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#!/usr/bin/env bash
# script to automate extracting blobs from an existing vendor bios
# SPDX-FileCopyrightText: 2022 Caleb La Grange <thonkpeasant@protonmail.com>
# SPDX-License-Identifier: GPL-3.0-only
board="${1}"
vendor_rom="${2}"
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"
}
Build_deps(){
if [ ! -d me_cleaner ]; then
printf "downloading me_cleaner\n"
./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
else
printf "coreboot already downloaded. Skipping.\n"
printf "run ./download coreboot to manually overwrite\n"
fi
printf "building ifdtool from coreboot\n"
( cd coreboot/default/util/ifdtool && make )
}
Error_out(){
printf "failed to extract ${1}\nmake sure that your rom dump is valid\n"
exit 1
}
Extract_blobs(){
# TODO: find a better way to know which coreboot config to source
set -- "resources/coreboot/${board}/config/*"
. ${1} 2>/dev/null
. "resources/coreboot/${board}/board.cfg"
if [ "$CONFIG_HAVE_MRC" = "y" ]; then
printf 'haswell board detected, downloading mrc\n'
./download mrc
fi
_me_destination=${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 || Error_out me
printf "extracting gigabit ethernet firmware"
./coreboot/default/util/ifdtool/ifdtool -x ${vendor_rom}
mv flashregion*gbe.bin ${_gbe_destination} || Error_out gbe
# Cleans up other files extracted with ifdtool
rm flashregion*.bin 2> /dev/null
printf "gbe, ifd, and me extracted to ${_me_destination%/*}\n"
}
if [ ! -f "${vendor_rom}" ] ; then
Print_help
exit 1
fi
if [ ! -d "resources/coreboot/${board}" ]; then
Print_help
printf "build/roms: Target %s does not exist in the %s build system. Skipping build.\n" "${projectname}" "${board}"
exit 1
fi
if [ ! -f "resources/coreboot/${board}/board.cfg" ]; then
Print_help
printf "build/roms: Target %s does not have a board.cfg. Skipping build.\n" "${board}"
exit 1
fi
printf "extracting blobs for ${board} from ${vendor_rom}\n"
Build_deps
Extract_blobs
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