adb trace fix

[Vic Abell]

If you are running a 2.9BSD kernel with networking, you may have noticed
that adb won't give a call trace ($c or $C).  This is a result of adb's
inability to deal with a USIZE > 16.  The following change to setup.c in
/usr/src/bin/adb will correct the problem.

< current -- setup.c -- modified >

242c242,243
< 			  if ((ar0>(POS *)0140000) & (ar0<(POS *)0142000)
---
> 			  if ((ar0>(POS *)0140000)
> 			      && (ar0<(POS *)(0142000+ctob(USIZE)))
244c245
< 				uar0 = ar0 - 0140000 + (unsigned)corhdr;
---
> 				uar0=(POS *)&corhdr[(int)(ar0-(POS *)0140000)];

Vic Abell, Purdue University Computing Center
	   ...!pur-ee!j.cc.purdue.edu!abe
	   abe at j.cc.purdue.edu