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

_flavor=grsec
pkgname=linux-${_flavor}
pkgver=3.9.3
case $pkgver in
*.*.*)	_kernver=${pkgver%.*};;
*.*)	_kernver=${pkgver};;
esac
pkgrel=2
pkgdesc="Linux kernel with grsecurity"
url=http://grsecurity.net
depends="mkinitfs linux-firmware"
makedepends="perl installkernel bash gmp-dev bc"
options="!strip"
_config=${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-2.9.1-3.9.3-201305201732.patch

	v2-net-next-arp-flush-arp-cache-on-IFF_NOARP-change.patch
	leds-leds-gpio-reserve-gpio-before-using-it.patch
	ipsec-xfrm-properly-handle-invalid-states-as-an-error.patch
	RFC-net-ipv4-Use-next-hop-exceptions-also-for-input-routes.patch

	kernelconfig.x86
	kernelconfig.x86_64
	"
subpackages="$pkgname-dev"
arch="x86 x86_64 arm"
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

	echo "-$pkgrel" > 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 "$srcdir"/build
	export GCC_SPECS=/usr/share/gcc/hardenednopie.specs
	make CC="${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="4348c9b6b2eb3144d601e87c19d5d909  linux-3.9.tar.xz
71b31e29e0cb437a27017c781293b6f4  patch-3.9.3.xz
e881cf0db639205660f237ceea58f708  grsecurity-2.9.1-3.9.3-201305201732.patch
699e92148cc9a55b6fc4d7d81e476717  v2-net-next-arp-flush-arp-cache-on-IFF_NOARP-change.patch
83db7136608d8101ae130728539dc376  leds-leds-gpio-reserve-gpio-before-using-it.patch
ac9a50bdbe91ba6e5205e83f7e734ff5  ipsec-xfrm-properly-handle-invalid-states-as-an-error.patch
12d3647755bebcd3b114f50de2729455  RFC-net-ipv4-Use-next-hop-exceptions-also-for-input-routes.patch
fd6fd35309c0e8c1f05cb725df958f22  kernelconfig.x86
fd61ff58d25155997c0d6f73e7ca7a7d  kernelconfig.x86_64"
sha256sums="60bc3e64ee5dc778de2cd7cd7640abf518a4c9d4f31b8ed624e16fad53f54541  linux-3.9.tar.xz
248ab5f9a42b72e5c3d961520a5fff609a625bbf570ad45d7ae97009525b94d7  patch-3.9.3.xz
c1b4310085ff07200131dc841a0a22f84a7f166c3b25464e27dd2694584bc72c  grsecurity-2.9.1-3.9.3-201305201732.patch
8e2f41605937eecd47cefe62daefd372dbf1e63cf956ab3ced3213ac2b508ee3  v2-net-next-arp-flush-arp-cache-on-IFF_NOARP-change.patch
13676bc5610a8d03e788ac76734babd1338b023bb39559452ee54652b046e6f4  leds-leds-gpio-reserve-gpio-before-using-it.patch
ab0dcb52342990ad05af5ce21acd1e95fb65cc7e76ec98e45c7ece7433bc9f23  ipsec-xfrm-properly-handle-invalid-states-as-an-error.patch
667babfafe4dc3449cd04853f532712188af557cbac41c461cf8236c4238f5a3  RFC-net-ipv4-Use-next-hop-exceptions-also-for-input-routes.patch
b44c6671b344ddae1da94e6c051a0e708af8609c1f2ff40d962301ed5023c83a  kernelconfig.x86
7a6700a6db89f8c2c7f8cce7d77f4ddb3fcad889d72c709c2833af795ef1bc79  kernelconfig.x86_64"
sha512sums="77fa521f42380409f8ab400c26f7b00e225cb075ef40834bb263325cfdcc3e65aef8511ec2fc2b50bbf4f50e226fb5ab07d7a479aaf09162adbbf318325d0790  linux-3.9.tar.xz
ae2bca3f0d274281d7ae88bb835d129a036350dfd3e9e941d7a0175194b2cbccffb5f8b5a20e5a7498cb5a097c6376d8cb1032ea048051b08ec0dd05309c09eb  patch-3.9.3.xz
d6aa751d1fac8c4d758f9479bc6b08f70d8725c6c74b63446def044f42260a8beb1f540ae4473ec57f42538513d3ccb42de41c8cc721b9b85d8cfbaef7ab85d5  grsecurity-2.9.1-3.9.3-201305201732.patch
772c847cd74b12ed22266042c0902d8a3cf09c897b6e1c01148dfcd2f01aed331f292e82c34bb718090dc0898e1ef364196272bff885a32378f7fbc8bfc06a9b  v2-net-next-arp-flush-arp-cache-on-IFF_NOARP-change.patch
10d2cf4fb308d1bc8cb5b9df3f9a6d7b9cef453244673bcbe66bd9b64af410a498e203d4dfa51f53461362ad981736eadc46537616b2c0514f57f4d8864c830d  leds-leds-gpio-reserve-gpio-before-using-it.patch
769291e92f2f5ae5375d98b80bf8790b089c87437f1660cf8d5e9d45d7221280b6824bcb1d2564cbe12310a88df48443c56ecc9ce5468858829088221aa80327  ipsec-xfrm-properly-handle-invalid-states-as-an-error.patch
d35c939967d5696e477e2c5181f96e9cb92e1db88477576615f36209d276e0a2a866111d43e4abe076c455e32b063d6a97d42e5bc9ca04702d78b13826bf3afb  RFC-net-ipv4-Use-next-hop-exceptions-also-for-input-routes.patch
2516c47145f53cfa5624a9a8839b3590fd16a980aa4c8c48af4db025960d33abe855a5c698ee701a0d3704a96a9a3f93cd6c3cc8c9b8fdf73f230c15ad2f7611  kernelconfig.x86
0a3739e5e1fe29fcce8c686d8ac223316467a2efaaa18cb3d1abf6c7a66dc86be12c26755dff1aef6d0f5a028ce4f6dfc5664ab42b484046949f401f3b9198f9  kernelconfig.x86_64"