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<title>Debugging with GDB: PowerPC Features</title>

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<a name="PowerPC-Features"></a>
<div class="header">
<p>
Next: <a href="RISC_002dV-Features.html#RISC_002dV-Features" accesskey="n" rel="next">RISC-V Features</a>, Previous: <a href="OpenRISC-1000-Features.html#OpenRISC-1000-Features" accesskey="p" rel="previous">OpenRISC 1000 Features</a>, Up: <a href="Standard-Target-Features.html#Standard-Target-Features" accesskey="u" rel="up">Standard Target Features</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>
</div>
<hr>
<a name="PowerPC-Features-1"></a>
<h4 class="subsection">G.5.11 PowerPC Features</h4>
<a name="index-target-descriptions_002c-PowerPC-features"></a>

<p>The &lsquo;<samp>org.gnu.gdb.power.core</samp>&rsquo; feature is required for PowerPC
targets.  It should contain registers &lsquo;<samp>r0</samp>&rsquo; through &lsquo;<samp>r31</samp>&rsquo;,
&lsquo;<samp>pc</samp>&rsquo;, &lsquo;<samp>msr</samp>&rsquo;, &lsquo;<samp>cr</samp>&rsquo;, &lsquo;<samp>lr</samp>&rsquo;, &lsquo;<samp>ctr</samp>&rsquo;, and
&lsquo;<samp>xer</samp>&rsquo;.  They may be 32-bit or 64-bit depending on the target.
</p>
<p>The &lsquo;<samp>org.gnu.gdb.power.fpu</samp>&rsquo; feature is optional.  It should
contain registers &lsquo;<samp>f0</samp>&rsquo; through &lsquo;<samp>f31</samp>&rsquo; and &lsquo;<samp>fpscr</samp>&rsquo;.
</p>
<p>The &lsquo;<samp>org.gnu.gdb.power.altivec</samp>&rsquo; feature is optional.  It should
contain registers &lsquo;<samp>vr0</samp>&rsquo; through &lsquo;<samp>vr31</samp>&rsquo;, &lsquo;<samp>vscr</samp>&rsquo;, and
&lsquo;<samp>vrsave</samp>&rsquo;.  <small>GDB</small> will define pseudo-registers &lsquo;<samp>v0</samp>&rsquo;
through &lsquo;<samp>v31</samp>&rsquo; as aliases for the corresponding &lsquo;<samp>vrX</samp>&rsquo;
registers.
</p>
<p>The &lsquo;<samp>org.gnu.gdb.power.vsx</samp>&rsquo; feature is optional.  It should
contain registers &lsquo;<samp>vs0h</samp>&rsquo; through &lsquo;<samp>vs31h</samp>&rsquo;.  <small>GDB</small> will
combine these registers with the floating point registers (&lsquo;<samp>f0</samp>&rsquo;
through &lsquo;<samp>f31</samp>&rsquo;) and the altivec registers (&lsquo;<samp>vr0</samp>&rsquo; through
&lsquo;<samp>vr31</samp>&rsquo;) to present the 128-bit wide registers &lsquo;<samp>vs0</samp>&rsquo; through
&lsquo;<samp>vs63</samp>&rsquo;, the set of vector-scalar registers for POWER7.
Therefore, this feature requires both &lsquo;<samp>org.gnu.gdb.power.fpu</samp>&rsquo; and
&lsquo;<samp>org.gnu.gdb.power.altivec</samp>&rsquo;.
</p>
<p>The &lsquo;<samp>org.gnu.gdb.power.spe</samp>&rsquo; feature is optional.  It should
contain registers &lsquo;<samp>ev0h</samp>&rsquo; through &lsquo;<samp>ev31h</samp>&rsquo;, &lsquo;<samp>acc</samp>&rsquo;, and
&lsquo;<samp>spefscr</samp>&rsquo;.  SPE targets should provide 32-bit registers in
&lsquo;<samp>org.gnu.gdb.power.core</samp>&rsquo; and provide the upper halves in
&lsquo;<samp>ev0h</samp>&rsquo; through &lsquo;<samp>ev31h</samp>&rsquo;.  <small>GDB</small> will combine
these to present registers &lsquo;<samp>ev0</samp>&rsquo; through &lsquo;<samp>ev31</samp>&rsquo; to the
user.
</p>
<p>The &lsquo;<samp>org.gnu.gdb.power.ppr</samp>&rsquo; feature is optional.  It should
contain the 64-bit register &lsquo;<samp>ppr</samp>&rsquo;.
</p>
<p>The &lsquo;<samp>org.gnu.gdb.power.dscr</samp>&rsquo; feature is optional.  It should
contain the 64-bit register &lsquo;<samp>dscr</samp>&rsquo;.
</p>
<p>The &lsquo;<samp>org.gnu.gdb.power.tar</samp>&rsquo; feature is optional.  It should
contain the 64-bit register &lsquo;<samp>tar</samp>&rsquo;.
</p>
<p>The &lsquo;<samp>org.gnu.gdb.power.ebb</samp>&rsquo; feature is optional.  It should
contain registers &lsquo;<samp>bescr</samp>&rsquo;, &lsquo;<samp>ebbhr</samp>&rsquo; and &lsquo;<samp>ebbrr</samp>&rsquo;, all
64-bit wide.
</p>
<p>The &lsquo;<samp>org.gnu.gdb.power.linux.pmu</samp>&rsquo; feature is optional.  It should
contain registers &lsquo;<samp>mmcr0</samp>&rsquo;, &lsquo;<samp>mmcr2</samp>&rsquo;, &lsquo;<samp>siar</samp>&rsquo;, &lsquo;<samp>sdar</samp>&rsquo;
and &lsquo;<samp>sier</samp>&rsquo;, all 64-bit wide.  This is the subset of the isa 2.07
server PMU registers provided by <small>GNU</small>/Linux.
</p>
<p>The &lsquo;<samp>org.gnu.gdb.power.htm.spr</samp>&rsquo; feature is optional.  It should
contain registers &lsquo;<samp>tfhar</samp>&rsquo;, &lsquo;<samp>texasr</samp>&rsquo; and &lsquo;<samp>tfiar</samp>&rsquo;, all
64-bit wide.
</p>
<p>The &lsquo;<samp>org.gnu.gdb.power.htm.core</samp>&rsquo; feature is optional.  It should
contain the checkpointed general-purpose registers &lsquo;<samp>cr0</samp>&rsquo; through
&lsquo;<samp>cr31</samp>&rsquo;, as well as the checkpointed registers &lsquo;<samp>clr</samp>&rsquo; and
&lsquo;<samp>cctr</samp>&rsquo;.  These registers may all be either 32-bit or 64-bit
depending on the target.  It should also contain the checkpointed
registers &lsquo;<samp>ccr</samp>&rsquo; and &lsquo;<samp>cxer</samp>&rsquo;, which should both be 32-bit
wide.
</p>
<p>The &lsquo;<samp>org.gnu.gdb.power.htm.fpu</samp>&rsquo; feature is optional.  It should
contain the checkpointed 64-bit floating-point registers &lsquo;<samp>cf0</samp>&rsquo;
through &lsquo;<samp>cf31</samp>&rsquo;, as well as the checkpointed 64-bit register
&lsquo;<samp>cfpscr</samp>&rsquo;.
</p>
<p>The &lsquo;<samp>org.gnu.gdb.power.htm.altivec</samp>&rsquo; feature is optional.  It
should contain the checkpointed altivec registers &lsquo;<samp>cvr0</samp>&rsquo; through
&lsquo;<samp>cvr31</samp>&rsquo;, all 128-bit wide.  It should also contain the
checkpointed registers &lsquo;<samp>cvscr</samp>&rsquo; and &lsquo;<samp>cvrsave</samp>&rsquo;, both 32-bit
wide.
</p>
<p>The &lsquo;<samp>org.gnu.gdb.power.htm.vsx</samp>&rsquo; feature is optional.  It should
contain registers &lsquo;<samp>cvs0h</samp>&rsquo; through &lsquo;<samp>cvs31h</samp>&rsquo;.  <small>GDB</small>
will combine these registers with the checkpointed floating point
registers (&lsquo;<samp>cf0</samp>&rsquo; through &lsquo;<samp>cf31</samp>&rsquo;) and the checkpointed
altivec registers (&lsquo;<samp>cvr0</samp>&rsquo; through &lsquo;<samp>cvr31</samp>&rsquo;) to present the
128-bit wide checkpointed vector-scalar registers &lsquo;<samp>cvs0</samp>&rsquo; through
&lsquo;<samp>cvs63</samp>&rsquo;.  Therefore, this feature requires both
&lsquo;<samp>org.gnu.gdb.power.htm.altivec</samp>&rsquo; and
&lsquo;<samp>org.gnu.gdb.power.htm.fpu</samp>&rsquo;.
</p>
<p>The &lsquo;<samp>org.gnu.gdb.power.htm.ppr</samp>&rsquo; feature is optional.  It should
contain the 64-bit checkpointed register &lsquo;<samp>cppr</samp>&rsquo;.
</p>
<p>The &lsquo;<samp>org.gnu.gdb.power.htm.dscr</samp>&rsquo; feature is optional.  It should
contain the 64-bit checkpointed register &lsquo;<samp>cdscr</samp>&rsquo;.
</p>
<p>The &lsquo;<samp>org.gnu.gdb.power.htm.tar</samp>&rsquo; feature is optional.  It should
contain the 64-bit checkpointed register &lsquo;<samp>ctar</samp>&rsquo;.
</p>

<hr>
<div class="header">
<p>
Next: <a href="RISC_002dV-Features.html#RISC_002dV-Features" accesskey="n" rel="next">RISC-V Features</a>, Previous: <a href="OpenRISC-1000-Features.html#OpenRISC-1000-Features" accesskey="p" rel="previous">OpenRISC 1000 Features</a>, Up: <a href="Standard-Target-Features.html#Standard-Target-Features" accesskey="u" rel="up">Standard Target Features</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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