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) (char *);
72 void (*post_add_symbol_hook) (void);
73 void (*target_new_objfile_hook) (struct objfile *);
75 static void clear_symtab_users_cleanup (void *ignore);
77 /* Global variables owned by this file */
78 int readnow_symbol_files; /* Read full symbols immediately */
80 struct complaint oldsyms_complaint =
82 "Replacing old symbols for `%s'", 0, 0
85 struct complaint empty_symtab_complaint =
87 "Empty symbol table found for `%s'", 0, 0
90 struct complaint unknown_option_complaint =
92 "Unknown option `%s' ignored", 0, 0
95 /* External variables and functions referenced. */
97 extern int info_verbose;
99 extern void report_transfer_performance (unsigned long, time_t, time_t);
101 /* Functions this file defines */
104 static int simple_read_overlay_region_table (void);
105 static void simple_free_overlay_region_table (void);
108 static void set_initial_language (void);
110 static void load_command (char *, int);
112 static void add_symbol_file_command (char *, int);
114 static void add_shared_symbol_files_command (char *, int);
116 static void cashier_psymtab (struct partial_symtab *);
118 static int compare_psymbols (const void *, const void *);
120 static int compare_symbols (const void *, const void *);
122 bfd *symfile_bfd_open (char *);
124 static void find_sym_fns (struct objfile *);
126 static void decrement_reading_symtab (void *);
128 static void overlay_invalidate_all (void);
130 static int overlay_is_mapped (struct obj_section *);
132 void list_overlays_command (char *, int);
134 void map_overlay_command (char *, int);
136 void unmap_overlay_command (char *, int);
138 static void overlay_auto_command (char *, int);
140 static void overlay_manual_command (char *, int);
142 static void overlay_off_command (char *, int);
144 static void overlay_load_command (char *, int);
146 static void overlay_command (char *, int);
148 static void simple_free_overlay_table (void);
150 static void read_target_long_array (CORE_ADDR, unsigned int *, int);
152 static int simple_read_overlay_table (void);
154 static int simple_overlay_update_1 (struct obj_section *);
156 static void add_filename_language (char *ext, enum language lang);
158 static void set_ext_lang_command (char *args, int from_tty);
160 static void info_ext_lang_command (char *args, int from_tty);
162 static void init_filename_language_table (void);
164 void _initialize_symfile (void);
166 /* List of all available sym_fns. On gdb startup, each object file reader
167 calls add_symtab_fns() to register information on each format it is
170 static struct sym_fns *symtab_fns = NULL;
172 /* Flag for whether user will be reloading symbols multiple times.
173 Defaults to ON for VxWorks, otherwise OFF. */
175 #ifdef SYMBOL_RELOADING_DEFAULT
176 int symbol_reloading = SYMBOL_RELOADING_DEFAULT;
178 int symbol_reloading = 0;
181 /* If non-zero, then on HP-UX (i.e., platforms that use somsolib.c),
182 this variable is interpreted as a threshhold. If adding a new
183 library's symbol table to those already known to the debugger would
184 exceed this threshhold, then the shlib's symbols are not added.
186 If non-zero on other platforms, shared library symbols will be added
187 automatically when the inferior is created, new libraries are loaded,
188 or when attaching to the inferior. This is almost always what users
189 will want to have happen; but for very large programs, the startup
190 time will be excessive, and so if this is a problem, the user can
191 clear this flag and then add the shared library symbols as needed.
192 Note that there is a potential for confusion, since if the shared
193 library symbols are not loaded, commands like "info fun" will *not*
194 report all the functions that are actually present.
196 Note that HP-UX interprets this variable to mean, "threshhold size
197 in megabytes, where zero means never add". Other platforms interpret
198 this variable to mean, "always add if non-zero, never add if zero."
201 int auto_solib_add = 1;
204 /* Since this function is called from within qsort, in an ANSI environment
205 it must conform to the prototype for qsort, which specifies that the
206 comparison function takes two "void *" pointers. */
209 compare_symbols (s1p, s2p)
213 register struct symbol **s1, **s2;
215 s1 = (struct symbol **) s1p;
216 s2 = (struct symbol **) s2p;
218 return (STRCMP (SYMBOL_NAME (*s1), SYMBOL_NAME (*s2)));
225 compare_psymbols -- compare two partial symbols by name
229 Given pointers to pointers to two partial symbol table entries,
230 compare them by name and return -N, 0, or +N (ala strcmp).
231 Typically used by sorting routines like qsort().
235 Does direct compare of first two characters before punting
236 and passing to strcmp for longer compares. Note that the
237 original version had a bug whereby two null strings or two
238 identically named one character strings would return the
239 comparison of memory following the null byte.
244 compare_psymbols (s1p, s2p)
248 register char *st1 = SYMBOL_NAME (*(struct partial_symbol **) s1p);
249 register char *st2 = SYMBOL_NAME (*(struct partial_symbol **) s2p);
251 if ((st1[0] - st2[0]) || !st1[0])
253 return (st1[0] - st2[0]);
255 else if ((st1[1] - st2[1]) || !st1[1])
257 return (st1[1] - st2[1]);
261 /* Note: I replaced the STRCMP line (commented out below)
262 * with a simpler "strcmp()" which compares the 2 strings
263 * from the beginning. (STRCMP is a macro which first compares
264 * the initial characters, then falls back on strcmp).
265 * The reason is that the STRCMP line was tickling a C compiler
266 * bug on HP-UX 10.30, which is avoided with the simpler
267 * code. The performance gain from the more complicated code
268 * is negligible, given that we have already checked the
269 * initial 2 characters above. I reported the compiler bug,
270 * and once it is fixed the original line can be put back. RT
272 /* return ( STRCMP (st1 + 2, st2 + 2)); */
273 return (strcmp (st1, st2));
278 sort_pst_symbols (pst)
279 struct partial_symtab *pst;
281 /* Sort the global list; don't sort the static list */
283 qsort (pst->objfile->global_psymbols.list + pst->globals_offset,
284 pst->n_global_syms, sizeof (struct partial_symbol *),
288 /* Call sort_block_syms to sort alphabetically the symbols of one block. */
292 register struct block *b;
294 qsort (&BLOCK_SYM (b, 0), BLOCK_NSYMS (b),
295 sizeof (struct symbol *), compare_symbols);
298 /* Call sort_symtab_syms to sort alphabetically
299 the symbols of each block of one symtab. */
303 register struct symtab *s;
305 register struct blockvector *bv;
308 register struct block *b;
312 bv = BLOCKVECTOR (s);
313 nbl = BLOCKVECTOR_NBLOCKS (bv);
314 for (i = 0; i < nbl; i++)
316 b = BLOCKVECTOR_BLOCK (bv, i);
317 if (BLOCK_SHOULD_SORT (b))
322 /* Make a null terminated copy of the string at PTR with SIZE characters in
323 the obstack pointed to by OBSTACKP . Returns the address of the copy.
324 Note that the string at PTR does not have to be null terminated, I.E. it
325 may be part of a larger string and we are only saving a substring. */
328 obsavestring (ptr, size, obstackp)
331 struct obstack *obstackp;
333 register char *p = (char *) obstack_alloc (obstackp, size + 1);
334 /* Open-coded memcpy--saves function call time. These strings are usually
335 short. FIXME: Is this really still true with a compiler that can
338 register char *p1 = ptr;
339 register char *p2 = p;
340 char *end = ptr + size;
348 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
349 in the obstack pointed to by OBSTACKP. */
352 obconcat (obstackp, s1, s2, s3)
353 struct obstack *obstackp;
354 const char *s1, *s2, *s3;
356 register int len = strlen (s1) + strlen (s2) + strlen (s3) + 1;
357 register char *val = (char *) obstack_alloc (obstackp, len);
364 /* True if we are nested inside psymtab_to_symtab. */
366 int currently_reading_symtab = 0;
369 decrement_reading_symtab (dummy)
372 currently_reading_symtab--;
375 /* Get the symbol table that corresponds to a partial_symtab.
376 This is fast after the first time you do it. In fact, there
377 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
381 psymtab_to_symtab (pst)
382 register struct partial_symtab *pst;
384 /* If it's been looked up before, return it. */
388 /* If it has not yet been read in, read it. */
391 struct cleanup *back_to = make_cleanup (decrement_reading_symtab, NULL);
392 currently_reading_symtab++;
393 (*pst->read_symtab) (pst);
394 do_cleanups (back_to);
400 /* Initialize entry point information for this objfile. */
403 init_entry_point_info (objfile)
404 struct objfile *objfile;
406 /* Save startup file's range of PC addresses to help blockframe.c
407 decide where the bottom of the stack is. */
409 if (bfd_get_file_flags (objfile->obfd) & EXEC_P)
411 /* Executable file -- record its entry point so we'll recognize
412 the startup file because it contains the entry point. */
413 objfile->ei.entry_point = bfd_get_start_address (objfile->obfd);
417 /* Examination of non-executable.o files. Short-circuit this stuff. */
418 objfile->ei.entry_point = INVALID_ENTRY_POINT;
420 objfile->ei.entry_file_lowpc = INVALID_ENTRY_LOWPC;
421 objfile->ei.entry_file_highpc = INVALID_ENTRY_HIGHPC;
422 objfile->ei.entry_func_lowpc = INVALID_ENTRY_LOWPC;
423 objfile->ei.entry_func_highpc = INVALID_ENTRY_HIGHPC;
424 objfile->ei.main_func_lowpc = INVALID_ENTRY_LOWPC;
425 objfile->ei.main_func_highpc = INVALID_ENTRY_HIGHPC;
428 /* Get current entry point address. */
431 entry_point_address ()
433 return symfile_objfile ? symfile_objfile->ei.entry_point : 0;
436 /* Remember the lowest-addressed loadable section we've seen.
437 This function is called via bfd_map_over_sections.
439 In case of equal vmas, the section with the largest size becomes the
440 lowest-addressed loadable section.
