upcall

Noun.  (computing, programming) A call from a lower-level subsystem, such as a kernel or framework, to a higher-level subsystem, such as user code.

This is an unmodified, but possibly outdated, definition from Wiktionary and used here under the Creative Commons license. Wiktionary is a great resource. If you like it too, please donate to Wikimedia.

This entry was last updated on RefTopia from its source on 3/20/2012.