An open-source Simple Tracing Format specification
Simple Trace Format (STF) is a binary file format for storing instruction traces, agnostic of instruction set architecture. The format defines a standard for capturing information related to instructions, associated register values, memory access addresses and data associated with them, as well as additional context information such as page table walk, interrupts, bus/fabric transaction addresses/data, etc. This document also specifies how tools generating and/or modifying traces can express information which can aid the tools consuming the traces to interpret them appropriately.
An online version of this spec is available here.