From 697ad7be80dab3316ecbe0a5c528f61c240e45e1 Mon Sep 17 00:00:00 2001
From: ParantezTech <parantezprojects@gmail.com>
Date: Mon, 29 Jun 2026 14:31:37 +0300
Subject: [PATCH] [libs] Add NP entitlement validation

---
 .../Np/NpEntitlementAccessExports.cs          | 51 +++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 src/SharpEmu.Libs/Np/NpEntitlementAccessExports.cs

diff --git a/src/SharpEmu.Libs/Np/NpEntitlementAccessExports.cs b/src/SharpEmu.Libs/Np/NpEntitlementAccessExports.cs
new file mode 100644
index 0000000..f6387ca
--- /dev/null
+++ b/src/SharpEmu.Libs/Np/NpEntitlementAccessExports.cs
@@ -0,0 +1,51 @@
+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using SharpEmu.HLE;
+
+namespace SharpEmu.Libs.Np;
+
+public static class NpEntitlementAccessExports
+{
+    private const int BootParamClearSize = 0x20;
+
+    [SysAbiExport(
+        Nid = "jO8DM8oyego",
+        ExportName = "sceNpEntitlementAccessInitialize",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libSceNpEntitlementAccess")]
+    public static int NpEntitlementAccessInitialize(CpuContext ctx)
+    {
+        var initParam = ctx[CpuRegister.Rdi];
+        var bootParam = ctx[CpuRegister.Rsi];
+
+        if (bootParam != 0)
+        {
+            Span<byte> clear = stackalloc byte[BootParamClearSize];
+            clear.Clear();
+            if (!ctx.Memory.TryWrite(bootParam, clear))
+            {
+                return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
+            }
+        }
+
+        TraceNpEntitlementAccess($"initialize init=0x{initParam:X16} boot=0x{bootParam:X16}");
+        return SetReturn(ctx, OrbisGen2Result.ORBIS_GEN2_OK);
+    }
+
+    private static int SetReturn(CpuContext ctx, OrbisGen2Result result)
+    {
+        ctx[CpuRegister.Rax] = unchecked((ulong)(int)result);
+        return (int)result;
+    }
+
+    private static void TraceNpEntitlementAccess(string message)
+    {
+        if (!string.Equals(Environment.GetEnvironmentVariable("SHARPEMU_LOG_NP"), "1", StringComparison.Ordinal))
+        {
+            return;
+        }
+
+        Console.Error.WriteLine($"[LOADER][TRACE] np.entitlement.{message}");
+    }
+}