesn't have anything to
1797 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
1798 here for convenience. */
1799 #ifdef INIT_EXTRA_SYMTAB_INFO
1800 INIT_EXTRA_SYMTAB_INFO (symtab
);
1806 struct partial_symtab
*
1807 allocate_psymtab (filename
, objfile
)
1809 struct objfile
*objfile
;
1811 struct partial_symtab
*psymtab
;
1813 if (objfile
-> free_psymtabs
)
1815 psymtab
= objfile
-> free_psymtabs
;
1816 objfile
-> free_psymtabs
= psymtab
-> next
;
1819 psymtab
= (struct partial_symtab
*)
1820 obstack_alloc (&objfile
-> psymbol_obstack
,
1821 sizeof (struct partial_symtab
));
1823 memset (psymtab
, 0, sizeof (struct partial_symtab
));
1824 psymtab
-> filename
= obsavestring (filename
, strlen (filename
),
1825 &objfile
-> psymbol_obstack
);
1826 psymtab
-> symtab
= NULL
;
1828 /* Prepend it to the psymtab list for the objfile it belongs to.
1829 Psymtabs are searched in most recent inserted -> least recent
1832 psymtab
-> objfile
= objfile
;
1833 psymtab
-> next
= objfile
-> psymtabs
;
1834 objfile
-> psymtabs
= psymtab
;
1837 struct partial_symtab
**prev_pst
;
1838 psymtab
-> objfile
= objfile
;
1839 psymtab
-> next
= NULL
;
1840 prev_pst
= &(objfile
-> psymtabs
);
1841 while ((*prev_pst
) != NULL
)
1842 prev_pst
= &((*prev_pst
) -> next
);
1843 (*prev_pst
) = psymtab
;
1851 discard_psymtab (pst
)
1852 struct partial_symtab
*pst
;
1854 struct partial_symtab
**prev_pst
;
1857 Empty psymtabs happen as a result of header files which don't
1858 have any symbols in them. There can be a lot of them. But this
1859 check is wrong, in that a psymtab with N_SLINE entries but
1860 nothing else is not empty, but we don't realize that. Fixing
1861 that without slowing things down might be tricky. */
1863 /* First, snip it out of the psymtab chain */
1865 prev_pst
= &(pst
->objfile
->psymtabs
);
1866 while ((*prev_pst
) != pst
)
1867 prev_pst
= &((*prev_pst
)->next
);
1868 (*prev_pst
) = pst
->next
;
1870 /* Next, put it on a free list for recycling */
1872 pst
->next
= pst
->objfile
->free_psymtabs
;
1873 pst
->objfile
->free_psymtabs
= pst
;
1877 /* Reset all data structures in gdb which may contain references to symbol
1881 clear_symtab_users ()
1883 /* Someday, we should do better than this, by only blowing away
1884 the things that really need to be blown. */
1885 clear_value_history ();
1887 clear_internalvars ();
1888 breakpoint_re_set ();
1889 set_default_breakpoint (0, 0, 0, 0);
1890 current_source_symtab
= 0;
1891 current_source_line
= 0;
1892 clear_pc_function_cache ();
1893 target_new_objfile (NULL
);
1896 /* clear_symtab_users_once:
1898 This function is run after symbol reading, or from a cleanup.
1899 If an old symbol table was obsoleted, the old symbol table
1900 has been blown away, but the other GDB data structures that may
1901 reference it have not yet been cleared or re-directed. (The old
1902 symtab was zapped, and the cleanup queued, in free_named_symtab()
1905 This function can be queued N times as a cleanup, or called
1906 directly; it will do all the work the first time, and then will be a
1907 no-op until the next time it is queued. This works by bumping a
1908 counter at queueing time. Much later when the cleanup is run, or at
1909 the end of symbol processing (in case the cleanup is discarded), if
1910 the queued count is greater than the "done-count", we do the work
1911 and set the done-count to the queued count. If the queued count is
1912 less than or equal to the done-count, we just ignore the call. This
1913 is needed because reading a single .o file will often replace many
1914 symtabs (one per .h file, for example), and we don't want to reset
1915 the breakpoints N times in the user's face.
1917 The reason we both queue a cleanup, and call it directly after symbol
1918 reading, is because the cleanup protects us in case of errors, but is
1919 discarded if symbol reading is successful. */
1922 /* FIXME: As free_named_symtabs is currently a big noop this function
1923 is no longer needed. */
1925 clear_symtab_users_once
PARAMS ((void));
1927 static int clear_symtab_users_queued
;
1928 static int clear_symtab_users_done
;
1931 clear_symtab_users_once ()
1933 /* Enforce once-per-`do_cleanups'-semantics */
1934 if (clear_symtab_users_queued
<= clear_symtab_users_done
)
1936 clear_symtab_users_done
= clear_symtab_users_queued
;
1938 clear_symtab_users ();
1942 /* Delete the specified psymtab, and any others that reference it. */
1945 cashier_psymtab (pst
)
1946 struct partial_symtab
*pst
;
1948 struct partial_symtab
*ps
, *pprev
= NULL
;
1951 /* Find its previous psymtab in the chain */
1952 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
) {
1959 /* Unhook it from the chain. */
1960 if (ps
== pst
->objfile
->psymtabs
)
1961 pst
->objfile
->psymtabs
= ps
->next
;
1963 pprev
->next
= ps
->next
;
1965 /* FIXME, we can't conveniently deallocate the entries in the
1966 partial_symbol lists (global_psymbols/static_psymbols) that
1967 this psymtab points to. These just take up space until all
1968 the psymtabs are reclaimed. Ditto the dependencies list and
1969 filename, which are all in the psymbol_obstack. */
1971 /* We need to cashier any psymtab that has this one as a dependency... */
1973 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
) {
1974 for (i
= 0; i
< ps
->number_of_dependencies
; i
++) {
1975 if (ps
->dependencies
[i
] == pst
) {
1976 cashier_psymtab (ps
);
1977 goto again
; /* Must restart, chain has been munged. */
1984 /* If a symtab or psymtab for filename NAME is found, free it along
1985 with any dependent breakpoints, displays, etc.
