MiGetPageFromSlabAllocator

INT64 __fastcall MiGetPageFromSlabAllocator(INT64 a1){
  KIRQL v3; 
  INT64 v4; 
  unsigned __int64 v5; 
  INT64 PageFromSlabEntry; 
  INT64 v7; 
  UINT8 *v8; 
  volatile signed __int64 *v9; 
  unsigned __int64 v10; 
  __int64 v11; 
  _QWORD *v12; 
  _QWORD *v13; 
  _QWORD *v14; 
  if( !(*(_QWORD *)(a1 + 32) + *(_QWORD *)(a1 + 64)) )
    return -1i64;
  v3 = ExAcquireSpinLockShared((PEX_SPIN_LOCK)(a1 + 16));
  v4 = *(_QWORD *)(a1 + 24);
  v5 = v3;
  if( !v4 )
    goto LABEL_9;
  PageFromSlabEntry = MiGetPageFromSlabEntry(v4, a1);
  if( PageFromSlabEntry == -1 )
  {
    *(_QWORD *)(a1 + 24) = 0i64;
LABEL_9:
    v11 = *(_QWORD *)(a1 + 8);
    if( (v11 & 1) != 0 )
    {
      if( v11 != 1 )
      {
        v12 = (_QWORD *)(v11 ^ (a1 | 1));
        goto LABEL_13;
      }
    }
    else
    {
      v12 = *(_QWORD **)(a1 + 8);
LABEL_13:
      while( v12 )
      {
        PageFromSlabEntry = MiGetPageFromSlabEntry((INT64)v12, a1);
        if( PageFromSlabEntry != -1 )
        {
          *(_QWORD *)(a1 + 24) = v12;
          goto LABEL_5;
        }
        v13 = (_QWORD *)v12[1];
        v14 = v12;
        if( v13 )
        {
          do
          {
            v12 = v13;
            v13 = (_QWORD *)*v13;
          }
          while( v13 );
        }
        else
        {
          while( 1 )
          {
            v12 = (_QWORD *)(v12[2] & 0xFFFFFFFFFFFFFFFCui64);
            if( !v12 || (_QWORD *)*v12 == v14 )
              break;
            v14 = v12;
          }
        }
      }
    }
    PageFromSlabEntry = -1i64;
  }
LABEL_5:
  ExReleaseSpinLockSharedFromDpcLevel((PEX_SPIN_LOCK)(a1 + 16));
  __writecr8(v5);
  if( PageFromSlabEntry == -1 )
    return MiGetSlabStandbyPage(a1, v7, v8);
  v9 = (volatile signed __int64 *)((char *)MmGetPfnDb() + 48 * PageFromSlabEntry);
  v10 = (unsigned __int8)MiLockPageInline((INT64)v9);
  MiUpdateSlabPagePlaceholderState(a1, PageFromSlabEntry, 1i64, 0i64);
  _InterlockedAnd64(v9 + 3, 0x7FFFFFFFFFFFFFFFui64);
  __writecr8(v10);
  return PageFromSlabEntry;
}

Referenced by: