Benjamin Berg 5298b7cffa um: add back support for FXSAVE registers ... It was reported that qemu may not enable the XSTATE CPU extension, which is a requirement after commit 3f17fed214 ("um: switch to regset API and depend on XSTATE"). Add a fallback to use FXSAVE (FP registers on x86_64 and XFP on i386) which is just a shorter version of the same data. The only difference is that the XSTATE magic should not be set in the signal frame. Note that this still drops support for the older i386 FP register layout as supporting this would require more backward compatibility to build a correct signal frame. Fixes: 3f17fed214 ("um: switch to regset API and depend on XSTATE") Reported-by: SeongJae Park <sj@kernel.org> Closes: https://lore.kernel.org/r/20241203070218.240797-1-sj@kernel.org Tested-by: SeongJae Park <sj@kernel.org> Signed-off-by: Benjamin Berg <benjamin.berg@intel.com> Link: https://patch.msgid.link/20241204074827.1582917-1-benjamin@sipsolutions.net Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Richard Weinberger <richard@nod.at>		2025-02-12 23:40:10 +01:00
..
Makefile	um: Discover host_task_size from envp	2024-10-10 13:37:22 +02:00
mcontext.c	um: Add missing headers	2024-04-22 21:46:20 +02:00
registers.c	um: add back support for FXSAVE registers	2025-02-12 23:40:10 +01:00
tls.c	um: Add missing headers	2024-04-22 21:46:20 +02:00