remote_gdb.cc revision 10595
13536Sgblack@eecs.umich.edu/*
210595Sgabeblack@google.com * Copyright 2014 Google, Inc.
33536Sgblack@eecs.umich.edu * Copyright (c) 2002-2005 The Regents of The University of Michigan
43536Sgblack@eecs.umich.edu * All rights reserved.
53536Sgblack@eecs.umich.edu *
63536Sgblack@eecs.umich.edu * Redistribution and use in source and binary forms, with or without
73536Sgblack@eecs.umich.edu * modification, are permitted provided that the following conditions are
83536Sgblack@eecs.umich.edu * met: redistributions of source code must retain the above copyright
93536Sgblack@eecs.umich.edu * notice, this list of conditions and the following disclaimer;
103536Sgblack@eecs.umich.edu * redistributions in binary form must reproduce the above copyright
113536Sgblack@eecs.umich.edu * notice, this list of conditions and the following disclaimer in the
123536Sgblack@eecs.umich.edu * documentation and/or other materials provided with the distribution;
133536Sgblack@eecs.umich.edu * neither the name of the copyright holders nor the names of its
143536Sgblack@eecs.umich.edu * contributors may be used to endorse or promote products derived from
153536Sgblack@eecs.umich.edu * this software without specific prior written permission.
163536Sgblack@eecs.umich.edu *
173536Sgblack@eecs.umich.edu * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
183536Sgblack@eecs.umich.edu * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
193536Sgblack@eecs.umich.edu * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
203536Sgblack@eecs.umich.edu * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
213536Sgblack@eecs.umich.edu * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
223536Sgblack@eecs.umich.edu * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
233536Sgblack@eecs.umich.edu * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
243536Sgblack@eecs.umich.edu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
253536Sgblack@eecs.umich.edu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
263536Sgblack@eecs.umich.edu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
273536Sgblack@eecs.umich.edu * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
283536Sgblack@eecs.umich.edu *
293536Sgblack@eecs.umich.edu * Authors: Nathan Binkert
303536Sgblack@eecs.umich.edu */
313536Sgblack@eecs.umich.edu
323536Sgblack@eecs.umich.edu/*
338332Snate@binkert.org * Copyright (c) 1990, 1993 The Regents of the University of California
348332Snate@binkert.org * All rights reserved
353536Sgblack@eecs.umich.edu *
363536Sgblack@eecs.umich.edu * This software was developed by the Computer Systems Engineering group
373536Sgblack@eecs.umich.edu * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
383536Sgblack@eecs.umich.edu * contributed to Berkeley.
393536Sgblack@eecs.umich.edu *
403536Sgblack@eecs.umich.edu * All advertising materials mentioning features or use of this software
413536Sgblack@eecs.umich.edu * must display the following acknowledgement:
425543Ssaidi@eecs.umich.edu *      This product includes software developed by the University of
435543Ssaidi@eecs.umich.edu *      California, Lawrence Berkeley Laboratories.
443536Sgblack@eecs.umich.edu *
453536Sgblack@eecs.umich.edu * Redistribution and use in source and binary forms, with or without
463536Sgblack@eecs.umich.edu * modification, are permitted provided that the following conditions
473536Sgblack@eecs.umich.edu * are met:
483536Sgblack@eecs.umich.edu * 1. Redistributions of source code must retain the above copyright
493536Sgblack@eecs.umich.edu *    notice, this list of conditions and the following disclaimer.
503536Sgblack@eecs.umich.edu * 2. Redistributions in binary form must reproduce the above copyright
513536Sgblack@eecs.umich.edu *    notice, this list of conditions and the following disclaimer in the
523536Sgblack@eecs.umich.edu *    documentation and/or other materials provided with the distribution.
