From 1bfaa37fd3486e66131de9cb87747c84b4c89a05 Mon Sep 17 00:00:00 2001
From: "Jiri Slaby (SUSE)" <jirislaby@kernel.org>
Date: Mon, 30 Oct 2023 12:34:16 +0100
Subject: [PATCH] kbuild: dummy-tools: pretend we understand
-fpatchable-function-entry
Commit 0f71dcfb4aef ("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>
---
scripts/dummy-tools/gcc | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/scripts/dummy-tools/gcc b/scripts/dummy-tools/gcc
index 07f6dc4c5cf69..e6c41427c02f3 100755
--- a/scripts/dummy-tools/gcc
+++ b/scripts/dummy-tools/gcc
@@ -91,6 +91,16 @@ if arg_contain -S "$@"; then
fi
exit 0
fi
+
+ # For arch/powerpc/tools/gcc-check-fpatchable-function-entry.sh
+ if arg_contain -m64 "$@" && arg_contain -fpatchable-function-entry=2 "$@"; then
+ echo "func:"
+ echo ".section __patchable_function_entries"
+ echo ".localentry"
+ echo " nop"
+ echo " nop"
+ exit 0
+ fi
fi
# To set GCC_PLUGINS
--
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