add x86_64 and aarch64 modules

Phase 2 of code reorganization: separate x86_64 from aarch64
functionality in modules.

Signed-off-by: Alexandra Iordache <aghecen@amazon.com>

Author: Alexandra Iordache

coverage_config_aarch64.json

@@ -1,5 +1,5 @@
 {
-  "coverage_score": 70.9,
+  "coverage_score": 74.1,
   "exclude_path": "",
   "crate_features": ""
 }

coverage_config_x86_64.json

@@ -1,5 +1,5 @@
 {
-  "coverage_score": 76.3,
+  "coverage_score": 74,
   "exclude_path": "",
   "crate_features": ""
 }

src/loader/aarch64/mod.rs

@@ -0,0 +1,12 @@
+// Copyright (c) 2019 Intel Corporation. All rights reserved.
+// Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+//
+// Copyright 2017 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE-BSD-3-Clause file.
+//
+// SPDX-License-Identifier: Apache-2.0 AND BSD-3-Clause
+
+//! Traits and structs for loading `aarch64` kernels into guest memory.
+
+#![cfg(target_arch = "aarch64")]

src/loader/mod.rs

@@ -9,7 +9,7 @@
 //
 // SPDX-License-Identifier: Apache-2.0 AND BSD-3-Clause
 
-//! Traits and Structs
+//! Traits and Structs for loading kernels into guest memory.
 //! - [KernelLoader](trait.KernelLoader.html): load kernel image into guest memory
 //! - [KernelLoaderResult](struct.KernelLoaderResult.html): the structure which loader
 //! returns to VMM to assist zero page construction and boot environment setup
@@ -33,23 +33,24 @@ use vm_memory::{Address, Bytes, GuestAddress, GuestMemory, GuestUsize};
 #[cfg_attr(feature = "cargo-clippy", allow(clippy::all))]
 pub mod bootparam;
 
-#[cfg(all(feature = "elf", any(target_arch = "x86", target_arch = "x86_64")))]
-pub mod elf;
-
-#[cfg(all(feature = "bzimage", any(target_arch = "x86", target_arch = "x86_64")))]
-pub mod bzimage;
-
+#[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
 mod struct_util;
 
-#[cfg(all(feature = "elf", any(target_arch = "x86", target_arch = "x86_64")))]
-pub use elf::Elf;
-#[cfg(all(feature = "elf", any(target_arch = "x86", target_arch = "x86_64")))]
-pub use elf::Error as ElfError;
+#[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
+mod x86_64;
+
+#[cfg(target_arch = "aarch64")]
+mod aarch64;
 
 #[cfg(all(feature = "bzimage", any(target_arch = "x86", target_arch = "x86_64")))]
-pub use bzimage::BzImage;
+pub use x86_64::bzimage::BzImage;
 #[cfg(all(feature = "bzimage", any(target_arch = "x86", target_arch = "x86_64")))]
-pub use bzimage::Error as BzImageError;
+pub use x86_64::bzimage::Error as BzImageError;
+
+#[cfg(all(feature = "elf", any(target_arch = "x86", target_arch = "x86_64")))]
+pub use x86_64::elf::Elf;
+#[cfg(all(feature = "elf", any(target_arch = "x86", target_arch = "x86_64")))]
+pub use x86_64::elf::Error as ElfError;
 
 #[derive(Debug, PartialEq)]
 /// Kernel loader errors.

src/loader/bzimage/mod.rs renamed to src/loader/x86_64/bzimage/mod.rs

@@ -17,7 +17,7 @@ use std::io::{Read, Seek, SeekFrom};
 
 use vm_memory::{Address, Bytes, GuestAddress, GuestMemory, GuestUsize};
 
-use super::{
+use super::super::{
     bootparam, struct_util, Error as KernelLoaderError, KernelLoader, KernelLoaderResult, Result,
 };
 

src/loader/elf/elf.rs renamed to src/loader/x86_64/elf/elf.rs

@@ -18,7 +18,9 @@ use std::mem;
 
 use vm_memory::{Address, Bytes, GuestAddress, GuestMemory, GuestUsize};
 
-use super::{struct_util, Error as KernelLoaderError, KernelLoader, KernelLoaderResult, Result};
+use super::super::{
+    struct_util, Error as KernelLoaderError, KernelLoader, KernelLoaderResult, Result,
+};
 
 #[allow(dead_code)]
 #[allow(non_camel_case_types)]
@@ -178,7 +180,7 @@ impl KernelLoader for Elf {
 
         if let Some(addr) = highmem_start_address {
             if (ehdr.e_entry as u64) < addr.raw_value() {
-                Err(Error::InvalidEntryAddress)?;
+                return Err(Error::InvalidEntryAddress.into());
             }
         }
 
@@ -300,7 +302,7 @@ where
     // The PVH entry point is a 32-bit address, so the descriptor field
     // must be capable of storing all such addresses.
     if (nhdr.n_descsz as usize) < mem::size_of::<u32>() {
-        Err(Error::InvalidPvhNote)?;
+        return Err(Error::InvalidPvhNote.into());
     }
 
     let mut pvh_addr_bytes = [0; mem::size_of::<u32>()];

src/loader/elf/mod.rs renamed to src/loader/x86_64/elf/mod.rs

@@ -0,0 +1,18 @@
+// Copyright (c) 2019 Intel Corporation. All rights reserved.
+// Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+//
+// Copyright 2017 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE-BSD-3-Clause file.
+//
+// SPDX-License-Identifier: Apache-2.0 AND BSD-3-Clause
+
+//! Traits and structs for loading `x86_64` kernels into guest memory.
+
+#![cfg(any(target_arch = "x86", target_arch = "x86_64"))]
+
+#[cfg(feature = "elf")]
+pub mod elf;
+
+#[cfg(feature = "bzimage")]
+pub mod bzimage;