还原PoSetPowerState实现

 

POWER_STATE __stdcall PoSetPowerState(PDEVICE_OBJECT DeviceObject, POWER_STATE_TYPE Type, POWER_STATE State)
{
  void *v3; // ecx
  unsigned int v6; // edx
  char *v7; // ecx
  unsigned int v8; // eax
  _DEVOBJ_EXTENSION *devObjExt; // esi
  _POWER_STATE *v10; // edi
  KIRQL v11; // al
  unsigned int v12; // ecx
  int v13; // edx
 
  devObjExt = DeviceObject->DeviceObjectExtension;
  v10 = 0;
  v11 = KfAcquireSpinLock(&PopIrpSerialLock);
  if ( Type == DevicePowerState )
  {
      v10 = (_POWER_STATE *)(((unsigned int)devObjExt->PowerFlags >> 4) & 0xF);
      if ( v10 != State.SystemState )
      {
        v12 = devObjExt->PowerFlags & 0xFFFFFF0F;
        devObjExt->PowerFlags = v12;
        v13 = 16 * (State.DeviceState & 0xF);
        
      }
  }
  else //Type == SystemPowerState
  {
    v10 = (_POWER_STATE *)(devObjExt->PowerFlags & 0xF);
    if ( v10 != State.SystemState )
    {
      v12 = devObjExt->PowerFlags & 0xFFFFFFF0;
      devObjExt->PowerFlags = v12;
      v13 = (_DWORD)State.SystemState & 0xF;
    }
  }
  devObjExt->PowerFlags = v12 | v13;

LABEL_21:
  KfReleaseSpinLock(&PopIrpSerialLock, v11);
  return (POWER_STATE)v10;
}