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 (from_tty || info_verbose)
661 if (pre_add_symbol_hook)
662 pre_add_symbol_hook (name);
665 printf_filtered ("Reading symbols from %s...", name);
667 gdb_flush (gdb_stdout);
670 syms_from_objfile (objfile, addr, mainline, from_tty);
673 /* We now have at least a partial symbol table. Check to see if the
674 user requested that all symbols be read on initial access via either
675 the gdb startup command line or on a per symbol file basis. Expand
676 all partial symbol tables for this objfile if so. */
678 if (readnow || readnow_symbol_files)
680 if (from_tty || info_verbose)
682 printf_filtered ("expanding to full symbols...");
684 gdb_flush (gdb_stdout);
687 for (psymtab = objfile -> psymtabs;
689 psymtab = psymtab -> next)
691 psymtab_to_symtab (psymtab);
695 if (from_tty || info_verbose)
697 if (post_add_symbol_hook)
698 post_add_symbol_hook ();
701 printf_filtered ("done.\n");
702 gdb_flush (gdb_stdout);
706 new_symfile_objfile (objfile, mainline, from_tty);
708 target_new_objfile (objfile);
713 /* This is the symbol-file command. Read the file, analyze its
714 symbols, and add a struct symtab to a symtab list. The syntax of
715 the command is rather bizarre--(1) buildargv implements various
716 quoting conventions which are undocumented and have little or
717 nothing in common with the way things are quoted (or not quoted)
718 elsewhere in GDB, (2) options are used, which are not generally
719 used in GDB (perhaps "set mapped on", "set readnow on" would be
720 better), (3) the order of options matters, which is contrary to GNU
721 conventions (because it is confusing and inconvenient). */
724 symbol_file_command (args, from_tty)
730 CORE_ADDR text_relocation = 0; /* text_relocation */
731 struct cleanup *cleanups;
739 if ((have_full_symbols () || have_partial_symbols ())
741 && !query ("Discard symbol table from `%s'? ",
742 symfile_objfile -> name))
743 error ("Not confirmed.");
744 free_all_objfiles ();
745 symfile_objfile = NULL;
748 printf_unfiltered ("No symbol file now.\n");
753 if ((argv = buildargv (args)) == NULL)
757 cleanups = make_cleanup (freeargv, (char *) argv);
758 while (*argv != NULL)
760 if (STREQ (*argv, "-mapped"))
764 else if (STREQ (*argv, "-readnow"))
768 else if (**argv == '-')
770 error ("unknown option `%s'", *argv);
778 /* this is for rombug remote only, to get the text relocation by
779 using link command */
780 p = strrchr(name, '/');
784 target_link(p, &text_relocation);
786 if (text_relocation == (CORE_ADDR)0)
788 else if (text_relocation == (CORE_ADDR)-1)
789 symbol_file_add (name, from_tty, (CORE_ADDR)0, 1, mapped,
792 symbol_file_add (name, from_tty, (CORE_ADDR)text_relocation,
795 /* Getting new symbols may change our opinion about what is
797 reinit_frame_cache ();
799 set_initial_language ();
806 error ("no symbol file name was specified");
808 do_cleanups (cleanups);
812 /* Set the initial language.
814 A better solution would be to record the language in the psymtab when reading
815 partial symbols, and then use it (if known) to set the language. This would
816 be a win for formats that encode the language in an easily discoverable place,
817 such as DWARF. For stabs, we can jump through hoops looking for specially
818 named symbols or try to intuit the language from the specific type of stabs
819 we find, but we can't do that until later when we read in full symbols.
823 set_initial_language ()
825 struct partial_symtab *pst;
826 enum language lang = language_unknown;
828 pst = find_main_psymtab ();
831 if (pst -> filename != NULL)
833 lang = deduce_language_from_filename (pst -> filename);
835 if (lang == language_unknown)
837 /* Make C the default language */
841 expected_language = current_language; /* Don't warn the user */
845 /* Open file specified by NAME and hand it off to BFD for preliminary
846 analysis. Result is a newly initialized bfd *, which includes a newly
847 malloc'd` copy of NAME (tilde-expanded and made absolute).
848 In case of trouble, error() is called. */
851 symfile_bfd_open (name)
858 name = tilde_expand (name); /* Returns 1st new malloc'd copy */
860 /* Look down path for it, allocate 2nd new malloc'd copy. */
861 desc = openp (getenv ("PATH"), 1, name, O_RDONLY | O_BINARY, 0, &absolute_name);
862 #if defined(__GO32__) || defined(_WIN32)
865 char *exename = alloca (strlen (name) + 5);
866 strcat (strcpy (exename, name), ".exe");
867 desc = openp (getenv ("PATH"), 1, exename, O_RDONLY | O_BINARY,
873 make_cleanup (free, name);
874 perror_with_name (name);
876 free (name); /* Free 1st new malloc'd copy */
877 name = absolute_name; /* Keep 2nd malloc'd copy in bfd */
878 /* It'll be freed in free_objfile(). */
880 sym_bfd = bfd_fdopenr (name, gnutarget, desc);
884 make_cleanup (free, name);
885 error ("\"%s\": can't open to read symbols: %s.", name,
886 bfd_errmsg (bfd_get_error ()));
888 sym_bfd->cacheable = true;
890 if (!bfd_check_format (sym_bfd, bfd_object))
892 /* FIXME: should be checking for errors from bfd_close (for one thing,
893 on error it does not free all the storage associated with the
895 bfd_close (sym_bfd); /* This also closes desc */
896 make_cleanup (free, name);
897 error ("\"%s\": can't read symbols: %s.", name,
898 bfd_errmsg (bfd_get_error ()));
904 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
905 startup by the _initialize routine in each object file format reader,
906 to register information about each format the the reader is prepared
913 sf->next = symtab_fns;
918 /* Initialize to read symbols from the symbol file sym_bfd. It either
919 returns or calls error(). The result is an initialized struct sym_fns
920 in the objfile structure, that contains cached information about the
924 find_sym_fns (objfile)
925 struct objfile *objfile;
928 enum bfd_flavour our_flavour = bfd_get_flavour (objfile -> obfd);
929 char *our_target = bfd_get_target (objfile -> obfd);
931 /* Special kludge for RS/6000 and PowerMac. See xcoffread.c. */
932 if (STREQ (our_target, "aixcoff-rs6000") ||
933 STREQ (our_target, "xcoff-powermac"))
934 our_flavour = (enum bfd_flavour)-1;
936 /* Special kludge for apollo. See dstread.c. */
937 if (STREQN (our_target, "apollo", 6))
938 our_flavour = (enum bfd_flavour)-2;
940 for (sf = symtab_fns; sf != NULL; sf = sf -> next)
942 if (our_flavour == sf -> sym_flavour)
948 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
949 bfd_get_target (objfile -> obfd));
952 /* This function runs the load command of our current target. */
955 load_command (arg, from_tty)
960 arg = get_exec_file (1);
961 target_load (arg, from_tty);
964 /* This version of "load" should be usable for any target. Currently
965 it is just used for remote targets, not inftarg.c or core files,
966 on the theory that only in that case is it useful.
