Changeset 71701 in vbox

Timestamp:

Apr 6, 2018 11:33:13 AM (7 years ago)

Author:

vboxsync

Message:

iprt/cdefs.h: Use lfence for RT_UNTRUSTED_VALIDATED_FENCE on both amd64 and x86.

File:

• trunk/include/iprt/cdefs.h (modified) (1 diff)

trunk/include/iprt/cdefs.h

@@ -1625 +1625 @@
  * What this translates to is architecture dependent.  On intel it will
  * translate to a CPU load+store fence as well as a compiler memory barrier. */
-#if   defined(RT_ARCH_AMD64)
-# define RT_UNTRUSTED_VALIDATED_FENCE()         do { ASMCompilerBarrier(); ASMMemoryFenceSSE2(); } while (0)
+#if defined(RT_ARCH_AMD64) || (defined(RT_ARCH_X86) && !defined(RT_WITH_OLD_CPU_SUPPORT))
+# define RT_UNTRUSTED_VALIDATED_FENCE()         do { ASMCompilerBarrier(); ASMReadFence(); } while (0)
 #elif defined(RT_ARCH_X86)
 # define RT_UNTRUSTED_VALIDATED_FENCE()         do { ASMCompilerBarrier(); ASMMemoryFence(); } while (0)