1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
4 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
6 Contributed by Cygnus Support, using pieces from other GDB modules.
8 This file is part of GDB.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 59 Temple Place - Suite 330,
23 Boston, MA 02111-1307, USA. */
36 #include "breakpoint.h"
38 #include "complaints.h"
40 #include "inferior.h" /* for write_pc */
41 #include "gdb-stabs.h"
42 #include "gdb_obstack.h"
43 #include "completer.h"
46 #include <sys/types.h>
48 #include "gdb_string.h"
59 /* Some HP-UX related globals to clear when a new "main"
60 symbol file is loaded. HP-specific. */
62 extern int hp_som_som_object_present;
63 extern int hp_cxx_exception_support_initialized;
64 #define RESET_HP_UX_GLOBALS() do {\
65 hp_som_som_object_present = 0; /* indicates HP-compiled code */ \
66 hp_cxx_exception_support_initialized = 0; /* must reinitialize exception stuff */ \
70 int (*ui_load_progress_hook) (const char *section, unsigned long num);
71 void (*show_load_progress) (const char *section,
72 unsigned long section_sent,
73 unsigned long section_size,
74 unsigned long total_sent,
75 unsigned long total_size);
76 void (*pre_add_symbol_hook) (char *);
77 void (*post_add_symbol_hook) (void);
78 void (*target_new_objfile_hook) (struct objfile *);
80 static void clear_symtab_users_cleanup (void *ignore);
82 /* Global variables owned by this file */
83 int readnow_symbol_files; /* Read full symbols immediately */
85 /* External variables and functions referenced. */
87 extern void report_transfer_performance (unsigned long, time_t, time_t);
89 /* Functions this file defines */
92 static int simple_read_overlay_region_table (void);
93 static void simple_free_overlay_region_table (void);
96 static void set_initial_language (void);
98 static void load_command (char *, int);
100 static void symbol_file_add_main_1 (char *args, int from_tty, int flags);
102 static void add_symbol_file_command (char *, int);
104 static void add_shared_symbol_files_command (char *, int);
106 static void cashier_psymtab (struct partial_symtab *);
108 bfd *symfile_bfd_open (char *);
110 int get_section_index (struct objfile *, char *);
112 static void find_sym_fns (struct objfile *);
114 static void decrement_reading_symtab (void *);
116 static void overlay_invalidate_all (void);
118 static int overlay_is_mapped (struct obj_section *);
120 void list_overlays_command (char *, int);
122 void map_overlay_command (char *, int);
124 void unmap_overlay_command (char *, int);
126 static void overlay_auto_command (char *, int);
128 static void overlay_manual_command (char *, int);
130 static void overlay_off_command (char *, int);
132 static void overlay_load_command (char *, int);
134 static void overlay_command (char *, int);
136 static void simple_free_overlay_table (void);
138 static void read_target_long_array (CORE_ADDR, unsigned int *, int);
140 static int simple_read_overlay_table (void);
142 static int simple_overlay_update_1 (struct obj_section *);
144 static void add_filename_language (char *ext, enum language lang);
146 static void set_ext_lang_command (char *args, int from_tty);
148 static void info_ext_lang_command (char *args, int from_tty);
150 static void init_filename_language_table (void);
152 void _initialize_symfile (void);
154 /* List of all available sym_fns. On gdb startup, each object file reader
155 calls add_symtab_fns() to register information on each format it is
158 static struct sym_fns *symtab_fns = NULL;
160 /* Flag for whether user will be reloading symbols multiple times.
161 Defaults to ON for VxWorks, otherwise OFF. */
163 #ifdef SYMBOL_RELOADING_DEFAULT
164 int symbol_reloading = SYMBOL_RELOADING_DEFAULT;
166 int symbol_reloading = 0;
169 /* If non-zero, shared library symbols will be added automatically
170 when the inferior is created, new libraries are loaded, or when
171 attaching to the inferior. This is almost always what users will
172 want to have happen; but for very large programs, the startup time
173 will be excessive, and so if this is a problem, the user can clear
174 this flag and then add the shared library symbols as needed. Note
175 that there is a potential for confusion, since if the shared
176 library symbols are not loaded, commands like "info fun" will *not*
177 report all the functions that are actually present. */
179 int auto_solib_add = 1;
181 /* For systems that support it, a threshold size in megabytes. If
182 automatically adding a new library's symbol table to those already
183 known to the debugger would cause the total shared library symbol
184 size to exceed this threshhold, then the shlib's symbols are not
185 added. The threshold is ignored if the user explicitly asks for a
186 shlib to be added, such as when using the "sharedlibrary"
189 int auto_solib_limit;
192 /* Since this function is called from within qsort, in an ANSI environment
193 it must conform to the prototype for qsort, which specifies that the
194 comparison function takes two "void *" pointers. */
197 compare_symbols (const void *s1p, const void *s2p)
199 register struct symbol **s1, **s2;
201 s1 = (struct symbol **) s1p;
202 s2 = (struct symbol **) s2p;
203 return (strcmp (SYMBOL_SOURCE_NAME (*s1), SYMBOL_SOURCE_NAME (*s2)));
210 compare_psymbols -- compare two partial symbols by name
214 Given pointers to pointers to two partial symbol table entries,
215 compare them by name and return -N, 0, or +N (ala strcmp).
216 Typically used by sorting routines like qsort().
220 Does direct compare of first two characters before punting
221 and passing to strcmp for longer compares. Note that the
222 original version had a bug whereby two null strings or two
223 identically named one character strings would return the
224 comparison of memory following the null byte.
229 compare_psymbols (const void *s1p, const void *s2p)
231 register struct partial_symbol **s1, **s2;
232 register char *st1, *st2;
234 s1 = (struct partial_symbol **) s1p;
235 s2 = (struct partial_symbol **) s2p;
236 st1 = SYMBOL_SOURCE_NAME (*s1);
237 st2 = SYMBOL_SOURCE_NAME (*s2);
240 if ((st1[0] - st2[0]) || !st1[0])
242 return (st1[0] - st2[0]);
244 else if ((st1[1] - st2[1]) || !st1[1])
246 return (st1[1] - st2[1]);
250 return (strcmp (st1, st2));
255 sort_pst_symbols (struct partial_symtab *pst)
257 /* Sort the global list; don't sort the static list */
259 qsort (pst->objfile->global_psymbols.list + pst->globals_offset,
260 pst->n_global_syms, sizeof (struct partial_symbol *),
264 /* Call sort_block_syms to sort alphabetically the symbols of one block. */
267 sort_block_syms (register struct block *b)
269 qsort (&BLOCK_SYM (b, 0), BLOCK_NSYMS (b),
270 sizeof (struct symbol *), compare_symbols);
273 /* Call sort_symtab_syms to sort alphabetically
274 the symbols of each block of one symtab. */
277 sort_symtab_syms (register struct symtab *s)
279 register struct blockvector *bv;
282 register struct block *b;
286 bv = BLOCKVECTOR (s);
287 nbl = BLOCKVECTOR_NBLOCKS (bv);
288 for (i = 0; i < nbl; i++)
290 b = BLOCKVECTOR_BLOCK (bv, i);
291 if (BLOCK_SHOULD_SORT (b))
296 /* Make a null terminated copy of the string at PTR with SIZE characters in
297 the obstack pointed to by OBSTACKP . Returns the address of the copy.
298 Note that the string at PTR does not have to be null terminated, I.E. it
299 may be part of a larger string and we are only saving a substring. */
302 obsavestring (const char *ptr, int size, struct obstack *obstackp)
304 register char *p = (char *) obstack_alloc (obstackp, size + 1);
305 /* Open-coded memcpy--saves function call time. These strings are usually
306 short. FIXME: Is this really still true with a compiler that can
309 register const char *p1 = ptr;
310 register char *p2 = p;
311 const char *end = ptr + size;
319 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
320 in the obstack pointed to by OBSTACKP. */
323 obconcat (struct obstack *obstackp, const char *s1, const char *s2,
326 register int len = strlen (s1) + strlen (s2) + strlen (s3) + 1;
327 register char *val = (char *) obstack_alloc (obstackp, len);
334 /* True if we are nested inside psymtab_to_symtab. */
336 int currently_reading_symtab = 0;
339 decrement_reading_symtab (void *dummy)
341 currently_reading_symtab--;
344 /* Get the symbol table that corresponds to a partial_symtab.
345 This is fast after the first time you do it. In fact, there
346 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
350 psymtab_to_symtab (register struct partial_symtab *pst)
352 /* If it's been looked up before, return it. */
356 /* If it has not yet been read in, read it. */
359 struct cleanup *back_to = make_cleanup (decrement_reading_symtab, NULL);
360 currently_reading_symtab++;
361 (*pst->read_symtab) (pst);
362 do_cleanups (back_to);
368 /* Initialize entry point information for this objfile. */
371 init_entry_point_info (struct objfile *objfile)
373 /* Save startup file's range of PC addresses to help blockframe.c
374 decide where the bottom of the stack is. */
376 if (bfd_get_file_flags (objfile->obfd) & EXEC_P)
378 /* Executable file -- record its entry point so we'll recognize
379 the startup file because it contains the entry point. */
380 objfile->ei.entry_point = bfd_get_start_address (objfile->obfd);
384 /* Examination of non-executable.o files. Short-circuit this stuff. */
385 objfile->ei.entry_point = INVALID_ENTRY_POINT;
387 objfile->ei.entry_file_lowpc = INVALID_ENTRY_LOWPC;
388 objfile->ei.entry_file_highpc = INVALID_ENTRY_HIGHPC;
389 objfile->ei.entry_func_lowpc = INVALID_ENTRY_LOWPC;
390 objfile->ei.entry_func_highpc = INVALID_ENTRY_HIGHPC;
391 objfile->ei.main_func_lowpc = INVALID_ENTRY_LOWPC;
392 objfile->ei.main_func_highpc = INVALID_ENTRY_HIGHPC;
395 /* Get current entry point address. */
398 entry_point_address (void)
400 return symfile_objfile ? symfile_objfile->ei.entry_point : 0;
403 /* Remember the lowest-addressed loadable section we've seen.
404 This function is called via bfd_map_over_sections.
406 In case of equal vmas, the section with the largest size becomes the
407 lowest-addressed loadable section.
409 If the vmas and sizes are equal, the last section is considered the
410 lowest-addressed loadable section. */
413 find_lowest_section (bfd *abfd, asection *sect, PTR obj)
415 asection **lowest = (asection **) obj;
417 if (0 == (bfd_get_section_flags (abfd, sect) & SEC_LOAD))
420 *lowest = sect; /* First loadable section */
421 else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect))
422 *lowest = sect; /* A lower loadable section */
423 else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect)
424 && (bfd_section_size (abfd, (*lowest))
425 <= bfd_section_size (abfd, sect)))
430 /* Build (allocate and populate) a section_addr_info struct from
431 an existing section table. */
433 extern struct section_addr_info *
434 build_section_addr_info_from_section_table (const struct section_table *start,
435 const struct section_table *end)
437 struct section_addr_info *sap;
438 const struct section_table *stp;
441 sap = xmalloc (sizeof (struct section_addr_info));
442 memset (sap, 0, sizeof (struct section_addr_info));
444 for (stp = start, oidx = 0; stp != end; stp++)
446 if (bfd_get_section_flags (stp->bfd,
447 stp->the_bfd_section) & (SEC_ALLOC | SEC_LOAD)
448 && oidx < MAX_SECTIONS)
450 sap->other[oidx].addr = stp->addr;
451 sap->other[oidx].name
452 = xstrdup (bfd_section_name (stp->bfd, stp->the_bfd_section));
453 sap->other[oidx].sectindex = stp->the_bfd_section->index;
462 /* Free all memory allocated by build_section_addr_info_from_section_table. */
465 free_section_addr_info (struct section_addr_info *sap)
469 for (idx = 0; idx < MAX_SECTIONS; idx++)
470 if (sap->other[idx].name)
471 xfree (sap->other[idx].name);
476 /* Parse the user's idea of an offset for dynamic linking, into our idea
477 of how to represent it for fast symbol reading. This is the default
478 version of the sym_fns.sym_offsets function for symbol readers that
479 don't need to do anything special. It allocates a section_offsets table
480 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
483 default_symfile_offsets (struct objfile *objfile,
484 struct section_addr_info *addrs)
487 asection *sect = NULL;
489 objfile->num_sections = SECT_OFF_MAX;
490 objfile->section_offsets = (struct section_offsets *)
491 obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS);
492 memset (objfile->section_offsets, 0, SIZEOF_SECTION_OFFSETS);
494 /* Now calculate offsets for section that were specified by the
496 for (i = 0; i < MAX_SECTIONS && addrs->other[i].name; i++)
498 struct other_sections *osp ;
500 osp = &addrs->other[i] ;
504 /* Record all sections in offsets */
505 /* The section_offsets in the objfile are here filled in using
507 (objfile->section_offsets)->offsets[osp->sectindex] = osp->addr;
510 /* Remember the bfd indexes for the .text, .data, .bss and
513 sect = bfd_get_section_by_name (objfile->obfd, ".text");
515 objfile->sect_index_text = sect->index;
517 sect = bfd_get_section_by_name (objfile->obfd, ".data");
519 objfile->sect_index_data = sect->index;
521 sect = bfd_get_section_by_name (objfile->obfd, ".bss");
523 objfile->sect_index_bss = sect->index;
525 sect = bfd_get_section_by_name (objfile->obfd, ".rodata");
527 objfile->sect_index_rodata = sect->index;
529 /* This is where things get really weird... We MUST have valid
530 indices for the various sect_index_* members or gdb will abort.
