4.10 Subsystem Management Functions
Subsystems consist of extended SVC handlers, break functions, startup functions, cleanup functions,
event functions, and resource control blocks. SVC handlers (Figure4.14).
An extended SVC handler accepts requests from applications and other programs as an application
programming interface (API) for a subsystem.
A break function, a startup function, a cleanup function, and an event function accept requests from
OS.
Figure 4.14: T-Kernel Subsystems
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