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trampoline: n. An incredibly hairy technique, found in some
HLL and program-overlay implementations (e.g., on
the Macintosh), that involves on-the-fly generation of small executable
(and, likely as not, self-modifying) code objects to do indirection between
code sections. Under BSD and possibly in other Unixes, trampoline code is
used to transfer control from the kernel back to user mode when a signal
(which has had a handler installed) is sent to a process. These pieces of
live data are called trampolines. Trampolines are notoriously
difficult to understand in action; in fact, it is said by those who use
this term that the trampoline that doesn't bend your brain is not the true
trampoline. See also snap.
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