basavesh

Understanding the Memory Layout of Linux Executables

Required tools for playing around with memory:

• hexdump
• objdump
• readelf
• xxd
• gcore

basavesh

Mike's x86-64 Assembly (ASM) Notes

Assembling Binary Machine Code

Operating Modes:

These determine the assumed/default size of instruction operands, and restricts which opcodes are available, and how they are used.

Modern operating systems, booted inside Real mode,

basavesh

// demo_new_delete.cpp
#include <cstddef>
#include <new>

struct Base {
  Base();
  virtual ~Base();                 // virtual => emits D0, D1, D2
  static void* operator new(std::size_t);
  static void  operator delete(void*) noexcept;
};