Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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# installdir: dir to install the files to
8# 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
12#
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;
19
20my ($installdir, $arch, @files) = @ARGV;
21
22my $unifdef = "scripts/unifdef -U__KERNEL__ -D__EXPORTED_HEADERS__";
23
24foreach my $filename (@files) {
25 my $file = $filename;
26 $file =~ s!^.*/!!;
27
28 my $tmpfile = "$installdir/$file.tmp";
29
30 open(my $in, '<', $filename)
31 or die "$filename: $!\n";
32 open(my $out, '>', $tmpfile)
33 or die "$tmpfile: $!\n";
34 while (my $line = <$in>) {
35 $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;
40 $line =~ s/\b__packed\b/__attribute__((packed))/g;
41 $line =~ s/^#include <linux\/compiler.h>//;
42 $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__$3/g;
45 printf {$out} "%s", $line;
46 }
47 close $out;
48 close $in;
49
50 system $unifdef . " $tmpfile > $installdir/$file";
51 # unifdef will exit 0 on success, and will exit 1 when the
52 # file was processed successfully but no changes were made,
53 # so abort only when it's higher than that.
54 my $e = $? >> 8;
55 if ($e > 1) {
56 die "$tmpfile: $!\n";
57 }
58 unlink $tmpfile;
59}
60exit 0;