chromebook-arm-exynos.sh

#!/bin/bash

if [[ $# -eq 0 ]] ; then
    echo "Please pass version number, e.g. $0 2.0"
    exit 0
fi

basedir=`pwd`/exynos-$1

# Make sure that the cross compiler can be found in the path before we do
# anything else, that way the builds don't fail half way through.
export CROSS_COMPILE=arm-linux-gnueabihf-
if [ $(compgen -c $CROSS_COMPILE | wc -l) -eq 0 ] ; then
    echo "Missing cross compiler. Set up PATH according to the README"
    exit 1
fi
# Unset CROSS_COMPILE so that if there is any native compiling needed it doesn't
# get cross compiled.
unset CROSS_COMPILE

# Package installations for various sections.
# This will build a minimal XFCE Kali system with a few tools.
# This is the section to edit if you would like to add more packages.
# See http://www.kali.org/new/kali-linux-metapackages/ for meta packages you can
# use.  You can also install packages, using just the package name, but keep in
# mind that not all packages work on ARM! If you specify one of those, the
# script will throw an error, but will still continue on, and create an unusable
# image, keep that in mind.

arm="abootimg cgpt fake-hwclock ntpdate u-boot-tools vboot-utils vboot-kernel-utils"
base="alsa-utils btrfs-tools e2fsprogs initramfs-tools kali-defaults kali-menu laptop-mode-tools parted sudo usbutils"
desktop="fonts-croscore fonts-crosextra-caladea fonts-crosextra-carlito gnome-theme-kali gtk3-engines-xfce kali-desktop-xfce kali-root-login lightdm network-manager network-manager-gnome xfce4 xserver-xorg-video-fbdev"
tools="aircrack-ng ethtool hydra john libnfc-bin mfoc nmap passing-the-hash sqlmap usbutils winexe wireshark"
services="apache2 openssh-server"
extras="iceweasel xfce4-terminal wpasupplicant"

packages="${arm} ${base} ${desktop} ${tools} ${services} ${extras}"
architecture="armhf"
# If you have your own preferred mirrors, set them here.
# After generating the rootfs, we set the sources.list to the default settings.
mirror=http.kali.org

# Set this to use an http proxy, like apt-cacher-ng, and uncomment further down
# to unset it.
#export http_proxy="http://localhost:3142/"

mkdir -p ${basedir}
cd ${basedir}

# create the rootfs - not much to modify here, except maybe the hostname.
debootstrap --foreign --arch $architecture kali-rolling kali-$architecture http://$mirror/kali

cp /usr/bin/qemu-arm-static kali-$architecture/usr/bin/

LANG=C chroot kali-$architecture /debootstrap/debootstrap --second-stage

# Create sources.list
cat << EOF > kali-$architecture/etc/apt/sources.list
deb http://$mirror/kali kali-rolling main contrib non-free
EOF

# Set hostname
echo "kali" > kali-$architecture/etc/hostname

# So X doesn't complain, we add kali to hosts
cat << EOF > kali-$architecture/etc/hosts
127.0.0.1       kali    localhost
::1             localhost ip6-localhost ip6-loopback
fe00::0         ip6-localnet
ff00::0         ip6-mcastprefix
ff02::1         ip6-allnodes
ff02::2         ip6-allrouters
EOF

cat << EOF > kali-$architecture/etc/network/interfaces
auto lo
iface lo inet loopback
EOF

cat << EOF > kali-$architecture/etc/resolv.conf
nameserver 8.8.8.8
EOF

export MALLOC_CHECK_=0 # workaround for LP: #520465
export LC_ALL=C
export DEBIAN_FRONTEND=noninteractive

mount -t proc proc kali-$architecture/proc
mount -o bind /dev/ kali-$architecture/dev/
mount -o bind /dev/pts kali-$architecture/dev/pts

cat << EOF > kali-$architecture/debconf.set
console-common console-data/keymap/policy select Select keymap from full list
console-common console-data/keymap/full select en-latin1-nodeadkeys
EOF

