faults.cc revision 4184
12SN/A/* 21762SN/A * Copyright (c) 2003-2005 The Regents of The University of Michigan 32SN/A * All rights reserved. 42SN/A * 52SN/A * Redistribution and use in source and binary forms, with or without 62SN/A * modification, are permitted provided that the following conditions are 72SN/A * met: redistributions of source code must retain the above copyright 82SN/A * notice, this list of conditions and the following disclaimer; 92SN/A * redistributions in binary form must reproduce the above copyright 102SN/A * notice, this list of conditions and the following disclaimer in the 112SN/A * documentation and/or other materials provided with the distribution; 122SN/A * neither the name of the copyright holders nor the names of its 132SN/A * contributors may be used to endorse or promote products derived from 142SN/A * this software without specific prior written permission. 152SN/A * 162SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 172SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 182SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 192SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 202SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 212SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 222SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 232SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 242SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 252SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 262SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 272665Ssaidi@eecs.umich.edu * 282665Ssaidi@eecs.umich.edu * Authors: Nathan Binkert 292665Ssaidi@eecs.umich.edu * Gabe Black 302SN/A */ 312SN/A 324183Sgblack@eecs.umich.edu#include "arch/isa_traits.hh" 332439SN/A#include "base/misc.hh" 342680Sktlim@umich.edu#include "cpu/thread_context.hh" 352222SN/A#include "cpu/base.hh" 364183Sgblack@eecs.umich.edu#include "sim/faults.hh" 374183Sgblack@eecs.umich.edu#include "sim/process.hh" 384183Sgblack@eecs.umich.edu#include "mem/page_table.hh" 392SN/A 402201SN/A#if !FULL_SYSTEM 412680Sktlim@umich.eduvoid FaultBase::invoke(ThreadContext * tc) 422201SN/A{ 433363Sstever@eecs.umich.edu fatal("fault (%s) detected @ PC %p", name(), tc->readPC()); 442201SN/A} 452222SN/A#else 462680Sktlim@umich.eduvoid FaultBase::invoke(ThreadContext * tc) 472222SN/A{ 482680Sktlim@umich.edu DPRINTF(Fault, "Fault %s at PC: %#x\n", name(), tc->readPC()); 492680Sktlim@umich.edu tc->getCpuPtr()->recordEvent(csprintf("Fault %s", name())); 502222SN/A 512680Sktlim@umich.edu assert(!tc->misspeculating()); 522222SN/A} 532201SN/A#endif 542612SN/A 552680Sktlim@umich.eduvoid UnimpFault::invoke(ThreadContext * tc) 562612SN/A{ 572612SN/A panic("Unimpfault: %s\n", panicStr.c_str()); 582612SN/A} 594184Ssaidi@eecs.umich.edu#if !FULL_SYSTEM 604183Sgblack@eecs.umich.eduvoid PageTableFault::invoke(ThreadContext *tc) 614183Sgblack@eecs.umich.edu{ 624183Sgblack@eecs.umich.edu Process *p = tc->getProcessPtr(); 634183Sgblack@eecs.umich.edu 644183Sgblack@eecs.umich.edu // We've accessed the next page of the stack, so extend the stack 654183Sgblack@eecs.umich.edu // to cover it. 664183Sgblack@eecs.umich.edu if(vaddr < p->stack_min && vaddr >= p->stack_min - TheISA::PageBytes) 674183Sgblack@eecs.umich.edu { 684183Sgblack@eecs.umich.edu p->stack_min -= TheISA::PageBytes; 694183Sgblack@eecs.umich.edu if(p->stack_base - p->stack_min > 8*1024*1024) 704183Sgblack@eecs.umich.edu fatal("Over max stack size for one thread\n"); 714183Sgblack@eecs.umich.edu p->pTable->allocate(p->stack_min, TheISA::PageBytes); 724183Sgblack@eecs.umich.edu warn("Increasing stack size by one page."); 734183Sgblack@eecs.umich.edu } 744183Sgblack@eecs.umich.edu // Otherwise, we have an unexpected page fault. Report that fact, 754183Sgblack@eecs.umich.edu // and what address was accessed to cause the fault. 764183Sgblack@eecs.umich.edu else 774183Sgblack@eecs.umich.edu { 784183Sgblack@eecs.umich.edu panic("Page table fault when accessing virtual address %#x\n", vaddr); 794183Sgblack@eecs.umich.edu } 804183Sgblack@eecs.umich.edu} 814184Ssaidi@eecs.umich.edu#endif 82