Curated source guide

glibc source explorer

Explore the GNU C Library (glibc) source code. Study standard C library implementations, system calls, POSIX compliance, and C runtime behavior.

Guide chapters

1. Chapter 1 — Introduction to glibc
2. Chapter 2 — System Call Interface
3. Chapter 3 — Memory Management Deep Dive
4. Chapter 4 — String and Memory Functions
5. Chapter 5 — Dynamic Linker and ELF Startup
6. Chapter 6 — Threads, Futexes, and TLS

Key directories

• manual/ — glibc manual source
• sysdeps/aarch64/ — Program startup — _start assembly entry point
• csu/ — __libc_start_main — sets up runtime and calls main()
• sysdeps/unix/sysv/linux/aarch64/ — AArch64 syscall assembly wrapper
• stdio-common/ — Core printf formatting (about 1,570 lines)
• elf/ — Dynamic linker / runtime loader (about 3,000 lines)