remote_gdb.cc revision 12221
13536SN/A/*
211274Sshingarov@labware.com * Copyright 2015 LabWare
310595Sgabeblack@google.com * Copyright 2014 Google Inc.
412109SRekai.GonzalezAlberquilla@arm.com * Copyright (c) 2010, 2013, 2016 ARM Limited
57752SWilliam.Wang@arm.com * All rights reserved
67752SWilliam.Wang@arm.com *
77752SWilliam.Wang@arm.com * The license below extends only to copyright in the software and shall
87752SWilliam.Wang@arm.com * not be construed as granting a license to any other intellectual
97752SWilliam.Wang@arm.com * property including but not limited to intellectual property relating
107752SWilliam.Wang@arm.com * to a hardware implementation of the functionality of the software
117752SWilliam.Wang@arm.com * licensed hereunder.  You may use the software subject to the license
127752SWilliam.Wang@arm.com * terms below provided that you ensure that this notice is replicated
137752SWilliam.Wang@arm.com * unmodified and in its entirety in all distributions of the software,
147752SWilliam.Wang@arm.com * modified or unmodified, in source code or in binary form.
157752SWilliam.Wang@arm.com *
163536SN/A * Copyright (c) 2002-2005 The Regents of The University of Michigan
173536SN/A * All rights reserved.
183536SN/A *
193536SN/A * Redistribution and use in source and binary forms, with or without
203536SN/A * modification, are permitted provided that the following conditions are
213536SN/A * met: redistributions of source code must retain the above copyright
223536SN/A * notice, this list of conditions and the following disclaimer;
233536SN/A * redistributions in binary form must reproduce the above copyright
243536SN/A * notice, this list of conditions and the following disclaimer in the
253536SN/A * documentation and/or other materials provided with the distribution;
263536SN/A * neither the name of the copyright holders nor the names of its
273536SN/A * contributors may be used to endorse or promote products derived from
283536SN/A * this software without specific prior written permission.
293536SN/A *
303536SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
313536SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
323536SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
333536SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
343536SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
353536SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
363536SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
373536SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
383536SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
393536SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
403536SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
413536SN/A *
423536SN/A * Authors: Nathan Binkert
437752SWilliam.Wang@arm.com *          William Wang
4411274Sshingarov@labware.com *          Boris Shingarov
453536SN/A */
463536SN/A
473536SN/A/*
488332Snate@binkert.org * Copyright (c) 1990, 1993 The Regents of the University of California
498332Snate@binkert.org * All rights reserved
503536SN/A *
513536SN/A * This software was developed by the Computer Systems Engineering group
523536SN/A * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
533536SN/A * contributed to Berkeley.
543536SN/A *
553536SN/A * All advertising materials mentioning features or use of this software
563536SN/A * must display the following acknowledgement:
575543SN/A *      This product includes software developed by the University of
585543SN/A *      California, Lawrence Berkeley Laboratories.
593536SN/A *
603536SN/A * Redistribution and use in source and binary forms, with or without
613536SN/A * modification, are permitted provided that the following conditions
623536SN/A * are met:
633536SN/A * 1. Redistributions of source code must retain the above copyright
643536SN/A *    notice, this list of conditions and the following disclaimer.
653536SN/A * 2. Redistributions in binary form must reproduce the above copyright
663536SN/A *    notice, this list of conditions and the following disclaimer in the
673536SN/A *    documentation and/or other materials provided with the distribution.
683536SN/A * 3. All advertising materials mentioning features or use of this software
693536SN/A *    must display the following acknowledgement:
705543SN/A *      This product includes software developed by the University of
715543SN/A *      California, Berkeley and its contributors.
723536SN/A * 4. Neither the name of the University nor the names of its contributors
733536SN/A *    may be used to endorse or promote products derived from this software
743536SN/A *    without specific prior written permission.
