RE: A bug about system call on ARM

From: Wang, Yalin
Date: Fri Jun 14 2013 - 02:53:24 EST

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@xxxxxxx]
Sent: Monday, June 03, 2013 5:54 PM
To: Wang, Yalin
Cc: 'richard -rw- weinberger'; 'linux-arch@xxxxxxxxxxxxxxx'; 'linux-kernel@xxxxxxxxxxxxxxx'; 'linux-arm-kernel@xxxxxxxxxxxxxxxxxxx'
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?

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