cat << EOF > kali-$architecture/third-stage
#!/bin/bash
dpkg-divert --add --local --divert /usr/sbin/invoke-rc.d.chroot --rename /usr/sbin/invoke-rc.d
cp /bin/true /usr/sbin/invoke-rc.d
echo -e "#!/bin/sh\nexit 101" > /usr/sbin/policy-rc.d
chmod +x /usr/sbin/policy-rc.d

apt-get update
apt-get --yes --force-yes install locales-all

debconf-set-selections /debconf.set
rm -f /debconf.set
apt-get update
apt-get -y install git-core binutils ca-certificates initramfs-tools u-boot-tools
apt-get -y install locales console-common less nano git
echo "root:toor" | chpasswd
sed -i -e 's/KERNEL\!=\"eth\*|/KERNEL\!=\"/' /lib/udev/rules.d/75-persistent-net-generator.rules
rm -f /etc/udev/rules.d/70-persistent-net.rules
export DEBIAN_FRONTEND=noninteractive
apt-get --yes --force-yes install $packages
apt-get --yes --force-yes dist-upgrade
apt-get --yes --force-yes autoremove

rm -f /usr/sbin/policy-rc.d
rm -f /usr/sbin/invoke-rc.d
dpkg-divert --remove --rename /usr/sbin/invoke-rc.d

rm -f /third-stage
EOF

chmod +x kali-$architecture/third-stage
LANG=C chroot kali-$architecture /third-stage

cat << EOF > kali-$architecture/cleanup
#!/bin/bash
rm -rf /root/.bash_history
apt-get update
apt-get clean
rm -f /0
rm -f /hs_err*
rm -f cleanup
rm -f /usr/bin/qemu*
EOF

chmod +x kali-$architecture/cleanup
LANG=C chroot kali-$architecture /cleanup

umount kali-$architecture/proc/sys/fs/binfmt_misc
umount kali-$architecture/dev/pts
umount kali-$architecture/dev/
umount kali-$architecture/proc

echo "Creating image file for Exynos-based Chromebooks"
dd if=/dev/zero of=${basedir}/kali-$1-exynos.img bs=1M count=7000
parted kali-$1-exynos.img --script -- mklabel gpt
cgpt create -z kali-$1-exynos.img
cgpt create kali-$1-exynos.img

cgpt add -i 1 -t kernel -b 8192 -s 32768 -l kernel -S 1 -T 5 -P 10 kali-$1-exynos.img
cgpt add -i 2 -t data -b 40960 -s `expr $(cgpt show kali-$1-exynos.img | grep 'Sec GPT table' | awk '{ print \$1 }')  - 40960` -l Root kali-$1-exynos.img

loopdevice=`losetup -f --show ${basedir}/kali-$1-exynos.img`
device=`kpartx -va $loopdevice| sed -E 's/.*(loop[0-9])p.*/\1/g' | head -1`
sleep 5
device="/dev/mapper/${device}"
bootp=${device}p1
rootp=${device}p2

mkfs.ext4 -L rootfs $rootp

mkdir -p ${basedir}/root
mount $rootp ${basedir}/root

echo "Rsyncing rootfs into image file"
rsync -HPavz -q ${basedir}/kali-$architecture/ ${basedir}/root/

cat << EOF > ${basedir}/root/etc/apt/sources.list
deb http://http.kali.org/kali kali-rolling main contrib non-free
deb-src http://http.kali.org/kali kali-rolling main contrib non-free
EOF

# Uncomment this if you use apt-cacher-ng otherwise git clones will fail.
#unset http_proxy

# Kernel section.  If you want to use a custom kernel, or configuration, replace
# them in this section.
git clone --depth 1 https://chromium.googlesource.com/chromiumos/third_party/kernel -b chromeos-3.8 ${basedir}/root/usr/src/kernel
cd ${basedir}/root/usr/src/kernel
cp ${basedir}/../kernel-configs/chromebook-3.8.config .config
cp ${basedir}/../kernel-configs/chromebook-3.8.config ../exynos.config
cp ${basedir}/../kernel-configs/chromebook-3.8_wireless-3.4.config exynos_wifi34.config
git rev-parse HEAD > ../kernel-at-commit
export ARCH=arm
# Edit the CROSS_COMPILE variable as needed.
export CROSS_COMPILE=arm-linux-gnueabihf-
patch -p1 --no-backup-if-mismatch < ${basedir}/../patches/mac80211.patch
patch -p1 --no-backup-if-mismatch < ${basedir}/../patches/0001-exynos-drm-smem-start-len.patch
patch -p1 --no-backup-if-mismatch < ${basedir}/../patches/0001-mwifiex-do-not-create-AP-and-P2P-interfaces-upon-dri.patch
make -j $(grep -c processor /proc/cpuinfo)
make dtbs
make modules_install INSTALL_MOD_PATH=${basedir}/root
cat << __EOF__ > ${basedir}/root/usr/src/kernel/arch/arm/boot/kernel-exynos.its
/dts-v1/;
 
/ {
    description = "Chrome OS kernel image with one or more FDT blobs";
    images {
        kernel@1{
            description = "kernel";
            data = /incbin/("zImage");
            type = "kernel_noload";
            arch = "arm";
            os = "linux";
            compression = "none";
            load = <0>;
            entry = <0>;
        };
        fdt@1{
            description = "exynos5250-skate.dtb";
            data = /incbin/("dts/exynos5250-skate.dtb");
            type = "flat_dt";
            arch = "arm";
            compression = "none";
            hash@1{
                algo = "sha1";
            };
        };
        fdt@2{
            description = "exynos5250-smdk5250.dtb";
            data = /incbin/("dts/exynos5250-smdk5250.dtb");
            type = "flat_dt";
            arch = "arm";
            compression = "none";
            hash@1{
                algo = "sha1";
            };
        };
        fdt@3{
            description = "exynos5250-snow-rev4.dtb";
            data = /incbin/("dts/exynos5250-snow-rev4.dtb");
            type = "flat_dt";
            arch = "arm";
            compression = "none";
            hash@1{
                algo = "sha1";
            };
        };
        fdt@4{
            description = "exynos5250-snow-rev5.dtb";
            data = /incbin/("dts/exynos5250-snow-rev5.dtb");
            type = "flat_dt";
            arch = "arm";
            compression = "none";
            hash@1{
                algo = "sha1";
            };
        };
        fdt@5{
            description = "exynos5250-spring.dtb";
            data = /incbin/("dts/exynos5250-spring.dtb");
            type = "flat_dt";
            arch = "arm";
            compression = "none";
            hash@1{
                algo = "sha1";
            };
        };
        fdt@6{
            description = "exynos5420-peach-kirby.dtb";
            data = /incbin/("dts/exynos5420-peach-kirby.dtb");
            type = "flat_dt";
            arch = "arm";
            compression = "none";
            hash@1{
                algo = "sha1";
            };
        };
        fdt@7{
            description = "exynos5420-peach-pit-rev3_5.dtb";
            data = /incbin/("dts/exynos5420-peach-pit-rev3_5.dtb");
            type = "flat_dt";
            arch = "arm";
            compression = "none";
            hash@1{
                algo = "sha1";
            };
        };
        fdt@8{
            description = "exynos5420-peach-pit-rev4.dtb";
            data = /incbin/("dts/exynos5420-peach-pit-rev4.dtb");
            type = "flat_dt";
            arch = "arm";
            compression = "none";
            hash@1{
                algo = "sha1";
            };
        };
        fdt@9{
            description = "exynos5420-peach-pit.dtb";
            data = /incbin/("dts/exynos5420-peach-pit.dtb");
            type = "flat_dt";
            arch = "arm";
            compression = "none";
            hash@1{
                algo = "sha1";
            };
        };
        fdt@10{
            description = "exynos5420-smdk5420.dtb";
            data = /incbin/("dts/exynos5420-smdk5420.dtb");
            type = "flat_dt";
            arch = "arm";
            compression = "none";
            hash@1{
                algo = "sha1";
            };
        };
        fdt@11{
            description = "exynos5420-smdk5420-evt0.dtb";
            data = /incbin/("dts/exynos5420-smdk5420-evt0.dtb");
            type = "flat_dt";
            arch = "arm";
            compression = "none";
            hash@1{
                algo = "sha1";
            };
        };
        fdt@12{
            description = "exynos5422-peach-pi.dtb";
            data = /incbin/("dts/exynos5422-peach-pi.dtb");
            type = "flat_dt";
            arch = "arm";
            compression = "none";
            hash@1{
                algo = "sha1";
            };
        };
        fdt@13{
            description = "exynos5440-ssdk5440.dtb";
            data = /incbin/("dts/exynos5440-ssdk5440.dtb");
            type = "flat_dt";
            arch = "arm";
            compression = "none";
            hash@1{
                algo = "sha1";
            };
        };
    };
    configurations {
        default = "conf@1";
        conf@1{
            kernel = "kernel@1";
            fdt = "fdt@1";
        };
        conf@2{
            kernel = "kernel@1";
            fdt = "fdt@2";
        };
        conf@3{
            kernel = "kernel@1";
            fdt = "fdt@3";
        };
        conf@4{
            kernel = "kernel@1";
            fdt = "fdt@4";
        };
        conf@5{
            kernel = "kernel@1";
            fdt = "fdt@5";
        };
        conf@6{
            kernel = "kernel@1";
            fdt = "fdt@6";
        };
        conf@7{
            kernel = "kernel@1";
            fdt = "fdt@7";
        };
        conf@8{
            kernel = "kernel@1";
            fdt = "fdt@8";
        };
        conf@9{
            kernel = "kernel@1";
            fdt = "fdt@9";
        };
        conf@10{
            kernel = "kernel@1";
            fdt = "fdt@10";
        };
        conf@11{
            kernel = "kernel@1";
            fdt = "fdt@11";
        };
        conf@12{
            kernel = "kernel@1";
            fdt = "fdt@12";
        };
        conf@13{
            kernel = "kernel@1";
            fdt = "fdt@13";
        };
    };
};
__EOF__
cd ${basedir}/root/usr/src/kernel/arch/arm/boot
mkimage -D "-I dts -O dtb -p 2048" -f kernel-exynos.its exynos-kernel

