about summary refs log tree commit diff stats
path: root/html/subx/020syscalls.cc.html
blob: 7dba59602bd64ecff1405fb74a22b53b932b5351 (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
178
179
180
181
182
183
184
185
186
<!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/020syscalls.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; }
a { color:#eeeeee; text-decoration: none; }
a:hover { text-decoration: underline; }
* { font-size: 12pt; font-size: 1em; }
.PreProc { color: #800080; }
.LineNr { color: #444444; }
.Constant { color: #00a0a0; }
.Delimiter { color: #800080; }
.Identifier { color: #c0a020; }
.Normal { color: #aaaaaa; background-color: #080808; padding-bottom: 1px; }
.Comment { color: #9090ff; }
.Comment a { color:#0000ee; text-decoration:underline; }
.cSpecial { color: #008000; }
-->
</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="Delimiter">:(before &quot;End Initialize Op Names&quot;)</span>
<span id="L2" class="LineNr">  2 </span><a href='001help.cc.html#L253'>put_new</a><span class="Delimiter">(</span><a href='010---vm.cc.html#L369'>Name</a><span class="Delimiter">,</span> <span class="Constant">&quot;cd&quot;</span><span class="Delimiter">,</span> <span class="Constant">&quot;software interrupt (int)&quot;</span><span class="Delimiter">);</span>
<span id="L3" class="LineNr">  3 </span>
<span id="L4" class="LineNr">  4 </span><span class="Delimiter">:(before &quot;End Single-Byte Opcodes&quot;)</span>
<span id="L5" class="LineNr">  5 </span><span class="Normal">case</span> <span class="Constant">0xcd</span>: <span class="Delimiter">{</span>  <span class="Comment">// int imm8 (software interrupt)</span>
<span id="L6" class="LineNr">  6 </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">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;syscall&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L7" class="LineNr">  7 </span>  <span class="Normal">uint8_t</span> <a href='031check_operands.cc.html#L11'>code</a> = <a href='010---vm.cc.html#L355'>next</a><span class="Delimiter">();</span>
<span id="L8" class="LineNr">  8 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span><a href='031check_operands.cc.html#L11'>code</a> != <span class="Constant">0x80</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L9" class="LineNr">  9 </span>    <a href='003trace.cc.html#L210'>raise</a> &lt;&lt; <span class="Constant">&quot;Unimplemented interrupt <a href='031check_operands.cc.html#L11'>code</a> &quot;</span> &lt;&lt; <a href='010---vm.cc.html#L403'>HEXBYTE</a> &lt;&lt; <a href='031check_operands.cc.html#L11'>code</a> &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L10" class="LineNr"> 10 </span>    <a href='003trace.cc.html#L210'>raise</a> &lt;&lt; <span class="Constant">&quot;  Only `int 80h` supported for now.</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L11" class="LineNr"> 11 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L12" class="LineNr"> 12 </span>  <span class="Delimiter">}</span>
<span id="L13" class="LineNr"> 13 </span>  <a href='020syscalls.cc.html#L18'>process_int80</a><span class="Delimiter">();</span>
<span id="L14" class="LineNr"> 14 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L15" class="LineNr"> 15 </span><span class="Delimiter">}</span>
<span id="L16" class="LineNr"> 16 </span>
<span id="L17" class="LineNr"> 17 </span><span class="Delimiter">:(code)</span>
<span id="L18" class="LineNr"> 18 </span><span class="Normal">void</span> <a href='020syscalls.cc.html#L18'>process_int80</a><span class="Delimiter">()</span> <span class="Delimiter">{</span>
<span id="L19" class="LineNr"> 19 </span>  <span class="Normal">switch</span> <span class="Delimiter">(</span>Reg[EAX]<span class="Delimiter">.</span>u<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L20" class="LineNr"> 20 </span>  <span class="Normal">case</span> <span class="Constant">1</span>:
<span id="L21" class="LineNr"> 21 </span>    exit<span class="Delimiter">(</span><span class="Comment">/*</span><span class="Comment">exit <a href='031check_operands.cc.html#L11'>code</a></span><span class="Comment">*/</span>Reg[EBX]<span class="Delimiter">.</span>u<span class="Delimiter">);</span>
<span id="L22" class="LineNr"> 22 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L23" class="LineNr"> 23 </span>  <span class="Normal">case</span> <span class="Constant">3</span>:
<span id="L24" class="LineNr"> 24 </span>    <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">91</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;read: &quot;</span> &lt;&lt; Reg[EBX]<span class="Delimiter">.</span>u &lt;&lt; <span class="Constant">' '</span> &lt;&lt; Reg[ECX]<span class="Delimiter">.</span>u &lt;&lt; <span class="Constant">' '</span> &lt;&lt; Reg[EDX]<span class="Delimiter">.</span>u &lt;&lt; end<span class="Delimiter">();</span>
<span id="L25" class="LineNr"> 25 </span>    <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">91</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; Reg[ECX]<span class="Delimiter">.</span>u &lt;&lt; <span class="Constant">&quot; =&gt; &quot;</span> &lt;&lt; <a href='010---vm.cc.html#L246'>mem_addr_string</a><span class="Delimiter">(</span>Reg[ECX]<span class="Delimiter">.</span>u<span class="Delimiter">,</span> Reg[EDX]<span class="Delimiter">.</span>u<span class="Delimiter">)</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L26" class="LineNr"> 26 </span>    Reg[EAX]<span class="Delimiter">.</span>i = read<span class="Delimiter">(</span><span class="Comment">/*</span><span class="Comment">file descriptor</span><span class="Comment">*/</span>Reg[EBX]<span class="Delimiter">.</span>u<span class="Delimiter">,</span> <span class="Comment">/*</span><span class="Comment">memory buffer</span><span class="Comment">*/</span><a href='010---vm.cc.html#L208'>mem_addr_u8</a><span class="Delimiter">(</span>Reg[ECX]<span class="Delimiter">.</span>u<span class="Delimiter">),</span> <span class="Comment">/*</span><span class="Comment">size</span><span class="Comment">*/</span>Reg[EDX]<span class="Delimiter">.</span>u<span class="Delimiter">);</span>
<span id="L27" class="LineNr"> 27 </span>    <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">91</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;result: &quot;</span> &lt;&lt; Reg[EAX]<span class="Delimiter">.</span>i &lt;&lt; end<span class="Delimiter">();</span>
<span id="L28" class="LineNr"> 28 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>Reg[EAX]<span class="Delimiter">.</span>i == -<span class="Constant">1</span><span class="Delimiter">)</span> <a href='003trace.cc.html#L210'>raise</a> &lt;&lt; strerror<span class="Delimiter">(</span>errno<span class="Delimiter">)</span> &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L29" class="LineNr"> 29 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L30" class="LineNr"> 30 </span>  <span class="Normal">case</span> <span class="Constant">4</span>:
<span id="L31" class="LineNr"> 31 </span>    <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">91</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;write: &quot;</span> &lt;&lt; Reg[EBX]<span class="Delimiter">.</span>u &lt;&lt; <span class="Constant">' '</span> &lt;&lt; Reg[ECX]<span class="Delimiter">.</span>u &lt;&lt; <span class="Constant">' '</span> &lt;&lt; Reg[EDX]<span class="Delimiter">.</span>u &lt;&lt; end<span class="Delimiter">();</span>
<span id="L32" class="LineNr"> 32 </span>    <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">91</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; Reg[ECX]<span class="Delimiter">.</span>u &lt;&lt; <span class="Constant">&quot; =&gt; &quot;</span> &lt;&lt; <a href='010---vm.cc.html#L246'>mem_addr_string</a><span class="Delimiter">(</span>Reg[ECX]<span class="Delimiter">.</span>u<span class="Delimiter">,</span> Reg[EDX]<span class="Delimiter">.</span>u<span class="Delimiter">)</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L33" class="LineNr"> 33 </span>    Reg[EAX]<span class="Delimiter">.</span>i = write<span class="Delimiter">(</span><span class="Comment">/*</span><span class="Comment">file descriptor</span><span class="Comment">*/</span>Reg[EBX]<span class="Delimiter">.</span>u<span class="Delimiter">,</span> <span class="Comment">/*</span><span class="Comment">memory buffer</span><span class="Comment">*/</span><a href='010---vm.cc.html#L208'>mem_addr_u8</a><span class="Delimiter">(</span>Reg[ECX]<span class="Delimiter">.</span>u<span class="Delimiter">),</span> <span class="Comment">/*</span><span class="Comment">size</span><span class="Comment">*/</span>Reg[EDX]<span class="Delimiter">.</span>u<span class="Delimiter">);</span>
<span id="L34" class="LineNr"> 34 </span>    <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">91</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;result: &quot;</span> &lt;&lt; Reg[EAX]<span class="Delimiter">.</span>i &lt;&lt; end<span class="Delimiter">();</span>
<span id="L35" class="LineNr"> 35 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>Reg[EAX]<span class="Delimiter">.</span>i == -<span class="Constant">1</span><span class="Delimiter">)</span> <a href='003trace.cc.html#L210'>raise</a> &lt;&lt; strerror<span class="Delimiter">(</span>errno<span class="Delimiter">)</span> &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L36" class="LineNr"> 36 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L37" class="LineNr"> 37 </span>  <span class="Normal">case</span> <span class="Constant">5</span>: <span class="Delimiter">{</span>
<span id="L38" class="LineNr"> 38 </span>    <a href='020syscalls.cc.html#L94'>check_flags</a><span class="Delimiter">(</span><a href='010---vm.cc.html#L14'>ECX</a><span class="Delimiter">);</span>
<span id="L39" class="LineNr"> 39 </span>    <a href='020syscalls.cc.html#L106'>check_mode</a><span class="Delimiter">(</span><a href='010---vm.cc.html#L15'>EDX</a><span class="Delimiter">);</span>
<span id="L40" class="LineNr"> 40 </span>    <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">91</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;open: &quot;</span> &lt;&lt; Reg[EBX]<span class="Delimiter">.</span>u &lt;&lt; <span class="Constant">' '</span> &lt;&lt; Reg[ECX]<span class="Delimiter">.</span>u &lt;&lt; end<span class="Delimiter">();</span>
<span id="L41" class="LineNr"> 41 </span>    <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">91</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; Reg[EBX]<span class="Delimiter">.</span>u &lt;&lt; <span class="Constant">&quot; =&gt; &quot;</span> &lt;&lt; <a href='010---vm.cc.html#L243'>mem_addr_kernel_string</a><span class="Delimiter">(</span>Reg[EBX]<span class="Delimiter">.</span>u<span class="Delimiter">)</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L42" class="LineNr"> 42 </span>    Reg[EAX]<span class="Delimiter">.</span>i = open<span class="Delimiter">(</span><span class="Comment">/*</span><span class="Comment">filename</span><span class="Comment">*/</span><a href='010---vm.cc.html#L243'>mem_addr_kernel_string</a><span class="Delimiter">(</span>Reg[EBX]<span class="Delimiter">.</span>u<span class="Delimiter">),</span> <span class="Comment">/*</span><span class="Comment">flags</span><span class="Comment">*/</span>Reg[ECX]<span class="Delimiter">.</span>u<span class="Delimiter">,</span> <span class="Comment">/*</span><span class="Comment">mode</span><span class="Comment">*/</span><span class="PreProc">0</span><span class="Constant">640</span><span class="Delimiter">);</span>
<span id="L43" class="LineNr"> 43 </span>    <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">91</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;result: &quot;</span> &lt;&lt; Reg[EAX]<span class="Delimiter">.</span>i &lt;&lt; end<span class="Delimiter">();</span>
<span id="L44" class="LineNr"> 44 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>Reg[EAX]<span class="Delimiter">.</span>i == -<span class="Constant">1</span><span class="Delimiter">)</span> <a href='003trace.cc.html#L210'>raise</a> &lt;&lt; strerror<span class="Delimiter">(</span>errno<span class="Delimiter">)</span> &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L45" class="LineNr"> 45 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L46" class="LineNr"> 46 </span>  <span class="Delimiter">}</span>
<span id="L47" class="LineNr"> 47 </span>  <span class="Normal">case</span> <span class="Constant">6</span>:
<span id="L48" class="LineNr"> 48 </span>    <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">91</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;close: &quot;</span> &lt;&lt; Reg[EBX]<span class="Delimiter">.</span>u &lt;&lt; end<span class="Delimiter">();</span>
