Author: kib
Date: Mon Aug 21 09:04:43 2017
New Revision: 322742
URL: https://svnweb.freebsd.org/changeset/base/322742
Log:
MFC r322495:
Add {rd,wr}{fs,gs}base C wrappers for instructions.
Modified:
stable/11/sys/amd64/include/cpufunc.h
Directory Properties:
stable/11/ (props changed)
Modified: stable/11/sys/amd64/include/cpufunc.h
==============================================================================
--- stable/11/sys/amd64/include/cpufunc.h Mon Aug 21 09:03:20 2017
(r322741)
+++ stable/11/sys/amd64/include/cpufunc.h Mon Aug 21 09:04:43 2017
(r322742)
@@ -651,6 +651,38 @@ load_gs(u_short sel)
}
#endif
+static __inline uint64_t
+rdfsbase(void)
+{
+ uint64_t x;
+
+ __asm __volatile("rdfsbase %0" : "=r" (x));
+ return (x);
+}
+
+static __inline void
+wrfsbase(uint64_t x)
+{
+
+ __asm __volatile("wrfsbase %0" : : "r" (x));
+}
+
+static __inline uint64_t
+rdgsbase(void)
+{
+ uint64_t x;
+
+ __asm __volatile("rdgsbase %0" : "=r" (x));
+ return (x);
+}
+
+static __inline void
+wrgsbase(uint64_t x)
+{
+
+ __asm __volatile("wrgsbase %0" : : "r" (x));
+}
+
static __inline void
bare_lgdt(struct region_descriptor *addr)
{
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