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# Maintainer: Leonardo Arena <rnalrd@alpinelinux.org>
# Maintainer: <bpiotrowski@alpinelinux.org>

_flavor=virt-grsec
pkgname=linux-${_flavor}
pkgver=3.14.6
case $pkgver in
*.*.*)	_kernver=${pkgver%.*};;
*.*)	_kernver=${pkgver};;
esac
pkgrel=0
pkgdesc="Linux kernel for virtual guests with grsecurity"
url="http://grsecurity.net"
depends="mkinitfs linux-firmware"
makedepends="perl sed installkernel bash gmp-dev bc"
options="!strip"
_config=${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-$pkgver.xz
	grsecurity-3.0-$pkgver-201406101411.patch
	fix-memory-map-for-PIE-applications.patch
	imx6q-no-unclocked-sleep.patch
	ping_init_sock.patch

	kernelconfig.x86
	kernelconfig.x86_64
	"
subpackages="$pkgname-dev"
arch="x86 x86_64"
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 "$pkgdir"/lib/modules
	make -j1 modules_install firmware_install install \
		INSTALL_MOD_PATH="$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
068b814830b45c232340db534bc06e04  patch-3.14.6.xz
b4bca0946e46ae371b8456f96bb8f979  grsecurity-3.0-3.14.6-201406101411.patch
c6a4ae7e8ca6159e1631545515805216  fix-memory-map-for-PIE-applications.patch
1a307fc1d63231bf01d22493a4f14378  imx6q-no-unclocked-sleep.patch
a09e75ec5f3cd0b5e6909364aa0fb0b0  ping_init_sock.patch
74884a16fa9c58e0cabfaf57c8b64678  kernelconfig.x86
ef60383e07d9e7df6c474a03f3f56782  kernelconfig.x86_64"
sha256sums="61558aa490855f42b6340d1a1596be47454909629327c49a5e4e10268065dffa  linux-3.14.tar.xz
b8de86f64a62ec1f5d62ef7b0caf302546be0d397e7c7d29e4b1e260220462d7  patch-3.14.6.xz
abefdcbacb2c78c0de1168915dc26d16e35ec0e6158e0bbbc84fad819b234404  grsecurity-3.0-3.14.6-201406101411.patch
500f3577310be52e87b9fecdc2e9c4ca43210fd97d69089f9005d484563f74c7  fix-memory-map-for-PIE-applications.patch
21179fbb22a5b74af0a609350ae1a170e232908572b201d02e791d2ce0a685d3  imx6q-no-unclocked-sleep.patch
d3f5a8d24d44d0268c68b0bf0705d046758c445bf0efb9c0022bec113a1f4f71  ping_init_sock.patch
0afbfb07b8c1eaf741593da97ad15ab34196afe541a82efc66cb8648c36c6c68  kernelconfig.x86
92aa8a3f494732762deec3adfe34b0578bf86310c45eafb678c3c518e6ef578f  kernelconfig.x86_64"
sha512sums="5730d83a7a81134c1e77c0bf89e42dee4f8251ad56c1ac2be20c59e26fdfaa7bea55f277e7af156b637f22e1584914a46089af85039177cb43485089c74ac26e  linux-3.14.tar.xz
ba8784eb4968b639704e225cbd0455768a3d381ade19d37e0cc06cc00606cc9706163b27441f32b1de4a6f71d44b14004e931ea3f9a2d86c20e35dc881e6d451  patch-3.14.6.xz
ff19d88212682a8a2d3b244313fd54a37728de477038ebac3e118de7a61c122283f44d5bd700f440e3edd597a9f5f1dbd5bb58b57fe8631357b9ce1ceacbb681  grsecurity-3.0-3.14.6-201406101411.patch
4665c56ae1bbac311f9205d64918e84ee8b01d47d6e2396ff6b8adfb10aada7f7254531ce62e31edbb65c2a54a830f09ad05d314dfcd75d6272f4068945ad7c7  fix-memory-map-for-PIE-applications.patch
87d1ad59732f265a5b0db54490dc1762c14ea4b868e7eb1aedc3ce57b48046de7bbc08cf5cfcf6f1380fa84063b0edb16ba3d5e3c5670be9bbb229275c88b221  imx6q-no-unclocked-sleep.patch
0d607c6ddbc741933d84777d216794c8eeffa6614b1fe0a1f1e0d15dbab84d53ffbbf4ca92af175db3b8e1e1d50142785372d8ed0df3cd127e70190b6298a6aa  ping_init_sock.patch
324513d75def9fb78ccc5f446e1fae28e7069e94c1ebac406776750cd05f1bf6f0f8a9216543ee6bf82a68d9834e2a1404093d92cc2acd2cb28e3f9a478ad0c6  kernelconfig.x86
b75e13eb31d7a22cb0216e5e04130f58a428932dde6233e0d430071ab4dcc620d5f05e20c6ff2be01a6ec465e7f5136644443e366f6f38029b64650218d0a595  kernelconfig.x86_64"