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78d6da97
FB		 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 */
3a27ad0b 20#define _GNU_SOURCE
4d1135e4
FB		 21#include <stdlib.h>
22#include <stdio.h>
e3e86d56 23#include <string.h>
6dbad63e 24#include <inttypes.h>
4d1135e4 25#include <math.h>
3a27ad0b
FB		 26#include <signal.h>
27#include <setjmp.h>
070893f4 28#include <errno.h>
3a27ad0b
FB		 29#include <sys/ucontext.h>
30#include <sys/mman.h>
31#include <asm/vm86.h>
4d1135e4 32
03bfca94
FB		 33#define TEST_CMOV 0
34#define TEST_FCOMI 0
3ff0631e 35//#define LINUX_VM86_IOPL_FIX
791c2261 36//#define TEST_P4_FLAGS
5dd9488c 37
4d1135e4
FB		 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
4d1135e4
FB		 50#define __init_call __attribute__ ((unused,__section__ (".initcall.init")))
51
52static void *call_start __init_call = NULL;
53
4b74fe1f
FB		 54#define CC_MASK (CC_C | CC_P | CC_Z | CC_S | CC_O | CC_A)
55
4d1135e4
FB		 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
4b74fe1f
FB		 102#undef CC_MASK
103#define CC_MASK (CC_C | CC_P | CC_Z | CC_S | CC_O)
104
379ca80d
FB		 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
d57c4e01
FB		 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"
379ca80d 157
4d1135e4
FB		 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
176void 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{\
5dd9488c 260 int res;\
4d1135e4
FB		 261 asm("movl $1, %0\n\t"\
262 "cmpl %2, %1\n\t"\
5dd9488c 263 "j" JCC " 1f\n\t"\
4d1135e4
FB		 264 "movl $0, %0\n\t"\
265 "1:\n\t"\
266 : "=r" (res)\
267 : "r" (v1), "r" (v2));\
5dd9488c
FB		 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 } \
4d1135e4
FB		 290}
291
292/* various jump tests */
293void test_jcc(void)
294{
5dd9488c
FB		 295 TEST_JCC("ne", 1, 1);
296 TEST_JCC("ne", 1, 0);
4d1135e4 297
5dd9488c
FB		 298 TEST_JCC("e", 1, 1);
299 TEST_JCC("e", 1, 0);
4d1135e4 300
5dd9488c
FB		 301 TEST_JCC("l", 1, 1);
302 TEST_JCC("l", 1, 0);
303 TEST_JCC("l", 1, -1);
4d1135e4 304
5dd9488c
FB		 305 TEST_JCC("le", 1, 1);
306 TEST_JCC("le", 1, 0);
307 TEST_JCC("le", 1, -1);
4d1135e4 308
5dd9488c
FB		 309 TEST_JCC("ge", 1, 1);
310 TEST_JCC("ge", 1, 0);
311 TEST_JCC("ge", -1, 1);
4d1135e4 312
5dd9488c
FB		 313 TEST_JCC("g", 1, 1);
314 TEST_JCC("g", 1, 0);
315 TEST_JCC("g", 1, -1);
4d1135e4 316
5dd9488c
FB		 317 TEST_JCC("b", 1, 1);
318 TEST_JCC("b", 1, 0);
319 TEST_JCC("b", 1, -1);
4d1135e4 320
5dd9488c
FB		 321 TEST_JCC("be", 1, 1);
322 TEST_JCC("be", 1, 0);
323 TEST_JCC("be", 1, -1);
4d1135e4 324
5dd9488c
FB		 325 TEST_JCC("ae", 1, 1);
326 TEST_JCC("ae", 1, 0);
327 TEST_JCC("ae", 1, -1);
4d1135e4 328
5dd9488c
FB		 329 TEST_JCC("a", 1, 1);
330 TEST_JCC("a", 1, 0);
331 TEST_JCC("a", 1, -1);
4d1135e4
FB		 332
333
5dd9488c
FB		 334 TEST_JCC("p", 1, 1);
335 TEST_JCC("p", 1, 0);
4d1135e4 336
5dd9488c
FB		 337 TEST_JCC("np", 1, 1);
338 TEST_JCC("np", 1, 0);
4d1135e4 339
5dd9488c
FB		 340 TEST_JCC("o", 0x7fffffff, 0);
341 TEST_JCC("o", 0x7fffffff, -1);
4d1135e4 342
5dd9488c
FB		 343 TEST_JCC("no", 0x7fffffff, 0);
344 TEST_JCC("no", 0x7fffffff, -1);
4d1135e4 345
5dd9488c
FB		 346 TEST_JCC("s", 0, 1);
347 TEST_JCC("s", 0, -1);
348 TEST_JCC("s", 0, 0);
4d1135e4 349
5dd9488c
FB		 350 TEST_JCC("ns", 0, 1);
351 TEST_JCC("ns", 0, -1);
352 TEST_JCC("ns", 0, 0);
4d1135e4
FB		 353}
354
4b74fe1f 355#undef CC_MASK
791c2261
FB		 356#ifdef TEST_P4_FLAGS
357#define CC_MASK (CC_C | CC_P | CC_Z | CC_S | CC_O | CC_A)
358#else
4b74fe1f 359#define CC_MASK (CC_O | CC_C)
791c2261 360#endif
4b74fe1f
FB		 361
362#define OP mul
363#include "test-i386-muldiv.h"
364
365#define OP imul
366#include "test-i386-muldiv.h"
367
4b74fe1f
FB		 368void 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
386void 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
791c2261
FB		 404#undef CC_MASK
405#define CC_MASK (0)
406
407#define OP div
408#include "test-i386-muldiv.h"
409
410#define OP idiv
411#include "test-i386-muldiv.h"
412
4b74fe1f
FB		 413void test_mul(void)
414{
415 test_imulb(0x1234561d, 4);
416 test_imulb(3, -4);
417 test_imulb(0x80, 0x80);
418 test_imulb(0x10, 0x10);
419
420 test_imulw(0, 0x1234001d, 45);
421 test_imulw(0, 23, -45);
422 test_imulw(0, 0x8000, 0x8000);
423 test_imulw(0, 0x100, 0x100);
424
425 test_imull(0, 0x1234001d, 45);
426 test_imull(0, 23, -45);
427 test_imull(0, 0x80000000, 0x80000000);
428 test_imull(0, 0x10000, 0x10000);
429
430 test_mulb(0x1234561d, 4);
431 test_mulb(3, -4);
432 test_mulb(0x80, 0x80);
433 test_mulb(0x10, 0x10);
434
435 test_mulw(0, 0x1234001d, 45);
436 test_mulw(0, 23, -45);
437 test_mulw(0, 0x8000, 0x8000);
438 test_mulw(0, 0x100, 0x100);
439
440 test_mull(0, 0x1234001d, 45);
441 test_mull(0, 23, -45);
442 test_mull(0, 0x80000000, 0x80000000);
443 test_mull(0, 0x10000, 0x10000);
444
