Porting UEFI to Apple PowerPC…

Porting UEFI to a new architecture:
So it turns out that blogging about something after the fact is pretty tough. I really wanted to blog about my PoC port of UEFI to the OpenPower ecosystem, but it’s incredibly difficult to go back and try to systematize something that’s been a few years back. So let’s try this again. This time, our victim will be a G4 12″ PowerBook6,8 with a 7447A. That’s a 32-bit PowerPC. Now, I’ll go in small steps and document everything. For added fun, we’ll begin porting on the target itself, at least until that gets too tedious. Also, I’ve a few OldWorld machines, a spare G4 12″ for parts and a G5, so hopefully this odyssey won’t be interrupted by old and failing hardware ;-). Keep in mind that each part is checked in along with the source code, so look at the entire commit. Each blog post will focus on the most important details.[…]





Alex updates smmtestbuildscript for Fedora 26 and QEMU 2.9

A while ago[1], Alex Floyd of PreOS Security wrote a shell script to help codify this wiki article[2] by Laslo Ersek of Red Hat, setting up a UEFI SMM/OVMF testing environment for Fedora-based systems. Recently, Alex updated this script to work with the recently-released Fedora 26. Quoting email from Alex on the changes in this release:

The build script has been updated for Fedora 26 support. It now uses the native QEMU 2.9 library from Fedora 26 and no longer builds a snapshot of QEMU 2.9 which makes some new testing possibilities available.


[1] https://firmwaresecurity.com/2017/04/19/shell-script-for-laszlos-smm-test-environment-article/

[2] https://github.com/tianocore/tianocore.github.io/wiki/Testing-SMM-with-QEMU,-KVM-and-libvirt




Hao Wu of Intel posted a patch to EDK2 which provides support for UEFI’s “EFI Partition Infomation Protocol”, and includes a DumpPartInfo tool:

Add the EFI Partition Information Protocol per the latest UEFI spec.

Test for the series:
A simple application called ‘DumpPartInfo’ is used to dump the contents of the Partition Information protocols when the following devices are attached:
a. MBR Hard disk
b. GPT Hard disk

The source of the application and the series is available at:
https://github.com/hwu25/edk2 branch:partition_info_test

8 files changed, 216 insertions(+), 88 deletions(-)


UEFI UDK2017 pre-release available

Brian Richardson of Intel announced a pre-release of UDK2017, a snapshot of the Tianocore.org EDK2 trunk code matching a set of UEFI.org specs.

Information on UDK2017, the next stable snapshot release of EDK II, is available on the TianoCore wiki.

From the release page on the wiki, here’s the list of

UDK2017 Key Features
    Industry Standards & Public Specifications
        UEFI 2.6
        UEFI PI 1.4a
        UEFI Shell 2.2
        SMBIOS 3.1.1
        Intel® 64 and IA-32 Architectures Software Developer Manuals
    Storage Technologies
        RAM Disk (UEFI 2.6, Section 12.17, RAM Disk Protocol)
        GCC 5.x
    OpenSSL 1.1.0
    Adapter Information Protocol
    Regular Expression Protocol
    Signed Capsule Update
    Signed Recovery Images
    SMM Communication Buffer Protections
    STM Launch
    Memory Allocation/Free Profiler
    NX Page Protection in DXE
    LZMA Compression 16.04
    Brotli Compression
    MP Init Library


More info:


Shell script for Laszlo’s SMM test environment article

Laszlo Ersek of Red Hat wrote a wiki article on tianocore.org[1], showing how to setup the EDK2 with QEMU/OVMF for testing SMM code using Fedora.

Recently, Alex Floyd of PreOS Security wrote a shell script to codify this wiki article[2].

Laszlo’s wiki is dense, I expect this script will be useful for some UEFI firmware engineers and security researchers.

According to Alex, “some things needed tweaking to get to work, and the Windows portion of the tutorial is not included in the script.”

[1] https://github.com/tianocore/tianocore.github.io/wiki/Testing-SMM-with-QEMU,-KVM-and-libvirt

[2] https://github.com/gencymex/smmtestbuildscript