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
|
<!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/019functions.cc</title>
<meta name="Generator" content="Vim/8.0">
<meta name="plugin-version" content="vim7.4_v2">
<meta name="syntax" content="cpp">
<meta name="settings" content="number_lines,use_css,pre_wrap,no_foldcolumn,expand_tabs,line_ids,prevent_copy=">
<meta name="colorscheme" content="minimal">
<style type="text/css">
<!--
pre { white-space: pre-wrap; 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; }
.CommentedCode { color: #6c6c6c; }
.traceContains { color: #008000; }
.PreProc { color:#800080; }
.LineNr { color:#444444; }
.Constant { color:#00a0a0; }
.Delimiter { color:#800080; }
.Special { color:#c00000; }
.Identifier { color:#c0a020; }
.Normal { color: #aaaaaa; background-color: #080808; padding-bottom: 1px; }
.Comment { color: #8080ff; }
.SalientComment { color: #00ffff; }
-->
</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();'>
<a href='https://github.com/akkartik/mu/blob/master/subx/019functions.cc'>https://github.com/akkartik/mu/blob/master/subx/019functions.cc</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="SalientComment">//:: call</span>
<span id="L2" class="LineNr"> 2 </span>
<span id="L3" class="LineNr"> 3 </span><span class="Delimiter">:(before "End Initialize Op Names")</span>
<span id="L4" class="LineNr"> 4 </span><a href='001help.cc.html#L253'>put_new</a><span class="Delimiter">(</span><span class="Special"><a href='010---vm.cc.html#L378'>Name</a></span><span class="Delimiter">,</span> <span class="Constant">"e8"</span><span class="Delimiter">,</span> <span class="Constant">"call disp32 (call)"</span><span class="Delimiter">);</span>
<span id="L5" class="LineNr"> 5 </span>
<span id="L6" class="LineNr"> 6 </span><span class="Delimiter">:(scenario call_disp32)</span>
<span id="L7" class="LineNr"> 7 </span><span class="Special">% Reg[ESP].u = 0x64;</span>
<span id="L8" class="LineNr"> 8 </span>== <span class="Constant">0x1</span>
<span id="L9" class="LineNr"> 9 </span><span class="Comment"># op ModR/M SIB displacement immediate</span>
<span id="L10" class="LineNr">10 </span> e8 a0 <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="Comment"># call function offset at 0x000000a0</span>
<span id="L11" class="LineNr">11 </span> <span class="Comment"># next EIP is 6</span>
<span id="L12" class="LineNr">12 </span><span class="traceContains">+run: call imm32 0x000000a0</span>
<span id="L13" class="LineNr">13 </span><span class="traceContains">+run: decrementing <a href='010---vm.cc.html#L17'>ESP</a> to 0x00000060</span>
<span id="L14" class="LineNr">14 </span><span class="traceContains">+run: pushing value 0x00000006</span>
<span id="L15" class="LineNr">15 </span><span class="traceContains">+run: jumping to 0x000000a6</span>
<span id="L16" class="LineNr">16 </span>
<span id="L17" class="LineNr">17 </span><span class="Delimiter">:(before "End Single-Byte Opcodes")</span>
<span id="L18" class="LineNr">18 </span><span class="Normal">case</span> <span class="Constant">0xe8</span>: <span class="Delimiter">{</span> <span class="Comment">// call disp32 relative to next EIP</span>
<span id="L19" class="LineNr">19 </span> <span class="Normal">const</span> <span class="Normal">int32_t</span> offset = <a href='011run.cc.html#L343'>next32</a><span class="Delimiter">();</span>
<span id="L20" class="LineNr">20 </span> <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"call imm32 0x"</span> << <a href='010---vm.cc.html#L413'>HEXWORD</a> << offset << end<span class="Delimiter">();</span>
<span id="L21" class="LineNr">21 </span><span class="CommentedCode">//? cerr << "push: EIP: " << EIP << " => " << Reg[ESP].u << '\n';</span>
<span id="L22" class="LineNr">22 </span> <a href='012elf.cc.html#L89'>push</a><span class="Delimiter">(</span><a href='010---vm.cc.html#L29'>EIP</a><span class="Delimiter">);</span>
