Identifies and manages stub functions in a binary

Identifies functions that are stubs and redirects calls to stubs to the calls to the implemenations, in case if the latter is present in the binary.

A stub is piece of binary code that is used to call a function implementation. Most commonly stubs are employed for external functions, whose implementation is later loaded from some library, however some ABIs are using stubs for internal functions, in case if they have external linkage.