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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
03bfca94
FB		 615#define TEST_ENV(env, prefix)\
616{\
617 memset((env), 0xaa, sizeof(*(env)));\
618 asm("fld1\n"\
619 prefix "fnstenv %1\n"\
620 prefix "fldenv %1\n"\
e3e86d56 621 : "=t" (res) : "m" (*(env)));\
03bfca94
FB		 622 printf("res=%f\n", res);\
623 printf("fpuc=%04x fpus=%04x fptag=%04x\n",\
624 (env)->fpuc,\
625 (env)->fpus & 0xff00,\
626 (env)->fptag);\
627 memset((env), 0xaa, sizeof(*(env)));\
628 asm("fld1\n"\
629 prefix "fnsave %1\n"\
630 prefix "frstor %1\n"\
e3e86d56 631 : "=t" (res) : "m" (*(env)));\
03bfca94
FB		 632 printf("res=%f\n", res);\
633 printf("fpuc=%04x fpus=%04x fptag=%04x\n",\
634 (env)->fpuc,\
635 (env)->fpus & 0xff00,\
636 (env)->fptag);\
637 printf("ST(0) = %Lf\n",\
638 (env)->fpregs[0]);\
639}
640
641void test_fenv(void)
642{
643 struct __attribute__((packed)) {
644 uint16_t fpuc;
645 uint16_t dummy1;
646 uint16_t fpus;
647 uint16_t dummy2;
648 uint16_t fptag;
649 uint16_t dummy3;
650 uint32_t ignored[4];
651 long double fpregs[8];
652 } float_env32;
653 struct __attribute__((packed)) {
654 uint16_t fpuc;
655 uint16_t fpus;
656 uint16_t fptag;
657 uint16_t ignored[4];
658 long double fpregs[8];
659 } float_env16;
660 double res;
661
662 TEST_ENV(&float_env16, "data16 ");
663 TEST_ENV(&float_env32, "");
664}
665
75175024
FB		 666
667#define TEST_FCMOV(a, b, eflags, CC)\
668{\
669 double res;\
670 asm("push %3\n"\
671 "popf\n"\
672 "fcmov" CC " %2, %0\n"\
673 : "=t" (res)\
674 : "0" (a), "u" (b), "g" (eflags));\
675 printf("fcmov%s eflags=0x%04x-> %f\n", \
676 CC, eflags, res);\
677}
678
679void test_fcmov(void)
680{
681 double a, b;
682 int eflags, i;
683
684 a = 1.0;
685 b = 2.0;
686 for(i = 0; i < 4; i++) {
687 eflags = 0;
688 if (i & 1)
689 eflags |= CC_C;
690 if (i & 2)
691 eflags |= CC_Z;
692 TEST_FCMOV(a, b, eflags, "b");
693 TEST_FCMOV(a, b, eflags, "e");
694 TEST_FCMOV(a, b, eflags, "be");
695 TEST_FCMOV(a, b, eflags, "nb");
696 TEST_FCMOV(a, b, eflags, "ne");
697 TEST_FCMOV(a, b, eflags, "nbe");
698 }
699 TEST_FCMOV(a, b, 0, "u");
9cdf757f
FB		 700 TEST_FCMOV(a, b, CC_P, "u");
701 TEST_FCMOV(a, b, 0, "nu");
75175024
FB		 702 TEST_FCMOV(a, b, CC_P, "nu");
703}
704
9d8e9c09
FB		 705void test_floats(void)
706{
707 test_fops(2, 3);
708 test_fops(1.4, -5);
709 test_fcmp(2, -1);
710 test_fcmp(2, 2);
711 test_fcmp(2, 3);
ea768640
FB		 712 test_fcvt(0.5);
713 test_fcvt(-0.5);
9d8e9c09
FB		 714 test_fcvt(1.0/7.0);
715 test_fcvt(-1.0/9.0);
ea768640
FB		 716 test_fcvt(32768);
717 test_fcvt(-1e20);
9d8e9c09 718 test_fconst();
c5e9815d
FB		 719 test_fbcd(1234567890123456);
720 test_fbcd(-123451234567890);
03bfca94 721 test_fenv();
75175024
FB		 722 if (TEST_CMOV) {
723 test_fcmov();
724 }
9d8e9c09 725}
4b74fe1f 726
55480af8
FB		 727/**********************************************/
728
729#define TEST_BCD(op, op0, cc_in, cc_mask)\
730{\
731 int res, flags;\
732 res = op0;\
733 flags = cc_in;\
734 asm ("push %3\n\t"\
735 "popf\n\t"\
736 #op "\n\t"\
737 "pushf\n\t"\
738 "popl %1\n\t"\
739 : "=a" (res), "=g" (flags)\
740 : "0" (res), "1" (flags));\
741 printf("%-10s A=%08x R=%08x CCIN=%04x CC=%04x\n",\
742 #op, op0, res, cc_in, flags & cc_mask);\
743}
744
745void test_bcd(void)
746{
747 TEST_BCD(daa, 0x12340503, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
748 TEST_BCD(daa, 0x12340506, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
749 TEST_BCD(daa, 0x12340507, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
750 TEST_BCD(daa, 0x12340559, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
751 TEST_BCD(daa, 0x12340560, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
752 TEST_BCD(daa, 0x1234059f, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
753 TEST_BCD(daa, 0x123405a0, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
754 TEST_BCD(daa, 0x12340503, 0, (CC_C | CC_P | CC_Z | CC_S | CC_A));
755 TEST_BCD(daa, 0x12340506, 0, (CC_C | CC_P | CC_Z | CC_S | CC_A));
756 TEST_BCD(daa, 0x12340503, CC_C, (CC_C | CC_P | CC_Z | CC_S | CC_A));
757 TEST_BCD(daa, 0x12340506, CC_C, (CC_C | CC_P | CC_Z | CC_S | CC_A));
758 TEST_BCD(daa, 0x12340503, CC_C | CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
759 TEST_BCD(daa, 0x12340506, CC_C | CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
760
761 TEST_BCD(das, 0x12340503, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
762 TEST_BCD(das, 0x12340506, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
763 TEST_BCD(das, 0x12340507, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
764 TEST_BCD(das, 0x12340559, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
765 TEST_BCD(das, 0x12340560, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
766 TEST_BCD(das, 0x1234059f, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
767 TEST_BCD(das, 0x123405a0, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
768 TEST_BCD(das, 0x12340503, 0, (CC_C | CC_P | CC_Z | CC_S | CC_A));
769 TEST_BCD(das, 0x12340506, 0, (CC_C | CC_P | CC_Z | CC_S | CC_A));
770 TEST_BCD(das, 0x12340503, CC_C, (CC_C | CC_P | CC_Z | CC_S | CC_A));
771 TEST_BCD(das, 0x12340506, CC_C, (CC_C | CC_P | CC_Z | CC_S | CC_A));
772 TEST_BCD(das, 0x12340503, CC_C | CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
773 TEST_BCD(das, 0x12340506, CC_C | CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
774
775 TEST_BCD(aaa, 0x12340205, CC_A, (CC_C | CC_A));
776 TEST_BCD(aaa, 0x12340306, CC_A, (CC_C | CC_A));
777 TEST_BCD(aaa, 0x1234040a, CC_A, (CC_C | CC_A));
778 TEST_BCD(aaa, 0x123405fa, CC_A, (CC_C | CC_A));
779 TEST_BCD(aaa, 0x12340205, 0, (CC_C | CC_A));
780 TEST_BCD(aaa, 0x12340306, 0, (CC_C | CC_A));
781 TEST_BCD(aaa, 0x1234040a, 0, (CC_C | CC_A));
782 TEST_BCD(aaa, 0x123405fa, 0, (CC_C | CC_A));
783
784 TEST_BCD(aas, 0x12340205, CC_A, (CC_C | CC_A));
785 TEST_BCD(aas, 0x12340306, CC_A, (CC_C | CC_A));
786 TEST_BCD(aas, 0x1234040a, CC_A, (CC_C | CC_A));
787 TEST_BCD(aas, 0x123405fa, CC_A, (CC_C | CC_A));
788 TEST_BCD(aas, 0x12340205, 0, (CC_C | CC_A));
789 TEST_BCD(aas, 0x12340306, 0, (CC_C | CC_A));
790 TEST_BCD(aas, 0x1234040a, 0, (CC_C | CC_A));
791 TEST_BCD(aas, 0x123405fa, 0, (CC_C | CC_A));
792
793 TEST_BCD(aam, 0x12340547, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_O | CC_A));
794 TEST_BCD(aad, 0x12340407, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_O | CC_A));
795}
796
e5918247
FB		 797#define TEST_XCHG(op, size, opconst)\
798{\
799 int op0, op1;\
800 op0 = 0x12345678;\
801 op1 = 0xfbca7654;\
802 asm(#op " %" size "0, %" size "1" \
803 : "=q" (op0), opconst (op1) \
804 : "0" (op0), "1" (op1));\
805 printf("%-10s A=%08x B=%08x\n",\
806 #op, op0, op1);\
807}
808
809#define TEST_CMPXCHG(op, size, opconst, eax)\
810{\
811 int op0, op1;\
812 op0 = 0x12345678;\
813 op1 = 0xfbca7654;\
814 asm(#op " %" size "0, %" size "1" \
815 : "=q" (op0), opconst (op1) \
816 : "0" (op0), "1" (op1), "a" (eax));\
817 printf("%-10s EAX=%08x A=%08x C=%08x\n",\
818 #op, eax, op0, op1);\
819}
820
821void test_xchg(void)
822{
823 TEST_XCHG(xchgl, "", "=q");
824 TEST_XCHG(xchgw, "w", "=q");
825 TEST_XCHG(xchgb, "b", "=q");
826
827 TEST_XCHG(xchgl, "", "=m");
828 TEST_XCHG(xchgw, "w", "=m");
829 TEST_XCHG(xchgb, "b", "=m");
830
831 TEST_XCHG(xaddl, "", "=q");
832 TEST_XCHG(xaddw, "w", "=q");
833 TEST_XCHG(xaddb, "b", "=q");
834
d575b78a
FB		 835 {
836 int res;
837 res = 0x12345678;
838 asm("xaddl %1, %0" : "=r" (res) : "0" (res));
839 printf("xaddl same res=%08x\n", res);
840 }
841
e5918247
FB		 842 TEST_XCHG(xaddl, "", "=m");
843 TEST_XCHG(xaddw, "w", "=m");
844 TEST_XCHG(xaddb, "b", "=m");
845
846 TEST_CMPXCHG(cmpxchgl, "", "=q", 0xfbca7654);
847 TEST_CMPXCHG(cmpxchgw, "w", "=q", 0xfbca7654);
848 TEST_CMPXCHG(cmpxchgb, "b", "=q", 0xfbca7654);
849
850 TEST_CMPXCHG(cmpxchgl, "", "=q", 0xfffefdfc);
851 TEST_CMPXCHG(cmpxchgw, "w", "=q", 0xfffefdfc);
852 TEST_CMPXCHG(cmpxchgb, "b", "=q", 0xfffefdfc);
853
854 TEST_CMPXCHG(cmpxchgl, "", "=m", 0xfbca7654);
855 TEST_CMPXCHG(cmpxchgw, "w", "=m", 0xfbca7654);
856 TEST_CMPXCHG(cmpxchgb, "b", "=m", 0xfbca7654);
857
858 TEST_CMPXCHG(cmpxchgl, "", "=m", 0xfffefdfc);
859 TEST_CMPXCHG(cmpxchgw, "w", "=m", 0xfffefdfc);
860 TEST_CMPXCHG(cmpxchgb, "b", "=m", 0xfffefdfc);
d575b78a
FB		 861
862 {
863 uint64_t op0, op1, op2;
864 int i, eflags;
865
866 for(i = 0; i < 2; i++) {
867 op0 = 0x123456789abcd;
868 if (i == 0)
869 op1 = 0xfbca765423456;
870 else
871 op1 = op0;
872 op2 = 0x6532432432434;
873 asm("cmpxchg8b %1\n"
874 "pushf\n"
875 "popl %2\n"
876 : "=A" (op0), "=m" (op1), "=g" (eflags)
877 : "0" (op0), "m" (op1), "b" ((int)op2), "c" ((int)(op2 >> 32)));
878 printf("cmpxchg8b: op0=%016llx op1=%016llx CC=%02x\n",
879 op0, op1, eflags & CC_Z);
880 }
881 }
e5918247
FB		 882}
883
6dbad63e
FB		 884/**********************************************/
885/* segmentation tests */
886
887#include <asm/ldt.h>
888#include <linux/unistd.h>
889
890_syscall3(int, modify_ldt, int, func, void *, ptr, unsigned long, bytecount)
891
892uint8_t seg_data1[4096];
893uint8_t seg_data2[4096];
894
e5918247 895#define MK_SEL(n) (((n) << 3) | 7)
6dbad63e 896
288426fe
FB		 897#define TEST_LR(op, size, seg, mask)\
898{\
899 int res, res2;\
900 res = 0x12345678;\
901 asm (op " %" size "2, %" size "0\n" \
902 "movl $0, %1\n"\
903 "jnz 1f\n"\
904 "movl $1, %1\n"\
905 "1:\n"\
906 : "=r" (res), "=r" (res2) : "m" (seg), "0" (res));\
907 printf(op ": Z=%d %08x\n", res2, res & ~(mask));\
908}
909
6dbad63e
FB		 910/* NOTE: we use Linux modify_ldt syscall */
911void test_segs(void)
912{
913 struct modify_ldt_ldt_s ldt;
914 long long ldt_table[3];
04369ff2 915 int res, res2;
6dbad63e 916 char tmp;
e1d4294a
FB		 917 struct {
918 uint32_t offset;
919 uint16_t seg;
920 } __attribute__((packed)) segoff;
6dbad63e
FB		 921
922 ldt.entry_number = 1;
923 ldt.base_addr = (unsigned long)&seg_data1;
924 ldt.limit = (sizeof(seg_data1) + 0xfff) >> 12;
925 ldt.seg_32bit = 1;
926 ldt.contents = MODIFY_LDT_CONTENTS_DATA;
927 ldt.read_exec_only = 0;
928 ldt.limit_in_pages = 1;
929 ldt.seg_not_present = 0;
930 ldt.useable = 1;
931 modify_ldt(1, &ldt, sizeof(ldt)); /* write ldt entry */
932
933 ldt.entry_number = 2;
934 ldt.base_addr = (unsigned long)&seg_data2;
935 ldt.limit = (sizeof(seg_data2) + 0xfff) >> 12;
936 ldt.seg_32bit = 1;
937 ldt.contents = MODIFY_LDT_CONTENTS_DATA;
938 ldt.read_exec_only = 0;
939 ldt.limit_in_pages = 1;
940 ldt.seg_not_present = 0;
941 ldt.useable = 1;
942 modify_ldt(1, &ldt, sizeof(ldt)); /* write ldt entry */
943
944 modify_ldt(0, &ldt_table, sizeof(ldt_table)); /* read ldt entries */
04369ff2
FB		 945#if 0
946 {
947 int i;
948 for(i=0;i<3;i++)
949 printf("%d: %016Lx\n", i, ldt_table[i]);
950 }
951#endif
6dbad63e
FB		 952 /* do some tests with fs or gs */
953 asm volatile ("movl %0, %%fs" : : "r" (MK_SEL(1)));
6dbad63e
FB		 954
955 seg_data1[1] = 0xaa;
956 seg_data2[1] = 0x55;
957
958 asm volatile ("fs movzbl 0x1, %0" : "=r" (res));
959 printf("FS[1] = %02x\n", res);
960
070893f4
FB		 961 asm volatile ("pushl %%gs\n"
962 "movl %1, %%gs\n"
963 "gs movzbl 0x1, %0\n"
964 "popl %%gs\n"
965 : "=r" (res)
966 : "r" (MK_SEL(2)));
6dbad63e
FB		 967 printf("GS[1] = %02x\n", res);
968
969 /* tests with ds/ss (implicit segment case) */
970 tmp = 0xa5;
971 asm volatile ("pushl %%ebp\n\t"
972 "pushl %%ds\n\t"
973 "movl %2, %%ds\n\t"
974 "movl %3, %%ebp\n\t"
975 "movzbl 0x1, %0\n\t"
976 "movzbl (%%ebp), %1\n\t"
977 "popl %%ds\n\t"
978 "popl %%ebp\n\t"
979 : "=r" (res), "=r" (res2)
980 : "r" (MK_SEL(1)), "r" (&tmp));
981 printf("DS[1] = %02x\n", res);
982 printf("SS[tmp] = %02x\n", res2);
e1d4294a
FB		 983
984 segoff.seg = MK_SEL(2);
985 segoff.offset = 0xabcdef12;
986 asm volatile("lfs %2, %0\n\t"
987 "movl %%fs, %1\n\t"
988 : "=r" (res), "=g" (res2)
989 : "m" (segoff));
990 printf("FS:reg = %04x:%08x\n", res2, res);
288426fe
FB		 991
992 TEST_LR("larw", "w", MK_SEL(2), 0x0100);
993 TEST_LR("larl", "", MK_SEL(2), 0x0100);
994 TEST_LR("lslw", "w", MK_SEL(2), 0);
995 TEST_LR("lsll", "", MK_SEL(2), 0);
996
997 TEST_LR("larw", "w", 0xfff8, 0);
998 TEST_LR("larl", "", 0xfff8, 0);
999 TEST_LR("lslw", "w", 0xfff8, 0);
1000 TEST_LR("lsll", "", 0xfff8, 0);
6dbad63e 1001}
55480af8 1002
e5918247
FB		 1003/* 16 bit code test */
1004extern char code16_start, code16_end;
1005extern char code16_func1;
1006extern char code16_func2;
1007extern char code16_func3;
a300e691 1008
e5918247 1009void test_code16(void)
1a9353d2 1010{
e5918247
FB		 1011 struct modify_ldt_ldt_s ldt;
1012 int res, res2;
a300e691 1013
e5918247
FB		 1014 /* build a code segment */
1015 ldt.entry_number = 1;
1016 ldt.base_addr = (unsigned long)&code16_start;
1017 ldt.limit = &code16_end - &code16_start;
1018 ldt.seg_32bit = 0;
1019 ldt.contents = MODIFY_LDT_CONTENTS_CODE;
1020 ldt.read_exec_only = 0;
1021 ldt.limit_in_pages = 0;
1022 ldt.seg_not_present = 0;
1023 ldt.useable = 1;
1024 modify_ldt(1, &ldt, sizeof(ldt)); /* write ldt entry */
a300e691 1025
e5918247
FB		 1026 /* call the first function */
1027 asm volatile ("lcall %1, %2"
1028 : "=a" (res)
1029 : "i" (MK_SEL(1)), "i" (&code16_func1): "memory", "cc");
1030 printf("func1() = 0x%08x\n", res);
1031 asm volatile ("lcall %2, %3"
1032 : "=a" (res), "=c" (res2)
1033 : "i" (MK_SEL(1)), "i" (&code16_func2): "memory", "cc");
1034 printf("func2() = 0x%08x spdec=%d\n", res, res2);
1035 asm volatile ("lcall %1, %2"
1036 : "=a" (res)
1037 : "i" (MK_SEL(1)), "i" (&code16_func3): "memory", "cc");
1038 printf("func3() = 0x%08x\n", res);
1a9353d2
FB		 1039}
1040
dd3587f3
FB		 1041extern char func_lret32;
1042extern char func_iret32;
1043
e1d4294a
FB		 1044void test_misc(void)
1045{
1046 char table[256];
1047 int res, i;
1048
1049 for(i=0;i<256;i++) table[i] = 256 - i;
1050 res = 0x12345678;
1051 asm ("xlat" : "=a" (res) : "b" (table), "0" (res));
1052 printf("xlat: EAX=%08x\n", res);
dd3587f3
FB		 1053
1054 asm volatile ("pushl %%cs ; call %1"
1055 : "=a" (res)
1056 : "m" (func_lret32): "memory", "cc");
1057 printf("func_lret32=%x\n", res);
1058
1059 asm volatile ("pushfl ; pushl %%cs ; call %1"
1060 : "=a" (res)
1061 : "m" (func_iret32): "memory", "cc");
1062 printf("func_iret32=%x\n", res);
1063
1064 /* specific popl test */
1065 asm volatile ("pushl $12345432 ; pushl $0x9abcdef ; popl (%%esp) ; popl %0"
1066 : "=g" (res));
1067 printf("popl esp=%x\n", res);
b2b5fb22
FB		 1068
1069 /* specific popw test */
1070 asm volatile ("pushl $12345432 ; pushl $0x9abcdef ; popw (%%esp) ; addl $2, %%esp ; popl %0"
1071 : "=g" (res));
1072 printf("popw esp=%x\n", res);
e1d4294a
FB		 1073}
1074
1075uint8_t str_buffer[4096];
1076
1077#define TEST_STRING1(OP, size, DF, REP)\
1078{\
1079 int esi, edi, eax, ecx, eflags;\
1080\
1081 esi = (long)(str_buffer + sizeof(str_buffer) / 2);\
1082 edi = (long)(str_buffer + sizeof(str_buffer) / 2) + 16;\
1083 eax = 0x12345678;\
1084 ecx = 17;\
1085\
1086 asm volatile ("pushl $0\n\t"\
1087 "popf\n\t"\
1088 DF "\n\t"\
1089 REP #OP size "\n\t"\
1090 "cld\n\t"\
1091 "pushf\n\t"\
1092 "popl %4\n\t"\
1093 : "=S" (esi), "=D" (edi), "=a" (eax), "=c" (ecx), "=g" (eflags)\
1094 : "0" (esi), "1" (edi), "2" (eax), "3" (ecx));\
1095 printf("%-10s ESI=%08x EDI=%08x EAX=%08x ECX=%08x EFL=%04x\n",\
1096 REP #OP size, esi, edi, eax, ecx,\
1097 eflags & (CC_C | CC_P | CC_Z | CC_S | CC_O | CC_A));\
1098}
1099
1100#define TEST_STRING(OP, REP)\
1101 TEST_STRING1(OP, "b", "", REP);\
1102 TEST_STRING1(OP, "w", "", REP);\
1103 TEST_STRING1(OP, "l", "", REP);\
1104 TEST_STRING1(OP, "b", "std", REP);\
1105 TEST_STRING1(OP, "w", "std", REP);\
1106 TEST_STRING1(OP, "l", "std", REP)
1107
1108void test_string(void)
1109{
1110 int i;
1111 for(i = 0;i < sizeof(str_buffer); i++)
1112 str_buffer[i] = i + 0x56;
1113 TEST_STRING(stos, "");
1114 TEST_STRING(stos, "rep ");
1115 TEST_STRING(lods, ""); /* to verify stos */
1116 TEST_STRING(lods, "rep ");
1117 TEST_STRING(movs, "");
1118 TEST_STRING(movs, "rep ");
1119 TEST_STRING(lods, ""); /* to verify stos */
1120
1121 /* XXX: better tests */
1122 TEST_STRING(scas, "");
1123 TEST_STRING(scas, "repz ");
1124 TEST_STRING(scas, "repnz ");
1125 TEST_STRING(cmps, "");
1126 TEST_STRING(cmps, "repz ");
1127 TEST_STRING(cmps, "repnz ");
1128}
e5918247 1129
3a27ad0b
FB		 1130/* VM86 test */
1131
1132static inline void set_bit(uint8_t *a, unsigned int bit)
1133{
1134 a[bit / 8] |= (1 << (bit % 8));
1135}
1136
1137static inline uint8_t *seg_to_linear(unsigned int seg, unsigned int reg)
1138{
1139 return (uint8_t *)((seg << 4) + (reg & 0xffff));
1140}
1141
1142static inline void pushw(struct vm86_regs *r, int val)
1143{
1144 r->esp = (r->esp & ~0xffff) | ((r->esp - 2) & 0xffff);
1145 *(uint16_t *)seg_to_linear(r->ss, r->esp) = val;
1146}
1147
1148#undef __syscall_return
1149#define __syscall_return(type, res) \
1150do { \
1151 return (type) (res); \
1152} while (0)
1153
1154_syscall2(int, vm86, int, func, struct vm86plus_struct *, v86)
1155
1156extern char vm86_code_start;
1157extern char vm86_code_end;
1158
1159#define VM86_CODE_CS 0x100
1160#define VM86_CODE_IP 0x100
1161
1162void test_vm86(void)
1163{
1164 struct vm86plus_struct ctx;
1165 struct vm86_regs *r;
1166 uint8_t *vm86_mem;
1167 int seg, ret;
1168
1169 vm86_mem = mmap((void *)0x00000000, 0x110000,
1170 PROT_WRITE | PROT_READ | PROT_EXEC,
1171 MAP_FIXED | MAP_ANON | MAP_PRIVATE, -1, 0);
1172 if (vm86_mem == MAP_FAILED) {
1173 printf("ERROR: could not map vm86 memory");
1174 return;
1175 }
1176 memset(&ctx, 0, sizeof(ctx));
1177
1178 /* init basic registers */
1179 r = &ctx.regs;
1180 r->eip = VM86_CODE_IP;
1181 r->esp = 0xfffe;
1182 seg = VM86_CODE_CS;
1183 r->cs = seg;
1184 r->ss = seg;
1185 r->ds = seg;
1186 r->es = seg;
1187 r->fs = seg;
