270 lines
17 KiB
HTML
270 lines
17 KiB
HTML
<!DOCTYPE html>
|
||
<html class="writer-html5" lang="en" data-content_root="../">
|
||
<head>
|
||
<meta charset="utf-8" /><meta name="viewport" content="width=device-width, initial-scale=1" />
|
||
|
||
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
|
||
<title>Generic Loader — QEMU Debian 1:8.2.2+ds-0ubuntu1.11 documentation</title>
|
||
<link rel="stylesheet" type="text/css" href="../_static/pygments.css?v=fa44fd50" />
|
||
<link rel="stylesheet" type="text/css" href="../_static/css/theme.css?v=86f27845" />
|
||
<link rel="stylesheet" type="text/css" href="../_static/theme_overrides.css?v=08e6c168" />
|
||
|
||
|
||
<link rel="shortcut icon" href="../_static/qemu_32x32.png"/>
|
||
|
||
<script src="../_static/jquery.js?v=8dae8fb0"></script>
|
||
<script src="../_static/_sphinx_javascript_frameworks_compat.js?v=2cd50e6c"></script>
|
||
<script src="../_static/documentation_options.js?v=802af9f6"></script>
|
||
<script src="../_static/doctools.js?v=888ff710"></script>
|
||
<script src="../_static/sphinx_highlight.js?v=dc90522c"></script>
|
||
<script src="../_static/custom.js?v=2ab9f71d"></script>
|
||
<script src="../_static/js/theme.js"></script>
|
||
<link rel="index" title="Index" href="../genindex.html" />
|
||
<link rel="search" title="Search" href="../search.html" />
|
||
<link rel="next" title="Guest Loader" href="guest-loader.html" />
|
||
<link rel="prev" title="Direct Linux Boot" href="linuxboot.html" />
|
||
</head>
|
||
|
||
<body class="wy-body-for-nav">
|
||
<div class="wy-grid-for-nav">
|
||
<nav data-toggle="wy-nav-shift" class="wy-nav-side">
|
||
<div class="wy-side-scroll">
|
||
<div class="wy-side-nav-search" style="background: #802400" >
|
||
|
||
|
||
|
||
<a href="../index.html" class="icon icon-home">
|
||
QEMU
|
||
<img src="../_static/qemu_128x128.png" class="logo" alt="Logo"/>
|
||
</a>
|
||
<div class="version">
|
||
8.2.2
|
||
</div>
|
||
<div role="search">
|
||
<form id="rtd-search-form" class="wy-form" action="../search.html" method="get">
|
||
<input type="text" name="q" placeholder="Search docs" aria-label="Search docs" />
|
||
<input type="hidden" name="check_keywords" value="yes" />
|
||
<input type="hidden" name="area" value="default" />
|
||
</form>
|
||
</div>
|
||
</div><div class="wy-menu wy-menu-vertical" data-spy="affix" role="navigation" aria-label="Navigation menu">
|
||
<p class="caption" role="heading"><span class="caption-text">Contents:</span></p>
|
||
<ul class="current">
|
||
<li class="toctree-l1"><a class="reference internal" href="../about/index.html">About QEMU</a></li>
|
||
<li class="toctree-l1 current"><a class="reference internal" href="index.html">System Emulation</a><ul class="current">
|
||
<li class="toctree-l2"><a class="reference internal" href="introduction.html">Introduction</a></li>
|
||
<li class="toctree-l2"><a class="reference internal" href="invocation.html">Invocation</a></li>
|
||
<li class="toctree-l2"><a class="reference internal" href="device-emulation.html">Device Emulation</a></li>
|
||
<li class="toctree-l2"><a class="reference internal" href="keys.html">Keys in the graphical frontends</a></li>
|
||
<li class="toctree-l2"><a class="reference internal" href="mux-chardev.html">Keys in the character backend multiplexer</a></li>
|
||
<li class="toctree-l2"><a class="reference internal" href="monitor.html">QEMU Monitor</a></li>
|
||
<li class="toctree-l2"><a class="reference internal" href="images.html">Disk Images</a></li>
|
||
<li class="toctree-l2"><a class="reference internal" href="virtio-net-failover.html">QEMU virtio-net standby (net_failover)</a></li>
|
||
<li class="toctree-l2"><a class="reference internal" href="linuxboot.html">Direct Linux Boot</a></li>
|
||
<li class="toctree-l2 current"><a class="current reference internal" href="#">Generic Loader</a><ul>
|
||
<li class="toctree-l3"><a class="reference internal" href="#loading-data-into-memory-values">Loading Data into Memory Values</a></li>
|
||
<li class="toctree-l3"><a class="reference internal" href="#setting-a-cpu-s-program-counter">Setting a CPU’s Program Counter</a></li>
|
||
<li class="toctree-l3"><a class="reference internal" href="#loading-files">Loading Files</a></li>
|
||
<li class="toctree-l3"><a class="reference internal" href="#restrictions-and-todos">Restrictions and ToDos</a></li>
|
||
</ul>
|
||
</li>
|
||
<li class="toctree-l2"><a class="reference internal" href="guest-loader.html">Guest Loader</a></li>
|
||
