[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/app/busybox/src/examples/depmod.pl b/ap/app/busybox/src/examples/depmod.pl
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+#!/usr/bin/perl -w
+# 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 <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.
+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 $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
+GetOptions(
+ "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"
+);
+
+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($basedir !~ m-/lib/modules-) {
+ warn "WARNING: base directory does not match ..../lib/modules\n";
+}
+
+# if no kernel version is contained in the basedir, try to find one
+if($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 ( $file =~ /\.k?o$/ ) {
+ push(@liblist, $file);
+ warn "$file\n" if $verbose;
+ }
+ }
+}, $basedir;
+warn "**** Finished locating modules\n" if $verbose;
+
+foreach my $obj ( @liblist ){
+ # turn the input file name into a target tag name
+ my ($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";
+ }
+ }
+}
+
+# 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 $verbose;
+ if (length($depth) > 50) {
+ die "too much recursion (circular dependencies in modules?)";
+ }
+
+ 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}}, $md);
+ }
+
+ if (!%{$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\.4\.[^/]*, ? '2.4' : 'others';
+
+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 {
+ 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->{$b}} ) {
+ if($f eq $a) {
+ return 1;
+ }
+ }
+ return -1;
+}
+
+
+
+__END__
+
+=head1 NAME
+
+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
+
+depmod.pl [OPTION]... [basedir]...
+
+Example:
+
+ 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 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.
+
+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.
+
+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 (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 (System.map).
+
+=item B<-n --stdout>
+
+Write to stdout instead of modules.dep
+kernel binary for the target (using the -k option).
+
+=item B<--verbose>
+
+Verbose (debug) output
+
+=back
+
+=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>
+
+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