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To: KATO Takenori <kato@eclogite.eps.nagoya-u.ac.jp>
cc: current@FreeBSD.org
Subject: Re: TSS broken 
In-reply-to: Your message of "Mon, 01 Jan 1996 11:50:18 +0900."
             <199601010250.LAA00929@marble.eps.nagoya-u.ac.jp> 
From: David Greenman <davidg@Root.COM>
Reply-To: davidg@Root.COM
Date: Thu, 01 Feb 1996 03:28:58 -0800
Sender: owner-current@FreeBSD.org
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   Gack, I said:

>the call was made. The stack layout looks like this:
>
>...
>address of caller (?)
>auto variables used in mi_switch
>arguments to cpu_switch (proc)
>address of caller (mi_switch)
>auto variables used in cpu_switch
>arguments to savectx (pcb)
>address of caller (cpu_switch)

   Actually, the stack layout is:

...
address of caller (fork1)
auto variables used in vm_fork
arguments to cpu_fork (proc1, proc2)
address of caller (vm_fork)
auto variables used in cpu_fork
arguments to savectx (pcb)
address of caller (cpu_fork)


   The "switch" code I mentioned previously has nothing to do with this. :-)
...nonetheless, all of my comments still hold generally - I'm pretty sure that
you've misunderstood the operation of the 'leal' instruction. The code as I've
written it appears to be correct.

-DG

David Greenman
Core Team/Principal Architect, The FreeBSD Project