397 lines
10 KiB
C
397 lines
10 KiB
C
/* nm.c -- Describe symbol table of a rel file.
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Copyright 1991, 1992 Free Software Foundation, Inc.
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This file is part of GNU Binutils.
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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., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "bfd.h"
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#include "sysdep.h"
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#include "bucomm.h"
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#include "getopt.h"
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#include "aout/stab_gnu.h"
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#include "aout/ranlib.h"
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static boolean
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display_file PARAMS ((char *filename));
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static void
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do_one_rel_file PARAMS ((bfd* file, bfd *archive));
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static unsigned int
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filter_symbols PARAMS ((bfd *file, asymbol **syms, unsigned long symcount));
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static void
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print_symbols PARAMS ((bfd *file, asymbol **syms, unsigned long symcount,
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bfd *archive));
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static void
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print_symdef_entry PARAMS ((bfd * abfd));
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/* Command options. */
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int external_only = 0; /* print external symbols only */
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int file_on_each_line = 0; /* print file name on each line */
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int no_sort = 0; /* don't sort; print syms in order found */
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int print_debug_syms = 0; /* print debugger-only symbols too */
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int print_armap = 0; /* describe __.SYMDEF data in archive files. */
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int reverse_sort = 0; /* sort in downward(alpha or numeric) order */
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int sort_numerically = 0; /* sort in numeric rather than alpha order */
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int undefined_only = 0; /* print undefined symbols only */
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int show_version = 0; /* show the version number */
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boolean print_each_filename = false; /* Ick. Used in archives. */
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/* IMPORT */
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extern char *program_name;
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extern char *program_version;
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extern char *target;
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extern int print_version;
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struct option long_options[] = {
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{"debug-syms", no_argument, &print_debug_syms, 1},
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{"extern-only", no_argument, &external_only, 1},
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{"no-sort", no_argument, &no_sort, 1},
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{"numeric-sort", no_argument, &sort_numerically, 1},
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{"print-armap", no_argument, &print_armap, 1},
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{"print-file-name", no_argument, &file_on_each_line, 1},
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{"reverse-sort", no_argument, &reverse_sort, 1},
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{"target", optional_argument, 0, 200},
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{"undefined-only", no_argument, &undefined_only, 1},
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{"version", no_argument, &show_version, 1},
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{0, no_argument, 0, 0}
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};
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int show_names = 0;
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/* Some error-reporting functions */
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void
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usage ()
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{
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fprintf(stderr, "nm %s\n\
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Usage: %s [-agnoprsuV] [--debug-syms] [--extern-only] [--print-armap]\n\
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[--print-file-name] [--numeric-sort] [--no-sort] [--reverse-sort]\n\
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[--undefined-only] [--target=bfdname] [file...]\n",
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program_version, program_name);
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exit(1);
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}
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int
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main (argc, argv)
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int argc;
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char **argv;
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{
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int c; /* sez which option char */
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int retval;
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program_name = *argv;
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bfd_init();
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while ((c = getopt_long(argc, argv, "agnoprsuvABV", long_options, (int *) 0)) != EOF) {
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switch (c) {
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case 'a': print_debug_syms = 1; break;
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case 'g': external_only = 1; break;
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case 'n': sort_numerically = 1; break;
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case 'o': file_on_each_line = 1; break;
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case 'p': no_sort = 1; break;
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case 'r': reverse_sort = 1; break;
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case 's': print_armap = 1; break;
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case 'u': undefined_only = 1; break;
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case 'v':
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case 'V': show_version = 1; break;
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/* For MIPS compatibility, -A selects System V style output, -B
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selects BSD style output. These are not implemented. When
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they are, they should be added to usage (). */
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case 'A': break;
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case 'B': break;
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case 200: /* --target */
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target = optarg;
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break;
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default:
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usage ();
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}
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}
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if (show_version)
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printf ("%s version %s\n", program_name, program_version);
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/* Strangely, for the shell you should return only a nonzero value
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on sucess -- the inverse of the C sense. */
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/* OK, all options now parsed. If no filename specified, do a.out. */
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if (optind == argc) return !display_file ("a.out");
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retval = 0;
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show_names = (argc -optind)>1;
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/* We were given several filenames to do: */
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while (optind < argc) {
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if (!display_file (argv[optind++])) {
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retval++;
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}
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}
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return retval;
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}
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/* Display a file's stats */
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/* goto here is marginally cleaner than the nested if syntax */
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static boolean
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display_file (filename)
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char *filename;
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{
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boolean retval = true;
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bfd *file;
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bfd *arfile = NULL;
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file = bfd_openr(filename, target);
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if (file == NULL) {
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fprintf (stderr, "%s: ", program_name);
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bfd_perror (filename);
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return false;
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}
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if (bfd_check_format(file, bfd_object))
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{
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if (show_names) {
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printf ("\n%s:\n",filename);
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}
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do_one_rel_file (file, NULL);
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}
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else if (bfd_check_format (file, bfd_archive)) {
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if (!bfd_check_format (file, bfd_archive)) {
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fprintf (stderr, "%s: %s: unknown format\n", program_name, filename);
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retval = false;
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goto closer;
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}
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if (!file_on_each_line)
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printf("\n%s:\n", filename);
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if (print_armap) print_symdef_entry (file);
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for (;;) {
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arfile = bfd_openr_next_archived_file (file, arfile);
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if (arfile == NULL) {
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if (bfd_error != no_more_archived_files)
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bfd_fatal (filename);
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goto closer;
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}
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if (!bfd_check_format(arfile, bfd_object))
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printf("%s: not an object file\n", arfile->filename);
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else {
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if (!file_on_each_line)
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printf ("\n%s:\n", arfile->filename);
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do_one_rel_file (arfile, file) ;
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}
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}
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}
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else {
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fprintf (stderr, "\n%s: %s: unknown format\n", program_name, filename);
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retval = false;
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}
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closer:
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if (bfd_close(file) == false)
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bfd_fatal (filename);
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return retval;
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}
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/* Symbol-sorting predicates */
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#define valueof(x) ((x)->section->vma + (x)->value)
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int
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numeric_forward (x, y)
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CONST void *x;
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CONST void *y;
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{
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return (valueof(*(asymbol **)x) - valueof(*(asymbol **) y));
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}
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int
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numeric_reverse (x, y)
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CONST void *x;
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CONST void *y;
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{
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return (valueof(*(asymbol **)y) - valueof(*(asymbol **) x));
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}
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int
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non_numeric_forward (x, y)
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CONST void *x;
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CONST void *y;
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{
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CONST char *xn = (*(asymbol **) x)->name;
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CONST char *yn = (*(asymbol **) y)->name;
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return ((xn == NULL) ? ((yn == NULL) ? 0 : -1) :
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((yn == NULL) ? 1 : strcmp (xn, yn)));
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}
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int
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non_numeric_reverse (x, y)
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CONST void *x;
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CONST void *y;
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{
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return -(non_numeric_forward (x, y));
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}
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int (*(sorters[2][2])) PARAMS ((CONST void *, CONST void *)) = {
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{non_numeric_forward, non_numeric_reverse},
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{numeric_forward, numeric_reverse},
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};
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static void
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do_one_rel_file (abfd, archive_bfd)
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bfd *abfd;
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bfd *archive_bfd; /* If non-NULL: archive containing abfd. */
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{
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unsigned int storage;
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asymbol **syms;
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unsigned int symcount = 0;
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if (!(bfd_get_file_flags (abfd) & HAS_SYMS)) {
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(void) printf ("No symbols in \"%s\".\n", bfd_get_filename (abfd));
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return;
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}
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storage = get_symtab_upper_bound (abfd);
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if (storage == 0) {
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nosymz:
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fprintf (stderr, "%s: Symflags set but there are none?\n",
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bfd_get_filename (abfd));
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return;
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}
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syms = (asymbol **) xmalloc (storage);
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symcount = bfd_canonicalize_symtab (abfd, syms);
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if (symcount == 0) goto nosymz;
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/* Discard the symbols we don't want to print.
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It's OK to do this in place; we'll free the storage anyway
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(after printing) */
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symcount = filter_symbols (abfd, syms, symcount);
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if (!no_sort)
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qsort((char *) syms, symcount, sizeof (asymbol *),
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sorters[sort_numerically][reverse_sort]);
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if (print_each_filename && !file_on_each_line)
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printf("\n%s:\n", bfd_get_filename(abfd));
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print_symbols (abfd, syms, symcount, archive_bfd);
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free (syms);
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}
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/* Choose which symbol entries to print;
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compact them downward to get rid of the rest.
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Return the number of symbols to be printed. */
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static unsigned int
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filter_symbols (abfd, syms, symcount)
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bfd *abfd;
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asymbol **syms;
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unsigned long symcount;
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{
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asymbol **from, **to;
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unsigned int dst_count = 0;
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asymbol *sym;
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unsigned int src_count;
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for (from = to = syms, src_count = 0; src_count <symcount; src_count++) {
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int keep = 0;
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flagword flags = (from[src_count])->flags;
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sym = from[src_count];
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if (undefined_only) {
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keep = sym->section == &bfd_und_section;
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} else if (external_only) {
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keep = ((flags & BSF_GLOBAL)
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|| (sym->section == &bfd_und_section)
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|| (bfd_is_com_section (sym->section)));
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} else {
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keep = 1;
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}
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if (!print_debug_syms && ((flags & BSF_DEBUGGING) != 0)) {
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keep = 0;
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}
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if (keep) {
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to[dst_count++] = from[src_count];
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}
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}
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return dst_count;
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}
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static void
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print_symbols (abfd, syms, symcount, archive_bfd)
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bfd *abfd;
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asymbol **syms;
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unsigned long symcount;
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bfd *archive_bfd;
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{
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asymbol **sym = syms, **end = syms + symcount;
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for (; sym < end; ++sym) {
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if (file_on_each_line) {
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if (archive_bfd)
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printf("%s:", bfd_get_filename(archive_bfd));
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printf("%s:", bfd_get_filename(abfd));
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}
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if (undefined_only) {
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if ((*sym)->section == &bfd_und_section)
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puts ((*sym)->name);
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}
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else {
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asymbol *p = *sym;
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if (p) {
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bfd_print_symbol(abfd, stdout, p, bfd_print_symbol_nm);
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putchar('\n');
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}
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}
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}
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}
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static void
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print_symdef_entry (abfd)
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bfd * abfd;
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{
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symindex idx = BFD_NO_MORE_SYMBOLS;
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carsym *thesym;
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boolean everprinted = false;
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for (idx = bfd_get_next_mapent (abfd, idx, &thesym);
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idx != BFD_NO_MORE_SYMBOLS;
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idx = bfd_get_next_mapent (abfd, idx, &thesym)) {
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bfd *elt;
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if (!everprinted) {
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printf ("\nArchive index:\n");
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everprinted = true;
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}
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elt = bfd_get_elt_at_index (abfd, idx);
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if (thesym->name != (char *)NULL) {
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printf ("%s in %s\n", thesym->name, bfd_get_filename (elt));
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}
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}
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}
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