1 #!/bin/bash
2 # SPDX-License-Identifier: GPL-2.0
3
4 set -e
5 set -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
16 echo "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
21 echo "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
26 exit 0
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