1*73cdf24eSHari Bathini#!/bin/bash 2*73cdf24eSHari Bathini# SPDX-License-Identifier: GPL-2.0 3*73cdf24eSHari Bathini 4*73cdf24eSHari Bathiniset -e 5*73cdf24eSHari Bathini 6*73cdf24eSHari Bathini# To debug, uncomment the following line 7*73cdf24eSHari Bathini# set -x 8*73cdf24eSHari Bathini 9*73cdf24eSHari Bathini# Output from -fpatchable-function-entry can only vary on ppc64 elfv2, so this 10*73cdf24eSHari Bathini# should not be invoked for other targets. Therefore we can pass in -m64 and 11*73cdf24eSHari Bathini# -mabi explicitly, to take care of toolchains defaulting to other targets. 12*73cdf24eSHari Bathini 13*73cdf24eSHari Bathini# Test whether the compile option -fpatchable-function-entry exists and 14*73cdf24eSHari Bathini# generates appropriate code 15*73cdf24eSHari Bathiniecho "int func() { return 0; }" | \ 16*73cdf24eSHari Bathini $* -m64 -mabi=elfv2 -S -x c -O2 -fpatchable-function-entry=2 - -o - 2> /dev/null | \ 17*73cdf24eSHari Bathini grep -q "__patchable_function_entries" 18*73cdf24eSHari Bathini 19*73cdf24eSHari Bathini# Test whether nops are generated after the local entry point 20*73cdf24eSHari Bathiniecho "int x; int func() { return x; }" | \ 21*73cdf24eSHari Bathini $* -m64 -mabi=elfv2 -S -x c -O2 -fpatchable-function-entry=2 - -o - 2> /dev/null | \ 22*73cdf24eSHari Bathini awk 'BEGIN { RS = ";" } /\.localentry.*nop.*\n[[:space:]]*nop/ { print $0 }' | \ 23*73cdf24eSHari Bathini grep -q "func:" 24*73cdf24eSHari Bathini 25*73cdf24eSHari Bathiniexit 0 26