remote_gdb.cc revision 13611:c8b7847b4171
112855Sgabeblack@google.com/* 212855Sgabeblack@google.com * Copyright 2014 Google, Inc. 312855Sgabeblack@google.com * Copyright (c) 2002-2005 The Regents of The University of Michigan 412855Sgabeblack@google.com * All rights reserved. 512855Sgabeblack@google.com * 612855Sgabeblack@google.com * Redistribution and use in source and binary forms, with or without 712855Sgabeblack@google.com * modification, are permitted provided that the following conditions are 812855Sgabeblack@google.com * met: redistributions of source code must retain the above copyright 912855Sgabeblack@google.com * notice, this list of conditions and the following disclaimer; 1012855Sgabeblack@google.com * redistributions in binary form must reproduce the above copyright 1112855Sgabeblack@google.com * notice, this list of conditions and the following disclaimer in the 1212855Sgabeblack@google.com * documentation and/or other materials provided with the distribution; 1312855Sgabeblack@google.com * neither the name of the copyright holders nor the names of its 1412855Sgabeblack@google.com * contributors may be used to endorse or promote products derived from 1512855Sgabeblack@google.com * this software without specific prior written permission. 1612855Sgabeblack@google.com * 1712855Sgabeblack@google.com * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 1812855Sgabeblack@google.com * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 1912855Sgabeblack@google.com * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 2012855Sgabeblack@google.com * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 2112855Sgabeblack@google.com * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 2212855Sgabeblack@google.com * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 2312855Sgabeblack@google.com * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2412855Sgabeblack@google.com * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2512855Sgabeblack@google.com * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2612855Sgabeblack@google.com * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 2712855Sgabeblack@google.com * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2812855Sgabeblack@google.com * 2912855Sgabeblack@google.com * Authors: Nathan Binkert 3012855Sgabeblack@google.com */ 3112855Sgabeblack@google.com 3212855Sgabeblack@google.com/* 3312855Sgabeblack@google.com * Copyright (c) 1990, 1993 The Regents of the University of California 3412855Sgabeblack@google.com * All rights reserved. 3512855Sgabeblack@google.com * 3612855Sgabeblack@google.com * This software was developed by the Computer Systems Engineering group 3712855Sgabeblack@google.com * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 3812855Sgabeblack@google.com * contributed to Berkeley. 3912855Sgabeblack@google.com * 4012855Sgabeblack@google.com * All advertising materials mentioning features or use of this software 4112855Sgabeblack@google.com * must display the following acknowledgement: 4212855Sgabeblack@google.com * This product includes software developed by the University of 4312855Sgabeblack@google.com * California, Lawrence Berkeley Laboratories. 4412855Sgabeblack@google.com * 4512855Sgabeblack@google.com * Redistribution and use in source and binary forms, with or without 4612855Sgabeblack@google.com * modification, are permitted provided that the following conditions 4712855Sgabeblack@google.com * are met: 4812855Sgabeblack@google.com * 1. 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IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 6512855Sgabeblack@google.com * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 6612855Sgabeblack@google.com * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 6712855Sgabeblack@google.com * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 6812855Sgabeblack@google.com * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 6912855Sgabeblack@google.com * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 7012855Sgabeblack@google.com * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 7112855Sgabeblack@google.com * SUCH DAMAGE. 7212855Sgabeblack@google.com * 7312855Sgabeblack@google.com * @(#)kgdb_stub.c 8.4 (Berkeley) 1/12/94 7412855Sgabeblack@google.com */ 7512855Sgabeblack@google.com 7612855Sgabeblack@google.com/*- 7712855Sgabeblack@google.com * Copyright (c) 2001 The NetBSD Foundation, Inc. 7812855Sgabeblack@google.com * All rights reserved. 7912855Sgabeblack@google.com * 8012855Sgabeblack@google.com * This code is derived from software contributed to The NetBSD Foundation 8112855Sgabeblack@google.com * by Jason R. Thorpe. 8212855Sgabeblack@google.com * 8312855Sgabeblack@google.com * Redistribution and use in source and binary forms, with or without 8412855Sgabeblack@google.com * modification, are permitted provided that the following conditions 8512855Sgabeblack@google.com * are met: 8612855Sgabeblack@google.com * 1. Redistributions of source code must retain the above copyright 8712855Sgabeblack@google.com * notice, this list of conditions and the following disclaimer. 