445 test_imulw2(0x1234001d, 45);
446 test_imulw2(23, -45);
447 test_imulw2(0x8000, 0x8000);
448 test_imulw2(0x100, 0x100);
449
450 test_imull2(0x1234001d, 45);
451 test_imull2(23, -45);
452 test_imull2(0x80000000, 0x80000000);
453 test_imull2(0x10000, 0x10000);
454
455 test_idivb(0x12341678, 0x127e);
456 test_idivb(0x43210123, -5);
457 test_idivb(0x12340004, -1);
458
459 test_idivw(0, 0x12345678, 12347);
460 test_idivw(0, -23223, -45);
461 test_idivw(0, 0x12348000, -1);
462 test_idivw(0x12343, 0x12345678, 0x81238567);
463
464 test_idivl(0, 0x12345678, 12347);
465 test_idivl(0, -233223, -45);
466 test_idivl(0, 0x80000000, -1);
467 test_idivl(0x12343, 0x12345678, 0x81234567);
468
469 test_divb(0x12341678, 0x127e);
470 test_divb(0x43210123, -5);
471 test_divb(0x12340004, -1);
472
473 test_divw(0, 0x12345678, 12347);
474 test_divw(0, -23223, -45);
475 test_divw(0, 0x12348000, -1);
476 test_divw(0x12343, 0x12345678, 0x81238567);
477
478 test_divl(0, 0x12345678, 12347);
479 test_divl(0, -233223, -45);
480 test_divl(0, 0x80000000, -1);
481 test_divl(0x12343, 0x12345678, 0x81234567);
482}
483
9d8e9c09
FB		 484#define TEST_BSX(op, size, op0)\
485{\
486 int res, val, resz;\
487 val = op0;\
488 asm("xorl %1, %1 ; " #op " %" size "2, %" size "0 ; setz %b1" \
489 : "=r" (res), "=q" (resz)\
490 : "g" (val));\
491 printf("%-10s A=%08x R=%08x %d\n", #op, val, resz ? 0 : res, resz);\
492}
493
494void test_bsx(void)
495{
496 TEST_BSX(bsrw, "w", 0);
497 TEST_BSX(bsrw, "w", 0x12340128);
498 TEST_BSX(bsrl, "", 0);
499 TEST_BSX(bsrl, "", 0x00340128);
500 TEST_BSX(bsfw, "w", 0);
501 TEST_BSX(bsfw, "w", 0x12340128);
502 TEST_BSX(bsfl, "", 0);
503 TEST_BSX(bsfl, "", 0x00340128);
504}
505
55480af8
FB		 506/**********************************************/
507
9d8e9c09
FB		 508void test_fops(double a, double b)
509{
510 printf("a=%f b=%f a+b=%f\n", a, b, a + b);
511 printf("a=%f b=%f a-b=%f\n", a, b, a - b);
512 printf("a=%f b=%f a*b=%f\n", a, b, a * b);
513 printf("a=%f b=%f a/b=%f\n", a, b, a / b);
514 printf("a=%f b=%f fmod(a, b)=%f\n", a, b, fmod(a, b));
515 printf("a=%f sqrt(a)=%f\n", a, sqrt(a));
516 printf("a=%f sin(a)=%f\n", a, sin(a));
517 printf("a=%f cos(a)=%f\n", a, cos(a));
518 printf("a=%f tan(a)=%f\n", a, tan(a));
519 printf("a=%f log(a)=%f\n", a, log(a));
520 printf("a=%f exp(a)=%f\n", a, exp(a));
521 printf("a=%f b=%f atan2(a, b)=%f\n", a, b, atan2(a, b));
522 /* just to test some op combining */
523 printf("a=%f asin(sin(a))=%f\n", a, asin(sin(a)));
524 printf("a=%f acos(cos(a))=%f\n", a, acos(cos(a)));
525 printf("a=%f atan(tan(a))=%f\n", a, atan(tan(a)));
526
527}
528
529void test_fcmp(double a, double b)
530{
531 printf("(%f<%f)=%d\n",
532 a, b, a < b);
533 printf("(%f<=%f)=%d\n",
534 a, b, a <= b);
535 printf("(%f==%f)=%d\n",
536 a, b, a == b);
537 printf("(%f>%f)=%d\n",
538 a, b, a > b);
539 printf("(%f<=%f)=%d\n",
540 a, b, a >= b);
03bfca94
FB		 541 if (TEST_FCOMI) {
542 unsigned int eflags;
543 /* test f(u)comi instruction */
544 asm("fcomi %2, %1\n"
545 "pushf\n"
546 "pop %0\n"
547 : "=r" (eflags)
548 : "t" (a), "u" (b));
549 printf("fcomi(%f %f)=%08x\n", a, b, eflags & (CC_Z | CC_P | CC_C));
550 }
9d8e9c09
FB		 551}
552
553void test_fcvt(double a)
554{
555 float fa;
556 long double la;
ea768640
FB		 557 int16_t fpuc;
558 int i;
559 int64_t lla;
560 int ia;
561 int16_t wa;
562 double ra;
9d8e9c09
FB		 563
564 fa = a;
565 la = a;
566 printf("(float)%f = %f\n", a, fa);
567 printf("(long double)%f = %Lf\n", a, la);
c5e9815d
FB		 568 printf("a=%016Lx\n", *(long long *)&a);
569 printf("la=%016Lx %04x\n", *(long long *)&la,
570 *(unsigned short *)((char *)(&la) + 8));
ea768640
FB		 571
572 /* test all roundings */
573 asm volatile ("fstcw %0" : "=m" (fpuc));
574 for(i=0;i<4;i++) {
575 asm volatile ("fldcw %0" : : "m" ((fpuc & ~0x0c00) | (i << 10)));
576 asm volatile ("fist %0" : "=m" (wa) : "t" (a));
577 asm volatile ("fistl %0" : "=m" (ia) : "t" (a));
578 asm volatile ("fistpll %0" : "=m" (lla) : "t" (a) : "st");
579 asm volatile ("frndint ; fstl %0" : "=m" (ra) : "t" (a));
580 asm volatile ("fldcw %0" : : "m" (fpuc));
581 printf("(short)a = %d\n", wa);
582 printf("(int)a = %d\n", ia);
583 printf("(int64_t)a = %Ld\n", lla);
584 printf("rint(a) = %f\n", ra);
585 }
9d8e9c09
FB		 586}
587
588#define TEST(N) \
589 asm("fld" #N : "=t" (a)); \
590 printf("fld" #N "= %f\n", a);
591
592void test_fconst(void)
593{
594 double a;
595 TEST(1);
596 TEST(l2t);
597 TEST(l2e);
598 TEST(pi);
599 TEST(lg2);
600 TEST(ln2);
601 TEST(z);
602}
603
c5e9815d
FB		 604void test_fbcd(double a)
605{
606 unsigned short bcd[5];
607 double b;
608
609 asm("fbstp %0" : "=m" (bcd[0]) : "t" (a) : "st");
610 asm("fbld %1" : "=t" (b) : "m" (bcd[0]));
611 printf("a=%f bcd=%04x%04x%04x%04x%04x b=%f\n",
612 a, bcd[4], bcd[3], bcd[2], bcd[1], bcd[0], b);
613}
614
6b2b6112 615#define TEST_ENV(env, save, restore)\
03bfca94
FB		 616{\
617 memset((env), 0xaa, sizeof(*(env)));\
6b2b6112
FB		 618 for(i=0;i<5;i++)\
619 asm volatile ("fldl %0" : : "m" (dtab[i]));\
620 asm(save " %0\n" : : "m" (*(env)));\
621 asm(restore " %0\n": : "m" (*(env)));\
622 for(i=0;i<5;i++)\
623 asm volatile ("fstpl %0" : "=m" (rtab[i]));\
624 for(i=0;i<5;i++)\
625 printf("res[%d]=%f\n", i, rtab[i]);\
03bfca94
FB		 626 printf("fpuc=%04x fpus=%04x fptag=%04x\n",\
627 (env)->fpuc,\
628 (env)->fpus & 0xff00,\
629 (env)->fptag);\
03bfca94
FB		 630}
631
632void test_fenv(void)
633{
634 struct __attribute__((packed)) {
635 uint16_t fpuc;
636 uint16_t dummy1;
637 uint16_t fpus;
638 uint16_t dummy2;
639 uint16_t fptag;
640 uint16_t dummy3;
641 uint32_t ignored[4];
642 long double fpregs[8];
643 } float_env32;
644 struct __attribute__((packed)) {
645 uint16_t fpuc;
646 uint16_t fpus;
647 uint16_t fptag;
648 uint16_t ignored[4];
649 long double fpregs[8];
650 } float_env16;
6b2b6112
FB		 651 double dtab[8];
652 double rtab[8];
653 int i;
654
655 for(i=0;i<8;i++)
656 dtab[i] = i + 1;
03bfca94 657
6b2b6112
FB		 658 TEST_ENV(&float_env16, "data16 fnstenv", "data16 fldenv");
659 TEST_ENV(&float_env16, "data16 fnsave", "data16 frstor");
660 TEST_ENV(&float_env32, "fnstenv", "fldenv");
661 TEST_ENV(&float_env32, "fnsave", "frstor");
03bfca94
FB		 662}
663
75175024
FB		 664
665#define TEST_FCMOV(a, b, eflags, CC)\
666{\
667 double res;\
668 asm("push %3\n"\
669 "popf\n"\
670 "fcmov" CC " %2, %0\n"\
671 : "=t" (res)\
672 : "0" (a), "u" (b), "g" (eflags));\
673 printf("fcmov%s eflags=0x%04x-> %f\n", \
674 CC, eflags, res);\
675}
676
677void test_fcmov(void)
678{
679 double a, b;
680 int eflags, i;
681
682 a = 1.0;
683 b = 2.0;
684 for(i = 0; i < 4; i++) {
685 eflags = 0;
686 if (i & 1)
687 eflags |= CC_C;
688 if (i & 2)
689 eflags |= CC_Z;
690 TEST_FCMOV(a, b, eflags, "b");
691 TEST_FCMOV(a, b, eflags, "e");
692 TEST_FCMOV(a, b, eflags, "be");
693 TEST_FCMOV(a, b, eflags, "nb");
694 TEST_FCMOV(a, b, eflags, "ne");
695 TEST_FCMOV(a, b, eflags, "nbe");
696 }
697 TEST_FCMOV(a, b, 0, "u");
9cdf757f
FB		 698 TEST_FCMOV(a, b, CC_P, "u");
699 TEST_FCMOV(a, b, 0, "nu");
75175024
FB		 700 TEST_FCMOV(a, b, CC_P, "nu");
701}
702
9d8e9c09
FB		 703void test_floats(void)
704{
705 test_fops(2, 3);
706 test_fops(1.4, -5);
707 test_fcmp(2, -1);
708 test_fcmp(2, 2);
709 test_fcmp(2, 3);
ea768640
FB		 710 test_fcvt(0.5);
711 test_fcvt(-0.5);
9d8e9c09
FB		 712 test_fcvt(1.0/7.0);
713 test_fcvt(-1.0/9.0);
ea768640
FB		 714 test_fcvt(32768);
715 test_fcvt(-1e20);
9d8e9c09 716 test_fconst();
c5e9815d
FB		 717 test_fbcd(1234567890123456);
718 test_fbcd(-123451234567890);
03bfca94 719 test_fenv();
75175024
FB		 720 if (TEST_CMOV) {
721 test_fcmov();
722 }
9d8e9c09 723}
4b74fe1f 724
55480af8
FB		 725/**********************************************/
726
727#define TEST_BCD(op, op0, cc_in, cc_mask)\
728{\
729 int res, flags;\
730 res = op0;\
731 flags = cc_in;\
732 asm ("push %3\n\t"\
733 "popf\n\t"\
734 #op "\n\t"\
735 "pushf\n\t"\
736 "popl %1\n\t"\
737 : "=a" (res), "=g" (flags)\
738 : "0" (res), "1" (flags));\
739 printf("%-10s A=%08x R=%08x CCIN=%04x CC=%04x\n",\
740 #op, op0, res, cc_in, flags & cc_mask);\
741}
742
743void test_bcd(void)
744{
745 TEST_BCD(daa, 0x12340503, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
746 TEST_BCD(daa, 0x12340506, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
747 TEST_BCD(daa, 0x12340507, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
748 TEST_BCD(daa, 0x12340559, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
749 TEST_BCD(daa, 0x12340560, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
750 TEST_BCD(daa, 0x1234059f, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
751 TEST_BCD(daa, 0x123405a0, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
752 TEST_BCD(daa, 0x12340503, 0, (CC_C | CC_P | CC_Z | CC_S | CC_A));
753 TEST_BCD(daa, 0x12340506, 0, (CC_C | CC_P | CC_Z | CC_S | CC_A));
754 TEST_BCD(daa, 0x12340503, CC_C, (CC_C | CC_P | CC_Z | CC_S | CC_A));
755 TEST_BCD(daa, 0x12340506, CC_C, (CC_C | CC_P | CC_Z | CC_S | CC_A));
756 TEST_BCD(daa, 0x12340503, CC_C | CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
757 TEST_BCD(daa, 0x12340506, CC_C | CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
758
759 TEST_BCD(das, 0x12340503, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
760 TEST_BCD(das, 0x12340506, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
761 TEST_BCD(das, 0x12340507, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
762 TEST_BCD(das, 0x12340559, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
763 TEST_BCD(das, 0x12340560, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
