+++ /dev/null
-From 28951ab97e67b20640b183364d2396e91e8a6148 Mon Sep 17 00:00:00 2001
-From: Phil Elwell <phil@raspberrypi.org>
-Date: Mon, 11 May 2015 09:00:42 +0100
-Subject: [PATCH] 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: Multi-platform support for mkknlimg and knlinfo
-
-The firmware uses tags in the kernel trailer to choose which dtb file
-to load. Current firmware loads bcm2835-*.dtb if the '283x' tag is true,
-otherwise it loads bcm270*.dtb. This scheme breaks if an image supports
-multiple platforms.
-
-This patch adds '270X' and '283X' tags to indicate support for RPi and
-upstream platforms, respectively. '283x' (note lower case 'x') is left
-for old firmware, and is only set if the image only supports upstream
-builds.
-
-scripts/mkknlimg: Append a trailer for all input
-
-Now that the firmware assumes an unsigned kernel is DT-capable, it is
-helpful to be able to mark a kernel as being non-DT-capable.
-
-Signed-off-by: Phil Elwell <phil@raspberrypi.org>
-
-scripts/knlinfo: Decode DDTK atom
-
-Show the DDTK atom as being a boolean.
-
-Signed-off-by: Phil Elwell <phil@raspberrypi.org>
-
-mkknlimg: Retain downstream-kernel detection
-
-With the death of ARCH_BCM2708 and ARCH_BCM2709, a new way is needed to
-determine if this is a "downstream" build that wants the firmware to
-load a bcm27xx .dtb. The vc_cma driver is used downstream but not
-upstream, making vc_cma_init a suitable predicate symbol.
-
-mkknlimg: Find some more downstream-only strings
-
-See: https://github.com/raspberrypi/linux/issues/1920
-
-Signed-off-by: Phil Elwell <phil@raspberrypi.org>
-
-scripts: Update mkknlimg, just in case
-
-With the removal of the vc_cma driver, mkknlimg lost an indication that
-the user had built a downstream kernel. Update the script, adding a few
-more key strings, in case it is still being used.
-
-Note that mkknlimg is now deprecated, except to tag kernels as upstream
-(283x), and thus requiring upstream DTBs.
-
-See: https://github.com/raspberrypi/linux/issues/2239
-
-Signed-off-by: Phil Elwell <phil@raspberrypi.org>
----
- scripts/knlinfo | 171 +++++++++++++++++++++++++++++++
- scripts/mkknlimg | 262 +++++++++++++++++++++++++++++++++++++++++++++++
- 2 files changed, 433 insertions(+)
- create mode 100755 scripts/knlinfo
- create mode 100755 scripts/mkknlimg
-
---- /dev/null
-+++ b/scripts/knlinfo
-@@ -0,0 +1,171 @@
-+#!/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
-+++ b/scripts/mkknlimg
-@@ -0,0 +1,262 @@
-+#!/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 =
-+{
-+ 'brcm,bcm2835-mmc' => FLAG_PI,
-+ 'brcm,bcm2835-sdhost' => FLAG_PI,
-+ 'brcm,bcm2835-gpio' => FLAG_PI | FLAG_DTOK,
-+ 'brcm,bcm2708-fb' => FLAG_PI | FLAG_DTOK | FLAG_270X,
-+ 'brcm,bcm2708-usb' => FLAG_PI | FLAG_DTOK | FLAG_270X,
-+ 'brcm,bcm2835' => FLAG_PI | FLAG_DTOK | FLAG_283X,
-+ 'brcm,bcm2836' => FLAG_PI | FLAG_DTOK | FLAG_283X,
-+ 'brcm,bcm2837' => FLAG_PI | FLAG_DTOK | FLAG_283X,
-+ 'of_cfs_init' => FLAG_DTOK | FLAG_DDTK,
-+};
-+
-+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;
-+}
projects / openwrt / openwrt.git / blobdiff