remote_gdb.hh revision 1910
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 29#ifndef __REMOTE_GDB_HH__ 30#define __REMOTE_GDB_HH__ 31 32#include <map> 33 34#include "base/kgdb.h" 35#include "cpu/pc_event.hh" 36#include "base/pollevent.hh" 37#include "base/socket.hh" 38 39class System; 40class ExecContext; 41class PhysicalMemory; 42 43class GDBListener; 44class RemoteGDB 45{ 46 private: 47 friend void debugger(); 48 friend class GDBListener; 49 50 protected: 51 class Event : public PollEvent 52 { 53 protected: 54 RemoteGDB *gdb; 55 56 public: 57 Event(RemoteGDB *g, int fd, int e); 58 void process(int revent); 59 }; 60 61 friend class Event; 62 Event *event; 63 GDBListener *listener; 64 int number; 65 66 protected: 67 int fd; 68 uint64_t gdbregs[KGDB_NUMREGS]; 69 70 protected: 71#ifdef notyet 72 label_t recover; 73#endif 74 bool active; 75 bool attached; 76 77 System *system; 78 PhysicalMemory *pmem; 79 ExecContext *context; 80 81 protected: 82 uint8_t getbyte(); 83 void putbyte(uint8_t b); 84 85 int recv(char *data, int len); 86 void send(const char *data); 87 88 protected: 89 // Machine memory 90 bool read(Addr addr, size_t size, char *data); 91 bool write(Addr addr, size_t size, const char *data); 92 93 template <class T> T read(Addr addr); 94 template <class T> void write(Addr addr, T data); 95 96 public: 97 RemoteGDB(System *system, ExecContext *context); 98 ~RemoteGDB(); 99 100 void replaceExecContext(ExecContext *xc) { context = xc; } 101 102 void attach(int fd); 103 void detach(); 104 bool isattached(); 105 106 bool acc(Addr addr, size_t len); 107 static int signal(int type); 108 bool trap(int type); 109 110 protected: 111 void getregs(); 112 void setregs(); 113 114 void clearSingleStep(); 115 void setSingleStep(); 116 117 PCEventQueue *getPcEventQueue(); 118 119 protected: 120 class HardBreakpoint : public PCEvent 121 { 122 private: 123 RemoteGDB *gdb; 124 125 public: 126 int refcount; 127 128 public: 129 HardBreakpoint(RemoteGDB *_gdb, Addr addr); 130 std::string name() { return gdb->name() + ".hwbkpt"; } 131 132 virtual void process(ExecContext *xc); 133 }; 134 friend class HardBreakpoint; 135 136 typedef std::map<Addr, HardBreakpoint *> break_map_t; 137 typedef break_map_t::iterator break_iter_t; 138 break_map_t hardBreakMap; 139 140 bool insertSoftBreak(Addr addr, size_t len); 141 bool removeSoftBreak(Addr addr, size_t len); 142 bool insertHardBreak(Addr addr, size_t len); 143 bool removeHardBreak(Addr addr, size_t len); 144 145 protected: 146 struct TempBreakpoint { 147 Addr address; // set here 148 MachInst bkpt_inst; // saved instruction at bkpt 149 int init_count; // number of times to skip bkpt 150 int count; // current count 151 }; 152 153 TempBreakpoint notTakenBkpt; 154 TempBreakpoint takenBkpt; 155 156 void clearTempBreakpoint(TempBreakpoint &bkpt); 157 void setTempBreakpoint(TempBreakpoint &bkpt, Addr addr); 158 159 public: 160 std::string name(); 161}; 162 163template <class T> 164inline T 165RemoteGDB::read(Addr addr) 166{ 167 T temp; 168 read(addr, sizeof(T), (char *)&temp); 169 return temp; 170} 171 172template <class T> 173inline void 174RemoteGDB::write(Addr addr, T data) 175{ write(addr, sizeof(T), (const char *)&data); } 176 177class GDBListener 178{ 179 protected: 180 class Event : public PollEvent 181 { 182 protected: 183 GDBListener *listener; 184 185 public: 186 Event(GDBListener *l, int fd, int e); 187 void process(int revent); 188 }; 189 190 friend class Event; 191 Event *event; 192 193 protected: 194 ListenSocket listener; 195 RemoteGDB *gdb; 196 int port; 197 198 public: 199 GDBListener(RemoteGDB *g, int p); 200 ~GDBListener(); 201 202 void accept(); 203 void listen(); 204 std::string name(); 205}; 206 207#endif /* __REMOTE_GDB_H__ */ 208