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