the instruction pointer), and neither the SYSENTER nor the SYSEXIT instruction supports passing parameters on the stack.</p>
<p>To use the SYSENTER and SYSEXIT instructions as companion instructions for transitions between privilege level 3 code and privilege level 0 operating system procedures, the following conventions must be followed:</p>
<p>The SYSENTER and SYSEXIT instructions were introduced into the IA-32 architecture in the Pentium II processor. The availability of these instructions on a processor