442 If the vmas and sizes are equal, the last section is considered the
443 lowest-addressed loadable section. */
446 find_lowest_section (abfd, sect, obj)
451 asection **lowest = (asection **) obj;
453 if (0 == (bfd_get_section_flags (abfd, sect) & SEC_LOAD))
456 *lowest = sect; /* First loadable section */
457 else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect))
458 *lowest = sect; /* A lower loadable section */
459 else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect)
460 && (bfd_section_size (abfd, (*lowest))
461 <= bfd_section_size (abfd, sect)))
466 /* Build (allocate and populate) a section_addr_info struct from
467 an existing section table. */
469 extern struct section_addr_info *
470 build_section_addr_info_from_section_table (const struct section_table *start,
471 const struct section_table *end)
473 struct section_addr_info *sap;
474 const struct section_table *stp;
477 sap = xmalloc (sizeof (struct section_addr_info));
478 memset (sap, 0, sizeof (struct section_addr_info));
480 for (stp = start, oidx = 0; stp != end; stp++)
482 if (stp->the_bfd_section->flags & (SEC_ALLOC | SEC_LOAD)
483 && oidx < MAX_SECTIONS)
485 sap->other[oidx].addr = stp->addr;
486 sap->other[oidx].name = xstrdup (stp->the_bfd_section->name);
487 sap->other[oidx].sectindex = stp->the_bfd_section->index;
496 /* Free all memory allocated by build_section_addr_info_from_section_table. */
499 free_section_addr_info (struct section_addr_info *sap)
503 for (idx = 0; idx < MAX_SECTIONS; idx++)
504 if (sap->other[idx].name)
505 free (sap->other[idx].name);
510 /* Parse the user's idea of an offset for dynamic linking, into our idea
511 of how to represent it for fast symbol reading. This is the default
512 version of the sym_fns.sym_offsets function for symbol readers that
513 don't need to do anything special. It allocates a section_offsets table
514 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
517 default_symfile_offsets (objfile, addrs)
518 struct objfile *objfile;
519 struct section_addr_info *addrs;
522 asection *sect = NULL;
524 objfile->num_sections = SECT_OFF_MAX;
525 objfile->section_offsets = (struct section_offsets *)
526 obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS);
527 memset (objfile->section_offsets, 0, SIZEOF_SECTION_OFFSETS);
529 /* Now calculate offsets for section that were specified by the
531 for (i = 0; i < MAX_SECTIONS && addrs->other[i].name; i++)
533 struct other_sections *osp ;
535 osp = &addrs->other[i] ;
539 /* Record all sections in offsets */
540 /* The section_offsets in the objfile are here filled in using
542 ANOFFSET (objfile->section_offsets, osp->sectindex) = osp->addr;
545 /* Remember the bfd indexes for the .text, .data, .bss and
548 sect = bfd_get_section_by_name (objfile->obfd, ".text");
550 objfile->sect_index_text = sect->index;
552 sect = bfd_get_section_by_name (objfile->obfd, ".data");
554 objfile->sect_index_data = sect->index;
556 sect = bfd_get_section_by_name (objfile->obfd, ".bss");
558 objfile->sect_index_bss = sect->index;
560 sect = bfd_get_section_by_name (objfile->obfd, ".rodata");
562 objfile->sect_index_rodata = sect->index;
566 /* Process a symbol file, as either the main file or as a dynamically
569 OBJFILE is where the symbols are to be read from.
571 ADDR is the address where the text segment was loaded, unless the
572 objfile is the main symbol file, in which case it is zero.
574 MAINLINE is nonzero if this is the main symbol file, or zero if
575 it's an extra symbol file such as dynamically loaded code.
577 VERBO is nonzero if the caller has printed a verbose message about
578 the symbol reading (and complaints can be more terse about it). */
581 syms_from_objfile (objfile, addrs, mainline, verbo)
582 struct objfile *objfile;
583 struct section_addr_info *addrs;
587 asection *lower_sect;
589 CORE_ADDR lower_offset;
590 struct section_addr_info local_addr;
591 struct cleanup *old_chain;
594 /* If ADDRS is NULL, initialize the local section_addr_info struct and
595 point ADDRS to it. We now establish the convention that an addr of
596 zero means no load address was specified. */
600 memset (&local_addr, 0, sizeof (local_addr));
604 init_entry_point_info (objfile);
605 find_sym_fns (objfile);
607 /* Make sure that partially constructed symbol tables will be cleaned up
608 if an error occurs during symbol reading. */
609 old_chain = make_cleanup_free_objfile (objfile);
613 /* We will modify the main symbol table, make sure that all its users
614 will be cleaned up if an error occurs during symbol reading. */
615 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
617 /* Since no error yet, throw away the old symbol table. */
619 if (symfile_objfile != NULL)
621 free_objfile (symfile_objfile);
622 symfile_objfile = NULL;
625 /* Currently we keep symbols from the add-symbol-file command.
626 If the user wants to get rid of them, they should do "symbol-file"
627 without arguments first. Not sure this is the best behavior
630 (*objfile->sf->sym_new_init) (objfile);
633 /* Convert addr into an offset rather than an absolute address.
634 We find the lowest address of a loaded segment in the objfile,
635 and assume that <addr> is where that got loaded.
637 We no longer warn if the lowest section is not a text segment (as
638 happens for the PA64 port. */
641 /* Find lowest loadable section to be used as starting point for
642 continguous sections. FIXME!! won't work without call to find
643 .text first, but this assumes text is lowest section. */
644 lower_sect = bfd_get_section_by_name (objfile->obfd, ".text");
645 if (lower_sect == NULL)
646 bfd_map_over_sections (objfile->obfd, find_lowest_section,
648 if (lower_sect == NULL)
649 warning ("no loadable sections found in added symbol-file %s",
652 if ((bfd_get_section_flags (objfile->obfd, lower_sect) & SEC_CODE) == 0)
653 warning ("Lowest section in %s is %s at %s",
655 bfd_section_name (objfile->obfd, lower_sect),
656 paddr (bfd_section_vma (objfile->obfd, lower_sect)));
657 if (lower_sect != NULL)
658 lower_offset = bfd_section_vma (objfile->obfd, lower_sect);
662 /* Calculate offsets for the loadable sections.
663 FIXME! Sections must be in order of increasing loadable section
664 so that contiguous sections can use the lower-offset!!!
666 Adjust offsets if the segments are not contiguous.
667 If the section is contiguous, its offset should be set to
668 the offset of the highest loadable section lower than it
669 (the loadable section directly below it in memory).
670 this_offset = lower_offset = lower_addr - lower_orig_addr */
672 /* Calculate offsets for sections. */
673 for (i=0 ; i < MAX_SECTIONS && addrs->other[i].name; i++)
675 if (addrs->other[i].addr != 0)
677 sect = bfd_get_section_by_name (objfile->obfd, addrs->other[i].name);
680 addrs->other[i].addr -= bfd_section_vma (objfile->obfd, sect);
681 lower_offset = addrs->other[i].addr;
682 /* This is the index used by BFD. */
683 addrs->other[i].sectindex = sect->index ;
687 warning ("section %s not found in %s", addrs->other[i].name,
689 addrs->other[i].addr = 0;
693 addrs->other[i].addr = lower_offset;
697 /* Initialize symbol reading routines for this objfile, allow complaints to
698 appear for this new file, and record how verbose to be, then do the
699 initial symbol reading for this file. */
701 (*objfile->sf->sym_init) (objfile);
702 clear_complaints (1, verbo);
704 (*objfile->sf->sym_offsets) (objfile, addrs);
706 #ifndef IBM6000_TARGET
707 /* This is a SVR4/SunOS specific hack, I think. In any event, it
708 screws RS/6000. sym_offsets should be doing this sort of thing,
709 because it knows the mapping between bfd sections and
711 /* This is a hack. As far as I can tell, section offsets are not
712 target dependent. They are all set to addr with a couple of
713 exceptions. The exceptions are sysvr4 shared libraries, whose
714 offsets are kept in solib structures anyway and rs6000 xcoff
715 which handles shared libraries in a completely unique way.
717 Section offsets are built similarly, except that they are built
718 by adding addr in all cases because there is no clear mapping
719 from section_offsets into actual sections. Note that solib.c
720 has a different algorithm for finding section offsets.
722 These should probably all be collapsed into some target
723 independent form of shared library support. FIXME. */
727 struct obj_section *s;
729 /* Map section offsets in "addr" back to the object's
730 sections by comparing the section names with bfd's
731 section names. Then adjust the section address by
732 the offset. */ /* for gdb/13815 */
734 ALL_OBJFILE_OSECTIONS (objfile, s)
736 CORE_ADDR s_addr = 0;
740 !s_addr && i < MAX_SECTIONS && addrs->other[i].name;
742 if (strcmp (s->the_bfd_section->name, addrs->other[i].name) == 0)
743 s_addr = addrs->other[i].addr; /* end added for gdb/13815 */
745 s->addr -= s->offset;
747 s->endaddr -= s->offset;
748 s->endaddr += s_addr;
752 #endif /* not IBM6000_TARGET */
754 (*objfile->sf->sym_read) (objfile, mainline);
756 if (!have_partial_symbols () && !have_full_symbols ())
759 printf_filtered ("(no debugging symbols found)...");
763 /* Don't allow char * to have a typename (else would get caddr_t).
764 Ditto void *. FIXME: Check whether this is now done by all the
765 symbol readers themselves (many of them now do), and if so remove
768 TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0;
769 TYPE_NAME (lookup_pointer_type (builtin_type_void)) = 0;
771 /* Mark the objfile has having had initial symbol read attempted. Note
772 that this does not mean we found any symbols... */
774 objfile->flags |= OBJF_SYMS;
776 /* Discard cleanups as symbol reading was successful. */
778 discard_cleanups (old_chain);
780 /* Call this after reading in a new symbol table to give target
781 dependant code a crack at the new symbols. For instance, this
782 could be used to update the values of target-specific symbols GDB
783 needs to keep track of (such as _sigtramp, or whatever). */
785 TARGET_SYMFILE_POSTREAD (objfile);
788 /* Perform required actions after either reading in the initial
789 symbols for a new objfile, or mapping in the symbols from a reusable
793 new_symfile_objfile (objfile, mainline, verbo)
794 struct objfile *objfile;
799 /* If this is the main symbol file we have to clean up all users of the
800 old main symbol file. Otherwise it is sufficient to fixup all the
801 breakpoints that may have been redefined by this symbol file. */
804 /* OK, make it the "real" symbol file. */
805 symfile_objfile = objfile;
807 clear_symtab_users ();
811 breakpoint_re_set ();
814 /* We're done reading the symbol file; finish off complaints. */
815 clear_complaints (0, verbo);
818 /* Process a symbol file, as either the main file or as a dynamically
821 NAME is the file name (which will be tilde-expanded and made
822 absolute herein) (but we don't free or modify NAME itself).
823 FROM_TTY says how verbose to be. MAINLINE specifies whether this
824 is the main symbol file, or whether it's an extra symbol file such
825 as dynamically loaded code. If !mainline, ADDR is the address
826 where the text segment was loaded.
828 Upon success, returns a pointer to the objfile that was added.
829 Upon failure, jumps back to command level (never returns). */
832 symbol_file_add (name, from_tty, addrs, mainline, flags)
835 struct section_addr_info *addrs;
839 struct objfile *objfile;
840 struct partial_symtab *psymtab;
843 /* Open a bfd for the file, and give user a chance to burp if we'd be
844 interactively wiping out any existing symbols. */
846 abfd = symfile_bfd_open (name);
848 if ((have_full_symbols () || have_partial_symbols ())
851 && !query ("Load new symbol table from \"%s\"? ", name))
852 error ("Not confirmed.");
854 objfile = allocate_objfile (abfd, flags);
856 /* If the objfile uses a mapped symbol file, and we have a psymtab for
857 it, then skip reading any symbols at this time. */
859 if ((objfile->flags & OBJF_MAPPED) && (objfile->flags & OBJF_SYMS))
861 /* We mapped in an existing symbol table file that already has had
862 initial symbol reading performed, so we can skip that part. Notify
863 the user that instead of reading the symbols, they have been mapped.
865 if (from_tty || info_verbose)
867 printf_filtered ("Mapped symbols for %s...", name);
869 gdb_flush (gdb_stdout);
871 init_entry_point_info (objfile);
872 find_sym_fns (objfile);
876 /* We either created a new mapped symbol table, mapped an existing
877 symbol table file which has not had initial symbol reading
878 performed, or need to read an unmapped symbol table. */
879 if (from_tty || info_verbose)
881 if (pre_add_symbol_hook)
882 pre_add_symbol_hook (name);
885 printf_filtered ("Reading symbols from %s...", name);
887 gdb_flush (gdb_stdout);
890 syms_from_objfile (objfile, addrs, mainline, from_tty);
893 /* We now have at least a partial symbol table. Check to see if the
894 user requested that all symbols be read on initial access via either
895 the gdb startup command line or on a per symbol file basis. Expand
896 all partial symbol tables for this objfile if so. */
898 if ((flags & OBJF_READNOW) || readnow_symbol_files)
900 if (from_tty || info_verbose)
902 printf_filtered ("expanding to full symbols...");
904 gdb_flush (gdb_stdout);
907 for (psymtab = objfile->psymtabs;
909 psymtab = psymtab->next)
911 psymtab_to_symtab (psymtab);
915 if (from_tty || info_verbose)
917 if (post_add_symbol_hook)
918 post_add_symbol_hook ();
921 printf_filtered ("done.\n");
922 gdb_flush (gdb_stdout);
926 new_symfile_objfile (objfile, mainline, from_tty);
928 if (target_new_objfile_hook)
929 target_new_objfile_hook (objfile);
934 /* This is the symbol-file command. Read the file, analyze its
935 symbols, and add a struct symtab to a symtab list. The syntax of
936 the command is rather bizarre--(1) buildargv implements various
937 quoting conventions which are undocumented and have little or
938 nothing in common with the way things are quoted (or not quoted)
939 elsewhere in GDB, (2) options are used, which are not generally
940 used in GDB (perhaps "set mapped on", "set readnow on" would be
941 better), (3) the order of options matters, which is contrary to GNU
942 conventions (because it is confusing and inconvenient). */
943 /* Note: ezannoni 2000-04-17. This function used to have support for
944 rombug (see remote-os9k.c). It consisted of a call to target_link()
945 (target.c) to get the address of the text segment from the target,
946 and pass that to symbol_file_add(). This is no longer supported. */
949 symbol_file_command (args, from_tty)
955 struct cleanup *cleanups;
956 int flags = OBJF_USERLOADED;
962 if ((have_full_symbols () || have_partial_symbols ())
964 && !query ("Discard symbol table from `%s'? ",
965 symfile_objfile->name))
966 error ("Not confirmed.");
967 free_all_objfiles ();
969 /* solib descriptors may have handles to objfiles. Since their
970 storage has just been released, we'd better wipe the solib
973 #if defined(SOLIB_RESTART)
977 symfile_objfile = NULL;
979 printf_unfiltered ("No symbol file now.\n");
981 RESET_HP_UX_GLOBALS ();
986 if ((argv = buildargv (args)) == NULL)
990 cleanups = make_cleanup_freeargv (argv);
991 while (*argv != NULL)
993 if (STREQ (*argv, "-mapped"))
994 flags |= OBJF_MAPPED;
996 if (STREQ (*argv, "-readnow"))
997 flags |= OBJF_READNOW;
1000 error ("unknown option `%s'", *argv);
1004 symbol_file_add (name, from_tty, NULL, 1, flags);
1006 RESET_HP_UX_GLOBALS ();
1008 /* Getting new symbols may change our opinion about
1009 what is frameless. */
1010 reinit_frame_cache ();
1012 set_initial_language ();
1019 error ("no symbol file name was specified");
1021 TUIDO (((TuiOpaqueFuncPtr) tuiDisplayMainFunction));
1022 do_cleanups (cleanups);
1026 /* Set the initial language.
1028 A better solution would be to record the language in the psymtab when reading
1029 partial symbols, and then use it (if known) to set the language. This would
1030 be a win for formats that encode the language in an easily discoverable place,
1031 such as DWARF. For stabs, we can jump through hoops looking for specially
1032 named symbols or try to intuit the language from the specific type of stabs
1033 we find, but we can't do that until later when we read in full symbols.
1037 set_initial_language ()
1039 struct partial_symtab *pst;
1040 enum language lang = language_unknown;
1042 pst = find_main_psymtab ();
1045 if (pst->filename != NULL)
1047 lang = deduce_language_from_filename (pst->filename);
1049 if (lang == language_unknown)
1051 /* Make C the default language */
1054 set_language (lang);
1055 expected_language = current_language; /* Don't warn the user */
1059 /* Open file specified by NAME and hand it off to BFD for preliminary
1060 analysis. Result is a newly initialized bfd *, which includes a newly
1061 malloc'd` copy of NAME (tilde-expanded and made absolute).
1062 In case of trouble, error() is called. */
1065 symfile_bfd_open (name)
1070 char *absolute_name;
1074 name = tilde_expand (name); /* Returns 1st new malloc'd copy */
1076 /* Look down path for it, allocate 2nd new malloc'd copy. */
1077 desc = openp (getenv ("PATH"), 1, name, O_RDONLY | O_BINARY, 0, &absolute_name);
1078 #if defined(__GO32__) || defined(_WIN32)
1081 char *exename = alloca (strlen (name) + 5);
1082 strcat (strcpy (exename, name), ".exe");
1083 desc = openp (getenv ("PATH"), 1, exename, O_RDONLY | O_BINARY,
1089 make_cleanup (free, name);
1090 perror_with_name (name);
1092 free (name); /* Free 1st new malloc'd copy */
1093 name = absolute_name; /* Keep 2nd malloc'd copy in bfd */
1094 /* It'll be freed in free_objfile(). */
1096 sym_bfd = bfd_fdopenr (name, gnutarget, desc);
1100 make_cleanup (free, name);
1101 error ("\"%s\": can't open to read symbols: %s.", name,
1102 bfd_errmsg (bfd_get_error ()));
1104 sym_bfd->cacheable = true;
1106 if (!bfd_check_format (sym_bfd, bfd_object))
1108 /* FIXME: should be checking for errors from bfd_close (for one thing,
1109 on error it does not free all the storage associated with the
1111 bfd_close (sym_bfd); /* This also closes desc */
1112 make_cleanup (free, name);
1113 error ("\"%s\": can't read symbols: %s.", name,
1114 bfd_errmsg (bfd_get_error ()));
1119 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1120 startup by the _initialize routine in each object file format reader,
1121 to register information about each format the the reader is prepared
1128 sf->next = symtab_fns;
1133 /* Initialize to read symbols from the symbol file sym_bfd. It either
1134 returns or calls error(). The result is an initialized struct sym_fns
1135 in the objfile structure, that contains cached information about the
1139 find_sym_fns (objfile)
1140 struct objfile *objfile;
1143 enum bfd_flavour our_flavour = bfd_get_flavour (objfile->obfd);
1144 char *our_target = bfd_get_target (objfile->obfd);
1146 /* Special kludge for apollo. See dstread.c. */
1147 if (STREQN (our_target, "apollo", 6))
1148 our_flavour = (enum bfd_flavour) -2;
1150 for (sf = symtab_fns; sf != NULL; sf = sf->next)
1152 if (our_flavour == sf->sym_flavour)
1158 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
1159 bfd_get_target (objfile->obfd));
1162 /* This function runs the load command of our current target. */
1165 load_command (arg, from_tty)
1170 arg = get_exec_file (1);
1171 target_load (arg, from_tty);
1174 /* This version of "load" should be usable for any target. Currently
1175 it is just used for remote targets, not inftarg.c or core files,
1176 on the theory that only in that case is it useful.
1178 Avoiding xmodem and the like seems like a win (a) because we don't have
1179 to worry about finding it, and (b) On VMS, fork() is very slow and so
1180 we don't want to run a subprocess. On the other hand, I'm not sure how
1181 performance compares. */
1183 static int download_write_size = 512;
1184 static int validate_download = 0;
1187 generic_load (char *args, int from_tty)
1191 time_t start_time, end_time; /* Start and end times of download */
1192 unsigned long data_count = 0; /* Number of bytes transferred to memory */
1193 unsigned long write_count = 0; /* Number of writes needed. */
1194 unsigned long load_offset; /* offset to add to vma for each section */
1196 struct cleanup *old_cleanups;
1198 CORE_ADDR total_size = 0;
1199 CORE_ADDR total_sent = 0;
1201 /* Parse the input argument - the user can specify a load offset as
1202 a second argument. */
1203 filename = xmalloc (strlen (args) + 1);
1204 old_cleanups = make_cleanup (free, filename);
1205 strcpy (filename, args);
1206 offptr = strchr (filename, ' ');
1210 load_offset = strtoul (offptr, &endptr, 0);
1211 if (offptr == endptr)
1212 error ("Invalid download offset:%s\n", offptr);
1218 /* Open the file for loading. */
1219 loadfile_bfd = bfd_openr (filename, gnutarget);
1220 if (loadfile_bfd == NULL)
1222 perror_with_name (filename);
1226 /* FIXME: should be checking for errors from bfd_close (for one thing,
1227 on error it does not free all the storage associated with the
1229 make_cleanup_bfd_close (loadfile_bfd);
1231 if (!bfd_check_format (loadfile_bfd, bfd_object))
1233 error ("\"%s\" is not an object file: %s", filename,
1234 bfd_errmsg (bfd_get_error ()));
1237 for (s = loadfile_bfd->sections; s; s = s->next)
1238 if (s->flags & SEC_LOAD)
1239 total_size += bfd_get_section_size_before_reloc (s);
1241 start_time = time (NULL);
1243 for (s = loadfile_bfd->sections; s; s = s->next)
1245 if (s->flags & SEC_LOAD)
1247 CORE_ADDR size = bfd_get_section_size_before_reloc (s);
1251 struct cleanup *old_chain;
1252 CORE_ADDR lma = s->lma + load_offset;
1253 CORE_ADDR block_size;
1255 const char *sect_name = bfd_get_section_name (loadfile_bfd, s);
1258 if (download_write_size > 0 && size > download_write_size)
1259 block_size = download_write_size;
1263 buffer = xmalloc (size);
1264 old_chain = make_cleanup (free, buffer);
1266 /* Is this really necessary? I guess it gives the user something
1267 to look at during a long download. */
1269 ui_out_message (uiout, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1270 sect_name, paddr_nz (size), paddr_nz (lma));
1272 fprintf_unfiltered (gdb_stdout,
1273 "Loading section %s, size 0x%s lma 0x%s\n",
1274 sect_name, paddr_nz (size), paddr_nz (lma));
1277 bfd_get_section_contents (loadfile_bfd, s, buffer, 0, size);
1283 CORE_ADDR this_transfer = size - sent;
1284 if (this_transfer >= block_size)
1285 this_transfer = block_size;
1286 len = target_write_memory_partial (lma, buffer,
1287 this_transfer, &err);
1290 if (validate_download)
1292 /* Broken memories and broken monitors manifest
1293 themselves here when bring new computers to
1294 life. This doubles already slow downloads. */
1295 /* NOTE: cagney/1999-10-18: A more efficient
1296 implementation might add a verify_memory()
1297 method to the target vector and then use
1298 that. remote.c could implement that method
1299 using the ``qCRC'' packet. */
1300 char *check = xmalloc (len);
1301 struct cleanup *verify_cleanups = make_cleanup (free, check);
1302 if (target_read_memory (lma, check, len) != 0)
1303 error ("Download verify read failed at 0x%s",
1305 if (memcmp (buffer, check, len) != 0)
1306 error ("Download verify compare failed at 0x%s",
1308 do_cleanups (verify_cleanups);
1317 || (ui_load_progress_hook != NULL
1318 && ui_load_progress_hook (sect_name, sent)))
1319 error ("Canceled the download");
1321 if (show_load_progress != NULL)
1322 show_load_progress (sect_name, sent, size, total_sent, total_size);
1324 while (sent < size);
1327 error ("Memory access error while loading section %s.", sect_name);
1329 do_cleanups (old_chain);
1334 end_time = time (NULL);
1337 entry = bfd_get_start_address (loadfile_bfd);
1339 ui_out_text (uiout, "Start address ");
1340 ui_out_field_fmt (uiout, "address", "0x%s" , paddr_nz (entry));
1341 ui_out_text (uiout, ", load size ");
1342 ui_out_field_fmt (uiout, "load-size", "%ld" , data_count);
1343 ui_out_text (uiout, "\n");
1346 fprintf_unfiltered (gdb_stdout,
1347 "Start address 0x%s , load size %ld\n",
1348 paddr_nz (entry), data_count);
1350 /* We were doing this in remote-mips.c, I suspect it is right
1351 for other targets too. */
1355 /* FIXME: are we supposed to call symbol_file_add or not? According to
1356 a comment from remote-mips.c (where a call to symbol_file_add was
1357 commented out), making the call confuses GDB if more than one file is
1358 loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c
1361 print_transfer_performance (gdb_stdout, data_count, write_count,
1362 end_time - start_time);
1364 do_cleanups (old_cleanups);
1367 /* Report how fast the transfer went. */
1369 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1370 replaced by print_transfer_performance (with a very different
1371 function signature). */
1374 report_transfer_performance (data_count, start_time, end_time)
1375 unsigned long data_count;
1376 time_t start_time, end_time;
1378 print_transfer_performance (gdb_stdout, data_count, end_time - start_time, 0);
1382 print_transfer_performance (struct ui_file *stream,
1383 unsigned long data_count,
1384 unsigned long write_count,
1385 unsigned long time_count)
1388 ui_out_text (uiout, "Transfer rate: ");
1391 ui_out_field_fmt (uiout, "transfer-rate", "%ld",
1392 (data_count * 8) / time_count);
1393 ui_out_text (uiout, " bits/sec");
1397 ui_out_field_fmt (uiout, "transferred-bits", "%ld", (data_count * 8));
1398 ui_out_text (uiout, " bits in <1 sec");
1400 if (write_count > 0)
1402 ui_out_text (uiout, ", ");
1403 ui_out_field_fmt (uiout, "write-rate", "%ld", data_count / write_count);
1404 ui_out_text (uiout, " bytes/write");
1406 ui_out_text (uiout, ".\n");
1408 fprintf_unfiltered (stream, "Transfer rate: ");
1410 fprintf_unfiltered (stream, "%ld bits/sec", (data_count * 8) / time_count);
1412 fprintf_unfiltered (stream, "%ld bits in <1 sec", (data_count * 8));
1413 if (write_count > 0)
1414 fprintf_unfiltered (stream, ", %ld bytes/write", data_count / write_count);
1415 fprintf_unfiltered (stream, ".\n");
1419 /* This function allows the addition of incrementally linked object files.