968 Avoiding xmodem and the like seems like a win (a) because we don't have
969 to worry about finding it, and (b) On VMS, fork() is very slow and so
970 we don't want to run a subprocess. On the other hand, I'm not sure how
971 performance compares. */
972 #define GENERIC_LOAD_CHUNK 256
973 #define VALIDATE_DOWNLOAD 0
975 generic_load (filename, from_tty)
979 struct cleanup *old_cleanups;
982 time_t start_time, end_time; /* Start and end times of download */
983 unsigned long data_count = 0; /* Number of bytes transferred to memory */
985 unsigned long load_offset = 0; /* offset to add to vma for each section */
986 char buf[GENERIC_LOAD_CHUNK+8];
987 #if VALIDATE_DOWNLOAD
988 char verify_buffer[GENERIC_LOAD_CHUNK+8] ;
991 /* enable user to specify address for downloading as 2nd arg to load */
992 n = sscanf(filename, "%s 0x%lx", buf, &load_offset);
998 loadfile_bfd = bfd_openr (filename, gnutarget);
999 if (loadfile_bfd == NULL)
1001 perror_with_name (filename);
1004 /* FIXME: should be checking for errors from bfd_close (for one thing,
1005 on error it does not free all the storage associated with the
1007 old_cleanups = make_cleanup (bfd_close, loadfile_bfd);
1009 if (!bfd_check_format (loadfile_bfd, bfd_object))
1011 error ("\"%s\" is not an object file: %s", filename,
1012 bfd_errmsg (bfd_get_error ()));
1015 start_time = time (NULL);
1017 for (s = loadfile_bfd->sections; s; s = s->next)
1019 if (s->flags & SEC_LOAD)
1023 size = bfd_get_section_size_before_reloc (s);
1027 struct cleanup *old_chain;
1029 unsigned long l = size ;
1035 l = l > GENERIC_LOAD_CHUNK ? GENERIC_LOAD_CHUNK : l ;
1037 buffer = xmalloc (size);
1038 old_chain = make_cleanup (free, buffer);
1043 /* Is this really necessary? I guess it gives the user something
1044 to look at during a long download. */
1045 printf_filtered ("Loading section %s, size 0x%lx lma ",
1046 bfd_get_section_name (loadfile_bfd, s),
1047 (unsigned long) size);
1048 print_address_numeric (lma, 1, gdb_stdout);
1049 printf_filtered ("\n");
1051 bfd_get_section_contents (loadfile_bfd, s, buffer, 0, size);
1053 sect = (char *) bfd_get_section_name (loadfile_bfd, s);
1057 len = (size - sent) < l ? (size - sent) : l;
1059 err = target_write_memory (lma, buffer, len);
1060 if (ui_load_progress_hook)
1061 if (ui_load_progress_hook (sect, sent))
1062 error ("Canceled the download");
1063 #if VALIDATE_DOWNLOAD
1064 /* Broken memories and broken monitors manifest themselves
1065 here when bring new computers to life.
1066 This doubles already slow downloads.
1070 target_read_memory(lma,verify_buffer,len) ;
1071 if (0 != bcmp(buffer,verify_buffer,len))
1072 error("Download verify failed at %08x",
1073 (unsigned long)lma) ;
1081 while (err == 0 && sent < size);
1084 error ("Memory access error while loading section %s.",
1085 bfd_get_section_name (loadfile_bfd, s));
1087 do_cleanups (old_chain);
1092 end_time = time (NULL);
1094 unsigned long entry ;
1095 entry = bfd_get_start_address(loadfile_bfd) ;
1096 printf_filtered ("Start address 0x%lx , load size %d\n", entry,data_count);
1097 /* We were doing this in remote-mips.c, I suspect it is right
1098 for other targets too. */
1102 /* FIXME: are we supposed to call symbol_file_add or not? According to
1103 a comment from remote-mips.c (where a call to symbol_file_add was
1104 commented out), making the call confuses GDB if more than one file is
1105 loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c
1108 report_transfer_performance (data_count, start_time, end_time);
1110 do_cleanups (old_cleanups);
1113 /* Report how fast the transfer went. */
1116 report_transfer_performance (data_count, start_time, end_time)
1117 unsigned long data_count;
1118 time_t start_time, end_time;
1120 printf_filtered ("Transfer rate: ");
1121 if (end_time != start_time)
1122 printf_filtered ("%d bits/sec",
1123 (data_count * 8) / (end_time - start_time));
1125 printf_filtered ("%d bits in <1 sec", (data_count * 8));
1126 printf_filtered (".\n");
1129 /* This function allows the addition of incrementally linked object files.
1130 It does not modify any state in the target, only in the debugger. */
1134 add_symbol_file_command (args, from_tty)
1139 CORE_ADDR text_addr;
1148 error ("add-symbol-file takes a file name and an address");
1151 /* Make a copy of the string that we can safely write into. */
1153 args = strdup (args);
1154 make_cleanup (free, args);
1156 /* Pick off any -option args and the file name. */
1158 while ((*args != '\000') && (name == NULL))
1160 while (isspace (*args)) {args++;}
1162 while ((*args != '\000') && !isspace (*args)) {args++;}
1163 if (*args != '\000')
1171 else if (STREQ (arg, "-mapped"))
1175 else if (STREQ (arg, "-readnow"))
1181 error ("unknown option `%s'", arg);
1185 /* After picking off any options and the file name, args should be
1186 left pointing at the remainder of the command line, which should
1187 be the address expression to evaluate. */
1191 error ("add-symbol-file takes a file name");
1193 name = tilde_expand (name);
1194 make_cleanup (free, name);
1196 if (*args != '\000')
1198 text_addr = parse_and_eval_address (args);
1202 target_link(name, &text_addr);
1203 if (text_addr == (CORE_ADDR)-1)
1204 error("Don't know how to get text start location for this file");
1207 /* FIXME-32x64: Assumes text_addr fits in a long. */
1208 if (!query ("add symbol table from file \"%s\" at text_addr = %s?\n",
1209 name, local_hex_string ((unsigned long)text_addr)))
1210 error ("Not confirmed.");
1212 symbol_file_add (name, 0, text_addr, 0, mapped, readnow);
1214 /* Getting new symbols may change our opinion about what is
1216 reinit_frame_cache ();
1220 add_shared_symbol_files_command (args, from_tty)
1224 #ifdef ADD_SHARED_SYMBOL_FILES
1225 ADD_SHARED_SYMBOL_FILES (args, from_tty);
1227 error ("This command is not available in this configuration of GDB.");
1231 /* Re-read symbols if a symbol-file has changed. */
1235 struct objfile *objfile;
1238 struct stat new_statbuf;
1241 /* With the addition of shared libraries, this should be modified,
1242 the load time should be saved in the partial symbol tables, since
1243 different tables may come from different source files. FIXME.
1244 This routine should then walk down each partial symbol table
1245 and see if the symbol table that it originates from has been changed */
1247 for (objfile = object_files; objfile; objfile = objfile->next) {
1248 if (objfile->obfd) {
1249 #ifdef IBM6000_TARGET
1250 /* If this object is from a shared library, then you should
1251 stat on the library name, not member name. */
1253 if (objfile->obfd->my_archive)
1254 res = stat (objfile->obfd->my_archive->filename, &new_statbuf);
1257 res = stat (objfile->name, &new_statbuf);
1259 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1260 printf_filtered ("`%s' has disappeared; keeping its symbols.\n",
1264 new_modtime = new_statbuf.st_mtime;
1265 if (new_modtime != objfile->mtime)
1267 struct cleanup *old_cleanups;
1268 struct section_offsets *offsets;
1270 int section_offsets_size;
1271 char *obfd_filename;
1273 printf_filtered ("`%s' has changed; re-reading symbols.\n",
1276 /* There are various functions like symbol_file_add,
1277 symfile_bfd_open, syms_from_objfile, etc., which might
1278 appear to do what we want. But they have various other
1279 effects which we *don't* want. So we just do stuff
1280 ourselves. We don't worry about mapped files (for one thing,
1281 any mapped file will be out of date). */
1283 /* If we get an error, blow away this objfile (not sure if
1284 that is the correct response for things like shared
1286 old_cleanups = make_cleanup (free_objfile, objfile);
1287 /* We need to do this whenever any symbols go away. */
1288 make_cleanup (clear_symtab_users, 0);
1290 /* Clean up any state BFD has sitting around. We don't need
1291 to close the descriptor but BFD lacks a way of closing the
1292 BFD without closing the descriptor. */
1293 obfd_filename = bfd_get_filename (objfile->obfd);
1294 if (!bfd_close (objfile->obfd))
1295 error ("Can't close BFD for %s: %s", objfile->name,
1296 bfd_errmsg (bfd_get_error ()));
1297 objfile->obfd = bfd_openr (obfd_filename, gnutarget);
1298 if (objfile->obfd == NULL)
1299 error ("Can't open %s to read symbols.", objfile->name);
1300 /* bfd_openr sets cacheable to true, which is what we want. */
1301 if (!bfd_check_format (objfile->obfd, bfd_object))
1302 error ("Can't read symbols from %s: %s.", objfile->name,
1303 bfd_errmsg (bfd_get_error ()));
1305 /* Save the offsets, we will nuke them with the rest of the
1307 num_offsets = objfile->num_sections;
1308 section_offsets_size =
1309 sizeof (struct section_offsets)
1310 + sizeof (objfile->section_offsets->offsets) * num_offsets;
1311 offsets = (struct section_offsets *) alloca (section_offsets_size);
1312 memcpy (offsets, objfile->section_offsets, section_offsets_size);
1314 /* Nuke all the state that we will re-read. Much of the following
1315 code which sets things to NULL really is necessary to tell
1316 other parts of GDB that there is nothing currently there. */
1318 /* FIXME: Do we have to free a whole linked list, or is this
1320 if (objfile->global_psymbols.list)
1321 mfree (objfile->md, objfile->global_psymbols.list);
1322 memset (&objfile -> global_psymbols, 0,
1323 sizeof (objfile -> global_psymbols));
1324 if (objfile->static_psymbols.list)
1325 mfree (objfile->md, objfile->static_psymbols.list);
1326 memset (&objfile -> static_psymbols, 0,
1327 sizeof (objfile -> static_psymbols));
1329 /* Free the obstacks for non-reusable objfiles */
1330 obstack_free (&objfile -> psymbol_cache.cache, 0);
1331 memset (&objfile -> psymbol_cache, 0,
1332 sizeof (objfile -> psymbol_cache));
1333 obstack_free (&objfile -> psymbol_obstack, 0);
1334 obstack_free (&objfile -> symbol_obstack, 0);
1335 obstack_free (&objfile -> type_obstack, 0);
1336 objfile->sections = NULL;
1337 objfile->symtabs = NULL;
1338 objfile->psymtabs = NULL;
1339 objfile->free_psymtabs = NULL;
1340 objfile->msymbols = NULL;
1341 objfile->minimal_symbol_count= 0;
1342 objfile->fundamental_types = NULL;
1343 if (objfile -> sf != NULL)
1345 (*objfile -> sf -> sym_finish) (objfile);
1348 /* We never make this a mapped file. */
1349 objfile -> md = NULL;
1350 /* obstack_specify_allocation also initializes the obstack so
1352 obstack_specify_allocation (&objfile -> psymbol_cache.cache, 0, 0,
1354 obstack_specify_allocation (&objfile -> psymbol_obstack, 0, 0,
1356 obstack_specify_allocation (&objfile -> symbol_obstack, 0, 0,
1358 obstack_specify_allocation (&objfile -> type_obstack, 0, 0,
1360 if (build_objfile_section_table (objfile))
1362 error ("Can't find the file sections in `%s': %s",
1363 objfile -> name, bfd_errmsg (bfd_get_error ()));
1366 /* We use the same section offsets as from last time. I'm not
1367 sure whether that is always correct for shared libraries. */
1368 objfile->section_offsets = (struct section_offsets *)
1369 obstack_alloc (&objfile -> psymbol_obstack, section_offsets_size);
1370 memcpy (objfile->section_offsets, offsets, section_offsets_size);
1371 objfile->num_sections = num_offsets;
1373 /* What the hell is sym_new_init for, anyway? The concept of
1374 distinguishing between the main file and additional files
1375 in this way seems rather dubious. */
1376 if (objfile == symfile_objfile)
1377 (*objfile->sf->sym_new_init) (objfile);
1379 (*objfile->sf->sym_init) (objfile);
1380 clear_complaints (1, 1);
1381 /* The "mainline" parameter is a hideous hack; I think leaving it
1382 zero is OK since dbxread.c also does what it needs to do if
1383 objfile->global_psymbols.size is 0. */
1384 (*objfile->sf->sym_read) (objfile, objfile->section_offsets, 0);
1385 if (!have_partial_symbols () && !have_full_symbols ())
1388 printf_filtered ("(no debugging symbols found)\n");
1391 objfile -> flags |= OBJF_SYMS;
1393 /* We're done reading the symbol file; finish off complaints. */
1394 clear_complaints (0, 1);
1396 /* Getting new symbols may change our opinion about what is
1399 reinit_frame_cache ();
1401 /* Discard cleanups as symbol reading was successful. */
1402 discard_cleanups (old_cleanups);
1404 /* If the mtime has changed between the time we set new_modtime
1405 and now, we *want* this to be out of date, so don't call stat
1407 objfile->mtime = new_modtime;
1410 /* Call this after reading in a new symbol table to give target
1411 dependant code a crack at the new symbols. For instance, this
1412 could be used to update the values of target-specific symbols GDB
1413 needs to keep track of (such as _sigtramp, or whatever). */
1415 TARGET_SYMFILE_POSTREAD (objfile);
1421 clear_symtab_users ();
1426 deduce_language_from_filename (filename)
1433 else if (0 == (c = strrchr (filename, '.')))
1434 ; /* Get default. */
1435 else if (STREQ (c, ".c"))
1437 else if (STREQ (c, ".cc") || STREQ (c, ".C") || STREQ (c, ".cxx")
1438 || STREQ (c, ".cpp") || STREQ (c, ".cp") || STREQ (c, ".c++"))
1439 return language_cplus;
1440 else if (STREQ (c, ".java"))
1441 return language_java;
1442 else if (STREQ (c, ".ch") || STREQ (c, ".c186") || STREQ (c, ".c286"))
1443 return language_chill;
1444 else if (STREQ (c, ".f") || STREQ (c, ".F"))
1445 return language_fortran;
1446 else if (STREQ (c, ".mod"))
1448 else if (STREQ (c, ".s") || STREQ (c, ".S"))
1449 return language_asm;
1451 return language_unknown; /* default */
1456 Allocate and partly initialize a new symbol table. Return a pointer
1457 to it. error() if no space.
1459 Caller must set these fields:
1465 initialize any EXTRA_SYMTAB_INFO
1466 possibly free_named_symtabs (symtab->filename);
1470 allocate_symtab (filename, objfile)
1472 struct objfile *objfile;
1474 register struct symtab *symtab;
1476 symtab = (struct symtab *)
1477 obstack_alloc (&objfile -> symbol_obstack, sizeof (struct symtab));
1478 memset (symtab, 0, sizeof (*symtab));
1479 symtab -> filename = obsavestring (filename, strlen (filename),
1480 &objfile -> symbol_obstack);
1481 symtab -> fullname = NULL;
1482 symtab -> language = deduce_language_from_filename (filename);
1483 symtab -> debugformat = obsavestring ("unknown", 7,
1484 &objfile -> symbol_obstack);
1486 /* Hook it to the objfile it comes from */
1488 symtab -> objfile = objfile;
1489 symtab -> next = objfile -> symtabs;
1490 objfile -> symtabs = symtab;
1492 #ifdef INIT_EXTRA_SYMTAB_INFO
1493 INIT_EXTRA_SYMTAB_INFO (symtab);
1499 struct partial_symtab *
1500 allocate_psymtab (filename, objfile)
1502 struct objfile *objfile;
1504 struct partial_symtab *psymtab;
1506 if (objfile -> free_psymtabs)
1508 psymtab = objfile -> free_psymtabs;
1509 objfile -> free_psymtabs = psymtab -> next;
1512 psymtab = (struct partial_symtab *)
1513 obstack_alloc (&objfile -> psymbol_obstack,
1514 sizeof (struct partial_symtab));
1516 memset (psymtab, 0, sizeof (struct partial_symtab));
1517 psymtab -> filename = obsavestring (filename, strlen (filename),
1518 &objfile -> psymbol_obstack);
1519 psymtab -> symtab = NULL;
1521 /* Prepend it to the psymtab list for the objfile it belongs to.
1522 Psymtabs are searched in most recent inserted -> least recent
1525 psymtab -> objfile = objfile;
1526 psymtab -> next = objfile -> psymtabs;
1527 objfile -> psymtabs = psymtab;
1530 struct partial_symtab **prev_pst;
1531 psymtab -> objfile = objfile;
1532 psymtab -> next = NULL;
1533 prev_pst = &(objfile -> psymtabs);
1534 while ((*prev_pst) != NULL)
1535 prev_pst = &((*prev_pst) -> next);
1536 (*prev_pst) = psymtab;
1544 discard_psymtab (pst)
1545 struct partial_symtab *pst;
1547 struct partial_symtab **prev_pst;
1550 Empty psymtabs happen as a result of header files which don't
1551 have any symbols in them. There can be a lot of them. But this
1552 check is wrong, in that a psymtab with N_SLINE entries but
1553 nothing else is not empty, but we don't realize that. Fixing
1554 that without slowing things down might be tricky. */
1556 /* First, snip it out of the psymtab chain */
1558 prev_pst = &(pst->objfile->psymtabs);
1559 while ((*prev_pst) != pst)
1560 prev_pst = &((*prev_pst)->next);
1561 (*prev_pst) = pst->next;
1563 /* Next, put it on a free list for recycling */
1565 pst->next = pst->objfile->free_psymtabs;
1566 pst->objfile->free_psymtabs = pst;
1570 /* Reset all data structures in gdb which may contain references to symbol
1574 clear_symtab_users ()
1576 /* Someday, we should do better than this, by only blowing away
1577 the things that really need to be blown. */
1578 clear_value_history ();
1580 clear_internalvars ();
1581 breakpoint_re_set ();
1582 set_default_breakpoint (0, 0, 0, 0);
1583 current_source_symtab = 0;
1584 current_source_line = 0;
1585 clear_pc_function_cache ();
1586 target_new_objfile (NULL);
1589 /* clear_symtab_users_once:
1591 This function is run after symbol reading, or from a cleanup.
1592 If an old symbol table was obsoleted, the old symbol table
1593 has been blown away, but the other GDB data structures that may
1594 reference it have not yet been cleared or re-directed. (The old
1595 symtab was zapped, and the cleanup queued, in free_named_symtab()
1598 This function can be queued N times as a cleanup, or called
1599 directly; it will do all the work the first time, and then will be a
1600 no-op until the next time it is queued. This works by bumping a
1601 counter at queueing time. Much later when the cleanup is run, or at
1602 the end of symbol processing (in case the cleanup is discarded), if
1603 the queued count is greater than the "done-count", we do the work
1604 and set the done-count to the queued count. If the queued count is
1605 less than or equal to the done-count, we just ignore the call. This
1606 is needed because reading a single .o file will often replace many
1607 symtabs (one per .h file, for example), and we don't want to reset
1608 the breakpoints N times in the user's face.
1610 The reason we both queue a cleanup, and call it directly after symbol
1611 reading, is because the cleanup protects us in case of errors, but is
1612 discarded if symbol reading is successful. */
1615 /* FIXME: As free_named_symtabs is currently a big noop this function
1616 is no longer needed. */
1618 clear_symtab_users_once PARAMS ((void));
1620 static int clear_symtab_users_queued;
1621 static int clear_symtab_users_done;
1624 clear_symtab_users_once ()
1626 /* Enforce once-per-`do_cleanups'-semantics */
1627 if (clear_symtab_users_queued <= clear_symtab_users_done)
1629 clear_symtab_users_done = clear_symtab_users_queued;
1631 clear_symtab_users ();
1635 /* Delete the specified psymtab, and any others that reference it. */
1638 cashier_psymtab (pst)
1639 struct partial_symtab *pst;
1641 struct partial_symtab *ps, *pprev = NULL;
1644 /* Find its previous psymtab in the chain */
1645 for (ps = pst->objfile->psymtabs; ps; ps = ps->next) {
1652 /* Unhook it from the chain. */
1653 if (ps == pst->objfile->psymtabs)
1654 pst->objfile->psymtabs = ps->next;
1656 pprev->next = ps->next;
1658 /* FIXME, we can't conveniently deallocate the entries in the
1659 partial_symbol lists (global_psymbols/static_psymbols) that
1660 this psymtab points to. These just take up space until all
1661 the psymtabs are reclaimed. Ditto the dependencies list and
1662 filename, which are all in the psymbol_obstack. */
1664 /* We need to cashier any psymtab that has this one as a dependency... */
1666 for (ps = pst->objfile->psymtabs; ps; ps = ps->next) {
1667 for (i = 0; i < ps->number_of_dependencies; i++) {
1668 if (ps->dependencies[i] == pst) {
1669 cashier_psymtab (ps);
1670 goto again; /* Must restart, chain has been munged. */
1677 /* If a symtab or psymtab for filename NAME is found, free it along
1678 with any dependent breakpoints, displays, etc.
1679 Used when loading new versions of object modules with the "add-file"
1680 command. This is only called on the top-level symtab or psymtab's name;
1681 it is not called for subsidiary files such as .h files.
1683 Return value is 1 if we blew away the environment, 0 if not.
1684 FIXME. The return valu appears to never be used.
1686 FIXME. I think this is not the best way to do this. We should
1687 work on being gentler to the environment while still cleaning up
1688 all stray pointers into the freed symtab. */
1691 free_named_symtabs (name)
1695 /* FIXME: With the new method of each objfile having it's own
1696 psymtab list, this function needs serious rethinking. In particular,
1697 why was it ever necessary to toss psymtabs with specific compilation
1698 unit filenames, as opposed to all psymtabs from a particular symbol
1700 Well, the answer is that some systems permit reloading of particular
1701 compilation units. We want to blow away any old info about these
1702 compilation units, regardless of which objfiles they arrived in. --gnu. */
1704 register struct symtab *s;
1705 register struct symtab *prev;
1706 register struct partial_symtab *ps;
1707 struct blockvector *bv;
1710 /* We only wack things if the symbol-reload switch is set. */
1711 if (!symbol_reloading)
1714 /* Some symbol formats have trouble providing file names... */
1715 if (name == 0 || *name == '\0')
1718 /* Look for a psymtab with the specified name. */
1721 for (ps = partial_symtab_list; ps; ps = ps->next) {
1722 if (STREQ (name, ps->filename)) {
1723 cashier_psymtab (ps); /* Blow it away...and its little dog, too. */
1724 goto again2; /* Must restart, chain has been munged */
1728 /* Look for a symtab with the specified name. */
1730 for (s = symtab_list; s; s = s->next)
1732 if (STREQ (name, s->filename))
1739 if (s == symtab_list)
1740 symtab_list = s->next;
1742 prev->next = s->next;
1744 /* For now, queue a delete for all breakpoints, displays, etc., whether
1745 or not they depend on the symtab being freed. This should be
1746 changed so that only those data structures affected are deleted. */
1748 /* But don't delete anything if the symtab is empty.
1749 This test is necessary due to a bug in "dbxread.c" that
1750 causes empty symtabs to be created for N_SO symbols that
1751 contain the pathname of the object file. (This problem
1752 has been fixed in GDB 3.9x). */
1754 bv = BLOCKVECTOR (s);
1755 if (BLOCKVECTOR_NBLOCKS (bv) > 2
1756 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK))
1757 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)))
1759 complain (&oldsyms_complaint, name);
1761 clear_symtab_users_queued++;
1762 make_cleanup (clear_symtab_users_once, 0);
1765 complain (&empty_symtab_complaint, name);
1772 /* It is still possible that some breakpoints will be affected
1773 even though no symtab was found, since the file might have
1774 been compiled without debugging, and hence not be associated
1775 with a symtab. In order to handle this correctly, we would need
1776 to keep a list of text address ranges for undebuggable files.
1777 For now, we do nothing, since this is a fairly obscure case. */
1781 /* FIXME, what about the minimal symbol table? */
1788 /* Allocate and partially fill a partial symtab. It will be
1789 completely filled at the end of the symbol list.
1791 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
1792 is the address relative to which its symbols are (incremental) or 0
1796 struct partial_symtab *
1797 start_psymtab_common (objfile, section_offsets,
1798 filename, textlow, global_syms, static_syms)
1799 struct objfile *objfile;
1800 struct section_offsets *section_offsets;
1803 struct partial_symbol **global_syms;
1804 struct partial_symbol **static_syms;
1806 struct partial_symtab *psymtab;
1808 psymtab = allocate_psymtab (filename, objfile);
1809 psymtab -> section_offsets = section_offsets;
1810 psymtab -> textlow = textlow;
1811 psymtab -> texthigh = psymtab -> textlow; /* default */
1812 psymtab -> globals_offset = global_syms - objfile -> global_psymbols.list;
1813 psymtab -> statics_offset = static_syms - objfile -> static_psymbols.list;
1817 /* Add a symbol with a long value to a psymtab.
1818 Since one arg is a struct, we pass in a ptr and deref it (sigh). */
1821 add_psymbol_to_list (name, namelength, namespace, class, list, val, coreaddr,
1825 namespace_enum namespace;
1826 enum address_class class;
1827 struct psymbol_allocation_list *list;
1828 long val; /* Value as a long */
1829 CORE_ADDR coreaddr; /* Value as a CORE_ADDR */
1830 enum language language;
1831 struct objfile *objfile;
1833 register struct partial_symbol *psym;
1834 char *buf = alloca (namelength + 1);
1835 /* psymbol is static so that there will be no uninitialized gaps in the
1836 structure which might contain random data, causing cache misses in
1838 static struct partial_symbol psymbol;
1840 /* Create local copy of the partial symbol */
1841 memcpy (buf, name, namelength);
1842 buf[namelength] = '\0';
1843 SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, &objfile->psymbol_cache);
1844 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
1847 SYMBOL_VALUE (&psymbol) = val;
1851 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
1853 SYMBOL_SECTION (&psymbol) = 0;
1854 SYMBOL_LANGUAGE (&psymbol) = language;
1855 PSYMBOL_NAMESPACE (&psymbol) = namespace;
1856 PSYMBOL_CLASS (&psymbol) = class;
1857 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language);
1859 /* Stash the partial symbol away in the cache */
1860 psym = bcache (&psymbol, sizeof (struct partial_symbol), &objfile->psymbol_cache);
1862 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
1863 if (list->next >= list->list + list->size)
1865 extend_psymbol_list (list, objfile);
1867 *list->next++ = psym;
1868 OBJSTAT (objfile, n_psyms++);
1871 /* Initialize storage for partial symbols. */
1874 init_psymbol_list (objfile, total_symbols)
1875 struct objfile *objfile;
1878 /* Free any previously allocated psymbol lists. */
1880 if (objfile -> global_psymbols.list)
1882 mfree (objfile -> md, (PTR)objfile -> global_psymbols.list);
1884 if (objfile -> static_psymbols.list)
1886 mfree (objfile -> md, (PTR)objfile -> static_psymbols.list);
1889 /* Current best guess is that approximately a twentieth
1890 of the total symbols (in a debugging file) are global or static
1893 objfile -> global_psymbols.size = total_symbols / 10;
1894 objfile -> static_psymbols.size = total_symbols / 10;
1896 if (objfile -> global_psymbols.size > 0)
1898 objfile -> global_psymbols.next =
1899 objfile -> global_psymbols.list = (struct partial_symbol **)
1900 xmmalloc (objfile -> md, (objfile -> global_psymbols.size
1901 * sizeof (struct partial_symbol *)));
1903 if (objfile -> static_psymbols.size > 0)
1905 objfile -> static_psymbols.next =
1906 objfile -> static_psymbols.list = (struct partial_symbol **)
1907 xmmalloc (objfile -> md, (objfile -> static_psymbols.size
1908 * sizeof (struct partial_symbol *)));
1913 The following code implements an abstraction for debugging overlay sections.
1915 The target model is as follows:
1916 1) The gnu linker will permit multiple sections to be mapped into the
1917 same VMA, each with its own unique LMA (or load address).
1918 2) It is assumed that some runtime mechanism exists for mapping the
1919 sections, one by one, from the load address into the VMA address.
1920 3) This code provides a mechanism for gdb to keep track of which
1921 sections should be considered to be mapped from the VMA to the LMA.
1922 This information is used for symbol lookup, and memory read/write.
1923 For instance, if a section has been mapped then its contents
1924 should be read from the VMA, otherwise from the LMA.
1926 Two levels of debugger support for overlays are available. One is
1927 "manual", in which the debugger relies on the user to tell it which
1928 overlays are currently mapped. This level of support is
1929 implemented entirely in the core debugger, and the information about
1930 whether a section is mapped is kept in the objfile->obj_section table.
1932 The second level of support is "automatic", and is only available if
1933 the target-specific code provides functionality to read the target's
1934 overlay mapping table, and translate its contents for the debugger
1935 (by updating the mapped state information in the obj_section tables).
1937 The interface is as follows:
1939 overlay map <name> -- tell gdb to consider this section mapped
1940 overlay unmap <name> -- tell gdb to consider this section unmapped
1941 overlay list -- list the sections that GDB thinks are mapped
1942 overlay read-target -- get the target's state of what's mapped
1943 overlay off/manual/auto -- set overlay debugging state
1944 Functional interface:
1945 find_pc_mapped_section(pc): if the pc is in the range of a mapped
1946 section, return that section.
1947 find_pc_overlay(pc): find any overlay section that contains
1948 the pc, either in its VMA or its LMA
1949 overlay_is_mapped(sect): true if overlay is marked as mapped
1950 section_is_overlay(sect): true if section's VMA != LMA
1951 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
1952 pc_in_unmapped_range(...): true if pc belongs to section's LMA
1953 overlay_mapped_address(...): map an address from section's LMA to VMA
1954 overlay_unmapped_address(...): map an address from section's VMA to LMA
1955 symbol_overlayed_address(...): Return a "current" address for symbol:
1956 either in VMA or LMA depending on whether
1957 the symbol's section is currently mapped
1960 /* Overlay debugging state: */
1962 int overlay_debugging = 0; /* 0 == off, 1 == manual, -1 == auto */
1963 int overlay_cache_invalid = 0; /* True if need to refresh mapped state */
1965 /* Target vector for refreshing overlay mapped state */
1966 static void simple_overlay_update PARAMS ((struct obj_section *));
1967 void (*target_overlay_update) PARAMS ((struct obj_section *))
1968 = simple_overlay_update;
1970 /* Function: section_is_overlay (SECTION)
1971 Returns true if SECTION has VMA not equal to LMA, ie.
1972 SECTION is loaded at an address different from where it will "run". */
1975 section_is_overlay (section)
1978 if (overlay_debugging)
1979 if (section && section->lma != 0 &&
1980 section->vma != section->lma)
1986 /* Function: overlay_invalidate_all (void)
1987 Invalidate the mapped state of all overlay sections (mark it as stale). */
1990 overlay_invalidate_all ()
1992 struct objfile *objfile;
1993 struct obj_section *sect;
1995 ALL_OBJSECTIONS (objfile, sect)
1996 if (section_is_overlay (sect->the_bfd_section))
1997 sect->ovly_mapped = -1;
2000 /* Function: overlay_is_mapped (SECTION)
2001 Returns true if section is an overlay, and is currently mapped.
2002 Private: public access is thru function section_is_mapped.
2004 Access to the ovly_mapped flag is restricted to this function, so
2005 that we can do automatic update. If the global flag
2006 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2007 overlay_invalidate_all. If the mapped state of the particular
2008 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2011 overlay_is_mapped (osect)
2012 struct obj_section *osect;
2014 if (osect == 0 || !section_is_overlay (osect->the_bfd_section))
2017 switch (overlay_debugging)
2020 case 0: return 0; /* overlay debugging off */
2021 case -1: /* overlay debugging automatic */
2022 /* Unles there is a target_overlay_update function,
2023 there's really nothing useful to do here (can't really go auto) */
2024 if (target_overlay_update)
2026 if (overlay_cache_invalid)
2028 overlay_invalidate_all ();
2029 overlay_cache_invalid = 0;
2031 if (osect->ovly_mapped == -1)
2032 (*target_overlay_update) (osect);
2034 /* fall thru to manual case */
2035 case 1: /* overlay debugging manual */
2036 return osect->ovly_mapped == 1;
2040 /* Function: section_is_mapped
2041 Returns true if section is an overlay, and is currently mapped. */
2044 section_is_mapped (section)
2047 struct objfile *objfile;
2048 struct obj_section *osect;
2050 if (overlay_debugging)
2051 if (section && section_is_overlay (section))
2052 ALL_OBJSECTIONS (objfile, osect)
2053 if (osect->the_bfd_section == section)
2054 return overlay_is_mapped (osect);
2059 /* Function: pc_in_unmapped_range
2060 If PC falls into the lma range of SECTION, return true, else false. */
2063 pc_in_unmapped_range (pc, section)
2069 if (overlay_debugging)
2070 if (section && section_is_overlay (section))
2072 size = bfd_get_section_size_before_reloc (section);
2073 if (section->lma <= pc && pc < section->lma + size)
2079 /* Function: pc_in_mapped_range
2080 If PC falls into the vma range of SECTION, return true, else false. */
2083 pc_in_mapped_range (pc, section)
2089 if (overlay_debugging)
2090 if (section && section_is_overlay (section))
2092 size = bfd_get_section_size_before_reloc (section);
2093 if (section->vma <= pc && pc < section->vma + size)
2099 /* Function: overlay_unmapped_address (PC, SECTION)
2100 Returns the address corresponding to PC in the unmapped (load) range.
2101 May be the same as PC. */
2104 overlay_unmapped_address (pc, section)
2108 if (overlay_debugging)
2109 if (section && section_is_overlay (section) &&
2110 pc_in_mapped_range (pc, section))
2111 return pc + section->lma - section->vma;
2116 /* Function: overlay_mapped_address (PC, SECTION)
2117 Returns the address corresponding to PC in the mapped (runtime) range.
2118 May be the same as PC. */
2121 overlay_mapped_address (pc, section)
2125 if (overlay_debugging)
2126 if (section && section_is_overlay (section) &&
2127 pc_in_unmapped_range (pc, section))
2128 return pc + section->vma - section->lma;
2134 /* Function: symbol_overlayed_address
2135 Return one of two addresses (relative to the VMA or to the LMA),
2136 depending on whether the section is mapped or not. */
2139 symbol_overlayed_address (address, section)
2143 if (overlay_debugging)
2145 /* If the symbol has no section, just return its regular address. */
2148 /* If the symbol's section is not an overlay, just return its address */
2149 if (!section_is_overlay (section))
2151 /* If the symbol's section is mapped, just return its address */
2152 if (section_is_mapped (section))
2155 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
2156 * then return its LOADED address rather than its vma address!!
2158 return overlay_unmapped_address (address, section);
2163 /* Function: find_pc_overlay (PC)
2164 Return the best-match overlay section for PC:
2165 If PC matches a mapped overlay section's VMA, return that section.
2166 Else if PC matches an unmapped section's VMA, return that section.
2167 Else if PC matches an unmapped section's LMA, return that section. */
2170 find_pc_overlay (pc)
2173 struct objfile *objfile;
2174 struct obj_section *osect, *best_match = NULL;
2176 if (overlay_debugging)
2177 ALL_OBJSECTIONS (objfile, osect)
2178 if (section_is_overlay (osect->the_bfd_section))
2180 if (pc_in_mapped_range (pc, osect->the_bfd_section))
2182 if (overlay_is_mapped (osect))
2183 return osect->the_bfd_section;
2187 else if (pc_in_unmapped_range (pc, osect->the_bfd_section))
2190 return best_match ? best_match->the_bfd_section : NULL;
2193 /* Function: find_pc_mapped_section (PC)
2194 If PC falls into the VMA address range of an overlay section that is
2195 currently marked as MAPPED, return that section. Else return NULL. */
2198 find_pc_mapped_section (pc)
2201 struct objfile *objfile;
2202 struct obj_section *osect;
2204 if (overlay_debugging)
2205 ALL_OBJSECTIONS (objfile, osect)
2206 if (pc_in_mapped_range (pc, osect->the_bfd_section) &&
2207 overlay_is_mapped (osect))
2208 return osect->the_bfd_section;
2213 /* Function: list_overlays_command
2214 Print a list of mapped sections and their PC ranges */
2217 list_overlays_command (args, from_tty)
2222 struct objfile *objfile;
2223 struct obj_section *osect;
2225 if (overlay_debugging)
2226 ALL_OBJSECTIONS (objfile, osect)
2227 if (overlay_is_mapped (osect))
2233 vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section);
2234 lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section);
2235 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
2236 name = bfd_section_name (objfile->obfd, osect->the_bfd_section);
2237 printf_filtered ("Section %s, loaded at %08x - %08x, ",
2238 name, lma, lma + size);
2239 printf_filtered ("mapped at %08x - %08x\n",
2244 printf_filtered ("No sections are mapped.\n");
2247 /* Function: map_overlay_command
2248 Mark the named section as mapped (ie. residing at its VMA address). */
2251 map_overlay_command (args, from_tty)
2255 struct objfile *objfile, *objfile2;
2256 struct obj_section *sec, *sec2;
2259 if (!overlay_debugging)
2260 error ("Overlay debugging not enabled. Use the 'OVERLAY ON' command.");
2262 if (args == 0 || *args == 0)
2263 error ("Argument required: name of an overlay section");
2265 /* First, find a section matching the user supplied argument */
2266 ALL_OBJSECTIONS (objfile, sec)
2267 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
2269 /* Now, check to see if the section is an overlay. */
2270 bfdsec = sec->the_bfd_section;
2271 if (!section_is_overlay (bfdsec))
2272 continue; /* not an overlay section */
2274 /* Mark the overlay as "mapped" */
2275 sec->ovly_mapped = 1;
2277 /* Next, make a pass and unmap any sections that are
2278 overlapped by this new section: */
2279 ALL_OBJSECTIONS (objfile2, sec2)
2280 if (sec2->ovly_mapped &&
2282 sec->the_bfd_section != sec2->the_bfd_section &&
2283 (pc_in_mapped_range (sec2->addr, sec->the_bfd_section) ||
2284 pc_in_mapped_range (sec2->endaddr, sec->the_bfd_section)))
2287 printf_filtered ("Note: section %s unmapped by overlap\n",
2288 bfd_section_name (objfile->obfd,
2289 sec2->the_bfd_section));
2290 sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2 */
2294 error ("No overlay section called %s", args);
2297 /* Function: unmap_overlay_command
2298 Mark the overlay section as unmapped
2299 (ie. resident in its LMA address range, rather than the VMA range). */
2302 unmap_overlay_command (args, from_tty)
2306 struct objfile *objfile;
2307 struct obj_section *sec;
2309 if (!overlay_debugging)
2310 error ("Overlay debugging not enabled. Use the 'OVERLAY ON' command.");
2312 if (args == 0 || *args == 0)
2313 error ("Argument required: name of an overlay section");
2315 /* First, find a section matching the user supplied argument */
2316 ALL_OBJSECTIONS (objfile, sec)
2317 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
2319 if (!sec->ovly_mapped)
2320 error ("Section %s is not mapped", args);
2321 sec->ovly_mapped = 0;
2324 error ("No overlay section called %s", args);
2327 /* Function: overlay_auto_command
2328 A utility command to turn on overlay debugging.
2329 Possibly this should be done via a set/show command. */
2332 overlay_auto_command (args, from_tty)
2334 overlay_debugging = -1;
2336 printf_filtered ("Automatic overlay debugging enabled.");
2339 /* Function: overlay_manual_command
2340 A utility command to turn on overlay debugging.
2341 Possibly this should be done via a set/show command. */
2344 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)
2358 overlay_debugging = 0;
2360 printf_filtered ("Overlay debugging disabled.");
2364 overlay_load_command (args, from_tty)
2366 if (target_overlay_update)
2367 (*target_overlay_update) (NULL);
2369 error ("This target does not know how to read its overlay state.");
2372 /* Function: overlay_command
2373 A place-holder for a mis-typed command */
2375 /* Command list chain containing all defined "overlay" subcommands. */
2376 struct cmd_list_element *overlaylist;
2379 overlay_command (args, from_tty)
2384 ("\"overlay\" must be followed by the name of an overlay command.\n");
2385 help_list (overlaylist, "overlay ", -1, gdb_stdout);
2389 /* Target Overlays for the "Simplest" overlay manager:
2391 This is GDB's default target overlay layer. It works with the
2392 minimal overlay manager supplied as an example by Cygnus. The
2393 entry point is via a function pointer "target_overlay_update",
2394 so targets that use a different runtime overlay manager can
2395 substitute their own overlay_update function and take over the
2398 The overlay_update function pokes around in the target's data structures
2399 to see what overlays are mapped, and updates GDB's overlay mapping with
2402 In this simple implementation, the target data structures are as follows:
2403 unsigned _novlys; /# number of overlay sections #/
2404 unsigned _ovly_table[_novlys][4] = {
2405 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
2406 {..., ..., ..., ...},
2408 unsigned _novly_regions; /# number of overlay regions #/
2409 unsigned _ovly_region_table[_novly_regions][3] = {
2410 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
2413 These functions will attempt to update GDB's mappedness state in the
2414 symbol section table, based on the target's mappedness state.
2416 To do this, we keep a cached copy of the target's _ovly_table, and
2417 attempt to detect when the cached copy is invalidated. The main
2418 entry point is "simple_overlay_update(SECT), which looks up SECT in
2419 the cached table and re-reads only the entry for that section from
2420 the target (whenever possible).
2423 /* Cached, dynamically allocated copies of the target data structures: */
2424 static unsigned (*cache_ovly_table)[4] = 0;
2426 static unsigned (*cache_ovly_region_table)[3] = 0;
2428 static unsigned cache_novlys = 0;
2430 static unsigned cache_novly_regions = 0;
2432 static CORE_ADDR cache_ovly_table_base = 0;
2434 static CORE_ADDR cache_ovly_region_table_base = 0;
2436 enum ovly_index { VMA, SIZE, LMA, MAPPED};
2437 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
2439 /* Throw away the cached copy of _ovly_table */
2441 simple_free_overlay_table ()
2443 if (cache_ovly_table)
2444 free(cache_ovly_table);
2446 cache_ovly_table = NULL;
2447 cache_ovly_table_base = 0;
2451 /* Throw away the cached copy of _ovly_region_table */
2453 simple_free_overlay_region_table ()
2455 if (cache_ovly_region_table)
2456 free(cache_ovly_region_table);
2457 cache_novly_regions = 0;
2458 cache_ovly_region_table = NULL;
2459 cache_ovly_region_table_base = 0;
2463 /* Read an array of ints from the target into a local buffer.
