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| author | Gabe Black <gblack@eecs.umich.edu> | 2009-04-19 03:41:10 -0700 |
|---|---|---|
| committer | Gabe Black <gblack@eecs.umich.edu> | 2009-04-19 03:41:10 -0700 |
| commit | 3b1b21cb159c0368d50aa0dedd39a8874d91e735 (patch) | |
| tree | 78d9d537e6f0c47469a77501df72cc4668f76a59 /src/arch/x86 | |
| parent | a0cc081997759399a124e47e637006d0b4fc15ac (diff) | |
| download | gem5-3b1b21cb159c0368d50aa0dedd39a8874d91e735.tar.xz | |
X86: Some segment selectors can be used when "NULL".
Diffstat (limited to 'src/arch/x86')
| -rw-r--r-- | src/arch/x86/tlb.cc | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/arch/x86/tlb.cc b/src/arch/x86/tlb.cc index 62d694225..330a8682b 100644 --- a/src/arch/x86/tlb.cc +++ b/src/arch/x86/tlb.cc @@ -571,7 +571,10 @@ TLB::translate(RequestPtr req, ThreadContext *tc, Translation *translation, 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))) + if (!(seg == SEGMENT_REG_TSG || seg == SYS_SEGMENT_REG_IDTR || + seg == SEGMENT_REG_HS || seg == SEGMENT_REG_LS || + seg == SEGMENT_REG_MS) + && !tc->readMiscRegNoEffect(MISCREG_SEG_SEL(seg))) return new GeneralProtection(0); bool expandDown = false; SegAttr attr = tc->readMiscRegNoEffect(MISCREG_SEG_ATTR(seg)); |