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/*
* Copyright (c) 2003 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __REMOTE_GDB_HH__
#define __REMOTE_GDB_HH__
#include "kgdb.h"
#include "pc_event.hh"
#include "pollevent.hh"
#include "socket.hh"
class System;
class ExecContext;
class PhysicalMemory;
class RemoteGDB
{
protected:
class Event : public PollEvent
{
protected:
RemoteGDB *gdb;
public:
Event(RemoteGDB *g, int fd, int e);
void process(int revent);
};
friend class Event;
Event *event;
protected:
int fd;
uint64_t gdbregs[KGDB_NUMREGS];
protected:
#ifdef notyet
label_t recover;
#endif
bool active;
bool attached;
System *system;
PhysicalMemory *pmem;
ExecContext *context;
protected:
uint8_t getbyte();
void putbyte(uint8_t b);
int recv(char *data, int len);
void send(const char *data);
protected:
// Machine memory
bool read(Addr addr, size_t size, char *data);
bool write(Addr addr, size_t size, const char *data);
template <class T> T read(Addr addr);
template <class T> void write(Addr addr, T data);
public:
RemoteGDB(System *system, ExecContext *context);
~RemoteGDB();
void attach(int fd);
void detach();
bool isattached();
bool acc(Addr addr, size_t len);
static int signal(int type);
bool trap(int type);
protected:
void getregs();
void setregs();
void clearSingleStep();
void setSingleStep();
PCEventQueue *getPcEventQueue();
protected:
class HardBreakpoint : public PCEvent
{
private:
RemoteGDB *gdb;
public:
HardBreakpoint(RemoteGDB *_gdb, Addr addr);
int refcount;
virtual void process(ExecContext *xc);
};
friend class HardBreakpoint;
typedef std::map<Addr, HardBreakpoint *> break_map_t;
typedef break_map_t::iterator break_iter_t;
break_map_t hardBreakMap;
bool insertSoftBreak(Addr addr, size_t len);
bool removeSoftBreak(Addr addr, size_t len);
bool insertHardBreak(Addr addr, size_t len);
bool removeHardBreak(Addr addr, size_t len);
protected:
struct TempBreakpoint {
Addr address; // set here
MachInst bkpt_inst; // saved instruction at bkpt
int init_count; // number of times to skip bkpt
int count; // current count
};
TempBreakpoint notTakenBkpt;
TempBreakpoint takenBkpt;
void clearTempBreakpoint(TempBreakpoint &bkpt);
void setTempBreakpoint(TempBreakpoint &bkpt, Addr addr);
};
template <class T>
inline T
RemoteGDB::read(Addr addr)
{
T temp;
read(addr, sizeof(T), (char *)&temp);
return temp;
}
template <class T>
inline void
RemoteGDB::write(Addr addr, T data)
{ write(addr, sizeof(T), (const char *)&data); }
class GDBListener
{
protected:
class Event : public PollEvent
{
protected:
GDBListener *listener;
public:
Event(GDBListener *l, int fd, int e);
void process(int revent);
};
friend class Event;
Event *event;
protected:
ListenSocket listener;
RemoteGDB *gdb;
int port;
public:
GDBListener(RemoteGDB *g, int p);
~GDBListener();
void accept();
void listen();
};
#endif /* __REMOTE_GDB_H__ */
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