1420 It does not modify any state in the target, only in the debugger. */
1421 /* Note: ezannoni 2000-04-13 This function/command used to have a
1422 special case syntax for the rombug target (Rombug is the boot
1423 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
1424 rombug case, the user doesn't need to supply a text address,
1425 instead a call to target_link() (in target.c) would supply the
1426 value to use. We are now discontinuing this type of ad hoc syntax. */
1430 add_symbol_file_command (args, from_tty)
1434 char *filename = NULL;
1435 int flags = OBJF_USERLOADED;
1437 int expecting_option = 0;
1438 int section_index = 0;
1442 int expecting_sec_name = 0;
1443 int expecting_sec_addr = 0;
1449 } sect_opts[SECT_OFF_MAX];
1451 struct section_addr_info section_addrs;
1452 struct cleanup *my_cleanups;
1457 error ("add-symbol-file takes a file name and an address");
1459 /* Make a copy of the string that we can safely write into. */
1460 args = xstrdup (args);
1462 /* Ensure section_addrs is initialized */
1463 memset (§ion_addrs, 0, sizeof (section_addrs));
1465 while (*args != '\000')
1467 /* Any leading spaces? */
1468 while (isspace (*args))
1471 /* Point arg to the beginning of the argument. */
1474 /* Move args pointer over the argument. */
1475 while ((*args != '\000') && !isspace (*args))
1478 /* If there are more arguments, terminate arg and
1480 if (*args != '\000')
1483 /* Now process the argument. */
1486 /* The first argument is the file name. */
1487 filename = tilde_expand (arg);
1488 my_cleanups = make_cleanup (free, filename);
1493 /* The second argument is always the text address at which
1494 to load the program. */
1495 sect_opts[section_index].name = ".text";
1496 sect_opts[section_index].value = arg;
1501 /* It's an option (starting with '-') or it's an argument
1506 if (strcmp (arg, "-mapped") == 0)
1507 flags |= OBJF_MAPPED;
1509 if (strcmp (arg, "-readnow") == 0)
1510 flags |= OBJF_READNOW;
1512 if (strcmp (arg, "-s") == 0)
1514 if (section_index >= SECT_OFF_MAX)
1515 error ("Too many sections specified.");
1516 expecting_sec_name = 1;
1517 expecting_sec_addr = 1;
1522 if (expecting_sec_name)
1524 sect_opts[section_index].name = arg;
1525 expecting_sec_name = 0;
1528 if (expecting_sec_addr)
1530 sect_opts[section_index].value = arg;
1531 expecting_sec_addr = 0;
1535 error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*");
1541 /* Print the prompt for the query below. And save the arguments into
1542 a sect_addr_info structure to be passed around to other
1543 functions. We have to split this up into separate print
1544 statements because local_hex_string returns a local static
1547 printf_filtered ("add symbol table from file \"%s\" at\n", filename);
1548 for (i = 0; i < section_index; i++)
1551 char *val = sect_opts[i].value;
1552 char *sec = sect_opts[i].name;
1554 val = sect_opts[i].value;
1555 if (val[0] == '0' && val[1] == 'x')
1556 addr = strtoul (val+2, NULL, 16);
1558 addr = strtoul (val, NULL, 10);
1560 /* Here we store the section offsets in the order they were
1561 entered on the command line. */
1562 section_addrs.other[sec_num].name = sec;
1563 section_addrs.other[sec_num].addr = addr;
1564 printf_filtered ("\t%s_addr = %s\n",
1566 local_hex_string ((unsigned long)addr));
1569 /* The object's sections are initialized when a
1570 call is made to build_objfile_section_table (objfile).
1571 This happens in reread_symbols.
1572 At this point, we don't know what file type this is,
1573 so we can't determine what section names are valid. */
1576 if (from_tty && (!query ("%s", "")))
1577 error ("Not confirmed.");
1579 symbol_file_add (filename, from_tty, §ion_addrs, 0, flags);
1581 /* Getting new symbols may change our opinion about what is
1583 reinit_frame_cache ();
1584 do_cleanups (my_cleanups);
1588 add_shared_symbol_files_command (args, from_tty)
1592 #ifdef ADD_SHARED_SYMBOL_FILES
1593 ADD_SHARED_SYMBOL_FILES (args, from_tty);
1595 error ("This command is not available in this configuration of GDB.");
1599 /* Re-read symbols if a symbol-file has changed. */
1603 struct objfile *objfile;
1606 struct stat new_statbuf;
1609 /* With the addition of shared libraries, this should be modified,
1610 the load time should be saved in the partial symbol tables, since
1611 different tables may come from different source files. FIXME.
1612 This routine should then walk down each partial symbol table
1613 and see if the symbol table that it originates from has been changed */
1615 for (objfile = object_files; objfile; objfile = objfile->next)
1619 #ifdef IBM6000_TARGET
1620 /* If this object is from a shared library, then you should
1621 stat on the library name, not member name. */
1623 if (objfile->obfd->my_archive)
1624 res = stat (objfile->obfd->my_archive->filename, &new_statbuf);
1627 res = stat (objfile->name, &new_statbuf);
1630 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1631 printf_filtered ("`%s' has disappeared; keeping its symbols.\n",
1635 new_modtime = new_statbuf.st_mtime;
1636 if (new_modtime != objfile->mtime)
1638 struct cleanup *old_cleanups;
1639 struct section_offsets *offsets;
1641 char *obfd_filename;
1643 printf_filtered ("`%s' has changed; re-reading symbols.\n",
1646 /* There are various functions like symbol_file_add,
1647 symfile_bfd_open, syms_from_objfile, etc., which might
1648 appear to do what we want. But they have various other
1649 effects which we *don't* want. So we just do stuff
1650 ourselves. We don't worry about mapped files (for one thing,
1651 any mapped file will be out of date). */
1653 /* If we get an error, blow away this objfile (not sure if
1654 that is the correct response for things like shared
1656 old_cleanups = make_cleanup_free_objfile (objfile);
1657 /* We need to do this whenever any symbols go away. */
1658 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
1660 /* Clean up any state BFD has sitting around. We don't need
1661 to close the descriptor but BFD lacks a way of closing the
1662 BFD without closing the descriptor. */
1663 obfd_filename = bfd_get_filename (objfile->obfd);
1664 if (!bfd_close (objfile->obfd))
1665 error ("Can't close BFD for %s: %s", objfile->name,
1666 bfd_errmsg (bfd_get_error ()));
1667 objfile->obfd = bfd_openr (obfd_filename, gnutarget);
1668 if (objfile->obfd == NULL)
1669 error ("Can't open %s to read symbols.", objfile->name);
1670 /* bfd_openr sets cacheable to true, which is what we want. */
1671 if (!bfd_check_format (objfile->obfd, bfd_object))
1672 error ("Can't read symbols from %s: %s.", objfile->name,
1673 bfd_errmsg (bfd_get_error ()));
1675 /* Save the offsets, we will nuke them with the rest of the
1677 num_offsets = objfile->num_sections;
1678 offsets = (struct section_offsets *) alloca (SIZEOF_SECTION_OFFSETS);
1679 memcpy (offsets, objfile->section_offsets, SIZEOF_SECTION_OFFSETS);
1681 /* Nuke all the state that we will re-read. Much of the following
1682 code which sets things to NULL really is necessary to tell
1683 other parts of GDB that there is nothing currently there. */
1685 /* FIXME: Do we have to free a whole linked list, or is this
1687 if (objfile->global_psymbols.list)
1688 mfree (objfile->md, objfile->global_psymbols.list);
1689 memset (&objfile->global_psymbols, 0,
1690 sizeof (objfile->global_psymbols));
1691 if (objfile->static_psymbols.list)
1692 mfree (objfile->md, objfile->static_psymbols.list);
1693 memset (&objfile->static_psymbols, 0,
1694 sizeof (objfile->static_psymbols));
1696 /* Free the obstacks for non-reusable objfiles */
1697 free_bcache (&objfile->psymbol_cache);
1698 obstack_free (&objfile->psymbol_obstack, 0);
1699 obstack_free (&objfile->symbol_obstack, 0);
1700 obstack_free (&objfile->type_obstack, 0);
1701 objfile->sections = NULL;
1702 objfile->symtabs = NULL;
1703 objfile->psymtabs = NULL;
1704 objfile->free_psymtabs = NULL;
1705 objfile->msymbols = NULL;
1706 objfile->minimal_symbol_count = 0;
1707 memset (&objfile->msymbol_hash, 0,
1708 sizeof (objfile->msymbol_hash));
1709 memset (&objfile->msymbol_demangled_hash, 0,
1710 sizeof (objfile->msymbol_demangled_hash));
1711 objfile->fundamental_types = NULL;
1712 if (objfile->sf != NULL)
1714 (*objfile->sf->sym_finish) (objfile);
1717 /* We never make this a mapped file. */
1719 /* obstack_specify_allocation also initializes the obstack so
1721 obstack_specify_allocation (&objfile->psymbol_cache.cache, 0, 0,
1723 obstack_specify_allocation (&objfile->psymbol_obstack, 0, 0,
1725 obstack_specify_allocation (&objfile->symbol_obstack, 0, 0,
1727 obstack_specify_allocation (&objfile->type_obstack, 0, 0,
1729 if (build_objfile_section_table (objfile))
1731 error ("Can't find the file sections in `%s': %s",
1732 objfile->name, bfd_errmsg (bfd_get_error ()));
1735 /* We use the same section offsets as from last time. I'm not
1736 sure whether that is always correct for shared libraries. */
1737 objfile->section_offsets = (struct section_offsets *)
1738 obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS);
1739 memcpy (objfile->section_offsets, offsets, SIZEOF_SECTION_OFFSETS);
1740 objfile->num_sections = num_offsets;
1742 /* What the hell is sym_new_init for, anyway? The concept of
1743 distinguishing between the main file and additional files
1744 in this way seems rather dubious. */
1745 if (objfile == symfile_objfile)
1747 (*objfile->sf->sym_new_init) (objfile);
1749 RESET_HP_UX_GLOBALS ();
1753 (*objfile->sf->sym_init) (objfile);
1754 clear_complaints (1, 1);
1755 /* The "mainline" parameter is a hideous hack; I think leaving it
1756 zero is OK since dbxread.c also does what it needs to do if
1757 objfile->global_psymbols.size is 0. */
1758 (*objfile->sf->sym_read) (objfile, 0);
1759 if (!have_partial_symbols () && !have_full_symbols ())
1762 printf_filtered ("(no debugging symbols found)\n");
1765 objfile->flags |= OBJF_SYMS;
1767 /* We're done reading the symbol file; finish off complaints. */
1768 clear_complaints (0, 1);
1770 /* Getting new symbols may change our opinion about what is
1773 reinit_frame_cache ();
1775 /* Discard cleanups as symbol reading was successful. */
1776 discard_cleanups (old_cleanups);
1778 /* If the mtime has changed between the time we set new_modtime
1779 and now, we *want* this to be out of date, so don't call stat
1781 objfile->mtime = new_modtime;
1784 /* Call this after reading in a new symbol table to give target
1785 dependant code a crack at the new symbols. For instance, this
1786 could be used to update the values of target-specific symbols GDB
1787 needs to keep track of (such as _sigtramp, or whatever). */
1789 TARGET_SYMFILE_POSTREAD (objfile);
1795 clear_symtab_users ();
1807 static filename_language *filename_language_table;
1808 static int fl_table_size, fl_table_next;
1811 add_filename_language (ext, lang)
1815 if (fl_table_next >= fl_table_size)
1817 fl_table_size += 10;
1818 filename_language_table = realloc (filename_language_table,
1822 filename_language_table[fl_table_next].ext = strsave (ext);
1823 filename_language_table[fl_table_next].lang = lang;
1827 static char *ext_args;
1830 set_ext_lang_command (args, from_tty)
1835 char *cp = ext_args;
1838 /* First arg is filename extension, starting with '.' */
1840 error ("'%s': Filename extension must begin with '.'", ext_args);
1842 /* Find end of first arg. */
1843 while (*cp && !isspace (*cp))
1847 error ("'%s': two arguments required -- filename extension and language",
1850 /* Null-terminate first arg */
1853 /* Find beginning of second arg, which should be a source language. */
1854 while (*cp && isspace (*cp))
1858 error ("'%s': two arguments required -- filename extension and language",
1861 /* Lookup the language from among those we know. */
1862 lang = language_enum (cp);
1864 /* Now lookup the filename extension: do we already know it? */
1865 for (i = 0; i < fl_table_next; i++)
1866 if (0 == strcmp (ext_args, filename_language_table[i].ext))
1869 if (i >= fl_table_next)
1871 /* new file extension */
1872 add_filename_language (ext_args, lang);
1876 /* redefining a previously known filename extension */
1879 /* query ("Really make files of type %s '%s'?", */
1880 /* ext_args, language_str (lang)); */
1882 free (filename_language_table[i].ext);
1883 filename_language_table[i].ext = strsave (ext_args);
1884 filename_language_table[i].lang = lang;
1889 info_ext_lang_command (args, from_tty)
1895 printf_filtered ("Filename extensions and the languages they represent:");
1896 printf_filtered ("\n\n");
1897 for (i = 0; i < fl_table_next; i++)
1898 printf_filtered ("\t%s\t- %s\n",
1899 filename_language_table[i].ext,
1900 language_str (filename_language_table[i].lang));
1904 init_filename_language_table ()
1906 if (fl_table_size == 0) /* protect against repetition */
1910 filename_language_table =
1911 xmalloc (fl_table_size * sizeof (*filename_language_table));
1912 add_filename_language (".c", language_c);
1913 add_filename_language (".C", language_cplus);
1914 add_filename_language (".cc", language_cplus);
1915 add_filename_language (".cp", language_cplus);
1916 add_filename_language (".cpp", language_cplus);
1917 add_filename_language (".cxx", language_cplus);
1918 add_filename_language (".c++", language_cplus);
1919 add_filename_language (".java", language_java);
1920 add_filename_language (".class", language_java);
1921 add_filename_language (".ch", language_chill);
1922 add_filename_language (".c186", language_chill);
1923 add_filename_language (".c286", language_chill);
1924 add_filename_language (".f", language_fortran);
1925 add_filename_language (".F", language_fortran);
1926 add_filename_language (".s", language_asm);
1927 add_filename_language (".S", language_asm);
1928 add_filename_language (".pas", language_pascal);
1929 add_filename_language (".p", language_pascal);
1930 add_filename_language (".pp", language_pascal);
1935 deduce_language_from_filename (filename)
1941 if (filename != NULL)
1942 if ((cp = strrchr (filename, '.')) != NULL)
1943 for (i = 0; i < fl_table_next; i++)
1944 if (strcmp (cp, filename_language_table[i].ext) == 0)
1945 return filename_language_table[i].lang;
1947 return language_unknown;
1952 Allocate and partly initialize a new symbol table. Return a pointer
1953 to it. error() if no space.
1955 Caller must set these fields:
1961 possibly free_named_symtabs (symtab->filename);
1965 allocate_symtab (filename, objfile)
1967 struct objfile *objfile;
1969 register struct symtab *symtab;
1971 symtab = (struct symtab *)
1972 obstack_alloc (&objfile->symbol_obstack, sizeof (struct symtab));
1973 memset (symtab, 0, sizeof (*symtab));
1974 symtab->filename = obsavestring (filename, strlen (filename),
1975 &objfile->symbol_obstack);
1976 symtab->fullname = NULL;
1977 symtab->language = deduce_language_from_filename (filename);
1978 symtab->debugformat = obsavestring ("unknown", 7,
1979 &objfile->symbol_obstack);
1981 /* Hook it to the objfile it comes from */
1983 symtab->objfile = objfile;
1984 symtab->next = objfile->symtabs;
1985 objfile->symtabs = symtab;
1987 /* FIXME: This should go away. It is only defined for the Z8000,
1988 and the Z8000 definition of this macro doesn't have anything to
1989 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
1990 here for convenience. */
1991 #ifdef INIT_EXTRA_SYMTAB_INFO
1992 INIT_EXTRA_SYMTAB_INFO (symtab);
1998 struct partial_symtab *
1999 allocate_psymtab (filename, objfile)
2001 struct objfile *objfile;
2003 struct partial_symtab *psymtab;
2005 if (objfile->free_psymtabs)
2007 psymtab = objfile->free_psymtabs;
2008 objfile->free_psymtabs = psymtab->next;
2011 psymtab = (struct partial_symtab *)
2012 obstack_alloc (&objfile->psymbol_obstack,
2013 sizeof (struct partial_symtab));
2015 memset (psymtab, 0, sizeof (struct partial_symtab));
2016 psymtab->filename = obsavestring (filename, strlen (filename),
2017 &objfile->psymbol_obstack);
2018 psymtab->symtab = NULL;
2020 /* Prepend it to the psymtab list for the objfile it belongs to.
2021 Psymtabs are searched in most recent inserted -> least recent
2024 psymtab->objfile = objfile;
2025 psymtab->next = objfile->psymtabs;
2026 objfile->psymtabs = psymtab;
2029 struct partial_symtab **prev_pst;
2030 psymtab->objfile = objfile;
2031 psymtab->next = NULL;
2032 prev_pst = &(objfile->psymtabs);
2033 while ((*prev_pst) != NULL)
2034 prev_pst = &((*prev_pst)->next);
2035 (*prev_pst) = psymtab;
2043 discard_psymtab (pst)
2044 struct partial_symtab *pst;
2046 struct partial_symtab **prev_pst;
2049 Empty psymtabs happen as a result of header files which don't
2050 have any symbols in them. There can be a lot of them. But this
2051 check is wrong, in that a psymtab with N_SLINE entries but
2052 nothing else is not empty, but we don't realize that. Fixing
2053 that without slowing things down might be tricky. */
2055 /* First, snip it out of the psymtab chain */
2057 prev_pst = &(pst->objfile->psymtabs);
2058 while ((*prev_pst) != pst)
2059 prev_pst = &((*prev_pst)->next);
2060 (*prev_pst) = pst->next;
2062 /* Next, put it on a free list for recycling */
2064 pst->next = pst->objfile->free_psymtabs;
2065 pst->objfile->free_psymtabs = pst;
2069 /* Reset all data structures in gdb which may contain references to symbol
2073 clear_symtab_users ()
2075 /* Someday, we should do better than this, by only blowing away
2076 the things that really need to be blown. */
2077 clear_value_history ();
2079 clear_internalvars ();
2080 breakpoint_re_set ();
2081 set_default_breakpoint (0, 0, 0, 0);
2082 current_source_symtab = 0;
2083 current_source_line = 0;
2084 clear_pc_function_cache ();
2085 if (target_new_objfile_hook)
2086 target_new_objfile_hook (NULL);
2090 clear_symtab_users_cleanup (void *ignore)
2092 clear_symtab_users ();
2095 /* clear_symtab_users_once:
2097 This function is run after symbol reading, or from a cleanup.
2098 If an old symbol table was obsoleted, the old symbol table
2099 has been blown away, but the other GDB data structures that may
2100 reference it have not yet been cleared or re-directed. (The old
2101 symtab was zapped, and the cleanup queued, in free_named_symtab()
2104 This function can be queued N times as a cleanup, or called
2105 directly; it will do all the work the first time, and then will be a
2106 no-op until the next time it is queued. This works by bumping a
2107 counter at queueing time. Much later when the cleanup is run, or at
2108 the end of symbol processing (in case the cleanup is discarded), if
2109 the queued count is greater than the "done-count", we do the work
2110 and set the done-count to the queued count. If the queued count is
2111 less than or equal to the done-count, we just ignore the call. This
2112 is needed because reading a single .o file will often replace many
2113 symtabs (one per .h file, for example), and we don't want to reset
2114 the breakpoints N times in the user's face.
2116 The reason we both queue a cleanup, and call it directly after symbol
2117 reading, is because the cleanup protects us in case of errors, but is
2118 discarded if symbol reading is successful. */
2121 /* FIXME: As free_named_symtabs is currently a big noop this function
2122 is no longer needed. */
2123 static void clear_symtab_users_once (void);
2125 static int clear_symtab_users_queued;
2126 static int clear_symtab_users_done;
2129 clear_symtab_users_once ()
2131 /* Enforce once-per-`do_cleanups'-semantics */
2132 if (clear_symtab_users_queued <= clear_symtab_users_done)
2134 clear_symtab_users_done = clear_symtab_users_queued;
2136 clear_symtab_users ();
2140 /* Delete the specified psymtab, and any others that reference it. */
2143 cashier_psymtab (pst)
2144 struct partial_symtab *pst;
2146 struct partial_symtab *ps, *pprev = NULL;
2149 /* Find its previous psymtab in the chain */
2150 for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
2159 /* Unhook it from the chain. */
2160 if (ps == pst->objfile->psymtabs)
2161 pst->objfile->psymtabs = ps->next;
2163 pprev->next = ps->next;
2165 /* FIXME, we can't conveniently deallocate the entries in the
2166 partial_symbol lists (global_psymbols/static_psymbols) that
2167 this psymtab points to. These just take up space until all
2168 the psymtabs are reclaimed. Ditto the dependencies list and
2169 filename, which are all in the psymbol_obstack. */
2171 /* We need to cashier any psymtab that has this one as a dependency... */
2173 for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
2175 for (i = 0; i < ps->number_of_dependencies; i++)
2177 if (ps->dependencies[i] == pst)
2179 cashier_psymtab (ps);
2180 goto again; /* Must restart, chain has been munged. */
2187 /* If a symtab or psymtab for filename NAME is found, free it along
2188 with any dependent breakpoints, displays, etc.
2189 Used when loading new versions of object modules with the "add-file"
2190 command. This is only called on the top-level symtab or psymtab's name;
2191 it is not called for subsidiary files such as .h files.
2193 Return value is 1 if we blew away the environment, 0 if not.
2194 FIXME. The return valu appears to never be used.
2196 FIXME. I think this is not the best way to do this. We should
2197 work on being gentler to the environment while still cleaning up
2198 all stray pointers into the freed symtab. */
2201 free_named_symtabs (name)
2205 /* FIXME: With the new method of each objfile having it's own
2206 psymtab list, this function needs serious rethinking. In particular,
2207 why was it ever necessary to toss psymtabs with specific compilation
2208 unit filenames, as opposed to all psymtabs from a particular symbol
2210 Well, the answer is that some systems permit reloading of particular
2211 compilation units. We want to blow away any old info about these
2212 compilation units, regardless of which objfiles they arrived in. --gnu. */
2214 register struct symtab *s;
2215 register struct symtab *prev;
2216 register struct partial_symtab *ps;
2217 struct blockvector *bv;
2220 /* We only wack things if the symbol-reload switch is set. */
2221 if (!symbol_reloading)
2224 /* Some symbol formats have trouble providing file names... */
2225 if (name == 0 || *name == '\0')
2228 /* Look for a psymtab with the specified name. */
2231 for (ps = partial_symtab_list; ps; ps = ps->next)
2233 if (STREQ (name, ps->filename))
2235 cashier_psymtab (ps); /* Blow it away...and its little dog, too. */
2236 goto again2; /* Must restart, chain has been munged */
2240 /* Look for a symtab with the specified name. */
2242 for (s = symtab_list; s; s = s->next)
2244 if (STREQ (name, s->filename))
2251 if (s == symtab_list)
2252 symtab_list = s->next;
2254 prev->next = s->next;
2256 /* For now, queue a delete for all breakpoints, displays, etc., whether
2257 or not they depend on the symtab being freed. This should be
2258 changed so that only those data structures affected are deleted. */
2260 /* But don't delete anything if the symtab is empty.
2261 This test is necessary due to a bug in "dbxread.c" that
2262 causes empty symtabs to be created for N_SO symbols that
2263 contain the pathname of the object file. (This problem
2264 has been fixed in GDB 3.9x). */
2266 bv = BLOCKVECTOR (s);
2267 if (BLOCKVECTOR_NBLOCKS (bv) > 2
2268 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK))
2269 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)))
2271 complain (&oldsyms_complaint, name);
2273 clear_symtab_users_queued++;
2274 make_cleanup (clear_symtab_users_once, 0);
2279 complain (&empty_symtab_complaint, name);
2286 /* It is still possible that some breakpoints will be affected
2287 even though no symtab was found, since the file might have
2288 been compiled without debugging, and hence not be associated
2289 with a symtab. In order to handle this correctly, we would need
2290 to keep a list of text address ranges for undebuggable files.
2291 For now, we do nothing, since this is a fairly obscure case. */
2295 /* FIXME, what about the minimal symbol table? */
2302 /* Allocate and partially fill a partial symtab. It will be
2303 completely filled at the end of the symbol list.
2305 FILENAME is the name of the symbol-file we are reading from. */
2307 struct partial_symtab *
2308 start_psymtab_common (objfile, section_offsets,
2309 filename, textlow, global_syms, static_syms)
2310 struct objfile *objfile;
2311 struct section_offsets *section_offsets;
2314 struct partial_symbol **global_syms;
2315 struct partial_symbol **static_syms;
2317 struct partial_symtab *psymtab;
2319 psymtab = allocate_psymtab (filename, objfile);
2320 psymtab->section_offsets = section_offsets;
2321 psymtab->textlow = textlow;
2322 psymtab->texthigh = psymtab->textlow; /* default */
2323 psymtab->globals_offset = global_syms - objfile->global_psymbols.list;
2324 psymtab->statics_offset = static_syms - objfile->static_psymbols.list;
2328 /* Add a symbol with a long value to a psymtab.
2329 Since one arg is a struct, we pass in a ptr and deref it (sigh). */
2332 add_psymbol_to_list (name, namelength, namespace, class, list, val, coreaddr,
2336 namespace_enum namespace;
2337 enum address_class class;
2338 struct psymbol_allocation_list *list;
2339 long val; /* Value as a long */
2340 CORE_ADDR coreaddr; /* Value as a CORE_ADDR */
2341 enum language language;
2342 struct objfile *objfile;
2344 register struct partial_symbol *psym;
2345 char *buf = alloca (namelength + 1);
2346 /* psymbol is static so that there will be no uninitialized gaps in the
2347 structure which might contain random data, causing cache misses in
2349 static struct partial_symbol psymbol;
2351 /* Create local copy of the partial symbol */
2352 memcpy (buf, name, namelength);
2353 buf[namelength] = '\0';
2354 SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, &objfile->psymbol_cache);
2355 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2358 SYMBOL_VALUE (&psymbol) = val;
2362 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
2364 SYMBOL_SECTION (&psymbol) = 0;
2365 SYMBOL_LANGUAGE (&psymbol) = language;
2366 PSYMBOL_NAMESPACE (&psymbol) = namespace;
2367 PSYMBOL_CLASS (&psymbol) = class;
2368 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language);
2370 /* Stash the partial symbol away in the cache */
2371 psym = bcache (&psymbol, sizeof (struct partial_symbol), &objfile->psymbol_cache);
2373 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2374 if (list->next >= list->list + list->size)
2376 extend_psymbol_list (list, objfile);
2378 *list->next++ = psym;
2379 OBJSTAT (objfile, n_psyms++);
2382 /* Add a symbol with a long value to a psymtab. This differs from
2383 * add_psymbol_to_list above in taking both a mangled and a demangled
2387 add_psymbol_with_dem_name_to_list (name, namelength, dem_name, dem_namelength,
2388 namespace, class, list, val, coreaddr, language, objfile)
2393 namespace_enum namespace;
2394 enum address_class class;
2395 struct psymbol_allocation_list *list;
2396 long val; /* Value as a long */
2397 CORE_ADDR coreaddr; /* Value as a CORE_ADDR */
2398 enum language language;
2399 struct objfile *objfile;
2401 register struct partial_symbol *psym;
2402 char *buf = alloca (namelength + 1);
2403 /* psymbol is static so that there will be no uninitialized gaps in the
2404 structure which might contain random data, causing cache misses in
2406 static struct partial_symbol psymbol;
2408 /* 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);
2414 buf = alloca (dem_namelength + 1);
2415 memcpy (buf, dem_name, dem_namelength);
2416 buf[dem_namelength] = '\0';
2421 case language_cplus:
2422 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol) =
2423 bcache (buf, dem_namelength + 1, &objfile->psymbol_cache);
2425 case language_chill:
2426 SYMBOL_CHILL_DEMANGLED_NAME (&psymbol) =
2427 bcache (buf, dem_namelength + 1, &objfile->psymbol_cache);
2429 /* FIXME What should be done for the default case? Ignoring for now. */
2432 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2435 SYMBOL_VALUE (&psymbol) = val;
2439 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
2441 SYMBOL_SECTION (&psymbol) = 0;
2442 SYMBOL_LANGUAGE (&psymbol) = language;
2443 PSYMBOL_NAMESPACE (&psymbol) = namespace;
2444 PSYMBOL_CLASS (&psymbol) = class;
2445 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language);
2447 /* Stash the partial symbol away in the cache */
2448 psym = bcache (&psymbol, sizeof (struct partial_symbol), &objfile->psymbol_cache);
2450 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2451 if (list->next >= list->list + list->size)
2453 extend_psymbol_list (list, objfile);
2455 *list->next++ = psym;
2456 OBJSTAT (objfile, n_psyms++);
2459 /* Initialize storage for partial symbols. */
2462 init_psymbol_list (objfile, total_symbols)
2463 struct objfile *objfile;
2466 /* Free any previously allocated psymbol lists. */
2468 if (objfile->global_psymbols.list)
2470 mfree (objfile->md, (PTR) objfile->global_psymbols.list);
2472 if (objfile->static_psymbols.list)
2474 mfree (objfile->md, (PTR) objfile->static_psymbols.list);
2477 /* Current best guess is that approximately a twentieth
2478 of the total symbols (in a debugging file) are global or static
2481 objfile->global_psymbols.size = total_symbols / 10;
2482 objfile->static_psymbols.size = total_symbols / 10;
2484 if (objfile->global_psymbols.size > 0)
2486 objfile->global_psymbols.next =
2487 objfile->global_psymbols.list = (struct partial_symbol **)
2488 xmmalloc (objfile->md, (objfile->global_psymbols.size
2489 * sizeof (struct partial_symbol *)));
2491 if (objfile->static_psymbols.size > 0)
2493 objfile->static_psymbols.next =
2494 objfile->static_psymbols.list = (struct partial_symbol **)
2495 xmmalloc (objfile->md, (objfile->static_psymbols.size
2496 * sizeof (struct partial_symbol *)));
2501 The following code implements an abstraction for debugging overlay sections.
2503 The target model is as follows:
2504 1) The gnu linker will permit multiple sections to be mapped into the
2505 same VMA, each with its own unique LMA (or load address).
2506 2) It is assumed that some runtime mechanism exists for mapping the
2507 sections, one by one, from the load address into the VMA address.
2508 3) This code provides a mechanism for gdb to keep track of which
2509 sections should be considered to be mapped from the VMA to the LMA.
2510 This information is used for symbol lookup, and memory read/write.
2511 For instance, if a section has been mapped then its contents
2512 should be read from the VMA, otherwise from the LMA.
2514 Two levels of debugger support for overlays are available. One is
2515 "manual", in which the debugger relies on the user to tell it which
2516 overlays are currently mapped. This level of support is
2517 implemented entirely in the core debugger, and the information about
2518 whether a section is mapped is kept in the objfile->obj_section table.
2520 The second level of support is "automatic", and is only available if
2521 the target-specific code provides functionality to read the target's
2522 overlay mapping table, and translate its contents for the debugger
2523 (by updating the mapped state information in the obj_section tables).
2525 The interface is as follows:
2527 overlay map <name> -- tell gdb to consider this section mapped
2528 overlay unmap <name> -- tell gdb to consider this section unmapped
2529 overlay list -- list the sections that GDB thinks are mapped
2530 overlay read-target -- get the target's state of what's mapped
2531 overlay off/manual/auto -- set overlay debugging state
2532 Functional interface:
2533 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2534 section, return that section.
2535 find_pc_overlay(pc): find any overlay section that contains
2536 the pc, either in its VMA or its LMA
2537 overlay_is_mapped(sect): true if overlay is marked as mapped
2538 section_is_overlay(sect): true if section's VMA != LMA
2539 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2540 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2541 overlay_mapped_address(...): map an address from section's LMA to VMA
2542 overlay_unmapped_address(...): map an address from section's VMA to LMA
2543 symbol_overlayed_address(...): Return a "current" address for symbol:
2544 either in VMA or LMA depending on whether
2545 the symbol's section is currently mapped
2548 /* Overlay debugging state: */
2550 int overlay_debugging = 0; /* 0 == off, 1 == manual, -1 == auto */
2551 int overlay_cache_invalid = 0; /* True if need to refresh mapped state */
2553 /* Target vector for refreshing overlay mapped state */
2554 static void simple_overlay_update (struct obj_section *);
2555 void (*target_overlay_update) (struct obj_section *) = simple_overlay_update;
2557 /* Function: section_is_overlay (SECTION)
2558 Returns true if SECTION has VMA not equal to LMA, ie.
2559 SECTION is loaded at an address different from where it will "run". */
2562 section_is_overlay (section)
2565 if (overlay_debugging)
2566 if (section && section->lma != 0 &&
2567 section->vma != section->lma)
2573 /* Function: overlay_invalidate_all (void)
2574 Invalidate the mapped state of all overlay sections (mark it as stale). */
2577 overlay_invalidate_all ()
2579 struct objfile *objfile;
2580 struct obj_section *sect;
2582 ALL_OBJSECTIONS (objfile, sect)
2583 if (section_is_overlay (sect->the_bfd_section))
2584 sect->ovly_mapped = -1;
2587 /* Function: overlay_is_mapped (SECTION)
2588 Returns true if section is an overlay, and is currently mapped.
2589 Private: public access is thru function section_is_mapped.
2591 Access to the ovly_mapped flag is restricted to this function, so
2592 that we can do automatic update. If the global flag
2593 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2594 overlay_invalidate_all. If the mapped state of the particular
2595 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2598 overlay_is_mapped (osect)
2599 struct obj_section *osect;
2601 if (osect == 0 || !section_is_overlay (osect->the_bfd_section))
2604 switch (overlay_debugging)
2608 return 0; /* overlay debugging off */
2609 case -1: /* overlay debugging automatic */
2610 /* Unles there is a target_overlay_update function,
2611 there's really nothing useful to do here (can't really go auto) */
2612 if (target_overlay_update)
2614 if (overlay_cache_invalid)
2616 overlay_invalidate_all ();
2617 overlay_cache_invalid = 0;
2619 if (osect->ovly_mapped == -1)
2620 (*target_overlay_update) (osect);
2622 /* fall thru to manual case */
2623 case 1: /* overlay debugging manual */
2624 return osect->ovly_mapped == 1;
2628 /* Function: section_is_mapped
2629 Returns true if section is an overlay, and is currently mapped. */
2632 section_is_mapped (section)
2635 struct objfile *objfile;
2636 struct obj_section *osect;
2638 if (overlay_debugging)
2639 if (section && section_is_overlay (section))
2640 ALL_OBJSECTIONS (objfile, osect)
2641 if (osect->the_bfd_section == section)
2642 return overlay_is_mapped (osect);
2647 /* Function: pc_in_unmapped_range
2648 If PC falls into the lma range of SECTION, return true, else false. */
2651 pc_in_unmapped_range (pc, section)
2657 if (overlay_debugging)
2658 if (section && section_is_overlay (section))
2660 size = bfd_get_section_size_before_reloc (section);
2661 if (section->lma <= pc && pc < section->lma + size)
2667 /* Function: pc_in_mapped_range
2668 If PC falls into the vma range of SECTION, return true, else false. */
2671 pc_in_mapped_range (pc, section)
2677 if (overlay_debugging)
2678 if (section && section_is_overlay (section))
2680 size = bfd_get_section_size_before_reloc (section);
2681 if (section->vma <= pc && pc < section->vma + size)
2687 /* Function: overlay_unmapped_address (PC, SECTION)
2688 Returns the address corresponding to PC in the unmapped (load) range.
2689 May be the same as PC. */
2692 overlay_unmapped_address (pc, section)
2696 if (overlay_debugging)
2697 if (section && section_is_overlay (section) &&
2698 pc_in_mapped_range (pc, section))
2699 return pc + section->lma - section->vma;
2704 /* Function: overlay_mapped_address (PC, SECTION)
2705 Returns the address corresponding to PC in the mapped (runtime) range.
2706 May be the same as PC. */
2709 overlay_mapped_address (pc, section)
2713 if (overlay_debugging)
2714 if (section && section_is_overlay (section) &&
2715 pc_in_unmapped_range (pc, section))
2716 return pc + section->vma - section->lma;
2722 /* Function: symbol_overlayed_address
2723 Return one of two addresses (relative to the VMA or to the LMA),
2724 depending on whether the section is mapped or not. */
2727 symbol_overlayed_address (address, section)
2731 if (overlay_debugging)
2733 /* If the symbol has no section, just return its regular address. */
2736 /* If the symbol's section is not an overlay, just return its address */
2737 if (!section_is_overlay (section))
2739 /* If the symbol's section is mapped, just return its address */
2740 if (section_is_mapped (section))
2743 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
2744 * then return its LOADED address rather than its vma address!!
2746 return overlay_unmapped_address (address, section);
2751 /* Function: find_pc_overlay (PC)
2752 Return the best-match overlay section for PC:
2753 If PC matches a mapped overlay section's VMA, return that section.
2754 Else if PC matches an unmapped section's VMA, return that section.
2755 Else if PC matches an unmapped section's LMA, return that section. */
2758 find_pc_overlay (pc)
2761 struct objfile *objfile;
2762 struct obj_section *osect, *best_match = NULL;
2764 if (overlay_debugging)
2765 ALL_OBJSECTIONS (objfile, osect)
2766 if (section_is_overlay (osect->the_bfd_section))
2768 if (pc_in_mapped_range (pc, osect->the_bfd_section))
2770 if (overlay_is_mapped (osect))
2771 return osect->the_bfd_section;
2775 else if (pc_in_unmapped_range (pc, osect->the_bfd_section))
2778 return best_match ? best_match->the_bfd_section : NULL;
2781 /* Function: find_pc_mapped_section (PC)
2782 If PC falls into the VMA address range of an overlay section that is
2783 currently marked as MAPPED, return that section. Else return NULL. */
2786 find_pc_mapped_section (pc)
2789 struct objfile *objfile;
2790 struct obj_section *osect;
2792 if (overlay_debugging)
2793 ALL_OBJSECTIONS (objfile, osect)
2794 if (pc_in_mapped_range (pc, osect->the_bfd_section) &&
2795 overlay_is_mapped (osect))
2796 return osect->the_bfd_section;
2801 /* Function: list_overlays_command
2802 Print a list of mapped sections and their PC ranges */
2805 list_overlays_command (args, from_tty)
2810 struct objfile *objfile;
2811 struct obj_section *osect;
2813 if (overlay_debugging)
2814 ALL_OBJSECTIONS (objfile, osect)
2815 if (overlay_is_mapped (osect))
2821 vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section);
2822 lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section);
2823 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
2824 name = bfd_section_name (objfile->obfd, osect->the_bfd_section);
2826 printf_filtered ("Section %s, loaded at ", name);
2827 print_address_numeric (lma, 1, gdb_stdout);
2828 puts_filtered (" - ");
2829 print_address_numeric (lma + size, 1, gdb_stdout);
2830 printf_filtered (", mapped at ");
2831 print_address_numeric (vma, 1, gdb_stdout);
2832 puts_filtered (" - ");
2833 print_address_numeric (vma + size, 1, gdb_stdout);
2834 puts_filtered ("\n");
2839 printf_filtered ("No sections are mapped.\n");
2842 /* Function: map_overlay_command
2843 Mark the named section as mapped (ie. residing at its VMA address). */
2846 map_overlay_command (args, from_tty)
2850 struct objfile *objfile, *objfile2;
2851 struct obj_section *sec, *sec2;
2854 if (!overlay_debugging)
2856 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
2857 the 'overlay manual' command.");
2859 if (args == 0 || *args == 0)
2860 error ("Argument required: name of an overlay section");
2862 /* First, find a section matching the user supplied argument */
2863 ALL_OBJSECTIONS (objfile, sec)
2864 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
2866 /* Now, check to see if the section is an overlay. */
2867 bfdsec = sec->the_bfd_section;
2868 if (!section_is_overlay (bfdsec))
2869 continue; /* not an overlay section */
2871 /* Mark the overlay as "mapped" */
2872 sec->ovly_mapped = 1;
2874 /* Next, make a pass and unmap any sections that are
2875 overlapped by this new section: */
2876 ALL_OBJSECTIONS (objfile2, sec2)
2877 if (sec2->ovly_mapped &&
2879 sec->the_bfd_section != sec2->the_bfd_section &&
2880 (pc_in_mapped_range (sec2->addr, sec->the_bfd_section) ||
2881 pc_in_mapped_range (sec2->endaddr, sec->the_bfd_section)))
2884 printf_filtered ("Note: section %s unmapped by overlap\n",
2885 bfd_section_name (objfile->obfd,
2886 sec2->the_bfd_section));
2887 sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2 */
2891 error ("No overlay section called %s", args);
2894 /* Function: unmap_overlay_command
2895 Mark the overlay section as unmapped
2896 (ie. resident in its LMA address range, rather than the VMA range). */
2899 unmap_overlay_command (args, from_tty)
2903 struct objfile *objfile;
2904 struct obj_section *sec;
2906 if (!overlay_debugging)
2908 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
2909 the 'overlay manual' command.");
2911 if (args == 0 || *args == 0)
2912 error ("Argument required: name of an overlay section");
2914 /* First, find a section matching the user supplied argument */
2915 ALL_OBJSECTIONS (objfile, sec)
2916 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
2918 if (!sec->ovly_mapped)
2919 error ("Section %s is not mapped", args);
2920 sec->ovly_mapped = 0;
2923 error ("No overlay section called %s", args);
2926 /* Function: overlay_auto_command
2927 A utility command to turn on overlay debugging.
2928 Possibly this should be done via a set/show command. */
2931 overlay_auto_command (args, from_tty)
2935 overlay_debugging = -1;
2937 printf_filtered ("Automatic overlay debugging enabled.");
2940 /* Function: overlay_manual_command
2941 A utility command to turn on overlay debugging.
2942 Possibly this should be done via a set/show command. */
2945 overlay_manual_command (args, from_tty)
2949 overlay_debugging = 1;
2951 printf_filtered ("Overlay debugging enabled.");
2954 /* Function: overlay_off_command
2955 A utility command to turn on overlay debugging.
2956 Possibly this should be done via a set/show command. */
2959 overlay_off_command (args, from_tty)
2963 overlay_debugging = 0;
2965 printf_filtered ("Overlay debugging disabled.");
2969 overlay_load_command (args, from_tty)
2973 if (target_overlay_update)
2974 (*target_overlay_update) (NULL);
2976 error ("This target does not know how to read its overlay state.");
2979 /* Function: overlay_command
2980 A place-holder for a mis-typed command */
2982 /* Command list chain containing all defined "overlay" subcommands. */
2983 struct cmd_list_element *overlaylist;
2986 overlay_command (args, from_tty)
2991 ("\"overlay\" must be followed by the name of an overlay command.\n");
2992 help_list (overlaylist, "overlay ", -1, gdb_stdout);
2996 /* Target Overlays for the "Simplest" overlay manager:
2998 This is GDB's default target overlay layer. It works with the
2999 minimal overlay manager supplied as an example by Cygnus. The
3000 entry point is via a function pointer "target_overlay_update",
3001 so targets that use a different runtime overlay manager can
3002 substitute their own overlay_update function and take over the
3005 The overlay_update function pokes around in the target's data structures
3006 to see what overlays are mapped, and updates GDB's overlay mapping with
3009 In this simple implementation, the target data structures are as follows:
3010 unsigned _novlys; /# number of overlay sections #/
3011 unsigned _ovly_table[_novlys][4] = {
3012 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3013 {..., ..., ..., ...},
3015 unsigned _novly_regions; /# number of overlay regions #/
3016 unsigned _ovly_region_table[_novly_regions][3] = {
3017 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3020 These functions will attempt to update GDB's mappedness state in the
3021 symbol section table, based on the target's mappedness state.
