Partial TAKE 793150 - Fix btp on active tasks

[kaos@xxxxxxxxxxxxxxxxxxxxxx (Keith Owens)]

kdb btp on active tasks should now work.  kdb saves thread.e[is]p
on entry to kdb to give a consistent interface.

Modid:  2.4.0-test1-xfs:slinx:64553a
Date:  Sun Jun 18 19:14:38 PDT 2000
Workarea:  
kao1.melbourne.sgi.com:/hosts/sherman/home/kaos/isms/slinx/2.4.0-test1-xfs
Author:  kaos

The following file(s) were checked into:
  bonnie.engr.sgi.com:/isms/slinx/2.4.0-test1-xfs

linux/arch/i386/kdb/kdbasupport.c - 1.4
http://oss.sgi.com/cgi-bin/cvsweb.cgi/linux-2.4-xfs/linux/arch/i386/kdb/kdbasupport.c.diff?r1=text&tr1=1.4&r2=text&tr2=1.3&f=h
linux/include/linux/kdbprivate.h - 1.3
http://oss.sgi.com/cgi-bin/cvsweb.cgi/linux-2.4-xfs/linux/include/linux/kdbprivate.h.diff?r1=text&tr1=1.3&r2=text&tr2=1.2&f=h
linux/kdb/kdbmain.c - 1.6
http://oss.sgi.com/cgi-bin/cvsweb.cgi/linux-2.4-xfs/linux/kdb/kdbmain.c.diff?r1=text&tr1=1.6&r2=text&tr2=1.5&f=h