3063 lines
91 KiB
C
3063 lines
91 KiB
C
/* Generic symbol file reading for the GNU debugger, GDB.
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Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998
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Free Software Foundation, Inc.
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Contributed by Cygnus Support, using pieces from other GDB modules.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "symtab.h"
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#include "gdbtypes.h"
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#include "gdbcore.h"
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#include "frame.h"
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#include "target.h"
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#include "value.h"
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#include "symfile.h"
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#include "objfiles.h"
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#include "gdbcmd.h"
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#include "breakpoint.h"
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#include "language.h"
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#include "complaints.h"
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#include "demangle.h"
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#include "inferior.h" /* for write_pc */
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#include "gdb-stabs.h"
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#include "obstack.h"
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#include <assert.h>
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#include <sys/types.h>
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#include <fcntl.h>
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#include "gdb_string.h"
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#include "gdb_stat.h"
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#include <ctype.h>
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#include <time.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifndef O_BINARY
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#define O_BINARY 0
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#endif
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#ifdef HPUXHPPA
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/* Some HP-UX related globals to clear when a new "main"
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symbol file is loaded. HP-specific. */
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extern int hp_som_som_object_present;
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extern int hp_cxx_exception_support_initialized;
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#define RESET_HP_UX_GLOBALS() do {\
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hp_som_som_object_present = 0; /* indicates HP-compiled code */ \
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hp_cxx_exception_support_initialized = 0; /* must reinitialize exception stuff */ \
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} while (0)
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#endif
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int (*ui_load_progress_hook) PARAMS ((char *, unsigned long));
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void (*pre_add_symbol_hook) PARAMS ((char *));
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void (*post_add_symbol_hook) PARAMS ((void));
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/* Global variables owned by this file */
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int readnow_symbol_files; /* Read full symbols immediately */
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struct complaint oldsyms_complaint =
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{
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"Replacing old symbols for `%s'", 0, 0
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};
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struct complaint empty_symtab_complaint =
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{
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"Empty symbol table found for `%s'", 0, 0
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};
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/* External variables and functions referenced. */
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extern int info_verbose;
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extern void report_transfer_performance PARAMS ((unsigned long,
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time_t, time_t));
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/* Functions this file defines */
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#if 0
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static int simple_read_overlay_region_table PARAMS ((void));
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static void simple_free_overlay_region_table PARAMS ((void));
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#endif
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static void set_initial_language PARAMS ((void));
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static void load_command PARAMS ((char *, int));
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static void add_symbol_file_command PARAMS ((char *, int));
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static void add_shared_symbol_files_command PARAMS ((char *, int));
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static void cashier_psymtab PARAMS ((struct partial_symtab *));
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static int compare_psymbols PARAMS ((const void *, const void *));
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static int compare_symbols PARAMS ((const void *, const void *));
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bfd *symfile_bfd_open PARAMS ((char *));
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static void find_sym_fns PARAMS ((struct objfile *));
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static void decrement_reading_symtab PARAMS ((void *));
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static void overlay_invalidate_all PARAMS ((void));
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static int overlay_is_mapped PARAMS ((struct obj_section *));
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void list_overlays_command PARAMS ((char *, int));
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void map_overlay_command PARAMS ((char *, int));
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void unmap_overlay_command PARAMS ((char *, int));
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static void overlay_auto_command PARAMS ((char *, int));
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static void overlay_manual_command PARAMS ((char *, int));
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static void overlay_off_command PARAMS ((char *, int));
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static void overlay_load_command PARAMS ((char *, int));
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static void overlay_command PARAMS ((char *, int));
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static void simple_free_overlay_table PARAMS ((void));
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static void read_target_long_array PARAMS ((CORE_ADDR, unsigned int *, int));
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static int simple_read_overlay_table PARAMS ((void));
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static int simple_overlay_update_1 PARAMS ((struct obj_section *));
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static void add_filename_language PARAMS ((char *ext, enum language lang));
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static void set_ext_lang_command PARAMS ((char *args, int from_tty));
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static void info_ext_lang_command PARAMS ((char *args, int from_tty));
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static void init_filename_language_table PARAMS ((void));
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void _initialize_symfile PARAMS ((void));
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/* List of all available sym_fns. On gdb startup, each object file reader
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calls add_symtab_fns() to register information on each format it is
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prepared to read. */
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static struct sym_fns *symtab_fns = NULL;
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/* Flag for whether user will be reloading symbols multiple times.
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Defaults to ON for VxWorks, otherwise OFF. */
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#ifdef SYMBOL_RELOADING_DEFAULT
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int symbol_reloading = SYMBOL_RELOADING_DEFAULT;
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#else
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int symbol_reloading = 0;
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#endif
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/* If non-zero, then on HP-UX (i.e., platforms that use somsolib.c),
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this variable is interpreted as a threshhold. If adding a new
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library's symbol table to those already known to the debugger would
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exceed this threshhold, then the shlib's symbols are not added.
