diff --git a/lib/csu/aarch64/crt1_s.S b/lib/csu/aarch64/crt1_s.S
--- a/lib/csu/aarch64/crt1_s.S
+++ b/lib/csu/aarch64/crt1_s.S
@@ -33,6 +33,9 @@
 __FBSDID("$FreeBSD$");
 
 ENTRY(_start)
+	.cfi_undefined(x30)
+	mov	x29,#0
+	mov	x30,#0
 	mov	x3, x2		/* cleanup */
 	add	x1, x0, #8	/* load argv */
 	ldr	x0, [x0]	/* load argc */