From: Rene Herman <rene.herman@gmail.com>
To: Amit Choudhary <amit2030@yahoo.com>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: [DISCUSS] Making system calls more portable.
Date: Sun, 07 Jan 2007 09:25:00 +0100 [thread overview]
Message-ID: <45A0AE5C.6010801@gmail.com> (raw)
In-Reply-To: <722886.55398.qm@web55601.mail.re4.yahoo.com>
On 01/07/2007 09:15 AM, Amit Choudhary wrote:
> Well, system calls today are not portable mainly because they are
> invoked using a number and it may happen that a number 'N' may refer
> to systemcall_1() on one system/kernel and to systemcall_2() on
> another system/kernel.
If we're limited to Linux kernels, this seems to not be the case. Great
care is taken in keeping this userspace ABI stable -- new system calls
are given new numbers. Old system calls may disappear (after a long
grace period) but even then I don't believe the number is ever recycled.
If your discussion is not limited to Linux kernels, then sure, but being
portable at that (sub-libc) level is asking too much.
> I hope that I made some sense.
Some, but your supposition seems unclear.
Rene
next prev parent reply other threads:[~2007-01-07 8:26 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-07 8:15 [DISCUSS] Making system calls more portable Amit Choudhary
2007-01-07 8:25 ` Rene Herman [this message]
2007-01-07 9:07 ` Amit Choudhary
2007-01-07 9:16 ` Rene Herman
2007-01-07 11:03 ` Jan Engelhardt
2007-01-07 13:59 ` Theodore Tso
2007-01-07 9:33 ` Vadim Lobanov
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