1/* 2 * Copyright 2015 LabWare 3 * Copyright 2014 Google, Inc. 4 * Copyright (c) 2002-2005 The Regents of The University of Michigan 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions are --- 35 unchanged lines hidden (view full) --- 44#include "base/intmath.hh" 45#include "base/pollevent.hh" 46#include "base/socket.hh" 47#include "cpu/pc_event.hh" 48 49class System; 50class ThreadContext; 51 |
52class BaseRemoteGDB; |
53class HardBreakpoint; |
54 |
55/** 56 * Concrete subclasses of this abstract class represent how the 57 * register values are transmitted on the wire. Usually each 58 * architecture should define one subclass, but there can be more 59 * if there is more than one possible wire format. For example, 60 * ARM defines both AArch32GdbRegCache and AArch64GdbRegCache. 61 */ 62class BaseGdbRegCache |
63{ 64 public: |
65 |
66 /** 67 * Return the pointer to the raw bytes buffer containing the 68 * register values. Each byte of this buffer is literally 69 * encoded as two hex digits in the g or G RSP packet. 70 */ 71 virtual char *data() const = 0; |
72 |
73 /** 74 * Return the size of the raw buffer, in bytes 75 * (i.e., half of the number of digits in the g/G packet). 76 */ 77 virtual size_t size() const = 0; |
78 |
79 /** 80 * Fill the raw buffer from the registers in the ThreadContext. 81 */ 82 virtual void getRegs(ThreadContext*) = 0; 83 84 /** 85 * Set the ThreadContext's registers from the values 86 * in the raw buffer. 87 */ 88 virtual void setRegs(ThreadContext*) const = 0; 89 90 /** 91 * Return the name to use in places like DPRINTF. 92 * Having each concrete superclass redefine this member 93 * is useful in situations where the class of the regCache 94 * can change on the fly. 95 */ 96 virtual const std::string name() const = 0; 97 98 BaseGdbRegCache(BaseRemoteGDB *g) : gdb(g) |
99 {} |
100 virtual ~BaseGdbRegCache() 101 {} 102 103 protected: 104 BaseRemoteGDB *gdb; |
105}; 106 107class BaseRemoteGDB 108{ |
109 friend class HardBreakpoint; 110 public: |
111 |
112 /* 113 * Interface to other parts of the simulator. 114 */ 115 BaseRemoteGDB(System *system, ThreadContext *context, int _port); 116 virtual ~BaseRemoteGDB(); |
117 |
118 std::string name(); |
119 |
120 void listen(); 121 void connect(); |
122 |
123 int port() const; |
124 |
125 void attach(int fd); 126 void detach(); 127 bool isAttached() { return attached; } |
128 |
129 void replaceThreadContext(ThreadContext *_tc) { tc = _tc; } |
130 |
131 bool trap(int type); 132 bool breakpoint() { return trap(SIGTRAP); } |
133 |
134 private: 135 /* 136 * Connection to the external GDB. 137 */ 138 void incomingData(int revent); 139 void connectWrapper(int revent) { connect(); } 140 141 template <void (BaseRemoteGDB::*F)(int revent)> 142 class SocketEvent : public PollEvent |
143 { 144 protected: |
145 BaseRemoteGDB *gdb; 146 147 public: |
148 SocketEvent(BaseRemoteGDB *gdb, int fd, int e) : 149 PollEvent(fd, e), gdb(gdb) |
150 {} 151 |
152 void process(int revent) { (gdb->*F)(revent); } |
153 }; 154 |
155 typedef SocketEvent<&BaseRemoteGDB::connectWrapper> ConnectEvent; 156 typedef SocketEvent<&BaseRemoteGDB::incomingData> DataEvent; |
157 |
158 friend ConnectEvent; 159 friend DataEvent; |
160 |
161 ConnectEvent *connectEvent; 162 DataEvent *dataEvent; |
163 |
164 ListenSocket listener; 165 int _port; |
166 |
167 // The socket commands come in through. 168 int fd; |
169 |
170 // Transfer data to/from GDB. 171 uint8_t getbyte(); 172 void putbyte(uint8_t b); |
173 |
174 int recv(char *data, int len); 175 void send(const char *data); |
176 |
177 /* 178 * Simulator side debugger state. 179 */ 180 bool active; 181 bool attached; |
182 |
183 System *sys; 184 ThreadContext *tc; |
185 |
186 BaseGdbRegCache *regCachePtr; |
187 |
188 class TrapEvent : public Event 189 { |
190 protected: |
191 int _type; |
192 BaseRemoteGDB *gdb; |
193 |
194 public: 195 TrapEvent(BaseRemoteGDB *g) : gdb(g) 196 {} |
197 |
198 void type(int t) { _type = t; } 199 void process() { gdb->trap(_type); } 200 } trapEvent; |
201 |
202 /* 203 * The interface to the simulated system. 204 */ 205 // Machine memory. 206 bool read(Addr addr, size_t size, char *data); 207 bool write(Addr addr, size_t size, const char *data); |
208 |
209 template <class T> T read(Addr addr); 210 template <class T> void write(Addr addr, T data); 211 |
212 // Single step. 213 void singleStep(); 214 EventWrapper<BaseRemoteGDB, &BaseRemoteGDB::singleStep> singleStepEvent; |
215 |
216 void clearSingleStep(); 217 void setSingleStep(); 218 |
219 /// Schedule an event which will be triggered "delta" instructions later. 220 void scheduleInstCommitEvent(Event *ev, int delta); 221 /// Deschedule an instruction count based event. 222 void descheduleInstCommitEvent(Event *ev); 223 |
224 // Breakpoints. 225 void insertSoftBreak(Addr addr, size_t len); 226 void removeSoftBreak(Addr addr, size_t len); 227 void insertHardBreak(Addr addr, size_t len); 228 void removeHardBreak(Addr addr, size_t len); |
229 |
230 void clearTempBreakpoint(Addr &bkpt); 231 void setTempBreakpoint(Addr bkpt); |
232 |
233 /* 234 * GDB commands. 235 */ 236 struct GdbCommand 237 { |
238 public: |
239 struct Context 240 { 241 const GdbCommand *cmd; 242 char cmd_byte; 243 int type; 244 char *data; 245 int len; 246 }; |
247 |
248 typedef bool (BaseRemoteGDB::*Func)(Context &ctx); |
249 |
250 const char * const name; 251 const Func func; 252 253 GdbCommand(const char *_name, Func _func) : name(_name), func(_func) {} |
254 }; |
255 |
256 static std::map<char, GdbCommand> command_map; |
257 |
258 bool cmd_unsupported(GdbCommand::Context &ctx); |
259 |
260 bool cmd_signal(GdbCommand::Context &ctx); 261 bool cmd_cont(GdbCommand::Context &ctx); 262 bool cmd_async_cont(GdbCommand::Context &ctx); 263 bool cmd_detach(GdbCommand::Context &ctx); 264 bool cmd_reg_r(GdbCommand::Context &ctx); 265 bool cmd_reg_w(GdbCommand::Context &ctx); 266 bool cmd_set_thread(GdbCommand::Context &ctx); 267 bool cmd_mem_r(GdbCommand::Context &ctx); 268 bool cmd_mem_w(GdbCommand::Context &ctx); 269 bool cmd_query_var(GdbCommand::Context &ctx); 270 bool cmd_step(GdbCommand::Context &ctx); 271 bool cmd_async_step(GdbCommand::Context &ctx); 272 bool cmd_clr_hw_bkpt(GdbCommand::Context &ctx); 273 bool cmd_set_hw_bkpt(GdbCommand::Context &ctx); 274 |
275 protected: |
276 ThreadContext *context() { return tc; } 277 System *system() { return sys; } |
278 |
279 // To be implemented by subclasses. 280 virtual bool checkBpLen(size_t len); 281 282 virtual BaseGdbRegCache *gdbRegs() = 0; 283 284 virtual bool acc(Addr addr, size_t len) = 0; |
285}; 286 287template <class T> 288inline T 289BaseRemoteGDB::read(Addr addr) 290{ 291 T temp; 292 read(addr, sizeof(T), (char *)&temp); 293 return temp; 294} 295 296template <class T> 297inline void 298BaseRemoteGDB::write(Addr addr, T data) |
299{ |
300 write(addr, sizeof(T), (const char *)&data); 301} |
302 |
303#endif /* __REMOTE_GDB_H__ */ |