Changeset 465 in vbox for trunk/src

Timestamp:

Jan 31, 2007 3:05:57 PM (18 years ago)

Author:

vboxsync

Message:

Added code to emulate rdtsc in the guest context. (disabled)

Location:

trunk/src/VBox/VMM

Files:

• CPUM.cpp (modified) (1 diff)
• VMMGC/TRPMGCHandlers.cpp (modified) (1 diff)

trunk/src/VBox/VMM/CPUM.cpp

@@ -133 +133 @@
         pVM->cpum.s.CR4.OrMask  = X86_CR4_OSFSXR;
     }
+
+#ifdef CPUM_TRAP_RDTSC
+    pVM->cpum.s.CR4.OrMask |= X86_CR4_TSD;
+#endif
 
     if (!pVM->cpum.s.CPUFeatures.edx.u1MMX)

trunk/src/VBox/VMM/VMMGC/TRPMGCHandlers.cpp

@@ -572 +572 @@
             return trpmGCExitTrap(pVM, rc, pRegFrame);
         }
+
+        case OP_RDTSC:
+        {
+            unsigned uCR4 = CPUMGetGuestCR4(pVM);
+
+            if (uCR4 & X86_CR4_TSD)
+                break; /* genuine #GP */
+
+            uint64_t uTicks = TMCpuTickGet(pVM);
+
+            pRegFrame->eax = uTicks;
+            pRegFrame->edx = (uTicks >> 32ULL);
+
+            pRegFrame->eip += pCpu->opsize;
+            return trpmGCExitTrap(pVM, VINF_SUCCESS, pRegFrame);
+        }
     }