29 lines
885 B
Bash
Executable File
29 lines
885 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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set -o pipefail
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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, so this should not be invoked
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# for 32-bit. We pass in -m64 explicitly, and -mbig-endian and -mlittle-endian
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# are passed in from Kconfig, which takes care of toolchains defaulting to
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# 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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$* -m64 -S -x c -O2 -p -mprofile-kernel - -o - \
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2> /dev/null | grep -q "_mcount"
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# Test whether the notrace attribute correctly suppresses calls to _mcount().
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echo -e "#include <linux/compiler.h>\nnotrace int func() { return 0; }" | \
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$* -m64 -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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