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 12Source Roadmap: 13--------------- 14| Directory | Description | 15| --------- | ----------- | 16| amd64 | AMD64 (64-bit x86) architecture support | 17| arm | 32-bit ARM architecture support | 18| arm64 | 64-bit ARM (AArch64) architecture support | 19| cam | Common Access Method storage subsystem - `cam(4)` and `ctl(4)` | 20| cddl | CDDL-licensed optional sources such as DTrace | 21| conf | kernel build glue | 22| compat | Linux compatibility layer, FreeBSD 32-bit compatibility | 23| contrib | 3rd-party imported software such as OpenZFS | 24| crypto | crypto drivers | 25| ddb | interactive kernel debugger - `ddb(4)` | 26| fs | most filesystems, excluding UFS, NFS, and ZFS | 27| dev | device drivers and other arch independent code | 28| gdb | kernel remote GDB stub - `gdb(4)` | 29| geom | GEOM framework - `geom(4)` | 30| i386 | i386 (32-bit x86) architecture support | 31| kern | main part of the kernel | 32| libkern | libc-like and other support functions for kernel use | 33| modules | kernel module infrastructure | 34| net | core networking code | 35| net80211 | wireless networking (IEEE 802.11) - `net80211(4)` | 36| netgraph | graph-based networking subsystem - `netgraph(4)` | 37| netinet | IPv4 protocol implementation - `inet(4)` | 38| netinet6 | IPv6 protocol implementation - `inet6(4)` | 39| netipsec | IPsec protocol implementation - `ipsec(4)` | 40| netpfil | packet filters - `ipfw(4)`, `pf(4)`, and `ipfilter(4)` | 41| opencrypto | OpenCrypto framework - `crypto(7)` | 42| powerpc | PowerPC/POWER (32 and 64-bit) architecture support | 43| riscv | 64-bit RISC-V architecture support | 44| security | security facilities - `audit(4)` and `mac(4)` | 45| sys | kernel headers | 46| tests | kernel unit tests | 47| ufs | Unix File System - `ffs(7)` | 48| vm | virtual memory system | 49| x86 | code shared by AMD64 and i386 architectures | 50