Demystifying the Secure Enclave Processor
LytVKz
LytVKz
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Interrupt-based Message Passing<br />
• When sending a message, <strong>the</strong> AP writes to <strong>the</strong><br />
inbox of <strong>the</strong> mailbox<br />
• This operation triggers an interrupt in <strong>the</strong> SEP<br />
▫ Informs <strong>the</strong> SEP that a message has been received<br />
• When a reply is ready, <strong>the</strong> SEP writes a message<br />
back to <strong>the</strong> outbox<br />
▫ Ano<strong>the</strong>r interrupt is generated in order to let <strong>the</strong><br />
AP know a message was received