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authorStan Shebs <shebs@codesourcery.com>1999-04-16 01:34:07 +0000
committerStan Shebs <shebs@codesourcery.com>1999-04-16 01:34:07 +0000
commit071ea11e85eb9d529cc5eb3d35f6247466a21b99 (patch)
tree5deda65b8d7b04d1f4cbc534c3206d328e1267ec /gdb/symfile.c
parent1730ec6b1848f0f32154277f788fb29f88d8475b (diff)
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Initial creation of sourceware repository
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-rw-r--r--gdb/symfile.c3107
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diff --git a/gdb/symfile.c b/gdb/symfile.c
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-/* Generic symbol file reading for the GNU debugger, GDB.
- Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998
- Free Software Foundation, Inc.
- Contributed by Cygnus Support, using pieces from other GDB modules.
-
-This file is part of GDB.
-
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-
-#include "defs.h"
-#include "symtab.h"
-#include "gdbtypes.h"
-#include "gdbcore.h"
-#include "frame.h"
-#include "target.h"
-#include "value.h"
-#include "symfile.h"
-#include "objfiles.h"
-#include "gdbcmd.h"
-#include "breakpoint.h"
-#include "language.h"
-#include "complaints.h"
-#include "demangle.h"
-#include "inferior.h" /* for write_pc */
-#include "gdb-stabs.h"
-#include "obstack.h"
-
-#include <assert.h>
-#include <sys/types.h>
-#include <fcntl.h>
-#include "gdb_string.h"
-#include "gdb_stat.h"
-#include <ctype.h>
-#include <time.h>
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-
-#ifndef O_BINARY
-#define O_BINARY 0
-#endif
-
-#ifdef HPUXHPPA
-extern int hpread_pxdb_check PARAMS ((bfd *, char *));
-
-/* Some HP-UX related globals to clear when a new "main"
- symbol file is loaded. HP-specific. */
-
-extern int hp_som_som_object_present;
-extern int hp_cxx_exception_support_initialized;
-#define RESET_HP_UX_GLOBALS() do {\
- hp_som_som_object_present = 0; /* indicates HP-compiled code */ \
- hp_cxx_exception_support_initialized = 0; /* must reinitialize exception stuff */ \
- } while (0)
-#endif
-
-int (*ui_load_progress_hook) PARAMS ((char *, unsigned long));
-void (*pre_add_symbol_hook) PARAMS ((char *));
-void (*post_add_symbol_hook) PARAMS ((void));
-
-/* Global variables owned by this file */
-int readnow_symbol_files; /* Read full symbols immediately */
-
-struct complaint oldsyms_complaint = {
- "Replacing old symbols for `%s'", 0, 0
-};
-
-struct complaint empty_symtab_complaint = {
- "Empty symbol table found for `%s'", 0, 0
-};
-
-/* External variables and functions referenced. */
-
-extern int info_verbose;
-
-extern void report_transfer_performance PARAMS ((unsigned long,
- time_t, time_t));
-
-/* Functions this file defines */
-
-#if 0
-static int simple_read_overlay_region_table PARAMS ((void));
-static void simple_free_overlay_region_table PARAMS ((void));
-#endif
-
-static void set_initial_language PARAMS ((void));
-
-static void load_command PARAMS ((char *, int));
-
-static void add_symbol_file_command PARAMS ((char *, int));
-
-static void add_shared_symbol_files_command PARAMS ((char *, int));
-
-static void cashier_psymtab PARAMS ((struct partial_symtab *));
-
-static int compare_psymbols PARAMS ((const void *, const void *));
-
-static int compare_symbols PARAMS ((const void *, const void *));
-
-bfd *symfile_bfd_open PARAMS ((char *));
-
-static void find_sym_fns PARAMS ((struct objfile *));
-
-static void decrement_reading_symtab PARAMS ((void *));
-
-static void overlay_invalidate_all PARAMS ((void));
-
-static int overlay_is_mapped PARAMS ((struct obj_section *));
-
-void list_overlays_command PARAMS ((char *, int));
-
-void map_overlay_command PARAMS ((char *, int));
-
-void unmap_overlay_command PARAMS ((char *, int));
-
-static void overlay_auto_command PARAMS ((char *, int));
-
-static void overlay_manual_command PARAMS ((char *, int));
-
-static void overlay_off_command PARAMS ((char *, int));
-
-static void overlay_load_command PARAMS ((char *, int));
-
-static void overlay_command PARAMS ((char *, int));
-
-static void simple_free_overlay_table PARAMS ((void));
-
-static void read_target_long_array PARAMS ((CORE_ADDR, unsigned int *, int));
-
-static int simple_read_overlay_table PARAMS ((void));
-
-static int simple_overlay_update_1 PARAMS ((struct obj_section *));
-
-void _initialize_symfile PARAMS ((void));
-
-/* List of all available sym_fns. On gdb startup, each object file reader
- calls add_symtab_fns() to register information on each format it is
- prepared to read. */
-
-static struct sym_fns *symtab_fns = NULL;
-
-/* Flag for whether user will be reloading symbols multiple times.
- Defaults to ON for VxWorks, otherwise OFF. */
-
-#ifdef SYMBOL_RELOADING_DEFAULT
-int symbol_reloading = SYMBOL_RELOADING_DEFAULT;
-#else
-int symbol_reloading = 0;
-#endif
-
-/* If non-zero, then on HP-UX (i.e., platforms that use somsolib.c),
- this variable is interpreted as a threshhold. If adding a new
- library's symbol table to those already known to the debugger would
- exceed this threshhold, then the shlib's symbols are not added.
-
- If non-zero on other platforms, shared library symbols will be added
- automatically when the inferior is created, new libraries are loaded,
- or when attaching to the inferior. This is almost always what users
- will want to have happen; but for very large programs, the startup
- time will be excessive, and so if this is a problem, the user can
- clear this flag and then add the shared library symbols as needed.
- Note that there is a potential for confusion, since if the shared
- library symbols are not loaded, commands like "info fun" will *not*
- report all the functions that are actually present.
-
- Note that HP-UX interprets this variable to mean, "threshhold size
- in megabytes, where zero means never add". Other platforms interpret
- this variable to mean, "always add if non-zero, never add if zero."
- */
-
-int auto_solib_add = 1;
-
-
-/* Since this function is called from within qsort, in an ANSI environment
- it must conform to the prototype for qsort, which specifies that the
- comparison function takes two "void *" pointers. */
-
-static int
-compare_symbols (s1p, s2p)
- const PTR s1p;
- const PTR s2p;
-{
- register struct symbol **s1, **s2;
-
- s1 = (struct symbol **) s1p;
- s2 = (struct symbol **) s2p;
-
- return (STRCMP (SYMBOL_NAME (*s1), SYMBOL_NAME (*s2)));
-}
-
-/*
-
-LOCAL FUNCTION
-
- compare_psymbols -- compare two partial symbols by name
-
-DESCRIPTION
-
- Given pointers to pointers to two partial symbol table entries,
- compare them by name and return -N, 0, or +N (ala strcmp).
- Typically used by sorting routines like qsort().
-
-NOTES
-
- Does direct compare of first two characters before punting
- and passing to strcmp for longer compares. Note that the
- original version had a bug whereby two null strings or two
- identically named one character strings would return the
- comparison of memory following the null byte.
-
- */
-
-static int
-compare_psymbols (s1p, s2p)
- const PTR s1p;
- const PTR s2p;
-{
- register char *st1 = SYMBOL_NAME (*(struct partial_symbol **) s1p);
- register char *st2 = SYMBOL_NAME (*(struct partial_symbol **) s2p);
-
- if ((st1[0] - st2[0]) || !st1[0])
- {
- return (st1[0] - st2[0]);
- }
- else if ((st1[1] - st2[1]) || !st1[1])
- {
- return (st1[1] - st2[1]);
- }
- else
- {
- /* Note: I replaced the STRCMP line (commented out below)
- * with a simpler "strcmp()" which compares the 2 strings
- * from the beginning. (STRCMP is a macro which first compares
- * the initial characters, then falls back on strcmp).
- * The reason is that the STRCMP line was tickling a C compiler
- * bug on HP-UX 10.30, which is avoided with the simpler
- * code. The performance gain from the more complicated code
- * is negligible, given that we have already checked the
- * initial 2 characters above. I reported the compiler bug,
- * and once it is fixed the original line can be put back. RT
- */
- /* return ( STRCMP (st1 + 2, st2 + 2)); */
- return ( strcmp (st1, st2));
- }
-}
-
-void
-sort_pst_symbols (pst)
- struct partial_symtab *pst;
-{
- /* Sort the global list; don't sort the static list */
-
- qsort (pst -> objfile -> global_psymbols.list + pst -> globals_offset,
- pst -> n_global_syms, sizeof (struct partial_symbol *),
- compare_psymbols);
-}
-
-/* Call sort_block_syms to sort alphabetically the symbols of one block. */
-
-void
-sort_block_syms (b)
- register struct block *b;
-{
- qsort (&BLOCK_SYM (b, 0), BLOCK_NSYMS (b),
- sizeof (struct symbol *), compare_symbols);
-}
-
-/* Call sort_symtab_syms to sort alphabetically
- the symbols of each block of one symtab. */
-
-void
-sort_symtab_syms (s)
- register struct symtab *s;
-{
- register struct blockvector *bv;
- int nbl;
- int i;
- register struct block *b;
-
- if (s == 0)
- return;
- bv = BLOCKVECTOR (s);
- nbl = BLOCKVECTOR_NBLOCKS (bv);
- for (i = 0; i < nbl; i++)
- {
- b = BLOCKVECTOR_BLOCK (bv, i);
- if (BLOCK_SHOULD_SORT (b))
- sort_block_syms (b);
- }
-}
-
-/* Make a null terminated copy of the string at PTR with SIZE characters in
- the obstack pointed to by OBSTACKP . Returns the address of the copy.
- Note that the string at PTR does not have to be null terminated, I.E. it
- may be part of a larger string and we are only saving a substring. */
-
-char *
-obsavestring (ptr, size, obstackp)
- char *ptr;
- int size;
- struct obstack *obstackp;
-{
- register char *p = (char *) obstack_alloc (obstackp, size + 1);
- /* Open-coded memcpy--saves function call time. These strings are usually
- short. FIXME: Is this really still true with a compiler that can
- inline memcpy? */
- {
- register char *p1 = ptr;
- register char *p2 = p;
- char *end = ptr + size;
- while (p1 != end)
- *p2++ = *p1++;
- }
- p[size] = 0;
- return p;
-}
-
-/* Concatenate strings S1, S2 and S3; return the new string. Space is found
- in the obstack pointed to by OBSTACKP. */
-
-char *
-obconcat (obstackp, s1, s2, s3)
- struct obstack *obstackp;
- const char *s1, *s2, *s3;
-{
- register int len = strlen (s1) + strlen (s2) + strlen (s3) + 1;
- register char *val = (char *) obstack_alloc (obstackp, len);
- strcpy (val, s1);
- strcat (val, s2);
- strcat (val, s3);
- return val;
-}
-
-/* True if we are nested inside psymtab_to_symtab. */
-
-int currently_reading_symtab = 0;
-
-static void
-decrement_reading_symtab (dummy)
- void *dummy;
-{
- currently_reading_symtab--;
-}
-
-/* Get the symbol table that corresponds to a partial_symtab.
- This is fast after the first time you do it. In fact, there
- is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
- case inline. */
-
-struct symtab *
-psymtab_to_symtab (pst)
- register struct partial_symtab *pst;
-{
- /* If it's been looked up before, return it. */
- if (pst->symtab)
- return pst->symtab;
-
- /* If it has not yet been read in, read it. */
- if (!pst->readin)
- {
- struct cleanup *back_to = make_cleanup (decrement_reading_symtab, NULL);
- currently_reading_symtab++;
- (*pst->read_symtab) (pst);
- do_cleanups (back_to);
- }
-
- return pst->symtab;
-}
-
-/* Initialize entry point information for this objfile. */
-
-void
-init_entry_point_info (objfile)
- struct objfile *objfile;
-{
- /* Save startup file's range of PC addresses to help blockframe.c
- decide where the bottom of the stack is. */
-
- if (bfd_get_file_flags (objfile -> obfd) & EXEC_P)
- {
- /* Executable file -- record its entry point so we'll recognize
- the startup file because it contains the entry point. */
- objfile -> ei.entry_point = bfd_get_start_address (objfile -> obfd);
- }
- else
- {
- /* Examination of non-executable.o files. Short-circuit this stuff. */
- objfile -> ei.entry_point = INVALID_ENTRY_POINT;
- }
- objfile -> ei.entry_file_lowpc = INVALID_ENTRY_LOWPC;
- objfile -> ei.entry_file_highpc = INVALID_ENTRY_HIGHPC;
- objfile -> ei.entry_func_lowpc = INVALID_ENTRY_LOWPC;
- objfile -> ei.entry_func_highpc = INVALID_ENTRY_HIGHPC;
- objfile -> ei.main_func_lowpc = INVALID_ENTRY_LOWPC;
- objfile -> ei.main_func_highpc = INVALID_ENTRY_HIGHPC;
-}
-
-/* Get current entry point address. */
-
-CORE_ADDR
-entry_point_address()
-{
- return symfile_objfile ? symfile_objfile->ei.entry_point : 0;
-}
-
-/* Remember the lowest-addressed loadable section we've seen.
- This function is called via bfd_map_over_sections.
-
- In case of equal vmas, the section with the largest size becomes the
- lowest-addressed loadable section.
-
- If the vmas and sizes are equal, the last section is considered the
- lowest-addressed loadable section. */
-
-void
-find_lowest_section (abfd, sect, obj)
- bfd *abfd;
- asection *sect;
- PTR obj;
-{
- asection **lowest = (asection **)obj;
-
- if (0 == (bfd_get_section_flags (abfd, sect) & SEC_LOAD))
- return;
- if (!*lowest)
- *lowest = sect; /* First loadable section */
- else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect))
- *lowest = sect; /* A lower loadable section */
- else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect)
- && (bfd_section_size (abfd, (*lowest))
- <= bfd_section_size (abfd, sect)))
- *lowest = sect;
-}
-
-/* Parse the user's idea of an offset for dynamic linking, into our idea
- of how to represent it for fast symbol reading. This is the default
- version of the sym_fns.sym_offsets function for symbol readers that
- don't need to do anything special. It allocates a section_offsets table
- for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
-
-struct section_offsets *
-default_symfile_offsets (objfile, addr)
- struct objfile *objfile;
- CORE_ADDR addr;
-{
- struct section_offsets *section_offsets;
- int i;
-
- objfile->num_sections = SECT_OFF_MAX;
- section_offsets = (struct section_offsets *)
- obstack_alloc (&objfile -> psymbol_obstack, SIZEOF_SECTION_OFFSETS);
-
- for (i = 0; i < SECT_OFF_MAX; i++)
- ANOFFSET (section_offsets, i) = addr;
-
- return section_offsets;
-}
-
-
-/* Process a symbol file, as either the main file or as a dynamically
- loaded file.
-
- NAME is the file name (which will be tilde-expanded and made
- absolute herein) (but we don't free or modify NAME itself).
- FROM_TTY says how verbose to be. MAINLINE specifies whether this
- is the main symbol file, or whether it's an extra symbol file such
- as dynamically loaded code. If !mainline, ADDR is the address
- where the text segment was loaded. If VERBO, the caller has printed
- a verbose message about the symbol reading (and complaints can be
- more terse about it). */
-
-void
-syms_from_objfile (objfile, addr, mainline, verbo)
- struct objfile *objfile;
- CORE_ADDR addr;
- int mainline;
- int verbo;
-{
- struct section_offsets *section_offsets;
- asection *lowest_sect;
- struct cleanup *old_chain;
-
- init_entry_point_info (objfile);
- find_sym_fns (objfile);
-
- /* Make sure that partially constructed symbol tables will be cleaned up
- if an error occurs during symbol reading. */
- old_chain = make_cleanup ((make_cleanup_func) free_objfile, objfile);
-
- if (mainline)
- {
- /* We will modify the main symbol table, make sure that all its users
- will be cleaned up if an error occurs during symbol reading. */
- make_cleanup ((make_cleanup_func) clear_symtab_users, 0);
-
- /* Since no error yet, throw away the old symbol table. */
-
- if (symfile_objfile != NULL)
- {
- free_objfile (symfile_objfile);
- symfile_objfile = NULL;
- }
-
- /* Currently we keep symbols from the add-symbol-file command.
- If the user wants to get rid of them, they should do "symbol-file"
- without arguments first. Not sure this is the best behavior
- (PR 2207). */
-
- (*objfile -> sf -> sym_new_init) (objfile);
- }
-
- /* Convert addr into an offset rather than an absolute address.
- We find the lowest address of a loaded segment in the objfile,
- and assume that <addr> is where that got loaded. Due to historical
- precedent, we warn if that doesn't happen to be a text segment. */
-
- if (mainline)
- {
- addr = 0; /* No offset from objfile addresses. */
- }
- else
- {
- lowest_sect = bfd_get_section_by_name (objfile->obfd, ".text");
- if (lowest_sect == NULL)
- bfd_map_over_sections (objfile->obfd, find_lowest_section,
- (PTR) &lowest_sect);
-
- if (lowest_sect == NULL)
- warning ("no loadable sections found in added symbol-file %s",
- objfile->name);
- else if ((bfd_get_section_flags (objfile->obfd, lowest_sect) & SEC_CODE)
- == 0)
- /* FIXME-32x64--assumes bfd_vma fits in long. */
- warning ("Lowest section in %s is %s at 0x%lx",
- objfile->name,
- bfd_section_name (objfile->obfd, lowest_sect),
- (unsigned long) bfd_section_vma (objfile->obfd, lowest_sect));
-
- if (lowest_sect)
- addr -= bfd_section_vma (objfile->obfd, lowest_sect);
- }
-
- /* Initialize symbol reading routines for this objfile, allow complaints to
- appear for this new file, and record how verbose to be, then do the
- initial symbol reading for this file. */
-
- (*objfile -> sf -> sym_init) (objfile);
- clear_complaints (1, verbo);
-
- section_offsets = (*objfile -> sf -> sym_offsets) (objfile, addr);
- objfile->section_offsets = section_offsets;
-
-#ifndef IBM6000_TARGET
- /* This is a SVR4/SunOS specific hack, I think. In any event, it
- screws RS/6000. sym_offsets should be doing this sort of thing,
- because it knows the mapping between bfd sections and
- section_offsets. */
- /* This is a hack. As far as I can tell, section offsets are not
- target dependent. They are all set to addr with a couple of
- exceptions. The exceptions are sysvr4 shared libraries, whose
- offsets are kept in solib structures anyway and rs6000 xcoff
- which handles shared libraries in a completely unique way.
-
- Section offsets are built similarly, except that they are built
- by adding addr in all cases because there is no clear mapping
- from section_offsets into actual sections. Note that solib.c
- has a different algorythm for finding section offsets.
-
- These should probably all be collapsed into some target
- independent form of shared library support. FIXME. */
-
- if (addr)
- {
- struct obj_section *s;
-
- for (s = objfile->sections; s < objfile->sections_end; ++s)
- {
- s->addr -= s->offset;
- s->addr += addr;
- s->endaddr -= s->offset;
- s->endaddr += addr;
- s->offset += addr;
- }
- }
-#endif /* not IBM6000_TARGET */
-
- (*objfile -> sf -> sym_read) (objfile, section_offsets, mainline);
-
- if (!have_partial_symbols () && !have_full_symbols ())
- {
- wrap_here ("");
- printf_filtered ("(no debugging symbols found)...");
- wrap_here ("");
- }
-
- /* Don't allow char * to have a typename (else would get caddr_t).
- Ditto void *. FIXME: Check whether this is now done by all the
- symbol readers themselves (many of them now do), and if so remove
- it from here. */
-
- TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0;
- TYPE_NAME (lookup_pointer_type (builtin_type_void)) = 0;
-
- /* Mark the objfile has having had initial symbol read attempted. Note
- that this does not mean we found any symbols... */
-
- objfile -> flags |= OBJF_SYMS;
-
- /* Discard cleanups as symbol reading was successful. */
-
- discard_cleanups (old_chain);
-
-/* Call this after reading in a new symbol table to give target dependant code
- a crack at the new symbols. For instance, this could be used to update the
- values of target-specific symbols GDB needs to keep track of (such as
- _sigtramp, or whatever). */
-
- TARGET_SYMFILE_POSTREAD (objfile);
-}
-
-/* Perform required actions after either reading in the initial
- symbols for a new objfile, or mapping in the symbols from a reusable
- objfile. */
-
-void
-new_symfile_objfile (objfile, mainline, verbo)
- struct objfile *objfile;
- int mainline;
- int verbo;
-{
-
- /* If this is the main symbol file we have to clean up all users of the
- old main symbol file. Otherwise it is sufficient to fixup all the
- breakpoints that may have been redefined by this symbol file. */
- if (mainline)
- {
- /* OK, make it the "real" symbol file. */
- symfile_objfile = objfile;
-
- clear_symtab_users ();
- }
- else
- {
- breakpoint_re_set ();
- }
-
- /* We're done reading the symbol file; finish off complaints. */
- clear_complaints (0, verbo);
-}
-
-/* Process a symbol file, as either the main file or as a dynamically
- loaded file.
-
- NAME is the file name (which will be tilde-expanded and made
- absolute herein) (but we don't free or modify NAME itself).
- FROM_TTY says how verbose to be. MAINLINE specifies whether this
- is the main symbol file, or whether it's an extra symbol file such
- as dynamically loaded code. If !mainline, ADDR is the address
- where the text segment was loaded.
-
- USER_LOADED is TRUE if the add-symbol-file command was how this
- symbol file came to be processed.
-
- IS_SOLIB is TRUE if this symbol file represents a solib, as discovered
- by the target's implementation of the solib package.
-
- Upon success, returns a pointer to the objfile that was added.
- Upon failure, jumps back to command level (never returns). */
-
-struct objfile *
-symbol_file_add (name, from_tty, addr, mainline, mapped, readnow, user_loaded, is_solib)
- char *name;
- int from_tty;
- CORE_ADDR addr;
- int mainline;
- int mapped;
- int readnow;
- int user_loaded;
- int is_solib;
-{
- struct objfile *objfile;
- struct partial_symtab *psymtab;
- bfd *abfd;
-
- /* Open a bfd for the file, and give user a chance to burp if we'd be
- interactively wiping out any existing symbols. */
-
- abfd = symfile_bfd_open (name);
-
-#if 0
-#ifdef GDB_TARGET_IS_HPPA
-{
- /********* TARGET SPECIFIC CODE (HACK!) **********
- *
- * The following code is HP-specific. The "right" way of
- * doing this is unknown, but we bet would involve a target-
- * specific pre-file-load check using a generic mechanism.
- */
- /* elz: I moved this code from inside the symfile_bfd_open function
- this way we don't have to worry about recursion.
- I also have taken out the call to pxdb from within the check
- for pxdb processing. Seemed two logically unrelated things,
- and I needed a pure checking later on anyway.
- */
-
- if( hpread_pxdb_needed( abfd ))
- {
- /*
- * This file has not been pre-processed.
- * Preprocess now
- */
-
- if (hpread_call_pxdb(name))
- {
- /* The
- * call above has used "system" to pre-process
- * the on-disk file, so we now need to close
- * and re-open the file.
- */
- bfd_close (abfd); /* This also closes 'desc', */
- /* hence the recursion. */
- abfd = symfile_bfd_open( name );
- }
- else /* we fail miserably without pxdb!!!*/
- /* the warning to the user has already been given
- from within the call_pxdb function
- */
- error("Command ignored.\n");
- }
-}
- /*************** END HACK ********************/
-#endif
-#endif /* 0 */
-
-
- if ((have_full_symbols () || have_partial_symbols ())
- && mainline
- && from_tty
- && !query ("Load new symbol table from \"%s\"? ", name))
- error ("Not confirmed.");
-
- objfile = allocate_objfile (abfd, mapped, user_loaded, is_solib);
-
- /* If the objfile uses a mapped symbol file, and we have a psymtab for
- it, then skip reading any symbols at this time. */
-
- if ((objfile -> flags & OBJF_MAPPED) && (objfile -> flags & OBJF_SYMS))
- {
- /* We mapped in an existing symbol table file that already has had
- initial symbol reading performed, so we can skip that part. Notify
- the user that instead of reading the symbols, they have been mapped.
- */
- if (from_tty || info_verbose)
- {
- printf_filtered ("Mapped symbols for %s...", name);
- wrap_here ("");
- gdb_flush (gdb_stdout);
- }
- init_entry_point_info (objfile);
- find_sym_fns (objfile);
- }
- else
- {
- /* We either created a new mapped symbol table, mapped an existing
- symbol table file which has not had initial symbol reading
- performed, or need to read an unmapped symbol table. */
- if (from_tty || info_verbose)
- {
- if (pre_add_symbol_hook)
- pre_add_symbol_hook (name);
- else
- {
- printf_filtered ("Reading symbols from %s...", name);
- wrap_here ("");
- gdb_flush (gdb_stdout);
- }
- }
- syms_from_objfile (objfile, addr, mainline, from_tty);
- }
-
- /* We now have at least a partial symbol table. Check to see if the
- user requested that all symbols be read on initial access via either
- the gdb startup command line or on a per symbol file basis. Expand
- all partial symbol tables for this objfile if so. */
-
- if (readnow || readnow_symbol_files)
- {
- if (from_tty || info_verbose)
- {
- printf_filtered ("expanding to full symbols...");
- wrap_here ("");
- gdb_flush (gdb_stdout);
- }
-
- for (psymtab = objfile -> psymtabs;
- psymtab != NULL;
- psymtab = psymtab -> next)
- {
- psymtab_to_symtab (psymtab);
- }
- }
-
- if (from_tty || info_verbose)
- {
- if (post_add_symbol_hook)
- post_add_symbol_hook ();
- else
- {
- printf_filtered ("done.\n");
- gdb_flush (gdb_stdout);
- }
- }
-
- new_symfile_objfile (objfile, mainline, from_tty);
-
- target_new_objfile (objfile);
-
- return (objfile);
-}
-
-/* This is the symbol-file command. Read the file, analyze its
- symbols, and add a struct symtab to a symtab list. The syntax of
- the command is rather bizarre--(1) buildargv implements various
- quoting conventions which are undocumented and have little or
- nothing in common with the way things are quoted (or not quoted)
- elsewhere in GDB, (2) options are used, which are not generally
- used in GDB (perhaps "set mapped on", "set readnow on" would be
- better), (3) the order of options matters, which is contrary to GNU
- conventions (because it is confusing and inconvenient). */
-
-void
-symbol_file_command (args, from_tty)
- char *args;
- int from_tty;
-{
- char **argv;
- char *name = NULL;
- CORE_ADDR text_relocation = 0; /* text_relocation */
- struct cleanup *cleanups;
- int mapped = 0;
- int readnow = 0;
-
- dont_repeat ();
-
- if (args == NULL)
- {
- if ((have_full_symbols () || have_partial_symbols ())
- && from_tty
- && !query ("Discard symbol table from `%s'? ",
- symfile_objfile -> name))
- error ("Not confirmed.");
- free_all_objfiles ();
-
- /* solib descriptors may have handles to objfiles. Since their
- storage has just been released, we'd better wipe the solib
- descriptors as well.
- */
-#if defined(SOLIB_RESTART)
- SOLIB_RESTART ();
-#endif
-
- symfile_objfile = NULL;
- if (from_tty)
- {
- printf_unfiltered ("No symbol file now.\n");
- }
-#ifdef HPUXHPPA
- RESET_HP_UX_GLOBALS ();
-#endif
- }
- else
- {
- if ((argv = buildargv (args)) == NULL)
- {
- nomem (0);
- }
- cleanups = make_cleanup ((make_cleanup_func) freeargv, (char *) argv);
- while (*argv != NULL)
- {
- if (STREQ (*argv, "-mapped"))
- {
- mapped = 1;
- }
- else if (STREQ (*argv, "-readnow"))
- {
- readnow = 1;
- }
- else if (**argv == '-')
- {
- error ("unknown option `%s'", *argv);
- }
- else
- {
- char *p;
-
- name = *argv;
-
- /* this is for rombug remote only, to get the text relocation by
- using link command */
- p = strrchr(name, '/');
- if (p != NULL) p++;
- else p = name;
-
- target_link(p, &text_relocation);
-
- if (text_relocation == (CORE_ADDR)0)
- return;
- else if (text_relocation == (CORE_ADDR)-1)
- {
- symbol_file_add (name, from_tty, (CORE_ADDR)0,
- 1, mapped, readnow, 1, 0);
-#ifdef HPUXHPPA
- RESET_HP_UX_GLOBALS ();
-#endif
- }
- else
- symbol_file_add (name, from_tty, (CORE_ADDR)text_relocation,
- 0, mapped, readnow, 1, 0);
-
- /* Getting new symbols may change our opinion about what is
- frameless. */
- reinit_frame_cache ();
-
- set_initial_language ();
- }
- argv++;
- }
-
- if (name == NULL)
- {
- error ("no symbol file name was specified");
- }
- TUIDO(((TuiOpaqueFuncPtr)tuiDisplayMainFunction));
- do_cleanups (cleanups);
- }
-}
-
-/* Set the initial language.
-
- A better solution would be to record the language in the psymtab when reading
- partial symbols, and then use it (if known) to set the language. This would
- be a win for formats that encode the language in an easily discoverable place,
- such as DWARF. For stabs, we can jump through hoops looking for specially
- named symbols or try to intuit the language from the specific type of stabs
- we find, but we can't do that until later when we read in full symbols.
- FIXME. */
-
-static void
-set_initial_language ()
-{
- struct partial_symtab *pst;
- enum language lang = language_unknown;
-
- pst = find_main_psymtab ();
- if (pst != NULL)
- {
- if (pst -> filename != NULL)
- {
- lang = deduce_language_from_filename (pst -> filename);
- }
- if (lang == language_unknown)
- {
- /* Make C the default language */
- lang = language_c;
- }
- set_language (lang);
- expected_language = current_language; /* Don't warn the user */
- }
-}
-
-/* Open file specified by NAME and hand it off to BFD for preliminary
- analysis. Result is a newly initialized bfd *, which includes a newly
- malloc'd` copy of NAME (tilde-expanded and made absolute).
- In case of trouble, error() is called. */
-
-bfd *
-symfile_bfd_open (name)
- char *name;
-{
- bfd *sym_bfd;
- int desc;
- char *absolute_name;
-
-
-
- name = tilde_expand (name); /* Returns 1st new malloc'd copy */
-
- /* Look down path for it, allocate 2nd new malloc'd copy. */
- desc = openp (getenv ("PATH"), 1, name, O_RDONLY | O_BINARY, 0, &absolute_name);
-#if defined(__GO32__) || defined(_WIN32)
- if (desc < 0)
- {
- char *exename = alloca (strlen (name) + 5);
- strcat (strcpy (exename, name), ".exe");
- desc = openp (getenv ("PATH"), 1, exename, O_RDONLY | O_BINARY,
- 0, &absolute_name);
- }
-#endif
- if (desc < 0)
- {
- make_cleanup (free, name);
- perror_with_name (name);
- }
- free (name); /* Free 1st new malloc'd copy */
- name = absolute_name; /* Keep 2nd malloc'd copy in bfd */
- /* It'll be freed in free_objfile(). */
-
- sym_bfd = bfd_fdopenr (name, gnutarget, desc);
- if (!sym_bfd)
- {
- close (desc);
- make_cleanup (free, name);
- error ("\"%s\": can't open to read symbols: %s.", name,
- bfd_errmsg (bfd_get_error ()));
- }
- sym_bfd->cacheable = true;
-
- if (!bfd_check_format (sym_bfd, bfd_object))
- {
- /* FIXME: should be checking for errors from bfd_close (for one thing,
- on error it does not free all the storage associated with the
- bfd). */
- bfd_close (sym_bfd); /* This also closes desc */
- make_cleanup (free, name);
- error ("\"%s\": can't read symbols: %s.", name,
- bfd_errmsg (bfd_get_error ()));
- }
-
-#ifdef HPUXHPPA
- {
- /********* TARGET SPECIFIC CODE (HACK!) **********
- *
- * The following code is HP-specific. The "right" way of
- * doing this is unknown, but we bet would involve a target-
- * specific pre-file-load check using a generic mechanism.
- */
- static prevent_recursion = 0; /* Needed for hack below! HP-specific */
-
- if( prevent_recursion == 0 ) {
- if( hpread_pxdb_needed (sym_bfd, name)) {
- /*
- * This file has not been pre-processed.
- * Preprocess now
- */
-
- if (hpread_call_pxdb(name))
- {
- /* The
- * call above has used "system" to pre-process
- * the on-disk file, so we now need to close
- * and re-open the file.
- */
- bfd_close (sym_bfd); /* This also closes 'desc', */
- /* hence the recursion. */
- prevent_recursion++;
- sym_bfd = symfile_bfd_open( name );
- prevent_recursion--;
- }
- }
- }
-}
- /*************** END HACK ********************/
-#endif
-
- return (sym_bfd);
-}
-
-/* Link a new symtab_fns into the global symtab_fns list. Called on gdb
- startup by the _initialize routine in each object file format reader,
- to register information about each format the the reader is prepared
- to handle. */
-
-void
-add_symtab_fns (sf)
- struct sym_fns *sf;
-{
- sf->next = symtab_fns;
- symtab_fns = sf;
-}
-
-
-/* Initialize to read symbols from the symbol file sym_bfd. It either
- returns or calls error(). The result is an initialized struct sym_fns
- in the objfile structure, that contains cached information about the
- symbol file. */
-
-static void
-find_sym_fns (objfile)
- struct objfile *objfile;
-{
- struct sym_fns *sf;
- enum bfd_flavour our_flavour = bfd_get_flavour (objfile -> obfd);
- char *our_target = bfd_get_target (objfile -> obfd);
-
- /* Special kludge for RS/6000 and PowerMac. See xcoffread.c. */
- if (STREQ (our_target, "aixcoff-rs6000") ||
- STREQ (our_target, "xcoff-powermac"))
- our_flavour = (enum bfd_flavour)-1;
-
- /* Special kludge for apollo. See dstread.c. */
- if (STREQN (our_target, "apollo", 6))
- our_flavour = (enum bfd_flavour)-2;
-
- for (sf = symtab_fns; sf != NULL; sf = sf -> next)
- {
- if (our_flavour == sf -> sym_flavour)
- {
- objfile -> sf = sf;
- return;
- }
- }
- error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
- bfd_get_target (objfile -> obfd));
-}
-
-/* This function runs the load command of our current target. */
-
-static void
-load_command (arg, from_tty)
- char *arg;
- int from_tty;
-{
- if (arg == NULL)
- arg = get_exec_file (1);
- target_load (arg, from_tty);
-}
-
-/* This version of "load" should be usable for any target. Currently
- it is just used for remote targets, not inftarg.c or core files,
- on the theory that only in that case is it useful.