531 So if for example, there is no ".text" section, we have to
532 accomodate that. Except when explicitly adding symbol files at
533 some address, section_offsets contains nothing but zeros, so it
534 doesn't matter which slot in section_offsets the individual
535 sect_index_* members index into. So if they are all zero, it is
536 safe to just point all the currently uninitialized indices to the
539 for (i = 0; i < objfile->num_sections; i++)
541 if (ANOFFSET (objfile->section_offsets, i) != 0)
546 if (i == objfile->num_sections)
548 if (objfile->sect_index_text == -1)
549 objfile->sect_index_text = 0;
550 if (objfile->sect_index_data == -1)
551 objfile->sect_index_data = 0;
552 if (objfile->sect_index_bss == -1)
553 objfile->sect_index_bss = 0;
554 if (objfile->sect_index_rodata == -1)
555 objfile->sect_index_rodata = 0;
559 /* Process a symbol file, as either the main file or as a dynamically
562 OBJFILE is where the symbols are to be read from.
564 ADDR is the address where the text segment was loaded, unless the
565 objfile is the main symbol file, in which case it is zero.
567 MAINLINE is nonzero if this is the main symbol file, or zero if
568 it's an extra symbol file such as dynamically loaded code.
570 VERBO is nonzero if the caller has printed a verbose message about
571 the symbol reading (and complaints can be more terse about it). */
574 syms_from_objfile (struct objfile *objfile, struct section_addr_info *addrs,
575 int mainline, int verbo)
577 asection *lower_sect;
579 CORE_ADDR lower_offset;
580 struct section_addr_info local_addr;
581 struct cleanup *old_chain;
584 /* If ADDRS is NULL, initialize the local section_addr_info struct and
585 point ADDRS to it. We now establish the convention that an addr of
586 zero means no load address was specified. */
590 memset (&local_addr, 0, sizeof (local_addr));
594 init_entry_point_info (objfile);
595 find_sym_fns (objfile);
597 if (objfile->sf == NULL)
598 return; /* No symbols. */
600 /* Make sure that partially constructed symbol tables will be cleaned up
601 if an error occurs during symbol reading. */
602 old_chain = make_cleanup_free_objfile (objfile);
606 /* We will modify the main symbol table, make sure that all its users
607 will be cleaned up if an error occurs during symbol reading. */
608 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
610 /* Since no error yet, throw away the old symbol table. */
612 if (symfile_objfile != NULL)
614 free_objfile (symfile_objfile);
615 symfile_objfile = NULL;
618 /* Currently we keep symbols from the add-symbol-file command.
619 If the user wants to get rid of them, they should do "symbol-file"
620 without arguments first. Not sure this is the best behavior
623 (*objfile->sf->sym_new_init) (objfile);
626 /* Convert addr into an offset rather than an absolute address.
627 We find the lowest address of a loaded segment in the objfile,
628 and assume that <addr> is where that got loaded.
630 We no longer warn if the lowest section is not a text segment (as
631 happens for the PA64 port. */
634 /* Find lowest loadable section to be used as starting point for
635 continguous sections. FIXME!! won't work without call to find
636 .text first, but this assumes text is lowest section. */
637 lower_sect = bfd_get_section_by_name (objfile->obfd, ".text");
638 if (lower_sect == NULL)
639 bfd_map_over_sections (objfile->obfd, find_lowest_section,
641 if (lower_sect == NULL)
642 warning ("no loadable sections found in added symbol-file %s",
645 if ((bfd_get_section_flags (objfile->obfd, lower_sect) & SEC_CODE) == 0)
646 warning ("Lowest section in %s is %s at %s",
648 bfd_section_name (objfile->obfd, lower_sect),
649 paddr (bfd_section_vma (objfile->obfd, lower_sect)));
650 if (lower_sect != NULL)
651 lower_offset = bfd_section_vma (objfile->obfd, lower_sect);
655 /* Calculate offsets for the loadable sections.
656 FIXME! Sections must be in order of increasing loadable section
657 so that contiguous sections can use the lower-offset!!!
659 Adjust offsets if the segments are not contiguous.
660 If the section is contiguous, its offset should be set to
661 the offset of the highest loadable section lower than it
662 (the loadable section directly below it in memory).
663 this_offset = lower_offset = lower_addr - lower_orig_addr */
665 /* Calculate offsets for sections. */
666 for (i=0 ; i < MAX_SECTIONS && addrs->other[i].name; i++)
668 if (addrs->other[i].addr != 0)
670 sect = bfd_get_section_by_name (objfile->obfd, addrs->other[i].name);
673 addrs->other[i].addr -= bfd_section_vma (objfile->obfd, sect);
674 lower_offset = addrs->other[i].addr;
675 /* This is the index used by BFD. */
676 addrs->other[i].sectindex = sect->index ;
680 warning ("section %s not found in %s", addrs->other[i].name,
682 addrs->other[i].addr = 0;
686 addrs->other[i].addr = lower_offset;
690 /* Initialize symbol reading routines for this objfile, allow complaints to
691 appear for this new file, and record how verbose to be, then do the
692 initial symbol reading for this file. */
694 (*objfile->sf->sym_init) (objfile);
695 clear_complaints (&symfile_complaints, 1, verbo);
697 (*objfile->sf->sym_offsets) (objfile, addrs);
699 #ifndef IBM6000_TARGET
700 /* This is a SVR4/SunOS specific hack, I think. In any event, it
701 screws RS/6000. sym_offsets should be doing this sort of thing,
702 because it knows the mapping between bfd sections and
704 /* This is a hack. As far as I can tell, section offsets are not
705 target dependent. They are all set to addr with a couple of
706 exceptions. The exceptions are sysvr4 shared libraries, whose
707 offsets are kept in solib structures anyway and rs6000 xcoff
708 which handles shared libraries in a completely unique way.
710 Section offsets are built similarly, except that they are built
711 by adding addr in all cases because there is no clear mapping
712 from section_offsets into actual sections. Note that solib.c
713 has a different algorithm for finding section offsets.
715 These should probably all be collapsed into some target
716 independent form of shared library support. FIXME. */
720 struct obj_section *s;
722 /* Map section offsets in "addr" back to the object's
723 sections by comparing the section names with bfd's
724 section names. Then adjust the section address by
725 the offset. */ /* for gdb/13815 */
727 ALL_OBJFILE_OSECTIONS (objfile, s)
729 CORE_ADDR s_addr = 0;
733 !s_addr && i < MAX_SECTIONS && addrs->other[i].name;
735 if (strcmp (bfd_section_name (s->objfile->obfd,
737 addrs->other[i].name) == 0)
738 s_addr = addrs->other[i].addr; /* end added for gdb/13815 */
740 s->addr -= s->offset;
742 s->endaddr -= s->offset;
743 s->endaddr += s_addr;
747 #endif /* not IBM6000_TARGET */
749 (*objfile->sf->sym_read) (objfile, mainline);
751 if (!have_partial_symbols () && !have_full_symbols ())
754 printf_filtered ("(no debugging symbols found)...");
758 /* Don't allow char * to have a typename (else would get caddr_t).
759 Ditto void *. FIXME: Check whether this is now done by all the
760 symbol readers themselves (many of them now do), and if so remove
763 TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0;
764 TYPE_NAME (lookup_pointer_type (builtin_type_void)) = 0;
766 /* Mark the objfile has having had initial symbol read attempted. Note
767 that this does not mean we found any symbols... */
769 objfile->flags |= OBJF_SYMS;
771 /* Discard cleanups as symbol reading was successful. */
773 discard_cleanups (old_chain);
775 /* Call this after reading in a new symbol table to give target
776 dependent code a crack at the new symbols. For instance, this
777 could be used to update the values of target-specific symbols GDB
778 needs to keep track of (such as _sigtramp, or whatever). */
780 TARGET_SYMFILE_POSTREAD (objfile);
783 /* Perform required actions after either reading in the initial
784 symbols for a new objfile, or mapping in the symbols from a reusable
788 new_symfile_objfile (struct objfile *objfile, int mainline, int verbo)
791 /* If this is the main symbol file we have to clean up all users of the
792 old main symbol file. Otherwise it is sufficient to fixup all the
793 breakpoints that may have been redefined by this symbol file. */
796 /* OK, make it the "real" symbol file. */
797 symfile_objfile = objfile;
799 clear_symtab_users ();
803 breakpoint_re_set ();
806 /* We're done reading the symbol file; finish off complaints. */
807 clear_complaints (&symfile_complaints, 0, verbo);
810 /* Process a symbol file, as either the main file or as a dynamically
813 NAME is the file name (which will be tilde-expanded and made
814 absolute herein) (but we don't free or modify NAME itself).
815 FROM_TTY says how verbose to be. MAINLINE specifies whether this
816 is the main symbol file, or whether it's an extra symbol file such
817 as dynamically loaded code. If !mainline, ADDR is the address
818 where the text segment was loaded.
820 Upon success, returns a pointer to the objfile that was added.
821 Upon failure, jumps back to command level (never returns). */
824 symbol_file_add (char *name, int from_tty, struct section_addr_info *addrs,
825 int mainline, int flags)
827 struct objfile *objfile;
828 struct partial_symtab *psymtab;
831 /* Open a bfd for the file, and give user a chance to burp if we'd be
832 interactively wiping out any existing symbols. */
834 abfd = symfile_bfd_open (name);
836 if ((have_full_symbols () || have_partial_symbols ())
839 && !query ("Load new symbol table from \"%s\"? ", name))
840 error ("Not confirmed.");
842 objfile = allocate_objfile (abfd, flags);
844 /* If the objfile uses a mapped symbol file, and we have a psymtab for
845 it, then skip reading any symbols at this time. */
847 if ((objfile->flags & OBJF_MAPPED) && (objfile->flags & OBJF_SYMS))
849 /* We mapped in an existing symbol table file that already has had
850 initial symbol reading performed, so we can skip that part. Notify
851 the user that instead of reading the symbols, they have been mapped.