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If non-zero on other platforms, shared library symbols will be added
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automatically when the inferior is created, new libraries are loaded,
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or when attaching to the inferior. This is almost always what users
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will want to have happen; but for very large programs, the startup
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time will be excessive, and so if this is a problem, the user can
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clear this flag and then add the shared library symbols as needed.
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Note that there is a potential for confusion, since if the shared
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library symbols are not loaded, commands like "info fun" will *not*
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report all the functions that are actually present.
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Note that HP-UX interprets this variable to mean, "threshhold size
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in megabytes, where zero means never add". Other platforms interpret
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this variable to mean, "always add if non-zero, never add if zero."
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*/
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int auto_solib_add = 1;
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/* Since this function is called from within qsort, in an ANSI environment
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it must conform to the prototype for qsort, which specifies that the
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comparison function takes two "void *" pointers. */
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static int
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compare_symbols (s1p, s2p)
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const PTR s1p;
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const PTR s2p;
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{
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register struct symbol **s1, **s2;
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s1 = (struct symbol **) s1p;
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s2 = (struct symbol **) s2p;
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return (STRCMP (SYMBOL_NAME (*s1), SYMBOL_NAME (*s2)));
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}
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/*
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LOCAL FUNCTION
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compare_psymbols -- compare two partial symbols by name
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DESCRIPTION
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Given pointers to pointers to two partial symbol table entries,
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compare them by name and return -N, 0, or +N (ala strcmp).
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Typically used by sorting routines like qsort().
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NOTES
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Does direct compare of first two characters before punting
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and passing to strcmp for longer compares. Note that the
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original version had a bug whereby two null strings or two
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identically named one character strings would return the
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comparison of memory following the null byte.
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*/
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static int
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compare_psymbols (s1p, s2p)
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const PTR s1p;
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const PTR s2p;
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{
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register char *st1 = SYMBOL_NAME (*(struct partial_symbol **) s1p);
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register char *st2 = SYMBOL_NAME (*(struct partial_symbol **) s2p);
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if ((st1[0] - st2[0]) || !st1[0])
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{
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return (st1[0] - st2[0]);
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}
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else if ((st1[1] - st2[1]) || !st1[1])
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{
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return (st1[1] - st2[1]);
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}
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else
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{
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/* Note: I replaced the STRCMP line (commented out below)
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* with a simpler "strcmp()" which compares the 2 strings
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* from the beginning. (STRCMP is a macro which first compares
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* the initial characters, then falls back on strcmp).
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* The reason is that the STRCMP line was tickling a C compiler
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* bug on HP-UX 10.30, which is avoided with the simpler
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* code. The performance gain from the more complicated code
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* is negligible, given that we have already checked the
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* initial 2 characters above. I reported the compiler bug,
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* and once it is fixed the original line can be put back. RT
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*/
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/* return ( STRCMP (st1 + 2, st2 + 2)); */
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return (strcmp (st1, st2));
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}
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}
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void
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sort_pst_symbols (pst)
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struct partial_symtab *pst;
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{
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/* Sort the global list; don't sort the static list */
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qsort (pst->objfile->global_psymbols.list + pst->globals_offset,
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pst->n_global_syms, sizeof (struct partial_symbol *),
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compare_psymbols);
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}
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/* Call sort_block_syms to sort alphabetically the symbols of one block. */
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void
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sort_block_syms (b)
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register struct block *b;
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{
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qsort (&BLOCK_SYM (b, 0), BLOCK_NSYMS (b),
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sizeof (struct symbol *), compare_symbols);
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}
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/* Call sort_symtab_syms to sort alphabetically
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the symbols of each block of one symtab. */
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void
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sort_symtab_syms (s)
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register struct symtab *s;
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{
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register struct blockvector *bv;
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int nbl;
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int i;
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register struct block *b;
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if (s == 0)
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return;
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bv = BLOCKVECTOR (s);
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nbl = BLOCKVECTOR_NBLOCKS (bv);
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for (i = 0; i < nbl; i++)
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{
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b = BLOCKVECTOR_BLOCK (bv, i);
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if (BLOCK_SHOULD_SORT (b))
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sort_block_syms (b);
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}
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}
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/* Make a null terminated copy of the string at PTR with SIZE characters in
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the obstack pointed to by OBSTACKP . Returns the address of the copy.