-
- Avoiding xmodem and the like seems like a win (a) because we don't have
- to worry about finding it, and (b) On VMS, fork() is very slow and so
- we don't want to run a subprocess. On the other hand, I'm not sure how
- performance compares. */
-#define GENERIC_LOAD_CHUNK 256
-#define VALIDATE_DOWNLOAD 0
-void
-generic_load (filename, from_tty)
- char *filename;
- int from_tty;
-{
- struct cleanup *old_cleanups;
- asection *s;
- bfd *loadfile_bfd;
- time_t start_time, end_time; /* Start and end times of download */
- unsigned long data_count = 0; /* Number of bytes transferred to memory */
- int n;
- unsigned long load_offset = 0; /* offset to add to vma for each section */
- char buf[GENERIC_LOAD_CHUNK+8];
-#if VALIDATE_DOWNLOAD
- char verify_buffer[GENERIC_LOAD_CHUNK+8] ;
-#endif
-
- /* enable user to specify address for downloading as 2nd arg to load */
- n = sscanf(filename, "%s 0x%lx", buf, &load_offset);
- if (n > 1 )
- filename = buf;
- else
- load_offset = 0;
-
- loadfile_bfd = bfd_openr (filename, gnutarget);
- if (loadfile_bfd == NULL)
- {
- perror_with_name (filename);
- return;
- }
- /* FIXME: should be checking for errors from bfd_close (for one thing,
- on error it does not free all the storage associated with the
- bfd). */
- old_cleanups = make_cleanup ((make_cleanup_func) bfd_close, loadfile_bfd);
-
- if (!bfd_check_format (loadfile_bfd, bfd_object))
- {
- error ("\"%s\" is not an object file: %s", filename,
- bfd_errmsg (bfd_get_error ()));
- }
-
- start_time = time (NULL);
-
- for (s = loadfile_bfd->sections; s; s = s->next)
- {
- if (s->flags & SEC_LOAD)
- {
- bfd_size_type size;
-
- size = bfd_get_section_size_before_reloc (s);
- if (size > 0)
- {
- char *buffer;
- struct cleanup *old_chain;
- bfd_vma lma;
- unsigned long l = size ;
- int err;
- char *sect;
- unsigned long sent;
- unsigned long len;
-
- l = l > GENERIC_LOAD_CHUNK ? GENERIC_LOAD_CHUNK : l ;
-
- buffer = xmalloc (size);
- old_chain = make_cleanup (free, buffer);
-
- lma = s->lma;
- lma += load_offset;
-
- /* Is this really necessary? I guess it gives the user something
- to look at during a long download. */
- printf_filtered ("Loading section %s, size 0x%lx lma ",
- bfd_get_section_name (loadfile_bfd, s),
- (unsigned long) size);
- print_address_numeric (lma, 1, gdb_stdout);
- printf_filtered ("\n");
-
- bfd_get_section_contents (loadfile_bfd, s, buffer, 0, size);
-
- sect = (char *) bfd_get_section_name (loadfile_bfd, s);
- sent = 0;
- do
- {
- len = (size - sent) < l ? (size - sent) : l;
- sent += len;
- err = target_write_memory (lma, buffer, len);
- if (ui_load_progress_hook)
- if (ui_load_progress_hook (sect, sent))
- error ("Canceled the download");
-#if VALIDATE_DOWNLOAD
- /* Broken memories and broken monitors manifest themselves
- here when bring new computers to life.
- This doubles already slow downloads.
- */
- if (err) break ;
- {
- target_read_memory(lma,verify_buffer,len) ;
- if (0 != bcmp(buffer,verify_buffer,len))
- error("Download verify failed at %08x",
- (unsigned long)lma) ;
- }
-
-#endif
- data_count += len ;
- lma += len;
- buffer += len;
- } /* od */
- while (err == 0 && sent < size);
-
- if (err != 0)
- error ("Memory access error while loading section %s.",
- bfd_get_section_name (loadfile_bfd, s));
-
- do_cleanups (old_chain);
- }
- }
- }
-
- end_time = time (NULL);
- {
- unsigned long entry ;
- entry = bfd_get_start_address(loadfile_bfd) ;
- printf_filtered ("Start address 0x%lx , load size %d\n", entry,data_count);
- /* We were doing this in remote-mips.c, I suspect it is right
- for other targets too. */
- write_pc (entry);
- }
-
- /* FIXME: are we supposed to call symbol_file_add or not? According to
- a comment from remote-mips.c (where a call to symbol_file_add was
- commented out), making the call confuses GDB if more than one file is
- loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c
- does. */
-
- report_transfer_performance (data_count, start_time, end_time);
-
- do_cleanups (old_cleanups);
-}
-
-/* Report how fast the transfer went. */
-
-void
-report_transfer_performance (data_count, start_time, end_time)
-unsigned long data_count;
-time_t start_time, end_time;
-{
- printf_filtered ("Transfer rate: ");
- if (end_time != start_time)
- printf_filtered ("%d bits/sec",
- (data_count * 8) / (end_time - start_time));
- else
- printf_filtered ("%d bits in <1 sec", (data_count * 8));
- printf_filtered (".\n");
-}
-
-/* This function allows the addition of incrementally linked object files.
- It does not modify any state in the target, only in the debugger. */
-
-/* ARGSUSED */
-static void
-add_symbol_file_command (args, from_tty)
- char *args;
- int from_tty;
-{
- char *name = NULL;
- CORE_ADDR text_addr;
- char *arg;
- int readnow = 0;
- int mapped = 0;
-
- dont_repeat ();
-
- if (args == NULL)
- {
- error ("add-symbol-file takes a file name and an address");
- }
-
- /* Make a copy of the string that we can safely write into. */
-
- args = strdup (args);
- make_cleanup (free, args);
-
- /* Pick off any -option args and the file name. */
-
- while ((*args != '\000') && (name == NULL))
- {
- while (isspace (*args)) {args++;}
- arg = args;
- while ((*args != '\000') && !isspace (*args)) {args++;}
- if (*args != '\000')
- {
- *args++ = '\000';
- }
- if (*arg != '-')
- {
- name = arg;
- }
- else if (STREQ (arg, "-mapped"))
- {
- mapped = 1;
- }
- else if (STREQ (arg, "-readnow"))
- {
- readnow = 1;
- }
- else
- {
- error ("unknown option `%s'", arg);
- }
- }
-
- /* After picking off any options and the file name, args should be
- left pointing at the remainder of the command line, which should
- be the address expression to evaluate. */
-
- if (name == NULL)
- {
- error ("add-symbol-file takes a file name");
- }
- name = tilde_expand (name);
- make_cleanup (free, name);
-
- if (*args != '\000')
- {
- text_addr = parse_and_eval_address (args);
- }
- else
- {
- target_link(name, &text_addr);
- if (text_addr == (CORE_ADDR)-1)
- error("Don't know how to get text start location for this file");
- }
-
- /* FIXME-32x64: Assumes text_addr fits in a long. */
- if ((from_tty)
- && (!query ("add symbol table from file \"%s\" at text_addr = %s?\n",
- name, local_hex_string ((unsigned long)text_addr))))
- error ("Not confirmed.");
-
- symbol_file_add (name, from_tty, text_addr, 0, mapped, readnow,
- 1, /* user_loaded */
- 0); /* We'll guess it's ! is_solib */
-
- /* Getting new symbols may change our opinion about what is
- frameless. */
- reinit_frame_cache ();
-}
-
-static void
-add_shared_symbol_files_command (args, from_tty)
- char *args;
- int from_tty;
-{
-#ifdef ADD_SHARED_SYMBOL_FILES
- ADD_SHARED_SYMBOL_FILES (args, from_tty);
-#else
- error ("This command is not available in this configuration of GDB.");
-#endif
-}
-
-/* Re-read symbols if a symbol-file has changed. */
-void
-reread_symbols ()
-{
- struct objfile *objfile;
- long new_modtime;
- int reread_one = 0;
- struct stat new_statbuf;
- int res;
-
- /* With the addition of shared libraries, this should be modified,
- the load time should be saved in the partial symbol tables, since
- different tables may come from different source files. FIXME.
- This routine should then walk down each partial symbol table
- and see if the symbol table that it originates from has been changed */
-
- for (objfile = object_files; objfile; objfile = objfile->next) {
- if (objfile->obfd) {
-#ifdef IBM6000_TARGET
- /* If this object is from a shared library, then you should
- stat on the library name, not member name. */
-
- if (objfile->obfd->my_archive)
- res = stat (objfile->obfd->my_archive->filename, &new_statbuf);
- else
-#endif
- res = stat (objfile->name, &new_statbuf);
- if (res != 0) {
- /* FIXME, should use print_sys_errmsg but it's not filtered. */
- printf_filtered ("`%s' has disappeared; keeping its symbols.\n",
- objfile->name);
- continue;
- }
- new_modtime = new_statbuf.st_mtime;
- if (new_modtime != objfile->mtime)
- {
- struct cleanup *old_cleanups;
- struct section_offsets *offsets;
- int num_offsets;
- int section_offsets_size;
- char *obfd_filename;
-
- printf_filtered ("`%s' has changed; re-reading symbols.\n",
- objfile->name);
-
- /* There are various functions like symbol_file_add,
- symfile_bfd_open, syms_from_objfile, etc., which might
- appear to do what we want. But they have various other
- effects which we *don't* want. So we just do stuff
- ourselves. We don't worry about mapped files (for one thing,
- any mapped file will be out of date). */
-
- /* If we get an error, blow away this objfile (not sure if
- that is the correct response for things like shared
- libraries). */
- old_cleanups = make_cleanup ((make_cleanup_func) free_objfile,
- objfile);
- /* We need to do this whenever any symbols go away. */
- make_cleanup ((make_cleanup_func) clear_symtab_users, 0);
-
- /* Clean up any state BFD has sitting around. We don't need
- to close the descriptor but BFD lacks a way of closing the
- BFD without closing the descriptor. */
- obfd_filename = bfd_get_filename (objfile->obfd);
- if (!bfd_close (objfile->obfd))
- error ("Can't close BFD for %s: %s", objfile->name,
- bfd_errmsg (bfd_get_error ()));
- objfile->obfd = bfd_openr (obfd_filename, gnutarget);
- if (objfile->obfd == NULL)
- error ("Can't open %s to read symbols.", objfile->name);
- /* bfd_openr sets cacheable to true, which is what we want. */
- if (!bfd_check_format (objfile->obfd, bfd_object))
- error ("Can't read symbols from %s: %s.", objfile->name,
- bfd_errmsg (bfd_get_error ()));
-
- /* Save the offsets, we will nuke them with the rest of the
- psymbol_obstack. */
- num_offsets = objfile->num_sections;
- section_offsets_size =
- sizeof (struct section_offsets)
- + sizeof (objfile->section_offsets->offsets) * num_offsets;
- offsets = (struct section_offsets *) alloca (section_offsets_size);
- memcpy (offsets, objfile->section_offsets, section_offsets_size);
-
- /* Nuke all the state that we will re-read. Much of the following
- code which sets things to NULL really is necessary to tell
- other parts of GDB that there is nothing currently there. */
-
- /* FIXME: Do we have to free a whole linked list, or is this
- enough? */
- if (objfile->global_psymbols.list)
- mfree (objfile->md, objfile->global_psymbols.list);
- memset (&objfile -> global_psymbols, 0,
- sizeof (objfile -> global_psymbols));
- if (objfile->static_psymbols.list)
- mfree (objfile->md, objfile->static_psymbols.list);
- memset (&objfile -> static_psymbols, 0,
- sizeof (objfile -> static_psymbols));
-
- /* Free the obstacks for non-reusable objfiles */
- obstack_free (&objfile -> psymbol_cache.cache, 0);
- memset (&objfile -> psymbol_cache, 0,
- sizeof (objfile -> psymbol_cache));
- obstack_free (&objfile -> psymbol_obstack, 0);
- obstack_free (&objfile -> symbol_obstack, 0);
- obstack_free (&objfile -> type_obstack, 0);
- objfile->sections = NULL;
- objfile->symtabs = NULL;
- objfile->psymtabs = NULL;
- objfile->free_psymtabs = NULL;
- objfile->msymbols = NULL;
- objfile->minimal_symbol_count= 0;
- objfile->fundamental_types = NULL;
- if (objfile -> sf != NULL)
- {
- (*objfile -> sf -> sym_finish) (objfile);
- }
-
- /* We never make this a mapped file. */
- objfile -> md = NULL;
- /* obstack_specify_allocation also initializes the obstack so
- it is empty. */
- obstack_specify_allocation (&objfile -> psymbol_cache.cache, 0, 0,
- xmalloc, free);
- obstack_specify_allocation (&objfile -> psymbol_obstack, 0, 0,
- xmalloc, free);
- obstack_specify_allocation (&objfile -> symbol_obstack, 0, 0,
- xmalloc, free);
- obstack_specify_allocation (&objfile -> type_obstack, 0, 0,
- xmalloc, free);
- if (build_objfile_section_table (objfile))
- {
- error ("Can't find the file sections in `%s': %s",
- objfile -> name, bfd_errmsg (bfd_get_error ()));
- }
-
- /* We use the same section offsets as from last time. I'm not
- sure whether that is always correct for shared libraries. */
- objfile->section_offsets = (struct section_offsets *)
- obstack_alloc (&objfile -> psymbol_obstack, section_offsets_size);
- memcpy (objfile->section_offsets, offsets, section_offsets_size);
- objfile->num_sections = num_offsets;
-
- /* What the hell is sym_new_init for, anyway? The concept of
- distinguishing between the main file and additional files
- in this way seems rather dubious. */
- if (objfile == symfile_objfile)
- {
- (*objfile->sf->sym_new_init) (objfile);
-#ifdef HPUXHPPA
- RESET_HP_UX_GLOBALS ();
-#endif
- }
-
- (*objfile->sf->sym_init) (objfile);
- clear_complaints (1, 1);
- /* The "mainline" parameter is a hideous hack; I think leaving it
- zero is OK since dbxread.c also does what it needs to do if
- objfile->global_psymbols.size is 0. */
- (*objfile->sf->sym_read) (objfile, objfile->section_offsets, 0);
- if (!have_partial_symbols () && !have_full_symbols ())
- {
- wrap_here ("");
- printf_filtered ("(no debugging symbols found)\n");
- wrap_here ("");
- }
- objfile -> flags |= OBJF_SYMS;
-
- /* We're done reading the symbol file; finish off complaints. */
- clear_complaints (0, 1);
-
- /* Getting new symbols may change our opinion about what is
- frameless. */
-
- reinit_frame_cache ();
-
- /* Discard cleanups as symbol reading was successful. */
- discard_cleanups (old_cleanups);
-
- /* If the mtime has changed between the time we set new_modtime
- and now, we *want* this to be out of date, so don't call stat
- again now. */
- objfile->mtime = new_modtime;
- reread_one = 1;
-
- /* Call this after reading in a new symbol table to give target
- dependant code a crack at the new symbols. For instance, this
- could be used to update the values of target-specific symbols GDB
- needs to keep track of (such as _sigtramp, or whatever). */
-
- TARGET_SYMFILE_POSTREAD (objfile);
- }
- }
- }
-
- if (reread_one)
- clear_symtab_users ();
-}
-
-
-
-typedef struct {
- char *ext;
- enum language lang;
-} filename_language;
-
-static filename_language * filename_language_table;
-static int fl_table_size, fl_table_next;
-
-static void
-add_filename_language (ext, lang)
- char *ext;
- enum language lang;
-{
- if (fl_table_next >= fl_table_size)
- {
- fl_table_size += 10;
- filename_language_table = realloc (filename_language_table,
- fl_table_size);
- }
-
- filename_language_table[fl_table_next].ext = strsave (ext);
- filename_language_table[fl_table_next].lang = lang;
- fl_table_next++;
-}
-
-static char *ext_args;
-
-static void
-set_ext_lang_command (args, from_tty)
- char *args;
- int from_tty;
-{
- int i;
- char *cp = ext_args;
- enum language lang;
-
- /* First arg is filename extension, starting with '.' */
- if (*cp != '.')
- error ("'%s': Filename extension must begin with '.'", ext_args);
-
- /* Find end of first arg. */
- while (*cp && !isspace (*cp))
- cp++;
-
- if (*cp == '\0')
- error ("'%s': two arguments required -- filename extension and language",
- ext_args);
-
- /* Null-terminate first arg */
- *cp++ = '\0';
-
- /* Find beginning of second arg, which should be a source language. */
- while (*cp && isspace (*cp))
- cp++;
-
- if (*cp == '\0')
- error ("'%s': two arguments required -- filename extension and language",
- ext_args);
-
- /* Lookup the language from among those we know. */
- lang = language_enum (cp);
-
- /* Now lookup the filename extension: do we already know it? */
- for (i = 0; i < fl_table_next; i++)
- if (0 == strcmp (ext_args, filename_language_table[i].ext))
- break;
-
- if (i >= fl_table_next)
- {
- /* new file extension */
- add_filename_language (ext_args, lang);
- }
- else
- {
- /* redefining a previously known filename extension */
-
- /* if (from_tty) */
- /* query ("Really make files of type %s '%s'?", */
- /* ext_args, language_str (lang)); */
-
- free (filename_language_table[i].ext);
- filename_language_table[i].ext = strsave (ext_args);
- filename_language_table[i].lang = lang;
- }
-}
-
-static void
-info_ext_lang_command (args, from_tty)
- char *args;
- int from_tty;
-{
- int i;
-
- printf_filtered ("Filename extensions and the languages they represent:");
- printf_filtered ("\n\n");
- for (i = 0; i < fl_table_next; i++)
- printf_filtered ("\t%s\t- %s\n",
- filename_language_table[i].ext,
- language_str (filename_language_table[i].lang));
-}
-
-static void
-init_filename_language_table ()
-{
- if (fl_table_size == 0) /* protect against repetition */
- {
- fl_table_size = 20;
- fl_table_next = 0;
- filename_language_table =
- xmalloc (fl_table_size * sizeof (*filename_language_table));
- add_filename_language (".c", language_c);
- add_filename_language (".C", language_cplus);
- add_filename_language (".cc", language_cplus);
- add_filename_language (".cp", language_cplus);
- add_filename_language (".cpp", language_cplus);
- add_filename_language (".cxx", language_cplus);
- add_filename_language (".c++", language_cplus);
- /* start-sanitize-java */
- add_filename_language (".java", language_java);
- add_filename_language (".class", language_java);
- /* end-sanitize-java */
- add_filename_language (".ch", language_chill);
- add_filename_language (".c186", language_chill);
- add_filename_language (".c286", language_chill);
- add_filename_language (".f", language_fortran);
- add_filename_language (".F", language_fortran);
- add_filename_language (".s", language_asm);
- add_filename_language (".S", language_asm);
- }
-}
-
-enum language
-deduce_language_from_filename (filename)
- char *filename;
-{
- int i;
- char *cp;
-
- if (filename != NULL)
- if ((cp = strrchr (filename, '.')) != NULL)
- for (i = 0; i < fl_table_next; i++)
- if (strcmp (cp, filename_language_table[i].ext) == 0)
- return filename_language_table[i].lang;
-
- return language_unknown;
-}
-
-/* allocate_symtab:
-
- Allocate and partly initialize a new symbol table. Return a pointer
- to it. error() if no space.
-
- Caller must set these fields:
- LINETABLE(symtab)
- symtab->blockvector
- symtab->dirname
- symtab->free_code
- symtab->free_ptr
- possibly free_named_symtabs (symtab->filename);
- */
-
-struct symtab *
-allocate_symtab (filename, objfile)
- char *filename;
- struct objfile *objfile;
-{
- register struct symtab *symtab;
-
- symtab = (struct symtab *)
- obstack_alloc (&objfile -> symbol_obstack, sizeof (struct symtab));
- memset (symtab, 0, sizeof (*symtab));
- symtab -> filename = obsavestring (filename, strlen (filename),
- &objfile -> symbol_obstack);
- symtab -> fullname = NULL;
- symtab -> language = deduce_language_from_filename (filename);
- symtab -> debugformat = obsavestring ("unknown", 7,
- &objfile -> symbol_obstack);
-
- /* Hook it to the objfile it comes from */
-
- symtab -> objfile = objfile;
- symtab -> next = objfile -> symtabs;
- objfile -> symtabs = symtab;
-
- /* FIXME: This should go away. It is only defined for the Z8000,
- and the Z8000 definition of this macro doesn't have anything to
- do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
- here for convenience. */
-#ifdef INIT_EXTRA_SYMTAB_INFO
- INIT_EXTRA_SYMTAB_INFO (symtab);
-#endif
-
- return (symtab);
-}
-
-struct partial_symtab *
-allocate_psymtab (filename, objfile)
- char *filename;
- struct objfile *objfile;
-{
- struct partial_symtab *psymtab;
-
- if (objfile -> free_psymtabs)
- {
- psymtab = objfile -> free_psymtabs;
- objfile -> free_psymtabs = psymtab -> next;
- }
- else
- psymtab = (struct partial_symtab *)
- obstack_alloc (&objfile -> psymbol_obstack,
- sizeof (struct partial_symtab));
-
- memset (psymtab, 0, sizeof (struct partial_symtab));
- psymtab -> filename = obsavestring (filename, strlen (filename),
- &objfile -> psymbol_obstack);
- psymtab -> symtab = NULL;
-
- /* Prepend it to the psymtab list for the objfile it belongs to.
- Psymtabs are searched in most recent inserted -> least recent
- inserted order. */
-
- psymtab -> objfile = objfile;
- psymtab -> next = objfile -> psymtabs;
- objfile -> psymtabs = psymtab;
-#if 0
- {
- struct partial_symtab **prev_pst;
- psymtab -> objfile = objfile;
- psymtab -> next = NULL;
- prev_pst = &(objfile -> psymtabs);
- while ((*prev_pst) != NULL)
- prev_pst = &((*prev_pst) -> next);
- (*prev_pst) = psymtab;
- }
-#endif
-
- return (psymtab);
-}
-
-void
-discard_psymtab (pst)
- struct partial_symtab *pst;
-{
- struct partial_symtab **prev_pst;
-
- /* From dbxread.c:
- Empty psymtabs happen as a result of header files which don't
- have any symbols in them. There can be a lot of them. But this
- check is wrong, in that a psymtab with N_SLINE entries but
- nothing else is not empty, but we don't realize that. Fixing
- that without slowing things down might be tricky. */
-
- /* First, snip it out of the psymtab chain */
-
- prev_pst = &(pst->objfile->psymtabs);
- while ((*prev_pst) != pst)
- prev_pst = &((*prev_pst)->next);
- (*prev_pst) = pst->next;
-
- /* Next, put it on a free list for recycling */
-
- pst->next = pst->objfile->free_psymtabs;
- pst->objfile->free_psymtabs = pst;
-}
-
-
-/* Reset all data structures in gdb which may contain references to symbol
- table data. */
-
-void
-clear_symtab_users ()
-{
- /* Someday, we should do better than this, by only blowing away
- the things that really need to be blown. */
- clear_value_history ();
- clear_displays ();
- clear_internalvars ();
- breakpoint_re_set ();
- set_default_breakpoint (0, 0, 0, 0);
- current_source_symtab = 0;
- current_source_line = 0;
- clear_pc_function_cache ();
- target_new_objfile (NULL);
-}
-
-/* clear_symtab_users_once:
-
- This function is run after symbol reading, or from a cleanup.
- If an old symbol table was obsoleted, the old symbol table
- has been blown away, but the other GDB data structures that may
- reference it have not yet been cleared or re-directed. (The old
- symtab was zapped, and the cleanup queued, in free_named_symtab()
- below.)
-
- This function can be queued N times as a cleanup, or called
- directly; it will do all the work the first time, and then will be a
- no-op until the next time it is queued. This works by bumping a
- counter at queueing time. Much later when the cleanup is run, or at
- the end of symbol processing (in case the cleanup is discarded), if
- the queued count is greater than the "done-count", we do the work
- and set the done-count to the queued count. If the queued count is
- less than or equal to the done-count, we just ignore the call. This
- is needed because reading a single .o file will often replace many
- symtabs (one per .h file, for example), and we don't want to reset
- the breakpoints N times in the user's face.
-
- The reason we both queue a cleanup, and call it directly after symbol
- reading, is because the cleanup protects us in case of errors, but is
- discarded if symbol reading is successful. */
-
-#if 0
-/* FIXME: As free_named_symtabs is currently a big noop this function
- is no longer needed. */
-static void
-clear_symtab_users_once PARAMS ((void));
-
-static int clear_symtab_users_queued;
-static int clear_symtab_users_done;
-
-static void
-clear_symtab_users_once ()
-{
- /* Enforce once-per-`do_cleanups'-semantics */
- if (clear_symtab_users_queued <= clear_symtab_users_done)
- return;
- clear_symtab_users_done = clear_symtab_users_queued;
-
- clear_symtab_users ();
-}
-#endif
-
-/* Delete the specified psymtab, and any others that reference it. */
-
-static void
-cashier_psymtab (pst)
- struct partial_symtab *pst;
-{
- struct partial_symtab *ps, *pprev = NULL;
- int i;
-
- /* Find its previous psymtab in the chain */
- for (ps = pst->objfile->psymtabs; ps; ps = ps->next) {
- if (ps == pst)
- break;
- pprev = ps;
- }
-
- if (ps) {
- /* Unhook it from the chain. */
- if (ps == pst->objfile->psymtabs)
- pst->objfile->psymtabs = ps->next;
- else
- pprev->next = ps->next;
-
- /* FIXME, we can't conveniently deallocate the entries in the
- partial_symbol lists (global_psymbols/static_psymbols) that
- this psymtab points to. These just take up space until all
- the psymtabs are reclaimed. Ditto the dependencies list and
- filename, which are all in the psymbol_obstack. */
-
- /* We need to cashier any psymtab that has this one as a dependency... */
-again:
- for (ps = pst->objfile->psymtabs; ps; ps = ps->next) {
- for (i = 0; i < ps->number_of_dependencies; i++) {
- if (ps->dependencies[i] == pst) {
- cashier_psymtab (ps);
- goto again; /* Must restart, chain has been munged. */
- }
- }
- }
- }
-}
-
-/* If a symtab or psymtab for filename NAME is found, free it along
- with any dependent breakpoints, displays, etc.
- Used when loading new versions of object modules with the "add-file"
- command. This is only called on the top-level symtab or psymtab's name;
- it is not called for subsidiary files such as .h files.
-
- Return value is 1 if we blew away the environment, 0 if not.
- FIXME. The return valu appears to never be used.
-
- FIXME. I think this is not the best way to do this. We should
- work on being gentler to the environment while still cleaning up
- all stray pointers into the freed symtab. */
-
-int
-free_named_symtabs (name)
- char *name;
-{
-#if 0
- /* FIXME: With the new method of each objfile having it's own
- psymtab list, this function needs serious rethinking. In particular,
- why was it ever necessary to toss psymtabs with specific compilation
- unit filenames, as opposed to all psymtabs from a particular symbol
- file? -- fnf
- Well, the answer is that some systems permit reloading of particular
- compilation units. We want to blow away any old info about these
- compilation units, regardless of which objfiles they arrived in. --gnu. */
-
- register struct symtab *s;
- register struct symtab *prev;
- register struct partial_symtab *ps;
- struct blockvector *bv;
- int blewit = 0;
-
- /* We only wack things if the symbol-reload switch is set. */
- if (!symbol_reloading)
- return 0;
-
- /* Some symbol formats have trouble providing file names... */
- if (name == 0 || *name == '\0')
- return 0;
-
- /* Look for a psymtab with the specified name. */
-
-again2:
- for (ps = partial_symtab_list; ps; ps = ps->next) {
- if (STREQ (name, ps->filename)) {
- cashier_psymtab (ps); /* Blow it away...and its little dog, too. */
- goto again2; /* Must restart, chain has been munged */
- }
- }
-
- /* Look for a symtab with the specified name. */
-
- for (s = symtab_list; s; s = s->next)
- {
- if (STREQ (name, s->filename))
- break;
- prev = s;
- }
-
- if (s)
- {
- if (s == symtab_list)
- symtab_list = s->next;
- else
- prev->next = s->next;
-
- /* For now, queue a delete for all breakpoints, displays, etc., whether
- or not they depend on the symtab being freed. This should be
- changed so that only those data structures affected are deleted. */
-
- /* But don't delete anything if the symtab is empty.
- This test is necessary due to a bug in "dbxread.c" that
- causes empty symtabs to be created for N_SO symbols that
- contain the pathname of the object file. (This problem
- has been fixed in GDB 3.9x). */
-
- bv = BLOCKVECTOR (s);
- if (BLOCKVECTOR_NBLOCKS (bv) > 2
- || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK))
- || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)))
- {
- complain (&oldsyms_complaint, name);
-
- clear_symtab_users_queued++;
- make_cleanup (clear_symtab_users_once, 0);
- blewit = 1;
- } else {
- complain (&empty_symtab_complaint, name);
- }
-
- free_symtab (s);
- }
- else
- {
- /* It is still possible that some breakpoints will be affected
- even though no symtab was found, since the file might have
- been compiled without debugging, and hence not be associated
- with a symtab. In order to handle this correctly, we would need
- to keep a list of text address ranges for undebuggable files.
- For now, we do nothing, since this is a fairly obscure case. */
- ;
- }
-
- /* FIXME, what about the minimal symbol table? */
- return blewit;
-#else
- return (0);
-#endif
-}
-
-/* Allocate and partially fill a partial symtab. It will be
- completely filled at the end of the symbol list.
-
- SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
- is the address relative to which its symbols are (incremental) or 0
- (normal). */
-
-
-struct partial_symtab *
-start_psymtab_common (objfile, section_offsets,
- filename, textlow, global_syms, static_syms)
- struct objfile *objfile;
- struct section_offsets *section_offsets;
- char *filename;
- CORE_ADDR textlow;
- struct partial_symbol **global_syms;
- struct partial_symbol **static_syms;
-{
- struct partial_symtab *psymtab;
-
- psymtab = allocate_psymtab (filename, objfile);
- psymtab -> section_offsets = section_offsets;
- psymtab -> textlow = textlow;
- psymtab -> texthigh = psymtab -> textlow; /* default */
- psymtab -> globals_offset = global_syms - objfile -> global_psymbols.list;
- psymtab -> statics_offset = static_syms - objfile -> static_psymbols.list;
- return (psymtab);
-}
-
-/* Add a symbol with a long value to a psymtab.
- Since one arg is a struct, we pass in a ptr and deref it (sigh). */
-
-void
-add_psymbol_to_list (name, namelength, namespace, class, list, val, coreaddr,
- language, objfile)
- char *name;
- int namelength;
- namespace_enum namespace;
- enum address_class class;
- struct psymbol_allocation_list *list;
- long val; /* Value as a long */
- CORE_ADDR coreaddr; /* Value as a CORE_ADDR */
- enum language language;
- struct objfile *objfile;
-{
- register struct partial_symbol *psym;
- char *buf = alloca (namelength + 1);
- /* psymbol is static so that there will be no uninitialized gaps in the
- structure which might contain random data, causing cache misses in
- bcache. */
- static struct partial_symbol psymbol;
-
- /* Create local copy of the partial symbol */
- memcpy (buf, name, namelength);
- buf[namelength] = '\0';
- SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, &objfile->psymbol_cache);
- /* val and coreaddr are mutually exclusive, one of them *will* be zero */
- if (val != 0)
- {
- SYMBOL_VALUE (&psymbol) = val;
- }
- else
- {
- SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
- }
- SYMBOL_SECTION (&psymbol) = 0;
- SYMBOL_LANGUAGE (&psymbol) = language;
- PSYMBOL_NAMESPACE (&psymbol) = namespace;
- PSYMBOL_CLASS (&psymbol) = class;
- SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language);
-
- /* Stash the partial symbol away in the cache */
- psym = bcache (&psymbol, sizeof (struct partial_symbol), &objfile->psymbol_cache);
-
- /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
- if (list->next >= list->list + list->size)
- {
- extend_psymbol_list (list, objfile);
- }
- *list->next++ = psym;
- OBJSTAT (objfile, n_psyms++);
-}
-
-/* Add a symbol with a long value to a psymtab. This differs from
- * add_psymbol_to_list above in taking both a mangled and a demangled
- * name. */
-
-void
-add_psymbol_with_dem_name_to_list (name, namelength, dem_name, dem_namelength,
- namespace, class, list, val, coreaddr, language, objfile)
- char *name;
- int namelength;
- char *dem_name;
- int dem_namelength;
- namespace_enum namespace;
- enum address_class class;
- struct psymbol_allocation_list *list;
- long val; /* Value as a long */
- CORE_ADDR coreaddr; /* Value as a CORE_ADDR */
- enum language language;
- struct objfile *objfile;
-{
- register struct partial_symbol *psym;
- char *buf = alloca (namelength + 1);
- /* psymbol is static so that there will be no uninitialized gaps in the
- structure which might contain random data, causing cache misses in
- bcache. */
- static struct partial_symbol psymbol;
-
- /* Create local copy of the partial symbol */
-
- memcpy (buf, name, namelength);
- buf[namelength] = '\0';
- SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, &objfile->psymbol_cache);
-
- buf = alloca (dem_namelength + 1);
- memcpy (buf, dem_name, dem_namelength);
- buf[dem_namelength] = '\0';
-
- switch (language)
- {
- case language_c:
- case language_cplus:
- SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol) =
- bcache (buf, dem_namelength + 1, &objfile->psymbol_cache);
- break;
- case language_chill:
- SYMBOL_CHILL_DEMANGLED_NAME (&psymbol) =
- bcache (buf, dem_namelength + 1, &objfile->psymbol_cache);
-
- /* FIXME What should be done for the default case? Ignoring for now. */
- }
-
- /* val and coreaddr are mutually exclusive, one of them *will* be zero */
- if (val != 0)
- {
- SYMBOL_VALUE (&psymbol) = val;
- }
- else
- {
- SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
- }
- SYMBOL_SECTION (&psymbol) = 0;
- SYMBOL_LANGUAGE (&psymbol) = language;
- PSYMBOL_NAMESPACE (&psymbol) = namespace;
- PSYMBOL_CLASS (&psymbol) = class;
- SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language);
-
- /* Stash the partial symbol away in the cache */
- psym = bcache (&psymbol, sizeof (struct partial_symbol), &objfile->psymbol_cache);
-
- /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
- if (list->next >= list->list + list->size)
- {
- extend_psymbol_list (list, objfile);
- }
- *list->next++ = psym;
- OBJSTAT (objfile, n_psyms++);
-}
-
-/* Initialize storage for partial symbols. */
-
-void
-init_psymbol_list (objfile, total_symbols)
- struct objfile *objfile;
- int total_symbols;
-{
- /* Free any previously allocated psymbol lists. */
-
- if (objfile -> global_psymbols.list)
- {
- mfree (objfile -> md, (PTR)objfile -> global_psymbols.list);
- }
- if (objfile -> static_psymbols.list)
- {
- mfree (objfile -> md, (PTR)objfile -> static_psymbols.list);
- }
-
- /* Current best guess is that approximately a twentieth
- of the total symbols (in a debugging file) are global or static
- oriented symbols */
-
- objfile -> global_psymbols.size = total_symbols / 10;
- objfile -> static_psymbols.size = total_symbols / 10;
-
- if (objfile -> global_psymbols.size > 0)
- {
- objfile -> global_psymbols.next =
- objfile -> global_psymbols.list = (struct partial_symbol **)
- xmmalloc (objfile -> md, (objfile -> global_psymbols.size
- * sizeof (struct partial_symbol *)));
- }
- if (objfile -> static_psymbols.size > 0)
- {
- objfile -> static_psymbols.next =
- objfile -> static_psymbols.list = (struct partial_symbol **)
- xmmalloc (objfile -> md, (objfile -> static_psymbols.size
- * sizeof (struct partial_symbol *)));
- }
-}
-
-/* OVERLAYS:
- The following code implements an abstraction for debugging overlay sections.
-
- The target model is as follows:
- 1) The gnu linker will permit multiple sections to be mapped into the
- same VMA, each with its own unique LMA (or load address).
- 2) It is assumed that some runtime mechanism exists for mapping the
- sections, one by one, from the load address into the VMA address.
- 3) This code provides a mechanism for gdb to keep track of which
- sections should be considered to be mapped from the VMA to the LMA.
- This information is used for symbol lookup, and memory read/write.
- For instance, if a section has been mapped then its contents
- should be read from the VMA, otherwise from the LMA.
-
- Two levels of debugger support for overlays are available. One is
- "manual", in which the debugger relies on the user to tell it which
- overlays are currently mapped. This level of support is
- implemented entirely in the core debugger, and the information about
- whether a section is mapped is kept in the objfile->obj_section table.
-
- The second level of support is "automatic", and is only available if
- the target-specific code provides functionality to read the target's
- overlay mapping table, and translate its contents for the debugger
- (by updating the mapped state information in the obj_section tables).
-
- The interface is as follows:
- User commands:
- overlay map <name> -- tell gdb to consider this section mapped
- overlay unmap <name> -- tell gdb to consider this section unmapped
- overlay list -- list the sections that GDB thinks are mapped
- overlay read-target -- get the target's state of what's mapped
- overlay off/manual/auto -- set overlay debugging state
- Functional interface:
- find_pc_mapped_section(pc): if the pc is in the range of a mapped
- section, return that section.
- find_pc_overlay(pc): find any overlay section that contains
- the pc, either in its VMA or its LMA
- overlay_is_mapped(sect): true if overlay is marked as mapped
- section_is_overlay(sect): true if section's VMA != LMA
- pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
- pc_in_unmapped_range(...): true if pc belongs to section's LMA
- overlay_mapped_address(...): map an address from section's LMA to VMA
- overlay_unmapped_address(...): map an address from section's VMA to LMA
- symbol_overlayed_address(...): Return a "current" address for symbol:
- either in VMA or LMA depending on whether
- the symbol's section is currently mapped
- */
-
-/* Overlay debugging state: */
-
-int overlay_debugging = 0; /* 0 == off, 1 == manual, -1 == auto */
-int overlay_cache_invalid = 0; /* True if need to refresh mapped state */
-
-/* Target vector for refreshing overlay mapped state */
-static void simple_overlay_update PARAMS ((struct obj_section *));
-void (*target_overlay_update) PARAMS ((struct obj_section *))
- = simple_overlay_update;
-
-/* Function: section_is_overlay (SECTION)
- Returns true if SECTION has VMA not equal to LMA, ie.
- SECTION is loaded at an address different from where it will "run". */
-
-int
-section_is_overlay (section)
- asection *section;
-{
- if (overlay_debugging)
- if (section && section->lma != 0 &&
- section->vma != section->lma)
- return 1;
-
- return 0;
-}
-
-/* Function: overlay_invalidate_all (void)
- Invalidate the mapped state of all overlay sections (mark it as stale). */
-
-static void
-overlay_invalidate_all ()
-{
- struct objfile *objfile;
- struct obj_section *sect;
-
- ALL_OBJSECTIONS (objfile, sect)
- if (section_is_overlay (sect->the_bfd_section))
- sect->ovly_mapped = -1;
-}
-
-/* Function: overlay_is_mapped (SECTION)
- Returns true if section is an overlay, and is currently mapped.
- Private: public access is thru function section_is_mapped.
-
- Access to the ovly_mapped flag is restricted to this function, so
- that we can do automatic update. If the global flag
- OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
- overlay_invalidate_all. If the mapped state of the particular
- section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
-
-static int
-overlay_is_mapped (osect)
- struct obj_section *osect;
-{
- if (osect == 0 || !section_is_overlay (osect->the_bfd_section))
- return 0;
-
- switch (overlay_debugging)
- {
- default:
- case 0: return 0; /* overlay debugging off */
- case -1: /* overlay debugging automatic */
- /* Unles there is a target_overlay_update function,
- there's really nothing useful to do here (can't really go auto) */
- if (target_overlay_update)
- {
- if (overlay_cache_invalid)
- {
- overlay_invalidate_all ();
- overlay_cache_invalid = 0;
- }
- if (osect->ovly_mapped == -1)
- (*target_overlay_update) (osect);
- }
- /* fall thru to manual case */
- case 1: /* overlay debugging manual */
- return osect->ovly_mapped == 1;
- }
-}
-
-/* Function: section_is_mapped
- Returns true if section is an overlay, and is currently mapped. */
-
-int
-section_is_mapped (section)
- asection *section;
-{
- struct objfile *objfile;
- struct obj_section *osect;
-
- if (overlay_debugging)
- if (section && section_is_overlay (section))
- ALL_OBJSECTIONS (objfile, osect)
- if (osect->the_bfd_section == section)
- return overlay_is_mapped (osect);
-
- return 0;
-}
-
-/* Function: pc_in_unmapped_range
- If PC falls into the lma range of SECTION, return true, else false. */
-
-CORE_ADDR
-pc_in_unmapped_range (pc, section)
- CORE_ADDR pc;
- asection *section;
-{
- int size;
-
- if (overlay_debugging)
- if (section && section_is_overlay (section))
- {
- size = bfd_get_section_size_before_reloc (section);
- if (section->lma <= pc && pc < section->lma + size)
- return 1;
- }
- return 0;
-}
-
-/* Function: pc_in_mapped_range
- If PC falls into the vma range of SECTION, return true, else false. */
-
-CORE_ADDR
-pc_in_mapped_range (pc, section)
- CORE_ADDR pc;
- asection *section;
-{
- int size;
-
- if (overlay_debugging)
- if (section && section_is_overlay (section))
- {
- size = bfd_get_section_size_before_reloc (section);
- if (section->vma <= pc && pc < section->vma + size)
- return 1;
- }
- return 0;
-}
-
-/* Function: overlay_unmapped_address (PC, SECTION)
- Returns the address corresponding to PC in the unmapped (load) range.
- May be the same as PC. */
-
-CORE_ADDR
-overlay_unmapped_address (pc, section)
- CORE_ADDR pc;
- asection *section;
-{
- if (overlay_debugging)
- if (section && section_is_overlay (section) &&
- pc_in_mapped_range (pc, section))
- return pc + section->lma - section->vma;
-
- return pc;
-}
-
-/* Function: overlay_mapped_address (PC, SECTION)
- Returns the address corresponding to PC in the mapped (runtime) range.
- May be the same as PC. */
-
-CORE_ADDR
-overlay_mapped_address (pc, section)
- CORE_ADDR pc;
- asection *section;
-{
- if (overlay_debugging)
- if (section && section_is_overlay (section) &&
- pc_in_unmapped_range (pc, section))
- return pc + section->vma - section->lma;
-
- return pc;
-}
-
-
-/* Function: symbol_overlayed_address
- Return one of two addresses (relative to the VMA or to the LMA),
- depending on whether the section is mapped or not. */
-
-CORE_ADDR
-symbol_overlayed_address (address, section)
- CORE_ADDR address;
- asection *section;
-{
- if (overlay_debugging)
- {
- /* If the symbol has no section, just return its regular address. */
- if (section == 0)
- return address;
- /* If the symbol's section is not an overlay, just return its address */
- if (!section_is_overlay (section))
- return address;
- /* If the symbol's section is mapped, just return its address */
- if (section_is_mapped (section))
- return address;
- /*
- * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
- * then return its LOADED address rather than its vma address!!
- */
- return overlay_unmapped_address (address, section);
- }
- return address;
-}
-
-/* Function: find_pc_overlay (PC)
- Return the best-match overlay section for PC:
- If PC matches a mapped overlay section's VMA, return that section.
- Else if PC matches an unmapped section's VMA, return that section.
- Else if PC matches an unmapped section's LMA, return that section. */
-
-asection *
-find_pc_overlay (pc)
- CORE_ADDR pc;
-{
- struct objfile *objfile;
- struct obj_section *osect, *best_match = NULL;
-
- if (overlay_debugging)
- ALL_OBJSECTIONS (objfile, osect)
- if (section_is_overlay (osect->the_bfd_section))
- {
- if (pc_in_mapped_range (pc, osect->the_bfd_section))
- {
- if (overlay_is_mapped (osect))
- return osect->the_bfd_section;
- else
- best_match = osect;
- }
- else if (pc_in_unmapped_range (pc, osect->the_bfd_section))
- best_match = osect;
- }
- return best_match ? best_match->the_bfd_section : NULL;
-}
-
-/* Function: find_pc_mapped_section (PC)
- If PC falls into the VMA address range of an overlay section that is
- currently marked as MAPPED, return that section. Else return NULL. */
-
-asection *
-find_pc_mapped_section (pc)
- CORE_ADDR pc;
-{
- struct objfile *objfile;
- struct obj_section *osect;
-
- if (overlay_debugging)
- ALL_OBJSECTIONS (objfile, osect)
- if (pc_in_mapped_range (pc, osect->the_bfd_section) &&
- overlay_is_mapped (osect))
- return osect->the_bfd_section;
-
- return NULL;
-}
-
-/* Function: list_overlays_command
- Print a list of mapped sections and their PC ranges */
-
-void
-list_overlays_command (args, from_tty)
- char *args;
- int from_tty;
-{
- int nmapped = 0;
- struct objfile *objfile;
- struct obj_section *osect;
-
- if (overlay_debugging)
- ALL_OBJSECTIONS (objfile, osect)
- if (overlay_is_mapped (osect))
- {
- const char *name;
- bfd_vma lma, vma;
- int size;
-
- vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section);
- lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section);
- size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
- name = bfd_section_name (objfile->obfd, osect->the_bfd_section);
-
- printf_filtered ("Section %s, loaded at ", name);
- print_address_numeric (lma, 1, stdout);
- puts_filtered (" - ");
- print_address_numeric (lma + size, 1, stdout);
- printf_filtered (", mapped at ");
- print_address_numeric (vma, 1, stdout);
- puts_filtered (" - ");
- print_address_numeric (vma + size, 1, stdout);
- puts_filtered ("\n");
-
- nmapped ++;
- }
- if (nmapped == 0)
- printf_filtered ("No sections are mapped.\n");
-}
-
-/* Function: map_overlay_command
- Mark the named section as mapped (ie. residing at its VMA address). */
-
-void
-map_overlay_command (args, from_tty)
- char *args;
- int from_tty;
-{
- struct objfile *objfile, *objfile2;
- struct obj_section *sec, *sec2;
- asection *bfdsec;
-
- if (!overlay_debugging)
- error ("Overlay debugging not enabled. Use the 'OVERLAY ON' command.");
-
- if (args == 0 || *args == 0)
- error ("Argument required: name of an overlay section");
-
- /* First, find a section matching the user supplied argument */
- ALL_OBJSECTIONS (objfile, sec)
- if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
- {
- /* Now, check to see if the section is an overlay. */
- bfdsec = sec->the_bfd_section;
- if (!section_is_overlay (bfdsec))
- continue; /* not an overlay section */
-
- /* Mark the overlay as "mapped" */
- sec->ovly_mapped = 1;
-
- /* Next, make a pass and unmap any sections that are
- overlapped by this new section: */
- ALL_OBJSECTIONS (objfile2, sec2)
- if (sec2->ovly_mapped &&
- sec != sec2 &&
- sec->the_bfd_section != sec2->the_bfd_section &&
- (pc_in_mapped_range (sec2->addr, sec->the_bfd_section) ||
- pc_in_mapped_range (sec2->endaddr, sec->the_bfd_section)))
- {
- if (info_verbose)
- printf_filtered ("Note: section %s unmapped by overlap\n",
- bfd_section_name (objfile->obfd,
- sec2->the_bfd_section));
- sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2 */
- }
- return;
- }
- error ("No overlay section called %s", args);
-}
-
-/* Function: unmap_overlay_command
- Mark the overlay section as unmapped
- (ie. resident in its LMA address range, rather than the VMA range). */
-
-void
-unmap_overlay_command (args, from_tty)
- char *args;
- int from_tty;
-{
- struct objfile *objfile;
- struct obj_section *sec;
-
- if (!overlay_debugging)
- error ("Overlay debugging not enabled. Use the 'OVERLAY ON' command.");
-
- if (args == 0 || *args == 0)
- error ("Argument required: name of an overlay section");
-
- /* First, find a section matching the user supplied argument */
- ALL_OBJSECTIONS (objfile, sec)
- if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
- {
- if (!sec->ovly_mapped)
- error ("Section %s is not mapped", args);
- sec->ovly_mapped = 0;
- return;
- }
- error ("No overlay section called %s", args);
-}
-
-/* Function: overlay_auto_command
- A utility command to turn on overlay debugging.
- Possibly this should be done via a set/show command. */
-
-static void
-overlay_auto_command (args, from_tty)
- char *args;
- int from_tty;
-{
- overlay_debugging = -1;
- if (info_verbose)
- printf_filtered ("Automatic overlay debugging enabled.");
-}
-
-/* Function: overlay_manual_command
- A utility command to turn on overlay debugging.
