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ParameterMemrefRead

optee_utee

Trait ParameterMemrefRead 

Source 
pub trait ParameterMemrefRead: ParameterMemref {
    // Provided methods
    fn read_to_vec(&self) -> Vec<u8> ⓘ { ... }
    fn read_at(&self, offset: usize, dest: &mut [u8]) -> Result<usize> { ... }
}
Expand description

Read-only access to a memory-reference parameter’s buffer.

Implemented by ParameterMemrefInput and ParameterMemrefInout.

read_to_vec returns a TA-owned copy that is unaffected by later REE modification; prefer validating and using the same copy.

Provided Methods§

Source

fn read_to_vec(&self) -> Vec<u8> ⓘ

Copies the shared buffer into TA-owned memory.

The allocation is sized from the host-supplied buffer_len. Callers that cannot accept an allocation of that size should bound buffer_len first, or read fixed-size fields with Self::read_at.

Source

fn read_at(&self, offset: usize, dest: &mut [u8]) -> Result<usize>

Copies bytes starting at offset into dest.

Returns the number of bytes actually read. The copy is truncated to the available bytes when offset + dest.len() exceeds the buffer length; reading exactly at the end returns Ok(0).

Returns ErrorKind::BadParameters if offset is beyond the end of the buffer.

Dyn Compatibility§

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors§