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;
522 objfile->num_sections = SECT_OFF_MAX;
523 objfile->section_offsets = (struct section_offsets *)
524 obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS);
525 memset (objfile->section_offsets, 0, SIZEOF_SECTION_OFFSETS);
527 /* Now calculate offsets for other sections. */
528 for (i = 0; i < MAX_SECTIONS && addrs->other[i].name; i++)
530 struct other_sections *osp ;
532 osp = &addrs->other[i] ;
533 if (addrs->other[i].addr == 0)
536 if (strcmp (".text", osp->name) == 0)
537 SECT_OFF_TEXT = osp->sectindex ;
538 else if (strcmp (".data", osp->name) == 0)
539 SECT_OFF_DATA = osp->sectindex ;
540 else if (strcmp (".bss", osp->name) == 0)
541 SECT_OFF_BSS = osp->sectindex ;
543 /* Record all sections in offsets */
544 ANOFFSET (objfile->section_offsets, osp->sectindex) = osp->addr;
549 /* Process a symbol file, as either the main file or as a dynamically
552 OBJFILE is where the symbols are to be read from.
554 ADDR is the address where the text segment was loaded, unless the
555 objfile is the main symbol file, in which case it is zero.
557 MAINLINE is nonzero if this is the main symbol file, or zero if
558 it's an extra symbol file such as dynamically loaded code.
560 VERBO is nonzero if the caller has printed a verbose message about
561 the symbol reading (and complaints can be more terse about it). */
564 syms_from_objfile (objfile, addrs, mainline, verbo)
565 struct objfile *objfile;
566 struct section_addr_info *addrs;
570 asection *lower_sect;
572 CORE_ADDR lower_offset;
573 struct section_addr_info local_addr;
574 struct cleanup *old_chain;
577 /* If ADDRS is NULL, initialize the local section_addr_info struct and
578 point ADDRS to it. We now establish the convention that an addr of
579 zero means no load address was specified. */
583 memset (&local_addr, 0, sizeof (local_addr));
587 init_entry_point_info (objfile);
588 find_sym_fns (objfile);
590 /* Make sure that partially constructed symbol tables will be cleaned up
591 if an error occurs during symbol reading. */
592 old_chain = make_cleanup ((make_cleanup_func) free_objfile, objfile);
596 /* We will modify the main symbol table, make sure that all its users
597 will be cleaned up if an error occurs during symbol reading. */
598 make_cleanup ((make_cleanup_func) clear_symtab_users, 0);
600 /* Since no error yet, throw away the old symbol table. */
602 if (symfile_objfile != NULL)
604 free_objfile (symfile_objfile);
605 symfile_objfile = NULL;
608 /* Currently we keep symbols from the add-symbol-file command.
609 If the user wants to get rid of them, they should do "symbol-file"
610 without arguments first. Not sure this is the best behavior
613 (*objfile->sf->sym_new_init) (objfile);
616 /* Convert addr into an offset rather than an absolute address.
617 We find the lowest address of a loaded segment in the objfile,
618 and assume that <addr> is where that got loaded.
620 We no longer warn if the lowest section is not a text segment (as
621 happens for the PA64 port. */
624 /* Find lowest loadable section to be used as starting point for
625 continguous sections. FIXME!! won't work without call to find
626 .text first, but this assumes text is lowest section. */
627 lower_sect = bfd_get_section_by_name (objfile->obfd, ".text");
628 if (lower_sect == NULL)
629 bfd_map_over_sections (objfile->obfd, find_lowest_section,
631 if (lower_sect == NULL)
632 warning ("no loadable sections found in added symbol-file %s",
634 else if ((bfd_get_section_flags (objfile->obfd, lower_sect) & SEC_CODE)
636 warning ("Lowest section in %s is %s at %s",
638 bfd_section_name (objfile->obfd, lower_sect),
639 paddr (bfd_section_vma (objfile->obfd, lower_sect)));
640 if (lower_sect != NULL)
641 lower_offset = bfd_section_vma (objfile->obfd, lower_sect);
645 /* Calculate offsets for the loadable sections.
646 FIXME! Sections must be in order of increasing loadable section
647 so that contiguous sections can use the lower-offset!!!
649 Adjust offsets if the segments are not contiguous.
650 If the section is contiguous, its offset should be set to
651 the offset of the highest loadable section lower than it
652 (the loadable section directly below it in memory).
653 this_offset = lower_offset = lower_addr - lower_orig_addr */
655 /* Calculate offsets for sections. */
656 for (i=0 ; i < MAX_SECTIONS && addrs->other[i].name; i++)
658 if (addrs->other[i].addr != 0)
660 sect = bfd_get_section_by_name (objfile->obfd, addrs->other[i].name);
663 addrs->other[i].addr -= bfd_section_vma (objfile->obfd, sect);
664 lower_offset = addrs->other[i].addr;
665 /* This is the index used by BFD. */
666 addrs->other[i].sectindex = sect->index ;
670 warning ("section %s not found in %s", addrs->other[i].name,
672 addrs->other[i].addr = 0;
676 addrs->other[i].addr = lower_offset;
680 /* Initialize symbol reading routines for this objfile, allow complaints to
681 appear for this new file, and record how verbose to be, then do the
682 initial symbol reading for this file. */
684 (*objfile->sf->sym_init) (objfile);
685 clear_complaints (1, verbo);
687 (*objfile->sf->sym_offsets) (objfile, addrs);
689 #ifndef IBM6000_TARGET
690 /* This is a SVR4/SunOS specific hack, I think. In any event, it
691 screws RS/6000. sym_offsets should be doing this sort of thing,
692 because it knows the mapping between bfd sections and
694 /* This is a hack. As far as I can tell, section offsets are not
695 target dependent. They are all set to addr with a couple of
696 exceptions. The exceptions are sysvr4 shared libraries, whose
697 offsets are kept in solib structures anyway and rs6000 xcoff
698 which handles shared libraries in a completely unique way.
700 Section offsets are built similarly, except that they are built
701 by adding addr in all cases because there is no clear mapping
702 from section_offsets into actual sections. Note that solib.c
703 has a different algorithm for finding section offsets.
705 These should probably all be collapsed into some target
706 independent form of shared library support. FIXME. */
710 struct obj_section *s;
712 /* Map section offsets in "addr" back to the object's
713 sections by comparing the section names with bfd's
714 section names. Then adjust the section address by
715 the offset. */ /* for gdb/13815 */
717 ALL_OBJFILE_OSECTIONS (objfile, s)
719 CORE_ADDR s_addr = 0;
723 !s_addr && i < MAX_SECTIONS && addrs->other[i].name;
725 if (strcmp (s->the_bfd_section->name, addrs->other[i].name) == 0)
726 s_addr = addrs->other[i].addr; /* end added for gdb/13815 */
728 s->addr -= s->offset;
730 s->endaddr -= s->offset;
731 s->endaddr += s_addr;
735 #endif /* not IBM6000_TARGET */
737 (*objfile->sf->sym_read) (objfile, mainline);
739 if (!have_partial_symbols () && !have_full_symbols ())
742 printf_filtered ("(no debugging symbols found)...");
746 /* Don't allow char * to have a typename (else would get caddr_t).
747 Ditto void *. FIXME: Check whether this is now done by all the
748 symbol readers themselves (many of them now do), and if so remove
751 TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0;
752 TYPE_NAME (lookup_pointer_type (builtin_type_void)) = 0;
754 /* Mark the objfile has having had initial symbol read attempted. Note
755 that this does not mean we found any symbols... */
757 objfile->flags |= OBJF_SYMS;
759 /* Discard cleanups as symbol reading was successful. */
761 discard_cleanups (old_chain);
763 /* Call this after reading in a new symbol table to give target
764 dependant code a crack at the new symbols. For instance, this
765 could be used to update the values of target-specific symbols GDB
766 needs to keep track of (such as _sigtramp, or whatever). */
768 TARGET_SYMFILE_POSTREAD (objfile);
771 /* Perform required actions after either reading in the initial
772 symbols for a new objfile, or mapping in the symbols from a reusable
776 new_symfile_objfile (objfile, mainline, verbo)
777 struct objfile *objfile;
782 /* If this is the main symbol file we have to clean up all users of the
783 old main symbol file. Otherwise it is sufficient to fixup all the
784 breakpoints that may have been redefined by this symbol file. */
787 /* OK, make it the "real" symbol file. */
788 symfile_objfile = objfile;
790 clear_symtab_users ();
794 breakpoint_re_set ();
797 /* We're done reading the symbol file; finish off complaints. */
798 clear_complaints (0, verbo);
801 /* Process a symbol file, as either the main file or as a dynamically
804 NAME is the file name (which will be tilde-expanded and made
805 absolute herein) (but we don't free or modify NAME itself).
806 FROM_TTY says how verbose to be. MAINLINE specifies whether this
807 is the main symbol file, or whether it's an extra symbol file such
808 as dynamically loaded code. If !mainline, ADDR is the address
809 where the text segment was loaded.
811 Upon success, returns a pointer to the objfile that was added.
812 Upon failure, jumps back to command level (never returns). */
815 symbol_file_add (name, from_tty, addrs, mainline, flags)
818 struct section_addr_info *addrs;
822 struct objfile *objfile;
823 struct partial_symtab *psymtab;
826 /* Open a bfd for the file, and give user a chance to burp if we'd be
827 interactively wiping out any existing symbols. */
829 abfd = symfile_bfd_open (name);
831 if ((have_full_symbols () || have_partial_symbols ())
834 && !query ("Load new symbol table from \"%s\"? ", name))
835 error ("Not confirmed.");
837 objfile = allocate_objfile (abfd, flags);
839 /* If the objfile uses a mapped symbol file, and we have a psymtab for
840 it, then skip reading any symbols at this time. */
842 if ((objfile->flags & OBJF_MAPPED) && (objfile->flags & OBJF_SYMS))
844 /* We mapped in an existing symbol table file that already has had
845 initial symbol reading performed, so we can skip that part. Notify
846 the user that instead of reading the symbols, they have been mapped.
848 if (from_tty || info_verbose)
850 printf_filtered ("Mapped symbols for %s...", name);
852 gdb_flush (gdb_stdout);
854 init_entry_point_info (objfile);
855 find_sym_fns (objfile);
859 /* We either created a new mapped symbol table, mapped an existing
860 symbol table file which has not had initial symbol reading
861 performed, or need to read an unmapped symbol table. */
862 if (from_tty || info_verbose)
864 if (pre_add_symbol_hook)
865 pre_add_symbol_hook (name);
868 printf_filtered ("Reading symbols from %s...", name);
870 gdb_flush (gdb_stdout);
873 syms_from_objfile (objfile, addrs, mainline, from_tty);
876 /* We now have at least a partial symbol table. Check to see if the
877 user requested that all symbols be read on initial access via either
878 the gdb startup command line or on a per symbol file basis. Expand
879 all partial symbol tables for this objfile if so. */
881 if ((flags & OBJF_READNOW) || readnow_symbol_files)
883 if (from_tty || info_verbose)
885 printf_filtered ("expanding to full symbols...");
887 gdb_flush (gdb_stdout);
890 for (psymtab = objfile->psymtabs;
892 psymtab = psymtab->next)
894 psymtab_to_symtab (psymtab);
898 if (from_tty || info_verbose)
900 if (post_add_symbol_hook)
901 post_add_symbol_hook ();
904 printf_filtered ("done.\n");
905 gdb_flush (gdb_stdout);
909 new_symfile_objfile (objfile, mainline, from_tty);
911 if (target_new_objfile_hook)
912 target_new_objfile_hook (objfile);
917 /* This is the symbol-file command. Read the file, analyze its
918 symbols, and add a struct symtab to a symtab list. The syntax of
919 the command is rather bizarre--(1) buildargv implements various
920 quoting conventions which are undocumented and have little or
921 nothing in common with the way things are quoted (or not quoted)
922 elsewhere in GDB, (2) options are used, which are not generally
923 used in GDB (perhaps "set mapped on", "set readnow on" would be
924 better), (3) the order of options matters, which is contrary to GNU
925 conventions (because it is confusing and inconvenient). */
926 /* Note: ezannoni 2000-04-17. This function used to have support for
927 rombug (see remote-os9k.c). It consisted of a call to target_link()
928 (target.c) to get the address of the text segment from the target,
929 and pass that to symbol_file_add(). This is no longer supported. */
932 symbol_file_command (args, from_tty)
938 struct cleanup *cleanups;
939 int flags = OBJF_USERLOADED;
945 if ((have_full_symbols () || have_partial_symbols ())
947 && !query ("Discard symbol table from `%s'? ",
948 symfile_objfile->name))
949 error ("Not confirmed.");
950 free_all_objfiles ();
952 /* solib descriptors may have handles to objfiles. Since their
953 storage has just been released, we'd better wipe the solib
956 #if defined(SOLIB_RESTART)
960 symfile_objfile = NULL;
962 printf_unfiltered ("No symbol file now.\n");
964 RESET_HP_UX_GLOBALS ();
969 if ((argv = buildargv (args)) == NULL)
973 cleanups = make_cleanup_freeargv (argv);
974 while (*argv != NULL)
976 if (STREQ (*argv, "-mapped"))
977 flags |= OBJF_MAPPED;
979 if (STREQ (*argv, "-readnow"))
980 flags |= OBJF_READNOW;
983 error ("unknown option `%s'", *argv);
987 symbol_file_add (name, from_tty, NULL, 1, flags);
989 RESET_HP_UX_GLOBALS ();
991 /* Getting new symbols may change our opinion about
992 what is frameless. */
993 reinit_frame_cache ();
995 set_initial_language ();
1002 error ("no symbol file name was specified");
1004 TUIDO (((TuiOpaqueFuncPtr) tuiDisplayMainFunction));
1005 do_cleanups (cleanups);
1009 /* Set the initial language.
1011 A better solution would be to record the language in the psymtab when reading
1012 partial symbols, and then use it (if known) to set the language. This would
1013 be a win for formats that encode the language in an easily discoverable place,
1014 such as DWARF. For stabs, we can jump through hoops looking for specially
1015 named symbols or try to intuit the language from the specific type of stabs
1016 we find, but we can't do that until later when we read in full symbols.
1020 set_initial_language ()
1022 struct partial_symtab *pst;
1023 enum language lang = language_unknown;
1025 pst = find_main_psymtab ();
1028 if (pst->filename != NULL)
1030 lang = deduce_language_from_filename (pst->filename);
1032 if (lang == language_unknown)
1034 /* Make C the default language */
1037 set_language (lang);
1038 expected_language = current_language; /* Don't warn the user */
1042 /* Open file specified by NAME and hand it off to BFD for preliminary
1043 analysis. Result is a newly initialized bfd *, which includes a newly
1044 malloc'd` copy of NAME (tilde-expanded and made absolute).
1045 In case of trouble, error() is called. */
1048 symfile_bfd_open (name)
1053 char *absolute_name;
1057 name = tilde_expand (name); /* Returns 1st new malloc'd copy */
1059 /* Look down path for it, allocate 2nd new malloc'd copy. */
1060 desc = openp (getenv ("PATH"), 1, name, O_RDONLY | O_BINARY, 0, &absolute_name);
1061 #if defined(__GO32__) || defined(_WIN32)
1064 char *exename = alloca (strlen (name) + 5);
1065 strcat (strcpy (exename, name), ".exe");
1066 desc = openp (getenv ("PATH"), 1, exename, O_RDONLY | O_BINARY,
1072 make_cleanup (free, name);
1073 perror_with_name (name);
1075 free (name); /* Free 1st new malloc'd copy */
1076 name = absolute_name; /* Keep 2nd malloc'd copy in bfd */
1077 /* It'll be freed in free_objfile(). */
1079 sym_bfd = bfd_fdopenr (name, gnutarget, desc);
1083 make_cleanup (free, name);
1084 error ("\"%s\": can't open to read symbols: %s.", name,
1085 bfd_errmsg (bfd_get_error ()));
1087 sym_bfd->cacheable = true;
1089 if (!bfd_check_format (sym_bfd, bfd_object))
1091 /* FIXME: should be checking for errors from bfd_close (for one thing,
1092 on error it does not free all the storage associated with the
1094 bfd_close (sym_bfd); /* This also closes desc */
1095 make_cleanup (free, name);
1096 error ("\"%s\": can't read symbols: %s.", name,
1097 bfd_errmsg (bfd_get_error ()));
1102 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1103 startup by the _initialize routine in each object file format reader,
1104 to register information about each format the the reader is prepared
1111 sf->next = symtab_fns;
1116 /* Initialize to read symbols from the symbol file sym_bfd. It either
1117 returns or calls error(). The result is an initialized struct sym_fns
1118 in the objfile structure, that contains cached information about the
1122 find_sym_fns (objfile)
1123 struct objfile *objfile;
1126 enum bfd_flavour our_flavour = bfd_get_flavour (objfile->obfd);
1127 char *our_target = bfd_get_target (objfile->obfd);
1129 /* Special kludge for RS/6000 and PowerMac. See xcoffread.c. */
1130 if (STREQ (our_target, "aixcoff-rs6000") ||
1131 STREQ (our_target, "xcoff-powermac"))
1132 our_flavour = (enum bfd_flavour) -1;
1134 /* Special kludge for apollo. See dstread.c. */
1135 if (STREQN (our_target, "apollo", 6))
1136 our_flavour = (enum bfd_flavour) -2;
1138 for (sf = symtab_fns; sf != NULL; sf = sf->next)
1140 if (our_flavour == sf->sym_flavour)
1146 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
1147 bfd_get_target (objfile->obfd));
1150 /* This function runs the load command of our current target. */
1153 load_command (arg, from_tty)
1158 arg = get_exec_file (1);
1159 target_load (arg, from_tty);
1162 /* This version of "load" should be usable for any target. Currently
1163 it is just used for remote targets, not inftarg.c or core files,
1164 on the theory that only in that case is it useful.
1166 Avoiding xmodem and the like seems like a win (a) because we don't have
1167 to worry about finding it, and (b) On VMS, fork() is very slow and so
1168 we don't want to run a subprocess. On the other hand, I'm not sure how
1169 performance compares. */
1171 static int download_write_size = 512;
1172 static int validate_download = 0;
1175 generic_load (char *args, int from_tty)
1179 time_t start_time, end_time; /* Start and end times of download */
1180 unsigned long data_count = 0; /* Number of bytes transferred to memory */
1181 unsigned long write_count = 0; /* Number of writes needed. */
1182 unsigned long load_offset; /* offset to add to vma for each section */
1184 struct cleanup *old_cleanups;
1186 CORE_ADDR total_size = 0;
1187 CORE_ADDR total_sent = 0;
1189 /* Parse the input argument - the user can specify a load offset as
1190 a second argument. */
1191 filename = xmalloc (strlen (args) + 1);
1192 old_cleanups = make_cleanup (free, filename);
1193 strcpy (filename, args);
1194 offptr = strchr (filename, ' ');
1198 load_offset = strtoul (offptr, &endptr, 0);
1199 if (offptr == endptr)
1200 error ("Invalid download offset:%s\n", offptr);
1206 /* Open the file for loading. */
1207 loadfile_bfd = bfd_openr (filename, gnutarget);
1208 if (loadfile_bfd == NULL)
1210 perror_with_name (filename);
1214 /* FIXME: should be checking for errors from bfd_close (for one thing,
1215 on error it does not free all the storage associated with the
1217 make_cleanup ((make_cleanup_func) bfd_close, loadfile_bfd);
1219 if (!bfd_check_format (loadfile_bfd, bfd_object))
1221 error ("\"%s\" is not an object file: %s", filename,
1222 bfd_errmsg (bfd_get_error ()));
1225 for (s = loadfile_bfd->sections; s; s = s->next)
1226 if (s->flags & SEC_LOAD)
1227 total_size += bfd_get_section_size_before_reloc (s);
1229 start_time = time (NULL);
1231 for (s = loadfile_bfd->sections; s; s = s->next)
1233 if (s->flags & SEC_LOAD)
1235 CORE_ADDR size = bfd_get_section_size_before_reloc (s);
1239 struct cleanup *old_chain;
1240 CORE_ADDR lma = s->lma + load_offset;
1241 CORE_ADDR block_size;
1243 const char *sect_name = bfd_get_section_name (loadfile_bfd, s);
1246 if (download_write_size > 0 && size > download_write_size)
1247 block_size = download_write_size;
1251 buffer = xmalloc (size);
1252 old_chain = make_cleanup (free, buffer);
1254 /* Is this really necessary? I guess it gives the user something
1255 to look at during a long download. */
1257 ui_out_message (uiout, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1258 sect_name, paddr_nz (size), paddr_nz (lma));
1260 fprintf_unfiltered (gdb_stdout,
1261 "Loading section %s, size 0x%s lma 0x%s\n",
1262 sect_name, paddr_nz (size), paddr_nz (lma));
1265 bfd_get_section_contents (loadfile_bfd, s, buffer, 0, size);
1271 CORE_ADDR this_transfer = size - sent;
1272 if (this_transfer >= block_size)
1273 this_transfer = block_size;
1274 len = target_write_memory_partial (lma, buffer,
1275 this_transfer, &err);
1278 if (validate_download)
1280 /* Broken memories and broken monitors manifest
1281 themselves here when bring new computers to
1282 life. This doubles already slow downloads. */
1283 /* NOTE: cagney/1999-10-18: A more efficient
1284 implementation might add a verify_memory()
1285 method to the target vector and then use
1286 that. remote.c could implement that method
1287 using the ``qCRC'' packet. */
1288 char *check = xmalloc (len);
1289 struct cleanup *verify_cleanups = make_cleanup (free, check);
1290 if (target_read_memory (lma, check, len) != 0)
1291 error ("Download verify read failed at 0x%s",
1293 if (memcmp (buffer, check, len) != 0)
1294 error ("Download verify compare failed at 0x%s",
1296 do_cleanups (verify_cleanups);
1305 || (ui_load_progress_hook != NULL
1306 && ui_load_progress_hook (sect_name, sent)))
1307 error ("Canceled the download");
1309 if (show_load_progress != NULL)
1310 show_load_progress (sect_name, sent, size, total_sent, total_size);
1312 while (sent < size);
1315 error ("Memory access error while loading section %s.", sect_name);
1317 do_cleanups (old_chain);
1322 end_time = time (NULL);
1325 entry = bfd_get_start_address (loadfile_bfd);
1327 ui_out_text (uiout, "Start address ");
1328 ui_out_field_fmt (uiout, "address", "0x%s" , paddr_nz (entry));
1329 ui_out_text (uiout, ", load size ");
1330 ui_out_field_fmt (uiout, "load-size", "%ld" , data_count);
1331 ui_out_text (uiout, "\n");
1334 fprintf_unfiltered (gdb_stdout,
1335 "Start address 0x%s , load size %ld\n",
1336 paddr_nz (entry), data_count);
1338 /* We were doing this in remote-mips.c, I suspect it is right
1339 for other targets too. */
1343 /* FIXME: are we supposed to call symbol_file_add or not? According to
1344 a comment from remote-mips.c (where a call to symbol_file_add was
1345 commented out), making the call confuses GDB if more than one file is
1346 loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c
1349 print_transfer_performance (gdb_stdout, data_count, write_count,
1350 end_time - start_time);
1352 do_cleanups (old_cleanups);
1355 /* Report how fast the transfer went. */
1357 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1358 replaced by print_transfer_performance (with a very different
1359 function signature). */
1362 report_transfer_performance (data_count, start_time, end_time)
1363 unsigned long data_count;
1364 time_t start_time, end_time;
1366 print_transfer_performance (gdb_stdout, data_count, end_time - start_time, 0);
1370 print_transfer_performance (struct ui_file *stream,
1371 unsigned long data_count,
1372 unsigned long write_count,
1373 unsigned long time_count)
1376 ui_out_text (uiout, "Transfer rate: ");
1379 ui_out_field_fmt (uiout, "transfer-rate", "%ld",
1380 (data_count * 8) / time_count);
1381 ui_out_text (uiout, " bits/sec");
1385 ui_out_field_fmt (uiout, "transferred-bits", "%ld", (data_count * 8));
1386 ui_out_text (uiout, " bits in <1 sec");
1388 if (write_count > 0)
1390 ui_out_text (uiout, ", ");
1391 ui_out_field_fmt (uiout, "write-rate", "%ld", data_count / write_count);
1392 ui_out_text (uiout, " bytes/write");
1394 ui_out_text (uiout, ".\n");
1396 fprintf_unfiltered (stream, "Transfer rate: ");
1398 fprintf_unfiltered (stream, "%ld bits/sec", (data_count * 8) / time_count);
1400 fprintf_unfiltered (stream, "%ld bits in <1 sec", (data_count * 8));
1401 if (write_count > 0)
1402 fprintf_unfiltered (stream, ", %ld bytes/write", data_count / write_count);
1403 fprintf_unfiltered (stream, ".\n");
1407 /* This function allows the addition of incrementally linked object files.
1408 It does not modify any state in the target, only in the debugger. */
1409 /* Note: ezannoni 2000-04-13 This function/command used to have a
1410 special case syntax for the rombug target (Rombug is the boot
1411 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
1412 rombug case, the user doesn't need to supply a text address,
1413 instead a call to target_link() (in target.c) would supply the
1414 value to use. We are now discontinuing this type of ad hoc syntax. */
1418 add_symbol_file_command (args, from_tty)
1422 char *filename = NULL;
1423 int flags = OBJF_USERLOADED;
1425 int expecting_option = 0;
1426 int section_index = 0;
1430 int expecting_sec_name = 0;
1431 int expecting_sec_addr = 0;
1437 } sect_opts[SECT_OFF_MAX];
1439 struct section_addr_info section_addrs;
1440 struct cleanup *my_cleanups;
1445 error ("add-symbol-file takes a file name and an address");
1447 /* Make a copy of the string that we can safely write into. */
1448 args = xstrdup (args);
1450 /* Ensure section_addrs is initialized */
1451 memset (§ion_addrs, 0, sizeof (section_addrs));
1453 while (*args != '\000')
1455 /* Any leading spaces? */
1456 while (isspace (*args))
1459 /* Point arg to the beginning of the argument. */
1462 /* Move args pointer over the argument. */
1463 while ((*args != '\000') && !isspace (*args))
1466 /* If there are more arguments, terminate arg and
1468 if (*args != '\000')
1471 /* Now process the argument. */
1474 /* The first argument is the file name. */
1475 filename = tilde_expand (arg);
1476 my_cleanups = make_cleanup (free, filename);
1481 /* The second argument is always the text address at which
1482 to load the program. */
1483 sect_opts[section_index].name = ".text";
1484 sect_opts[section_index].value = arg;
1489 /* It's an option (starting with '-') or it's an argument
1494 if (strcmp (arg, "-mapped") == 0)
1495 flags |= OBJF_MAPPED;
1497 if (strcmp (arg, "-readnow") == 0)
1498 flags |= OBJF_READNOW;
1500 if (strcmp (arg, "-s") == 0)
1502 if (section_index >= SECT_OFF_MAX)
1503 error ("Too many sections specified.");
1504 expecting_sec_name = 1;
1505 expecting_sec_addr = 1;
1510 if (expecting_sec_name)
1512 sect_opts[section_index].name = arg;
1513 expecting_sec_name = 0;
1516 if (expecting_sec_addr)
1518 sect_opts[section_index].value = arg;
1519 expecting_sec_addr = 0;
1523 error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*");
1529 /* Print the prompt for the query below. And save the arguments into
1530 a sect_addr_info structure to be passed around to other
1531 functions. We have to split this up into separate print
1532 statements because local_hex_string returns a local static
1535 printf_filtered ("add symbol table from file \"%s\" at\n", filename);
1536 for (i = 0; i < section_index; i++)
1539 char *val = sect_opts[i].value;
1540 char *sec = sect_opts[i].name;
1542 val = sect_opts[i].value;
1543 if (val[0] == '0' && val[1] == 'x')
1544 addr = strtoul (val+2, NULL, 16);
1546 addr = strtoul (val, NULL, 10);
1548 /* Here we store the section offsets in the order they were
1549 entered on the command line. */
1550 section_addrs.other[sec_num].name = sec;
1551 section_addrs.other[sec_num].addr = addr;
1552 printf_filtered ("\t%s_addr = %s\n",
1554 local_hex_string ((unsigned long)addr));
1557 /* The object's sections are initialized when a
1558 call is made to build_objfile_section_table (objfile).
1559 This happens in reread_symbols.
1560 At this point, we don't know what file type this is,
1561 so we can't determine what section names are valid. */
1564 if (from_tty && (!query ("%s", "")))
1565 error ("Not confirmed.");
1567 symbol_file_add (filename, from_tty, §ion_addrs, 0, flags);
1569 /* Getting new symbols may change our opinion about what is
1571 reinit_frame_cache ();
1572 do_cleanups (my_cleanups);
1576 add_shared_symbol_files_command (args, from_tty)
1580 #ifdef ADD_SHARED_SYMBOL_FILES
1581 ADD_SHARED_SYMBOL_FILES (args, from_tty);
1583 error ("This command is not available in this configuration of GDB.");
1587 /* Re-read symbols if a symbol-file has changed. */
1591 struct objfile *objfile;
1594 struct stat new_statbuf;
1597 /* With the addition of shared libraries, this should be modified,
1598 the load time should be saved in the partial symbol tables, since
1599 different tables may come from different source files. FIXME.
1600 This routine should then walk down each partial symbol table
1601 and see if the symbol table that it originates from has been changed */
1603 for (objfile = object_files; objfile; objfile = objfile->next)
1607 #ifdef IBM6000_TARGET
1608 /* If this object is from a shared library, then you should
1609 stat on the library name, not member name. */
1611 if (objfile->obfd->my_archive)
1612 res = stat (objfile->obfd->my_archive->filename, &new_statbuf);
1615 res = stat (objfile->name, &new_statbuf);
1618 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1619 printf_filtered ("`%s' has disappeared; keeping its symbols.\n",
1623 new_modtime = new_statbuf.st_mtime;
1624 if (new_modtime != objfile->mtime)
1626 struct cleanup *old_cleanups;
1627 struct section_offsets *offsets;
1629 char *obfd_filename;
1631 printf_filtered ("`%s' has changed; re-reading symbols.\n",
1634 /* There are various functions like symbol_file_add,
1635 symfile_bfd_open, syms_from_objfile, etc., which might
1636 appear to do what we want. But they have various other
1637 effects which we *don't* want. So we just do stuff
1638 ourselves. We don't worry about mapped files (for one thing,
1639 any mapped file will be out of date). */
1641 /* If we get an error, blow away this objfile (not sure if
1642 that is the correct response for things like shared
1644 old_cleanups = make_cleanup ((make_cleanup_func) free_objfile,
1646 /* We need to do this whenever any symbols go away. */
1647 make_cleanup ((make_cleanup_func) clear_symtab_users, 0);
1649 /* Clean up any state BFD has sitting around. We don't need
1650 to close the descriptor but BFD lacks a way of closing the
1651 BFD without closing the descriptor. */
1652 obfd_filename = bfd_get_filename (objfile->obfd);
1653 if (!bfd_close (objfile->obfd))
1654 error ("Can't close BFD for %s: %s", objfile->name,
1655 bfd_errmsg (bfd_get_error ()));
1656 objfile->obfd = bfd_openr (obfd_filename, gnutarget);
1657 if (objfile->obfd == NULL)
1658 error ("Can't open %s to read symbols.", objfile->name);
1659 /* bfd_openr sets cacheable to true, which is what we want. */
1660 if (!bfd_check_format (objfile->obfd, bfd_object))
1661 error ("Can't read symbols from %s: %s.", objfile->name,
1662 bfd_errmsg (bfd_get_error ()));
1664 /* Save the offsets, we will nuke them with the rest of the
1666 num_offsets = objfile->num_sections;
1667 offsets = (struct section_offsets *) alloca (SIZEOF_SECTION_OFFSETS);
1668 memcpy (offsets, objfile->section_offsets, SIZEOF_SECTION_OFFSETS);
1670 /* Nuke all the state that we will re-read. Much of the following
1671 code which sets things to NULL really is necessary to tell
1672 other parts of GDB that there is nothing currently there. */
1674 /* FIXME: Do we have to free a whole linked list, or is this
1676 if (objfile->global_psymbols.list)
1677 mfree (objfile->md, objfile->global_psymbols.list);
1678 memset (&objfile->global_psymbols, 0,
1679 sizeof (objfile->global_psymbols));
1680 if (objfile->static_psymbols.list)
1681 mfree (objfile->md, objfile->static_psymbols.list);
1682 memset (&objfile->static_psymbols, 0,
1683 sizeof (objfile->static_psymbols));
1685 /* Free the obstacks for non-reusable objfiles */
1686 free_bcache (&objfile->psymbol_cache);
1687 obstack_free (&objfile->psymbol_obstack, 0);
1688 obstack_free (&objfile->symbol_obstack, 0);
1689 obstack_free (&objfile->type_obstack, 0);
1690 objfile->sections = NULL;
1691 objfile->symtabs = NULL;
1692 objfile->psymtabs = NULL;
1693 objfile->free_psymtabs = NULL;
1694 objfile->msymbols = NULL;
1695 objfile->minimal_symbol_count = 0;
1696 memset (&objfile->msymbol_hash, 0,
1697 sizeof (objfile->msymbol_hash));
1698 memset (&objfile->msymbol_demangled_hash, 0,
1699 sizeof (objfile->msymbol_demangled_hash));
1700 objfile->fundamental_types = NULL;
1701 if (objfile->sf != NULL)
1703 (*objfile->sf->sym_finish) (objfile);
1706 /* We never make this a mapped file. */
1708 /* obstack_specify_allocation also initializes the obstack so
1710 obstack_specify_allocation (&objfile->psymbol_cache.cache, 0, 0,
1712 obstack_specify_allocation (&objfile->psymbol_obstack, 0, 0,
1714 obstack_specify_allocation (&objfile->symbol_obstack, 0, 0,
1716 obstack_specify_allocation (&objfile->type_obstack, 0, 0,
1718 if (build_objfile_section_table (objfile))
1720 error ("Can't find the file sections in `%s': %s",
1721 objfile->name, bfd_errmsg (bfd_get_error ()));
1724 /* We use the same section offsets as from last time. I'm not
1725 sure whether that is always correct for shared libraries. */
1726 objfile->section_offsets = (struct section_offsets *)
1727 obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS);
1728 memcpy (objfile->section_offsets, offsets, SIZEOF_SECTION_OFFSETS);
1729 objfile->num_sections = num_offsets;
1731 /* What the hell is sym_new_init for, anyway? The concept of
1732 distinguishing between the main file and additional files
1733 in this way seems rather dubious. */
1734 if (objfile == symfile_objfile)
1736 (*objfile->sf->sym_new_init) (objfile);
1738 RESET_HP_UX_GLOBALS ();
1742 (*objfile->sf->sym_init) (objfile);
1743 clear_complaints (1, 1);
1744 /* The "mainline" parameter is a hideous hack; I think leaving it
1745 zero is OK since dbxread.c also does what it needs to do if
1746 objfile->global_psymbols.size is 0. */
1747 (*objfile->sf->sym_read) (objfile, 0);
1748 if (!have_partial_symbols () && !have_full_symbols ())
1751 printf_filtered ("(no debugging symbols found)\n");
1754 objfile->flags |= OBJF_SYMS;
1756 /* We're done reading the symbol file; finish off complaints. */
1757 clear_complaints (0, 1);
1759 /* Getting new symbols may change our opinion about what is
1762 reinit_frame_cache ();
1764 /* Discard cleanups as symbol reading was successful. */
1765 discard_cleanups (old_cleanups);
1767 /* If the mtime has changed between the time we set new_modtime
1768 and now, we *want* this to be out of date, so don't call stat
1770 objfile->mtime = new_modtime;
1773 /* Call this after reading in a new symbol table to give target
1774 dependant code a crack at the new symbols. For instance, this
1775 could be used to update the values of target-specific symbols GDB
1776 needs to keep track of (such as _sigtramp, or whatever). */
1778 TARGET_SYMFILE_POSTREAD (objfile);
1784 clear_symtab_users ();
1796 static filename_language *filename_language_table;
1797 static int fl_table_size, fl_table_next;
1800 add_filename_language (ext, lang)
1804 if (fl_table_next >= fl_table_size)
1806 fl_table_size += 10;
1807 filename_language_table = realloc (filename_language_table,
1811 filename_language_table[fl_table_next].ext = strsave (ext);
1812 filename_language_table[fl_table_next].lang = lang;
1816 static char *ext_args;
1819 set_ext_lang_command (args, from_tty)
1824 char *cp = ext_args;
1827 /* First arg is filename extension, starting with '.' */
1829 error ("'%s': Filename extension must begin with '.'", ext_args);
1831 /* Find end of first arg. */
1832 while (*cp && !isspace (*cp))
1836 error ("'%s': two arguments required -- filename extension and language",
1839 /* Null-terminate first arg */
1842 /* Find beginning of second arg, which should be a source language. */
1843 while (*cp && isspace (*cp))
1847 error ("'%s': two arguments required -- filename extension and language",
1850 /* Lookup the language from among those we know. */
1851 lang = language_enum (cp);
1853 /* Now lookup the filename extension: do we already know it? */
1854 for (i = 0; i < fl_table_next; i++)
1855 if (0 == strcmp (ext_args, filename_language_table[i].ext))
1858 if (i >= fl_table_next)
1860 /* new file extension */
1861 add_filename_language (ext_args, lang);
1865 /* redefining a previously known filename extension */
1868 /* query ("Really make files of type %s '%s'?", */
1869 /* ext_args, language_str (lang)); */
1871 free (filename_language_table[i].ext);
1872 filename_language_table[i].ext = strsave (ext_args);
1873 filename_language_table[i].lang = lang;
1878 info_ext_lang_command (args, from_tty)
1884 printf_filtered ("Filename extensions and the languages they represent:");
1885 printf_filtered ("\n\n");
1886 for (i = 0; i < fl_table_next; i++)
1887 printf_filtered ("\t%s\t- %s\n",
1888 filename_language_table[i].ext,
1889 language_str (filename_language_table[i].lang));
1893 init_filename_language_table ()
1895 if (fl_table_size == 0) /* protect against repetition */
1899 filename_language_table =
1900 xmalloc (fl_table_size * sizeof (*filename_language_table));
1901 add_filename_language (".c", language_c);
1902 add_filename_language (".C", language_cplus);
1903 add_filename_language (".cc", language_cplus);
1904 add_filename_language (".cp", language_cplus);
1905 add_filename_language (".cpp", language_cplus);
1906 add_filename_language (".cxx", language_cplus);
1907 add_filename_language (".c++", language_cplus);
1908 add_filename_language (".java", language_java);
1909 add_filename_language (".class", language_java);
1910 add_filename_language (".ch", language_chill);
1911 add_filename_language (".c186", language_chill);
1912 add_filename_language (".c286", language_chill);
1913 add_filename_language (".f", language_fortran);
1914 add_filename_language (".F", language_fortran);
1915 add_filename_language (".s", language_asm);
1916 add_filename_language (".S", language_asm);
1921 deduce_language_from_filename (filename)
1927 if (filename != NULL)
1928 if ((cp = strrchr (filename, '.')) != NULL)
1929 for (i = 0; i < fl_table_next; i++)
1930 if (strcmp (cp, filename_language_table[i].ext) == 0)
1931 return filename_language_table[i].lang;
1933 return language_unknown;
1938 Allocate and partly initialize a new symbol table. Return a pointer
1939 to it. error() if no space.
1941 Caller must set these fields:
1947 possibly free_named_symtabs (symtab->filename);
1951 allocate_symtab (filename, objfile)
1953 struct objfile *objfile;
1955 register struct symtab *symtab;
1957 symtab = (struct symtab *)
1958 obstack_alloc (&objfile->symbol_obstack, sizeof (struct symtab));
1959 memset (symtab, 0, sizeof (*symtab));
1960 symtab->filename = obsavestring (filename, strlen (filename),
1961 &objfile->symbol_obstack);
1962 symtab->fullname = NULL;
1963 symtab->language = deduce_language_from_filename (filename);
1964 symtab->debugformat = obsavestring ("unknown", 7,
1965 &objfile->symbol_obstack);
1967 /* Hook it to the objfile it comes from */
1969 symtab->objfile = objfile;
1970 symtab->next = objfile->symtabs;
1971 objfile->symtabs = symtab;
1973 /* FIXME: This should go away. It is only defined for the Z8000,
1974 and the Z8000 definition of this macro doesn't have anything to
1975 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
1976 here for convenience. */
1977 #ifdef INIT_EXTRA_SYMTAB_INFO
1978 INIT_EXTRA_SYMTAB_INFO (symtab);
1984 struct partial_symtab *
1985 allocate_psymtab (filename, objfile)
1987 struct objfile *objfile;
1989 struct partial_symtab *psymtab;
1991 if (objfile->free_psymtabs)
1993 psymtab = objfile->free_psymtabs;
1994 objfile->free_psymtabs = psymtab->next;
1997 psymtab = (struct partial_symtab *)
1998 obstack_alloc (&objfile->psymbol_obstack,
1999 sizeof (struct partial_symtab));
2001 memset (psymtab, 0, sizeof (struct partial_symtab));
2002 psymtab->filename = obsavestring (filename, strlen (filename),
2003 &objfile->psymbol_obstack);
2004 psymtab->symtab = NULL;
2006 /* Prepend it to the psymtab list for the objfile it belongs to.
2007 Psymtabs are searched in most recent inserted -> least recent
2010 psymtab->objfile = objfile;
2011 psymtab->next = objfile->psymtabs;
2012 objfile->psymtabs = psymtab;
2015 struct partial_symtab **prev_pst;
2016 psymtab->objfile = objfile;
2017 psymtab->next = NULL;
2018 prev_pst = &(objfile->psymtabs);
2019 while ((*prev_pst) != NULL)
2020 prev_pst = &((*prev_pst)->next);
2021 (*prev_pst) = psymtab;
2029 discard_psymtab (pst)
2030 struct partial_symtab *pst;
2032 struct partial_symtab **prev_pst;
2035 Empty psymtabs happen as a result of header files which don't
2036 have any symbols in them. There can be a lot of them. But this
2037 check is wrong, in that a psymtab with N_SLINE entries but
2038 nothing else is not empty, but we don't realize that. Fixing
2039 that without slowing things down might be tricky. */
2041 /* First, snip it out of the psymtab chain */
2043 prev_pst = &(pst->objfile->psymtabs);
2044 while ((*prev_pst) != pst)
2045 prev_pst = &((*prev_pst)->next);
2046 (*prev_pst) = pst->next;
2048 /* Next, put it on a free list for recycling */
2050 pst->next = pst->objfile->free_psymtabs;
2051 pst->objfile->free_psymtabs = pst;
2055 /* Reset all data structures in gdb which may contain references to symbol
2059 clear_symtab_users ()
2061 /* Someday, we should do better than this, by only blowing away
2062 the things that really need to be blown. */
2063 clear_value_history ();
2065 clear_internalvars ();
2066 breakpoint_re_set ();
2067 set_default_breakpoint (0, 0, 0, 0);
2068 current_source_symtab = 0;
2069 current_source_line = 0;
2070 clear_pc_function_cache ();
2071 if (target_new_objfile_hook)
2072 target_new_objfile_hook (NULL);
2075 /* clear_symtab_users_once:
2077 This function is run after symbol reading, or from a cleanup.
2078 If an old symbol table was obsoleted, the old symbol table
2079 has been blown away, but the other GDB data structures that may
2080 reference it have not yet been cleared or re-directed. (The old
2081 symtab was zapped, and the cleanup queued, in free_named_symtab()
2084 This function can be queued N times as a cleanup, or called
2085 directly; it will do all the work the first time, and then will be a
2086 no-op until the next time it is queued. This works by bumping a
2087 counter at queueing time. Much later when the cleanup is run, or at
2088 the end of symbol processing (in case the cleanup is discarded), if
2089 the queued count is greater than the "done-count", we do the work
2090 and set the done-count to the queued count. If the queued count is
2091 less than or equal to the done-count, we just ignore the call. This
2092 is needed because reading a single .o file will often replace many
2093 symtabs (one per .h file, for example), and we don't want to reset
2094 the breakpoints N times in the user's face.
2096 The reason we both queue a cleanup, and call it directly after symbol
2097 reading, is because the cleanup protects us in case of errors, but is
2098 discarded if symbol reading is successful. */
2101 /* FIXME: As free_named_symtabs is currently a big noop this function
2102 is no longer needed. */
2104 clear_symtab_users_once PARAMS ((void));
2106 static int clear_symtab_users_queued;
2107 static int clear_symtab_users_done;
2110 clear_symtab_users_once ()
2112 /* Enforce once-per-`do_cleanups'-semantics */
2113 if (clear_symtab_users_queued <= clear_symtab_users_done)
2115 clear_symtab_users_done = clear_symtab_users_queued;
2117 clear_symtab_users ();
2121 /* Delete the specified psymtab, and any others that reference it. */
2124 cashier_psymtab (pst)
2125 struct partial_symtab *pst;
2127 struct partial_symtab *ps, *pprev = NULL;
2130 /* Find its previous psymtab in the chain */
2131 for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
2140 /* Unhook it from the chain. */
2141 if (ps == pst->objfile->psymtabs)
2142 pst->objfile->psymtabs = ps->next;
2144 pprev->next = ps->next;
2146 /* FIXME, we can't conveniently deallocate the entries in the
2147 partial_symbol lists (global_psymbols/static_psymbols) that
2148 this psymtab points to. These just take up space until all
2149 the psymtabs are reclaimed. Ditto the dependencies list and
2150 filename, which are all in the psymbol_obstack. */
2152 /* We need to cashier any psymtab that has this one as a dependency... */
2154 for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
2156 for (i = 0; i < ps->number_of_dependencies; i++)
2158 if (ps->dependencies[i] == pst)
2160 cashier_psymtab (ps);
2161 goto again; /* Must restart, chain has been munged. */
2168 /* If a symtab or psymtab for filename NAME is found, free it along
2169 with any dependent breakpoints, displays, etc.
2170 Used when loading new versions of object modules with the "add-file"
2171 command. This is only called on the top-level symtab or psymtab's name;
2172 it is not called for subsidiary files such as .h files.
2174 Return value is 1 if we blew away the environment, 0 if not.
2175 FIXME. The return valu appears to never be used.
2177 FIXME. I think this is not the best way to do this. We should
2178 work on being gentler to the environment while still cleaning up
2179 all stray pointers into the freed symtab. */
2182 free_named_symtabs (name)
2186 /* FIXME: With the new method of each objfile having it's own
2187 psymtab list, this function needs serious rethinking. In particular,
2188 why was it ever necessary to toss psymtabs with specific compilation
2189 unit filenames, as opposed to all psymtabs from a particular symbol
2191 Well, the answer is that some systems permit reloading of particular
2192 compilation units. We want to blow away any old info about these
2193 compilation units, regardless of which objfiles they arrived in. --gnu. */
2195 register struct symtab *s;
2196 register struct symtab *prev;
2197 register struct partial_symtab *ps;
2198 struct blockvector *bv;
2201 /* We only wack things if the symbol-reload switch is set. */
2202 if (!symbol_reloading)
2205 /* Some symbol formats have trouble providing file names... */
2206 if (name == 0 || *name == '\0')
2209 /* Look for a psymtab with the specified name. */
2212 for (ps = partial_symtab_list; ps; ps = ps->next)
2214 if (STREQ (name, ps->filename))
2216 cashier_psymtab (ps); /* Blow it away...and its little dog, too. */
2217 goto again2; /* Must restart, chain has been munged */
2221 /* Look for a symtab with the specified name. */
2223 for (s = symtab_list; s; s = s->next)
2225 if (STREQ (name, s->filename))
2232 if (s == symtab_list)
2233 symtab_list = s->next;
2235 prev->next = s->next;
2237 /* For now, queue a delete for all breakpoints, displays, etc., whether
2238 or not they depend on the symtab being freed. This should be
2239 changed so that only those data structures affected are deleted. */
2241 /* But don't delete anything if the symtab is empty.
2242 This test is necessary due to a bug in "dbxread.c" that
2243 causes empty symtabs to be created for N_SO symbols that
2244 contain the pathname of the object file. (This problem
2245 has been fixed in GDB 3.9x). */
2247 bv = BLOCKVECTOR (s);
2248 if (BLOCKVECTOR_NBLOCKS (bv) > 2
2249 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK))
2250 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)))
2252 complain (&oldsyms_complaint, name);
2254 clear_symtab_users_queued++;
2255 make_cleanup (clear_symtab_users_once, 0);
2260 complain (&empty_symtab_complaint, name);
2267 /* It is still possible that some breakpoints will be affected
2268 even though no symtab was found, since the file might have
2269 been compiled without debugging, and hence not be associated
2270 with a symtab. In order to handle this correctly, we would need
2271 to keep a list of text address ranges for undebuggable files.
2272 For now, we do nothing, since this is a fairly obscure case. */
2276 /* FIXME, what about the minimal symbol table? */
2283 /* Allocate and partially fill a partial symtab. It will be
2284 completely filled at the end of the symbol list.
2286 FILENAME is the name of the symbol-file we are reading from. */
2288 struct partial_symtab *
2289 start_psymtab_common (objfile, section_offsets,
2290 filename, textlow, global_syms, static_syms)
2291 struct objfile *objfile;
2292 struct section_offsets *section_offsets;
2295 struct partial_symbol **global_syms;
2296 struct partial_symbol **static_syms;
2298 struct partial_symtab *psymtab;
2300 psymtab = allocate_psymtab (filename, objfile);
2301 psymtab->section_offsets = section_offsets;
2302 psymtab->textlow = textlow;
2303 psymtab->texthigh = psymtab->textlow; /* default */
2304 psymtab->globals_offset = global_syms - objfile->global_psymbols.list;
2305 psymtab->statics_offset = static_syms - objfile->static_psymbols.list;
2309 /* Add a symbol with a long value to a psymtab.
2310 Since one arg is a struct, we pass in a ptr and deref it (sigh). */
2313 add_psymbol_to_list (name, namelength, namespace, class, list, val, coreaddr,
2317 namespace_enum namespace;
2318 enum address_class class;
2319 struct psymbol_allocation_list *list;
2320 long val; /* Value as a long */
2321 CORE_ADDR coreaddr; /* Value as a CORE_ADDR */
2322 enum language language;
2323 struct objfile *objfile;
2325 register struct partial_symbol *psym;
2326 char *buf = alloca (namelength + 1);
2327 /* psymbol is static so that there will be no uninitialized gaps in the
2328 structure which might contain random data, causing cache misses in
2330 static struct partial_symbol psymbol;
2332 /* Create local copy of the partial symbol */
2333 memcpy (buf, name, namelength);
2334 buf[namelength] = '\0';
2335 SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, &objfile->psymbol_cache);
2336 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2339 SYMBOL_VALUE (&psymbol) = val;
2343 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
2345 SYMBOL_SECTION (&psymbol) = 0;
2346 SYMBOL_LANGUAGE (&psymbol) = language;
2347 PSYMBOL_NAMESPACE (&psymbol) = namespace;
2348 PSYMBOL_CLASS (&psymbol) = class;
2349 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language);
2351 /* Stash the partial symbol away in the cache */
2352 psym = bcache (&psymbol, sizeof (struct partial_symbol), &objfile->psymbol_cache);
2354 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2355 if (list->next >= list->list + list->size)
2357 extend_psymbol_list (list, objfile);
2359 *list->next++ = psym;
2360 OBJSTAT (objfile, n_psyms++);
2363 /* Add a symbol with a long value to a psymtab. This differs from
2364 * add_psymbol_to_list above in taking both a mangled and a demangled
2368 add_psymbol_with_dem_name_to_list (name, namelength, dem_name, dem_namelength,
2369 namespace, class, list, val, coreaddr, language, objfile)
2374 namespace_enum namespace;
2375 enum address_class class;
2376 struct psymbol_allocation_list *list;
2377 long val; /* Value as a long */
2378 CORE_ADDR coreaddr; /* Value as a CORE_ADDR */
2379 enum language language;
2380 struct objfile *objfile;
2382 register struct partial_symbol *psym;
2383 char *buf = alloca (namelength + 1);
2384 /* psymbol is static so that there will be no uninitialized gaps in the
2385 structure which might contain random data, causing cache misses in
2387 static struct partial_symbol psymbol;
2389 /* Create local copy of the partial symbol */
2391 memcpy (buf, name, namelength);
2392 buf[namelength] = '\0';
2393 SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, &objfile->psymbol_cache);
2395 buf = alloca (dem_namelength + 1);
2396 memcpy (buf, dem_name, dem_namelength);
2397 buf[dem_namelength] = '\0';
2402 case language_cplus:
2403 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol) =
2404 bcache (buf, dem_namelength + 1, &objfile->psymbol_cache);
2406 case language_chill:
2407 SYMBOL_CHILL_DEMANGLED_NAME (&psymbol) =
2408 bcache (buf, dem_namelength + 1, &objfile->psymbol_cache);
2410 /* FIXME What should be done for the default case? Ignoring for now. */
2413 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2416 SYMBOL_VALUE (&psymbol) = val;
2420 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
2422 SYMBOL_SECTION (&psymbol) = 0;
2423 SYMBOL_LANGUAGE (&psymbol) = language;
2424 PSYMBOL_NAMESPACE (&psymbol) = namespace;
2425 PSYMBOL_CLASS (&psymbol) = class;
2426 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language);
2428 /* Stash the partial symbol away in the cache */
2429 psym = bcache (&psymbol, sizeof (struct partial_symbol), &objfile->psymbol_cache);
2431 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2432 if (list->next >= list->list + list->size)
2434 extend_psymbol_list (list, objfile);
2436 *list->next++ = psym;
2437 OBJSTAT (objfile, n_psyms++);
2440 /* Initialize storage for partial symbols. */
2443 init_psymbol_list (objfile, total_symbols)
2444 struct objfile *objfile;
2447 /* Free any previously allocated psymbol lists. */
2449 if (objfile->global_psymbols.list)
2451 mfree (objfile->md, (PTR) objfile->global_psymbols.list);
2453 if (objfile->static_psymbols.list)
2455 mfree (objfile->md, (PTR) objfile->static_psymbols.list);
2458 /* Current best guess is that approximately a twentieth
2459 of the total symbols (in a debugging file) are global or static
2462 objfile->global_psymbols.size = total_symbols / 10;
2463 objfile->static_psymbols.size = total_symbols / 10;
2465 if (objfile->global_psymbols.size > 0)
2467 objfile->global_psymbols.next =
2468 objfile->global_psymbols.list = (struct partial_symbol **)
2469 xmmalloc (objfile->md, (objfile->global_psymbols.size
2470 * sizeof (struct partial_symbol *)));
2472 if (objfile->static_psymbols.size > 0)
2474 objfile->static_psymbols.next =
2475 objfile->static_psymbols.list = (struct partial_symbol **)
2476 xmmalloc (objfile->md, (objfile->static_psymbols.size
2477 * sizeof (struct partial_symbol *)));
2482 The following code implements an abstraction for debugging overlay sections.
2484 The target model is as follows:
2485 1) The gnu linker will permit multiple sections to be mapped into the
2486 same VMA, each with its own unique LMA (or load address).
2487 2) It is assumed that some runtime mechanism exists for mapping the
2488 sections, one by one, from the load address into the VMA address.
2489 3) This code provides a mechanism for gdb to keep track of which
2490 sections should be considered to be mapped from the VMA to the LMA.
2491 This information is used for symbol lookup, and memory read/write.
2492 For instance, if a section has been mapped then its contents
2493 should be read from the VMA, otherwise from the LMA.
2495 Two levels of debugger support for overlays are available. One is
2496 "manual", in which the debugger relies on the user to tell it which
2497 overlays are currently mapped. This level of support is
2498 implemented entirely in the core debugger, and the information about
2499 whether a section is mapped is kept in the objfile->obj_section table.
2501 The second level of support is "automatic", and is only available if
2502 the target-specific code provides functionality to read the target's
2503 overlay mapping table, and translate its contents for the debugger
2504 (by updating the mapped state information in the obj_section tables).
2506 The interface is as follows:
2508 overlay map <name> -- tell gdb to consider this section mapped
2509 overlay unmap <name> -- tell gdb to consider this section unmapped
2510 overlay list -- list the sections that GDB thinks are mapped
2511 overlay read-target -- get the target's state of what's mapped
2512 overlay off/manual/auto -- set overlay debugging state
2513 Functional interface:
2514 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2515 section, return that section.
2516 find_pc_overlay(pc): find any overlay section that contains
2517 the pc, either in its VMA or its LMA
2518 overlay_is_mapped(sect): true if overlay is marked as mapped
2519 section_is_overlay(sect): true if section's VMA != LMA
2520 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2521 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2522 overlay_mapped_address(...): map an address from section's LMA to VMA
2523 overlay_unmapped_address(...): map an address from section's VMA to LMA
2524 symbol_overlayed_address(...): Return a "current" address for symbol:
2525 either in VMA or LMA depending on whether
2526 the symbol's section is currently mapped
2529 /* Overlay debugging state: */
2531 int overlay_debugging = 0; /* 0 == off, 1 == manual, -1 == auto */
2532 int overlay_cache_invalid = 0; /* True if need to refresh mapped state */
2534 /* Target vector for refreshing overlay mapped state */
2535 static void simple_overlay_update PARAMS ((struct obj_section *));
2536 void (*target_overlay_update) PARAMS ((struct obj_section *))
2537 = simple_overlay_update;
2539 /* Function: section_is_overlay (SECTION)
2540 Returns true if SECTION has VMA not equal to LMA, ie.
2541 SECTION is loaded at an address different from where it will "run". */
2544 section_is_overlay (section)
2547 if (overlay_debugging)
2548 if (section && section->lma != 0 &&
2549 section->vma != section->lma)
2555 /* Function: overlay_invalidate_all (void)
2556 Invalidate the mapped state of all overlay sections (mark it as stale). */
2559 overlay_invalidate_all ()
2561 struct objfile *objfile;
2562 struct obj_section *sect;
2564 ALL_OBJSECTIONS (objfile, sect)
2565 if (section_is_overlay (sect->the_bfd_section))
2566 sect->ovly_mapped = -1;
2569 /* Function: overlay_is_mapped (SECTION)
2570 Returns true if section is an overlay, and is currently mapped.
2571 Private: public access is thru function section_is_mapped.
2573 Access to the ovly_mapped flag is restricted to this function, so
2574 that we can do automatic update. If the global flag
2575 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2576 overlay_invalidate_all. If the mapped state of the particular
2577 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2580 overlay_is_mapped (osect)
2581 struct obj_section *osect;
2583 if (osect == 0 || !section_is_overlay (osect->the_bfd_section))
2586 switch (overlay_debugging)
2590 return 0; /* overlay debugging off */
2591 case -1: /* overlay debugging automatic */
2592 /* Unles there is a target_overlay_update function,
2593 there's really nothing useful to do here (can't really go auto) */
2594 if (target_overlay_update)
2596 if (overlay_cache_invalid)
2598 overlay_invalidate_all ();
2599 overlay_cache_invalid = 0;
2601 if (osect->ovly_mapped == -1)
2602 (*target_overlay_update) (osect);
2604 /* fall thru to manual case */
2605 case 1: /* overlay debugging manual */
2606 return osect->ovly_mapped == 1;
2610 /* Function: section_is_mapped
2611 Returns true if section is an overlay, and is currently mapped. */
2614 section_is_mapped (section)
2617 struct objfile *objfile;
2618 struct obj_section *osect;
2620 if (overlay_debugging)
2621 if (section && section_is_overlay (section))
2622 ALL_OBJSECTIONS (objfile, osect)
2623 if (osect->the_bfd_section == section)
2624 return overlay_is_mapped (osect);
2629 /* Function: pc_in_unmapped_range
2630 If PC falls into the lma range of SECTION, return true, else false. */
2633 pc_in_unmapped_range (pc, section)
2639 if (overlay_debugging)
2640 if (section && section_is_overlay (section))
2642 size = bfd_get_section_size_before_reloc (section);
2643 if (section->lma <= pc && pc < section->lma + size)
2649 /* Function: pc_in_mapped_range
2650 If PC falls into the vma range of SECTION, return true, else false. */
2653 pc_in_mapped_range (pc, section)
2659 if (overlay_debugging)
2660 if (section && section_is_overlay (section))
2662 size = bfd_get_section_size_before_reloc (section);
2663 if (section->vma <= pc && pc < section->vma + size)
2669 /* Function: overlay_unmapped_address (PC, SECTION)
2670 Returns the address corresponding to PC in the unmapped (load) range.
2671 May be the same as PC. */
2674 overlay_unmapped_address (pc, section)
2678 if (overlay_debugging)
2679 if (section && section_is_overlay (section) &&
2680 pc_in_mapped_range (pc, section))
2681 return pc + section->lma - section->vma;
2686 /* Function: overlay_mapped_address (PC, SECTION)
2687 Returns the address corresponding to PC in the mapped (runtime) range.
2688 May be the same as PC. */
2691 overlay_mapped_address (pc, section)
2695 if (overlay_debugging)
2696 if (section && section_is_overlay (section) &&
2697 pc_in_unmapped_range (pc, section))
2698 return pc + section->vma - section->lma;
2704 /* Function: symbol_overlayed_address
2705 Return one of two addresses (relative to the VMA or to the LMA),
2706 depending on whether the section is mapped or not. */
2709 symbol_overlayed_address (address, section)
2713 if (overlay_debugging)
2715 /* If the symbol has no section, just return its regular address. */
2718 /* If the symbol's section is not an overlay, just return its address */
2719 if (!section_is_overlay (section))
2721 /* If the symbol's section is mapped, just return its address */
2722 if (section_is_mapped (section))
2725 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
2726 * then return its LOADED address rather than its vma address!!
2728 return overlay_unmapped_address (address, section);
2733 /* Function: find_pc_overlay (PC)
2734 Return the best-match overlay section for PC:
2735 If PC matches a mapped overlay section's VMA, return that section.
2736 Else if PC matches an unmapped section's VMA, return that section.
2737 Else if PC matches an unmapped section's LMA, return that section. */
2740 find_pc_overlay (pc)
2743 struct objfile *objfile;
2744 struct obj_section *osect, *best_match = NULL;
2746 if (overlay_debugging)
2747 ALL_OBJSECTIONS (objfile, osect)
2748 if (section_is_overlay (osect->the_bfd_section))
2750 if (pc_in_mapped_range (pc, osect->the_bfd_section))
2752 if (overlay_is_mapped (osect))
2753 return osect->the_bfd_section;
2757 else if (pc_in_unmapped_range (pc, osect->the_bfd_section))
2760 return best_match ? best_match->the_bfd_section : NULL;
2763 /* Function: find_pc_mapped_section (PC)
2764 If PC falls into the VMA address range of an overlay section that is
2765 currently marked as MAPPED, return that section. Else return NULL. */
2768 find_pc_mapped_section (pc)
2771 struct objfile *objfile;
2772 struct obj_section *osect;
2774 if (overlay_debugging)
2775 ALL_OBJSECTIONS (objfile, osect)
2776 if (pc_in_mapped_range (pc, osect->the_bfd_section) &&
2777 overlay_is_mapped (osect))
2778 return osect->the_bfd_section;
2783 /* Function: list_overlays_command
2784 Print a list of mapped sections and their PC ranges */
2787 list_overlays_command (args, from_tty)
2792 struct objfile *objfile;
2793 struct obj_section *osect;
2795 if (overlay_debugging)
2796 ALL_OBJSECTIONS (objfile, osect)
2797 if (overlay_is_mapped (osect))
2803 vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section);
2804 lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section);
2805 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
2806 name = bfd_section_name (objfile->obfd, osect->the_bfd_section);
2808 printf_filtered ("Section %s, loaded at ", name);
2809 print_address_numeric (lma, 1, gdb_stdout);
2810 puts_filtered (" - ");
2811 print_address_numeric (lma + size, 1, gdb_stdout);
2812 printf_filtered (", mapped at ");
2813 print_address_numeric (vma, 1, gdb_stdout);
2814 puts_filtered (" - ");
2815 print_address_numeric (vma + size, 1, gdb_stdout);
2816 puts_filtered ("\n");
2821 printf_filtered ("No sections are mapped.\n");
2824 /* Function: map_overlay_command
2825 Mark the named section as mapped (ie. residing at its VMA address). */
2828 map_overlay_command (args, from_tty)
2832 struct objfile *objfile, *objfile2;
2833 struct obj_section *sec, *sec2;
2836 if (!overlay_debugging)
2838 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
2839 the 'overlay manual' command.");
2841 if (args == 0 || *args == 0)
2842 error ("Argument required: name of an overlay section");
2844 /* First, find a section matching the user supplied argument */
2845 ALL_OBJSECTIONS (objfile, sec)
2846 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
2848 /* Now, check to see if the section is an overlay. */
2849 bfdsec = sec->the_bfd_section;
2850 if (!section_is_overlay (bfdsec))
2851 continue; /* not an overlay section */
2853 /* Mark the overlay as "mapped" */
2854 sec->ovly_mapped = 1;
2856 /* Next, make a pass and unmap any sections that are
2857 overlapped by this new section: */
2858 ALL_OBJSECTIONS (objfile2, sec2)
2859 if (sec2->ovly_mapped &&
2861 sec->the_bfd_section != sec2->the_bfd_section &&
2862 (pc_in_mapped_range (sec2->addr, sec->the_bfd_section) ||
2863 pc_in_mapped_range (sec2->endaddr, sec->the_bfd_section)))
2866 printf_filtered ("Note: section %s unmapped by overlap\n",
2867 bfd_section_name (objfile->obfd,
2868 sec2->the_bfd_section));
2869 sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2 */
2873 error ("No overlay section called %s", args);
2876 /* Function: unmap_overlay_command
2877 Mark the overlay section as unmapped
2878 (ie. resident in its LMA address range, rather than the VMA range). */
2881 unmap_overlay_command (args, from_tty)
2885 struct objfile *objfile;
2886 struct obj_section *sec;
2888 if (!overlay_debugging)
2890 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
2891 the 'overlay manual' command.");
2893 if (args == 0 || *args == 0)
2894 error ("Argument required: name of an overlay section");
2896 /* First, find a section matching the user supplied argument */
2897 ALL_OBJSECTIONS (objfile, sec)
2898 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
2900 if (!sec->ovly_mapped)
2901 error ("Section %s is not mapped", args);
2902 sec->ovly_mapped = 0;
2905 error ("No overlay section called %s", args);
2908 /* Function: overlay_auto_command
2909 A utility command to turn on overlay debugging.
2910 Possibly this should be done via a set/show command. */
2913 overlay_auto_command (args, from_tty)
2917 overlay_debugging = -1;
2919 printf_filtered ("Automatic overlay debugging enabled.");
2922 /* Function: overlay_manual_command
2923 A utility command to turn on overlay debugging.
2924 Possibly this should be done via a set/show command. */
2927 overlay_manual_command (args, from_tty)
2931 overlay_debugging = 1;
2933 printf_filtered ("Overlay debugging enabled.");
2936 /* Function: overlay_off_command
2937 A utility command to turn on overlay debugging.
2938 Possibly this should be done via a set/show command. */
2941 overlay_off_command (args, from_tty)
2945 overlay_debugging = 0;
2947 printf_filtered ("Overlay debugging disabled.");
2951 overlay_load_command (args, from_tty)
2955 if (target_overlay_update)
2956 (*target_overlay_update) (NULL);
2958 error ("This target does not know how to read its overlay state.");
2961 /* Function: overlay_command
2962 A place-holder for a mis-typed command */
2964 /* Command list chain containing all defined "overlay" subcommands. */
2965 struct cmd_list_element *overlaylist;
2968 overlay_command (args, from_tty)
2973 ("\"overlay\" must be followed by the name of an overlay command.\n");
2974 help_list (overlaylist, "overlay ", -1, gdb_stdout);
2978 /* Target Overlays for the "Simplest" overlay manager:
2980 This is GDB's default target overlay layer. It works with the
2981 minimal overlay manager supplied as an example by Cygnus. The
2982 entry point is via a function pointer "target_overlay_update",
2983 so targets that use a different runtime overlay manager can
2984 substitute their own overlay_update function and take over the
2987 The overlay_update function pokes around in the target's data structures
2988 to see what overlays are mapped, and updates GDB's overlay mapping with
2991 In this simple implementation, the target data structures are as follows:
2992 unsigned _novlys; /# number of overlay sections #/
2993 unsigned _ovly_table[_novlys][4] = {
2994 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
2995 {..., ..., ..., ...},
2997 unsigned _novly_regions; /# number of overlay regions #/
2998 unsigned _ovly_region_table[_novly_regions][3] = {
2999 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3002 These functions will attempt to update GDB's mappedness state in the
3003 symbol section table, based on the target's mappedness state.
3005 To do this, we keep a cached copy of the target's _ovly_table, and
3006 attempt to detect when the cached copy is invalidated. The main
3007 entry point is "simple_overlay_update(SECT), which looks up SECT in
3008 the cached table and re-reads only the entry for that section from
3009 the target (whenever possible).
3012 /* Cached, dynamically allocated copies of the target data structures: */
3013 static unsigned (*cache_ovly_table)[4] = 0;
3015 static unsigned (*cache_ovly_region_table)[3] = 0;
3017 static unsigned cache_novlys = 0;
3019 static unsigned cache_novly_regions = 0;
3021 static CORE_ADDR cache_ovly_table_base = 0;
3023 static CORE_ADDR cache_ovly_region_table_base = 0;
3027 VMA, SIZE, LMA, MAPPED
3029 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
3031 /* Throw away the cached copy of _ovly_table */
3033 simple_free_overlay_table ()
3035 if (cache_ovly_table)
3036 free (cache_ovly_table);
3038 cache_ovly_table = NULL;
3039 cache_ovly_table_base = 0;
3043 /* Throw away the cached copy of _ovly_region_table */
3045 simple_free_overlay_region_table ()
3047 if (cache_ovly_region_table)
3048 free (cache_ovly_region_table);
3049 cache_novly_regions = 0;
3050 cache_ovly_region_table = NULL;
3051 cache_ovly_region_table_base = 0;
3055 /* Read an array of ints from the target into a local buffer.
3056 Convert to host order. int LEN is number of ints */
3058 read_target_long_array (memaddr, myaddr, len)
3060 unsigned int *myaddr;
3063 char *buf = alloca (len * TARGET_LONG_BYTES);
3066 read_memory (memaddr, buf, len * TARGET_LONG_BYTES);
3067 for (i = 0; i < len; i++)
3068 myaddr[i] = extract_unsigned_integer (TARGET_LONG_BYTES * i + buf,
3072 /* Find and grab a copy of the target _ovly_table
3073 (and _novlys, which is needed for the table's size) */
3075 simple_read_overlay_table ()
3077 struct minimal_symbol *msym;
3079 simple_free_overlay_table ();
3080 msym = lookup_minimal_symbol ("_novlys", 0, 0);
3082 cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4);
3084 return 0; /* failure */
3085 cache_ovly_table = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table));
3086 if (cache_ovly_table != NULL)
3088 msym = lookup_minimal_symbol ("_ovly_table", 0, 0);
3091 cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (msym);
3092 read_target_long_array (cache_ovly_table_base,
3093 (int *) cache_ovly_table,
3097 return 0; /* failure */
3100 return 0; /* failure */
3101 return 1; /* SUCCESS */
3105 /* Find and grab a copy of the target _ovly_region_table
3106 (and _novly_regions, which is needed for the table's size) */
3108 simple_read_overlay_region_table ()
3110 struct minimal_symbol *msym;
3112 simple_free_overlay_region_table ();
3113 msym = lookup_minimal_symbol ("_novly_regions", 0, 0);
3115 cache_novly_regions = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4);
3117 return 0; /* failure */
3118 cache_ovly_region_table = (void *) xmalloc (cache_novly_regions * 12);
3119 if (cache_ovly_region_table != NULL)
3121 msym = lookup_minimal_symbol ("_ovly_region_table", 0, 0);
3124 cache_ovly_region_table_base = SYMBOL_VALUE_ADDRESS (msym);
3125 read_target_long_array (cache_ovly_region_table_base,
3126 (int *) cache_ovly_region_table,
3127 cache_novly_regions * 3);
3130 return 0; /* failure */
3133 return 0; /* failure */
3134 return 1; /* SUCCESS */
3138 /* Function: simple_overlay_update_1
3139 A helper function for simple_overlay_update. Assuming a cached copy
3140 of _ovly_table exists, look through it to find an entry whose vma,
3141 lma and size match those of OSECT. Re-read the entry and make sure
3142 it still matches OSECT (else the table may no longer be valid).
3143 Set OSECT's mapped state to match the entry. Return: 1 for
3144 success, 0 for failure. */
3147 simple_overlay_update_1 (osect)
3148 struct obj_section *osect;
3152 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
3153 for (i = 0; i < cache_novlys; i++)
3154 if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma &&
3155 cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* &&
3156 cache_ovly_table[i][SIZE] == size */ )
3158 read_target_long_array (cache_ovly_table_base + i * TARGET_LONG_BYTES,
3159 (int *) cache_ovly_table[i], 4);
3160 if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma &&
3161 cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* &&
3162 cache_ovly_table[i][SIZE] == size */ )
3164 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3167 else /* Warning! Warning! Target's ovly table has changed! */
3173 /* Function: simple_overlay_update
3174 If OSECT is NULL, then update all sections' mapped state
3175 (after re-reading the entire target _ovly_table).
3176 If OSECT is non-NULL, then try to find a matching entry in the
3177 cached ovly_table and update only OSECT's mapped state.
3178 If a cached entry can't be found or the cache isn't valid, then
3179 re-read the entire cache, and go ahead and update all sections. */
3182 simple_overlay_update (osect)
3183 struct obj_section *osect;
3185 struct objfile *objfile;
3187 /* Were we given an osect to look up? NULL means do all of them. */
3189 /* Have we got a cached copy of the target's overlay table? */
3190 if (cache_ovly_table != NULL)
3191 /* Does its cached location match what's currently in the symtab? */
3192 if (cache_ovly_table_base ==
3193 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", 0, 0)))
3194 /* Then go ahead and try to look up this single section in the cache */
3195 if (simple_overlay_update_1 (osect))
3196 /* Found it! We're done. */
3199 /* Cached table no good: need to read the entire table anew.
3200 Or else we want all the sections, in which case it's actually
3201 more efficient to read the whole table in one block anyway. */
3203 if (simple_read_overlay_table () == 0) /* read failed? No table? */
3205 warning ("Failed to read the target overlay mapping table.");
3208 /* Now may as well update all sections, even if only one was requested. */
3209 ALL_OBJSECTIONS (objfile, osect)
3210 if (section_is_overlay (osect->the_bfd_section))
3214 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
3215 for (i = 0; i < cache_novlys; i++)
3216 if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma &&
3217 cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* &&
3218 cache_ovly_table[i][SIZE] == size */ )
3219 { /* obj_section matches i'th entry in ovly_table */
3220 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3221 break; /* finished with inner for loop: break out */
3228 _initialize_symfile ()
3230 struct cmd_list_element *c;
3232 c = add_cmd ("symbol-file", class_files, symbol_file_command,
3233 "Load symbol table from executable file FILE.\n\
3234 The `file' command can also load symbol tables, as well as setting the file\n\
3235 to execute.", &cmdlist);
3236 c->completer = filename_completer;
3238 c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command,
3239 "Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3240 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3241 ADDR is the starting address of the file's text.\n\
3242 The optional arguments are section-name section-address pairs and\n\
3243 should be specified if the data and bss segments are not contiguous\n\
3244 with the text. SECT is a section name to be loaded at SECT_ADDR.",
3246 c->completer = filename_completer;
3248 c = add_cmd ("add-shared-symbol-files", class_files,
3249 add_shared_symbol_files_command,
3250 "Load the symbols from shared objects in the dynamic linker's link map.",
3252 c = add_alias_cmd ("assf", "add-shared-symbol-files", class_files, 1,
3255 c = add_cmd ("load", class_files, load_command,
3256 "Dynamically load FILE into the running program, and record its symbols\n\
3257 for access from GDB.", &cmdlist);
3258 c->completer = filename_completer;
3261 (add_set_cmd ("symbol-reloading", class_support, var_boolean,
3262 (char *) &symbol_reloading,
3263 "Set dynamic symbol table reloading multiple times in one run.",
3267 add_prefix_cmd ("overlay", class_support, overlay_command,
3268 "Commands for debugging overlays.", &overlaylist,
3269 "overlay ", 0, &cmdlist);
3271 add_com_alias ("ovly", "overlay", class_alias, 1);
3272 add_com_alias ("ov", "overlay", class_alias, 1);
3274 add_cmd ("map-overlay", class_support, map_overlay_command,
3275 "Assert that an overlay section is mapped.", &overlaylist);
3277 add_cmd ("unmap-overlay", class_support, unmap_overlay_command,
3278 "Assert that an overlay section is unmapped.", &overlaylist);
3280 add_cmd ("list-overlays", class_support, list_overlays_command,
3281 "List mappings of overlay sections.", &overlaylist);
3283 add_cmd ("manual", class_support, overlay_manual_command,
3284 "Enable overlay debugging.", &overlaylist);
3285 add_cmd ("off", class_support, overlay_off_command,
3286 "Disable overlay debugging.", &overlaylist);
3287 add_cmd ("auto", class_support, overlay_auto_command,
3288 "Enable automatic overlay debugging.", &overlaylist);
3289 add_cmd ("load-target", class_support, overlay_load_command,
3290 "Read the overlay mapping state from the target.", &overlaylist);
3292 /* Filename extension to source language lookup table: */
3293 init_filename_language_table ();
3294 c = add_set_cmd ("extension-language", class_files, var_string_noescape,
3296 "Set mapping between filename extension and source language.\n\
3297 Usage: set extension-language .foo bar",
3299 c->function.cfunc = set_ext_lang_command;
3301 add_info ("extensions", info_ext_lang_command,
3302 "All filename extensions associated with a source language.");
3305 (add_set_cmd ("download-write-size", class_obscure,
3306 var_integer, (char *) &download_write_size,
3307 "Set the write size used when downloading a program.\n"
3308 "Only used when downloading a program onto a remote\n"
3309 "target. Specify zero, or a negative value, to disable\n"
3310 "blocked writes. The actual size of each transfer is also\n"
3311 "limited by the size of the target packet and the memory\n"