remote_gdb.hh revision 3536:89aa06409e4d 
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 __ARCH_ALPHA_REMOTE_GDB_HH__
32#define __ARCH_ALPHA_REMOTE_GDB_HH__
33
34#include <map>
35
36#include "arch/alpha/types.hh"
37#include "arch/alpha/kgdb.h"
38#include "base/remote_gdb.hh"
39#include "cpu/pc_event.hh"
40#include "base/pollevent.hh"
41#include "base/socket.hh"
42
43class System;
44class ThreadContext;
45class PhysicalMemory;
46
47namespace AlphaISA
48{
49    class RemoteGDB : public BaseRemoteGDB
50    {
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
69      protected:
70        // Machine memory
71        bool write(Addr addr, size_t size, const char *data);
72
73      public:
74        RemoteGDB(System *system, ThreadContext *context);
75        ~RemoteGDB();
76
77        bool acc(Addr addr, size_t len);
78
79      protected:
80        void getregs();
81        void setregs();
82
83        void clearSingleStep();
84        void setSingleStep();
85
86        PCEventQueue *getPcEventQueue();
87
88      protected:
89        class HardBreakpoint : public PCEvent
90        {
91          private:
92            RemoteGDB *gdb;
93
94          public:
95            int refcount;
96
97          public:
98            HardBreakpoint(RemoteGDB *_gdb, Addr addr);
99            std::string name() { return gdb->name() + ".hwbkpt"; }
100
101            virtual void process(ThreadContext *tc);
102        };
103        friend class HardBreakpoint;
104
105        typedef std::map<Addr, HardBreakpoint *> break_map_t;
106        typedef break_map_t::iterator break_iter_t;
107        break_map_t hardBreakMap;
108
109        bool insertSoftBreak(Addr addr, size_t len);
110        bool removeSoftBreak(Addr addr, size_t len);
111        bool insertHardBreak(Addr addr, size_t len);
112        bool removeHardBreak(Addr addr, size_t len);
113
114      protected:
115        struct TempBreakpoint {
116            Addr	address;		// set here
117            MachInst	bkpt_inst;		// saved instruction at bkpt
118            int		init_count;		// number of times to skip bkpt
119            int		count;			// current count
120        };
121
122        TempBreakpoint notTakenBkpt;
123        TempBreakpoint takenBkpt;
124
125        void clearTempBreakpoint(TempBreakpoint &bkpt);
126        void setTempBreakpoint(TempBreakpoint &bkpt, Addr addr);
127    };
128}
129
130#endif /* __ARCH_ALPHA_REMOTE_GDB_H__ */
131