"Of course it does, in fact you just said it yourself - long jumps. Back in late 90s I worked with the firmware for the Point of Sale terminals, PIN pads, etc.

"Of course it does, in fact you just said it yourself - long jumps. Back in late 90s I worked with the firmware for the Point of Sale terminals, PIN pads, etc. It was written in C and its error handling was exception-based. Behind the scenes it was just a handful of long/setjmp wrappers, but it did nevertheless implement semantics of try/catch/etc." David Hanson's book "C Interfaces and Implementations" explains how this is done and provides (very high quality) source code you can use/learn from.