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106 lines
4.5 KiB
HTML
106 lines
4.5 KiB
HTML
4 years ago
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- This file documents the GNU Assembler "as".
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Copyright (C) 1991-2019 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3
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or any later version published by the Free Software Foundation;
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with no Invariant Sections, with no Front-Cover Texts, and with no
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Back-Cover Texts. A copy of the license is included in the
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section entitled "GNU Free Documentation License".
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-->
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>Org (Using as)</title>
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<meta name="description" content="Org (Using as)">
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<meta name="keywords" content="Org (Using as)">
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<meta name="resource-type" content="document">
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<meta name="distribution" content="global">
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<meta name="Generator" content="makeinfo">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="AS-Index.html#AS-Index" rel="index" title="AS Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Pseudo-Ops.html#Pseudo-Ops" rel="up" title="Pseudo Ops">
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<link href="P2align.html#P2align" rel="next" title="P2align">
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<link href="Offset.html#Offset" rel="prev" title="Offset">
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<style type="text/css">
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<!--
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a.summary-letter {text-decoration: none}
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blockquote.indentedblock {margin-right: 0em}
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blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
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blockquote.smallquotation {font-size: smaller}
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div.display {margin-left: 3.2em}
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div.example {margin-left: 3.2em}
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div.lisp {margin-left: 3.2em}
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div.smalldisplay {margin-left: 3.2em}
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div.smallexample {margin-left: 3.2em}
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div.smalllisp {margin-left: 3.2em}
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kbd {font-style: oblique}
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pre.display {font-family: inherit}
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pre.format {font-family: inherit}
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pre.menu-comment {font-family: serif}
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pre.menu-preformatted {font-family: serif}
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pre.smalldisplay {font-family: inherit; font-size: smaller}
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pre.smallexample {font-size: smaller}
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pre.smallformat {font-family: inherit; font-size: smaller}
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pre.smalllisp {font-size: smaller}
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span.nolinebreak {white-space: nowrap}
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span.roman {font-family: initial; font-weight: normal}
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span.sansserif {font-family: sans-serif; font-weight: normal}
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ul.no-bullet {list-style: none}
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-->
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</style>
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</head>
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<body lang="en">
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<a name="Org"></a>
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<div class="header">
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<p>
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Next: <a href="P2align.html#P2align" accesskey="n" rel="next">P2align</a>, Previous: <a href="Offset.html#Offset" accesskey="p" rel="prev">Offset</a>, Up: <a href="Pseudo-Ops.html#Pseudo-Ops" accesskey="u" rel="up">Pseudo Ops</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="AS-Index.html#AS-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="g_t_002eorg-new_002dlc-_002c-fill"></a>
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<h3 class="section">7.68 <code>.org <var>new-lc</var> , <var>fill</var></code></h3>
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<a name="index-org-directive"></a>
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<a name="index-location-counter_002c-advancing"></a>
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<a name="index-advancing-location-counter"></a>
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<a name="index-current-address_002c-advancing"></a>
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<p>Advance the location counter of the current section to
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<var>new-lc</var>. <var>new-lc</var> is either an absolute expression or an
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expression with the same section as the current subsection. That is,
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you can’t use <code>.org</code> to cross sections: if <var>new-lc</var> has the
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wrong section, the <code>.org</code> directive is ignored. To be compatible
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with former assemblers, if the section of <var>new-lc</var> is absolute,
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<code>as</code> issues a warning, then pretends the section of <var>new-lc</var>
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is the same as the current subsection.
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</p>
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<p><code>.org</code> may only increase the location counter, or leave it
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unchanged; you cannot use <code>.org</code> to move the location counter
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backwards.
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</p>
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<p>Because <code>as</code> tries to assemble programs in one pass, <var>new-lc</var>
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may not be undefined. If you really detest this restriction we eagerly await
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a chance to share your improved assembler.
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</p>
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<p>Beware that the origin is relative to the start of the section, not
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to the start of the subsection. This is compatible with other
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people’s assemblers.
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</p>
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<p>When the location counter (of the current subsection) is advanced, the
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intervening bytes are filled with <var>fill</var> which should be an
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absolute expression. If the comma and <var>fill</var> are omitted,
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<var>fill</var> defaults to zero.
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</p>
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</body>
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</html>
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