14 files changed, 212 insertions, 41 deletions

diff --git a/src/citra_qt/bootmanager.cpp b/src/citra_qt/bootmanager.cpp
index 06b62f44c..a8a4aed8b 100644
--- a/src/citra_qt/bootmanager.cpp
+++ b/src/citra_qt/bootmanager.cpp
@@ -37,7 +37,10 @@ void EmuThread::run() {
             if (!was_active)
                 emit DebugModeLeft();
 
-            Core::System::GetInstance().RunLoop();
+            Core::System::ResultStatus result = Core::System::GetInstance().RunLoop();
+            if (result != Core::System::ResultStatus::Success) {
+                emit ErrorThrown(result, Core::System::GetInstance().GetStatusDetails());
+            }
 
             was_active = running || exec_step;
             if (!was_active && !stop_run)
diff --git a/src/citra_qt/bootmanager.h b/src/citra_qt/bootmanager.h
index 9d39f1af8..4b3a3b3cc 100644
--- a/src/citra_qt/bootmanager.h
+++ b/src/citra_qt/bootmanager.h
@@ -10,6 +10,7 @@
 #include <QGLWidget>
 #include <QThread>
 #include "common/thread.h"
+#include "core/core.h"
 #include "core/frontend/emu_window.h"
 #include "core/frontend/motion_emu.h"
 
@@ -97,6 +98,8 @@ signals:
      * Qt::BlockingQueuedConnection (additionally block source thread until slot returns)
      */
     void DebugModeLeft();
+
+    void ErrorThrown(Core::System::ResultStatus, std::string);
 };
 
 class GRenderWindow : public QWidget, public EmuWindow {
diff --git a/src/citra_qt/main.cpp b/src/citra_qt/main.cpp
index eb2c7d613..4f5b2ddab 100644
--- a/src/citra_qt/main.cpp
+++ b/src/citra_qt/main.cpp
@@ -93,6 +93,14 @@ void GMainWindow::InitializeWidgets() {
     ui.horizontalLayout->addWidget(game_list);
 
     // Create status bar
+    message_label = new QLabel();
+    // Configured separately for left alignment
+    message_label->setVisible(false);
+    message_label->setFrameStyle(QFrame::NoFrame);
+    message_label->setContentsMargins(4, 0, 4, 0);
+    message_label->setAlignment(Qt::AlignLeft);
+    statusBar()->addPermanentWidget(message_label, 1);
+
     emu_speed_label = new QLabel();
     emu_speed_label->setToolTip(tr("Current emulation speed. Values higher or lower than 100% "
                                    "indicate emulation is running faster or slower than a 3DS."));
@@ -108,7 +116,7 @@ void GMainWindow::InitializeWidgets() {
         label->setVisible(false);
         label->setFrameStyle(QFrame::NoFrame);
         label->setContentsMargins(4, 0, 4, 0);
-        statusBar()->addPermanentWidget(label);
+        statusBar()->addPermanentWidget(label, 0);
     }
     statusBar()->setVisible(true);
     setStyleSheet("QStatusBar::item{border: none;}");
@@ -300,9 +308,8 @@ bool GMainWindow::LoadROM(const QString& filename) {
     render_window->MakeCurrent();
 
     if (!gladLoadGL()) {
-        QMessageBox::critical(this, tr("Error while starting Citra!"),
-                              tr("Failed to initialize the video core!\n\n"
-                                 "Please ensure that your GPU supports OpenGL 3.3 and that you "
+        QMessageBox::critical(this, tr("Error while initializing OpenGL 3.3 Core!"),
+                              tr("Your GPU may not support OpenGL 3.3, or you do not"
                                  "have the latest graphics driver."));
         return false;
     }
@@ -327,18 +334,17 @@ bool GMainWindow::LoadROM(const QString& filename) {
             break;
 
         case Core::System::ResultStatus::ErrorLoader_ErrorEncrypted: {
-            // Build the MessageBox ourselves to have clickable link
-            QMessageBox popup_error;
-            popup_error.setTextFormat(Qt::RichText);
-            popup_error.setWindowTitle(tr("Error while loading ROM!"));
-            popup_error.setText(
+            QMessageBox::critical(
+                this, tr("Error while loading ROM!"),
                 tr("The game that you are trying to load must be decrypted before being used with "
-                   "Citra.<br/><br/>"
-                   "For more information on dumping and decrypting games, please see: <a "
-                   "href='https://citra-emu.org/wiki/Dumping-Game-Cartridges'>https://"
-                   "citra-emu.org/wiki/Dumping-Game-Cartridges</a>"));
-            popup_error.setIcon(QMessageBox::Critical);
-            popup_error.exec();
+                   "Citra. A real 3DS is required.<br/><br/>"
+                   "For more information on dumping and decrypting games, please see the following "
+                   "wiki pages: <ul>"
+                   "<li><a href='https://citra-emu.org/wiki/dumping-game-cartridges/'>Dumping Game "
+                   "Cartridges</a></li>"
+                   "<li><a href='https://citra-emu.org/wiki/dumping-installed-titles/'>Dumping "
+                   "Installed Titles</a></li>"
+                   "</ul>"));
             break;
         }
         case Core::System::ResultStatus::ErrorLoader_ErrorInvalidFormat:
@@ -346,8 +352,23 @@ bool GMainWindow::LoadROM(const QString& filename) {
                                   tr("The ROM format is not supported."));
             break;
 
+        case Core::System::ResultStatus::ErrorVideoCore:
+            QMessageBox::critical(
+                this, tr("An error occured in the video core."),
+                tr("Citra has encountered an error while running the video core, please see the "
+                   "log for more details."
+                   "For more information on accessing the log, please see the following page: "
+                   "<a href='https://community.citra-emu.org/t/how-to-upload-the-log-file/296'>How "
+                   "to "
+                   "Upload the Log File</a>."
+                   "Ensure that you have the latest graphics drivers for your GPU."));
+
+            break;
+
         default:
-            QMessageBox::critical(this, tr("Error while loading ROM!"), tr("Unknown error!"));
+            QMessageBox::critical(
+                this, tr("Error while loading ROM!"),
+                tr("An unknown error occured. Please see the log for more details."));
             break;
         }
         return false;
@@ -424,6 +445,7 @@ void GMainWindow::ShutdownGame() {
 
     // Disable status bar updates
     status_bar_update_timer.stop();
+    message_label->setVisible(false);
     emu_speed_label->setVisible(false);
     game_fps_label->setVisible(false);
     emu_frametime_label->setVisible(false);
@@ -530,6 +552,10 @@ void GMainWindow::OnMenuRecentFile() {
 
 void GMainWindow::OnStartGame() {
     emu_thread->SetRunning(true);
+    qRegisterMetaType<Core::System::ResultStatus>("Core::System::ResultStatus");
+    qRegisterMetaType<std::string>("std::string");
+    connect(emu_thread.get(), SIGNAL(ErrorThrown(Core::System::ResultStatus, std::string)), this,
+            SLOT(OnCoreError(Core::System::ResultStatus, std::string)));
 
     ui.action_Start->setEnabled(false);
     ui.action_Start->setText(tr("Continue"));
@@ -622,11 +648,74 @@ void GMainWindow::UpdateStatusBar() {
     emu_frametime_label->setVisible(true);
 }
 
