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[Tycho Andersen <tycho.andersen@xxxxxxxxxxxxx>]

Just to update, it looks like this is failing because booting a non-elf
multiboot image is not yet supported by kexec.

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https://bugs.launchpad.net/bugs/1297316

Title:
  kexec doesn't load multiboot images

Status in “kexec-tools” package in Ubuntu:
  New

Bug description:
  kexec explictly (in --help and man page) reports to support multiboot
  format images.  That doesn't work for at least some subset of
  seemingly proper multiboot images.  For some context, the goal
  essentially the same as discussed at [1].

  mbchk is from 'multiboot' package (built from source).

  Also note that 'qemu-system-x86_64' loads this multiboot image
  properly with 'qemu-system-x86_64 -kernel'

  $ dpkg-query --show kexec-tools
  kexec-tools     1:2.0.4-1ubuntu1

  $ mbchk /boot/grub/i386-pc/core.img
  /boot/grub/i386-pc/core.img: The Multiboot header is found at the offset 2416.
  /boot/grub/i386-pc/core.img: Page alignment is turned off.
  /boot/grub/i386-pc/core.img: Memory information is turned off.
  /boot/grub/i386-pc/core.img: Address fields is turned on.
  /boot/grub/i386-pc/core.img: All checks passed.

  $ kexec --debug --type multiboot-x86 /boot/grub/i386-pc/core.img
  kernel: 0x1767010 kernel_size: 6315
  MEMORY RANGES
  0000000000000100-000000000009f000 (0)
  000000000009f000-00000000000a0000 (1)
  00000000000e7000-0000000000100000 (1)
  0000000000100000-00000000bf760000 (0)
  00000000bf76e000-00000000bf770000 (1)
  00000000bf770000-00000000bf77e000 (2)
  00000000bf77e000-00000000bf7d0000 (3)
  00000000bf7d0000-00000000bf7e0000 (1)
  00000000bf7ec000-00000000c0000000 (1)
  00000000e0000000-00000000f0000000 (1)
  00000000fee00000-00000000fee01000 (1)
  00000000ffc00000-0000000100000000 (1)
  0000000100000000-0000000c40000000 (0)
  Cannot determine the file type of /boot/grub/i386-pc/core.img

  
  --
  [1] http://comments.gmane.org/gmane.linux.ubuntu.devel.discuss/14419

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: kexec-tools 1:2.0.4-1ubuntu1
  ProcVersionSignature: User Name 3.13.0-8.27-generic 3.13.2
  Uname: Linux 3.13.0-8-generic x86_64
  ApportVersion: 2.13.2-0ubuntu2
  Architecture: amd64
  Date: Tue Mar 25 14:00:01 2014
  ProcEnviron:
   TERM=screen
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: kexec-tools
  UpgradeStatus: No upgrade log present (probably fresh install)

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