remote_gdb.cc revision 12031
1/* 2 * Copyright 2015 LabWare 3 * Copyright 2014 Google, Inc. 4 * Copyright (c) 2002-2005 The Regents of The University of Michigan 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions are 9 * met: redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer; 11 * redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution; 14 * neither the name of the copyright holders nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 * 30 * Authors: Nathan Binkert 31 * Boris Shingarov 32 */ 33 34/* 35 * Copyright (c) 1990, 1993 The Regents of the University of California 36 * All rights reserved 37 * 38 * This software was developed by the Computer Systems Engineering group 39 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 40 * contributed to Berkeley. 41 * 42 * All advertising materials mentioning features or use of this software 43 * must display the following acknowledgement: 44 * This product includes software developed by the University of 45 * California, Lawrence Berkeley Laboratories. 46 * 47 * Redistribution and use in source and binary forms, with or without 48 * modification, are permitted provided that the following conditions 49 * are met: 50 * 1. Redistributions of source code must retain the above copyright 51 * notice, this list of conditions and the following disclaimer. 52 * 2. Redistributions in binary form must reproduce the above copyright 53 * notice, this list of conditions and the following disclaimer in the 54 * documentation and/or other materials provided with the distribution. 55 * 3. 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, Berkeley and its contributors. 59 * 4. Neither the name of the University nor the names of its contributors 60 * may be used to endorse or promote products derived from this software 61 * without specific prior written permission. 62 * 63 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 64 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 65 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 66 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 67 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 68 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 69 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 70 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 71 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 72 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 73 * SUCH DAMAGE. 74 * 75 * @(#)kgdb_stub.c 8.4 (Berkeley) 1/12/94 76 */ 77 78/*- 79 * Copyright (c) 2001 The NetBSD Foundation, Inc. 80 * All rights reserved. 81 * 82 * This code is derived from software contributed to The NetBSD Foundation 83 * by Jason R. Thorpe. 84 * 85 * Redistribution and use in source and binary forms, with or without 86 * modification, are permitted provided that the following conditions 87 * are met: 88 * 1. Redistributions of source code must retain the above copyright 89 * notice, this list of conditions and the following disclaimer. 90 * 2. Redistributions in binary form must reproduce the above copyright 91 * notice, this list of conditions and the following disclaimer in the 92 * documentation and/or other materials provided with the distribution. 93 * 3. All advertising materials mentioning features or use of this software 94 * must display the following acknowledgement: 95 * This product includes software developed by the NetBSD 96 * Foundation, Inc. and its contributors. 97 * 4. Neither the name of The NetBSD Foundation nor the names of its 98 * contributors may be used to endorse or promote products derived 99 * from this software without specific prior written permission. 100 * 101 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 102 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 103 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 104 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 105 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 106 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 107 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 108 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 109 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 110 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 111 * POSSIBILITY OF SUCH DAMAGE. 112 */ 113 114/* 115 * $NetBSD: kgdb_stub.c,v 1.8 2001/07/07 22:58:00 wdk Exp $ 116 * 117 * Taken from NetBSD 118 * 119 * "Stub" to allow remote cpu to debug over a serial line using gdb. 120 */ 121 122#include "arch/sparc/remote_gdb.hh" 123 124#include <sys/signal.h> 125#include <unistd.h> 126 127#include <csignal> 128#include <string> 129 130#include "arch/vtophys.hh" 131#include "base/intmath.hh" 132#include "base/remote_gdb.hh" 133#include "base/socket.hh" 134#include "base/trace.hh" 135#include "cpu/static_inst.hh" 136#include "cpu/thread_context.hh" 137#include "debug/GDBAcc.hh" 138#include "debug/GDBRead.hh" 139#include "mem/page_table.hh" 140#include "mem/physical.hh" 141#include "mem/port.hh" 142#include "sim/byteswap.hh" 143#include "sim/full_system.hh" 144#include "sim/process.hh" 145#include "sim/system.hh" 146 147using namespace std; 148using namespace SparcISA; 149 150RemoteGDB::RemoteGDB(System *_system, ThreadContext *c) 151 : BaseRemoteGDB(_system, c), regCache32(this), regCache64(this) 152{} 153 154/////////////////////////////////////////////////////////// 155// RemoteGDB::acc 156// 157// Determine if the mapping at va..(va+len) is valid. 158// 159bool 160RemoteGDB::acc(Addr va, size_t len) 161{ 162 //@Todo In NetBSD, this function checks if all addresses 163 // from va to va + len have valid page map entries. Not 164 // sure how this will work for other OSes or in general. 165 if (FullSystem) { 166 if (va) 167 return true; 168 return false; 169 } else { 170 TlbEntry entry; 171 // Check to make sure the first byte is mapped into the processes 172 // address space. 173 if (context->getProcessPtr()->pTable->lookup(va, entry)) 174 return true; 175 return false; 176 } 177} 178 179void 180RemoteGDB::SPARCGdbRegCache::getRegs(ThreadContext *context) 181{ 182 DPRINTF(GDBAcc, "getRegs in remotegdb \n"); 183 for (int i = 0; i < 32; i++) r.gpr[i] = htobe((uint32_t)context->readIntReg(i)); 184 PCState pc = context->pcState(); 185 r.pc = htobe((uint32_t)pc.pc()); 186 r.npc = htobe((uint32_t)pc.npc()); 187 r.y = htobe((uint32_t)context->readIntReg(NumIntArchRegs + 1)); 188 PSTATE pstate = context->readMiscReg(MISCREG_PSTATE); 189 r.psr = htobe((uint32_t)pstate); 190 r.fsr = htobe((uint32_t)context->readMiscReg(MISCREG_FSR)); 191 r.csr = htobe((uint32_t)context->readIntReg(NumIntArchRegs + 2)); 192} 193 194void 195RemoteGDB::SPARC64GdbRegCache::getRegs(ThreadContext *context) 196{ 197 DPRINTF(GDBAcc, "getRegs in remotegdb \n"); 198 for (int i = 0; i < 32; i++) r.gpr[i] = htobe(context->readIntReg(i)); 199 for (int i = 0; i < 32; i++) r.fpr[i] = 0; 200 PCState pc = context->pcState(); 201 r.pc = htobe(pc.pc()); 202 r.npc = htobe(pc.npc()); 203 r.fsr = htobe(context->readMiscReg(MISCREG_FSR)); 204 r.fprs = htobe(context->readMiscReg(MISCREG_FPRS)); 205 r.y = htobe(context->readIntReg(NumIntArchRegs + 1)); 206 PSTATE pstate = context->readMiscReg(MISCREG_PSTATE); 207 r.state = htobe( 208 context->readMiscReg(MISCREG_CWP) | 209 pstate << 8 | 210 context->readMiscReg(MISCREG_ASI) << 24 | 211 context->readIntReg(NumIntArchRegs + 2) << 32); 212} 213 214void 215RemoteGDB::SPARCGdbRegCache::setRegs(ThreadContext *context) const 216{ 217 for (int i = 0; i < 32; i++) context->setIntReg(i, r.gpr[i]); 218 PCState pc; 219 pc.pc(r.pc); 220 pc.npc(r.npc); 221 pc.nnpc(pc.npc() + sizeof(MachInst)); 222 pc.upc(0); 223 pc.nupc(1); 224 context->pcState(pc); 225 // Floating point registers are left at 0 in netbsd 226 // All registers other than the pc, npc and int regs 227 // are ignored as well. 228} 229 230void 231RemoteGDB::SPARC64GdbRegCache::setRegs(ThreadContext *context) const 232{ 233 for (int i = 0; i < 32; i++) context->setIntReg(i, r.gpr[i]); 234 PCState pc; 235 pc.pc(r.pc); 236 pc.npc(r.npc); 237 pc.nnpc(pc.npc() + sizeof(MachInst)); 238 pc.upc(0); 239 pc.nupc(1); 240 context->pcState(pc); 241 // Floating point registers are left at 0 in netbsd 242 // All registers other than the pc, npc and int regs 243 // are ignored as well. 244} 245 246 247RemoteGDB::BaseGdbRegCache* 248RemoteGDB::gdbRegs() 249{ 250 PSTATE pstate = context->readMiscReg(MISCREG_PSTATE); 251 if (pstate.am) { 252 return ®Cache32; 253 } else { 254 return ®Cache64; 255 } 256} 257