# microSD Card
echo 'noinitrd console=tty1 quiet root=PARTUUID=%U/PARTNROFF=1 rootwait rw lsm.module_locking=0 net.ifnames=0 rootfstype=ext4' > cmdline

# Pulled from ChromeOS, this is exactly what they do because there's no
# bootloader in the kernel partition on ARM.
dd if=/dev/zero of=bootloader.bin bs=512 count=1

vbutil_kernel --arch arm --pack ${basedir}/kernel.bin --keyblock /usr/share/vboot/devkeys/kernel.keyblock --signprivate /usr/share/vboot/devkeys/kernel_data_key.vbprivk --version 1 --config cmdline --bootloader bootloader.bin --vmlinuz exynos-kernel

cd ${basedir}/root/usr/src/kernel/
make mrproper
cp ../exynos.config .config
make modules_prepare
cd ${basedir}

# Bit of a hack to hide eMMC partitions from XFCE
cat << EOF > ${basedir}/root/etc/udev/rules.d/99-hide-emmc-partitions.rules
KERNEL=="mmcblk0*", ENV{UDISKS_IGNORE}="1"
EOF

# Touchpad configuration
mkdir -p ${basedir}/root/etc/X11/xorg.conf.d
cat << EOF > ${basedir}/root/etc/X11/xorg.conf.d/10-synaptics-chromebook.conf
Section "InputClass"
	Identifier		"touchpad"
	MatchIsTouchpad		"on"
	Driver			"synaptics"
	Option			"TapButton1"	"1"
	Option			"TapButton2"	"3"
	Option			"TapButton3"	"2"
	Option			"FingerLow"	"15"
	Option			"FingerHigh"	"20"
	Option			"FingerPress"	"256"
EndSection
EOF

# Mali GPU rules aka mali-rules package in ChromeOS
cat << EOF > ${basedir}/root/etc/udev/rules.d/50-mali.rules
KERNEL=="mali0", MODE="0660", GROUP="video"
EOF

