remote_gdb.cc revision 7720
13536Sgblack@eecs.umich.edu/*
23536Sgblack@eecs.umich.edu * Copyright (c) 2002-2005 The Regents of The University of Michigan
33536Sgblack@eecs.umich.edu * All rights reserved.
43536Sgblack@eecs.umich.edu *
53536Sgblack@eecs.umich.edu * Redistribution and use in source and binary forms, with or without
63536Sgblack@eecs.umich.edu * modification, are permitted provided that the following conditions are
73536Sgblack@eecs.umich.edu * met: redistributions of source code must retain the above copyright
83536Sgblack@eecs.umich.edu * notice, this list of conditions and the following disclaimer;
93536Sgblack@eecs.umich.edu * redistributions in binary form must reproduce the above copyright
103536Sgblack@eecs.umich.edu * notice, this list of conditions and the following disclaimer in the
113536Sgblack@eecs.umich.edu * documentation and/or other materials provided with the distribution;
123536Sgblack@eecs.umich.edu * neither the name of the copyright holders nor the names of its
133536Sgblack@eecs.umich.edu * contributors may be used to endorse or promote products derived from
143536Sgblack@eecs.umich.edu * this software without specific prior written permission.
153536Sgblack@eecs.umich.edu *
163536Sgblack@eecs.umich.edu * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
173536Sgblack@eecs.umich.edu * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
183536Sgblack@eecs.umich.edu * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
193536Sgblack@eecs.umich.edu * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
203536Sgblack@eecs.umich.edu * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
213536Sgblack@eecs.umich.edu * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
223536Sgblack@eecs.umich.edu * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
233536Sgblack@eecs.umich.edu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
243536Sgblack@eecs.umich.edu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
253536Sgblack@eecs.umich.edu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
263536Sgblack@eecs.umich.edu * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
273536Sgblack@eecs.umich.edu *
283536Sgblack@eecs.umich.edu * Authors: Nathan Binkert
293536Sgblack@eecs.umich.edu */
303536Sgblack@eecs.umich.edu
313536Sgblack@eecs.umich.edu/*
323536Sgblack@eecs.umich.edu * Copyright (c) 1990, 1993
335543Ssaidi@eecs.umich.edu *      The Regents of the University of California.  All rights reserved.
343536Sgblack@eecs.umich.edu *
353536Sgblack@eecs.umich.edu * This software was developed by the Computer Systems Engineering group
363536Sgblack@eecs.umich.edu * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
373536Sgblack@eecs.umich.edu * contributed to Berkeley.
383536Sgblack@eecs.umich.edu *
393536Sgblack@eecs.umich.edu * All advertising materials mentioning features or use of this software
403536Sgblack@eecs.umich.edu * must display the following acknowledgement:
415543Ssaidi@eecs.umich.edu *      This product includes software developed by the University of
425543Ssaidi@eecs.umich.edu *      California, Lawrence Berkeley Laboratories.
433536Sgblack@eecs.umich.edu *
443536Sgblack@eecs.umich.edu * Redistribution and use in source and binary forms, with or without
453536Sgblack@eecs.umich.edu * modification, are permitted provided that the following conditions
463536Sgblack@eecs.umich.edu * are met:
473536Sgblack@eecs.umich.edu * 1. Redistributions of source code must retain the above copyright
483536Sgblack@eecs.umich.edu *    notice, this list of conditions and the following disclaimer.
493536Sgblack@eecs.umich.edu * 2. Redistributions in binary form must reproduce the above copyright
503536Sgblack@eecs.umich.edu *    notice, this list of conditions and the following disclaimer in the
513536Sgblack@eecs.umich.edu *    documentation and/or other materials provided with the distribution.
523536Sgblack@eecs.umich.edu * 3. All advertising materials mentioning features or use of this software
533536Sgblack@eecs.umich.edu *    must display the following acknowledgement:
545543Ssaidi@eecs.umich.edu *      This product includes software developed by the University of
555543Ssaidi@eecs.umich.edu *      California, Berkeley and its contributors.
563536Sgblack@eecs.umich.edu * 4. Neither the name of the University nor the names of its contributors
573536Sgblack@eecs.umich.edu *    may be used to endorse or promote products derived from this software
583536Sgblack@eecs.umich.edu *    without specific prior written permission.
593536Sgblack@eecs.umich.edu *
603536Sgblack@eecs.umich.edu * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
613536Sgblack@eecs.umich.edu * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
623536Sgblack@eecs.umich.edu * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
633536Sgblack@eecs.umich.edu * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
643536Sgblack@eecs.umich.edu * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
653536Sgblack@eecs.umich.edu * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
663536Sgblack@eecs.umich.edu * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
673536Sgblack@eecs.umich.edu * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
683536Sgblack@eecs.umich.edu * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
693536Sgblack@eecs.umich.edu * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
703536Sgblack@eecs.umich.edu * SUCH DAMAGE.
713536Sgblack@eecs.umich.edu *
725543Ssaidi@eecs.umich.edu *      @(#)kgdb_stub.c 8.4 (Berkeley) 1/12/94
733536Sgblack@eecs.umich.edu */
743536Sgblack@eecs.umich.edu
753536Sgblack@eecs.umich.edu/*-
763536Sgblack@eecs.umich.edu * Copyright (c) 2001 The NetBSD Foundation, Inc.
773536Sgblack@eecs.umich.edu * All rights reserved.
783536Sgblack@eecs.umich.edu *
793536Sgblack@eecs.umich.edu * This code is derived from software contributed to The NetBSD Foundation
803536Sgblack@eecs.umich.edu * by Jason R. Thorpe.
813536Sgblack@eecs.umich.edu *
823536Sgblack@eecs.umich.edu * Redistribution and use in source and binary forms, with or without
833536Sgblack@eecs.umich.edu * modification, are permitted provided that the following conditions
843536Sgblack@eecs.umich.edu * are met:
853536Sgblack@eecs.umich.edu * 1. Redistributions of source code must retain the above copyright
863536Sgblack@eecs.umich.edu *    notice, this list of conditions and the following disclaimer.
873536Sgblack@eecs.umich.edu * 2. Redistributions in binary form must reproduce the above copyright
883536Sgblack@eecs.umich.edu *    notice, this list of conditions and the following disclaimer in the
893536Sgblack@eecs.umich.edu *    documentation and/or other materials provided with the distribution.
903536Sgblack@eecs.umich.edu * 3. All advertising materials mentioning features or use of this software
913536Sgblack@eecs.umich.edu *    must display the following acknowledgement:
925543Ssaidi@eecs.umich.edu *      This product includes software developed by the NetBSD
935543Ssaidi@eecs.umich.edu *      Foundation, Inc. and its contributors.
943536Sgblack@eecs.umich.edu * 4. Neither the name of The NetBSD Foundation nor the names of its
953536Sgblack@eecs.umich.edu *    contributors may be used to endorse or promote products derived
963536Sgblack@eecs.umich.edu *    from this software without specific prior written permission.
973536Sgblack@eecs.umich.edu *
983536Sgblack@eecs.umich.edu * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
993536Sgblack@eecs.umich.edu * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
1003536Sgblack@eecs.umich.edu * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
1013536Sgblack@eecs.umich.edu * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
1023536Sgblack@eecs.umich.edu * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
1033536Sgblack@eecs.umich.edu * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
1043536Sgblack@eecs.umich.edu * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
1053536Sgblack@eecs.umich.edu * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
1063536Sgblack@eecs.umich.edu * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
1073536Sgblack@eecs.umich.edu * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
1083536Sgblack@eecs.umich.edu * POSSIBILITY OF SUCH DAMAGE.
1093536Sgblack@eecs.umich.edu */
1103536Sgblack@eecs.umich.edu
1113536Sgblack@eecs.umich.edu/*
1123536Sgblack@eecs.umich.edu * $NetBSD: kgdb_stub.c,v 1.8 2001/07/07 22:58:00 wdk Exp $
1133536Sgblack@eecs.umich.edu *
1143536Sgblack@eecs.umich.edu * Taken from NetBSD
1153536Sgblack@eecs.umich.edu *
1163536Sgblack@eecs.umich.edu * "Stub" to allow remote cpu to debug over a serial line using gdb.
1173536Sgblack@eecs.umich.edu */
1183536Sgblack@eecs.umich.edu
1193536Sgblack@eecs.umich.edu#include <sys/signal.h>
1203536Sgblack@eecs.umich.edu
1213536Sgblack@eecs.umich.edu#include <string>
1223536Sgblack@eecs.umich.edu#include <unistd.h>
1233536Sgblack@eecs.umich.edu
1243536Sgblack@eecs.umich.edu#include "arch/vtophys.hh"
1253536Sgblack@eecs.umich.edu#include "arch/sparc/remote_gdb.hh"
1263536Sgblack@eecs.umich.edu#include "base/intmath.hh"
1273536Sgblack@eecs.umich.edu#include "base/remote_gdb.hh"
1283536Sgblack@eecs.umich.edu#include "base/socket.hh"
1293536Sgblack@eecs.umich.edu#include "base/trace.hh"
1303536Sgblack@eecs.umich.edu#include "config/full_system.hh"
1313536Sgblack@eecs.umich.edu#include "cpu/thread_context.hh"
1323536Sgblack@eecs.umich.edu#include "cpu/static_inst.hh"
1335107Sgblack@eecs.umich.edu#include "mem/page_table.hh"
1343536Sgblack@eecs.umich.edu#include "mem/physical.hh"
1353536Sgblack@eecs.umich.edu#include "mem/port.hh"
1367678Sgblack@eecs.umich.edu#include "sim/byteswap.hh"
1375107Sgblack@eecs.umich.edu#include "sim/process.hh"
1383536Sgblack@eecs.umich.edu#include "sim/system.hh"
1393536Sgblack@eecs.umich.edu
1403536Sgblack@eecs.umich.eduusing namespace std;
1415567Snate@binkert.orgusing namespace SparcISA;
1423536Sgblack@eecs.umich.edu
1433550Sgblack@eecs.umich.eduRemoteGDB::RemoteGDB(System *_system, ThreadContext *c)
1444060Ssaidi@eecs.umich.edu    : BaseRemoteGDB(_system, c, NumGDBRegs), nextBkpt(0)
1453536Sgblack@eecs.umich.edu{}
1463536Sgblack@eecs.umich.edu
1473536Sgblack@eecs.umich.edu///////////////////////////////////////////////////////////
1483536Sgblack@eecs.umich.edu// RemoteGDB::acc
1493536Sgblack@eecs.umich.edu//
1505543Ssaidi@eecs.umich.edu//      Determine if the mapping at va..(va+len) is valid.
1513536Sgblack@eecs.umich.edu//
1523536Sgblack@eecs.umich.edubool
1533536Sgblack@eecs.umich.eduRemoteGDB::acc(Addr va, size_t len)
1543536Sgblack@eecs.umich.edu{
1553571Sgblack@eecs.umich.edu    //@Todo In NetBSD, this function checks if all addresses
1565107Sgblack@eecs.umich.edu    //from va to va + len have valid page map entries. Not
1573571Sgblack@eecs.umich.edu    //sure how this will work for other OSes or in general.
1585107Sgblack@eecs.umich.edu#if FULL_SYSTEM
1594070Ssaidi@eecs.umich.edu    if (va)
1604070Ssaidi@eecs.umich.edu        return true;
1614070Ssaidi@eecs.umich.edu    return false;
1625107Sgblack@eecs.umich.edu#else
1635107Sgblack@eecs.umich.edu    TlbEntry entry;
1645107Sgblack@eecs.umich.edu    //Check to make sure the first byte is mapped into the processes address
1655107Sgblack@eecs.umich.edu    //space.
