util: Add scripts to download and extract blobs
This turned out really handy when I tried to build coreboot for my Chromebox. 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 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 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 Change-Id: I5fb7e14b10e03e18cd360bc35f1dc92e8ed34e63 Signed-off-by: Joe Pillow <joseph.a.pillow@gmail.com> Reviewed-on: https://review.coreboot.org/13752 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth <martinroth@google.com>
This commit is contained in:
Joe Pillow
Stefan Reinauer
parent
09f2921b5d
commit
9a4881a783
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Chrome OS binary extraction
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===========================
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These scripts can be used to extract System Agent reference code
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and other blobs (e.g. mrc.bin, refcode, VGA option roms) from a
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Chrome OS recovery image.
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crosfirmware.sh
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---------------
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crosfirmware.sh downloads a Chrome OS recovery image from the recovery
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image server, unpacks it, extracts the firmware update shell archive,
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extracts the firmware images from the shell archive.
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To download all Chrome OS firmware images, run
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$ ./crosfirmware.sh
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To download, e.g. the Panther firmware image, run
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$ ./crosfirmware.sh panther
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extract_blobs.sh
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----------------
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extract_blobs.sh extracts the blobs from a Chrome OS firmware image.
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Right now it will produce the ME firmware blob, IFD, VGA option rom,
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and mrc.bin
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#!/bin/bash -x
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#
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# This file is part of the coreboot project.
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#
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# Copyright (C) 2016 Joe Pillow
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; version 2 of the License.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# This script needs
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# * sharutils
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#DEBUG=1
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debug()
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{
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test "$DEBUG" == "1" && echo "$*"
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}
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get_inventory()
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{
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_conf=$1
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_url=https://dl.google.com/dl/edgedl/chromeos/recovery/recovery.conf
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debug "Downloading recovery image inventory..."
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curl -s "$_url" > $_conf
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}
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download_image()
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{
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_url=$1
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_file=$2
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debug "Downloading recovery image"
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curl -s "$_url" > "$_file.zip"
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debug "Decompressing recovery image"
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unzip -q "$_file.zip"
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rm "$_file.zip"
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}
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extract_partition()
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{
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NAME=$1
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FILE=$2
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ROOTFS=$3
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_bs=1024
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debug "Extracting ROOT-A partition"
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ROOTP=$( printf "unit\nB\nprint\nquit\n" | parted $FILE | grep $NAME )
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START=$(( $( echo $ROOTP | cut -f2 -d\ | tr -d "B" ) ))
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SIZE=$(( $( echo $ROOTP | cut -f4 -d\ | tr -d "B" ) ))
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dd if=$FILE of=$ROOTFS bs=$_bs skip=$(( $START / $_bs )) \
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count=$(( $SIZE / $_bs )) > /dev/null 2>&1
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}
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extract_shellball()
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{
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ROOTFS=$1
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SHELLBALL=$2
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debug "Extracting chromeos-firmwareupdate"
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printf "cd /usr/sbin\ndump chromeos-firmwareupdate $SHELLBALL\nquit" | \
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debugfs $ROOTFS > /dev/null 2>&1
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}
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extract_coreboot()
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{
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_shellball=$1
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_unpacked=$( mktemp -d )
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debug "Extracting coreboot image"
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sh $_shellball --sb_extract $_unpacked > /dev/null
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_version=$( cat $_unpacked/VERSION | grep BIOS\ version: | \
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cut -f2 -d: | tr -d \ )
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cp $_unpacked/bios.bin coreboot-$_version.bin
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rm -r "$_unpacked"
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}
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do_one_board()
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{
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_board=$1
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_url=$2
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_file=$3
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download_image $_url $_file
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extract_partition ROOT-A $_file root-a.ext2
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extract_shellball root-a.ext2 chromeos-firmwareupdate-$_board
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rm $_file root-a.ext2
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extract_coreboot chromeos-firmwareupdate-$_board
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}
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#
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# Main
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#
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BOARD=$1
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if [ "$BOARD" == "all" ]; then
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CONF=$( mktemp )
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get_inventory $CONF
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grep ^name= $CONF| while read _line; do
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name=$( echo $_line | cut -f2 -d= )
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echo Processing board $name
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eval $( grep -v hwid= $CONF | grep -A11 "$_line" | \
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grep '\(url=\|file=\)' )
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BOARD=$( echo $url | cut -f3 -d_ )
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do_one_board $BOARD $url $file
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done
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rm "$CONF"
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elif [ "$BOARD" != "" ]; then
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CONF=$( mktemp )
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get_inventory $CONF
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echo Processing board $BOARD
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eval $( grep $BOARD $CONF | grep '\(url=\|file=\)' )
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do_one_board $BOARD $url $file
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rm "$CONF"
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else
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echo "Usage: $0 <boardname>"
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echo " $0 all"
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echo
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exit 1
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fi
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@ -0,0 +1,51 @@
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#!/bin/bash -x
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#
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# This file is part of the coreboot project.
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#
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# Copyright (C) 2016 Joe Pillow
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; version 2 of the License.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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IMAGE=$1
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if [ ! -r "$IMAGE" ]; then
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echo "Can't find image $IMAGE."
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exit 1
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fi
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CBFSTOOL=$(which cbfstool)
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if [ $? != 0 ]; then
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echo "Can't find cbfstool."
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exit 1
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fi
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IFDTOOL=$(which ifdtool)
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if [ $? != 0 ]; then
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echo "Can't find ifdtool."
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exit 1
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fi
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$CBFSTOOL $IMAGE print
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if [ $? -ne 0 ]; then
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echo "Not a coreboot image: $IMAGE"
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exit 1
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fi
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PCI=$($CBFSTOOL $IMAGE print|grep pci|cut -f1 -d\ )
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MRC=$($CBFSTOOL $IMAGE print|grep mrc.bin|cut -f1 -d\ )
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$CBFSTOOL $IMAGE extract -n $PCI -f $PCI
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$CBFSTOOL $IMAGE extract -n $MRC -f $MRC
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$IFDTOOL -x $IMAGE
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mv flashregion_0_flashdescriptor.bin flashdescriptor.bin
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mv flashregion_2_intel_me.bin me.bin
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rm flashregion_*.bin
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