238 lines
5.6 KiB
Perl
Executable File
238 lines
5.6 KiB
Perl
Executable File
#!/usr/bin/perl -w
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# vi: set ts=4:
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# Copyright (c) 2001 David Schleef <ds@schleef.org>
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# Copyright (c) 2001 Erik Andersen <andersen@codepoet.org>
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# Copyright (c) 2001 Stuart Hughes <stuarth@lineo.com>
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# Copyright (c) 2002 Steven J. Hill <shill@broadcom.com>
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# This program is free software; you can redistribute it and/or modify it
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# under the same terms as Perl itself.
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# TODO -- use strict mode...
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#use strict;
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use Getopt::Long;
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use File::Find;
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# Set up some default values
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my $basedir="";
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my $kernel;
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my $kernelsyms;
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my $stdout=0;
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my $verbose=0;
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# get command-line options
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my %opt;
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GetOptions(
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\%opt,
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"help|h",
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"basedir|b=s" => \$basedir,
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"kernel|k=s" => \$kernel,
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"kernelsyms|F=s" => \$kernelsyms,
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"stdout|n" => \$stdout,
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"verbose|v" => \$verbose,
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);
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if (defined $opt{help}) {
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print
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" $0 [OPTION]... [basedir]\n",
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" -h --help\t\tShow this help screen\n",
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" -b --basedir\tModules base directory (defaults to /lib/modules)\n",
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" -k --kernel\tKernel binary for the target\n",
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" -F --kernelsyms\tKernel symbol file\n",
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" -n --stdout\tWrite to stdout instead of <basedir>/modules.dep\n",
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" -v --verbose\tPrint out lots of debugging stuff\n",
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;
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exit 1;
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}
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if($basedir !~ m-/lib/modules-) {
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warn "WARNING: base directory does not match ..../lib/modules\n";
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}
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# Find the list of .o files living under $basedir
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#if ($verbose) { printf "Locating all modules\n"; }
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my($ofile) = "";
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my($file) = "";
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my(@liblist) = ();
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find sub {
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if ( -f $_ && ! -d $_ ) {
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$file = $File::Find::name;
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if ( $file =~ /.o$/ ) {
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push(@liblist, $file);
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if ($verbose) { printf "$file\n"; }
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}
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}
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}, $basedir;
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if ($verbose) { printf "Finished locating modules\n"; }
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foreach $obj ( @liblist, $kernel ){
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# turn the input file name into a target tag name
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# vmlinux is a special that is only used to resolve symbols
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if($obj =~ /vmlinux/) {
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$tgtname = "vmlinux";
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} else {
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($tgtname) = $obj =~ m-(/lib/modules/.*)$-;
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}
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warn "MODULE = $tgtname\n" if $verbose;
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# get a list of symbols
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@output=`nm $obj`;
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$ksymtab=grep m/ __ksymtab/, @output;
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# gather the exported symbols
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if($ksymtab){
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# explicitly exported
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foreach ( @output ) {
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/ __ksymtab_(.*)$/ and do {
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warn "sym = $1\n" if $verbose;
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$exp->{$1} = $tgtname;
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};
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}
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} else {
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# exporting all symbols
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foreach ( @output) {
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/ [ABCDGRST] (.*)$/ and do {
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warn "syma = $1\n" if $verbose;
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$exp->{$1} = $tgtname;
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};
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}
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}
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# gather the unresolved symbols
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foreach ( @output ) {
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!/ __this_module/ && / U (.*)$/ and do {
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warn "und = $1\n" if $verbose;
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push @{$dep->{$tgtname}}, $1;
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};
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}
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}
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# reduce dependancies: remove unresolvable and resolved from vmlinux
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# remove duplicates
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foreach $module (keys %$dep) {
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$mod->{$module} = {};
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foreach (@{$dep->{$module}}) {
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if( $exp->{$_} ) {
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warn "resolved symbol $_ in file $exp->{$_}\n" if $verbose;
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next if $exp->{$_} =~ /vmlinux/;
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$mod->{$module}{$exp->{$_}} = 1;
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} else {
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warn "unresolved symbol $_ in file $module\n";
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}
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}
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}
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# resolve the dependancies for each module
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if ($stdout == 1) {
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foreach $module ( keys %$mod ) {
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print "$module:\t";
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@sorted = sort bydep keys %{$mod->{$module}};
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print join(" \\\n\t",@sorted);
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print "\n\n";
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}
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} else {
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open(OFILE, ">$basedir/modules.dep");
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foreach $module ( keys %$mod ) {
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print OFILE "$module:\t";
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@sorted = sort bydep keys %{$mod->{$module}};
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print OFILE join(" \\\n\t",@sorted);
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print OFILE "\n\n";
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}
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}
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sub bydep
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{
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foreach my $f ( keys %{$mod->{$b}} ) {
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if($f eq $a) {
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return 1;
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}
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}
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return -1;
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}
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__END__
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=head1 NAME
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depmod.pl - a cross platform script to generate kernel module dependency
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lists which can then be used by modprobe.
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=head1 SYNOPSIS
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depmod.pl [OPTION]... [basedir]...
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Example:
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depmod.pl -F linux/System.map target/lib/modules
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=head1 DESCRIPTION
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The purpose of this script is to automagically generate a list of of kernel
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module dependancies. This script produces dependancy lists that should be
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identical to the depmod program from the modutils package. Unlike the depmod
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binary, however, depmod.pl is designed to be run on your host system, not
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on your target system.
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This script was written by David Schleef <ds@schleef.org> to be used in
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conjunction with the BusyBox modprobe applet.
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=head1 OPTIONS
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=over 4
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=item B<-h --help>
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This displays the help message.
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=item B<-b --basedir>
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The base directory uner which the target's modules will be found. This
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defaults to the /lib/modules directory.
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=item B<-k --kernel>
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Kernel binary for the target. You must either supply a kernel binary
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or a kernel symbol file (using the -F option).
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=item B<-F --kernelsyms>
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Kernel symbol file for the target. You must supply either a kernel symbol file
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kernel binary for the target (using the -k option).
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=item B<-n --stdout>
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Write to stdout instead of modules.dep. This is currently hard coded...
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kernel binary for the target (using the -k option).
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=item B<--verbose>
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Be verbose (not implemented)
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=back
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=head1 COPYRIGHT
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Copyright (c) 2001 David Schleef <ds@schleef.org>
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Copyright (c) 2001 Erik Andersen <andersen@codepoet.org>
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Copyright (c) 2001 Stuart Hughes <stuarth@lineo.com>
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This program is free software; you can redistribute it and/or modify it
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under the same terms as Perl itself.
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=head1 AUTHOR
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David Schleef <ds@schleef.org>
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=cut
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# $Id: depmod.pl,v 1.1 2004/12/08 01:34:41 andersen Exp $
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