remote_gdb.hh revision 2665
1/* 2 * Copyright (c) 2002-2005 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Nathan Binkert 29 */ 30 31#ifndef __REMOTE_GDB_HH__ 32#define __REMOTE_GDB_HH__ 33 34#include <map> 35 36#include "base/kgdb.h" 37#include "cpu/pc_event.hh" 38#include "base/pollevent.hh" 39#include "base/socket.hh" 40 41class System; 42class ExecContext; 43class PhysicalMemory; 44 45class GDBListener; 46class RemoteGDB 47{ 48 protected: 49 typedef TheISA::MachInst MachInst; 50 private: 51 friend void debugger(); 52 friend class GDBListener; 53 54 protected: 55 class Event : public PollEvent 56 { 57 protected: 58 RemoteGDB *gdb; 59 60 public: 61 Event(RemoteGDB *g, int fd, int e); 62 void process(int revent); 63 }; 64 65 friend class Event; 66 Event *event; 67 GDBListener *listener; 68 int number; 69 70 protected: 71 int fd; 72 uint64_t gdbregs[KGDB_NUMREGS]; 73 74 protected: 75#ifdef notyet 76 label_t recover; 77#endif 78 bool active; 79 bool attached; 80 81 System *system; 82 PhysicalMemory *pmem; 83 ExecContext *context; 84 85 protected: 86 uint8_t getbyte(); 87 void putbyte(uint8_t b); 88 89 int recv(char *data, int len); 90 void send(const char *data); 91 92 protected: 93 // Machine memory 94 bool read(Addr addr, size_t size, char *data); 95 bool write(Addr addr, size_t size, const char *data); 96 97 template <class T> T read(Addr addr); 98 template <class T> void write(Addr addr, T data); 99 100 public: 101 RemoteGDB(System *system, ExecContext *context); 102 ~RemoteGDB(); 103 104 void replaceExecContext(ExecContext *xc) { context = xc; } 105 106 void attach(int fd); 107 void detach(); 108 bool isattached(); 109 110 bool acc(Addr addr, size_t len); 111 static int signal(int type); 112 bool trap(int type); 113 114 protected: 115 void getregs(); 116 void setregs(); 117 118 void clearSingleStep(); 119 void setSingleStep(); 120 121 PCEventQueue *getPcEventQueue(); 122 123 protected: 124 class HardBreakpoint : public PCEvent 125 { 126 private: 127 RemoteGDB *gdb; 128 129 public: 130 int refcount; 131 132 public: 133 HardBreakpoint(RemoteGDB *_gdb, Addr addr); 134 std::string name() { return gdb->name() + ".hwbkpt"; } 135 136 virtual void process(ExecContext *xc); 137 }; 138 friend class HardBreakpoint; 139 140 typedef std::map<Addr, HardBreakpoint *> break_map_t; 141 typedef break_map_t::iterator break_iter_t; 142 break_map_t hardBreakMap; 143 144 bool insertSoftBreak(Addr addr, size_t len); 145 bool removeSoftBreak(Addr addr, size_t len); 146 bool insertHardBreak(Addr addr, size_t len); 147 bool removeHardBreak(Addr addr, size_t len); 148 149 protected: 150 struct TempBreakpoint { 151 Addr address; // set here 152 MachInst bkpt_inst; // saved instruction at bkpt 153 int init_count; // number of times to skip bkpt 154 int count; // current count 155 }; 156 157 TempBreakpoint notTakenBkpt; 158 TempBreakpoint takenBkpt; 159 160 void clearTempBreakpoint(TempBreakpoint &bkpt); 161 void setTempBreakpoint(TempBreakpoint &bkpt, Addr addr); 162 163 public: 164 std::string name(); 165}; 166 167template <class T> 168inline T 169RemoteGDB::read(Addr addr) 170{ 171 T temp; 172 read(addr, sizeof(T), (char *)&temp); 173 return temp; 174} 175 176template <class T> 177inline void 178RemoteGDB::write(Addr addr, T data) 179{ write(addr, sizeof(T), (const char *)&data); } 180 181class GDBListener 182{ 183 protected: 184 class Event : public PollEvent 185 { 186 protected: 187 GDBListener *listener; 188 189 public: 190 Event(GDBListener *l, int fd, int e); 191 void process(int revent); 192 }; 193 194 friend class Event; 195 Event *event; 196 197 protected: 198 ListenSocket listener; 199 RemoteGDB *gdb; 200 int port; 201 202 public: 203 GDBListener(RemoteGDB *g, int p); 204 ~GDBListener(); 205 206 void accept(); 207 void listen(); 208 std::string name(); 209}; 210 211#endif /* __REMOTE_GDB_H__ */ 212