Detection of JSR or JSL

I have a routine in bank C0 that store an offset in $1A. However I would like to use this routine from bank C1. Is there something I could do in my routine to detect if I'm coming from a JSL or JSR then branch to either a RTS or a RTL depending of the case?

Not really, but there is this method that I've used before.

https://www.ff6hacking.com/forums/showth...p?tid=2301