Author Archives: daveti

About daveti

Interested in kernel hacking, compilers, machine learning and guitars.

Speculations on Intel SGX Card

Posted on March 25, 2019

One of the exciting things Intel has brought to RSA 2019 is Intel SGX Card [2]. Yet there is not much information about this coming hardware. This post collects some related documentation from Intel and speculates what could happen within … Continue reading →

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Syscall hijacking in 2019

Posted on February 25, 2019

Whether you need to implement a kernel rootkit or inspect syscalls for intrusion detection, in a lot of cases, you might need to hijack syscall in a kernel module. This post summorizes detailed procedures and provides a working example for … Continue reading →

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Kernel build on Nvidia Jetson TX1

Posted on December 31, 2018

This post introduces native Linux kernel built on the Nvidia Jetson TX1 dev board. The scripts are based on the jetsonhacks/buildJetsonTX1Kernel tools. Our target is JetPack 3.3 (the latest SDK supporting TX1 by the time of writing). All the scripts … Continue reading →

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Setting up Nvidia Jetson TX1

Posted on September 23, 2018

Starting from this post, I will share my learning and hacking experience on Nvidia Jetson TX1 dev board. This post discusses the installation issue of JetPack [4] and post-installation configurations for TX1. We assume users follow the JetPack 3.3 installation … Continue reading →

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Hacking Valgrind

Posted on July 7, 2018

This post talks about 3 commits I have recently added into my own valgrind tree [1], including the support for fsgsbase instructions, rdrand/rdseed instructions, and adding a new trapdoor (client request) to support gdb-like add-symbol-file command. Note that all these … Continue reading →

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Valgrind trapdoor and fun

Posted on July 7, 2018

Valgrind has a client request mechanism, which allows a client to pass some information back to valgrind. This includes asks valgrind to do a logging in its own environment, tells valgrind a range of VA being used as a new … Continue reading →

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Some notes on SGX OwnerEpoch and Sealing

Posted on June 24, 2018

Intel SGX has been there in the market for while. Yet there are still a lot of misundrestandings and mysteries about this technology. This post provides an introduction to Intel SGX OwnerEpoch and Sealing, discusses their security impacts, and speculates … Continue reading →

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