A dozen changes; new HLEs, AV fixes, ELF loader fixes, new return codes, etc.

src/SharpEmu.HLE/HleDataSymbols.cs

@@ -0,0 +1,130 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using System.Runtime.InteropServices;
+using System.Text;
+
+namespace SharpEmu.HLE;
+
+public static class HleDataSymbols
+{
+    private const string StackChkGuardNid = "f7uOxY9mM1U";
+    private const string ProgNameNid = "djxxOmW6-aw";
+    private const string LibcNeedFlagNid = "P330P3dFF68";
+    private const string LibcInternalNeedFlagNid = "ZT4ODD2Ts9o";
+    private const int ProgNameMaxBytes = 511;
+    private const ulong StackChkGuardValue = 0xC0DEC0DECAFEBABEUL;
+
+    private static readonly object _gate = new();
+    private static readonly nint _stackChkGuardAddress = Allocate(sizeof(ulong) * 2);
+    private static readonly nint _progNameBufferAddress = Allocate(ProgNameMaxBytes + 1);
+    private static readonly nint _progNamePointerAddress = Allocate(nint.Size);
+    private static readonly nint _libcNeedFlagAddress = Allocate(sizeof(uint));
+    private static readonly nint _libcInternalNeedFlagAddress = Allocate(sizeof(uint));
+
+    static HleDataSymbols()
+    {
+        if (_stackChkGuardAddress != 0)
+        {
+            Marshal.WriteInt64(_stackChkGuardAddress, unchecked((long)StackChkGuardValue));
+            Marshal.WriteInt64(
+                IntPtr.Add(_stackChkGuardAddress, sizeof(ulong)),
+                unchecked((long)StackChkGuardValue));
+        }
+
+        if (_libcNeedFlagAddress != 0)
+        {
+            Marshal.WriteInt32(_libcNeedFlagAddress, 1);
+        }
+
+        if (_libcInternalNeedFlagAddress != 0)
+        {
+            Marshal.WriteInt32(_libcInternalNeedFlagAddress, 1);
+        }
+
+        ConfigureProcessImageName("eboot.bin");
+    }
+
+    public static IEnumerable<string> EnumerateKnownNids()
+    {
+        yield return StackChkGuardNid;
+        yield return ProgNameNid;
+        yield return LibcNeedFlagNid;
+        yield return LibcInternalNeedFlagNid;
+    }
+
+    public static void ConfigureProcessImageName(string? processImageName)
+    {
+        var effectiveName = string.IsNullOrWhiteSpace(processImageName)
+            ? "eboot.bin"
+            : processImageName;
+        var encodedName = Encoding.UTF8.GetBytes(effectiveName);
+        var byteCount = Math.Min(encodedName.Length, ProgNameMaxBytes);
+
+        lock (_gate)
+        {
+            if (_progNameBufferAddress == 0 || _progNamePointerAddress == 0)
+            {
+                return;
+            }
+
+            for (var i = 0; i <= ProgNameMaxBytes; i++)
+            {
+                Marshal.WriteByte(_progNameBufferAddress, i, 0);
+            }
+
+            Marshal.Copy(encodedName, 0, _progNameBufferAddress, byteCount);
+            WritePointer(_progNamePointerAddress, _progNameBufferAddress);
+        }
+    }
+
+    public static bool TryGetAddress(string nid, out ulong address)
+    {
+        var pointer = nid switch
+        {
+            StackChkGuardNid => _stackChkGuardAddress,
+            ProgNameNid => _progNamePointerAddress,
+            LibcNeedFlagNid => _libcNeedFlagAddress,
+            LibcInternalNeedFlagNid => _libcInternalNeedFlagAddress,
+            _ => 0,
+        };
+
+        if (pointer == 0)
+        {
+            address = 0;
+            return false;
+        }
+
+        address = unchecked((ulong)pointer);
+        return true;
+    }
+
+    private static nint Allocate(int size)
+    {
+        try
+        {
+            var memory = Marshal.AllocHGlobal(size);
+            for (var i = 0; i < size; i++)
+            {
+                Marshal.WriteByte(memory, i, 0);
+            }
+
+            return memory;
+        }
+        catch
+        {
+            return 0;
+        }
+    }
+
+    private static void WritePointer(nint target, nint value)
+    {
+        if (nint.Size == sizeof(int))
+        {
+            Marshal.WriteInt32(target, value.ToInt32());
+            return;
+        }
+
+        Marshal.WriteInt64(target, value.ToInt64());
+    }
+}

src/SharpEmu.HLE/IModuleManager.cs

@@ -17,5 +17,7 @@ public interface IModuleManager
 
     bool TryGetExportByName(string exportName, out ExportedFunction export);
 
+    bool TryDispatch(string nid, CpuContext context, out OrbisGen2Result result);
+
     OrbisGen2Result Dispatch(string nid, CpuContext context);
 }

src/SharpEmu.HLE/ModuleManager.cs

@@ -93,6 +93,12 @@ public sealed class ModuleManager : IModuleManager
     }
 
     public OrbisGen2Result Dispatch(string nid, CpuContext context)
+    {
+        TryDispatch(nid, context, out var result);
+        return result;
+    }
+
+    public bool TryDispatch(string nid, CpuContext context, out OrbisGen2Result result)
     {
         ArgumentException.ThrowIfNullOrWhiteSpace(nid);
         ArgumentNullException.ThrowIfNull(context);
@@ -100,13 +106,15 @@ public sealed class ModuleManager : IModuleManager
         if (!_dispatchTable.TryGetValue(nid, out var function) || !_exportTable.TryGetValue(nid, out var export))
         {
             context[CpuRegister.Rax] = unchecked((ulong)(int)OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND);
-            return OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
+            result = OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
+            return false;
         }
 
         if ((export.Target & context.TargetGeneration) == 0)
         {
             context[CpuRegister.Rax] = unchecked((ulong)(int)OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND);
-            return OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
+            result = OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
+            return false;
         }
 
         context.ClearRaxWriteFlag();
@@ -117,7 +125,8 @@ public sealed class ModuleManager : IModuleManager
             context[CpuRegister.Rax] = unchecked((ulong)ret);
         }
 
-        return (OrbisGen2Result)ret;
+        result = (OrbisGen2Result)ret;
+        return true;
     }
 
     private static Delegate CreateHandler(Type ownerType, MethodInfo method, IDictionary<Type, object> instances)

src/SharpEmu.HLE/OrbisGen2Result.cs

@@ -45,6 +45,11 @@ public enum OrbisGen2Result : int
     /// </summary>
     ORBIS_GEN2_ERROR_BUSY = unchecked((int)0x80020010),
 
+    /// <summary>
+    /// Indicates that the operation should be retried later.
+    /// </summary>
+    ORBIS_GEN2_ERROR_TRY_AGAIN = unchecked((int)0x80020023),
+
     /// <summary>
     /// Indicates that behavior is recognized but not implemented yet.
     /// </summary>