853 if (from_tty || info_verbose)
855 printf_filtered ("Mapped symbols for %s...", name);
857 gdb_flush (gdb_stdout);
859 init_entry_point_info (objfile);
860 find_sym_fns (objfile);
864 /* We either created a new mapped symbol table, mapped an existing
865 symbol table file which has not had initial symbol reading
866 performed, or need to read an unmapped symbol table. */
867 if (from_tty || info_verbose)
869 if (pre_add_symbol_hook)
870 pre_add_symbol_hook (name);
873 printf_filtered ("Reading symbols from %s...", name);
875 gdb_flush (gdb_stdout);
878 syms_from_objfile (objfile, addrs, mainline, from_tty);
881 /* We now have at least a partial symbol table. Check to see if the
882 user requested that all symbols be read on initial access via either
883 the gdb startup command line or on a per symbol file basis. Expand
884 all partial symbol tables for this objfile if so. */
886 if ((flags & OBJF_READNOW) || readnow_symbol_files)
888 if (from_tty || info_verbose)
890 printf_filtered ("expanding to full symbols...");
892 gdb_flush (gdb_stdout);
895 for (psymtab = objfile->psymtabs;
897 psymtab = psymtab->next)
899 psymtab_to_symtab (psymtab);
903 if (from_tty || info_verbose)
905 if (post_add_symbol_hook)
906 post_add_symbol_hook ();
909 printf_filtered ("done.\n");
913 /* We print some messages regardless of whether 'from_tty ||
914 info_verbose' is true, so make sure they go out at the right
916 gdb_flush (gdb_stdout);
918 if (objfile->sf == NULL)
919 return objfile; /* No symbols. */
921 new_symfile_objfile (objfile, mainline, from_tty);
923 if (target_new_objfile_hook)
924 target_new_objfile_hook (objfile);
929 /* Call symbol_file_add() with default values and update whatever is
930 affected by the loading of a new main().
931 Used when the file is supplied in the gdb command line
932 and by some targets with special loading requirements.
933 The auxiliary function, symbol_file_add_main_1(), has the flags
934 argument for the switches that can only be specified in the symbol_file
938 symbol_file_add_main (char *args, int from_tty)
940 symbol_file_add_main_1 (args, from_tty, 0);
944 symbol_file_add_main_1 (char *args, int from_tty, int flags)
946 symbol_file_add (args, from_tty, NULL, 1, flags);
949 RESET_HP_UX_GLOBALS ();
952 /* Getting new symbols may change our opinion about
953 what is frameless. */
954 reinit_frame_cache ();
956 set_initial_language ();
960 symbol_file_clear (int from_tty)
962 if ((have_full_symbols () || have_partial_symbols ())
964 && !query ("Discard symbol table from `%s'? ",
965 symfile_objfile->name))
966 error ("Not confirmed.");
967 free_all_objfiles ();
969 /* solib descriptors may have handles to objfiles. Since their
970 storage has just been released, we'd better wipe the solib
973 #if defined(SOLIB_RESTART)
977 symfile_objfile = NULL;
979 printf_unfiltered ("No symbol file now.\n");
981 RESET_HP_UX_GLOBALS ();
985 /* This is the symbol-file command. Read the file, analyze its
986 symbols, and add a struct symtab to a symtab list. The syntax of
987 the command is rather bizarre--(1) buildargv implements various
988 quoting conventions which are undocumented and have little or
989 nothing in common with the way things are quoted (or not quoted)
990 elsewhere in GDB, (2) options are used, which are not generally
991 used in GDB (perhaps "set mapped on", "set readnow on" would be
992 better), (3) the order of options matters, which is contrary to GNU
993 conventions (because it is confusing and inconvenient). */
994 /* Note: ezannoni 2000-04-17. This function used to have support for
995 rombug (see remote-os9k.c). It consisted of a call to target_link()
996 (target.c) to get the address of the text segment from the target,
997 and pass that to symbol_file_add(). This is no longer supported. */
1000 symbol_file_command (char *args, int from_tty)
1004 struct cleanup *cleanups;
1005 int flags = OBJF_USERLOADED;
1011 symbol_file_clear (from_tty);
1015 if ((argv = buildargv (args)) == NULL)
1019 cleanups = make_cleanup_freeargv (argv);
1020 while (*argv != NULL)
1022 if (STREQ (*argv, "-mapped"))
1023 flags |= OBJF_MAPPED;
1025 if (STREQ (*argv, "-readnow"))
1026 flags |= OBJF_READNOW;
1029 error ("unknown option `%s'", *argv);
1034 symbol_file_add_main_1 (name, from_tty, flags);
1041 error ("no symbol file name was specified");
1043 do_cleanups (cleanups);
1047 /* Set the initial language.
1049 A better solution would be to record the language in the psymtab when reading
1050 partial symbols, and then use it (if known) to set the language. This would
1051 be a win for formats that encode the language in an easily discoverable place,
1052 such as DWARF. For stabs, we can jump through hoops looking for specially
1053 named symbols or try to intuit the language from the specific type of stabs
1054 we find, but we can't do that until later when we read in full symbols.
1058 set_initial_language (void)
1060 struct partial_symtab *pst;
1061 enum language lang = language_unknown;
1063 pst = find_main_psymtab ();
1066 if (pst->filename != NULL)
1068 lang = deduce_language_from_filename (pst->filename);
1070 if (lang == language_unknown)
1072 /* Make C the default language */
1075 set_language (lang);
1076 expected_language = current_language; /* Don't warn the user */
1080 /* Open file specified by NAME and hand it off to BFD for preliminary
1081 analysis. Result is a newly initialized bfd *, which includes a newly
1082 malloc'd` copy of NAME (tilde-expanded and made absolute).
1083 In case of trouble, error() is called. */
1086 symfile_bfd_open (char *name)
1090 char *absolute_name;
1094 name = tilde_expand (name); /* Returns 1st new malloc'd copy */
1096 /* Look down path for it, allocate 2nd new malloc'd copy. */
1097 desc = openp (getenv ("PATH"), 1, name, O_RDONLY | O_BINARY, 0, &absolute_name);
1098 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1101 char *exename = alloca (strlen (name) + 5);
1102 strcat (strcpy (exename, name), ".exe");
1103 desc = openp (getenv ("PATH"), 1, exename, O_RDONLY | O_BINARY,
1109 make_cleanup (xfree, name);
1110 perror_with_name (name);
1112 xfree (name); /* Free 1st new malloc'd copy */
1113 name = absolute_name; /* Keep 2nd malloc'd copy in bfd */
1114 /* It'll be freed in free_objfile(). */
1116 sym_bfd = bfd_fdopenr (name, gnutarget, desc);
1120 make_cleanup (xfree, name);
1121 error ("\"%s\": can't open to read symbols: %s.", name,
1122 bfd_errmsg (bfd_get_error ()));
1124 sym_bfd->cacheable = 1;
1126 if (!bfd_check_format (sym_bfd, bfd_object))
1128 /* FIXME: should be checking for errors from bfd_close (for one thing,
1129 on error it does not free all the storage associated with the
1131 bfd_close (sym_bfd); /* This also closes desc */
1132 make_cleanup (xfree, name);
1133 error ("\"%s\": can't read symbols: %s.", name,
1134 bfd_errmsg (bfd_get_error ()));
1139 /* Return the section index for the given section name. Return -1 if
1140 the section was not found. */
1142 get_section_index (struct objfile *objfile, char *section_name)
1144 asection *sect = bfd_get_section_by_name (objfile->obfd, section_name);
1151 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1152 startup by the _initialize routine in each object file format reader,
1153 to register information about each format the the reader is prepared
1157 add_symtab_fns (struct sym_fns *sf)
1159 sf->next = symtab_fns;
1164 /* Initialize to read symbols from the symbol file sym_bfd. It either
1165 returns or calls error(). The result is an initialized struct sym_fns
1166 in the objfile structure, that contains cached information about the
1170 find_sym_fns (struct objfile *objfile)
1173 enum bfd_flavour our_flavour = bfd_get_flavour (objfile->obfd);
1174 char *our_target = bfd_get_target (objfile->obfd);
1176 if (our_flavour == bfd_target_srec_flavour
1177 || our_flavour == bfd_target_ihex_flavour
1178 || our_flavour == bfd_target_tekhex_flavour)
1179 return; /* No symbols. */
1181 /* Special kludge for apollo. See dstread.c. */
1182 if (STREQN (our_target, "apollo", 6))
1183 our_flavour = (enum bfd_flavour) -2;
1185 for (sf = symtab_fns; sf != NULL; sf = sf->next)
1187 if (our_flavour == sf->sym_flavour)
1193 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
1194 bfd_get_target (objfile->obfd));
1197 /* This function runs the load command of our current target. */
1200 load_command (char *arg, int from_tty)
1203 arg = get_exec_file (1);
1204 target_load (arg, from_tty);
1206 /* After re-loading the executable, we don't really know which
1207 overlays are mapped any more. */
1208 overlay_cache_invalid = 1;
1211 /* This version of "load" should be usable for any target. Currently
1212 it is just used for remote targets, not inftarg.c or core files,
1213 on the theory that only in that case is it useful.
1215 Avoiding xmodem and the like seems like a win (a) because we don't have
1216 to worry about finding it, and (b) On VMS, fork() is very slow and so
1217 we don't want to run a subprocess. On the other hand, I'm not sure how
1218 performance compares. */
1220 static int download_write_size = 512;
1221 static int validate_download = 0;
1223 /* Callback service function for generic_load (bfd_map_over_sections). */
1226 add_section_size_callback (bfd *abfd, asection *asec, void *data)
1228 bfd_size_type *sum = data;
1230 *sum += bfd_get_section_size_before_reloc (asec);
1233 /* Opaque data for load_section_callback. */
1234 struct load_section_data {
1235 unsigned long load_offset;
1236 unsigned long write_count;
1237 unsigned long data_count;
1238 bfd_size_type total_size;
1241 /* Callback service function for generic_load (bfd_map_over_sections). */
1244 load_section_callback (bfd *abfd, asection *asec, void *data)
1246 struct load_section_data *args = data;
1248 if (bfd_get_section_flags (abfd, asec) & SEC_LOAD)
1250 bfd_size_type size = bfd_get_section_size_before_reloc (asec);
1254 struct cleanup *old_chain;
1255 CORE_ADDR lma = bfd_section_lma (abfd, asec) + args->load_offset;
1256 bfd_size_type block_size;
1258 const char *sect_name = bfd_get_section_name (abfd, asec);
1261 if (download_write_size > 0 && size > download_write_size)
1262 block_size = download_write_size;
1266 buffer = xmalloc (size);
1267 old_chain = make_cleanup (xfree, buffer);
1269 /* Is this really necessary? I guess it gives the user something
1270 to look at during a long download. */
1271 ui_out_message (uiout, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1272 sect_name, paddr_nz (size), paddr_nz (lma));
1274 bfd_get_section_contents (abfd, asec, buffer, 0, size);
1280 bfd_size_type this_transfer = size - sent;
1282 if (this_transfer >= block_size)
1283 this_transfer = block_size;
1284 len = target_write_memory_partial (lma, buffer,
1285 this_transfer, &err);
1288 if (validate_download)
1290 /* Broken memories and broken monitors manifest
1291 themselves here when bring new computers to
1292 life. This doubles already slow downloads. */
1293 /* NOTE: cagney/1999-10-18: A more efficient
1294 implementation might add a verify_memory()
1295 method to the target vector and then use
1296 that. remote.c could implement that method
1297 using the ``qCRC'' packet. */
1298 char *check = xmalloc (len);
1299 struct cleanup *verify_cleanups =
1300 make_cleanup (xfree, check);
1302 if (target_read_memory (lma, check, len) != 0)
1303 error ("Download verify read failed at 0x%s",
1305 if (memcmp (buffer, check, len) != 0)
1306 error ("Download verify compare failed at 0x%s",
1308 do_cleanups (verify_cleanups);
1310 args->data_count += len;
1313 args->write_count += 1;
1316 || (ui_load_progress_hook != NULL
1317 && ui_load_progress_hook (sect_name, sent)))
1318 error ("Canceled the download");
1320 if (show_load_progress != NULL)
1321 show_load_progress (sect_name, sent, size,
1322 args->data_count, args->total_size);
1324 while (sent < size);
1327 error ("Memory access error while loading section %s.", sect_name);
1329 do_cleanups (old_chain);
1335 generic_load (char *args, int from_tty)
1339 time_t start_time, end_time; /* Start and end times of download */
1341 struct cleanup *old_cleanups;
1343 struct load_section_data cbdata;
1346 cbdata.load_offset = 0; /* Offset to add to vma for each section. */
1347 cbdata.write_count = 0; /* Number of writes needed. */
1348 cbdata.data_count = 0; /* Number of bytes written to target memory. */
1349 cbdata.total_size = 0; /* Total size of all bfd sectors. */
1351 /* Parse the input argument - the user can specify a load offset as
1352 a second argument. */
1353 filename = xmalloc (strlen (args) + 1);
1354 old_cleanups = make_cleanup (xfree, filename);
1355 strcpy (filename, args);
1356 offptr = strchr (filename, ' ');
1361 cbdata.load_offset = strtoul (offptr, &endptr, 0);
1362 if (offptr == endptr)
1363 error ("Invalid download offset:%s\n", offptr);
1367 cbdata.load_offset = 0;
1369 /* Open the file for loading. */
1370 loadfile_bfd = bfd_openr (filename, gnutarget);
1371 if (loadfile_bfd == NULL)
1373 perror_with_name (filename);
1377 /* FIXME: should be checking for errors from bfd_close (for one thing,
1378 on error it does not free all the storage associated with the
1380 make_cleanup_bfd_close (loadfile_bfd);
1382 if (!bfd_check_format (loadfile_bfd, bfd_object))
1384 error ("\"%s\" is not an object file: %s", filename,
1385 bfd_errmsg (bfd_get_error ()));
1388 bfd_map_over_sections (loadfile_bfd, add_section_size_callback,
1389 (void *) &cbdata.total_size);
1391 start_time = time (NULL);
1393 bfd_map_over_sections (loadfile_bfd, load_section_callback, &cbdata);
1395 end_time = time (NULL);
1397 entry = bfd_get_start_address (loadfile_bfd);
1398 ui_out_text (uiout, "Start address ");
1399 ui_out_field_fmt (uiout, "address", "0x%s", paddr_nz (entry));
1400 ui_out_text (uiout, ", load size ");
1401 ui_out_field_fmt (uiout, "load-size", "%lu", cbdata.data_count);
1402 ui_out_text (uiout, "\n");
1403 /* We were doing this in remote-mips.c, I suspect it is right
1404 for other targets too. */
1407 /* FIXME: are we supposed to call symbol_file_add or not? According to
1408 a comment from remote-mips.c (where a call to symbol_file_add was
1409 commented out), making the call confuses GDB if more than one file is
1410 loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c
1413 print_transfer_performance (gdb_stdout, cbdata.data_count,
1414 cbdata.write_count, end_time - start_time);
1416 do_cleanups (old_cleanups);
1419 /* Report how fast the transfer went. */
1421 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1422 replaced by print_transfer_performance (with a very different
1423 function signature). */
1426 report_transfer_performance (unsigned long data_count, time_t start_time,
1429 print_transfer_performance (gdb_stdout, data_count,
1430 end_time - start_time, 0);
1434 print_transfer_performance (struct ui_file *stream,
1435 unsigned long data_count,
1436 unsigned long write_count,
1437 unsigned long time_count)
1439 ui_out_text (uiout, "Transfer rate: ");
1442 ui_out_field_fmt (uiout, "transfer-rate", "%lu",
1443 (data_count * 8) / time_count);
1444 ui_out_text (uiout, " bits/sec");
1448 ui_out_field_fmt (uiout, "transferred-bits", "%lu", (data_count * 8));
1449 ui_out_text (uiout, " bits in <1 sec");
1451 if (write_count > 0)
1453 ui_out_text (uiout, ", ");
1454 ui_out_field_fmt (uiout, "write-rate", "%lu", data_count / write_count);
1455 ui_out_text (uiout, " bytes/write");
1457 ui_out_text (uiout, ".\n");
1460 /* This function allows the addition of incrementally linked object files.
1461 It does not modify any state in the target, only in the debugger. */
1462 /* Note: ezannoni 2000-04-13 This function/command used to have a
1463 special case syntax for the rombug target (Rombug is the boot
1464 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
1465 rombug case, the user doesn't need to supply a text address,
1466 instead a call to target_link() (in target.c) would supply the
1467 value to use. We are now discontinuing this type of ad hoc syntax. */
1471 add_symbol_file_command (char *args, int from_tty)
1473 char *filename = NULL;
1474 int flags = OBJF_USERLOADED;
1476 int expecting_option = 0;
1477 int section_index = 0;
1481 int expecting_sec_name = 0;
1482 int expecting_sec_addr = 0;
1488 } sect_opts[SECT_OFF_MAX];
1490 struct section_addr_info section_addrs;
1491 struct cleanup *my_cleanups = make_cleanup (null_cleanup, NULL);
1496 error ("add-symbol-file takes a file name and an address");
1498 /* Make a copy of the string that we can safely write into. */
1499 args = xstrdup (args);
1501 /* Ensure section_addrs is initialized */
1502 memset (§ion_addrs, 0, sizeof (section_addrs));
1504 while (*args != '\000')
1506 /* Any leading spaces? */
1507 while (isspace (*args))
1510 /* Point arg to the beginning of the argument. */
1513 /* Move args pointer over the argument. */
1514 while ((*args != '\000') && !isspace (*args))
1517 /* If there are more arguments, terminate arg and
1519 if (*args != '\000')
1522 /* Now process the argument. */
1525 /* The first argument is the file name. */
1526 filename = tilde_expand (arg);
1527 make_cleanup (xfree, filename);
1532 /* The second argument is always the text address at which
1533 to load the program. */
1534 sect_opts[section_index].name = ".text";
1535 sect_opts[section_index].value = arg;
1540 /* It's an option (starting with '-') or it's an argument
1545 if (strcmp (arg, "-mapped") == 0)
1546 flags |= OBJF_MAPPED;
1548 if (strcmp (arg, "-readnow") == 0)
1549 flags |= OBJF_READNOW;
1551 if (strcmp (arg, "-s") == 0)
1553 if (section_index >= SECT_OFF_MAX)
1554 error ("Too many sections specified.");
1555 expecting_sec_name = 1;
1556 expecting_sec_addr = 1;
1561 if (expecting_sec_name)
1563 sect_opts[section_index].name = arg;
1564 expecting_sec_name = 0;
1567 if (expecting_sec_addr)
1569 sect_opts[section_index].value = arg;
1570 expecting_sec_addr = 0;
1574 error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*");
1580 /* Print the prompt for the query below. And save the arguments into
1581 a sect_addr_info structure to be passed around to other
1582 functions. We have to split this up into separate print
1583 statements because local_hex_string returns a local static
1586 printf_filtered ("add symbol table from file \"%s\" at\n", filename);
1587 for (i = 0; i < section_index; i++)
1590 char *val = sect_opts[i].value;
1591 char *sec = sect_opts[i].name;
1593 val = sect_opts[i].value;
1594 if (val[0] == '0' && val[1] == 'x')
1595 addr = strtoul (val+2, NULL, 16);
1597 addr = strtoul (val, NULL, 10);
1599 /* Here we store the section offsets in the order they were
1600 entered on the command line. */
1601 section_addrs.other[sec_num].name = sec;
1602 section_addrs.other[sec_num].addr = addr;
1603 printf_filtered ("\t%s_addr = %s\n",
1605 local_hex_string ((unsigned long)addr));
1608 /* The object's sections are initialized when a
1609 call is made to build_objfile_section_table (objfile).
1610 This happens in reread_symbols.
1611 At this point, we don't know what file type this is,
1612 so we can't determine what section names are valid. */
1615 if (from_tty && (!query ("%s", "")))
1616 error ("Not confirmed.");
1618 symbol_file_add (filename, from_tty, §ion_addrs, 0, flags);
1620 /* Getting new symbols may change our opinion about what is
1622 reinit_frame_cache ();
1623 do_cleanups (my_cleanups);
1627 add_shared_symbol_files_command (char *args, int from_tty)
1629 #ifdef ADD_SHARED_SYMBOL_FILES
1630 ADD_SHARED_SYMBOL_FILES (args, from_tty);
1632 error ("This command is not available in this configuration of GDB.");
1636 /* Re-read symbols if a symbol-file has changed. */
1638 reread_symbols (void)
1640 struct objfile *objfile;
1643 struct stat new_statbuf;
1646 /* With the addition of shared libraries, this should be modified,
1647 the load time should be saved in the partial symbol tables, since
1648 different tables may come from different source files. FIXME.
1649 This routine should then walk down each partial symbol table
1650 and see if the symbol table that it originates from has been changed */
1652 for (objfile = object_files; objfile; objfile = objfile->next)
1656 #ifdef IBM6000_TARGET
1657 /* If this object is from a shared library, then you should
1658 stat on the library name, not member name. */
1660 if (objfile->obfd->my_archive)
1661 res = stat (objfile->obfd->my_archive->filename, &new_statbuf);
1664 res = stat (objfile->name, &new_statbuf);
1667 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1668 printf_filtered ("`%s' has disappeared; keeping its symbols.\n",
1672 new_modtime = new_statbuf.st_mtime;
1673 if (new_modtime != objfile->mtime)
1675 struct cleanup *old_cleanups;
1676 struct section_offsets *offsets;
1678 char *obfd_filename;
1680 printf_filtered ("`%s' has changed; re-reading symbols.\n",
1683 /* There are various functions like symbol_file_add,
1684 symfile_bfd_open, syms_from_objfile, etc., which might
1685 appear to do what we want. But they have various other
1686 effects which we *don't* want. So we just do stuff
1687 ourselves. We don't worry about mapped files (for one thing,
1688 any mapped file will be out of date). */
1690 /* If we get an error, blow away this objfile (not sure if
1691 that is the correct response for things like shared
1693 old_cleanups = make_cleanup_free_objfile (objfile);
1694 /* We need to do this whenever any symbols go away. */
1695 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
1697 /* Clean up any state BFD has sitting around. We don't need
1698 to close the descriptor but BFD lacks a way of closing the
1699 BFD without closing the descriptor. */
1700 obfd_filename = bfd_get_filename (objfile->obfd);
1701 if (!bfd_close (objfile->obfd))
1702 error ("Can't close BFD for %s: %s", objfile->name,
1703 bfd_errmsg (bfd_get_error ()));
1704 objfile->obfd = bfd_openr (obfd_filename, gnutarget);
1705 if (objfile->obfd == NULL)
1706 error ("Can't open %s to read symbols.", objfile->name);
1707 /* bfd_openr sets cacheable to true, which is what we want. */
1708 if (!bfd_check_format (objfile->obfd, bfd_object))
1709 error ("Can't read symbols from %s: %s.", objfile->name,
1710 bfd_errmsg (bfd_get_error ()));
1712 /* Save the offsets, we will nuke them with the rest of the
1714 num_offsets = objfile->num_sections;
1715 offsets = (struct section_offsets *) alloca (SIZEOF_SECTION_OFFSETS);
1716 memcpy (offsets, objfile->section_offsets, SIZEOF_SECTION_OFFSETS);
1718 /* Nuke all the state that we will re-read. Much of the following
1719 code which sets things to NULL really is necessary to tell
1720 other parts of GDB that there is nothing currently there. */
1722 /* FIXME: Do we have to free a whole linked list, or is this
1724 if (objfile->global_psymbols.list)
1725 xmfree (objfile->md, objfile->global_psymbols.list);
1726 memset (&objfile->global_psymbols, 0,
1727 sizeof (objfile->global_psymbols));
1728 if (objfile->static_psymbols.list)
1729 xmfree (objfile->md, objfile->static_psymbols.list);
1730 memset (&objfile->static_psymbols, 0,
1731 sizeof (objfile->static_psymbols));
1733 /* Free the obstacks for non-reusable objfiles */
1734 bcache_xfree (objfile->psymbol_cache);
1735 objfile->psymbol_cache = bcache_xmalloc ();
1736 bcache_xfree (objfile->macro_cache);
1737 objfile->macro_cache = bcache_xmalloc ();
1738 obstack_free (&objfile->psymbol_obstack, 0);
1739 obstack_free (&objfile->symbol_obstack, 0);
1740 obstack_free (&objfile->type_obstack, 0);
1741 objfile->sections = NULL;
1742 objfile->symtabs = NULL;
1743 objfile->psymtabs = NULL;
1744 objfile->free_psymtabs = NULL;
1745 objfile->msymbols = NULL;
1746 objfile->minimal_symbol_count = 0;
1747 memset (&objfile->msymbol_hash, 0,
1748 sizeof (objfile->msymbol_hash));
1749 memset (&objfile->msymbol_demangled_hash, 0,
1750 sizeof (objfile->msymbol_demangled_hash));
1751 objfile->fundamental_types = NULL;
1752 if (objfile->sf != NULL)
1754 (*objfile->sf->sym_finish) (objfile);
1757 /* We never make this a mapped file. */
1759 /* obstack_specify_allocation also initializes the obstack so
1761 objfile->psymbol_cache = bcache_xmalloc ();
1762 objfile->macro_cache = bcache_xmalloc ();
1763 obstack_specify_allocation (&objfile->psymbol_obstack, 0, 0,
1765 obstack_specify_allocation (&objfile->symbol_obstack, 0, 0,
1767 obstack_specify_allocation (&objfile->type_obstack, 0, 0,
1769 if (build_objfile_section_table (objfile))
1771 error ("Can't find the file sections in `%s': %s",
1772 objfile->name, bfd_errmsg (bfd_get_error ()));
1775 /* We use the same section offsets as from last time. I'm not
1776 sure whether that is always correct for shared libraries. */
1777 objfile->section_offsets = (struct section_offsets *)
1778 obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS);
1779 memcpy (objfile->section_offsets, offsets, SIZEOF_SECTION_OFFSETS);
1780 objfile->num_sections = num_offsets;
1782 /* What the hell is sym_new_init for, anyway? The concept of
1783 distinguishing between the main file and additional files
1784 in this way seems rather dubious. */
1785 if (objfile == symfile_objfile)
1787 (*objfile->sf->sym_new_init) (objfile);
1789 RESET_HP_UX_GLOBALS ();
1793 (*objfile->sf->sym_init) (objfile);
1794 clear_complaints (&symfile_complaints, 1, 1);
1795 /* The "mainline" parameter is a hideous hack; I think leaving it
1796 zero is OK since dbxread.c also does what it needs to do if
1797 objfile->global_psymbols.size is 0. */
1798 (*objfile->sf->sym_read) (objfile, 0);
1799 if (!have_partial_symbols () && !have_full_symbols ())
1802 printf_filtered ("(no debugging symbols found)\n");
1805 objfile->flags |= OBJF_SYMS;
1807 /* We're done reading the symbol file; finish off complaints. */
1808 clear_complaints (&symfile_complaints, 0, 1);
1810 /* Getting new symbols may change our opinion about what is
1813 reinit_frame_cache ();
1815 /* Discard cleanups as symbol reading was successful. */
1816 discard_cleanups (old_cleanups);
1818 /* If the mtime has changed between the time we set new_modtime
1819 and now, we *want* this to be out of date, so don't call stat
1821 objfile->mtime = new_modtime;
1824 /* Call this after reading in a new symbol table to give target
1825 dependent code a crack at the new symbols. For instance, this
1826 could be used to update the values of target-specific symbols GDB
1827 needs to keep track of (such as _sigtramp, or whatever). */
1829 TARGET_SYMFILE_POSTREAD (objfile);
1835 clear_symtab_users ();
1847 static filename_language *filename_language_table;
1848 static int fl_table_size, fl_table_next;
1851 add_filename_language (char *ext, enum language lang)
1853 if (fl_table_next >= fl_table_size)
1855 fl_table_size += 10;
1856 filename_language_table =
1857 xrealloc (filename_language_table,
1858 fl_table_size * sizeof (*filename_language_table));
1861 filename_language_table[fl_table_next].ext = xstrdup (ext);
1862 filename_language_table[fl_table_next].lang = lang;
1866 static char *ext_args;
1869 set_ext_lang_command (char *args, int from_tty)
1872 char *cp = ext_args;
1875 /* First arg is filename extension, starting with '.' */
1877 error ("'%s': Filename extension must begin with '.'", ext_args);
1879 /* Find end of first arg. */
1880 while (*cp && !isspace (*cp))
1884 error ("'%s': two arguments required -- filename extension and language",
1887 /* Null-terminate first arg */
1890 /* Find beginning of second arg, which should be a source language. */
1891 while (*cp && isspace (*cp))
1895 error ("'%s': two arguments required -- filename extension and language",
1898 /* Lookup the language from among those we know. */
1899 lang = language_enum (cp);
1901 /* Now lookup the filename extension: do we already know it? */
1902 for (i = 0; i < fl_table_next; i++)
1903 if (0 == strcmp (ext_args, filename_language_table[i].ext))
1906 if (i >= fl_table_next)
1908 /* new file extension */
1909 add_filename_language (ext_args, lang);
1913 /* redefining a previously known filename extension */
1916 /* query ("Really make files of type %s '%s'?", */
1917 /* ext_args, language_str (lang)); */
1919 xfree (filename_language_table[i].ext);
1920 filename_language_table[i].ext = xstrdup (ext_args);
1921 filename_language_table[i].lang = lang;
1926 info_ext_lang_command (char *args, int from_tty)
1930 printf_filtered ("Filename extensions and the languages they represent:");
1931 printf_filtered ("\n\n");
1932 for (i = 0; i < fl_table_next; i++)
1933 printf_filtered ("\t%s\t- %s\n",
1934 filename_language_table[i].ext,
1935 language_str (filename_language_table[i].lang));
1939 init_filename_language_table (void)
1941 if (fl_table_size == 0) /* protect against repetition */
1945 filename_language_table =
1946 xmalloc (fl_table_size * sizeof (*filename_language_table));
1947 add_filename_language (".c", language_c);
1948 add_filename_language (".C", language_cplus);
1949 add_filename_language (".cc", language_cplus);
1950 add_filename_language (".cp", language_cplus);
1951 add_filename_language (".cpp", language_cplus);
1952 add_filename_language (".cxx", language_cplus);
1953 add_filename_language (".c++", language_cplus);
1954 add_filename_language (".java", language_java);
1955 add_filename_language (".class", language_java);
1956 /* OBSOLETE add_filename_language (".ch", language_chill); */
1957 /* OBSOLETE add_filename_language (".c186", language_chill); */
1958 /* OBSOLETE add_filename_language (".c286", language_chill); */
1959 add_filename_language (".m", language_objc);
1960 add_filename_language (".f", language_fortran);
1961 add_filename_language (".F", language_fortran);
1962 add_filename_language (".s", language_asm);
1963 add_filename_language (".S", language_asm);
1964 add_filename_language (".pas", language_pascal);
1965 add_filename_language (".p", language_pascal);
1966 add_filename_language (".pp", language_pascal);
1971 deduce_language_from_filename (char *filename)
1976 if (filename != NULL)
1977 if ((cp = strrchr (filename, '.')) != NULL)
1978 for (i = 0; i < fl_table_next; i++)
1979 if (strcmp (cp, filename_language_table[i].ext) == 0)
1980 return filename_language_table[i].lang;
1982 return language_unknown;
1987 Allocate and partly initialize a new symbol table. Return a pointer
1988 to it. error() if no space.
1990 Caller must set these fields:
1996 possibly free_named_symtabs (symtab->filename);
2000 allocate_symtab (char *filename, struct objfile *objfile)
2002 register struct symtab *symtab;
2004 symtab = (struct symtab *)
2005 obstack_alloc (&objfile->symbol_obstack, sizeof (struct symtab));
2006 memset (symtab, 0, sizeof (*symtab));
2007 symtab->filename = obsavestring (filename, strlen (filename),
2008 &objfile->symbol_obstack);
2009 symtab->fullname = NULL;
2010 symtab->language = deduce_language_from_filename (filename);
2011 symtab->debugformat = obsavestring ("unknown", 7,
2012 &objfile->symbol_obstack);
2014 /* Hook it to the objfile it comes from */
2016 symtab->objfile = objfile;
2017 symtab->next = objfile->symtabs;
2018 objfile->symtabs = symtab;
2020 /* FIXME: This should go away. It is only defined for the Z8000,
2021 and the Z8000 definition of this macro doesn't have anything to
2022 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
2023 here for convenience. */
2024 #ifdef INIT_EXTRA_SYMTAB_INFO
2025 INIT_EXTRA_SYMTAB_INFO (symtab);
2031 struct partial_symtab *
2032 allocate_psymtab (char *filename, struct objfile *objfile)
2034 struct partial_symtab *psymtab;
2036 if (objfile->free_psymtabs)
2038 psymtab = objfile->free_psymtabs;
2039 objfile->free_psymtabs = psymtab->next;
2042 psymtab = (struct partial_symtab *)
2043 obstack_alloc (&objfile->psymbol_obstack,
2044 sizeof (struct partial_symtab));
2046 memset (psymtab, 0, sizeof (struct partial_symtab));
2047 psymtab->filename = obsavestring (filename, strlen (filename),
2048 &objfile->psymbol_obstack);
2049 psymtab->symtab = NULL;
2051 /* Prepend it to the psymtab list for the objfile it belongs to.
2052 Psymtabs are searched in most recent inserted -> least recent
2055 psymtab->objfile = objfile;
2056 psymtab->next = objfile->psymtabs;
2057 objfile->psymtabs = psymtab;
2060 struct partial_symtab **prev_pst;
2061 psymtab->objfile = objfile;
2062 psymtab->next = NULL;
2063 prev_pst = &(objfile->psymtabs);
2064 while ((*prev_pst) != NULL)
2065 prev_pst = &((*prev_pst)->next);
2066 (*prev_pst) = psymtab;
2074 discard_psymtab (struct partial_symtab *pst)
2076 struct partial_symtab **prev_pst;
2079 Empty psymtabs happen as a result of header files which don't
2080 have any symbols in them. There can be a lot of them. But this
2081 check is wrong, in that a psymtab with N_SLINE entries but
2082 nothing else is not empty, but we don't realize that. Fixing
2083 that without slowing things down might be tricky. */
2085 /* First, snip it out of the psymtab chain */
2087 prev_pst = &(pst->objfile->psymtabs);
2088 while ((*prev_pst) != pst)
2089 prev_pst = &((*prev_pst)->next);
2090 (*prev_pst) = pst->next;
2092 /* Next, put it on a free list for recycling */
2094 pst->next = pst->objfile->free_psymtabs;
2095 pst->objfile->free_psymtabs = pst;
2099 /* Reset all data structures in gdb which may contain references to symbol
2103 clear_symtab_users (void)
2105 /* Someday, we should do better than this, by only blowing away
2106 the things that really need to be blown. */
2107 clear_value_history ();
2109 clear_internalvars ();
2110 breakpoint_re_set ();
2111 set_default_breakpoint (0, 0, 0, 0);
2112 clear_current_source_symtab_and_line ();
2113 clear_pc_function_cache ();
2114 if (target_new_objfile_hook)
2115 target_new_objfile_hook (NULL);
2119 clear_symtab_users_cleanup (void *ignore)
2121 clear_symtab_users ();
2124 /* clear_symtab_users_once:
2126 This function is run after symbol reading, or from a cleanup.
2127 If an old symbol table was obsoleted, the old symbol table
2128 has been blown away, but the other GDB data structures that may
2129 reference it have not yet been cleared or re-directed. (The old
2130 symtab was zapped, and the cleanup queued, in free_named_symtab()
2133 This function can be queued N times as a cleanup, or called
2134 directly; it will do all the work the first time, and then will be a
2135 no-op until the next time it is queued. This works by bumping a
2136 counter at queueing time. Much later when the cleanup is run, or at
2137 the end of symbol processing (in case the cleanup is discarded), if
2138 the queued count is greater than the "done-count", we do the work
2139 and set the done-count to the queued count. If the queued count is
2140 less than or equal to the done-count, we just ignore the call. This
2141 is needed because reading a single .o file will often replace many
2142 symtabs (one per .h file, for example), and we don't want to reset
2143 the breakpoints N times in the user's face.
2145 The reason we both queue a cleanup, and call it directly after symbol
2146 reading, is because the cleanup protects us in case of errors, but is
2147 discarded if symbol reading is successful. */
2150 /* FIXME: As free_named_symtabs is currently a big noop this function
2151 is no longer needed. */
2152 static void clear_symtab_users_once (void);
2154 static int clear_symtab_users_queued;
2155 static int clear_symtab_users_done;
2158 clear_symtab_users_once (void)
2160 /* Enforce once-per-`do_cleanups'-semantics */
2161 if (clear_symtab_users_queued <= clear_symtab_users_done)
2163 clear_symtab_users_done = clear_symtab_users_queued;
2165 clear_symtab_users ();
2169 /* Delete the specified psymtab, and any others that reference it. */
2172 cashier_psymtab (struct partial_symtab *pst)
2174 struct partial_symtab *ps, *pprev = NULL;
2177 /* Find its previous psymtab in the chain */
2178 for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
2187 /* Unhook it from the chain. */
2188 if (ps == pst->objfile->psymtabs)
2189 pst->objfile->psymtabs = ps->next;
2191 pprev->next = ps->next;
2193 /* FIXME, we can't conveniently deallocate the entries in the
2194 partial_symbol lists (global_psymbols/static_psymbols) that
2195 this psymtab points to. These just take up space until all
2196 the psymtabs are reclaimed. Ditto the dependencies list and
2197 filename, which are all in the psymbol_obstack. */
2199 /* We need to cashier any psymtab that has this one as a dependency... */
2201 for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
2203 for (i = 0; i < ps->number_of_dependencies; i++)
2205 if (ps->dependencies[i] == pst)
2207 cashier_psymtab (ps);
2208 goto again; /* Must restart, chain has been munged. */
2215 /* If a symtab or psymtab for filename NAME is found, free it along
2216 with any dependent breakpoints, displays, etc.
2217 Used when loading new versions of object modules with the "add-file"
2218 command. This is only called on the top-level symtab or psymtab's name;
2219 it is not called for subsidiary files such as .h files.
2221 Return value is 1 if we blew away the environment, 0 if not.
2222 FIXME. The return value appears to never be used.
2224 FIXME. I think this is not the best way to do this. We should
2225 work on being gentler to the environment while still cleaning up
2226 all stray pointers into the freed symtab. */
2229 free_named_symtabs (char *name)
2232 /* FIXME: With the new method of each objfile having it's own
2233 psymtab list, this function needs serious rethinking. In particular,
2234 why was it ever necessary to toss psymtabs with specific compilation
2235 unit filenames, as opposed to all psymtabs from a particular symbol
2237 Well, the answer is that some systems permit reloading of particular
2238 compilation units. We want to blow away any old info about these
2239 compilation units, regardless of which objfiles they arrived in. --gnu. */
2241 register struct symtab *s;
2242 register struct symtab *prev;
2243 register struct partial_symtab *ps;
2244 struct blockvector *bv;
2247 /* We only wack things if the symbol-reload switch is set. */
2248 if (!symbol_reloading)
2251 /* Some symbol formats have trouble providing file names... */
2252 if (name == 0 || *name == '\0')
2255 /* Look for a psymtab with the specified name. */
2258 for (ps = partial_symtab_list; ps; ps = ps->next)
2260 if (STREQ (name, ps->filename))
2262 cashier_psymtab (ps); /* Blow it away...and its little dog, too. */
2263 goto again2; /* Must restart, chain has been munged */
2267 /* Look for a symtab with the specified name. */
2269 for (s = symtab_list; s; s = s->next)
2271 if (STREQ (name, s->filename))
2278 if (s == symtab_list)
2279 symtab_list = s->next;
2281 prev->next = s->next;
2283 /* For now, queue a delete for all breakpoints, displays, etc., whether
2284 or not they depend on the symtab being freed. This should be
2285 changed so that only those data structures affected are deleted. */
2287 /* But don't delete anything if the symtab is empty.
2288 This test is necessary due to a bug in "dbxread.c" that
2289 causes empty symtabs to be created for N_SO symbols that
2290 contain the pathname of the object file. (This problem
2291 has been fixed in GDB 3.9x). */
2293 bv = BLOCKVECTOR (s);
2294 if (BLOCKVECTOR_NBLOCKS (bv) > 2
2295 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK))
2296 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)))
2298 complaint (&symfile_complaints, "Replacing old symbols for `%s'",
2300 clear_symtab_users_queued++;
2301 make_cleanup (clear_symtab_users_once, 0);
2306 complaint (&symfile_complaints, "Empty symbol table found for `%s'",
2314 /* It is still possible that some breakpoints will be affected
2315 even though no symtab was found, since the file might have
2316 been compiled without debugging, and hence not be associated
2317 with a symtab. In order to handle this correctly, we would need
2318 to keep a list of text address ranges for undebuggable files.
2319 For now, we do nothing, since this is a fairly obscure case. */
2323 /* FIXME, what about the minimal symbol table? */
2330 /* Allocate and partially fill a partial symtab. It will be
2331 completely filled at the end of the symbol list.
2333 FILENAME is the name of the symbol-file we are reading from. */
2335 struct partial_symtab *
2336 start_psymtab_common (struct objfile *objfile,
2337 struct section_offsets *section_offsets, char *filename,
2338 CORE_ADDR textlow, struct partial_symbol **global_syms,
2339 struct partial_symbol **static_syms)
2341 struct partial_symtab *psymtab;
2343 psymtab = allocate_psymtab (filename, objfile);
2344 psymtab->section_offsets = section_offsets;
2345 psymtab->textlow = textlow;
2346 psymtab->texthigh = psymtab->textlow; /* default */
2347 psymtab->globals_offset = global_syms - objfile->global_psymbols.list;
2348 psymtab->statics_offset = static_syms - objfile->static_psymbols.list;
2352 /* Add a symbol with a long value to a psymtab.
2353 Since one arg is a struct, we pass in a ptr and deref it (sigh). */
2356 add_psymbol_to_list (char *name, int namelength, namespace_enum namespace,
2357 enum address_class class,
2358 struct psymbol_allocation_list *list, long val, /* Value as a long */
2359 CORE_ADDR coreaddr, /* Value as a CORE_ADDR */
2360 enum language language, struct objfile *objfile)
2362 register struct partial_symbol *psym;
2363 char *buf = alloca (namelength + 1);
2364 /* psymbol is static so that there will be no uninitialized gaps in the
2365 structure which might contain random data, causing cache misses in
2367 static struct partial_symbol psymbol;
2369 /* Create local copy of the partial symbol */
2370 memcpy (buf, name, namelength);
2371 buf[namelength] = '\0';
2372 SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, objfile->psymbol_cache);
2373 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2376 SYMBOL_VALUE (&psymbol) = val;
2380 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
2382 SYMBOL_SECTION (&psymbol) = 0;
2383 SYMBOL_LANGUAGE (&psymbol) = language;
2384 PSYMBOL_NAMESPACE (&psymbol) = namespace;
2385 PSYMBOL_CLASS (&psymbol) = class;
2386 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language);
2388 /* Stash the partial symbol away in the cache */
2389 psym = bcache (&psymbol, sizeof (struct partial_symbol), objfile->psymbol_cache);
2391 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2392 if (list->next >= list->list + list->size)
2394 extend_psymbol_list (list, objfile);
2396 *list->next++ = psym;
2397 OBJSTAT (objfile, n_psyms++);
2400 /* Add a symbol with a long value to a psymtab. This differs from
2401 * add_psymbol_to_list above in taking both a mangled and a demangled
2405 add_psymbol_with_dem_name_to_list (char *name, int namelength, char *dem_name,
2406 int dem_namelength, namespace_enum namespace,
2407 enum address_class class,
2408 struct psymbol_allocation_list *list, long val, /* Value as a long */
2409 CORE_ADDR coreaddr, /* Value as a CORE_ADDR */
2410 enum language language,
2411 struct objfile *objfile)
2413 register struct partial_symbol *psym;
2414 char *buf = alloca (namelength + 1);
2415 /* psymbol is static so that there will be no uninitialized gaps in the
2416 structure which might contain random data, causing cache misses in
2418 static struct partial_symbol psymbol;
2420 /* Create local copy of the partial symbol */
2422 memcpy (buf, name, namelength);
2423 buf[namelength] = '\0';
2424 SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, objfile->psymbol_cache);
2426 buf = alloca (dem_namelength + 1);
2427 memcpy (buf, dem_name, dem_namelength);
2428 buf[dem_namelength] = '\0';
2433 case language_cplus:
2434 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol) =
2435 bcache (buf, dem_namelength + 1, objfile->psymbol_cache);
2437 /* OBSOLETE case language_chill: */
2438 /* OBSOLETE SYMBOL_CHILL_DEMANGLED_NAME (&psymbol) = */
2439 /* OBSOLETE bcache (buf, dem_namelength + 1, objfile->psymbol_cache); */
2441 /* FIXME What should be done for the default case? Ignoring for now. */
2444 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2447 SYMBOL_VALUE (&psymbol) = val;
2451 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
2453 SYMBOL_SECTION (&psymbol) = 0;
2454 SYMBOL_LANGUAGE (&psymbol) = language;
2455 PSYMBOL_NAMESPACE (&psymbol) = namespace;
2456 PSYMBOL_CLASS (&psymbol) = class;
2457 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language);
2459 /* Stash the partial symbol away in the cache */
2460 psym = bcache (&psymbol, sizeof (struct partial_symbol), objfile->psymbol_cache);
2462 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2463 if (list->next >= list->list + list->size)
2465 extend_psymbol_list (list, objfile);
2467 *list->next++ = psym;
2468 OBJSTAT (objfile, n_psyms++);
2471 /* Initialize storage for partial symbols. */
2474 init_psymbol_list (struct objfile *objfile, int total_symbols)
2476 /* Free any previously allocated psymbol lists. */
2478 if (objfile->global_psymbols.list)
2480 xmfree (objfile->md, (PTR) objfile->global_psymbols.list);
2482 if (objfile->static_psymbols.list)
2484 xmfree (objfile->md, (PTR) objfile->static_psymbols.list);
2487 /* Current best guess is that approximately a twentieth
2488 of the total symbols (in a debugging file) are global or static
2491 objfile->global_psymbols.size = total_symbols / 10;
2492 objfile->static_psymbols.size = total_symbols / 10;
2494 if (objfile->global_psymbols.size > 0)
2496 objfile->global_psymbols.next =
2497 objfile->global_psymbols.list = (struct partial_symbol **)
2498 xmmalloc (objfile->md, (objfile->global_psymbols.size
2499 * sizeof (struct partial_symbol *)));
2501 if (objfile->static_psymbols.size > 0)
2503 objfile->static_psymbols.next =
2504 objfile->static_psymbols.list = (struct partial_symbol **)
2505 xmmalloc (objfile->md, (objfile->static_psymbols.size
2506 * sizeof (struct partial_symbol *)));
2511 The following code implements an abstraction for debugging overlay sections.
2513 The target model is as follows:
2514 1) The gnu linker will permit multiple sections to be mapped into the
2515 same VMA, each with its own unique LMA (or load address).
2516 2) It is assumed that some runtime mechanism exists for mapping the
2517 sections, one by one, from the load address into the VMA address.
2518 3) This code provides a mechanism for gdb to keep track of which
2519 sections should be considered to be mapped from the VMA to the LMA.
2520 This information is used for symbol lookup, and memory read/write.
2521 For instance, if a section has been mapped then its contents
2522 should be read from the VMA, otherwise from the LMA.
2524 Two levels of debugger support for overlays are available. One is
2525 "manual", in which the debugger relies on the user to tell it which
2526 overlays are currently mapped. This level of support is
2527 implemented entirely in the core debugger, and the information about
2528 whether a section is mapped is kept in the objfile->obj_section table.
2530 The second level of support is "automatic", and is only available if
2531 the target-specific code provides functionality to read the target's
2532 overlay mapping table, and translate its contents for the debugger
2533 (by updating the mapped state information in the obj_section tables).
2535 The interface is as follows:
2537 overlay map <name> -- tell gdb to consider this section mapped
2538 overlay unmap <name> -- tell gdb to consider this section unmapped
2539 overlay list -- list the sections that GDB thinks are mapped
2540 overlay read-target -- get the target's state of what's mapped
2541 overlay off/manual/auto -- set overlay debugging state
2542 Functional interface:
2543 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2544 section, return that section.
2545 find_pc_overlay(pc): find any overlay section that contains
2546 the pc, either in its VMA or its LMA
2547 overlay_is_mapped(sect): true if overlay is marked as mapped
2548 section_is_overlay(sect): true if section's VMA != LMA
2549 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2550 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2551 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2552 overlay_mapped_address(...): map an address from section's LMA to VMA
2553 overlay_unmapped_address(...): map an address from section's VMA to LMA
2554 symbol_overlayed_address(...): Return a "current" address for symbol:
2555 either in VMA or LMA depending on whether
2556 the symbol's section is currently mapped
2559 /* Overlay debugging state: */
2561 enum overlay_debugging_state overlay_debugging = ovly_off;
2562 int overlay_cache_invalid = 0; /* True if need to refresh mapped state */
2564 /* Target vector for refreshing overlay mapped state */
2565 static void simple_overlay_update (struct obj_section *);
2566 void (*target_overlay_update) (struct obj_section *) = simple_overlay_update;
2568 /* Function: section_is_overlay (SECTION)
2569 Returns true if SECTION has VMA not equal to LMA, ie.
2570 SECTION is loaded at an address different from where it will "run". */
2573 section_is_overlay (asection *section)
2575 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2577 if (overlay_debugging)
2578 if (section && section->lma != 0 &&
2579 section->vma != section->lma)
2585 /* Function: overlay_invalidate_all (void)
2586 Invalidate the mapped state of all overlay sections (mark it as stale). */
2589 overlay_invalidate_all (void)
2591 struct objfile *objfile;
2592 struct obj_section *sect;
2594 ALL_OBJSECTIONS (objfile, sect)
2595 if (section_is_overlay (sect->the_bfd_section))
2596 sect->ovly_mapped = -1;
2599 /* Function: overlay_is_mapped (SECTION)
2600 Returns true if section is an overlay, and is currently mapped.
2601 Private: public access is thru function section_is_mapped.
2603 Access to the ovly_mapped flag is restricted to this function, so
2604 that we can do automatic update. If the global flag
2605 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2606 overlay_invalidate_all. If the mapped state of the particular
2607 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2610 overlay_is_mapped (struct obj_section *osect)
2612 if (osect == 0 || !section_is_overlay (osect->the_bfd_section))
2615 switch (overlay_debugging)
2619 return 0; /* overlay debugging off */
2620 case ovly_auto: /* overlay debugging automatic */
2621 /* Unles there is a target_overlay_update function,
2622 there's really nothing useful to do here (can't really go auto) */
2623 if (target_overlay_update)
2625 if (overlay_cache_invalid)
2627 overlay_invalidate_all ();
2628 overlay_cache_invalid = 0;
2630 if (osect->ovly_mapped == -1)
2631 (*target_overlay_update) (osect);
2633 /* fall thru to manual case */
2634 case ovly_on: /* overlay debugging manual */
2635 return osect->ovly_mapped == 1;
2639 /* Function: section_is_mapped
2640 Returns true if section is an overlay, and is currently mapped. */
2643 section_is_mapped (asection *section)
2645 struct objfile *objfile;
2646 struct obj_section *osect;
2648 if (overlay_debugging)
2649 if (section && section_is_overlay (section))
2650 ALL_OBJSECTIONS (objfile, osect)
2651 if (osect->the_bfd_section == section)
2652 return overlay_is_mapped (osect);
2657 /* Function: pc_in_unmapped_range
2658 If PC falls into the lma range of SECTION, return true, else false. */
2661 pc_in_unmapped_range (CORE_ADDR pc, asection *section)
2663 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2667 if (overlay_debugging)
2668 if (section && section_is_overlay (section))
2670 size = bfd_get_section_size_before_reloc (section);
2671 if (section->lma <= pc && pc < section->lma + size)
2677 /* Function: pc_in_mapped_range
2678 If PC falls into the vma range of SECTION, return true, else false. */
2681 pc_in_mapped_range (CORE_ADDR pc, asection *section)
2683 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2687 if (overlay_debugging)
2688 if (section && section_is_overlay (section))
2690 size = bfd_get_section_size_before_reloc (section);
2691 if (section->vma <= pc && pc < section->vma + size)
2698 /* Return true if the mapped ranges of sections A and B overlap, false
2701 sections_overlap (asection *a, asection *b)
2703 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2705 CORE_ADDR a_start = a->vma;
2706 CORE_ADDR a_end = a->vma + bfd_get_section_size_before_reloc (a);
2707 CORE_ADDR b_start = b->vma;
2708 CORE_ADDR b_end = b->vma + bfd_get_section_size_before_reloc (b);
2710 return (a_start < b_end && b_start < a_end);
2713 /* Function: overlay_unmapped_address (PC, SECTION)
2714 Returns the address corresponding to PC in the unmapped (load) range.
2715 May be the same as PC. */
2718 overlay_unmapped_address (CORE_ADDR pc, asection *section)
2720 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2722 if (overlay_debugging)
2723 if (section && section_is_overlay (section) &&
2724 pc_in_mapped_range (pc, section))
2725 return pc + section->lma - section->vma;
2730 /* Function: overlay_mapped_address (PC, SECTION)
2731 Returns the address corresponding to PC in the mapped (runtime) range.
2732 May be the same as PC. */
2735 overlay_mapped_address (CORE_ADDR pc, asection *section)
2737 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2739 if (overlay_debugging)
2740 if (section && section_is_overlay (section) &&
2741 pc_in_unmapped_range (pc, section))
2742 return pc + section->vma - section->lma;
2748 /* Function: symbol_overlayed_address
2749 Return one of two addresses (relative to the VMA or to the LMA),
2750 depending on whether the section is mapped or not. */
2753 symbol_overlayed_address (CORE_ADDR address, asection *section)
2755 if (overlay_debugging)
2757 /* If the symbol has no section, just return its regular address. */
2760 /* If the symbol's section is not an overlay, just return its address */
2761 if (!section_is_overlay (section))
2763 /* If the symbol's section is mapped, just return its address */
2764 if (section_is_mapped (section))
2767 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
2768 * then return its LOADED address rather than its vma address!!
2770 return overlay_unmapped_address (address, section);
2775 /* Function: find_pc_overlay (PC)
2776 Return the best-match overlay section for PC:
2777 If PC matches a mapped overlay section's VMA, return that section.
2778 Else if PC matches an unmapped section's VMA, return that section.
2779 Else if PC matches an unmapped section's LMA, return that section. */
2782 find_pc_overlay (CORE_ADDR pc)
2784 struct objfile *objfile;
2785 struct obj_section *osect, *best_match = NULL;
2787 if (overlay_debugging)
2788 ALL_OBJSECTIONS (objfile, osect)
2789 if (section_is_overlay (osect->the_bfd_section))
2791 if (pc_in_mapped_range (pc, osect->the_bfd_section))
2793 if (overlay_is_mapped (osect))
2794 return osect->the_bfd_section;
2798 else if (pc_in_unmapped_range (pc, osect->the_bfd_section))
2801 return best_match ? best_match->the_bfd_section : NULL;
2804 /* Function: find_pc_mapped_section (PC)
2805 If PC falls into the VMA address range of an overlay section that is
2806 currently marked as MAPPED, return that section. Else return NULL. */
2809 find_pc_mapped_section (CORE_ADDR pc)
2811 struct objfile *objfile;
2812 struct obj_section *osect;
2814 if (overlay_debugging)
2815 ALL_OBJSECTIONS (objfile, osect)
2816 if (pc_in_mapped_range (pc, osect->the_bfd_section) &&
2817 overlay_is_mapped (osect))
2818 return osect->the_bfd_section;
2823 /* Function: list_overlays_command
2824 Print a list of mapped sections and their PC ranges */
2827 list_overlays_command (char *args, int from_tty)
2830 struct objfile *objfile;
2831 struct obj_section *osect;
2833 if (overlay_debugging)
2834 ALL_OBJSECTIONS (objfile, osect)
2835 if (overlay_is_mapped (osect))
2841 vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section);
2842 lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section);
2843 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
2844 name = bfd_section_name (objfile->obfd, osect->the_bfd_section);
2846 printf_filtered ("Section %s, loaded at ", name);
2847 print_address_numeric (lma, 1, gdb_stdout);
2848 puts_filtered (" - ");
2849 print_address_numeric (lma + size, 1, gdb_stdout);
2850 printf_filtered (", mapped at ");
2851 print_address_numeric (vma, 1, gdb_stdout);
2852 puts_filtered (" - ");
2853 print_address_numeric (vma + size, 1, gdb_stdout);
2854 puts_filtered ("\n");
2859 printf_filtered ("No sections are mapped.\n");
2862 /* Function: map_overlay_command
2863 Mark the named section as mapped (ie. residing at its VMA address). */
2866 map_overlay_command (char *args, int from_tty)
2868 struct objfile *objfile, *objfile2;
2869 struct obj_section *sec, *sec2;
2872 if (!overlay_debugging)
2874 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
2875 the 'overlay manual' command.");
2877 if (args == 0 || *args == 0)
2878 error ("Argument required: name of an overlay section");
2880 /* First, find a section matching the user supplied argument */
2881 ALL_OBJSECTIONS (objfile, sec)
2882 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
2884 /* Now, check to see if the section is an overlay. */
2885 bfdsec = sec->the_bfd_section;
2886 if (!section_is_overlay (bfdsec))
2887 continue; /* not an overlay section */
2889 /* Mark the overlay as "mapped" */
2890 sec->ovly_mapped = 1;
2892 /* Next, make a pass and unmap any sections that are
2893 overlapped by this new section: */
2894 ALL_OBJSECTIONS (objfile2, sec2)
2895 if (sec2->ovly_mapped
2897 && sec->the_bfd_section != sec2->the_bfd_section
2898 && sections_overlap (sec->the_bfd_section,
2899 sec2->the_bfd_section))
2902 printf_filtered ("Note: section %s unmapped by overlap\n",
2903 bfd_section_name (objfile->obfd,
2904 sec2->the_bfd_section));
2905 sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2 */
2909 error ("No overlay section called %s", args);
2912 /* Function: unmap_overlay_command
2913 Mark the overlay section as unmapped
2914 (ie. resident in its LMA address range, rather than the VMA range). */
2917 unmap_overlay_command (char *args, int from_tty)
2919 struct objfile *objfile;
2920 struct obj_section *sec;
2922 if (!overlay_debugging)
2924 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
2925 the 'overlay manual' command.");
2927 if (args == 0 || *args == 0)
2928 error ("Argument required: name of an overlay section");
2930 /* First, find a section matching the user supplied argument */
2931 ALL_OBJSECTIONS (objfile, sec)
2932 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
2934 if (!sec->ovly_mapped)
2935 error ("Section %s is not mapped", args);
2936 sec->ovly_mapped = 0;
2939 error ("No overlay section called %s", args);
2942 /* Function: overlay_auto_command
2943 A utility command to turn on overlay debugging.
2944 Possibly this should be done via a set/show command. */
2947 overlay_auto_command (char *args, int from_tty)
2949 overlay_debugging = ovly_auto;
2950 enable_overlay_breakpoints ();
2952 printf_filtered ("Automatic overlay debugging enabled.");
2955 /* Function: overlay_manual_command
2956 A utility command to turn on overlay debugging.
2957 Possibly this should be done via a set/show command. */
2960 overlay_manual_command (char *args, int from_tty)
2962 overlay_debugging = ovly_on;
2963 disable_overlay_breakpoints ();
2965 printf_filtered ("Overlay debugging enabled.");
2968 /* Function: overlay_off_command
2969 A utility command to turn on overlay debugging.
2970 Possibly this should be done via a set/show command. */
2973 overlay_off_command (char *args, int from_tty)
2975 overlay_debugging = ovly_off;
2976 disable_overlay_breakpoints ();
2978 printf_filtered ("Overlay debugging disabled.");
2982 overlay_load_command (char *args, int from_tty)
2984 if (target_overlay_update)
2985 (*target_overlay_update) (NULL);
2987 error ("This target does not know how to read its overlay state.");
2990 /* Function: overlay_command
2991 A place-holder for a mis-typed command */
2993 /* Command list chain containing all defined "overlay" subcommands. */
2994 struct cmd_list_element *overlaylist;
2997 overlay_command (char *args, int from_tty)
3000 ("\"overlay\" must be followed by the name of an overlay command.\n");
3001 help_list (overlaylist, "overlay ", -1, gdb_stdout);
3005 /* Target Overlays for the "Simplest" overlay manager:
3007 This is GDB's default target overlay layer. It works with the
3008 minimal overlay manager supplied as an example by Cygnus. The
3009 entry point is via a function pointer "target_overlay_update",
3010 so targets that use a different runtime overlay manager can
3011 substitute their own overlay_update function and take over the
3014 The overlay_update function pokes around in the target's data structures
3015 to see what overlays are mapped, and updates GDB's overlay mapping with
3018 In this simple implementation, the target data structures are as follows:
3019 unsigned _novlys; /# number of overlay sections #/
3020 unsigned _ovly_table[_novlys][4] = {
3021 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3022 {..., ..., ..., ...},
3024 unsigned _novly_regions; /# number of overlay regions #/
3025 unsigned _ovly_region_table[_novly_regions][3] = {
3026 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3029 These functions will attempt to update GDB's mappedness state in the
3030 symbol section table, based on the target's mappedness state.
3032 To do this, we keep a cached copy of the target's _ovly_table, and
3033 attempt to detect when the cached copy is invalidated. The main
3034 entry point is "simple_overlay_update(SECT), which looks up SECT in
3035 the cached table and re-reads only the entry for that section from
3036 the target (whenever possible).
3039 /* Cached, dynamically allocated copies of the target data structures: */
3040 static unsigned (*cache_ovly_table)[4] = 0;
3042 static unsigned (*cache_ovly_region_table)[3] = 0;
3044 static unsigned cache_novlys = 0;
3046 static unsigned cache_novly_regions = 0;
3048 static CORE_ADDR cache_ovly_table_base = 0;
3050 static CORE_ADDR cache_ovly_region_table_base = 0;
3054 VMA, SIZE, LMA, MAPPED
3056 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
3058 /* Throw away the cached copy of _ovly_table */
3060 simple_free_overlay_table (void)
3062 if (cache_ovly_table)
3063 xfree (cache_ovly_table);
3065 cache_ovly_table = NULL;
3066 cache_ovly_table_base = 0;
3070 /* Throw away the cached copy of _ovly_region_table */
3072 simple_free_overlay_region_table (void)
3074 if (cache_ovly_region_table)
3075 xfree (cache_ovly_region_table);
3076 cache_novly_regions = 0;
3077 cache_ovly_region_table = NULL;
3078 cache_ovly_region_table_base = 0;
3082 /* Read an array of ints from the target into a local buffer.
3083 Convert to host order. int LEN is number of ints */
3085 read_target_long_array (CORE_ADDR memaddr, unsigned int *myaddr, int len)
3087 /* FIXME (alloca): Not safe if array is very large. */
3088 char *buf = alloca (len * TARGET_LONG_BYTES);
3091 read_memory (memaddr, buf, len * TARGET_LONG_BYTES);
3092 for (i = 0; i < len; i++)
3093 myaddr[i] = extract_unsigned_integer (TARGET_LONG_BYTES * i + buf,
3097 /* Find and grab a copy of the target _ovly_table
3098 (and _novlys, which is needed for the table's size) */
3100 simple_read_overlay_table (void)
3102 struct minimal_symbol *novlys_msym, *ovly_table_msym;
3104 simple_free_overlay_table ();
3105 novlys_msym = lookup_minimal_symbol ("_novlys", NULL, NULL);
3108 error ("Error reading inferior's overlay table: "
3109 "couldn't find `_novlys' variable\n"
3110 "in inferior. Use `overlay manual' mode.");
3114 ovly_table_msym = lookup_minimal_symbol ("_ovly_table", NULL, NULL);
3115 if (! ovly_table_msym)
3117 error ("Error reading inferior's overlay table: couldn't find "
3118 "`_ovly_table' array\n"
3119 "in inferior. Use `overlay manual' mode.");
3123 cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym), 4);
3125 = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table));
3126 cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (ovly_table_msym);
3127 read_target_long_array (cache_ovly_table_base,
3128 (int *) cache_ovly_table,
3131 return 1; /* SUCCESS */
3135 /* Find and grab a copy of the target _ovly_region_table
3136 (and _novly_regions, which is needed for the table's size) */
3138 simple_read_overlay_region_table (void)
3140 struct minimal_symbol *msym;
3142 simple_free_overlay_region_table ();
3143 msym = lookup_minimal_symbol ("_novly_regions", NULL, NULL);
3145 cache_novly_regions = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4);
3147 return 0; /* failure */
3148 cache_ovly_region_table = (void *) xmalloc (cache_novly_regions * 12);
3149 if (cache_ovly_region_table != NULL)
3151 msym = lookup_minimal_symbol ("_ovly_region_table", NULL, NULL);
3154 cache_ovly_region_table_base = SYMBOL_VALUE_ADDRESS (msym);
3155 read_target_long_array (cache_ovly_region_table_base,
3156 (int *) cache_ovly_region_table,
3157 cache_novly_regions * 3);
3160 return 0; /* failure */
3163 return 0; /* failure */
3164 return 1; /* SUCCESS */
3168 /* Function: simple_overlay_update_1
3169 A helper function for simple_overlay_update. Assuming a cached copy
3170 of _ovly_table exists, look through it to find an entry whose vma,
3171 lma and size match those of OSECT. Re-read the entry and make sure
3172 it still matches OSECT (else the table may no longer be valid).
3173 Set OSECT's mapped state to match the entry. Return: 1 for
3174 success, 0 for failure. */
3177 simple_overlay_update_1 (struct obj_section *osect)
3180 bfd *obfd = osect->objfile->obfd;
3181 asection *bsect = osect->the_bfd_section;
3183 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
3184 for (i = 0; i < cache_novlys; i++)
3185 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3186 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3187 /* && cache_ovly_table[i][SIZE] == size */ )
3189 read_target_long_array (cache_ovly_table_base + i * TARGET_LONG_BYTES,
3190 (int *) cache_ovly_table[i], 4);
3191 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3192 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3193 /* && cache_ovly_table[i][SIZE] == size */ )
3195 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3198 else /* Warning! Warning! Target's ovly table has changed! */
3204 /* Function: simple_overlay_update
3205 If OSECT is NULL, then update all sections' mapped state
3206 (after re-reading the entire target _ovly_table).
3207 If OSECT is non-NULL, then try to find a matching entry in the
3208 cached ovly_table and update only OSECT's mapped state.
3209 If a cached entry can't be found or the cache isn't valid, then
3210 re-read the entire cache, and go ahead and update all sections. */
3213 simple_overlay_update (struct obj_section *osect)
3215 struct objfile *objfile;
3217 /* Were we given an osect to look up? NULL means do all of them. */
3219 /* Have we got a cached copy of the target's overlay table? */
3220 if (cache_ovly_table != NULL)
3221 /* Does its cached location match what's currently in the symtab? */
3222 if (cache_ovly_table_base ==
3223 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL, NULL)))
3224 /* Then go ahead and try to look up this single section in the cache */
3225 if (simple_overlay_update_1 (osect))
3226 /* Found it! We're done. */
3229 /* Cached table no good: need to read the entire table anew.
3230 Or else we want all the sections, in which case it's actually
3231 more efficient to read the whole table in one block anyway. */
3233 if (! simple_read_overlay_table ())
3236 /* Now may as well update all sections, even if only one was requested. */
3237 ALL_OBJSECTIONS (objfile, osect)
3238 if (section_is_overlay (osect->the_bfd_section))
3241 bfd *obfd = osect->objfile->obfd;
3242 asection *bsect = osect->the_bfd_section;
3244 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
3245 for (i = 0; i < cache_novlys; i++)
3246 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3247 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3248 /* && cache_ovly_table[i][SIZE] == size */ )
3249 { /* obj_section matches i'th entry in ovly_table */
3250 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3251 break; /* finished with inner for loop: break out */
3258 _initialize_symfile (void)
3260 struct cmd_list_element *c;
3262 c = add_cmd ("symbol-file", class_files, symbol_file_command,
3263 "Load symbol table from executable file FILE.\n\
3264 The `file' command can also load symbol tables, as well as setting the file\n\
3265 to execute.", &cmdlist);
3266 set_cmd_completer (c, filename_completer);
3268 c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command,
3269 "Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3270 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3271 ADDR is the starting address of the file's text.\n\
3272 The optional arguments are section-name section-address pairs and\n\
3273 should be specified if the data and bss segments are not contiguous\n\
3274 with the text. SECT is a section name to be loaded at SECT_ADDR.",
3276 set_cmd_completer (c, filename_completer);
3278 c = add_cmd ("add-shared-symbol-files", class_files,
3279 add_shared_symbol_files_command,
3280 "Load the symbols from shared objects in the dynamic linker's link map.",
3282 c = add_alias_cmd ("assf", "add-shared-symbol-files", class_files, 1,
3285 c = add_cmd ("load", class_files, load_command,
3286 "Dynamically load FILE into the running program, and record its symbols\n\
3287 for access from GDB.", &cmdlist);
3288 set_cmd_completer (c, filename_completer);
3291 (add_set_cmd ("symbol-reloading", class_support, var_boolean,
3292 (char *) &symbol_reloading,
3293 "Set dynamic symbol table reloading multiple times in one run.",
3297 add_prefix_cmd ("overlay", class_support, overlay_command,
3298 "Commands for debugging overlays.", &overlaylist,
3299 "overlay ", 0, &cmdlist);
3301 add_com_alias ("ovly", "overlay", class_alias, 1);
3302 add_com_alias ("ov", "overlay", class_alias, 1);
3304 add_cmd ("map-overlay", class_support, map_overlay_command,
3305 "Assert that an overlay section is mapped.", &overlaylist);
3307 add_cmd ("unmap-overlay", class_support, unmap_overlay_command,
3308 "Assert that an overlay section is unmapped.", &overlaylist);
3310 add_cmd ("list-overlays", class_support, list_overlays_command,
3311 "List mappings of overlay sections.", &overlaylist);
3313 add_cmd ("manual", class_support, overlay_manual_command,
3314 "Enable overlay debugging.", &overlaylist);
3315 add_cmd ("off", class_support, overlay_off_command,
3316 "Disable overlay debugging.", &overlaylist);
3317 add_cmd ("auto", class_support, overlay_auto_command,
3318 "Enable automatic overlay debugging.", &overlaylist);
3319 add_cmd ("load-target", class_support, overlay_load_command,
3320 "Read the overlay mapping state from the target.", &overlaylist);
3322 /* Filename extension to source language lookup table: */
3323 init_filename_language_table ();
3324 c = add_set_cmd ("extension-language", class_files, var_string_noescape,
3326 "Set mapping between filename extension and source language.\n\
3327 Usage: set extension-language .foo bar",
3329 set_cmd_cfunc (c, set_ext_lang_command);
3331 add_info ("extensions", info_ext_lang_command,
3332 "All filename extensions associated with a source language.");
3335 (add_set_cmd ("download-write-size", class_obscure,
3336 var_integer, (char *) &download_write_size,
3337 "Set the write size used when downloading a program.\n"
3338 "Only used when downloading a program onto a remote\n"
3339 "target. Specify zero, or a negative value, to disable\n"
3340 "blocked writes. The actual size of each transfer is also\n"
3341 "limited by the size of the target packet and the memory\n"