How to Stop INT
Posted: Wed Nov 29, 2006 2:35 pm
How would i stop Applicatons from calling Interupts?
In realmode, you dont.
In protected mode, each interrupt gate or trap gate in the IDT has a DPL, which is set to the lowest privilege level able to call it. if you for instance set it to 2, code executing at ring 2, 1 and 0 can call the interrupt. However, code executing at ring 3 will cause a GPF when they try to call that interrupt.