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[AArch64] Add support for the Call Stack Recorder extension
AbandonedPublic

Authored by pratlucas on Dec 1 2020, 6:35 AM.

Details

Summary

This introduces support for the Call Stack Recorder extension, through the
new 'csre' subtarget feature. The extension consists of a new set of system
registers and the new 'CSR PDEC' instruction.

Based on patches written by Simon Tatham and Victor Campos.

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