# Video rules aka media-rules package in ChromeOS
cat << EOF > ${basedir}/root/etc/udev/rules.d/50-media.rules
ATTR{name}=="s5p-mfc-dec", SYMLINK+="video-dec"
ATTR{name}=="s5p-mfc-enc", SYMLINK+="video-enc"
ATTR{name}=="s5p-jpeg-dec", SYMLINK+="jpeg-dec"
ATTR{name}=="exynos-gsc.0*", SYMLINK+="image-proc0"
ATTR{name}=="exynos-gsc.1*", SYMLINK+="image-proc1"
ATTR{name}=="exynos-gsc.2*", SYMLINK+="image-proc2"
ATTR{name}=="exynos-gsc.3*", SYMLINK+="image-proc3"
ATTR{name}=="rk3288-vpu-dec", SYMLINK+="video-dec"
ATTR{name}=="rk3288-vpu-enc", SYMLINK+="video-enc"
ATTR{name}=="go2001-dec", SYMLINK+="video-dec"
ATTR{name}=="go2001-enc", SYMLINK+="video-enc"
ATTR{name}=="mt81xx-vcodec-dec", SYMLINK+="video-dec"
ATTR{name}=="mt81xx-vcodec-enc", SYMLINK+="video-enc"
ATTR{name}=="mt81xx-image-proc", SYMLINK+="image-proc0"
EOF

# This is for Peach - kinda a hack, never really worked properly they say.
# Ambient light sensor
cat << EOF > ${basedir}/root/lib/udev/light-sensor-set-multiplier.sh
#!/bin/sh

# Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

# In iio/devices, find device0 on 3.0.x kernels and iio:device0 on 3.2 kernels.
for FILE in /sys/bus/iio/devices/*/in_illuminance0_calibscale; do
  # Set the light sensor calibration value.
  echo 5.102040 > $FILE && break;
done

for FILE in /sys/bus/iio/devices/*/in_illuminance1_calibscale; do
  # Set the IR compensation calibration value.
  echo 0.053425 > $FILE && break;
done

for FILE in /sys/bus/iio/devices/*/range; do
  # Set the light sensor range value (max lux)
  echo 16000 > $FILE && break;
done

for FILE in /sys/bus/iio/devices/*/continuous; do
  # Change the measurement mode to the continuous mode
  echo als > $FILE && break;
done
EOF

cat << EOF > ${basedir}/root/lib/udev/rules.d/99-light-sensor.rules
# Calibrate the light sensor when the isl29018 driver is installed.
ACTION=="add", SUBSYSTEM=="drivers", KERNEL=="isl29018", RUN+="light-sensor-set-multiplier.sh"
EOF

cp ${basedir}/../misc/zram ${basedir}/root/etc/init.d/zram
chmod +x ${basedir}/root/etc/init.d/zram

rm -rf ${basedir}/root/lib/firmware
cd ${basedir}/root/lib
git clone https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git firmware
rm -rf ${basedir}/root/lib/firmware/.git
cd ${basedir}

# Unmount partitions
umount $rootp

dd if=${basedir}/kernel.bin of=$bootp

kpartx -dv $loopdevice
losetup -d $loopdevice

# Clean up all the temporary build stuff and remove the directories.
# Comment this out to keep things around if you want to see what may have gone
# wrong.
echo "Removing temporary build files"
rm -rf ${basedir}/kernel ${basedir}/kernel.bin ${basedir}/root ${basedir}/kali-$architecture ${basedir}/patches ${basedir}/bootloader.bin

# If you're building an image for yourself, comment all of this out, as you
# don't need the sha1sum or to compress the image, since you will be testing it
# soon.
echo "Generating sha1sum for kali-$1-exynos.img"
sha1sum kali-$1-exynos.img > ${basedir}/kali-$1-exynos.img.sha1sum
# Don't pixz on 32bit, there isn't enough memory to compress the images.
MACHINE_TYPE=`uname -m`
if [ ${MACHINE_TYPE} == 'x86_64' ]; then
echo "Compressing kali-$1-exynos.img"
pixz ${basedir}/kali-$1-exynos.img ${basedir}/kali-$1-exynos.img.xz
rm ${basedir}/kali-$1-exynos.img
echo "Generating sha1sum for kali-$1-exynos.img.xz"
sha1sum kali-$1-exynos.img.xz > ${basedir}/kali-$1-exynos.img.xz.sha1sum
fi