From: Wolfgang Denk <wd@denx.de>
To: Stuart Hodgson <stuart@quadrics.com>
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: Semaphores in eldk4.1
Date: Fri, 30 Nov 2007 23:27:26 +0100 [thread overview]
Message-ID: <20071130222726.1E0DB247C1@gemini.denx.de> (raw)
In-Reply-To: Your message of "Fri, 30 Nov 2007 16:33:30 GMT." <47503B5A.6090604@quadrics.com>
In message <47503B5A.6090604@quadrics.com> you wrote:
>
> I have been suing the eldk4.1 tool chain for a few months now and have
Please post ELDK related questions on the ELDK mailing list instead,
see http://lists.denx.de/mailman/listinfo/eldk
> The problem I have come up against is related to some of the semaphore
> functions in semaphore.h, namely sem_wait, sem_post. This was originally
> noticed in a third party driver I am porting from one board to another
--------------------------^^^^^^^^
> but a small test program has shown the same results.
What exactly are you talking about? Device driver (i. e. kernel)
code, or application (i. e. user space) code ?
> Calls to these functions on the ppc_82xx platform return -1 with an
> error code of 38, in this case meaning ENOSYS (not implemented). On the
Did you enable the CONFIG_SYSVIPC option in your Linux kernel
configuration?
> ppc_85xx the same program executes fine, thus I conclude that it is
> specific to the libc-2.3.5 for ppc_82xx. Has anyone else come across
> this problem, I did find one thread but there was no conclusion listed.
There is absolutley no difference between ppc_85xx and ppc_82xx as
far as library sources or configuration are concerned. The problem is
most probably in your Linux kernel, I guess.
> I also can not find anything stating that these functions are not
> implemented for the 82xx arch compared with others for the eldk4.1
Provide a test program that fails for yuou, and we can provide much
better comments.
But please post followups on the ELDK mailing list.
Best regards,
Wolfgang Denk
--
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de
Old programmers never die, they just become managers.
prev parent reply other threads:[~2007-11-30 22:27 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-30 16:33 Semaphores in eldk4.1 Stuart Hodgson
2007-11-30 18:10 ` Ben Warren
2007-11-30 22:27 ` Wolfgang Denk [this message]
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