MiInsertUnusedSubsection

NTSTATUS __stdcall MiInsertUnusedSubsection(_MSUBSECTION *MappedSubsection, UINT64 InsertTail){
  int v2; 
  __int64 PtesInSubsection; 
  unsigned __int64 v5; 
  __int64 v6; 
  unsigned __int64 v7; 
  unsigned __int64 v8; 
  int v9; 
  NTSTATUS v10; 
  _LIST_ENTRY *p_DereferenceList; 
  _LIST_ENTRY *v12; 
  _LIST_ENTRY *v14; 
  int v15; 

  v2 = 0;
  PtesInSubsection = MappedSubsection->Core.PtesInSubsection;
  v5 = 8 * PtesInSubsection;
  v6 = *(_QWORD *)(*(&stru_140C4DB30 + 267) + 8i64 * (MappedSubsection->Core.ControlArea->u1.Flags._bf_0 & 0x3FF));
  if( (unsigned __int64)(8 * PtesInSubsection) > 0xFE0 )
  {
    if( v5 >= 0x10000 || ((8 * (_WORD)PtesInSubsection) & 0xFFFu) > 0xFC0 )
    {
      v8 = (v5 + 4095) & 0xFFFFFFFFFFFFF000ui64;
      goto LABEL_4;
    }
    v7 = v5 + 15;
  }
  else
  {
    v7 = v5 + 31;
  }
  v8 = v7 & 0xFFFFFFFFFFFFFFF0ui64;
LABEL_4:
  ExAcquireSpinLockExclusiveAtDpcLevel((INT64 *)(v6 + 1344));
  MappedSubsection->Core.u.SubsectionFlags._bf_2 |= 8u;
  *(_QWORD *)(v6 + 1696) += v8;
  _InterlockedExchangeAdd64(&qword_140C4C6D8, v8);
  LOBYTE(v9) = MiControlAreaUsingExtents((INT64)MappedSubsection->Core.ControlArea);
  v10 = 0;
  if( !v9 && (MappedSubsection->Core.u1.e1._bf_0 & 0x3FFFFFFF) != 0 )
  {
    MiUpdateSubsectionCrossPartitionRefs(MappedSubsection, 0);
    v10 = MappedSubsection->Core.PtesInSubsection - (v15 & MappedSubsection->Core._bf_34);
  }
  p_DereferenceList = &MappedSubsection->DereferenceList;
  if( MappedSubsection->NumberOfPfnReferences )
  {
    v12 = *(_LIST_ENTRY **)(v6 + 1728);
    if( v12->Flink == (_LIST_ENTRY *)(v6 + 1720) )
    {
      p_DereferenceList->Flink = (_LIST_ENTRY *)(v6 + 1720);
      MappedSubsection->DereferenceList.Blink = v12;
      v12->Flink = p_DereferenceList;
      *(_QWORD *)(v6 + 1728) = p_DereferenceList;
      goto LABEL_10;
    }
LABEL_21:
    __fastfail(3u);
  }
  v14 = *(_LIST_ENTRY **)(v6 + 1744);
  if( v14->Flink != (_LIST_ENTRY *)(v6 + 1736) )
    goto LABEL_21;
  p_DereferenceList->Flink = (_LIST_ENTRY *)(v6 + 1736);
  MappedSubsection->DereferenceList.Blink = v14;
  v14->Flink = p_DereferenceList;
  *(_QWORD *)(v6 + 1744) = p_DereferenceList;
  *(_QWORD *)(v6 + 1424) += PtesInSubsection;
  if( *(_QWORD *)(v6 + 1424) >= 0x20000ui64 )
    v2 = 1;
LABEL_10:
  ExReleaseSpinLockExclusiveFromDpcLevel((INT64 *)(v6 + 1344));
  if( v2 == 1 )
    KeSetEvent((PRKEVENT)(v6 + 1376), 0, 0);
  return v10;
}

Referenced by: