| #!/bin/bash |
| |
| # Copyright (c) 2011 The Chromium OS Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| # make_netboot.sh --board=[board] |
| # |
| # This script validates that the current latest image is an install shim, |
| # and generates a netboot image from it. This pulls the u-boot kernel |
| # image bundle (uimg), the legacy firmware for netbooting, and the install |
| # shim kernel image, bundled as a uboot gz/uimg, and places them in a |
| # "netboot" subfolder. |
| |
| SCRIPT_ROOT=$(dirname $(readlink -f "$0")) |
| . "${SCRIPT_ROOT}/common.sh" || exit 1 |
| |
| # Script must be run inside the chroot. |
| restart_in_chroot_if_needed "$@" |
| |
| DEFINE_string board "${DEFAULT_BOARD}" \ |
| "The board to build an image for." |
| DEFINE_string image "" "Path to the image to use" |
| |
| # Parse command line. |
| FLAGS "$@" || exit 1 |
| eval set -- "${FLAGS_ARGV}" |
| |
| . "${SCRIPT_ROOT}/build_library/build_common.sh" || exit 1 |
| . "${BUILD_LIBRARY_DIR}/board_options.sh" || exit 1 |
| |
| switch_to_strict_mode |
| # build_packages artifact output. |
| SYSROOT="${GCLIENT_ROOT}/chroot/build/${FLAGS_board}" |
| # build_image artifact output. |
| IMAGES_DIR="${CHROOT_TRUNK_DIR}/src/build/images" |
| |
| if [ -n "${FLAGS_image}" ]; then |
| cd $(dirname "${FLAGS_image}") |
| INSTALL_SHIM=$(basename "${FLAGS_image}") |
| else |
| cd ${IMAGES_DIR}/${FLAGS_board}/latest |
| # Canonical install shim name. |
| INSTALL_SHIM="factory_install_shim.bin" |
| fi |
| |
| if [ ! -f "${INSTALL_SHIM}" ]; then |
| echo "Cannot locate ${INSTALL_SHIM}, nothing to netbootify!" |
| exit 1 |
| fi |
| |
| # Generate staging dir for netboot files. |
| sudo rm -rf netboot |
| mkdir -p netboot |
| |
| # Get netboot firmware. |
| # TODO(nsanders): Set default IP here when userspace |
| # env modification is available. |
| # TODO(nsanders): ARM generic doesn't build chromeos-u-boot package. |
| # When ARM generic goes away, delete the test. |
| if ls "${SYSROOT}"/firmware/nv_image-*.bin >/dev/null 2>&1; then |
| echo "Copying netboot firmware nv_image-*.bin" |
| cp -v "${SYSROOT}"/firmware/nv_image-*.bin "netboot" |
| else |
| echo "Skipping netboot firmware: " \ |
| "${SYSROOT}/firmware/nv_image-*.bin not present?" |
| fi |
| |
| # Prepare to mount rootfs. |
| umount_loop() { |
| safe_umount r || true |
| safe_umount s || true |
| false |
| } |
| |
| echo "Unpack factory install shim partitions" |
| ./unpack_partitions.sh "${INSTALL_SHIM}" |
| |
| # Genrate clean mountpoints. |
| sudo rm -rf r s |
| mkdir -p r s |
| |
| # Clean ROified filesystem headers, and mount. |
| trap "umount_loop" EXIT |
| enable_rw_mount part_3 |
| sudo mount -o loop part_3 r |
| sudo mount -o loop part_1 s |
| echo "Mount install shim rootfs (partition 3)" |
| |
| if [ "${ARCH}" = "arm" ]; then |
| export MKIMAGE_ARCH="arm" |
| else |
| export MKIMAGE_ARCH="x86" # including amd64 |
| fi |
| |
| # Get netboot kernel. |
| echo "Building kernel" |
| |
| # Create temporary emerge root |
| temp_build_path="$(mktemp -d bk_XXXXXXXX)" |
| if ! [ -d "${temp_build_path}" ]; then |
| echo "Failed to create temporary directory." |
| exit 1 |
| fi |
| |
| # Emerge network boot kernel |
| # We don't want to build whole install shim everytime we run this script, |
| # and thus we only build kernel here. If this script is run against install |
| # shim with different kernel version, this might not work. But as we don't |
| # upgrade kernel so often, this is probably fine. |
| export USE='vfat blkdevram fbconsole i2cdev' |
| export EMERGE_BOARD_CMD="emerge-${FLAGS_board}" |
| emerge_custom_kernel ${temp_build_path} |
| |
| # Generate kernel uImage |
| echo "Generating netboot kernel vmlinux.uimg" |
| |
| if [ "${ARCH}" = "arm" ]; then |
| cp "${temp_build_path}"/boot/vmlinux.uimg netboot/ |
| else |
| # U-boot put kernel image at 0x100000. We load it at 0x3000000 because |
| # 0x3000000 is safe enough not to overlap with image at 0x100000. |
| mkimage -A "${MKIMAGE_ARCH}" -O linux -T kernel -n "Linux kernel" -C none \ |
| -d "${temp_build_path}"/boot/vmlinuz \ |
| -a 0x03000000 -e 0x03000000 netboot/vmlinux.uimg |
| fi |
| |
| # Clean up temporary emerge root |
| sudo rm -rf "${temp_build_path}" |
| |
| echo "Add lsb-factory" |
| # Copy factory config file. |
| # TODO(nsanders): switch this to u-boot env var config. |
| LSB_FACTORY_DIR="mnt/stateful_partition/dev_image/etc" |
| sudo mkdir -p "r/${LSB_FACTORY_DIR}" |
| sudo cp "s/dev_image/etc/lsb-factory" "r/${LSB_FACTORY_DIR}" |
| |
| # Clean up mounts. |
| trap - EXIT |
| safe_umount r s |
| sudo rm -rf r s |
| |
| # Generate an initrd fo u-boot to load. |
| gzip -9 -c part_3 > ext2_rootfs.gz |
| echo "Generating netboot rootfs initrd.uimg" |
| # U-boot's uimg wrapper specifies where we will load the blob into memory. |
| # tftp boot's default root address is set to 0x12008000 in legacy_image.bin, |
| # so we want to unpack it there. |
| mkimage -A "${MKIMAGE_ARCH}" -O linux -T ramdisk -a 0x12008000 \ |
| -n "Factory Install RootFS" -C gzip -d ext2_rootfs.gz \ |
| netboot/initrd.uimg |
| |
| # Cleanup |
| rm -rf ext2_rootfs.gz part_* |