Bare-Metal HTTP Server in x86_64 Assembly: sys_sendfile Zero-Copy, Raw Sockets & Path Traversal Prevention | No libc
Every HTTP server abstraction collapses to the same syscall chain: socket → bind → listen → accept → read → sendfile → close. In pure x86_64 Assembly, each step is explicit: bswap converts port to network byte order, SCASB/LODSB scans the GET request path byte-by-byte for ../ traversal sequences, sys_fstat retrieves exact file size for sys_sendfile, sys_sendfile(40) transfers file data directly from disk to NIC via kernel space — zero user-space copy, zero libc, zero external libraries. Full source on GitHub.
