A bug about system call on ARM

[Wang, Yalin]

Hi Will,

We have tested the patch,
It seems ok in the stability test .

We have merged it into our main branch .

Thanks for your patch !

-----Original Message-----
From: Will Deacon [mailto:will.deacon at arm.com] 
Sent: Monday, June 03, 2013 5:54 PM
To: Wang, Yalin
Cc: 'richard -rw- weinberger'; 'linux-arch at vger.kernel.org'; 'linux-kernel at vger.kernel.org'; 'linux-arm-kernel at lists.infradead.org'
Subject: Re: A bug about system call on ARM

On Mon, Jun 03, 2013 at 06:25:26AM +0100, Wang, Yalin wrote:
> Hi  Will,
> 
> I have a question about this patch .
> 
> If the user space is thumb mode,
> The PC should be rewind by 2 bytes,
> So the fix_up code should be
> 
> Sub lr, lr, #2 .
> 
> 
> Am I right ?

No, because we don't have OABI-compat support for Thumb applications and force everything down the EABI path instead.

Did you manage to test the patch?

Will