Module user 

Available on crate feature uspace only.

User execution and nofault memory access.

Structs

ExceptionInfo

Information about an exception that occurred in user space.

ExceptionSyndrome

Architecture-neutral syndrome fields for user-space exceptions.

UserContext

Context to enter user space.

Enums

ExceptionKind

A generalized kind for ExceptionInfo.

ReturnReason

A reason as to why the control of the CPU is returned from the user space to the kernel.

UserAccessError

Failure returned by a nofault user read.

UserAccessType

Direction of an architecture-level user-memory access check.

UserAtomicError

Failure returned by a nofault user atomic operation.

UserAtomicU32Op

Atomic operation supported by user_atomic_u32.

Traits

NoUninit

Marker trait for “plain old data” types with no uninit (or padding) bytes.

Functions

user_access_ok_page^⚠

Lock-free EL0/user access probe. No hardware address-translation probe is wired up on this architecture yet, so always report a present-page probe miss and let the caller take the locked slow path (correctness preserved).

user_atomic_u32^⚠

Atomically updates one aligned user-space word without resolving faults.

user_cmpxchg_u32^⚠

Compares and conditionally replaces one aligned user word without faulting in pages.

user_copy^⚠

Copies data from source to destination, where addresses may be in user space. Equivalent to memcpy.

user_read_u32^⚠

Reads one aligned user-space word without resolving faults.