US Patent 9483283 Enhanced code callback

Implementations are disclosed herein for enhancing swizzling technology. In at least one implementation, functions are hooked by modifying their machine code implementations to jump to a central callback function. The central callback function may then route to other target functions that serve to replace the hooked functions. In another implementation, the machine code implementations are modified to jump to intermediate functions. The intermediate functions invoke dispatch functions that can call into a central callback function. The central callback function may return to the hooked functions.