Struct x86_64::registers::control::Cr4

pub struct Cr4;

Contains various control flags that enable architectural extensions, and indicate support for specific processor capabilities.

Implementations

impl Cr4

pub fn read() -> Cr4Flags

Read the current set of CR4 flags.

pub fn read_raw() -> u64

Read the current raw CR4 value.

pub unsafe fn write(flags: Cr4Flags)

Write CR4 flags.

Preserves the value of reserved fields.

Safety

This function is unsafe because it’s possible to violate memory safety through it, e.g. by overwriting the physical address extension flag.

pub unsafe fn write_raw(value: u64)

Write raw CR4 flags.

Does not preserve any values, including reserved fields.

Safety

This function is unsafe because it’s possible to violate memory safety through it, e.g. by overwriting the physical address extension flag.

pub unsafe fn update<F>(f: F)

where F: FnOnce(&mut Cr4Flags),

Updates CR4 flags.

Preserves the value of reserved fields.

Safety

This function is unsafe because it’s possible to violate memory safety through it, e.g. by overwriting the physical address extension flag.

Trait Implementations

impl Debug for Cr4

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.