1 /* Generic symbol file reading for the GNU debugger, GDB.
2 Copyright 1990-1996, 1998, 2000 Free Software Foundation, Inc.
3 Contributed by Cygnus Support, using pieces from other GDB modules.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
32 #include "breakpoint.h"
34 #include "complaints.h"
36 #include "inferior.h" /* for write_pc */
37 #include "gdb-stabs.h"
41 #include <sys/types.h>
43 #include "gdb_string.h"
54 /* Some HP-UX related globals to clear when a new "main"
55 symbol file is loaded. HP-specific. */
57 extern int hp_som_som_object_present;
58 extern int hp_cxx_exception_support_initialized;
59 #define RESET_HP_UX_GLOBALS() do {\
60 hp_som_som_object_present = 0; /* indicates HP-compiled code */ \
61 hp_cxx_exception_support_initialized = 0; /* must reinitialize exception stuff */ \
65 int (*ui_load_progress_hook) (const char *section, unsigned long num);
66 void (*show_load_progress) (const char *section,
67 unsigned long section_sent,
68 unsigned long section_size,
69 unsigned long total_sent,
70 unsigned long total_size);
71 void (*pre_add_symbol_hook) PARAMS ((char *));
72 void (*post_add_symbol_hook) PARAMS ((void));
73 void (*target_new_objfile_hook) PARAMS ((struct objfile *));
75 /* Global variables owned by this file */
76 int readnow_symbol_files; /* Read full symbols immediately */
78 struct complaint oldsyms_complaint =
80 "Replacing old symbols for `%s'", 0, 0
83 struct complaint empty_symtab_complaint =
85 "Empty symbol table found for `%s'", 0, 0
88 struct complaint unknown_option_complaint =
90 "Unknown option `%s' ignored", 0, 0
93 /* External variables and functions referenced. */
95 extern int info_verbose;
97 extern void report_transfer_performance PARAMS ((unsigned long,
100 /* Functions this file defines */
103 static int simple_read_overlay_region_table PARAMS ((void));
104 static void simple_free_overlay_region_table PARAMS ((void));
107 static void set_initial_language PARAMS ((void));
109 static void load_command PARAMS ((char *, int));
111 static void add_symbol_file_command PARAMS ((char *, int));
113 static void add_shared_symbol_files_command PARAMS ((char *, int));
115 static void cashier_psymtab PARAMS ((struct partial_symtab *));
117 static int compare_psymbols PARAMS ((const void *, const void *));
119 static int compare_symbols PARAMS ((const void *, const void *));
121 bfd *symfile_bfd_open PARAMS ((char *));
123 static void find_sym_fns PARAMS ((struct objfile *));
125 static void decrement_reading_symtab PARAMS ((void *));
127 static void overlay_invalidate_all PARAMS ((void));
129 static int overlay_is_mapped PARAMS ((struct obj_section *));
131 void list_overlays_command PARAMS ((char *, int));
133 void map_overlay_command PARAMS ((char *, int));
135 void unmap_overlay_command PARAMS ((char *, int));
137 static void overlay_auto_command PARAMS ((char *, int));
139 static void overlay_manual_command PARAMS ((char *, int));
141 static void overlay_off_command PARAMS ((char *, int));
143 static void overlay_load_command PARAMS ((char *, int));
145 static void overlay_command PARAMS ((char *, int));
147 static void simple_free_overlay_table PARAMS ((void));
149 static void read_target_long_array PARAMS ((CORE_ADDR, unsigned int *, int));
151 static int simple_read_overlay_table PARAMS ((void));
153 static int simple_overlay_update_1 PARAMS ((struct obj_section *));
155 static void add_filename_language PARAMS ((char *ext, enum language lang));
157 static void set_ext_lang_command PARAMS ((char *args, int from_tty));
159 static void info_ext_lang_command PARAMS ((char *args, int from_tty));
161 static void init_filename_language_table PARAMS ((void));
163 void _initialize_symfile PARAMS ((void));
165 /* List of all available sym_fns. On gdb startup, each object file reader
166 calls add_symtab_fns() to register information on each format it is
169 static struct sym_fns *symtab_fns = NULL;
171 /* Flag for whether user will be reloading symbols multiple times.
172 Defaults to ON for VxWorks, otherwise OFF. */
174 #ifdef SYMBOL_RELOADING_DEFAULT
175 int symbol_reloading = SYMBOL_RELOADING_DEFAULT;
177 int symbol_reloading = 0;
180 /* If non-zero, then on HP-UX (i.e., platforms that use somsolib.c),
181 this variable is interpreted as a threshhold. If adding a new
182 library's symbol table to those already known to the debugger would
183 exceed this threshhold, then the shlib's symbols are not added.
185 If non-zero on other platforms, shared library symbols will be added
186 automatically when the inferior is created, new libraries are loaded,
187 or when attaching to the inferior. This is almost always what users
188 will want to have happen; but for very large programs, the startup
189 time will be excessive, and so if this is a problem, the user can
190 clear this flag and then add the shared library symbols as needed.
191 Note that there is a potential for confusion, since if the shared
192 library symbols are not loaded, commands like "info fun" will *not*
193 report all the functions that are actually present.
195 Note that HP-UX interprets this variable to mean, "threshhold size
196 in megabytes, where zero means never add". Other platforms interpret
197 this variable to mean, "always add if non-zero, never add if zero."
200 int auto_solib_add = 1;
203 /* Since this function is called from within qsort, in an ANSI environment
204 it must conform to the prototype for qsort, which specifies that the
205 comparison function takes two "void *" pointers. */
208 compare_symbols (s1p, s2p)
212 register struct symbol **s1, **s2;
214 s1 = (struct symbol **) s1p;
215 s2 = (struct symbol **) s2p;
217 return (STRCMP (SYMBOL_NAME (*s1), SYMBOL_NAME (*s2)));
224 compare_psymbols -- compare two partial symbols by name
228 Given pointers to pointers to two partial symbol table entries,
229 compare them by name and return -N, 0, or +N (ala strcmp).
230 Typically used by sorting routines like qsort().
234 Does direct compare of first two characters before punting
235 and passing to strcmp for longer compares. Note that the
236 original version had a bug whereby two null strings or two
237 identically named one character strings would return the
238 comparison of memory following the null byte.
243 compare_psymbols (s1p, s2p)
247 register char *st1 = SYMBOL_NAME (*(struct partial_symbol **) s1p);
248 register char *st2 = SYMBOL_NAME (*(struct partial_symbol **) s2p);
250 if ((st1[0] - st2[0]) || !st1[0])
252 return (st1[0] - st2[0]);
254 else if ((st1[1] - st2[1]) || !st1[1])
256 return (st1[1] - st2[1]);
260 /* Note: I replaced the STRCMP line (commented out below)
261 * with a simpler "strcmp()" which compares the 2 strings
262 * from the beginning. (STRCMP is a macro which first compares
263 * the initial characters, then falls back on strcmp).
264 * The reason is that the STRCMP line was tickling a C compiler
265 * bug on HP-UX 10.30, which is avoided with the simpler
266 * code. The performance gain from the more complicated code
267 * is negligible, given that we have already checked the
268 * initial 2 characters above. I reported the compiler bug,
269 * and once it is fixed the original line can be put back. RT
271 /* return ( STRCMP (st1 + 2, st2 + 2)); */
272 return (strcmp (st1, st2));
277 sort_pst_symbols (pst)
278 struct partial_symtab *pst;
280 /* Sort the global list; don't sort the static list */
282 qsort (pst->objfile->global_psymbols.list + pst->globals_offset,
283 pst->n_global_syms, sizeof (struct partial_symbol *),
287 /* Call sort_block_syms to sort alphabetically the symbols of one block. */
291 register struct block *b;
293 qsort (&BLOCK_SYM (b, 0), BLOCK_NSYMS (b),
294 sizeof (struct symbol *), compare_symbols);
297 /* Call sort_symtab_syms to sort alphabetically
298 the symbols of each block of one symtab. */
302 register struct symtab *s;
304 register struct blockvector *bv;
307 register struct block *b;
311 bv = BLOCKVECTOR (s);
312 nbl = BLOCKVECTOR_NBLOCKS (bv);
313 for (i = 0; i < nbl; i++)
315 b = BLOCKVECTOR_BLOCK (bv, i);
316 if (BLOCK_SHOULD_SORT (b))
321 /* Make a null terminated copy of the string at PTR with SIZE characters in
322 the obstack pointed to by OBSTACKP . Returns the address of the copy.
323 Note that the string at PTR does not have to be null terminated, I.E. it
324 may be part of a larger string and we are only saving a substring. */
327 obsavestring (ptr, size, obstackp)
330 struct obstack *obstackp;
332 register char *p = (char *) obstack_alloc (obstackp, size + 1);
333 /* Open-coded memcpy--saves function call time. These strings are usually
334 short. FIXME: Is this really still true with a compiler that can
337 register char *p1 = ptr;
338 register char *p2 = p;
339 char *end = ptr + size;
347 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
348 in the obstack pointed to by OBSTACKP. */
351 obconcat (obstackp, s1, s2, s3)
352 struct obstack *obstackp;
353 const char *s1, *s2, *s3;
355 register int len = strlen (s1) + strlen (s2) + strlen (s3) + 1;
356 register char *val = (char *) obstack_alloc (obstackp, len);
363 /* True if we are nested inside psymtab_to_symtab. */
365 int currently_reading_symtab = 0;
368 decrement_reading_symtab (dummy)
371 currently_reading_symtab--;
374 /* Get the symbol table that corresponds to a partial_symtab.
375 This is fast after the first time you do it. In fact, there
376 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
380 psymtab_to_symtab (pst)
381 register struct partial_symtab *pst;
383 /* If it's been looked up before, return it. */
387 /* If it has not yet been read in, read it. */
390 struct cleanup *back_to = make_cleanup (decrement_reading_symtab, NULL);
391 currently_reading_symtab++;
392 (*pst->read_symtab) (pst);
393 do_cleanups (back_to);
399 /* Initialize entry point information for this objfile. */
402 init_entry_point_info (objfile)
403 struct objfile *objfile;
405 /* Save startup file's range of PC addresses to help blockframe.c
406 decide where the bottom of the stack is. */
408 if (bfd_get_file_flags (objfile->obfd) & EXEC_P)
410 /* Executable file -- record its entry point so we'll recognize
411 the startup file because it contains the entry point. */
412 objfile->ei.entry_point = bfd_get_start_address (objfile->obfd);
416 /* Examination of non-executable.o files. Short-circuit this stuff. */
417 objfile->ei.entry_point = INVALID_ENTRY_POINT;
419 objfile->ei.entry_file_lowpc = INVALID_ENTRY_LOWPC;
420 objfile->ei.entry_file_highpc = INVALID_ENTRY_HIGHPC;
421 objfile->ei.entry_func_lowpc = INVALID_ENTRY_LOWPC;
422 objfile->ei.entry_func_highpc = INVALID_ENTRY_HIGHPC;
423 objfile->ei.main_func_lowpc = INVALID_ENTRY_LOWPC;
424 objfile->ei.main_func_highpc = INVALID_ENTRY_HIGHPC;
427 /* Get current entry point address. */
430 entry_point_address ()
432 return symfile_objfile ? symfile_objfile->ei.entry_point : 0;
435 /* Remember the lowest-addressed loadable section we've seen.
436 This function is called via bfd_map_over_sections.
438 In case of equal vmas, the section with the largest size becomes the
439 lowest-addressed loadable section.
441 If the vmas and sizes are equal, the last section is considered the
442 lowest-addressed loadable section. */
445 find_lowest_section (abfd, sect, obj)
450 asection **lowest = (asection **) obj;
452 if (0 == (bfd_get_section_flags (abfd, sect) & SEC_LOAD))
455 *lowest = sect; /* First loadable section */
456 else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect))
457 *lowest = sect; /* A lower loadable section */
458 else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect)
459 && (bfd_section_size (abfd, (*lowest))
460 <= bfd_section_size (abfd, sect)))
465 /* Build (allocate and populate) a section_addr_info struct from
466 an existing section table. */
468 extern struct section_addr_info *
469 build_section_addr_info_from_section_table (const struct section_table *start,
470 const struct section_table *end)
472 struct section_addr_info *sap;
473 const struct section_table *stp;
476 sap = xmalloc (sizeof (struct section_addr_info));
477 memset (sap, 0, sizeof (struct section_addr_info));
479 for (stp = start, oidx = 0; stp != end; stp++)
481 if (stp->the_bfd_section->flags & (SEC_ALLOC | SEC_LOAD)
482 && oidx < MAX_SECTIONS)
484 sap->other[oidx].addr = stp->addr;
485 sap->other[oidx].name = xstrdup (stp->the_bfd_section->name);
486 sap->other[oidx].sectindex = stp->the_bfd_section->index;
495 /* Free all memory allocated by build_section_addr_info_from_section_table. */
498 free_section_addr_info (struct section_addr_info *sap)
502 for (idx = 0; idx < MAX_SECTIONS; idx++)
503 if (sap->other[idx].name)
504 free (sap->other[idx].name);
509 /* Parse the user's idea of an offset for dynamic linking, into our idea
510 of how to represent it for fast symbol reading. This is the default
511 version of the sym_fns.sym_offsets function for symbol readers that
512 don't need to do anything special. It allocates a section_offsets table
513 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
516 default_symfile_offsets (objfile, addrs)
517 struct objfile *objfile;
518 struct section_addr_info *addrs;
521 asection *sect = NULL;
523 objfile->num_sections = SECT_OFF_MAX;
524 objfile->section_offsets = (struct section_offsets *)
525 obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS);
526 memset (objfile->section_offsets, 0, SIZEOF_SECTION_OFFSETS);
528 /* Now calculate offsets for section that were specified by the
530 for (i = 0; i < MAX_SECTIONS && addrs->other[i].name; i++)
532 struct other_sections *osp ;
534 osp = &addrs->other[i] ;
538 /* Record all sections in offsets */
539 /* The section_offsets in the objfile are here filled in using
541 ANOFFSET (objfile->section_offsets, osp->sectindex) = osp->addr;
544 /* Remember the bfd indexes for the .text, .data, .bss and
547 sect = bfd_get_section_by_name (objfile->obfd, ".text");
549 objfile->sect_index_text = sect->index;
551 sect = bfd_get_section_by_name (objfile->obfd, ".data");
553 objfile->sect_index_data = sect->index;
555 sect = bfd_get_section_by_name (objfile->obfd, ".bss");
557 objfile->sect_index_bss = sect->index;
559 sect = bfd_get_section_by_name (objfile->obfd, ".rodata");
561 objfile->sect_index_rodata = sect->index;
565 /* Process a symbol file, as either the main file or as a dynamically
568 OBJFILE is where the symbols are to be read from.
570 ADDR is the address where the text segment was loaded, unless the
571 objfile is the main symbol file, in which case it is zero.
573 MAINLINE is nonzero if this is the main symbol file, or zero if
574 it's an extra symbol file such as dynamically loaded code.
576 VERBO is nonzero if the caller has printed a verbose message about
577 the symbol reading (and complaints can be more terse about it). */
580 syms_from_objfile (objfile, addrs, mainline, verbo)
581 struct objfile *objfile;
582 struct section_addr_info *addrs;
586 asection *lower_sect;
588 CORE_ADDR lower_offset;
589 struct section_addr_info local_addr;
590 struct cleanup *old_chain;
593 /* If ADDRS is NULL, initialize the local section_addr_info struct and
594 point ADDRS to it. We now establish the convention that an addr of
595 zero means no load address was specified. */
599 memset (&local_addr, 0, sizeof (local_addr));
603 init_entry_point_info (objfile);
604 find_sym_fns (objfile);
606 /* Make sure that partially constructed symbol tables will be cleaned up
607 if an error occurs during symbol reading. */
608 old_chain = make_cleanup ((make_cleanup_func) free_objfile, objfile);
612 /* We will modify the main symbol table, make sure that all its users
613 will be cleaned up if an error occurs during symbol reading. */
614 make_cleanup ((make_cleanup_func) clear_symtab_users, 0);
616 /* Since no error yet, throw away the old symbol table. */
618 if (symfile_objfile != NULL)
620 free_objfile (symfile_objfile);
621 symfile_objfile = NULL;
624 /* Currently we keep symbols from the add-symbol-file command.
625 If the user wants to get rid of them, they should do "symbol-file"
626 without arguments first. Not sure this is the best behavior
629 (*objfile->sf->sym_new_init) (objfile);
632 /* Convert addr into an offset rather than an absolute address.
633 We find the lowest address of a loaded segment in the objfile,
634 and assume that <addr> is where that got loaded.
636 We no longer warn if the lowest section is not a text segment (as
637 happens for the PA64 port. */
640 /* Find lowest loadable section to be used as starting point for
641 continguous sections. FIXME!! won't work without call to find
642 .text first, but this assumes text is lowest section. */
643 lower_sect = bfd_get_section_by_name (objfile->obfd, ".text");
644 if (lower_sect == NULL)
645 bfd_map_over_sections (objfile->obfd, find_lowest_section,
647 if (lower_sect == NULL)
648 warning ("no loadable sections found in added symbol-file %s",
651 if ((bfd_get_section_flags (objfile->obfd, lower_sect) & SEC_CODE) == 0)
652 warning ("Lowest section in %s is %s at %s",
654 bfd_section_name (objfile->obfd, lower_sect),
655 paddr (bfd_section_vma (objfile->obfd, lower_sect)));
656 if (lower_sect != NULL)
657 lower_offset = bfd_section_vma (objfile->obfd, lower_sect);
661 /* Calculate offsets for the loadable sections.
662 FIXME! Sections must be in order of increasing loadable section
663 so that contiguous sections can use the lower-offset!!!
665 Adjust offsets if the segments are not contiguous.
666 If the section is contiguous, its offset should be set to
667 the offset of the highest loadable section lower than it
668 (the loadable section directly below it in memory).
669 this_offset = lower_offset = lower_addr - lower_orig_addr */
671 /* Calculate offsets for sections. */
672 for (i=0 ; i < MAX_SECTIONS && addrs->other[i].name; i++)
674 if (addrs->other[i].addr != 0)
676 sect = bfd_get_section_by_name (objfile->obfd, addrs->other[i].name);
679 addrs->other[i].addr -= bfd_section_vma (objfile->obfd, sect);
680 lower_offset = addrs->other[i].addr;
681 /* This is the index used by BFD. */
682 addrs->other[i].sectindex = sect->index ;
686 warning ("section %s not found in %s", addrs->other[i].name,
688 addrs->other[i].addr = 0;
692 addrs->other[i].addr = lower_offset;
696 /* Initialize symbol reading routines for this objfile, allow complaints to
697 appear for this new file, and record how verbose to be, then do the
698 initial symbol reading for this file. */
700 (*objfile->sf->sym_init) (objfile);
701 clear_complaints (1, verbo);
703 (*objfile->sf->sym_offsets) (objfile, addrs);
705 #ifndef IBM6000_TARGET
706 /* This is a SVR4/SunOS specific hack, I think. In any event, it
707 screws RS/6000. sym_offsets should be doing this sort of thing,
708 because it knows the mapping between bfd sections and
710 /* This is a hack. As far as I can tell, section offsets are not
711 target dependent. They are all set to addr with a couple of
712 exceptions. The exceptions are sysvr4 shared libraries, whose
713 offsets are kept in solib structures anyway and rs6000 xcoff
714 which handles shared libraries in a completely unique way.
716 Section offsets are built similarly, except that they are built
717 by adding addr in all cases because there is no clear mapping
718 from section_offsets into actual sections. Note that solib.c
719 has a different algorithm for finding section offsets.
721 These should probably all be collapsed into some target
722 independent form of shared library support. FIXME. */
726 struct obj_section *s;
728 /* Map section offsets in "addr" back to the object's
729 sections by comparing the section names with bfd's
730 section names. Then adjust the section address by
731 the offset. */ /* for gdb/13815 */
733 ALL_OBJFILE_OSECTIONS (objfile, s)
735 CORE_ADDR s_addr = 0;
739 !s_addr && i < MAX_SECTIONS && addrs->other[i].name;
741 if (strcmp (s->the_bfd_section->name, addrs->other[i].name) == 0)
742 s_addr = addrs->other[i].addr; /* end added for gdb/13815 */
744 s->addr -= s->offset;
746 s->endaddr -= s->offset;
747 s->endaddr += s_addr;
751 #endif /* not IBM6000_TARGET */
753 (*objfile->sf->sym_read) (objfile, mainline);
755 if (!have_partial_symbols () && !have_full_symbols ())
758 printf_filtered ("(no debugging symbols found)...");
762 /* Don't allow char * to have a typename (else would get caddr_t).
763 Ditto void *. FIXME: Check whether this is now done by all the
764 symbol readers themselves (many of them now do), and if so remove
767 TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0;
768 TYPE_NAME (lookup_pointer_type (builtin_type_void)) = 0;
770 /* Mark the objfile has having had initial symbol read attempted. Note
771 that this does not mean we found any symbols... */
773 objfile->flags |= OBJF_SYMS;
775 /* Discard cleanups as symbol reading was successful. */
777 discard_cleanups (old_chain);
779 /* Call this after reading in a new symbol table to give target
780 dependant code a crack at the new symbols. For instance, this
781 could be used to update the values of target-specific symbols GDB
782 needs to keep track of (such as _sigtramp, or whatever). */
784 TARGET_SYMFILE_POSTREAD (objfile);
787 /* Perform required actions after either reading in the initial
788 symbols for a new objfile, or mapping in the symbols from a reusable
792 new_symfile_objfile (objfile, mainline, verbo)
793 struct objfile *objfile;
798 /* If this is the main symbol file we have to clean up all users of the
799 old main symbol file. Otherwise it is sufficient to fixup all the
800 breakpoints that may have been redefined by this symbol file. */
803 /* OK, make it the "real" symbol file. */
804 symfile_objfile = objfile;
806 clear_symtab_users ();
810 breakpoint_re_set ();
813 /* We're done reading the symbol file; finish off complaints. */
814 clear_complaints (0, verbo);
817 /* Process a symbol file, as either the main file or as a dynamically
820 NAME is the file name (which will be tilde-expanded and made
821 absolute herein) (but we don't free or modify NAME itself).
822 FROM_TTY says how verbose to be. MAINLINE specifies whether this
823 is the main symbol file, or whether it's an extra symbol file such
824 as dynamically loaded code. If !mainline, ADDR is the address
825 where the text segment was loaded.
827 Upon success, returns a pointer to the objfile that was added.
828 Upon failure, jumps back to command level (never returns). */
831 symbol_file_add (name, from_tty, addrs, mainline, flags)
834 struct section_addr_info *addrs;
838 struct objfile *objfile;
839 struct partial_symtab *psymtab;
842 /* Open a bfd for the file, and give user a chance to burp if we'd be
843 interactively wiping out any existing symbols. */
845 abfd = symfile_bfd_open (name);
847 if ((have_full_symbols () || have_partial_symbols ())
850 && !query ("Load new symbol table from \"%s\"? ", name))
851 error ("Not confirmed.");
853 objfile = allocate_objfile (abfd, flags);
855 /* If the objfile uses a mapped symbol file, and we have a psymtab for
856 it, then skip reading any symbols at this time. */
858 if ((objfile->flags & OBJF_MAPPED) && (objfile->flags & OBJF_SYMS))
860 /* We mapped in an existing symbol table file that already has had
861 initial symbol reading performed, so we can skip that part. Notify
862 the user that instead of reading the symbols, they have been mapped.
864 if (from_tty || info_verbose)
866 printf_filtered ("Mapped symbols for %s...", name);
868 gdb_flush (gdb_stdout);
870 init_entry_point_info (objfile);
871 find_sym_fns (objfile);
875 /* We either created a new mapped symbol table, mapped an existing
876 symbol table file which has not had initial symbol reading
877 performed, or need to read an unmapped symbol table. */
878 if (from_tty || info_verbose)
880 if (pre_add_symbol_hook)
881 pre_add_symbol_hook (name);
884 printf_filtered ("Reading symbols from %s...", name);
886 gdb_flush (gdb_stdout);
889 syms_from_objfile (objfile, addrs, mainline, from_tty);
892 /* We now have at least a partial symbol table. Check to see if the
893 user requested that all symbols be read on initial access via either
894 the gdb startup command line or on a per symbol file basis. Expand
895 all partial symbol tables for this objfile if so. */
897 if ((flags & OBJF_READNOW) || readnow_symbol_files)
899 if (from_tty || info_verbose)
901 printf_filtered ("expanding to full symbols...");
903 gdb_flush (gdb_stdout);
906 for (psymtab = objfile->psymtabs;
908 psymtab = psymtab->next)
910 psymtab_to_symtab (psymtab);
914 if (from_tty || info_verbose)
916 if (post_add_symbol_hook)
917 post_add_symbol_hook ();
920 printf_filtered ("done.\n");
921 gdb_flush (gdb_stdout);
925 new_symfile_objfile (objfile, mainline, from_tty);
927 if (target_new_objfile_hook)
928 target_new_objfile_hook (objfile);
933 /* This is the symbol-file command. Read the file, analyze its
934 symbols, and add a struct symtab to a symtab list. The syntax of
935 the command is rather bizarre--(1) buildargv implements various
936 quoting conventions which are undocumented and have little or
937 nothing in common with the way things are quoted (or not quoted)
938 elsewhere in GDB, (2) options are used, which are not generally
939 used in GDB (perhaps "set mapped on", "set readnow on" would be
940 better), (3) the order of options matters, which is contrary to GNU
941 conventions (because it is confusing and inconvenient). */
942 /* Note: ezannoni 2000-04-17. This function used to have support for
943 rombug (see remote-os9k.c). It consisted of a call to target_link()
944 (target.c) to get the address of the text segment from the target,
945 and pass that to symbol_file_add(). This is no longer supported. */
948 symbol_file_command (args, from_tty)
954 struct cleanup *cleanups;
955 int flags = OBJF_USERLOADED;
961 if ((have_full_symbols () || have_partial_symbols ())
963 && !query ("Discard symbol table from `%s'? ",
964 symfile_objfile->name))
965 error ("Not confirmed.");
966 free_all_objfiles ();
968 /* solib descriptors may have handles to objfiles. Since their
969 storage has just been released, we'd better wipe the solib
972 #if defined(SOLIB_RESTART)
976 symfile_objfile = NULL;
978 printf_unfiltered ("No symbol file now.\n");
980 RESET_HP_UX_GLOBALS ();
985 if ((argv = buildargv (args)) == NULL)
989 cleanups = make_cleanup_freeargv (argv);
990 while (*argv != NULL)
992 if (STREQ (*argv, "-mapped"))
993 flags |= OBJF_MAPPED;
995 if (STREQ (*argv, "-readnow"))
996 flags |= OBJF_READNOW;
999 error ("unknown option `%s'", *argv);
1003 symbol_file_add (name, from_tty, NULL, 1, flags);
1005 RESET_HP_UX_GLOBALS ();
1007 /* Getting new symbols may change our opinion about
1008 what is frameless. */
1009 reinit_frame_cache ();
1011 set_initial_language ();
1018 error ("no symbol file name was specified");
1020 TUIDO (((TuiOpaqueFuncPtr) tuiDisplayMainFunction));
1021 do_cleanups (cleanups);
1025 /* Set the initial language.
1027 A better solution would be to record the language in the psymtab when reading
1028 partial symbols, and then use it (if known) to set the language. This would
1029 be a win for formats that encode the language in an easily discoverable place,
1030 such as DWARF. For stabs, we can jump through hoops looking for specially
1031 named symbols or try to intuit the language from the specific type of stabs
1032 we find, but we can't do that until later when we read in full symbols.
1036 set_initial_language ()
1038 struct partial_symtab *pst;
1039 enum language lang = language_unknown;
1041 pst = find_main_psymtab ();
1044 if (pst->filename != NULL)
1046 lang = deduce_language_from_filename (pst->filename);
1048 if (lang == language_unknown)
1050 /* Make C the default language */
1053 set_language (lang);
1054 expected_language = current_language; /* Don't warn the user */
1058 /* Open file specified by NAME and hand it off to BFD for preliminary
1059 analysis. Result is a newly initialized bfd *, which includes a newly
1060 malloc'd` copy of NAME (tilde-expanded and made absolute).
1061 In case of trouble, error() is called. */
1064 symfile_bfd_open (name)
1069 char *absolute_name;
1073 name = tilde_expand (name); /* Returns 1st new malloc'd copy */
1075 /* Look down path for it, allocate 2nd new malloc'd copy. */
1076 desc = openp (getenv ("PATH"), 1, name, O_RDONLY | O_BINARY, 0, &absolute_name);
1077 #if defined(__GO32__) || defined(_WIN32)
1080 char *exename = alloca (strlen (name) + 5);
1081 strcat (strcpy (exename, name), ".exe");
1082 desc = openp (getenv ("PATH"), 1, exename, O_RDONLY | O_BINARY,
1088 make_cleanup (free, name);
1089 perror_with_name (name);
1091 free (name); /* Free 1st new malloc'd copy */
1092 name = absolute_name; /* Keep 2nd malloc'd copy in bfd */
1093 /* It'll be freed in free_objfile(). */
1095 sym_bfd = bfd_fdopenr (name, gnutarget, desc);
1099 make_cleanup (free, name);
1100 error ("\"%s\": can't open to read symbols: %s.", name,
1101 bfd_errmsg (bfd_get_error ()));
1103 sym_bfd->cacheable = true;
1105 if (!bfd_check_format (sym_bfd, bfd_object))
1107 /* FIXME: should be checking for errors from bfd_close (for one thing,
1108 on error it does not free all the storage associated with the
1110 bfd_close (sym_bfd); /* This also closes desc */
1111 make_cleanup (free, name);
1112 error ("\"%s\": can't read symbols: %s.", name,
1113 bfd_errmsg (bfd_get_error ()));
1118 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1119 startup by the _initialize routine in each object file format reader,
1120 to register information about each format the the reader is prepared
1127 sf->next = symtab_fns;
1132 /* Initialize to read symbols from the symbol file sym_bfd. It either
1133 returns or calls error(). The result is an initialized struct sym_fns
1134 in the objfile structure, that contains cached information about the
1138 find_sym_fns (objfile)
1139 struct objfile *objfile;
1142 enum bfd_flavour our_flavour = bfd_get_flavour (objfile->obfd);
1143 char *our_target = bfd_get_target (objfile->obfd);
1145 /* Special kludge for RS/6000 and PowerMac. See xcoffread.c. */
1146 if (STREQ (our_target, "aixcoff-rs6000") ||
1147 STREQ (our_target, "xcoff-powermac"))
1148 our_flavour = (enum bfd_flavour) -1;
1150 /* Special kludge for apollo. See dstread.c. */
1151 if (STREQN (our_target, "apollo", 6))
1152 our_flavour = (enum bfd_flavour) -2;
1154 for (sf = symtab_fns; sf != NULL; sf = sf->next)
1156 if (our_flavour == sf->sym_flavour)
1162 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
1163 bfd_get_target (objfile->obfd));
1166 /* This function runs the load command of our current target. */
1169 load_command (arg, from_tty)
1174 arg = get_exec_file (1);
1175 target_load (arg, from_tty);
1178 /* This version of "load" should be usable for any target. Currently
1179 it is just used for remote targets, not inftarg.c or core files,
1180 on the theory that only in that case is it useful.
1182 Avoiding xmodem and the like seems like a win (a) because we don't have
1183 to worry about finding it, and (b) On VMS, fork() is very slow and so
1184 we don't want to run a subprocess. On the other hand, I'm not sure how
1185 performance compares. */
1187 static int download_write_size = 512;
1188 static int validate_download = 0;
1191 generic_load (char *args, int from_tty)
1195 time_t start_time, end_time; /* Start and end times of download */
1196 unsigned long data_count = 0; /* Number of bytes transferred to memory */
1197 unsigned long write_count = 0; /* Number of writes needed. */
1198 unsigned long load_offset; /* offset to add to vma for each section */
1200 struct cleanup *old_cleanups;
1202 CORE_ADDR total_size = 0;
1203 CORE_ADDR total_sent = 0;
1205 /* Parse the input argument - the user can specify a load offset as
1206 a second argument. */
1207 filename = xmalloc (strlen (args) + 1);
1208 old_cleanups = make_cleanup (free, filename);
1209 strcpy (filename, args);
1210 offptr = strchr (filename, ' ');
1214 load_offset = strtoul (offptr, &endptr, 0);
1215 if (offptr == endptr)
1216 error ("Invalid download offset:%s\n", offptr);
1222 /* Open the file for loading. */
1223 loadfile_bfd = bfd_openr (filename, gnutarget);
1224 if (loadfile_bfd == NULL)
1226 perror_with_name (filename);
1230 /* FIXME: should be checking for errors from bfd_close (for one thing,
1231 on error it does not free all the storage associated with the
1233 make_cleanup_bfd_close (loadfile_bfd);
1235 if (!bfd_check_format (loadfile_bfd, bfd_object))
1237 error ("\"%s\" is not an object file: %s", filename,
1238 bfd_errmsg (bfd_get_error ()));
1241 for (s = loadfile_bfd->sections; s; s = s->next)
1242 if (s->flags & SEC_LOAD)
1243 total_size += bfd_get_section_size_before_reloc (s);
1245 start_time = time (NULL);
1247 for (s = loadfile_bfd->sections; s; s = s->next)
1249 if (s->flags & SEC_LOAD)
1251 CORE_ADDR size = bfd_get_section_size_before_reloc (s);
1255 struct cleanup *old_chain;
1256 CORE_ADDR lma = s->lma + load_offset;
1257 CORE_ADDR block_size;
1259 const char *sect_name = bfd_get_section_name (loadfile_bfd, s);
1262 if (download_write_size > 0 && size > download_write_size)
1263 block_size = download_write_size;
1267 buffer = xmalloc (size);
1268 old_chain = make_cleanup (free, buffer);
1270 /* Is this really necessary? I guess it gives the user something
1271 to look at during a long download. */
1273 ui_out_message (uiout, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1274 sect_name, paddr_nz (size), paddr_nz (lma));
1276 fprintf_unfiltered (gdb_stdout,
1277 "Loading section %s, size 0x%s lma 0x%s\n",
1278 sect_name, paddr_nz (size), paddr_nz (lma));
1281 bfd_get_section_contents (loadfile_bfd, s, buffer, 0, size);
1287 CORE_ADDR this_transfer = size - sent;
1288 if (this_transfer >= block_size)
1289 this_transfer = block_size;
1290 len = target_write_memory_partial (lma, buffer,
1291 this_transfer, &err);
1294 if (validate_download)
1296 /* Broken memories and broken monitors manifest
1297 themselves here when bring new computers to
1298 life. This doubles already slow downloads. */
1299 /* NOTE: cagney/1999-10-18: A more efficient
1300 implementation might add a verify_memory()
1301 method to the target vector and then use
1302 that. remote.c could implement that method
1303 using the ``qCRC'' packet. */
1304 char *check = xmalloc (len);
1305 struct cleanup *verify_cleanups = make_cleanup (free, check);
1306 if (target_read_memory (lma, check, len) != 0)
1307 error ("Download verify read failed at 0x%s",
1309 if (memcmp (buffer, check, len) != 0)
1310 error ("Download verify compare failed at 0x%s",
1312 do_cleanups (verify_cleanups);
1321 || (ui_load_progress_hook != NULL
1322 && ui_load_progress_hook (sect_name, sent)))
1323 error ("Canceled the download");
1325 if (show_load_progress != NULL)
1326 show_load_progress (sect_name, sent, size, total_sent, total_size);
1328 while (sent < size);
1331 error ("Memory access error while loading section %s.", sect_name);
1333 do_cleanups (old_chain);
1338 end_time = time (NULL);
1341 entry = bfd_get_start_address (loadfile_bfd);
1343 ui_out_text (uiout, "Start address ");
1344 ui_out_field_fmt (uiout, "address", "0x%s" , paddr_nz (entry));
1345 ui_out_text (uiout, ", load size ");
1346 ui_out_field_fmt (uiout, "load-size", "%ld" , data_count);
1347 ui_out_text (uiout, "\n");
1350 fprintf_unfiltered (gdb_stdout,
1351 "Start address 0x%s , load size %ld\n",
1352 paddr_nz (entry), data_count);
1354 /* We were doing this in remote-mips.c, I suspect it is right
1355 for other targets too. */
1359 /* FIXME: are we supposed to call symbol_file_add or not? According to
1360 a comment from remote-mips.c (where a call to symbol_file_add was
1361 commented out), making the call confuses GDB if more than one file is
1362 loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c
1365 print_transfer_performance (gdb_stdout, data_count, write_count,
1366 end_time - start_time);
1368 do_cleanups (old_cleanups);
1371 /* Report how fast the transfer went. */
1373 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1374 replaced by print_transfer_performance (with a very different
1375 function signature). */
1378 report_transfer_performance (data_count, start_time, end_time)
1379 unsigned long data_count;
1380 time_t start_time, end_time;
1382 print_transfer_performance (gdb_stdout, data_count, end_time - start_time, 0);
1386 print_transfer_performance (struct ui_file *stream,
1387 unsigned long data_count,
1388 unsigned long write_count,
1389 unsigned long time_count)
1392 ui_out_text (uiout, "Transfer rate: ");
1395 ui_out_field_fmt (uiout, "transfer-rate", "%ld",
1396 (data_count * 8) / time_count);
1397 ui_out_text (uiout, " bits/sec");
1401 ui_out_field_fmt (uiout, "transferred-bits", "%ld", (data_count * 8));
1402 ui_out_text (uiout, " bits in <1 sec");
1404 if (write_count > 0)
1406 ui_out_text (uiout, ", ");
1407 ui_out_field_fmt (uiout, "write-rate", "%ld", data_count / write_count);
1408 ui_out_text (uiout, " bytes/write");
1410 ui_out_text (uiout, ".\n");
1412 fprintf_unfiltered (stream, "Transfer rate: ");
1414 fprintf_unfiltered (stream, "%ld bits/sec", (data_count * 8) / time_count);
1416 fprintf_unfiltered (stream, "%ld bits in <1 sec", (data_count * 8));
1417 if (write_count > 0)
1418 fprintf_unfiltered (stream, ", %ld bytes/write", data_count / write_count);
1419 fprintf_unfiltered (stream, ".\n");
1423 /* This function allows the addition of incrementally linked object files.
1424 It does not modify any state in the target, only in the debugger. */
1425 /* Note: ezannoni 2000-04-13 This function/command used to have a
1426 special case syntax for the rombug target (Rombug is the boot
1427 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
1428 rombug case, the user doesn't need to supply a text address,
1429 instead a call to target_link() (in target.c) would supply the
1430 value to use. We are now discontinuing this type of ad hoc syntax. */
1434 add_symbol_file_command (args, from_tty)
1438 char *filename = NULL;
1439 int flags = OBJF_USERLOADED;
1441 int expecting_option = 0;
1442 int section_index = 0;
1446 int expecting_sec_name = 0;
1447 int expecting_sec_addr = 0;
1453 } sect_opts[SECT_OFF_MAX];
1455 struct section_addr_info section_addrs;
1456 struct cleanup *my_cleanups;
1461 error ("add-symbol-file takes a file name and an address");
1463 /* Make a copy of the string that we can safely write into. */
1464 args = xstrdup (args);
1466 /* Ensure section_addrs is initialized */
1467 memset (§ion_addrs, 0, sizeof (section_addrs));
1469 while (*args != '\000')
1471 /* Any leading spaces? */
1472 while (isspace (*args))
1475 /* Point arg to the beginning of the argument. */
1478 /* Move args pointer over the argument. */
1479 while ((*args != '\000') && !isspace (*args))
1482 /* If there are more arguments, terminate arg and
1484 if (*args != '\000')
1487 /* Now process the argument. */
1490 /* The first argument is the file name. */
1491 filename = tilde_expand (arg);
1492 my_cleanups = make_cleanup (free, filename);
1497 /* The second argument is always the text address at which
1498 to load the program. */
1499 sect_opts[section_index].name = ".text";
1500 sect_opts[section_index].value = arg;
1505 /* It's an option (starting with '-') or it's an argument
1510 if (strcmp (arg, "-mapped") == 0)
1511 flags |= OBJF_MAPPED;
1513 if (strcmp (arg, "-readnow") == 0)
1514 flags |= OBJF_READNOW;
1516 if (strcmp (arg, "-s") == 0)
1518 if (section_index >= SECT_OFF_MAX)
1519 error ("Too many sections specified.");
1520 expecting_sec_name = 1;
1521 expecting_sec_addr = 1;
1526 if (expecting_sec_name)
1528 sect_opts[section_index].name = arg;
1529 expecting_sec_name = 0;
1532 if (expecting_sec_addr)
1534 sect_opts[section_index].value = arg;
1535 expecting_sec_addr = 0;
1539 error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*");
1545 /* Print the prompt for the query below. And save the arguments into
1546 a sect_addr_info structure to be passed around to other
1547 functions. We have to split this up into separate print
1548 statements because local_hex_string returns a local static
1551 printf_filtered ("add symbol table from file \"%s\" at\n", filename);
1552 for (i = 0; i < section_index; i++)
1555 char *val = sect_opts[i].value;
1556 char *sec = sect_opts[i].name;
1558 val = sect_opts[i].value;
1559 if (val[0] == '0' && val[1] == 'x')
1560 addr = strtoul (val+2, NULL, 16);
1562 addr = strtoul (val, NULL, 10);
1564 /* Here we store the section offsets in the order they were
1565 entered on the command line. */
1566 section_addrs.other[sec_num].name = sec;
1567 section_addrs.other[sec_num].addr = addr;
1568 printf_filtered ("\t%s_addr = %s\n",
1570 local_hex_string ((unsigned long)addr));
1573 /* The object's sections are initialized when a
1574 call is made to build_objfile_section_table (objfile).
1575 This happens in reread_symbols.
1576 At this point, we don't know what file type this is,
1577 so we can't determine what section names are valid. */
1580 if (from_tty && (!query ("%s", "")))
1581 error ("Not confirmed.");
1583 symbol_file_add (filename, from_tty, §ion_addrs, 0, flags);
1585 /* Getting new symbols may change our opinion about what is
1587 reinit_frame_cache ();
1588 do_cleanups (my_cleanups);
1592 add_shared_symbol_files_command (args, from_tty)
1596 #ifdef ADD_SHARED_SYMBOL_FILES
1597 ADD_SHARED_SYMBOL_FILES (args, from_tty);
1599 error ("This command is not available in this configuration of GDB.");
1603 /* Re-read symbols if a symbol-file has changed. */
1607 struct objfile *objfile;
1610 struct stat new_statbuf;
1613 /* With the addition of shared libraries, this should be modified,
1614 the load time should be saved in the partial symbol tables, since
1615 different tables may come from different source files. FIXME.
1616 This routine should then walk down each partial symbol table
1617 and see if the symbol table that it originates from has been changed */
1619 for (objfile = object_files; objfile; objfile = objfile->next)
1623 #ifdef IBM6000_TARGET
1624 /* If this object is from a shared library, then you should
1625 stat on the library name, not member name. */
1627 if (objfile->obfd->my_archive)
1628 res = stat (objfile->obfd->my_archive->filename, &new_statbuf);
1631 res = stat (objfile->name, &new_statbuf);
1634 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1635 printf_filtered ("`%s' has disappeared; keeping its symbols.\n",
1639 new_modtime = new_statbuf.st_mtime;
1640 if (new_modtime != objfile->mtime)
1642 struct cleanup *old_cleanups;
1643 struct section_offsets *offsets;
1645 char *obfd_filename;
1647 printf_filtered ("`%s' has changed; re-reading symbols.\n",
1650 /* There are various functions like symbol_file_add,
1651 symfile_bfd_open, syms_from_objfile, etc., which might
1652 appear to do what we want. But they have various other
1653 effects which we *don't* want. So we just do stuff
1654 ourselves. We don't worry about mapped files (for one thing,
1655 any mapped file will be out of date). */
1657 /* If we get an error, blow away this objfile (not sure if
1658 that is the correct response for things like shared
1660 old_cleanups = make_cleanup ((make_cleanup_func) free_objfile,
1662 /* We need to do this whenever any symbols go away. */
1663 make_cleanup ((make_cleanup_func) clear_symtab_users, 0);
1665 /* Clean up any state BFD has sitting around. We don't need
1666 to close the descriptor but BFD lacks a way of closing the
1667 BFD without closing the descriptor. */
1668 obfd_filename = bfd_get_filename (objfile->obfd);
1669 if (!bfd_close (objfile->obfd))
1670 error ("Can't close BFD for %s: %s", objfile->name,
1671 bfd_errmsg (bfd_get_error ()));
1672 objfile->obfd = bfd_openr (obfd_filename, gnutarget);
1673 if (objfile->obfd == NULL)
1674 error ("Can't open %s to read symbols.", objfile->name);
1675 /* bfd_openr sets cacheable to true, which is what we want. */
1676 if (!bfd_check_format (objfile->obfd, bfd_object))
1677 error ("Can't read symbols from %s: %s.", objfile->name,
1678 bfd_errmsg (bfd_get_error ()));
1680 /* Save the offsets, we will nuke them with the rest of the
1682 num_offsets = objfile->num_sections;
1683 offsets = (struct section_offsets *) alloca (SIZEOF_SECTION_OFFSETS);
1684 memcpy (offsets, objfile->section_offsets, SIZEOF_SECTION_OFFSETS);
1686 /* Nuke all the state that we will re-read. Much of the following
1687 code which sets things to NULL really is necessary to tell
1688 other parts of GDB that there is nothing currently there. */
1690 /* FIXME: Do we have to free a whole linked list, or is this
1692 if (objfile->global_psymbols.list)
1693 mfree (objfile->md, objfile->global_psymbols.list);
1694 memset (&objfile->global_psymbols, 0,
1695 sizeof (objfile->global_psymbols));
1696 if (objfile->static_psymbols.list)
1697 mfree (objfile->md, objfile->static_psymbols.list);
1698 memset (&objfile->static_psymbols, 0,
1699 sizeof (objfile->static_psymbols));
1701 /* Free the obstacks for non-reusable objfiles */
1702 free_bcache (&objfile->psymbol_cache);
1703 obstack_free (&objfile->psymbol_obstack, 0);
1704 obstack_free (&objfile->symbol_obstack, 0);
1705 obstack_free (&objfile->type_obstack, 0);
1706 objfile->sections = NULL;
1707 objfile->symtabs = NULL;
1708 objfile->psymtabs = NULL;
1709 objfile->free_psymtabs = NULL;
1710 objfile->msymbols = NULL;
1711 objfile->minimal_symbol_count = 0;
1712 memset (&objfile->msymbol_hash, 0,
1713 sizeof (objfile->msymbol_hash));
1714 memset (&objfile->msymbol_demangled_hash, 0,
1715 sizeof (objfile->msymbol_demangled_hash));
1716 objfile->fundamental_types = NULL;
1717 if (objfile->sf != NULL)
1719 (*objfile->sf->sym_finish) (objfile);
1722 /* We never make this a mapped file. */
1724 /* obstack_specify_allocation also initializes the obstack so
1726 obstack_specify_allocation (&objfile->psymbol_cache.cache, 0, 0,
1728 obstack_specify_allocation (&objfile->psymbol_obstack, 0, 0,
1730 obstack_specify_allocation (&objfile->symbol_obstack, 0, 0,
1732 obstack_specify_allocation (&objfile->type_obstack, 0, 0,
1734 if (build_objfile_section_table (objfile))
1736 error ("Can't find the file sections in `%s': %s",
1737 objfile->name, bfd_errmsg (bfd_get_error ()));
1740 /* We use the same section offsets as from last time. I'm not
1741 sure whether that is always correct for shared libraries. */
1742 objfile->section_offsets = (struct section_offsets *)
1743 obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS);
1744 memcpy (objfile->section_offsets, offsets, SIZEOF_SECTION_OFFSETS);
1745 objfile->num_sections = num_offsets;
1747 /* What the hell is sym_new_init for, anyway? The concept of
1748 distinguishing between the main file and additional files
1749 in this way seems rather dubious. */
1750 if (objfile == symfile_objfile)
1752 (*objfile->sf->sym_new_init) (objfile);
1754 RESET_HP_UX_GLOBALS ();
1758 (*objfile->sf->sym_init) (objfile);
1759 clear_complaints (1, 1);
1760 /* The "mainline" parameter is a hideous hack; I think leaving it
1761 zero is OK since dbxread.c also does what it needs to do if
1762 objfile->global_psymbols.size is 0. */
1763 (*objfile->sf->sym_read) (objfile, 0);
1764 if (!have_partial_symbols () && !have_full_symbols ())
1767 printf_filtered ("(no debugging symbols found)\n");
1770 objfile->flags |= OBJF_SYMS;
1772 /* We're done reading the symbol file; finish off complaints. */
1773 clear_complaints (0, 1);
1775 /* Getting new symbols may change our opinion about what is
1778 reinit_frame_cache ();
1780 /* Discard cleanups as symbol reading was successful. */
1781 discard_cleanups (old_cleanups);
1783 /* If the mtime has changed between the time we set new_modtime
1784 and now, we *want* this to be out of date, so don't call stat
1786 objfile->mtime = new_modtime;
1789 /* Call this after reading in a new symbol table to give target
1790 dependant code a crack at the new symbols. For instance, this
1791 could be used to update the values of target-specific symbols GDB
1792 needs to keep track of (such as _sigtramp, or whatever). */
1794 TARGET_SYMFILE_POSTREAD (objfile);
1800 clear_symtab_users ();
1812 static filename_language *filename_language_table;
1813 static int fl_table_size, fl_table_next;
1816 add_filename_language (ext, lang)
1820 if (fl_table_next >= fl_table_size)
1822 fl_table_size += 10;
1823 filename_language_table = realloc (filename_language_table,
1827 filename_language_table[fl_table_next].ext = strsave (ext);
1828 filename_language_table[fl_table_next].lang = lang;
1832 static char *ext_args;
1835 set_ext_lang_command (args, from_tty)
1840 char *cp = ext_args;
1843 /* First arg is filename extension, starting with '.' */
1845 error ("'%s': Filename extension must begin with '.'", ext_args);
1847 /* Find end of first arg. */
1848 while (*cp && !isspace (*cp))
1852 error ("'%s': two arguments required -- filename extension and language",
1855 /* Null-terminate first arg */
1858 /* Find beginning of second arg, which should be a source language. */
1859 while (*cp && isspace (*cp))
1863 error ("'%s': two arguments required -- filename extension and language",
1866 /* Lookup the language from among those we know. */
1867 lang = language_enum (cp);
1869 /* Now lookup the filename extension: do we already know it? */
1870 for (i = 0; i < fl_table_next; i++)
1871 if (0 == strcmp (ext_args, filename_language_table[i].ext))
1874 if (i >= fl_table_next)
1876 /* new file extension */
1877 add_filename_language (ext_args, lang);
1881 /* redefining a previously known filename extension */
1884 /* query ("Really make files of type %s '%s'?", */
1885 /* ext_args, language_str (lang)); */
1887 free (filename_language_table[i].ext);
1888 filename_language_table[i].ext = strsave (ext_args);
1889 filename_language_table[i].lang = lang;
1894 info_ext_lang_command (args, from_tty)
1900 printf_filtered ("Filename extensions and the languages they represent:");
1901 printf_filtered ("\n\n");
1902 for (i = 0; i < fl_table_next; i++)
1903 printf_filtered ("\t%s\t- %s\n",
1904 filename_language_table[i].ext,
1905 language_str (filename_language_table[i].lang));
1909 init_filename_language_table ()
1911 if (fl_table_size == 0) /* protect against repetition */
1915 filename_language_table =
1916 xmalloc (fl_table_size * sizeof (*filename_language_table));
1917 add_filename_language (".c", language_c);
1918 add_filename_language (".C", language_cplus);
1919 add_filename_language (".cc", language_cplus);
1920 add_filename_language (".cp", language_cplus);
1921 add_filename_language (".cpp", language_cplus);
1922 add_filename_language (".cxx", language_cplus);
1923 add_filename_language (".c++", language_cplus);
1924 add_filename_language (".java", language_java);
1925 add_filename_language (".class", language_java);
1926 add_filename_language (".ch", language_chill);
1927 add_filename_language (".c186", language_chill);
1928 add_filename_language (".c286", language_chill);
1929 add_filename_language (".f", language_fortran);
1930 add_filename_language (".F", language_fortran);
1931 add_filename_language (".s", language_asm);
1932 add_filename_language (".S", language_asm);
1937 deduce_language_from_filename (filename)
1943 if (filename != NULL)
1944 if ((cp = strrchr (filename, '.')) != NULL)
1945 for (i = 0; i < fl_table_next; i++)
1946 if (strcmp (cp, filename_language_table[i].ext) == 0)
1947 return filename_language_table[i].lang;
1949 return language_unknown;
1954 Allocate and partly initialize a new symbol table. Return a pointer
1955 to it. error() if no space.
1957 Caller must set these fields:
1963 possibly free_named_symtabs (symtab->filename);
1967 allocate_symtab (filename, objfile)
1969 struct objfile *objfile;
1971 register struct symtab *symtab;
1973 symtab = (struct symtab *)
1974 obstack_alloc (&objfile->symbol_obstack, sizeof (struct symtab));
1975 memset (symtab, 0, sizeof (*symtab));
1976 symtab->filename = obsavestring (filename, strlen (filename),
1977 &objfile->symbol_obstack);
1978 symtab->fullname = NULL;
1979 symtab->language = deduce_language_from_filename (filename);
1980 symtab->debugformat = obsavestring ("unknown", 7,
1981 &objfile->symbol_obstack);
1983 /* Hook it to the objfile it comes from */
1985 symtab->objfile = objfile;
1986 symtab->next = objfile->symtabs;
1987 objfile->symtabs = symtab;
1989 /* FIXME: This should go away. It is only defined for the Z8000,
1990 and the Z8000 definition of this macro doesn't have anything to
1991 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
1992 here for convenience. */
1993 #ifdef INIT_EXTRA_SYMTAB_INFO
1994 INIT_EXTRA_SYMTAB_INFO (symtab);
2000 struct partial_symtab *
2001 allocate_psymtab (filename, objfile)
2003 struct objfile *objfile;
2005 struct partial_symtab *psymtab;
2007 if (objfile->free_psymtabs)
2009 psymtab = objfile->free_psymtabs;
2010 objfile->free_psymtabs = psymtab->next;
2013 psymtab = (struct partial_symtab *)
2014 obstack_alloc (&objfile->psymbol_obstack,
2015 sizeof (struct partial_symtab));
2017 memset (psymtab, 0, sizeof (struct partial_symtab));
2018 psymtab->filename = obsavestring (filename, strlen (filename),
2019 &objfile->psymbol_obstack);
2020 psymtab->symtab = NULL;
2022 /* Prepend it to the psymtab list for the objfile it belongs to.
2023 Psymtabs are searched in most recent inserted -> least recent
2026 psymtab->objfile = objfile;
2027 psymtab->next = objfile->psymtabs;
2028 objfile->psymtabs = psymtab;
2031 struct partial_symtab **prev_pst;
2032 psymtab->objfile = objfile;
2033 psymtab->next = NULL;
2034 prev_pst = &(objfile->psymtabs);
2035 while ((*prev_pst) != NULL)
2036 prev_pst = &((*prev_pst)->next);
2037 (*prev_pst) = psymtab;
2045 discard_psymtab (pst)
2046 struct partial_symtab *pst;
2048 struct partial_symtab **prev_pst;
2051 Empty psymtabs happen as a result of header files which don't
2052 have any symbols in them. There can be a lot of them. But this
2053 check is wrong, in that a psymtab with N_SLINE entries but
2054 nothing else is not empty, but we don't realize that. Fixing
2055 that without slowing things down might be tricky. */
2057 /* First, snip it out of the psymtab chain */
2059 prev_pst = &(pst->objfile->psymtabs);
2060 while ((*prev_pst) != pst)
2061 prev_pst = &((*prev_pst)->next);
2062 (*prev_pst) = pst->next;
2064 /* Next, put it on a free list for recycling */
2066 pst->next = pst->objfile->free_psymtabs;
2067 pst->objfile->free_psymtabs = pst;
2071 /* Reset all data structures in gdb which may contain references to symbol
2075 clear_symtab_users ()
2077 /* Someday, we should do better than this, by only blowing away
2078 the things that really need to be blown. */
2079 clear_value_history ();
2081 clear_internalvars ();
2082 breakpoint_re_set ();
2083 set_default_breakpoint (0, 0, 0, 0);
2084 current_source_symtab = 0;
2085 current_source_line = 0;
2086 clear_pc_function_cache ();
2087 if (target_new_objfile_hook)
2088 target_new_objfile_hook (NULL);
2091 /* clear_symtab_users_once:
2093 This function is run after symbol reading, or from a cleanup.
2094 If an old symbol table was obsoleted, the old symbol table
2095 has been blown away, but the other GDB data structures that may
2096 reference it have not yet been cleared or re-directed. (The old
2097 symtab was zapped, and the cleanup queued, in free_named_symtab()
2100 This function can be queued N times as a cleanup, or called
2101 directly; it will do all the work the first time, and then will be a
2102 no-op until the next time it is queued. This works by bumping a
2103 counter at queueing time. Much later when the cleanup is run, or at
2104 the end of symbol processing (in case the cleanup is discarded), if
2105 the queued count is greater than the "done-count", we do the work
2106 and set the done-count to the queued count. If the queued count is
2107 less than or equal to the done-count, we just ignore the call. This
2108 is needed because reading a single .o file will often replace many
2109 symtabs (one per .h file, for example), and we don't want to reset
2110 the breakpoints N times in the user's face.
2112 The reason we both queue a cleanup, and call it directly after symbol
2113 reading, is because the cleanup protects us in case of errors, but is
2114 discarded if symbol reading is successful. */
2117 /* FIXME: As free_named_symtabs is currently a big noop this function
2118 is no longer needed. */
2120 clear_symtab_users_once PARAMS ((void));
2122 static int clear_symtab_users_queued;
2123 static int clear_symtab_users_done;
2126 clear_symtab_users_once ()
2128 /* Enforce once-per-`do_cleanups'-semantics */
2129 if (clear_symtab_users_queued <= clear_symtab_users_done)
2131 clear_symtab_users_done = clear_symtab_users_queued;
2133 clear_symtab_users ();
2137 /* Delete the specified psymtab, and any others that reference it. */
2140 cashier_psymtab (pst)
2141 struct partial_symtab *pst;
2143 struct partial_symtab *ps, *pprev = NULL;
2146 /* Find its previous psymtab in the chain */
2147 for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
2156 /* Unhook it from the chain. */
2157 if (ps == pst->objfile->psymtabs)
2158 pst->objfile->psymtabs = ps->next;
2160 pprev->next = ps->next;
2162 /* FIXME, we can't conveniently deallocate the entries in the
2163 partial_symbol lists (global_psymbols/static_psymbols) that
2164 this psymtab points to. These just take up space until all
2165 the psymtabs are reclaimed. Ditto the dependencies list and
2166 filename, which are all in the psymbol_obstack. */
2168 /* We need to cashier any psymtab that has this one as a dependency... */
2170 for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
2172 for (i = 0; i < ps->number_of_dependencies; i++)
2174 if (ps->dependencies[i] == pst)
2176 cashier_psymtab (ps);
2177 goto again; /* Must restart, chain has been munged. */
2184 /* If a symtab or psymtab for filename NAME is found, free it along
2185 with any dependent breakpoints, displays, etc.
2186 Used when loading new versions of object modules with the "add-file"
2187 command. This is only called on the top-level symtab or psymtab's name;
2188 it is not called for subsidiary files such as .h files.
2190 Return value is 1 if we blew away the environment, 0 if not.
2191 FIXME. The return valu appears to never be used.
2193 FIXME. I think this is not the best way to do this. We should
2194 work on being gentler to the environment while still cleaning up
2195 all stray pointers into the freed symtab. */
2198 free_named_symtabs (name)
2202 /* FIXME: With the new method of each objfile having it's own
2203 psymtab list, this function needs serious rethinking. In particular,
2204 why was it ever necessary to toss psymtabs with specific compilation
2205 unit filenames, as opposed to all psymtabs from a particular symbol
2207 Well, the answer is that some systems permit reloading of particular
2208 compilation units. We want to blow away any old info about these
2209 compilation units, regardless of which objfiles they arrived in. --gnu. */
2211 register struct symtab *s;
2212 register struct symtab *prev;
2213 register struct partial_symtab *ps;
2214 struct blockvector *bv;
2217 /* We only wack things if the symbol-reload switch is set. */
2218 if (!symbol_reloading)
2221 /* Some symbol formats have trouble providing file names... */
2222 if (name == 0 || *name == '\0')
2225 /* Look for a psymtab with the specified name. */
2228 for (ps = partial_symtab_list; ps; ps = ps->next)
2230 if (STREQ (name, ps->filename))
2232 cashier_psymtab (ps); /* Blow it away...and its little dog, too. */
2233 goto again2; /* Must restart, chain has been munged */
2237 /* Look for a symtab with the specified name. */
2239 for (s = symtab_list; s; s = s->next)
2241 if (STREQ (name, s->filename))
2248 if (s == symtab_list)
2249 symtab_list = s->next;
2251 prev->next = s->next;
2253 /* For now, queue a delete for all breakpoints, displays, etc., whether
2254 or not they depend on the symtab being freed. This should be
2255 changed so that only those data structures affected are deleted. */
2257 /* But don't delete anything if the symtab is empty.
2258 This test is necessary due to a bug in "dbxread.c" that
2259 causes empty symtabs to be created for N_SO symbols that
2260 contain the pathname of the object file. (This problem
2261 has been fixed in GDB 3.9x). */
2263 bv = BLOCKVECTOR (s);
2264 if (BLOCKVECTOR_NBLOCKS (bv) > 2
2265 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK))
2266 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)))
2268 complain (&oldsyms_complaint, name);
2270 clear_symtab_users_queued++;
2271 make_cleanup (clear_symtab_users_once, 0);
2276 complain (&empty_symtab_complaint, name);
2283 /* It is still possible that some breakpoints will be affected
2284 even though no symtab was found, since the file might have
2285 been compiled without debugging, and hence not be associated
2286 with a symtab. In order to handle this correctly, we would need
2287 to keep a list of text address ranges for undebuggable files.
2288 For now, we do nothing, since this is a fairly obscure case. */
2292 /* FIXME, what about the minimal symbol table? */
2299 /* Allocate and partially fill a partial symtab. It will be
2300 completely filled at the end of the symbol list.
2302 FILENAME is the name of the symbol-file we are reading from. */
2304 struct partial_symtab *
2305 start_psymtab_common (objfile, section_offsets,
2306 filename, textlow, global_syms, static_syms)
2307 struct objfile *objfile;
2308 struct section_offsets *section_offsets;
2311 struct partial_symbol **global_syms;
2312 struct partial_symbol **static_syms;
2314 struct partial_symtab *psymtab;
2316 psymtab = allocate_psymtab (filename, objfile);
2317 psymtab->section_offsets = section_offsets;
2318 psymtab->textlow = textlow;
2319 psymtab->texthigh = psymtab->textlow; /* default */
2320 psymtab->globals_offset = global_syms - objfile->global_psymbols.list;
2321 psymtab->statics_offset = static_syms - objfile->static_psymbols.list;
2325 /* Add a symbol with a long value to a psymtab.
2326 Since one arg is a struct, we pass in a ptr and deref it (sigh). */
2329 add_psymbol_to_list (name, namelength, namespace, class, list, val, coreaddr,
2333 namespace_enum namespace;
2334 enum address_class class;
2335 struct psymbol_allocation_list *list;
2336 long val; /* Value as a long */
2337 CORE_ADDR coreaddr; /* Value as a CORE_ADDR */
2338 enum language language;
2339 struct objfile *objfile;
2341 register struct partial_symbol *psym;
2342 char *buf = alloca (namelength + 1);
2343 /* psymbol is static so that there will be no uninitialized gaps in the
2344 structure which might contain random data, causing cache misses in
2346 static struct partial_symbol psymbol;
2348 /* Create local copy of the partial symbol */
2349 memcpy (buf, name, namelength);
2350 buf[namelength] = '\0';
2351 SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, &objfile->psymbol_cache);
2352 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2355 SYMBOL_VALUE (&psymbol) = val;
2359 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
2361 SYMBOL_SECTION (&psymbol) = 0;
2362 SYMBOL_LANGUAGE (&psymbol) = language;
2363 PSYMBOL_NAMESPACE (&psymbol) = namespace;
2364 PSYMBOL_CLASS (&psymbol) = class;
2365 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language);
2367 /* Stash the partial symbol away in the cache */
2368 psym = bcache (&psymbol, sizeof (struct partial_symbol), &objfile->psymbol_cache);
2370 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2371 if (list->next >= list->list + list->size)
2373 extend_psymbol_list (list, objfile);
2375 *list->next++ = psym;
2376 OBJSTAT (objfile, n_psyms++);
2379 /* Add a symbol with a long value to a psymtab. This differs from
2380 * add_psymbol_to_list above in taking both a mangled and a demangled
2384 add_psymbol_with_dem_name_to_list (name, namelength, dem_name, dem_namelength,
2385 namespace, class, list, val, coreaddr, language, objfile)
2390 namespace_enum namespace;
2391 enum address_class class;
2392 struct psymbol_allocation_list *list;
2393 long val; /* Value as a long */
2394 CORE_ADDR coreaddr; /* Value as a CORE_ADDR */
2395 enum language language;
2396 struct objfile *objfile;
2398 register struct partial_symbol *psym;
2399 char *buf = alloca (namelength + 1);
2400 /* psymbol is static so that there will be no uninitialized gaps in the
2401 structure which might contain random data, causing cache misses in
2403 static struct partial_symbol psymbol;
2405 /* Create local copy of the partial symbol */
2407 memcpy (buf, name, namelength);
2408 buf[namelength] = '\0';
2409 SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, &objfile->psymbol_cache);
2411 buf = alloca (dem_namelength + 1);
2412 memcpy (buf, dem_name, dem_namelength);
2413 buf[dem_namelength] = '\0';
2418 case language_cplus:
2419 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol) =
2420 bcache (buf, dem_namelength + 1, &objfile->psymbol_cache);
2422 case language_chill:
2423 SYMBOL_CHILL_DEMANGLED_NAME (&psymbol) =
2424 bcache (buf, dem_namelength + 1, &objfile->psymbol_cache);
2426 /* FIXME What should be done for the default case? Ignoring for now. */
2429 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2432 SYMBOL_VALUE (&psymbol) = val;
2436 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
2438 SYMBOL_SECTION (&psymbol) = 0;
2439 SYMBOL_LANGUAGE (&psymbol) = language;
2440 PSYMBOL_NAMESPACE (&psymbol) = namespace;
2441 PSYMBOL_CLASS (&psymbol) = class;
2442 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language);
2444 /* Stash the partial symbol away in the cache */
2445 psym = bcache (&psymbol, sizeof (struct partial_symbol), &objfile->psymbol_cache);
2447 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2448 if (list->next >= list->list + list->size)
2450 extend_psymbol_list (list, objfile);
2452 *list->next++ = psym;
2453 OBJSTAT (objfile, n_psyms++);
2456 /* Initialize storage for partial symbols. */
2459 init_psymbol_list (objfile, total_symbols)
2460 struct objfile *objfile;
2463 /* Free any previously allocated psymbol lists. */
2465 if (objfile->global_psymbols.list)
2467 mfree (objfile->md, (PTR) objfile->global_psymbols.list);
2469 if (objfile->static_psymbols.list)
2471 mfree (objfile->md, (PTR) objfile->static_psymbols.list);
2474 /* Current best guess is that approximately a twentieth
2475 of the total symbols (in a debugging file) are global or static
2478 objfile->global_psymbols.size = total_symbols / 10;
2479 objfile->static_psymbols.size = total_symbols / 10;
2481 if (objfile->global_psymbols.size > 0)
2483 objfile->global_psymbols.next =
2484 objfile->global_psymbols.list = (struct partial_symbol **)
2485 xmmalloc (objfile->md, (objfile->global_psymbols.size
2486 * sizeof (struct partial_symbol *)));
2488 if (objfile->static_psymbols.size > 0)
2490 objfile->static_psymbols.next =
2491 objfile->static_psymbols.list = (struct partial_symbol **)
2492 xmmalloc (objfile->md, (objfile->static_psymbols.size
2493 * sizeof (struct partial_symbol *)));
2498 The following code implements an abstraction for debugging overlay sections.
2500 The target model is as follows:
2501 1) The gnu linker will permit multiple sections to be mapped into the
2502 same VMA, each with its own unique LMA (or load address).
2503 2) It is assumed that some runtime mechanism exists for mapping the
2504 sections, one by one, from the load address into the VMA address.
2505 3) This code provides a mechanism for gdb to keep track of which
2506 sections should be considered to be mapped from the VMA to the LMA.
2507 This information is used for symbol lookup, and memory read/write.
2508 For instance, if a section has been mapped then its contents
2509 should be read from the VMA, otherwise from the LMA.
2511 Two levels of debugger support for overlays are available. One is
2512 "manual", in which the debugger relies on the user to tell it which
2513 overlays are currently mapped. This level of support is
2514 implemented entirely in the core debugger, and the information about
2515 whether a section is mapped is kept in the objfile->obj_section table.
2517 The second level of support is "automatic", and is only available if
2518 the target-specific code provides functionality to read the target's
2519 overlay mapping table, and translate its contents for the debugger
2520 (by updating the mapped state information in the obj_section tables).
2522 The interface is as follows:
2524 overlay map <name> -- tell gdb to consider this section mapped
2525 overlay unmap <name> -- tell gdb to consider this section unmapped
2526 overlay list -- list the sections that GDB thinks are mapped
2527 overlay read-target -- get the target's state of what's mapped
2528 overlay off/manual/auto -- set overlay debugging state
2529 Functional interface:
2530 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2531 section, return that section.
2532 find_pc_overlay(pc): find any overlay section that contains
2533 the pc, either in its VMA or its LMA
2534 overlay_is_mapped(sect): true if overlay is marked as mapped
2535 section_is_overlay(sect): true if section's VMA != LMA
2536 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2537 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2538 overlay_mapped_address(...): map an address from section's LMA to VMA
2539 overlay_unmapped_address(...): map an address from section's VMA to LMA
2540 symbol_overlayed_address(...): Return a "current" address for symbol:
2541 either in VMA or LMA depending on whether
2542 the symbol's section is currently mapped
2545 /* Overlay debugging state: */
2547 int overlay_debugging = 0; /* 0 == off, 1 == manual, -1 == auto */
2548 int overlay_cache_invalid = 0; /* True if need to refresh mapped state */
2550 /* Target vector for refreshing overlay mapped state */
2551 static void simple_overlay_update PARAMS ((struct obj_section *));
2552 void (*target_overlay_update) PARAMS ((struct obj_section *))
2553 = simple_overlay_update;
2555 /* Function: section_is_overlay (SECTION)
2556 Returns true if SECTION has VMA not equal to LMA, ie.
2557 SECTION is loaded at an address different from where it will "run". */
2560 section_is_overlay (section)
2563 if (overlay_debugging)
2564 if (section && section->lma != 0 &&
2565 section->vma != section->lma)
2571 /* Function: overlay_invalidate_all (void)
2572 Invalidate the mapped state of all overlay sections (mark it as stale). */
2575 overlay_invalidate_all ()
2577 struct objfile *objfile;
2578 struct obj_section *sect;
2580 ALL_OBJSECTIONS (objfile, sect)
2581 if (section_is_overlay (sect->the_bfd_section))
2582 sect->ovly_mapped = -1;
2585 /* Function: overlay_is_mapped (SECTION)
2586 Returns true if section is an overlay, and is currently mapped.
2587 Private: public access is thru function section_is_mapped.
2589 Access to the ovly_mapped flag is restricted to this function, so
2590 that we can do automatic update. If the global flag
2591 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2592 overlay_invalidate_all. If the mapped state of the particular
2593 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2596 overlay_is_mapped (osect)
2597 struct obj_section *osect;
2599 if (osect == 0 || !section_is_overlay (osect->the_bfd_section))
2602 switch (overlay_debugging)
2606 return 0; /* overlay debugging off */
2607 case -1: /* overlay debugging automatic */
2608 /* Unles there is a target_overlay_update function,
2609 there's really nothing useful to do here (can't really go auto) */
2610 if (target_overlay_update)
2612 if (overlay_cache_invalid)
2614 overlay_invalidate_all ();
2615 overlay_cache_invalid = 0;
2617 if (osect->ovly_mapped == -1)
2618 (*target_overlay_update) (osect);
2620 /* fall thru to manual case */
2621 case 1: /* overlay debugging manual */
2622 return osect->ovly_mapped == 1;
2626 /* Function: section_is_mapped
2627 Returns true if section is an overlay, and is currently mapped. */
2630 section_is_mapped (section)
2633 struct objfile *objfile;
2634 struct obj_section *osect;
2636 if (overlay_debugging)
2637 if (section && section_is_overlay (section))
2638 ALL_OBJSECTIONS (objfile, osect)
2639 if (osect->the_bfd_section == section)
2640 return overlay_is_mapped (osect);
2645 /* Function: pc_in_unmapped_range
2646 If PC falls into the lma range of SECTION, return true, else false. */
2649 pc_in_unmapped_range (pc, section)
2655 if (overlay_debugging)
2656 if (section && section_is_overlay (section))
2658 size = bfd_get_section_size_before_reloc (section);
2659 if (section->lma <= pc && pc < section->lma + size)
2665 /* Function: pc_in_mapped_range
2666 If PC falls into the vma range of SECTION, return true, else false. */
2669 pc_in_mapped_range (pc, section)
2675 if (overlay_debugging)
2676 if (section && section_is_overlay (section))
2678 size = bfd_get_section_size_before_reloc (section);
2679 if (section->vma <= pc && pc < section->vma + size)
2685 /* Function: overlay_unmapped_address (PC, SECTION)
2686 Returns the address corresponding to PC in the unmapped (load) range.
2687 May be the same as PC. */
2690 overlay_unmapped_address (pc, section)
2694 if (overlay_debugging)
2695 if (section && section_is_overlay (section) &&
2696 pc_in_mapped_range (pc, section))
2697 return pc + section->lma - section->vma;
2702 /* Function: overlay_mapped_address (PC, SECTION)
2703 Returns the address corresponding to PC in the mapped (runtime) range.
2704 May be the same as PC. */
2707 overlay_mapped_address (pc, section)
2711 if (overlay_debugging)
2712 if (section && section_is_overlay (section) &&
2713 pc_in_unmapped_range (pc, section))
2714 return pc + section->vma - section->lma;
2720 /* Function: symbol_overlayed_address
2721 Return one of two addresses (relative to the VMA or to the LMA),
2722 depending on whether the section is mapped or not. */
2725 symbol_overlayed_address (address, section)
2729 if (overlay_debugging)
2731 /* If the symbol has no section, just return its regular address. */
2734 /* If the symbol's section is not an overlay, just return its address */
2735 if (!section_is_overlay (section))
2737 /* If the symbol's section is mapped, just return its address */
2738 if (section_is_mapped (section))
2741 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
2742 * then return its LOADED address rather than its vma address!!
2744 return overlay_unmapped_address (address, section);
2749 /* Function: find_pc_overlay (PC)
2750 Return the best-match overlay section for PC:
2751 If PC matches a mapped overlay section's VMA, return that section.
2752 Else if PC matches an unmapped section's VMA, return that section.
2753 Else if PC matches an unmapped section's LMA, return that section. */
2756 find_pc_overlay (pc)
2759 struct objfile *objfile;
2760 struct obj_section *osect, *best_match = NULL;
2762 if (overlay_debugging)
2763 ALL_OBJSECTIONS (objfile, osect)
2764 if (section_is_overlay (osect->the_bfd_section))
2766 if (pc_in_mapped_range (pc, osect->the_bfd_section))
2768 if (overlay_is_mapped (osect))
2769 return osect->the_bfd_section;
2773 else if (pc_in_unmapped_range (pc, osect->the_bfd_section))
2776 return best_match ? best_match->the_bfd_section : NULL;
2779 /* Function: find_pc_mapped_section (PC)
2780 If PC falls into the VMA address range of an overlay section that is
2781 currently marked as MAPPED, return that section. Else return NULL. */
2784 find_pc_mapped_section (pc)
2787 struct objfile *objfile;
2788 struct obj_section *osect;
2790 if (overlay_debugging)
2791 ALL_OBJSECTIONS (objfile, osect)
2792 if (pc_in_mapped_range (pc, osect->the_bfd_section) &&
2793 overlay_is_mapped (osect))
2794 return osect->the_bfd_section;
2799 /* Function: list_overlays_command
2800 Print a list of mapped sections and their PC ranges */
2803 list_overlays_command (args, from_tty)
2808 struct objfile *objfile;
2809 struct obj_section *osect;
2811 if (overlay_debugging)
2812 ALL_OBJSECTIONS (objfile, osect)
2813 if (overlay_is_mapped (osect))
2819 vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section);
2820 lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section);
2821 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
2822 name = bfd_section_name (objfile->obfd, osect->the_bfd_section);
2824 printf_filtered ("Section %s, loaded at ", name);
2825 print_address_numeric (lma, 1, gdb_stdout);
2826 puts_filtered (" - ");
2827 print_address_numeric (lma + size, 1, gdb_stdout);
2828 printf_filtered (", mapped at ");
2829 print_address_numeric (vma, 1, gdb_stdout);
2830 puts_filtered (" - ");
2831 print_address_numeric (vma + size, 1, gdb_stdout);
2832 puts_filtered ("\n");
2837 printf_filtered ("No sections are mapped.\n");
2840 /* Function: map_overlay_command
2841 Mark the named section as mapped (ie. residing at its VMA address). */
2844 map_overlay_command (args, from_tty)
2848 struct objfile *objfile, *objfile2;
2849 struct obj_section *sec, *sec2;
2852 if (!overlay_debugging)
2854 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
2855 the 'overlay manual' command.");
2857 if (args == 0 || *args == 0)
2858 error ("Argument required: name of an overlay section");
2860 /* First, find a section matching the user supplied argument */
2861 ALL_OBJSECTIONS (objfile, sec)
2862 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
2864 /* Now, check to see if the section is an overlay. */
2865 bfdsec = sec->the_bfd_section;
2866 if (!section_is_overlay (bfdsec))
2867 continue; /* not an overlay section */
2869 /* Mark the overlay as "mapped" */
2870 sec->ovly_mapped = 1;
2872 /* Next, make a pass and unmap any sections that are
2873 overlapped by this new section: */
2874 ALL_OBJSECTIONS (objfile2, sec2)
2875 if (sec2->ovly_mapped &&
2877 sec->the_bfd_section != sec2->the_bfd_section &&
2878 (pc_in_mapped_range (sec2->addr, sec->the_bfd_section) ||
2879 pc_in_mapped_range (sec2->endaddr, sec->the_bfd_section)))
2882 printf_filtered ("Note: section %s unmapped by overlap\n",
2883 bfd_section_name (objfile->obfd,
2884 sec2->the_bfd_section));
2885 sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2 */
2889 error ("No overlay section called %s", args);
2892 /* Function: unmap_overlay_command
2893 Mark the overlay section as unmapped
2894 (ie. resident in its LMA address range, rather than the VMA range). */
2897 unmap_overlay_command (args, from_tty)
2901 struct objfile *objfile;
2902 struct obj_section *sec;
2904 if (!overlay_debugging)
2906 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
2907 the 'overlay manual' command.");
2909 if (args == 0 || *args == 0)
2910 error ("Argument required: name of an overlay section");
2912 /* First, find a section matching the user supplied argument */
2913 ALL_OBJSECTIONS (objfile, sec)
2914 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
2916 if (!sec->ovly_mapped)
2917 error ("Section %s is not mapped", args);
2918 sec->ovly_mapped = 0;
2921 error ("No overlay section called %s", args);
2924 /* Function: overlay_auto_command
2925 A utility command to turn on overlay debugging.
2926 Possibly this should be done via a set/show command. */
2929 overlay_auto_command (args, from_tty)
2933 overlay_debugging = -1;
2935 printf_filtered ("Automatic overlay debugging enabled.");
