diff --git a/lib/csu/aarch64/crti.S b/lib/csu/aarch64/crti.S
--- a/lib/csu/aarch64/crti.S
+++ b/lib/csu/aarch64/crti.S
@@ -35,14 +35,14 @@
 	.globl	_init
 	.type	_init,@function
 _init:
-	sub	sp, sp, #16
-	str	lr, [sp]
+	stp	x29, x30, [sp, #-16]!
+	mov	x29, sp
 
 	.section .fini,"ax",@progbits
 	.align 4
 	.globl	_fini
 	.type	_fini,@function
 _fini:
-	sub	sp, sp, #16
-	str	lr, [sp]
+	stp	x29, x30, [sp, #-16]!
+	mov	x29, sp
 
diff --git a/lib/csu/aarch64/crtn.S b/lib/csu/aarch64/crtn.S
--- a/lib/csu/aarch64/crtn.S
+++ b/lib/csu/aarch64/crtn.S
@@ -31,14 +31,12 @@
 __FBSDID("$FreeBSD$");
 
 	.section .init,"ax",@progbits
-	ldr	lr, [sp]
-	add	sp, sp, #16
+	ldp	x29, x30, [sp], #16
 	ret
 
 
 	.section .fini,"ax",@progbits
-	ldr	lr, [sp]
-	add	sp, sp, #16
+	ldp	x29, x30, [sp], #16
 	ret
 
 	.section .note.GNU-stack,"",%progbits