diff options
| author | Konstantin Belousov <kib@FreeBSD.org> | 2025-09-19 02:37:14 +0000 |
|---|---|---|
| committer | Konstantin Belousov <kib@FreeBSD.org> | 2025-09-24 13:02:27 +0000 |
| commit | 50ee990e1874d6d40b8e3dc359c37e2ef2ebf477 (patch) | |
| tree | 7351fbfaa32a1472db2fedc78ed0266a5172aea2 | |
| parent | 86114bae092bd023165e5b9df244fc0849172429 (diff) | |
amd64 cpufunc.h: add rcs(), to read code selector
Reviewed by: markj
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D52607
| -rw-r--r-- | sys/amd64/include/cpufunc.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/sys/amd64/include/cpufunc.h b/sys/amd64/include/cpufunc.h index e6c9f47ea261..9a4c82275a99 100644 --- a/sys/amd64/include/cpufunc.h +++ b/sys/amd64/include/cpufunc.h @@ -572,6 +572,15 @@ rss(void) return (sel); } +static __inline u_short +rcs(void) +{ + u_short sel; + + __asm __volatile("movw %%cs,%0" : "=rm" (sel)); + return (sel); +} + static __inline void load_ds(u_short sel) { |