citra/src/citra_qt/debugger/disassembler.cpp

261 lines
8.5 KiB
C++

// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "disassembler.h"
#include "../bootmanager.h"
#include "../hotkeys.h"
#include "common/common.h"
#include "core/mem_map.h"
#include "core/core.h"
#include "common/break_points.h"
#include "common/symbols.h"
#include "core/arm/arm_interface.h"
#include "core/arm/skyeye_common/armdefs.h"
#include "core/arm/disassembler/arm_disasm.h"
DisassemblerModel::DisassemblerModel(QObject* parent) : QAbstractListModel(parent), base_address(0), code_size(0), program_counter(0), selection(QModelIndex()) {
}
int DisassemblerModel::columnCount(const QModelIndex& parent) const {
return 3;
}
int DisassemblerModel::rowCount(const QModelIndex& parent) const {
return code_size;
}
QVariant DisassemblerModel::data(const QModelIndex& index, int role) const {
switch (role) {
case Qt::DisplayRole:
{
u32 address = base_address + index.row() * 4;
u32 instr = Memory::Read32(address);
std::string disassembly = ARM_Disasm::Disassemble(address, instr);
if (index.column() == 0) {
return QString("0x%1").arg((uint)(address), 8, 16, QLatin1Char('0'));
} else if (index.column() == 1) {
return QString::fromStdString(disassembly);
} else if (index.column() == 2) {
if(Symbols::HasSymbol(address)) {
TSymbol symbol = Symbols::GetSymbol(address);
return QString("%1 - Size:%2").arg(QString::fromStdString(symbol.name))
.arg(symbol.size / 4); // divide by 4 to get instruction count
} else if (ARM_Disasm::Decode(instr) == OP_BL) {
u32 offset = instr & 0xFFFFFF;
// Sign-extend the 24-bit offset
if ((offset >> 23) & 1)
offset |= 0xFF000000;
// Pre-compute the left-shift and the prefetch offset
offset <<= 2;
offset += 8;
TSymbol symbol = Symbols::GetSymbol(address + offset);
return QString(" --> %1").arg(QString::fromStdString(symbol.name));
}
}
break;
}
case Qt::BackgroundRole:
{
unsigned int address = base_address + 4 * index.row();
if (breakpoints.IsAddressBreakPoint(address))
return QBrush(QColor(0xFF, 0xC0, 0xC0));
else if (address == program_counter)
return QBrush(QColor(0xC0, 0xC0, 0xFF));
break;
}
default:
break;
}
return QVariant();
}
QModelIndex DisassemblerModel::IndexFromAbsoluteAddress(unsigned int address) const {
return index((address - base_address) / 4, 0);
}
const BreakPoints& DisassemblerModel::GetBreakPoints() const {
return breakpoints;
}
void DisassemblerModel::ParseFromAddress(unsigned int address) {
// NOTE: A too large value causes lagging when scrolling the disassembly
const unsigned int chunk_size = 1000*500;
// If we haven't loaded anything yet, initialize base address to the parameter address
if (code_size == 0)
base_address = address;
// If the new area is already loaded, just continue
if (base_address + code_size > address + chunk_size && base_address <= address)
return;
// Insert rows before currently loaded data
if (base_address > address) {
unsigned int num_rows = (address - base_address) / 4;
beginInsertRows(QModelIndex(), 0, num_rows);
code_size += num_rows;
base_address = address;
endInsertRows();
}
// Insert rows after currently loaded data
if (base_address + code_size < address + chunk_size) {
unsigned int num_rows = (base_address + chunk_size - code_size - address) / 4;
beginInsertRows(QModelIndex(), 0, num_rows);
code_size += num_rows;
endInsertRows();
}
SetNextInstruction(address);
}
void DisassemblerModel::OnSelectionChanged(const QModelIndex& new_selection) {
selection = new_selection;
}
void DisassemblerModel::OnSetOrUnsetBreakpoint() {
if (!selection.isValid())
return;
unsigned int address = base_address + selection.row() * 4;
if (breakpoints.IsAddressBreakPoint(address)) {
breakpoints.Remove(address);
} else {
breakpoints.Add(address);
}
emit dataChanged(selection, selection);
}
void DisassemblerModel::SetNextInstruction(unsigned int address) {
QModelIndex cur_index = IndexFromAbsoluteAddress(program_counter);
QModelIndex prev_index = IndexFromAbsoluteAddress(address);
program_counter = address;
emit dataChanged(cur_index, cur_index);
emit dataChanged(prev_index, prev_index);
}
DisassemblerWidget::DisassemblerWidget(QWidget* parent, EmuThread& emu_thread) : QDockWidget(parent), base_addr(0), emu_thread(emu_thread)
{
disasm_ui.setupUi(this);
model = new DisassemblerModel(this);
disasm_ui.treeView->setModel(model);
RegisterHotkey("Disassembler", "Start/Stop", QKeySequence(Qt::Key_F5), Qt::ApplicationShortcut);
RegisterHotkey("Disassembler", "Step", QKeySequence(Qt::Key_F10), Qt::ApplicationShortcut);
RegisterHotkey("Disassembler", "Step into", QKeySequence(Qt::Key_F11), Qt::ApplicationShortcut);
RegisterHotkey("Disassembler", "Set Breakpoint", QKeySequence(Qt::Key_F9), Qt::ApplicationShortcut);
connect(disasm_ui.button_breakpoint, SIGNAL(clicked()), model, SLOT(OnSetOrUnsetBreakpoint()));
connect(disasm_ui.button_step, SIGNAL(clicked()), this, SLOT(OnStep()));
connect(disasm_ui.button_pause, SIGNAL(clicked()), this, SLOT(OnPause()));
connect(disasm_ui.button_continue, SIGNAL(clicked()), this, SLOT(OnContinue()));
connect(disasm_ui.treeView->selectionModel(), SIGNAL(currentChanged(const QModelIndex&, const QModelIndex&)),
model, SLOT(OnSelectionChanged(const QModelIndex&)));
connect(GetHotkey("Disassembler", "Start/Stop", this), SIGNAL(activated()), this, SLOT(OnToggleStartStop()));
connect(GetHotkey("Disassembler", "Step", this), SIGNAL(activated()), this, SLOT(OnStep()));
connect(GetHotkey("Disassembler", "Step into", this), SIGNAL(activated()), this, SLOT(OnStepInto()));
connect(GetHotkey("Disassembler", "Set Breakpoint", this), SIGNAL(activated()), model, SLOT(OnSetOrUnsetBreakpoint()));
}
void DisassemblerWidget::Init()
{
model->ParseFromAddress(Core::g_app_core->GetPC());
disasm_ui.treeView->resizeColumnToContents(0);
disasm_ui.treeView->resizeColumnToContents(1);
disasm_ui.treeView->resizeColumnToContents(2);
QModelIndex model_index = model->IndexFromAbsoluteAddress(Core::g_app_core->GetPC());
disasm_ui.treeView->scrollTo(model_index);
disasm_ui.treeView->selectionModel()->setCurrentIndex(model_index, QItemSelectionModel::SelectCurrent | QItemSelectionModel::Rows);
}
void DisassemblerWidget::OnContinue()
{
emu_thread.SetCpuRunning(true);
}
void DisassemblerWidget::OnStep()
{
OnStepInto(); // change later
}
void DisassemblerWidget::OnStepInto()
{
emu_thread.SetCpuRunning(false);
emu_thread.ExecStep();
}
void DisassemblerWidget::OnPause()
{
emu_thread.SetCpuRunning(false);
// TODO: By now, the CPU might not have actually stopped...
if (Core::g_app_core) {
model->SetNextInstruction(Core::g_app_core->GetPC());
}
}
void DisassemblerWidget::OnToggleStartStop()
{
emu_thread.SetCpuRunning(!emu_thread.IsCpuRunning());
}
void DisassemblerWidget::OnDebugModeEntered()
{
ARMword next_instr = Core::g_app_core->GetPC();
// TODO: Make BreakPoints less crappy (i.e. const-correct) so that this doesn't need a const_cast.
if (const_cast<BreakPoints&>(model->GetBreakPoints()).IsAddressBreakPoint(next_instr))
{
emu_thread.SetCpuRunning(false);
}
model->SetNextInstruction(next_instr);
QModelIndex model_index = model->IndexFromAbsoluteAddress(next_instr);
disasm_ui.treeView->scrollTo(model_index);
disasm_ui.treeView->selectionModel()->setCurrentIndex(model_index, QItemSelectionModel::SelectCurrent | QItemSelectionModel::Rows);
}
void DisassemblerWidget::OnDebugModeLeft()
{
}
int DisassemblerWidget::SelectedRow()
{
QModelIndex index = disasm_ui.treeView->selectionModel()->currentIndex();
if (!index.isValid())
return -1;
return disasm_ui.treeView->selectionModel()->currentIndex().row();
}