[ns] add stubs for cmd936 and cmd4042 (#4429)

- [x] I have read and followed the [Contribution Guidelines](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/CONTRIBUTING.md#code-contributions).
- [x] I have read and followed the [AI Policy](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/docs/policies/AI.md)
- [x] I have read and followed the [Coding Guidelines](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/docs/policies/Coding.md) to the best of my ability.

-------------------
This is necessary to close Absolum and Hades 2 in qlaunch.

Cmd4042 is necessary that there are no freezes when opening virtual cartridges.

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4429
Reviewed-by: lizzie <lizzie@eden-emu.dev>
Reviewed-by: Maufeat <sahyno1996@gmail.com>

src/core/CMakeLists.txt

@@ -810,6 +810,8 @@ add_library(core STATIC
     hle/service/ns/ecommerce_interface.h
     hle/service/ns/factory_reset_interface.cpp
     hle/service/ns/factory_reset_interface.h
+    hle/service/ns/i_async_result.cpp
+    hle/service/ns/i_async_result.h
     hle/service/ns/language.cpp
     hle/service/ns/language.h
     hle/service/ns/ns.cpp

src/core/hle/service/ns/application_manager_interface.cpp

@@ -228,9 +228,9 @@ IApplicationManagerInterface::IApplicationManagerInterface(Core::System& system_
         {930, nullptr, "Unknown930"}, //20.0.0+
         {931, nullptr, "Unknown931"}, //20.0.0+
         {933, nullptr, "Unknown933"}, //20.0.0+
-        {934, nullptr, "Unknown934"}, //20.0.0+
+        {934, nullptr, "Unknown934"}, //21.0.0+
-        {935, nullptr, "Unknown935"}, //20.0.0+
+        {935, nullptr, "Unknown935"}, //21.0.0+
-        {936, nullptr, "Unknown936"}, //20.0.0+
+        {936, D<&IApplicationManagerInterface::Unknown936>, "Unknown936"}, //21.0.0+
         {1000, nullptr, "RequestVerifyApplicationDeprecated"},
         {1001, nullptr, "CorruptApplicationForDebug"},
         {1002, nullptr, "RequestVerifyAddOnContentsRights"},
@@ -422,7 +422,7 @@ IApplicationManagerInterface::IApplicationManagerInterface(Core::System& system_
         {4039, nullptr, "Unknown4039"}, //20.0.0+
         {4040, nullptr, "Unknown4040"}, //20.0.0+
         {4041, nullptr, "Unknown4041"}, //20.0.0+
-        {4042, nullptr, "Unknown4042"}, //20.0.0+
+        {4042, D<&IApplicationManagerInterface::Unknown4042>, "Unknown4042"}, //20.0.0+
         {4043, nullptr, "Unknown4043"}, //20.0.0+
         {4044, nullptr, "Unknown4044"}, //20.0.0+
         {4045, nullptr, "Unknown4045"}, //20.0.0+
@@ -639,6 +639,12 @@ Result IApplicationManagerInterface::IsGameCardApplicationRunning(Out<bool> out_
     R_SUCCEED();
 }
 
+Result IApplicationManagerInterface::Unknown936(Out<u64> out_result) {
+    LOG_WARNING(Service_NS, "(STUBBED) called.");
+    *out_result = 0;
+    R_SUCCEED();
+}
+
 Result IApplicationManagerInterface::IsAnyApplicationEntityInstalled(
     Out<bool> out_is_any_application_entity_installed) {
     LOG_WARNING(Service_NS, "(STUBBED) called");
@@ -862,6 +868,15 @@ Result IApplicationManagerInterface::Unknown4023(Out<u64> out_result) {
     R_SUCCEED();
 }
 
+Result IApplicationManagerInterface::Unknown4042(OutInterface<IAsyncResult> out_interface,
+                                                 OutCopyHandle<Kernel::KReadableEvent> out_event,
+                                                 u64 arg1, u64 arg2) {
+    LOG_WARNING(Service_NS, "(STUBBED) called, arg1={:016X}, arg2={:016X}", arg1, arg2);
+    *out_event = unknown_event.GetHandle();
+    *out_interface = std::make_shared<IAsyncResult>(system, &unknown_event);
+    R_SUCCEED();
+}
+
 Result IApplicationManagerInterface::Unknown4053() {
     LOG_WARNING(Service_NS, "(STUBBED) called.");
     R_SUCCEED();

src/core/hle/service/ns/application_manager_interface.h

@@ -7,6 +7,7 @@
 #pragma once
 
 #include "core/hle/service/cmif_types.h"
+#include "core/hle/service/ns/i_async_result.h"
 #include "core/hle/service/ns/language.h"
 #include "core/hle/service/ns/ns_types.h"
 #include "core/hle/service/os/event.h"
@@ -34,6 +35,7 @@ public:
     Result GetGameCardMountFailureEvent(OutCopyHandle<Kernel::KReadableEvent> out_event);
     Result GetGameCardWakenReadyEvent(OutCopyHandle<Kernel::KReadableEvent> out_event);
     Result IsGameCardApplicationRunning(Out<bool> out_is_running);
+    Result Unknown936(Out<u64> out_result);
     Result IsAnyApplicationEntityInstalled(Out<bool> out_is_any_application_entity_installed);
     Result GetApplicationViewDeprecated(
         OutArray<ApplicationViewV19, BufferAttr_HipcMapAlias> out_application_views,
@@ -71,6 +73,9 @@ public:
                                   InBuffer<BufferAttr_HipcMapAlias> logo_path_buffer);
     Result Unknown4022(OutCopyHandle<Kernel::KReadableEvent> out_event);
     Result Unknown4023(Out<u64> out_result);
+    Result Unknown4042(OutInterface<IAsyncResult> out_interface,
+                       OutCopyHandle<Kernel::KReadableEvent> out_event,
+                       u64 arg1, u64 arg2);
     Result Unknown4053();
     Result Unknown4105();
 

src/core/hle/service/ns/i_async_result.cpp

@@ -0,0 +1,35 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "core/hle/service/cmif_serialization.h"
+#include "core/hle/service/ns/i_async_result.h"
+
+#include <cstring>
+
+namespace Service::NS {
+
+IAsyncResult::IAsyncResult(Core::System& system_, Service::Event* event_)
+    : ServiceFramework{system_, "nn::ns::detail::IAsyncResult"}, event{event_} {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {0, nullptr, "Get"},
+        {1, D<&IAsyncResult::Cancel>, "Cancel"},
+        {2, nullptr, "GetErrorContext"}, // 4.0.0+
+    };
+    // clang-format on
+
+    RegisterHandlers(functions);
+}
+
+IAsyncResult::~IAsyncResult() = default;
+
+Result IAsyncResult::Cancel() {
+    LOG_DEBUG(Service_NS, "called");
+    if (event != nullptr) {
+        event->Signal(system.Kernel());
+    }
+
+    R_SUCCEED();
+}
+
+} // namespace Service::NS

src/core/hle/service/ns/i_async_result.h

@@ -0,0 +1,19 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "core/hle/service/service.h"
+
+namespace Service::NS {
+
+class IAsyncResult final : public ServiceFramework<IAsyncResult> {
+public:
+    explicit IAsyncResult(Core::System& system_, Service::Event* event_);
+    ~IAsyncResult() override;
+
+private:
+    Result Cancel();
+
+    Service::Event* event{};
+};
+
+} // namespace Service::NS