RE: Why does MIPS/Linux always reserve 32 bytes in the top of each process's kernel stack space

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To: "zhan rongkai" <zhanrk@xxxxxxxxx>, <linux-mips@xxxxxxxxxxxxxx>
Subject: RE: Why does MIPS/Linux always reserve 32 bytes in the top of each process's kernel stack space
From: "David Daney" <ddaney@xxxxxxxxxx>
Date: Thu, 27 Jan 2005 20:54:48 -0800
Original-recipient: rfc822;linux-mips@linux-mips.org
Sender: linux-mips-bounce@xxxxxxxxxxxxxx
Thread-index: AcUE5XzG74m1xiQ4QIOuuXmJmbA9FQAD13N+
Thread-topic: Why does MIPS/Linux always reserve 32 bytes in the top of each process's kernel stack space

zhan rongkai wrote:

>Why does MIPS/Linux always reserve 32 bytes in the top of each
>process's kernel stack space.

Perhaps because the  kernel's ABI requires it?   I beleive that o64 requires stack space for a0 - a3 to be stored there.
 
David Daney

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