2938 /* Function: overlay_manual_command
2939 A utility command to turn on overlay debugging.
2940 Possibly this should be done via a set/show command. */
2943 overlay_manual_command (args, from_tty)
2947 overlay_debugging = 1;
2949 printf_filtered ("Overlay debugging enabled.");
2952 /* Function: overlay_off_command
2953 A utility command to turn on overlay debugging.
2954 Possibly this should be done via a set/show command. */
2957 overlay_off_command (args, from_tty)
2961 overlay_debugging = 0;
2963 printf_filtered ("Overlay debugging disabled.");
2967 overlay_load_command (args, from_tty)
2971 if (target_overlay_update)
2972 (*target_overlay_update) (NULL);
2974 error ("This target does not know how to read its overlay state.");
2977 /* Function: overlay_command
2978 A place-holder for a mis-typed command */
2980 /* Command list chain containing all defined "overlay" subcommands. */
2981 struct cmd_list_element *overlaylist;
2984 overlay_command (args, from_tty)
2989 ("\"overlay\" must be followed by the name of an overlay command.\n");
2990 help_list (overlaylist, "overlay ", -1, gdb_stdout);
2994 /* Target Overlays for the "Simplest" overlay manager:
2996 This is GDB's default target overlay layer. It works with the
2997 minimal overlay manager supplied as an example by Cygnus. The
2998 entry point is via a function pointer "target_overlay_update",
2999 so targets that use a different runtime overlay manager can
3000 substitute their own overlay_update function and take over the
3003 The overlay_update function pokes around in the target's data structures
3004 to see what overlays are mapped, and updates GDB's overlay mapping with
3007 In this simple implementation, the target data structures are as follows:
3008 unsigned _novlys; /# number of overlay sections #/
3009 unsigned _ovly_table[_novlys][4] = {
3010 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3011 {..., ..., ..., ...},
3013 unsigned _novly_regions; /# number of overlay regions #/
3014 unsigned _ovly_region_table[_novly_regions][3] = {
3015 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3018 These functions will attempt to update GDB's mappedness state in the
3019 symbol section table, based on the target's mappedness state.
3021 To do this, we keep a cached copy of the target's _ovly_table, and
3022 attempt to detect when the cached copy is invalidated. The main
3023 entry point is "simple_overlay_update(SECT), which looks up SECT in
3024 the cached table and re-reads only the entry for that section from
3025 the target (whenever possible).
3028 /* Cached, dynamically allocated copies of the target data structures: */
3029 static unsigned (*cache_ovly_table)[4] = 0;
3031 static unsigned (*cache_ovly_region_table)[3] = 0;
3033 static unsigned cache_novlys = 0;
3035 static unsigned cache_novly_regions = 0;
3037 static CORE_ADDR cache_ovly_table_base = 0;
3039 static CORE_ADDR cache_ovly_region_table_base = 0;
3043 VMA, SIZE, LMA, MAPPED
3045 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
3047 /* Throw away the cached copy of _ovly_table */
3049 simple_free_overlay_table ()
3051 if (cache_ovly_table)
3052 free (cache_ovly_table);
3054 cache_ovly_table = NULL;
3055 cache_ovly_table_base = 0;
3059 /* Throw away the cached copy of _ovly_region_table */
3061 simple_free_overlay_region_table ()
3063 if (cache_ovly_region_table)
3064 free (cache_ovly_region_table);
3065 cache_novly_regions = 0;
3066 cache_ovly_region_table = NULL;
3067 cache_ovly_region_table_base = 0;
3071 /* Read an array of ints from the target into a local buffer.
3072 Convert to host order. int LEN is number of ints */
3074 read_target_long_array (memaddr, myaddr, len)
3076 unsigned int *myaddr;
3079 char *buf = alloca (len * TARGET_LONG_BYTES);
3082 read_memory (memaddr, buf, len * TARGET_LONG_BYTES);
3083 for (i = 0; i < len; i++)
3084 myaddr[i] = extract_unsigned_integer (TARGET_LONG_BYTES * i + buf,
3088 /* Find and grab a copy of the target _ovly_table
3089 (and _novlys, which is needed for the table's size) */
3091 simple_read_overlay_table ()
3093 struct minimal_symbol *msym;
3095 simple_free_overlay_table ();
3096 msym = lookup_minimal_symbol ("_novlys", 0, 0);
3098 cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4);
3100 return 0; /* failure */
3101 cache_ovly_table = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table));
3102 if (cache_ovly_table != NULL)
3104 msym = lookup_minimal_symbol ("_ovly_table", 0, 0);
3107 cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (msym);
3108 read_target_long_array (cache_ovly_table_base,
3109 (int *) cache_ovly_table,
3113 return 0; /* failure */
3116 return 0; /* failure */
3117 return 1; /* SUCCESS */
3121 /* Find and grab a copy of the target _ovly_region_table
3122 (and _novly_regions, which is needed for the table's size) */
3124 simple_read_overlay_region_table ()
3126 struct minimal_symbol *msym;
3128 simple_free_overlay_region_table ();
3129 msym = lookup_minimal_symbol ("_novly_regions", 0, 0);
3131 cache_novly_regions = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4);
3133 return 0; /* failure */
3134 cache_ovly_region_table = (void *) xmalloc (cache_novly_regions * 12);
3135 if (cache_ovly_region_table != NULL)
3137 msym = lookup_minimal_symbol ("_ovly_region_table", 0, 0);
3140 cache_ovly_region_table_base = SYMBOL_VALUE_ADDRESS (msym);
3141 read_target_long_array (cache_ovly_region_table_base,
3142 (int *) cache_ovly_region_table,
3143 cache_novly_regions * 3);
3146 return 0; /* failure */
3149 return 0; /* failure */
3150 return 1; /* SUCCESS */
3154 /* Function: simple_overlay_update_1
3155 A helper function for simple_overlay_update. Assuming a cached copy
3156 of _ovly_table exists, look through it to find an entry whose vma,
3157 lma and size match those of OSECT. Re-read the entry and make sure
3158 it still matches OSECT (else the table may no longer be valid).
3159 Set OSECT's mapped state to match the entry. Return: 1 for
3160 success, 0 for failure. */
3163 simple_overlay_update_1 (osect)
3164 struct obj_section *osect;
3168 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
3169 for (i = 0; i < cache_novlys; i++)
3170 if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma &&
3171 cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* &&
3172 cache_ovly_table[i][SIZE] == size */ )
3174 read_target_long_array (cache_ovly_table_base + i * TARGET_LONG_BYTES,
3175 (int *) cache_ovly_table[i], 4);
3176 if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma &&
3177 cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* &&
3178 cache_ovly_table[i][SIZE] == size */ )
3180 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3183 else /* Warning! Warning! Target's ovly table has changed! */
3189 /* Function: simple_overlay_update
3190 If OSECT is NULL, then update all sections' mapped state
3191 (after re-reading the entire target _ovly_table).
3192 If OSECT is non-NULL, then try to find a matching entry in the
3193 cached ovly_table and update only OSECT's mapped state.
3194 If a cached entry can't be found or the cache isn't valid, then
3195 re-read the entire cache, and go ahead and update all sections. */
3198 simple_overlay_update (osect)
3199 struct obj_section *osect;
3201 struct objfile *objfile;
3203 /* Were we given an osect to look up? NULL means do all of them. */
3205 /* Have we got a cached copy of the target's overlay table? */
3206 if (cache_ovly_table != NULL)
3207 /* Does its cached location match what's currently in the symtab? */
3208 if (cache_ovly_table_base ==
3209 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", 0, 0)))
3210 /* Then go ahead and try to look up this single section in the cache */
3211 if (simple_overlay_update_1 (osect))
3212 /* Found it! We're done. */
3215 /* Cached table no good: need to read the entire table anew.
3216 Or else we want all the sections, in which case it's actually
3217 more efficient to read the whole table in one block anyway. */
3219 if (simple_read_overlay_table () == 0) /* read failed? No table? */
3221 warning ("Failed to read the target overlay mapping table.");
3224 /* Now may as well update all sections, even if only one was requested. */
3225 ALL_OBJSECTIONS (objfile, osect)
3226 if (section_is_overlay (osect->the_bfd_section))
3230 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
3231 for (i = 0; i < cache_novlys; i++)
3232 if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma &&
3233 cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* &&
3234 cache_ovly_table[i][SIZE] == size */ )
3235 { /* obj_section matches i'th entry in ovly_table */
3236 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3237 break; /* finished with inner for loop: break out */
3244 _initialize_symfile ()
3246 struct cmd_list_element *c;
3248 c = add_cmd ("symbol-file", class_files, symbol_file_command,
3249 "Load symbol table from executable file FILE.\n\
3250 The `file' command can also load symbol tables, as well as setting the file\n\
3251 to execute.", &cmdlist);
3252 c->completer = filename_completer;
3254 c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command,
3255 "Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3256 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3257 ADDR is the starting address of the file's text.\n\
3258 The optional arguments are section-name section-address pairs and\n\
3259 should be specified if the data and bss segments are not contiguous\n\
3260 with the text. SECT is a section name to be loaded at SECT_ADDR.",
3262 c->completer = filename_completer;
3264 c = add_cmd ("add-shared-symbol-files", class_files,
3265 add_shared_symbol_files_command,
3266 "Load the symbols from shared objects in the dynamic linker's link map.",
3268 c = add_alias_cmd ("assf", "add-shared-symbol-files", class_files, 1,
3271 c = add_cmd ("load", class_files, load_command,
3272 "Dynamically load FILE into the running program, and record its symbols\n\
3273 for access from GDB.", &cmdlist);
3274 c->completer = filename_completer;
3277 (add_set_cmd ("symbol-reloading", class_support, var_boolean,
3278 (char *) &symbol_reloading,
3279 "Set dynamic symbol table reloading multiple times in one run.",
3283 add_prefix_cmd ("overlay", class_support, overlay_command,
3284 "Commands for debugging overlays.", &overlaylist,
3285 "overlay ", 0, &cmdlist);
3287 add_com_alias ("ovly", "overlay", class_alias, 1);
3288 add_com_alias ("ov", "overlay", class_alias, 1);
3290 add_cmd ("map-overlay", class_support, map_overlay_command,
3291 "Assert that an overlay section is mapped.", &overlaylist);
3293 add_cmd ("unmap-overlay", class_support, unmap_overlay_command,
3294 "Assert that an overlay section is unmapped.", &overlaylist);
3296 add_cmd ("list-overlays", class_support, list_overlays_command,
3297 "List mappings of overlay sections.", &overlaylist);
3299 add_cmd ("manual", class_support, overlay_manual_command,
3300 "Enable overlay debugging.", &overlaylist);
3301 add_cmd ("off", class_support, overlay_off_command,
3302 "Disable overlay debugging.", &overlaylist);
3303 add_cmd ("auto", class_support, overlay_auto_command,
3304 "Enable automatic overlay debugging.", &overlaylist);
3305 add_cmd ("load-target", class_support, overlay_load_command,
3306 "Read the overlay mapping state from the target.", &overlaylist);
3308 /* Filename extension to source language lookup table: */
3309 init_filename_language_table ();
3310 c = add_set_cmd ("extension-language", class_files, var_string_noescape,
3312 "Set mapping between filename extension and source language.\n\
3313 Usage: set extension-language .foo bar",
3315 c->function.cfunc = set_ext_lang_command;
3317 add_info ("extensions", info_ext_lang_command,
3318 "All filename extensions associated with a source language.");
3321 (add_set_cmd ("download-write-size", class_obscure,
3322 var_integer, (char *) &download_write_size,
3323 "Set the write size used when downloading a program.\n"
3324 "Only used when downloading a program onto a remote\n"
3325 "target. Specify zero, or a negative value, to disable\n"
3326 "blocked writes. The actual size of each transfer is also\n"
3327 "limited by the size of the target packet and the memory\n"