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kbuild: dummy-tools: pretend we understand -fpatchable-function-entry

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Commit 0f71dcfb4a ("powerpc/ftrace: Add support for
-fpatchable-function-entry") added a script to check for
-fpatchable-function-entry compiler support. The script expects compiler
to emit the section __patchable_function_entries and few nops after a
function entry.

If the compiler understands and emits the above,
CONFIG_ARCH_USING_PATCHABLE_FUNCTION_ENTRY is set.

So teach dummy-tools' gcc about this.

Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
This commit is contained in:
Jiri Slaby (SUSE) 2023-10-30 12:34:16 +01:00 committed by Masahiro Yamada
parent 766b7007a1
commit 1bfaa37fd3
1 changed files with 10 additions and 0 deletions
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10
scripts/dummy-tools/gcc
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@ -91,6 +91,16 @@ if arg_contain -S "$@"; then
fi fi
exit 0 exit 0
fi fi
# For arch/powerpc/tools/gcc-check-fpatchable-function-entry.sh
if arg_contain -m64 "$@" && arg_contain -fpatchable-function-entry=2 "$@"; then
echo "func:"
echo ".section __patchable_function_entries"
echo ".localentry"
echo " nop"
echo " nop"
exit 0
fi
fi fi
# To set GCC_PLUGINS # To set GCC_PLUGINS