IoConnectInterruptEx

NTSTATUS __stdcall IoConnectInterruptEx(_IO_CONNECT_INTERRUPT_PARAMETERS *Parameters){
  ULONG Version; 
  NTSTATUS result; 
  KIRQL v4; 
  KIRQL Irql; 
  char v6; 
  __int16 v7; 
  _INTERRUPT_CONNECTION_DATA *v8; 
  unsigned int v9; 
  __int64 v10; 
  KIRQL v11; 
  __int128 v12; 
  __m128i v13; 
  __int128 v14; 
  __int128 v15; 
  int v16; 
  __int64 v18; 
  VOID *v19; 
  _KINTERRUPT *ServiceRoutine; 
  UINT8 *PhysicalDeviceObject; 
  _KINTERRUPT **InterruptObject; 
  PKSPIN_LOCK ServiceContext; 
  PKSPIN_LOCK SpinLock; 
  PKSPIN_LOCK SpinLocka; 
  UINT64 *SynchronizeIrql; 
  UINT64 *SynchronizeIrqla; 
  UINT64 ShareVector; 
  UINT64 ShareVectora; 
  UINT64 FloatingSave; 
  _KINTERRUPT_MODE InterruptMode; 
  _GROUP_AFFINITY *v32; 
  UINT8 v33[16]; 
  int v34; 
  _DWORD v35[23]; 
  _INTERRUPT_CONNECTION_DATA *ConnectionDataOut; 
  __int64 InterruptStructureOut; 

  ConnectionDataOut = 0i64;
  InterruptStructureOut = 0i64;
  if( KeGetCurrentIrql() )
    KeBugCheckEx(0x121u, (PVOID)1, (PVOID)KeGetCurrentIrql(), 0i64, 0i64);
  Version = Parameters->Version;
  switch( Version )
  {
    case 1u:
      goto LABEL_49;
    case 2u:
      LOBYTE(SpinLock) = Parameters->FullySpecified.SynchronizeIrql;
      return IopConnectLineBasedInterrupt(
               Parameters->FullySpecified.PhysicalDeviceObject,
               Parameters->FullySpecified.InterruptObject,
               (UINT8 *)Parameters->FullySpecified.ServiceRoutine,
               (_KINTERRUPT *)Parameters->FullySpecified.ServiceContext,
               Parameters->FullySpecified.SpinLock,
               SpinLock,
               SynchronizeIrql,
               ShareVector,
               FloatingSave);
    case 3u:
      goto LABEL_5;
    case 4u:
LABEL_49:
      if( !Parameters->FullySpecified.PhysicalDeviceObject )
        return -1073741811;
      if( !Parameters->FullySpecified.ServiceRoutine )
        return -1073741811;
      v4 = Parameters->FullySpecified.SynchronizeIrql;
      Irql = Parameters->FullySpecified.Irql;
      if( v4 < Irql )
        return -1073741811;
      if( v4 || Irql )
      {
        v6 = 0;
      }
      else
      {
        v6 = 1;
        if( Parameters->FullySpecified.SpinLock )
          return -1073741811;
      }
      if( Version == 4 )
        v7 = Parameters[1].Version;
      else
        v7 = 0;
      if( IopGetInterruptConnectionData(Parameters->FullySpecified.PhysicalDeviceObject, &ConnectionDataOut) >= 0 )
      {
        memset(v35, 0i64, sizeof(v35));
        v8 = ConnectionDataOut;
        v9 = 0;
        v34 = 0;
        if( ConnectionDataOut->Count )
        {
          while( 1 )
          {
            v10 = v9;
            if( ConnectionDataOut->Vectors[v10].Vector == Parameters->FullySpecified.Vector )
            {
              v11 = Parameters->FullySpecified.Irql;
              if( (ConnectionDataOut->Vectors[v10].Irql == v11 || !v11)
                && ConnectionDataOut->Vectors[v10].Mode == Parameters->FullySpecified.InterruptMode
                && ConnectionDataOut->Vectors[v10].TargetProcessors.Group == v7
                && ConnectionDataOut->Vectors[v10].TargetProcessors.Mask == *((_QWORD *)&Parameters->MessageBased + 7) )
              {
                break;
              }
            }
            if( ++v9 >= ConnectionDataOut->Count )
              goto LABEL_42;
          }
          v34 = 1;
          v12 = *(_OWORD *)&ConnectionDataOut->Vectors[v9].TargetProcessors.Group;
          v13 = *(__m128i *)&ConnectionDataOut->Vectors[v9].Type;
          *(_OWORD *)&v35[5] = *(_OWORD *)&ConnectionDataOut->Vectors[v9].Mode;
          v14 = *(_OWORD *)&ConnectionDataOut->Vectors[v9].IntRemapInfo.u.MessageAddressLow;
          *(_OWORD *)&v35[9] = v12;
          v15 = *(_OWORD *)&ConnectionDataOut->Vectors[v9].HvDeviceId;
          *(_OWORD *)&v35[13] = v14;
          *(_QWORD *)&v14 = *((_QWORD *)&ConnectionDataOut->Vectors[v9].MessageRequest + 1);
          *(__m128i *)&v35[1] = v13;
          *(_QWORD *)&v35[21] = v14;
          *(_OWORD *)&v35[17] = v15;
          if( !_mm_cvtsi128_si32(v13) && (v35[16] & 1) != 0 )
            Parameters->FullySpecified.ShareVector = 1;
          LODWORD(SpinLock) = 0;
          v16 = IopConnectInterrupt(
                  (PIO_INTERRUPT_STRUCTURE *)&InterruptStructureOut,
                  (PKSERVICE_ROUTINE)Parameters->FullySpecified.PhysicalDeviceObject,
                  Parameters->MessageBased.MessageServiceRoutine,
                  0i64,
                  (UINT32)Parameters->FullySpecified.ServiceContext,
                  SpinLock,
                  (_KIRQL)Parameters->FullySpecified.SpinLock,
                  Parameters->FullySpecified.SynchronizeIrql,
                  Parameters->FullySpecified.ShareVector,
                  InterruptMode);
          if( v16 >= 0 )
            *Parameters->FullySpecified.InterruptObject = (PKINTERRUPT)(InterruptStructureOut + 112);
          ExFreePoolWithTag(v8, 0);
          return v16;
        }
LABEL_42:
        ExFreePoolWithTag(ConnectionDataOut, 0);
        return -1073741637;
      }
      if( v6 )
        return -1073741637;
      v18 = *((_QWORD *)&Parameters->MessageBased + 7);
      v19 = Parameters->FullySpecified.ServiceContext;
      ServiceRoutine = (_KINTERRUPT *)Parameters->FullySpecified.ServiceRoutine;
      PhysicalDeviceObject = (UINT8 *)Parameters->FullySpecified.PhysicalDeviceObject;
      InterruptObject = Parameters->FullySpecified.InterruptObject;
      *(_QWORD *)&v33[8] = 0i64;
      *(_QWORD *)v33 = v18;
      LOBYTE(InterruptMode) = Parameters->FullySpecified.ShareVector;
      LODWORD(FloatingSave) = Parameters->FullySpecified.InterruptMode;
      LOBYTE(ShareVector) = Parameters->FullySpecified.SynchronizeIrql;
      LOBYTE(SynchronizeIrql) = Parameters->FullySpecified.Irql;
      LODWORD(SpinLock) = Parameters->FullySpecified.Vector;
      ServiceContext = Parameters->FullySpecified.SpinLock;
      *(_WORD *)&v33[8] = v7;
      return IopConnectInterruptFullySpecified(
               InterruptObject,
               PhysicalDeviceObject,
               ServiceRoutine,
               v19,
               ServiceContext,
               SpinLock,
               (UINT64)SynchronizeIrql,
               ShareVector,
               FloatingSave,
               InterruptMode,
               (UINT8)v33,
               v32,
               v18);
  }
  if( Version != 5 )
  {
    Parameters->Version = 3;
    return -1073741637;
  }
LABEL_5:
  LOBYTE(SynchronizeIrql) = Parameters->FullySpecified.SynchronizeIrql;
  result = IopConnectMessageBasedInterrupt(
             Version,
             Parameters->FullySpecified.PhysicalDeviceObject,
             Parameters->MessageBased.ConnectionContext.InterruptMessageTable,
             Parameters->MessageBased.MessageServiceRoutine,
             Parameters->FullySpecified.ServiceContext,
             Parameters->FullySpecified.SpinLock,
             (_KIRQL)SynchronizeIrql,
             ShareVector);
  if( result < 0 )
  {
    if( Parameters->MessageBased.FallBackServiceRoutine )
    {
      LOBYTE(SpinLocka) = Parameters->FullySpecified.SynchronizeIrql;
      v16 = IopConnectLineBasedInterrupt(
              Parameters->FullySpecified.PhysicalDeviceObject,
              Parameters->FullySpecified.InterruptObject,
              (UINT8 *)Parameters->MessageBased.FallBackServiceRoutine,
              (_KINTERRUPT *)Parameters->FullySpecified.ServiceContext,
              Parameters->FullySpecified.SpinLock,
              SpinLocka,
              SynchronizeIrqla,
              ShareVectora,
              FloatingSave);
      Parameters->Version = 2;
      return v16;
    }
    return -1073741637;
  }
  return result;
}

Referenced by: