Function sys_mprotect 

#[unsafe(no_mangle)]
pub extern "C" fn sys_mprotect(
    ptr: *mut u8,
    size: usize,
    prot_flags: MemoryProtection,
) -> i32

Available on crate feature mman only.

Configures the protections associated with a region of virtual memory starting at ptr and going to size.

Returns 0 on success and an error code on failure.