Hello
VECTOR 0 _Startup is initializing memory at 0xFFFE-0xFFFF with address of function _STartup.
Depending on how your application is build up, you may already initialize this vector table entry in your application (either with a constant table of function pointers or specifying a vector number together with the interrupt keyword.
If you look at the .map file generated by the linker you should be able to figure out what is allocated at 0xFFFE-0xFFFF.
I hope this helps.
CrasyCat