[REACTX] Fix 64 bit issues
[reactos.git] / ntoskrnl / ps / win32.c
1 /*
2 * PROJECT: ReactOS Kernel
3 * LICENSE: GPL - See COPYING in the top level directory
4 * FILE: ntoskrnl/ps/win32.c
5 * PURPOSE: Process Manager: Win32K Initialization and Support
6 * PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
7 */
8
9 /* INCLUDES ****************************************************************/
10
11 #include <ntoskrnl.h>
12 #include <winerror.h>
13 #define NDEBUG
14 #include <debug.h>
15
16 /* GLOBALS ******************************************************************/
17
18 PKWIN32_PROCESS_CALLOUT PspW32ProcessCallout = NULL;
19 PKWIN32_THREAD_CALLOUT PspW32ThreadCallout = NULL;
20 PGDI_BATCHFLUSH_ROUTINE KeGdiFlushUserBatch = NULL;
21 extern PKWIN32_SESSION_CALLOUT ExpWindowStationObjectParse;
22 extern PKWIN32_SESSION_CALLOUT ExpWindowStationObjectDelete;
23 extern PKWIN32_SESSION_CALLOUT ExpWindowStationObjectOkToClose;
24 extern PKWIN32_SESSION_CALLOUT ExpDesktopObjectOkToClose;
25 extern PKWIN32_SESSION_CALLOUT ExpDesktopObjectDelete;
26 extern PKWIN32_SESSION_CALLOUT ExpDesktopObjectOpen;
27 extern PKWIN32_SESSION_CALLOUT ExpDesktopObjectClose;
28 extern PKWIN32_POWEREVENT_CALLOUT PopEventCallout;
29
30 /* PRIVATE FUNCTIONS *********************************************************/
31
32 NTSTATUS
33 NTAPI
34 PsConvertToGuiThread(VOID)
35 {
36 ULONG_PTR NewStack;
37 PVOID OldStack;
38 PETHREAD Thread = PsGetCurrentThread();
39 PEPROCESS Process = PsGetCurrentProcess();
40 NTSTATUS Status;
41 PAGED_CODE();
42
43 /* Validate the previous mode */
44 if (KeGetPreviousMode() == KernelMode) return STATUS_INVALID_PARAMETER;
45
46 /* If no win32k, crashes later */
47 ASSERT(PspW32ProcessCallout != NULL);
48
49 /* Make sure win32k is here */
50 if (!PspW32ProcessCallout) return STATUS_ACCESS_DENIED;
51
52 /* Make sure it's not already win32 */
53 if (Thread->Tcb.ServiceTable != KeServiceDescriptorTable)
54 {
55 /* We're already a win32 thread */
56 return STATUS_ALREADY_WIN32;
57 }
58
59 /* Check if we don't already have a kernel-mode stack */
60 if (!Thread->Tcb.LargeStack)
61 {
62 /* We don't create one */
63 NewStack = (ULONG_PTR)MmCreateKernelStack(TRUE, 0);
64 if (!NewStack)
65 {
66 /* Panic in user-mode */
67 NtCurrentTeb()->LastErrorValue = ERROR_NOT_ENOUGH_MEMORY;
68 return STATUS_NO_MEMORY;
69 }
70
71 /* We're about to switch stacks. Enter a guarded region */
72 KeEnterGuardedRegion();
73
74 /* Switch stacks */
75 OldStack = KeSwitchKernelStack((PVOID)NewStack,
76 (PVOID)(NewStack - KERNEL_STACK_SIZE));
77
78 /* Leave the guarded region */
79 KeLeaveGuardedRegion();
80
81 /* Delete the old stack */
82 MmDeleteKernelStack(OldStack, FALSE);
83 }
84
85 /* Always do the process callout! */
86 Status = PspW32ProcessCallout(Process, TRUE);
87 if (!NT_SUCCESS(Status)) return Status;
88
89 /* Set the new service table */
90 Thread->Tcb.ServiceTable = KeServiceDescriptorTableShadow;
91 ASSERT(Thread->Tcb.Win32Thread == 0);
92
93 /* Tell Win32k about our thread */
94 Status = PspW32ThreadCallout(Thread, PsW32ThreadCalloutInitialize);
95 if (!NT_SUCCESS(Status))
96 {
97 /* Revert our table */
98 Thread->Tcb.ServiceTable = KeServiceDescriptorTable;
99 }
100
101 /* Return status */
102 return Status;
103 }
104
105 /* PUBLIC FUNCTIONS **********************************************************/
106
107 /*
108 * @implemented
109 */
110 VOID
111 NTAPI
112 PsEstablishWin32Callouts(IN PWIN32_CALLOUTS_FPNS CalloutData)
113 {
114 /* Setup the callback pointers */
115 PspW32ProcessCallout = CalloutData->ProcessCallout;
116 PspW32ThreadCallout = CalloutData->ThreadCallout;
117 ExpWindowStationObjectParse = CalloutData->WindowStationParseProcedure;
118 ExpWindowStationObjectDelete = CalloutData->WindowStationDeleteProcedure;
119 ExpWindowStationObjectOkToClose = CalloutData->WindowStationOkToCloseProcedure;
120 ExpDesktopObjectOkToClose = CalloutData->DesktopOkToCloseProcedure;
121 ExpDesktopObjectDelete = CalloutData->DesktopDeleteProcedure;
122 ExpDesktopObjectOpen = CalloutData->DesktopOpenProcedure;
123 ExpDesktopObjectClose = CalloutData->DesktopCloseProcedure;
124 PopEventCallout = CalloutData->PowerEventCallout;
125 KeGdiFlushUserBatch = CalloutData->BatchFlushRoutine;
126 }
127
128 /* EOF */