1986 Used when loading new versions of object modules with the "add-file"
1987 command. This is only called on the top-level symtab or psymtab's name;
1988 it is not called for subsidiary files such as .h files.
1990 Return value is 1 if we blew away the environment, 0 if not.
1991 FIXME. The return valu appears to never be used.
1993 FIXME. I think this is not the best way to do this. We should
1994 work on being gentler to the environment while still cleaning up
1995 all stray pointers into the freed symtab. */
1998 free_named_symtabs (name
)
2002 /* FIXME: With the new method of each objfile having it's own
2003 psymtab list, this function needs serious rethinking. In particular,
2004 why was it ever necessary to toss psymtabs with specific compilation
2005 unit filenames, as opposed to all psymtabs from a particular symbol
2007 Well, the answer is that some systems permit reloading of particular
2008 compilation units. We want to blow away any old info about these
2009 compilation units, regardless of which objfiles they arrived in. --gnu. */
2011 register struct symtab
*s
;
2012 register struct symtab
*prev
;
2013 register struct partial_symtab
*ps
;
2014 struct blockvector
*bv
;
2017 /* We only wack things if the symbol-reload switch is set. */
2018 if (!symbol_reloading
)
2021 /* Some symbol formats have trouble providing file names... */
2022 if (name
== 0 || *name
== '\0')
2025 /* Look for a psymtab with the specified name. */
2028 for (ps
= partial_symtab_list
; ps
; ps
= ps
->next
) {
2029 if (STREQ (name
, ps
->filename
)) {
2030 cashier_psymtab (ps
); /* Blow it away...and its little dog, too. */
2031 goto again2
; /* Must restart, chain has been munged */
2035 /* Look for a symtab with the specified name. */
2037 for (s
= symtab_list
; s
; s
= s
->next
)
2039 if (STREQ (name
, s
->filename
))
2046 if (s
== symtab_list
)
2047 symtab_list
= s
->next
;
2049 prev
->next
= s
->next
;
2051 /* For now, queue a delete for all breakpoints, displays, etc., whether
2052 or not they depend on the symtab being freed. This should be
2053 changed so that only those data structures affected are deleted. */
2055 /* But don't delete anything if the symtab is empty.
2056 This test is necessary due to a bug in "dbxread.c" that
2057 causes empty symtabs to be created for N_SO symbols that
2058 contain the pathname of the object file. (This problem
2059 has been fixed in GDB 3.9x). */
2061 bv
= BLOCKVECTOR (s
);
2062 if (BLOCKVECTOR_NBLOCKS (bv
) > 2
2063 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
))
2064 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)))
2066 complain (&oldsyms_complaint
, name
);
2068 clear_symtab_users_queued
++;
2069 make_cleanup (clear_symtab_users_once
, 0);
2072 complain (&empty_symtab_complaint
, name
);
2079 /* It is still possible that some breakpoints will be affected
2080 even though no symtab was found, since the file might have
2081 been compiled without debugging, and hence not be associated
2082 with a symtab. In order to handle this correctly, we would need
2083 to keep a list of text address ranges for undebuggable files.
2084 For now, we do nothing, since this is a fairly obscure case. */
2088 /* FIXME, what about the minimal symbol table? */
2095 /* Allocate and partially fill a partial symtab. It will be
2096 completely filled at the end of the symbol list.
2098 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2099 is the address relative to which its symbols are (incremental) or 0
2103 struct partial_symtab
*
2104 start_psymtab_common (objfile
, section_offsets
,
2105 filename
, textlow
, global_syms
, static_syms
)
2106 struct objfile
*objfile
;
2107 struct section_offsets
*section_offsets
;
2110 struct partial_symbol
**global_syms
;
2111 struct partial_symbol
**static_syms
;
2113 struct partial_symtab
*psymtab
;
2115 psymtab
= allocate_psymtab (filename
, objfile
);
2116 psymtab
-> section_offsets
= section_offsets
;
2117 psymtab
-> textlow
= textlow
;
2118 psymtab
-> texthigh
= psymtab
-> textlow
; /* default */
2119 psymtab
-> globals_offset
= global_syms
- objfile
-> global_psymbols
.list
;
2120 psymtab
-> statics_offset
= static_syms
- objfile
-> static_psymbols
.list
;
2124 /* Add a symbol with a long value to a psymtab.
2125 Since one arg is a struct, we pass in a ptr and deref it (sigh). */
2128 add_psymbol_to_list (name
, namelength
, namespace, class, list
, val
, coreaddr
,
2132 namespace_enum
namespace;
2133 enum address_class
class;
2134 struct psymbol_allocation_list
*list
;
2135 long val
; /* Value as a long */
2136 CORE_ADDR coreaddr
; /* Value as a CORE_ADDR */
2137 enum language language
;
2138 struct objfile
*objfile
;
2140 register struct partial_symbol
*psym
;
2141 char *buf
= alloca (namelength
+ 1);
2142 /* psymbol is static so that there will be no uninitialized gaps in the
2143 structure which might contain random data, causing cache misses in
2145 static struct partial_symbol psymbol
;
2147 /* Create local copy of the partial symbol */
2148 memcpy (buf
, name
, namelength
);
2149 buf
[namelength
] = '\0';
2150 SYMBOL_NAME (&psymbol
) = bcache (buf
, namelength
+ 1, &objfile
->psymbol_cache
);
2151 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2154 SYMBOL_VALUE (&psymbol
) = val
;
2158 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2160 SYMBOL_SECTION (&psymbol
) = 0;
2161 SYMBOL_LANGUAGE (&psymbol
) = language
;
2162 PSYMBOL_NAMESPACE (&psymbol
) = namespace;
2163 PSYMBOL_CLASS (&psymbol
) = class;
2164 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2166 /* Stash the partial symbol away in the cache */
2167 psym
= bcache (&psymbol
, sizeof (struct partial_symbol
), &objfile
->psymbol_cache
);
2169 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2170 if (list
->next
>= list
->list
+ list
->size
)
2172 extend_psymbol_list (list
, objfile
);
2174 *list
->next
++ = psym
;
2175 OBJSTAT (objfile
, n_psyms
++);
2178 /* Add a symbol with a long value to a psymtab. This differs from
2179 * add_psymbol_to_list above in taking both a mangled and a demangled
2183 add_psymbol_with_dem_name_to_list (name
, namelength
, dem_name
, dem_namelength
,
2184 namespace, class, list
, val
, coreaddr
, language
, objfile
)
2189 namespace_enum
namespace;
2190 enum address_class
class;
2191 struct psymbol_allocation_list
*list
;
2192 long val
; /* Value as a long */
2193 CORE_ADDR coreaddr
; /* Value as a CORE_ADDR */
2194 enum language language
;
2195 struct objfile
*objfile
;
2197 register struct partial_symbol
*psym
;
2198 char *buf
= alloca (namelength
+ 1);
2199 /* psymbol is static so that there will be no uninitialized gaps in the
2200 structure which might contain random data, causing cache misses in
2202 static struct partial_symbol psymbol
;
2204 /* Create local copy of the partial symbol */
2206 memcpy (buf
, name
, namelength
);
2207 buf
[namelength
] = '\0';
2208 SYMBOL_NAME (&psymbol
) = bcache (buf
, namelength
+ 1, &objfile
->psymbol_cache
);
2210 buf
= alloca (dem_namelength
+ 1);
2211 memcpy (buf
, dem_name
, dem_namelength
);
2212 buf
[dem_namelength
] = '\0';
2217 case language_cplus
:
2218 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol
) =
2219 bcache (buf
, dem_namelength
+ 1, &objfile
->psymbol_cache
);
2221 case language_chill
:
2222 SYMBOL_CHILL_DEMANGLED_NAME (&psymbol
) =
2223 bcache (buf
, dem_namelength
+ 1, &objfile
->psymbol_cache
);
2225 /* FIXME What should be done for the default case? Ignoring for now. */
2228 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2231 SYMBOL_VALUE (&psymbol
) = val
;
2235 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2237 SYMBOL_SECTION (&psymbol
) = 0;
2238 SYMBOL_LANGUAGE (&psymbol
) = language
;
2239 PSYMBOL_NAMESPACE (&psymbol
) = namespace;
2240 PSYMBOL_CLASS (&psymbol
) = class;
2241 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2243 /* Stash the partial symbol away in the cache */
2244 psym
= bcache (&psymbol
, sizeof (struct partial_symbol
), &objfile
->psymbol_cache
);
2246 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2247 if (list
->next
>= list
->list
+ list
->size
)
2249 extend_psymbol_list (list
, objfile
);
2251 *list
->next
++ = psym
;
2252 OBJSTAT (objfile
, n_psyms
++);
2255 /* Initialize storage for partial symbols. */
2258 init_psymbol_list (objfile
, total_symbols
)
2259 struct objfile
*objfile
;
2262 /* Free any previously allocated psymbol lists. */
2264 if (objfile
-> global_psymbols
.list
)
2266 mfree (objfile
-> md
, (PTR
)objfile
-> global_psymbols
.list
);
2268 if (objfile
-> static_psymbols
.list
)
2270 mfree (objfile
-> md
, (PTR
)objfile
-> static_psymbols
.list
);
2273 /* Current best guess is that approximately a twentieth
2274 of the total symbols (in a debugging file) are global or static
2277 objfile
-> global_psymbols
.size
= total_symbols
/ 10;
2278 objfile
-> static_psymbols
.size
= total_symbols
/ 10;
2280 if (objfile
-> global_psymbols
.size
> 0)
2282 objfile
-> global_psymbols
.next
=
2283 objfile
-> global_psymbols
.list
= (struct partial_symbol
**)
2284 xmmalloc (objfile
-> md
, (objfile
-> global_psymbols
.size
2285 * sizeof (struct partial_symbol
*)));
2287 if (objfile
-> static_psymbols
.size
> 0)
2289 objfile
-> static_psymbols
.next
=
2290 objfile
-> static_psymbols
.list
= (struct partial_symbol
**)
2291 xmmalloc (objfile
-> md
, (objfile
-> static_psymbols
.size
2292 * sizeof (struct partial_symbol
*)));