<span id="L23" class="LineNr">23 </span> <a href='010---vm.cc.html#L29'>EIP</a> += offset<span class="Delimiter">;</span>
<span id="L24" class="LineNr">24 </span> <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"jumping to 0x"</span> << <a href='010---vm.cc.html#L413'>HEXWORD</a> << <a href='010---vm.cc.html#L29'>EIP</a> << end<span class="Delimiter">();</span>
<span id="L25" class="LineNr">25 </span> <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L26" class="LineNr">26 </span><span class="Delimiter">}</span>
<span id="L27" class="LineNr">27 </span>
<span id="L28" class="LineNr">28 </span><span class="Comment">//:</span>
<span id="L29" class="LineNr">29 </span>
<span id="L30" class="LineNr">30 </span><span class="Delimiter">:(scenario call_r32)</span>
<span id="L31" class="LineNr">31 </span><span class="Special">% Reg[ESP].u = 0x64;</span>
<span id="L32" class="LineNr">32 </span><span class="Special">% Reg[EBX].u = 0x000000a0;</span>
<span id="L33" class="LineNr">33 </span>== <span class="Constant">0x1</span>
<span id="L34" class="LineNr">34 </span><span class="Comment"># op ModR/M SIB displacement immediate</span>
<span id="L35" class="LineNr">35 </span> ff d3 <span class="Comment"># call function offset at EBX</span>
<span id="L36" class="LineNr">36 </span> <span class="Comment"># next EIP is 3</span>
<span id="L37" class="LineNr">37 </span><span class="traceContains">+run: call to r/m32</span>
<span id="L38" class="LineNr">38 </span><span class="traceContains">+run: r/m32 is <a href='010---vm.cc.html#L16'>EBX</a></span>
<span id="L39" class="LineNr">39 </span><span class="traceContains">+run: decrementing <a href='010---vm.cc.html#L17'>ESP</a> to 0x00000060</span>
<span id="L40" class="LineNr">40 </span><span class="traceContains">+run: pushing value 0x00000003</span>
<span id="L41" class="LineNr">41 </span><span class="traceContains">+run: jumping to 0x000000a3</span>
<span id="L42" class="LineNr">42 </span>
<span id="L43" class="LineNr">43 </span><span class="Delimiter">:(before "End Op ff Subops")</span>
<span id="L44" class="LineNr">44 </span><span class="Normal">case</span> <span class="Constant">2</span>: <span class="Delimiter">{</span> <span class="Comment">// call function pointer at r/m32</span>
<span id="L45" class="LineNr">45 </span> <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"call to r/m32"</span> << end<span class="Delimiter">();</span>
<span id="L46" class="LineNr">46 </span> <span class="Normal">const</span> <span class="Normal">int32_t</span>* offset = <a href='013direct_addressing.cc.html#L31'>effective_address</a><span class="Delimiter">(</span>modrm<span class="Delimiter">);</span>
<span id="L47" class="LineNr">47 </span> <a href='012elf.cc.html#L89'>push</a><span class="Delimiter">(</span><a href='010---vm.cc.html#L29'>EIP</a><span class="Delimiter">);</span>
<span id="L48" class="LineNr">48 </span> <a href='010---vm.cc.html#L29'>EIP</a> += *offset<span class="Delimiter">;</span>
<span id="L49" class="LineNr">49 </span> <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"jumping to 0x"</span> << <a href='010---vm.cc.html#L413'>HEXWORD</a> << <a href='010---vm.cc.html#L29'>EIP</a> << end<span class="Delimiter">();</span>
<span id="L50" class="LineNr">50 </span> <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L51" class="LineNr">51 </span><span class="Delimiter">}</span>
<span id="L52" class="LineNr">52 </span>
<span id="L53" class="LineNr">53 </span><span class="Delimiter">:(scenario call_mem_at_r32)</span>
<span id="L54" class="LineNr">54 </span><span class="Special">% Reg[ESP].u = 0x64;</span>
<span id="L55" class="LineNr">55 </span><span class="Special">% Reg[EBX].u = 0x2000;</span>
<span id="L56" class="LineNr">56 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span>
<span id="L57" class="LineNr">57 </span><span class="Comment"># op ModR/M SIB displacement immediate</span>
<span id="L58" class="LineNr">58 </span> ff <span class="Constant">13</span> <span class="Comment"># call function offset at *EBX</span>
