x64: Watchdog Timeout Feature

This additional software is new in the Solaris Express 1/06 release.

The Watchdog mechanism detects a system hang. This feature is a timer that is continually reset by a user application as long as the operating system and user application are running. While the watchdog timer is operating in application mode, an additional alarm function, Alarm 3, is available to generate alarms in case of critical problems in the user application.