PnpGetDeviceResourcesFromRegistry

__int64 __fastcall PnpGetDeviceResourcesFromRegistry(
        _DEVICE_OBJECT *DeviceObject,
        unsigned int ResourceType,
        unsigned int Preference,
        void **Resource,
        unsigned int *Length){
  UINT64 *v5; 
  char v6; 
  int RegistryValue; 
  HANDLE v10; 
  __int64 v11; 
  __int64 result; 
  NTSTATUS v13; 
  __int64 v14; 
  __int64 v15; 
  NTSTATUS DeviceConfiguration; 
  WCHAR *v17; 
  __int64 v18; 
  unsigned int *v19; 
  unsigned int v20; 
  void *PoolWithTag; 
  _DWORD *v22; 
  void *P[2]; 
  HANDLE Handle; 
  v5 = (UINT64 *)Length;
  v6 = Preference;
  *Resource = 0i64;
  Handle = 0i64;
  RegistryValue = 0;
  *(_DWORD *)v5 = 0;
  P[0] = 0i64;
  if( ResourceType )
  {
    if( DeviceObject )
      v14 = *(_QWORD *)(*((_QWORD *)DeviceObject + 39) + 40i64);
    else
      v14 = 0i64;
    RegistryValue = CmOpenDeviceRegKey(
                      PiPnpRtlCtx,
                      *(const wchar_t **)(v14 + 48),
                      20,
                      0,
                      131097,
                      0,
                      (__int64)&Handle,
                      0i64);
    if( RegistryValue < 0 )
      return(unsigned int)RegistryValue;
    if( (v6 & 1) != 0 )
    {
      v17 = (WCHAR *)L"OverrideConfigVector";
    }
    else
    {
      if( (v6 & 2) == 0 )
      {
LABEL_26:
        v10 = Handle;
        goto LABEL_12;
      }
      v17 = (WCHAR *)L"BasicConfigVector";
    }
    RegistryValue = IopGetRegistryValue(Handle, v17, 0i64, (KEY_VALUE_FULL_INFORMATION **)P);
    if( RegistryValue >= 0 )
    {
      v19 = (unsigned int *)P[0];
      if( *((_DWORD *)P[0] + 1) == 10 )
      {
        v20 = *((_DWORD *)P[0] + 3);
        if( v20 )
        {
          PoolWithTag = ExAllocatePoolWithTag(PagedPool, v20, 0x75737050ui64);
          *Resource = PoolWithTag;
          if( PoolWithTag )
          {
            *(_DWORD *)v5 = v19[3];
            memmove((UINT8 *)*Resource, (UINT8 *)v19 + v19[2], v19[3]);
            v22 = *Resource;
            if( *((_DWORD *)*Resource + 1) == -1 )
            {
              v22[2] = 0;
              v22[1] = 1;
            }
          }
          else
          {
            RegistryValue = -1073741584;
          }
        }
      }
      ExFreePoolWithTag(v19, 0);
    }
    goto LABEL_26;
  }
  if( (Preference & 1) != 0 )
  {
    v18 = DeviceObject ? *(_QWORD *)(*((_QWORD *)DeviceObject + 39) + 40i64) : 0i64;
    RegistryValue = CmOpenDeviceRegKey(
                      PiPnpRtlCtx,
                      *(const wchar_t **)(v18 + 48),
                      19,
                      0,
                      131097,
                      0,
                      (__int64)&Handle,
                      0i64);
    if( RegistryValue >= 0 )
    {
      RegistryValue = PnpReadDeviceConfiguration(Handle, 1ui64, (CM_RESOURCE_LIST **)Resource, v5);
      ZwClose(Handle);
      if( RegistryValue >= 0 )
        return(unsigned int)RegistryValue;
    }
  }
  v10 = 0i64;
  Handle = 0i64;
  if( (v6 & 2) != 0 )
  {
    if( DeviceObject )
      v15 = *(_QWORD *)(*((_QWORD *)DeviceObject + 39) + 40i64);
    else
      v15 = 0i64;
    result = CmOpenDeviceRegKey(PiPnpRtlCtx, *(const wchar_t **)(v15 + 48), 20, 0, 131097, 0, (__int64)&Handle, 0i64);
    if( (int)result < 0 )
      return result;
    DeviceConfiguration = PnpReadDeviceConfiguration(Handle, 2ui64, (CM_RESOURCE_LIST **)Resource, v5);
    v10 = Handle;
    RegistryValue = DeviceConfiguration;
    if( DeviceConfiguration >= 0 )
      goto LABEL_12;
  }
  if( (v6 & 4) == 0 )
    goto LABEL_11;
  if( v10 )
  {
LABEL_10:
    v13 = PnpReadDeviceConfiguration(v10, 4ui64, (CM_RESOURCE_LIST **)Resource, v5);
    v10 = Handle;
    RegistryValue = v13;
LABEL_11:
    if( !v10 )
      return(unsigned int)RegistryValue;
LABEL_12:
    ZwClose(v10);
    return(unsigned int)RegistryValue;
  }
  if( DeviceObject )
    v11 = *(_QWORD *)(*((_QWORD *)DeviceObject + 39) + 40i64);
  else
    v11 = 0i64;
  result = CmOpenDeviceRegKey(PiPnpRtlCtx, *(const wchar_t **)(v11 + 48), 20, 0, 131097, 0, (__int64)&Handle, 0i64);
  if( (int)result >= 0 )
  {
    v10 = Handle;
    goto LABEL_10;
  }
  return result;
}

Referenced by: