kern/52995: Booting uefi-install.img on a MacBook results in panic

[venture37%geeklan.co.uk@localhost]

>Number:         52995
>Category:       kern
>Synopsis:       Booting uefi-install.img on a MacBook results in panic
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Feb 09 15:55:00 +0000 2018
>Originator:     Sevan Janiyan
>Release:        NetBSD 8.99.12
>Organization:
>Environment:
>Description:
Attempting to boot an amd64 uefi-install.img on a white 13" MacBook (late 2009) MacBook6,1 results in a panic with graphics corruption and non functioning keyboard.

efi: systbl at pa 7fe9ef18
uvm_fault(0xffffffff815496c0, 0xffffe4007fe9e000, 1) -> e
fatal page fault in supervisor mode
trap type 6 code 0 rip 0xffffffff80238f45 cs 0x8 $ flags 0x10246 cr2 0xffffe1007fe9ef28 ilevel 0x8 rsp 0xffffffff917f8e60
curlwp 0xffffffff81481e20 pid 0.1 lowest kstack 0xffffffff817f52$$
kernel page fault trap, code=0
stopped in pid 0.1 (system) at netbsd:efi_getsystbl.part.4+0x4c movl 1
0(%rbx),%ecx

The graphics corruption made some characters unreadable and so I've used dollar sign instead, in the paragraph above.

It's possible to boot the non UEFI install image on the macbook, using the reEFIt with ACPI and SMP disabled. dmesg can be found here:
http://dmesgd.nycbug.org/index.cgi?do=view&id=3487
>How-To-Repeat:
Boot NetBSD-8.99.12-amd64-install.img on a MacBook
>Fix: