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