+void GMainWindow::OnCoreError(Core::System::ResultStatus result, std::string details) {
+    QMessageBox::StandardButton answer;
+    QString status_message;
+    const QString common_message =
+        tr("The game you are trying to load requires additional files from your 3DS to be dumped "
+           "before playing.<br/><br/>For more information on dumping these files, please see the "
+           "following wiki page: <a "
+           "href='https://citra-emu.org/wiki/"
+           "dumping-system-archives-and-the-shared-fonts-from-a-3ds-console/'>Dumping System "
+           "Archives and the Shared Fonts from a 3DS Console</a>.<br/><br/>Would you like to quit "
+           "back to the game list? Continuing emulation may result in crashes, corrupted save "
+           "data, or other bugs.");
+    switch (result) {
+    case Core::System::ResultStatus::ErrorSystemFiles: {
+        QString message = "Citra was unable to locate a 3DS system archive";
+        if (!details.empty()) {
+            message.append(tr(": %1. ").arg(details.c_str()));
+        } else {
+            message.append(". ");
+        }
+        message.append(common_message);
+
+        answer = QMessageBox::question(this, tr("System Archive Not Found"), message,
+                                       QMessageBox::Yes | QMessageBox::No, QMessageBox::No);
+        status_message = "System Archive Missing";
+        break;
+    }
+
+    case Core::System::ResultStatus::ErrorSharedFont: {
+        QString message = tr("Citra was unable to locate the 3DS shared fonts. ");
+        message.append(common_message);
+        answer = QMessageBox::question(this, tr("Shared Fonts Not Found"), message,
+                                       QMessageBox::Yes | QMessageBox::No, QMessageBox::No);
+        status_message = "Shared Font Missing";
+        break;
+    }
+
+    default:
+        answer = QMessageBox::question(
+            this, tr("Fatal Error"),
+            tr("Citra has encountered a fatal error, please see the log for more details. "
+               "For more information on accessing the log, please see the following page: "
+               "<a href='https://community.citra-emu.org/t/how-to-upload-the-log-file/296'>How to "
+               "Upload the Log File</a>.<br/><br/>Would you like to quit back to the game list? "
+               "Continuing emulation may result in crashes, corrupted save data, or other bugs."),
+            QMessageBox::Yes | QMessageBox::No, QMessageBox::No);
+        status_message = "Fatal Error encountered";
+        break;
+    }
+
+    if (answer == QMessageBox::Yes) {
+        if (emu_thread) {
+            ShutdownGame();
+        }
+    } else {
+        // Only show the message if the game is still running.
+        if (emu_thread) {
+            message_label->setText(status_message);
+            message_label->setVisible(true);
+        }
+    }
+}
+
 bool GMainWindow::ConfirmClose() {
     if (emu_thread == nullptr || !UISettings::values.confirm_before_closing)
         return true;
 
-    auto answer =
+    QMessageBox::StandardButton answer =
         QMessageBox::question(this, tr("Citra"), tr("Are you sure you want to close Citra?"),
                               QMessageBox::Yes | QMessageBox::No, QMessageBox::No);
     return answer != QMessageBox::No;
diff --git a/src/citra_qt/main.h b/src/citra_qt/main.h
index cb2e87cbd..952a50974 100644
--- a/src/citra_qt/main.h
+++ b/src/citra_qt/main.h
@@ -8,6 +8,7 @@
 #include <memory>
 #include <QMainWindow>
 #include <QTimer>
+#include "core/core.h"
 #include "ui_main.h"
 
 class Config;
@@ -125,6 +126,7 @@ private slots:
     void OnDisplayTitleBars(bool);
     void ToggleWindowMode();
     void OnCreateGraphicsSurfaceViewer();
+    void OnCoreError(Core::System::ResultStatus, std::string);
 
 private:
     void UpdateStatusBar();
@@ -135,6 +137,7 @@ private:
     GameList* game_list;
 
     // Status bar elements
+    QLabel* message_label = nullptr;
     QLabel* emu_speed_label = nullptr;
     QLabel* game_fps_label = nullptr;
     QLabel* emu_frametime_label = nullptr;
diff --git a/src/core/core.cpp b/src/core/core.cpp
index 450e7566d..5429bcb26 100644
--- a/src/core/core.cpp
+++ b/src/core/core.cpp
@@ -3,7 +3,7 @@
 // Refer to the license.txt file included.
 
 #include <memory>
-
+#include <utility>
 #include "audio_core/audio_core.h"
 #include "common/logging/log.h"
 #include "core/arm/arm_interface.h"
@@ -26,6 +26,7 @@ namespace Core {
 /*static*/ System System::s_instance;
 
 System::ResultStatus System::RunLoop(int tight_loop) {
+    status = ResultStatus::Success;
     if (!cpu_core) {
         return ResultStatus::ErrorNotInitialized;
     }
@@ -59,7 +60,7 @@ System::ResultStatus System::RunLoop(int tight_loop) {
     HW::Update();
     Reschedule();
 
-    return ResultStatus::Success;
+    return status;
 }
 
 System::ResultStatus System::SingleStep() {
@@ -73,14 +74,25 @@ System::ResultStatus System::Load(EmuWindow* emu_window, const std::string& file
         LOG_CRITICAL(Core, "Failed to obtain loader for %s!", filepath.c_str());
         return ResultStatus::ErrorGetLoader;
     }
+    std::pair<boost::optional<u32>, Loader::ResultStatus> system_mode =
+        app_loader->LoadKernelSystemMode();
+
+    if (system_mode.second != Loader::ResultStatus::Success) {
+        LOG_CRITICAL(Core, "Failed to determine system mode (Error %i)!",
+                     static_cast<int>(system_mode.second));
+        System::Shutdown();
 
-    boost::optional<u32> system_mode{app_loader->LoadKernelSystemMode()};
-    if (!system_mode) {
-        LOG_CRITICAL(Core, "Failed to determine system mode!");
-        return ResultStatus::ErrorSystemMode;
+        switch (system_mode.second) {
+        case Loader::ResultStatus::ErrorEncrypted:
+            return ResultStatus::ErrorLoader_ErrorEncrypted;
+        case Loader::ResultStatus::ErrorInvalidFormat:
+            return ResultStatus::ErrorLoader_ErrorInvalidFormat;
+        default:
+            return ResultStatus::ErrorSystemMode;
+        }
     }
 
-    ResultStatus init_result{Init(emu_window, system_mode.get())};
+    ResultStatus init_result{Init(emu_window, system_mode.first.get())};
     if (init_result != ResultStatus::Success) {
         LOG_CRITICAL(Core, "Failed to initialize system (Error %i)!", init_result);
         System::Shutdown();
@@ -101,7 +113,8 @@ System::ResultStatus System::Load(EmuWindow* emu_window, const std::string& file
             return ResultStatus::ErrorLoader;
         }
     }
-    return ResultStatus::Success;
+    status = ResultStatus::Success;
+    return status;
 }
 
 void System::PrepareReschedule() {
diff --git a/src/core/core.h b/src/core/core.h
index 6af772831..4e3b6b409 100644
--- a/src/core/core.h
+++ b/src/core/core.h
@@ -40,7 +40,10 @@ public:
         ErrorLoader_ErrorEncrypted, ///< Error loading the specified application due to encryption
         ErrorLoader_ErrorInvalidFormat, ///< Error loading the specified application due to an
                                         /// invalid format
+        ErrorSystemFiles,               ///< Error in finding system files
+        ErrorSharedFont,                ///< Error in finding shared font
         ErrorVideoCore,                 ///< Error in the video core
+        ErrorUnknown                    ///< Any other error
     };
 
     /**
@@ -105,6 +108,17 @@ public:
     PerfStats perf_stats;
     FrameLimiter frame_limiter;
 
+    void SetStatus(ResultStatus new_status, const char* details = nullptr) {
+        status = new_status;
+        if (details) {
+            status_details = details;
+        }
+    }
+
+    const std::string& GetStatusDetails() const {
+        return status_details;
+    }
+
 private:
     /**
      * Initialize the emulated system.
@@ -130,6 +144,9 @@ private:
     std::unique_ptr<Core::TelemetrySession> telemetry_session;
 
     static System s_instance;
+
+    ResultStatus status = ResultStatus::Success;
+    std::string status_details = "";
 };
 
 inline ARM_Interface& CPU() {
diff --git a/src/core/file_sys/archive_ncch.cpp b/src/core/file_sys/archive_ncch.cpp
index 89455e39c..6d9007731 100644
--- a/src/core/file_sys/archive_ncch.cpp
+++ b/src/core/file_sys/archive_ncch.cpp
@@ -9,7 +9,9 @@
 #include "common/file_util.h"
 #include "common/logging/log.h"
 #include "common/string_util.h"
+#include "core/core.h"
 #include "core/file_sys/archive_ncch.h"
+#include "core/file_sys/errors.h"
 #include "core/file_sys/ivfc_archive.h"
 #include "core/hle/service/fs/archive.h"
 
@@ -33,11 +35,44 @@ ArchiveFactory_NCCH::ArchiveFactory_NCCH(const std::string& nand_directory)
 ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_NCCH::Open(const Path& path) {
     auto vec = path.AsBinary();
     const u32* data = reinterpret_cast<u32*>(vec.data());
-    std::string file_path = GetNCCHPath(mount_point, data[1], data[0]);
+    u32 high = data[1];
+    u32 low = data[0];
+    std::string file_path = GetNCCHPath(mount_point, high, low);
     auto file = std::make_shared<FileUtil::IOFile>(file_path, "rb");
 
