120 lines
4.9 KiB
HTML
120 lines
4.9 KiB
HTML
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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) 1991-2016 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 5.2, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>Using as: Loc</title>
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<meta name="description" content="Using as: Loc">
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<meta name="keywords" content="Using as: Loc">
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<meta name="resource-type" content="document">
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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="Loc_005fmark_005flabels.html#Loc_005fmark_005flabels" rel="next" title="Loc_mark_labels">
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<link href="Ln.html#Ln" rel="prev" title="Ln">
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<style type="text/css">
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-->
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</style>
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</head>
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<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
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<a name="Loc"></a>
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<div class="header">
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<p>
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Next: <a href="Loc_005fmark_005flabels.html#Loc_005fmark_005flabels" accesskey="n" rel="next">Loc_mark_labels</a>, Previous: <a href="Ln.html#Ln" accesskey="p" rel="prev">Ln</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_002eloc-fileno-lineno-_005bcolumn_005d-_005boptions_005d"></a>
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<h3 class="section">7.54 <code>.loc <var>fileno</var> <var>lineno</var> [<var>column</var>] [<var>options</var>]</code></h3>
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<a name="index-loc-directive"></a>
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<p>When emitting DWARF2 line number information,
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the <code>.loc</code> directive will add a row to the <code>.debug_line</code> line
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number matrix corresponding to the immediately following assembly
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instruction. The <var>fileno</var>, <var>lineno</var>, and optional <var>column</var>
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arguments will be applied to the <code>.debug_line</code> state machine before
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the row is added.
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</p>
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<p>The <var>options</var> are a sequence of the following tokens in any order:
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</p>
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<dl compact="compact">
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<dt><code>basic_block</code></dt>
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<dd><p>This option will set the <code>basic_block</code> register in the
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<code>.debug_line</code> state machine to <code>true</code>.
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</p>
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</dd>
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<dt><code>prologue_end</code></dt>
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<dd><p>This option will set the <code>prologue_end</code> register in the
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<code>.debug_line</code> state machine to <code>true</code>.
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</p>
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</dd>
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<dt><code>epilogue_begin</code></dt>
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<dd><p>This option will set the <code>epilogue_begin</code> register in the
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<code>.debug_line</code> state machine to <code>true</code>.
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</p>
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</dd>
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<dt><code>is_stmt <var>value</var></code></dt>
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<dd><p>This option will set the <code>is_stmt</code> register in the
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<code>.debug_line</code> state machine to <code>value</code>, which must be
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either 0 or 1.
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</p>
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</dd>
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<dt><code>isa <var>value</var></code></dt>
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<dd><p>This directive will set the <code>isa</code> register in the <code>.debug_line</code>
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state machine to <var>value</var>, which must be an unsigned integer.
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</p>
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</dd>
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<dt><code>discriminator <var>value</var></code></dt>
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<dd><p>This directive will set the <code>discriminator</code> register in the <code>.debug_line</code>
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state machine to <var>value</var>, which must be an unsigned integer.
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</p>
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</dd>
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</dl>
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</body>
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</html>
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