<span id="L59" class="LineNr">59 </span> <span class="Comment"># next EIP is 3</span>
<span id="L60" class="LineNr">60 </span>== <span class="Constant">0x2000</span> <span class="Comment"># data segment</span>
<span id="L61" class="LineNr">61 </span>a0 <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="Comment"># 0xa0</span>
<span id="L62" class="LineNr">62 </span><span class="traceContains">+run: call to r/m32</span>
<span id="L63" class="LineNr">63 </span><span class="traceContains">+run: effective address is 0x00002000 (EBX)</span>
<span id="L64" class="LineNr">64 </span><span class="traceContains">+run: decrementing <a href='010---vm.cc.html#L17'>ESP</a> to 0x00000060</span>
<span id="L65" class="LineNr">65 </span><span class="traceContains">+run: pushing value 0x00000003</span>
<span id="L66" class="LineNr">66 </span><span class="traceContains">+run: jumping to 0x000000a3</span>
<span id="L67" class="LineNr">67 </span>
<span id="L68" class="LineNr">68 </span><span class="SalientComment">//:: ret</span>
<span id="L69" class="LineNr">69 </span>
<span id="L70" class="LineNr">70 </span><span class="Delimiter">:(before "End Initialize Op Names")</span>
<span id="L71" class="LineNr">71 </span><a href='001help.cc.html#L253'>put_new</a><span class="Delimiter">(</span><span class="Special"><a href='010---vm.cc.html#L378'>Name</a></span><span class="Delimiter">,</span> <span class="Constant">"c3"</span><span class="Delimiter">,</span> <span class="Constant">"return from most recent unfinished call (ret)"</span><span class="Delimiter">);</span>
<span id="L72" class="LineNr">72 </span>
<span id="L73" class="LineNr">73 </span><span class="Delimiter">:(scenario ret)</span>
<span id="L74" class="LineNr">74 </span><span class="Special">% Reg[ESP].u = 0x2000;</span>
<span id="L75" class="LineNr">75 </span>== <span class="Constant">0x1</span> <span class="Comment"># code segment</span>
<span id="L76" class="LineNr">76 </span><span class="Comment"># op ModR/M SIB displacement immediate</span>
<span id="L77" class="LineNr">77 </span> c3
<span id="L78" class="LineNr">78 </span>== <span class="Constant">0x2000</span> <span class="Comment"># data segment</span>
<span id="L79" class="LineNr">79 </span><span class="Constant">10</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="PreProc">0</span><span class="Constant">0</span> <span class="Comment"># 0x10</span>
<span id="L80" class="LineNr">80 </span><span class="traceContains">+run: return</span>
<span id="L81" class="LineNr">81 </span><span class="traceContains">+run: popping value 0x00000010</span>
<span id="L82" class="LineNr">82 </span><span class="traceContains">+run: jumping to 0x00000010</span>
<span id="L83" class="LineNr">83 </span>
<span id="L84" class="LineNr">84 </span><span class="Delimiter">:(before "End Single-Byte Opcodes")</span>
<span id="L85" class="LineNr">85 </span><span class="Normal">case</span> <span class="Constant">0xc3</span>: <span class="Delimiter">{</span> <span class="Comment">// return from a call</span>
<span id="L86" class="LineNr">86 </span> <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"return"</span> << end<span class="Delimiter">();</span>
<span id="L87" class="LineNr">87 </span> <a href='010---vm.cc.html#L29'>EIP</a> = <a href='013direct_addressing.cc.html#L788'>pop</a><span class="Delimiter">();</span>
<span id="L88" class="LineNr">88 </span> <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">90</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"jumping to 0x"</span> << <a href='010---vm.cc.html#L413'>HEXWORD</a> << <a href='010---vm.cc.html#L29'>EIP</a> << end<span class="Delimiter">();</span>
<span id="L89" class="LineNr">89 </span> <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L90" class="LineNr">90 </span><span class="Delimiter">}</span>
</pre>
</body>
</html>
<!-- vim: set foldmethod=manual : -->
|