     if (!file->IsOpen()) {
-        return ResultCode(-1); // TODO(Subv): Find the right error code
+        // High Title ID of the archive: The category (https://3dbrew.org/wiki/Title_list).
+        constexpr u32 shared_data_archive = 0x0004009B;
+        constexpr u32 system_data_archive = 0x000400DB;
+
+        // Low Title IDs.
+        constexpr u32 mii_data = 0x00010202;
+        constexpr u32 region_manifest = 0x00010402;
+        constexpr u32 ng_word_list = 0x00010302;
+
+        LOG_DEBUG(Service_FS, "Full Path: %s. Category: 0x%X. Path: 0x%X.", path.DebugStr().c_str(),
+                  high, low);
+
+        if (high == shared_data_archive) {
+            if (low == mii_data) {
+                LOG_ERROR(Service_FS, "Failed to get a handle for shared data archive: Mii data. ");
+                Core::System::GetInstance().SetStatus(Core::System::ResultStatus::ErrorSystemFiles,
+                                                      "Mii data");
+            } else if (low == region_manifest) {
+                LOG_ERROR(Service_FS,
+                          "Failed to get a handle for shared data archive: region manifest.");
+                Core::System::GetInstance().SetStatus(Core::System::ResultStatus::ErrorSystemFiles,
+                                                      "Region manifest");
+            }
+        } else if (high == system_data_archive) {
+            if (low == ng_word_list) {
+                LOG_ERROR(Service_FS,
+                          "Failed to get a handle for system data archive: NG bad word list.");
+                Core::System::GetInstance().SetStatus(Core::System::ResultStatus::ErrorSystemFiles,
+                                                      "NG bad word list");
+            }
+        }
+        return ERROR_NOT_FOUND;
     }
     auto size = file->GetSize();
 
diff --git a/src/core/hle/service/apt/apt.cpp b/src/core/hle/service/apt/apt.cpp
index 366d1eacf..4c587e3c8 100644
--- a/src/core/hle/service/apt/apt.cpp
+++ b/src/core/hle/service/apt/apt.cpp
@@ -5,6 +5,7 @@
 #include "common/common_paths.h"
 #include "common/file_util.h"
 #include "common/logging/log.h"
+#include "core/core.h"
 #include "core/hle/applets/applet.h"
 #include "core/hle/kernel/event.h"
 #include "core/hle/kernel/mutex.h"
@@ -74,6 +75,7 @@ void GetSharedFont(Service::Interface* self) {
         LOG_ERROR(Service_APT, "shared font file missing - go dump it from your 3ds");
         rb.Push<u32>(-1); // TODO: Find the right error code
         rb.Skip(1 + 2, true);
+        Core::System::GetInstance().SetStatus(Core::System::ResultStatus::ErrorSharedFont);
         return;
     }
 
diff --git a/src/core/hle/service/err_f.cpp b/src/core/hle/service/err_f.cpp
index 9da55f328..4f4dc6dc7 100644
--- a/src/core/hle/service/err_f.cpp
+++ b/src/core/hle/service/err_f.cpp
@@ -10,6 +10,7 @@
 #include "common/bit_field.h"
 #include "common/common_types.h"
 #include "common/logging/log.h"
+#include "core/core.h"
 #include "core/hle/result.h"
 #include "core/hle/service/err_f.h"
 
@@ -172,6 +173,7 @@ static void ThrowFatalError(Interface* self) {
     const ErrInfo* errinfo = reinterpret_cast<ErrInfo*>(&cmd_buff[1]);
     LOG_CRITICAL(Service_ERR, "Fatal error type: %s",
                  GetErrType(errinfo->errinfo_common.specifier).c_str());
+    Core::System::GetInstance().SetStatus(Core::System::ResultStatus::ErrorUnknown);
 
     // Generic Info
     LogGenericInfo(errinfo->errinfo_common);
diff --git a/src/core/hle/service/fs/archive.cpp b/src/core/hle/service/fs/archive.cpp
index 632712f2c..21929e966 100644
--- a/src/core/hle/service/fs/archive.cpp
+++ b/src/core/hle/service/fs/archive.cpp
@@ -258,9 +258,7 @@ ResultVal<ArchiveHandle> OpenArchive(ArchiveIdCode id_code, FileSys::Path& archi
 
     auto itr = id_code_map.find(id_code);
     if (itr == id_code_map.end()) {
-        // TODO: Verify error against hardware
-        return ResultCode(ErrorDescription::NotFound, ErrorModule::FS, ErrorSummary::NotFound,
-                          ErrorLevel::Permanent);
+        return FileSys::ERROR_NOT_FOUND;
     }
 
