Using Libraries

The operating system provides libraries that can be used by kernel extensions.

libcsys Library
The libcsys.a library contains a subset of subroutines found in the user-mode libc.a library that can be used by kernel extensions.
libsys Library
The libsys.a library provides the following set of kernel services:
User-provided Libraries
To simplify the development of kernel extensions, you can choose to split a kernel extension into separately loadable modules. These modules can be used when linking kernel extensions in the same way that they are used when developing user-level applications and shared objects.

Parent topic: Understanding Kernel Extension Symbol Resolution

Related concepts

System Calls