3023 To do this, we keep a cached copy of the target's _ovly_table, and
3024 attempt to detect when the cached copy is invalidated. The main
3025 entry point is "simple_overlay_update(SECT), which looks up SECT in
3026 the cached table and re-reads only the entry for that section from
3027 the target (whenever possible).
3030 /* Cached, dynamically allocated copies of the target data structures: */
3031 static unsigned (*cache_ovly_table)[4] = 0;
3033 static unsigned (*cache_ovly_region_table)[3] = 0;
3035 static unsigned cache_novlys = 0;
3037 static unsigned cache_novly_regions = 0;
3039 static CORE_ADDR cache_ovly_table_base = 0;
3041 static CORE_ADDR cache_ovly_region_table_base = 0;
3045 VMA, SIZE, LMA, MAPPED
3047 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
3049 /* Throw away the cached copy of _ovly_table */
3051 simple_free_overlay_table ()
3053 if (cache_ovly_table)
3054 free (cache_ovly_table);
3056 cache_ovly_table = NULL;
3057 cache_ovly_table_base = 0;
3061 /* Throw away the cached copy of _ovly_region_table */
3063 simple_free_overlay_region_table ()
3065 if (cache_ovly_region_table)
3066 free (cache_ovly_region_table);
3067 cache_novly_regions = 0;
3068 cache_ovly_region_table = NULL;
3069 cache_ovly_region_table_base = 0;
3073 /* Read an array of ints from the target into a local buffer.
3074 Convert to host order. int LEN is number of ints */
3076 read_target_long_array (memaddr, myaddr, len)
3078 unsigned int *myaddr;
3081 char *buf = alloca (len * TARGET_LONG_BYTES);
3084 read_memory (memaddr, buf, len * TARGET_LONG_BYTES);
3085 for (i = 0; i < len; i++)
3086 myaddr[i] = extract_unsigned_integer (TARGET_LONG_BYTES * i + buf,
3090 /* Find and grab a copy of the target _ovly_table
3091 (and _novlys, which is needed for the table's size) */
3093 simple_read_overlay_table ()
3095 struct minimal_symbol *msym;
3097 simple_free_overlay_table ();
3098 msym = lookup_minimal_symbol ("_novlys", 0, 0);
3100 cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4);
3102 return 0; /* failure */
3103 cache_ovly_table = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table));
3104 if (cache_ovly_table != NULL)
3106 msym = lookup_minimal_symbol ("_ovly_table", 0, 0);
3109 cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (msym);
3110 read_target_long_array (cache_ovly_table_base,
3111 (int *) cache_ovly_table,
3115 return 0; /* failure */
3118 return 0; /* failure */
3119 return 1; /* SUCCESS */
3123 /* Find and grab a copy of the target _ovly_region_table
3124 (and _novly_regions, which is needed for the table's size) */
3126 simple_read_overlay_region_table ()
3128 struct minimal_symbol *msym;
3130 simple_free_overlay_region_table ();
3131 msym = lookup_minimal_symbol ("_novly_regions", 0, 0);
3133 cache_novly_regions = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4);
3135 return 0; /* failure */
3136 cache_ovly_region_table = (void *) xmalloc (cache_novly_regions * 12);
3137 if (cache_ovly_region_table != NULL)
3139 msym = lookup_minimal_symbol ("_ovly_region_table", 0, 0);
3142 cache_ovly_region_table_base = SYMBOL_VALUE_ADDRESS (msym);
3143 read_target_long_array (cache_ovly_region_table_base,
3144 (int *) cache_ovly_region_table,
3145 cache_novly_regions * 3);
3148 return 0; /* failure */
3151 return 0; /* failure */
3152 return 1; /* SUCCESS */
3156 /* Function: simple_overlay_update_1
3157 A helper function for simple_overlay_update. Assuming a cached copy
3158 of _ovly_table exists, look through it to find an entry whose vma,
3159 lma and size match those of OSECT. Re-read the entry and make sure
3160 it still matches OSECT (else the table may no longer be valid).
3161 Set OSECT's mapped state to match the entry. Return: 1 for
3162 success, 0 for failure. */
3165 simple_overlay_update_1 (osect)
3166 struct obj_section *osect;
3170 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
3171 for (i = 0; i < cache_novlys; i++)
3172 if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma &&
3173 cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* &&
3174 cache_ovly_table[i][SIZE] == size */ )
3176 read_target_long_array (cache_ovly_table_base + i * TARGET_LONG_BYTES,
3177 (int *) cache_ovly_table[i], 4);
3178 if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma &&
3179 cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* &&
3180 cache_ovly_table[i][SIZE] == size */ )
3182 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3185 else /* Warning! Warning! Target's ovly table has changed! */
3191 /* Function: simple_overlay_update
3192 If OSECT is NULL, then update all sections' mapped state
3193 (after re-reading the entire target _ovly_table).
3194 If OSECT is non-NULL, then try to find a matching entry in the
3195 cached ovly_table and update only OSECT's mapped state.
3196 If a cached entry can't be found or the cache isn't valid, then
3197 re-read the entire cache, and go ahead and update all sections. */
3200 simple_overlay_update (osect)
3201 struct obj_section *osect;
3203 struct objfile *objfile;
3205 /* Were we given an osect to look up? NULL means do all of them. */
3207 /* Have we got a cached copy of the target's overlay table? */
3208 if (cache_ovly_table != NULL)
3209 /* Does its cached location match what's currently in the symtab? */
3210 if (cache_ovly_table_base ==
3211 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", 0, 0)))
3212 /* Then go ahead and try to look up this single section in the cache */
3213 if (simple_overlay_update_1 (osect))
3214 /* Found it! We're done. */
3217 /* Cached table no good: need to read the entire table anew.
3218 Or else we want all the sections, in which case it's actually
3219 more efficient to read the whole table in one block anyway. */
3221 if (simple_read_overlay_table () == 0) /* read failed? No table? */
3223 warning ("Failed to read the target overlay mapping table.");
3226 /* Now may as well update all sections, even if only one was requested. */
3227 ALL_OBJSECTIONS (objfile, osect)
3228 if (section_is_overlay (osect->the_bfd_section))
3232 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
3233 for (i = 0; i < cache_novlys; i++)
3234 if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma &&
3235 cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* &&
3236 cache_ovly_table[i][SIZE] == size */ )
3237 { /* obj_section matches i'th entry in ovly_table */
3238 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3239 break; /* finished with inner for loop: break out */
3246 _initialize_symfile ()
3248 struct cmd_list_element *c;
3250 c = add_cmd ("symbol-file", class_files, symbol_file_command,
3251 "Load symbol table from executable file FILE.\n\
3252 The `file' command can also load symbol tables, as well as setting the file\n\
3253 to execute.", &cmdlist);
3254 c->completer = filename_completer;
3256 c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command,
3257 "Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3258 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3259 ADDR is the starting address of the file's text.\n\
3260 The optional arguments are section-name section-address pairs and\n\
3261 should be specified if the data and bss segments are not contiguous\n\
3262 with the text. SECT is a section name to be loaded at SECT_ADDR.",
3264 c->completer = filename_completer;
3266 c = add_cmd ("add-shared-symbol-files", class_files,
3267 add_shared_symbol_files_command,
3268 "Load the symbols from shared objects in the dynamic linker's link map.",
3270 c = add_alias_cmd ("assf", "add-shared-symbol-files", class_files, 1,
3273 c = add_cmd ("load", class_files, load_command,
3274 "Dynamically load FILE into the running program, and record its symbols\n\
3275 for access from GDB.", &cmdlist);
3276 c->completer = filename_completer;
3279 (add_set_cmd ("symbol-reloading", class_support, var_boolean,
3280 (char *) &symbol_reloading,
3281 "Set dynamic symbol table reloading multiple times in one run.",
3285 add_prefix_cmd ("overlay", class_support, overlay_command,
3286 "Commands for debugging overlays.", &overlaylist,
3287 "overlay ", 0, &cmdlist);
3289 add_com_alias ("ovly", "overlay", class_alias, 1);
3290 add_com_alias ("ov", "overlay", class_alias, 1);
3292 add_cmd ("map-overlay", class_support, map_overlay_command,
3293 "Assert that an overlay section is mapped.", &overlaylist);
3295 add_cmd ("unmap-overlay", class_support, unmap_overlay_command,
3296 "Assert that an overlay section is unmapped.", &overlaylist);
3298 add_cmd ("list-overlays", class_support, list_overlays_command,
3299 "List mappings of overlay sections.", &overlaylist);
3301 add_cmd ("manual", class_support, overlay_manual_command,
3302 "Enable overlay debugging.", &overlaylist);
3303 add_cmd ("off", class_support, overlay_off_command,
3304 "Disable overlay debugging.", &overlaylist);
3305 add_cmd ("auto", class_support, overlay_auto_command,
3306 "Enable automatic overlay debugging.", &overlaylist);
3307 add_cmd ("load-target", class_support, overlay_load_command,
3308 "Read the overlay mapping state from the target.", &overlaylist);
3310 /* Filename extension to source language lookup table: */
3311 init_filename_language_table ();
3312 c = add_set_cmd ("extension-language", class_files, var_string_noescape,
3314 "Set mapping between filename extension and source language.\n\
3315 Usage: set extension-language .foo bar",
3317 c->function.cfunc = set_ext_lang_command;
3319 add_info ("extensions", info_ext_lang_command,
3320 "All filename extensions associated with a source language.");
3323 (add_set_cmd ("download-write-size", class_obscure,
3324 var_integer, (char *) &download_write_size,
3325 "Set the write size used when downloading a program.\n"
3326 "Only used when downloading a program onto a remote\n"
3327 "target. Specify zero, or a negative value, to disable\n"
3328 "blocked writes. The actual size of each transfer is also\n"
3329 "limited by the size of the target packet and the memory\n"