1 /* Generic symbol file reading for the GNU debugger, GDB.
2 Copyright 1990-1996, 1998, 2000 Free Software Foundation, Inc.
3 Contributed by Cygnus Support, using pieces from other GDB modules.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
32 #include "breakpoint.h"
34 #include "complaints.h"
36 #include "inferior.h" /* for write_pc */
37 #include "gdb-stabs.h"
41 #include <sys/types.h>
43 #include "gdb_string.h"
54 /* Some HP-UX related globals to clear when a new "main"
55 symbol file is loaded. HP-specific. */
57 extern int hp_som_som_object_present;
58 extern int hp_cxx_exception_support_initialized;
59 #define RESET_HP_UX_GLOBALS() do {\
60 hp_som_som_object_present = 0; /* indicates HP-compiled code */ \
61 hp_cxx_exception_support_initialized = 0; /* must reinitialize exception stuff */ \
65 int (*ui_load_progress_hook) (const char *section, unsigned long num);
66 void (*show_load_progress) (const char *section,
67 unsigned long section_sent,
68 unsigned long section_size,
69 unsigned long total_sent,
70 unsigned long total_size);
71 void (*pre_add_symbol_hook) PARAMS ((char *));
72 void (*post_add_symbol_hook) PARAMS ((void));
73 void (*target_new_objfile_hook) PARAMS ((struct objfile *));
75 /* Global variables owned by this file */
76 int readnow_symbol_files; /* Read full symbols immediately */
78 struct complaint oldsyms_complaint =
80 "Replacing old symbols for `%s'", 0, 0
83 struct complaint empty_symtab_complaint =
85 "Empty symbol table found for `%s'", 0, 0
88 struct complaint unknown_option_complaint =
90 "Unknown option `%s' ignored", 0, 0
93 /* External variables and functions referenced. */
95 extern int info_verbose;
97 extern void report_transfer_performance PARAMS ((unsigned long,
100 /* Functions this file defines */
103 static int simple_read_overlay_region_table PARAMS ((void));
104 static void simple_free_overlay_region_table PARAMS ((void));
107 static void set_initial_language PARAMS ((void));
109 static void load_command PARAMS ((char *, int));
111 static void add_symbol_file_command PARAMS ((char *, int));
113 static void add_shared_symbol_files_command PARAMS ((char *, int));
115 static void cashier_psymtab PARAMS ((struct partial_symtab *));
117 static int compare_psymbols PARAMS ((const void *, const void *));
119 static int compare_symbols PARAMS ((const void *, const void *));
121 bfd *symfile_bfd_open PARAMS ((char *));
123 static void find_sym_fns PARAMS ((struct objfile *));
125 static void decrement_reading_symtab PARAMS ((void *));
127 static void overlay_invalidate_all PARAMS ((void));
129 static int overlay_is_mapped PARAMS ((struct obj_section *));
131 void list_overlays_command PARAMS ((char *, int));
133 void map_overlay_command PARAMS ((char *, int));
135 void unmap_overlay_command PARAMS ((char *, int));
137 static void overlay_auto_command PARAMS ((char *, int));
139 static void overlay_manual_command PARAMS ((char *, int));
141 static void overlay_off_command PARAMS ((char *, int));
143 static void overlay_load_command PARAMS ((char *, int));
145 static void overlay_command PARAMS ((char *, int));
147 static void simple_free_overlay_table PARAMS ((void));
149 static void read_target_long_array PARAMS ((CORE_ADDR, unsigned int *, int));
151 static int simple_read_overlay_table PARAMS ((void));
153 static int simple_overlay_update_1 PARAMS ((struct obj_section *));
155 static void add_filename_language PARAMS ((char *ext, enum language lang));
157 static void set_ext_lang_command PARAMS ((char *args, int from_tty));
159 static void info_ext_lang_command PARAMS ((char *args, int from_tty));
161 static void init_filename_language_table PARAMS ((void));
163 void _initialize_symfile PARAMS ((void));
165 /* List of all available sym_fns. On gdb startup, each object file reader
166 calls add_symtab_fns() to register information on each format it is
169 static struct sym_fns *symtab_fns = NULL;
171 /* Flag for whether user will be reloading symbols multiple times.
172 Defaults to ON for VxWorks, otherwise OFF. */
174 #ifdef SYMBOL_RELOADING_DEFAULT
175 int symbol_reloading = SYMBOL_RELOADING_DEFAULT;
177 int symbol_reloading = 0;
180 /* If non-zero, then on HP-UX (i.e., platforms that use somsolib.c),
181 this variable is interpreted as a threshhold. If adding a new
182 library's symbol table to those already known to the debugger would
183 exceed this threshhold, then the shlib's symbols are not added.
185 If non-zero on other platforms, shared library symbols will be added
186 automatically when the inferior is created, new libraries are loaded,
187 or when attaching to the inferior. This is almost always what users
188 will want to have happen; but for very large programs, the startup
189 time will be excessive, and so if this is a problem, the user can
190 clear this flag and then add the shared library symbols as needed.
191 Note that there is a potential for confusion, since if the shared
192 library symbols are not loaded, commands like "info fun" will *not*
193 report all the functions that are actually present.
195 Note that HP-UX interprets this variable to mean, "threshhold size
196 in megabytes, where zero means never add". Other platforms interpret
197 this variable to mean, "always add if non-zero, never add if zero."
200 int auto_solib_add = 1;
203 /* Since this function is called from within qsort, in an ANSI environment
204 it must conform to the prototype for qsort, which specifies that the
205 comparison function takes two "void *" pointers. */
208 compare_symbols (s1p, s2p)
212 register struct symbol **s1, **s2;
214 s1 = (struct symbol **) s1p;
215 s2 = (struct symbol **) s2p;
217 return (STRCMP (SYMBOL_NAME (*s1), SYMBOL_NAME (*s2)));
224 compare_psymbols -- compare two partial symbols by name
228 Given pointers to pointers to two partial symbol table entries,
229 compare them by name and return -N, 0, or +N (ala strcmp).
230 Typically used by sorting routines like qsort().
234 Does direct compare of first two characters before punting
235 and passing to strcmp for longer compares. Note that the
236 original version had a bug whereby two null strings or two
237 identically named one character strings would return the
238 comparison of memory following the null byte.
243 compare_psymbols (s1p, s2p)
247 register char *st1 = SYMBOL_NAME (*(struct partial_symbol **) s1p);
248 register char *st2 = SYMBOL_NAME (*(struct partial_symbol **) s2p);
250 if ((st1[0] - st2[0]) || !st1[0])
252 return (st1[0] - st2[0]);
254 else if ((st1[1] - st2[1]) || !st1[1])
256 return (st1[1] - st2[1]);
260 /* Note: I replaced the STRCMP line (commented out below)
261 * with a simpler "strcmp()" which compares the 2 strings
262 * from the beginning. (STRCMP is a macro which first compares
263 * the initial characters, then falls back on strcmp).
264 * The reason is that the STRCMP line was tickling a C compiler
265 * bug on HP-UX 10.30, which is avoided with the simpler
266 * code. The performance gain from the more complicated code
267 * is negligible, given that we have already checked the
268 * initial 2 characters above. I reported the compiler bug,
269 * and once it is fixed the original line can be put back. RT
271 /* return ( STRCMP (st1 + 2, st2 + 2)); */
272 return (strcmp (st1, st2));
277 sort_pst_symbols (pst)
278 struct partial_symtab *pst;
280 /* Sort the global list; don't sort the static list */
282 qsort (pst->objfile->global_psymbols.list + pst->globals_offset,
283 pst->n_global_syms, sizeof (struct partial_symbol *),
287 /* Call sort_block_syms to sort alphabetically the symbols of one block. */
291 register struct block *b;
293 qsort (&BLOCK_SYM (b, 0), BLOCK_NSYMS (b),
294 sizeof (struct symbol *), compare_symbols);
297 /* Call sort_symtab_syms to sort alphabetically
298 the symbols of each block of one symtab. */
302 register struct symtab *s;
304 register struct blockvector *bv;
307 register struct block *b;
311 bv = BLOCKVECTOR (s);
312 nbl = BLOCKVECTOR_NBLOCKS (bv);
313 for (i = 0; i < nbl; i++)
315 b = BLOCKVECTOR_BLOCK (bv, i);
316 if (BLOCK_SHOULD_SORT (b))
321 /* Make a null terminated copy of the string at PTR with SIZE characters in
322 the obstack pointed to by OBSTACKP . Returns the address of the copy.
323 Note that the string at PTR does not have to be null terminated, I.E. it
324 may be part of a larger string and we are only saving a substring. */
327 obsavestring (ptr, size, obstackp)
330 struct obstack *obstackp;
332 register char *p = (char *) obstack_alloc (obstackp, size + 1);
333 /* Open-coded memcpy--saves function call time. These strings are usually
334 short. FIXME: Is this really still true with a compiler that can
337 register char *p1 = ptr;
338 register char *p2 = p;
339 char *end = ptr + size;
347 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
348 in the obstack pointed to by OBSTACKP. */
351 obconcat (obstackp, s1, s2, s3)
352 struct obstack *obstackp;
353 const char *s1, *s2, *s3;
355 register int len = strlen (s1) + strlen (s2) + strlen (s3) + 1;
356 register char *val = (char *) obstack_alloc (obstackp, len);
363 /* True if we are nested inside psymtab_to_symtab. */
365 int currently_reading_symtab = 0;
368 decrement_reading_symtab (dummy)
371 currently_reading_symtab--;
374 /* Get the symbol table that corresponds to a partial_symtab.
375 This is fast after the first time you do it. In fact, there
376 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
380 psymtab_to_symtab (pst)
381 register struct partial_symtab *pst;
383 /* If it's been looked up before, return it. */
387 /* If it has not yet been read in, read it. */
390 struct cleanup *back_to = make_cleanup (decrement_reading_symtab, NULL);
391 currently_reading_symtab++;
392 (*pst->read_symtab) (pst);
393 do_cleanups (back_to);
399 /* Initialize entry point information for this objfile. */
402 init_entry_point_info (objfile)
403 struct objfile *objfile;
405 /* Save startup file's range of PC addresses to help blockframe.c
406 decide where the bottom of the stack is. */
408 if (bfd_get_file_flags (objfile->obfd) & EXEC_P)
410 /* Executable file -- record its entry point so we'll recognize
411 the startup file because it contains the entry point. */
412 objfile->ei.entry_point = bfd_get_start_address (objfile->obfd);
416 /* Examination of non-executable.o files. Short-circuit this stuff. */
417 objfile->ei.entry_point = INVALID_ENTRY_POINT;
419 objfile->ei.entry_file_lowpc = INVALID_ENTRY_LOWPC;
420 objfile->ei.entry_file_highpc = INVALID_ENTRY_HIGHPC;
421 objfile->ei.entry_func_lowpc = INVALID_ENTRY_LOWPC;
422 objfile->ei.entry_func_highpc = INVALID_ENTRY_HIGHPC;
423 objfile->ei.main_func_lowpc = INVALID_ENTRY_LOWPC;
424 objfile->ei.main_func_highpc = INVALID_ENTRY_HIGHPC;
427 /* Get current entry point address. */
430 entry_point_address ()
432 return symfile_objfile ? symfile_objfile->ei.entry_point : 0;
435 /* Remember the lowest-addressed loadable section we've seen.
436 This function is called via bfd_map_over_sections.
438 In case of equal vmas, the section with the largest size becomes the
439 lowest-addressed loadable section.
