[kernel, hle] Initial 22.0.0 kernel changes and cmd stubs (#3761)

- KProcess::Run() and CreateThread() SVC now write the current thread handle to TLS+0x110
- KPageTableBase::LockForMapDeviceAddressSpace now checks for a new KPageTableBase boolean, m_allowed_exec_device_mapping
- Stub `am` + `acc` + `settings` cmd module that needs to work for qlaunch

Thanks to: @alula and @yellows8
Source for changes: https://github.com/Atmosphere-NX/Atmosphere/pull/2744, https://switchbrew.org/, https://yls8.mtheall.com/

Co-authored-by: PavelBARABANOV <pavelbarabanov94@gmail.com>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3761
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>

src/core/hle/service/acc/acc.cpp

@@ -1155,6 +1155,14 @@ void Module::Interface::StoreSaveDataThumbnailSystem(HLERequestContext& ctx) {
     StoreSaveDataThumbnail(ctx, uuid, tid);
 }
 
+void Module::Interface::GetPinCodeLength(HLERequestContext& ctx) {
+    LOG_WARNING(Service_ACC, "(STUBBED) called");
+
+    IPC::ResponseBuilder rb{ctx, 3};
+    rb.Push(ResultSuccess);
+    rb.Push<u32>(0);
+}
+
 void Module::Interface::StoreSaveDataThumbnail(HLERequestContext& ctx, const Common::UUID& uuid,
                                                const u64 tid) {
     IPC::ResponseBuilder rb{ctx, 2};

src/core/hle/service/acc/acc.h

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
@@ -48,6 +48,7 @@ public:
         void StoreSaveDataThumbnailApplication(HLERequestContext& ctx);
         void GetBaasAccountManagerForSystemService(HLERequestContext& ctx);
         void StoreSaveDataThumbnailSystem(HLERequestContext& ctx);
+        void GetPinCodeLength(HLERequestContext& ctx);
 
     private:
         Result InitializeApplicationInfoBase();

src/core/hle/service/acc/acc_su.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
@@ -60,7 +60,7 @@ ACC_SU::ACC_SU(std::shared_ptr<Module> module_, std::shared_ptr<ProfileManager>
         {291, nullptr, "ProxyProcedureForFloatingRegistrationWithNintendoAccount"},
         {299, nullptr, "SuspendBackgroundDaemon"},
         {400, nullptr, "SetPinCode"}, // 18.0.0+
-        {401, nullptr, "GetPinCodeLength"}, // 18.0.0+
+        {401, &ACC_SU::GetPinCodeLength, "GetPinCodeLength"}, // 18.0.0+
         {402, nullptr, "GetPinCode"}, // 18.0.0+
         {410, nullptr, "GetPinCodeErrorCount"}, // 18.0.0+
         {411, nullptr, "ResetPinCodeErrorCount"}, // 18.0.0+

src/core/hle/service/acc/acc_u1.cpp

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -40,7 +43,7 @@ ACC_U1::ACC_U1(std::shared_ptr<Module> module_, std::shared_ptr<ProfileManager>
         {152, nullptr, "LoadSignedDeviceIdentifierCacheForNintendoAccount"},
         {190, nullptr, "GetUserLastOpenedApplication"},
         {191, nullptr, "ActivateOpenContextHolder"},
-        {401, nullptr, "GetPinCodeLength"}, // 18.0.0+
+        {401, &ACC_U1::GetPinCodeLength, "GetPinCodeLength"}, // 18.0.0+
         {402, nullptr, "GetPinCode"}, // 18.0.0+
         {997, nullptr, "DebugInvalidateTokenCacheForUser"},
         {998, nullptr, "DebugSetUserStateClose"},