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
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
|
<!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/055trace.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; }
a { color:#eeeeee; text-decoration: none; }
a:hover { text-decoration: underline; }
* { font-size: 12pt; font-size: 1em; }
.LineNr { color: #444444; }
.Delimiter { color: #800080; }
.Comment { color: #9090ff; }
.Comment a { color:#0000ee; text-decoration:underline; }
-->
</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="Comment"># helpers for emitting traces to a trace stream, and for tests to check the trace stream</span>
<span id="L2" class="LineNr"> 2 </span><span class="Comment">#</span>
<span id="L3" class="LineNr"> 3 </span><span class="Comment"># A trace stream looks like this:</span>
<span id="L4" class="LineNr"> 4 </span><span class="Comment"># read : int # index that we've read until</span>
<span id="L5" class="LineNr"> 5 </span><span class="Comment"># write : int # index at which writes go</span>
<span id="L6" class="LineNr"> 6 </span><span class="Comment"># data : (array byte) # prefixed by length as usual</span>
<span id="L7" class="LineNr"> 7 </span><span class="Comment"># In a real trace the data will be in a special segment set aside for the purpose.</span>
<span id="L8" class="LineNr"> 8 </span><span class="Comment">#</span>
<span id="L9" class="LineNr"> 9 </span><span class="Comment"># primitives for operating on traces:</span>
<span id="L10" class="LineNr"> 10 </span><span class="Comment"># - initialize-trace-stream (update global variable)</span>
<span id="L11" class="LineNr"> 11 </span><span class="Comment"># - trace: stream, string</span>
<span id="L12" class="LineNr"> 12 </span><span class="Comment"># - die: stream (exit(1) if using real trace)</span>
<span id="L13" class="LineNr"> 13 </span><span class="Comment"># - check-trace-contains: stream, string/line, string/message (scans only from stream's read pointer, prints message to stderr on failure, updates stream's read pointer)</span>
<span id="L14" class="LineNr"> 14 </span><span class="Comment"># - rewind-reads: stream (resets read pointer)</span>
<span id="L15" class="LineNr"> 15 </span><span class="Comment"># - scan-to-next-line: stream (advance read pointer past next newline)</span>
<span id="L16" class="LineNr"> 16 </span><span class="Comment">#</span>
<span id="L17" class="LineNr"> 17 </span><span class="Comment"># Traces are very fundamental, so many of the helpers we create here won't be</span>
<span id="L18" class="LineNr"> 18 </span><span class="Comment"># used elsewhere; we'll switch to more bounds-checked variants. But here we get</span>
<span id="L19" class="LineNr"> 19 </span><span class="Comment"># bounds-checking for free; we allocate a completely disjoint segment for trace</span>
<span id="L20" class="LineNr"> 20 </span><span class="Comment"># data, and overflowing it will generate a page fault.</span>
<span id="L21" class="LineNr"> 21 </span>
<span id="L22" class="LineNr"> 22 </span>== data
<span id="L23" class="LineNr"> 23 </span>
<span id="L24" class="LineNr"> 24 </span><span class="Comment"># We'll save the address of the trace segment here.</span>
<span id="L25" class="LineNr"> 25 </span>Trace-stream:
<span id="L26" class="LineNr"> 26 </span> 00 00 00 00
<span id="L27" class="LineNr"> 27 </span>
<span id="L28" class="LineNr"> 28 </span><span class="Comment"># Fake trace-stream for tests.</span>
<span id="L29" class="LineNr"> 29 </span><span class="Comment"># Also illustrates the layout of the real trace-stream (segment).</span>
<span id="L30" class="LineNr"> 30 </span>Test-trace-stream:
<span id="L31" class="LineNr"> 31 </span> <span class="Comment"># current write index</span>
<span id="L32" class="LineNr"> 32 </span> 00 00 00 00
<span id="L33" class="LineNr"> 33 </span> <span class="Comment"># current read index</span>
<span id="L34" class="LineNr"> 34 </span> 00 00 00 00
<span id="L35" class="LineNr"> 35 </span> <span class="Comment"># length (= 8)</span>
<span id="L36" class="LineNr"> 36 </span> 08 00 00 00
<span id="L37" class="LineNr"> 37 </span> <span class="Comment"># data</span>
<span id="L38" class="LineNr"> 38 </span> 00 00 00 00 00 00 00 00 <span class="Comment"># 8 bytes</span>
<span id="L39" class="LineNr"> 39 </span>
<span id="L40" class="LineNr"> 40 </span>== code
<span id="L41" class="LineNr"> 41 </span>
<span id="L42" class="LineNr"> 42 </span><span class="Comment"># instruction effective address operand displacement immediate</span>
<span id="L43" class="LineNr"> 43 </span><span class="Comment"># op subop mod rm32 base index scale r32</span>
<span id="L44" class="LineNr"> 44 </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="L45" class="LineNr"> 45 </span>
<span id="L46" class="LineNr"> 46 </span><span class="Comment"># main: (manual test if this is the last file loaded)</span>
<span id="L47" class="LineNr"> 47 </span> e8/call run-tests/disp32 <span class="Comment"># 'run-tests' is a function created automatically by SubX. It calls all functions that start with 'test-'.</span>
<span id="L48" class="LineNr"> 48 </span> <span class="Comment"># syscall(exit, Num-test-failures)</span>
<span id="L49" class="LineNr"> 49 </span> 8b/copy 0/mod/indirect 5/rm32/.disp32 <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 1/r32/EBX Num-test-failures/disp32 <span class="Comment"># copy *Num-test-failures to EBX</span>
<span id="L50" class="LineNr"> 50 </span> b8/copy-to-EAX 1/imm32
<span id="L51" class="LineNr"> 51 </span> cd/syscall 0x80/imm8
<span id="L52" class="LineNr"> 52 </span>
<span id="L53" class="LineNr"> 53 </span><span class="Comment"># Allocate a new segment for the trace stream, initialize its length, and save its address to Trace-stream.</span>
<span id="L54" class="LineNr"> 54 </span><span class="Comment"># The Trace-stream segment will consist of variable-length lines separated by newlines (0x0a)</span>
<span id="L55" class="LineNr"> 55 </span>initialize-trace-stream:
<span id="L56" class="LineNr"> 56 </span> <span class="Comment"># EAX = new-segment(0x1000)</span>
<span id="L57" class="LineNr"> 57 </span> <span class="Comment"># push args</span>
<span id="L58" class="LineNr"> 58 </span> 68/push 0x1000/imm32/N
<span id="L59" class="LineNr"> 59 </span> <span class="Comment"># call</span>
<span id="L60" class="LineNr"> 60 </span> e8/call new-segment/disp32
<span id="L61" class="LineNr"> 61 </span> <span class="Comment"># discard args</span>
<span id="L62" class="LineNr"> 62 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <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 ESP</span>
<span id="L63" class="LineNr"> 63 </span> <span class="Comment"># copy EAX to *Trace-stream</span>
<span id="L64" class="LineNr"> 64 </span> 89/copy 0/mod/indirect 5/rm32/.disp32 <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0/r32/EAX Trace-stream/disp32 <span class="Comment"># copy EAX to *Trace-stream</span>
<span id="L65" class="LineNr"> 65 </span> <span class="Comment"># Trace-stream.length = 0x1000/N - 12</span>
<span id="L66" class="LineNr"> 66 </span> c7 0/copy 1/mod/*+disp8 0/rm32/EAX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 8/disp8 0xff4/imm32 <span class="Comment"># copy 0xff4 to *(EAX+8)</span>
<span id="L67" class="LineNr"> 67 </span> c3/return
<span id="L68" class="LineNr"> 68 </span>
<span id="L69" class="LineNr"> 69 </span><span class="Comment"># Append to the given trace stream.</span>
<span id="L70" class="LineNr"> 70 </span>trace: <span class="Comment"># t : (address trace-stream), line : string</span>
<span id="L71" class="LineNr"> 71 </span> <span class="Comment"># prolog</span>
<span id="L72" class="LineNr"> 72 </span> 55/push-EBP
<span id="L73" class="LineNr"> 73 </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="L74" class="LineNr"> 74 </span> <span class="Comment"># save registers</span>
<span id="L75" class="LineNr"> 75 </span> 50/push-EAX
<span id="L76" class="LineNr"> 76 </span> 51/push-ECX
<span id="L77" class="LineNr"> 77 </span> 52/push-EDX
<span id="L78" class="LineNr"> 78 </span> 53/push-EBX
<span id="L79" class="LineNr"> 79 </span> 56/push-ESI
<span id="L80" class="LineNr"> 80 </span> 57/push-EDI
<span id="L81" class="LineNr"> 81 </span> <span class="Comment"># EDI = t</span>
<span id="L82" class="LineNr"> 82 </span> 8b/copy 1/mod/*+disp8 4/rm32/sib 5/base/EBP 4/index/none 7/r32/EDI 8/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy *(EBP+8) to EDI</span>
<span id="L83" class="LineNr"> 83 </span> <span class="Comment"># ESI = line</span>
<span id="L84" class="LineNr"> 84 </span> 8b/copy 1/mod/*+disp8 4/rm32/sib 5/base/EBP 4/index/none 6/r32/ESI 0xc/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy *(EBP+12) to ESI</span>
<span id="L85" class="LineNr"> 85 </span> <span class="Comment"># ECX = t.write</span>
<span id="L86" class="LineNr"> 86 </span> 8b/copy 0/mod/indirect 7/rm32/EDI <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 1/r32/ECX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># copy *EDI to ECX</span>
<span id="L87" class="LineNr"> 87 </span> <span class="Comment"># EDX = t.length</span>
<span id="L88" class="LineNr"> 88 </span> 8b/copy 1/mod/*+disp8 7/rm32/EDI <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 2/r32/EDX 8/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy *(EDI+8) to EDX</span>
<span id="L89" class="LineNr"> 89 </span> <span class="Comment"># EAX = _append(&t.data[t.write], &t.data[t.length], line)</span>
<span id="L90" class="LineNr"> 90 </span> <span class="Comment"># push line</span>
<span id="L91" class="LineNr"> 91 </span> 56/push-ESI
<span id="L92" class="LineNr"> 92 </span> <span class="Comment"># push &t.data[t.length]</span>
<span id="L93" class="LineNr"> 93 </span> 8d/copy-address 1/mod/*+disp8 4/rm32/sib 7/base/EDI 2/index/EDX <span class="Delimiter"> . </span> 3/r32/EBX 0xc/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy EDI+EDX+12 to EBX</span>
<span id="L94" class="LineNr"> 94 </span> 53/push-EBX
<span id="L95" class="LineNr"> 95 </span> <span class="Comment"># push &t.data[t.write]</span>
<span id="L96" class="LineNr"> 96 </span> 8d/copy-address 1/mod/*+disp8 4/rm32/sib 7/base/EDI 1/index/ECX <span class="Delimiter"> . </span> 3/r32/EBX 0xc/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy EDI+ECX+12 to EBX</span>
<span id="L97" class="LineNr"> 97 </span> 53/push-EBX
<span id="L98" class="LineNr"> 98 </span> <span class="Comment"># call</span>
<span id="L99" class="LineNr"> 99 </span> e8/call _append/disp32
<span id="L100" class="LineNr">100 </span> <span class="Comment"># discard args</span>
<span id="L101" class="LineNr">101 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0xc/imm32 <span class="Comment"># add to ESP</span>
<span id="L102" class="LineNr">102 </span> <span class="Comment"># if EAX == 0 return</span>
<span id="L103" class="LineNr">103 </span> 81 7/subop/compare 3/mod/direct 0/rm32/EAX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0/imm32 <span class="Comment"># compare EDX</span>
<span id="L104" class="LineNr">104 </span> 74/jump-if-equal $trace:end/disp8
<span id="L105" class="LineNr">105 </span> <span class="Comment"># t.write += EAX</span>
<span id="L106" class="LineNr">106 </span> 01/add 0/mod/indirect 7/rm32/EDI <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0/r32/EAX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># add EAX to *EDI</span>
<span id="L107" class="LineNr">107 </span> <span class="Comment"># refresh ECX = t.write</span>
<span id="L108" class="LineNr">108 </span> 8b/copy 0/mod/indirect 7/rm32/EDI <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 1/r32/ECX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># copy *EDI to ECX</span>
<span id="L109" class="LineNr">109 </span> <span class="Comment"># EAX = _append(&t.data[t.write], &t.data[t.length], line)</span>
<span id="L110" class="LineNr">110 </span> <span class="Comment"># push line</span>
<span id="L111" class="LineNr">111 </span> 68/push Newline/imm32
<span id="L112" class="LineNr">112 </span> <span class="Comment"># push &t.data[t.length]</span>
<span id="L113" class="LineNr">113 </span> 8d/copy-address 1/mod/*+disp8 4/rm32/sib 7/base/EDI 2/index/EDX <span class="Delimiter"> . </span> 3/r32/EBX 0xc/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy EDI+EDX+12 to EBX</span>
<span id="L114" class="LineNr">114 </span> 53/push-EBX
<span id="L115" class="LineNr">115 </span> <span class="Comment"># push &t.data[t.write]</span>
<span id="L116" class="LineNr">116 </span> 8d/copy-address 1/mod/*+disp8 4/rm32/sib 7/base/EDI 1/index/ECX <span class="Delimiter"> . </span> 3/r32/EBX 0xc/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy EDI+ECX+12 to EBX</span>
<span id="L117" class="LineNr">117 </span> 53/push-EBX
<span id="L118" class="LineNr">118 </span> <span class="Comment"># call</span>
<span id="L119" class="LineNr">119 </span> e8/call _append/disp32
<span id="L120" class="LineNr">120 </span> <span class="Comment"># discard args</span>
<span id="L121" class="LineNr">121 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0xc/imm32 <span class="Comment"># add to ESP</span>
<span id="L122" class="LineNr">122 </span> <span class="Comment"># t.write += EAX</span>
<span id="L123" class="LineNr">123 </span> 01/add 0/mod/indirect 7/rm32/EDI <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0/r32/EAX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># add EAX to *EDI</span>
<span id="L124" class="LineNr">124 </span>$trace:end:
<span id="L125" class="LineNr">125 </span> <span class="Comment"># restore registers</span>
<span id="L126" class="LineNr">126 </span> 5f/pop-to-EDI
<span id="L127" class="LineNr">127 </span> 5e/pop-to-ESI
<span id="L128" class="LineNr">128 </span> 5b/pop-to-EBX
<span id="L129" class="LineNr">129 </span> 5a/pop-to-EDX
<span id="L130" class="LineNr">130 </span> 59/pop-to-ECX
<span id="L131" class="LineNr">131 </span> 58/pop-to-EAX
<span id="L132" class="LineNr">132 </span> <span class="Comment"># epilog</span>
<span id="L133" class="LineNr">133 </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="L134" class="LineNr">134 </span> 5d/pop-to-EBP
<span id="L135" class="LineNr">135 </span> c3/return
<span id="L136" class="LineNr">136 </span>
<span id="L137" class="LineNr">137 </span>_append: <span class="Comment"># out : address, outend : address, s : (array byte) -> num_bytes_appended/EAX</span>
<span id="L138" class="LineNr">138 </span> <span class="Comment"># prolog</span>
<span id="L139" class="LineNr">139 </span> 55/push-EBP
<span id="L140" class="LineNr">140 </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="L141" class="LineNr">141 </span> <span class="Comment"># save registers</span>
<span id="L142" class="LineNr">142 </span> 51/push-ECX
<span id="L143" class="LineNr">143 </span> 52/push-EDX
<span id="L144" class="LineNr">144 </span> 53/push-EBX
<span id="L145" class="LineNr">145 </span> 56/push-ESI
<span id="L146" class="LineNr">146 </span> 57/push-EDI
<span id="L147" class="LineNr">147 </span> <span class="Comment"># EAX/num_bytes_appended = 0</span>
<span id="L148" class="LineNr">148 </span> b8/copy-to-EAX 0/imm32
<span id="L149" class="LineNr">149 </span> <span class="Comment"># EDI = out</span>
<span id="L150" class="LineNr">150 </span> 8b/copy 1/mod/*+disp8 4/rm32/sib 5/base/EBP 4/index/none 7/r32/EDI 0x8/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy *(EBP+8) to EDI</span>
<span id="L151" class="LineNr">151 </span> <span class="Comment"># EDX = outend</span>
<span id="L152" class="LineNr">152 </span> 8b/copy 1/mod/*+disp8 4/rm32/sib 5/base/EBP 4/index/none 2/r32/EDX 0xc/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy *(EBP+12) to EDX</span>
<span id="L153" class="LineNr">153 </span> <span class="Comment"># ESI = s</span>
<span id="L154" class="LineNr">154 </span> 8b/copy 1/mod/*+disp8 4/rm32/sib 5/base/EBP 4/index/none 6/r32/ESI 0x10/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy *(EBP+16) to ESI</span>
<span id="L155" class="LineNr">155 </span> <span class="Comment"># ECX = line.length</span>
<span id="L156" class="LineNr">156 </span> 8b/copy 0/mod/indirect 6/rm32/ESI <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 1/r32/ECX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># copy *ESI to ECX</span>
<span id="L157" class="LineNr">157 </span> <span class="Comment"># ECX/srcend = &line.data[line.length]</span>
<span id="L158" class="LineNr">158 </span> 8d/copy-address 1/mod/*+disp8 4/rm32/sib 6/base/ESI 1/index/ECX <span class="Delimiter"> . </span> 1/r32/ECX 4/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy ESI+ECX+4 to ECX</span>
<span id="L159" class="LineNr">159 </span> <span class="Comment"># ESI/src = &line.data[0]</span>
<span id="L160" class="LineNr">160 </span> 81 0/subop/add 3/mod/direct 6/rm32/ESI <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 ESI</span>
<span id="L161" class="LineNr">161 </span>$_append:loop:
<span id="L162" class="LineNr">162 </span> <span class="Comment"># if ESI/src >= ECX/srcend break</span>
<span id="L163" class="LineNr">163 </span> 39/compare 3/mod/direct 6/rm32/ESI <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 1/r32/ECX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># compare ESI with ECX</span>
<span id="L164" class="LineNr">164 </span> 7d/jump-if-greater-or-equal $_append:end/disp8
<span id="L165" class="LineNr">165 </span> <span class="Comment"># if EDI/out >= EDX/outend break (for now silently ignore filled up trace buffer)</span>
<span id="L166" class="LineNr">166 </span> 39/compare 3/mod/direct 7/rm32/EDI <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"># compare EDI with EDX</span>
<span id="L167" class="LineNr">167 </span> 7d/jump-if-greater-or-equal $_append:end/disp8
<span id="L168" class="LineNr">168 </span> <span class="Comment"># copy one byte from ESI/src to EDI/out</span>
<span id="L169" class="LineNr">169 </span> 8a/copy-byte 0/mod/indirect 6/rm32/ESI <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 3/r32/BL <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># copy byte at *ESI to BL</span>
<span id="L170" class="LineNr">170 </span> 88/copy-byte 0/mod/indirect 7/rm32/EDI <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 3/r32/BL <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># copy byte at BL to *EDI</span>
<span id="L171" class="LineNr">171 </span> <span class="Comment"># updates</span>
<span id="L172" class="LineNr">172 </span> 40/increment-EAX
<span id="L173" class="LineNr">173 </span> 46/increment-ESI
<span id="L174" class="LineNr">174 </span> 47/increment-EDI
<span id="L175" class="LineNr">175 </span> eb/jump $_append:loop/disp8
<span id="L176" class="LineNr">176 </span>$_append:end:
<span id="L177" class="LineNr">177 </span> <span class="Comment"># restore registers</span>
<span id="L178" class="LineNr">178 </span> 5f/pop-to-EDI
<span id="L179" class="LineNr">179 </span> 5e/pop-to-ESI
<span id="L180" class="LineNr">180 </span> 5b/pop-to-EBX
<span id="L181" class="LineNr">181 </span> 5a/pop-to-EDX
<span id="L182" class="LineNr">182 </span> 59/pop-to-ECX
<span id="L183" class="LineNr">183 </span> <span class="Comment"># epilog</span>
<span id="L184" class="LineNr">184 </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="L185" class="LineNr">185 </span> 5d/pop-to-EBP
<span id="L186" class="LineNr">186 </span> c3/return
<span id="L187" class="LineNr">187 </span>
<span id="L188" class="LineNr">188 </span>clear-trace-stream: <span class="Comment"># t : (address trace-stream)</span>
<span id="L189" class="LineNr">189 </span> <span class="Comment"># prolog</span>
<span id="L190" class="LineNr">190 </span> 55/push-EBP
<span id="L191" class="LineNr">191 </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="L192" class="LineNr">192 </span> <span class="Comment"># save registers</span>
<span id="L193" class="LineNr">193 </span> 50/push-EAX
<span id="L194" class="LineNr">194 </span> 51/push-ECX
<span id="L195" class="LineNr">195 </span> <span class="Comment"># EAX = t</span>
<span id="L196" class="LineNr">196 </span> 8b/copy 1/mod/*+disp8 4/rm32/sib 5/base/EBP 4/index/none 0/r32/EAX 8/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy *(EBP+8) to EAX</span>
<span id="L197" class="LineNr">197 </span> <span class="Comment"># ECX = t.length</span>
<span id="L198" class="LineNr">198 </span> 8b/copy 1/mod/*+disp8 0/rm32/EAX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 1/r32/ECX 8/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy *(EAX+8) to ECX</span>
<span id="L199" class="LineNr">199 </span> <span class="Comment"># ECX = &t.data[t.length]</span>
<span id="L200" class="LineNr">200 </span> 8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/EAX 1/index/ECX <span class="Delimiter"> . </span> 1/r32/ECX 0xc/disp8 <span class="Delimiter"> . </span> <span class="Comment"># copy EAX+ECX+12 to ECX</span>
<span id="L201" class="LineNr">201 </span> <span class="Comment"># t.write = 0</span>
<span id="L202" class="LineNr">202 </span> c7/copy 0/mod/direct 0/rm32/EAX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0/imm32 <span class="Comment"># copy to *EAX</span>
<span id="L203" class="LineNr">203 </span> <span class="Comment"># t.read = 0</span>
<span id="L204" class="LineNr">204 </span> c7/copy 1/mod/*+disp8 0/rm32/EAX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 4/disp8 0/imm32 <span class="Comment"># copy to *(EAX+4)</span>
<span id="L205" class="LineNr">205 </span> <span class="Comment"># EAX = t.data</span>
<span id="L206" class="LineNr">206 </span> 81 0/subop/add 3/mod/direct 0/rm32/EAX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0xc/imm32 <span class="Comment"># add to EAX</span>
<span id="L207" class="LineNr">207 </span> <span class="Comment"># while (true)</span>
<span id="L208" class="LineNr">208 </span>$clear-trace-stream:loop:
<span id="L209" class="LineNr">209 </span> <span class="Comment"># if EAX >= ECX break</span>
<span id="L210" class="LineNr">210 </span> 39/compare 3/mod/direct 0/rm32/EAX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 1/r32/ECX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Comment"># compare EAX with ECX</span>
<span id="L211" class="LineNr">211 </span> 7d/jump-if-greater-or-equal $clear-trace-stream:end/disp8
<span id="L212" class="LineNr">212 </span> <span class="Comment"># *EAX = 0</span>
<span id="L213" class="LineNr">213 </span> c7/copy 0/mod/direct 0/rm32/EAX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0/imm32 <span class="Comment"># copy to *EAX</span>
<span id="L214" class="LineNr">214 </span> <span class="Comment"># EAX += 4</span>
<span id="L215" class="LineNr">215 </span> 81 0/subop/add 3/mod/direct 0/rm32/EAX <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 EAX</span>
<span id="L216" class="LineNr">216 </span> eb/jump $clear-trace-stream:loop/disp8
<span id="L217" class="LineNr">217 </span>$clear-trace-stream:end:
<span id="L218" class="LineNr">218 </span> <span class="Comment"># restore registers</span>
<span id="L219" class="LineNr">219 </span> 59/pop-to-ECX
<span id="L220" class="LineNr">220 </span> 58/pop-to-EAX
<span id="L221" class="LineNr">221 </span> <span class="Comment"># epilog</span>
<span id="L222" class="LineNr">222 </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="L223" class="LineNr">223 </span> 5d/pop-to-EBP
<span id="L224" class="LineNr">224 </span> c3/return
<span id="L225" class="LineNr">225 </span>
<span id="L226" class="LineNr">226 </span>test-trace-single:
<span id="L227" class="LineNr">227 </span> <span class="Comment"># clear-trace-stream(Test-trace-stream)</span>
<span id="L228" class="LineNr">228 </span> <span class="Comment"># push args</span>
<span id="L229" class="LineNr">229 </span> 68/push Test-trace-stream/imm32
<span id="L230" class="LineNr">230 </span> <span class="Comment"># call</span>
<span id="L231" class="LineNr">231 </span> e8/call clear-trace-stream/disp32
<span id="L232" class="LineNr">232 </span> <span class="Comment"># discard args</span>
<span id="L233" class="LineNr">233 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <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 ESP</span>
<span id="L234" class="LineNr">234 </span> <span class="Comment"># trace(Test-trace-stream, "Ab")</span>
<span id="L235" class="LineNr">235 </span> <span class="Comment"># push args</span>
<span id="L236" class="LineNr">236 </span> 68/push "Ab"/imm32
<span id="L237" class="LineNr">237 </span> 68/push Test-trace-stream/imm32
