linux-kernel - Re: [PATCH 00/23] tracehook

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Message-Id: <20080721.081844.221647067.davem@davemloft.net>
Date:	Mon, 21 Jul 2008 08:18:44 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	roland@...hat.com
Cc:	akpm@...ux-foundation.org, torvalds@...ux-foundation.org,
	mingo@...e.hu, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 00/23] tracehook

From: Roland McGrath <roland@...hat.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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