linux-kernel - Re: X32 project status update

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Message-ID: <BANLkTikyg-SDtU9Z8KdCAeOkGR67ihVUkQ@mail.gmail.com>
Date:	Sat, 21 May 2011 09:27:05 -0700
From:	"H.J. Lu" <hjl.tools@...il.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	GCC Development <gcc@....gnu.org>,
	GNU C Library <libc-alpha@...rceware.org>,
	LKML <linux-kernel@...r.kernel.org>, x32-abi@...glegroups.com,
	"H. Peter Anvin" <h.peter.anvin@...el.com>
Subject: Re: X32 project status update

On Sat, May 21, 2011 at 8:34 AM, H.J. Lu <hjl.tools@...il.com> wrote:
> On Sat, May 21, 2011 at 8:27 AM, Arnd Bergmann <arnd@...db.de> wrote:
>> On Saturday 21 May 2011 17:01:33 H.J. Lu wrote:
>>> This is the x32 project status update:
>>>
>>> https://sites.google.com/site/x32abi/
>>>
>>
>> I've had another look at the kernel patch. It basically
>> looks all good, but the system call table appears to
>> diverge from the x86_64 list for no (documented) reason,
>> in the calls above 302. Is that intentional?
>>
>> I can see why you might want to keep the numbers identical,
>> but if they are already different, why not use the generic
>> system call table from asm-generic/unistd.h for the new
>> ABI?
>
> We can sort it out when we start merging x32 kernel changes.
>

Peter, is that possible to use the single syscall table for
both x86-64 and x32 system calls? Out of 300+ system
calls, only 84 are different for x86-64 and x32.  That
is additional 8*84 == 672 bytes in syscall table.


-- 
H.J.
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