arch.x86.fault.btsse¶

Bad TSS Exception handler (CPU vector 10).

Overview¶

Handles the x86 Invalid TSS exception (#TS, vector 10), which is raised when the processor detects an invalid Task State Segment during a task switch or interrupt delivery that involves a privilege level change. The handler disables interrupts and triggers a kernel panic.

Dependencies¶

arch.x86.util
arch.x86.panic
arch.x86.isr.types
arch.x86.isr.mgr
arch.x86.idt

Functions and Procedures¶

register¶

procedure register();

Registers the bad TSS handler with arch.x86.isr.mgr at ISR vector 10. Must be called during fault subsystem initialisation.

Notes¶

The handler calls correctInterruptRegisters(true) because vector 10 pushes an error code encoding the TSS segment selector that caused the fault.
After adjusting register pointers, x86_panic is called with fault identifier 'arch.x86.fault.btsse' and description 'Bad TSS Exception.'.