From: Jerome de Vivie <jerome.devivie@free.fr>
To: Rik van Riel <riel@conectiva.com.br>
Cc: linux-kernel@vger.kernel.org
Subject: Re: mmap inside kernel memory.
Date: Sun, 09 Feb 2003 02:50:55 +0100 [thread overview]
Message-ID: <3E45B3FF.E687EF48@free.fr> (raw)
In-Reply-To: Pine.LNX.4.50L.0302082159460.12742-100000@imladris.surriel.com
Rik van Riel wrote:
>
> On Sun, 9 Feb 2003, Jerome de Vivie wrote:
>
> > "mmap" seems to be design for mapping file or device inside a process
> > memory. Is it possible to map a file into the kernel virtual memory ?
>
> In theory yes (using vmalloc space), but you really don't want to.
Yes, it's very tricky ! I have (naïvly) try this:
vaddr=vmalloc(len);
do_mmap(file ,kvaddr ,len ,PROT_READ|PROT_WRITE ,MAP_FIXED|MAP_PRIVATE
,0);
Here, do_mmap check if the addresse match inside current process and
return me -ENOMEM. Are there others functions which i could use to
associate this file and a vmalloc'ed space ?
j.
--
Jérôme de Vivie
next prev parent reply other threads:[~2003-02-09 0:34 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-02-09 0:58 mmap inside kernel memory Jerome de Vivie
2003-02-09 0:00 ` Rik van Riel
2003-02-09 1:50 ` Jerome de Vivie [this message]
2003-02-09 1:51 ` Rik van Riel
2003-02-09 13:43 ` Jerome de Vivie
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