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1 /*
2 * x86 CPU test
3 *
4 * Copyright (c) 2003 Fabrice Bellard
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 */
20 #define _GNU_SOURCE
21 #include <stdlib.h>
22 #include <stdio.h>
23 #include <string.h>
24 #include <inttypes.h>
25 #include <math.h>
26 #include <signal.h>
27 #include <setjmp.h>
28 #include <errno.h>
29 #include <sys/ucontext.h>
30 #include <sys/mman.h>
31 #include <asm/vm86.h>
32
33 #define TEST_CMOV 0
34 #define TEST_FCOMI 0
35 //#define LINUX_VM86_IOPL_FIX
36 //#define TEST_P4_FLAGS
37
38 #define xglue(x, y) x ## y
39 #define glue(x, y) xglue(x, y)
40 #define stringify(s) tostring(s)
41 #define tostring(s) #s
42
43 #define CC_C 0x0001
44 #define CC_P 0x0004
45 #define CC_A 0x0010
46 #define CC_Z 0x0040
47 #define CC_S 0x0080
48 #define CC_O 0x0800
49
50 #define __init_call __attribute__ ((unused,__section__ (".initcall.init")))
51
52 static void *call_start __init_call = NULL;
53
54 #define CC_MASK (CC_C | CC_P | CC_Z | CC_S | CC_O | CC_A)
55
56 #define OP add
57 #include "test-i386.h"
58
59 #define OP sub
60 #include "test-i386.h"
61
62 #define OP xor
63 #include "test-i386.h"
64
65 #define OP and
66 #include "test-i386.h"
67
68 #define OP or
69 #include "test-i386.h"
70
71 #define OP cmp
72 #include "test-i386.h"
73
74 #define OP adc
75 #define OP_CC
76 #include "test-i386.h"
77
78 #define OP sbb
79 #define OP_CC
80 #include "test-i386.h"
81
82 #define OP inc
83 #define OP_CC
84 #define OP1
85 #include "test-i386.h"
86
87 #define OP dec
88 #define OP_CC
89 #define OP1
90 #include "test-i386.h"
91
92 #define OP neg
93 #define OP_CC
94 #define OP1
95 #include "test-i386.h"
96
97 #define OP not
98 #define OP_CC
99 #define OP1
100 #include "test-i386.h"
101
102 #undef CC_MASK
103 #define CC_MASK (CC_C | CC_P | CC_Z | CC_S | CC_O)
104
105 #define OP shl
106 #include "test-i386-shift.h"
107
108 #define OP shr
109 #include "test-i386-shift.h"
110
111 #define OP sar
112 #include "test-i386-shift.h"
113
114 #define OP rol
115 #include "test-i386-shift.h"
116
117 #define OP ror
118 #include "test-i386-shift.h"
119
120 #define OP rcr
121 #define OP_CC
122 #include "test-i386-shift.h"
123
124 #define OP rcl
125 #define OP_CC
126 #include "test-i386-shift.h"
127
128 #define OP shld
129 #define OP_SHIFTD
130 #define OP_NOBYTE
131 #include "test-i386-shift.h"
132
133 #define OP shrd
134 #define OP_SHIFTD
135 #define OP_NOBYTE
136 #include "test-i386-shift.h"
137
138 /* XXX: should be more precise ? */
139 #undef CC_MASK
140 #define CC_MASK (CC_C)
141
142 #define OP bt
143 #define OP_NOBYTE
144 #include "test-i386-shift.h"
145
146 #define OP bts
147 #define OP_NOBYTE
148 #include "test-i386-shift.h"
149
150 #define OP btr
151 #define OP_NOBYTE
152 #include "test-i386-shift.h"
153
154 #define OP btc
155 #define OP_NOBYTE
156 #include "test-i386-shift.h"
157
158 /* lea test (modrm support) */
159 #define TEST_LEA(STR)\
160 {\
161 asm("leal " STR ", %0"\
162 : "=r" (res)\
163 : "a" (eax), "b" (ebx), "c" (ecx), "d" (edx), "S" (esi), "D" (edi));\
164 printf("lea %s = %08x\n", STR, res);\
165 }
166
167 #define TEST_LEA16(STR)\
168 {\
169 asm(".code16 ; .byte 0x67 ; leal " STR ", %0 ; .code32"\
170 : "=wq" (res)\
171 : "a" (eax), "b" (ebx), "c" (ecx), "d" (edx), "S" (esi), "D" (edi));\
172 printf("lea %s = %08x\n", STR, res);\
173 }
174
175
176 void test_lea(void)
177 {
178 int eax, ebx, ecx, edx, esi, edi, res;
179 eax = 0x0001;
180 ebx = 0x0002;
181 ecx = 0x0004;
182 edx = 0x0008;
183 esi = 0x0010;
184 edi = 0x0020;
185
186 TEST_LEA("0x4000");
187
188 TEST_LEA("(%%eax)");
189 TEST_LEA("(%%ebx)");
190 TEST_LEA("(%%ecx)");
191 TEST_LEA("(%%edx)");
192 TEST_LEA("(%%esi)");
193 TEST_LEA("(%%edi)");
194
195 TEST_LEA("0x40(%%eax)");
196 TEST_LEA("0x40(%%ebx)");
197 TEST_LEA("0x40(%%ecx)");
198 TEST_LEA("0x40(%%edx)");
199 TEST_LEA("0x40(%%esi)");
200 TEST_LEA("0x40(%%edi)");
201
202 TEST_LEA("0x4000(%%eax)");
203 TEST_LEA("0x4000(%%ebx)");
204 TEST_LEA("0x4000(%%ecx)");
205 TEST_LEA("0x4000(%%edx)");
206 TEST_LEA("0x4000(%%esi)");
207 TEST_LEA("0x4000(%%edi)");
208
209 TEST_LEA("(%%eax, %%ecx)");
210 TEST_LEA("(%%ebx, %%edx)");
211 TEST_LEA("(%%ecx, %%ecx)");
212 TEST_LEA("(%%edx, %%ecx)");
213 TEST_LEA("(%%esi, %%ecx)");
214 TEST_LEA("(%%edi, %%ecx)");
215
216 TEST_LEA("0x40(%%eax, %%ecx)");
217 TEST_LEA("0x4000(%%ebx, %%edx)");
218
219 TEST_LEA("(%%ecx, %%ecx, 2)");
220 TEST_LEA("(%%edx, %%ecx, 4)");
221 TEST_LEA("(%%esi, %%ecx, 8)");
222
223 TEST_LEA("(,%%eax, 2)");
224 TEST_LEA("(,%%ebx, 4)");
225 TEST_LEA("(,%%ecx, 8)");
226
227 TEST_LEA("0x40(,%%eax, 2)");
228 TEST_LEA("0x40(,%%ebx, 4)");
229 TEST_LEA("0x40(,%%ecx, 8)");
230
231
232 TEST_LEA("-10(%%ecx, %%ecx, 2)");
233 TEST_LEA("-10(%%edx, %%ecx, 4)");
234 TEST_LEA("-10(%%esi, %%ecx, 8)");
235
236 TEST_LEA("0x4000(%%ecx, %%ecx, 2)");
237 TEST_LEA("0x4000(%%edx, %%ecx, 4)");
238 TEST_LEA("0x4000(%%esi, %%ecx, 8)");
239
240 /* limited 16 bit addressing test */
241 TEST_LEA16("0x4000");
242 TEST_LEA16("(%%bx)");
243 TEST_LEA16("(%%si)");
244 TEST_LEA16("(%%di)");
245 TEST_LEA16("0x40(%%bx)");
246 TEST_LEA16("0x40(%%si)");
247 TEST_LEA16("0x40(%%di)");
248 TEST_LEA16("0x4000(%%bx)");
249 TEST_LEA16("0x4000(%%si)");
250 TEST_LEA16("(%%bx,%%si)");
251 TEST_LEA16("(%%bx,%%di)");
252 TEST_LEA16("0x40(%%bx,%%si)");
253 TEST_LEA16("0x40(%%bx,%%di)");
254 TEST_LEA16("0x4000(%%bx,%%si)");
255 TEST_LEA16("0x4000(%%bx,%%di)");
256 }
257
258 #define TEST_JCC(JCC, v1, v2)\
259 {\
260 int res;\
261 asm("movl $1, %0\n\t"\
262 "cmpl %2, %1\n\t"\
263 "j" JCC " 1f\n\t"\
264 "movl $0, %0\n\t"\
265 "1:\n\t"\
266 : "=r" (res)\
267 : "r" (v1), "r" (v2));\
268 printf("%-10s %d\n", "j" JCC, res);\
269 \
270 asm("movl $0, %0\n\t"\
271 "cmpl %2, %1\n\t"\
272 "set" JCC " %b0\n\t"\
273 : "=r" (res)\
274 : "r" (v1), "r" (v2));\
275 printf("%-10s %d\n", "set" JCC, res);\
276 if (TEST_CMOV) {\
277 asm("movl $0x12345678, %0\n\t"\
278 "cmpl %2, %1\n\t"\
279 "cmov" JCC "l %3, %0\n\t"\
280 : "=r" (res)\
281 : "r" (v1), "r" (v2), "m" (1));\
282 printf("%-10s R=0x%08x\n", "cmov" JCC "l", res);\
283 asm("movl $0x12345678, %0\n\t"\
284 "cmpl %2, %1\n\t"\
285 "cmov" JCC "w %w3, %w0\n\t"\
286 : "=r" (res)\
287 : "r" (v1), "r" (v2), "r" (1));\
288 printf("%-10s R=0x%08x\n", "cmov" JCC "w", res);\
289 } \
290 }
291
292 /* various jump tests */
293 void test_jcc(void)
294 {
295 TEST_JCC("ne", 1, 1);
296 TEST_JCC("ne", 1, 0);
297
298 TEST_JCC("e", 1, 1);
299 TEST_JCC("e", 1, 0);
300
301 TEST_JCC("l", 1, 1);
302 TEST_JCC("l", 1, 0);
303 TEST_JCC("l", 1, -1);
304
305 TEST_JCC("le", 1, 1);
306 TEST_JCC("le", 1, 0);
307 TEST_JCC("le", 1, -1);
308
309 TEST_JCC("ge", 1, 1);
310 TEST_JCC("ge", 1, 0);
311 TEST_JCC("ge", -1, 1);
312
313 TEST_JCC("g", 1, 1);
314 TEST_JCC("g", 1, 0);
315 TEST_JCC("g", 1, -1);
316
317 TEST_JCC("b", 1, 1);
318 TEST_JCC("b", 1, 0);
319 TEST_JCC("b", 1, -1);
320
321 TEST_JCC("be", 1, 1);
322 TEST_JCC("be", 1, 0);
323 TEST_JCC("be", 1, -1);
324
325 TEST_JCC("ae", 1, 1);
326 TEST_JCC("ae", 1, 0);
327 TEST_JCC("ae", 1, -1);
328
329 TEST_JCC("a", 1, 1);
330 TEST_JCC("a", 1, 0);
331 TEST_JCC("a", 1, -1);
332
333
334 TEST_JCC("p", 1, 1);
335 TEST_JCC("p", 1, 0);
336
337 TEST_JCC("np", 1, 1);
338 TEST_JCC("np", 1, 0);
339
340 TEST_JCC("o", 0x7fffffff, 0);
341 TEST_JCC("o", 0x7fffffff, -1);
342
343 TEST_JCC("no", 0x7fffffff, 0);
344 TEST_JCC("no", 0x7fffffff, -1);
345
346 TEST_JCC("s", 0, 1);
347 TEST_JCC("s", 0, -1);
348 TEST_JCC("s", 0, 0);
349
350 TEST_JCC("ns", 0, 1);
351 TEST_JCC("ns", 0, -1);
352 TEST_JCC("ns", 0, 0);
353 }
354
355 #undef CC_MASK
356 #ifdef TEST_P4_FLAGS
357 #define CC_MASK (CC_C | CC_P | CC_Z | CC_S | CC_O | CC_A)
358 #else
359 #define CC_MASK (CC_O | CC_C)
360 #endif
361
362 #define OP mul
363 #include "test-i386-muldiv.h"
364
365 #define OP imul
366 #include "test-i386-muldiv.h"
367
368 void test_imulw2(int op0, int op1)
369 {
370 int res, s1, s0, flags;
371 s0 = op0;
372 s1 = op1;
373 res = s0;
374 flags = 0;
375 asm ("push %4\n\t"
376 "popf\n\t"
377 "imulw %w2, %w0\n\t"
378 "pushf\n\t"
379 "popl %1\n\t"
380 : "=q" (res), "=g" (flags)
381 : "q" (s1), "0" (res), "1" (flags));
382 printf("%-10s A=%08x B=%08x R=%08x CC=%04x\n",
383 "imulw", s0, s1, res, flags & CC_MASK);
384 }
385
386 void test_imull2(int op0, int op1)
387 {
388 int res, s1, s0, flags;
389 s0 = op0;
390 s1 = op1;
391 res = s0;
392 flags = 0;
393 asm ("push %4\n\t"
394 "popf\n\t"
395 "imull %2, %0\n\t"
396 "pushf\n\t"
397 "popl %1\n\t"
398 : "=q" (res), "=g" (flags)
399 : "q" (s1), "0" (res), "1" (flags));
400 printf("%-10s A=%08x B=%08x R=%08x CC=%04x\n",
401 "imull", s0, s1, res, flags & CC_MASK);
402 }
403
404 #define TEST_IMUL_IM(size, size1, op0, op1)\
405 {\
406 int res, flags;\
407 flags = 0;\
408 res = 0;\
409 asm ("push %3\n\t"\
410 "popf\n\t"\
411 "imul" size " $" #op0 ", %" size1 "2, %" size1 "0\n\t" \
412 "pushf\n\t"\
413 "popl %1\n\t"\
414 : "=r" (res), "=g" (flags)\
415 : "r" (op1), "1" (flags), "0" (res));\
416 printf("%-10s A=%08x B=%08x R=%08x CC=%04x\n",\
417 "imul" size, op0, op1, res, flags & CC_MASK);\
418 }
419
420
421 #undef CC_MASK
422 #define CC_MASK (0)
423
424 #define OP div
425 #include "test-i386-muldiv.h"
426
427 #define OP idiv
428 #include "test-i386-muldiv.h"
429
430 void test_mul(void)
431 {
432 test_imulb(0x1234561d, 4);
433 test_imulb(3, -4);
434 test_imulb(0x80, 0x80);
435 test_imulb(0x10, 0x10);
436
437 test_imulw(0, 0x1234001d, 45);
438 test_imulw(0, 23, -45);
439 test_imulw(0, 0x8000, 0x8000);
440 test_imulw(0, 0x100, 0x100);
441
442 test_imull(0, 0x1234001d, 45);
443 test_imull(0, 23, -45);
444 test_imull(0, 0x80000000, 0x80000000);
445 test_imull(0, 0x10000, 0x10000);
446
447 test_mulb(0x1234561d, 4);
448 test_mulb(3, -4);
449 test_mulb(0x80, 0x80);
450 test_mulb(0x10, 0x10);
451
452 test_mulw(0, 0x1234001d, 45);
453 test_mulw(0, 23, -45);
454 test_mulw(0, 0x8000, 0x8000);
455 test_mulw(0, 0x100, 0x100);
456
457 test_mull(0, 0x1234001d, 45);
458 test_mull(0, 23, -45);
459 test_mull(0, 0x80000000, 0x80000000);
460 test_mull(0, 0x10000, 0x10000);
461
462 test_imulw2(0x1234001d, 45);
463 test_imulw2(23, -45);
464 test_imulw2(0x8000, 0x8000);
465 test_imulw2(0x100, 0x100);
466
467 test_imull2(0x1234001d, 45);
468 test_imull2(23, -45);
469 test_imull2(0x80000000, 0x80000000);
470 test_imull2(0x10000, 0x10000);
471
472 TEST_IMUL_IM("w", "w", 45, 0x1234);
473 TEST_IMUL_IM("w", "w", -45, 23);
474 TEST_IMUL_IM("w", "w", 0x8000, 0x80000000);
475 TEST_IMUL_IM("w", "w", 0x7fff, 0x1000);
476
477 TEST_IMUL_IM("l", "", 45, 0x1234);
478 TEST_IMUL_IM("l", "", -45, 23);
479 TEST_IMUL_IM("l", "", 0x8000, 0x80000000);
480 TEST_IMUL_IM("l", "", 0x7fff, 0x1000);
481
482 test_idivb(0x12341678, 0x127e);
483 test_idivb(0x43210123, -5);
484 test_idivb(0x12340004, -1);
485
486 test_idivw(0, 0x12345678, 12347);
487 test_idivw(0, -23223, -45);
488 test_idivw(0, 0x12348000, -1);
489 test_idivw(0x12343, 0x12345678, 0x81238567);
490
491 test_idivl(0, 0x12345678, 12347);
492 test_idivl(0, -233223, -45);
493 test_idivl(0, 0x80000000, -1);
494 test_idivl(0x12343, 0x12345678, 0x81234567);
495
496 test_divb(0x12341678, 0x127e);
497 test_divb(0x43210123, -5);
498 test_divb(0x12340004, -1);
499
500 test_divw(0, 0x12345678, 12347);
501 test_divw(0, -23223, -45);
502 test_divw(0, 0x12348000, -1);
503 test_divw(0x12343, 0x12345678, 0x81238567);
504
505 test_divl(0, 0x12345678, 12347);
506 test_divl(0, -233223, -45);
507 test_divl(0, 0x80000000, -1);
508 test_divl(0x12343, 0x12345678, 0x81234567);
509 }
510
511 #define TEST_BSX(op, size, op0)\
512 {\
513 int res, val, resz;\
514 val = op0;\
515 asm("xorl %1, %1 ; " #op " %" size "2, %" size "0 ; setz %b1" \
516 : "=r" (res), "=q" (resz)\
517 : "g" (val));\
518 printf("%-10s A=%08x R=%08x %d\n", #op, val, resz ? 0 : res, resz);\
519 }
520
521 void test_bsx(void)
522 {
523 TEST_BSX(bsrw, "w", 0);
524 TEST_BSX(bsrw, "w", 0x12340128);
525 TEST_BSX(bsrl, "", 0);
526 TEST_BSX(bsrl, "", 0x00340128);
527 TEST_BSX(bsfw, "w", 0);
528 TEST_BSX(bsfw, "w", 0x12340128);
529 TEST_BSX(bsfl, "", 0);
530 TEST_BSX(bsfl, "", 0x00340128);
531 }
532
533 /**********************************************/
534
535 void test_fops(double a, double b)
536 {
537 printf("a=%f b=%f a+b=%f\n", a, b, a + b);
538 printf("a=%f b=%f a-b=%f\n", a, b, a - b);
539 printf("a=%f b=%f a*b=%f\n", a, b, a * b);
540 printf("a=%f b=%f a/b=%f\n", a, b, a / b);
541 printf("a=%f b=%f fmod(a, b)=%f\n", a, b, fmod(a, b));
542 printf("a=%f sqrt(a)=%f\n", a, sqrt(a));
543 printf("a=%f sin(a)=%f\n", a, sin(a));
544 printf("a=%f cos(a)=%f\n", a, cos(a));
545 printf("a=%f tan(a)=%f\n", a, tan(a));
546 printf("a=%f log(a)=%f\n", a, log(a));
547 printf("a=%f exp(a)=%f\n", a, exp(a));
548 printf("a=%f b=%f atan2(a, b)=%f\n", a, b, atan2(a, b));
549 /* just to test some op combining */
550 printf("a=%f asin(sin(a))=%f\n", a, asin(sin(a)));
551 printf("a=%f acos(cos(a))=%f\n", a, acos(cos(a)));
552 printf("a=%f atan(tan(a))=%f\n", a, atan(tan(a)));
553
554 }
555
556 void test_fcmp(double a, double b)
557 {
558 printf("(%f<%f)=%d\n",
559 a, b, a < b);
560 printf("(%f<=%f)=%d\n",
561 a, b, a <= b);
562 printf("(%f==%f)=%d\n",
563 a, b, a == b);
564 printf("(%f>%f)=%d\n",
565 a, b, a > b);
566 printf("(%f<=%f)=%d\n",
567 a, b, a >= b);
568 if (TEST_FCOMI) {
569 unsigned int eflags;
570 /* test f(u)comi instruction */
571 asm("fcomi %2, %1\n"
572 "pushf\n"
573 "pop %0\n"
574 : "=r" (eflags)
575 : "t" (a), "u" (b));
576 printf("fcomi(%f %f)=%08x\n", a, b, eflags & (CC_Z | CC_P | CC_C));
577 }
578 }
579
580 void test_fcvt(double a)
581 {
582 float fa;
583 long double la;
584 int16_t fpuc;
585 int i;
586 int64_t lla;
587 int ia;
588 int16_t wa;
589 double ra;
590
591 fa = a;
592 la = a;
593 printf("(float)%f = %f\n", a, fa);
594 printf("(long double)%f = %Lf\n", a, la);
595 printf("a=%016Lx\n", *(long long *)&a);
596 printf("la=%016Lx %04x\n", *(long long *)&la,
597 *(unsigned short *)((char *)(&la) + 8));
598
599 /* test all roundings */
600 asm volatile ("fstcw %0" : "=m" (fpuc));
601 for(i=0;i<4;i++) {
602 asm volatile ("fldcw %0" : : "m" ((fpuc & ~0x0c00) | (i << 10)));
603 asm volatile ("fist %0" : "=m" (wa) : "t" (a));
604 asm volatile ("fistl %0" : "=m" (ia) : "t" (a));
605 asm volatile ("fistpll %0" : "=m" (lla) : "t" (a) : "st");
606 asm volatile ("frndint ; fstl %0" : "=m" (ra) : "t" (a));
607 asm volatile ("fldcw %0" : : "m" (fpuc));
608 printf("(short)a = %d\n", wa);
609 printf("(int)a = %d\n", ia);
610 printf("(int64_t)a = %Ld\n", lla);
611 printf("rint(a) = %f\n", ra);
612 }
613 }
614
615 #define TEST(N) \
616 asm("fld" #N : "=t" (a)); \
617 printf("fld" #N "= %f\n", a);
618
619 void test_fconst(void)
620 {
621 double a;
622 TEST(1);
623 TEST(l2t);
624 TEST(l2e);
625 TEST(pi);
626 TEST(lg2);
627 TEST(ln2);
628 TEST(z);
629 }
630
631 void test_fbcd(double a)
632 {
633 unsigned short bcd[5];
634 double b;
635
636 asm("fbstp %0" : "=m" (bcd[0]) : "t" (a) : "st");
637 asm("fbld %1" : "=t" (b) : "m" (bcd[0]));
638 printf("a=%f bcd=%04x%04x%04x%04x%04x b=%f\n",
639 a, bcd[4], bcd[3], bcd[2], bcd[1], bcd[0], b);
640 }
641
642 #define TEST_ENV(env, save, restore)\
643 {\
644 memset((env), 0xaa, sizeof(*(env)));\
645 for(i=0;i<5;i++)\
646 asm volatile ("fldl %0" : : "m" (dtab[i]));\
647 asm(save " %0\n" : : "m" (*(env)));\
648 asm(restore " %0\n": : "m" (*(env)));\
649 for(i=0;i<5;i++)\
650 asm volatile ("fstpl %0" : "=m" (rtab[i]));\
651 for(i=0;i<5;i++)\
652 printf("res[%d]=%f\n", i, rtab[i]);\
653 printf("fpuc=%04x fpus=%04x fptag=%04x\n",\
654 (env)->fpuc,\
655 (env)->fpus & 0xff00,\
656 (env)->fptag);\
657 }
658
659 void test_fenv(void)
660 {
661 struct __attribute__((packed)) {
662 uint16_t fpuc;
663 uint16_t dummy1;
664 uint16_t fpus;
665 uint16_t dummy2;
666 uint16_t fptag;
667 uint16_t dummy3;
668 uint32_t ignored[4];
669 long double fpregs[8];
670 } float_env32;
671 struct __attribute__((packed)) {
672 uint16_t fpuc;
673 uint16_t fpus;
674 uint16_t fptag;
675 uint16_t ignored[4];
676 long double fpregs[8];
677 } float_env16;
678 double dtab[8];
679 double rtab[8];
680 int i;
681
682 for(i=0;i<8;i++)
