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X86-modes

Modes of operation of the processor.

For now we do not model in detail all the processor modes and transitions (see Figure 2-3 in Intel Volume 3A). We implicitly assume that the processor is always in one of the following modes:

• Protected mode.
• Compatibility mode (sub-mode of IA-32e mode).
• 64-bit mode (sub-mode of IA-32e mode).

No real-address mode, virtual-8086 mode, or system management mode for now.

Subtopics

64-bit-modep

Check whether we are in 64-bit mode.

X86-operation-mode

Returns the current mode of operation of the x86 machine