8812855Sgabeblack@google.com * 2. Redistributions in binary form must reproduce the above copyright 8912855Sgabeblack@google.com * notice, this list of conditions and the following disclaimer in the 9012855Sgabeblack@google.com * documentation and/or other materials provided with the distribution. 9112855Sgabeblack@google.com * 3. All advertising materials mentioning features or use of this software 9212855Sgabeblack@google.com * must display the following acknowledgement: 9312855Sgabeblack@google.com * This product includes software developed by the NetBSD 9412855Sgabeblack@google.com * Foundation, Inc. and its contributors. 9512855Sgabeblack@google.com * 4. Neither the name of The NetBSD Foundation nor the names of its 9612855Sgabeblack@google.com * contributors may be used to endorse or promote products derived 9712855Sgabeblack@google.com * from this software without specific prior written permission. 9812855Sgabeblack@google.com * 9912855Sgabeblack@google.com * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 10012855Sgabeblack@google.com * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 10112855Sgabeblack@google.com * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 102 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 103 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 104 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 105 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 106 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 107 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 108 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 109 * POSSIBILITY OF SUCH DAMAGE. 110 */ 111 112/* 113 * $NetBSD: kgdb_stub.c,v 1.8 2001/07/07 22:58:00 wdk Exp $ 114 * 115 * Taken from NetBSD 116 * 117 * "Stub" to allow remote cpu to debug over a serial line using gdb. 118 */ 119 120#include "arch/alpha/remote_gdb.hh" 121 122#include <sys/signal.h> 123#include <unistd.h> 124 125#include <string> 126 127#include "arch/alpha/decoder.hh" 128#include "arch/alpha/regredir.hh" 129#include "arch/alpha/utility.hh" 130#include "arch/alpha/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/GDBMisc.hh" 139#include "mem/physical.hh" 140#include "mem/port.hh" 141#include "sim/full_system.hh" 142#include "sim/system.hh" 143 144using namespace std; 145using namespace AlphaISA; 146 147RemoteGDB::RemoteGDB(System *_system, ThreadContext *tc, int _port) 148 : BaseRemoteGDB(_system, tc, _port) 149{ 150 warn_once("Breakpoints do not work in Alpha PAL mode.\n" 151 " See PCEventQueue::doService() in cpu/pc_event.cc.\n"); 152} 153 154/* 155 * Determine if the mapping at va..(va+len) is valid. 156 */ 157bool 158RemoteGDB::acc(Addr va, size_t len) 159{ 160 if (!FullSystem) 161 panic("acc function needs to be rewritten for SE mode\n"); 162 163 Addr last_va; 164 165 va = TruncPage(va); 166 last_va = RoundPage(va + len); 167 168 do { 169 if (IsK0Seg(va)) { 170 if (va < (K0SegBase + system()->memSize())) { 171 DPRINTF(GDBAcc, "acc: Mapping is valid K0SEG <= " 172 "%#x < K0SEG + size\n", va); 173 return true; 174 } else { 175 DPRINTF(GDBAcc, "acc: Mapping invalid %#x " 176 "> K0SEG + size\n", va); 177 return false; 178 } 179 } 180 181 /** 182 * This code says that all accesses to palcode (instruction 183 * and data) are valid since there isn't a va->pa mapping 184 * because palcode is accessed physically. At some point this 185 * should probably be cleaned up but there is no easy way to 186 * do it. 187 */ 188 189 if (PcPAL(va) || va < 0x10000) 190 return true; 191 192 Addr ptbr = context()->readMiscRegNoEffect(IPR_PALtemp20); 193 PageTableEntry pte = 194 kernel_pte_lookup(context()->getPhysProxy(), ptbr, va); 195 if (!pte.valid()) { 196 DPRINTF(GDBAcc, "acc: %#x pte is invalid\n", va); 197 return false; 198 } 199 va += PageBytes; 200 } while (va < last_va); 201 202 DPRINTF(GDBAcc, "acc: %#x mapping is valid\n", va); 203 return true; 204} 205 206void 207RemoteGDB::AlphaGdbRegCache::getRegs(ThreadContext *context) 208{ 209 DPRINTF(GDBAcc, "getRegs in remotegdb \n"); 210 211 r.pc = context->pcState().pc(); 212 213 if (PcPAL(r.pc)) { 214 for (int i = 0; i < 32; ++i) 215 r.gpr[i] = context->readIntReg(reg_redir[i]); 216 } else { 217 for (int i = 0; i < 32; ++i) 218 r.gpr[i] = context->readIntReg(i); 219 } 220 221 for (int i = 0; i < 32; ++i) 222#ifdef KGDB_FP_REGS 223 r.fpr[i] = context->readFloatReg(i); 224#else 225 r.fpr[i] = 0; 226#endif 227} 228 229void 230RemoteGDB::AlphaGdbRegCache::setRegs(ThreadContext *context) const 231{ 232 DPRINTF(GDBAcc, "setRegs in remotegdb \n"); 233 234 if (PcPAL(r.pc)) { 235 for (int i = 0; i < 32; ++i) { 236 context->setIntReg(reg_redir[i], r.gpr[i]); 237 } 238 } else { 239 for (int i = 0; i < 32; ++i) { 240 context->setIntReg(i, r.gpr[i]); 241 } 242 } 243 244#ifdef KGDB_FP_REGS 245 for (int i = 0; i < NumFloatArchRegs; ++i) { 246 context->setFloatReg(i, gdbregs.regs64[i + KGDB_REG_F0]); 247 } 248#endif 249 context->pcState(r.pc); 250} 251 252 253BaseGdbRegCache* 254RemoteGDB::gdbRegs() 255{ 256 return new AlphaGdbRegCache(this); 257} 258 259