1FreeBSD Kernel Source: 2---------------------- 3 4This directory contains the source files and build glue that make up the FreeBSD 5kernel and its modules, including both original and contributed software. 6 7Kernel configuration files are located in the `conf/` subdirectory of each 8architecture. `GENERIC` is the configuration used in release builds. `NOTES` 9contains documentation of all possible entries. `LINT` is a compile-only 10configuration used to maximize build coverage and detect regressions. 11 12Documentation: 13-------------- 14 15Source code documentation is maintained in a set of man pages, under section 9. 16These pages are located in [`share/man/man9`](../share/man/man9), from the 17top-level of the src tree. Consult [`intro(9)`](https://man.freebsd.org/intro/9) 18for an overview of existing pages. 19 20Some additional high-level documentation of the kernel is maintained in the 21[Architecture Handbook](https://docs.freebsd.org/en/books/arch-handbook/). 22 23Source Roadmap: 24--------------- 25| Directory | Description | 26| --------- | ----------- | 27| amd64 | AMD64 (64-bit x86) architecture support | 28| arm | 32-bit ARM architecture support | 29| arm64 | 64-bit ARM (AArch64) architecture support | 30| cam | Common Access Method storage subsystem - `cam(4)` and `ctl(4)` | 31| cddl | CDDL-licensed optional sources such as DTrace | 32| conf | kernel build glue | 33| compat | Linux compatibility layer, FreeBSD 32-bit compatibility | 34| contrib | 3rd-party imported software such as OpenZFS | 35| crypto | crypto drivers | 36| ddb | interactive kernel debugger - `ddb(4)` | 37| fs | most filesystems, excluding UFS, NFS, and ZFS | 38| dev | device drivers and other arch independent code | 39| gdb | kernel remote GDB stub - `gdb(4)` | 40| geom | GEOM framework - `geom(4)` | 41| i386 | i386 (32-bit x86) architecture support | 42| kern | main part of the kernel | 43| libkern | libc-like and other support functions for kernel use | 44| modules | kernel module infrastructure | 45| net | core networking code | 46| net80211 | wireless networking (IEEE 802.11) - `net80211(4)` | 47| netgraph | graph-based networking subsystem - `netgraph(4)` | 48| netinet | IPv4 protocol implementation - `inet(4)` | 49| netinet6 | IPv6 protocol implementation - `inet6(4)` | 50| netipsec | IPsec protocol implementation - `ipsec(4)` | 51| netpfil | packet filters - `ipfw(4)`, `pf(4)`, and `ipfilter(4)` | 52| opencrypto | OpenCrypto framework - `crypto(7)` | 53| powerpc | PowerPC/POWER (32 and 64-bit) architecture support | 54| riscv | 64-bit RISC-V architecture support | 55| security | security facilities - `audit(4)` and `mac(4)` | 56| sys | kernel headers | 57| tests | kernel unit tests | 58| ufs | Unix File System - `ffs(4)` | 59| vm | virtual memory system | 60| x86 | code shared by AMD64 and i386 architectures | 61