MiMapContiguousMemory

VOID *__stdcall MiMapContiguousMemory(
        LARGE_INTEGER PhysicalAddress,
        UINT64 NumberOfBytes,
        UINT64 ProtectionMask,
        UINT64 GuardPte){
  char v4; 
  unsigned int v5; 
  LARGE_INTEGER v7; 
  UINT64 v8; 
  void *v9; 
  unsigned int v10; 
  int v11; 
  INT64 v12; 
  int v13; 
  void *v14; 
  CHAR v15; 
  CHAR v17; 
  CHAR v18; 
  unsigned __int64 v19; 
  int v20; 
  int *a5; 
  int a6; 
  int v23; 
  INT64 a3; 
  __int64 v25; 
  UINT64 v26; 
  INT64 a1[5]; 
  int v28; 
  int v29; 
  unsigned __int64 v30; 
  v26 = NumberOfBytes;
  v4 = GuardPte;
  v5 = ProtectionMask;
  if( (_DWORD)ProtectionMask == -1 )
    return 0i64;
  if( (_DWORD)ProtectionMask == 24 )
    return 0i64;
  if( (ProtectionMask & 5) == 5 )
    return 0i64;
  if( (ProtectionMask & 0xFFFFFFF8) == 16 )
    return 0i64;
  v7.QuadPart = NumberOfBytes + PhysicalAddress.QuadPart;
  if( v7.QuadPart <= (unsigned __int64)PhysicalAddress.QuadPart )
  {
    if( v7.QuadPart )
      return 0i64;
  }
  v25 = PhysicalAddress.LowPart & 0xFFF;
  v8 = (v25 + NumberOfBytes + 4095) >> 12;
  v9 = (void *)(((unsigned __int64)PhysicalAddress.QuadPart >> 12) & 0xFFFFFFFFFi64);
  if( (unsigned __int64)PhysicalAddress.QuadPart >> 12 < 0x1000000000i64 )
    v9 = (void *)((unsigned __int64)PhysicalAddress.QuadPart >> 12);
  a3 = (INT64)v9;
  if( (ProtectionMask & 2) != 0 && (MiFlags & 0x10000) != 0 )
    v5 = ProtectionMask & 0xFFFFFFFD;
  a6 = 0;
  if( (PhysicalAddress.LowPart & 0x1FFFFF) != 0
    || NumberOfBytes < 0x200000
    || (v11 = GuardPte & 1, (GuardPte & 1) != 0)
    || (a5 = &a6,
        (v14 = (void *)MiMapContiguousMemoryLarge(v9, ((PhysicalAddress.LowPart & 0xFFF) + NumberOfBytes + 4095) >> 12)) == 0i64) )
  {
    v23 = 0;
    v10 = v8;
    v11 = v4 & 1;
    if( (v4 & 1) != 0 )
    {
      v10 = v8 + 1;
      if( (_DWORD)v8 == -1 )
        return 0i64;
      v23 = 1;
    }
    v12 = MiReservePtes((INT64)&qword_140C4EC80, v10);
    if( v12 )
    {
      v13 = v23 | 2;
      if( (v4 & 2) == 0 )
        v13 = v23;
      LODWORD(a5) = v13;
      if( (int)MiFillSystemPtes(v12, v8, a3, v5, (INT64)a5, (INT64)&a6) >= 0 )
      {
        v14 = (void *)(v25 + (((v12 << 25) - ((_QWORD)MmGetPteBase() << 25)) >> 16));
        goto LABEL_16;
      }
      MiReleasePtes((INT64)&qword_140C4EC80, v12, v10);
    }
    return 0i64;
  }
LABEL_16:
  v15 = a6 & 1;
  if( (a6 & 1) != 0 )
    MiMappingHasIoReferences(v14);
  if( (dword_140CFA17C & 1) != 0 )
  {
    a1[0] = 0i64;
    a1[1] = 0i64;
    v28 = 0;
    v17 = v15 | 2;
    v30 = (unsigned __int64)PhysicalAddress.QuadPart >> 12;
    v18 = 1;
    a1[3] = (INT64)v14;
    v19 = PhysicalAddress.QuadPart & 0xFFFFFFFFFFFFF000ui64;
    v20 = PhysicalAddress.LowPart & 0xFFF;
    a1[4] = v19;
    a1[2] = v26;
    if( !v11 )
      v17 = v15;
    v29 = v20;
    if( v5 >> 3 == 1 )
    {
      v18 = 0;
    }
    else if( v5 >> 3 == 3 && (v5 & 7) != 0 )
    {
      v18 = 2;
    }
    MiInsertPteTracker((INT64)a1, 1i64, v17, v18);
  }
  return v14;
}

Referenced by: