src/arch/riscv/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) 2017 The University of Virginia
  17  * Copyright (c) 2002-2005 The Regents of The University of Michigan
  18  * All rights reserved.
  19  *
  20  * Redistribution and use in source and binary forms, with or without
  21  * modification, are permitted provided that the following conditions are
  22  * met: redistributions of source code must retain the above copyright
  23  * notice, this list of conditions and the following disclaimer;
  24  * redistributions in binary form must reproduce the above copyright
  25  * notice, this list of conditions and the following disclaimer in the
  26  * documentation and/or other materials provided with the distribution;
  27  * neither the name of the copyright holders nor the names of its
  28  * contributors may be used to endorse or promote products derived from
  29  * this software without specific prior written permission.
  30  *
  31  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  32  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  33  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  34  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  35  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  36  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  37  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  38  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  39  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  40  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  41  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  42  *
  43  * Authors: Nathan Binkert
  44  *          William Wang
  45  *          Deyuan Guo
  46  *          Boris Shingarov
  47  *          Alec Roelke
  48  */
  49
  50 /*
  51  * Copyright (c) 1990, 1993 The Regents of the University of California
  52  * All rights reserved
  53  *
  54  * This software was developed by the Computer Systems Engineering group
  55  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
  56  * contributed to Berkeley.
  57  *
  58  * All advertising materials mentioning features or use of this software
  59  * must display the following acknowledgement:
  60  *      This product includes software developed by the University of
  61  *      California, Lawrence Berkeley Laboratories.
  62  *
  63  * Redistribution and use in source and binary forms, with or without
  64  * modification, are permitted provided that the following conditions
  65  * are met:
  66  * 1. Redistributions of source code must retain the above copyright
  67  *    notice, this list of conditions and the following disclaimer.
  68  * 2. Redistributions in binary form must reproduce the above copyright
  69  *    notice, this list of conditions and the following disclaimer in the
  70  *    documentation and/or other materials provided with the distribution.
  71  * 3. All advertising materials mentioning features or use of this software
  72  *    must display the following acknowledgement:
  73  *      This product includes software developed by the University of
  74  *      California, Berkeley and its contributors.
  75  * 4. Neither the name of the University nor the names of its contributors
  76  *    may be used to endorse or promote products derived from this software
  77  *    without specific prior written permission.
  78  *
  79  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  80  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  81  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  82  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  83  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  84  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  85  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  86  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  87  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  88  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  89  * SUCH DAMAGE.
  90  *
  91  *      @(#)kgdb_stub.c 8.4 (Berkeley) 1/12/94
  92  */
  93
  94 /*-
  95  * Copyright (c) 2001 The NetBSD Foundation, Inc.
  96  * All rights reserved.
  97  *
  98  * This code is derived from software contributed to The NetBSD Foundation
  99  * by Jason R. Thorpe.
 100  *
 101  * Redistribution and use in source and binary forms, with or without
 102  * modification, are permitted provided that the following conditions
 103  * are met:
 104  * 1. Redistributions of source code must retain the above copyright
 105  *    notice, this list of conditions and the following disclaimer.
 106  * 2. Redistributions in binary form must reproduce the above copyright
 107  *    notice, this list of conditions and the following disclaimer in the
 108  *    documentation and/or other materials provided with the distribution.
 109  * 3. All advertising materials mentioning features or use of this software
 110  *    must display the following acknowledgement:
 111  *      This product includes software developed by the NetBSD
 112  *      Foundation, Inc. and its contributors.
 113  * 4. Neither the name of The NetBSD Foundation nor the names of its
 114  *    contributors may be used to endorse or promote products derived
 115  *    from this software without specific prior written permission.
 116  *
 117  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 118  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 119  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 120  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 121  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 122  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 123  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 124  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 125  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 126  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 127  * POSSIBILITY OF SUCH DAMAGE.
 128  */
 129
 130 /*
 131  * $NetBSD: kgdb_stub.c,v 1.8 2001/07/07 22:58:00 wdk Exp $
 132  *
 133  * Taken from NetBSD
 134  *
 135  * "Stub" to allow remote cpu to debug over a serial line using gdb.
 136  */
 137
 138 #include "arch/riscv/remote_gdb.hh"
 139
 140 #include <string>
 141
 142 #include "arch/riscv/registers.hh"
 143 #include "cpu/thread_state.hh"
 144 #include "debug/GDBAcc.hh"
 145 #include "mem/page_table.hh"
 146 #include "sim/full_system.hh"
 147
 148 using namespace std;
 149 using namespace RiscvISA;
 150
 151 RemoteGDB::RemoteGDB(System *_system, ThreadContext *tc, int _port)
 152     : BaseRemoteGDB(_system, tc, _port), regCache(this)
 153 {
 154 }
 155
 156 bool
 157 RemoteGDB::acc(Addr va, size_t len)
 158 {
 159     panic_if(FullSystem, "acc not implemented for RISCV FS!");
 160     return context()->getProcessPtr()->pTable->lookup(va) != nullptr;
 161 }
 162
 163 void
 164 RemoteGDB::RiscvGdbRegCache::getRegs(ThreadContext *context)
 165 {
 166     DPRINTF(GDBAcc, "getregs in remotegdb, size %lu\n", size());
 167     for (int i = 0; i < NumIntArchRegs; i++)
 168         r.gpr[i] = context->readIntReg(i);
 169     r.pc = context->pcState().pc();
 170     for (int i = 0; i < NumFloatRegs; i++)
 171         r.fpr[i] = context->readFloatRegBits(i);
 172
 173     r.csr_base = context->readMiscReg(0);
 174     r.fflags = context->readMiscReg(CSR_FFLAGS);
 175     r.frm = context->readMiscReg(CSR_FRM);
 176     r.fcsr = context->readMiscReg(CSR_FCSR);
 177     for (int i = ExplicitCSRs; i < NumMiscRegs; i++)
 178         r.csr[i - ExplicitCSRs] = context->readMiscReg(i);
 179 }
 180
 181 void
 182 RemoteGDB::RiscvGdbRegCache::setRegs(ThreadContext *context) const
 183 {
 184     DPRINTF(GDBAcc, "setregs in remotegdb \n");
 185     for (int i = 0; i < NumIntArchRegs; i++)
 186         context->setIntReg(i, r.gpr[i]);
 187     context->pcState(r.pc);
 188     for (int i = 0; i < NumFloatRegs; i++)
 189         context->setFloatRegBits(i, r.fpr[i]);
 190
 191     context->setMiscReg(0, r.csr_base);
 192     context->setMiscReg(CSR_FFLAGS, r.fflags);
 193     context->setMiscReg(CSR_FRM, r.frm);
 194     context->setMiscReg(CSR_FCSR, r.fcsr);
 195     for (int i = ExplicitCSRs; i < NumMiscRegs; i++)
 196         context->setMiscReg(i, r.csr[i - ExplicitCSRs]);
 197 }
 198
 199 BaseGdbRegCache*
 200 RemoteGDB::gdbRegs()
 201 {
 202     return &regCache;
 203 }