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83 lines
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83 lines
3.7 KiB
HTML
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<title>Loc - Using as</title>
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<link rel="up" href="Pseudo-Ops.html#Pseudo-Ops" title="Pseudo Ops">
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<link rel="prev" href="Ln.html#Ln" title="Ln">
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<link rel="next" href="Loc_005fmark_005flabels.html#Loc_005fmark_005flabels" title="Loc_mark_labels">
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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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<a name="Loc"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="Loc_005fmark_005flabels.html#Loc_005fmark_005flabels">Loc_mark_labels</a>,
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Previous: <a rel="previous" accesskey="p" href="Ln.html#Ln">Ln</a>,
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Up: <a rel="up" accesskey="u" href="Pseudo-Ops.html#Pseudo-Ops">Pseudo Ops</a>
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<h3 class="section">7.54 <code>.loc </code><var>fileno</var> <var>lineno</var><code> [</code><var>column</var><code>] [</code><var>options</var><code>]</code></h3>
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<p><a name="index-g_t_0040code_007bloc_007d-directive-396"></a>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>The <var>options</var> are a sequence of the following tokens in any order:
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<dl>
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<dt><code>basic_block</code><dd>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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<br><dt><code>prologue_end</code><dd>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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<br><dt><code>epilogue_begin</code><dd>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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<br><dt><code>is_stmt </code><var>value</var><dd>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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<br><dt><code>isa </code><var>value</var><dd>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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<br><dt><code>discriminator </code><var>value</var><dd>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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</dl>
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</body></html>
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