683 dtab[i] = i + 1;
684
685 TEST_ENV(&float_env16, "data16 fnstenv", "data16 fldenv");
686 TEST_ENV(&float_env16, "data16 fnsave", "data16 frstor");
687 TEST_ENV(&float_env32, "fnstenv", "fldenv");
688 TEST_ENV(&float_env32, "fnsave", "frstor");
689 }
690
691
692 #define TEST_FCMOV(a, b, eflags, CC)\
693 {\
694 double res;\
695 asm("push %3\n"\
696 "popf\n"\
697 "fcmov" CC " %2, %0\n"\
698 : "=t" (res)\
699 : "0" (a), "u" (b), "g" (eflags));\
700 printf("fcmov%s eflags=0x%04x-> %f\n", \
701 CC, eflags, res);\
702 }
703
704 void test_fcmov(void)
705 {
706 double a, b;
707 int eflags, i;
708
709 a = 1.0;
710 b = 2.0;
711 for(i = 0; i < 4; i++) {
712 eflags = 0;
713 if (i & 1)
714 eflags |= CC_C;
715 if (i & 2)
716 eflags |= CC_Z;
717 TEST_FCMOV(a, b, eflags, "b");
718 TEST_FCMOV(a, b, eflags, "e");
719 TEST_FCMOV(a, b, eflags, "be");
720 TEST_FCMOV(a, b, eflags, "nb");
721 TEST_FCMOV(a, b, eflags, "ne");
722 TEST_FCMOV(a, b, eflags, "nbe");
723 }
724 TEST_FCMOV(a, b, 0, "u");
725 TEST_FCMOV(a, b, CC_P, "u");
726 TEST_FCMOV(a, b, 0, "nu");
727 TEST_FCMOV(a, b, CC_P, "nu");
728 }
729
730 void test_floats(void)
731 {
732 test_fops(2, 3);
733 test_fops(1.4, -5);
734 test_fcmp(2, -1);
735 test_fcmp(2, 2);
736 test_fcmp(2, 3);
737 test_fcvt(0.5);
738 test_fcvt(-0.5);
739 test_fcvt(1.0/7.0);
740 test_fcvt(-1.0/9.0);
741 test_fcvt(32768);
742 test_fcvt(-1e20);
743 test_fconst();
744 test_fbcd(1234567890123456);
745 test_fbcd(-123451234567890);
746 test_fenv();
747 if (TEST_CMOV) {
748 test_fcmov();
749 }
750 }
751
752 /**********************************************/
753
754 #define TEST_BCD(op, op0, cc_in, cc_mask)\
755 {\
756 int res, flags;\
757 res = op0;\
758 flags = cc_in;\
759 asm ("push %3\n\t"\
760 "popf\n\t"\
761 #op "\n\t"\
762 "pushf\n\t"\
763 "popl %1\n\t"\
764 : "=a" (res), "=g" (flags)\
765 : "0" (res), "1" (flags));\
766 printf("%-10s A=%08x R=%08x CCIN=%04x CC=%04x\n",\
767 #op, op0, res, cc_in, flags & cc_mask);\
768 }
769
770 void test_bcd(void)
771 {
772 TEST_BCD(daa, 0x12340503, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
773 TEST_BCD(daa, 0x12340506, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
774 TEST_BCD(daa, 0x12340507, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
775 TEST_BCD(daa, 0x12340559, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
776 TEST_BCD(daa, 0x12340560, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
777 TEST_BCD(daa, 0x1234059f, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
778 TEST_BCD(daa, 0x123405a0, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
779 TEST_BCD(daa, 0x12340503, 0, (CC_C | CC_P | CC_Z | CC_S | CC_A));
780 TEST_BCD(daa, 0x12340506, 0, (CC_C | CC_P | CC_Z | CC_S | CC_A));
781 TEST_BCD(daa, 0x12340503, CC_C, (CC_C | CC_P | CC_Z | CC_S | CC_A));
782 TEST_BCD(daa, 0x12340506, CC_C, (CC_C | CC_P | CC_Z | CC_S | CC_A));
783 TEST_BCD(daa, 0x12340503, CC_C | CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
784 TEST_BCD(daa, 0x12340506, CC_C | CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
785
786 TEST_BCD(das, 0x12340503, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
787 TEST_BCD(das, 0x12340506, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
788 TEST_BCD(das, 0x12340507, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
789 TEST_BCD(das, 0x12340559, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
790 TEST_BCD(das, 0x12340560, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
791 TEST_BCD(das, 0x1234059f, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
792 TEST_BCD(das, 0x123405a0, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
793 TEST_BCD(das, 0x12340503, 0, (CC_C | CC_P | CC_Z | CC_S | CC_A));
794 TEST_BCD(das, 0x12340506, 0, (CC_C | CC_P | CC_Z | CC_S | CC_A));
795 TEST_BCD(das, 0x12340503, CC_C, (CC_C | CC_P | CC_Z | CC_S | CC_A));
796 TEST_BCD(das, 0x12340506, CC_C, (CC_C | CC_P | CC_Z | CC_S | CC_A));
797 TEST_BCD(das, 0x12340503, CC_C | CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
798 TEST_BCD(das, 0x12340506, CC_C | CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
799
800 TEST_BCD(aaa, 0x12340205, CC_A, (CC_C | CC_A));
801 TEST_BCD(aaa, 0x12340306, CC_A, (CC_C | CC_A));
802 TEST_BCD(aaa, 0x1234040a, CC_A, (CC_C | CC_A));
803 TEST_BCD(aaa, 0x123405fa, CC_A, (CC_C | CC_A));
804 TEST_BCD(aaa, 0x12340205, 0, (CC_C | CC_A));
805 TEST_BCD(aaa, 0x12340306, 0, (CC_C | CC_A));
806 TEST_BCD(aaa, 0x1234040a, 0, (CC_C | CC_A));
807 TEST_BCD(aaa, 0x123405fa, 0, (CC_C | CC_A));
808
809 TEST_BCD(aas, 0x12340205, CC_A, (CC_C | CC_A));
810 TEST_BCD(aas, 0x12340306, CC_A, (CC_C | CC_A));
811 TEST_BCD(aas, 0x1234040a, CC_A, (CC_C | CC_A));
812 TEST_BCD(aas, 0x123405fa, CC_A, (CC_C | CC_A));
813 TEST_BCD(aas, 0x12340205, 0, (CC_C | CC_A));
814 TEST_BCD(aas, 0x12340306, 0, (CC_C | CC_A));
815 TEST_BCD(aas, 0x1234040a, 0, (CC_C | CC_A));
816 TEST_BCD(aas, 0x123405fa, 0, (CC_C | CC_A));
817
818 TEST_BCD(aam, 0x12340547, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_O | CC_A));
819 TEST_BCD(aad, 0x12340407, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_O | CC_A));
820 }
821
822 #define TEST_XCHG(op, size, opconst)\
823 {\
824 int op0, op1;\
825 op0 = 0x12345678;\
826 op1 = 0xfbca7654;\
827 asm(#op " %" size "0, %" size "1" \
828 : "=q" (op0), opconst (op1) \
829 : "0" (op0), "1" (op1));\
830 printf("%-10s A=%08x B=%08x\n",\
831 #op, op0, op1);\
832 }
833
834 #define TEST_CMPXCHG(op, size, opconst, eax)\
835 {\
836 int op0, op1;\
837 op0 = 0x12345678;\
838 op1 = 0xfbca7654;\
839 asm(#op " %" size "0, %" size "1" \
840 : "=q" (op0), opconst (op1) \
841 : "0" (op0), "1" (op1), "a" (eax));\
842 printf("%-10s EAX=%08x A=%08x C=%08x\n",\
843 #op, eax, op0, op1);\
844 }
845
846 void test_xchg(void)
847 {
848 TEST_XCHG(xchgl, "", "=q");
849 TEST_XCHG(xchgw, "w", "=q");
850 TEST_XCHG(xchgb, "b", "=q");
851
852 TEST_XCHG(xchgl, "", "=m");
853 TEST_XCHG(xchgw, "w", "=m");
854 TEST_XCHG(xchgb, "b", "=m");
855
856 TEST_XCHG(xaddl, "", "=q");
857 TEST_XCHG(xaddw, "w", "=q");
858 TEST_XCHG(xaddb, "b", "=q");
859
860 {
861 int res;
862 res = 0x12345678;
863 asm("xaddl %1, %0" : "=r" (res) : "0" (res));
864 printf("xaddl same res=%08x\n", res);
865 }
866
867 TEST_XCHG(xaddl, "", "=m");
868 TEST_XCHG(xaddw, "w", "=m");
869 TEST_XCHG(xaddb, "b", "=m");
870
871 TEST_CMPXCHG(cmpxchgl, "", "=q", 0xfbca7654);
872 TEST_CMPXCHG(cmpxchgw, "w", "=q", 0xfbca7654);
873 TEST_CMPXCHG(cmpxchgb, "b", "=q", 0xfbca7654);
874
875 TEST_CMPXCHG(cmpxchgl, "", "=q", 0xfffefdfc);
876 TEST_CMPXCHG(cmpxchgw, "w", "=q", 0xfffefdfc);
877 TEST_CMPXCHG(cmpxchgb, "b", "=q", 0xfffefdfc);
878
879 TEST_CMPXCHG(cmpxchgl, "", "=m", 0xfbca7654);
880 TEST_CMPXCHG(cmpxchgw, "w", "=m", 0xfbca7654);
881 TEST_CMPXCHG(cmpxchgb, "b", "=m", 0xfbca7654);
882
883 TEST_CMPXCHG(cmpxchgl, "", "=m", 0xfffefdfc);
884 TEST_CMPXCHG(cmpxchgw, "w", "=m", 0xfffefdfc);
885 TEST_CMPXCHG(cmpxchgb, "b", "=m", 0xfffefdfc);
886
887 {
888 uint64_t op0, op1, op2;
889 int i, eflags;
890
891 for(i = 0; i < 2; i++) {
892 op0 = 0x123456789abcd;
893 if (i == 0)
894 op1 = 0xfbca765423456;
895 else
896 op1 = op0;
897 op2 = 0x6532432432434;
898 asm("cmpxchg8b %1\n"
899 "pushf\n"
900 "popl %2\n"
901 : "=A" (op0), "=m" (op1), "=g" (eflags)
902 : "0" (op0), "m" (op1), "b" ((int)op2), "c" ((int)(op2 >> 32)));
903 printf("cmpxchg8b: op0=%016llx op1=%016llx CC=%02x\n",
904 op0, op1, eflags & CC_Z);
905 }
906 }
907 }
908
909 /**********************************************/
910 /* segmentation tests */
911
912 #include <asm/ldt.h>
913 #include <linux/unistd.h>
914 #include <linux/version.h>
915
916 _syscall3(int, modify_ldt, int, func, void *, ptr, unsigned long, bytecount)
917
918 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 66)
919 #define modify_ldt_ldt_s user_desc
920 #endif
921
922 uint8_t seg_data1[4096];
923 uint8_t seg_data2[4096];
924
925 #define MK_SEL(n) (((n) << 3) | 7)
926
927 #define TEST_LR(op, size, seg, mask)\
928 {\
929 int res, res2;\
930 res = 0x12345678;\
931 asm (op " %" size "2, %" size "0\n" \
932 "movl $0, %1\n"\
933 "jnz 1f\n"\
934 "movl $1, %1\n"\
935 "1:\n"\
936 : "=r" (res), "=r" (res2) : "m" (seg), "0" (res));\
937 printf(op ": Z=%d %08x\n", res2, res & ~(mask));\
938 }
939
940 /* NOTE: we use Linux modify_ldt syscall */
941 void test_segs(void)
942 {
943 struct modify_ldt_ldt_s ldt;
944 long long ldt_table[3];
945 int res, res2;
946 char tmp;
947 struct {
948 uint32_t offset;
949 uint16_t seg;
950 } __attribute__((packed)) segoff;
951
952 ldt.entry_number = 1;
953 ldt.base_addr = (unsigned long)&seg_data1;
954 ldt.limit = (sizeof(seg_data1) + 0xfff) >> 12;
955 ldt.seg_32bit = 1;
956 ldt.contents = MODIFY_LDT_CONTENTS_DATA;
957 ldt.read_exec_only = 0;
958 ldt.limit_in_pages = 1;
959 ldt.seg_not_present = 0;
960 ldt.useable = 1;
961 modify_ldt(1, &ldt, sizeof(ldt)); /* write ldt entry */
962
963 ldt.entry_number = 2;
964 ldt.base_addr = (unsigned long)&seg_data2;
965 ldt.limit = (sizeof(seg_data2) + 0xfff) >> 12;
966 ldt.seg_32bit = 1;
967 ldt.contents = MODIFY_LDT_CONTENTS_DATA;
968 ldt.read_exec_only = 0;
969 ldt.limit_in_pages = 1;
970 ldt.seg_not_present = 0;
971 ldt.useable = 1;
972 modify_ldt(1, &ldt, sizeof(ldt)); /* write ldt entry */
973
974 modify_ldt(0, &ldt_table, sizeof(ldt_table)); /* read ldt entries */
975 #if 0
976 {
977 int i;
978 for(i=0;i<3;i++)
979 printf("%d: %016Lx\n", i, ldt_table[i]);
980 }
981 #endif
982 /* do some tests with fs or gs */
983 asm volatile ("movl %0, %%fs" : : "r" (MK_SEL(1)));
984
985 seg_data1[1] = 0xaa;
986 seg_data2[1] = 0x55;
987
988 asm volatile ("fs movzbl 0x1, %0" : "=r" (res));
989 printf("FS[1] = %02x\n", res);
990
991 asm volatile ("pushl %%gs\n"
992 "movl %1, %%gs\n"
993 "gs movzbl 0x1, %0\n"
994 "popl %%gs\n"
995 : "=r" (res)
996 : "r" (MK_SEL(2)));
997 printf("GS[1] = %02x\n", res);
998
999 /* tests with ds/ss (implicit segment case) */
1000 tmp = 0xa5;
1001 asm volatile ("pushl %%ebp\n\t"
1002 "pushl %%ds\n\t"
1003 "movl %2, %%ds\n\t"
1004 "movl %3, %%ebp\n\t"
1005 "movzbl 0x1, %0\n\t"
1006 "movzbl (%%ebp), %1\n\t"
1007 "popl %%ds\n\t"
1008 "popl %%ebp\n\t"
1009 : "=r" (res), "=r" (res2)
1010 : "r" (MK_SEL(1)), "r" (&tmp));
1011 printf("DS[1] = %02x\n", res);
1012 printf("SS[tmp] = %02x\n", res2);
1013
1014 segoff.seg = MK_SEL(2);
1015 segoff.offset = 0xabcdef12;
1016 asm volatile("lfs %2, %0\n\t"
1017 "movl %%fs, %1\n\t"
1018 : "=r" (res), "=g" (res2)
1019 : "m" (segoff));
1020 printf("FS:reg = %04x:%08x\n", res2, res);
1021
1022 TEST_LR("larw", "w", MK_SEL(2), 0x0100);
1023 TEST_LR("larl", "", MK_SEL(2), 0x0100);
1024 TEST_LR("lslw", "w", MK_SEL(2), 0);
1025 TEST_LR("lsll", "", MK_SEL(2), 0);
1026
1027 TEST_LR("larw", "w", 0xfff8, 0);
1028 TEST_LR("larl", "", 0xfff8, 0);
1029 TEST_LR("lslw", "w", 0xfff8, 0);
1030 TEST_LR("lsll", "", 0xfff8, 0);
1031 }
1032
1033 /* 16 bit code test */
1034 extern char code16_start, code16_end;
1035 extern char code16_func1;
1036 extern char code16_func2;
1037 extern char code16_func3;
1038
1039 void test_code16(void)
1040 {
1041 struct modify_ldt_ldt_s ldt;
1042 int res, res2;
1043
1044 /* build a code segment */
1045 ldt.entry_number = 1;
1046 ldt.base_addr = (unsigned long)&code16_start;
1047 ldt.limit = &code16_end - &code16_start;
1048 ldt.seg_32bit = 0;
1049 ldt.contents = MODIFY_LDT_CONTENTS_CODE;
1050 ldt.read_exec_only = 0;
1051 ldt.limit_in_pages = 0;
1052 ldt.seg_not_present = 0;
1053 ldt.useable = 1;
1054 modify_ldt(1, &ldt, sizeof(ldt)); /* write ldt entry */
1055
1056 /* call the first function */
1057 asm volatile ("lcall %1, %2"
1058 : "=a" (res)
1059 : "i" (MK_SEL(1)), "i" (&code16_func1): "memory", "cc");
1060 printf("func1() = 0x%08x\n", res);
1061 asm volatile ("lcall %2, %3"
1062 : "=a" (res), "=c" (res2)
1063 : "i" (MK_SEL(1)), "i" (&code16_func2): "memory", "cc");
1064 printf("func2() = 0x%08x spdec=%d\n", res, res2);
1065 asm volatile ("lcall %1, %2"
1066 : "=a" (res)
1067 : "i" (MK_SEL(1)), "i" (&code16_func3): "memory", "cc");
1068 printf("func3() = 0x%08x\n", res);
1069 }
1070
1071 extern char func_lret32;
1072 extern char func_iret32;
1073
1074 void test_misc(void)
1075 {
1076 char table[256];
1077 int res, i;
1078
1079 for(i=0;i<256;i++) table[i] = 256 - i;
1080 res = 0x12345678;
1081 asm ("xlat" : "=a" (res) : "b" (table), "0" (res));
1082 printf("xlat: EAX=%08x\n", res);
1083
1084 asm volatile ("pushl %%cs ; call %1"
1085 : "=a" (res)
1086 : "m" (func_lret32): "memory", "cc");
1087 printf("func_lret32=%x\n", res);
1088
1089 asm volatile ("pushfl ; pushl %%cs ; call %1"
1090 : "=a" (res)
1091 : "m" (func_iret32): "memory", "cc");
1092 printf("func_iret32=%x\n", res);
1093
1094 /* specific popl test */
1095 asm volatile ("pushl $12345432 ; pushl $0x9abcdef ; popl (%%esp) ; popl %0"
1096 : "=g" (res));
1097 printf("popl esp=%x\n", res);
1098
1099 /* specific popw test */
1100 asm volatile ("pushl $12345432 ; pushl $0x9abcdef ; popw (%%esp) ; addl $2, %%esp ; popl %0"
1101 : "=g" (res));
1102 printf("popw esp=%x\n", res);
1103 }
1104
1105 uint8_t str_buffer[4096];
1106
1107 #define TEST_STRING1(OP, size, DF, REP)\
1108 {\
1109 int esi, edi, eax, ecx, eflags;\
1110 \
1111 esi = (long)(str_buffer + sizeof(str_buffer) / 2);\
1112 edi = (long)(str_buffer + sizeof(str_buffer) / 2) + 16;\
1113 eax = 0x12345678;\
1114 ecx = 17;\
1115 \
1116 asm volatile ("pushl $0\n\t"\
1117 "popf\n\t"\
1118 DF "\n\t"\
1119 REP #OP size "\n\t"\
1120 "cld\n\t"\
1121 "pushf\n\t"\
1122 "popl %4\n\t"\
1123 : "=S" (esi), "=D" (edi), "=a" (eax), "=c" (ecx), "=g" (eflags)\
1124 : "0" (esi), "1" (edi), "2" (eax), "3" (ecx));\
1125 printf("%-10s ESI=%08x EDI=%08x EAX=%08x ECX=%08x EFL=%04x\n",\
1126 REP #OP size, esi, edi, eax, ecx,\
1127 eflags & (CC_C | CC_P | CC_Z | CC_S | CC_O | CC_A));\
1128 }
1129
1130 #define TEST_STRING(OP, REP)\
1131 TEST_STRING1(OP, "b", "", REP);\
1132 TEST_STRING1(OP, "w", "", REP);\
1133 TEST_STRING1(OP, "l", "", REP);\
1134 TEST_STRING1(OP, "b", "std", REP);\
1135 TEST_STRING1(OP, "w", "std", REP);\
1136 TEST_STRING1(OP, "l", "std", REP)
1137
1138 void test_string(void)
1139 {
1140 int i;
1141 for(i = 0;i < sizeof(str_buffer); i++)
1142 str_buffer[i] = i + 0x56;
1143 TEST_STRING(stos, "");
1144 TEST_STRING(stos, "rep ");
1145 TEST_STRING(lods, ""); /* to verify stos */
1146 TEST_STRING(lods, "rep ");
1147 TEST_STRING(movs, "");
1148 TEST_STRING(movs, "rep ");
1149 TEST_STRING(lods, ""); /* to verify stos */
1150
1151 /* XXX: better tests */
1152 TEST_STRING(scas, "");
1153 TEST_STRING(scas, "repz ");
1154 TEST_STRING(scas, "repnz ");
1155 TEST_STRING(cmps, "");
1156 TEST_STRING(cmps, "repz ");
1157 TEST_STRING(cmps, "repnz ");
1158 }
1159
1160 /* VM86 test */
1161
1162 static inline void set_bit(uint8_t *a, unsigned int bit)
1163 {
1164 a[bit / 8] |= (1 << (bit % 8));
1165 }
1166
1167 static inline uint8_t *seg_to_linear(unsigned int seg, unsigned int reg)
1168 {
1169 return (uint8_t *)((seg << 4) + (reg & 0xffff));
1170 }
1171
1172 static inline void pushw(struct vm86_regs *r, int val)
1173 {
1174 r->esp = (r->esp & ~0xffff) | ((r->esp - 2) & 0xffff);
1175 *(uint16_t *)seg_to_linear(r->ss, r->esp) = val;
1176 }
1177
1178 #undef __syscall_return
1179 #define __syscall_return(type, res) \
1180 do { \
1181 return (type) (res); \
1182 } while (0)
1183
1184 _syscall2(int, vm86, int, func, struct vm86plus_struct *, v86)
1185
1186 extern char vm86_code_start;
1187 extern char vm86_code_end;
1188
1189 #define VM86_CODE_CS 0x100
1190 #define VM86_CODE_IP 0x100
1191
1192 void test_vm86(void)
1193 {
1194 struct vm86plus_struct ctx;
1195 struct vm86_regs *r;
1196 uint8_t *vm86_mem;
1197 int seg, ret;
1198
1199 vm86_mem = mmap((void *)0x00000000, 0x110000,
1200 PROT_WRITE | PROT_READ | PROT_EXEC,
1201 MAP_FIXED | MAP_ANON | MAP_PRIVATE, -1, 0);
1202 if (vm86_mem == MAP_FAILED) {
1203 printf("ERROR: could not map vm86 memory");
1204 return;
1205 }
1206 memset(&ctx, 0, sizeof(ctx));
1207
1208 /* init basic registers */
1209 r = &ctx.regs;
1210 r->eip = VM86_CODE_IP;
1211 r->esp = 0xfffe;
1212 seg = VM86_CODE_CS;
1213 r->cs = seg;
1214 r->ss = seg;
1215 r->ds = seg;
1216 r->es = seg;
1217 r->fs = seg;
1218 r->gs = seg;
1219 r->eflags = VIF_MASK;
1220
1221 /* move code to proper address. We use the same layout as a .com
1222 dos program. */
1223 memcpy(vm86_mem + (VM86_CODE_CS << 4) + VM86_CODE_IP,
1224 &vm86_code_start, &vm86_code_end - &vm86_code_start);
1225
1226 /* mark int 0x21 as being emulated */
1227 set_bit((uint8_t *)&ctx.int_revectored, 0x21);
1228
1229 for(;;) {
1230 ret = vm86(VM86_ENTER, &ctx);
1231 switch(VM86_TYPE(ret)) {
1232 case VM86_INTx:
1233 {
1234 int int_num, ah, v;
1235
1236 int_num = VM86_ARG(ret);
1237 if (int_num != 0x21)
1238 goto unknown_int;
1239 ah = (r->eax >> 8) & 0xff;
1240 switch(ah) {
1241 case 0x00: /* exit */
1242 goto the_end;
1243 case 0x02: /* write char */
1244 {
1245 uint8_t c = r->edx;
1246 putchar(c);
1247 }
1248 break;
1249 case 0x09: /* write string */
1250 {
1251 uint8_t c, *ptr;
1252 ptr = seg_to_linear(r->ds, r->edx);
1253 for(;;) {
1254 c = *ptr++;
1255 if (c == '$')
1256 break;
1257 putchar(c);
1258 }
1259 r->eax = (r->eax & ~0xff) | '$';
1260 }
1261 break;
1262 case 0xff: /* extension: write eflags number in edx */
1263 v = (int)r->edx;
1264 #ifndef LINUX_VM86_IOPL_FIX
1265 v &= ~0x3000;
1266 #endif
1267 printf("%08x\n", v);
1268 break;
1269 default:
1270 unknown_int:
1271 printf("unsupported int 0x%02x\n", int_num);
1272 goto the_end;
1273 }
1274 }
1275 break;
1276 case VM86_SIGNAL:
1277 /* a signal came, we just ignore that */
1278 break;
1279 case VM86_STI:
1280 break;
1281 default:
1282 printf("ERROR: unhandled vm86 return code (0x%x)\n", ret);
1283 goto the_end;
1284 }
1285 }
1286 the_end:
1287 printf("VM86 end\n");
1288 munmap(vm86_mem, 0x110000);
1289 }
1290
1291 /* exception tests */
1292 #ifndef REG_EAX
1293 #define REG_EAX EAX
1294 #define REG_EBX EBX
1295 #define REG_ECX ECX
1296 #define REG_EDX EDX
1297 #define REG_ESI ESI
1298 #define REG_EDI EDI
1299 #define REG_EBP EBP
1300 #define REG_ESP ESP
1301 #define REG_EIP EIP
1302 #define REG_EFL EFL
1303 #define REG_TRAPNO TRAPNO
1304 #define REG_ERR ERR
1305 #endif
1306
1307 jmp_buf jmp_env;
1308 int v1;
1309 int tab[2];
1310
1311 void sig_handler(int sig, siginfo_t *info, void *puc)
1312 {
1313 struct ucontext *uc = puc;
1314
1315 printf("si_signo=%d si_errno=%d si_code=%d",
1316 info->si_signo, info->si_errno, info->si_code);
1317 printf(" si_addr=0x%08lx",
1318 (unsigned long)info->si_addr);
1319 printf("\n");
1320
1321 printf("trapno=0x%02x err=0x%08x",
1322 uc->uc_mcontext.gregs[REG_TRAPNO],
1323 uc->uc_mcontext.gregs[REG_ERR]);
1324 printf(" EIP=0x%08x", uc->uc_mcontext.gregs[REG_EIP]);
1325 printf("\n");
1326 longjmp(jmp_env, 1);
1327 }
1328
1329 void test_exceptions(void)
1330 {
1331 struct modify_ldt_ldt_s ldt;
1332 struct sigaction act;
1333 volatile int val;
1334
1335 act.sa_sigaction = sig_handler;
1336 sigemptyset(&act.sa_mask);
1337 act.sa_flags = SA_SIGINFO;
1338 sigaction(SIGFPE, &act, NULL);
1339 sigaction(SIGILL, &act, NULL);
1340 sigaction(SIGSEGV, &act, NULL);
1341 sigaction(SIGBUS, &act, NULL);
1342 sigaction(SIGTRAP, &act, NULL);
1343
1344 /* test division by zero reporting */
1345 printf("DIVZ exception:\n");
1346 if (setjmp(jmp_env) == 0) {
1347 /* now divide by zero */
1348 v1 = 0;
1349 v1 = 2 / v1;
1350 }
1351
1352 printf("BOUND exception:\n");
1353 if (setjmp(jmp_env) == 0) {
1354 /* bound exception */
1355 tab[0] = 1;
1356 tab[1] = 10;
1357 asm volatile ("bound %0, %1" : : "r" (11), "m" (tab));
1358 }
1359
1360 printf("segment exceptions:\n");
1361 if (setjmp(jmp_env) == 0) {
1362 /* load an invalid segment */
1363 asm volatile ("movl %0, %%fs" : : "r" ((0x1234 << 3) | 1));
1364 }
1365 if (setjmp(jmp_env) == 0) {
1366 /* null data segment is valid */
1367 asm volatile ("movl %0, %%fs" : : "r" (3));
1368 /* null stack segment */
1369 asm volatile ("movl %0, %%ss" : : "r" (3));
1370 }
1371
1372 ldt.entry_number = 1;
1373 ldt.base_addr = (unsigned long)&seg_data1;
1374 ldt.limit = (sizeof(seg_data1) + 0xfff) >> 12;
1375 ldt.seg_32bit = 1;
1376 ldt.contents = MODIFY_LDT_CONTENTS_DATA;
1377 ldt.read_exec_only = 0;
1378 ldt.limit_in_pages = 1;
1379 ldt.seg_not_present = 1;
1380 ldt.useable = 1;
1381 modify_ldt(1, &ldt, sizeof(ldt)); /* write ldt entry */
1382
1383 if (setjmp(jmp_env) == 0) {
1384 /* segment not present */
1385 asm volatile ("movl %0, %%fs" : : "r" (MK_SEL(1)));
1386 }
1387
1388 /* test SEGV reporting */
1389 printf("PF exception:\n");
1390 if (setjmp(jmp_env) == 0) {
1391 val = 1;
1392 /* we add a nop to test a weird PC retrieval case */
1393 asm volatile ("nop");
1394 /* now store in an invalid address */
1395 *(char *)0x1234 = 1;
1396 }
1397
1398 /* test SEGV reporting */
1399 printf("PF exception:\n");
1400 if (setjmp(jmp_env) == 0) {
1401 val = 1;
1402 /* read from an invalid address */
1403 v1 = *(char *)0x1234;
1404 }
1405
1406 /* test illegal instruction reporting */
1407 printf("UD2 exception:\n");
1408 if (setjmp(jmp_env) == 0) {
1409 /* now execute an invalid instruction */
1410 asm volatile("ud2");
1411 }
1412 printf("lock nop exception:\n");
1413 if (setjmp(jmp_env) == 0) {
1414 /* now execute an invalid instruction */
1415 asm volatile("lock nop");
1416 }
1417
1418 printf("INT exception:\n");
1419 if (setjmp(jmp_env) == 0) {
1420 asm volatile ("int $0xfd");
1421 }
1422 if (setjmp(jmp_env) == 0) {
1423 asm volatile ("int $0x01");
1424 }
1425 if (setjmp(jmp_env) == 0) {
1426 asm volatile (".byte 0xcd, 0x03");
1427 }
1428 if (setjmp(jmp_env) == 0) {
1429 asm volatile ("int $0x04");
1430 }
1431 if (setjmp(jmp_env) == 0) {
1432 asm volatile ("int $0x05");
1433 }
1434
1435 printf("INT3 exception:\n");
1436 if (setjmp(jmp_env) == 0) {
1437 asm volatile ("int3");
1438 }
1439
1440 printf("CLI exception:\n");
1441 if (setjmp(jmp_env) == 0) {
1442 asm volatile ("cli");
1443 }
1444
1445 printf("STI exception:\n");
1446 if (setjmp(jmp_env) == 0) {
1447 asm volatile ("cli");
1448 }
1449
1450 printf("INTO exception:\n");
1451 if (setjmp(jmp_env) == 0) {
1452 /* overflow exception */
1453 asm volatile ("addl $1, %0 ; into" : : "r" (0x7fffffff));
1454 }
1455
1456 printf("OUTB exception:\n");
1457 if (setjmp(jmp_env) == 0) {
1458 asm volatile ("outb %%al, %%dx" : : "d" (0x4321), "a" (0));
1459 }
1460
1461 printf("INB exception:\n");
1462 if (setjmp(jmp_env) == 0) {
1463 asm volatile ("inb %%dx, %%al" : "=a" (val) : "d" (0x4321));
1464 }
1465
1466 printf("REP OUTSB exception:\n");
1467 if (setjmp(jmp_env) == 0) {
1468 asm volatile ("rep outsb" : : "d" (0x4321), "S" (tab), "c" (1));
1469 }
1470
1471 printf("REP INSB exception:\n");
1472 if (setjmp(jmp_env) == 0) {
1473 asm volatile ("rep insb" : : "d" (0x4321), "D" (tab), "c" (1));
1474 }
1475
1476 printf("HLT exception:\n");
1477 if (setjmp(jmp_env) == 0) {
1478 asm volatile ("hlt");
1479 }
1480
1481 printf("single step exception:\n");
1482 val = 0;
1483 if (setjmp(jmp_env) == 0) {
1484 asm volatile ("pushf\n"
1485 "orl $0x00100, (%%esp)\n"
1486 "popf\n"
1487 "movl $0xabcd, %0\n"
1488 "movl $0x0, %0\n" : "=m" (val) : : "cc", "memory");
1489 }
1490 printf("val=0x%x\n", val);
1491 }
1492
1493 /* specific precise single step test */
1494 void sig_trap_handler(int sig, siginfo_t *info, void *puc)
1495 {
1496 struct ucontext *uc = puc;
1497 printf("EIP=0x%08x\n", uc->uc_mcontext.gregs[REG_EIP]);
1498 }
1499
1500 const uint8_t sstep_buf1[4] = { 1, 2, 3, 4};
1501 uint8_t sstep_buf2[4];
1502
1503 void test_single_step(void)
1504 {
1505 struct sigaction act;
1506 volatile int val;
1507 int i;
1508
1509 val = 0;
1510 act.sa_sigaction = sig_trap_handler;
1511 sigemptyset(&act.sa_mask);
1512 act.sa_flags = SA_SIGINFO;
1513 sigaction(SIGTRAP, &act, NULL);
1514 asm volatile ("pushf\n"
1515 "orl $0x00100, (%%esp)\n"
1516 "popf\n"
1517 "movl $0xabcd, %0\n"
1518
1519 /* jmp test */
1520 "movl $3, %%ecx\n"
1521 "1:\n"
1522 "addl $1, %0\n"
1523 "decl %%ecx\n"
1524 "jnz 1b\n"
1525
1526 /* movsb: the single step should stop at each movsb iteration */
1527 "movl $sstep_buf1, %%esi\n"
1528 "movl $sstep_buf2, %%edi\n"
1529 "movl $0, %%ecx\n"
1530 "rep movsb\n"
1531 "movl $3, %%ecx\n"
1532 "rep movsb\n"
1533 "movl $1, %%ecx\n"
1534 "rep movsb\n"
1535
1536 /* cmpsb: the single step should stop at each cmpsb iteration */
1537 "movl $sstep_buf1, %%esi\n"
1538 "movl $sstep_buf2, %%edi\n"
1539 "movl $0, %%ecx\n"
1540 "rep cmpsb\n"
1541 "movl $4, %%ecx\n"
1542 "rep cmpsb\n"
1543
1544 /* getpid() syscall: single step should skip one
1545 instruction */
1546 "movl $20, %%eax\n"
1547 "int $0x80\n"
1548 "movl $0, %%eax\n"
1549
1550 /* when modifying SS, trace is not done on the next
1551 instruction */
1552 "movl %%ss, %%ecx\n"
1553 "movl %%ecx, %%ss\n"
1554 "addl $1, %0\n"
1555 "movl $1, %%eax\n"
1556 "movl %%ecx, %%ss\n"
1557 "jmp 1f\n"
1558 "addl $1, %0\n"
1559 "1:\n"
1560 "movl $1, %%eax\n"
1561 "pushl %%ecx\n"
1562 "popl %%ss\n"
1563 "addl $1, %0\n"
1564 "movl $1, %%eax\n"
1565
1566 "pushf\n"
1567 "andl $~0x00100, (%%esp)\n"
1568 "popf\n"
1569 : "=m" (val)
1570 :
1571 : "cc", "memory", "eax", "ecx", "esi", "edi");
1572 printf("val=%d\n", val);
1573 for(i = 0; i < 4; i++)
1574 printf("sstep_buf2[%d] = %d\n", i, sstep_buf2[i]);
1575 }
1576
1577 /* self modifying code test */
1578 uint8_t code[] = {
1579 0xb8, 0x1, 0x00, 0x00, 0x00, /* movl $1, %eax */
1580 0xc3, /* ret */
1581 };
1582
1583 asm("smc_code2:\n"
1584 "movl 4(%esp), %eax\n"
1585 "movl %eax, smc_patch_addr2 + 1\n"
1586 "nop\n"
1587 "nop\n"
1588 "nop\n"
1589 "nop\n"
1590 "nop\n"
1591 "nop\n"
1592 "nop\n"
1593 "nop\n"
1594 "smc_patch_addr2:\n"
1595 "movl $1, %eax\n"
1596 "ret\n");
1597
1598 typedef int FuncType(void);
1599 extern int smc_code2(int);
1600 void test_self_modifying_code(void)
1601 {
1602 int i;
1603
1604 printf("self modifying code:\n");
1605 printf("func1 = 0x%x\n", ((FuncType *)code)());
1606 for(i = 2; i <= 4; i++) {
1607 code[1] = i;
1608 printf("func%d = 0x%x\n", i, ((FuncType *)code)());
1609 }
1610
1611 /* more difficult test : the modified code is just after the
1612 modifying instruction. It is forbidden in Intel specs, but it
1613 is used by old DOS programs */
1614 for(i = 2; i <= 4; i++) {
1615 printf("smc_code2(%d) = %d\n", i, smc_code2(i));
1616 }
1617 }
1618
1619 static void *call_end __init_call = NULL;
1620
1621 int main(int argc, char **argv)
1622 {
1623 void **ptr;
1624 void (*func)(void);
1625
1626 ptr = &call_start + 1;
1627 while (*ptr != NULL) {
1628 func = *ptr++;
1629 func();
1630 }
1631 test_bsx();
1632 test_mul();
1633 test_jcc();
1634 test_floats();
1635 test_bcd();
1636 test_xchg();
1637 test_string();
1638 test_misc();
1639 test_lea();
1640 test_segs();
1641 test_code16();
1642 test_vm86();
1643 test_exceptions();
1644 test_self_modifying_code();
1645 test_single_step();
1646 return 0;
1647 }
Qemu copy for testing