about summary refs log blame commit diff stats
path: root/html/mu-init.subx.html
blob: 324210e41214f8ed8e8d891ff558a8d0e8093465 (plain) (tree)


























































                                                                                                                                            
                                                                                                                                               
                                                                                                                                             
                                                                                                              








                                                                                                                                                     
                                                                                                                       










                                                                                                                                                                                                                                                                      
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>Mu - mu-init.subx</title>
<meta name="Generator" content="Vim/8.1">
<meta name="plugin-version" content="vim8.1_v1">
<meta name="syntax" content="none">
<meta name="settings" content="number_lines,use_css,pre_wrap,no_foldcolumn,expand_tabs,line_ids,prevent_copy=">
<meta name="colorscheme" content="minimal-light">
<style type="text/css">
<!--
pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #c6c6c6; }
body { font-size:12pt; font-family: monospace; color: #000000; background-color: #c6c6c6; }
a { color:inherit; }
* { font-size:12pt; font-size: 1em; }
.subxComment { color: #005faf; }
.LineNr { }
.SpecialChar { color: #d70000; }
-->
</style>

<script type='text/javascript'>
<!--

/* function to open any folds containing a jumped-to line before jumping to it */
function JumpToLine()
{
  var lineNum;
  lineNum = window.location.hash;
  lineNum = lineNum.substr(1); /* strip off '#' */

  if (lineNum.indexOf('L') == -1) {
    lineNum = 'L'+lineNum;
  }
  var lineElem = document.getElementById(lineNum);
  /* Always jump to new location even if the line was hidden inside a fold, or
   * we corrected the raw number to a line ID.
   */
  if (lineElem) {
    lineElem.scrollIntoView(true);
  }
  return true;
}
if ('onhashchange' in window) {
  window.onhashchange = JumpToLine;
}

-->
</script>
</head>
<body onload='JumpToLine();'>
<a href='https://github.com/akkartik/mu/blob/master/mu-init.subx'>https://github.com/akkartik/mu/blob/master/mu-init.subx</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="subxComment"># Initialize the minimal runtime for Mu programs.</span>
<span id="L2" class="LineNr"> 2 </span><span class="subxComment">#</span>
<span id="L3" class="LineNr"> 3 </span><span class="subxComment"># See translate_mu for how this file is used.</span>
<span id="L4" class="LineNr"> 4 </span><span class="subxComment">#</span>
<span id="L5" class="LineNr"> 5 </span><span class="subxComment"># Mu programs start at a function called 'main' with this signature:</span>
<span id="L6" class="LineNr"> 6 </span><span class="subxComment">#   fn main args: (addr array kernel-string) -&gt; exit-status/ebx: int</span>
<span id="L7" class="LineNr"> 7 </span><span class="subxComment"># If your program doesn't need commandline arguments you can drop it:</span>
<span id="L8" class="LineNr"> 8 </span><span class="subxComment">#   fn main -&gt; exit-status/ebx: int</span>
<span id="L9" class="LineNr"> 9 </span><span class="subxComment">#</span>
<span id="L10" class="LineNr">10 </span><span class="subxComment"># Notice that the output must be in ebx, so that the exit() syscall can pick</span>
<span id="L11" class="LineNr">11 </span><span class="subxComment"># it up.</span>
<span id="L12" class="LineNr">12 </span>
<span id="L13" class="LineNr">13 </span>== code
<span id="L14" class="LineNr">14 </span>
<span id="L15" class="LineNr">15 </span><span class="SpecialChar">Entry</span>:
<span id="L16" class="LineNr">16 </span>    <span class="subxComment"># we don't use ebp in Entry; just initialize it</span>
<span id="L17" class="LineNr">17 </span>    bd/copy-to-ebp 0/imm32
<span id="L18" class="LineNr">18 </span>    <span class="subxComment"># var args/eax: (addr array kernel-string)</span>
<span id="L19" class="LineNr">19 </span>    89/&lt;- %eax 4/r32/esp
<span id="L20" class="LineNr">20 </span>    <span class="subxComment"># initialize the heap</span>
<span id="L21" class="LineNr">21 </span>    (<a href='053new-segment.subx.html#L41'>new-segment</a> *<span class="SpecialChar"><a href='069allocate.subx.html#L29'>Heap-size</a></span> <span class="SpecialChar"><a href='069allocate.subx.html#L22'>Heap</a></span>)
<span id="L22" class="LineNr">22 </span>    <span class="subxComment"># run Mu program</span>
<span id="L23" class="LineNr">23 </span>    (<a href='mu-init-test.subx.html#L7'>main</a> %eax)
<span id="L24" class="LineNr">24 </span>    <span class="subxComment"># exit</span>
<span id="L25" class="LineNr">25 </span>    (syscall_exit)
</pre>
</body>
</html>
<!-- vim: set foldmethod=manual : -->