1188 r->gs = seg;
1189 r->eflags = VIF_MASK;
1190
1191 /* move code to proper address. We use the same layout as a .com
1192 dos program. */
1193 memcpy(vm86_mem + (VM86_CODE_CS << 4) + VM86_CODE_IP,
1194 &vm86_code_start, &vm86_code_end - &vm86_code_start);
1195
1196 /* mark int 0x21 as being emulated */
1197 set_bit((uint8_t *)&ctx.int_revectored, 0x21);
1198
1199 for(;;) {
1200 ret = vm86(VM86_ENTER, &ctx);
1201 switch(VM86_TYPE(ret)) {
1202 case VM86_INTx:
1203 {
3ff0631e 1204 int int_num, ah, v;
3a27ad0b
FB		 1205
1206 int_num = VM86_ARG(ret);
1207 if (int_num != 0x21)
1208 goto unknown_int;
1209 ah = (r->eax >> 8) & 0xff;
1210 switch(ah) {
1211 case 0x00: /* exit */
1212 goto the_end;
1213 case 0x02: /* write char */
1214 {
1215 uint8_t c = r->edx;
1216 putchar(c);
1217 }
1218 break;
1219 case 0x09: /* write string */
1220 {
1221 uint8_t c, *ptr;
1222 ptr = seg_to_linear(r->ds, r->edx);
1223 for(;;) {
1224 c = *ptr++;
1225 if (c == '$')
1226 break;
1227 putchar(c);
1228 }
1229 r->eax = (r->eax & ~0xff) | '$';
1230 }
1231 break;
3ff0631e
FB		 1232 case 0xff: /* extension: write eflags number in edx */
1233 v = (int)r->edx;
1234#ifndef LINUX_VM86_IOPL_FIX
1235 v &= ~0x3000;
1236#endif
1237 printf("%08x\n", v);
3a27ad0b
FB		 1238 break;
1239 default:
1240 unknown_int:
1241 printf("unsupported int 0x%02x\n", int_num);
1242 goto the_end;
1243 }
1244 }
1245 break;
1246 case VM86_SIGNAL:
1247 /* a signal came, we just ignore that */
1248 break;
1249 case VM86_STI:
1250 break;
1251 default:
1252 printf("ERROR: unhandled vm86 return code (0x%x)\n", ret);
1253 goto the_end;
1254 }
1255 }
1256 the_end:
1257 printf("VM86 end\n");
1258 munmap(vm86_mem, 0x110000);
1259}
1260
1261/* exception tests */
1262#ifndef REG_EAX
1263#define REG_EAX EAX
1264#define REG_EBX EBX
1265#define REG_ECX ECX
1266#define REG_EDX EDX
1267#define REG_ESI ESI
1268#define REG_EDI EDI
1269#define REG_EBP EBP
1270#define REG_ESP ESP
1271#define REG_EIP EIP
1272#define REG_EFL EFL
1273#define REG_TRAPNO TRAPNO
1274#define REG_ERR ERR
1275#endif
1276
1277jmp_buf jmp_env;
3a27ad0b
FB		 1278int v1;
1279int tab[2];
1280
1281void sig_handler(int sig, siginfo_t *info, void *puc)
1282{
1283 struct ucontext *uc = puc;
1284
1285 printf("si_signo=%d si_errno=%d si_code=%d",
1286 info->si_signo, info->si_errno, info->si_code);
e3b32540
FB		 1287 printf(" si_addr=0x%08lx",
1288 (unsigned long)info->si_addr);
3a27ad0b
FB		 1289 printf("\n");
1290
1291 printf("trapno=0x%02x err=0x%08x",
1292 uc->uc_mcontext.gregs[REG_TRAPNO],
1293 uc->uc_mcontext.gregs[REG_ERR]);
e3b32540 1294 printf(" EIP=0x%08x", uc->uc_mcontext.gregs[REG_EIP]);
3a27ad0b
FB		 1295 printf("\n");
1296 longjmp(jmp_env, 1);
1297}
1298
1299void test_exceptions(void)
1300{
e3b32540 1301 struct modify_ldt_ldt_s ldt;
3a27ad0b
FB		 1302 struct sigaction act;
1303 volatile int val;
1304
1305 act.sa_sigaction = sig_handler;
1306 sigemptyset(&act.sa_mask);
1307 act.sa_flags = SA_SIGINFO;
1308 sigaction(SIGFPE, &act, NULL);
1309 sigaction(SIGILL, &act, NULL);
1310 sigaction(SIGSEGV, &act, NULL);
e3b32540 1311 sigaction(SIGBUS, &act, NULL);
3a27ad0b
FB		 1312 sigaction(SIGTRAP, &act, NULL);
1313
1314 /* test division by zero reporting */
e3b32540 1315 printf("DIVZ exception:\n");
3a27ad0b
FB		 1316 if (setjmp(jmp_env) == 0) {
1317 /* now divide by zero */
1318 v1 = 0;
1319 v1 = 2 / v1;
1320 }
1321
e3b32540 1322 printf("BOUND exception:\n");
3a27ad0b
FB		 1323 if (setjmp(jmp_env) == 0) {
1324 /* bound exception */
1325 tab[0] = 1;
1326 tab[1] = 10;
