Add rust-elfloader to tree (needs modification for 32-bit ELF)

9 files changed, 1269 insertions, 0 deletions

diff --git a/Cargo.toml b/Cargo.toml
index 99470d5..11f646f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,3 +2,6 @@
 name = "rustv"
 version = "0.1.0"
 authors = ["David Li <li.davidm96@gmail.com>"]
+
+[dependencies.elfloader]
+path = "src/rust-elfloader"
diff --git a/src/rust-elfloader/.gitignore b/src/rust-elfloader/.gitignore
new file mode 100644
index 0000000..a93127b
--- /dev/null
+++ b/src/rust-elfloader/.gitignore
@@ -0,0 +1,14 @@
+# Compiled files
+*.o
+*.so
+*.rlib
+*.dll
+*.swp
+
+# Executables
+*.exe
+
+# Generated by Cargo
+/target/
+
+Cargo.lock
diff --git a/src/rust-elfloader/.travis.yml b/src/rust-elfloader/.travis.yml
new file mode 100644
index 0000000..7b53aa5
--- /dev/null
+++ b/src/rust-elfloader/.travis.yml
@@ -0,0 +1,2 @@
+language: rust
+rust: nightly
diff --git a/src/rust-elfloader/AUTHORS b/src/rust-elfloader/AUTHORS
new file mode 100644
index 0000000..20695b9
--- /dev/null
+++ b/src/rust-elfloader/AUTHORS
@@ -0,0 +1,3 @@
+Gerd Zellweger <mail@gerdzellweger.com>
+Christopher Cole <chris.cole.09@gmail.com>
+John Kåre Alsaker <john.kare.alsaker@gmail.com>
diff --git a/src/rust-elfloader/Cargo.toml b/src/rust-elfloader/Cargo.toml
new file mode 100644
index 0000000..ee5670f
--- /dev/null
+++ b/src/rust-elfloader/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "elfloader"
+version = "0.0.3"
+authors = ["Gerd Zellweger <mail@gerdzellweger.com>", "Christopher Cole <chris.cole.09@gmail.com>", "John Kåre Alsaker <john.kare.alsaker@gmail.com>"]
+repository = "https://github.com/gz/rust-elfloader"
+license = "Apache-2.0"
+description = "A rust library to load ELF files."
+keywords = ["elf", "x86", "os"]
+readme = "README.md"
diff --git a/src/rust-elfloader/LICENSE b/src/rust-elfloader/LICENSE
new file mode 100644
index 0000000..e06d208
--- /dev/null
+++ b/src/rust-elfloader/LICENSE
@@ -0,0 +1,202 @@
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diff --git a/src/rust-elfloader/README.md b/src/rust-elfloader/README.md
new file mode 100644
index 0000000..c49f38c
--- /dev/null
+++ b/src/rust-elfloader/README.md
@@ -0,0 +1,11 @@
+[![Build Status](https://travis-ci.org/gz/rust-elfloader.svg?branch=master)](https://travis-ci.org/gz/rust-elfloader)
+
+# rust-elfloader
+
+A library to load and relocate ELF files in memory.
+This library depends only on libcore so it can be used in kernel level code,
+for example to load user-space programs.
+
+This library reuses a modified version of the types.rs 
+file from [rust-elf](https://github.com/cole14/rust-elf)
+by Christopher Cole.
\ No newline at end of file
diff --git a/src/rust-elfloader/src/elf.rs b/src/rust-elfloader/src/elf.rs
new file mode 100644
index 0000000..5a1df57
--- /dev/null
+++ b/src/rust-elfloader/src/elf.rs
@@ -0,0 +1,848 @@
+use core::fmt;
+
+/// ELF magic number
+pub const ELF_MAGIC: &'static [u8] = &[0x7f, 'E' as u8, 'L' as u8, 'F' as u8];
+
+/// Represents the ELF file class (32-bit vs 64-bit)
+#[derive(Copy, Clone, PartialEq)]
+pub struct Class(pub u8);
+
+/// Invalid ELF file class
+pub const ELFCLASSNONE : Class = Class(0);
+/// 32-bit ELF file
+pub const ELFCLASS32 : Class = Class(1);
+/// 64-bit ELF file
+pub const ELFCLASS64 : Class = Class(2);
+
+impl fmt::Debug for Class {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{:#x}", self.0)
+    }
+}
+
+impl fmt::Display for Class {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        let str = match *self {
+            ELFCLASSNONE => "Invalid",
+            ELFCLASS32 => "32-bit",
+            ELFCLASS64 => "64-bit",
+            _ => "Unknown",
+        };
+        write!(f, "{}", str)
+    }
+}
+
+/// Represents the ELF file data format (little-endian vs big-endian)
+#[derive(Copy, Clone, PartialEq)]
+pub struct Data(pub u8);
+
+/// Invalid ELF data format
+pub const ELFDATANONE : Data = Data(0);
+/// little-endian ELF file
+pub const ELFDATA2LSB : Data = Data(1);
+/// big-endian ELF file
+pub const ELFDATA2MSB : Data = Data(2);
+
+impl fmt::Debug for Data {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{:#x}", self.0)
+    }
+}
+
+impl fmt::Display for Data {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        let str = match *self {
+            ELFDATANONE => "Invalid",
+            ELFDATA2LSB => "2's complement, little endian",
+            ELFDATA2MSB => "2's complement, big endian",
+            _ => "Unknown",
+        };
+        write!(f, "{}", str)
+    }
+}
+
+/// Represents the ELF file version
+#[derive(Copy, Clone, Eq, PartialEq)]
+pub struct Version(pub u8);
+
+/// Invalid version
+pub const EV_NONE : Version = Version(0);
+/// Current version
+pub const EV_CURRENT : Version = Version(1);
+
+impl fmt::Debug for Version {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{:#x}", self.0)
+    }
+}
+
+impl fmt::Display for Version {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        let str = match *self {
+            EV_NONE => "Invalid",
+            EV_CURRENT => "1 (Current)",
+            _ => "Unknown",
+        };
+        write!(f, "{}", str)
+    }
+}
+
+/// Represents the ELF file OS ABI
+#[derive(Copy, Clone, Eq, PartialEq)]
+pub struct OSABI(pub u8);
+
+/// Defaults to Unix System V
+pub const ELFOSABI_NONE : OSABI = OSABI(0);
+/// Unix System V
+pub const ELFOSABI_SYSV : OSABI = OSABI(0);
+/// HP-UX
+pub const ELFOSABI_HPUX : OSABI = OSABI(1);
+/// NetBSD
+pub const ELFOSABI_NETBSD : OSABI = OSABI(2);
+/// Linux with GNU extensions
+pub const ELFOSABI_LINUX : OSABI = OSABI(3);
+/// Solaris
+pub const ELFOSABI_SOLARIS : OSABI = OSABI(6);
+/// AIX
+pub const ELFOSABI_AIX : OSABI = OSABI(7);
+/// SGI Irix
+pub const ELFOSABI_IRIX : OSABI = OSABI(8);
+/// FreeBSD
+pub const ELFOSABI_FREEBSD : OSABI = OSABI(9);
+/// Compaq TRU64 UNIX
+pub const ELFOSABI_TRU64 : OSABI = OSABI(10);
+/// Novell Modesto
+pub const ELFOSABI_MODESTO : OSABI = OSABI(11);
+/// OpenBSD
+pub const ELFOSABI_OPENBSD : OSABI = OSABI(12);
+
+impl fmt::Debug for OSABI {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{:#x}", self.0)
+    }
+}
+
+impl fmt::Display for OSABI {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        let str = match *self {
+            ELFOSABI_SYSV => "UNIX System V",
+            ELFOSABI_HPUX => "HP-UX",
+            ELFOSABI_NETBSD => "NetBSD",
+            ELFOSABI_LINUX => "Linux with GNU extensions",
+            ELFOSABI_SOLARIS => "Solaris",
+            ELFOSABI_AIX => "AIX",
+            ELFOSABI_IRIX => "SGI Irix",
+            ELFOSABI_FREEBSD => "FreeBSD",
+            ELFOSABI_TRU64 => "Compaq TRU64 UNIX",
+            ELFOSABI_MODESTO => "Novell Modesto",
+            ELFOSABI_OPENBSD => "OpenBSD",
+            _ => "Unknown",
+        };
+        write!(f, "{}", str)
+    }
+}
+
+/// Represents the ELF file type (object, executable, shared lib, core)
+#[derive(Copy, Clone, Eq, PartialEq)]
+pub struct Type(pub u16);
+/// No file type
+pub const ET_NONE : Type = Type(0);
+/// Relocatable object file
+pub const ET_REL : Type = Type(1);
+/// Executable file
+pub const ET_EXEC : Type = Type(2);
+/// Shared library
+pub const ET_DYN : Type = Type(3);
+/// Core file
+pub const ET_CORE : Type = Type(4);
+
+impl fmt::Debug for Type {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{:#x}", self.0)
+    }
+}
+
+impl fmt::Display for Type {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        let str = match *self {
+            ET_NONE => "No file type",
+            ET_REL => "Relocatable file",
+            ET_EXEC => "Executable file",
+            ET_DYN => "Shared object file",
+            ET_CORE => "Core file",
+            _ => "Unknown",
+        };
+        write!(f, "{}", str)
+    }
+}
+
+/// Represents the ELF file machine architecture
+#[derive(Copy, Clone, Eq, PartialEq)]
+pub struct Machine(pub u16);
+pub const EM_NONE : Machine = Machine(0);
+pub const EM_M32 : Machine = Machine(1);
+pub const EM_SPARC : Machine = Machine(2);
+pub const EM_386 : Machine = Machine(3);
+pub const EM_68K : Machine = Machine(4);
+pub const EM_88K : Machine = Machine(5);
+pub const EM_860 : Machine = Machine(7);
+pub const EM_MIPS : Machine = Machine(8);
+pub const EM_S370 : Machine = Machine(9);
+pub const EM_MIPS_RS3_LE : Machine = Machine(10);
+pub const EM_PARISC : Machine = Machine(15);
+pub const EM_VPP500 : Machine = Machine(17);
+pub const EM_SPARC32PLUS : Machine = Machine(18);
+pub const EM_960 : Machine = Machine(19);
+pub const EM_PPC : Machine = Machine(20);
+pub const EM_PPC64 : Machine = Machine(21);
+pub const EM_S390 : Machine = Machine(22);
+pub const EM_V800 : Machine = Machine(36);
+pub const EM_FR20 : Machine = Machine(37);
+pub const EM_RH32 : Machine = Machine(38);
+pub const EM_RCE : Machine = Machine(39);
+pub const EM_ARM : Machine = Machine(40);
+pub const EM_FAKE_ALPHA : Machine = Machine(41);
+pub const EM_SH : Machine = Machine(42);
+pub const EM_SPARCV9 : Machine = Machine(43);
+pub const EM_TRICORE : Machine = Machine(44);
+pub const EM_ARC : Machine = Machine(45);
+pub const EM_H8_300 : Machine = Machine(46);
+pub const EM_H8_300H : Machine = Machine(47);
+pub const EM_H8S : Machine = Machine(48);
+pub const EM_H8_500 : Machine = Machine(49);
+pub const EM_IA_64 : Machine = Machine(50);
+pub const EM_MIPS_X : Machine = Machine(51);
+pub const EM_COLDFIRE : Machine = Machine(52);
+pub const EM_68HC12 : Machine = Machine(53);
+pub const EM_MMA : Machine = Machine(54);
+pub const EM_PCP : Machine = Machine(55);
+pub const EM_NCPU : Machine = Machine(56);
+pub const EM_NDR1 : Machine = Machine(57);
+pub const EM_STARCORE : Machine = Machine(58);
+pub const EM_ME16 : Machine = Machine(59);
+pub const EM_ST100 : Machine = Machine(60);
+pub const EM_TINYJ : Machine = Machine(61);
+pub const EM_X86_64 : Machine = Machine(62);
+pub const EM_PDSP : Machine = Machine(63);
+pub const EM_FX66 : Machine = Machine(66);
+pub const EM_ST9PLUS : Machine = Machine(67);
+pub const EM_ST7 : Machine = Machine(68);
+pub const EM_68HC16 : Machine = Machine(69);
+pub const EM_68HC11 : Machine = Machine(70);
+pub const EM_68HC08 : Machine = Machine(71);
+pub const EM_68HC05 : Machine = Machine(72);
+pub const EM_SVX : Machine = Machine(73);
+pub const EM_ST19 : Machine = Machine(74);
+pub const EM_VAX : Machine = Machine(75);
+pub const EM_CRIS : Machine = Machine(76);
+pub const EM_JAVELIN : Machine = Machine(77);
+pub const EM_FIREPATH : Machine = Machine(78);
+pub const EM_ZSP : Machine = Machine(79);
+pub const EM_MMIX : Machine = Machine(80);
+pub const EM_HUANY : Machine = Machine(81);
+pub const EM_PRISM : Machine = Machine(82);
+pub const EM_AVR : Machine = Machine(83);
+pub const EM_FR30 : Machine = Machine(84);
+pub const EM_D10V : Machine = Machine(85);
+pub const EM_D30V : Machine = Machine(86);
+pub const EM_V850 : Machine = Machine(87);
+pub const EM_M32R : Machine = Machine(88);
+pub const EM_MN10300 : Machine = Machine(89);
+pub const EM_MN10200 : Machine = Machine(90);
+pub const EM_PJ : Machine = Machine(91);
+pub const EM_OPENRISC : Machine = Machine(92);
+pub const EM_ARC_A5 : Machine = Machine(93);
+pub const EM_XTENSA : Machine = Machine(94);
+pub const EM_AARCH64 : Machine = Machine(183);
+pub const EM_TILEPRO : Machine = Machine(188);
+pub const EM_MICROBLAZE : Machine = Machine(189);
+pub const EM_TILEGX : Machine = Machine(191);
+
+impl fmt::Debug for Machine {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{:#x}", self.0)
+    }
+}
+
+impl fmt::Display for Machine {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        let str = match *self {
+            EM_NONE => "No machine",
+            EM_M32 => "AT&T WE 32100",
+            EM_SPARC => "SUN SPARC",
+            EM_386 => "Intel 80386",
+            EM_68K => "Motorola m68k family",
+            EM_88K => "Motorola m88k family",
+            EM_860 => "Intel 80860",
+            EM_MIPS => "MIPS R3000 big-endian",
+            EM_S370 => "IBM System/370",
+            EM_MIPS_RS3_LE => "MIPS R3000 little-endian",
+            EM_PARISC => "HPPA",
+            EM_VPP500 => "Fujitsu VPP500",
+            EM_SPARC32PLUS => "Sun's 'v8plus'",
+            EM_960 => "Intel 80960",
+            EM_PPC => "PowerPC",
+            EM_PPC64 => "PowerPC 64-bit",
+            EM_S390 => "IBM S390",
+            EM_V800 => "NEC V800 series",
+            EM_FR20 => "Fujitsu FR20",
+            EM_RH32 => "TRW RH-32",
+            EM_RCE => "Motorola RCE",
+            EM_ARM => "ARM",
+            EM_FAKE_ALPHA => "Digital Alpha",
+            EM_SH => "Hitachi SH",
+            EM_SPARCV9 => "SPARC v9 64-bit",
+            EM_TRICORE => "Siemens Tricore",
+            EM_ARC => "Argonaut RISC Core",
+            EM_H8_300 => "Hitachi H8/300",
+            EM_H8_300H => "Hitachi H8/300H",
+            EM_H8S => "Hitachi H8S",
+            EM_H8_500 => "Hitachi H8/500",
+            EM_IA_64 => "Intel Merced",
+            EM_MIPS_X => "Stanford MIPS-X",
