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# Copyright 1999-2021 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
}
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