1327 asm volatile ("bound %0, %1" : : "r" (11), "m" (tab));
1328 }
1329
e3b32540
FB		 1330 printf("segment exceptions:\n");
1331 if (setjmp(jmp_env) == 0) {
1332 /* load an invalid segment */
1333 asm volatile ("movl %0, %%fs" : : "r" ((0x1234 << 3) | 1));
1334 }
1335 if (setjmp(jmp_env) == 0) {
1336 /* null data segment is valid */
1337 asm volatile ("movl %0, %%fs" : : "r" (3));
1338 /* null stack segment */
1339 asm volatile ("movl %0, %%ss" : : "r" (3));
1340 }
1341
1342 ldt.entry_number = 1;
1343 ldt.base_addr = (unsigned long)&seg_data1;
1344 ldt.limit = (sizeof(seg_data1) + 0xfff) >> 12;
1345 ldt.seg_32bit = 1;
1346 ldt.contents = MODIFY_LDT_CONTENTS_DATA;
1347 ldt.read_exec_only = 0;
1348 ldt.limit_in_pages = 1;
1349 ldt.seg_not_present = 1;
1350 ldt.useable = 1;
1351 modify_ldt(1, &ldt, sizeof(ldt)); /* write ldt entry */
1352
1353 if (setjmp(jmp_env) == 0) {
1354 /* segment not present */
1355 asm volatile ("movl %0, %%fs" : : "r" (MK_SEL(1)));
1356 }
1357
3a27ad0b 1358 /* test SEGV reporting */
e3b32540 1359 printf("PF exception:\n");
3a27ad0b 1360 if (setjmp(jmp_env) == 0) {
e3b32540 1361 val = 1;
ede28208
FB		 1362 /* we add a nop to test a weird PC retrieval case */
1363 asm volatile ("nop");
3a27ad0b
FB		 1364 /* now store in an invalid address */
1365 *(char *)0x1234 = 1;
1366 }
1367
1368 /* test SEGV reporting */
e3b32540 1369 printf("PF exception:\n");
3a27ad0b 1370 if (setjmp(jmp_env) == 0) {
e3b32540 1371 val = 1;
3a27ad0b
FB		 1372 /* read from an invalid address */
1373 v1 = *(char *)0x1234;
1374 }
1375
3a27ad0b
FB		 1376 /* test illegal instruction reporting */
1377 printf("UD2 exception:\n");
1378 if (setjmp(jmp_env) == 0) {
1379 /* now execute an invalid instruction */
1380 asm volatile("ud2");
1381 }
1382
1383 printf("INT exception:\n");
1384 if (setjmp(jmp_env) == 0) {
1385 asm volatile ("int $0xfd");
1386 }
e3b32540
FB		 1387 if (setjmp(jmp_env) == 0) {
1388 asm volatile ("int $0x01");
1389 }
1390 if (setjmp(jmp_env) == 0) {
1391 asm volatile (".byte 0xcd, 0x03");
1392 }
1393 if (setjmp(jmp_env) == 0) {
1394 asm volatile ("int $0x04");
1395 }
1396 if (setjmp(jmp_env) == 0) {
1397 asm volatile ("int $0x05");
1398 }
3a27ad0b
FB		 1399
1400 printf("INT3 exception:\n");
1401 if (setjmp(jmp_env) == 0) {
1402 asm volatile ("int3");
1403 }
1404
1405 printf("CLI exception:\n");
1406 if (setjmp(jmp_env) == 0) {
1407 asm volatile ("cli");
1408 }
1409
1410 printf("STI exception:\n");
1411 if (setjmp(jmp_env) == 0) {
1412 asm volatile ("cli");
1413 }
1414
1415 printf("INTO exception:\n");
1416 if (setjmp(jmp_env) == 0) {
1417 /* overflow exception */
1418 asm volatile ("addl $1, %0 ; into" : : "r" (0x7fffffff));
1419 }
1420
1421 printf("OUTB exception:\n");
1422 if (setjmp(jmp_env) == 0) {
1423 asm volatile ("outb %%al, %%dx" : : "d" (0x4321), "a" (0));
1424 }
1425
1426 printf("INB exception:\n");
1427 if (setjmp(jmp_env) == 0) {
1428 asm volatile ("inb %%dx, %%al" : "=a" (val) : "d" (0x4321));
1429 }
1430
1431 printf("REP OUTSB exception:\n");
1432 if (setjmp(jmp_env) == 0) {
1433 asm volatile ("rep outsb" : : "d" (0x4321), "S" (tab), "c" (1));
1434 }
1435
1436 printf("REP INSB exception:\n");
1437 if (setjmp(jmp_env) == 0) {
1438 asm volatile ("rep insb" : : "d" (0x4321), "D" (tab), "c" (1));
1439 }
1440
1441 printf("HLT exception:\n");
1442 if (setjmp(jmp_env) == 0) {
1443 asm volatile ("hlt");
1444 }
1445
1446 printf("single step exception:\n");
1447 val = 0;
1448 if (setjmp(jmp_env) == 0) {
1449 asm volatile ("pushf\n"
1450 "orl $0x00100, (%%esp)\n"
