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<title>Debugging with GDB: GDB/MI Target Manipulation</title>
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<a name="GDB_002fMI-Target-Manipulation"></a>
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<div class="header">
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<p>
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Next: <a href="GDB_002fMI-File-Transfer-Commands.html#GDB_002fMI-File-Transfer-Commands" accesskey="n" rel="next">GDB/MI File Transfer Commands</a>, Previous: <a href="GDB_002fMI-File-Commands.html#GDB_002fMI-File-Commands" accesskey="p" rel="previous">GDB/MI File Commands</a>, Up: <a href="GDB_002fMI.html#GDB_002fMI" accesskey="u" rel="up">GDB/MI</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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</div>
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<hr>
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<a name="GDB_002fMI-Target-Manipulation-Commands"></a>
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<h3 class="section">27.20 <small>GDB/MI</small> Target Manipulation Commands</h3>
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<a name="The-_002dtarget_002dattach-Command"></a>
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<h4 class="subheading">The <code>-target-attach</code> Command</h4>
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<a name="index-_002dtarget_002dattach"></a>
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<a name="Synopsis-93"></a>
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<h4 class="subsubheading">Synopsis</h4>
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<div class="smallexample">
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<pre class="smallexample"> -target-attach <var>pid</var> | <var>gid</var> | <var>file</var>
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</pre></div>
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<p>Attach to a process <var>pid</var> or a file <var>file</var> outside of
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<small>GDB</small>, or a thread group <var>gid</var>. If attaching to a thread
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group, the id previously returned by
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‘<samp>-list-thread-groups --available</samp>’ must be used.
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</p>
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<a name="GDB-Command-75"></a>
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<h4 class="subsubheading"><small>GDB</small> Command</h4>
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<p>The corresponding <small>GDB</small> command is ‘<samp>attach</samp>’.
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</p>
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<a name="Example-75"></a>
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<h4 class="subsubheading">Example</h4>
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<div class="smallexample">
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<pre class="smallexample">(gdb)
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-target-attach 34
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=thread-created,id="1"
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*stopped,thread-id="1",frame={addr="0xb7f7e410",func="bar",args=[]}
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^done
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(gdb)
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</pre></div>
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<a name="The-_002dtarget_002ddetach-Command"></a>
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<h4 class="subheading">The <code>-target-detach</code> Command</h4>
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<a name="index-_002dtarget_002ddetach"></a>
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<a name="Synopsis-94"></a>
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<h4 class="subsubheading">Synopsis</h4>
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<div class="smallexample">
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<pre class="smallexample"> -target-detach [ <var>pid</var> | <var>gid</var> ]
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</pre></div>
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<p>Detach from the remote target which normally resumes its execution.
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If either <var>pid</var> or <var>gid</var> is specified, detaches from either
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the specified process, or specified thread group. There’s no output.
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</p>
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<a name="GDB-Command-76"></a>
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<h4 class="subsubheading"><small>GDB</small> Command</h4>
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<p>The corresponding <small>GDB</small> command is ‘<samp>detach</samp>’.
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</p>
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<a name="Example-76"></a>
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<h4 class="subsubheading">Example</h4>
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<div class="smallexample">
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<pre class="smallexample">(gdb)
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-target-detach
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^done
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(gdb)
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</pre></div>
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<a name="The-_002dtarget_002ddisconnect-Command"></a>
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<h4 class="subheading">The <code>-target-disconnect</code> Command</h4>
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<a name="index-_002dtarget_002ddisconnect"></a>
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<a name="Synopsis-95"></a>
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<h4 class="subsubheading">Synopsis</h4>
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<div class="smallexample">
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<pre class="smallexample"> -target-disconnect
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</pre></div>
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<p>Disconnect from the remote target. There’s no output and the target is
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generally not resumed.
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</p>
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<a name="GDB-Command-77"></a>
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<h4 class="subsubheading"><small>GDB</small> Command</h4>
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<p>The corresponding <small>GDB</small> command is ‘<samp>disconnect</samp>’.
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</p>
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<a name="Example-77"></a>
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<h4 class="subsubheading">Example</h4>
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<div class="smallexample">
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<pre class="smallexample">(gdb)
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-target-disconnect
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^done
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(gdb)
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</pre></div>
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<a name="The-_002dtarget_002ddownload-Command"></a>
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<h4 class="subheading">The <code>-target-download</code> Command</h4>
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<a name="index-_002dtarget_002ddownload"></a>
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<a name="Synopsis-96"></a>
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<h4 class="subsubheading">Synopsis</h4>
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<div class="smallexample">
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<pre class="smallexample"> -target-download
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</pre></div>
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<p>Loads the executable onto the remote target.
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It prints out an update message every half second, which includes the fields:
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</p>
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<dl compact="compact">
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<dt>‘<samp>section</samp>’</dt>
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<dd><p>The name of the section.
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</p></dd>
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<dt>‘<samp>section-sent</samp>’</dt>
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<dd><p>The size of what has been sent so far for that section.
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</p></dd>
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<dt>‘<samp>section-size</samp>’</dt>
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<dd><p>The size of the section.
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</p></dd>
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<dt>‘<samp>total-sent</samp>’</dt>
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<dd><p>The total size of what was sent so far (the current and the previous sections).
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</p></dd>
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<dt>‘<samp>total-size</samp>’</dt>
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<dd><p>The size of the overall executable to download.
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</p></dd>
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</dl>
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<p>Each message is sent as status record (see <a href="GDB_002fMI-Output-Syntax.html#GDB_002fMI-Output-Syntax"><small>GDB/MI</small> Output Syntax</a>).
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</p>
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<p>In addition, it prints the name and size of the sections, as they are
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downloaded. These messages include the following fields:
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</p>
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<dl compact="compact">
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<dt>‘<samp>section</samp>’</dt>
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<dd><p>The name of the section.
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</p></dd>
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<dt>‘<samp>section-size</samp>’</dt>
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<dd><p>The size of the section.
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</p></dd>
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<dt>‘<samp>total-size</samp>’</dt>
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<dd><p>The size of the overall executable to download.
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</p></dd>
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</dl>
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<p>At the end, a summary is printed.
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</p>
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<a name="GDB-Command-78"></a>
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<h4 class="subsubheading"><small>GDB</small> Command</h4>
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<p>The corresponding <small>GDB</small> command is ‘<samp>load</samp>’.
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</p>
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<a name="Example-78"></a>
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<h4 class="subsubheading">Example</h4>
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<p>Note: each status message appears on a single line. Here the messages
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have been broken down so that they can fit onto a page.
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</p>
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<div class="smallexample">
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<pre class="smallexample">(gdb)
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-target-download
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+download,{section=".text",section-size="6668",total-size="9880"}
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+download,{section=".text",section-sent="512",section-size="6668",
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total-sent="512",total-size="9880"}
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+download,{section=".text",section-sent="1024",section-size="6668",
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total-sent="1024",total-size="9880"}
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+download,{section=".text",section-sent="1536",section-size="6668",
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total-sent="1536",total-size="9880"}
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+download,{section=".text",section-sent="2048",section-size="6668",
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total-sent="2048",total-size="9880"}
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+download,{section=".text",section-sent="2560",section-size="6668",
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total-sent="2560",total-size="9880"}
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+download,{section=".text",section-sent="3072",section-size="6668",
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total-sent="3072",total-size="9880"}
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+download,{section=".text",section-sent="3584",section-size="6668",
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total-sent="3584",total-size="9880"}
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+download,{section=".text",section-sent="4096",section-size="6668",
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total-sent="4096",total-size="9880"}
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+download,{section=".text",section-sent="4608",section-size="6668",
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total-sent="4608",total-size="9880"}
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+download,{section=".text",section-sent="5120",section-size="6668",
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total-sent="5120",total-size="9880"}
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+download,{section=".text",section-sent="5632",section-size="6668",
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total-sent="5632",total-size="9880"}
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+download,{section=".text",section-sent="6144",section-size="6668",
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total-sent="6144",total-size="9880"}
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+download,{section=".text",section-sent="6656",section-size="6668",
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total-sent="6656",total-size="9880"}
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+download,{section=".init",section-size="28",total-size="9880"}
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+download,{section=".fini",section-size="28",total-size="9880"}
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+download,{section=".data",section-size="3156",total-size="9880"}
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+download,{section=".data",section-sent="512",section-size="3156",
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total-sent="7236",total-size="9880"}
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+download,{section=".data",section-sent="1024",section-size="3156",
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total-sent="7748",total-size="9880"}
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+download,{section=".data",section-sent="1536",section-size="3156",
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total-sent="8260",total-size="9880"}
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+download,{section=".data",section-sent="2048",section-size="3156",
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total-sent="8772",total-size="9880"}
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+download,{section=".data",section-sent="2560",section-size="3156",
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total-sent="9284",total-size="9880"}
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+download,{section=".data",section-sent="3072",section-size="3156",
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total-sent="9796",total-size="9880"}
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^done,address="0x10004",load-size="9880",transfer-rate="6586",
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write-rate="429"
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(gdb)
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</pre></div>
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<a name="GDB-Command-79"></a>
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<h4 class="subsubheading"><small>GDB</small> Command</h4>
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<p>No equivalent.
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</p>
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<a name="Example-79"></a>
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<h4 class="subsubheading">Example</h4>
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<p>N.A.
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</p>
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<a name="The-_002dtarget_002dflash_002derase-Command"></a>
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<h4 class="subheading">The <code>-target-flash-erase</code> Command</h4>
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<a name="index-_002dtarget_002dflash_002derase"></a>
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<a name="Synopsis-97"></a>
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<h4 class="subsubheading">Synopsis</h4>
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<div class="smallexample">
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<pre class="smallexample"> -target-flash-erase
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</pre></div>
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<p>Erases all known flash memory regions on the target.
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</p>
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<p>The corresponding <small>GDB</small> command is ‘<samp>flash-erase</samp>’.
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</p>
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<p>The output is a list of flash regions that have been erased, with starting
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addresses and memory region sizes.
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</p>
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<div class="smallexample">
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<pre class="smallexample">(gdb)
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-target-flash-erase
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^done,erased-regions={address="0x0",size="0x40000"}
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(gdb)
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</pre></div>
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<a name="The-_002dtarget_002dselect-Command"></a>
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<h4 class="subheading">The <code>-target-select</code> Command</h4>
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<a name="index-_002dtarget_002dselect"></a>
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<a name="Synopsis-98"></a>
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<h4 class="subsubheading">Synopsis</h4>
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<div class="smallexample">
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<pre class="smallexample"> -target-select <var>type</var> <var>parameters …</var>
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</pre></div>
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<p>Connect <small>GDB</small> to the remote target. This command takes two args:
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</p>
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<dl compact="compact">
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<dt>‘<samp><var>type</var></samp>’</dt>
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<dd><p>The type of target, for instance ‘<samp>remote</samp>’, etc.
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</p></dd>
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<dt>‘<samp><var>parameters</var></samp>’</dt>
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<dd><p>Device names, host names and the like. See <a href="Target-Commands.html#Target-Commands">Commands for Managing Targets</a>, for more details.
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</p></dd>
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</dl>
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<p>The output is a connection notification, followed by the address at
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which the target program is, in the following form:
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</p>
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<div class="smallexample">
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<pre class="smallexample">^connected,addr="<var>address</var>",func="<var>function name</var>",
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args=[<var>arg list</var>]
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</pre></div>
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|
<a name="GDB-Command-80"></a>
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<h4 class="subsubheading"><small>GDB</small> Command</h4>
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<p>The corresponding <small>GDB</small> command is ‘<samp>target</samp>’.
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</p>
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<a name="Example-80"></a>
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<h4 class="subsubheading">Example</h4>
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<div class="smallexample">
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<pre class="smallexample">(gdb)
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-target-select remote /dev/ttya
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^connected,addr="0xfe00a300",func="??",args=[]
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(gdb)
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</pre></div>
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<hr>
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<p>
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Next: <a href="GDB_002fMI-File-Transfer-Commands.html#GDB_002fMI-File-Transfer-Commands" accesskey="n" rel="next">GDB/MI File Transfer Commands</a>, Previous: <a href="GDB_002fMI-File-Commands.html#GDB_002fMI-File-Commands" accesskey="p" rel="previous">GDB/MI File Commands</a>, Up: <a href="GDB_002fMI.html#GDB_002fMI" accesskey="u" rel="up">GDB/MI</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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