1 /* SPDX-License-Identifier: GPL-2.0 */ 2 3 #define _GNU_SOURCE 4 5 /* libc-specific include files 6 * The program may be built in 3 ways: 7 * $(CC) -nostdlib -include /path/to/nolibc.h => NOLIBC already defined 8 * $(CC) -nostdlib -I/path/to/nolibc/sysroot => _NOLIBC_* guards are present 9 * $(CC) with default libc => NOLIBC* never defined 10 */ 11 #ifndef NOLIBC 12 #include <stdio.h> 13 #include <stdlib.h> 14 #include <string.h> 15 #ifndef _NOLIBC_STDIO_H 16 /* standard libcs need more includes */ 17 #include <linux/reboot.h> 18 #include <sys/io.h> 19 #include <sys/ioctl.h> 20 #include <sys/mman.h> 21 #include <sys/mount.h> 22 #include <sys/prctl.h> 23 #include <sys/reboot.h> 24 #include <sys/stat.h> 25 #include <sys/syscall.h> 26 #include <sys/sysmacros.h> 27 #include <sys/time.h> 28 #include <sys/wait.h> 29 #include <dirent.h> 30 #include <errno.h> 31 #include <fcntl.h> 32 #include <poll.h> 33 #include <sched.h> 34 #include <signal.h> 35 #include <stdarg.h> 36 #include <stddef.h> 37 #include <stdint.h> 38 #include <unistd.h> 39 #include <limits.h> 40 #endif 41 #endif 42 43 /* will be used by nolibc by getenv() */ 44 char **environ; 45 46 /* definition of a series of tests */ 47 struct test { 48 const char *name; /* test name */ 49 int (*func)(int min, int max); /* handler */ 50 }; 51 52 #ifndef _NOLIBC_STDLIB_H 53 char *itoa(int i) 54 { 55 static char buf[12]; 56 int ret; 57 58 ret = snprintf(buf, sizeof(buf), "%d", i); 59 return (ret >= 0 && ret < sizeof(buf)) ? buf : "#err"; 60 } 61 #endif 62 63 #define CASE_ERR(err) \ 64 case err: return #err 65 66 /* returns the error name (e.g. "ENOENT") for common errors, "SUCCESS" for 0, 67 * or the decimal value for less common ones. 68 */ 69 const char *errorname(int err) 70 { 71 switch (err) { 72 case 0: return "SUCCESS"; 73 CASE_ERR(EPERM); 74 CASE_ERR(ENOENT); 75 CASE_ERR(ESRCH); 76 CASE_ERR(EINTR); 77 CASE_ERR(EIO); 78 CASE_ERR(ENXIO); 79 CASE_ERR(E2BIG); 80 CASE_ERR(ENOEXEC); 81 CASE_ERR(EBADF); 82 CASE_ERR(ECHILD); 83 CASE_ERR(EAGAIN); 84 CASE_ERR(ENOMEM); 85 CASE_ERR(EACCES); 86 CASE_ERR(EFAULT); 87 CASE_ERR(ENOTBLK); 88 CASE_ERR(EBUSY); 89 CASE_ERR(EEXIST); 90 CASE_ERR(EXDEV); 91 CASE_ERR(ENODEV); 92 CASE_ERR(ENOTDIR); 93 CASE_ERR(EISDIR); 94 CASE_ERR(EINVAL); 95 CASE_ERR(ENFILE); 96 CASE_ERR(EMFILE); 97 CASE_ERR(ENOTTY); 98 CASE_ERR(ETXTBSY); 99 CASE_ERR(EFBIG); 100 CASE_ERR(ENOSPC); 101 CASE_ERR(ESPIPE); 102 CASE_ERR(EROFS); 103 CASE_ERR(EMLINK); 104 CASE_ERR(EPIPE); 105 CASE_ERR(EDOM); 106 CASE_ERR(ERANGE); 107 CASE_ERR(ENOSYS); 108 CASE_ERR(EOVERFLOW); 109 default: 110 return itoa(err); 111 } 112 } 113 114 static void putcharn(char c, size_t n) 115 { 116 char buf[64]; 117 118 memset(buf, c, n); 119 buf[n] = '\0'; 120 fputs(buf, stdout); 121 } 122 123 static int pad_spc(int llen, int cnt, const char *fmt, ...) 124 { 125 va_list args; 126 int ret; 127 128 putcharn(' ', cnt - llen); 129 130 va_start(args, fmt); 131 ret = vfprintf(stdout, fmt, args); 132 va_end(args); 133 return ret < 0 ? ret : ret + cnt - llen; 134 } 135 136 /* The tests below are intended to be used by the macroes, which evaluate 137 * expression <expr>, print the status to stdout, and update the "ret" 138 * variable to count failures. The functions themselves return the number 139 * of failures, thus either 0 or 1. 140 */ 141 142 #define EXPECT_ZR(cond, expr) \ 143 do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_zr(expr, llen); } while (0) 144 145 static int expect_zr(int expr, int llen) 146 { 147 int ret = !(expr == 0); 148 149 llen += printf(" = %d ", expr); 150 pad_spc(llen, 64, ret ? "[FAIL]\n" : " [OK]\n"); 151 return ret; 152 } 153 154 155 #define EXPECT_NZ(cond, expr, val) \ 156 do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_nz(expr, llen; } while (0) 157 158 static int expect_nz(int expr, int llen) 159 { 160 int ret = !(expr != 0); 161 162 llen += printf(" = %d ", expr); 163 pad_spc(llen, 64, ret ? "[FAIL]\n" : " [OK]\n"); 164 return ret; 165 } 166 167 168 #define EXPECT_EQ(cond, expr, val) \ 169 do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_eq(expr, llen, val); } while (0) 170 171 static int expect_eq(uint64_t expr, int llen, uint64_t val) 172 { 173 int ret = !(expr == val); 174 175 llen += printf(" = %lld ", (long long)expr); 176 pad_spc(llen, 64, ret ? "[FAIL]\n" : " [OK]\n"); 177 return ret; 178 } 179 180 181 #define EXPECT_NE(cond, expr, val) \ 182 do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_ne(expr, llen, val); } while (0) 183 184 static int expect_ne(int expr, int llen, int val) 185 { 186 int ret = !(expr != val); 187 188 llen += printf(" = %d ", expr); 189 pad_spc(llen, 64, ret ? "[FAIL]\n" : " [OK]\n"); 190 return ret; 191 } 192 193 194 #define EXPECT_GE(cond, expr, val) \ 195 do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_ge(expr, llen, val); } while (0) 196 197 static int expect_ge(int expr, int llen, int val) 198 { 199 int ret = !(expr >= val); 200 201 llen += printf(" = %d ", expr); 202 pad_spc(llen, 64, ret ? "[FAIL]\n" : " [OK]\n"); 203 return ret; 204 } 205 206 207 #define EXPECT_GT(cond, expr, val) \ 208 do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_gt(expr, llen, val); } while (0) 209 210 static int expect_gt(int expr, int llen, int val) 211 { 212 int ret = !(expr > val); 213 214 llen += printf(" = %d ", expr); 215 pad_spc(llen, 64, ret ? "[FAIL]\n" : " [OK]\n"); 216 return ret; 217 } 218 219 220 #define EXPECT_LE(cond, expr, val) \ 221 do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_le(expr, llen, val); } while (0) 222 223 static int expect_le(int expr, int llen, int val) 224 { 225 int ret = !(expr <= val); 226 227 llen += printf(" = %d ", expr); 228 pad_spc(llen, 64, ret ? "[FAIL]\n" : " [OK]\n"); 229 return ret; 230 } 231 232 233 #define EXPECT_LT(cond, expr, val) \ 234 do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_lt(expr, llen, val); } while (0) 235 236 static int expect_lt(int expr, int llen, int val) 237 { 238 int ret = !(expr < val); 239 240 llen += printf(" = %d ", expr); 241 pad_spc(llen, 64, ret ? "[FAIL]\n" : " [OK]\n"); 242 return ret; 243 } 244 245 246 #define EXPECT_SYSZR(cond, expr) \ 247 do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_syszr(expr, llen); } while (0) 248 249 static int expect_syszr(int expr, int llen) 250 { 251 int ret = 0; 252 253 if (expr) { 254 ret = 1; 255 llen += printf(" = %d %s ", expr, errorname(errno)); 256 llen += pad_spc(llen, 64, "[FAIL]\n"); 257 } else { 258 llen += printf(" = %d ", expr); 259 llen += pad_spc(llen, 64, " [OK]\n"); 260 } 261 return ret; 262 } 263 264 265 #define EXPECT_SYSEQ(cond, expr, val) \ 266 do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_syseq(expr, llen, val); } while (0) 267 268 static int expect_syseq(int expr, int llen, int val) 269 { 270 int ret = 0; 271 272 if (expr != val) { 273 ret = 1; 274 llen += printf(" = %d %s ", expr, errorname(errno)); 275 llen += pad_spc(llen, 64, "[FAIL]\n"); 276 } else { 277 llen += printf(" = %d ", expr); 278 llen += pad_spc(llen, 64, " [OK]\n"); 279 } 280 return ret; 281 } 282 283 284 #define EXPECT_SYSNE(cond, expr, val) \ 285 do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_sysne(expr, llen, val); } while (0) 286 287 static int expect_sysne(int expr, int llen, int val) 288 { 289 int ret = 0; 290 291 if (expr == val) { 292 ret = 1; 293 llen += printf(" = %d %s ", expr, errorname(errno)); 294 llen += pad_spc(llen, 64, "[FAIL]\n"); 295 } else { 296 llen += printf(" = %d ", expr); 297 llen += pad_spc(llen, 64, " [OK]\n"); 298 } 299 return ret; 300 } 301 302 303 #define EXPECT_SYSER2(cond, expr, expret, experr1, experr2) \ 304 do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_syserr2(expr, expret, experr1, experr2, llen); } while (0) 305 306 #define EXPECT_SYSER(cond, expr, expret, experr) \ 307 EXPECT_SYSER2(cond, expr, expret, experr, 0) 308 309 static int expect_syserr2(int expr, int expret, int experr1, int experr2, int llen) 310 { 311 int ret = 0; 312 int _errno = errno; 313 314 llen += printf(" = %d %s ", expr, errorname(_errno)); 315 if (expr != expret || (_errno != experr1 && _errno != experr2)) { 316 ret = 1; 317 if (experr2 == 0) 318 llen += printf(" != (%d %s) ", expret, errorname(experr1)); 319 else 320 llen += printf(" != (%d %s %s) ", expret, errorname(experr1), errorname(experr2)); 321 llen += pad_spc(llen, 64, "[FAIL]\n"); 322 } else { 323 llen += pad_spc(llen, 64, " [OK]\n"); 324 } 325 return ret; 326 } 327 328 329 #define EXPECT_PTRZR(cond, expr) \ 330 do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_ptrzr(expr, llen); } while (0) 331 332 static int expect_ptrzr(const void *expr, int llen) 333 { 334 int ret = 0; 335 336 llen += printf(" = <%p> ", expr); 337 if (expr) { 338 ret = 1; 339 llen += pad_spc(llen, 64, "[FAIL]\n"); 340 } else { 341 llen += pad_spc(llen, 64, " [OK]\n"); 342 } 343 return ret; 344 } 345 346 347 #define EXPECT_PTRNZ(cond, expr) \ 348 do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_ptrnz(expr, llen); } while (0) 349 350 static int expect_ptrnz(const void *expr, int llen) 351 { 352 int ret = 0; 353 354 llen += printf(" = <%p> ", expr); 355 if (!expr) { 356 ret = 1; 357 llen += pad_spc(llen, 64, "[FAIL]\n"); 358 } else { 359 llen += pad_spc(llen, 64, " [OK]\n"); 360 } 361 return ret; 362 } 363 364 365 #define EXPECT_STRZR(cond, expr) \ 366 do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_strzr(expr, llen); } while (0) 367 368 static int expect_strzr(const char *expr, int llen) 369 { 370 int ret = 0; 371 372 llen += printf(" = <%s> ", expr); 373 if (expr) { 374 ret = 1; 375 llen += pad_spc(llen, 64, "[FAIL]\n"); 376 } else { 377 llen += pad_spc(llen, 64, " [OK]\n"); 378 } 379 return ret; 380 } 381 382 383 #define EXPECT_STRNZ(cond, expr) \ 384 do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_strnz(expr, llen); } while (0) 385 386 static int expect_strnz(const char *expr, int llen) 387 { 388 int ret = 0; 389 390 llen += printf(" = <%s> ", expr); 391 if (!expr) { 392 ret = 1; 393 llen += pad_spc(llen, 64, "[FAIL]\n"); 394 } else { 395 llen += pad_spc(llen, 64, " [OK]\n"); 396 } 397 return ret; 398 } 399 400 401 #define EXPECT_STREQ(cond, expr, cmp) \ 402 do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_streq(expr, llen, cmp); } while (0) 403 404 static int expect_streq(const char *expr, int llen, const char *cmp) 405 { 406 int ret = 0; 407 408 llen += printf(" = <%s> ", expr); 409 if (strcmp(expr, cmp) != 0) { 410 ret = 1; 411 llen += pad_spc(llen, 64, "[FAIL]\n"); 412 } else { 413 llen += pad_spc(llen, 64, " [OK]\n"); 414 } 415 return ret; 416 } 417 418 419 #define EXPECT_STRNE(cond, expr, cmp) \ 420 do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_strne(expr, llen, cmp); } while (0) 421 422 static int expect_strne(const char *expr, int llen, const char *cmp) 423 { 424 int ret = 0; 425 426 llen += printf(" = <%s> ", expr); 427 if (strcmp(expr, cmp) == 0) { 428 ret = 1; 429 llen += pad_spc(llen, 64, "[FAIL]\n"); 430 } else { 431 llen += pad_spc(llen, 64, " [OK]\n"); 432 } 433 return ret; 434 } 435 436 437 /* declare tests based on line numbers. There must be exactly one test per line. */ 438 #define CASE_TEST(name) \ 439 case __LINE__: llen += printf("%d %s", test, #name); 440 441 442 /* used by some syscall tests below */ 443 int test_getdents64(const char *dir) 444 { 445 char buffer[4096]; 446 int fd, ret; 447 int err; 448 449 ret = fd = open(dir, O_RDONLY | O_DIRECTORY, 0); 450 if (ret < 0) 451 return ret; 452 453 ret = getdents64(fd, (void *)buffer, sizeof(buffer)); 454 err = errno; 455 close(fd); 456 457 errno = err; 458 return ret; 459 } 460 461 static int test_getpagesize(void) 462 { 463 long x = getpagesize(); 464 int c; 465 466 if (x < 0) 467 return x; 468 469 #if defined(__x86_64__) || defined(__i386__) || defined(__i486__) || defined(__i586__) || defined(__i686__) 470 /* 471 * x86 family is always 4K page. 472 */ 473 c = (x == 4096); 474 #elif defined(__aarch64__) 475 /* 476 * Linux aarch64 supports three values of page size: 4K, 16K, and 64K 477 * which are selected at kernel compilation time. 478 */ 479 c = (x == 4096 || x == (16 * 1024) || x == (64 * 1024)); 480 #else 481 /* 482 * Assuming other architectures must have at least 4K page. 483 */ 484 c = (x >= 4096); 485 #endif 486 487 return !c; 488 } 489 490 static int test_fork(void) 491 { 492 int status; 493 pid_t pid; 494 495 /* flush the printf buffer to avoid child flush it */ 496 fflush(stdout); 497 fflush(stderr); 498 499 pid = fork(); 500 501 switch (pid) { 502 case -1: 503 return 1; 504 505 case 0: 506 exit(123); 507 508 default: 509 pid = waitpid(pid, &status, 0); 510 511 return pid == -1 || !WIFEXITED(status) || WEXITSTATUS(status) != 123; 512 } 513 } 514 515 static int test_stat_timestamps(void) 516 { 517 struct stat st; 518 519 if (sizeof(st.st_atim.tv_sec) != sizeof(st.st_atime)) 520 return 1; 521 522 if (stat("/proc/self/", &st)) 523 return 1; 524 525 if (st.st_atim.tv_sec != st.st_atime || st.st_atim.tv_nsec > 1000000000) 526 return 1; 527 528 if (st.st_mtim.tv_sec != st.st_mtime || st.st_mtim.tv_nsec > 1000000000) 529 return 1; 530 531 if (st.st_ctim.tv_sec != st.st_ctime || st.st_ctim.tv_nsec > 1000000000) 532 return 1; 533 534 return 0; 535 } 536 537 /* Run syscall tests between IDs <min> and <max>. 538 * Return 0 on success, non-zero on failure. 539 */ 540 int run_syscall(int min, int max) 541 { 542 struct timeval tv; 543 struct timezone tz; 544 struct stat stat_buf; 545 int euid0; 546 int proc; 547 int test; 548 int tmp; 549 int ret = 0; 550 void *p1, *p2; 551 552 /* <proc> indicates whether or not /proc is mounted */ 553 proc = stat("/proc", &stat_buf) == 0; 554 555 /* this will be used to skip certain tests that can't be run unprivileged */ 556 euid0 = geteuid() == 0; 557 558 for (test = min; test >= 0 && test <= max; test++) { 559 int llen = 0; /* line length */ 560 561 /* avoid leaving empty lines below, this will insert holes into 562 * test numbers. 563 */ 564 switch (test + __LINE__ + 1) { 565 CASE_TEST(getpid); EXPECT_SYSNE(1, getpid(), -1); break; 566 CASE_TEST(getppid); EXPECT_SYSNE(1, getppid(), -1); break; 567 #ifdef NOLIBC 568 CASE_TEST(gettid); EXPECT_SYSNE(1, gettid(), -1); break; 569 #endif 570 CASE_TEST(getpgid_self); EXPECT_SYSNE(1, getpgid(0), -1); break; 571 CASE_TEST(getpgid_bad); EXPECT_SYSER(1, getpgid(-1), -1, ESRCH); break; 572 CASE_TEST(kill_0); EXPECT_SYSZR(1, kill(getpid(), 0)); break; 573 CASE_TEST(kill_CONT); EXPECT_SYSZR(1, kill(getpid(), 0)); break; 574 CASE_TEST(kill_BADPID); EXPECT_SYSER(1, kill(INT_MAX, 0), -1, ESRCH); break; 575 CASE_TEST(sbrk); if ((p1 = p2 = sbrk(4096)) != (void *)-1) p2 = sbrk(-4096); EXPECT_SYSZR(1, (p2 == (void *)-1) || p2 == p1); break; 576 CASE_TEST(brk); EXPECT_SYSZR(1, brk(sbrk(0))); break; 577 CASE_TEST(chdir_root); EXPECT_SYSZR(1, chdir("/")); break; 578 CASE_TEST(chdir_dot); EXPECT_SYSZR(1, chdir(".")); break; 579 CASE_TEST(chdir_blah); EXPECT_SYSER(1, chdir("/blah"), -1, ENOENT); break; 580 CASE_TEST(chmod_net); EXPECT_SYSZR(proc, chmod("/proc/self/net", 0555)); break; 581 CASE_TEST(chmod_self); EXPECT_SYSER(proc, chmod("/proc/self", 0555), -1, EPERM); break; 582 CASE_TEST(chown_self); EXPECT_SYSER(proc, chown("/proc/self", 0, 0), -1, EPERM); break; 583 CASE_TEST(chroot_root); EXPECT_SYSZR(euid0, chroot("/")); break; 584 CASE_TEST(chroot_blah); EXPECT_SYSER(1, chroot("/proc/self/blah"), -1, ENOENT); break; 585 CASE_TEST(chroot_exe); EXPECT_SYSER(proc, chroot("/proc/self/exe"), -1, ENOTDIR); break; 586 CASE_TEST(close_m1); EXPECT_SYSER(1, close(-1), -1, EBADF); break; 587 CASE_TEST(close_dup); EXPECT_SYSZR(1, close(dup(0))); break; 588 CASE_TEST(dup_0); tmp = dup(0); EXPECT_SYSNE(1, tmp, -1); close(tmp); break; 589 CASE_TEST(dup_m1); tmp = dup(-1); EXPECT_SYSER(1, tmp, -1, EBADF); if (tmp != -1) close(tmp); break; 590 CASE_TEST(dup2_0); tmp = dup2(0, 100); EXPECT_SYSNE(1, tmp, -1); close(tmp); break; 591 CASE_TEST(dup2_m1); tmp = dup2(-1, 100); EXPECT_SYSER(1, tmp, -1, EBADF); if (tmp != -1) close(tmp); break; 592 CASE_TEST(dup3_0); tmp = dup3(0, 100, 0); EXPECT_SYSNE(1, tmp, -1); close(tmp); break; 593 CASE_TEST(dup3_m1); tmp = dup3(-1, 100, 0); EXPECT_SYSER(1, tmp, -1, EBADF); if (tmp != -1) close(tmp); break; 594 CASE_TEST(execve_root); EXPECT_SYSER(1, execve("/", (char*[]){ [0] = "/", [1] = NULL }, NULL), -1, EACCES); break; 595 CASE_TEST(fork); EXPECT_SYSZR(1, test_fork()); break; 596 CASE_TEST(getdents64_root); EXPECT_SYSNE(1, test_getdents64("/"), -1); break; 597 CASE_TEST(getdents64_null); EXPECT_SYSER(1, test_getdents64("/dev/null"), -1, ENOTDIR); break; 598 CASE_TEST(gettimeofday_tv); EXPECT_SYSZR(1, gettimeofday(&tv, NULL)); break; 599 CASE_TEST(gettimeofday_tv_tz);EXPECT_SYSZR(1, gettimeofday(&tv, &tz)); break; 600 CASE_TEST(getpagesize); EXPECT_SYSZR(1, test_getpagesize()); break; 601 CASE_TEST(ioctl_tiocinq); EXPECT_SYSZR(1, ioctl(0, TIOCINQ, &tmp)); break; 602 CASE_TEST(ioctl_tiocinq); EXPECT_SYSZR(1, ioctl(0, TIOCINQ, &tmp)); break; 603 CASE_TEST(link_root1); EXPECT_SYSER(1, link("/", "/"), -1, EEXIST); break; 604 CASE_TEST(link_blah); EXPECT_SYSER(1, link("/proc/self/blah", "/blah"), -1, ENOENT); break; 605 CASE_TEST(link_dir); EXPECT_SYSER(euid0, link("/", "/blah"), -1, EPERM); break; 606 CASE_TEST(link_cross); EXPECT_SYSER(proc, link("/proc/self/net", "/blah"), -1, EXDEV); break; 607 CASE_TEST(lseek_m1); EXPECT_SYSER(1, lseek(-1, 0, SEEK_SET), -1, EBADF); break; 608 CASE_TEST(lseek_0); EXPECT_SYSER(1, lseek(0, 0, SEEK_SET), -1, ESPIPE); break; 609 CASE_TEST(mkdir_root); EXPECT_SYSER(1, mkdir("/", 0755), -1, EEXIST); break; 610 CASE_TEST(open_tty); EXPECT_SYSNE(1, tmp = open("/dev/null", 0), -1); if (tmp != -1) close(tmp); break; 611 CASE_TEST(open_blah); EXPECT_SYSER(1, tmp = open("/proc/self/blah", 0), -1, ENOENT); if (tmp != -1) close(tmp); break; 612 CASE_TEST(poll_null); EXPECT_SYSZR(1, poll(NULL, 0, 0)); break; 613 CASE_TEST(poll_stdout); EXPECT_SYSNE(1, ({ struct pollfd fds = { 1, POLLOUT, 0}; poll(&fds, 1, 0); }), -1); break; 614 CASE_TEST(poll_fault); EXPECT_SYSER(1, poll((void *)1, 1, 0), -1, EFAULT); break; 615 CASE_TEST(prctl); EXPECT_SYSER(1, prctl(PR_SET_NAME, (unsigned long)NULL, 0, 0, 0), -1, EFAULT); break; 616 CASE_TEST(read_badf); EXPECT_SYSER(1, read(-1, &tmp, 1), -1, EBADF); break; 617 CASE_TEST(sched_yield); EXPECT_SYSZR(1, sched_yield()); break; 618 CASE_TEST(select_null); EXPECT_SYSZR(1, ({ struct timeval tv = { 0 }; select(0, NULL, NULL, NULL, &tv); })); break; 619 CASE_TEST(select_stdout); EXPECT_SYSNE(1, ({ fd_set fds; FD_ZERO(&fds); FD_SET(1, &fds); select(2, NULL, &fds, NULL, NULL); }), -1); break; 620 CASE_TEST(select_fault); EXPECT_SYSER(1, select(1, (void *)1, NULL, NULL, 0), -1, EFAULT); break; 621 CASE_TEST(stat_blah); EXPECT_SYSER(1, stat("/proc/self/blah", &stat_buf), -1, ENOENT); break; 622 CASE_TEST(stat_fault); EXPECT_SYSER(1, stat(NULL, &stat_buf), -1, EFAULT); break; 623 CASE_TEST(stat_timestamps); EXPECT_SYSZR(1, test_stat_timestamps()); break; 624 CASE_TEST(symlink_root); EXPECT_SYSER(1, symlink("/", "/"), -1, EEXIST); break; 625 CASE_TEST(unlink_root); EXPECT_SYSER(1, unlink("/"), -1, EISDIR); break; 626 CASE_TEST(unlink_blah); EXPECT_SYSER(1, unlink("/proc/self/blah"), -1, ENOENT); break; 627 CASE_TEST(wait_child); EXPECT_SYSER(1, wait(&tmp), -1, ECHILD); break; 628 CASE_TEST(waitpid_min); EXPECT_SYSER(1, waitpid(INT_MIN, &tmp, WNOHANG), -1, ESRCH); break; 629 CASE_TEST(waitpid_child); EXPECT_SYSER(1, waitpid(getpid(), &tmp, WNOHANG), -1, ECHILD); break; 630 CASE_TEST(write_badf); EXPECT_SYSER(1, write(-1, &tmp, 1), -1, EBADF); break; 631 CASE_TEST(write_zero); EXPECT_SYSZR(1, write(1, &tmp, 0)); break; 632 CASE_TEST(syscall_noargs); EXPECT_SYSEQ(1, syscall(__NR_getpid), getpid()); break; 633 CASE_TEST(syscall_args); EXPECT_SYSER(1, syscall(__NR_statx, 0, NULL, 0, 0, NULL), -1, EFAULT); break; 634 case __LINE__: 635 return ret; /* must be last */ 636 /* note: do not set any defaults so as to permit holes above */ 637 } 638 } 639 return ret; 640 } 641 642 int run_stdlib(int min, int max) 643 { 644 int test; 645 int tmp; 646 int ret = 0; 647 void *p1, *p2; 648 649 for (test = min; test >= 0 && test <= max; test++) { 650 int llen = 0; /* line length */ 651 652 /* avoid leaving empty lines below, this will insert holes into 653 * test numbers. 654 */ 655 switch (test + __LINE__ + 1) { 656 CASE_TEST(getenv_TERM); EXPECT_STRNZ(1, getenv("TERM")); break; 657 CASE_TEST(getenv_blah); EXPECT_STRZR(1, getenv("blah")); break; 658 CASE_TEST(setcmp_blah_blah); EXPECT_EQ(1, strcmp("blah", "blah"), 0); break; 659 CASE_TEST(setcmp_blah_blah2); EXPECT_NE(1, strcmp("blah", "blah2"), 0); break; 660 CASE_TEST(setncmp_blah_blah); EXPECT_EQ(1, strncmp("blah", "blah", 10), 0); break; 661 CASE_TEST(setncmp_blah_blah4); EXPECT_EQ(1, strncmp("blah", "blah4", 4), 0); break; 662 CASE_TEST(setncmp_blah_blah5); EXPECT_NE(1, strncmp("blah", "blah5", 5), 0); break; 663 CASE_TEST(setncmp_blah_blah6); EXPECT_NE(1, strncmp("blah", "blah6", 6), 0); break; 664 CASE_TEST(strchr_foobar_o); EXPECT_STREQ(1, strchr("foobar", 'o'), "oobar"); break; 665 CASE_TEST(strchr_foobar_z); EXPECT_STRZR(1, strchr("foobar", 'z')); break; 666 CASE_TEST(strrchr_foobar_o); EXPECT_STREQ(1, strrchr("foobar", 'o'), "obar"); break; 667 CASE_TEST(strrchr_foobar_z); EXPECT_STRZR(1, strrchr("foobar", 'z')); break; 668 CASE_TEST(memcmp_20_20); EXPECT_EQ(1, memcmp("aaa\x20", "aaa\x20", 4), 0); break; 669 CASE_TEST(memcmp_20_60); EXPECT_LT(1, memcmp("aaa\x20", "aaa\x60", 4), 0); break; 670 CASE_TEST(memcmp_60_20); EXPECT_GT(1, memcmp("aaa\x60", "aaa\x20", 4), 0); break; 671 CASE_TEST(memcmp_20_e0); EXPECT_LT(1, memcmp("aaa\x20", "aaa\xe0", 4), 0); break; 672 CASE_TEST(memcmp_e0_20); EXPECT_GT(1, memcmp("aaa\xe0", "aaa\x20", 4), 0); break; 673 CASE_TEST(memcmp_80_e0); EXPECT_LT(1, memcmp("aaa\x80", "aaa\xe0", 4), 0); break; 674 CASE_TEST(memcmp_e0_80); EXPECT_GT(1, memcmp("aaa\xe0", "aaa\x80", 4), 0); break; 675 CASE_TEST(limit_int8_max); EXPECT_EQ(1, INT8_MAX, (int8_t) 0x7f); break; 676 CASE_TEST(limit_int8_min); EXPECT_EQ(1, INT8_MIN, (int8_t) 0x80); break; 677 CASE_TEST(limit_uint8_max); EXPECT_EQ(1, UINT8_MAX, (uint8_t) 0xff); break; 678 CASE_TEST(limit_int16_max); EXPECT_EQ(1, INT16_MAX, (int16_t) 0x7fff); break; 679 CASE_TEST(limit_int16_min); EXPECT_EQ(1, INT16_MIN, (int16_t) 0x8000); break; 680 CASE_TEST(limit_uint16_max); EXPECT_EQ(1, UINT16_MAX, (uint16_t) 0xffff); break; 681 CASE_TEST(limit_int32_max); EXPECT_EQ(1, INT32_MAX, (int32_t) 0x7fffffff); break; 682 CASE_TEST(limit_int32_min); EXPECT_EQ(1, INT32_MIN, (int32_t) 0x80000000); break; 683 CASE_TEST(limit_uint32_max); EXPECT_EQ(1, UINT32_MAX, (uint32_t) 0xffffffff); break; 684 CASE_TEST(limit_int64_max); EXPECT_EQ(1, INT64_MAX, (int64_t) 0x7fffffffffffffff); break; 685 CASE_TEST(limit_int64_min); EXPECT_EQ(1, INT64_MIN, (int64_t) 0x8000000000000000); break; 686 CASE_TEST(limit_uint64_max); EXPECT_EQ(1, UINT64_MAX, (uint64_t) 0xffffffffffffffff); break; 687 CASE_TEST(limit_int_least8_max); EXPECT_EQ(1, INT_LEAST8_MAX, (int_least8_t) 0x7f); break; 688 CASE_TEST(limit_int_least8_min); EXPECT_EQ(1, INT_LEAST8_MIN, (int_least8_t) 0x80); break; 689 CASE_TEST(limit_uint_least8_max); EXPECT_EQ(1, UINT_LEAST8_MAX, (uint_least8_t) 0xff); break; 690 CASE_TEST(limit_int_least16_max); EXPECT_EQ(1, INT_LEAST16_MAX, (int_least16_t) 0x7fff); break; 691 CASE_TEST(limit_int_least16_min); EXPECT_EQ(1, INT_LEAST16_MIN, (int_least16_t) 0x8000); break; 692 CASE_TEST(limit_uint_least16_max); EXPECT_EQ(1, UINT_LEAST16_MAX, (uint_least16_t) 0xffff); break; 693 CASE_TEST(limit_int_least32_max); EXPECT_EQ(1, INT_LEAST32_MAX, (int_least32_t) 0x7fffffff); break; 694 CASE_TEST(limit_int_least32_min); EXPECT_EQ(1, INT_LEAST32_MIN, (int_least32_t) 0x80000000); break; 695 CASE_TEST(limit_uint_least32_max); EXPECT_EQ(1, UINT_LEAST32_MAX, (uint_least32_t) 0xffffffffU); break; 696 CASE_TEST(limit_int_least64_min); EXPECT_EQ(1, INT_LEAST64_MIN, (int_least64_t) 0x8000000000000000LL); break; 697 CASE_TEST(limit_int_least64_max); EXPECT_EQ(1, INT_LEAST64_MAX, (int_least64_t) 0x7fffffffffffffffLL); break; 698 CASE_TEST(limit_uint_least64_max); EXPECT_EQ(1, UINT_LEAST64_MAX, (uint_least64_t) 0xffffffffffffffffULL); break; 699 CASE_TEST(limit_int_fast8_max); EXPECT_EQ(1, INT_FAST8_MAX, (int_fast8_t) 0x7f); break; 700 CASE_TEST(limit_int_fast8_min); EXPECT_EQ(1, INT_FAST8_MIN, (int_fast8_t) 0x80); break; 701 CASE_TEST(limit_uint_fast8_max); EXPECT_EQ(1, UINT_FAST8_MAX, (uint_fast8_t) 0xff); break; 702 CASE_TEST(limit_int_fast16_min); EXPECT_EQ(1, INT_FAST16_MIN, (int_fast16_t) INTPTR_MIN); break; 703 CASE_TEST(limit_int_fast16_max); EXPECT_EQ(1, INT_FAST16_MAX, (int_fast16_t) INTPTR_MAX); break; 704 CASE_TEST(limit_uint_fast16_max); EXPECT_EQ(1, UINT_FAST16_MAX, (uint_fast16_t) UINTPTR_MAX); break; 705 CASE_TEST(limit_int_fast32_min); EXPECT_EQ(1, INT_FAST32_MIN, (int_fast32_t) INTPTR_MIN); break; 706 CASE_TEST(limit_int_fast32_max); EXPECT_EQ(1, INT_FAST32_MAX, (int_fast32_t) INTPTR_MAX); break; 707 CASE_TEST(limit_uint_fast32_max); EXPECT_EQ(1, UINT_FAST32_MAX, (uint_fast32_t) UINTPTR_MAX); break; 708 CASE_TEST(limit_int_fast64_min); EXPECT_EQ(1, INT_FAST64_MIN, (int_fast64_t) INT64_MIN); break; 709 CASE_TEST(limit_int_fast64_max); EXPECT_EQ(1, INT_FAST64_MAX, (int_fast64_t) INT64_MAX); break; 710 CASE_TEST(limit_uint_fast64_max); EXPECT_EQ(1, UINT_FAST64_MAX, (uint_fast64_t) UINT64_MAX); break; 711 #if __SIZEOF_LONG__ == 8 712 CASE_TEST(limit_intptr_min); EXPECT_EQ(1, INTPTR_MIN, (intptr_t) 0x8000000000000000LL); break; 713 CASE_TEST(limit_intptr_max); EXPECT_EQ(1, INTPTR_MAX, (intptr_t) 0x7fffffffffffffffLL); break; 714 CASE_TEST(limit_uintptr_max); EXPECT_EQ(1, UINTPTR_MAX, (uintptr_t) 0xffffffffffffffffULL); break; 715 CASE_TEST(limit_ptrdiff_min); EXPECT_EQ(1, PTRDIFF_MIN, (ptrdiff_t) 0x8000000000000000LL); break; 716 CASE_TEST(limit_ptrdiff_max); EXPECT_EQ(1, PTRDIFF_MAX, (ptrdiff_t) 0x7fffffffffffffffLL); break; 717 CASE_TEST(limit_size_max); EXPECT_EQ(1, SIZE_MAX, (size_t) 0xffffffffffffffffULL); break; 718 #elif __SIZEOF_LONG__ == 4 719 CASE_TEST(limit_intptr_min); EXPECT_EQ(1, INTPTR_MIN, (intptr_t) 0x80000000); break; 720 CASE_TEST(limit_intptr_max); EXPECT_EQ(1, INTPTR_MAX, (intptr_t) 0x7fffffff); break; 721 CASE_TEST(limit_uintptr_max); EXPECT_EQ(1, UINTPTR_MAX, (uintptr_t) 0xffffffffU); break; 722 CASE_TEST(limit_ptrdiff_min); EXPECT_EQ(1, PTRDIFF_MIN, (ptrdiff_t) 0x80000000); break; 723 CASE_TEST(limit_ptrdiff_max); EXPECT_EQ(1, PTRDIFF_MAX, (ptrdiff_t) 0x7fffffff); break; 724 CASE_TEST(limit_size_max); EXPECT_EQ(1, SIZE_MAX, (size_t) 0xffffffffU); break; 725 #else 726 # warning "__SIZEOF_LONG__ is undefined" 727 #endif /* __SIZEOF_LONG__ */ 728 case __LINE__: 729 return ret; /* must be last */ 730 /* note: do not set any defaults so as to permit holes above */ 731 } 732 } 733 return ret; 734 } 735 736 #define EXPECT_VFPRINTF(c, expected, fmt, ...) \ 737 ret += expect_vfprintf(llen, c, expected, fmt, ##__VA_ARGS__) 738 739 static int expect_vfprintf(int llen, size_t c, const char *expected, const char *fmt, ...) 740 { 741 int ret, fd, w, r; 742 char buf[100]; 743 FILE *memfile; 744 va_list args; 745 746 fd = memfd_create("vfprintf", 0); 747 if (fd == -1) { 748 pad_spc(llen, 64, "[FAIL]\n"); 749 return 1; 750 } 751 752 memfile = fdopen(fd, "w+"); 753 if (!memfile) { 754 pad_spc(llen, 64, "[FAIL]\n"); 755 return 1; 756 } 757 758 va_start(args, fmt); 759 w = vfprintf(memfile, fmt, args); 760 va_end(args); 761 762 if (w != c) { 763 llen += printf(" written(%d) != %d", w, (int) c); 764 pad_spc(llen, 64, "[FAIL]\n"); 765 return 1; 766 } 767 768 fflush(memfile); 769 lseek(fd, 0, SEEK_SET); 770 771 r = read(fd, buf, sizeof(buf) - 1); 772 buf[r] = '\0'; 773 774 fclose(memfile); 775 776 if (r != w) { 777 llen += printf(" written(%d) != read(%d)", w, r); 778 pad_spc(llen, 64, "[FAIL]\n"); 779 return 1; 780 } 781 782 llen += printf(" \"%s\" = \"%s\"", expected, buf); 783 ret = strncmp(expected, buf, c); 784 785 pad_spc(llen, 64, ret ? "[FAIL]\n" : " [OK]\n"); 786 return ret; 787 } 788 789 static int run_vfprintf(int min, int max) 790 { 791 int test; 792 int tmp; 793 int ret = 0; 794 void *p1, *p2; 795 796 for (test = min; test >= 0 && test <= max; test++) { 797 int llen = 0; /* line length */ 798 799 /* avoid leaving empty lines below, this will insert holes into 800 * test numbers. 801 */ 802 switch (test + __LINE__ + 1) { 803 CASE_TEST(empty); EXPECT_VFPRINTF(0, "", ""); break; 804 CASE_TEST(simple); EXPECT_VFPRINTF(3, "foo", "foo"); break; 805 CASE_TEST(string); EXPECT_VFPRINTF(3, "foo", "%s", "foo"); break; 806 CASE_TEST(number); EXPECT_VFPRINTF(4, "1234", "%d", 1234); break; 807 CASE_TEST(negnumber); EXPECT_VFPRINTF(5, "-1234", "%d", -1234); break; 808 CASE_TEST(unsigned); EXPECT_VFPRINTF(5, "12345", "%u", 12345); break; 809 CASE_TEST(char); EXPECT_VFPRINTF(1, "c", "%c", 'c'); break; 810 CASE_TEST(hex); EXPECT_VFPRINTF(1, "f", "%x", 0xf); break; 811 CASE_TEST(pointer); EXPECT_VFPRINTF(3, "0x1", "%p", (void *) 0x1); break; 812 case __LINE__: 813 return ret; /* must be last */ 814 /* note: do not set any defaults so as to permit holes above */ 815 } 816 } 817 return ret; 818 } 819 820 static int smash_stack(void) 821 { 822 char buf[100]; 823 volatile char *ptr = buf; 824 size_t i; 825 826 for (i = 0; i < 200; i++) 827 ptr[i] = 'P'; 828 829 return 1; 830 } 831 832 static int run_protection(int min, int max) 833 { 834 pid_t pid; 835 int llen = 0, status; 836 837 llen += printf("0 -fstackprotector "); 838 839 #if !defined(_NOLIBC_STACKPROTECTOR) 840 llen += printf("not supported"); 841 pad_spc(llen, 64, "[SKIPPED]\n"); 842 return 0; 843 #endif 844 845 #if defined(_NOLIBC_STACKPROTECTOR) 846 if (!__stack_chk_guard) { 847 llen += printf("__stack_chk_guard not initialized"); 848 pad_spc(llen, 64, "[FAIL]\n"); 849 return 1; 850 } 851 #endif 852 853 pid = -1; 854 pid = fork(); 855 856 switch (pid) { 857 case -1: 858 llen += printf("fork()"); 859 pad_spc(llen, 64, "[FAIL]\n"); 860 return 1; 861 862 case 0: 863 close(STDOUT_FILENO); 864 close(STDERR_FILENO); 865 866 prctl(PR_SET_DUMPABLE, 0, 0, 0, 0); 867 smash_stack(); 868 return 1; 869 870 default: 871 pid = waitpid(pid, &status, 0); 872 873 if (pid == -1 || !WIFSIGNALED(status) || WTERMSIG(status) != SIGABRT) { 874 llen += printf("waitpid()"); 875 pad_spc(llen, 64, "[FAIL]\n"); 876 return 1; 877 } 878 pad_spc(llen, 64, " [OK]\n"); 879 return 0; 880 } 881 } 882 883 /* prepare what needs to be prepared for pid 1 (stdio, /dev, /proc, etc) */ 884 int prepare(void) 885 { 886 struct stat stat_buf; 887 888 /* It's possible that /dev doesn't even exist or was not mounted, so 889 * we'll try to create it, mount it, or create minimal entries into it. 890 * We want at least /dev/null and /dev/console. 891 */ 892 if (stat("/dev/.", &stat_buf) == 0 || mkdir("/dev", 0755) == 0) { 893 if (stat("/dev/console", &stat_buf) != 0 || 894 stat("/dev/null", &stat_buf) != 0) { 895 /* try devtmpfs first, otherwise fall back to manual creation */ 896 if (mount("/dev", "/dev", "devtmpfs", 0, 0) != 0) { 897 mknod("/dev/console", 0600 | S_IFCHR, makedev(5, 1)); 898 mknod("/dev/null", 0666 | S_IFCHR, makedev(1, 3)); 899 } 900 } 901 } 902 903 /* If no /dev/console was found before calling init, stdio is closed so 904 * we need to reopen it from /dev/console. If it failed above, it will 905 * still fail here and we cannot emit a message anyway. 906 */ 907 if (close(dup(1)) == -1) { 908 int fd = open("/dev/console", O_RDWR); 909 910 if (fd >= 0) { 911 if (fd != 0) 912 dup2(fd, 0); 913 if (fd != 1) 914 dup2(fd, 1); 915 if (fd != 2) 916 dup2(fd, 2); 917 if (fd > 2) 918 close(fd); 919 puts("\nSuccessfully reopened /dev/console."); 920 } 921 } 922 923 /* try to mount /proc if not mounted. Silently fail otherwise */ 924 if (stat("/proc/.", &stat_buf) == 0 || mkdir("/proc", 0755) == 0) { 925 if (stat("/proc/self", &stat_buf) != 0) 926 mount("/proc", "/proc", "proc", 0, 0); 927 } 928 929 return 0; 930 } 931 932 /* This is the definition of known test names, with their functions */ 933 static const struct test test_names[] = { 934 /* add new tests here */ 935 { .name = "syscall", .func = run_syscall }, 936 { .name = "stdlib", .func = run_stdlib }, 937 { .name = "vfprintf", .func = run_vfprintf }, 938 { .name = "protection", .func = run_protection }, 939 { 0 } 940 }; 941 942 int main(int argc, char **argv, char **envp) 943 { 944 int min = 0; 945 int max = INT_MAX; 946 int ret = 0; 947 int err; 948 int idx; 949 char *test; 950 951 environ = envp; 952 953 /* when called as init, it's possible that no console was opened, for 954 * example if no /dev file system was provided. We'll check that fd#1 955 * was opened, and if not we'll attempt to create and open /dev/console 956 * and /dev/null that we'll use for later tests. 957 */ 958 if (getpid() == 1) 959 prepare(); 960 961 /* the definition of a series of tests comes from either argv[1] or the 962 * "NOLIBC_TEST" environment variable. It's made of a comma-delimited 963 * series of test names and optional ranges: 964 * syscall:5-15[:.*],stdlib:8-10 965 */ 966 test = argv[1]; 967 if (!test) 968 test = getenv("NOLIBC_TEST"); 969 970 if (test) { 971 char *comma, *colon, *dash, *value; 972 973 do { 974 comma = strchr(test, ','); 975 if (comma) 976 *(comma++) = '\0'; 977 978 colon = strchr(test, ':'); 979 if (colon) 980 *(colon++) = '\0'; 981 982 for (idx = 0; test_names[idx].name; idx++) { 983 if (strcmp(test, test_names[idx].name) == 0) 984 break; 985 } 986 987 if (test_names[idx].name) { 988 /* The test was named, it will be called at least 989 * once. We may have an optional range at <colon> 990 * here, which defaults to the full range. 991 */ 992 do { 993 min = 0; max = INT_MAX; 994 value = colon; 995 if (value && *value) { 996 colon = strchr(value, ':'); 997 if (colon) 998 *(colon++) = '\0'; 999 1000 dash = strchr(value, '-'); 1001 if (dash) 1002 *(dash++) = '\0'; 1003 1004 /* support :val: :min-max: :min-: :-max: */ 1005 if (*value) 1006 min = atoi(value); 1007 if (!dash) 1008 max = min; 1009 else if (*dash) 1010 max = atoi(dash); 1011 1012 value = colon; 1013 } 1014 1015 /* now's time to call the test */ 1016 printf("Running test '%s'\n", test_names[idx].name); 1017 err = test_names[idx].func(min, max); 1018 ret += err; 1019 printf("Errors during this test: %d\n\n", err); 1020 } while (colon && *colon); 1021 } else 1022 printf("Ignoring unknown test name '%s'\n", test); 1023 1024 test = comma; 1025 } while (test && *test); 1026 } else { 1027 /* no test mentioned, run everything */ 1028 for (idx = 0; test_names[idx].name; idx++) { 1029 printf("Running test '%s'\n", test_names[idx].name); 1030 err = test_names[idx].func(min, max); 1031 ret += err; 1032 printf("Errors during this test: %d\n\n", err); 1033 } 1034 } 1035 1036 printf("Total number of errors: %d\n", ret); 1037 1038 if (getpid() == 1) { 1039 /* we're running as init, there's no other process on the 1040 * system, thus likely started from a VM for a quick check. 1041 * Exiting will provoke a kernel panic that may be reported 1042 * as an error by Qemu or the hypervisor, while stopping 1043 * cleanly will often be reported as a success. This allows 1044 * to use the output of this program for bisecting kernels. 1045 */ 1046 printf("Leaving init with final status: %d\n", !!ret); 1047 if (ret == 0) 1048 reboot(LINUX_REBOOT_CMD_POWER_OFF); 1049 #if defined(__x86_64__) 1050 /* QEMU started with "-device isa-debug-exit -no-reboot" will 1051 * exit with status code 2N+1 when N is written to 0x501. We 1052 * hard-code the syscall here as it's arch-dependent. 1053 */ 1054 #if defined(_NOLIBC_SYS_H) 1055 else if (my_syscall3(__NR_ioperm, 0x501, 1, 1) == 0) 1056 #else 1057 else if (ioperm(0x501, 1, 1) == 0) 1058 #endif 1059 __asm__ volatile ("outb %%al, %%dx" :: "d"(0x501), "a"(0)); 1060 /* if it does nothing, fall back to the regular panic */ 1061 #endif 1062 } 1063 1064 printf("Exiting with status %d\n", !!ret); 1065 return !!ret; 1066 } 1067