Nowadays UEFI PE bootable image is more and more popular on the distribution. But it is still an open issue to load that kind of image by kexec with IMA enabled *** A brief review of the history *** There are two categatories methods to handle this issue. -1. UEFI service emulator for UEFI stub -2. PE format parser For the first one, I have tried a purgatory-style emulator [1]. But it confronts the hardware scaling trouble. For the second one, there are two choices, one is to implement it inside the kernel, the other is inside the user space. Both zboot-format [2] and UKI-format [3] parsers are rejected due to the concern that the variant format parsers will inflate the kernel code. And finally, we have these kinds of parsers in the user space 'kexec-tools'.
