From 54fc750924ebeeb34d598018b664a886cc3f7ac5 Mon Sep 17 00:00:00 2001 From: Gabe Black Date: Wed, 7 Mar 2007 20:04:46 +0000 Subject: Move the magic m5 PageTableFault into sim/faults.[hh,cc] since it's the same across all architectures. --HG-- extra : convert_revision : 18d441eb7ac44df4df41771bfe3dec69f7fa70ec --- src/sim/faults.cc | 27 ++++++++++++++++++++++++++- 1 file changed, 26 insertions(+), 1 deletion(-) (limited to 'src/sim/faults.cc') diff --git a/src/sim/faults.cc b/src/sim/faults.cc index cea35482a..7aa3ec4a1 100644 --- a/src/sim/faults.cc +++ b/src/sim/faults.cc @@ -29,10 +29,13 @@ * Gabe Black */ +#include "arch/isa_traits.hh" #include "base/misc.hh" -#include "sim/faults.hh" #include "cpu/thread_context.hh" #include "cpu/base.hh" +#include "sim/faults.hh" +#include "sim/process.hh" +#include "mem/page_table.hh" #if !FULL_SYSTEM void FaultBase::invoke(ThreadContext * tc) @@ -53,3 +56,25 @@ void UnimpFault::invoke(ThreadContext * tc) { panic("Unimpfault: %s\n", panicStr.c_str()); } + +void PageTableFault::invoke(ThreadContext *tc) +{ + Process *p = tc->getProcessPtr(); + + // We've accessed the next page of the stack, so extend the stack + // to cover it. + if(vaddr < p->stack_min && vaddr >= p->stack_min - TheISA::PageBytes) + { + p->stack_min -= TheISA::PageBytes; + if(p->stack_base - p->stack_min > 8*1024*1024) + fatal("Over max stack size for one thread\n"); + p->pTable->allocate(p->stack_min, TheISA::PageBytes); + warn("Increasing stack size by one page."); + } + // Otherwise, we have an unexpected page fault. Report that fact, + // and what address was accessed to cause the fault. + else + { + panic("Page table fault when accessing virtual address %#x\n", vaddr); + } +} -- cgit v1.2.3