arch.x86.fault.dbge¶

Debug Exception handler (CPU vector 1).

Overview¶

Handles the x86 Debug exception (#DB, vector 1), which is raised for single-step traps, hardware breakpoints, and other debug conditions. In the current implementation, this exception is treated as fatal 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 debug exception handler with arch.x86.isr.mgr at ISR vector 1. Must be called during fault subsystem initialisation.

Notes¶

The handler calls correctInterruptRegisters(false) because vector 1 does not push an error code.
After adjusting register pointers, x86_panic is called with fault identifier 'arch.x86.fault.dbge' and description 'Debug Exception.'.
The debug exception can fire as either a fault or a trap depending on the specific debug condition. No distinction is currently made.