프로젝트를 하다 라즈베리파이 wheezy version중에 3.18.11을 써야 될 일이 생겼다.
두 개를 받을 수 있는데 rebase의 경우 3.18.9, rpi-3.18.y의 경우에는 3.18.16이다.
실제로 raspbian wheezy이미지를 받으면 3.18.11이지만 해당 커널 소스를 받을 수가 없었다.
그래서 찾아본 결과 branch를 이용한 방법을 알게되었다.
라즈베리파이의 sd카드를 리눅스 hostpc에 연결한 후 하는 것이 가장 좋다.
-> hash값 뜨면서 -b 새로운 브런치 어쩌구 나온다.
접기
#!/usr/bin/env perl
# ----------------------------------------------------------------------
# mkknlimg by Phil Elwell for Raspberry Pi
# based on extract-ikconfig Dick Streefland
#
# (c) 2009,2010 Dick Streefland <dick@streefland.net>
# (c) 2014,2015 Raspberry Pi (Trading) Limited <info@raspberrypi.org>
#
# Licensed under the terms of the GNU General Public License.
# ----------------------------------------------------------------------
use strict;
use warnings;
use integer;
my $trailer_magic = 'RPTL';
my $tmpfile1 = "/tmp/mkknlimg_$$.1";
my $tmpfile2 = "/tmp/mkknlimg_$$.2";
my $dtok = 0;
while (@ARGV && ($ARGV[0] =~ /^-/))
{
my $arg = shift(@ARGV);
if ($arg eq '--dtok')
{
$dtok = 1;
}
else
{
print ("* Unknown option '$arg'\n");
usage();
}
}
usage() if (@ARGV != 2);
my $kernel_file = $ARGV[0];
my $out_file = $ARGV[1];
if (! -r $kernel_file)
{
print ("* File '$kernel_file' not found\n");
usage();
}
my @wanted_config_lines =
(
'CONFIG_BCM2708_DT'
);
my @wanted_strings =
(
'bcm2708_fb',
'brcm,bcm2708-pinctrl',
'brcm,bcm2835-gpio',
'of_find_property'
);
my $res = try_extract($kernel_file, $tmpfile1);
$res = try_decompress('\037\213\010', 'xy', 'gunzip', 0,
$kernel_file, $tmpfile1, $tmpfile2) if (!$res);
$res = try_decompress('\3757zXZ\000', 'abcde', 'unxz --single-stream', -1,
$kernel_file, $tmpfile1, $tmpfile2) if (!$res);
$res = try_decompress('BZh', 'xy', 'bunzip2', 0,
$kernel_file, $tmpfile1, $tmpfile2) if (!$res);
$res = try_decompress('\135\0\0\0', 'xxx', 'unlzma', 0,
$kernel_file, $tmpfile1, $tmpfile2) if (!$res);
$res = try_decompress('\211\114\132', 'xy', 'lzop -d', 0,
$kernel_file, $tmpfile1, $tmpfile2) if (!$res);
$res = try_decompress('\002\041\114\030', 'xy', 'lz4 -d', 1,
$kernel_file, $tmpfile1, $tmpfile2) if (!$res);
my $append_trailer;
my $trailer;
my $kver = '?';
$append_trailer = $dtok;
if ($res)
{
$kver = $res->{''} || '?';
print("Version: $kver\n");
$append_trailer = $dtok;
if (!$dtok)
{
if (config_bool($res, 'bcm2708_fb'))
{
$dtok ||= config_bool($res, 'CONFIG_BCM2708_DT');
$dtok ||= config_bool($res, 'brcm,bcm2708-pinctrl');
$dtok ||= config_bool($res, 'brcm,bcm2835-gpio');
$append_trailer = 1;
}
else
{
print ("* This doesn't look like a Raspberry Pi kernel. In pass-through mode.\n");
}
}
}
elsif (!$dtok)
{
print ("* Is this a valid kernel? In pass-through mode.\n");
}
if ($append_trailer)
{
printf("DT: %s\n", $dtok ? "y" : "n");
my @atoms;
push @atoms, [ $trailer_magic, pack('V', 0) ];
push @atoms, [ 'KVer', $kver ];
push @atoms, [ 'DTOK', pack('V', $dtok) ];
$trailer = pack_trailer(\@atoms);
$atoms[0]->[1] = pack('V', length($trailer));
$trailer = pack_trailer(\@atoms);
}
my $ofh;
my $total_len = 0;
if ($out_file eq $kernel_file)
{
die "* Failed to open '$out_file' for append\n"
if (!open($ofh, '>>', $out_file));
$total_len = tell($ofh);
}
else
{
die "* Failed to open '$kernel_file'\n"
if (!open(my $ifh, '<', $kernel_file));
die "* Failed to create '$out_file'\n"
if (!open($ofh, '>', $out_file));
my $copybuf;
while (1)
{
my $bytes = sysread($ifh, $copybuf, 64*1024);
last if (!$bytes);
syswrite($ofh, $copybuf, $bytes);
$total_len += $bytes;
}
close($ifh);
}
if ($trailer)
{
# Pad to word-alignment
syswrite($ofh, "\x000\x000\x000", (-$total_len & 0x3));
syswrite($ofh, $trailer);
}
close($ofh);
exit($trailer ? 0 : 1);
END {
unlink($tmpfile1) if ($tmpfile1);
unlink($tmpfile2) if ($tmpfile2);
}
sub usage
{
print ("Usage: mkknlimg [--dtok] <vmlinux|zImage|bzImage> <outfile>\n");
exit(1);
}
sub try_extract
{
my ($knl, $tmp) = @_;
my $ver = `strings "$knl" | grep -a -E "^Linux version [1-9]"`;
return undef if (!$ver);
chomp($ver);
my $res = { ''=>$ver };
my $string_pattern = '^('.join('|', @wanted_strings).')$';
my @matches = `strings \"$knl\" | grep -E \"$string_pattern\"`;
foreach my $match (@matches)
{
chomp($match);
$res->{$match} = 1;
}
my $config_pattern = '^('.join('|', @wanted_config_lines).')=(.*)$';
my $cf1 = 'IKCFG_ST\037\213\010';
my $cf2 = '0123456789';
my $pos = `tr "$cf1\n$cf2" "\n$cf2=" < "$knl" | grep -abo "^$cf2"`;
if ($pos)
{
$pos =~ s/:.*[\r\n]*$//s;
$pos += 8;
my $err = (system("tail -c+$pos \"$knl\" | zcat > $tmp 2> /dev/null") >> 8);
if (($err == 0) || ($err == 2))
{
if (open(my $fh, '<', $tmp))
{
while (my $line = <$fh>)
{
chomp($line);
$res->{$1} = $2 if ($line =~ /$config_pattern/);
}
close($fh);
}
}
}
return $res;
}
sub try_decompress
{
my ($magic, $subst, $zcat, $idx, $knl, $tmp1, $tmp2) = @_;
my $pos = `tr "$magic\n$subst" "\n$subst=" < "$knl" | grep -abo "^$subst"`;
if ($pos)
{
chomp($pos);
$pos = (split(/[\r\n]+/, $pos))[$idx];
return undef if (!defined($pos));
$pos =~ s/:.*[\r\n]*$//s;
my $cmd = "tail -c+$pos \"$knl\" | $zcat > $tmp2 2> /dev/null";
my $err = (system($cmd) >> 8);
return undef if (($err != 0) && ($err != 2));
return try_extract($tmp2, $tmp1);
}
return undef;
}
sub pack_trailer
{
my ($atoms) = @_;
my $trailer = pack('VV', 0, 0);
for (my $i = $#$atoms; $i>=0; $i--)
{
my $atom = $atoms->[$i];
$trailer .= pack('a*x!4Va4', $atom->[1], length($atom->[1]), $atom->[0]);
}
return $trailer;
}
sub config_bool
{
my ($configs, $wanted) = @_;
my $val = $configs->{$wanted} || 'n';
return (($val eq 'y') || ($val eq '1'));
}
접기 3.18.11-v7로 바뀐 것을 확인할 수가 있다.
