# Maintainer: Natanael Copa <ncopa@alpinelinux.org>

_flavor=grsec
pkgname=linux-${_flavor}
pkgver=3.14.22
case $pkgver in
*.*.*)	_kernver=${pkgver%.*};;
*.*)	_kernver=${pkgver};;
esac
pkgrel=1
pkgdesc="Linux kernel with grsecurity"
url=http://grsecurity.net
depends="mkinitfs linux-firmware"
makedepends="perl sed installkernel bash gmp-dev bc"
options="!strip"
_config=${config:-kernelconfig.${CARCH}}
install=
source="http://ftp.kernel.org/pub/linux/kernel/v3.x/linux-$_kernver.tar.xz
	http://ftp.kernel.org/pub/linux/kernel/v3.x/patch-$pkgver.xz
	grsecurity-3.0-3.14.22-201410192047.patch

	fix-memory-map-for-PIE-applications.patch
	imx6q-no-unclocked-sleep.patch

	kernelconfig.x86
	kernelconfig.x86_64
	kernelconfig.armhf
	"
subpackages="$pkgname-dev"
arch="x86 x86_64 armhf"
license="GPL-2"

_abi_release=${pkgver}-${pkgrel}-${_flavor}

prepare() {
	local _patch_failed=
	cd "$srcdir"/linux-$_kernver
	if [ "${pkgver%.0}" = "$pkgver" ]; then
		msg "Applying patch-$pkgver.xz"
		unxz -c < "$srcdir"/patch-$pkgver.xz | patch -p1 -N || return 1
	fi

	# first apply patches in specified order
	for i in $source; do
		case $i in
		*.patch)
			msg "Applying $i..."
			if ! patch -s -p1 -N -i "$srcdir"/$i; then
				echo $i >>failed
				_patch_failed=1
			fi
			;;
		esac
	done

	if ! [ -z "$_patch_failed" ]; then
		error "The following patches failed:"
		cat failed
		return 1
	fi

	rm -f localversion*
	echo "-$pkgrel-$_flavor" > localversion-alpine

	mkdir -p "$srcdir"/build
	cp "$srcdir"/$_config "$srcdir"/build/.config || return 1
	make -C "$srcdir"/linux-$_kernver O="$srcdir"/build HOSTCC="${CC:-gcc}" \
		silentoldconfig
}

# this is so we can do: 'abuild menuconfig' to reconfigure kernel
menuconfig() {
	cd "$srcdir"/build || return 1
	make menuconfig
	cp .config "$startdir"/$_config
}

build() {
	cd "$srcdir"/build
	export GCC_SPECS=hardenednopie.specs
	make CC="${CC:-gcc}" \
		KBUILD_BUILD_VERSION="$((pkgrel + 1 ))-Alpine" \
		|| return 1
}

package() {
	cd "$srcdir"/build

	mkdir -p "$pkgdir"/boot "$pkgdir"/lib/modules

	local _install
	case "$CARCH" in
	arm*)
		local _dtbdir="$pkgdir"/usr/lib/linux-${_abi_release}
		mkdir -p "$_dtbdir"
		for i in arch/arm/boot/dts/*.dtb ; do
			install -m644 "$i" "$_dtbdir"
		done

		_install=zinstall
		;;
	*)
		_install=install
		;;
	esac

	make -j1 modules_install firmware_install $_install \
		INSTALL_MOD_PATH="$pkgdir" \
		INSTALL_PATH="$pkgdir"/boot \
		|| return 1

	rm -f "$pkgdir"/lib/modules/${_abi_release}/build \
		"$pkgdir"/lib/modules/${_abi_release}/source
	rm -rf "$pkgdir"/lib/firmware

	install -D include/config/kernel.release \
		"$pkgdir"/usr/share/kernel/$_flavor/kernel.release
}

dev() {
	# copy the only the parts that we really need for build 3rd party
	# kernel modules and install those as /usr/src/linux-headers,
	# simlar to what ubuntu does
	#
	# this way you dont need to install the 300-400 kernel sources to
	# build a tiny kernel module
	#
	pkgdesc="Headers and script for third party modules for grsec kernel"
	depends="gmp-dev bash"
	local dir="$subpkgdir"/usr/src/linux-headers-${_abi_release}

	# first we import config, run prepare to set up for building
	# external modules, and create the scripts
	mkdir -p "$dir"
	cp "$srcdir"/$_config "$dir"/.config
	make -j1 -C "$srcdir"/linux-$_kernver O="$dir" HOSTCC="${CC:-gcc}" \
		silentoldconfig prepare modules_prepare scripts

	# remove the stuff that poits to real sources. we want 3rd party
	# modules to believe this is the soruces
	rm "$dir"/Makefile "$dir"/source

	# copy the needed stuff from real sources
	#
	# this is taken from ubuntu kernel build script
	# http://kernel.ubuntu.com/git?p=ubuntu/ubuntu-jaunty.git;a=blob;f=debian/rules.d/3-binary-indep.mk;hb=HEAD
	cd "$srcdir"/linux-$_kernver
	find . -path './include/*' -prune -o -path './scripts/*' -prune \
		-o -type f \( -name 'Makefile*' -o -name 'Kconfig*' \
		-o -name 'Kbuild*' -o -name '*.sh' -o -name '*.pl' \
		-o -name '*.lds' \) | cpio -pdm "$dir"
	cp -a drivers/media/dvb/dvb-core/*.h "$dir"/drivers/media/dvb/dvb-core
	cp -a drivers/media/video/*.h "$dir"/drivers/media/video
	cp -a drivers/media/dvb/frontends/*.h "$dir"/drivers/media/dvb/frontends
	cp -a scripts include "$dir"
	find $(find arch -name include -type d -print) -type f \
		| cpio -pdm "$dir"

	install -Dm644 "$srcdir"/build/Module.symvers \
		"$dir"/Module.symvers

	mkdir -p "$subpkgdir"/lib/modules/${_abi_release}
	ln -sf /usr/src/linux-headers-${_abi_release} \
		"$subpkgdir"/lib/modules/${_abi_release}/build
}

md5sums="b621207b3f6ecbb67db18b13258f8ea8  linux-3.14.tar.xz
6634fc5051468ef7ff96187edc108825  patch-3.14.22.xz
2a930c98841c849c7517828395d2583f  grsecurity-3.0-3.14.22-201410192047.patch
c6a4ae7e8ca6159e1631545515805216  fix-memory-map-for-PIE-applications.patch
1a307fc1d63231bf01d22493a4f14378  imx6q-no-unclocked-sleep.patch
07e8172daf226e3c622480691667f3e6  kernelconfig.x86
176e9031111396ca78fed6eb9b7a15d2  kernelconfig.x86_64
06aec787b9b0279a6b603b0d3655c38b  kernelconfig.armhf"
sha256sums="61558aa490855f42b6340d1a1596be47454909629327c49a5e4e10268065dffa  linux-3.14.tar.xz
459d9a5d38d496a6448c896e39c342c71fee29c49da38192104d3acc4f0cdd43  patch-3.14.22.xz
816f9fee2e551b16a20aff3123325194299c03f8a397539fa72d2654016bd538  grsecurity-3.0-3.14.22-201410192047.patch
500f3577310be52e87b9fecdc2e9c4ca43210fd97d69089f9005d484563f74c7  fix-memory-map-for-PIE-applications.patch
21179fbb22a5b74af0a609350ae1a170e232908572b201d02e791d2ce0a685d3  imx6q-no-unclocked-sleep.patch
6f51733fd8ac3f1e95987fb08f86d13c5b2ccd953da81bfd64254a41e46c9d6d  kernelconfig.x86
bc63b0d2c6ec4a82b172dc3a7925debaeb78c5dce330b686b235bc811fa1503d  kernelconfig.x86_64
f7fddd997aeec29d1105bbc099b4c8b27f7a872379618a5df592697d6e1a281c  kernelconfig.armhf"
sha512sums="5730d83a7a81134c1e77c0bf89e42dee4f8251ad56c1ac2be20c59e26fdfaa7bea55f277e7af156b637f22e1584914a46089af85039177cb43485089c74ac26e  linux-3.14.tar.xz
ccd02031badafe9c981cfc65d10eee674f76cd8bbcfd8d9765ec057b87dcb7d56583fb2b75eb0a6d14fa7aa028e15061aa79fe1618b40fb79dae6c0479e9202b  patch-3.14.22.xz
8a673850de30772dedd1323fdaab02e3c0ad15669c9330c1b64b485b6b2153e651915e221f9a8f7d96098540b4aa95a15fd65a0e9a1e7c7b29a49c927e4dd448  grsecurity-3.0-3.14.22-201410192047.patch
4665c56ae1bbac311f9205d64918e84ee8b01d47d6e2396ff6b8adfb10aada7f7254531ce62e31edbb65c2a54a830f09ad05d314dfcd75d6272f4068945ad7c7  fix-memory-map-for-PIE-applications.patch
87d1ad59732f265a5b0db54490dc1762c14ea4b868e7eb1aedc3ce57b48046de7bbc08cf5cfcf6f1380fa84063b0edb16ba3d5e3c5670be9bbb229275c88b221  imx6q-no-unclocked-sleep.patch
ab12414092f5081007f9a2793baf6adb268e8aa86f706fc1b4b640a64894b71d8f439ecd5d284ad6569518ab30d3646e4751ac16b8e0c4bbb27a80d4e2408ddb  kernelconfig.x86
9e3a963b2e4703527c41656797e4dca439839f5a663280e023238648b500a94987a780ec6e7592382a2860ace6380ddf00be1f00804c7523750d5ba3bb500d0d  kernelconfig.x86_64
bee0ca939124446da61082fd1dfc3734636eee230497c7f984d8459507ba35e01fb21a263f459f990337f637b091c5d1738a8772878c0d364f9c9d3188d08379  kernelconfig.armhf"