This article explains the drawbacks of static linking, introduces dynamic linking concepts such as position‑independent code, load‑time relocation, GOT/PLT mechanisms, and demonstrates how to build and use shared libraries with gcc, readelf, and the dlopen API.
This article explains the principles and step‑by‑step implementation of application hot‑patching on Linux, showing how to compile a patch library, use a loader with ptrace and dlopen to inject it into a running process, and verify the change without restarting the service.
The article outlines a systematic method for structuring native‑layer code and using dlopen, dlsym, and dlclose to dynamically load and unload .so libraries on Android, enabling selective loading, reduced memory usage, hot‑fix updates, and solutions to STL version, permission, and C++ name‑mangling challenges.
This guide walks through the ELF format, the compilation‑assembly‑linking pipeline, and step‑by‑step creation and usage of static (.a) and dynamic (.so) libraries on Linux, including gcc, ar, ldconfig, ldd and runtime loading with dlopen.
