[src/trunk]: src/sys/arch/xen/x86 Map the PTE space as non-executable on PAE....

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

details:   https://anonhg.NetBSD.org/src/rev/e997e426f596
branches:  trunk
changeset: 348652:e997e426f596
user:      maxv <maxv%NetBSD.org@localhost>
date:      Tue Nov 01 12:16:10 2016 +0000

description:
Map the PTE space as non-executable on PAE. The same is already done on
amd64.

diffstat:

 sys/arch/xen/x86/x86_xpmap.c |  7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)

diffs (28 lines):

diff -r 1385c841a30a -r e997e426f596 sys/arch/xen/x86/x86_xpmap.c
--- a/sys/arch/xen/x86/x86_xpmap.c      Tue Nov 01 12:00:21 2016 +0000
+++ b/sys/arch/xen/x86/x86_xpmap.c      Tue Nov 01 12:16:10 2016 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: x86_xpmap.c,v 1.62 2016/11/01 12:00:21 maxv Exp $      */
+/*     $NetBSD: x86_xpmap.c,v 1.63 2016/11/01 12:16:10 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 1.62 2016/11/01 12:00:21 maxv Exp $");
+__KERNEL_RCSID(0, "$NetBSD: x86_xpmap.c,v 1.63 2016/11/01 12:16:10 maxv Exp $");
 
 #include "opt_xen.h"
 #include "opt_ddb.h"
@@ -994,7 +994,8 @@
         */
        addr = (u_long)pde - KERNBASE;
        for (i = 0; i < 3; i++, addr += PAGE_SIZE) {
-               pde[PDIR_SLOT_PTE + i] = xpmap_ptom_masked(addr) | PG_k | PG_V;
+               pde[PDIR_SLOT_PTE + i] = xpmap_ptom_masked(addr) | PG_k | PG_V |
+                   pg_nx;
                __PRINTK(("pde[%d] va %#" PRIxVADDR " pa %#" PRIxPADDR
                    " entry %#" PRIxPADDR "\n",
                    (int)(PDIR_SLOT_PTE + i), pde + PAGE_SIZE * i,