MiGetFileHashPage

NTSTATUS __stdcall MiGetFileHashPage(_MMPAGING_FILE *PagingFile, UINT64 Color){
  _MI_PARTITION *Partition; 
  unsigned __int64 v3; 
  unsigned int v4; 
  int v5; 
  UINT64 v6; 
  NTSTATUS v7; 
  _DWORD *v8; 
  void *v9; 
  unsigned __int64 v10; 
  struct _KPRCB *CurrentPrcb; 
  __int64 CachedResidentAvailable; 
  bool v14; 
  signed __int32 v15; 
  UINT8 OldIrql; 

  Partition = PagingFile->Partition;
  v3 = 1i64;
  v4 = Color;
  OldIrql = 0;
  MiAcquireNonPagedResources(Partition, 1ui64);
  if( v5 >= 0 )
  {
    LODWORD(v6) = MiGetPage((ULONG_PTR *)&Partition->Core.PartitionId, v4, 0x200ui64);
    v7 = v6;
    if( v6 == -1i64 )
    {
      MiReturnCommit(Partition, 1ui64);
      if( Partition != &Irp )
        goto LABEL_21;
      CurrentPrcb = KeGetCurrentPrcb();
      CachedResidentAvailable = (int)CurrentPrcb->CachedResidentAvailable;
      if( (_DWORD)CachedResidentAvailable == -1 )
        goto LABEL_21;
      if( (unsigned __int64)(CachedResidentAvailable + 1) <= 0x100 )
      {
        do
        {
          v15 = _InterlockedCompareExchange(
                  (volatile signed __int32 *)&CurrentPrcb->CachedResidentAvailable,
                  CachedResidentAvailable + 1,
                  CachedResidentAvailable);
          v14 = (_DWORD)CachedResidentAvailable == v15;
          LODWORD(CachedResidentAvailable) = v15;
          if( v14 )
            return v7;
        }
        while( v15 != -1 && (unsigned __int64)(v15 + 1i64) <= 0x100 );
      }
      if( (int)CachedResidentAvailable > 192
        && (_DWORD)CachedResidentAvailable != -1
        && (_DWORD)CachedResidentAvailable == _InterlockedCompareExchange(
                                                (volatile signed __int32 *)&CurrentPrcb->CachedResidentAvailable,
                                                192,
                                                CachedResidentAvailable) )
      {
        v3 = (int)CachedResidentAvailable - 192 + 1i64;
      }
      if( v3 )
LABEL_21:
        _InterlockedExchangeAdd64((volatile signed __int64 *)&Partition->Vp.ResidentAvailablePages, v3);
    }
    else
    {
      v8 = MiMapPageInHyperSpaceWorker(v6, &OldIrql, 0x80000000ui64);
      v9 = v8;
      v10 = 1024i64;
      if( ((unsigned __int8)v8 & 4) != 0 )
      {
        *v8 = 0;
        v9 = v8 + 1;
        v10 = 1023i64;
      }
      memset(v9, 0, 8 * (v10 >> 1));
      if( (v10 & 1) != 0 )
        *((_DWORD *)v9 + v10 - 1) = 0;
      MiUnmapPageInHyperSpaceWorker(v8, OldIrql, 0x80000000ui64);
      _InterlockedAdd64((_QWORD *)&stru_140C4DB30 + 839, 1ui64);
    }
    return v7;
  }
  return -1;
}

Referenced by: