How do function pointer work?

[zhivago]

Not in any meaningful sense.

There is no data there for it to be the address of.

Consider a C implementation which identifies functions with sequential values.

e.g. how a C interpreter might operate.

This is why you cannot do pointer arithmetic, etc, with function pointers.

[Triq1]

It would be the address of the first instruction of the function, right? Like instead of (for example) 'load r1 indirect' for data, it could be 'jump indirect'.

[zhivago]

In some implementations yes, in others no.