diff options
| -rw-r--r-- | src/arch/x86/tlb.cc | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/arch/x86/tlb.cc b/src/arch/x86/tlb.cc index 372c8b997..603d4e45f 100644 --- a/src/arch/x86/tlb.cc +++ b/src/arch/x86/tlb.cc @@ -649,6 +649,18 @@ TLB::translate(RequestPtr req, ThreadContext *tc, #endif } // Do paging protection checks. + bool inUser = (csAttr.dpl == 3 && + !(flags & (CPL0FlagBit << FlagShift))); + if (inUser && !entry->user || + write && !entry->writable) { + // The page must have been present to get into the TLB in + // the first place. We'll assume the reserved bits are + // fine even though we're not checking them. + return new PageFault(vaddr, true, write, + inUser, false, execute); + } + + DPRINTF(TLB, "Entry found with paddr %#x, " "doing protection checks.\n", entry->paddr); Addr paddr = entry->paddr | (vaddr & (entry->size-1)); |