441 If the vmas and sizes are equal, the last section is considered the
442 lowest-addressed loadable section. */
445 find_lowest_section (abfd, sect, obj)
450 asection **lowest = (asection **) obj;
452 if (0 == (bfd_get_section_flags (abfd, sect) & SEC_LOAD))
455 *lowest = sect; /* First loadable section */
456 else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect))
457 *lowest = sect; /* A lower loadable section */
458 else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect)
459 && (bfd_section_size (abfd, (*lowest))
460 <= bfd_section_size (abfd, sect)))
465 /* Build (allocate and populate) a section_addr_info struct from
466 an existing section table. */
468 extern struct section_addr_info *
469 build_section_addr_info_from_section_table (const struct section_table *start,
470 const struct section_table *end)
472 struct section_addr_info *sap;
473 const struct section_table *stp;
476 sap = xmalloc (sizeof (struct section_addr_info));
477 memset (sap, 0, sizeof (struct section_addr_info));
479 for (stp = start, oidx = 0; stp != end; stp++)
481 if (strcmp (stp->the_bfd_section->name, ".text") == 0)
482 sap->text_addr = stp->addr;
483 else if (strcmp (stp->the_bfd_section->name, ".data") == 0)
484 sap->data_addr = stp->addr;
485 else if (strcmp (stp->the_bfd_section->name, ".bss") == 0)
486 sap->bss_addr = stp->addr;
488 if (stp->the_bfd_section->flags & (SEC_ALLOC | SEC_LOAD)
489 && oidx < MAX_SECTIONS)
491 sap->other[oidx].addr = stp->addr;
492 sap->other[oidx].name = xstrdup (stp->the_bfd_section->name);
493 sap->other[oidx].sectindex = stp->the_bfd_section->index;
502 /* Free all memory allocated by build_section_addr_info_from_section_table. */
505 free_section_addr_info (struct section_addr_info *sap)
509 for (idx = 0; idx < MAX_SECTIONS; idx++)
510 if (sap->other[idx].name)
511 free (sap->other[idx].name);
516 /* Parse the user's idea of an offset for dynamic linking, into our idea
517 of how to represent it for fast symbol reading. This is the default
518 version of the sym_fns.sym_offsets function for symbol readers that
519 don't need to do anything special. It allocates a section_offsets table
520 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
523 default_symfile_offsets (objfile, addrs)
524 struct objfile *objfile;
525 struct section_addr_info *addrs;
529 objfile->num_sections = SECT_OFF_MAX;
530 objfile->section_offsets = (struct section_offsets *)
531 obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS);
532 memset (objfile->section_offsets, 0, SIZEOF_SECTION_OFFSETS);
534 /* If user explicitly specified values for data and bss, set them here. */
536 if (addrs->text_addr)
537 ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT) = addrs->text_addr;
538 if (addrs->data_addr)
539 ANOFFSET (objfile->section_offsets, SECT_OFF_DATA) = addrs->data_addr;
541 ANOFFSET (objfile->section_offsets, SECT_OFF_BSS) = addrs->bss_addr;
543 /* Now calculate offsets for other sections. */
544 for (i = 0; i < MAX_SECTIONS && addrs->other[i].name; i++)
546 struct other_sections *osp ;
548 osp = &addrs->other[i] ;
549 if (addrs->other[i].addr == 0)
552 if (strcmp (".text", osp->name) == 0)
553 SECT_OFF_TEXT = osp->sectindex ;
554 else if (strcmp (".data", osp->name) == 0)
555 SECT_OFF_DATA = osp->sectindex ;
556 else if (strcmp (".bss", osp->name) == 0)
557 SECT_OFF_BSS = osp->sectindex ;
559 /* Record all sections in offsets */
560 ANOFFSET (objfile->section_offsets, osp->sectindex) = osp->addr;
565 /* Process a symbol file, as either the main file or as a dynamically
568 OBJFILE is where the symbols are to be read from.
570 ADDR is the address where the text segment was loaded, unless the
571 objfile is the main symbol file, in which case it is zero.
573 MAINLINE is nonzero if this is the main symbol file, or zero if
574 it's an extra symbol file such as dynamically loaded code.
576 VERBO is nonzero if the caller has printed a verbose message about
577 the symbol reading (and complaints can be more terse about it). */
580 syms_from_objfile (objfile, addrs, mainline, verbo)
581 struct objfile *objfile;
582 struct section_addr_info *addrs;
586 asection *lower_sect;
588 CORE_ADDR lower_offset;
589 struct section_addr_info local_addr;
590 struct cleanup *old_chain;
593 /* If ADDRS is NULL, initialize the local section_addr_info struct and
594 point ADDRS to it. We now establish the convention that an addr of
595 zero means no load address was specified. */
599 memset (&local_addr, 0, sizeof (local_addr));
603 init_entry_point_info (objfile);
604 find_sym_fns (objfile);
606 /* Make sure that partially constructed symbol tables will be cleaned up
607 if an error occurs during symbol reading. */
608 old_chain = make_cleanup ((make_cleanup_func) free_objfile, objfile);
612 /* We will modify the main symbol table, make sure that all its users
613 will be cleaned up if an error occurs during symbol reading. */
614 make_cleanup ((make_cleanup_func) clear_symtab_users, 0);
616 /* Since no error yet, throw away the old symbol table. */
618 if (symfile_objfile != NULL)
620 free_objfile (symfile_objfile);
621 symfile_objfile = NULL;
624 /* Currently we keep symbols from the add-symbol-file command.
625 If the user wants to get rid of them, they should do "symbol-file"
626 without arguments first. Not sure this is the best behavior
629 (*objfile->sf->sym_new_init) (objfile);
632 /* Convert addr into an offset rather than an absolute address.
633 We find the lowest address of a loaded segment in the objfile,
634 and assume that <addr> is where that got loaded.
636 We no longer warn if the lowest section is not a text segment (as
637 happens for the PA64 port. */
640 /* No offset from objfile addresses. */
641 addrs -> text_addr = 0;
642 addrs -> data_addr = 0;
643 addrs -> bss_addr = 0;
647 /* Find lowest loadable section to be used as starting point for
648 continguous sections. FIXME!! won't work without call to find
649 .text first, but this assumes text is lowest section. */
650 lower_sect = bfd_get_section_by_name (objfile->obfd, ".text");
651 if (lower_sect == NULL)
652 bfd_map_over_sections (objfile->obfd, find_lowest_section,
654 if (lower_sect == NULL)
655 warning ("no loadable sections found in added symbol-file %s",
657 else if ((bfd_get_section_flags (objfile->obfd, lower_sect) & SEC_CODE)
659 warning ("Lowest section in %s is %s at %s",
661 bfd_section_name (objfile->obfd, lower_sect),
662 paddr (bfd_section_vma (objfile->obfd, lower_sect)));
663 if (lower_sect != NULL)
664 lower_offset = bfd_section_vma (objfile->obfd, lower_sect);
668 /* Calculate offsets for the loadable sections.
669 FIXME! Sections must be in order of increasing loadable section
670 so that contiguous sections can use the lower-offset!!!
672 Adjust offsets if the segments are not contiguous.
673 If the section is contiguous, its offset should be set to
674 the offset of the highest loadable section lower than it
675 (the loadable section directly below it in memory).
676 this_offset = lower_offset = lower_addr - lower_orig_addr */
678 /* FIXME: These sections will not need special treatment because ALL
679 sections are in the other sections table */
681 if (addrs->text_addr != 0)
683 sect = bfd_get_section_by_name (objfile->obfd, ".text");
686 addrs->text_addr -= bfd_section_vma (objfile->obfd, sect);
687 lower_offset = addrs->text_addr;
691 /* ??? who's below me? */
692 addrs->text_addr = lower_offset;
694 if (addrs->data_addr != 0)
696 sect = bfd_get_section_by_name (objfile->obfd, ".data");
699 addrs->data_addr -= bfd_section_vma (objfile->obfd, sect);
700 lower_offset = addrs->data_addr;
704 addrs->data_addr = lower_offset;
706 if (addrs->bss_addr != 0)
708 sect = bfd_get_section_by_name (objfile->obfd, ".bss");
711 addrs->bss_addr -= bfd_section_vma (objfile->obfd, sect);
712 lower_offset = addrs->bss_addr;
716 addrs->bss_addr = lower_offset;
718 /* Now calculate offsets for other sections. */
719 for (i=0 ; i < MAX_SECTIONS && addrs->other[i].name; i++)
722 if (addrs->other[i].addr != 0)
724 sect=bfd_get_section_by_name(objfile->obfd, addrs->other[i].name);
727 addrs->other[i].addr -= bfd_section_vma (objfile->obfd, sect);
728 lower_offset = addrs->other[i].addr;
729 addrs->other[i].sectindex = sect->index ;
733 warning ("section %s not found in %s", addrs->other[i].name,
735 addrs->other[i].addr = 0;
739 addrs->other[i].addr = lower_offset;
743 /* Initialize symbol reading routines for this objfile, allow complaints to
744 appear for this new file, and record how verbose to be, then do the
745 initial symbol reading for this file. */
747 (*objfile->sf->sym_init) (objfile);
748 clear_complaints (1, verbo);
750 (*objfile->sf->sym_offsets) (objfile, addrs);
752 #ifndef IBM6000_TARGET
753 /* This is a SVR4/SunOS specific hack, I think. In any event, it
754 screws RS/6000. sym_offsets should be doing this sort of thing,
755 because it knows the mapping between bfd sections and
757 /* This is a hack. As far as I can tell, section offsets are not
758 target dependent. They are all set to addr with a couple of
759 exceptions. The exceptions are sysvr4 shared libraries, whose
760 offsets are kept in solib structures anyway and rs6000 xcoff
761 which handles shared libraries in a completely unique way.
763 Section offsets are built similarly, except that they are built
764 by adding addr in all cases because there is no clear mapping
765 from section_offsets into actual sections. Note that solib.c
766 has a different algorithm for finding section offsets.
768 These should probably all be collapsed into some target
769 independent form of shared library support. FIXME. */
773 struct obj_section *s;
775 /* Map section offsets in "addr" back to the object's
776 sections by comparing the section names with bfd's
777 section names. Then adjust the section address by
778 the offset. */ /* for gdb/13815 */
780 ALL_OBJFILE_OSECTIONS (objfile, s)
782 CORE_ADDR s_addr = 0;
785 if (strcmp (s->the_bfd_section->name, ".text") == 0)
786 s_addr = addrs->text_addr;
787 else if (strcmp (s->the_bfd_section->name, ".data") == 0)
788 s_addr = addrs->data_addr;
789 else if (strcmp (s->the_bfd_section->name, ".bss") == 0)
790 s_addr = addrs->bss_addr;
793 !s_addr && i < MAX_SECTIONS && addrs->other[i].name;
795 if (strcmp (s->the_bfd_section->name, addrs->other[i].name) == 0)
796 s_addr = addrs->other[i].addr; /* end added for gdb/13815 */
798 s->addr -= s->offset;
800 s->endaddr -= s->offset;
801 s->endaddr += s_addr;
805 #endif /* not IBM6000_TARGET */
807 (*objfile->sf->sym_read) (objfile, mainline);
809 if (!have_partial_symbols () && !have_full_symbols ())
812 printf_filtered ("(no debugging symbols found)...");
816 /* Don't allow char * to have a typename (else would get caddr_t).
817 Ditto void *. FIXME: Check whether this is now done by all the
818 symbol readers themselves (many of them now do), and if so remove
821 TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0;
822 TYPE_NAME (lookup_pointer_type (builtin_type_void)) = 0;
824 /* Mark the objfile has having had initial symbol read attempted. Note
825 that this does not mean we found any symbols... */
827 objfile->flags |= OBJF_SYMS;
829 /* Discard cleanups as symbol reading was successful. */
831 discard_cleanups (old_chain);
833 /* Call this after reading in a new symbol table to give target
834 dependant code a crack at the new symbols. For instance, this
835 could be used to update the values of target-specific symbols GDB
836 needs to keep track of (such as _sigtramp, or whatever). */
838 TARGET_SYMFILE_POSTREAD (objfile);
841 /* Perform required actions after either reading in the initial
842 symbols for a new objfile, or mapping in the symbols from a reusable
846 new_symfile_objfile (objfile, mainline, verbo)
847 struct objfile *objfile;
852 /* If this is the main symbol file we have to clean up all users of the
853 old main symbol file. Otherwise it is sufficient to fixup all the
854 breakpoints that may have been redefined by this symbol file. */
857 /* OK, make it the "real" symbol file. */
858 symfile_objfile = objfile;
860 clear_symtab_users ();
864 breakpoint_re_set ();
867 /* We're done reading the symbol file; finish off complaints. */
868 clear_complaints (0, verbo);
871 /* Process a symbol file, as either the main file or as a dynamically
874 NAME is the file name (which will be tilde-expanded and made
875 absolute herein) (but we don't free or modify NAME itself).
