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-rwxr-xr-xexamples/depmod.pl227
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+#!/usr/bin/perl -w
+# vi: set ts=4:
+# Copyright (c) 2001 David Schleef <ds@schleef.org>
+# Copyright (c) 2001 Erik Andersen <andersen@lineo.com>
+# Copyright (c) 2001 Stuart Hughes <stuarth@lineo.com>
+# This program is free software; you can redistribute it and/or modify it
+# under the same terms as Perl itself.
+
+# TODO -- use strict mode...
+#use strict;
+
+use Getopt::Long;
+use File::Find;
+
+
+# Set up some default values
+
+my $basedir="";
+my $kernel;
+my $kernelsyms;
+my $stdout=1;
+my $verbose=0;
+
+
+# get command-line options
+
+my %opt;
+
+GetOptions(
+ \%opt,
+ "help|h",
+ "basedir|b=s" => \$basedir,
+ "kernel|k=s" => \$kernel,
+ "kernelsyms|F=s" => \$kernelsyms,
+ "stdout|n" => \$stdout,
+ "verbose|v" => \$verbose,
+);
+
+if (defined $opt{help}) {
+ print
+ "$0 [OPTION]... [basedir]\n",
+ "\t-h --help\t\tShow this help screen\n",
+ "\t-b --basedir\t\tModules base directory (defaults to /lib/modules)\n",
+ "\t-k --kernel\t\tKernel binary for the target\n",
+ "\t-F --kernelsyms\t\tKernel symbol file\n",
+ "\t-n --stdout\t\tWrite to stdout instead of modules.dep\n",
+ "\t-v --verbose\t\tPrint out lots of debugging stuff\n",
+ ;
+ exit 1;
+}
+
+if($basedir !~ m-/lib/modules-) {
+ warn "WARNING: base directory does not match ..../lib/modules\n";
+}
+
+# Find the list of .o files living under $basedir
+#if ($verbose) { printf "Locating all modules\n"; }
+my($file) = "";
+my(@liblist) = ();
+find sub {
+ if ( -f $_ && ! -d $_ ) {
+ $file = $File::Find::name;
+ if ( $file =~ /.o$/ ) {
+ push(@liblist, $file);
+ if ($verbose) { printf "$file\n"; }
+ }
+ }
+}, $basedir;
+if ($verbose) { printf "Finished locating modules\n"; }
+
+foreach $obj ( @liblist, $kernel ){
+ # turn the input file name into a target tag name
+ # vmlinux is a special that is only used to resolve symbols
+ if($obj =~ /vmlinux/) {
+ $tgtname = "vmlinux";
+ } else {
+ ($tgtname) = $obj =~ m-(/lib/modules/.*)$-;
+ }
+
+ warn "MODULE = $tgtname\n" if $verbose;
+
+ # get a list of symbols
+ @output=`nm $obj`;
+ $ksymtab=grep m/ __ksymtab/, @output;
+
+ # gather the exported symbols
+ if($ksymtab){
+ # explicitly exported
+ foreach ( @output ) {
+ / __ksymtab_(.*)$/ and do {
+ warn "sym = $1\n" if $verbose;
+ $exp->{$1} = $tgtname;
+ };
+ }
+ } else {
+ # exporting all symbols
+ foreach ( @output) {
+ / [ABCDGRST] (.*)$/ and do {
+ warn "syma = $1\n" if $verbose;
+ $exp->{$1} = $tgtname;
+ };
+ }
+ }
+ # gather the unresolved symbols
+ foreach ( @output ) {
+ !/ __this_module/ && / U (.*)$/ and do {
+ warn "und = $1\n" if $verbose;
+ push @{$dep->{$tgtname}}, $1;
+ };
+ }
+}
+
+
+# reduce dependancies: remove unresolvable and resolved from vmlinux
+# remove duplicates
+foreach $module (keys %$dep) {
+ $mod->{$module} = {};
+ foreach (@{$dep->{$module}}) {
+ if( $exp->{$_} ) {
+ warn "resolved symbol $_ in file $exp->{$_}\n" if $verbose;
+ next if $exp->{$_} =~ /vmlinux/;
+ $mod->{$module}{$exp->{$_}} = 1;
+ } else {
+ warn "unresolved symbol $_ in file $module\n";
+ }
+ }
+}
+
+# resolve the dependancies for each module
+foreach $module ( keys %$mod ) {
+ print "$module:\t";
+ @sorted = sort bydep keys %{$mod->{$module}};
+ print join(" \\\n\t",@sorted);
+# foreach $m (@sorted ) {
+# print "\t$m\n";
+# }
+ print "\n\n";
+}
+
+sub bydep
+{
+ foreach my $f ( keys %{$mod->{$b}} ) {
+ if($f eq $a) {
+ return 1;
+ }
+ }
+ return -1;
+}
+
+
+
+__END__
+
+=head1 NAME
+
+depmod.pl - a cross platform script to generate kernel module dependency
+ lists which can then be used by modprobe.
+
+=head1 SYNOPSIS
+
+depmod.pl [OPTION]... [FILE]...
+
+Example:
+
+ depmod.pl -F linux/System.map target/lib/modules
+
+=head1 DESCRIPTION
+
+The purpose of this script is to automagically generate a list of of kernel
+module dependancies. This script produces dependancy lists that should be
+identical to the depmod program from the modutils package. Unlike the depmod
+binary, however, depmod.pl is designed to be run on your host system, not
+on your target system.
+
+This script was written by David Schleef <ds@schleef.org> to be used in
+conjunction with the BusyBox modprobe applet.
+
+=head1 OPTIONS
+
+=over 4
+
+=item B<-h --help>
+
+This displays the help message.
+
+=item B<-b --basedir>
+
+The base directory uner which the target's modules will be found. This
+defaults to the /lib/modules directory.
+
+=item B<-k --kernel>
+
+Kernel binary for the target. You must either supply a kernel binary
+or a kernel symbol file (using the -F option).
+
+=item B<-F --kernelsyms>
+
+Kernel symbol file for the target. You must supply either a kernel symbol file
+kernel binary for the target (using the -k option).
+
+=item B<-n --stdout>
+
+Write to stdout instead of modules.dep. This is currently hard coded...
+kernel binary for the target (using the -k option).
+
+=item B<--verbose>
+
+Be verbose (not implemented)
+
+=back
+
+=head1 COPYRIGHT
+
+Copyright (c) 2001 David Schleef <ds@schleef.org>
+Copyright (c) 2001 Erik Andersen <andersen@lineo.com>
+Copyright (c) 2001 Stuart Hughes <stuarth@lineo.com>
+This program is free software; you can redistribute it and/or modify it
+under the same terms as Perl itself.
+
+=head1 AUTHOR
+
+David Schleef <ds@schleef.org>
+
+=cut
+
+# $Id: depmod.pl,v 1.1 2001/07/30 19:32:03 andersen Exp $
+