Magenta Kernel, Core Drivers and Services

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  1. 8e7777f [mxio] add support for passing sockets as stdio by Toshi Kikuchi · 16 hours ago master
  2. c9cf54a [ulib][mxio][launchpad] Revamp mxio_get_vmo by Roland McGrath · 6 hours ago
  3. 99a1960 [vmo] Clean up thread safety annotations for vm_object and friends by Dave Bort · 4 days ago
  4. 1293c9d [kernel] JobDispatcher::JobEnumerator docs and cleanup by Dave Bort · 11 hours ago
  5. 19a8c8c [udev][usb-mass-storage] Report read-only and removable status via block_info_t by Mike Voydanoff · 17 hours ago


Magenta is the core platform that powers the Fuchsia OS. Magenta is composed of a microkernel (source in kernel/...) as well as a small set of userspace services, drivers, and libraries (source in system/...) necessary for the system to boot, talk to hardware, load userspace processes and run them, etc. Fuchsia builds a much larger OS on top of this foundation.

The canonical Magenta Git repository is located at:

A read-only mirror of the code is present at:

The Magenta Kernel provides syscalls to manage processes, threads, virtual memory, inter-process communication, waiting on object state changes, and locking (via futexes).

Currently there are some temporary syscalls that have been used for early bringup work, which will be going away in the future as the long term syscall API/ABI surface is finalized. The expectation is that there will be 10s, not 100s of syscalls.

Magenta syscalls are generally non-blocking. The wait (one, many, set) family of syscalls, ioport reads, and thread sleep being the notable exceptions.

This page is a non-comprehensive index of the magenta documentation.