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Note that the string at PTR does not have to be null terminated, I.E. it
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may be part of a larger string and we are only saving a substring. */
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char *
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obsavestring (ptr, size, obstackp)
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char *ptr;
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int size;
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struct obstack *obstackp;
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{
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register char *p = (char *) obstack_alloc (obstackp, size + 1);
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/* Open-coded memcpy--saves function call time. These strings are usually
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short. FIXME: Is this really still true with a compiler that can
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inline memcpy? */
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{
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register char *p1 = ptr;
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register char *p2 = p;
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char *end = ptr + size;
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while (p1 != end)
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*p2++ = *p1++;
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}
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p[size] = 0;
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return p;
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}
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/* Concatenate strings S1, S2 and S3; return the new string. Space is found
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in the obstack pointed to by OBSTACKP. */
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char *
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obconcat (obstackp, s1, s2, s3)
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struct obstack *obstackp;
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const char *s1, *s2, *s3;
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{
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register int len = strlen (s1) + strlen (s2) + strlen (s3) + 1;
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register char *val = (char *) obstack_alloc (obstackp, len);
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strcpy (val, s1);
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strcat (val, s2);
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strcat (val, s3);
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return val;
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}
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/* True if we are nested inside psymtab_to_symtab. */
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int currently_reading_symtab = 0;
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static void
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decrement_reading_symtab (dummy)
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void *dummy;
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{
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currently_reading_symtab--;
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}
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/* Get the symbol table that corresponds to a partial_symtab.
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This is fast after the first time you do it. In fact, there
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is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
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case inline. */
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struct symtab *
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psymtab_to_symtab (pst)
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register struct partial_symtab *pst;
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{
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/* If it's been looked up before, return it. */
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if (pst->symtab)
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return pst->symtab;
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/* If it has not yet been read in, read it. */
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if (!pst->readin)
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{
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struct cleanup *back_to = make_cleanup (decrement_reading_symtab, NULL);
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currently_reading_symtab++;
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(*pst->read_symtab) (pst);
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do_cleanups (back_to);
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}
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return pst->symtab;
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}
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/* Initialize entry point information for this objfile. */
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void
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init_entry_point_info (objfile)
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struct objfile *objfile;
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{
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/* Save startup file's range of PC addresses to help blockframe.c
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decide where the bottom of the stack is. */
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if (bfd_get_file_flags (objfile->obfd) & EXEC_P)
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{
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/* Executable file -- record its entry point so we'll recognize
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the startup file because it contains the entry point. */
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objfile->ei.entry_point = bfd_get_start_address (objfile->obfd);
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}
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else
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{
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/* Examination of non-executable.o files. Short-circuit this stuff. */
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objfile->ei.entry_point = INVALID_ENTRY_POINT;
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}
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objfile->ei.entry_file_lowpc = INVALID_ENTRY_LOWPC;
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objfile->ei.entry_file_highpc = INVALID_ENTRY_HIGHPC;
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objfile->ei.entry_func_lowpc = INVALID_ENTRY_LOWPC;
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objfile->ei.entry_func_highpc = INVALID_ENTRY_HIGHPC;
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objfile->ei.main_func_lowpc = INVALID_ENTRY_LOWPC;
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objfile->ei.main_func_highpc = INVALID_ENTRY_HIGHPC;
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}
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|
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/* Get current entry point address. */
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CORE_ADDR
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entry_point_address ()
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{
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return symfile_objfile ? symfile_objfile->ei.entry_point : 0;
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}
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||
|
||
/* Remember the lowest-addressed loadable section we've seen.
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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
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||
find_lowest_section (abfd, sect, obj)
|
||
bfd *abfd;
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||
asection *sect;
|
||
PTR obj;
|
||
{
|
||
asection **lowest = (asection **) obj;
|
||
|
||
if (0 == (bfd_get_section_flags (abfd, sect) & SEC_LOAD))
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||
return;
|
||
if (!*lowest)
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*lowest = sect; /* First loadable section */
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||
else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect))
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||
*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)))
|
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*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);
|
||
memset (section_offsets, 0, 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.
|
||
|
||
OBJFILE is where the symbols are to be read from.
|
||
|
||
ADDR is the address where the text segment was loaded, unless the
|
||
objfile is the main symbol file, in which case it is zero.
|
||
|
||
MAINLINE is nonzero if this is the main symbol file, or zero if
|
||
it's an extra symbol file such as dynamically loaded code.
|
||
|
||
VERBO is nonzero if 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 algorithm 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;
|
||
|
||
ALL_OBJFILE_OSECTIONS (objfile, 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, 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 ((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_freeargv (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 ()));
|
||
}
|
||
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, 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);
|
||
add_filename_language (".java", language_java);
|
||
add_filename_language (".class", language_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, gdb_stdout);
|
||
puts_filtered (" - ");
|
||
print_address_numeric (lma + size, 1, gdb_stdout);
|
||
printf_filtered (", mapped at ");
|
||
print_address_numeric (vma, 1, gdb_stdout);
|
||
puts_filtered (" - ");
|
||
print_address_numeric (vma + size, 1, gdb_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.");
|
||
}
|