From: Vince Weaver <vince@csl.cornell.edu>
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] alpha - syscalls can return two values
Date: Wed, 12 Nov 2008 16:34:38 -0500 (EST) [thread overview]
Message-ID: <20081112163231.G70715@stanley.csl.cornell.edu> (raw)
In-Reply-To: <20081111152045.C64870@stanley.csl.cornell.edu>
and to keep correcting myself, it seems like the Alpha multi-value
return syscalls do not in fact use the stack at all.
I'm just posting this to clear up what I posted earlier.
What happens is:
normal return value goes into $v0 (as always)
errno is put into $a3 (as always)
secondary return value is placed into $a4.
I have a patch that implements this that I'll send in a separate e-mail.
Vince
prev parent reply other threads:[~2008-11-12 21:34 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-11 20:14 [Qemu-devel] alpha - syscalls can return two values Vince Weaver
2008-11-11 20:23 ` Vince Weaver
2008-11-12 21:34 ` Vince Weaver [this message]
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