764 TEST_BCD(das, 0x1234059f, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
765 TEST_BCD(das, 0x123405a0, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
766 TEST_BCD(das, 0x12340503, 0, (CC_C | CC_P | CC_Z | CC_S | CC_A));
767 TEST_BCD(das, 0x12340506, 0, (CC_C | CC_P | CC_Z | CC_S | CC_A));
768 TEST_BCD(das, 0x12340503, CC_C, (CC_C | CC_P | CC_Z | CC_S | CC_A));
769 TEST_BCD(das, 0x12340506, CC_C, (CC_C | CC_P | CC_Z | CC_S | CC_A));
770 TEST_BCD(das, 0x12340503, CC_C | CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
771 TEST_BCD(das, 0x12340506, CC_C | CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
772
773 TEST_BCD(aaa, 0x12340205, CC_A, (CC_C | CC_A));
774 TEST_BCD(aaa, 0x12340306, CC_A, (CC_C | CC_A));
775 TEST_BCD(aaa, 0x1234040a, CC_A, (CC_C | CC_A));
776 TEST_BCD(aaa, 0x123405fa, CC_A, (CC_C | CC_A));
777 TEST_BCD(aaa, 0x12340205, 0, (CC_C | CC_A));
778 TEST_BCD(aaa, 0x12340306, 0, (CC_C | CC_A));
779 TEST_BCD(aaa, 0x1234040a, 0, (CC_C | CC_A));
780 TEST_BCD(aaa, 0x123405fa, 0, (CC_C | CC_A));
781
782 TEST_BCD(aas, 0x12340205, CC_A, (CC_C | CC_A));
783 TEST_BCD(aas, 0x12340306, CC_A, (CC_C | CC_A));
784 TEST_BCD(aas, 0x1234040a, CC_A, (CC_C | CC_A));
785 TEST_BCD(aas, 0x123405fa, CC_A, (CC_C | CC_A));
786 TEST_BCD(aas, 0x12340205, 0, (CC_C | CC_A));
787 TEST_BCD(aas, 0x12340306, 0, (CC_C | CC_A));
788 TEST_BCD(aas, 0x1234040a, 0, (CC_C | CC_A));
789 TEST_BCD(aas, 0x123405fa, 0, (CC_C | CC_A));
790
791 TEST_BCD(aam, 0x12340547, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_O | CC_A));
792 TEST_BCD(aad, 0x12340407, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_O | CC_A));
793}
794
e5918247
FB		 795#define TEST_XCHG(op, size, opconst)\
796{\
797 int op0, op1;\
798 op0 = 0x12345678;\
799 op1 = 0xfbca7654;\
800 asm(#op " %" size "0, %" size "1" \
801 : "=q" (op0), opconst (op1) \
802 : "0" (op0), "1" (op1));\
803 printf("%-10s A=%08x B=%08x\n",\
804 #op, op0, op1);\
805}
806
807#define TEST_CMPXCHG(op, size, opconst, eax)\
808{\
809 int op0, op1;\
810 op0 = 0x12345678;\
811 op1 = 0xfbca7654;\
812 asm(#op " %" size "0, %" size "1" \
813 : "=q" (op0), opconst (op1) \
814 : "0" (op0), "1" (op1), "a" (eax));\
815 printf("%-10s EAX=%08x A=%08x C=%08x\n",\
816 #op, eax, op0, op1);\
817}
818
819void test_xchg(void)
820{
821 TEST_XCHG(xchgl, "", "=q");
822 TEST_XCHG(xchgw, "w", "=q");
823 TEST_XCHG(xchgb, "b", "=q");
824
825 TEST_XCHG(xchgl, "", "=m");
826 TEST_XCHG(xchgw, "w", "=m");
827 TEST_XCHG(xchgb, "b", "=m");
828
829 TEST_XCHG(xaddl, "", "=q");
830 TEST_XCHG(xaddw, "w", "=q");
831 TEST_XCHG(xaddb, "b", "=q");
832
d575b78a
FB		 833 {
834 int res;
835 res = 0x12345678;
836 asm("xaddl %1, %0" : "=r" (res) : "0" (res));
837 printf("xaddl same res=%08x\n", res);
838 }
839
e5918247
FB		 840 TEST_XCHG(xaddl, "", "=m");
841 TEST_XCHG(xaddw, "w", "=m");
842 TEST_XCHG(xaddb, "b", "=m");
843
844 TEST_CMPXCHG(cmpxchgl, "", "=q", 0xfbca7654);
845 TEST_CMPXCHG(cmpxchgw, "w", "=q", 0xfbca7654);
846 TEST_CMPXCHG(cmpxchgb, "b", "=q", 0xfbca7654);
847
848 TEST_CMPXCHG(cmpxchgl, "", "=q", 0xfffefdfc);
849 TEST_CMPXCHG(cmpxchgw, "w", "=q", 0xfffefdfc);
850 TEST_CMPXCHG(cmpxchgb, "b", "=q", 0xfffefdfc);
851
852 TEST_CMPXCHG(cmpxchgl, "", "=m", 0xfbca7654);
853 TEST_CMPXCHG(cmpxchgw, "w", "=m", 0xfbca7654);
854 TEST_CMPXCHG(cmpxchgb, "b", "=m", 0xfbca7654);
855
856 TEST_CMPXCHG(cmpxchgl, "", "=m", 0xfffefdfc);
857 TEST_CMPXCHG(cmpxchgw, "w", "=m", 0xfffefdfc);
858 TEST_CMPXCHG(cmpxchgb, "b", "=m", 0xfffefdfc);
d575b78a
FB		 859
860 {
861 uint64_t op0, op1, op2;
862 int i, eflags;
863
864 for(i = 0; i < 2; i++) {
865 op0 = 0x123456789abcd;
866 if (i == 0)
867 op1 = 0xfbca765423456;
868 else
869 op1 = op0;
870 op2 = 0x6532432432434;
871 asm("cmpxchg8b %1\n"
872 "pushf\n"
873 "popl %2\n"
874 : "=A" (op0), "=m" (op1), "=g" (eflags)
875 : "0" (op0), "m" (op1), "b" ((int)op2), "c" ((int)(op2 >> 32)));
876 printf("cmpxchg8b: op0=%016llx op1=%016llx CC=%02x\n",
877 op0, op1, eflags & CC_Z);
878 }
879 }
e5918247
FB		 880}
881
6dbad63e
FB		 882/**********************************************/
883/* segmentation tests */
884
885#include <asm/ldt.h>
886#include <linux/unistd.h>
73bdea19 887#include <linux/version.h>
6dbad63e
FB		 888
889_syscall3(int, modify_ldt, int, func, void *, ptr, unsigned long, bytecount)
890
73bdea19
FB		 891#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 66)
892#define modify_ldt_ldt_s user_desc
893#endif
894
6dbad63e
FB		 895uint8_t seg_data1[4096];
896uint8_t seg_data2[4096];
897
e5918247 898#define MK_SEL(n) (((n) << 3) | 7)
6dbad63e 899
288426fe
FB		 900#define TEST_LR(op, size, seg, mask)\
901{\
902 int res, res2;\
903 res = 0x12345678;\
904 asm (op " %" size "2, %" size "0\n" \
905 "movl $0, %1\n"\
906 "jnz 1f\n"\
907 "movl $1, %1\n"\
