diff options
| -rw-r--r-- | src/arch/x86/tlb.cc | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/arch/x86/tlb.cc b/src/arch/x86/tlb.cc index f5e214a88..5d101a5ae 100644 --- a/src/arch/x86/tlb.cc +++ b/src/arch/x86/tlb.cc @@ -571,6 +571,9 @@ TLB::translate(RequestPtr &req, ThreadContext *tc, bool write, bool execute) // If we're not in 64-bit mode, do protection/limit checks if (!efer.lma || !csAttr.longMode) { DPRINTF(TLB, "Not in long mode. Checking segment protection.\n"); + // Check for a NULL segment selector. + if (!tc->readMiscRegNoEffect(MISCREG_SEG_SEL(seg))) + return new GeneralProtection(0); SegAttr attr = tc->readMiscRegNoEffect(MISCREG_SEG_ATTR(seg)); if (!attr.writable && write) return new GeneralProtection(0); |