     CASCADE_RESULT(std::unique_ptr<ArchiveBackend> res, itr->second->Open(archive_path));
diff --git a/src/core/hle/service/fs/fs_user.cpp b/src/core/hle/service/fs/fs_user.cpp
index e53a970d3..c1825e9c8 100644
--- a/src/core/hle/service/fs/fs_user.cpp
+++ b/src/core/hle/service/fs/fs_user.cpp
@@ -8,6 +8,7 @@
 #include "common/logging/log.h"
 #include "common/scope_exit.h"
 #include "common/string_util.h"
+#include "core/core.h"
 #include "core/file_sys/errors.h"
 #include "core/hle/kernel/client_session.h"
 #include "core/hle/result.h"
@@ -130,7 +131,7 @@ static void OpenFileDirectly(Service::Interface* self) {
     ResultVal<ArchiveHandle> archive_handle = OpenArchive(archive_id, archive_path);
     if (archive_handle.Failed()) {
         LOG_ERROR(Service_FS,
-                  "failed to get a handle for archive archive_id=0x%08X archive_path=%s",
+                  "Failed to get a handle for archive archive_id=0x%08X archive_path=%s",
                   static_cast<u32>(archive_id), archive_path.DebugStr().c_str());
         cmd_buff[1] = archive_handle.Code().raw;
         cmd_buff[3] = 0;
diff --git a/src/core/loader/loader.h b/src/core/loader/loader.h
index 1d80766ae..48bbf687d 100644
--- a/src/core/loader/loader.h
+++ b/src/core/loader/loader.h
@@ -8,6 +8,7 @@
 #include <initializer_list>
 #include <memory>
 #include <string>
+#include <utility>
 #include <vector>
 #include <boost/optional.hpp>
 #include "common/common_types.h"
@@ -100,11 +101,11 @@ public:
      * Loads the system mode that this application needs.
      * This function defaults to 2 (96MB allocated to the application) if it can't read the
      * information.
-     * @returns Optional with the kernel system mode
+     * @returns A pair with the optional system mode, and and the status.
      */
-    virtual boost::optional<u32> LoadKernelSystemMode() {
+    virtual std::pair<boost::optional<u32>, ResultStatus> LoadKernelSystemMode() {
         // 96MB allocated to the application.
-        return 2;
+        return std::make_pair(2, ResultStatus::Success);
     }
 
     /**
diff --git a/src/core/loader/ncch.cpp b/src/core/loader/ncch.cpp
index beeb13ffa..ffc019560 100644
--- a/src/core/loader/ncch.cpp
+++ b/src/core/loader/ncch.cpp
@@ -121,12 +121,16 @@ FileType AppLoader_NCCH::IdentifyType(FileUtil::IOFile& file) {
     return FileType::Error;
 }
 
-boost::optional<u32> AppLoader_NCCH::LoadKernelSystemMode() {
+std::pair<boost::optional<u32>, ResultStatus> AppLoader_NCCH::LoadKernelSystemMode() {
     if (!is_loaded) {
-        if (LoadExeFS() != ResultStatus::Success)
-            return boost::none;
+        ResultStatus res = LoadExeFS();
+        if (res != ResultStatus::Success) {
+            return std::make_pair(boost::none, res);
+        }
     }
-    return exheader_header.arm11_system_local_caps.system_mode.Value();
+    // Set the system mode as the one from the exheader.
+    return std::make_pair(exheader_header.arm11_system_local_caps.system_mode.Value(),
+                          ResultStatus::Success);
 }
 
 ResultStatus AppLoader_NCCH::LoadExec() {
diff --git a/src/core/loader/ncch.h b/src/core/loader/ncch.h
index 4ef95b5c6..0ebd47fd5 100644
--- a/src/core/loader/ncch.h
+++ b/src/core/loader/ncch.h
@@ -179,9 +179,9 @@ public:
 
     /**
      * Loads the Exheader and returns the system mode for this application.
-     * @return Optional with the kernel system mode
+     * @returns A pair with the optional system mode, and and the status.
      */
-    boost::optional<u32> LoadKernelSystemMode() override;
+    std::pair<boost::optional<u32>, ResultStatus> LoadKernelSystemMode() override;
 
     ResultStatus ReadCode(std::vector<u8>& buffer) override;