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powerpc/tools: Pass -mabi=elfv2 to gcc-check-mprofile-kernel.sh

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Toolchains don't always default to the ELFv2 ABI. This is true with at
least the kernel.org toolchains. As such, pass -mabi=elfv2 explicitly to
ensure that we are testing against the correct compiler output.

Signed-off-by: Naveen N Rao <naveen@kernel.org>
[mpe: Tweak comment wording]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230530093821.298590-1-naveen@kernel.org
This commit is contained in:
Naveen N Rao 2023-05-30 15:08:21 +05:30 committed by Michael Ellerman
parent 269d79fb30
commit d42f55e8ae
1 changed files with 5 additions and 6 deletions
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11
arch/powerpc/tools/gcc-check-mprofile-kernel.sh
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@ -7,21 +7,20 @@ set -o pipefail
# To debug, uncomment the following line
# set -x
# -mprofile-kernel is only supported on 64-bit, so this should not be invoked
# for 32-bit. We pass in -m64 explicitly, and -mbig-endian and -mlittle-endian
# are passed in from Kconfig, which takes care of toolchains defaulting to
# other targets.
# -mprofile-kernel is only supported on 64-bit with 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 -mprofile-kernel exists and generates
# profiling code (ie. a call to _mcount()).
echo "int func() { return 0; }" | \
$* -m64 -S -x c -O2 -p -mprofile-kernel - -o - \
$* -m64 -mabi=elfv2 -S -x c -O2 -p -mprofile-kernel - -o - \
2> /dev/null | grep -q "_mcount"
# Test whether the notrace attribute correctly suppresses calls to _mcount().
echo -e "#include <linux/compiler.h>\nnotrace int func() { return 0; }" | \
$* -m64 -S -x c -O2 -p -mprofile-kernel - -o - \
$* -m64 -mabi=elfv2 -S -x c -O2 -p -mprofile-kernel - -o - \
2> /dev/null | grep -q "_mcount" && \
exit 1