diff options
Diffstat (limited to 'release/src/router/busybox/examples/depmod.pl')
| -rwxr-xr-x | release/src/router/busybox/examples/depmod.pl | 343 |
1 files changed, 228 insertions, 115 deletions
diff --git a/release/src/router/busybox/examples/depmod.pl b/release/src/router/busybox/examples/depmod.pl index c4964e7a..6b5ce2f5 100755 --- a/release/src/router/busybox/examples/depmod.pl +++ b/release/src/router/busybox/examples/depmod.pl @@ -1,152 +1,259 @@ #!/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@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> -# 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 Getopt::Long qw(:config no_auto_abbrev no_ignore_case); 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 $all=0; +my $quick=0; +my $errsyms=0; 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 + -a --all : Probe all modules (default/only thing supported) + -e --errsyms : Report any symbols not supplied by modules/kernel +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, + "all|a" => \$all, + # unsupported options + "quick|A" => \$quick, + # ignored options (for historical usage) + "quiet|q", + "root|r", + "unresolved-error|u" ); -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; +die "sorry, -A/--quick is not supported" if $quick; +die "--errsyms requires --kernelsyms" if $errsyms && !$kernelsyms; +# Strip any trailing or multiple slashes from basedir +$basedir =~ s-/+$--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/) { - $tgtname = "vmlinux"; - } else { - ($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 dependencies for each module +# reduce dependencies: 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( $exp->{$_} ) { + 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"; } - } + } +} + +# build a complete dependency list for each module and make sure it +# is kept in order proper order +my $mod2 = {}; +sub maybe_unshift +{ + my ($array, $ele) = @_; + # chop off the leading path /lib/modules/<kver>/ as modprobe + # will handle relative paths just fine + $ele =~ s:^/lib/modules/[^/]*/::; + foreach (@{$array}) { + if ($_ eq $ele) { + return; + } + } + unshift (@{$array}, $ele); } +sub add_mod_deps +{ + my ($depth, $mod, $mod2, $module, $this_module) = @_; + + $depth .= " "; + warn "${depth}loading deps of module: $this_module\n" if $verbose; -# resolve the dependancies for each module -if ($stdout == 1) { - foreach $module ( keys %$mod ) { - print "$module:\t"; - @sorted = sort bydep keys %{$mod->{$module}}; - print join(" \\\n\t",@sorted); - print "\n\n"; + foreach my $md (keys %{$mod->{$this_module}}) { + add_mod_deps ($depth, $mod, $mod2, $module, $md); + warn "${depth} outputting $md\n" if $verbose; + maybe_unshift (\@{$$mod2->{$module}}, $md); } -} else { - open(OFILE, ">$basedir/modules.dep"); - foreach $module ( keys %$mod ) { - print OFILE "$module:\t"; - @sorted = sort bydep keys %{$mod->{$module}}; - print OFILE join(" \\\n\t",@sorted); - print OFILE "\n\n"; + + if (!%{$mod->{$this_module}}) { + warn "${depth} no deps\n" if $verbose; } } +foreach my $module (keys %$mod) { + warn "filling out module: $module\n" if $verbose; + @{$mod2->{$module}} = (); + add_mod_deps ("", $mod, \$mod2, $module, $module); +} + +# figure out where the output should go +if ($stdout == 0) { + warn "writing $basedir/modules.dep\n" if $verbose; + open(STDOUT, ">$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(" ",@sorted); + print "\n\n"; + } else { + my $shortmod = $module; + $shortmod =~ s:^/lib/modules/[^/]*/::; + print "$shortmod:"; + my @sorted = @{$mod2->{$module}}; + printf " " if @sorted; + print join(" ",@sorted); + print "\n"; + } +} +sub build_ref_tables +{ + my ($name, $sym_ar, $exp, $dep) = @_; + + my $ksymtab = grep m/ ${symprefix}__ksymtab/, @$sym_ar; + + # gather the exported symbols + if($ksymtab){ + # explicitly exported + foreach ( @$sym_ar ) { + / ${symprefix}__ksymtab_(.*)$/ and do { + my $sym = ${symprefix} . $1; + warn "sym = $sym\n" if $verbose; + $exp->{$sym} = $name; + }; + } + } else { + # exporting all symbols + foreach ( @$sym_ar ) { + / [ABCDGRSTW] (.*)$/ and do { + warn "syma = $1\n" if $verbose; + $exp->{$1} = $name; + }; + } + } + + # this takes makes sure modules with no dependencies get listed + push @{$dep->{$name}}, $symprefix . 'printk' unless $name eq 'vmlinux'; + + # gather the unresolved symbols + foreach ( @$sym_ar ) { + !/ ${symprefix}__this_module/ && / U (.*)$/ and do { + warn "und = $1\n" if $verbose; + push @{$dep->{$name}}, $1; + }; + } +} + sub bydep { foreach my $f ( keys %{$mod->{$b}} ) { @@ -163,8 +270,11 @@ __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 @@ -172,12 +282,12 @@ 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 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. @@ -198,33 +308,39 @@ This displays the help message. 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@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@lineo.com> -Copyright (c) 2001 Stuart Hughes <stuarth@lineo.com> -This program is free software; you can redistribute it and/or modify it +This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. =head1 AUTHOR @@ -232,6 +348,3 @@ under the same terms as Perl itself. David Schleef <ds@schleef.org> =cut - -# $Id: depmod.pl,v 1.1.3.1 2004/12/29 07:07:44 honor Exp $ - |