2297 The following code implements an abstraction for debugging overlay sections.
2299 The target model is as follows:
2300 1) The gnu linker will permit multiple sections to be mapped into the
2301 same VMA, each with its own unique LMA (or load address).
2302 2) It is assumed that some runtime mechanism exists for mapping the
2303 sections, one by one, from the load address into the VMA address.
2304 3) This code provides a mechanism for gdb to keep track of which
2305 sections should be considered to be mapped from the VMA to the LMA.
2306 This information is used for symbol lookup, and memory read/write.
2307 For instance, if a section has been mapped then its contents
2308 should be read from the VMA, otherwise from the LMA.
2310 Two levels of debugger support for overlays are available. One is
2311 "manual", in which the debugger relies on the user to tell it which
2312 overlays are currently mapped. This level of support is
2313 implemented entirely in the core debugger, and the information about
2314 whether a section is mapped is kept in the objfile->obj_section table.
2316 The second level of support is "automatic", and is only available if
2317 the target-specific code provides functionality to read the target's
2318 overlay mapping table, and translate its contents for the debugger
2319 (by updating the mapped state information in the obj_section tables).
2321 The interface is as follows:
2323 overlay map <name> -- tell gdb to consider this section mapped
2324 overlay unmap <name> -- tell gdb to consider this section unmapped
2325 overlay list -- list the sections that GDB thinks are mapped
2326 overlay read-target -- get the target's state of what's mapped
2327 overlay off/manual/auto -- set overlay debugging state
2328 Functional interface:
2329 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2330 section, return that section.
2331 find_pc_overlay(pc): find any overlay section that contains
2332 the pc, either in its VMA or its LMA
2333 overlay_is_mapped(sect): true if overlay is marked as mapped
2334 section_is_overlay(sect): true if section's VMA != LMA
2335 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2336 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2337 overlay_mapped_address(...): map an address from section's LMA to VMA
2338 overlay_unmapped_address(...): map an address from section's VMA to LMA
2339 symbol_overlayed_address(...): Return a "current" address for symbol:
2340 either in VMA or LMA depending on whether
2341 the symbol's section is currently mapped
2344 /* Overlay debugging state: */
2346 int overlay_debugging
= 0; /* 0 == off, 1 == manual, -1 == auto */
2347 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
2349 /* Target vector for refreshing overlay mapped state */
2350 static void simple_overlay_update
PARAMS ((struct obj_section
*));
2351 void (*target_overlay_update
) PARAMS ((struct obj_section
*))
2352 = simple_overlay_update
;
2354 /* Function: section_is_overlay (SECTION)
2355 Returns true if SECTION has VMA not equal to LMA, ie.
2356 SECTION is loaded at an address different from where it will "run". */
2359 section_is_overlay (section
)
2362 if (overlay_debugging
)
2363 if (section
&& section
->lma
!= 0 &&
2364 section
->vma
!= section
->lma
)
2370 /* Function: overlay_invalidate_all (void)
2371 Invalidate the mapped state of all overlay sections (mark it as stale). */
2374 overlay_invalidate_all ()
2376 struct objfile
*objfile
;
2377 struct obj_section
*sect
;
2379 ALL_OBJSECTIONS (objfile
, sect
)
2380 if (section_is_overlay (sect
->the_bfd_section
))
2381 sect
->ovly_mapped
= -1;
2384 /* Function: overlay_is_mapped (SECTION)
2385 Returns true if section is an overlay, and is currently mapped.
2386 Private: public access is thru function section_is_mapped.
2388 Access to the ovly_mapped flag is restricted to this function, so
2389 that we can do automatic update. If the global flag
2390 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2391 overlay_invalidate_all. If the mapped state of the particular
2392 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2395 overlay_is_mapped (osect
)
2396 struct obj_section
*osect
;
2398 if (osect
== 0 || !section_is_overlay (osect
->the_bfd_section
))
2401 switch (overlay_debugging
)
2404 case 0: return 0; /* overlay debugging off */
2405 case -1: /* overlay debugging automatic */
2406 /* Unles there is a target_overlay_update function,
2407 there's really nothing useful to do here (can't really go auto) */
2408 if (target_overlay_update
)
2410 if (overlay_cache_invalid
)
2412 overlay_invalidate_all ();
2413 overlay_cache_invalid
= 0;
2415 if (osect
->ovly_mapped
== -1)
2416 (*target_overlay_update
) (osect
);
2418 /* fall thru to manual case */
2419 case 1: /* overlay debugging manual */
2420 return osect
->ovly_mapped
== 1;
2424 /* Function: section_is_mapped
2425 Returns true if section is an overlay, and is currently mapped. */
2428 section_is_mapped (section
)
2431 struct objfile
*objfile
;
2432 struct obj_section
*osect
;
2434 if (overlay_debugging
)
2435 if (section
&& section_is_overlay (section
))
2436 ALL_OBJSECTIONS (objfile
, osect
)
2437 if (osect
->the_bfd_section
== section
)
2438 return overlay_is_mapped (osect
);
2443 /* Function: pc_in_unmapped_range
2444 If PC falls into the lma range of SECTION, return true, else false. */
2447 pc_in_unmapped_range (pc
, section
)
2453 if (overlay_debugging
)
2454 if (section
&& section_is_overlay (section
))
2456 size
= bfd_get_section_size_before_reloc (section
);
2457 if (section
->lma
<= pc
&& pc
< section
->lma
+ size
)
2463 /* Function: pc_in_mapped_range
2464 If PC falls into the vma range of SECTION, return true, else false. */
2467 pc_in_mapped_range (pc
, section
)
2473 if (overlay_debugging
)
2474 if (section
&& section_is_overlay (section
))
2476 size
= bfd_get_section_size_before_reloc (section
);
2477 if (section
->vma
<= pc
&& pc
< section
->vma
+ size
)
2483 /* Function: overlay_unmapped_address (PC, SECTION)
2484 Returns the address corresponding to PC in the unmapped (load) range.
2485 May be the same as PC. */
2488 overlay_unmapped_address (pc
, section
)
2492 if (overlay_debugging
)
2493 if (section
&& section_is_overlay (section
) &&
2494 pc_in_mapped_range (pc
, section
))
2495 return pc
+ section
->lma
- section
->vma
;
2500 /* Function: overlay_mapped_address (PC, SECTION)
2501 Returns the address corresponding to PC in the mapped (runtime) range.
2502 May be the same as PC. */
2505 overlay_mapped_address (pc
, section
)
2509 if (overlay_debugging
)
2510 if (section
&& section_is_overlay (section
) &&
2511 pc_in_unmapped_range (pc
, section
))
2512 return pc
+ section
->vma
- section
->lma
;
2518 /* Function: symbol_overlayed_address
2519 Return one of two addresses (relative to the VMA or to the LMA),
2520 depending on whether the section is mapped or not. */
2523 symbol_overlayed_address (address
, section
)
2527 if (overlay_debugging
)
2529 /* If the symbol has no section, just return its regular address. */
2532 /* If the symbol's section is not an overlay, just return its address */
2533 if (!section_is_overlay (section
))
2535 /* If the symbol's section is mapped, just return its address */
2536 if (section_is_mapped (section
))
2539 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
2540 * then return its LOADED address rather than its vma address!!
2542 return overlay_unmapped_address (address
, section
);
2547 /* Function: find_pc_overlay (PC)
2548 Return the best-match overlay section for PC:
2549 If PC matches a mapped overlay section's VMA, return that section.
2550 Else if PC matches an unmapped section's VMA, return that section.
2551 Else if PC matches an unmapped section's LMA, return that section. */
2554 find_pc_overlay (pc
)
2557 struct objfile
*objfile
;
2558 struct obj_section
*osect
, *best_match
= NULL
;
2560 if (overlay_debugging
)
2561 ALL_OBJSECTIONS (objfile
, osect
)
2562 if (section_is_overlay (osect
->the_bfd_section
))
2564 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
))
2566 if (overlay_is_mapped (osect
))
2567 return osect
->the_bfd_section
;
2571 else if (pc_in_unmapped_range (pc
, osect
->the_bfd_section
))
2574 return best_match
? best_match
->the_bfd_section
: NULL
;
2577 /* Function: find_pc_mapped_section (PC)
2578 If PC falls into the VMA address range of an overlay section that is
2579 currently marked as MAPPED, return that section. Else return NULL. */
2582 find_pc_mapped_section (pc
)
2585 struct objfile
*objfile
;
2586 struct obj_section
*osect
;
2588 if (overlay_debugging
)
2589 ALL_OBJSECTIONS (objfile
, osect
)
2590 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
) &&
2591 overlay_is_mapped (osect
))
2592 return osect
->the_bfd_section
;
2597 /* Function: list_overlays_command
2598 Print a list of mapped sections and their PC ranges */
2601 list_overlays_command (args
, from_tty
)
2606 struct objfile
*objfile
;
2607 struct obj_section
*osect
;
2609 if (overlay_debugging
)
2610 ALL_OBJSECTIONS (objfile
, osect
)
2611 if (overlay_is_mapped (osect
))
2617 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
2618 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
2619 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
2620 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
2622 printf_filtered ("Section %s, loaded at ", name
);
2623 print_address_numeric (lma
, 1, stdout
);
2624 puts_filtered (" - ");
2625 print_address_numeric (lma
+ size
, 1, stdout
);
2626 printf_filtered (", mapped at ");
2627 print_address_numeric (vma
, 1, stdout
);
2628 puts_filtered (" - ");
2629 print_address_numeric (vma
+ size
, 1, stdout
);
2630 puts_filtered ("\n");
2635 printf_filtered ("No sections are mapped.\n");
2638 /* Function: map_overlay_command
2639 Mark the named section as mapped (ie. residing at its VMA address). */
2642 map_overlay_command (args
, from_tty
)
2646 struct objfile
*objfile
, *objfile2
;
2647 struct obj_section
*sec
, *sec2
;
2650 if (!overlay_debugging
)
2651 error ("Overlay debugging not enabled. Use the 'OVERLAY ON' command.");
2653 if (args
== 0 || *args
== 0)
2654 error ("Argument required: name of an overlay section");
2656 /* First, find a section matching the user supplied argument */
2657 ALL_OBJSECTIONS (objfile
, sec
)
2658 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
2660 /* Now, check to see if the section is an overlay. */
2661 bfdsec
= sec
->the_bfd_section
;
2662 if (!section_is_overlay (bfdsec
))
2663 continue; /* not an overlay section */
2665 /* Mark the overlay as "mapped" */
2666 sec
->ovly_mapped
= 1;
2668 /* Next, make a pass and unmap any sections that are
2669 overlapped by this new section: */
2670 ALL_OBJSECTIONS (objfile2
, sec2
)
2671 if (sec2
->ovly_mapped
&&
2673 sec
->the_bfd_section
!= sec2
->the_bfd_section
&&
2674 (pc_in_mapped_range (sec2
->addr
, sec
->the_bfd_section
) ||
2675 pc_in_mapped_range (sec2
->endaddr
, sec
->the_bfd_section
)))
2678 printf_filtered ("Note: section %s unmapped by overlap\n",
2679 bfd_section_name (objfile
->obfd
,
2680 sec2
->the_bfd_section
));
2681 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
2685 error ("No overlay section called %s", args
);
2688 /* Function: unmap_overlay_command
2689 Mark the overlay section as unmapped
2690 (ie. resident in its LMA address range, rather than the VMA range). */
2693 unmap_overlay_command (args
, from_tty
)
2697 struct objfile
*objfile
;
2698 struct obj_section
*sec
;
2700 if (!overlay_debugging
)
2701 error ("Overlay debugging not enabled. Use the 'OVERLAY ON' command.");
2703 if (args
== 0 || *args
== 0)
2704 error ("Argument required: name of an overlay section");
2706 /* First, find a section matching the user supplied argument */
2707 ALL_OBJSECTIONS (objfile
, sec
)
2708 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
2710 if (!sec
->ovly_mapped
)
2711 error ("Section %s is not mapped", args
);
2712 sec
->ovly_mapped
= 0;
2715 error ("No overlay section called %s", args
);
2718 /* Function: overlay_auto_command
2719 A utility command to turn on overlay debugging.
2720 Possibly this should be done via a set/show command. */
2723 overlay_auto_command (args
, from_tty
)
2727 overlay_debugging
= -1;
2729 printf_filtered ("Automatic overlay debugging enabled.");
2732 /* Function: overlay_manual_command
2733 A utility command to turn on overlay debugging.
2734 Possibly this should be done via a set/show command. */
2737 overlay_manual_command (args
, from_tty
)
2741 overlay_debugging
= 1;
2743 printf_filtered ("Overlay debugging enabled.");
2746 /* Function: overlay_off_command
2747 A utility command to turn on overlay debugging.
2748 Possibly this should be done via a set/show command. */
2751 overlay_off_command (args
, from_tty
)
2755 overlay_debugging
= 0;
2757 printf_filtered ("Overlay debugging disabled.");
2761 overlay_load_command (args
, from_tty
)
2765 if (target_overlay_update
)
2766 (*target_overlay_update
) (NULL
);
2768 error ("This target does not know how to read its overlay state.");
2771 /* Function: overlay_command
2772 A place-holder for a mis-typed command */
2774 /* Command list chain containing all defined "overlay" subcommands. */
2775 struct cmd_list_element
*overlaylist
;
2778 overlay_command (args
, from_tty
)
2783 ("\"overlay\" must be followed by the name of an overlay command.\n");
2784 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
2788 /* Target Overlays for the "Simplest" overlay manager:
2790 This is GDB's default target overlay layer. It works with the
2791 minimal overlay manager supplied as an example by Cygnus. The
2792 entry point is via a function pointer "target_overlay_update",
2793 so targets that use a different runtime overlay manager can
2794 substitute their own overlay_update function and take over the
2797 The overlay_update function pokes around in the target's data structures
2798 to see what overlays are mapped, and updates GDB's overlay mapping with
2801 In this simple implementation, the target data structures are as follows:
2802 unsigned _novlys; /# number of overlay sections #/
2803 unsigned _ovly_table[_novlys][4] = {
2804 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
2805 {..., ..., ..., ...},
2807 unsigned _novly_regions; /# number of overlay regions #/
2808 unsigned _ovly_region_table[_novly_regions][3] = {
2809 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
2812 These functions will attempt to update GDB's mappedness state in the
2813 symbol section table, based on the target's mappedness state.
2815 To do this, we keep a cached copy of the target's _ovly_table, and
2816 attempt to detect when the cached copy is invalidated. The main
2817 entry point is "simple_overlay_update(SECT), which looks up SECT in
2818 the cached table and re-reads only the entry for that section from
2819 the target (whenever possible).
2822 /* Cached, dynamically allocated copies of the target data structures: */
2823 static unsigned (*cache_ovly_table
)[4] = 0;
2825 static unsigned (*cache_ovly_region_table
)[3] = 0;
2827 static unsigned cache_novlys
= 0;
2829 static unsigned cache_novly_regions
= 0;
2831 static CORE_ADDR cache_ovly_table_base
= 0;
2833 static CORE_ADDR cache_ovly_region_table_base
= 0;
2835 enum ovly_index
{ VMA
, SIZE
, LMA
, MAPPED
};
2836 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
2838 /* Throw away the cached copy of _ovly_table */
2840 simple_free_overlay_table ()
2842 if (cache_ovly_table
)
2843 free(cache_ovly_table
);
2845 cache_ovly_table
= NULL
;
2846 cache_ovly_table_base
= 0;
2850 /* Throw away the cached copy of _ovly_region_table */
2852 simple_free_overlay_region_table ()
2854 if (cache_ovly_region_table
)
2855 free(cache_ovly_region_table
);
2856 cache_novly_regions
= 0;
2857 cache_ovly_region_table
= NULL
;
2858 cache_ovly_region_table_base
= 0;
2862 /* Read an array of ints from the target into a local buffer.
2863 Convert to host order. int LEN is number of ints */
2865 read_target_long_array (memaddr
, myaddr
, len
)
2867 unsigned int *myaddr
;
2870 char *buf
= alloca (len
* TARGET_LONG_BYTES
);
2873 read_memory (memaddr
, buf
, len
* TARGET_LONG_BYTES
);
2874 for (i
= 0; i
< len
; i
++)
2875 myaddr
[i
] = extract_unsigned_integer (TARGET_LONG_BYTES
* i
+ buf
,
2879 /* Find and grab a copy of the target _ovly_table
2880 (and _novlys, which is needed for the table's size) */
2882 simple_read_overlay_table ()
2884 struct minimal_symbol
*msym
;
2886 simple_free_overlay_table ();
2887 msym
= lookup_minimal_symbol ("_novlys", 0, 0);
2889 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
2891 return 0; /* failure */
2892 cache_ovly_table
= (void *) xmalloc (cache_novlys
* sizeof(*cache_ovly_table
));
2893 if (cache_ovly_table
!= NULL
)
2895 msym
= lookup_minimal_symbol ("_ovly_table", 0, 0);
2898 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
2899 read_target_long_array (cache_ovly_table_base
,
2900 (int *) cache_ovly_table
,
2904 return 0; /* failure */
2907 return 0; /* failure */
2908 return 1; /* SUCCESS */
2912 /* Find and grab a copy of the target _ovly_region_table
2913 (and _novly_regions, which is needed for the table's size) */
2915 simple_read_overlay_region_table ()
2917 struct minimal_symbol
*msym
;
2919 simple_free_overlay_region_table ();
2920 msym
= lookup_minimal_symbol ("_novly_regions", 0, 0);
2922 cache_novly_regions
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
2924 return 0; /* failure */
2925 cache_ovly_region_table
= (void *) xmalloc (cache_novly_regions
* 12);
2926 if (cache_ovly_region_table
!= NULL
)
2928 msym
= lookup_minimal_symbol ("_ovly_region_table", 0, 0);
2931 cache_ovly_region_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
2932 read_target_long_array (cache_ovly_region_table_base
,
2933 (int *) cache_ovly_region_table
,
2934 cache_novly_regions
* 3);
2937 return 0; /* failure */
2940 return 0; /* failure */
2941 return 1; /* SUCCESS */
2945 /* Function: simple_overlay_update_1
2946 A helper function for simple_overlay_update. Assuming a cached copy
2947 of _ovly_table exists, look through it to find an entry whose vma,
2948 lma and size match those of OSECT. Re-read the entry and make sure
2949 it still matches OSECT (else the table may no longer be valid).
2950 Set OSECT's mapped state to match the entry. Return: 1 for
2951 success, 0 for failure. */
2954 simple_overlay_update_1 (osect
)
2955 struct obj_section
*osect
;
2959 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
2960 for (i
= 0; i
< cache_novlys
; i
++)
2961 if (cache_ovly_table
[i
][VMA
] == osect
->the_bfd_section
->vma
&&
2962 cache_ovly_table
[i
][LMA
] == osect
->the_bfd_section
->lma
/* &&
2963 cache_ovly_table[i][SIZE] == size */)
2965 read_target_long_array (cache_ovly_table_base
+ i
* TARGET_LONG_BYTES
,
2966 (int *) cache_ovly_table
[i
], 4);
2967 if (cache_ovly_table
[i
][VMA
] == osect
->the_bfd_section
->vma
&&
2968 cache_ovly_table
[i
][LMA
] == osect
->the_bfd_section
->lma
/* &&
2969 cache_ovly_table[i][SIZE] == size */)
2971 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
2974 else /* Warning! Warning! Target's ovly table has changed! */
2980 /* Function: simple_overlay_update
2981 If OSECT is NULL, then update all sections' mapped state
2982 (after re-reading the entire target _ovly_table).
