[fs, qlaunch] add CreateSaveDataFileSystemWithCreationInfo2 and make qlaunch work again (#2760)

Fixes qlaunch regression I introduced previously. Add a few known structs.
Adds CreateSaveDataFileSystemWithCreationInfo2, which is called when games are started via qlaunch and corrupts save files.

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/2760
Reviewed-by: crueter <crueter@eden-emu.dev>
Reviewed-by: MaranBr <maranbr@eden-emu.dev>
Co-authored-by: unknown <sahyno1996@gmail.com>
Co-committed-by: unknown <sahyno1996@gmail.com>

src/core/file_sys/fs_save_data_types.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -68,6 +71,11 @@ enum class SaveDataMetaType : u8 {
     ExtensionContext = 2,
 };
 
+enum class SaveDataFormatType : u8 {
+    Normal = 0,
+    NoJournal = 1,
+};
+
 struct SaveDataMetaInfo {
     u32 size;
     SaveDataMetaType type;
@@ -185,4 +193,31 @@ struct HashSalt {
 static_assert(std::is_trivially_copyable_v<HashSalt>, "Data type must be trivially copyable.");
 static_assert(sizeof(HashSalt) == HashSalt::Size);
 
+struct SaveDataCreationInfo2 {
+
+    static constexpr u32 SaveDataCreationInfo2Version = 0x00010000;
+
+    u32 version;
+    SaveDataAttribute attribute;
+    s64 size;
+    s64 journal_size;
+    s64 block_size;
+    u64 owner_id;
+    u32 flags;
+    SaveDataSpaceId space_id;
+    SaveDataFormatType format_type;
+    bool pseudo;
+    u8 reserved1;
+    bool is_hash_salt_enabled;
+    u8 reserved2;
+    HashSalt hash_salt;
+    SaveDataMetaType meta_type;
+    u8 reserved3;
+    s32 meta_size;
+    u8 reserved4;
+};
+static_assert(std::is_trivially_copyable_v<SaveDataCreationInfo2>,
+              "Data type must be trivially copyable.");
+static_assert(sizeof(SaveDataCreationInfo2) == 0xA0, "SaveDataCreationInfo has invalid size.");
+
 } // namespace FileSys

src/core/hle/service/filesystem/fsp/fsp_srv.cpp

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2025 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
 
@@ -76,6 +79,7 @@ FSP_SRV::FSP_SRV(Core::System& system_)
         {34, D<&FSP_SRV::GetCacheStorageSize>, "GetCacheStorageSize"},
         {35, nullptr, "CreateSaveDataFileSystemByHashSalt"},
         {36, nullptr, "OpenHostFileSystemWithOption"},
+        {37, D<&FSP_SRV::CreateSaveDataFileSystemWithCreationInfo2>, "CreateSaveDataFileSystemWithCreationInfo2"},
         {51, D<&FSP_SRV::OpenSaveDataFileSystem>, "OpenSaveDataFileSystem"},
         {52, D<&FSP_SRV::OpenSaveDataFileSystemBySystemSaveDataId>, "OpenSaveDataFileSystemBySystemSaveDataId"},
         {53, D<&FSP_SRV::OpenReadOnlySaveDataFileSystem>, "OpenReadOnlySaveDataFileSystem"},
@@ -244,6 +248,13 @@ Result FSP_SRV::CreateSaveDataFileSystemBySystemSaveDataId(
                                                   save_struct));
 }
 
+Result FSP_SRV::CreateSaveDataFileSystemWithCreationInfo2(
+    FileSys::SaveDataCreationInfo2 save_data_creation_info) {
+    FileSys::VirtualDir save_data_dir{};
+    R_RETURN(save_data_controller->CreateSaveData(&save_data_dir, save_data_creation_info.space_id,
+                                                  save_data_creation_info.attribute));
+}
+
 Result FSP_SRV::IsExFatSupported(Out<bool> out_is_supported) {
     LOG_WARNING(Service_FS, "(STUBBED) called");
 

src/core/hle/service/filesystem/fsp/fsp_srv.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2025 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
 
