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/* Setting this to 1 creates a very comprehensive test of 34 integer condition codes. */ 35#define TEST_INTEGER_VERBOSE 1 36 37 38//#define LINUX_VM86_IOPL_FIX 39//#define TEST_P4_FLAGS 40 41#define xglue(x, y) x ## y 42#define glue(x, y) xglue(x, y) 43#define stringify(s) tostring(s) 44#define tostring(s) #s 45 46#define CC_C 0x0001 47#define CC_P 0x0004 48#define CC_A 0x0010 49#define CC_Z 0x0040 50#define CC_S 0x0080 51#define CC_O 0x0800 52 53#define __init_call __attribute__ ((unused,__section__ (".initcall.init"))) 54 55static void *call_start __init_call = NULL; 56 57#define CC_MASK (CC_C | CC_P | CC_Z | CC_S | CC_O | CC_A) 58 59#define OP add 60#include "test-i386.h" 61 62#define OP sub 63#include "test-i386.h" 64 65#define OP xor 66#include "test-i386.h" 67 68#define OP and 69#include "test-i386.h" 70 71#define OP or 72#include "test-i386.h" 73 74#define OP cmp 75#include "test-i386.h" 76 77#define OP adc 78#define OP_CC 79#include "test-i386.h" 80 81#define OP sbb 82#define OP_CC 83#include "test-i386.h" 84 85#define OP inc 86#define OP_CC 87#define OP1 88#include "test-i386.h" 89 90#define OP dec 91#define OP_CC 92#define OP1 93#include "test-i386.h" 94 95#define OP neg 96#define OP_CC 97#define OP1 98#include "test-i386.h" 99 100#define OP not 101#define OP_CC 102#define OP1 103#include "test-i386.h" 104 105#undef CC_MASK 106#define CC_MASK (CC_C | CC_P | CC_Z | CC_S | CC_O) 107 108#define OP shl 109#include "test-i386-shift.h" 110 111#define OP shr 112#include "test-i386-shift.h" 113 114#define OP sar 115#include "test-i386-shift.h" 116 117#define OP rol 118#include "test-i386-shift.h" 119 120#define OP ror 121#include "test-i386-shift.h" 122 123#define OP rcr 124#define OP_CC 125#include "test-i386-shift.h" 126 127#define OP rcl 128#define OP_CC 129#include "test-i386-shift.h" 130 131#define OP shld 132#define OP_SHIFTD 133#define OP_NOBYTE 134#include "test-i386-shift.h" 135 136#define OP shrd 137#define OP_SHIFTD 138#define OP_NOBYTE 139#include "test-i386-shift.h" 140 141 142/* XXX: should be more precise ? */ 143#undef CC_MASK 144#define CC_MASK (CC_C) 145 146#define OP bt 147#define OP_NOBYTE 148#include "test-i386-shift.h" 149 150#define OP bts 151#define OP_NOBYTE 152#include "test-i386-shift.h" 153 154#define OP btr 155#define OP_NOBYTE 156#include "test-i386-shift.h" 157 158#define OP btc 159#define OP_NOBYTE 160#include "test-i386-shift.h" 161 162 163/* lea test (modrm support) */ 164#define TEST_LEA(STR)\ 165{\ 166 asm("leal " STR ", %0"\ 167 : "=r" (res)\ 168 : "a" (eax), "b" (ebx), "c" (ecx), "d" (edx), "S" (esi), "D" (edi));\ 169 printf("lea %s = %08x\n", STR, res);\ 170} 171 172#define TEST_LEA16(STR)\ 173{\ 174 asm(".code16 ; .byte 0x67 ; leal " STR ", %0 ; .code32"\ 175 : "=wq" (res)\ 176 : "a" (eax), "b" (ebx), "c" (ecx), "d" (edx), "S" (esi), "D" (edi));\ 177 printf("lea %s = %08x\n", STR, res);\ 178} 179 180 181void test_lea(void) 182{ 183 int eax, ebx, ecx, edx, esi, edi, res; 184 eax = 0x0001; 185 ebx = 0x0002; 186 ecx = 0x0004; 187 edx = 0x0008; 188 esi = 0x0010; 189 edi = 0x0020; 190 191 TEST_LEA("0x4000"); 192 193 TEST_LEA("(%%eax)"); 194 TEST_LEA("(%%ebx)"); 195 TEST_LEA("(%%ecx)"); 196 TEST_LEA("(%%edx)"); 197 TEST_LEA("(%%esi)"); 198 TEST_LEA("(%%edi)"); 199 200 TEST_LEA("0x40(%%eax)"); 201 TEST_LEA("0x40(%%ebx)"); 202 TEST_LEA("0x40(%%ecx)"); 203 TEST_LEA("0x40(%%edx)"); 204 TEST_LEA("0x40(%%esi)"); 205 TEST_LEA("0x40(%%edi)"); 206 207 TEST_LEA("0x4000(%%eax)"); 208 TEST_LEA("0x4000(%%ebx)"); 209 TEST_LEA("0x4000(%%ecx)"); 210 TEST_LEA("0x4000(%%edx)"); 211 TEST_LEA("0x4000(%%esi)"); 212 TEST_LEA("0x4000(%%edi)"); 213 214 TEST_LEA("(%%eax, %%ecx)"); 215 TEST_LEA("(%%ebx, %%edx)"); 216 TEST_LEA("(%%ecx, %%ecx)"); 217 TEST_LEA("(%%edx, %%ecx)"); 218 TEST_LEA("(%%esi, %%ecx)"); 219 TEST_LEA("(%%edi, %%ecx)"); 220 221 TEST_LEA("0x40(%%eax, %%ecx)"); 222 TEST_LEA("0x4000(%%ebx, %%edx)"); 223 224 TEST_LEA("(%%ecx, %%ecx, 2)"); 225 TEST_LEA("(%%edx, %%ecx, 4)"); 226 TEST_LEA("(%%esi, %%ecx, 8)"); 227 228 TEST_LEA("(,%%eax, 2)"); 229 TEST_LEA("(,%%ebx, 4)"); 230 TEST_LEA("(,%%ecx, 8)"); 231 232 TEST_LEA("0x40(,%%eax, 2)"); 233 TEST_LEA("0x40(,%%ebx, 4)"); 234 TEST_LEA("0x40(,%%ecx, 8)"); 235 236 237 TEST_LEA("-10(%%ecx, %%ecx, 2)"); 238 TEST_LEA("-10(%%edx, %%ecx, 4)"); 239 TEST_LEA("-10(%%esi, %%ecx, 8)"); 240 241 TEST_LEA("0x4000(%%ecx, %%ecx, 2)"); 242 TEST_LEA("0x4000(%%edx, %%ecx, 4)"); 243 TEST_LEA("0x4000(%%esi, %%ecx, 8)"); 244} 245 246#define TEST_JCC(JCC, v1, v2)\ 247{\ 248 int res;\ 249 asm("movl $1, %0\n\t"\ 250 "cmpl %2, %1\n\t"\ 251 "j" JCC " 1f\n\t"\ 252 "movl $0, %0\n\t"\ 253 "1:\n\t"\ 254 : "=r" (res)\ 255 : "r" (v1), "r" (v2));\ 256 printf("%-10s %d\n", "j" JCC, res);\ 257\ 258 asm("movl $0, %0\n\t"\ 259 "cmpl %2, %1\n\t"\ 260 "set" JCC " %b0\n\t"\ 261 : "=r" (res)\ 262 : "r" (v1), "r" (v2));\ 263 printf("%-10s %d\n", "set" JCC, res);\ 264 { int one = 1; \ 265 asm("movl $0x12345678, %0\n\t"\ 266 "cmpl %2, %1\n\t"\ 267 "cmov" JCC "l %3, %0\n\t"\ 268 : "=r" (res)\ 269 : "r" (v1), "r" (v2), "m" (one));\ 270 printf("%-10s R=0x%08x\n", "cmov" JCC "l", res);\ 271 asm("movl $0x12345678, %0\n\t"\ 272 "cmpl %2, %1\n\t"\ 273 "cmov" JCC "w %w3, %w0\n\t"\ 274 : "=r" (res)\ 275 : "r" (v1), "r" (v2), "r" (1));\ 276 printf("%-10s