Error Handling

PALcode

In handling errors, the PALcode is responsible for parsing the exception and building the machine check logout frame. The PALcode is responsible for the following actions:

• Examines all error bits
• Decides on the nature of the machine check or interrupt
• Performs corrective action, if possible
• Builds Corrected Error Frame or Machine Check Logout Frame
• Builds Stack Frame
• Clears error bits
• Passes control to the operating system through System Control Block

Operating System

The Operating System machine check handler is responsible for the following actions:

• Creates Kernel Event Header Frame
• Appends the Corrected Error Frame or Machine Check Logout Frame
• Updates Error Log
• Executes fault analysis using the saved machine check frame and context