Changeset 9720 in vbox for trunk/src/VBox/VMM/VMMAll

Timestamp:

Jun 16, 2008 1:12:04 PM (17 years ago)

Author:

vboxsync

Message:

Emulate rdmsr & wrmsr.
Note that Intel mentions a (slightly different) REX.W version of RDMSR.

File:

• trunk/src/VBox/VMM/VMMAll/EMAll.cpp (modified) (2 diffs)

trunk/src/VBox/VMM/VMMAll/EMAll.cpp

@@ -2144 +2144 @@
     int      rc;
 
-    /* Note: works the same in 32 and 64 bits modes. */
+    /** @todo According to the Intel manuals, there's a REX version of RDMSR that is slightly different.
+     *  That version clears the high dwords of both RDX & RAX */
     rc = CPUMQueryGuestCtxPtr(pVM, &pCtx);
     AssertRC(rc);
@@ -2228 +2229 @@
 static int emInterpretRdmsr(PVM pVM, PDISCPUSTATE pCpu, PCPUMCTXCORE pRegFrame, RTGCPTR pvFault, uint32_t *pcbSize)
 {
+    Assert(!(pCpu->prefix & PREFIX_REX));
     return EMInterpretRdmsr(pVM, pRegFrame);
 }