Namespaces
namespace	GDT
	Abstracts the GDT that, primarily, contains descriptors to memory segments.

Classes
union	GDT::SegmentDescriptor
	Describes the structure of segment descriptors. More...
struct	GDT::Pointer
	Structure that describes a GDT Pointer (aka GDT Descriptor). More...
struct	GDT::SegmentDescriptor.__unnamed0__
struct	GDT::SegmentDescriptor.__unnamed1__
	Fields specific for Code Segment (for debugging purposes). More...
struct	GDT::SegmentDescriptor.__unnamed2__
	Fields specific for Data Segment (for debugging purposes). More...

Detailed Description

Class Documentation

struct GDT::SegmentDescriptor.__unnamed0__

Class Members
uint64_t	limit_low: 16	Least-significant bits of segment size (influenced by granularity!).
uint64_t	base_low: 24	Least-significant bits of base address.
uint64_t	type: 4	Meaning of those 4 bits depends on descriptor_type below.
DescriptorType	descriptor_type: 1	Descriptor type (influences the meaning of the 3 bits above).
uint64_t	privilege_level: 2	Ring for this segment.
bool	present: 1	Entry is valid iff set to true.
uint64_t	limit_high: 4	Most-significant bits of segment size.
bool	available: 1	Bit which can be used for other purposes (in software).
uint64_t	custom: 2	Meaning of those 2 bits relate to descriptor_type and type.
Granularity	granularity: 1	Unit used as granularity for the segment limit.
uint64_t	base_high: 8	most-significant bits of base address

struct GDT::SegmentDescriptor.__unnamed1__

Fields specific for Code Segment (for debugging purposes).

Class Members
uint64_t	__pad0__: 40	Ignored (set via limit_low and base_low ).
bool	code_accessed: 1	If set, the code segment was used since the last reset of this value.
bool	readable: 1	If set, the code is readable (otherwise only executable).
bool	conforming: 1	If set, the execution of code from this segment is only allowed when running at a privilege of numerically less than or equal to privilege_level (i.e. the executor has the same or higher privileges). However, the executor's privileges remain unchanged. For nonconforming code segments (i.e., conforming is set to 0), execution is allowed only if the privileges are equal. Execution will cause a GPF in case of privilege violation.
bool	code: 1	Has to be set to true.
uint64_t	__pad1__: 9	Ignored (set via privilege_level ... available).
Size	operation_size: 2	Default address width (custom field bit).
uint64_t	__pad2__: 0	Remainder ignored (set via base_high).

struct GDT::SegmentDescriptor.__unnamed2__

Fields specific for Data Segment (for debugging purposes).

Class Members
uint64_t	__pad0__: 40	Ignored (set via limit_low and base_low).
bool	data_accessed: 1	If set, the data segment was used since the last reset of this value.
bool	writeable: 1	If set, data is writable (otherwise read only).
bool	expand_down: 1	Growing direction for dynamically growing segments.
bool	notData: 1	Has to be cleared (false).
uint64_t	__pad1__: 9	Ignored (set via privilege_level ... available).
uint64_t	reserved: 1	Reserved, always set to 0!
bool	big: 1	Size of the stack pointer (false = 16 bit, true = 32 bit). Warning Has a different meaning in case expand_down is set to 1.
uint64_t	__pad2__: 0	Remainder ignored.