Struct vm_memory::guest_memory::GuestAddress

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pub struct GuestAddress(pub u64);

Expand description

Represents a guest physical address (GPA).

Notes:

On ARM64, a 32-bit hypervisor may be used to support a 64-bit guest. For simplicity, u64 is used to store the the raw value no matter if the guest a 32-bit or 64-bit virtual machine.

Tuple Fields

0: u64

Trait Implementations

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impl Address for GuestAddress

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fn new(value: u64) -> GuestAddress

Creates an address from a raw address value.

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fn raw_value(&self) -> u64

Returns the raw value of the address.

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fn checked_offset_from(&self, base: GuestAddress) -> Option<u64>

Computes the offset from this address to the given base address. Read more

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fn checked_add(&self, other: u64) -> Option<GuestAddress>

Computes self + other, returning None if overflow occurred.

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fn overflowing_add(&self, other: u64) -> (GuestAddress, bool)

Computes self + other. Read more

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fn unchecked_add(&self, offset: u64) -> GuestAddress

Computes self + offset. Read more

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fn checked_sub(&self, other: u64) -> Option<GuestAddress>

Subtracts two addresses, checking for underflow. If underflow happens, None is returned.

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fn overflowing_sub(&self, other: u64) -> (GuestAddress, bool)

Computes self - other. Read more

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fn unchecked_sub(&self, other: u64) -> GuestAddress

Computes self - other. Read more

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fn mask(&self, mask: Self::V) -> Self::V

Returns the bitwise and of the address with the given mask.

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fn unchecked_offset_from(&self, base: Self) -> Self::V

Computes the offset from this address to the given base address. Read more

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fn checked_align_up(&self, power_of_two: Self::V) -> Option<Self>

Returns self, aligned to the given power of two.

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fn unchecked_align_up(&self, power_of_two: Self::V) -> Self

Returns self, aligned to the given power of two. Only use this when the result is guaranteed not to overflow. Read more

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impl AddressValue for GuestAddress

type V = u64

Type of the raw address value.

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fn zero() -> Self::V

Return the value zero, coerced into the value type Self::V

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fn one() -> Self::V

Return the value zero, coerced into the value type Self::V

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impl BitAnd<u64> for GuestAddress

type Output = GuestAddress

The resulting type after applying the & operator.

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fn bitand(self, other: u64) -> GuestAddress

Performs the & operation. Read more

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impl BitOr<u64> for GuestAddress

type Output = GuestAddress

The resulting type after applying the | operator.

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fn bitor(self, other: u64) -> GuestAddress

Performs the | operation. Read more

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impl Clone for GuestAddress

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fn clone(&self) -> GuestAddress

Returns a copy of the value. Read more

1.0.0 · source

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

Performs copy-assignment from source. Read more

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impl Debug for GuestAddress

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

Formats the value using the given formatter. Read more

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impl Default for GuestAddress

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fn default() -> GuestAddress

Returns the “default value” for a type. Read more

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impl Ord for GuestAddress

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

This method returns an Ordering between self and other. Read more

1.21.0 · source

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

Compares and returns the maximum of two values. Read more

1.21.0 · source

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

Compares and returns the minimum of two values. Read more

1.50.0 · source

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

Restrict a value to a certain interval. Read more

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impl PartialEq<GuestAddress> for GuestAddress

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

This method tests for self and other values to be equal, and is used by ==. Read more

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

This method tests for !=.

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impl PartialOrd<GuestAddress> for GuestAddress

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

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

1.0.0 · source

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

This method tests less than (for self and other) and is used by the < operator. Read more

1.0.0 · source

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

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more

1.0.0 · source

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

This method tests greater than (for self and other) and is used by the > operator. Read more

1.0.0 · source

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

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more

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impl StructuralPartialEq for GuestAddress

Auto Trait Implementations

impl RefUnwindSafe for GuestAddress

impl Send for GuestAddress

impl Sync for GuestAddress

impl Unpin for GuestAddress

impl UnwindSafe for GuestAddress

Blanket Implementations

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impl<T> Any for T where
T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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impl<T> Bytes<GuestAddress> for T where
T: GuestMemory + ?Sized,

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fn write_slice(&self, buf: &[u8], addr: GuestAddress) -> Result<(), Error>

Examples

Write a slice at guestaddress 0x1000. (uses the backend-mmap feature)

gm.write_slice(&[1, 2, 3, 4, 5], start_addr)
    .expect("Could not write slice to guest memory");

