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kpatch/s390: Add gcc prerequisite flags for kpatch 

1. -mno-pic-data-is-text-relative prevents relative addressing between
   code and data. This is needed to avoid relocation error when klp text
   and data are too far apart

2. Avoid generation of LANCHOR symbols through -fno-section-anchors.
   kpatch-build does not handle it well.

Signed-off-by: Sumanth Korikkar <sumanthk@linux.ibm.com>
This commit is contained in:
Sumanth Korikkar 2022-03-29 10:20:19 +02:00
parent c6d0b5450b
commit 10002f5aa6
1 changed files with 4 additions and 0 deletions
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kpatch-build/kpatch-build
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@ -937,6 +937,10 @@ if [[ "$ARCH" = "ppc64le" ]]; then
ARCH_KCFLAGS="-mcmodel=large -fplugin=$PLUGINDIR/ppc64le-plugin.so" ARCH_KCFLAGS="-mcmodel=large -fplugin=$PLUGINDIR/ppc64le-plugin.so"
fi fi
if [[ "$ARCH" = "s390x" ]]; then
ARCH_KCFLAGS="-mno-pic-data-is-text-relative -fno-section-anchors"
fi
export KCFLAGS="-I$DATADIR/patch -ffunction-sections -fdata-sections \ export KCFLAGS="-I$DATADIR/patch -ffunction-sections -fdata-sections \
$ARCH_KCFLAGS $DEBUG_KCFLAGS" $ARCH_KCFLAGS $DEBUG_KCFLAGS"