impl Clone for various types, impl Eq for Port (#43)

Author: strake

src/instructions/port.rs

@@ -63,7 +63,7 @@ impl PortReadWrite for u32 {
 }
 
 /// An I/O port.
-#[derive(Debug)]
+#[derive(Debug, Clone, PartialEq, Eq)]
 pub struct Port<T: PortReadWrite> {
     port: u16,
     phantom: PhantomData<T>,

src/structures/gdt.rs

@@ -50,7 +50,7 @@ impl fmt::Debug for SegmentSelector {
 /// switching between user and kernel mode or for loading a TSS.
 ///
 /// The GDT has a fixed size of 8 entries, trying to add more entries will panic.
-#[derive(Debug)]
+#[derive(Debug, Clone)]
 pub struct GlobalDescriptorTable {
     table: [u64; 8],
     next_free: usize,
@@ -109,7 +109,7 @@ impl GlobalDescriptorTable {
 ///
 /// Segmentation is no longer supported in 64-bit mode, so most of the descriptor
 /// contents are ignored.
-#[derive(Debug)]
+#[derive(Debug, Clone)]
 pub enum Descriptor {
     /// Descriptor for a code or data segment.
     ///

src/structures/idt.rs

@@ -31,6 +31,7 @@ use {PrivilegeLevel, VirtAddr};
 /// [AMD64 manual volume 2](https://support.amd.com/TechDocs/24593.pdf)
 /// (with slight modifications).
 #[allow(missing_debug_implementations)]
+#[derive(Clone)]
 #[repr(C)]
 pub struct InterruptDescriptorTable {
     /// A divide by zero exception (`#DE`) occurs when the denominator of a DIV instruction or
@@ -637,6 +638,7 @@ impl EntryOptions {
 }
 
 /// Represents the exception stack frame pushed by the CPU on exception entry.
+#[derive(Clone)]
 #[repr(C)]
 pub struct ExceptionStackFrame {
     /// This value points to the instruction that should be executed when the interrupt