diff options
| -rw-r--r-- | util/chromeos/README.md | 27 | ||||
| -rw-r--r-- | util/chromeos/crosfirmware.sh | 140 | ||||
| -rw-r--r-- | util/chromeos/extract_blobs.sh | 51 |
3 files changed, 218 insertions, 0 deletions
diff --git a/util/chromeos/README.md b/util/chromeos/README.md new file mode 100644 index 0000000000..3c3d721a3c --- /dev/null +++ b/util/chromeos/README.md @@ -0,0 +1,27 @@ +Chrome OS binary extraction +=========================== + +These scripts can be used to extract System Agent reference code +and other blobs (e.g. mrc.bin, refcode, VGA option roms) from a +Chrome OS recovery image. + +crosfirmware.sh +--------------- + +crosfirmware.sh downloads a Chrome OS recovery image from the recovery +image server, unpacks it, extracts the firmware update shell archive, +extracts the firmware images from the shell archive. + +To download all Chrome OS firmware images, run +$ ./crosfirmware.sh + +To download, e.g. the Panther firmware image, run +$ ./crosfirmware.sh panther + +extract_blobs.sh +---------------- + +extract_blobs.sh extracts the blobs from a Chrome OS firmware image. + +Right now it will produce the ME firmware blob, IFD, VGA option rom, +and mrc.bin diff --git a/util/chromeos/crosfirmware.sh b/util/chromeos/crosfirmware.sh new file mode 100644 index 0000000000..a4cb487c2c --- /dev/null +++ b/util/chromeos/crosfirmware.sh @@ -0,0 +1,140 @@ +#!/bin/bash -x +# +# This file is part of the coreboot project. +# +# Copyright (C) 2016 Joe Pillow +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; version 2 of the License. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# + +# This script needs +# * sharutils + +#DEBUG=1 + +debug() +{ + test "$DEBUG" == "1" && echo "$*" +} + +get_inventory() +{ + _conf=$1 + _url=https://dl.google.com/dl/edgedl/chromeos/recovery/recovery.conf + + debug "Downloading recovery image inventory..." + + curl -s "$_url" > $_conf +} + +download_image() +{ + _url=$1 + _file=$2 + + debug "Downloading recovery image" + curl -s "$_url" > "$_file.zip" + debug "Decompressing recovery image" + unzip -q "$_file.zip" + rm "$_file.zip" +} + +extract_partition() +{ + NAME=$1 + FILE=$2 + ROOTFS=$3 + _bs=1024 + + debug "Extracting ROOT-A partition" + ROOTP=$( printf "unit\nB\nprint\nquit\n" | parted $FILE | grep $NAME ) + + START=$(( $( echo $ROOTP | cut -f2 -d\ | tr -d "B" ) )) + SIZE=$(( $( echo $ROOTP | cut -f4 -d\ | tr -d "B" ) )) + + dd if=$FILE of=$ROOTFS bs=$_bs skip=$(( $START / $_bs )) \ + count=$(( $SIZE / $_bs )) > /dev/null 2>&1 +} + +extract_shellball() +{ + ROOTFS=$1 + SHELLBALL=$2 + + debug "Extracting chromeos-firmwareupdate" + printf "cd /usr/sbin\ndump chromeos-firmwareupdate $SHELLBALL\nquit" | \ + debugfs $ROOTFS > /dev/null 2>&1 +} + +extract_coreboot() +{ + _shellball=$1 + _unpacked=$( mktemp -d ) + + debug "Extracting coreboot image" + sh $_shellball --sb_extract $_unpacked > /dev/null + + _version=$( cat $_unpacked/VERSION | grep BIOS\ version: | \ + cut -f2 -d: | tr -d \ ) + + cp $_unpacked/bios.bin coreboot-$_version.bin + rm -r "$_unpacked" +} + +do_one_board() +{ + _board=$1 + _url=$2 + _file=$3 + + download_image $_url $_file + + extract_partition ROOT-A $_file root-a.ext2 + extract_shellball root-a.ext2 chromeos-firmwareupdate-$_board + rm $_file root-a.ext2 + + extract_coreboot chromeos-firmwareupdate-$_board +} + +# +# Main +# + +BOARD=$1 + +if [ "$BOARD" == "all" ]; then + CONF=$( mktemp ) + get_inventory $CONF + + grep ^name= $CONF| while read _line; do + name=$( echo $_line | cut -f2 -d= ) + echo Processing board $name + eval $( grep -v hwid= $CONF | grep -A11 "$_line" | \ + grep '\(url=\|file=\)' ) + BOARD=$( echo $url | cut -f3 -d_ ) + do_one_board $BOARD $url $file + done + + rm "$CONF" +elif [ "$BOARD" != "" ]; then + CONF=$( mktemp ) + get_inventory $CONF + + echo Processing board $BOARD + eval $( grep $BOARD $CONF | grep '\(url=\|file=\)' ) + do_one_board $BOARD $url $file + + rm "$CONF" +else + echo "Usage: $0 <boardname>" + echo " $0 all" + echo + exit 1 +fi diff --git a/util/chromeos/extract_blobs.sh b/util/chromeos/extract_blobs.sh new file mode 100644 index 0000000000..af9d026234 --- /dev/null +++ b/util/chromeos/extract_blobs.sh @@ -0,0 +1,51 @@ +#!/bin/bash -x +# +# This file is part of the coreboot project. +# +# Copyright (C) 2016 Joe Pillow +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; version 2 of the License. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# + +IMAGE=$1 + +if [ ! -r "$IMAGE" ]; then + echo "Can't find image $IMAGE." + exit 1 +fi + +CBFSTOOL=$(which cbfstool) +if [ $? != 0 ]; then + echo "Can't find cbfstool." + exit 1 +fi + +IFDTOOL=$(which ifdtool) +if [ $? != 0 ]; then + echo "Can't find ifdtool." + exit 1 +fi + +$CBFSTOOL $IMAGE print + +if [ $? -ne 0 ]; then + echo "Not a coreboot image: $IMAGE" + exit 1 +fi + +PCI=$($CBFSTOOL $IMAGE print|grep pci|cut -f1 -d\ ) +MRC=$($CBFSTOOL $IMAGE print|grep mrc.bin|cut -f1 -d\ ) + +$CBFSTOOL $IMAGE extract -n $PCI -f $PCI +$CBFSTOOL $IMAGE extract -n $MRC -f $MRC +$IFDTOOL -x $IMAGE +mv flashregion_0_flashdescriptor.bin flashdescriptor.bin +mv flashregion_2_intel_me.bin me.bin +rm flashregion_*.bin |