[src/trunk]: src/sys/compat/darwin Bugfix: notifications sent by iohidsystem ...

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

details:   https://anonhg.NetBSD.org/src/rev/60ebfd16dc25
branches:  trunk
changeset: 551883:60ebfd16dc25
user:      manu <manu%NetBSD.org@localhost>
date:      Sat Sep 13 16:07:44 2003 +0000

description:
Bugfix: notifications sent by iohidsystem kernel threads are to be
hnalded as mmessages coming from the kernel, since the threas has
no p->p_emuldata

diffstat:

 sys/compat/darwin/darwin_iohidsystem.c |  12 +++++++++---
 1 files changed, 9 insertions(+), 3 deletions(-)

diffs (33 lines):

diff -r c4e9eef9c7b2 -r 60ebfd16dc25 sys/compat/darwin/darwin_iohidsystem.c
--- a/sys/compat/darwin/darwin_iohidsystem.c    Sat Sep 13 15:55:29 2003 +0000
+++ b/sys/compat/darwin/darwin_iohidsystem.c    Sat Sep 13 16:07:44 2003 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: darwin_iohidsystem.c,v 1.11 2003/09/13 07:56:54 manu Exp $ */
+/*     $NetBSD: darwin_iohidsystem.c,v 1.12 2003/09/13 16:07:44 manu Exp $ */
 
 /*-
  * Copyright (c) 2003 The NetBSD Foundation, Inc.
@@ -37,7 +37,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: darwin_iohidsystem.c,v 1.11 2003/09/13 07:56:54 manu Exp $");
+__KERNEL_RCSID(0, "$NetBSD: darwin_iohidsystem.c,v 1.12 2003/09/13 16:07:44 manu Exp $");
 
 #include "ioconf.h"
 #include "wsmux.h"
@@ -502,7 +502,13 @@
 #endif
        
        mr->mr_refcount++;
-       (void)mach_message_get((mach_msg_header_t *)req, sizeof(*req), mp, l);
+
+       /* 
+        * Call mach_message_get with a NULL lwp: the message is sent
+        * by the kernel, not a userprocess. If we do not do that, 
+        * we crash because iohidsystem thread has p->p_emuldata == NULL.
+        */
+       mach_message_get((mach_msg_header_t *)req, sizeof(*req), mp, NULL);
 #ifdef DEBUG_MACH_MSG
        printf("pid %d: message queued on port %p (%d) [%p]\n",
            l->l_proc->p_pid, mp, req->req_msgh.msgh_id,