[kdb] disassemblers

[Christoph Hellwig]

One of the most ugly pieces of kdb are the disassemblers which are
copy & paste versions from binutils.  Nowdays some architectures
(s390 for quite a while and now sh, too) come with their own clean-sheat
disassembler.  What would people think about adding a proper one to x86
for kdb, especially now that binutils has switched to GPLv3 and new
versions can't imported.  That would be one major step for getting kdb
into a mainline-submittable form.