I'm working on a new bootloader for an 8051 variant that has flash, but no bootloader ROM (F34x). My normal (non-bootloader) application has some of the same functions as the bootloader does (init serial, burn flash, erase flash, etc). Has anyone implemented a method to call their own bootloader functions from their application?

I assume one would have to expose some common vector table or similar because if the bootloader firmware changes over time, you'd still want to be able to access the functions (E.g. don't hard code the bootloader addresses in the application). A decent software interrupt would be handy here I guess...