Can you attach/detach different high level int handlers?

[OSCPUDEV]

I would like to be able to switch between several different high level ISR's. Is this possible? It seems that the typical way to even have a high level int handler is using an assembly file, and the compiler magically replaces the system handler with whatever you have in your .S file with the xt_highint5: label.

Is there a system function that will actually add/remove the ISR pointer?

Thanks!