Gdb fixes

Former-commit-id: 2940580fc6b3760d77b5598b0faf72a773183304
Former-commit-id: cf3f361178c75d4e39832774bdd052ef8aab6be8

arm7tdmi/src/cpu.rs

@@ -1,11 +1,18 @@
+use std::fmt;
+
 use log::debug;
 use serde::{Deserialize, Serialize};
+use bit::BitIndex;
+use num::FromPrimitive;
+use ansi_term::{Colour, Style};
+
+use rustboyadvance_utils::{Shared, WeakPointer};
 
 pub use super::exception::Exception;
+use super::reg_string;
 
 use super::{arm::ArmCond, psr::RegPSR, Addr, CpuMode, CpuState};
 
-use rustboyadvance_utils::{Shared, WeakPointer};
 
 use super::memory::{MemoryAccess, MemoryInterface};
 use MemoryAccess::*;
@@ -37,18 +44,12 @@ cfg_if! {
         use super::DecodedInstruction;
         use super::arm::ArmInstruction;
         use super::thumb::ThumbInstruction;
-        use super::reg_string;
-        use std::fmt;
 
-        use ansi_term::{Colour, Style};
     } else {
 
     }
 }
 
-use bit::BitIndex;
-use num::FromPrimitive;
-
 pub enum CpuAction {
     AdvancePC(MemoryAccess),
     PipelineFlushed,
@@ -104,7 +105,7 @@ impl Default for DebuggerState {
     }
 }
 
-#[derive(Clone, Debug)]
+#[derive(Clone)]
 pub struct Arm7tdmiCore<I: MemoryInterface> {
     pub pc: u32,
     pub bus: Shared<I>,
@@ -506,6 +507,29 @@ impl<I: MemoryInterface> Arm7tdmiCore<I> {
     }
 }
 
+impl<I: MemoryInterface> fmt::Debug for Arm7tdmiCore<I> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        writeln!(f, "ARM7TDMI Core Status:")?;
+        writeln!(f, "\tCPSR: {}", self.cpsr)?;
+        writeln!(f, "\tGeneral Purpose Registers:")?;
+        let reg_normal_style = Style::new().bold();
+        let gpr = self.copy_registers();
+        for i in 0..15 {
+            let mut reg_name = reg_string(i).to_string();
+            reg_name.make_ascii_uppercase();
+            let entry = format!("\t{:-3} = 0x{:08x}", reg_name, gpr[i]);
+               write!(
+                f,
+                "{}{}",
+                reg_normal_style.paint(entry),
+                if (i + 1) % 4 == 0 { "\n" } else { "" }
+            )?;
+        }
+        let pc = format!("\tPC  = 0x{:08x}", self.get_next_pc());
+        writeln!(f, "{}", reg_normal_style.paint(pc))
+    }
+}
+
 #[cfg(feature = "debugger")]
 impl<I: MemoryInterface> fmt::Display for Core<I> {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {

arm7tdmi/src/gdb/target.rs

@@ -41,7 +41,7 @@ impl<I: MemoryGdbInterface> SingleThreadBase for Arm7tdmiCore<I> {
         &mut self,
         regs: &mut gdbstub_arch::arm::reg::ArmCoreRegs,
     ) -> TargetResult<(), Self> {
-        regs.pc = self.get_next_pc();
+        regs.pc = self.pc;
         regs.lr = self.get_reg(REG_LR);
         regs.sp = self.get_reg(REG_SP);
         regs.r[..].copy_from_slice(&self.gpr[..13]);
@@ -56,7 +56,7 @@ impl<I: MemoryGdbInterface> SingleThreadBase for Arm7tdmiCore<I> {
         self.set_reg(REG_PC, regs.pc);
         self.set_reg(REG_LR, regs.lr);
         self.set_reg(REG_SP, regs.sp);
-        self.gpr.copy_from_slice(&regs.r);
+        self.gpr[..13].copy_from_slice(&regs.r);
         self.cpsr.set(regs.cpsr);
         Ok(())
     }

core/src/gba.rs

@@ -6,7 +6,7 @@ use arm7tdmi::gdbstub::stub::SingleThreadStopReason;
 use bincode;
 use serde::{Deserialize, Serialize};
 
-use crate::gdb_support::{gdb_thread::start_gdb_server_thread, DebuggerState};
+use crate::gdb_support::{gdb_thread::start_gdb_server_thread, DebuggerRequestHandler};
 
 use super::cartridge::Cartridge;
 use super::dma::DmaController;
@@ -24,13 +24,13 @@ use arm7tdmi::{self, Arm7tdmiCore};
 use rustboyadvance_utils::Shared;
 
 pub struct GameBoyAdvance {
-    pub(crate) cpu: Box<Arm7tdmiCore<SysBus>>,
+    pub cpu: Box<Arm7tdmiCore<SysBus>>,
     pub(crate) sysbus: Shared<SysBus>,
     pub(crate) io_devs: Shared<IoDevices>,
     pub(crate) scheduler: SharedScheduler,
     interrupt_flags: SharedInterruptFlags,
     audio_interface: DynAudioInterface,
-    pub(crate) debugger: Option<DebuggerState>,
+    pub(crate) debugger: Option<DebuggerRequestHandler>,
 }
 
 #[derive(Serialize, Deserialize)]
@@ -251,17 +251,12 @@ impl GameBoyAdvance {
 
     /// Recv & handle messages from the debugger, and return if we are stopped or not
     pub fn debugger_run(&mut self) {
-        let mut should_stop = false;
+        let mut should_interrupt_frame = false;
         let debugger = self.debugger.take().expect("debugger should be None here");
-        let debugger = debugger
+        self.debugger = debugger.handle_incoming_requests(self, &mut should_interrupt_frame);
-            .handle_message(self, &mut should_stop)
-            .map_err(|_| "Failed to handle message")
-            .unwrap();
-
-        self.debugger = debugger;
 
         if let Some(debugger) = &mut self.debugger {
-            if should_stop {
+            if should_interrupt_frame {
                 debugger.notify_stop_reason(SingleThreadStopReason::DoneStep);
             } else {
                 self.frame_interruptible();
@@ -277,7 +272,7 @@ impl GameBoyAdvance {
     }
 
     #[inline]
-    pub fn cpu_step(&mut self) {
+    pub(crate) fn cpu_step(&mut self) {
         if self.io_devs.intc.irq_pending() {
             self.cpu.irq();
             self.io_devs.haltcnt = HaltState::Running;

core/src/gdb_support.rs

@@ -1,9 +1,9 @@
-use std::result;
 use std::sync::{Arc, Condvar, Mutex};
 use std::thread::JoinHandle;
 
 type SendSync<T> = Arc<Mutex<T>>;
 
+use arm7tdmi::gdbstub::common::Signal;
 use arm7tdmi::gdbstub::stub::{DisconnectReason, SingleThreadStopReason};
 use arm7tdmi::gdbstub::target::TargetError;
 use arm7tdmi::gdbstub::target::{ext::base::singlethread::SingleThreadBase, Target};
@@ -20,7 +20,7 @@ mod target;
 use crate::GameBoyAdvance;
 
 #[derive(Debug)]
-pub(crate) enum DebuggerMessage {
+pub(crate) enum DebuggerRequest {
     ReadRegs(SendSync<ArmCoreRegs>),
     WriteRegs(ArmCoreRegs),
     ReadAddrs(Addr, SendSync<Box<[u8]>>),
@@ -28,15 +28,15 @@ pub(crate) enum DebuggerMessage {
     WriteAddrs(Addr, Box<[u8]>),
     AddSwBreakpoint(Addr),
     DelSwBreakpoint(Addr),
-    Stop,
+    Interrupt,
     Resume,
     SingleStep,
     Disconnected(DisconnectReason),
 }
 
 pub struct DebuggerTarget {
-    tx: Sender<DebuggerMessage>,
+    tx: Sender<DebuggerRequest>,
-    operation_signal: Arc<(Mutex<bool>, Condvar)>,
+    request_complete_signal: Arc<(Mutex<bool>, Condvar)>,
     stop_signal: Arc<(Mutex<SingleThreadStopReason<u32>>, Condvar)>,
     memory_map: String,
 }
@@ -44,7 +44,7 @@ pub struct DebuggerTarget {
 impl DebuggerTarget {
     #[inline]
     pub fn wait_for_operation(&mut self) {
-        let (lock, cvar) = &*self.operation_signal;
+        let (lock, cvar) = &*self.request_complete_signal;
         let mut finished = lock.lock().unwrap();
         while !*finished {
             finished = cvar.wait(finished).unwrap();
@@ -53,39 +53,39 @@ impl DebuggerTarget {
     }
 }
 
-pub(crate) struct DebuggerState {
+pub(crate) struct DebuggerRequestHandler {
-    rx: Receiver<DebuggerMessage>,
+    rx: Receiver<DebuggerRequest>,
-    operation_signal: Arc<(Mutex<bool>, Condvar)>,
+    request_complete_signal: Arc<(Mutex<bool>, Condvar)>,
     stop_signal: Arc<(Mutex<SingleThreadStopReason<u32>>, Condvar)>,
     thread: JoinHandle<()>,
     stopped: bool,
 }
 
-impl DebuggerState {
+enum DebuggerStatus {
-    pub fn handle_message(
+    RequestComplete,
-        mut self,
+    ResumeRequested,
+    StopRequested,
+    Disconnected(DisconnectReason),
+}
+
+impl DebuggerRequestHandler {
+    fn handle_request(
+        &mut self,
         gba: &mut GameBoyAdvance,
-        should_stop: &mut bool,
+        req: &mut DebuggerRequest,
-    ) -> Result<Option<DebuggerState>, TargetError<<DebuggerTarget as Target>::Error>> {
+    ) -> Result<DebuggerStatus, TargetError<<DebuggerTarget as Target>::Error>> {
-        if self.thread.is_finished() {
+        use DebuggerRequest::*;
-            warn!("gdb server thread unexpectdly died");
+        match req {
-            *should_stop = true;
-            self.thread.join().unwrap();
-            return Ok(None);
-        }
-        if let Ok(msg) = self.rx.try_recv() {
-            use DebuggerMessage::*;
-            let mut result = match msg {
             ReadRegs(regs) => {
                 let mut regs = regs.lock().unwrap();
                 gba.cpu.read_registers(&mut regs)?;
                 debug!("Debugger requested to read regs: {:?}", regs);
-                    Ok(Some(self))
+                Ok(DebuggerStatus::RequestComplete)
             }
             WriteRegs(regs) => {
                 debug!("Debugger requested to write regs: {:?}", regs);
-                    gba.cpu.write_registers(&regs)?;
+                gba.cpu.write_registers(regs)?;
-                    Ok(Some(self))
+                Ok(DebuggerStatus::RequestComplete)
             }
             ReadAddrs(addr, data) => {
                 let mut data = data.lock().unwrap();
@@ -94,8 +94,8 @@ impl DebuggerState {
                     data.len(),
                     addr
                 );
-                    gba.cpu.read_addrs(addr, &mut data)?;
+                gba.cpu.read_addrs(*addr, &mut data)?;
-                    Ok(Some(self))
+                Ok(DebuggerStatus::RequestComplete)
             }
             WriteAddrs(addr, data) => {
                 debug!(
@@ -103,55 +103,89 @@ impl DebuggerState {
                     data.len(),
                     addr
                 );
-                    gba.cpu.write_addrs(addr, &data)?;
+                gba.cpu.write_addrs(*addr, &data)?;
-                    Ok(Some(self))
+                Ok(DebuggerStatus::RequestComplete)
             }
-                Stop => {
+            Interrupt => {
                 debug!("Debugger requested stopped");
-                    self.stopped = true;
+                self.notify_stop_reason(SingleThreadStopReason::Signal(Signal::SIGINT));
-                    Ok(Some(self))
+                Ok(DebuggerStatus::StopRequested)
             }
             Resume => {
                 debug!("Debugger requested resume");
                 self.stopped = false;
-                    Ok(Some(self))
+                Ok(DebuggerStatus::ResumeRequested)
             }
             SingleStep => {
                 debug!("Debugger requested single step");
-                    gba.run::<true>(1);
+                gba.cpu_step();
-                    self.notify_stop_reason(SingleThreadStopReason::DoneStep);
+                let stop_reason = SingleThreadStopReason::DoneStep;
-                    self.stopped = true;
+                self.notify_stop_reason(stop_reason);
-                    Ok(Some(self))
+                Ok(DebuggerStatus::StopRequested)
             }
             AddSwBreakpoint(addr) => {
-                    gba.cpu.add_breakpoint(addr);
+                gba.cpu.add_breakpoint(*addr);
-                    Ok(Some(self))
+                Ok(DebuggerStatus::RequestComplete)
             }
             DelSwBreakpoint(addr) => {
-                    gba.cpu.del_breakpoint(addr);
+                gba.cpu.del_breakpoint(*addr);
-                    Ok(Some(self))
+                Ok(DebuggerStatus::RequestComplete)
             }
-                Disconnected(reason) => {
+            Disconnected(reason) => Ok(DebuggerStatus::Disconnected(*reason)),
+        }
+    }
+
+    fn terminate(mut self, should_interrupt_frame: &mut bool) -> Option<DebuggerRequestHandler> {
+        self.notify_stop_reason(SingleThreadStopReason::Exited(1));
+        self.thread.join().unwrap();
+        self.stopped = true;
+        *should_interrupt_frame = true;
+        None
+    }
+
+    pub fn handle_incoming_requests(
+        mut self,
+        gba: &mut GameBoyAdvance,
+        should_interrupt_frame: &mut bool,
+    ) -> Option<DebuggerRequestHandler> {
+        if self.thread.is_finished() {
+            warn!("gdb server thread unexpectdly died");
+            return self.terminate(should_interrupt_frame);
+        }
+        while let Ok(mut req) = self.rx.try_recv() {
+            match self.handle_request(gba, &mut req) {
+                Ok(DebuggerStatus::RequestComplete) => {
+                    self.notify_request_complete();
+                }
+                Ok(DebuggerStatus::StopRequested) => {
+                    self.stopped = true;
+                    self.notify_request_complete();
+                }
+                Ok(DebuggerStatus::ResumeRequested) => {
+                    self.stopped = false;
+                    self.notify_request_complete();
+                }
+                Ok(DebuggerStatus::Disconnected(reason)) => {
                     debug!("Debugger disconnected due to {:?}", reason);
                     debug!("closing gdbserver thread");
-                    self.thread.join().unwrap();
+                    return self.terminate(should_interrupt_frame);
-                    Ok(None)
                 }
-            };
+
-            if let Ok(Some(result)) = &mut result {
+                Err(_) => {
-                let (lock, cvar) = &*result.operation_signal;
+                    error!("An error occured while handling debug request {:?}", req);
+                    return self.terminate(should_interrupt_frame);
+                }
+            }
+        }
+        *should_interrupt_frame = self.stopped;
+        Some(self)
+    }
+
+    fn notify_request_complete(&mut self) {
+        let (lock, cvar) = &*self.request_complete_signal;
         let mut finished = lock.lock().unwrap();
         *finished = true;
         cvar.notify_one();
-                *should_stop = result.stopped;
-            } else {
-                *should_stop = true;
-            }
-            result
-        } else {
-            *should_stop = self.stopped;
-            Ok(Some(self))
-        }
     }
 
     pub fn notify_stop_reason(&mut self, reason: SingleThreadStopReason<u32>) {

core/src/gdb_support/event_loop.rs

@@ -6,7 +6,7 @@ use arm7tdmi::gdb::gdbstub::{
     target::Target,
 };
 
-use super::{DebuggerMessage, DebuggerTarget};
+use super::{DebuggerRequest, DebuggerTarget};
 
 pub struct DebuggerEventLoop {}
 
@@ -54,7 +54,7 @@ impl run_blocking::BlockingEventLoop for DebuggerEventLoop {
         target: &mut DebuggerTarget,
     ) -> Result<Option<SingleThreadStopReason<u32>>, <DebuggerTarget as Target>::Error> {
         info!("on_interrupt: sending stop message");
-        target.tx.send(DebuggerMessage::Stop).unwrap();
+        target.tx.send(DebuggerRequest::Interrupt).unwrap();
         target.wait_for_operation();
         info!("Waiting for target to stop <blocking>");
         let (lock, cvar) = &*target.stop_signal;

core/src/gdb_support/gdb_thread.rs

@@ -11,21 +11,23 @@ use arm7tdmi::{
 
 use crate::{GBAError, GameBoyAdvance};
 
-use super::{event_loop::DebuggerEventLoop, DebuggerMessage, DebuggerState, DebuggerTarget};
+use super::{
+    event_loop::DebuggerEventLoop, DebuggerRequest, DebuggerRequestHandler, DebuggerTarget,
+};
 
 /// Starts a gdbserver thread
 pub(crate) fn start_gdb_server_thread(
     gba: &mut GameBoyAdvance,
     port: u16,
-) -> Result<DebuggerState, GBAError> {
+) -> Result<DebuggerRequestHandler, GBAError> {
     let (tx, rx) = crossbeam::channel::unbounded();
-    let operation_signal = Arc::new((Mutex::new(false), Condvar::new()));
+    let request_complete_signal = Arc::new((Mutex::new(false), Condvar::new()));
     let stop_signal = Arc::new((
         Mutex::new(SingleThreadStopReason::Signal(Signal::SIGINT)),
         Condvar::new(),
     ));
     let stop_signal_2 = stop_signal.clone();
-    let operation_signal_2 = operation_signal.clone();
+    let request_complete_signal_2 = request_complete_signal.clone();
     let memory_map = gba.sysbus.generate_memory_map_xml().unwrap();
 
     let conn = wait_for_connection(port)?;
@@ -35,7 +37,7 @@ pub(crate) fn start_gdb_server_thread(
 
         let mut target = DebuggerTarget {
             tx,
-            operation_signal: operation_signal_2,
+            request_complete_signal: request_complete_signal_2,
             stop_signal: stop_signal_2,
             memory_map,
         };
@@ -46,13 +48,13 @@ pub(crate) fn start_gdb_server_thread(
             .unwrap();
         target
             .tx
-            .send(DebuggerMessage::Disconnected(disconnect_reason))
+            .send(DebuggerRequest::Disconnected(disconnect_reason))
             .unwrap();
     });
 
-    let mut debugger = DebuggerState {
+    let mut debugger = DebuggerRequestHandler {
         rx,
-        operation_signal,
+        request_complete_signal,
         stop_signal,
         thread,
         stopped: true,

core/src/gdb_support/target.rs

@@ -12,7 +12,7 @@ use gdbstub::target::ext::breakpoints::BreakpointsOps;
 use gdbstub::target::{self, Target, TargetError, TargetResult};
 use gdbstub_arch::arm::reg::ArmCoreRegs;
 
-use super::{DebuggerMessage, DebuggerTarget};
+use super::{DebuggerRequest, DebuggerTarget};
 
 impl Target for DebuggerTarget {
     type Error = ();
@@ -38,7 +38,7 @@ impl SingleThreadBase for DebuggerTarget {
     fn read_registers(&mut self, regs: &mut ArmCoreRegs) -> TargetResult<(), Self> {
         let regs_copy = Arc::new(Mutex::new(ArmCoreRegs::default()));
         self.tx
-            .send(DebuggerMessage::ReadRegs(regs_copy.clone()))
+            .send(DebuggerRequest::ReadRegs(regs_copy.clone()))
             .unwrap();
         self.wait_for_operation();
         regs_copy.lock().unwrap().clone_into(regs);
@@ -47,7 +47,7 @@ impl SingleThreadBase for DebuggerTarget {
 
     fn write_registers(&mut self, regs: &ArmCoreRegs) -> TargetResult<(), Self> {
         self.tx
-            .send(DebuggerMessage::WriteRegs(regs.clone()))
+            .send(DebuggerRequest::WriteRegs(regs.clone()))
             .unwrap();
         self.wait_for_operation();
         Ok(())
@@ -56,7 +56,7 @@ impl SingleThreadBase for DebuggerTarget {
     fn read_addrs(&mut self, start_addr: u32, data: &mut [u8]) -> TargetResult<(), Self> {
         let buffer = Arc::new(Mutex::new(vec![0; data.len()].into_boxed_slice()));
         self.tx
-            .send(DebuggerMessage::ReadAddrs(start_addr, buffer.clone()))
+            .send(DebuggerRequest::ReadAddrs(start_addr, buffer.clone()))
             .unwrap();
         self.wait_for_operation();
         data.copy_from_slice(&buffer.lock().unwrap());
@@ -78,7 +78,7 @@ impl SingleThreadBase for DebuggerTarget {
 
 impl SingleThreadResume for DebuggerTarget {
     fn resume(&mut self, _signal: Option<Signal>) -> Result<(), Self::Error> {
-        self.tx.send(DebuggerMessage::Resume).unwrap();
+        self.tx.send(DebuggerRequest::Resume).unwrap();
         self.wait_for_operation();
         Ok(())
     }
@@ -94,9 +94,7 @@ impl SingleThreadResume for DebuggerTarget {
 
 impl SingleThreadSingleStep for DebuggerTarget {
     fn step(&mut self, _signal: Option<Signal>) -> Result<(), Self::Error> {
-        self.tx.send(DebuggerMessage::SingleStep).unwrap();
+        self.tx.send(DebuggerRequest::SingleStep).unwrap();
-        self.wait_for_operation();
-        self.tx.send(DebuggerMessage::Stop).unwrap();
         self.wait_for_operation();
         Ok(())
     }
@@ -135,7 +133,7 @@ impl target::ext::breakpoints::SwBreakpoint for DebuggerTarget {
         _kind: gdbstub_arch::arm::ArmBreakpointKind,
     ) -> TargetResult<bool, Self> {
         self.tx
-            .send(DebuggerMessage::AddSwBreakpoint(addr))
+            .send(DebuggerRequest::AddSwBreakpoint(addr))
             .unwrap();
         self.wait_for_operation();
         Ok(true)
@@ -147,7 +145,7 @@ impl target::ext::breakpoints::SwBreakpoint for DebuggerTarget {
         _kind: gdbstub_arch::arm::ArmBreakpointKind,
     ) -> TargetResult<bool, Self> {
         self.tx
-            .send(DebuggerMessage::DelSwBreakpoint(addr))
+            .send(DebuggerRequest::DelSwBreakpoint(addr))
             .unwrap();
         self.wait_for_operation();
         Ok(true)

platform/rustboyadvance-sdl2/src/main.rs

@@ -95,12 +95,26 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
         audio_interface,
     ));
 
+    // let gba_raw_ptr = Box::into_raw(gba) as usize;
+    // static mut gba_raw: usize = 0;
+    // unsafe { gba_raw = gba_raw_ptr };
+    // let mut gba = unsafe {Box::from_raw(gba_raw_ptr as *mut GameBoyAdvance) };
+
+    // std::panic::set_hook(Box::new(|panic_info| {
+    //     let gba = unsafe {Box::from_raw(gba_raw as *mut GameBoyAdvance) };
+    //     println!("System crashed Oh No!!! {:?}", gba.cpu);
+    //     let normal_panic = std::panic::take_hook();
+    //     normal_panic(panic_info);
+    // }));
+
+
     if opts.skip_bios {
+        println!("Skipping bios animation..");
         gba.skip_bios();
     }
 
     if opts.gdbserver {
-        todo!("gdb")
+        gba.start_gdbserver(DEFAULT_GDB_SERVER_PORT);
     }
 
     let mut vsync = true;
@@ -146,7 +160,10 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
                         if opts.savestate_path().is_file() {
                             let save = read_bin_file(&opts.savestate_path())?;
                             info!("Restoring state from {:?}...", opts.savestate_path());
-                            gba.restore_state(&save)?;
+                            let (audio_interface, _sdl_audio_device_new) = audio::create_audio_player(&sdl_context)?;
+                            _sdl_audio_device = _sdl_audio_device_new;
+                            let rom = opts.read_rom()?.into_boxed_slice();
+                            gba = Box::new(GameBoyAdvance::from_saved_state(&save, bios_bin.clone(), rom, audio_interface)?);
                             info!("Restored!");
                         } else {
                             info!("Savestate not created, please create one by pressing F5");

platform/rustboyadvance-sdl2/src/options.rs

@@ -1,9 +1,10 @@
-use std::path::PathBuf;
+use std::{path::PathBuf, io};
 
 use rustboyadvance_core::{
     cartridge::{BackupType, GamepakBuilder},
     prelude::Cartridge,
 };
+use rustboyadvance_utils::read_bin_file;
 use structopt::StructOpt;
 
 const SAVE_TYPE_POSSIBLE_VALUES: &[&str] =
@@ -61,4 +62,8 @@ impl Options {
     pub fn rom_name(&self) -> &str {
         self.rom.file_name().unwrap().to_str().unwrap()
     }
+
+    pub fn read_rom(&self) -> Result<Vec<u8>, std::io::Error> {
+        read_bin_file(&self.rom)
+    }
 }