powerpc/175151: Loader fails to load modules on PPC64

[Guy M. Broome]

>Number:         175151
>Category:       powerpc
>Synopsis:       Loader fails to load modules on PPC64
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-ppc
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Jan 09 01:30:00 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator:     Guy M. Broome
>Release:        9.1-RELEASE
>Organization:
Virginia Commonwealth University
>Environment:
FreeBSD YeOldeMacG5.local1707.net 9.1-RELEASE FreeBSD 9.1-RELEASE #0: Wed Dec  5 22:23:59 UTC 2012     root at anacreon.physics.wisc.edu:/usr/obj/usr/src/sys/GENERIC64  powerpc
>Description:
When attempting to load modules before kernel execution, the following error message is given (example module name used):

---(BEGIN LOADER OUTPUT)---

/boot/kernel/if_tap.ko text=0x176 data=0x121+0x212 syms=[0x8+0xed+0x8+0xa2d]
loading required module ''
can't find ''

---(END LOADER OUTPUT)---

The requested module fails to load, and shown by lsmod (in loader) and kldstat (post-boot), and the functionality is not available in the booted system.

The problems occurs regardless of whether or not a proper linker.hints is present; loader behavior does not change either way.

All tested modules are affected.  Each modules loads and functions normally post-boot.
>How-To-Repeat:
System:
  Power Mac G5 dual-CPU
  4GB RAM
  FreeBSD 9.1 installed to local HDD, using standard APM maps and UFS partitions.

Attempt to load a module at boot.  The load fails.
>Fix:
No fix known at this time; attempted stock 9.1R loader / kernel / modules, as well as custom-built variants.  All produce the same error.

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