Root/scripts/headers_install.pl

1#!/usr/bin/perl -w
2#
3# headers_install prepare the listed header files for use in
4# user space and copy the files to their destination.
5#
6# Usage: headers_install.pl readdir installdir arch [files...]
7# readdir: dir to open files
8# installdir: dir to install the files
9# arch: current architecture
10# arch is used to force a reinstallation when the arch
11# changes because kbuild then detect a command line change.
12# files: list of files to check
13#
14# Step in preparation for users space:
15# 1) Drop all use of compiler.h definitions
16# 2) Drop include of compiler.h
17# 3) Drop all sections defined out by __KERNEL__ (using unifdef)
18
19use strict;
20
21my ($readdir, $installdir, $arch, @files) = @ARGV;
22
23my $unifdef = "scripts/unifdef -U__KERNEL__ -D__EXPORTED_HEADERS__";
24
25foreach my $file (@files) {
26    local *INFILE;
27    local *OUTFILE;
28    my $tmpfile = "$installdir/$file.tmp";
29    open(INFILE, "<$readdir/$file")
30        or die "$readdir/$file: $!\n";
31    open(OUTFILE, ">$tmpfile") or die "$tmpfile: $!\n";
32    while (my $line = <INFILE>) {
33        $line =~ s/([\s(])__user\s/$1/g;
34        $line =~ s/([\s(])__force\s/$1/g;
35        $line =~ s/([\s(])__iomem\s/$1/g;
36        $line =~ s/\s__attribute_const__\s/ /g;
37        $line =~ s/\s__attribute_const__$//g;
38        $line =~ s/^#include <linux\/compiler.h>//;
39        $line =~ s/(^|\s)(inline)\b/$1__$2__/g;
40        $line =~ s/(^|\s)(asm)\b(\s|[(]|$)/$1__$2__$3/g;
41        $line =~ s/(^|\s|[(])(volatile)\b(\s|[(]|$)/$1__$2__$3/g;
42        printf OUTFILE "%s", $line;
43    }
44    close OUTFILE;
45    close INFILE;
46    system $unifdef . " $tmpfile > $installdir/$file";
47    unlink $tmpfile;
48}
49exit 0;
50

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