<span id="L49" class="LineNr"> 49 </span>    Reg[EAX]<span class="Delimiter">.</span>i = close<span class="Delimiter">(</span><span class="Comment">/*</span><span class="Comment">file descriptor</span><span class="Comment">*/</span>Reg[EBX]<span class="Delimiter">.</span>u<span class="Delimiter">);</span>
<span id="L50" class="LineNr"> 50 </span>    <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">91</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;result: &quot;</span> &lt;&lt; Reg[EAX]<span class="Delimiter">.</span>i &lt;&lt; end<span class="Delimiter">();</span>
<span id="L51" class="LineNr"> 51 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>Reg[EAX]<span class="Delimiter">.</span>i == -<span class="Constant">1</span><span class="Delimiter">)</span> <a href='003trace.cc.html#L210'>raise</a> &lt;&lt; strerror<span class="Delimiter">(</span>errno<span class="Delimiter">)</span> &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L52" class="LineNr"> 52 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L53" class="LineNr"> 53 </span>  <span class="Normal">case</span> <span class="Constant">8</span>:
<span id="L54" class="LineNr"> 54 </span>    <a href='020syscalls.cc.html#L106'>check_mode</a><span class="Delimiter">(</span><a href='010---vm.cc.html#L14'>ECX</a><span class="Delimiter">);</span>
<span id="L55" class="LineNr"> 55 </span>    <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">91</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;creat: &quot;</span> &lt;&lt; Reg[EBX]<span class="Delimiter">.</span>u &lt;&lt; end<span class="Delimiter">();</span>
<span id="L56" class="LineNr"> 56 </span>    <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">91</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; Reg[EBX]<span class="Delimiter">.</span>u &lt;&lt; <span class="Constant">&quot; =&gt; &quot;</span> &lt;&lt; <a href='010---vm.cc.html#L243'>mem_addr_kernel_string</a><span class="Delimiter">(</span>Reg[EBX]<span class="Delimiter">.</span>u<span class="Delimiter">)</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L57" class="LineNr"> 57 </span>    Reg[EAX]<span class="Delimiter">.</span>i = creat<span class="Delimiter">(</span><span class="Comment">/*</span><span class="Comment">filename</span><span class="Comment">*/</span><a href='010---vm.cc.html#L243'>mem_addr_kernel_string</a><span class="Delimiter">(</span>Reg[EBX]<span class="Delimiter">.</span>u<span class="Delimiter">),</span> <span class="Comment">/*</span><span class="Comment">mode</span><span class="Comment">*/</span><span class="PreProc">0</span><span class="Constant">640</span><span class="Delimiter">);</span>
<span id="L58" class="LineNr"> 58 </span>    <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">91</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;result: &quot;</span> &lt;&lt; Reg[EAX]<span class="Delimiter">.</span>i &lt;&lt; end<span class="Delimiter">();</span>
<span id="L59" class="LineNr"> 59 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>Reg[EAX]<span class="Delimiter">.</span>i == -<span class="Constant">1</span><span class="Delimiter">)</span> <a href='003trace.cc.html#L210'>raise</a> &lt;&lt; strerror<span class="Delimiter">(</span>errno<span class="Delimiter">)</span> &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L60" class="LineNr"> 60 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L61" class="LineNr"> 61 </span>  <span class="Normal">case</span> <span class="Constant">10</span>:
<span id="L62" class="LineNr"> 62 </span>    <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">91</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;unlink: &quot;</span> &lt;&lt; Reg[EBX]<span class="Delimiter">.</span>u &lt;&lt; end<span class="Delimiter">();</span>
<span id="L63" class="LineNr"> 63 </span>    <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">91</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; Reg[EBX]<span class="Delimiter">.</span>u &lt;&lt; <span class="Constant">&quot; =&gt; &quot;</span> &lt;&lt; <a href='010---vm.cc.html#L243'>mem_addr_kernel_string</a><span class="Delimiter">(</span>Reg[EBX]<span class="Delimiter">.</span>u<span class="Delimiter">)</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L64" class="LineNr"> 64 </span>    Reg[EAX]<span class="Delimiter">.</span>i = unlink<span class="Delimiter">(</span><span class="Comment">/*</span><span class="Comment">filename</span><span class="Comment">*/</span><a href='010---vm.cc.html#L243'>mem_addr_kernel_string</a><span class="Delimiter">(</span>Reg[EBX]<span class="Delimiter">.</span>u<span class="Delimiter">));</span>
