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Diffstat (limited to 'busybox/examples/depmod.pl')
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diff --git a/busybox/examples/depmod.pl b/busybox/examples/depmod.pl new file mode 100755 index 000000000..9af192208 --- /dev/null +++ b/busybox/examples/depmod.pl | |||
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1 | #!/usr/bin/perl -w | ||
2 | # vi: set ts=4: | ||
3 | # Copyright (c) 2001 David Schleef <ds@schleef.org> | ||
4 | # Copyright (c) 2001 Erik Andersen <andersen@codepoet.org> | ||
5 | # Copyright (c) 2001 Stuart Hughes <stuarth@lineo.com> | ||
6 | # Copyright (c) 2002 Steven J. Hill <shill@broadcom.com> | ||
7 | # This program is free software; you can redistribute it and/or modify it | ||
8 | # under the same terms as Perl itself. | ||
9 | |||
10 | # TODO -- use strict mode... | ||
11 | #use strict; | ||
12 | |||
13 | use Getopt::Long; | ||
14 | use File::Find; | ||
15 | |||
16 | |||
17 | # Set up some default values | ||
18 | |||
19 | my $basedir=""; | ||
20 | my $kernel; | ||
21 | my $kernelsyms; | ||
22 | my $stdout=0; | ||
23 | my $verbose=0; | ||
24 | |||
25 | |||
26 | # get command-line options | ||
27 | |||
28 | my %opt; | ||
29 | |||
30 | GetOptions( | ||
31 | \%opt, | ||
32 | "help|h", | ||
33 | "basedir|b=s" => \$basedir, | ||
34 | "kernel|k=s" => \$kernel, | ||
35 | "kernelsyms|F=s" => \$kernelsyms, | ||
36 | "stdout|n" => \$stdout, | ||
37 | "verbose|v" => \$verbose, | ||
38 | ); | ||
39 | |||
40 | if (defined $opt{help}) { | ||
41 | |||
42 | " $0 [OPTION]... [basedir]\n", | ||
43 | " -h --help\t\tShow this help screen\n", | ||
44 | " -b --basedir\tModules base directory (defaults to /lib/modules)\n", | ||
45 | " -k --kernel\tKernel binary for the target\n", | ||
46 | " -F --kernelsyms\tKernel symbol file\n", | ||
47 | " -n --stdout\tWrite to stdout instead of <basedir>/modules.dep\n", | ||
48 | " -v --verbose\tPrint out lots of debugging stuff\n", | ||
49 | ; | ||
50 | exit 1; | ||
51 | } | ||
52 | |||
53 | if($basedir !~ m-/lib/modules-) { | ||
54 | warn "WARNING: base directory does not match ..../lib/modules\n"; | ||
55 | } | ||
56 | |||
57 | # Find the list of .o files living under $basedir | ||
58 | #if ($verbose) { printf "Locating all modules\n"; } | ||
59 | my($ofile) = ""; | ||
60 | my($file) = ""; | ||
61 | my(@liblist) = (); | ||
62 | find sub { | ||
63 | if ( -f $_ && ! -d $_ ) { | ||
64 | $file = $File::Find::name; | ||
65 | if ( $file =~ /.o$/ ) { | ||
66 | push(@liblist, $file); | ||
67 | if ($verbose) { printf "$file\n"; } | ||
68 | } | ||
69 | } | ||
70 | }, $basedir; | ||
71 | if ($verbose) { printf "Finished locating modules\n"; } | ||
72 | |||
73 | foreach $obj ( @liblist, $kernel ){ | ||
74 | # turn the input file name into a target tag name | ||
75 | # vmlinux is a special that is only used to resolve symbols | ||
76 | if($obj =~ /vmlinux/) { | ||
77 | $tgtname = "vmlinux"; | ||
78 | } else { | ||
79 | ($tgtname) = $obj =~ m-(/lib/modules/.*)$-; | ||
80 | } | ||
81 | |||
82 | warn "MODULE = $tgtname\n" if $verbose; | ||
83 | |||
84 | # get a list of symbols | ||
85 | @output=`nm $obj`; | ||
86 | $ksymtab=grep m/ __ksymtab/, @output; | ||
87 | |||
88 | # gather the exported symbols | ||
89 | if($ksymtab){ | ||
90 | # explicitly exported | ||
91 | foreach ( @output ) { | ||
92 | / __ksymtab_(.*)$/ and do { | ||
93 | warn "sym = $1\n" if $verbose; | ||
94 | $exp->{$1} = $tgtname; | ||
95 | }; | ||
96 | } | ||
97 | } else { | ||
98 | # exporting all symbols | ||
99 | foreach ( @output) { | ||
100 | / [ABCDGRST] (.*)$/ and do { | ||
101 | warn "syma = $1\n" if $verbose; | ||
102 | $exp->{$1} = $tgtname; | ||
103 | }; | ||
104 | } | ||
105 | } | ||
106 | # gather the unresolved symbols | ||
107 | foreach ( @output ) { | ||
108 | !/ __this_module/ && / U (.*)$/ and do { | ||
109 | warn "und = $1\n" if $verbose; | ||
110 | push @{$dep->{$tgtname}}, $1; | ||
111 | }; | ||
112 | } | ||
113 | } | ||
114 | |||
115 | |||
116 | # reduce dependancies: remove unresolvable and resolved from vmlinux | ||
117 | # remove duplicates | ||
118 | foreach $module (keys %$dep) { | ||
119 | $mod->{$module} = {}; | ||
120 | foreach (@{$dep->{$module}}) { | ||
121 | if( $exp->{$_} ) { | ||
122 | warn "resolved symbol $_ in file $exp->{$_}\n" if $verbose; | ||
123 | next if $exp->{$_} =~ /vmlinux/; | ||
124 | $mod->{$module}{$exp->{$_}} = 1; | ||
125 | } else { | ||
126 | warn "unresolved symbol $_ in file $module\n"; | ||
127 | } | ||
128 | } | ||
129 | } | ||
130 | |||
131 | # resolve the dependancies for each module | ||
132 | if ($stdout == 1) { | ||
133 | foreach $module ( keys %$mod ) { | ||
134 | print "$module:\t"; | ||
135 | @sorted = sort bydep keys %{$mod->{$module}}; | ||
136 | print join(" \\\n\t",@sorted); | ||
137 | print "\n\n"; | ||
138 | } | ||
139 | } else { | ||
140 | open(OFILE, ">$basedir/modules.dep"); | ||
141 | foreach $module ( keys %$mod ) { | ||
142 | print OFILE "$module:\t"; | ||
143 | @sorted = sort bydep keys %{$mod->{$module}}; | ||
144 | print OFILE join(" \\\n\t",@sorted); | ||
145 | print OFILE "\n\n"; | ||
146 | } | ||
147 | } | ||
148 | |||
149 | |||
150 | sub bydep | ||
151 | { | ||
152 | foreach my $f ( keys %{$mod->{$b}} ) { | ||
153 | if($f eq $a) { | ||
154 | return 1; | ||
155 | } | ||
156 | } | ||
157 | return -1; | ||
158 | } | ||
159 | |||
160 | |||
161 | |||
162 | __END__ | ||
163 | |||
164 | =head1 NAME | ||
165 | |||
166 | depmod.pl - a cross platform script to generate kernel module dependency | ||
167 | lists which can then be used by modprobe. | ||
168 | |||
169 | =head1 SYNOPSIS | ||
170 | |||
171 | depmod.pl [OPTION]... [basedir]... | ||
172 | |||
173 | Example: | ||
174 | |||
175 | depmod.pl -F linux/System.map target/lib/modules | ||
176 | |||
177 | =head1 DESCRIPTION | ||
178 | |||
179 | The purpose of this script is to automagically generate a list of of kernel | ||
180 | module dependancies. This script produces dependancy lists that should be | ||
181 | identical to the depmod program from the modutils package. Unlike the depmod | ||
182 | binary, however, depmod.pl is designed to be run on your host system, not | ||
183 | on your target system. | ||
184 | |||
185 | This script was written by David Schleef <ds@schleef.org> to be used in | ||
186 | conjunction with the BusyBox modprobe applet. | ||
187 | |||
188 | =head1 OPTIONS | ||
189 | |||
190 | =over 4 | ||
191 | |||
192 | =item B<-h --help> | ||
193 | |||
194 | This displays the help message. | ||
195 | |||
196 | =item B<-b --basedir> | ||
197 | |||
198 | The base directory uner which the target's modules will be found. This | ||
199 | defaults to the /lib/modules directory. | ||
200 | |||
201 | =item B<-k --kernel> | ||
202 | |||
203 | Kernel binary for the target. You must either supply a kernel binary | ||
204 | or a kernel symbol file (using the -F option). | ||
205 | |||
206 | =item B<-F --kernelsyms> | ||
207 | |||
208 | Kernel symbol file for the target. You must supply either a kernel symbol file | ||
209 | kernel binary for the target (using the -k option). | ||
210 | |||
211 | =item B<-n --stdout> | ||
212 | |||
213 | Write to stdout instead of modules.dep. This is currently hard coded... | ||
214 | kernel binary for the target (using the -k option). | ||
215 | |||
216 | =item B<--verbose> | ||
217 | |||
218 | Be verbose (not implemented) | ||
219 | |||
220 | =back | ||
221 | |||
222 | =head1 COPYRIGHT | ||
223 | |||
224 | Copyright (c) 2001 David Schleef <ds@schleef.org> | ||
225 | Copyright (c) 2001 Erik Andersen <andersen@codepoet.org> | ||
226 | Copyright (c) 2001 Stuart Hughes <stuarth@lineo.com> | ||
227 | This program is free software; you can redistribute it and/or modify it | ||
228 | under the same terms as Perl itself. | ||
229 | |||
230 | =head1 AUTHOR | ||
231 | |||
232 | David Schleef <ds@schleef.org> | ||
233 | |||
234 | =cut | ||
235 | |||
236 | # $Id: depmod.pl,v 1.4 2004/03/15 08:28:33 andersen Exp $ | ||
237 | |||