I wrote a detailed walk-through of the illumos syscall handler back in 2016. It's missing the updates around KPTI (meltdown mitigation), but other than that the

I wrote a detailed walk-through of the illumos syscall handler back in 2016. It's missing the updates around KPTI (meltdown mitigation), but other than that the mechanisms should be unchanged. https://zinascii.com/2016/the-illumos-syscall-handler.html https://zinascii.com/2016/the-illumos-syscall-handler.html