Ryan Houdek f78e194cf7 Linux/GuestFrames: Ensure MXCSR is saved and restored on signal ...

This was causing an unfortunate set of circumstances where Dark Souls
III was modifying MXCSR and we weren't saving it, cause the value to change
from 0x9fc0 to 0.

This "enabled" float exceptions by unmasking the exception masks in
MXCSR. This in turn had Dark Souls III's `expf` function to fault out,
as it checks if the MXCSR exception masks are set or not for determining
if underflow should assert or not.

Wow64/arm64ec has a similar problem where it always sets back to default
on signal. Which means game lose DAZ, but I'm not fixing that bug right
now.

Fixes #5391

2026-03-28 17:44:45 -07:00

..

GuestFramesManagement.cpp

Linux/GuestFrames: Ensure MXCSR is saved and restored on signal

2026-03-28 17:44:45 -07:00