src/arch/arm/remote_gdb.cc

   1 /*
   2  * Copyright 2015 LabWare
   3  * Copyright 2014 Google Inc.
   4  * Copyright (c) 2010, 2013 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  *          Boris Shingarov
  45  */
  46
  47 /*
  48  * Copyright (c) 1990, 1993 The Regents of the University of California
  49  * All rights reserved
  50  *
  51  * This software was developed by the Computer Systems Engineering group
  52  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
  53  * contributed to Berkeley.
  54  *
  55  * All advertising materials mentioning features or use of this software
  56  * must display the following acknowledgement:
  57  *      This product includes software developed by the University of
  58  *      California, Lawrence Berkeley Laboratories.
  59  *
  60  * Redistribution and use in source and binary forms, with or without
  61  * modification, are permitted provided that the following conditions
  62  * are met:
  63  * 1. Redistributions of source code must retain the above copyright
  64  *    notice, this list of conditions and the following disclaimer.
  65  * 2. Redistributions in binary form must reproduce the above copyright
  66  *    notice, this list of conditions and the following disclaimer in the
  67  *    documentation and/or other materials provided with the distribution.
  68  * 3. All advertising materials mentioning features or use of this software
  69  *    must display the following acknowledgement:
  70  *      This product includes software developed by the University of
  71  *      California, Berkeley and its contributors.
  72  * 4. Neither the name of the University nor the names of its contributors
  73  *    may be used to endorse or promote products derived from this software
  74  *    without specific prior written permission.
  75  *
  76  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  77  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  78  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  79  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  80  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  81  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  82  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  83  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  84  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  85  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  86  * SUCH DAMAGE.
  87  *
  88  *      @(#)kgdb_stub.c 8.4 (Berkeley) 1/12/94
  89  */
  90
  91 /*-
  92  * Copyright (c) 2001 The NetBSD Foundation, Inc.
  93  * All rights reserved.
  94  *
  95  * This code is derived from software contributed to The NetBSD Foundation
  96  * by Jason R. Thorpe.
  97  *
  98  * Redistribution and use in source and binary forms, with or without
  99  * modification, are permitted provided that the following conditions
 100  * are met:
 101  * 1. Redistributions of source code must retain the above copyright
 102  *    notice, this list of conditions and the following disclaimer.
 103  * 2. Redistributions in binary form must reproduce the above copyright
 104  *    notice, this list of conditions and the following disclaimer in the
 105  *    documentation and/or other materials provided with the distribution.
 106  * 3. All advertising materials mentioning features or use of this software
 107  *    must display the following acknowledgement:
 108  *      This product includes software developed by the NetBSD
 109  *      Foundation, Inc. and its contributors.
 110  * 4. Neither the name of The NetBSD Foundation nor the names of its
 111  *    contributors may be used to endorse or promote products derived
 112  *    from this software without specific prior written permission.
 113  *
 114  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 115  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 116  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 117  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 118  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 119  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 120  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 121  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 122  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 123  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 124  * POSSIBILITY OF SUCH DAMAGE.
 125  */
 126
 127 /*
 128  * $NetBSD: kgdb_stub.c,v 1.8 2001/07/07 22:58:00 wdk Exp $
 129  *
 130  * Taken from NetBSD
 131  *
 132  * "Stub" to allow remote cpu to debug over a serial line using gdb.
 133  */
 134
 135 #include <sys/signal.h>
 136 #include <unistd.h>
 137
 138 #include <string>
 139
 140 #include "arch/arm/decoder.hh"
 141 #include "arch/arm/pagetable.hh"
 142 #include "arch/arm/registers.hh"
 143 #include "arch/arm/remote_gdb.hh"
 144 #include "arch/arm/system.hh"
 145 #include "arch/arm/utility.hh"
 146 #include "arch/arm/vtophys.hh"
 147 #include "base/chunk_generator.hh"
 148 #include "base/intmath.hh"
 149 #include "base/remote_gdb.hh"
 150 #include "base/socket.hh"
 151 #include "base/trace.hh"
 152 #include "cpu/static_inst.hh"
 153 #include "cpu/thread_context.hh"
 154 #include "cpu/thread_state.hh"
 155 #include "debug/GDBAcc.hh"
 156 #include "debug/GDBMisc.hh"
 157 #include "mem/page_table.hh"
 158 #include "mem/physical.hh"
 159 #include "mem/port.hh"
 160 #include "sim/full_system.hh"
 161 #include "sim/system.hh"
 162
 163 using namespace std;
 164 using namespace ArmISA;
 165
 166 RemoteGDB::RemoteGDB(System *_system, ThreadContext *tc)
 167     : BaseRemoteGDB(_system, tc)
 168 {
 169 }
 170
 171 /*
 172  * Determine if the mapping at va..(va+len) is valid.
 173  */
 174 bool
 175 RemoteGDB::acc(Addr va, size_t len)
 176 {
 177     if (FullSystem) {
 178         for (ChunkGenerator gen(va, len, PageBytes); !gen.done(); gen.next()) {
 179             if (!virtvalid(context, gen.addr())) {
 180                 DPRINTF(GDBAcc, "acc:   %#x mapping is invalid\n", va);
 181                 return false;
 182             }
 183         }
 184
 185         DPRINTF(GDBAcc, "acc:   %#x mapping is valid\n", va);
 186         return true;
 187     } else {
 188         TlbEntry entry;
 189         //Check to make sure the first byte is mapped into the processes address
 190         //space.
 191         if (context->getProcessPtr()->pTable->lookup(va, entry))
 192             return true;
 193         return false;
 194     }
 195 }
 196
 197 void
 198 RemoteGDB::AArch64GdbRegCache::getRegs(ThreadContext *context)
 199 {
 200     DPRINTF(GDBAcc, "getRegs in remotegdb \n");
 201
 202     for (int i = 0; i < 31; ++i)
 203         r.x[i] = context->readIntReg(INTREG_X0 + i);
 204     r.spx = context->readIntReg(INTREG_SPX);
 205     r.pc = context->pcState().pc();
 206     r.cpsr = context->readMiscRegNoEffect(MISCREG_CPSR);
 207
 208     for (int i = 0; i < 32*4; i += 4) {
 209         r.v[i + 0] = context->readFloatRegBits(i + 2);
 210         r.v[i + 1] = context->readFloatRegBits(i + 3);
 211         r.v[i + 2] = context->readFloatRegBits(i + 0);
 212         r.v[i + 3] = context->readFloatRegBits(i + 1);
 213     }
 214 }
 215
 216 void
 217 RemoteGDB::AArch64GdbRegCache::setRegs(ThreadContext *context) const
 218 {
 219     DPRINTF(GDBAcc, "setRegs in remotegdb \n");
 220
 221     for (int i = 0; i < 31; ++i)
 222         context->setIntReg(INTREG_X0 + i, r.x[i]);
 223     context->pcState(r.pc);
 224     context->setMiscRegNoEffect(MISCREG_CPSR, r.cpsr);
 225     // Update the stack pointer. This should be done after
 226     // updating CPSR/PSTATE since that might affect how SPX gets
 227     // mapped.
 228     context->setIntReg(INTREG_SPX, r.spx);
 229
 230     for (int i = 0; i < 32*4; i += 4) {
 231         context->setFloatRegBits(i + 2, r.v[i + 0]);
 232         context->setFloatRegBits(i + 3, r.v[i + 1]);
 233         context->setFloatRegBits(i + 0, r.v[i + 2]);
 234         context->setFloatRegBits(i + 1, r.v[i + 3]);
 235     }
 236 }
 237
 238 void
 239 RemoteGDB::AArch32GdbRegCache::getRegs(ThreadContext *context)
 240 {
 241     DPRINTF(GDBAcc, "getRegs in remotegdb \n");
 242
 243     r.gpr[0] = context->readIntReg(INTREG_R0);
 244     r.gpr[1] = context->readIntReg(INTREG_R1);
 245     r.gpr[2] = context->readIntReg(INTREG_R2);
 246     r.gpr[3] = context->readIntReg(INTREG_R3);
 247     r.gpr[4] = context->readIntReg(INTREG_R4);
 248     r.gpr[5] = context->readIntReg(INTREG_R5);
 249     r.gpr[6] = context->readIntReg(INTREG_R6);
 250     r.gpr[7] = context->readIntReg(INTREG_R7);
 251     r.gpr[8] = context->readIntReg(INTREG_R8);
 252     r.gpr[9] = context->readIntReg(INTREG_R9);
 253     r.gpr[10] = context->readIntReg(INTREG_R10);
 254     r.gpr[11] = context->readIntReg(INTREG_R11);
 255     r.gpr[12] = context->readIntReg(INTREG_R12);
 256     r.gpr[13] = context->readIntReg(INTREG_SP);
 257     r.gpr[14] = context->readIntReg(INTREG_LR);
 258     r.gpr[15] = context->pcState().pc();
 259
 260     // One day somebody will implement transfer of FPRs correctly.
 261     for (int i=0; i<8*3; i++) r.fpr[i] = 0;
 262
 263     r.fpscr = context->readMiscRegNoEffect(MISCREG_FPSCR);
 264     r.cpsr = context->readMiscRegNoEffect(MISCREG_CPSR);
 265 }
 266
 267 void
 268 RemoteGDB::AArch32GdbRegCache::setRegs(ThreadContext *context) const
 269 {
 270     DPRINTF(GDBAcc, "setRegs in remotegdb \n");
 271
 272     context->setIntReg(INTREG_R0, r.gpr[0]);
 273     context->setIntReg(INTREG_R1, r.gpr[1]);
 274     context->setIntReg(INTREG_R2, r.gpr[2]);
 275     context->setIntReg(INTREG_R3, r.gpr[3]);
 276     context->setIntReg(INTREG_R4, r.gpr[4]);
 277     context->setIntReg(INTREG_R5, r.gpr[5]);
 278     context->setIntReg(INTREG_R6, r.gpr[6]);
 279     context->setIntReg(INTREG_R7, r.gpr[7]);
 280     context->setIntReg(INTREG_R8, r.gpr[8]);
 281     context->setIntReg(INTREG_R9, r.gpr[9]);
 282     context->setIntReg(INTREG_R10, r.gpr[10]);
 283     context->setIntReg(INTREG_R11, r.gpr[11]);
 284     context->setIntReg(INTREG_R12, r.gpr[12]);
 285     context->setIntReg(INTREG_SP, r.gpr[13]);
 286     context->setIntReg(INTREG_LR, r.gpr[14]);
 287     context->pcState(r.gpr[15]);
 288
 289     // One day somebody will implement transfer of FPRs correctly.
 290
 291     context->setMiscReg(MISCREG_FPSCR, r.fpscr);
 292     context->setMiscRegNoEffect(MISCREG_CPSR, r.cpsr);
 293 }
 294
 295 RemoteGDB::BaseGdbRegCache*
 296 RemoteGDB::gdbRegs()
 297 {
 298     if (inAArch64(context))
 299         return new AArch64GdbRegCache(this);
 300     else
 301         return new AArch32GdbRegCache(this);
 302 }