On Tue, 23 Sep, at 08:00:31AM, Nathan Whitehorn wrote:
> Could you try adding -mno-avx2 to /sys/boot/amd64/Makefile.inc line 9?

Do you pull the -mno-redzone flag anywhere? I'm looking through the
loader sources now, and I see that switch in sys/conf/kern.mk, but it
doesn't look like that's being pulled in for the boot loader source.

Calling into EFI will trash the x86-64 redzone, if you've got it

Matt Fleming, Intel Open Source Technology Center
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