src/arch/riscv/remote_gdb.cc

   1 /*
   2  * Copyright 2015 LabWare
   3  * Copyright 2014 Google, Inc.
   4  * Copyright (c) 2010 ARM Limited
   5  * Copyright (c) 2020 Barkhausen Institut
   6  * All rights reserved
   7  *
   8  * The license below extends only to copyright in the software and shall
   9  * not be construed as granting a license to any other intellectual
  10  * property including but not limited to intellectual property relating
  11  * to a hardware implementation of the functionality of the software
  12  * licensed hereunder.  You may use the software subject to the license
  13  * terms below provided that you ensure that this notice is replicated
  14  * unmodified and in its entirety in all distributions of the software,
  15  * modified or unmodified, in source code or in binary form.
  16  *
  17  * Copyright (c) 2017 The University of Virginia
  18  * Copyright (c) 2002-2005 The Regents of The University of Michigan
  19  * All rights reserved.
  20  *
  21  * Redistribution and use in source and binary forms, with or without
  22  * modification, are permitted provided that the following conditions are
  23  * met: redistributions of source code must retain the above copyright
  24  * notice, this list of conditions and the following disclaimer;
  25  * redistributions in binary form must reproduce the above copyright
  26  * notice, this list of conditions and the following disclaimer in the
  27  * documentation and/or other materials provided with the distribution;
  28  * neither the name of the copyright holders nor the names of its
  29  * contributors may be used to endorse or promote products derived from
  30  * this software without specific prior written permission.
  31  *
  32  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  33  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  34  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  35  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  36  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  37  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  38  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  39  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  40  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  41  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  42  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  43  */
  44
  45 /*
  46  * Copyright (c) 1990, 1993 The Regents of the University of California
  47  * All rights reserved
  48  *
  49  * This software was developed by the Computer Systems Engineering group
  50  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
  51  * contributed to Berkeley.
  52  *
  53  * All advertising materials mentioning features or use of this software
  54  * must display the following acknowledgement:
  55  *      This product includes software developed by the University of
  56  *      California, Lawrence Berkeley Laboratories.
  57  *
  58  * Redistribution and use in source and binary forms, with or without
  59  * modification, are permitted provided that the following conditions
  60  * are met:
  61  * 1. Redistributions of source code must retain the above copyright
  62  *    notice, this list of conditions and the following disclaimer.
  63  * 2. Redistributions in binary form must reproduce the above copyright
  64  *    notice, this list of conditions and the following disclaimer in the
  65  *    documentation and/or other materials provided with the distribution.
  66  * 3. All advertising materials mentioning features or use of this software
  67  *    must display the following acknowledgement:
  68  *      This product includes software developed by the University of
  69  *      California, Berkeley and its contributors.
  70  * 4. Neither the name of the University nor the names of its contributors
  71  *    may be used to endorse or promote products derived from this software
  72  *    without specific prior written permission.
  73  *
  74  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  75  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  76  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  77  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  78  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  79  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  80  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  81  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  82  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  83  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  84  * SUCH DAMAGE.
  85  *
  86  *      @(#)kgdb_stub.c 8.4 (Berkeley) 1/12/94
  87  */
  88
  89 /*-
  90  * Copyright (c) 2001 The NetBSD Foundation, Inc.
  91  * All rights reserved.
  92  *
  93  * This code is derived from software contributed to The NetBSD Foundation
  94  * by Jason R. Thorpe.
  95  *
  96  * Redistribution and use in source and binary forms, with or without
  97  * modification, are permitted provided that the following conditions
  98  * are met:
  99  * 1. Redistributions of source code must retain the above copyright
 100  *    notice, this list of conditions and the following disclaimer.
 101  * 2. Redistributions in binary form must reproduce the above copyright
 102  *    notice, this list of conditions and the following disclaimer in the
 103  *    documentation and/or other materials provided with the distribution.
 104  * 3. All advertising materials mentioning features or use of this software
 105  *    must display the following acknowledgement:
 106  *      This product includes software developed by the NetBSD
 107  *      Foundation, Inc. and its contributors.
 108  * 4. Neither the name of The NetBSD Foundation nor the names of its
 109  *    contributors may be used to endorse or promote products derived
 110  *    from this software without specific prior written permission.
 111  *
 112  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 113  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 114  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 115  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 116  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 117  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 118  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 119  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 120  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 121  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 122  * POSSIBILITY OF SUCH DAMAGE.
 123  */
 124
 125 /*
 126  * $NetBSD: kgdb_stub.c,v 1.8 2001/07/07 22:58:00 wdk Exp $
 127  *
 128  * Taken from NetBSD
 129  *
 130  * "Stub" to allow remote cpu to debug over a serial line using gdb.
 131  */
 132
 133 #include "arch/riscv/remote_gdb.hh"
 134
 135 #include <string>
 136
 137 #include "arch/riscv/pagetable_walker.hh"
 138 #include "arch/riscv/registers.hh"
 139 #include "arch/riscv/tlb.hh"
 140 #include "cpu/thread_state.hh"
 141 #include "debug/GDBAcc.hh"
 142 #include "mem/page_table.hh"
 143 #include "sim/full_system.hh"
 144
 145 using namespace std;
 146 using namespace RiscvISA;
 147
 148 RemoteGDB::RemoteGDB(System *_system, ThreadContext *tc, int _port)
 149     : BaseRemoteGDB(_system, tc, _port), regCache(this)
 150 {
 151 }
 152
 153 bool
 154 RemoteGDB::acc(Addr va, size_t len)
 155 {
 156     if (FullSystem)
 157     {
 158         TLB *tlb = dynamic_cast<TLB *>(context()->getDTBPtr());
 159         unsigned logBytes;
 160         Addr paddr = va;
 161
 162         PrivilegeMode pmode = tlb->getMemPriv(context(), BaseTLB::Read);
 163         SATP satp = context()->readMiscReg(MISCREG_SATP);
 164         if (pmode != PrivilegeMode::PRV_M &&
 165             satp.mode != AddrXlateMode::BARE) {
 166             Walker *walker = tlb->getWalker();
 167             Fault fault = walker->startFunctional(
 168                     context(), paddr, logBytes, BaseTLB::Read);
 169             if (fault != NoFault)
 170                 return false;
 171         }
 172         return true;
 173     }
 174
 175     return context()->getProcessPtr()->pTable->lookup(va) != nullptr;
 176 }
 177
 178 void
 179 RemoteGDB::RiscvGdbRegCache::getRegs(ThreadContext *context)
 180 {
 181     DPRINTF(GDBAcc, "getregs in remotegdb, size %lu\n", size());
 182     for (int i = 0; i < NumIntArchRegs; i++)
 183         r.gpr[i] = context->readIntReg(i);
 184     r.pc = context->pcState().pc();
 185 }
 186
 187 void
 188 RemoteGDB::RiscvGdbRegCache::setRegs(ThreadContext *context) const
 189 {
 190     DPRINTF(GDBAcc, "setregs in remotegdb \n");
 191     for (int i = 0; i < NumIntArchRegs; i++)
 192         context->setIntReg(i, r.gpr[i]);
 193     context->pcState(r.pc);
 194 }
 195
 196 BaseGdbRegCache*
 197 RemoteGDB::gdbRegs()
 198 {
 199     return &regCache;
 200 }