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JTAG debug of a Windows kernel driver performing an invalid memory access

Alan Sguigna

August 11, 2024
4:15 pm

Using advanced Intel trace features enabled only via JTAG, such as Architectural Event Trace (AET) and Intel Processor Trace, gives insight into root cause of kernel driver out-of-bounds memory access, mitigating BSODs.

Large embedded programming files slowing you down?

John Akin

July 30, 2024
3:46 pm

The more complex the embedded FPGA design or system image file the longer it takes to program. The longer it takes to program, the more expensive production is. This is especially true for when embedded files get larger than 10MB. Read more on how Fast Flash Programming can help to dramatically reduce programming times.

JTAG debug of Windows Hyper-V / Secure Kernel with WinDbg and EXDI: Part 9

Alan Sguigna

July 28, 2024
3:33 pm

Using Intel Processor Trace and Architectural Event Trace to explore the very lowest level of the Windows boot.

JTAG debug of Windows Hyper-V / Secure Kernel with WinDbg and EXDI: Part 8

Alan Sguigna

July 21, 2024
1:04 pm

This article uses the SourcePoint JTAG debugger to explore the very earliest part of the Windows boot flow, where the Secure Kernel is initialized in VTL 0 by the Windows and Hypervisor loaders.

JTAG debug of Windows Hyper-V / Secure Kernel with WinDbg and EXDI: Part 7

Alan Sguigna

July 14, 2024
8:41 pm

Architectural Event Trace (AET) can only be used with JTAG. This blog describes the use of AET to explore Windows Hyper-V and the Secure Kernel.

Dramatically Reduce Test Times With Fast Programming

John Akin

June 18, 2024
4:09 am

New techniques are significantly reducing in-system programming times. Learn about the three mechanisms for programming flash memory via ScanWorks.

JTAG debug of Windows Hyper-V / Secure Kernel with WinDbg and EXDI: Part 6

Alan Sguigna

June 16, 2024
11:56 am

Learning more about Hyper-V by following Connor McGarr's footsteps in his blog, Windows Internals: Dissecting Secure Image Objects - Part 1.

JTAG debug of Windows Hyper-V / Secure Kernel with WinDbg and EXDI: Part 5

Alan Sguigna

March 25, 2024
3:11 pm

In the last couple of articles in this series, I’ve focused on basic run-control debugging used in conjunction with Intel Processor Trace (Intel PT). In this installment, we’ll start looking at the use of Architectural Event Trace (AET) to explore the Windows hypervisor, and how MSR accesses in particular are handled.

JTAG debug of Windows Hyper-V / Secure Kernel with WinDbg and EXDI: Part 4

Alan Sguigna

March 17, 2024
4:14 pm

In this article, we’ll look at some of the fields within the VMCS, and change them to combat some of the mitigations against instruction trace within Windows.

JTAG debug of Windows Hyper-V / Secure Kernel with WinDbg and EXDI: Part 3

Alan Sguigna

March 3, 2024
1:34 pm

Debugging the Secure Kernel with JTAG, EXDI, LBR and Intel PT.

JTAG debug of a Windows kernel driver performing an invalid memory access

Large embedded programming files slowing you down?

JTAG debug of Windows Hyper-V / Secure Kernel with WinDbg and EXDI: Part 9

JTAG debug of Windows Hyper-V / Secure Kernel with WinDbg and EXDI: Part 8

JTAG debug of Windows Hyper-V / Secure Kernel with WinDbg and EXDI: Part 7

Dramatically Reduce Test Times With Fast Programming

JTAG debug of Windows Hyper-V / Secure Kernel with WinDbg and EXDI: Part 6

JTAG debug of Windows Hyper-V / Secure Kernel with WinDbg and EXDI: Part 5

JTAG debug of Windows Hyper-V / Secure Kernel with WinDbg and EXDI: Part 4

JTAG debug of Windows Hyper-V / Secure Kernel with WinDbg and EXDI: Part 3

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