115 lines
5.1 KiB
HTML
115 lines
5.1 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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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 or
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(see below). A copy of the license is included in the section entitled
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"GNU Free Documentation License".
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(a) The FSF's Front-Cover Text is:
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A GNU Manual
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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 the GNU Compiler Collection (GCC): RL78 Function Attributes</title>
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<meta name="description" content="Using the GNU Compiler Collection (GCC): RL78 Function Attributes">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Option-Index.html#Option-Index" rel="index" title="Option Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Function-Attributes.html#Function-Attributes" rel="up" title="Function Attributes">
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<link href="RX-Function-Attributes.html#RX-Function-Attributes" rel="next" title="RX Function Attributes">
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<link href="PowerPC-Function-Attributes.html#PowerPC-Function-Attributes" rel="prev" title="PowerPC Function Attributes">
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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="RL78-Function-Attributes"></a>
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<div class="header">
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<p>
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Next: <a href="RX-Function-Attributes.html#RX-Function-Attributes" accesskey="n" rel="next">RX Function Attributes</a>, Previous: <a href="PowerPC-Function-Attributes.html#PowerPC-Function-Attributes" accesskey="p" rel="prev">PowerPC Function Attributes</a>, Up: <a href="Function-Attributes.html#Function-Attributes" accesskey="u" rel="up">Function Attributes</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="RL78-Function-Attributes-1"></a>
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<h4 class="subsection">6.31.24 RL78 Function Attributes</h4>
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<p>These function attributes are supported by the RL78 back end:
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</p>
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<dl compact="compact">
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<dt><code>interrupt</code></dt>
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<dt><code>brk_interrupt</code></dt>
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<dd><a name="index-interrupt-function-attribute_002c-RL78"></a>
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<a name="index-brk_005finterrupt-function-attribute_002c-RL78"></a>
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<p>These attributes indicate
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that the specified function is an interrupt handler. The compiler generates
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function entry and exit sequences suitable for use in an interrupt handler
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when this attribute is present.
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</p>
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<p>Use <code>brk_interrupt</code> instead of <code>interrupt</code> for
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handlers intended to be used with the <code>BRK</code> opcode (i.e. those
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that must end with <code>RETB</code> instead of <code>RETI</code>).
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</p>
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</dd>
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<dt><code>naked</code></dt>
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<dd><a name="index-naked-function-attribute_002c-RL78"></a>
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<p>This attribute allows the compiler to construct the
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requisite function declaration, while allowing the body of the
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function to be assembly code. The specified function will not have
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prologue/epilogue sequences generated by the compiler. Only basic
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<code>asm</code> statements can safely be included in naked functions
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(see <a href="Basic-Asm.html#Basic-Asm">Basic Asm</a>). While using extended <code>asm</code> or a mixture of
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basic <code>asm</code> and C code may appear to work, they cannot be
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depended upon to work reliably and are not supported.
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</p></dd>
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</dl>
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</body>
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</html>
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