Merge pull request #4895 from Morph1984/cave-story-plus-applet-fix

applets/controller: Introduce additional checks for mode and caller

2 files changed, 80 insertions, 26 deletions

diff --git a/src/core/hle/service/am/applets/controller.cpp b/src/core/hle/service/am/applets/controller.cpp
index 2151da783..a0152b4ea 100644
--- a/src/core/hle/service/am/applets/controller.cpp
+++ b/src/core/hle/service/am/applets/controller.cpp
@@ -62,7 +62,7 @@ void Controller::Initialize() {
               common_args.play_startup_sound, common_args.size, common_args.system_tick,
               common_args.theme_color);
 
-    library_applet_version = LibraryAppletVersion{common_args.library_version};
+    controller_applet_version = ControllerAppletVersion{common_args.library_version};
 
     const auto private_arg_storage = broker.PopNormalDataToApplet();
     ASSERT(private_arg_storage != nullptr);
@@ -70,39 +70,78 @@ void Controller::Initialize() {
     const auto& private_arg = private_arg_storage->GetData();
     ASSERT(private_arg.size() == sizeof(ControllerSupportArgPrivate));
 
-    std::memcpy(&controller_private_arg, private_arg.data(), sizeof(ControllerSupportArgPrivate));
+    std::memcpy(&controller_private_arg, private_arg.data(), private_arg.size());
     ASSERT_MSG(controller_private_arg.arg_private_size == sizeof(ControllerSupportArgPrivate),
                "Unknown ControllerSupportArgPrivate revision={} with size={}",
-               library_applet_version, controller_private_arg.arg_private_size);
+               controller_applet_version, controller_private_arg.arg_private_size);
+
+    // Some games such as Cave Story+ set invalid values for the ControllerSupportMode.
+    // Defer to arg_size to set the ControllerSupportMode.
+    if (controller_private_arg.mode >= ControllerSupportMode::MaxControllerSupportMode) {
+        switch (controller_private_arg.arg_size) {
+        case sizeof(ControllerSupportArgOld):
+        case sizeof(ControllerSupportArgNew):
+            controller_private_arg.mode = ControllerSupportMode::ShowControllerSupport;
+            break;
+        case sizeof(ControllerUpdateFirmwareArg):
+            controller_private_arg.mode = ControllerSupportMode::ShowControllerFirmwareUpdate;
+            break;
+        default:
+            UNIMPLEMENTED_MSG("Unknown ControllerPrivateArg mode={} with arg_size={}",
+                              controller_private_arg.mode, controller_private_arg.arg_size);
+            controller_private_arg.mode = ControllerSupportMode::ShowControllerSupport;
+            break;
+        }
+    }
+
+    // Some games such as Cave Story+ set invalid values for the ControllerSupportCaller.
+    // This is always 0 (Application) except with ShowControllerFirmwareUpdateForSystem.
+    if (controller_private_arg.caller >= ControllerSupportCaller::MaxControllerSupportCaller) {
+        if (controller_private_arg.flag_1 &&
+            controller_private_arg.mode == ControllerSupportMode::ShowControllerFirmwareUpdate) {
+            controller_private_arg.caller = ControllerSupportCaller::System;
+        } else {
+            controller_private_arg.caller = ControllerSupportCaller::Application;
+        }
+    }
 
     switch (controller_private_arg.mode) {
-    case ControllerSupportMode::ShowControllerSupport: {
+    case ControllerSupportMode::ShowControllerSupport:
+    case ControllerSupportMode::ShowControllerStrapGuide: {
         const auto user_arg_storage = broker.PopNormalDataToApplet();
         ASSERT(user_arg_storage != nullptr);
 