1665107Sgblack@eecs.umich.edu    if (context->getProcessPtr()->pTable->lookup(va, entry))
1675107Sgblack@eecs.umich.edu        return true;
1685107Sgblack@eecs.umich.edu    return false;
1695107Sgblack@eecs.umich.edu#endif
1703536Sgblack@eecs.umich.edu}
1713536Sgblack@eecs.umich.edu
1723536Sgblack@eecs.umich.edu///////////////////////////////////////////////////////////
1733536Sgblack@eecs.umich.edu// RemoteGDB::getregs
1743536Sgblack@eecs.umich.edu//
1755543Ssaidi@eecs.umich.edu//      Translate the kernel debugger register format into
1765543Ssaidi@eecs.umich.edu//      the GDB register format.
1773536Sgblack@eecs.umich.eduvoid
1783536Sgblack@eecs.umich.eduRemoteGDB::getregs()
1793536Sgblack@eecs.umich.edu{
1803536Sgblack@eecs.umich.edu    memset(gdbregs.regs, 0, gdbregs.size);
1813536Sgblack@eecs.umich.edu
1827720Sgblack@eecs.umich.edu    PCState pc = context->pcState();
1837720Sgblack@eecs.umich.edu
1844172Ssaidi@eecs.umich.edu    if (context->readMiscReg(MISCREG_PSTATE) &
1854070Ssaidi@eecs.umich.edu           PSTATE::am) {
1864070Ssaidi@eecs.umich.edu        uint32_t *regs;
1874070Ssaidi@eecs.umich.edu        regs = (uint32_t*)gdbregs.regs;
1887720Sgblack@eecs.umich.edu        regs[Reg32Pc] = htobe((uint32_t)pc.pc());
1897720Sgblack@eecs.umich.edu        regs[Reg32Npc] = htobe((uint32_t)pc.npc());
1904070Ssaidi@eecs.umich.edu        for(int x = RegG0; x <= RegI0 + 7; x++)
1914070Ssaidi@eecs.umich.edu            regs[x] = htobe((uint32_t)context->readIntReg(x - RegG0));
1924060Ssaidi@eecs.umich.edu
1934070Ssaidi@eecs.umich.edu        regs[Reg32Y] = htobe((uint32_t)context->readIntReg(NumIntArchRegs + 1));
1944172Ssaidi@eecs.umich.edu        regs[Reg32Psr] = htobe((uint32_t)context->readMiscReg(MISCREG_PSTATE));
1954172Ssaidi@eecs.umich.edu        regs[Reg32Fsr] = htobe((uint32_t)context->readMiscReg(MISCREG_FSR));
1964070Ssaidi@eecs.umich.edu        regs[Reg32Csr] = htobe((uint32_t)context->readIntReg(NumIntArchRegs + 2));
1974070Ssaidi@eecs.umich.edu    } else {
1987720Sgblack@eecs.umich.edu        gdbregs.regs[RegPc] = htobe(pc.pc());
1997720Sgblack@eecs.umich.edu        gdbregs.regs[RegNpc] = htobe(pc.npc());
2004070Ssaidi@eecs.umich.edu        for(int x = RegG0; x <= RegI0 + 7; x++)
2014070Ssaidi@eecs.umich.edu            gdbregs.regs[x] = htobe(context->readIntReg(x - RegG0));
2024060Ssaidi@eecs.umich.edu
2034172Ssaidi@eecs.umich.edu        gdbregs.regs[RegFsr] = htobe(context->readMiscReg(MISCREG_FSR));
2044172Ssaidi@eecs.umich.edu        gdbregs.regs[RegFprs] = htobe(context->readMiscReg(MISCREG_FPRS));
2054070Ssaidi@eecs.umich.edu        gdbregs.regs[RegY] = htobe(context->readIntReg(NumIntArchRegs + 1));
