Index: head/sys/arm64/arm64/trap.c
===================================================================
--- head/sys/arm64/arm64/trap.c
+++ head/sys/arm64/arm64/trap.c
@@ -87,6 +87,7 @@
 typedef void (abort_handler)(struct thread *, struct trapframe *, uint64_t,
     uint64_t, int);
 
+static abort_handler align_abort;
 static abort_handler data_abort;
 
 static abort_handler *abort_handlers[] = {
@@ -100,6 +101,7 @@
 	[ISS_DATA_DFSC_PF_L1] = data_abort,
 	[ISS_DATA_DFSC_PF_L2] = data_abort,
 	[ISS_DATA_DFSC_PF_L3] = data_abort,
+	[ISS_DATA_DFSC_ALIGN] = align_abort,
 };
 
 static __inline void
@@ -163,6 +165,17 @@
 		call_trapsignal(td, SIGILL, ILL_ILLOPN, (void *)frame->tf_elr);
 		userret(td, frame);
 	}
+}
+
+static void
+align_abort(struct thread *td, struct trapframe *frame, uint64_t esr,
+    uint64_t far, int lower)
+{
+	if (!lower)
+		panic("Misaligned access from kernel space!");
+
+	call_trapsignal(td, SIGBUS, BUS_ADRALN, (void *)frame->tf_elr);
+	userret(td, frame);
 }
 
 static void