src/arch/mips/remote_gdb.cc

   1 /*
   2  * Copyright 2015 LabWare
   3  * Copyright 2014 Google, Inc.
   4  * Copyright (c) 2010 ARM Limited
   5  * All rights reserved
   6  *
   7  * The license below extends only to copyright in the software and shall
   8  * not be construed as granting a license to any other intellectual
   9  * property including but not limited to intellectual property relating
  10  * to a hardware implementation of the functionality of the software
  11  * licensed hereunder.  You may use the software subject to the license
  12  * terms below provided that you ensure that this notice is replicated
  13  * unmodified and in its entirety in all distributions of the software,
  14  * modified or unmodified, in source code or in binary form.
  15  *
  16  * Copyright (c) 2002-2005 The Regents of The University of Michigan
  17  * All rights reserved.
  18  *
  19  * Redistribution and use in source and binary forms, with or without
  20  * modification, are permitted provided that the following conditions are
  21  * met: redistributions of source code must retain the above copyright
  22  * notice, this list of conditions and the following disclaimer;
  23  * redistributions in binary form must reproduce the above copyright
  24  * notice, this list of conditions and the following disclaimer in the
  25  * documentation and/or other materials provided with the distribution;
  26  * neither the name of the copyright holders nor the names of its
  27  * contributors may be used to endorse or promote products derived from
  28  * this software without specific prior written permission.
  29  *
  30  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  31  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  32  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  33  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  34  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  35  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  36  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  37  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  38  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  39  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  40  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  41  *
  42  * Authors: Nathan Binkert
  43  *          William Wang
  44  *          Deyuan Guo
  45  *          Boris Shingarov
  46  */
  47
  48 /*
  49  * Copyright (c) 1990, 1993 The Regents of the University of California
  50  * All rights reserved
  51  *
  52  * This software was developed by the Computer Systems Engineering group
  53  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
  54  * contributed to Berkeley.
  55  *
  56  * All advertising materials mentioning features or use of this software
  57  * must display the following acknowledgement:
  58  *      This product includes software developed by the University of
  59  *      California, Lawrence Berkeley Laboratories.
  60  *
  61  * Redistribution and use in source and binary forms, with or without
  62  * modification, are permitted provided that the following conditions
  63  * are met:
  64  * 1. Redistributions of source code must retain the above copyright
  65  *    notice, this list of conditions and the following disclaimer.
  66  * 2. Redistributions in binary form must reproduce the above copyright
  67  *    notice, this list of conditions and the following disclaimer in the
  68  *    documentation and/or other materials provided with the distribution.
  69  * 3. All advertising materials mentioning features or use of this software
  70  *    must display the following acknowledgement:
  71  *      This product includes software developed by the University of
  72  *      California, Berkeley and its contributors.
  73  * 4. Neither the name of the University nor the names of its contributors
  74  *    may be used to endorse or promote products derived from this software
  75  *    without specific prior written permission.
  76  *
  77  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  78  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  79  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  80  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  81  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  82  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  83  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  84  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  85  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  86  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  87  * SUCH DAMAGE.
  88  *
  89  *      @(#)kgdb_stub.c 8.4 (Berkeley) 1/12/94
  90  */
  91
  92 /*-
  93  * Copyright (c) 2001 The NetBSD Foundation, Inc.
  94  * All rights reserved.
  95  *
  96  * This code is derived from software contributed to The NetBSD Foundation
  97  * by Jason R. Thorpe.
  98  *
  99  * Redistribution and use in source and binary forms, with or without
 100  * modification, are permitted provided that the following conditions
 101  * are met:
 102  * 1. Redistributions of source code must retain the above copyright
 103  *    notice, this list of conditions and the following disclaimer.
 104  * 2. Redistributions in binary form must reproduce the above copyright
 105  *    notice, this list of conditions and the following disclaimer in the
 106  *    documentation and/or other materials provided with the distribution.
 107  * 3. All advertising materials mentioning features or use of this software
 108  *    must display the following acknowledgement:
 109  *      This product includes software developed by the NetBSD
 110  *      Foundation, Inc. and its contributors.
 111  * 4. Neither the name of The NetBSD Foundation nor the names of its
 112  *    contributors may be used to endorse or promote products derived
 113  *    from this software without specific prior written permission.
 114  *
 115  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 116  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 117  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 118  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 119  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 120  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 121  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 122  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 123  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 124  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 125  * POSSIBILITY OF SUCH DAMAGE.
 126  */
 127
 128 /*
 129  * $NetBSD: kgdb_stub.c,v 1.8 2001/07/07 22:58:00 wdk Exp $
 130  *
 131  * Taken from NetBSD
 132  *
 133  * "Stub" to allow remote cpu to debug over a serial line using gdb.
 134  */
 135
 136 #include "arch/mips/remote_gdb.hh"
 137
 138 #include <sys/signal.h>
 139 #include <unistd.h>
 140
 141 #include <string>
 142
 143 #include "arch/mips/decoder.hh"
 144 #include "arch/mips/vtophys.hh"
 145 #include "cpu/thread_state.hh"
 146 #include "debug/GDBAcc.hh"
 147 #include "debug/GDBMisc.hh"
 148 #include "mem/page_table.hh"
 149 #include "sim/full_system.hh"
 150
 151 using namespace std;
 152 using namespace MipsISA;
 153
 154 RemoteGDB::RemoteGDB(System *_system, ThreadContext *tc, int _port)
 155     : BaseRemoteGDB(_system, tc, _port), regCache(this)
 156 {
 157 }
 158
 159 /*
 160  * Determine if the mapping at va..(va+len) is valid.
 161  */
 162 bool
 163 RemoteGDB::acc(Addr va, size_t len)
 164 {
 165     // Check to make sure the first byte is mapped into the processes address
 166     // space.
 167     panic_if(FullSystem, "acc not implemented for MIPS FS!");
 168     return context()->getProcessPtr()->pTable->lookup(va) != nullptr;
 169 }
 170
 171 void
 172 RemoteGDB::MipsGdbRegCache::getRegs(ThreadContext *context)
 173 {
 174     DPRINTF(GDBAcc, "getregs in remotegdb \n");
 175
 176     for (int i = 0; i < 32; i++) r.gpr[i] = context->readIntReg(i);
 177     r.sr = context->readMiscRegNoEffect(MISCREG_STATUS);
 178     r.lo = context->readIntReg(INTREG_LO);
 179     r.hi = context->readIntReg(INTREG_HI);
 180     r.badvaddr = context->readMiscRegNoEffect(MISCREG_BADVADDR);
 181     r.cause = context->readMiscRegNoEffect(MISCREG_CAUSE);
 182     r.pc = context->pcState().pc();
 183     for (int i = 0; i < 32; i++) r.fpr[i] = context->readFloatReg(i);
 184     r.fsr = context->readFloatReg(FLOATREG_FCCR);
 185     r.fir = context->readFloatReg(FLOATREG_FIR);
 186 }
 187
 188 void
 189 RemoteGDB::MipsGdbRegCache::setRegs(ThreadContext *context) const
 190 {
 191     DPRINTF(GDBAcc, "setregs in remotegdb \n");
 192
 193     for (int i = 1; i < 32; i++) context->setIntReg(i, r.gpr[i]);
 194     context->setMiscRegNoEffect(MISCREG_STATUS, r.sr);
 195     context->setIntReg(INTREG_LO, r.lo);
 196     context->setIntReg(INTREG_HI, r.hi);
 197     context->setMiscRegNoEffect(MISCREG_BADVADDR, r.badvaddr);
 198     context->setMiscRegNoEffect(MISCREG_CAUSE, r.cause);
 199     context->pcState(r.pc);
 200     for (int i = 0; i < 32; i++) context->setFloatReg(i, r.fpr[i]);
 201     context->setFloatReg(FLOATREG_FCCR, r.fsr);
 202     context->setFloatReg(FLOATREG_FIR, r.fir);
 203 }
 204
 205 BaseGdbRegCache*
 206 RemoteGDB::gdbRegs()
 207 {
 208     return &regCache;
 209 }