Re: [RFC PATCH 4/4] LoongArch: Remove -fno-jump-tables for objtool

From: Xi Ruoyao
Date: Fri Jul 12 2024 - 05:50:13 EST


On Fri, 2024-07-12 at 17:15 +0800, Tiezhu Yang wrote:
> -ifdef CONFIG_OBJTOOL
> -KBUILD_CFLAGS += -fno-jump-tables
> -endif
> +KBUILD_AFLAGS += $(call cc-option,-mannotate-tablejump) $(call cc-option,-Wa$(comma)-mannotate-tablejump)
> +KBUILD_CFLAGS += $(call cc-option,-mannotate-tablejump) $(call cc-option,-Wa$(comma)-mannotate-tablejump)

KBUILD_AFLAGS isn't needed, and $(call cc-option,-Wa$(comma)-mannotate-
tablejump) will always expand to nothing because the assembler does not
have -mannotate-tablejump.

The assembler never creates a jump table itself.

--
Xi Ruoyao <xry111@xxxxxxxxxxx>
School of Aerospace Science and Technology, Xidian University