# What happens before main in AVR32 UC3

Example projects in AVR32 Studio use a two-step startup procedure that occurs in the following order

1. trampoline.x

It is used to bypass the bootloader. If you see the following linker instructions in the command line you’re using this code file -Wl,-e,_trampoline. Once done, it jumps to code section _stext.

2. crt0.x

_stext code section entry point is situated in this file. Once done, it jumps to main.