ADDED   src/runtime/lookup-asm/lookup-asm-arm64-elf.S
Index: src/runtime/lookup-asm/lookup-asm-arm64-elf.S
==================================================================
--- src/runtime/lookup-asm/lookup-asm-arm64-elf.S
+++ src/runtime/lookup-asm/lookup-asm-arm64-elf.S
@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016
+ *   Jonathan Schleifer <js@heap.zone>
+ *
+ * All rights reserved.
+ *
+ * This file is part of ObjFW. It may be distributed under the terms of the
+ * Q Public License 1.0, which can be found in the file LICENSE.QPL included in
+ * the packaging of this file.
+ *
+ * Alternatively, it may be distributed under the terms of the GNU General
+ * Public License, either version 2 or 3, which can be found in the file
+ * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
+ * file.
+ */
+
+#include "config.h"
+
+#include "platform.h"
+
+.globl objc_msg_lookup
+.globl objc_msg_lookup_stret
+.globl objc_msg_lookup_super
+.globl objc_msg_lookup_super_stret
+
+.section .text
+.macro generate_lookup name not_found
+\name:
+	cmp	x0, #0
+	beq	ret_nil
+
+	ldr	x2, [x0, #0]
+	ldr	x2, [x2, #64]
+
+.Lmain_\name:
+#ifdef OF_SELUID24
+	ldrb	w3, [x1, #2]
+	ldr	x2, [x2, x3, lsl #3]
+#endif
+	ldrb	w3, [x1, #1]
+	ldr	x2, [x2, x3, lsl #3]
+	ldrb	w3, [x1, #0]
+	ldr	x2, [x2, x3, lsl #3]
+
+	cmp	x2, #0
+	beq	\not_found
+
+	mov	x0, x2
+	ret
+.type \name, %function
+.size \name, .-\name
+.endm
+
+.macro generate_lookup_super name lookup
+\name:
+	ldr	x2, [x0, #0]
+	cmp	x0, #0
+	beq	ret_nil
+
+	ldr	x2, [x0, #8]
+	ldr	x2, [x2, #64]
+
+	b	.Lmain_\lookup
+.type \name, %function
+.size \name, .-\name
+.endm
+
+generate_lookup objc_msg_lookup objc_method_not_found
+generate_lookup objc_msg_lookup_stret objc_method_not_found_stret
+generate_lookup_super objc_msg_lookup_super objc_msg_lookup
+generate_lookup_super objc_msg_lookup_super_stret objc_msg_lookup_stret
+
+ret_nil:
+	adr	x0, nil_method
+	ret
+
+nil_method:
+	mov	x0, #0
+	ret
+
+#ifdef OF_LINUX
+.section .note.GNU-stack, "", %progbits
+#endif

Index: src/runtime/lookup-asm/lookup-asm.S
==================================================================
--- src/runtime/lookup-asm/lookup-asm.S
+++ src/runtime/lookup-asm/lookup-asm.S
@@ -21,10 +21,12 @@
 #if defined(OF_ELF)
 # if defined(OF_X86_64)
 #  include "lookup-asm-x86_64-elf.S"
 # elif defined(OF_X86)
 #  include "lookup-asm-x86-elf.S"
+# elif defined(OF_ARM64)
+#  include "lookup-asm-arm64-elf.S"
 # elif defined(OF_ARM)
 #  include "lookup-asm-arm-elf.S"
 # elif defined(OF_POWERPC)
 #  include "lookup-asm-ppc-elf.S"
 # elif defined(OF_MIPS)

Index: src/runtime/runtime-private.h
==================================================================
--- src/runtime/runtime-private.h
+++ src/runtime/runtime-private.h
@@ -184,12 +184,12 @@
 #endif
 }
 
 #if defined(OF_ELF)
 # if defined(OF_X86_64) || defined(OF_X86) || defined(OF_POWERPC) || \
-	defined(OF_ARM) || defined(OF_MIPS) || defined(OF_SPARC64) || \
-	defined(OF_SPARC)
+	defined(OF_ARM64) || defined(OF_ARM) || defined(OF_MIPS) || \
+	defined(OF_SPARC64) || defined(OF_SPARC)
 #  define OF_ASM_LOOKUP
 # endif
 #elif defined(OF_MACH_O)
 # if defined(OF_X86_64) || defined(OF_POWERPC)
 #  define OF_ASM_LOOKUP