Date: Mon, 21 Jul 2008 08:18:44 -0700 (PDT)
Message-Id: <20080721.081844.221647067.davem@davemloft.net>
To: roland@redhat.com
Cc: akpm@linux-foundation.org, torvalds@linux-foundation.org, mingo@elte.hu,
       linux-kernel@vger.kernel.org
Subject: Re: [PATCH 00/23] tracehook
From: David Miller <davem@davemloft.net>
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From: Roland McGrath <roland@redhat.com>
Date: Mon, 21 Jul 2008 03:54:31 -0700 (PDT)

> > The other arch's with compat support will have this same exact issue.
> 
> They don't seem to.

Look at S390 and PowerPC, they do the sign extension cases as well.

PowerPC does it with C level stubs, whereas I believe S390 uses a
similar assembler stub scheme as sparc64.

But you are right, this is probably not an issue, and providing 32-bit
truncated incoming args, and letting the tracer do whatever it likes
for outgoing args, should work just fine.
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