pc_event.cc revision 56
1/* 2 * Copyright (c) 2003 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 29#include <algorithm> 30#include <map> 31#include <string> 32#include <utility> 33 34#include "sim/debug.hh" 35#include "cpu/exec_context.hh" 36#include "cpu/pc_event.hh" 37#include "base/trace.hh" 38#include "sim/universe.hh" 39 40#ifdef FULL_SYSTEM 41#include "targetarch/arguments.hh" 42#include "targetarch/pmap.h" 43#include "targetarch/kernel.hh" 44#include "mem/functional_mem/memory_control.hh" 45#include "cpu/full_cpu/cpu.hh" 46#include "sim/system.hh" 47#include "cpu/full_cpu/bpred.hh" 48#endif 49 50using namespace std; 51 52PCEventQueue::PCEventQueue() 53{} 54 55PCEventQueue::~PCEventQueue() 56{} 57 58bool 59PCEventQueue::remove(PCEvent *event) 60{ 61 int removed = 0; 62 range_t range = equal_range(event); 63 for (iterator i = range.first; i != range.second; ++i) { 64 if (*i == event) { 65 DPRINTF(PCEvent, "PC based event removed at %#x: %s\n", 66 event->pc(), event->descr()); 67 pc_map.erase(i); 68 ++removed; 69 } 70 } 71 72 return removed > 0; 73} 74 75bool 76PCEventQueue::schedule(PCEvent *event) 77{ 78 pc_map.push_back(event); 79 sort(pc_map.begin(), pc_map.end(), MapCompare()); 80 81 DPRINTF(PCEvent, "PC based event scheduled for %#x: %s\n", 82 event->pc(), event->descr()); 83 84 return true; 85} 86 87bool 88PCEventQueue::service(ExecContext *xc) 89{ 90 Addr pc = xc->regs.pc; 91 int serviced = 0; 92 range_t range = equal_range(pc); 93 for (iterator i = range.first; i != range.second; ++i) { 94 // Make sure that the pc wasn't changed as the side effect of 95 // another event. This for example, prevents two invocations 96 // of the SkipFuncEvent. Maybe we should have separate PC 97 // event queues for each processor? 98 if (pc != xc->regs.pc) 99 continue; 100 101 DPRINTF(PCEvent, "PC based event serviced at %#x: %s\n", 102 (*i)->pc(), (*i)->descr()); 103 104 (*i)->process(xc); 105 ++serviced; 106 } 107 108 return serviced > 0; 109} 110 111void 112PCEventQueue::dump() const 113{ 114 const_iterator i = pc_map.begin(); 115 const_iterator e = pc_map.end(); 116 117 for (; i != e; ++i) 118 cprintf("%d: event at %#x: %s\n", curTick, (*i)->pc(), 119 (*i)->descr()); 120} 121 122PCEventQueue::range_t 123PCEventQueue::equal_range(Addr pc) 124{ 125 return std::equal_range(pc_map.begin(), pc_map.end(), pc, MapCompare()); 126} 127 128#ifdef FULL_SYSTEM 129void 130SkipFuncEvent::process(ExecContext *xc) 131{ 132 Addr newpc = xc->regs.intRegFile[ReturnAddressReg]; 133 134 DPRINTF(PCEvent, "skipping %s: pc=%x, newpc=%x\n", description, 135 xc->regs.pc, newpc); 136 137 xc->regs.pc = newpc; 138 xc->regs.npc = xc->regs.pc + sizeof(MachInst); 139 140 BranchPred *bp = xc->cpu->getBranchPred(); 141 if (bp != NULL) { 142 bp->popRAS(xc->thread_num); 143 } 144} 145 146void 147BadAddrEvent::process(ExecContext *xc) 148{ 149 // The following gross hack is the equivalent function to the 150 // annotation for vmunix::badaddr in: 151 // simos/simulation/apps/tcl/osf/tlaser.tcl 152 153 uint64_t a0 = xc->regs.intRegFile[ArgumentReg0]; 154 155 if (a0 < ALPHA_K0SEG_BASE || a0 >= ALPHA_K1SEG_BASE || 156 xc->memCtrl->badaddr(ALPHA_K0SEG_TO_PHYS(a0) & PA_IMPL_MASK)) { 157 158 DPRINTF(BADADDR, "badaddr arg=%#x bad\n", a0); 159 xc->regs.intRegFile[ReturnValueReg] = 0x1; 160 SkipFuncEvent::process(xc); 161 } 162 else 163 DPRINTF(BADADDR, "badaddr arg=%#x good\n", a0); 164} 165 166void 167PrintfEvent::process(ExecContext *xc) 168{ 169 if (DTRACE(Printf)) { 170 DebugOut() << curTick << ": " << xc->cpu->name() << ": "; 171 172 AlphaArguments args(xc); 173 Kernel::Printf(args); 174 } 175} 176 177void 178DebugPrintfEvent::process(ExecContext *xc) 179{ 180 if (DTRACE(DebugPrintf)) { 181 if (!raw) 182 DebugOut() << curTick << ": " << xc->cpu->name() << ": "; 183 184 AlphaArguments args(xc); 185 Kernel::Printf(args); 186 } 187} 188 189void 190DumpMbufEvent::process(ExecContext *xc) 191{ 192 if (DTRACE(DebugPrintf)) { 193 AlphaArguments args(xc); 194 Kernel::DumpMbuf(args); 195 } 196} 197#endif 198 199BreakPCEvent::BreakPCEvent(PCEventQueue *q, const std::string &desc, bool del) 200 : PCEvent(q, desc), remove(del) 201{ 202} 203 204void 205BreakPCEvent::process(ExecContext *xc) 206{ 207 debug_break(); 208 if (remove) 209 delete this; 210} 211 212#ifdef FULL_SYSTEM 213extern "C" 214void 215sched_break_pc_sys(System *sys, Addr addr) 216{ 217 PCEvent *event = new BreakPCEvent(&sys->pcEventQueue, "debug break", true); 218 event->schedule(addr); 219} 220 221extern "C" 222void 223sched_break_pc(Addr addr) 224{ 225 for (vector<System *>::iterator sysi = System::systemList.begin(); 226 sysi != System::systemList.end(); ++sysi) { 227 sched_break_pc_sys(*sysi, addr); 228 } 229 230} 231#endif 232