Incrementing function pointers

Question

I just learned about function pointers (pointers pointing at the adress where where the machine code of a function is stored). This made me think about machine code and how

Answer 1

You can (or at least could) do something like this, but it's decidedly non-trivial. First of all, you can't actually increment or decrement a function pointer -- it points to an address, but pointer math is normally done in increments of sizeof(pointed to type) -- but with a function, that isn't meaningful, so you can't do math on it.

Most debuggers work (primarily) by using debugging information that relates address to line numbers, function names, variable names, etc.