According AN4555 PDF file at the page 19 has like below message:
The first signature will be used with CALL HAB with offset 0x24 showing original
value ‘0’ and second signature used for authenticating linux_prep with JUMP HAB showing a
value of 1 at offset 0x24. We do this by first copying linux_prep, bin to linux_kernel.bin, then
manually modify byte 0x24 to 1 using a hex editor and include linux_kernel.bin in linux_kernel.csf
for signature generation.
cp linux_prep.bin linux_kernel.bin
using a hex editor set byte 0x24 to 1
These message what meaning？ How can i sure what offset byte is 0x24 and modify to 0?