target/linux/uml/README - T108 - Gitiles

 OpenWrt inside a user mode linux.  Why would we even want this many ask?

 There are potentially a lot of reasons, one obvious one to me, it allows
 folks to 'kick the tires' without actually flashing up any hardware.  It's
 also a great environment for porting over packages, you can get a package
 fully functional in the uclibc root environment inside a uml without actually
 disturbing your 'real router', and then rebuild for a specific target once
 it's fully tested.

 This is a first stab at a build that 'just works' and there will be more
 cleanup to come.  The simple directions are:-

 Configure for uml target
 Configure with an ext4 root file system
 build it all

 In your bin directory you will find a kernel and an ext4 root file system
 when it's finished.  Just run it like this:-

 bin/targets/uml/generic/lede-uml-vmlinux
 ubd0=bin/targets/uml/generic/openwrt-uml-ext4.img

 The uml will start, and eventually the serial console of the uml will be at your
 console prompt.  If you would like it in xterms, substitute con=xterm and con0=xterm.
 No networking is configured, but, it's a starting point.  The resulting file system
 has just enough free space to start kicking the tires and playing in the world of
 'embedded routers' along with all the resource restrictions that come with that
 world.

 To configure networking and more, refer to the user mode linux documentation online.
 A quick start goes along this line.  install the uml-utilities packages so you have
 the uml switch in and running, then add a command param to your uml start like this

 eth0=daemon,00:01:01:01:01:01,unix,/<your uml switch control socket here>

 With that in, and uml networking actually functional (can be a challenge at times),
 you should be able to ifconfig the interface and talk to the host side, or, if you
 bridged the uml switch to your host network, you should be able to run udhcp and be
 away with networking off to the world.  Again, if you are unfamiliar with uml and
 uml networking, please read the docs and how-to stuff available on the net.  It does
 take some fiddling to get it started and working right the first time, but after that,
 it opens up a whole new world of virtual machines.


 http://user-mode-linux.sourceforge.net/
	OpenWrt inside a user mode linux. Why would we even want this many ask?

	There are potentially a lot of reasons, one obvious one to me, it allows
	folks to 'kick the tires' without actually flashing up any hardware. It's
	also a great environment for porting over packages, you can get a package
	fully functional in the uclibc root environment inside a uml without actually
	disturbing your 'real router', and then rebuild for a specific target once
	it's fully tested.

	This is a first stab at a build that 'just works' and there will be more
	cleanup to come. The simple directions are:-

	Configure for uml target
	Configure with an ext4 root file system
	build it all

	In your bin directory you will find a kernel and an ext4 root file system
	when it's finished. Just run it like this:-

	bin/targets/uml/generic/lede-uml-vmlinux
	ubd0=bin/targets/uml/generic/openwrt-uml-ext4.img

	The uml will start, and eventually the serial console of the uml will be at your
	console prompt. If you would like it in xterms, substitute con=xterm and con0=xterm.
	No networking is configured, but, it's a starting point. The resulting file system
	has just enough free space to start kicking the tires and playing in the world of
	'embedded routers' along with all the resource restrictions that come with that
	world.

	To configure networking and more, refer to the user mode linux documentation online.
	A quick start goes along this line. install the uml-utilities packages so you have
	the uml switch in and running, then add a command param to your uml start like this

	eth0=daemon,00:01:01:01:01:01,unix,/<your uml switch control socket here>

	With that in, and uml networking actually functional (can be a challenge at times),
	you should be able to ifconfig the interface and talk to the host side, or, if you
	bridged the uml switch to your host network, you should be able to run udhcp and be
	away with networking off to the world. Again, if you are unfamiliar with uml and
	uml networking, please read the docs and how-to stuff available on the net. It does
	take some fiddling to get it started and working right the first time, but after that,
	it opens up a whole new world of virtual machines.



	http://user-mode-linux.sourceforge.net/