+            EM_COLDFIRE => "Motorola Coldfire",
+            EM_68HC12 => "Motorola M68HC12",
+            EM_MMA => "Fujitsu MMA Multimedia Accelerato",
+            EM_PCP => "Siemens PCP",
+            EM_NCPU => "Sony nCPU embeeded RISC",
+            EM_NDR1 => "Denso NDR1 microprocessor",
+            EM_STARCORE => "Motorola Start*Core processor",
+            EM_ME16 => "Toyota ME16 processor",
+            EM_ST100 => "STMicroelectronic ST100 processor",
+            EM_TINYJ => "Advanced Logic Corp. Tinyj emb.fa",
+            EM_X86_64 => "AMD x86-64 architecture",
+            EM_PDSP => "Sony DSP Processor",
+            EM_FX66 => "Siemens FX66 microcontroller",
+            EM_ST9PLUS => "STMicroelectronics ST9+ 8/16 mc",
+            EM_ST7 => "STmicroelectronics ST7 8 bit mc",
+            EM_68HC16 => "Motorola MC68HC16 microcontroller",
+            EM_68HC11 => "Motorola MC68HC11 microcontroller",
+            EM_68HC08 => "Motorola MC68HC08 microcontroller",
+            EM_68HC05 => "Motorola MC68HC05 microcontroller",
+            EM_SVX => "Silicon Graphics SVx",
+            EM_ST19 => "STMicroelectronics ST19 8 bit mc",
+            EM_VAX => "Digital VAX",
+            EM_CRIS => "Axis Communications 32-bit embedded processor",
+            EM_JAVELIN => "Infineon Technologies 32-bit embedded processor",
+            EM_FIREPATH => "Element 14 64-bit DSP Processor",
+            EM_ZSP => "LSI Logic 16-bit DSP Processor",
+            EM_MMIX => "Donald Knuth's educational 64-bit processor",
+            EM_HUANY => "Harvard University machine-independent object files",
+            EM_PRISM => "SiTera Prism",
+            EM_AVR => "Atmel AVR 8-bit microcontroller",
+            EM_FR30 => "Fujitsu FR30",
+            EM_D10V => "Mitsubishi D10V",
+            EM_D30V => "Mitsubishi D30V",
+            EM_V850 => "NEC v850",
+            EM_M32R => "Mitsubishi M32R",
+            EM_MN10300 => "Matsushita MN10300",
+            EM_MN10200 => "Matsushita MN10200",
+            EM_PJ => "picoJava",
+            EM_OPENRISC => "OpenRISC 32-bit embedded processor",
+            EM_ARC_A5 => "ARC Cores Tangent-A5",
+            EM_XTENSA => "Tensilica Xtensa Architecture",
+            EM_AARCH64 => "ARM AARCH64",
+            EM_TILEPRO => "Tilera TILEPro",
+            EM_MICROBLAZE => "Xilinx MicroBlaze",
+            EM_TILEGX => "Tilera TILE-Gx",
+            _ => "Unknown",
+        };
+        write!(f, "{}", str)
+    }
+}
+
+/// First 16 bytes of the ELF file header.
+#[derive(Copy, Clone, Debug)]
+#[repr(C, packed)]
+pub struct ElfIdent {
+    /// Must have value [0x7f, 'E', 'L', 'F'].
+    pub magic: [u8; 4],
+
+    /// 32-bit vs 64-bit
+    pub class:      Class,
+    /// little vs big endian
+    pub data:       Data,
+    /// elf version
+    pub version:    Version,
+    /// OS ABI
+    pub osabi:      OSABI,
+    /// Version of the OS ABI
+    pub abiversion: u8,
+    // Reserved (should be zero).
+    pub padding: [u8; 7],
+}
+
+impl fmt::Display for ElfIdent {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        let valid_magic = match self.magic == ELF_MAGIC {
+                                    true => "valid magic",
+                                    _ => "invalid magic"
+                                };
+        write!(f, "ElfIdent: {} {} {} {} {}", valid_magic, self.class, self.data, self.version, self.osabi)
+    }
+}
+
+/// Encapsulates the contents of the ELF File Header
+#[derive(Copy, Clone, Debug)]
+#[repr(C, packed)]
+pub struct FileHeader {
+    pub ident: ElfIdent,
+    /// ELF file type
+    pub elftype:    Type,
+    /// Target machine architecture
+    pub machine:    Machine,
+    /// ELF version
+    pub version:    u32,
+    /// Virtual address of program entry point
+    pub entry:      u32,
+    /// Start of program headers (bytes into file)
+    pub phoff:      u32,
+    /// Start of section headers (bytes into file)
+    pub shoff:      u32,
+    pub flags:      u32,
+    /// Size of this header.
+    pub ehsize:     u16,
+    /// Size of program headers.
+    pub phentsize:  u16,
+    /// Number of program headers.
+    pub phnum:      u16,
+    /// Size of section headers.
+    pub shentsize:  u16,
+    /// Number of section headers.
+    pub shnum:      u16,
+    /// Section header string table index.
+    pub shstrndx:   u16,
+}
+
+impl fmt::Display for FileHeader {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "FileHeader: [{}] is {} for {} in version {} starts at {:x}",
+               self.ident, self.elftype, self.machine,
+               self.version, self.entry)
+    }
+}
+
+/// Represents ELF Program Header flags
+#[derive(Copy, Clone, PartialEq)]
+pub struct ProgFlag(pub u32);
+
+pub const PF_NONE : ProgFlag = ProgFlag(0);
+/// Executable program segment
+pub const PF_X : ProgFlag = ProgFlag(1);
+/// Writable program segment
+pub const PF_W : ProgFlag = ProgFlag(2);
+/// Readable program segment
+pub const PF_R : ProgFlag = ProgFlag(4);
+
+impl fmt::Debug for ProgFlag {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{:#x}", self.0)
+    }
+}
+
+impl fmt::Display for ProgFlag {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        if (self.0 & PF_R.0) != 0 {
+            try!(write!(f, "R"));
+        } else {
+            try!(write!(f, " "));
+        }
+        if (self.0 & PF_W.0) != 0 {
+            try!(write!(f, "W"));
+        } else {
+            try!(write!(f, " "));
+        }
+        if (self.0 & PF_X.0) != 0 {
+            write!(f, "E")
+        } else {
+            write!(f, " ")
+        }
+    }
+}
+
+/// Represents ELF Program Header type
+#[derive(Copy, Clone, PartialEq)]
+pub struct ProgType(pub u32);
+
+/// Program header table entry unused
+pub const PT_NULL : ProgType = ProgType(0);
+/// Loadable program segment
+pub const PT_LOAD : ProgType = ProgType(1);
+/// Dynamic linking information
+pub const PT_DYNAMIC : ProgType = ProgType(2);
+/// Program interpreter
+pub const PT_INTERP : ProgType = ProgType(3);
+/// Auxiliary information
+pub const PT_NOTE : ProgType = ProgType(4);
+/// Unused
+pub const PT_SHLIB : ProgType = ProgType(5);
+/// The program header table
+pub const PT_PHDR : ProgType = ProgType(6);
+/// Thread-local storage segment
+pub const PT_TLS : ProgType = ProgType(7);
+/// GCC .eh_frame_hdr segment
+pub const PT_GNU_EH_FRAME : ProgType = ProgType(0x6474e550);
+/// Indicates stack executability
+pub const PT_GNU_STACK : ProgType = ProgType(0x6474e551);
+/// Read-only after relocation
+pub const PT_GNU_RELRO : ProgType = ProgType(0x6474e552);
+
+impl fmt::Debug for ProgType {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{:#x}", self.0)
+    }
+}
+
+impl fmt::Display for ProgType {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        let str = match *self {
+            PT_NULL => "NULL",
+            PT_LOAD => "LOAD",
+            PT_DYNAMIC => "DYNAMIC",
+            PT_INTERP => "INTERP",
+            PT_NOTE => "NOTE",
+            PT_SHLIB => "SHLIB",
+            PT_PHDR => "PHDR",
+            PT_TLS => "TLS",
+            PT_GNU_EH_FRAME => "GNU_EH_FRAME",
+            PT_GNU_STACK => "GNU_STACK",
+            PT_GNU_RELRO => "GNU_RELRO",
+            _ => "Unknown",
+        };
+        write!(f, "{}", str)
+    }
+}
+
+/// Encapsulates the contents of an ELF Program Header
+///
+/// The program header table is an array of program header structures describing
+/// the various segments for program execution.
+#[derive(Copy, Clone, Debug)]
+pub struct ProgramHeader {
+    /// Program segment type
+    pub progtype: ProgType,
+    /// Offset into the ELF file where this segment begins
+    pub offset:   u32,
+    /// Virtual address where this segment should be loaded
+    pub vaddr:    u32,
+    /// Physical address where this segment should be loaded
+    pub paddr:    u32,
+    /// Size of this segment in the file
+    pub filesz:   u32,
+    /// Size of this segment in memory
+    pub memsz:    u32,
+    /// Flags for this segment
+    pub flags:    ProgFlag,
+    /// file and memory alignment
+    pub align:    u32,
+}
+
+impl fmt::Display for ProgramHeader {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "Program Header: Type: {} Offset: {:#010x} VirtAddr: {:#010x} PhysAddr: {:#010x} FileSize: {:#06x} MemSize: {:#06x} Flags: {} Align: {:#x}",
+            self.progtype, self.offset, self.vaddr, self.paddr, self.filesz,
+            self.memsz, self.flags, self.align)
+    }
+}
+
+/// Represens ELF Section type
+#[derive(Copy, Clone, PartialEq)]
+pub struct SectionType(pub u32);
+
+/// Inactive section with undefined values
+pub const SHT_NULL : SectionType = SectionType(0);
+/// Information defined by the program, includes executable code and data
+pub const SHT_PROGBITS : SectionType = SectionType(1);
+/// Section data contains a symbol table
+pub const SHT_SYMTAB : SectionType = SectionType(2);
+/// Section data contains a string table
+pub const SHT_STRTAB : SectionType = SectionType(3);
+/// Section data contains relocation entries with explicit addends
+pub const SHT_RELA : SectionType = SectionType(4);
+/// Section data contains a symbol hash table. Must be present for dynamic linking
+pub const SHT_HASH : SectionType = SectionType(5);
+/// Section data contains information for dynamic linking
+pub const SHT_DYNAMIC : SectionType = SectionType(6);
+/// Section data contains information that marks the file in some way
+pub const SHT_NOTE : SectionType = SectionType(7);
+/// Section data occupies no space in the file but otherwise resembles SHT_PROGBITS
+pub const SHT_NOBITS : SectionType = SectionType(8);
+/// Section data contains relocation entries without explicit addends
+pub const SHT_REL : SectionType = SectionType(9);
+/// Section is reserved but has unspecified semantics
+pub const SHT_SHLIB : SectionType = SectionType(10);
+/// Section data contains a minimal set of dynamic linking symbols
+pub const SHT_DYNSYM : SectionType = SectionType(11);
+/// Section data contains an array of constructors
+pub const SHT_INIT_ARRAY : SectionType = SectionType(14);
+/// Section data contains an array of destructors
+pub const SHT_FINI_ARRAY : SectionType = SectionType(15);
+/// Section data contains an array of pre-constructors
+pub const SHT_PREINIT_ARRAY : SectionType = SectionType(16);
+/// Section group
+pub const SHT_GROUP : SectionType = SectionType(17);
+/// Extended symbol table section index
+pub const SHT_SYMTAB_SHNDX : SectionType = SectionType(18);
+/// Number of reserved SHT_* values
+pub const SHT_NUM : SectionType = SectionType(19);
+/// Object attributes
+pub const SHT_GNU_ATTRIBUTES : SectionType = SectionType(0x6ffffff5);
+/// GNU-style hash section
+pub const SHT_GNU_HASH : SectionType = SectionType(0x6ffffff6);
+/// Pre-link library list
+pub const SHT_GNU_LIBLIST : SectionType = SectionType(0x6ffffff7);
+/// Version definition section
+pub const SHT_GNU_VERDEF : SectionType = SectionType(0x6ffffffd);
+/// Version needs section
+pub const SHT_GNU_VERNEED : SectionType = SectionType(0x6ffffffe);
+/// Version symbol table
+pub const SHT_GNU_VERSYM : SectionType = SectionType(0x6fffffff);
+
+impl fmt::Debug for SectionType {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{:#x}", self.0)
+    }
+}
+
+impl fmt::Display for SectionType {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        let str = match *self {
+            SHT_NULL => "SHT_NULL",
+            SHT_PROGBITS => "SHT_PROGBITS",
+            SHT_SYMTAB => "SHT_SYMTAB",
+            SHT_STRTAB => "SHT_STRTAB",
+            SHT_RELA => "SHT_RELA",
+            SHT_HASH => "SHT_HASH",
+            SHT_DYNAMIC => "SHT_DYNAMIC",
+            SHT_NOTE => "SHT_NOTE",
+            SHT_NOBITS => "SHT_NOBITS",
+            SHT_REL => "SHT_REL",
+            SHT_SHLIB => "SHT_SHLIB",
+            SHT_DYNSYM => "SHT_DYNSYM",
+            SHT_INIT_ARRAY => "SHT_INIT_ARRAY",
+            SHT_FINI_ARRAY => "SHT_FINI_ARRAY",
+            SHT_PREINIT_ARRAY => "SHT_PREINIT_ARRAY",
+            SHT_GROUP => "SHT_GROUP",
+            SHT_SYMTAB_SHNDX => "SHT_SYMTAB_SHNDX",
+            SHT_NUM => "SHT_NUM",
+            SHT_GNU_ATTRIBUTES => "SHT_GNU_ATTRIBUTES",
+            SHT_GNU_HASH => "SHT_GNU_HASH",
+            SHT_GNU_LIBLIST => "SHT_GNU_LIBLIST",
+            SHT_GNU_VERDEF => "SHT_GNU_VERDEF",
+            SHT_GNU_VERNEED => "SHT_GNU_VERNEED",
+            SHT_GNU_VERSYM => "SHT_GNU_VERSYM",
+            _ => "Unknown",
+        };
+        write!(f, "{}", str)
+    }
+}
+
+///
+/// Wrapper type for SectionFlag
+///
+#[derive(Copy, Clone, PartialEq)]
+pub struct SectionFlag(pub u64);
+
+/// Empty flags
+pub const SHF_NONE : SectionFlag = SectionFlag(0);
+/// Writable
+pub const SHF_WRITE : SectionFlag = SectionFlag(1);
+/// Occupies memory during execution
+pub const SHF_ALLOC : SectionFlag = SectionFlag(2);
+/// Executable
+pub const SHF_EXECINSTR : SectionFlag = SectionFlag(4);
+/// Might be merged
+pub const SHF_MERGE : SectionFlag = SectionFlag(16);
+/// Contains nul-terminated strings
+pub const SHF_STRINGS : SectionFlag = SectionFlag(32);
+/// `sh_info' contains SHT index
+pub const SHF_INFO_LINK : SectionFlag = SectionFlag(64);
+/// Preserve order after combining
+pub const SHF_LINK_ORDER : SectionFlag = SectionFlag(128);
+/// Non-standard OS specific handling required
+pub const SHF_OS_NONCONFORMING : SectionFlag = SectionFlag(256);
+/// Section is member of a group
+pub const SHF_GROUP : SectionFlag = SectionFlag(512);
+/// Section hold thread-local data
+pub const SHF_TLS : SectionFlag = SectionFlag(1024);
+
+impl fmt::Debug for SectionFlag {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{:#x}", self.0)
+    }
+}
+
+impl fmt::Display for SectionFlag {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{:#x}", self.0)
+    }
+}
+
+// An offset to a null terminated string in the section string table
+#[derive(Copy, Clone)]
+pub struct StrOffset(pub u32);
+
+impl fmt::Debug for StrOffset {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{:#x}", self.0)
+    }
+}
+
+impl fmt::Display for StrOffset {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{:#x}", self.0)
+    }
+}
+
+/// Encapsulates the contents of an ELF Section Header
+#[derive(Debug)]
+pub struct SectionHeader {
+    /// Section Name
+    pub name:      StrOffset,
+    /// Section Type
+    pub shtype:    SectionType,
+    /// Section Flags
+    pub flags:     SectionFlag,
+    /// in-memory address where this section is loaded
+    pub addr:      u64,
+    /// Byte-offset into the file where this section starts
+    pub offset:    u64,
+    /// Section size in bytes
+    pub size:      u64,
+    /// Defined by section type
+    pub link:      u32,
+    /// Defined by section type
+    pub info:      u32,
+    /// address alignment
+    pub addralign: u64,
+    /// size of an entry if section data is an array of entries
+    pub entsize:   u64,
+}
+
+impl fmt::Display for SectionHeader {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "Section Header: Name: {} Type: {} Flags: {} Addr: {:#010x} Offset: {:#06x} Size: {:#06x} Link: {} Info: {:#x} AddrAlign: {} EntSize: {}",
+            self.name, self.shtype, self.flags, self.addr, self.offset,
+            self.size, self.link, self.info, self.addralign, self.entsize)
+    }
+}
+
+#[derive(Copy, Clone)]
+pub struct SymbolType(pub u8);
+
+/// Unspecified symbol type
+pub const STT_NOTYPE : SymbolType = SymbolType(0);
+/// Data object symbol
+pub const STT_OBJECT : SymbolType = SymbolType(1);
+/// Code object symbol
+pub const STT_FUNC : SymbolType = SymbolType(2);
+/// Section symbol
+pub const STT_SECTION : SymbolType = SymbolType(3);
+/// File name symbol
+pub const STT_FILE : SymbolType = SymbolType(4);
+/// Common data object symbol
+pub const STT_COMMON : SymbolType = SymbolType(5);
+/// Thread-local data object symbol
+pub const STT_TLS	 : SymbolType = SymbolType(6);
+/// Indirect code object symbol
+pub const STT_GNU_IFUNC : SymbolType = SymbolType(10);
+
+impl fmt::Display for SymbolType {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        let str = match *self {
+            STT_NOTYPE => "unspecified",
+            STT_OBJECT => "data object",
+            STT_FUNC => "code object",
+            STT_SECTION => "section",
+            STT_FILE => "file name",
+            STT_COMMON => "common data object",
+            STT_TLS => "thread-local data object",
+            STT_GNU_IFUNC => "indirect code object",
+            _ => "Unknown",
+        };
+        write!(f, "{}", str)
+    }
+}
+
+#[derive(Copy, Clone)]
+pub struct SymbolBind(pub u8);
+
+/// Local symbol
+pub const STB_LOCAL : SymbolBind = SymbolBind(0);
+/// Global symbol
+pub const STB_GLOBAL : SymbolBind = SymbolBind(1);
+/// Weak symbol
+pub const STB_WEAK : SymbolBind = SymbolBind(2);
+/// Unique symbol
+pub const STB_GNU_UNIQUE : SymbolBind = SymbolBind(10);
+
+impl fmt::Display for SymbolBind {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        let str = match *self {
+            STB_LOCAL => "local",
+            STB_GLOBAL => "global",
+            STB_WEAK => "weak",
+            STB_GNU_UNIQUE => "unique",
+            _ => "Unknown",
+        };
+        write!(f, "{}", str)
+    }
+}
+
+#[derive(Copy, Clone)]
+pub struct SymbolVis(pub u8);
+
+/// Default symbol visibility
+pub const STV_DEFAULT : SymbolVis = SymbolVis(0);
+/// Processor-specific hidden visibility
+pub const STV_INTERNAL : SymbolVis = SymbolVis(1);
+/// Hidden visibility
+pub const STV_HIDDEN : SymbolVis = SymbolVis(2);
+/// Protected visibility
+pub const STV_PROTECTED : SymbolVis = SymbolVis(3);
+
+impl fmt::Display for SymbolVis {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        let str = match *self {
+            STV_DEFAULT => "default",
+            STV_INTERNAL => "internal",
+            STV_HIDDEN => "hidden",
+            STV_PROTECTED => "protected",
+            _ => "Unknown",
+        };
+        write!(f, "{}", str)
+    }
+}
+
+pub struct Symbol {
+    /// Symbol name
+    pub name: StrOffset,
+    info: u8,
+    other: u8,
+    section_index: u16,
+    /// Symbol value
+    pub value: u64,
+    /// Symbol size
+    pub size: u64,
+}
+
+impl fmt::Display for Symbol {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "Symbol: [{}] @ {:#x} size {:#x} in section {}",
+               self.name, self.value, self.size, self.section_index)
+    }
+}
+
+impl Symbol {
+    pub fn sym_type(&self) -> SymbolType {
+        SymbolType(self.info & 0xf)
+    }
+
+    pub fn sym_bind(&self) -> SymbolBind {
+        SymbolBind(self.info >> 4)
+    }
+
+    pub fn sym_vis(&self) -> SymbolVis {
+        SymbolVis(self.other & 0x3)
+    }
+}
diff --git a/src/rust-elfloader/src/lib.rs b/src/rust-elfloader/src/lib.rs
new file mode 100644
index 0000000..e344bcb
--- /dev/null
+++ b/src/rust-elfloader/src/lib.rs
@@ -0,0 +1,177 @@
+#![feature(no_std, core, core_prelude, core_slice_ext, custom_derive)]
+#![no_std]
+
+#![crate_name = "elfloader"]
+#![crate_type = "lib"]
+
+#[cfg(test)]
+#[macro_use]
+extern crate std;
+
+pub mod elf;
+use core::fmt;
+use core::mem::{transmute, size_of};
+
+pub type PAddr = u64;
+pub type VAddr = usize;
+
+/// Abstract representation of a loadable ELF binary.
+pub struct ElfBinary<'s> {
+    name: &'s str,
+    region: &'s [u8],
+    header: &'s elf::FileHeader,
+}
+
+impl<'s> fmt::Debug for ElfBinary<'s> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{} {}", self.name, self.header)
+    }
+}
+
+/// Implement this for ELF loading.
+pub trait ElfLoader {
+    /// Allocates a virtual region of size amount of bytes.
+    fn allocate(&mut self, base: VAddr, size: usize, flags: elf::ProgFlag);
+
+    /// Copies the region into the base.
+    fn load(&mut self, base: VAddr, region: &'static [u8]);
+}
+
+// T must be a POD for this to be safe
+unsafe fn slice_pod<T>(region: &[u8], offset: usize, count: usize) -> &[T] {
+    assert!(region.len() - offset >= count * size_of::<T>());
+    core::slice::from_raw_parts(region[offset..].as_ptr() as *const T, count)
+}
+
+impl<'s> ElfBinary<'s> {
+
+    /// Create a new ElfBinary.
+    /// Makes sure that the provided region has valid ELF magic byte sequence
+    /// and is big enough to contain at least the ELF file header
+    /// otherwise it will return None.
+    pub fn new(name: &'s str, region: &'s [u8]) -> Option<ElfBinary<'s>> {
+        if region.len() >= size_of::<elf::FileHeader>() && region.starts_with(elf::ELF_MAGIC) {
+            let header: &elf::FileHeader = unsafe { &slice_pod(region, 0, 1)[0] };
+            return Some(ElfBinary { name: name, region: region, header: header });
+        }
+
+        None
+    }
+
+    /// Print the program headers.
+    pub fn print_program_headers(&self) {
+        for p in self.program_headers() {
+            //log!("pheader = {}", p);
+        }
+    }
+
+    /// Create a slice of the program headers.
+    pub fn program_headers(&self) -> &'s [elf::ProgramHeader] {
+        let correct_header_size = self.header.phentsize as usize == size_of::<elf::ProgramHeader>();
+        let pheader_region_size = self.header.phoff as usize + self.header.phnum as usize * self.header.phentsize as usize;
+        let big_enough_region = self.region.len() >= pheader_region_size;
+
+        if self.header.phoff == 0 || !correct_header_size || !big_enough_region {
+            return &[];
+        }
+
+        unsafe {
+            slice_pod(self.region, self.header.phoff as usize, self.header.phnum as usize)
+        }
+    }
+
+    // Get the string at offset str_offset in the string table strtab
+    fn strtab_str(&self, strtab: &'s elf::SectionHeader, str_offset: elf::StrOffset) -> &'s str {
+        assert!(strtab.shtype == elf::SHT_STRTAB);
+        let data = self.section_data(strtab);
+        let offset = str_offset.0 as usize;
+        let mut end = offset;
+        while data[end] != 0 {
+            end += 1;
+        }
+        core::str::from_utf8(&data[offset..end]).unwrap()
+    }
+
+    // Get the name of the section
+    pub fn symbol_name(&self, symbol: &'s elf::Symbol) -> &'s str {
+        let strtab = self.section_headers().iter().find(|s| s.shtype == elf::SHT_STRTAB && self.section_name(s) == ".strtab").unwrap();
+        self.strtab_str(strtab, symbol.name)
+    }
+
+    // Get the data of the section
+    pub fn section_data(&self, section: &'s elf::SectionHeader) -> &'s [u8] {
+        &self.region[(section.offset as usize)..(section.offset as usize + section.size as usize)]
+    }
+
+    // Get the name of the section
+    pub fn section_name(&self, section: &'s elf::SectionHeader) -> &'s str {
+        self.strtab_str(&self.section_headers()[self.header.shstrndx as usize], section.name)
+    }
+
+    // Get the symbols of the section
+    fn section_symbols(&self, section: &'s elf::SectionHeader) -> &'s [elf::Symbol] {
+        assert!(section.shtype == elf::SHT_SYMTAB);
+        unsafe {
+            slice_pod(self.section_data(section), 0, section.size as usize / size_of::<elf::Symbol>())
+        }
+    }
+
+    // Enumerate all the symbols in the file
+    pub fn for_each_symbol<F: FnMut(&'s elf::Symbol)>(&self, mut func: F) {
+        for sym in self.section_headers().iter().filter(|s| s.shtype == elf::SHT_SYMTAB).flat_map(|s| self.section_symbols(s).iter()) {
+            func(sym);
+        }
+    }
+
+    /// Create a slice of the section headers.
+    pub fn section_headers(&self) -> &'s [elf::SectionHeader] {
+        let correct_header_size = self.header.shentsize as usize == size_of::<elf::SectionHeader>();
+        let sheader_region_size = self.header.shoff as usize + self.header.shnum as usize * self.header.shentsize as usize;
+        let big_enough_region = self.region.len() >= sheader_region_size;
+
+        if self.header.shoff == 0 || !correct_header_size || !big_enough_region {
+            return &[];
+        }
+
+        unsafe {
+            slice_pod(self.region, self.header.shoff as usize, self.header.shnum as usize)
+        }
+    }
+
+    /// Can we load the binary on our platform?
+    fn can_load(&self) -> bool {
+        let correct_class = self.header.ident.class == elf::ELFCLASS64;
+        let correct_elfversion = self.header.ident.version == elf::EV_CURRENT;
+        let correct_data = self.header.ident.data == elf::ELFDATA2LSB;
+        let correct_osabi = self.header.ident.osabi == elf::ELFOSABI_SYSV || self.header.ident.osabi == elf::ELFOSABI_LINUX;
+        let correct_type = self.header.elftype == elf::ET_EXEC || self.header.elftype == elf::ET_DYN;
+        let correct_machine = self.header.machine == elf::EM_X86_64;
+
+        correct_class && correct_data && correct_elfversion && correct_machine && correct_osabi && correct_type
+    }
+
+    fn load_header(&self, p: &elf::ProgramHeader, loader: &mut ElfLoader) {
+        let big_enough_region = self.region.len() >= (p.offset + p.filesz) as usize;
+        if !big_enough_region {
+            //log!("Unable to load {}", p);
+            return;
+        }
+
+        loader.allocate(p.vaddr as usize, p.memsz as usize, p.flags);
+        let segment: &'static [u8] = unsafe {
+            core::slice::from_raw_parts(
+                transmute(&self.region[p.offset as usize]), p.filesz as usize)
+        };
+        loader.load(p.vaddr as usize, segment);
+    }
+
+    pub fn load(&self, loader: &mut ElfLoader) {
+        for p in self.program_headers() {
+            let x = match p.progtype {
+                elf::PT_LOAD => self.load_header(p, loader),
+                _ => ()
+            };
+        }
+    }
+
+}