system call

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System call
In computing, a system call is the mechanism used by an application program to request service from the operating system.
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WordNet 2.0 DictionaryDownload this dictionary
system call
Noun
1. an instruction that interrupts the program being executed and passes control to the supervisor
(synonym) supervisor call instruction
(hypernym) call



FOLDOC DictionaryDownload this dictionary
system call
<operating system, programming> The mechanism used by an application program to request service from the operating system. System calls often use a special machine code instruction which causes the processor to change mode (e.g. to "supervisor mode" or "protected mode"). This allows the OS to perform restricted actions such as accessing hardware devices or the memory management unit.
(1995-03-01)


(c) Copyright 1993 by Denis Howe

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