[PATCH 3/5] Unify efi and legacy bootloader configuration generation

build_image

 #!/bin/bash
 
 # Copyright (c) 2009 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.
 
 # Script to build a bootable keyfob-based chromeos system image from within
 # a chromiumos setup. This assumes that all needed packages have been built into
 # the given target's root with binary packages turned on. This script will
 # build the Chrome OS image using only pre-built binary packages.
@@ skipping 385 matching lines @@
   dd if=/dev/zero of="${OEM_FS_IMG}" bs=1 count=1 seek=$((OEM_SIZE_BYTES - 1))
 
   # Tune and mount OEM partner partition.
   UUID=$(uuidgen)
   DISK_LABEL="C-OEM"
   sudo losetup "${OEM_LOOP_DEV}" "${OEM_FS_IMG}"
   sudo mkfs.ext3 "${OEM_LOOP_DEV}"
   sudo tune2fs -L "${DISK_LABEL}" -U "${UUID}" -c 0 -i 0 "${OEM_LOOP_DEV}"
   sudo mount "${OEM_LOOP_DEV}" "${OEM_FS_DIR}"
 
-  # Turn root file system into bootable image.
-  if [[ "${ARCH}" = "x86" ]]; then
-    # Setup extlinux configuration.
-    # TODO: For some reason the /dev/disk/by-uuid is not being generated by udev
-    # in the initramfs. When we figure that out, switch to root=UUID=${UUID}.
-    sudo mkdir -p "${ROOT_FS_DIR}"/boot
-    # TODO(adlr): use initramfs for booting.
-    cat <<EOF | sudo dd of="${ROOT_FS_DIR}"/boot/extlinux.conf
-DEFAULT chromeos-usb
-PROMPT 0
-TIMEOUT 0
-
-label chromeos-usb
-  menu label chromeos-usb
-  kernel vmlinuz
-  append quiet console=tty2 init=/sbin/init boot=local rootwait root=/dev/sdb3 ro noresume noswap i915.modeset=1 loglevel=1 cros_legacy
-
-label chromeos-hd
-  menu label chromeos-hd
-  kernel vmlinuz
-  append quiet console=tty2 init=/sbin/init boot=local rootwait root=HDROOT ro noresume noswap i915.modeset=1 loglevel=1 cros_legacy
-EOF
-
-    # Make partition bootable and label it.
-    sudo extlinux -z --install "${ROOT_FS_DIR}/boot"
-  fi
-
   # -- Install packages into the root file system --
 
   # We need to install libc manually from the cross toolchain.
   # TODO: Improve this? We only want libc and not the whole toolchain.
   PKGDIR="/var/lib/portage/pkgs/cross/"
   sudo tar jxvpf \
     "${PKGDIR}/${CHOST}/cross-${CHOST}"/glibc-${LIBC_VERSION}.tbz2 \
     -C "${ROOT_FS_DIR}" --strip-components=3 \
     --exclude=usr/include --exclude=sys-include --exclude=*.a --exclude=*.o
 
@@ skipping 35 matching lines @@
   # We'll hard-code it to 16M for now.
   ESP_BLOCKS=16384
   /usr/sbin/mkfs.vfat -C ${OUTPUT_DIR}/esp.image ${ESP_BLOCKS}
   ESP_LOOP_DEV=$(sudo losetup -f)
   if [ -z "${ESP_LOOP_DEV}" ] ; then
     echo "No free loop device.  Free up a loop device or reboot.  exiting. "
     exit 1
   fi
   sudo losetup "${ESP_LOOP_DEV}" "${ESP_FS_IMG}"
   sudo mount "${ESP_LOOP_DEV}" "${ESP_FS_DIR}"
-  sudo mkdir -p "${ESP_FS_DIR}/efi/boot"
-  sudo grub-mkimage -p /efi/boot -o "${ESP_FS_DIR}/efi/boot/bootx64.efi" \
-    part_gpt fat ext2 normal boot sh chain configfile linux
-  cat <<'EOF' | sudo dd of="${ESP_FS_DIR}/efi/boot/grub.cfg"
-set default=0
-set timeout=2
 
-# NOTE: These magic grub variables are a Chrome OS hack. They are not portable.
+  # Populates the root filesystem with legacy bootloader templates
+  # appropriate for the platform.  The autoupdater and installer will
+  # use those templates to update the legacy boot partition (12/ESP)
+  # on update.
+  # (This script does not populate vmlinuz.A and .B needed by syslinux.)
+  use_vboot=
+  ${SCRIPTS_DIR}/create_legacy_bootloader_templates.sh \
+    --arch=${ARCH} \
+    --to="${ROOT_FS_DIR}"/boot \
+    --install \
+    ${use_vboot}
 
-menuentry "local image A" {
-  linux $grubpartA/boot/vmlinuz quiet console=tty2 init=/sbin/init boot=local rootwait root=/dev/$linuxpartA ro noresume noswap i915.modeset=1 loglevel=1 cros_efi
-}
+  # Create a working copy so we don't need the rootfs mounted
+  sudo mkdir -p "${OUTPUT_DIR}"/boot
+  # This will include any built files dropped in /boot as well.
+  # Like the current vmlinuz.
+  sudo cp -r "${ROOT_FS_DIR}"/boot/. "${OUTPUT_DIR}"/boot/
 
-menuentry "local image B" {
-  linux $grubpartB/boot/vmlinuz quiet console=tty2 init=/sbin/init boot=local rootwait root=/dev/$linuxpartB ro noresume noswap i915.modeset=1 loglevel=1 cros_efi
-}
-
-menuentry "Alternate USB Boot" {
-  linux (hd0,3)/boot/vmlinuz quiet console=tty2 init=/sbin/init boot=local rootwait root=/dev/sdb3 ro noresume noswap i915.modeset=1 loglevel=1 cros_efi
-}
-
-EOF
-  # TODO(wad) add baseline syslinux files to ESP and install the syslinux loader
+  # Until bootloader management is unified, copy EFI in here.
+  sudo mkdir -p "${ESP_FS_IMG}"/efi
+  sudo cp -r "${ROOT_FS_DIR}"/boot/efi/. "${ESP_FS_IMG}"/efi
 
   # Builds the kernel partition image.  The temporary files are kept around
   # so that we can perform a load_kernel_test later on the final image.
   # TODO(wad) add dm-verity boot args (--boot_args, --root)
   ${SCRIPTS_DIR}/build_kernel_image.sh \
     --arch="${ARCH}" \
     --to="${OUTPUT_DIR}/vmlinuz.image" \
     --vmlinuz="${ROOT_FS_DIR}/boot/vmlinuz" \
     --working_dir="${OUTPUT_DIR}" \
     --keep_work \
@@ skipping 96 matching lines @@
   echo "Developer image created as ${DEVELOPER_IMAGE_NAME}"
 fi
 
 print_time_elapsed
 
 echo "To copy to USB keyfob, OUTSIDE the chroot, do something like:"
 echo "  ./image_to_usb.sh --from=${OUTSIDE_OUTPUT_DIR} --to=/dev/sdX"
 echo "To convert to VMWare image, OUTSIDE the chroot, do something like:"
 echo "  ./image_to_vmware.sh --from=${OUTSIDE_OUTPUT_DIR}"
 echo "from the scripts directory where you entered the chroot."