753536SN/A *
763536SN/A * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
773536SN/A * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
783536SN/A * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
793536SN/A * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
803536SN/A * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
813536SN/A * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
823536SN/A * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
833536SN/A * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
843536SN/A * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
853536SN/A * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
863536SN/A * SUCH DAMAGE.
873536SN/A *
885543SN/A *      @(#)kgdb_stub.c 8.4 (Berkeley) 1/12/94
893536SN/A */
903536SN/A
913536SN/A/*-
923536SN/A * Copyright (c) 2001 The NetBSD Foundation, Inc.
933536SN/A * All rights reserved.
943536SN/A *
953536SN/A * This code is derived from software contributed to The NetBSD Foundation
963536SN/A * by Jason R. Thorpe.
973536SN/A *
983536SN/A * Redistribution and use in source and binary forms, with or without
993536SN/A * modification, are permitted provided that the following conditions
1003536SN/A * are met:
1013536SN/A * 1. Redistributions of source code must retain the above copyright
1023536SN/A *    notice, this list of conditions and the following disclaimer.
1033536SN/A * 2. Redistributions in binary form must reproduce the above copyright
1043536SN/A *    notice, this list of conditions and the following disclaimer in the
1053536SN/A *    documentation and/or other materials provided with the distribution.
1063536SN/A * 3. All advertising materials mentioning features or use of this software
1073536SN/A *    must display the following acknowledgement:
1085543SN/A *      This product includes software developed by the NetBSD
1095543SN/A *      Foundation, Inc. and its contributors.
1103536SN/A * 4. Neither the name of The NetBSD Foundation nor the names of its
1113536SN/A *    contributors may be used to endorse or promote products derived
1123536SN/A *    from this software without specific prior written permission.
1133536SN/A *
1143536SN/A * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
1153536SN/A * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
1163536SN/A * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
1173536SN/A * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
1183536SN/A * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
1193536SN/A * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
1203536SN/A * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
1213536SN/A * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
1223536SN/A * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
1233536SN/A * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
1243536SN/A * POSSIBILITY OF SUCH DAMAGE.
1253536SN/A */
1263536SN/A
1273536SN/A/*
1283536SN/A * $NetBSD: kgdb_stub.c,v 1.8 2001/07/07 22:58:00 wdk Exp $
1293536SN/A *
1303536SN/A * Taken from NetBSD
1313536SN/A *
1323536SN/A * "Stub" to allow remote cpu to debug over a serial line using gdb.
1333536SN/A */
1343536SN/A
13511793Sbrandon.potter@amd.com#include "arch/arm/remote_gdb.hh"
13611793Sbrandon.potter@amd.com
1373536SN/A#include <sys/signal.h>
1385569SN/A#include <unistd.h>
1393536SN/A
1403536SN/A#include <string>
1413536SN/A
1429020Sgblack@eecs.umich.edu#include "arch/arm/decoder.hh"
1438229Snate@binkert.org#include "arch/arm/pagetable.hh"
1448229Snate@binkert.org#include "arch/arm/registers.hh"
14510037SARM gem5 Developers#include "arch/arm/system.hh"
1467752SWilliam.Wang@arm.com#include "arch/arm/utility.hh"
1477752SWilliam.Wang@arm.com#include "arch/arm/vtophys.hh"
14810707SAndreas.Sandberg@ARM.com#include "base/chunk_generator.hh"
1493536SN/A#include "base/intmath.hh"
1503536SN/A#include "base/remote_gdb.hh"
1513536SN/A#include "base/socket.hh"
1523536SN/A#include "base/trace.hh"
1538229Snate@binkert.org#include "cpu/static_inst.hh"
1543536SN/A#include "cpu/thread_context.hh"
1557752SWilliam.Wang@arm.com#include "cpu/thread_state.hh"
1568232Snate@binkert.org#include "debug/GDBAcc.hh"
1578232Snate@binkert.org#include "debug/GDBMisc.hh"
1588229Snate@binkert.org#include "mem/page_table.hh"
1593536SN/A#include "mem/physical.hh"
1603536SN/A#include "mem/port.hh"
1618782Sgblack@eecs.umich.edu#include "sim/full_system.hh"
1623536SN/A#include "sim/system.hh"
1633536SN/A
1643536SN/Ausing namespace std;
1657752SWilliam.Wang@arm.comusing namespace ArmISA;
1663536SN/A
1675569SN/ARemoteGDB::RemoteGDB(System *_system, ThreadContext *tc)
16812031Sgabeblack@google.com    : BaseRemoteGDB(_system, tc), regCache32(this), regCache64(this)
1693536SN/A{
1703536SN/A}
1713536SN/A
1725569SN/A/*
1735569SN/A * Determine if the mapping at va..(va+len) is valid.
1745569SN/A */
1753536SN/Abool
1763536SN/ARemoteGDB::acc(Addr va, size_t len)
1773536SN/A{
1788782Sgblack@eecs.umich.edu    if (FullSystem) {
17910707SAndreas.Sandberg@ARM.com        for (ChunkGenerator gen(va, len, PageBytes); !gen.done(); gen.next()) {
18010707SAndreas.Sandberg@ARM.com            if (!virtvalid(context, gen.addr())) {
18110707SAndreas.Sandberg@ARM.com                DPRINTF(GDBAcc, "acc:   %#x mapping is invalid\n", va);
18210707SAndreas.Sandberg@ARM.com                return false;
1838782Sgblack@eecs.umich.edu            }
18410707SAndreas.Sandberg@ARM.com        }
1858782Sgblack@eecs.umich.edu
1868782Sgblack@eecs.umich.edu        DPRINTF(GDBAcc, "acc:   %#x mapping is valid\n", va);
1878782Sgblack@eecs.umich.edu        return true;
1888782Sgblack@eecs.umich.edu    } else {
1898782Sgblack@eecs.umich.edu        TlbEntry entry;
1908782Sgblack@eecs.umich.edu        //Check to make sure the first byte is mapped into the processes address
1918782Sgblack@eecs.umich.edu        //space.
1928782Sgblack@eecs.umich.edu        if (context->getProcessPtr()->pTable->lookup(va, entry))
1933536SN/A            return true;
1948782Sgblack@eecs.umich.edu        return false;
1958782Sgblack@eecs.umich.edu    }
1963536SN/A}
1973536SN/A
1983536SN/Avoid
19911274Sshingarov@labware.comRemoteGDB::AArch64GdbRegCache::getRegs(ThreadContext *context)
2003536SN/A{
20111274Sshingarov@labware.com    DPRINTF(GDBAcc, "getRegs in remotegdb \n");
2027752SWilliam.Wang@arm.com
20311274Sshingarov@labware.com    for (int i = 0; i < 31; ++i)
20411274Sshingarov@labware.com        r.x[i] = context->readIntReg(INTREG_X0 + i);
20511274Sshingarov@labware.com    r.spx = context->readIntReg(INTREG_SPX);
20611274Sshingarov@labware.com    r.pc = context->pcState().pc();
20711274Sshingarov@labware.com    r.cpsr = context->readMiscRegNoEffect(MISCREG_CPSR);
2083536SN/A
20911274Sshingarov@labware.com    for (int i = 0; i < 32*4; i += 4) {
21011274Sshingarov@labware.com        r.v[i + 0] = context->readFloatRegBits(i + 2);
21111274Sshingarov@labware.com        r.v[i + 1] = context->readFloatRegBits(i + 3);
21211274Sshingarov@labware.com        r.v[i + 2] = context->readFloatRegBits(i + 0);
21311274Sshingarov@labware.com        r.v[i + 3] = context->readFloatRegBits(i + 1);
2143536SN/A    }
21512109SRekai.GonzalezAlberquilla@arm.com
21612109SRekai.GonzalezAlberquilla@arm.com    for (int i = 0; i < 32; i ++) {
21712109SRekai.GonzalezAlberquilla@arm.com        r.vec[i] = context->readVecReg(RegId(VecRegClass,i));
21812109SRekai.GonzalezAlberquilla@arm.com    }
2193536SN/A}
2203536SN/A
2213536SN/Avoid
22211274Sshingarov@labware.comRemoteGDB::AArch64GdbRegCache::setRegs(ThreadContext *context) const
2233536SN/A{
22411274Sshingarov@labware.com    DPRINTF(GDBAcc, "setRegs in remotegdb \n");
2257752SWilliam.Wang@arm.com
22611274Sshingarov@labware.com    for (int i = 0; i < 31; ++i)
