Initial DSP debugger work

CMakeLists.txt

@@ -314,7 +314,7 @@ else()
     message(FATAL_ERROR "Currently unsupported CPU architecture")
 endif()
 
-add_subdirectory(third_party/teakra EXCLUDE_FROM_ALL)
+add_subdirectory(third_party/teakra)
 add_subdirectory(third_party/fdk-aac)
 
 set(CAPSTONE_ARCHITECTURE_DEFAULT OFF)
@@ -686,8 +686,8 @@ set(ALL_SOURCES ${SOURCE_FILES} ${FS_SOURCE_FILES} ${CRYPTO_SOURCE_FILES} ${KERN
     ${AUDIO_SOURCE_FILES} ${HEADER_FILES} ${FRONTEND_HEADER_FILES})
 target_sources(AlberCore PRIVATE ${ALL_SOURCES})
 
-target_link_libraries(AlberCore PRIVATE dynarmic glad resources_console_fonts teakra fdk-aac)
-target_link_libraries(AlberCore PUBLIC glad capstone fmt::fmt)
+target_link_libraries(AlberCore PRIVATE dynarmic glad resources_console_fonts fdk-aac)
+target_link_libraries(AlberCore PUBLIC glad capstone fmt::fmt teakra)
 
 if(ENABLE_DISCORD_RPC AND NOT ANDROID)
     target_compile_definitions(AlberCore PUBLIC "PANDA3DS_ENABLE_DISCORD_RPC=1")
@@ -733,12 +733,13 @@ if(NOT BUILD_HYDRA_CORE AND NOT BUILD_LIBRETRO_CORE)
         set(FRONTEND_SOURCE_FILES src/panda_qt/main.cpp src/panda_qt/screen.cpp src/panda_qt/main_window.cpp src/panda_qt/about_window.cpp
             src/panda_qt/config_window.cpp src/panda_qt/zep.cpp src/panda_qt/text_editor.cpp src/panda_qt/cheats_window.cpp src/panda_qt/mappings.cpp
             src/panda_qt/patch_window.cpp src/panda_qt/elided_label.cpp src/panda_qt/shader_editor.cpp src/panda_qt/translations.cpp
-            src/panda_qt/thread_debugger.cpp src/panda_qt/cpu_debugger.cpp
+            src/panda_qt/thread_debugger.cpp src/panda_qt/cpu_debugger.cpp src/panda_qt/dsp_debugger.cpp
         )
         set(FRONTEND_HEADER_FILES include/panda_qt/screen.hpp include/panda_qt/main_window.hpp include/panda_qt/about_window.hpp
             include/panda_qt/config_window.hpp include/panda_qt/text_editor.hpp include/panda_qt/cheats_window.hpp
             include/panda_qt/patch_window.hpp include/panda_qt/elided_label.hpp include/panda_qt/shader_editor.hpp
-            include/panda_qt/thread_debugger.hpp include/panda_qt/cpu_debugger.hpp include/panda_qt/disabled_widget_overlay.hpp
+            include/panda_qt/thread_debugger.hpp include/panda_qt/cpu_debugger.hpp include/panda_qt/dsp_debugger.hpp
+            include/panda_qt/disabled_widget_overlay.hpp
         )
 
         source_group("Source Files\\Qt" FILES ${FRONTEND_SOURCE_FILES})

include/audio/dsp_core.hpp

@@ -63,6 +63,8 @@ namespace Audio {
 
 		Samples& getSamples() { return sampleBuffer; }
 		virtual void setAudioEnabled(bool enable) { audioEnabled = enable; }
+
+		virtual u32 getPC() { return 0; }
 	};
 
 	std::unique_ptr<DSPCore> makeDSPCore(EmulatorConfig& config, Memory& mem, Scheduler& scheduler, DSPService& dspService);

include/audio/teakra_core.hpp

@@ -90,6 +90,7 @@ namespace Audio {
 
 		void setAudioEnabled(bool enable) override;
 		u8* getDspMemory() override { return teakra.GetDspMemory().data(); }
+		u32 getPC() override;
 
 		u16 recvData(u32 regId) override { return teakra.RecvData(regId); }
 		bool recvDataIsReady(u32 regId) override { return teakra.RecvDataIsReady(regId); }

include/emulator.hpp

@@ -126,6 +126,7 @@ class Emulator {
 	Memory& getMemory() { return memory; }
 	Kernel& getKernel() { return kernel; }
 	Scheduler& getScheduler() { return scheduler; }
+	Audio::DSPCore* getDSP() { return dsp.get(); }
 
 	EmulatorConfig& getConfig() { return config; }
 	Cheats& getCheats() { return cheats; }

include/panda_qt/dsp_debugger.hpp

@@ -0,0 +1,45 @@
+#pragma once
+#include <QLineEdit>
+#include <QListWidget>
+#include <QPlainTextEdit>
+#include <QScrollBar>
+#include <QWidget>
+
+#include "capstone.hpp"
+#include "emulator.hpp"
+#include "panda_qt/disabled_widget_overlay.hpp"
+
+class DSPDebugger : public QWidget {
+	Q_OBJECT
+	Emulator* emu;
+
+	QListWidget* disasmListWidget;
+	QScrollBar* verticalScrollBar;
+	QPlainTextEdit* registerTextEdit;
+	QTimer* updateTimer;
+	QLineEdit* addressInput;
+
+	DisabledWidgetOverlay* disabledOverlay;
+
+	bool enabled = false;
+	bool followPC = false;
+	Common::CapstoneDisassembler disassembler;
+
+  public:
+	DSPDebugger(Emulator* emulator, QWidget* parent = nullptr);
+	void enable();
+	void disable();
+
+  private:
+	// Update the state of the disassembler. Qt events should always call update, not updateDisasm/updateRegister
+	// As update properly handles thread safety
+	void update();
+	void updateDisasm();
+	void updateRegisters();
+	void scrollToPC();
+
+	bool eventFilter(QObject* obj, QEvent* event) override;
+	void showEvent(QShowEvent* event) override;
+	void resizeEvent(QResizeEvent* event) override;
+	void keyPressEvent(QKeyEvent* event) override;
+};

include/panda_qt/main_window.hpp

@@ -18,6 +18,7 @@
 #include "panda_qt/cheats_window.hpp"
 #include "panda_qt/config_window.hpp"
 #include "panda_qt/cpu_debugger.hpp"
+#include "panda_qt/dsp_debugger.hpp"
 #include "panda_qt/patch_window.hpp"
 #include "panda_qt/screen.hpp"
 #include "panda_qt/shader_editor.hpp"
@@ -112,6 +113,7 @@ class MainWindow : public QMainWindow {
 	PatchWindow* patchWindow;
 	ShaderEditorWindow* shaderEditor;
 	CPUDebugger* cpuDebugger;
+	DSPDebugger* dspDebugger;
 	ThreadDebugger* threadDebugger;
 
 	// We use SDL's game controller API since it's the sanest API that supports as many controllers as possible

src/core/audio/teakra_core.cpp

@@ -7,6 +7,10 @@
 
 #include "services/dsp.hpp"
 
+#undef Assert
+#undef UNREACHABLE
+#include "teakra/impl/register.h"
+
 using namespace Audio;
 
 struct Dsp1 {
@@ -343,3 +347,5 @@ void TeakraDSP::unloadComponent() {
 	teakra.RecvData(2);
 	running = false;
 }
+
+u32 TeakraDSP::getPC() { return teakra.GetRegisterState().pc; }

src/panda_qt/dsp_debugger.cpp

@@ -0,0 +1,242 @@
+#include "panda_qt/dsp_debugger.hpp"
+
+#include <fmt/format.h>
+
+#include <QCheckBox>
+#include <QGridLayout>
+#include <QHBoxLayout>
+#include <QListWidget>
+#include <QPlainTextEdit>
+#include <QPushButton>
+#include <limits>
+#include <span>
+#include <utility>
+
+#include "teakra/disassembler.h"
+
+// TODO: Make this actually thread-safe by having it only work when paused
+static int getLinesInViewport(QListWidget* listWidget) {
+	auto viewportHeight = listWidget->viewport()->height();
+	QFontMetrics fm = QFontMetrics(listWidget->font());
+	auto lineHeight = fm.height();
+
+	return int(viewportHeight / lineHeight);
+}
+
+static std::pair<int, int> getVisibleLineRange(QListWidget* listWidget, QScrollBar* scrollBar) {
+	int firstLine = scrollBar->value();
+	int lineCount = getLinesInViewport(listWidget);
+
+	return {firstLine, lineCount};
+}
+
+DSPDebugger::DSPDebugger(Emulator* emulator, QWidget* parent) : emu(emulator), disassembler(CS_ARCH_ARM, CS_MODE_ARM), QWidget(parent, Qt::Window) {
+	setWindowTitle(tr("DSP debugger"));
+	resize(1000, 600);
+
+	QGridLayout* gridLayout = new QGridLayout(this);
+	QHBoxLayout* horizontalLayout = new QHBoxLayout();
+
+	// Set up the top line widgets
+	QPushButton* goToAddressButton = new QPushButton(tr("Go to address"), this);
+	QPushButton* goToPCButton = new QPushButton(tr("Go to PC"), this);
+	QCheckBox* followPCCheckBox = new QCheckBox(tr("Follow PC"), this);
+	addressInput = new QLineEdit(this);
+
+	horizontalLayout->addWidget(goToAddressButton);
+	horizontalLayout->addWidget(goToPCButton);
+	horizontalLayout->addWidget(followPCCheckBox);
+	horizontalLayout->addWidget(addressInput);
+
+	followPCCheckBox->setChecked(followPC);
+	connect(followPCCheckBox, &QCheckBox::toggled, this, [&](bool checked) { followPC = checked; });
+
+	addressInput->setPlaceholderText(tr("Address to jump to"));
+	addressInput->setMaximumWidth(150);
+
+	gridLayout->addLayout(horizontalLayout, 0, 0);
+
+	// Disassembly list on the left, scrollbar in the middle, register view on the right
+	disasmListWidget = new QListWidget(this);
+	gridLayout->addWidget(disasmListWidget, 1, 0);
+
+	verticalScrollBar = new QScrollBar(Qt::Vertical, this);
+	gridLayout->addWidget(verticalScrollBar, 1, 1);
+
+	registerTextEdit = new QPlainTextEdit(this);
+	registerTextEdit->setEnabled(true);
+	registerTextEdit->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
+	registerTextEdit->setMaximumWidth(800);
+	gridLayout->addWidget(registerTextEdit, 1, 2);
+
+	// Setup overlay for when the widget is disabled
+	disabledOverlay = new DisabledWidgetOverlay(this, tr("Pause the emulator to use the DSP Debugger"));
+	disabledOverlay->resize(size());  // Fill the whole screen
+	disabledOverlay->raise();
+	disabledOverlay->hide();
+
+	// Use a monospace font for the disassembly to align it
+	QFont mono_font = QFont("Courier New");
+	mono_font.setStyleHint(QFont::Monospace);
+	disasmListWidget->setFont(mono_font);
+	registerTextEdit->setFont(mono_font);
+
+	// Forward scrolling from the list widget to our scrollbar
+	disasmListWidget->installEventFilter(this);
+
+	// Annoyingly, due to a Qt limitation we can't set it to U32_MAX
+	verticalScrollBar->setRange(0, std::numeric_limits<s32>::max());
+	verticalScrollBar->setSingleStep(8);
+	verticalScrollBar->setPageStep(getLinesInViewport(disasmListWidget));
+	verticalScrollBar->show();
+	connect(verticalScrollBar, &QScrollBar::valueChanged, this, &DSPDebugger::updateDisasm);
+	registerTextEdit->setReadOnly(true);
+
+	connect(goToPCButton, &QPushButton::clicked, this, [&]() { scrollToPC(); });
+
+	// We have a QTimer that triggers every 500ms to update our widget when it's active
+	updateTimer = new QTimer(this);
+	connect(updateTimer, &QTimer::timeout, this, &DSPDebugger::update);
+
+	// Go to address when the "Go to address" button is pressed, or when we press enter inside the address input box
