gdt.h File Reference

Defines a Global Descriptor Table (GDT) for setting up memory segments in protected mode. More...

#include <cstdint>
#include <common/macros.h>
#include <system/multiboot.h>

Go to the source code of this file.

Classes
struct	MaxOS::system::GDTRegister
	How the CPU stores the GDT. More...
class	MaxOS::system::GlobalDescriptorTable
	Sets up the GDT in the CPU. More...

Typedefs
typedef struct PACKED MaxOS::system::GDTRegister	MaxOS::system::gdtr_t
	Alias for GDTRegister struct.

Enumerations
enum class	MaxOS::system::DescriptorFlags : uint64_t {   Write = (1ULL << 41) , Execute = (1ULL << 43) , CodeOrDataSegment = (1ULL << 44) , GrowDown = (1ULL << 45) ,   ConformFromLower = (1ULL << 46) , Present = (1ULL << 47) , LongMode = (1ULL << 53) }
	Flags for the GDT entries. More...

Detailed Description

Defines a Global Descriptor Table (GDT) for setting up memory segments in protected mode.

Date

3rd October 2022

Author

Max Tyson

Definition in file gdt.h.

Enumeration Type Documentation

DescriptorFlags

enum class MaxOS::system::DescriptorFlags : uint64_t

strong

Flags for the GDT entries.

DescriptorFlags

Definition at line 24 of file gdt.h.

                               : uint64_t {
        Write = (1ULL << 41),
        Execute = (1ULL << 43),
        CodeOrDataSegment = (1ULL << 44),
        GrowDown = (1ULL << 45),
        ConformFromLower = (1ULL << 46),
        Present = (1ULL << 47),
        LongMode = (1ULL << 53),
    };