13 lines
2.5 KiB
HTML
13 lines
2.5 KiB
HTML
<?xml version="1.0" encoding="ISO-8859-1" standalone="no"?>
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<html xmlns="http://www.w3.org/1999/xhtml"><head><title>trampoline</title><link rel="stylesheet" href="../../jargon.css" type="text/css"/><meta name="generator" content="DocBook XSL Stylesheets V1.61.0"/><link rel="home" href="../index.html" title="The Jargon File"/><link rel="up" href="../T.html" title="T"/><link rel="previous" href="toy-program.html" title="toy program"/><link rel="next" href="trap.html" title="trap"/></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">trampoline</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="toy-program.html">Prev</a> </td><th width="60%" align="center">T</th><td width="20%" align="right"> <a accesskey="n" href="trap.html">Next</a></td></tr></table><hr/></div><dt><a id="trampoline"/><dt xmlns="" id="trampoline"><b>trampoline</b>: <span xmlns="http://www.w3.org/1999/xhtml" class="grammar">n.</span></dt></dt><dd><p> An incredibly <a href="../H/hairy.html"><i class="glossterm">hairy</i></a> technique, found in some
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<a href="../H/HLL.html"><i class="glossterm">HLL</i></a> and program-overlay implementations (e.g., on
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the Macintosh), that involves on-the-fly generation of small executable
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(and, likely as not, self-modifying) code objects to do indirection between
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code sections. Under BSD and possibly in other Unixes, trampoline code is
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used to transfer control from the kernel back to user mode when a signal
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(which has had a handler installed) is sent to a process. These pieces of
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<a href="../L/live-data.html"><i class="glossterm">live data</i></a> are called <span class="firstterm">trampolines</span>. Trampolines are notoriously
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difficult to understand in action; in fact, it is said by those who use
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this term that the trampoline that doesn't bend your brain is not the true
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trampoline. See also <a href="../S/snap.html"><i class="glossterm">snap</i></a>.</p></dd><div class="navfooter"><hr/><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="toy-program.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="../T.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="trap.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">toy program </td><td width="20%" align="center"><a accesskey="h" href="../index.html">Home</a></td><td width="40%" align="right" valign="top"> trap</td></tr></table></div></body></html>
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