remote_gdb.hh revision 180
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 replaceExecContext(ExecContext *xc) { context = xc; } 94 95 void attach(int fd); 96 void detach(); 97 bool isattached(); 98 99 bool acc(Addr addr, size_t len); 100 static int signal(int type); 101 bool trap(int type); 102 103 protected: 104 void getregs(); 105 void setregs(); 106 107 void clearSingleStep(); 108 void setSingleStep(); 109 110 PCEventQueue *getPcEventQueue(); 111 112 protected: 113 class HardBreakpoint : public PCEvent 114 { 115 private: 116 RemoteGDB *gdb; 117 118 public: 119 HardBreakpoint(RemoteGDB *_gdb, Addr addr); 120 121 int refcount; 122 virtual void process(ExecContext *xc); 123 }; 124 friend class HardBreakpoint; 125 126 typedef std::map<Addr, HardBreakpoint *> break_map_t; 127 typedef break_map_t::iterator break_iter_t; 128 break_map_t hardBreakMap; 129 130 bool insertSoftBreak(Addr addr, size_t len); 131 bool removeSoftBreak(Addr addr, size_t len); 132 bool insertHardBreak(Addr addr, size_t len); 133 bool removeHardBreak(Addr addr, size_t len); 134 135 protected: 136 struct TempBreakpoint { 137 Addr address; // set here 138 MachInst bkpt_inst; // saved instruction at bkpt 139 int init_count; // number of times to skip bkpt 140 int count; // current count 141 }; 142 143 TempBreakpoint notTakenBkpt; 144 TempBreakpoint takenBkpt; 145 146 void clearTempBreakpoint(TempBreakpoint &bkpt); 147 void setTempBreakpoint(TempBreakpoint &bkpt, Addr addr); 148}; 149 150template <class T> 151inline T 152RemoteGDB::read(Addr addr) 153{ 154 T temp; 155 read(addr, sizeof(T), (char *)&temp); 156 return temp; 157} 158 159template <class T> 160inline void 161RemoteGDB::write(Addr addr, T data) 162{ write(addr, sizeof(T), (const char *)&data); } 163 164class GDBListener 165{ 166 protected: 167 class Event : public PollEvent 168 { 169 protected: 170 GDBListener *listener; 171 172 public: 173 Event(GDBListener *l, int fd, int e); 174 void process(int revent); 175 }; 176 177 friend class Event; 178 Event *event; 179 180 protected: 181 ListenSocket listener; 182 RemoteGDB *gdb; 183 int port; 184 185 public: 186 GDBListener(RemoteGDB *g, int p); 187 ~GDBListener(); 188 189 void accept(); 190 void listen(); 191}; 192 193#endif /* __REMOTE_GDB_H__ */ 194