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

 /*
  * 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
  */

 /*
  * 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 <sys/signal.h>

 #include <string>
 #include <unistd.h>

 #include "arch/vtophys.hh"
 #include "arch/sparc/remote_gdb.hh"
 #include "base/intmath.hh"
 #include "base/remote_gdb.hh"
 #include "base/socket.hh"
 #include "base/trace.hh"
 #include "config/full_system.hh"
 #include "cpu/thread_context.hh"
 #include "cpu/static_inst.hh"
 #include "mem/page_table.hh"
 #include "mem/physical.hh"
 #include "mem/port.hh"
 #include "sim/byteswap.hh"
 #include "sim/process.hh"
 #include "sim/system.hh"

 using namespace std;
 using namespace SparcISA;

 RemoteGDB::RemoteGDB(System *_system, ThreadContext *c)
     : BaseRemoteGDB(_system, c, NumGDBRegs), nextBkpt(0)
 {}

 ///////////////////////////////////////////////////////////
 // RemoteGDB::acc
 //
 //      Determine if the mapping at va..(va+len) is valid.
 //
 bool
 RemoteGDB::acc(Addr va, size_t len)
 {
     //@Todo In NetBSD, this function checks if all addresses
     //from va to va + len have valid page map entries. Not
     //sure how this will work for other OSes or in general.
 #if FULL_SYSTEM
     if (va)
         return true;
     return false;
 #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;
 #endif
 }

 ///////////////////////////////////////////////////////////
 // RemoteGDB::getregs
 //
 //      Translate the kernel debugger register format into
 //      the GDB register format.
 void
 RemoteGDB::getregs()
 {
     memset(gdbregs.regs, 0, gdbregs.size);

     PCState pc = context->pcState();

     if (context->readMiscReg(MISCREG_PSTATE) &
            PSTATE::am) {
         uint32_t *regs;
         regs = (uint32_t*)gdbregs.regs;
         regs[Reg32Pc] = htobe((uint32_t)pc.pc());
         regs[Reg32Npc] = htobe((uint32_t)pc.npc());
         for(int x = RegG0; x <= RegI0 + 7; x++)
             regs[x] = htobe((uint32_t)context->readIntReg(x - RegG0));

         regs[Reg32Y] = htobe((uint32_t)context->readIntReg(NumIntArchRegs + 1));
         regs[Reg32Psr] = htobe((uint32_t)context->readMiscReg(MISCREG_PSTATE));
         regs[Reg32Fsr] = htobe((uint32_t)context->readMiscReg(MISCREG_FSR));
         regs[Reg32Csr] = htobe((uint32_t)context->readIntReg(NumIntArchRegs + 2));
     } else {
         gdbregs.regs[RegPc] = htobe(pc.pc());
         gdbregs.regs[RegNpc] = htobe(pc.npc());
         for(int x = RegG0; x <= RegI0 + 7; x++)
             gdbregs.regs[x] = htobe(context->readIntReg(x - RegG0));

         gdbregs.regs[RegFsr] = htobe(context->readMiscReg(MISCREG_FSR));
         gdbregs.regs[RegFprs] = htobe(context->readMiscReg(MISCREG_FPRS));
         gdbregs.regs[RegY] = htobe(context->readIntReg(NumIntArchRegs + 1));
         gdbregs.regs[RegState] = htobe(
             context->readMiscReg(MISCREG_CWP) |
             context->readMiscReg(MISCREG_PSTATE) << 8 |
             context->readMiscReg(MISCREG_ASI) << 24 |
             context->readIntReg(NumIntArchRegs + 2) << 32);
     }

     DPRINTF(GDBRead, "PC=%#x\n", gdbregs.regs[RegPc]);

     //Floating point registers are left at 0 in netbsd
     //All registers other than the pc, npc and int regs
     //are ignored as well.
 }

 ///////////////////////////////////////////////////////////
 // RemoteGDB::setregs
 //
 //      Translate the GDB register format into the kernel
 //      debugger register format.
 //
 void
 RemoteGDB::setregs()
 {
     PCState pc;
     pc.pc(gdbregs.regs[RegPc]);
     pc.npc(gdbregs.regs[RegNpc]);
     pc.nnpc(pc.npc() + sizeof(MachInst));
     pc.upc(0);
     pc.nupc(1);
     context->pcState(pc);
     for(int x = RegG0; x <= RegI0 + 7; x++)
         context->setIntReg(x - RegG0, gdbregs.regs[x]);
     //Only the integer registers, pc and npc are set in netbsd
 }

 void
 RemoteGDB::clearSingleStep()
 {
    if (nextBkpt)
        clearTempBreakpoint(nextBkpt);
 }

 void
 RemoteGDB::setSingleStep()
 {
     nextBkpt = context->pcState().npc();
     setTempBreakpoint(nextBkpt);
 }
	/*
	* 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
	*/

