New alpha 5.x bug

[Andrew Gallatin]

Kris Kennaway writes:
 > On a whim, I updated one of the alpha package machines to -current.
 > It lasted a few hours under load before going into an infinite loop
 > displaying the following on the console:
 > 
 > prologue botch: displacement 32
 > frame size botch: adjust register offsets?
 > frame size botch: adjust register offsets?
 > prologue botch: displacement 32
 > frame size botch: adjust register offsets?
 > frame size botch: adjust register offsets?
 > prologue botch: displacement 32

Its coming from the ddb stack trace code.

I imagine that you're probably panic'ing with a trashed stack, and ddb
is horribly confused.  Try disabling ddb traces on panic and LORs and
see if you can get a real panic message (or log the console output to
a file if its via a serial console).

Drew