An l4re system is started through QEMU by using (for example)
something like:

qemu-system-x86_64 -nographic -kernel bootstrap \
                -append bootstrap \
                -initrd "fiasco -serial_esc,sigma0,moe --init=rom/posix_test,l4re,posix_test"

Notice that:
- The "bootstrap" executable is used as a kernel
- The real ukernel (fiasco) and the servers are loaded
  as modules
  - Remember? A module is some kind of "binary blob"
    loaded by the bootloader (integrated in qemu, in
    this case) without parsing it

The "bootstrap" executable will read all the modules from
memory, parse them (as ELF executables) and relocate them
in memory, so the they can be executed.

The ukernel "fiasco" is then started by bootstrap and finds
two important servers ("sigma0" and "moe") already loaded
in memory.

The "moe" server is then in charge of loading the additional
servers ("l4re") and programs ("posix_test") from a
pseudo-filesystem located somewhere in memory.