Changeset 14257 in vbox for trunk/src/VBox/VMM

Timestamp:

Nov 17, 2008 3:46:29 PM (16 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

39419

Message:

cpuid clears the high dwords of the 64 bits registers.

File:

• trunk/src/VBox/VMM/VMMAll/EMAll.cpp (modified) (1 diff)

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

@@ -1898 +1898 @@
 VMMDECL(int) EMInterpretCpuId(PVM pVM, PCPUMCTXCORE pRegFrame)
 {
-    uint32_t iLeaf = pRegFrame->eax; NOREF(iLeaf);
+    uint32_t iLeaf = pRegFrame->eax;
+
+    /* cpuid clears the high dwords of the affected 64 bits registers. */
+    pRegFrame->rax = 0;
+    pRegFrame->rbx = 0;
+    pRegFrame->rcx = 0;
+    pRegFrame->rdx = 0;
 
     /* Note: operates the same in 64 and non-64 bits mode. */
-    CPUMGetGuestCpuId(pVM, pRegFrame->eax, &pRegFrame->eax, &pRegFrame->ebx, &pRegFrame->ecx, &pRegFrame->edx);
+    CPUMGetGuestCpuId(pVM, iLeaf, &pRegFrame->eax, &pRegFrame->ebx, &pRegFrame->ecx, &pRegFrame->edx);
     Log(("Emulate: CPUID %x -> %08x %08x %08x %08x\n", iLeaf, pRegFrame->eax, pRegFrame->ebx, pRegFrame->ecx, pRegFrame->edx));
     return VINF_SUCCESS;