CheriBSD extends FreeBSD to implement memory protection and software compartmentalization features supported by the CHERI ISA. CheriBSD includes support for CHERI extensions to the Armv8-A (via Morello) and RISC-V architectures. To build and run CheriBSD we recommend using the cheribuild script.
For information on our branching model, updates, and flag days, please read CHERI-UPDATING.md.
The CheriBSD web page can be found here: http://www.cl.cam.ac.uk/research/security/ctsrd/cheri/cheribsd.html
The Qemu-CHERI web page may also be useful: http://www.cl.cam.ac.uk/research/security/ctsrd/cheri/cheri-qemu.html
More information about CHERI can be found on http://cheri-cpu.org and in the following Technical Reports:
An Introduction to CHERI https://www.cl.cam.ac.uk/techreports/UCAM-CL-TR-941.pdf
Capability Hardware Enhanced RISC Instructions: CHERI Instruction-Set Architecture https://www.cl.cam.ac.uk/techreports/UCAM-CL-TR-927.pdf
CHERI C/C++ Programming Guide https://www.cl.cam.ac.uk/techreports/UCAM-CL-TR-947.pdf
This is the top level of the FreeBSD source directory.
FreeBSD is an operating system used to power modern servers, desktops, and embedded platforms. A large community has continually developed it for more than thirty years. Its advanced networking, security, and storage features have made FreeBSD the platform of choice for many of the busiest web sites and most pervasive embedded networking and storage devices.
For copyright information, please see the file COPYRIGHT in this directory. Additional copyright information also exists for some sources in this tree - please see the specific source directories for more information.
The Makefile in this directory supports a number of targets for building components (or all) of the FreeBSD source tree. See build(7), config(8), FreeBSD handbook on building userland, and Handbook for kernels for more information, including setting make(1) variables.
For information on the CPU architectures and platforms supported by FreeBSD, see the FreeBSD website's Platforms page.
| Directory | Description |
|---|---|
| bin | System/user commands. |
| cddl | Various commands and libraries under the Common Development and Distribution License. |
| contrib | Packages contributed by 3rd parties. |
| crypto | Cryptography stuff (see crypto/README). |
| etc | Template files for /etc. |
| gnu | Commands and libraries under the GNU General Public License (GPL) or Lesser General Public License (LGPL). Please see gnu/COPYING and gnu/COPYING.LIB for more information. |
| include | System include files. |
| kerberos5 | Kerberos5 (Heimdal) package. |
| lib | System libraries. |
| libexec | System daemons. |
| release | Release building Makefile & associated tools. |
| rescue | Build system for statically linked /rescue utilities. |
| sbin | System commands. |
| secure | Cryptographic libraries and commands. |
| share | Shared resources. |
| stand | Boot loader sources. |
| sys | Kernel sources (see sys/README.md). |
| targets | Support for experimental DIRDEPS_BUILD |
| tests | Regression tests which can be run by Kyua. See tests/README for additional information. |
| tools | Utilities for regression testing and miscellaneous tasks. |
| usr.bin | User commands. |
| usr.sbin | System administration commands. |
For information on synchronizing your source tree with one or more of the FreeBSD Project's development branches, please see FreeBSD Handbook.