Merge pull request #23 from jmi2k/elf32

Add support for ELF32 format

Cargo.toml

@@ -8,3 +8,6 @@ description = "An experimental Multiboot 2 crate for ELF-64 kernels."
 [dependencies.bitflags]
 version = "0.4.0"
 features = ["no_std"]
+
+[features]
+elf32 = []

src/elf_sections.rs

@@ -77,6 +77,23 @@ impl Iterator for ElfSectionIter {
     }
 }
 
+#[cfg(feature = "elf32")]
+#[derive(Debug)]
+#[repr(C)]
+pub struct ElfSection {
+    name_index: u32,
+    typ: u32,
+    pub flags: u32,
+    pub addr: u32,
+    offset: u32,
+    pub size: u32,
+    link: u32,
+    info: u32,
+    addralign: u32,
+    entry_size: u32,
+}
+
+#[cfg(not(feature = "elf32"))]
 #[derive(Debug)]
 #[repr(C)]
 pub struct ElfSection {
@@ -128,8 +145,14 @@ pub enum ElfSectionType {
     // plus processor-specific use from 0x70000000 to 0x7FFFFFFF
 }
 
+#[cfg(feature = "elf32")]
+type ElfSectionFlagsType = u32;
+
+#[cfg(not(feature = "elf32"))]
+type ElfSectionFlagsType = u64;
+
 bitflags! {
-    flags ElfSectionFlags: u64 {
+    flags ElfSectionFlags: ElfSectionFlagsType {
         const ELF_SECTION_WRITABLE = 0x1,
         const ELF_SECTION_ALLOCATED = 0x2,
         const ELF_SECTION_EXECUTABLE = 0x4,