Changeset 9412 in vbox for trunk/include

Timestamp:

Jun 5, 2008 11:56:28 AM (17 years ago)

Author:

vboxsync

Message:

use macros to access base, limit of a descriptor and offset of an IDT entry

Location:

trunk/include/VBox

Files:

• types.h (modified) (1 diff)
• x86.h (modified) (2 diffs)

trunk/include/VBox/types.h

@@ -386 +386 @@
 /** @} */
 
+
+/** @def VBOXIDTE_OFFSET
+ * Return the offset of an IDT entry.
+ */
+#define VBOXIDTE_OFFSET(desc) \
+        (  ((uint32_t)((desc).Gen.u16OffsetHigh) << 16) \
+         | (           (desc).Gen.u16OffsetLow        ) )
 
 /** @defgroup grp_types_desc    Descriptor Table Entry.

trunk/include/VBox/x86.h

@@ -1893 +1893 @@
 
 
+/** @def X86DESC_BASE
+ * Return the base address of a descriptor.
+ */
+#define X86DESC_BASE(desc) \
+        (  ((uint32_t)((desc).Gen.u8BaseHigh2) << 24) \
+         | (           (desc).Gen.u8BaseHigh1  << 16) \
+         | (           (desc).Gen.u16BaseLow        ) )
+
+/** @def X86DESC_LIMIT
+ * Return the limit of a descriptor.
+ */
+#define X86DESC_LIMIT(desc) \
+        (  ((uint32_t)((desc).Gen.u4LimitHigh) << 16) \
+         | (           (desc).Gen.u16LimitLow       ) )
+
 /**
  * 64 bits generic descriptor table entry
@@ -2025 +2040 @@
 typedef X86DESC     *PX86DESCHC;
 #endif
+
+/** @def X86DESC_LIMIT
+ * Return the base of a 64-bit descriptor.
+ */
+#define X86DESC64_BASE(desc) \
+        (  ((uint64_t)((desc).Gen.u32BaseHigh3) << 32) \
+         | ((uint32_t)((desc).Gen.u8BaseHigh2)  << 24) \
+         | (           (desc).Gen.u8BaseHigh1   << 16) \
+         | (           (desc).Gen.u16BaseLow         ) )
+
 
 /** @name Selector Descriptor Types.