Portability: Difference between revisions

Targeted code can be further divided into two categories: architecture-specific code and machine-specific code. Architecture-specific code is code that differs between different processor architectures, like I/O, trap dispatching, and paging. Machine-specific code is code that differs between machines with the same processor architectures, like IRQ controllers, system timers, real time clocks, and multiprocessor information. The NT kernel has a module containing machine-specific code called the Hardware Abstraction Layer, or HAL.

 

After the targeted files are separated, you can make new targeted functions for each platform you want to port to. The generic code will (usually) run without issue on top of the targeted code. A brief side note, make sure to delete the object files after you re-target, as object files are not cross compatible.