https://github.com/raspberrypi/linux/blob/rpi-4.1.y/scripts/mkknlimg and use it to install a bootable uboot.bin.ubuntu/yakkety
Steve Langasek
9 years ago
parent
65f74a021d
commit
b1099d2a64
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#!/usr/bin/env perl
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# ----------------------------------------------------------------------
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# mkknlimg by Phil Elwell for Raspberry Pi
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# based on extract-ikconfig by Dick Streefland
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#
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# (c) 2009,2010 Dick Streefland <dick@streefland.net>
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# (c) 2014,2015 Raspberry Pi (Trading) Limited <info@raspberrypi.org>
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#
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# Licensed under the terms of the GNU General Public License.
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# ----------------------------------------------------------------------
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use strict;
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use warnings;
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use integer;
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my $trailer_magic = 'RPTL';
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my $tmpfile1 = "/tmp/mkknlimg_$$.1";
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my $tmpfile2 = "/tmp/mkknlimg_$$.2";
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my $dtok = 0;
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my $is_283x = 0;
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while (@ARGV && ($ARGV[0] =~ /^-/))
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{
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my $arg = shift(@ARGV);
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if ($arg eq '--dtok')
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{
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$dtok = 1;
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}
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elsif ($arg eq '--283x')
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{
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$is_283x = 1;
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}
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else
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{
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print ("* Unknown option '$arg'\n");
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usage();
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}
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}
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usage() if (@ARGV != 2);
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my $kernel_file = $ARGV[0];
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my $out_file = $ARGV[1];
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if (! -r $kernel_file)
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{
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print ("* File '$kernel_file' not found\n");
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usage();
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}
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my @wanted_strings =
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(
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'bcm2708_fb',
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'brcm,bcm2835-mmc',
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'brcm,bcm2835-sdhost',
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'brcm,bcm2708-pinctrl',
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'brcm,bcm2835-gpio',
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'brcm,bcm2835',
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'brcm,bcm2836'
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);
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my $res = try_extract($kernel_file, $tmpfile1);
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$res = try_decompress('\037\213\010', 'xy', 'gunzip', 0,
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$kernel_file, $tmpfile1, $tmpfile2) if (!$res);
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$res = try_decompress('\3757zXZ\000', 'abcde', 'unxz --single-stream', -1,
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$kernel_file, $tmpfile1, $tmpfile2) if (!$res);
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$res = try_decompress('BZh', 'xy', 'bunzip2', 0,
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$kernel_file, $tmpfile1, $tmpfile2) if (!$res);
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$res = try_decompress('\135\0\0\0', 'xxx', 'unlzma', 0,
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$kernel_file, $tmpfile1, $tmpfile2) if (!$res);
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$res = try_decompress('\211\114\132', 'xy', 'lzop -d', 0,
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$kernel_file, $tmpfile1, $tmpfile2) if (!$res);
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$res = try_decompress('\002\041\114\030', 'xy', 'lz4 -d', 1,
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$kernel_file, $tmpfile1, $tmpfile2) if (!$res);
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my $append_trailer;
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my $trailer;
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my $kver = '?';
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$append_trailer = $dtok;
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if ($res)
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{
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$kver = $res->{''} || '?';
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print("Version: $kver\n");
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$append_trailer = $dtok;
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if (!$dtok)
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{
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if (config_bool($res, 'bcm2708_fb') ||
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config_bool($res, 'brcm,bcm2835-mmc') ||
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config_bool($res, 'brcm,bcm2835-sdhost'))
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{
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$dtok ||= config_bool($res, 'brcm,bcm2708-pinctrl');
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$dtok ||= config_bool($res, 'brcm,bcm2835-gpio');
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$is_283x ||= config_bool($res, 'brcm,bcm2835');
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$is_283x ||= config_bool($res, 'brcm,bcm2836');
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$dtok ||= $is_283x;
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$append_trailer = 1;
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}
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else
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{
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print ("* This doesn't look like a Raspberry Pi kernel. In pass-through mode.\n");
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}
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}
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}
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elsif (!$dtok)
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{
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print ("* Is this a valid kernel? In pass-through mode.\n");
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}
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if ($append_trailer)
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{
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printf("DT: %s\n", $dtok ? "y" : "n");
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printf("283x: %s\n", $is_283x ? "y" : "n");
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my @atoms;
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push @atoms, [ $trailer_magic, pack('V', 0) ];
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push @atoms, [ 'KVer', $kver ];
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push @atoms, [ 'DTOK', pack('V', $dtok) ];
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push @atoms, [ '283x', pack('V', $is_283x) ];
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$trailer = pack_trailer(\@atoms);
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$atoms[0]->[1] = pack('V', length($trailer));
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$trailer = pack_trailer(\@atoms);
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}
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my $ofh;
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my $total_len = 0;
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if ($out_file eq $kernel_file)
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{
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die "* Failed to open '$out_file' for append\n"
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if (!open($ofh, '>>', $out_file));
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$total_len = tell($ofh);
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}
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else
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{
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die "* Failed to open '$kernel_file'\n"
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if (!open(my $ifh, '<', $kernel_file));
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die "* Failed to create '$out_file'\n"
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if (!open($ofh, '>', $out_file));
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my $copybuf;
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while (1)
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{
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my $bytes = sysread($ifh, $copybuf, 64*1024);
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last if (!$bytes);
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syswrite($ofh, $copybuf, $bytes);
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$total_len += $bytes;
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}
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close($ifh);
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}
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if ($trailer)
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{
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# Pad to word-alignment
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syswrite($ofh, "\x000\x000\x000", (-$total_len & 0x3));
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syswrite($ofh, $trailer);
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}
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close($ofh);
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exit($trailer ? 0 : 1);
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END {
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unlink($tmpfile1) if ($tmpfile1);
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unlink($tmpfile2) if ($tmpfile2);
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}
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sub usage
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{
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print ("Usage: mkknlimg [--dtok] [--283x] <vmlinux|zImage|bzImage> <outfile>\n");
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exit(1);
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}
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sub try_extract
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{
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my ($knl, $tmp) = @_;
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my $ver = `strings "$knl" | grep -a -E "^Linux version [1-9]"`;
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return undef if (!$ver);
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chomp($ver);
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my $res = { ''=>$ver };
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my $string_pattern = '^('.join('|', @wanted_strings).')$';
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my @matches = `strings \"$knl\" | grep -E \"$string_pattern\"`;
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foreach my $match (@matches)
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{
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chomp($match);
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$res->{$match} = 1;
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}
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return $res;
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}
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sub try_decompress
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{
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my ($magic, $subst, $zcat, $idx, $knl, $tmp1, $tmp2) = @_;
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my $pos = `tr "$magic\n$subst" "\n$subst=" < "$knl" | grep -abo "^$subst"`;
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if ($pos)
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{
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chomp($pos);
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$pos = (split(/[\r\n]+/, $pos))[$idx];
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return undef if (!defined($pos));
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$pos =~ s/:.*[\r\n]*$//s;
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my $cmd = "tail -c+$pos \"$knl\" | $zcat > $tmp2 2> /dev/null";
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my $err = (system($cmd) >> 8);
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return undef if (($err != 0) && ($err != 2));
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return try_extract($tmp2, $tmp1);
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}
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return undef;
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}
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sub pack_trailer
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{
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my ($atoms) = @_;
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my $trailer = pack('VV', 0, 0);
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for (my $i = $#$atoms; $i>=0; $i--)
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{
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my $atom = $atoms->[$i];
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$trailer .= pack('a*x!4Va4', $atom->[1], length($atom->[1]), $atom->[0]);
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}
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return $trailer;
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}
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sub config_bool
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{
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my ($configs, $wanted) = @_;
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my $val = $configs->{$wanted} || 'n';
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return (($val eq 'y') || ($val eq '1'));
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}
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