kerndev-install

#!/bin/bash
set -e; set -o pipefail; source kerndev-shared.sh

# If argument provided it specifies a cross-compile target architecture.
target_arch=${1:-$(uname -m)}
rootfs=rootfs.img

case $target_arch in
arm)
	# Use aarch64 + backwards compatibility.
	;&
aarch64)
	linux_arch="arm64"
	cross_compile_prefix="aarch64-linux-gnu-"
	;;
x86_64)
	kernel_image_path=$LINUX_DEV_PATH/arch/x86/boot/bzImage

	check_linux_dev_path
	[[ ! -f $kernel_image_path ]] && \
		fatal "can't find kernel image at $kernel_image_path"
	;;
*)
	fatal "unknown architecture: $target_arch"
	;;
esac

if [[ "$target_arch" != "$(uname -m)" ]]; then
	rootfs=rootfs_${target_arch}.img
	make_opts="ARCH=${linux_arch} CROSS_COMPILE=$cross_compile_prefix"
fi

# Sanity checks.

rootfs_image_path=$KERNDEV_PATH/$rootfs
[[ ! -f $rootfs_image_path ]] && \
	fatal "can't find root fs image at $rootfs_image_path"

elevate $@

push_linux

unmount
mount_image $rootfs
trap unmount EXIT

echo Installing headers and modules...
mak headers_install INSTALL_HDR_PATH=/mnt/usr/
mak modules_install INSTALL_MOD_PATH=/mnt/

if [[ -z "$USE_EXISTING_IMAGE" ]] && [[ -n "$ENABLE_GCOV" ]]; then
	# We need to copy the linux source code to be able to gcov it.
	echo "Copying linux source to image (gcov)..."

	image_linux_dev_path=/mnt/home/$SUDO_USER/linux

	rm -rf $image_linux_dev_path
	mkdir $image_linux_dev_path

	# Create dir structure.
	find . -type d | xargs -i mkdir -p $image_linux_dev_path/{}

	# Adapted from https://www.kernel.org/doc/Documentation/gcov.txt
	# But you need .o files too...? so the docs are wrong? TODO: Investigate...
	find -name '*.gcno' -o -name '*.[choS]' -o -type l | \
	    xargs -i cp -a {} $image_linux_dev_path/{}

	# Executing this outside of the chroot probably means uids need to be
	# synced. TODO: Fix.
	give_back $image_linux_dev_path
fi

pop

say_done