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Thoughts dereferenced from the scratchpad noise.

Latest posts


Meltdown and Spectre on PC Engines apu2

Published at May 29, 2019 · Michał Żygowski ·  9 min read

As a continuation the Meltdown and Spectre blog post, this post present the vulnerability status and mitigation with microcode update on PC Engines apu2. Read the post and get to know the open source tools for vulnerability and mitigation checks, as well as exploiting proof of concepts....

Categories: firmware security

Reproducible builds

Published at May 22, 2019 · Krystian Hebel ·  3 min read

Recently we made sure that every build of PC Engines' firmware is built in a reproducible manner. This short post shows what exactly does it mean and why this should be important to firmware developers....

Categories: firmware

Building and running Bareflank

Published at May 15, 2019 · Krystian Hebel ·  13 min read

In this second post of a series, we will build and start our first hypervisor. It won't do much just yet, but it is good to get known with its build system....

Categories: firmware

5 terms every hypervisor developer should know

Published at April 30, 2019 · Krystian Hebel ·  11 min read

This is the first post of a series about developing bare-metal hypervisors. It introduces to Intel's VMX technology, describes interactions between a virtual machine and a hypervisor as well as gives some insight on the control structures required. This post should give some theoretical knowledge base required for the next ones, in which we will implement a basic hypervisor....

Categories: firmware

USB Sniffing With OpenVizsla

Published at April 24, 2019 · Łukasz Wcisło ·  11 min read

OpenVizsla allows to passively monitor the communication between a USB host and USB peripheral. It is a tool for developers working with USB and especially those who are using USB in embedded designs. We have tested its possible use cases and see it is really valuable, and has a lot of potential for further development....

Categories: miscellaneous security