1 /* 2 * x86 CPU test 3 * 4 * Copyright (c) 2003 Fabrice Bellard 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 19 */ 20 #define _GNU_SOURCE 21 #include <stdlib.h> 22 #include <stdio.h> 23 #include <string.h> 24 #include <inttypes.h> 25 #include <math.h> 26 #include <signal.h> 27 #include <setjmp.h> 28 #include <errno.h> 29 #include <sys/ucontext.h> 30 #include <sys/mman.h> 31 #include <asm/vm86.h> 32 33 #define TEST_CMOV 0 34 #define TEST_FCOMI 0 35 //#define LINUX_VM86_IOPL_FIX 36 //#define TEST_P4_FLAGS 37 38 #define xglue(x, y) x ## y 39 #define glue(x, y) xglue(x, y) 40 #define stringify(s) tostring(s) 41 #define tostring(s) #s 42 43 #define CC_C 0x0001 44 #define CC_P 0x0004 45 #define CC_A 0x0010 46 #define CC_Z 0x0040 47 #define CC_S 0x0080 48 #define CC_O 0x0800 49 50 #define __init_call __attribute__ ((unused,__section__ (".initcall.init"))) 51 52 static void *call_start __init_call = NULL; 53 54 #define CC_MASK (CC_C | CC_P | CC_Z | CC_S | CC_O | CC_A) 55 56 #define OP add 57 #include "test-i386.h" 58 59 #define OP sub 60 #include "test-i386.h" 61 62 #define OP xor 63 #include "test-i386.h" 64 65 #define OP and 66 #include "test-i386.h" 67 68 #define OP or 69 #include "test-i386.h" 70 71 #define OP cmp 72 #include "test-i386.h" 73 74 #define OP adc 75 #define OP_CC 76 #include "test-i386.h" 77 78 #define OP sbb 79 #define OP_CC 80 #include "test-i386.h" 81 82 #define OP inc 83 #define OP_CC 84 #define OP1 85 #include "test-i386.h" 86 87 #define OP dec 88 #define OP_CC 89 #define OP1 90 #include "test-i386.h" 91 92 #define OP neg 93 #define OP_CC 94 #define OP1 95 #include "test-i386.h" 96 97 #define OP not 98 #define OP_CC 99 #define OP1 100 #include "test-i386.h" 101 102 #undef CC_MASK 103 #define CC_MASK (CC_C | CC_P | CC_Z | CC_S | CC_O) 104 105 #define OP shl 106 #include "test-i386-shift.h" 107 108 #define OP shr 109 #include "test-i386-shift.h" 110 111 #define OP sar 112 #include "test-i386-shift.h" 113 114 #define OP rol 115 #include "test-i386-shift.h" 116 117 #define OP ror 118 #include "test-i386-shift.h" 119 120 #define OP rcr 121 #define OP_CC 122 #include "test-i386-shift.h" 123 124 #define OP rcl 125 #define OP_CC 126 #include "test-i386-shift.h" 127 128 #define OP shld 129 #define OP_SHIFTD 130 #define OP_NOBYTE 131 #include "test-i386-shift.h" 132 133 #define OP shrd 134 #define OP_SHIFTD 135 #define OP_NOBYTE 136 #include "test-i386-shift.h" 137 138 /* XXX: should be more precise ? */ 139 #undef CC_MASK 140 #define CC_MASK (CC_C) 141 142 #define OP bt 143 #define OP_NOBYTE 144 #include "test-i386-shift.h" 145 146 #define OP bts 147 #define OP_NOBYTE 148 #include "test-i386-shift.h" 149 150 #define OP btr 151 #define OP_NOBYTE 152 #include "test-i386-shift.h" 153 154 #define OP btc 155 #define OP_NOBYTE 156 #include "test-i386-shift.h" 157 158 /* lea test (modrm support) */ 159 #define TEST_LEA(STR)\ 160 {\ 161 asm("leal " STR ", %0"\ 162 : "=r" (res)\ 163 : "a" (eax), "b" (ebx), "c" (ecx), "d" (edx), "S" (esi), "D" (edi));\ 164 printf("lea %s = %08x\n", STR, res);\ 165 } 166 167 #define TEST_LEA16(STR)\ 168 {\ 169 asm(".code16 ; .byte 0x67 ; leal " STR ", %0 ; .code32"\ 170 : "=wq" (res)\ 171 : "a" (eax), "b" (ebx), "c" (ecx), "d" (edx), "S" (esi), "D" (edi));\ 172 printf("lea %s = %08x\n", STR, res);\ 173 } 174 175 176 void test_lea(void) 177 { 178 int eax, ebx, ecx, edx, esi, edi, res; 179 eax = 0x0001; 180 ebx = 0x0002; 181 ecx = 0x0004; 182 edx = 0x0008; 183 esi = 0x0010; 184 edi = 0x0020; 185 186 TEST_LEA("0x4000"); 187 188 TEST_LEA("(%%eax)"); 189 TEST_LEA("(%%ebx)"); 190 TEST_LEA("(%%ecx)"); 191 TEST_LEA("(%%edx)"); 192 TEST_LEA("(%%esi)"); 193 TEST_LEA("(%%edi)"); 194 195 TEST_LEA("0x40(%%eax)"); 196 TEST_LEA("0x40(%%ebx)"); 197 TEST_LEA("0x40(%%ecx)"); 198 TEST_LEA("0x40(%%edx)"); 199 TEST_LEA("0x40(%%esi)"); 200 TEST_LEA("0x40(%%edi)"); 201 202 TEST_LEA("0x4000(%%eax)"); 203 TEST_LEA("0x4000(%%ebx)"); 204 TEST_LEA("0x4000(%%ecx)"); 205 TEST_LEA("0x4000(%%edx)"); 206 TEST_LEA("0x4000(%%esi)"); 207 TEST_LEA("0x4000(%%edi)"); 208 209 TEST_LEA("(%%eax, %%ecx)"); 210 TEST_LEA("(%%ebx, %%edx)"); 211 TEST_LEA("(%%ecx, %%ecx)"); 212 TEST_LEA("(%%edx, %%ecx)"); 213 TEST_LEA("(%%esi, %%ecx)"); 214 TEST_LEA("(%%edi, %%ecx)"); 215 216 TEST_LEA("0x40(%%eax, %%ecx)"); 217 TEST_LEA("0x4000(%%ebx, %%edx)"); 218 219 TEST_LEA("(%%ecx, %%ecx, 2)"); 220 TEST_LEA("(%%edx, %%ecx, 4)"); 221 TEST_LEA("(%%esi, %%ecx, 8)"); 222 223 TEST_LEA("(,%%eax, 2)"); 224 TEST_LEA("(,%%ebx, 4)"); 225 TEST_LEA("(,%%ecx, 8)"); 226 227 TEST_LEA("0x40(,%%eax, 2)"); 228 TEST_LEA("0x40(,%%ebx, 4)"); 229 TEST_LEA("0x40(,%%ecx, 8)"); 230 231 232 TEST_LEA("-10(%%ecx, %%ecx, 2)"); 233 TEST_LEA("-10(%%edx, %%ecx, 4)"); 234 TEST_LEA("-10(%%esi, %%ecx, 8)"); 235 236 TEST_LEA("0x4000(%%ecx, %%ecx, 2)"); 237 TEST_LEA("0x4000(%%edx, %%ecx, 4)"); 238 TEST_LEA("0x4000(%%esi, %%ecx, 8)"); 239 240 /* limited 16 bit addressing test */ 241 TEST_LEA16("0x4000"); 242 TEST_LEA16("(%%bx)"); 243 TEST_LEA16("(%%si)"); 244 TEST_LEA16("(%%di)"); 245 TEST_LEA16("0x40(%%bx)"); 246 TEST_LEA16("0x40(%%si)"); 247 TEST_LEA16("0x40(%%di)"); 248 TEST_LEA16("0x4000(%%bx)"); 249 TEST_LEA16("0x4000(%%si)"); 250 TEST_LEA16("(%%bx,%%si)"); 251 TEST_LEA16("(%%bx,%%di)"); 252 TEST_LEA16("0x40(%%bx,%%si)"); 253 TEST_LEA16("0x40(%%bx,%%di)"); 254 TEST_LEA16("0x4000(%%bx,%%si)"); 255 TEST_LEA16("0x4000(%%bx,%%di)"); 256 } 257 258 #define TEST_JCC(JCC, v1, v2)\ 259 {\ 260 int res;\ 261 asm("movl $1, %0\n\t"\ 262 "cmpl %2, %1\n\t"\ 263 "j" JCC " 1f\n\t"\ 264 "movl $0, %0\n\t"\ 265 "1:\n\t"\ 266 : "=r" (res)\ 267 : "r" (v1), "r" (v2));\ 268 printf("%-10s %d\n", "j" JCC, res);\ 269 \ 270 asm("movl $0, %0\n\t"\ 271 "cmpl %2, %1\n\t"\ 272 "set" JCC " %b0\n\t"\ 273 : "=r" (res)\ 274 : "r" (v1), "r" (v2));\ 275 printf("%-10s %d\n", "set" JCC, res);\ 276 if (TEST_CMOV) {\ 277 asm("movl $0x12345678, %0\n\t"\ 278 "cmpl %2, %1\n\t"\ 279 "cmov" JCC "l %3, %0\n\t"\ 280 : "=r" (res)\ 281 : "r" (v1), "r" (v2), "m" (1));\ 282 printf("%-10s R=0x%08x\n", "cmov" JCC "l", res);\ 283 asm("movl $0x12345678, %0\n\t"\ 284 "cmpl %2, %1\n\t"\ 285 "cmov" JCC "w %w3, %w0\n\t"\ 286 : "=r" (res)\ 287 : "r" (v1), "r" (v2), "r" (1));\ 288 printf("%-10s R=0x%08x\n", "cmov" JCC "w", res);\ 289 } \ 290 } 291 292 /* various jump tests */ 293 void test_jcc(void) 294 { 295 TEST_JCC("ne", 1, 1); 296 TEST_JCC("ne", 1, 0); 297 298 TEST_JCC("e", 1, 1); 299 TEST_JCC("e", 1, 0); 300 301 TEST_JCC("l", 1, 1); 302 TEST_JCC("l", 1, 0); 303 TEST_JCC("l", 1, -1); 304 305 TEST_JCC("le", 1, 1); 306 TEST_JCC("le", 1, 0); 307 TEST_JCC("le", 1, -1); 308 309 TEST_JCC("ge", 1, 1); 310 TEST_JCC("ge", 1, 0); 311 TEST_JCC("ge", -1, 1); 312 313 TEST_JCC("g", 1, 1); 314 TEST_JCC("g", 1, 0); 315 TEST_JCC("g", 1, -1); 316 317 TEST_JCC("b", 1, 1); 318 TEST_JCC("b", 1, 0); 319 TEST_JCC("b", 1, -1); 320 321 TEST_JCC("be", 1, 1); 322 TEST_JCC("be", 1, 0); 323 TEST_JCC("be", 1, -1); 324 325 TEST_JCC("ae", 1, 1); 326 TEST_JCC("ae", 1, 0); 327 TEST_JCC("ae", 1, -1); 328 329 TEST_JCC("a", 1, 1); 330 TEST_JCC("a", 1, 0); 331 TEST_JCC("a", 1, -1); 332 333 334 TEST_JCC("p", 1, 1); 335 TEST_JCC("p", 1, 0); 336 337 TEST_JCC("np", 1, 1); 338 TEST_JCC("np", 1, 0); 339 340 TEST_JCC("o", 0x7fffffff, 0); 341 TEST_JCC("o", 0x7fffffff, -1); 342 343 TEST_JCC("no", 0x7fffffff, 0); 344 TEST_JCC("no", 0x7fffffff, -1); 345 346 TEST_JCC("s", 0, 1); 347 TEST_JCC("s", 0, -1); 348 TEST_JCC("s", 0, 0); 349 350 TEST_JCC("ns", 0, 1); 351 TEST_JCC("ns", 0, -1); 352 TEST_JCC("ns", 0, 0); 353 } 354 355 #undef CC_MASK 356 #ifdef TEST_P4_FLAGS 357 #define CC_MASK (CC_C | CC_P | CC_Z | CC_S | CC_O | CC_A) 358 #else 359 #define CC_MASK (CC_O | CC_C) 360 #endif 361 362 #define OP mul 363 #include "test-i386-muldiv.h" 364 365 #define OP imul 366 #include "test-i386-muldiv.h" 367 368 void test_imulw2(int op0, int op1) 369 { 370 int res, s1, s0, flags; 371 s0 = op0; 372 s1 = op1; 373 res = s0; 374 flags = 0; 375 asm ("push %4\n\t" 376 "popf\n\t" 377 "imulw %w2, %w0\n\t" 378 "pushf\n\t" 379 "popl %1\n\t" 380 : "=q" (res), "=g" (flags) 381 : "q" (s1), "0" (res), "1" (flags)); 382 printf("%-10s A=%08x B=%08x R=%08x CC=%04x\n", 383 "imulw", s0, s1, res, flags & CC_MASK); 384 } 385 386 void test_imull2(int op0, int op1) 387 { 388 int res, s1, s0, flags; 389 s0 = op0; 390 s1 = op1; 391 res = s0; 392 flags = 0; 393 asm ("push %4\n\t" 394 "popf\n\t" 395 "imull %2, %0\n\t" 396 "pushf\n\t" 397 "popl %1\n\t" 398 : "=q" (res), "=g" (flags) 399 : "q" (s1), "0" (res), "1" (flags)); 400 printf("%-10s A=%08x B=%08x R=%08x CC=%04x\n", 401 "imull", s0, s1, res, flags & CC_MASK); 402 } 403 404 #define TEST_IMUL_IM(size, size1, op0, op1)\ 405 {\ 406 int res, flags;\ 407 flags = 0;\ 408 res = 0;\ 409 asm ("push %3\n\t"\ 410 "popf\n\t"\ 411 "imul" size " $" #op0 ", %" size1 "2, %" size1 "0\n\t" \ 412 "pushf\n\t"\ 413 "popl %1\n\t"\ 414 : "=r" (res), "=g" (flags)\ 415 : "r" (op1), "1" (flags), "0" (res));\ 416 printf("%-10s A=%08x B=%08x R=%08x CC=%04x\n",\ 417 "imul" size, op0, op1, res, flags & CC_MASK);\ 418 } 419 420 421 #undef CC_MASK 422 #define CC_MASK (0) 423 424 #define OP div 425 #include "test-i386-muldiv.h" 426 427 #define OP idiv 428 #include "test-i386-muldiv.h" 429 430 void test_mul(void) 431 { 432 test_imulb(0x1234561d, 4); 433 test_imulb(3, -4); 434 test_imulb(0x80, 0x80); 435 test_imulb(0x10, 0x10); 436 437 test_imulw(0, 0x1234001d, 45); 438 test_imulw(0, 23, -45); 439 test_imulw(0, 0x8000, 0x8000); 440 test_imulw(0, 0x100, 0x100); 441 442 test_imull(0, 0x1234001d, 45); 443 test_imull(0, 23, -45); 444 test_imull(0, 0x80000000, 0x80000000); 445 test_imull(0, 0x10000, 0x10000); 446 447 test_mulb(0x1234561d, 4); 448 test_mulb(3, -4); 449 test_mulb(0x80, 0x80); 450 test_mulb(0x10, 0x10); 451 452 test_mulw(0, 0x1234001d, 45); 453 test_mulw(0, 23, -45); 454 test_mulw(0, 0x8000, 0x8000); 455 test_mulw(0, 0x100, 0x100); 456 457 test_mull(0, 0x1234001d, 45); 458 test_mull(0, 23, -45); 459 test_mull(0, 0x80000000, 0x80000000); 460 test_mull(0, 0x10000, 0x10000); 461 462 test_imulw2(0x1234001d, 45); 463 test_imulw2(23, -45); 464 test_imulw2(0x8000, 0x8000); 465 test_imulw2(0x100, 0x100); 466 467 test_imull2(0x1234001d, 45); 468 test_imull2(23, -45); 469 test_imull2(0x80000000, 0x80000000); 470 test_imull2(0x10000, 0x10000); 471 472 TEST_IMUL_IM("w", "w", 45, 0x1234); 473 TEST_IMUL_IM("w", "w", -45, 23); 474 TEST_IMUL_IM("w", "w", 0x8000, 0x80000000); 475 TEST_IMUL_IM("w", "w", 0x7fff, 0x1000); 476 477 TEST_IMUL_IM("l", "", 45, 0x1234); 478 TEST_IMUL_IM("l", "", -45, 23); 479 TEST_IMUL_IM("l", "", 0x8000, 0x80000000); 480 TEST_IMUL_IM("l", "", 0x7fff, 0x1000); 481 482 test_idivb(0x12341678, 0x127e); 483 test_idivb(0x43210123, -5); 484 test_idivb(0x12340004, -1); 485 486 test_idivw(0, 0x12345678, 12347); 487 test_idivw(0, -23223, -45); 488 test_idivw(0, 0x12348000, -1); 489 test_idivw(0x12343, 0x12345678, 0x81238567); 490 491 test_idivl(0, 0x12345678, 12347); 492 test_idivl(0, -233223, -45); 493 test_idivl(0, 0x80000000, -1); 494 test_idivl(0x12343, 0x12345678, 0x81234567); 495 496 test_divb(0x12341678, 0x127e); 497 test_divb(0x43210123, -5); 498 test_divb(0x12340004, -1); 499 500 test_divw(0, 0x12345678, 12347); 501 test_divw(0, -23223, -45); 502 test_divw(0, 0x12348000, -1); 503 test_divw(0x12343, 0x12345678, 0x81238567); 504 505 test_divl(0, 0x12345678, 12347); 506 test_divl(0, -233223, -45); 507 test_divl(0, 0x80000000, -1); 508 test_divl(0x12343, 0x12345678, 0x81234567); 509 } 510 511 #define TEST_BSX(op, size, op0)\ 512 {\ 513 int res, val, resz;\ 514 val = op0;\ 515 asm("xorl %1, %1 ; " #op " %" size "2, %" size "0 ; setz %b1" \ 516 : "=r" (res), "=q" (resz)\ 517 : "g" (val));\ 518 printf("%-10s A=%08x R=%08x %d\n", #op, val, resz ? 0 : res, resz);\ 519 } 520 521 void test_bsx(void) 522 { 523 TEST_BSX(bsrw, "w", 0); 524 TEST_BSX(bsrw, "w", 0x12340128); 525 TEST_BSX(bsrl, "", 0); 526 TEST_BSX(bsrl, "", 0x00340128); 527 TEST_BSX(bsfw, "w", 0); 528 TEST_BSX(bsfw, "w", 0x12340128); 529 TEST_BSX(bsfl, "", 0); 530 TEST_BSX(bsfl, "", 0x00340128); 531 } 532 533 /**********************************************/ 534 535 void test_fops(double a, double b) 536 { 537 printf("a=%f b=%f a+b=%f\n", a, b, a + b); 538 printf("a=%f b=%f a-b=%f\n", a, b, a - b); 539 printf("a=%f b=%f a*b=%f\n", a, b, a * b); 540 printf("a=%f b=%f a/b=%f\n", a, b, a / b); 541 printf("a=%f b=%f fmod(a, b)=%f\n", a, b, fmod(a, b)); 542 printf("a=%f sqrt(a)=%f\n", a, sqrt(a)); 543 printf("a=%f sin(a)=%f\n", a, sin(a)); 544 printf("a=%f cos(a)=%f\n", a, cos(a)); 545 printf("a=%f tan(a)=%f\n", a, tan(a)); 546 printf("a=%f log(a)=%f\n", a, log(a)); 547 printf("a=%f exp(a)=%f\n", a, exp(a)); 548 printf("a=%f b=%f atan2(a, b)=%f\n", a, b, atan2(a, b)); 549 /* just to test some op combining */ 550 printf("a=%f asin(sin(a))=%f\n", a, asin(sin(a))); 551 printf("a=%f acos(cos(a))=%f\n", a, acos(cos(a))); 552 printf("a=%f atan(tan(a))=%f\n", a, atan(tan(a))); 553 554 } 555 556 void test_fcmp(double a, double b) 557 { 558 printf("(%f<%f)=%d\n", 559 a, b, a < b); 560 printf("(%f<=%f)=%d\n", 561 a, b, a <= b); 562 printf("(%f==%f)=%d\n", 563 a, b, a == b); 564 printf("(%f>%f)=%d\n", 565 a, b, a > b); 566 printf("(%f<=%f)=%d\n", 567 a, b, a >= b); 568 if (TEST_FCOMI) { 569 unsigned int eflags; 570 /* test f(u)comi instruction */ 571 asm("fcomi %2, %1\n" 572 "pushf\n" 573 "pop %0\n" 574 : "=r" (eflags) 575 : "t" (a), "u" (b)); 576 printf("fcomi(%f %f)=%08x\n", a, b, eflags & (CC_Z | CC_P | CC_C)); 577 } 578 } 579 580 void test_fcvt(double a) 581 { 582 float fa; 583 long double la; 584 int16_t fpuc; 585 int i; 586 int64_t lla; 587 int ia; 588 int16_t wa; 589 double ra; 590 591 fa = a; 592 la = a; 593 printf("(float)%f = %f\n", a, fa); 594 printf("(long double)%f = %Lf\n", a, la); 595 printf("a=%016Lx\n", *(long long *)&a); 596 printf("la=%016Lx %04x\n", *(long long *)&la, 597 *(unsigned short *)((char *)(&la) + 8)); 598 599 /* test all roundings */ 600 asm volatile ("fstcw %0" : "=m" (fpuc)); 601 for(i=0;i<4;i++) { 602 asm volatile ("fldcw %0" : : "m" ((fpuc & ~0x0c00) | (i << 10))); 603 asm volatile ("fist %0" : "=m" (wa) : "t" (a)); 604 asm volatile ("fistl %0" : "=m" (ia) : "t" (a)); 605 asm volatile ("fistpll %0" : "=m" (lla) : "t" (a) : "st"); 606 asm volatile ("frndint ; fstl %0" : "=m" (ra) : "t" (a)); 607 asm volatile ("fldcw %0" : : "m" (fpuc)); 608 printf("(short)a = %d\n", wa); 609 printf("(int)a = %d\n", ia); 610 printf("(int64_t)a = %Ld\n", lla); 611 printf("rint(a) = %f\n", ra); 612 } 613 } 614 615 #define TEST(N) \ 616 asm("fld" #N : "=t" (a)); \ 617 printf("fld" #N "= %f\n", a); 618 619 void test_fconst(void) 620 { 621 double a; 622 TEST(1); 623 TEST(l2t); 624 TEST(l2e); 625 TEST(pi); 626 TEST(lg2); 627 TEST(ln2); 628 TEST(z); 629 } 630 631 void test_fbcd(double a) 632 { 633 unsigned short bcd[5]; 634 double b; 635 636 asm("fbstp %0" : "=m" (bcd[0]) : "t" (a) : "st"); 637 asm("fbld %1" : "=t" (b) : "m" (bcd[0])); 638 printf("a=%f bcd=%04x%04x%04x%04x%04x b=%f\n", 639 a, bcd[4], bcd[3], bcd[2], bcd[1], bcd[0], b); 640 } 641 642 #define TEST_ENV(env, save, restore)\ 643 {\ 644 memset((env), 0xaa, sizeof(*(env)));\ 645 for(i=0;i<5;i++)\ 646 asm volatile ("fldl %0" : : "m" (dtab[i]));\ 647 asm(save " %0\n" : : "m" (*(env)));\ 648 asm(restore " %0\n": : "m" (*(env)));\ 649 for(i=0;i<5;i++)\ 650 asm volatile ("fstpl %0" : "=m" (rtab[i]));\ 651 for(i=0;i<5;i++)\ 652 printf("res[%d]=%f\n", i, rtab[i]);\ 653 printf("fpuc=%04x fpus=%04x fptag=%04x\n",\ 654 (env)->fpuc,\ 655 (env)->fpus & 0xff00,\ 656 (env)->fptag);\ 657 } 658 659 void test_fenv(void) 660 { 661 struct __attribute__((packed)) { 662 uint16_t fpuc; 663 uint16_t dummy1; 664 uint16_t fpus; 665 uint16_t dummy2; 666 uint16_t fptag; 667 uint16_t dummy3; 668 uint32_t ignored[4]; 669 long double fpregs[8]; 670 } float_env32; 671 struct __attribute__((packed)) { 672 uint16_t fpuc; 673 uint16_t fpus; 674 uint16_t fptag; 675 uint16_t ignored[4]; 676 long double fpregs[8]; 677 } float_env16; 678 double dtab[8]; 679 double rtab[8]; 680 int i; 681 682 for(i=0;i<8;i++) 683 dtab[i] = i + 1; 684 685 TEST_ENV(&float_env16, "data16 fnstenv", "data16 fldenv"); 686 TEST_ENV(&float_env16, "data16 fnsave", "data16 frstor"); 687 TEST_ENV(&float_env32, "fnstenv", "fldenv"); 688 TEST_ENV(&float_env32, "fnsave", "frstor"); 689 } 690 691 692 #define TEST_FCMOV(a, b, eflags, CC)\ 693 {\ 694 double res;\ 695 asm("push %3\n"\ 696 "popf\n"\ 697 "fcmov" CC " %2, %0\n"\ 698 : "=t" (res)\ 699 : "0" (a), "u" (b), "g" (eflags));\ 700 printf("fcmov%s eflags=0x%04x-> %f\n", \ 701 CC, eflags, res);\ 702 } 703 704 void test_fcmov(void) 705 { 706 double a, b; 707 int eflags, i; 708 709 a = 1.0; 710 b = 2.0; 711 for(i = 0; i < 4; i++) { 712 eflags = 0; 713 if (i & 1) 714 eflags |= CC_C; 715 if (i & 2) 716 eflags |= CC_Z; 717 TEST_FCMOV(a, b, eflags, "b"); 718 TEST_FCMOV(a, b, eflags, "e"); 719 TEST_FCMOV(a, b, eflags, "be"); 720 TEST_FCMOV(a, b, eflags, "nb"); 721 TEST_FCMOV(a, b, eflags, "ne"); 722 TEST_FCMOV(a, b, eflags, "nbe"); 723 } 724 TEST_FCMOV(a, b, 0, "u"); 725 TEST_FCMOV(a, b, CC_P, "u"); 726 TEST_FCMOV(a, b, 0, "nu"); 727 TEST_FCMOV(a, b, CC_P, "nu"); 728 } 729 730 void test_floats(void) 731 { 732 test_fops(2, 3); 733 test_fops(1.4, -5); 734 test_fcmp(2, -1); 735 test_fcmp(2, 2); 736 test_fcmp(2, 3); 737 test_fcvt(0.5); 738 test_fcvt(-0.5); 739 test_fcvt(1.0/7.0); 740 test_fcvt(-1.0/9.0); 741 test_fcvt(32768); 742 test_fcvt(-1e20); 743 test_fconst(); 744 test_fbcd(1234567890123456); 745 test_fbcd(-123451234567890); 746 test_fenv(); 747 if (TEST_CMOV) { 748 test_fcmov(); 749 } 750 } 751 752 /**********************************************/ 753 754 #define TEST_BCD(op, op0, cc_in, cc_mask)\ 755 {\ 756 int res, flags;\ 757 res = op0;\ 758 flags = cc_in;\ 759 asm ("push %3\n\t"\ 760 "popf\n\t"\ 761 #op "\n\t"\ 762 "pushf\n\t"\ 763 "popl %1\n\t"\ 764 : "=a" (res), "=g" (flags)\ 765 : "0" (res), "1" (flags));\ 766 printf("%-10s A=%08x R=%08x CCIN=%04x CC=%04x\n",\ 767 #op, op0, res, cc_in, flags & cc_mask);\ 768 } 769 770 void test_bcd(void) 771 { 772 TEST_BCD(daa, 0x12340503, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 773 TEST_BCD(daa, 0x12340506, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 774 TEST_BCD(daa, 0x12340507, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 775 TEST_BCD(daa, 0x12340559, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 776 TEST_BCD(daa, 0x12340560, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 777 TEST_BCD(daa, 0x1234059f, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 778 TEST_BCD(daa, 0x123405a0, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 779 TEST_BCD(daa, 0x12340503, 0, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 780 TEST_BCD(daa, 0x12340506, 0, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 781 TEST_BCD(daa, 0x12340503, CC_C, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 782 TEST_BCD(daa, 0x12340506, CC_C, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 783 TEST_BCD(daa, 0x12340503, CC_C | CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 784 TEST_BCD(daa, 0x12340506, CC_C | CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 785 786 TEST_BCD(das, 0x12340503, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 787 TEST_BCD(das, 0x12340506, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 788 TEST_BCD(das, 0x12340507, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 789 TEST_BCD(das, 0x12340559, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 790 TEST_BCD(das, 0x12340560, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 791 TEST_BCD(das, 0x1234059f, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 792 TEST_BCD(das, 0x123405a0, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 793 TEST_BCD(das, 0x12340503, 0, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 794 TEST_BCD(das, 0x12340506, 0, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 795 TEST_BCD(das, 0x12340503, CC_C, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 796 TEST_BCD(das, 0x12340506, CC_C, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 797 TEST_BCD(das, 0x12340503, CC_C | CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 798 TEST_BCD(das, 0x12340506, CC_C | CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 799 800 TEST_BCD(aaa, 0x12340205, CC_A, (CC_C | CC_A)); 801 TEST_BCD(aaa, 0x12340306, CC_A, (CC_C | CC_A)); 802 TEST_BCD(aaa, 0x1234040a, CC_A, (CC_C | CC_A)); 803 TEST_BCD(aaa, 0x123405fa, CC_A, (CC_C | CC_A)); 804 TEST_BCD(aaa, 0x12340205, 0, (CC_C | CC_A)); 805 TEST_BCD(aaa, 0x12340306, 0, (CC_C | CC_A)); 806 TEST_BCD(aaa, 0x1234040a, 0, (CC_C | CC_A)); 807 TEST_BCD(aaa, 0x123405fa, 0, (CC_C | CC_A)); 808 809 TEST_BCD(aas, 0x12340205, CC_A, (CC_C | CC_A)); 810 TEST_BCD(aas, 0x12340306, CC_A, (CC_C | CC_A)); 811 TEST_BCD(aas, 0x1234040a, CC_A, (CC_C | CC_A)); 812 TEST_BCD(aas, 0x123405fa, CC_A, (CC_C | CC_A)); 813 TEST_BCD(aas, 0x12340205, 0, (CC_C | CC_A)); 814 TEST_BCD(aas, 0x12340306, 0, (CC_C | CC_A)); 815 TEST_BCD(aas, 0x1234040a, 0, (CC_C | CC_A)); 816 TEST_BCD(aas, 0x123405fa, 0, (CC_C | CC_A)); 817 818 TEST_BCD(aam, 0x12340547, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_O | CC_A)); 819 TEST_BCD(aad, 0x12340407, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_O | CC_A)); 820 } 821 822 #define TEST_XCHG(op, size, opconst)\ 823 {\ 824 int op0, op1;\ 825 op0 = 0x12345678;\ 826 op1 = 0xfbca7654;\ 827 asm(#op " %" size "0, %" size "1" \ 828 : "=q" (op0), opconst (op1) \ 829 : "0" (op0), "1" (op1));\ 830 printf("%-10s A=%08x B=%08x\n",\ 831 #op, op0, op1);\ 832 } 833 834 #define TEST_CMPXCHG(op, size, opconst, eax)\ 835 {\ 836 int op0, op1;\ 837 op0 = 0x12345678;\ 838 op1 = 0xfbca7654;\ 839 asm(#op " %" size "0, %" size "1" \ 840 : "=q" (op0), opconst (op1) \ 841 : "0" (op0), "1" (op1), "a" (eax));\ 842 printf("%-10s EAX=%08x A=%08x C=%08x\n",\ 843 #op, eax, op0, op1);\ 844 } 845 846 void test_xchg(void) 847 { 848 TEST_XCHG(xchgl, "", "=q"); 849 TEST_XCHG(xchgw, "w", "=q"); 850 TEST_XCHG(xchgb, "b", "=q"); 851 852 TEST_XCHG(xchgl, "", "=m"); 853 TEST_XCHG(xchgw, "w", "=m"); 854 TEST_XCHG(xchgb, "b", "=m"); 855 856 TEST_XCHG(xaddl, "", "=q"); 857 TEST_XCHG(xaddw, "w", "=q"); 858 TEST_XCHG(xaddb, "b", "=q"); 859 860 { 861 int res; 862 res = 0x12345678; 863 asm("xaddl %1, %0" : "=r" (res) : "0" (res)); 864 printf("xaddl same res=%08x\n", res); 865 } 866 867 TEST_XCHG(xaddl, "", "=m"); 868 TEST_XCHG(xaddw, "w", "=m"); 869 TEST_XCHG(xaddb, "b", "=m"); 870 871 TEST_CMPXCHG(cmpxchgl, "", "=q", 0xfbca7654); 872 TEST_CMPXCHG(cmpxchgw, "w", "=q", 0xfbca7654); 873 TEST_CMPXCHG(cmpxchgb, "b", "=q", 0xfbca7654); 874 875 TEST_CMPXCHG(cmpxchgl, "", "=q", 0xfffefdfc); 876 TEST_CMPXCHG(cmpxchgw, "w", "=q", 0xfffefdfc); 877 TEST_CMPXCHG(cmpxchgb, "b", "=q", 0xfffefdfc); 878 879 TEST_CMPXCHG(cmpxchgl, "", "=m", 0xfbca7654); 880 TEST_CMPXCHG(cmpxchgw, "w", "=m", 0xfbca7654); 881 TEST_CMPXCHG(cmpxchgb, "b", "=m", 0xfbca7654); 882 883 TEST_CMPXCHG(cmpxchgl, "", "=m", 0xfffefdfc); 884 TEST_CMPXCHG(cmpxchgw, "w", "=m", 0xfffefdfc); 885 TEST_CMPXCHG(cmpxchgb, "b", "=m", 0xfffefdfc); 886 887 { 888 uint64_t op0, op1, op2; 889 int i, eflags; 890 891 for(i = 0; i < 2; i++) { 892 op0 = 0x123456789abcd; 893 if (i == 0) 894 op1 = 0xfbca765423456; 895 else 896 op1 = op0; 897 op2 = 0x6532432432434; 898 asm("cmpxchg8b %1\n" 899 "pushf\n" 900 "popl %2\n" 901 : "=A" (op0), "=m" (op1), "=g" (eflags) 902 : "0" (op0), "m" (op1), "b" ((int)op2), "c" ((int)(op2 >> 32))); 903 printf("cmpxchg8b: op0=%016llx op1=%016llx CC=%02x\n", 904 op0, op1, eflags & CC_Z); 905 } 906 } 907 } 908 909 /**********************************************/ 910 /* segmentation tests */ 911 912 #include <asm/ldt.h> 913 #include <linux/unistd.h> 914 #include <linux/version.h> 915 916 _syscall3(int, modify_ldt, int, func, void *, ptr, unsigned long, bytecount) 917 918 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 66) 919 #define modify_ldt_ldt_s user_desc 920 #endif 921 922 uint8_t seg_data1[4096]; 923 uint8_t seg_data2[4096]; 924 925 #define MK_SEL(n) (((n) << 3) | 7) 926 927 #define TEST_LR(op, size, seg, mask)\ 928 {\ 929 int res, res2;\ 930 res = 0x12345678;\ 931 asm (op " %" size "2, %" size "0\n" \ 932 "movl $0, %1\n"\ 933 "jnz 1f\n"\ 934 "movl $1, %1\n"\ 935 "1:\n"\ 936 : "=r" (res), "=r" (res2) : "m" (seg), "0" (res));\ 937 printf(op ": Z=%d %08x\n", res2, res & ~(mask));\ 938 } 939 940 /* NOTE: we use Linux modify_ldt syscall */ 941 void test_segs(void) 942 { 943 struct modify_ldt_ldt_s ldt; 944 long long ldt_table[3]; 945 int res, res2; 946 char tmp; 947 struct { 948 uint32_t offset; 949 uint16_t seg; 950 } __attribute__((packed)) segoff; 951 952 ldt.entry_number = 1; 953 ldt.base_addr = (unsigned long)&seg_data1; 954 ldt.limit = (sizeof(seg_data1) + 0xfff) >> 12; 955 ldt.seg_32bit = 1; 956 ldt.contents = MODIFY_LDT_CONTENTS_DATA; 957 ldt.read_exec_only = 0; 958 ldt.limit_in_pages = 1; 959 ldt.seg_not_present = 0; 960 ldt.useable = 1; 961 modify_ldt(1, &ldt, sizeof(ldt)); /* write ldt entry */ 962 963 ldt.entry_number = 2; 964 ldt.base_addr = (unsigned long)&seg_data2; 965 ldt.limit = (sizeof(seg_data2) + 0xfff) >> 12; 966 ldt.seg_32bit = 1; 967 ldt.contents = MODIFY_LDT_CONTENTS_DATA; 968 ldt.read_exec_only = 0; 969 ldt.limit_in_pages = 1; 970 ldt.seg_not_present = 0; 971 ldt.useable = 1; 972 modify_ldt(1, &ldt, sizeof(ldt)); /* write ldt entry */ 973 974 modify_ldt(0, &ldt_table, sizeof(ldt_table)); /* read ldt entries */ 975 #if 0 976 { 977 int i; 978 for(i=0;i<3;i++) 979 printf("%d: %016Lx\n", i, ldt_table[i]); 980 } 981 #endif 982 /* do some tests with fs or gs */ 983 asm volatile ("movl %0, %%fs" : : "r" (MK_SEL(1))); 984 985 seg_data1[1] = 0xaa; 986 seg_data2[1] = 0x55; 987 988 asm volatile ("fs movzbl 0x1, %0" : "=r" (res)); 989 printf("FS[1] = %02x\n", res); 990 991 asm volatile ("pushl %%gs\n" 992 "movl %1, %%gs\n" 993 "gs movzbl 0x1, %0\n" 994 "popl %%gs\n" 995 : "=r" (res) 996 : "r" (MK_SEL(2))); 997 printf("GS[1] = %02x\n", res); 998 999 /* tests with ds/ss (implicit segment case) */ 1000 tmp = 0xa5; 1001 asm volatile ("pushl %%ebp\n\t" 1002 "pushl %%ds\n\t" 1003 "movl %2, %%ds\n\t" 1004 "movl %3, %%ebp\n\t" 1005 "movzbl 0x1, %0\n\t" 1006 "movzbl (%%ebp), %1\n\t" 1007 "popl %%ds\n\t" 1008 "popl %%ebp\n\t" 1009 : "=r" (res), "=r" (res2) 1010 : "r" (MK_SEL(1)), "r" (&tmp)); 1011 printf("DS[1] = %02x\n", res); 1012 printf("SS[tmp] = %02x\n", res2); 1013 1014 segoff.seg = MK_SEL(2); 1015 segoff.offset = 0xabcdef12; 1016 asm volatile("lfs %2, %0\n\t" 1017 "movl %%fs, %1\n\t" 1018 : "=r" (res), "=g" (res2) 1019 : "m" (segoff)); 1020 printf("FS:reg = %04x:%08x\n", res2, res); 1021 1022 TEST_LR("larw", "w", MK_SEL(2), 0x0100); 1023 TEST_LR("larl", "", MK_SEL(2), 0x0100); 1024 TEST_LR("lslw", "w", MK_SEL(2), 0); 1025 TEST_LR("lsll", "", MK_SEL(2), 0); 1026 1027 TEST_LR("larw", "w", 0xfff8, 0); 1028 TEST_LR("larl", "", 0xfff8, 0); 1029 TEST_LR("lslw", "w", 0xfff8, 0); 1030 TEST_LR("lsll", "", 0xfff8, 0); 1031 } 1032 1033 /* 16 bit code test */ 1034 extern char code16_start, code16_end; 1035 extern char code16_func1; 1036 extern char code16_func2; 1037 extern char code16_func3; 1038 1039 void test_code16(void) 1040 { 1041 struct modify_ldt_ldt_s ldt; 1042 int res, res2; 1043 1044 /* build a code segment */ 1045 ldt.entry_number = 1; 1046 ldt.base_addr = (unsigned long)&code16_start; 1047 ldt.limit = &code16_end - &code16_start; 1048 ldt.seg_32bit = 0; 1049 ldt.contents = MODIFY_LDT_CONTENTS_CODE; 1050 ldt.read_exec_only = 0; 1051 ldt.limit_in_pages = 0; 1052 ldt.seg_not_present = 0; 1053 ldt.useable = 1; 1054 modify_ldt(1, &ldt, sizeof(ldt)); /* write ldt entry */ 1055 1056 /* call the first function */ 1057 asm volatile ("lcall %1, %2" 1058 : "=a" (res) 1059 : "i" (MK_SEL(1)), "i" (&code16_func1): "memory", "cc"); 1060 printf("func1() = 0x%08x\n", res); 1061 asm volatile ("lcall %2, %3" 1062 : "=a" (res), "=c" (res2) 1063 : "i" (MK_SEL(1)), "i" (&code16_func2): "memory", "cc"); 1064 printf("func2() = 0x%08x spdec=%d\n", res, res2); 1065 asm volatile ("lcall %1, %2" 1066 : "=a" (res) 1067 : "i" (MK_SEL(1)), "i" (&code16_func3): "memory", "cc"); 1068 printf("func3() = 0x%08x\n", res); 1069 } 1070 1071 extern char func_lret32; 1072 extern char func_iret32; 1073 1074 void test_misc(void) 1075 { 1076 char table[256]; 1077 int res, i; 1078 1079 for(i=0;i<256;i++) table[i] = 256 - i; 1080 res = 0x12345678; 1081 asm ("xlat" : "=a" (res) : "b" (table), "0" (res)); 1082 printf("xlat: EAX=%08x\n", res); 1083 1084 asm volatile ("pushl %%cs ; call %1" 1085 : "=a" (res) 1086 : "m" (func_lret32): "memory", "cc"); 1087 printf("func_lret32=%x\n", res); 1088 1089 asm volatile ("pushfl ; pushl %%cs ; call %1" 1090 : "=a" (res) 1091 : "m" (func_iret32): "memory", "cc"); 1092 printf("func_iret32=%x\n", res); 1093 1094 /* specific popl test */ 1095 asm volatile ("pushl $12345432 ; pushl $0x9abcdef ; popl (%%esp) ; popl %0" 1096 : "=g" (res)); 1097 printf("popl esp=%x\n", res); 1098 1099 /* specific popw test */ 1100 asm volatile ("pushl $12345432 ; pushl $0x9abcdef ; popw (%%esp) ; addl $2, %%esp ; popl %0" 1101 : "=g" (res)); 1102 printf("popw esp=%x\n", res); 1103 } 1104 1105 uint8_t str_buffer[4096]; 1106 1107 #define TEST_STRING1(OP, size, DF, REP)\ 1108 {\ 1109 int esi, edi, eax, ecx, eflags;\ 1110 \ 1111 esi = (long)(str_buffer + sizeof(str_buffer) / 2);\ 1112 edi = (long)(str_buffer + sizeof(str_buffer) / 2) + 16;\ 1113 eax = 0x12345678;\ 1114 ecx = 17;\ 1115 \ 1116 asm volatile ("pushl $0\n\t"\ 1117 "popf\n\t"\ 1118 DF "\n\t"\ 1119 REP #OP size "\n\t"\ 1120 "cld\n\t"\ 1121 "pushf\n\t"\ 1122 "popl %4\n\t"\ 1123 : "=S" (esi), "=D" (edi), "=a" (eax), "=c" (ecx), "=g" (eflags)\ 1124 : "0" (esi), "1" (edi), "2" (eax), "3" (ecx));\ 1125 printf("%-10s ESI=%08x EDI=%08x EAX=%08x ECX=%08x EFL=%04x\n",\ 1126 REP #OP size, esi, edi, eax, ecx,\ 1127 eflags & (CC_C | CC_P | CC_Z | CC_S | CC_O | CC_A));\ 1128 } 1129 1130 #define TEST_STRING(OP, REP)\ 1131 TEST_STRING1(OP, "b", "", REP);\ 1132 TEST_STRING1(OP, "w", "", REP);\ 1133 TEST_STRING1(OP, "l", "", REP);\ 1134 TEST_STRING1(OP, "b", "std", REP);\ 1135 TEST_STRING1(OP, "w", "std", REP);\ 1136 TEST_STRING1(OP, "l", "std", REP) 1137 1138 void test_string(void) 1139 { 1140 int i; 1141 for(i = 0;i < sizeof(str_buffer); i++) 1142 str_buffer[i] = i + 0x56; 1143 TEST_STRING(stos, ""); 1144 TEST_STRING(stos, "rep "); 1145 TEST_STRING(lods, ""); /* to verify stos */ 1146 TEST_STRING(lods, "rep "); 1147 TEST_STRING(movs, ""); 1148 TEST_STRING(movs, "rep "); 1149 TEST_STRING(lods, ""); /* to verify stos */ 1150 1151 /* XXX: better tests */ 1152 TEST_STRING(scas, ""); 1153 TEST_STRING(scas, "repz "); 1154 TEST_STRING(scas, "repnz "); 1155 TEST_STRING(cmps, ""); 1156 TEST_STRING(cmps, "repz "); 1157 TEST_STRING(cmps, "repnz "); 1158 } 1159 1160 /* VM86 test */ 1161 1162 static inline void set_bit(uint8_t *a, unsigned int bit) 1163 { 1164 a[bit / 8] |= (1 << (bit % 8)); 1165 } 1166 1167 static inline uint8_t *seg_to_linear(unsigned int seg, unsigned int reg) 1168 { 1169 return (uint8_t *)((seg << 4) + (reg & 0xffff)); 1170 } 1171 1172 static inline void pushw(struct vm86_regs *r, int val) 1173 { 1174 r->esp = (r->esp & ~0xffff) | ((r->esp - 2) & 0xffff); 1175 *(uint16_t *)seg_to_linear(r->ss, r->esp) = val; 1176 } 1177 1178 #undef __syscall_return 1179 #define __syscall_return(type, res) \ 1180 do { \ 1181 return (type) (res); \ 1182 } while (0) 1183 1184 _syscall2(int, vm86, int, func, struct vm86plus_struct *, v86) 1185 1186 extern char vm86_code_start; 1187 extern char vm86_code_end; 1188 1189 #define VM86_CODE_CS 0x100 1190 #define VM86_CODE_IP 0x100 1191 1192 void test_vm86(void) 1193 { 1194 struct vm86plus_struct ctx; 1195 struct vm86_regs *r; 1196 uint8_t *vm86_mem; 1197 int seg, ret; 1198 1199 vm86_mem = mmap((void *)0x00000000, 0x110000, 1200 PROT_WRITE | PROT_READ | PROT_EXEC, 1201 MAP_FIXED | MAP_ANON | MAP_PRIVATE, -1, 0); 1202 if (vm86_mem == MAP_FAILED) { 1203 printf("ERROR: could not map vm86 memory"); 1204 return; 1205 } 1206 memset(&ctx, 0, sizeof(ctx)); 1207 1208 /* init basic registers */ 1209 r = &ctx.regs; 1210 r->eip = VM86_CODE_IP; 1211 r->esp = 0xfffe; 1212 seg = VM86_CODE_CS; 1213 r->cs = seg; 1214 r->ss = seg; 1215 r->ds = seg; 1216 r->es = seg; 1217 r->fs = seg; 1218 r->gs = seg; 1219 r->eflags = VIF_MASK; 1220 1221 /* move code to proper address. We use the same layout as a .com 1222 dos program. */ 1223 memcpy(vm86_mem + (VM86_CODE_CS << 4) + VM86_CODE_IP, 1224 &vm86_code_start, &vm86_code_end - &vm86_code_start); 1225 1226 /* mark int 0x21 as being emulated */ 1227 set_bit((uint8_t *)&ctx.int_revectored, 0x21); 1228 1229 for(;;) { 1230 ret = vm86(VM86_ENTER, &ctx); 1231 switch(VM86_TYPE(ret)) { 1232 case VM86_INTx: 1233 { 1234 int int_num, ah, v; 1235 1236 int_num = VM86_ARG(ret); 1237 if (int_num != 0x21) 1238 goto unknown_int; 1239 ah = (r->eax >> 8) & 0xff; 1240 switch(ah) { 1241 case 0x00: /* exit */ 1242 goto the_end; 1243 case 0x02: /* write char */ 1244 { 1245 uint8_t c = r->edx; 1246 putchar(c); 1247 } 1248 break; 1249 case 0x09: /* write string */ 1250 { 1251 uint8_t c, *ptr; 1252 ptr = seg_to_linear(r->ds, r->edx); 1253 for(;;) { 1254 c = *ptr++; 1255 if (c == '$') 1256 break; 1257 putchar(c); 1258 } 1259 r->eax = (r->eax & ~0xff) | '$'; 1260 } 1261 break; 1262 case 0xff: /* extension: write eflags number in edx */ 1263 v = (int)r->edx; 1264 #ifndef LINUX_VM86_IOPL_FIX 1265 v &= ~0x3000; 1266 #endif 1267 printf("%08x\n", v); 1268 break; 1269 default: 1270 unknown_int: 1271 printf("unsupported int 0x%02x\n", int_num); 1272 goto the_end; 1273 } 1274 } 1275 break; 1276 case VM86_SIGNAL: 1277 /* a signal came, we just ignore that */ 1278 break; 1279 case VM86_STI: 1280 break; 1281 default: 1282 printf("ERROR: unhandled vm86 return code (0x%x)\n", ret); 1283 goto the_end; 1284 } 1285 } 1286 the_end: 1287 printf("VM86 end\n"); 1288 munmap(vm86_mem, 0x110000); 1289 } 1290 1291 /* exception tests */ 1292 #ifndef REG_EAX 1293 #define REG_EAX EAX 1294 #define REG_EBX EBX 1295 #define REG_ECX ECX 1296 #define REG_EDX EDX 1297 #define REG_ESI ESI 1298 #define REG_EDI EDI 1299 #define REG_EBP EBP 1300 #define REG_ESP ESP 1301 #define REG_EIP EIP 1302 #define REG_EFL EFL 1303 #define REG_TRAPNO TRAPNO 1304 #define REG_ERR ERR 1305 #endif 1306 1307 jmp_buf jmp_env; 1308 int v1; 1309 int tab[2]; 1310 1311 void sig_handler(int sig, siginfo_t *info, void *puc) 1312 { 1313 struct ucontext *uc = puc; 1314 1315 printf("si_signo=%d si_errno=%d si_code=%d", 1316 info->si_signo, info->si_errno, info->si_code); 1317 printf(" si_addr=0x%08lx", 1318 (unsigned long)info->si_addr); 1319 printf("\n"); 1320 1321 printf("trapno=0x%02x err=0x%08x", 1322 uc->uc_mcontext.gregs[REG_TRAPNO], 1323 uc->uc_mcontext.gregs[REG_ERR]); 1324 printf(" EIP=0x%08x", uc->uc_mcontext.gregs[REG_EIP]); 1325 printf("\n"); 1326 longjmp(jmp_env, 1); 1327 } 1328 1329 void test_exceptions(void) 1330 { 1331 struct modify_ldt_ldt_s ldt; 1332 struct sigaction act; 1333 volatile int val; 1334 1335 act.sa_sigaction = sig_handler; 1336 sigemptyset(&act.sa_mask); 1337 act.sa_flags = SA_SIGINFO; 1338 sigaction(SIGFPE, &act, NULL); 1339 sigaction(SIGILL, &act, NULL); 1340 sigaction(SIGSEGV, &act, NULL); 1341 sigaction(SIGBUS, &act, NULL); 1342 sigaction(SIGTRAP, &act, NULL); 1343 1344 /* test division by zero reporting */ 1345 printf("DIVZ exception:\n"); 1346 if (setjmp(jmp_env) == 0) { 1347 /* now divide by zero */ 1348 v1 = 0; 1349 v1 = 2 / v1; 1350 } 1351 1352 printf("BOUND exception:\n"); 1353 if (setjmp(jmp_env) == 0) { 1354 /* bound exception */ 1355 tab[0] = 1; 1356 tab[1] = 10; 1357 asm volatile ("bound %0, %1" : : "r" (11), "m" (tab)); 1358 } 1359 1360 printf("segment exceptions:\n"); 1361 if (setjmp(jmp_env) == 0) { 1362 /* load an invalid segment */ 1363 asm volatile ("movl %0, %%fs" : : "r" ((0x1234 << 3) | 1)); 1364 } 1365 if (setjmp(jmp_env) == 0) { 1366 /* null data segment is valid */ 1367 asm volatile ("movl %0, %%fs" : : "r" (3)); 1368 /* null stack segment */ 1369 asm volatile ("movl %0, %%ss" : : "r" (3)); 1370 } 1371 1372 ldt.entry_number = 1; 1373 ldt.base_addr = (unsigned long)&seg_data1; 1374 ldt.limit = (sizeof(seg_data1) + 0xfff) >> 12; 1375 ldt.seg_32bit = 1; 1376 ldt.contents = MODIFY_LDT_CONTENTS_DATA; 1377 ldt.read_exec_only = 0; 1378 ldt.limit_in_pages = 1; 1379 ldt.seg_not_present = 1; 1380 ldt.useable = 1; 1381 modify_ldt(1, &ldt, sizeof(ldt)); /* write ldt entry */ 1382 1383 if (setjmp(jmp_env) == 0) { 1384 /* segment not present */ 1385 asm volatile ("movl %0, %%fs" : : "r" (MK_SEL(1))); 1386 } 1387 1388 /* test SEGV reporting */ 1389 printf("PF exception:\n"); 1390 if (setjmp(jmp_env) == 0) { 1391 val = 1; 1392 /* we add a nop to test a weird PC retrieval case */ 1393 asm volatile ("nop"); 1394 /* now store in an invalid address */ 1395 *(char *)0x1234 = 1; 1396 } 1397 1398 /* test SEGV reporting */ 1399 printf("PF exception:\n"); 1400 if (setjmp(jmp_env) == 0) { 1401 val = 1; 1402 /* read from an invalid address */ 1403 v1 = *(char *)0x1234; 1404 } 1405 1406 /* test illegal instruction reporting */ 1407 printf("UD2 exception:\n"); 1408 if (setjmp(jmp_env) == 0) { 1409 /* now execute an invalid instruction */ 1410 asm volatile("ud2"); 1411 } 1412 printf("lock nop exception:\n"); 1413 if (setjmp(jmp_env) == 0) { 1414 /* now execute an invalid instruction */ 1415 asm volatile("lock nop"); 1416 } 1417 1418 printf("INT exception:\n"); 1419 if (setjmp(jmp_env) == 0) { 1420 asm volatile ("int $0xfd"); 1421 } 1422 if (setjmp(jmp_env) == 0) { 1423 asm volatile ("int $0x01"); 1424 } 1425 