remote_gdb.hh revision 56
1/* 2 * Copyright (c) 2003 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 "base/kgdb.h" 33#include "cpu/pc_event.hh" 34#include "base/pollevent.hh" 35#include "base/socket.hh" 36 37class System; 38class ExecContext; 39class PhysicalMemory; 40 41class RemoteGDB 42{ 43 protected: 44 class Event : public PollEvent 45 { 46 protected: 47 RemoteGDB *gdb; 48 49 public: 50 Event(RemoteGDB *g, int fd, int e); 51 void process(int revent); 52 }; 53 54 friend class Event; 55 Event *event; 56 57 protected: 58 int fd; 59 uint64_t gdbregs[KGDB_NUMREGS]; 60 61 protected: 62#ifdef notyet 63 label_t recover; 64#endif 65 bool active; 66 bool attached; 67 68 System *system; 69 PhysicalMemory *pmem; 70 ExecContext *context; 71 72 protected: 73 uint8_t getbyte(); 74 void putbyte(uint8_t b); 75 76 int recv(char *data, int len); 77 void send(const char *data); 78 79 protected: 80 // Machine memory 81 bool read(Addr addr, size_t size, char *data); 82 bool write(Addr addr, size_t size, const char *data); 83 84 template <class T> T read(Addr addr); 85 template <class T> void write(Addr addr, T data); 86 87 public: 88 RemoteGDB(System *system, ExecContext *context); 89 ~RemoteGDB(); 90 91 void attach(int fd); 92 void detach(); 93 bool isattached(); 94 95 bool acc(Addr addr, size_t len); 96 static int signal(int type); 97 bool trap(int type); 98 99 protected: 100 void getregs(); 101 void setregs(); 102 103 void clearSingleStep(); 104 void setSingleStep(); 105 106 PCEventQueue *getPcEventQueue(); 107 108 protected: 109 class HardBreakpoint : public PCEvent 110 { 111 private: 112 RemoteGDB *gdb; 113 114 public: 115 HardBreakpoint(RemoteGDB *_gdb, Addr addr); 116 117 int refcount; 118 virtual void process(ExecContext *xc); 119 }; 120 friend class HardBreakpoint; 121 122 typedef std::map<Addr, HardBreakpoint *> break_map_t; 123 typedef break_map_t::iterator break_iter_t; 124 break_map_t hardBreakMap; 125 126 bool insertSoftBreak(Addr addr, size_t len); 127 bool removeSoftBreak(Addr addr, size_t len); 128 bool insertHardBreak(Addr addr, size_t len); 129 bool removeHardBreak(Addr addr, size_t len); 130 131 protected: 132 struct TempBreakpoint { 133 Addr address; // set here 134 MachInst bkpt_inst; // saved instruction at bkpt 135 int init_count; // number of times to skip bkpt 136 int count; // current count 137 }; 138 139 TempBreakpoint notTakenBkpt; 140 TempBreakpoint takenBkpt; 141 142 void clearTempBreakpoint(TempBreakpoint &bkpt); 143 void setTempBreakpoint(TempBreakpoint &bkpt, Addr addr); 144}; 145 146template <class T> 147inline T 148RemoteGDB::read(Addr addr) 149{ 150 T temp; 151 read(addr, sizeof(T), (char *)&temp); 152 return temp; 153} 154 155template <class T> 156inline void 157RemoteGDB::write(Addr addr, T data) 158{ write(addr, sizeof(T), (const char *)&data); } 159 160class GDBListener 161{ 162 protected: 163 class Event : public PollEvent 164 { 165 protected: 166 GDBListener *listener; 167 168 public: 169 Event(GDBListener *l, int fd, int e); 170 void process(int revent); 171 }; 172 173 friend class Event; 174 Event *event; 175 176 protected: 177 ListenSocket listener; 178 RemoteGDB *gdb; 179 int port; 180 181 public: 182 GDBListener(RemoteGDB *g, int p); 183 ~GDBListener(); 184 185 void accept(); 186 void listen(); 187}; 188 189#endif /* __REMOTE_GDB_H__ */ 190