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Create a fourth partition to put the raw kernel image in.

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This is a short term fix for machines that can't boot a kernel from
the root file system of an SDCard.

This issue depends on issue 602027.

Review URL: http://codereview.chromium.org/600074
This commit is contained in:
robotboy 2010-02-11 17:33:32 -08:00
parent 2ea03ac0fc
commit 18ff72b913
2 changed files with 72 additions and 0 deletions
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11
image_to_usb.sh
View File

@ -19,6 +19,8 @@ DEFINE_string to "" "$DEFAULT_TO_HELP"
DEFINE_boolean yes $FLAGS_FALSE "Answer yes to all prompts" "y" DEFINE_boolean yes $FLAGS_FALSE "Answer yes to all prompts" "y"
DEFINE_boolean install_autotest $FLAGS_FALSE \ DEFINE_boolean install_autotest $FLAGS_FALSE \
"Whether to install autotest to the stateful partition." "Whether to install autotest to the stateful partition."
DEFINE_boolean copy_kernel $FLAGS_FALSE \
"Copy the kernel to the fourth partition."
# Parse command line # Parse command line
FLAGS "$@" || exit 1 FLAGS "$@" || exit 1
@ -159,6 +161,15 @@ then
trap - EXIT trap - EXIT
if [ $FLAGS_copy_kernel -eq $FLAGS_TRUE ]
then
echo "Copying Kernel..."
"${SCRIPTS_DIR}"/kernel_fetcher.sh \
--from "${FLAGS_from}" \
--to "${FLAGS_to}" \
--offset "$(( ($PART_SIZE * 3) + 512 ))"
fi
echo "Copying MBR..." echo "Copying MBR..."
sudo "${SCRIPTS_DIR}"/file_copy.py \ sudo "${SCRIPTS_DIR}"/file_copy.py \
if="${FLAGS_from}/mbr.image" of="$FLAGS_to" if="${FLAGS_from}/mbr.image" of="$FLAGS_to"

61
kernel_fetcher.sh Executable file
View File

@ -0,0 +1,61 @@
#!/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.
# Load common constants. This should be the first executable line.
# The path to common.sh should be relative to your script's location.
. "$(dirname "$0")/common.sh"
IMAGES_DIR="${DEFAULT_BUILD_ROOT}/images"
# Flags
DEFINE_string from "" "Directory containing rootfs.image and mbr.image"
DEFINE_string to "" "Destination file for USB image."
DEFINE_integer offset 0 "Offset to write the kernel to in the destination."
# Parse command line
FLAGS "$@" || exit 1
eval set -- "${FLAGS_ARGV}"
# Die on any errors.
set -e
if [ -z "${FLAGS_from}" -o -z "${FLAGS_to}" -o -z "${FLAGS_offset}" ]
then
echo "You must define all of from, to and offset."
exit 1
fi
# Convert args to paths. Need eval to un-quote the string so that shell
# chars like ~ are processed; just doing FOO=`readlink -f $FOO` won't work.
FLAGS_from=`eval readlink -f ${FLAGS_from}`
FLAGS_to=`eval readlink -f ${FLAGS_to}`
function do_cleanup {
sync
sudo umount -l /tmp/kernel_fetch.$$
rmdir /tmp/kernel_fetch.$$
}
trap do_cleanup EXIT
#
# Set up loop device. This time it is used to fetch the built kernel from the
# root image. This kernel is then written to the fourth partition.
#
echo "Fetching kernel from root image..."
mkdir /tmp/kernel_fetch.$$
sudo mount -o loop "${FLAGS_from}/rootfs.image" /tmp/kernel_fetch.$$
echo "Writing kernel to ${FLAGS_to} at ${FLAGS_offset}..."
sudo "${SCRIPTS_DIR}"/file_copy.py \
if=/tmp/kernel_fetch.$$/boot/vmlinux.uimg \
of="${FLAGS_to}" \
seek_bytes="${FLAGS_offset}"
echo "Done."
do_cleanup
trap - EXIT