Changeset 47247 in vbox for trunk/include/iprt

Timestamp:

Jul 19, 2013 10:01:36 AM (11 years ago)

Author:

vboxsync

Message:

HMVMX: preserve SS.DPL and CS.L/D/G when the 'unusable' bit is set. SS.DPL = CPL, so we absolutely must preserve that.

File:

• trunk/include/iprt/x86.h (modified) (2 diffs)

trunk/include/iprt/x86.h

@@ -2230 +2230 @@
 #ifndef VBOX_FOR_DTRACE_LIB
 /**
- * Descriptor attributes.
+ * Descriptor attributes (as seen by VT-x).
  */
 typedef struct X86DESCATTRBITS
@@ -2254 +2254 @@
      * clear byte. */
     unsigned    u1Granularity : 1;
-    /** 10 - Unusable selector, special Intel (VT-x only?) bit. */
+    /** 10 - "Unusable" selector, special Intel (VT-x only?) bit. */
     unsigned    u1Unusable : 1;
 } X86DESCATTRBITS;
 #endif /* !VBOX_FOR_DTRACE_LIB */
+
+/** @name X86DESCATTR masks
+ * @{ */
+#define X86DESCATTR_TYPE            UINT32_C(0x0000000f)
+#define X86DESCATTR_DT              UINT32_C(0x00000010)
+#define X86DESCATTR_DPL             UINT32_C(0x00000060)
+#define X86DESCATTR_P               UINT32_C(0x00000800)
+#define X86DESCATTR_LIMIT_HIGH      UINT32_C(0x00000f00)
+#define X86DESCATTR_AVL             UINT32_C(0x00001000)
+#define X86DESCATTR_L               UINT32_C(0x00002000)
+#define X86DESCATTR_D               UINT32_C(0x00004000)
+#define X86DESCATTR_G               UINT32_C(0x00008000)
+#define X86DESCATTR_UNUSABLE        UINT32_C(0x00010000)
+/** @}  */
 
 #pragma pack(1)