Changeset 9574 in vbox

Timestamp:

Jun 10, 2008 3:19:00 PM (17 years ago)

Author:

vboxsync

Message:

Mask away invalid parts of the cpu context in CPUMSetGuestCtxCore.

File:

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

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

@@ -393 +393 @@
     /** @todo #1410 requires selectors to be checked. */
 
-    PCPUMCTXCORE pCtxCoreDst CPUMCTX2CORE(&pVM->cpum.s.Guest);
+    PCPUMCTXCORE pCtxCoreDst = CPUMCTX2CORE(&pVM->cpum.s.Guest);
     *pCtxCoreDst = *pCtxCore;
+
+    /* Mask away invalid parts of the cpu context. */
+    if (CPUMGetGuestMode(pVM) != CPUMMODE_LONG)
+    {
+        uint64_t u64Mask = UINT64_C(0xffffffff);
+
+        pCtxCoreDst->rip        &= u64Mask;
+        pCtxCoreDst->rax        &= u64Mask;
+        pCtxCoreDst->rbx        &= u64Mask;
+        pCtxCoreDst->rcx        &= u64Mask;
+        pCtxCoreDst->rdx        &= u64Mask;
+        pCtxCoreDst->rsi        &= u64Mask;
+        pCtxCoreDst->rdi        &= u64Mask;
+        pCtxCoreDst->rbp        &= u64Mask;
+        pCtxCoreDst->rsp        &= u64Mask;
+        pCtxCoreDst->rflags.u   &= u64Mask;
+
+        pCtxCoreDst->r8         = 0;
+        pCtxCoreDst->r9         = 0;
+        pCtxCoreDst->r10        = 0;
+        pCtxCoreDst->r11        = 0;
+        pCtxCoreDst->r12        = 0;
+        pCtxCoreDst->r13        = 0;
+        pCtxCoreDst->r14        = 0;
+        pCtxCoreDst->r15        = 0;
+    }
 }