[Crash-utility] crash-utility for inspecting FreeBSD VM dump

[Miao Jincheng]

Hi everyone,

I am curious for inspecting FreeBSD VM dump by crash-utility.

I built crash from source, and changed the configure option of gdb to target FreeBSD.
And used virsh dump --memory-only to generate freebsd.dump.
But I got an obstacle when use this crash utility to load FreeBSD dump:
# ./crash/crash ./kernel.debug ./freebsd.dump

crash 7.1.4
Copyright (C) 2002-2015  Red Hat, Inc.
Copyright (C) 2004, 2005, 2006, 2010  IBM Corporation
Copyright (C) 1999-2006  Hewlett-Packard Co
Copyright (C) 2005, 2006, 2011, 2012  Fujitsu Limited
Copyright (C) 2006, 2007  VA Linux Systems Japan K.K.
Copyright (C) 2005, 2011  NEC Corporation
Copyright (C) 1999, 2002, 2007  Silicon Graphics, Inc.
Copyright (C) 1999, 2000, 2001, 2002  Mission Critical Linux, Inc.
This program is free software, covered by the GNU General Public License,
and you are welcome to change it and/or distribute copies of it under
certain conditions.  Enter "help copying" to see the conditions.
This program has absolutely no warranty.  Enter "help warranty" for details.

GNU gdb (GDB) 7.6
Copyright (C) 2013 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "--host=x86_64-unknown-linux-gnu --target=x86_64-free                               bsd"...

crash: ./kernel.debug: no debugging data available

But this kernel.debug does have the debug sections:
# readelf --sections ./kernel.debug | grep -i debug
  [39] .debug_aranges    PROGBITS         0000000000000000  010e500b
  [40] .debug_pubnames   PROGBITS         0000000000000000  0110d7eb
  [41] .debug_info       PROGBITS         0000000000000000  012197dd
  [42] .debug_abbrev     PROGBITS         0000000000000000  034485ff
  [43] .debug_line       PROGBITS         0000000000000000  03557e9f
  [44] .debug_frame      PROGBITS         0000000000000000  0387a408
  [45] .debug_str        PROGBITS         0000000000000000  03985a90
  [46] .debug_loc        PROGBITS         0000000000000000  03b92d35
  [47] .debug_pubtypes   PROGBITS         0000000000000000  049b94f1
  [48] .debug_ranges     PROGBITS         0000000000000000  04da98be

So how is it possible to use crash to load FreeBSD dump?

Thanks in advance.
Jincheng Miao
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