From b913c3f0790a4785b2cf0afa49d4c3e4ffddc2cd Mon Sep 17 00:00:00 2001 From: Masahiro Yamada Date: Fri, 27 Jan 2017 16:15:29 +0900 Subject: [PATCH] arm64: use xzr to zero-out the bss section AArch64 has a zero register (xzr). Use it instead of x2. Signed-off-by: Masahiro Yamada Reviewed-by: Simon Glass --- arch/arm/lib/crt0_64.S | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/arch/arm/lib/crt0_64.S b/arch/arm/lib/crt0_64.S index 91b19e00da..f8e84b2fc8 100644 --- a/arch/arm/lib/crt0_64.S +++ b/arch/arm/lib/crt0_64.S @@ -117,9 +117,8 @@ relocation_return: */ ldr x0, =__bss_start /* this is auto-relocated! */ ldr x1, =__bss_end /* this is auto-relocated! */ - mov x2, #0 clear_loop: - str x2, [x0] + str xzr, [x0] add x0, x0, #8 cmp x0, x1 b.lo clear_loop -- 2.25.1