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81 lines
3.7 KiB
HTML
81 lines
3.7 KiB
HTML
4 years ago
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<html lang="en">
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<head>
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<title>Org - Using as</title>
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<meta http-equiv="Content-Type" content="text/html">
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<meta name="description" content="Using as">
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<meta name="generator" content="makeinfo 4.13">
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<link title="Top" rel="start" href="index.html#Top">
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<link rel="up" href="Pseudo-Ops.html#Pseudo-Ops" title="Pseudo Ops">
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<link rel="prev" href="Offset.html#Offset" title="Offset">
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<link rel="next" href="P2align.html#P2align" title="P2align">
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<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
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<!--
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This file documents the GNU Assembler "as".
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Copyright (C) 1991-2015 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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<meta http-equiv="Content-Style-Type" content="text/css">
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<style type="text/css"><!--
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pre.display { font-family:inherit }
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pre.format { font-family:inherit }
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pre.smalldisplay { font-family:inherit; font-size:smaller }
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pre.smallformat { font-family:inherit; font-size:smaller }
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pre.smallexample { font-size:smaller }
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pre.smalllisp { font-size:smaller }
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span.sc { font-variant:small-caps }
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span.roman { font-family:serif; font-weight:normal; }
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span.sansserif { font-family:sans-serif; font-weight:normal; }
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--></style>
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</head>
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<body>
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<div class="node">
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<a name="Org"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="P2align.html#P2align">P2align</a>,
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Previous: <a rel="previous" accesskey="p" href="Offset.html#Offset">Offset</a>,
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Up: <a rel="up" accesskey="u" href="Pseudo-Ops.html#Pseudo-Ops">Pseudo Ops</a>
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<hr>
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</div>
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<h3 class="section">7.64 <code>.org </code><var>new-lc</var><code> , </code><var>fill</var></h3>
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<p><a name="index-g_t_0040code_007borg_007d-directive-420"></a><a name="index-location-counter_002c-advancing-421"></a><a name="index-advancing-location-counter-422"></a><a name="index-current-address_002c-advancing-423"></a>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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<samp><span class="command">as</span></samp> 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><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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<!-- double negative used below "not undefined" because this is a specific -->
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<!-- reference to "undefined" (as SEG_UNKNOWN is called in this manual) -->
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<!-- section. doc@cygnus.com 18feb91 -->
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<p>Because <samp><span class="command">as</span></samp> 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>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>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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</body></html>
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