i386/127981: [loader] Stack underflow preventing boot

[Dylan Cochran]

>Number:         127981
>Category:       i386
>Synopsis:       [loader] Stack underflow preventing boot
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-i386
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Oct 09 19:30:00 UTC 2008
>Closed-Date:
>Last-Modified:
>Originator:     Dylan Cochran
>Release:        7.1-BETA
>Organization:
N/A
>Environment:
N/A
>Description:
Loader prints a 'Error: Stack underflow' after the copyright splash, and then bails out early with BIOS device 0xFFFFFFFF not found. It happened immediately after a freebsd-update -r 7.1-BETA, and is too early in the boot process to recover from without manual intervention. I'm going to get a 7.0-RELEASE loader back on the machine, and try building a firewire loader to trap the full output. 
>How-To-Repeat:
Most likely board related, I'll get a basic dmesg once I've been able to boot up something useful.
>Fix:
N/A

>Release-Note:
>Audit-Trail:
>Unformatted: