One of the most interesting things about the Windows Subsystem for Linux (WSL) is its ability to run unmodified Linux ELF64 binaries atop the Windows Kernel.

“How?” is a question we receive regularly from many of you. Ask and ye shall receive 🙂

In this new post, Stephen Hufnagel explains to Seth Juarez how WSL System Calls (syscalls) work, transitioning user-mode calls to kernel-mode handler & subsequent dispatch, and back again.

Enjoy!