88 lines
4.8 KiB
HTML
88 lines
4.8 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>Mu - linux/ex13.subx</title>
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<meta name="Generator" content="Vim/8.1">
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<meta name="plugin-version" content="vim8.1_v1">
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<meta name="syntax" content="none">
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<meta name="settings" content="number_lines,use_css,no_foldcolumn,expand_tabs,line_ids,prevent_copy=">
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<meta name="colorscheme" content="minimal-light">
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<style type="text/css">
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a { color:inherit; }
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* { font-size:12pt; font-size: 1em; }
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.subxComment { color: #005faf; }
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.subxS2Comment { color: #8a8a8a; }
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.LineNr { }
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.subxS1Comment { color: #0000af; }
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.SpecialChar { color: #d70000; }
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.Normal { color: #000000; background-color: #ffffd7; padding-bottom: 1px; }
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.Constant { color: #008787; }
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<script type='text/javascript'>
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<!--
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/* function to open any folds containing a jumped-to line before jumping to it */
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function JumpToLine()
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{
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var lineNum;
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lineNum = window.location.hash;
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lineNum = lineNum.substr(1); /* strip off '#' */
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if (lineNum.indexOf('L') == -1) {
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lineNum = 'L'+lineNum;
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}
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var lineElem = document.getElementById(lineNum);
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/* Always jump to new location even if the line was hidden inside a fold, or
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* we corrected the raw number to a line ID.
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</head>
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<body onload='JumpToLine();'>
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<a href='https://github.com/akkartik/mu/blob/main/linux/ex13.subx'>https://github.com/akkartik/mu/blob/main/linux/ex13.subx</a>
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<pre id='vimCodeElement'>
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<span id="L1" class="LineNr"> 1 </span><span class="subxComment"># Compare 3 and 3.</span>
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<span id="L2" class="LineNr"> 2 </span><span class="subxComment">#</span>
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<span id="L3" class="LineNr"> 3 </span><span class="subxComment"># To run:</span>
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<span id="L4" class="LineNr"> 4 </span><span class="subxComment"># $ bootstrap/bootstrap translate ex13.subx -o ex13</span>
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<span id="L5" class="LineNr"> 5 </span><span class="subxComment"># $ bootstrap/bootstrap run ex13</span>
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<span id="L6" class="LineNr"> 6 </span><span class="subxComment"># Expected result:</span>
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<span id="L7" class="LineNr"> 7 </span><span class="subxComment"># $ echo $?</span>
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<span id="L8" class="LineNr"> 8 </span><span class="subxComment"># 1</span>
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<span id="L9" class="LineNr"> 9 </span>
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<span id="L10" class="LineNr">10 </span>== code
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<span id="L11" class="LineNr">11 </span><span class="subxComment"># instruction effective address register displacement immediate</span>
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<span id="L12" class="LineNr">12 </span><span class="subxS1Comment"># . op subop mod rm32 base index scale r32</span>
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<span id="L13" class="LineNr">13 </span><span class="subxS1Comment"># . 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes</span>
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<span id="L14" class="LineNr">14 </span>
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<span id="L15" class="LineNr">15 </span><span class="SpecialChar">Entry</span>:
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<span id="L16" class="LineNr">16 </span> b8/copy-to-eax 3/imm32
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<span id="L17" class="LineNr">17 </span> 3d/compare-eax-and 3/imm32
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<span id="L18" class="LineNr">18 </span> 0f 94/set-if-= 3/mod/direct 3/rm32/ebx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># set ebx to ZF</span>
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<span id="L19" class="LineNr">19 </span> 81 4/subop/and 3/mod/direct 3/rm32/ebx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xff/imm32 <span class="subxComment"># AND with eax</span>
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<span id="L20" class="LineNr">20 </span>
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<span id="L21" class="LineNr">21 </span><span class="Constant">$exit</span>:
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<span id="L22" class="LineNr">22 </span> <span class="subxComment"># exit(ebx)</span>
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<span id="L23" class="LineNr">23 </span> e8/call <a href='000init.subx.html#L18'>syscall_exit</a>/disp32
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<span id="L24" class="LineNr">24 </span>
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<span id="L25" class="LineNr">25 </span><span class="subxS2Comment"># . . vim:nowrap:textwidth=0</span>
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</pre>
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</body>
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</html>
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