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fn read_slice(&self, buf: &mut [u8], addr: GuestAddress) -> Result<(), Error>

Examples

Read a slice of length 16 at guestaddress 0x1000. (uses the backend-mmap feature)

let start_addr = GuestAddress(0x1000);
let mut gm = GuestMemoryMmap::<()>::from_ranges(&vec![(start_addr, 0x400)])
    .expect("Could not create guest memory");
let buf = &mut [0u8; 16];

gm.read_slice(buf, start_addr)
    .expect("Could not read slice from guest memory");

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fn read_from<F>(
 &self,
 addr: GuestAddress,
 src: &mut F,
 count: usize
) -> Result<usize, Error> where
 F: Read,

Examples

Read bytes from /dev/urandom (uses the backend-mmap feature)

let mut file = File::open(Path::new("/dev/urandom")).expect("Could not open /dev/urandom");

gm.read_from(addr, &mut file, 128)
    .expect("Could not read from /dev/urandom into guest memory");

let read_addr = addr.checked_add(8).expect("Could not compute read address");
let rand_val: u32 = gm
    .read_obj(read_addr)
    .expect("Could not read u32 val from /dev/urandom");

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fn write_to<F>(
 &self,
 addr: GuestAddress,
 dst: &mut F,
 count: usize
) -> Result<usize, Error> where
 F: Write,

Examples

Write 128 bytes to /dev/null (uses the backend-mmap feature)

let mut file = OpenOptions::new()
    .write(true)
    .open("/dev/null")
    .expect("Could not open /dev/null");

gm.write_to(start_addr, &mut file, 128)
    .expect("Could not write 128 bytes to the provided address");

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fn write_all_to<F>(
 &self,
 addr: GuestAddress,
 dst: &mut F,
 count: usize
) -> Result<(), Error> where
 F: Write,

Examples

Write 128 bytes to /dev/null (uses the backend-mmap feature)

let mut file = OpenOptions::new()
    .write(true)
    .open("/dev/null")
    .expect("Could not open /dev/null");

gm.write_all_to(start_addr, &mut file, 128)
    .expect("Could not write 128 bytes to the provided address");

type E = Error

Associated error codes

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fn write(&self, buf: &[u8], addr: GuestAddress) -> Result<usize, Error>

Writes a slice into the container at addr. Read more

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fn read(&self, buf: &mut [u8], addr: GuestAddress) -> Result<usize, Error>

Reads data from the container at addr into a slice. Read more

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fn read_exact_from<F>(
 &self,
 addr: GuestAddress,
 src: &mut F,
 count: usize
) -> Result<(), Error> where
 F: Read,

Reads exactly count bytes from an object and writes them into the container at addr. Read more

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fn store<O>(
 &self,
 val: O,
 addr: GuestAddress,
 order: Ordering
) -> Result<(), Error> where
 O: AtomicAccess,

Atomically store a value at the specified address.

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fn load<O>(&self, addr: GuestAddress, order: Ordering) -> Result<O, Error> where
O: AtomicAccess,

Atomically load a value from the specified address.

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fn write_obj<T: ByteValued>(&self, val: T, addr: A) -> Result<(), Self::E>

Writes an object into the container at addr. Read more

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fn read_obj<T: ByteValued>(&self, addr: A) -> Result<T, Self::E>

Reads an object from the container at addr. Read more

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impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into for T where
U: From<T>,

const: unstable · source

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for T where
T: Clone,

type Owned = T

The resulting type after obtaining ownership.

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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more

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impl<T, U> TryFrom for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>

Performs the conversion.

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impl<T, U> TryInto for T where
U: TryFrom<T>,

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, >::Error>

Performs the conversion.

Struct vm_memory::guest_memory::GuestAddress

Tuple Fields

Trait Implementations

impl Address for GuestAddress

fn new(value: u64) -> GuestAddress

fn raw_value(&self) -> u64

fn checked_offset_from(&self, base: GuestAddress) -> Option<u64>

fn checked_add(&self, other: u64) -> Option<GuestAddress>

fn overflowing_add(&self, other: u64) -> (GuestAddress, bool)

fn unchecked_add(&self, offset: u64) -> GuestAddress

fn checked_sub(&self, other: u64) -> Option<GuestAddress>

fn overflowing_sub(&self, other: u64) -> (GuestAddress, bool)

fn unchecked_sub(&self, other: u64) -> GuestAddress

fn mask(&self, mask: Self::V) -> Self::V

fn unchecked_offset_from(&self, base: Self) -> Self::V

fn checked_align_up(&self, power_of_two: Self::V) -> Option<Self>

fn unchecked_align_up(&self, power_of_two: Self::V) -> Self

impl AddressValue for GuestAddress

type V = u64

fn zero() -> Self::V

fn one() -> Self::V

impl BitAnd<u64> for GuestAddress

type Output = GuestAddress

fn bitand(self, other: u64) -> GuestAddress

impl BitOr<u64> for GuestAddress

type Output = GuestAddress

fn bitor(self, other: u64) -> GuestAddress

impl Clone for GuestAddress

fn clone(&self) -> GuestAddress

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

impl Debug for GuestAddress

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

impl Default for GuestAddress

fn default() -> GuestAddress

impl Ord for GuestAddress

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

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

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

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

impl PartialEq<GuestAddress> for GuestAddress

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

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

impl PartialOrd<GuestAddress> for GuestAddress

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

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

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

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

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

impl Copy for GuestAddress

impl Eq for GuestAddress

impl StructuralEq for GuestAddress

impl StructuralPartialEq for GuestAddress

Auto Trait Implementations

impl RefUnwindSafe for GuestAddress

impl Send for GuestAddress

impl Sync for GuestAddress

impl Unpin for GuestAddress

impl UnwindSafe for GuestAddress

Blanket Implementations

impl<T> Any for T where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for T where T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for T where T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

impl<T> Bytes<GuestAddress> for T where T: GuestMemory + ?Sized,

fn write_slice(&self, buf: &[u8], addr: GuestAddress) -> Result<(), Error>

fn read_slice(&self, buf: &mut [u8], addr: GuestAddress) -> Result<(), Error>

fn read_from<F>( &self, addr: GuestAddress, src: &mut F, count: usize) -> Result<usize, Error> where F: Read,

fn write_to<F>( &self, addr: GuestAddress, dst: &mut F, count: usize) -> Result<usize, Error> where F: Write,

fn write_all_to<F>( &self, addr: GuestAddress, dst: &mut F, count: usize) -> Result<(), Error> where F: Write,

type E = Error

fn write(&self, buf: &[u8], addr: GuestAddress) -> Result<usize, Error>

fn read(&self, buf: &mut [u8], addr: GuestAddress) -> Result<usize, Error>

fn read_exact_from<F>( &self, addr: GuestAddress, src: &mut F, count: usize) -> Result<(), Error> where F: Read,

fn store<O>( &self, val: O, addr: GuestAddress, order: Ordering) -> Result<(), Error> where O: AtomicAccess,

fn load<O>(&self, addr: GuestAddress, order: Ordering) -> Result<O, Error> where O: AtomicAccess,

fn write_obj<T: ByteValued>(&self, val: T, addr: A) -> Result<(), Self::E>

fn read_obj<T: ByteValued>(&self, addr: A) -> Result<T, Self::E>

impl<T> From<T> for T

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

impl<T> Any for T where
T: 'static + ?Sized,

impl<T> Borrow<T> for T where
T: ?Sized,

impl<T> BorrowMut<T> for T where
T: ?Sized,

impl<T> Bytes<GuestAddress> for T where
T: GuestMemory + ?Sized,

fn read_from<F>(
&self,
addr: GuestAddress,
src: &mut F,
count: usize
) -> Result<usize, Error> where
F: Read,

fn write_to<F>(
&self,
addr: GuestAddress,
dst: &mut F,
count: usize
) -> Result<usize, Error> where
F: Write,

fn write_all_to<F>(
&self,
addr: GuestAddress,
dst: &mut F,
count: usize
) -> Result<(), Error> where
F: Write,

fn read_exact_from<F>(
&self,
addr: GuestAddress,
src: &mut F,
count: usize
) -> Result<(), Error> where
F: Read,

fn store<O>(
&self,
val: O,
addr: GuestAddress,
order: Ordering
) -> Result<(), Error> where
O: AtomicAccess,

fn load<O>(&self, addr: GuestAddress, order: Ordering) -> Result<O, Error> where
O: AtomicAccess,

impl<T, U> Into<U> for T where
U: From<T>,

impl<T> ToOwned for T where
T: Clone,

impl<T, U> TryFrom<U> for T where
U: Into<T>,

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,