90 lines
2.7 KiB
Rust
90 lines
2.7 KiB
Rust
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use moa_core::{System, Error, Address, Addressable, Debuggable};
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use super::state::M68k;
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use super::decode::M68kDecoder;
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use super::execute::M68kCycleGuard;
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#[derive(Clone, Default)]
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pub struct StackTracer {
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pub calls: Vec<u32>,
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}
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impl StackTracer {
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pub fn push_return(&mut self, addr: u32) {
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self.calls.push(addr);
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}
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pub fn pop_return(&mut self) {
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self.calls.pop();
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}
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}
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#[derive(Clone, Default)]
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pub struct M68kDebugger {
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pub(crate) skip_breakpoint: usize,
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pub(crate) breakpoints: Vec<u32>,
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pub(crate) step_until_return: Option<usize>,
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pub(crate) stack_tracer: StackTracer,
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}
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impl Debuggable for M68k {
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fn add_breakpoint(&mut self, addr: Address) {
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self.debugger.breakpoints.push(addr as u32);
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}
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fn remove_breakpoint(&mut self, addr: Address) {
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if let Some(index) = self.debugger.breakpoints.iter().position(|a| *a == addr as u32) {
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self.debugger.breakpoints.remove(index);
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}
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}
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fn print_current_step(&mut self, _system: &System) -> Result<(), Error> {
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// TODO this is called by the debugger, but should be called some other way
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//let _ = self.decoder.decode_at(&mut self.port, true, self.state.pc);
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//self.decoder.dump_decoded(&mut self.port);
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//self.dump_state();
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Ok(())
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}
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fn print_disassembly(&mut self, addr: Address, count: usize) {
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let mut decoder = M68kDecoder::new(self.cputype, true, 0);
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decoder.dump_disassembly(&mut self.port, addr as u32, count as u32);
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}
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fn run_command(&mut self, system: &System, args: &[&str]) -> Result<bool, Error> {
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match args[0] {
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"ds" | "stack" | "dumpstack" => {
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println!("Stack:");
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for addr in &self.debugger.stack_tracer.calls {
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println!(" {:08x}", self.port.port.read_beu32(system.clock, *addr as Address)?);
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}
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},
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"so" | "stepout" => {
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self.debugger.step_until_return = Some(self.debugger.stack_tracer.calls.len() - 1);
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},
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_ => { return Ok(true); },
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}
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Ok(false)
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}
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}
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impl<'a> M68kCycleGuard<'a> {
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pub fn check_breakpoints(&mut self) -> Result<(), Error> {
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for breakpoint in &self.debugger.breakpoints {
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if *breakpoint == self.state.pc {
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if self.debugger.skip_breakpoint > 0 {
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self.debugger.skip_breakpoint -= 1;
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return Ok(());
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} else {
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self.debugger.skip_breakpoint = 1;
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return Err(Error::breakpoint(format!("breakpoint reached: {:08x}", *breakpoint)));
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}
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}
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}
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Ok(())
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}
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}
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