RE: A bug about system call on ARM
From: Wang, Yalin
Date: Mon Jun 03 2013 - 05:58:30 EST
Oh I see,
Thanks for your reply
Yes , we are testing for it ,
But need some time to wait for the result ,
Because The stability test need some time to reproduce
this issue , And this issue doesn't reproduce 100% .
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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