- Possibly this should be done via a set/show command. */
-
-static void
-overlay_manual_command (args, from_tty)
- char *args;
- int from_tty;
-{
- overlay_debugging = 1;
- if (info_verbose)
- printf_filtered ("Overlay debugging enabled.");
-}
-
-/* Function: overlay_off_command
- A utility command to turn on overlay debugging.
- Possibly this should be done via a set/show command. */
-
-static void
-overlay_off_command (args, from_tty)
- char *args;
- int from_tty;
-{
- overlay_debugging = 0;
- if (info_verbose)
- printf_filtered ("Overlay debugging disabled.");
-}
-
-static void
-overlay_load_command (args, from_tty)
- char *args;
- int from_tty;
-{
- if (target_overlay_update)
- (*target_overlay_update) (NULL);
- else
- error ("This target does not know how to read its overlay state.");
-}
-
-/* Function: overlay_command
- A place-holder for a mis-typed command */
-
-/* Command list chain containing all defined "overlay" subcommands. */
-struct cmd_list_element *overlaylist;
-
-static void
-overlay_command (args, from_tty)
- char *args;
- int from_tty;
-{
- printf_unfiltered
- ("\"overlay\" must be followed by the name of an overlay command.\n");
- help_list (overlaylist, "overlay ", -1, gdb_stdout);
-}
-
-
-/* Target Overlays for the "Simplest" overlay manager:
-
- This is GDB's default target overlay layer. It works with the
- minimal overlay manager supplied as an example by Cygnus. The
- entry point is via a function pointer "target_overlay_update",
- so targets that use a different runtime overlay manager can
- substitute their own overlay_update function and take over the
- function pointer.
-
- The overlay_update function pokes around in the target's data structures
- to see what overlays are mapped, and updates GDB's overlay mapping with
- this information.
-
- In this simple implementation, the target data structures are as follows:
- unsigned _novlys; /# number of overlay sections #/
- unsigned _ovly_table[_novlys][4] = {
- {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
- {..., ..., ..., ...},
- }
- unsigned _novly_regions; /# number of overlay regions #/
- unsigned _ovly_region_table[_novly_regions][3] = {
- {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
- {..., ..., ...},
- }
- These functions will attempt to update GDB's mappedness state in the
- symbol section table, based on the target's mappedness state.
-
- To do this, we keep a cached copy of the target's _ovly_table, and
- attempt to detect when the cached copy is invalidated. The main
- entry point is "simple_overlay_update(SECT), which looks up SECT in
- the cached table and re-reads only the entry for that section from
- the target (whenever possible).
- */
-
-/* Cached, dynamically allocated copies of the target data structures: */
-static unsigned (*cache_ovly_table)[4] = 0;
-#if 0
-static unsigned (*cache_ovly_region_table)[3] = 0;
-#endif
-static unsigned cache_novlys = 0;
-#if 0
-static unsigned cache_novly_regions = 0;
-#endif
-static CORE_ADDR cache_ovly_table_base = 0;
-#if 0
-static CORE_ADDR cache_ovly_region_table_base = 0;
-#endif
-enum ovly_index { VMA, SIZE, LMA, MAPPED};
-#define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
-
-/* Throw away the cached copy of _ovly_table */
-static void
-simple_free_overlay_table ()
-{
- if (cache_ovly_table)
- free(cache_ovly_table);
- cache_novlys = 0;
- cache_ovly_table = NULL;
- cache_ovly_table_base = 0;
-}
-
-#if 0
-/* Throw away the cached copy of _ovly_region_table */
-static void
-simple_free_overlay_region_table ()
-{
- if (cache_ovly_region_table)
- free(cache_ovly_region_table);
- cache_novly_regions = 0;
- cache_ovly_region_table = NULL;
- cache_ovly_region_table_base = 0;
-}
-#endif
-
-/* Read an array of ints from the target into a local buffer.
- Convert to host order. int LEN is number of ints */
-static void
-read_target_long_array (memaddr, myaddr, len)
- CORE_ADDR memaddr;
- unsigned int *myaddr;
- int len;
-{
- char *buf = alloca (len * TARGET_LONG_BYTES);
- int i;
-
- read_memory (memaddr, buf, len * TARGET_LONG_BYTES);
- for (i = 0; i < len; i++)
- myaddr[i] = extract_unsigned_integer (TARGET_LONG_BYTES * i + buf,
- TARGET_LONG_BYTES);
-}
-
-/* Find and grab a copy of the target _ovly_table
- (and _novlys, which is needed for the table's size) */
-static int
-simple_read_overlay_table ()
-{
- struct minimal_symbol *msym;
-
- simple_free_overlay_table ();
- msym = lookup_minimal_symbol ("_novlys", 0, 0);
- if (msym != NULL)
- cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4);
- else
- return 0; /* failure */
- cache_ovly_table = (void *) xmalloc (cache_novlys * sizeof(*cache_ovly_table));
- if (cache_ovly_table != NULL)
- {
- msym = lookup_minimal_symbol ("_ovly_table", 0, 0);
- if (msym != NULL)
- {
- cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (msym);
- read_target_long_array (cache_ovly_table_base,
- (int *) cache_ovly_table,
- cache_novlys * 4);
- }
- else
- return 0; /* failure */
- }
- else
- return 0; /* failure */
- return 1; /* SUCCESS */
-}
-
-#if 0
-/* Find and grab a copy of the target _ovly_region_table
- (and _novly_regions, which is needed for the table's size) */
-static int
-simple_read_overlay_region_table ()
-{
- struct minimal_symbol *msym;
-
- simple_free_overlay_region_table ();
- msym = lookup_minimal_symbol ("_novly_regions", 0, 0);
- if (msym != NULL)
- cache_novly_regions = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4);
- else
- return 0; /* failure */
- cache_ovly_region_table = (void *) xmalloc (cache_novly_regions * 12);
- if (cache_ovly_region_table != NULL)
- {
- msym = lookup_minimal_symbol ("_ovly_region_table", 0, 0);
- if (msym != NULL)
- {
- cache_ovly_region_table_base = SYMBOL_VALUE_ADDRESS (msym);
- read_target_long_array (cache_ovly_region_table_base,
- (int *) cache_ovly_region_table,
- cache_novly_regions * 3);
- }
- else
- return 0; /* failure */
- }
- else
- return 0; /* failure */
- return 1; /* SUCCESS */
-}
-#endif
-
-/* Function: simple_overlay_update_1
- A helper function for simple_overlay_update. Assuming a cached copy
- of _ovly_table exists, look through it to find an entry whose vma,
- lma and size match those of OSECT. Re-read the entry and make sure
- it still matches OSECT (else the table may no longer be valid).
- Set OSECT's mapped state to match the entry. Return: 1 for
- success, 0 for failure. */
-
-static int
-simple_overlay_update_1 (osect)
- struct obj_section *osect;
-{
- int i, size;
-
- size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
- for (i = 0; i < cache_novlys; i++)
- if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma &&
- cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* &&
- cache_ovly_table[i][SIZE] == size */)
- {
- read_target_long_array (cache_ovly_table_base + i * TARGET_LONG_BYTES,
- (int *) cache_ovly_table[i], 4);
- if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma &&
- cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* &&
- cache_ovly_table[i][SIZE] == size */)
- {
- osect->ovly_mapped = cache_ovly_table[i][MAPPED];
- return 1;
- }
- else /* Warning! Warning! Target's ovly table has changed! */
- return 0;
- }
- return 0;
-}
-
-/* Function: simple_overlay_update
- If OSECT is NULL, then update all sections' mapped state
- (after re-reading the entire target _ovly_table).
- If OSECT is non-NULL, then try to find a matching entry in the
- cached ovly_table and update only OSECT's mapped state.
- If a cached entry can't be found or the cache isn't valid, then
- re-read the entire cache, and go ahead and update all sections. */
-
-static void
-simple_overlay_update (osect)
- struct obj_section *osect;
-{
- struct objfile *objfile;
-
- /* Were we given an osect to look up? NULL means do all of them. */
- if (osect)
- /* Have we got a cached copy of the target's overlay table? */
- if (cache_ovly_table != NULL)
- /* Does its cached location match what's currently in the symtab? */
- if (cache_ovly_table_base ==
- SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", 0, 0)))
- /* Then go ahead and try to look up this single section in the cache */
- if (simple_overlay_update_1 (osect))
- /* Found it! We're done. */
- return;
-
- /* Cached table no good: need to read the entire table anew.
- Or else we want all the sections, in which case it's actually
- more efficient to read the whole table in one block anyway. */
-
- if (simple_read_overlay_table () == 0) /* read failed? No table? */
- {
- warning ("Failed to read the target overlay mapping table.");
- return;
- }
- /* Now may as well update all sections, even if only one was requested. */
- ALL_OBJSECTIONS (objfile, osect)
- if (section_is_overlay (osect->the_bfd_section))
- {
- int i, size;
-
- size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
- for (i = 0; i < cache_novlys; i++)
- if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma &&
- cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* &&
- cache_ovly_table[i][SIZE] == size */)
- { /* obj_section matches i'th entry in ovly_table */
- osect->ovly_mapped = cache_ovly_table[i][MAPPED];
- break; /* finished with inner for loop: break out */
- }
- }
-}
-
-
-void
-_initialize_symfile ()
-{
- struct cmd_list_element *c;
-
- c = add_cmd ("symbol-file", class_files, symbol_file_command,
- "Load symbol table from executable file FILE.\n\
-The `file' command can also load symbol tables, as well as setting the file\n\
-to execute.", &cmdlist);
- c->completer = filename_completer;
-
- c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command,
- "Usage: add-symbol-file FILE ADDR\n\
-Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
-ADDR is the starting address of the file's text.",
- &cmdlist);
- c->completer = filename_completer;
-
- c = add_cmd ("add-shared-symbol-files", class_files,
- add_shared_symbol_files_command,
- "Load the symbols from shared objects in the dynamic linker's link map.",
- &cmdlist);
- c = add_alias_cmd ("assf", "add-shared-symbol-files", class_files, 1,
- &cmdlist);
-
- c = add_cmd ("load", class_files, load_command,
- "Dynamically load FILE into the running program, and record its symbols\n\
-for access from GDB.", &cmdlist);
- c->completer = filename_completer;
-
- add_show_from_set
- (add_set_cmd ("symbol-reloading", class_support, var_boolean,
- (char *)&symbol_reloading,
- "Set dynamic symbol table reloading multiple times in one run.",
- &setlist),
- &showlist);
-
- add_prefix_cmd ("overlay", class_support, overlay_command,
- "Commands for debugging overlays.", &overlaylist,
- "overlay ", 0, &cmdlist);
-
- add_com_alias ("ovly", "overlay", class_alias, 1);
- add_com_alias ("ov", "overlay", class_alias, 1);
-
- add_cmd ("map-overlay", class_support, map_overlay_command,
- "Assert that an overlay section is mapped.", &overlaylist);
-
- add_cmd ("unmap-overlay", class_support, unmap_overlay_command,
- "Assert that an overlay section is unmapped.", &overlaylist);
-
- add_cmd ("list-overlays", class_support, list_overlays_command,
- "List mappings of overlay sections.", &overlaylist);
-
- add_cmd ("manual", class_support, overlay_manual_command,
- "Enable overlay debugging.", &overlaylist);
- add_cmd ("off", class_support, overlay_off_command,
- "Disable overlay debugging.", &overlaylist);
- add_cmd ("auto", class_support, overlay_auto_command,
- "Enable automatic overlay debugging.", &overlaylist);
- add_cmd ("load-target", class_support, overlay_load_command,
- "Read the overlay mapping state from the target.", &overlaylist);
-
- /* Filename extension to source language lookup table: */
- init_filename_language_table ();
- c = add_set_cmd ("extension-language", class_files, var_string_noescape,
- (char *) &ext_args,
- "Set mapping between filename extension and source language.\n\
-Usage: set extension-language .foo bar",
- &setlist);
- c->function.cfunc = set_ext_lang_command;
-
- add_info ("extensions", info_ext_lang_command,
- "All filename extensions associated with a source language.");
-}