reactos/dll/ntdll/dispatch/dispatch.c

   1 /*
   2  * COPYRIGHT:       See COPYING in the top level directory
   3  * PROJECT:         ReactOS NT Library
   4  * FILE:            dll/ntdll/dispatch/dispatch.c
   5  * PURPOSE:         User-Mode NT Dispatchers
   6  * PROGRAMERS:      Alex Ionescu (alex@relsoft.net)
   7  *                  David Welch <welch@cwcom.net>
   8  */
   9
  10 /* INCLUDES *****************************************************************/
  11
  12 #include <ntdll.h>
  13 #define NDEBUG
  14 #include <debug.h>
  15
  16 typedef NTSTATUS (NTAPI *USER_CALL)(PVOID Argument, ULONG ArgumentLength);
  17
  18 /* FUNCTIONS ****************************************************************/
  19
  20 /*
  21  * @implemented
  22  */
  23 VOID
  24 NTAPI
  25 KiUserExceptionDispatcher(PEXCEPTION_RECORD ExceptionRecord,
  26                           PCONTEXT Context)
  27 {
  28     EXCEPTION_RECORD NestedExceptionRecord;
  29     NTSTATUS Status;
  30
  31     /* Dispatch the exception and check the result */
  32     if (RtlDispatchException(ExceptionRecord, Context))
  33     {
  34         /* Continue executing */
  35         Status = NtContinue(Context, FALSE);
  36     }
  37     else
  38     {
  39         /* Raise an exception */
  40         Status = NtRaiseException(ExceptionRecord, Context, FALSE);
  41     }
  42
  43     /* Setup the Exception record */
  44     NestedExceptionRecord.ExceptionCode = Status;
  45     NestedExceptionRecord.ExceptionFlags = EXCEPTION_NONCONTINUABLE;
  46     NestedExceptionRecord.ExceptionRecord = ExceptionRecord;
  47     NestedExceptionRecord.NumberParameters = Status;
  48
  49     /* Raise the exception */
  50     RtlRaiseException(&NestedExceptionRecord);
  51 }
  52
  53 /*
  54  * @implemented
  55  */
  56 VOID
  57 NTAPI
  58 KiRaiseUserExceptionDispatcher(VOID)
  59 {
  60     EXCEPTION_RECORD ExceptionRecord;
  61
  62     /* Setup the exception record */
  63     ExceptionRecord.ExceptionCode = ((PTEB)NtCurrentTeb())->ExceptionCode;
  64     ExceptionRecord.ExceptionFlags = 0;
  65     ExceptionRecord.ExceptionRecord = NULL;
  66     ExceptionRecord.NumberParameters = 0;
  67
  68     /* Raise the exception */
  69     RtlRaiseException(&ExceptionRecord);
  70 }
  71
  72 /*
  73  * @implemented
  74  */
  75 VOID
  76 NTAPI
  77 KiUserCallbackDispatcher(ULONG Index,
  78                          PVOID Argument,
  79                          ULONG ArgumentLength)
  80 {
  81     /* Return with the result of the callback function */
  82     USER_CALL *KernelCallbackTable = NtCurrentPeb()->KernelCallbackTable;
  83     ZwCallbackReturn(NULL,
  84                      0,
  85                      KernelCallbackTable[Index](Argument, ArgumentLength));
  86 }