Hi Fabrice, Couple of questions to understand this better - 1. Is the reference design DANIEL platform you work on downloaded from https://developer.arm.com/tools-and-software/open-source-software/arm

Hi All, The StandaloneMmCoreEntryPoint library for AArch64 platforms uses DebugLib APIs in the code path starting from '_ModuleEntryPoint' to the point at which 'ProcessModuleEntryPointList' is called

Please check if this link helps - https://github.com/tianocore/tianocore.github.io/wiki/Laszlo's-unkempt-git-guide-for-edk2-contributors-and-maintainers