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 7Source Roadmap: 8--------------- 9| Directory | Description | 10| --------- | ----------- | 11| amd64 | AMD64 (64-bit x86) architecture support | 12| arm | 32-bit ARM architecture support | 13| arm64 | 64-bit ARM (AArch64) architecture support | 14| cam | Common Access Method storage subsystem - `cam(4)` and `ctl(4)` | 15| cddl | CDDL-licensed optional sources such as DTrace | 16| conf | kernel build glue | 17| compat | Linux compatibility layer, FreeBSD 32-bit compatibility | 18| contrib | 3rd-party imported software such as OpenZFS | 19| crypto | crypto drivers | 20| ddb | interactive kernel debugger - `ddb(4)` | 21| fs | most filesystems, excluding UFS, NFS, and ZFS | 22| dev | device drivers | 23| gdb | kernel remote GDB stub - `gdb(4)` | 24| geom | GEOM framework - `geom(4)` | 25| i386 | i386 (32-bit x86) architecture support | 26| kern | main part of the kernel | 27| libkern | libc-like and other support functions for kernel use | 28| modules | kernel module infrastructure | 29| net | core networking code | 30| net80211 | wireless networking (IEEE 802.11) - `net80211(4)` | 31| netgraph | graph-based networking subsystem - `netgraph(4)` | 32| netinet | IPv4 protocol implementation - `inet(4)` | 33| netinet6 | IPv6 protocol implementation - `inet6(4)` | 34| netipsec | IPsec protocol implementation - `ipsec(4)` | 35| netpfil | packet filters - `ipfw(4)`, `pf(4)`, and `ipfilter(4)` | 36| opencrypto | OpenCrypto framework - `crypto(7)` | 37| powerpc | PowerPC/POWER (32 and 64-bit) architecture support | 38| riscv | 64-bit RISC-V architecture support | 39| security | security facilities - `audit(4)` and `mac(4)` | 40| sys | kernel headers | 41| tests | kernel unit tests | 42| ufs | Unix File System - `ffs(7)` | 43| vm | virtual memory system | 44| x86 | code shared by AMD64 and i386 architectures | 45