2464 Convert to host order. int LEN is number of ints */
2466 read_target_long_array (memaddr, myaddr, len)
2468 unsigned int *myaddr;
2471 char *buf = alloca (len * TARGET_LONG_BYTES);
2474 read_memory (memaddr, buf, len * TARGET_LONG_BYTES);
2475 for (i = 0; i < len; i++)
2476 myaddr[i] = extract_unsigned_integer (TARGET_LONG_BYTES * i + buf,
2480 /* Find and grab a copy of the target _ovly_table
2481 (and _novlys, which is needed for the table's size) */
2483 simple_read_overlay_table ()
2485 struct minimal_symbol *msym;
2487 simple_free_overlay_table ();
2488 msym = lookup_minimal_symbol ("_novlys", 0, 0);
2490 cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4);
2492 return 0; /* failure */
2493 cache_ovly_table = (void *) xmalloc (cache_novlys * sizeof(*cache_ovly_table));
2494 if (cache_ovly_table != NULL)
2496 msym = lookup_minimal_symbol ("_ovly_table", 0, 0);
2499 cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (msym);
2500 read_target_long_array (cache_ovly_table_base,
2501 (int *) cache_ovly_table,
2505 return 0; /* failure */
2508 return 0; /* failure */
2509 return 1; /* SUCCESS */
2513 /* Find and grab a copy of the target _ovly_region_table
2514 (and _novly_regions, which is needed for the table's size) */
2516 simple_read_overlay_region_table ()
2518 struct minimal_symbol *msym;
2520 simple_free_overlay_region_table ();
2521 msym = lookup_minimal_symbol ("_novly_regions", 0, 0);
2523 cache_novly_regions = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4);
2525 return 0; /* failure */
2526 cache_ovly_region_table = (void *) xmalloc (cache_novly_regions * 12);
2527 if (cache_ovly_region_table != NULL)
2529 msym = lookup_minimal_symbol ("_ovly_region_table", 0, 0);
2532 cache_ovly_region_table_base = SYMBOL_VALUE_ADDRESS (msym);
2533 read_target_long_array (cache_ovly_region_table_base,
2534 (int *) cache_ovly_region_table,
2535 cache_novly_regions * 3);
2538 return 0; /* failure */
2541 return 0; /* failure */
2542 return 1; /* SUCCESS */
2546 /* Function: simple_overlay_update_1
2547 A helper function for simple_overlay_update. Assuming a cached copy
2548 of _ovly_table exists, look through it to find an entry whose vma,
2549 lma and size match those of OSECT. Re-read the entry and make sure
2550 it still matches OSECT (else the table may no longer be valid).
2551 Set OSECT's mapped state to match the entry. Return: 1 for
2552 success, 0 for failure. */
2555 simple_overlay_update_1 (osect)
2556 struct obj_section *osect;
2560 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
2561 for (i = 0; i < cache_novlys; i++)
2562 if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma &&
2563 cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* &&
2564 cache_ovly_table[i][SIZE] == size */)
2566 read_target_long_array (cache_ovly_table_base + i * TARGET_LONG_BYTES,
2567 (int *) cache_ovly_table[i], 4);
2568 if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma &&
2569 cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* &&
2570 cache_ovly_table[i][SIZE] == size */)
2572 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
2575 else /* Warning! Warning! Target's ovly table has changed! */
2581 /* Function: simple_overlay_update
2582 If OSECT is NULL, then update all sections' mapped state
2583 (after re-reading the entire target _ovly_table).
2584 If OSECT is non-NULL, then try to find a matching entry in the
2585 cached ovly_table and update only OSECT's mapped state.
2586 If a cached entry can't be found or the cache isn't valid, then
2587 re-read the entire cache, and go ahead and update all sections. */
2590 simple_overlay_update (osect)
2591 struct obj_section *osect;
2593 struct objfile *objfile;
2595 /* Were we given an osect to look up? NULL means do all of them. */
2597 /* Have we got a cached copy of the target's overlay table? */
2598 if (cache_ovly_table != NULL)
2599 /* Does its cached location match what's currently in the symtab? */
2600 if (cache_ovly_table_base ==
2601 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", 0, 0)))
2602 /* Then go ahead and try to look up this single section in the cache */
2603 if (simple_overlay_update_1 (osect))
2604 /* Found it! We're done. */
2607 /* Cached table no good: need to read the entire table anew.
2608 Or else we want all the sections, in which case it's actually
2609 more efficient to read the whole table in one block anyway. */
2611 if (simple_read_overlay_table () == 0) /* read failed? No table? */
2613 warning ("Failed to read the target overlay mapping table.");
2616 /* Now may as well update all sections, even if only one was requested. */
2617 ALL_OBJSECTIONS (objfile, osect)
2618 if (section_is_overlay (osect->the_bfd_section))
2622 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
2623 for (i = 0; i < cache_novlys; i++)
2624 if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma &&
2625 cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* &&
2626 cache_ovly_table[i][SIZE] == size */)
2627 { /* obj_section matches i'th entry in ovly_table */
2628 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
2629 break; /* finished with inner for loop: break out */
2636 _initialize_symfile ()
2638 struct cmd_list_element *c;
2640 c = add_cmd ("symbol-file", class_files, symbol_file_command,
2641 "Load symbol table from executable file FILE.\n\
2642 The `file' command can also load symbol tables, as well as setting the file\n\
2643 to execute.", &cmdlist);
2644 c->completer = filename_completer;
2646 c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command,
2647 "Usage: add-symbol-file FILE ADDR\n\
2648 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
2649 ADDR is the starting address of the file's text.",
2651 c->completer = filename_completer;
2653 c = add_cmd ("add-shared-symbol-files", class_files,
2654 add_shared_symbol_files_command,
2655 "Load the symbols from shared objects in the dynamic linker's link map.",
2657 c = add_alias_cmd ("assf", "add-shared-symbol-files", class_files, 1,
2660 c = add_cmd ("load", class_files, load_command,
2661 "Dynamically load FILE into the running program, and record its symbols\n\
2662 for access from GDB.", &cmdlist);
2663 c->completer = filename_completer;
2666 (add_set_cmd ("symbol-reloading", class_support, var_boolean,
2667 (char *)&symbol_reloading,
2668 "Set dynamic symbol table reloading multiple times in one run.",
2672 add_prefix_cmd ("overlay", class_support, overlay_command,
2673 "Commands for debugging overlays.", &overlaylist,
2674 "overlay ", 0, &cmdlist);
2676 add_com_alias ("ovly", "overlay", class_alias, 1);
2677 add_com_alias ("ov", "overlay", class_alias, 1);
2679 add_cmd ("map-overlay", class_support, map_overlay_command,
2680 "Assert that an overlay section is mapped.", &overlaylist);
2682 add_cmd ("unmap-overlay", class_support, unmap_overlay_command,
2683 "Assert that an overlay section is unmapped.", &overlaylist);
2685 add_cmd ("list-overlays", class_support, list_overlays_command,
2686 "List mappings of overlay sections.", &overlaylist);
2688 add_cmd ("manual", class_support, overlay_manual_command,
2689 "Enable overlay debugging.", &overlaylist);
2690 add_cmd ("off", class_support, overlay_off_command,
2691 "Disable overlay debugging.", &overlaylist);
2692 add_cmd ("auto", class_support, overlay_auto_command,
2693 "Enable automatic overlay debugging.", &overlaylist);
2694 add_cmd ("load-target", class_support, overlay_load_command,
2695 "Read the overlay mapping state from the target.", &overlaylist);