remote_gdb.cc revision 5543
19793Sakash.bagdia@arm.com/* 28706Sandreas.hansson@arm.com * Copyright (c) 2002-2005 The Regents of The University of Michigan 38706Sandreas.hansson@arm.com * All rights reserved. 48706Sandreas.hansson@arm.com * 58706Sandreas.hansson@arm.com * Redistribution and use in source and binary forms, with or without 68706Sandreas.hansson@arm.com * modification, are permitted provided that the following conditions are 78706Sandreas.hansson@arm.com * met: redistributions of source code must retain the above copyright 88706Sandreas.hansson@arm.com * notice, this list of conditions and the following disclaimer; 98706Sandreas.hansson@arm.com * redistributions in binary form must reproduce the above copyright 108706Sandreas.hansson@arm.com * notice, this list of conditions and the following disclaimer in the 118706Sandreas.hansson@arm.com * documentation and/or other materials provided with the distribution; 128706Sandreas.hansson@arm.com * neither the name of the copyright holders nor the names of its 135369Ssaidi@eecs.umich.edu * contributors may be used to endorse or promote products derived from 143005Sstever@eecs.umich.edu * this software without specific prior written permission. 153005Sstever@eecs.umich.edu * 163005Sstever@eecs.umich.edu * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 173005Sstever@eecs.umich.edu * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 183005Sstever@eecs.umich.edu * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 193005Sstever@eecs.umich.edu * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 203005Sstever@eecs.umich.edu * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 213005Sstever@eecs.umich.edu * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 223005Sstever@eecs.umich.edu * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 233005Sstever@eecs.umich.edu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 243005Sstever@eecs.umich.edu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 253005Sstever@eecs.umich.edu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 263005Sstever@eecs.umich.edu * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 273005Sstever@eecs.umich.edu * 283005Sstever@eecs.umich.edu * Authors: Nathan Binkert 293005Sstever@eecs.umich.edu */ 303005Sstever@eecs.umich.edu 313005Sstever@eecs.umich.edu/* 323005Sstever@eecs.umich.edu * Copyright (c) 1990, 1993 333005Sstever@eecs.umich.edu * The Regents of the University of California. All rights reserved. 343005Sstever@eecs.umich.edu * 353005Sstever@eecs.umich.edu * This software was developed by the Computer Systems Engineering group 363005Sstever@eecs.umich.edu * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 373005Sstever@eecs.umich.edu * contributed to Berkeley. 383005Sstever@eecs.umich.edu * 393005Sstever@eecs.umich.edu * All advertising materials mentioning features or use of this software 403005Sstever@eecs.umich.edu * must display the following acknowledgement: 412710SN/A * This product includes software developed by the University of 422710SN/A * California, Lawrence Berkeley Laboratories. 433005Sstever@eecs.umich.edu * 442889SN/A * Redistribution and use in source and binary forms, with or without 4512564Sgabeblack@google.com * modification, are permitted provided that the following conditions 4613774Sandreas.sandberg@arm.com * are met: 4712564Sgabeblack@google.com * 1. Redistributions of source code must retain the above copyright 486654Snate@binkert.org * notice, this list of conditions and the following disclaimer. 496654Snate@binkert.org * 2. Redistributions in binary form must reproduce the above copyright 509907Snilay@cs.wisc.edu * notice, this list of conditions and the following disclaimer in the 516654Snate@binkert.org * documentation and/or other materials provided with the distribution. 522667SN/A * 3. All advertising materials mentioning features or use of this software 536654Snate@binkert.org * must display the following acknowledgement: 546654Snate@binkert.org * This product includes software developed by the University of 5512395Sswapnilster@gmail.com * California, Berkeley and its contributors. 565457Ssaidi@eecs.umich.edu * 4. Neither the name of the University nor the names of its contributors 5711670Sandreas.hansson@arm.com * may be used to endorse or promote products derived from this software 5811670Sandreas.hansson@arm.com * without specific prior written permission. 5911670Sandreas.hansson@arm.com * 608169SLisa.Hsu@amd.com * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 6111682Sandreas.hansson@arm.com * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 6211682Sandreas.hansson@arm.com * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 6311682Sandreas.hansson@arm.com * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 6411682Sandreas.hansson@arm.com * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 6513432Spau.cabre@metempsy.com * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 6611682Sandreas.hansson@arm.com * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 6711682Sandreas.hansson@arm.com * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 6811682Sandreas.hansson@arm.com * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 693394Shsul@eecs.umich.edu * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 709197Snilay@cs.wisc.edu * SUCH DAMAGE. 719197Snilay@cs.wisc.edu * 729197Snilay@cs.wisc.edu * @(#)kgdb_stub.c 8.4 (Berkeley) 1/12/94 739197Snilay@cs.wisc.edu */ 749197Snilay@cs.wisc.edu 759197Snilay@cs.wisc.edu/*- 769197Snilay@cs.wisc.edu * Copyright (c) 2001 The NetBSD Foundation, Inc. 779197Snilay@cs.wisc.edu * All rights reserved. 789197Snilay@cs.wisc.edu * 799197Snilay@cs.wisc.edu * This code is derived from software contributed to The NetBSD Foundation 809197Snilay@cs.wisc.edu * by Jason R. Thorpe. 819197Snilay@cs.wisc.edu * 829197Snilay@cs.wisc.edu * Redistribution and use in source and binary forms, with or without 839197Snilay@cs.wisc.edu * modification, are permitted provided that the following conditions 849197Snilay@cs.wisc.edu * are met: 859197Snilay@cs.wisc.edu * 1. Redistributions of source code must retain the above copyright 869197Snilay@cs.wisc.edu * notice, this list of conditions and the following disclaimer. 879197Snilay@cs.wisc.edu * 2. Redistributions in binary form must reproduce the above copyright 889197Snilay@cs.wisc.edu * notice, this list of conditions and the following disclaimer in the 899197Snilay@cs.wisc.edu * documentation and/or other materials provided with the distribution. 909197Snilay@cs.wisc.edu * 3. All advertising materials mentioning features or use of this software 9112146Spau.cabre@metempsy.com * must display the following acknowledgement: 929197Snilay@cs.wisc.edu * This product includes software developed by the NetBSD 939907Snilay@cs.wisc.edu * Foundation, Inc. and its contributors. 