ELF Header Reader in Rust

This program is a simple utility written in Rust that reads and displays the ELF (Executable and Linkable Format) header of a given binary. The tool mimics the behavior of the readelf -h command, showing basic details about the ELF file.

Features

• Displays the magic bytes of the ELF header.
• Describes the type of the ELF (e.g., REL, EXEC, DYN, CORE).
• Describes the machine type (e.g., i386, X86_64).
• Shows other pertinent details such as version, entry point address, program headers' start and size, section headers' start and size, and more.

Usage

To use the program, simply compile it and then run:

> cargo run
// or
> cargo run /bin/wc

If you don't specify the path to the target file, the program defaults to reading the header of /bin/ls.

Sample Output

The output might look something like:

ELF Header:
  Magic:   7f 45 4c 46 02 01 01 00 00 00 00 00 00 00 00 00
  Type:                              EXEC (Executable file)
  Machine:                           X86_64 (AMD x86-64 architecture)
  Version:                           0x1
  Entry point address:               0x400080
  Start of program headers:          64
  Start of section headers:          123456
  Flags:                             0x0
  Size of this header:               64(bytes)
  Size of program headers:           56(bytes)
  Number of program headers:         9
  Size of section headers:           64 (bytes)
  Number of section headers:         30
  Section header string table index: 29

Implementation Details

The program is written in Rust and uses the standard libraries for file I/O and command-line argument parsing but no crates. The ELF header structure and constants are based on the ELF64 specification.