ELF, Linker & Loader Explained: From Executable to Running Program | OS Lecture 03 Part 3 | Semly
Welcome to Lecture 03 – Part 3 of the Operating Systems (OS) series on Semly.
In this lecture, we connect the pieces together and understand the relationship between the ELF format, linker, and loader.
You’ll learn what happens after compilation and linking, how an executable is prepared for execution, and how the loader uses information from the ELF file to load a program into memory.
We also connect concepts such as object files, executable files, program headers, segments, virtual memory, dynamic linking, and process startup to explain the complete journey:
Source Code → Object File → Linker → ELF Executable → Loader → Running Process
This lecture brings together the concepts covered throughout the compilation, linking, and ELF topics and gives you a clear picture of how a program ultimately becomes a running process.
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