From owner-freebsd-hackers  Mon Apr 22 15:34:34 2002
Delivered-To: freebsd-hackers@freebsd.org
Received: from mailhub.yumyumyum.org (dsl092-171-091.wdc1.dsl.speakeasy.net [66.92.171.91])
	by hub.freebsd.org (Postfix) with SMTP id A52D037C065
	for <freebsd-hackers@freebsd.org>; Mon, 22 Apr 2002 15:23:56 -0700 (PDT)
Received: (qmail 21100 invoked from network); 22 Apr 2002 13:23:05 -0000
Received: from ken.yumyumyum.org (192.168.0.2)
  by router.yumyumyum.org with SMTP; 22 Apr 2002 13:23:05 -0000
Content-Type: text/plain;
  charset="iso-8859-1"
From: Kenneth Culver <culverk@yumyumyum.org>
To: Terry Lambert <tlambert2@mindspring.com>
Subject: Re: implementing linux mmap2 syscall
Date: Mon, 22 Apr 2002 09:23:35 -0400
X-Mailer: KMail [version 1.4]
References: <200204211525.08827.culverk@yumyumyum.org> <3CC3E619.8AD5EFF9@mindspring.com>
In-Reply-To: <3CC3E619.8AD5EFF9@mindspring.com>
Cc: freebsd-hackers@freebsd.org, freebsd-emulation@freebsd.org
MIME-Version: 1.0
Content-Transfer-Encoding: quoted-printable
Message-Id: <200204220923.35667.culverk@yumyumyum.org>
Sender: owner-freebsd-hackers@FreeBSD.ORG
Precedence: bulk
List-ID: <freebsd-hackers.FreeBSD.ORG>
List-Archive: <http://docs.freebsd.org/mail/> (Web Archive)
List-Help: <mailto:majordomo@FreeBSD.ORG?subject=help> (List Instructions)
List-Subscribe: <mailto:majordomo@FreeBSD.ORG?subject=subscribe%20freebsd-hackers>
List-Unsubscribe: <mailto:majordomo@FreeBSD.ORG?subject=unsubscribe%20freebsd-hackers>
X-Loop: FreeBSD.ORG

On Monday 22 April 2002 06:29 am, you wrote:
> Kenneth Culver wrote:
> > So what it looks like to me is that mmap2 expects an offset that's
> > already page-aligned (I'm not sure if this is the right way to say it=
),
> > where mmap doesn't. the FreeBSD code in the linuxulator basically jus=
t
> > takes the offset that is passed in with the linux mmap, and uses that=
 to
> > call FreeBSD's mmap (the kernel version, not the one called from
> > userland). So basically I'm kinda stuck as to what to do to implement
> > linux's mmap2. The only thing I can think of is to implement a FreeBS=
D
> > "mmap2" that basically assumes that the offset passed in is already p=
age
> > aligned or whatever, and just uses it, and then have linux_mmap2() ju=
st
> > call the FreeBSD mmap2(). Any ideas?
>
> This is too much work.
>
> Basically, it just wants to bitch when the offset is not page
> aligned, and then call the old mmap if it doesn't bitch.
>
OK, I think I can do that, thanks for the help. Will anyone be interested=
 in=20
patches when/if I get this working? I also implemented ftruncate64 (which=
=20
just calls ftruncate).=20

Ken

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-hackers" in the body of the message