about summary refs log tree commit diff stats
path: root/html/subx/examples/ex6.subx.html
blob: a987f60cfe49e6e2200a279abad99f8bc7f76355 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
<!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/examples/ex6.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">
<style type="text/css">
<!--
pre { font-family: monospace; color: #aaaaaa; background-color: #080808; }
body { font-size:12pt; font-family: monospace; color: #aaaaaa; background-color: #080808; }
.subxS2Comment a { color:inherit; }
.subxS1Comment a { color:inherit; }
.subxComment a { color:inherit; }
.subxH2Comment a { color:inherit; }
.subxH1Comment a { color:inherit; }
* { font-size:12pt; font-size: 1em; }
.subxComment { color:#16bfff; }
.subxS2Comment { color:#4466ff; }
.LineNr { color:#444444; }
.subxS1Comment { color:#2d8cff; }
.SpecialChar { color: #ff0000; }
.CommentedCode { color: #6c6c6c; }
-->
</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;
  }
  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><span class="subxComment"># Print out a (global variable) string to stdout.</span>
<span id="L2" class="LineNr"> 2 </span><span class="subxComment">#</span>
<span id="L3" class="LineNr"> 3 </span><span class="subxComment"># To run (from the subx directory):</span>
<span id="L4" class="LineNr"> 4 </span><span class="subxComment">#   $ subx translate examples/ex6.subx -o examples/ex6</span>
<span id="L5" class="LineNr"> 5 </span><span class="subxComment">#   $ subx run examples/ex6</span>
<span id="L6" class="LineNr"> 6 </span><span class="subxComment">#   Hello, world!</span>
<span id="L7" class="LineNr"> 7 </span>
<span id="L8" class="LineNr"> 8 </span>== code
<span id="L9" class="LineNr"> 9 </span><span class="subxComment">#   instruction                     effective address                                                   register    displacement    immediate</span>
<span id="L10" class="LineNr">10 </span><span class="subxS1Comment"># . op          subop               mod             rm32          base        index         scale       r32</span>
<span id="L11" class="LineNr">11 </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>
<span id="L12" class="LineNr">12 </span>
<span id="L13" class="LineNr">13 </span>    <span class="subxComment"># syscall(write, stdout, X, Size)</span>
<span id="L14" class="LineNr">14 </span>    <span class="subxS1Comment"># . fd = 1 (stdout)</span>
<span id="L15" class="LineNr">15 </span>    bb/copy-to-EBX  1/imm32
<span id="L16" class="LineNr">16 </span>    <span class="subxS1Comment"># . initialize X (location to write result to)</span>
<span id="L17" class="LineNr">17 </span>    b9/copy-to-ECX <span class="SpecialChar"> X</span>/imm32
<span id="L18" class="LineNr">18 </span>    <span class="subxS1Comment"># . initialize Size</span>
<span id="L19" class="LineNr">19 </span>    8b/copy                         0/mod/indirect  5/rm32/.disp32           <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>          2/r32/EDX  <span class="SpecialChar"> Size</span>/disp32    <span class="CommentedCode"> . </span>                <span class="subxComment"># copy *Size to EDX</span>
<span id="L20" class="LineNr">20 </span>    <span class="subxS1Comment"># . syscall</span>
<span id="L21" class="LineNr">21 </span>    b8/copy-to-EAX  4/imm32/write
<span id="L22" class="LineNr">22 </span>    cd/syscall  0x80/imm8
<span id="L23" class="LineNr">23 </span>
<span id="L24" class="LineNr">24 </span>    <span class="subxComment"># syscall(exit, EBX)</span>
<span id="L25" class="LineNr">25 </span>    b8/copy-to-EAX  1/imm32/exit
<span id="L26" class="LineNr">26 </span>    cd/syscall  0x80/imm8
<span id="L27" class="LineNr">27 </span>
<span id="L28" class="LineNr">28 </span>== data
<span id="L29" class="LineNr">29 </span>
<span id="L30" class="LineNr">30 </span><span class="SpecialChar">Size</span>:  <span class="subxComment"># size of string</span>
<span id="L31" class="LineNr">31 </span>    0e 00 00 00  <span class="subxComment"># 14</span>
<span id="L32" class="LineNr">32 </span><span class="SpecialChar">X</span>:  <span class="subxComment"># string to print</span>
<span id="L33" class="LineNr">33 </span>    48 65 6c 6c 6f 2c 20 77 6f 72 6c 64 21 0a       00
<span id="L34" class="LineNr">34 </span><span class="subxComment"># H  e  l  l  o  ,  ␣  w  o  r  l  d  !  newline  null</span>
<span id="L35" class="LineNr">35 </span>
<span id="L36" class="LineNr">36 </span><span class="subxS2Comment"># . . vim&#0058;nowrap:textwidth=0</span>
</pre>
</body>
</html>
<!-- vim: set foldmethod=manual : -->