ViAllocateMapRegisterFile

CHAR *__fastcall ViAllocateMapRegisterFile(INT64 a1, UINT64 a2){
  unsigned int v3; 
  char *PoolWithTag; 
  char *v5; 
  PMDL Mdl; 
  VOID *v7; 
  struct _MDL *v8; 
  VOID **v9; 
  INT64 v10; 
  __int64 v11; 
  VOID *v12; 
  PHYSICAL_ADDRESS PhysicalAddress; 
  PVOID v14; 
  int v16; 
  PVOID *v17; 
  void *v18; 
  v3 = a2;
  if( (unsigned int)(a2 + *(_DWORD *)(a1 + 160)) <= 0x20 )
  {
    if( (_DWORD)a2 )
    {
      PoolWithTag = (char *)ExAllocatePoolWithTag(NonPagedPoolNx, (unsigned int)(32 * (a2 - 1) + 120), 0x566C6148ui64);
      v5 = PoolWithTag;
      if( PoolWithTag )
      {
        memset((INT64)PoolWithTag, 0i64);
        *((_DWORD *)v5 + 7) = v3;
        Mdl = IoAllocateMdl(0i64, v3 << 12, 0, 0, 0i64);
        if( Mdl )
        {
          v7 = ExAllocatePoolWithTag(NonPagedPoolNx, (unsigned __int64)v3 << 12, 0x566C6148ui64);
          *((_QWORD *)v5 + 9) = v7;
          if( v7 )
          {
            v8 = Mdl + 1;
            v9 = (VOID **)(v5 + 104);
            do
            {
              v10 = ViAllocateFromContiguousMemory(a1, *((_DWORD *)v5 + 7) - v3);
              *v9 = (VOID *)v10;
              if( v10 )
              {
                v11 = 312i64;
              }
              else
              {
                v12 = ExAllocatePoolWithTag(NonPagedPoolNxCacheAligned, 0x3000ui64, 0x566C6148ui64);
                *v9 = v12;
                if( !v12 )
                  goto LABEL_14;
                v11 = 316i64;
              }
              _InterlockedIncrement((volatile signed __int32 *)(v11 + a1));
              ViInitializePadding(*v9, 0x3000ui64, 0i64, 0i64);
              PhysicalAddress = MmGetPhysicalAddress((char *)*v9 + 4096);
              v9 += 4;
              v8->Next = (_MDL *)((unsigned __int64)PhysicalAddress.QuadPart >> 12);
              v8 = (struct _MDL *)((char *)v8 + 8);
              --v3;
            }
            while( v3 );
            Mdl->MdlFlags |= 2u;
            v14 = MmMapLockedPagesSpecifyCache(Mdl, 0, MmCached, 0i64, 0, 0x40000010u);
            *((_QWORD *)v5 + 8) = v14;
            if( v14 )
            {
              *((_QWORD *)v5 + 10) = 0i64;
              *((_QWORD *)v5 + 7) = Mdl;
              *(_DWORD *)v5 = -1393569779;
              ExInterlockedInsertHeadList((PLIST_ENTRY)(a1 + 104), (PLIST_ENTRY)(v5 + 8), (PKSPIN_LOCK)(a1 + 120));
              return v5;
            }
          }
        }
LABEL_14:
        v16 = *((_DWORD *)v5 + 7);
        if( v16 )
        {
          v17 = (PVOID *)(v5 + 104);
          do
          {
            if( !*v17 )
              break;
            if( !(unsigned int)ViFreeToContiguousMemory(a1, (__int64)*v17, *((_DWORD *)v5 + 7) - v16) )
              ExFreePoolWithTag(*v17, 0);
            v17 += 4;
            --v16;
          }
          while( v16 );
        }
        if( Mdl )
          IoFreeMdl(Mdl);
        v18 = (void *)*((_QWORD *)v5 + 9);
        if( v18 )
          ExFreePoolWithTag(v18, 0);
        ExFreePoolWithTag(v5, 0);
      }
    }
  }
  return 0i64;
}

Referenced by: