1 /* Generic symbol file reading for the GNU debugger, GDB.
2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996
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"
55 int (*ui_load_progress_hook
) PARAMS ((char *, unsigned long));
56 void (*pre_add_symbol_hook
) PARAMS ((char *));
57 void (*post_add_symbol_hook
) PARAMS ((void));
59 /* Global variables owned by this file */
60 int readnow_symbol_files
; /* Read full symbols immediately */
62 struct complaint oldsyms_complaint
= {
63 "Replacing old symbols for `%s'", 0, 0
66 struct complaint empty_symtab_complaint
= {
67 "Empty symbol table found for `%s'", 0, 0
70 /* External variables and functions referenced. */
72 extern int info_verbose
;
74 extern void report_transfer_performance
PARAMS ((unsigned long,
77 /* Functions this file defines */
80 static int simple_read_overlay_region_table
PARAMS ((void));
81 static void simple_free_overlay_region_table
PARAMS ((void));
84 static void set_initial_language
PARAMS ((void));
86 static void load_command
PARAMS ((char *, int));
88 static void add_symbol_file_command
PARAMS ((char *, int));
90 static void add_shared_symbol_files_command
PARAMS ((char *, int));
92 static void cashier_psymtab
PARAMS ((struct partial_symtab
*));
94 static int compare_psymbols
PARAMS ((const void *, const void *));
96 static int compare_symbols
PARAMS ((const void *, const void *));
98 static bfd
*symfile_bfd_open
PARAMS ((char *));
100 static void find_sym_fns
PARAMS ((struct objfile
*));
102 static void decrement_reading_symtab
PARAMS ((void *));
104 /* List of all available sym_fns. On gdb startup, each object file reader
105 calls add_symtab_fns() to register information on each format it is
108 static struct sym_fns
*symtab_fns
= NULL
;
110 /* Flag for whether user will be reloading symbols multiple times.
111 Defaults to ON for VxWorks, otherwise OFF. */
113 #ifdef SYMBOL_RELOADING_DEFAULT
114 int symbol_reloading
= SYMBOL_RELOADING_DEFAULT
;
116 int symbol_reloading
= 0;
119 /* If true, then shared library symbols will be added automatically
120 when the inferior is created, new libraries are loaded, or when
121 attaching to the inferior. This is almost always what users
122 will want to have happen; but for very large programs, the startup
123 time will be excessive, and so if this is a problem, the user can
124 clear this flag and then add the shared library symbols as needed.
125 Note that there is a potential for confusion, since if the shared
126 library symbols are not loaded, commands like "info fun" will *not*
127 report all the functions that are actually present. */
129 int auto_solib_add
= 1;
132 /* Since this function is called from within qsort, in an ANSI environment
133 it must conform to the prototype for qsort, which specifies that the
134 comparison function takes two "void *" pointers. */
137 compare_symbols (s1p
, s2p
)
141 register struct symbol
**s1
, **s2
;
143 s1
= (struct symbol
**) s1p
;
144 s2
= (struct symbol
**) s2p
;
146 return (STRCMP (SYMBOL_NAME (*s1
), SYMBOL_NAME (*s2
)));
153 compare_psymbols -- compare two partial symbols by name
157 Given pointers to pointers to two partial symbol table entries,
158 compare them by name and return -N, 0, or +N (ala strcmp).
159 Typically used by sorting routines like qsort().
163 Does direct compare of first two characters before punting
164 and passing to strcmp for longer compares. Note that the
165 original version had a bug whereby two null strings or two
166 identically named one character strings would return the
167 comparison of memory following the null byte.
172 compare_psymbols (s1p
, s2p
)
176 register char *st1
= SYMBOL_NAME (*(struct partial_symbol
**) s1p
);
177 register char *st2
= SYMBOL_NAME (*(struct partial_symbol
**) s2p
);
179 if ((st1
[0] - st2
[0]) || !st1
[0])
181 return (st1
[0] - st2
[0]);
183 else if ((st1
[1] - st2
[1]) || !st1
[1])
185 return (st1
[1] - st2
[1]);
189 return (STRCMP (st1
+ 2, st2
+ 2));
194 sort_pst_symbols (pst
)
195 struct partial_symtab
*pst
;
197 /* Sort the global list; don't sort the static list */
199 qsort (pst
-> objfile
-> global_psymbols
.list
+ pst
-> globals_offset
,
200 pst
-> n_global_syms
, sizeof (struct partial_symbol
*),
204 /* Call sort_block_syms to sort alphabetically the symbols of one block. */
208 register struct block
*b
;
210 qsort (&BLOCK_SYM (b
, 0), BLOCK_NSYMS (b
),
211 sizeof (struct symbol
*), compare_symbols
);
214 /* Call sort_symtab_syms to sort alphabetically
215 the symbols of each block of one symtab. */
219 register struct symtab
*s
;
221 register struct blockvector
*bv
;
224 register struct block
*b
;
228 bv
= BLOCKVECTOR (s
);
229 nbl
= BLOCKVECTOR_NBLOCKS (bv
);
230 for (i
= 0; i
< nbl
; i
++)
232 b
= BLOCKVECTOR_BLOCK (bv
, i
);
233 if (BLOCK_SHOULD_SORT (b
))
238 /* Make a null terminated copy of the string at PTR with SIZE characters in
239 the obstack pointed to by OBSTACKP . Returns the address of the copy.
240 Note that the string at PTR does not have to be null terminated, I.E. it
241 may be part of a larger string and we are only saving a substring. */
244 obsavestring (ptr
, size
, obstackp
)
247 struct obstack
*obstackp
;
249 register char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
250 /* Open-coded memcpy--saves function call time. These strings are usually
251 short. FIXME: Is this really still true with a compiler that can
254 register char *p1
= ptr
;
255 register char *p2
= p
;
256 char *end
= ptr
+ size
;
264 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
265 in the obstack pointed to by OBSTACKP. */
268 obconcat (obstackp
, s1
, s2
, s3
)
269 struct obstack
*obstackp
;
270 const char *s1
, *s2
, *s3
;
272 register int len
= strlen (s1
) + strlen (s2
) + strlen (s3
) + 1;
273 register char *val
= (char *) obstack_alloc (obstackp
, len
);
280 /* True if we are nested inside psymtab_to_symtab. */
282 int currently_reading_symtab
= 0;
285 decrement_reading_symtab (dummy
)
288 currently_reading_symtab
--;
291 /* Get the symbol table that corresponds to a partial_symtab.
292 This is fast after the first time you do it. In fact, there
293 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
297 psymtab_to_symtab (pst
)
298 register struct partial_symtab
*pst
;
300 /* If it's been looked up before, return it. */
304 /* If it has not yet been read in, read it. */
307 struct cleanup
*back_to
= make_cleanup (decrement_reading_symtab
, NULL
);
308 currently_reading_symtab
++;
309 (*pst
->read_symtab
) (pst
);
310 do_cleanups (back_to
);
316 /* Initialize entry point information for this objfile. */
319 init_entry_point_info (objfile
)
320 struct objfile
*objfile
;
322 /* Save startup file's range of PC addresses to help blockframe.c
323 decide where the bottom of the stack is. */
325 if (bfd_get_file_flags (objfile
-> obfd
) & EXEC_P
)
327 /* Executable file -- record its entry point so we'll recognize
328 the startup file because it contains the entry point. */
329 objfile
-> ei
.entry_point
= bfd_get_start_address (objfile
-> obfd
);
333 /* Examination of non-executable.o files. Short-circuit this stuff. */
334 objfile
-> ei
.entry_point
= INVALID_ENTRY_POINT
;
336 objfile
-> ei
.entry_file_lowpc
= INVALID_ENTRY_LOWPC
;
337 objfile
-> ei
.entry_file_highpc
= INVALID_ENTRY_HIGHPC
;
338 objfile
-> ei
.entry_func_lowpc
= INVALID_ENTRY_LOWPC
;
339 objfile
-> ei
.entry_func_highpc
= INVALID_ENTRY_HIGHPC
;
340 objfile
-> ei
.main_func_lowpc
= INVALID_ENTRY_LOWPC
;
341 objfile
-> ei
.main_func_highpc
= INVALID_ENTRY_HIGHPC
;
344 /* Get current entry point address. */
347 entry_point_address()
349 return symfile_objfile
? symfile_objfile
->ei
.entry_point
: 0;
352 /* Remember the lowest-addressed loadable section we've seen.
353 This function is called via bfd_map_over_sections.
355 In case of equal vmas, the section with the largest size becomes the
356 lowest-addressed loadable section.
358 If the vmas and sizes are equal, the last section is considered the
359 lowest-addressed loadable section. */
362 find_lowest_section (abfd
, sect
, obj
)
367 asection
**lowest
= (asection
**)obj
;
369 if (0 == (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
))
372 *lowest
= sect
; /* First loadable section */
373 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
374 *lowest
= sect
; /* A lower loadable section */
375 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
376 && (bfd_section_size (abfd
, (*lowest
))
377 <= bfd_section_size (abfd
, sect
)))
381 /* Parse the user's idea of an offset for dynamic linking, into our idea
382 of how to represent it for fast symbol reading. This is the default
383 version of the sym_fns.sym_offsets function for symbol readers that
384 don't need to do anything special. It allocates a section_offsets table
385 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
387 struct section_offsets
*
388 default_symfile_offsets (objfile
, addr
)
389 struct objfile
*objfile
;
392 struct section_offsets
*section_offsets
;
395 objfile
->num_sections
= SECT_OFF_MAX
;
396 section_offsets
= (struct section_offsets
*)
397 obstack_alloc (&objfile
-> psymbol_obstack
, SIZEOF_SECTION_OFFSETS
);
399 for (i
= 0; i
< SECT_OFF_MAX
; i
++)
400 ANOFFSET (section_offsets
, i
) = addr
;
402 return section_offsets
;
406 /* Process a symbol file, as either the main file or as a dynamically
409 NAME is the file name (which will be tilde-expanded and made
410 absolute herein) (but we don't free or modify NAME itself).
411 FROM_TTY says how verbose to be. MAINLINE specifies whether this
412 is the main symbol file, or whether it's an extra symbol file such
413 as dynamically loaded code. If !mainline, ADDR is the address
414 where the text segment was loaded. If VERBO, the caller has printed
415 a verbose message about the symbol reading (and complaints can be
416 more terse about it). */
419 syms_from_objfile (objfile
, addr
, mainline
, verbo
)
420 struct objfile
*objfile
;
425 struct section_offsets
*section_offsets
;
426 asection
*lowest_sect
;
427 struct cleanup
*old_chain
;
429 init_entry_point_info (objfile
);
430 find_sym_fns (objfile
);
432 /* Make sure that partially constructed symbol tables will be cleaned up
433 if an error occurs during symbol reading. */
434 old_chain
= make_cleanup (free_objfile
, objfile
);
438 /* We will modify the main symbol table, make sure that all its users
439 will be cleaned up if an error occurs during symbol reading. */
440 make_cleanup (clear_symtab_users
, 0);
442 /* Since no error yet, throw away the old symbol table. */
444 if (symfile_objfile
!= NULL
)
446 free_objfile (symfile_objfile
);
447 symfile_objfile
= NULL
;
450 /* Currently we keep symbols from the add-symbol-file command.
451 If the user wants to get rid of them, they should do "symbol-file"
452 without arguments first. Not sure this is the best behavior
455 (*objfile
-> sf
-> sym_new_init
) (objfile
);
458 /* Convert addr into an offset rather than an absolute address.
459 We find the lowest address of a loaded segment in the objfile,
460 and assume that <addr> is where that got loaded. Due to historical
461 precedent, we warn if that doesn't happen to be a text segment. */
465 addr
= 0; /* No offset from objfile addresses. */
469 lowest_sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
470 if (lowest_sect
== NULL
)
471 bfd_map_over_sections (objfile
->obfd
, find_lowest_section
,
474 if (lowest_sect
== NULL
)
475 warning ("no loadable sections found in added symbol-file %s",
477 else if ((bfd_get_section_flags (objfile
->obfd
, lowest_sect
) & SEC_CODE
)
479 /* FIXME-32x64--assumes bfd_vma fits in long. */
480 warning ("Lowest section in %s is %s at 0x%lx",
482 bfd_section_name (objfile
->obfd
, lowest_sect
),
483 (unsigned long) bfd_section_vma (objfile
->obfd
, lowest_sect
));
486 addr
-= bfd_section_vma (objfile
->obfd
, lowest_sect
);
489 /* Initialize symbol reading routines for this objfile, allow complaints to
490 appear for this new file, and record how verbose to be, then do the
491 initial symbol reading for this file. */
493 (*objfile
-> sf
-> sym_init
) (objfile
);
494 clear_complaints (1, verbo
);
496 section_offsets
= (*objfile
-> sf
-> sym_offsets
) (objfile
, addr
);
497 objfile
->section_offsets
= section_offsets
;
499 #ifndef IBM6000_TARGET
500 /* This is a SVR4/SunOS specific hack, I think. In any event, it
501 screws RS/6000. sym_offsets should be doing this sort of thing,
502 because it knows the mapping between bfd sections and
504 /* This is a hack. As far as I can tell, section offsets are not
505 target dependent. They are all set to addr with a couple of
506 exceptions. The exceptions are sysvr4 shared libraries, whose
507 offsets are kept in solib structures anyway and rs6000 xcoff
508 which handles shared libraries in a completely unique way.
510 Section offsets are built similarly, except that they are built
511 by adding addr in all cases because there is no clear mapping
512 from section_offsets into actual sections. Note that solib.c
513 has a different algorythm for finding section offsets.
515 These should probably all be collapsed into some target
516 independent form of shared library support. FIXME. */
520 struct obj_section
*s
;
522 for (s
= objfile
->sections
; s
< objfile
->sections_end
; ++s
)
524 s
->addr
-= s
->offset
;
526 s
->endaddr
-= s
->offset
;
531 #endif /* not IBM6000_TARGET */
533 (*objfile
-> sf
-> sym_read
) (objfile
, section_offsets
, mainline
);
535 if (!have_partial_symbols () && !have_full_symbols ())
538 printf_filtered ("(no debugging symbols found)...");
542 /* Don't allow char * to have a typename (else would get caddr_t).
543 Ditto void *. FIXME: Check whether this is now done by all the
544 symbol readers themselves (many of them now do), and if so remove
547 TYPE_NAME (lookup_pointer_type (builtin_type_char
)) = 0;
548 TYPE_NAME (lookup_pointer_type (builtin_type_void
)) = 0;
550 /* Mark the objfile has having had initial symbol read attempted. Note
551 that this does not mean we found any symbols... */
553 objfile
-> flags
|= OBJF_SYMS
;
555 /* Discard cleanups as symbol reading was successful. */
557 discard_cleanups (old_chain
);
559 /* Call this after reading in a new symbol table to give target dependant code
560 a crack at the new symbols. For instance, this could be used to update the
561 values of target-specific symbols GDB needs to keep track of (such as
562 _sigtramp, or whatever). */
564 TARGET_SYMFILE_POSTREAD (objfile
);
567 /* Perform required actions after either reading in the initial
568 symbols for a new objfile, or mapping in the symbols from a reusable
572 new_symfile_objfile (objfile
, mainline
, verbo
)
573 struct objfile
*objfile
;
578 /* If this is the main symbol file we have to clean up all users of the
579 old main symbol file. Otherwise it is sufficient to fixup all the
580 breakpoints that may have been redefined by this symbol file. */
583 /* OK, make it the "real" symbol file. */
584 symfile_objfile
= objfile
;
586 clear_symtab_users ();
590 breakpoint_re_set ();
593 /* We're done reading the symbol file; finish off complaints. */
594 clear_complaints (0, verbo
);
597 /* Process a symbol file, as either the main file or as a dynamically
600 NAME is the file name (which will be tilde-expanded and made
601 absolute herein) (but we don't free or modify NAME itself).
602 FROM_TTY says how verbose to be. MAINLINE specifies whether this
603 is the main symbol file, or whether it's an extra symbol file such
604 as dynamically loaded code. If !mainline, ADDR is the address
605 where the text segment was loaded.
607 Upon success, returns a pointer to the objfile that was added.
608 Upon failure, jumps back to command level (never returns). */
611 symbol_file_add (name
, from_tty
, addr
, mainline
, mapped
, readnow
)
619 struct objfile
*objfile
;
620 struct partial_symtab
*psymtab
;
623 /* Open a bfd for the file, and give user a chance to burp if we'd be
624 interactively wiping out any existing symbols. */
626 abfd
= symfile_bfd_open (name
);
628 if ((have_full_symbols () || have_partial_symbols ())
631 && !query ("Load new symbol table from \"%s\"? ", name
))
632 error ("Not confirmed.");
634 objfile
= allocate_objfile (abfd
, mapped
);
636 /* If the objfile uses a mapped symbol file, and we have a psymtab for
637 it, then skip reading any symbols at this time. */
639 if ((objfile
-> flags
& OBJF_MAPPED
) && (objfile
-> flags
& OBJF_SYMS
))
641 /* We mapped in an existing symbol table file that already has had
642 initial symbol reading performed, so we can skip that part. Notify
643 the user that instead of reading the symbols, they have been mapped.
645 if (from_tty
|| info_verbose
)
647 printf_filtered ("Mapped symbols for %s...", name
);
649 gdb_flush (gdb_stdout
);
651 init_entry_point_info (objfile
);
652 find_sym_fns (objfile
);
656 /* We either created a new mapped symbol table, mapped an existing
657 symbol table file which has not had initial symbol reading
658 performed, or need to read an unmapped symbol table. */
659 if (pre_add_symbol_hook
)
660 pre_add_symbol_hook (name
);
661 if (from_tty
|| info_verbose
)
663 printf_filtered ("Reading symbols from %s...", name
);
665 gdb_flush (gdb_stdout
);
667 syms_from_objfile (objfile
, addr
, mainline
, from_tty
);
670 /* We now have at least a partial symbol table. Check to see if the
671 user requested that all symbols be read on initial access via either
672 the gdb startup command line or on a per symbol file basis. Expand
673 all partial symbol tables for this objfile if so. */
675 if (readnow
|| readnow_symbol_files
)
677 if (from_tty
|| info_verbose
)
679 printf_filtered ("expanding to full symbols...");
681 gdb_flush (gdb_stdout
);
684 for (psymtab
= objfile
-> psymtabs
;
686 psymtab
= psymtab
-> next
)
688 psymtab_to_symtab (psymtab
);
692 if (post_add_symbol_hook
)
693 post_add_symbol_hook ();
694 if (from_tty
|| info_verbose
)
696 printf_filtered ("done.\n");
697 gdb_flush (gdb_stdout
);
700 new_symfile_objfile (objfile
, mainline
, from_tty
);
702 target_new_objfile (objfile
);
707 /* This is the symbol-file command. Read the file, analyze its
708 symbols, and add a struct symtab to a symtab list. The syntax of
709 the command is rather bizarre--(1) buildargv implements various
710 quoting conventions which are undocumented and have little or
711 nothing in common with the way things are quoted (or not quoted)
712 elsewhere in GDB, (2) options are used, which are not generally
713 used in GDB (perhaps "set mapped on", "set readnow on" would be
714 better), (3) the order of options matters, which is contrary to GNU
715 conventions (because it is confusing and inconvenient). */
718 symbol_file_command (args
, from_tty
)
724 CORE_ADDR text_relocation
= 0; /* text_relocation */
725 struct cleanup
*cleanups
;
733 if ((have_full_symbols () || have_partial_symbols ())
735 && !query ("Discard symbol table from `%s'? ",
736 symfile_objfile
-> name
))
737 error ("Not confirmed.");
738 free_all_objfiles ();
739 symfile_objfile
= NULL
;
742 printf_unfiltered ("No symbol file now.\n");
747 if ((argv
= buildargv (args
)) == NULL
)
751 cleanups
= make_cleanup (freeargv
, (char *) argv
);
752 while (*argv
!= NULL
)
754 if (STREQ (*argv
, "-mapped"))
758 else if (STREQ (*argv
, "-readnow"))
762 else if (**argv
== '-')
764 error ("unknown option `%s'", *argv
);
772 /* this is for rombug remote only, to get the text relocation by
773 using link command */
774 p
= strrchr(name
, '/');
778 target_link(p
, &text_relocation
);
780 if (text_relocation
== (CORE_ADDR
)0)
782 else if (text_relocation
== (CORE_ADDR
)-1)
783 symbol_file_add (name
, from_tty
, (CORE_ADDR
)0, 1, mapped
,
786 symbol_file_add (name
, from_tty
, (CORE_ADDR
)text_relocation
,
789 /* Getting new symbols may change our opinion about what is
791 reinit_frame_cache ();
793 set_initial_language ();
800 error ("no symbol file name was specified");
802 do_cleanups (cleanups
);
806 /* Set the initial language.
808 A better solution would be to record the language in the psymtab when reading
809 partial symbols, and then use it (if known) to set the language. This would
810 be a win for formats that encode the language in an easily discoverable place,
811 such as DWARF. For stabs, we can jump through hoops looking for specially
812 named symbols or try to intuit the language from the specific type of stabs
813 we find, but we can't do that until later when we read in full symbols.
817 set_initial_language ()
819 struct partial_symtab
*pst
;
820 enum language lang
= language_unknown
;
822 pst
= find_main_psymtab ();
825 if (pst
-> filename
!= NULL
)
827 lang
= deduce_language_from_filename (pst
-> filename
);
829 if (lang
== language_unknown
)
831 /* Make C the default language */
835 expected_language
= current_language
; /* Don't warn the user */
839 /* Open file specified by NAME and hand it off to BFD for preliminary
840 analysis. Result is a newly initialized bfd *, which includes a newly
841 malloc'd` copy of NAME (tilde-expanded and made absolute).
842 In case of trouble, error() is called. */
845 symfile_bfd_open (name
)
852 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy */
854 /* Look down path for it, allocate 2nd new malloc'd copy. */
855 desc
= openp (getenv ("PATH"), 1, name
, O_RDONLY
| O_BINARY
, 0, &absolute_name
);
856 #if defined(__GO32__) || defined(_WIN32)
859 char *exename
= alloca (strlen (name
) + 5);
860 strcat (strcpy (exename
, name
), ".exe");
861 desc
= openp (getenv ("PATH"), 1, exename
, O_RDONLY
| O_BINARY
,
867 make_cleanup (free
, name
);
868 perror_with_name (name
);
870 free (name
); /* Free 1st new malloc'd copy */
871 name
= absolute_name
; /* Keep 2nd malloc'd copy in bfd */
872 /* It'll be freed in free_objfile(). */
874 sym_bfd
= bfd_fdopenr (name
, gnutarget
, desc
);
878 make_cleanup (free
, name
);
879 error ("\"%s\": can't open to read symbols: %s.", name
,
880 bfd_errmsg (bfd_get_error ()));
882 sym_bfd
->cacheable
= true;
884 if (!bfd_check_format (sym_bfd
, bfd_object
))
886 /* FIXME: should be checking for errors from bfd_close (for one thing,
887 on error it does not free all the storage associated with the
889 bfd_close (sym_bfd
); /* This also closes desc */
890 make_cleanup (free
, name
);
891 error ("\"%s\": can't read symbols: %s.", name
,
892 bfd_errmsg (bfd_get_error ()));
898 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
899 startup by the _initialize routine in each object file format reader,
900 to register information about each format the the reader is prepared
907 sf
->next
= symtab_fns
;
912 /* Initialize to read symbols from the symbol file sym_bfd. It either
913 returns or calls error(). The result is an initialized struct sym_fns
914 in the objfile structure, that contains cached information about the
918 find_sym_fns (objfile
)
919 struct objfile
*objfile
;
922 enum bfd_flavour our_flavour
= bfd_get_flavour (objfile
-> obfd
);
923 char *our_target
= bfd_get_target (objfile
-> obfd
);
925 /* Special kludge for RS/6000 and PowerMac. See xcoffread.c. */
926 if (STREQ (our_target
, "aixcoff-rs6000") ||
927 STREQ (our_target
, "xcoff-powermac"))
928 our_flavour
= (enum bfd_flavour
)-1;
930 /* Special kludge for apollo. See dstread.c. */
931 if (STREQN (our_target
, "apollo", 6))
932 our_flavour
= (enum bfd_flavour
)-2;
934 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
-> next
)
936 if (our_flavour
== sf
-> sym_flavour
)
942 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
943 bfd_get_target (objfile
-> obfd
));
946 /* This function runs the load command of our current target. */
949 load_command (arg
, from_tty
)
954 arg
= get_exec_file (1);
955 target_load (arg
, from_tty
);
958 /* This version of "load" should be usable for any target. Currently
959 it is just used for remote targets, not inftarg.c or core files,
960 on the theory that only in that case is it useful.
962 Avoiding xmodem and the like seems like a win (a) because we don't have
963 to worry about finding it, and (b) On VMS, fork() is very slow and so
964 we don't want to run a subprocess. On the other hand, I'm not sure how
965 performance compares. */
966 #define GENERIC_LOAD_CHUNK 256
967 #define VALIDATE_DOWNLOAD 0
969 generic_load (filename
, from_tty
)
973 struct cleanup
*old_cleanups
;
976 time_t start_time
, end_time
; /* Start and end times of download */
977 unsigned long data_count
= 0; /* Number of bytes transferred to memory */
979 unsigned long load_offset
= 0; /* offset to add to vma for each section */
980 char buf
[GENERIC_LOAD_CHUNK
+8];
981 #if VALIDATE_DOWNLOAD
982 char verify_buffer
[GENERIC_LOAD_CHUNK
+8] ;
985 /* enable user to specify address for downloading as 2nd arg to load */
986 n
= sscanf(filename
, "%s 0x%lx", buf
, &load_offset
);
992 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
993 if (loadfile_bfd
== NULL
)
995 perror_with_name (filename
);
998 /* FIXME: should be checking for errors from bfd_close (for one thing,
999 on error it does not free all the storage associated with the
1001 old_cleanups
= make_cleanup (bfd_close
, loadfile_bfd
);
1003 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
1005 error ("\"%s\" is not an object file: %s", filename
,
1006 bfd_errmsg (bfd_get_error ()));
1009 start_time
= time (NULL
);
1011 for (s
= loadfile_bfd
->sections
; s
; s
= s
->next
)
1013 if (s
->flags
& SEC_LOAD
)
1017 size
= bfd_get_section_size_before_reloc (s
);
1021 struct cleanup
*old_chain
;
1023 unsigned long l
= size
;
1029 l
= l
> GENERIC_LOAD_CHUNK
? GENERIC_LOAD_CHUNK
: l
;
1031 buffer
= xmalloc (size
);
1032 old_chain
= make_cleanup (free
, buffer
);
1037 /* Is this really necessary? I guess it gives the user something
1038 to look at during a long download. */
1039 printf_filtered ("Loading section %s, size 0x%lx lma ",
1040 bfd_get_section_name (loadfile_bfd
, s
),
1041 (unsigned long) size
);
1042 print_address_numeric (lma
, 1, gdb_stdout
);
1043 printf_filtered ("\n");
1045 bfd_get_section_contents (loadfile_bfd
, s
, buffer
, 0, size
);
1047 sect
= (char *) bfd_get_section_name (loadfile_bfd
, s
);
1051 len
= (size
- sent
) < l
? (size
- sent
) : l
;
1053 err
= target_write_memory (lma
, buffer
, len
);
1054 if (ui_load_progress_hook
)
1055 if (ui_load_progress_hook (sect
, sent
))
1056 error ("Canceled the download");
1057 #if VALIDATE_DOWNLOAD
1058 /* Broken memories and broken monitors manifest themselves
1059 here when bring new computers to life.
1060 This doubles already slow downloads.
1064 target_read_memory(lma
,verify_buffer
,len
) ;
1065 if (0 != bcmp(buffer
,verify_buffer
,len
))
1066 error("Download verify failed at %08x",
1067 (unsigned long)lma
) ;
1075 while (err
== 0 && sent
< size
);
1078 error ("Memory access error while loading section %s.",
1079 bfd_get_section_name (loadfile_bfd
, s
));
1081 do_cleanups (old_chain
);
1086 end_time
= time (NULL
);
1088 unsigned long entry
;
1089 entry
= bfd_get_start_address(loadfile_bfd
) ;
1090 printf_filtered ("Start address 0x%lx , load size %d\n", entry
,data_count
);
1091 /* We were doing this in remote-mips.c, I suspect it is right
1092 for other targets too. */
1096 /* FIXME: are we supposed to call symbol_file_add or not? According to
1097 a comment from remote-mips.c (where a call to symbol_file_add was
1098 commented out), making the call confuses GDB if more than one file is
1099 loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c
1102 report_transfer_performance (data_count
, start_time
, end_time
);
1104 do_cleanups (old_cleanups
);
1107 /* Report how fast the transfer went. */
1110 report_transfer_performance (data_count
, start_time
, end_time
)
1111 unsigned long data_count
;
1112 time_t start_time
, end_time
;
1114 printf_filtered ("Transfer rate: ");
1115 if (end_time
!= start_time
)
1116 printf_filtered ("%d bits/sec",
1117 (data_count
* 8) / (end_time
- start_time
));
1119 printf_filtered ("%d bits in <1 sec", (data_count
* 8));
1120 printf_filtered (".\n");
1123 /* This function allows the addition of incrementally linked object files.
1124 It does not modify any state in the target, only in the debugger. */
1128 add_symbol_file_command (args
, from_tty
)
1133 CORE_ADDR text_addr
;
1142 error ("add-symbol-file takes a file name and an address");
1145 /* Make a copy of the string that we can safely write into. */
1147 args
= strdup (args
);
1148 make_cleanup (free
, args
);
1150 /* Pick off any -option args and the file name. */
1152 while ((*args
!= '\000') && (name
== NULL
))
1154 while (isspace (*args
)) {args
++;}
1156 while ((*args
!= '\000') && !isspace (*args
)) {args
++;}
1157 if (*args
!= '\000')
1165 else if (STREQ (arg
, "-mapped"))
1169 else if (STREQ (arg
, "-readnow"))
1175 error ("unknown option `%s'", arg
);
1179 /* After picking off any options and the file name, args should be
1180 left pointing at the remainder of the command line, which should
1181 be the address expression to evaluate. */
1185 error ("add-symbol-file takes a file name");
1187 name
= tilde_expand (name
);
1188 make_cleanup (free
, name
);
1190 if (*args
!= '\000')
1192 text_addr
= parse_and_eval_address (args
);
1196 target_link(name
, &text_addr
);
1197 if (text_addr
== (CORE_ADDR
)-1)
1198 error("Don't know how to get text start location for this file");
1201 /* FIXME-32x64: Assumes text_addr fits in a long. */
1202 if (!query ("add symbol table from file \"%s\" at text_addr = %s?\n",
1203 name
, local_hex_string ((unsigned long)text_addr
)))
1204 error ("Not confirmed.");
1206 symbol_file_add (name
, 0, text_addr
, 0, mapped
, readnow
);
1208 /* Getting new symbols may change our opinion about what is
1210 reinit_frame_cache ();
1214 add_shared_symbol_files_command (args
, from_tty
)
1218 #ifdef ADD_SHARED_SYMBOL_FILES
1219 ADD_SHARED_SYMBOL_FILES (args
, from_tty
);
1221 error ("This command is not available in this configuration of GDB.");
1225 /* Re-read symbols if a symbol-file has changed. */
1229 struct objfile
*objfile
;
1232 struct stat new_statbuf
;
1235 /* With the addition of shared libraries, this should be modified,
1236 the load time should be saved in the partial symbol tables, since
1237 different tables may come from different source files. FIXME.
1238 This routine should then walk down each partial symbol table
1239 and see if the symbol table that it originates from has been changed */
1241 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
) {
1242 if (objfile
->obfd
) {
1243 #ifdef IBM6000_TARGET
1244 /* If this object is from a shared library, then you should
1245 stat on the library name, not member name. */
1247 if (objfile
->obfd
->my_archive
)
1248 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
1251 res
= stat (objfile
->name
, &new_statbuf
);
1253 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1254 printf_filtered ("`%s' has disappeared; keeping its symbols.\n",
1258 new_modtime
= new_statbuf
.st_mtime
;
1259 if (new_modtime
!= objfile
->mtime
)
1261 struct cleanup
*old_cleanups
;
1262 struct section_offsets
*offsets
;
1264 int section_offsets_size
;
1265 char *obfd_filename
;
1267 printf_filtered ("`%s' has changed; re-reading symbols.\n",
1270 /* There are various functions like symbol_file_add,
1271 symfile_bfd_open, syms_from_objfile, etc., which might
1272 appear to do what we want. But they have various other
1273 effects which we *don't* want. So we just do stuff
1274 ourselves. We don't worry about mapped files (for one thing,
1275 any mapped file will be out of date). */
1277 /* If we get an error, blow away this objfile (not sure if
1278 that is the correct response for things like shared
1280 old_cleanups
= make_cleanup (free_objfile
, objfile
);
1281 /* We need to do this whenever any symbols go away. */
1282 make_cleanup (clear_symtab_users
, 0);
1284 /* Clean up any state BFD has sitting around. We don't need
1285 to close the descriptor but BFD lacks a way of closing the
1286 BFD without closing the descriptor. */
1287 obfd_filename
= bfd_get_filename (objfile
->obfd
);
1288 if (!bfd_close (objfile
->obfd
))
1289 error ("Can't close BFD for %s: %s", objfile
->name
,
1290 bfd_errmsg (bfd_get_error ()));
1291 objfile
->obfd
= bfd_openr (obfd_filename
, gnutarget
);
1292 if (objfile
->obfd
== NULL
)
1293 error ("Can't open %s to read symbols.", objfile
->name
);
1294 /* bfd_openr sets cacheable to true, which is what we want. */
1295 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
1296 error ("Can't read symbols from %s: %s.", objfile
->name
,
1297 bfd_errmsg (bfd_get_error ()));
1299 /* Save the offsets, we will nuke them with the rest of the
1301 num_offsets
= objfile
->num_sections
;
1302 section_offsets_size
=
1303 sizeof (struct section_offsets
)
1304 + sizeof (objfile
->section_offsets
->offsets
) * num_offsets
;
1305 offsets
= (struct section_offsets
*) alloca (section_offsets_size
);
1306 memcpy (offsets
, objfile
->section_offsets
, section_offsets_size
);
1308 /* Nuke all the state that we will re-read. Much of the following
1309 code which sets things to NULL really is necessary to tell
1310 other parts of GDB that there is nothing currently there. */
1312 /* FIXME: Do we have to free a whole linked list, or is this
1314 if (objfile
->global_psymbols
.list
)
1315 mfree (objfile
->md
, objfile
->global_psymbols
.list
);
1316 memset (&objfile
-> global_psymbols
, 0,
1317 sizeof (objfile
-> global_psymbols
));
1318 if (objfile
->static_psymbols
.list
)
1319 mfree (objfile
->md
, objfile
->static_psymbols
.list
);
1320 memset (&objfile
-> static_psymbols
, 0,
1321 sizeof (objfile
-> static_psymbols
));
1323 /* Free the obstacks for non-reusable objfiles */
1324 obstack_free (&objfile
-> psymbol_cache
.cache
, 0);
1325 memset (&objfile
-> psymbol_cache
, 0,
1326 sizeof (objfile
-> psymbol_cache
));
1327 obstack_free (&objfile
-> psymbol_obstack
, 0);
1328 obstack_free (&objfile
-> symbol_obstack
, 0);
1329 obstack_free (&objfile
-> type_obstack
, 0);
1330 objfile
->sections
= NULL
;
1331 objfile
->symtabs
= NULL
;
1332 objfile
->psymtabs
= NULL
;
1333 objfile
->free_psymtabs
= NULL
;
1334 objfile
->msymbols
= NULL
;
1335 objfile
->minimal_symbol_count
= 0;
1336 objfile
->fundamental_types
= NULL
;
1337 if (objfile
-> sf
!= NULL
)
1339 (*objfile
-> sf
-> sym_finish
) (objfile
);
1342 /* We never make this a mapped file. */
1343 objfile
-> md
= NULL
;
1344 /* obstack_specify_allocation also initializes the obstack so
1346 obstack_specify_allocation (&objfile
-> psymbol_cache
.cache
, 0, 0,
1348 obstack_specify_allocation (&objfile
-> psymbol_obstack
, 0, 0,
1350 obstack_specify_allocation (&objfile
-> symbol_obstack
, 0, 0,
1352 obstack_specify_allocation (&objfile
-> type_obstack
, 0, 0,
1354 if (build_objfile_section_table (objfile
))
1356 error ("Can't find the file sections in `%s': %s",
1357 objfile
-> name
, bfd_errmsg (bfd_get_error ()));
1360 /* We use the same section offsets as from last time. I'm not
1361 sure whether that is always correct for shared libraries. */
1362 objfile
->section_offsets
= (struct section_offsets
*)
1363 obstack_alloc (&objfile
-> psymbol_obstack
, section_offsets_size
);
1364 memcpy (objfile
->section_offsets
, offsets
, section_offsets_size
);
1365 objfile
->num_sections
= num_offsets
;
1367 /* What the hell is sym_new_init for, anyway? The concept of
1368 distinguishing between the main file and additional files
1369 in this way seems rather dubious. */
1370 if (objfile
== symfile_objfile
)
1371 (*objfile
->sf
->sym_new_init
) (objfile
);
1373 (*objfile
->sf
->sym_init
) (objfile
);
1374 clear_complaints (1, 1);
1375 /* The "mainline" parameter is a hideous hack; I think leaving it
1376 zero is OK since dbxread.c also does what it needs to do if
1377 objfile->global_psymbols.size is 0. */
1378 (*objfile
->sf
->sym_read
) (objfile
, objfile
->section_offsets
, 0);
1379 if (!have_partial_symbols () && !have_full_symbols ())
1382 printf_filtered ("(no debugging symbols found)\n");
1385 objfile
-> flags
|= OBJF_SYMS
;
1387 /* We're done reading the symbol file; finish off complaints. */
1388 clear_complaints (0, 1);
1390 /* Getting new symbols may change our opinion about what is
1393 reinit_frame_cache ();
1395 /* Discard cleanups as symbol reading was successful. */
1396 discard_cleanups (old_cleanups
);
1398 /* If the mtime has changed between the time we set new_modtime
1399 and now, we *want* this to be out of date, so don't call stat
1401 objfile
->mtime
= new_modtime
;
1404 /* Call this after reading in a new symbol table to give target
1405 dependant code a crack at the new symbols. For instance, this
1406 could be used to update the values of target-specific symbols GDB
1407 needs to keep track of (such as _sigtramp, or whatever). */
1409 TARGET_SYMFILE_POSTREAD (objfile
);
1415 clear_symtab_users ();
1420 deduce_language_from_filename (filename
)
1427 else if (0 == (c
= strrchr (filename
, '.')))
1428 ; /* Get default. */
1429 else if (STREQ (c
, ".c"))
1431 else if (STREQ (c
, ".cc") || STREQ (c
, ".C") || STREQ (c
, ".cxx")
1432 || STREQ (c
, ".cpp") || STREQ (c
, ".cp") || STREQ (c
, ".c++"))
1433 return language_cplus
;
1434 /* start-sanitize-java */
1435 else if (STREQ (c
, ".java") || STREQ (c
, ".class"))
1436 return language_java
;
1437 /* end-sanitize-java */
1438 else if (STREQ (c
, ".ch") || STREQ (c
, ".c186") || STREQ (c
, ".c286"))
1439 return language_chill
;
1440 else if (STREQ (c
, ".f") || STREQ (c
, ".F"))
1441 return language_fortran
;
1442 else if (STREQ (c
, ".mod"))
1444 else if (STREQ (c
, ".s") || STREQ (c
, ".S"))
1445 return language_asm
;
1447 return language_unknown
; /* default */
1452 Allocate and partly initialize a new symbol table. Return a pointer
1453 to it. error() if no space.
1455 Caller must set these fields:
1461 initialize any EXTRA_SYMTAB_INFO
1462 possibly free_named_symtabs (symtab->filename);
1466 allocate_symtab (filename
, objfile
)
1468 struct objfile
*objfile
;
1470 register struct symtab
*symtab
;
1472 symtab
= (struct symtab
*)
1473 obstack_alloc (&objfile
-> symbol_obstack
, sizeof (struct symtab
));
1474 memset (symtab
, 0, sizeof (*symtab
));
1475 symtab
-> filename
= obsavestring (filename
, strlen (filename
),
1476 &objfile
-> symbol_obstack
);
1477 symtab
-> fullname
= NULL
;
1478 symtab
-> language
= deduce_language_from_filename (filename
);
1479 symtab
-> debugformat
= obsavestring ("unknown", 7,
1480 &objfile
-> symbol_obstack
);
1482 /* Hook it to the objfile it comes from */
1484 symtab
-> objfile
= objfile
;
1485 symtab
-> next
= objfile
-> symtabs
;
1486 objfile
-> symtabs
= symtab
;
1488 #ifdef INIT_EXTRA_SYMTAB_INFO
1489 INIT_EXTRA_SYMTAB_INFO (symtab
);
1495 struct partial_symtab
*
1496 allocate_psymtab (filename
, objfile
)
1498 struct objfile
*objfile
;
1500 struct partial_symtab
*psymtab
;
1502 if (objfile
-> free_psymtabs
)
1504 psymtab
= objfile
-> free_psymtabs
;
1505 objfile
-> free_psymtabs
= psymtab
-> next
;
1508 psymtab
= (struct partial_symtab
*)
1509 obstack_alloc (&objfile
-> psymbol_obstack
,
1510 sizeof (struct partial_symtab
));
1512 memset (psymtab
, 0, sizeof (struct partial_symtab
));
1513 psymtab
-> filename
= obsavestring (filename
, strlen (filename
),
1514 &objfile
-> psymbol_obstack
);
1515 psymtab
-> symtab
= NULL
;
1517 /* Prepend it to the psymtab list for the objfile it belongs to.
1518 Psymtabs are searched in most recent inserted -> least recent
1521 psymtab
-> objfile
= objfile
;
1522 psymtab
-> next
= objfile
-> psymtabs
;
1523 objfile
-> psymtabs
= psymtab
;
1526 struct partial_symtab
**prev_pst
;
1527 psymtab
-> objfile
= objfile
;
1528 psymtab
-> next
= NULL
;
1529 prev_pst
= &(objfile
-> psymtabs
);
1530 while ((*prev_pst
) != NULL
)
1531 prev_pst
= &((*prev_pst
) -> next
);
1532 (*prev_pst
) = psymtab
;
1540 discard_psymtab (pst
)
1541 struct partial_symtab
*pst
;
1543 struct partial_symtab
**prev_pst
;
1546 Empty psymtabs happen as a result of header files which don't
1547 have any symbols in them. There can be a lot of them. But this
1548 check is wrong, in that a psymtab with N_SLINE entries but
1549 nothing else is not empty, but we don't realize that. Fixing
1550 that without slowing things down might be tricky. */
1552 /* First, snip it out of the psymtab chain */
1554 prev_pst
= &(pst
->objfile
->psymtabs
);
1555 while ((*prev_pst
) != pst
)
1556 prev_pst
= &((*prev_pst
)->next
);
1557 (*prev_pst
) = pst
->next
;
1559 /* Next, put it on a free list for recycling */
1561 pst
->next
= pst
->objfile
->free_psymtabs
;
1562 pst
->objfile
->free_psymtabs
= pst
;
1566 /* Reset all data structures in gdb which may contain references to symbol
1570 clear_symtab_users ()
1572 /* Someday, we should do better than this, by only blowing away
1573 the things that really need to be blown. */
1574 clear_value_history ();
1576 clear_internalvars ();
1577 breakpoint_re_set ();
1578 set_default_breakpoint (0, 0, 0, 0);
1579 current_source_symtab
= 0;
1580 current_source_line
= 0;
1581 clear_pc_function_cache ();
1582 target_new_objfile (NULL
);
1585 /* clear_symtab_users_once:
1587 This function is run after symbol reading, or from a cleanup.
1588 If an old symbol table was obsoleted, the old symbol table
1589 has been blown away, but the other GDB data structures that may
1590 reference it have not yet been cleared or re-directed. (The old
1591 symtab was zapped, and the cleanup queued, in free_named_symtab()
1594 This function can be queued N times as a cleanup, or called
1595 directly; it will do all the work the first time, and then will be a
1596 no-op until the next time it is queued. This works by bumping a
1597 counter at queueing time. Much later when the cleanup is run, or at
1598 the end of symbol processing (in case the cleanup is discarded), if
1599 the queued count is greater than the "done-count", we do the work
1600 and set the done-count to the queued count. If the queued count is
1601 less than or equal to the done-count, we just ignore the call. This
1602 is needed because reading a single .o file will often replace many
1603 symtabs (one per .h file, for example), and we don't want to reset
1604 the breakpoints N times in the user's face.
1606 The reason we both queue a cleanup, and call it directly after symbol
1607 reading, is because the cleanup protects us in case of errors, but is
1608 discarded if symbol reading is successful. */
1611 /* FIXME: As free_named_symtabs is currently a big noop this function
1612 is no longer needed. */
1614 clear_symtab_users_once
PARAMS ((void));
1616 static int clear_symtab_users_queued
;
1617 static int clear_symtab_users_done
;
1620 clear_symtab_users_once ()
1622 /* Enforce once-per-`do_cleanups'-semantics */
1623 if (clear_symtab_users_queued
<= clear_symtab_users_done
)
1625 clear_symtab_users_done
= clear_symtab_users_queued
;
1627 clear_symtab_users ();
1631 /* Delete the specified psymtab, and any others that reference it. */
1634 cashier_psymtab (pst
)
1635 struct partial_symtab
*pst
;
1637 struct partial_symtab
*ps
, *pprev
= NULL
;
1640 /* Find its previous psymtab in the chain */
1641 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
) {
1648 /* Unhook it from the chain. */
1649 if (ps
== pst
->objfile
->psymtabs
)
1650 pst
->objfile
->psymtabs
= ps
->next
;
1652 pprev
->next
= ps
->next
;
1654 /* FIXME, we can't conveniently deallocate the entries in the
1655 partial_symbol lists (global_psymbols/static_psymbols) that
1656 this psymtab points to. These just take up space until all
1657 the psymtabs are reclaimed. Ditto the dependencies list and
1658 filename, which are all in the psymbol_obstack. */
1660 /* We need to cashier any psymtab that has this one as a dependency... */
1662 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
) {
1663 for (i
= 0; i
< ps
->number_of_dependencies
; i
++) {
1664 if (ps
->dependencies
[i
] == pst
) {
1665 cashier_psymtab (ps
);
1666 goto again
; /* Must restart, chain has been munged. */
1673 /* If a symtab or psymtab for filename NAME is found, free it along
1674 with any dependent breakpoints, displays, etc.
1675 Used when loading new versions of object modules with the "add-file"
1676 command. This is only called on the top-level symtab or psymtab's name;
1677 it is not called for subsidiary files such as .h files.
1679 Return value is 1 if we blew away the environment, 0 if not.
1680 FIXME. The return valu appears to never be used.
1682 FIXME. I think this is not the best way to do this. We should
1683 work on being gentler to the environment while still cleaning up
1684 all stray pointers into the freed symtab. */
1687 free_named_symtabs (name
)
1691 /* FIXME: With the new method of each objfile having it's own
1692 psymtab list, this function needs serious rethinking. In particular,
1693 why was it ever necessary to toss psymtabs with specific compilation
1694 unit filenames, as opposed to all psymtabs from a particular symbol
1696 Well, the answer is that some systems permit reloading of particular
1697 compilation units. We want to blow away any old info about these
1698 compilation units, regardless of which objfiles they arrived in. --gnu. */
1700 register struct symtab
*s
;
1701 register struct symtab
*prev
;
1702 register struct partial_symtab
*ps
;
1703 struct blockvector
*bv
;
1706 /* We only wack things if the symbol-reload switch is set. */
1707 if (!symbol_reloading
)
1710 /* Some symbol formats have trouble providing file names... */
1711 if (name
== 0 || *name
== '\0')
1714 /* Look for a psymtab with the specified name. */
1717 for (ps
= partial_symtab_list
; ps
; ps
= ps
->next
) {
1718 if (STREQ (name
, ps
->filename
)) {
1719 cashier_psymtab (ps
); /* Blow it away...and its little dog, too. */
1720 goto again2
; /* Must restart, chain has been munged */
1724 /* Look for a symtab with the specified name. */
1726 for (s
= symtab_list
; s
; s
= s
->next
)
1728 if (STREQ (name
, s
->filename
))
1735 if (s
== symtab_list
)
1736 symtab_list
= s
->next
;
1738 prev
->next
= s
->next
;
1740 /* For now, queue a delete for all breakpoints, displays, etc., whether
1741 or not they depend on the symtab being freed. This should be
1742 changed so that only those data structures affected are deleted. */
1744 /* But don't delete anything if the symtab is empty.
1745 This test is necessary due to a bug in "dbxread.c" that
1746 causes empty symtabs to be created for N_SO symbols that
1747 contain the pathname of the object file. (This problem
1748 has been fixed in GDB 3.9x). */
1750 bv
= BLOCKVECTOR (s
);
1751 if (BLOCKVECTOR_NBLOCKS (bv
) > 2
1752 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
))
1753 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)))
1755 complain (&oldsyms_complaint
, name
);
1757 clear_symtab_users_queued
++;
1758 make_cleanup (clear_symtab_users_once
, 0);
1761 complain (&empty_symtab_complaint
, name
);
1768 /* It is still possible that some breakpoints will be affected
1769 even though no symtab was found, since the file might have
1770 been compiled without debugging, and hence not be associated
1771 with a symtab. In order to handle this correctly, we would need
1772 to keep a list of text address ranges for undebuggable files.
1773 For now, we do nothing, since this is a fairly obscure case. */
1777 /* FIXME, what about the minimal symbol table? */
1784 /* Allocate and partially fill a partial symtab. It will be
1785 completely filled at the end of the symbol list.
1787 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
1788 is the address relative to which its symbols are (incremental) or 0
1792 struct partial_symtab
*
1793 start_psymtab_common (objfile
, section_offsets
,
1794 filename
, textlow
, global_syms
, static_syms
)
1795 struct objfile
*objfile
;
1796 struct section_offsets
*section_offsets
;
1799 struct partial_symbol
**global_syms
;
1800 struct partial_symbol
**static_syms
;
1802 struct partial_symtab
*psymtab
;
1804 psymtab
= allocate_psymtab (filename
, objfile
);
1805 psymtab
-> section_offsets
= section_offsets
;
1806 psymtab
-> textlow
= textlow
;
1807 psymtab
-> texthigh
= psymtab
-> textlow
; /* default */
1808 psymtab
-> globals_offset
= global_syms
- objfile
-> global_psymbols
.list
;
1809 psymtab
-> statics_offset
= static_syms
- objfile
-> static_psymbols
.list
;
1813 /* Add a symbol with a long value to a psymtab.
1814 Since one arg is a struct, we pass in a ptr and deref it (sigh). */
1817 add_psymbol_to_list (name
, namelength
, namespace, class, list
, val
, coreaddr
,
1821 namespace_enum
namespace;
1822 enum address_class
class;
1823 struct psymbol_allocation_list
*list
;
1824 long val
; /* Value as a long */
1825 CORE_ADDR coreaddr
; /* Value as a CORE_ADDR */
1826 enum language language
;
1827 struct objfile
*objfile
;
1829 register struct partial_symbol
*psym
;
1830 char *buf
= alloca (namelength
+ 1);
1831 /* psymbol is static so that there will be no uninitialized gaps in the
1832 structure which might contain random data, causing cache misses in
1834 static struct partial_symbol psymbol
;
1836 /* Create local copy of the partial symbol */
1837 memcpy (buf
, name
, namelength
);
1838 buf
[namelength
] = '\0';
1839 SYMBOL_NAME (&psymbol
) = bcache (buf
, namelength
+ 1, &objfile
->psymbol_cache
);
1840 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
1843 SYMBOL_VALUE (&psymbol
) = val
;
1847 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
1849 SYMBOL_SECTION (&psymbol
) = 0;
1850 SYMBOL_LANGUAGE (&psymbol
) = language
;
1851 PSYMBOL_NAMESPACE (&psymbol
) = namespace;
1852 PSYMBOL_CLASS (&psymbol
) = class;
1853 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
1855 /* Stash the partial symbol away in the cache */
1856 psym
= bcache (&psymbol
, sizeof (struct partial_symbol
), &objfile
->psymbol_cache
);
1858 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
1859 if (list
->next
>= list
->list
+ list
->size
)
1861 extend_psymbol_list (list
, objfile
);
1863 *list
->next
++ = psym
;
1864 OBJSTAT (objfile
, n_psyms
++);
1867 /* Initialize storage for partial symbols. */
1870 init_psymbol_list (objfile
, total_symbols
)
1871 struct objfile
*objfile
;
1874 /* Free any previously allocated psymbol lists. */
1876 if (objfile
-> global_psymbols
.list
)
1878 mfree (objfile
-> md
, (PTR
)objfile
-> global_psymbols
.list
);
1880 if (objfile
-> static_psymbols
.list
)
1882 mfree (objfile
-> md
, (PTR
)objfile
-> static_psymbols
.list
);
1885 /* Current best guess is that approximately a twentieth
1886 of the total symbols (in a debugging file) are global or static
1889 objfile
-> global_psymbols
.size
= total_symbols
/ 10;
1890 objfile
-> static_psymbols
.size
= total_symbols
/ 10;
1892 if (objfile
-> global_psymbols
.size
> 0)
1894 objfile
-> global_psymbols
.next
=
1895 objfile
-> global_psymbols
.list
= (struct partial_symbol
**)
1896 xmmalloc (objfile
-> md
, (objfile
-> global_psymbols
.size
1897 * sizeof (struct partial_symbol
*)));
1899 if (objfile
-> static_psymbols
.size
> 0)
1901 objfile
-> static_psymbols
.next
=
1902 objfile
-> static_psymbols
.list
= (struct partial_symbol
**)
1903 xmmalloc (objfile
-> md
, (objfile
-> static_psymbols
.size
1904 * sizeof (struct partial_symbol
*)));
1909 The following code implements an abstraction for debugging overlay sections.
1911 The target model is as follows:
1912 1) The gnu linker will permit multiple sections to be mapped into the
1913 same VMA, each with its own unique LMA (or load address).
1914 2) It is assumed that some runtime mechanism exists for mapping the
1915 sections, one by one, from the load address into the VMA address.
1916 3) This code provides a mechanism for gdb to keep track of which
1917 sections should be considered to be mapped from the VMA to the LMA.
1918 This information is used for symbol lookup, and memory read/write.
1919 For instance, if a section has been mapped then its contents
1920 should be read from the VMA, otherwise from the LMA.
1922 Two levels of debugger support for overlays are available. One is
1923 "manual", in which the debugger relies on the user to tell it which
1924 overlays are currently mapped. This level of support is
1925 implemented entirely in the core debugger, and the information about
1926 whether a section is mapped is kept in the objfile->obj_section table.
1928 The second level of support is "automatic", and is only available if
1929 the target-specific code provides functionality to read the target's
1930 overlay mapping table, and translate its contents for the debugger
1931 (by updating the mapped state information in the obj_section tables).
1933 The interface is as follows:
1935 overlay map <name> -- tell gdb to consider this section mapped
1936 overlay unmap <name> -- tell gdb to consider this section unmapped
1937 overlay list -- list the sections that GDB thinks are mapped
1938 overlay read-target -- get the target's state of what's mapped
1939 overlay off/manual/auto -- set overlay debugging state
1940 Functional interface:
1941 find_pc_mapped_section(pc): if the pc is in the range of a mapped
1942 section, return that section.
1943 find_pc_overlay(pc): find any overlay section that contains
1944 the pc, either in its VMA or its LMA
1945 overlay_is_mapped(sect): true if overlay is marked as mapped
1946 section_is_overlay(sect): true if section's VMA != LMA
1947 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
1948 pc_in_unmapped_range(...): true if pc belongs to section's LMA
1949 overlay_mapped_address(...): map an address from section's LMA to VMA
1950 overlay_unmapped_address(...): map an address from section's VMA to LMA
1951 symbol_overlayed_address(...): Return a "current" address for symbol:
1952 either in VMA or LMA depending on whether
1953 the symbol's section is currently mapped
1956 /* Overlay debugging state: */
1958 int overlay_debugging
= 0; /* 0 == off, 1 == manual, -1 == auto */
1959 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
1961 /* Target vector for refreshing overlay mapped state */
1962 static void simple_overlay_update
PARAMS ((struct obj_section
*));
1963 void (*target_overlay_update
) PARAMS ((struct obj_section
*))
1964 = simple_overlay_update
;
1966 /* Function: section_is_overlay (SECTION)
1967 Returns true if SECTION has VMA not equal to LMA, ie.
1968 SECTION is loaded at an address different from where it will "run". */
1971 section_is_overlay (section
)
1974 if (overlay_debugging
)
1975 if (section
&& section
->lma
!= 0 &&
1976 section
->vma
!= section
->lma
)
1982 /* Function: overlay_invalidate_all (void)
1983 Invalidate the mapped state of all overlay sections (mark it as stale). */
1986 overlay_invalidate_all ()
1988 struct objfile
*objfile
;
1989 struct obj_section
*sect
;
1991 ALL_OBJSECTIONS (objfile
, sect
)
1992 if (section_is_overlay (sect
->the_bfd_section
))
1993 sect
->ovly_mapped
= -1;
1996 /* Function: overlay_is_mapped (SECTION)
1997 Returns true if section is an overlay, and is currently mapped.
1998 Private: public access is thru function section_is_mapped.
2000 Access to the ovly_mapped flag is restricted to this function, so
2001 that we can do automatic update. If the global flag
2002 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2003 overlay_invalidate_all. If the mapped state of the particular
2004 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2007 overlay_is_mapped (osect
)
2008 struct obj_section
*osect
;
2010 if (osect
== 0 || !section_is_overlay (osect
->the_bfd_section
))
2013 switch (overlay_debugging
)
2016 case 0: return 0; /* overlay debugging off */
2017 case -1: /* overlay debugging automatic */
2018 /* Unles there is a target_overlay_update function,
2019 there's really nothing useful to do here (can't really go auto) */
2020 if (target_overlay_update
)
2022 if (overlay_cache_invalid
)
2024 overlay_invalidate_all ();
2025 overlay_cache_invalid
= 0;
2027 if (osect
->ovly_mapped
== -1)
2028 (*target_overlay_update
) (osect
);
2030 /* fall thru to manual case */
2031 case 1: /* overlay debugging manual */
2032 return osect
->ovly_mapped
== 1;
2036 /* Function: section_is_mapped
2037 Returns true if section is an overlay, and is currently mapped. */
2040 section_is_mapped (section
)
2043 struct objfile
*objfile
;
2044 struct obj_section
*osect
;
2046 if (overlay_debugging
)
2047 if (section
&& section_is_overlay (section
))
2048 ALL_OBJSECTIONS (objfile
, osect
)
2049 if (osect
->the_bfd_section
== section
)
2050 return overlay_is_mapped (osect
);
2055 /* Function: pc_in_unmapped_range
2056 If PC falls into the lma range of SECTION, return true, else false. */
2059 pc_in_unmapped_range (pc
, section
)
2065 if (overlay_debugging
)
2066 if (section
&& section_is_overlay (section
))
2068 size
= bfd_get_section_size_before_reloc (section
);
2069 if (section
->lma
<= pc
&& pc
< section
->lma
+ size
)
2075 /* Function: pc_in_mapped_range
2076 If PC falls into the vma range of SECTION, return true, else false. */
2079 pc_in_mapped_range (pc
, section
)
2085 if (overlay_debugging
)
2086 if (section
&& section_is_overlay (section
))
2088 size
= bfd_get_section_size_before_reloc (section
);
2089 if (section
->vma
<= pc
&& pc
< section
->vma
+ size
)
2095 /* Function: overlay_unmapped_address (PC, SECTION)
2096 Returns the address corresponding to PC in the unmapped (load) range.
2097 May be the same as PC. */
2100 overlay_unmapped_address (pc
, section
)
2104 if (overlay_debugging
)
2105 if (section
&& section_is_overlay (section
) &&
2106 pc_in_mapped_range (pc
, section
))
2107 return pc
+ section
->lma
- section
->vma
;
2112 /* Function: overlay_mapped_address (PC, SECTION)
2113 Returns the address corresponding to PC in the mapped (runtime) range.
2114 May be the same as PC. */
2117 overlay_mapped_address (pc
, section
)
2121 if (overlay_debugging
)
2122 if (section
&& section_is_overlay (section
) &&
2123 pc_in_unmapped_range (pc
, section
))
2124 return pc
+ section
->vma
- section
->lma
;
2130 /* Function: symbol_overlayed_address
2131 Return one of two addresses (relative to the VMA or to the LMA),
2132 depending on whether the section is mapped or not. */
2135 symbol_overlayed_address (address
, section
)
2139 if (overlay_debugging
)
2141 /* If the symbol has no section, just return its regular address. */
2144 /* If the symbol's section is not an overlay, just return its address */
2145 if (!section_is_overlay (section
))
2147 /* If the symbol's section is mapped, just return its address */
2148 if (section_is_mapped (section
))
2151 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
2152 * then return its LOADED address rather than its vma address!!
2154 return overlay_unmapped_address (address
, section
);
2159 /* Function: find_pc_overlay (PC)
2160 Return the best-match overlay section for PC:
2161 If PC matches a mapped overlay section's VMA, return that section.
2162 Else if PC matches an unmapped section's VMA, return that section.
2163 Else if PC matches an unmapped section's LMA, return that section. */
2166 find_pc_overlay (pc
)
2169 struct objfile
*objfile
;
2170 struct obj_section
*osect
, *best_match
= NULL
;
2172 if (overlay_debugging
)
2173 ALL_OBJSECTIONS (objfile
, osect
)
2174 if (section_is_overlay (osect
->the_bfd_section
))
2176 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
))
2178 if (overlay_is_mapped (osect
))
2179 return osect
->the_bfd_section
;
2183 else if (pc_in_unmapped_range (pc
, osect
->the_bfd_section
))
2186 return best_match
? best_match
->the_bfd_section
: NULL
;
2189 /* Function: find_pc_mapped_section (PC)
2190 If PC falls into the VMA address range of an overlay section that is
2191 currently marked as MAPPED, return that section. Else return NULL. */
2194 find_pc_mapped_section (pc
)
2197 struct objfile
*objfile
;
2198 struct obj_section
*osect
;
2200 if (overlay_debugging
)
2201 ALL_OBJSECTIONS (objfile
, osect
)
2202 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
) &&
2203 overlay_is_mapped (osect
))
2204 return osect
->the_bfd_section
;
2209 /* Function: list_overlays_command
2210 Print a list of mapped sections and their PC ranges */
2213 list_overlays_command (args
, from_tty
)
2218 struct objfile
*objfile
;
2219 struct obj_section
*osect
;
2221 if (overlay_debugging
)
2222 ALL_OBJSECTIONS (objfile
, osect
)
2223 if (overlay_is_mapped (osect
))
2229 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
2230 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
2231 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
2232 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
2233 printf_filtered ("Section %s, loaded at %08x - %08x, ",
2234 name
, lma
, lma
+ size
);
2235 printf_filtered ("mapped at %08x - %08x\n",
2240 printf_filtered ("No sections are mapped.\n");
2243 /* Function: map_overlay_command
2244 Mark the named section as mapped (ie. residing at its VMA address). */
2247 map_overlay_command (args
, from_tty
)
2251 struct objfile
*objfile
, *objfile2
;
2252 struct obj_section
*sec
, *sec2
;
2255 if (!overlay_debugging
)
2256 error ("Overlay debugging not enabled. Use the 'OVERLAY ON' command.");
2258 if (args
== 0 || *args
== 0)
2259 error ("Argument required: name of an overlay section");
2261 /* First, find a section matching the user supplied argument */
2262 ALL_OBJSECTIONS (objfile
, sec
)
2263 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
2265 /* Now, check to see if the section is an overlay. */
2266 bfdsec
= sec
->the_bfd_section
;
2267 if (!section_is_overlay (bfdsec
))
2268 continue; /* not an overlay section */
2270 /* Mark the overlay as "mapped" */
2271 sec
->ovly_mapped
= 1;
2273 /* Next, make a pass and unmap any sections that are
2274 overlapped by this new section: */
2275 ALL_OBJSECTIONS (objfile2
, sec2
)
2276 if (sec2
->ovly_mapped
&&
2278 sec
->the_bfd_section
!= sec2
->the_bfd_section
&&
2279 (pc_in_mapped_range (sec2
->addr
, sec
->the_bfd_section
) ||
2280 pc_in_mapped_range (sec2
->endaddr
, sec
->the_bfd_section
)))
2283 printf_filtered ("Note: section %s unmapped by overlap\n",
2284 bfd_section_name (objfile
->obfd
,
2285 sec2
->the_bfd_section
));
2286 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
2290 error ("No overlay section called %s", args
);
2293 /* Function: unmap_overlay_command
2294 Mark the overlay section as unmapped
2295 (ie. resident in its LMA address range, rather than the VMA range). */
2298 unmap_overlay_command (args
, from_tty
)
2302 struct objfile
*objfile
;
2303 struct obj_section
*sec
;
2305 if (!overlay_debugging
)
2306 error ("Overlay debugging not enabled. Use the 'OVERLAY ON' command.");
2308 if (args
== 0 || *args
== 0)
2309 error ("Argument required: name of an overlay section");
2311 /* First, find a section matching the user supplied argument */
2312 ALL_OBJSECTIONS (objfile
, sec
)
2313 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
2315 if (!sec
->ovly_mapped
)
2316 error ("Section %s is not mapped", args
);
2317 sec
->ovly_mapped
= 0;
2320 error ("No overlay section called %s", args
);
2323 /* Function: overlay_auto_command
2324 A utility command to turn on overlay debugging.
2325 Possibly this should be done via a set/show command. */
2328 overlay_auto_command (args
, from_tty
)
2332 overlay_debugging
= -1;
2334 printf_filtered ("Automatic overlay debugging enabled.");
2337 /* Function: overlay_manual_command
2338 A utility command to turn on overlay debugging.
2339 Possibly this should be done via a set/show command. */
2342 overlay_manual_command (args
, from_tty
)
2346 overlay_debugging
= 1;
2348 printf_filtered ("Overlay debugging enabled.");
2351 /* Function: overlay_off_command
2352 A utility command to turn on overlay debugging.
2353 Possibly this should be done via a set/show command. */
2356 overlay_off_command (args
, from_tty
)
2360 overlay_debugging
= 0;
2362 printf_filtered ("Overlay debugging disabled.");
2366 overlay_load_command (args
, from_tty
)
2370 if (target_overlay_update
)
2371 (*target_overlay_update
) (NULL
);
2373 error ("This target does not know how to read its overlay state.");
2376 /* Function: overlay_command
2377 A place-holder for a mis-typed command */
2379 /* Command list chain containing all defined "overlay" subcommands. */
2380 struct cmd_list_element
*overlaylist
;
2383 overlay_command (args
, from_tty
)
2388 ("\"overlay\" must be followed by the name of an overlay command.\n");
2389 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
2393 /* Target Overlays for the "Simplest" overlay manager:
2395 This is GDB's default target overlay layer. It works with the
2396 minimal overlay manager supplied as an example by Cygnus. The
2397 entry point is via a function pointer "target_overlay_update",
2398 so targets that use a different runtime overlay manager can
2399 substitute their own overlay_update function and take over the
2402 The overlay_update function pokes around in the target's data structures
2403 to see what overlays are mapped, and updates GDB's overlay mapping with
2406 In this simple implementation, the target data structures are as follows:
2407 unsigned _novlys; /# number of overlay sections #/
2408 unsigned _ovly_table[_novlys][4] = {
2409 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
2410 {..., ..., ..., ...},
2412 unsigned _novly_regions; /# number of overlay regions #/
2413 unsigned _ovly_region_table[_novly_regions][3] = {
2414 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
2417 These functions will attempt to update GDB's mappedness state in the
2418 symbol section table, based on the target's mappedness state.
2420 To do this, we keep a cached copy of the target's _ovly_table, and
2421 attempt to detect when the cached copy is invalidated. The main
2422 entry point is "simple_overlay_update(SECT), which looks up SECT in
2423 the cached table and re-reads only the entry for that section from
2424 the target (whenever possible).
2427 /* Cached, dynamically allocated copies of the target data structures: */
2428 static unsigned (*cache_ovly_table
)[4] = 0;
2430 static unsigned (*cache_ovly_region_table
)[3] = 0;
2432 static unsigned cache_novlys
= 0;
2434 static unsigned cache_novly_regions
= 0;
2436 static CORE_ADDR cache_ovly_table_base
= 0;
2438 static CORE_ADDR cache_ovly_region_table_base
= 0;
2440 enum ovly_index
{ VMA
, SIZE
, LMA
, MAPPED
};
2441 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
2443 /* Throw away the cached copy of _ovly_table */
2445 simple_free_overlay_table ()
2447 if (cache_ovly_table
)
2448 free(cache_ovly_table
);
2450 cache_ovly_table
= NULL
;
2451 cache_ovly_table_base
= 0;
2455 /* Throw away the cached copy of _ovly_region_table */
2457 simple_free_overlay_region_table ()
2459 if (cache_ovly_region_table
)
2460 free(cache_ovly_region_table
);
2461 cache_novly_regions
= 0;
2462 cache_ovly_region_table
= NULL
;
2463 cache_ovly_region_table_base
= 0;
2467 /* Read an array of ints from the target into a local buffer.
2468 Convert to host order. int LEN is number of ints */
2470 read_target_long_array (memaddr
, myaddr
, len
)
2472 unsigned int *myaddr
;
2475 char *buf
= alloca (len
* TARGET_LONG_BYTES
);
2478 read_memory (memaddr
, buf
, len
* TARGET_LONG_BYTES
);
2479 for (i
= 0; i
< len
; i
++)
2480 myaddr
[i
] = extract_unsigned_integer (TARGET_LONG_BYTES
* i
+ buf
,
2484 /* Find and grab a copy of the target _ovly_table
2485 (and _novlys, which is needed for the table's size) */
2487 simple_read_overlay_table ()
2489 struct minimal_symbol
*msym
;
2491 simple_free_overlay_table ();
2492 msym
= lookup_minimal_symbol ("_novlys", 0, 0);
2494 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
2496 return 0; /* failure */
2497 cache_ovly_table
= (void *) xmalloc (cache_novlys
* sizeof(*cache_ovly_table
));
2498 if (cache_ovly_table
!= NULL
)
2500 msym
= lookup_minimal_symbol ("_ovly_table", 0, 0);
2503 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
2504 read_target_long_array (cache_ovly_table_base
,
2505 (int *) cache_ovly_table
,
2509 return 0; /* failure */
2512 return 0; /* failure */
2513 return 1; /* SUCCESS */
2517 /* Find and grab a copy of the target _ovly_region_table
2518 (and _novly_regions, which is needed for the table's size) */
2520 simple_read_overlay_region_table ()
2522 struct minimal_symbol
*msym
;
2524 simple_free_overlay_region_table ();
2525 msym
= lookup_minimal_symbol ("_novly_regions", 0, 0);
2527 cache_novly_regions
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
2529 return 0; /* failure */
2530 cache_ovly_region_table
= (void *) xmalloc (cache_novly_regions
* 12);
2531 if (cache_ovly_region_table
!= NULL
)
2533 msym
= lookup_minimal_symbol ("_ovly_region_table", 0, 0);
2536 cache_ovly_region_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
2537 read_target_long_array (cache_ovly_region_table_base
,
2538 (int *) cache_ovly_region_table
,
2539 cache_novly_regions
* 3);
2542 return 0; /* failure */
2545 return 0; /* failure */
2546 return 1; /* SUCCESS */
2550 /* Function: simple_overlay_update_1
2551 A helper function for simple_overlay_update. Assuming a cached copy
2552 of _ovly_table exists, look through it to find an entry whose vma,
2553 lma and size match those of OSECT. Re-read the entry and make sure
2554 it still matches OSECT (else the table may no longer be valid).
2555 Set OSECT's mapped state to match the entry. Return: 1 for
2556 success, 0 for failure. */
2559 simple_overlay_update_1 (osect
)
2560 struct obj_section
*osect
;
2564 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
2565 for (i
= 0; i
< cache_novlys
; i
++)
2566 if (cache_ovly_table
[i
][VMA
] == osect
->the_bfd_section
->vma
&&
2567 cache_ovly_table
[i
][LMA
] == osect
->the_bfd_section
->lma
/* &&
2568 cache_ovly_table[i][SIZE] == size */)
2570 read_target_long_array (cache_ovly_table_base
+ i
* TARGET_LONG_BYTES
,
2571 (int *) cache_ovly_table
[i
], 4);
2572 if (cache_ovly_table
[i
][VMA
] == osect
->the_bfd_section
->vma
&&
2573 cache_ovly_table
[i
][LMA
] == osect
->the_bfd_section
->lma
/* &&
2574 cache_ovly_table[i][SIZE] == size */)
2576 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
2579 else /* Warning! Warning! Target's ovly table has changed! */
2585 /* Function: simple_overlay_update
2586 If OSECT is NULL, then update all sections' mapped state
2587 (after re-reading the entire target _ovly_table).
2588 If OSECT is non-NULL, then try to find a matching entry in the
2589 cached ovly_table and update only OSECT's mapped state.
2590 If a cached entry can't be found or the cache isn't valid, then
2591 re-read the entire cache, and go ahead and update all sections. */
2594 simple_overlay_update (osect
)
2595 struct obj_section
*osect
;
2597 struct objfile
*objfile
;
2599 /* Were we given an osect to look up? NULL means do all of them. */
2601 /* Have we got a cached copy of the target's overlay table? */
2602 if (cache_ovly_table
!= NULL
)
2603 /* Does its cached location match what's currently in the symtab? */
2604 if (cache_ovly_table_base
==
2605 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", 0, 0)))
2606 /* Then go ahead and try to look up this single section in the cache */
2607 if (simple_overlay_update_1 (osect
))
2608 /* Found it! We're done. */
2611 /* Cached table no good: need to read the entire table anew.
2612 Or else we want all the sections, in which case it's actually
2613 more efficient to read the whole table in one block anyway. */
2615 if (simple_read_overlay_table () == 0) /* read failed? No table? */
2617 warning ("Failed to read the target overlay mapping table.");
2620 /* Now may as well update all sections, even if only one was requested. */
2621 ALL_OBJSECTIONS (objfile
, osect
)
2622 if (section_is_overlay (osect
->the_bfd_section
))
2626 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
2627 for (i
= 0; i
< cache_novlys
; i
++)
2628 if (cache_ovly_table
[i
][VMA
] == osect
->the_bfd_section
->vma
&&
2629 cache_ovly_table
[i
][LMA
] == osect
->the_bfd_section
->lma
/* &&
2630 cache_ovly_table[i][SIZE] == size */)
2631 { /* obj_section matches i'th entry in ovly_table */
2632 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
2633 break; /* finished with inner for loop: break out */
2640 _initialize_symfile ()
2642 struct cmd_list_element
*c
;
2644 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
,
2645 "Load symbol table from executable file FILE.\n\
2646 The `file' command can also load symbol tables, as well as setting the file\n\
2647 to execute.", &cmdlist
);
2648 c
->completer
= filename_completer
;
2650 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
,
2651 "Usage: add-symbol-file FILE ADDR\n\
2652 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
2653 ADDR is the starting address of the file's text.",
2655 c
->completer
= filename_completer
;
2657 c
= add_cmd ("add-shared-symbol-files", class_files
,
2658 add_shared_symbol_files_command
,
2659 "Load the symbols from shared objects in the dynamic linker's link map.",
2661 c
= add_alias_cmd ("assf", "add-shared-symbol-files", class_files
, 1,
2664 c
= add_cmd ("load", class_files
, load_command
,
2665 "Dynamically load FILE into the running program, and record its symbols\n\
2666 for access from GDB.", &cmdlist
);
2667 c
->completer
= filename_completer
;
2670 (add_set_cmd ("symbol-reloading", class_support
, var_boolean
,
2671 (char *)&symbol_reloading
,
2672 "Set dynamic symbol table reloading multiple times in one run.",
2676 add_prefix_cmd ("overlay", class_support
, overlay_command
,
2677 "Commands for debugging overlays.", &overlaylist
,
2678 "overlay ", 0, &cmdlist
);
2680 add_com_alias ("ovly", "overlay", class_alias
, 1);
2681 add_com_alias ("ov", "overlay", class_alias
, 1);
2683 add_cmd ("map-overlay", class_support
, map_overlay_command
,
2684 "Assert that an overlay section is mapped.", &overlaylist
);
2686 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
2687 "Assert that an overlay section is unmapped.", &overlaylist
);
2689 add_cmd ("list-overlays", class_support
, list_overlays_command
,
2690 "List mappings of overlay sections.", &overlaylist
);
2692 add_cmd ("manual", class_support
, overlay_manual_command
,
2693 "Enable overlay debugging.", &overlaylist
);
2694 add_cmd ("off", class_support
, overlay_off_command
,
2695 "Disable overlay debugging.", &overlaylist
);
2696 add_cmd ("auto", class_support
, overlay_auto_command
,
2697 "Enable automatic overlay debugging.", &overlaylist
);
2698 add_cmd ("load-target", class_support
, overlay_load_command
,
2699 "Read the overlay mapping state from the target.", &overlaylist
);