For those interested, Linux has a remarkably interesting way to determine whether to use the modern sysenter/sysexit routines or the ancient 0x80 interrupt vect

For those interested, Linux has a remarkably interesting way to determine whether to use the modern sysenter/sysexit routines or the ancient 0x80 interrupt vector. http://www.trilithium.com/johan/2005/08/linux-gate/ http://www.trilithium.com/johan/2005/08/linux-gate/ discuses the system quite nicely.