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14.8. Context ID tracing

The ETM detects the MCR instruction that changes the context ID, and traces the appropriate number of bytes as a context ID packet instead of a normal data packet. As a result, if context ID tracing is enabled, an MCR instruction that changes the context ID does not have its data traced separately.

Because the ETM has a secure and a nonsecure context ID, the ETM outputs a context ID when switching between secure and nonsecure states.

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