[TUHS] asm helper routines in v7

[Warner Losh]

On Wed, Jan 5, 2022, 8:27 PM Douglas McIlroy <douglas.mcilroy at dartmouth.edu>
wrote:

> > It would be nice to hear about the rationale from a primary source.
>
> Assembly language was deemed a last resort, especially as portability
> was coming to the fore. As I wrote in A Research Unix Reader,
> "Assembly language and magic constants gradually declined from the
> status of the 'real truth' (v4) to utterly forgotten (v8)." In v7,
> assembler usage was demoted to the bottom of syscall man pages. It
> could also be found in /usr/src/libc/sys/*.s
>


That makes a lot of sense. I've found errors and omissions in the assembler
documentation for the odd system call for V7 and System III ports. A little
sloppy I thought when I noticed.  I'll have to see if I can dig one up
again...

Warner

>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://minnie.tuhs.org/pipermail/tuhs/attachments/20220105/db8f4ac5/attachment.htm>