Re: [PATCH mig] Make MIG work for pure 64 bit kernel and userland.

[Luca]

Il 12/02/23 17:05, Sergey Bugaev ha scritto:
> On Sun, Feb 12, 2023 at 7:01 PM Luca <luca@orpolo.org> wrote:
> > It seems XNU's mig [0] always sets the alignment to natural_t (=4) with
> > a #pragma... I still have to understand how they handle these issues.
>
> Please note that XNU uses "untyped messaging", and Apple's version of
> MIG is "untyped MIG". They don't have the kernel parse the message
> body, it just passes it to the receiver task as a blob, where it's up
> to MIG again to make sense of it.

It seems the body is parsed more or less in the same way as in gnumach, 
at least to translate ports. Other fields seems just forwarded to the 
mig stubs, also as in gnumach. Could you be more specific about the 
"untyped messaging"?


Luca