MiUpdateAwePageTable

NTSTATUS __stdcall MiUpdateAwePageTable(UINT64 a1, INT64 a2, INT64 a3){
  int v3; 
  __int64 v6; 
  NTSTATUS v7; 
  __int64 v8; 
  unsigned __int64 v9; 
  _MMPFN *v10; 
  VOID *v11; 
  int v12; 
  UINT64 SpinCount; 

  v3 = a3;
  v6 = (_QWORD)MmGetPteBase() << 25;
  v7 = 0;
  v8 = (((__int64)((a1 << 25) - v6) >> 16 << 25) - v6) >> 16;
  if( a2 )
  {
    v9 = *(_QWORD *)a1;
    MiPteInShadowRange(a1);
    v10 = &MmGetPfnDb()[(v9 >> 12) & 0xFFFFFFFFFi64];
    LODWORD(SpinCount) = 0;
    while( _interlockedbittestandset64((volatile signed __int32 *)&v10->u2, 0x3Fui64) )
    {
      do
        KeYieldProcessorEx(&SpinCount);
      while( v10->u2._bf_0 < 0 );
    }
    v10->u2._bf_0 ^= (v10->u2._bf_0 ^ (v10->u2._bf_0 + a2)) & 0x3FFFFFFFFFFFFFFFi64;
    _InterlockedAnd64(&v10->u2.Lock, 0x7FFFFFFFFFFFFFFFui64);
  }
  if( (_MMPTE *)a1 == MmGetPxeSelfRef() || !v3 )
    return 0;
  LODWORD(v11) = MiGetUsedPtesHandle((PSLIST_ENTRY)v8);
  if( v3 <= 0 )
  {
    LOWORD(v12) = MiDecreaseUsedPtesCount(v11, (unsigned int)-v3);
    if( !v12 )
      return 1;
  }
  else
  {
    MiIncreaseUsedPtesCount(v11, (VOID *)(unsigned int)v3);
  }
  return v7;
}

Referenced by: