reactos/ntoskrnl/ke/i386/usercall.c

   1 /* $Id: usercall.c,v 1.27 2004/07/01 01:52:37 royce 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 #define NTOS_MODE_KERNEL
  15 #include <ntos.h>
  16 #include <internal/ntoskrnl.h>
  17 #include <internal/ke.h>
  18 #include <internal/ps.h>
  19 #include <internal/i386/segment.h>
  20 #include <internal/i386/mm.h>
  21
  22 #define NDEBUG
  23 #include <internal/debug.h>
  24
  25 #include <internal/ps.h>
  26
  27 /* FUNCTIONS *****************************************************************/
  28
  29 VOID
  30 KiSystemCallHook(ULONG Nr, ...)
  31 {
  32 #if 0
  33    va_list ap;
  34    ULONG i;
  35
  36    va_start(ap, Nr);
  37
  38    DbgPrint("%x/%d ", KeServiceDescriptorTable[0].SSDT[Nr].SysCallPtr, Nr);
  39    DbgPrint("%x (", KeServiceDescriptorTable[0].SSPT[Nr].ParamBytes);
  40    for (i = 0; i < KeServiceDescriptorTable[0].SSPT[Nr].ParamBytes / 4; i++)
  41      {
  42         DbgPrint("%x, ", va_arg(ap, ULONG));
  43      }
  44    DbgPrint(")\n");
  45    assert_irql(PASSIVE_LEVEL);
  46    va_end(ap);
  47 #endif
  48 }
  49
  50 VOID
  51 KiAfterSystemCallHook(PKTRAP_FRAME TrapFrame)
  52 {
  53   if (KeGetCurrentThread()->Alerted[1] != 0 && TrapFrame->Cs != KERNEL_CS)
  54     {
  55       KiDeliverNormalApc();
  56     }
  57   if (KeGetCurrentThread()->Alerted[0] != 0 && TrapFrame->Cs != KERNEL_CS)
  58     {
  59       KiDeliverUserApc(TrapFrame);
  60     }
  61 }
  62
  63
  64 VOID
  65 KiServiceCheck (ULONG Nr)
  66 {
  67   PETHREAD Thread;
  68
  69   Thread = PsGetCurrentThread();
  70
  71 #if 0
  72   DbgPrint ("KiServiceCheck(%p) called\n", Thread);
  73   DbgPrint ("Service %d (%p)\n", Nr, KeServiceDescriptorTableShadow[1].SSDT[Nr].SysCallPtr);
  74 #endif
  75
  76   if (Thread->Tcb.ServiceTable != KeServiceDescriptorTableShadow)
  77     {
  78 #if 0
  79       DbgPrint ("Initialize Win32 thread\n");
  80 #endif
  81
  82       PsInitWin32Thread (Thread);
  83
  84       Thread->Tcb.ServiceTable = KeServiceDescriptorTableShadow;
  85     }
  86 }
  87
  88 // This function should be used by win32k.sys to add its own user32/gdi32 services
  89 // TableIndex is 0 based
  90 // ServiceCountTable its not used at the moment
  91 /*
  92  * @implemented
  93  */
  94 BOOLEAN STDCALL
  95 KeAddSystemServiceTable (
  96         PSSDT   SSDT,
  97         PULONG  ServiceCounterTable,
  98         ULONG   NumberOfServices,
  99         PSSPT   SSPT,
 100         ULONG   TableIndex
 101         )
 102 {
 103     if (TableIndex > SSDT_MAX_ENTRIES - 1)
 104         return FALSE;
 105
 106     /* check if descriptor table entry is free */
 107     if ((KeServiceDescriptorTable[TableIndex].SSDT != NULL) ||
 108         (KeServiceDescriptorTableShadow[TableIndex].SSDT != NULL))
 109         return FALSE;
 110
 111     /* initialize the shadow service descriptor table */
 112     KeServiceDescriptorTableShadow[TableIndex].SSDT = SSDT;
 113     KeServiceDescriptorTableShadow[TableIndex].SSPT = SSPT;
 114     KeServiceDescriptorTableShadow[TableIndex].NumberOfServices = NumberOfServices;
 115     KeServiceDescriptorTableShadow[TableIndex].ServiceCounterTable = ServiceCounterTable;
 116
 117     /* initialize the service descriptor table (not for win32k services) */
 118     if (TableIndex != 1)
 119     {
 120         KeServiceDescriptorTable[TableIndex].SSDT = SSDT;
 121         KeServiceDescriptorTable[TableIndex].SSPT = SSPT;
 122         KeServiceDescriptorTable[TableIndex].NumberOfServices = NumberOfServices;
 123         KeServiceDescriptorTable[TableIndex].ServiceCounterTable = ServiceCounterTable;
 124     }
 125
 126     return TRUE;
 127 }
 128
 129 /*
 130  * @unimplemented
 131  */
 132 STDCALL
 133 BOOLEAN
 134 KeRemoveSystemServiceTable(
 135     IN PUCHAR Number
 136 )
 137 {
 138         UNIMPLEMENTED;
 139         return FALSE;
 140 }
 141
 142 /*
 143  * @unimplemented
 144  */
 145 STDCALL
 146 NTSTATUS
 147 KeUserModeCallback(
 148     IN ULONG    FunctionID,
 149     IN PVOID    InputBuffer,
 150     IN ULONG    InputLength,
 151     OUT PVOID   *OutputBuffer,
 152     OUT PULONG  OutputLength
 153 )
 154 {
 155         UNIMPLEMENTED;
 156         return 0;
 157 }
 158
 159 /* EOF */