If any possibility to share any one of below images how to build it .
1.sec_usb_xloader.img
2.sec_uce_boot.img
3.sec_fastboot.img
as long as it relate to UFS init flow and read/write behavior?
Ref : https://github.com/96boards-hikey/tools-images-hikey960/blob/master/README-technical.md
As I understand you will not get the desired answer here 
You should simply use them without debug.
Nobody even knows what them for.
Good to hear that . at least share to whom may having this “desired”,too. 
Thanks Lo~ Sir.
urw
Me too glad to see that I’m not alone.
btw, I’ve asked similar question before, but unfortunately wasn’t satisfied by present answers.
That was a thread - What is Hikey960 mechanism of booting? .
I wish for both of us a good luck!
sec_uce_boot.img is a very small binary with the 4K header, containing some kind of digital signature. Disassembling it is a feasible task, even using objdump -D 
It is not clear why there is no published source code for hikey_idt.c,
since hikey_idt.py uses more or less the same (if not identical) packet protocol.
Anyway, seems like binary code is encrypted, so objdump will not help.
The only available information is a build date, which is “Apr 1 2017”.
This binary is kind of April fools’ day joke?
The strings in the text segment are not encrypted, why do you think that the code is encrypted ?
Yes, you’re right. Code is not encrypted.
