bsnes-plus/bsnes/snes/debugger/debugger.cpp

#ifdef SYSTEM_CPP

Debugger debugger;

bool Debugger::Breakpoint::operator==(const uint8& data) const {
  if (this->data < 0) return true;
  switch (compare) {
  case Compare::Equal:        return data == this->data;
  case Compare::NotEqual:     return data != this->data;
  case Compare::Less:         return data <  this->data;
  case Compare::LessEqual:    return data <= this->data;
  case Compare::Greater:      return data >  this->data;
  case Compare::GreaterEqual: return data >= this->data;
  }
  return false;
}

bool Debugger::Breakpoint::operator!=(const uint8& data) const {
  return !operator==(data);
}

void Debugger::breakpoint_test(Debugger::Breakpoint::Source source, Debugger::Breakpoint::Mode mode, unsigned addr, uint8 data) {
  for(unsigned i = 0; i < breakpoint.size(); i++) {

    if((breakpoint[i].mode & (unsigned)mode) == 0) continue;
    if(breakpoint[i].source != source) continue;
    if(breakpoint[i] != data) continue;
    
    // account for address mirroring on the S-CPU and SA-1 (and other) buses
    // (with 64kb granularity for ranged breakpoints)
    unsigned addr_start = (breakpoint[i].addr & 0xff0000) | (addr & 0xffff);
    if (addr_start < breakpoint[i].addr) {
      addr_start += 1<<16;
    }
    unsigned addr_end = breakpoint[i].addr;
    if (breakpoint[i].addr_end > breakpoint[i].addr) {
      addr_end = breakpoint[i].addr_end;
    }
    
    for (; addr_start <= addr_end; addr_start += 1<<16) {
      if (source == Debugger::Breakpoint::Source::CPUBus) {
        if (bus.is_mirror(addr_start, addr)) break;
      } else if (source == Debugger::Breakpoint::Source::SA1Bus) {
        if (sa1bus.is_mirror(addr_start, addr)) break;
      } else if (source == Debugger::Breakpoint::Source::SFXBus) {
        if (superfxbus.is_mirror(addr_start, addr)) break;
      } else {
        if (addr_start == addr) break;
      }
    }
    if (addr_start > addr_end) continue;
    
    breakpoint[i].counter++;
    breakpoint_hit = i;
    break_event = BreakEvent::BreakpointHit;
    scheduler.exit(Scheduler::ExitReason::DebuggerEvent);
    break;
  }
}

uint8 Debugger::read(Debugger::MemorySource source, unsigned addr) {
  switch(source) {
    case MemorySource::CPUBus: {
      return bus.read(addr & 0xffffff);
    } break;

    case MemorySource::APUBus: {
      return smp.op_debugread(addr & 0xffff);
    } break;

    case MemorySource::APURAM: {
      return memory::apuram.read(addr & 0xffff);
    } break;
    
    case MemorySource::DSP: {
      return dsp.read(addr & 0x7f);
    } break;

    case MemorySource::VRAM: {
      return memory::vram.read(addr & 0x3ffff);
    } break;

    case MemorySource::OAM: {
      if(addr & 0x0200) return memory::oam.read(0x0200 + (addr & 0x1f));
      return memory::oam.read(addr & 0x01ff);
    } break;

    case MemorySource::CGRAM: {
      return memory::cgram.read(addr & 0x01ff);
    } break;
    
    case MemorySource::CartROM: {
      if (addr < memory::cartrom.size())
        return memory::cartrom.read(addr & 0xffffff);
    } break;
    
    case MemorySource::CartRAM: {
      if (addr < memory::cartram.size())
        return memory::cartram.read(addr & 0xffffff);
    } break;
    
    case MemorySource::SA1Bus: {
      if (cartridge.has_sa1())
        return sa1bus.read(addr & 0xffffff);
    } break;
    
    case MemorySource::SFXBus: {
      if (cartridge.has_superfx())
        return superfxbus.read(addr & 0xffffff);
    } break;
    
    case MemorySource::SGBBus: {
      if (cartridge.mode() == Cartridge::Mode::SuperGameBoy)
        return supergameboy.read_gb(addr & 0xffff);
    } break;
    
    case MemorySource::SGBROM: {
      if (addr < memory::gbrom.size())
        return memory::gbrom.read(addr & 0xffffff);
    } break;
    
    case MemorySource::SGBRAM: {
      if (addr < memory::gbram.size())
        return memory::gbram.read(addr & 0xffffff);
    } break;
  }

  return 0x00;
}

void Debugger::write(Debugger::MemorySource source, unsigned addr, uint8 data) {
  switch(source) {
    case MemorySource::CPUBus: {
      bus.write(addr & 0xffffff, data);
    } break;
    
    case MemorySource::APUBus:
    case MemorySource::APURAM: {
      memory::apuram.write(addr & 0xffff, data);
    } break;

    case MemorySource::DSP: {
      dsp.write(addr & 0x7f, data);
    } break;

    case MemorySource::VRAM: {
      memory::vram.write(addr & 0x3ffff, data);
    } break;

    case MemorySource::OAM: {
      if(addr & 0x0200) memory::oam.write(0x0200 + (addr & 0x1f), data);
      else memory::oam.write(addr & 0x01ff, data);
    } break;

    case MemorySource::CGRAM: {
      memory::cgram.write(addr & 0x01ff, data);
    } break;
    
    case MemorySource::CartROM: {
      if (addr < memory::cartrom.size()) {
        memory::cartrom.write(addr & 0xffffff, data);
      }
    } break;
    
    case MemorySource::CartRAM: {
      if (addr < memory::cartram.size())
        memory::cartram.write(addr & 0xffffff, data);
    } break;
    
    case MemorySource::SA1Bus: {
      if (cartridge.has_sa1()) sa1bus.write(addr & 0xffffff, data);
    } break;
    
    case MemorySource::SFXBus: {
      if (cartridge.has_superfx()) superfxbus.write(addr & 0xffffff, data);
    } break;
    
    case MemorySource::SGBBus: {
      if (cartridge.mode() == Cartridge::Mode::SuperGameBoy)
        supergameboy.write_gb(addr & 0xffff, data);
    } break;
    
    case MemorySource::SGBROM: {
      if (addr < memory::gbrom.size())
        memory::gbrom.write(addr & 0xffffff, data);
    } break;
    
    case MemorySource::SGBRAM: {
      if (addr < memory::gbram.size())
        memory::gbram.write(addr & 0xffffff, data);
    } break;
  }
}

Debugger::Debugger() {
  break_event = BreakEvent::None;

  breakpoint_hit = 0;

  step_cpu = false;
  step_smp = false;
  step_sa1 = false;
  step_sfx = false;
  bus_access = false;
  break_on_wdm = false;
  break_on_brk = false;
  log_without_break = false;

  step_type = StepType::None;
}

#endif