Differenze tra le versioni 1 e 3 (in 2 versioni)

Notes on OpenWRT UML + Netkit

The goal of this guide is to use Netkit with OpenWRT hosts in the emulated environment.

http://wiki.netkit.org/index.php/Main_Page

UML binaries are built with the host toolchain and are meant to run on the host they were built on.

We used a Gentoo machine amd64 profile (64bit processor)

Create OpenWRT UML images

Download and compile OpenWRT for the UML target (tested at 9/12/2009 revision 18717)

svn co svn://svn.openwrt.org/openwrt/trunk/
cd trunk
make menuconfig

select the UML target and compile

we are using the following CHOST x86_64-pc-linux-gnu-4.3.4

we had a problem with some script looking for a lib64 dir that was not existing, solved like this:

cd $trunk_dir$/staging_dir/toolchain-x86_64_gcc-4.1.2_uClibc-0.9.30.1/
ln -s lib lib64

if the firmware compiles you have the binaries in $trunk_dir$/bin/uml

Test the UML binary

To test if your UML binary boots just use the guide from zoobab http://www.zoobab.com/openwrt-and-user-mode-linux

Integrate in Netkit

Launch in Netkit like this:

cd bin/uml
vstart openwrt --eth0=0 --con0=xterm --con1=xterm --verbose -m openwrt-uml-ext2.img -k ./openwrt-uml-vmlinux

You will have a OpenWRT machine launched within Netkit, but only the second terminal is properly working for now, adjust inittab (see later)

Remount Read Write

To remount the filesystem readwrite

mount --remount -o rw /dev/root /

Adjust inittab

Original /etc/inittab in OpenWRT looks like this:

root@OpenWrt:/# cat /etc/init
/etc/init.d/  /etc/inittab
root@OpenWrt:/# cat /etc/inittab 
::sysinit:/etc/init.d/rcS S boot
::shutdown:/etc/init.d/rcS K stop
tts/0::askfirst:/bin/ash --login
tty1::askfirst:/bin/ash --login
root@OpenWrt:/#

modify like this:

root@OpenWrt:/# cat /etc/inittab 
::sysinit:/etc/init.d/rcS S boot
::shutdown:/etc/init.d/rcS K stop
tty0::askfirst:/bin/ash --login
tty1::askfirst:/bin/ash --login
root@OpenWrt:/#

-  ⇤ ← Versione 1 del 2009-12-09 18:04:35 → 
  Dimensione: 1486
  Autore: ZioPRoTo
  Commento:
+   ← Versione 3 del 2009-12-10 00:39:07 → ⇥
  Dimensione: 2084
  Autore: ZioPRoTo
  Commento:
-Le cancellazioni sono segnalate in questo modo.
+Le aggiunte sono segnalate in questo modo.
 Linea 4:
+http://wiki.netkit.org/index.php/Main_Page
-Linea 48:
+Linea 50:
-== Adjust inittab ==


== Notes ==
+=== Remount Read Write ===
-Linea 57:
+Linea 56:
+=== Adjust inittab ===

Original {{{/etc/inittab}}} in OpenWRT looks like this:

{{{
root@OpenWrt:/# cat /etc/init
/etc/init.d/  /etc/inittab
root@OpenWrt:/# cat /etc/inittab 
::sysinit:/etc/init.d/rcS S boot
::shutdown:/etc/init.d/rcS K stop
tts/0::askfirst:/bin/ash --login
tty1::askfirst:/bin/ash --login
root@OpenWrt:/# 
}}}

modify like this:
{{{
root@OpenWrt:/# cat /etc/inittab 
::sysinit:/etc/init.d/rcS S boot
::shutdown:/etc/init.d/rcS K stop
tty0::askfirst:/bin/ash --login
tty1::askfirst:/bin/ash --login
root@OpenWrt:/#
}}}