remote_gdb.cc revision 10601:6efb37480d87
1/* 2 * Copyright 2014 Google, Inc. 3 * Copyright (c) 2010 ARM Limited 4 * All rights reserved 5 * 6 * The license below extends only to copyright in the software and shall 7 * not be construed as granting a license to any other intellectual 8 * property including but not limited to intellectual property relating 9 * to a hardware implementation of the functionality of the software 10 * licensed hereunder. You may use the software subject to the license 11 * terms below provided that you ensure that this notice is replicated 12 * unmodified and in its entirety in all distributions of the software, 13 * modified or unmodified, in source code or in binary form. 14 * 15 * Copyright (c) 2002-2005 The Regents of The University of Michigan 16 * All rights reserved. 17 * 18 * Redistribution and use in source and binary forms, with or without 19 * modification, are permitted provided that the following conditions are 20 * met: redistributions of source code must retain the above copyright 21 * notice, this list of conditions and the following disclaimer; 22 * redistributions in binary form must reproduce the above copyright 23 * notice, this list of conditions and the following disclaimer in the 24 * documentation and/or other materials provided with the distribution; 25 * neither the name of the copyright holders nor the names of its 26 * contributors may be used to endorse or promote products derived from 27 * this software without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 30 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 31 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 32 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 33 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 34 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 35 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 36 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 37 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 38 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 39 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 40 * 41 * Authors: Nathan Binkert 42 * William Wang 43 * Deyuan Guo 44 */ 45 46/* 47 * Copyright (c) 1990, 1993 The Regents of the University of California 48 * All rights reserved 49 * 50 * This software was developed by the Computer Systems Engineering group 51 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 52 * contributed to Berkeley. 53 * 54 * All advertising materials mentioning features or use of this software 55 * must display the following acknowledgement: 56 * This product includes software developed by the University of 57 * California, Lawrence Berkeley Laboratories. 58 * 59 * Redistribution and use in source and binary forms, with or without 60 * modification, are permitted provided that the following conditions 61 * are met: 62 * 1. Redistributions of source code must retain the above copyright 63 * notice, this list of conditions and the following disclaimer. 64 * 2. Redistributions in binary form must reproduce the above copyright 65 * notice, this list of conditions and the following disclaimer in the 66 * documentation and/or other materials provided with the distribution. 67 * 3. All advertising materials mentioning features or use of this software 68 * must display the following acknowledgement: 69 * This product includes software developed by the University of 70 * California, Berkeley and its contributors. 71 * 4. Neither the name of the University nor the names of its contributors 72 * may be used to endorse or promote products derived from this software 73 * without specific prior written permission. 74 * 75 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 76 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 77 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 78 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 79 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 80 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 81 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 82 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 83 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 84 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 85 * SUCH DAMAGE. 86 * 87 * @(#)kgdb_stub.c 8.4 (Berkeley) 1/12/94 88 */ 89 90/*- 91 * Copyright (c) 2001 The NetBSD Foundation, Inc. 92 * All rights reserved. 93 * 94 * This code is derived from software contributed to The NetBSD Foundation 95 * by Jason R. Thorpe. 96 * 97 * Redistribution and use in source and binary forms, with or without 98 * modification, are permitted provided that the following conditions 99 * are met: 100 * 1. Redistributions of source code must retain the above copyright 101 * notice, this list of conditions and the following disclaimer. 102 * 2. Redistributions in binary form must reproduce the above copyright 103 * notice, this list of conditions and the following disclaimer in the 104 * documentation and/or other materials provided with the distribution. 105 * 3. All advertising materials mentioning features or use of this software 106 * must display the following acknowledgement: 107 * This product includes software developed by the NetBSD 108 * Foundation, Inc. and its contributors. 109 * 4. Neither the name of The NetBSD Foundation nor the names of its 110 * contributors may be used to endorse or promote products derived 111 * from this software without specific prior written permission. 112 * 113 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 114 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 115 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 116 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 117 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 118 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 119 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 120 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 121 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 122 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 123 * POSSIBILITY OF SUCH DAMAGE. 124 */ 125 126/* 127 * $NetBSD: kgdb_stub.c,v 1.8 2001/07/07 22:58:00 wdk Exp $ 128 * 129 * Taken from NetBSD 130 * 131 * "Stub" to allow remote cpu to debug over a serial line using gdb. 132 */ 133 134#include <sys/signal.h> 135#include <unistd.h> 136 137#include <string> 138 139#include "arch/mips/decoder.hh" 140#include "arch/mips/remote_gdb.hh" 141#include "arch/mips/vtophys.hh" 142#include "cpu/thread_state.hh" 143#include "debug/GDBAcc.hh" 144#include "debug/GDBMisc.hh" 145#include "mem/page_table.hh" 146#include "sim/full_system.hh" 147 148using namespace std; 149using namespace MipsISA; 150 151RemoteGDB::RemoteGDB(System *_system, ThreadContext *tc) 152 : BaseRemoteGDB(_system, tc, GdbNumRegs * sizeof(uint32_t)) 153{ 154} 155 156/* 157 * Determine if the mapping at va..(va+len) is valid. 158 */ 159bool 160RemoteGDB::acc(Addr va, size_t len) 161{ 162 TlbEntry entry; 163 //Check to make sure the first byte is mapped into the processes address 164 //space. 165 if (FullSystem) 166 panic("acc not implemented for MIPS FS!"); 167 else 168 return context->getProcessPtr()->pTable->lookup(va, entry); 169} 170 171/* 172 * Translate the kernel debugger register format into the GDB register 173 * format. 174 */ 175void 176RemoteGDB::getregs() 177{ 178 DPRINTF(GDBAcc, "getregs in remotegdb \n"); 179 memset(gdbregs.regs, 0, gdbregs.bytes()); 180 181 // MIPS registers are 32 bits wide, gdb registers are 64 bits wide 182 // two MIPS registers are packed into one gdb register (little endian) 183 184 // INTREG: R0~R31 185 for (int i = 0; i < GdbIntArchRegs; i++) 186 gdbregs.regs32[i] = context->readIntReg(i); 187 // SR, LO, HI, BADVADDR, CAUSE, PC 188 gdbregs.regs32[GdbIntArchRegs + 0] = 189 context->readMiscRegNoEffect(MISCREG_STATUS); 190 gdbregs.regs32[GdbIntArchRegs + 1] = context->readIntReg(INTREG_LO); 191 gdbregs.regs32[GdbIntArchRegs + 2] = context->readIntReg(INTREG_HI); 192 gdbregs.regs32[GdbIntArchRegs + 3] = 193 context->readMiscRegNoEffect(MISCREG_BADVADDR); 194 gdbregs.regs32[GdbIntArchRegs + 4] = 195 context->readMiscRegNoEffect(MISCREG_CAUSE); 196 gdbregs.regs32[GdbIntArchRegs + 5] = context->pcState().pc(); 197 // FLOATREG: F0~F31 198 for (int i = 0; i < GdbFloatArchRegs; i++) 199 gdbregs.regs32[GdbIntRegs + i] = context->readFloatRegBits(i); 200 // FCR, FIR 201 gdbregs.regs32[GdbIntRegs + GdbFloatArchRegs + 0] = 202 context->readFloatRegBits(FLOATREG_FCCR); 203 gdbregs.regs32[GdbIntRegs + GdbFloatArchRegs + 1] = 204 context->readFloatRegBits(FLOATREG_FIR); 205} 206 207/* 208 * Translate the GDB register format into the kernel debugger register 209 * format. 210 */ 211void 212RemoteGDB::setregs() 213{ 214 DPRINTF(GDBAcc, "setregs in remotegdb \n"); 215 216 // INTREG: R0~R31 217 for (int i = 1; i < GdbIntArchRegs; i++) 218 context->setIntReg(i, gdbregs.regs32[i]); 219 // SR, LO, HI, BADVADDR, CAUSE, PC 220 context->setMiscRegNoEffect(MISCREG_STATUS, 221 gdbregs.regs32[GdbIntArchRegs + 0]); 222 context->setIntReg(INTREG_LO, gdbregs.regs32[GdbIntArchRegs + 1]); 223 context->setIntReg(INTREG_HI, gdbregs.regs32[GdbIntArchRegs + 2]); 224 context->setMiscRegNoEffect(MISCREG_BADVADDR, 225 gdbregs.regs32[GdbIntArchRegs + 3]); 226 context->setMiscRegNoEffect(MISCREG_CAUSE, 227 gdbregs.regs32[GdbIntArchRegs + 4]); 228 context->pcState(gdbregs.regs32[GdbIntArchRegs + 5]); 229 // FLOATREG: F0~F31 230 for (int i = 0; i < GdbFloatArchRegs; i++) 231 context->setFloatRegBits(i, gdbregs.regs32[GdbIntRegs + i]); 232 // FCR, FIR 233 context->setFloatRegBits(FLOATREG_FCCR, 234 gdbregs.regs32[GdbIntRegs + GdbFloatArchRegs + 0]); 235 context->setFloatRegBits(FLOATREG_FIR, 236 gdbregs.regs32[GdbIntRegs + GdbFloatArchRegs + 1]); 237} 238