R=0x%08x\n", "cmov" JCC "w", res);\ 277 } \ 278} 279 280/* various jump tests */ 281void test_jcc(void) 282{ 283 TEST_JCC("ne", 1, 1); 284 TEST_JCC("ne", 1, 0); 285 286 TEST_JCC("e", 1, 1); 287 TEST_JCC("e", 1, 0); 288 289 TEST_JCC("l", 1, 1); 290 TEST_JCC("l", 1, 0); 291 TEST_JCC("l", 1, -1); 292 293 TEST_JCC("le", 1, 1); 294 TEST_JCC("le", 1, 0); 295 TEST_JCC("le", 1, -1); 296 297 TEST_JCC("ge", 1, 1); 298 TEST_JCC("ge", 1, 0); 299 TEST_JCC("ge", -1, 1); 300 301 TEST_JCC("g", 1, 1); 302 TEST_JCC("g", 1, 0); 303 TEST_JCC("g", 1, -1); 304 305 TEST_JCC("b", 1, 1); 306 TEST_JCC("b", 1, 0); 307 TEST_JCC("b", 1, -1); 308 309 TEST_JCC("be", 1, 1); 310 TEST_JCC("be", 1, 0); 311 TEST_JCC("be", 1, -1); 312 313 TEST_JCC("ae", 1, 1); 314 TEST_JCC("ae", 1, 0); 315 TEST_JCC("ae", 1, -1); 316 317 TEST_JCC("a", 1, 1); 318 TEST_JCC("a", 1, 0); 319 TEST_JCC("a", 1, -1); 320 321 322 TEST_JCC("p", 1, 1); 323 TEST_JCC("p", 1, 0); 324 325 TEST_JCC("np", 1, 1); 326 TEST_JCC("np", 1, 0); 327 328 TEST_JCC("o", 0x7fffffff, 0); 329 TEST_JCC("o", 0x7fffffff, -1); 330 331 TEST_JCC("no", 0x7fffffff, 0); 332 TEST_JCC("no", 0x7fffffff, -1); 333 334 TEST_JCC("s", 0, 1); 335 TEST_JCC("s", 0, -1); 336 TEST_JCC("s", 0, 0); 337 338 TEST_JCC("ns", 0, 1); 339 TEST_JCC("ns", 0, -1); 340 TEST_JCC("ns", 0, 0); 341} 342 343#undef CC_MASK 344#ifdef TEST_P4_FLAGS 345#define CC_MASK (CC_C | CC_P | CC_Z | CC_S | CC_O | CC_A) 346#else 347#define CC_MASK (CC_O | CC_C) 348#endif 349 350#define OP mul 351#include "test-i386-muldiv.h" 352 353#define OP imul 354#include "test-i386-muldiv.h" 355 356void test_imulw2(int op0, int op1) 357{ 358 int res, s1, s0, flags; 359 s0 = op0; 360 s1 = op1; 361 res = s0; 362 flags = 0; 363 asm ("push %4\n\t" 364 "popf\n\t" 365 "imulw %w2, %w0\n\t" 366 "pushf\n\t" 367 "popl %1\n\t" 368 : "=q" (res), "=g" (flags) 369 : "q" (s1), "0" (res), "1" (flags)); 370 printf("%-10s A=%08x B=%08x R=%08x CC=%04x\n", 371 "imulw", s0, s1, res, flags & CC_MASK); 372} 373 374void test_imull2(int op0, int op1) 375{ 376 int res, s1, s0, flags; 377 s0 = op0; 378 s1 = op1; 379 res = s0; 380 flags = 0; 381 asm ("push %4\n\t" 382 "popf\n\t" 383 "imull %2, %0\n\t" 384 "pushf\n\t" 385 "popl %1\n\t" 386 : "=q" (res), "=g" (flags) 387 : "q" (s1), "0" (res), "1" (flags)); 388 printf("%-10s A=%08x B=%08x R=%08x CC=%04x\n", 389 "imull", s0, s1, res, flags & CC_MASK); 390} 391 392#define TEST_IMUL_IM(size, size1, op0, op1)\ 393{\ 394 int res, flags;\ 395 flags = 0;\ 396 res = 0;\ 397 asm ("push %3\n\t"\ 398 "popf\n\t"\ 399 "imul" size " $" #op0 ", %" size1 "2, %" size1 "0\n\t" \ 400 "pushf\n\t"\ 401 "popl %1\n\t"\ 402 : "=r" (res), "=g" (flags)\ 403 : "r" (op1), "1" (flags), "0" (res));\ 404 printf("%-10s A=%08x B=%08x R=%08x CC=%04x\n",\ 405 "imul" size, op0, op1, res, flags & CC_MASK);\ 406} 407 408 409#undef CC_MASK 410#define CC_MASK (0) 411 412#define OP div 413#include "test-i386-muldiv.h" 414 415#define OP idiv 416#include "test-i386-muldiv.h" 417 418void test_mul(void) 419{ 420 test_imulb(0x1234561d, 4); 421 test_imulb(3, -4); 422 test_imulb(0x80, 0x80); 423 test_imulb(0x10, 0x10); 424 425 test_imulw(0, 0, 0); 426 test_imulw(0, 0xFF, 0xFF); 427 test_imulw(0, 0xFF, 0x100); 428 test_imulw(0, 0x1234001d, 45); 429 test_imulw(0, 23, -45); 430 test_imulw(0, 0x8000, 0x8000); 431 test_imulw(0, 0x100, 0x100); 432 433 test_imull(0, 0, 0); 434 test_imull(0, 0xFFFF, 0xFFFF); 435 test_imull(0, 0xFFFF, 0x10000); 436 test_imull(0, 0x1234001d, 45); 437 test_imull(0, 23, -45); 438 test_imull(0, 0x80000000, 0x80000000); 439 test_imull(0, 0x10000, 0x10000); 440 441 test_mulb(0x1234561d, 4); 442 test_mulb(3, -4); 443 test_mulb(0x80, 0x80); 444 test_mulb(0x10, 0x10); 445 446 test_mulw(0, 0x1234001d, 45); 447 test_mulw(0, 23, -45); 448 test_mulw(0, 0x8000, 0x8000); 449 test_mulw(0, 0x100, 0x100); 450 451 test_mull(0, 0x1234001d, 45); 452 test_mull(0, 23, -45); 453 test_mull(0, 0x80000000, 0x80000000); 454 test_mull(0, 0x10000, 0x10000); 455 456 test_imulw2(0x1234001d, 45); 457 test_imulw2(23, -45); 458 test_imulw2(0x8000, 0x8000); 459 test_imulw2(0x100, 0x100); 460 461 test_imull2(0x1234001d, 45); 462 test_imull2(23, -45); 463 test_imull2(0x80000000, 0x80000000); 464 test_imull2(0x10000, 0x10000); 465 466 TEST_IMUL_IM("w", "w", 45, 0x1234); 467 TEST_IMUL_IM("w", "w", -45, 23); 468 TEST_IMUL_IM("w", "w", 0x8000, 0x80000000); 469 TEST_IMUL_IM("w", "w", 0x7fff, 0x1000); 470 471 TEST_IMUL_IM("l", "", 45, 0x1234); 472 TEST_IMUL_IM("l", "", -45, 23); 473 TEST_IMUL_IM("l", "", 0x8000, 0x80000000); 474 TEST_IMUL_IM("l", "", 0x7fff, 0x1000); 475 476 test_idivb(0x12341678, 0x127e); 477 test_idivb(0x43210123, -5); 478 test_idivb(0x12340004, -1); 479 480 test_idivw(0, 0x12345678, 12347); 481 test_idivw(0, -23223, -45); 482 test_idivw(0, 0x12348000, -1); 483 test_idivw(0x12343, 0x12345678, 0x81238567); 484 485 test_idivl(0, 0x12345678, 12347); 486 test_idivl(0, -233223, -45); 487 test_idivl(0, 0x80000000, -1); 488 test_idivl(0x12343, 0x12345678, 0x81234567); 489 490 test_divb(0x12341678, 0x127e); 491 test_divb(0x43210123, -5); 492 test_divb(0x12340004, -1); 493 494 test_divw(0, 0x12345678, 12347); 495 test_divw(0, -23223, -45); 496 test_divw(0, 0x12348000, -1); 497 test_divw(0x12343, 0x12345678, 0x81238567); 498 499 test_divl(0, 0x12345678, 12347); 500 test_divl(0, -233223, -45); 501 test_divl(0, 