Changeset 39974 in vbox for trunk

Timestamp:

Feb 2, 2012 9:59:25 PM (13 years ago)

Author:

vboxsync

Message:

IEM: Implemented rdmsr.

Location:

trunk/src/VBox/VMM/VMMAll

Files:

• IEMAllCImpl.cpp.h (modified) (2 diffs)
• IEMAllInstructions.cpp.h (modified) (2 diffs)

trunk/src/VBox/VMM/VMMAll/IEMAllCImpl.cpp.h

@@ -2878 +2878 @@
 
 
-
 /**
  * Implements RDTSC.
@@ -2908 +2907 @@
     pIemCpu->fIgnoreRaxRdx = true;
 #endif
+
+    iemRegAddToRip(pIemCpu, cbInstr);
+    return VINF_SUCCESS;
+}
+
+
+/**
+ * Implements RDMSR.
+ */
+IEM_CIMPL_DEF_0(iemCImpl_rdmsr)
+{
+    PCPUMCTX pCtx = pIemCpu->CTX_SUFF(pCtx);
+
+    /*
+     * Check preconditions.
+     */
+    if (!IEM_IS_INTEL_CPUID_FEATURE_PRESENT_EDX(X86_CPUID_FEATURE_EDX_MSR))
+        return iemRaiseUndefinedOpcode(pIemCpu);
+    if (pIemCpu->uCpl != 0)
+        return iemRaiseGeneralProtectionFault0(pIemCpu);
+
+    /*
+     * Do the job.
+     */
+    RTUINT64U uValue;
+    int rc = CPUMQueryGuestMsr(IEMCPU_TO_VMCPU(pIemCpu), pCtx->ecx, &uValue.u);
+    if (rc != VINF_SUCCESS)
+    {
+        AssertMsgReturn(rc == VERR_CPUM_RAISE_GP_0, ("%Rrc\n", rc), VERR_IPE_UNEXPECTED_STATUS);
+        return iemRaiseGeneralProtectionFault0(pIemCpu);
+    }
+
+    pCtx->rax = uValue.au32[0];
+    pCtx->rdx = uValue.au32[1];
 
     iemRegAddToRip(pIemCpu, cbInstr);

trunk/src/VBox/VMM/VMMAll/IEMAllInstructions.cpp.h

@@ -1110 +1110 @@
 
 /** Opcode 0x0f 0x33. */
-FNIEMOP_STUB(iemOp_rdmsr);
+FNIEMOP_DEF(iemOp_rdmsr)
+{
+    IEMOP_MNEMONIC("rdmsr");
+    IEMOP_HLP_NO_LOCK_PREFIX();
+    return IEM_MC_DEFER_TO_CIMPL_0(iemCImpl_rdmsr);
+}
+
+
 /** Opcode 0x0f 0x34. */
 FNIEMOP_STUB(iemOp_rdpmc);
@@ -3259 +3266 @@
 
 /** Opcode 0x0f 0xae. */
-FNIEMOP_STUB(iemOp_Grp15);
+FNIEMOP_STUB(iemOp_Grp15); /** @todo next up: fxrstor */