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

_mainflavor=grsec
pkgname=linux-$_mainflavor
pkgver=4.1.39
case $pkgver in
*.*.*)	_kernver=${pkgver%.*};;
*.*)	_kernver=${pkgver};;
esac
pkgrel=0
pkgdesc="Linux kernel with grsecurity"
url=http://grsecurity.net
depends="mkinitfs"
makedepends="perl sed installkernel bash gmp-dev bc linux-headers mpfr-dev
	mpc1-dev"
options="!strip"
install=
source="https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-$_kernver.tar.xz
	https://cdn.kernel.org/pub/linux/kernel/v4.x/patch-$pkgver.xz
	https://distfiles.alpinelinux.org/distfiles/grsec-4.1.39-3.1-201509201149-alpine.patch

	fix-spi-nor-namespace-clash.patch
	imx6q-no-unclocked-sleep.patch
	keys-fixes.patch
	staging-dgnc-fix-info-leak-in-ioctl.patch
	via-velocity-length-check.patch
	xsa155-linux-xsa155-0001-xen-Add-RING_COPY_REQUEST.patch
	xsa155-linux-xsa155-0002-xen-netback-don-t-use-last-request-to-determine-mini.patch
	xsa155-linux-xsa155-0003-xen-netback-use-RING_COPY_REQUEST-throughout.patch
	xsa155-linux-xsa155-0004-xen-blkback-only-read-request-operation-from-shared-.patch
	xsa155-linux-xsa155-0006-xen-scsiback-safely-copy-requests.patch
	xsa155-linux43-0005-xen-blkback-read-from-indirect-descriptors-only-once.patch
	xsa157-0001-xen-pciback-Return-error-on-XEN_PCI_OP_enable_msi-wh.patch
	xsa157-0003-xen-pciback-Do-not-install-an-IRQ-handler-for-MSI-in.patch
	xsa157-0004-xen-pciback-For-XEN_PCI_OP_disable_msi-x-only-disabl.patch
	CVE-2016-10229.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"

# secfixes:
#   4.1.39-r0:
#   - CVE-2016-10229

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 $source; do
		local file=${i%::*}
		case $file in
		*.patch)
			msg "Applying $file..."
			if ! patch -s -p1 -N -i "$srcdir"/${file##*/}; then
				echo $file >>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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899a9b178d49c145de7df9712aaafefc  patch-4.1.39.xz
82283070e21c043bd2b838080f77863f  grsec-4.1.39-3.1-201509201149-alpine.patch
b0337a2a9abed17c37eae5db332522d2  fix-spi-nor-namespace-clash.patch
1a307fc1d63231bf01d22493a4f14378  imx6q-no-unclocked-sleep.patch
04f93023c13c5cf3d9d5cbdf5c2a3ab3  keys-fixes.patch
6c48221dbad6928f2b9f6c1f521c5844  staging-dgnc-fix-info-leak-in-ioctl.patch
073d3b8947c33abf715a0e505f144a7e  via-velocity-length-check.patch
7139ce0106f489a71474b2196cd70edc  xsa155-linux-xsa155-0001-xen-Add-RING_COPY_REQUEST.patch
484f3e18e22f6b7c06dabaaf5d5ed274  xsa155-linux-xsa155-0002-xen-netback-don-t-use-last-request-to-determine-mini.patch
0bf4e9b42ff4c7feb968ab0e5b4a8be0  xsa155-linux-xsa155-0003-xen-netback-use-RING_COPY_REQUEST-throughout.patch
f57e383a744db7ea6eb64d6a9e6fd5b0  xsa155-linux-xsa155-0004-xen-blkback-only-read-request-operation-from-shared-.patch
6b41c3dbec8f4897bc9014d2a1ed9e66  xsa155-linux-xsa155-0006-xen-scsiback-safely-copy-requests.patch
70ae93ddef7c9832ecde037c81009099  xsa155-linux43-0005-xen-blkback-read-from-indirect-descriptors-only-once.patch
56607a45cf844386189a42ce432f0ce2  xsa157-0001-xen-pciback-Return-error-on-XEN_PCI_OP_enable_msi-wh.patch
0d045adaa831dc6b56c8a2528a96de9b  xsa157-0003-xen-pciback-Do-not-install-an-IRQ-handler-for-MSI-in.patch
a4b81926f3c77b5466de2934f989dabf  xsa157-0004-xen-pciback-For-XEN_PCI_OP_disable_msi-x-only-disabl.patch
8d81969d7c85cfb913e53f6cc83aba82  CVE-2016-10229.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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113346a07ed7aa5dce5dc99852a56c9deaf2c10af7be6853010e8ec645e12cc4  grsec-4.1.39-3.1-201509201149-alpine.patch
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21179fbb22a5b74af0a609350ae1a170e232908572b201d02e791d2ce0a685d3  imx6q-no-unclocked-sleep.patch
246119a70831c0c01aabdbb31f75d0476883cfbc172e2a749655ec569569440f  keys-fixes.patch
144886917b2c5ff880c4beb11ca8743b98ea5ed49bbd10a54a98e1d76cfe23b5  staging-dgnc-fix-info-leak-in-ioctl.patch
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fbc303521afbecbe2dccbe9955d108af53aaaa3388f2ca0962fc93f26a535a56  config-grsec.x86
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