Changeset 31512 in vbox for trunk

Timestamp:

Aug 10, 2010 9:06:28 AM (14 years ago)

Author:

vboxsync

Message:

CPUMGetGuestCPL: Don't trust ssHid.Attr.n.u2Dpl to hold the CPL when we're in V8086 mode (REM).

File:

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

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

@@ -2312 +2312 @@
          */
         if (RT_LIKELY(pVCpu->cpum.s.Guest.cr0 & X86_CR0_PE))
-            cpl = pCtxCore->ssHid.Attr.n.u2Dpl;
+        {
+            if (!pCtxCore->eflags.Bits.u1VM)
+                cpl = pCtxCore->ssHid.Attr.n.u2Dpl;
+            else
+                cpl = 3; /* REM doesn't set DPL=3 in V8086 mode. See #5130. */
+        }
         else
             cpl = 0;  /* CPL set to 3 for VT-x real-mode emulation. */