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

_mainflavor=grsec
pkgname=linux-$_mainflavor
pkgver=4.1.15
case $pkgver in
*.*.*)	_kernver=${pkgver%.*};;
*.*)	_kernver=${pkgver};;
esac
pkgrel=4
pkgdesc="Linux kernel with grsecurity"
url=http://grsecurity.net
depends="mkinitfs"
makedepends="perl sed installkernel bash gmp-dev bc linux-headers mpfr-dev
	mpc1-dev"
options="!strip"
install=
source="http://ftp.kernel.org/pub/linux/kernel/v4.x/linux-$_kernver.tar.xz
	http://ftp.kernel.org/pub/linux/kernel/v4.x/patch-$pkgver.xz
	http://dev.alpinelinux.org/~tteras/grsec/pax-linux-4.1.15-test24-alpine.patch
	http://dev.alpinelinux.org/~tteras/grsec/grsec-4.1.15-3.1-201509112213-alpine.patch

	fix-spi-nor-namespace-clash.patch
	imx6q-no-unclocked-sleep.patch
	add-checks-for-allocation-failure-isdn_ppp_open.patch
	validate-vj-compression-slot-parameters-completely.patch
	kvm-svm-unconditionally-intercept-#db.patch
	vivid-osd-fix-info-leak-in-ioctl.patch
	staging-dgnc-fix-info-leak-in-ioctl.patch
	net-add-validation-socket-syscall-protocol-argument.patch
	pptp-verify-sockaddr_len.patch
	ovl-fix-permission-checking-for-setattr.patch
	0001-ovl-fix-getcwd-failure-after-unsuccessful-rmdir.patch
	keys-fix-race-between-destruction-and-finding-keyring-by-name.patch
	keys-fixes.patch

	config-grsec.x86
	config-grsec.x86_64
	config-grsec.armhf

	config-virtgrsec.x86
	config-virtgrsec.x86_64
	"
subpackages="$pkgname-dev"
_flavors=
for _i in $source; do
	case $_i in
	config-*.$CARCH)
		_f=${_i%.$CARCH}
		_f=${_f#config-}
		_flavors="$_flavors ${_f}"
		if [ "linux-$_f" != "$pkgname" ]; then
			subpackages="$subpackages linux-${_f}"
		fi
		;;
	esac
done

arch="x86 x86_64 armhf"
license="GPL2"

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

	# remove localversion from patch if any
	rm -f localversion*

	for i in $_flavors; do
		local _config=config-$i.${CARCH}
		local _builddir="$srcdir"/build-$i
		mkdir -p "$_builddir"
		echo "-$pkgrel-$i" > "$srcdir"/build-$i/localversion-alpine \
			|| return 1

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

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

_package() {
	local _buildflavor="$1" _outdir="$2"
	local _abi_release=${pkgver}-${pkgrel}-${_buildflavor}

	cd "$srcdir"/build-$_buildflavor || return 1

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

	local _install
	case "$CARCH" in
	arm*)
		local _dtbdir="$_outdir"/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 $_install \
		INSTALL_MOD_PATH="$_outdir" \
		INSTALL_PATH="$_outdir"/boot \
		|| return 1

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

	install -D include/config/kernel.release \
		"$_outdir"/usr/share/kernel/$_buildflavor/kernel.release
}

# main flavor installs in $pkgdir
package() {
	depends="$depends linux-firmware"
	_package grsec "$pkgdir"
}

# subflavors install in $subpkgdir
virtgrsec() {
	_package virtgrsec "$subpkgdir"
}

# we only provide -dev for main flavor for now
dev() {
	local _abi_release=${pkgver}-${pkgrel}-$_mainflavor
	# copy the only the parts that we really need for build 3rd party
	# kernel modules and install those as /usr/src/linux-headers,
	# simlar to what ubuntu does
	#
	# this way you dont need to install the 300-400 kernel sources to
	# build a tiny kernel module
	#
	pkgdesc="Headers and script for third party modules for grsec kernel"
	depends="gmp-dev bash"
	local dir="$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-grsec.${CARCH} "$dir"/.config
	echo "-$pkgrel-grsec" > "$dir"/localversion-alpine \
		|| return 1
	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 "$srcdir"/build-$_mainflavor/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
}

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5ec05841161a172f8ae1a7f38bb382b0  patch-4.1.15.xz
d23ac8110941baf0f37f9e3a011e3720  pax-linux-4.1.15-test24-alpine.patch
ba5670790e9ee117227024cb4b187756  grsec-4.1.15-3.1-201509112213-alpine.patch
b0337a2a9abed17c37eae5db332522d2  fix-spi-nor-namespace-clash.patch
1a307fc1d63231bf01d22493a4f14378  imx6q-no-unclocked-sleep.patch
4bf3d4e28a3318ea7251f862aa35dc95  add-checks-for-allocation-failure-isdn_ppp_open.patch
9b150b8017a25fb6c9e9e29b1f1e791f  validate-vj-compression-slot-parameters-completely.patch
c02b7d642341d3b82cff47d801813254  kvm-svm-unconditionally-intercept-#db.patch
b52be7e646d3572687e4d26d4291233e  vivid-osd-fix-info-leak-in-ioctl.patch
6c48221dbad6928f2b9f6c1f521c5844  staging-dgnc-fix-info-leak-in-ioctl.patch
730439fc2751795dc00f1fb3ec810b12  net-add-validation-socket-syscall-protocol-argument.patch
e4590e034252bb838220d2bedc19be2e  pptp-verify-sockaddr_len.patch
5f27a173424a42db509b46372c200e85  ovl-fix-permission-checking-for-setattr.patch
0ac0bfd35d8d857b790f3cf55028d967  0001-ovl-fix-getcwd-failure-after-unsuccessful-rmdir.patch
0526ef5b0cb5c8b697ab8fcd337d303e  keys-fix-race-between-destruction-and-finding-keyring-by-name.patch
370b4498d0dc52eb8a85a23a5973bebf  keys-fixes.patch
8592323596689e3ef967ff96d1190d1b  config-grsec.x86
81aab21a18c16cf96d0fa719564281ec  config-grsec.x86_64
c4c15b3ba79bb557a67cd9356b56d7c4  config-grsec.armhf
28754e558f94f3b3e0b0fcc27c1c955f  config-virtgrsec.x86
ae802ba9bdf0dfa50e7506a08bbf929d  config-virtgrsec.x86_64"
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5cb29b9a0ffb72c11ff17a0c68a9bb6452ca15b79eb1fc00c179cdf1748f2d48  pax-linux-4.1.15-test24-alpine.patch
a92b81dbd4fa4fbee28cebad93b0bd623820c809e98e8841151842341b9626eb  grsec-4.1.15-3.1-201509112213-alpine.patch
01279cfb93273d99670c56e2465957ecde3d03693beeb929a743f03afa0b7bdc  fix-spi-nor-namespace-clash.patch
21179fbb22a5b74af0a609350ae1a170e232908572b201d02e791d2ce0a685d3  imx6q-no-unclocked-sleep.patch
78ca4ba9863d43ba498db628f2dfc2cf00427236745636025bd24513bdf05189  add-checks-for-allocation-failure-isdn_ppp_open.patch
d2670dc40c47de365d36ba1e1bbef0ea3e6381f5d4c38e88a4c5db2eb4383925  validate-vj-compression-slot-parameters-completely.patch
eb787ea2e4637708475569f7498c1ef0fa5e4e80ae22df5c5f44092615f86ebd  kvm-svm-unconditionally-intercept-#db.patch
4070f46003fb5e1a16474f682da78d989809272a7aa209f794caa8d0b941e2c0  vivid-osd-fix-info-leak-in-ioctl.patch
144886917b2c5ff880c4beb11ca8743b98ea5ed49bbd10a54a98e1d76cfe23b5  staging-dgnc-fix-info-leak-in-ioctl.patch
180af96ce8310913f6662be50ca69c9737af250ef8dd3fdefdc58bef5f55ca9e  net-add-validation-socket-syscall-protocol-argument.patch
5d3f0311176addb6cbbe0739736962cdb3826816e5cc0384f52d34cbd7c2c2a0  pptp-verify-sockaddr_len.patch
79fa593d628d740c7bc2b68398ab381ad978293102d1f282919ee69aeab6a17d  ovl-fix-permission-checking-for-setattr.patch
464fbfe582c2b841c629c78508d117108505aafdcc6fec8a2ae0b34193d04bbe  0001-ovl-fix-getcwd-failure-after-unsuccessful-rmdir.patch
c3a7a6d1ca5c23c98ea703c716144dc88b5bcf5052416a7ff3c766beed78d7db  keys-fix-race-between-destruction-and-finding-keyring-by-name.patch
653bdfac4fdac0fed19b60c8ae34afe97a699bbabe0e00888584c1ef52a626e1  keys-fixes.patch
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2611db9cca53ac6851beb9f48e51651090e6b97a644d260671d6f4aa2b2d75ff71276b6d14d0b2e5908bc261c86fc6c2dc4bd88e093fdd74e144983c720f0a2b  keys-fixes.patch
819ff2d16b5c15399de9b3c254d4ed6b7ef580a5b7cdacb209d90d35d178e93e34a5d6159b0edfab4afec9decf404901a7504f7b106c62c3dba0cdb4f0951a61  config-grsec.x86
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caec0c97bfd25c9cc6921addc8b39941284a38746d5b9c5f19c0f1fe679d9f4c6ee7881a2eb95a16dcfbb082486435f467d27d539405ee6094b70d13b3bf2276  config-virtgrsec.x86
3a8dbd0bdf8c1a46b6ced0b70e60bd830f46cb9752af12759b7ba8d8b041c117de1b25496f98653e65aa3828ab8644982f10807bf18ab60afaa778fde7711544  config-virtgrsec.x86_64"