reactos/ntoskrnl/ke/i386/usercall.c

   1 /* $Id: usercall.c,v 1.20 2001/03/16 18:11:23 dwelch 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 <ddk/ntddk.h>
  15 #include <internal/ntoskrnl.h>
  16 #include <internal/ke.h>
  17 #include <internal/ps.h>
  18 #include <internal/i386/segment.h>
  19 #include <internal/i386/mm.h>
  20
  21 #define NDEBUG
  22 #include <internal/debug.h>
  23 #include <ddk/service.h>
  24
  25 #include <ddk/defines.h>
  26 #include <internal/ps.h>
  27
  28 /* FUNCTIONS *****************************************************************/
  29
  30 VOID 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 ULONG KiAfterSystemCallHook(ULONG NtStatus, PKTRAP_FRAME TrapFrame)
  51 {
  52   if (KeGetCurrentThread()->Alerted[1] != 0 && TrapFrame->Cs != KERNEL_CS)
  53     {
  54       KiDeliverNormalApc();
  55     }
  56   if (KeGetCurrentThread()->Alerted[0] != 0 && TrapFrame->Cs != KERNEL_CS)
  57     {
  58       KiDeliverUserApc(TrapFrame);
  59     }
  60   return(NtStatus);
  61 }
  62
  63 // This function should be used by win32k.sys to add its own user32/gdi32 services
  64 // TableIndex is 0 based
  65 // ServiceCountTable its not used at the moment
  66 BOOLEAN STDCALL
  67 KeAddSystemServiceTable (
  68         PSSDT   SSDT,
  69         PULONG  ServiceCounterTable,
  70         ULONG   NumberOfServices,
  71         PSSPT   SSPT,
  72         ULONG   TableIndex
  73         )
  74 {
  75     if (TableIndex > SSDT_MAX_ENTRIES - 1)
  76         return FALSE;
  77
  78     /* check if descriptor table entry is free */
  79     if ((KeServiceDescriptorTable[TableIndex].SSDT != NULL) ||
  80         (KeServiceDescriptorTableShadow[TableIndex].SSDT != NULL))
  81         return FALSE;
  82
  83     /* initialize the shadow service descriptor table */
  84     KeServiceDescriptorTableShadow[TableIndex].SSDT = SSDT;
  85     KeServiceDescriptorTableShadow[TableIndex].SSPT = SSPT;
  86     KeServiceDescriptorTableShadow[TableIndex].NumberOfServices = NumberOfServices;
  87     KeServiceDescriptorTableShadow[TableIndex].ServiceCounterTable = ServiceCounterTable;
  88
  89     /* initialize the service descriptor table (not for win32k services) */
  90     if (TableIndex != 1)
  91     {
  92         KeServiceDescriptorTable[TableIndex].SSDT = SSDT;
  93         KeServiceDescriptorTable[TableIndex].SSPT = SSPT;
  94         KeServiceDescriptorTable[TableIndex].NumberOfServices = NumberOfServices;
  95         KeServiceDescriptorTable[TableIndex].ServiceCounterTable = ServiceCounterTable;
  96     }
  97
  98     return TRUE;
  99 }
 100
 101 /* EOF */