2983 If OSECT is non-NULL, then try to find a matching entry in the
2984 cached ovly_table and update only OSECT's mapped state.
2985 If a cached entry can't be found or the cache isn't valid, then
2986 re-read the entire cache, and go ahead and update all sections. */
2989 simple_overlay_update (osect
)
2990 struct obj_section
*osect
;
2992 struct objfile
*objfile
;
2994 /* Were we given an osect to look up? NULL means do all of them. */
2996 /* Have we got a cached copy of the target's overlay table? */
2997 if (cache_ovly_table
!= NULL
)
2998 /* Does its cached location match what's currently in the symtab? */
2999 if (cache_ovly_table_base
==
3000 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", 0, 0)))
3001 /* Then go ahead and try to look up this single section in the cache */
3002 if (simple_overlay_update_1 (osect
))
3003 /* Found it! We're done. */
3006 /* Cached table no good: need to read the entire table anew.
3007 Or else we want all the sections, in which case it's actually
3008 more efficient to read the whole table in one block anyway. */
3010 if (simple_read_overlay_table () == 0) /* read failed? No table? */
3012 warning ("Failed to read the target overlay mapping table.");
3015 /* Now may as well update all sections, even if only one was requested. */
3016 ALL_OBJSECTIONS (objfile
, osect
)
3017 if (section_is_overlay (osect
->the_bfd_section
))
3021 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3022 for (i
= 0; i
< cache_novlys
; i
++)
3023 if (cache_ovly_table
[i
][VMA
] == osect
->the_bfd_section
->vma
&&
3024 cache_ovly_table
[i
][LMA
] == osect
->the_bfd_section
->lma
/* &&
3025 cache_ovly_table[i][SIZE] == size */)
3026 { /* obj_section matches i'th entry in ovly_table */
3027 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3028 break; /* finished with inner for loop: break out */
3035 _initialize_symfile ()
3037 struct cmd_list_element
*c
;
3039 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
,
3040 "Load symbol table from executable file FILE.\n\
3041 The `file' command can also load symbol tables, as well as setting the file\n\
3042 to execute.", &cmdlist
);
3043 c
->completer
= filename_completer
;
3045 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
,
3046 "Usage: add-symbol-file FILE ADDR\n\
3047 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3048 ADDR is the starting address of the file's text.",
3050 c
->completer
= filename_completer
;
3052 c
= add_cmd ("add-shared-symbol-files", class_files
,
3053 add_shared_symbol_files_command
,
3054 "Load the symbols from shared objects in the dynamic linker's link map.",
3056 c
= add_alias_cmd ("assf", "add-shared-symbol-files", class_files
, 1,
3059 c
= add_cmd ("load", class_files
, load_command
,
3060 "Dynamically load FILE into the running program, and record its symbols\n\
3061 for access from GDB.", &cmdlist
);
3062 c
->completer
= filename_completer
;
3065 (add_set_cmd ("symbol-reloading", class_support
, var_boolean
,
3066 (char *)&symbol_reloading
,
3067 "Set dynamic symbol table reloading multiple times in one run.",
3071 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3072 "Commands for debugging overlays.", &overlaylist
,
3073 "overlay ", 0, &cmdlist
);
3075 add_com_alias ("ovly", "overlay", class_alias
, 1);
3076 add_com_alias ("ov", "overlay", class_alias
, 1);
3078 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3079 "Assert that an overlay section is mapped.", &overlaylist
);
3081 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3082 "Assert that an overlay section is unmapped.", &overlaylist
);
3084 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3085 "List mappings of overlay sections.", &overlaylist
);
3087 add_cmd ("manual", class_support
, overlay_manual_command
,
3088 "Enable overlay debugging.", &overlaylist
);
3089 add_cmd ("off", class_support
, overlay_off_command
,
3090 "Disable overlay debugging.", &overlaylist
);
3091 add_cmd ("auto", class_support
, overlay_auto_command
,
3092 "Enable automatic overlay debugging.", &overlaylist
);
3093 add_cmd ("load-target", class_support
, overlay_load_command
,
3094 "Read the overlay mapping state from the target.", &overlaylist
);
3096 /* Filename extension to source language lookup table: */
3097 init_filename_language_table ();
3098 c
= add_set_cmd ("extension-language", class_files
, var_string_noescape
,
3100 "Set mapping between filename extension and source language.\n\
3101 Usage: set extension-language .foo bar",
3103 c
->function
.cfunc
= set_ext_lang_command
;
3105 add_info ("extensions", info_ext_lang_command
,
3106 "All filename extensions associated with a source language.");