Re: Did you get confused again? You seem eaily bewildered.

I am not sure how much can be done with Posix functions, but any
self-respectiong Unix allows you essentially the same freedom
as hardware exception handler.  That is you can change CPU registers
and program memory in whatever way you need and then restart
the program.  If you change program counter to point to handler code
within the faulting function, then you will restart the current
function.