0x80000000, -1); 502 test_divl(0x12343, 0x12345678, 0x81234567); 503} 504 505#define TEST_BSX(op, size, op0)\ 506{\ 507 int res, val, resz;\ 508 val = op0;\ 509 asm("xorl %1, %1\n\t"\ 510 "movl $0x12345678, %0\n\t"\ 511 #op " %" size "2, %" size "0\n\t" \ 512 "setz %b1" \ 513 : "=r" (res), "=q" (resz)\ 514 : "r" (val));\ 515 printf("%-10s A=%08x R=%08x %d\n", #op, val, res, resz);\ 516} 517 518void test_bsx(void) 519{ 520 TEST_BSX(bsrw, "w", 0); 521 TEST_BSX(bsrw, "w", 0x12340128); 522 TEST_BSX(bsrl, "", 0); 523 TEST_BSX(bsrl, "", 0x00340128); 524 TEST_BSX(bsfw, "w", 0); 525 TEST_BSX(bsfw, "w", 0x12340128); 526 TEST_BSX(bsfl, "", 0); 527 TEST_BSX(bsfl, "", 0x00340128); 528} 529 530/**********************************************/ 531 532void test_fops(double a, double b) 533{ 534 printf("a=%f b=%f a+b=%f\n", a, b, a + b); 535 printf("a=%f b=%f a-b=%f\n", a, b, a - b); 536 printf("a=%f b=%f a*b=%f\n", a, b, a * b); 537 printf("a=%f b=%f a/b=%f\n", a, b, a / b); 538 printf("a=%f b=%f fmod(a, b)=%f\n", a, b, fmod(a, b)); 539 printf("a=%f sqrt(a)=%f\n", a, sqrt(a)); 540 printf("a=%f sin(a)=%f\n", a, sin(a)); 541 printf("a=%f cos(a)=%f\n", a, cos(a)); 542 printf("a=%f tan(a)=%f\n", a, tan(a)); 543 printf("a=%f log(a)=%f\n", a, log(a)); 544 printf("a=%f exp(a)=%f\n", a, exp(a)); 545 printf("a=%f b=%f atan2(a, b)=%f\n", a, b, atan2(a, b)); 546 /* just to test some op combining */ 547 printf("a=%f asin(sin(a))=%f\n", a, asin(sin(a))); 548 printf("a=%f acos(cos(a))=%f\n", a, acos(cos(a))); 549 printf("a=%f atan(tan(a))=%f\n", a, atan(tan(a))); 550} 551 552void test_fcmp(double a, double b) 553{ 554 printf("(%f<%f)=%d\n", 555 a, b, a < b); 556 printf("(%f<=%f)=%d\n", 557 a, b, a <= b); 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 { 565 unsigned int eflags; 566 /* test f(u)comi instruction */ 567 asm("fcomi %2, %1\n" 568 "pushf\n" 569 "pop %0\n" 570 : "=r" (eflags) 571 : "t" (a), "u" (b)); 572 printf("fcomi(%f %f)=%08x\n", a, b, eflags & (CC_Z | CC_P | CC_C)); 573 } 574} 575 576void test_fcvt(double a) 577{ 578 float fa; 579 long double la; 580 int16_t fpuc; 581 int i; 582 int64_t lla; 583 int ia; 584 int16_t wa; 585 double ra; 586 587 fa = a; 588 la = a; 589 printf("(float)%f = %f\n", a, fa); 590 printf("(long double)%f = %Lf\n", a, la); 591 printf("a=%016Lx\n", *(long long *)&a); 592 printf("la=%016Lx %04x\n", *(long long *)&la, 593 *(unsigned short *)((char *)(&la) + 8)); 594 595 /* test all roundings */ 596 asm volatile ("fstcw %0" : "=m" (fpuc)); 597 for(i=0;i<4;i++) { 598 int16_t tmp = (fpuc & ~0x0c00) | (i << 10); 599 asm volatile ("fldcw %0" : : "m" (tmp)); 600 asm volatile ("fist %0" : "=m" (wa) : "t" (a)); 601 asm volatile ("fistl %0" : "=m" (ia) : "t" (a)); 602 asm volatile ("fistpll %0" : "=m" (lla) : "t" (a) : "st"); 603 asm volatile ("frndint ; fstl %0" : "=m" (ra) : "t" (a)); 604 asm volatile ("fldcw %0" : : "m" (fpuc)); 605 printf("(short)a = %d\n", wa); 606 printf("(int)a = %d\n", ia); 607 printf("(int64_t)a = %Ld\n", lla); 608 printf("rint(a) = %f\n", ra); 609 } 610} 611 612#define TEST(N) \ 613 asm("fld" #N : "=t" (a)); \ 614 printf("fld" #N "= %f\n", a); 615 616void test_fconst(void) 617{ 618 double a; 619 TEST(1); 620 TEST(l2t); 621 TEST(l2e); 622 TEST(pi); 623 TEST(lg2); 624 TEST(ln2); 625 TEST(z); 626} 627 628void test_fbcd(double a) 629{ 630 unsigned short bcd[5]; 631 double b; 632 633 asm("fbstp %0" : "=m" (bcd[0]) : "t" (a) : "st"); 634 asm("fbld %1" : "=t" (b) : "m" (bcd[0])); 635 printf("a=%f bcd=%04x%04x%04x%04x%04x b=%f\n", 636 a, bcd[4], bcd[3], bcd[2], bcd[1], bcd[0], b); 637} 638 639#define TEST_ENV(env, save, restore)\ 640{\ 641 memset((env), 0xaa, sizeof(*(env)));\ 642 for(i=0;i<5;i++)\ 643 asm volatile ("fldl %0" : : "m" (dtab[i]));\ 644 asm(save " %0\n" : : "m" (*(env)));\ 645 asm(restore " %0\n": : "m" (*(env)));\ 646 for(i=0;i<5;i++)\ 647 asm volatile ("fstpl %0" : "=m" (rtab[i]));\ 648 for(i=0;i<5;i++)\ 649 printf("res[%d]=%f\n", i, rtab[i]);\ 650 printf("fpuc=%04x fpus=%04x fptag=%04x\n",\ 651 (env)->fpuc,\ 652 (env)->fpus & 0xff00,\ 653 (env)->fptag);\ 654} 655 656void test_fenv(void) 657{ 658 struct __attribute__((packed)) { 659 uint16_t fpuc; 660 uint16_t dummy1; 661 uint16_t fpus; 662 uint16_t dummy2; 663 uint16_t fptag; 664 uint16_t dummy3; 665 uint32_t ignored[4]; 666 long double fpregs[8]; 667 } float_env32; 668 struct __attribute__((packed)) { 669 uint16_t fpuc; 670 uint16_t fpus; 671 uint16_t fptag; 672 uint16_t ignored[4]; 673 long double fpregs[8]; 674 } float_env16; 675 double dtab[8]; 676 double rtab[8]; 677 int i; 678 679 for(i=0;i<8;i++) 680 dtab[i] = i + 1; 681 682 TEST_ENV(&float_env16, "data16 fnstenv", "data16 fldenv"); 683 TEST_ENV(&float_env16, "data16 fnsave", "data16 frstor"); 684 TEST_ENV(&float_env32, "fnstenv", "fldenv"); 685 TEST_ENV(&float_env32, "fnsave", "frstor"); 686 687 /* test for ffree */ 688 for(i=0;i<5;i++) 689 asm volatile ("fldl %0" : : "m" (dtab[i])); 690 asm volatile("ffree %st(2)"); 691 asm volatile ("fnstenv %0\n" : : "m" (float_env32)); 692 asm volatile ("fninit"); 693 printf("fptag=%04x\n", float_env32.fptag); 694} 695 696 697#define TEST_FCMOV(a, b, eflags, CC)\ 698{\ 699 double res;\ 700 asm("push %3\n"\ 701 "popf\n"\ 702 "fcmov" CC " %2, %0\n"\ 703 : "=t" (res)\ 704 : "0" (a), "u" (b), "g" (eflags));\ 705 printf("fcmov%s eflags=0x%04x-> %f\n", \ 706 CC, eflags, res);\ 707} 708 709void test_fcmov(void) 710{ 711 double a, b; 712 int eflags, i; 713 714 a = 1.0; 715 b = 2.0; 716 for(i = 0; i < 4; i++) { 717 eflags = 0; 718 if (i & 1) 719 eflags |= CC_C; 720 if (i & 2) 721 eflags |= CC_Z; 722 TEST_FCMOV(a, b, eflags, "b"); 723 TEST_FCMOV(a, b, eflags, "e"); 724 TEST_FCMOV(a, b, eflags, "be"); 725 TEST_FCMOV(a, b, eflags, "nb"); 726 TEST_FCMOV(a, b, eflags, "ne"); 727 TEST_FCMOV(a, b, eflags, "nbe"); 728 } 729 TEST_FCMOV(a, b, 0, "u"); 730 TEST_FCMOV(a, b, CC_P, "u"); 731 TEST_FCMOV(a, b, 0, "nu"); 732 TEST_FCMOV(a, b, CC_P, "nu"); 733} 734 735void test_floats(void) 736{ 737 test_fops(2, 3); 738 test_fops(1.4, -5); 739 test_fcmp(2, -1); 740 test_fcmp(2, 2); 741 test_fcmp(2, 3); 742 test_fcvt(0.5); 743 test_fcvt(-0.5); 744 test_fcvt(1.0/7.0); 745 test_fcvt(-1.0/9.0); 746 test_fcvt(32768); 747 test_fcvt(-1e20); 748 test_fconst(); 749 // REINSTATE (maybe): test_fbcd(1234567890123456); 750 // REINSTATE (maybe): test_fbcd(-123451234567890); 751 // REINSTATE: test_fenv(); 752 // REINSTATE: test_fcmov(); 753} 754 755/**********************************************/ 756#if 0 757 758#define TEST_BCD(op, op0, cc_in, cc_mask)\ 759{\ 760 int res, flags;\ 761 res = op0;\ 762 flags = cc_in;\ 763 asm ("push %3\n\t"\ 764 "popf\n\t"\ 765 #op "\n\t"\ 766 "pushf\n\t"\ 767 "popl %1\n\t"\ 768 : "=a" (res), "=g" (flags)\ 769 : "0" (res), "1" (flags));\ 770 printf("%-10s A=%08x R=%08x CCIN=%04x CC=%04x\n",\ 771 #op, op0, res, cc_in, flags & cc_mask);\ 772} 773 774void test_bcd(void) 775{ 776 TEST_BCD(daa, 0x12340503, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 777 TEST_BCD(daa, 0x12340506, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 778 TEST_BCD(daa, 0x12340507, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 779 TEST_BCD(daa, 0x12340559, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 780 TEST_BCD(daa, 0x12340560, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 781 TEST_BCD(daa, 0x1234059f, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 782 TEST_BCD(daa, 0x123405a0, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 783 TEST_BCD(daa, 0x12340503, 0, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 784 TEST_BCD(daa, 0x12340506, 0, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 785 TEST_BCD(daa, 0x12340503, CC_C, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 786 TEST_BCD(daa, 0x12340506, CC_C, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 787 TEST_BCD(daa, 0x12340503, CC_C | CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 788 TEST_BCD(daa, 0x12340506, CC_C | CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 789 790 TEST_BCD(das, 0x12340503, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 791 TEST_BCD(das, 0x12340506, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 792 TEST_BCD(das, 0x12340507, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 793 TEST_BCD(das, 0x12340559, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 794 TEST_BCD(das, 0x12340560, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 795 TEST_BCD(das, 0x1234059f, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 796 TEST_BCD(das, 0x123405a0, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 797 TEST_BCD(das, 0x12340503, 0, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 798 TEST_BCD(das, 0x12340506, 0, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 799 TEST_BCD(das, 0x12340503, CC_C, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 800 TEST_BCD(das, 0x12340506, CC_C, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 801 TEST_BCD(das, 0x12340503, CC_C | CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 802 TEST_BCD(das, 0x12340506, CC_C | CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A)); 803 804 TEST_BCD(aaa, 0x12340205, CC_A, (CC_C | CC_A)); 805 TEST_BCD(aaa, 0x12340306, CC_A, (CC_C | CC_A)); 806 TEST_BCD(aaa, 0x1234040a, CC_A, (CC_C | CC_A)); 807 TEST_BCD(aaa, 0x123405fa, CC_A, (CC_C | CC_A)); 808 TEST_BCD(aaa, 0x12340205, 0, (CC_C | CC_A)); 809 TEST_BCD(aaa, 0x12340306, 0, (CC_C | CC_A)); 810 TEST_BCD(aaa, 0x1234040a, 0, (CC_C | CC_A)); 811 TEST_BCD(aaa, 0x123405fa, 0, (CC_C | CC_A)); 812 813 TEST_BCD(aas, 0x12340205, CC_A, (CC_C | CC_A)); 814 TEST_BCD(aas, 0x12340306, CC_A, (CC_C | CC_A)); 815 TEST_BCD(aas, 0x1234040a, CC_A, (CC_C | CC_A)); 816 TEST_BCD(aas, 0x123405fa, CC_A, (CC_C | CC_A)); 817 TEST_BCD(aas, 0x12340205, 0, (CC_C | CC_A)); 818 TEST_BCD(aas, 0x12340306, 0, (CC_C | CC_A)); 819 TEST_BCD(aas, 0x1234040a, 0, (CC_C | CC_A)); 820 TEST_BCD(aas, 0x123405fa, 0, (CC_C | CC_A)); 821 822 TEST_BCD(aam, 0x12340547, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_O | CC_A)); 823 TEST_BCD(aad, 0x12340407, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_O | CC_A)); 824} 825#endif /* 0 */ 826 827#define TEST_XCHG(op, size, opconst)\ 828{\ 829 int op0, op1;\ 830 op0 = 0x12345678;\ 831 op1 = 0xfbca7654;\ 832 asm(#op " %" size "0, %" size "1" \ 833 : "=q" (op0), opconst (op1) \ 834 : "0" (op0), "1" (op1));\ 835 printf("%-10s A=%08x B=%08x\n",\ 836 #op, op0, op1);\ 837} 838 839#define TEST_CMPXCHG(op, size, opconst, eax)\ 840{\ 841 int op0, op1;\ 842 op0 = 0x12345678;\ 843 op1 = 0xfbca7654;\ 844 asm(#op " %" size "0, %" size "1" \ 845 : "=q" (op0), opconst (op1) \ 846 : "0" (op0), "1" (op1), "a" (eax));\ 847 printf("%-10s EAX=%08x A=%08x C=%08x\n",\ 848 #op, eax, op0, op1);\ 849} 850 851void test_xchg(void) 852{ 853 TEST_XCHG(xchgl, "", "=q"); 854 TEST_XCHG(xchgw, "w", "=q"); 855 TEST_XCHG(xchgb, "b", "=q"); 856 857 TEST_XCHG(xchgl, "", "=m"); 858 TEST_XCHG(xchgw, "w", "=m"); 859 TEST_XCHG(xchgb, "b", "=m"); 860 861#if 0 862 TEST_XCHG(xaddl, "", "=q"); 863 TEST_XCHG(xaddw, "w", "=q"); 864 TEST_XCHG(xaddb, "b", "=q"); 865 866 { 867 int res; 868 res = 0x12345678; 869 asm("xaddl %1, %0" : "=r" (res) : "0" (res)); 870 printf("xaddl same res=%08x\n", res); 871 } 872 873 TEST_XCHG(xaddl, "", "=m"); 874 TEST_XCHG(xaddw, "w", "=m"); 875 TEST_XCHG(xaddb, "b", "=m"); 876#endif 877 TEST_CMPXCHG(cmpxchgl, "", "=q", 0xfbca7654); 878 TEST_CMPXCHG(cmpxchgw, "w", "=q", 0xfbca7654); 879 TEST_CMPXCHG(cmpxchgb, "b", "=q", 0xfbca7654); 880 881 TEST_CMPXCHG(cmpxchgl, "", "=q", 0xfffefdfc); 882 TEST_CMPXCHG(cmpxchgw, "w", "=q", 0xfffefdfc); 883 TEST_CMPXCHG(cmpxchgb, "b", "=q", 0xfffefdfc); 884 885 TEST_CMPXCHG(cmpxchgl, "", "=m", 0xfbca7654); 886 TEST_CMPXCHG(cmpxchgw, "w", "=m", 0xfbca7654); 887 TEST_CMPXCHG(cmpxchgb, "b", "=m", 0xfbca7654); 888 889 TEST_CMPXCHG(cmpxchgl, "", "=m", 0xfffefdfc); 890 TEST_CMPXCHG(cmpxchgw, "w", "=m", 0xfffefdfc); 891 TEST_CMPXCHG(cmpxchgb, "b", "=m", 0xfffefdfc); 892#if 0 893 { 894 uint64_t op0, op1, op2; 895 int i, eflags; 896 897 for(i = 0; i < 2; i++) { 898 op0 = 0x123456789abcd; 899 if (i == 0) 900 op1 = 0xfbca765423456; 901 else 902 op1 = op0; 903 op2 = 0x6532432432434; 904 asm("cmpxchg8b %1\n" 905 "pushf\n" 906 "popl %2\n" 907 : "=A" (op0), "=m" (op1), "=g" (eflags) 908 : "0" (op0), "m" (op1), "b" ((int)op2), "c" ((int)(op2 >> 32))); 909 printf("cmpxchg8b: op0=%016llx op1=%016llx CC=%02x\n", 910 op0, op1, eflags & CC_Z); 911 } 912 } 913#endif 914} 915 916/**********************************************/ 917/* segmentation tests */ 918#if 0 919#include <asm/ldt.h> 920#include <linux/unistd.h> 921#include <linux/version.h> 922 923_syscall3(int, modify_ldt, int, func, void *, ptr, unsigned long, bytecount) 924 925#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 66) 926#define modify_ldt_ldt_s user_desc 927#endif 928 929uint8_t seg_data1[4096]; 930uint8_t seg_data2[4096]; 931 932#define MK_SEL(n) (((n) << 3) | 7) 933 934#define TEST_LR(op, size, seg, mask)\ 935{\ 936 int res, res2;\ 937 res = 0x12345678;\ 938 asm (op " %" size "2, %" size "0\n" \ 939 "movl $0, %1\n"\ 940 "jnz 1f\n"\ 941 "movl $1, %1\n"\ 942 "1:\n"\ 943 : "=r" (res), "=r" (res2) : "m" (seg), "0" (res));\ 944 printf(op ": Z=%d %08x\n", res2, res & ~(mask));\ 945} 946 947/* NOTE: we use Linux modify_ldt syscall */ 948void test_segs(void) 949{ 950 struct modify_ldt_ldt_s ldt; 951 long long ldt_table[3]; 952 int res, res2; 953 char tmp; 954 struct { 955 uint32_t offset; 956 uint16_t seg; 957 } __attribute__((packed)) segoff; 958 959 ldt.entry_number = 1; 960 ldt.base_addr = (unsigned long)&seg_data1; 961 ldt.limit = (sizeof(seg_data1) + 0xfff) >> 12; 962 ldt.seg_32bit = 1; 963 ldt.contents = MODIFY_LDT_CONTENTS_DATA; 964 ldt.read_exec_only = 0; 965 ldt.limit_in_pages = 1; 966 ldt.seg_not_present = 0; 967 ldt.useable = 1; 968 modify_ldt(1, &ldt, sizeof(ldt)); /* write ldt entry */ 969 970 ldt.entry_number = 2; 971 ldt.base_addr = (unsigned long)&seg_data2; 972 ldt.limit = (sizeof(seg_data2) + 0xfff) >> 12; 973 ldt.seg_32bit = 1; 974 ldt.contents = MODIFY_LDT_CONTENTS_DATA; 975 ldt.read_exec_only = 0; 976 ldt.limit_in_pages = 1; 977 ldt.seg_not_present = 0; 978 ldt.useable = 1; 979 modify_ldt(1, &ldt, sizeof(ldt)); /* write ldt entry */ 980 981 modify_ldt(0, &ldt_table, sizeof(ldt_table)); /* read ldt entries */ 982#if 0 983 { 984 int i; 985 for(i=0;i<3;i++) 986 printf("%d: %016Lx\n", i, ldt_table[i]); 987 } 988#endif 989 /* do some tests with fs or gs */ 990 asm volatile ("movl %0, %%fs" : : "r" (MK_SEL(1))); 991 992 seg_data1[1] = 0xaa; 993 seg_data2[1] = 0x55; 994 995 asm volatile ("fs movzbl 0x1, %0" : "=r" (res)); 996 printf("FS[1] = %02x\n", res); 997 998 asm volatile ("pushl %%gs\n" 999 "movl %1, %%gs\n" 1000 "gs movzbl 0x1, %0\n" 1001 "popl %%gs\n" 1002 : "=r" (res) 1003 : "r" (MK_SEL(2))); 1004 printf("GS[1] = %02x\n", res); 1005 1006 /* tests with ds/ss (implicit segment case) */ 1007 tmp = 0xa5; 1008 asm volatile ("pushl %%ebp\n\t" 1009 "pushl %%ds\n\t" 1010 "movl %2, %%ds\n\t" 1011 "movl %3, %%ebp\n\t" 1012 "movzbl 0x1, %0\n\t" 1013 "movzbl (%%ebp), %1\n\t" 1014 "popl %%ds\n\t" 1015 "popl %%ebp\n\t" 1016 : "=r" (res), "=r" (res2) 1017 : "r" (MK_SEL(1)), "r" (&tmp)); 1018 printf("DS[1] = %02x\n", res); 1019 printf("SS[tmp] = %02x\n", res2); 1020 1021 segoff.seg = MK_SEL(2); 1022 segoff.offset = 0xabcdef12; 1023 asm volatile("lfs %2, %0\n\t" 1024 "movl %%fs, %1\n\t" 1025 : "=r" (res), "=g" (res2) 1026 : "m" (segoff)); 1027 printf("FS:reg = %04x:%08x\n", res2, res); 1028 1029 TEST_LR("larw", "w", MK_SEL(2), 0x0100); 1030 TEST_LR("larl", "", MK_SEL(2), 0x0100); 1031 TEST_LR("lslw", "w", MK_SEL(2), 0); 1032 TEST_LR("lsll", "", MK_SEL(2), 0); 1033 1034 TEST_LR("larw", "w", 0xfff8, 0); 1035 TEST_LR("larl", "", 0xfff8, 0); 1036 TEST_LR("lslw", "w", 0xfff8, 0); 1037 TEST_LR("lsll", "", 0xfff8, 0); 1038} 1039#endif 1040 1041#if 0 1042/* 16 bit code test */ 1043extern char code16_start, code16_end; 1044extern char code16_func1; 1045extern char code16_func2; 1046extern char code16_func3; 1047 1048void test_code16(void) 1049{ 1050 struct modify_ldt_ldt_s ldt; 1051 int res, res2; 1052 1053 /* build a code segment */ 1054 ldt.entry_number = 1; 1055 ldt.base_addr = (unsigned long)&code16_start; 1056 ldt.limit = &code16_end - &code16_start; 1057 ldt.seg_32bit = 0; 1058 ldt.contents = MODIFY_LDT_CONTENTS_CODE; 1059 ldt.read_exec_only = 0; 1060 ldt.limit_in_pages = 0; 1061 ldt.seg_not_present = 0; 1062 ldt.useable = 1; 1063 modify_ldt(1, &ldt, sizeof(ldt)); /* write ldt entry */ 1064 1065 /* call the first function */ 1066 asm volatile ("lcall %1, %2" 1067 : "=a" (res) 1068 : "i" (MK_SEL(1)), "i" (&code16_func1): "memory", "cc"); 1069 printf("func1() = 0x%08x\n", res); 1070 asm volatile ("lcall %2, %3" 1071 : "=a" (res), "=c" (res2) 1072 : "i" (MK_SEL(1)), "i" (&code16_func2): "memory", "cc"); 1073 printf("func2() = 0x%08x spdec=%d\n", res, res2); 1074 asm volatile ("lcall %1, %2" 1075 : "=a" (res) 1076 : "i" (MK_SEL(1)), "i" (&code16_func3): "memory", "cc"); 1077 printf("func3() = 0x%08x\n", res); 1078} 1079#endif 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#if 0 1090 // REINSTATE 1091 for(i=0;i<256;i++) table[i] = 256 - i; 1092 res = 0x12345678; 1093 asm ("xlat" : "=a" (res) : "b" (table), "0" (res)); 1094 printf("xlat: EAX=%08x\n", res); 1095#endif 1096#if 0 1097 // REINSTATE 1098 asm volatile ("pushl %%cs ; call %1" 1099 : "=a" (res) 1100 : "m" (func_lret32): "memory", "cc"); 1101 printf("func_lret32=%x\n", res); 1102 1103 asm volatile ("pushfl ; pushl %%cs ; call %1" 1104 : "=a" (res) 1105 : "m" (func_iret32): "memory", "cc"); 1106 printf("func_iret32=%x\n", res); 1107#endif 1108 /* specific popl test */ 1109 asm volatile ("pushl $12345432 ; pushl $0x9abcdef ; popl (%%esp) ; popl %0" 1110 : "=g" (res)); 1111 printf("popl esp=%x\n", res); 1112#if 0 1113 // REINSTATE 1114 /* specific popw test */ 1115 asm volatile ("pushl $12345432 ; pushl $0x9abcdef ; popw (%%esp) ; addl $2, %%esp ; popl %0" 1116 : "=g" (res)); 1117 printf("popw esp=%x\n", res); 1118#endif 1119} 1120 1121uint8_t str_buffer[4096]; 1122 1123#define TEST_STRING1(OP, size, DF, REP)\ 1124{\ 1125 int esi, edi, eax, ecx, eflags;\ 1126\ 1127 esi = (long)(str_buffer + sizeof(str_buffer) / 2);\ 1128 edi = (long)(str_buffer + sizeof(str_buffer) / 2) + 16;\ 1129 eax = 0x12345678;\ 1130 ecx = 17;\ 1131\ 1132 asm volatile ("pushl $0\n\t"\ 1133 "popf\n\t"\ 1134 DF "\n\t"\ 1135 REP #OP size "\n\t"\ 1136 "cld\n\t"\ 1137 "pushf\n\t"\ 1138 "popl %4\n\t"\ 1139 : "=S" (esi), "=D" (edi), "=a" (eax), "=c" (ecx), "=g" (eflags)\ 1140 : "0" (esi), "1" (edi), "2" (eax), "3" (ecx));\ 1141 printf("%-10s ESI=%08x EDI=%08x EAX=%08x ECX=%08x EFL=%04x\n",\ 1142 REP #OP size, esi, edi, eax, ecx,\ 1143 eflags & (CC_C | CC_P | CC_Z | CC_S | CC_O | CC_A));\ 1144} 1145 1146#define TEST_STRING(OP, REP)\ 1147 TEST_STRING1(OP, "b", "", REP);\ 1148 TEST_STRING1(OP, "w", "", REP);\ 1149 TEST_STRING1(OP, "l", "", REP);\ 1150 TEST_STRING1(OP, "b", "std", REP);\ 1151 TEST_STRING1(OP, "w", "std", REP);\ 1152 TEST_STRING1(OP, "l", "std", REP) 1153 1154void test_string(void) 1155{ 1156 int i; 1157 for(i = 0;i < sizeof(str_buffer); i++) 1158 str_buffer[i] = i + 0x56; 1159 TEST_STRING(stos, ""); 1160 TEST_STRING(stos, "rep "); 1161 // REINSTATE: TEST_STRING(lods, ""); /* to verify stos */ 1162 // REINSTATE: TEST_STRING(lods, "rep "); 1163 TEST_STRING(movs, ""); 1164 TEST_STRING(movs, "rep "); 1165 // REINSTATE: TEST_STRING(lods, ""); /* to verify stos */ 1166 1167 /* XXX: better tests */ 1168 TEST_STRING(scas, ""); 1169 // REINSTATE: TEST_STRING(scas, "repz "); 1170 TEST_STRING(scas, "repnz "); 1171 // REINSTATE: TEST_STRING(cmps, ""); 1172 TEST_STRING(cmps, "repz "); 1173 // REINSTATE: TEST_STRING(cmps, "repnz "); 1174} 1175 1176/* VM86 test */ 1177#if 0 1178static inline void set_bit(uint8_t *a, unsigned int bit) 1179{ 1180 a[bit / 8] |= (1 << (bit % 8)); 1181} 1182 1183static inline uint8_t *seg_to_linear(unsigned int seg, unsigned int reg) 1184{ 1185 return (uint8_t *)((seg << 4) + (reg & 0xffff)); 1186} 1187 1188static inline void pushw(struct vm86_regs *r, int val) 1189{ 1190 r->esp = (r->esp & ~0xffff) | ((r->esp - 2) & 0xffff); 1191 *(uint16_t *)seg_to_linear(r->ss, r->esp) = val; 1192} 1193 1194#undef __syscall_return 1195#define __syscall_return(type, res) \ 1196do { \ 1197 return (type) (res); \ 1198} while (0) 1199 1200_syscall2(int, vm86, int, func, struct vm86plus_struct *, v86) 1201 1202extern char vm86_code_start; 1203extern char vm86_code_end; 1204 1205#define VM86_CODE_CS 0x100 1206#define VM86_CODE_IP 0x100 1207 1208void test_vm86(void) 1209{ 1210 struct vm86plus_struct ctx; 1211 struct vm86_regs *r; 1212 uint8_t *vm86_mem; 1213 int seg, ret; 1214 1215 vm86_mem = mmap((void *)0x00000000, 0x110000, 1216 PROT_WRITE | PROT_READ | PROT_EXEC, 1217 MAP_FIXED | MAP_ANON | MAP_PRIVATE, -1, 0); 1218 if (vm86_mem == MAP_FAILED) { 1219 printf("ERROR: could not map vm86 memory"); 1220 return; 1221 } 1222 memset(&ctx, 0, sizeof(ctx)); 1223 1224 /* init basic registers */ 1225 r = &ctx.regs; 1226 r->eip = VM86_CODE_IP; 1227 r->esp = 0xfffe; 1228 seg = VM86_CODE_CS; 1229 r->cs = seg; 1230 r->ss = seg; 1231 r->ds = seg; 1232 r->es = seg; 1233 r->fs = seg; 1234 r->gs = seg; 1235 r->eflags = VIF_MASK; 1236 1237 /* move code to proper address. We use the same layout as a .com 1238 dos program. */ 1239 memcpy(vm86_mem + (VM86_CODE_CS << 4) + VM86_CODE_IP, 1240 &vm86_code_start, &vm86_code_end - &vm86_code_start); 1241 1242 /* mark int 0x21 as being emulated */ 1243 set_bit((uint8_t *)&ctx.int_revectored, 0x21); 1244 1245 for(;;) { 1246 ret = vm86(VM86_ENTER, &ctx); 1247 switch(VM86_TYPE(ret)) { 1248 case VM86_INTx: 1249 { 1250 int int_num, ah, v; 1251 1252 int_num = VM86_ARG(ret); 1253 if (int_num != 0x21) 1254 goto unknown_int; 1255 ah = (r->eax >> 8) & 0xff; 1256 switch(ah) { 1257 case 0x00: /* exit */ 1258 goto the_end; 1259 case 0x02: /* write char */ 1260 { 1261 uint8_t c = r->edx; 1262 putchar(c); 1263 } 1264 break; 1265 case 0x09: /* write string */ 1266 { 1267 uint8_t c, *ptr; 1268 ptr = seg_to_linear(r->ds, r->edx); 1269 for(;;) { 1270 c = *ptr++; 1271 if (c == '$') 1272 break; 1273 putchar(c); 1274 } 1275 r->eax = (r->eax & ~0xff) | '$'; 1276 } 1277 break; 1278 case 0xff: /* extension: write eflags number in edx */ 1279 v = (int)r->edx; 1280#ifndef LINUX_VM86_IOPL_FIX 1281 v &= ~0x3000; 1282#endif 1283 printf("%08x\n", v); 1284 break; 1285 default: 1286 unknown_int: 1287 printf("unsupported int 0x%02x\n", int_num); 1288 goto the_end; 1289 } 1290 } 1291 break; 1292 case VM86_SIGNAL: 1293 /* a signal came, we just ignore that */ 1294 break; 1295 case VM86_STI: 1296 break; 1297 default: 1298 printf("ERROR: unhandled vm86 return code (0x%x)\n", ret); 1299 goto the_end; 1300 } 1301 } 1302 the_end: 1303 printf("VM86 end\n"); 1304 munmap(vm86_mem, 0x110000); 1305} 1306#endif 1307 1308/* exception tests */ 1309#if 0 1310#ifndef REG_EAX 1311#define REG_EAX EAX 1312#define REG_EBX EBX 1313#define REG_ECX ECX 1314#define REG_EDX EDX 1315#define REG_ESI ESI 1316#define REG_EDI EDI 1317#define REG_EBP EBP 1318#define REG_ESP ESP 1319#define REG_EIP EIP 1320#define REG_EFL EFL 1321#define REG_TRAPNO TRAPNO 1322#define REG_ERR ERR 1323#endif 1324 1325jmp_buf jmp_env; 1326int v1; 1327int tab[2]; 1328 1329void sig_handler(int sig, siginfo_t *info, void *puc) 1330{ 1331 struct ucontext *uc = puc; 1332 1333 printf("si_signo=%d si_errno=%d si_code=%d", 1334 info->si_signo, info->si_errno, info->si_code); 1335 printf(" si_addr=0x%08lx", 1336 (unsigned long)info->si_addr); 1337 printf("\n"); 1338 1339 printf("trapno=0x%02x err=0x%08x", 1340 uc->uc_mcontext.gregs[REG_TRAPNO], 1341 uc->uc_mcontext.gregs[REG_ERR]); 1342 printf(" EIP=0x%08x", uc->uc_mcontext.gregs[REG_EIP]); 1343 printf("\n"); 1344 longjmp(jmp_env, 1); 1345} 1346 1347void test_exceptions(void) 1348{ 1349 struct modify_ldt_ldt_s ldt; 1350 struct sigaction act; 1351 volatile int val; 1352 1353 act.sa_sigaction = sig_handler; 1354 sigemptyset(&act.sa_mask); 1355 act.sa_flags = SA_SIGINFO; 1356 sigaction(SIGFPE, &act, NULL); 1357 sigaction(SIGILL, &act, NULL); 1358 sigaction(SIGSEGV, &act, NULL); 1359 sigaction(SIGBUS, &act, NULL); 1360 sigaction(SIGTRAP, &act, NULL); 1361 1362 /* test division by zero reporting */ 1363 printf("DIVZ exception:\n"); 1364 if (setjmp(jmp_env) == 0) { 1365 /* now divide by zero */ 1366 v1 = 0; 1367 v1 = 2 / v1; 1368 } 1369 1370 printf("BOUND exception:\n"); 1371 if (setjmp(jmp_env) == 0) { 1372 /* bound exception */ 1373 tab[0] = 1; 1374 tab[1] = 10; 1375 asm volatile ("bound %0, %1" : : "r" (11), "m" (tab)); 1376 } 1377 1378 printf("segment exceptions:\n"); 1379 if (setjmp(jmp_env) == 0) { 1380 /* load an invalid segment */ 1381 asm volatile ("movl %0, %%fs" : : "r" ((0x1234 << 3) | 1)); 1382 } 1383 if (setjmp(jmp_env) == 0) { 1384 /* null data segment is valid */ 1385 asm volatile ("movl %0, %%fs" : : "r" (3)); 1386 /* null stack segment */ 1387 asm volatile ("movl %0, %%ss" : : "r" (3)); 1388 } 1389 1390 ldt.entry_number = 1; 1391 ldt.base_addr = (unsigned long)&seg_data1; 1392 ldt.limit = (sizeof(seg_data1) + 0xfff) >> 12; 1393 ldt.seg_32bit = 1; 1394 ldt.contents = MODIFY_LDT_CONTENTS_DATA; 1395 ldt.read_exec_only = 0; 1396 ldt.limit_in_pages = 1; 1397 ldt.seg_not_present = 1; 1398 ldt.useable = 1; 1399 modify_ldt(1, &ldt, sizeof(ldt)); /* write ldt entry */ 1400 1401 if (setjmp(jmp_env) == 0) { 1402 /* segment not present */ 1403 asm volatile ("movl %0, %%fs" : : "r" (MK_SEL(1))); 1404 } 1405 1406 /* test SEGV reporting */ 1407 printf("PF exception:\n"); 1408 if (setjmp(jmp_env) == 0) { 1409 val = 1; 1410 /* we add a nop to test a weird PC retrieval case */ 1411 asm volatile ("nop"); 1412 /* now store in an invalid address */ 1413 *(char *)0x1234 = 1; 1414 } 1415 1416 /* test SEGV reporting */ 1417 printf("PF exception:\n"); 1418 if (setjmp(jmp_env) == 0) { 1419 val = 1; 1420 /* read from an invalid address */ 1421 v1 = *(char *)0x1234; 1422 } 1423 1424 /* test illegal instruction reporting */ 1425 printf("UD2 exception:\n"); 1426 if (setjmp(jmp_env) == 0) { 1427 /* now execute an invalid instruction */ 1428 asm volatile("ud2"); 1429 } 1430 printf("lock nop exception:\n"); 1431 if (setjmp(jmp_env) == 0) { 1432 /* now execute an invalid instruction */ 1433 asm volatile("lock nop"); 1434 } 1435 1436 printf("INT exception:\n"); 1437 if (setjmp(jmp_env) == 0) { 1438 asm volatile ("int $0xfd"); 1439 } 1440 if (setjmp(jmp_env) == 0) { 1441 asm volatile ("int $0x01"); 1442 } 1443 if (setjmp(jmp_env) == 0) { 1444 asm volatile (".byte 0xcd, 0x03"); 1445 } 1446 