ViAllocateMapRegisterFile

_MAP_REGISTER_FILE *__stdcall ViAllocateMapRegisterFile(
        _ADAPTER_INFORMATION *AdapterInformation,
        UINT64 NumberOfMapRegisters){
  unsigned int v3; 
  UINT64 v4; 
  VOID **PoolWithTag; 
  VOID **v6; 
  _MDL *Mdl; 
  VOID **v8; 
  _MDL *v9; 
  VOID **v10; 
  VOID *v11; 
  __int64 v12; 
  VOID **v13; 
  unsigned __int64 v14; 
  VOID *v15; 
  int v17; 
  PVOID *v18; 
  void *v19; 
  UINT64 v20; 
  UINT64 Priority; 

  v3 = NumberOfMapRegisters;
  if( (unsigned int)(NumberOfMapRegisters + AdapterInformation[40]) <= 0x20 )
  {
    if( (_DWORD)NumberOfMapRegisters )
    {
      v4 = (unsigned int)(32 * (NumberOfMapRegisters - 1) + 120);
      PoolWithTag = ExAllocatePoolWithTag(0x200ui64, v4, 1449943368i64);
      v6 = PoolWithTag;
      if( PoolWithTag )
      {
        memset(PoolWithTag, 0i64, v4);
        *((_DWORD *)v6 + 7) = v3;
        Mdl = IoAllocateMdl(0i64, v3 << 12, 0, 0, 0i64);
        if( Mdl )
        {
          v8 = ExAllocatePoolWithTag(0x200ui64, (unsigned __int64)v3 << 12, 1449943368i64);
          v6[9] = v8;
          if( v8 )
          {
            v9 = Mdl + 1;
            v10 = v6 + 13;
            do
            {
              v11 = ViAllocateFromContiguousMemory(AdapterInformation, *((_DWORD *)v6 + 7) - v3);
              *v10 = v11;
              if( v11 )
              {
                v12 = 78i64;
              }
              else
              {
                v13 = ExAllocatePoolWithTag(0x204ui64, 0x3000ui64, 1449943368i64);
                *v10 = v13;
                if( !v13 )
                  goto LABEL_14;
                v12 = 79i64;
              }
              _InterlockedIncrement(&AdapterInformation[v12]);
              ViInitializePadding(*v10, 0x3000ui64, 0i64, 0i64);
              LODWORD(v14) = MmGetPhysicalAddress((UINT64)*v10 + 4096);
              v10 += 4;
              v9->Next = (_MDL *)(v14 >> 12);
              v9 = (_MDL *)((char *)v9 + 8);
              --v3;
            }
            while( v3 );
            Mdl->MdlFlags |= 2u;
            LODWORD(Priority) = 1073741840;
            LODWORD(v20) = 0;
            v15 = MmMapLockedPagesSpecifyCache(Mdl, 0, MmCached, 0i64, v20, Priority);
            v6[8] = v15;
            if( v15 )
            {
              v6[10] = 0i64;
              v6[7] = Mdl;
              *(_DWORD *)v6 = -1393569779;
              ExInterlockedInsertHeadList(
                (PLIST_ENTRY)(AdapterInformation + 26),
                (PLIST_ENTRY)(v6 + 1),
                (PKSPIN_LOCK)AdapterInformation + 15);
              return(_MAP_REGISTER_FILE *)v6;
            }
          }
        }
LABEL_14:
        v17 = *((_DWORD *)v6 + 7);
        if( v17 )
        {
          v18 = v6 + 13;
          do
          {
            if( !*v18 )
              break;
            if( !(unsigned int)ViFreeToContiguousMemory(
                                  AdapterInformation,
                                  *v18,
                                  (unsigned int)(*((_DWORD *)v6 + 7) - v17)) )
              ExFreePoolWithTag(*v18, 0);
            v18 += 4;
            --v17;
          }
          while( v17 );
        }
        if( Mdl )
          IoFreeMdl(Mdl);
        v19 = v6[9];
        if( v19 )
          ExFreePoolWithTag(v19, 0);
        ExFreePoolWithTag(v6, 0);
      }
    }
  }
  return 0i64;
}

Referenced by: