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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
52static 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
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{\
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 */
293void 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
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
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
430void 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\n"\
516 "movl $0x12345678, %0\n"\
517 #op " %" size "2, %" size "0 ; setz %b1" \
518 : "=r" (res), "=q" (resz)\
519 : "g" (val));\
520 printf("%-10s A=%08x R=%08x %d\n", #op, val, res, resz);\
521}
522
523void test_bsx(void)
524{
525 TEST_BSX(bsrw, "w", 0);
526 TEST_BSX(bsrw, "w", 0x12340128);
527 TEST_BSX(bsrl, "", 0);
528 TEST_BSX(bsrl, "", 0x00340128);
529 TEST_BSX(bsfw, "w", 0);
530 TEST_BSX(bsfw, "w", 0x12340128);
531 TEST_BSX(bsfl, "", 0);
532 TEST_BSX(bsfl, "", 0x00340128);
533}
534
535/**********************************************/
536
537void test_fops(double a, double b)
538{
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 a*b=%f\n", a, b, a * b);
542 printf("a=%f b=%f a/b=%f\n", a, b, a / b);
543 printf("a=%f b=%f fmod(a, b)=%f\n", a, b, fmod(a, b));
544 printf("a=%f sqrt(a)=%f\n", a, sqrt(a));
545 printf("a=%f sin(a)=%f\n", a, sin(a));
546 printf("a=%f cos(a)=%f\n", a, cos(a));
547 printf("a=%f tan(a)=%f\n", a, tan(a));
548 printf("a=%f log(a)=%f\n", a, log(a));
549 printf("a=%f exp(a)=%f\n", a, exp(a));
550 printf("a=%f b=%f atan2(a, b)=%f\n", a, b, atan2(a, b));
551 /* just to test some op combining */
552 printf("a=%f asin(sin(a))=%f\n", a, asin(sin(a)));
553 printf("a=%f acos(cos(a))=%f\n", a, acos(cos(a)));
554 printf("a=%f atan(tan(a))=%f\n", a, atan(tan(a)));
555
556}
557
558void test_fcmp(double a, double b)
559{
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 printf("(%f<=%f)=%d\n",
569 a, b, a >= b);
570 if (TEST_FCOMI) {
571 unsigned int eflags;
572 /* test f(u)comi instruction */
573 asm("fcomi %2, %1\n"
574 "pushf\n"
575 "pop %0\n"
576 : "=r" (eflags)
577 : "t" (a), "u" (b));
578 printf("fcomi(%f %f)=%08x\n", a, b, eflags & (CC_Z | CC_P | CC_C));
579 }
580}
581
582void test_fcvt(double a)
583{
584 float fa;
585 long double la;
586 int16_t fpuc;
587 int i;
588 int64_t lla;
589 int ia;
590 int16_t wa;
591 double ra;
592
593 fa = a;
594 la = a;
595 printf("(float)%f = %f\n", a, fa);
596 printf("(long double)%f = %Lf\n", a, la);
597 printf("a=%016Lx\n", *(long long *)&a);
598 printf("la=%016Lx %04x\n", *(long long *)&la,
599 *(unsigned short *)((char *)(&la) + 8));
600
601 /* test all roundings */
602 asm volatile ("fstcw %0" : "=m" (fpuc));
603 for(i=0;i<4;i++) {
604 asm volatile ("fldcw %0" : : "m" ((fpuc & ~0x0c00) | (i << 10)));
605 asm volatile ("fist %0" : "=m" (wa) : "t" (a));
606 asm volatile ("fistl %0" : "=m" (ia) : "t" (a));
607 asm volatile ("fistpll %0" : "=m" (lla) : "t" (a) : "st");
608 asm volatile ("frndint ; fstl %0" : "=m" (ra) : "t" (a));
609 asm volatile ("fldcw %0" : : "m" (fpuc));
610 printf("(short)a = %d\n", wa);
611 printf("(int)a = %d\n", ia);
612 printf("(int64_t)a = %Ld\n", lla);
613 printf("rint(a) = %f\n", ra);
614 }
615}
616
617#define TEST(N) \
618 asm("fld" #N : "=t" (a)); \
619 printf("fld" #N "= %f\n", a);
620
621void test_fconst(void)
622{
623 double a;
624 TEST(1);
625 TEST(l2t);
626 TEST(l2e);
627 TEST(pi);
628 TEST(lg2);
629 TEST(ln2);
630 TEST(z);
631}
632
633void test_fbcd(double a)
634{
635 unsigned short bcd[5];
636 double b;
637
638 asm("fbstp %0" : "=m" (bcd[0]) : "t" (a) : "st");
639 asm("fbld %1" : "=t" (b) : "m" (bcd[0]));
640 printf("a=%f bcd=%04x%04x%04x%04x%04x b=%f\n",
641 a, bcd[4], bcd[3], bcd[2], bcd[1], bcd[0], b);
642}
643
644#define TEST_ENV(env, save, restore)\
645{\
646 memset((env), 0xaa, sizeof(*(env)));\
647 for(i=0;i<5;i++)\
648 asm volatile ("fldl %0" : : "m" (dtab[i]));\
649 asm(save " %0\n" : : "m" (*(env)));\
650 asm(restore " %0\n": : "m" (*(env)));\
651 for(i=0;i<5;i++)\
652 asm volatile ("fstpl %0" : "=m" (rtab[i]));\
653 for(i=0;i<5;i++)\
654 printf("res[%d]=%f\n", i, rtab[i]);\
655 printf("fpuc=%04x fpus=%04x fptag=%04x\n",\
656 (env)->fpuc,\
657 (env)->fpus & 0xff00,\
658 (env)->fptag);\
659}
660
661void test_fenv(void)
662{
663 struct __attribute__((packed)) {
664 uint16_t fpuc;
665 uint16_t dummy1;
666 uint16_t fpus;
667 uint16_t dummy2;
668 uint16_t fptag;
669 uint16_t dummy3;
670 uint32_t ignored[4];
671 long double fpregs[8];
672 } float_env32;
673 struct __attribute__((packed)) {
674 uint16_t fpuc;
675 uint16_t fpus;
676 uint16_t fptag;
677 uint16_t ignored[4];
678 long double fpregs[8];
679 } float_env16;
680 double dtab[8];
681 double rtab[8];
682 int i;
683
684 for(i=0;i<8;i++)
685 dtab[i] = i + 1;
686
687 TEST_ENV(&float_env16, "data16 fnstenv", "data16 fldenv");
688 TEST_ENV(&float_env16, "data16 fnsave", "data16 frstor");
689 TEST_ENV(&float_env32, "fnstenv", "fldenv");
690 TEST_ENV(&float_env32, "fnsave", "frstor");
691
692 /* test for ffree */
693 for(i=0;i<5;i++)
694 asm volatile ("fldl %0" : : "m" (dtab[i]));
695 asm volatile("ffree %st(2)");
696 asm volatile ("fnstenv %0\n" : : "m" (float_env32));
697 asm volatile ("fninit");
698 printf("fptag=%04x\n", float_env32.fptag);
699}
700
701
702#define TEST_FCMOV(a, b, eflags, CC)\
703{\
704 double res;\
705 asm("push %3\n"\
706 "popf\n"\
707 "fcmov" CC " %2, %0\n"\
708 : "=t" (res)\
709 : "0" (a), "u" (b), "g" (eflags));\
710 printf("fcmov%s eflags=0x%04x-> %f\n", \
711 CC, eflags, res);\
712}
713
714void test_fcmov(void)
715{
716 double a, b;
717 int eflags, i;
718
719 a = 1.0;
720 b = 2.0;
721 for(i = 0; i < 4; i++) {
722 eflags = 0;
723 if (i & 1)
724 eflags |= CC_C;
725 if (i & 2)
726 eflags |= CC_Z;
727 TEST_FCMOV(a, b, eflags, "b");
728 TEST_FCMOV(a, b, eflags, "e");
729 TEST_FCMOV(a, b, eflags, "be");
730 TEST_FCMOV(a, b, eflags, "nb");
731 TEST_FCMOV(a, b, eflags, "ne");
732 TEST_FCMOV(a, b, eflags, "nbe");
733 }
734 TEST_FCMOV(a, b, 0, "u");
735 TEST_FCMOV(a, b, CC_P, "u");
736 TEST_FCMOV(a, b, 0, "nu");
737 TEST_FCMOV(a, b, CC_P, "nu");
738}
739
740void test_floats(void)
741{
742 test_fops(2, 3);
743 test_fops(1.4, -5);
744 test_fcmp(2, -1);
745 test_fcmp(2, 2);
746 test_fcmp(2, 3);
747 test_fcvt(0.5);
748 test_fcvt(-0.5);
749 test_fcvt(1.0/7.0);
750 test_fcvt(-1.0/9.0);
751 test_fcvt(32768);
752 test_fcvt(-1e20);
753 test_fconst();
754 test_fbcd(1234567890123456);
755 test_fbcd(-123451234567890);
756 test_fenv();
757 if (TEST_CMOV) {
758 test_fcmov();
759 }
760}
761
762/**********************************************/
763
764#define TEST_BCD(op, op0, cc_in, cc_mask)\
765{\
766 int res, flags;\
767 res = op0;\
768 flags = cc_in;\
769 asm ("push %3\n\t"\
770 "popf\n\t"\
771 #op "\n\t"\
772 "pushf\n\t"\
773 "popl %1\n\t"\
774 : "=a" (res), "=g" (flags)\
775 : "0" (res), "1" (flags));\
776 printf("%-10s A=%08x R=%08x CCIN=%04x CC=%04x\n",\
777 #op, op0, res, cc_in, flags & cc_mask);\
778}
779
780void test_bcd(void)
781{
782 TEST_BCD(daa, 0x12340503, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
783 TEST_BCD(daa, 0x12340506, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
784 TEST_BCD(daa, 0x12340507, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
785 TEST_BCD(daa, 0x12340559, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
786 TEST_BCD(daa, 0x12340560, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
787 TEST_BCD(daa, 0x1234059f, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
788 TEST_BCD(daa, 0x123405a0, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
789 TEST_BCD(daa, 0x12340503, 0, (CC_C | CC_P | CC_Z | CC_S | CC_A));
790 TEST_BCD(daa, 0x12340506, 0, (CC_C | CC_P | CC_Z | CC_S | CC_A));
791 TEST_BCD(daa, 0x12340503, CC_C, (CC_C | CC_P | CC_Z | CC_S | CC_A));
792 TEST_BCD(daa, 0x12340506, CC_C, (CC_C | CC_P | CC_Z | CC_S | CC_A));
793 TEST_BCD(daa, 0x12340503, CC_C | CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
794 TEST_BCD(daa, 0x12340506, CC_C | CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
795
796 TEST_BCD(das, 0x12340503, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
797 TEST_BCD(das, 0x12340506, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
798 TEST_BCD(das, 0x12340507, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
799 TEST_BCD(das, 0x12340559, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
800 TEST_BCD(das, 0x12340560, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
801 TEST_BCD(das, 0x1234059f, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
802 TEST_BCD(das, 0x123405a0, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
803 TEST_BCD(das, 0x12340503, 0, (CC_C | CC_P | CC_Z | CC_S | CC_A));
804 TEST_BCD(das, 0x12340506, 0, (CC_C | CC_P | CC_Z | CC_S | CC_A));
805 TEST_BCD(das, 0x12340503, CC_C, (CC_C | CC_P | CC_Z | CC_S | CC_A));
806 TEST_BCD(das, 0x12340506, CC_C, (CC_C | CC_P | CC_Z | CC_S | CC_A));
807 TEST_BCD(das, 0x12340503, CC_C | CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
808 TEST_BCD(das, 0x12340506, CC_C | CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
809
810 TEST_BCD(aaa, 0x12340205, CC_A, (CC_C | CC_A));
811 TEST_BCD(aaa, 0x12340306, CC_A, (CC_C | CC_A));
812 TEST_BCD(aaa, 0x1234040a, CC_A, (CC_C | CC_A));
813 TEST_BCD(aaa, 0x123405fa, CC_A, (CC_C | CC_A));
814 TEST_BCD(aaa, 0x12340205, 0, (CC_C | CC_A));
815 TEST_BCD(aaa, 0x12340306, 0, (CC_C | CC_A));
816 TEST_BCD(aaa, 0x1234040a, 0, (CC_C | CC_A));
817 TEST_BCD(aaa, 0x123405fa, 0, (CC_C | CC_A));
818
819 TEST_BCD(aas, 0x12340205, CC_A, (CC_C | CC_A));
820 TEST_BCD(aas, 0x12340306, CC_A, (CC_C | CC_A));
821 TEST_BCD(aas, 0x1234040a, CC_A, (CC_C | CC_A));
822 TEST_BCD(aas, 0x123405fa, CC_A, (CC_C | CC_A));
823 TEST_BCD(aas, 0x12340205, 0, (CC_C | CC_A));
824 TEST_BCD(aas, 0x12340306, 0, (CC_C | CC_A));
825 TEST_BCD(aas, 0x1234040a, 0, (CC_C | CC_A));
826 TEST_BCD(aas, 0x123405fa, 0, (CC_C | CC_A));
827
828 TEST_BCD(aam, 0x12340547, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_O | CC_A));
829 TEST_BCD(aad, 0x12340407, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_O | CC_A));
830}
831
832#define TEST_XCHG(op, size, opconst)\
833{\
834 int op0, op1;\
835 op0 = 0x12345678;\
836 op1 = 0xfbca7654;\
837 asm(#op " %" size "0, %" size "1" \
838 : "=q" (op0), opconst (op1) \
839 : "0" (op0), "1" (op1));\
840 printf("%-10s A=%08x B=%08x\n",\
841 #op, op0, op1);\
842}
843
844#define TEST_CMPXCHG(op, size, opconst, eax)\
845{\
846 int op0, op1;\
847 op0 = 0x12345678;\
848 op1 = 0xfbca7654;\
849 asm(#op " %" size "0, %" size "1" \
850 : "=q" (op0), opconst (op1) \
851 : "0" (op0), "1" (op1), "a" (eax));\
852 printf("%-10s EAX=%08x A=%08x C=%08x\n",\
853 #op, eax, op0, op1);\
854}
855
856void test_xchg(void)
857{
858 TEST_XCHG(xchgl, "", "=q");
859 TEST_XCHG(xchgw, "w", "=q");
860 TEST_XCHG(xchgb, "b", "=q");
861
862 TEST_XCHG(xchgl, "", "=m");
863 TEST_XCHG(xchgw, "w", "=m");
864 TEST_XCHG(xchgb, "b", "=m");
865
866 TEST_XCHG(xaddl, "", "=q");
867 TEST_XCHG(xaddw, "w", "=q");
868 TEST_XCHG(xaddb, "b", "=q");
869
870 {
871 int res;
872 res = 0x12345678;
873 asm("xaddl %1, %0" : "=r" (res) : "0" (res));
874 printf("xaddl same res=%08x\n", res);
875 }
876
877 TEST_XCHG(xaddl, "", "=m");
878 TEST_XCHG(xaddw, "w", "=m");
879 TEST_XCHG(xaddb, "b", "=m");
880
881 TEST_CMPXCHG(cmpxchgl, "", "=q", 0xfbca7654);
882 TEST_CMPXCHG(cmpxchgw, "w", "=q", 0xfbca7654);
883 TEST_CMPXCHG(cmpxchgb, "b", "=q", 0xfbca7654);
884
885 TEST_CMPXCHG(cmpxchgl, "", "=q", 0xfffefdfc);
886 TEST_CMPXCHG(cmpxchgw, "w", "=q", 0xfffefdfc);
887 TEST_CMPXCHG(cmpxchgb, "b", "=q", 0xfffefdfc);
888
889 TEST_CMPXCHG(cmpxchgl, "", "=m", 0xfbca7654);
890 TEST_CMPXCHG(cmpxchgw, "w", "=m", 0xfbca7654);
891 TEST_CMPXCHG(cmpxchgb, "b", "=m", 0xfbca7654);
892
893 TEST_CMPXCHG(cmpxchgl, "", "=m", 0xfffefdfc);
894 TEST_CMPXCHG(cmpxchgw, "w", "=m", 0xfffefdfc);
895 TEST_CMPXCHG(cmpxchgb, "b", "=m", 0xfffefdfc);
896
897 {
898 uint64_t op0, op1, op2;
899 int i, eflags;
900
901 for(i = 0; i < 2; i++) {
902 op0 = 0x123456789abcd;
903 if (i == 0)
904 op1 = 0xfbca765423456;
905 else
906 op1 = op0;
907 op2 = 0x6532432432434;
908 asm("cmpxchg8b %1\n"
909 "pushf\n"
910 "popl %2\n"
911 : "=A" (op0), "=m" (op1), "=g" (eflags)
912 : "0" (op0), "m" (op1), "b" ((int)op2), "c" ((int)(op2 >> 32)));
913 printf("cmpxchg8b: op0=%016llx op1=%016llx CC=%02x\n",
914 op0, op1, eflags & CC_Z);
915 }
916 }
917}
918
919/**********************************************/
920/* segmentation tests */
921
922#include <asm/ldt.h>
923#include <linux/unistd.h>
924#include <linux/version.h>
925
926_syscall3(int, modify_ldt, int, func, void *, ptr, unsigned long, bytecount)
927
928#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 66)
929#define modify_ldt_ldt_s user_desc
930#endif
931
932uint8_t seg_data1[4096];
933uint8_t seg_data2[4096];
934
935#define MK_SEL(n) (((n) << 3) | 7)
936
937#define TEST_LR(op, size, seg, mask)\
938{\
939 int res, res2;\
940 res = 0x12345678;\
941 asm (op " %" size "2, %" size "0\n" \
942 "movl $0, %1\n"\
943 "jnz 1f\n"\
944 "movl $1, %1\n"\
945 "1:\n"\
946 : "=r" (res), "=r" (res2) : "m" (seg), "0" (res));\
947 printf(op ": Z=%d %08x\n", res2, res & ~(mask));\
948}
949
950/* NOTE: we use Linux modify_ldt syscall */
951void test_segs(void)
952{
953 struct modify_ldt_ldt_s ldt;
954 long long ldt_table[3];
955 int res, res2;
956 char tmp;
957 struct {
958 uint32_t offset;
959 uint16_t seg;
960 } __attribute__((packed)) segoff;
961
962 ldt.entry_number = 1;
963 ldt.base_addr = (unsigned long)&seg_data1;
964 ldt.limit = (sizeof(seg_data1) + 0xfff) >> 12;
965 ldt.seg_32bit = 1;
966 ldt.contents = MODIFY_LDT_CONTENTS_DATA;
967 ldt.read_exec_only = 0;
968 ldt.limit_in_pages = 1;
969 ldt.seg_not_present = 0;
970 ldt.useable = 1;
971 modify_ldt(1, &ldt, sizeof(ldt)); /* write ldt entry */
972
973 ldt.entry_number = 2;
974 ldt.base_addr = (unsigned long)&seg_data2;
975 ldt.limit = (sizeof(seg_data2) + 0xfff) >> 12;
976 ldt.seg_32bit = 1;
977 ldt.contents = MODIFY_LDT_CONTENTS_DATA;
978 ldt.read_exec_only = 0;
979 ldt.limit_in_pages = 1;
980 ldt.seg_not_present = 0;
981 ldt.useable = 1;
982 modify_ldt(1, &ldt, sizeof(ldt)); /* write ldt entry */
983
984 modify_ldt(0, &ldt_table, sizeof(ldt_table)); /* read ldt entries */
985#if 0
986 {
987 int i;
988 for(i=0;i<3;i++)
989 printf("%d: %016Lx\n", i, ldt_table[i]);
990 }
991#endif
992 /* do some tests with fs or gs */
993 asm volatile ("movl %0, %%fs" : : "r" (MK_SEL(1)));
994
995 seg_data1[1] = 0xaa;
996 seg_data2[1] = 0x55;
997
998 asm volatile ("fs movzbl 0x1, %0" : "=r" (res));
999 printf("FS[1] = %02x\n", res);
1000
1001 asm volatile ("pushl %%gs\n"
1002 "movl %1, %%gs\n"
1003 "gs movzbl 0x1, %0\n"
1004 "popl %%gs\n"
1005 : "=r" (res)
1006 : "r" (MK_SEL(2)));
1007 printf("GS[1] = %02x\n", res);
1008
1009 /* tests with ds/ss (implicit segment case) */
1010 tmp = 0xa5;
1011 asm volatile ("pushl %%ebp\n\t"
1012 "pushl %%ds\n\t"
1013 "movl %2, %%ds\n\t"
1014 "movl %3, %%ebp\n\t"
1015 "movzbl 0x1, %0\n\t"
1016 "movzbl (%%ebp), %1\n\t"
1017 "popl %%ds\n\t"
1018 "popl %%ebp\n\t"
1019 : "=r" (res), "=r" (res2)
1020 : "r" (MK_SEL(1)), "r" (&tmp));
1021 printf("DS[1] = %02x\n", res);
1022 printf("SS[tmp] = %02x\n", res2);
1023
1024 segoff.seg = MK_SEL(2);
1025 segoff.offset = 0xabcdef12;
1026 asm volatile("lfs %2, %0\n\t"
1027 "movl %%fs, %1\n\t"
1028 : "=r" (res), "=g" (res2)
1029 : "m" (segoff));
1030 printf("FS:reg = %04x:%08x\n", res2, res);
1031
1032 TEST_LR("larw", "w", MK_SEL(2), 0x0100);
1033 TEST_LR("larl", "", MK_SEL(2), 0x0100);
1034 TEST_LR("lslw", "w", MK_SEL(2), 0);
1035 TEST_LR("lsll", "", MK_SEL(2), 0);
1036
1037 TEST_LR("larw", "w", 0xfff8, 0);
1038 TEST_LR("larl", "", 0xfff8, 0);
1039 TEST_LR("lslw", "w", 0xfff8, 0);
1040 TEST_LR("lsll", "", 0xfff8, 0);
1041}
1042
1043/* 16 bit code test */
1044extern char code16_start, code16_end;
1045extern char code16_func1;
1046extern char code16_func2;
1047extern char code16_func3;
1048
1049void test_code16(void)
1050{
1051 struct modify_ldt_ldt_s ldt;
1052 int res, res2;
1053
1054 /* build a code segment */
1055 ldt.entry_number = 1;
1056 ldt.base_addr = (unsigned long)&code16_start;
1057 ldt.limit = &code16_end - &code16_start;
1058 ldt.seg_32bit = 0;
1059 ldt.contents = MODIFY_LDT_CONTENTS_CODE;
1060 ldt.read_exec_only = 0;
1061 ldt.limit_in_pages = 0;
1062 ldt.seg_not_present = 0;
1063 ldt.useable = 1;
1064 modify_ldt(1, &ldt, sizeof(ldt)); /* write ldt entry */
1065
1066 /* call the first function */
1067 asm volatile ("lcall %1, %2"
1068 : "=a" (res)
1069 : "i" (MK_SEL(1)), "i" (&code16_func1): "memory", "cc");
1070 printf("func1() = 0x%08x\n", res);
1071 asm volatile ("lcall %2, %3"
1072 : "=a" (res), "=c" (res2)
1073 : "i" (MK_SEL(1)), "i" (&code16_func2): "memory", "cc");
1074 printf("func2() = 0x%08x spdec=%d\n", res, res2);
1075 asm volatile ("lcall %1, %2"
1076 : "=a" (res)
1077 : "i" (MK_SEL(1)), "i" (&code16_func3): "memory", "cc");
1078 printf("func3() = 0x%08x\n", res);
1079}
1080
1081extern char func_lret32;
1082extern char func_iret32;
1083
1084void test_misc(void)
1085{
1086 char table[256];
1087 int res, i;
1088
1089 for(i=0;i<256;i++) table[i] = 256 - i;
1090 res = 0x12345678;
1091 asm ("xlat" : "=a" (res) : "b" (table), "0" (res));
1092 printf("xlat: EAX=%08x\n", res);
1093
1094 asm volatile ("pushl %%cs ; call %1"
1095 : "=a" (res)
1096 : "m" (func_lret32): "memory", "cc");
1097 printf("func_lret32=%x\n", res);
1098
1099 asm volatile ("pushfl ; pushl %%cs ; call %1"
1100 : "=a" (res)
1101 : "m" (func_iret32): "memory", "cc");
1102 printf("func_iret32=%x\n", res);
1103
1104 /* specific popl test */
1105 asm volatile ("pushl $12345432 ; pushl $0x9abcdef ; popl (%%esp) ; popl %0"
1106 : "=g" (res));
1107 printf("popl esp=%x\n", res);
1108
1109 /* specific popw test */
1110 asm volatile ("pushl $12345432 ; pushl $0x9abcdef ; popw (%%esp) ; addl $2, %%esp ; popl %0"
1111 : "=g" (res));
1112 printf("popw esp=%x\n", res);
1113}
1114
1115uint8_t str_buffer[4096];
1116
1117#define TEST_STRING1(OP, size, DF, REP)\
1118{\
1119 int esi, edi, eax, ecx, eflags;\
1120\
1121 esi = (long)(str_buffer + sizeof(str_buffer) / 2);\
1122 edi = (long)(str_buffer + sizeof(str_buffer) / 2) + 16;\
1123 eax = 0x12345678;\
1124 ecx = 17;\
1125\
1126 asm volatile ("pushl $0\n\t"\
1127 "popf\n\t"\
1128 DF "\n\t"\
1129 REP #OP size "\n\t"\
1130 "cld\n\t"\
1131 "pushf\n\t"\
1132 "popl %4\n\t"\
1133 : "=S" (esi), "=D" (edi), "=a" (eax), "=c" (ecx), "=g" (eflags)\
1134 : "0" (esi), "1" (edi), "2" (eax), "3" (ecx));\
1135 printf("%-10s ESI=%08x EDI=%08x EAX=%08x ECX=%08x EFL=%04x\n",\
1136 REP #OP size, esi, edi, eax, ecx,\
1137 eflags & (CC_C | CC_P | CC_Z | CC_S | CC_O | CC_A));\
1138}
1139
1140#define TEST_STRING(OP, REP)\
1141 TEST_STRING1(OP, "b", "", REP);\
1142 TEST_STRING1(OP, "w", "", REP);\
1143 TEST_STRING1(OP, "l", "", REP);\
1144 TEST_STRING1(OP, "b", "std", REP);\
1145 TEST_STRING1(OP, "w", "std", REP);\
1146 TEST_STRING1(OP, "l", "std", REP)
1147
1148void test_string(void)
1149{
1150 int i;
1151 for(i = 0;i < sizeof(str_buffer); i++)
1152 str_buffer[i] = i + 0x56;
1153 TEST_STRING(stos, "");
1154 TEST_STRING(stos, "rep ");
1155 TEST_STRING(lods, ""); /* to verify stos */
1156 TEST_STRING(lods, "rep ");
1157 TEST_STRING(movs, "");
1158 TEST_STRING(movs, "rep ");
1159 TEST_STRING(lods, ""); /* to verify stos */
1160
1161 /* XXX: better tests */
1162 TEST_STRING(scas, "");
1163 TEST_STRING(scas, "repz ");
1164 TEST_STRING(scas, "repnz ");
1165 TEST_STRING(cmps, "");
1166 TEST_STRING(cmps, "repz ");
1167 TEST_STRING(cmps, "repnz ");
1168}
1169
1170/* VM86 test */
1171
1172static inline void set_bit(uint8_t *a, unsigned int bit)
1173{
1174 a[bit / 8] |= (1 << (bit % 8));
1175}
1176
1177static inline uint8_t *seg_to_linear(unsigned int seg, unsigned int reg)
1178{
1179 return (uint8_t *)((seg << 4) + (reg & 0xffff));
1180}
1181
1182static inline void pushw(struct vm86_regs *r, int val)
1183{
1184 r->esp = (r->esp & ~0xffff) | ((r->esp - 2) & 0xffff);
1185 *(uint16_t *)seg_to_linear(r->ss, r->esp) = val;
1186}
1187
1188#undef __syscall_return
1189#define __syscall_return(type, res) \
1190do { \
1191 return (type) (res); \
1192} while (0)
1193
1194_syscall2(int, vm86, int, func, struct vm86plus_struct *, v86)
1195
1196extern char vm86_code_start;
1197extern char vm86_code_end;
1198
1199#define VM86_CODE_CS 0x100
1200#define VM86_CODE_IP 0x100
1201
1202void test_vm86(void)
1203{
1204 struct vm86plus_struct ctx;
1205 struct vm86_regs *r;
1206 uint8_t *vm86_mem;
1207 int seg, ret;
1208
1209 vm86_mem = mmap((void *)0x00000000, 0x110000,
1210 PROT_WRITE | PROT_READ | PROT_EXEC,
1211 MAP_FIXED | MAP_ANON | MAP_PRIVATE, -1, 0);
1212 if (vm86_mem == MAP_FAILED) {
1213 printf("ERROR: could not map vm86 memory");
1214 return;
1215 }
1216 memset(&ctx, 0, sizeof(ctx));
1217
1218 /* init basic registers */
1219 r = &ctx.regs;
1220 r->eip = VM86_CODE_IP;
1221 r->esp = 0xfffe;
1222 seg = VM86_CODE_CS;
1223 r->cs = seg;
1224 r->ss = seg;
1225 r->ds = seg;
1226 r->es = seg;
1227 r->fs = seg;
1228 r->gs = seg;
1229 r->eflags = VIF_MASK;
1230
1231 /* move code to proper address. We use the same layout as a .com
1232 dos program. */
1233 memcpy(vm86_mem + (VM86_CODE_CS << 4) + VM86_CODE_IP,
1234 &vm86_code_start, &vm86_code_end - &vm86_code_start);
1235
1236 /* mark int 0x21 as being emulated */
1237 set_bit((uint8_t *)&ctx.int_revectored, 0x21);
1238
1239 for(;;) {
1240 ret = vm86(VM86_ENTER, &ctx);
1241 switch(VM86_TYPE(ret)) {
1242 case VM86_INTx:
1243 {
1244 int int_num, ah, v;
1245
1246 int_num = VM86_ARG(ret);
1247 if (int_num != 0x21)
1248 goto unknown_int;
1249 ah = (r->eax >> 8) & 0xff;
1250 switch(ah) {
1251 case 0x00: /* exit */
1252 goto the_end;
1253 case 0x02: /* write char */
1254 {
1255 uint8_t c = r->edx;
1256 putchar(c);
1257 }
1258 break;
1259 case 0x09: /* write string */
1260 {
1261 uint8_t c, *ptr;
1262 ptr = seg_to_linear(r->ds, r->edx);
1263 for(;;) {
1264 c = *ptr++;
1265 if (c == '$')
1266 break;
1267 putchar(c);
1268 }
1269 r->eax = (r->eax & ~0xff) | '$';
1270 }
1271 break;
1272 case 0xff: /* extension: write eflags number in edx */
1273 v = (int)r->edx;
1274#ifndef LINUX_VM86_IOPL_FIX
1275 v &= ~0x3000;
1276#endif
1277 printf("%08x\n", v);
1278 break;
1279 default:
1280 unknown_int:
1281 printf("unsupported int 0x%02x\n", int_num);
1282 goto the_end;
1283 }
1284 }
1285 break;
1286 case VM86_SIGNAL:
1287 /* a signal came, we just ignore that */
1288 break;
1289 case VM86_STI:
1290 break;
1291 default:
1292 printf("ERROR: unhandled vm86 return code (0x%x)\n", ret);
1293 goto the_end;
1294 }
1295 }
1296 the_end:
1297 printf("VM86 end\n");
1298 munmap(vm86_mem, 0x110000);
1299}
1300
1301/* exception tests */
1302#ifndef REG_EAX
1303#define REG_EAX EAX
1304#define REG_EBX EBX
1305#define REG_ECX ECX
1306#define REG_EDX EDX
1307#define REG_ESI ESI
1308#define REG_EDI EDI
1309#define REG_EBP EBP
1310#define REG_ESP ESP
1311#define REG_EIP EIP
1312#define REG_EFL EFL
1313#define REG_TRAPNO TRAPNO
1314#define REG_ERR ERR
1315#endif
1316
1317jmp_buf jmp_env;
1318int v1;
1319int tab[2];
1320
1321void sig_handler(int sig, siginfo_t *info, void *puc)
1322{
1323 struct ucontext *uc = puc;
1324
1325 printf("si_signo=%d si_errno=%d si_code=%d",
1326 info->si_signo, info->si_errno, info->si_code);
1327 printf(" si_addr=0x%08lx",
1328 (unsigned long)info->si_addr);
1329 printf("\n");
1330
1331 printf("trapno=0x%02x err=0x%08x",
1332 uc->uc_mcontext.gregs[REG_TRAPNO],
1333 uc->uc_mcontext.gregs[REG_ERR]);
1334 printf(" EIP=0x%08x", uc->uc_mcontext.gregs[REG_EIP]);
1335 printf("\n");
1336 longjmp(jmp_env, 1);
1337}
1338
1339void test_exceptions(void)
1340{
1341 struct modify_ldt_ldt_s ldt;
1342 struct sigaction act;
1343 volatile int val;
1344
1345 act.sa_sigaction = sig_handler;
1346 sigemptyset(&act.sa_mask);
1347 act.sa_flags = SA_SIGINFO;
1348 sigaction(SIGFPE, &act, NULL);
1349 sigaction(SIGILL, &act, NULL);
1350 sigaction(SIGSEGV, &act, NULL);
1351 sigaction(SIGBUS, &act, NULL);
1352 sigaction(SIGTRAP, &act, NULL);
1353
1354 /* test division by zero reporting */
1355 printf("DIVZ exception:\n");
1356 if (setjmp(jmp_env) == 0) {
1357 /* now divide by zero */
1358 v1 = 0;
1359 v1 = 2 / v1;
1360 }
1361
1362 printf("BOUND exception:\n");
1363 if (setjmp(jmp_env) == 0) {
1364 /* bound exception */
1365 tab[0] = 1;
1366 tab[1] = 10;
1367 asm volatile ("bound %0, %1" : : "r" (11), "m" (tab[0]));
1368 }
1369
1370 printf("segment exceptions:\n");
1371 if (setjmp(jmp_env) == 0) {
1372 /* load an invalid segment */
1373 asm volatile ("movl %0, %%fs" : : "r" ((0x1234 << 3) | 1));
1374 }
1375 if (setjmp(jmp_env) == 0) {
1376 /* null data segment is valid */
1377 asm volatile ("movl %0, %%fs" : : "r" (3));
1378 /* null stack segment */
1379 asm volatile ("movl %0, %%ss" : : "r" (3));
1380 }
1381
1382 ldt.entry_number = 1;
1383 ldt.base_addr = (unsigned long)&seg_data1;
1384 ldt.limit = (sizeof(seg_data1) + 0xfff) >> 12;
1385 ldt.seg_32bit = 1;
1386 ldt.contents = MODIFY_LDT_CONTENTS_DATA;
1387 ldt.read_exec_only = 0;
1388 ldt.limit_in_pages = 1;
1389 ldt.seg_not_present = 1;
1390 ldt.useable = 1;
1391 modify_ldt(1, &ldt, sizeof(ldt)); /* write ldt entry */
1392
1393 if (setjmp(jmp_env) == 0) {
1394 /* segment not present */
1395 asm volatile ("movl %0, %%fs" : : "r" (MK_SEL(1)));
1396 }
1397
1398 /* test SEGV reporting */
1399 printf("PF exception:\n");
1400 if (setjmp(jmp_env) == 0) {
1401 val = 1;
1402 /* we add a nop to test a weird PC retrieval case */
1403 asm volatile ("nop");
1404 /* now store in an invalid address */
1405 *(char *)0x1234 = 1;
1406 }
1407
1408 /* test SEGV reporting */
1409 printf("PF exception:\n");
1410 if (setjmp(jmp_env) == 0) {
1411 val = 1;
1412 /* read from an invalid address */
1413 v1 = *(char *)0x1234;
1414 }
1415
1416 /* test illegal instruction reporting */
1417 printf("UD2 exception:\n");
1418 if (setjmp(jmp_env) == 0) {
1419 /* now execute an invalid instruction */
1420 asm volatile("ud2");
1421 }
1422 printf("lock nop exception:\n");
1423 if (setjmp(jmp_env) == 0) {
1424 /* now execute an invalid instruction */
1425 asm volatile("lock nop");
1426 }
1427
1428 printf("INT exception:\n");
1429 if (setjmp(jmp_env) == 0) {
1430 asm volatile ("int $0xfd");
1431 }
1432 if (setjmp(jmp_env) == 0) {
1433 asm volatile ("int $0x01");
1434 }
1435 if (setjmp(jmp_env) == 0) {
1436 asm volatile (".byte 0xcd, 0x03");
1437 }
1438 if (setjmp(jmp_env) == 0) {
1439 asm volatile ("int $0x04");
1440 }
1441 if (setjmp(jmp_env) == 0) {
1442 asm volatile ("int $0x05");
1443 }
1444
1445 printf("INT3 exception:\n");
1446 if (setjmp(jmp_env) == 0) {
1447 asm volatile ("int3");
1448 }
1449
1450 printf("CLI exception:\n");
1451 if (setjmp(jmp_env) == 0) {
1452 asm volatile ("cli");
1453 }
1454
1455 printf("STI exception:\n");
1456 if (setjmp(jmp_env) == 0) {
1457 asm volatile ("cli");
1458 }
1459
1460 printf("INTO exception:\n");
1461 if (setjmp(jmp_env) == 0) {
1462 /* overflow exception */
1463 asm volatile ("addl $1, %0 ; into" : : "r" (0x7fffffff));
1464 }
1465
1466 printf("OUTB exception:\n");
1467 if (setjmp(jmp_env) == 0) {
1468 asm volatile ("outb %%al, %%dx" : : "d" (0x4321), "a" (0));
1469 }
1470
1471 printf("INB exception:\n");
1472 if (setjmp(jmp_env) == 0) {
1473 asm volatile ("inb %%dx, %%al" : "=a" (val) : "d" (0x4321));
1474 }
1475
1476 printf("REP OUTSB exception:\n");
1477 if (setjmp(jmp_env) == 0) {
1478 asm volatile ("rep outsb" : : "d" (0x4321), "S" (tab), "c" (1));
1479 }
1480
1481 printf("REP INSB exception:\n");
1482 if (setjmp(jmp_env) == 0) {
1483 asm volatile ("rep insb" : : "d" (0x4321), "D" (tab), "c" (1));
1484 }
1485
1486 printf("HLT exception:\n");
1487 if (setjmp(jmp_env) == 0) {
1488 asm volatile ("hlt");
1489 }
1490
