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ASSET implements in-situ diagnostics via direct support of the x86 JTAG-based run-control API down on the target. The run-control API are synonymous with lower-level Intel In-Target Probe (ITP) procedures. What follows is a sample โ€˜Cโ€™ routine written to dump the contents of the machine check registers, in the event of a system wedge (for example, a three-strike event).
System Management Mode (SMM) is an x86 operating mode in which all normal execution, including the operatingย system, is suspended. SMM is of interest to cybersecurity specialists (black hat and white hat) because it can also be abused to run high-privilegedย rootkits. This week, I decided to use SourcePoint to explore some of its mysteries.
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