Category: Software Debug and Trace – Intel

Securing JTAG-based At-Scale Debug

Alan Sguigna

June 18, 2017
4:14 pm

Security through obscurity is not a meaningful means to mitigate malevolent attacks. With the greater forensics capabilities offered by At-Scale Debug (ASD), how are platforms protected?

The MinnowBoard Chronicles Episode 18: Reverse-Engineering Code Execution

Alan Sguigna

June 11, 2017
1:55 pm

In my last article, I used Last Branch Record (LBR) Trace to manually capture UEFI program flow source and destination addresses. This week, I look at the associated instruction opcodes and mnemonics and try to figure out what is going on.

The Minnowboard Chronicles Episode 17: Using LBR Trace without Source Code

Alan Sguigna

May 26, 2017
2:24 pm

My curiosity got the better of me this week. I decided to play detective, and see what I can learn from LBR trace data if I pretend I don’t have access to the source code.

The Minnowboard Chronicles Episode 16: Delving into LBR Trace

Alan Sguigna

May 21, 2017
4:45 pm

This week, I decided to do a thorough analysis of how Last Branch Record (LBR) trace works, to see how useful it is in tracing back what might be the root cause of system failures.

The Minnowboard Chronicles Episode 15: More UEFI Application Development in ‘C’

Alan Sguigna

May 14, 2017
2:55 pm

In Episode 12, I wrote a simple “Hello World!” application in ‘C’ using the built-in UEFI shell functions. In Episode 13, I failed in an attempt to re-write that application using standard ‘C’ library functions, such as printf(). I’ve learned a lot since then – here’s how to write more sophisticated programs.

The Minnowboard Chronicles Episode 14: Poking around SecCore in UEFI

Alan Sguigna

May 6, 2017
4:12 pm

This week, I poke around the code from the reset vector, in the heart of the CPU initialization firmware, and try to reverse-engineer what is going on.

The Minnowboard Chronicles Episode 13: UEFI Applications using Standard ‘C’

Alan Sguigna

April 17, 2017
3:36 am

This week, I updated the firmware on the Minnowboard Turbot to the latest release, and struggled with creating a UEFI application using standard ‘C’ functions.

The Minnowboard Chronicles Episode 12: Writing UEFI Applications

Alan Sguigna

April 9, 2017
6:22 pm

In Episode 10 of the Minnowboard Chronicles, I created my first UEFI Shell script. Today, I “up my game” by writing an actual application in ‘C’.

The Minnowboard Chronicles Episode 11: Using Instruction Trace

Alan Sguigna

April 2, 2017
4:44 pm

I discover an incredible Trace capability that’s built into the Intel Atom Bay Trail chip!

The Minnowboard Chronicles Episode 10: The UEFI Shell

Alan Sguigna

March 26, 2017
4:03 pm

Today, I created my first UEFI shell script. And, by a happy coincidence, I noticed a new book in Amazon, Harnessing the UEFI Shell, by Michael Rothman, Vince Zimmer, and Tim Lewis.

Category: Software Debug and Trace – Intel

Securing JTAG-based At-Scale Debug

The MinnowBoard Chronicles Episode 18: Reverse-Engineering Code Execution

The Minnowboard Chronicles Episode 17: Using LBR Trace without Source Code

The Minnowboard Chronicles Episode 16: Delving into LBR Trace

The Minnowboard Chronicles Episode 15: More UEFI Application Development in ‘C’

The Minnowboard Chronicles Episode 14: Poking around SecCore in UEFI

The Minnowboard Chronicles Episode 13: UEFI Applications using Standard ‘C’

The Minnowboard Chronicles Episode 12: Writing UEFI Applications

The Minnowboard Chronicles Episode 11: Using Instruction Trace

The Minnowboard Chronicles Episode 10: The UEFI Shell

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