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From: Cedric Le Goater <clg@fr.ibm.com>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: sukadev@us.ibm.com, Andrew Morton <akpm@osdl.org>,
	serue@us.ibm.com, "David C. Hansen" <haveblue@us.ibm.com>,
	Pavel Emelyanov <xemul@openvz.org>,
	Containers <containers@lists.osdl.org>,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/3] clone64() and unshare64() system calls
Date: Thu, 10 Apr 2008 14:33:10 +0200	[thread overview]
Message-ID: <47FE0906.8080102@fr.ibm.com> (raw)
In-Reply-To: <47FD6921.6090408@zytor.com>

H. Peter Anvin wrote:
> sukadev@us.ibm.com wrote:
>>>
>>> If you're going to make it a 64-bit pass it in as a 64-bit number,
>>> instead of breaking it into two numbers.
>>
>> Maybe I am missing your point. The glibc interface could take a 64bit
>> parameter, but don't we need to pass 32-bit values into the system
>> call on 32 bit systems ?
> 
> Not as such, no.  The ABI handles that.  To make the ABI clean on some
> architectures, it's good to consider a 64-bit value only in positions
> where they map to an even:odd register pair once slotted in.

OK. I didn't know that. I took sys_llseek() as an example of an interface 
to follow when coded clone64(). 

Thanks,

C. 

  parent reply	other threads:[~2008-04-10 12:33 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-04-09 22:26 [PATCH 0/3] clone64() and unshare64() system calls sukadev
2008-04-09 22:32 ` [PATCH 1/3] change clone_flags type to u64 sukadev
2008-04-10  8:25   ` Andi Kleen
2008-04-10 12:25     ` Cedric Le Goater
2008-04-10 12:52       ` Andi Kleen
2008-04-10 13:11         ` Kirill Korotaev
2008-04-10 13:23           ` Cedric Le Goater
2008-04-10 13:18         ` Cedric Le Goater
2008-04-10 17:14         ` Serge E. Hallyn
2008-04-10 22:13           ` Daniel Hokka Zakrisson
2008-04-10 22:49             ` Serge E. Hallyn
2008-04-11  8:45               ` Daniel Hokka Zakrisson
2008-04-09 22:34 ` [PATCH 2/3] add do_unshare() sukadev
2008-04-09 22:34 ` [PATCH 3/3] add the clone64() and unshare64() syscalls sukadev
2008-04-09 23:07   ` Jakub Jelinek
2008-04-10  2:15     ` sukadev
2008-04-10  3:40       ` H. Peter Anvin
2008-04-10  0:00 ` [PATCH 0/3] clone64() and unshare64() system calls H. Peter Anvin
2008-04-10  1:07   ` sukadev
2008-04-10  1:10     ` H. Peter Anvin
2008-04-10  2:38       ` sukadev
2008-04-10  2:43         ` Paul Menage
2008-04-10 18:26           ` sukadev
2008-04-10 18:31             ` H. Peter Anvin
2008-04-10 12:33       ` Cedric Le Goater [this message]
2008-04-10 16:00         ` H. Peter Anvin
2008-04-10  6:48   ` Cedric Le Goater

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