--- /dev/null
+From 91e833ab0b220bb0bb810bb9605b0a03cd76baa8 Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.org>
+Date: Mon, 11 May 2015 09:00:42 +0100
+Subject: [PATCH 049/232] scripts: Add mkknlimg and knlinfo scripts from tools
+ repo
+
+The Raspberry Pi firmware looks for a trailer on the kernel image to
+determine whether it was compiled with Device Tree support enabled.
+If the firmware finds a kernel without this trailer, or which has a
+trailer indicating that it isn't DT-capable, it disables DT support
+and reverts to using ATAGs.
+
+The mkknlimg utility adds that trailer, having first analysed the
+image to look for signs of DT support and the kernel version string.
+
+knlinfo displays the contents of the trailer in the given kernel image.
+
+scripts/mkknlimg: Add support for ARCH_BCM2835
+
+Add a new trailer field indicating whether this is an ARCH_BCM2835
+build, as opposed to MACH_BCM2708/9. If the loader finds this flag
+is set it changes the default base dtb file name from bcm270x...
+to bcm283y...
+
+Also update knlinfo to show the status of the field.
+
+scripts/mkknlimg: Improve ARCH_BCM2835 detection
+
+The board support code contains sufficient strings to be able to
+distinguish 2708 vs. 2835 builds, so remove the check for
+bcm2835-pm-wdt which could exist in either.
+
+Also, since the canned configuration is no longer built in (it's
+a module), remove the config string checking.
+
+See: https://github.com/raspberrypi/linux/issues/1157
+---
+ scripts/knlinfo | 168 ++++++++++++++++++++++++++++++++++++++
+ scripts/mkknlimg | 244 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
+ 2 files changed, 412 insertions(+)
+ create mode 100755 scripts/knlinfo
+ create mode 100755 scripts/mkknlimg
+
+--- /dev/null
++++ b/scripts/knlinfo
+@@ -0,0 +1,168 @@
++#!/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 =
++(
++ 'DTOK' => \&format_bool,
++ 'KVer' => \&format_string,
++ '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', $data) ? 'true' : 'false';
++}
++
++sub format_int
++{
++ my ($data) = @_;
++ return unpack('V', $data);
++}
++
++sub format_string
++{
++ my ($data) = @_;
++ return '"'.$data.'"';
++}
++
++sub format_hex
++{
++ my ($data) = @_;
++ return unpack('H*', $data);
++}
+--- /dev/null
++++ b/scripts/mkknlimg
+@@ -0,0 +1,244 @@
++#!/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;
++
++my $trailer_magic = 'RPTL';
++
++my $tmpfile1 = "/tmp/mkknlimg_$$.1";
++my $tmpfile2 = "/tmp/mkknlimg_$$.2";
++
++my $dtok = 0;
++my $is_283x = 0;
++
++while (@ARGV && ($ARGV[0] =~ /^-/))
++{
++ my $arg = shift(@ARGV);
++ if ($arg eq '--dtok')
++ {
++ $dtok = 1;
++ }
++ elsif ($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',
++ 'brcm,bcm2835-mmc',
++ 'brcm,bcm2835-sdhost',
++ 'brcm,bcm2708-pinctrl',
++ 'brcm,bcm2835-gpio',
++ 'brcm,bcm2835',
++ 'brcm,bcm2836'
++);
++
++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($res, 'bcm2708_fb') ||
++ config_bool($res, 'brcm,bcm2835-mmc') ||
++ config_bool($res, 'brcm,bcm2835-sdhost'))
++ {
++ $dtok ||= config_bool($res, 'brcm,bcm2708-pinctrl');
++ $dtok ||= config_bool($res, 'brcm,bcm2835-gpio');
++ $is_283x ||= config_bool($res, 'brcm,bcm2835');
++ $is_283x ||= config_bool($res, 'brcm,bcm2836');
++ $dtok ||= $is_283x;
++ $append_trailer = 1;
++ }
++ else
++ {
++ print ("* This doesn't look like a Raspberry Pi kernel. In pass-through mode.\n");
++ }
++ }
++}
++elsif (!$dtok)
++{
++ print ("* Is this a valid kernel? In pass-through mode.\n");
++}
++
++if ($append_trailer)
++{
++ printf("DT: %s\n", $dtok ? "y" : "n");
++ 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, [ '283x', pack('V', $is_283x) ];
++
++ $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 ($tmpfile2);
++}
++
++
++sub usage
++{
++ print ("Usage: mkknlimg [--dtok] [--283x] <vmlinux|zImage|bzImage> <outfile>\n");
++ exit(1);
++}
++
++sub try_extract
++{
++ my ($knl, $tmp) = @_;
++
++ my $ver = `strings "$knl" | grep -a -E "^Linux version [1-9]"`;
++
++ return undef if (!$ver);
++
++ chomp($ver);
++
++ my $res = { ''=>$ver };
++ my $string_pattern = '^('.join('|', @wanted_strings).')$';
++
++ my @matches = `strings \"$knl\" | grep -E \"$string_pattern\"`;
++ foreach my $match (@matches)
++ {
++ chomp($match);
++ $res->{$match} = 1;
++ }
++
++ 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'));
++}
projects / openwrt / openwrt.git / blobdiff