533536Sgblack@eecs.umich.edu * 3. All advertising materials mentioning features or use of this software
543536Sgblack@eecs.umich.edu *    must display the following acknowledgement:
555543Ssaidi@eecs.umich.edu *      This product includes software developed by the University of
565543Ssaidi@eecs.umich.edu *      California, Berkeley and its contributors.
573536Sgblack@eecs.umich.edu * 4. Neither the name of the University nor the names of its contributors
583536Sgblack@eecs.umich.edu *    may be used to endorse or promote products derived from this software
593536Sgblack@eecs.umich.edu *    without specific prior written permission.
603536Sgblack@eecs.umich.edu *
613536Sgblack@eecs.umich.edu * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
623536Sgblack@eecs.umich.edu * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
633536Sgblack@eecs.umich.edu * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
643536Sgblack@eecs.umich.edu * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
653536Sgblack@eecs.umich.edu * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
663536Sgblack@eecs.umich.edu * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
673536Sgblack@eecs.umich.edu * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
683536Sgblack@eecs.umich.edu * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
693536Sgblack@eecs.umich.edu * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
703536Sgblack@eecs.umich.edu * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
713536Sgblack@eecs.umich.edu * SUCH DAMAGE.
723536Sgblack@eecs.umich.edu *
735543Ssaidi@eecs.umich.edu *      @(#)kgdb_stub.c 8.4 (Berkeley) 1/12/94
743536Sgblack@eecs.umich.edu */
753536Sgblack@eecs.umich.edu
763536Sgblack@eecs.umich.edu/*-
773536Sgblack@eecs.umich.edu * Copyright (c) 2001 The NetBSD Foundation, Inc.
783536Sgblack@eecs.umich.edu * All rights reserved.
793536Sgblack@eecs.umich.edu *
803536Sgblack@eecs.umich.edu * This code is derived from software contributed to The NetBSD Foundation
813536Sgblack@eecs.umich.edu * by Jason R. Thorpe.
823536Sgblack@eecs.umich.edu *
833536Sgblack@eecs.umich.edu * Redistribution and use in source and binary forms, with or without
843536Sgblack@eecs.umich.edu * modification, are permitted provided that the following conditions
853536Sgblack@eecs.umich.edu * are met:
863536Sgblack@eecs.umich.edu * 1. Redistributions of source code must retain the above copyright
873536Sgblack@eecs.umich.edu *    notice, this list of conditions and the following disclaimer.
883536Sgblack@eecs.umich.edu * 2. Redistributions in binary form must reproduce the above copyright
893536Sgblack@eecs.umich.edu *    notice, this list of conditions and the following disclaimer in the
903536Sgblack@eecs.umich.edu *    documentation and/or other materials provided with the distribution.
913536Sgblack@eecs.umich.edu * 3. All advertising materials mentioning features or use of this software
923536Sgblack@eecs.umich.edu *    must display the following acknowledgement:
935543Ssaidi@eecs.umich.edu *      This product includes software developed by the NetBSD
945543Ssaidi@eecs.umich.edu *      Foundation, Inc. and its contributors.
953536Sgblack@eecs.umich.edu * 4. Neither the name of The NetBSD Foundation nor the names of its
963536Sgblack@eecs.umich.edu *    contributors may be used to endorse or promote products derived
973536Sgblack@eecs.umich.edu *    from this software without specific prior written permission.
983536Sgblack@eecs.umich.edu *
993536Sgblack@eecs.umich.edu * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
1003536Sgblack@eecs.umich.edu * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
1013536Sgblack@eecs.umich.edu * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
1023536Sgblack@eecs.umich.edu * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
1033536Sgblack@eecs.umich.edu * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
1043536Sgblack@eecs.umich.edu * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
1053536Sgblack@eecs.umich.edu * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
1063536Sgblack@eecs.umich.edu * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
1073536Sgblack@eecs.umich.edu * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
1083536Sgblack@eecs.umich.edu * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
1093536Sgblack@eecs.umich.edu * POSSIBILITY OF SUCH DAMAGE.
1103536Sgblack@eecs.umich.edu */
1113536Sgblack@eecs.umich.edu
1123536Sgblack@eecs.umich.edu/*
1133536Sgblack@eecs.umich.edu * $NetBSD: kgdb_stub.c,v 1.8 2001/07/07 22:58:00 wdk Exp $
1143536Sgblack@eecs.umich.edu *
1153536Sgblack@eecs.umich.edu * Taken from NetBSD
1163536Sgblack@eecs.umich.edu *
1173536Sgblack@eecs.umich.edu * "Stub" to allow remote cpu to debug over a serial line using gdb.
1183536Sgblack@eecs.umich.edu */
1193536Sgblack@eecs.umich.edu
1209202Spalle@lyckegaard.dk#include <signal.h>
1213536Sgblack@eecs.umich.edu#include <sys/signal.h>
1228229Snate@binkert.org#include <unistd.h>
1233536Sgblack@eecs.umich.edu
1243536Sgblack@eecs.umich.edu#include <string>
1253536Sgblack@eecs.umich.edu
1268229Snate@binkert.org#include "arch/sparc/remote_gdb.hh"
1273536Sgblack@eecs.umich.edu#include "arch/vtophys.hh"
1283536Sgblack@eecs.umich.edu#include "base/intmath.hh"
1293536Sgblack@eecs.umich.edu#include "base/remote_gdb.hh"
1303536Sgblack@eecs.umich.edu#include "base/socket.hh"
1313536Sgblack@eecs.umich.edu#include "base/trace.hh"
1328229Snate@binkert.org#include "cpu/static_inst.hh"
1333536Sgblack@eecs.umich.edu#include "cpu/thread_context.hh"
1348232Snate@binkert.org#include "debug/GDBRead.hh"
1355107Sgblack@eecs.umich.edu#include "mem/page_table.hh"
1363536Sgblack@eecs.umich.edu#include "mem/physical.hh"
1373536Sgblack@eecs.umich.edu#include "mem/port.hh"
1387678Sgblack@eecs.umich.edu#include "sim/byteswap.hh"
1398767Sgblack@eecs.umich.edu#include "sim/full_system.hh"
1405107Sgblack@eecs.umich.edu#include "sim/process.hh"
1413536Sgblack@eecs.umich.edu#include "sim/system.hh"
1423536Sgblack@eecs.umich.edu
1433536Sgblack@eecs.umich.eduusing namespace std;
1445567Snate@binkert.orgusing namespace SparcISA;
1453536Sgblack@eecs.umich.edu
1463550Sgblack@eecs.umich.eduRemoteGDB::RemoteGDB(System *_system, ThreadContext *c)
14710595Sgabeblack@google.com    : BaseRemoteGDB(_system, c, NumGDBRegs * sizeof(uint64_t)), nextBkpt(0)
1483536Sgblack@eecs.umich.edu{}
1493536Sgblack@eecs.umich.edu
1503536Sgblack@eecs.umich.edu///////////////////////////////////////////////////////////
1513536Sgblack@eecs.umich.edu// RemoteGDB::acc
1523536Sgblack@eecs.umich.edu//
1535543Ssaidi@eecs.umich.edu//      Determine if the mapping at va..(va+len) is valid.
1543536Sgblack@eecs.umich.edu//
1553536Sgblack@eecs.umich.edubool
1563536Sgblack@eecs.umich.eduRemoteGDB::acc(Addr va, size_t len)
1573536Sgblack@eecs.umich.edu{
1583571Sgblack@eecs.umich.edu    //@Todo In NetBSD, this function checks if all addresses
1597741Sgblack@eecs.umich.edu    // from va to va + len have valid page map entries. Not
1607741Sgblack@eecs.umich.edu    // sure how this will work for other OSes or in general.
1618767Sgblack@eecs.umich.edu    if (FullSystem) {
1628767Sgblack@eecs.umich.edu        if (va)
1638767Sgblack@eecs.umich.edu            return true;
1648767Sgblack@eecs.umich.edu        return false;
1658767Sgblack@eecs.umich.edu    } else {
1668767Sgblack@eecs.umich.edu        TlbEntry entry;
1678767Sgblack@eecs.umich.edu        // Check to make sure the first byte is mapped into the processes
1688767Sgblack@eecs.umich.edu        // address space.
1698767Sgblack@eecs.umich.edu        if (context->getProcessPtr()->pTable->lookup(va, entry))
1708767Sgblack@eecs.umich.edu            return true;
1718767Sgblack@eecs.umich.edu        return false;
1728767Sgblack@eecs.umich.edu    }
1733536Sgblack@eecs.umich.edu}
1743536Sgblack@eecs.umich.edu
1753536Sgblack@eecs.umich.edu///////////////////////////////////////////////////////////
1763536Sgblack@eecs.umich.edu// RemoteGDB::getregs
1773536Sgblack@eecs.umich.edu//
1785543Ssaidi@eecs.umich.edu//      Translate the kernel debugger register format into
1795543Ssaidi@eecs.umich.edu//      the GDB register format.
1803536Sgblack@eecs.umich.eduvoid
1813536Sgblack@eecs.umich.eduRemoteGDB::getregs()
1823536Sgblack@eecs.umich.edu{
1833536Sgblack@eecs.umich.edu    memset(gdbregs.regs, 0, gdbregs.size);
1843536Sgblack@eecs.umich.edu
1857720Sgblack@eecs.umich.edu    PCState pc = context->pcState();
1868829Sgblack@eecs.umich.edu    PSTATE pstate = context->readMiscReg(MISCREG_PSTATE);
1877720Sgblack@eecs.umich.edu
1888829Sgblack@eecs.umich.edu    if (pstate.am) {
18910595Sgabeblack@google.com        gdbregs.regs32[Reg32Pc] = htobe((uint32_t)pc.pc());
19010595Sgabeblack@google.com        gdbregs.regs32[Reg32Npc] = htobe((uint32_t)pc.npc());
1917741Sgblack@eecs.umich.edu        for (int x = RegG0; x <= RegI0 + 7; x++)
19210595Sgabeblack@google.com            gdbregs.regs32[x] = htobe((uint32_t)context->readIntReg(x - RegG0));
1934060Ssaidi@eecs.umich.edu
19410595Sgabeblack@google.com        gdbregs.regs32[Reg32Y] =
19510595Sgabeblack@google.com            htobe((uint32_t)context->readIntReg(NumIntArchRegs + 1));
19610595Sgabeblack@google.com        gdbregs.regs32[Reg32Psr] = htobe((uint32_t)pstate);
19710595Sgabeblack@google.com        gdbregs.regs32[Reg32Fsr] =
19810595Sgabeblack@google.com            htobe((uint32_t)context->readMiscReg(MISCREG_FSR));
19910595Sgabeblack@google.com        gdbregs.regs32[Reg32Csr] =
20010595Sgabeblack@google.com            htobe((uint32_t)context->readIntReg(NumIntArchRegs + 2));
2014070Ssaidi@eecs.umich.edu    } else {
20210595Sgabeblack@google.com        gdbregs.regs64[RegPc] = htobe(pc.pc());
20310595Sgabeblack@google.com        gdbregs.regs64[RegNpc] = htobe(pc.npc());
2047741Sgblack@eecs.umich.edu        for (int x = RegG0; x <= RegI0 + 7; x++)
20510595Sgabeblack@google.com            gdbregs.regs64[x] = htobe(context->readIntReg(x - RegG0));
2064060Ssaidi@eecs.umich.edu
20710595Sgabeblack@google.com        gdbregs.regs64[RegFsr] = htobe(context->readMiscReg(MISCREG_FSR));
20810595Sgabeblack@google.com        gdbregs.regs64[RegFprs] = htobe(context->readMiscReg(MISCREG_FPRS));
20910595Sgabeblack@google.com        gdbregs.regs64[RegY] = htobe(context->readIntReg(NumIntArchRegs + 1));
21010595Sgabeblack@google.com        gdbregs.regs64[RegState] = htobe(
2114172Ssaidi@eecs.umich.edu            context->readMiscReg(MISCREG_CWP) |
2128829Sgblack@eecs.umich.edu            pstate << 8 |
2134172Ssaidi@eecs.umich.edu            context->readMiscReg(MISCREG_ASI) << 24 |
2144070Ssaidi@eecs.umich.edu            context->readIntReg(NumIntArchRegs + 2) << 32);
2154070Ssaidi@eecs.umich.edu    }
2164060Ssaidi@eecs.umich.edu
21710595Sgabeblack@google.com    DPRINTF(GDBRead, "PC=%#x\n", gdbregs.regs64[RegPc]);
2184060Ssaidi@eecs.umich.edu
2197741Sgblack@eecs.umich.edu    // Floating point registers are left at 0 in netbsd
2207741Sgblack@eecs.umich.edu    // All registers other than the pc, npc and int regs
2217741Sgblack@eecs.umich.edu    // are ignored as well.
2223536Sgblack@eecs.umich.edu}
2233536Sgblack@eecs.umich.edu
2243536Sgblack@eecs.umich.edu///////////////////////////////////////////////////////////
2253536Sgblack@eecs.umich.edu// RemoteGDB::setregs
2263536Sgblack@eecs.umich.edu//
2275543Ssaidi@eecs.umich.edu//      Translate the GDB register format into the kernel
2285543Ssaidi@eecs.umich.edu//      debugger register format.
2293536Sgblack@eecs.umich.edu//
2303536Sgblack@eecs.umich.eduvoid
2313536Sgblack@eecs.umich.eduRemoteGDB::setregs()
2323536Sgblack@eecs.umich.edu{
2337720Sgblack@eecs.umich.edu    PCState pc;
23410595Sgabeblack@google.com    pc.pc(gdbregs.regs64[RegPc]);
23510595Sgabeblack@google.com    pc.npc(gdbregs.regs64[RegNpc]);
2367720Sgblack@eecs.umich.edu    pc.nnpc(pc.npc() + sizeof(MachInst));
2377720Sgblack@eecs.umich.edu    pc.upc(0);
2387720Sgblack@eecs.umich.edu    pc.nupc(1);
2397720Sgblack@eecs.umich.edu    context->pcState(pc);
2407741Sgblack@eecs.umich.edu    for (int x = RegG0; x <= RegI0 + 7; x++)
24110595Sgabeblack@google.com        context->setIntReg(x - RegG0, gdbregs.regs64[x]);
2427741Sgblack@eecs.umich.edu    // Only the integer registers, pc and npc are set in netbsd
2433536Sgblack@eecs.umich.edu}
2443536Sgblack@eecs.umich.edu
2453536Sgblack@eecs.umich.eduvoid
2463536Sgblack@eecs.umich.eduRemoteGDB::clearSingleStep()
2473536Sgblack@eecs.umich.edu{
2484060Ssaidi@eecs.umich.edu   if (nextBkpt)
2494060Ssaidi@eecs.umich.edu       clearTempBreakpoint(nextBkpt);
2503536Sgblack@eecs.umich.edu}
2513536Sgblack@eecs.umich.edu
2523536Sgblack@eecs.umich.eduvoid
2533536Sgblack@eecs.umich.eduRemoteGDB::setSingleStep()
2543536Sgblack@eecs.umich.edu{
2557720Sgblack@eecs.umich.edu    nextBkpt = context->pcState().npc();
2564060Ssaidi@eecs.umich.edu    setTempBreakpoint(nextBkpt);
2573536Sgblack@eecs.umich.edu}
258