115 lines
5.1 KiB
HTML
115 lines
5.1 KiB
HTML
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<title>Using the GNU Compiler Collection (GCC): RL78 Function Attributes</title>
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<a name="RL78-Function-Attributes"></a>
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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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<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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