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Date:      Tue, 6 Dec 2011 13:45:54 +0000
From:      RW <rwmaillists@googlemail.com>
To:        ports@freebsd.org
Subject:   Re: Linux compatibility with more than one Linux installed?
Message-ID:  <20111206134554.44298ce7@gumby.homeunix.com>
In-Reply-To: <CAGsORuDWFDvrcbjN0wREsb%2B%2BmRMZKbcjgCGGDgT2Tr8svMD9Wg@mail.gmail.com>
References:  <eer12xrotnbwco8ti8cfbwy3.1323091614336@email.android.com> <20111206095325.66342106566C@hub.freebsd.org> <CAGsORuAa2-b2xrwttEfwei9VJB4GonKM_Evn4RxopGO=i%2BiryA@mail.gmail.com> <20111206122146.3002664c@gumby.homeunix.com> <CAGsORuDWFDvrcbjN0wREsb%2B%2BmRMZKbcjgCGGDgT2Tr8svMD9Wg@mail.gmail.com>

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On Tue, 6 Dec 2011 06:29:03 -0600
Zhihao Yuan wrote:

> On Tue, Dec 6, 2011 at 6:21 AM, RW <rwmaillists@googlemail.com> wrote:
> > On Tue, 6 Dec 2011 04:54:18 -0600
> > Zhihao Yuan wrote:
> >
> >
> >> Not really. The actual thing is, linuxulator is a Linux kernel
> >> running as a FreeBSD kernel module. The only thing FreeBSD kernel
> >> do is to identify the Linux program and to pass it to the Linux
> >> kernel. To the Linux programs inside a GNU chroot enviroment, they
> >> think they are running inside a Linux box and actually they are
> >> running inside a Linux box.
> >
> > Are you sure about that? I was under the impression that it was a
> > fairly thin emulation layer on top of the FreeBSD kernel. Has
> > something changed?
> 
> To Linux program, there is no "emulation layer". This technology
> should be called "extended ELF lookup table", and has nothing to do
> with emulation.

It's not emulation in the narrow sense that vmware is emulation and
wine isn't, but it certainly is emulation within the normal sense or the
word. My dictionary defines emulate as "imitate zealously".

But what I was getting at was the statement "linuxulator is a Linux
kernel running as a FreeBSD kernel module" which I'm guessing now you
didn't mean literally.



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