84 lines
3.9 KiB
HTML
84 lines
3.9 KiB
HTML
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Contributed by Cygnus Support. Written by Julia Menapace, Jim Kingdon,
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<title>STABS: Reference Parameters</title>
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<link href="Symbol-Types-Index.html#Symbol-Types-Index" rel="index" title="Symbol Types Index">
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<a name="Reference-Parameters"></a>
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<p>
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Next: <a href="Conformant-Arrays.html#Conformant-Arrays" accesskey="n" rel="next">Conformant Arrays</a>, Previous: <a href="Local-Variable-Parameters.html#Local-Variable-Parameters" accesskey="p" rel="prev">Local Variable Parameters</a>, Up: <a href="Parameters.html#Parameters" accesskey="u" rel="up">Parameters</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Symbol-Types-Index.html#Symbol-Types-Index" title="Index" rel="index">Index</a>]</p>
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<hr>
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<a name="Passing-Parameters-by-Reference"></a>
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<h4 class="subsection">4.7.3 Passing Parameters by Reference</h4>
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<p>If the parameter is passed by reference (e.g., Pascal <code>VAR</code>
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parameters), then the symbol descriptor is ‘<samp>v</samp>’ if it is in the
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argument list, or ‘<samp>a</samp>’ if it in a register. Other than the fact
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that these contain the address of the parameter rather than the
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parameter itself, they are identical to ‘<samp>p</samp>’ and ‘<samp>R</samp>’,
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respectively. I believe ‘<samp>a</samp>’ is an AIX invention; ‘<samp>v</samp>’ is
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supported by all stabs-using systems as far as I know.
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</p>
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