From 9feadb1aa2eef5fe4a2099e38344ce18c8a8ae8b Mon Sep 17 00:00:00 2001
From: kettenis <kettenis@openbsd.org>
Date: Mon, 18 Dec 2017 20:03:48 +0000
Subject: [PATCH] Generate SIGBUS/BUS_ADRALN when we see a PC Alignment
 Exception from userland.

ok patrick@
---
 sys/arch/arm64/arm64/trap.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/sys/arch/arm64/arm64/trap.c b/sys/arch/arm64/arm64/trap.c
index 5e14cfd87b5..dfe631791f0 100644
--- a/sys/arch/arm64/arm64/trap.c
+++ b/sys/arch/arm64/arm64/trap.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: trap.c,v 1.11 2017/09/16 02:03:40 guenther Exp $ */
+/* $OpenBSD: trap.c,v 1.12 2017/12/18 20:03:48 kettenis Exp $ */
 /*-
  * Copyright (c) 2014 Andrew Turner
  * All rights reserved.
@@ -307,6 +307,11 @@ do_el0_sync(struct trapframe *frame)
 		vfp_save();
 		data_abort(frame, esr, 1, 1);
 		break;
+	case EXCP_PC_ALIGN:
+		vfp_save();
+		sv.sival_ptr = (void *)frame->tf_elr;
+		trapsignal(p, SIGBUS, 0, BUS_ADRALN, sv);
+		break;
 	case EXCP_DATA_ABORT_L:
 		vfp_save();
 		data_abort(frame, esr, 1, 0);
-- 
2.20.1