remote_gdb.cc revision 5107
1/* 2 * Copyright (c) 2002-2005 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Nathan Binkert 29 */ 30 31/* 32 * Copyright (c) 1990, 1993 33 * The Regents of the University of California. All rights reserved. 34 * 35 * This software was developed by the Computer Systems Engineering group 36 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 37 * contributed to Berkeley. 38 * 39 * All advertising materials mentioning features or use of this software 40 * must display the following acknowledgement: 41 * This product includes software developed by the University of 42 * California, Lawrence Berkeley Laboratories. 43 * 44 * Redistribution and use in source and binary forms, with or without 45 * modification, are permitted provided that the following conditions 46 * are met: 47 * 1. Redistributions of source code must retain the above copyright 48 * notice, this list of conditions and the following disclaimer. 49 * 2. Redistributions in binary form must reproduce the above copyright 50 * notice, this list of conditions and the following disclaimer in the 51 * documentation and/or other materials provided with the distribution. 52 * 3. All advertising materials mentioning features or use of this software 53 * must display the following acknowledgement: 54 * This product includes software developed by the University of 55 * California, Berkeley and its contributors. 56 * 4. Neither the name of the University nor the names of its contributors 57 * may be used to endorse or promote products derived from this software 58 * without specific prior written permission. 59 * 60 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 61 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 62 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 63 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 64 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 65 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 66 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 67 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 68 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 69 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 70 * SUCH DAMAGE. 71 * 72 * @(#)kgdb_stub.c 8.4 (Berkeley) 1/12/94 73 */ 74 75/*- 76 * Copyright (c) 2001 The NetBSD Foundation, Inc. 77 * All rights reserved. 78 * 79 * This code is derived from software contributed to The NetBSD Foundation 80 * by Jason R. Thorpe. 81 * 82 * Redistribution and use in source and binary forms, with or without 83 * modification, are permitted provided that the following conditions 84 * are met: 85 * 1. Redistributions of source code must retain the above copyright 86 * notice, this list of conditions and the following disclaimer. 87 * 2. Redistributions in binary form must reproduce the above copyright 88 * notice, this list of conditions and the following disclaimer in the 89 * documentation and/or other materials provided with the distribution. 90 * 3. All advertising materials mentioning features or use of this software 91 * must display the following acknowledgement: 92 * This product includes software developed by the NetBSD 93 * Foundation, Inc. and its contributors. 94 * 4. Neither the name of The NetBSD Foundation nor the names of its 95 * contributors may be used to endorse or promote products derived 96 * from this software without specific prior written permission. 97 * 98 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 99 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 100 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 101 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 102 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 103 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 104 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 105 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 106 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 107 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 108 * POSSIBILITY OF SUCH DAMAGE. 109 */ 110 111/* 112 * $NetBSD: kgdb_stub.c,v 1.8 2001/07/07 22:58:00 wdk Exp $ 113 * 114 * Taken from NetBSD 115 * 116 * "Stub" to allow remote cpu to debug over a serial line using gdb. 117 */ 118 119#include <sys/signal.h> 120 121#include <string> 122#include <unistd.h> 123 124#include "arch/vtophys.hh" 125#include "arch/sparc/remote_gdb.hh" 126#include "base/intmath.hh" 127#include "base/remote_gdb.hh" 128#include "base/socket.hh" 129#include "base/trace.hh" 130#include "config/full_system.hh" 131#include "cpu/thread_context.hh" 132#include "cpu/static_inst.hh" 133#include "mem/page_table.hh" 134#include "mem/physical.hh" 135#include "mem/port.hh" 136#include "sim/process.hh" 137#include "sim/system.hh" 138 139using namespace std; 140using namespace TheISA; 141 142RemoteGDB::RemoteGDB(System *_system, ThreadContext *c) 143 : BaseRemoteGDB(_system, c, NumGDBRegs), nextBkpt(0) 144{} 145 146/////////////////////////////////////////////////////////// 147// RemoteGDB::acc 148// 149// Determine if the mapping at va..(va+len) is valid. 150// 151bool 152RemoteGDB::acc(Addr va, size_t len) 153{ 154 //@Todo In NetBSD, this function checks if all addresses 155 //from va to va + len have valid page map entries. Not 156 //sure how this will work for other OSes or in general. 157#if FULL_SYSTEM 158 if (va) 159 return true; 160 return false; 161#else 162 TlbEntry entry; 163 //Check to make sure the first byte is mapped into the processes address 164 //space. 165 if (context->getProcessPtr()->pTable->lookup(va, entry)) 166 return true; 167 return false; 168#endif 169} 170 171/////////////////////////////////////////////////////////// 172// RemoteGDB::getregs 173// 174// Translate the kernel debugger register format into 175// the GDB register format. 176void 177RemoteGDB::getregs() 178{ 179 memset(gdbregs.regs, 0, gdbregs.size); 180 181 if (context->readMiscReg(MISCREG_PSTATE) & 182 PSTATE::am) { 183 uint32_t *regs; 184 regs = (uint32_t*)gdbregs.regs; 185 regs[Reg32Pc] = htobe((uint32_t)context->readPC()); 186 regs[Reg32Npc] = htobe((uint32_t)context->readNextPC()); 187 for(int x = RegG0; x <= RegI0 + 7; x++) 188 regs[x] = htobe((uint32_t)context->readIntReg(x - RegG0)); 189 190 regs[Reg32Y] = htobe((uint32_t)context->readIntReg(NumIntArchRegs + 1)); 191 regs[Reg32Psr] = htobe((uint32_t)context->readMiscReg(MISCREG_PSTATE)); 192 regs[Reg32Fsr] = htobe((uint32_t)context->readMiscReg(MISCREG_FSR)); 193 regs[Reg32Csr] = htobe((uint32_t)context->readIntReg(NumIntArchRegs + 2)); 194 } else { 195 gdbregs.regs[RegPc] = htobe(context->readPC()); 196 gdbregs.regs[RegNpc] = htobe(context->readNextPC()); 197 for(int x = RegG0; x <= RegI0 + 7; x++) 198 gdbregs.regs[x] = htobe(context->readIntReg(x - RegG0)); 199 200 gdbregs.regs[RegFsr] = htobe(context->readMiscReg(MISCREG_FSR)); 201 gdbregs.regs[RegFprs] = htobe(context->readMiscReg(MISCREG_FPRS)); 202 gdbregs.regs[RegY] = htobe(context->readIntReg(NumIntArchRegs + 1)); 203 gdbregs.regs[RegState] = htobe( 204 context->readMiscReg(MISCREG_CWP) | 205 context->readMiscReg(MISCREG_PSTATE) << 8 | 206 context->readMiscReg(MISCREG_ASI) << 24 | 207 context->readIntReg(NumIntArchRegs + 2) << 32); 208 } 209 210 DPRINTF(GDBRead, "PC=%#x\n", gdbregs.regs[RegPc]); 211 212 //Floating point registers are left at 0 in netbsd 213 //All registers other than the pc, npc and int regs 214 //are ignored as well. 215} 216 217/////////////////////////////////////////////////////////// 218// RemoteGDB::setregs 219// 220// Translate the GDB register format into the kernel 221// debugger register format. 222// 223void 224RemoteGDB::setregs() 225{ 226 context->setPC(gdbregs.regs[RegPc]); 227 context->setNextPC(gdbregs.regs[RegNpc]); 228 for(int x = RegG0; x <= RegI0 + 7; x++) 229 context->setIntReg(x - RegG0, gdbregs.regs[x]); 230 //Only the integer registers, pc and npc are set in netbsd 231} 232 233void 234RemoteGDB::clearSingleStep() 235{ 236 if (nextBkpt) 237 clearTempBreakpoint(nextBkpt); 238} 239 240void 241RemoteGDB::setSingleStep() 242{ 243 nextBkpt = context->readNextPC(); 244 setTempBreakpoint(nextBkpt); 245} 246