<li class="toctree-l2"><a class="reference internal" href="barrier.html">QEMU Barrier Client</a></li>
|
||
<li class="toctree-l2"><a class="reference internal" href="vnc-security.html">VNC security</a></li>
|
||
<li class="toctree-l2"><a class="reference internal" href="tls.html">TLS setup for network services</a></li>
|
||
<li class="toctree-l2"><a class="reference internal" href="secrets.html">Providing secret data to QEMU</a></li>
|
||
<li class="toctree-l2"><a class="reference internal" href="authz.html">Client authorization</a></li>
|
||
<li class="toctree-l2"><a class="reference internal" href="gdb.html">GDB usage</a></li>
|
||
<li class="toctree-l2"><a class="reference internal" href="replay.html">Record/replay</a></li>
|
||
<li class="toctree-l2"><a class="reference internal" href="managed-startup.html">Managed start up options</a></li>
|
||
<li class="toctree-l2"><a class="reference internal" href="bootindex.html">Managing device boot order with bootindex properties</a></li>
|
||
<li class="toctree-l2"><a class="reference internal" href="cpu-hotplug.html">Virtual CPU hotplug</a></li>
|
||
<li class="toctree-l2"><a class="reference internal" href="pr-manager.html">Persistent reservation managers</a></li>
|
||
<li class="toctree-l2"><a class="reference internal" href="targets.html">QEMU System Emulator Targets</a></li>
|
||
<li class="toctree-l2"><a class="reference internal" href="security.html">Security</a></li>
|
||
<li class="toctree-l2"><a class="reference internal" href="multi-process.html">Multi-process QEMU</a></li>
|
||
<li class="toctree-l2"><a class="reference internal" href="confidential-guest-support.html">Confidential Guest Support</a></li>
|
||
<li class="toctree-l2"><a class="reference internal" href="vm-templating.html">QEMU VM templating</a></li>
|
||
</ul>
|
||
</li>
|
||
<li class="toctree-l1"><a class="reference internal" href="../user/index.html">User Mode Emulation</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="../tools/index.html">Tools</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="../interop/index.html">System Emulation Management and Interoperability</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="../specs/index.html">System Emulation Guest Hardware Specifications</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="../devel/index.html">Developer Information</a></li>
|
||
</ul>
|
||
|
||
</div>
|
||
</div>
|
||
</nav>
|
||
|
||
<section data-toggle="wy-nav-shift" class="wy-nav-content-wrap"><nav class="wy-nav-top" aria-label="Mobile navigation menu" style="background: #802400" >
|
||
<i data-toggle="wy-nav-top" class="fa fa-bars"></i>
|
||
<a href="../index.html">QEMU</a>
|
||
</nav>
|
||
|
||
<div class="wy-nav-content">
|
||
<div class="rst-content">
|
||
<div role="navigation" aria-label="Page navigation">
|
||
<ul class="wy-breadcrumbs">
|
||
<li><a href="../index.html" class="icon icon-home" aria-label="Home"></a></li>
|
||
<li class="breadcrumb-item"><a href="index.html">System Emulation</a></li>
|
||
<li class="breadcrumb-item active">Generic Loader</li>
|
||
<li class="wy-breadcrumbs-aside">
|
||
<a href="https://gitlab.com/qemu-project/qemu/blob/master/docs/system/generic-loader.rst" class="fa fa-gitlab"> Edit on GitLab</a>
|
||
</li>
|
||
</ul>
|
||
<hr/>
|
||
</div>
|
||
<div role="main" class="document" itemscope="itemscope" itemtype="http://schema.org/Article">
|
||
<div itemprop="articleBody">
|
||
|
||
<section id="generic-loader">
|
||
<h1>Generic Loader<a class="headerlink" href="#generic-loader" title="Link to this heading"></a></h1>
|
||
<p>The ‘loader’ device allows the user to load multiple images or values into
|
||
QEMU at startup.</p>
|
||
<section id="loading-data-into-memory-values">
|
||
<h2>Loading Data into Memory Values<a class="headerlink" href="#loading-data-into-memory-values" title="Link to this heading"></a></h2>
|
||
<p>The loader device allows memory values to be set from the command line. This
|
||
can be done by following the syntax below:</p>
|
||
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="o">-</span><span class="n">device</span> <span class="n">loader</span><span class="p">,</span><span class="n">addr</span><span class="o">=<</span><span class="n">addr</span><span class="o">></span><span class="p">,</span><span class="n">data</span><span class="o">=<</span><span class="n">data</span><span class="o">></span><span class="p">,</span><span class="n">data</span><span class="o">-</span><span class="nb">len</span><span class="o">=<</span><span class="n">data</span><span class="o">-</span><span class="nb">len</span><span class="o">></span> \
|
||
<span class="p">[,</span><span class="n">data</span><span class="o">-</span><span class="n">be</span><span class="o">=<</span><span class="n">data</span><span class="o">-</span><span class="n">be</span><span class="o">></span><span class="p">][,</span><span class="n">cpu</span><span class="o">-</span><span class="n">num</span><span class="o">=<</span><span class="n">cpu</span><span class="o">-</span><span class="n">num</span><span class="o">></span><span class="p">]</span>
|
||
</pre></div>
|
||
</div>
|
||
<dl class="simple">
|
||
<dt><code class="docutils literal notranslate"><span class="pre"><addr></span></code></dt><dd><p>The address to store the data in.</p>
|
||
</dd>
|
||
<dt><code class="docutils literal notranslate"><span class="pre"><data></span></code></dt><dd><p>The value to be written to the address. The maximum size of the data
|
||
is 8 bytes.</p>
|
||
</dd>
|
||
<dt><code class="docutils literal notranslate"><span class="pre"><data-len></span></code></dt><dd><p>The length of the data in bytes. This argument must be included if
|
||
the data argument is.</p>
|
||
</dd>
|
||
<dt><code class="docutils literal notranslate"><span class="pre"><data-be></span></code></dt><dd><p>Set to true if the data to be stored on the guest should be written
|
||
as big endian data. The default is to write little endian data.</p>
|
||
</dd>
|
||
<dt><code class="docutils literal notranslate"><span class="pre"><cpu-num></span></code></dt><dd><p>The number of the CPU’s address space where the data should be
|
||
loaded. If not specified the address space of the first CPU is used.</p>
|
||
</dd>
|
||
</dl>
|
||
<p>All values are parsed using the standard QemuOps parsing. This allows the user
|
||
to specify any values in any format supported. By default the values
|
||
will be parsed as decimal. To use hex values the user should prefix the number
|
||
with a ‘0x’.</p>
|
||
<p>An example of loading value 0x8000000e to address 0xfd1a0104 is:</p>
|
||
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="o">-</span><span class="n">device</span> <span class="n">loader</span><span class="p">,</span><span class="n">addr</span><span class="o">=</span><span class="mh">0xfd1a0104</span><span class="p">,</span><span class="n">data</span><span class="o">=</span><span class="mh">0x8000000e</span><span class="p">,</span><span class="n">data</span><span class="o">-</span><span class="nb">len</span><span class="o">=</span><span class="mi">4</span>
|
||
</pre></div>
|
||
</div>
|
||
</section>
|
||
<section id="setting-a-cpu-s-program-counter">
|
||
<h2>Setting a CPU’s Program Counter<a class="headerlink" href="#setting-a-cpu-s-program-counter" title="Link to this heading"></a></h2>
|
||
<p>The loader device allows the CPU’s PC to be set from the command line. This
|
||
can be done by following the syntax below:</p>
|
||
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="o">-</span><span class="n">device</span> <span class="n">loader</span><span class="p">,</span><span class="n">addr</span><span class="o">=<</span><span class="n">addr</span><span class="o">></span><span class="p">,</span><span class="n">cpu</span><span class="o">-</span><span class="n">num</span><span class="o">=<</span><span class="n">cpu</span><span class="o">-</span><span class="n">num</span><span class="o">></span>
|
||
</pre></div>
|
||
</div>
|
||
<dl class="simple">
|
||
<dt><code class="docutils literal notranslate"><span class="pre"><addr></span></code></dt><dd><p>The value to use as the CPU’s PC.</p>
|
||
</dd>
|
||
<dt><code class="docutils literal notranslate"><span class="pre"><cpu-num></span></code></dt><dd><p>The number of the CPU whose PC should be set to the specified value.</p>
|
||
</dd>
|
||
</dl>
|
||
<p>All values are parsed using the standard QemuOpts parsing. This allows the user
|
||
to specify any values in any format supported. By default the values
|
||
will be parsed as decimal. To use hex values the user should prefix the number
|
||
with a ‘0x’.</p>
|
||
<p>An example of setting CPU 0’s PC to 0x8000 is:</p>
|
||
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="o">-</span><span class="n">device</span> <span class="n">loader</span><span class="p">,</span><span class="n">addr</span><span class="o">=</span><span class="mh">0x8000</span><span class="p">,</span><span class="n">cpu</span><span class="o">-</span><span class="n">num</span><span class="o">=</span><span class="mi">0</span>
|
||
</pre></div>
|
||
</div>
|
||
</section>
|
||
<section id="loading-files">
|
||
<h2>Loading Files<a class="headerlink" href="#loading-files" title="Link to this heading"></a></h2>
|
||
<p>The loader device also allows files to be loaded into memory. It can load ELF,
|
||
U-Boot, and Intel HEX executable formats as well as raw images. The syntax is
|
||
shown below:</p>
|
||
<blockquote>
|
||
<div><p>-device loader,file=<file>[,addr=<addr>][,cpu-num=<cpu-num>][,force-raw=<raw>]</p>
|
||
</div></blockquote>
|
||
<dl class="simple">
|
||
<dt><code class="docutils literal notranslate"><span class="pre"><file></span></code></dt><dd><p>A file to be loaded into memory</p>
|
||
</dd>
|
||
<dt><code class="docutils literal notranslate"><span class="pre"><addr></span></code></dt><dd><p>The memory address where the file should be loaded. This is required
|
||
for raw images and ignored for non-raw files.</p>
|
||
</dd>
|
||
<dt><code class="docutils literal notranslate"><span class="pre"><cpu-num></span></code></dt><dd><p>This specifies the CPU that should be used. This is an
|
||
optional argument and will cause the CPU’s PC to be set to the
|
||
memory address where the raw file is loaded or the entry point
|
||
specified in the executable format header. This option should only
|
||
be used for the boot image. This will also cause the image to be
|
||
written to the specified CPU’s address space. If not specified, the
|
||
default is CPU 0.</p>
|
||
</dd>
|
||
<dt><code class="docutils literal notranslate"><span class="pre"><force-raw></span></code></dt><dd><p>Setting ‘force-raw=on’ forces the file to be treated as a raw image.
|
||
This can be used to load supported executable formats as if they
|
||
were raw.</p>
|
||
</dd>
|
||
</dl>
|
||
<p>All values are parsed using the standard QemuOpts parsing. This allows the user
|
||
to specify any values in any format supported. By default the values
|
||
will be parsed as decimal. To use hex values the user should prefix the number
|
||
with a ‘0x’.</p>
|
||
<p>An example of loading an ELF file which CPU0 will boot is shown below:</p>
|
||
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="o">-</span><span class="n">device</span> <span class="n">loader</span><span class="p">,</span><span class="n">file</span><span class="o">=./</span><span class="n">images</span><span class="o">/</span><span class="n">boot</span><span class="o">.</span><span class="n">elf</span><span class="p">,</span><span class="n">cpu</span><span class="o">-</span><span class="n">num</span><span class="o">=</span><span class="mi">0</span>
|
||
</pre></div>
|
||
</div>
|
||
</section>
|
||
<section id="restrictions-and-todos">
|
||
<h2>Restrictions and ToDos<a class="headerlink" href="#restrictions-and-todos" title="Link to this heading"></a></h2>
|
||
<p>At the moment it is just assumed that if you specify a cpu-num then
|
||
you want to set the PC as well. This might not always be the case. In
|
||
future the internal state ‘set_pc’ (which exists in the generic loader
|
||
now) should be exposed to the user so that they can choose if the PC
|
||
is set or not.</p>
|
||
</section>
|
||
</section>
|
||
|
||
|
||
</div>
|
||
</div>
|
||
<footer><div class="rst-footer-buttons" role="navigation" aria-label="Footer">
|
||
<a href="linuxboot.html" class="btn btn-neutral float-left" title="Direct Linux Boot" accesskey="p" rel="prev"><span class="fa fa-arrow-circle-left" aria-hidden="true"></span> Previous</a>
|
||
<a href="guest-loader.html" class="btn btn-neutral float-right" title="Guest Loader" accesskey="n" rel="next">Next <span class="fa fa-arrow-circle-right" aria-hidden="true"></span></a>
|
||
</div>
|
||
|
||
<hr/>
|
||
|
||
<div role="contentinfo">
|
||
<p>© Copyright 2025, The QEMU Project Developers.</p>
|
||
</div>
|
||
|
||
Built with <a href="https://www.sphinx-doc.org/">Sphinx</a> using a
|
||
<a href="https://github.com/readthedocs/sphinx_rtd_theme">theme</a>
|
||
provided by <a href="https://readthedocs.org">Read the Docs</a>.
|
||
|
||
|
||
<!-- Empty para to force a blank line after "Built with Sphinx ..." -->
|
||
<p></p>
|
||
|
||
<p>This documentation is for QEMU version 8.2.2.</p>
|
||
|
||
|
||
<p><a href="../about/license.html">QEMU and this manual are released under the
|
||
GNU General Public License, version 2.</a></p>
|
||
|
||
|
||
|
||
|
||
</footer>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
</div>
|
||
<script>
|
||
jQuery(function () {
|
||
SphinxRtdTheme.Navigation.enable(true);
|
||
});
|
||
</script>
|
||
|
||
</body>
|
||
</html> |