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#!/usr/bin/env sh
# script to automate extracting blobs from an existing vendor bios
# SPDX-FileCopyrightText: 2022 Caleb La Grange <thonkpeasant@protonmail.com>
# SPDX-FileCopyrightText: 2023 Leah Rowe <leah@libreboot.org>
# SPDX-License-Identifier: GPL-3.0-only
sname=""
board=""
vendor_rom=""
main()
{
sname=${0}
if [ $# -lt 2 ]; then
Fail "Missing arguments (less than two)."
fi
board="${1}"
vendor_rom="${2}"
Check_board
Build_deps
Extract_blobs
}
Check_board()
{
if [ ! -f "${vendor_rom}" ] ; then
Fail "file does not exist: ${vendor_rom}"
elif [ ! -d "resources/coreboot/${board}" ]; then
Fail "build/roms ${board}: target not defined"
elif [ ! -f "resources/coreboot/${board}/board.cfg" ]; then
Fail "build/roms ${board}: missing board.cfg"
fi
}
Build_deps(){
if [ ! -d me_cleaner ]; then
printf "downloading me_cleaner\n"
./download me_cleaner || Fail 'could not download me_cleaner'
else
printf "me_cleaner already downloaded. Skipping.\n"
printf "run ./download me_cleaner to manually overwrite\n"
fi
if [ ! -d coreboot/default ]; then
printf "downloading coreboot\n"
./download coreboot default \
|| Fail "could not download coreboot"
else
printf "coreboot already downloaded. Skipping.\n"
printf "run ./download coreboot to manually overwrite\n"
fi
if ! [ -f coreboot/default/util/ifdtool/ifdtool ]; then
printf "building ifdtool from coreboot\n"
make -C coreboot/default/util/ifdtool \
|| Fail "could not build ifdtool"
fi
}
Extract_blobs(){
printf "extracting blobs for %s from %s\n" ${board} ${vendor_rom}
# TODO: find a better way to know which coreboot config to source
set -- "resources/coreboot/${board}/config/"*
. ${1} 2>/dev/null
. "resources/coreboot/${board}/board.cfg"
if [ "$CONFIG_HAVE_MRC" = "y" ]; then
printf 'haswell board detected, downloading mrc\n'
./download mrc || Fail "could not download mrc"
fi
_me_destination=${CONFIG_ME_BIN_PATH#../../}
_gbe_destination=${CONFIG_GBE_BIN_PATH#../../}
_ifd_destination=${CONFIG_IFD_BIN_PATH#../../}
printf "extracting clean ime and modified ifd\n"
./me_cleaner/me_cleaner.py -D ${_ifd_destination} \
-M ${_me_destination} ${vendor_rom} -t -r -S || \
./resources/blobs/me7_update_parser.py
-O ${_me_destination} ${vendor_rom} \
|| Fail 'me_cleaner failed to extract blobs from rom'
printf "extracting gigabit ethernet firmware"
./coreboot/default/util/ifdtool/ifdtool -x ${vendor_rom}
mv flashregion*gbe.bin ${_gbe_destination} \
|| Fail 'could not extract gbe'
# Cleans up other files extracted with ifdtool
rm flashregion*.bin 2> /dev/null
if [ -f ${_ifd_destination} ]; then
printf "gbe, ifd, and me extracted to ${_me_destination%/*}\n"
else
printf "WARNING: Intel firmware descriptor could not "
printf "be extracted with modified me\n"
fi
}
Fail(){
Print_help
printf "\n%s: ERROR: %s\n" ${sname} $@
exit 1
}
Print_help(){
printf "Usage: ./blobutil extract {boardname} {path/to/vendor_rom}\n"
printf "Example: ./blobutil extract x230 12mb_flash.bin\n"
printf "\nYou need to specify exactly 2 arguments\n"
}
main $@
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