This directory contains the source files and build glue that make up the FreeBSD
kernel and its modules, including both original and contributed software.
Kernel configuration files are located in the conf/ subdirectory of each
architecture. GENERIC is the configuration used in release builds. NOTES
contains documentation of all possible entries. LINT is a compile-only
configuration used to maximize build coverage and detect regressions.
Source Roadmap:
Directory
Description
amd64
AMD64 (64-bit x86) architecture support
arm
32-bit ARM architecture support
arm64
64-bit ARM (AArch64) architecture support
cam
Common Access Method storage subsystem - cam(4) and ctl(4)
cddl
CDDL-licensed optional sources such as DTrace
conf
kernel build glue
compat
Linux compatibility layer, FreeBSD 32-bit compatibility
contrib
3rd-party imported software such as OpenZFS
crypto
crypto drivers
ddb
interactive kernel debugger - ddb(4)
fs
most filesystems, excluding UFS, NFS, and ZFS
dev
device drivers and other arch independent code
gdb
kernel remote GDB stub - gdb(4)
geom
GEOM framework - geom(4)
i386
i386 (32-bit x86) architecture support
kern
main part of the kernel
libkern
libc-like and other support functions for kernel use
modules
kernel module infrastructure
net
core networking code
net80211
wireless networking (IEEE 802.11) - net80211(4)
netgraph
graph-based networking subsystem - netgraph(4)
netinet
IPv4 protocol implementation - inet(4)
netinet6
IPv6 protocol implementation - inet6(4)
netipsec
IPsec protocol implementation - ipsec(4)
netpfil
packet filters - ipfw(4), pf(4), and ipfilter(4)
opencrypto
OpenCrypto framework - crypto(7)
powerpc
PowerPC/POWER (32 and 64-bit) architecture support
