diff --git a/src/SVM.Advanced/BSDStyleVM/BSDLikeWrapper.cs b/src/SVM.Advanced/BSDStyleVM/BSDLikeWrapper.cs
index badb0ef..c6fcb94 100644
--- a/src/SVM.Advanced/BSDStyleVM/BSDLikeWrapper.cs
+++ b/src/SVM.Advanced/BSDStyleVM/BSDLikeWrapper.cs
@@ -4,6 +4,7 @@ using System;
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.IO;
+using System.Text;
 
 namespace SVM.Advanced.BSDStyleVM
 {
@@ -19,7 +20,15 @@ namespace SVM.Advanced.BSDStyleVM
 			FDs.Add(0, new FileDescripter(Console.OpenStandardInput()));
 			FDs.Add(1, new FileDescripter(Console.OpenStandardOutput()));
 		}
-
+		public int FindAvailableFDID()
+		{
+			for (int i = 0; i < int.MaxValue; i++)
+			{
+				if (FDs.ContainsKey(i)) continue;
+				return i;
+			}
+			return -1;
+		}
 	}
 	public class BSDConfig
 	{
@@ -38,6 +47,13 @@ namespace SVM.Advanced.BSDStyleVM
 			config.FuncCalls.Add(4, BSDStyleFunctions0.__write);
 		}
 	}
+	public static class BSDFcntl
+	{
+		public const int O_RDONLY = 0x0;
+		public const int O_WRONLY = 0x01;
+		public const int O_RDWR = 0x02;
+		public const int O_ACCMODE = 0x03;
+	}
 	public static class BSDStyleFunctions0
 	{
 		public static void __exit(SimpleVirtualMachine machine)
@@ -45,7 +61,32 @@ namespace SVM.Advanced.BSDStyleVM
 			var status = machine.registers.GetData<int>(10);
 			Environment.Exit(status);
 		}
-		public static void __write(SimpleVirtualMachine machine)
+		public unsafe static void __open(SimpleVirtualMachine machine)
+		{
+			if (machine.AdditionalData is BSDLikeWrapper w)
+			{
+				var ptr = machine.registers.GetData<SVMPointer>(10);
+				var size = machine.registers.GetData<ulong>(11);
+				var flag = machine.registers.GetData<int>(12);
+				var fn = Encoding.UTF8.GetString((byte*)machine.GetPointer(ptr), (int)size);
+				FileMode fm = default;
+				FileAccess fa = default;
+				if ((flag & BSDFcntl.O_WRONLY) == BSDFcntl.O_WRONLY)
+				{
+					fa = FileAccess.Write;
+				}
+				var fdID = w.FindAvailableFDID();
+				if (fdID == -1) return;
+				var stream = File.Open(fn, fm, fa);
+				FileDescripter fd = new FileDescripter(stream);
+				w.FDs.Add(fdID, fd);
+			}
+			else
+			{
+				Console.WriteLine("Incorrectly set wrapper!");
+			}
+		}
+		public unsafe static void __write(SimpleVirtualMachine machine)
 		{
 			if (machine.AdditionalData is BSDLikeWrapper w)
 			{
diff --git a/src/SVM.Advanced/SVM.Advanced.csproj b/src/SVM.Advanced/SVM.Advanced.csproj
index 43ba0d5..e1501ac 100644
--- a/src/SVM.Advanced/SVM.Advanced.csproj
+++ b/src/SVM.Advanced/SVM.Advanced.csproj
@@ -3,6 +3,7 @@
   <PropertyGroup>
     <TargetFramework>netstandard2.1</TargetFramework>
     <Nullable>enable</Nullable>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/src/SVM.Assembler.Core/Linker.cs b/src/SVM.Assembler.Core/Linker.cs
index 0f1ed5b..97091fd 100644
--- a/src/SVM.Assembler.Core/Linker.cs
+++ b/src/SVM.Assembler.Core/Linker.cs
@@ -390,6 +390,7 @@ namespace SVM.Assembler.Core
 					}
 					Buffer.BlockCopy(data, 0, data2, sizeof(int), data.Length);
 					context.DataOffsets.Add(item.Key, offset);
+					Data.Add(data2);
 				}
 				else if (item.Value.StartsWith("file:"))
 				{
@@ -404,12 +405,12 @@ namespace SVM.Assembler.Core
 					Buffer.BlockCopy(data, 0, data2, sizeof(int), data.Length);
 					context.DataOffsets.Add(item.Key, offset);
 					offset += (uint)data2.Length;
-					Data.Add(data);
+					Data.Add(data2);
 				}
 				else
 				{
 					byte[] data;
-					string str=Regex.Unescape(item.Value);
+					string str = Regex.Unescape(item.Value);
 					if (str[0] == '\"' && str[^1] == '\"')
 					{
 						data = Encoding.UTF8.GetBytes(str, 1, str.Length - 2);
@@ -417,16 +418,16 @@ namespace SVM.Assembler.Core
 					}
 					else
 						data = Encoding.UTF8.GetBytes(str);
-					byte[] data2 = new byte[data.Length + sizeof(int)];
+					byte[] data2 = new byte[data.Length + sizeof(int) + sizeof(char)];
 					fixed (byte* ptr = data2)
 					{
-						int len = data.Length;
+						int len = data.Length + sizeof(char);
 						((IntPtr)ptr).SetData(len);
 					}
 					Buffer.BlockCopy(data, 0, data2, sizeof(int), data.Length);
 					context.DataOffsets.Add(item.Key, offset);
 					offset += (uint)data2.Length;
-					Data.Add(data);
+					Data.Add(data2);
 				}
 			}
 			foreach (var item in Obj.instructions)
diff --git a/src/SVM.Assembler.Core/LinkingContext.cs b/src/SVM.Assembler.Core/LinkingContext.cs
index 54a4d60..bb42598 100644
--- a/src/SVM.Assembler.Core/LinkingContext.cs
+++ b/src/SVM.Assembler.Core/LinkingContext.cs
@@ -20,7 +20,8 @@ namespace SVM.Assembler.Core
 		{
 			if (DataOffsets.TryGetValue(label, out offset))
 			{
-				offset += (uint)IntermediateObject.DetermineFinalInstructionCount(this) * (uint)sizeof(SVMInstruction);
+				//Don't directly give the length there.
+				offset += (uint)IntermediateObject.DetermineFinalInstructionCount(this) * (uint)sizeof(SVMInstruction)+sizeof(int);
 				return true;
 			}
 			return false;