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