remote_gdb.cc revision 5567
1955SN/A/* 2955SN/A * Copyright (c) 2002-2005 The Regents of The University of Michigan 31762SN/A * All rights reserved. 4955SN/A * 5955SN/A * Redistribution and use in source and binary forms, with or without 6955SN/A * modification, are permitted provided that the following conditions are 7955SN/A * met: redistributions of source code must retain the above copyright 8955SN/A * notice, this list of conditions and the following disclaimer; 9955SN/A * redistributions in binary form must reproduce the above copyright 10955SN/A * notice, this list of conditions and the following disclaimer in the 11955SN/A * documentation and/or other materials provided with the distribution; 12955SN/A * neither the name of the copyright holders nor the names of its 13955SN/A * contributors may be used to endorse or promote products derived from 14955SN/A * this software without specific prior written permission. 15955SN/A * 16955SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17955SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18955SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19955SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20955SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21955SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22955SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23955SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24955SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25955SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26955SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27955SN/A * 282665Ssaidi@eecs.umich.edu * Authors: Nathan Binkert 294762Snate@binkert.org */ 30955SN/A 315522Snate@binkert.org/* 326143Snate@binkert.org * Copyright (c) 1990, 1993 334762Snate@binkert.org * The Regents of the University of California. All rights reserved. 345522Snate@binkert.org * 35955SN/A * This software was developed by the Computer Systems Engineering group 365522Snate@binkert.org * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 3711974Sgabeblack@google.com * contributed to Berkeley. 38955SN/A * 395522Snate@binkert.org * All advertising materials mentioning features or use of this software 404202Sbinkertn@umich.edu * must display the following acknowledgement: 415742Snate@binkert.org * This product includes software developed by the University of 42955SN/A * California, Lawrence Berkeley Laboratories. 434381Sbinkertn@umich.edu * 444381Sbinkertn@umich.edu * Redistribution and use in source and binary forms, with or without 4512246Sgabeblack@google.com * modification, are permitted provided that the following conditions 4612246Sgabeblack@google.com * are met: 478334Snate@binkert.org * 1. Redistributions of source code must retain the above copyright 48955SN/A * notice, this list of conditions and the following disclaimer. 49955SN/A * 2. Redistributions in binary form must reproduce the above copyright 504202Sbinkertn@umich.edu * notice, this list of conditions and the following disclaimer in the 51955SN/A * documentation and/or other materials provided with the distribution. 524382Sbinkertn@umich.edu * 3. All advertising materials mentioning features or use of this software 534382Sbinkertn@umich.edu * must display the following acknowledgement: 544382Sbinkertn@umich.edu * This product includes software developed by the University of 556654Snate@binkert.org * California, Berkeley and its contributors. 565517Snate@binkert.org * 4. Neither the name of the University nor the names of its contributors 578614Sgblack@eecs.umich.edu * may be used to endorse or promote products derived from this software 587674Snate@binkert.org * without specific prior written permission. 596143Snate@binkert.org * 606143Snate@binkert.org * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 616143Snate@binkert.org * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 6212302Sgabeblack@google.com * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 6312302Sgabeblack@google.com * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 6412302Sgabeblack@google.com * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 6512302Sgabeblack@google.com * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 6612302Sgabeblack@google.com * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 6712302Sgabeblack@google.com * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 6812302Sgabeblack@google.com * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 6912302Sgabeblack@google.com * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 7012302Sgabeblack@google.com * SUCH DAMAGE. 7112302Sgabeblack@google.com * 7212302Sgabeblack@google.com * @(#)kgdb_stub.c 8.4 (Berkeley) 1/12/94 7312302Sgabeblack@google.com */ 7412363Sgabeblack@google.com 7512302Sgabeblack@google.com/*- 7612302Sgabeblack@google.com * Copyright (c) 2001 The NetBSD Foundation, Inc. 7712302Sgabeblack@google.com * All rights reserved. 7812363Sgabeblack@google.com * 7912302Sgabeblack@google.com * This code is derived from software contributed to The NetBSD Foundation 8012302Sgabeblack@google.com * by Jason R. Thorpe. 8112302Sgabeblack@google.com * 8212302Sgabeblack@google.com * Redistribution and use in source and binary forms, with or without 8312302Sgabeblack@google.com * modification, are permitted provided that the following conditions 8412302Sgabeblack@google.com * are met: 8512302Sgabeblack@google.com * 1. Redistributions of source code must retain the above copyright 8612363Sgabeblack@google.com * notice, this list of conditions and the following disclaimer. 8712302Sgabeblack@google.com * 2. Redistributions in binary form must reproduce the above copyright 8812302Sgabeblack@google.com * notice, this list of conditions and the following disclaimer in the 8912302Sgabeblack@google.com * documentation and/or other materials provided with the distribution. 9012302Sgabeblack@google.com * 3. All advertising materials mentioning features or use of this software 9111983Sgabeblack@google.com * must display the following acknowledgement: 926143Snate@binkert.org * This product includes software developed by the NetBSD 938233Snate@binkert.org * Foundation, Inc. and its contributors. 9412302Sgabeblack@google.com * 4. Neither the name of The NetBSD Foundation nor the names of its 956143Snate@binkert.org * contributors may be used to endorse or promote products derived 966143Snate@binkert.org * from this software without specific prior written permission. 9712302Sgabeblack@google.com * 984762Snate@binkert.org * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 996143Snate@binkert.org * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 1008233Snate@binkert.org * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 1018233Snate@binkert.org * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 10212302Sgabeblack@google.com * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 10312302Sgabeblack@google.com * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 1046143Snate@binkert.org * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 10512362Sgabeblack@google.com * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 10612362Sgabeblack@google.com * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 10712362Sgabeblack@google.com * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 10812362Sgabeblack@google.com * POSSIBILITY OF SUCH DAMAGE. 10912302Sgabeblack@google.com */ 11012302Sgabeblack@google.com 11112302Sgabeblack@google.com/* 11212302Sgabeblack@google.com * $NetBSD: kgdb_stub.c,v 1.8 2001/07/07 22:58:00 wdk Exp $ 11312302Sgabeblack@google.com * 11412363Sgabeblack@google.com * Taken from NetBSD 11512363Sgabeblack@google.com * 11612363Sgabeblack@google.com * "Stub" to allow remote cpu to debug over a serial line using gdb. 11712363Sgabeblack@google.com */ 11812302Sgabeblack@google.com 11912363Sgabeblack@google.com#include <sys/signal.h> 12012363Sgabeblack@google.com 12112363Sgabeblack@google.com#include <string> 12212363Sgabeblack@google.com#include <unistd.h> 12312363Sgabeblack@google.com 1248233Snate@binkert.org#include "config/full_system.hh" 1256143Snate@binkert.org#if FULL_SYSTEM 1266143Snate@binkert.org#include "arch/alpha/vtophys.hh" 1276143Snate@binkert.org#endif 1286143Snate@binkert.org 1296143Snate@binkert.org#include "arch/alpha/kgdb.h" 1306143Snate@binkert.org#include "arch/alpha/utility.hh" 1316143Snate@binkert.org#include "arch/alpha/remote_gdb.hh" 1326143Snate@binkert.org#include "base/intmath.hh" 1336143Snate@binkert.org#include "base/remote_gdb.hh" 1347065Snate@binkert.org#include "base/socket.hh" 1356143Snate@binkert.org#include "base/trace.hh" 13612362Sgabeblack@google.com#include "cpu/thread_context.hh" 13712362Sgabeblack@google.com#include "cpu/static_inst.hh" 13812362Sgabeblack@google.com#include "mem/physical.hh" 13912362Sgabeblack@google.com#include "mem/port.hh" 14012362Sgabeblack@google.com#include "sim/system.hh" 14112362Sgabeblack@google.com 14212362Sgabeblack@google.comusing namespace std; 14312362Sgabeblack@google.comusing namespace AlphaISA; 14412362Sgabeblack@google.com 14512362Sgabeblack@google.comRemoteGDB::RemoteGDB(System *_system, ThreadContext *c) 14612362Sgabeblack@google.com : BaseRemoteGDB(_system, c, KGDB_NUMREGS) 14712362Sgabeblack@google.com{ 1488233Snate@binkert.org memset(gdbregs.regs, 0, gdbregs.bytes()); 1498233Snate@binkert.org} 1508233Snate@binkert.org 1518233Snate@binkert.org/////////////////////////////////////////////////////////// 1528233Snate@binkert.org// RemoteGDB::acc 1538233Snate@binkert.org// 1548233Snate@binkert.org// Determine if the mapping at va..(va+len) is valid. 1558233Snate@binkert.org// 1568233Snate@binkert.orgbool 1578233Snate@binkert.orgRemoteGDB::acc(Addr va, size_t len) 1588233Snate@binkert.org{ 1598233Snate@binkert.org#if !FULL_SYSTEM 1608233Snate@binkert.org panic("acc function needs to be rewritten for SE mode\n"); 1618233Snate@binkert.org#else 1628233Snate@binkert.org Addr last_va; 1638233Snate@binkert.org 1648233Snate@binkert.org va = AlphaISA::TruncPage(va); 1658233Snate@binkert.org last_va = AlphaISA::RoundPage(va + len); 1668233Snate@binkert.org 1678233Snate@binkert.org do { 1688233Snate@binkert.org if (AlphaISA::IsK0Seg(va)) { 1696143Snate@binkert.org if (va < (AlphaISA::K0SegBase + pmem->size())) { 1706143Snate@binkert.org DPRINTF(GDBAcc, "acc: Mapping is valid K0SEG <= " 1716143Snate@binkert.org "%#x < K0SEG + size\n", va); 1726143Snate@binkert.org return true; 1736143Snate@binkert.org } else { 1746143Snate@binkert.org DPRINTF(GDBAcc, "acc: Mapping invalid %#x > K0SEG + size\n", 1759982Satgutier@umich.edu va); 1766143Snate@binkert.org return false; 17712302Sgabeblack@google.com } 17812302Sgabeblack@google.com } 17912302Sgabeblack@google.com 18012302Sgabeblack@google.com /** 18112302Sgabeblack@google.com * This code says that all accesses to palcode (instruction and data) 18212302Sgabeblack@google.com * are valid since there isn't a va->pa mapping because palcode is 18312302Sgabeblack@google.com * accessed physically. At some point this should probably be cleaned up 18412302Sgabeblack@google.com * but there is no easy way to do it. 18511983Sgabeblack@google.com */ 18611983Sgabeblack@google.com 18711983Sgabeblack@google.com if (AlphaISA::PcPAL(va) || va < 0x10000) 18812302Sgabeblack@google.com return true; 18912302Sgabeblack@google.com 19012302Sgabeblack@google.com Addr ptbr = context->readMiscRegNoEffect(AlphaISA::IPR_PALtemp20); 19112302Sgabeblack@google.com AlphaISA::PageTableEntry pte = AlphaISA::kernel_pte_lookup(context->getPhysPort(), ptbr, va); 19212302Sgabeblack@google.com if (!pte.valid()) { 19312302Sgabeblack@google.com DPRINTF(GDBAcc, "acc: %#x pte is invalid\n", va); 19411983Sgabeblack@google.com return false; 1956143Snate@binkert.org } 19612305Sgabeblack@google.com va += AlphaISA::PageBytes; 19712302Sgabeblack@google.com } while (va < last_va); 19812302Sgabeblack@google.com 19912302Sgabeblack@google.com DPRINTF(GDBAcc, "acc: %#x mapping is valid\n", va); 2006143Snate@binkert.org return true; 2016143Snate@binkert.org#endif 2026143Snate@binkert.org} 2035522Snate@binkert.org 2046143Snate@binkert.org/////////////////////////////////////////////////////////// 2056143Snate@binkert.org// RemoteGDB::getregs 2066143Snate@binkert.org// 2079982Satgutier@umich.edu// Translate the kernel debugger register format into 20812302Sgabeblack@google.com// the GDB register format. 20912302Sgabeblack@google.comvoid 21012302Sgabeblack@google.comRemoteGDB::getregs() 2116143Snate@binkert.org{ 2126143Snate@binkert.org memset(gdbregs.regs, 0, gdbregs.bytes()); 2136143Snate@binkert.org 2146143Snate@binkert.org gdbregs.regs[KGDB_REG_PC] = context->readPC(); 2155522Snate@binkert.org 2165522Snate@binkert.org // @todo: Currently this is very Alpha specific. 2175522Snate@binkert.org if (AlphaISA::PcPAL(gdbregs.regs[KGDB_REG_PC])) { 2185522Snate@binkert.org for (int i = 0; i < AlphaISA::NumIntArchRegs; ++i) { 2195604Snate@binkert.org gdbregs.regs[i] = context->readIntReg(AlphaISA::reg_redir[i]); 2205604Snate@binkert.org } 2216143Snate@binkert.org } else { 2226143Snate@binkert.org for (int i = 0; i < AlphaISA::NumIntArchRegs; ++i) { 2234762Snate@binkert.org gdbregs.regs[i] = context->readIntReg(i); 2244762Snate@binkert.org } 2256143Snate@binkert.org } 2266727Ssteve.reinhardt@amd.com 2276727Ssteve.reinhardt@amd.com#ifdef KGDB_FP_REGS 2286727Ssteve.reinhardt@amd.com for (int i = 0; i < AlphaISA::NumFloatArchRegs; ++i) { 2294762Snate@binkert.org gdbregs.regs[i + KGDB_REG_F0] = context->readFloatRegBits(i); 2306143Snate@binkert.org } 2316143Snate@binkert.org#endif 2326143Snate@binkert.org} 2336143Snate@binkert.org 2346727Ssteve.reinhardt@amd.com/////////////////////////////////////////////////////////// 2356143Snate@binkert.org// RemoteGDB::setregs 2367674Snate@binkert.org// 2377674Snate@binkert.org// Translate the GDB register format into the kernel 2385604Snate@binkert.org// debugger register format. 2396143Snate@binkert.org// 2406143Snate@binkert.orgvoid 2416143Snate@binkert.orgRemoteGDB::setregs() 2424762Snate@binkert.org{ 2436143Snate@binkert.org // @todo: Currently this is very Alpha specific. 2444762Snate@binkert.org if (AlphaISA::PcPAL(gdbregs.regs[KGDB_REG_PC])) { 2454762Snate@binkert.org for (int i = 0; i < AlphaISA::NumIntArchRegs; ++i) { 2464762Snate@binkert.org context->setIntReg(AlphaISA::reg_redir[i], gdbregs.regs[i]); 2476143Snate@binkert.org } 2486143Snate@binkert.org } else { 2494762Snate@binkert.org for (int i = 0; i < AlphaISA::NumIntArchRegs; ++i) { 25012302Sgabeblack@google.com context->setIntReg(i, gdbregs.regs[i]); 25112302Sgabeblack@google.com } 2528233Snate@binkert.org } 25312302Sgabeblack@google.com 2546143Snate@binkert.org#ifdef KGDB_FP_REGS 2556143Snate@binkert.org for (int i = 0; i < AlphaISA::NumFloatArchRegs; ++i) { 2564762Snate@binkert.org context->setFloatRegBits(i, gdbregs.regs[i + KGDB_REG_F0]); 2576143Snate@binkert.org } 2584762Snate@binkert.org#endif 2599396Sandreas.hansson@arm.com context->setPC(gdbregs.regs[KGDB_REG_PC]); 2609396Sandreas.hansson@arm.com} 2619396Sandreas.hansson@arm.com 26212302Sgabeblack@google.comvoid 26312302Sgabeblack@google.comRemoteGDB::clearSingleStep() 26412302Sgabeblack@google.com{ 2659396Sandreas.hansson@arm.com DPRINTF(GDBMisc, "clearSingleStep bt_addr=%#x nt_addr=%#x\n", 2669396Sandreas.hansson@arm.com takenBkpt, notTakenBkpt); 2679396Sandreas.hansson@arm.com 2689396Sandreas.hansson@arm.com if (takenBkpt != 0) 2699396Sandreas.hansson@arm.com clearTempBreakpoint(takenBkpt); 2709396Sandreas.hansson@arm.com 2719396Sandreas.hansson@arm.com if (notTakenBkpt != 0) 2729930Sandreas.hansson@arm.com clearTempBreakpoint(notTakenBkpt); 2739930Sandreas.hansson@arm.com} 2749396Sandreas.hansson@arm.com 2758235Snate@binkert.orgvoid 2768235Snate@binkert.orgRemoteGDB::setSingleStep() 2776143Snate@binkert.org{ 2788235Snate@binkert.org Addr pc = context->readPC(); 2799003SAli.Saidi@ARM.com Addr npc, bpc; 2808235Snate@binkert.org bool set_bt = false; 2818235Snate@binkert.org 28212302Sgabeblack@google.com npc = pc + sizeof(MachInst); 2838235Snate@binkert.org 28412302Sgabeblack@google.com // User was stopped at pc, e.g. the instruction at pc was not 2858235Snate@binkert.org // executed. 2868235Snate@binkert.org MachInst inst = read<MachInst>(pc); 28712302Sgabeblack@google.com StaticInstPtr si(inst, pc); 2888235Snate@binkert.org if (si->hasBranchTarget(pc, context, bpc)) { 2898235Snate@binkert.org // Don't bother setting a breakpoint on the taken branch if it 2908235Snate@binkert.org // is the same as the next pc 2918235Snate@binkert.org if (bpc != npc) 2929003SAli.Saidi@ARM.com set_bt = true; 29312313Sgabeblack@google.com } 29412313Sgabeblack@google.com 29512313Sgabeblack@google.com DPRINTF(GDBMisc, "setSingleStep bt_addr=%#x nt_addr=%#x\n", 29612313Sgabeblack@google.com takenBkpt, notTakenBkpt); 29712313Sgabeblack@google.com 29812313Sgabeblack@google.com setTempBreakpoint(notTakenBkpt = npc); 29912315Sgabeblack@google.com 30012315Sgabeblack@google.com if (set_bt) 30112315Sgabeblack@google.com setTempBreakpoint(takenBkpt = bpc); 3025584Snate@binkert.org} 3034382Sbinkertn@umich.edu 3044202Sbinkertn@umich.edu// Write bytes to kernel address space for debugger. 3054382Sbinkertn@umich.edubool 3064382Sbinkertn@umich.eduRemoteGDB::write(Addr vaddr, size_t size, const char *data) 3079396Sandreas.hansson@arm.com{ 3085584Snate@binkert.org if (BaseRemoteGDB::write(vaddr, size, data)) { 30912313Sgabeblack@google.com#ifdef IMB 3104382Sbinkertn@umich.edu alpha_pal_imb(); 3114382Sbinkertn@umich.edu#endif 3124382Sbinkertn@umich.edu return true; 3138232Snate@binkert.org } else { 3145192Ssaidi@eecs.umich.edu return false; 3158232Snate@binkert.org } 3168232Snate@binkert.org} 3178232Snate@binkert.org 3185192Ssaidi@eecs.umich.edu