reactos/ntoskrnl/ke/i386/usercall.c

   1 /* $Id: usercall.c,v 1.28 2004/08/15 16:39:05 chorns Exp $
   2  *
   3  * COPYRIGHT:       See COPYING in the top level directory
   4  * PROJECT:         ReactOS kernel
   5  * FILE:            ntoskrnl/hal/x86/usercall.c
   6  * PURPOSE:         2E interrupt handler
   7  * PROGRAMMER:      David Welch (david.welch@seh.ox.ac.uk)
   8  * UPDATE HISTORY:
   9  *                  ???
  10  */
  11
  12 /* INCLUDES ******************************************************************/
  13
  14 #include <ntoskrnl.h>
  15 #define NDEBUG
  16 #include <internal/debug.h>
  17
  18 /* FUNCTIONS *****************************************************************/
  19
  20 VOID
  21 KiSystemCallHook(ULONG Nr, ...)
  22 {
  23 #if 0
  24    va_list ap;
  25    ULONG i;
  26
  27    va_start(ap, Nr);
  28
  29    DbgPrint("%x/%d ", KeServiceDescriptorTable[0].SSDT[Nr].SysCallPtr, Nr);
  30    DbgPrint("%x (", KeServiceDescriptorTable[0].SSPT[Nr].ParamBytes);
  31    for (i = 0; i < KeServiceDescriptorTable[0].SSPT[Nr].ParamBytes / 4; i++)
  32      {
  33         DbgPrint("%x, ", va_arg(ap, ULONG));
  34      }
  35    DbgPrint(")\n");
  36    assert_irql(PASSIVE_LEVEL);
  37    va_end(ap);
  38 #endif
  39 }
  40
  41 VOID
  42 KiAfterSystemCallHook(PKTRAP_FRAME TrapFrame)
  43 {
  44   if (KeGetCurrentThread()->Alerted[1] != 0 && TrapFrame->Cs != KERNEL_CS)
  45     {
  46       KiDeliverNormalApc();
  47     }
  48   if (KeGetCurrentThread()->Alerted[0] != 0 && TrapFrame->Cs != KERNEL_CS)
  49     {
  50       KiDeliverUserApc(TrapFrame);
  51     }
  52 }
  53
  54
  55 VOID
  56 KiServiceCheck (ULONG Nr)
  57 {
  58   PETHREAD Thread;
  59
  60   Thread = PsGetCurrentThread();
  61
  62 #if 0
  63   DbgPrint ("KiServiceCheck(%p) called\n", Thread);
  64   DbgPrint ("Service %d (%p)\n", Nr, KeServiceDescriptorTableShadow[1].SSDT[Nr].SysCallPtr);
  65 #endif
  66
  67   if (Thread->Tcb.ServiceTable != KeServiceDescriptorTableShadow)
  68     {
  69 #if 0
  70       DbgPrint ("Initialize Win32 thread\n");
  71 #endif
  72
  73       PsInitWin32Thread (Thread);
  74
  75       Thread->Tcb.ServiceTable = KeServiceDescriptorTableShadow;
  76     }
  77 }
  78
  79 // This function should be used by win32k.sys to add its own user32/gdi32 services
  80 // TableIndex is 0 based
  81 // ServiceCountTable its not used at the moment
  82 /*
  83  * @implemented
  84  */
  85 BOOLEAN STDCALL
  86 KeAddSystemServiceTable (
  87         PSSDT   SSDT,
  88         PULONG  ServiceCounterTable,
  89         ULONG   NumberOfServices,
  90         PSSPT   SSPT,
  91         ULONG   TableIndex
  92         )
  93 {
  94     if (TableIndex > SSDT_MAX_ENTRIES - 1)
  95         return FALSE;
  96
  97     /* check if descriptor table entry is free */
  98     if ((KeServiceDescriptorTable[TableIndex].SSDT != NULL) ||
  99         (KeServiceDescriptorTableShadow[TableIndex].SSDT != NULL))
 100         return FALSE;
 101
 102     /* initialize the shadow service descriptor table */
 103     KeServiceDescriptorTableShadow[TableIndex].SSDT = SSDT;
 104     KeServiceDescriptorTableShadow[TableIndex].SSPT = SSPT;
 105     KeServiceDescriptorTableShadow[TableIndex].NumberOfServices = NumberOfServices;
 106     KeServiceDescriptorTableShadow[TableIndex].ServiceCounterTable = ServiceCounterTable;
 107
 108     /* initialize the service descriptor table (not for win32k services) */
 109     if (TableIndex != 1)
 110     {
 111         KeServiceDescriptorTable[TableIndex].SSDT = SSDT;
 112         KeServiceDescriptorTable[TableIndex].SSPT = SSPT;
 113         KeServiceDescriptorTable[TableIndex].NumberOfServices = NumberOfServices;
 114         KeServiceDescriptorTable[TableIndex].ServiceCounterTable = ServiceCounterTable;
 115     }
 116
 117     return TRUE;
 118 }
 119
 120 /*
 121  * @unimplemented
 122  */
 123 STDCALL
 124 BOOLEAN
 125 KeRemoveSystemServiceTable(
 126     IN PUCHAR Number
 127 )
 128 {
 129         UNIMPLEMENTED;
 130         return FALSE;
 131 }
 132
 133 /*
 134  * @unimplemented
 135  */
 136 STDCALL
 137 NTSTATUS
 138 KeUserModeCallback(
 139     IN ULONG    FunctionID,
 140     IN PVOID    InputBuffer,
 141     IN ULONG    InputLength,
 142     OUT PVOID   *OutputBuffer,
 143     OUT PULONG  OutputLength
 144 )
 145 {
 146         UNIMPLEMENTED;
 147         return 0;
 148 }
 149
 150 /* EOF */