22711274Sshingarov@labware.com        context->setIntReg(INTREG_X0 + i, r.x[i]);
22811274Sshingarov@labware.com    context->pcState(r.pc);
22911274Sshingarov@labware.com    context->setMiscRegNoEffect(MISCREG_CPSR, r.cpsr);
23011274Sshingarov@labware.com    // Update the stack pointer. This should be done after
23111274Sshingarov@labware.com    // updating CPSR/PSTATE since that might affect how SPX gets
23211274Sshingarov@labware.com    // mapped.
23311274Sshingarov@labware.com    context->setIntReg(INTREG_SPX, r.spx);
2347752SWilliam.Wang@arm.com
23511274Sshingarov@labware.com    for (int i = 0; i < 32*4; i += 4) {
23611274Sshingarov@labware.com        context->setFloatRegBits(i + 2, r.v[i + 0]);
23711274Sshingarov@labware.com        context->setFloatRegBits(i + 3, r.v[i + 1]);
23811274Sshingarov@labware.com        context->setFloatRegBits(i + 0, r.v[i + 2]);
23911274Sshingarov@labware.com        context->setFloatRegBits(i + 1, r.v[i + 3]);
2403536SN/A    }
24112109SRekai.GonzalezAlberquilla@arm.com
24212109SRekai.GonzalezAlberquilla@arm.com    for (int i = 0; i < 32; i ++) {
24312109SRekai.GonzalezAlberquilla@arm.com        context->setVecReg(RegId(VecRegClass, i), r.vec[i]);
24412109SRekai.GonzalezAlberquilla@arm.com    }
2453536SN/A}
2463536SN/A
24711274Sshingarov@labware.comvoid
24811274Sshingarov@labware.comRemoteGDB::AArch32GdbRegCache::getRegs(ThreadContext *context)
2493536SN/A{
25011274Sshingarov@labware.com    DPRINTF(GDBAcc, "getRegs in remotegdb \n");
25111274Sshingarov@labware.com
25211274Sshingarov@labware.com    r.gpr[0] = context->readIntReg(INTREG_R0);
25311274Sshingarov@labware.com    r.gpr[1] = context->readIntReg(INTREG_R1);
25411274Sshingarov@labware.com    r.gpr[2] = context->readIntReg(INTREG_R2);
25511274Sshingarov@labware.com    r.gpr[3] = context->readIntReg(INTREG_R3);
25611274Sshingarov@labware.com    r.gpr[4] = context->readIntReg(INTREG_R4);
25711274Sshingarov@labware.com    r.gpr[5] = context->readIntReg(INTREG_R5);
25811274Sshingarov@labware.com    r.gpr[6] = context->readIntReg(INTREG_R6);
25911274Sshingarov@labware.com    r.gpr[7] = context->readIntReg(INTREG_R7);
26011274Sshingarov@labware.com    r.gpr[8] = context->readIntReg(INTREG_R8);
26111274Sshingarov@labware.com    r.gpr[9] = context->readIntReg(INTREG_R9);
26211274Sshingarov@labware.com    r.gpr[10] = context->readIntReg(INTREG_R10);
26311274Sshingarov@labware.com    r.gpr[11] = context->readIntReg(INTREG_R11);
26411274Sshingarov@labware.com    r.gpr[12] = context->readIntReg(INTREG_R12);
26511274Sshingarov@labware.com    r.gpr[13] = context->readIntReg(INTREG_SP);
26611274Sshingarov@labware.com    r.gpr[14] = context->readIntReg(INTREG_LR);
26711274Sshingarov@labware.com    r.gpr[15] = context->pcState().pc();
26811274Sshingarov@labware.com
26911274Sshingarov@labware.com    // One day somebody will implement transfer of FPRs correctly.
