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Well, Apple has been shipping ARM devices running XNU for the past fourteen years so there’s probably little value in a simulator when they can use real hardwar

by lukeh 6y ago

Well, Apple has been shipping ARM devices running XNU for the past fourteen years so there’s probably little value in a simulator when they can use real hardware.

saagarjha 6y ago
Apple uses simulators for bringup, there are references to a “fastsim” (probably an FPGA?) sprinkled in the open source releases, with special debug instructions encoded as hints (for tracing presumably).
deleted 6y ago
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