258 lines
8.4 KiB
C++
258 lines
8.4 KiB
C++
#include "disassembler.hxx"
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#include "../bootmanager.hxx"
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#include "../hotkeys.hxx"
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#include "common/common.h"
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#include "core/mem_map.h"
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#include "core/core.h"
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#include "common/break_points.h"
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#include "common/symbols.h"
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#include "core/arm/interpreter/armdefs.h"
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#include "core/arm/disassembler/arm_disasm.h"
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DisassemblerModel::DisassemblerModel(QObject* parent) : QAbstractItemModel(parent), base_address(0), code_size(0), program_counter(0), selection(QModelIndex()) {
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}
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QModelIndex DisassemblerModel::index(int row, int column, const QModelIndex& parent) const {
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return createIndex(row, column);
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}
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QModelIndex DisassemblerModel::parent(const QModelIndex& child) const {
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return QModelIndex();
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}
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int DisassemblerModel::columnCount(const QModelIndex& parent) const {
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return 3;
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}
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int DisassemblerModel::rowCount(const QModelIndex& parent) const {
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return code_size;
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}
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QVariant DisassemblerModel::data(const QModelIndex& index, int role) const {
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switch (role) {
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case Qt::DisplayRole:
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{
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static char result[255];
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u32 address = base_address + index.row() * 4;
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u32 instr = Memory::Read32(address);
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ARM_Disasm::disasm(address, instr, result);
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if (index.column() == 0) {
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return QString("0x%1").arg((uint)(address), 8, 16, QLatin1Char('0'));
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} else if (index.column() == 1) {
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return QString::fromLatin1(result);
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} else if (index.column() == 2) {
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if(Symbols::HasSymbol(address)) {
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TSymbol symbol = Symbols::GetSymbol(address);
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return QString("%1 - Size:%2").arg(QString::fromStdString(symbol.name))
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.arg(symbol.size / 4); // divide by 4 to get instruction count
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} else if (ARM_Disasm::decode(instr) == OP_BL) {
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u32 offset = instr & 0xFFFFFF;
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// Sign-extend the 24-bit offset
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if ((offset >> 23) & 1)
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offset |= 0xFF000000;
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// Pre-compute the left-shift and the prefetch offset
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offset <<= 2;
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offset += 8;
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TSymbol symbol = Symbols::GetSymbol(address + offset);
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return QString(" --> %1").arg(QString::fromStdString(symbol.name));
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}
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}
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break;
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}
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case Qt::BackgroundRole:
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{
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unsigned int address = base_address + 4 * index.row();
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if (breakpoints.IsAddressBreakPoint(address))
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return QBrush(QColor(0xFF, 0xC0, 0xC0));
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else if (address == program_counter)
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return QBrush(QColor(0xC0, 0xC0, 0xFF));
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break;
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}
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default:
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break;
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}
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return QVariant();
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}
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QModelIndex DisassemblerModel::IndexFromAbsoluteAddress(unsigned int address) const {
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return index((address - base_address) / 4, 0);
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}
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const BreakPoints& DisassemblerModel::GetBreakPoints() const {
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return breakpoints;
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}
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void DisassemblerModel::ParseFromAddress(unsigned int address) {
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// NOTE: A too large value causes lagging when scrolling the disassembly
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const unsigned int chunk_size = 1000*500;
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// If we haven't loaded anything yet, initialize base address to the parameter address
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if (code_size == 0)
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base_address = address;
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// If the new area is already loaded, just continue
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if (base_address + code_size > address + chunk_size && base_address <= address)
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return;
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// Insert rows before currently loaded data
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if (base_address > address) {
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unsigned int num_rows = (address - base_address) / 4;
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beginInsertRows(QModelIndex(), 0, num_rows);
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code_size += num_rows;
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base_address = address;
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endInsertRows();
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}
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// Insert rows after currently loaded data
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if (base_address + code_size < address + chunk_size) {
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unsigned int num_rows = (base_address + chunk_size - code_size - address) / 4;
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beginInsertRows(QModelIndex(), 0, num_rows);
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code_size += num_rows;
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endInsertRows();
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}
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SetNextInstruction(address);
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}
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void DisassemblerModel::OnSelectionChanged(const QModelIndex& new_selection) {
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selection = new_selection;
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}
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void DisassemblerModel::OnSetOrUnsetBreakpoint() {
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if (!selection.isValid())
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return;
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unsigned int address = base_address + selection.row() * 4;
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if (breakpoints.IsAddressBreakPoint(address)) {
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breakpoints.Remove(address);
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} else {
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breakpoints.Add(address);
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}
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emit dataChanged(selection, selection);
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}
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void DisassemblerModel::SetNextInstruction(unsigned int address) {
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QModelIndex cur_index = IndexFromAbsoluteAddress(program_counter);
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QModelIndex prev_index = IndexFromAbsoluteAddress(address);
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program_counter = address;
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emit dataChanged(cur_index, cur_index);
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emit dataChanged(prev_index, prev_index);
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}
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DisassemblerWidget::DisassemblerWidget(QWidget* parent, EmuThread& emu_thread) : QDockWidget(parent), base_addr(0), emu_thread(emu_thread)
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{
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disasm_ui.setupUi(this);
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model = new DisassemblerModel(this);
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disasm_ui.treeView->setModel(model);
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RegisterHotkey("Disassembler", "Start/Stop", QKeySequence(Qt::Key_F5), Qt::ApplicationShortcut);
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RegisterHotkey("Disassembler", "Step", QKeySequence(Qt::Key_F10), Qt::ApplicationShortcut);
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RegisterHotkey("Disassembler", "Step into", QKeySequence(Qt::Key_F11), Qt::ApplicationShortcut);
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RegisterHotkey("Disassembler", "Set Breakpoint", QKeySequence(Qt::Key_F9), Qt::ApplicationShortcut);
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connect(disasm_ui.button_breakpoint, SIGNAL(clicked()), model, SLOT(OnSetOrUnsetBreakpoint()));
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connect(disasm_ui.button_step, SIGNAL(clicked()), this, SLOT(OnStep()));
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connect(disasm_ui.button_pause, SIGNAL(clicked()), this, SLOT(OnPause()));
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connect(disasm_ui.button_continue, SIGNAL(clicked()), this, SLOT(OnContinue()));
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connect(disasm_ui.treeView->selectionModel(), SIGNAL(currentChanged(const QModelIndex&, const QModelIndex&)),
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model, SLOT(OnSelectionChanged(const QModelIndex&)));
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connect(GetHotkey("Disassembler", "Start/Stop", this), SIGNAL(activated()), this, SLOT(OnToggleStartStop()));
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connect(GetHotkey("Disassembler", "Step", this), SIGNAL(activated()), this, SLOT(OnStep()));
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connect(GetHotkey("Disassembler", "Step into", this), SIGNAL(activated()), this, SLOT(OnStepInto()));
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connect(GetHotkey("Disassembler", "Set Breakpoint", this), SIGNAL(activated()), model, SLOT(OnSetOrUnsetBreakpoint()));
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}
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void DisassemblerWidget::Init()
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{
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model->ParseFromAddress(Core::g_app_core->GetPC());
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disasm_ui.treeView->resizeColumnToContents(0);
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disasm_ui.treeView->resizeColumnToContents(1);
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disasm_ui.treeView->resizeColumnToContents(2);
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QModelIndex model_index = model->IndexFromAbsoluteAddress(Core::g_app_core->GetPC());
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disasm_ui.treeView->scrollTo(model_index);
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disasm_ui.treeView->selectionModel()->setCurrentIndex(model_index, QItemSelectionModel::SelectCurrent | QItemSelectionModel::Rows);
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}
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void DisassemblerWidget::OnContinue()
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{
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emu_thread.SetCpuRunning(true);
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}
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void DisassemblerWidget::OnStep()
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{
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OnStepInto(); // change later
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}
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void DisassemblerWidget::OnStepInto()
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{
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emu_thread.SetCpuRunning(false);
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emu_thread.ExecStep();
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}
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void DisassemblerWidget::OnPause()
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{
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emu_thread.SetCpuRunning(false);
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// TODO: By now, the CPU might not have actually stopped...
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model->SetNextInstruction(Core::g_app_core->GetPC());
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}
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void DisassemblerWidget::OnToggleStartStop()
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{
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emu_thread.SetCpuRunning(!emu_thread.IsCpuRunning());
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}
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void DisassemblerWidget::OnCPUStepped()
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{
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ARMword next_instr = Core::g_app_core->GetPC();
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// TODO: Make BreakPoints less crappy (i.e. const-correct) so that this doesn't need a const_cast.
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if (const_cast<BreakPoints&>(model->GetBreakPoints()).IsAddressBreakPoint(next_instr))
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{
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emu_thread.SetCpuRunning(false);
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}
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model->SetNextInstruction(next_instr);
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QModelIndex model_index = model->IndexFromAbsoluteAddress(next_instr);
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disasm_ui.treeView->scrollTo(model_index);
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disasm_ui.treeView->selectionModel()->setCurrentIndex(model_index, QItemSelectionModel::SelectCurrent | QItemSelectionModel::Rows);
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}
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int DisassemblerWidget::SelectedRow()
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{
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QModelIndex index = disasm_ui.treeView->selectionModel()->currentIndex();
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if (!index.isValid())
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return -1;
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return disasm_ui.treeView->selectionModel()->currentIndex().row();
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}
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