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<!DOCTYPE HTML PUBLIC "-//W3O//DTD W3 HTML 2.0//EN"><!-- This collection of hypertext pages is Copyright 1995-2005 by Steve Summit. --><!-- Content from the book "C Programming FAQs: Frequently Asked Questions" --><!-- (Addison-Wesley, 1995, ISBN 0-201-84519-9) is made available here by --><!-- permission of the author and the publisher as a service to the community. --><!-- It is intended to complement the use of the published text --><!-- and is protected by international copyright laws. --><!-- The on-line content may be accessed freely for personal use --><!-- but may not be published or retransmitted without explicit permission. --><!-- --><!-- this page built Sat Dec 24 21:47:47 2005 by faqproc version 2.7 --><!-- from source file osdepproc.sgml dated Sat Feb 7 19:18:20 2004 --><!-- corresponding to FAQ list version 4.0 --><html><!-- Mirrored from c-faq.com/osdep/dynlink.html by HTTrack Website Copier/3.x [XR&CO'2008], Sat, 14 Mar 2009 07:59:03 GMT --><head><meta name=GENERATOR content="faqproc"><title>Question 19.36</title><link href="exitvsreturn.html" rev=precedes><link href="subsecond.html" rel=precedes><link href="index.html" rev=subdocument></head><body bgcolor="#ffffff"><a href="exitvsreturn.html" rev=precedes><img src="../images/buttonleft.gif" alt="prev"></a><a href="index.html" rev=subdocument><img src="../images/buttonup.gif" alt="up"></a><a href="subsecond.html" rel=precedes><img src="../images/buttonright.gif" alt="next"></a> <a href="../index-2.html"><img src="../images/buttontop.gif" alt="top/contents"></a><a href="../search.html"><img src="../images/buttonsrch.gif" alt="search"></a><hr><p><!-- qbegin --><h1>comp.lang.c FAQ list<font color=blue>·</font><!-- qtag -->Question 19.36</h1><p><font face=Helvetica size=8 color=blue><b>Q:</b></font>How can I read in an object file and jump tolocationsin it?</p><p><hr><p><font face=Helvetica size=8 color=blue><b>A:</b></font>You want a dynamic linker or loader.It may be possible to <TT>malloc</TT> some spaceand read in object files,but you have to know an awful lotabout object file formats, relocation, etc.,and this approach can't work if code and datareside in separate address spacesorif code is otherwise privileged.</p><p>Under BSDUnix,you could use <TT>system</TT> and <TT>ld -A</TT>to do the linking for you.Manyversions of SunOS and System Vhave the -ldl librarycontaining routines like<TT>dlopen</TT> and<TT>dlsym</TT>whichallowobject files to be dynamicallyloaded.Under VMS, use LIB$FIND_IMAGE_SYMBOL.GNUhasapackage called ``dld''.See also question<a href="../varargs/invvarargs.html">15.13</a>.</p><!-- aend --><p><hr><a href="exitvsreturn.html" rev=precedes><img src="../images/buttonleft.gif" alt="prev"></a><a href="index.html" rev=subdocument><img src="../images/buttonup.gif" alt="up"></a><a href="subsecond.html" rel=precedes><img src="../images/buttonright.gif" alt="next"></a> <a href="../questions.html"><img src="../images/buttontop.gif" alt="contents"></a><a href="../search.html"><img src="../images/buttonsrch.gif" alt="search"></a><br><!-- lastfooter --><a href="../about.html">about this FAQ list</a> <a href="../eskimo.html">about eskimo</a> <a href="../search.html">search</a> <a href="../feedback.html">feedback</a> <a href="copyright.html">copyright</a><p>Hosted by<a href="http://www.eskimo.com/"><img src="../../www.eskimo.com/img/link/eskitiny.gif" alt="Eskimo North"></a></body><!-- Mirrored from c-faq.com/osdep/dynlink.html by HTTrack Website Copier/3.x [XR&CO'2008], Sat, 14 Mar 2009 07:59:03 GMT --></html>⌨️ 快捷键说明
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