[src/trunk]: src/sys/arch/i386/i386 pte0 is used to map the page required by ...

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

details:   https://anonhg.NetBSD.org/src/rev/7dda3642089c
branches:  trunk
changeset: 756390:7dda3642089c
user:      jym <jym%NetBSD.org@localhost>
date:      Thu Jul 15 22:19:19 2010 +0000

description:
pte0 is used to map the page required by bioscall() trampoline code, so
add VM_PROT_EXECUTE protection for it.

Currently, this does not change much, as page execute permission is not
enforced for i386 (except for Xen, where BIOS calls are not used anyway).

diffstat:

 sys/arch/i386/i386/machdep.c |  6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diffs (27 lines):

diff -r 53ebd1377296 -r 7dda3642089c sys/arch/i386/i386/machdep.c
--- a/sys/arch/i386/i386/machdep.c      Thu Jul 15 22:18:20 2010 +0000
+++ b/sys/arch/i386/i386/machdep.c      Thu Jul 15 22:19:19 2010 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: machdep.c,v 1.688 2010/07/14 14:42:40 jym Exp $        */
+/*     $NetBSD: machdep.c,v 1.689 2010/07/15 22:19:19 jym Exp $        */
 
 /*-
  * Copyright (c) 1996, 1997, 1998, 2000, 2004, 2006, 2008, 2009
@@ -67,7 +67,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.688 2010/07/14 14:42:40 jym Exp $");
+__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.689 2010/07/15 22:19:19 jym Exp $");
 
 #include "opt_beep.h"
 #include "opt_compat_ibcs2.h"
@@ -1236,7 +1236,7 @@
 
        paddr = 4 * PAGE_SIZE;
        vaddr = (vaddr_t)vtopte(0);
-       pmap_kenter_pa(vaddr, paddr, VM_PROT_READ | VM_PROT_WRITE, 0);
+       pmap_kenter_pa(vaddr, paddr, VM_PROT_ALL, 0);
        pmap_update(pmap_kernel());
        /* make sure it is clean before using */
        memset((void *)vaddr, 0, PAGE_SIZE);