This directory contains the source files and build glue that make up the FreeBSD kernel and its modules, including both original and contributed software.
| Directory | Description |
|---|---|
| amd64 | AMD64 architecture support |
| arm | ARM architecture support |
| arm64 | ARMv8 architecture support |
| cam | cam(4) and ctl(4) |
| cddl | CDDL-licensed optional sources, including ZFS and DTrace |
| ddb | ddb(4) |
| fs | most filesystems |
| dev | device drivers |
| geom | geom(4) |
| i386 | i386 (32 bit) architecture support |
| kern | main part of the kernel |
| net80211 | net80211(4) |
| netgraph | netgraph(4) |
| netinet | inet(4) |
| netinet6 | inet6(4) |
| netipsec | ipsec(4) |
| netpfil | ipfw(4) and pf(4) |
| opencrypto | crypto(7) |
| powerpc | PowerPC/POWER architecture support |
| riscv | RISC-V architecture support |
| security | audit(4) and mac(4) |
| sys | kernel headers |
| ufs | Unix File System |
| x86 | code shared by AMD64 and i386 architectures |