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<title>Debugging with GDB: Predefined Target Types</title>
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<a name="Predefined-Target-Types"></a>
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Next: <a href="Enum-Target-Types.html#Enum-Target-Types" accesskey="n" rel="next">Enum Target Types</a>, Previous: <a href="Target-Description-Format.html#Target-Description-Format" accesskey="p" rel="previous">Target Description Format</a>, Up: <a href="Target-Descriptions.html#Target-Descriptions" accesskey="u" rel="up">Target Descriptions</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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<a name="Predefined-Target-Types-1"></a>
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<h3 class="section">G.3 Predefined Target Types</h3>
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<a name="index-target-descriptions_002c-predefined-types"></a>
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<p>Type definitions in the self-description can build up composite types
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from basic building blocks, but can not define fundamental types. Instead,
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standard identifiers are provided by <small>GDB</small> for the fundamental
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types. The currently supported types are:
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</p>
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<dl compact="compact">
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<dt><code>bool</code></dt>
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<dd><p>Boolean type, occupying a single bit.
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</p>
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</dd>
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<dt><code>int8</code></dt>
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<dt><code>int16</code></dt>
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<dt><code>int24</code></dt>
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<dt><code>int32</code></dt>
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<dt><code>int64</code></dt>
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<dt><code>int128</code></dt>
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<dd><p>Signed integer types holding the specified number of bits.
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</p>
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</dd>
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<dt><code>uint8</code></dt>
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<dt><code>uint16</code></dt>
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<dt><code>uint24</code></dt>
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<dt><code>uint32</code></dt>
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<dt><code>uint64</code></dt>
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<dt><code>uint128</code></dt>
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<dd><p>Unsigned integer types holding the specified number of bits.
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</p>
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</dd>
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<dt><code>code_ptr</code></dt>
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<dt><code>data_ptr</code></dt>
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<dd><p>Pointers to unspecified code and data. The program counter and
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any dedicated return address register may be marked as code
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pointers; printing a code pointer converts it into a symbolic
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address. The stack pointer and any dedicated address registers
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may be marked as data pointers.
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</p>
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</dd>
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<dt><code>ieee_single</code></dt>
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<dd><p>Single precision IEEE floating point.
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</p>
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</dd>
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<dt><code>ieee_double</code></dt>
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<dd><p>Double precision IEEE floating point.
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</p>
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</dd>
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<dt><code>arm_fpa_ext</code></dt>
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<dd><p>The 12-byte extended precision format used by ARM FPA registers.
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</p>
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</dd>
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<dt><code>i387_ext</code></dt>
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<dd><p>The 10-byte extended precision format used by x87 registers.
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</p>
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</dd>
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<dt><code>i386_eflags</code></dt>
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<dd><p>32bit <small>EFLAGS</small> register used by x86.
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</p>
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</dd>
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<dt><code>i386_mxcsr</code></dt>
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<dd><p>32bit <small>MXCSR</small> register used by x86.
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</p>
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</dd>
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