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

_flavor=grsec
pkgname=linux-${_flavor}
pkgver=3.9.5
case $pkgver in
*.*.*)	_kernver=${pkgver%.*};;
*.*)	_kernver=${pkgver};;
esac
pkgrel=1
pkgdesc="Linux kernel with grsecurity"
url=http://grsecurity.net
depends="mkinitfs linux-firmware"
makedepends="perl installkernel bash gmp-dev bc"
options="!strip"
_config=${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-2.9.1-3.9.5-201306111850.patch

	0001-net-inform-NETDEV_CHANGE-callbacks-which-flags-were-.patch
	0002-arp-flush-arp-cache-on-IFF_NOARP-change.patch
	0003-ipv4-properly-refresh-rtable-entries-on-pmtu-redirec.patch
	0004-ipv4-rate-limit-updating-of-next-hop-exceptions-with.patch
	0005-ipv4-use-separate-genid-for-next-hop-exceptions.patch
	0006-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
aa22187ae5cd482a69097e9e59244491  patch-3.9.5.xz
cbc169ce43edf201acb158ce7e468516  grsecurity-2.9.1-3.9.5-201306111850.patch
a16f11b12381efb3bec79b9bfb329836  0001-net-inform-NETDEV_CHANGE-callbacks-which-flags-were-.patch
656ae7b10dd2f18dbfa1011041d08d60  0002-arp-flush-arp-cache-on-IFF_NOARP-change.patch
aa454ffb96428586447775c21449e284  0003-ipv4-properly-refresh-rtable-entries-on-pmtu-redirec.patch
2a12a3717052e878c0cd42aa935bfcf4  0004-ipv4-rate-limit-updating-of-next-hop-exceptions-with.patch
6ce5fed63aad3f1a1ff1b9ba7b741822  0005-ipv4-use-separate-genid-for-next-hop-exceptions.patch
1a5800a2122ba0cc0d06733cb3bb8b8f  0006-ipv4-use-next-hop-exceptions-also-for-input-routes.patch
3e219a1f25136b204d00865939532fe9  kernelconfig.x86
1d057c89927a68e5f44896887ad3e379  kernelconfig.x86_64"
sha256sums="60bc3e64ee5dc778de2cd7cd7640abf518a4c9d4f31b8ed624e16fad53f54541  linux-3.9.tar.xz
f25145ff6ddde7a633839aabfd97b0d8239e14c494fd16210871229a35c1c0de  patch-3.9.5.xz
12ea825b5494c41529d1b3dda89fe592d6b4fc06d027b2e7f2e9a1ae41c3617c  grsecurity-2.9.1-3.9.5-201306111850.patch
6af3757ac36a6cd3cda7b0a71b08143726383b19261294a569ad7f4042c72df3  0001-net-inform-NETDEV_CHANGE-callbacks-which-flags-were-.patch
dc8e82108615657f1fb9d641efd42255a5761c06edde1b00a41ae0d314d548f0  0002-arp-flush-arp-cache-on-IFF_NOARP-change.patch
0985caa0f3ee8ed0959aeaa4214f5f8057ae8e61d50dcae39194912d31e14892  0003-ipv4-properly-refresh-rtable-entries-on-pmtu-redirec.patch
260fd1807838b68305a96992bf7d3302a2a8ef3a3b08fe079ba9a07e6422f736  0004-ipv4-rate-limit-updating-of-next-hop-exceptions-with.patch
ae32bb72afa170e6c3788c564b342763aba5945afacc1e2ebfc096adf50d77a3  0005-ipv4-use-separate-genid-for-next-hop-exceptions.patch
fc613ac466610b866b721c41836fd5bfb2d4b75bceb67972dc6369d7f62ff47e  0006-ipv4-use-next-hop-exceptions-also-for-input-routes.patch
cc3bd3d23f6a73ea6488c158de9d195ad5e3d87859ce02d92a04f0e08c9503d3  kernelconfig.x86
b780ef646b3b30a5b0307102367e17d45bb3a0ab7e37cf92a1ce783c3149243a  kernelconfig.x86_64"
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8e9a064adadd062c7ca52c44de19dfd46b029e60f2832988a606e086b669ea699861ec57732d4abfb16e486f767d123fcfd66da7c2ddde380b7c13582bb44983  patch-3.9.5.xz
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249140374c19a5599876268ff5b3cda2e136681aee103b4a9fff5d7d346f8e3295a907fb43db0701b8a9fece64c299ad2abac0434259cce6631307ce84090205  0006-ipv4-use-next-hop-exceptions-also-for-input-routes.patch
00fd8694455935f96e46b6624388b8c04af27ce4295040362da78c34bf9f08382bc69c1b8b273145573a59e3b4eecfa251119560da19ab390f171a8a6da18298  kernelconfig.x86
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