remote_gdb.hh revision 2986
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 "arch/types.hh" 37#include "base/kgdb.h" 38#include "cpu/pc_event.hh" 39#include "base/pollevent.hh" 40#include "base/socket.hh" 41 42class System; 43class ThreadContext; 44class PhysicalMemory; 45 46class GDBListener; 47class RemoteGDB 48{ 49 protected: 50 typedef TheISA::MachInst MachInst; 51 private: 52 friend void debugger(); 53 friend class GDBListener; 54 55 protected: 56 class Event : public PollEvent 57 { 58 protected: 59 RemoteGDB *gdb; 60 61 public: 62 Event(RemoteGDB *g, int fd, int e); 63 void process(int revent); 64 }; 65 66 friend class Event; 67 Event *event; 68 GDBListener *listener; 69 int number; 70 71 protected: 72 int fd; 73 uint64_t gdbregs[KGDB_NUMREGS]; 74 75 protected: 76#ifdef notyet 77 label_t recover; 78#endif 79 bool active; 80 bool attached; 81 82 System *system; 83 PhysicalMemory *pmem; 84 ThreadContext *context; 85 86 protected: 87 uint8_t getbyte(); 88 void putbyte(uint8_t b); 89 90 int recv(char *data, int len); 91 void send(const char *data); 92 93 protected: 94 // Machine memory 95 bool read(Addr addr, size_t size, char *data); 96 bool write(Addr addr, size_t size, const char *data); 97 98 template <class T> T read(Addr addr); 99 template <class T> void write(Addr addr, T data); 100 101 public: 102 RemoteGDB(System *system, ThreadContext *context); 103 ~RemoteGDB(); 104 105 void replaceThreadContext(ThreadContext *tc) { context = tc; } 106 107 void attach(int fd); 108 void detach(); 109 bool isattached(); 110 111 bool acc(Addr addr, size_t len); 112 static int signal(int type); 113 bool trap(int type); 114 115 protected: 116 void getregs(); 117 void setregs(); 118 119 void clearSingleStep(); 120 void setSingleStep(); 121 122 PCEventQueue *getPcEventQueue(); 123 124 protected: 125 class HardBreakpoint : public PCEvent 126 { 127 private: 128 RemoteGDB *gdb; 129 130 public: 131 int refcount; 132 133 public: 134 HardBreakpoint(RemoteGDB *_gdb, Addr addr); 135 std::string name() { return gdb->name() + ".hwbkpt"; } 136 137 virtual void process(ThreadContext *tc); 138 }; 139 friend class HardBreakpoint; 140 141 typedef std::map<Addr, HardBreakpoint *> break_map_t; 142 typedef break_map_t::iterator break_iter_t; 143 break_map_t hardBreakMap; 144 145 bool insertSoftBreak(Addr addr, size_t len); 146 bool removeSoftBreak(Addr addr, size_t len); 147 bool insertHardBreak(Addr addr, size_t len); 148 bool removeHardBreak(Addr addr, size_t len); 149 150 protected: 151 struct TempBreakpoint { 152 Addr address; // set here 153 MachInst bkpt_inst; // saved instruction at bkpt 154 int init_count; // number of times to skip bkpt 155 int count; // current count 156 }; 157 158 TempBreakpoint notTakenBkpt; 159 TempBreakpoint takenBkpt; 160 161 void clearTempBreakpoint(TempBreakpoint &bkpt); 162 void setTempBreakpoint(TempBreakpoint &bkpt, Addr addr); 163 164 public: 165 std::string name(); 166}; 167 168template <class T> 169inline T 170RemoteGDB::read(Addr addr) 171{ 172 T temp; 173 read(addr, sizeof(T), (char *)&temp); 174 return temp; 175} 176 177template <class T> 178inline void 179RemoteGDB::write(Addr addr, T data) 180{ write(addr, sizeof(T), (const char *)&data); } 181 182class GDBListener 183{ 184 protected: 185 class Event : public PollEvent 186 { 187 protected: 188 GDBListener *listener; 189 190 public: 191 Event(GDBListener *l, int fd, int e); 192 void process(int revent); 193 }; 194 195 friend class Event; 196 Event *event; 197 198 protected: 199 ListenSocket listener; 200 RemoteGDB *gdb; 201 int port; 202 203 public: 204 GDBListener(RemoteGDB *g, int p); 205 ~GDBListener(); 206 207 void accept(); 208 void listen(); 209 std::string name(); 210}; 211 212#endif /* __REMOTE_GDB_H__ */ 213