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From: Rebecca Cran <rebecca@bluestop.org>
To: "freebsd-current@FreeBSD.org" <freebsd-current@freebsd.org>
Subject: UEFI: How to go about updating the ESP with loader.efi during
 installworld
Date: Sun, 04 Nov 2018 14:20:08 -0700
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I'm currently working on creating and updating the ESP (EFI System Partition) 
for UEFI booting during installation and installworld. 

During installation, with my changes it gets mounted on /boot/efi and loader.efi 
copied into /boot/efi/EFI/FreeBSD and /boot/efi/EFI/BOOT. An entry gets added to 
/etc/fstab as noauto.

The issue comes during installworld, where we'll need to update the loader, 
and I'm not sure how we should handle that. 
If NO_ROOT isn't defined, do we just "mount /boot/efi", overwrite the files then 
unmount it? What should we do if NO_ROOT _is_ defined?

-- 
Rebecca