2064070Ssaidi@eecs.umich.edu        gdbregs.regs[RegState] = htobe(
2074172Ssaidi@eecs.umich.edu            context->readMiscReg(MISCREG_CWP) |
2084172Ssaidi@eecs.umich.edu            context->readMiscReg(MISCREG_PSTATE) << 8 |
2094172Ssaidi@eecs.umich.edu            context->readMiscReg(MISCREG_ASI) << 24 |
2104070Ssaidi@eecs.umich.edu            context->readIntReg(NumIntArchRegs + 2) << 32);
2114070Ssaidi@eecs.umich.edu    }
2124060Ssaidi@eecs.umich.edu
2134060Ssaidi@eecs.umich.edu    DPRINTF(GDBRead, "PC=%#x\n", gdbregs.regs[RegPc]);
2144060Ssaidi@eecs.umich.edu
2153571Sgblack@eecs.umich.edu    //Floating point registers are left at 0 in netbsd
2163571Sgblack@eecs.umich.edu    //All registers other than the pc, npc and int regs
2173571Sgblack@eecs.umich.edu    //are ignored as well.
2183536Sgblack@eecs.umich.edu}
2193536Sgblack@eecs.umich.edu
2203536Sgblack@eecs.umich.edu///////////////////////////////////////////////////////////
2213536Sgblack@eecs.umich.edu// RemoteGDB::setregs
2223536Sgblack@eecs.umich.edu//
2235543Ssaidi@eecs.umich.edu//      Translate the GDB register format into the kernel
2245543Ssaidi@eecs.umich.edu//      debugger register format.
2253536Sgblack@eecs.umich.edu//
2263536Sgblack@eecs.umich.eduvoid
2273536Sgblack@eecs.umich.eduRemoteGDB::setregs()
2283536Sgblack@eecs.umich.edu{
2297720Sgblack@eecs.umich.edu    PCState pc;
2307720Sgblack@eecs.umich.edu    pc.pc(gdbregs.regs[RegPc]);
2317720Sgblack@eecs.umich.edu    pc.npc(gdbregs.regs[RegNpc]);
2327720Sgblack@eecs.umich.edu    pc.nnpc(pc.npc() + sizeof(MachInst));
2337720Sgblack@eecs.umich.edu    pc.upc(0);
2347720Sgblack@eecs.umich.edu    pc.nupc(1);
2357720Sgblack@eecs.umich.edu    context->pcState(pc);
2363571Sgblack@eecs.umich.edu    for(int x = RegG0; x <= RegI0 + 7; x++)
2373550Sgblack@eecs.umich.edu        context->setIntReg(x - RegG0, gdbregs.regs[x]);
2383571Sgblack@eecs.umich.edu    //Only the integer registers, pc and npc are set in netbsd
2393536Sgblack@eecs.umich.edu}
2403536Sgblack@eecs.umich.edu
2413536Sgblack@eecs.umich.eduvoid
2423536Sgblack@eecs.umich.eduRemoteGDB::clearSingleStep()
2433536Sgblack@eecs.umich.edu{
2444060Ssaidi@eecs.umich.edu   if (nextBkpt)
2454060Ssaidi@eecs.umich.edu       clearTempBreakpoint(nextBkpt);
2463536Sgblack@eecs.umich.edu}
2473536Sgblack@eecs.umich.edu
2483536Sgblack@eecs.umich.eduvoid
2493536Sgblack@eecs.umich.eduRemoteGDB::setSingleStep()
2503536Sgblack@eecs.umich.edu{
2517720Sgblack@eecs.umich.edu    nextBkpt = context->pcState().npc();
2524060Ssaidi@eecs.umich.edu    setTempBreakpoint(nextBkpt);
2533536Sgblack@eecs.umich.edu}
254