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157 lines
7.4 KiB
HTML
157 lines
7.4 KiB
HTML
4 years ago
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- Copyright (C) 1988-2019 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3 or
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any later version published by the Free Software Foundation; with the
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Invariant Sections being "Free Software" and "Free Software Needs
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Free Documentation", with the Front-Cover Texts being "A GNU Manual,"
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and with the Back-Cover Texts as in (a) below.
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(a) The FSF's Back-Cover Text is: "You are free to copy and modify
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this GNU Manual. Buying copies from GNU Press supports the FSF in
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developing GNU and promoting software freedom." -->
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>Dump/Restore Files (Debugging with GDB)</title>
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<meta name="description" content="Dump/Restore Files (Debugging with GDB)">
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<meta name="keywords" content="Dump/Restore Files (Debugging with GDB)">
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<meta name="resource-type" content="document">
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<meta name="distribution" content="global">
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<meta name="Generator" content="makeinfo">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Concept-Index.html#Concept-Index" rel="index" title="Concept Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Data.html#Data" rel="up" title="Data">
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<link href="Core-File-Generation.html#Core-File-Generation" rel="next" title="Core File Generation">
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<link href="Memory-Region-Attributes.html#Memory-Region-Attributes" rel="prev" title="Memory Region Attributes">
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<style type="text/css">
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<!--
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a.summary-letter {text-decoration: none}
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blockquote.indentedblock {margin-right: 0em}
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blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
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blockquote.smallquotation {font-size: smaller}
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div.display {margin-left: 3.2em}
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div.example {margin-left: 3.2em}
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div.lisp {margin-left: 3.2em}
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div.smalldisplay {margin-left: 3.2em}
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div.smalllisp {margin-left: 3.2em}
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kbd {font-style: oblique}
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pre.display {font-family: inherit}
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pre.format {font-family: inherit}
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pre.menu-comment {font-family: serif}
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pre.menu-preformatted {font-family: serif}
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pre.smalldisplay {font-family: inherit; font-size: smaller}
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pre.smallexample {font-size: smaller}
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pre.smallformat {font-family: inherit; font-size: smaller}
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pre.smalllisp {font-size: smaller}
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span.nolinebreak {white-space: nowrap}
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span.roman {font-family: initial; font-weight: normal}
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span.sansserif {font-family: sans-serif; font-weight: normal}
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ul.no-bullet {list-style: none}
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-->
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</style>
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</head>
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<body lang="en">
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<a name="Dump_002fRestore-Files"></a>
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<div class="header">
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<p>
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Next: <a href="Core-File-Generation.html#Core-File-Generation" accesskey="n" rel="next">Core File Generation</a>, Previous: <a href="Memory-Region-Attributes.html#Memory-Region-Attributes" accesskey="p" rel="prev">Memory Region Attributes</a>, Up: <a href="Data.html#Data" accesskey="u" rel="up">Data</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="Copy-Between-Memory-and-a-File"></a>
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<h3 class="section">10.18 Copy Between Memory and a File</h3>
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<a name="index-dump_002frestore-files"></a>
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<a name="index-append-data-to-a-file"></a>
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<a name="index-dump-data-to-a-file"></a>
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<a name="index-restore-data-from-a-file"></a>
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<p>You can use the commands <code>dump</code>, <code>append</code>, and
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<code>restore</code> to copy data between target memory and a file. The
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<code>dump</code> and <code>append</code> commands write data to a file, and the
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<code>restore</code> command reads data from a file back into the inferior’s
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memory. Files may be in binary, Motorola S-record, Intel hex,
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Tektronix Hex, or Verilog Hex format; however, <small>GDB</small> can only
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append to binary files, and cannot read from Verilog Hex files.
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</p>
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<dl compact="compact">
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<dd>
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<a name="index-dump"></a>
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</dd>
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<dt><code>dump <span class="roman">[</span><var>format</var><span class="roman">]</span> memory <var>filename</var> <var>start_addr</var> <var>end_addr</var></code></dt>
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<dt><code>dump <span class="roman">[</span><var>format</var><span class="roman">]</span> value <var>filename</var> <var>expr</var></code></dt>
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<dd><p>Dump the contents of memory from <var>start_addr</var> to <var>end_addr</var>,
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or the value of <var>expr</var>, to <var>filename</var> in the given format.
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</p>
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<p>The <var>format</var> parameter may be any one of:
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</p><dl compact="compact">
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<dt><code>binary</code></dt>
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<dd><p>Raw binary form.
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</p></dd>
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<dt><code>ihex</code></dt>
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<dd><p>Intel hex format.
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</p></dd>
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<dt><code>srec</code></dt>
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<dd><p>Motorola S-record format.
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</p></dd>
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<dt><code>tekhex</code></dt>
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<dd><p>Tektronix Hex format.
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</p></dd>
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<dt><code>verilog</code></dt>
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<dd><p>Verilog Hex format.
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</p></dd>
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</dl>
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<p><small>GDB</small> uses the same definitions of these formats as the
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<small>GNU</small> binary utilities, like ‘<samp>objdump</samp>’ and ‘<samp>objcopy</samp>’. If
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<var>format</var> is omitted, <small>GDB</small> dumps the data in raw binary
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form.
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</p>
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<a name="index-append"></a>
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</dd>
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<dt><code>append <span class="roman">[</span>binary<span class="roman">]</span> memory <var>filename</var> <var>start_addr</var> <var>end_addr</var></code></dt>
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<dt><code>append <span class="roman">[</span>binary<span class="roman">]</span> value <var>filename</var> <var>expr</var></code></dt>
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<dd><p>Append the contents of memory from <var>start_addr</var> to <var>end_addr</var>,
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or the value of <var>expr</var>, to the file <var>filename</var>, in raw binary form.
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(<small>GDB</small> can only append data to files in raw binary form.)
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</p>
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<a name="index-restore"></a>
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</dd>
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<dt><code>restore <var>filename</var> <span class="roman">[</span>binary<span class="roman">]</span> <var>bias</var> <var>start</var> <var>end</var></code></dt>
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<dd><p>Restore the contents of file <var>filename</var> into memory. The
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<code>restore</code> command can automatically recognize any known <small>BFD</small>
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file format, except for raw binary. To restore a raw binary file you
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must specify the optional keyword <code>binary</code> after the filename.
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</p>
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<p>If <var>bias</var> is non-zero, its value will be added to the addresses
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contained in the file. Binary files always start at address zero, so
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they will be restored at address <var>bias</var>. Other bfd files have
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a built-in location; they will be restored at offset <var>bias</var>
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from that location.
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</p>
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<p>If <var>start</var> and/or <var>end</var> are non-zero, then only data between
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file offset <var>start</var> and file offset <var>end</var> will be restored.
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These offsets are relative to the addresses in the file, before
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the <var>bias</var> argument is applied.
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</p>
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</dd>
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</dl>
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<hr>
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<div class="header">
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<p>
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Next: <a href="Core-File-Generation.html#Core-File-Generation" accesskey="n" rel="next">Core File Generation</a>, Previous: <a href="Memory-Region-Attributes.html#Memory-Region-Attributes" accesskey="p" rel="prev">Memory Region Attributes</a>, Up: <a href="Data.html#Data" accesskey="u" rel="up">Data</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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</body>
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</html>
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