[uml-devel] MacOS X port?

[uml-devel] MacOS X port?

[Wesley W. Terpstra]

Hi, I know that user-mode-linux has been ported to linux/ppc already.
What I was wondering is if there was work underway to port it to MacOS X?
That is to say, running a linux kernel from the BSD-ish MacOS X userland.

This would be really cool; it would mean MacOS X users could run linux
applications 'natively' under UML with X forwarding to MacOS X's X server. 
I couldn't imagine a more ideal configuration. :-)

How hard would such an undertaking be?

PS. I am not subscribed to this list; please CC me.

-- 
Wesley W. Terpstra


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Re: [uml-devel] MacOS X port?

[Jeff Dike]

On Mon, Apr 18, 2005 at 01:31:14PM +0200, Wesley W. Terpstra wrote:
> Hi, I know that user-mode-linux has been ported to linux/ppc already.
> What I was wondering is if there was work underway to port it to MacOS X?
> That is to say, running a linux kernel from the BSD-ish MacOS X userland.
> 
> This would be really cool; it would mean MacOS X users could run linux
> applications 'natively' under UML with X forwarding to MacOS X's X server. 
> I couldn't imagine a more ideal configuration. :-)
> 
> How hard would such an undertaking be?

That's an OS port, which is very different from an arch port.  There is work
underway (see the os abstraction patches at 
http://user-mode-linux.sf.net/patches.html) to make UML OS-portable.

arch/um/include/os.h will show you what you currently have to implement for
a new OS.  This is subject to change since we have only moved the existing
OS-specific stuff and not tried to rationalize it yet.

				Jeff


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Re: [uml-devel] MacOS X port?

[Blaisorblade]

On Monday 18 April 2005 16:05, Jeff Dike wrote:
> On Mon, Apr 18, 2005 at 01:31:14PM +0200, Wesley W. Terpstra wrote:
> > Hi, I know that user-mode-linux has been ported to linux/ppc already.
> > What I was wondering is if there was work underway to port it to MacOS X?
> > That is to say, running a linux kernel from the BSD-ish MacOS X userland.
> >
> > This would be really cool; it would mean MacOS X users could run linux
> > applications 'natively' under UML with X forwarding to MacOS X's X
> > server. I couldn't imagine a more ideal configuration. :-)
> >
> > How hard would such an undertaking be?
>
> That's an OS port, which is very different from an arch port.  There is
> work underway (see the os abstraction patches at
> http://user-mode-linux.sf.net/patches.html) to make UML OS-portable.
>
> arch/um/include/os.h will show you what you currently have to implement for
> a new OS.  This is subject to change since we have only moved the existing
> OS-specific stuff and not tried to rationalize it yet.
>
> 				Jeff
Currently (i.e. in committed code, not counting the changes mentioned above), 
os.h abstracts away mostly some file access and process handling functions.

That said, to do such a port there is the need for a Mac OS X developer... 
since Mac OS X is still Unix that should not be too hard, but I don't know.

For instance, does ptrace() exists (check via "man ptrace")? I think that 
incapsulating this call is not a work in progress, and it won't be until we 
don't have at least another API to port UML to.

Also, I heard rumors of a FreeBSD port (although I don't remember if it was 
just a request); since the FreeBSD roots of MacOSX, a lot of code could 
probably be shared by those ports.
-- 
Paolo Giarrusso, aka Blaisorblade
Linux registered user n. 292729
http://www.user-mode-linux.org/~blaisorblade





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