908 "1:\n"\
909 : "=r" (res), "=r" (res2) : "m" (seg), "0" (res));\
910 printf(op ": Z=%d %08x\n", res2, res & ~(mask));\
911}
912
6dbad63e
FB		 913/* NOTE: we use Linux modify_ldt syscall */
914void test_segs(void)
915{
916 struct modify_ldt_ldt_s ldt;
917 long long ldt_table[3];
04369ff2 918 int res, res2;
6dbad63e 919 char tmp;
e1d4294a
FB		 920 struct {
921 uint32_t offset;
922 uint16_t seg;
923 } __attribute__((packed)) segoff;
6dbad63e
FB		 924
925 ldt.entry_number = 1;
926 ldt.base_addr = (unsigned long)&seg_data1;
927 ldt.limit = (sizeof(seg_data1) + 0xfff) >> 12;
928 ldt.seg_32bit = 1;
929 ldt.contents = MODIFY_LDT_CONTENTS_DATA;
930 ldt.read_exec_only = 0;
931 ldt.limit_in_pages = 1;
932 ldt.seg_not_present = 0;
933 ldt.useable = 1;
934 modify_ldt(1, &ldt, sizeof(ldt)); /* write ldt entry */
935
936 ldt.entry_number = 2;
937 ldt.base_addr = (unsigned long)&seg_data2;
938 ldt.limit = (sizeof(seg_data2) + 0xfff) >> 12;
939 ldt.seg_32bit = 1;
940 ldt.contents = MODIFY_LDT_CONTENTS_DATA;
941 ldt.read_exec_only = 0;
942 ldt.limit_in_pages = 1;
943 ldt.seg_not_present = 0;
944 ldt.useable = 1;
945 modify_ldt(1, &ldt, sizeof(ldt)); /* write ldt entry */
946
947 modify_ldt(0, &ldt_table, sizeof(ldt_table)); /* read ldt entries */
04369ff2
FB		 948#if 0
949 {
950 int i;
951 for(i=0;i<3;i++)
952 printf("%d: %016Lx\n", i, ldt_table[i]);
953 }
954#endif
6dbad63e
FB		 955 /* do some tests with fs or gs */
956 asm volatile ("movl %0, %%fs" : : "r" (MK_SEL(1)));
6dbad63e
FB		 957
958 seg_data1[1] = 0xaa;
959 seg_data2[1] = 0x55;
960
961 asm volatile ("fs movzbl 0x1, %0" : "=r" (res));
962 printf("FS[1] = %02x\n", res);
963
070893f4
FB		 964 asm volatile ("pushl %%gs\n"
965 "movl %1, %%gs\n"
966 "gs movzbl 0x1, %0\n"
967 "popl %%gs\n"
968 : "=r" (res)
969 : "r" (MK_SEL(2)));
6dbad63e
FB		 970 printf("GS[1] = %02x\n", res);
971
972 /* tests with ds/ss (implicit segment case) */
973 tmp = 0xa5;
974 asm volatile ("pushl %%ebp\n\t"
975 "pushl %%ds\n\t"
976 "movl %2, %%ds\n\t"
977 "movl %3, %%ebp\n\t"
978 "movzbl 0x1, %0\n\t"
979 "movzbl (%%ebp), %1\n\t"
980 "popl %%ds\n\t"
981 "popl %%ebp\n\t"
982 : "=r" (res), "=r" (res2)
983 : "r" (MK_SEL(1)), "r" (&tmp));
984 printf("DS[1] = %02x\n", res);
985 printf("SS[tmp] = %02x\n", res2);
e1d4294a
FB		 986
987 segoff.seg = MK_SEL(2);
988 segoff.offset = 0xabcdef12;
989 asm volatile("lfs %2, %0\n\t"
990 "movl %%fs, %1\n\t"
991 : "=r" (res), "=g" (res2)
992 : "m" (segoff));
993 printf("FS:reg = %04x:%08x\n", res2, res);
288426fe
FB		 994
995 TEST_LR("larw", "w", MK_SEL(2), 0x0100);
996 TEST_LR("larl", "", MK_SEL(2), 0x0100);
997 TEST_LR("lslw", "w", MK_SEL(2), 0);
998 TEST_LR("lsll", "", MK_SEL(2), 0);
999
1000 TEST_LR("larw", "w", 0xfff8, 0);
1001 TEST_LR("larl", "", 0xfff8, 0);
1002 TEST_LR("lslw", "w", 0xfff8, 0);
1003 TEST_LR("lsll", "", 0xfff8, 0);
6dbad63e 1004}
55480af8 1005
e5918247
FB		 1006/* 16 bit code test */
1007extern char code16_start, code16_end;
1008extern char code16_func1;
1009extern char code16_func2;
1010extern char code16_func3;
a300e691 1011
e5918247 1012void test_code16(void)
1a9353d2 1013{
e5918247
FB		 1014 struct modify_ldt_ldt_s ldt;
1015 int res, res2;
a300e691 1016
e5918247
FB		 1017 /* build a code segment */
1018 ldt.entry_number = 1;
1019 ldt.base_addr = (unsigned long)&code16_start;
1020 ldt.limit = &code16_end - &code16_start;
1021 ldt.seg_32bit = 0;
1022 ldt.contents = MODIFY_LDT_CONTENTS_CODE;
1023 ldt.read_exec_only = 0;
1024 ldt.limit_in_pages = 0;
1025 ldt.seg_not_present = 0;
1026 ldt.useable = 1;
1027 modify_ldt(1, &ldt, sizeof(ldt)); /* write ldt entry */
a300e691 1028
e5918247
FB		 1029 /* call the first function */
1030 asm volatile ("lcall %1, %2"
1031 : "=a" (res)
1032 : "i" (MK_SEL(1)), "i" (&code16_func1): "memory", "cc");
1033 printf("func1() = 0x%08x\n", res);
1034 asm volatile ("lcall %2, %3"
1035 : "=a" (res), "=c" (res2)
1036 : "i" (MK_SEL(1)), "i" (&code16_func2): "memory", "cc");
1037 printf("func2() = 0x%08x spdec=%d\n", res, res2);
1038 asm volatile ("lcall %1, %2"
1039 : "=a" (res)
1040 : "i" (MK_SEL(1)), "i" (&code16_func3): "memory", "cc");
1041 printf("func3() = 0x%08x\n", res);
1a9353d2
FB		 1042}
1043
dd3587f3
FB		 1044extern char func_lret32;
1045extern char func_iret32;
1046
e1d4294a
FB		 1047void test_misc(void)
1048{
1049 char table[256];
1050 int res, i;
1051
1052 for(i=0;i<256;i++) table[i] = 256 - i;
1053 res = 0x12345678;
1054 asm ("xlat" : "=a" (res) : "b" (table), "0" (res));
1055 printf("xlat: EAX=%08x\n", res);
dd3587f3
FB		 1056
1057 asm volatile ("pushl %%cs ; call %1"
1058 : "=a" (res)
1059 : "m" (func_lret32): "memory", "cc");
1060 printf("func_lret32=%x\n", res);
1061
1062 asm volatile ("pushfl ; pushl %%cs ; call %1"
1063 : "=a" (res)
1064 : "m" (func_iret32): "memory", "cc");
