base/remote_gdb.cc: Keep track of a vector of all of the usable debuggers and provide a current_debugger variable that can be set from gdb to specify which remote debugger is desired. If debugger() is called and the current_debugger is not attached, call accept on its listener so we can still attach a remote debugger from the gdb prompt if we had forgotten to before. Print out more information when the simulator starts so we can distinguish debuggers more easily. base/remote_gdb.hh: Have a remote debugger instance keep track of its listener. Number the remote debuggers so it's easier to figure out which is which. --HG-- extra : convert_revision : 97119597ac3772ea4df6da3b3a4827f50253a51f
207 lines
5 KiB
C++
207 lines
5 KiB
C++
/*
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* Copyright (c) 2002-2005 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __REMOTE_GDB_HH__
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#define __REMOTE_GDB_HH__
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#include <map>
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#include "base/kgdb.h"
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#include "cpu/pc_event.hh"
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#include "base/pollevent.hh"
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#include "base/socket.hh"
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class System;
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class ExecContext;
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class PhysicalMemory;
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class GDBListener;
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class RemoteGDB
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{
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private:
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friend void debugger();
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friend class GDBListener;
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protected:
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class Event : public PollEvent
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{
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protected:
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RemoteGDB *gdb;
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public:
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Event(RemoteGDB *g, int fd, int e);
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void process(int revent);
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};
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friend class Event;
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Event *event;
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GDBListener *listener;
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int number;
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protected:
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int fd;
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uint64_t gdbregs[KGDB_NUMREGS];
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protected:
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#ifdef notyet
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label_t recover;
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#endif
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bool active;
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bool attached;
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System *system;
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PhysicalMemory *pmem;
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ExecContext *context;
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protected:
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uint8_t getbyte();
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void putbyte(uint8_t b);
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int recv(char *data, int len);
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void send(const char *data);
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protected:
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// Machine memory
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bool read(Addr addr, size_t size, char *data);
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bool write(Addr addr, size_t size, const char *data);
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template <class T> T read(Addr addr);
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template <class T> void write(Addr addr, T data);
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public:
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RemoteGDB(System *system, ExecContext *context);
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~RemoteGDB();
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void replaceExecContext(ExecContext *xc) { context = xc; }
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void attach(int fd);
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void detach();
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bool isattached();
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bool acc(Addr addr, size_t len);
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static int signal(int type);
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bool trap(int type);
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protected:
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void getregs();
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void setregs();
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void clearSingleStep();
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void setSingleStep();
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PCEventQueue *getPcEventQueue();
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protected:
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class HardBreakpoint : public PCEvent
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{
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private:
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RemoteGDB *gdb;
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public:
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int refcount;
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public:
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HardBreakpoint(RemoteGDB *_gdb, Addr addr);
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std::string name() { return gdb->name() + ".hwbkpt"; }
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virtual void process(ExecContext *xc);
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};
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friend class HardBreakpoint;
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typedef std::map<Addr, HardBreakpoint *> break_map_t;
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typedef break_map_t::iterator break_iter_t;
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break_map_t hardBreakMap;
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bool insertSoftBreak(Addr addr, size_t len);
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bool removeSoftBreak(Addr addr, size_t len);
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bool insertHardBreak(Addr addr, size_t len);
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bool removeHardBreak(Addr addr, size_t len);
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protected:
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struct TempBreakpoint {
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Addr address; // set here
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MachInst bkpt_inst; // saved instruction at bkpt
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int init_count; // number of times to skip bkpt
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int count; // current count
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};
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TempBreakpoint notTakenBkpt;
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TempBreakpoint takenBkpt;
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void clearTempBreakpoint(TempBreakpoint &bkpt);
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void setTempBreakpoint(TempBreakpoint &bkpt, Addr addr);
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public:
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std::string name();
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};
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template <class T>
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inline T
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RemoteGDB::read(Addr addr)
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{
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T temp;
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read(addr, sizeof(T), (char *)&temp);
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return temp;
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}
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template <class T>
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inline void
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RemoteGDB::write(Addr addr, T data)
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{ write(addr, sizeof(T), (const char *)&data); }
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class GDBListener
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{
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protected:
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class Event : public PollEvent
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{
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protected:
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GDBListener *listener;
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public:
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Event(GDBListener *l, int fd, int e);
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void process(int revent);
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};
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friend class Event;
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Event *event;
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protected:
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ListenSocket listener;
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RemoteGDB *gdb;
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int port;
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public:
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GDBListener(RemoteGDB *g, int p);
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~GDBListener();
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void accept();
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void listen();
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std::string name();
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};
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#endif /* __REMOTE_GDB_H__ */
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