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Functions of System calls

Show what are the different functions of System calls?

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Following are the different functions of System calls:-

a.    In this the system calls are used to read the process then allow the handler to take the action over it.

b.    It allows to perform the processing of the event as well as the handler to save the state of CPU.

c.    It can also be used to re-establish the state of the Central Processing Unit (CPU) by switching back to that of the user mode and let the CPU resume the execution of the program.

d.    The system call, calls the Windows API i.e. in functional state and its triggers can interrupt that makes the switch from CPU to kernel mode.

e.    It executes the API function that processes the event and switches back to the user mode.

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