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Fixes:0f71dcfb4a("powerpc/ftrace: Add support for -fpatchable-function-entry") Fixes:b71c9ffb14("powerpc: Add arch/powerpc/tools directory") Reported-by: Joe Lawrence <joe.lawrence@redhat.com> Acked-by: Joe Lawrence <joe.lawrence@redhat.com> Signed-off-by: Jan Stancek <jstancek@redhat.com> Fixes:8c50b72a3b("powerpc/ftrace: Add Kconfig & Make glue for mprofile-kernel") Fixes:abba759796("powerpc/kbuild: move -mprofile-kernel check to Kconfig") Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Reviewed-by: Naveen N Rao (AMD) <naveen@kernel.org> Reviewed-by: Josh Poimboeuf <jpoimboe@kernel.org> Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com> Link: https://patch.msgid.link/cc6cdd116c3ad9d990df21f13c6d8e8a83815bbd.1758641374.git.jstancek@redhat.com
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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