FreeBSD relocator crash

[Colin Watson]

While working on Debian bug #612128 in a KVM instance, I found that any
call to kfreebsd_module_elf seems to crash GRUB (1.99~rc1).  I
reproduced this with both FreeBSD 7.2 + acpi.ko and FreeBSD 8.1 +
ufs.ko.  This sequence of commands:

  kfreebsd /boot/kfreebsd-8.1-1-686.gz
  set debug=all
  kfreebsd_module_elf /lib/modules/8.1-1-686/ufs.ko

... results in this sequence of debug messages just before hanging:

  kern/disk.c:245: Opening `hd0,msdos1'...
  partmap/msdos.c:140: partition 0: flag 0x80, type 0xa5, start 0x3f, len 
0x13fff71
  kern/fs.c:54: Detecting ufs2...
  lib/relocator.c:1211: min_addr = 0xec6fec, max_addr = 0xffffffff, target = 
0xec7000
  lib/relocator.c:424: trying to allocate in 0xec7000-0xffffffff aligned 0x1 
size 0x43ab8

Does anyone know what's wrong here, or my best strategy for gathering
more information if it isn't obvious?

Thanks,

-- 
Colin Watson                                       address@hidden