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Intel architecture ia-32 User Manual

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Vol. 3A 4-21
PROTECTION
Figure 4-10.  Call-Gate Mechanism
Figure 4-11.  Privilege Check for Control Transfer with Call Gate
Offset
Segment Selector
Far Pointer to Call Gate
Required but not used by processor
Call-Gate
Descriptor
Code-Segment
Descriptor
Descriptor Table
Offset
Base
Base
Offset
Base
Segment Selector
+
Procedure
Entry Point
CPL
RPL
DPL
DPL
Privilege
Check
Call Gate (Descriptor)
Destination Code-
CS Register
Call-Gate Selector
Segment Descriptor