app-emulation/xen-pvgrub: fix boot certain guest kernel

pvgrub: fix crash when booting kernel with p2m list outside kernel mapping
https://xenbits.xen.org/gitweb/?p=xen.git;a=commit;h=9714f6b87e19b32d3a6663a20df6610265c4bfe5

Gentoo-Bug: 595354

Package-Manager: portage-2.3.1

app-emulation/xen-pvgrub/files/xen-pvgrub-4.7.0-fix-boot-p2m.patch

@@ -0,0 +1,36 @@
+From 9714f6b87e19b32d3a6663a20df6610265c4bfe5 Mon Sep 17 00:00:00 2001
+From: Juergen Gross <[email protected]>
+Date: Wed, 28 Sep 2016 06:02:44 +0200
+Subject: [PATCH] pvgrub: fix crash when booting kernel with p2m list outside
+ kernel mapping
+
+When trying to boot a kernel with the p2m list not mapped by the
+initial kernel mapping it can happen that pvgrub is failing as it is
+keeping some page tables mapped.
+
+Unmap the additional page tables created for the special p2m mapping
+will avoid this failure.
+
+Reported-by: Sven Koehler <[email protected]>
+Signed-off-by: Juergen Gross <[email protected]>
+Acked-by: Wei Liu <[email protected]>
+---
+ stubdom/grub/kexec.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/stubdom/grub/kexec.c b/stubdom/grub/kexec.c
+index 8fd9ff9..71c2f3f 100644
+--- a/stubdom/grub/kexec.c
++++ b/stubdom/grub/kexec.c
+@@ -347,6 +347,8 @@ void kexec(void *kernel, long kernel_size, void *module, long module_size, char
+     /* Unmap libxc's projection of the boot page table */
+     seg = xc_dom_seg_to_ptr(dom, &dom->pgtables_seg);
+     munmap(seg, dom->pgtables_seg.vend - dom->pgtables_seg.vstart);
++    seg = xc_dom_seg_to_ptr(dom, &dom->p2m_seg);
++    munmap(seg, dom->p2m_seg.vend - dom->p2m_seg.vstart);
+
+     /* Unmap day0 pages to avoid having a r/w mapping of the future page table */
+     for (pfn = 0; pfn < allocated; pfn++)
+-- 
+2.10.0
+

app-emulation/xen-pvgrub/xen-pvgrub-4.7.0-r1.ebuild

@@ -0,0 +1,164 @@
+# Copyright 1999-2016 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+EAPI=5
+
+PYTHON_COMPAT=( python2_7 )
+PYTHON_REQ_USE='xml,threads'
+
+inherit flag-o-matic eutils multilib python-single-r1 toolchain-funcs
+
+XEN_EXTFILES_URL="http://xenbits.xensource.com/xen-extfiles"
+LIBPCI_URL=ftp://atrey.karlin.mff.cuni.cz/pub/linux/pci
+GRUB_URL=mirror://gnu-alpha/grub
+
+UPSTREAM_VER=
+[[ -n ${UPSTREAM_VER} ]] && \
+	UPSTREAM_PATCHSET_URI="https://dev.gentoo.org/~dlan/distfiles/${P/-tools/}-upstream-patches-${UPSTREAM_VER}.tar.xz"
+
+SRC_URI="
+		http://bits.xensource.com/oss-xen/release/${PV}/xen-${PV}.tar.gz
+		$GRUB_URL/grub-0.97.tar.gz
+		$XEN_EXTFILES_URL/zlib-1.2.3.tar.gz
+		$LIBPCI_URL/pciutils-2.2.9.tar.bz2
+		$XEN_EXTFILES_URL/lwip-1.3.0.tar.gz
+		$XEN_EXTFILES_URL/newlib/newlib-1.16.0.tar.gz
+		$XEN_EXTFILES_URL/polarssl-1.1.4-gpl.tgz
+		${UPSTREAM_PATCHSET_URI}"
+
+S="${WORKDIR}/xen-${PV}"
+
+DESCRIPTION="allows to boot Xen domU kernels from a menu.lst laying inside guest filesystem"
+HOMEPAGE="http://xen.org/"
+LICENSE="GPL-2"
+SLOT="0"
+KEYWORDS="~amd64 ~x86"
+IUSE="custom-cflags"
+
+REQUIRED_USE="${PYTHON_REQUIRED_USE}"
+
+DEPEND="sys-devel/gettext
+	sys-devel/bin86
+	sys-apps/texinfo
+	x11-libs/pixman"
+
+RDEPEND=">=app-emulation/xen-tools-${PV}"
+
+pkg_setup() {
+	python-single-r1_pkg_setup
+}
+
+retar-externals() {
+	# Purely to unclutter src_prepare
+	local set="grub-0.97.tar.gz lwip-1.3.0.tar.gz newlib-1.16.0.tar.gz polarssl-1.1.4-gpl.tgz zlib-1.2.3.tar.gz"
+
+	# epatch can't patch in $WORKDIR, requires a sed; Bug #455194. Patchable, but sed informative
+	sed -e s':AR=${AR-"ar rc"}:AR=${AR-"ar"}:' \
+		-i "${WORKDIR}"/zlib-1.2.3/configure
+	sed -e 's:^AR=ar rc:AR=ar:' \
+		-e s':$(AR) $@:$(AR) rc $@:' \
+		-i "${WORKDIR}"/zlib-1.2.3/{Makefile,Makefile.in}
+	einfo "zlib Makefile edited"
+
+	cd "${WORKDIR}"
+	tar czp zlib-1.2.3 -f zlib-1.2.3.tar.gz
+	tar czp grub-0.97 -f grub-0.97.tar.gz
+	tar czp lwip -f lwip-1.3.0.tar.gz
+	tar czp newlib-1.16.0 -f newlib-1.16.0.tar.gz
+	tar czp polarssl-1.1.4 -f polarssl-1.1.4-gpl.tgz
+	mv $set "${S}"/stubdom/
+	einfo "tarballs moved to source"
+}
+
+src_prepare() {
+	# Upstream's patchset
+	if [[ -n ${UPSTREAM_VER} ]]; then
+		einfo "Try to apply Xen Upstream patch set"
+		EPATCH_SUFFIX="patch" \
+		EPATCH_FORCE="yes" \
+		EPATCH_OPTS="-p1" \
+			epatch "${WORKDIR}"/patches-upstream
+	fi
+
+	# if the user *really* wants to use their own custom-cflags, let them
+	if use custom-cflags; then
+		einfo "User wants their own CFLAGS - removing defaults"
+		# try and remove all the default custom-cflags
+		find "${S}" -name Makefile -o -name Rules.mk -o -name Config.mk -exec sed \
+			-e 's/CFLAGS\(.*\)=\(.*\)-O3\(.*\)/CFLAGS\1=\2\3/' \
+			-e 's/CFLAGS\(.*\)=\(.*\)-march=i686\(.*\)/CFLAGS\1=\2\3/' \
+			-e 's/CFLAGS\(.*\)=\(.*\)-fomit-frame-pointer\(.*\)/CFLAGS\1=\2\3/' \
+			-e 's/CFLAGS\(.*\)=\(.*\)-g3*\s\(.*\)/CFLAGS\1=\2 \3/' \
+			-e 's/CFLAGS\(.*\)=\(.*\)-O2\(.*\)/CFLAGS\1=\2\3/' \
+			-i {} \;
+	fi
+
+	# Patch the unmergeable newlib, fix most of the leftover gcc QA issues
+	cp "${FILESDIR}"/newlib-implicits.patch stubdom || die
+
+	# Patch stubdom/Makefile to patch insource newlib & prevent internal downloading
+	epatch "${FILESDIR}"/${PN/-pvgrub/}-4.3-externals.patch
+
+	# fix jobserver in Makefile
+	epatch "${FILESDIR}"/${PN}-4.2-jserver.patch
+
+	# bug 595354
+	epatch "${FILESDIR}"/${P}-fix-boot-p2m.patch
+
+	#Substitute for internal downloading. pciutils copied only due to the only .bz2
+	cp "${DISTDIR}"/pciutils-2.2.9.tar.bz2 ./stubdom/ || die "pciutils not copied to stubdom"
+	retar-externals || die "re-tar procedure failed"
+
+	epatch_user
+}
+
+src_configure() {
+	local myconf="--prefix=${PREFIX}/usr \
+		--libdir=${PREFIX}/usr/$(get_libdir) \
+		--libexecdir=${PREFIX}/usr/libexec \
+		--disable-werror \
+		--disable-xen"
+
+	econf ${myconf}
+}
+
+src_compile() {
+	use custom-cflags || unset CFLAGS
+	if test-flag-CC -fno-strict-overflow; then
+		append-flags -fno-strict-overflow
+	fi
+
+	emake CC="$(tc-getCC)" LD="$(tc-getLD)" AR="$(tc-getAR)" -C tools/include
+
+	if use x86; then
+		emake CC="$(tc-getCC)" LD="$(tc-getLD)" AR="$(tc-getAR)" \
+		XEN_TARGET_ARCH="x86_32" -C stubdom pv-grub
+	elif use amd64; then
+		emake CC="$(tc-getCC)" LD="$(tc-getLD)" AR="$(tc-getAR)" \
+		XEN_TARGET_ARCH="x86_64" -C stubdom pv-grub
+		if has_multilib_profile; then
+			multilib_toolchain_setup x86
+			emake CC="$(tc-getCC)" AR="$(tc-getAR)" \
+			XEN_TARGET_ARCH="x86_32" -C stubdom pv-grub
+		fi
+	fi
+}
+
+src_install() {
+	if use x86; then
+		emake XEN_TARGET_ARCH="x86_32" DESTDIR="${D}" -C stubdom install-grub
+	fi
+	if use amd64; then
+		emake XEN_TARGET_ARCH="x86_64" DESTDIR="${D}" -C stubdom install-grub
+		if has_multilib_profile; then
+			emake XEN_TARGET_ARCH="x86_32" DESTDIR="${D}" -C stubdom install-grub
+		fi
+	fi
+}
+
+pkg_postinst() {
+	elog "Official Xen Guide and the offical wiki page:"
+	elog "https://wiki.gentoo.org/wiki/Xen"
+	elog "http://wiki.xen.org/wiki/Main_Page"
+}