1451 "popf\n"
1452 "movl $0xabcd, %0\n"
1453 "movl $0x0, %0\n" : "=m" (val) : : "cc", "memory");
1454 }
1455 printf("val=0x%x\n", val);
1456}
1457
3ff0631e
FB		 1458/* specific precise single step test */
1459void sig_trap_handler(int sig, siginfo_t *info, void *puc)
1460{
1461 struct ucontext *uc = puc;
1462 printf("EIP=0x%08x\n", uc->uc_mcontext.gregs[REG_EIP]);
1463}
1464
1465const uint8_t sstep_buf1[4] = { 1, 2, 3, 4};
1466uint8_t sstep_buf2[4];
1467
1468void test_single_step(void)
1469{
1470 struct sigaction act;
1471 volatile int val;
1472 int i;
1473
1474 val = 0;
1475 act.sa_sigaction = sig_trap_handler;
1476 sigemptyset(&act.sa_mask);
1477 act.sa_flags = SA_SIGINFO;
1478 sigaction(SIGTRAP, &act, NULL);
1479 asm volatile ("pushf\n"
1480 "orl $0x00100, (%%esp)\n"
1481 "popf\n"
1482 "movl $0xabcd, %0\n"
1483
1484 /* jmp test */
1485 "movl $3, %%ecx\n"
1486 "1:\n"
1487 "addl $1, %0\n"
1488 "decl %%ecx\n"
1489 "jnz 1b\n"
1490
1491 /* movsb: the single step should stop at each movsb iteration */
1492 "movl $sstep_buf1, %%esi\n"
1493 "movl $sstep_buf2, %%edi\n"
1494 "movl $0, %%ecx\n"
1495 "rep movsb\n"
1496 "movl $3, %%ecx\n"
1497 "rep movsb\n"
1498 "movl $1, %%ecx\n"
1499 "rep movsb\n"
1500
1501 /* cmpsb: the single step should stop at each cmpsb iteration */
1502 "movl $sstep_buf1, %%esi\n"
1503 "movl $sstep_buf2, %%edi\n"
1504 "movl $0, %%ecx\n"
1505 "rep cmpsb\n"
1506 "movl $4, %%ecx\n"
1507 "rep cmpsb\n"
1508
1509 /* getpid() syscall: single step should skip one
1510 instruction */
1511 "movl $20, %%eax\n"
1512 "int $0x80\n"
1513 "movl $0, %%eax\n"
1514
1515 /* when modifying SS, trace is not done on the next
1516 instruction */
1517 "movl %%ss, %%ecx\n"
1518 "movl %%ecx, %%ss\n"
1519 "addl $1, %0\n"
1520 "movl $1, %%eax\n"
1521 "movl %%ecx, %%ss\n"
1522 "jmp 1f\n"
1523 "addl $1, %0\n"
1524 "1:\n"
1525 "movl $1, %%eax\n"
1526 "pushl %%ecx\n"
1527 "popl %%ss\n"
1528 "addl $1, %0\n"
1529 "movl $1, %%eax\n"
1530
1531 "pushf\n"
1532 "andl $~0x00100, (%%esp)\n"
1533 "popf\n"
1534 : "=m" (val)
1535 :
1536 : "cc", "memory", "eax", "ecx", "esi", "edi");
1537 printf("val=%d\n", val);
1538 for(i = 0; i < 4; i++)
1539 printf("sstep_buf2[%d] = %d\n", i, sstep_buf2[i]);
1540}
1541
3a27ad0b
FB		 1542/* self modifying code test */
1543uint8_t code[] = {
1544 0xb8, 0x1, 0x00, 0x00, 0x00, /* movl $1, %eax */
1545 0xc3, /* ret */
1546};
1547
d1fe2b24
FB		 1548typedef int FuncType(void);
1549
3a27ad0b
FB		 1550void test_self_modifying_code(void)
1551{
d1fe2b24 1552 int i;
3a27ad0b 1553
3a27ad0b 1554 printf("self modifying code:\n");
d1fe2b24
FB		 1555 printf("func1 = 0x%x\n", ((FuncType *)code)());
1556 for(i = 2; i <= 4; i++) {
1557 code[1] = i;
1558 printf("func%d = 0x%x\n", i, ((FuncType *)code)());
1559 }
3a27ad0b
FB		 1560}
1561
4d1135e4
FB		 1562static void *call_end __init_call = NULL;
1563
1564int main(int argc, char **argv)
1565{
1566 void **ptr;
1567 void (*func)(void);
4b74fe1f 1568
4d1135e4
FB		 1569 ptr = &call_start + 1;
1570 while (*ptr != NULL) {
1571 func = *ptr++;
1572 func();
1573 }
9d8e9c09 1574 test_bsx();
d57c4e01 1575 test_mul();
4d1135e4 1576 test_jcc();
9d8e9c09 1577 test_floats();
55480af8 1578 test_bcd();
1a9353d2 1579 test_xchg();
e1d4294a
FB		 1580 test_string();
1581 test_misc();
6dbad63e
FB		 1582 test_lea();
1583 test_segs();
e5918247 1584 test_code16();
3a27ad0b
FB		 1585 test_vm86();
1586 test_exceptions();
1587 test_self_modifying_code();
3ff0631e 1588 test_single_step();
4d1135e4
FB		 1589 return 0;
1590}
Qemu copy for testing