[TUHS] Re: Any UNIX With No C In Userland?

At Wed, 5 Mar 2025 10:54:01 +1100, Rob Pike <robpike(a)gmail.com> wrote: Subject: [TUHS] Re: Any UNIX With No C In Userland? Not "must" -- "can". Of course that's just effectively using the compiler to do the marshalling -- at compile time. There are caveats of course -- one can lay out bit flags for a register in a struct, but one must not make a pointer to such a struct and point it at the register and expect bit manipulations to work -- even with -O0 you'll probably mess up any attempts to change bits predictably in that register in ways that the hardware expects. Of course the same problems occur if you try to point a word-sized integer, even one with a "volatile" qualifier, at a register and manipulate its bits with C bitwise expressions. -- Greg A. Woods <gwoods(a)acm.org> Kelowna, BC +1 250 762-7675 RoboHack <woods(a)robohack.ca> Planix, Inc. <woods(a)planix.com> Avoncote Farms <woods(a)avoncote.ca>