Interrupt Service Routine

I’m working with QNX Momentics and I have to use the UART Interrupt. But how? I didn’t find a documentation about that. Most compilers have #pramga interrupt, (attribute)(INTERUPT) or something like that. But what about the gcc-Compiler in QNX Momenticx.

I’m using a PowerPC (e300 core, based on 604). I need the Interrupts in the Bootloader not in QNX!

Why do you need an interrupt handler in the boot loader? In the boot loader you only have one thread (if I may call it that), so it would seem that an interrupt handler would be an unnecessary complication, unless you are trying to fabricate a 2nd thread this way.