Loading pcmemtest on UEFI

[Gordon Messmer]

I'm trying to load PCMemTest on a UEFI Fedora system.

https://github.com/martinwhitaker/pcmemtest

After placing the binary on the ESP, I'm able to create an entry with 
efibootmgr to load it directly from the UEFI boot menu, and it works as 
expected, so I'm certain that the binary is "good".

However,  I haven't been able to load the program from GRUB 
successfully.  The program's documentation says that it supports the 
UEFI handover boot protocol, and I've tried loading it using "linux 
/<path>/pcmemtest.efi", which doesn't seem to do anything.  As far as I 
can tell, the system halts.  I've also tried chainloading the binary, 
and when that entry is selected, GRUB immediately returns to its menu.

Does anyone have any basic hints for me at this point, either things 
that I should try, or anything that might tell me what's happening after 
the handover?