Add debug adapter for MAME colecovision gdbserver

Author: lwerdna

mame_coleco.py

@@ -0,0 +1,97 @@
+#!/usr/bin/env python3
+
+# packets supported by MAME stub
+# https://github.com/mamedev/mame/blob/master/src/osd/modules/debugger/debuggdbstub.cpp
+# ! - 
+# ? get last stop reason
+# c continue
+# D detach
+# g read general registers
+# G write general registers
+# H set thread for step,continue,others
+# i do one clock cycle
+# I signal, then cycle step
+# k kill process
+# m read mem
+# M write mem
+# p read reg
+# P write reg
+# q general query
+# s single step
+# z remove breakpoint
+# Z add breakpoint
+#
+
+import os
+import re
+import shutil
+import socket
+import subprocess
+from struct import pack, unpack
+
+from . import rsp
+from . import utils
+from . import gdblike
+from . import DebugAdapter
+
+class DebugAdapterMameColeco(gdblike.DebugAdapterGdbLike):
+	def __init__(self, **kwargs):
+		gdblike.DebugAdapterGdbLike.__init__(self, **kwargs)
+
+		self.rsp = None
+
+		self.module_cache = {}
+
+	#--------------------------------------------------------------------------
+	# API
+	#--------------------------------------------------------------------------
+
+	def exec(self, path, args=[]):
+		raise NotImplementedError('no execute, connect to listening MAME process')
+
+	def connect_continued(self, sock,connection):
+		self.sock = sock
+		self.rspConn = connection
+
+		self.reg_info_load()
+
+		# no pid, not tid
+		self.tid = 0
+		self.target_pid_ = 0
+
+	def mem_modules(self, cache_ok=True):
+		raise NotImplementedError('no module list on ColecoVision')
+
+	def go(self):
+		self.reg_cache = {}
+		(reason, reason_data) = self.go_generic('c')
+		self.handle_stop(reason, reason_data)
+		return (reason, reason_data)
+
+	def step_into(self):
+		self.reg_cache = {}
+		(reason, reason_data) = self.go_generic('s')
+		self.handle_stop(reason, reason_data)
+		return (reason, reason_data)
+
+	# thread stuff
+	def thread_list(self):
+		return [0]
+
+	def thread_selected(self):
+		return 0
+
+	def thread_select(self, tid):
+		if tid != 0:
+			raise DebugAdapter.GeneralError('mame_coleco has only one implicit thread: 0')
+
+	#
+	def thread_stop_pkt_to_reason(self, pkt_data):
+		''' callback: given the stop packet data in the form of a "TDICT", return
+			a (reason, extra_data) tuple '''
+		# pkt_data eg: {'signal': 5, 'r10': 29625, 'r11': 3}
+		if pkt_data.get('signal', -1) == 5:
+			return (DebugAdapter.STOP_REASON.SINGLE_STEP, None)
+		else:
+			return (DebugAdapter.STOP_REASON.UNKNOWN, None)
+