-
Notifications
You must be signed in to change notification settings - Fork 2
Expand file tree
/
Copy pathctrl_reg_emu.c
More file actions
607 lines (381 loc) · 10.5 KB
/
ctrl_reg_emu.c
File metadata and controls
607 lines (381 loc) · 10.5 KB
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
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
#include "ctrl_reg_emu.h"
#include "cpuseg_emu.h"
#include "system.h"
#include "CPUemu.h"
#include "gdebug.h"
#include "gdt.h"
#include "page_emu.h"
#define DEFAULT_CR0_VALUE 0x00000010
#define DEFAULT_CR1_VALUE 0x00000000
#define DEFAULT_CR2_VALUE 0x00000000
#define DEFAULT_CR3_VALUE 0x00000000
#define DEFAULT_CR4_VALUE 0x00000000
static void refresh_cr_reg(DWORD reg_num);
static void write_cr0(DWORD value, vm_emu_datas *status);
static void write_cr1(DWORD value, vm_emu_datas *status);
static void write_cr2(DWORD value, vm_emu_datas *status);
static void write_cr3(DWORD value, vm_emu_datas *stauts);
static void write_cr4(DWORD value, vm_emu_datas *status);
static DWORD read_cr0();
static DWORD read_cr1();
static DWORD read_cr2();
static DWORD read_cr3();
static DWORD read_cr4();
/* cr0 */
static void alt_PE_flag(vm_emu_datas*);
static void alt_MP_flag(vm_emu_datas*);
static void alt_EM_flag(vm_emu_datas*);
static void alt_TS_flag(vm_emu_datas*);
static void alt_ET_flag(vm_emu_datas*);
static void alt_NE_flag(vm_emu_datas*);
static void alt_WP_flag(vm_emu_datas*);
static void alt_AM_flag(vm_emu_datas*);
static void alt_NW_flag(vm_emu_datas*);
static void alt_CD_flag(vm_emu_datas*);
static void alt_PG_flag(vm_emu_datas*);
/* cr3 */
static void alt_PWT_flag(vm_emu_datas*);
static void alt_PCD_flag(vm_emu_datas*);
/* cr4 */
static void alt_VME_flag(vm_emu_datas*);
static void alt_PVI_flag(vm_emu_datas*);
static void alt_TSD_flag(vm_emu_datas*);
static void alt_DE_flag(vm_emu_datas*);
static void alt_PSE_flag(vm_emu_datas*);
static void alt_PAE_flag(vm_emu_datas*);
static void alt_MCE_flag(vm_emu_datas*);
static void alt_PGE_flag(vm_emu_datas*);
static void alt_PCE_flag(vm_emu_datas*);
static void alt_OSFXSR_flag(vm_emu_datas*);
static void alt_OSXMMEXCPT_flag(vm_emu_datas*);
/* PEフラグ時に使う */
static void make_tmp_16bit_seg(vm_emu_datas* status);
static DWORD emu_cr_reg[5] = {0};
static DWORD (*func_table[])(vm_emu_datas*) = {
&ret_eax,
&ret_ecx,
&ret_edx,
&ret_ebx,
NULL,
&ret_ebp,
&ret_esi,
&ret_edi
};
static int bit16[] = {6, 7, 5, 3};
static void (*cr0_func_table[])(vm_emu_datas*) = {
&alt_PE_flag,
&alt_MP_flag,
&alt_EM_flag,
&alt_TS_flag,
&alt_ET_flag,
&alt_NE_flag,
&alt_WP_flag,
&alt_AM_flag,
&alt_NW_flag,
&alt_CD_flag,
&alt_PG_flag
};
static void (*cr4_func_table[])(vm_emu_datas*) = {
&alt_VME_flag,
&alt_PVI_flag,
&alt_TSD_flag,
&alt_DE_flag,
&alt_PSE_flag,
&alt_PAE_flag,
&alt_MCE_flag,
&alt_PGE_flag,
&alt_PCE_flag,
&alt_OSFXSR_flag,
&alt_OSXMMEXCPT_flag
};
void cpu_init_ctrlreg_emu(){
emu_cr_reg[0] = DEFAULT_CR0_VALUE;
emu_cr_reg[1] = DEFAULT_CR1_VALUE;
emu_cr_reg[2] = DEFAULT_CR2_VALUE;
emu_cr_reg[3] = DEFAULT_CR3_VALUE;
emu_cr_reg[4] = DEFAULT_CR4_VALUE;
}
static void write_cr0(DWORD value, vm_emu_datas *status){
DWORD pattern = emu_cr_reg[0] ^ value;
DWORD tmp;
DWORD i = 0;
emu_cr_reg[0] = value;
if(pattern & PE_FLAG){
cr0_func_table[0](status);
}else if(pattern & MP_FLAG){
cr0_func_table[1](status);
}else if(pattern & EM_FLAG){
cr0_func_table[2](status);
}else if(pattern & TS_FLAG){
cr0_func_table[3](status);
}else if(pattern & ET_FLAG){
cr0_func_table[4](status);
}else if(pattern & NE_FLAG){
cr0_func_table[5](status);
}else if(pattern & WP_FLAG){
cr0_func_table[6](status);
}else if(pattern & AM_FLAG){
cr0_func_table[7](status);
}else if(pattern & NW_FLAG){
cr0_func_table[8](status);
}else if(pattern & CD_FLAG){
cr0_func_table[9](status);
}else if(pattern & PG_FLAG){
cr0_func_table[10](status);
}
}
static void write_cr1(DWORD value, vm_emu_datas *status){
emu_cr_reg[1] = value;
asm volatile (
"movl %%eax, %%cr1"
:: "a"(value));
}
static void write_cr2(DWORD value, vm_emu_datas *status){
emu_cr_reg[2] = value;
refresh_cr_reg(2);
}
static void write_cr3(DWORD value, vm_emu_datas *status){
DWORD tmp = emu_cr_reg[3] ^ value;
if(tmp & 0x8){
alt_PWT_flag(status);
}else if(tmp & 0x10){
alt_PCD_flag(status);
}
cpu_emu_flush_tlb(value & 0xfffff000);
emu_cr_reg[3] = value;
}
static void write_cr4(DWORD value, vm_emu_datas *status){
DWORD pattern = emu_cr_reg[4] ^ value;
DWORD i = 0;
DWORD tmp;
do{
tmp = pattern >> i;
if(tmp & 0x1){
cr4_func_table[i](status);
}
++i;
}while(tmp);
emu_cr_reg[4] = value;
}
static DWORD read_cr0(){
return emu_cr_reg[0];
}
static DWORD read_cr1(){
return emu_cr_reg[1];
}
static DWORD read_cr2(){
return emu_cr_reg[2];
}
static DWORD read_cr3(){
return emu_cr_reg[3];
}
static DWORD read_cr4(){
return emu_cr_reg[4];
}
static void refresh_cr_reg(DWORD reg_num){
switch(reg_num){
case 0:
break;
case 1:
break;
case 2:
break;
case 3:
break;
case 4:
break;
}
return;
}
/* 0x22 */
void emu_mov_crn_reg(vm_emu_datas *status){
BYTE modr_m = get_userseg_byte(status->code_addr);
DWORD tmp = modr_m & 0xf;
DWORD value;
switch(modr_m >> 4){
case 0xC:
if(tmp >= 8){
value = func_table[tmp - 8](status);
}else{
value = func_table[tmp](status);
//_sys_printf("write! %x\n", value);
write_cr0(value, status);
}
break;
case 0xD:
if(tmp >= 8){
value = func_table[tmp - 8](status);
write_cr3(value, status);
}else{
value = func_table[tmp](status);
write_cr2(value, status);
}
break;
case 0xE:
value = func_table[tmp](status);
write_cr4(value, status);
break;
}
}
/* 0x20 */
void emu_mov_reg_crn(vm_emu_datas *status){
BYTE modr_m = get_userseg_byte(status->code_addr);
DWORD tmp = modr_m & 0xf;
DWORD *reg_table[] = {
&status->regs->eax,
&status->regs->ecx,
&status->regs->edx,
&status->regs->ebx,
NULL,
&status->regs->ebp,
&status->regs->esi,
&status->regs->edi
};
switch(modr_m >> 4){
case 0xC:
if(tmp >= 8){
*(reg_table[tmp - 8]) = read_cr1();
}else{
*(reg_table[tmp]) = read_cr0();
}
break;
case 0xD:
if(tmp >= 8){
*(reg_table[tmp - 8]) = read_cr3();
}else{
*(reg_table[tmp]) = read_cr2();
}
break;
case 0xE:
*(reg_table[tmp]) = read_cr4();
break;
}
}
void emu_lmsw(BYTE modr_m, vm_emu_datas *status){
DWORD cr0_value = read_cr0() & 0xffff0000;
switch((modr_m >> 4) & 0xf){
case 0xf:
cr0_value |= func_table[modr_m & 0xf](status) & 0xffff;
write_cr0(cr0_value, status);
break;
case 0x3:
cr0_value |= func_table[bit16[(modr_m & 0xf) - 4]](status) & 0xffff;
write_cr0(cr0_value, status);
break;
case 0x7:
cr0_value |= func_table[bit16[(modr_m & 0xf) - 4]](status) & 0xffff;
write_cr0(cr0_value, status);
get_userseg_byte(status->code_addr);
break;
}
}
static void alt_PE_flag(vm_emu_datas *status){
if(get_vm_mode_status()){
/* protect_mode -> real_mode */
/* 今のところは実装しない */
}else{
/* real_mode -> protect_mode */
make_tmp_16bit_seg(status);
status->stack.sys_stack->cs = (VM_GDT_ENTRY_V_CS << 3) | 0x3;
status->stack.sys_stack->ss = (VM_GDT_ENTRY_V_SS << 3) | 0x3;
status->regs->ds = (VM_GDT_ENTRY_V_DS << 3) | 0x3;
/* vm-flagを解除 */
status->stack.sys_stack->eflags &= 0xfffd7fd7;
}
/* protect_mode or real_mode*/
//change_vm_mode_status();
/*
_sys_printf("\nchange mode: %d\n", get_vm_mode_status());
_sys_printf("cs=%x ss=%x ds=%x\n", status->stack.sys_stack->cs, status->stack.sys_stack->ss, status->regs->ds);
*/
}
static void alt_MP_flag(vm_emu_datas *status){
}
static void alt_EM_flag(vm_emu_datas *status){
}
static void alt_TS_flag(vm_emu_datas *status){
}
static void alt_ET_flag(vm_emu_datas *status){
}
static void alt_NE_flag(vm_emu_datas *status){
}
static void alt_WP_flag(vm_emu_datas *status){
}
static void alt_AM_flag(vm_emu_datas *status){
}
static void alt_NW_flag(vm_emu_datas *status){
}
static void alt_CD_flag(vm_emu_datas *status){
}
static void alt_PG_flag(vm_emu_datas *status){
}
/* cr3 */
static void alt_PWT_flag(vm_emu_datas *status){
}
static void alt_PCD_flag(vm_emu_datas *status){
}
/* cr4 */
static void alt_VME_flag(vm_emu_datas *status){
}
static void alt_PVI_flag(vm_emu_datas *status){
}
static void alt_TSD_flag(vm_emu_datas *status){
}
static void alt_DE_flag(vm_emu_datas *status){
}
static void alt_PSE_flag(vm_emu_datas *status){
DWORD value = read_cr3();
change_PSE_mode();
cpu_emu_flush_tlb(value & 0xfffff000);
}
static void alt_PAE_flag(vm_emu_datas *status){
}
static void alt_MCE_flag(vm_emu_datas *status){
}
static void alt_PGE_flag(vm_emu_datas *status){
}
static void alt_PCE_flag(vm_emu_datas *status){
}
static void alt_OSFXSR_flag(vm_emu_datas *status){
}
static void alt_OSXMMEXCPT_flag(vm_emu_datas *status){
}
/* real_mode only */
static void make_tmp_16bit_seg(vm_emu_datas* status){
segment_entry entry;
DWORD base_addr;
DWORD limit;
//最低限ds, csだけね
base_addr = status->stack.real_mode->cs << 4;
limit = 0xfffff;
/* dplを1に設定してみるか... */
/* 16bit csディスクリプタ */
make_gdt_value(base_addr, limit, GDT_SEG_TYPE_5 | GDT_TYPE_P_FLAG | GDT_TYPE_S_FLAG,
0x0, 3, &entry);
write_raw_vm_segment(VM_GDT_ENTRY_V_CS, &entry);
/* ds */
base_addr = status->stack.real_mode->ds << 4;
limit = 0xfffff;
/* 16bit dsディスクリプタ */
make_gdt_value(base_addr, limit, GDT_SEG_TYPE_1 | GDT_TYPE_P_FLAG | GDT_TYPE_S_FLAG,
0x0, 3, &entry);
write_raw_vm_segment(VM_GDT_ENTRY_V_DS, &entry);
/* ss */
base_addr = status->stack.real_mode->ss << 4;
limit = 0xfffff;
/* 16bit ssディスクリプタ */
make_gdt_value(base_addr, limit, GDT_SEG_TYPE_3 | GDT_TYPE_P_FLAG | GDT_TYPE_S_FLAG,
0x0, 3, &entry);
write_raw_vm_segment(VM_GDT_ENTRY_V_SS, &entry);
//gs, fsはとりあえず保留
}
void vm_set_flag_crn(int reg_num, int bit_num){
DWORD value = 0x1;
value <<= bit_num;
emu_cr_reg[reg_num] |= value;
}
void vm_clear_flag_crn(int reg_num, int bit_num){
DWORD value = 0x1;
value <<= bit_num;
emu_cr_reg[reg_num] &= ~value;
}