1#!/bin/bash 2# SPDX-License-Identifier: GPL-2.0 3 4set -e 5set -o pipefail 6 7# To debug, uncomment the following line 8# set -x 9 10# Output from -fpatchable-function-entry can only vary on ppc64 elfv2, so this 11# should not be invoked for other targets. Therefore we can pass in -m64 and 12# -mabi explicitly, to take care of toolchains defaulting to other targets. 13 14# Test whether the compile option -fpatchable-function-entry exists and 15# generates appropriate code 16echo "int func() { return 0; }" | \ 17 $* -m64 -mabi=elfv2 -S -x c -O2 -fpatchable-function-entry=2 - -o - 2> /dev/null | \ 18 grep -q "__patchable_function_entries" 19 20# Test whether nops are generated after the local entry point 21echo "int x; int func() { return x; }" | \ 22 $* -m64 -mabi=elfv2 -S -x c -O2 -fpatchable-function-entry=2 - -o - 2> /dev/null | \ 23 awk 'BEGIN { RS = ";" } /\.localentry.*nop.*\n[[:space:]]*nop/ { print $0 }' | \ 24 grep -q "func:" 25 26exit 0 27