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CoreInitializeMemoryServices() logs "BaseAddress" and "Length" with DEBUG() before DxeMain() calls ProcessLibraryConstructorList() explicitly. (Library construction is not an automatic part of the DXE Core entry point.) So those DEBUG()s in CoreInitializeMemoryServices() are issued against an un-constructed DebugLib, and also against a -- possibly underlying -- un-constructed SerialPortLib. Some DebugLib instances can deal with this (see for example commit 91a5b1365075, "OvmfPkg/PlatformDebugLibIoPort: fix port detection for use in the DXE Core", 2018-08-06), while some others can't (see for example the DebugLib instance "MdePkg/Library/BaseDebugLibSerialPort/BaseDebugLibSerialPort.inf" coupled with the SerialPortLib instance "ArmVirtPkg/Library/FdtPL011SerialPortLib/FdtPL011SerialPortLib.inf"). Addressing this issue in a SerialPortLib instance that underlies BaseDebugLibSerialPort seems wrong; either the DebugLib instance should cope directly with being called un-constructed (see again commit 91a5b1365075), or the DXE Core should log relevant information *at least* after library instances have been constructed. This patch implements the latter (only for the "BaseAddress" and "Length" values calculated by CoreInitializeMemoryServices()). Cc: Ard Biesheuvel <ard.biesheuvel@arm.com> Cc: Dandan Bi <dandan.bi@intel.com> Cc: Hao A Wu <hao.a.wu@intel.com> Cc: Jeff Brasen <jbrasen@nvidia.com> Cc: Jian J Wang <jian.j.wang@intel.com> Cc: Leif Lindholm <leif@nuviainc.com> Cc: Liming Gao <gaoliming@byosoft.com.cn> Cc: Philippe Mathieu-Daudé <philmd@redhat.com> Signed-off-by: Laszlo Ersek <lersek@redhat.com> Message-Id: <20201103161557.30621-1-lersek@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>