Table of Contents

• Loading and Executing Binary
• Compilation
• Registers
• Linnker ket
• Static and Dynamic Libraries
• The ELF Format
• Components of ELF

---

Slides: Intro to binary analysis, elf

---

Loading and Executing Binary

• Modern linux has randomised memory addresses for security purposes

• Lazy-binding -> Only load program when needed

Compilation

• Human-readable source code -> machine code
• Steps:
  • Preprocessing
  • Compilation
  • Assembly
  • Linking

Registers

• R start -> 64 bit

E start -> 32 bit

Linnker ket

Resolev binary executables Extra optimisation pass

• Relocation symboks, show how functions arnd variable references eventually side :

Static and Dynamic Libraries

• Stuff back gets archived for fut 4 fun learning
  • Can strip memoyr bammping between souce, lines and binary

---

asmtutors.com for x86 assembly

---

The ELF Format

• ELF -> Executable and Linkable Format
  • Default binary format on Linux-based systems
  • Used for executable files, object files, shared libraries and core dumps

Components of ELF

• Executable headers
• Program headers (optional) -> used by linker
• Sections
• Section headers (optional) -> used by linker