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kpatch-build: add support for CONFIG_LIVEPATCH on RHEL

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Fix the version checks for when we enable CONFIG_LIVEPATCH on RHEL.  It
will be based on the latest upstream code.

Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
This commit is contained in:
Josh Poimboeuf 2017-10-18 06:33:27 -05:00
parent d44a4b9df5
commit 2e85ec5672
2 changed files with 12 additions and 5 deletions
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9
kmod/patch/livepatch-patch-hook.c
View File

@ -35,17 +35,20 @@
#define UTS_UBUNTU_RELEASE_ABI 0
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 7, 0)
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 7, 0) || \
defined(RHEL_RELEASE_CODE)
#define HAVE_ELF_RELOCS
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 5, 0) || \
(LINUX_VERSION_CODE >= KERNEL_VERSION(4, 4, 0) && \
UTS_UBUNTU_RELEASE_ABI >= 7)
UTS_UBUNTU_RELEASE_ABI >= 7) || \
defined(RHEL_RELEASE_CODE)
#define HAVE_SYMPOS
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 12, 0)
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 12, 0) || \
defined(RHEL_RELEASE_CODE)
#define HAVE_IMMEDIATE
#endif

8
kpatch-build/kpatch-build
View File

@ -136,6 +136,10 @@ version_gte() {
[ "$1" = "$(echo -e "$1\n$2" | sort -rV | head -n1)" ]
}
is_rhel() {
[[ $1 =~ \.el[78]\. ]]
}
find_dirs() {
if [[ -e "$SCRIPTDIR/create-diff-object" ]]; then
# git repo
@ -599,10 +603,10 @@ KPATCH_MODULE=true
grep -q "CONFIG_DEBUG_INFO=y" "$CONFIGFILE" || die "kernel doesn't have 'CONFIG_DEBUG_INFO' enabled"
if grep -q "CONFIG_LIVEPATCH=y" "$CONFIGFILE"; then
# The kernel supports livepatch.
if version_gte "${ARCHVERSION//-*/}" 4.7.0; then
if version_gte "${ARCHVERSION//-*/}" 4.7.0 || is_rhel "$ARCHVERSION"; then
# Use new .klp.rela. sections
KPATCH_MODULE=false
if version_gte "${ARCHVERSION//-*/}" 4.9.0; then
if version_gte "${ARCHVERSION//-*/}" 4.9.0 || is_rhel "$ARCHVERSION"; then
KPATCH_LDFLAGS="--unique=.parainstructions --unique=.altinstructions"
fi
fi