remote_gdb.cc revision 12455
1/* 2 * Copyright 2015 LabWare 3 * Copyright 2014 Google Inc. 4 * Copyright (c) 2010, 2013, 2016 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 * Boris Shingarov 45 */ 46 47/* 48 * Copyright (c) 1990, 1993 The Regents of the University of California 49 * All rights reserved 50 * 51 * This software was developed by the Computer Systems Engineering group 52 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 53 * contributed to Berkeley. 54 * 55 * 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, Lawrence Berkeley Laboratories. 59 * 60 * Redistribution and use in source and binary forms, with or without 61 * modification, are permitted provided that the following conditions 62 * are met: 63 * 1. Redistributions of source code must retain the above copyright 64 * notice, this list of conditions and the following disclaimer. 65 * 2. Redistributions in binary form must reproduce the above copyright 66 * notice, this list of conditions and the following disclaimer in the 67 * documentation and/or other materials provided with the distribution. 68 * 3. All advertising materials mentioning features or use of this software 69 * must display the following acknowledgement: 70 * This product includes software developed by the University of 71 * California, Berkeley and its contributors. 72 * 4. Neither the name of the University nor the names of its contributors 73 * may be used to endorse or promote products derived from this software 74 * without specific prior written permission. 75 * 76 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 77 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 78 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 79 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 80 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 81 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 82 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 83 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 84 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 85 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 86 * SUCH DAMAGE. 87 * 88 * @(#)kgdb_stub.c 8.4 (Berkeley) 1/12/94 89 */ 90 91/*- 92 * Copyright (c) 2001 The NetBSD Foundation, Inc. 93 * All rights reserved. 94 * 95 * This code is derived from software contributed to The NetBSD Foundation 96 * by Jason R. Thorpe. 97 * 98 * Redistribution and use in source and binary forms, with or without 99 * modification, are permitted provided that the following conditions 100 * are met: 101 * 1. Redistributions of source code must retain the above copyright 102 * notice, this list of conditions and the following disclaimer. 103 * 2. Redistributions in binary form must reproduce the above copyright 104 * notice, this list of conditions and the following disclaimer in the 105 * documentation and/or other materials provided with the distribution. 106 * 3. All advertising materials mentioning features or use of this software 107 * must display the following acknowledgement: 108 * This product includes software developed by the NetBSD 109 * Foundation, Inc. and its contributors. 110 * 4. Neither the name of The NetBSD Foundation nor the names of its 111 * contributors may be used to endorse or promote products derived 112 * from this software without specific prior written permission. 113 * 114 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 115 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 116 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 117 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 118 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 119 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 120 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 121 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 122 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 123 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 124 * POSSIBILITY OF SUCH DAMAGE. 125 */ 126 127/* 128 * $NetBSD: kgdb_stub.c,v 1.8 2001/07/07 22:58:00 wdk Exp $ 129 * 130 * Taken from NetBSD 131 * 132 * "Stub" to allow remote cpu to debug over a serial line using gdb. 133 */ 134 135#include "arch/arm/remote_gdb.hh" 136 137#include <sys/signal.h> 138#include <unistd.h> 139 140#include <string> 141 142#include "arch/arm/decoder.hh" 143#include "arch/arm/pagetable.hh" 144#include "arch/arm/registers.hh" 145#include "arch/arm/system.hh" 146#include "arch/arm/utility.hh" 147#include "arch/arm/vtophys.hh" 148#include "base/chunk_generator.hh" 149#include "base/intmath.hh" 150#include "base/remote_gdb.hh" 151#include "base/socket.hh" 152#include "base/trace.hh" 153#include "cpu/static_inst.hh" 154#include "cpu/thread_context.hh" 155#include "cpu/thread_state.hh" 156#include "debug/GDBAcc.hh" 157#include "debug/GDBMisc.hh" 158#include "mem/page_table.hh" 159#include "mem/physical.hh" 160#include "mem/port.hh" 161#include "sim/full_system.hh" 162#include "sim/system.hh" 163 164using namespace std; 165using namespace ArmISA; 166 167RemoteGDB::RemoteGDB(System *_system, ThreadContext *tc, int _port) 168 : BaseRemoteGDB(_system, tc, _port), regCache32(this), regCache64(this) 169{ 170} 171 172/* 173 * Determine if the mapping at va..(va+len) is valid. 174 */ 175bool 176RemoteGDB::acc(Addr va, size_t len) 177{ 178 if (FullSystem) { 179 for (ChunkGenerator gen(va, len, PageBytes); !gen.done(); gen.next()) { 180 if (!virtvalid(context(), gen.addr())) { 181 DPRINTF(GDBAcc, "acc: %#x mapping is invalid\n", va); 182 return false; 183 } 184 } 185 186 DPRINTF(GDBAcc, "acc: %#x mapping is valid\n", va); 187 return true; 188 } else { 189 // Check to make sure the first byte is mapped into the processes 190 // address space. 191 return context()->getProcessPtr()->pTable->lookup(va) != nullptr; 192 } 193} 194 195void 196RemoteGDB::AArch64GdbRegCache::getRegs(ThreadContext *context) 197{ 198 DPRINTF(GDBAcc, "getRegs in remotegdb \n"); 199 200 for (int i = 0; i < 31; ++i) 201 r.x[i] = context->readIntReg(INTREG_X0 + i); 202 r.spx = context->readIntReg(INTREG_SPX); 203 r.pc = context->pcState().pc(); 204 r.cpsr = context->readMiscRegNoEffect(MISCREG_CPSR); 205 206 for (int i = 0; i < 32*4; i += 4) { 207 r.v[i + 0] = context->readFloatRegBits(i + 2); 208 r.v[i + 1] = context->readFloatRegBits(i + 3); 209 r.v[i + 2] = context->readFloatRegBits(i + 0); 210 r.v[i + 3] = context->readFloatRegBits(i + 1); 211 } 212 213 for (int i = 0; i < 32; i ++) { 214 r.vec[i] = context->readVecReg(RegId(VecRegClass,i)); 215 } 216} 217 218void 219RemoteGDB::AArch64GdbRegCache::setRegs(ThreadContext *context) const 220{ 221 DPRINTF(GDBAcc, "setRegs in remotegdb \n"); 222 223 for (int i = 0; i < 31; ++i) 224 context->setIntReg(INTREG_X0 + i, r.x[i]); 225 context->pcState(r.pc); 226 context->setMiscRegNoEffect(MISCREG_CPSR, r.cpsr); 227 // Update the stack pointer. This should be done after 228 // updating CPSR/PSTATE since that might affect how SPX gets 229 // mapped. 230 context->setIntReg(INTREG_SPX, r.spx); 231 232 for (int i = 0; i < 32*4; i += 4) { 233 context->setFloatRegBits(i + 2, r.v[i + 0]); 234 context->setFloatRegBits(i + 3, r.v[i + 1]); 235 context->setFloatRegBits(i + 0, r.v[i + 2]); 236 context->setFloatRegBits(i + 1, r.v[i + 3]); 237 } 238 239 for (int i = 0; i < 32; i ++) { 240 context->setVecReg(RegId(VecRegClass, i), r.vec[i]); 241 } 242} 243 244void 245RemoteGDB::AArch32GdbRegCache::getRegs(ThreadContext *context) 246{ 247 DPRINTF(GDBAcc, "getRegs in remotegdb \n"); 248 249 r.gpr[0] = context->readIntReg(INTREG_R0); 250 r.gpr[1] = context->readIntReg(INTREG_R1); 251 r.gpr[2] = context->readIntReg(INTREG_R2); 252 r.gpr[3] = context->readIntReg(INTREG_R3); 253 r.gpr[4] = context->readIntReg(INTREG_R4); 254 r.gpr[5] = context->readIntReg(INTREG_R5); 255 r.gpr[6] = context->readIntReg(INTREG_R6); 256 r.gpr[7] = context->readIntReg(INTREG_R7); 257 r.gpr[8] = context->readIntReg(INTREG_R8); 258 r.gpr[9] = context->readIntReg(INTREG_R9); 259 r.gpr[10] = context->readIntReg(INTREG_R10); 260 r.gpr[11] = context->readIntReg(INTREG_R11); 261 r.gpr[12] = context->readIntReg(INTREG_R12); 262 r.gpr[13] = context->readIntReg(INTREG_SP); 263 r.gpr[14] = context->readIntReg(INTREG_LR); 264 r.gpr[15] = context->pcState().pc(); 265 266 // One day somebody will implement transfer of FPRs correctly. 267 for (int i=0; i<8*3; i++) r.fpr[i] = 0; 268 269 r.fpscr = context->readMiscRegNoEffect(MISCREG_FPSCR); 270 r.cpsr = context->readMiscRegNoEffect(MISCREG_CPSR); 271} 272 273void 274RemoteGDB::AArch32GdbRegCache::setRegs(ThreadContext *context) const 275{ 276 DPRINTF(GDBAcc, "setRegs in remotegdb \n"); 277 278 context->setIntReg(INTREG_R0, r.gpr[0]); 279 context->setIntReg(INTREG_R1, r.gpr[1]); 280 context->setIntReg(INTREG_R2, r.gpr[2]); 281 context->setIntReg(INTREG_R3, r.gpr[3]); 282 context->setIntReg(INTREG_R4, r.gpr[4]); 283 context->setIntReg(INTREG_R5, r.gpr[5]); 284 context->setIntReg(INTREG_R6, r.gpr[6]); 285 context->setIntReg(INTREG_R7, r.gpr[7]); 286 context->setIntReg(INTREG_R8, r.gpr[8]); 287 context->setIntReg(INTREG_R9, r.gpr[9]); 288 context->setIntReg(INTREG_R10, r.gpr[10]); 289 context->setIntReg(INTREG_R11, r.gpr[11]); 290 context->setIntReg(INTREG_R12, r.gpr[12]); 291 context->setIntReg(INTREG_SP, r.gpr[13]); 292 context->setIntReg(INTREG_LR, r.gpr[14]); 293 context->pcState(r.gpr[15]); 294 295 // One day somebody will implement transfer of FPRs correctly. 296 297 context->setMiscReg(MISCREG_FPSCR, r.fpscr); 298 context->setMiscRegNoEffect(MISCREG_CPSR, r.cpsr); 299} 300 301BaseGdbRegCache* 302RemoteGDB::gdbRegs() 303{ 304 if (inAArch64(context())) 305 return ®Cache64; 306 else 307 return ®Cache32; 308} 309