Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
27 lines
864 B
Bash
Executable File
27 lines
864 B
Bash
Executable File
#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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set -e
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# To debug, uncomment the following line
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# set -x
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# -mprofile-kernel is only supported on 64-bit with ELFv2, so this should not
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# be invoked for other targets. Therefore we can pass in -m64 and -mabi
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# explicitly, to take care of toolchains defaulting to other targets.
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# Test whether the compile option -mprofile-kernel exists and generates
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# profiling code (ie. a call to _mcount()).
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echo "int func() { return 0; }" | \
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$* -m64 -mabi=elfv2 -S -x c -O2 -p -mprofile-kernel - -o - \
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2> /dev/null | grep -q "_mcount"
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# Test whether the notrace attribute correctly suppresses calls to _mcount().
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echo -e "#include <linux/compiler.h>\nnotrace int func() { return 0; }" | \
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$* -m64 -mabi=elfv2 -S -x c -O2 -p -mprofile-kernel - -o - \
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2> /dev/null | grep -q "_mcount" && \
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exit 1
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exit 0
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