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Jeremy Huntwork15a2ee72008-10-29 14:20:13 -07001#!/usr/bin/perl -w
Sam Ravnborg77124012008-06-15 21:41:09 +02002#
3# headers_install prepare the listed header files for use in
4# user space and copy the files to their destination.
5#
Sam Ravnborgdb1bec42008-06-16 21:29:38 +02006# Usage: headers_install.pl readdir installdir arch [files...]
David Howells10b63952012-10-02 18:01:57 +01007# installdir: dir to install the files to
Sam Ravnborgdb1bec42008-06-16 21:29:38 +02008# arch: current architecture
9# arch is used to force a reinstallation when the arch
10# changes because kbuild then detect a command line change.
11# files: list of files to check
Sam Ravnborg77124012008-06-15 21:41:09 +020012#
13# Step in preparation for users space:
14# 1) Drop all use of compiler.h definitions
15# 2) Drop include of compiler.h
16# 3) Drop all sections defined out by __KERNEL__ (using unifdef)
17
18use strict;
Sam Ravnborg77124012008-06-15 21:41:09 +020019
David Howells10b63952012-10-02 18:01:57 +010020my ($installdir, $arch, @files) = @ARGV;
Sam Ravnborg77124012008-06-15 21:41:09 +020021
Arnd Bergmannc01226c2009-09-21 16:37:12 +020022my $unifdef = "scripts/unifdef -U__KERNEL__ -D__EXPORTED_HEADERS__";
Sam Ravnborg77124012008-06-15 21:41:09 +020023
David Howells10b63952012-10-02 18:01:57 +010024foreach my $filename (@files) {
25 my $file = $filename;
26 $file =~ s!^.*/!!;
27
Sam Ravnborg77124012008-06-15 21:41:09 +020028 my $tmpfile = "$installdir/$file.tmp";
Stephen Hemmingerbae4cec2010-02-22 15:17:26 -080029
David Howells10b63952012-10-02 18:01:57 +010030 open(my $in, '<', $filename)
31 or die "$filename: $!\n";
Stephen Hemmingerbae4cec2010-02-22 15:17:26 -080032 open(my $out, '>', $tmpfile)
33 or die "$tmpfile: $!\n";
34 while (my $line = <$in>) {
Sam Ravnborg77124012008-06-15 21:41:09 +020035 $line =~ s/([\s(])__user\s/$1/g;
36 $line =~ s/([\s(])__force\s/$1/g;
37 $line =~ s/([\s(])__iomem\s/$1/g;
38 $line =~ s/\s__attribute_const__\s/ /g;
39 $line =~ s/\s__attribute_const__$//g;
Markus Trippelsdorff2107352011-06-24 15:51:00 +020040 $line =~ s/\b__packed\b/__attribute__((packed))/g;
Sam Ravnborg77124012008-06-15 21:41:09 +020041 $line =~ s/^#include <linux\/compiler.h>//;
Mike Frysinger43071842008-12-27 03:23:15 -050042 $line =~ s/(^|\s)(inline)\b/$1__$2__/g;
43 $line =~ s/(^|\s)(asm)\b(\s|[(]|$)/$1__$2__$3/g;
44 $line =~ s/(^|\s|[(])(volatile)\b(\s|[(]|$)/$1__$2__$3/g;
David Howells56c176c2012-11-26 16:29:39 -080045 $line =~ s/#ifndef _UAPI/#ifndef /;
46 $line =~ s/#define _UAPI/#define /;
47 $line =~ s!#endif /[*] _UAPI!#endif /* !;
Stephen Hemmingerbae4cec2010-02-22 15:17:26 -080048 printf {$out} "%s", $line;
Sam Ravnborg77124012008-06-15 21:41:09 +020049 }
Stephen Hemmingerbae4cec2010-02-22 15:17:26 -080050 close $out;
51 close $in;
52
Sam Ravnborg77124012008-06-15 21:41:09 +020053 system $unifdef . " $tmpfile > $installdir/$file";
Mike Frysinger29790762010-11-23 19:54:02 -050054 # unifdef will exit 0 on success, and will exit 1 when the
55 # file was processed successfully but no changes were made,
56 # so abort only when it's higher than that.
57 my $e = $? >> 8;
58 if ($e > 1) {
59 die "$tmpfile: $!\n";
60 }
Sam Ravnborg77124012008-06-15 21:41:09 +020061 unlink $tmpfile;
62}
63exit 0;