77 lines
2.3 KiB
Bash
Executable File
77 lines
2.3 KiB
Bash
Executable File
# SPDX-License-Identifier: GPL-2.0-only
|
|
|
|
# Logic based on util/chromeos/crosfirmware.sh in coreboot cfc26ce278.
|
|
# Modifications in this version are Copyright 2021 and 2023 Leah Rowe.
|
|
# Original copyright detailed in repo: https://review.coreboot.org/coreboot/
|
|
|
|
eval "$(setvars "" MRC_url MRC_url_bkup MRC_hash MRC_board ROOTFS SHELLBALL)"
|
|
|
|
extract_mrc()
|
|
{
|
|
[ -z "${MRC_board}" ] && err "extract_mrc $MRC_hash: MRC_board not set"
|
|
[ -z "${CONFIG_MRC_FILE}" ] && \
|
|
err "extract_mrc $MRC_hash: CONFIG_MRC_FILE not set"
|
|
|
|
ROOTFS="root-a.ext2"
|
|
SHELLBALL="chromeos-firmwareupdate-${MRC_board}"
|
|
|
|
(
|
|
x_ cd "${appdir}"
|
|
extract_partition
|
|
extract_shellball
|
|
extract_coreboot
|
|
) || err "mrc download/extract failure"
|
|
|
|
"${cbfstool}" "${appdir}/"coreboot-*.bin extract -n mrc.bin \
|
|
-f "${_dest}" -r RO_SECTION || err "extract_mrc: cbfstool ${_dest}"
|
|
}
|
|
|
|
extract_partition()
|
|
{
|
|
NAME="ROOT-A"
|
|
FILE="${MRC_url##*/}"
|
|
FILE="${FILE%.zip}"
|
|
_bs=1024
|
|
|
|
printf "Extracting ROOT-A partition\n"
|
|
ROOTP=$( printf "unit\nB\nprint\nquit\n" | \
|
|
parted "${FILE}" 2>/dev/null | grep "${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} )) || \
|
|
err "extract_partition, dd ${FILE}, ${ROOTFS}"
|
|
}
|
|
|
|
extract_shellball()
|
|
{
|
|
printf "Extracting chromeos-firmwareupdate\n"
|
|
printf "cd /usr/sbin\ndump chromeos-firmwareupdate ${SHELLBALL}\nquit" \
|
|
| debugfs "${ROOTFS}" || err "extract_shellball: debugfs"
|
|
}
|
|
|
|
extract_coreboot()
|
|
{
|
|
_unpacked=$( mktemp -d )
|
|
|
|
printf "Extracting coreboot image\n"
|
|
[ -f "${SHELLBALL}" ] || \
|
|
err "extract_coreboot: shellball missing in google cros image"
|
|
sh "${SHELLBALL}" --unpack "${_unpacked}" || err "shellball, ${SHELLBALL}"
|
|
|
|
# TODO: audit the f* out of that shellball, for each mrc version.
|
|
# it has to be updated for each mrc update. we should ideally
|
|
# implement the functionality ourselves.
|
|
|
|
[ -f "${_unpacked}/VERSION" ] || \
|
|
err "extract_coreboot: VERSION file missing on google coreboot rom"
|
|
|
|
_version=$( cat "${_unpacked}/VERSION" | grep BIOS\ version: | \
|
|
cut -f2 -d: | tr -d \ )
|
|
|
|
cp "${_unpacked}/bios.bin" "coreboot-${_version}.bin" || \
|
|
err "!cp unpacked, ${_unpacked}/bios.bin, coreboot-${_version}.rom"
|
|
}
|