--- /dev/null
+#!/usr/bin/env perl
+# ----------------------------------------------------------------------
+# knlinfo by Phil Elwell for Raspberry Pi
+#
+# (c) 2014,2015 Raspberry Pi (Trading) Limited <info@raspberrypi.org>
+#
+# Licensed under the terms of the GNU General Public License.
+# ----------------------------------------------------------------------
+
+use strict;
+use integer;
+
+use Fcntl ":seek";
+
+my $trailer_magic = 'RPTL';
+
+my %atom_formats =
+(
+ 'DDTK' => \&format_bool,
+ 'DTOK' => \&format_bool,
+ 'KVer' => \&format_string,
+ '270X' => \&format_bool,
+ '283X' => \&format_bool,
+ '283x' => \&format_bool,
+);
+
+if (@ARGV != 1)
+{
+ print ("Usage: knlinfo <kernel image>\n");
+ exit(1);
+}
+
+my $kernel_file = $ARGV[0];
+
+
+my ($atoms, $pos) = read_trailer($kernel_file);
+
+exit(1) if (!$atoms);
+
+printf("Kernel trailer found at %d/0x%x:\n", $pos, $pos);
+
+foreach my $atom (@$atoms)
+{
+ printf(" %s: %s\n", $atom->[0], format_atom($atom));
+}
+
+exit(0);
+
+sub read_trailer
+{
+ my ($kernel_file) = @_;
+ my $fh;
+
+ if (!open($fh, '<', $kernel_file))
+ {
+ print ("* Failed to open '$kernel_file'\n");
+ return undef;
+ }
+
+ if (!seek($fh, -12, SEEK_END))
+ {
+ print ("* seek error in '$kernel_file'\n");
+ return undef;
+ }
+
+ my $last_bytes;
+ sysread($fh, $last_bytes, 12);
+
+ my ($trailer_len, $data_len, $magic) = unpack('VVa4', $last_bytes);
+
+ if (($magic ne $trailer_magic) || ($data_len != 4))
+ {
+ print ("* no trailer\n");
+ return undef;
+ }
+ if (!seek($fh, -12, SEEK_END))
+ {
+ print ("* seek error in '$kernel_file'\n");
+ return undef;
+ }
+
+ $trailer_len -= 12;
+
+ while ($trailer_len > 0)
+ {
+ if ($trailer_len < 8)
+ {
+ print ("* truncated atom header in trailer\n");
+ return undef;
+ }
+ if (!seek($fh, -8, SEEK_CUR))
+ {
+ print ("* seek error in '$kernel_file'\n");
+ return undef;
+ }
+ $trailer_len -= 8;
+
+ my $atom_hdr;
+ sysread($fh, $atom_hdr, 8);
+ my ($atom_len, $atom_type) = unpack('Va4', $atom_hdr);
+
+ if ($trailer_len < $atom_len)
+ {
+ print ("* truncated atom data in trailer\n");
+ return undef;
+ }
+
+ my $rounded_len = (($atom_len + 3) & ~3);
+ if (!seek($fh, -(8 + $rounded_len), SEEK_CUR))
+ {
+ print ("* seek error in '$kernel_file'\n");
+ return undef;
+ }
+ $trailer_len -= $rounded_len;
+
+ my $atom_data;
+ sysread($fh, $atom_data, $atom_len);
+
+ if (!seek($fh, -$atom_len, SEEK_CUR))
+ {
+ print ("* seek error in '$kernel_file'\n");
+ return undef;
+ }
+
+ push @$atoms, [ $atom_type, $atom_data ];
+ }
+
+ if (($$atoms[-1][0] eq "\x00\x00\x00\x00") &&
+ ($$atoms[-1][1] eq ""))
+ {
+ pop @$atoms;
+ }
+ else
+ {
+ print ("* end marker missing from trailer\n");
+ }
+
+ return ($atoms, tell($fh));
+}
+
+sub format_atom
+{
+ my ($atom) = @_;
+
+ my $format_func = $atom_formats{$atom->[0]} || \&format_hex;
+ return $format_func->($atom->[1]);
+}
+
+sub format_bool
+{
+ my ($data) = @_;
+ return unpack('V', $data) ? 'y' : 'n';
+}
+
+sub format_int
+{
+ my ($data) = @_;
+ return unpack('V', $data);
+}
+
+sub format_string
+{
+ my ($data) = @_;
+ return '"'.$data.'"';
+}
+
+sub format_hex
+{
+ my ($data) = @_;
+ return unpack('H*', $data);
+}
--- /dev/null
+#!/usr/bin/env perl
+# ----------------------------------------------------------------------
+# mkknlimg by Phil Elwell for Raspberry Pi
+# based on extract-ikconfig by 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;
+
+use constant FLAG_PI => 0x01;
+use constant FLAG_DTOK => 0x02;
+use constant FLAG_DDTK => 0x04;
+use constant FLAG_270X => 0x08;
+use constant FLAG_283X => 0x10;
+
+my $trailer_magic = 'RPTL';
+
+my $tmpfile1 = "/tmp/mkknlimg_$$.1";
+my $tmpfile2 = "/tmp/mkknlimg_$$.2";
+
+my $dtok = 0;
+my $ddtk = 0;
+my $is_270x = 0;
+my $is_283x = 0;
+
+while (@ARGV && ($ARGV[0] =~ /^-/))
+{
+ my $arg = shift(@ARGV);
+ if ($arg eq '--dtok')
+ {
+ $dtok = 1;
+ }
+ elsif ($arg eq '--ddtk')
+ {
+ $ddtk = 1;
+ }
+ elsif ($arg eq '--270x')
+ {
+ $is_270x = 1;
+ }
+ elsif ($arg eq '--283x')
+ {
+ $is_283x = 1;
+ }
+ else
+ {
+ print ("* Unknown option '$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_strings =
+{
+ 'bcm2708_fb' => FLAG_PI | FLAG_270X,
+ 'brcm,bcm2835-mmc' => FLAG_PI,
+ 'brcm,bcm2835-sdhost' => FLAG_PI,
+ 'brcm,bcm2708-pinctrl' => FLAG_PI | FLAG_DTOK,
+ 'brcm,bcm2835-gpio' => FLAG_PI | FLAG_DTOK,
+ 'brcm,bcm2708' => FLAG_PI | FLAG_DTOK | FLAG_270X,
+ 'brcm,bcm2709' => FLAG_PI | FLAG_DTOK | FLAG_270X,
+ 'brcm,bcm2835' => FLAG_PI | FLAG_DTOK | FLAG_283X,
+ 'brcm,bcm2836' => FLAG_PI | FLAG_DTOK | FLAG_283X,
+ 'of_cfs_init' => FLAG_DTOK | FLAG_DDTK,
+ 'vc_cma_init' => FLAG_PI | FLAG_270X,
+ 'vc-mem' => FLAG_PI | FLAG_270X,
+};
+
+my $res = try_extract($kernel_file, $tmpfile1);
+$res ||= try_decompress('\037\213\010', 'xy', 'gunzip', 0,
+ $kernel_file, $tmpfile1, $tmpfile2);
+$res ||= try_decompress('\3757zXZ\000', 'abcde', 'unxz --single-stream', -1,
+ $kernel_file, $tmpfile1, $tmpfile2);
+$res ||= try_decompress('BZh', 'xy', 'bunzip2', 0,
+ $kernel_file, $tmpfile1, $tmpfile2);
+$res ||= try_decompress('\135\0\0\0', 'xxx', 'unlzma', 0,
+ $kernel_file, $tmpfile1, $tmpfile2);
+$res ||= try_decompress('\211\114\132', 'xy', 'lzop -d', 0,
+ $kernel_file, $tmpfile1, $tmpfile2);
+$res ||= try_decompress('\002\041\114\030', 'xy', 'lz4 -d', 1,
+ $kernel_file, $tmpfile1, $tmpfile2);
+
+my $append_trailer;
+my $trailer;
+my $kver = '?';
+
+$append_trailer = 1;
+
+if ($res)
+{
+ $kver = $res->{'kver'} || '?';
+ my $flags = $res->{'flags'};
+ print("Version: $kver\n");
+
+ if ($flags & FLAG_PI)
+ {
+ $dtok ||= ($flags & FLAG_DTOK) != 0;
+ $is_270x ||= ($flags & FLAG_270X) != 0;
+ $is_283x ||= ($flags & FLAG_283X) != 0;
+ $ddtk ||= ($flags & FLAG_DDTK) != 0;
+ }
+ else
+ {
+ print ("* This doesn't look like a Raspberry Pi kernel.\n");
+ }
+}
+elsif (!$dtok)
+{
+ print ("* Is this a valid kernel?\n");
+}
+
+if ($append_trailer)
+{
+ printf("DT: %s\n", $dtok ? "y" : "n");
+ printf("DDT: %s\n", $ddtk ? "y" : "n");
+ printf("270x: %s\n", $is_270x ? "y" : "n");
+ printf("283x: %s\n", $is_283x ? "y" : "n");
+
+ my @atoms;
+
+ push @atoms, [ $trailer_magic, pack('V', 0) ];
+ push @atoms, [ 'KVer', $kver ];
+ push @atoms, [ 'DTOK', pack('V', $dtok) ];
+ push @atoms, [ 'DDTK', pack('V', $ddtk) ];
+ push @atoms, [ '270X', pack('V', $is_270x) ];
+ push @atoms, [ '283X', pack('V', $is_283x) ];
+ push @atoms, [ '283x', pack('V', $is_283x && !$is_270x) ];
+
+ $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 ($tmpfile2);
+}
+
+
+sub usage
+{
+ print ("Usage: mkknlimg [--dtok] [--270x] [--283x] <vmlinux|zImage|bzImage> <outfile>\n");
+ exit(1);
+}
+
+sub try_extract
+{
+ my ($knl, $tmp) = @_;
+
+ my $ver = `strings "$knl" | grep -a -E "^Linux version [1-9]"`;
+
+ return undef if (!$ver);
+
+ chomp($ver);
+
+ my $res = { 'kver'=>$ver };
+ $res->{'flags'} = strings_to_flags($knl, $wanted_strings);
+
+ 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, $tmp1);
+ }
+
+ return undef;
+}
+
+sub strings_to_flags
+{
+ my ($knl, $strings) = @_;
+ my $string_pattern = '^('.join('|', keys(%$strings)).')$';
+ my $flags = 0;
+
+ my @matches = `strings \"$knl\" | grep -E \"$string_pattern\"`;
+ foreach my $match (@matches)
+ {
+ chomp($match);
+ $flags |= $strings->{$match};
+ }
+
+ return $flags;
+}
+
+sub pack_trailer
+{
+ my ($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;
+}