linux-kernel - Re: RFD: x32 ABI system call numbers

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Message-ID: <20110827044050.GA3549@infradead.org>
Date:	Sat, 27 Aug 2011 00:40:50 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"H.J. Lu" <hjl.tools@...il.com>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: RFD: x32 ABI system call numbers

On Fri, Aug 26, 2011 at 05:57:34PM -0700, H. Peter Anvin wrote:
> On 08/26/2011 05:36 PM, Linus Torvalds wrote:
> > If you want to be compatible with "int 0x80" and old libraries, then I
> > really don't see why you would introduce *anything* new.
> 
> Just to be clear, the reason to keep the LFS stuff in there was to be
> compatible with the existing 32-bit *programming model*, so that a
> program recompiled from i386 to x32 should behave the same.
> 
> Not that anyone should compile without -D_FILE_OFFSET_BITS=64 these days...

Any new port should not even offer non-LFS system calls.  They are a
pain in the but, and I would sacrifice chicken if we coud stop glibc
offering it as a default that way.

> 
> 	-hpa
> 
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