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Patch from Stuart Hughes upgrading depmod.pl

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This commit is contained in:
Rob Landley
2006-03-21 16:35:50 +00:00
parent 8dd4ca787a
commit d049812571
1 changed files with 158 additions and 104 deletions
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262
examples/depmod.pl
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@@ -2,120 +2,125 @@
# vi: set ts=4:
# Copyright (c) 2001 David Schleef <ds@schleef.org>
# Copyright (c) 2001 Erik Andersen <andersen@codepoet.org>
# Copyright (c) 2001 Stuart Hughes <stuarth@lineo.com>
# 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>
#
# 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 $stdout=0;
my $verbose=0;
my $help=0;
# 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
TXT
# get command-line options
my %opt;
GetOptions(
\%opt,
"help|h",
"basedir|b=s" => \$basedir,
"kernel|k=s" => \$kernel,
"help|h" => \$help,
"basedir|b=s" => \$basedir,
"kernel|k=s" => \$kernel,
"kernelsyms|F=s" => \$kernelsyms,
"stdout|n" => \$stdout,
"verbose|v" => \$verbose,
"stdout|n" => \$stdout,
"verbose|v" => \$verbose,
);
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) = ();
# 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/) {
$tgtname = "vmlinux";
} else {
($tgtname) = $obj =~ m-(/lib/modules/.*)$-;
}
my ($tgtname) = $obj =~ m-(/lib/modules/.*)$-;
warn "MODULE = $tgtname\n" if $verbose;
warn "\nMODULE = $tgtname\n" if $verbose;
# get a list of symbols
@output=`nm $obj`;
$ksymtab=grep m/ __ksymtab/, @output;
my @output=`nm $obj`;
# gather the exported symbols
if($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}}, $1;
};
}
build_ref_tables($tgtname, \@output, $exp, $dep);
}
# reduce dependancies: remove unresolvable and resolved from vmlinux
# 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 dependancies for each module
# reduce dependancies: remove unresolvable and resolved from vmlinux/System.map
# remove duplicates
foreach $module (keys %$dep) {
foreach my $module (keys %$dep) {
warn "reducing module: $module\n" if $verbose;
$mod->{$module} = {};
foreach (@{$dep->{$module}}) {
if( $exp->{$_} ) {
@@ -128,25 +133,65 @@ foreach $module (keys %$dep) {
}
}
# 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->{$module}};
print OFILE join(" \\\n\t",@sorted);
print OFILE "\n\n";
}
# figure out where the output should go
if ($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 {
print "$module: ";
my @sorted = sort bydep keys %{$mod->{$module}};
print join(" ",@sorted);
print "\n";
}
}
sub build_ref_tables
{
my ($name, $sym_ar, $exp, $dep) = @_;
my $ksymtab = grep m/ __ksymtab/, @$sym_ar;
# gather the exported symbols
if($ksymtab){
# explicitly exported
foreach ( @$sym_ar ) {
/ __ksymtab_(.*)$/ and do {
warn "sym = $1\n" if $verbose;
$exp->{$1} = $name;
};
}
} else {
# exporting all symbols
foreach ( @$sym_ar ) {
/ [ABCDGRST] (.*)$/ and do {
warn "syma = $1\n" if $verbose;
$exp->{$1} = $name;
};
}
}
# this takes makes sure modules with no dependencies get listed
push @{$dep->{$name}}, 'printk' unless $name eq 'vmlinux';
# gather the unresolved symbols
foreach ( @$sym_ar ) {
!/ __this_module/ && / U (.*)$/ and do {
warn "und = $1\n" if $verbose;
push @{$dep->{$name}}, $1;
};
}
}
sub bydep
{
foreach my $f ( keys %{$mod->{$b}} ) {
@@ -163,8 +208,11 @@ __END__
=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
@@ -172,7 +220,7 @@ depmod.pl [OPTION]... [basedir]...
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
@@ -196,34 +244,40 @@ 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.
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@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>
Copyright (c) 2001 David Schleef <ds@schleef.org>
Copyright (c) 2001 Erik Andersen <andersen@codepoet.org>
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.