1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright (c) 1992, 2010, Oracle and/or its affiliates. All rights reserved. 24 * Copyright 2014 Garrett D'Amore <garrett@damore.org> 25 * Copyright 2016 Joyent, Inc. 26 */ 27 28 /* 29 * Implementation of all external interfaces between ld.so.1 and libc. 30 * 31 * This file started as a set of routines that provided synchronization and 32 * locking operations using calls to libthread. libthread has merged with libc 33 * under the Unified Process Model (UPM), and things have gotten a lot simpler. 34 * This file continues to establish and redirect various events within ld.so.1 35 * to interfaces within libc. 36 * 37 * Until libc is loaded and relocated, any external interfaces are captured 38 * locally. Each link-map list maintains its own set of external vectors, as 39 * each link-map list typically provides its own libc. Although this per-link- 40 * map list vectoring provides a degree of flexibility, there is a protocol 41 * expected when calling various libc interfaces. 42 * 43 * i. Any new alternative link-map list should call CI_THRINIT, and then call 44 * CI_TLS_MODADD to register any TLS for each object of that link-map list 45 * (this item is labeled i. as auditors can be the first objects loaded, 46 * and they exist on their own lik-map list). 47 * 48 * ii. For the primary link-map list, CI_TLS_STATMOD must be called first to 49 * register any static TLS. This routine is called regardless of there 50 * being any TLS, as this routine also establishes the link-map list as the 51 * primary list and fixes the association of uberdata). CI_THRINIT should 52 * then be called. 53 * 54 * iii. Any objects added to an existing link-map list (primary or alternative) 55 * should call CI_TLS_MODADD to register any additional TLS. 56 * 57 * These events are established by: 58 * 59 * i. Typically, libc is loaded as part of the primary dependencies of any 60 * link-map list (since the Unified Process Model (UPM), libc can't be 61 * lazily loaded). To minimize the possibility of loading and registering 62 * objects, and then tearing them down (because of a relocation error), 63 * external vectors are established as part of load_completion(). This 64 * routine is called on completion of any operation that can cause objects 65 * to be loaded. This point of control insures the objects have been fully 66 * analyzed and relocated, and moved to their controlling link-map list. 67 * The external vectors are established prior to any .inits being fired. 68 * 69 * ii. Calls to CI_THRINIT, and CI_TLS_MODADD also occur as part of 70 * load_completion(). CI_THRINIT is only called once for each link-map 71 * control list. 72 * 73 * iii. Calls to CI_TLS_STATMOD, and CI_THRINIT occur for the primary link-map 74 * list in the final stages of setup(). 75 * 76 * The interfaces provide by libc can be divided into two families. The first 77 * family consists of those interfaces that should be called from the link-map 78 * list. It's possible that these interfaces convey state concerning the 79 * link-map list they are part of: 80 * 81 * CI_ATEXIT 82 * CI TLS_MODADD 83 * CI_TLS_MODREM 84 * CI_TLS_STATMOD 85 * CI_THRINIT 86 * 87 * The second family are global in nature, that is, the link-map list from 88 * which they are called provides no state information. In fact, for 89 * CI_BIND_GUARD, the calling link-map isn't even known. The link-map can only 90 * be deduced after ld.so.1's global lock has been obtained. Therefore, the 91 * following interfaces are also maintained as global: 92 * 93 * CI_LCMESSAGES 94 * CI_BIND_GUARD 95 * CI_BIND_CLEAR 96 * CI_THR_SELF 97 * 98 * Note, it is possible that these global interfaces are obtained from an 99 * alternative link-map list that gets torn down because of a processing 100 * failure (unlikely, because the link-map list components must be analyzed 101 * and relocated prior to load_completion(), but perhaps the tear down is still 102 * a possibility). Thus the global interfaces may have to be replaced. Once 103 * the interfaces have been obtained from the primary link-map, they can 104 * remain fixed, as the primary link-map isn't going to go anywhere. 105 * 106 * The last wrinkle in the puzzle is what happens if an alternative link-map 107 * is loaded with no libc dependency? In this case, the alternative objects 108 * can not call CI_THRINIT, can not be allowed to use TLS, and will not receive 109 * any atexit processing. 110 * 111 * The history of these external interfaces is defined by their version: 112 * 113 * TI_VERSION == 1 114 * Under this model libthread provided rw_rwlock/rw_unlock, through which 115 * all rt_mutex_lock/rt_mutex_unlock calls were vectored. 116 * Under libc/libthread these interfaces provided _sigon/_sigoff (unlike 117 * lwp/libthread that provided signal blocking via bind_guard/bind_clear). 118 * 119 * TI_VERSION == 2 120 * Under this model only libthreads bind_guard/bind_clear and thr_self 121 * interfaces were used. Both libthreads blocked signals under the 122 * bind_guard/bind_clear interfaces. Lower level locking is derived 123 * from internally bound _lwp_ interfaces. This removes recursive 124 * problems encountered when obtaining locking interfaces from libthread. 125 * The use of mutexes over reader/writer locks also enables the use of 126 * condition variables for controlling thread concurrency (allows access 127 * to objects only after their .init has completed). 128 * 129 * NOTE, the TI_VERSION indicated the ti_interface version number, where the 130 * ti_interface was a large vector of functions passed to both libc (to override 131 * the thread stub interfaces) and ld.so.1. ld.so.1 used only a small subset of 132 * these interfaces. 133 * 134 * CI_VERSION == 1 135 * Introduced with CI_VERSION & CI_ATEXIT 136 * 137 * CI_VERSION == 2 (Solaris 8 update 2). 138 * Added support for CI_LCMESSAGES 139 * 140 * CI_VERSION == 3 (Solaris 9). 141 * Added the following versions to the CI table: 142 * 143 * CI_BIND_GUARD, CI_BIND_CLEAR, CI_THR_SELF 144 * CI_TLS_MODADD, CI_TLS_MOD_REMOVE, CI_TLS_STATMOD 145 * 146 * This version introduced the DT_SUNW_RTLDINFO structure as a mechanism 147 * to handshake with ld.so.1. 148 * 149 * CI_VERSION == 4 (Solaris 10). 150 * Added the CI_THRINIT handshake as part of the libc/libthread unified 151 * process model. libc now initializes the current thread pointer from 152 * this interface (and no longer relies on the INITFIRST flag - which 153 * others have started to camp out on). 154 * 155 * CI_VERSION == 5 (Solaris 11). 156 * Use of "protected" references within libc, so that symbols are 157 * pre-bound, and don't require ld.so.1 binding. This implementation 158 * protects libc's critical regions from being vectored to auditors. 159 * 160 * CI_VERSION == 6 (Solaris 11). 161 * Added the CI_CRITICAL handshake, to allow "mem*" family to be reexposed 162 * as "global", and thus be redirected to auxiliary filters. 163 * 164 * Release summary: 165 * 166 * Solaris 8 CI_ATEXIT via _ld_libc() 167 * TI_* via _ld_concurrency() 168 * 169 * Solaris 9 CI_ATEXIT and CI_LCMESSAGES via _ld_libc() 170 * CI_* via RTLDINFO and _ld_libc() - new libthread 171 * TI_* via _ld_concurrency() - old libthread 172 * 173 * Solaris 10 CI_ATEXIT and CI_LCMESSAGES via _ld_libc() 174 * CI_* via RTLDINFO and _ld_libc() - new libthread 175 */ 176 177 #include <sys/debug.h> 178 #include <synch.h> 179 #include <signal.h> 180 #include <thread.h> 181 #include <synch.h> 182 #include <strings.h> 183 #include <stdio.h> 184 #include <debug.h> 185 #include <libc_int.h> 186 #include "_elf.h" 187 #include "_rtld.h" 188 189 /* 190 * This interface provides the unified process model communication between 191 * ld.so.1 and libc. This interface can be called a number of times: 192 * 193 * - Initially, this interface is called to process RTLDINFO. This data 194 * structure is typically provided by libc, and contains the address of 195 * libc interfaces that must be called to initialize threads information. 196 * 197 * - _ld_libc(), this interface can also be called by libc at process 198 * initialization, after libc has been loaded and relocated, but before 199 * control has been passed to any user code (.init's or main()). This 200 * call provides additional libc interface information that ld.so.1 must 201 * call during process execution. 202 * 203 * - _ld_libc() can also be called by libc during process execution to 204 * re-establish interfaces such as the locale. 205 */ 206 static void 207 get_lcinterface(Rt_map *lmp, Lc_interface *funcs) 208 { 209 int threaded = 0, entry = 0, tag; 210 Lm_list *lml; 211 Lc_desc *lcp; 212 213 if ((lmp == NULL) || (funcs == NULL)) 214 return; 215 216 /* 217 * Once the process is active, ensure we grab a lock. 218 */ 219 if (rtld_flags & RT_FL_APPLIC) 220 entry = enter(0); 221 222 lml = LIST(lmp); 223 lcp = &lml->lm_lcs[0]; 224 225 DBG_CALL(Dbg_util_nl(lml, DBG_NL_STD)); 226 227 for (tag = funcs->ci_tag; tag; tag = (++funcs)->ci_tag) { 228 char *gptr; 229 char *lptr = funcs->ci_un.ci_ptr; 230 231 DBG_CALL(Dbg_util_lcinterface(lmp, tag, lptr)); 232 233 if (tag >= CI_MAX) 234 continue; 235 236 /* 237 * Maintain all interfaces on a per-link-map basis. Note, for 238 * most interfaces, only the first interface is used for any 239 * link-map list. This prevents accidents with developers who 240 * manage to load two different versions of libc. 241 */ 242 if ((lcp[tag].lc_lmp) && 243 (tag != CI_LCMESSAGES) && (tag != CI_VERSION)) { 244 DBG_CALL(Dbg_unused_lcinterface(lmp, 245 lcp[tag].lc_lmp, tag)); 246 continue; 247 } 248 249 lcp[tag].lc_un.lc_ptr = lptr; 250 lcp[tag].lc_lmp = lmp; 251 252 gptr = glcs[tag].lc_un.lc_ptr; 253 254 /* 255 * Process any interfaces that must be maintained on a global 256 * basis. 257 */ 258 switch (tag) { 259 case CI_ATEXIT: 260 break; 261 262 case CI_LCMESSAGES: 263 /* 264 * At startup, ld.so.1 can establish a locale from one 265 * of the locale family of environment variables (see 266 * ld_str_env() and readenv_user()). During process 267 * execution the locale can also be changed by the user. 268 * This interface is called from libc should the locale 269 * be modified. Presently, only one global locale is 270 * maintained for all link-map lists, and only objects 271 * on the primrary link-map may change this locale. 272 */ 273 if ((lml->lm_flags & LML_FLG_BASELM) && 274 ((gptr == NULL) || (strcmp(gptr, lptr) != 0))) { 275 /* 276 * If we've obtained a message locale (typically 277 * supplied via libc's setlocale()), then 278 * register the locale for use in dgettext() so 279 * as to reestablish the locale for ld.so.1's 280 * messages. 281 */ 282 if (gptr) { 283 free((void *)gptr); 284 rtld_flags |= RT_FL_NEWLOCALE; 285 } 286 glcs[tag].lc_un.lc_ptr = strdup(lptr); 287 288 /* 289 * Clear any cached messages. 290 */ 291 bzero(err_strs, sizeof (err_strs)); 292 nosym_str = NULL; 293 } 294 break; 295 296 case CI_BIND_GUARD: 297 case CI_BIND_CLEAR: 298 case CI_THR_SELF: 299 case CI_CRITICAL: 300 /* 301 * If the global vector is unset, or this is the primary 302 * link-map, set the global vector. 303 */ 304 if ((gptr == NULL) || (lml->lm_flags & LML_FLG_BASELM)) 305 glcs[tag].lc_un.lc_ptr = lptr; 306 307 /* FALLTHROUGH */ 308 309 case CI_TLS_MODADD: 310 case CI_TLS_MODREM: 311 case CI_TLS_STATMOD: 312 case CI_THRINIT: 313 threaded++; 314 break; 315 316 case CI_VERSION: 317 if ((rtld_flags2 & RT_FL2_RTLDSEEN) == 0) { 318 Aliste idx; 319 Lm_list *lml2; 320 int version; 321 322 rtld_flags2 |= RT_FL2_RTLDSEEN; 323 324 version = funcs->ci_un.ci_val; 325 #if defined(CI_V_FIVE) 326 if (version >= CI_V_FIVE) { 327 thr_flg_nolock = THR_FLG_NOLOCK; 328 thr_flg_reenter = THR_FLG_REENTER; 329 } 330 #endif 331 if (version < CI_V_FOUR) 332 break; 333 334 rtld_flags2 |= RT_FL2_UNIFPROC; 335 336 /* 337 * We might have seen an auditor which is not 338 * dependent on libc. Such an auditor's link 339 * map list has LML_FLG_HOLDLOCK set. This 340 * lock needs to be dropped. Refer to 341 * audit_setup() in audit.c. 342 */ 343 if ((rtld_flags2 & RT_FL2_HASAUDIT) == 0) 344 break; 345 346 /* 347 * Yes, we did. Take care of them. 348 */ 349 for (APLIST_TRAVERSE(dynlm_list, idx, lml2)) { 350 Rt_map *map = (Rt_map *)lml2->lm_head; 351 352 if (FLAGS(map) & FLG_RT_AUDIT) { 353 lml2->lm_flags &= 354 ~LML_FLG_HOLDLOCK; 355 } 356 } 357 } 358 break; 359 360 default: 361 break; 362 } 363 } 364 365 if (threaded) { 366 /* 367 * If a version of libc gives us only a subset of the TLS 368 * interfaces, it's confused and we discard the whole lot. 369 */ 370 if ((lcp[CI_TLS_MODADD].lc_un.lc_func && 371 lcp[CI_TLS_MODREM].lc_un.lc_func && 372 lcp[CI_TLS_STATMOD].lc_un.lc_func) == NULL) { 373 lcp[CI_TLS_MODADD].lc_un.lc_func = NULL; 374 lcp[CI_TLS_MODREM].lc_un.lc_func = NULL; 375 lcp[CI_TLS_STATMOD].lc_un.lc_func = NULL; 376 } 377 378 /* 379 * Indicate that we're now thread capable. 380 */ 381 if ((lml->lm_flags & LML_FLG_RTLDLM) == 0) 382 rtld_flags |= RT_FL_THREADS; 383 } 384 385 if (entry) 386 leave(lml, 0); 387 } 388 389 /* 390 * At this point we know we have a set of objects that have been fully analyzed 391 * and relocated. Prior to the next major step of running .init sections (ie. 392 * running user code), retrieve any RTLDINFO interfaces. 393 */ 394 int 395 rt_get_extern(Lm_list *lml, Rt_map *lmp) 396 { 397 if (lml->lm_rti) { 398 Aliste idx; 399 Rti_desc *rti; 400 401 for (ALIST_TRAVERSE(lml->lm_rti, idx, rti)) 402 get_lcinterface(rti->rti_lmp, rti->rti_info); 403 404 free(lml->lm_rti); 405 lml->lm_rti = 0; 406 } 407 408 /* 409 * Perform some sanity checks. If we have TLS requirements we better 410 * have the associated external interfaces. 411 */ 412 if (lml->lm_tls && 413 (lml->lm_lcs[CI_TLS_STATMOD].lc_un.lc_func == NULL)) { 414 eprintf(lml, ERR_FATAL, MSG_INTL(MSG_TLS_NOSUPPORT), 415 NAME(lmp)); 416 return (0); 417 } 418 return (1); 419 } 420 421 /* 422 * Provide an interface for libc to communicate additional interface 423 * information. 424 */ 425 void 426 _ld_libc(void *ptr) 427 { 428 get_lcinterface(_caller(caller(), CL_EXECDEF), (Lc_interface *)ptr); 429 } 430 431 static int bindmask = 0; 432 433 int 434 rt_bind_guard(int flags) 435 { 436 int (*fptr)(int); 437 int bindflag; 438 439 if ((fptr = glcs[CI_BIND_GUARD].lc_un.lc_func) != NULL) { 440 return ((*fptr)(flags)); 441 } else { 442 bindflag = (flags & THR_FLG_RTLD); 443 if ((bindflag & bindmask) == 0) { 444 bindmask |= bindflag; 445 return (1); 446 } 447 return (0); 448 } 449 } 450 451 int 452 rt_bind_clear(int flags) 453 { 454 int (*fptr)(int); 455 int bindflag; 456 457 if ((fptr = glcs[CI_BIND_CLEAR].lc_un.lc_func) != NULL) { 458 return ((*fptr)(flags)); 459 } else { 460 bindflag = (flags & THR_FLG_RTLD); 461 if (bindflag == 0) 462 return (bindmask); 463 else { 464 bindmask &= ~bindflag; 465 return (0); 466 } 467 } 468 } 469 470 /* 471 * Make sure threads have been initialized. This interface is called once for 472 * each link-map list. 473 */ 474 void 475 rt_thr_init(Lm_list *lml) 476 { 477 void (*fptr)(void); 478 479 if ((fptr = 480 (void (*)())lml->lm_lcs[CI_THRINIT].lc_un.lc_func) != NULL) { 481 lml->lm_lcs[CI_THRINIT].lc_un.lc_func = NULL; 482 483 leave(lml, thr_flg_reenter); 484 (*fptr)(); 485 (void) enter(thr_flg_reenter); 486 487 /* 488 * If this is an alternative link-map list, and this is the 489 * first call to initialize threads, don't let the destination 490 * libc be deleted. It is possible that an auditors complete 491 * initialization fails, but there is presently no main link-map 492 * list. As this libc has established the thread pointer, don't 493 * delete this libc, otherwise the initialization of libc on the 494 * main link-map can be compromised during its threads 495 * initialization. 496 */ 497 if (((lml->lm_flags & LML_FLG_BASELM) == 0) && 498 ((rtld_flags2 & RT_FL2_PLMSETUP) == 0)) 499 MODE(lml->lm_lcs[CI_THRINIT].lc_lmp) |= RTLD_NODELETE; 500 } 501 } 502 503 thread_t 504 rt_thr_self() 505 { 506 thread_t (*fptr)(void); 507 508 if ((fptr = (thread_t (*)())glcs[CI_THR_SELF].lc_un.lc_func) != NULL) 509 return ((*fptr)()); 510 511 return (1); 512 } 513 514 int 515 rt_mutex_lock(Rt_lock *mp) 516 { 517 return (_lwp_mutex_lock((lwp_mutex_t *)mp)); 518 } 519 520 int 521 rt_mutex_unlock(Rt_lock *mp) 522 { 523 return (_lwp_mutex_unlock((lwp_mutex_t *)mp)); 524 } 525 526 /* 527 * Test whether we're in a libc critical region. Certain function references, 528 * like the "mem*" family, might require binding. Although these functions can 529 * safely bind to auxiliary filtees, they should not be captured by auditors. 530 */ 531 int 532 rt_critical() 533 { 534 int (*fptr)(void); 535 536 if ((fptr = glcs[CI_CRITICAL].lc_un.lc_func) != NULL) 537 return ((*fptr)()); 538 539 return (0); 540 } 541 542 /* 543 * Mutex interfaces to resolve references from any objects extracted from 544 * libc_pic.a. Note, as ld.so.1 is essentially single threaded these can be 545 * noops. 546 */ 547 #pragma weak lmutex_lock = mutex_lock 548 /* ARGSUSED */ 549 int 550 mutex_lock(mutex_t *mp) 551 { 552 return (0); 553 } 554 555 #pragma weak lmutex_unlock = mutex_unlock 556 /* ARGSUSED */ 557 int 558 mutex_unlock(mutex_t *mp) 559 { 560 return (0); 561 } 562 563 /* ARGSUSED */ 564 int 565 mutex_init(mutex_t *mp, int type, void *arg) 566 { 567 return (0); 568 } 569 570 /* ARGSUSED */ 571 int 572 mutex_destroy(mutex_t *mp) 573 { 574 return (0); 575 } 576 577 /* 578 * This is needed to satisfy sysconf() (case _SC_THREAD_STACK_MIN) 579 */ 580 size_t 581 thr_min_stack() 582 { 