if (setjmp(jmp_env) == 0) { 1426 asm volatile (".byte 0xcd, 0x03"); 1427 } 1428 if (setjmp(jmp_env) == 0) { 1429 asm volatile ("int $0x04"); 1430 } 1431 if (setjmp(jmp_env) == 0) { 1432 asm volatile ("int $0x05"); 1433 } 1434 1435 printf("INT3 exception:\n"); 1436 if (setjmp(jmp_env) == 0) { 1437 asm volatile ("int3"); 1438 } 1439 1440 printf("CLI exception:\n"); 1441 if (setjmp(jmp_env) == 0) { 1442 asm volatile ("cli"); 1443 } 1444 1445 printf("STI exception:\n"); 1446 if (setjmp(jmp_env) == 0) { 1447 asm volatile ("cli"); 1448 } 1449 1450 printf("INTO exception:\n"); 1451 if (setjmp(jmp_env) == 0) { 1452 /* overflow exception */ 1453 asm volatile ("addl $1, %0 ; into" : : "r" (0x7fffffff)); 1454 } 1455 1456 printf("OUTB exception:\n"); 1457 if (setjmp(jmp_env) == 0) { 1458 asm volatile ("outb %%al, %%dx" : : "d" (0x4321), "a" (0)); 1459 } 1460 1461 printf("INB exception:\n"); 1462 if (setjmp(jmp_env) == 0) { 1463 asm volatile ("inb %%dx, %%al" : "=a" (val) : "d" (0x4321)); 1464 } 1465 1466 printf("REP OUTSB exception:\n"); 1467 if (setjmp(jmp_env) == 0) { 1468 asm volatile ("rep outsb" : : "d" (0x4321), "S" (tab), "c" (1)); 1469 } 1470 1471 printf("REP INSB exception:\n"); 1472 if (setjmp(jmp_env) == 0) { 1473 asm volatile ("rep insb" : : "d" (0x4321), "D" (tab), "c" (1)); 1474 } 1475 1476 printf("HLT exception:\n"); 1477 if (setjmp(jmp_env) == 0) { 1478 asm volatile ("hlt"); 1479 } 1480 1481 printf("single step exception:\n"); 1482 val = 0; 1483 if (setjmp(jmp_env) == 0) { 1484 asm volatile ("pushf\n" 1485 "orl $0x00100, (%%esp)\n" 1486 "popf\n" 1487 "movl $0xabcd, %0\n" 1488 "movl $0x0, %0\n" : "=m" (val) : : "cc", "memory"); 1489 } 1490 printf("val=0x%x\n", val); 1491 } 1492 1493 /* specific precise single step test */ 1494 void sig_trap_handler(int sig, siginfo_t *info, void *puc) 1495 { 1496 struct ucontext *uc = puc; 1497 printf("EIP=0x%08x\n", uc->uc_mcontext.gregs[REG_EIP]); 1498 } 1499 1500 const uint8_t sstep_buf1[4] = { 1, 2, 3, 4}; 1501 uint8_t sstep_buf2[4]; 1502 1503 void test_single_step(void) 1504 { 1505 struct sigaction act; 1506 volatile int val; 1507 int i; 1508 1509 val = 0; 1510 act.sa_sigaction = sig_trap_handler; 1511 sigemptyset(&act.sa_mask); 1512 act.sa_flags = SA_SIGINFO; 1513 sigaction(SIGTRAP, &act, NULL); 1514 asm volatile ("pushf\n" 1515 "orl $0x00100, (%%esp)\n" 1516 "popf\n" 1517 "movl $0xabcd, %0\n" 1518 1519 /* jmp test */ 1520 "movl $3, %%ecx\n" 1521 "1:\n" 1522 "addl $1, %0\n" 1523 "decl %%ecx\n" 1524 "jnz 1b\n" 1525 1526 /* movsb: the single step should stop at each movsb iteration */ 1527 "movl $sstep_buf1, %%esi\n" 1528 "movl $sstep_buf2, %%edi\n" 1529 "movl $0, %%ecx\n" 1530 "rep movsb\n" 1531 "movl $3, %%ecx\n" 1532 "rep movsb\n" 1533 "movl $1, %%ecx\n" 1534 "rep movsb\n" 1535 1536 /* cmpsb: the single step should stop at each cmpsb iteration */ 1537 "movl $sstep_buf1, %%esi\n" 1538 "movl $sstep_buf2, %%edi\n" 1539 "movl $0, %%ecx\n" 1540 "rep cmpsb\n" 1541 "movl $4, %%ecx\n" 1542 "rep cmpsb\n" 1543 1544 /* getpid() syscall: single step should skip one 1545 instruction */ 1546 "movl $20, %%eax\n" 1547 "int $0x80\n" 1548 "movl $0, %%eax\n" 1549 1550 /* when modifying SS, trace is not done on the next 1551 instruction */ 1552 "movl %%ss, %%ecx\n" 1553 "movl %%ecx, %%ss\n" 1554 "addl $1, %0\n" 1555 "movl $1, %%eax\n" 1556 "movl %%ecx, %%ss\n" 1557 "jmp 1f\n" 1558 "addl $1, %0\n" 1559 "1:\n" 1560 "movl $1, %%eax\n" 1561 "pushl %%ecx\n" 1562 "popl %%ss\n" 1563 "addl $1, %0\n" 1564 "movl $1, %%eax\n" 1565 1566 "pushf\n" 1567 "andl $~0x00100, (%%esp)\n" 1568 "popf\n" 1569 : "=m" (val) 1570 : 1571 : "cc", "memory", "eax", "ecx", "esi", "edi"); 1572 printf("val=%d\n", val); 1573 for(i = 0; i < 4; i++) 1574 printf("sstep_buf2[%d] = %d\n", i, sstep_buf2[i]); 1575 } 1576 1577 /* self modifying code test */ 1578 uint8_t code[] = { 1579 0xb8, 0x1, 0x00, 0x00, 0x00, /* movl $1, %eax */ 1580 0xc3, /* ret */ 1581 }; 1582 1583 asm("smc_code2:\n" 1584 "movl 4(%esp), %eax\n" 1585 "movl %eax, smc_patch_addr2 + 1\n" 1586 "nop\n" 1587 "nop\n" 1588 "nop\n" 1589 "nop\n" 1590 "nop\n" 1591 "nop\n" 1592 "nop\n" 1593 "nop\n" 1594 "smc_patch_addr2:\n" 1595 "movl $1, %eax\n" 1596 "ret\n"); 1597 1598 typedef int FuncType(void); 1599 extern int smc_code2(int); 1600 void test_self_modifying_code(void) 1601 { 1602 int i; 1603 1604 printf("self modifying code:\n"); 1605 printf("func1 = 0x%x\n", ((FuncType *)code)()); 1606 for(i = 2; i <= 4; i++) { 1607 code[1] = i; 1608 printf("func%d = 0x%x\n", i, ((FuncType *)code)()); 1609 } 1610 1611 /* more difficult test : the modified code is just after the 1612 modifying instruction. It is forbidden in Intel specs, but it 1613 is used by old DOS programs */ 1614 for(i = 2; i <= 4; i++) { 1615 printf("smc_code2(%d) = %d\n", i, smc_code2(i)); 1616 } 1617 } 1618 1619 static void *call_end __init_call = NULL; 1620 1621 int main(int argc, char **argv) 1622 { 1623 void **ptr; 1624 void (*func)(void); 1625 1626 ptr = &call_start + 1; 1627 while (*ptr != NULL) { 1628 func = *ptr++; 1629 func(); 1630 } 1631 test_bsx(); 1632 test_mul(); 1633 test_jcc(); 1634 test_floats(); 1635 test_bcd(); 1636 test_xchg(); 1637 test_string(); 1638 test_misc(); 1639 test_lea(); 1640 test_segs(); 1641 test_code16(); 1642 test_vm86(); 1643 test_exceptions(); 1644 test_self_modifying_code(); 1645 test_single_step(); 1646 return 0; 1647 } 1648