         const auto& user_arg = user_arg_storage->GetData();
-        switch (library_applet_version) {
-        case LibraryAppletVersion::Version3:
-        case LibraryAppletVersion::Version4:
-        case LibraryAppletVersion::Version5:
+        switch (controller_applet_version) {
+        case ControllerAppletVersion::Version3:
+        case ControllerAppletVersion::Version4:
+        case ControllerAppletVersion::Version5:
             ASSERT(user_arg.size() == sizeof(ControllerSupportArgOld));
-            std::memcpy(&controller_user_arg_old, user_arg.data(), sizeof(ControllerSupportArgOld));
+            std::memcpy(&controller_user_arg_old, user_arg.data(), user_arg.size());
             break;
-        case LibraryAppletVersion::Version7:
+        case ControllerAppletVersion::Version7:
             ASSERT(user_arg.size() == sizeof(ControllerSupportArgNew));
-            std::memcpy(&controller_user_arg_new, user_arg.data(), sizeof(ControllerSupportArgNew));
+            std::memcpy(&controller_user_arg_new, user_arg.data(), user_arg.size());
             break;
         default:
             UNIMPLEMENTED_MSG("Unknown ControllerSupportArg revision={} with size={}",
-                              library_applet_version, controller_private_arg.arg_size);
+                              controller_applet_version, controller_private_arg.arg_size);
             ASSERT(user_arg.size() >= sizeof(ControllerSupportArgNew));
             std::memcpy(&controller_user_arg_new, user_arg.data(), sizeof(ControllerSupportArgNew));
             break;
         }
         break;
     }
-    case ControllerSupportMode::ShowControllerStrapGuide:
-    case ControllerSupportMode::ShowControllerFirmwareUpdate:
+    case ControllerSupportMode::ShowControllerFirmwareUpdate: {
+        const auto update_arg_storage = broker.PopNormalDataToApplet();
+        ASSERT(update_arg_storage != nullptr);
+
+        const auto& update_arg = update_arg_storage->GetData();
+        ASSERT(update_arg.size() == sizeof(ControllerUpdateFirmwareArg));
+
+        std::memcpy(&controller_update_arg, update_arg.data(), update_arg.size());
+        break;
+    }
     default: {
         UNIMPLEMENTED_MSG("Unimplemented ControllerSupportMode={}", controller_private_arg.mode);
         break;
@@ -126,10 +165,10 @@ void Controller::Execute() {
     switch (controller_private_arg.mode) {
     case ControllerSupportMode::ShowControllerSupport: {
         const auto parameters = [this] {
-            switch (library_applet_version) {
-            case LibraryAppletVersion::Version3:
-            case LibraryAppletVersion::Version4:
-            case LibraryAppletVersion::Version5:
+            switch (controller_applet_version) {
+            case ControllerAppletVersion::Version3:
+            case ControllerAppletVersion::Version4:
+            case ControllerAppletVersion::Version5:
                 return ConvertToFrontendParameters(
                     controller_private_arg, controller_user_arg_old.header,
                     controller_user_arg_old.enable_explain_text,
@@ -138,7 +177,7 @@ void Controller::Execute() {
                         controller_user_arg_old.identification_colors.end()),
                     std::vector<ExplainText>(controller_user_arg_old.explain_text.begin(),
                                              controller_user_arg_old.explain_text.end()));
-            case LibraryAppletVersion::Version7:
+            case ControllerAppletVersion::Version7:
             default:
                 return ConvertToFrontendParameters(
                     controller_private_arg, controller_user_arg_new.header,
@@ -170,6 +209,9 @@ void Controller::Execute() {
     }
     case ControllerSupportMode::ShowControllerStrapGuide:
     case ControllerSupportMode::ShowControllerFirmwareUpdate:
+        UNIMPLEMENTED_MSG("ControllerSupportMode={} is not implemented",
+                          controller_private_arg.mode);
+        [[fallthrough]];
     default: {
         ConfigurationComplete();
         break;
diff --git a/src/core/hle/service/am/applets/controller.h b/src/core/hle/service/am/applets/controller.h
index f7bb3fba9..a7a1f2b65 100644
--- a/src/core/hle/service/am/applets/controller.h
+++ b/src/core/hle/service/am/applets/controller.h
@@ -21,7 +21,7 @@ namespace Service::AM::Applets {
 using IdentificationColor = std::array<u8, 4>;
 using ExplainText = std::array<char, 0x81>;
 
-enum class LibraryAppletVersion : u32_le {
+enum class ControllerAppletVersion : u32_le {
     Version3 = 0x3, // 1.0.0 - 2.3.0
     Version4 = 0x4, // 3.0.0 - 5.1.0
     Version5 = 0x5, // 6.0.0 - 7.0.1
@@ -29,14 +29,18 @@ enum class LibraryAppletVersion : u32_le {
 };
 
 enum class ControllerSupportMode : u8 {
-    ShowControllerSupport = 0,
-    ShowControllerStrapGuide = 1,
-    ShowControllerFirmwareUpdate = 2,
+    ShowControllerSupport,
+    ShowControllerStrapGuide,
+    ShowControllerFirmwareUpdate,
+
+    MaxControllerSupportMode,
 };
 
 enum class ControllerSupportCaller : u8 {
-    Application = 0,
-    System = 1,
+    Application,
+    System,
+
+    MaxControllerSupportCaller,
 };
 
 struct ControllerSupportArgPrivate {
@@ -84,6 +88,13 @@ struct ControllerSupportArgNew {
 static_assert(sizeof(ControllerSupportArgNew) == 0x430,
               "ControllerSupportArgNew has incorrect size.");
 
+struct ControllerUpdateFirmwareArg {
+    bool enable_force_update{};
+    INSERT_PADDING_BYTES(3);
+};
+static_assert(sizeof(ControllerUpdateFirmwareArg) == 0x4,
+              "ControllerUpdateFirmwareArg has incorrect size.");
+
 struct ControllerSupportResultInfo {
     s8 player_count{};
     INSERT_PADDING_BYTES(3);
@@ -110,10 +121,11 @@ public:
 private:
     const Core::Frontend::ControllerApplet& frontend;
 
-    LibraryAppletVersion library_applet_version;
+    ControllerAppletVersion controller_applet_version;
     ControllerSupportArgPrivate controller_private_arg;
     ControllerSupportArgOld controller_user_arg_old;
     ControllerSupportArgNew controller_user_arg_new;
+    ControllerUpdateFirmwareArg controller_update_arg;
     bool complete{false};
     ResultCode status{RESULT_SUCCESS};
     bool is_single_mode{false};