The making off of VNUML kernel linux-2.6.18.1-bb2-xt-4m (23/12/2007)
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Fermn Galn Mrquez (galan@dit.upm.es) (based on previous howto by David Fernndez)

Updated to 4m by David Fernandez (david@dit.upm.es) to include Jeff Dike patch to solve the pts problem.


Recipe:

  Download an untar vanilla kernel:

    # cd /usr/local/src
    # wget http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.18.1.tar.bz2
    # tar xfj linux-2.6.18.1.tar.bz2
    # cd linux-2.6.18.1

  Apply Jeff Dike patch to solve pts problem described in 
  http://www.mail-archive.com/user-mode-linux-user@lists.sourceforge.net/msg05559.html:

    # patch -p1 < ../linux-2.6.18.1-jdike-pts.patch

  Apply BlaisorBlade patch:

    # wget http://www.user-mode-linux.org/~blaisorblade/patches/guest/uml-2.6.18.1-bb2/uml-2.6.18.1-bb2.patch.bz2
    # bzcat uml-2.6.18.1-bb2.patch.bz2 | patch -p1

  Apply xterm patch:

    # patch -p1 < ../linux-2.6.18.1-xterm.patch

  Configure (based on the previous UML kernel):

    # /usr/share/vnuml/kernels/linux-2.6.18.1-bb2-xt-2m --showconfig > .config
    # make oldconfig ARCH=um (answering all with the default option)
    # vi .config (and set CONFIG_LOCALVERSION="-xt-4m")
#####above  part i am not sure about either i cant find the file. and i dont\ #have a previous install of uml
  Configure kernel options:

    # make menuconfig ARCH=um

  go to "Networking-->Networking options-->Network Packet filtering" and enable 
  all options under "IP: Netfilter Configuration" and "Core Netfilter Configuration".

  Apply the patch at http://readlist.com/lists/vger.kernel.org/linux-kernel/55/278741.html i
  (otherwise you probably get errors when compiling)

  Also compiling over OpenSuse 10.2, you could get an error related with function 
  offsetof. To solve it, just edit arch/um/sys-i386/user-offsets.c and 
  arch/um/sys-i386/ptrace_user.c and change:

    #include <linux/stddef.h>

  by:

    #include <stddef.h>

  More info in: http://www.webservertalk.com/message1709776.html

  Make the kernel:

    # make ARCH=um
    # strip linux
######################### when i  try make ARCH=um that is when i get the #########################errors in the other post
  Make the modules tar:

    # make modules_install ARCH=um
    # cd /lib/modules/
    # tar cfv modules-2.6.18.1-bb2-xt-4m.tar 2.6.18.1-bb2-xt-4m/
    # rm -rf /lib/modules/2.6.18.1-bb2-xt-4m (you don't need the modules in the host)

  Put the modules and the kernel where you want (for example, /usr/share/vnuml/kernels)

    # mv /lib/modules/modules-2.6.18.1-bb2-xt-4m.tar /usr/share/vnuml/kernels
    # cp /usr/local/src/linux-2.6.18.1/linux /usr/share/vnuml/kernels/linux-2.6.18.1-bb2-xt-4m
    # cp /usr/local/src/linux-2.6.18.1/.config /usr/share/vnuml/kernels/config-2.6.18.1-xt-4m