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<title>Debugging with GDB: Standard Target Features</title>
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<a name="Standard-Target-Features"></a>
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<p>
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Previous: <a href="Enum-Target-Types.html#Enum-Target-Types" accesskey="p" rel="previous">Enum Target Types</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="Standard-Target-Features-1"></a>
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<h3 class="section">G.5 Standard Target Features</h3>
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<a name="index-target-descriptions_002c-standard-features"></a>
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<p>A target description must contain either no registers or all the
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target’s registers. If the description contains no registers, then
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<small>GDB</small> will assume a default register layout, selected based on
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the architecture. If the description contains any registers, the
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default layout will not be used; the standard registers must be
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described in the target description, in such a way that <small>GDB</small>
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can recognize them.
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</p>
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<p>This is accomplished by giving specific names to feature elements
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which contain standard registers. <small>GDB</small> will look for features
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with those names and verify that they contain the expected registers;
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if any known feature is missing required registers, or if any required
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feature is missing, <small>GDB</small> will reject the target
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description. You can add additional registers to any of the
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standard features — <small>GDB</small> will display them just as if
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they were added to an unrecognized feature.
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</p>
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<p>This section lists the known features and their expected contents.
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Sample XML documents for these features are included in the
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<small>GDB</small> source tree, in the directory <samp>gdb/features</samp>.
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</p>
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<p>Names recognized by <small>GDB</small> should include the name of the
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company or organization which selected the name, and the overall
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architecture to which the feature applies; so e.g. the feature
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containing ARM core registers is named ‘<samp>org.gnu.gdb.arm.core</samp>’.
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</p>
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<p>The names of registers are not case sensitive for the purpose
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of recognizing standard features, but <small>GDB</small> will only display
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registers using the capitalization used in the description.
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</p>
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<tr><td align="left" valign="top">• <a href="AArch64-Features.html#AArch64-Features" accesskey="1">AArch64 Features</a>:</td><td> </td><td align="left" valign="top">
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<tr><td align="left" valign="top">• <a href="ARC-Features.html#ARC-Features" accesskey="2">ARC Features</a>:</td><td> </td><td align="left" valign="top">
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<tr><td align="left" valign="top">• <a href="ARM-Features.html#ARM-Features" accesskey="3">ARM Features</a>:</td><td> </td><td align="left" valign="top">
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</td></tr>
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<tr><td align="left" valign="top">• <a href="i386-Features.html#i386-Features" accesskey="4">i386 Features</a>:</td><td> </td><td align="left" valign="top">
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<tr><td align="left" valign="top">• <a href="MicroBlaze-Features.html#MicroBlaze-Features" accesskey="5">MicroBlaze Features</a>:</td><td> </td><td align="left" valign="top">
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<tr><td align="left" valign="top">• <a href="MIPS-Features.html#MIPS-Features" accesskey="6">MIPS Features</a>:</td><td> </td><td align="left" valign="top">
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<tr><td align="left" valign="top">• <a href="OpenRISC-1000-Features.html#OpenRISC-1000-Features">OpenRISC 1000 Features</a>:</td><td> </td><td align="left" valign="top">
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<tr><td align="left" valign="top">• <a href="PowerPC-Features.html#PowerPC-Features">PowerPC Features</a>:</td><td> </td><td align="left" valign="top">
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<tr><td align="left" valign="top">• <a href="RISC_002dV-Features.html#RISC_002dV-Features">RISC-V Features</a>:</td><td> </td><td align="left" valign="top">
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<tr><td align="left" valign="top">• <a href="RX-Features.html#RX-Features">RX Features</a>:</td><td> </td><td align="left" valign="top">
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<tr><td align="left" valign="top">• <a href="S_002f390-and-System-z-Features.html#S_002f390-and-System-z-Features">S/390 and System z Features</a>:</td><td> </td><td align="left" valign="top">
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<tr><td align="left" valign="top">• <a href="Sparc-Features.html#Sparc-Features">Sparc Features</a>:</td><td> </td><td align="left" valign="top">
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</td></tr>
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<tr><td align="left" valign="top">• <a href="TIC6x-Features.html#TIC6x-Features">TIC6x Features</a>:</td><td> </td><td align="left" valign="top">
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Previous: <a href="Enum-Target-Types.html#Enum-Target-Types" accesskey="p" rel="previous">Enum Target Types</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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