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| <a name="Remote-Configuration-1"></a> |
| <h3 class="section">20.4 Remote Configuration</h3> |
| |
| <a name="index-set-remote"></a> |
| <a name="index-show-remote"></a> |
| <p>This section documents the configuration options available when |
| debugging remote programs. For the options related to the File I/O |
| extensions of the remote protocol, see <a href="system.html#system">system-call-allowed</a>. |
| </p> |
| <dl compact="compact"> |
| <dt><code>set remoteaddresssize <var>bits</var></code></dt> |
| <dd><a name="index-address-size-for-remote-targets"></a> |
| <a name="index-bits-in-remote-address"></a> |
| <p>Set the maximum size of address in a memory packet to the specified |
| number of bits. <small>GDB</small> will mask off the address bits above |
| that number, when it passes addresses to the remote target. The |
| default value is the number of bits in the target’s address. |
| </p> |
| </dd> |
| <dt><code>show remoteaddresssize</code></dt> |
| <dd><p>Show the current value of remote address size in bits. |
| </p> |
| </dd> |
| <dt><code>set serial baud <var>n</var></code></dt> |
| <dd><a name="index-baud-rate-for-remote-targets"></a> |
| <p>Set the baud rate for the remote serial I/O to <var>n</var> baud. The |
| value is used to set the speed of the serial port used for debugging |
| remote targets. |
| </p> |
| </dd> |
| <dt><code>show serial baud</code></dt> |
| <dd><p>Show the current speed of the remote connection. |
| </p> |
| </dd> |
| <dt><code>set serial parity <var>parity</var></code></dt> |
| <dd><p>Set the parity for the remote serial I/O. Supported values of <var>parity</var> are: |
| <code>even</code>, <code>none</code>, and <code>odd</code>. The default is <code>none</code>. |
| </p> |
| </dd> |
| <dt><code>show serial parity</code></dt> |
| <dd><p>Show the current parity of the serial port. |
| </p> |
| </dd> |
| <dt><code>set remotebreak</code></dt> |
| <dd><a name="index-interrupt-remote-programs"></a> |
| <a name="index-BREAK-signal-instead-of-Ctrl_002dC"></a> |
| <a name="set-remotebreak"></a><p>If set to on, <small>GDB</small> sends a <code>BREAK</code> signal to the remote |
| when you type <kbd>Ctrl-c</kbd> to interrupt the program running |
| on the remote. If set to off, <small>GDB</small> sends the ‘<samp>Ctrl-C</samp>’ |
| character instead. The default is off, since most remote systems |
| expect to see ‘<samp>Ctrl-C</samp>’ as the interrupt signal. |
| </p> |
| </dd> |
| <dt><code>show remotebreak</code></dt> |
| <dd><p>Show whether <small>GDB</small> sends <code>BREAK</code> or ‘<samp>Ctrl-C</samp>’ to |
| interrupt the remote program. |
| </p> |
| </dd> |
| <dt><code>set remoteflow on</code></dt> |
| <dt><code>set remoteflow off</code></dt> |
| <dd><a name="index-set-remoteflow"></a> |
| <p>Enable or disable hardware flow control (<code>RTS</code>/<code>CTS</code>) |
| on the serial port used to communicate to the remote target. |
| </p> |
| </dd> |
| <dt><code>show remoteflow</code></dt> |
| <dd><a name="index-show-remoteflow"></a> |
| <p>Show the current setting of hardware flow control. |
| </p> |
| </dd> |
| <dt><code>set remotelogbase <var>base</var></code></dt> |
| <dd><p>Set the base (a.k.a. radix) of logging serial protocol |
| communications to <var>base</var>. Supported values of <var>base</var> are: |
| <code>ascii</code>, <code>octal</code>, and <code>hex</code>. The default is |
| <code>ascii</code>. |
| </p> |
| </dd> |
| <dt><code>show remotelogbase</code></dt> |
| <dd><p>Show the current setting of the radix for logging remote serial |
| protocol. |
| </p> |
| </dd> |
| <dt><code>set remotelogfile <var>file</var></code></dt> |
| <dd><a name="index-record-serial-communications-on-file"></a> |
| <p>Record remote serial communications on the named <var>file</var>. The |
| default is not to record at all. |
| </p> |
| </dd> |
| <dt><code>show remotelogfile.</code></dt> |
| <dd><p>Show the current setting of the file name on which to record the |
| serial communications. |
| </p> |
| </dd> |
| <dt><code>set remotetimeout <var>num</var></code></dt> |
| <dd><a name="index-timeout-for-serial-communications"></a> |
| <a name="index-remote-timeout"></a> |
| <p>Set the timeout limit to wait for the remote target to respond to |
| <var>num</var> seconds. The default is 2 seconds. |
| </p> |
| </dd> |
| <dt><code>show remotetimeout</code></dt> |
| <dd><p>Show the current number of seconds to wait for the remote target |
| responses. |
| </p> |
| <a name="index-limit-hardware-breakpoints-and-watchpoints"></a> |
| <a name="index-remote-target_002c-limit-break_002d-and-watchpoints"></a> |
| <a name="set-remote-hardware_002dwatchpoint_002dlimit"></a><a name="set-remote-hardware_002dbreakpoint_002dlimit"></a></dd> |
| <dt><code>set remote hardware-watchpoint-limit <var>limit</var></code></dt> |
| <dt><code>set remote hardware-breakpoint-limit <var>limit</var></code></dt> |
| <dd><p>Restrict <small>GDB</small> to using <var>limit</var> remote hardware breakpoint or |
| watchpoints. A limit of -1, the default, is treated as unlimited. |
| </p> |
| <a name="index-limit-hardware-watchpoints-length"></a> |
| <a name="index-remote-target_002c-limit-watchpoints-length"></a> |
| <a name="set-remote-hardware_002dwatchpoint_002dlength_002dlimit"></a></dd> |
| <dt><code>set remote hardware-watchpoint-length-limit <var>limit</var></code></dt> |
| <dd><p>Restrict <small>GDB</small> to using <var>limit</var> bytes for the maximum length of |
| a remote hardware watchpoint. A limit of -1, the default, is treated |
| as unlimited. |
| </p> |
| </dd> |
| <dt><code>show remote hardware-watchpoint-length-limit</code></dt> |
| <dd><p>Show the current limit (in bytes) of the maximum length of |
| a remote hardware watchpoint. |
| </p> |
| </dd> |
| <dt><code>set remote exec-file <var>filename</var></code></dt> |
| <dt><code>show remote exec-file</code></dt> |
| <dd><a name="set-remote-exec_002dfile"></a><a name="index-executable-file_002c-for-remote-target"></a> |
| <p>Select the file used for <code>run</code> with <code>target |
| extended-remote</code>. This should be set to a filename valid on the |
| target system. If it is not set, the target will use a default |
| filename (e.g. the last program run). |
| </p> |
| </dd> |
| <dt><code>set remote interrupt-sequence</code></dt> |
| <dd><a name="index-interrupt-remote-programs-1"></a> |
| <a name="index-select-Ctrl_002dC_002c-BREAK-or-BREAK_002dg"></a> |
| <p>Allow the user to select one of ‘<samp>Ctrl-C</samp>’, a <code>BREAK</code> or |
| ‘<samp>BREAK-g</samp>’ as the |
| sequence to the remote target in order to interrupt the execution. |
| ‘<samp>Ctrl-C</samp>’ is a default. Some system prefers <code>BREAK</code> which |
| is high level of serial line for some certain time. |
| Linux kernel prefers ‘<samp>BREAK-g</samp>’, a.k.a Magic SysRq g. |
| It is <code>BREAK</code> signal followed by character <code>g</code>. |
| </p> |
| </dd> |
| <dt><code>show interrupt-sequence</code></dt> |
| <dd><p>Show which of ‘<samp>Ctrl-C</samp>’, <code>BREAK</code> or <code>BREAK-g</code> |
| is sent by <small>GDB</small> to interrupt the remote program. |
| <code>BREAK-g</code> is BREAK signal followed by <code>g</code> and |
| also known as Magic SysRq g. |
| </p> |
| </dd> |
| <dt><code>set remote interrupt-on-connect</code></dt> |
| <dd><a name="index-send-interrupt_002dsequence-on-start"></a> |
| <p>Specify whether interrupt-sequence is sent to remote target when |
| <small>GDB</small> connects to it. This is mostly needed when you debug |
| Linux kernel. Linux kernel expects <code>BREAK</code> followed by <code>g</code> |
| which is known as Magic SysRq g in order to connect <small>GDB</small>. |
| </p> |
| </dd> |
| <dt><code>show interrupt-on-connect</code></dt> |
| <dd><p>Show whether interrupt-sequence is sent |
| to remote target when <small>GDB</small> connects to it. |
| </p> |
| <a name="index-set-tcp"></a> |
| <a name="index-show-tcp"></a> |
| </dd> |
| <dt><code>set tcp auto-retry on</code></dt> |
| <dd><a name="index-auto_002dretry_002c-for-remote-TCP-target"></a> |
| <p>Enable auto-retry for remote TCP connections. This is useful if the remote |
| debugging agent is launched in parallel with <small>GDB</small>; there is a race |
| condition because the agent may not become ready to accept the connection |
| before <small>GDB</small> attempts to connect. When auto-retry is |
| enabled, if the initial attempt to connect fails, <small>GDB</small> reattempts |
| to establish the connection using the timeout specified by |
| <code>set tcp connect-timeout</code>. |
| </p> |
| </dd> |
| <dt><code>set tcp auto-retry off</code></dt> |
| <dd><p>Do not auto-retry failed TCP connections. |
| </p> |
| </dd> |
| <dt><code>show tcp auto-retry</code></dt> |
| <dd><p>Show the current auto-retry setting. |
| </p> |
| </dd> |
| <dt><code>set tcp connect-timeout <var>seconds</var></code></dt> |
| <dt><code>set tcp connect-timeout unlimited</code></dt> |
| <dd><a name="index-connection-timeout_002c-for-remote-TCP-target"></a> |
| <a name="index-timeout_002c-for-remote-target-connection"></a> |
| <p>Set the timeout for establishing a TCP connection to the remote target to |
| <var>seconds</var>. The timeout affects both polling to retry failed connections |
| (enabled by <code>set tcp auto-retry on</code>) and waiting for connections |
| that are merely slow to complete, and represents an approximate cumulative |
| value. If <var>seconds</var> is <code>unlimited</code>, there is no timeout and |
| <small>GDB</small> will keep attempting to establish a connection forever, |
| unless interrupted with <kbd>Ctrl-c</kbd>. The default is 15 seconds. |
| </p> |
| </dd> |
| <dt><code>show tcp connect-timeout</code></dt> |
| <dd><p>Show the current connection timeout setting. |
| </p></dd> |
| </dl> |
| |
| <a name="index-remote-packets_002c-enabling-and-disabling"></a> |
| <p>The <small>GDB</small> remote protocol autodetects the packets supported by |
| your debugging stub. If you need to override the autodetection, you |
| can use these commands to enable or disable individual packets. Each |
| packet can be set to ‘<samp>on</samp>’ (the remote target supports this |
| packet), ‘<samp>off</samp>’ (the remote target does not support this packet), |
| or ‘<samp>auto</samp>’ (detect remote target support for this packet). They |
| all default to ‘<samp>auto</samp>’. For more information about each packet, |
| see <a href="Remote-Protocol.html#Remote-Protocol">Remote Protocol</a>. |
| </p> |
| <p>During normal use, you should not have to use any of these commands. |
| If you do, that may be a bug in your remote debugging stub, or a bug |
| in <small>GDB</small>. You may want to report the problem to the |
| <small>GDB</small> developers. |
| </p> |
| <p>For each packet <var>name</var>, the command to enable or disable the |
| packet is <code>set remote <var>name</var>-packet</code>. The available settings |
| are: |
| </p> |
| <table> |
| <tr><td width="28%">Command Name</td><td width="32%">Remote Packet</td><td width="25%">Related Features</td></tr> |
| <tr><td width="28%"><code>fetch-register</code></td><td width="32%"><code>p</code></td><td width="25%"><code>info registers</code></td></tr> |
| <tr><td width="28%"><code>set-register</code></td><td width="32%"><code>P</code></td><td width="25%"><code>set</code></td></tr> |
| <tr><td width="28%"><code>binary-download</code></td><td width="32%"><code>X</code></td><td width="25%"><code>load</code>, <code>set</code></td></tr> |
| <tr><td width="28%"><code>read-aux-vector</code></td><td width="32%"><code>qXfer:auxv:read</code></td><td width="25%"><code>info auxv</code></td></tr> |
| <tr><td width="28%"><code>symbol-lookup</code></td><td width="32%"><code>qSymbol</code></td><td width="25%">Detecting multiple threads</td></tr> |
| <tr><td width="28%"><code>attach</code></td><td width="32%"><code>vAttach</code></td><td width="25%"><code>attach</code></td></tr> |
| <tr><td width="28%"><code>verbose-resume</code></td><td width="32%"><code>vCont</code></td><td width="25%">Stepping or resuming multiple threads</td></tr> |
| <tr><td width="28%"><code>run</code></td><td width="32%"><code>vRun</code></td><td width="25%"><code>run</code></td></tr> |
| <tr><td width="28%"><code>software-breakpoint</code></td><td width="32%"><code>Z0</code></td><td width="25%"><code>break</code></td></tr> |
| <tr><td width="28%"><code>hardware-breakpoint</code></td><td width="32%"><code>Z1</code></td><td width="25%"><code>hbreak</code></td></tr> |
| <tr><td width="28%"><code>write-watchpoint</code></td><td width="32%"><code>Z2</code></td><td width="25%"><code>watch</code></td></tr> |
| <tr><td width="28%"><code>read-watchpoint</code></td><td width="32%"><code>Z3</code></td><td width="25%"><code>rwatch</code></td></tr> |
| <tr><td width="28%"><code>access-watchpoint</code></td><td width="32%"><code>Z4</code></td><td width="25%"><code>awatch</code></td></tr> |
| <tr><td width="28%"><code>pid-to-exec-file</code></td><td width="32%"><code>qXfer:exec-file:read</code></td><td width="25%"><code>attach</code>, <code>run</code></td></tr> |
| <tr><td width="28%"><code>target-features</code></td><td width="32%"><code>qXfer:features:read</code></td><td width="25%"><code>set architecture</code></td></tr> |
| <tr><td width="28%"><code>library-info</code></td><td width="32%"><code>qXfer:libraries:read</code></td><td width="25%"><code>info sharedlibrary</code></td></tr> |
| <tr><td width="28%"><code>memory-map</code></td><td width="32%"><code>qXfer:memory-map:read</code></td><td width="25%"><code>info mem</code></td></tr> |
| <tr><td width="28%"><code>read-sdata-object</code></td><td width="32%"><code>qXfer:sdata:read</code></td><td width="25%"><code>print $_sdata</code></td></tr> |
| <tr><td width="28%"><code>read-spu-object</code></td><td width="32%"><code>qXfer:spu:read</code></td><td width="25%"><code>info spu</code></td></tr> |
| <tr><td width="28%"><code>write-spu-object</code></td><td width="32%"><code>qXfer:spu:write</code></td><td width="25%"><code>info spu</code></td></tr> |
| <tr><td width="28%"><code>read-siginfo-object</code></td><td width="32%"><code>qXfer:siginfo:read</code></td><td width="25%"><code>print $_siginfo</code></td></tr> |
| <tr><td width="28%"><code>write-siginfo-object</code></td><td width="32%"><code>qXfer:siginfo:write</code></td><td width="25%"><code>set $_siginfo</code></td></tr> |
| <tr><td width="28%"><code>threads</code></td><td width="32%"><code>qXfer:threads:read</code></td><td width="25%"><code>info threads</code></td></tr> |
| <tr><td width="28%"><code>get-thread-local-<br>storage-address</code></td><td width="32%"><code>qGetTLSAddr</code></td><td width="25%">Displaying <code>__thread</code> variables</td></tr> |
| <tr><td width="28%"><code>get-thread-information-block-address</code></td><td width="32%"><code>qGetTIBAddr</code></td><td width="25%">Display MS-Windows Thread Information Block.</td></tr> |
| <tr><td width="28%"><code>search-memory</code></td><td width="32%"><code>qSearch:memory</code></td><td width="25%"><code>find</code></td></tr> |
| <tr><td width="28%"><code>supported-packets</code></td><td width="32%"><code>qSupported</code></td><td width="25%">Remote communications parameters</td></tr> |
| <tr><td width="28%"><code>pass-signals</code></td><td width="32%"><code>QPassSignals</code></td><td width="25%"><code>handle <var>signal</var></code></td></tr> |
| <tr><td width="28%"><code>program-signals</code></td><td width="32%"><code>QProgramSignals</code></td><td width="25%"><code>handle <var>signal</var></code></td></tr> |
| <tr><td width="28%"><code>hostio-close-packet</code></td><td width="32%"><code>vFile:close</code></td><td width="25%"><code>remote get</code>, <code>remote put</code></td></tr> |
| <tr><td width="28%"><code>hostio-open-packet</code></td><td width="32%"><code>vFile:open</code></td><td width="25%"><code>remote get</code>, <code>remote put</code></td></tr> |
| <tr><td width="28%"><code>hostio-pread-packet</code></td><td width="32%"><code>vFile:pread</code></td><td width="25%"><code>remote get</code>, <code>remote put</code></td></tr> |
| <tr><td width="28%"><code>hostio-pwrite-packet</code></td><td width="32%"><code>vFile:pwrite</code></td><td width="25%"><code>remote get</code>, <code>remote put</code></td></tr> |
| <tr><td width="28%"><code>hostio-unlink-packet</code></td><td width="32%"><code>vFile:unlink</code></td><td width="25%"><code>remote delete</code></td></tr> |
| <tr><td width="28%"><code>hostio-readlink-packet</code></td><td width="32%"><code>vFile:readlink</code></td><td width="25%">Host I/O</td></tr> |
| <tr><td width="28%"><code>hostio-fstat-packet</code></td><td width="32%"><code>vFile:fstat</code></td><td width="25%">Host I/O</td></tr> |
| <tr><td width="28%"><code>hostio-setfs-packet</code></td><td width="32%"><code>vFile:setfs</code></td><td width="25%">Host I/O</td></tr> |
| <tr><td width="28%"><code>noack-packet</code></td><td width="32%"><code>QStartNoAckMode</code></td><td width="25%">Packet acknowledgment</td></tr> |
| <tr><td width="28%"><code>osdata</code></td><td width="32%"><code>qXfer:osdata:read</code></td><td width="25%"><code>info os</code></td></tr> |
| <tr><td width="28%"><code>query-attached</code></td><td width="32%"><code>qAttached</code></td><td width="25%">Querying remote process attach state.</td></tr> |
| <tr><td width="28%"><code>trace-buffer-size</code></td><td width="32%"><code>QTBuffer:size</code></td><td width="25%"><code>set trace-buffer-size</code></td></tr> |
| <tr><td width="28%"><code>trace-status</code></td><td width="32%"><code>qTStatus</code></td><td width="25%"><code>tstatus</code></td></tr> |
| <tr><td width="28%"><code>traceframe-info</code></td><td width="32%"><code>qXfer:traceframe-info:read</code></td><td width="25%">Traceframe info</td></tr> |
| <tr><td width="28%"><code>install-in-trace</code></td><td width="32%"><code>InstallInTrace</code></td><td width="25%">Install tracepoint in tracing</td></tr> |
| <tr><td width="28%"><code>disable-randomization</code></td><td width="32%"><code>QDisableRandomization</code></td><td width="25%"><code>set disable-randomization</code></td></tr> |
| <tr><td width="28%"><code>conditional-breakpoints-packet</code></td><td width="32%"><code>Z0 and Z1</code></td><td width="25%"><code>Support for target-side breakpoint condition evaluation</code></td></tr> |
| <tr><td width="28%"><code>swbreak-feature</code></td><td width="32%"><code>swbreak stop reason</code></td><td width="25%"><code>break</code></td></tr> |
| <tr><td width="28%"><code>hwbreak-feature</code></td><td width="32%"><code>hwbreak stop reason</code></td><td width="25%"><code>hbreak</code></td></tr> |
| <tr><td width="28%"><code>fork-event-feature</code></td><td width="32%"><code>fork stop reason</code></td><td width="25%"><code>fork</code></td></tr> |
| <tr><td width="28%"><code>vfork-event-feature</code></td><td width="32%"><code>vfork stop reason</code></td><td width="25%"><code>vfork</code></td></tr> |
| </table> |
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