remote_gdb.cc revision 12031:46116545e745
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) 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 * Deyuan Guo 45 * Boris Shingarov 46 */ 47 48/* 49 * Copyright (c) 1990, 1993 The Regents of the University of California 50 * All rights reserved 51 * 52 * This software was developed by the Computer Systems Engineering group 53 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 54 * contributed to Berkeley. 55 * 56 * All advertising materials mentioning features or use of this software 57 * must display the following acknowledgement: 58 * This product includes software developed by the University of 59 * California, Lawrence Berkeley Laboratories. 60 * 61 * Redistribution and use in source and binary forms, with or without 62 * modification, are permitted provided that the following conditions 63 * are met: 64 * 1. Redistributions of source code must retain the above copyright 65 * notice, this list of conditions and the following disclaimer. 66 * 2. Redistributions in binary form must reproduce the above copyright 67 * notice, this list of conditions and the following disclaimer in the 68 * documentation and/or other materials provided with the distribution. 69 * 3. All advertising materials mentioning features or use of this software 70 * must display the following acknowledgement: 71 * This product includes software developed by the University of 72 * California, Berkeley and its contributors. 73 * 4. Neither the name of the University nor the names of its contributors 74 * may be used to endorse or promote products derived from this software 75 * without specific prior written permission. 76 * 77 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 78 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 79 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 80 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 81 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 82 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 83 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 84 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 85 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 86 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 87 * SUCH DAMAGE. 88 * 89 * @(#)kgdb_stub.c 8.4 (Berkeley) 1/12/94 90 */ 91 92/*- 93 * Copyright (c) 2001 The NetBSD Foundation, Inc. 94 * All rights reserved. 95 * 96 * This code is derived from software contributed to The NetBSD Foundation 97 * by Jason R. Thorpe. 98 * 99 * Redistribution and use in source and binary forms, with or without 100 * modification, are permitted provided that the following conditions 101 * are met: 102 * 1. Redistributions of source code must retain the above copyright 103 * notice, this list of conditions and the following disclaimer. 104 * 2. Redistributions in binary form must reproduce the above copyright 105 * notice, this list of conditions and the following disclaimer in the 106 * documentation and/or other materials provided with the distribution. 107 * 3. All advertising materials mentioning features or use of this software 108 * must display the following acknowledgement: 109 * This product includes software developed by the NetBSD 110 * Foundation, Inc. and its contributors. 111 * 4. Neither the name of The NetBSD Foundation nor the names of its 112 * contributors may be used to endorse or promote products derived 113 * from this software without specific prior written permission. 114 * 115 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 116 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 117 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 118 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 119 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 120 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 121 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 122 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 123 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 124 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 125 * POSSIBILITY OF SUCH DAMAGE. 126 */ 127 128/* 129 * $NetBSD: kgdb_stub.c,v 1.8 2001/07/07 22:58:00 wdk Exp $ 130 * 131 * Taken from NetBSD 132 * 133 * "Stub" to allow remote cpu to debug over a serial line using gdb. 134 */ 135 136 137#include "arch/power/remote_gdb.hh" 138 139#include <sys/signal.h> 140#include <unistd.h> 141 142#include <string> 143 144#include "arch/power/vtophys.hh" 145#include "cpu/thread_state.hh" 146#include "debug/GDBAcc.hh" 147#include "debug/GDBMisc.hh" 148#include "mem/page_table.hh" 149#include "sim/byteswap.hh" 150 151using namespace std; 152using namespace PowerISA; 153 154RemoteGDB::RemoteGDB(System *_system, ThreadContext *tc) 155 : BaseRemoteGDB(_system, tc), regCache(this) 156{ 157} 158 159/* 160 * Determine if the mapping at va..(va+len) is valid. 161 */ 162bool 163RemoteGDB::acc(Addr va, size_t len) 164{ 165 TlbEntry entry; 166 //Check to make sure the first byte is mapped into the processes address 167 //space. At the time of this writing, the acc() check is used when 168 //processing the MemR/MemW packets before actually asking the translating 169 //port proxy to read/writeBlob. I (bgs) am not convinced the first byte 170 //check is enough. 171 if (FullSystem) 172 panic("acc not implemented for POWER FS!"); 173 else 174 return context->getProcessPtr()->pTable->lookup(va, entry); 175} 176 177void 178RemoteGDB::PowerGdbRegCache::getRegs(ThreadContext *context) 179{ 180 DPRINTF(GDBAcc, "getRegs in remotegdb \n"); 181 182 // Default order on 32-bit PowerPC: 183 // R0-R31 (32-bit each), F0-F31 (64-bit IEEE754 double), 184 // PC, MSR, CR, LR, CTR, XER (32-bit each) 185 186 for (int i = 0; i < NumIntArchRegs; i++) 187 r.gpr[i] = htobe((uint32_t)context->readIntReg(i)); 188 189 for (int i = 0; i < NumFloatArchRegs; i++) 190 r.fpr[i] = context->readFloatRegBits(i); 191 192 r.pc = htobe((uint32_t)context->pcState().pc()); 193 r.msr = 0; // Is MSR modeled? 194 r.cr = htobe((uint32_t)context->readIntReg(INTREG_CR)); 195 r.lr = htobe((uint32_t)context->readIntReg(INTREG_LR)); 196 r.ctr = htobe((uint32_t)context->readIntReg(INTREG_CTR)); 197 r.xer = htobe((uint32_t)context->readIntReg(INTREG_XER)); 198} 199 200void 201RemoteGDB::PowerGdbRegCache::setRegs(ThreadContext *context) const 202{ 203 DPRINTF(GDBAcc, "setRegs in remotegdb \n"); 204 205 for (int i = 0; i < NumIntArchRegs; i++) 206 context->setIntReg(i, betoh(r.gpr[i])); 207 208 for (int i = 0; i < NumFloatArchRegs; i++) 209 context->setFloatRegBits(i, r.fpr[i]); 210 211 context->pcState(betoh(r.pc)); 212 // Is MSR modeled? 213 context->setIntReg(INTREG_CR, betoh(r.cr)); 214 context->setIntReg(INTREG_LR, betoh(r.lr)); 215 context->setIntReg(INTREG_CTR, betoh(r.ctr)); 216 context->setIntReg(INTREG_XER, betoh(r.xer)); 217} 218 219RemoteGDB::BaseGdbRegCache* 220RemoteGDB::gdbRegs() { 221 return ®Cache; 222} 223 224