876 FROM_TTY says how verbose to be. MAINLINE specifies whether this
877 is the main symbol file, or whether it's an extra symbol file such
878 as dynamically loaded code. If !mainline, ADDR is the address
879 where the text segment was loaded.
881 Upon success, returns a pointer to the objfile that was added.
882 Upon failure, jumps back to command level (never returns). */
885 symbol_file_add (name, from_tty, addrs, mainline, flags)
888 struct section_addr_info *addrs;
892 struct objfile *objfile;
893 struct partial_symtab *psymtab;
896 /* Open a bfd for the file, and give user a chance to burp if we'd be
897 interactively wiping out any existing symbols. */
899 abfd = symfile_bfd_open (name);
901 if ((have_full_symbols () || have_partial_symbols ())
904 && !query ("Load new symbol table from \"%s\"? ", name))
905 error ("Not confirmed.");
907 objfile = allocate_objfile (abfd, flags);
909 /* If the objfile uses a mapped symbol file, and we have a psymtab for
910 it, then skip reading any symbols at this time. */
912 if ((objfile->flags & OBJF_MAPPED) && (objfile->flags & OBJF_SYMS))
914 /* We mapped in an existing symbol table file that already has had
915 initial symbol reading performed, so we can skip that part. Notify
916 the user that instead of reading the symbols, they have been mapped.
918 if (from_tty || info_verbose)
920 printf_filtered ("Mapped symbols for %s...", name);
922 gdb_flush (gdb_stdout);
924 init_entry_point_info (objfile);
925 find_sym_fns (objfile);
929 /* We either created a new mapped symbol table, mapped an existing
930 symbol table file which has not had initial symbol reading
931 performed, or need to read an unmapped symbol table. */
932 if (from_tty || info_verbose)
934 if (pre_add_symbol_hook)
935 pre_add_symbol_hook (name);
938 printf_filtered ("Reading symbols from %s...", name);
940 gdb_flush (gdb_stdout);
943 syms_from_objfile (objfile, addrs, mainline, from_tty);
946 /* We now have at least a partial symbol table. Check to see if the
947 user requested that all symbols be read on initial access via either
948 the gdb startup command line or on a per symbol file basis. Expand
949 all partial symbol tables for this objfile if so. */
951 if ((flags & OBJF_READNOW) || readnow_symbol_files)
953 if (from_tty || info_verbose)
955 printf_filtered ("expanding to full symbols...");
957 gdb_flush (gdb_stdout);
960 for (psymtab = objfile->psymtabs;
962 psymtab = psymtab->next)
964 psymtab_to_symtab (psymtab);
968 if (from_tty || info_verbose)
970 if (post_add_symbol_hook)
971 post_add_symbol_hook ();
974 printf_filtered ("done.\n");
975 gdb_flush (gdb_stdout);
979 new_symfile_objfile (objfile, mainline, from_tty);
981 if (target_new_objfile_hook)
982 target_new_objfile_hook (objfile);
987 /* This is the symbol-file command. Read the file, analyze its
988 symbols, and add a struct symtab to a symtab list. The syntax of
989 the command is rather bizarre--(1) buildargv implements various
990 quoting conventions which are undocumented and have little or
991 nothing in common with the way things are quoted (or not quoted)
992 elsewhere in GDB, (2) options are used, which are not generally
993 used in GDB (perhaps "set mapped on", "set readnow on" would be
994 better), (3) the order of options matters, which is contrary to GNU
995 conventions (because it is confusing and inconvenient). */
996 /* Note: ezannoni 2000-04-17. This function used to have support for
997 rombug (see remote-os9k.c). It consisted of a call to target_link()
998 (target.c) to get the address of the text segment from the target,
999 and pass that to symbol_file_add(). This is no longer supported. */
1002 symbol_file_command (args, from_tty)
1008 struct cleanup *cleanups;
1009 int flags = OBJF_USERLOADED;
1015 if ((have_full_symbols () || have_partial_symbols ())
1017 && !query ("Discard symbol table from `%s'? ",
1018 symfile_objfile->name))
1019 error ("Not confirmed.");
1020 free_all_objfiles ();
1022 /* solib descriptors may have handles to objfiles. Since their
1023 storage has just been released, we'd better wipe the solib
1024 descriptors as well.
1026 #if defined(SOLIB_RESTART)
1030 symfile_objfile = NULL;
1032 printf_unfiltered ("No symbol file now.\n");
1034 RESET_HP_UX_GLOBALS ();
1039 if ((argv = buildargv (args)) == NULL)
1043 cleanups = make_cleanup_freeargv (argv);
1044 while (*argv != NULL)
1046 if (STREQ (*argv, "-mapped"))
1047 flags |= OBJF_MAPPED;
1049 if (STREQ (*argv, "-readnow"))
1050 flags |= OBJF_READNOW;
1053 error ("unknown option `%s'", *argv);
1057 symbol_file_add (name, from_tty, NULL, 1, flags);
1059 RESET_HP_UX_GLOBALS ();
1061 /* Getting new symbols may change our opinion about
1062 what is frameless. */
1063 reinit_frame_cache ();
1065 set_initial_language ();
1072 error ("no symbol file name was specified");
1074 TUIDO (((TuiOpaqueFuncPtr) tuiDisplayMainFunction));
1075 do_cleanups (cleanups);
1079 /* Set the initial language.
1081 A better solution would be to record the language in the psymtab when reading
1082 partial symbols, and then use it (if known) to set the language. This would
1083 be a win for formats that encode the language in an easily discoverable place,
1084 such as DWARF. For stabs, we can jump through hoops looking for specially
1085 named symbols or try to intuit the language from the specific type of stabs
1086 we find, but we can't do that until later when we read in full symbols.
1090 set_initial_language ()
1092 struct partial_symtab *pst;
1093 enum language lang = language_unknown;
1095 pst = find_main_psymtab ();
1098 if (pst->filename != NULL)
1100 lang = deduce_language_from_filename (pst->filename);
1102 if (lang == language_unknown)
1104 /* Make C the default language */
1107 set_language (lang);
1108 expected_language = current_language; /* Don't warn the user */
1112 /* Open file specified by NAME and hand it off to BFD for preliminary
1113 analysis. Result is a newly initialized bfd *, which includes a newly
1114 malloc'd` copy of NAME (tilde-expanded and made absolute).
1115 In case of trouble, error() is called. */
1118 symfile_bfd_open (name)
1123 char *absolute_name;
1127 name = tilde_expand (name); /* Returns 1st new malloc'd copy */
1129 /* Look down path for it, allocate 2nd new malloc'd copy. */
1130 desc = openp (getenv ("PATH"), 1, name, O_RDONLY | O_BINARY, 0, &absolute_name);
1131 #if defined(__GO32__) || defined(_WIN32)
1134 char *exename = alloca (strlen (name) + 5);
1135 strcat (strcpy (exename, name), ".exe");
1136 desc = openp (getenv ("PATH"), 1, exename, O_RDONLY | O_BINARY,
1142 make_cleanup (free, name);
1143 perror_with_name (name);
1145 free (name); /* Free 1st new malloc'd copy */
1146 name = absolute_name; /* Keep 2nd malloc'd copy in bfd */
1147 /* It'll be freed in free_objfile(). */
1149 sym_bfd = bfd_fdopenr (name, gnutarget, desc);
1153 make_cleanup (free, name);
1154 error ("\"%s\": can't open to read symbols: %s.", name,
1155 bfd_errmsg (bfd_get_error ()));
1157 sym_bfd->cacheable = true;
1159 if (!bfd_check_format (sym_bfd, bfd_object))
1161 /* FIXME: should be checking for errors from bfd_close (for one thing,
1162 on error it does not free all the storage associated with the
1164 bfd_close (sym_bfd); /* This also closes desc */
1165 make_cleanup (free, name);
1166 error ("\"%s\": can't read symbols: %s.", name,
1167 bfd_errmsg (bfd_get_error ()));
1172 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1173 startup by the _initialize routine in each object file format reader,
1174 to register information about each format the the reader is prepared
1181 sf->next = symtab_fns;
1186 /* Initialize to read symbols from the symbol file sym_bfd. It either
1187 returns or calls error(). The result is an initialized struct sym_fns
1188 in the objfile structure, that contains cached information about the
1192 find_sym_fns (objfile)
1193 struct objfile *objfile;
1196 enum bfd_flavour our_flavour = bfd_get_flavour (objfile->obfd);
1197 char *our_target = bfd_get_target (objfile->obfd);
1199 /* Special kludge for RS/6000 and PowerMac. See xcoffread.c. */
1200 if (STREQ (our_target, "aixcoff-rs6000") ||
1201 STREQ (our_target, "xcoff-powermac"))
1202 our_flavour = (enum bfd_flavour) -1;
1204 /* Special kludge for apollo. See dstread.c. */
1205 if (STREQN (our_target, "apollo", 6))
1206 our_flavour = (enum bfd_flavour) -2;
1208 for (sf = symtab_fns; sf != NULL; sf = sf->next)
1210 if (our_flavour == sf->sym_flavour)
1216 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
1217 bfd_get_target (objfile->obfd));
1220 /* This function runs the load command of our current target. */
1223 load_command (arg, from_tty)
1228 arg = get_exec_file (1);
1229 target_load (arg, from_tty);
1232 /* This version of "load" should be usable for any target. Currently
1233 it is just used for remote targets, not inftarg.c or core files,
1234 on the theory that only in that case is it useful.
1236 Avoiding xmodem and the like seems like a win (a) because we don't have
1237 to worry about finding it, and (b) On VMS, fork() is very slow and so
1238 we don't want to run a subprocess. On the other hand, I'm not sure how
1239 performance compares. */
1241 static int download_write_size = 512;
1242 static int validate_download = 0;
1245 generic_load (char *args, int from_tty)
1249 time_t start_time, end_time; /* Start and end times of download */
1250 unsigned long data_count = 0; /* Number of bytes transferred to memory */
1251 unsigned long write_count = 0; /* Number of writes needed. */
1252 unsigned long load_offset; /* offset to add to vma for each section */
1254 struct cleanup *old_cleanups;
1256 CORE_ADDR total_size = 0;
1257 CORE_ADDR total_sent = 0;
1259 /* Parse the input argument - the user can specify a load offset as
1260 a second argument. */
1261 filename = xmalloc (strlen (args) + 1);
1262 old_cleanups = make_cleanup (free, filename);
1263 strcpy (filename, args);
1264 offptr = strchr (filename, ' ');
1268 load_offset = strtoul (offptr, &endptr, 0);
1269 if (offptr == endptr)
1270 error ("Invalid download offset:%s\n", offptr);
1276 /* Open the file for loading. */
1277 loadfile_bfd = bfd_openr (filename, gnutarget);
1278 if (loadfile_bfd == NULL)
1280 perror_with_name (filename);
1284 /* FIXME: should be checking for errors from bfd_close (for one thing,
1285 on error it does not free all the storage associated with the
1287 make_cleanup ((make_cleanup_func) bfd_close, loadfile_bfd);
1289 if (!bfd_check_format (loadfile_bfd, bfd_object))
1291 error ("\"%s\" is not an object file: %s", filename,
1292 bfd_errmsg (bfd_get_error ()));
1295 for (s = loadfile_bfd->sections; s; s = s->next)
1296 if (s->flags & SEC_LOAD)
1297 total_size += bfd_get_section_size_before_reloc (s);
1299 start_time = time (NULL);
1301 for (s = loadfile_bfd->sections; s; s = s->next)
1303 if (s->flags & SEC_LOAD)
1305 CORE_ADDR size = bfd_get_section_size_before_reloc (s);
1309 struct cleanup *old_chain;
1310 CORE_ADDR lma = s->lma + load_offset;
1311 CORE_ADDR block_size;
1313 const char *sect_name = bfd_get_section_name (loadfile_bfd, s);
1316 if (download_write_size > 0 && size > download_write_size)
1317 block_size = download_write_size;
1321 buffer = xmalloc (size);
1322 old_chain = make_cleanup (free, buffer);
1324 /* Is this really necessary? I guess it gives the user something
1325 to look at during a long download. */
1327 ui_out_message (uiout, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1328 sect_name, paddr_nz (size), paddr_nz (lma));
1330 fprintf_unfiltered (gdb_stdout,
1331 "Loading section %s, size 0x%s lma 0x%s\n",
1332 sect_name, paddr_nz (size), paddr_nz (lma));
1335 bfd_get_section_contents (loadfile_bfd, s, buffer, 0, size);
1341 CORE_ADDR this_transfer = size - sent;
1342 if (this_transfer >= block_size)
1343 this_transfer = block_size;
1344 len = target_write_memory_partial (lma, buffer,
1345 this_transfer, &err);
1348 if (validate_download)
1350 /* Broken memories and broken monitors manifest
1351 themselves here when bring new computers to
1352 life. This doubles already slow downloads. */
1353 /* NOTE: cagney/1999-10-18: A more efficient
1354 implementation might add a verify_memory()
1355 method to the target vector and then use
1356 that. remote.c could implement that method
1357 using the ``qCRC'' packet. */
1358 char *check = xmalloc (len);
1359 struct cleanup *verify_cleanups = make_cleanup (free, check);
1360 if (target_read_memory (lma, check, len) != 0)
1361 error ("Download verify read failed at 0x%s",
1363 if (memcmp (buffer, check, len) != 0)
1364 error ("Download verify compare failed at 0x%s",
1366 do_cleanups (verify_cleanups);
1375 || (ui_load_progress_hook != NULL
1376 && ui_load_progress_hook (sect_name, sent)))
1377 error ("Canceled the download");
1379 if (show_load_progress != NULL)
1380 show_load_progress (sect_name, sent, size, total_sent, total_size);
1382 while (sent < size);
1385 error ("Memory access error while loading section %s.", sect_name);
1387 do_cleanups (old_chain);
1392 end_time = time (NULL);
1395 entry = bfd_get_start_address (loadfile_bfd);
1397 ui_out_text (uiout, "Start address ");
1398 ui_out_field_fmt (uiout, "address", "0x%s" , paddr_nz (entry));
1399 ui_out_text (uiout, ", load size ");
1400 ui_out_field_fmt (uiout, "load-size", "%ld" , data_count);
1401 ui_out_text (uiout, "\n");
1404 fprintf_unfiltered (gdb_stdout,
1405 "Start address 0x%s , load size %ld\n",
1406 paddr_nz (entry), data_count);
1408 /* We were doing this in remote-mips.c, I suspect it is right
1409 for other targets too. */
1413 /* FIXME: are we supposed to call symbol_file_add or not? According to
1414 a comment from remote-mips.c (where a call to symbol_file_add was
1415 commented out), making the call confuses GDB if more than one file is
1416 loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c
1419 print_transfer_performance (gdb_stdout, data_count, write_count,
1420 end_time - start_time);
1422 do_cleanups (old_cleanups);
1425 /* Report how fast the transfer went. */
1427 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1428 replaced by print_transfer_performance (with a very different
1429 function signature). */
1432 report_transfer_performance (data_count, start_time, end_time)
1433 unsigned long data_count;
1434 time_t start_time, end_time;
1436 print_transfer_performance (gdb_stdout, data_count, end_time - start_time, 0);
1440 print_transfer_performance (struct ui_file *stream,
1441 unsigned long data_count,
1442 unsigned long write_count,
1443 unsigned long time_count)
1446 ui_out_text (uiout, "Transfer rate: ");
1449 ui_out_field_fmt (uiout, "transfer-rate", "%ld",
1450 (data_count * 8) / time_count);
1451 ui_out_text (uiout, " bits/sec");
1455 ui_out_field_fmt (uiout, "transferred-bits", "%ld", (data_count * 8));
1456 ui_out_text (uiout, " bits in <1 sec");
1458 if (write_count > 0)
1460 ui_out_text (uiout, ", ");
1461 ui_out_field_fmt (uiout, "write-rate", "%ld", data_count / write_count);
1462 ui_out_text (uiout, " bytes/write");
1464 ui_out_text (uiout, ".\n");
1466 fprintf_unfiltered (stream, "Transfer rate: ");
1468 fprintf_unfiltered (stream, "%ld bits/sec", (data_count * 8) / time_count);
1470 fprintf_unfiltered (stream, "%ld bits in <1 sec", (data_count * 8));
1471 if (write_count > 0)
1472 fprintf_unfiltered (stream, ", %ld bytes/write", data_count / write_count);
1473 fprintf_unfiltered (stream, ".\n");
1477 /* This function allows the addition of incrementally linked object files.
1478 It does not modify any state in the target, only in the debugger. */
1479 /* Note: ezannoni 2000-04-13 This function/command used to have a
1480 special case syntax for the rombug target (Rombug is the boot
1481 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
1482 rombug case, the user doesn't need to supply a text address,
1483 instead a call to target_link() (in target.c) would supply the
1484 value to use. We are now discontinuing this type of ad hoc syntax. */
1488 add_symbol_file_command (args, from_tty)
1492 char *filename = NULL;
1493 int flags = OBJF_USERLOADED;
1495 int expecting_option = 0;
1496 int section_index = 0;
1500 int expecting_sec_name = 0;
1501 int expecting_sec_addr = 0;
1507 } sect_opts[SECT_OFF_MAX];
1509 struct section_addr_info section_addrs;
1510 struct cleanup *my_cleanups;
1515 error ("add-symbol-file takes a file name and an address");
1517 /* Make a copy of the string that we can safely write into. */
1518 args = xstrdup (args);
1520 /* Ensure section_addrs is initialized */
1521 memset (§ion_addrs, 0, sizeof (section_addrs));
1523 while (*args != '\000')
1525 /* Any leading spaces? */
1526 while (isspace (*args))
1529 /* Point arg to the beginning of the argument. */
1532 /* Move args pointer over the argument. */
1533 while ((*args != '\000') && !isspace (*args))
1536 /* If there are more arguments, terminate arg and
1538 if (*args != '\000')
1541 /* Now process the argument. */
1544 /* The first argument is the file name. */
1545 filename = tilde_expand (arg);
1546 my_cleanups = make_cleanup (free, filename);
1551 /* The second argument is always the text address at which
1552 to load the program. */
1553 sect_opts[section_index].name = ".text";
1554 sect_opts[section_index].value = arg;
1559 /* It's an option (starting with '-') or it's an argument
1564 if (strcmp (arg, "-mapped") == 0)
1565 flags |= OBJF_MAPPED;
1567 if (strcmp (arg, "-readnow") == 0)
1568 flags |= OBJF_READNOW;
1570 if (strcmp (arg, "-s") == 0)
1572 if (section_index >= SECT_OFF_MAX)
1573 error ("Too many sections specified.");
1574 expecting_sec_name = 1;
1575 expecting_sec_addr = 1;
1580 if (expecting_sec_name)
1582 sect_opts[section_index].name = arg;
1583 expecting_sec_name = 0;
1586 if (expecting_sec_addr)
1588 sect_opts[section_index].value = arg;
1589 expecting_sec_addr = 0;
1593 error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*");
1599 /* Print the prompt for the query below. And save the arguments into
1600 a sect_addr_info structure to be passed around to other
1601 functions. We have to split this up into separate print
1602 statements because local_hex_string returns a local static
1605 printf_filtered ("add symbol table from file \"%s\" at\n", filename);
1606 for (i = 0; i < section_index; i++)
1609 char *val = sect_opts[i].value;
1610 char *sec = sect_opts[i].name;
1612 val = sect_opts[i].value;
1613 if (val[0] == '0' && val[1] == 'x')
1614 addr = strtoul (val+2, NULL, 16);
1616 addr = strtoul (val, NULL, 10);
1618 if (strcmp (sec, ".text") == 0)
1619 section_addrs.text_addr = addr;
1620 else if (strcmp (sec, ".data") == 0)
1621 section_addrs.data_addr = addr;
1622 else if (strcmp (sec, ".bss") == 0)
1623 section_addrs.bss_addr = addr;
1625 /* Here we store the section offsets in the order they were
1626 entered on the command line. */
1627 section_addrs.other[sec_num].name = sec;
1628 section_addrs.other[sec_num].addr = addr;
1629 printf_filtered ("\t%s_addr = %s\n",
1631 local_hex_string ((unsigned long)addr));
1634 /* The object's sections are initialized when a
1635 call is made to build_objfile_section_table (objfile).
1636 This happens in reread_symbols.
1637 At this point, we don't know what file type this is,
1638 so we can't determine what section names are valid. */
1641 if (from_tty && (!query ("%s", "")))
1642 error ("Not confirmed.");
1644 symbol_file_add (filename, from_tty, §ion_addrs, 0, flags);
1646 /* Getting new symbols may change our opinion about what is
1648 reinit_frame_cache ();
1649 do_cleanups (my_cleanups);
1653 add_shared_symbol_files_command (args, from_tty)
1657 #ifdef ADD_SHARED_SYMBOL_FILES
1658 ADD_SHARED_SYMBOL_FILES (args, from_tty);
1660 error ("This command is not available in this configuration of GDB.");
1664 /* Re-read symbols if a symbol-file has changed. */
1668 struct objfile *objfile;
1671 struct stat new_statbuf;
1674 /* With the addition of shared libraries, this should be modified,
1675 the load time should be saved in the partial symbol tables, since
1676 different tables may come from different source files. FIXME.