+	connect(goToAddressButton, &QPushButton::clicked, this, [&]() {
+		QString text = addressInput->text().trimmed();
+
+		bool validAddr = false;
+		u32 addr = text.toUInt(&validAddr, 16);  // Parse address as hex
+		if (validAddr) {
+			verticalScrollBar->setValue(addr);
+		} else {
+			addressInput->setText(tr("Invalid hexadecimal address"));
+		}
+	});
+	connect(addressInput, &QLineEdit::returnPressed, goToAddressButton, &QPushButton::click);
+
+	disable();
+	hide();
+}
+
+void DSPDebugger::enable() {
+	enabled = true;
+
+	disabledOverlay->hide();
+	scrollToPC();
+
+	// Update the widget every 500ms
+	updateTimer->start(500);
+	update();
+}
+
+void DSPDebugger::disable() {
+	enabled = false;
+
+	updateTimer->stop();
+	disabledOverlay->show();
+}
+
+void DSPDebugger::update() {
+	if (enabled) {
+		if (followPC) {
+			scrollToPC();
+		}
+
+		updateDisasm();
+		updateRegisters();
+	}
+}
+
+void DSPDebugger::updateDisasm() {
+	int currentRow = disasmListWidget->currentRow();
+	disasmListWidget->clear();
+
+	auto [firstLine, lineCount] = getVisibleLineRange(disasmListWidget, verticalScrollBar);
+	const u32 startPC = (firstLine + 1) & ~1;  // Align PC to 2 bytes
+
+	auto DSP = emu->getDSP();
+	auto dspRam = DSP->getDspMemory();
+	auto readByte = [&](u32 addr) {
+		if (addr >= 256_KB) return u8(0);
+
+		return dspRam[addr];
+	};
+
+	auto readWord = [&](u32 addr) {
+		u16 lsb = u16(readByte(addr));
+		u16 msb = u16(readByte(addr + 1));
+		return u16(lsb | (msb << 8));
+	};
+
+	auto& mem = emu->getMemory();
+	u32 pc = DSP->getPC();
+
+	std::string disassembly;
+
+	for (u32 addr = startPC, instructionCount = 0; instructionCount < lineCount; instructionCount++) {
+		const u16 instruction = readWord(addr);
+		const bool needExpansion = Teakra::Disassembler::NeedExpansion(instruction);
+
+		const u16 expansion = needExpansion ? readWord(addr + 2) : u16(0);
+		addr += needExpansion ? sizeof(u32) : sizeof(u16);
+
+		std::string disassembly = Teakra::Disassembler::Do(instruction, expansion);
+		disassembly = fmt::format("{:08X}     |     {}", addr, disassembly);
+
+		QListWidgetItem* item = new QListWidgetItem(QString::fromStdString(disassembly));
+		if (addr == pc) {
+			item->setBackground(Qt::darkGreen);
+		}
+		disasmListWidget->addItem(item);
+	}
+
+	disasmListWidget->setCurrentRow(currentRow);
+}
+
+void DSPDebugger::scrollToPC() {
+	u32 pc = emu->getDSP()->getPC();
+	verticalScrollBar->setValue(pc);
+}
+
+void DSPDebugger::updateRegisters() { registerTextEdit->setPlainText(QString::fromStdString("")); }
+
+bool DSPDebugger::eventFilter(QObject* obj, QEvent* event) {
+	// Forward scroll events from the list widget to the scrollbar
+	if (obj == disasmListWidget && event->type() == QEvent::Wheel) {
+		QWheelEvent* wheelEvent = (QWheelEvent*)event;
+
+		int wheelSteps = wheelEvent->angleDelta().y() / 60;
+		int newScrollValue = verticalScrollBar->value() - wheelSteps;
+		newScrollValue = qBound(verticalScrollBar->minimum(), newScrollValue, verticalScrollBar->maximum());
+		verticalScrollBar->setValue(newScrollValue);
+
+		return true;
+	}
+
+	return QWidget::eventFilter(obj, event);
+}
+
+void DSPDebugger::showEvent(QShowEvent* event) {
+	QWidget::showEvent(event);
+
+	enable();
+}
+
+// Scroll 1 instruction up or down when the arrow keys are pressed and we're at the edge of the disassembly list
+void DSPDebugger::keyPressEvent(QKeyEvent* event) {
+	constexpr usize instructionSize = sizeof(u16);
+
+	if (event->key() == Qt::Key_Up) {
+		verticalScrollBar->setValue(verticalScrollBar->value() - instructionSize);
+	} else if (event->key() == Qt::Key_Down) {
+		verticalScrollBar->setValue(verticalScrollBar->value() + instructionSize);
+	} else {
+		QWidget::keyPressEvent(event);
+	}
+}
+
+void DSPDebugger::resizeEvent(QResizeEvent* event) {
+	QWidget::resizeEvent(event);
+	disabledOverlay->resize(event->size());
+	verticalScrollBar->setPageStep(getLinesInViewport(disasmListWidget));
+
+	update();
+}

