[syslinux] com32: custom int3 handler

[H. Peter Anvin]

Jeff Kalikstein wrote:
> 
>         __asm__("sidt (%0)" :: "r"(&idtr));
> 
>         unsigned long *idt = (void*)idtr.base;
>         idt[3] = int3_handler;
> 

Check the format of an IDT descriptor; this isn't it.

	-hpa