RtlInitializeExtendedContext2

__int64 __fastcall RtlInitializeExtendedContext2(__int64 a1, int a2, _QWORD *a3, unsigned __int64 a4){
  _DWORD *v4; 
  unsigned __int64 v5; 
  char v7; 
  _DWORD *v8; 
  int v9; 
  __int64 result; 
  size_t v11; 
  unsigned int v12; 
  size_t v13; 

  v4 = 0i64;
  v5 = a4;
  if( (a2 & 0x27FFFF80) != 0x10000
    && (a2 & 0x27FFFFA0) != 0x100000
    && (a2 & 0x7FFFFF0) != 0x200000
    && (a2 & 0x7FFFFE0) != 0x400000 )
  {
    return 3221225485i64;
  }
  v7 = 1;
  if( (a2 & 0x100040) == 1048640 || (a2 & 0x10040) == 65600 )
  {
    if( !KUSER_SHARED_DATA.XState.EnabledFeatures )
      return 3221225659i64;
    v7 = 3;
  }
  if( (a2 & 0x10000) != 0 )
  {
    v8 = (_DWORD *)((a1 + 3) & 0xFFFFFFFFFFFFFFFCui64);
    v4 = v8 + 179;
LABEL_16:
    *v8 = a2;
    goto LABEL_8;
  }
  if( (a2 & 0x100000) == 0 )
  {
    if( (a2 & 0x200000) != 0 )
    {
      v8 = (_DWORD *)((a1 + 7) & 0xFFFFFFFFFFFFFFF8ui64);
      v4 = v8 + 104;
    }
    else
    {
      if( (a2 & 0x400000) == 0 )
        goto LABEL_9;
      v8 = (_DWORD *)((a1 + 15) & 0xFFFFFFFFFFFFFFF0ui64);
      v4 = v8 + 228;
    }
    goto LABEL_16;
  }
  v8 = (_DWORD *)((a1 + 15) & 0xFFFFFFFFFFFFFFF0ui64);
  v8[12] = a2;
  v4 = v8 + 308;
LABEL_8:
  v4[3] = (_DWORD)v4 - (_DWORD)v8;
LABEL_9:
  v9 = v4[3];
  v4[2] = -v9;
  *v4 = -v9;
  v4[1] = v9 + 24;
  if( (a2 & 0x10020) != 65568 && (a2 & 0x10000) != 0 )
    v4[3] = 204;
  if( (v7 & 2) != 0 )
  {
    if( (KUSER_SHARED_DATA.XState._bf_0 & 2) != 0 )
      v5 = (KUSER_SHARED_DATA.XState.EnabledFeatures | KUSER_SHARED_DATA.XState.EnabledUserVisibleSupervisorFeatures | 0x8000000000000000ui64) & a4;
    v11 = RtlpGetEntireXStateAreaLength(v5) - 512;
    memset((VOID *)(((unsigned __int64)v4 + 87) & 0xFFFFFFFFFFFFFFC0ui64), 0i64, v11);
    if( (KUSER_SHARED_DATA.XState._bf_0 & 2) != 0 )
      *(_QWORD *)((((unsigned __int64)v4 + 87) & 0xFFFFFFFFFFFFFFC0ui64) + 8) = v5 | 0x8000000000000000ui64;
    v12 = (((_DWORD)v4 + 87) & 0xFFFFFFC0) - (_DWORD)v4;
    v4[4] = v12;
    v13 = v11 + v12 - *v4;
    v4[5] = v11;
    result = 0i64;
    v4[1] = v13;
    *a3 = v4;
  }
  else
  {
    *((_QWORD *)v4 + 2) = 25i64;
    result = 0i64;
    *a3 = v4;
  }
  return result;
}

Referenced by: