Update to 2018 edition

Author: phil-opp

Cargo.toml

@@ -8,6 +8,7 @@ license = "MIT/Apache-2.0"
 description = "An experimental pure-Rust x86 bootloader."
 repository = "https://github.com/rust-osdev/bootloader"
 publish-lockfile = true
+edition = "2018"
 
 [dependencies]
 xmas-elf = "0.6.2"

src/lib.rs

@@ -1,7 +1,5 @@
 #![no_std]
 
-extern crate x86_64;
-
 pub mod bootinfo;
 
 /// Defines the entry point function.

src/main.rs

@@ -8,14 +8,6 @@
 #![no_std]
 #![no_main]
 
-extern crate bootloader;
-extern crate usize_conversions;
-extern crate x86_64;
-extern crate xmas_elf;
-#[macro_use]
-extern crate fixedvec;
-extern crate font8x8;
-
 use bootloader::bootinfo::BootInfo;
 use core::panic::PanicInfo;
 use core::{mem, slice};
@@ -24,6 +16,7 @@ use x86_64::structures::paging::{Mapper, RecursivePageTable};
 use x86_64::structures::paging::{Page, PageTableFlags, PhysFrame, Size2MiB};
 use x86_64::ux::u9;
 use x86_64::{PhysAddr, VirtAddr};
+use fixedvec::alloc_stack;
 
 global_asm!(include_str!("stage_1.s"));
 global_asm!(include_str!("stage_2.s"));

src/page_table.rs

@@ -1,6 +1,6 @@
 use bootloader::bootinfo::MemoryRegionType;
 use fixedvec::FixedVec;
-use frame_allocator::FrameAllocator;
+use crate::frame_allocator::FrameAllocator;
 use x86_64::structures::paging::{self, MapToError, RecursivePageTable, UnmapError};
 use x86_64::structures::paging::{
     Mapper, MapperFlush, Page, PageSize, PageTableFlags, PhysFrame, Size4KiB,