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  16. <title>Standard Target Features (Debugging with GDB)</title>
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  26. <link href="AArch64-Features.html#AArch64-Features" rel="next" title="AArch64 Features">
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  57. <a name="Standard-Target-Features"></a>
  58. <div class="header">
  59. <p>
  60. Previous: <a href="Enum-Target-Types.html#Enum-Target-Types" accesskey="p" rel="prev">Enum Target Types</a>, Up: <a href="Target-Descriptions.html#Target-Descriptions" accesskey="u" rel="up">Target Descriptions</a> &nbsp; [<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>
  61. </div>
  62. <hr>
  63. <a name="Standard-Target-Features-1"></a>
  64. <h3 class="section">G.5 Standard Target Features</h3>
  65. <a name="index-target-descriptions_002c-standard-features"></a>
  66. <p>A target description must contain either no registers or all the
  67. target&rsquo;s registers. If the description contains no registers, then
  68. <small>GDB</small> will assume a default register layout, selected based on
  69. the architecture. If the description contains any registers, the
  70. default layout will not be used; the standard registers must be
  71. described in the target description, in such a way that <small>GDB</small>
  72. can recognize them.
  73. </p>
  74. <p>This is accomplished by giving specific names to feature elements
  75. which contain standard registers. <small>GDB</small> will look for features
  76. with those names and verify that they contain the expected registers;
  77. if any known feature is missing required registers, or if any required
  78. feature is missing, <small>GDB</small> will reject the target
  79. description. You can add additional registers to any of the
  80. standard features &mdash; <small>GDB</small> will display them just as if
  81. they were added to an unrecognized feature.
  82. </p>
  83. <p>This section lists the known features and their expected contents.
  84. Sample XML documents for these features are included in the
  85. <small>GDB</small> source tree, in the directory <samp>gdb/features</samp>.
  86. </p>
  87. <p>Names recognized by <small>GDB</small> should include the name of the
  88. company or organization which selected the name, and the overall
  89. architecture to which the feature applies; so e.g. the feature
  90. containing ARM core registers is named &lsquo;<samp>org.gnu.gdb.arm.core</samp>&rsquo;.
  91. </p>
  92. <p>The names of registers are not case sensitive for the purpose
  93. of recognizing standard features, but <small>GDB</small> will only display
  94. registers using the capitalization used in the description.
  95. </p>
  96. <table class="menu" border="0" cellspacing="0">
  97. <tr><td align="left" valign="top">&bull; <a href="AArch64-Features.html#AArch64-Features" accesskey="1">AArch64 Features</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
  98. </td></tr>
  99. <tr><td align="left" valign="top">&bull; <a href="ARC-Features.html#ARC-Features" accesskey="2">ARC Features</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
  100. </td></tr>
  101. <tr><td align="left" valign="top">&bull; <a href="ARM-Features.html#ARM-Features" accesskey="3">ARM Features</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
  102. </td></tr>
  103. <tr><td align="left" valign="top">&bull; <a href="i386-Features.html#i386-Features" accesskey="4">i386 Features</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
  104. </td></tr>
  105. <tr><td align="left" valign="top">&bull; <a href="MicroBlaze-Features.html#MicroBlaze-Features" accesskey="5">MicroBlaze Features</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
  106. </td></tr>
  107. <tr><td align="left" valign="top">&bull; <a href="MIPS-Features.html#MIPS-Features" accesskey="6">MIPS Features</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
  108. </td></tr>
  109. <tr><td align="left" valign="top">&bull; <a href="M68K-Features.html#M68K-Features" accesskey="7">M68K Features</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
  110. </td></tr>
  111. <tr><td align="left" valign="top">&bull; <a href="NDS32-Features.html#NDS32-Features" accesskey="8">NDS32 Features</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
  112. </td></tr>
  113. <tr><td align="left" valign="top">&bull; <a href="Nios-II-Features.html#Nios-II-Features" accesskey="9">Nios II Features</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
  114. </td></tr>
  115. <tr><td align="left" valign="top">&bull; <a href="OpenRISC-1000-Features.html#OpenRISC-1000-Features">OpenRISC 1000 Features</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
  116. </td></tr>
  117. <tr><td align="left" valign="top">&bull; <a href="PowerPC-Features.html#PowerPC-Features">PowerPC Features</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
  118. </td></tr>
  119. <tr><td align="left" valign="top">&bull; <a href="RISC_002dV-Features.html#RISC_002dV-Features">RISC-V Features</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
  120. </td></tr>
  121. <tr><td align="left" valign="top">&bull; <a href="RX-Features.html#RX-Features">RX Features</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
  122. </td></tr>
  123. <tr><td align="left" valign="top">&bull; <a href="S_002f390-and-System-z-Features.html#S_002f390-and-System-z-Features">S/390 and System z Features</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
  124. </td></tr>
  125. <tr><td align="left" valign="top">&bull; <a href="Sparc-Features.html#Sparc-Features">Sparc Features</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
  126. </td></tr>
  127. <tr><td align="left" valign="top">&bull; <a href="TIC6x-Features.html#TIC6x-Features">TIC6x Features</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
  128. </td></tr>
  129. </table>
  130. <hr>
  131. <div class="header">
  132. <p>
  133. Previous: <a href="Enum-Target-Types.html#Enum-Target-Types" accesskey="p" rel="prev">Enum Target Types</a>, Up: <a href="Target-Descriptions.html#Target-Descriptions" accesskey="u" rel="up">Target Descriptions</a> &nbsp; [<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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