register.h File Reference

#include <stdint.h>

Include dependency graph for register.h:

Macros
#define	IA32_EFER   0xC0000080
#define	IA32_STAR   0xC0000081
	System Call Target Address.
#define	IA32_LSTAR   0xC0000082
	IA-32e Mode System Call Target Address.
#define	IA32_SFMASK   0xC0000084
	System Call Flag Mask.

Functions
uint64_t	read_cr0 ()
uint64_t	read_cr2 ()
uint64_t	read_cr3 ()
uint64_t	read_cr4 ()
void	write_cr0 (uint64_t value)
void	write_cr3 (uint64_t value)
void	write_cr4 (uint64_t value)
uint64_t	read_msr (uint64_t msr)
void	write_msr (uint64_t msr, uint64_t value)
uint64_t	read_rsp ()

Macro Definition Documentation

IA32_EFER

#define IA32_EFER   0xC0000080

Extended Feature Enables

See also

https://wiki.osdev.org/CPU_Registers_x86-64#IA32_EFER

Function Documentation

read_cr0()

uint64_t read_cr0

(

)

Returns the value of the CR0 register.

Returns

the address contained in the CR0 register

read_cr2()

uint64_t read_cr2

(

)

Returns the value of the CR2 register.

Returns

the address contained in the CR2 register

read_cr3()

uint64_t read_cr3

(

)

Returns the value of the CR3 register.

Returns

the address contained in the CR3 register

read_cr4()

uint64_t read_cr4

(

)

Returns the value of the CR4 register.

Returns

the address contained in the CR4 register

read_msr()

uint64_t read_msr

(

uint64_t

msr

)

Read a Model Specific Register.

See also

https://wiki.osdev.org/Model_Specific_Registers

Returns

the value for the specified register

read_rsp()

uint64_t read_rsp

(

)

Returns the value of the RSP register (stack pointer).

Returns

the address contained in the RSP register

write_cr0()

void write_cr0

(

uint64_t

value

)

Updates the value of the CR0 register.

Parameters

value

the new value for the CR0 register

write_cr3()

void write_cr3

(

uint64_t

value

)

Updates the value of the CR3 register.

Parameters

value

the new value for the CR3 register

write_cr4()

void write_cr4

(

uint64_t

value

)

Updates the value of the CR4 register.

Parameters

value

the new value for the CR4 register

write_msr()

void write_msr	(	uint64_t	msr,
		uint64_t	value )

Updates the value of the given Model Specific Register.

See also

https://wiki.osdev.org/Model_Specific_Registers

Parameters

msr	the model specific register number
value	the new value