kernel::uaccess

Struct UserPtr

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pub struct UserPtr(/* private fields */);
Expand description

A pointer into userspace.

This is the Rust equivalent to C pointers tagged with __user.

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impl UserPtr

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pub fn from_addr(addr: usize) -> Self

Create a UserPtr from an integer representing the userspace address.

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pub fn from_ptr(addr: *mut c_void) -> Self

Create a UserPtr from a pointer representing the userspace address.

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pub fn as_const_ptr(self) -> *const c_void

Cast this userspace pointer to a raw const void pointer.

It is up to the caller to use the returned pointer correctly.

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pub fn as_mut_ptr(self) -> *mut c_void

Cast this userspace pointer to a raw mutable void pointer.

It is up to the caller to use the returned pointer correctly.

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pub fn wrapping_byte_add(self, add: usize) -> UserPtr

Increment this user pointer by add bytes.

This addition is wrapping, so wrapping around the address space does not result in a panic even if CONFIG_RUST_OVERFLOW_CHECKS is enabled.

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impl Clone for UserPtr

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fn clone(&self) -> UserPtr

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Copy for UserPtr

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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,

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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,

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

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Init<T> for T

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unsafe fn __init(self, slot: *mut T) -> Result<(), Infallible>

Initializes slot. Read more
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fn chain<F>(self, f: F) -> ChainInit<Self, F, T, E>
where F: FnOnce(&mut T) -> Result<(), E>,

First initializes the value using self then calls the function f with the initialized value. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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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> PinInit<T> for T

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unsafe fn __pinned_init(self, slot: *mut T) -> Result<(), Infallible>

Initializes slot. Read more
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fn pin_chain<F>(self, f: F) -> ChainPinInit<Self, F, T, E>
where F: FnOnce(Pin<&mut T>) -> Result<(), E>,

First initializes the value using self then calls the function f with the initialized value. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.