#!/usr/bin/perl -w
-# vi: set ts=4:
+# vi: set sw=4 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>
+# Copyright (c) 2001 Erik Andersen <andersen@codepoet.org>
+# Copyright (c) 2001 Stuart Hughes <seh@zee2.com>
# Copyright (c) 2002 Steven J. Hill <shill@broadcom.com>
-# This program is free software; you can redistribute it and/or modify it
+# Copyright (c) 2006 Freescale Semiconductor, Inc <stuarth@freescale.com>
+#
+# History:
+# March 2006: Stuart Hughes <stuarth@freescale.com>.
+# Significant updates, including implementing the '-F' option
+# and adding support for 2.6 kernels.
+
+# 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;
-
+use strict;
# Set up some default values
-
+my $kdir="";
my $basedir="";
-my $kernel;
-my $kernelsyms;
+my $kernel="";
+my $kernelsyms="";
+my $symprefix="";
my $stdout=0;
my $verbose=0;
-
+my $help=0;
+my $nm = $ENV{'NM'} || "nm";
+
+# more globals
+my (@liblist) = ();
+my $exp = {};
+my $dep = {};
+my $mod = {};
+
+my $usage = <<TXT;
+$0 -b basedir { -k <vmlinux> | -F <System.map> } [options]...
+ Where:
+ -h --help : Show this help screen
+ -b --basedir : Modules base directory (e.g /lib/modules/<2.x.y>)
+ -k --kernel : Kernel binary for the target (e.g. vmlinux)
+ -F --kernelsyms : Kernel symbol file (e.g. System.map)
+ -n --stdout : Write to stdout instead of <basedir>/modules.dep
+ -v --verbose : Print out lots of debugging stuff
+ -P --symbol-prefix : Symbol prefix
+TXT
# 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,
+ "help|h" => \$help,
+ "basedir|b=s" => \$basedir,
+ "kernel|k=s" => \$kernel,
+ "kernelsyms|F=s" => \$kernelsyms,
+ "stdout|n" => \$stdout,
+ "verbose|v" => \$verbose,
+ "symbol-prefix|P=s" => \$symprefix,
);
-if (defined $opt{help}) {
- print
- " $0 [OPTION]... [basedir]\n",
- " -h --help\t\tShow this help screen\n",
- " -b --basedir\tModules base directory (defaults to /lib/modules)\n",
- " -k --kernel\tKernel binary for the target\n",
- " -F --kernelsyms\tKernel symbol file\n",
- " -n --stdout\tWrite to stdout instead of <basedir>/modules.dep\n",
- " -v --verbose\tPrint out lots of debugging stuff\n",
- ;
- exit 1;
-}
+die $usage if $help;
+die $usage unless $basedir && ( $kernel || $kernelsyms );
+die "can't use both -k and -F\n\n$usage" if $kernel && $kernelsyms;
+# Strip any trailing or multiple slashes from basedir
+$basedir =~ s-(/)\1+-/-g;
+
+# The base directory should contain /lib/modules somewhere
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($ofile) = "";
-my($file) = "";
-my(@liblist) = ();
-find sub {
- if ( -f $_ && ! -d $_ ) {
+# if no kernel version is contained in the basedir, try to find one
+if($basedir !~ m-/lib/modules/\d\.\d-) {
+ opendir(BD, $basedir) or die "can't open basedir $basedir : $!\n";
+ foreach ( readdir(BD) ) {
+ next if /^\.\.?$/;
+ next unless -d "$basedir/$_";
+ warn "dir = $_\n" if $verbose;
+ if( /^\d\.\d/ ) {
+ $kdir = $_;
+ warn("Guessed module directory as $basedir/$kdir\n");
+ last;
+ }
+ }
+ closedir(BD);
+ die "Cannot find a kernel version under $basedir\n" unless $kdir;
+ $basedir = "$basedir/$kdir";
+}
+
+# Find the list of .o or .ko files living under $basedir
+warn "**** Locating all modules\n" if $verbose;
+find sub {
+ my $file;
+ if ( -f $_ && ! -d $_ ) {
$file = $File::Find::name;
- if ( $file =~ /.o$/ ) {
+ if ( $file =~ /\.k?o$/ ) {
push(@liblist, $file);
- if ($verbose) { printf "$file\n"; }
+ warn "$file\n" if $verbose;
}
}
}, $basedir;
-if ($verbose) { printf "Finished locating modules\n"; }
+warn "**** Finished locating modules\n" if $verbose;
-foreach $obj ( @liblist, $kernel ){
+foreach my $obj ( @liblist ){
# turn the input file name into a target tag name
- # vmlinux is a special that is only used to resolve symbols
- if($obj =~ /vmlinux/) {
- $tgtname = "vmlinux";
+ my ($tgtname) = $obj =~ m-(/lib/modules/.*)$-;
+
+ warn "\nMODULE = $tgtname\n" if $verbose;
+
+ # get a list of symbols
+ my @output=`$nm $obj`;
+
+ build_ref_tables($tgtname, \@output, $exp, $dep);
+}
+
+
+# vmlinux is a special name that is only used to resolve symbols
+my $tgtname = 'vmlinux';
+my @output = $kernelsyms ? `cat $kernelsyms` : `$nm $kernel`;
+warn "\nMODULE = $tgtname\n" if $verbose;
+build_ref_tables($tgtname, \@output, $exp, $dep);
+
+# resolve the dependencies for each module
+# reduce dependencies: remove unresolvable and resolved from vmlinux/System.map
+# remove duplicates
+foreach my $module (keys %$dep) {
+ warn "reducing module: $module\n" if $verbose;
+ $mod->{$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 $module\n";
+ }
+ }
+}
+
+# figure out where the output should go
+if ($stdout == 0) {
+ open(STDOUT, ">$basedir/modules.dep")
+ or die "cannot open $basedir/modules.dep: $!";
+}
+my $kseries = $basedir =~ m,/2\.6\.[^/]*, ? '2.6' : '2.4';
+
+foreach my $module ( keys %$mod ) {
+ if($kseries eq '2.4') {
+ print "$module:\t";
+ my @sorted = sort bydep keys %{$mod->{$module}};
+ print join(" \\\n\t",@sorted);
+ print "\n\n";
} else {
- ($tgtname) = $obj =~ m-(/lib/modules/.*)$-;
+ print "$module: ";
+ my @sorted = sort bydep keys %{$mod->{$module}};
+ print join(" ",@sorted);
+ print "\n";
}
+}
- warn "MODULE = $tgtname\n" if $verbose;
- # get a list of symbols
- @output=`nm $obj`;
- $ksymtab=grep m/ __ksymtab/, @output;
+sub build_ref_tables
+{
+ my ($name, $sym_ar, $exp, $dep) = @_;
+
+ my $ksymtab = grep m/ __ksymtab/, @$sym_ar;
# gather the exported symbols
if($ksymtab){
# explicitly exported
- foreach ( @output ) {
+ foreach ( @$sym_ar ) {
/ __ksymtab_(.*)$/ and do {
warn "sym = $1\n" if $verbose;
- $exp->{$1} = $tgtname;
+ $exp->{$1} = $name;
};
}
} else {
# exporting all symbols
- foreach ( @output) {
- / [ABCDGRST] (.*)$/ and do {
+ foreach ( @$sym_ar ) {
+ / [ABCDGRSTW] (.*)$/ and do {
warn "syma = $1\n" if $verbose;
- $exp->{$1} = $tgtname;
+ $exp->{$1} = $name;
};
}
}
+
+ # this takes makes sure modules with no dependencies get listed
+ push @{$dep->{$name}}, $symprefix . 'printk' unless $name eq 'vmlinux';
+
# gather the unresolved symbols
- foreach ( @output ) {
+ foreach ( @$sym_ar ) {
!/ __this_module/ && / U (.*)$/ and do {
warn "und = $1\n" if $verbose;
- push @{$dep->{$tgtname}}, $1;
+ push @{$dep->{$name}}, $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 $module\n";
- }
- }
-}
-
-# resolve the dependancies for each module
-if ($stdout == 1) {
- foreach $module ( keys %$mod ) {
- print "$module:\t";
- @sorted = sort bydep keys %{$mod->{$module}};
- print join(" \\\n\t",@sorted);
- print "\n\n";
- }
-} else {
- open(OFILE, ">$basedir/modules.dep");
- foreach $module ( keys %$mod ) {
- print OFILE "$module:\t";
- @sorted = sort bydep keys %{$mod->{$module}};
- print OFILE join(" \\\n\t",@sorted);
- print OFILE "\n\n";
- }
-}
-
-
sub bydep
{
foreach my $f ( keys %{$mod->{$b}} ) {
=head1 NAME
-depmod.pl - a cross platform script to generate kernel module dependency
- lists which can then be used by modprobe.
+depmod.pl - a cross platform script to generate kernel module
+dependency lists (modules.conf) which can then be used by modprobe
+on the target platform.
+
+It supports Linux 2.4 and 2.6 styles of modules.conf (auto-detected)
=head1 SYNOPSIS
Example:
- depmod.pl -F linux/System.map target/lib/modules
+ depmod.pl -F linux/System.map -b target/lib/modules/2.6.11
=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
+module dependencies. This script produces dependency 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.
The base directory uner which the target's modules will be found. This
defaults to the /lib/modules directory.
+If you don't specify the kernel version, this script will search for
+one under the specified based directory and use the first thing that
+looks like a kernel version.
+
=item B<-k --kernel>
-Kernel binary for the target. You must either supply a kernel binary
+Kernel binary for the target (vmlinux). 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).
+Kernel symbol file for the target (System.map).
=item B<-n --stdout>
-Write to stdout instead of modules.dep. This is currently hard coded...
+Write to stdout instead of modules.dep
kernel binary for the target (using the -k option).
=item B<--verbose>
-Be verbose (not implemented)
+Verbose (debug) output
=back
-=head1 COPYRIGHT
+=head1 COPYRIGHT AND LICENSE
-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
+ Copyright (c) 2001 David Schleef <ds@schleef.org>
+ Copyright (c) 2001 Erik Andersen <andersen@codepoet.org>
+ Copyright (c) 2001 Stuart Hughes <seh@zee2.com>
+ Copyright (c) 2002 Steven J. Hill <shill@broadcom.com>
+ Copyright (c) 2006 Freescale Semiconductor, Inc <stuarth@freescale.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 1.2 2002/10/08 21:33:51 sjhill Exp $
-
projects / oweals / busybox.git / blobdiff