From: Dan Kegel <dank@kegel.com>
To: Todd <to_dd@yahoo.com>
Cc: linuxppc-embedded@lists.linuxppc.org
Subject: Re: exernalizing module functions to user space
Date: Fri, 19 Sep 2003 20:38:14 -0700 [thread overview]
Message-ID: <3F6BCBA6.3000405@kegel.com> (raw)
In-Reply-To: <20030919192939.31485.qmail@web40412.mail.yahoo.com>
Todd wrote:
> I would like to make certain functions in my driver
> available to user space applications. At first it
> seemed that EXTERN_SYMBOL was the solution, but this
> appears to externalize the functions only to other
> modules.
> I considered adding specialized entries in the
> file_operations structure...but this does not seem
> appropriate. Can anyone explain the proper method of
> acheiving this??
Yes. This is an extremely basic question, you may wish
to grab a book or two on linux kernel programming.
The kernel is in a different address space than user code,
so you can't use direct calls.
Write a syscall, an ioctl, a driver, or create /proc entries.
- Dan
--
Dan Kegel
http://www.kegel.com
http://counter.li.org/cgi-bin/runscript/display-person.cgi?user=78045
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
prev parent reply other threads:[~2003-09-20 3:38 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-09-19 19:29 exernalizing module functions to user space Todd
2003-09-20 3:38 ` Dan Kegel [this message]
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