[src/trunk]: src/sys/arch/xen/x86 Make the I/O area non-executable on Xen.

[maxv <maxv%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/e6392fccf8a8
branches:  trunk
changeset: 347053:e6392fccf8a8
user:      maxv <maxv%NetBSD.org@localhost>
date:      Thu Aug 11 15:35:10 2016 +0000

description:
Make the I/O area non-executable on Xen.

diffstat:

 sys/arch/xen/x86/x86_xpmap.c |  5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diffs (26 lines):

diff -r 4843d3a36609 -r e6392fccf8a8 sys/arch/xen/x86/x86_xpmap.c
--- a/sys/arch/xen/x86/x86_xpmap.c      Thu Aug 11 15:16:54 2016 +0000
+++ b/sys/arch/xen/x86/x86_xpmap.c      Thu Aug 11 15:35:10 2016 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: x86_xpmap.c,v 1.58 2016/08/03 11:51:18 maxv Exp $      */
+/*     $NetBSD: x86_xpmap.c,v 1.59 2016/08/11 15:35:10 maxv Exp $      */
 
 /*
  * Copyright (c) 2006 Mathieu Ropert <mro%adviseo.fr@localhost>
@@ -69,7 +69,7 @@
 
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: x86_xpmap.c,v 1.58 2016/08/03 11:51:18 maxv Exp $");
+__KERNEL_RCSID(0, "$NetBSD: x86_xpmap.c,v 1.59 2016/08/11 15:35:10 maxv Exp $");
 
 #include "opt_xen.h"
 #include "opt_ddb.h"
@@ -913,6 +913,7 @@
                            page < (vaddr_t)atdevbase + IOM_SIZE) {
                                pte[pl1_pi(page)] =
                                    IOM_BEGIN + (page - (vaddr_t)atdevbase);
+                               pte[pl1_pi(page)] |= pg_nx;
                        }
 #endif