1065 printf("func_iret32=%x\n", res);
1066
1067 /* specific popl test */
1068 asm volatile ("pushl $12345432 ; pushl $0x9abcdef ; popl (%%esp) ; popl %0"
1069 : "=g" (res));
1070 printf("popl esp=%x\n", res);
b2b5fb22
FB		 1071
1072 /* specific popw test */
1073 asm volatile ("pushl $12345432 ; pushl $0x9abcdef ; popw (%%esp) ; addl $2, %%esp ; popl %0"
1074 : "=g" (res));
1075 printf("popw esp=%x\n", res);
e1d4294a
FB		 1076}
1077
1078uint8_t str_buffer[4096];
1079
1080#define TEST_STRING1(OP, size, DF, REP)\
1081{\
1082 int esi, edi, eax, ecx, eflags;\
1083\
1084 esi = (long)(str_buffer + sizeof(str_buffer) / 2);\
1085 edi = (long)(str_buffer + sizeof(str_buffer) / 2) + 16;\
1086 eax = 0x12345678;\
1087 ecx = 17;\
1088\
1089 asm volatile ("pushl $0\n\t"\
1090 "popf\n\t"\
1091 DF "\n\t"\
1092 REP #OP size "\n\t"\
1093 "cld\n\t"\
1094 "pushf\n\t"\
1095 "popl %4\n\t"\
1096 : "=S" (esi), "=D" (edi), "=a" (eax), "=c" (ecx), "=g" (eflags)\
1097 : "0" (esi), "1" (edi), "2" (eax), "3" (ecx));\
1098 printf("%-10s ESI=%08x EDI=%08x EAX=%08x ECX=%08x EFL=%04x\n",\
1099 REP #OP size, esi, edi, eax, ecx,\
1100 eflags & (CC_C | CC_P | CC_Z | CC_S | CC_O | CC_A));\
1101}
1102
1103#define TEST_STRING(OP, REP)\
1104 TEST_STRING1(OP, "b", "", REP);\
1105 TEST_STRING1(OP, "w", "", REP);\
1106 TEST_STRING1(OP, "l", "", REP);\
1107 TEST_STRING1(OP, "b", "std", REP);\
1108 TEST_STRING1(OP, "w", "std", REP);\
1109 TEST_STRING1(OP, "l", "std", REP)
1110
1111void test_string(void)
1112{
1113 int i;
1114 for(i = 0;i < sizeof(str_buffer); i++)
1115 str_buffer[i] = i + 0x56;
1116 TEST_STRING(stos, "");
1117 TEST_STRING(stos, "rep ");
1118 TEST_STRING(lods, ""); /* to verify stos */
1119 TEST_STRING(lods, "rep ");
1120 TEST_STRING(movs, "");
1121 TEST_STRING(movs, "rep ");
1122 TEST_STRING(lods, ""); /* to verify stos */
1123
1124 /* XXX: better tests */
1125 TEST_STRING(scas, "");
1126 TEST_STRING(scas, "repz ");
1127 TEST_STRING(scas, "repnz ");
1128 TEST_STRING(cmps, "");
1129 TEST_STRING(cmps, "repz ");
1130 TEST_STRING(cmps, "repnz ");
1131}
e5918247 1132
3a27ad0b
FB		 1133/* VM86 test */
1134
1135static inline void set_bit(uint8_t *a, unsigned int bit)
1136{
1137 a[bit / 8] |= (1 << (bit % 8));
1138}
1139
1140static inline uint8_t *seg_to_linear(unsigned int seg, unsigned int reg)
1141{
1142 return (uint8_t *)((seg << 4) + (reg & 0xffff));
1143}
1144
1145static inline void pushw(struct vm86_regs *r, int val)
1146{
1147 r->esp = (r->esp & ~0xffff) | ((r->esp - 2) & 0xffff);
1148 *(uint16_t *)seg_to_linear(r->ss, r->esp) = val;
1149}
1150
1151#undef __syscall_return
1152#define __syscall_return(type, res) \
1153do { \
1154 return (type) (res); \
1155} while (0)
1156
1157_syscall2(int, vm86, int, func, struct vm86plus_struct *, v86)
1158
1159extern char vm86_code_start;
1160extern char vm86_code_end;
1161
1162#define VM86_CODE_CS 0x100
1163#define VM86_CODE_IP 0x100
1164
1165void test_vm86(void)
1166{
1167 struct vm86plus_struct ctx;
1168 struct vm86_regs *r;
1169 uint8_t *vm86_mem;
1170 int seg, ret;
1171
1172 vm86_mem = mmap((void *)0x00000000, 0x110000,
1173 PROT_WRITE | PROT_READ | PROT_EXEC,
1174 MAP_FIXED | MAP_ANON | MAP_PRIVATE, -1, 0);
1175 if (vm86_mem == MAP_FAILED) {
1176 printf("ERROR: could not map vm86 memory");
1177 return;
1178 }
1179 memset(&ctx, 0, sizeof(ctx));
1180
1181 /* init basic registers */
1182 r = &ctx.regs;
1183 r->eip = VM86_CODE_IP;
1184 r->esp = 0xfffe;
1185 seg = VM86_CODE_CS;
1186 r->cs = seg;
1187 r->ss = seg;
1188 r->ds = seg;
1189 r->es = seg;
1190 r->fs = seg;
1191 r->gs = seg;
1192 r->eflags = VIF_MASK;
1193
1194 /* move code to proper address. We use the same layout as a .com
1195 dos program. */
1196 memcpy(vm86_mem + (VM86_CODE_CS << 4) + VM86_CODE_IP,
1197 &vm86_code_start, &vm86_code_end - &vm86_code_start);
1198
1199 /* mark int 0x21 as being emulated */
1200 set_bit((uint8_t *)&ctx.int_revectored, 0x21);
1201
1202 for(;;) {
1203 ret = vm86(VM86_ENTER, &ctx);
1204 switch(VM86_TYPE(ret)) {
1205 case VM86_INTx:
1206 {
3ff0631e 1207 int int_num, ah, v;
3a27ad0b
FB		 1208
1209 int_num = VM86_ARG(ret);
1210 if (int_num != 0x21)
1211 goto unknown_int;
1212 ah = (r->eax >> 8) & 0xff;
1213 switch(ah) {
1214 case 0x00: /* exit */
1215 goto the_end;
1216 case 0x02: /* write char */
1217 {
1218 uint8_t c = r->edx;
1219 putchar(c);
1220 }
1221 break;
1222 case 0x09: /* write string */
1223 {
1224 uint8_t c, *ptr;
1225 ptr = seg_to_linear(r->ds, r->edx);
1226 for(;;) {
1227 c = *ptr++;
1228 if (c == '$')
1229 break;
1230 putchar(c);
1231 }
1232 r->eax = (r->eax & ~0xff) | '$';
1233 }
1234 break;
3ff0631e
FB		 1235 case 0xff: /* extension: write eflags number in edx */
1236 v = (int)r->edx;
1237#ifndef LINUX_VM86_IOPL_FIX
1238 v &= ~0x3000;
1239#endif
1240 printf("%08x\n", v);
3a27ad0b
FB		 1241 break;
1242 default:
1243 unknown_int:
1244 printf("unsupported int 0x%02x\n", int_num);
1245 goto the_end;
1246 }
1247 }
1248 break;
1249 case VM86_SIGNAL:
1250 /* a signal came, we just ignore that */
1251 break;
1252 case VM86_STI:
1253 break;
1254 default:
1255 printf("ERROR: unhandled vm86 return code (0x%x)\n", ret);
1256 goto the_end;
1257 }
1258 }
1259 the_end:
1260 printf("VM86 end\n");
1261 munmap(vm86_mem, 0x110000);
1262}
1263
1264/* exception tests */
1265#ifndef REG_EAX
1266#define REG_EAX EAX
1267#define REG_EBX EBX
1268#define REG_ECX ECX
1269#define REG_EDX EDX
1270#define REG_ESI ESI
1271#define REG_EDI EDI
1272#define REG_EBP EBP
1273#define REG_ESP ESP
1274#define REG_EIP EIP
1275#define REG_EFL EFL
1276#define REG_TRAPNO TRAPNO
1277#define REG_ERR ERR
1278#endif
1279
1280jmp_buf jmp_env;
3a27ad0b
FB		 1281int v1;
1282int tab[2];
1283
1284void sig_handler(int sig, siginfo_t *info, void *puc)
1285{
1286 struct ucontext *uc = puc;
1287
1288 printf("si_signo=%d si_errno=%d si_code=%d",
1289 info->si_signo, info->si_errno, info->si_code);
e3b32540
FB		 1290 printf(" si_addr=0x%08lx",
1291 (unsigned long)info->si_addr);
3a27ad0b
FB		 1292 printf("\n");
1293
1294 printf("trapno=0x%02x err=0x%08x",
1295 uc->uc_mcontext.gregs[REG_TRAPNO],
1296 uc->uc_mcontext.gregs[REG_ERR]);
e3b32540 1297 printf(" EIP=0x%08x", uc->uc_mcontext.gregs[REG_EIP]);
3a27ad0b
FB		 1298 printf("\n");
1299 longjmp(jmp_env, 1);
1300}
1301
1302void test_exceptions(void)
1303{
e3b32540 1304 struct modify_ldt_ldt_s ldt;
3a27ad0b
FB		 1305 struct sigaction act;
1306 volatile int val;
1307
1308 act.sa_sigaction = sig_handler;
1309 sigemptyset(&act.sa_mask);
1310 act.sa_flags = SA_SIGINFO;
1311 sigaction(SIGFPE, &act, NULL);
1312 sigaction(SIGILL, &act, NULL);
1313 sigaction(SIGSEGV, &act, NULL);
e3b32540 1314 sigaction(SIGBUS, &act, NULL);
3a27ad0b
FB		 1315 sigaction(SIGTRAP, &act, NULL);
1316
1317 /* test division by zero reporting */
e3b32540 1318 printf("DIVZ exception:\n");
3a27ad0b
FB		 1319 if (setjmp(jmp_env) == 0) {
1320 /* now divide by zero */
1321 v1 = 0;
1322 v1 = 2 / v1;
1323 }
1324
e3b32540 1325 printf("BOUND exception:\n");
3a27ad0b
FB		 1326 if (setjmp(jmp_env) == 0) {
1327 /* bound exception */
1328 tab[0] = 1;
1329 tab[1] = 10;
1330 asm volatile ("bound %0, %1" : : "r" (11), "m" (tab));
1331 }
1332
e3b32540
FB		 1333 printf("segment exceptions:\n");
1334 if (setjmp(jmp_env) == 0) {
1335 /* load an invalid segment */
1336 asm volatile ("movl %0, %%fs" : : "r" ((0x1234 << 3) | 1));
1337 }
1338 if (setjmp(jmp_env) == 0) {
1339 /* null data segment is valid */
1340 asm volatile ("movl %0, %%fs" : : "r" (3));
1341 /* null stack segment */
1342 asm volatile ("movl %0, %%ss" : : "r" (3));
1343 }
1344
1345 ldt.entry_number = 1;
1346 ldt.base_addr = (unsigned long)&seg_data1;
1347 ldt.limit = (sizeof(seg_data1) + 0xfff) >> 12;
1348 ldt.seg_32bit = 1;
1349 ldt.contents = MODIFY_LDT_CONTENTS_DATA;
1350 ldt.read_exec_only = 0;
1351 ldt.limit_in_pages = 1;
1352 ldt.seg_not_present = 1;
1353 ldt.useable = 1;
1354 modify_ldt(1, &ldt, sizeof(ldt)); /* write ldt entry */
1355
1356 if (setjmp(jmp_env) == 0) {
1357 /* segment not present */
1358 asm volatile ("movl %0, %%fs" : : "r" (MK_SEL(1)));
1359 }
1360
3a27ad0b 1361 /* test SEGV reporting */
e3b32540 1362 printf("PF exception:\n");
3a27ad0b 1363 if (setjmp(jmp_env) == 0) {
e3b32540 1364 val = 1;
ede28208
FB		 1365 /* we add a nop to test a weird PC retrieval case */
1366 asm volatile ("nop");
3a27ad0b
FB		 1367 /* now store in an invalid address */
1368 *(char *)0x1234 = 1;
1369 }
1370
1371 /* test SEGV reporting */
e3b32540 1372 printf("PF exception:\n");
3a27ad0b 1373 if (setjmp(jmp_env) == 0) {
e3b32540 1374 val = 1;
3a27ad0b
FB		 1375 /* read from an invalid address */
1376 v1 = *(char *)0x1234;
1377 }
1378
3a27ad0b
FB		 1379 /* test illegal instruction reporting */
1380 printf("UD2 exception:\n");
1381 if (setjmp(jmp_env) == 0) {
1382 /* now execute an invalid instruction */
1383 asm volatile("ud2");
1384 }
4120b61d
FB		 1385 printf("lock nop exception:\n");
1386 if (setjmp(jmp_env) == 0) {
1387 /* now execute an invalid instruction */
1388 asm volatile("lock nop");
1389 }
3a27ad0b
FB		 1390
1391 printf("INT exception:\n");
1392 if (setjmp(jmp_env) == 0) {
1393 asm volatile ("int $0xfd");
1394 }
e3b32540
FB		 1395 if (setjmp(jmp_env) == 0) {
1396 asm volatile ("int $0x01");
1397 }
1398 if (setjmp(jmp_env) == 0) {
1399 asm volatile (".byte 0xcd, 0x03");
1400 }
1401 if (setjmp(jmp_env) == 0) {
1402 asm volatile ("int $0x04");
1403 }
1404 if (setjmp(jmp_env) == 0) {
1405 asm volatile ("int $0x05");
1406 }
3a27ad0b
FB		 1407
1408 printf("INT3 exception:\n");
1409 if (setjmp(jmp_env) == 0) {
1410 asm volatile ("int3");
1411 }
1412
1413 printf("CLI exception:\n");
1414 if (setjmp(jmp_env) == 0) {
1415 asm volatile ("cli");
1416 }
1417
1418 printf("STI exception:\n");
1419 if (setjmp(jmp_env) == 0) {
1420 asm volatile ("cli");
1421 }
1422
1423 printf("INTO exception:\n");
1424 if (setjmp(jmp_env) == 0) {
1425 /* overflow exception */
1426 asm volatile ("addl $1, %0 ; into" : : "r" (0x7fffffff));
1427 }
1428
1429 printf("OUTB exception:\n");
1430 if (setjmp(jmp_env) == 0) {
1431 asm volatile ("outb %%al, %%dx" : : "d" (0x4321), "a" (0));
1432 }
1433
1434 printf("INB exception:\n");
1435 if (setjmp(jmp_env) == 0) {
1436 asm volatile ("inb %%dx, %%al" : "=a" (val) : "d" (0x4321));
1437 }
1438
1439 printf("REP OUTSB exception:\n");
1440 if (setjmp(jmp_env) == 0) {
1441 asm volatile ("rep outsb" : : "d" (0x4321), "S" (tab), "c" (1));
1442 }
1443
1444 printf("REP INSB exception:\n");
1445 if (setjmp(jmp_env) == 0) {
1446 asm volatile ("rep insb" : : "d" (0x4321), "D" (tab), "c" (1));
1447 }
1448
1449 printf("HLT exception:\n");
1450 if (setjmp(jmp_env) == 0) {
1451 asm volatile ("hlt");
1452 }
1453
1454 printf("single step exception:\n");
1455 val = 0;
1456 if (setjmp(jmp_env) == 0) {
1457 asm volatile ("pushf\n"
1458 "orl $0x00100, (%%esp)\n"
1459 "popf\n"
1460 "movl $0xabcd, %0\n"
1461 "movl $0x0, %0\n" : "=m" (val) : : "cc", "memory");
1462 }
1463 printf("val=0x%x\n", val);
1464}
1465
3ff0631e
FB		 1466/* specific precise single step test */
1467void sig_trap_handler(int sig, siginfo_t *info, void *puc)
1468{
1469 struct ucontext *uc = puc;
1470 printf("EIP=0x%08x\n", uc->uc_mcontext.gregs[REG_EIP]);
1471}
1472
1473const uint8_t sstep_buf1[4] = { 1, 2, 3, 4};
1474uint8_t sstep_buf2[4];
1475
1476void test_single_step(void)
1477{
1478 struct sigaction act;
1479 volatile int val;
1480 int i;
1481
1482 val = 0;
1483 act.sa_sigaction = sig_trap_handler;
1484 sigemptyset(&act.sa_mask);
1485 act.sa_flags = SA_SIGINFO;
1486 sigaction(SIGTRAP, &act, NULL);
1487 asm volatile ("pushf\n"
1488 "orl $0x00100, (%%esp)\n"
1489 "popf\n"
1490 "movl $0xabcd, %0\n"
1491
1492 /* jmp test */
1493 "movl $3, %%ecx\n"
1494 "1:\n"
1495 "addl $1, %0\n"
1496 "decl %%ecx\n"
1497 "jnz 1b\n"
1498
1499 /* movsb: the single step should stop at each movsb iteration */
1500 "movl $sstep_buf1, %%esi\n"
1501 "movl $sstep_buf2, %%edi\n"
1502 "movl $0, %%ecx\n"
1503 "rep movsb\n"
1504 "movl $3, %%ecx\n"
1505 "rep movsb\n"
1506 "movl $1, %%ecx\n"
1507 "rep movsb\n"
1508
1509 /* cmpsb: the single step should stop at each cmpsb iteration */
1510 "movl $sstep_buf1, %%esi\n"
1511 "movl $sstep_buf2, %%edi\n"
1512 "movl $0, %%ecx\n"
1513 "rep cmpsb\n"
1514 "movl $4, %%ecx\n"
1515 "rep cmpsb\n"
1516
1517 /* getpid() syscall: single step should skip one
1518 instruction */
1519 "movl $20, %%eax\n"
1520 "int $0x80\n"
1521 "movl $0, %%eax\n"
1522
1523 /* when modifying SS, trace is not done on the next
1524 instruction */
1525 "movl %%ss, %%ecx\n"
1526 "movl %%ecx, %%ss\n"
1527 "addl $1, %0\n"
1528 "movl $1, %%eax\n"
1529 "movl %%ecx, %%ss\n"
1530 "jmp 1f\n"
1531 "addl $1, %0\n"
1532 "1:\n"
1533 "movl $1, %%eax\n"
1534 "pushl %%ecx\n"
1535 "popl %%ss\n"
1536 "addl $1, %0\n"
1537 "movl $1, %%eax\n"
1538
1539 "pushf\n"
1540 "andl $~0x00100, (%%esp)\n"
1541 "popf\n"
1542 : "=m" (val)
1543 :
1544 : "cc", "memory", "eax", "ecx", "esi", "edi");
1545 printf("val=%d\n", val);
1546 for(i = 0; i < 4; i++)
1547 printf("sstep_buf2[%d] = %d\n", i, sstep_buf2[i]);
1548}
1549
3a27ad0b
FB		 1550/* self modifying code test */
1551uint8_t code[] = {
1552 0xb8, 0x1, 0x00, 0x00, 0x00, /* movl $1, %eax */
1553 0xc3, /* ret */
1554};
1555
d1fe2b24
FB		 1556typedef int FuncType(void);
1557
3a27ad0b
FB		 1558void test_self_modifying_code(void)
1559{
d1fe2b24 1560 int i;
3a27ad0b 1561
3a27ad0b 1562 printf("self modifying code:\n");
d1fe2b24
FB		 1563 printf("func1 = 0x%x\n", ((FuncType *)code)());
1564 for(i = 2; i <= 4; i++) {
1565 code[1] = i;
1566 printf("func%d = 0x%x\n", i, ((FuncType *)code)());
1567 }
3a27ad0b
FB		 1568}
1569
4d1135e4
FB		 1570static void *call_end __init_call = NULL;
1571
1572int main(int argc, char **argv)
1573{
1574 void **ptr;
1575 void (*func)(void);
4b74fe1f 1576
4d1135e4
FB		 1577 ptr = &call_start + 1;
1578 while (*ptr != NULL) {
1579 func = *ptr++;
1580 func();
1581 }
9d8e9c09 1582 test_bsx();
d57c4e01 1583 test_mul();
4d1135e4 1584 test_jcc();
9d8e9c09 1585 test_floats();
55480af8 1586 test_bcd();
1a9353d2 1587 test_xchg();
e1d4294a
FB		 1588 test_string();
1589 test_misc();
6dbad63e
FB		 1590 test_lea();
1591 test_segs();
e5918247 1592 test_code16();
3a27ad0b
FB		 1593 test_vm86();
1594 test_exceptions();
1595 test_self_modifying_code();
3ff0631e 1596 test_single_step();
4d1135e4
FB		 1597 return 0;
1598}
Qemu copy for testing