1 files changed, 98 insertions, 0 deletions
diff --git a/app-emulation/grub-xen-host/grub-xen-host-1.0-r1.ebuild b/app-emulation/grub-xen-host/grub-xen-host-1.0-r1.ebuild
new file mode 100644
index 000000000000..9a2c9dc09f07
--- /dev/null
+++ b/app-emulation/grub-xen-host/grub-xen-host-1.0-r1.ebuild
@@ -0,0 +1,98 @@
+# Copyright 2020 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+DESCRIPTION="Grub2 built as a PV grub per the Xen PV Boot Protocol"
+HOMEPAGE="https://blog.xenproject.org/2015/01/07/using-grub-2-as-a-bootloader-for-xen-pv-guests/"
+SRC_URI=""
+
+LICENSE="BSD-2"
+SLOT="0"
+KEYWORDS="~amd64"
+IUSE="pvh"
+
+DEPEND="sys-boot/grub:2=[grub_platforms_xen]
+	pvh? ( >=sys-boot/grub-2.04:2=[grub_platforms_xen-pvh] )
+	app-emulation/xen-tools:="
+RDEPEND="${DEPEND}"
+
+S="${WORKDIR}"
+
+RESTRICT="binchecks strip test"
+
+src_configure() {
+	:
+}
+
+src_compile() {
+	cat > "${S}/grub-bootstrap.cfg" <<- EOF || die
+		normal (memdisk)/grub.cfg
+	EOF
+
+	cat > "${S}/grub.cfg" <<- EOF || die
+		if search -s -f /boot/xen/pvboot-x86_64.elf ; then
+			echo "Chainloading (${root})/boot/xen/pvboot-x86_64.elf"
+			multiboot "/boot/xen/pvboot-x86_64.elf"
+			boot
+		fi
+
+		if search -s -f /xen/pvboot-x86_64.elf ; then
+			echo "Chainloading (${root})/xen/pvboot-x86_64.elf"
+			multiboot "/xen/pvboot-x86_64.elf"
+			boot
+		fi
+
+		if search -s -f /boot/grub/grub.cfg ; then
+			echo "Reading (${root})/boot/grub/grub.cfg"
+			configfile /boot/grub/grub.cfg
+		fi
+
+		if search -s -f /grub/grub.cfg ; then
+			echo "Reading (${root})/grub/grub.cfg"
+			configfile /grub/grub.cfg
+		fi
+	EOF
+
+	tar cf memdisk.tar grub.cfg || die "failed to tar"
+
+	local grub_mkimage=grub-mkimage
+	if type grub2-mkimage &> /dev/null; then
+		grub_mkimage=grub2-mkimage
+	fi
+
+	local args=(
+		"${grub_mkimage}"
+		-O x86_64-xen
+		-c grub-bootstrap.cfg
+		-m memdisk.tar
+		-o grub-x86_64-xen.bin
+		/usr/lib/grub/x86_64-xen/*.mod
+	)
+
+	echo "${args[@]}"
+	"${args[@]}" || die "failed to grub-mkimage"
+
+	if use pvh; then
+		local args=(
+			"${grub_mkimage}"
+			-O i386-xen_pvh
+			-c grub-bootstrap.cfg
+			-m memdisk.tar
+			-o grub-i386-xen_pvh.bin
+			/usr/lib/grub/i386-xen_pvh/*.mod
+		)
+
+		echo "${args[@]}"
+		"${args[@]}" || die "failed to grub-mkimage"
+	fi
+
+}
+
+src_install() {
+	exeinto /usr/libexec/xen/bin
+	doexe grub-x86_64-xen.bin
+	if use pvh; then
+		doexe grub-i386-xen_pvh.bin
+	fi
+}