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This depmod script will create a modules.dep file, just like the depmod

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binary from modutils.  This one, however, can be run on the _host_
system (need not be run on the target) and is fully cross platform, so
even if your target is ARM or powerpc or whatever, this will still
work.  When used to support the new modprobe applet, this allows
busybox to fully supplant modutils for architectures supported by
busybox insmod.
 -Erik
This commit is contained in:
Eric Andersen 2001-07-30 19:32:03 +00:00
parent 3555fd006e
commit c126f8ffb6
2 changed files with 454 additions and 0 deletions
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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 $

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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 $