From mboxrd@z Thu Jan  1 00:00:00 1970
MIME-Version: 1.0
In-Reply-To: <2b93b6bcf93d8d06edb6ac3a173ade68@proxima.alt.za>
References: <2b93b6bcf93d8d06edb6ac3a173ade68@proxima.alt.za>
Date: Wed, 13 May 2009 15:00:02 -0700
Message-ID: <dd6fe68a0905131500n5d846348p24c6f3bfb95264e7@mail.gmail.com>
Subject: Re: [9fans] P9P on Lemote Yeeloong
From: Russ Cox <rsc@swtch.com>
To: lucio@proxima.alt.za,
	Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
Topicbox-Message-UUID: f9c35e16-ead4-11e9-9d60-3106f5b1d025

I don't know that p9p has ever been built
on a MIPS machine, so you might run into
more problems after this one.

You are almost certainly running Linux 2.6
so you shouldn't need to edit u.h -- it should
be using pthreads already.

You probably need to edit src/libthread/sysofiles.sh
to add a

case mips-Linux-2.6.*)
    echo pthread.o Linux-mips-context.o
    ;;

Then you'll need to write Linux-mips-context.S and mips-context.h
to provide useful versions of getcontext and setcontext
and change threadimpl.h to use them on MIPS (like it does
for __APPLE__ and __OpenBSD__).

I looked around but I don't think I have any such
implementations lying around.  They're not too hard:
just save and restore every register (technically,
just the callee-saves, but I'm too lazy to look up
which ones are which and too paranoid to trust
them not to change).

Russ