Merge branch 'post-10' into post-11

.cargo/config.toml

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

Cargo.lock

@@ -21,7 +21,6 @@ dependencies = [
  "linked_list_allocator",
  "pc-keyboard",
  "pic8259_simple",
- "rlibc",
  "spin",
  "uart_16550",
  "volatile",
@@ -82,12 +81,6 @@ dependencies = [
  "cpuio",
 ]
 
-[[package]]
-name = "rlibc"
-version = "1.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fc874b127765f014d792f16763a81245ab80500e2ad921ed4ee9e82481ee08fe"
-
 [[package]]
 name = "scopeguard"
 version = "1.1.0"

Cargo.toml

@@ -14,7 +14,6 @@ harness = false
 
 [dependencies]
 bootloader = { version = "0.9.8", features = ["map_physical_memory"]}
-rlibc = "1.0.0"
 volatile = "0.2.6"
 spin = "0.5.2"
 x86_64 = "0.12.1"

src/lib.rs

@@ -9,8 +9,6 @@
 #![reexport_test_harness_main = "test_main"]
 
 extern crate alloc;
-extern crate rlibc;
-
 use core::panic::PanicInfo;
 
 pub mod allocator;