1491 printf("single step exception:\n");
1492 val = 0;
1493 if (setjmp(jmp_env) == 0) {
1494 asm volatile ("pushf\n"
1495 "orl $0x00100, (%%esp)\n"
1496 "popf\n"
1497 "movl $0xabcd, %0\n"
1498 "movl $0x0, %0\n" : "=m" (val) : : "cc", "memory");
1499 }
1500 printf("val=0x%x\n", val);
1501}
1502
1503/* specific precise single step test */
1504void sig_trap_handler(int sig, siginfo_t *info, void *puc)
1505{
1506 struct ucontext *uc = puc;
1507 printf("EIP=0x%08x\n", uc->uc_mcontext.gregs[REG_EIP]);
1508}
1509
1510const uint8_t sstep_buf1[4] = { 1, 2, 3, 4};
1511uint8_t sstep_buf2[4];
1512
1513void test_single_step(void)
1514{
1515 struct sigaction act;
1516 volatile int val;
1517 int i;
1518
1519 val = 0;
1520 act.sa_sigaction = sig_trap_handler;
1521 sigemptyset(&act.sa_mask);
1522 act.sa_flags = SA_SIGINFO;
1523 sigaction(SIGTRAP, &act, NULL);
1524 asm volatile ("pushf\n"
1525 "orl $0x00100, (%%esp)\n"
1526 "popf\n"
1527 "movl $0xabcd, %0\n"
1528
1529 /* jmp test */
1530 "movl $3, %%ecx\n"
1531 "1:\n"
1532 "addl $1, %0\n"
1533 "decl %%ecx\n"
1534 "jnz 1b\n"
1535
1536 /* movsb: the single step should stop at each movsb iteration */
1537 "movl $sstep_buf1, %%esi\n"
1538 "movl $sstep_buf2, %%edi\n"
1539 "movl $0, %%ecx\n"
1540 "rep movsb\n"
1541 "movl $3, %%ecx\n"
1542 "rep movsb\n"
1543 "movl $1, %%ecx\n"
1544 "rep movsb\n"
1545
1546 /* cmpsb: the single step should stop at each cmpsb iteration */
1547 "movl $sstep_buf1, %%esi\n"
1548 "movl $sstep_buf2, %%edi\n"
1549 "movl $0, %%ecx\n"
1550 "rep cmpsb\n"
1551 "movl $4, %%ecx\n"
1552 "rep cmpsb\n"
1553
1554 /* getpid() syscall: single step should skip one
1555 instruction */
1556 "movl $20, %%eax\n"
1557 "int $0x80\n"
1558 "movl $0, %%eax\n"
1559
1560 /* when modifying SS, trace is not done on the next
1561 instruction */
1562 "movl %%ss, %%ecx\n"
1563 "movl %%ecx, %%ss\n"
1564 "addl $1, %0\n"
1565 "movl $1, %%eax\n"
1566 "movl %%ecx, %%ss\n"
1567 "jmp 1f\n"
1568 "addl $1, %0\n"
1569 "1:\n"
1570 "movl $1, %%eax\n"
1571 "pushl %%ecx\n"
1572 "popl %%ss\n"
1573 "addl $1, %0\n"
1574 "movl $1, %%eax\n"
1575
1576 "pushf\n"
1577 "andl $~0x00100, (%%esp)\n"
1578 "popf\n"
1579 : "=m" (val)
1580 :
1581 : "cc", "memory", "eax", "ecx", "esi", "edi");
1582 printf("val=%d\n", val);
1583 for(i = 0; i < 4; i++)
1584 printf("sstep_buf2[%d] = %d\n", i, sstep_buf2[i]);
1585}
1586
1587/* self modifying code test */
1588uint8_t code[] = {
1589 0xb8, 0x1, 0x00, 0x00, 0x00, /* movl $1, %eax */
1590 0xc3, /* ret */
1591};
1592
1593asm("smc_code2:\n"
1594 "movl 4(%esp), %eax\n"
1595 "movl %eax, smc_patch_addr2 + 1\n"
1596 "nop\n"
1597 "nop\n"
1598 "nop\n"
1599 "nop\n"
1600 "nop\n"
1601 "nop\n"
1602 "nop\n"
1603 "nop\n"
1604 "smc_patch_addr2:\n"
1605 "movl $1, %eax\n"
1606 "ret\n");
1607
1608typedef int FuncType(void);
1609extern int smc_code2(int);
1610void test_self_modifying_code(void)
1611{
1612 int i;
1613
1614 printf("self modifying code:\n");
1615 printf("func1 = 0x%x\n", ((FuncType *)code)());
1616 for(i = 2; i <= 4; i++) {
1617 code[1] = i;
1618 printf("func%d = 0x%x\n", i, ((FuncType *)code)());
1619 }
1620
1621 /* more difficult test : the modified code is just after the
1622 modifying instruction. It is forbidden in Intel specs, but it
1623 is used by old DOS programs */
1624 for(i = 2; i <= 4; i++) {
1625 printf("smc_code2(%d) = %d\n", i, smc_code2(i));
1626 }
1627}
1628
1629static void *call_end __init_call = NULL;
1630
1631int main(int argc, char **argv)
1632{
1633 void **ptr;
1634 void (*func)(void);
1635
1636 ptr = &call_start + 1;
1637 while (*ptr != NULL) {
1638 func = *ptr++;
1639 func();
1640 }
1641 test_bsx();
1642 test_mul();
1643 test_jcc();
1644 test_floats();
1645 test_bcd();
1646 test_xchg();
1647 test_string();
1648 test_misc();
1649 test_lea();
1650 test_segs();
1651 test_code16();
1652 test_vm86();
1653 test_exceptions();
1654 test_self_modifying_code();
1655 test_single_step();
1656 return 0;
1657}
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