This repository contains the source code of seL4 microkernel.

For details about the seL4 microkernel, including details about its formal correctness proof, please see the sel4.systems website and associated FAQ.

DOIs for citing recent releases of this repository:

We welcome contributions to seL4. Please see the website for information on how to contribute.

This repository is usually not used in isolation, but as part of the build system in a larger project.

• include and src: C and ASM source code of seL4
• tools: build tools
• libsel4: C bindings for the seL4 ABI
• manual: LaTeX sources of the seL4 reference manual

tl;dr:

TOOLPREFIX=arm-none-eabi- ARCH=arm PLAT=imx6 ARMV=armv7-a CPU=cortex-a9 \
make

The kernel source requires a cross-compiler for the target architecture. To build using make, follow these instructions:

• Ensure that the appropriate cross-compiler for your target architecture is installed.

• Set the TOOLPREFIX environment variable to your cross-compiler's prefix. E.g. arm-none-eabi-.

• Set the ARCH, PLAT, ARMV and CPU variables for the intended target architecture and platform, chosen from the following lists:

  ARCH	PLAT	ARMV	CPU
  arm	imx31	armv6	arm1136jf-s
  arm	omap3	armv7-a	cortex-a8
  arm	am335x	armv7-a	cortex-a8
  arm	imx6	armv7-a	cortex-a9
  ia32	pc99

• For a debug build, append DEBUG=y and to see serial output additionally append CONFIG_KERNEL_EXTRA_CPPFLAGS="-DCONFIG_PRINTING=y -DCONFIG_USER_STACK_TRACE_LENGTH=16".

See the seL4 website for more comprehensive build instructions.

The files in this repository are released under standard open source licenses. Please see the individual file headers and LICENSE_GPLv2.txt and LICENSE_BSD2.txt files for details.