src/panda_qt/main_window.cpp

@@ -9,6 +9,7 @@
 
 #include "cheats.hpp"
 #include "input_mappings.hpp"
+#include "panda_qt/dsp_debugger.hpp"
 #include "sdl_sensors.hpp"
 #include "services/dsp.hpp"
 #include "version.hpp"
@@ -67,6 +68,7 @@ MainWindow::MainWindow(QApplication* app, QWidget* parent) : QMainWindow(parent)
 	auto patchWindowAction = toolsMenu->addAction(tr("Open Patch Window"));
 	auto shaderEditorAction = toolsMenu->addAction(tr("Open Shader Editor"));
 	auto cpuDebuggerAction = toolsMenu->addAction(tr("Open CPU Debugger"));
+	auto dspDebuggerAction = toolsMenu->addAction(tr("Open DSP Debugger"));
 	auto threadDebuggerAction = toolsMenu->addAction(tr("Open Thread Debugger"));
 	auto dumpDspFirmware = toolsMenu->addAction(tr("Dump loaded DSP firmware"));
 
@@ -76,6 +78,7 @@ MainWindow::MainWindow(QApplication* app, QWidget* parent) : QMainWindow(parent)
 	connect(cheatsEditorAction, &QAction::triggered, this, [this]() { cheatsEditor->show(); });
 	connect(patchWindowAction, &QAction::triggered, this, [this]() { patchWindow->show(); });
 	connect(cpuDebuggerAction, &QAction::triggered, this, [this]() { cpuDebugger->show(); });
+	connect(dspDebuggerAction, &QAction::triggered, this, [this]() { dspDebugger->show(); });
 	connect(threadDebuggerAction, &QAction::triggered, this, [this]() { threadDebugger->show(); });
 	connect(dumpDspFirmware, &QAction::triggered, this, &MainWindow::dumpDspFirmware);
 
@@ -97,6 +100,7 @@ MainWindow::MainWindow(QApplication* app, QWidget* parent) : QMainWindow(parent)
 	shaderEditor = new ShaderEditorWindow(this, "shader.glsl", "");
 	threadDebugger = new ThreadDebugger(emu, this);
 	cpuDebugger = new CPUDebugger(emu, this);
+	dspDebugger = new DSPDebugger(emu, this);
 
 	shaderEditor->setEnable(emu->getRenderer()->supportsShaderReload());
 	if (shaderEditor->supported) {