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Add feature to extract kernel image from other recovery image for use in recovery.

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This CL adds a new option to mod_image_for_recovery that allows a dev to pass
in another recovery image as an option and have mod_image_for_recovery use
the kernel provided in that image when building a new recovery image.

BUG=chromium-os:19189
TEST=Built using option on image signed with non-dev keys using appropriate
recovery image as base.

Change-Id: I02a3c3bf458fb3c9fee556364005d7eaff5acccc
Reviewed-on: http://gerrit.chromium.org/gerrit/6031
Tested-by: Chris Sosa <sosa@chromium.org>
Reviewed-by: Gaurav Shah <gauravsh@chromium.org>
This commit is contained in:
Chris Sosa 2011-08-15 16:29:05 -07:00
parent 4fc9c2706d
commit 493cbf8426
1 changed files with 22 additions and 1 deletions
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23
mod_image_for_recovery.sh
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@ -19,6 +19,8 @@ DEFINE_integer statefulfs_sectors 4096 \
# Skips the build steps and just does the kernel swap.
DEFINE_string kernel_image "" \
"Path to a pre-built recovery kernel"
DEFINE_string recovery_image_with_kernel "" \
"Optional path to a recovery image with a pre-built kernel."
DEFINE_string kernel_outfile "" \
"Filename and path to emit the kernel outfile to. \
If empty, emits to IMAGE_DIR."
@ -281,6 +283,21 @@ install_recovery_kernel() {
return 0
}
# Extracts a kernel from an existing recovery image.
# $1 path to new kernel image.
# $2 path to recovery image.
extract_kernel_image() {
local kernel_path="$1"
local recovery_image="$2"
local kern_a_offset=$(partoffset ${recovery_image} 2)
local kern_a_count=$(partsize ${recovery_image} 2)
info "Extracing kernel image from $2"
dd if="$recovery_image" of="$kernel_path" bs=512 \
skip=$kern_a_offset count=$kern_a_count
}
update_partition_table() {
local src_img=$1 # source image
local temp_state=$2 # stateful partition image
@ -413,7 +430,11 @@ FACTORY_ROOT="${BOARD_ROOT}/factory-root"
USE="fbconsole initramfs" emerge_custom_kernel "$FACTORY_ROOT" ||
failboat "Cannot emerge custom kernel"
if [ -z "$FLAGS_kernel_image" ]; then
if [ -n "FLAGS_recovery_image_with_kernel" ]; then
RECOVERY_KERNEL_IMAGE="$(tempfile -p "extracted_kernel")"
extract_kernel_image "$RECOVERY_KERNEL_IMAGE" \
"$FLAGS_recovery_image_with_kernel"
elif [ -z "$FLAGS_kernel_image" ]; then
create_recovery_kernel_image
echo "Recovery kernel created at $RECOVERY_KERNEL_IMAGE"
else