<span id="L238" class="LineNr">238 </span> <span class="Comment"># call</span>
<span id="L239" class="LineNr">239 </span> e8/call trace/disp32
<span id="L240" class="LineNr">240 </span> <span class="Comment"># discard args</span>
<span id="L241" class="LineNr">241 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 8/imm32 <span class="Comment"># add to ESP</span>
<span id="L242" class="LineNr">242 </span> <span class="Comment"># check-ints-equal(*Test-trace-stream.data, 41/A 62/b 0a/newline 00, msg)</span>
<span id="L243" class="LineNr">243 </span> <span class="Comment"># push args</span>
<span id="L244" class="LineNr">244 </span> 68/push "F - test-trace-single"/imm32
<span id="L245" class="LineNr">245 </span> 68/push 0x0a6241/imm32/Ab-newline
<span id="L246" class="LineNr">246 </span> <span class="Comment"># push *Test-trace-stream.data</span>
<span id="L247" class="LineNr">247 </span> b8/copy-to-EAX Test-trace-stream/imm32
<span id="L248" class="LineNr">248 </span> ff 6/subop/push 1/mod/*+disp8 0/rm32/EAX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0xc/disp8 <span class="Delimiter"> . </span> <span class="Comment"># push *(EAX+12)</span>
<span id="L249" class="LineNr">249 </span> <span class="Comment"># call</span>
<span id="L250" class="LineNr">250 </span> e8/call check-ints-equal/disp32
<span id="L251" class="LineNr">251 </span> <span class="Comment"># discard args</span>
<span id="L252" class="LineNr">252 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0xc/imm32 <span class="Comment"># add to ESP</span>
<span id="L253" class="LineNr">253 </span> <span class="Comment"># end</span>
<span id="L254" class="LineNr">254 </span> c3/return
<span id="L255" class="LineNr">255 </span>
<span id="L256" class="LineNr">256 </span>test-trace-appends:
<span id="L257" class="LineNr">257 </span> <span class="Comment"># clear-trace-stream(Test-trace-stream)</span>
<span id="L258" class="LineNr">258 </span> <span class="Comment"># push args</span>
<span id="L259" class="LineNr">259 </span> 68/push Test-trace-stream/imm32
<span id="L260" class="LineNr">260 </span> <span class="Comment"># call</span>
<span id="L261" class="LineNr">261 </span> e8/call clear-trace-stream/disp32
<span id="L262" class="LineNr">262 </span> <span class="Comment"># discard args</span>
<span id="L263" class="LineNr">263 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <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 ESP</span>
<span id="L264" class="LineNr">264 </span> <span class="Comment"># trace(Test-trace-stream, "C")</span>
<span id="L265" class="LineNr">265 </span> <span class="Comment"># push args</span>
<span id="L266" class="LineNr">266 </span> 68/push "C"/imm32
<span id="L267" class="LineNr">267 </span> 68/push Test-trace-stream/imm32
<span id="L268" class="LineNr">268 </span> <span class="Comment"># call</span>
<span id="L269" class="LineNr">269 </span> e8/call trace/disp32
<span id="L270" class="LineNr">270 </span> <span class="Comment"># discard args</span>
<span id="L271" class="LineNr">271 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 8/imm32 <span class="Comment"># add to ESP</span>
<span id="L272" class="LineNr">272 </span> <span class="Comment"># trace(Test-trace-stream, "D")</span>
<span id="L273" class="LineNr">273 </span> <span class="Comment"># push args</span>
<span id="L274" class="LineNr">274 </span> 68/push "D"/imm32
<span id="L275" class="LineNr">275 </span> 68/push Test-trace-stream/imm32
<span id="L276" class="LineNr">276 </span> <span class="Comment"># call</span>
<span id="L277" class="LineNr">277 </span> e8/call trace/disp32
<span id="L278" class="LineNr">278 </span> <span class="Comment"># discard args</span>
<span id="L279" class="LineNr">279 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 8/imm32 <span class="Comment"># add to ESP</span>
<span id="L280" class="LineNr">280 </span> <span class="Comment"># check-ints-equal(*Test-trace-stream.data, 43/C 0a/newline 44/D 0a/newline, msg)</span>
<span id="L281" class="LineNr">281 </span> <span class="Comment"># push args</span>
<span id="L282" class="LineNr">282 </span> 68/push "F - test-trace-appends"/imm32
<span id="L283" class="LineNr">283 </span> 68/push 0x0a440a43/imm32/C-newline-D-newline
<span id="L284" class="LineNr">284 </span> <span class="Comment"># push *Test-trace-stream.data</span>
<span id="L285" class="LineNr">285 </span> b8/copy-to-EAX Test-trace-stream/imm32
<span id="L286" class="LineNr">286 </span> ff 6/subop/push 1/mod/*+disp8 0/rm32/EAX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0xc/disp8 <span class="Delimiter"> . </span> <span class="Comment"># push *(EAX+12)</span>
<span id="L287" class="LineNr">287 </span> <span class="Comment"># call</span>
<span id="L288" class="LineNr">288 </span> e8/call check-ints-equal/disp32
<span id="L289" class="LineNr">289 </span> <span class="Comment"># discard args</span>
<span id="L290" class="LineNr">290 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0xc/imm32 <span class="Comment"># add to ESP</span>
<span id="L291" class="LineNr">291 </span> <span class="Comment"># end</span>
<span id="L292" class="LineNr">292 </span> c3/return
<span id="L293" class="LineNr">293 </span>
<span id="L294" class="LineNr">294 </span>test-trace-empty-line:
<span id="L295" class="LineNr">295 </span> <span class="Comment"># clear-trace-stream(Test-trace-stream)</span>
<span id="L296" class="LineNr">296 </span> <span class="Comment"># push args</span>
<span id="L297" class="LineNr">297 </span> 68/push Test-trace-stream/imm32
<span id="L298" class="LineNr">298 </span> <span class="Comment"># call</span>
<span id="L299" class="LineNr">299 </span> e8/call clear-trace-stream/disp32
<span id="L300" class="LineNr">300 </span> <span class="Comment"># discard args</span>
<span id="L301" class="LineNr">301 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <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 ESP</span>
<span id="L302" class="LineNr">302 </span> <span class="Comment"># trace(Test-trace-stream, "")</span>
<span id="L303" class="LineNr">303 </span> <span class="Comment"># push args</span>
<span id="L304" class="LineNr">304 </span> 68/push ""/imm32
<span id="L305" class="LineNr">305 </span> 68/push Test-trace-stream/imm32
<span id="L306" class="LineNr">306 </span> <span class="Comment"># call</span>
<span id="L307" class="LineNr">307 </span> e8/call trace/disp32
<span id="L308" class="LineNr">308 </span> <span class="Comment"># discard args</span>
<span id="L309" class="LineNr">309 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 8/imm32 <span class="Comment"># add to ESP</span>
<span id="L310" class="LineNr">310 </span> <span class="Comment"># check-ints-equal(*Test-trace-stream.data, 0, msg)</span>
<span id="L311" class="LineNr">311 </span> <span class="Comment"># push args</span>
<span id="L312" class="LineNr">312 </span> 68/push "F - test-trace-empty-line"/imm32
<span id="L313" class="LineNr">313 </span> 68/push 0/imm32
<span id="L314" class="LineNr">314 </span> <span class="Comment"># push *Test-trace-stream.data</span>
<span id="L315" class="LineNr">315 </span> b8/copy-to-EAX Test-trace-stream/imm32
<span id="L316" class="LineNr">316 </span> ff 6/subop/push 1/mod/*+disp8 0/rm32/EAX <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0xc/disp8 <span class="Delimiter"> . </span> <span class="Comment"># push *(EAX+12)</span>
<span id="L317" class="LineNr">317 </span> <span class="Comment"># call</span>
<span id="L318" class="LineNr">318 </span> e8/call check-ints-equal/disp32
<span id="L319" class="LineNr">319 </span> <span class="Comment"># discard args</span>
<span id="L320" class="LineNr">320 </span> 81 0/subop/add 3/mod/direct 4/rm32/ESP <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> <span class="Delimiter"> . </span> 0xc/imm32 <span class="Comment"># add to ESP</span>
<span id="L321" class="LineNr">321 </span> <span class="Comment"># end</span>
<span id="L322" class="LineNr">322 </span> c3/return
<span id="L323" class="LineNr">323 </span>
<span id="L324" class="LineNr">324 </span><span class="Comment"># vim:nowrap:textwidth=0</span>
</pre>
</body>
</html>
<!-- vim: set foldmethod=manual : -->
|