On Wed, May 19, 2021 at 06:42:40PM +1000, Nicholas Piggin wrote: > Excerpts from Joakim Tjernlund's message of May 19, 2021 6:08 pm: > > I always figured the ppc way was superior. It begs the question if not the other archs should > > change instead? > > It is superior in some ways, not enough to be worth being different. The PowerPC syscall ABI *requires* using cr0.3 for indicating errors, you will have to do that whether you conflate the concepts of return code and error indicator or not! > Other archs are unlikely to change because it would be painful for > not much benefit. Other archs cannot easily change for much the same reason :-) > New system calls just should be made to not return > error numbers. Which sometimes is a difficult / non-natural / clumsy thing to do. Segher
