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X86: Fix how the TLB handles the storecheck flag.

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This commit is contained in:
Gabe Black 2009-04-19 04:57:51 -07:00
parent 0a6ff60caa
commit 6910baa015
1 changed files with 6 additions and 4 deletions
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10
src/arch/x86/tlb.cc
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@ -197,9 +197,6 @@ TLB::translate(RequestPtr req, ThreadContext *tc, Translation *translation,
int seg = flags & SegmentFlagMask;
//XXX Junk code to surpress the warning
if (storeCheck);
// If this is true, we're dealing with a request to read an internal
// value.
if (seg == SEGMENT_REG_MS) {
@ -579,7 +576,7 @@ TLB::translate(RequestPtr req, ThreadContext *tc, Translation *translation,
bool expandDown = false;
SegAttr attr = tc->readMiscRegNoEffect(MISCREG_SEG_ATTR(seg));
if (seg >= SEGMENT_REG_ES && seg <= SEGMENT_REG_HS) {
if (!attr.writable && mode == Write)
if (!attr.writable && (mode == Write || storeCheck))
return new GeneralProtection(0);
if (!attr.readable && mode == Read)
return new GeneralProtection(0);
@ -655,6 +652,11 @@ TLB::translate(RequestPtr req, ThreadContext *tc, Translation *translation,
// fine even though we're not checking them.
return new PageFault(vaddr, true, mode, inUser, false);
}
if (storeCheck && !entry->writable) {
// This would fault if this were a write, so return a page
// fault that reflects that happening.
return new PageFault(vaddr, true, Write, inUser, false);
}
DPRINTF(TLB, "Entry found with paddr %#x, "