@@ -55,6 +58,8 @@ private:
                                     FileSys::SaveDataAttribute save_struct, u128 uid);
     Result CreateSaveDataFileSystemBySystemSaveDataId(
         FileSys::SaveDataAttribute save_struct, FileSys::SaveDataCreationInfo save_create_struct);
+    Result CreateSaveDataFileSystemWithCreationInfo2(
+        FileSys::SaveDataCreationInfo2 save_data_creation_info);
     Result IsExFatSupported(Out<bool> out_is_supported);
     Result OpenSaveDataFileSystem(OutInterface<IFileSystem> out_interface,
                                   FileSys::SaveDataSpaceId space_id,

src/core/hle/service/filesystem/save_data_controller.cpp

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 

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

@@ -206,12 +206,12 @@ IApplicationManagerInterface::IApplicationManagerInterface(Core::System& system_
         {1600, nullptr, "GetSystemSeedForPseudoDeviceId"},
         {1601, nullptr, "ResetSystemSeedForPseudoDeviceId"},
         {1700, nullptr, "ListApplicationDownloadingContentMeta"},
-        {1701, D<&IApplicationManagerInterface::GetApplicationView>, "GetApplicationView"},
+        {1701, D<&IApplicationManagerInterface::GetApplicationViewDeprecated>, "GetApplicationViewDeprecated"},
         {1702, nullptr, "GetApplicationDownloadTaskStatus"},
         {1703, nullptr, "GetApplicationViewDownloadErrorContext"},
         {1704, D<&IApplicationManagerInterface::GetApplicationViewWithPromotionInfo>, "GetApplicationViewWithPromotionInfo"},
         {1705, nullptr, "IsPatchAutoDeletableApplication"},
-        {1706, D<&IApplicationManagerInterface::Unknown1706>, "Unknown1706"},
+        {1706, D<&IApplicationManagerInterface::GetApplicationView>, "GetApplicationView"},
         {1800, nullptr, "IsNotificationSetupCompleted"},
         {1801, nullptr, "GetLastNotificationInfoCount"},
         {1802, nullptr, "ListLastNotificationInfo"},
@@ -329,7 +329,7 @@ Result IApplicationManagerInterface::GetApplicationControlData(
     OutBuffer<BufferAttr_HipcMapAlias> out_buffer, Out<u32> out_actual_size,
     ApplicationControlSource application_control_source, u64 application_id) {
     LOG_DEBUG(Service_NS, "called");
-    R_RETURN(IReadOnlyApplicationControlDataInterface(system).GetApplicationControlData(
+    R_RETURN(IReadOnlyApplicationControlDataInterface(system).GetApplicationControlDataOld(
         out_buffer, out_actual_size, application_control_source, application_id));
 }
 
@@ -410,7 +410,7 @@ Result IApplicationManagerInterface::IsAnyApplicationEntityInstalled(
     R_SUCCEED();
 }
 
-Result IApplicationManagerInterface::GetApplicationView(
+Result IApplicationManagerInterface::GetApplicationViewDeprecated(
     OutArray<ApplicationView, BufferAttr_HipcMapAlias> out_application_views,
     InArray<u64, BufferAttr_HipcMapAlias> application_ids) {
     const auto size = (std::min)(out_application_views.size(), application_ids.size());
@@ -419,7 +419,7 @@ Result IApplicationManagerInterface::GetApplicationView(
     for (size_t i = 0; i < size; i++) {
         ApplicationView view{};
         view.application_id = application_ids[i];
-        view.unk = 0x70000;
+        view.version = 0x70000;
         view.flags = 0x401f17;
 
         out_application_views[i] = view;
@@ -437,7 +437,7 @@ Result IApplicationManagerInterface::GetApplicationViewWithPromotionInfo(
     for (size_t i = 0; i < size; i++) {
         ApplicationViewWithPromotionInfo view{};
         view.view.application_id = application_ids[i];
-        view.view.unk = 0x70000;
+        view.view.version = 0x70000;
         view.view.flags = 0x401f17;
         view.promotion = {};
 
@@ -447,6 +447,24 @@ Result IApplicationManagerInterface::GetApplicationViewWithPromotionInfo(
     R_SUCCEED();
 }
 
+Result IApplicationManagerInterface::GetApplicationView(
+    OutArray<ApplicationView, BufferAttr_HipcMapAlias> out_application_views,
+    InArray<u64, BufferAttr_HipcMapAlias> application_ids) {
+    const auto size = (std::min)(out_application_views.size(), application_ids.size());
+    LOG_WARNING(Service_NS, "(STUBBED) called, size={}", application_ids.size());
+
+    for (size_t i = 0; i < size; i++) {
+        ApplicationView view{};
+        view.application_id = application_ids[i];
+        view.version = 0x70000;
+        view.flags = 0x401f17;
+
+        out_application_views[i] = view;
+    }
+
+    R_SUCCEED();
+}
+
 Result IApplicationManagerInterface::GetApplicationRightsOnClient(
     OutArray<ApplicationRightsOnClient, BufferAttr_HipcMapAlias> out_rights, Out<u32> out_count,
     u32 flags, u64 application_id, Uid account_id) {
@@ -535,31 +553,6 @@ Result IApplicationManagerInterface::RequestDownloadApplicationControlDataInBack
     R_SUCCEED();
 }
 
