[weiden] 13576: 1. a few previous mode fixes

1. a few previous mode fixes
2. implemented NtSetDefaultHardErrorPort() with help of pseudo code from
windowsitlibrary.com
Modified: trunk/reactos/ntoskrnl/ke/alert.c
Modified: trunk/reactos/ntoskrnl/ke/apc.c
Modified: trunk/reactos/ntoskrnl/ke/error.c
  _____  

Modified: trunk/reactos/ntoskrnl/ke/alert.c
--- trunk/reactos/ntoskrnl/ke/alert.c	2005-02-14 18:45:17 UTC (rev
13575)
+++ trunk/reactos/ntoskrnl/ke/alert.c	2005-02-14 21:00:05 UTC (rev
13576)
@@ -107,13 +107,16 @@

 NTSTATUS STDCALL
 NtAlertThread (IN HANDLE ThreadHandle)
 {
+   KPROCESSOR_MODE PreviousMode;
    PETHREAD Thread;
    NTSTATUS Status;
+   
+   PreviousMode = ExGetPreviousMode();
 
    Status = ObReferenceObjectByHandle(ThreadHandle,
                   THREAD_SUSPEND_RESUME,
                   PsThreadType,
-                  ExGetPreviousMode(),
+                  PreviousMode,
                   (PVOID*)&Thread,
                   NULL);
    if (!NT_SUCCESS(Status))
@@ -125,7 +128,7 @@
     * ZwAlertThread was called?
     * -Gunnar
     */ 
-   KeAlertThread((PKTHREAD)Thread, UserMode);
+   KeAlertThread((PKTHREAD)Thread, PreviousMode);
    
    ObDereferenceObject(Thread);
    return(STATUS_SUCCESS);
  _____  

Modified: trunk/reactos/ntoskrnl/ke/apc.c
--- trunk/reactos/ntoskrnl/ke/apc.c	2005-02-14 18:45:17 UTC (rev
13575)
+++ trunk/reactos/ntoskrnl/ke/apc.c	2005-02-14 21:00:05 UTC (rev
13576)
@@ -1,4 +1,4 @@

-/* $Id:$
+/* $Id$
  *
  * COPYRIGHT:       See COPYING in the top level directory
  * PROJECT:         ReactOS kernel
@@ -517,13 +517,16 @@
 
 	PKAPC Apc;
 	PETHREAD Thread;
+	KPROCESSOR_MODE PreviousMode;
 	NTSTATUS Status;
+	
+	PreviousMode = ExGetPreviousMode();
 
 	/* Get ETHREAD from Handle */
 	Status = ObReferenceObjectByHandle(ThreadHandle,
 					   THREAD_SET_CONTEXT,
 					   PsThreadType,
-					   KeGetPreviousMode(),
+					   PreviousMode,
 					   (PVOID)&Thread,
 					   NULL);
 	
@@ -552,7 +555,7 @@
 			KiFreeApcRoutine,
 			NULL,
 			ApcRoutine,
-			UserMode,
+			PreviousMode,
 			NormalContext);
 	if (!KeInsertQueueApc(Apc, SystemArgument1, SystemArgument2,
IO_NO_INCREMENT)) {
 		Status = STATUS_UNSUCCESSFUL;
  _____  

Modified: trunk/reactos/ntoskrnl/ke/error.c
--- trunk/reactos/ntoskrnl/ke/error.c	2005-02-14 18:45:17 UTC (rev
13575)
+++ trunk/reactos/ntoskrnl/ke/error.c	2005-02-14 21:00:05 UTC (rev
13576)
@@ -1,4 +1,4 @@

-/* $Id:$
+/* $Id$
  *
  * COPYRIGHT:       See COPYING in the top level directory
  * PROJECT:         ReactOS kernel
@@ -15,6 +15,10 @@
 
 /* FUNCTIONS
***************************************************************/
 
+BOOLEAN ExReadyForErrors = FALSE;
+PEPORT ExpDefaultErrorPort = NULL;
+PEPROCESS ExpDefaultErrorPortProcess = NULL;
+
 /*
  * @unimplemented
  */
@@ -54,8 +58,41 @@
 NTSTATUS STDCALL 
 NtSetDefaultHardErrorPort(IN HANDLE PortHandle)
 {
-   UNIMPLEMENTED;
-   return(STATUS_NOT_IMPLEMENTED);
+  KPROCESSOR_MODE PreviousMode;
+  NTSTATUS Status;
+  
+  PreviousMode = ExGetPreviousMode();
+  
+  if(!SeSinglePrivilegeCheck(SeTcbPrivilege,
+                             PreviousMode))
+  {
+    DPRINT1("NtSetDefaultHardErrorPort: Caller requires the
SeTcbPrivilege privilege!\n");
+    return STATUS_PRIVILEGE_NOT_HELD;
+  }
+  
+  /* serialization shouldn't be required here as it usually is just
called once
+     during startup */
+  
+  if(!ExReadyForErrors)
+  {
+    Status = ObReferenceObjectByHandle(PortHandle,
+                                       0,
+                                       LpcPortObjectType,
+                                       PreviousMode,
+                                       (PVOID*)&ExpDefaultErrorPort,
+                                       NULL);
+    if(NT_SUCCESS(Status))
+    {
+      ExpDefaultErrorPortProcess = PsGetCurrentProcess();
+      ExReadyForErrors = TRUE;
+    }
+  }
+  else
+  {
+    Status = STATUS_UNSUCCESSFUL;
+  }
+  
+  return Status;
 }
 
 /* EOF */