27011274Sshingarov@labware.com    for (int i=0; i<8*3; i++) r.fpr[i] = 0;
27111274Sshingarov@labware.com
27211274Sshingarov@labware.com    r.fpscr = context->readMiscRegNoEffect(MISCREG_FPSCR);
27311274Sshingarov@labware.com    r.cpsr = context->readMiscRegNoEffect(MISCREG_CPSR);
2743536SN/A}
2753536SN/A
27611274Sshingarov@labware.comvoid
27711274Sshingarov@labware.comRemoteGDB::AArch32GdbRegCache::setRegs(ThreadContext *context) const
27811274Sshingarov@labware.com{
27911274Sshingarov@labware.com    DPRINTF(GDBAcc, "setRegs in remotegdb \n");
28011274Sshingarov@labware.com
28111274Sshingarov@labware.com    context->setIntReg(INTREG_R0, r.gpr[0]);
28211274Sshingarov@labware.com    context->setIntReg(INTREG_R1, r.gpr[1]);
28311274Sshingarov@labware.com    context->setIntReg(INTREG_R2, r.gpr[2]);
28411274Sshingarov@labware.com    context->setIntReg(INTREG_R3, r.gpr[3]);
28511274Sshingarov@labware.com    context->setIntReg(INTREG_R4, r.gpr[4]);
28611274Sshingarov@labware.com    context->setIntReg(INTREG_R5, r.gpr[5]);
28711274Sshingarov@labware.com    context->setIntReg(INTREG_R6, r.gpr[6]);
28811274Sshingarov@labware.com    context->setIntReg(INTREG_R7, r.gpr[7]);
28911274Sshingarov@labware.com    context->setIntReg(INTREG_R8, r.gpr[8]);
29011274Sshingarov@labware.com    context->setIntReg(INTREG_R9, r.gpr[9]);
29111274Sshingarov@labware.com    context->setIntReg(INTREG_R10, r.gpr[10]);
29211274Sshingarov@labware.com    context->setIntReg(INTREG_R11, r.gpr[11]);
29311274Sshingarov@labware.com    context->setIntReg(INTREG_R12, r.gpr[12]);
29411274Sshingarov@labware.com    context->setIntReg(INTREG_SP, r.gpr[13]);
29511274Sshingarov@labware.com    context->setIntReg(INTREG_LR, r.gpr[14]);
29611274Sshingarov@labware.com    context->pcState(r.gpr[15]);
29711274Sshingarov@labware.com
29811274Sshingarov@labware.com    // One day somebody will implement transfer of FPRs correctly.
29911274Sshingarov@labware.com
30011274Sshingarov@labware.com    context->setMiscReg(MISCREG_FPSCR, r.fpscr);
30111274Sshingarov@labware.com    context->setMiscRegNoEffect(MISCREG_CPSR, r.cpsr);
30211274Sshingarov@labware.com}
30311274Sshingarov@labware.com
30411274Sshingarov@labware.comRemoteGDB::BaseGdbRegCache*
30511274Sshingarov@labware.comRemoteGDB::gdbRegs()
30611274Sshingarov@labware.com{
30711274Sshingarov@labware.com    if (inAArch64(context))
30812221Sshingarov@gmail.com        return &regCache64;
30912221Sshingarov@gmail.com    else
31012031Sgabeblack@google.com        return &regCache32;
31111274Sshingarov@labware.com}
312