Struct MemoryRegion 

pub struct MemoryRegion {
    pub host_addr: u64,
    pub vm_addr: u64,
    pub len: u64,
    pub vm_gap_shift: u8,
    pub is_writable: bool,
}

Memory region for bounds checking and address translation

Fields

host_addr: u64

start host address

vm_addr: u64

start virtual address

len: u64

Length in bytes

vm_gap_shift: u8

Size of regular gaps as bit shift (63 means this region is continuous)

is_writable: bool

Is also writable (otherwise it is readonly)

Implementations

impl MemoryRegion

pub fn new_from_slice( slice: &[u8], vm_addr: u64, vm_gap_size: u64, is_writable: bool, ) -> Self

Creates a new MemoryRegion structure from a slice

pub fn vm_to_host<E: UserDefinedError>( &self, vm_addr: u64, len: u64, ) -> Result<u64, EbpfError<E>>

Convert a virtual machine address into a host address Does not perform a lower bounds check, as that is already done by the binary search in MemoryMapping::map()

Trait Implementations

impl Clone for MemoryRegion

fn clone(&self) -> MemoryRegion

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for MemoryRegion

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

Formats the value using the given formatter.

impl Default for MemoryRegion

fn default() -> MemoryRegion

Returns the “default value” for a type.

impl Eq for MemoryRegion

impl Ord for MemoryRegion

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for MemoryRegion

fn eq(&self, other: &MemoryRegion) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl PartialOrd for MemoryRegion

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for MemoryRegion