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
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
|
<!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/010---vm.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-light">
<style type="text/css">
<!--
pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #c6c6c6; }
body { font-size:12pt; font-family: monospace; color: #000000; background-color: #c6c6c6; }
a { color:inherit; }
* { font-size:12pt; font-size: 1em; }
.cSpecial { color: #008000; }
.LineNr { }
.Constant { color: #008787; }
.CommentedCode { color: #8a8a8a; }
.Delimiter { color: #c000c0; }
.Special { color: #d70000; }
.Identifier { color: #af5f00; }
.Normal { color: #000000; background-color: #c6c6c6; padding-bottom: 1px; }
.Comment { color: #005faf; }
.SalientComment { color: #0000af; }
-->
</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/010---vm.cc'>https://github.com/akkartik/mu/blob/master/subx/010---vm.cc</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="Comment">//: Core data structures for simulating the SubX VM (subset of an x86 processor)</span>
<span id="L2" class="LineNr"> 2 </span><span class="Comment">//:</span>
<span id="L3" class="LineNr"> 3 </span><span class="Comment">//: At the lowest level ("level 1") of abstraction, SubX executes x86</span>
<span id="L4" class="LineNr"> 4 </span><span class="Comment">//: instructions provided in the form of an array of bytes, loaded into memory</span>
<span id="L5" class="LineNr"> 5 </span><span class="Comment">//: starting at a specific address.</span>
<span id="L6" class="LineNr"> 6 </span>
<span id="L7" class="LineNr"> 7 </span><span class="SalientComment">//:: registers</span>
<span id="L8" class="LineNr"> 8 </span><span class="Comment">//: assume segment registers are hard-coded to 0</span>
<span id="L9" class="LineNr"> 9 </span><span class="Comment">//: no floating-point, MMX, etc. yet</span>
<span id="L10" class="LineNr"> 10 </span>
<span id="L11" class="LineNr"> 11 </span><span class="Delimiter">:(before "End Types")</span>
<span id="L12" class="LineNr"> 12 </span><span class="Normal">enum</span> <span class="Delimiter">{</span>
<span id="L13" class="LineNr"> 13 </span> <a href='010---vm.cc.html#L13'>EAX</a><span class="Delimiter">,</span>
<span id="L14" class="LineNr"> 14 </span> <a href='010---vm.cc.html#L14'>ECX</a><span class="Delimiter">,</span>
<span id="L15" class="LineNr"> 15 </span> <a href='010---vm.cc.html#L15'>EDX</a><span class="Delimiter">,</span>
<span id="L16" class="LineNr"> 16 </span> <a href='010---vm.cc.html#L16'>EBX</a><span class="Delimiter">,</span>
<span id="L17" class="LineNr"> 17 </span> <a href='010---vm.cc.html#L17'>ESP</a><span class="Delimiter">,</span>
<span id="L18" class="LineNr"> 18 </span> <a href='010---vm.cc.html#L18'>EBP</a><span class="Delimiter">,</span>
<span id="L19" class="LineNr"> 19 </span> <a href='010---vm.cc.html#L19'>ESI</a><span class="Delimiter">,</span>
<span id="L20" class="LineNr"> 20 </span> <a href='010---vm.cc.html#L20'>EDI</a><span class="Delimiter">,</span>
<span id="L21" class="LineNr"> 21 </span> <a href='010---vm.cc.html#L21'>NUM_INT_REGISTERS</a><span class="Delimiter">,</span>
<span id="L22" class="LineNr"> 22 </span><span class="Delimiter">};</span>
<span id="L23" class="LineNr"> 23 </span><span class="Normal">union</span> <a href='010---vm.cc.html#L23'>reg</a> <span class="Delimiter">{</span>
<span id="L24" class="LineNr"> 24 </span> <span class="Normal">int32_t</span> i<span class="Delimiter">;</span>
<span id="L25" class="LineNr"> 25 </span> <span class="Normal">uint32_t</span> u<span class="Delimiter">;</span>
<span id="L26" class="LineNr"> 26 </span><span class="Delimiter">};</span>
<span id="L27" class="LineNr"> 27 </span><span class="Delimiter">:(before "End Globals")</span>
<span id="L28" class="LineNr"> 28 </span><a href='010---vm.cc.html#L23'>reg</a> <span class="Special"><a href='010---vm.cc.html#L28'>Reg</a></span>[NUM_INT_REGISTERS] = <span class="Delimiter">{</span> <span class="Delimiter">{</span><span class="Constant">0</span><span class="Delimiter">}</span> <span class="Delimiter">};</span>
<span id="L29" class="LineNr"> 29 </span><span class="Normal">uint32_t</span> EIP = <span class="Constant">1</span><span class="Delimiter">;</span> <span class="Comment">// preserve null pointer</span>
<span id="L30" class="LineNr"> 30 </span><span class="Delimiter">:(before "End Reset")</span>
<span id="L31" class="LineNr"> 31 </span>bzero<span class="Delimiter">(</span><span class="Special"><a href='010---vm.cc.html#L28'>Reg</a></span><span class="Delimiter">,</span> <span class="Normal">sizeof</span><span class="Delimiter">(</span><span class="Special"><a href='010---vm.cc.html#L28'>Reg</a></span><span class="Delimiter">));</span>
<span id="L32" class="LineNr"> 32 </span>EIP = <span class="Constant">1</span><span class="Delimiter">;</span> <span class="Comment">// preserve null pointer</span>
<span id="L33" class="LineNr"> 33 </span>
<span id="L34" class="LineNr"> 34 </span><span class="Delimiter">:(before "End <a href='001help.cc.html#L53'>Help</a> Contents")</span>
<span id="L35" class="LineNr"> 35 </span>cerr << <span class="Constant">" registers\n"</span><span class="Delimiter">;</span>
<span id="L36" class="LineNr"> 36 </span><span class="Delimiter">:(before "End <a href='001help.cc.html#L53'>Help</a> Texts")</span>
<span id="L37" class="LineNr"> 37 </span><a href='001help.cc.html#L262'>put_new</a><span class="Delimiter">(</span><span class="Special"><a href='001help.cc.html#L53'>Help</a></span><span class="Delimiter">,</span> <span class="Constant">"registers"</span><span class="Delimiter">,</span>
<span id="L38" class="LineNr"> 38 </span> <span class="Constant">"SubX currently supports eight 32-bit integer registers. From 0 to 7, they are:\n"</span>
<span id="L39" class="LineNr"> 39 </span> <span class="Constant">" <a href='010---vm.cc.html#L13'>EAX</a> <a href='010---vm.cc.html#L14'>ECX</a> <a href='010---vm.cc.html#L15'>EDX</a> <a href='010---vm.cc.html#L16'>EBX</a> <a href='010---vm.cc.html#L17'>ESP</a> <a href='010---vm.cc.html#L18'>EBP</a> <a href='010---vm.cc.html#L19'>ESI</a> EDI\n"</span>
<span id="L40" class="LineNr"> 40 </span> <span class="Constant">"ESP contains the top of the stack.\n"</span>
<span id="L41" class="LineNr"> 41 </span> <span class="Constant">"\n"</span>
<span id="L42" class="LineNr"> 42 </span> <span class="Constant">"-- 8-bit registers\n"</span>
<span id="L43" class="LineNr"> 43 </span> <span class="Constant">"Some instructions operate on eight *overlapping* 8-bit registers.\n"</span>
<span id="L44" class="LineNr"> 44 </span> <span class="Constant">"From 0 to 7, they are:\n"</span>
<span id="L45" class="LineNr"> 45 </span> <span class="Constant">" AL CL DL BL AH CH DH BH\n"</span>
<span id="L46" class="LineNr"> 46 </span> <span class="Constant">"The 8-bit registers overlap with the 32-bit ones. AL is the lowest signicant byte\n"</span>
<span id="L47" class="LineNr"> 47 </span> <span class="Constant">"of <a href='010---vm.cc.html#L13'>EAX</a>, AH is the second lowest significant byte, and so on.\n"</span>
<span id="L48" class="LineNr"> 48 </span> <span class="Constant">"\n"</span>
<span id="L49" class="LineNr"> 49 </span> <span class="Constant">"For example, if <a href='010---vm.cc.html#L16'>EBX</a> contains 0x11223344, then BL contains 0x44, and BH contains 0x33.\n"</span>
<span id="L50" class="LineNr"> 50 </span> <span class="Constant">"\n"</span>
<span id="L51" class="LineNr"> 51 </span> <span class="Constant">"There is no way to access bytes within <a href='010---vm.cc.html#L17'>ESP</a>, <a href='010---vm.cc.html#L18'>EBP</a>, <a href='010---vm.cc.html#L19'>ESI</a> or EDI.\n"</span>
<span id="L52" class="LineNr"> 52 </span> <span class="Constant">"\n"</span>
<span id="L53" class="LineNr"> 53 </span> <span class="Constant">"For complete details consult the IA-32 software developer's manual, volume 2,\n"</span>
<span id="L54" class="LineNr"> 54 </span> <span class="Constant">"table 2-2, \"</span><span class="Constant">32</span>-bit addressing forms with the ModR/<span class="Special">M</span> byte\<span class="Constant">".\n"</span>
<span id="L55" class="LineNr"> 55 </span> <span class="Constant">"It is included in this repository as 'modrm.pdf'.\n"</span>
<span id="L56" class="LineNr"> 56 </span> <span class="Constant">"The register encodings are described in the top row of the table, but you'll need\n"</span>
<span id="L57" class="LineNr"> 57 </span> <span class="Constant">"to spend some time with it.\n"</span>
<span id="L58" class="LineNr"> 58 </span> <span class="Constant">"\n"</span>
<span id="L59" class="LineNr"> 59 </span> <span class="Constant">"-- flag registers\n"</span>
<span id="L60" class="LineNr"> 60 </span> <span class="Constant">"Various instructions (particularly 'compare') modify one or more of three 1-bit 'flag'\n"</span>
<span id="L61" class="LineNr"> 61 </span> <span class="Constant">"registers, as a side-effect:\n"</span>
<span id="L62" class="LineNr"> 62 </span> <span class="Constant">"- the sign flag (SF): usually set if an arithmetic result is negative, or\n"</span>
<span id="L63" class="LineNr"> 63 </span> <span class="Constant">" <a href='000organization.cc.html#L148'>reset</a> if not.\n"</span>
<span id="L64" class="LineNr"> 64 </span> <span class="Constant">"- the zero flag (ZF): usually set if a result is zero, or <a href='000organization.cc.html#L148'>reset</a> if not.\n"</span>
<span id="L65" class="LineNr"> 65 </span> <span class="Constant">"- the overflow flag (OF): usually set if an arithmetic result overflows.\n"</span>
<span id="L66" class="LineNr"> 66 </span> <span class="Constant">"The flag bits are read by conditional jumps.\n"</span>
<span id="L67" class="LineNr"> 67 </span> <span class="Constant">"\n"</span>
<span id="L68" class="LineNr"> 68 </span> <span class="Constant">"For complete details on how different instructions update the flags, consult the IA-32\n"</span>
<span id="L69" class="LineNr"> 69 </span> <span class="Constant">"manual (volume 2). There's various versions of it online, such as <a href="https://c9x.me/x86">https://c9x.me/x86</a>,\n"</span>
<span id="L70" class="LineNr"> 70 </span> <span class="Constant">"though of course you'll need to be careful to ignore instructions and flag registers\n"</span>
<span id="L71" class="LineNr"> 71 </span> <span class="Constant">"that SubX doesn't support.\n"</span>
<span id="L72" class="LineNr"> 72 </span> <span class="Constant">"\n"</span>
<span id="L73" class="LineNr"> 73 </span> <span class="Constant">"It isn't simple, but if this is the processor you have running on your computer,\n"</span>
<span id="L74" class="LineNr"> 74 </span> <span class="Constant">"might as well get good at it.\n"</span>
<span id="L75" class="LineNr"> 75 </span><span class="Delimiter">);</span>
<span id="L76" class="LineNr"> 76 </span>
<span id="L77" class="LineNr"> 77 </span><span class="Delimiter">:(before "End Globals")</span>
<span id="L78" class="LineNr"> 78 </span><span class="Comment">// the subset of x86 flag registers we care about</span>
<span id="L79" class="LineNr"> 79 </span><span class="Normal">bool</span> SF =<span class="Constant"> false</span><span class="Delimiter">;</span> <span class="Comment">// sign flag</span>
<span id="L80" class="LineNr"> 80 </span><span class="Normal">bool</span> ZF =<span class="Constant"> false</span><span class="Delimiter">;</span> <span class="Comment">// zero flag</span>
<span id="L81" class="LineNr"> 81 </span><span class="Normal">bool</span> <a href='010---vm.cc.html#L81'>OF</a> =<span class="Constant"> false</span><span class="Delimiter">;</span> <span class="Comment">// overflow flag</span>
<span id="L82" class="LineNr"> 82 </span><span class="Delimiter">:(before "End Reset")</span>
<span id="L83" class="LineNr"> 83 </span>SF = ZF = <a href='010---vm.cc.html#L81'>OF</a> =<span class="Constant"> false</span><span class="Delimiter">;</span>
<span id="L84" class="LineNr"> 84 </span>
<span id="L85" class="LineNr"> 85 </span><span class="Comment">//: how the flag registers are updated after each instruction</span>
<span id="L86" class="LineNr"> 86 </span>
<span id="L87" class="LineNr"> 87 </span><span class="Delimiter">:(before "End Includes")</span>
<span id="L88" class="LineNr"> 88 </span><span class="Comment">// Combine 'arg1' and 'arg2' with arithmetic operation 'op' and store the</span>
<span id="L89" class="LineNr"> 89 </span><span class="Comment">// result in 'arg1', then update flags.</span>
<span id="L90" class="LineNr"> 90 </span><span class="Comment">// beware: no side-effects in args</span>
<span id="L91" class="LineNr"> 91 </span><span class="Comment">#define BINARY_ARITHMETIC_OP(op, arg1, arg2) { \</span>
<span id="L92" class="LineNr"> 92 </span> <span class="Comment">/*</span><span class="Comment"> arg1 and arg2 must be signed </span><span class="Comment">*/</span> \
<span id="L93" class="LineNr"> 93 </span> <span class="Normal">int64_t</span> tmp = arg1 op arg2<span class="Delimiter">;</span> \
<span id="L94" class="LineNr"> 94 </span> arg1 = arg1 op arg2<span class="Delimiter">;</span> \
<span id="L95" class="LineNr"> 95 </span> <a href='003trace.cc.html#L183'>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">"storing 0x"</span> << <a href='010---vm.cc.html#L413'>HEXWORD</a> << arg1 << end<span class="Delimiter">();</span> \
<span id="L96" class="LineNr"> 96 </span> SF = <span class="Delimiter">(</span>arg1 < <span class="Constant">0</span><span class="Delimiter">);</span> \
<span id="L97" class="LineNr"> 97 </span> ZF = <span class="Delimiter">(</span>arg1 == <span class="Constant">0</span><span class="Delimiter">);</span> \
<span id="L98" class="LineNr"> 98 </span> <a href='010---vm.cc.html#L81'>OF</a> = <span class="Delimiter">(</span>arg1 != tmp<span class="Delimiter">);</span> \
<span id="L99" class="LineNr"> 99 </span><span class="Delimiter">}</span>
<span id="L100" class="LineNr">100 </span>
<span id="L101" class="LineNr">101 </span><span class="Comment">// Combine 'arg1' and 'arg2' with bitwise operation 'op' and store the result</span>
<span id="L102" class="LineNr">102 </span><span class="Comment">// in 'arg1', then update flags.</span>
<span id="L103" class="LineNr">103 </span><span class="Comment">#define BINARY_BITWISE_OP(op, arg1, arg2) { \</span>
<span id="L104" class="LineNr">104 </span> <span class="Comment">/*</span><span class="Comment"> arg1 and arg2 must be unsigned </span><span class="Comment">*/</span> \
<span id="L105" class="LineNr">105 </span> arg1 = arg1 op arg2<span class="Delimiter">;</span> \
<span id="L106" class="LineNr">106 </span> <a href='003trace.cc.html#L183'>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">"storing 0x"</span> << <a href='010---vm.cc.html#L413'>HEXWORD</a> << arg1 << end<span class="Delimiter">();</span> \
<span id="L107" class="LineNr">107 </span> SF = <span class="Delimiter">(</span>arg1 >> <span class="Constant">31</span><span class="Delimiter">);</span> \
<span id="L108" class="LineNr">108 </span> ZF = <span class="Delimiter">(</span>arg1 == <span class="Constant">0</span><span class="Delimiter">);</span> \
<span id="L109" class="LineNr">109 </span> <a href='010---vm.cc.html#L81'>OF</a> =<span class="Constant"> false</span><span class="Delimiter">;</span> \
<span id="L110" class="LineNr">110 </span><span class="Delimiter">}</span>
<span id="L111" class="LineNr">111 </span>
<span id="L112" class="LineNr">112 </span><span class="SalientComment">//:: simulated RAM</span>
<span id="L113" class="LineNr">113 </span>
<span id="L114" class="LineNr">114 </span><span class="Delimiter">:(before "End Types")</span>
<span id="L115" class="LineNr">115 </span><span class="Normal">const</span> <span class="Normal">uint32_t</span> <a href='010---vm.cc.html#L115'>SEGMENT_ALIGNMENT</a> = <span class="Constant">0x1000000</span><span class="Delimiter">;</span> <span class="Comment">// 16MB</span>
<span id="L116" class="LineNr">116 </span><span class="Normal">inline</span> <span class="Normal">uint32_t</span> <a href='010---vm.cc.html#L116'>align_upwards</a><span class="Delimiter">(</span><span class="Normal">uint32_t</span> x<span class="Delimiter">,</span> <span class="Normal">uint32_t</span> align<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L117" class="LineNr">117 </span> <span class="Identifier">return</span> <span class="Delimiter">(</span>x+align-<span class="Constant">1</span><span class="Delimiter">)</span> & -<span class="Delimiter">(</span>align<span class="Delimiter">);</span>
<span id="L118" class="LineNr">118 </span><span class="Delimiter">}</span>
<span id="L119" class="LineNr">119 </span>
<span id="L120" class="LineNr">120 </span><span class="Comment">// Like in real-world Linux, we'll allocate RAM for our programs in disjoint</span>
<span id="L121" class="LineNr">121 </span><span class="Comment">// slabs called VMAs or Virtual Memory Areas.</span>
<span id="L122" class="LineNr">122 </span><span class="Normal">struct</span> vma <span class="Delimiter">{</span>
<span id="L123" class="LineNr">123 </span> <span class="Normal">uint32_t</span> start<span class="Delimiter">;</span> <span class="Comment">// inclusive</span>
<span id="L124" class="LineNr">124 </span> <span class="Normal">uint32_t</span> end<span class="Delimiter">;</span> <span class="Comment">// exclusive</span>
<span id="L125" class="LineNr">125 </span> vector<<span class="Normal">uint8_t</span>> <a href='010---vm.cc.html#L125'>_data</a><span class="Delimiter">;</span>
<span id="L126" class="LineNr">126 </span> vma<span class="Delimiter">(</span><span class="Normal">uint32_t</span> s<span class="Delimiter">,</span> <span class="Normal">uint32_t</span> e<span class="Delimiter">)</span> :start<span class="Delimiter">(</span>s<span class="Delimiter">),</span> end<span class="Delimiter">(</span>e<span class="Delimiter">)</span> <span class="Delimiter">{}</span>
<span id="L127" class="LineNr">127 </span> vma<span class="Delimiter">(</span><span class="Normal">uint32_t</span> s<span class="Delimiter">)</span> :start<span class="Delimiter">(</span>s<span class="Delimiter">),</span> end<span class="Delimiter">(</span><a href='010---vm.cc.html#L116'>align_upwards</a><span class="Delimiter">(</span>s+<span class="Constant">1</span><span class="Delimiter">,</span> <a href='010---vm.cc.html#L115'>SEGMENT_ALIGNMENT</a><span class="Delimiter">))</span> <span class="Delimiter">{}</span>
<span id="L128" class="LineNr">128 </span> <span class="Normal">bool</span> <a href='010---vm.cc.html#L128'>match</a><span class="Delimiter">(</span><span class="Normal">uint32_t</span> a<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L129" class="LineNr">129 </span> <span class="Identifier">return</span> a >= start && a < end<span class="Delimiter">;</span>
<span id="L130" class="LineNr">130 </span> <span class="Delimiter">}</span>
<span id="L131" class="LineNr">131 </span> <span class="Normal">bool</span> <a href='010---vm.cc.html#L131'>match32</a><span class="Delimiter">(</span><span class="Normal">uint32_t</span> a<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L132" class="LineNr">132 </span> <span class="Identifier">return</span> a >= start && a+<span class="Constant">4</span> <= end<span class="Delimiter">;</span>
<span id="L133" class="LineNr">133 </span> <span class="Delimiter">}</span>
<span id="L134" class="LineNr">134 </span> <span class="Normal">uint8_t</span>& data<span class="Delimiter">(</span><span class="Normal">uint32_t</span> a<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L135" class="LineNr">135 </span> assert<span class="Delimiter">(</span><a href='010---vm.cc.html#L128'>match</a><span class="Delimiter">(</span>a<span class="Delimiter">));</span>
<span id="L136" class="LineNr">136 </span> <span class="Normal">uint32_t</span> result_index = a-start<span class="Delimiter">;</span>
<span id="L137" class="LineNr">137 </span> <span class="Normal">if</span> <span class="Delimiter">(</span><a href='010---vm.cc.html#L125'>_data</a><span class="Delimiter">.</span>size<span class="Delimiter">()</span> <= result_index<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L138" class="LineNr">138 </span> <span class="Normal">const</span> <span class="Normal">int</span> align = <span class="Constant">0x1000</span><span class="Delimiter">;</span>
<span id="L139" class="LineNr">139 </span> <span class="Normal">uint32_t</span> result_size = result_index + <span class="Constant">1</span><span class="Delimiter">;</span> <span class="Comment">// size needed for result_index to be valid</span>
<span id="L140" class="LineNr">140 </span> <span class="Normal">uint32_t</span> new_size = <a href='010---vm.cc.html#L116'>align_upwards</a><span class="Delimiter">(</span>result_size<span class="Delimiter">,</span> align<span class="Delimiter">);</span>
<span id="L141" class="LineNr">141 </span> <span class="Comment">// grow at least 2x to maintain some amortized complexity guarantees</span>
<span id="L142" class="LineNr">142 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>new_size < <a href='010---vm.cc.html#L125'>_data</a><span class="Delimiter">.</span>size<span class="Delimiter">()</span> * <span class="Constant">2</span><span class="Delimiter">)</span>
<span id="L143" class="LineNr">143 </span> new_size = <a href='010---vm.cc.html#L125'>_data</a><span class="Delimiter">.</span>size<span class="Delimiter">()</span> * <span class="Constant">2</span><span class="Delimiter">;</span>
<span id="L144" class="LineNr">144 </span> <span class="Comment">// never grow past the stated limit</span>
<span id="L145" class="LineNr">145 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>new_size > end-start<span class="Delimiter">)</span>
<span id="L146" class="LineNr">146 </span> new_size = end-start<span class="Delimiter">;</span>
<span id="L147" class="LineNr">147 </span> <a href='010---vm.cc.html#L125'>_data</a><span class="Delimiter">.</span>resize<span class="Delimiter">(</span>new_size<span class="Delimiter">);</span>
<span id="L148" class="LineNr">148 </span> <span class="Delimiter">}</span>
<span id="L149" class="LineNr">149 </span> <span class="Identifier">return</span> <a href='010---vm.cc.html#L125'>_data</a><span class="Delimiter">.</span>at<span class="Delimiter">(</span>result_index<span class="Delimiter">);</span>
<span id="L150" class="LineNr">150 </span> <span class="Delimiter">}</span>
<span id="L151" class="LineNr">151 </span> <span class="Normal">void</span> <a href='010---vm.cc.html#L151'>grow_until</a><span class="Delimiter">(</span><span class="Normal">uint32_t</span> new_end_address<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L152" class="LineNr">152 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>new_end_address < end<span class="Delimiter">)</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
<span id="L153" class="LineNr">153 </span> <span class="Comment">// Ugly: vma knows about the global Memory list of vmas</span>
<span id="L154" class="LineNr">154 </span> <span class="Normal">void</span> <a href='010---vm.cc.html#L161'>sanity_check</a><span class="Delimiter">(</span><span class="Normal">uint32_t</span> start<span class="Delimiter">,</span> <span class="Normal">uint32_t</span> end<span class="Delimiter">);</span>
<span id="L155" class="LineNr">155 </span> <a href='010---vm.cc.html#L161'>sanity_check</a><span class="Delimiter">(</span>start<span class="Delimiter">,</span> new_end_address<span class="Delimiter">);</span>
<span id="L156" class="LineNr">156 </span> end = new_end_address<span class="Delimiter">;</span>
<span id="L157" class="LineNr">157 </span> <span class="Delimiter">}</span>
<span id="L158" class="LineNr">158 </span> <span class="Comment">// End vma Methods</span>
<span id="L159" class="LineNr">159 </span><span class="Delimiter">};</span>
<span id="L160" class="LineNr">160 </span><span class="Delimiter">:(code)</span>
<span id="L161" class="LineNr">161 </span><span class="Normal">void</span> <a href='010---vm.cc.html#L161'>sanity_check</a><span class="Delimiter">(</span><span class="Normal">uint32_t</span> start<span class="Delimiter">,</span> <span class="Normal">uint32_t</span> end<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L162" class="LineNr">162 </span> <span class="Normal">bool</span> dup_found =<span class="Constant"> false</span><span class="Delimiter">;</span>
<span id="L163" class="LineNr">163 </span> <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i < <a href='001help.cc.html#L166'>SIZE</a><span class="Delimiter">(</span><span class="Special"><a href='010---vm.cc.html#L180'>Mem</a></span><span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L164" class="LineNr">164 </span> <span class="Normal">const</span> vma& curr = <span class="Special"><a href='010---vm.cc.html#L180'>Mem</a></span><span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
<span id="L165" class="LineNr">165 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>curr<span class="Delimiter">.</span>start == start<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L166" class="LineNr">166 </span> assert<span class="Delimiter">(</span>!dup_found<span class="Delimiter">);</span>
<span id="L167" class="LineNr">167 </span> dup_found =<span class="Constant"> true</span><span class="Delimiter">;</span>
<span id="L168" class="LineNr">168 </span> <span class="Delimiter">}</span>
<span id="L169" class="LineNr">169 </span> <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>curr<span class="Delimiter">.</span>start > start<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L170" class="LineNr">170 </span> assert<span class="Delimiter">(</span>curr<span class="Delimiter">.</span>start > end<span class="Delimiter">);</span>
<span id="L171" class="LineNr">171 </span> <span class="Delimiter">}</span>
<span id="L172" class="LineNr">172 </span> <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>curr<span class="Delimiter">.</span>start < start<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L173" class="LineNr">173 </span> assert<span class="Delimiter">(</span>curr<span class="Delimiter">.</span>end < start<span class="Delimiter">);</span>
<span id="L174" class="LineNr">174 </span> <span class="Delimiter">}</span>
<span id="L175" class="LineNr">175 </span> <span class="Delimiter">}</span>
<span id="L176" class="LineNr">176 </span><span class="Delimiter">}</span>
<span id="L177" class="LineNr">177 </span>
<span id="L178" class="LineNr">178 </span><span class="Delimiter">:(before "End Globals")</span>
<span id="L179" class="LineNr">179 </span><span class="Comment">// RAM is made of VMAs.</span>
<span id="L180" class="LineNr">180 </span>vector<vma> <span class="Special"><a href='010---vm.cc.html#L180'>Mem</a></span><span class="Delimiter">;</span>
<span id="L181" class="LineNr">181 </span><span class="Delimiter">:(code)</span>
<span id="L182" class="LineNr">182 </span><span class="Comment">// The first 3 VMAs are special. When loading ELF binaries in later layers,</span>
<span id="L183" class="LineNr">183 </span><span class="Comment">// we'll assume that the first VMA is for code, the second is for data</span>
<span id="L184" class="LineNr">184 </span><span class="Comment">// (including the heap), and the third for the stack.</span>
<span id="L185" class="LineNr">185 </span><span class="Normal">void</span> <a href='010---vm.cc.html#L185'>grow_code_segment</a><span class="Delimiter">(</span><span class="Normal">uint32_t</span> new_end_address<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L186" class="LineNr">186 </span> assert<span class="Delimiter">(</span>!<span class="Special"><a href='010---vm.cc.html#L180'>Mem</a></span><span class="Delimiter">.</span>empty<span class="Delimiter">());</span>
<span id="L187" class="LineNr">187 </span> <span class="Special"><a href='010---vm.cc.html#L180'>Mem</a></span><span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span><a href='010---vm.cc.html#L151'>grow_until</a><span class="Delimiter">(</span>new_end_address<span class="Delimiter">);</span>
<span id="L188" class="LineNr">188 </span><span class="Delimiter">}</span>
<span id="L189" class="LineNr">189 </span><span class="Normal">void</span> <a href='010---vm.cc.html#L189'>grow_data_segment</a><span class="Delimiter">(</span><span class="Normal">uint32_t</span> new_end_address<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L190" class="LineNr">190 </span> assert<span class="Delimiter">(</span><a href='001help.cc.html#L166'>SIZE</a><span class="Delimiter">(</span><span class="Special"><a href='010---vm.cc.html#L180'>Mem</a></span><span class="Delimiter">)</span> > <span class="Constant">1</span><span class="Delimiter">);</span>
<span id="L191" class="LineNr">191 </span> <span class="Special"><a href='010---vm.cc.html#L180'>Mem</a></span><span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span><a href='010---vm.cc.html#L151'>grow_until</a><span class="Delimiter">(</span>new_end_address<span class="Delimiter">);</span>
<span id="L192" class="LineNr">192 </span><span class="Delimiter">}</span>
<span id="L193" class="LineNr">193 </span><span class="Delimiter">:(before "End Globals")</span>
<span id="L194" class="LineNr">194 </span><span class="Normal">uint32_t</span> <span class="Special"><a href='010---vm.cc.html#L194'>End_of_program</a></span> = <span class="Constant">0</span><span class="Delimiter">;</span> <span class="Comment">// when the program executes past this address in tests we'll stop the test</span>
<span id="L195" class="LineNr">195 </span><span class="Comment">// The stack grows downward. Can't increase its size for now.</span>
<span id="L196" class="LineNr">196 </span><span class="Delimiter">:(before "End Reset")</span>
<span id="L197" class="LineNr">197 </span><span class="Special"><a href='010---vm.cc.html#L180'>Mem</a></span><span class="Delimiter">.</span>clear<span class="Delimiter">();</span>
<span id="L198" class="LineNr">198 </span><span class="Special"><a href='010---vm.cc.html#L194'>End_of_program</a></span> = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L199" class="LineNr">199 </span><span class="Delimiter">:(code)</span>
<span id="L200" class="LineNr">200 </span><span class="Comment">// These helpers depend on Mem being laid out contiguously (so you can't use a</span>
<span id="L201" class="LineNr">201 </span><span class="Comment">// map, etc.) and on the host also being little-endian.</span>
<span id="L202" class="LineNr">202 </span><span class="Normal">inline</span> <span class="Normal">uint8_t</span> <a href='010---vm.cc.html#L202'>read_mem_u8</a><span class="Delimiter">(</span><span class="Normal">uint32_t</span> addr<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L203" class="LineNr">203 </span> <span class="Normal">uint8_t</span>* handle = <a href='010---vm.cc.html#L217'>mem_addr_u8</a><span class="Delimiter">(</span>addr<span class="Delimiter">);</span> <span class="Comment">// error messages get printed here</span>
<span id="L204" class="LineNr">204 </span> <span class="Identifier">return</span> handle ? *handle : <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L205" class="LineNr">205 </span><span class="Delimiter">}</span>
<span id="L206" class="LineNr">206 </span><span class="Normal">inline</span> <span class="Normal">int8_t</span> <a href='010---vm.cc.html#L206'>read_mem_i8</a><span class="Delimiter">(</span><span class="Normal">uint32_t</span> addr<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L207" class="LineNr">207 </span> <span class="Identifier">return</span> <span class="Normal">static_cast</span><<span class="Normal">int8_t</span>><span class="Delimiter">(</span><a href='010---vm.cc.html#L202'>read_mem_u8</a><span class="Delimiter">(</span>addr<span class="Delimiter">));</span>
<span id="L208" class="LineNr">208 </span><span class="Delimiter">}</span>
<span id="L209" class="LineNr">209 </span><span class="Normal">inline</span> <span class="Normal">uint32_t</span> <a href='010---vm.cc.html#L209'>read_mem_u32</a><span class="Delimiter">(</span><span class="Normal">uint32_t</span> addr<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L210" class="LineNr">210 </span> <span class="Normal">uint32_t</span>* handle = <a href='010---vm.cc.html#L233'>mem_addr_u32</a><span class="Delimiter">(</span>addr<span class="Delimiter">);</span> <span class="Comment">// error messages get printed here</span>
<span id="L211" class="LineNr">211 </span> <span class="Identifier">return</span> handle ? *handle : <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L212" class="LineNr">212 </span><span class="Delimiter">}</span>
<span id="L213" class="LineNr">213 </span><span class="Normal">inline</span> <span class="Normal">int32_t</span> <a href='010---vm.cc.html#L213'>read_mem_i32</a><span class="Delimiter">(</span><span class="Normal">uint32_t</span> addr<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L214" class="LineNr">214 </span> <span class="Identifier">return</span> <span class="Normal">static_cast</span><<span class="Normal">int32_t</span>><span class="Delimiter">(</span><a href='010---vm.cc.html#L209'>read_mem_u32</a><span class="Delimiter">(</span>addr<span class="Delimiter">));</span>
<span id="L215" class="LineNr">215 </span><span class="Delimiter">}</span>
<span id="L216" class="LineNr">216 </span>
<span id="L217" class="LineNr">217 </span><span class="Normal">inline</span> <span class="Normal">uint8_t</span>* <a href='010---vm.cc.html#L217'>mem_addr_u8</a><span class="Delimiter">(</span><span class="Normal">uint32_t</span> addr<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L218" class="LineNr">218 </span> <span class="Normal">uint8_t</span>* result = <span class="Constant">NULL</span><span class="Delimiter">;</span>
<span id="L219" class="LineNr">219 </span> <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i < <a href='001help.cc.html#L166'>SIZE</a><span class="Delimiter">(</span><span class="Special"><a href='010---vm.cc.html#L180'>Mem</a></span><span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L220" class="LineNr">220 </span> <span class="Normal">if</span> <span class="Delimiter">(</span><span class="Special"><a href='010---vm.cc.html#L180'>Mem</a></span><span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span><a href='010---vm.cc.html#L128'>match</a><span class="Delimiter">(</span>addr<span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span id="L221" class="LineNr">221 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>result<span class="Delimiter">)</span>
<span id="L222" class="LineNr">222 </span> <a href='003trace.cc.html#L190'>raise</a> << <span class="Constant">"address 0x"</span> << <a href='010---vm.cc.html#L413'>HEXWORD</a> << addr << <span class="Constant">" is in two segments\n"</span> << end<span class="Delimiter">();</span>
<span id="L223" class="LineNr">223 </span> result = &<span class="Special"><a href='010---vm.cc.html#L180'>Mem</a></span><span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>data<span class="Delimiter">(</span>addr<span class="Delimiter">);</span>
<span id="L224" class="LineNr">224 </span> <span class="Delimiter">}</span>
<span id="L225" class="LineNr">225 </span> <span class="Delimiter">}</span>
<span id="L226" class="LineNr">226 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>result == <span class="Constant">NULL</span><span class="Delimiter">)</span>
<span id="L227" class="LineNr">227 </span> <a href='003trace.cc.html#L190'>raise</a> << <span class="Constant">"Tried to access uninitialized memory at address 0x"</span> << <a href='010---vm.cc.html#L413'>HEXWORD</a> << addr << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span>
<span id="L228" class="LineNr">228 </span> <span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span id="L229" class="LineNr">229 </span><span class="Delimiter">}</span>
<span id="L230" class="LineNr">230 </span><span class="Normal">inline</span> <span class="Normal">int8_t</span>* <a href='010---vm.cc.html#L230'>mem_addr_i8</a><span class="Delimiter">(</span><span class="Normal">uint32_t</span> addr<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L231" class="LineNr">231 </span> <span class="Identifier">return</span> <span class="Normal">reinterpret_cast</span><<span class="Normal">int8_t</span>*><span class="Delimiter">(</span><a href='010---vm.cc.html#L217'>mem_addr_u8</a><span class="Delimiter">(</span>addr<span class="Delimiter">));</span>
<span id="L232" class="LineNr">232 </span><span class="Delimiter">}</span>
<span id="L233" class="LineNr">233 </span><span class="Normal">inline</span> <span class="Normal">uint32_t</span>* <a href='010---vm.cc.html#L233'>mem_addr_u32</a><span class="Delimiter">(</span><span class="Normal">uint32_t</span> addr<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L234" class="LineNr">234 </span> <span class="Normal">uint32_t</span>* result = <span class="Constant">NULL</span><span class="Delimiter">;</span>
<span id="L235" class="LineNr">235 </span> <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i < <a href='001help.cc.html#L166'>SIZE</a><span class="Delimiter">(</span><span class="Special"><a href='010---vm.cc.html#L180'>Mem</a></span><span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L236" class="LineNr">236 </span> <span class="Normal">if</span> <span class="Delimiter">(</span><span class="Special"><a href='010---vm.cc.html#L180'>Mem</a></span><span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span><a href='010---vm.cc.html#L131'>match32</a><span class="Delimiter">(</span>addr<span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span id="L237" class="LineNr">237 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>result<span class="Delimiter">)</span>
<span id="L238" class="LineNr">238 </span> <a href='003trace.cc.html#L190'>raise</a> << <span class="Constant">"address 0x"</span> << <a href='010---vm.cc.html#L413'>HEXWORD</a> << addr << <span class="Constant">" is in two segments\n"</span> << end<span class="Delimiter">();</span>
<span id="L239" class="LineNr">239 </span> result = <span class="Normal">reinterpret_cast</span><<span class="Normal">uint32_t</span>*><span class="Delimiter">(</span>&<span class="Special"><a href='010---vm.cc.html#L180'>Mem</a></span><span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>data<span class="Delimiter">(</span>addr<span class="Delimiter">));</span>
<span id="L240" class="LineNr">240 </span> <span class="Delimiter">}</span>
<span id="L241" class="LineNr">241 </span> <span class="Delimiter">}</span>
<span id="L242" class="LineNr">242 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>result == <span class="Constant">NULL</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L243" class="LineNr">243 </span> <a href='003trace.cc.html#L190'>raise</a> << <span class="Constant">"Tried to access uninitialized memory at address 0x"</span> << <a href='010---vm.cc.html#L413'>HEXWORD</a> << addr << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span>
<span id="L244" class="LineNr">244 </span> <a href='003trace.cc.html#L190'>raise</a> << <span class="Constant">"The entire 4-byte <a href='011run.cc.html#L119'>word</a> should be initialized and lie in a single segment.\n"</span> << end<span class="Delimiter">();</span>
<span id="L245" class="LineNr">245 </span> <span class="Delimiter">}</span>
<span id="L246" class="LineNr">246 </span> <span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span id="L247" class="LineNr">247 </span><span class="Delimiter">}</span>
<span id="L248" class="LineNr">248 </span><span class="Normal">inline</span> <span class="Normal">int32_t</span>* <a href='010---vm.cc.html#L248'>mem_addr_i32</a><span class="Delimiter">(</span><span class="Normal">uint32_t</span> addr<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L249" class="LineNr">249 </span> <span class="Identifier">return</span> <span class="Normal">reinterpret_cast</span><<span class="Normal">int32_t</span>*><span class="Delimiter">(</span><a href='010---vm.cc.html#L233'>mem_addr_u32</a><span class="Delimiter">(</span>addr<span class="Delimiter">));</span>
<span id="L250" class="LineNr">250 </span><span class="Delimiter">}</span>
<span id="L251" class="LineNr">251 </span><span class="Comment">// helper for some syscalls. But read-only.</span>
<span id="L252" class="LineNr">252 </span><span class="Normal">inline</span> <span class="Normal">const</span> <span class="Normal">char</span>* <a href='010---vm.cc.html#L252'>mem_addr_kernel_string</a><span class="Delimiter">(</span><span class="Normal">uint32_t</span> addr<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L253" class="LineNr">253 </span> <span class="Identifier">return</span> <span class="Normal">reinterpret_cast</span><<span class="Normal">const</span> <span class="Normal">char</span>*><span class="Delimiter">(</span><a href='010---vm.cc.html#L217'>mem_addr_u8</a><span class="Delimiter">(</span>addr<span class="Delimiter">));</span>
<span id="L254" class="LineNr">254 </span><span class="Delimiter">}</span>
<span id="L255" class="LineNr">255 </span><span class="Normal">inline</span> string <a href='010---vm.cc.html#L255'>mem_addr_string</a><span class="Delimiter">(</span><span class="Normal">uint32_t</span> addr<span class="Delimiter">,</span> <span class="Normal">uint32_t</span> size<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L256" class="LineNr">256 </span> ostringstream out<span class="Delimiter">;</span>
<span id="L257" class="LineNr">257 </span> <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">size_t</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i < size<span class="Delimiter">;</span> ++i<span class="Delimiter">)</span>
<span id="L258" class="LineNr">258 </span> out << <a href='010---vm.cc.html#L202'>read_mem_u8</a><span class="Delimiter">(</span>addr+i<span class="Delimiter">);</span>
<span id="L259" class="LineNr">259 </span> <span class="Identifier">return</span> out<span class="Delimiter">.</span>str<span class="Delimiter">();</span>
<span id="L260" class="LineNr">260 </span><span class="Delimiter">}</span>
<span id="L261" class="LineNr">261 </span>
<span id="L262" class="LineNr">262 </span>
<span id="L263" class="LineNr">263 </span><span class="Normal">inline</span> <span class="Normal">void</span> <a href='010---vm.cc.html#L263'>write_mem_u8</a><span class="Delimiter">(</span><span class="Normal">uint32_t</span> addr<span class="Delimiter">,</span> <span class="Normal">uint8_t</span> val<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L264" class="LineNr">264 </span> <span class="Normal">uint8_t</span>* handle = <a href='010---vm.cc.html#L217'>mem_addr_u8</a><span class="Delimiter">(</span>addr<span class="Delimiter">);</span>
<span id="L265" class="LineNr">265 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>handle != <span class="Constant">NULL</span><span class="Delimiter">)</span> *handle = val<span class="Delimiter">;</span>
<span id="L266" class="LineNr">266 </span><span class="Delimiter">}</span>
<span id="L267" class="LineNr">267 </span><span class="Normal">inline</span> <span class="Normal">void</span> <a href='010---vm.cc.html#L267'>write_mem_i8</a><span class="Delimiter">(</span><span class="Normal">uint32_t</span> addr<span class="Delimiter">,</span> <span class="Normal">int8_t</span> val<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L268" class="LineNr">268 </span> <span class="Normal">int8_t</span>* handle = <a href='010---vm.cc.html#L230'>mem_addr_i8</a><span class="Delimiter">(</span>addr<span class="Delimiter">);</span>
<span id="L269" class="LineNr">269 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>handle != <span class="Constant">NULL</span><span class="Delimiter">)</span> *handle = val<span class="Delimiter">;</span>
<span id="L270" class="LineNr">270 </span><span class="Delimiter">}</span>
<span id="L271" class="LineNr">271 </span><span class="Normal">inline</span> <span class="Normal">void</span> <a href='010---vm.cc.html#L271'>write_mem_u32</a><span class="Delimiter">(</span><span class="Normal">uint32_t</span> addr<span class="Delimiter">,</span> <span class="Normal">uint32_t</span> val<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L272" class="LineNr">272 </span> <span class="Normal">uint32_t</span>* handle = <a href='010---vm.cc.html#L233'>mem_addr_u32</a><span class="Delimiter">(</span>addr<span class="Delimiter">);</span>
<span id="L273" class="LineNr">273 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>handle != <span class="Constant">NULL</span><span class="Delimiter">)</span> *handle = val<span class="Delimiter">;</span>
<span id="L274" class="LineNr">274 </span><span class="Delimiter">}</span>
<span id="L275" class="LineNr">275 </span><span class="Normal">inline</span> <span class="Normal">void</span> <a href='010---vm.cc.html#L275'>write_mem_i32</a><span class="Delimiter">(</span><span class="Normal">uint32_t</span> addr<span class="Delimiter">,</span> <span class="Normal">int32_t</span> val<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L276" class="LineNr">276 </span> <span class="Normal">int32_t</span>* handle = <a href='010---vm.cc.html#L248'>mem_addr_i32</a><span class="Delimiter">(</span>addr<span class="Delimiter">);</span>
<span id="L277" class="LineNr">277 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>handle != <span class="Constant">NULL</span><span class="Delimiter">)</span> *handle = val<span class="Delimiter">;</span>
<span id="L278" class="LineNr">278 </span><span class="Delimiter">}</span>
<span id="L279" class="LineNr">279 </span>
<span id="L280" class="LineNr">280 </span><span class="Normal">inline</span> <span class="Normal">bool</span> <a href='010---vm.cc.html#L280'>already_allocated</a><span class="Delimiter">(</span><span class="Normal">uint32_t</span> addr<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L281" class="LineNr">281 </span> <span class="Normal">bool</span> result =<span class="Constant"> false</span><span class="Delimiter">;</span>
<span id="L282" class="LineNr">282 </span> <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i < <a href='001help.cc.html#L166'>SIZE</a><span class="Delimiter">(</span><span class="Special"><a href='010---vm.cc.html#L180'>Mem</a></span><span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L283" class="LineNr">283 </span> <span class="Normal">if</span> <span class="Delimiter">(</span><span class="Special"><a href='010---vm.cc.html#L180'>Mem</a></span><span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span><a href='010---vm.cc.html#L128'>match</a><span class="Delimiter">(</span>addr<span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span id="L284" class="LineNr">284 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>result<span class="Delimiter">)</span>
<span id="L285" class="LineNr">285 </span> <a href='003trace.cc.html#L190'>raise</a> << <span class="Constant">"address 0x"</span> << <a href='010---vm.cc.html#L413'>HEXWORD</a> << addr << <span class="Constant">" is in two segments\n"</span> << end<span class="Delimiter">();</span>
<span id="L286" class="LineNr">286 </span> result =<span class="Constant"> true</span><span class="Delimiter">;</span>
<span id="L287" class="LineNr">287 </span> <span class="Delimiter">}</span>
<span id="L288" class="LineNr">288 </span> <span class="Delimiter">}</span>
<span id="L289" class="LineNr">289 </span> <span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span id="L290" class="LineNr">290 </span><span class="Delimiter">}</span>
<span id="L291" class="LineNr">291 </span>
<span id="L292" class="LineNr">292 </span><span class="SalientComment">//:: core interpreter loop</span>
<span id="L293" class="LineNr">293 </span>
<span id="L294" class="LineNr">294 </span><span class="Delimiter">:(code)</span>
<span id="L295" class="LineNr">295 </span><span class="Comment">// skeleton of how x86 instructions are decoded</span>
<span id="L296" class="LineNr">296 </span><span class="Normal">void</span> <a href='010---vm.cc.html#L296'>run_one_instruction</a><span class="Delimiter">()</span> <span class="Delimiter">{</span>
<span id="L297" class="LineNr">297 </span> <span class="Normal">uint8_t</span> op=<span class="Constant">0</span><span class="Delimiter">,</span> op2=<span class="Constant">0</span><span class="Delimiter">,</span> op3=<span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L298" class="LineNr">298 </span> <span class="Comment">// Run One Instruction</span>
<span id="L299" class="LineNr">299 </span> <span class="Normal">if</span> <span class="Delimiter">(</span><span class="Special"><a href='003trace.cc.html#L168'>Dump_trace</a></span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L300" class="LineNr">300 </span> cerr << <span class="Constant">"registers: "</span><span class="Delimiter">;</span>
<span id="L301" class="LineNr">301 </span> <a href='010---vm.cc.html#L368'>dump_registers</a><span class="Delimiter">();</span>
<span id="L302" class="LineNr">302 </span><span class="CommentedCode">//? dump_stack(); // for debugging; not defined until later layer</span>
<span id="L303" class="LineNr">303 </span> <span class="Delimiter">}</span>
<span id="L304" class="LineNr">304 </span> <a href='003trace.cc.html#L183'>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">"inst: 0x"</span> << <a href='010---vm.cc.html#L413'>HEXWORD</a> << EIP << end<span class="Delimiter">();</span>
<span id="L305" class="LineNr">305 </span> op = <a href='010---vm.cc.html#L364'>next</a><span class="Delimiter">();</span>
<span id="L306" class="LineNr">306 </span> <span class="Normal">if</span> <span class="Delimiter">(</span><span class="Special"><a href='003trace.cc.html#L168'>Dump_trace</a></span><span class="Delimiter">)</span> cerr << <span class="Constant">"opcode: "</span> << <a href='010---vm.cc.html#L412'>HEXBYTE</a> << <a href='010---vm.cc.html#L415'>NUM</a><span class="Delimiter">(</span>op<span class="Delimiter">)</span> << <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
<span id="L307" class="LineNr">307 </span> <span class="Normal">switch</span> <span class="Delimiter">(</span>op<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L308" class="LineNr">308 </span> <span class="Normal">case</span> <span class="Constant">0xf4</span>: <span class="Comment">// hlt</span>
<span id="L309" class="LineNr">309 </span> EIP = <span class="Special"><a href='010---vm.cc.html#L194'>End_of_program</a></span><span class="Delimiter">;</span>
<span id="L310" class="LineNr">310 </span> <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L311" class="LineNr">311 </span> <span class="Comment">// End Single-Byte Opcodes</span>
<span id="L312" class="LineNr">312 </span> <span class="Normal">case</span> <span class="Constant">0x0f</span>:
<span id="L313" class="LineNr">313 </span> <span class="Normal">switch</span><span class="Delimiter">(</span>op2 = <a href='010---vm.cc.html#L364'>next</a><span class="Delimiter">())</span> <span class="Delimiter">{</span>
<span id="L314" class="LineNr">314 </span> <span class="Comment">// End Two-Byte Opcodes Starting With 0f</span>
<span id="L315" class="LineNr">315 </span> <span class="Normal">default</span>:
<span id="L316" class="LineNr">316 </span> cerr << <span class="Constant">"unrecognized second opcode after 0f: "</span> << <a href='010---vm.cc.html#L412'>HEXBYTE</a> << <a href='010---vm.cc.html#L415'>NUM</a><span class="Delimiter">(</span>op2<span class="Delimiter">)</span> << <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
<span id="L317" class="LineNr">317 </span> <a href='003trace.cc.html#L187'>DUMP</a><span class="Delimiter">(</span><span class="Constant">""</span><span class="Delimiter">);</span>
<span id="L318" class="LineNr">318 </span> exit<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
<span id="L319" class="LineNr">319 </span> <span class="Delimiter">}</span>
<span id="L320" class="LineNr">320 </span> <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L321" class="LineNr">321 </span> <span class="Normal">case</span> <span class="Constant">0xf2</span>:
<span id="L322" class="LineNr">322 </span> <span class="Normal">switch</span><span class="Delimiter">(</span>op2 = <a href='010---vm.cc.html#L364'>next</a><span class="Delimiter">())</span> <span class="Delimiter">{</span>
<span id="L323" class="LineNr">323 </span> <span class="Comment">// End Two-Byte Opcodes Starting With f2</span>
<span id="L324" class="LineNr">324 </span> <span class="Normal">case</span> <span class="Constant">0x0f</span>:
<span id="L325" class="LineNr">325 </span> <span class="Normal">switch</span><span class="Delimiter">(</span>op3 = <a href='010---vm.cc.html#L364'>next</a><span class="Delimiter">())</span> <span class="Delimiter">{</span>
<span id="L326" class="LineNr">326 </span> <span class="Comment">// End Three-Byte Opcodes Starting With f2 0f</span>
<span id="L327" class="LineNr">327 </span> <span class="Normal">default</span>:
<span id="L328" class="LineNr">328 </span> cerr << <span class="Constant">"unrecognized third opcode after f2 0f: "</span> << <a href='010---vm.cc.html#L412'>HEXBYTE</a> << <a href='010---vm.cc.html#L415'>NUM</a><span class="Delimiter">(</span>op3<span class="Delimiter">)</span> << <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
<span id="L329" class="LineNr">329 </span> <a href='003trace.cc.html#L187'>DUMP</a><span class="Delimiter">(</span><span class="Constant">""</span><span class="Delimiter">);</span>
<span id="L330" class="LineNr">330 </span> exit<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
<span id="L331" class="LineNr">331 </span> <span class="Delimiter">}</span>
<span id="L332" class="LineNr">332 </span> <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L333" class="LineNr">333 </span> <span class="Normal">default</span>:
<span id="L334" class="LineNr">334 </span> cerr << <span class="Constant">"unrecognized second opcode after f2: "</span> << <a href='010---vm.cc.html#L412'>HEXBYTE</a> << <a href='010---vm.cc.html#L415'>NUM</a><span class="Delimiter">(</span>op2<span class="Delimiter">)</span> << <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
<span id="L335" class="LineNr">335 </span> <a href='003trace.cc.html#L187'>DUMP</a><span class="Delimiter">(</span><span class="Constant">""</span><span class="Delimiter">);</span>
<span id="L336" class="LineNr">336 </span> exit<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
<span id="L337" class="LineNr">337 </span> <span class="Delimiter">}</span>
<span id="L338" class="LineNr">338 </span> <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L339" class="LineNr">339 </span> <span class="Normal">case</span> <span class="Constant">0xf3</span>:
<span id="L340" class="LineNr">340 </span> <span class="Normal">switch</span><span class="Delimiter">(</span>op2 = <a href='010---vm.cc.html#L364'>next</a><span class="Delimiter">())</span> <span class="Delimiter">{</span>
<span id="L341" class="LineNr">341 </span> <span class="Comment">// End Two-Byte Opcodes Starting With f3</span>
<span id="L342" class="LineNr">342 </span> <span class="Normal">case</span> <span class="Constant">0x0f</span>:
<span id="L343" class="LineNr">343 </span> <span class="Normal">switch</span><span class="Delimiter">(</span>op3 = <a href='010---vm.cc.html#L364'>next</a><span class="Delimiter">())</span> <span class="Delimiter">{</span>
<span id="L344" class="LineNr">344 </span> <span class="Comment">// End Three-Byte Opcodes Starting With f3 0f</span>
<span id="L345" class="LineNr">345 </span> <span class="Normal">default</span>:
<span id="L346" class="LineNr">346 </span> cerr << <span class="Constant">"unrecognized third opcode after f3 0f: "</span> << <a href='010---vm.cc.html#L412'>HEXBYTE</a> << <a href='010---vm.cc.html#L415'>NUM</a><span class="Delimiter">(</span>op3<span class="Delimiter">)</span> << <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
<span id="L347" class="LineNr">347 </span> <a href='003trace.cc.html#L187'>DUMP</a><span class="Delimiter">(</span><span class="Constant">""</span><span class="Delimiter">);</span>
<span id="L348" class="LineNr">348 </span> exit<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
<span id="L349" class="LineNr">349 </span> <span class="Delimiter">}</span>
<span id="L350" class="LineNr">350 </span> <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L351" class="LineNr">351 </span> <span class="Normal">default</span>:
<span id="L352" class="LineNr">352 </span> cerr << <span class="Constant">"unrecognized second opcode after f3: "</span> << <a href='010---vm.cc.html#L412'>HEXBYTE</a> << <a href='010---vm.cc.html#L415'>NUM</a><span class="Delimiter">(</span>op2<span class="Delimiter">)</span> << <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
<span id="L353" class="LineNr">353 </span> <a href='003trace.cc.html#L187'>DUMP</a><span class="Delimiter">(</span><span class="Constant">""</span><span class="Delimiter">);</span>
<span id="L354" class="LineNr">354 </span> exit<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
<span id="L355" class="LineNr">355 </span> <span class="Delimiter">}</span>
<span id="L356" class="LineNr">356 </span> <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L357" class="LineNr">357 </span> <span class="Normal">default</span>:
<span id="L358" class="LineNr">358 </span> cerr << <span class="Constant">"unrecognized opcode: "</span> << <a href='010---vm.cc.html#L412'>HEXBYTE</a> << <a href='010---vm.cc.html#L415'>NUM</a><span class="Delimiter">(</span>op<span class="Delimiter">)</span> << <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
<span id="L359" class="LineNr">359 </span> <a href='003trace.cc.html#L187'>DUMP</a><span class="Delimiter">(</span><span class="Constant">""</span><span class="Delimiter">);</span>
<span id="L360" class="LineNr">360 </span> exit<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
<span id="L361" class="LineNr">361 </span> <span class="Delimiter">}</span>
<span id="L362" class="LineNr">362 </span><span class="Delimiter">}</span>
<span id="L363" class="LineNr">363 </span>
<span id="L364" class="LineNr">364 </span><span class="Normal">inline</span> <span class="Normal">uint8_t</span> <a href='010---vm.cc.html#L364'>next</a><span class="Delimiter">()</span> <span class="Delimiter">{</span>
<span id="L365" class="LineNr">365 </span> <span class="Identifier">return</span> <a href='010---vm.cc.html#L202'>read_mem_u8</a><span class="Delimiter">(</span>EIP++<span class="Delimiter">);</span>
<span id="L366" class="LineNr">366 </span><span class="Delimiter">}</span>
<span id="L367" class="LineNr">367 </span>
<span id="L368" class="LineNr">368 </span><span class="Normal">void</span> <a href='010---vm.cc.html#L368'>dump_registers</a><span class="Delimiter">()</span> <span class="Delimiter">{</span>
<span id="L369" class="LineNr">369 </span> <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i < <a href='010---vm.cc.html#L21'>NUM_INT_REGISTERS</a><span class="Delimiter">;</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L370" class="LineNr">370 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>i > <span class="Constant">0</span><span class="Delimiter">)</span> cerr << <span class="Constant">"; "</span><span class="Delimiter">;</span>
<span id="L371" class="LineNr">371 </span> cerr << <span class="Constant">" "</span> << i << <span class="Constant">": "</span> << std::hex << std::setw<span class="Delimiter">(</span><span class="Constant">8</span><span class="Delimiter">)</span> << std::setfill<span class="Delimiter">(</span><span class="Constant">'_'</span><span class="Delimiter">)</span> << <span class="Special"><a href='010---vm.cc.html#L28'>Reg</a></span>[i]<span class="Delimiter">.</span>u<span class="Delimiter">;</span>
<span id="L372" class="LineNr">372 </span> <span class="Delimiter">}</span>
<span id="L373" class="LineNr">373 </span> cerr << <span class="Constant">" -- SF: "</span> << SF << <span class="Constant">"; ZF: "</span> << ZF << <span class="Constant">"; <a href='010---vm.cc.html#L81'>OF</a>: "</span> << <a href='010---vm.cc.html#L81'>OF</a> << <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
<span id="L374" class="LineNr">374 </span><span class="Delimiter">}</span>
<span id="L375" class="LineNr">375 </span>
<span id="L376" class="LineNr">376 </span><span class="Comment">//: start tracking supported opcodes</span>
<span id="L377" class="LineNr">377 </span><span class="Delimiter">:(before "End Globals")</span>
<span id="L378" class="LineNr">378 </span>map<<span class="Comment">/*</span><span class="Comment">op</span><span class="Comment">*/</span>string<span class="Delimiter">,</span> string> <span class="Special"><a href='010---vm.cc.html#L378'>Name</a></span><span class="Delimiter">;</span>
<span id="L379" class="LineNr">379 </span>map<<span class="Comment">/*</span><span class="Comment">op</span><span class="Comment">*/</span>string<span class="Delimiter">,</span> string> <span class="Special"><a href='010---vm.cc.html#L379'>Name_0f</a></span><span class="Delimiter">;</span>
<span id="L380" class="LineNr">380 </span>map<<span class="Comment">/*</span><span class="Comment">op</span><span class="Comment">*/</span>string<span class="Delimiter">,</span> string> <span class="Special"><a href='010---vm.cc.html#L380'>Name_f3</a></span><span class="Delimiter">;</span>
<span id="L381" class="LineNr">381 </span>map<<span class="Comment">/*</span><span class="Comment">op</span><span class="Comment">*/</span>string<span class="Delimiter">,</span> string> <span class="Special"><a href='010---vm.cc.html#L381'>Name_f3_0f</a></span><span class="Delimiter">;</span>
<span id="L382" class="LineNr">382 </span><span class="Delimiter">:(before "End One-time Setup")</span>
<span id="L383" class="LineNr">383 </span><a href='010---vm.cc.html#L385'>init_op_names</a><span class="Delimiter">();</span>
<span id="L384" class="LineNr">384 </span><span class="Delimiter">:(code)</span>
<span id="L385" class="LineNr">385 </span><span class="Normal">void</span> <a href='010---vm.cc.html#L385'>init_op_names</a><span class="Delimiter">()</span> <span class="Delimiter">{</span>
<span id="L386" class="LineNr">386 </span> <a href='001help.cc.html#L252'>put</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">"f4"</span><span class="Delimiter">,</span> <span class="Constant">"halt (hlt)"</span><span class="Delimiter">);</span>
<span id="L387" class="LineNr">387 </span> <span class="Comment">// End Initialize Op Names</span>
<span id="L388" class="LineNr">388 </span><span class="Delimiter">}</span>
<span id="L389" class="LineNr">389 </span>
<span id="L390" class="LineNr">390 </span><span class="Delimiter">:(before "End <a href='001help.cc.html#L53'>Help</a> Special-cases(key)")</span>
<span id="L391" class="LineNr">391 </span><span class="Normal">if</span> <span class="Delimiter">(</span>key == <span class="Constant">"opcodes"</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L392" class="LineNr">392 </span> cerr << <span class="Constant">"Opcodes currently supported by SubX:\n"</span><span class="Delimiter">;</span>
<span id="L393" class="LineNr">393 </span> <span class="Normal">for</span> <span class="Delimiter">(</span>map<string<span class="Delimiter">,</span> string>::iterator p = <span class="Special"><a href='010---vm.cc.html#L378'>Name</a></span><span class="Delimiter">.</span>begin<span class="Delimiter">();</span> p != <span class="Special"><a href='010---vm.cc.html#L378'>Name</a></span><span class="Delimiter">.</span>end<span class="Delimiter">();</span> ++p<span class="Delimiter">)</span>
<span id="L394" class="LineNr">394 </span> cerr << <span class="Constant">" "</span> << p<span class="Delimiter">-></span>first << <span class="Constant">": "</span> << p<span class="Delimiter">-></span>second << <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
<span id="L395" class="LineNr">395 </span> <span class="Normal">for</span> <span class="Delimiter">(</span>map<string<span class="Delimiter">,</span> string>::iterator p = <span class="Special"><a href='010---vm.cc.html#L379'>Name_0f</a></span><span class="Delimiter">.</span>begin<span class="Delimiter">();</span> p != <span class="Special"><a href='010---vm.cc.html#L379'>Name_0f</a></span><span class="Delimiter">.</span>end<span class="Delimiter">();</span> ++p<span class="Delimiter">)</span>
<span id="L396" class="LineNr">396 </span> cerr << <span class="Constant">" 0f "</span> << p<span class="Delimiter">-></span>first << <span class="Constant">": "</span> << p<span class="Delimiter">-></span>second << <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
<span id="L397" class="LineNr">397 </span> <span class="Normal">for</span> <span class="Delimiter">(</span>map<string<span class="Delimiter">,</span> string>::iterator p = <span class="Special"><a href='010---vm.cc.html#L380'>Name_f3</a></span><span class="Delimiter">.</span>begin<span class="Delimiter">();</span> p != <span class="Special"><a href='010---vm.cc.html#L380'>Name_f3</a></span><span class="Delimiter">.</span>end<span class="Delimiter">();</span> ++p<span class="Delimiter">)</span>
<span id="L398" class="LineNr">398 </span> cerr << <span class="Constant">" f3 "</span> << p<span class="Delimiter">-></span>first << <span class="Constant">": "</span> << p<span class="Delimiter">-></span>second << <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
<span id="L399" class="LineNr">399 </span> <span class="Normal">for</span> <span class="Delimiter">(</span>map<string<span class="Delimiter">,</span> string>::iterator p = <span class="Special"><a href='010---vm.cc.html#L381'>Name_f3_0f</a></span><span class="Delimiter">.</span>begin<span class="Delimiter">();</span> p != <span class="Special"><a href='010---vm.cc.html#L381'>Name_f3_0f</a></span><span class="Delimiter">.</span>end<span class="Delimiter">();</span> ++p<span class="Delimiter">)</span>
<span id="L400" class="LineNr">400 </span> cerr << <span class="Constant">" f3 0f "</span> << p<span class="Delimiter">-></span>first << <span class="Constant">": "</span> << p<span class="Delimiter">-></span>second << <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
<span id="L401" class="LineNr">401 </span> cerr << <span class="Constant">"Run `subx help instructions` for details on <a href='011run.cc.html#L114'>words</a> like 'r32' and 'disp8'.\n"</span>
<span id="L402" class="LineNr">402 </span> <span class="Constant">"For complete details on these instructions, consult the IA-32 manual (volume 2).\n"</span>
<span id="L403" class="LineNr">403 </span> <span class="Constant">"There's various versions of it online, such as <a href="https://c9x.me/x86">https://c9x.me/x86</a>.\n"</span>
<span id="L404" class="LineNr">404 </span> <span class="Constant">"The mnemonics in brackets will help you locate each instruction.\n"</span><span class="Delimiter">;</span>
<span id="L405" class="LineNr">405 </span> <span class="Identifier">return</span> <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L406" class="LineNr">406 </span><span class="Delimiter">}</span>
<span id="L407" class="LineNr">407 </span><span class="Delimiter">:(before "End <a href='001help.cc.html#L53'>Help</a> Contents")</span>
<span id="L408" class="LineNr">408 </span>cerr << <span class="Constant">" opcodes\n"</span><span class="Delimiter">;</span>
<span id="L409" class="LineNr">409 </span>
<span id="L410" class="LineNr">410 </span><span class="Delimiter">:(before "End Includes")</span>
<span id="L411" class="LineNr">411 </span><span class="Comment">#include <iomanip></span>
<span id="L412" class="LineNr">412 </span><span class="Comment">#define HEXBYTE std::hex << std::setw(2) << std::setfill('0')</span>
<span id="L413" class="LineNr">413 </span><span class="Comment">#define HEXWORD std::hex << std::setw(8) << std::setfill('0')</span>
<span id="L414" class="LineNr">414 </span><span class="Comment">// ugly that iostream doesn't print uint8_t as an integer</span>
<span id="L415" class="LineNr">415 </span><span class="Comment">#define NUM(X) static_cast<int>(X)</span>
<span id="L416" class="LineNr">416 </span><span class="Comment">#include <stdint.h></span>
</pre>
</body>
</html>
<!-- vim: set foldmethod=manual : -->
|