text: /*
   * Copyright 2015 LabWare
   * Copyright 2014 Google, Inc.
   * Copyright (c) 2010 ARM Limited
   * All rights reserved
   *
   * The license below extends only to copyright in the software and shall
   * not be construed as granting a license to any other intellectual
   * property including but not limited to intellectual property relating
   * to a hardware implementation of the functionality of the software
   * licensed hereunder.  You may use the software subject to the license
   * terms below provided that you ensure that this notice is replicated
   * unmodified and in its entirety in all distributions of the software,
   * modified or unmodified, in source code or in binary form.
   *
   * Copyright (c) 2002-2005 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.
   *
   * Authors: Nathan Binkert
   *          William Wang
   *          Deyuan Guo
   *          Boris Shingarov
   */
  
  /*
   * Copyright (c) 1990, 1993 The Regents of the University of California
   * All rights reserved
   *
   * This software was developed by the Computer Systems Engineering group
   * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
   * contributed to Berkeley.
   *
   * All advertising materials mentioning features or use of this software
   * must display the following acknowledgement:
   *      This product includes software developed by the University of
   *      California, Lawrence Berkeley Laboratories.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. 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.
   * 3. All advertising materials mentioning features or use of this software
   *    must display the following acknowledgement:
   *      This product includes software developed by the University of
   *      California, Berkeley and its contributors.
   * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
   *
   *      @(#)kgdb_stub.c 8.4 (Berkeley) 1/12/94
   */
  
  /*-
   * Copyright (c) 2001 The NetBSD Foundation, Inc.
   * All rights reserved.
   *
   * This code is derived from software contributed to The NetBSD Foundation
   * by Jason R. Thorpe.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. 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.
   * 3. All advertising materials mentioning features or use of this software
   *    must display the following acknowledgement:
   *      This product includes software developed by the NetBSD
   *      Foundation, Inc. and its contributors.
   * 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
   */
  
  /*
   * $NetBSD: kgdb_stub.c,v 1.8 2001/07/07 22:58:00 wdk Exp $
   *
   * Taken from NetBSD
   *
   * "Stub" to allow remote cpu to debug over a serial line using gdb.
   */
  
  #include "arch/mips/remote_gdb.hh"
  
  #include <sys/signal.h>
  #include <unistd.h>
  
  #include <string>
  
  #include "arch/mips/decoder.hh"
  #include "arch/mips/vtophys.hh"
  #include "cpu/thread_state.hh"
  #include "debug/GDBAcc.hh"
  #include "debug/GDBMisc.hh"
  #include "mem/page_table.hh"
  #include "sim/full_system.hh"
  
  using namespace std;
  using namespace MipsISA;
  
  RemoteGDB::RemoteGDB(System *_system, ThreadContext *tc, int _port)
      : BaseRemoteGDB(_system, tc, _port), regCache(this)
  {
  }
  
  /*
   * Determine if the mapping at va..(va+len) is valid.
   */
  bool
  RemoteGDB::acc(Addr va, size_t len)
  {
      // Check to make sure the first byte is mapped into the processes address
      // space.
      panic_if(FullSystem, "acc not implemented for MIPS FS!");
      return context()->getProcessPtr()->pTable->lookup(va) != nullptr;
  }
  
  void
  RemoteGDB::MipsGdbRegCache::getRegs(ThreadContext *context)
  {
      DPRINTF(GDBAcc, "getregs in remotegdb \n");
  
      for (int i = 0; i < 32; i++) r.gpr[i] = context->readIntReg(i);
      r.sr = context->readMiscRegNoEffect(MISCREG_STATUS);
      r.lo = context->readIntReg(INTREG_LO);
      r.hi = context->readIntReg(INTREG_HI);
      r.badvaddr = context->readMiscRegNoEffect(MISCREG_BADVADDR);
      r.cause = context->readMiscRegNoEffect(MISCREG_CAUSE);
      r.pc = context->pcState().pc();
      for (int i = 0; i < 32; i++) r.fpr[i] = context->readFloatRegBits(i);
      r.fsr = context->readFloatRegBits(FLOATREG_FCCR);
      r.fir = context->readFloatRegBits(FLOATREG_FIR);
  }
  
  void
  RemoteGDB::MipsGdbRegCache::setRegs(ThreadContext *context) const
  {
      DPRINTF(GDBAcc, "setregs in remotegdb \n");
  
      for (int i = 1; i < 32; i++) context->setIntReg(i, r.gpr[i]);
      context->setMiscRegNoEffect(MISCREG_STATUS, r.sr);
      context->setIntReg(INTREG_LO, r.lo);
      context->setIntReg(INTREG_HI, r.hi);
      context->setMiscRegNoEffect(MISCREG_BADVADDR, r.badvaddr);
      context->setMiscRegNoEffect(MISCREG_CAUSE, r.cause);
      context->pcState(r.pc);
      for (int i = 0; i < 32; i++) context->setFloatRegBits(i, r.fpr[i]);
      context->setFloatRegBits(FLOATREG_FCCR, r.fsr);
      context->setFloatRegBits(FLOATREG_FIR, r.fir);
  }
  
  BaseGdbRegCache*
  RemoteGDB::gdbRegs()
  {
      return &regCache;
  }
  