fix(windows): add experimental guest red-zone protection.

Port the static instruction patcher from shadPS4.

src/launcher/forms/configuration_edit_dialog.ui

@@ -88,6 +88,16 @@
            </property>
           </widget>
          </item>
+         <item row="2" column="1">
+          <widget class="QCheckBox" name="checkBox_red_zone_protection">
+           <property name="toolTip">
+            <string>Helps prevent crashes in some games on Windows</string>
+           </property>
+           <property name="text">
+            <string>Windows SysV red zone crash protection (Experimental)</string>
+           </property>
+          </widget>
+         </item>
         </layout>
        </widget>
       </item>

src/launcher/include/configuration.h

@@ -99,7 +99,10 @@ public:
 	QString                printf_output_file          = "_kyty.txt";
 	ProfilerDirection      profiler_direction          = ProfilerDirection::None;
 	bool                   renderdoc_enabled           = false;
-	QStringList            host_input_mapping;
+#if defined(_WIN32)
+	bool red_zone_protection_enabled = false;
+#endif
+	QStringList host_input_mapping;
 
 	QString elf = QStringLiteral("eboot.bin");
 
@@ -119,7 +122,10 @@ public:
 		printf_output_file          = other.printf_output_file;
 		profiler_direction          = other.profiler_direction;
 		renderdoc_enabled           = other.renderdoc_enabled;
-		host_input_mapping          = other.host_input_mapping;
+#if defined(_WIN32)
+		red_zone_protection_enabled = other.red_zone_protection_enabled;
+#endif
+		host_input_mapping = other.host_input_mapping;
 	}
 
 	void CopyFrom(const Configuration& other) {
@@ -156,6 +162,9 @@ public:
 		KYTY_CFG_SET(printf_output_file);
 		KYTY_CFG_SET(profiler_direction);
 		KYTY_CFG_SET(renderdoc_enabled);
+#if defined(_WIN32)
+		KYTY_CFG_SET(red_zone_protection_enabled);
+#endif
 		s->setValue("host_input_mapping", host_input_mapping);
 		KYTY_CFG_SET(elf);
 	}
@@ -183,6 +192,10 @@ public:
 		KYTY_CFG_GET(printf_output_file);
 		KYTY_CFG_GET(profiler_direction);
 		KYTY_CFG_GET(renderdoc_enabled);
+#if defined(_WIN32)
+		red_zone_protection_enabled =
+		    s->value("red_zone_protection_enabled", red_zone_protection_enabled).toBool();
+#endif
 		host_input_mapping = s->value("host_input_mapping", host_input_mapping).toStringList();
 		elf                = s->value("elf", elf).toString();
 	}

src/launcher/src/configurationEditDialog.cpp

@@ -164,6 +164,11 @@ void ConfigurationEditDialog::Init(const Configuration& info) {
 	m_ui->checkBox_shader_validation->setChecked(info.shader_validation_enabled);
 	m_ui->checkBox_vulkan_validation->setChecked(info.vulkan_validation_enabled);
 	m_ui->checkBox_renderdoc_capture->setChecked(info.renderdoc_enabled);
+#if defined(_WIN32)
+	m_ui->checkBox_red_zone_protection->setChecked(info.red_zone_protection_enabled);
+#else
+	m_ui->checkBox_red_zone_protection->setVisible(false);
+#endif
 	ListInit(m_ui->comboBox_shader_optimization_type, info.shader_optimization_type);
 	ListInit(m_ui->comboBox_shader_log_direction, info.shader_log_direction);
 	m_ui->lineEdit_shader_log_folder->setText(info.shader_log_folder);
@@ -286,7 +291,10 @@ static void UpdateInfo(Configuration& info, Ui::ConfigurationEditDialog& ui) {
 	info.vulkan_validation_enabled = ui.checkBox_vulkan_validation->isChecked();
 	info.shader_validation_enabled = ui.checkBox_shader_validation->isChecked();
 	info.renderdoc_enabled         = ui.checkBox_renderdoc_capture->isChecked();
-	info.shader_optimization_type  = TextToEnum<Configuration::ShaderOptimizationType>(
+#if defined(_WIN32)
+	info.red_zone_protection_enabled = ui.checkBox_red_zone_protection->isChecked();
+#endif
+	info.shader_optimization_type = TextToEnum<Configuration::ShaderOptimizationType>(
 	    ui.comboBox_shader_optimization_type->currentText());
 	info.shader_log_direction = TextToEnum<Configuration::ShaderLogDirection>(
 	    ui.comboBox_shader_log_direction->currentText());

src/launcher/src/mainDialog.cpp

@@ -220,6 +220,11 @@ static QStringList CreateEmulatorArgs(const Configuration& info) {
 	args << "--printf-output-file" << info.printf_output_file;
 	args << "--profiler-direction" << EnumToText(info.profiler_direction);
 	args << "--spirv-debug-printf" << "false";
+#if defined(_WIN32)
+	if (info.red_zone_protection_enabled) {
+		args << "--redzone";
+	}
+#endif
 	for (const auto& binding: info.host_input_mapping) {
 		args << "--keymap" << binding;
 	}