[src/trunk]: src/sys/arch/usermode/usermode Check for NULL pcb!

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

details:   https://anonhg.NetBSD.org/src/rev/59c1a67af7e0
branches:  trunk
changeset: 769288:59c1a67af7e0
user:      reinoud <reinoud%NetBSD.org@localhost>
date:      Mon Sep 05 18:50:34 2011 +0000

description:
Check for NULL pcb!

diffstat:

 sys/arch/usermode/usermode/trap.c |  9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)

diffs (30 lines):

diff -r e2b8df43350f -r 59c1a67af7e0 sys/arch/usermode/usermode/trap.c
--- a/sys/arch/usermode/usermode/trap.c Mon Sep 05 18:31:04 2011 +0000
+++ b/sys/arch/usermode/usermode/trap.c Mon Sep 05 18:50:34 2011 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: trap.c,v 1.26 2011/09/05 12:04:40 reinoud Exp $ */
+/* $NetBSD: trap.c,v 1.27 2011/09/05 18:50:34 reinoud Exp $ */
 
 /*-
  * Copyright (c) 2011 Reinoud Zandijk <reinoud%netbsd.org@localhost>
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: trap.c,v 1.26 2011/09/05 12:04:40 reinoud Exp $");
+__KERNEL_RCSID(0, "$NetBSD: trap.c,v 1.27 2011/09/05 18:50:34 reinoud Exp $");
 
 #include <sys/types.h>
 #include <sys/param.h>
@@ -174,6 +174,11 @@
                if (!pmap_fault(vm_map->pmap, va, &atype)) {
                        aprint_debug("pmap fault couldn't handle it! : "
                                "derived atype %d\n", atype);
+
+                       /* extra debug for now */
+                       if (pcb == 0)
+                               panic("NULL pcb!\n");
+
                        pcb->pcb_onfault = NULL;
                        rv = uvm_fault(vm_map, va, atype);
                        pcb->pcb_onfault = onfault;