use builtin functions for basic operations (e.g. memcpy)

Author: stlankes

.cargo/config

@@ -1,5 +1,6 @@
 [unstable]
 build-std = ["core", "alloc"]
+build-std-features = ["compiler-builtins-mem"]
 
 [build]
 target = "x86_64-eduos.json"

src/lib.rs

@@ -25,7 +25,6 @@ pub mod console;
 pub mod consts;
 pub mod errno;
 pub mod mm;
-pub mod rlib;
 pub mod scheduler;
 pub mod synch;
 pub mod syscall;