92 lines
3.6 KiB
HTML
92 lines
3.6 KiB
HTML
<html lang="en">
|
|
<head>
|
|
<title>Previous - Using as</title>
|
|
<meta http-equiv="Content-Type" content="text/html">
|
|
<meta name="description" content="Using as">
|
|
<meta name="generator" content="makeinfo 4.7">
|
|
<link title="Top" rel="start" href="index.html#Top">
|
|
<link rel="up" href="Pseudo-Ops.html#Pseudo-Ops" title="Pseudo Ops">
|
|
<link rel="prev" href="PopSection.html#PopSection" title="PopSection">
|
|
<link rel="next" href="Print.html#Print" title="Print">
|
|
<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
|
|
<!--
|
|
This file documents the GNU Assembler "as".
|
|
|
|
Copyright (C) 1991, 92, 93, 94, 95, 96, 97, 98, 99, 2000, 2001, 2002,
|
|
2006, 2007 Free Software Foundation, Inc.
|
|
|
|
Permission is granted to copy, distribute and/or modify this document
|
|
under the terms of the GNU Free Documentation License, Version 1.1
|
|
or any later version published by the Free Software Foundation;
|
|
with no Invariant Sections, with no Front-Cover Texts, and with no
|
|
Back-Cover Texts. A copy of the license is included in the
|
|
section entitled ``GNU Free Documentation License''.
|
|
|
|
man end-->
|
|
<meta http-equiv="Content-Style-Type" content="text/css">
|
|
<style type="text/css"><!--
|
|
pre.display { font-family:inherit }
|
|
pre.format { font-family:inherit }
|
|
pre.smalldisplay { font-family:inherit; font-size:smaller }
|
|
pre.smallformat { font-family:inherit; font-size:smaller }
|
|
pre.smallexample { font-size:smaller }
|
|
pre.smalllisp { font-size:smaller }
|
|
span.sc { font-variant:small-caps }
|
|
span.roman { font-family: serif; font-weight: normal; }
|
|
--></style>
|
|
</head>
|
|
<body>
|
|
<div class="node">
|
|
<p>
|
|
<a name="Previous"></a>Next: <a rel="next" accesskey="n" href="Print.html#Print">Print</a>,
|
|
Previous: <a rel="previous" accesskey="p" href="PopSection.html#PopSection">PopSection</a>,
|
|
Up: <a rel="up" accesskey="u" href="Pseudo-Ops.html#Pseudo-Ops">Pseudo Ops</a>
|
|
<hr><br>
|
|
</div>
|
|
|
|
<h3 class="section">7.83 <code>.previous</code></h3>
|
|
|
|
<p><a name="index-_0040code_007bprevious_007d-directive-416"></a><a name="index-Section-Stack-417"></a>This is one of the ELF section stack manipulation directives. The others are
|
|
<code>.section</code> (see <a href="Section.html#Section">Section</a>), <code>.subsection</code> (see <a href="SubSection.html#SubSection">SubSection</a>),
|
|
<code>.pushsection</code> (see <a href="PushSection.html#PushSection">PushSection</a>), and <code>.popsection</code>
|
|
(see <a href="PopSection.html#PopSection">PopSection</a>).
|
|
|
|
<p>This directive swaps the current section (and subsection) with most recently
|
|
referenced section/subsection pair prior to this one. Multiple
|
|
<code>.previous</code> directives in a row will flip between two sections (and their
|
|
subsections). For example:
|
|
|
|
<pre class="smallexample"> .section A
|
|
.subsection 1
|
|
.word 0x1234
|
|
.subsection 2
|
|
.word 0x5678
|
|
.previous
|
|
.word 0x9abc
|
|
</pre>
|
|
<p>Will place 0x1234 and 0x9abc into subsection 1 and 0x5678 into subsection 2 of
|
|
section A. Whilst:
|
|
|
|
<pre class="smallexample"> .section A
|
|
.subsection 1
|
|
# Now in section A subsection 1
|
|
.word 0x1234
|
|
.section B
|
|
.subsection 0
|
|
# Now in section B subsection 0
|
|
.word 0x5678
|
|
.subsection 1
|
|
# Now in section B subsection 1
|
|
.word 0x9abc
|
|
.previous
|
|
# Now in section B subsection 0
|
|
.word 0xdef0
|
|
</pre>
|
|
<p>Will place 0x1234 into section A, 0x5678 and 0xdef0 into subsection 0 of
|
|
section B and 0x9abc into subsection 1 of section B.
|
|
|
|
<p>In terms of the section stack, this directive swaps the current section with
|
|
the top section on the section stack.
|
|
|
|
</body></html>
|
|
|