Index: configure.ac
==================================================================
--- configure.ac
+++ configure.ac
@@ -841,10 +841,23 @@
 		AC_DEFINE(HAVE_VFP2, 1, [Whether we have VFP2 or above])
 		AC_MSG_RESULT(yes)
 	], [
 		AC_MSG_RESULT(no)
 	])
+	;;
+aarch64* | arm64*)
+	AC_MSG_CHECKING(for bti)
+	AC_COMPILE_IFELSE([
+		AC_LANG_PROGRAM([], [
+			__asm__ __volatile__ ("bti jc");
+		])
+	], [
+		AC_DEFINE(HAVE_BTI, 1, [Whether we have bti])
+		AC_MSG_RESULT(yes)
+	], [
+		AC_MSG_RESULT(no)
+	])
 	;;
 i?86)
 	AC_MSG_CHECKING(for endbr32)
 	AC_COMPILE_IFELSE([
 		AC_LANG_PROGRAM([], [

Index: src/forwarding/apple-forwarding-arm64.S
==================================================================
--- src/forwarding/apple-forwarding-arm64.S
+++ src/forwarding/apple-forwarding-arm64.S
@@ -31,10 +31,14 @@
 
 .section __TEXT, __text, regular, pure_instructions
 .align 2
 _OFForward:
 _OFForward_stret:
+#ifdef HAVE_BTI
+	bti	jc
+#endif
+
 	stp	fp, lr, [sp, #-208]!
 	mov	fp, sp
 	sub	sp, sp, #208
 
 	/* Save all arguments, x8 and x19 */

Index: src/forwarding/forwarding-arm64-elf.S
==================================================================
--- src/forwarding/forwarding-arm64-elf.S
+++ src/forwarding/forwarding-arm64-elf.S
@@ -21,10 +21,14 @@
 .globl OFForward_stret
 
 .section .text
 OFForward:
 OFForward_stret:
+#ifdef HAVE_BTI
+	bti	jc
+#endif
+
 	stp	fp, lr, [sp, #-208]!
 	mov	fp, sp
 	sub	sp, sp, #208
 
 	/* Save all arguments, x8 and x19 */
@@ -101,10 +105,14 @@
 .size OFForward, .-OFForward
 .type OFForward_stret, %function
 .size OFForward_stret, .-OFForward_stret
 
 init:
+#ifdef HAVE_BTI
+	bti	c
+#endif
+
 	adrp	x0, module
 	add	x0, x0, :lo12:module
 	b	__objc_exec_class
 
 .section .init_array, "aw", %init_array

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
@@ -23,10 +23,14 @@
 .globl objc_msg_lookup_super_stret
 
 .section .text
 .macro GENERATE_LOOKUP name notFound
 \name:
+#ifdef HAVE_BTI
+	bti	jc
+#endif
+
 	cbz	x0, returnNilMethod
 
 	tst	x0, #1
 	b.ne	.LtaggedPointer_\name
 
@@ -66,10 +70,14 @@
 .size \name, .-\name
 .endm
 
 .macro GENERATE_LOOKUP_SUPER name lookup
 \name:
+#ifdef HAVE_BTI
+	bti	jc
+#endif
+
 	mov	x2, x0
 	ldr	x0, [x0]
 	cbz	x0, returnNilMethod
 
 	ldr	x2, [x2, #8]