115 lines
5.2 KiB
HTML
115 lines
5.2 KiB
HTML
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<title>Using the GNU Compiler Collection (GCC): H8/300 Function Attributes</title>
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Next: <a href="IA_002d64-Function-Attributes.html#IA_002d64-Function-Attributes" accesskey="n" rel="next">IA-64 Function Attributes</a>, Previous: <a href="Epiphany-Function-Attributes.html#Epiphany-Function-Attributes" accesskey="p" rel="prev">Epiphany 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="H8_002f300-Function-Attributes-1"></a>
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<h4 class="subsection">6.31.9 H8/300 Function Attributes</h4>
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<p>These function attributes are available for H8/300 targets:
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</p>
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<dl compact="compact">
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<dt><code>function_vector</code></dt>
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<dd><a name="index-function_005fvector-function-attribute_002c-H8_002f300"></a>
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<p>Use this attribute on the H8/300, H8/300H, and H8S to indicate
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that the specified function should be called through the function vector.
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Calling a function through the function vector reduces code size; however,
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the function vector has a limited size (maximum 128 entries on the H8/300
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and 64 entries on the H8/300H and H8S)
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and shares space with the interrupt vector.
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</p>
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</dd>
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<dt><code>interrupt_handler</code></dt>
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<dd><a name="index-interrupt_005fhandler-function-attribute_002c-H8_002f300"></a>
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<p>Use this attribute on the H8/300, H8/300H, and H8S to
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indicate that the specified function is an interrupt handler. The compiler
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generates function entry and exit sequences suitable for use in an
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interrupt handler when this attribute is present.
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</p>
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</dd>
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<dt><code>saveall</code></dt>
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<dd><a name="index-saveall-function-attribute_002c-H8_002f300"></a>
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<a name="index-save-all-registers-on-the-H8_002f300_002c-H8_002f300H_002c-and-H8S"></a>
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<p>Use this attribute on the H8/300, H8/300H, and H8S to indicate that
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all registers except the stack pointer should be saved in the prologue
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regardless of whether they are used or not.
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</p></dd>
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</dl>
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