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

_flavor=vanilla
pkgname=linux-${_flavor}
pkgver=3.14.34
case $pkgver in
	*.*.*)	_kernver=${pkgver%.*};;
	*.*) _kernver=$pkgver;;
esac
pkgrel=0
pkgdesc="Linux vanilla kernel"
url=http://grsecurity.net
depends="mkinitfs linux-firmware"
makedepends="perl sed installkernel bash gmp-dev bc"
options="!strip"
_config=${config:-kernelconfig.${CARCH}}
install=
source="http://ftp.kernel.org/pub/linux/kernel/v3.x/linux-$_kernver.tar.xz
	fs-binfmt_elf-fix-memory-map-for-PIE-applications.patch

	kernelconfig.armhf
	kernelconfig.x86
	kernelconfig.x86_64
	"
if [ "${pkgver%.0}" = "$pkgver" ]; then
	source="$source
	http://ftp.kernel.org/pub/linux/kernel/v3.x/patch-$pkgver.xz"
fi
subpackages="$pkgname-dev"
arch="all"
license="GPL-2"

_abi_release=${pkgver}

prepare() {
	local _patch_failed=
	cd "$srcdir"/linux-$_kernver
	if [ "$_kernver" != "$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

	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"
	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
59d1fabcccea6a8a3fcf59d610205a6e  fs-binfmt_elf-fix-memory-map-for-PIE-applications.patch
1774c140d4aeae98000e9c58aede9c9a  kernelconfig.armhf
c22857afdcf3eb7c3169ab7bded0ab4f  kernelconfig.x86
2f633fcea7c4b8f46c6c0bbf5d131ee2  kernelconfig.x86_64
757fae0b451af69f63a185c72d889de8  patch-3.14.34.xz"
sha256sums="61558aa490855f42b6340d1a1596be47454909629327c49a5e4e10268065dffa  linux-3.14.tar.xz
e1377ef692929a37f1e638038b10e06a98502f28efc461e1948dcd67df1e7619  fs-binfmt_elf-fix-memory-map-for-PIE-applications.patch
9463a34d234b53937764bc34e4059ca9ceda86b37a3c3e64de484e677128f6cd  kernelconfig.armhf
f7e7ee5a86b8b3dcf13338fd711054fb5d562e6535532c6e82a1536f7eae3da0  kernelconfig.x86
6729d883cdd23f4616858d9ef6ea9d555538fe62acda92322e45c2a220c90748  kernelconfig.x86_64
efa49c5fcce135b5bf098f628f9b83c2a03ce62c95dfbea047977aa7a9ebd0ca  patch-3.14.34.xz"
sha512sums="5730d83a7a81134c1e77c0bf89e42dee4f8251ad56c1ac2be20c59e26fdfaa7bea55f277e7af156b637f22e1584914a46089af85039177cb43485089c74ac26e  linux-3.14.tar.xz
e8b5a96ddcf55ac9df7de506728a5308f9156086410edf6d354d7c69f6fb450222b25eb062e397889eeb9e5653c3f5110b0603003cca5d6706171b5559ddcd97  fs-binfmt_elf-fix-memory-map-for-PIE-applications.patch
ad6ab96880442393c21edd73f3405c78f62330b6f59a371e1bc667d3cbd041f831d731009e68be88e58656b0714b8d54ffb9220700575c2c330d23b2509947ff  kernelconfig.armhf
bcf75812bc13365c7ea5236cb82101acb359c1aa2854768b1d0981de18337cc9877ab048001e6ff4d3108ac686bfab663c850200b18c58af136bcc4cd441118c  kernelconfig.x86
d438cc2217816e31571abf34e067ec06d9560d70010844fa211c664155c0b4e1a538dd700472403f5582f8ea0e787ce962578242b71629fba9ea647aba72ec32  kernelconfig.x86_64
60d8be620dc46b1bc53889621eb67d2442ac1437019ae49db875711e304303e78938686c405a127b0657a9017038fada7531f3b4a55a11f379b2f79c74b78c51  patch-3.14.34.xz"