Hello,
I am new to EFI development and I am trying to implement measured boot
and attestation using EDK2. Right now, I'm just trying to understand
how to run non-application modules using the EDK2 Emulator.
I've built and run the Emulator successfully (Fedora 22 64-bit), and
I've been able to run the HelloWorld.efi application successfully from
the EDK2 shell. However, if I try to load a module that is not an
application (for example, PeiCore.efi) using "load PeiCore.efi", I get
the following output from gdb:
0x48ceb240 Loading
<path>/edk2/Build/Emulator/DEBUG_GCC49/X64/MdeModulePkg/Core/Pei/PeiMain/DEBUG/PeiCore.dll
with entry point 0x48ceb240
Loading driver at 0x00048CEB000 EntryPoint=0x00048CEB240 PeiCore.efi
InstallProtocolInterface: BC62157E-3E33-4FEC-9920-2D3B36D750DF 48E0CD18
Program received signal SIGSEGV, Segmentation fault.
Then, the gdb output shows a bunch of symbol tables being added, and
finally stops with:
0x0000000048cee984 in PeiCoreBuildHobHandoffInfoTable (BootMode=0,
MemoryBegin=0, MemoryLength=205)
at <path>/edk2/MdeModulePkg/Core/Pei/Hob/Hob.c:150
150 Hob->Header.HobType = EFI_HOB_TYPE_HANDOFF;
(gdb)
At this point, I have to quit GDB and close the emulator session. I get
similar errors with other non-application modules. Am I doing this
correctly? Can I load these images from the EFI shell prompt, or do
they need to be loaded in a different manner? My end goal is to be able
to use TcgPei.efi, which I believe is a PEIM for doing measurement and
event logging.
David
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