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authorKartik Agaram <vc@akkartik.com>2018-10-02 01:21:01 -0700
committerKartik Agaram <vc@akkartik.com>2018-10-02 01:21:32 -0700
commit5a2cb154eb016aa8b84ad939f63eb56dd7a0a90f (patch)
tree61701a7d8ec8bba5d9b7d5fc2d2e1496b74c5a0c /html/subx/050write_stderr.subx.html
parent29ab43973a2e9822d84b564e314b4af5c58c4684 (diff)
downloadmu-5a2cb154eb016aa8b84ad939f63eb56dd7a0a90f.tar.gz
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+<!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 - subx/050write_stderr.subx</title>
+<meta name="Generator" content="Vim/8.0">
+<meta name="plugin-version" content="vim7.4_v2">
+<meta name="syntax" content="none">
+<meta name="settings" content="number_lines,use_css,no_foldcolumn,expand_tabs,line_ids,prevent_copy=">
+<meta name="colorscheme" content="minimal">
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+<!--
+pre { font-family: monospace; color: #aaaaaa; background-color: #080808; }
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+a:hover { text-decoration: underline; }
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+.Comment { color: #9090ff; }
+.Comment a { color:#0000ee; text-decoration:underline; }
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+<!--
+
+/* function to open any folds containing a jumped-to line before jumping to it */
+function JumpToLine()
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+  var lineNum;
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+  lineNum = lineNum.substr(1); /* strip off '#' */
+
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+    lineNum = 'L'+lineNum;
+  }
+  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();'>
+<pre id='vimCodeElement'>
+<span id="L1" class="LineNr"> 1 </span>== code
+<span id="L2" class="LineNr"> 2 </span>
+<span id="L3" class="LineNr"> 3 </span><span class="Comment"># instruction                     effective address                                                   operand     displacement    immediate</span>
+<span id="L4" class="LineNr"> 4 </span><span class="Comment"># op          subop               mod             rm32          base        index         scale       r32</span>
+<span id="L5" class="LineNr"> 5 </span><span class="Comment"># 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>
+<span id="L6" class="LineNr"> 6 </span>
+<span id="L7" class="LineNr"> 7 </span>write_stderr:  <span class="Comment"># s : (address array byte) -&gt; &lt;void&gt;</span>
+<span id="L8" class="LineNr"> 8 </span>  <span class="Comment"># prolog</span>
+<span id="L9" class="LineNr"> 9 </span>  55/push-EBP
+<span id="L10" class="LineNr">10 </span>  89/copy                         3/mod/direct    5/rm32/EBP   <span class="Delimiter"> . </span>         <span class="Delimiter"> . </span>           <span class="Delimiter"> . </span>          4/r32/ESP  <span class="Delimiter"> . </span>             <span class="Delimiter"> . </span>                <span class="Comment"># copy ESP to EBP</span>
+<span id="L11" class="LineNr">11 </span>  <span class="Comment"># save registers</span>
+<span id="L12" class="LineNr">12 </span>  50/push-EAX
+<span id="L13" class="LineNr">13 </span>  51/push-ECX
+<span id="L14" class="LineNr">14 </span>  52/push-EDX
+<span id="L15" class="LineNr">15 </span>  53/push-EBX
+<span id="L16" class="LineNr">16 </span>  <span class="Comment"># write(2/stderr, (data) s+4, (size) *s)</span>
+<span id="L17" class="LineNr">17 </span>    <span class="Comment"># fd = 2 (stderr)</span>
+<span id="L18" class="LineNr">18 </span>  bb/copy                        <span class="Delimiter"> . </span>             <span class="Delimiter"> . </span>           <span class="Delimiter"> . </span>         <span class="Delimiter"> . </span>           <span class="Delimiter"> . </span>         <span class="Delimiter"> . </span>         <span class="Delimiter"> . </span>              2/imm32           <span class="Comment"># copy to EBX</span>
+<span id="L19" class="LineNr">19 </span>    <span class="Comment"># x = s+4</span>
+<span id="L20" class="LineNr">20 </span>  8b/copy                         1/mod/*+disp8   4/rm32/SIB    5/base/EBP  4/index/none <span class="Delimiter"> . </span>          1/r32/ECX   8/disp8        <span class="Delimiter"> . </span>                <span class="Comment"># copy *(EBP+8) to ECX</span>
+<span id="L21" class="LineNr">21 </span>  81          0/subop/add         3/mod/direct    1/rm32/ECX   <span class="Delimiter"> . </span>         <span class="Delimiter"> . </span>           <span class="Delimiter"> . </span>         <span class="Delimiter"> . </span>         <span class="Delimiter"> . </span>              4/imm32           <span class="Comment"># add to ECX</span>
+<span id="L22" class="LineNr">22 </span>    <span class="Comment"># size = *s</span>
+<span id="L23" class="LineNr">23 </span>  8b/copy                         1/mod/*+disp8   4/rm32/SIB    5/base/EBP  4/index/none <span class="Delimiter"> . </span>          2/r32/EDX   8/disp8        <span class="Delimiter"> . </span>                <span class="Comment"># copy *(EBP+8) to EDX</span>
+<span id="L24" class="LineNr">24 </span>  8b/copy                         0/mod/indirect  2/rm32/EDX   <span class="Delimiter"> . </span>         <span class="Delimiter"> . </span>           <span class="Delimiter"> . </span>          2/r32/EDX  <span class="Delimiter"> . </span>             <span class="Delimiter"> . </span>                <span class="Comment"># copy *EDX to EDX</span>
+<span id="L25" class="LineNr">25 </span>    <span class="Comment"># call write()</span>
+<span id="L26" class="LineNr">26 </span>  b8/copy                        <span class="Delimiter"> . </span>             <span class="Delimiter"> . </span>           <span class="Delimiter"> . </span>         <span class="Delimiter"> . </span>           <span class="Delimiter"> . </span>         <span class="Delimiter"> . </span>         <span class="Delimiter"> . </span>              4/imm32/write     <span class="Comment"># copy to EAX</span>
+<span id="L27" class="LineNr">27 </span>  cd/syscall  0x80/imm8
+<span id="L28" class="LineNr">28 </span>  <span class="Comment"># restore registers</span>
+<span id="L29" class="LineNr">29 </span>  5b/pop-to-EBX
+<span id="L30" class="LineNr">30 </span>  5a/pop-to-EDX
+<span id="L31" class="LineNr">31 </span>  59/pop-to-ECX
+<span id="L32" class="LineNr">32 </span>  58/pop-to-EAX
+<span id="L33" class="LineNr">33 </span>  <span class="Comment"># end</span>
+<span id="L34" class="LineNr">34 </span>  89/copy                         3/mod/direct    4/rm32/ESP   <span class="Delimiter"> . </span>         <span class="Delimiter"> . </span>           <span class="Delimiter"> . </span>          5/r32/EBP  <span class="Delimiter"> . </span>             <span class="Delimiter"> . </span>                <span class="Comment"># copy EBP to ESP</span>
+<span id="L35" class="LineNr">35 </span>  5d/pop-to-EBP
+<span id="L36" class="LineNr">36 </span>  c3/return
+<span id="L37" class="LineNr">37 </span>
+<span id="L38" class="LineNr">38 </span><span class="Comment"># vim&#0058;ft=subx:nowrap:tw&amp;</span>
+</pre>
+</body>
+</html>
+<!-- vim: set foldmethod=manual : -->

 

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