949197Snilay@cs.wisc.edu * 4. Neither the name of The NetBSD Foundation nor the names of its 9510803Sbrandon.potter@amd.com * contributors may be used to endorse or promote products derived 9610803Sbrandon.potter@amd.com * from this software without specific prior written permission. 9710803Sbrandon.potter@amd.com * 9810803Sbrandon.potter@amd.com * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 999197Snilay@cs.wisc.edu * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 1009217Snilay@cs.wisc.edu * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 1019197Snilay@cs.wisc.edu * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 1029197Snilay@cs.wisc.edu * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 1039197Snilay@cs.wisc.edu * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 1049197Snilay@cs.wisc.edu * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 1059197Snilay@cs.wisc.edu * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 1069197Snilay@cs.wisc.edu * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 1079197Snilay@cs.wisc.edu * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 1089197Snilay@cs.wisc.edu * POSSIBILITY OF SUCH DAMAGE. 1099197Snilay@cs.wisc.edu */ 1109197Snilay@cs.wisc.edu 1119197Snilay@cs.wisc.edu/* 1129197Snilay@cs.wisc.edu * $NetBSD: kgdb_stub.c,v 1.8 2001/07/07 22:58:00 wdk Exp $ 1139197Snilay@cs.wisc.edu * 1149197Snilay@cs.wisc.edu * Taken from NetBSD 11512014Sgabeblack@google.com * 1169197Snilay@cs.wisc.edu * "Stub" to allow remote cpu to debug over a serial line using gdb. 1179197Snilay@cs.wisc.edu */ 1189197Snilay@cs.wisc.edu 1199197Snilay@cs.wisc.edu#include <sys/signal.h> 1209197Snilay@cs.wisc.edu 1212957SN/A#include <string> 1228920Snilay@cs.wisc.edu#include <unistd.h> 1238920Snilay@cs.wisc.edu 1242957SN/A#include "config/full_system.hh" 1258862Snilay@cs.wisc.edu#if FULL_SYSTEM 1268862Snilay@cs.wisc.edu#include "arch/alpha/vtophys.hh" 1278467Snilay@cs.wisc.edu#endif 1282957SN/A 1292957SN/A#include "arch/alpha/kgdb.h" 1302957SN/A#include "arch/alpha/utility.hh" 13112564Sgabeblack@google.com#include "arch/alpha/remote_gdb.hh" 1322957SN/A#include "base/intmath.hh" 1332957SN/A#include "base/remote_gdb.hh" 1348167SLisa.Hsu@amd.com#include "base/socket.hh" 1359197Snilay@cs.wisc.edu#include "base/trace.hh" 1368167SLisa.Hsu@amd.com#include "cpu/thread_context.hh" 1375369Ssaidi@eecs.umich.edu#include "cpu/static_inst.hh" 1388167SLisa.Hsu@amd.com#include "mem/physical.hh" 1398167SLisa.Hsu@amd.com#include "mem/port.hh" 14012564Sgabeblack@google.com#include "sim/system.hh" 1418167SLisa.Hsu@amd.com 1428167SLisa.Hsu@amd.comusing namespace std; 1438167SLisa.Hsu@amd.comusing namespace TheISA; 1448167SLisa.Hsu@amd.com 1458168SLisa.Hsu@amd.comRemoteGDB::RemoteGDB(System *_system, ThreadContext *c) 14610037SARM gem5 Developers : BaseRemoteGDB(_system, c, KGDB_NUMREGS) 14710037SARM gem5 Developers{ 14810037SARM gem5 Developers memset(gdbregs.regs, 0, gdbregs.bytes()); 14910037SARM gem5 Developers} 15010037SARM gem5 Developers 1518168SLisa.Hsu@amd.com/////////////////////////////////////////////////////////// 15210037SARM gem5 Developers// RemoteGDB::acc 15310037SARM gem5 Developers// 15411851Sbrandon.potter@amd.com// Determine if the mapping at va..(va+len) is valid. 