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, int _port) 151 : BaseRemoteGDB(_system, c, _port), 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 return va != 0; 167 } else { 168 // Check to make sure the first byte is mapped into the processes 169 // address space. 170 return context()->getProcessPtr()->pTable->lookup(va) != nullptr; 171 } 172} 173 174void 175RemoteGDB::SPARCGdbRegCache::getRegs(ThreadContext *context) 176{ 177 DPRINTF(GDBAcc, "getRegs in remotegdb \n"); 178 for (int i = 0; i < 32; i++) r.gpr[i] = htobe((uint32_t)context->readIntReg(i)); 179 PCState pc = context->pcState(); 180 r.pc = htobe((uint32_t)pc.pc()); 181 r.npc = htobe((uint32_t)pc.npc()); 182 r.y = htobe((uint32_t)context->readIntReg(NumIntArchRegs + 1)); 183 PSTATE pstate = context->readMiscReg(MISCREG_PSTATE); 184 r.psr = htobe((uint32_t)pstate); 185 r.fsr = htobe((uint32_t)context->readMiscReg(MISCREG_FSR)); 186 r.csr = htobe((uint32_t)context->readIntReg(NumIntArchRegs + 2)); 187} 188 189void 190RemoteGDB::SPARC64GdbRegCache::getRegs(ThreadContext *context) 191{ 192 DPRINTF(GDBAcc, "getRegs in remotegdb \n"); 193 for (int i = 0; i < 32; i++) r.gpr[i] = htobe(context->readIntReg(i)); 194 for (int i = 0; i < 32; i++) r.fpr[i] = 0; 195 PCState pc = context->pcState(); 196 r.pc = htobe(pc.pc()); 197 r.npc = htobe(pc.npc()); 198 r.fsr = htobe(context->readMiscReg(MISCREG_FSR)); 199 r.fprs = htobe(context->readMiscReg(MISCREG_FPRS)); 200 r.y = htobe(context->readIntReg(NumIntArchRegs + 1)); 201 PSTATE pstate = context->readMiscReg(MISCREG_PSTATE); 202 r.state = htobe( 203 context->readMiscReg(MISCREG_CWP) | 204 pstate << 8 | 205 context->readMiscReg(MISCREG_ASI) << 24 | 206 context->readIntReg(NumIntArchRegs + 2) << 32); 207} 208 209void 210RemoteGDB::SPARCGdbRegCache::setRegs(ThreadContext *context) const 211{ 212 for (int i = 0; i < 32; i++) context->setIntReg(i, r.gpr[i]); 213 PCState pc; 214 pc.pc(r.pc); 215 pc.npc(r.npc); 216 pc.nnpc(pc.npc() + sizeof(MachInst)); 217 pc.upc(0); 218 pc.nupc(1); 219 context->pcState(pc); 220 // Floating point registers are left at 0 in netbsd 221 // All registers other than the pc, npc and int regs 222 // are ignored as well. 223} 224 225void 226RemoteGDB::SPARC64GdbRegCache::setRegs(ThreadContext *context) const 227{ 228 for (int i = 0; i < 32; i++) context->setIntReg(i, r.gpr[i]); 229 PCState pc; 230 pc.pc(r.pc); 231 pc.npc(r.npc); 232 pc.nnpc(pc.npc() + sizeof(MachInst)); 233 pc.upc(0); 234 pc.nupc(1); 235 context->pcState(pc); 236 // Floating point registers are left at 0 in netbsd 237 // All registers other than the pc, npc and int regs 238 // are ignored as well. 239} 240 241 242BaseGdbRegCache* 243RemoteGDB::gdbRegs() 244{ 245 PSTATE pstate = context()->readMiscReg(MISCREG_PSTATE); 246 if (pstate.am) { 247 return ®Cache32; 248 } else { 249 return ®Cache64; 250 } 251} 252