src/arch/arm/remote_gdb.cc - amd/gem5 - Git at Google

 /*
  * Copyright 2015 LabWare
  * Copyright 2014 Google Inc.
  * Copyright (c) 2010, 2013, 2016 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
  *          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/arm/remote_gdb.hh"

 #include <sys/signal.h>
 #include <unistd.h>

 #include <string>

 #include "arch/arm/decoder.hh"
 #include "arch/arm/pagetable.hh"
 #include "arch/arm/registers.hh"
 #include "arch/arm/system.hh"
 #include "arch/arm/utility.hh"
 #include "arch/arm/vtophys.hh"
 #include "base/chunk_generator.hh"
 #include "base/intmath.hh"
 #include "base/remote_gdb.hh"
 #include "base/socket.hh"
 #include "base/trace.hh"
 #include "cpu/static_inst.hh"
 #include "cpu/thread_context.hh"
 #include "cpu/thread_state.hh"
 #include "debug/GDBAcc.hh"
 #include "debug/GDBMisc.hh"
 #include "mem/page_table.hh"
 #include "mem/physical.hh"
 #include "mem/port.hh"
 #include "sim/full_system.hh"
 #include "sim/system.hh"

 using namespace std;
 using namespace ArmISA;

 RemoteGDB::RemoteGDB(System *_system, ThreadContext *tc)
     : BaseRemoteGDB(_system, tc), regCache32(this), regCache64(this)
 {
 }

 /*
  * Determine if the mapping at va..(va+len) is valid.
  */
 bool
 RemoteGDB::acc(Addr va, size_t len)
 {
     if (FullSystem) {
         for (ChunkGenerator gen(va, len, PageBytes); !gen.done(); gen.next()) {
             if (!virtvalid(context, gen.addr())) {
                 DPRINTF(GDBAcc, "acc:   %#x mapping is invalid\n", va);
                 return false;
             }
         }

         DPRINTF(GDBAcc, "acc:   %#x mapping is valid\n", va);
         return true;
     } else {
         TlbEntry entry;
         //Check to make sure the first byte is mapped into the processes address
         //space.
         if (context->getProcessPtr()->pTable->lookup(va, entry))
             return true;
         return false;
     }
 }

 void
 RemoteGDB::AArch64GdbRegCache::getRegs(ThreadContext *context)
 {
     DPRINTF(GDBAcc, "getRegs in remotegdb \n");

     for (int i = 0; i < 31; ++i)
         r.x[i] = context->readIntReg(INTREG_X0 + i);
     r.spx = context->readIntReg(INTREG_SPX);
     r.pc = context->pcState().pc();
     r.cpsr = context->readMiscRegNoEffect(MISCREG_CPSR);

     for (int i = 0; i < 32*4; i += 4) {
         r.v[i + 0] = context->readFloatRegBits(i + 2);
         r.v[i + 1] = context->readFloatRegBits(i + 3);
         r.v[i + 2] = context->readFloatRegBits(i + 0);
         r.v[i + 3] = context->readFloatRegBits(i + 1);
     }

     for (int i = 0; i < 32; i ++) {
         r.vec[i] = context->readVecReg(RegId(VecRegClass,i));
     }
 }

 void
 RemoteGDB::AArch64GdbRegCache::setRegs(ThreadContext *context) const
 {
     DPRINTF(GDBAcc, "setRegs in remotegdb \n");

     for (int i = 0; i < 31; ++i)
         context->setIntReg(INTREG_X0 + i, r.x[i]);
     context->pcState(r.pc);
     context->setMiscRegNoEffect(MISCREG_CPSR, r.cpsr);
     // Update the stack pointer. This should be done after
     // updating CPSR/PSTATE since that might affect how SPX gets
     // mapped.
     context->setIntReg(INTREG_SPX, r.spx);

     for (int i = 0; i < 32*4; i += 4) {
         context->setFloatRegBits(i + 2, r.v[i + 0]);
         context->setFloatRegBits(i + 3, r.v[i + 1]);
         context->setFloatRegBits(i + 0, r.v[i + 2]);
         context->setFloatRegBits(i + 1, r.v[i + 3]);
     }

     for (int i = 0; i < 32; i ++) {
         context->setVecReg(RegId(VecRegClass, i), r.vec[i]);
     }
 }

 void
 RemoteGDB::AArch32GdbRegCache::getRegs(ThreadContext *context)
 {
     DPRINTF(GDBAcc, "getRegs in remotegdb \n");

     r.gpr[0] = context->readIntReg(INTREG_R0);
     r.gpr[1] = context->readIntReg(INTREG_R1);
     r.gpr[2] = context->readIntReg(INTREG_R2);
     r.gpr[3] = context->readIntReg(INTREG_R3);
     r.gpr[4] = context->readIntReg(INTREG_R4);
     r.gpr[5] = context->readIntReg(INTREG_R5);
     r.gpr[6] = context->readIntReg(INTREG_R6);
     r.gpr[7] = context->readIntReg(INTREG_R7);
     r.gpr[8] = context->readIntReg(INTREG_R8);
     r.gpr[9] = context->readIntReg(INTREG_R9);
     r.gpr[10] = context->readIntReg(INTREG_R10);
     r.gpr[11] = context->readIntReg(INTREG_R11);
     r.gpr[12] = context->readIntReg(INTREG_R12);
     r.gpr[13] = context->readIntReg(INTREG_SP);
     r.gpr[14] = context->readIntReg(INTREG_LR);
     r.gpr[15] = context->pcState().pc();

     // One day somebody will implement transfer of FPRs correctly.
     for (int i=0; i<8*3; i++) r.fpr[i] = 0;

     r.fpscr = context->readMiscRegNoEffect(MISCREG_FPSCR);
     r.cpsr = context->readMiscRegNoEffect(MISCREG_CPSR);
 }

 void
 RemoteGDB::AArch32GdbRegCache::setRegs(ThreadContext *context) const
 {
     DPRINTF(GDBAcc, "setRegs in remotegdb \n");

     context->setIntReg(INTREG_R0, r.gpr[0]);
     context->setIntReg(INTREG_R1, r.gpr[1]);
     context->setIntReg(INTREG_R2, r.gpr[2]);
     context->setIntReg(INTREG_R3, r.gpr[3]);
     context->setIntReg(INTREG_R4, r.gpr[4]);
     context->setIntReg(INTREG_R5, r.gpr[5]);
     context->setIntReg(INTREG_R6, r.gpr[6]);
     context->setIntReg(INTREG_R7, r.gpr[7]);
     context->setIntReg(INTREG_R8, r.gpr[8]);
     context->setIntReg(INTREG_R9, r.gpr[9]);
     context->setIntReg(INTREG_R10, r.gpr[10]);
     context->setIntReg(INTREG_R11, r.gpr[11]);
     context->setIntReg(INTREG_R12, r.gpr[12]);
     context->setIntReg(INTREG_SP, r.gpr[13]);
     context->setIntReg(INTREG_LR, r.gpr[14]);
     context->pcState(r.gpr[15]);

     // One day somebody will implement transfer of FPRs correctly.

     context->setMiscReg(MISCREG_FPSCR, r.fpscr);
     context->setMiscRegNoEffect(MISCREG_CPSR, r.cpsr);
 }

 RemoteGDB::BaseGdbRegCache*
 RemoteGDB::gdbRegs()
 {
     if (inAArch64(context))
         return &regCache64;
     else
         return &regCache32;
 }
	/*
	* Copyright 2015 LabWare
	* Copyright 2014 Google Inc.
	* Copyright (c) 2010, 2013, 2016 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
	* 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/arm/remote_gdb.hh"

	#include <sys/signal.h>
	#include <unistd.h>

	#include <string>

	#include "arch/arm/decoder.hh"
	#include "arch/arm/pagetable.hh"
	#include "arch/arm/registers.hh"
	#include "arch/arm/system.hh"
	#include "arch/arm/utility.hh"
	#include "arch/arm/vtophys.hh"
	#include "base/chunk_generator.hh"
	#include "base/intmath.hh"
	#include "base/remote_gdb.hh"
	#include "base/socket.hh"
	#include "base/trace.hh"
	#include "cpu/static_inst.hh"
	#include "cpu/thread_context.hh"
	#include "cpu/thread_state.hh"
	#include "debug/GDBAcc.hh"
	#include "debug/GDBMisc.hh"
	#include "mem/page_table.hh"
	#include "mem/physical.hh"
	#include "mem/port.hh"
	#include "sim/full_system.hh"
	#include "sim/system.hh"

	using namespace std;
	using namespace ArmISA;

	RemoteGDB::RemoteGDB(System _system, ThreadContext tc)
	: BaseRemoteGDB(_system, tc), regCache32(this), regCache64(this)
	{
	}

	/*
	* Determine if the mapping at va..(va+len) is valid.
	*/
	bool
	RemoteGDB::acc(Addr va, size_t len)
	{
	if (FullSystem) {
	for (ChunkGenerator gen(va, len, PageBytes); !gen.done(); gen.next()) {
	if (!virtvalid(context, gen.addr())) {
	DPRINTF(GDBAcc, "acc: %#x mapping is invalid\n", va);
	return false;
	}
	}

	DPRINTF(GDBAcc, "acc: %#x mapping is valid\n", va);
	return true;
	} else {
	TlbEntry entry;
	//Check to make sure the first byte is mapped into the processes address
	//space.
	if (context->getProcessPtr()->pTable->lookup(va, entry))
	return true;
	return false;
	}
	}

	void
	RemoteGDB::AArch64GdbRegCache::getRegs(ThreadContext *context)
	{
	DPRINTF(GDBAcc, "getRegs in remotegdb \n");

	for (int i = 0; i < 31; ++i)
	r.x[i] = context->readIntReg(INTREG_X0 + i);
	r.spx = context->readIntReg(INTREG_SPX);
	r.pc = context->pcState().pc();
	r.cpsr = context->readMiscRegNoEffect(MISCREG_CPSR);

	for (int i = 0; i < 32*4; i += 4) {
	r.v[i + 0] = context->readFloatRegBits(i + 2);
	r.v[i + 1] = context->readFloatRegBits(i + 3);
	r.v[i + 2] = context->readFloatRegBits(i + 0);
	r.v[i + 3] = context->readFloatRegBits(i + 1);
	}

	for (int i = 0; i < 32; i ++) {
	r.vec[i] = context->readVecReg(RegId(VecRegClass,i));
	}
	}

	void
	RemoteGDB::AArch64GdbRegCache::setRegs(ThreadContext *context) const
	{
	DPRINTF(GDBAcc, "setRegs in remotegdb \n");

	for (int i = 0; i < 31; ++i)
	context->setIntReg(INTREG_X0 + i, r.x[i]);
	context->pcState(r.pc);
	context->setMiscRegNoEffect(MISCREG_CPSR, r.cpsr);
	// Update the stack pointer. This should be done after
	// updating CPSR/PSTATE since that might affect how SPX gets
	// mapped.
	context->setIntReg(INTREG_SPX, r.spx);

	for (int i = 0; i < 32*4; i += 4) {
	context->setFloatRegBits(i + 2, r.v[i + 0]);
	context->setFloatRegBits(i + 3, r.v[i + 1]);
	context->setFloatRegBits(i + 0, r.v[i + 2]);
	context->setFloatRegBits(i + 1, r.v[i + 3]);
	}

	for (int i = 0; i < 32; i ++) {
	context->setVecReg(RegId(VecRegClass, i), r.vec[i]);
	}
	}

	void
	RemoteGDB::AArch32GdbRegCache::getRegs(ThreadContext *context)
	{
	DPRINTF(GDBAcc, "getRegs in remotegdb \n");

	r.gpr[0] = context->readIntReg(INTREG_R0);
	r.gpr[1] = context->readIntReg(INTREG_R1);
	r.gpr[2] = context->readIntReg(INTREG_R2);
	r.gpr[3] = context->readIntReg(INTREG_R3);
	r.gpr[4] = context->readIntReg(INTREG_R4);
	r.gpr[5] = context->readIntReg(INTREG_R5);
	r.gpr[6] = context->readIntReg(INTREG_R6);
	r.gpr[7] = context->readIntReg(INTREG_R7);
	r.gpr[8] = context->readIntReg(INTREG_R8);
	r.gpr[9] = context->readIntReg(INTREG_R9);
	r.gpr[10] = context->readIntReg(INTREG_R10);
	r.gpr[11] = context->readIntReg(INTREG_R11);
	r.gpr[12] = context->readIntReg(INTREG_R12);
	r.gpr[13] = context->readIntReg(INTREG_SP);
	r.gpr[14] = context->readIntReg(INTREG_LR);
	r.gpr[15] = context->pcState().pc();

	// One day somebody will implement transfer of FPRs correctly.
	for (int i=0; i<8*3; i++) r.fpr[i] = 0;

	r.fpscr = context->readMiscRegNoEffect(MISCREG_FPSCR);
	r.cpsr = context->readMiscRegNoEffect(MISCREG_CPSR);
	}

	void
	RemoteGDB::AArch32GdbRegCache::setRegs(ThreadContext *context) const
	{
	DPRINTF(GDBAcc, "setRegs in remotegdb \n");

	context->setIntReg(INTREG_R0, r.gpr[0]);
	context->setIntReg(INTREG_R1, r.gpr[1]);
	context->setIntReg(INTREG_R2, r.gpr[2]);
	context->setIntReg(INTREG_R3, r.gpr[3]);
	context->setIntReg(INTREG_R4, r.gpr[4]);
	context->setIntReg(INTREG_R5, r.gpr[5]);
	context->setIntReg(INTREG_R6, r.gpr[6]);
	context->setIntReg(INTREG_R7, r.gpr[7]);
	context->setIntReg(INTREG_R8, r.gpr[8]);
	context->setIntReg(INTREG_R9, r.gpr[9]);
	context->setIntReg(INTREG_R10, r.gpr[10]);
	context->setIntReg(INTREG_R11, r.gpr[11]);
	context->setIntReg(INTREG_R12, r.gpr[12]);
	context->setIntReg(INTREG_SP, r.gpr[13]);
	context->setIntReg(INTREG_LR, r.gpr[14]);
	context->pcState(r.gpr[15]);

	// One day somebody will implement transfer of FPRs correctly.

	context->setMiscReg(MISCREG_FPSCR, r.fpscr);
	context->setMiscRegNoEffect(MISCREG_CPSR, r.cpsr);
	}

	RemoteGDB::BaseGdbRegCache*
	RemoteGDB::gdbRegs()
	{
	if (inAArch64(context))
	return &regCache64;
	else
	return &regCache32;
	}