if (setjmp(jmp_env) == 0) { 1447 asm volatile ("int $0x04"); 1448 } 1449 if (setjmp(jmp_env) == 0) { 1450 asm volatile ("int $0x05"); 1451 } 1452 1453 printf("INT3 exception:\n"); 1454 if (setjmp(jmp_env) == 0) { 1455 asm volatile ("int3"); 1456 } 1457 1458 printf("CLI exception:\n"); 1459 if (setjmp(jmp_env) == 0) { 1460 asm volatile ("cli"); 1461 } 1462 1463 printf("STI exception:\n"); 1464 if (setjmp(jmp_env) == 0) { 1465 asm volatile ("cli"); 1466 } 1467 1468 printf("INTO exception:\n"); 1469 if (setjmp(jmp_env) == 0) { 1470 /* overflow exception */ 1471 asm volatile ("addl $1, %0 ; into" : : "r" (0x7fffffff)); 1472 } 1473 1474 printf("OUTB exception:\n"); 1475 if (setjmp(jmp_env) == 0) { 1476 asm volatile ("outb %%al, %%dx" : : "d" (0x4321), "a" (0)); 1477 } 1478 1479 printf("INB exception:\n"); 1480 if (setjmp(jmp_env) == 0) { 1481 asm volatile ("inb %%dx, %%al" : "=a" (val) : "d" (0x4321)); 1482 } 1483 1484 printf("REP OUTSB exception:\n"); 1485 if (setjmp(jmp_env) == 0) { 1486 asm volatile ("rep outsb" : : "d" (0x4321), "S" (tab), "c" (1)); 1487 } 1488 1489 printf("REP INSB exception:\n"); 1490 if (setjmp(jmp_env) == 0) { 1491 asm volatile ("rep insb" : : "d" (0x4321), "D" (tab), "c" (1)); 1492 } 1493 1494 printf("HLT exception:\n"); 1495 if (setjmp(jmp_env) == 0) { 1496 asm volatile ("hlt"); 1497 } 1498 1499 printf("single step exception:\n"); 1500 val = 0; 1501 if (setjmp(jmp_env) == 0) { 1502 asm volatile ("pushf\n" 1503 "orl $0x00100, (%%esp)\n" 1504 "popf\n" 1505 "movl $0xabcd, %0\n" 1506 "movl $0x0, %0\n" : "=m" (val) : : "cc", "memory"); 1507 } 1508 printf("val=0x%x\n", val); 1509} 1510 1511/* specific precise single step test */ 1512void sig_trap_handler(int sig, siginfo_t *info, void *puc) 1513{ 1514 struct ucontext *uc = puc; 1515 printf("EIP=0x%08x\n", uc->uc_mcontext.gregs[REG_EIP]); 1516} 1517 1518const uint8_t sstep_buf1[4] = { 1, 2, 3, 4}; 1519uint8_t sstep_buf2[4]; 1520 1521void test_single_step(void) 1522{ 1523 struct sigaction act; 1524 volatile int val; 1525 int i; 1526 1527 val = 0; 1528 act.sa_sigaction = sig_trap_handler; 1529 sigemptyset(&act.sa_mask); 1530 act.sa_flags = SA_SIGINFO; 1531 sigaction(SIGTRAP, &act, NULL); 1532 asm volatile ("pushf\n" 1533 "orl $0x00100, (%%esp)\n" 1534 "popf\n" 1535 "movl $0xabcd, %0\n" 1536 1537 /* jmp test */ 1538 "movl $3, %%ecx\n" 1539 "1:\n" 1540 "addl $1, %0\n" 1541 "decl %%ecx\n" 1542 "jnz 1b\n" 1543 1544 /* movsb: the single step should stop at each movsb iteration */ 1545 "movl $sstep_buf1, %%esi\n" 1546 "movl $sstep_buf2, %%edi\n" 1547 "movl $0, %%ecx\n" 1548 "rep movsb\n" 1549 "movl $3, %%ecx\n" 1550 "rep movsb\n" 1551 "movl $1, %%ecx\n" 1552 "rep movsb\n" 1553 1554 /* cmpsb: the single step should stop at each cmpsb iteration */ 1555 "movl $sstep_buf1, %%esi\n" 1556 "movl $sstep_buf2, %%edi\n" 1557 "movl $0, %%ecx\n" 1558 "rep cmpsb\n" 1559 "movl $4, %%ecx\n" 1560 "rep cmpsb\n" 1561 1562 /* getpid() syscall: single step should skip one 1563 instruction */ 1564 "movl $20, %%eax\n" 1565 "int $0x80\n" 1566 "movl $0, %%eax\n" 1567 1568 /* when modifying SS, trace is not done on the next 1569 instruction */ 1570 "movl %%ss, %%ecx\n" 1571 "movl %%ecx, %%ss\n" 1572 "addl $1, %0\n" 1573 "movl $1, %%eax\n" 1574 "movl %%ecx, %%ss\n" 1575 "jmp 1f\n" 1576 "addl $1, %0\n" 1577 "1:\n" 1578 "movl $1, %%eax\n" 1579 "pushl %%ecx\n" 1580 "popl %%ss\n" 1581 "addl $1, %0\n" 1582 "movl $1, %%eax\n" 1583 1584 "pushf\n" 1585 "andl $~0x00100, (%%esp)\n" 1586 "popf\n" 1587 : "=m" (val) 1588 : 1589 : "cc", "memory", "eax", "ecx", "esi", "edi"); 1590 printf("val=%d\n", val); 1591 for(i = 0; i < 4; i++) 1592 printf("sstep_buf2[%d] = %d\n", i, sstep_buf2[i]); 1593} 1594 1595/* self modifying code test */ 1596uint8_t code[] = { 1597 0xb8, 0x1, 0x00, 0x00, 0x00, /* movl $1, %eax */ 1598 0xc3, /* ret */ 1599}; 1600 1601asm("smc_code2:\n" 1602 "movl 4(%esp), %eax\n" 1603 "movl %eax, smc_patch_addr2 + 1\n" 1604 "nop\n" 1605 "nop\n" 1606 "nop\n" 1607 "nop\n" 1608 "nop\n" 1609 "nop\n" 1610 "nop\n" 1611 "nop\n" 1612 "smc_patch_addr2:\n" 1613 "movl $1, %eax\n" 1614 "ret\n"); 1615 1616typedef int FuncType(void); 1617extern int smc_code2(int); 1618void test_self_modifying_code(void) 1619{ 1620 int i; 1621 1622 printf("self modifying code:\n"); 1623 printf("func1 = 0x%x\n", ((FuncType *)code)()); 1624 for(i = 2; i <= 4; i++) { 1625 code[1] = i; 1626 printf("func%d = 0x%x\n", i, ((FuncType *)code)()); 1627 } 1628 1629 /* more difficult test : the modified code is just after the 1630 modifying instruction. It is forbidden in Intel specs, but it 1631 is used by old DOS programs */ 1632 for(i = 2; i <= 4; i++) { 1633 printf("smc_code2(%d) = %d\n", i, smc_code2(i)); 1634 } 1635} 1636 1637static void *call_end __init_call = NULL; 1638#endif 1639 1640int main(int argc, char **argv) 1641{ 1642 void **ptr; 1643 void (*func)(void); 1644 1645#if 1 1646 ptr = &call_start + 1; 1647 while (*ptr != NULL) { 1648 func = *ptr++; 1649 func(); 1650 } 1651#endif 1652 test_bsx(); 1653 test_mul(); 1654 test_jcc(); 1655 test_floats(); 1656 //test_bcd(); 1657 test_xchg(); 1658 test_string(); 1659 test_misc(); // REINSTATE 1660 test_lea(); 1661 // test_segs(); 1662 //test_code16(); 1663 //test_vm86(); 1664 //test_exceptions(); 1665 //test_self_modifying_code(); 1666 //test_single_step(); 1667 return 0; 1668} 1669