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UBLIC "-//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 : -->