1677 This routine should then walk down each partial symbol table
1678 and see if the symbol table that it originates from has been changed */
1680 for (objfile = object_files; objfile; objfile = objfile->next)
1684 #ifdef IBM6000_TARGET
1685 /* If this object is from a shared library, then you should
1686 stat on the library name, not member name. */
1688 if (objfile->obfd->my_archive)
1689 res = stat (objfile->obfd->my_archive->filename, &new_statbuf);
1692 res = stat (objfile->name, &new_statbuf);
1695 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1696 printf_filtered ("`%s' has disappeared; keeping its symbols.\n",
1700 new_modtime = new_statbuf.st_mtime;
1701 if (new_modtime != objfile->mtime)
1703 struct cleanup *old_cleanups;
1704 struct section_offsets *offsets;
1706 char *obfd_filename;
1708 printf_filtered ("`%s' has changed; re-reading symbols.\n",
1711 /* There are various functions like symbol_file_add,
1712 symfile_bfd_open, syms_from_objfile, etc., which might
1713 appear to do what we want. But they have various other
1714 effects which we *don't* want. So we just do stuff
1715 ourselves. We don't worry about mapped files (for one thing,
1716 any mapped file will be out of date). */
1718 /* If we get an error, blow away this objfile (not sure if
1719 that is the correct response for things like shared
1721 old_cleanups = make_cleanup ((make_cleanup_func) free_objfile,
1723 /* We need to do this whenever any symbols go away. */
1724 make_cleanup ((make_cleanup_func) clear_symtab_users, 0);
1726 /* Clean up any state BFD has sitting around. We don't need
1727 to close the descriptor but BFD lacks a way of closing the
1728 BFD without closing the descriptor. */
1729 obfd_filename = bfd_get_filename (objfile->obfd);
1730 if (!bfd_close (objfile->obfd))
1731 error ("Can't close BFD for %s: %s", objfile->name,
1732 bfd_errmsg (bfd_get_error ()));
1733 objfile->obfd = bfd_openr (obfd_filename, gnutarget);
1734 if (objfile->obfd == NULL)
1735 error ("Can't open %s to read symbols.", objfile->name);
1736 /* bfd_openr sets cacheable to true, which is what we want. */
1737 if (!bfd_check_format (objfile->obfd, bfd_object))
1738 error ("Can't read symbols from %s: %s.", objfile->name,
1739 bfd_errmsg (bfd_get_error ()));
1741 /* Save the offsets, we will nuke them with the rest of the
1743 num_offsets = objfile->num_sections;
1744 offsets = (struct section_offsets *) alloca (SIZEOF_SECTION_OFFSETS);
1745 memcpy (offsets, objfile->section_offsets, SIZEOF_SECTION_OFFSETS);
1747 /* Nuke all the state that we will re-read. Much of the following
1748 code which sets things to NULL really is necessary to tell
1749 other parts of GDB that there is nothing currently there. */
1751 /* FIXME: Do we have to free a whole linked list, or is this
1753 if (objfile->global_psymbols.list)
1754 mfree (objfile->md, objfile->global_psymbols.list);
1755 memset (&objfile->global_psymbols, 0,
1756 sizeof (objfile->global_psymbols));
1757 if (objfile->static_psymbols.list)
1758 mfree (objfile->md, objfile->static_psymbols.list);
1759 memset (&objfile->static_psymbols, 0,
1760 sizeof (objfile->static_psymbols));
1762 /* Free the obstacks for non-reusable objfiles */
1763 free_bcache (&objfile->psymbol_cache);
1764 obstack_free (&objfile->psymbol_obstack, 0);
1765 obstack_free (&objfile->symbol_obstack, 0);
1766 obstack_free (&objfile->type_obstack, 0);
1767 objfile->sections = NULL;
1768 objfile->symtabs = NULL;
1769 objfile->psymtabs = NULL;
1770 objfile->free_psymtabs = NULL;
1771 objfile->msymbols = NULL;
1772 objfile->minimal_symbol_count = 0;
1773 memset (&objfile->msymbol_hash, 0,
1774 sizeof (objfile->msymbol_hash));
1775 memset (&objfile->msymbol_demangled_hash, 0,
1776 sizeof (objfile->msymbol_demangled_hash));
1777 objfile->fundamental_types = NULL;
1778 if (objfile->sf != NULL)
1780 (*objfile->sf->sym_finish) (objfile);
1783 /* We never make this a mapped file. */
1785 /* obstack_specify_allocation also initializes the obstack so
1787 obstack_specify_allocation (&objfile->psymbol_cache.cache, 0, 0,
1789 obstack_specify_allocation (&objfile->psymbol_obstack, 0, 0,
1791 obstack_specify_allocation (&objfile->symbol_obstack, 0, 0,
1793 obstack_specify_allocation (&objfile->type_obstack, 0, 0,
1795 if (build_objfile_section_table (objfile))
1797 error ("Can't find the file sections in `%s': %s",
1798 objfile->name, bfd_errmsg (bfd_get_error ()));
1801 /* We use the same section offsets as from last time. I'm not
1802 sure whether that is always correct for shared libraries. */
1803 objfile->section_offsets = (struct section_offsets *)
1804 obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS);
1805 memcpy (objfile->section_offsets, offsets, SIZEOF_SECTION_OFFSETS);
1806 objfile->num_sections = num_offsets;
1808 /* What the hell is sym_new_init for, anyway? The concept of
1809 distinguishing between the main file and additional files
1810 in this way seems rather dubious. */
1811 if (objfile == symfile_objfile)
1813 (*objfile->sf->sym_new_init) (objfile);
1815 RESET_HP_UX_GLOBALS ();
1819 (*objfile->sf->sym_init) (objfile);
1820 clear_complaints (1, 1);
1821 /* The "mainline" parameter is a hideous hack; I think leaving it
1822 zero is OK since dbxread.c also does what it needs to do if
1823 objfile->global_psymbols.size is 0. */
1824 (*objfile->sf->sym_read) (objfile, 0);
1825 if (!have_partial_symbols () && !have_full_symbols ())
1828 printf_filtered ("(no debugging symbols found)\n");
1831 objfile->flags |= OBJF_SYMS;
1833 /* We're done reading the symbol file; finish off complaints. */
1834 clear_complaints (0, 1);
1836 /* Getting new symbols may change our opinion about what is
1839 reinit_frame_cache ();
1841 /* Discard cleanups as symbol reading was successful. */
1842 discard_cleanups (old_cleanups);
1844 /* If the mtime has changed between the time we set new_modtime
1845 and now, we *want* this to be out of date, so don't call stat
1847 objfile->mtime = new_modtime;
1850 /* Call this after reading in a new symbol table to give target
1851 dependant code a crack at the new symbols. For instance, this
1852 could be used to update the values of target-specific symbols GDB
1853 needs to keep track of (such as _sigtramp, or whatever). */
1855 TARGET_SYMFILE_POSTREAD (objfile);
1861 clear_symtab_users ();
1873 static filename_language *filename_language_table;
1874 static int fl_table_size, fl_table_next;
1877 add_filename_language (ext, lang)
1881 if (fl_table_next >= fl_table_size)
1883 fl_table_size += 10;
1884 filename_language_table = realloc (filename_language_table,
1888 filename_language_table[fl_table_next].ext = strsave (ext);
1889 filename_language_table[fl_table_next].lang = lang;
1893 static char *ext_args;
1896 set_ext_lang_command (args, from_tty)
1901 char *cp = ext_args;
1904 /* First arg is filename extension, starting with '.' */
1906 error ("'%s': Filename extension must begin with '.'", ext_args);
1908 /* Find end of first arg. */
1909 while (*cp && !isspace (*cp))
1913 error ("'%s': two arguments required -- filename extension and language",
1916 /* Null-terminate first arg */
1919 /* Find beginning of second arg, which should be a source language. */
1920 while (*cp && isspace (*cp))
1924 error ("'%s': two arguments required -- filename extension and language",
1927 /* Lookup the language from among those we know. */
1928 lang = language_enum (cp);
1930 /* Now lookup the filename extension: do we already know it? */
1931 for (i = 0; i < fl_table_next; i++)
1932 if (0 == strcmp (ext_args, filename_language_table[i].ext))
1935 if (i >= fl_table_next)
1937 /* new file extension */
1938 add_filename_language (ext_args, lang);
1942 /* redefining a previously known filename extension */
1945 /* query ("Really make files of type %s '%s'?", */
1946 /* ext_args, language_str (lang)); */
1948 free (filename_language_table[i].ext);
1949 filename_language_table[i].ext = strsave (ext_args);
1950 filename_language_table[i].lang = lang;
1955 info_ext_lang_command (args, from_tty)
1961 printf_filtered ("Filename extensions and the languages they represent:");
1962 printf_filtered ("\n\n");
1963 for (i = 0; i < fl_table_next; i++)
1964 printf_filtered ("\t%s\t- %s\n",
1965 filename_language_table[i].ext,
1966 language_str (filename_language_table[i].lang));
1970 init_filename_language_table ()
1972 if (fl_table_size == 0) /* protect against repetition */
1976 filename_language_table =
1977 xmalloc (fl_table_size * sizeof (*filename_language_table));
1978 add_filename_language (".c", language_c);
1979 add_filename_language (".C", language_cplus);
1980 add_filename_language (".cc", language_cplus);
1981 add_filename_language (".cp", language_cplus);
1982 add_filename_language (".cpp", language_cplus);
1983 add_filename_language (".cxx", language_cplus);
1984 add_filename_language (".c++", language_cplus);
1985 add_filename_language (".java", language_java);
1986 add_filename_language (".class", language_java);
1987 add_filename_language (".ch", language_chill);
1988 add_filename_language (".c186", language_chill);
1989 add_filename_language (".c286", language_chill);
1990 add_filename_language (".f", language_fortran);
1991 add_filename_language (".F", language_fortran);
1992 add_filename_language (".s", language_asm);
1993 add_filename_language (".S", language_asm);
1998 deduce_language_from_filename (filename)
2004 if (filename != NULL)
2005 if ((cp = strrchr (filename, '.')) != NULL)
2006 for (i = 0; i < fl_table_next; i++)
2007 if (strcmp (cp, filename_language_table[i].ext) == 0)
2008 return filename_language_table[i].lang;
2010 return language_unknown;
2015 Allocate and partly initialize a new symbol table. Return a pointer
2016 to it. error() if no space.
2018 Caller must set these fields:
2024 possibly free_named_symtabs (symtab->filename);
2028 allocate_symtab (filename, objfile)
2030 struct objfile *objfile;
2032 register struct symtab *symtab;
2034 symtab = (struct symtab *)
2035 obstack_alloc (&objfile->symbol_obstack, sizeof (struct symtab));
2036 memset (symtab, 0, sizeof (*symtab));
2037 symtab->filename = obsavestring (filename, strlen (filename),
2038 &objfile->symbol_obstack);
2039 symtab->fullname = NULL;
2040 symtab->language = deduce_language_from_filename (filename);
2041 symtab->debugformat = obsavestring ("unknown", 7,
2042 &objfile->symbol_obstack);
2044 /* Hook it to the objfile it comes from */
2046 symtab->objfile = objfile;
2047 symtab->next = objfile->symtabs;
2048 objfile->symtabs = symtab;
2050 /* FIXME: This should go away. It is only defined for the Z8000,
2051 and the Z8000 definition of this macro doesn't have anything to
2052 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
2053 here for convenience. */
2054 #ifdef INIT_EXTRA_SYMTAB_INFO
2055 INIT_EXTRA_SYMTAB_INFO (symtab);
2061 struct partial_symtab *
2062 allocate_psymtab (filename, objfile)
2064 struct objfile *objfile;
2066 struct partial_symtab *psymtab;
2068 if (objfile->free_psymtabs)
2070 psymtab = objfile->free_psymtabs;
2071 objfile->free_psymtabs = psymtab->next;
2074 psymtab = (struct partial_symtab *)
2075 obstack_alloc (&objfile->psymbol_obstack,
2076 sizeof (struct partial_symtab));
2078 memset (psymtab, 0, sizeof (struct partial_symtab));
2079 psymtab->filename = obsavestring (filename, strlen (filename),
2080 &objfile->psymbol_obstack);
2081 psymtab->symtab = NULL;
2083 /* Prepend it to the psymtab list for the objfile it belongs to.
2084 Psymtabs are searched in most recent inserted -> least recent
2087 psymtab->objfile = objfile;
2088 psymtab->next = objfile->psymtabs;
2089 objfile->psymtabs = psymtab;
2092 struct partial_symtab **prev_pst;
2093 psymtab->objfile = objfile;
2094 psymtab->next = NULL;
2095 prev_pst = &(objfile->psymtabs);
2096 while ((*prev_pst) != NULL)
2097 prev_pst = &((*prev_pst)->next);
2098 (*prev_pst) = psymtab;
2106 discard_psymtab (pst)
2107 struct partial_symtab *pst;
2109 struct partial_symtab **prev_pst;
2112 Empty psymtabs happen as a result of header files which don't
2113 have any symbols in them. There can be a lot of them. But this
2114 check is wrong, in that a psymtab with N_SLINE entries but
2115 nothing else is not empty, but we don't realize that. Fixing
2116 that without slowing things down might be tricky. */
2118 /* First, snip it out of the psymtab chain */
2120 prev_pst = &(pst->objfile->psymtabs);
2121 while ((*prev_pst) != pst)
2122 prev_pst = &((*prev_pst)->next);
2123 (*prev_pst) = pst->next;
2125 /* Next, put it on a free list for recycling */
2127 pst->next = pst->objfile->free_psymtabs;
2128 pst->objfile->free_psymtabs = pst;
2132 /* Reset all data structures in gdb which may contain references to symbol
2136 clear_symtab_users ()
2138 /* Someday, we should do better than this, by only blowing away
2139 the things that really need to be blown. */
2140 clear_value_history ();
2142 clear_internalvars ();
2143 breakpoint_re_set ();
2144 set_default_breakpoint (0, 0, 0, 0);
2145 current_source_symtab = 0;
2146 current_source_line = 0;
2147 clear_pc_function_cache ();
2148 if (target_new_objfile_hook)
2149 target_new_objfile_hook (NULL);
2152 /* clear_symtab_users_once:
2154 This function is run after symbol reading, or from a cleanup.
2155 If an old symbol table was obsoleted, the old symbol table
2156 has been blown away, but the other GDB data structures that may
2157 reference it have not yet been cleared or re-directed. (The old
2158 symtab was zapped, and the cleanup queued, in free_named_symtab()
2161 This function can be queued N times as a cleanup, or called
2162 directly; it will do all the work the first time, and then will be a
2163 no-op until the next time it is queued. This works by bumping a
2164 counter at queueing time. Much later when the cleanup is run, or at
2165 the end of symbol processing (in case the cleanup is discarded), if
2166 the queued count is greater than the "done-count", we do the work
2167 and set the done-count to the queued count. If the queued count is
2168 less than or equal to the done-count, we just ignore the call. This
2169 is needed because reading a single .o file will often replace many
2170 symtabs (one per .h file, for example), and we don't want to reset
2171 the breakpoints N times in the user's face.
2173 The reason we both queue a cleanup, and call it directly after symbol
2174 reading, is because the cleanup protects us in case of errors, but is
2175 discarded if symbol reading is successful. */
2178 /* FIXME: As free_named_symtabs is currently a big noop this function
2179 is no longer needed. */
2181 clear_symtab_users_once PARAMS ((void));
2183 static int clear_symtab_users_queued;
2184 static int clear_symtab_users_done;
2187 clear_symtab_users_once ()
2189 /* Enforce once-per-`do_cleanups'-semantics */
2190 if (clear_symtab_users_queued <= clear_symtab_users_done)
2192 clear_symtab_users_done = clear_symtab_users_queued;
2194 clear_symtab_users ();
2198 /* Delete the specified psymtab, and any others that reference it. */
2201 cashier_psymtab (pst)
2202 struct partial_symtab *pst;
2204 struct partial_symtab *ps, *pprev = NULL;
2207 /* Find its previous psymtab in the chain */
2208 for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
2217 /* Unhook it from the chain. */
2218 if (ps == pst->objfile->psymtabs)
2219 pst->objfile->psymtabs = ps->next;
2221 pprev->next = ps->next;
2223 /* FIXME, we can't conveniently deallocate the entries in the
2224 partial_symbol lists (global_psymbols/static_psymbols) that
2225 this psymtab points to. These just take up space until all
2226 the psymtabs are reclaimed. Ditto the dependencies list and
2227 filename, which are all in the psymbol_obstack. */
2229 /* We need to cashier any psymtab that has this one as a dependency... */
2231 for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
2233 for (i = 0; i < ps->number_of_dependencies; i++)
2235 if (ps->dependencies[i] == pst)
2237 cashier_psymtab (ps);
2238 goto again; /* Must restart, chain has been munged. */
2245 /* If a symtab or psymtab for filename NAME is found, free it along
2246 with any dependent breakpoints, displays, etc.
2247 Used when loading new versions of object modules with the "add-file"
2248 command. This is only called on the top-level symtab or psymtab's name;
2249 it is not called for subsidiary files such as .h files.
2251 Return value is 1 if we blew away the environment, 0 if not.
2252 FIXME. The return valu appears to never be used.
2254 FIXME. I think this is not the best way to do this. We should
2255 work on being gentler to the environment while still cleaning up
2256 all stray pointers into the freed symtab. */
2259 free_named_symtabs (name)
2263 /* FIXME: With the new method of each objfile having it's own
2264 psymtab list, this function needs serious rethinking. In particular,
2265 why was it ever necessary to toss psymtabs with specific compilation
2266 unit filenames, as opposed to all psymtabs from a particular symbol
2268 Well, the answer is that some systems permit reloading of particular
2269 compilation units. We want to blow away any old info about these
2270 compilation units, regardless of which objfiles they arrived in. --gnu. */
2272 register struct symtab *s;
2273 register struct symtab *prev;
2274 register struct partial_symtab *ps;
2275 struct blockvector *bv;
2278 /* We only wack things if the symbol-reload switch is set. */
2279 if (!symbol_reloading)
2282 /* Some symbol formats have trouble providing file names... */
2283 if (name == 0 || *name == '\0')
2286 /* Look for a psymtab with the specified name. */
2289 for (ps = partial_symtab_list; ps; ps = ps->next)
2291 if (STREQ (name, ps->filename))
2293 cashier_psymtab (ps); /* Blow it away...and its little dog, too. */
2294 goto again2; /* Must restart, chain has been munged */
2298 /* Look for a symtab with the specified name. */
2300 for (s = symtab_list; s; s = s->next)
2302 if (STREQ (name, s->filename))
2309 if (s == symtab_list)
2310 symtab_list = s->next;
2312 prev->next = s->next;
2314 /* For now, queue a delete for all breakpoints, displays, etc., whether
2315 or not they depend on the symtab being freed. This should be
2316 changed so that only those data structures affected are deleted. */
2318 /* But don't delete anything if the symtab is empty.
2319 This test is necessary due to a bug in "dbxread.c" that
2320 causes empty symtabs to be created for N_SO symbols that
2321 contain the pathname of the object file. (This problem
2322 has been fixed in GDB 3.9x). */
2324 bv = BLOCKVECTOR (s);
2325 if (BLOCKVECTOR_NBLOCKS (bv) > 2
2326 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK))
2327 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)))
2329 complain (&oldsyms_complaint, name);
2331 clear_symtab_users_queued++;
2332 make_cleanup (clear_symtab_users_once, 0);
2337 complain (&empty_symtab_complaint, name);
2344 /* It is still possible that some breakpoints will be affected
2345 even though no symtab was found, since the file might have
2346 been compiled without debugging, and hence not be associated
2347 with a symtab. In order to handle this correctly, we would need
2348 to keep a list of text address ranges for undebuggable files.
2349 For now, we do nothing, since this is a fairly obscure case. */
2353 /* FIXME, what about the minimal symbol table? */
2360 /* Allocate and partially fill a partial symtab. It will be
2361 completely filled at the end of the symbol list.
2363 FILENAME is the name of the symbol-file we are reading from. */
2365 struct partial_symtab *
2366 start_psymtab_common (objfile, section_offsets,
2367 filename, textlow, global_syms, static_syms)
2368 struct objfile *objfile;
2369 struct section_offsets *section_offsets;
2372 struct partial_symbol **global_syms;
2373 struct partial_symbol **static_syms;
2375 struct partial_symtab *psymtab;
2377 psymtab = allocate_psymtab (filename, objfile);
2378 psymtab->section_offsets = section_offsets;
2379 psymtab->textlow = textlow;
2380 psymtab->texthigh = psymtab->textlow; /* default */
2381 psymtab->globals_offset = global_syms - objfile->global_psymbols.list;
2382 psymtab->statics_offset = static_syms - objfile->static_psymbols.list;
2386 /* Add a symbol with a long value to a psymtab.
2387 Since one arg is a struct, we pass in a ptr and deref it (sigh). */
2390 add_psymbol_to_list (name, namelength, namespace, class, list, val, coreaddr,
2394 namespace_enum namespace;
2395 enum address_class class;
2396 struct psymbol_allocation_list *list;
2397 long val; /* Value as a long */
2398 CORE_ADDR coreaddr; /* Value as a CORE_ADDR */
2399 enum language language;
2400 struct objfile *objfile;
2402 register struct partial_symbol *psym;
2403 char *buf = alloca (namelength + 1);
2404 /* psymbol is static so that there will be no uninitialized gaps in the
2405 structure which might contain random data, causing cache misses in
2407 static struct partial_symbol psymbol;
2409 /* Create local copy of the partial symbol */
2410 memcpy (buf, name, namelength);
2411 buf[namelength] = '\0';
2412 SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, &objfile->psymbol_cache);
2413 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2416 SYMBOL_VALUE (&psymbol) = val;
2420 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
2422 SYMBOL_SECTION (&psymbol) = 0;
2423 SYMBOL_LANGUAGE (&psymbol) = language;
2424 PSYMBOL_NAMESPACE (&psymbol) = namespace;
2425 PSYMBOL_CLASS (&psymbol) = class;
2426 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language);
2428 /* Stash the partial symbol away in the cache */
2429 psym = bcache (&psymbol, sizeof (struct partial_symbol), &objfile->psymbol_cache);
2431 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2432 if (list->next >= list->list + list->size)
2434 extend_psymbol_list (list, objfile);
2436 *list->next++ = psym;
2437 OBJSTAT (objfile, n_psyms++);
2440 /* Add a symbol with a long value to a psymtab. This differs from
2441 * add_psymbol_to_list above in taking both a mangled and a demangled
2445 add_psymbol_with_dem_name_to_list (name, namelength, dem_name, dem_namelength,
2446 namespace, class, list, val, coreaddr, language, objfile)
2451 namespace_enum namespace;
2452 enum address_class class;
2453 struct psymbol_allocation_list *list;
2454 long val; /* Value as a long */
2455 CORE_ADDR coreaddr; /* Value as a CORE_ADDR */
2456 enum language language;
2457 struct objfile *objfile;
2459 register struct partial_symbol *psym;
2460 char *buf = alloca (namelength + 1);
2461 /* psymbol is static so that there will be no uninitialized gaps in the
2462 structure which might contain random data, causing cache misses in
2464 static struct partial_symbol psymbol;
2466 /* Create local copy of the partial symbol */
2468 memcpy (buf, name, namelength);
2469 buf[namelength] = '\0';
2470 SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, &objfile->psymbol_cache);
2472 buf = alloca (dem_namelength + 1);
2473 memcpy (buf, dem_name, dem_namelength);
2474 buf[dem_namelength] = '\0';
2479 case language_cplus:
2480 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol) =
2481 bcache (buf, dem_namelength + 1, &objfile->psymbol_cache);
2483 case language_chill:
2484 SYMBOL_CHILL_DEMANGLED_NAME (&psymbol) =
2485 bcache (buf, dem_namelength + 1, &objfile->psymbol_cache);
2487 /* FIXME What should be done for the default case? Ignoring for now. */
2490 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2493 SYMBOL_VALUE (&psymbol) = val;
2497 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
2499 SYMBOL_SECTION (&psymbol) = 0;
2500 SYMBOL_LANGUAGE (&psymbol) = language;
2501 PSYMBOL_NAMESPACE (&psymbol) = namespace;
2502 PSYMBOL_CLASS (&psymbol) = class;
2503 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language);
2505 /* Stash the partial symbol away in the cache */
2506 psym = bcache (&psymbol, sizeof (struct partial_symbol), &objfile->psymbol_cache);
2508 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2509 if (list->next >= list->list + list->size)
2511 extend_psymbol_list (list, objfile);
2513 *list->next++ = psym;
2514 OBJSTAT (objfile, n_psyms++);
2517 /* Initialize storage for partial symbols. */
2520 init_psymbol_list (objfile, total_symbols)
2521 struct objfile *objfile;
2524 /* Free any previously allocated psymbol lists. */
2526 if (objfile->global_psymbols.list)
2528 mfree (objfile->md, (PTR) objfile->global_psymbols.list);
2530 if (objfile->static_psymbols.list)
2532 mfree (objfile->md, (PTR) objfile->static_psymbols.list);
2535 /* Current best guess is that approximately a twentieth
2536 of the total symbols (in a debugging file) are global or static
2539 objfile->global_psymbols.size = total_symbols / 10;
2540 objfile->static_psymbols.size = total_symbols / 10;
2542 if (objfile->global_psymbols.size > 0)
2544 objfile->global_psymbols.next =
2545 objfile->global_psymbols.list = (struct partial_symbol **)
2546 xmmalloc (objfile->md, (objfile->global_psymbols.size
2547 * sizeof (struct partial_symbol *)));
2549 if (objfile->static_psymbols.size > 0)
2551 objfile->static_psymbols.next =
2552 objfile->static_psymbols.list = (struct partial_symbol **)
2553 xmmalloc (objfile->md, (objfile->static_psymbols.size
2554 * sizeof (struct partial_symbol *)));
2559 The following code implements an abstraction for debugging overlay sections.
2561 The target model is as follows:
2562 1) The gnu linker will permit multiple sections to be mapped into the
2563 same VMA, each with its own unique LMA (or load address).
2564 2) It is assumed that some runtime mechanism exists for mapping the
2565 sections, one by one, from the load address into the VMA address.
2566 3) This code provides a mechanism for gdb to keep track of which
2567 sections should be considered to be mapped from the VMA to the LMA.
2568 This information is used for symbol lookup, and memory read/write.
2569 For instance, if a section has been mapped then its contents
2570 should be read from the VMA, otherwise from the LMA.
2572 Two levels of debugger support for overlays are available. One is
2573 "manual", in which the debugger relies on the user to tell it which
2574 overlays are currently mapped. This level of support is
2575 implemented entirely in the core debugger, and the information about
2576 whether a section is mapped is kept in the objfile->obj_section table.
2578 The second level of support is "automatic", and is only available if
2579 the target-specific code provides functionality to read the target's
2580 overlay mapping table, and translate its contents for the debugger
2581 (by updating the mapped state information in the obj_section tables).
2583 The interface is as follows:
2585 overlay map <name> -- tell gdb to consider this section mapped
2586 overlay unmap <name> -- tell gdb to consider this section unmapped
2587 overlay list -- list the sections that GDB thinks are mapped
2588 overlay read-target -- get the target's state of what's mapped
2589 overlay off/manual/auto -- set overlay debugging state
2590 Functional interface:
2591 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2592 section, return that section.
2593 find_pc_overlay(pc): find any overlay section that contains
2594 the pc, either in its VMA or its LMA
2595 overlay_is_mapped(sect): true if overlay is marked as mapped
2596 section_is_overlay(sect): true if section's VMA != LMA
2597 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2598 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2599 overlay_mapped_address(...): map an address from section's LMA to VMA
2600 overlay_unmapped_address(...): map an address from section's VMA to LMA
2601 symbol_overlayed_address(...): Return a "current" address for symbol:
2602 either in VMA or LMA depending on whether
2603 the symbol's section is currently mapped
2606 /* Overlay debugging state: */
2608 int overlay_debugging = 0; /* 0 == off, 1 == manual, -1 == auto */
2609 int overlay_cache_invalid = 0; /* True if need to refresh mapped state */
2611 /* Target vector for refreshing overlay mapped state */
2612 static void simple_overlay_update PARAMS ((struct obj_section *));
2613 void (*target_overlay_update) PARAMS ((struct obj_section *))
2614 = simple_overlay_update;
2616 /* Function: section_is_overlay (SECTION)
2617 Returns true if SECTION has VMA not equal to LMA, ie.
2618 SECTION is loaded at an address different from where it will "run". */
2621 section_is_overlay (section)
2624 if (overlay_debugging)
2625 if (section && section->lma != 0 &&
2626 section->vma != section->lma)
2632 /* Function: overlay_invalidate_all (void)
2633 Invalidate the mapped state of all overlay sections (mark it as stale). */
2636 overlay_invalidate_all ()
2638 struct objfile *objfile;
2639 struct obj_section *sect;
2641 ALL_OBJSECTIONS (objfile, sect)
2642 if (section_is_overlay (sect->the_bfd_section))
2643 sect->ovly_mapped = -1;
2646 /* Function: overlay_is_mapped (SECTION)
2647 Returns true if section is an overlay, and is currently mapped.
2648 Private: public access is thru function section_is_mapped.
2650 Access to the ovly_mapped flag is restricted to this function, so
2651 that we can do automatic update. If the global flag
2652 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2653 overlay_invalidate_all. If the mapped state of the particular
2654 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2657 overlay_is_mapped (osect)
2658 struct obj_section *osect;
2660 if (osect == 0 || !section_is_overlay (osect->the_bfd_section))
2663 switch (overlay_debugging)
2667 return 0; /* overlay debugging off */
2668 case -1: /* overlay debugging automatic */
2669 /* Unles there is a target_overlay_update function,
2670 there's really nothing useful to do here (can't really go auto) */
2671 if (target_overlay_update)
2673 if (overlay_cache_invalid)
2675 overlay_invalidate_all ();
2676 overlay_cache_invalid = 0;
2678 if (osect->ovly_mapped == -1)
2679 (*target_overlay_update) (osect);
2681 /* fall thru to manual case */
2682 case 1: /* overlay debugging manual */
2683 return osect->ovly_mapped == 1;
2687 /* Function: section_is_mapped
2688 Returns true if section is an overlay, and is currently mapped. */
2691 section_is_mapped (section)
2694 struct objfile *objfile;
2695 struct obj_section *osect;
2697 if (overlay_debugging)
2698 if (section && section_is_overlay (section))
2699 ALL_OBJSECTIONS (objfile, osect)
2700 if (osect->the_bfd_section == section)
2701 return overlay_is_mapped (osect);
2706 /* Function: pc_in_unmapped_range
2707 If PC falls into the lma range of SECTION, return true, else false. */
2710 pc_in_unmapped_range (pc, section)
2716 if (overlay_debugging)
2717 if (section && section_is_overlay (section))
2719 size = bfd_get_section_size_before_reloc (section);
2720 if (section->lma <= pc && pc < section->lma + size)
2726 /* Function: pc_in_mapped_range
2727 If PC falls into the vma range of SECTION, return true, else false. */
2730 pc_in_mapped_range (pc, section)
2736 if (overlay_debugging)
2737 if (section && section_is_overlay (section))
2739 size = bfd_get_section_size_before_reloc (section);
2740 if (section->vma <= pc && pc < section->vma + size)
2746 /* Function: overlay_unmapped_address (PC, SECTION)
2747 Returns the address corresponding to PC in the unmapped (load) range.
2748 May be the same as PC. */
2751 overlay_unmapped_address (pc, section)
2755 if (overlay_debugging)
2756 if (section && section_is_overlay (section) &&
2757 pc_in_mapped_range (pc, section))
2758 return pc + section->lma - section->vma;
2763 /* Function: overlay_mapped_address (PC, SECTION)
2764 Returns the address corresponding to PC in the mapped (runtime) range.
2765 May be the same as PC. */
2768 overlay_mapped_address (pc, section)
2772 if (overlay_debugging)
2773 if (section && section_is_overlay (section) &&
2774 pc_in_unmapped_range (pc, section))
2775 return pc + section->vma - section->lma;
2781 /* Function: symbol_overlayed_address
2782 Return one of two addresses (relative to the VMA or to the LMA),
2783 depending on whether the section is mapped or not. */
2786 symbol_overlayed_address (address, section)
2790 if (overlay_debugging)
2792 /* If the symbol has no section, just return its regular address. */
2795 /* If the symbol's section is not an overlay, just return its address */
2796 if (!section_is_overlay (section))
2798 /* If the symbol's section is mapped, just return its address */
2799 if (section_is_mapped (section))
2802 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
2803 * then return its LOADED address rather than its vma address!!
2805 return overlay_unmapped_address (address, section);
2810 /* Function: find_pc_overlay (PC)
2811 Return the best-match overlay section for PC:
2812 If PC matches a mapped overlay section's VMA, return that section.
2813 Else if PC matches an unmapped section's VMA, return that section.
2814 Else if PC matches an unmapped section's LMA, return that section. */
2817 find_pc_overlay (pc)
2820 struct objfile *objfile;
2821 struct obj_section *osect, *best_match = NULL;
2823 if (overlay_debugging)
2824 ALL_OBJSECTIONS (objfile, osect)
2825 if (section_is_overlay (osect->the_bfd_section))
2827 if (pc_in_mapped_range (pc, osect->the_bfd_section))
2829 if (overlay_is_mapped (osect))
2830 return osect->the_bfd_section;
2834 else if (pc_in_unmapped_range (pc, osect->the_bfd_section))
2837 return best_match ? best_match->the_bfd_section : NULL;
2840 /* Function: find_pc_mapped_section (PC)
2841 If PC falls into the VMA address range of an overlay section that is
2842 currently marked as MAPPED, return that section. Else return NULL. */
2845 find_pc_mapped_section (pc)
2848 struct objfile *objfile;
2849 struct obj_section *osect;
2851 if (overlay_debugging)
2852 ALL_OBJSECTIONS (objfile, osect)
2853 if (pc_in_mapped_range (pc, osect->the_bfd_section) &&
2854 overlay_is_mapped (osect))
2855 return osect->the_bfd_section;
2860 /* Function: list_overlays_command
2861 Print a list of mapped sections and their PC ranges */
2864 list_overlays_command (args, from_tty)
2869 struct objfile *objfile;
2870 struct obj_section *osect;
2872 if (overlay_debugging)
2873 ALL_OBJSECTIONS (objfile, osect)
2874 if (overlay_is_mapped (osect))
2880 vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section);
2881 lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section);
2882 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
2883 name = bfd_section_name (objfile->obfd, osect->the_bfd_section);
2885 printf_filtered ("Section %s, loaded at ", name);
2886 print_address_numeric (lma, 1, gdb_stdout);
2887 puts_filtered (" - ");
2888 print_address_numeric (lma + size, 1, gdb_stdout);
2889 printf_filtered (", mapped at ");
2890 print_address_numeric (vma, 1, gdb_stdout);
2891 puts_filtered (" - ");
2892 print_address_numeric (vma + size, 1, gdb_stdout);
2893 puts_filtered ("\n");
2898 printf_filtered ("No sections are mapped.\n");
2901 /* Function: map_overlay_command
2902 Mark the named section as mapped (ie. residing at its VMA address). */
2905 map_overlay_command (args, from_tty)
2909 struct objfile *objfile, *objfile2;
2910 struct obj_section *sec, *sec2;
2913 if (!overlay_debugging)
2915 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
2916 the 'overlay manual' command.");
2918 if (args == 0 || *args == 0)
2919 error ("Argument required: name of an overlay section");
2921 /* First, find a section matching the user supplied argument */
2922 ALL_OBJSECTIONS (objfile, sec)
2923 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
2925 /* Now, check to see if the section is an overlay. */
2926 bfdsec = sec->the_bfd_section;
2927 if (!section_is_overlay (bfdsec))
2928 continue; /* not an overlay section */
2930 /* Mark the overlay as "mapped" */
2931 sec->ovly_mapped = 1;
2933 /* Next, make a pass and unmap any sections that are
2934 overlapped by this new section: */
2935 ALL_OBJSECTIONS (objfile2, sec2)
2936 if (sec2->ovly_mapped &&
2938 sec->the_bfd_section != sec2->the_bfd_section &&
2939 (pc_in_mapped_range (sec2->addr, sec->the_bfd_section) ||
2940 pc_in_mapped_range (sec2->endaddr, sec->the_bfd_section)))
2943 printf_filtered ("Note: section %s unmapped by overlap\n",
2944 bfd_section_name (objfile->obfd,
2945 sec2->the_bfd_section));
2946 sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2 */
2950 error ("No overlay section called %s", args);
2953 /* Function: unmap_overlay_command
2954 Mark the overlay section as unmapped
2955 (ie. resident in its LMA address range, rather than the VMA range). */
2958 unmap_overlay_command (args, from_tty)
2962 struct objfile *objfile;
2963 struct obj_section *sec;
2965 if (!overlay_debugging)
2967 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
2968 the 'overlay manual' command.");
2970 if (args == 0 || *args == 0)
2971 error ("Argument required: name of an overlay section");
2973 /* First, find a section matching the user supplied argument */
2974 ALL_OBJSECTIONS (objfile, sec)
2975 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
2977 if (!sec->ovly_mapped)
2978 error ("Section %s is not mapped", args);
2979 sec->ovly_mapped = 0;
2982 error ("No overlay section called %s", args);
2985 /* Function: overlay_auto_command
2986 A utility command to turn on overlay debugging.
2987 Possibly this should be done via a set/show command. */
2990 overlay_auto_command (args, from_tty)
2994 overlay_debugging = -1;
2996 printf_filtered ("Automatic overlay debugging enabled.");
2999 /* Function: overlay_manual_command
3000 A utility command to turn on overlay debugging.
3001 Possibly this should be done via a set/show command. */
3004 overlay_manual_command (args, from_tty)
3008 overlay_debugging = 1;
3010 printf_filtered ("Overlay debugging enabled.");
3013 /* Function: overlay_off_command
3014 A utility command to turn on overlay debugging.
3015 Possibly this should be done via a set/show command. */
3018 overlay_off_command (args, from_tty)
3022 overlay_debugging = 0;
3024 printf_filtered ("Overlay debugging disabled.");
3028 overlay_load_command (args, from_tty)
3032 if (target_overlay_update)
3033 (*target_overlay_update) (NULL);
3035 error ("This target does not know how to read its overlay state.");
3038 /* Function: overlay_command
3039 A place-holder for a mis-typed command */
3041 /* Command list chain containing all defined "overlay" subcommands. */
3042 struct cmd_list_element *overlaylist;
3045 overlay_command (args, from_tty)
3050 ("\"overlay\" must be followed by the name of an overlay command.\n");
3051 help_list (overlaylist, "overlay ", -1, gdb_stdout);
3055 /* Target Overlays for the "Simplest" overlay manager:
3057 This is GDB's default target overlay layer. It works with the
3058 minimal overlay manager supplied as an example by Cygnus. The
3059 entry point is via a function pointer "target_overlay_update",
3060 so targets that use a different runtime overlay manager can
3061 substitute their own overlay_update function and take over the
3064 The overlay_update function pokes around in the target's data structures
3065 to see what overlays are mapped, and updates GDB's overlay mapping with
3068 In this simple implementation, the target data structures are as follows:
3069 unsigned _novlys; /# number of overlay sections #/
3070 unsigned _ovly_table[_novlys][4] = {
3071 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3072 {..., ..., ..., ...},
3074 unsigned _novly_regions; /# number of overlay regions #/
3075 unsigned _ovly_region_table[_novly_regions][3] = {
3076 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3079 These functions will attempt to update GDB's mappedness state in the
3080 symbol section table, based on the target's mappedness state.
3082 To do this, we keep a cached copy of the target's _ovly_table, and
3083 attempt to detect when the cached copy is invalidated. The main
3084 entry point is "simple_overlay_update(SECT), which looks up SECT in
3085 the cached table and re-reads only the entry for that section from
3086 the target (whenever possible).
3089 /* Cached, dynamically allocated copies of the target data structures: */
3090 static unsigned (*cache_ovly_table)[4] = 0;
3092 static unsigned (*cache_ovly_region_table)[3] = 0;
3094 static unsigned cache_novlys = 0;
3096 static unsigned cache_novly_regions = 0;
3098 static CORE_ADDR cache_ovly_table_base = 0;
3100 static CORE_ADDR cache_ovly_region_table_base = 0;
3104 VMA, SIZE, LMA, MAPPED
3106 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
3108 /* Throw away the cached copy of _ovly_table */
3110 simple_free_overlay_table ()
3112 if (cache_ovly_table)
3113 free (cache_ovly_table);
3115 cache_ovly_table = NULL;
3116 cache_ovly_table_base = 0;
3120 /* Throw away the cached copy of _ovly_region_table */
3122 simple_free_overlay_region_table ()
3124 if (cache_ovly_region_table)
3125 free (cache_ovly_region_table);
3126 cache_novly_regions = 0;
3127 cache_ovly_region_table = NULL;
3128 cache_ovly_region_table_base = 0;
3132 /* Read an array of ints from the target into a local buffer.
3133 Convert to host order. int LEN is number of ints */
3135 read_target_long_array (memaddr, myaddr, len)
3137 unsigned int *myaddr;
3140 char *buf = alloca (len * TARGET_LONG_BYTES);
3143 read_memory (memaddr, buf, len * TARGET_LONG_BYTES);
3144 for (i = 0; i < len; i++)
3145 myaddr[i] = extract_unsigned_integer (TARGET_LONG_BYTES * i + buf,
3149 /* Find and grab a copy of the target _ovly_table
3150 (and _novlys, which is needed for the table's size) */
3152 simple_read_overlay_table ()
3154 struct minimal_symbol *msym;
3156 simple_free_overlay_table ();
3157 msym = lookup_minimal_symbol ("_novlys", 0, 0);
3159 cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4);
3161 return 0; /* failure */
3162 cache_ovly_table = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table));
3163 if (cache_ovly_table != NULL)
3165 msym = lookup_minimal_symbol ("_ovly_table", 0, 0);
3168 cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (msym);
3169 read_target_long_array (cache_ovly_table_base,
3170 (int *) cache_ovly_table,
3174 return 0; /* failure */
3177 return 0; /* failure */
3178 return 1; /* SUCCESS */
3182 /* Find and grab a copy of the target _ovly_region_table
3183 (and _novly_regions, which is needed for the table's size) */
3185 simple_read_overlay_region_table ()
3187 struct minimal_symbol *msym;
3189 simple_free_overlay_region_table ();
3190 msym = lookup_minimal_symbol ("_novly_regions", 0, 0);
3192 cache_novly_regions = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4);
3194 return 0; /* failure */
3195 cache_ovly_region_table = (void *) xmalloc (cache_novly_regions * 12);
3196 if (cache_ovly_region_table != NULL)
3198 msym = lookup_minimal_symbol ("_ovly_region_table", 0, 0);
3201 cache_ovly_region_table_base = SYMBOL_VALUE_ADDRESS (msym);
3202 read_target_long_array (cache_ovly_region_table_base,
3203 (int *) cache_ovly_region_table,
3204 cache_novly_regions * 3);
3207 return 0; /* failure */
3210 return 0; /* failure */
3211 return 1; /* SUCCESS */
3215 /* Function: simple_overlay_update_1
3216 A helper function for simple_overlay_update. Assuming a cached copy
3217 of _ovly_table exists, look through it to find an entry whose vma,
3218 lma and size match those of OSECT. Re-read the entry and make sure
3219 it still matches OSECT (else the table may no longer be valid).
3220 Set OSECT's mapped state to match the entry. Return: 1 for
3221 success, 0 for failure. */
3224 simple_overlay_update_1 (osect)
3225 struct obj_section *osect;
3229 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
3230 for (i = 0; i < cache_novlys; i++)
3231 if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma &&
3232 cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* &&
3233 cache_ovly_table[i][SIZE] == size */ )
3235 read_target_long_array (cache_ovly_table_base + i * TARGET_LONG_BYTES,
3236 (int *) cache_ovly_table[i], 4);
3237 if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma &&
3238 cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* &&
3239 cache_ovly_table[i][SIZE] == size */ )
3241 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3244 else /* Warning! Warning! Target's ovly table has changed! */
3250 /* Function: simple_overlay_update
3251 If OSECT is NULL, then update all sections' mapped state
3252 (after re-reading the entire target _ovly_table).
3253 If OSECT is non-NULL, then try to find a matching entry in the
3254 cached ovly_table and update only OSECT's mapped state.
3255 If a cached entry can't be found or the cache isn't valid, then
3256 re-read the entire cache, and go ahead and update all sections. */
3259 simple_overlay_update (osect)
3260 struct obj_section *osect;
3262 struct objfile *objfile;
3264 /* Were we given an osect to look up? NULL means do all of them. */
3266 /* Have we got a cached copy of the target's overlay table? */
3267 if (cache_ovly_table != NULL)
3268 /* Does its cached location match what's currently in the symtab? */
3269 if (cache_ovly_table_base ==
3270 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", 0, 0)))
3271 /* Then go ahead and try to look up this single section in the cache */
3272 if (simple_overlay_update_1 (osect))
3273 /* Found it! We're done. */
3276 /* Cached table no good: need to read the entire table anew.
3277 Or else we want all the sections, in which case it's actually
3278 more efficient to read the whole table in one block anyway. */
3280 if (simple_read_overlay_table () == 0) /* read failed? No table? */
3282 warning ("Failed to read the target overlay mapping table.");
3285 /* Now may as well update all sections, even if only one was requested. */
3286 ALL_OBJSECTIONS (objfile, osect)
3287 if (section_is_overlay (osect->the_bfd_section))
3291 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
3292 for (i = 0; i < cache_novlys; i++)
3293 if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma &&
3294 cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* &&
3295 cache_ovly_table[i][SIZE] == size */ )
3296 { /* obj_section matches i'th entry in ovly_table */
3297 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3298 break; /* finished with inner for loop: break out */
3305 _initialize_symfile ()
3307 struct cmd_list_element *c;
3309 c = add_cmd ("symbol-file", class_files, symbol_file_command,
3310 "Load symbol table from executable file FILE.\n\
3311 The `file' command can also load symbol tables, as well as setting the file\n\
3312 to execute.", &cmdlist);
3313 c->completer = filename_completer;
3315 c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command,
3316 "Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3317 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3318 ADDR is the starting address of the file's text.\n\
3319 The optional arguments are section-name section-address pairs and\n\
3320 should be specified if the data and bss segments are not contiguous\n\
3321 with the text. SECT is a section name to be loaded at SECT_ADDR.",
3323 c->completer = filename_completer;
3325 c = add_cmd ("add-shared-symbol-files", class_files,
3326 add_shared_symbol_files_command,
3327 "Load the symbols from shared objects in the dynamic linker's link map.",
3329 c = add_alias_cmd ("assf", "add-shared-symbol-files", class_files, 1,
3332 c = add_cmd ("load", class_files, load_command,
3333 "Dynamically load FILE into the running program, and record its symbols\n\
3334 for access from GDB.", &cmdlist);
3335 c->completer = filename_completer;
3338 (add_set_cmd ("symbol-reloading", class_support, var_boolean,
3339 (char *) &symbol_reloading,
3340 "Set dynamic symbol table reloading multiple times in one run.",
3344 add_prefix_cmd ("overlay", class_support, overlay_command,
3345 "Commands for debugging overlays.", &overlaylist,
3346 "overlay ", 0, &cmdlist);
3348 add_com_alias ("ovly", "overlay", class_alias, 1);
3349 add_com_alias ("ov", "overlay", class_alias, 1);
3351 add_cmd ("map-overlay", class_support, map_overlay_command,
3352 "Assert that an overlay section is mapped.", &overlaylist);
3354 add_cmd ("unmap-overlay", class_support, unmap_overlay_command,
3355 "Assert that an overlay section is unmapped.", &overlaylist);
3357 add_cmd ("list-overlays", class_support, list_overlays_command,
3358 "List mappings of overlay sections.", &overlaylist);
3360 add_cmd ("manual", class_support, overlay_manual_command,
3361 "Enable overlay debugging.", &overlaylist);
3362 add_cmd ("off", class_support, overlay_off_command,
3363 "Disable overlay debugging.", &overlaylist);
3364 add_cmd ("auto", class_support, overlay_auto_command,
3365 "Enable automatic overlay debugging.", &overlaylist);
3366 add_cmd ("load-target", class_support, overlay_load_command,
3367 "Read the overlay mapping state from the target.", &overlaylist);
3369 /* Filename extension to source language lookup table: */
3370 init_filename_language_table ();
3371 c = add_set_cmd ("extension-language", class_files, var_string_noescape,
3373 "Set mapping between filename extension and source language.\n\
3374 Usage: set extension-language .foo bar",
3376 c->function.cfunc = set_ext_lang_command;
3378 add_info ("extensions", info_ext_lang_command,
3379 "All filename extensions associated with a source language.");
3382 (add_set_cmd ("download-write-size", class_obscure,
3383 var_integer, (char *) &download_write_size,
3384 "Set the write size used when downloading a program.\n"
3385 "Only used when downloading a program onto a remote\n"
3386 "target. Specify zero, or a negative value, to disable\n"
3387 "blocked writes. The actual size of each transfer is also\n"
3388 "limited by the size of the target packet and the memory\n"