Unaligned problem when porting rtems for arm

Joel Sherrill joel.sherrill at OARcorp.com
Wed Apr 24 15:26:24 UTC 2013


On 4/24/2013 9:55 AM, Gedare Bloom wrote:
> Please use the 4.11 tools and git master for new development like this.
+1

If there is an issue with the tools and/or cpu model selection,
the gdb simulator is the easiest way to get a reproducible
test case that we can help you with. Otherwise, we are just doing
paper analysis.

--joel
> On Wed, Apr 24, 2013 at 10:05 AM, Peng Fan <van.freenix at gmail.com> wrote:
>> Version: arm-rtems4.10-gcc ---- gcc version 4.4.7 20120313
>>
>> is okay.
>>
>>
>> 2013/4/24 Peng Fan <van.freenix at gmail.com>
>>> Hi,
>>>
>>>
>>> 2013/4/24 Joel Sherrill <Joel.Sherrill at oarcorp.com>
>>>> The arm gdb bsp is intended to help find the correct options. They could
>>>> be wrong. When I did the bsp variants, I picked CPU variants that looked to
>>>> hit various multilibs.
>>>>
>>>> The arm had a lot of CPU models and it is easy to make a mistake. Is this
>>>> with the bsp for the simulator in gdb?
>>> I am porting RTEMS to a hardware board based on S3C6410, not for the
>>> simulator for gdb.
>>>>
>>>> --joel
>>>>
>>>> Gedare Bloom <gedare at rtems.org> wrote:
>>>>
>>>>
>>>> Given the newness of this port, I would guess the options are wrong.
>>>>
>>>> On Wed, Apr 24, 2013 at 9:19 AM, Sebastian Huber
>>>> <sebastian.huber at embedded-brains.de> wrote:
>>>>> Hello,
>>>>>
>>>>> in case GCC uses a half-word load or store where it shouldn't, then you
>>>>> have
>>>>>
>>>>> 1. wrong compiler options, or
>>>>> 2. a compiler bug.
>>>>>
>>>>> --
>>>>> Sebastian Huber, embedded brains GmbH
>>>>>
>>>>> Address : Dornierstr. 4, D-82178 Puchheim, Germany
>>>>> Phone   : +49 89 189 47 41-16
>>>>> Fax     : +49 89 189 47 41-09
>>>>> E-Mail  : sebastian.huber at embedded-brains.de
>>>>> PGP     : Public key available on request.
>>>>>
>>>>> Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
>>>>> _______________________________________________
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>>>


-- 
Joel Sherrill, Ph.D.             Director of Research & Development
joel.sherrill at OARcorp.com        On-Line Applications Research
Ask me about RTEMS: a free RTOS  Huntsville AL 35805
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