src/arch/mips/remote_gdb.cc - public/gem5 - Git at Google

 /*
  * Copyright 2015-2020 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.
  */

 /*
  * 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 "blobs/gdb_xml_mips.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->readFloatReg(i);
     r.fsr = context->readFloatReg(FLOATREG_FCCR);
     r.fir = context->readFloatReg(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->setFloatReg(i, r.fpr[i]);
     context->setFloatReg(FLOATREG_FCCR, r.fsr);
     context->setFloatReg(FLOATREG_FIR, r.fir);
 }

 BaseGdbRegCache*
 RemoteGDB::gdbRegs()
 {
     return &regCache;
 }

 bool
 RemoteGDB::getXferFeaturesRead(const std::string &annex, std::string &output)
 {
 #define GDB_XML(x, s) \
         { x, std::string(reinterpret_cast<const char *>(Blobs::s), \
         Blobs::s ## _len) }
     static const std::map<std::string, std::string> annexMap {
         GDB_XML("target.xml", gdb_xml_mips),
     };
 #undef GDB_XML
     auto it = annexMap.find(annex);
     if (it == annexMap.end())
         return false;
     output = it->second;
     return true;
 }
	/*
	* Copyright 2015-2020 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.
	*/

	/*
	* 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 "blobs/gdb_xml_mips.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->readFloatReg(i);
	r.fsr = context->readFloatReg(FLOATREG_FCCR);
	r.fir = context->readFloatReg(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->setFloatReg(i, r.fpr[i]);
	context->setFloatReg(FLOATREG_FCCR, r.fsr);
	context->setFloatReg(FLOATREG_FIR, r.fir);
	}

	BaseGdbRegCache*
	RemoteGDB::gdbRegs()
	{
	return &regCache;
	}

	bool
	RemoteGDB::getXferFeaturesRead(const std::string &annex, std::string &output)
	{
	#define GDB_XML(x, s) \
	{ x, std::string(reinterpret_cast<const char *>(Blobs::s), \
	Blobs::s ## _len) }
	static const std::map<std::string, std::string> annexMap {
	GDB_XML("target.xml", gdb_xml_mips),
	};
	#undef GDB_XML
	auto it = annexMap.find(annex);
	if (it == annexMap.end())
	return false;
	output = it->second;
	return true;
	}