From 9eef39549af65084fc6974e30fe57592721fb6b5 Mon Sep 17 00:00:00 2001
From: Cloudy <52116030+xdCloudy@users.noreply.github.com>
Date: Wed, 15 Jul 2026 22:35:18 +0100
Subject: [PATCH] hle: implement offline NP reachability state (#238)

---
 src/SharpEmu.Libs/Np/NpManagerExports.cs | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/src/SharpEmu.Libs/Np/NpManagerExports.cs b/src/SharpEmu.Libs/Np/NpManagerExports.cs
index 184de019..f4e6c088 100644
--- a/src/SharpEmu.Libs/Np/NpManagerExports.cs
+++ b/src/SharpEmu.Libs/Np/NpManagerExports.cs
@@ -10,6 +10,7 @@ public static class NpManagerExports
 {
     private const int NpTitleIdSize = 16;
     private const int NpTitleSecretSize = 128;
+    private const int NpReachabilityStateUnavailable = 0;
 
     [SysAbiExport(
         Nid = "3Zl8BePTh9Y",
@@ -75,8 +76,15 @@ public static class NpManagerExports
         LibraryName = "libSceNpManager")]
     public static int NpGetNpReachabilityState(CpuContext ctx)
     {
-        ctx[CpuRegister.Rax] = 0;
-        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+        var stateAddress = ctx[CpuRegister.Rsi];
+        if (stateAddress == 0)
+        {
+            return ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
+        }
+
+        return ctx.TryWriteInt32(stateAddress, NpReachabilityStateUnavailable)
+            ? ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_OK)
+            : ctx.SetReturn(OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
     }
 
     [SysAbiExport(