<span id="L65" class="LineNr"> 65 </span>    <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">91</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;result: &quot;</span> &lt;&lt; Reg[EAX]<span class="Delimiter">.</span>i &lt;&lt; end<span class="Delimiter">();</span>
<span id="L66" class="LineNr"> 66 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>Reg[EAX]<span class="Delimiter">.</span>i == -<span class="Constant">1</span><span class="Delimiter">)</span> <a href='003trace.cc.html#L210'>raise</a> &lt;&lt; strerror<span class="Delimiter">(</span>errno<span class="Delimiter">)</span> &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L67" class="LineNr"> 67 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L68" class="LineNr"> 68 </span>  <span class="Normal">case</span> <span class="Constant">38</span>:
<span id="L69" class="LineNr"> 69 </span>    <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">91</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;rename: &quot;</span> &lt;&lt; Reg[EBX]<span class="Delimiter">.</span>u &lt;&lt; <span class="Constant">&quot; -&gt; &quot;</span> &lt;&lt; Reg[ECX]<span class="Delimiter">.</span>u &lt;&lt; end<span class="Delimiter">();</span>
<span id="L70" class="LineNr"> 70 </span>    <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">91</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; Reg[EBX]<span class="Delimiter">.</span>u &lt;&lt; <span class="Constant">&quot; =&gt; &quot;</span> &lt;&lt; <a href='010---vm.cc.html#L243'>mem_addr_kernel_string</a><span class="Delimiter">(</span>Reg[EBX]<span class="Delimiter">.</span>u<span class="Delimiter">)</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L71" class="LineNr"> 71 </span>    <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">91</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; Reg[ECX]<span class="Delimiter">.</span>u &lt;&lt; <span class="Constant">&quot; =&gt; &quot;</span> &lt;&lt; <a href='010---vm.cc.html#L243'>mem_addr_kernel_string</a><span class="Delimiter">(</span>Reg[ECX]<span class="Delimiter">.</span>u<span class="Delimiter">)</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L72" class="LineNr"> 72 </span>    Reg[EAX]<span class="Delimiter">.</span>i = rename<span class="Delimiter">(</span><span class="Comment">/*</span><span class="Comment">old filename</span><span class="Comment">*/</span><a href='010---vm.cc.html#L243'>mem_addr_kernel_string</a><span class="Delimiter">(</span>Reg[EBX]<span class="Delimiter">.</span>u<span class="Delimiter">),</span> <span class="Comment">/*</span><span class="Comment">new filename</span><span class="Comment">*/</span><a href='010---vm.cc.html#L243'>mem_addr_kernel_string</a><span class="Delimiter">(</span>Reg[ECX]<span class="Delimiter">.</span>u<span class="Delimiter">));</span>
<span id="L73" class="LineNr"> 73 </span>    <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">91</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;result: &quot;</span> &lt;&lt; Reg[EAX]<span class="Delimiter">.</span>i &lt;&lt; end<span class="Delimiter">();</span>
<span id="L74" class="LineNr"> 74 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>Reg[EAX]<span class="Delimiter">.</span>i == -<span class="Constant">1</span><span class="Delimiter">)</span> <a href='003trace.cc.html#L210'>raise</a> &lt;&lt; strerror<span class="Delimiter">(</span>errno<span class="Delimiter">)</span> &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L75" class="LineNr"> 75 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L76" class="LineNr"> 76 </span>  <span class="Normal">case</span> <span class="Constant">45</span>:  <span class="Comment">// brk: modify size of data segment</span>
<span id="L77" class="LineNr"> 77 </span>    <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">91</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;grow data segment to &quot;</span> &lt;&lt; Reg[EBX]<span class="Delimiter">.</span>u &lt;&lt; end<span class="Delimiter">();</span>
