X-Recipient: archive-cygwin AT delorie DOT com
DomainKey-Signature: a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:to:from:subject:date:message-id:references
	:mime-version:content-type:content-transfer-encoding; q=dns; s=
	default; b=U5JbuhhC9qJRFPi32NsuesMDprrYDJBjGSD/yAwOoc/XPIEsbUEhQ
	g1EjH7YtNZ0BAwGATvikwoLGS5orDMwQn2lWLwsGuRzc8pleTJQuIcqAYEVd8fSf
	opPBtfXie/a8kHEPA5KvJpSPes3swBs6hudIKm0gS1ed4eEt3baROc=
DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:to:from:subject:date:message-id:references
	:mime-version:content-type:content-transfer-encoding; s=default;
	 bh=1a8KBHwJtyIS0dHhRPWTIdYrc5k=; b=iUzwxEfUE8beQA8x8PXlS+K4X+57
	sMxdRswkZcptq+pIbywI2XMbRTr2RmfblfQc0XG0ORaw/MgLE8PEdX6ZZm3COxIm
	HjRw+O/IaPhUaVr6ryu03DcRWUVlsEUNd1bvPBvYk/tkSMCqmazNfTnltYjzMlsZ
	Q6TsY/cyVJZxCFs=
Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Id: <cygwin.cygwin.com>
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sourceware.org/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com
Authentication-Results: sourceware.org; auth=none
X-Virus-Found: No
X-Spam-SWARE-Status: No, score=-1.3 required=5.0 tests=AWL,BAYES_40,RCVD_IN_DNSWL_LOW,SPF_HELO_PASS,SPF_PASS,T_RP_MATCHES_RCVD autolearn=ham version=3.3.2
X-HELO: plane.gmane.org
To: cygwin AT cygwin DOT com
From: Mark Geisert <mark AT maxrnd DOT com>
Subject: Re: File operations on a Windows Driver (character device)
Date: Tue, 19 May 2015 07:52:39 +0000 (UTC)
Lines: 18
Message-ID: <loom.20150519T094146-560@post.gmane.org>
References: <CACs=mWDRGh9KZBT45=8yy4J6h62v0RNYxczV91qRhhb8LcfY4Q AT mail DOT gmail DOT com>	<5559FB9E DOT 3040200 AT cygwin DOT com> <CACs=mWCO8ejvsufP3C_HFAiKDrcsanGZ+J_EuQQGOm+u30T_zg AT mail DOT gmail DOT com>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
User-Agent: Loom/3.14 (http://gmane.org/)
X-IsSubscribed: yes

Alessio Faina writes:
> Ok thanks, I've been able to find the character device under
> "/proc/sys/DosDevices/Global/deviceName"; now I'm stuck with the mmap
> implementation; when I do mmap in the userland program it returns me
> errno 19 (#define ENODEV      19  /* No such device */) obviously because
> I haven't set anything in the kernel module; there's a way to make visible a
> portion of memory to be used by the mmap in the kernel? The memory is Non
Paged
> and allocated with a ExAllocatePoolWithTag in 'win terms'.

Does
http://stackoverflow.com/questions/29938573/accessing-kernel-memory-from-user-mode-windows
help to answer your question?  If it does, you'll still have to decide
whether to translate the Windows calls there into Cygwin calls or instead
just localize the Windows calls in one user-level module and leave
everything else to Cygwin.

..mark


--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple