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I am not quite sure what that would achieve.
We have come to the conclusion that with CONFIG_HAVE_AOUT=y and CONFIG_BINFMT_AOUT=m the latest Ubuntu version successfully handles QMAGIC a.out executables. Also, that all OMAGIC and ZMAGIC files segfault after executing 0 instructions.
It is impossible for a coredump (in case there is one) to contain anything useful. I suspect a kernel bug where the memory mapping setup is faulty.

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https://bugs.launchpad.net/bugs/966472

Title:
  missing a.out (ZMAGIC) support

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  In order to run old (1994) commercial binaries, one needs a.out (ZMAGIC) support.
  Executables that used to work (a few years ago) now give "cannot execute binary file".
  strace on the invocation shows "ENOEXEC (Exec format error)".
  Inspection of /boot/config-2.6.32-22-generic shows 
  # CONFIG_HAVE_AOUT is not set
  # CONFIG_IA32_AOUT is not set
  Inspection of /lib/modules/2.6.32-22-generic shows no ia32_aout.ko, where I think there used to be such a module.

  So, perhaps the absence of such a module contributes to the non-running of my old executable.
  Recently, perhaps in 2.6.27-11-generic there still was such a module.
  All this is on x86_64 with Ubuntu 10.04.4 LTS. It looks like Ubuntu 11.10 does not have AOUT support either.

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