diff --git a/src/arch/x86/faults.cc b/src/arch/x86/faults.cc
index 209f3e8726..235f75ad48 100644
--- a/src/arch/x86/faults.cc
+++ b/src/arch/x86/faults.cc
@@ -74,7 +74,10 @@ X86FaultBase::invoke(ThreadContext *tc, const StaticInstPtr &inst)
         entry = isSoft() ? extern_label_longModeSoftInterrupt :
                            extern_label_longModeInterrupt;
     } else {
-        entry = extern_label_legacyModeInterrupt;
+        if (m5reg.submode == RealMode)
+            entry = extern_label_realModeInterrupt;
+        else
+            entry = extern_label_legacyModeInterrupt;
     }
     tc->setIntReg(INTREG_MICRO(1), vector);
     tc->setIntReg(INTREG_MICRO(7), pc.pc());
diff --git a/src/arch/x86/isa/insts/romutil.py b/src/arch/x86/isa/insts/romutil.py
index fd06197193..847b9c4b10 100644
--- a/src/arch/x86/isa/insts/romutil.py
+++ b/src/arch/x86/isa/insts/romutil.py
@@ -216,4 +216,54 @@ def rom
     halt
     eret
 };
+
+def rom
+{
+    extern realModeInterrupt:
+
+    # t1 - The vector.
+    # t2 - The old CS.
+    # t7 - The old RIP.
+    # t3 - RFLAGS
+    # t4 - The new CS.
+    # t5 - The new RIP.
+
+    rdsel t2, cs, dataSize=8
+    rflags t3, dataSize=8
+
+    ld t4, idtr, [4, t1, t0], 2, dataSize=2, addressSize=2
+    ld t5, idtr, [4, t1, t0], dataSize=2, addressSize=2
+
+    # Make sure pushes after the first will also work.
+    cda ss, [1, t0, rsp], -4, dataSize=2, addressSize=2
+    cda ss, [1, t0, rsp], -6, dataSize=2, addressSize=2
+
+    # Push the low 16 bits of RFLAGS.
+    st t3, ss, [1, t0, rsp], -2, dataSize=2, addressSize=2
+    # Push CS.
+    st t2, ss, [1, t0, rsp], -4, dataSize=2, addressSize=2
+    # Push the old RIP.
+    st t7, ss, [1, t0, rsp], -6, dataSize=2, addressSize=2
+
+    # Update RSP.
+    subi rsp, rsp, 6, dataSize=2
+
+    # Set the new CS selector.
+    wrsel cs, t4, dataSize=2
+    # Make sure there isn't any junk in the upper bits of the base.
+    mov t4, t0, t4, dataSize=2
+    # Compute and set CS base.
+    slli t4, t4, 4, dataSize=8
+    wrbase cs, t4, dataSize=8
+
+    # If IF or TF are set, we want to flip them.
+    limm t6, "(TFBit | IFBit)", dataSize=8
+    and t6, t6, t3, dataSize=8
+    wrflags t3, t6, dataSize=8
+
+    # Set the new RIP.
+    wrip t5, t0, dataSize=2
+
+    eret
+};
 '''