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Date: Sat, 31 Jan 2004 11:41:33 -0800
From: "H. Peter Anvin" <hpa@zytor.com>
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To: Arnd Bergmann <arnd@arndb.de>
CC: Paul Mackerras <paulus@samba.org>, klibc list <klibc@zytor.com>,
       linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [klibc] Re: long long on 32-bit machines
References: <4017F991.2090604@zytor.com> <16408.59474.427408.682002@cargo.ozlabs.ibm.com> <401B464C.50004@zytor.com> <200401311323.40399.arnd@arndb.de>
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Arnd Bergmann wrote:
> On Saturday 31 January 2004 07:08, H. Peter Anvin wrote:
> 
>>Does system calls follow the same convention?
> 
> 
> I have just looked up in glibc what architectures need this kind
> of handling and found that there is no easy rule. The good news
> is that none of (hppa m68k s390 sparc x86_64 alpha cris i386 sparc64 
> arm ia64) are doing this. 
> 
> AFAICS, the padding is done for exactly these system calls:
> 
> ppc: truncate64, ftruncate64, pread64, pwrite64
> mips: truncate64, ftruncate64, pread64, pwrite64
> sh: pread64, pwrite64
> 
> fadvise64_64 is another story: 
> mips does no padding, ppc32 reorders the arguments (int fd, int advise,
> off64_t offset, off64_t len) and s390 passes a struct, for the
> reason Uli already explained.
> 

<BARF>

I hate ad hockery :(  Yet more evidence for the need of a formal 
description of the ABI in the kernel.

	-hpa
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