<span id="L78" class="LineNr"> 78 </span>    <a href='010---vm.cc.html#L180'>grow_data_segment</a><span class="Delimiter">(</span><span class="Comment">/*</span><span class="Comment">new end address</span><span class="Comment">*/</span>Reg[EBX]<span class="Delimiter">.</span>u<span class="Delimiter">);</span>
<span id="L79" class="LineNr"> 79 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L80" class="LineNr"> 80 </span>  <span class="Normal">case</span> <span class="Constant">90</span>:  <span class="Comment">// mmap: allocate memory outside existing segment allocations</span>
<span id="L81" class="LineNr"> 81 </span>    <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">91</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;mmap: allocate new segment&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L82" class="LineNr"> 82 </span>    <span class="Comment">// Ignore most arguments for now: address hint, protection flags, sharing flags, fd, offset.</span>
<span id="L83" class="LineNr"> 83 </span>    <span class="Comment">// We only support anonymous maps.</span>
<span id="L84" class="LineNr"> 84 </span>    Reg[EAX]<span class="Delimiter">.</span>u = <a href='020syscalls.cc.html#L117'>new_segment</a><span class="Delimiter">(</span><span class="Comment">/*</span><span class="Comment">length</span><span class="Comment">*/</span><a href='010---vm.cc.html#L200'>read_mem_u32</a><span class="Delimiter">(</span>Reg[EBX]<span class="Delimiter">.</span>u+<span class="Constant">0x4</span><span class="Delimiter">));</span>
<span id="L85" class="LineNr"> 85 </span>    <a href='003trace.cc.html#L203'>trace</a><span class="Delimiter">(</span><span class="Constant">91</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;result: &quot;</span> &lt;&lt; Reg[EAX]<span class="Delimiter">.</span>u &lt;&lt; end<span class="Delimiter">();</span>
<span id="L86" class="LineNr"> 86 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L87" class="LineNr"> 87 </span>  <span class="Normal">default</span>:
<span id="L88" class="LineNr"> 88 </span>    <a href='003trace.cc.html#L210'>raise</a> &lt;&lt; <a href='010---vm.cc.html#L404'>HEXWORD</a> &lt;&lt; <a href='010---vm.cc.html#L29'>EIP</a> &lt;&lt; <span class="Constant">&quot;: unimplemented syscall &quot;</span> &lt;&lt; Reg[EAX]<span class="Delimiter">.</span>u &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L89" class="LineNr"> 89 </span>  <span class="Delimiter">}</span>
<span id="L90" class="LineNr"> 90 </span><span class="Delimiter">}</span>
<span id="L91" class="LineNr"> 91 </span>
<span id="L92" class="LineNr"> 92 </span><span class="Comment">// SubX is oblivious to file permissions, directories, symbolic links, terminals, and much else besides.</span>
<span id="L93" class="LineNr"> 93 </span><span class="Comment">// Also ignoring any concurrency considerations for now.</span>
<span id="L94" class="LineNr"> 94 </span><span class="Normal">void</span> <a href='020syscalls.cc.html#L94'>check_flags</a><span class="Delimiter">(</span><span class="Normal">int</span> <a href='010---vm.cc.html#L23'>reg</a><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L95" class="LineNr"> 95 </span>  <span class="Normal">uint32_t</span> flags = Reg[reg]<span class="Delimiter">.</span>u<span class="Delimiter">;</span>
<span id="L96" class="LineNr"> 96 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>flags != <span class="Delimiter">((</span>flags &amp; O_RDONLY<span class="Delimiter">)</span> | <span class="Delimiter">(</span>flags &amp; O_WRONLY<span class="Delimiter">)))</span> <span class="Delimiter">{</span>
<span id="L97" class="LineNr"> 97 </span>    cerr &lt;&lt; <a href='010---vm.cc.html#L404'>HEXWORD</a> &lt;&lt; <a href='010---vm.cc.html#L29'>EIP</a> &lt;&lt; <span class="Constant">&quot;: most POSIX flags to the open() syscall are not supported. Just O_RDONLY and O_WRONLY for now. Zero concurrent access support.</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span><span class="Delimiter">;</span>
<span id="L98" class="LineNr"> 98 </span>    exit<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
<span id="L99" class="LineNr"> 99 </span>  <span class="Delimiter">}</span>
<span id="L100" class="LineNr">100 </span>  <span class="Normal">if</span> <span class="Delimiter">((</span>flags &amp; O_RDONLY<span class="Delimiter">)</span> &amp;&amp; <span class="Delimiter">(</span>flags &amp; O_WRONLY<span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span id="L101" class="LineNr">101 </span>    cerr &lt;&lt; <a href='010---vm.cc.html#L404'>HEXWORD</a> &lt;&lt; <a href='010---vm.cc.html#L29'>EIP</a> &lt;&lt; <span class="Constant">&quot;: can't open a file for both reading and writing at once. See <a href="http://man7.org/linux/man-pages/man2/open.2.html">http://man7.org/linux/man-pages/man2/open.2.html</a>.</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span><span class="Delimiter">;</span>
<span id="L102" class="LineNr">102 </span>    exit<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
<span id="L103" class="LineNr">103 </span>  <span class="Delimiter">}</span>
<span id="L104" class="LineNr">104 </span><span class="Delimiter">}</span>
<span id="L105" class="LineNr">105 </span>
<span id="L106" class="LineNr">106 </span><span class="Normal">void</span> <a href='020syscalls.cc.html#L106'>check_mode</a><span class="Delimiter">(</span><span class="Normal">int</span> <a href='010---vm.cc.html#L23'>reg</a><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L107" class="LineNr">107 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>Reg[reg]<span class="Delimiter">.</span>u != <span class="PreProc">0</span><span class="Constant">600</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L108" class="LineNr">108 </span>    cerr &lt;&lt; <a href='010---vm.cc.html#L404'>HEXWORD</a> &lt;&lt; <a href='010---vm.cc.html#L29'>EIP</a> &lt;&lt; <span class="Constant">&quot;: SubX is oblivious to file permissions; register &quot;</span> &lt;&lt; <a href='010---vm.cc.html#L23'>reg</a> &lt;&lt; <span class="Constant">&quot; must be 0.</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span><span class="Delimiter">;</span>
<span id="L109" class="LineNr">109 </span>    exit<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
<span id="L110" class="LineNr">110 </span>  <span class="Delimiter">}</span>
<span id="L111" class="LineNr">111 </span><span class="Delimiter">}</span>
<span id="L112" class="LineNr">112 </span>
<span id="L113" class="LineNr">113 </span><span class="Delimiter">:(before &quot;End Globals&quot;)</span>
<span id="L114" class="LineNr">114 </span><span class="Normal">uint32_t</span> <a href='020syscalls.cc.html#L114'>Next_segment</a> = <span class="Constant">0xb0000000</span><span class="Delimiter">;</span>  <span class="Comment">// 0xc0000000 and up is reserved for Linux kernel</span>
<span id="L115" class="LineNr">115 </span><span class="Normal">const</span> <span class="Normal">uint32_t</span> <a href='020syscalls.cc.html#L115'>SPACE_FOR_SEGMENT</a> = <span class="Constant">0x01000000</span><span class="Delimiter">;</span>
<span id="L116" class="LineNr">116 </span><span class="Delimiter">:(code)</span>
<span id="L117" class="LineNr">117 </span><span class="Normal">uint32_t</span> <a href='020syscalls.cc.html#L117'>new_segment</a><span class="Delimiter">(</span><span class="Normal">uint32_t</span> length<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L118" class="LineNr">118 </span>  <span class="Normal">uint32_t</span> result = <a href='020syscalls.cc.html#L114'>Next_segment</a><span class="Delimiter">;</span>
<span id="L119" class="LineNr">119 </span>  <a href='010---vm.cc.html#L171'>Mem</a><span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>vma<span class="Delimiter">(</span><a href='020syscalls.cc.html#L114'>Next_segment</a><span class="Delimiter">,</span> Next_segment+length<span class="Delimiter">));</span>
<span id="L120" class="LineNr">120 </span>  <a href='020syscalls.cc.html#L114'>Next_segment</a> -= <a href='020syscalls.cc.html#L115'>SPACE_FOR_SEGMENT</a><span class="Delimiter">;</span>
<span id="L121" class="LineNr">121 </span>  <span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span id="L122" class="LineNr">122 </span><span class="Delimiter">}</span>
</pre>
</body>
</html>
<!-- vim: set foldmethod=manual : -->