[OpenBIOS] [PATCH 18/24] aout: implement load/init-program as per IEEE-1275 specification

Mark Cave-Ayland mark.cave-ayland at ilande.co.uk
Wed Sep 7 19:23:26 CEST 2016

On 06/09/16 21:47, BALATON Zoltan wrote:

>> (and I can't see how anyone would implement memcpy() backwards as it
>> would be extremely cache unfriendly). But feel free to point out sources
>> that suggest otherwise :)
> I can only point to documentation (e.g. man pages) that say that if
> memory regions are overlapping memcpy's behaviour is undefined but
> memmove is guaranteed to work so it's safer to use that for known
> overlapping regions. As in OpenBIOS we are using the built in
> implementations one can rely on the memcpy implementation but I think
> it's cleaner to use memmove here and not rely on something not
> guaranteed even if it happens to work.
> So this works both ways here just looks better with memmove IMO. This is
> not a real problem with this patch just a suggestion.

Sleeping on this, I've reconsidered and decided to switch to memmove()
since we can't guarantee that what happens to work now will always work
in future.

I won't bother reposting the patchset again, but I've updated it in my
local queue.



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