	/*
	* 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 <sys/signal.h>

	#include <string>
	#include <unistd.h>

	#include "arch/vtophys.hh"
	#include "arch/sparc/remote_gdb.hh"
	#include "base/intmath.hh"
	#include "base/remote_gdb.hh"
	#include "base/socket.hh"
	#include "base/trace.hh"
	#include "config/full_system.hh"
	#include "cpu/thread_context.hh"
	#include "cpu/static_inst.hh"
	#include "mem/page_table.hh"
	#include "mem/physical.hh"
	#include "mem/port.hh"
	#include "sim/byteswap.hh"
	#include "sim/process.hh"
	#include "sim/system.hh"

	using namespace std;
	using namespace SparcISA;

	RemoteGDB::RemoteGDB(System _system, ThreadContext c)
	: BaseRemoteGDB(_system, c, NumGDBRegs), nextBkpt(0)
	{}

	///////////////////////////////////////////////////////////
	// RemoteGDB::acc
	//
	// Determine if the mapping at va..(va+len) is valid.
	//
	bool
	RemoteGDB::acc(Addr va, size_t len)
	{
	//@Todo In NetBSD, this function checks if all addresses
	//from va to va + len have valid page map entries. Not
	//sure how this will work for other OSes or in general.
	#if FULL_SYSTEM
	if (va)
	return true;
	return false;
	#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;
	#endif
	}

	///////////////////////////////////////////////////////////
	// RemoteGDB::getregs
	//
	// Translate the kernel debugger register format into
	// the GDB register format.
	void
	RemoteGDB::getregs()
	{
	memset(gdbregs.regs, 0, gdbregs.size);

	PCState pc = context->pcState();

	if (context->readMiscReg(MISCREG_PSTATE) &
	PSTATE::am) {
	uint32_t *regs;
	regs = (uint32_t*)gdbregs.regs;
	regs[Reg32Pc] = htobe((uint32_t)pc.pc());
	regs[Reg32Npc] = htobe((uint32_t)pc.npc());
	for(int x = RegG0; x <= RegI0 + 7; x++)
	regs[x] = htobe((uint32_t)context->readIntReg(x - RegG0));

	regs[Reg32Y] = htobe((uint32_t)context->readIntReg(NumIntArchRegs + 1));
	regs[Reg32Psr] = htobe((uint32_t)context->readMiscReg(MISCREG_PSTATE));
	regs[Reg32Fsr] = htobe((uint32_t)context->readMiscReg(MISCREG_FSR));
	regs[Reg32Csr] = htobe((uint32_t)context->readIntReg(NumIntArchRegs + 2));
	} else {
	gdbregs.regs[RegPc] = htobe(pc.pc());
	gdbregs.regs[RegNpc] = htobe(pc.npc());
	for(int x = RegG0; x <= RegI0 + 7; x++)
	gdbregs.regs[x] = htobe(context->readIntReg(x - RegG0));

	gdbregs.regs[RegFsr] = htobe(context->readMiscReg(MISCREG_FSR));
	gdbregs.regs[RegFprs] = htobe(context->readMiscReg(MISCREG_FPRS));
	gdbregs.regs[RegY] = htobe(context->readIntReg(NumIntArchRegs + 1));
	gdbregs.regs[RegState] = htobe(
	context->readMiscReg(MISCREG_CWP) \|
	context->readMiscReg(MISCREG_PSTATE) << 8 \|
	context->readMiscReg(MISCREG_ASI) << 24 \|
	context->readIntReg(NumIntArchRegs + 2) << 32);
	}

	DPRINTF(GDBRead, "PC=%#x\n", gdbregs.regs[RegPc]);

	//Floating point registers are left at 0 in netbsd
	//All registers other than the pc, npc and int regs
	//are ignored as well.
	}

	///////////////////////////////////////////////////////////
	// RemoteGDB::setregs
	//
	// Translate the GDB register format into the kernel
	// debugger register format.
	//
	void
	RemoteGDB::setregs()
	{
	PCState pc;
	pc.pc(gdbregs.regs[RegPc]);
	pc.npc(gdbregs.regs[RegNpc]);
	pc.nnpc(pc.npc() + sizeof(MachInst));
	pc.upc(0);
	pc.nupc(1);
	context->pcState(pc);
	for(int x = RegG0; x <= RegI0 + 7; x++)
	context->setIntReg(x - RegG0, gdbregs.regs[x]);
	//Only the integer registers, pc and npc are set in netbsd
	}

	void
	RemoteGDB::clearSingleStep()
	{
	if (nextBkpt)
	clearTempBreakpoint(nextBkpt);
	}

	void
	RemoteGDB::setSingleStep()
	{
	nextBkpt = context->pcState().npc();
	setTempBreakpoint(nextBkpt);
	}