to CPL going back to non-CPL3 64-bit mode.</p>
<p>If the return code segment selector is NULL.</p></td></tr>
<tr>
<td>#GP(selector)</td>
<td>
<p>If the proposed segment descriptor for a code segment does not indicate it is a code segment.</p>
<p>If the proposed new code segment descriptor has both the D-bit and L-bit set.</p>
<p>If the DPL for a nonconforming-code segment is not equal to the RPL of the code segment selector.</p>
<p>If CPL is greater than the RPL of the code segment selector.</p>
<p>If the D