LoongArch: Add Kconfig option AS_HAS_EXPLICIT_RELOCS

GNU as >= 2.40 and GCC >= 13 will support using explicit relocation hints in the assembly code, instead of la.* macros. The usage of explicit relocation hints can improve code generation so it's enabled by default by GCC >= 13. Introduce a Kconfig option AS_HAS_EXPLICIT_RELOCS as the switch for "use explicit relocation hints or not". Tested-by: WANG Xuerui <[email protected]> Signed-off-by: Xi Ruoyao <[email protected]> Signed-off-by: Huacai Chen <[email protected]>
jessfraz · Oct 11, 2022 · 7ca8dfd · 7ca8dfd
1 parent 8364c82
commit 7ca8dfd
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig
@@ -195,6 +195,9 @@ config SCHED_OMIT_FRAME_POINTER
 	bool
 	default y
 
+config AS_HAS_EXPLICIT_RELOCS
+	def_bool $(as-instr,x:pcalau12i \$t0$(comma)%pc_hi20(x))
+
 menu "Kernel type and options"
 
 source "kernel/Kconfig.hz"