1558167SLisa.Hsu@amd.com// 15612564Sgabeblack@google.combool 15712564Sgabeblack@google.comRemoteGDB::acc(Addr va, size_t len) 15812564Sgabeblack@google.com{ 1595369Ssaidi@eecs.umich.edu#if !FULL_SYSTEM 1608920Snilay@cs.wisc.edu panic("acc function needs to be rewritten for SE mode\n"); 1619197Snilay@cs.wisc.edu#else 1628920Snilay@cs.wisc.edu Addr last_va; 16312564Sgabeblack@google.com 1648920Snilay@cs.wisc.edu va = TheISA::TruncPage(va); 1655369Ssaidi@eecs.umich.edu last_va = TheISA::RoundPage(va + len); 1665369Ssaidi@eecs.umich.edu 1678718Snilay@cs.wisc.edu do { 1689197Snilay@cs.wisc.edu if (TheISA::IsK0Seg(va)) { 1699197Snilay@cs.wisc.edu if (va < (TheISA::K0SegBase + pmem->size())) { 1709197Snilay@cs.wisc.edu DPRINTF(GDBAcc, "acc: Mapping is valid K0SEG <= " 1719197Snilay@cs.wisc.edu "%#x < K0SEG + size\n", va); 1729197Snilay@cs.wisc.edu return true; 1733005Sstever@eecs.umich.edu } else { 1743395Shsul@eecs.umich.edu DPRINTF(GDBAcc, "acc: Mapping invalid %#x > K0SEG + size\n", 17513731Sandreas.sandberg@arm.com va); 1769793Sakash.bagdia@arm.com return false; 1779836Sandreas.hansson@arm.com } 1789815SAndreas Hansson <andreas.hansson> } 1799793Sakash.bagdia@arm.com 18011147Smitch.hayenga@arm.com /** 18111147Smitch.hayenga@arm.com * This code says that all accesses to palcode (instruction and data) 18211147Smitch.hayenga@arm.com * are valid since there isn't a va->pa mapping because palcode is 1839827Sakash.bagdia@arm.com * accessed physically. At some point this should probably be cleaned up 1849827Sakash.bagdia@arm.com * but there is no easy way to do it. 1859827Sakash.bagdia@arm.com */ 1869827Sakash.bagdia@arm.com 1879827Sakash.bagdia@arm.com if (AlphaISA::PcPAL(va) || va < 0x10000) 1889827Sakash.bagdia@arm.com return true; 1899827Sakash.bagdia@arm.com 1909827Sakash.bagdia@arm.com Addr ptbr = context->readMiscRegNoEffect(AlphaISA::IPR_PALtemp20); 1919827Sakash.bagdia@arm.com TheISA::PageTableEntry pte = TheISA::kernel_pte_lookup(context->getPhysPort(), ptbr, va); 1929827Sakash.bagdia@arm.com if (!pte.valid()) { 1939793Sakash.bagdia@arm.com DPRINTF(GDBAcc, "acc: %#x pte is invalid\n", va); 1949827Sakash.bagdia@arm.com return false; 1959827Sakash.bagdia@arm.com } 1969827Sakash.bagdia@arm.com va += TheISA::PageBytes; 1979793Sakash.bagdia@arm.com } while (va < last_va); 19811251Sradhika.jagtap@ARM.com 19911251Sradhika.jagtap@ARM.com DPRINTF(GDBAcc, "acc: %#x mapping is valid\n", va); 20011251Sradhika.jagtap@ARM.com return true; 20111251Sradhika.jagtap@ARM.com#endif 20211251Sradhika.jagtap@ARM.com} 2039793Sakash.bagdia@arm.com 2049793Sakash.bagdia@arm.com/////////////////////////////////////////////////////////// 2059793Sakash.bagdia@arm.com// RemoteGDB::getregs 2069793Sakash.bagdia@arm.com// 2073395Shsul@eecs.umich.edu// Translate the kernel debugger register format into 20812941Sandreas.sandberg@arm.com// the GDB register format. 20910555Salexandru.dutu@amd.comvoid 21011839SCurtis.Dunham@arm.comRemoteGDB::getregs() 21110555Salexandru.dutu@amd.com{ 21210555Salexandru.dutu@amd.com memset(gdbregs.regs, 0, gdbregs.bytes()); 21310555Salexandru.dutu@amd.com 21410555Salexandru.dutu@amd.com gdbregs.regs[KGDB_REG_PC] = context->readPC(); 21510555Salexandru.dutu@amd.com 21610555Salexandru.dutu@amd.com // @todo: Currently this is very Alpha specific. 2178926Sandreas.hansson@arm.com if (AlphaISA::PcPAL(gdbregs.regs[KGDB_REG_PC])) { 2189647Sdam.sunwoo@arm.com for (int i = 0; i < TheISA::NumIntArchRegs; ++i) { 21913684Sgiacomo.travaglini@arm.com gdbregs.regs[i] = context->readIntReg(AlphaISA::reg_redir[i]); 22013012Sandreas.sandberg@arm.com } 2219647Sdam.sunwoo@arm.com } else { 2229647Sdam.sunwoo@arm.com for (int i = 0; i < TheISA::NumIntArchRegs; ++i) { 2239647Sdam.sunwoo@arm.com gdbregs.regs[i] = context->readIntReg(i); 22413731Sandreas.sandberg@arm.com } 2259197Snilay@cs.wisc.edu } 2269197Snilay@cs.wisc.edu 2279197Snilay@cs.wisc.edu#ifdef KGDB_FP_REGS 2288957Sjayneel@cs.wisc.edu for (int i = 0; i < TheISA::NumFloatArchRegs; ++i) { 2298957Sjayneel@cs.wisc.edu gdbregs.regs[i + KGDB_REG_F0] = context->readFloatRegBits(i); 2308957Sjayneel@cs.wisc.edu } 2313005Sstever@eecs.umich.edu#endif 2329647Sdam.sunwoo@arm.com} 23310381Sdam.sunwoo@arm.com 2349647Sdam.sunwoo@arm.com/////////////////////////////////////////////////////////// 2358887Sgeoffrey.blake@arm.com// RemoteGDB::setregs 2368887Sgeoffrey.blake@arm.com// 2378887Sgeoffrey.blake@arm.com// Translate the GDB register format into the kernel 23813432Spau.cabre@metempsy.com// debugger register format. 23913432Spau.cabre@metempsy.com// 24013432Spau.cabre@metempsy.comvoid 24113432Spau.cabre@metempsy.comRemoteGDB::setregs() 2429384SAndreas.Sandberg@arm.com{ 2439384SAndreas.Sandberg@arm.com // @todo: Currently this is very Alpha specific. 2448887Sgeoffrey.blake@arm.com if (AlphaISA::PcPAL(gdbregs.regs[KGDB_REG_PC])) { 24510519Snilay@cs.wisc.edu for (int i = 0; i < TheISA::NumIntArchRegs; ++i) { 24610120Snilay@cs.wisc.edu context->setIntReg(AlphaISA::reg_redir[i], gdbregs.regs[i]); 2478896Snilay@cs.wisc.edu } 24810300Scastilloe@unican.es } else { 24910300Scastilloe@unican.es for (int i = 0; i < TheISA::NumIntArchRegs; ++i) { 25013731Sandreas.sandberg@arm.com context->setIntReg(i, gdbregs.regs[i]); 25110120Snilay@cs.wisc.edu } 2528896Snilay@cs.wisc.edu } 2538896Snilay@cs.wisc.edu 2549268Smalek.musleh@gmail.com#ifdef KGDB_FP_REGS 2559268Smalek.musleh@gmail.com for (int i = 0; i < TheISA::NumFloatArchRegs; ++i) { 2568896Snilay@cs.wisc.edu context->setFloatRegBits(i, gdbregs.regs[i + KGDB_REG_F0]); 2578896Snilay@cs.wisc.edu } 2588896Snilay@cs.wisc.edu#endif 2598896Snilay@cs.wisc.edu context->setPC(gdbregs.regs[KGDB_REG_PC]); 2608896Snilay@cs.wisc.edu} 2619222Shestness@cs.wisc.edu 26211150Smitch.hayenga@arm.comvoid 26311150Smitch.hayenga@arm.comRemoteGDB::clearSingleStep() 26411150Smitch.hayenga@arm.com{ 2659222Shestness@cs.wisc.edu DPRINTF(GDBMisc, "clearSingleStep bt_addr=%#x nt_addr=%#x\n", 2669222Shestness@cs.wisc.edu takenBkpt, notTakenBkpt); 2678887Sgeoffrey.blake@arm.com 26810150Snilay@cs.wisc.edu if (takenBkpt != 0) 26910720Sandreas.hansson@arm.com clearTempBreakpoint(takenBkpt); 2708887Sgeoffrey.blake@arm.com 2718887Sgeoffrey.blake@arm.com if (notTakenBkpt != 0) 2729836Sandreas.hansson@arm.com clearTempBreakpoint(notTakenBkpt); 2738887Sgeoffrey.blake@arm.com} 2748801Sgblack@eecs.umich.edu 2753481Shsul@eecs.umich.eduvoid 276RemoteGDB::setSingleStep() 277{ 278 Addr pc = context->readPC(); 279 Addr npc, bpc; 280 bool set_bt = false; 281 282 npc = pc + sizeof(MachInst); 283 284 // User was stopped at pc, e.g. the instruction at pc was not 285 // executed. 286 MachInst inst = read<MachInst>(pc); 287 StaticInstPtr si(inst, pc); 288 if (si->hasBranchTarget(pc, context, bpc)) { 289 // Don't bother setting a breakpoint on the taken branch if it 290 // is the same as the next pc 291 if (bpc != npc) 292 set_bt = true; 293 } 294 295 DPRINTF(GDBMisc, "setSingleStep bt_addr=%#x nt_addr=%#x\n", 296 takenBkpt, notTakenBkpt); 297 298 setTempBreakpoint(notTakenBkpt = npc); 299 300 if (set_bt) 301 setTempBreakpoint(takenBkpt = bpc); 302} 303 304// Write bytes to kernel address space for debugger. 305bool 306RemoteGDB::write(Addr vaddr, size_t size, const char *data) 307{ 308 if (BaseRemoteGDB::write(vaddr, size, data)) { 309#ifdef IMB 310 alpha_pal_imb(); 311#endif 312 return true; 313 } else { 314 return false; 315 } 316} 317 318