583 return (sizeof (uintptr_t) * 1024); 584 } 585 586 /* 587 * Local str[n]casecmp() interfaces for the dynamic linker, 588 * to avoid problems when linking with libc_pic.a 589 */ 590 int 591 strcasecmp(const char *s1, const char *s2) 592 { 593 extern int ascii_strcasecmp(const char *, const char *); 594 595 return (ascii_strcasecmp(s1, s2)); 596 } 597 598 int 599 strncasecmp(const char *s1, const char *s2, size_t n) 600 { 601 extern int ascii_strncasecmp(const char *, const char *, size_t); 602 603 return (ascii_strncasecmp(s1, s2, n)); 604 } 605 606 /* 607 * The following functions are cancellation points in libc. 608 * They are called from other functions in libc that we extract 609 * and use directly. We don't do cancellation while we are in 610 * the dynamic linker, so we redefine these to call the primitive, 611 * non-cancellation interfaces. 612 */ 613 int 614 close(int fildes) 615 { 616 extern int __close(int); 617 618 return (__close(fildes)); 619 } 620 621 int 622 fcntl(int fildes, int cmd, ...) 623 { 624 extern int __fcntl(int, int, ...); 625 intptr_t arg; 626 va_list ap; 627 628 va_start(ap, cmd); 629 arg = va_arg(ap, intptr_t); 630 va_end(ap); 631 return (__fcntl(fildes, cmd, arg)); 632 } 633 634 int 635 open(const char *path, int oflag, ...) 636 { 637 extern int __open(const char *, int, mode_t); 638 mode_t mode; 639 va_list ap; 640 641 va_start(ap, oflag); 642 mode = va_arg(ap, mode_t); 643 va_end(ap); 644 return (__open(path, oflag, mode)); 645 } 646 647 int 648 openat(int fd, const char *path, int oflag, ...) 649 { 650 extern int __openat(int, const char *, int, mode_t); 651 mode_t mode; 652 va_list ap; 653 654 va_start(ap, oflag); 655 mode = va_arg(ap, mode_t); 656 va_end(ap); 657 return (__openat(fd, path, oflag, mode)); 658 } 659 660 ssize_t 661 read(int fd, void *buf, size_t size) 662 { 663 extern ssize_t __read(int, void *, size_t); 664 return (__read(fd, buf, size)); 665 } 666 667 ssize_t 668 write(int fd, const void *buf, size_t size) 669 { 670 extern ssize_t __write(int, const void *, size_t); 671 return (__write(fd, buf, size)); 672 } 673 674 /* 675 * ASCII versions of ctype character classification functions. This avoids 676 * pulling in the entire locale framework that is in libc. 677 */ 678 679 int 680 isdigit(int c) 681 { 682 return ((c >= '0' && c <= '9') ? 1 : 0); 683 } 684 685 int 686 isupper(int c) 687 { 688 return ((c >= 'A' && c <= 'Z') ? 1 : 0); 689 } 690 691 int 692 islower(int c) 693 { 694 return ((c >= 'a' && c <= 'z') ? 1 : 0); 695 } 696 697 int 698 isspace(int c) 699 { 700 return (((c == ' ') || (c == '\t') || (c == '\r') || (c == '\n') || 701 (c == '\v') || (c == '\f')) ? 1 : 0); 702 } 703 704 int 705 isxdigit(int c) 706 { 707 return ((isdigit(c) || (c >= 'A' && c <= 'F') || 708 (c >= 'a' && c <= 'f')) ? 1 : 0); 709 } 710 711 int 712 isalpha(int c) 713 { 714 return ((isupper(c) || islower(c)) ? 1 : 0); 715 } 716 717 int 718 isalnum(int c) 719 { 720 return ((isalpha(c) || isdigit(c)) ? 1 : 0); 721 } 722 723 #if defined(__i386) || defined(__amd64) 724 /* 725 * Instead of utilizing the comm page for clock_gettime, rtld uses the raw 726 * syscall instead. Doing so decreases the surface of symbols needed from libc 727 * for a modest performance cost. 728 */ 729 extern int __clock_gettime_sys(clockid_t, struct timespec *); 730 731 int 732 __clock_gettime(clockid_t clock_id, struct timespec *tp) 733 { 734 return (__clock_gettime_sys(clock_id, tp)); 735 } 736 #endif /* defined(__i386) || defined(__amd64) */ 737