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