-Result IApplicationManagerInterface::Unknown1706(
-    OutBuffer<BufferAttr_HipcAutoSelect> out_buffer_58,
-    InBuffer<BufferAttr_HipcMapAlias> in_buffer_8) {
-    LOG_WARNING(Service_NS, "(STUBBED) Unknown1706 called: out_size={} in_size={}",
-                out_buffer_58.size(), in_buffer_8.size());
-
-    if (out_buffer_58.size() < 0x58 || in_buffer_8.size() < 0x8) {
-        R_THROW(ResultUnknown);
-    }
-
-    u64 application_id = 0;
-    std::memcpy(&application_id, in_buffer_8.data(), sizeof(u64));
-
-    ApplicationView view{};
-    view.application_id = application_id;
-    view.unk = 0x70000;
-    view.flags = 0x401f17;
-
-    std::memset(out_buffer_58.data(), 0, out_buffer_58.size());
-    std::memcpy(out_buffer_58.data(), &view, sizeof(ApplicationView));
-
-
-    R_SUCCEED();
-}
-
 Result IApplicationManagerInterface::Unknown4022(
     OutCopyHandle<Kernel::KReadableEvent> out_event) {
     LOG_WARNING(Service_NS, "(STUBBED) called");

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

@@ -33,12 +33,15 @@ public:
     Result GetApplicationRecordUpdateSystemEvent(OutCopyHandle<Kernel::KReadableEvent> out_event);
     Result GetGameCardMountFailureEvent(OutCopyHandle<Kernel::KReadableEvent> out_event);
     Result IsAnyApplicationEntityInstalled(Out<bool> out_is_any_application_entity_installed);
-    Result GetApplicationView(
+    Result GetApplicationViewDeprecated(
         OutArray<ApplicationView, BufferAttr_HipcMapAlias> out_application_views,
         InArray<u64, BufferAttr_HipcMapAlias> application_ids);
     Result GetApplicationViewWithPromotionInfo(
         OutArray<ApplicationViewWithPromotionInfo, BufferAttr_HipcMapAlias> out_application_views,
         InArray<u64, BufferAttr_HipcMapAlias> application_ids);
+    Result GetApplicationView(
+        OutArray<ApplicationView, BufferAttr_HipcMapAlias> out_application_views,
+        InArray<u64, BufferAttr_HipcMapAlias> application_ids);
     Result GetApplicationRightsOnClient(
         OutArray<ApplicationRightsOnClient, BufferAttr_HipcMapAlias> out_rights, Out<u32> out_count,
         u32 flags, u64 application_id, Uid account_id);
@@ -59,8 +62,6 @@ public:
 
     Result RequestDownloadApplicationControlDataInBackground(u64 unk,
                                                              u64 application_id);
-    Result Unknown1706(OutBuffer<BufferAttr_HipcAutoSelect> out_buffer_58,
-                       InBuffer<BufferAttr_HipcMapAlias> in_buffer_8);
 
 private:
     KernelHelpers::ServiceContext service_context;

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

@@ -42,20 +42,26 @@ struct ApplicationRecord {
 };
 static_assert(sizeof(ApplicationRecord) == 0x18, "ApplicationRecord has incorrect size.");
 
+/// ApplicationDownloadState
+struct ApplicationDownloadState {
+    u64 downloaded_size;
+    u64 total_size;
+    u32 unk_x10;
+    u8 state;
+    u8 unk_x19;
+    std::array<u8, 0x2> unk_x1a;
+    u64 unk_x20;
+};
+static_assert(sizeof(ApplicationDownloadState) == 0x20,
+              "ApplicationDownloadState has incorrect size.");
+
 /// ApplicationView
 struct ApplicationView {
     u64 application_id;                         ///< ApplicationId.
-    u32 unk;                      ///< Unknown.
+    u32 version;                                ///< Application Version(?)
     u32 flags;                                  ///< Flags.
-    std::array<u8, 0x10> unk_x10; ///< Unknown.
-    u32 unk_x20;                  ///< Unknown.
-    u16 unk_x24;                  ///< Unknown.
-    std::array<u8, 0x2> unk_x26;  ///< Unknown.
-    std::array<u8, 0x8> unk_x28;  ///< Unknown.
-    std::array<u8, 0x10> unk_x30; ///< Unknown.
-    u32 unk_x40;                  ///< Unknown.
-    u8 unk_x44;                   ///< Unknown.
-    std::array<u8, 0xb> unk_x45;  ///< Unknown.
+    ApplicationDownloadState download_state;    ///< \ref ApplicationDownloadState
+    ApplicationDownloadState download_progress; ///< \ref ApplicationDownloadState
 };
 static_assert(sizeof(ApplicationView) == 0x50, "ApplicationView has incorrect size.");
 
@@ -82,13 +88,13 @@ struct PromotionInfo {
 };
 static_assert(sizeof(PromotionInfo) == 0x20, "PromotionInfo has incorrect size.");
 
+// TODO(Maufeat): NsApplicationViewWithPromotionInfo is on SDK20+ 0x78 bytes
 /// NsApplicationViewWithPromotionInfo
 struct ApplicationViewWithPromotionInfo {
     ApplicationView view;           ///< \ref NsApplicationView
     PromotionInfo promotion;        ///< \ref NsPromotionInfo
-    std::array<u8, 0x8> padding{};  ///< Extra padding for newer HOS versions
 };
-static_assert(sizeof(ApplicationViewWithPromotionInfo) == 0x78,
+static_assert(sizeof(ApplicationViewWithPromotionInfo) == 0x70,
               "ApplicationViewWithPromotionInfo has incorrect size.");
 
 struct ApplicationOccupiedSizeEntity {

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

@@ -22,12 +22,12 @@ IReadOnlyApplicationControlDataInterface::IReadOnlyApplicationControlDataInterfa
     : ServiceFramework{system_, "IReadOnlyApplicationControlDataInterface"} {
     // clang-format off
     static const FunctionInfo functions[] = {
-        {0, D<&IReadOnlyApplicationControlDataInterface::GetApplicationControlData>, "GetApplicationControlData"},
+        {0, D<&IReadOnlyApplicationControlDataInterface::GetApplicationControlDataOld>, "GetApplicationControlDataOld"},
         {1, D<&IReadOnlyApplicationControlDataInterface::GetApplicationDesiredLanguage>, "GetApplicationDesiredLanguage"},
         {2, D<&IReadOnlyApplicationControlDataInterface::ConvertApplicationLanguageToLanguageCode>, "ConvertApplicationLanguageToLanguageCode"},
         {3, nullptr, "ConvertLanguageCodeToApplicationLanguage"},
         {4, nullptr, "SelectApplicationDesiredLanguage"},
-        {5, D<&IReadOnlyApplicationControlDataInterface::GetApplicationDisplayData>, "GetApplicationDisplayData"},
+        {5, D<&IReadOnlyApplicationControlDataInterface::GetApplicationControlDataWithIconSize>, "GetApplicationControlDataWithIconSize"},
     };
     // clang-format on
 
@@ -36,7 +36,7 @@ IReadOnlyApplicationControlDataInterface::IReadOnlyApplicationControlDataInterfa
 
 IReadOnlyApplicationControlDataInterface::~IReadOnlyApplicationControlDataInterface() = default;
 
-Result IReadOnlyApplicationControlDataInterface::GetApplicationControlData(
+Result IReadOnlyApplicationControlDataInterface::GetApplicationControlDataOld(
     OutBuffer<BufferAttr_HipcMapAlias> out_buffer, Out<u32> out_actual_size,
     ApplicationControlSource application_control_source, u64 application_id) {
     LOG_INFO(Service_NS, "called with control_source={}, application_id={:016X}",
@@ -124,32 +124,87 @@ Result IReadOnlyApplicationControlDataInterface::ConvertApplicationLanguageToLan
     R_SUCCEED();
 }
 
-Result IReadOnlyApplicationControlDataInterface::GetApplicationDisplayData(
-    OutBuffer<BufferAttr_HipcMapAlias> out_buffer, Out<u64> out_size, u64 language_code,
-    u64 application_id) {
-    LOG_INFO(Service_NS, "called with application_id={:016X}, language_code={:016X}",
-             application_id, language_code);
+Result IReadOnlyApplicationControlDataInterface::GetApplicationControlData(
+    OutBuffer<BufferAttr_HipcMapAlias> out_buffer, Out<u32> out_actual_size,
+    ApplicationControlSource application_control_source, u64 application_id) {
+    LOG_INFO(Service_NS, "called with control_source={}, application_id={:016X}",
+             application_control_source, application_id);
 
-    constexpr u64 payload_size = sizeof(ApplicationDisplayData);
+    const FileSys::PatchManager pm{application_id, system.GetFileSystemController(),
+                                   system.GetContentProvider()};
+    const auto control = pm.GetControlMetadata();
+    const auto size = out_buffer.size();
+
+    const auto icon_size = control.second ? control.second->GetSize() : 0;
+    const auto total_size = sizeof(FileSys::RawNACP) + icon_size;
 
-    if (out_buffer.size() < payload_size) {
-        LOG_ERROR(Service_NS, "output buffer is too small! (actual={}, expected_min={})",
-                  out_buffer.size(), payload_size);
+    if (size < total_size) {
+        LOG_ERROR(Service_NS, "output buffer is too small! (actual={:016X}, expected_min=0x4000)",
+                  size);
         R_THROW(ResultUnknown);
     }
 
+    if (control.first != nullptr) {
+        const auto bytes = control.first->GetRawBytes();
+        std::memcpy(out_buffer.data(), bytes.data(), bytes.size());
+    } else {
+        LOG_WARNING(Service_NS, "missing NACP data for application_id={:016X}, defaulting to zero",
+                    application_id);
+        std::memset(out_buffer.data(), 0, sizeof(FileSys::RawNACP));
+    }
+
+    if (control.second != nullptr) {
+        control.second->Read(out_buffer.data() + sizeof(FileSys::RawNACP), icon_size);
+    } else {
+        LOG_WARNING(Service_NS, "missing icon data for application_id={:016X}", application_id);
+    }
+
+    *out_actual_size = static_cast<u32>(total_size);
+    R_SUCCEED();
+}
+
+Result IReadOnlyApplicationControlDataInterface::GetApplicationControlDataWithIconSize(
+    OutBuffer<BufferAttr_HipcMapAlias> out_buffer,
+    Out<u64> out_total_size,
+    ApplicationControlSource application_control_source,
+    u64 application_id) {
+    LOG_INFO(Service_NS, "called with control_source={}, application_id={:016X}",
+             application_control_source, application_id);
+
+    constexpr size_t kExpectedBufferSize = 0x14000;
+    constexpr size_t kNACPSize = sizeof(FileSys::RawNACP);
+    constexpr size_t kMaxIconSize = kExpectedBufferSize - kNACPSize;
+
     const FileSys::PatchManager pm{application_id, system.GetFileSystemController(),
                                    system.GetContentProvider()};
     const auto control = pm.GetControlMetadata();
+    const auto size = out_buffer.size();
 
-    ApplicationDisplayData display_data{};
+    if (size < kExpectedBufferSize) {
+        LOG_ERROR(Service_NS, "output buffer is too small! (actual={:016X}, required={:016X})", size, kExpectedBufferSize);
+        R_THROW(ResultUnknown);
+    }
 
-    std::memset(display_data.application_name.data(), 0, display_data.application_name.size());
-    std::memset(display_data.developer_name.data(), 0, display_data.developer_name.size());
+    // Copy NACP
+    if (control.first != nullptr) {
+        const auto bytes = control.first->GetRawBytes();
+        std::memcpy(out_buffer.data(), bytes.data(), bytes.size());
+    } else {
+        std::memset(out_buffer.data(), 0, kNACPSize);
+    }
 
-    std::memcpy(out_buffer.data(), &display_data, payload_size);
-    *out_size = payload_size;
+    // Copy icon, pad with zeros if needed
+    size_t icon_size = control.second ? control.second->GetSize() : 0;
+    if (icon_size > kMaxIconSize) {
+        icon_size = kMaxIconSize; // Truncate if too large
+    }
+    if (control.second != nullptr && icon_size > 0) {
+        control.second->Read(out_buffer.data() + kNACPSize, icon_size);
+    } else {
+        std::memset(out_buffer.data() + kNACPSize, 0, kMaxIconSize);
+    }
 
+    *out_total_size = kExpectedBufferSize;
     R_SUCCEED();
 }
 

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

@@ -19,7 +19,7 @@ public:
     explicit IReadOnlyApplicationControlDataInterface(Core::System& system_);
     ~IReadOnlyApplicationControlDataInterface() override;
 
-    Result GetApplicationControlData(OutBuffer<BufferAttr_HipcMapAlias> out_buffer,
+    Result GetApplicationControlDataOld(OutBuffer<BufferAttr_HipcMapAlias> out_buffer,
                                      Out<u32> out_actual_size,
                                      ApplicationControlSource application_control_source,
                                      u64 application_id);
@@ -27,9 +27,14 @@ public:
                                          u32 supported_languages);
     Result ConvertApplicationLanguageToLanguageCode(Out<u64> out_language_code,
                                                     ApplicationLanguage application_language);
-
-    Result GetApplicationDisplayData(OutBuffer<BufferAttr_HipcMapAlias> out_buffer,
-                                     Out<u64> out_size, u64 language_code,
+    Result GetApplicationControlData(OutBuffer<BufferAttr_HipcMapAlias> out_buffer,
+                                        Out<u32> out_actual_size,
+                                        ApplicationControlSource application_control_source,
+                                        u64 application_id);
+    Result GetApplicationControlDataWithIconSize(
+        OutBuffer<BufferAttr_HipcMapAlias> out_buffer,
+        Out<u64> out_total_size,
+        ApplicationControlSource application_control_source,
         u64 application_id);
 };
 

src/core/hle/service/olsc/daemon_controller.cpp

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -19,7 +22,7 @@ IDaemonController::IDaemonController(Core::System& system_)
         {6, nullptr, "SetGlobalDownloadEnabledForAccount"},
         {10, nullptr, "GetForbiddenSaveDataIndication"},
         {11, nullptr, "GetStopperObject"},
-        {12, nullptr, "GetState"},
+        {12, D<&IDaemonController::GetState>, "GetState"},
     };
     // clang-format on
 
@@ -37,4 +40,11 @@ Result IDaemonController::GetAutoTransferEnabledForAccountAndApplication(Out<boo
     R_SUCCEED();
 }
 
+Result IDaemonController::GetState(Out<u8> state, Common::UUID user_id,  u64 application_id) {
+    LOG_WARNING(Service_OLSC, "(STUBBED) called, user_id={} application_id={:016X}",
+                user_id.FormattedString(), application_id);
+    *state = 0;
+    R_SUCCEED();
+}
+
 } // namespace Service::OLSC

src/core/hle/service/olsc/daemon_controller.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -15,6 +18,7 @@ public:
 private:
     Result GetAutoTransferEnabledForAccountAndApplication(Out<bool> out_is_enabled,
                                                           Common::UUID user_id, u64 application_id);
+    Result GetState(Out<u8> state, Common::UUID user_id, u64 application_id);
 };
 
 } // namespace Service::OLSC

src/core/hle/service/olsc/olsc_service_for_system_service.cpp

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -100,10 +103,13 @@ Result IOlscServiceForSystemService::OpenDaemonController(
     R_SUCCEED();
 }
 
-Result IOlscServiceForSystemService::GetDataTransferPolicyInfo(Out<u16> out_policy_info,
-                                                               u64 application_id) {
+Result IOlscServiceForSystemService::GetDataTransferPolicyInfo(
+    Out<DataTransferPolicy> out_policy_info, u64 application_id) {
     LOG_WARNING(Service_OLSC, "(STUBBED) called");
-    *out_policy_info = 0;
+    DataTransferPolicy policy{};
+    policy.upload_policy = 0;
+    policy.download_policy = 0;
+    *out_policy_info = policy;
     R_SUCCEED();
 }
 

src/core/hle/service/olsc/olsc_service_for_system_service.h

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -10,6 +13,11 @@ class IDaemonController;
 class IRemoteStorageController;
 class ITransferTaskListController;
 
+struct DataTransferPolicy {
+    u8 upload_policy;
+    u8 download_policy;
+};
+
 class IOlscServiceForSystemService final : public ServiceFramework<IOlscServiceForSystemService> {
 public:
     explicit IOlscServiceForSystemService(Core::System& system_);
@@ -20,7 +28,7 @@ private:
         Out<SharedPointer<ITransferTaskListController>> out_interface);
     Result OpenRemoteStorageController(Out<SharedPointer<IRemoteStorageController>> out_interface);
     Result OpenDaemonController(Out<SharedPointer<IDaemonController>> out_interface);
-    Result GetDataTransferPolicyInfo(Out<u16> out_policy_info, u64 application_id);
+    Result GetDataTransferPolicyInfo(Out<DataTransferPolicy> out_policy_info, u64 application_id);
     Result CloneService(Out<SharedPointer<IOlscServiceForSystemService>> out_interface);
 };