From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <52E25A15.4080406@xenomai.org>
Date: Fri, 24 Jan 2014 13:18:29 +0100
From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
MIME-Version: 1.0
References: <52E1D646.8050907@steinkuehler.net> <52E24D0C.4050207@xenomai.org>
 <52E25099.9070107@steinkuehler.net>
In-Reply-To: <52E25099.9070107@steinkuehler.net>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Subject: Re: [Xenomai] ARM/BeagleBone Thumb2 Kernels
List-Id: Discussions about the Xenomai project <xenomai.xenomai.org>
List-Unsubscribe: <http://www.xenomai.org/mailman/options/xenomai>,
 <mailto:xenomai-request@xenomai.org?subject=unsubscribe>
List-Archive: <http://www.xenomai.org/pipermail/xenomai/>
List-Post: <mailto:xenomai@xenomai.org>
List-Help: <mailto:xenomai-request@xenomai.org?subject=help>
List-Subscribe: <http://www.xenomai.org/mailman/listinfo/xenomai>,
 <mailto:xenomai-request@xenomai.org?subject=subscribe>
To: Charles Steinkuehler <charles@steinkuehler.net>
Cc: xenomai@xenomai.org

On 01/24/2014 12:38 PM, Charles Steinkuehler wrote:
> As I understand it, the issue arises as the kernel grows larger and the
> distance between the branch and it's target increases.  My vmlinux for
> the (fixed Thumb2 version) BeagleBone kernel is currently weighing in at
> 13225004 bytes.
>
That is precisely the thing I do not understand: the jump goes from 
entry-armv.S to entry-common.S which should remain close since they 
follow each other on the link-edit command line. Since the source files 
are assembly, the distance should more or less be the same, whatever the 
compilation options. And if they are not close, this is where the bug 
is, because this assembly is used for every syscall and every interrupt.

-- 
					    Gilles.