Working on a BSD-Style syscall wrapper.

src/SVM.Advanced/BSDStyleVM/BSDLikeWrapper.cs

@@ -0,0 +1,53 @@
+using SVM.Core;
+using System;
+using System.Collections.Generic;
+using System.IO;
+
+namespace SVM.Advanced.BSDStyleVM
+{
+	public class BSDLikeWrapper
+	{
+		public SimpleVirtualMachine baseVM;
+		public Dictionary<int, FileDescripter> FDs = new Dictionary<int, FileDescripter>();
+		public BSDLikeWrapper(SimpleVirtualMachine baseVM)
+		{
+			this.baseVM = baseVM;
+			baseVM.AdditionalData = this;
+			baseVM.Config = BSDConfig.CreateConfig();
+		}
+	}
+	public class BSDConfig
+	{
+		public static SVMConfig CreateConfig()
+		{
+			var config = new SVMConfig();
+			config.PCRegisterID = 1;
+			config.SPRegisterID = 2;
+
+			SetupSyscall(config);
+			return config;
+		}
+		public static void SetupSyscall(SVMConfig config)
+		{
+			config.FuncCalls.Add(1, BSDStyleFunctions0.__exit);
+		}
+	}
+	public static class BSDStyleFunctions0
+	{
+		public static void __exit(SimpleVirtualMachine machine)
+		{
+			var status = machine.registers.GetData<int>(10);
+			Console.WriteLine("Bye-bye!");
+			Environment.Exit(status);
+		}
+	}
+	public class FileDescripter
+	{
+		public Stream stream;
+
+		public FileDescripter(Stream stream)
+		{
+			this.stream = stream;
+		}
+	}
+}

src/SVM.Advanced/SVM.Advanced.csproj

@@ -0,0 +1,12 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netstandard2.1</TargetFramework>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\SVM.Core\SVM.Core.csproj" />
+  </ItemGroup>
+
+</Project>

src/SVM.Assembler/ISA.xml

@@ -73,5 +73,21 @@
 				</InstructionParameter>
 			</Parameters>
 		</InstructionDefinition>
+		<InstructionDefinition PrimaryInstruction="System" InstructionCount="1">
+			<Aliases>
+				<Alias Name="system"/>
+				<Alias Name="sys"/>
+				<Alias Name="syscall"/>
+			</Aliases>
+			<Parameters>
+				<InstructionParameter>
+					<MatchingItems>
+						<Item Id="Number"/>
+						<Item Id="Word"/>
+					</MatchingItems>
+					<ExpectedValue Type="Int32" Pos="4" Converter="Integer32" />
+				</InstructionParameter>
+			</Parameters>
+		</InstructionDefinition>
 	</Definitions>
 </ISARoot>

src/SVM.Core/SimpleVirtualMachine.cs

@@ -25,6 +25,8 @@ namespace SVM.Core
 		public MState MachineState;
 		public SVMProgram* Program = null;
 		public static uint InitGPMemorySize = 696320;
+		public Object? AdditionalData = null;
+		public ErrorIDs ErrorIDs = new ErrorIDs();
 		public void Init(uint StackSize = 1024 * 1024, uint RegisterSize = 512, uint GPMemory = uint.MaxValue)
 		{
 			registers.Init(RegisterSize);
@@ -181,11 +183,19 @@ namespace SVM.Core
 					case PrimaryInstruction.System:
 						if (Config != null)
 						{
-							var target = Instruction.GetData<uint>(1);
+							var target = Instruction.GetData<uint>(4);
 							if (Config.FuncCalls.TryGetValue(target, out var func))
 							{
 								func(this);
 							}
+							else
+							{
+								registers.SetData((int)ErrorIDOffset,ErrorIDs.SyscallCallNotExist);
+							}
+						}
+						else
+						{
+							registers.SetData((int)ErrorIDOffset, ErrorIDs.SyscallCallNotExist);
 						}
 						break;
 					case PrimaryInstruction.SIMD:
@@ -359,6 +369,11 @@ namespace SVM.Core
 		/// </summary>
 		public uint EIDRegisterID;
 	}
+	public class ErrorIDs
+	{
+		public int SyscallCallNotExist = 1;
+		public int MAX_ERROR_ID = short.MaxValue;
+	}
 	public delegate void FuncCall(SimpleVirtualMachine machine);
 	[StructLayout(LayoutKind.Sequential)]
 	public struct MState

src/SVM.Standalone/Program.cs

@@ -1,4 +1,5 @@
-using SVM.Core;
+using SVM.Advanced.BSDStyleVM;
+using SVM.Core;
 
 namespace SVM.Standalone;
 
@@ -25,10 +26,10 @@ class Program
 		{
 			Program = program
 		};
+		BSDLikeWrapper wrapper = new BSDLikeWrapper(svm);
 		svm.Init();
 		while (!svm.isReachBinaryEnd())
 		{
-			Console.WriteLine("Step");
 			svm.Step();
 		}
 	}

src/SVM.Standalone/SVM.Standalone.csproj

@@ -1,6 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <ItemGroup>
+    <ProjectReference Include="..\SVM.Advanced\SVM.Advanced.csproj" />
     <ProjectReference Include="..\SVM.Core\SVM.Core.csproj" />
   </ItemGroup>
 

src/SVM.sln

@@ -11,6 +11,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SVM.Assembler.Core", "SVM.A
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SVM.Assembler", "SVM.Assembler\SVM.Assembler.csproj", "{E2B82455-3947-4C11-82D0-178E8D8C3D64}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SVM.Advanced", "SVM.Advanced\SVM.Advanced.csproj", "{F9F2F699-49F7-4427-BA22-B444DD6259FD}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -69,6 +71,18 @@ Global
 		{E2B82455-3947-4C11-82D0-178E8D8C3D64}.Release|x64.Build.0 = Release|Any CPU
 		{E2B82455-3947-4C11-82D0-178E8D8C3D64}.Release|x86.ActiveCfg = Release|Any CPU
 		{E2B82455-3947-4C11-82D0-178E8D8C3D64}.Release|x86.Build.0 = Release|Any CPU
+		{F9F2F699-49F7-4427-BA22-B444DD6259FD}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{F9F2F699-49F7-4427-BA22-B444DD6259FD}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{F9F2F699-49F7-4427-BA22-B444DD6259FD}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{F9F2F699-49F7-4427-BA22-B444DD6259FD}.Debug|x64.Build.0 = Debug|Any CPU
+		{F9F2F699-49F7-4427-BA22-B444DD6259FD}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{F9F2F699-49F7-4427-BA22-B444DD6259FD}.Debug|x86.Build.0 = Debug|Any CPU
+		{F9F2F699-49F7-4427-BA22-B444DD6259FD}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{F9F2F699-49F7-4427-BA22-B444DD6259FD}.Release|Any CPU.Build.0 = Release|Any CPU
+		{F9F2F699-49F7-4427-BA22-B444DD6259FD}.Release|x64.ActiveCfg = Release|Any CPU
+		{F9F2F699-49F7-4427-BA22-B444DD6259FD}.Release|x64.Build.0 = Release|Any CPU
+		{F9F2F699-49F7-4427-BA22-B444DD6259FD}.Release|x86.ActiveCfg = Release|Any CPU
+		{F9F2F699-49F7-4427-BA22-B444DD6259FD}.Release|x86.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE