From: "H. Peter Anvin" <hpa@zytor.com>
To: linux-kernel@vger.kernel.org
Subject: Re: [patch] clone_startup(), 2.5.31-A0
Date: 13 Aug 2002 12:52:11 -0700 [thread overview]
Message-ID: <ajbo1b$e2a$1@cesium.transmeta.com> (raw)
In-Reply-To: 15705.13490.713278.815154@napali.hpl.hp.com
Followup to: <15705.13490.713278.815154@napali.hpl.hp.com>
By author: David Mosberger <davidm@napali.hpl.hp.com>
In newsgroup: linux.dev.kernel
>
> The original clone() system call was misdesigned. Even if you chose
> to ignore ia64, clone() cannot be used by portable applications to
> specify a stack (think "stack-growth direction").
>
This is something that can be handled in userspace on most
architectures. The rest (ia64) can pass all the information on to
kernel space.
The clone() system call cannot be used by portable applications *AT
ALL*, since it inherently needs a user-space assembly wrapper. It's
just a matter of how you define the interface to the assembly wrapper.
-hpa
--
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
http://www.zytor.com/~hpa/puzzle.txt <amsp@zytor.com>
next prev parent reply other threads:[~2002-08-13 19:48 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-08-13 15:09 [patch] clone_startup(), 2.5.31-A0 Ingo Molnar
2002-08-13 15:30 ` Linus Torvalds
2002-08-13 15:44 ` Christoph Hellwig
2002-08-13 16:01 ` Linus Torvalds
2002-08-13 16:05 ` Christoph Hellwig
2002-08-13 16:20 ` Linus Torvalds
2002-08-13 18:32 ` [patch] CLONE_SETTLS, CLONE_SETTID, 2.5.31-BK Ingo Molnar
2002-08-13 18:41 ` Linus Torvalds
2002-08-13 19:09 ` Ingo Molnar
2002-08-13 19:41 ` Linus Torvalds
2002-08-13 19:41 ` Ingo Molnar
2002-08-13 19:35 ` Ingo Molnar
2002-08-15 22:38 ` [patch] complain about unknown CLONE_* flags Jamie Lokier
2002-08-16 10:17 ` Ingo Molnar
2001-11-02 5:55 ` Pavel Machek
2002-08-13 16:09 ` [patch] clone_startup(), 2.5.31-A0 Erik Andersen
2002-08-13 16:11 ` Christoph Hellwig
2002-08-13 16:32 ` David Mosberger
2002-08-13 16:44 ` John Levon
2002-08-13 19:52 ` H. Peter Anvin [this message]
2002-08-13 20:19 ` David Mosberger
2002-08-13 20:27 ` H. Peter Anvin
2002-08-13 20:52 ` David Mosberger
2002-08-13 20:57 ` H. Peter Anvin
2002-08-13 16:56 ` Ruth Ivimey-Cook
2002-08-13 17:42 ` Richard B. Johnson
2002-08-13 17:19 ` Ingo Molnar
2002-08-13 20:35 ` Kai Henningsen
2002-08-15 21:24 ` Thunder from the hill
2002-08-13 17:27 ` Ingo Molnar
2002-08-14 13:48 ` Rusty Russell
2002-08-14 18:47 ` Jamie Lokier
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