about summary refs log tree commit diff stats
path: root/html/074write-stream-data.subx.html
blob: 85acd34a2ae526a68f860988cb87caa29e183d6f (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
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
<!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 - 074write-stream-data.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; }
.subxS2Comment { color: #8a8a8a; }
.LineNr { }
.subxS1Comment { color: #0000af; }
.subxFunction { color: #af5f00; text-decoration: underline; }
.Normal { color: #000000; background-color: #c6c6c6; padding-bottom: 1px; }
.Constant { color: #008787; }
.subxTest { color: #5f8700; }
-->
</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/074write-stream-data.subx'>https://github.com/akkartik/mu/blob/master/074write-stream-data.subx</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr">  1 </span>== code
<span id="L2" class="LineNr">  2 </span><span class="subxComment">#   instruction                     effective address                                                   register    displacement    immediate</span>
<span id="L3" class="LineNr">  3 </span><span class="subxS1Comment"># . op          subop               mod             rm32          base        index         scale       r32</span>
<span id="L4" class="LineNr">  4 </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="L5" class="LineNr">  5 </span>
<span id="L6" class="LineNr">  6 </span><span class="subxComment"># write an entire stream's contents to a buffered-file</span>
<span id="L7" class="LineNr">  7 </span><span class="subxComment"># ways to do this:</span>
<span id="L8" class="LineNr">  8 </span><span class="subxComment">#   - construct a 'maximal slice' and pass it to write-slice-buffered</span>
<span id="L9" class="LineNr">  9 </span><span class="subxComment">#   - flush the buffered-file and pass the stream directly to its fd (disabling buffering)</span>
<span id="L10" class="LineNr"> 10 </span><span class="subxComment"># we'll go with the first way for now</span>
<span id="L11" class="LineNr"> 11 </span><span class="subxFunction">write-stream-data</span>:  <span class="subxComment"># f : (address buffered-file), s : (address stream)</span>
<span id="L12" class="LineNr"> 12 </span>    <span class="subxS1Comment"># . prologue</span>
<span id="L13" class="LineNr"> 13 </span>    55/push-ebp
<span id="L14" class="LineNr"> 14 </span>    89/copy                         3/mod/direct    5/rm32/ebp   <span class="Normal"> . </span>         <span class="Normal"> . </span>           <span class="Normal"> . </span>          4/r32/esp  <span class="Normal"> . </span>             <span class="Normal"> . </span>                <span class="subxComment"># copy esp to ebp</span>
<span id="L15" class="LineNr"> 15 </span>    <span class="subxS1Comment"># . save registers</span>
<span id="L16" class="LineNr"> 16 </span>    50/push-eax
<span id="L17" class="LineNr"> 17 </span>    51/push-ecx
<span id="L18" class="LineNr"> 18 </span>    56/push-esi
<span id="L19" class="LineNr"> 19 </span>    <span class="subxComment"># esi = s</span>
<span id="L20" class="LineNr"> 20 </span>    8b/copy                         1/mod/*+disp8   5/rm32/ebp   <span class="Normal"> . </span>         <span class="Normal"> . </span>           <span class="Normal"> . </span>          6/r32/esi   0xc/disp8      <span class="Normal"> . </span>                <span class="subxComment"># copy *(ebp+12) to esi</span>
<span id="L21" class="LineNr"> 21 </span>    <span class="subxComment"># var slice/ecx = {s-&gt;data, s-&gt;data + s-&gt;write}</span>
<span id="L22" class="LineNr"> 22 </span>    <span class="subxS1Comment"># . push s-&gt;data + s-&gt;write</span>
<span id="L23" class="LineNr"> 23 </span>    8b/copy                         0/mod/indirect  6/rm32/esi   <span class="Normal"> . </span>         <span class="Normal"> . </span>           <span class="Normal"> . </span>          0/r32/eax  <span class="Normal"> . </span>             <span class="Normal"> . </span>                <span class="subxComment"># copy *esi to eax</span>
<span id="L24" class="LineNr"> 24 </span>    8d/copy-address                 1/mod/*+disp8   4/rm32/sib    6/base/esi  0/index/eax  <span class="Normal"> . </span>          0/r32/eax   0xc/disp8      <span class="Normal"> . </span>                <span class="subxComment"># copy esi+eax+12 to eax</span>
<span id="L25" class="LineNr"> 25 </span>    50/push-eax
<span id="L26" class="LineNr"> 26 </span>    <span class="subxS1Comment"># . push s-&gt;data</span>
<span id="L27" class="LineNr"> 27 </span>    8d/copy-address                 1/mod/*+disp8   6/rm32/esi   <span class="Normal"> . </span>         <span class="Normal"> . </span>           <span class="Normal"> . </span>          0/r32/eax   0xc/disp8      <span class="Normal"> . </span>                <span class="subxComment"># copy esi+12 to eax</span>
<span id="L28" class="LineNr"> 28 </span>    50/push-eax
<span id="L29" class="LineNr"> 29 </span>    <span class="subxS1Comment"># . ecx = esp</span>
<span id="L30" class="LineNr"> 30 </span>    89/copy                         3/mod/direct    1/rm32/ecx   <span class="Normal"> . </span>         <span class="Normal"> . </span>           <span class="Normal"> . </span>          4/r32/esp  <span class="Normal"> . </span>             <span class="Normal"> . </span>                <span class="subxComment"># copy esp to ecx</span>
<span id="L31" class="LineNr"> 31 </span>    <span class="subxComment"># write-slice-buffered(f, slice)</span>
<span id="L32" class="LineNr"> 32 </span>    <span class="subxS2Comment"># . . push args</span>
<span id="L33" class="LineNr"> 33 </span>    51/push-ecx
<span id="L34" class="LineNr"> 34 </span>    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp   <span class="Normal"> . </span>         <span class="Normal"> . </span>           <span class="Normal"> . </span>         <span class="Normal"> . </span>          8/disp8        <span class="Normal"> . </span>                <span class="subxComment"># push *(ebp+8)</span>
<span id="L35" class="LineNr"> 35 </span>    <span class="subxS2Comment"># . . call</span>
<span id="L36" class="LineNr"> 36 </span>    e8/call  <a href='072slice.subx.html#L878'>write-slice-buffered</a>/disp32
<span id="L37" class="LineNr"> 37 </span>    <span class="subxS2Comment"># . . discard args</span>
<span id="L38" class="LineNr"> 38 </span>    81          0/subop/add         3/mod/direct    4/rm32/esp   <span class="Normal"> . </span>         <span class="Normal"> . </span>           <span class="Normal"> . </span>         <span class="Normal"> . </span>         <span class="Normal"> . </span>              8/imm32           <span class="subxComment"># add to esp</span>
<span id="L39" class="LineNr"> 39 </span><span class="Constant">$write-stream-data:end</span>:
<span id="L40" class="LineNr"> 40 </span>    <span class="subxS1Comment"># . restore locals</span>
<span id="L41" class="LineNr"> 41 </span>    81          0/subop/add         3/mod/direct    4/rm32/esp   <span class="Normal"> . </span>         <span class="Normal"> . </span>           <span class="Normal"> . </span>         <span class="Normal"> . </span>         <span class="Normal"> . </span>              8/imm32           <span class="subxComment"># add to esp</span>
<span id="L42" class="LineNr"> 42 </span>    <span class="subxS1Comment"># . restore registers</span>
<span id="L43" class="LineNr"> 43 </span>    5e/pop-to-esi
<span id="L44" class="LineNr"> 44 </span>    59/pop-to-ecx
<span id="L45" class="LineNr"> 45 </span>    58/pop-to-eax
<span id="L46" class="LineNr"> 46 </span>    <span class="subxS1Comment"># . epilogue</span>
<span id="L47" class="LineNr"> 47 </span>    89/copy                         3/mod/direct    4/rm32/esp   <span class="Normal"> . </span>         <span class="Normal"> . </span>           <span class="Normal"> . </span>          5/r32/ebp  <span class="Normal"> . </span>             <span class="Normal"> . </span>                <span class="subxComment"># copy ebp to esp</span>
<span id="L48" class="LineNr"> 48 </span>    5d/pop-to-ebp
<span id="L49" class="LineNr"> 49 </span>    c3/return
<span id="L50" class="LineNr"> 50 </span>
<span id="L51" class="LineNr"> 51 </span><span class="subxTest">test-write-stream-data</span>:
<span id="L52" class="LineNr"> 52 </span>    <span class="subxS1Comment"># . prologue</span>
<span id="L53" class="LineNr"> 53 </span>    55/push-ebp
<span id="L54" class="LineNr"> 54 </span>    89/copy                         3/mod/direct    5/rm32/ebp   <span class="Normal"> . </span>         <span class="Normal"> . </span>           <span class="Normal"> . </span>          4/r32/esp  <span class="Normal"> . </span>             <span class="Normal"> . </span>                <span class="subxComment"># copy esp to ebp</span>
<span id="L55" class="LineNr"> 55 </span>    <span class="subxComment"># setup</span>
<span id="L56" class="LineNr"> 56 </span>    <span class="subxS1Comment"># . clear-stream(_test-output-stream)</span>
<span id="L57" class="LineNr"> 57 </span>    <span class="subxS2Comment"># . . push args</span>
<span id="L58" class="LineNr"> 58 </span>    68/push  <a href='064write-byte.subx.html#L286'>_test-output-stream</a>/imm32
<span id="L59" class="LineNr"> 59 </span>    <span class="subxS2Comment"># . . call</span>
<span id="L60" class="LineNr"> 60 </span>    e8/call  <a href='055stream.subx.html#L17'>clear-stream</a>/disp32
<span id="L61" class="LineNr"> 61 </span>    <span class="subxS2Comment"># . . discard args</span>
<span id="L62" class="LineNr"> 62 </span>    81          0/subop/add         3/mod/direct    4/rm32/esp   <span class="Normal"> . </span>         <span class="Normal"> . </span>           <span class="Normal"> . </span>         <span class="Normal"> . </span>         <span class="Normal"> . </span>              4/imm32           <span class="subxComment"># add to esp</span>
<span id="L63" class="LineNr"> 63 </span>    <span class="subxS1Comment"># . clear-stream(_test-output-buffered-file-&gt;buffer)</span>
<span id="L64" class="LineNr"> 64 </span>    <span class="subxS2Comment"># . . push args</span>
<span id="L65" class="LineNr"> 65 </span>    68/push  <a href='064write-byte.subx.html#L331'>_test-output-buffered-file-&gt;buffer</a>/imm32
<span id="L66" class="LineNr"> 66 </span>    <span class="subxS2Comment"># . . call</span>
<span id="L67" class="LineNr"> 67 </span>    e8/call  <a href='055stream.subx.html#L17'>clear-stream</a>/disp32
<span id="L68" class="LineNr"> 68 </span>    <span class="subxS2Comment"># . . discard args</span>
<span id="L69" class="LineNr"> 69 </span>    81          0/subop/add         3/mod/direct    4/rm32/esp   <span class="Normal"> . </span>         <span class="Normal"> . </span>           <span class="Normal"> . </span>         <span class="Normal"> . </span>         <span class="Normal"> . </span>              4/imm32           <span class="subxComment"># add to esp</span>
<span id="L70" class="LineNr"> 70 </span>    <span class="subxS1Comment"># . clear-stream(_test-input-stream)</span>
<span id="L71" class="LineNr"> 71 </span>    <span class="subxS2Comment"># . . push args</span>
<span id="L72" class="LineNr"> 72 </span>    68/push  <a href='061read-byte.subx.html#L288'>_test-input-stream</a>/imm32
<span id="L73" class="LineNr"> 73 </span>    <span class="subxS2Comment"># . . call</span>
<span id="L74" class="LineNr"> 74 </span>    e8/call  <a href='055stream.subx.html#L17'>clear-stream</a>/disp32
<span id="L75" class="LineNr"> 75 </span>    <span class="subxS2Comment"># . . discard args</span>
<span id="L76" class="LineNr"> 76 </span>    81          0/subop/add         3/mod/direct    4/rm32/esp   <span class="Normal"> . </span>         <span class="Normal"> . </span>           <span class="Normal"> . </span>         <span class="Normal"> . </span>         <span class="Normal"> . </span>              4/imm32           <span class="subxComment"># add to esp</span>
<span id="L77" class="LineNr"> 77 </span>    <span class="subxComment"># initialize input</span>
<span id="L78" class="LineNr"> 78 </span>    <span class="subxS1Comment"># . write(_test-input-stream, &quot;abcd&quot;)</span>
<span id="L79" class="LineNr"> 79 </span>    <span class="subxS2Comment"># . . push args</span>
<span id="L80" class="LineNr"> 80 </span>    68/push  <span class="Constant">&quot;abcd&quot;</span>/imm32
<span id="L81" class="LineNr"> 81 </span>    68/push  <a href='061read-byte.subx.html#L288'>_test-input-stream</a>/imm32
<span id="L82" class="LineNr"> 82 </span>    <span class="subxS2Comment"># . . call</span>
<span id="L83" class="LineNr"> 83 </span>    e8/call  <a href='057write.subx.html#L24'>write</a>/disp32
<span id="L84" class="LineNr"> 84 </span>    <span class="subxS2Comment"># . . discard args</span>
<span id="L85" class="LineNr"> 85 </span>    81          0/subop/add         3/mod/direct    4/rm32/esp   <span class="Normal"> . </span>         <span class="Normal"> . </span>           <span class="Normal"> . </span>         <span class="Normal"> . </span>         <span class="Normal"> . </span>              8/imm32           <span class="subxComment"># add to esp</span>
<span id="L86" class="LineNr"> 86 </span>    <span class="subxComment"># write-stream-data(_test-output-buffered-file, _test-input-stream)</span>
<span id="L87" class="LineNr"> 87 </span>    <span class="subxS2Comment"># . . push args</span>
<span id="L88" class="LineNr"> 88 </span>    68/push  <a href='061read-byte.subx.html#L288'>_test-input-stream</a>/imm32
<span id="L89" class="LineNr"> 89 </span>    68/push  <a href='064write-byte.subx.html#L328'>_test-output-buffered-file</a>/imm32
<span id="L90" class="LineNr"> 90 </span>    <span class="subxS2Comment"># . . call</span>
<span id="L91" class="LineNr"> 91 </span>    e8/call  <a href='074write-stream-data.subx.html#L11'>write-stream-data</a>/disp32
<span id="L92" class="LineNr"> 92 </span>    <span class="subxS2Comment"># . . discard args</span>
<span id="L93" class="LineNr"> 93 </span>    81          0/subop/add         3/mod/direct    4/rm32/esp   <span class="Normal"> . </span>         <span class="Normal"> . </span>           <span class="Normal"> . </span>         <span class="Normal"> . </span>         <span class="Normal"> . </span>              8/imm32           <span class="subxComment"># add to esp</span>
<span id="L94" class="LineNr"> 94 </span>    <span class="subxComment"># check that the write happened as expected</span>
<span id="L95" class="LineNr"> 95 </span>    <span class="subxS1Comment"># . flush(_test-output-buffered-file)</span>
<span id="L96" class="LineNr"> 96 </span>    <span class="subxS2Comment"># . . push args</span>
<span id="L97" class="LineNr"> 97 </span>    68/push  <a href='064write-byte.subx.html#L328'>_test-output-buffered-file</a>/imm32
<span id="L98" class="LineNr"> 98 </span>    <span class="subxS2Comment"># . . call</span>
<span id="L99" class="LineNr"> 99 </span>    e8/call  <a href='064write-byte.subx.html#L81'>flush</a>/disp32
<span id="L100" class="LineNr">100 </span>    <span class="subxS2Comment"># . . discard args</span>
<span id="L101" class="LineNr">101 </span>    81          0/subop/add         3/mod/direct    4/rm32/esp   <span class="Normal"> . </span>         <span class="Normal"> . </span>           <span class="Normal"> . </span>         <span class="Normal"> . </span>         <span class="Normal"> . </span>              4/imm32           <span class="subxComment"># add to esp</span>
<span id="L102" class="LineNr">102 </span>    <span class="subxS1Comment"># . check-stream-equal(_test-output-stream, &quot;abcd&quot;, msg)</span>
<span id="L103" class="LineNr">103 </span>    <span class="subxS2Comment"># . . push args</span>
<span id="L104" class="LineNr">104 </span>    68/push  <span class="Constant">&quot;F - test-write-stream-data&quot;</span>/imm32
<span id="L105" class="LineNr">105 </span>    68/push  <span class="Constant">&quot;abcd&quot;</span>/imm32
<span id="L106" class="LineNr">106 </span>    68/push  <a href='064write-byte.subx.html#L286'>_test-output-stream</a>/imm32
<span id="L107" class="LineNr">107 </span>    <span class="subxS2Comment"># . . call</span>
<span id="L108" class="LineNr">108 </span>    e8/call  <a href='058stream-equal.subx.html#L193'>check-stream-equal</a>/disp32
<span id="L109" class="LineNr">109 </span>    <span class="subxS2Comment"># . . discard args</span>
<span id="L110" class="LineNr">110 </span>    81          0/subop/add         3/mod/direct    4/rm32/esp   <span class="Normal"> . </span>         <span class="Normal"> . </span>           <span class="Normal"> . </span>         <span class="Normal"> . </span>         <span class="Normal"> . </span>              0xc/imm32         <span class="subxComment"># add to esp</span>
<span id="L111" class="LineNr">111 </span>    <span class="subxS1Comment"># . epilogue</span>
<span id="L112" class="LineNr">112 </span>    89/copy                         3/mod/direct    4/rm32/esp   <span class="Normal"> . </span>         <span class="Normal"> . </span>           <span class="Normal"> . </span>          5/r32/ebp  <span class="Normal"> . </span>             <span class="Normal"> . </span>                <span class="subxComment"># copy ebp to esp</span>
<span id="L113" class="LineNr">113 </span>    5d/pop-to-ebp
<span id="L114" class="LineNr">114 </span>    c3/return
</pre>
</body>
</html>
<!-- vim: set foldmethod=manual : -->