CyberLeo.Net >> Repos - FreeBSD/FreeBSD.git/commit

author	kib <kib@FreeBSD.org>
	Sat, 3 Oct 2020 23:17:29 +0000 (23:17 +0000)
committer	kib <kib@FreeBSD.org>
	Sat, 3 Oct 2020 23:17:29 +0000 (23:17 +0000)
commit	62a9018a8878533432500e5cb89f9bd07fd9ef14
tree	8e1e25c0250638f5055a13e9e0f9b44fd7f94dfc	tree \| snapshot
parent	8033907adaea56d2ac46e5ffcce3acb82cf04c61	commit \| diff

amd64: Store full 64bit of FIP/FDP for 64bit processes when using XSAVE.

If current process is 64bit, use rex-prefixed version of XSAVE
(XSAVE64). If current process is 32bit and CPU supports saving
segment registers cs/ds in the FPU save area, use non-prefixed variant
of XSAVE.

Reported and tested by: Michał Górny <mgorny@mgorny@moritz.systems>
PR: 250043
Reviewed by: emaste, markj
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D26643

sys/amd64/amd64/cpu_switch.S		diff \| blob \| history
sys/amd64/amd64/fpu.c		diff \| blob \| history
sys/amd64/include/md_var.h		diff \| blob \| history